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>
72 int (*deprecated_ui_load_progress_hook
) (const char *section
,
74 void (*deprecated_show_load_progress
) (const char *section
,
75 unsigned long section_sent
,
76 unsigned long section_size
,
77 unsigned long total_sent
,
78 unsigned long total_size
);
79 void (*deprecated_pre_add_symbol_hook
) (const char *);
80 void (*deprecated_post_add_symbol_hook
) (void);
82 using clear_symtab_users_cleanup
83 = FORWARD_SCOPE_EXIT (clear_symtab_users
);
85 /* Global variables owned by this file. */
89 int readnow_symbol_files
;
93 int readnever_symbol_files
;
95 /* Functions this file defines. */
97 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
98 objfile_flags flags
, CORE_ADDR reloff
);
100 static const struct sym_fns
*find_sym_fns (bfd
*);
102 static void overlay_invalidate_all (void);
104 static void simple_free_overlay_table (void);
106 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
109 static int simple_read_overlay_table (void);
111 static int simple_overlay_update_1 (struct obj_section
*);
113 static void symfile_find_segment_sections (struct objfile
*objfile
);
115 /* List of all available sym_fns. On gdb startup, each object file reader
116 calls add_symtab_fns() to register information on each format it is
119 struct registered_sym_fns
121 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
122 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
125 /* BFD flavour that we handle. */
126 enum bfd_flavour sym_flavour
;
128 /* The "vtable" of symbol functions. */
129 const struct sym_fns
*sym_fns
;
132 static std::vector
<registered_sym_fns
> symtab_fns
;
134 /* Values for "set print symbol-loading". */
136 const char print_symbol_loading_off
[] = "off";
137 const char print_symbol_loading_brief
[] = "brief";
138 const char print_symbol_loading_full
[] = "full";
139 static const char *print_symbol_loading_enums
[] =
141 print_symbol_loading_off
,
142 print_symbol_loading_brief
,
143 print_symbol_loading_full
,
146 static const char *print_symbol_loading
= print_symbol_loading_full
;
150 bool auto_solib_add
= true;
153 /* Return non-zero if symbol-loading messages should be printed.
154 FROM_TTY is the standard from_tty argument to gdb commands.
155 If EXEC is non-zero the messages are for the executable.
156 Otherwise, messages are for shared libraries.
157 If FULL is non-zero then the caller is printing a detailed message.
158 E.g., the message includes the shared library name.
159 Otherwise, the caller is printing a brief "summary" message. */
162 print_symbol_loading_p (int from_tty
, int exec
, int full
)
164 if (!from_tty
&& !info_verbose
)
169 /* We don't check FULL for executables, there are few such
170 messages, therefore brief == full. */
171 return print_symbol_loading
!= print_symbol_loading_off
;
174 return print_symbol_loading
== print_symbol_loading_full
;
175 return print_symbol_loading
== print_symbol_loading_brief
;
178 /* True if we are reading a symbol table. */
180 int currently_reading_symtab
= 0;
182 /* Increment currently_reading_symtab and return a cleanup that can be
183 used to decrement it. */
185 scoped_restore_tmpl
<int>
186 increment_reading_symtab (void)
188 gdb_assert (currently_reading_symtab
>= 0);
189 return make_scoped_restore (¤tly_reading_symtab
,
190 currently_reading_symtab
+ 1);
193 /* Remember the lowest-addressed loadable section we've seen.
195 In case of equal vmas, the section with the largest size becomes the
196 lowest-addressed loadable section.
198 If the vmas and sizes are equal, the last section is considered the
199 lowest-addressed loadable section. */
202 find_lowest_section (asection
*sect
, asection
**lowest
)
204 if (0 == (bfd_section_flags (sect
) & (SEC_ALLOC
| SEC_LOAD
)))
207 *lowest
= sect
; /* First loadable section */
208 else if (bfd_section_vma (*lowest
) > bfd_section_vma (sect
))
209 *lowest
= sect
; /* A lower loadable section */
210 else if (bfd_section_vma (*lowest
) == bfd_section_vma (sect
)
211 && (bfd_section_size (*lowest
) <= bfd_section_size (sect
)))
215 /* Build (allocate and populate) a section_addr_info struct from
216 an existing section table. */
219 build_section_addr_info_from_section_table (const target_section_table
&table
)
221 section_addr_info sap
;
223 for (const target_section
&stp
: table
)
225 struct bfd_section
*asect
= stp
.the_bfd_section
;
226 bfd
*abfd
= asect
->owner
;
228 if (bfd_section_flags (asect
) & (SEC_ALLOC
| SEC_LOAD
)
229 && sap
.size () < table
.size ())
230 sap
.emplace_back (stp
.addr
,
231 bfd_section_name (asect
),
232 gdb_bfd_section_index (abfd
, asect
));
238 /* Create a section_addr_info from section offsets in ABFD. */
240 static section_addr_info
241 build_section_addr_info_from_bfd (bfd
*abfd
)
243 struct bfd_section
*sec
;
245 section_addr_info sap
;
246 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
247 if (bfd_section_flags (sec
) & (SEC_ALLOC
| SEC_LOAD
))
248 sap
.emplace_back (bfd_section_vma (sec
),
249 bfd_section_name (sec
),
250 gdb_bfd_section_index (abfd
, sec
));
255 /* Create a section_addr_info from section offsets in OBJFILE. */
258 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
262 /* Before reread_symbols gets rewritten it is not safe to call:
263 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
265 section_addr_info sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
266 for (i
= 0; i
< sap
.size (); i
++)
268 int sectindex
= sap
[i
].sectindex
;
270 sap
[i
].addr
+= objfile
->section_offsets
[sectindex
];
275 /* Initialize OBJFILE's sect_index_* members. */
278 init_objfile_sect_indices (struct objfile
*objfile
)
283 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
285 objfile
->sect_index_text
= sect
->index
;
287 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
289 objfile
->sect_index_data
= sect
->index
;
291 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
293 objfile
->sect_index_bss
= sect
->index
;
295 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
297 objfile
->sect_index_rodata
= sect
->index
;
299 /* This is where things get really weird... We MUST have valid
300 indices for the various sect_index_* members or gdb will abort.
301 So if for example, there is no ".text" section, we have to
302 accomodate that. First, check for a file with the standard
303 one or two segments. */
305 symfile_find_segment_sections (objfile
);
307 /* Except when explicitly adding symbol files at some address,
308 section_offsets contains nothing but zeros, so it doesn't matter
309 which slot in section_offsets the individual sect_index_* members
310 index into. So if they are all zero, it is safe to just point
311 all the currently uninitialized indices to the first slot. But
312 beware: if this is the main executable, it may be relocated
313 later, e.g. by the remote qOffsets packet, and then this will
314 be wrong! That's why we try segments first. */
316 for (i
= 0; i
< objfile
->section_offsets
.size (); i
++)
318 if (objfile
->section_offsets
[i
] != 0)
323 if (i
== objfile
->section_offsets
.size ())
325 if (objfile
->sect_index_text
== -1)
326 objfile
->sect_index_text
= 0;
327 if (objfile
->sect_index_data
== -1)
328 objfile
->sect_index_data
= 0;
329 if (objfile
->sect_index_bss
== -1)
330 objfile
->sect_index_bss
= 0;
331 if (objfile
->sect_index_rodata
== -1)
332 objfile
->sect_index_rodata
= 0;
336 /* Find a unique offset to use for loadable section SECT if
337 the user did not provide an offset. */
340 place_section (bfd
*abfd
, asection
*sect
, section_offsets
&offsets
,
343 CORE_ADDR start_addr
;
345 ULONGEST align
= ((ULONGEST
) 1) << bfd_section_alignment (sect
);
347 /* We are only interested in allocated sections. */
348 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
351 /* If the user specified an offset, honor it. */
352 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
355 /* Otherwise, let's try to find a place for the section. */
356 start_addr
= (lowest
+ align
- 1) & -align
;
363 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
365 int indx
= cur_sec
->index
;
367 /* We don't need to compare against ourself. */
371 /* We can only conflict with allocated sections. */
372 if ((bfd_section_flags (cur_sec
) & SEC_ALLOC
) == 0)
375 /* If the section offset is 0, either the section has not been placed
376 yet, or it was the lowest section placed (in which case LOWEST
377 will be past its end). */
378 if (offsets
[indx
] == 0)
381 /* If this section would overlap us, then we must move up. */
382 if (start_addr
+ bfd_section_size (sect
) > offsets
[indx
]
383 && start_addr
< offsets
[indx
] + bfd_section_size (cur_sec
))
385 start_addr
= offsets
[indx
] + bfd_section_size (cur_sec
);
386 start_addr
= (start_addr
+ align
- 1) & -align
;
391 /* Otherwise, we appear to be OK. So far. */
396 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
397 lowest
= start_addr
+ bfd_section_size (sect
);
400 /* Store section_addr_info as prepared (made relative and with SECTINDEX
401 filled-in) by addr_info_make_relative into SECTION_OFFSETS. */
404 relative_addr_info_to_section_offsets (section_offsets
§ion_offsets
,
405 const section_addr_info
&addrs
)
409 section_offsets
.assign (section_offsets
.size (), 0);
411 /* Now calculate offsets for section that were specified by the caller. */
412 for (i
= 0; i
< addrs
.size (); i
++)
414 const struct other_sections
*osp
;
417 if (osp
->sectindex
== -1)
420 /* Record all sections in offsets. */
421 /* The section_offsets in the objfile are here filled in using
423 section_offsets
[osp
->sectindex
] = osp
->addr
;
427 /* Transform section name S for a name comparison. prelink can split section
428 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
429 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
430 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
431 (`.sbss') section has invalid (increased) virtual address. */
434 addr_section_name (const char *s
)
436 if (strcmp (s
, ".dynbss") == 0)
438 if (strcmp (s
, ".sdynbss") == 0)
444 /* std::sort comparator for addrs_section_sort. Sort entries in
445 ascending order by their (name, sectindex) pair. sectindex makes
446 the sort by name stable. */
449 addrs_section_compar (const struct other_sections
*a
,
450 const struct other_sections
*b
)
454 retval
= strcmp (addr_section_name (a
->name
.c_str ()),
455 addr_section_name (b
->name
.c_str ()));
459 return a
->sectindex
< b
->sectindex
;
462 /* Provide sorted array of pointers to sections of ADDRS. */
464 static std::vector
<const struct other_sections
*>
465 addrs_section_sort (const section_addr_info
&addrs
)
469 std::vector
<const struct other_sections
*> array (addrs
.size ());
470 for (i
= 0; i
< addrs
.size (); i
++)
471 array
[i
] = &addrs
[i
];
473 std::sort (array
.begin (), array
.end (), addrs_section_compar
);
478 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
479 also SECTINDEXes specific to ABFD there. This function can be used to
480 rebase ADDRS to start referencing different BFD than before. */
483 addr_info_make_relative (section_addr_info
*addrs
, bfd
*abfd
)
485 asection
*lower_sect
;
486 CORE_ADDR lower_offset
;
489 /* Find lowest loadable section to be used as starting point for
490 contiguous sections. */
492 for (asection
*iter
: gdb_bfd_sections (abfd
))
493 find_lowest_section (iter
, &lower_sect
);
494 if (lower_sect
== NULL
)
496 warning (_("no loadable sections found in added symbol-file %s"),
497 bfd_get_filename (abfd
));
501 lower_offset
= bfd_section_vma (lower_sect
);
503 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
504 in ABFD. Section names are not unique - there can be multiple sections of
505 the same name. Also the sections of the same name do not have to be
506 adjacent to each other. Some sections may be present only in one of the
507 files. Even sections present in both files do not have to be in the same
510 Use stable sort by name for the sections in both files. Then linearly
511 scan both lists matching as most of the entries as possible. */
513 std::vector
<const struct other_sections
*> addrs_sorted
514 = addrs_section_sort (*addrs
);
516 section_addr_info abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
517 std::vector
<const struct other_sections
*> abfd_addrs_sorted
518 = addrs_section_sort (abfd_addrs
);
520 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
521 ABFD_ADDRS_SORTED. */
523 std::vector
<const struct other_sections
*>
524 addrs_to_abfd_addrs (addrs
->size (), nullptr);
526 std::vector
<const struct other_sections
*>::iterator abfd_sorted_iter
527 = abfd_addrs_sorted
.begin ();
528 for (const other_sections
*sect
: addrs_sorted
)
530 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
532 while (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
533 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
537 if (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
538 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
543 /* Make the found item directly addressable from ADDRS. */
544 index_in_addrs
= sect
- addrs
->data ();
545 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
546 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_sorted_iter
;
548 /* Never use the same ABFD entry twice. */
553 /* Calculate offsets for the loadable sections.
554 FIXME! Sections must be in order of increasing loadable section
555 so that contiguous sections can use the lower-offset!!!
557 Adjust offsets if the segments are not contiguous.
558 If the section is contiguous, its offset should be set to
559 the offset of the highest loadable section lower than it
560 (the loadable section directly below it in memory).
561 this_offset = lower_offset = lower_addr - lower_orig_addr */
563 for (i
= 0; i
< addrs
->size (); i
++)
565 const struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
569 /* This is the index used by BFD. */
570 (*addrs
)[i
].sectindex
= sect
->sectindex
;
572 if ((*addrs
)[i
].addr
!= 0)
574 (*addrs
)[i
].addr
-= sect
->addr
;
575 lower_offset
= (*addrs
)[i
].addr
;
578 (*addrs
)[i
].addr
= lower_offset
;
582 /* addr_section_name transformation is not used for SECT_NAME. */
583 const std::string
§_name
= (*addrs
)[i
].name
;
585 /* This section does not exist in ABFD, which is normally
586 unexpected and we want to issue a warning.
588 However, the ELF prelinker does create a few sections which are
589 marked in the main executable as loadable (they are loaded in
590 memory from the DYNAMIC segment) and yet are not present in
591 separate debug info files. This is fine, and should not cause
592 a warning. Shared libraries contain just the section
593 ".gnu.liblist" but it is not marked as loadable there. There is
594 no other way to identify them than by their name as the sections
595 created by prelink have no special flags.
597 For the sections `.bss' and `.sbss' see addr_section_name. */
599 if (!(sect_name
== ".gnu.liblist"
600 || sect_name
== ".gnu.conflict"
601 || (sect_name
== ".bss"
603 && (*addrs
)[i
- 1].name
== ".dynbss"
604 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
605 || (sect_name
== ".sbss"
607 && (*addrs
)[i
- 1].name
== ".sdynbss"
608 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
609 warning (_("section %s not found in %s"), sect_name
.c_str (),
610 bfd_get_filename (abfd
));
612 (*addrs
)[i
].addr
= 0;
613 (*addrs
)[i
].sectindex
= -1;
618 /* Parse the user's idea of an offset for dynamic linking, into our idea
619 of how to represent it for fast symbol reading. This is the default
620 version of the sym_fns.sym_offsets function for symbol readers that
621 don't need to do anything special. It allocates a section_offsets table
622 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
625 default_symfile_offsets (struct objfile
*objfile
,
626 const section_addr_info
&addrs
)
628 objfile
->section_offsets
.resize (gdb_bfd_count_sections (objfile
->obfd
));
629 relative_addr_info_to_section_offsets (objfile
->section_offsets
, addrs
);
631 /* For relocatable files, all loadable sections will start at zero.
632 The zero is meaningless, so try to pick arbitrary addresses such
633 that no loadable sections overlap. This algorithm is quadratic,
634 but the number of sections in a single object file is generally
636 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
638 bfd
*abfd
= objfile
->obfd
;
641 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
642 /* We do not expect this to happen; just skip this step if the
643 relocatable file has a section with an assigned VMA. */
644 if (bfd_section_vma (cur_sec
) != 0)
649 section_offsets
&offsets
= objfile
->section_offsets
;
651 /* Pick non-overlapping offsets for sections the user did not
653 CORE_ADDR lowest
= 0;
654 for (asection
*sect
: gdb_bfd_sections (objfile
->obfd
))
655 place_section (objfile
->obfd
, sect
, objfile
->section_offsets
,
658 /* Correctly filling in the section offsets is not quite
659 enough. Relocatable files have two properties that
660 (most) shared objects do not:
662 - Their debug information will contain relocations. Some
663 shared libraries do also, but many do not, so this can not
666 - If there are multiple code sections they will be loaded
667 at different relative addresses in memory than they are
668 in the objfile, since all sections in the file will start
671 Because GDB has very limited ability to map from an
672 address in debug info to the correct code section,
673 it relies on adding SECT_OFF_TEXT to things which might be
674 code. If we clear all the section offsets, and set the
675 section VMAs instead, then symfile_relocate_debug_section
676 will return meaningful debug information pointing at the
679 GDB has too many different data structures for section
680 addresses - a bfd, objfile, and so_list all have section
681 tables, as does exec_ops. Some of these could probably
684 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
685 cur_sec
= cur_sec
->next
)
687 if ((bfd_section_flags (cur_sec
) & SEC_ALLOC
) == 0)
690 bfd_set_section_vma (cur_sec
, offsets
[cur_sec
->index
]);
691 exec_set_section_address (bfd_get_filename (abfd
),
693 offsets
[cur_sec
->index
]);
694 offsets
[cur_sec
->index
] = 0;
699 /* Remember the bfd indexes for the .text, .data, .bss and
701 init_objfile_sect_indices (objfile
);
704 /* Divide the file into segments, which are individual relocatable units.
705 This is the default version of the sym_fns.sym_segments function for
706 symbol readers that do not have an explicit representation of segments.
707 It assumes that object files do not have segments, and fully linked
708 files have a single segment. */
710 symfile_segment_data_up
711 default_symfile_segments (bfd
*abfd
)
717 /* Relocatable files contain enough information to position each
718 loadable section independently; they should not be relocated
720 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
723 /* Make sure there is at least one loadable section in the file. */
724 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
726 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
734 low
= bfd_section_vma (sect
);
735 high
= low
+ bfd_section_size (sect
);
737 symfile_segment_data_up
data (new symfile_segment_data
);
739 num_sections
= bfd_count_sections (abfd
);
741 /* All elements are initialized to 0 (map to no segment). */
742 data
->segment_info
.resize (num_sections
);
744 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
748 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
751 vma
= bfd_section_vma (sect
);
754 if (vma
+ bfd_section_size (sect
) > high
)
755 high
= vma
+ bfd_section_size (sect
);
757 data
->segment_info
[i
] = 1;
760 data
->segments
.emplace_back (low
, high
- low
);
765 /* This is a convenience function to call sym_read for OBJFILE and
766 possibly force the partial symbols to be read. */
769 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
771 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
772 objfile
->per_bfd
->minsyms_read
= true;
774 /* find_separate_debug_file_in_section should be called only if there is
775 single binary with no existing separate debug info file. */
776 if (!objfile
->has_partial_symbols ()
777 && objfile
->separate_debug_objfile
== NULL
778 && objfile
->separate_debug_objfile_backlink
== NULL
)
780 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
784 /* find_separate_debug_file_in_section uses the same filename for the
785 virtual section-as-bfd like the bfd filename containing the
786 section. Therefore use also non-canonical name form for the same
787 file containing the section. */
788 symbol_file_add_separate (abfd
.get (),
789 bfd_get_filename (abfd
.get ()),
790 add_flags
| SYMFILE_NOT_FILENAME
, objfile
);
793 if ((add_flags
& SYMFILE_NO_READ
) == 0)
794 objfile
->require_partial_symbols (false);
797 /* Initialize entry point information for this objfile. */
800 init_entry_point_info (struct objfile
*objfile
)
802 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
808 /* Save startup file's range of PC addresses to help blockframe.c
809 decide where the bottom of the stack is. */
811 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
813 /* Executable file -- record its entry point so we'll recognize
814 the startup file because it contains the entry point. */
815 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
816 ei
->entry_point_p
= 1;
818 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
819 && bfd_get_start_address (objfile
->obfd
) != 0)
821 /* Some shared libraries may have entry points set and be
822 runnable. There's no clear way to indicate this, so just check
823 for values other than zero. */
824 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
825 ei
->entry_point_p
= 1;
829 /* Examination of non-executable.o files. Short-circuit this stuff. */
830 ei
->entry_point_p
= 0;
833 if (ei
->entry_point_p
)
835 struct obj_section
*osect
;
836 CORE_ADDR entry_point
= ei
->entry_point
;
839 /* Make certain that the address points at real code, and not a
840 function descriptor. */
841 entry_point
= gdbarch_convert_from_func_ptr_addr
842 (objfile
->arch (), entry_point
, current_inferior ()->top_target ());
844 /* Remove any ISA markers, so that this matches entries in the
847 = gdbarch_addr_bits_remove (objfile
->arch (), entry_point
);
850 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
852 struct bfd_section
*sect
= osect
->the_bfd_section
;
854 if (entry_point
>= bfd_section_vma (sect
)
855 && entry_point
< (bfd_section_vma (sect
)
856 + bfd_section_size (sect
)))
858 ei
->the_bfd_section_index
859 = gdb_bfd_section_index (objfile
->obfd
, sect
);
866 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
870 /* Process a symbol file, as either the main file or as a dynamically
873 This function does not set the OBJFILE's entry-point info.
875 OBJFILE is where the symbols are to be read from.
877 ADDRS is the list of section load addresses. If the user has given
878 an 'add-symbol-file' command, then this is the list of offsets and
879 addresses he or she provided as arguments to the command; or, if
880 we're handling a shared library, these are the actual addresses the
881 sections are loaded at, according to the inferior's dynamic linker
882 (as gleaned by GDB's shared library code). We convert each address
883 into an offset from the section VMA's as it appears in the object
884 file, and then call the file's sym_offsets function to convert this
885 into a format-specific offset table --- a `section_offsets'.
886 The sectindex field is used to control the ordering of sections
887 with the same name. Upon return, it is updated to contain the
888 corresponding BFD section index, or -1 if the section was not found.
890 ADD_FLAGS encodes verbosity level, whether this is main symbol or
891 an extra symbol file such as dynamically loaded code, and whether
892 breakpoint reset should be deferred. */
895 syms_from_objfile_1 (struct objfile
*objfile
,
896 section_addr_info
*addrs
,
897 symfile_add_flags add_flags
)
899 section_addr_info local_addr
;
900 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
902 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
903 objfile
->qf
.clear ();
905 if (objfile
->sf
== NULL
)
907 /* No symbols to load, but we still need to make sure
908 that the section_offsets table is allocated. */
909 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
911 objfile
->section_offsets
.assign (num_sections
, 0);
915 /* Make sure that partially constructed symbol tables will be cleaned up
916 if an error occurs during symbol reading. */
917 gdb::optional
<clear_symtab_users_cleanup
> defer_clear_users
;
919 objfile_up
objfile_holder (objfile
);
921 /* If ADDRS is NULL, put together a dummy address list.
922 We now establish the convention that an addr of zero means
923 no load address was specified. */
929 /* We will modify the main symbol table, make sure that all its users
930 will be cleaned up if an error occurs during symbol reading. */
931 defer_clear_users
.emplace ((symfile_add_flag
) 0);
933 /* Since no error yet, throw away the old symbol table. */
935 if (current_program_space
->symfile_object_file
!= NULL
)
937 current_program_space
->symfile_object_file
->unlink ();
938 gdb_assert (current_program_space
->symfile_object_file
== NULL
);
941 /* Currently we keep symbols from the add-symbol-file command.
942 If the user wants to get rid of them, they should do "symbol-file"
943 without arguments first. Not sure this is the best behavior
946 (*objfile
->sf
->sym_new_init
) (objfile
);
949 /* Convert addr into an offset rather than an absolute address.
950 We find the lowest address of a loaded segment in the objfile,
951 and assume that <addr> is where that got loaded.
953 We no longer warn if the lowest section is not a text segment (as
954 happens for the PA64 port. */
955 if (addrs
->size () > 0)
956 addr_info_make_relative (addrs
, objfile
->obfd
);
958 /* Initialize symbol reading routines for this objfile, allow complaints to
959 appear for this new file, and record how verbose to be, then do the
960 initial symbol reading for this file. */
962 (*objfile
->sf
->sym_init
) (objfile
);
965 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
967 read_symbols (objfile
, add_flags
);
969 /* Discard cleanups as symbol reading was successful. */
971 objfile_holder
.release ();
972 if (defer_clear_users
)
973 defer_clear_users
->release ();
976 /* Same as syms_from_objfile_1, but also initializes the objfile
980 syms_from_objfile (struct objfile
*objfile
,
981 section_addr_info
*addrs
,
982 symfile_add_flags add_flags
)
984 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
985 init_entry_point_info (objfile
);
988 /* Perform required actions after either reading in the initial
989 symbols for a new objfile, or mapping in the symbols from a reusable
990 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
993 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
995 /* If this is the main symbol file we have to clean up all users of the
996 old main symbol file. Otherwise it is sufficient to fixup all the
997 breakpoints that may have been redefined by this symbol file. */
998 if (add_flags
& SYMFILE_MAINLINE
)
1000 /* OK, make it the "real" symbol file. */
1001 current_program_space
->symfile_object_file
= objfile
;
1003 clear_symtab_users (add_flags
);
1005 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1007 breakpoint_re_set ();
1010 /* We're done reading the symbol file; finish off complaints. */
1011 clear_complaints ();
1014 /* Process a symbol file, as either the main file or as a dynamically
1017 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1018 A new reference is acquired by this function.
1020 For NAME description see the objfile constructor.
1022 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1023 extra, such as dynamically loaded code, and what to do with breakpoints.
1025 ADDRS is as described for syms_from_objfile_1, above.
1026 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1028 PARENT is the original objfile if ABFD is a separate debug info file.
1029 Otherwise PARENT is NULL.
1031 Upon success, returns a pointer to the objfile that was added.
1032 Upon failure, jumps back to command level (never returns). */
1034 static struct objfile
*
1035 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1036 symfile_add_flags add_flags
,
1037 section_addr_info
*addrs
,
1038 objfile_flags flags
, struct objfile
*parent
)
1040 struct objfile
*objfile
;
1041 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1042 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1043 const int always_confirm
= add_flags
& SYMFILE_ALWAYS_CONFIRM
;
1044 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1045 && (readnow_symbol_files
1046 || (add_flags
& SYMFILE_NO_READ
) == 0));
1048 if (readnow_symbol_files
)
1050 flags
|= OBJF_READNOW
;
1051 add_flags
&= ~SYMFILE_NO_READ
;
1053 else if (readnever_symbol_files
1054 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1056 flags
|= OBJF_READNEVER
;
1057 add_flags
|= SYMFILE_NO_READ
;
1059 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1060 flags
|= OBJF_NOT_FILENAME
;
1062 /* Give user a chance to burp if ALWAYS_CONFIRM or we'd be
1063 interactively wiping out any existing symbols. */
1067 || ((have_full_symbols () || have_partial_symbols ())
1069 && !query (_("Load new symbol table from \"%s\"? "), name
))
1070 error (_("Not confirmed."));
1073 flags
|= OBJF_MAINLINE
;
1074 objfile
= objfile::make (abfd
, name
, flags
, parent
);
1076 /* We either created a new mapped symbol table, mapped an existing
1077 symbol table file which has not had initial symbol reading
1078 performed, or need to read an unmapped symbol table. */
1081 if (deprecated_pre_add_symbol_hook
)
1082 deprecated_pre_add_symbol_hook (name
);
1084 printf_filtered (_("Reading symbols from %ps...\n"),
1085 styled_string (file_name_style
.style (), name
));
1087 syms_from_objfile (objfile
, addrs
, add_flags
);
1089 /* We now have at least a partial symbol table. Check to see if the
1090 user requested that all symbols be read on initial access via either
1091 the gdb startup command line or on a per symbol file basis. Expand
1092 all partial symbol tables for this objfile if so. */
1094 if ((flags
& OBJF_READNOW
))
1097 printf_filtered (_("Expanding full symbols from %ps...\n"),
1098 styled_string (file_name_style
.style (), name
));
1100 objfile
->expand_all_symtabs ();
1103 /* Note that we only print a message if we have no symbols and have
1104 no separate debug file. If there is a separate debug file which
1105 does not have symbols, we'll have emitted this message for that
1106 file, and so printing it twice is just redundant. */
1107 if (should_print
&& !objfile_has_symbols (objfile
)
1108 && objfile
->separate_debug_objfile
== nullptr)
1109 printf_filtered (_("(No debugging symbols found in %ps)\n"),
1110 styled_string (file_name_style
.style (), name
));
1114 if (deprecated_post_add_symbol_hook
)
1115 deprecated_post_add_symbol_hook ();
1118 /* We print some messages regardless of whether 'from_tty ||
1119 info_verbose' is true, so make sure they go out at the right
1121 gdb_flush (gdb_stdout
);
1123 if (objfile
->sf
== NULL
)
1125 gdb::observers::new_objfile
.notify (objfile
);
1126 return objfile
; /* No symbols. */
1129 finish_new_objfile (objfile
, add_flags
);
1131 gdb::observers::new_objfile
.notify (objfile
);
1133 bfd_cache_close_all ();
1137 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1138 see the objfile constructor. */
1141 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1142 symfile_add_flags symfile_flags
,
1143 struct objfile
*objfile
)
1145 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1146 because sections of BFD may not match sections of OBJFILE and because
1147 vma may have been modified by tools such as prelink. */
1148 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1150 symbol_file_add_with_addrs
1151 (bfd
, name
, symfile_flags
, &sap
,
1152 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1153 | OBJF_USERLOADED
| OBJF_MAINLINE
),
1157 /* Process the symbol file ABFD, as either the main file or as a
1158 dynamically loaded file.
1159 See symbol_file_add_with_addrs's comments for details. */
1162 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1163 symfile_add_flags add_flags
,
1164 section_addr_info
*addrs
,
1165 objfile_flags flags
, struct objfile
*parent
)
1167 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1171 /* Process a symbol file, as either the main file or as a dynamically
1172 loaded file. See symbol_file_add_with_addrs's comments for details. */
1175 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1176 section_addr_info
*addrs
, objfile_flags flags
)
1178 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1180 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1184 /* Call symbol_file_add() with default values and update whatever is
1185 affected by the loading of a new main().
1186 Used when the file is supplied in the gdb command line
1187 and by some targets with special loading requirements.
1188 The auxiliary function, symbol_file_add_main_1(), has the flags
1189 argument for the switches that can only be specified in the symbol_file
1193 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1195 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1199 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1200 objfile_flags flags
, CORE_ADDR reloff
)
1202 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1204 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1206 objfile_rebase (objfile
, reloff
);
1208 /* Getting new symbols may change our opinion about
1209 what is frameless. */
1210 reinit_frame_cache ();
1212 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1213 set_initial_language ();
1217 symbol_file_clear (int from_tty
)
1219 if ((have_full_symbols () || have_partial_symbols ())
1221 && (current_program_space
->symfile_object_file
1222 ? !query (_("Discard symbol table from `%s'? "),
1223 objfile_name (current_program_space
->symfile_object_file
))
1224 : !query (_("Discard symbol table? "))))
1225 error (_("Not confirmed."));
1227 /* solib descriptors may have handles to objfiles. Wipe them before their
1228 objfiles get stale by free_all_objfiles. */
1229 no_shared_libraries (NULL
, from_tty
);
1231 current_program_space
->free_all_objfiles ();
1233 clear_symtab_users (0);
1235 gdb_assert (current_program_space
->symfile_object_file
== NULL
);
1237 printf_filtered (_("No symbol file now.\n"));
1240 /* See symfile.h. */
1242 bool separate_debug_file_debug
= false;
1245 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1246 struct objfile
*parent_objfile
)
1248 unsigned long file_crc
;
1250 struct stat parent_stat
, abfd_stat
;
1251 int verified_as_different
;
1253 /* Find a separate debug info file as if symbols would be present in
1254 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1255 section can contain just the basename of PARENT_OBJFILE without any
1256 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1257 the separate debug infos with the same basename can exist. */
1259 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1262 if (separate_debug_file_debug
)
1264 printf_filtered (_(" Trying %s..."), name
.c_str ());
1265 gdb_flush (gdb_stdout
);
1268 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
));
1272 if (separate_debug_file_debug
)
1273 printf_filtered (_(" no, unable to open.\n"));
1278 /* Verify symlinks were not the cause of filename_cmp name difference above.
1280 Some operating systems, e.g. Windows, do not provide a meaningful
1281 st_ino; they always set it to zero. (Windows does provide a
1282 meaningful st_dev.) Files accessed from gdbservers that do not
1283 support the vFile:fstat packet will also have st_ino set to zero.
1284 Do not indicate a duplicate library in either case. While there
1285 is no guarantee that a system that provides meaningful inode
1286 numbers will never set st_ino to zero, this is merely an
1287 optimization, so we do not need to worry about false negatives. */
1289 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1290 && abfd_stat
.st_ino
!= 0
1291 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1293 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1294 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1296 if (separate_debug_file_debug
)
1297 printf_filtered (_(" no, same file as the objfile.\n"));
1301 verified_as_different
= 1;
1304 verified_as_different
= 0;
1306 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1310 if (separate_debug_file_debug
)
1311 printf_filtered (_(" no, error computing CRC.\n"));
1316 if (crc
!= file_crc
)
1318 unsigned long parent_crc
;
1320 /* If the files could not be verified as different with
1321 bfd_stat then we need to calculate the parent's CRC
1322 to verify whether the files are different or not. */
1324 if (!verified_as_different
)
1326 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1328 if (separate_debug_file_debug
)
1329 printf_filtered (_(" no, error computing CRC.\n"));
1335 if (verified_as_different
|| parent_crc
!= file_crc
)
1336 warning (_("the debug information found in \"%s\""
1337 " does not match \"%s\" (CRC mismatch).\n"),
1338 name
.c_str (), objfile_name (parent_objfile
));
1340 if (separate_debug_file_debug
)
1341 printf_filtered (_(" no, CRC doesn't match.\n"));
1346 if (separate_debug_file_debug
)
1347 printf_filtered (_(" yes!\n"));
1352 std::string debug_file_directory
;
1354 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1355 struct cmd_list_element
*c
, const char *value
)
1357 fprintf_filtered (file
,
1358 _("The directory where separate debug "
1359 "symbols are searched for is \"%s\".\n"),
1363 #if ! defined (DEBUG_SUBDIRECTORY)
1364 #define DEBUG_SUBDIRECTORY ".debug"
1367 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1368 where the original file resides (may not be the same as
1369 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1370 looking for. CANON_DIR is the "realpath" form of DIR.
1371 DIR must contain a trailing '/'.
1372 Returns the path of the file with separate debug info, or an empty
1376 find_separate_debug_file (const char *dir
,
1377 const char *canon_dir
,
1378 const char *debuglink
,
1379 unsigned long crc32
, struct objfile
*objfile
)
1381 if (separate_debug_file_debug
)
1382 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1383 "%s\n"), objfile_name (objfile
));
1385 /* First try in the same directory as the original file. */
1386 std::string debugfile
= dir
;
1387 debugfile
+= debuglink
;
1389 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1392 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1394 debugfile
+= DEBUG_SUBDIRECTORY
;
1396 debugfile
+= debuglink
;
1398 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1401 /* Then try in the global debugfile directories.
1403 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1404 cause "/..." lookups. */
1406 bool target_prefix
= startswith (dir
, "target:");
1407 const char *dir_notarget
= target_prefix
? dir
+ strlen ("target:") : dir
;
1408 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1409 = dirnames_to_char_ptr_vec (debug_file_directory
.c_str ());
1410 gdb::unique_xmalloc_ptr
<char> canon_sysroot
1411 = gdb_realpath (gdb_sysroot
.c_str ());
1413 /* MS-Windows/MS-DOS don't allow colons in file names; we must
1414 convert the drive letter into a one-letter directory, so that the
1415 file name resulting from splicing below will be valid.
1417 FIXME: The below only works when GDB runs on MS-Windows/MS-DOS.
1418 There are various remote-debugging scenarios where such a
1419 transformation of the drive letter might be required when GDB runs
1420 on a Posix host, see
1422 https://sourceware.org/ml/gdb-patches/2019-04/msg00605.html
1424 If some of those scenarios need to be supported, we will need to
1425 use a different condition for HAS_DRIVE_SPEC and a different macro
1426 instead of STRIP_DRIVE_SPEC, which work on Posix systems as well. */
1428 if (HAS_DRIVE_SPEC (dir_notarget
))
1430 drive
= dir_notarget
[0];
1431 dir_notarget
= STRIP_DRIVE_SPEC (dir_notarget
);
1434 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1436 debugfile
= target_prefix
? "target:" : "";
1437 debugfile
+= debugdir
.get ();
1440 debugfile
+= dir_notarget
;
1441 debugfile
+= debuglink
;
1443 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1446 const char *base_path
= NULL
;
1447 if (canon_dir
!= NULL
)
1449 if (canon_sysroot
.get () != NULL
)
1450 base_path
= child_path (canon_sysroot
.get (), canon_dir
);
1452 base_path
= child_path (gdb_sysroot
.c_str (), canon_dir
);
1454 if (base_path
!= NULL
)
1456 /* If the file is in the sysroot, try using its base path in
1457 the global debugfile directory. */
1458 debugfile
= target_prefix
? "target:" : "";
1459 debugfile
+= debugdir
.get ();
1461 debugfile
+= base_path
;
1463 debugfile
+= debuglink
;
1465 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1468 /* If the file is in the sysroot, try using its base path in
1469 the sysroot's global debugfile directory. */
1470 debugfile
= target_prefix
? "target:" : "";
1471 debugfile
+= gdb_sysroot
;
1472 debugfile
+= debugdir
.get ();
1474 debugfile
+= base_path
;
1476 debugfile
+= debuglink
;
1478 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1484 return std::string ();
1487 /* Modify PATH to contain only "[/]directory/" part of PATH.
1488 If there were no directory separators in PATH, PATH will be empty
1489 string on return. */
1492 terminate_after_last_dir_separator (char *path
)
1496 /* Strip off the final filename part, leaving the directory name,
1497 followed by a slash. The directory can be relative or absolute. */
1498 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1499 if (IS_DIR_SEPARATOR (path
[i
]))
1502 /* If I is -1 then no directory is present there and DIR will be "". */
1506 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1507 Returns pathname, or an empty string. */
1510 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1512 unsigned long crc32
;
1514 gdb::unique_xmalloc_ptr
<char> debuglink
1515 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1517 if (debuglink
== NULL
)
1519 /* There's no separate debug info, hence there's no way we could
1520 load it => no warning. */
1521 return std::string ();
1524 std::string dir
= objfile_name (objfile
);
1525 terminate_after_last_dir_separator (&dir
[0]);
1526 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1528 std::string debugfile
1529 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1530 debuglink
.get (), crc32
, objfile
);
1532 if (debugfile
.empty ())
1534 /* For PR gdb/9538, try again with realpath (if different from the
1539 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1540 && S_ISLNK (st_buf
.st_mode
))
1542 gdb::unique_xmalloc_ptr
<char> symlink_dir
1543 (lrealpath (objfile_name (objfile
)));
1544 if (symlink_dir
!= NULL
)
1546 terminate_after_last_dir_separator (symlink_dir
.get ());
1547 if (dir
!= symlink_dir
.get ())
1549 /* Different directory, so try using it. */
1550 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1563 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1567 validate_readnow_readnever (objfile_flags flags
)
1569 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1570 error (_("-readnow and -readnever cannot be used simultaneously"));
1573 /* This is the symbol-file command. Read the file, analyze its
1574 symbols, and add a struct symtab to a symtab list. The syntax of
1575 the command is rather bizarre:
1577 1. The function buildargv implements various quoting conventions
1578 which are undocumented and have little or nothing in common with
1579 the way things are quoted (or not quoted) elsewhere in GDB.
1581 2. Options are used, which are not generally used in GDB (perhaps
1582 "set mapped on", "set readnow on" would be better)
1584 3. The order of options matters, which is contrary to GNU
1585 conventions (because it is confusing and inconvenient). */
1588 symbol_file_command (const char *args
, int from_tty
)
1594 symbol_file_clear (from_tty
);
1598 objfile_flags flags
= OBJF_USERLOADED
;
1599 symfile_add_flags add_flags
= 0;
1601 bool stop_processing_options
= false;
1602 CORE_ADDR offset
= 0;
1607 add_flags
|= SYMFILE_VERBOSE
;
1609 gdb_argv
built_argv (args
);
1610 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1612 if (stop_processing_options
|| *arg
!= '-')
1617 error (_("Unrecognized argument \"%s\""), arg
);
1619 else if (strcmp (arg
, "-readnow") == 0)
1620 flags
|= OBJF_READNOW
;
1621 else if (strcmp (arg
, "-readnever") == 0)
1622 flags
|= OBJF_READNEVER
;
1623 else if (strcmp (arg
, "-o") == 0)
1625 arg
= built_argv
[++idx
];
1627 error (_("Missing argument to -o"));
1629 offset
= parse_and_eval_address (arg
);
1631 else if (strcmp (arg
, "--") == 0)
1632 stop_processing_options
= true;
1634 error (_("Unrecognized argument \"%s\""), arg
);
1638 error (_("no symbol file name was specified"));
1640 validate_readnow_readnever (flags
);
1642 /* Set SYMFILE_DEFER_BP_RESET because the proper displacement for a PIE
1643 (Position Independent Executable) main symbol file will only be
1644 computed by the solib_create_inferior_hook below. Without it,
1645 breakpoint_re_set would fail to insert the breakpoints with the zero
1647 add_flags
|= SYMFILE_DEFER_BP_RESET
;
1649 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1651 solib_create_inferior_hook (from_tty
);
1653 /* Now it's safe to re-add the breakpoints. */
1654 breakpoint_re_set ();
1658 /* Set the initial language. */
1661 set_initial_language (void)
1663 if (language_mode
== language_mode_manual
)
1665 enum language lang
= main_language ();
1666 /* Make C the default language. */
1667 enum language default_lang
= language_c
;
1669 if (lang
== language_unknown
)
1671 const char *name
= main_name ();
1673 = lookup_symbol_in_language (name
, NULL
, VAR_DOMAIN
, default_lang
,
1677 lang
= sym
->language ();
1680 if (lang
== language_unknown
)
1682 lang
= default_lang
;
1685 set_language (lang
);
1686 expected_language
= current_language
; /* Don't warn the user. */
1689 /* Open the file specified by NAME and hand it off to BFD for
1690 preliminary analysis. Return a newly initialized bfd *, which
1691 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1692 absolute). In case of trouble, error() is called. */
1695 symfile_bfd_open (const char *name
)
1699 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1700 if (!is_target_filename (name
))
1702 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1704 /* Look down path for it, allocate 2nd new malloc'd copy. */
1705 desc
= openp (getenv ("PATH"),
1706 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1707 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1708 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1711 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1713 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1714 desc
= openp (getenv ("PATH"),
1715 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1716 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1720 perror_with_name (expanded_name
.get ());
1722 name
= absolute_name
.get ();
1725 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1726 if (sym_bfd
== NULL
)
1727 error (_("`%s': can't open to read symbols: %s."), name
,
1728 bfd_errmsg (bfd_get_error ()));
1730 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1731 bfd_set_cacheable (sym_bfd
.get (), 1);
1733 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1734 error (_("`%s': can't read symbols: %s."), name
,
1735 bfd_errmsg (bfd_get_error ()));
1740 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1741 the section was not found. */
1744 get_section_index (struct objfile
*objfile
, const char *section_name
)
1746 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1754 /* Link SF into the global symtab_fns list.
1755 FLAVOUR is the file format that SF handles.
1756 Called on startup by the _initialize routine in each object file format
1757 reader, to register information about each format the reader is prepared
1761 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1763 symtab_fns
.emplace_back (flavour
, sf
);
1766 /* Initialize OBJFILE to read symbols from its associated BFD. It
1767 either returns or calls error(). The result is an initialized
1768 struct sym_fns in the objfile structure, that contains cached
1769 information about the symbol file. */
1771 static const struct sym_fns
*
1772 find_sym_fns (bfd
*abfd
)
1774 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1776 if (our_flavour
== bfd_target_srec_flavour
1777 || our_flavour
== bfd_target_ihex_flavour
1778 || our_flavour
== bfd_target_tekhex_flavour
)
1779 return NULL
; /* No symbols. */
1781 for (const registered_sym_fns
&rsf
: symtab_fns
)
1782 if (our_flavour
== rsf
.sym_flavour
)
1785 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1786 bfd_get_target (abfd
));
1790 /* This function runs the load command of our current target. */
1793 load_command (const char *arg
, int from_tty
)
1797 /* The user might be reloading because the binary has changed. Take
1798 this opportunity to check. */
1799 reopen_exec_file ();
1805 const char *parg
, *prev
;
1807 arg
= get_exec_file (1);
1809 /* We may need to quote this string so buildargv can pull it
1812 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1814 temp
.append (prev
, parg
- prev
);
1816 temp
.push_back ('\\');
1818 /* If we have not copied anything yet, then we didn't see a
1819 character to quote, and we can just leave ARG unchanged. */
1823 arg
= temp
.c_str ();
1827 target_load (arg
, from_tty
);
1829 /* After re-loading the executable, we don't really know which
1830 overlays are mapped any more. */
1831 overlay_cache_invalid
= 1;
1834 /* This version of "load" should be usable for any target. Currently
1835 it is just used for remote targets, not inftarg.c or core files,
1836 on the theory that only in that case is it useful.
1838 Avoiding xmodem and the like seems like a win (a) because we don't have
1839 to worry about finding it, and (b) On VMS, fork() is very slow and so
1840 we don't want to run a subprocess. On the other hand, I'm not sure how
1841 performance compares. */
1843 static int validate_download
= 0;
1845 /* Opaque data for load_progress. */
1846 struct load_progress_data
1848 /* Cumulative data. */
1849 unsigned long write_count
= 0;
1850 unsigned long data_count
= 0;
1851 bfd_size_type total_size
= 0;
1854 /* Opaque data for load_progress for a single section. */
1855 struct load_progress_section_data
1857 load_progress_section_data (load_progress_data
*cumulative_
,
1858 const char *section_name_
, ULONGEST section_size_
,
1859 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1860 : cumulative (cumulative_
), section_name (section_name_
),
1861 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1864 struct load_progress_data
*cumulative
;
1866 /* Per-section data. */
1867 const char *section_name
;
1868 ULONGEST section_sent
= 0;
1869 ULONGEST section_size
;
1874 /* Opaque data for load_section_callback. */
1875 struct load_section_data
1877 load_section_data (load_progress_data
*progress_data_
)
1878 : progress_data (progress_data_
)
1881 ~load_section_data ()
1883 for (auto &&request
: requests
)
1885 xfree (request
.data
);
1886 delete ((load_progress_section_data
*) request
.baton
);
1890 CORE_ADDR load_offset
= 0;
1891 struct load_progress_data
*progress_data
;
1892 std::vector
<struct memory_write_request
> requests
;
1895 /* Target write callback routine for progress reporting. */
1898 load_progress (ULONGEST bytes
, void *untyped_arg
)
1900 struct load_progress_section_data
*args
1901 = (struct load_progress_section_data
*) untyped_arg
;
1902 struct load_progress_data
*totals
;
1905 /* Writing padding data. No easy way to get at the cumulative
1906 stats, so just ignore this. */
1909 totals
= args
->cumulative
;
1911 if (bytes
== 0 && args
->section_sent
== 0)
1913 /* The write is just starting. Let the user know we've started
1915 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1917 hex_string (args
->section_size
),
1918 paddress (target_gdbarch (), args
->lma
));
1922 if (validate_download
)
1924 /* Broken memories and broken monitors manifest themselves here
1925 when bring new computers to life. This doubles already slow
1927 /* NOTE: cagney/1999-10-18: A more efficient implementation
1928 might add a verify_memory() method to the target vector and
1929 then use that. remote.c could implement that method using
1930 the ``qCRC'' packet. */
1931 gdb::byte_vector
check (bytes
);
1933 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1934 error (_("Download verify read failed at %s"),
1935 paddress (target_gdbarch (), args
->lma
));
1936 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1937 error (_("Download verify compare failed at %s"),
1938 paddress (target_gdbarch (), args
->lma
));
1940 totals
->data_count
+= bytes
;
1942 args
->buffer
+= bytes
;
1943 totals
->write_count
+= 1;
1944 args
->section_sent
+= bytes
;
1945 if (check_quit_flag ()
1946 || (deprecated_ui_load_progress_hook
!= NULL
1947 && deprecated_ui_load_progress_hook (args
->section_name
,
1948 args
->section_sent
)))
1949 error (_("Canceled the download"));
1951 if (deprecated_show_load_progress
!= NULL
)
1952 deprecated_show_load_progress (args
->section_name
,
1956 totals
->total_size
);
1959 /* Service function for generic_load. */
1962 load_one_section (bfd
*abfd
, asection
*asec
,
1963 struct load_section_data
*args
)
1965 bfd_size_type size
= bfd_section_size (asec
);
1966 const char *sect_name
= bfd_section_name (asec
);
1968 if ((bfd_section_flags (asec
) & SEC_LOAD
) == 0)
1974 ULONGEST begin
= bfd_section_lma (asec
) + args
->load_offset
;
1975 ULONGEST end
= begin
+ size
;
1976 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1977 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1979 load_progress_section_data
*section_data
1980 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
1983 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
1986 static void print_transfer_performance (struct ui_file
*stream
,
1987 unsigned long data_count
,
1988 unsigned long write_count
,
1989 std::chrono::steady_clock::duration d
);
1991 /* See symfile.h. */
1994 generic_load (const char *args
, int from_tty
)
1996 struct load_progress_data total_progress
;
1997 struct load_section_data
cbdata (&total_progress
);
1998 struct ui_out
*uiout
= current_uiout
;
2001 error_no_arg (_("file to load"));
2003 gdb_argv
argv (args
);
2005 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2007 if (argv
[1] != NULL
)
2011 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2013 /* If the last word was not a valid number then
2014 treat it as a file name with spaces in. */
2015 if (argv
[1] == endptr
)
2016 error (_("Invalid download offset:%s."), argv
[1]);
2018 if (argv
[2] != NULL
)
2019 error (_("Too many parameters."));
2022 /* Open the file for loading. */
2023 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
));
2024 if (loadfile_bfd
== NULL
)
2025 perror_with_name (filename
.get ());
2027 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2029 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2030 bfd_errmsg (bfd_get_error ()));
2033 for (asection
*asec
: gdb_bfd_sections (loadfile_bfd
))
2034 total_progress
.total_size
+= bfd_section_size (asec
);
2036 for (asection
*asec
: gdb_bfd_sections (loadfile_bfd
))
2037 load_one_section (loadfile_bfd
.get (), asec
, &cbdata
);
2039 using namespace std::chrono
;
2041 steady_clock::time_point start_time
= steady_clock::now ();
2043 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2044 load_progress
) != 0)
2045 error (_("Load failed"));
2047 steady_clock::time_point end_time
= steady_clock::now ();
2049 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2050 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2051 uiout
->text ("Start address ");
2052 uiout
->field_core_addr ("address", target_gdbarch (), entry
);
2053 uiout
->text (", load size ");
2054 uiout
->field_unsigned ("load-size", total_progress
.data_count
);
2056 regcache_write_pc (get_current_regcache (), entry
);
2058 /* Reset breakpoints, now that we have changed the load image. For
2059 instance, breakpoints may have been set (or reset, by
2060 post_create_inferior) while connected to the target but before we
2061 loaded the program. In that case, the prologue analyzer could
2062 have read instructions from the target to find the right
2063 breakpoint locations. Loading has changed the contents of that
2066 breakpoint_re_set ();
2068 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2069 total_progress
.write_count
,
2070 end_time
- start_time
);
2073 /* Report on STREAM the performance of a memory transfer operation,
2074 such as 'load'. DATA_COUNT is the number of bytes transferred.
2075 WRITE_COUNT is the number of separate write operations, or 0, if
2076 that information is not available. TIME is how long the operation
2080 print_transfer_performance (struct ui_file
*stream
,
2081 unsigned long data_count
,
2082 unsigned long write_count
,
2083 std::chrono::steady_clock::duration time
)
2085 using namespace std::chrono
;
2086 struct ui_out
*uiout
= current_uiout
;
2088 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2090 uiout
->text ("Transfer rate: ");
2091 if (ms
.count () > 0)
2093 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2095 if (uiout
->is_mi_like_p ())
2097 uiout
->field_unsigned ("transfer-rate", rate
* 8);
2098 uiout
->text (" bits/sec");
2100 else if (rate
< 1024)
2102 uiout
->field_unsigned ("transfer-rate", rate
);
2103 uiout
->text (" bytes/sec");
2107 uiout
->field_unsigned ("transfer-rate", rate
/ 1024);
2108 uiout
->text (" KB/sec");
2113 uiout
->field_unsigned ("transferred-bits", (data_count
* 8));
2114 uiout
->text (" bits in <1 sec");
2116 if (write_count
> 0)
2119 uiout
->field_unsigned ("write-rate", data_count
/ write_count
);
2120 uiout
->text (" bytes/write");
2122 uiout
->text (".\n");
2125 /* Add an OFFSET to the start address of each section in OBJF, except
2126 sections that were specified in ADDRS. */
2129 set_objfile_default_section_offset (struct objfile
*objf
,
2130 const section_addr_info
&addrs
,
2133 /* Add OFFSET to all sections by default. */
2134 section_offsets
offsets (objf
->section_offsets
.size (), offset
);
2136 /* Create sorted lists of all sections in ADDRS as well as all
2137 sections in OBJF. */
2139 std::vector
<const struct other_sections
*> addrs_sorted
2140 = addrs_section_sort (addrs
);
2142 section_addr_info objf_addrs
2143 = build_section_addr_info_from_objfile (objf
);
2144 std::vector
<const struct other_sections
*> objf_addrs_sorted
2145 = addrs_section_sort (objf_addrs
);
2147 /* Walk the BFD section list, and if a matching section is found in
2148 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2151 Note that both lists may contain multiple sections with the same
2152 name, and then the sections from ADDRS are matched in BFD order
2153 (thanks to sectindex). */
2155 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2156 = addrs_sorted
.begin ();
2157 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2159 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2162 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2164 const struct other_sections
*sect
= *addrs_sorted_iter
;
2165 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2166 cmp
= strcmp (sect_name
, objf_name
);
2168 ++addrs_sorted_iter
;
2172 offsets
[objf_sect
->sectindex
] = 0;
2175 /* Apply the new section offsets. */
2176 objfile_relocate (objf
, offsets
);
2179 /* This function allows the addition of incrementally linked object files.
2180 It does not modify any state in the target, only in the debugger. */
2183 add_symbol_file_command (const char *args
, int from_tty
)
2185 struct gdbarch
*gdbarch
= get_current_arch ();
2186 gdb::unique_xmalloc_ptr
<char> filename
;
2189 struct objfile
*objf
;
2190 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2191 symfile_add_flags add_flags
= 0;
2194 add_flags
|= SYMFILE_VERBOSE
;
2202 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2203 bool stop_processing_options
= false;
2204 CORE_ADDR offset
= 0;
2209 error (_("add-symbol-file takes a file name and an address"));
2211 bool seen_addr
= false;
2212 bool seen_offset
= false;
2213 gdb_argv
argv (args
);
2215 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2217 if (stop_processing_options
|| *arg
!= '-')
2219 if (filename
== NULL
)
2221 /* First non-option argument is always the filename. */
2222 filename
.reset (tilde_expand (arg
));
2224 else if (!seen_addr
)
2226 /* The second non-option argument is always the text
2227 address at which to load the program. */
2228 sect_opts
[0].value
= arg
;
2232 error (_("Unrecognized argument \"%s\""), arg
);
2234 else if (strcmp (arg
, "-readnow") == 0)
2235 flags
|= OBJF_READNOW
;
2236 else if (strcmp (arg
, "-readnever") == 0)
2237 flags
|= OBJF_READNEVER
;
2238 else if (strcmp (arg
, "-s") == 0)
2240 if (argv
[argcnt
+ 1] == NULL
)
2241 error (_("Missing section name after \"-s\""));
2242 else if (argv
[argcnt
+ 2] == NULL
)
2243 error (_("Missing section address after \"-s\""));
2245 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2247 sect_opts
.push_back (sect
);
2250 else if (strcmp (arg
, "-o") == 0)
2252 arg
= argv
[++argcnt
];
2254 error (_("Missing argument to -o"));
2256 offset
= parse_and_eval_address (arg
);
2259 else if (strcmp (arg
, "--") == 0)
2260 stop_processing_options
= true;
2262 error (_("Unrecognized argument \"%s\""), arg
);
2265 if (filename
== NULL
)
2266 error (_("You must provide a filename to be loaded."));
2268 validate_readnow_readnever (flags
);
2270 /* Print the prompt for the query below. And save the arguments into
2271 a sect_addr_info structure to be passed around to other
2272 functions. We have to split this up into separate print
2273 statements because hex_string returns a local static
2276 printf_unfiltered (_("add symbol table from file \"%s\""),
2278 section_addr_info section_addrs
;
2279 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2282 for (; it
!= sect_opts
.end (); ++it
)
2285 const char *val
= it
->value
;
2286 const char *sec
= it
->name
;
2288 if (section_addrs
.empty ())
2289 printf_unfiltered (_(" at\n"));
2290 addr
= parse_and_eval_address (val
);
2292 /* Here we store the section offsets in the order they were
2293 entered on the command line. Every array element is
2294 assigned an ascending section index to preserve the above
2295 order over an unstable sorting algorithm. This dummy
2296 index is not used for any other purpose.
2298 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2299 printf_filtered ("\t%s_addr = %s\n", sec
,
2300 paddress (gdbarch
, addr
));
2302 /* The object's sections are initialized when a
2303 call is made to build_objfile_section_table (objfile).
2304 This happens in reread_symbols.
2305 At this point, we don't know what file type this is,
2306 so we can't determine what section names are valid. */
2309 printf_unfiltered (_("%s offset by %s\n"),
2310 (section_addrs
.empty ()
2311 ? _(" with all sections")
2312 : _("with other sections")),
2313 paddress (gdbarch
, offset
));
2314 else if (section_addrs
.empty ())
2315 printf_unfiltered ("\n");
2317 if (from_tty
&& (!query ("%s", "")))
2318 error (_("Not confirmed."));
2320 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2322 if (!objfile_has_symbols (objf
) && objf
->per_bfd
->minimal_symbol_count
<= 0)
2323 warning (_("newly-added symbol file \"%s\" does not provide any symbols"),
2327 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2329 current_program_space
->add_target_sections (objf
);
2331 /* Getting new symbols may change our opinion about what is
2333 reinit_frame_cache ();
2337 /* This function removes a symbol file that was added via add-symbol-file. */
2340 remove_symbol_file_command (const char *args
, int from_tty
)
2342 struct objfile
*objf
= NULL
;
2343 struct program_space
*pspace
= current_program_space
;
2348 error (_("remove-symbol-file: no symbol file provided"));
2350 gdb_argv
argv (args
);
2352 if (strcmp (argv
[0], "-a") == 0)
2354 /* Interpret the next argument as an address. */
2357 if (argv
[1] == NULL
)
2358 error (_("Missing address argument"));
2360 if (argv
[2] != NULL
)
2361 error (_("Junk after %s"), argv
[1]);
2363 addr
= parse_and_eval_address (argv
[1]);
2365 for (objfile
*objfile
: current_program_space
->objfiles ())
2367 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2368 && (objfile
->flags
& OBJF_SHARED
) != 0
2369 && objfile
->pspace
== pspace
2370 && is_addr_in_objfile (addr
, objfile
))
2377 else if (argv
[0] != NULL
)
2379 /* Interpret the current argument as a file name. */
2381 if (argv
[1] != NULL
)
2382 error (_("Junk after %s"), argv
[0]);
2384 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2386 for (objfile
*objfile
: current_program_space
->objfiles ())
2388 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2389 && (objfile
->flags
& OBJF_SHARED
) != 0
2390 && objfile
->pspace
== pspace
2391 && filename_cmp (filename
.get (), objfile_name (objfile
)) == 0)
2400 error (_("No symbol file found"));
2403 && !query (_("Remove symbol table from file \"%s\"? "),
2404 objfile_name (objf
)))
2405 error (_("Not confirmed."));
2408 clear_symtab_users (0);
2411 /* Re-read symbols if a symbol-file has changed. */
2414 reread_symbols (void)
2417 struct stat new_statbuf
;
2419 std::vector
<struct objfile
*> new_objfiles
;
2421 for (objfile
*objfile
: current_program_space
->objfiles ())
2423 if (objfile
->obfd
== NULL
)
2426 /* Separate debug objfiles are handled in the main objfile. */
2427 if (objfile
->separate_debug_objfile_backlink
)
2430 /* If this object is from an archive (what you usually create with
2431 `ar', often called a `static library' on most systems, though
2432 a `shared library' on AIX is also an archive), then you should
2433 stat on the archive name, not member name. */
2434 if (objfile
->obfd
->my_archive
)
2435 res
= stat (bfd_get_filename (objfile
->obfd
->my_archive
), &new_statbuf
);
2437 res
= stat (objfile_name (objfile
), &new_statbuf
);
2440 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2441 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2442 objfile_name (objfile
));
2445 new_modtime
= new_statbuf
.st_mtime
;
2446 if (new_modtime
!= objfile
->mtime
)
2448 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2449 objfile_name (objfile
));
2451 /* There are various functions like symbol_file_add,
2452 symfile_bfd_open, syms_from_objfile, etc., which might
2453 appear to do what we want. But they have various other
2454 effects which we *don't* want. So we just do stuff
2455 ourselves. We don't worry about mapped files (for one thing,
2456 any mapped file will be out of date). */
2458 /* If we get an error, blow away this objfile (not sure if
2459 that is the correct response for things like shared
2461 objfile_up
objfile_holder (objfile
);
2463 /* We need to do this whenever any symbols go away. */
2464 clear_symtab_users_cleanup
defer_clear_users (0);
2466 if (current_program_space
->exec_bfd () != NULL
2467 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2468 bfd_get_filename (current_program_space
->exec_bfd ())) == 0)
2470 /* Reload EXEC_BFD without asking anything. */
2472 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2475 /* Keep the calls order approx. the same as in free_objfile. */
2477 /* Free the separate debug objfiles. It will be
2478 automatically recreated by sym_read. */
2479 free_objfile_separate_debug (objfile
);
2481 /* Clear the stale source cache. */
2482 forget_cached_source_info ();
2484 /* Remove any references to this objfile in the global
2486 preserve_values (objfile
);
2488 /* Nuke all the state that we will re-read. Much of the following
2489 code which sets things to NULL really is necessary to tell
2490 other parts of GDB that there is nothing currently there.
2492 Try to keep the freeing order compatible with free_objfile. */
2494 if (objfile
->sf
!= NULL
)
2496 (*objfile
->sf
->sym_finish
) (objfile
);
2499 clear_objfile_data (objfile
);
2501 /* Clean up any state BFD has sitting around. */
2503 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2504 const char *obfd_filename
;
2506 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2507 /* Open the new BFD before freeing the old one, so that
2508 the filename remains live. */
2509 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
));
2510 objfile
->obfd
= temp
.release ();
2511 if (objfile
->obfd
== NULL
)
2512 error (_("Can't open %s to read symbols."), obfd_filename
);
2515 std::string original_name
= objfile
->original_name
;
2517 /* bfd_openr sets cacheable to true, which is what we want. */
2518 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2519 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2520 bfd_errmsg (bfd_get_error ()));
2522 /* NB: after this call to obstack_free, objfiles_changed
2523 will need to be called (see discussion below). */
2524 obstack_free (&objfile
->objfile_obstack
, 0);
2525 objfile
->sections
= NULL
;
2526 objfile
->section_offsets
.clear ();
2527 objfile
->sect_index_bss
= -1;
2528 objfile
->sect_index_data
= -1;
2529 objfile
->sect_index_rodata
= -1;
2530 objfile
->sect_index_text
= -1;
2531 objfile
->compunit_symtabs
= NULL
;
2532 objfile
->template_symbols
= NULL
;
2533 objfile
->static_links
.reset (nullptr);
2535 /* obstack_init also initializes the obstack so it is
2536 empty. We could use obstack_specify_allocation but
2537 gdb_obstack.h specifies the alloc/dealloc functions. */
2538 obstack_init (&objfile
->objfile_obstack
);
2540 /* set_objfile_per_bfd potentially allocates the per-bfd
2541 data on the objfile's obstack (if sharing data across
2542 multiple users is not possible), so it's important to
2543 do it *after* the obstack has been initialized. */
2544 set_objfile_per_bfd (objfile
);
2546 objfile
->original_name
2547 = obstack_strdup (&objfile
->objfile_obstack
, original_name
);
2549 /* Reset the sym_fns pointer. The ELF reader can change it
2550 based on whether .gdb_index is present, and we need it to
2551 start over. PR symtab/15885 */
2552 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2553 objfile
->qf
.clear ();
2555 build_objfile_section_table (objfile
);
2557 /* What the hell is sym_new_init for, anyway? The concept of
2558 distinguishing between the main file and additional files
2559 in this way seems rather dubious. */
2560 if (objfile
== current_program_space
->symfile_object_file
)
2562 (*objfile
->sf
->sym_new_init
) (objfile
);
2565 (*objfile
->sf
->sym_init
) (objfile
);
2566 clear_complaints ();
2568 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2570 /* We are about to read new symbols and potentially also
2571 DWARF information. Some targets may want to pass addresses
2572 read from DWARF DIE's through an adjustment function before
2573 saving them, like MIPS, which may call into
2574 "find_pc_section". When called, that function will make
2575 use of per-objfile program space data.
2577 Since we discarded our section information above, we have
2578 dangling pointers in the per-objfile program space data
2579 structure. Force GDB to update the section mapping
2580 information by letting it know the objfile has changed,
2581 making the dangling pointers point to correct data
2584 objfiles_changed ();
2586 /* Recompute section offsets and section indices. */
2587 objfile
->sf
->sym_offsets (objfile
, {});
2589 read_symbols (objfile
, 0);
2591 if (!objfile_has_symbols (objfile
))
2594 printf_filtered (_("(no debugging symbols found)\n"));
2598 /* We're done reading the symbol file; finish off complaints. */
2599 clear_complaints ();
2601 /* Getting new symbols may change our opinion about what is
2604 reinit_frame_cache ();
2606 /* Discard cleanups as symbol reading was successful. */
2607 objfile_holder
.release ();
2608 defer_clear_users
.release ();
2610 /* If the mtime has changed between the time we set new_modtime
2611 and now, we *want* this to be out of date, so don't call stat
2613 objfile
->mtime
= new_modtime
;
2614 init_entry_point_info (objfile
);
2616 new_objfiles
.push_back (objfile
);
2620 if (!new_objfiles
.empty ())
2622 clear_symtab_users (0);
2624 /* clear_objfile_data for each objfile was called before freeing it and
2625 gdb::observers::new_objfile.notify (NULL) has been called by
2626 clear_symtab_users above. Notify the new files now. */
2627 for (auto iter
: new_objfiles
)
2628 gdb::observers::new_objfile
.notify (iter
);
2630 /* At least one objfile has changed, so we can consider that
2631 the executable we're debugging has changed too. */
2632 gdb::observers::executable_changed
.notify ();
2637 struct filename_language
2639 filename_language (const std::string
&ext_
, enum language lang_
)
2640 : ext (ext_
), lang (lang_
)
2647 static std::vector
<filename_language
> filename_language_table
;
2649 /* See symfile.h. */
2652 add_filename_language (const char *ext
, enum language lang
)
2654 gdb_assert (ext
!= nullptr);
2655 filename_language_table
.emplace_back (ext
, lang
);
2658 static std::string ext_args
;
2660 show_ext_args (struct ui_file
*file
, int from_tty
,
2661 struct cmd_list_element
*c
, const char *value
)
2663 fprintf_filtered (file
,
2664 _("Mapping between filename extension "
2665 "and source language is \"%s\".\n"),
2670 set_ext_lang_command (const char *args
,
2671 int from_tty
, struct cmd_list_element
*e
)
2673 const char *begin
= ext_args
.c_str ();
2674 const char *end
= ext_args
.c_str ();
2676 /* First arg is filename extension, starting with '.' */
2678 error (_("'%s': Filename extension must begin with '.'"), ext_args
.c_str ());
2680 /* Find end of first arg. */
2681 while (*end
!= '\0' && !isspace (*end
))
2685 error (_("'%s': two arguments required -- "
2686 "filename extension and language"),
2689 /* Extract first arg, the extension. */
2690 std::string extension
= ext_args
.substr (0, end
- begin
);
2692 /* Find beginning of second arg, which should be a source language. */
2693 begin
= skip_spaces (end
);
2696 error (_("'%s': two arguments required -- "
2697 "filename extension and language"),
2700 /* Lookup the language from among those we know. */
2701 language lang
= language_enum (begin
);
2703 auto it
= filename_language_table
.begin ();
2704 /* Now lookup the filename extension: do we already know it? */
2705 for (; it
!= filename_language_table
.end (); it
++)
2707 if (it
->ext
== extension
)
2711 if (it
== filename_language_table
.end ())
2713 /* New file extension. */
2714 add_filename_language (extension
.data (), lang
);
2718 /* Redefining a previously known filename extension. */
2721 /* query ("Really make files of type %s '%s'?", */
2722 /* ext_args, language_str (lang)); */
2729 info_ext_lang_command (const char *args
, int from_tty
)
2731 printf_filtered (_("Filename extensions and the languages they represent:"));
2732 printf_filtered ("\n\n");
2733 for (const filename_language
&entry
: filename_language_table
)
2734 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2735 language_str (entry
.lang
));
2739 deduce_language_from_filename (const char *filename
)
2743 if (filename
!= NULL
)
2744 if ((cp
= strrchr (filename
, '.')) != NULL
)
2746 for (const filename_language
&entry
: filename_language_table
)
2747 if (entry
.ext
== cp
)
2751 return language_unknown
;
2754 /* Allocate and initialize a new symbol table.
2755 CUST is from the result of allocate_compunit_symtab. */
2758 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2760 struct objfile
*objfile
= cust
->objfile
;
2761 struct symtab
*symtab
2762 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2764 symtab
->filename
= objfile
->intern (filename
);
2765 symtab
->fullname
= NULL
;
2766 symtab
->language
= deduce_language_from_filename (filename
);
2768 /* This can be very verbose with lots of headers.
2769 Only print at higher debug levels. */
2770 if (symtab_create_debug
>= 2)
2772 /* Be a bit clever with debugging messages, and don't print objfile
2773 every time, only when it changes. */
2774 static std::string last_objfile_name
;
2775 const char *this_objfile_name
= objfile_name (objfile
);
2777 if (last_objfile_name
.empty () || last_objfile_name
!= this_objfile_name
)
2779 last_objfile_name
= this_objfile_name
;
2780 fprintf_filtered (gdb_stdlog
,
2781 "Creating one or more symtabs for objfile %s ...\n",
2784 fprintf_filtered (gdb_stdlog
,
2785 "Created symtab %s for module %s.\n",
2786 host_address_to_string (symtab
), filename
);
2789 /* Add it to CUST's list of symtabs. */
2790 if (cust
->filetabs
== NULL
)
2792 cust
->filetabs
= symtab
;
2793 cust
->last_filetab
= symtab
;
2797 cust
->last_filetab
->next
= symtab
;
2798 cust
->last_filetab
= symtab
;
2801 /* Backlink to the containing compunit symtab. */
2802 symtab
->compunit_symtab
= cust
;
2807 /* Allocate and initialize a new compunit.
2808 NAME is the name of the main source file, if there is one, or some
2809 descriptive text if there are no source files. */
2811 struct compunit_symtab
*
2812 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2814 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2815 struct compunit_symtab
);
2816 const char *saved_name
;
2818 cu
->objfile
= objfile
;
2820 /* The name we record here is only for display/debugging purposes.
2821 Just save the basename to avoid path issues (too long for display,
2822 relative vs absolute, etc.). */
2823 saved_name
= lbasename (name
);
2824 cu
->name
= obstack_strdup (&objfile
->objfile_obstack
, saved_name
);
2826 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2828 if (symtab_create_debug
)
2830 fprintf_filtered (gdb_stdlog
,
2831 "Created compunit symtab %s for %s.\n",
2832 host_address_to_string (cu
),
2839 /* Hook CU to the objfile it comes from. */
2842 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2844 cu
->next
= cu
->objfile
->compunit_symtabs
;
2845 cu
->objfile
->compunit_symtabs
= cu
;
2849 /* Reset all data structures in gdb which may contain references to
2850 symbol table data. */
2853 clear_symtab_users (symfile_add_flags add_flags
)
2855 /* Someday, we should do better than this, by only blowing away
2856 the things that really need to be blown. */
2858 /* Clear the "current" symtab first, because it is no longer valid.
2859 breakpoint_re_set may try to access the current symtab. */
2860 clear_current_source_symtab_and_line ();
2863 clear_last_displayed_sal ();
2864 clear_pc_function_cache ();
2865 gdb::observers::new_objfile
.notify (NULL
);
2867 /* Varobj may refer to old symbols, perform a cleanup. */
2868 varobj_invalidate ();
2870 /* Now that the various caches have been cleared, we can re_set
2871 our breakpoints without risking it using stale data. */
2872 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2873 breakpoint_re_set ();
2877 The following code implements an abstraction for debugging overlay sections.
2879 The target model is as follows:
2880 1) The gnu linker will permit multiple sections to be mapped into the
2881 same VMA, each with its own unique LMA (or load address).
2882 2) It is assumed that some runtime mechanism exists for mapping the
2883 sections, one by one, from the load address into the VMA address.
2884 3) This code provides a mechanism for gdb to keep track of which
2885 sections should be considered to be mapped from the VMA to the LMA.
2886 This information is used for symbol lookup, and memory read/write.
2887 For instance, if a section has been mapped then its contents
2888 should be read from the VMA, otherwise from the LMA.
2890 Two levels of debugger support for overlays are available. One is
2891 "manual", in which the debugger relies on the user to tell it which
2892 overlays are currently mapped. This level of support is
2893 implemented entirely in the core debugger, and the information about
2894 whether a section is mapped is kept in the objfile->obj_section table.
2896 The second level of support is "automatic", and is only available if
2897 the target-specific code provides functionality to read the target's
2898 overlay mapping table, and translate its contents for the debugger
2899 (by updating the mapped state information in the obj_section tables).
2901 The interface is as follows:
2903 overlay map <name> -- tell gdb to consider this section mapped
2904 overlay unmap <name> -- tell gdb to consider this section unmapped
2905 overlay list -- list the sections that GDB thinks are mapped
2906 overlay read-target -- get the target's state of what's mapped
2907 overlay off/manual/auto -- set overlay debugging state
2908 Functional interface:
2909 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2910 section, return that section.
2911 find_pc_overlay(pc): find any overlay section that contains
2912 the pc, either in its VMA or its LMA
2913 section_is_mapped(sect): true if overlay is marked as mapped
2914 section_is_overlay(sect): true if section's VMA != LMA
2915 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2916 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2917 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2918 overlay_mapped_address(...): map an address from section's LMA to VMA
2919 overlay_unmapped_address(...): map an address from section's VMA to LMA
2920 symbol_overlayed_address(...): Return a "current" address for symbol:
2921 either in VMA or LMA depending on whether
2922 the symbol's section is currently mapped. */
2924 /* Overlay debugging state: */
2926 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2927 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2929 /* Function: section_is_overlay (SECTION)
2930 Returns true if SECTION has VMA not equal to LMA, ie.
2931 SECTION is loaded at an address different from where it will "run". */
2934 section_is_overlay (struct obj_section
*section
)
2936 if (overlay_debugging
&& section
)
2938 asection
*bfd_section
= section
->the_bfd_section
;
2940 if (bfd_section_lma (bfd_section
) != 0
2941 && bfd_section_lma (bfd_section
) != bfd_section_vma (bfd_section
))
2948 /* Function: overlay_invalidate_all (void)
2949 Invalidate the mapped state of all overlay sections (mark it as stale). */
2952 overlay_invalidate_all (void)
2954 struct obj_section
*sect
;
2956 for (objfile
*objfile
: current_program_space
->objfiles ())
2957 ALL_OBJFILE_OSECTIONS (objfile
, sect
)
2958 if (section_is_overlay (sect
))
2959 sect
->ovly_mapped
= -1;
2962 /* Function: section_is_mapped (SECTION)
2963 Returns true if section is an overlay, and is currently mapped.
2965 Access to the ovly_mapped flag is restricted to this function, so
2966 that we can do automatic update. If the global flag
2967 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2968 overlay_invalidate_all. If the mapped state of the particular
2969 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2972 section_is_mapped (struct obj_section
*osect
)
2974 struct gdbarch
*gdbarch
;
2976 if (osect
== 0 || !section_is_overlay (osect
))
2979 switch (overlay_debugging
)
2983 return 0; /* overlay debugging off */
2984 case ovly_auto
: /* overlay debugging automatic */
2985 /* Unles there is a gdbarch_overlay_update function,
2986 there's really nothing useful to do here (can't really go auto). */
2987 gdbarch
= osect
->objfile
->arch ();
2988 if (gdbarch_overlay_update_p (gdbarch
))
2990 if (overlay_cache_invalid
)
2992 overlay_invalidate_all ();
2993 overlay_cache_invalid
= 0;
2995 if (osect
->ovly_mapped
== -1)
2996 gdbarch_overlay_update (gdbarch
, osect
);
2999 case ovly_on
: /* overlay debugging manual */
3000 return osect
->ovly_mapped
== 1;
3004 /* Function: pc_in_unmapped_range
3005 If PC falls into the lma range of SECTION, return true, else false. */
3008 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3010 if (section_is_overlay (section
))
3012 asection
*bfd_section
= section
->the_bfd_section
;
3014 /* We assume the LMA is relocated by the same offset as the VMA. */
3015 bfd_vma size
= bfd_section_size (bfd_section
);
3016 CORE_ADDR offset
= section
->offset ();
3018 if (bfd_section_lma (bfd_section
) + offset
<= pc
3019 && pc
< bfd_section_lma (bfd_section
) + offset
+ size
)
3026 /* Function: pc_in_mapped_range
3027 If PC falls into the vma range of SECTION, return true, else false. */
3030 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3032 if (section_is_overlay (section
))
3034 if (section
->addr () <= pc
3035 && pc
< section
->endaddr ())
3042 /* Return true if the mapped ranges of sections A and B overlap, false
3046 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3048 CORE_ADDR a_start
= a
->addr ();
3049 CORE_ADDR a_end
= a
->endaddr ();
3050 CORE_ADDR b_start
= b
->addr ();
3051 CORE_ADDR b_end
= b
->endaddr ();
3053 return (a_start
< b_end
&& b_start
< a_end
);
3056 /* Function: overlay_unmapped_address (PC, SECTION)
3057 Returns the address corresponding to PC in the unmapped (load) range.
3058 May be the same as PC. */
3061 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3063 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3065 asection
*bfd_section
= section
->the_bfd_section
;
3067 return (pc
+ bfd_section_lma (bfd_section
)
3068 - bfd_section_vma (bfd_section
));
3074 /* Function: overlay_mapped_address (PC, SECTION)
3075 Returns the address corresponding to PC in the mapped (runtime) range.
3076 May be the same as PC. */
3079 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3081 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3083 asection
*bfd_section
= section
->the_bfd_section
;
3085 return (pc
+ bfd_section_vma (bfd_section
)
3086 - bfd_section_lma (bfd_section
));
3092 /* Function: symbol_overlayed_address
3093 Return one of two addresses (relative to the VMA or to the LMA),
3094 depending on whether the section is mapped or not. */
3097 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3099 if (overlay_debugging
)
3101 /* If the symbol has no section, just return its regular address. */
3104 /* If the symbol's section is not an overlay, just return its
3106 if (!section_is_overlay (section
))
3108 /* If the symbol's section is mapped, just return its address. */
3109 if (section_is_mapped (section
))
3112 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3113 * then return its LOADED address rather than its vma address!!
3115 return overlay_unmapped_address (address
, section
);
3120 /* Function: find_pc_overlay (PC)
3121 Return the best-match overlay section for PC:
3122 If PC matches a mapped overlay section's VMA, return that section.
3123 Else if PC matches an unmapped section's VMA, return that section.
3124 Else if PC matches an unmapped section's LMA, return that section. */
3126 struct obj_section
*
3127 find_pc_overlay (CORE_ADDR pc
)
3129 struct obj_section
*osect
, *best_match
= NULL
;
3131 if (overlay_debugging
)
3133 for (objfile
*objfile
: current_program_space
->objfiles ())
3134 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3135 if (section_is_overlay (osect
))
3137 if (pc_in_mapped_range (pc
, osect
))
3139 if (section_is_mapped (osect
))
3144 else if (pc_in_unmapped_range (pc
, osect
))
3151 /* Function: find_pc_mapped_section (PC)
3152 If PC falls into the VMA address range of an overlay section that is
3153 currently marked as MAPPED, return that section. Else return NULL. */
3155 struct obj_section
*
3156 find_pc_mapped_section (CORE_ADDR pc
)
3158 struct obj_section
*osect
;
3160 if (overlay_debugging
)
3162 for (objfile
*objfile
: current_program_space
->objfiles ())
3163 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3164 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3171 /* Function: list_overlays_command
3172 Print a list of mapped sections and their PC ranges. */
3175 list_overlays_command (const char *args
, int from_tty
)
3178 struct obj_section
*osect
;
3180 if (overlay_debugging
)
3182 for (objfile
*objfile
: current_program_space
->objfiles ())
3183 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3184 if (section_is_mapped (osect
))
3186 struct gdbarch
*gdbarch
= objfile
->arch ();
3191 vma
= bfd_section_vma (osect
->the_bfd_section
);
3192 lma
= bfd_section_lma (osect
->the_bfd_section
);
3193 size
= bfd_section_size (osect
->the_bfd_section
);
3194 name
= bfd_section_name (osect
->the_bfd_section
);
3196 printf_filtered ("Section %s, loaded at ", name
);
3197 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3198 puts_filtered (" - ");
3199 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3200 printf_filtered (", mapped at ");
3201 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3202 puts_filtered (" - ");
3203 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3204 puts_filtered ("\n");
3210 printf_filtered (_("No sections are mapped.\n"));
3213 /* Function: map_overlay_command
3214 Mark the named section as mapped (ie. residing at its VMA address). */
3217 map_overlay_command (const char *args
, int from_tty
)
3219 struct obj_section
*sec
, *sec2
;
3221 if (!overlay_debugging
)
3222 error (_("Overlay debugging not enabled. Use "
3223 "either the 'overlay auto' or\n"
3224 "the 'overlay manual' command."));
3226 if (args
== 0 || *args
== 0)
3227 error (_("Argument required: name of an overlay section"));
3229 /* First, find a section matching the user supplied argument. */
3230 for (objfile
*obj_file
: current_program_space
->objfiles ())
3231 ALL_OBJFILE_OSECTIONS (obj_file
, sec
)
3232 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3234 /* Now, check to see if the section is an overlay. */
3235 if (!section_is_overlay (sec
))
3236 continue; /* not an overlay section */
3238 /* Mark the overlay as "mapped". */
3239 sec
->ovly_mapped
= 1;
3241 /* Next, make a pass and unmap any sections that are
3242 overlapped by this new section: */
3243 for (objfile
*objfile2
: current_program_space
->objfiles ())
3244 ALL_OBJFILE_OSECTIONS (objfile2
, sec2
)
3245 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
,
3249 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3250 bfd_section_name (sec2
->the_bfd_section
));
3251 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3255 error (_("No overlay section called %s"), args
);
3258 /* Function: unmap_overlay_command
3259 Mark the overlay section as unmapped
3260 (ie. resident in its LMA address range, rather than the VMA range). */
3263 unmap_overlay_command (const char *args
, int from_tty
)
3265 struct obj_section
*sec
= NULL
;
3267 if (!overlay_debugging
)
3268 error (_("Overlay debugging not enabled. "
3269 "Use either the 'overlay auto' or\n"
3270 "the 'overlay manual' command."));
3272 if (args
== 0 || *args
== 0)
3273 error (_("Argument required: name of an overlay section"));
3275 /* First, find a section matching the user supplied argument. */
3276 for (objfile
*objfile
: current_program_space
->objfiles ())
3277 ALL_OBJFILE_OSECTIONS (objfile
, sec
)
3278 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3280 if (!sec
->ovly_mapped
)
3281 error (_("Section %s is not mapped"), args
);
3282 sec
->ovly_mapped
= 0;
3285 error (_("No overlay section called %s"), args
);
3288 /* Function: overlay_auto_command
3289 A utility command to turn on overlay debugging.
3290 Possibly this should be done via a set/show command. */
3293 overlay_auto_command (const char *args
, int from_tty
)
3295 overlay_debugging
= ovly_auto
;
3296 enable_overlay_breakpoints ();
3298 printf_unfiltered (_("Automatic overlay debugging enabled."));
3301 /* Function: overlay_manual_command
3302 A utility command to turn on overlay debugging.
3303 Possibly this should be done via a set/show command. */
3306 overlay_manual_command (const char *args
, int from_tty
)
3308 overlay_debugging
= ovly_on
;
3309 disable_overlay_breakpoints ();
3311 printf_unfiltered (_("Overlay debugging enabled."));
3314 /* Function: overlay_off_command
3315 A utility command to turn on overlay debugging.
3316 Possibly this should be done via a set/show command. */
3319 overlay_off_command (const char *args
, int from_tty
)
3321 overlay_debugging
= ovly_off
;
3322 disable_overlay_breakpoints ();
3324 printf_unfiltered (_("Overlay debugging disabled."));
3328 overlay_load_command (const char *args
, int from_tty
)
3330 struct gdbarch
*gdbarch
= get_current_arch ();
3332 if (gdbarch_overlay_update_p (gdbarch
))
3333 gdbarch_overlay_update (gdbarch
, NULL
);
3335 error (_("This target does not know how to read its overlay state."));
3338 /* Command list chain containing all defined "overlay" subcommands. */
3339 static struct cmd_list_element
*overlaylist
;
3341 /* Target Overlays for the "Simplest" overlay manager:
3343 This is GDB's default target overlay layer. It works with the
3344 minimal overlay manager supplied as an example by Cygnus. The
3345 entry point is via a function pointer "gdbarch_overlay_update",
3346 so targets that use a different runtime overlay manager can
3347 substitute their own overlay_update function and take over the
3350 The overlay_update function pokes around in the target's data structures
3351 to see what overlays are mapped, and updates GDB's overlay mapping with
3354 In this simple implementation, the target data structures are as follows:
3355 unsigned _novlys; /# number of overlay sections #/
3356 unsigned _ovly_table[_novlys][4] = {
3357 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3358 {..., ..., ..., ...},
3360 unsigned _novly_regions; /# number of overlay regions #/
3361 unsigned _ovly_region_table[_novly_regions][3] = {
3362 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3365 These functions will attempt to update GDB's mappedness state in the
3366 symbol section table, based on the target's mappedness state.
3368 To do this, we keep a cached copy of the target's _ovly_table, and
3369 attempt to detect when the cached copy is invalidated. The main
3370 entry point is "simple_overlay_update(SECT), which looks up SECT in
3371 the cached table and re-reads only the entry for that section from
3372 the target (whenever possible). */
3374 /* Cached, dynamically allocated copies of the target data structures: */
3375 static unsigned (*cache_ovly_table
)[4] = 0;
3376 static unsigned cache_novlys
= 0;
3377 static CORE_ADDR cache_ovly_table_base
= 0;
3380 VMA
, OSIZE
, LMA
, MAPPED
3383 /* Throw away the cached copy of _ovly_table. */
3386 simple_free_overlay_table (void)
3388 xfree (cache_ovly_table
);
3390 cache_ovly_table
= NULL
;
3391 cache_ovly_table_base
= 0;
3394 /* Read an array of ints of size SIZE from the target into a local buffer.
3395 Convert to host order. int LEN is number of ints. */
3398 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3399 int len
, int size
, enum bfd_endian byte_order
)
3401 /* FIXME (alloca): Not safe if array is very large. */
3402 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3405 read_memory (memaddr
, buf
, len
* size
);
3406 for (i
= 0; i
< len
; i
++)
3407 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3410 /* Find and grab a copy of the target _ovly_table
3411 (and _novlys, which is needed for the table's size). */
3414 simple_read_overlay_table (void)
3416 struct bound_minimal_symbol novlys_msym
;
3417 struct bound_minimal_symbol ovly_table_msym
;
3418 struct gdbarch
*gdbarch
;
3420 enum bfd_endian byte_order
;
3422 simple_free_overlay_table ();
3423 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3424 if (! novlys_msym
.minsym
)
3426 error (_("Error reading inferior's overlay table: "
3427 "couldn't find `_novlys' variable\n"
3428 "in inferior. Use `overlay manual' mode."));
3432 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3433 if (! ovly_table_msym
.minsym
)
3435 error (_("Error reading inferior's overlay table: couldn't find "
3436 "`_ovly_table' array\n"
3437 "in inferior. Use `overlay manual' mode."));
3441 gdbarch
= ovly_table_msym
.objfile
->arch ();
3442 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3443 byte_order
= gdbarch_byte_order (gdbarch
);
3445 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3448 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3449 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3450 read_target_long_array (cache_ovly_table_base
,
3451 (unsigned int *) cache_ovly_table
,
3452 cache_novlys
* 4, word_size
, byte_order
);
3454 return 1; /* SUCCESS */
3457 /* Function: simple_overlay_update_1
3458 A helper function for simple_overlay_update. Assuming a cached copy
3459 of _ovly_table exists, look through it to find an entry whose vma,
3460 lma and size match those of OSECT. Re-read the entry and make sure
3461 it still matches OSECT (else the table may no longer be valid).
3462 Set OSECT's mapped state to match the entry. Return: 1 for
3463 success, 0 for failure. */
3466 simple_overlay_update_1 (struct obj_section
*osect
)
3469 asection
*bsect
= osect
->the_bfd_section
;
3470 struct gdbarch
*gdbarch
= osect
->objfile
->arch ();
3471 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3472 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3474 for (i
= 0; i
< cache_novlys
; i
++)
3475 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3476 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3478 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3479 (unsigned int *) cache_ovly_table
[i
],
3480 4, word_size
, byte_order
);
3481 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3482 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3484 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3487 else /* Warning! Warning! Target's ovly table has changed! */
3493 /* Function: simple_overlay_update
3494 If OSECT is NULL, then update all sections' mapped state
3495 (after re-reading the entire target _ovly_table).
3496 If OSECT is non-NULL, then try to find a matching entry in the
3497 cached ovly_table and update only OSECT's mapped state.
3498 If a cached entry can't be found or the cache isn't valid, then
3499 re-read the entire cache, and go ahead and update all sections. */
3502 simple_overlay_update (struct obj_section
*osect
)
3504 /* Were we given an osect to look up? NULL means do all of them. */
3506 /* Have we got a cached copy of the target's overlay table? */
3507 if (cache_ovly_table
!= NULL
)
3509 /* Does its cached location match what's currently in the
3511 struct bound_minimal_symbol minsym
3512 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3514 if (minsym
.minsym
== NULL
)
3515 error (_("Error reading inferior's overlay table: couldn't "
3516 "find `_ovly_table' array\n"
3517 "in inferior. Use `overlay manual' mode."));
3519 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3520 /* Then go ahead and try to look up this single section in
3522 if (simple_overlay_update_1 (osect
))
3523 /* Found it! We're done. */
3527 /* Cached table no good: need to read the entire table anew.
3528 Or else we want all the sections, in which case it's actually
3529 more efficient to read the whole table in one block anyway. */
3531 if (! simple_read_overlay_table ())
3534 /* Now may as well update all sections, even if only one was requested. */
3535 for (objfile
*objfile
: current_program_space
->objfiles ())
3536 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3537 if (section_is_overlay (osect
))
3540 asection
*bsect
= osect
->the_bfd_section
;
3542 for (i
= 0; i
< cache_novlys
; i
++)
3543 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3544 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3545 { /* obj_section matches i'th entry in ovly_table. */
3546 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3547 break; /* finished with inner for loop: break out. */
3552 /* Default implementation for sym_relocate. */
3555 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3558 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3560 bfd
*abfd
= sectp
->owner
;
3562 /* We're only interested in sections with relocation
3564 if ((sectp
->flags
& SEC_RELOC
) == 0)
3567 /* We will handle section offsets properly elsewhere, so relocate as if
3568 all sections begin at 0. */
3569 for (asection
*sect
: gdb_bfd_sections (abfd
))
3571 sect
->output_section
= sect
;
3572 sect
->output_offset
= 0;
3575 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3578 /* Relocate the contents of a debug section SECTP in ABFD. The
3579 contents are stored in BUF if it is non-NULL, or returned in a
3580 malloc'd buffer otherwise.
3582 For some platforms and debug info formats, shared libraries contain
3583 relocations against the debug sections (particularly for DWARF-2;
3584 one affected platform is PowerPC GNU/Linux, although it depends on
3585 the version of the linker in use). Also, ELF object files naturally
3586 have unresolved relocations for their debug sections. We need to apply
3587 the relocations in order to get the locations of symbols correct.
3588 Another example that may require relocation processing, is the
3589 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3593 symfile_relocate_debug_section (struct objfile
*objfile
,
3594 asection
*sectp
, bfd_byte
*buf
)
3596 gdb_assert (objfile
->sf
->sym_relocate
);
3598 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3601 symfile_segment_data_up
3602 get_symfile_segment_data (bfd
*abfd
)
3604 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3609 return sf
->sym_segments (abfd
);
3613 - DATA, containing segment addresses from the object file ABFD, and
3614 the mapping from ABFD's sections onto the segments that own them,
3616 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3617 segment addresses reported by the target,
3618 store the appropriate offsets for each section in OFFSETS.
3620 If there are fewer entries in SEGMENT_BASES than there are segments
3621 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3623 If there are more entries, then ignore the extra. The target may
3624 not be able to distinguish between an empty data segment and a
3625 missing data segment; a missing text segment is less plausible. */
3628 symfile_map_offsets_to_segments (bfd
*abfd
,
3629 const struct symfile_segment_data
*data
,
3630 section_offsets
&offsets
,
3631 int num_segment_bases
,
3632 const CORE_ADDR
*segment_bases
)
3637 /* It doesn't make sense to call this function unless you have some
3638 segment base addresses. */
3639 gdb_assert (num_segment_bases
> 0);
3641 /* If we do not have segment mappings for the object file, we
3642 can not relocate it by segments. */
3643 gdb_assert (data
!= NULL
);
3644 gdb_assert (data
->segments
.size () > 0);
3646 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3648 int which
= data
->segment_info
[i
];
3650 gdb_assert (0 <= which
&& which
<= data
->segments
.size ());
3652 /* Don't bother computing offsets for sections that aren't
3653 loaded as part of any segment. */
3657 /* Use the last SEGMENT_BASES entry as the address of any extra
3658 segments mentioned in DATA->segment_info. */
3659 if (which
> num_segment_bases
)
3660 which
= num_segment_bases
;
3662 offsets
[i
] = segment_bases
[which
- 1] - data
->segments
[which
- 1].base
;
3669 symfile_find_segment_sections (struct objfile
*objfile
)
3671 bfd
*abfd
= objfile
->obfd
;
3675 symfile_segment_data_up data
3676 = get_symfile_segment_data (objfile
->obfd
);
3680 if (data
->segments
.size () != 1 && data
->segments
.size () != 2)
3683 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3685 int which
= data
->segment_info
[i
];
3689 if (objfile
->sect_index_text
== -1)
3690 objfile
->sect_index_text
= sect
->index
;
3692 if (objfile
->sect_index_rodata
== -1)
3693 objfile
->sect_index_rodata
= sect
->index
;
3695 else if (which
== 2)
3697 if (objfile
->sect_index_data
== -1)
3698 objfile
->sect_index_data
= sect
->index
;
3700 if (objfile
->sect_index_bss
== -1)
3701 objfile
->sect_index_bss
= sect
->index
;
3706 /* Listen for free_objfile events. */
3709 symfile_free_objfile (struct objfile
*objfile
)
3711 /* Remove the target sections owned by this objfile. */
3712 if (objfile
!= NULL
)
3713 current_program_space
->remove_target_sections ((void *) objfile
);
3716 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3717 Expand all symtabs that match the specified criteria.
3718 See quick_symbol_functions.expand_symtabs_matching for details. */
3721 expand_symtabs_matching
3722 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3723 const lookup_name_info
&lookup_name
,
3724 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3725 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3726 block_search_flags search_flags
,
3727 enum search_domain kind
)
3729 for (objfile
*objfile
: current_program_space
->objfiles ())
3730 if (!objfile
->expand_symtabs_matching (file_matcher
,
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 (gdb::function_view
<symbol_filename_ftype
> fun
,
3749 for (objfile
*objfile
: current_program_space
->objfiles ())
3750 objfile
->map_symbol_filenames (fun
, 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 ext_args
= ".hello rust";
3789 set_ext_lang_command (NULL
, 1, NULL
);
3791 lang
= deduce_language_from_filename ("cake.hello");
3792 SELF_CHECK (lang
== language_rust
);
3794 /* Test overriding an existing extension using the CLI command. */
3795 int size_before
= filename_language_table
.size ();
3796 ext_args
= ".hello pascal";
3797 set_ext_lang_command (NULL
, 1, NULL
);
3798 int size_after
= filename_language_table
.size ();
3800 lang
= deduce_language_from_filename ("cake.hello");
3801 SELF_CHECK (lang
== language_pascal
);
3802 SELF_CHECK (size_before
== size_after
);
3805 } /* namespace filename_language */
3806 } /* namespace selftests */
3808 #endif /* GDB_SELF_TEST */
3810 void _initialize_symfile ();
3812 _initialize_symfile ()
3814 struct cmd_list_element
*c
;
3816 gdb::observers::free_objfile
.attach (symfile_free_objfile
, "symfile");
3818 #define READNOW_READNEVER_HELP \
3819 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3820 immediately. This makes the command slower, but may make future operations\n\
3822 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3823 symbolic debug information."
3825 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3826 Load symbol table from executable file FILE.\n\
3827 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3828 OFF is an optional offset which is added to each section address.\n\
3829 The `file' command can also load symbol tables, as well as setting the file\n\
3830 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3831 set_cmd_completer (c
, filename_completer
);
3833 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3834 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3835 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3836 [-s SECT-NAME SECT-ADDR]...\n\
3837 ADDR is the starting address of the file's text.\n\
3838 Each '-s' argument provides a section name and address, and\n\
3839 should be specified if the data and bss segments are not contiguous\n\
3840 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3841 OFF is an optional offset which is added to the default load addresses\n\
3842 of all sections for which no other address was specified.\n"
3843 READNOW_READNEVER_HELP
),
3845 set_cmd_completer (c
, filename_completer
);
3847 c
= add_cmd ("remove-symbol-file", class_files
,
3848 remove_symbol_file_command
, _("\
3849 Remove a symbol file added via the add-symbol-file command.\n\
3850 Usage: remove-symbol-file FILENAME\n\
3851 remove-symbol-file -a ADDRESS\n\
3852 The file to remove can be identified by its filename or by an address\n\
3853 that lies within the boundaries of this symbol file in memory."),
3856 c
= add_cmd ("load", class_files
, load_command
, _("\
3857 Dynamically load FILE into the running program.\n\
3858 FILE symbols are recorded for access from GDB.\n\
3859 Usage: load [FILE] [OFFSET]\n\
3860 An optional load OFFSET may also be given as a literal address.\n\
3861 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3862 on its own."), &cmdlist
);
3863 set_cmd_completer (c
, filename_completer
);
3865 cmd_list_element
*overlay_cmd
3866 = add_basic_prefix_cmd ("overlay", class_support
,
3867 _("Commands for debugging overlays."), &overlaylist
,
3870 add_com_alias ("ovly", overlay_cmd
, class_support
, 1);
3871 add_com_alias ("ov", overlay_cmd
, class_support
, 1);
3873 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3874 _("Assert that an overlay section is mapped."), &overlaylist
);
3876 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3877 _("Assert that an overlay section is unmapped."), &overlaylist
);
3879 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3880 _("List mappings of overlay sections."), &overlaylist
);
3882 add_cmd ("manual", class_support
, overlay_manual_command
,
3883 _("Enable overlay debugging."), &overlaylist
);
3884 add_cmd ("off", class_support
, overlay_off_command
,
3885 _("Disable overlay debugging."), &overlaylist
);
3886 add_cmd ("auto", class_support
, overlay_auto_command
,
3887 _("Enable automatic overlay debugging."), &overlaylist
);
3888 add_cmd ("load-target", class_support
, overlay_load_command
,
3889 _("Read the overlay mapping state from the target."), &overlaylist
);
3891 /* Filename extension to source language lookup table: */
3892 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3894 Set mapping between filename extension and source language."), _("\
3895 Show mapping between filename extension and source language."), _("\
3896 Usage: set extension-language .foo bar"),
3897 set_ext_lang_command
,
3899 &setlist
, &showlist
);
3901 add_info ("extensions", info_ext_lang_command
,
3902 _("All filename extensions associated with a source language."));
3904 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3905 &debug_file_directory
, _("\
3906 Set the directories where separate debug symbols are searched for."), _("\
3907 Show the directories where separate debug symbols are searched for."), _("\
3908 Separate debug symbols are first searched for in the same\n\
3909 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3910 and lastly at the path of the directory of the binary with\n\
3911 each global debug-file-directory component prepended."),
3913 show_debug_file_directory
,
3914 &setlist
, &showlist
);
3916 add_setshow_enum_cmd ("symbol-loading", no_class
,
3917 print_symbol_loading_enums
, &print_symbol_loading
,
3919 Set printing of symbol loading messages."), _("\
3920 Show printing of symbol loading messages."), _("\
3921 off == turn all messages off\n\
3922 brief == print messages for the executable,\n\
3923 and brief messages for shared libraries\n\
3924 full == print messages for the executable,\n\
3925 and messages for each shared library."),
3928 &setprintlist
, &showprintlist
);
3930 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3931 &separate_debug_file_debug
, _("\
3932 Set printing of separate debug info file search debug."), _("\
3933 Show printing of separate debug info file search debug."), _("\
3934 When on, GDB prints the searched locations while looking for separate debug \
3935 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3938 selftests::register_test
3939 ("filename_language", selftests::filename_language::test_filename_language
);
3940 selftests::register_test
3941 ("set_ext_lang_command",
3942 selftests::filename_language::test_set_ext_lang_command
);