1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2019 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/readline.h"
49 #include "observable.h"
51 #include "parser-defs.h"
58 #include "cli/cli-utils.h"
59 #include "common/byte-vector.h"
60 #include "common/pathstuff.h"
61 #include "common/selftest.h"
62 #include "cli/cli-style.h"
63 #include "common/forward-scope-exit.h"
65 #include <sys/types.h>
74 int (*deprecated_ui_load_progress_hook
) (const char *section
,
76 void (*deprecated_show_load_progress
) (const char *section
,
77 unsigned long section_sent
,
78 unsigned long section_size
,
79 unsigned long total_sent
,
80 unsigned long total_size
);
81 void (*deprecated_pre_add_symbol_hook
) (const char *);
82 void (*deprecated_post_add_symbol_hook
) (void);
84 using clear_symtab_users_cleanup
85 = FORWARD_SCOPE_EXIT (clear_symtab_users
);
87 /* Global variables owned by this file. */
88 int readnow_symbol_files
; /* Read full symbols immediately. */
89 int readnever_symbol_files
; /* Never read full symbols. */
91 /* Functions this file defines. */
93 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
94 objfile_flags flags
, CORE_ADDR reloff
);
96 static const struct sym_fns
*find_sym_fns (bfd
*);
98 static void overlay_invalidate_all (void);
100 static void simple_free_overlay_table (void);
102 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
105 static int simple_read_overlay_table (void);
107 static int simple_overlay_update_1 (struct obj_section
*);
109 static void symfile_find_segment_sections (struct objfile
*objfile
);
111 /* List of all available sym_fns. On gdb startup, each object file reader
112 calls add_symtab_fns() to register information on each format it is
115 struct registered_sym_fns
117 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
118 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
121 /* BFD flavour that we handle. */
122 enum bfd_flavour sym_flavour
;
124 /* The "vtable" of symbol functions. */
125 const struct sym_fns
*sym_fns
;
128 static std::vector
<registered_sym_fns
> symtab_fns
;
130 /* Values for "set print symbol-loading". */
132 const char print_symbol_loading_off
[] = "off";
133 const char print_symbol_loading_brief
[] = "brief";
134 const char print_symbol_loading_full
[] = "full";
135 static const char *print_symbol_loading_enums
[] =
137 print_symbol_loading_off
,
138 print_symbol_loading_brief
,
139 print_symbol_loading_full
,
142 static const char *print_symbol_loading
= print_symbol_loading_full
;
144 /* If non-zero, shared library symbols will be added automatically
145 when the inferior is created, new libraries are loaded, or when
146 attaching to the inferior. This is almost always what users will
147 want to have happen; but for very large programs, the startup time
148 will be excessive, and so if this is a problem, the user can clear
149 this flag and then add the shared library symbols as needed. Note
150 that there is a potential for confusion, since if the shared
151 library symbols are not loaded, commands like "info fun" will *not*
152 report all the functions that are actually present. */
154 int auto_solib_add
= 1;
157 /* Return non-zero if symbol-loading messages should be printed.
158 FROM_TTY is the standard from_tty argument to gdb commands.
159 If EXEC is non-zero the messages are for the executable.
160 Otherwise, messages are for shared libraries.
161 If FULL is non-zero then the caller is printing a detailed message.
162 E.g., the message includes the shared library name.
163 Otherwise, the caller is printing a brief "summary" message. */
166 print_symbol_loading_p (int from_tty
, int exec
, int full
)
168 if (!from_tty
&& !info_verbose
)
173 /* We don't check FULL for executables, there are few such
174 messages, therefore brief == full. */
175 return print_symbol_loading
!= print_symbol_loading_off
;
178 return print_symbol_loading
== print_symbol_loading_full
;
179 return print_symbol_loading
== print_symbol_loading_brief
;
182 /* True if we are reading a symbol table. */
184 int currently_reading_symtab
= 0;
186 /* Increment currently_reading_symtab and return a cleanup that can be
187 used to decrement it. */
189 scoped_restore_tmpl
<int>
190 increment_reading_symtab (void)
192 gdb_assert (currently_reading_symtab
>= 0);
193 return make_scoped_restore (¤tly_reading_symtab
,
194 currently_reading_symtab
+ 1);
197 /* Remember the lowest-addressed loadable section we've seen.
198 This function is called via bfd_map_over_sections.
200 In case of equal vmas, the section with the largest size becomes the
201 lowest-addressed loadable section.
203 If the vmas and sizes are equal, the last section is considered the
204 lowest-addressed loadable section. */
207 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
209 asection
**lowest
= (asection
**) obj
;
211 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
214 *lowest
= sect
; /* First loadable section */
215 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
216 *lowest
= sect
; /* A lower loadable section */
217 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
218 && (bfd_section_size (abfd
, (*lowest
))
219 <= bfd_section_size (abfd
, sect
)))
223 /* Build (allocate and populate) a section_addr_info struct from
224 an existing section table. */
227 build_section_addr_info_from_section_table (const struct target_section
*start
,
228 const struct target_section
*end
)
230 const struct target_section
*stp
;
232 section_addr_info sap
;
234 for (stp
= start
; stp
!= end
; stp
++)
236 struct bfd_section
*asect
= stp
->the_bfd_section
;
237 bfd
*abfd
= asect
->owner
;
239 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
240 && sap
.size () < end
- start
)
241 sap
.emplace_back (stp
->addr
,
242 bfd_section_name (abfd
, asect
),
243 gdb_bfd_section_index (abfd
, asect
));
249 /* Create a section_addr_info from section offsets in ABFD. */
251 static section_addr_info
252 build_section_addr_info_from_bfd (bfd
*abfd
)
254 struct bfd_section
*sec
;
256 section_addr_info sap
;
257 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
258 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
259 sap
.emplace_back (bfd_get_section_vma (abfd
, sec
),
260 bfd_get_section_name (abfd
, sec
),
261 gdb_bfd_section_index (abfd
, sec
));
266 /* Create a section_addr_info from section offsets in OBJFILE. */
269 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
273 /* Before reread_symbols gets rewritten it is not safe to call:
274 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
276 section_addr_info sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
277 for (i
= 0; i
< sap
.size (); i
++)
279 int sectindex
= sap
[i
].sectindex
;
281 sap
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
286 /* Initialize OBJFILE's sect_index_* members. */
289 init_objfile_sect_indices (struct objfile
*objfile
)
294 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
296 objfile
->sect_index_text
= sect
->index
;
298 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
300 objfile
->sect_index_data
= sect
->index
;
302 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
304 objfile
->sect_index_bss
= sect
->index
;
306 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
308 objfile
->sect_index_rodata
= sect
->index
;
310 /* This is where things get really weird... We MUST have valid
311 indices for the various sect_index_* members or gdb will abort.
312 So if for example, there is no ".text" section, we have to
313 accomodate that. First, check for a file with the standard
314 one or two segments. */
316 symfile_find_segment_sections (objfile
);
318 /* Except when explicitly adding symbol files at some address,
319 section_offsets contains nothing but zeros, so it doesn't matter
320 which slot in section_offsets the individual sect_index_* members
321 index into. So if they are all zero, it is safe to just point
322 all the currently uninitialized indices to the first slot. But
323 beware: if this is the main executable, it may be relocated
324 later, e.g. by the remote qOffsets packet, and then this will
325 be wrong! That's why we try segments first. */
327 for (i
= 0; i
< objfile
->num_sections
; i
++)
329 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
334 if (i
== objfile
->num_sections
)
336 if (objfile
->sect_index_text
== -1)
337 objfile
->sect_index_text
= 0;
338 if (objfile
->sect_index_data
== -1)
339 objfile
->sect_index_data
= 0;
340 if (objfile
->sect_index_bss
== -1)
341 objfile
->sect_index_bss
= 0;
342 if (objfile
->sect_index_rodata
== -1)
343 objfile
->sect_index_rodata
= 0;
347 /* The arguments to place_section. */
349 struct place_section_arg
351 struct section_offsets
*offsets
;
355 /* Find a unique offset to use for loadable section SECT if
356 the user did not provide an offset. */
359 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
361 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
362 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
364 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
366 /* We are only interested in allocated sections. */
367 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
370 /* If the user specified an offset, honor it. */
371 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
374 /* Otherwise, let's try to find a place for the section. */
375 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
382 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
384 int indx
= cur_sec
->index
;
386 /* We don't need to compare against ourself. */
390 /* We can only conflict with allocated sections. */
391 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
394 /* If the section offset is 0, either the section has not been placed
395 yet, or it was the lowest section placed (in which case LOWEST
396 will be past its end). */
397 if (offsets
[indx
] == 0)
400 /* If this section would overlap us, then we must move up. */
401 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
402 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
404 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
405 start_addr
= (start_addr
+ align
- 1) & -align
;
410 /* Otherwise, we appear to be OK. So far. */
415 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
416 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
419 /* Store section_addr_info as prepared (made relative and with SECTINDEX
420 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
424 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
426 const section_addr_info
&addrs
)
430 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
432 /* Now calculate offsets for section that were specified by the caller. */
433 for (i
= 0; i
< addrs
.size (); i
++)
435 const struct other_sections
*osp
;
438 if (osp
->sectindex
== -1)
441 /* Record all sections in offsets. */
442 /* The section_offsets in the objfile are here filled in using
444 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
448 /* Transform section name S for a name comparison. prelink can split section
449 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
450 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
451 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
452 (`.sbss') section has invalid (increased) virtual address. */
455 addr_section_name (const char *s
)
457 if (strcmp (s
, ".dynbss") == 0)
459 if (strcmp (s
, ".sdynbss") == 0)
465 /* std::sort comparator for addrs_section_sort. Sort entries in
466 ascending order by their (name, sectindex) pair. sectindex makes
467 the sort by name stable. */
470 addrs_section_compar (const struct other_sections
*a
,
471 const struct other_sections
*b
)
475 retval
= strcmp (addr_section_name (a
->name
.c_str ()),
476 addr_section_name (b
->name
.c_str ()));
480 return a
->sectindex
< b
->sectindex
;
483 /* Provide sorted array of pointers to sections of ADDRS. */
485 static std::vector
<const struct other_sections
*>
486 addrs_section_sort (const section_addr_info
&addrs
)
490 std::vector
<const struct other_sections
*> array (addrs
.size ());
491 for (i
= 0; i
< addrs
.size (); i
++)
492 array
[i
] = &addrs
[i
];
494 std::sort (array
.begin (), array
.end (), addrs_section_compar
);
499 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
500 also SECTINDEXes specific to ABFD there. This function can be used to
501 rebase ADDRS to start referencing different BFD than before. */
504 addr_info_make_relative (section_addr_info
*addrs
, bfd
*abfd
)
506 asection
*lower_sect
;
507 CORE_ADDR lower_offset
;
510 /* Find lowest loadable section to be used as starting point for
511 continguous sections. */
513 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
514 if (lower_sect
== NULL
)
516 warning (_("no loadable sections found in added symbol-file %s"),
517 bfd_get_filename (abfd
));
521 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
523 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
524 in ABFD. Section names are not unique - there can be multiple sections of
525 the same name. Also the sections of the same name do not have to be
526 adjacent to each other. Some sections may be present only in one of the
527 files. Even sections present in both files do not have to be in the same
530 Use stable sort by name for the sections in both files. Then linearly
531 scan both lists matching as most of the entries as possible. */
533 std::vector
<const struct other_sections
*> addrs_sorted
534 = addrs_section_sort (*addrs
);
536 section_addr_info abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
537 std::vector
<const struct other_sections
*> abfd_addrs_sorted
538 = addrs_section_sort (abfd_addrs
);
540 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
541 ABFD_ADDRS_SORTED. */
543 std::vector
<const struct other_sections
*>
544 addrs_to_abfd_addrs (addrs
->size (), nullptr);
546 std::vector
<const struct other_sections
*>::iterator abfd_sorted_iter
547 = abfd_addrs_sorted
.begin ();
548 for (const other_sections
*sect
: addrs_sorted
)
550 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
552 while (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
553 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
557 if (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
558 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
563 /* Make the found item directly addressable from ADDRS. */
564 index_in_addrs
= sect
- addrs
->data ();
565 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
566 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_sorted_iter
;
568 /* Never use the same ABFD entry twice. */
573 /* Calculate offsets for the loadable sections.
574 FIXME! Sections must be in order of increasing loadable section
575 so that contiguous sections can use the lower-offset!!!
577 Adjust offsets if the segments are not contiguous.
578 If the section is contiguous, its offset should be set to
579 the offset of the highest loadable section lower than it
580 (the loadable section directly below it in memory).
581 this_offset = lower_offset = lower_addr - lower_orig_addr */
583 for (i
= 0; i
< addrs
->size (); i
++)
585 const struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
589 /* This is the index used by BFD. */
590 (*addrs
)[i
].sectindex
= sect
->sectindex
;
592 if ((*addrs
)[i
].addr
!= 0)
594 (*addrs
)[i
].addr
-= sect
->addr
;
595 lower_offset
= (*addrs
)[i
].addr
;
598 (*addrs
)[i
].addr
= lower_offset
;
602 /* addr_section_name transformation is not used for SECT_NAME. */
603 const std::string
§_name
= (*addrs
)[i
].name
;
605 /* This section does not exist in ABFD, which is normally
606 unexpected and we want to issue a warning.
608 However, the ELF prelinker does create a few sections which are
609 marked in the main executable as loadable (they are loaded in
610 memory from the DYNAMIC segment) and yet are not present in
611 separate debug info files. This is fine, and should not cause
612 a warning. Shared libraries contain just the section
613 ".gnu.liblist" but it is not marked as loadable there. There is
614 no other way to identify them than by their name as the sections
615 created by prelink have no special flags.
617 For the sections `.bss' and `.sbss' see addr_section_name. */
619 if (!(sect_name
== ".gnu.liblist"
620 || sect_name
== ".gnu.conflict"
621 || (sect_name
== ".bss"
623 && (*addrs
)[i
- 1].name
== ".dynbss"
624 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
625 || (sect_name
== ".sbss"
627 && (*addrs
)[i
- 1].name
== ".sdynbss"
628 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
629 warning (_("section %s not found in %s"), sect_name
.c_str (),
630 bfd_get_filename (abfd
));
632 (*addrs
)[i
].addr
= 0;
633 (*addrs
)[i
].sectindex
= -1;
638 /* Parse the user's idea of an offset for dynamic linking, into our idea
639 of how to represent it for fast symbol reading. This is the default
640 version of the sym_fns.sym_offsets function for symbol readers that
641 don't need to do anything special. It allocates a section_offsets table
642 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
645 default_symfile_offsets (struct objfile
*objfile
,
646 const section_addr_info
&addrs
)
648 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
649 objfile
->section_offsets
= (struct section_offsets
*)
650 obstack_alloc (&objfile
->objfile_obstack
,
651 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
652 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
653 objfile
->num_sections
, addrs
);
655 /* For relocatable files, all loadable sections will start at zero.
656 The zero is meaningless, so try to pick arbitrary addresses such
657 that no loadable sections overlap. This algorithm is quadratic,
658 but the number of sections in a single object file is generally
660 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
662 struct place_section_arg arg
;
663 bfd
*abfd
= objfile
->obfd
;
666 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
667 /* We do not expect this to happen; just skip this step if the
668 relocatable file has a section with an assigned VMA. */
669 if (bfd_section_vma (abfd
, cur_sec
) != 0)
674 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
676 /* Pick non-overlapping offsets for sections the user did not
678 arg
.offsets
= objfile
->section_offsets
;
680 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
682 /* Correctly filling in the section offsets is not quite
683 enough. Relocatable files have two properties that
684 (most) shared objects do not:
686 - Their debug information will contain relocations. Some
687 shared libraries do also, but many do not, so this can not
690 - If there are multiple code sections they will be loaded
691 at different relative addresses in memory than they are
692 in the objfile, since all sections in the file will start
695 Because GDB has very limited ability to map from an
696 address in debug info to the correct code section,
697 it relies on adding SECT_OFF_TEXT to things which might be
698 code. If we clear all the section offsets, and set the
699 section VMAs instead, then symfile_relocate_debug_section
700 will return meaningful debug information pointing at the
703 GDB has too many different data structures for section
704 addresses - a bfd, objfile, and so_list all have section
705 tables, as does exec_ops. Some of these could probably
708 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
709 cur_sec
= cur_sec
->next
)
711 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
714 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
715 exec_set_section_address (bfd_get_filename (abfd
),
717 offsets
[cur_sec
->index
]);
718 offsets
[cur_sec
->index
] = 0;
723 /* Remember the bfd indexes for the .text, .data, .bss and
725 init_objfile_sect_indices (objfile
);
728 /* Divide the file into segments, which are individual relocatable units.
729 This is the default version of the sym_fns.sym_segments function for
730 symbol readers that do not have an explicit representation of segments.
731 It assumes that object files do not have segments, and fully linked
732 files have a single segment. */
734 struct symfile_segment_data
*
735 default_symfile_segments (bfd
*abfd
)
739 struct symfile_segment_data
*data
;
742 /* Relocatable files contain enough information to position each
743 loadable section independently; they should not be relocated
745 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
748 /* Make sure there is at least one loadable section in the file. */
749 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
751 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
759 low
= bfd_get_section_vma (abfd
, sect
);
760 high
= low
+ bfd_get_section_size (sect
);
762 data
= XCNEW (struct symfile_segment_data
);
763 data
->num_segments
= 1;
764 data
->segment_bases
= XCNEW (CORE_ADDR
);
765 data
->segment_sizes
= XCNEW (CORE_ADDR
);
767 num_sections
= bfd_count_sections (abfd
);
768 data
->segment_info
= XCNEWVEC (int, num_sections
);
770 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
774 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
777 vma
= bfd_get_section_vma (abfd
, sect
);
780 if (vma
+ bfd_get_section_size (sect
) > high
)
781 high
= vma
+ bfd_get_section_size (sect
);
783 data
->segment_info
[i
] = 1;
786 data
->segment_bases
[0] = low
;
787 data
->segment_sizes
[0] = high
- low
;
792 /* This is a convenience function to call sym_read for OBJFILE and
793 possibly force the partial symbols to be read. */
796 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
798 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
799 objfile
->per_bfd
->minsyms_read
= true;
801 /* find_separate_debug_file_in_section should be called only if there is
802 single binary with no existing separate debug info file. */
803 if (!objfile_has_partial_symbols (objfile
)
804 && objfile
->separate_debug_objfile
== NULL
805 && objfile
->separate_debug_objfile_backlink
== NULL
)
807 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
811 /* find_separate_debug_file_in_section uses the same filename for the
812 virtual section-as-bfd like the bfd filename containing the
813 section. Therefore use also non-canonical name form for the same
814 file containing the section. */
815 symbol_file_add_separate (abfd
.get (),
816 bfd_get_filename (abfd
.get ()),
817 add_flags
| SYMFILE_NOT_FILENAME
, objfile
);
820 if ((add_flags
& SYMFILE_NO_READ
) == 0)
821 require_partial_symbols (objfile
, 0);
824 /* Initialize entry point information for this objfile. */
827 init_entry_point_info (struct objfile
*objfile
)
829 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
835 /* Save startup file's range of PC addresses to help blockframe.c
836 decide where the bottom of the stack is. */
838 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
840 /* Executable file -- record its entry point so we'll recognize
841 the startup file because it contains the entry point. */
842 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
843 ei
->entry_point_p
= 1;
845 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
846 && bfd_get_start_address (objfile
->obfd
) != 0)
848 /* Some shared libraries may have entry points set and be
849 runnable. There's no clear way to indicate this, so just check
850 for values other than zero. */
851 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
852 ei
->entry_point_p
= 1;
856 /* Examination of non-executable.o files. Short-circuit this stuff. */
857 ei
->entry_point_p
= 0;
860 if (ei
->entry_point_p
)
862 struct obj_section
*osect
;
863 CORE_ADDR entry_point
= ei
->entry_point
;
866 /* Make certain that the address points at real code, and not a
867 function descriptor. */
869 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
871 current_top_target ());
873 /* Remove any ISA markers, so that this matches entries in the
876 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
879 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
881 struct bfd_section
*sect
= osect
->the_bfd_section
;
883 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
884 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
885 + bfd_get_section_size (sect
)))
887 ei
->the_bfd_section_index
888 = gdb_bfd_section_index (objfile
->obfd
, sect
);
895 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
899 /* Process a symbol file, as either the main file or as a dynamically
902 This function does not set the OBJFILE's entry-point info.
904 OBJFILE is where the symbols are to be read from.
906 ADDRS is the list of section load addresses. If the user has given
907 an 'add-symbol-file' command, then this is the list of offsets and
908 addresses he or she provided as arguments to the command; or, if
909 we're handling a shared library, these are the actual addresses the
910 sections are loaded at, according to the inferior's dynamic linker
911 (as gleaned by GDB's shared library code). We convert each address
912 into an offset from the section VMA's as it appears in the object
913 file, and then call the file's sym_offsets function to convert this
914 into a format-specific offset table --- a `struct section_offsets'.
915 The sectindex field is used to control the ordering of sections
916 with the same name. Upon return, it is updated to contain the
917 correspondig BFD section index, or -1 if the section was not found.
919 ADD_FLAGS encodes verbosity level, whether this is main symbol or
920 an extra symbol file such as dynamically loaded code, and wether
921 breakpoint reset should be deferred. */
924 syms_from_objfile_1 (struct objfile
*objfile
,
925 section_addr_info
*addrs
,
926 symfile_add_flags add_flags
)
928 section_addr_info local_addr
;
929 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
931 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
933 if (objfile
->sf
== NULL
)
935 /* No symbols to load, but we still need to make sure
936 that the section_offsets table is allocated. */
937 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
938 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
940 objfile
->num_sections
= num_sections
;
941 objfile
->section_offsets
942 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
944 memset (objfile
->section_offsets
, 0, size
);
948 /* Make sure that partially constructed symbol tables will be cleaned up
949 if an error occurs during symbol reading. */
950 gdb::optional
<clear_symtab_users_cleanup
> defer_clear_users
;
952 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
954 /* If ADDRS is NULL, put together a dummy address list.
955 We now establish the convention that an addr of zero means
956 no load address was specified. */
962 /* We will modify the main symbol table, make sure that all its users
963 will be cleaned up if an error occurs during symbol reading. */
964 defer_clear_users
.emplace ((symfile_add_flag
) 0);
966 /* Since no error yet, throw away the old symbol table. */
968 if (symfile_objfile
!= NULL
)
970 delete symfile_objfile
;
971 gdb_assert (symfile_objfile
== NULL
);
974 /* Currently we keep symbols from the add-symbol-file command.
975 If the user wants to get rid of them, they should do "symbol-file"
976 without arguments first. Not sure this is the best behavior
979 (*objfile
->sf
->sym_new_init
) (objfile
);
982 /* Convert addr into an offset rather than an absolute address.
983 We find the lowest address of a loaded segment in the objfile,
984 and assume that <addr> is where that got loaded.
986 We no longer warn if the lowest section is not a text segment (as
987 happens for the PA64 port. */
988 if (addrs
->size () > 0)
989 addr_info_make_relative (addrs
, objfile
->obfd
);
991 /* Initialize symbol reading routines for this objfile, allow complaints to
992 appear for this new file, and record how verbose to be, then do the
993 initial symbol reading for this file. */
995 (*objfile
->sf
->sym_init
) (objfile
);
998 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
1000 read_symbols (objfile
, add_flags
);
1002 /* Discard cleanups as symbol reading was successful. */
1004 objfile_holder
.release ();
1005 if (defer_clear_users
)
1006 defer_clear_users
->release ();
1009 /* Same as syms_from_objfile_1, but also initializes the objfile
1010 entry-point info. */
1013 syms_from_objfile (struct objfile
*objfile
,
1014 section_addr_info
*addrs
,
1015 symfile_add_flags add_flags
)
1017 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1018 init_entry_point_info (objfile
);
1021 /* Perform required actions after either reading in the initial
1022 symbols for a new objfile, or mapping in the symbols from a reusable
1023 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1026 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1028 /* If this is the main symbol file we have to clean up all users of the
1029 old main symbol file. Otherwise it is sufficient to fixup all the
1030 breakpoints that may have been redefined by this symbol file. */
1031 if (add_flags
& SYMFILE_MAINLINE
)
1033 /* OK, make it the "real" symbol file. */
1034 symfile_objfile
= objfile
;
1036 clear_symtab_users (add_flags
);
1038 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1040 breakpoint_re_set ();
1043 /* We're done reading the symbol file; finish off complaints. */
1044 clear_complaints ();
1047 /* Process a symbol file, as either the main file or as a dynamically
1050 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1051 A new reference is acquired by this function.
1053 For NAME description see the objfile constructor.
1055 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1056 extra, such as dynamically loaded code, and what to do with breakpoins.
1058 ADDRS is as described for syms_from_objfile_1, above.
1059 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1061 PARENT is the original objfile if ABFD is a separate debug info file.
1062 Otherwise PARENT is NULL.
1064 Upon success, returns a pointer to the objfile that was added.
1065 Upon failure, jumps back to command level (never returns). */
1067 static struct objfile
*
1068 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1069 symfile_add_flags add_flags
,
1070 section_addr_info
*addrs
,
1071 objfile_flags flags
, struct objfile
*parent
)
1073 struct objfile
*objfile
;
1074 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1075 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1076 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1077 && (readnow_symbol_files
1078 || (add_flags
& SYMFILE_NO_READ
) == 0));
1080 if (readnow_symbol_files
)
1082 flags
|= OBJF_READNOW
;
1083 add_flags
&= ~SYMFILE_NO_READ
;
1085 else if (readnever_symbol_files
1086 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1088 flags
|= OBJF_READNEVER
;
1089 add_flags
|= SYMFILE_NO_READ
;
1091 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1092 flags
|= OBJF_NOT_FILENAME
;
1094 /* Give user a chance to burp if we'd be
1095 interactively wiping out any existing symbols. */
1097 if ((have_full_symbols () || have_partial_symbols ())
1100 && !query (_("Load new symbol table from \"%s\"? "), name
))
1101 error (_("Not confirmed."));
1104 flags
|= OBJF_MAINLINE
;
1105 objfile
= new struct objfile (abfd
, name
, flags
);
1108 add_separate_debug_objfile (objfile
, parent
);
1110 /* We either created a new mapped symbol table, mapped an existing
1111 symbol table file which has not had initial symbol reading
1112 performed, or need to read an unmapped symbol table. */
1115 if (deprecated_pre_add_symbol_hook
)
1116 deprecated_pre_add_symbol_hook (name
);
1119 puts_filtered (_("Reading symbols from "));
1120 fputs_styled (name
, file_name_style
.style (), gdb_stdout
);
1121 puts_filtered ("...\n");
1124 syms_from_objfile (objfile
, addrs
, add_flags
);
1126 /* We now have at least a partial symbol table. Check to see if the
1127 user requested that all symbols be read on initial access via either
1128 the gdb startup command line or on a per symbol file basis. Expand
1129 all partial symbol tables for this objfile if so. */
1131 if ((flags
& OBJF_READNOW
))
1134 printf_filtered (_("Expanding full symbols from %s...\n"), name
);
1137 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1140 /* Note that we only print a message if we have no symbols and have
1141 no separate debug file. If there is a separate debug file which
1142 does not have symbols, we'll have emitted this message for that
1143 file, and so printing it twice is just redundant. */
1144 if (should_print
&& !objfile_has_symbols (objfile
)
1145 && objfile
->separate_debug_objfile
== nullptr)
1146 printf_filtered (_("(No debugging symbols found in %s)\n"), name
);
1150 if (deprecated_post_add_symbol_hook
)
1151 deprecated_post_add_symbol_hook ();
1154 /* We print some messages regardless of whether 'from_tty ||
1155 info_verbose' is true, so make sure they go out at the right
1157 gdb_flush (gdb_stdout
);
1159 if (objfile
->sf
== NULL
)
1161 gdb::observers::new_objfile
.notify (objfile
);
1162 return objfile
; /* No symbols. */
1165 finish_new_objfile (objfile
, add_flags
);
1167 gdb::observers::new_objfile
.notify (objfile
);
1169 bfd_cache_close_all ();
1173 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1174 see the objfile constructor. */
1177 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1178 symfile_add_flags symfile_flags
,
1179 struct objfile
*objfile
)
1181 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1182 because sections of BFD may not match sections of OBJFILE and because
1183 vma may have been modified by tools such as prelink. */
1184 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1186 symbol_file_add_with_addrs
1187 (bfd
, name
, symfile_flags
, &sap
,
1188 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1193 /* Process the symbol file ABFD, as either the main file or as a
1194 dynamically loaded file.
1195 See symbol_file_add_with_addrs's comments for details. */
1198 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1199 symfile_add_flags add_flags
,
1200 section_addr_info
*addrs
,
1201 objfile_flags flags
, struct objfile
*parent
)
1203 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1207 /* Process a symbol file, as either the main file or as a dynamically
1208 loaded file. See symbol_file_add_with_addrs's comments for details. */
1211 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1212 section_addr_info
*addrs
, objfile_flags flags
)
1214 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1216 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1220 /* Call symbol_file_add() with default values and update whatever is
1221 affected by the loading of a new main().
1222 Used when the file is supplied in the gdb command line
1223 and by some targets with special loading requirements.
1224 The auxiliary function, symbol_file_add_main_1(), has the flags
1225 argument for the switches that can only be specified in the symbol_file
1229 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1231 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1235 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1236 objfile_flags flags
, CORE_ADDR reloff
)
1238 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1240 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1242 objfile_rebase (objfile
, reloff
);
1244 /* Getting new symbols may change our opinion about
1245 what is frameless. */
1246 reinit_frame_cache ();
1248 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1249 set_initial_language ();
1253 symbol_file_clear (int from_tty
)
1255 if ((have_full_symbols () || have_partial_symbols ())
1258 ? !query (_("Discard symbol table from `%s'? "),
1259 objfile_name (symfile_objfile
))
1260 : !query (_("Discard symbol table? "))))
1261 error (_("Not confirmed."));
1263 /* solib descriptors may have handles to objfiles. Wipe them before their
1264 objfiles get stale by free_all_objfiles. */
1265 no_shared_libraries (NULL
, from_tty
);
1267 free_all_objfiles ();
1269 gdb_assert (symfile_objfile
== NULL
);
1271 printf_filtered (_("No symbol file now.\n"));
1274 /* See symfile.h. */
1276 int separate_debug_file_debug
= 0;
1279 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1280 struct objfile
*parent_objfile
)
1282 unsigned long file_crc
;
1284 struct stat parent_stat
, abfd_stat
;
1285 int verified_as_different
;
1287 /* Find a separate debug info file as if symbols would be present in
1288 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1289 section can contain just the basename of PARENT_OBJFILE without any
1290 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1291 the separate debug infos with the same basename can exist. */
1293 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1296 if (separate_debug_file_debug
)
1298 printf_filtered (_(" Trying %s..."), name
.c_str ());
1299 gdb_flush (gdb_stdout
);
1302 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
, -1));
1306 if (separate_debug_file_debug
)
1307 printf_filtered (_(" no, unable to open.\n"));
1312 /* Verify symlinks were not the cause of filename_cmp name difference above.
1314 Some operating systems, e.g. Windows, do not provide a meaningful
1315 st_ino; they always set it to zero. (Windows does provide a
1316 meaningful st_dev.) Files accessed from gdbservers that do not
1317 support the vFile:fstat packet will also have st_ino set to zero.
1318 Do not indicate a duplicate library in either case. While there
1319 is no guarantee that a system that provides meaningful inode
1320 numbers will never set st_ino to zero, this is merely an
1321 optimization, so we do not need to worry about false negatives. */
1323 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1324 && abfd_stat
.st_ino
!= 0
1325 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1327 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1328 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1330 if (separate_debug_file_debug
)
1331 printf_filtered (_(" no, same file as the objfile.\n"));
1335 verified_as_different
= 1;
1338 verified_as_different
= 0;
1340 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1344 if (separate_debug_file_debug
)
1345 printf_filtered (_(" no, error computing CRC.\n"));
1350 if (crc
!= file_crc
)
1352 unsigned long parent_crc
;
1354 /* If the files could not be verified as different with
1355 bfd_stat then we need to calculate the parent's CRC
1356 to verify whether the files are different or not. */
1358 if (!verified_as_different
)
1360 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1362 if (separate_debug_file_debug
)
1363 printf_filtered (_(" no, error computing CRC.\n"));
1369 if (verified_as_different
|| parent_crc
!= file_crc
)
1370 warning (_("the debug information found in \"%s\""
1371 " does not match \"%s\" (CRC mismatch).\n"),
1372 name
.c_str (), objfile_name (parent_objfile
));
1374 if (separate_debug_file_debug
)
1375 printf_filtered (_(" no, CRC doesn't match.\n"));
1380 if (separate_debug_file_debug
)
1381 printf_filtered (_(" yes!\n"));
1386 char *debug_file_directory
= NULL
;
1388 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1389 struct cmd_list_element
*c
, const char *value
)
1391 fprintf_filtered (file
,
1392 _("The directory where separate debug "
1393 "symbols are searched for is \"%s\".\n"),
1397 #if ! defined (DEBUG_SUBDIRECTORY)
1398 #define DEBUG_SUBDIRECTORY ".debug"
1401 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1402 where the original file resides (may not be the same as
1403 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1404 looking for. CANON_DIR is the "realpath" form of DIR.
1405 DIR must contain a trailing '/'.
1406 Returns the path of the file with separate debug info, or an empty
1410 find_separate_debug_file (const char *dir
,
1411 const char *canon_dir
,
1412 const char *debuglink
,
1413 unsigned long crc32
, struct objfile
*objfile
)
1415 if (separate_debug_file_debug
)
1416 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1417 "%s\n"), objfile_name (objfile
));
1419 /* First try in the same directory as the original file. */
1420 std::string debugfile
= dir
;
1421 debugfile
+= debuglink
;
1423 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1426 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1428 debugfile
+= DEBUG_SUBDIRECTORY
;
1430 debugfile
+= debuglink
;
1432 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1435 /* Then try in the global debugfile directories.
1437 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1438 cause "/..." lookups. */
1440 bool target_prefix
= startswith (dir
, "target:");
1441 const char *dir_notarget
= target_prefix
? dir
+ strlen ("target:") : dir
;
1442 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1443 = dirnames_to_char_ptr_vec (debug_file_directory
);
1444 gdb::unique_xmalloc_ptr
<char> canon_sysroot
= gdb_realpath (gdb_sysroot
);
1446 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1448 debugfile
= target_prefix
? "target:" : "";
1449 debugfile
+= debugdir
.get ();
1451 debugfile
+= dir_notarget
;
1452 debugfile
+= debuglink
;
1454 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1457 const char *base_path
= NULL
;
1458 if (canon_dir
!= NULL
)
1460 if (canon_sysroot
.get () != NULL
)
1461 base_path
= child_path (canon_sysroot
.get (), canon_dir
);
1463 base_path
= child_path (gdb_sysroot
, canon_dir
);
1465 if (base_path
!= NULL
)
1467 /* If the file is in the sysroot, try using its base path in
1468 the global debugfile directory. */
1469 debugfile
= target_prefix
? "target:" : "";
1470 debugfile
+= debugdir
.get ();
1472 debugfile
+= base_path
;
1474 debugfile
+= debuglink
;
1476 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1479 /* If the file is in the sysroot, try using its base path in
1480 the sysroot's global debugfile directory. */
1481 debugfile
= target_prefix
? "target:" : "";
1482 debugfile
+= gdb_sysroot
;
1483 debugfile
+= debugdir
.get ();
1485 debugfile
+= base_path
;
1487 debugfile
+= debuglink
;
1489 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1495 return std::string ();
1498 /* Modify PATH to contain only "[/]directory/" part of PATH.
1499 If there were no directory separators in PATH, PATH will be empty
1500 string on return. */
1503 terminate_after_last_dir_separator (char *path
)
1507 /* Strip off the final filename part, leaving the directory name,
1508 followed by a slash. The directory can be relative or absolute. */
1509 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1510 if (IS_DIR_SEPARATOR (path
[i
]))
1513 /* If I is -1 then no directory is present there and DIR will be "". */
1517 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1518 Returns pathname, or an empty string. */
1521 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1523 unsigned long crc32
;
1525 gdb::unique_xmalloc_ptr
<char> debuglink
1526 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1528 if (debuglink
== NULL
)
1530 /* There's no separate debug info, hence there's no way we could
1531 load it => no warning. */
1532 return std::string ();
1535 std::string dir
= objfile_name (objfile
);
1536 terminate_after_last_dir_separator (&dir
[0]);
1537 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1539 std::string debugfile
1540 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1541 debuglink
.get (), crc32
, objfile
);
1543 if (debugfile
.empty ())
1545 /* For PR gdb/9538, try again with realpath (if different from the
1550 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1551 && S_ISLNK (st_buf
.st_mode
))
1553 gdb::unique_xmalloc_ptr
<char> symlink_dir
1554 (lrealpath (objfile_name (objfile
)));
1555 if (symlink_dir
!= NULL
)
1557 terminate_after_last_dir_separator (symlink_dir
.get ());
1558 if (dir
!= symlink_dir
.get ())
1560 /* Different directory, so try using it. */
1561 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1574 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1578 validate_readnow_readnever (objfile_flags flags
)
1580 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1581 error (_("-readnow and -readnever cannot be used simultaneously"));
1584 /* This is the symbol-file command. Read the file, analyze its
1585 symbols, and add a struct symtab to a symtab list. The syntax of
1586 the command is rather bizarre:
1588 1. The function buildargv implements various quoting conventions
1589 which are undocumented and have little or nothing in common with
1590 the way things are quoted (or not quoted) elsewhere in GDB.
1592 2. Options are used, which are not generally used in GDB (perhaps
1593 "set mapped on", "set readnow on" would be better)
1595 3. The order of options matters, which is contrary to GNU
1596 conventions (because it is confusing and inconvenient). */
1599 symbol_file_command (const char *args
, int from_tty
)
1605 symbol_file_clear (from_tty
);
1609 objfile_flags flags
= OBJF_USERLOADED
;
1610 symfile_add_flags add_flags
= 0;
1612 bool stop_processing_options
= false;
1613 CORE_ADDR offset
= 0;
1618 add_flags
|= SYMFILE_VERBOSE
;
1620 gdb_argv
built_argv (args
);
1621 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1623 if (stop_processing_options
|| *arg
!= '-')
1628 error (_("Unrecognized argument \"%s\""), arg
);
1630 else if (strcmp (arg
, "-readnow") == 0)
1631 flags
|= OBJF_READNOW
;
1632 else if (strcmp (arg
, "-readnever") == 0)
1633 flags
|= OBJF_READNEVER
;
1634 else if (strcmp (arg
, "-o") == 0)
1636 arg
= built_argv
[++idx
];
1638 error (_("Missing argument to -o"));
1640 offset
= parse_and_eval_address (arg
);
1642 else if (strcmp (arg
, "--") == 0)
1643 stop_processing_options
= true;
1645 error (_("Unrecognized argument \"%s\""), arg
);
1649 error (_("no symbol file name was specified"));
1651 validate_readnow_readnever (flags
);
1653 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1657 /* Set the initial language.
1659 FIXME: A better solution would be to record the language in the
1660 psymtab when reading partial symbols, and then use it (if known) to
1661 set the language. This would be a win for formats that encode the
1662 language in an easily discoverable place, such as DWARF. For
1663 stabs, we can jump through hoops looking for specially named
1664 symbols or try to intuit the language from the specific type of
1665 stabs we find, but we can't do that until later when we read in
1669 set_initial_language (void)
1671 enum language lang
= main_language ();
1673 if (lang
== language_unknown
)
1675 char *name
= main_name ();
1676 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1679 lang
= SYMBOL_LANGUAGE (sym
);
1682 if (lang
== language_unknown
)
1684 /* Make C the default language */
1688 set_language (lang
);
1689 expected_language
= current_language
; /* Don't warn the user. */
1692 /* Open the file specified by NAME and hand it off to BFD for
1693 preliminary analysis. Return a newly initialized bfd *, which
1694 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1695 absolute). In case of trouble, error() is called. */
1698 symfile_bfd_open (const char *name
)
1702 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1703 if (!is_target_filename (name
))
1705 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1707 /* Look down path for it, allocate 2nd new malloc'd copy. */
1708 desc
= openp (getenv ("PATH"),
1709 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1710 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1711 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1714 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1716 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1717 desc
= openp (getenv ("PATH"),
1718 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1719 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1723 perror_with_name (expanded_name
.get ());
1725 name
= absolute_name
.get ();
1728 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1729 if (sym_bfd
== NULL
)
1730 error (_("`%s': can't open to read symbols: %s."), name
,
1731 bfd_errmsg (bfd_get_error ()));
1733 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1734 bfd_set_cacheable (sym_bfd
.get (), 1);
1736 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1737 error (_("`%s': can't read symbols: %s."), name
,
1738 bfd_errmsg (bfd_get_error ()));
1743 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1744 the section was not found. */
1747 get_section_index (struct objfile
*objfile
, const char *section_name
)
1749 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1757 /* Link SF into the global symtab_fns list.
1758 FLAVOUR is the file format that SF handles.
1759 Called on startup by the _initialize routine in each object file format
1760 reader, to register information about each format the reader is prepared
1764 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1766 symtab_fns
.emplace_back (flavour
, sf
);
1769 /* Initialize OBJFILE to read symbols from its associated BFD. It
1770 either returns or calls error(). The result is an initialized
1771 struct sym_fns in the objfile structure, that contains cached
1772 information about the symbol file. */
1774 static const struct sym_fns
*
1775 find_sym_fns (bfd
*abfd
)
1777 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1779 if (our_flavour
== bfd_target_srec_flavour
1780 || our_flavour
== bfd_target_ihex_flavour
1781 || our_flavour
== bfd_target_tekhex_flavour
)
1782 return NULL
; /* No symbols. */
1784 for (const registered_sym_fns
&rsf
: symtab_fns
)
1785 if (our_flavour
== rsf
.sym_flavour
)
1788 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1789 bfd_get_target (abfd
));
1793 /* This function runs the load command of our current target. */
1796 load_command (const char *arg
, int from_tty
)
1800 /* The user might be reloading because the binary has changed. Take
1801 this opportunity to check. */
1802 reopen_exec_file ();
1808 const char *parg
, *prev
;
1810 arg
= get_exec_file (1);
1812 /* We may need to quote this string so buildargv can pull it
1815 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1817 temp
.append (prev
, parg
- prev
);
1819 temp
.push_back ('\\');
1821 /* If we have not copied anything yet, then we didn't see a
1822 character to quote, and we can just leave ARG unchanged. */
1826 arg
= temp
.c_str ();
1830 target_load (arg
, from_tty
);
1832 /* After re-loading the executable, we don't really know which
1833 overlays are mapped any more. */
1834 overlay_cache_invalid
= 1;
1837 /* This version of "load" should be usable for any target. Currently
1838 it is just used for remote targets, not inftarg.c or core files,
1839 on the theory that only in that case is it useful.
1841 Avoiding xmodem and the like seems like a win (a) because we don't have
1842 to worry about finding it, and (b) On VMS, fork() is very slow and so
1843 we don't want to run a subprocess. On the other hand, I'm not sure how
1844 performance compares. */
1846 static int validate_download
= 0;
1848 /* Callback service function for generic_load (bfd_map_over_sections). */
1851 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1853 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1855 *sum
+= bfd_get_section_size (asec
);
1858 /* Opaque data for load_progress. */
1859 struct load_progress_data
1861 /* Cumulative data. */
1862 unsigned long write_count
= 0;
1863 unsigned long data_count
= 0;
1864 bfd_size_type total_size
= 0;
1867 /* Opaque data for load_progress for a single section. */
1868 struct load_progress_section_data
1870 load_progress_section_data (load_progress_data
*cumulative_
,
1871 const char *section_name_
, ULONGEST section_size_
,
1872 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1873 : cumulative (cumulative_
), section_name (section_name_
),
1874 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1877 struct load_progress_data
*cumulative
;
1879 /* Per-section data. */
1880 const char *section_name
;
1881 ULONGEST section_sent
= 0;
1882 ULONGEST section_size
;
1887 /* Opaque data for load_section_callback. */
1888 struct load_section_data
1890 load_section_data (load_progress_data
*progress_data_
)
1891 : progress_data (progress_data_
)
1894 ~load_section_data ()
1896 for (auto &&request
: requests
)
1898 xfree (request
.data
);
1899 delete ((load_progress_section_data
*) request
.baton
);
1903 CORE_ADDR load_offset
= 0;
1904 struct load_progress_data
*progress_data
;
1905 std::vector
<struct memory_write_request
> requests
;
1908 /* Target write callback routine for progress reporting. */
1911 load_progress (ULONGEST bytes
, void *untyped_arg
)
1913 struct load_progress_section_data
*args
1914 = (struct load_progress_section_data
*) untyped_arg
;
1915 struct load_progress_data
*totals
;
1918 /* Writing padding data. No easy way to get at the cumulative
1919 stats, so just ignore this. */
1922 totals
= args
->cumulative
;
1924 if (bytes
== 0 && args
->section_sent
== 0)
1926 /* The write is just starting. Let the user know we've started
1928 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1930 hex_string (args
->section_size
),
1931 paddress (target_gdbarch (), args
->lma
));
1935 if (validate_download
)
1937 /* Broken memories and broken monitors manifest themselves here
1938 when bring new computers to life. This doubles already slow
1940 /* NOTE: cagney/1999-10-18: A more efficient implementation
1941 might add a verify_memory() method to the target vector and
1942 then use that. remote.c could implement that method using
1943 the ``qCRC'' packet. */
1944 gdb::byte_vector
check (bytes
);
1946 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1947 error (_("Download verify read failed at %s"),
1948 paddress (target_gdbarch (), args
->lma
));
1949 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1950 error (_("Download verify compare failed at %s"),
1951 paddress (target_gdbarch (), args
->lma
));
1953 totals
->data_count
+= bytes
;
1955 args
->buffer
+= bytes
;
1956 totals
->write_count
+= 1;
1957 args
->section_sent
+= bytes
;
1958 if (check_quit_flag ()
1959 || (deprecated_ui_load_progress_hook
!= NULL
1960 && deprecated_ui_load_progress_hook (args
->section_name
,
1961 args
->section_sent
)))
1962 error (_("Canceled the download"));
1964 if (deprecated_show_load_progress
!= NULL
)
1965 deprecated_show_load_progress (args
->section_name
,
1969 totals
->total_size
);
1972 /* Callback service function for generic_load (bfd_map_over_sections). */
1975 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1977 struct load_section_data
*args
= (struct load_section_data
*) data
;
1978 bfd_size_type size
= bfd_get_section_size (asec
);
1979 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1981 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1987 ULONGEST begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1988 ULONGEST end
= begin
+ size
;
1989 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1990 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1992 load_progress_section_data
*section_data
1993 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
1996 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
1999 static void print_transfer_performance (struct ui_file
*stream
,
2000 unsigned long data_count
,
2001 unsigned long write_count
,
2002 std::chrono::steady_clock::duration d
);
2005 generic_load (const char *args
, int from_tty
)
2007 struct load_progress_data total_progress
;
2008 struct load_section_data
cbdata (&total_progress
);
2009 struct ui_out
*uiout
= current_uiout
;
2012 error_no_arg (_("file to load"));
2014 gdb_argv
argv (args
);
2016 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2018 if (argv
[1] != NULL
)
2022 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2024 /* If the last word was not a valid number then
2025 treat it as a file name with spaces in. */
2026 if (argv
[1] == endptr
)
2027 error (_("Invalid download offset:%s."), argv
[1]);
2029 if (argv
[2] != NULL
)
2030 error (_("Too many parameters."));
2033 /* Open the file for loading. */
2034 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2035 if (loadfile_bfd
== NULL
)
2036 perror_with_name (filename
.get ());
2038 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2040 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2041 bfd_errmsg (bfd_get_error ()));
2044 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2045 (void *) &total_progress
.total_size
);
2047 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2049 using namespace std::chrono
;
2051 steady_clock::time_point start_time
= steady_clock::now ();
2053 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2054 load_progress
) != 0)
2055 error (_("Load failed"));
2057 steady_clock::time_point end_time
= steady_clock::now ();
2059 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2060 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2061 uiout
->text ("Start address ");
2062 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2063 uiout
->text (", load size ");
2064 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2066 regcache_write_pc (get_current_regcache (), entry
);
2068 /* Reset breakpoints, now that we have changed the load image. For
2069 instance, breakpoints may have been set (or reset, by
2070 post_create_inferior) while connected to the target but before we
2071 loaded the program. In that case, the prologue analyzer could
2072 have read instructions from the target to find the right
2073 breakpoint locations. Loading has changed the contents of that
2076 breakpoint_re_set ();
2078 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2079 total_progress
.write_count
,
2080 end_time
- start_time
);
2083 /* Report on STREAM the performance of a memory transfer operation,
2084 such as 'load'. DATA_COUNT is the number of bytes transferred.
2085 WRITE_COUNT is the number of separate write operations, or 0, if
2086 that information is not available. TIME is how long the operation
2090 print_transfer_performance (struct ui_file
*stream
,
2091 unsigned long data_count
,
2092 unsigned long write_count
,
2093 std::chrono::steady_clock::duration time
)
2095 using namespace std::chrono
;
2096 struct ui_out
*uiout
= current_uiout
;
2098 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2100 uiout
->text ("Transfer rate: ");
2101 if (ms
.count () > 0)
2103 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2105 if (uiout
->is_mi_like_p ())
2107 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2108 uiout
->text (" bits/sec");
2110 else if (rate
< 1024)
2112 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2113 uiout
->text (" bytes/sec");
2117 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2118 uiout
->text (" KB/sec");
2123 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2124 uiout
->text (" bits in <1 sec");
2126 if (write_count
> 0)
2129 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2130 uiout
->text (" bytes/write");
2132 uiout
->text (".\n");
2135 /* Add an OFFSET to the start address of each section in OBJF, except
2136 sections that were specified in ADDRS. */
2139 set_objfile_default_section_offset (struct objfile
*objf
,
2140 const section_addr_info
&addrs
,
2143 /* Add OFFSET to all sections by default. */
2144 std::vector
<struct section_offsets
> offsets (objf
->num_sections
,
2147 /* Create sorted lists of all sections in ADDRS as well as all
2148 sections in OBJF. */
2150 std::vector
<const struct other_sections
*> addrs_sorted
2151 = addrs_section_sort (addrs
);
2153 section_addr_info objf_addrs
2154 = build_section_addr_info_from_objfile (objf
);
2155 std::vector
<const struct other_sections
*> objf_addrs_sorted
2156 = addrs_section_sort (objf_addrs
);
2158 /* Walk the BFD section list, and if a matching section is found in
2159 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2162 Note that both lists may contain multiple sections with the same
2163 name, and then the sections from ADDRS are matched in BFD order
2164 (thanks to sectindex). */
2166 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2167 = addrs_sorted
.begin ();
2168 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2170 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2173 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2175 const struct other_sections
*sect
= *addrs_sorted_iter
;
2176 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2177 cmp
= strcmp (sect_name
, objf_name
);
2179 ++addrs_sorted_iter
;
2183 offsets
[objf_sect
->sectindex
].offsets
[0] = 0;
2186 /* Apply the new section offsets. */
2187 objfile_relocate (objf
, offsets
.data ());
2190 /* This function allows the addition of incrementally linked object files.
2191 It does not modify any state in the target, only in the debugger. */
2192 /* Note: ezannoni 2000-04-13 This function/command used to have a
2193 special case syntax for the rombug target (Rombug is the boot
2194 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2195 rombug case, the user doesn't need to supply a text address,
2196 instead a call to target_link() (in target.c) would supply the
2197 value to use. We are now discontinuing this type of ad hoc syntax. */
2200 add_symbol_file_command (const char *args
, int from_tty
)
2202 struct gdbarch
*gdbarch
= get_current_arch ();
2203 gdb::unique_xmalloc_ptr
<char> filename
;
2206 struct objfile
*objf
;
2207 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2208 symfile_add_flags add_flags
= 0;
2211 add_flags
|= SYMFILE_VERBOSE
;
2219 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2220 bool stop_processing_options
= false;
2221 CORE_ADDR offset
= 0;
2226 error (_("add-symbol-file takes a file name and an address"));
2228 bool seen_addr
= false;
2229 bool seen_offset
= false;
2230 gdb_argv
argv (args
);
2232 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2234 if (stop_processing_options
|| *arg
!= '-')
2236 if (filename
== NULL
)
2238 /* First non-option argument is always the filename. */
2239 filename
.reset (tilde_expand (arg
));
2241 else if (!seen_addr
)
2243 /* The second non-option argument is always the text
2244 address at which to load the program. */
2245 sect_opts
[0].value
= arg
;
2249 error (_("Unrecognized argument \"%s\""), arg
);
2251 else if (strcmp (arg
, "-readnow") == 0)
2252 flags
|= OBJF_READNOW
;
2253 else if (strcmp (arg
, "-readnever") == 0)
2254 flags
|= OBJF_READNEVER
;
2255 else if (strcmp (arg
, "-s") == 0)
2257 if (argv
[argcnt
+ 1] == NULL
)
2258 error (_("Missing section name after \"-s\""));
2259 else if (argv
[argcnt
+ 2] == NULL
)
2260 error (_("Missing section address after \"-s\""));
2262 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2264 sect_opts
.push_back (sect
);
2267 else if (strcmp (arg
, "-o") == 0)
2269 arg
= argv
[++argcnt
];
2271 error (_("Missing argument to -o"));
2273 offset
= parse_and_eval_address (arg
);
2276 else if (strcmp (arg
, "--") == 0)
2277 stop_processing_options
= true;
2279 error (_("Unrecognized argument \"%s\""), arg
);
2282 if (filename
== NULL
)
2283 error (_("You must provide a filename to be loaded."));
2285 validate_readnow_readnever (flags
);
2287 /* Print the prompt for the query below. And save the arguments into
2288 a sect_addr_info structure to be passed around to other
2289 functions. We have to split this up into separate print
2290 statements because hex_string returns a local static
2293 printf_unfiltered (_("add symbol table from file \"%s\""),
2295 section_addr_info section_addrs
;
2296 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2299 for (; it
!= sect_opts
.end (); ++it
)
2302 const char *val
= it
->value
;
2303 const char *sec
= it
->name
;
2305 if (section_addrs
.empty ())
2306 printf_unfiltered (_(" at\n"));
2307 addr
= parse_and_eval_address (val
);
2309 /* Here we store the section offsets in the order they were
2310 entered on the command line. Every array element is
2311 assigned an ascending section index to preserve the above
2312 order over an unstable sorting algorithm. This dummy
2313 index is not used for any other purpose.
2315 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2316 printf_filtered ("\t%s_addr = %s\n", sec
,
2317 paddress (gdbarch
, addr
));
2319 /* The object's sections are initialized when a
2320 call is made to build_objfile_section_table (objfile).
2321 This happens in reread_symbols.
2322 At this point, we don't know what file type this is,
2323 so we can't determine what section names are valid. */
2326 printf_unfiltered (_("%s offset by %s\n"),
2327 (section_addrs
.empty ()
2328 ? _(" with all sections")
2329 : _("with other sections")),
2330 paddress (gdbarch
, offset
));
2331 else if (section_addrs
.empty ())
2332 printf_unfiltered ("\n");
2334 if (from_tty
&& (!query ("%s", "")))
2335 error (_("Not confirmed."));
2337 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2341 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2343 add_target_sections_of_objfile (objf
);
2345 /* Getting new symbols may change our opinion about what is
2347 reinit_frame_cache ();
2351 /* This function removes a symbol file that was added via add-symbol-file. */
2354 remove_symbol_file_command (const char *args
, int from_tty
)
2356 struct objfile
*objf
= NULL
;
2357 struct program_space
*pspace
= current_program_space
;
2362 error (_("remove-symbol-file: no symbol file provided"));
2364 gdb_argv
argv (args
);
2366 if (strcmp (argv
[0], "-a") == 0)
2368 /* Interpret the next argument as an address. */
2371 if (argv
[1] == NULL
)
2372 error (_("Missing address argument"));
2374 if (argv
[2] != NULL
)
2375 error (_("Junk after %s"), argv
[1]);
2377 addr
= parse_and_eval_address (argv
[1]);
2379 for (objfile
*objfile
: current_program_space
->objfiles ())
2381 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2382 && (objfile
->flags
& OBJF_SHARED
) != 0
2383 && objfile
->pspace
== pspace
2384 && is_addr_in_objfile (addr
, objfile
))
2391 else if (argv
[0] != NULL
)
2393 /* Interpret the current argument as a file name. */
2395 if (argv
[1] != NULL
)
2396 error (_("Junk after %s"), argv
[0]);
2398 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2400 for (objfile
*objfile
: current_program_space
->objfiles ())
2402 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2403 && (objfile
->flags
& OBJF_SHARED
) != 0
2404 && objfile
->pspace
== pspace
2405 && filename_cmp (filename
.get (), objfile_name (objfile
)) == 0)
2414 error (_("No symbol file found"));
2417 && !query (_("Remove symbol table from file \"%s\"? "),
2418 objfile_name (objf
)))
2419 error (_("Not confirmed."));
2422 clear_symtab_users (0);
2425 /* Re-read symbols if a symbol-file has changed. */
2428 reread_symbols (void)
2430 struct objfile
*objfile
;
2432 struct stat new_statbuf
;
2434 std::vector
<struct objfile
*> new_objfiles
;
2436 /* With the addition of shared libraries, this should be modified,
2437 the load time should be saved in the partial symbol tables, since
2438 different tables may come from different source files. FIXME.
2439 This routine should then walk down each partial symbol table
2440 and see if the symbol table that it originates from has been changed. */
2442 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2444 if (objfile
->obfd
== NULL
)
2447 /* Separate debug objfiles are handled in the main objfile. */
2448 if (objfile
->separate_debug_objfile_backlink
)
2451 /* If this object is from an archive (what you usually create with
2452 `ar', often called a `static library' on most systems, though
2453 a `shared library' on AIX is also an archive), then you should
2454 stat on the archive name, not member name. */
2455 if (objfile
->obfd
->my_archive
)
2456 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2458 res
= stat (objfile_name (objfile
), &new_statbuf
);
2461 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2462 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2463 objfile_name (objfile
));
2466 new_modtime
= new_statbuf
.st_mtime
;
2467 if (new_modtime
!= objfile
->mtime
)
2469 struct section_offsets
*offsets
;
2472 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2473 objfile_name (objfile
));
2475 /* There are various functions like symbol_file_add,
2476 symfile_bfd_open, syms_from_objfile, etc., which might
2477 appear to do what we want. But they have various other
2478 effects which we *don't* want. So we just do stuff
2479 ourselves. We don't worry about mapped files (for one thing,
2480 any mapped file will be out of date). */
2482 /* If we get an error, blow away this objfile (not sure if
2483 that is the correct response for things like shared
2485 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
2487 /* We need to do this whenever any symbols go away. */
2488 clear_symtab_users_cleanup
defer_clear_users (0);
2490 if (exec_bfd
!= NULL
2491 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2492 bfd_get_filename (exec_bfd
)) == 0)
2494 /* Reload EXEC_BFD without asking anything. */
2496 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2499 /* Keep the calls order approx. the same as in free_objfile. */
2501 /* Free the separate debug objfiles. It will be
2502 automatically recreated by sym_read. */
2503 free_objfile_separate_debug (objfile
);
2505 /* Remove any references to this objfile in the global
2507 preserve_values (objfile
);
2509 /* Nuke all the state that we will re-read. Much of the following
2510 code which sets things to NULL really is necessary to tell
2511 other parts of GDB that there is nothing currently there.
2513 Try to keep the freeing order compatible with free_objfile. */
2515 if (objfile
->sf
!= NULL
)
2517 (*objfile
->sf
->sym_finish
) (objfile
);
2520 clear_objfile_data (objfile
);
2522 /* Clean up any state BFD has sitting around. */
2524 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2525 char *obfd_filename
;
2527 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2528 /* Open the new BFD before freeing the old one, so that
2529 the filename remains live. */
2530 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2531 objfile
->obfd
= temp
.release ();
2532 if (objfile
->obfd
== NULL
)
2533 error (_("Can't open %s to read symbols."), obfd_filename
);
2536 std::string original_name
= objfile
->original_name
;
2538 /* bfd_openr sets cacheable to true, which is what we want. */
2539 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2540 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2541 bfd_errmsg (bfd_get_error ()));
2543 /* Save the offsets, we will nuke them with the rest of the
2545 num_offsets
= objfile
->num_sections
;
2546 offsets
= ((struct section_offsets
*)
2547 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2548 memcpy (offsets
, objfile
->section_offsets
,
2549 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2551 objfile
->reset_psymtabs ();
2553 /* NB: after this call to obstack_free, objfiles_changed
2554 will need to be called (see discussion below). */
2555 obstack_free (&objfile
->objfile_obstack
, 0);
2556 objfile
->sections
= NULL
;
2557 objfile
->compunit_symtabs
= NULL
;
2558 objfile
->template_symbols
= NULL
;
2559 objfile
->static_links
= NULL
;
2561 /* obstack_init also initializes the obstack so it is
2562 empty. We could use obstack_specify_allocation but
2563 gdb_obstack.h specifies the alloc/dealloc functions. */
2564 obstack_init (&objfile
->objfile_obstack
);
2566 /* set_objfile_per_bfd potentially allocates the per-bfd
2567 data on the objfile's obstack (if sharing data across
2568 multiple users is not possible), so it's important to
2569 do it *after* the obstack has been initialized. */
2570 set_objfile_per_bfd (objfile
);
2572 objfile
->original_name
2573 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
2574 original_name
.c_str (),
2575 original_name
.size ());
2577 /* Reset the sym_fns pointer. The ELF reader can change it
2578 based on whether .gdb_index is present, and we need it to
2579 start over. PR symtab/15885 */
2580 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2582 build_objfile_section_table (objfile
);
2584 /* We use the same section offsets as from last time. I'm not
2585 sure whether that is always correct for shared libraries. */
2586 objfile
->section_offsets
= (struct section_offsets
*)
2587 obstack_alloc (&objfile
->objfile_obstack
,
2588 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2589 memcpy (objfile
->section_offsets
, offsets
,
2590 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2591 objfile
->num_sections
= num_offsets
;
2593 /* What the hell is sym_new_init for, anyway? The concept of
2594 distinguishing between the main file and additional files
2595 in this way seems rather dubious. */
2596 if (objfile
== symfile_objfile
)
2598 (*objfile
->sf
->sym_new_init
) (objfile
);
2601 (*objfile
->sf
->sym_init
) (objfile
);
2602 clear_complaints ();
2604 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2606 /* We are about to read new symbols and potentially also
2607 DWARF information. Some targets may want to pass addresses
2608 read from DWARF DIE's through an adjustment function before
2609 saving them, like MIPS, which may call into
2610 "find_pc_section". When called, that function will make
2611 use of per-objfile program space data.
2613 Since we discarded our section information above, we have
2614 dangling pointers in the per-objfile program space data
2615 structure. Force GDB to update the section mapping
2616 information by letting it know the objfile has changed,
2617 making the dangling pointers point to correct data
2620 objfiles_changed ();
2622 read_symbols (objfile
, 0);
2624 if (!objfile_has_symbols (objfile
))
2627 printf_filtered (_("(no debugging symbols found)\n"));
2631 /* We're done reading the symbol file; finish off complaints. */
2632 clear_complaints ();
2634 /* Getting new symbols may change our opinion about what is
2637 reinit_frame_cache ();
2639 /* Discard cleanups as symbol reading was successful. */
2640 objfile_holder
.release ();
2641 defer_clear_users
.release ();
2643 /* If the mtime has changed between the time we set new_modtime
2644 and now, we *want* this to be out of date, so don't call stat
2646 objfile
->mtime
= new_modtime
;
2647 init_entry_point_info (objfile
);
2649 new_objfiles
.push_back (objfile
);
2653 if (!new_objfiles
.empty ())
2655 clear_symtab_users (0);
2657 /* clear_objfile_data for each objfile was called before freeing it and
2658 gdb::observers::new_objfile.notify (NULL) has been called by
2659 clear_symtab_users above. Notify the new files now. */
2660 for (auto iter
: new_objfiles
)
2661 gdb::observers::new_objfile
.notify (iter
);
2663 /* At least one objfile has changed, so we can consider that
2664 the executable we're debugging has changed too. */
2665 gdb::observers::executable_changed
.notify ();
2670 struct filename_language
2672 filename_language (const std::string
&ext_
, enum language lang_
)
2673 : ext (ext_
), lang (lang_
)
2680 static std::vector
<filename_language
> filename_language_table
;
2682 /* See symfile.h. */
2685 add_filename_language (const char *ext
, enum language lang
)
2687 filename_language_table
.emplace_back (ext
, lang
);
2690 static char *ext_args
;
2692 show_ext_args (struct ui_file
*file
, int from_tty
,
2693 struct cmd_list_element
*c
, const char *value
)
2695 fprintf_filtered (file
,
2696 _("Mapping between filename extension "
2697 "and source language is \"%s\".\n"),
2702 set_ext_lang_command (const char *args
,
2703 int from_tty
, struct cmd_list_element
*e
)
2705 char *cp
= ext_args
;
2708 /* First arg is filename extension, starting with '.' */
2710 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2712 /* Find end of first arg. */
2713 while (*cp
&& !isspace (*cp
))
2717 error (_("'%s': two arguments required -- "
2718 "filename extension and language"),
2721 /* Null-terminate first arg. */
2724 /* Find beginning of second arg, which should be a source language. */
2725 cp
= skip_spaces (cp
);
2728 error (_("'%s': two arguments required -- "
2729 "filename extension and language"),
2732 /* Lookup the language from among those we know. */
2733 lang
= language_enum (cp
);
2735 auto it
= filename_language_table
.begin ();
2736 /* Now lookup the filename extension: do we already know it? */
2737 for (; it
!= filename_language_table
.end (); it
++)
2739 if (it
->ext
== ext_args
)
2743 if (it
== filename_language_table
.end ())
2745 /* New file extension. */
2746 add_filename_language (ext_args
, lang
);
2750 /* Redefining a previously known filename extension. */
2753 /* query ("Really make files of type %s '%s'?", */
2754 /* ext_args, language_str (lang)); */
2761 info_ext_lang_command (const char *args
, int from_tty
)
2763 printf_filtered (_("Filename extensions and the languages they represent:"));
2764 printf_filtered ("\n\n");
2765 for (const filename_language
&entry
: filename_language_table
)
2766 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2767 language_str (entry
.lang
));
2771 deduce_language_from_filename (const char *filename
)
2775 if (filename
!= NULL
)
2776 if ((cp
= strrchr (filename
, '.')) != NULL
)
2778 for (const filename_language
&entry
: filename_language_table
)
2779 if (entry
.ext
== cp
)
2783 return language_unknown
;
2786 /* Allocate and initialize a new symbol table.
2787 CUST is from the result of allocate_compunit_symtab. */
2790 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2792 struct objfile
*objfile
= cust
->objfile
;
2793 struct symtab
*symtab
2794 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2797 = ((const char *) objfile
->per_bfd
->filename_cache
.insert
2798 (filename
, strlen (filename
) + 1));
2799 symtab
->fullname
= NULL
;
2800 symtab
->language
= deduce_language_from_filename (filename
);
2802 /* This can be very verbose with lots of headers.
2803 Only print at higher debug levels. */
2804 if (symtab_create_debug
>= 2)
2806 /* Be a bit clever with debugging messages, and don't print objfile
2807 every time, only when it changes. */
2808 static char *last_objfile_name
= NULL
;
2810 if (last_objfile_name
== NULL
2811 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2813 xfree (last_objfile_name
);
2814 last_objfile_name
= xstrdup (objfile_name (objfile
));
2815 fprintf_filtered (gdb_stdlog
,
2816 "Creating one or more symtabs for objfile %s ...\n",
2819 fprintf_filtered (gdb_stdlog
,
2820 "Created symtab %s for module %s.\n",
2821 host_address_to_string (symtab
), filename
);
2824 /* Add it to CUST's list of symtabs. */
2825 if (cust
->filetabs
== NULL
)
2827 cust
->filetabs
= symtab
;
2828 cust
->last_filetab
= symtab
;
2832 cust
->last_filetab
->next
= symtab
;
2833 cust
->last_filetab
= symtab
;
2836 /* Backlink to the containing compunit symtab. */
2837 symtab
->compunit_symtab
= cust
;
2842 /* Allocate and initialize a new compunit.
2843 NAME is the name of the main source file, if there is one, or some
2844 descriptive text if there are no source files. */
2846 struct compunit_symtab
*
2847 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2849 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2850 struct compunit_symtab
);
2851 const char *saved_name
;
2853 cu
->objfile
= objfile
;
2855 /* The name we record here is only for display/debugging purposes.
2856 Just save the basename to avoid path issues (too long for display,
2857 relative vs absolute, etc.). */
2858 saved_name
= lbasename (name
);
2860 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2861 strlen (saved_name
));
2863 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2865 if (symtab_create_debug
)
2867 fprintf_filtered (gdb_stdlog
,
2868 "Created compunit symtab %s for %s.\n",
2869 host_address_to_string (cu
),
2876 /* Hook CU to the objfile it comes from. */
2879 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2881 cu
->next
= cu
->objfile
->compunit_symtabs
;
2882 cu
->objfile
->compunit_symtabs
= cu
;
2886 /* Reset all data structures in gdb which may contain references to
2887 symbol table data. */
2890 clear_symtab_users (symfile_add_flags add_flags
)
2892 /* Someday, we should do better than this, by only blowing away
2893 the things that really need to be blown. */
2895 /* Clear the "current" symtab first, because it is no longer valid.
2896 breakpoint_re_set may try to access the current symtab. */
2897 clear_current_source_symtab_and_line ();
2900 clear_last_displayed_sal ();
2901 clear_pc_function_cache ();
2902 gdb::observers::new_objfile
.notify (NULL
);
2904 /* Clear globals which might have pointed into a removed objfile.
2905 FIXME: It's not clear which of these are supposed to persist
2906 between expressions and which ought to be reset each time. */
2907 expression_context_block
= NULL
;
2908 innermost_block
.reset ();
2910 /* Varobj may refer to old symbols, perform a cleanup. */
2911 varobj_invalidate ();
2913 /* Now that the various caches have been cleared, we can re_set
2914 our breakpoints without risking it using stale data. */
2915 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2916 breakpoint_re_set ();
2920 The following code implements an abstraction for debugging overlay sections.
2922 The target model is as follows:
2923 1) The gnu linker will permit multiple sections to be mapped into the
2924 same VMA, each with its own unique LMA (or load address).
2925 2) It is assumed that some runtime mechanism exists for mapping the
2926 sections, one by one, from the load address into the VMA address.
2927 3) This code provides a mechanism for gdb to keep track of which
2928 sections should be considered to be mapped from the VMA to the LMA.
2929 This information is used for symbol lookup, and memory read/write.
2930 For instance, if a section has been mapped then its contents
2931 should be read from the VMA, otherwise from the LMA.
2933 Two levels of debugger support for overlays are available. One is
2934 "manual", in which the debugger relies on the user to tell it which
2935 overlays are currently mapped. This level of support is
2936 implemented entirely in the core debugger, and the information about
2937 whether a section is mapped is kept in the objfile->obj_section table.
2939 The second level of support is "automatic", and is only available if
2940 the target-specific code provides functionality to read the target's
2941 overlay mapping table, and translate its contents for the debugger
2942 (by updating the mapped state information in the obj_section tables).
2944 The interface is as follows:
2946 overlay map <name> -- tell gdb to consider this section mapped
2947 overlay unmap <name> -- tell gdb to consider this section unmapped
2948 overlay list -- list the sections that GDB thinks are mapped
2949 overlay read-target -- get the target's state of what's mapped
2950 overlay off/manual/auto -- set overlay debugging state
2951 Functional interface:
2952 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2953 section, return that section.
2954 find_pc_overlay(pc): find any overlay section that contains
2955 the pc, either in its VMA or its LMA
2956 section_is_mapped(sect): true if overlay is marked as mapped
2957 section_is_overlay(sect): true if section's VMA != LMA
2958 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2959 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2960 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2961 overlay_mapped_address(...): map an address from section's LMA to VMA
2962 overlay_unmapped_address(...): map an address from section's VMA to LMA
2963 symbol_overlayed_address(...): Return a "current" address for symbol:
2964 either in VMA or LMA depending on whether
2965 the symbol's section is currently mapped. */
2967 /* Overlay debugging state: */
2969 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2970 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2972 /* Function: section_is_overlay (SECTION)
2973 Returns true if SECTION has VMA not equal to LMA, ie.
2974 SECTION is loaded at an address different from where it will "run". */
2977 section_is_overlay (struct obj_section
*section
)
2979 if (overlay_debugging
&& section
)
2981 asection
*bfd_section
= section
->the_bfd_section
;
2983 if (bfd_section_lma (abfd
, bfd_section
) != 0
2984 && bfd_section_lma (abfd
, bfd_section
)
2985 != bfd_section_vma (abfd
, bfd_section
))
2992 /* Function: overlay_invalidate_all (void)
2993 Invalidate the mapped state of all overlay sections (mark it as stale). */
2996 overlay_invalidate_all (void)
2998 struct obj_section
*sect
;
3000 for (objfile
*objfile
: current_program_space
->objfiles ())
3001 ALL_OBJFILE_OSECTIONS (objfile
, sect
)
3002 if (section_is_overlay (sect
))
3003 sect
->ovly_mapped
= -1;
3006 /* Function: section_is_mapped (SECTION)
3007 Returns true if section is an overlay, and is currently mapped.
3009 Access to the ovly_mapped flag is restricted to this function, so
3010 that we can do automatic update. If the global flag
3011 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3012 overlay_invalidate_all. If the mapped state of the particular
3013 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3016 section_is_mapped (struct obj_section
*osect
)
3018 struct gdbarch
*gdbarch
;
3020 if (osect
== 0 || !section_is_overlay (osect
))
3023 switch (overlay_debugging
)
3027 return 0; /* overlay debugging off */
3028 case ovly_auto
: /* overlay debugging automatic */
3029 /* Unles there is a gdbarch_overlay_update function,
3030 there's really nothing useful to do here (can't really go auto). */
3031 gdbarch
= get_objfile_arch (osect
->objfile
);
3032 if (gdbarch_overlay_update_p (gdbarch
))
3034 if (overlay_cache_invalid
)
3036 overlay_invalidate_all ();
3037 overlay_cache_invalid
= 0;
3039 if (osect
->ovly_mapped
== -1)
3040 gdbarch_overlay_update (gdbarch
, osect
);
3043 case ovly_on
: /* overlay debugging manual */
3044 return osect
->ovly_mapped
== 1;
3048 /* Function: pc_in_unmapped_range
3049 If PC falls into the lma range of SECTION, return true, else false. */
3052 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3054 if (section_is_overlay (section
))
3056 bfd
*abfd
= section
->objfile
->obfd
;
3057 asection
*bfd_section
= section
->the_bfd_section
;
3059 /* We assume the LMA is relocated by the same offset as the VMA. */
3060 bfd_vma size
= bfd_get_section_size (bfd_section
);
3061 CORE_ADDR offset
= obj_section_offset (section
);
3063 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3064 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3071 /* Function: pc_in_mapped_range
3072 If PC falls into the vma range of SECTION, return true, else false. */
3075 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3077 if (section_is_overlay (section
))
3079 if (obj_section_addr (section
) <= pc
3080 && pc
< obj_section_endaddr (section
))
3087 /* Return true if the mapped ranges of sections A and B overlap, false
3091 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3093 CORE_ADDR a_start
= obj_section_addr (a
);
3094 CORE_ADDR a_end
= obj_section_endaddr (a
);
3095 CORE_ADDR b_start
= obj_section_addr (b
);
3096 CORE_ADDR b_end
= obj_section_endaddr (b
);
3098 return (a_start
< b_end
&& b_start
< a_end
);
3101 /* Function: overlay_unmapped_address (PC, SECTION)
3102 Returns the address corresponding to PC in the unmapped (load) range.
3103 May be the same as PC. */
3106 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3108 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3110 asection
*bfd_section
= section
->the_bfd_section
;
3112 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3113 - bfd_section_vma (abfd
, bfd_section
);
3119 /* Function: overlay_mapped_address (PC, SECTION)
3120 Returns the address corresponding to PC in the mapped (runtime) range.
3121 May be the same as PC. */
3124 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3126 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3128 asection
*bfd_section
= section
->the_bfd_section
;
3130 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3131 - bfd_section_lma (abfd
, bfd_section
);
3137 /* Function: symbol_overlayed_address
3138 Return one of two addresses (relative to the VMA or to the LMA),
3139 depending on whether the section is mapped or not. */
3142 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3144 if (overlay_debugging
)
3146 /* If the symbol has no section, just return its regular address. */
3149 /* If the symbol's section is not an overlay, just return its
3151 if (!section_is_overlay (section
))
3153 /* If the symbol's section is mapped, just return its address. */
3154 if (section_is_mapped (section
))
3157 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3158 * then return its LOADED address rather than its vma address!!
3160 return overlay_unmapped_address (address
, section
);
3165 /* Function: find_pc_overlay (PC)
3166 Return the best-match overlay section for PC:
3167 If PC matches a mapped overlay section's VMA, return that section.
3168 Else if PC matches an unmapped section's VMA, return that section.
3169 Else if PC matches an unmapped section's LMA, return that section. */
3171 struct obj_section
*
3172 find_pc_overlay (CORE_ADDR pc
)
3174 struct obj_section
*osect
, *best_match
= NULL
;
3176 if (overlay_debugging
)
3178 for (objfile
*objfile
: current_program_space
->objfiles ())
3179 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3180 if (section_is_overlay (osect
))
3182 if (pc_in_mapped_range (pc
, osect
))
3184 if (section_is_mapped (osect
))
3189 else if (pc_in_unmapped_range (pc
, osect
))
3196 /* Function: find_pc_mapped_section (PC)
3197 If PC falls into the VMA address range of an overlay section that is
3198 currently marked as MAPPED, return that section. Else return NULL. */
3200 struct obj_section
*
3201 find_pc_mapped_section (CORE_ADDR pc
)
3203 struct obj_section
*osect
;
3205 if (overlay_debugging
)
3207 for (objfile
*objfile
: current_program_space
->objfiles ())
3208 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3209 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3216 /* Function: list_overlays_command
3217 Print a list of mapped sections and their PC ranges. */
3220 list_overlays_command (const char *args
, int from_tty
)
3223 struct obj_section
*osect
;
3225 if (overlay_debugging
)
3227 for (objfile
*objfile
: current_program_space
->objfiles ())
3228 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3229 if (section_is_mapped (osect
))
3231 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3236 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3237 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3238 size
= bfd_get_section_size (osect
->the_bfd_section
);
3239 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3241 printf_filtered ("Section %s, loaded at ", name
);
3242 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3243 puts_filtered (" - ");
3244 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3245 printf_filtered (", mapped at ");
3246 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3247 puts_filtered (" - ");
3248 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3249 puts_filtered ("\n");
3255 printf_filtered (_("No sections are mapped.\n"));
3258 /* Function: map_overlay_command
3259 Mark the named section as mapped (ie. residing at its VMA address). */
3262 map_overlay_command (const char *args
, int from_tty
)
3264 struct obj_section
*sec
, *sec2
;
3266 if (!overlay_debugging
)
3267 error (_("Overlay debugging not enabled. Use "
3268 "either the 'overlay auto' or\n"
3269 "the 'overlay manual' command."));
3271 if (args
== 0 || *args
== 0)
3272 error (_("Argument required: name of an overlay section"));
3274 /* First, find a section matching the user supplied argument. */
3275 for (objfile
*obj_file
: current_program_space
->objfiles ())
3276 ALL_OBJFILE_OSECTIONS (obj_file
, sec
)
3277 if (!strcmp (bfd_section_name (obj_file
->obfd
, sec
->the_bfd_section
),
3280 /* Now, check to see if the section is an overlay. */
3281 if (!section_is_overlay (sec
))
3282 continue; /* not an overlay section */
3284 /* Mark the overlay as "mapped". */
3285 sec
->ovly_mapped
= 1;
3287 /* Next, make a pass and unmap any sections that are
3288 overlapped by this new section: */
3289 for (objfile
*objfile2
: current_program_space
->objfiles ())
3290 ALL_OBJFILE_OSECTIONS (objfile2
, sec2
)
3291 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
,
3295 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3296 bfd_section_name (obj_file
->obfd
,
3297 sec2
->the_bfd_section
));
3298 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3302 error (_("No overlay section called %s"), args
);
3305 /* Function: unmap_overlay_command
3306 Mark the overlay section as unmapped
3307 (ie. resident in its LMA address range, rather than the VMA range). */
3310 unmap_overlay_command (const char *args
, int from_tty
)
3312 struct obj_section
*sec
= NULL
;
3314 if (!overlay_debugging
)
3315 error (_("Overlay debugging not enabled. "
3316 "Use either the 'overlay auto' or\n"
3317 "the 'overlay manual' command."));
3319 if (args
== 0 || *args
== 0)
3320 error (_("Argument required: name of an overlay section"));
3322 /* First, find a section matching the user supplied argument. */
3323 for (objfile
*objfile
: current_program_space
->objfiles ())
3324 ALL_OBJFILE_OSECTIONS (objfile
, sec
)
3325 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3327 if (!sec
->ovly_mapped
)
3328 error (_("Section %s is not mapped"), args
);
3329 sec
->ovly_mapped
= 0;
3332 error (_("No overlay section called %s"), args
);
3335 /* Function: overlay_auto_command
3336 A utility command to turn on overlay debugging.
3337 Possibly this should be done via a set/show command. */
3340 overlay_auto_command (const char *args
, int from_tty
)
3342 overlay_debugging
= ovly_auto
;
3343 enable_overlay_breakpoints ();
3345 printf_unfiltered (_("Automatic overlay debugging enabled."));
3348 /* Function: overlay_manual_command
3349 A utility command to turn on overlay debugging.
3350 Possibly this should be done via a set/show command. */
3353 overlay_manual_command (const char *args
, int from_tty
)
3355 overlay_debugging
= ovly_on
;
3356 disable_overlay_breakpoints ();
3358 printf_unfiltered (_("Overlay debugging enabled."));
3361 /* Function: overlay_off_command
3362 A utility command to turn on overlay debugging.
3363 Possibly this should be done via a set/show command. */
3366 overlay_off_command (const char *args
, int from_tty
)
3368 overlay_debugging
= ovly_off
;
3369 disable_overlay_breakpoints ();
3371 printf_unfiltered (_("Overlay debugging disabled."));
3375 overlay_load_command (const char *args
, int from_tty
)
3377 struct gdbarch
*gdbarch
= get_current_arch ();
3379 if (gdbarch_overlay_update_p (gdbarch
))
3380 gdbarch_overlay_update (gdbarch
, NULL
);
3382 error (_("This target does not know how to read its overlay state."));
3385 /* Function: overlay_command
3386 A place-holder for a mis-typed command. */
3388 /* Command list chain containing all defined "overlay" subcommands. */
3389 static struct cmd_list_element
*overlaylist
;
3392 overlay_command (const char *args
, int from_tty
)
3395 ("\"overlay\" must be followed by the name of an overlay command.\n");
3396 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3399 /* Target Overlays for the "Simplest" overlay manager:
3401 This is GDB's default target overlay layer. It works with the
3402 minimal overlay manager supplied as an example by Cygnus. The
3403 entry point is via a function pointer "gdbarch_overlay_update",
3404 so targets that use a different runtime overlay manager can
3405 substitute their own overlay_update function and take over the
3408 The overlay_update function pokes around in the target's data structures
3409 to see what overlays are mapped, and updates GDB's overlay mapping with
3412 In this simple implementation, the target data structures are as follows:
3413 unsigned _novlys; /# number of overlay sections #/
3414 unsigned _ovly_table[_novlys][4] = {
3415 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3416 {..., ..., ..., ...},
3418 unsigned _novly_regions; /# number of overlay regions #/
3419 unsigned _ovly_region_table[_novly_regions][3] = {
3420 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3423 These functions will attempt to update GDB's mappedness state in the
3424 symbol section table, based on the target's mappedness state.
3426 To do this, we keep a cached copy of the target's _ovly_table, and
3427 attempt to detect when the cached copy is invalidated. The main
3428 entry point is "simple_overlay_update(SECT), which looks up SECT in
3429 the cached table and re-reads only the entry for that section from
3430 the target (whenever possible). */
3432 /* Cached, dynamically allocated copies of the target data structures: */
3433 static unsigned (*cache_ovly_table
)[4] = 0;
3434 static unsigned cache_novlys
= 0;
3435 static CORE_ADDR cache_ovly_table_base
= 0;
3438 VMA
, OSIZE
, LMA
, MAPPED
3441 /* Throw away the cached copy of _ovly_table. */
3444 simple_free_overlay_table (void)
3446 if (cache_ovly_table
)
3447 xfree (cache_ovly_table
);
3449 cache_ovly_table
= NULL
;
3450 cache_ovly_table_base
= 0;
3453 /* Read an array of ints of size SIZE from the target into a local buffer.
3454 Convert to host order. int LEN is number of ints. */
3457 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3458 int len
, int size
, enum bfd_endian byte_order
)
3460 /* FIXME (alloca): Not safe if array is very large. */
3461 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3464 read_memory (memaddr
, buf
, len
* size
);
3465 for (i
= 0; i
< len
; i
++)
3466 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3469 /* Find and grab a copy of the target _ovly_table
3470 (and _novlys, which is needed for the table's size). */
3473 simple_read_overlay_table (void)
3475 struct bound_minimal_symbol novlys_msym
;
3476 struct bound_minimal_symbol ovly_table_msym
;
3477 struct gdbarch
*gdbarch
;
3479 enum bfd_endian byte_order
;
3481 simple_free_overlay_table ();
3482 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3483 if (! novlys_msym
.minsym
)
3485 error (_("Error reading inferior's overlay table: "
3486 "couldn't find `_novlys' variable\n"
3487 "in inferior. Use `overlay manual' mode."));
3491 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3492 if (! ovly_table_msym
.minsym
)
3494 error (_("Error reading inferior's overlay table: couldn't find "
3495 "`_ovly_table' array\n"
3496 "in inferior. Use `overlay manual' mode."));
3500 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3501 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3502 byte_order
= gdbarch_byte_order (gdbarch
);
3504 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3507 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3508 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3509 read_target_long_array (cache_ovly_table_base
,
3510 (unsigned int *) cache_ovly_table
,
3511 cache_novlys
* 4, word_size
, byte_order
);
3513 return 1; /* SUCCESS */
3516 /* Function: simple_overlay_update_1
3517 A helper function for simple_overlay_update. Assuming a cached copy
3518 of _ovly_table exists, look through it to find an entry whose vma,
3519 lma and size match those of OSECT. Re-read the entry and make sure
3520 it still matches OSECT (else the table may no longer be valid).
3521 Set OSECT's mapped state to match the entry. Return: 1 for
3522 success, 0 for failure. */
3525 simple_overlay_update_1 (struct obj_section
*osect
)
3528 asection
*bsect
= osect
->the_bfd_section
;
3529 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3530 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3531 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3533 for (i
= 0; i
< cache_novlys
; i
++)
3534 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3535 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3537 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3538 (unsigned int *) cache_ovly_table
[i
],
3539 4, word_size
, byte_order
);
3540 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3541 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3543 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3546 else /* Warning! Warning! Target's ovly table has changed! */
3552 /* Function: simple_overlay_update
3553 If OSECT is NULL, then update all sections' mapped state
3554 (after re-reading the entire target _ovly_table).
3555 If OSECT is non-NULL, then try to find a matching entry in the
3556 cached ovly_table and update only OSECT's mapped state.
3557 If a cached entry can't be found or the cache isn't valid, then
3558 re-read the entire cache, and go ahead and update all sections. */
3561 simple_overlay_update (struct obj_section
*osect
)
3563 /* Were we given an osect to look up? NULL means do all of them. */
3565 /* Have we got a cached copy of the target's overlay table? */
3566 if (cache_ovly_table
!= NULL
)
3568 /* Does its cached location match what's currently in the
3570 struct bound_minimal_symbol minsym
3571 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3573 if (minsym
.minsym
== NULL
)
3574 error (_("Error reading inferior's overlay table: couldn't "
3575 "find `_ovly_table' array\n"
3576 "in inferior. Use `overlay manual' mode."));
3578 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3579 /* Then go ahead and try to look up this single section in
3581 if (simple_overlay_update_1 (osect
))
3582 /* Found it! We're done. */
3586 /* Cached table no good: need to read the entire table anew.
3587 Or else we want all the sections, in which case it's actually
3588 more efficient to read the whole table in one block anyway. */
3590 if (! simple_read_overlay_table ())
3593 /* Now may as well update all sections, even if only one was requested. */
3594 for (objfile
*objfile
: current_program_space
->objfiles ())
3595 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3596 if (section_is_overlay (osect
))
3599 asection
*bsect
= osect
->the_bfd_section
;
3601 for (i
= 0; i
< cache_novlys
; i
++)
3602 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3603 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3604 { /* obj_section matches i'th entry in ovly_table. */
3605 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3606 break; /* finished with inner for loop: break out. */
3611 /* Set the output sections and output offsets for section SECTP in
3612 ABFD. The relocation code in BFD will read these offsets, so we
3613 need to be sure they're initialized. We map each section to itself,
3614 with no offset; this means that SECTP->vma will be honored. */
3617 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3619 sectp
->output_section
= sectp
;
3620 sectp
->output_offset
= 0;
3623 /* Default implementation for sym_relocate. */
3626 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3629 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3631 bfd
*abfd
= sectp
->owner
;
3633 /* We're only interested in sections with relocation
3635 if ((sectp
->flags
& SEC_RELOC
) == 0)
3638 /* We will handle section offsets properly elsewhere, so relocate as if
3639 all sections begin at 0. */
3640 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3642 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3645 /* Relocate the contents of a debug section SECTP in ABFD. The
3646 contents are stored in BUF if it is non-NULL, or returned in a
3647 malloc'd buffer otherwise.
3649 For some platforms and debug info formats, shared libraries contain
3650 relocations against the debug sections (particularly for DWARF-2;
3651 one affected platform is PowerPC GNU/Linux, although it depends on
3652 the version of the linker in use). Also, ELF object files naturally
3653 have unresolved relocations for their debug sections. We need to apply
3654 the relocations in order to get the locations of symbols correct.
3655 Another example that may require relocation processing, is the
3656 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3660 symfile_relocate_debug_section (struct objfile
*objfile
,
3661 asection
*sectp
, bfd_byte
*buf
)
3663 gdb_assert (objfile
->sf
->sym_relocate
);
3665 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3668 struct symfile_segment_data
*
3669 get_symfile_segment_data (bfd
*abfd
)
3671 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3676 return sf
->sym_segments (abfd
);
3680 free_symfile_segment_data (struct symfile_segment_data
*data
)
3682 xfree (data
->segment_bases
);
3683 xfree (data
->segment_sizes
);
3684 xfree (data
->segment_info
);
3689 - DATA, containing segment addresses from the object file ABFD, and
3690 the mapping from ABFD's sections onto the segments that own them,
3692 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3693 segment addresses reported by the target,
3694 store the appropriate offsets for each section in OFFSETS.
3696 If there are fewer entries in SEGMENT_BASES than there are segments
3697 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3699 If there are more entries, then ignore the extra. The target may
3700 not be able to distinguish between an empty data segment and a
3701 missing data segment; a missing text segment is less plausible. */
3704 symfile_map_offsets_to_segments (bfd
*abfd
,
3705 const struct symfile_segment_data
*data
,
3706 struct section_offsets
*offsets
,
3707 int num_segment_bases
,
3708 const CORE_ADDR
*segment_bases
)
3713 /* It doesn't make sense to call this function unless you have some
3714 segment base addresses. */
3715 gdb_assert (num_segment_bases
> 0);
3717 /* If we do not have segment mappings for the object file, we
3718 can not relocate it by segments. */
3719 gdb_assert (data
!= NULL
);
3720 gdb_assert (data
->num_segments
> 0);
3722 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3724 int which
= data
->segment_info
[i
];
3726 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3728 /* Don't bother computing offsets for sections that aren't
3729 loaded as part of any segment. */
3733 /* Use the last SEGMENT_BASES entry as the address of any extra
3734 segments mentioned in DATA->segment_info. */
3735 if (which
> num_segment_bases
)
3736 which
= num_segment_bases
;
3738 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3739 - data
->segment_bases
[which
- 1]);
3746 symfile_find_segment_sections (struct objfile
*objfile
)
3748 bfd
*abfd
= objfile
->obfd
;
3751 struct symfile_segment_data
*data
;
3753 data
= get_symfile_segment_data (objfile
->obfd
);
3757 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3759 free_symfile_segment_data (data
);
3763 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3765 int which
= data
->segment_info
[i
];
3769 if (objfile
->sect_index_text
== -1)
3770 objfile
->sect_index_text
= sect
->index
;
3772 if (objfile
->sect_index_rodata
== -1)
3773 objfile
->sect_index_rodata
= sect
->index
;
3775 else if (which
== 2)
3777 if (objfile
->sect_index_data
== -1)
3778 objfile
->sect_index_data
= sect
->index
;
3780 if (objfile
->sect_index_bss
== -1)
3781 objfile
->sect_index_bss
= sect
->index
;
3785 free_symfile_segment_data (data
);
3788 /* Listen for free_objfile events. */
3791 symfile_free_objfile (struct objfile
*objfile
)
3793 /* Remove the target sections owned by this objfile. */
3794 if (objfile
!= NULL
)
3795 remove_target_sections ((void *) objfile
);
3798 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3799 Expand all symtabs that match the specified criteria.
3800 See quick_symbol_functions.expand_symtabs_matching for details. */
3803 expand_symtabs_matching
3804 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3805 const lookup_name_info
&lookup_name
,
3806 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3807 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3808 enum search_domain kind
)
3810 for (objfile
*objfile
: current_program_space
->objfiles ())
3813 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3816 expansion_notify
, kind
);
3820 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3821 Map function FUN over every file.
3822 See quick_symbol_functions.map_symbol_filenames for details. */
3825 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3828 for (objfile
*objfile
: current_program_space
->objfiles ())
3831 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3838 namespace selftests
{
3839 namespace filename_language
{
3841 static void test_filename_language ()
3843 /* This test messes up the filename_language_table global. */
3844 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3846 /* Test deducing an unknown extension. */
3847 language lang
= deduce_language_from_filename ("myfile.blah");
3848 SELF_CHECK (lang
== language_unknown
);
3850 /* Test deducing a known extension. */
3851 lang
= deduce_language_from_filename ("myfile.c");
3852 SELF_CHECK (lang
== language_c
);
3854 /* Test adding a new extension using the internal API. */
3855 add_filename_language (".blah", language_pascal
);
3856 lang
= deduce_language_from_filename ("myfile.blah");
3857 SELF_CHECK (lang
== language_pascal
);
3861 test_set_ext_lang_command ()
3863 /* This test messes up the filename_language_table global. */
3864 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3866 /* Confirm that the .hello extension is not known. */
3867 language lang
= deduce_language_from_filename ("cake.hello");
3868 SELF_CHECK (lang
== language_unknown
);
3870 /* Test adding a new extension using the CLI command. */
3871 gdb::unique_xmalloc_ptr
<char> args_holder (xstrdup (".hello rust"));
3872 ext_args
= args_holder
.get ();
3873 set_ext_lang_command (NULL
, 1, NULL
);
3875 lang
= deduce_language_from_filename ("cake.hello");
3876 SELF_CHECK (lang
== language_rust
);
3878 /* Test overriding an existing extension using the CLI command. */
3879 int size_before
= filename_language_table
.size ();
3880 args_holder
.reset (xstrdup (".hello pascal"));
3881 ext_args
= args_holder
.get ();
3882 set_ext_lang_command (NULL
, 1, NULL
);
3883 int size_after
= filename_language_table
.size ();
3885 lang
= deduce_language_from_filename ("cake.hello");
3886 SELF_CHECK (lang
== language_pascal
);
3887 SELF_CHECK (size_before
== size_after
);
3890 } /* namespace filename_language */
3891 } /* namespace selftests */
3893 #endif /* GDB_SELF_TEST */
3896 _initialize_symfile (void)
3898 struct cmd_list_element
*c
;
3900 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3902 #define READNOW_READNEVER_HELP \
3903 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3904 immediately. This makes the command slower, but may make future operations\n\
3906 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3907 symbolic debug information."
3909 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3910 Load symbol table from executable file FILE.\n\
3911 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3912 OFF is an optional offset which is added to each section address.\n\
3913 The `file' command can also load symbol tables, as well as setting the file\n\
3914 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3915 set_cmd_completer (c
, filename_completer
);
3917 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3918 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3919 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3920 [-s SECT-NAME SECT-ADDR]...\n\
3921 ADDR is the starting address of the file's text.\n\
3922 Each '-s' argument provides a section name and address, and\n\
3923 should be specified if the data and bss segments are not contiguous\n\
3924 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3925 OFF is an optional offset which is added to the default load addresses\n\
3926 of all sections for which no other address was specified.\n"
3927 READNOW_READNEVER_HELP
),
3929 set_cmd_completer (c
, filename_completer
);
3931 c
= add_cmd ("remove-symbol-file", class_files
,
3932 remove_symbol_file_command
, _("\
3933 Remove a symbol file added via the add-symbol-file command.\n\
3934 Usage: remove-symbol-file FILENAME\n\
3935 remove-symbol-file -a ADDRESS\n\
3936 The file to remove can be identified by its filename or by an address\n\
3937 that lies within the boundaries of this symbol file in memory."),
3940 c
= add_cmd ("load", class_files
, load_command
, _("\
3941 Dynamically load FILE into the running program, and record its symbols\n\
3942 for access from GDB.\n\
3943 Usage: load [FILE] [OFFSET]\n\
3944 An optional load OFFSET may also be given as a literal address.\n\
3945 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3946 on its own."), &cmdlist
);
3947 set_cmd_completer (c
, filename_completer
);
3949 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3950 _("Commands for debugging overlays."), &overlaylist
,
3951 "overlay ", 0, &cmdlist
);
3953 add_com_alias ("ovly", "overlay", class_alias
, 1);
3954 add_com_alias ("ov", "overlay", class_alias
, 1);
3956 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3957 _("Assert that an overlay section is mapped."), &overlaylist
);
3959 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3960 _("Assert that an overlay section is unmapped."), &overlaylist
);
3962 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3963 _("List mappings of overlay sections."), &overlaylist
);
3965 add_cmd ("manual", class_support
, overlay_manual_command
,
3966 _("Enable overlay debugging."), &overlaylist
);
3967 add_cmd ("off", class_support
, overlay_off_command
,
3968 _("Disable overlay debugging."), &overlaylist
);
3969 add_cmd ("auto", class_support
, overlay_auto_command
,
3970 _("Enable automatic overlay debugging."), &overlaylist
);
3971 add_cmd ("load-target", class_support
, overlay_load_command
,
3972 _("Read the overlay mapping state from the target."), &overlaylist
);
3974 /* Filename extension to source language lookup table: */
3975 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3977 Set mapping between filename extension and source language."), _("\
3978 Show mapping between filename extension and source language."), _("\
3979 Usage: set extension-language .foo bar"),
3980 set_ext_lang_command
,
3982 &setlist
, &showlist
);
3984 add_info ("extensions", info_ext_lang_command
,
3985 _("All filename extensions associated with a source language."));
3987 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3988 &debug_file_directory
, _("\
3989 Set the directories where separate debug symbols are searched for."), _("\
3990 Show the directories where separate debug symbols are searched for."), _("\
3991 Separate debug symbols are first searched for in the same\n\
3992 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3993 and lastly at the path of the directory of the binary with\n\
3994 each global debug-file-directory component prepended."),
3996 show_debug_file_directory
,
3997 &setlist
, &showlist
);
3999 add_setshow_enum_cmd ("symbol-loading", no_class
,
4000 print_symbol_loading_enums
, &print_symbol_loading
,
4002 Set printing of symbol loading messages."), _("\
4003 Show printing of symbol loading messages."), _("\
4004 off == turn all messages off\n\
4005 brief == print messages for the executable,\n\
4006 and brief messages for shared libraries\n\
4007 full == print messages for the executable,\n\
4008 and messages for each shared library."),
4011 &setprintlist
, &showprintlist
);
4013 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
4014 &separate_debug_file_debug
, _("\
4015 Set printing of separate debug info file search debug."), _("\
4016 Show printing of separate debug info file search debug."), _("\
4017 When on, GDB prints the searched locations while looking for separate debug \
4018 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
4021 selftests::register_test
4022 ("filename_language", selftests::filename_language::test_filename_language
);
4023 selftests::register_test
4024 ("set_ext_lang_command",
4025 selftests::filename_language::test_set_ext_lang_command
);