1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2018 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"
62 #include <sys/types.h>
71 int (*deprecated_ui_load_progress_hook
) (const char *section
,
73 void (*deprecated_show_load_progress
) (const char *section
,
74 unsigned long section_sent
,
75 unsigned long section_size
,
76 unsigned long total_sent
,
77 unsigned long total_size
);
78 void (*deprecated_pre_add_symbol_hook
) (const char *);
79 void (*deprecated_post_add_symbol_hook
) (void);
81 static void clear_symtab_users_cleanup (void *ignore
);
83 /* Global variables owned by this file. */
84 int readnow_symbol_files
; /* Read full symbols immediately. */
85 int readnever_symbol_files
; /* Never read full symbols. */
87 /* Functions this file defines. */
89 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
90 objfile_flags flags
, CORE_ADDR reloff
);
92 static const struct sym_fns
*find_sym_fns (bfd
*);
94 static void overlay_invalidate_all (void);
96 static void simple_free_overlay_table (void);
98 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
101 static int simple_read_overlay_table (void);
103 static int simple_overlay_update_1 (struct obj_section
*);
105 static void symfile_find_segment_sections (struct objfile
*objfile
);
107 /* List of all available sym_fns. On gdb startup, each object file reader
108 calls add_symtab_fns() to register information on each format it is
111 struct registered_sym_fns
113 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
114 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
117 /* BFD flavour that we handle. */
118 enum bfd_flavour sym_flavour
;
120 /* The "vtable" of symbol functions. */
121 const struct sym_fns
*sym_fns
;
124 static std::vector
<registered_sym_fns
> symtab_fns
;
126 /* Values for "set print symbol-loading". */
128 const char print_symbol_loading_off
[] = "off";
129 const char print_symbol_loading_brief
[] = "brief";
130 const char print_symbol_loading_full
[] = "full";
131 static const char *print_symbol_loading_enums
[] =
133 print_symbol_loading_off
,
134 print_symbol_loading_brief
,
135 print_symbol_loading_full
,
138 static const char *print_symbol_loading
= print_symbol_loading_full
;
140 /* If non-zero, shared library symbols will be added automatically
141 when the inferior is created, new libraries are loaded, or when
142 attaching to the inferior. This is almost always what users will
143 want to have happen; but for very large programs, the startup time
144 will be excessive, and so if this is a problem, the user can clear
145 this flag and then add the shared library symbols as needed. Note
146 that there is a potential for confusion, since if the shared
147 library symbols are not loaded, commands like "info fun" will *not*
148 report all the functions that are actually present. */
150 int auto_solib_add
= 1;
153 /* Return non-zero if symbol-loading messages should be printed.
154 FROM_TTY is the standard from_tty argument to gdb commands.
155 If EXEC is non-zero the messages are for the executable.
156 Otherwise, messages are for shared libraries.
157 If FULL is non-zero then the caller is printing a detailed message.
158 E.g., the message includes the shared library name.
159 Otherwise, the caller is printing a brief "summary" message. */
162 print_symbol_loading_p (int from_tty
, int exec
, int full
)
164 if (!from_tty
&& !info_verbose
)
169 /* We don't check FULL for executables, there are few such
170 messages, therefore brief == full. */
171 return print_symbol_loading
!= print_symbol_loading_off
;
174 return print_symbol_loading
== print_symbol_loading_full
;
175 return print_symbol_loading
== print_symbol_loading_brief
;
178 /* True if we are reading a symbol table. */
180 int currently_reading_symtab
= 0;
182 /* Increment currently_reading_symtab and return a cleanup that can be
183 used to decrement it. */
185 scoped_restore_tmpl
<int>
186 increment_reading_symtab (void)
188 gdb_assert (currently_reading_symtab
>= 0);
189 return make_scoped_restore (¤tly_reading_symtab
,
190 currently_reading_symtab
+ 1);
193 /* Remember the lowest-addressed loadable section we've seen.
194 This function is called via bfd_map_over_sections.
196 In case of equal vmas, the section with the largest size becomes the
197 lowest-addressed loadable section.
199 If the vmas and sizes are equal, the last section is considered the
200 lowest-addressed loadable section. */
203 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
205 asection
**lowest
= (asection
**) obj
;
207 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
210 *lowest
= sect
; /* First loadable section */
211 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
212 *lowest
= sect
; /* A lower loadable section */
213 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
214 && (bfd_section_size (abfd
, (*lowest
))
215 <= bfd_section_size (abfd
, sect
)))
219 /* Build (allocate and populate) a section_addr_info struct from
220 an existing section table. */
223 build_section_addr_info_from_section_table (const struct target_section
*start
,
224 const struct target_section
*end
)
226 const struct target_section
*stp
;
228 section_addr_info sap
;
230 for (stp
= start
; stp
!= end
; stp
++)
232 struct bfd_section
*asect
= stp
->the_bfd_section
;
233 bfd
*abfd
= asect
->owner
;
235 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
236 && sap
.size () < end
- start
)
237 sap
.emplace_back (stp
->addr
,
238 bfd_section_name (abfd
, asect
),
239 gdb_bfd_section_index (abfd
, asect
));
245 /* Create a section_addr_info from section offsets in ABFD. */
247 static section_addr_info
248 build_section_addr_info_from_bfd (bfd
*abfd
)
250 struct bfd_section
*sec
;
252 section_addr_info sap
;
253 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
254 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
255 sap
.emplace_back (bfd_get_section_vma (abfd
, sec
),
256 bfd_get_section_name (abfd
, sec
),
257 gdb_bfd_section_index (abfd
, sec
));
262 /* Create a section_addr_info from section offsets in OBJFILE. */
265 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
269 /* Before reread_symbols gets rewritten it is not safe to call:
270 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
272 section_addr_info sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
273 for (i
= 0; i
< sap
.size (); i
++)
275 int sectindex
= sap
[i
].sectindex
;
277 sap
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
282 /* Initialize OBJFILE's sect_index_* members. */
285 init_objfile_sect_indices (struct objfile
*objfile
)
290 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
292 objfile
->sect_index_text
= sect
->index
;
294 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
296 objfile
->sect_index_data
= sect
->index
;
298 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
300 objfile
->sect_index_bss
= sect
->index
;
302 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
304 objfile
->sect_index_rodata
= sect
->index
;
306 /* This is where things get really weird... We MUST have valid
307 indices for the various sect_index_* members or gdb will abort.
308 So if for example, there is no ".text" section, we have to
309 accomodate that. First, check for a file with the standard
310 one or two segments. */
312 symfile_find_segment_sections (objfile
);
314 /* Except when explicitly adding symbol files at some address,
315 section_offsets contains nothing but zeros, so it doesn't matter
316 which slot in section_offsets the individual sect_index_* members
317 index into. So if they are all zero, it is safe to just point
318 all the currently uninitialized indices to the first slot. But
319 beware: if this is the main executable, it may be relocated
320 later, e.g. by the remote qOffsets packet, and then this will
321 be wrong! That's why we try segments first. */
323 for (i
= 0; i
< objfile
->num_sections
; i
++)
325 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
330 if (i
== objfile
->num_sections
)
332 if (objfile
->sect_index_text
== -1)
333 objfile
->sect_index_text
= 0;
334 if (objfile
->sect_index_data
== -1)
335 objfile
->sect_index_data
= 0;
336 if (objfile
->sect_index_bss
== -1)
337 objfile
->sect_index_bss
= 0;
338 if (objfile
->sect_index_rodata
== -1)
339 objfile
->sect_index_rodata
= 0;
343 /* The arguments to place_section. */
345 struct place_section_arg
347 struct section_offsets
*offsets
;
351 /* Find a unique offset to use for loadable section SECT if
352 the user did not provide an offset. */
355 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
357 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
358 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
360 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
362 /* We are only interested in allocated sections. */
363 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
366 /* If the user specified an offset, honor it. */
367 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
370 /* Otherwise, let's try to find a place for the section. */
371 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
378 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
380 int indx
= cur_sec
->index
;
382 /* We don't need to compare against ourself. */
386 /* We can only conflict with allocated sections. */
387 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
390 /* If the section offset is 0, either the section has not been placed
391 yet, or it was the lowest section placed (in which case LOWEST
392 will be past its end). */
393 if (offsets
[indx
] == 0)
396 /* If this section would overlap us, then we must move up. */
397 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
398 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
400 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
401 start_addr
= (start_addr
+ align
- 1) & -align
;
406 /* Otherwise, we appear to be OK. So far. */
411 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
412 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
415 /* Store section_addr_info as prepared (made relative and with SECTINDEX
416 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
420 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
422 const section_addr_info
&addrs
)
426 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
428 /* Now calculate offsets for section that were specified by the caller. */
429 for (i
= 0; i
< addrs
.size (); i
++)
431 const struct other_sections
*osp
;
434 if (osp
->sectindex
== -1)
437 /* Record all sections in offsets. */
438 /* The section_offsets in the objfile are here filled in using
440 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
444 /* Transform section name S for a name comparison. prelink can split section
445 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
446 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
447 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
448 (`.sbss') section has invalid (increased) virtual address. */
451 addr_section_name (const char *s
)
453 if (strcmp (s
, ".dynbss") == 0)
455 if (strcmp (s
, ".sdynbss") == 0)
461 /* std::sort comparator for addrs_section_sort. Sort entries in
462 ascending order by their (name, sectindex) pair. sectindex makes
463 the sort by name stable. */
466 addrs_section_compar (const struct other_sections
*a
,
467 const struct other_sections
*b
)
471 retval
= strcmp (addr_section_name (a
->name
.c_str ()),
472 addr_section_name (b
->name
.c_str ()));
476 return a
->sectindex
< b
->sectindex
;
479 /* Provide sorted array of pointers to sections of ADDRS. */
481 static std::vector
<const struct other_sections
*>
482 addrs_section_sort (const section_addr_info
&addrs
)
486 std::vector
<const struct other_sections
*> array (addrs
.size ());
487 for (i
= 0; i
< addrs
.size (); i
++)
488 array
[i
] = &addrs
[i
];
490 std::sort (array
.begin (), array
.end (), addrs_section_compar
);
495 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
496 also SECTINDEXes specific to ABFD there. This function can be used to
497 rebase ADDRS to start referencing different BFD than before. */
500 addr_info_make_relative (section_addr_info
*addrs
, bfd
*abfd
)
502 asection
*lower_sect
;
503 CORE_ADDR lower_offset
;
506 /* Find lowest loadable section to be used as starting point for
507 continguous sections. */
509 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
510 if (lower_sect
== NULL
)
512 warning (_("no loadable sections found in added symbol-file %s"),
513 bfd_get_filename (abfd
));
517 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
519 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
520 in ABFD. Section names are not unique - there can be multiple sections of
521 the same name. Also the sections of the same name do not have to be
522 adjacent to each other. Some sections may be present only in one of the
523 files. Even sections present in both files do not have to be in the same
526 Use stable sort by name for the sections in both files. Then linearly
527 scan both lists matching as most of the entries as possible. */
529 std::vector
<const struct other_sections
*> addrs_sorted
530 = addrs_section_sort (*addrs
);
532 section_addr_info abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
533 std::vector
<const struct other_sections
*> abfd_addrs_sorted
534 = addrs_section_sort (abfd_addrs
);
536 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
537 ABFD_ADDRS_SORTED. */
539 std::vector
<const struct other_sections
*>
540 addrs_to_abfd_addrs (addrs
->size (), nullptr);
542 std::vector
<const struct other_sections
*>::iterator abfd_sorted_iter
543 = abfd_addrs_sorted
.begin ();
544 for (const other_sections
*sect
: addrs_sorted
)
546 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
548 while (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
549 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
553 if (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
554 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
559 /* Make the found item directly addressable from ADDRS. */
560 index_in_addrs
= sect
- addrs
->data ();
561 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
562 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_sorted_iter
;
564 /* Never use the same ABFD entry twice. */
569 /* Calculate offsets for the loadable sections.
570 FIXME! Sections must be in order of increasing loadable section
571 so that contiguous sections can use the lower-offset!!!
573 Adjust offsets if the segments are not contiguous.
574 If the section is contiguous, its offset should be set to
575 the offset of the highest loadable section lower than it
576 (the loadable section directly below it in memory).
577 this_offset = lower_offset = lower_addr - lower_orig_addr */
579 for (i
= 0; i
< addrs
->size (); i
++)
581 const struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
585 /* This is the index used by BFD. */
586 (*addrs
)[i
].sectindex
= sect
->sectindex
;
588 if ((*addrs
)[i
].addr
!= 0)
590 (*addrs
)[i
].addr
-= sect
->addr
;
591 lower_offset
= (*addrs
)[i
].addr
;
594 (*addrs
)[i
].addr
= lower_offset
;
598 /* addr_section_name transformation is not used for SECT_NAME. */
599 const std::string
§_name
= (*addrs
)[i
].name
;
601 /* This section does not exist in ABFD, which is normally
602 unexpected and we want to issue a warning.
604 However, the ELF prelinker does create a few sections which are
605 marked in the main executable as loadable (they are loaded in
606 memory from the DYNAMIC segment) and yet are not present in
607 separate debug info files. This is fine, and should not cause
608 a warning. Shared libraries contain just the section
609 ".gnu.liblist" but it is not marked as loadable there. There is
610 no other way to identify them than by their name as the sections
611 created by prelink have no special flags.
613 For the sections `.bss' and `.sbss' see addr_section_name. */
615 if (!(sect_name
== ".gnu.liblist"
616 || sect_name
== ".gnu.conflict"
617 || (sect_name
== ".bss"
619 && (*addrs
)[i
- 1].name
== ".dynbss"
620 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
621 || (sect_name
== ".sbss"
623 && (*addrs
)[i
- 1].name
== ".sdynbss"
624 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
625 warning (_("section %s not found in %s"), sect_name
.c_str (),
626 bfd_get_filename (abfd
));
628 (*addrs
)[i
].addr
= 0;
629 (*addrs
)[i
].sectindex
= -1;
634 /* Parse the user's idea of an offset for dynamic linking, into our idea
635 of how to represent it for fast symbol reading. This is the default
636 version of the sym_fns.sym_offsets function for symbol readers that
637 don't need to do anything special. It allocates a section_offsets table
638 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
641 default_symfile_offsets (struct objfile
*objfile
,
642 const section_addr_info
&addrs
)
644 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
645 objfile
->section_offsets
= (struct section_offsets
*)
646 obstack_alloc (&objfile
->objfile_obstack
,
647 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
648 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
649 objfile
->num_sections
, addrs
);
651 /* For relocatable files, all loadable sections will start at zero.
652 The zero is meaningless, so try to pick arbitrary addresses such
653 that no loadable sections overlap. This algorithm is quadratic,
654 but the number of sections in a single object file is generally
656 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
658 struct place_section_arg arg
;
659 bfd
*abfd
= objfile
->obfd
;
662 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
663 /* We do not expect this to happen; just skip this step if the
664 relocatable file has a section with an assigned VMA. */
665 if (bfd_section_vma (abfd
, cur_sec
) != 0)
670 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
672 /* Pick non-overlapping offsets for sections the user did not
674 arg
.offsets
= objfile
->section_offsets
;
676 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
678 /* Correctly filling in the section offsets is not quite
679 enough. Relocatable files have two properties that
680 (most) shared objects do not:
682 - Their debug information will contain relocations. Some
683 shared libraries do also, but many do not, so this can not
686 - If there are multiple code sections they will be loaded
687 at different relative addresses in memory than they are
688 in the objfile, since all sections in the file will start
691 Because GDB has very limited ability to map from an
692 address in debug info to the correct code section,
693 it relies on adding SECT_OFF_TEXT to things which might be
694 code. If we clear all the section offsets, and set the
695 section VMAs instead, then symfile_relocate_debug_section
696 will return meaningful debug information pointing at the
699 GDB has too many different data structures for section
700 addresses - a bfd, objfile, and so_list all have section
701 tables, as does exec_ops. Some of these could probably
704 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
705 cur_sec
= cur_sec
->next
)
707 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
710 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
711 exec_set_section_address (bfd_get_filename (abfd
),
713 offsets
[cur_sec
->index
]);
714 offsets
[cur_sec
->index
] = 0;
719 /* Remember the bfd indexes for the .text, .data, .bss and
721 init_objfile_sect_indices (objfile
);
724 /* Divide the file into segments, which are individual relocatable units.
725 This is the default version of the sym_fns.sym_segments function for
726 symbol readers that do not have an explicit representation of segments.
727 It assumes that object files do not have segments, and fully linked
728 files have a single segment. */
730 struct symfile_segment_data
*
731 default_symfile_segments (bfd
*abfd
)
735 struct symfile_segment_data
*data
;
738 /* Relocatable files contain enough information to position each
739 loadable section independently; they should not be relocated
741 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
744 /* Make sure there is at least one loadable section in the file. */
745 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
747 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
755 low
= bfd_get_section_vma (abfd
, sect
);
756 high
= low
+ bfd_get_section_size (sect
);
758 data
= XCNEW (struct symfile_segment_data
);
759 data
->num_segments
= 1;
760 data
->segment_bases
= XCNEW (CORE_ADDR
);
761 data
->segment_sizes
= XCNEW (CORE_ADDR
);
763 num_sections
= bfd_count_sections (abfd
);
764 data
->segment_info
= XCNEWVEC (int, num_sections
);
766 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
770 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
773 vma
= bfd_get_section_vma (abfd
, sect
);
776 if (vma
+ bfd_get_section_size (sect
) > high
)
777 high
= vma
+ bfd_get_section_size (sect
);
779 data
->segment_info
[i
] = 1;
782 data
->segment_bases
[0] = low
;
783 data
->segment_sizes
[0] = high
- low
;
788 /* This is a convenience function to call sym_read for OBJFILE and
789 possibly force the partial symbols to be read. */
792 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
794 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
795 objfile
->per_bfd
->minsyms_read
= true;
797 /* find_separate_debug_file_in_section should be called only if there is
798 single binary with no existing separate debug info file. */
799 if (!objfile_has_partial_symbols (objfile
)
800 && objfile
->separate_debug_objfile
== NULL
801 && objfile
->separate_debug_objfile_backlink
== NULL
)
803 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
807 /* find_separate_debug_file_in_section uses the same filename for the
808 virtual section-as-bfd like the bfd filename containing the
809 section. Therefore use also non-canonical name form for the same
810 file containing the section. */
811 symbol_file_add_separate (abfd
.get (),
812 bfd_get_filename (abfd
.get ()),
813 add_flags
| SYMFILE_NOT_FILENAME
, objfile
);
816 if ((add_flags
& SYMFILE_NO_READ
) == 0)
817 require_partial_symbols (objfile
, 0);
820 /* Initialize entry point information for this objfile. */
823 init_entry_point_info (struct objfile
*objfile
)
825 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
831 /* Save startup file's range of PC addresses to help blockframe.c
832 decide where the bottom of the stack is. */
834 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
836 /* Executable file -- record its entry point so we'll recognize
837 the startup file because it contains the entry point. */
838 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
839 ei
->entry_point_p
= 1;
841 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
842 && bfd_get_start_address (objfile
->obfd
) != 0)
844 /* Some shared libraries may have entry points set and be
845 runnable. There's no clear way to indicate this, so just check
846 for values other than zero. */
847 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
848 ei
->entry_point_p
= 1;
852 /* Examination of non-executable.o files. Short-circuit this stuff. */
853 ei
->entry_point_p
= 0;
856 if (ei
->entry_point_p
)
858 struct obj_section
*osect
;
859 CORE_ADDR entry_point
= ei
->entry_point
;
862 /* Make certain that the address points at real code, and not a
863 function descriptor. */
865 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
867 current_top_target ());
869 /* Remove any ISA markers, so that this matches entries in the
872 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
875 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
877 struct bfd_section
*sect
= osect
->the_bfd_section
;
879 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
880 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
881 + bfd_get_section_size (sect
)))
883 ei
->the_bfd_section_index
884 = gdb_bfd_section_index (objfile
->obfd
, sect
);
891 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
895 /* Process a symbol file, as either the main file or as a dynamically
898 This function does not set the OBJFILE's entry-point info.
900 OBJFILE is where the symbols are to be read from.
902 ADDRS is the list of section load addresses. If the user has given
903 an 'add-symbol-file' command, then this is the list of offsets and
904 addresses he or she provided as arguments to the command; or, if
905 we're handling a shared library, these are the actual addresses the
906 sections are loaded at, according to the inferior's dynamic linker
907 (as gleaned by GDB's shared library code). We convert each address
908 into an offset from the section VMA's as it appears in the object
909 file, and then call the file's sym_offsets function to convert this
910 into a format-specific offset table --- a `struct section_offsets'.
911 The sectindex field is used to control the ordering of sections
912 with the same name. Upon return, it is updated to contain the
913 correspondig BFD section index, or -1 if the section was not found.
915 ADD_FLAGS encodes verbosity level, whether this is main symbol or
916 an extra symbol file such as dynamically loaded code, and wether
917 breakpoint reset should be deferred. */
920 syms_from_objfile_1 (struct objfile
*objfile
,
921 section_addr_info
*addrs
,
922 symfile_add_flags add_flags
)
924 section_addr_info local_addr
;
925 struct cleanup
*old_chain
;
926 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
928 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
930 if (objfile
->sf
== NULL
)
932 /* No symbols to load, but we still need to make sure
933 that the section_offsets table is allocated. */
934 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
935 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
937 objfile
->num_sections
= num_sections
;
938 objfile
->section_offsets
939 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
941 memset (objfile
->section_offsets
, 0, size
);
945 /* Make sure that partially constructed symbol tables will be cleaned up
946 if an error occurs during symbol reading. */
947 old_chain
= make_cleanup (null_cleanup
, NULL
);
948 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
950 /* If ADDRS is NULL, put together a dummy address list.
951 We now establish the convention that an addr of zero means
952 no load address was specified. */
958 /* We will modify the main symbol table, make sure that all its users
959 will be cleaned up if an error occurs during symbol reading. */
960 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
962 /* Since no error yet, throw away the old symbol table. */
964 if (symfile_objfile
!= NULL
)
966 delete symfile_objfile
;
967 gdb_assert (symfile_objfile
== NULL
);
970 /* Currently we keep symbols from the add-symbol-file command.
971 If the user wants to get rid of them, they should do "symbol-file"
972 without arguments first. Not sure this is the best behavior
975 (*objfile
->sf
->sym_new_init
) (objfile
);
978 /* Convert addr into an offset rather than an absolute address.
979 We find the lowest address of a loaded segment in the objfile,
980 and assume that <addr> is where that got loaded.
982 We no longer warn if the lowest section is not a text segment (as
983 happens for the PA64 port. */
984 if (addrs
->size () > 0)
985 addr_info_make_relative (addrs
, objfile
->obfd
);
987 /* Initialize symbol reading routines for this objfile, allow complaints to
988 appear for this new file, and record how verbose to be, then do the
989 initial symbol reading for this file. */
991 (*objfile
->sf
->sym_init
) (objfile
);
992 clear_complaints (1);
994 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
996 read_symbols (objfile
, add_flags
);
998 /* Discard cleanups as symbol reading was successful. */
1000 objfile_holder
.release ();
1001 discard_cleanups (old_chain
);
1004 /* Same as syms_from_objfile_1, but also initializes the objfile
1005 entry-point info. */
1008 syms_from_objfile (struct objfile
*objfile
,
1009 section_addr_info
*addrs
,
1010 symfile_add_flags add_flags
)
1012 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1013 init_entry_point_info (objfile
);
1016 /* Perform required actions after either reading in the initial
1017 symbols for a new objfile, or mapping in the symbols from a reusable
1018 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1021 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1023 /* If this is the main symbol file we have to clean up all users of the
1024 old main symbol file. Otherwise it is sufficient to fixup all the
1025 breakpoints that may have been redefined by this symbol file. */
1026 if (add_flags
& SYMFILE_MAINLINE
)
1028 /* OK, make it the "real" symbol file. */
1029 symfile_objfile
= objfile
;
1031 clear_symtab_users (add_flags
);
1033 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1035 breakpoint_re_set ();
1038 /* We're done reading the symbol file; finish off complaints. */
1039 clear_complaints (0);
1042 /* Process a symbol file, as either the main file or as a dynamically
1045 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1046 A new reference is acquired by this function.
1048 For NAME description see the objfile constructor.
1050 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1051 extra, such as dynamically loaded code, and what to do with breakpoins.
1053 ADDRS is as described for syms_from_objfile_1, above.
1054 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1056 PARENT is the original objfile if ABFD is a separate debug info file.
1057 Otherwise PARENT is NULL.
1059 Upon success, returns a pointer to the objfile that was added.
1060 Upon failure, jumps back to command level (never returns). */
1062 static struct objfile
*
1063 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1064 symfile_add_flags add_flags
,
1065 section_addr_info
*addrs
,
1066 objfile_flags flags
, struct objfile
*parent
)
1068 struct objfile
*objfile
;
1069 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1070 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1071 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1072 && (readnow_symbol_files
1073 || (add_flags
& SYMFILE_NO_READ
) == 0));
1075 if (readnow_symbol_files
)
1077 flags
|= OBJF_READNOW
;
1078 add_flags
&= ~SYMFILE_NO_READ
;
1080 else if (readnever_symbol_files
1081 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1083 flags
|= OBJF_READNEVER
;
1084 add_flags
|= SYMFILE_NO_READ
;
1086 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1087 flags
|= OBJF_NOT_FILENAME
;
1089 /* Give user a chance to burp if we'd be
1090 interactively wiping out any existing symbols. */
1092 if ((have_full_symbols () || have_partial_symbols ())
1095 && !query (_("Load new symbol table from \"%s\"? "), name
))
1096 error (_("Not confirmed."));
1099 flags
|= OBJF_MAINLINE
;
1100 objfile
= new struct objfile (abfd
, name
, flags
);
1103 add_separate_debug_objfile (objfile
, parent
);
1105 /* We either created a new mapped symbol table, mapped an existing
1106 symbol table file which has not had initial symbol reading
1107 performed, or need to read an unmapped symbol table. */
1110 if (deprecated_pre_add_symbol_hook
)
1111 deprecated_pre_add_symbol_hook (name
);
1113 printf_filtered (_("Reading symbols from %s...\n"), name
);
1115 syms_from_objfile (objfile
, addrs
, add_flags
);
1117 /* We now have at least a partial symbol table. Check to see if the
1118 user requested that all symbols be read on initial access via either
1119 the gdb startup command line or on a per symbol file basis. Expand
1120 all partial symbol tables for this objfile if so. */
1122 if ((flags
& OBJF_READNOW
))
1125 printf_filtered (_("Expanding full symbols from %s...\n"), name
);
1128 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1131 if (should_print
&& !objfile_has_symbols (objfile
))
1132 printf_filtered (_("(No debugging symbols found in %s)\n"), name
);
1136 if (deprecated_post_add_symbol_hook
)
1137 deprecated_post_add_symbol_hook ();
1140 /* We print some messages regardless of whether 'from_tty ||
1141 info_verbose' is true, so make sure they go out at the right
1143 gdb_flush (gdb_stdout
);
1145 if (objfile
->sf
== NULL
)
1147 gdb::observers::new_objfile
.notify (objfile
);
1148 return objfile
; /* No symbols. */
1151 finish_new_objfile (objfile
, add_flags
);
1153 gdb::observers::new_objfile
.notify (objfile
);
1155 bfd_cache_close_all ();
1159 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1160 see the objfile constructor. */
1163 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1164 symfile_add_flags symfile_flags
,
1165 struct objfile
*objfile
)
1167 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1168 because sections of BFD may not match sections of OBJFILE and because
1169 vma may have been modified by tools such as prelink. */
1170 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1172 symbol_file_add_with_addrs
1173 (bfd
, name
, symfile_flags
, &sap
,
1174 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1179 /* Process the symbol file ABFD, as either the main file or as a
1180 dynamically loaded file.
1181 See symbol_file_add_with_addrs's comments for details. */
1184 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1185 symfile_add_flags add_flags
,
1186 section_addr_info
*addrs
,
1187 objfile_flags flags
, struct objfile
*parent
)
1189 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1193 /* Process a symbol file, as either the main file or as a dynamically
1194 loaded file. See symbol_file_add_with_addrs's comments for details. */
1197 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1198 section_addr_info
*addrs
, objfile_flags flags
)
1200 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1202 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1206 /* Call symbol_file_add() with default values and update whatever is
1207 affected by the loading of a new main().
1208 Used when the file is supplied in the gdb command line
1209 and by some targets with special loading requirements.
1210 The auxiliary function, symbol_file_add_main_1(), has the flags
1211 argument for the switches that can only be specified in the symbol_file
1215 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1217 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1221 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1222 objfile_flags flags
, CORE_ADDR reloff
)
1224 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1226 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1228 objfile_rebase (objfile
, reloff
);
1230 /* Getting new symbols may change our opinion about
1231 what is frameless. */
1232 reinit_frame_cache ();
1234 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1235 set_initial_language ();
1239 symbol_file_clear (int from_tty
)
1241 if ((have_full_symbols () || have_partial_symbols ())
1244 ? !query (_("Discard symbol table from `%s'? "),
1245 objfile_name (symfile_objfile
))
1246 : !query (_("Discard symbol table? "))))
1247 error (_("Not confirmed."));
1249 /* solib descriptors may have handles to objfiles. Wipe them before their
1250 objfiles get stale by free_all_objfiles. */
1251 no_shared_libraries (NULL
, from_tty
);
1253 free_all_objfiles ();
1255 gdb_assert (symfile_objfile
== NULL
);
1257 printf_filtered (_("No symbol file now.\n"));
1260 /* See symfile.h. */
1262 int separate_debug_file_debug
= 0;
1265 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1266 struct objfile
*parent_objfile
)
1268 unsigned long file_crc
;
1270 struct stat parent_stat
, abfd_stat
;
1271 int verified_as_different
;
1273 /* Find a separate debug info file as if symbols would be present in
1274 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1275 section can contain just the basename of PARENT_OBJFILE without any
1276 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1277 the separate debug infos with the same basename can exist. */
1279 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1282 if (separate_debug_file_debug
)
1283 printf_filtered (_(" Trying %s\n"), name
.c_str ());
1285 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
, -1));
1290 /* Verify symlinks were not the cause of filename_cmp name difference above.
1292 Some operating systems, e.g. Windows, do not provide a meaningful
1293 st_ino; they always set it to zero. (Windows does provide a
1294 meaningful st_dev.) Files accessed from gdbservers that do not
1295 support the vFile:fstat packet will also have st_ino set to zero.
1296 Do not indicate a duplicate library in either case. While there
1297 is no guarantee that a system that provides meaningful inode
1298 numbers will never set st_ino to zero, this is merely an
1299 optimization, so we do not need to worry about false negatives. */
1301 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1302 && abfd_stat
.st_ino
!= 0
1303 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1305 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1306 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1308 verified_as_different
= 1;
1311 verified_as_different
= 0;
1313 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1318 if (crc
!= file_crc
)
1320 unsigned long parent_crc
;
1322 /* If the files could not be verified as different with
1323 bfd_stat then we need to calculate the parent's CRC
1324 to verify whether the files are different or not. */
1326 if (!verified_as_different
)
1328 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1332 if (verified_as_different
|| parent_crc
!= file_crc
)
1333 warning (_("the debug information found in \"%s\""
1334 " does not match \"%s\" (CRC mismatch).\n"),
1335 name
.c_str (), objfile_name (parent_objfile
));
1343 char *debug_file_directory
= NULL
;
1345 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1346 struct cmd_list_element
*c
, const char *value
)
1348 fprintf_filtered (file
,
1349 _("The directory where separate debug "
1350 "symbols are searched for is \"%s\".\n"),
1354 #if ! defined (DEBUG_SUBDIRECTORY)
1355 #define DEBUG_SUBDIRECTORY ".debug"
1358 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1359 where the original file resides (may not be the same as
1360 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1361 looking for. CANON_DIR is the "realpath" form of DIR.
1362 DIR must contain a trailing '/'.
1363 Returns the path of the file with separate debug info, or an empty
1367 find_separate_debug_file (const char *dir
,
1368 const char *canon_dir
,
1369 const char *debuglink
,
1370 unsigned long crc32
, struct objfile
*objfile
)
1372 if (separate_debug_file_debug
)
1373 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1374 "%s\n"), objfile_name (objfile
));
1376 /* First try in the same directory as the original file. */
1377 std::string debugfile
= dir
;
1378 debugfile
+= debuglink
;
1380 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1383 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1385 debugfile
+= DEBUG_SUBDIRECTORY
;
1387 debugfile
+= debuglink
;
1389 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1392 /* Then try in the global debugfile directories.
1394 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1395 cause "/..." lookups. */
1397 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1398 = dirnames_to_char_ptr_vec (debug_file_directory
);
1400 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1402 debugfile
= debugdir
.get ();
1405 debugfile
+= debuglink
;
1407 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1410 /* If the file is in the sysroot, try using its base path in the
1411 global debugfile directory. */
1412 if (canon_dir
!= NULL
1413 && filename_ncmp (canon_dir
, gdb_sysroot
,
1414 strlen (gdb_sysroot
)) == 0
1415 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1417 debugfile
= debugdir
.get ();
1418 debugfile
+= (canon_dir
+ strlen (gdb_sysroot
));
1420 debugfile
+= debuglink
;
1422 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1427 return std::string ();
1430 /* Modify PATH to contain only "[/]directory/" part of PATH.
1431 If there were no directory separators in PATH, PATH will be empty
1432 string on return. */
1435 terminate_after_last_dir_separator (char *path
)
1439 /* Strip off the final filename part, leaving the directory name,
1440 followed by a slash. The directory can be relative or absolute. */
1441 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1442 if (IS_DIR_SEPARATOR (path
[i
]))
1445 /* If I is -1 then no directory is present there and DIR will be "". */
1449 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1450 Returns pathname, or an empty string. */
1453 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1455 unsigned long crc32
;
1457 gdb::unique_xmalloc_ptr
<char> debuglink
1458 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1460 if (debuglink
== NULL
)
1462 /* There's no separate debug info, hence there's no way we could
1463 load it => no warning. */
1464 return std::string ();
1467 std::string dir
= objfile_name (objfile
);
1468 terminate_after_last_dir_separator (&dir
[0]);
1469 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1471 std::string debugfile
1472 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1473 debuglink
.get (), crc32
, objfile
);
1475 if (debugfile
.empty ())
1477 /* For PR gdb/9538, try again with realpath (if different from the
1482 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1483 && S_ISLNK (st_buf
.st_mode
))
1485 gdb::unique_xmalloc_ptr
<char> symlink_dir
1486 (lrealpath (objfile_name (objfile
)));
1487 if (symlink_dir
!= NULL
)
1489 terminate_after_last_dir_separator (symlink_dir
.get ());
1490 if (dir
!= symlink_dir
.get ())
1492 /* Different directory, so try using it. */
1493 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1506 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1510 validate_readnow_readnever (objfile_flags flags
)
1512 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1513 error (_("-readnow and -readnever cannot be used simultaneously"));
1516 /* This is the symbol-file command. Read the file, analyze its
1517 symbols, and add a struct symtab to a symtab list. The syntax of
1518 the command is rather bizarre:
1520 1. The function buildargv implements various quoting conventions
1521 which are undocumented and have little or nothing in common with
1522 the way things are quoted (or not quoted) elsewhere in GDB.
1524 2. Options are used, which are not generally used in GDB (perhaps
1525 "set mapped on", "set readnow on" would be better)
1527 3. The order of options matters, which is contrary to GNU
1528 conventions (because it is confusing and inconvenient). */
1531 symbol_file_command (const char *args
, int from_tty
)
1537 symbol_file_clear (from_tty
);
1541 objfile_flags flags
= OBJF_USERLOADED
;
1542 symfile_add_flags add_flags
= 0;
1544 bool stop_processing_options
= false;
1545 CORE_ADDR offset
= 0;
1550 add_flags
|= SYMFILE_VERBOSE
;
1552 gdb_argv
built_argv (args
);
1553 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1555 if (stop_processing_options
|| *arg
!= '-')
1560 error (_("Unrecognized argument \"%s\""), arg
);
1562 else if (strcmp (arg
, "-readnow") == 0)
1563 flags
|= OBJF_READNOW
;
1564 else if (strcmp (arg
, "-readnever") == 0)
1565 flags
|= OBJF_READNEVER
;
1566 else if (strcmp (arg
, "-o") == 0)
1568 arg
= built_argv
[++idx
];
1570 error (_("Missing argument to -o"));
1572 offset
= parse_and_eval_address (arg
);
1574 else if (strcmp (arg
, "--") == 0)
1575 stop_processing_options
= true;
1577 error (_("Unrecognized argument \"%s\""), arg
);
1581 error (_("no symbol file name was specified"));
1583 validate_readnow_readnever (flags
);
1585 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1589 /* Set the initial language.
1591 FIXME: A better solution would be to record the language in the
1592 psymtab when reading partial symbols, and then use it (if known) to
1593 set the language. This would be a win for formats that encode the
1594 language in an easily discoverable place, such as DWARF. For
1595 stabs, we can jump through hoops looking for specially named
1596 symbols or try to intuit the language from the specific type of
1597 stabs we find, but we can't do that until later when we read in
1601 set_initial_language (void)
1603 enum language lang
= main_language ();
1605 if (lang
== language_unknown
)
1607 char *name
= main_name ();
1608 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1611 lang
= SYMBOL_LANGUAGE (sym
);
1614 if (lang
== language_unknown
)
1616 /* Make C the default language */
1620 set_language (lang
);
1621 expected_language
= current_language
; /* Don't warn the user. */
1624 /* Open the file specified by NAME and hand it off to BFD for
1625 preliminary analysis. Return a newly initialized bfd *, which
1626 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1627 absolute). In case of trouble, error() is called. */
1630 symfile_bfd_open (const char *name
)
1634 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1635 if (!is_target_filename (name
))
1637 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1639 /* Look down path for it, allocate 2nd new malloc'd copy. */
1640 desc
= openp (getenv ("PATH"),
1641 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1642 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1643 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1646 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1648 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1649 desc
= openp (getenv ("PATH"),
1650 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1651 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1655 perror_with_name (expanded_name
.get ());
1657 name
= absolute_name
.get ();
1660 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1661 if (sym_bfd
== NULL
)
1662 error (_("`%s': can't open to read symbols: %s."), name
,
1663 bfd_errmsg (bfd_get_error ()));
1665 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1666 bfd_set_cacheable (sym_bfd
.get (), 1);
1668 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1669 error (_("`%s': can't read symbols: %s."), name
,
1670 bfd_errmsg (bfd_get_error ()));
1675 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1676 the section was not found. */
1679 get_section_index (struct objfile
*objfile
, const char *section_name
)
1681 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1689 /* Link SF into the global symtab_fns list.
1690 FLAVOUR is the file format that SF handles.
1691 Called on startup by the _initialize routine in each object file format
1692 reader, to register information about each format the reader is prepared
1696 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1698 symtab_fns
.emplace_back (flavour
, sf
);
1701 /* Initialize OBJFILE to read symbols from its associated BFD. It
1702 either returns or calls error(). The result is an initialized
1703 struct sym_fns in the objfile structure, that contains cached
1704 information about the symbol file. */
1706 static const struct sym_fns
*
1707 find_sym_fns (bfd
*abfd
)
1709 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1711 if (our_flavour
== bfd_target_srec_flavour
1712 || our_flavour
== bfd_target_ihex_flavour
1713 || our_flavour
== bfd_target_tekhex_flavour
)
1714 return NULL
; /* No symbols. */
1716 for (const registered_sym_fns
&rsf
: symtab_fns
)
1717 if (our_flavour
== rsf
.sym_flavour
)
1720 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1721 bfd_get_target (abfd
));
1725 /* This function runs the load command of our current target. */
1728 load_command (const char *arg
, int from_tty
)
1732 /* The user might be reloading because the binary has changed. Take
1733 this opportunity to check. */
1734 reopen_exec_file ();
1740 const char *parg
, *prev
;
1742 arg
= get_exec_file (1);
1744 /* We may need to quote this string so buildargv can pull it
1747 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1749 temp
.append (prev
, parg
- prev
);
1751 temp
.push_back ('\\');
1753 /* If we have not copied anything yet, then we didn't see a
1754 character to quote, and we can just leave ARG unchanged. */
1758 arg
= temp
.c_str ();
1762 target_load (arg
, from_tty
);
1764 /* After re-loading the executable, we don't really know which
1765 overlays are mapped any more. */
1766 overlay_cache_invalid
= 1;
1769 /* This version of "load" should be usable for any target. Currently
1770 it is just used for remote targets, not inftarg.c or core files,
1771 on the theory that only in that case is it useful.
1773 Avoiding xmodem and the like seems like a win (a) because we don't have
1774 to worry about finding it, and (b) On VMS, fork() is very slow and so
1775 we don't want to run a subprocess. On the other hand, I'm not sure how
1776 performance compares. */
1778 static int validate_download
= 0;
1780 /* Callback service function for generic_load (bfd_map_over_sections). */
1783 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1785 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1787 *sum
+= bfd_get_section_size (asec
);
1790 /* Opaque data for load_progress. */
1791 struct load_progress_data
1793 /* Cumulative data. */
1794 unsigned long write_count
= 0;
1795 unsigned long data_count
= 0;
1796 bfd_size_type total_size
= 0;
1799 /* Opaque data for load_progress for a single section. */
1800 struct load_progress_section_data
1802 load_progress_section_data (load_progress_data
*cumulative_
,
1803 const char *section_name_
, ULONGEST section_size_
,
1804 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1805 : cumulative (cumulative_
), section_name (section_name_
),
1806 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1809 struct load_progress_data
*cumulative
;
1811 /* Per-section data. */
1812 const char *section_name
;
1813 ULONGEST section_sent
= 0;
1814 ULONGEST section_size
;
1819 /* Opaque data for load_section_callback. */
1820 struct load_section_data
1822 load_section_data (load_progress_data
*progress_data_
)
1823 : progress_data (progress_data_
)
1826 ~load_section_data ()
1828 for (auto &&request
: requests
)
1830 xfree (request
.data
);
1831 delete ((load_progress_section_data
*) request
.baton
);
1835 CORE_ADDR load_offset
= 0;
1836 struct load_progress_data
*progress_data
;
1837 std::vector
<struct memory_write_request
> requests
;
1840 /* Target write callback routine for progress reporting. */
1843 load_progress (ULONGEST bytes
, void *untyped_arg
)
1845 struct load_progress_section_data
*args
1846 = (struct load_progress_section_data
*) untyped_arg
;
1847 struct load_progress_data
*totals
;
1850 /* Writing padding data. No easy way to get at the cumulative
1851 stats, so just ignore this. */
1854 totals
= args
->cumulative
;
1856 if (bytes
== 0 && args
->section_sent
== 0)
1858 /* The write is just starting. Let the user know we've started
1860 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1862 hex_string (args
->section_size
),
1863 paddress (target_gdbarch (), args
->lma
));
1867 if (validate_download
)
1869 /* Broken memories and broken monitors manifest themselves here
1870 when bring new computers to life. This doubles already slow
1872 /* NOTE: cagney/1999-10-18: A more efficient implementation
1873 might add a verify_memory() method to the target vector and
1874 then use that. remote.c could implement that method using
1875 the ``qCRC'' packet. */
1876 gdb::byte_vector
check (bytes
);
1878 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1879 error (_("Download verify read failed at %s"),
1880 paddress (target_gdbarch (), args
->lma
));
1881 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1882 error (_("Download verify compare failed at %s"),
1883 paddress (target_gdbarch (), args
->lma
));
1885 totals
->data_count
+= bytes
;
1887 args
->buffer
+= bytes
;
1888 totals
->write_count
+= 1;
1889 args
->section_sent
+= bytes
;
1890 if (check_quit_flag ()
1891 || (deprecated_ui_load_progress_hook
!= NULL
1892 && deprecated_ui_load_progress_hook (args
->section_name
,
1893 args
->section_sent
)))
1894 error (_("Canceled the download"));
1896 if (deprecated_show_load_progress
!= NULL
)
1897 deprecated_show_load_progress (args
->section_name
,
1901 totals
->total_size
);
1904 /* Callback service function for generic_load (bfd_map_over_sections). */
1907 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1909 struct load_section_data
*args
= (struct load_section_data
*) data
;
1910 bfd_size_type size
= bfd_get_section_size (asec
);
1911 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1913 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1919 ULONGEST begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1920 ULONGEST end
= begin
+ size
;
1921 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1922 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1924 load_progress_section_data
*section_data
1925 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
1928 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
1931 static void print_transfer_performance (struct ui_file
*stream
,
1932 unsigned long data_count
,
1933 unsigned long write_count
,
1934 std::chrono::steady_clock::duration d
);
1937 generic_load (const char *args
, int from_tty
)
1939 struct load_progress_data total_progress
;
1940 struct load_section_data
cbdata (&total_progress
);
1941 struct ui_out
*uiout
= current_uiout
;
1944 error_no_arg (_("file to load"));
1946 gdb_argv
argv (args
);
1948 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
1950 if (argv
[1] != NULL
)
1954 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
1956 /* If the last word was not a valid number then
1957 treat it as a file name with spaces in. */
1958 if (argv
[1] == endptr
)
1959 error (_("Invalid download offset:%s."), argv
[1]);
1961 if (argv
[2] != NULL
)
1962 error (_("Too many parameters."));
1965 /* Open the file for loading. */
1966 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
1967 if (loadfile_bfd
== NULL
)
1968 perror_with_name (filename
.get ());
1970 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
1972 error (_("\"%s\" is not an object file: %s"), filename
.get (),
1973 bfd_errmsg (bfd_get_error ()));
1976 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
1977 (void *) &total_progress
.total_size
);
1979 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
1981 using namespace std::chrono
;
1983 steady_clock::time_point start_time
= steady_clock::now ();
1985 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1986 load_progress
) != 0)
1987 error (_("Load failed"));
1989 steady_clock::time_point end_time
= steady_clock::now ();
1991 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
1992 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
1993 uiout
->text ("Start address ");
1994 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
1995 uiout
->text (", load size ");
1996 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
1998 regcache_write_pc (get_current_regcache (), entry
);
2000 /* Reset breakpoints, now that we have changed the load image. For
2001 instance, breakpoints may have been set (or reset, by
2002 post_create_inferior) while connected to the target but before we
2003 loaded the program. In that case, the prologue analyzer could
2004 have read instructions from the target to find the right
2005 breakpoint locations. Loading has changed the contents of that
2008 breakpoint_re_set ();
2010 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2011 total_progress
.write_count
,
2012 end_time
- start_time
);
2015 /* Report on STREAM the performance of a memory transfer operation,
2016 such as 'load'. DATA_COUNT is the number of bytes transferred.
2017 WRITE_COUNT is the number of separate write operations, or 0, if
2018 that information is not available. TIME is how long the operation
2022 print_transfer_performance (struct ui_file
*stream
,
2023 unsigned long data_count
,
2024 unsigned long write_count
,
2025 std::chrono::steady_clock::duration time
)
2027 using namespace std::chrono
;
2028 struct ui_out
*uiout
= current_uiout
;
2030 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2032 uiout
->text ("Transfer rate: ");
2033 if (ms
.count () > 0)
2035 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2037 if (uiout
->is_mi_like_p ())
2039 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2040 uiout
->text (" bits/sec");
2042 else if (rate
< 1024)
2044 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2045 uiout
->text (" bytes/sec");
2049 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2050 uiout
->text (" KB/sec");
2055 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2056 uiout
->text (" bits in <1 sec");
2058 if (write_count
> 0)
2061 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2062 uiout
->text (" bytes/write");
2064 uiout
->text (".\n");
2067 /* Add an OFFSET to the start address of each section in OBJF, except
2068 sections that were specified in ADDRS. */
2071 set_objfile_default_section_offset (struct objfile
*objf
,
2072 const section_addr_info
&addrs
,
2075 /* Add OFFSET to all sections by default. */
2076 std::vector
<struct section_offsets
> offsets (objf
->num_sections
,
2079 /* Create sorted lists of all sections in ADDRS as well as all
2080 sections in OBJF. */
2082 std::vector
<const struct other_sections
*> addrs_sorted
2083 = addrs_section_sort (addrs
);
2085 section_addr_info objf_addrs
2086 = build_section_addr_info_from_objfile (objf
);
2087 std::vector
<const struct other_sections
*> objf_addrs_sorted
2088 = addrs_section_sort (objf_addrs
);
2090 /* Walk the BFD section list, and if a matching section is found in
2091 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2094 Note that both lists may contain multiple sections with the same
2095 name, and then the sections from ADDRS are matched in BFD order
2096 (thanks to sectindex). */
2098 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2099 = addrs_sorted
.begin ();
2100 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2102 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2105 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2107 const struct other_sections
*sect
= *addrs_sorted_iter
;
2108 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2109 cmp
= strcmp (sect_name
, objf_name
);
2111 ++addrs_sorted_iter
;
2115 offsets
[objf_sect
->sectindex
].offsets
[0] = 0;
2118 /* Apply the new section offsets. */
2119 objfile_relocate (objf
, offsets
.data ());
2122 /* This function allows the addition of incrementally linked object files.
2123 It does not modify any state in the target, only in the debugger. */
2124 /* Note: ezannoni 2000-04-13 This function/command used to have a
2125 special case syntax for the rombug target (Rombug is the boot
2126 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2127 rombug case, the user doesn't need to supply a text address,
2128 instead a call to target_link() (in target.c) would supply the
2129 value to use. We are now discontinuing this type of ad hoc syntax. */
2132 add_symbol_file_command (const char *args
, int from_tty
)
2134 struct gdbarch
*gdbarch
= get_current_arch ();
2135 gdb::unique_xmalloc_ptr
<char> filename
;
2138 struct objfile
*objf
;
2139 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2140 symfile_add_flags add_flags
= 0;
2143 add_flags
|= SYMFILE_VERBOSE
;
2151 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2152 bool stop_processing_options
= false;
2153 CORE_ADDR offset
= 0;
2158 error (_("add-symbol-file takes a file name and an address"));
2160 bool seen_addr
= false;
2161 bool seen_offset
= false;
2162 gdb_argv
argv (args
);
2164 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2166 if (stop_processing_options
|| *arg
!= '-')
2168 if (filename
== NULL
)
2170 /* First non-option argument is always the filename. */
2171 filename
.reset (tilde_expand (arg
));
2173 else if (!seen_addr
)
2175 /* The second non-option argument is always the text
2176 address at which to load the program. */
2177 sect_opts
[0].value
= arg
;
2181 error (_("Unrecognized argument \"%s\""), arg
);
2183 else if (strcmp (arg
, "-readnow") == 0)
2184 flags
|= OBJF_READNOW
;
2185 else if (strcmp (arg
, "-readnever") == 0)
2186 flags
|= OBJF_READNEVER
;
2187 else if (strcmp (arg
, "-s") == 0)
2189 if (argv
[argcnt
+ 1] == NULL
)
2190 error (_("Missing section name after \"-s\""));
2191 else if (argv
[argcnt
+ 2] == NULL
)
2192 error (_("Missing section address after \"-s\""));
2194 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2196 sect_opts
.push_back (sect
);
2199 else if (strcmp (arg
, "-o") == 0)
2201 arg
= argv
[++argcnt
];
2203 error (_("Missing argument to -o"));
2205 offset
= parse_and_eval_address (arg
);
2208 else if (strcmp (arg
, "--") == 0)
2209 stop_processing_options
= true;
2211 error (_("Unrecognized argument \"%s\""), arg
);
2214 if (filename
== NULL
)
2215 error (_("You must provide a filename to be loaded."));
2217 validate_readnow_readnever (flags
);
2219 /* Print the prompt for the query below. And save the arguments into
2220 a sect_addr_info structure to be passed around to other
2221 functions. We have to split this up into separate print
2222 statements because hex_string returns a local static
2225 printf_unfiltered (_("add symbol table from file \"%s\""),
2227 section_addr_info section_addrs
;
2228 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2231 for (; it
!= sect_opts
.end (); ++it
)
2234 const char *val
= it
->value
;
2235 const char *sec
= it
->name
;
2237 if (section_addrs
.empty ())
2238 printf_unfiltered (_(" at\n"));
2239 addr
= parse_and_eval_address (val
);
2241 /* Here we store the section offsets in the order they were
2242 entered on the command line. Every array element is
2243 assigned an ascending section index to preserve the above
2244 order over an unstable sorting algorithm. This dummy
2245 index is not used for any other purpose.
2247 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2248 printf_filtered ("\t%s_addr = %s\n", sec
,
2249 paddress (gdbarch
, addr
));
2251 /* The object's sections are initialized when a
2252 call is made to build_objfile_section_table (objfile).
2253 This happens in reread_symbols.
2254 At this point, we don't know what file type this is,
2255 so we can't determine what section names are valid. */
2258 printf_unfiltered (_("%s offset by %s\n"),
2259 (section_addrs
.empty ()
2260 ? _(" with all sections")
2261 : _("with other sections")),
2262 paddress (gdbarch
, offset
));
2263 else if (section_addrs
.empty ())
2264 printf_unfiltered ("\n");
2266 if (from_tty
&& (!query ("%s", "")))
2267 error (_("Not confirmed."));
2269 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2273 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2275 add_target_sections_of_objfile (objf
);
2277 /* Getting new symbols may change our opinion about what is
2279 reinit_frame_cache ();
2283 /* This function removes a symbol file that was added via add-symbol-file. */
2286 remove_symbol_file_command (const char *args
, int from_tty
)
2288 struct objfile
*objf
= NULL
;
2289 struct program_space
*pspace
= current_program_space
;
2294 error (_("remove-symbol-file: no symbol file provided"));
2296 gdb_argv
argv (args
);
2298 if (strcmp (argv
[0], "-a") == 0)
2300 /* Interpret the next argument as an address. */
2303 if (argv
[1] == NULL
)
2304 error (_("Missing address argument"));
2306 if (argv
[2] != NULL
)
2307 error (_("Junk after %s"), argv
[1]);
2309 addr
= parse_and_eval_address (argv
[1]);
2313 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2314 && (objf
->flags
& OBJF_SHARED
) != 0
2315 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2319 else if (argv
[0] != NULL
)
2321 /* Interpret the current argument as a file name. */
2323 if (argv
[1] != NULL
)
2324 error (_("Junk after %s"), argv
[0]);
2326 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2330 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2331 && (objf
->flags
& OBJF_SHARED
) != 0
2332 && objf
->pspace
== pspace
2333 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2339 error (_("No symbol file found"));
2342 && !query (_("Remove symbol table from file \"%s\"? "),
2343 objfile_name (objf
)))
2344 error (_("Not confirmed."));
2347 clear_symtab_users (0);
2350 /* Re-read symbols if a symbol-file has changed. */
2353 reread_symbols (void)
2355 struct objfile
*objfile
;
2357 struct stat new_statbuf
;
2359 std::vector
<struct objfile
*> new_objfiles
;
2361 /* With the addition of shared libraries, this should be modified,
2362 the load time should be saved in the partial symbol tables, since
2363 different tables may come from different source files. FIXME.
2364 This routine should then walk down each partial symbol table
2365 and see if the symbol table that it originates from has been changed. */
2367 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2369 if (objfile
->obfd
== NULL
)
2372 /* Separate debug objfiles are handled in the main objfile. */
2373 if (objfile
->separate_debug_objfile_backlink
)
2376 /* If this object is from an archive (what you usually create with
2377 `ar', often called a `static library' on most systems, though
2378 a `shared library' on AIX is also an archive), then you should
2379 stat on the archive name, not member name. */
2380 if (objfile
->obfd
->my_archive
)
2381 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2383 res
= stat (objfile_name (objfile
), &new_statbuf
);
2386 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2387 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2388 objfile_name (objfile
));
2391 new_modtime
= new_statbuf
.st_mtime
;
2392 if (new_modtime
!= objfile
->mtime
)
2394 struct cleanup
*old_cleanups
;
2395 struct section_offsets
*offsets
;
2398 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2399 objfile_name (objfile
));
2401 /* There are various functions like symbol_file_add,
2402 symfile_bfd_open, syms_from_objfile, etc., which might
2403 appear to do what we want. But they have various other
2404 effects which we *don't* want. So we just do stuff
2405 ourselves. We don't worry about mapped files (for one thing,
2406 any mapped file will be out of date). */
2408 /* If we get an error, blow away this objfile (not sure if
2409 that is the correct response for things like shared
2411 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
2413 /* We need to do this whenever any symbols go away. */
2414 old_cleanups
= make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2416 if (exec_bfd
!= NULL
2417 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2418 bfd_get_filename (exec_bfd
)) == 0)
2420 /* Reload EXEC_BFD without asking anything. */
2422 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2425 /* Keep the calls order approx. the same as in free_objfile. */
2427 /* Free the separate debug objfiles. It will be
2428 automatically recreated by sym_read. */
2429 free_objfile_separate_debug (objfile
);
2431 /* Remove any references to this objfile in the global
2433 preserve_values (objfile
);
2435 /* Nuke all the state that we will re-read. Much of the following
2436 code which sets things to NULL really is necessary to tell
2437 other parts of GDB that there is nothing currently there.
2439 Try to keep the freeing order compatible with free_objfile. */
2441 if (objfile
->sf
!= NULL
)
2443 (*objfile
->sf
->sym_finish
) (objfile
);
2446 clear_objfile_data (objfile
);
2448 /* Clean up any state BFD has sitting around. */
2450 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2451 char *obfd_filename
;
2453 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2454 /* Open the new BFD before freeing the old one, so that
2455 the filename remains live. */
2456 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2457 objfile
->obfd
= temp
.release ();
2458 if (objfile
->obfd
== NULL
)
2459 error (_("Can't open %s to read symbols."), obfd_filename
);
2462 std::string original_name
= objfile
->original_name
;
2464 /* bfd_openr sets cacheable to true, which is what we want. */
2465 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2466 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2467 bfd_errmsg (bfd_get_error ()));
2469 /* Save the offsets, we will nuke them with the rest of the
2471 num_offsets
= objfile
->num_sections
;
2472 offsets
= ((struct section_offsets
*)
2473 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2474 memcpy (offsets
, objfile
->section_offsets
,
2475 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2477 /* FIXME: Do we have to free a whole linked list, or is this
2479 objfile
->global_psymbols
.clear ();
2480 objfile
->static_psymbols
.clear ();
2482 /* Free the obstacks for non-reusable objfiles. */
2483 psymbol_bcache_free (objfile
->psymbol_cache
);
2484 objfile
->psymbol_cache
= psymbol_bcache_init ();
2486 /* NB: after this call to obstack_free, objfiles_changed
2487 will need to be called (see discussion below). */
2488 obstack_free (&objfile
->objfile_obstack
, 0);
2489 objfile
->sections
= NULL
;
2490 objfile
->compunit_symtabs
= NULL
;
2491 objfile
->psymtabs
= NULL
;
2492 objfile
->psymtabs_addrmap
= NULL
;
2493 objfile
->free_psymtabs
= NULL
;
2494 objfile
->template_symbols
= NULL
;
2496 /* obstack_init also initializes the obstack so it is
2497 empty. We could use obstack_specify_allocation but
2498 gdb_obstack.h specifies the alloc/dealloc functions. */
2499 obstack_init (&objfile
->objfile_obstack
);
2501 /* set_objfile_per_bfd potentially allocates the per-bfd
2502 data on the objfile's obstack (if sharing data across
2503 multiple users is not possible), so it's important to
2504 do it *after* the obstack has been initialized. */
2505 set_objfile_per_bfd (objfile
);
2507 objfile
->original_name
2508 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
2509 original_name
.c_str (),
2510 original_name
.size ());
2512 /* Reset the sym_fns pointer. The ELF reader can change it
2513 based on whether .gdb_index is present, and we need it to
2514 start over. PR symtab/15885 */
2515 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2517 build_objfile_section_table (objfile
);
2518 terminate_minimal_symbol_table (objfile
);
2520 /* We use the same section offsets as from last time. I'm not
2521 sure whether that is always correct for shared libraries. */
2522 objfile
->section_offsets
= (struct section_offsets
*)
2523 obstack_alloc (&objfile
->objfile_obstack
,
2524 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2525 memcpy (objfile
->section_offsets
, offsets
,
2526 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2527 objfile
->num_sections
= num_offsets
;
2529 /* What the hell is sym_new_init for, anyway? The concept of
2530 distinguishing between the main file and additional files
2531 in this way seems rather dubious. */
2532 if (objfile
== symfile_objfile
)
2534 (*objfile
->sf
->sym_new_init
) (objfile
);
2537 (*objfile
->sf
->sym_init
) (objfile
);
2538 clear_complaints (1);
2540 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2542 /* We are about to read new symbols and potentially also
2543 DWARF information. Some targets may want to pass addresses
2544 read from DWARF DIE's through an adjustment function before
2545 saving them, like MIPS, which may call into
2546 "find_pc_section". When called, that function will make
2547 use of per-objfile program space data.
2549 Since we discarded our section information above, we have
2550 dangling pointers in the per-objfile program space data
2551 structure. Force GDB to update the section mapping
2552 information by letting it know the objfile has changed,
2553 making the dangling pointers point to correct data
2556 objfiles_changed ();
2558 read_symbols (objfile
, 0);
2560 if (!objfile_has_symbols (objfile
))
2563 printf_filtered (_("(no debugging symbols found)\n"));
2567 /* We're done reading the symbol file; finish off complaints. */
2568 clear_complaints (0);
2570 /* Getting new symbols may change our opinion about what is
2573 reinit_frame_cache ();
2575 /* Discard cleanups as symbol reading was successful. */
2576 objfile_holder
.release ();
2577 discard_cleanups (old_cleanups
);
2579 /* If the mtime has changed between the time we set new_modtime
2580 and now, we *want* this to be out of date, so don't call stat
2582 objfile
->mtime
= new_modtime
;
2583 init_entry_point_info (objfile
);
2585 new_objfiles
.push_back (objfile
);
2589 if (!new_objfiles
.empty ())
2591 clear_symtab_users (0);
2593 /* clear_objfile_data for each objfile was called before freeing it and
2594 gdb::observers::new_objfile.notify (NULL) has been called by
2595 clear_symtab_users above. Notify the new files now. */
2596 for (auto iter
: new_objfiles
)
2597 gdb::observers::new_objfile
.notify (iter
);
2599 /* At least one objfile has changed, so we can consider that
2600 the executable we're debugging has changed too. */
2601 gdb::observers::executable_changed
.notify ();
2606 struct filename_language
2608 filename_language (const std::string
&ext_
, enum language lang_
)
2609 : ext (ext_
), lang (lang_
)
2616 static std::vector
<filename_language
> filename_language_table
;
2618 /* See symfile.h. */
2621 add_filename_language (const char *ext
, enum language lang
)
2623 filename_language_table
.emplace_back (ext
, lang
);
2626 static char *ext_args
;
2628 show_ext_args (struct ui_file
*file
, int from_tty
,
2629 struct cmd_list_element
*c
, const char *value
)
2631 fprintf_filtered (file
,
2632 _("Mapping between filename extension "
2633 "and source language is \"%s\".\n"),
2638 set_ext_lang_command (const char *args
,
2639 int from_tty
, struct cmd_list_element
*e
)
2641 char *cp
= ext_args
;
2644 /* First arg is filename extension, starting with '.' */
2646 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2648 /* Find end of first arg. */
2649 while (*cp
&& !isspace (*cp
))
2653 error (_("'%s': two arguments required -- "
2654 "filename extension and language"),
2657 /* Null-terminate first arg. */
2660 /* Find beginning of second arg, which should be a source language. */
2661 cp
= skip_spaces (cp
);
2664 error (_("'%s': two arguments required -- "
2665 "filename extension and language"),
2668 /* Lookup the language from among those we know. */
2669 lang
= language_enum (cp
);
2671 auto it
= filename_language_table
.begin ();
2672 /* Now lookup the filename extension: do we already know it? */
2673 for (; it
!= filename_language_table
.end (); it
++)
2675 if (it
->ext
== ext_args
)
2679 if (it
== filename_language_table
.end ())
2681 /* New file extension. */
2682 add_filename_language (ext_args
, lang
);
2686 /* Redefining a previously known filename extension. */
2689 /* query ("Really make files of type %s '%s'?", */
2690 /* ext_args, language_str (lang)); */
2697 info_ext_lang_command (const char *args
, int from_tty
)
2699 printf_filtered (_("Filename extensions and the languages they represent:"));
2700 printf_filtered ("\n\n");
2701 for (const filename_language
&entry
: filename_language_table
)
2702 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2703 language_str (entry
.lang
));
2707 deduce_language_from_filename (const char *filename
)
2711 if (filename
!= NULL
)
2712 if ((cp
= strrchr (filename
, '.')) != NULL
)
2714 for (const filename_language
&entry
: filename_language_table
)
2715 if (entry
.ext
== cp
)
2719 return language_unknown
;
2722 /* Allocate and initialize a new symbol table.
2723 CUST is from the result of allocate_compunit_symtab. */
2726 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2728 struct objfile
*objfile
= cust
->objfile
;
2729 struct symtab
*symtab
2730 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2733 = (const char *) bcache (filename
, strlen (filename
) + 1,
2734 objfile
->per_bfd
->filename_cache
);
2735 symtab
->fullname
= NULL
;
2736 symtab
->language
= deduce_language_from_filename (filename
);
2738 /* This can be very verbose with lots of headers.
2739 Only print at higher debug levels. */
2740 if (symtab_create_debug
>= 2)
2742 /* Be a bit clever with debugging messages, and don't print objfile
2743 every time, only when it changes. */
2744 static char *last_objfile_name
= NULL
;
2746 if (last_objfile_name
== NULL
2747 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2749 xfree (last_objfile_name
);
2750 last_objfile_name
= xstrdup (objfile_name (objfile
));
2751 fprintf_filtered (gdb_stdlog
,
2752 "Creating one or more symtabs for objfile %s ...\n",
2755 fprintf_filtered (gdb_stdlog
,
2756 "Created symtab %s for module %s.\n",
2757 host_address_to_string (symtab
), filename
);
2760 /* Add it to CUST's list of symtabs. */
2761 if (cust
->filetabs
== NULL
)
2763 cust
->filetabs
= symtab
;
2764 cust
->last_filetab
= symtab
;
2768 cust
->last_filetab
->next
= symtab
;
2769 cust
->last_filetab
= symtab
;
2772 /* Backlink to the containing compunit symtab. */
2773 symtab
->compunit_symtab
= cust
;
2778 /* Allocate and initialize a new compunit.
2779 NAME is the name of the main source file, if there is one, or some
2780 descriptive text if there are no source files. */
2782 struct compunit_symtab
*
2783 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2785 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2786 struct compunit_symtab
);
2787 const char *saved_name
;
2789 cu
->objfile
= objfile
;
2791 /* The name we record here is only for display/debugging purposes.
2792 Just save the basename to avoid path issues (too long for display,
2793 relative vs absolute, etc.). */
2794 saved_name
= lbasename (name
);
2796 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2797 strlen (saved_name
));
2799 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2801 if (symtab_create_debug
)
2803 fprintf_filtered (gdb_stdlog
,
2804 "Created compunit symtab %s for %s.\n",
2805 host_address_to_string (cu
),
2812 /* Hook CU to the objfile it comes from. */
2815 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2817 cu
->next
= cu
->objfile
->compunit_symtabs
;
2818 cu
->objfile
->compunit_symtabs
= cu
;
2822 /* Reset all data structures in gdb which may contain references to
2823 symbol table data. */
2826 clear_symtab_users (symfile_add_flags add_flags
)
2828 /* Someday, we should do better than this, by only blowing away
2829 the things that really need to be blown. */
2831 /* Clear the "current" symtab first, because it is no longer valid.
2832 breakpoint_re_set may try to access the current symtab. */
2833 clear_current_source_symtab_and_line ();
2836 clear_last_displayed_sal ();
2837 clear_pc_function_cache ();
2838 gdb::observers::new_objfile
.notify (NULL
);
2840 /* Clear globals which might have pointed into a removed objfile.
2841 FIXME: It's not clear which of these are supposed to persist
2842 between expressions and which ought to be reset each time. */
2843 expression_context_block
= NULL
;
2844 innermost_block
.reset ();
2846 /* Varobj may refer to old symbols, perform a cleanup. */
2847 varobj_invalidate ();
2849 /* Now that the various caches have been cleared, we can re_set
2850 our breakpoints without risking it using stale data. */
2851 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2852 breakpoint_re_set ();
2856 clear_symtab_users_cleanup (void *ignore
)
2858 clear_symtab_users (0);
2862 The following code implements an abstraction for debugging overlay sections.
2864 The target model is as follows:
2865 1) The gnu linker will permit multiple sections to be mapped into the
2866 same VMA, each with its own unique LMA (or load address).
2867 2) It is assumed that some runtime mechanism exists for mapping the
2868 sections, one by one, from the load address into the VMA address.
2869 3) This code provides a mechanism for gdb to keep track of which
2870 sections should be considered to be mapped from the VMA to the LMA.
2871 This information is used for symbol lookup, and memory read/write.
2872 For instance, if a section has been mapped then its contents
2873 should be read from the VMA, otherwise from the LMA.
2875 Two levels of debugger support for overlays are available. One is
2876 "manual", in which the debugger relies on the user to tell it which
2877 overlays are currently mapped. This level of support is
2878 implemented entirely in the core debugger, and the information about
2879 whether a section is mapped is kept in the objfile->obj_section table.
2881 The second level of support is "automatic", and is only available if
2882 the target-specific code provides functionality to read the target's
2883 overlay mapping table, and translate its contents for the debugger
2884 (by updating the mapped state information in the obj_section tables).
2886 The interface is as follows:
2888 overlay map <name> -- tell gdb to consider this section mapped
2889 overlay unmap <name> -- tell gdb to consider this section unmapped
2890 overlay list -- list the sections that GDB thinks are mapped
2891 overlay read-target -- get the target's state of what's mapped
2892 overlay off/manual/auto -- set overlay debugging state
2893 Functional interface:
2894 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2895 section, return that section.
2896 find_pc_overlay(pc): find any overlay section that contains
2897 the pc, either in its VMA or its LMA
2898 section_is_mapped(sect): true if overlay is marked as mapped
2899 section_is_overlay(sect): true if section's VMA != LMA
2900 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2901 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2902 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2903 overlay_mapped_address(...): map an address from section's LMA to VMA
2904 overlay_unmapped_address(...): map an address from section's VMA to LMA
2905 symbol_overlayed_address(...): Return a "current" address for symbol:
2906 either in VMA or LMA depending on whether
2907 the symbol's section is currently mapped. */
2909 /* Overlay debugging state: */
2911 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2912 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2914 /* Function: section_is_overlay (SECTION)
2915 Returns true if SECTION has VMA not equal to LMA, ie.
2916 SECTION is loaded at an address different from where it will "run". */
2919 section_is_overlay (struct obj_section
*section
)
2921 if (overlay_debugging
&& section
)
2923 asection
*bfd_section
= section
->the_bfd_section
;
2925 if (bfd_section_lma (abfd
, bfd_section
) != 0
2926 && bfd_section_lma (abfd
, bfd_section
)
2927 != bfd_section_vma (abfd
, bfd_section
))
2934 /* Function: overlay_invalidate_all (void)
2935 Invalidate the mapped state of all overlay sections (mark it as stale). */
2938 overlay_invalidate_all (void)
2940 struct objfile
*objfile
;
2941 struct obj_section
*sect
;
2943 ALL_OBJSECTIONS (objfile
, sect
)
2944 if (section_is_overlay (sect
))
2945 sect
->ovly_mapped
= -1;
2948 /* Function: section_is_mapped (SECTION)
2949 Returns true if section is an overlay, and is currently mapped.
2951 Access to the ovly_mapped flag is restricted to this function, so
2952 that we can do automatic update. If the global flag
2953 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2954 overlay_invalidate_all. If the mapped state of the particular
2955 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2958 section_is_mapped (struct obj_section
*osect
)
2960 struct gdbarch
*gdbarch
;
2962 if (osect
== 0 || !section_is_overlay (osect
))
2965 switch (overlay_debugging
)
2969 return 0; /* overlay debugging off */
2970 case ovly_auto
: /* overlay debugging automatic */
2971 /* Unles there is a gdbarch_overlay_update function,
2972 there's really nothing useful to do here (can't really go auto). */
2973 gdbarch
= get_objfile_arch (osect
->objfile
);
2974 if (gdbarch_overlay_update_p (gdbarch
))
2976 if (overlay_cache_invalid
)
2978 overlay_invalidate_all ();
2979 overlay_cache_invalid
= 0;
2981 if (osect
->ovly_mapped
== -1)
2982 gdbarch_overlay_update (gdbarch
, osect
);
2985 case ovly_on
: /* overlay debugging manual */
2986 return osect
->ovly_mapped
== 1;
2990 /* Function: pc_in_unmapped_range
2991 If PC falls into the lma range of SECTION, return true, else false. */
2994 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
2996 if (section_is_overlay (section
))
2998 bfd
*abfd
= section
->objfile
->obfd
;
2999 asection
*bfd_section
= section
->the_bfd_section
;
3001 /* We assume the LMA is relocated by the same offset as the VMA. */
3002 bfd_vma size
= bfd_get_section_size (bfd_section
);
3003 CORE_ADDR offset
= obj_section_offset (section
);
3005 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3006 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3013 /* Function: pc_in_mapped_range
3014 If PC falls into the vma range of SECTION, return true, else false. */
3017 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3019 if (section_is_overlay (section
))
3021 if (obj_section_addr (section
) <= pc
3022 && pc
< obj_section_endaddr (section
))
3029 /* Return true if the mapped ranges of sections A and B overlap, false
3033 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3035 CORE_ADDR a_start
= obj_section_addr (a
);
3036 CORE_ADDR a_end
= obj_section_endaddr (a
);
3037 CORE_ADDR b_start
= obj_section_addr (b
);
3038 CORE_ADDR b_end
= obj_section_endaddr (b
);
3040 return (a_start
< b_end
&& b_start
< a_end
);
3043 /* Function: overlay_unmapped_address (PC, SECTION)
3044 Returns the address corresponding to PC in the unmapped (load) range.
3045 May be the same as PC. */
3048 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3050 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3052 asection
*bfd_section
= section
->the_bfd_section
;
3054 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3055 - bfd_section_vma (abfd
, bfd_section
);
3061 /* Function: overlay_mapped_address (PC, SECTION)
3062 Returns the address corresponding to PC in the mapped (runtime) range.
3063 May be the same as PC. */
3066 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3068 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3070 asection
*bfd_section
= section
->the_bfd_section
;
3072 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3073 - bfd_section_lma (abfd
, bfd_section
);
3079 /* Function: symbol_overlayed_address
3080 Return one of two addresses (relative to the VMA or to the LMA),
3081 depending on whether the section is mapped or not. */
3084 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3086 if (overlay_debugging
)
3088 /* If the symbol has no section, just return its regular address. */
3091 /* If the symbol's section is not an overlay, just return its
3093 if (!section_is_overlay (section
))
3095 /* If the symbol's section is mapped, just return its address. */
3096 if (section_is_mapped (section
))
3099 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3100 * then return its LOADED address rather than its vma address!!
3102 return overlay_unmapped_address (address
, section
);
3107 /* Function: find_pc_overlay (PC)
3108 Return the best-match overlay section for PC:
3109 If PC matches a mapped overlay section's VMA, return that section.
3110 Else if PC matches an unmapped section's VMA, return that section.
3111 Else if PC matches an unmapped section's LMA, return that section. */
3113 struct obj_section
*
3114 find_pc_overlay (CORE_ADDR pc
)
3116 struct objfile
*objfile
;
3117 struct obj_section
*osect
, *best_match
= NULL
;
3119 if (overlay_debugging
)
3121 ALL_OBJSECTIONS (objfile
, osect
)
3122 if (section_is_overlay (osect
))
3124 if (pc_in_mapped_range (pc
, osect
))
3126 if (section_is_mapped (osect
))
3131 else if (pc_in_unmapped_range (pc
, osect
))
3138 /* Function: find_pc_mapped_section (PC)
3139 If PC falls into the VMA address range of an overlay section that is
3140 currently marked as MAPPED, return that section. Else return NULL. */
3142 struct obj_section
*
3143 find_pc_mapped_section (CORE_ADDR pc
)
3145 struct objfile
*objfile
;
3146 struct obj_section
*osect
;
3148 if (overlay_debugging
)
3150 ALL_OBJSECTIONS (objfile
, osect
)
3151 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3158 /* Function: list_overlays_command
3159 Print a list of mapped sections and their PC ranges. */
3162 list_overlays_command (const char *args
, int from_tty
)
3165 struct objfile
*objfile
;
3166 struct obj_section
*osect
;
3168 if (overlay_debugging
)
3170 ALL_OBJSECTIONS (objfile
, osect
)
3171 if (section_is_mapped (osect
))
3173 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3178 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3179 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3180 size
= bfd_get_section_size (osect
->the_bfd_section
);
3181 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3183 printf_filtered ("Section %s, loaded at ", name
);
3184 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3185 puts_filtered (" - ");
3186 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3187 printf_filtered (", mapped at ");
3188 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3189 puts_filtered (" - ");
3190 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3191 puts_filtered ("\n");
3197 printf_filtered (_("No sections are mapped.\n"));
3200 /* Function: map_overlay_command
3201 Mark the named section as mapped (ie. residing at its VMA address). */
3204 map_overlay_command (const char *args
, int from_tty
)
3206 struct objfile
*objfile
, *objfile2
;
3207 struct obj_section
*sec
, *sec2
;
3209 if (!overlay_debugging
)
3210 error (_("Overlay debugging not enabled. Use "
3211 "either the 'overlay auto' or\n"
3212 "the 'overlay manual' command."));
3214 if (args
== 0 || *args
== 0)
3215 error (_("Argument required: name of an overlay section"));
3217 /* First, find a section matching the user supplied argument. */
3218 ALL_OBJSECTIONS (objfile
, sec
)
3219 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3221 /* Now, check to see if the section is an overlay. */
3222 if (!section_is_overlay (sec
))
3223 continue; /* not an overlay section */
3225 /* Mark the overlay as "mapped". */
3226 sec
->ovly_mapped
= 1;
3228 /* Next, make a pass and unmap any sections that are
3229 overlapped by this new section: */
3230 ALL_OBJSECTIONS (objfile2
, sec2
)
3231 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3234 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3235 bfd_section_name (objfile
->obfd
,
3236 sec2
->the_bfd_section
));
3237 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3241 error (_("No overlay section called %s"), args
);
3244 /* Function: unmap_overlay_command
3245 Mark the overlay section as unmapped
3246 (ie. resident in its LMA address range, rather than the VMA range). */
3249 unmap_overlay_command (const char *args
, int from_tty
)
3251 struct objfile
*objfile
;
3252 struct obj_section
*sec
= NULL
;
3254 if (!overlay_debugging
)
3255 error (_("Overlay debugging not enabled. "
3256 "Use either the 'overlay auto' or\n"
3257 "the 'overlay manual' command."));
3259 if (args
== 0 || *args
== 0)
3260 error (_("Argument required: name of an overlay section"));
3262 /* First, find a section matching the user supplied argument. */
3263 ALL_OBJSECTIONS (objfile
, sec
)
3264 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3266 if (!sec
->ovly_mapped
)
3267 error (_("Section %s is not mapped"), args
);
3268 sec
->ovly_mapped
= 0;
3271 error (_("No overlay section called %s"), args
);
3274 /* Function: overlay_auto_command
3275 A utility command to turn on overlay debugging.
3276 Possibly this should be done via a set/show command. */
3279 overlay_auto_command (const char *args
, int from_tty
)
3281 overlay_debugging
= ovly_auto
;
3282 enable_overlay_breakpoints ();
3284 printf_unfiltered (_("Automatic overlay debugging enabled."));
3287 /* Function: overlay_manual_command
3288 A utility command to turn on overlay debugging.
3289 Possibly this should be done via a set/show command. */
3292 overlay_manual_command (const char *args
, int from_tty
)
3294 overlay_debugging
= ovly_on
;
3295 disable_overlay_breakpoints ();
3297 printf_unfiltered (_("Overlay debugging enabled."));
3300 /* Function: overlay_off_command
3301 A utility command to turn on overlay debugging.
3302 Possibly this should be done via a set/show command. */
3305 overlay_off_command (const char *args
, int from_tty
)
3307 overlay_debugging
= ovly_off
;
3308 disable_overlay_breakpoints ();
3310 printf_unfiltered (_("Overlay debugging disabled."));
3314 overlay_load_command (const char *args
, int from_tty
)
3316 struct gdbarch
*gdbarch
= get_current_arch ();
3318 if (gdbarch_overlay_update_p (gdbarch
))
3319 gdbarch_overlay_update (gdbarch
, NULL
);
3321 error (_("This target does not know how to read its overlay state."));
3324 /* Function: overlay_command
3325 A place-holder for a mis-typed command. */
3327 /* Command list chain containing all defined "overlay" subcommands. */
3328 static struct cmd_list_element
*overlaylist
;
3331 overlay_command (const char *args
, int from_tty
)
3334 ("\"overlay\" must be followed by the name of an overlay command.\n");
3335 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3338 /* Target Overlays for the "Simplest" overlay manager:
3340 This is GDB's default target overlay layer. It works with the
3341 minimal overlay manager supplied as an example by Cygnus. The
3342 entry point is via a function pointer "gdbarch_overlay_update",
3343 so targets that use a different runtime overlay manager can
3344 substitute their own overlay_update function and take over the
3347 The overlay_update function pokes around in the target's data structures
3348 to see what overlays are mapped, and updates GDB's overlay mapping with
3351 In this simple implementation, the target data structures are as follows:
3352 unsigned _novlys; /# number of overlay sections #/
3353 unsigned _ovly_table[_novlys][4] = {
3354 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3355 {..., ..., ..., ...},
3357 unsigned _novly_regions; /# number of overlay regions #/
3358 unsigned _ovly_region_table[_novly_regions][3] = {
3359 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3362 These functions will attempt to update GDB's mappedness state in the
3363 symbol section table, based on the target's mappedness state.
3365 To do this, we keep a cached copy of the target's _ovly_table, and
3366 attempt to detect when the cached copy is invalidated. The main
3367 entry point is "simple_overlay_update(SECT), which looks up SECT in
3368 the cached table and re-reads only the entry for that section from
3369 the target (whenever possible). */
3371 /* Cached, dynamically allocated copies of the target data structures: */
3372 static unsigned (*cache_ovly_table
)[4] = 0;
3373 static unsigned cache_novlys
= 0;
3374 static CORE_ADDR cache_ovly_table_base
= 0;
3377 VMA
, OSIZE
, LMA
, MAPPED
3380 /* Throw away the cached copy of _ovly_table. */
3383 simple_free_overlay_table (void)
3385 if (cache_ovly_table
)
3386 xfree (cache_ovly_table
);
3388 cache_ovly_table
= NULL
;
3389 cache_ovly_table_base
= 0;
3392 /* Read an array of ints of size SIZE from the target into a local buffer.
3393 Convert to host order. int LEN is number of ints. */
3396 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3397 int len
, int size
, enum bfd_endian byte_order
)
3399 /* FIXME (alloca): Not safe if array is very large. */
3400 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3403 read_memory (memaddr
, buf
, len
* size
);
3404 for (i
= 0; i
< len
; i
++)
3405 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3408 /* Find and grab a copy of the target _ovly_table
3409 (and _novlys, which is needed for the table's size). */
3412 simple_read_overlay_table (void)
3414 struct bound_minimal_symbol novlys_msym
;
3415 struct bound_minimal_symbol ovly_table_msym
;
3416 struct gdbarch
*gdbarch
;
3418 enum bfd_endian byte_order
;
3420 simple_free_overlay_table ();
3421 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3422 if (! novlys_msym
.minsym
)
3424 error (_("Error reading inferior's overlay table: "
3425 "couldn't find `_novlys' variable\n"
3426 "in inferior. Use `overlay manual' mode."));
3430 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3431 if (! ovly_table_msym
.minsym
)
3433 error (_("Error reading inferior's overlay table: couldn't find "
3434 "`_ovly_table' array\n"
3435 "in inferior. Use `overlay manual' mode."));
3439 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3440 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3441 byte_order
= gdbarch_byte_order (gdbarch
);
3443 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3446 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3447 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3448 read_target_long_array (cache_ovly_table_base
,
3449 (unsigned int *) cache_ovly_table
,
3450 cache_novlys
* 4, word_size
, byte_order
);
3452 return 1; /* SUCCESS */
3455 /* Function: simple_overlay_update_1
3456 A helper function for simple_overlay_update. Assuming a cached copy
3457 of _ovly_table exists, look through it to find an entry whose vma,
3458 lma and size match those of OSECT. Re-read the entry and make sure
3459 it still matches OSECT (else the table may no longer be valid).
3460 Set OSECT's mapped state to match the entry. Return: 1 for
3461 success, 0 for failure. */
3464 simple_overlay_update_1 (struct obj_section
*osect
)
3467 asection
*bsect
= osect
->the_bfd_section
;
3468 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3469 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3470 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3472 for (i
= 0; i
< cache_novlys
; i
++)
3473 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3474 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3476 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3477 (unsigned int *) cache_ovly_table
[i
],
3478 4, word_size
, byte_order
);
3479 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3480 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3482 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3485 else /* Warning! Warning! Target's ovly table has changed! */
3491 /* Function: simple_overlay_update
3492 If OSECT is NULL, then update all sections' mapped state
3493 (after re-reading the entire target _ovly_table).
3494 If OSECT is non-NULL, then try to find a matching entry in the
3495 cached ovly_table and update only OSECT's mapped state.
3496 If a cached entry can't be found or the cache isn't valid, then
3497 re-read the entire cache, and go ahead and update all sections. */
3500 simple_overlay_update (struct obj_section
*osect
)
3502 struct objfile
*objfile
;
3504 /* Were we given an osect to look up? NULL means do all of them. */
3506 /* Have we got a cached copy of the target's overlay table? */
3507 if (cache_ovly_table
!= NULL
)
3509 /* Does its cached location match what's currently in the
3511 struct bound_minimal_symbol minsym
3512 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3514 if (minsym
.minsym
== NULL
)
3515 error (_("Error reading inferior's overlay table: couldn't "
3516 "find `_ovly_table' array\n"
3517 "in inferior. Use `overlay manual' mode."));
3519 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3520 /* Then go ahead and try to look up this single section in
3522 if (simple_overlay_update_1 (osect
))
3523 /* Found it! We're done. */
3527 /* Cached table no good: need to read the entire table anew.
3528 Or else we want all the sections, in which case it's actually
3529 more efficient to read the whole table in one block anyway. */
3531 if (! simple_read_overlay_table ())
3534 /* Now may as well update all sections, even if only one was requested. */
3535 ALL_OBJSECTIONS (objfile
, osect
)
3536 if (section_is_overlay (osect
))
3539 asection
*bsect
= osect
->the_bfd_section
;
3541 for (i
= 0; i
< cache_novlys
; i
++)
3542 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3543 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3544 { /* obj_section matches i'th entry in ovly_table. */
3545 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3546 break; /* finished with inner for loop: break out. */
3551 /* Set the output sections and output offsets for section SECTP in
3552 ABFD. The relocation code in BFD will read these offsets, so we
3553 need to be sure they're initialized. We map each section to itself,
3554 with no offset; this means that SECTP->vma will be honored. */
3557 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3559 sectp
->output_section
= sectp
;
3560 sectp
->output_offset
= 0;
3563 /* Default implementation for sym_relocate. */
3566 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3569 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3571 bfd
*abfd
= sectp
->owner
;
3573 /* We're only interested in sections with relocation
3575 if ((sectp
->flags
& SEC_RELOC
) == 0)
3578 /* We will handle section offsets properly elsewhere, so relocate as if
3579 all sections begin at 0. */
3580 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3582 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3585 /* Relocate the contents of a debug section SECTP in ABFD. The
3586 contents are stored in BUF if it is non-NULL, or returned in a
3587 malloc'd buffer otherwise.
3589 For some platforms and debug info formats, shared libraries contain
3590 relocations against the debug sections (particularly for DWARF-2;
3591 one affected platform is PowerPC GNU/Linux, although it depends on
3592 the version of the linker in use). Also, ELF object files naturally
3593 have unresolved relocations for their debug sections. We need to apply
3594 the relocations in order to get the locations of symbols correct.
3595 Another example that may require relocation processing, is the
3596 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3600 symfile_relocate_debug_section (struct objfile
*objfile
,
3601 asection
*sectp
, bfd_byte
*buf
)
3603 gdb_assert (objfile
->sf
->sym_relocate
);
3605 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3608 struct symfile_segment_data
*
3609 get_symfile_segment_data (bfd
*abfd
)
3611 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3616 return sf
->sym_segments (abfd
);
3620 free_symfile_segment_data (struct symfile_segment_data
*data
)
3622 xfree (data
->segment_bases
);
3623 xfree (data
->segment_sizes
);
3624 xfree (data
->segment_info
);
3629 - DATA, containing segment addresses from the object file ABFD, and
3630 the mapping from ABFD's sections onto the segments that own them,
3632 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3633 segment addresses reported by the target,
3634 store the appropriate offsets for each section in OFFSETS.
3636 If there are fewer entries in SEGMENT_BASES than there are segments
3637 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3639 If there are more entries, then ignore the extra. The target may
3640 not be able to distinguish between an empty data segment and a
3641 missing data segment; a missing text segment is less plausible. */
3644 symfile_map_offsets_to_segments (bfd
*abfd
,
3645 const struct symfile_segment_data
*data
,
3646 struct section_offsets
*offsets
,
3647 int num_segment_bases
,
3648 const CORE_ADDR
*segment_bases
)
3653 /* It doesn't make sense to call this function unless you have some
3654 segment base addresses. */
3655 gdb_assert (num_segment_bases
> 0);
3657 /* If we do not have segment mappings for the object file, we
3658 can not relocate it by segments. */
3659 gdb_assert (data
!= NULL
);
3660 gdb_assert (data
->num_segments
> 0);
3662 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3664 int which
= data
->segment_info
[i
];
3666 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3668 /* Don't bother computing offsets for sections that aren't
3669 loaded as part of any segment. */
3673 /* Use the last SEGMENT_BASES entry as the address of any extra
3674 segments mentioned in DATA->segment_info. */
3675 if (which
> num_segment_bases
)
3676 which
= num_segment_bases
;
3678 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3679 - data
->segment_bases
[which
- 1]);
3686 symfile_find_segment_sections (struct objfile
*objfile
)
3688 bfd
*abfd
= objfile
->obfd
;
3691 struct symfile_segment_data
*data
;
3693 data
= get_symfile_segment_data (objfile
->obfd
);
3697 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3699 free_symfile_segment_data (data
);
3703 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3705 int which
= data
->segment_info
[i
];
3709 if (objfile
->sect_index_text
== -1)
3710 objfile
->sect_index_text
= sect
->index
;
3712 if (objfile
->sect_index_rodata
== -1)
3713 objfile
->sect_index_rodata
= sect
->index
;
3715 else if (which
== 2)
3717 if (objfile
->sect_index_data
== -1)
3718 objfile
->sect_index_data
= sect
->index
;
3720 if (objfile
->sect_index_bss
== -1)
3721 objfile
->sect_index_bss
= sect
->index
;
3725 free_symfile_segment_data (data
);
3728 /* Listen for free_objfile events. */
3731 symfile_free_objfile (struct objfile
*objfile
)
3733 /* Remove the target sections owned by this objfile. */
3734 if (objfile
!= NULL
)
3735 remove_target_sections ((void *) objfile
);
3738 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3739 Expand all symtabs that match the specified criteria.
3740 See quick_symbol_functions.expand_symtabs_matching for details. */
3743 expand_symtabs_matching
3744 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3745 const lookup_name_info
&lookup_name
,
3746 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3747 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3748 enum search_domain kind
)
3750 struct objfile
*objfile
;
3752 ALL_OBJFILES (objfile
)
3755 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3758 expansion_notify
, kind
);
3762 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3763 Map function FUN over every file.
3764 See quick_symbol_functions.map_symbol_filenames for details. */
3767 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3770 struct objfile
*objfile
;
3772 ALL_OBJFILES (objfile
)
3775 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3782 namespace selftests
{
3783 namespace filename_language
{
3785 static void test_filename_language ()
3787 /* This test messes up the filename_language_table global. */
3788 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3790 /* Test deducing an unknown extension. */
3791 language lang
= deduce_language_from_filename ("myfile.blah");
3792 SELF_CHECK (lang
== language_unknown
);
3794 /* Test deducing a known extension. */
3795 lang
= deduce_language_from_filename ("myfile.c");
3796 SELF_CHECK (lang
== language_c
);
3798 /* Test adding a new extension using the internal API. */
3799 add_filename_language (".blah", language_pascal
);
3800 lang
= deduce_language_from_filename ("myfile.blah");
3801 SELF_CHECK (lang
== language_pascal
);
3805 test_set_ext_lang_command ()
3807 /* This test messes up the filename_language_table global. */
3808 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3810 /* Confirm that the .hello extension is not known. */
3811 language lang
= deduce_language_from_filename ("cake.hello");
3812 SELF_CHECK (lang
== language_unknown
);
3814 /* Test adding a new extension using the CLI command. */
3815 gdb::unique_xmalloc_ptr
<char> args_holder (xstrdup (".hello rust"));
3816 ext_args
= args_holder
.get ();
3817 set_ext_lang_command (NULL
, 1, NULL
);
3819 lang
= deduce_language_from_filename ("cake.hello");
3820 SELF_CHECK (lang
== language_rust
);
3822 /* Test overriding an existing extension using the CLI command. */
3823 int size_before
= filename_language_table
.size ();
3824 args_holder
.reset (xstrdup (".hello pascal"));
3825 ext_args
= args_holder
.get ();
3826 set_ext_lang_command (NULL
, 1, NULL
);
3827 int size_after
= filename_language_table
.size ();
3829 lang
= deduce_language_from_filename ("cake.hello");
3830 SELF_CHECK (lang
== language_pascal
);
3831 SELF_CHECK (size_before
== size_after
);
3834 } /* namespace filename_language */
3835 } /* namespace selftests */
3837 #endif /* GDB_SELF_TEST */
3840 _initialize_symfile (void)
3842 struct cmd_list_element
*c
;
3844 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3846 #define READNOW_READNEVER_HELP \
3847 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3848 immediately. This makes the command slower, but may make future operations\n\
3850 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3851 symbolic debug information."
3853 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3854 Load symbol table from executable file FILE.\n\
3855 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3856 OFF is an optional offset which is added to each section address.\n\
3857 The `file' command can also load symbol tables, as well as setting the file\n\
3858 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3859 set_cmd_completer (c
, filename_completer
);
3861 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3862 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3863 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3864 [-s SECT-NAME SECT-ADDR]...\n\
3865 ADDR is the starting address of the file's text.\n\
3866 Each '-s' argument provides a section name and address, and\n\
3867 should be specified if the data and bss segments are not contiguous\n\
3868 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3869 OFF is an optional offset which is added to the default load addresses\n\
3870 of all sections for which no other address was specified.\n"
3871 READNOW_READNEVER_HELP
),
3873 set_cmd_completer (c
, filename_completer
);
3875 c
= add_cmd ("remove-symbol-file", class_files
,
3876 remove_symbol_file_command
, _("\
3877 Remove a symbol file added via the add-symbol-file command.\n\
3878 Usage: remove-symbol-file FILENAME\n\
3879 remove-symbol-file -a ADDRESS\n\
3880 The file to remove can be identified by its filename or by an address\n\
3881 that lies within the boundaries of this symbol file in memory."),
3884 c
= add_cmd ("load", class_files
, load_command
, _("\
3885 Dynamically load FILE into the running program, and record its symbols\n\
3886 for access from GDB.\n\
3887 Usage: load [FILE] [OFFSET]\n\
3888 An optional load OFFSET may also be given as a literal address.\n\
3889 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3890 on its own."), &cmdlist
);
3891 set_cmd_completer (c
, filename_completer
);
3893 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3894 _("Commands for debugging overlays."), &overlaylist
,
3895 "overlay ", 0, &cmdlist
);
3897 add_com_alias ("ovly", "overlay", class_alias
, 1);
3898 add_com_alias ("ov", "overlay", class_alias
, 1);
3900 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3901 _("Assert that an overlay section is mapped."), &overlaylist
);
3903 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3904 _("Assert that an overlay section is unmapped."), &overlaylist
);
3906 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3907 _("List mappings of overlay sections."), &overlaylist
);
3909 add_cmd ("manual", class_support
, overlay_manual_command
,
3910 _("Enable overlay debugging."), &overlaylist
);
3911 add_cmd ("off", class_support
, overlay_off_command
,
3912 _("Disable overlay debugging."), &overlaylist
);
3913 add_cmd ("auto", class_support
, overlay_auto_command
,
3914 _("Enable automatic overlay debugging."), &overlaylist
);
3915 add_cmd ("load-target", class_support
, overlay_load_command
,
3916 _("Read the overlay mapping state from the target."), &overlaylist
);
3918 /* Filename extension to source language lookup table: */
3919 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3921 Set mapping between filename extension and source language."), _("\
3922 Show mapping between filename extension and source language."), _("\
3923 Usage: set extension-language .foo bar"),
3924 set_ext_lang_command
,
3926 &setlist
, &showlist
);
3928 add_info ("extensions", info_ext_lang_command
,
3929 _("All filename extensions associated with a source language."));
3931 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3932 &debug_file_directory
, _("\
3933 Set the directories where separate debug symbols are searched for."), _("\
3934 Show the directories where separate debug symbols are searched for."), _("\
3935 Separate debug symbols are first searched for in the same\n\
3936 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3937 and lastly at the path of the directory of the binary with\n\
3938 each global debug-file-directory component prepended."),
3940 show_debug_file_directory
,
3941 &setlist
, &showlist
);
3943 add_setshow_enum_cmd ("symbol-loading", no_class
,
3944 print_symbol_loading_enums
, &print_symbol_loading
,
3946 Set printing of symbol loading messages."), _("\
3947 Show printing of symbol loading messages."), _("\
3948 off == turn all messages off\n\
3949 brief == print messages for the executable,\n\
3950 and brief messages for shared libraries\n\
3951 full == print messages for the executable,\n\
3952 and messages for each shared library."),
3955 &setprintlist
, &showprintlist
);
3957 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3958 &separate_debug_file_debug
, _("\
3959 Set printing of separate debug info file search debug."), _("\
3960 Show printing of separate debug info file search debug."), _("\
3961 When on, GDB prints the searched locations while looking for separate debug \
3962 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3965 selftests::register_test
3966 ("filename_language", selftests::filename_language::test_filename_language
);
3967 selftests::register_test
3968 ("set_ext_lang_command",
3969 selftests::filename_language::test_set_ext_lang_command
);