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
);
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 ();
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 /* Note that we only print a message if we have no symbols and have
1132 no separate debug file. If there is a separate debug file which
1133 does not have symbols, we'll have emitted this message for that
1134 file, and so printing it twice is just redundant. */
1135 if (should_print
&& !objfile_has_symbols (objfile
)
1136 && objfile
->separate_debug_objfile
== nullptr)
1137 printf_filtered (_("(No debugging symbols found in %s)\n"), name
);
1141 if (deprecated_post_add_symbol_hook
)
1142 deprecated_post_add_symbol_hook ();
1145 /* We print some messages regardless of whether 'from_tty ||
1146 info_verbose' is true, so make sure they go out at the right
1148 gdb_flush (gdb_stdout
);
1150 if (objfile
->sf
== NULL
)
1152 gdb::observers::new_objfile
.notify (objfile
);
1153 return objfile
; /* No symbols. */
1156 finish_new_objfile (objfile
, add_flags
);
1158 gdb::observers::new_objfile
.notify (objfile
);
1160 bfd_cache_close_all ();
1164 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1165 see the objfile constructor. */
1168 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1169 symfile_add_flags symfile_flags
,
1170 struct objfile
*objfile
)
1172 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1173 because sections of BFD may not match sections of OBJFILE and because
1174 vma may have been modified by tools such as prelink. */
1175 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1177 symbol_file_add_with_addrs
1178 (bfd
, name
, symfile_flags
, &sap
,
1179 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1184 /* Process the symbol file ABFD, as either the main file or as a
1185 dynamically loaded file.
1186 See symbol_file_add_with_addrs's comments for details. */
1189 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1190 symfile_add_flags add_flags
,
1191 section_addr_info
*addrs
,
1192 objfile_flags flags
, struct objfile
*parent
)
1194 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1198 /* Process a symbol file, as either the main file or as a dynamically
1199 loaded file. See symbol_file_add_with_addrs's comments for details. */
1202 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1203 section_addr_info
*addrs
, objfile_flags flags
)
1205 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1207 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1211 /* Call symbol_file_add() with default values and update whatever is
1212 affected by the loading of a new main().
1213 Used when the file is supplied in the gdb command line
1214 and by some targets with special loading requirements.
1215 The auxiliary function, symbol_file_add_main_1(), has the flags
1216 argument for the switches that can only be specified in the symbol_file
1220 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1222 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1226 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1227 objfile_flags flags
, CORE_ADDR reloff
)
1229 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1231 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1233 objfile_rebase (objfile
, reloff
);
1235 /* Getting new symbols may change our opinion about
1236 what is frameless. */
1237 reinit_frame_cache ();
1239 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1240 set_initial_language ();
1244 symbol_file_clear (int from_tty
)
1246 if ((have_full_symbols () || have_partial_symbols ())
1249 ? !query (_("Discard symbol table from `%s'? "),
1250 objfile_name (symfile_objfile
))
1251 : !query (_("Discard symbol table? "))))
1252 error (_("Not confirmed."));
1254 /* solib descriptors may have handles to objfiles. Wipe them before their
1255 objfiles get stale by free_all_objfiles. */
1256 no_shared_libraries (NULL
, from_tty
);
1258 free_all_objfiles ();
1260 gdb_assert (symfile_objfile
== NULL
);
1262 printf_filtered (_("No symbol file now.\n"));
1265 /* See symfile.h. */
1267 int separate_debug_file_debug
= 0;
1270 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1271 struct objfile
*parent_objfile
)
1273 unsigned long file_crc
;
1275 struct stat parent_stat
, abfd_stat
;
1276 int verified_as_different
;
1278 /* Find a separate debug info file as if symbols would be present in
1279 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1280 section can contain just the basename of PARENT_OBJFILE without any
1281 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1282 the separate debug infos with the same basename can exist. */
1284 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1287 if (separate_debug_file_debug
)
1289 printf_filtered (_(" Trying %s..."), name
.c_str ());
1290 gdb_flush (gdb_stdout
);
1293 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
, -1));
1297 if (separate_debug_file_debug
)
1298 printf_filtered (_(" no, unable to open.\n"));
1303 /* Verify symlinks were not the cause of filename_cmp name difference above.
1305 Some operating systems, e.g. Windows, do not provide a meaningful
1306 st_ino; they always set it to zero. (Windows does provide a
1307 meaningful st_dev.) Files accessed from gdbservers that do not
1308 support the vFile:fstat packet will also have st_ino set to zero.
1309 Do not indicate a duplicate library in either case. While there
1310 is no guarantee that a system that provides meaningful inode
1311 numbers will never set st_ino to zero, this is merely an
1312 optimization, so we do not need to worry about false negatives. */
1314 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1315 && abfd_stat
.st_ino
!= 0
1316 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1318 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1319 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1321 if (separate_debug_file_debug
)
1322 printf_filtered (_(" no, same file as the objfile.\n"));
1326 verified_as_different
= 1;
1329 verified_as_different
= 0;
1331 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1335 if (separate_debug_file_debug
)
1336 printf_filtered (_(" no, error computing CRC.\n"));
1341 if (crc
!= file_crc
)
1343 unsigned long parent_crc
;
1345 /* If the files could not be verified as different with
1346 bfd_stat then we need to calculate the parent's CRC
1347 to verify whether the files are different or not. */
1349 if (!verified_as_different
)
1351 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1353 if (separate_debug_file_debug
)
1354 printf_filtered (_(" no, error computing CRC.\n"));
1360 if (verified_as_different
|| parent_crc
!= file_crc
)
1361 warning (_("the debug information found in \"%s\""
1362 " does not match \"%s\" (CRC mismatch).\n"),
1363 name
.c_str (), objfile_name (parent_objfile
));
1365 if (separate_debug_file_debug
)
1366 printf_filtered (_(" no, CRC doesn't match.\n"));
1371 if (separate_debug_file_debug
)
1372 printf_filtered (_(" yes!\n"));
1377 char *debug_file_directory
= NULL
;
1379 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1380 struct cmd_list_element
*c
, const char *value
)
1382 fprintf_filtered (file
,
1383 _("The directory where separate debug "
1384 "symbols are searched for is \"%s\".\n"),
1388 #if ! defined (DEBUG_SUBDIRECTORY)
1389 #define DEBUG_SUBDIRECTORY ".debug"
1392 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1393 where the original file resides (may not be the same as
1394 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1395 looking for. CANON_DIR is the "realpath" form of DIR.
1396 DIR must contain a trailing '/'.
1397 Returns the path of the file with separate debug info, or an empty
1401 find_separate_debug_file (const char *dir
,
1402 const char *canon_dir
,
1403 const char *debuglink
,
1404 unsigned long crc32
, struct objfile
*objfile
)
1406 if (separate_debug_file_debug
)
1407 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1408 "%s\n"), objfile_name (objfile
));
1410 /* First try in the same directory as the original file. */
1411 std::string debugfile
= dir
;
1412 debugfile
+= debuglink
;
1414 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1417 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1419 debugfile
+= DEBUG_SUBDIRECTORY
;
1421 debugfile
+= debuglink
;
1423 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1426 /* Then try in the global debugfile directories.
1428 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1429 cause "/..." lookups. */
1431 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1432 = dirnames_to_char_ptr_vec (debug_file_directory
);
1434 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1436 debugfile
= debugdir
.get ();
1439 debugfile
+= debuglink
;
1441 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1444 /* If the file is in the sysroot, try using its base path in the
1445 global debugfile directory. */
1446 if (canon_dir
!= NULL
1447 && filename_ncmp (canon_dir
, gdb_sysroot
,
1448 strlen (gdb_sysroot
)) == 0
1449 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1451 debugfile
= debugdir
.get ();
1452 debugfile
+= (canon_dir
+ strlen (gdb_sysroot
));
1454 debugfile
+= debuglink
;
1456 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1461 return std::string ();
1464 /* Modify PATH to contain only "[/]directory/" part of PATH.
1465 If there were no directory separators in PATH, PATH will be empty
1466 string on return. */
1469 terminate_after_last_dir_separator (char *path
)
1473 /* Strip off the final filename part, leaving the directory name,
1474 followed by a slash. The directory can be relative or absolute. */
1475 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1476 if (IS_DIR_SEPARATOR (path
[i
]))
1479 /* If I is -1 then no directory is present there and DIR will be "". */
1483 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1484 Returns pathname, or an empty string. */
1487 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1489 unsigned long crc32
;
1491 gdb::unique_xmalloc_ptr
<char> debuglink
1492 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1494 if (debuglink
== NULL
)
1496 /* There's no separate debug info, hence there's no way we could
1497 load it => no warning. */
1498 return std::string ();
1501 std::string dir
= objfile_name (objfile
);
1502 terminate_after_last_dir_separator (&dir
[0]);
1503 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1505 std::string debugfile
1506 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1507 debuglink
.get (), crc32
, objfile
);
1509 if (debugfile
.empty ())
1511 /* For PR gdb/9538, try again with realpath (if different from the
1516 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1517 && S_ISLNK (st_buf
.st_mode
))
1519 gdb::unique_xmalloc_ptr
<char> symlink_dir
1520 (lrealpath (objfile_name (objfile
)));
1521 if (symlink_dir
!= NULL
)
1523 terminate_after_last_dir_separator (symlink_dir
.get ());
1524 if (dir
!= symlink_dir
.get ())
1526 /* Different directory, so try using it. */
1527 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1540 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1544 validate_readnow_readnever (objfile_flags flags
)
1546 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1547 error (_("-readnow and -readnever cannot be used simultaneously"));
1550 /* This is the symbol-file command. Read the file, analyze its
1551 symbols, and add a struct symtab to a symtab list. The syntax of
1552 the command is rather bizarre:
1554 1. The function buildargv implements various quoting conventions
1555 which are undocumented and have little or nothing in common with
1556 the way things are quoted (or not quoted) elsewhere in GDB.
1558 2. Options are used, which are not generally used in GDB (perhaps
1559 "set mapped on", "set readnow on" would be better)
1561 3. The order of options matters, which is contrary to GNU
1562 conventions (because it is confusing and inconvenient). */
1565 symbol_file_command (const char *args
, int from_tty
)
1571 symbol_file_clear (from_tty
);
1575 objfile_flags flags
= OBJF_USERLOADED
;
1576 symfile_add_flags add_flags
= 0;
1578 bool stop_processing_options
= false;
1579 CORE_ADDR offset
= 0;
1584 add_flags
|= SYMFILE_VERBOSE
;
1586 gdb_argv
built_argv (args
);
1587 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1589 if (stop_processing_options
|| *arg
!= '-')
1594 error (_("Unrecognized argument \"%s\""), arg
);
1596 else if (strcmp (arg
, "-readnow") == 0)
1597 flags
|= OBJF_READNOW
;
1598 else if (strcmp (arg
, "-readnever") == 0)
1599 flags
|= OBJF_READNEVER
;
1600 else if (strcmp (arg
, "-o") == 0)
1602 arg
= built_argv
[++idx
];
1604 error (_("Missing argument to -o"));
1606 offset
= parse_and_eval_address (arg
);
1608 else if (strcmp (arg
, "--") == 0)
1609 stop_processing_options
= true;
1611 error (_("Unrecognized argument \"%s\""), arg
);
1615 error (_("no symbol file name was specified"));
1617 validate_readnow_readnever (flags
);
1619 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1623 /* Set the initial language.
1625 FIXME: A better solution would be to record the language in the
1626 psymtab when reading partial symbols, and then use it (if known) to
1627 set the language. This would be a win for formats that encode the
1628 language in an easily discoverable place, such as DWARF. For
1629 stabs, we can jump through hoops looking for specially named
1630 symbols or try to intuit the language from the specific type of
1631 stabs we find, but we can't do that until later when we read in
1635 set_initial_language (void)
1637 enum language lang
= main_language ();
1639 if (lang
== language_unknown
)
1641 char *name
= main_name ();
1642 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1645 lang
= SYMBOL_LANGUAGE (sym
);
1648 if (lang
== language_unknown
)
1650 /* Make C the default language */
1654 set_language (lang
);
1655 expected_language
= current_language
; /* Don't warn the user. */
1658 /* Open the file specified by NAME and hand it off to BFD for
1659 preliminary analysis. Return a newly initialized bfd *, which
1660 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1661 absolute). In case of trouble, error() is called. */
1664 symfile_bfd_open (const char *name
)
1668 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1669 if (!is_target_filename (name
))
1671 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1673 /* Look down path for it, allocate 2nd new malloc'd copy. */
1674 desc
= openp (getenv ("PATH"),
1675 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1676 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1677 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1680 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1682 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1683 desc
= openp (getenv ("PATH"),
1684 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1685 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1689 perror_with_name (expanded_name
.get ());
1691 name
= absolute_name
.get ();
1694 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1695 if (sym_bfd
== NULL
)
1696 error (_("`%s': can't open to read symbols: %s."), name
,
1697 bfd_errmsg (bfd_get_error ()));
1699 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1700 bfd_set_cacheable (sym_bfd
.get (), 1);
1702 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1703 error (_("`%s': can't read symbols: %s."), name
,
1704 bfd_errmsg (bfd_get_error ()));
1709 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1710 the section was not found. */
1713 get_section_index (struct objfile
*objfile
, const char *section_name
)
1715 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1723 /* Link SF into the global symtab_fns list.
1724 FLAVOUR is the file format that SF handles.
1725 Called on startup by the _initialize routine in each object file format
1726 reader, to register information about each format the reader is prepared
1730 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1732 symtab_fns
.emplace_back (flavour
, sf
);
1735 /* Initialize OBJFILE to read symbols from its associated BFD. It
1736 either returns or calls error(). The result is an initialized
1737 struct sym_fns in the objfile structure, that contains cached
1738 information about the symbol file. */
1740 static const struct sym_fns
*
1741 find_sym_fns (bfd
*abfd
)
1743 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1745 if (our_flavour
== bfd_target_srec_flavour
1746 || our_flavour
== bfd_target_ihex_flavour
1747 || our_flavour
== bfd_target_tekhex_flavour
)
1748 return NULL
; /* No symbols. */
1750 for (const registered_sym_fns
&rsf
: symtab_fns
)
1751 if (our_flavour
== rsf
.sym_flavour
)
1754 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1755 bfd_get_target (abfd
));
1759 /* This function runs the load command of our current target. */
1762 load_command (const char *arg
, int from_tty
)
1766 /* The user might be reloading because the binary has changed. Take
1767 this opportunity to check. */
1768 reopen_exec_file ();
1774 const char *parg
, *prev
;
1776 arg
= get_exec_file (1);
1778 /* We may need to quote this string so buildargv can pull it
1781 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1783 temp
.append (prev
, parg
- prev
);
1785 temp
.push_back ('\\');
1787 /* If we have not copied anything yet, then we didn't see a
1788 character to quote, and we can just leave ARG unchanged. */
1792 arg
= temp
.c_str ();
1796 target_load (arg
, from_tty
);
1798 /* After re-loading the executable, we don't really know which
1799 overlays are mapped any more. */
1800 overlay_cache_invalid
= 1;
1803 /* This version of "load" should be usable for any target. Currently
1804 it is just used for remote targets, not inftarg.c or core files,
1805 on the theory that only in that case is it useful.
1807 Avoiding xmodem and the like seems like a win (a) because we don't have
1808 to worry about finding it, and (b) On VMS, fork() is very slow and so
1809 we don't want to run a subprocess. On the other hand, I'm not sure how
1810 performance compares. */
1812 static int validate_download
= 0;
1814 /* Callback service function for generic_load (bfd_map_over_sections). */
1817 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1819 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1821 *sum
+= bfd_get_section_size (asec
);
1824 /* Opaque data for load_progress. */
1825 struct load_progress_data
1827 /* Cumulative data. */
1828 unsigned long write_count
= 0;
1829 unsigned long data_count
= 0;
1830 bfd_size_type total_size
= 0;
1833 /* Opaque data for load_progress for a single section. */
1834 struct load_progress_section_data
1836 load_progress_section_data (load_progress_data
*cumulative_
,
1837 const char *section_name_
, ULONGEST section_size_
,
1838 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1839 : cumulative (cumulative_
), section_name (section_name_
),
1840 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1843 struct load_progress_data
*cumulative
;
1845 /* Per-section data. */
1846 const char *section_name
;
1847 ULONGEST section_sent
= 0;
1848 ULONGEST section_size
;
1853 /* Opaque data for load_section_callback. */
1854 struct load_section_data
1856 load_section_data (load_progress_data
*progress_data_
)
1857 : progress_data (progress_data_
)
1860 ~load_section_data ()
1862 for (auto &&request
: requests
)
1864 xfree (request
.data
);
1865 delete ((load_progress_section_data
*) request
.baton
);
1869 CORE_ADDR load_offset
= 0;
1870 struct load_progress_data
*progress_data
;
1871 std::vector
<struct memory_write_request
> requests
;
1874 /* Target write callback routine for progress reporting. */
1877 load_progress (ULONGEST bytes
, void *untyped_arg
)
1879 struct load_progress_section_data
*args
1880 = (struct load_progress_section_data
*) untyped_arg
;
1881 struct load_progress_data
*totals
;
1884 /* Writing padding data. No easy way to get at the cumulative
1885 stats, so just ignore this. */
1888 totals
= args
->cumulative
;
1890 if (bytes
== 0 && args
->section_sent
== 0)
1892 /* The write is just starting. Let the user know we've started
1894 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1896 hex_string (args
->section_size
),
1897 paddress (target_gdbarch (), args
->lma
));
1901 if (validate_download
)
1903 /* Broken memories and broken monitors manifest themselves here
1904 when bring new computers to life. This doubles already slow
1906 /* NOTE: cagney/1999-10-18: A more efficient implementation
1907 might add a verify_memory() method to the target vector and
1908 then use that. remote.c could implement that method using
1909 the ``qCRC'' packet. */
1910 gdb::byte_vector
check (bytes
);
1912 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1913 error (_("Download verify read failed at %s"),
1914 paddress (target_gdbarch (), args
->lma
));
1915 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1916 error (_("Download verify compare failed at %s"),
1917 paddress (target_gdbarch (), args
->lma
));
1919 totals
->data_count
+= bytes
;
1921 args
->buffer
+= bytes
;
1922 totals
->write_count
+= 1;
1923 args
->section_sent
+= bytes
;
1924 if (check_quit_flag ()
1925 || (deprecated_ui_load_progress_hook
!= NULL
1926 && deprecated_ui_load_progress_hook (args
->section_name
,
1927 args
->section_sent
)))
1928 error (_("Canceled the download"));
1930 if (deprecated_show_load_progress
!= NULL
)
1931 deprecated_show_load_progress (args
->section_name
,
1935 totals
->total_size
);
1938 /* Callback service function for generic_load (bfd_map_over_sections). */
1941 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1943 struct load_section_data
*args
= (struct load_section_data
*) data
;
1944 bfd_size_type size
= bfd_get_section_size (asec
);
1945 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1947 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1953 ULONGEST begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1954 ULONGEST end
= begin
+ size
;
1955 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1956 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1958 load_progress_section_data
*section_data
1959 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
1962 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
1965 static void print_transfer_performance (struct ui_file
*stream
,
1966 unsigned long data_count
,
1967 unsigned long write_count
,
1968 std::chrono::steady_clock::duration d
);
1971 generic_load (const char *args
, int from_tty
)
1973 struct load_progress_data total_progress
;
1974 struct load_section_data
cbdata (&total_progress
);
1975 struct ui_out
*uiout
= current_uiout
;
1978 error_no_arg (_("file to load"));
1980 gdb_argv
argv (args
);
1982 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
1984 if (argv
[1] != NULL
)
1988 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
1990 /* If the last word was not a valid number then
1991 treat it as a file name with spaces in. */
1992 if (argv
[1] == endptr
)
1993 error (_("Invalid download offset:%s."), argv
[1]);
1995 if (argv
[2] != NULL
)
1996 error (_("Too many parameters."));
1999 /* Open the file for loading. */
2000 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2001 if (loadfile_bfd
== NULL
)
2002 perror_with_name (filename
.get ());
2004 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2006 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2007 bfd_errmsg (bfd_get_error ()));
2010 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2011 (void *) &total_progress
.total_size
);
2013 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2015 using namespace std::chrono
;
2017 steady_clock::time_point start_time
= steady_clock::now ();
2019 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2020 load_progress
) != 0)
2021 error (_("Load failed"));
2023 steady_clock::time_point end_time
= steady_clock::now ();
2025 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2026 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2027 uiout
->text ("Start address ");
2028 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2029 uiout
->text (", load size ");
2030 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2032 regcache_write_pc (get_current_regcache (), entry
);
2034 /* Reset breakpoints, now that we have changed the load image. For
2035 instance, breakpoints may have been set (or reset, by
2036 post_create_inferior) while connected to the target but before we
2037 loaded the program. In that case, the prologue analyzer could
2038 have read instructions from the target to find the right
2039 breakpoint locations. Loading has changed the contents of that
2042 breakpoint_re_set ();
2044 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2045 total_progress
.write_count
,
2046 end_time
- start_time
);
2049 /* Report on STREAM the performance of a memory transfer operation,
2050 such as 'load'. DATA_COUNT is the number of bytes transferred.
2051 WRITE_COUNT is the number of separate write operations, or 0, if
2052 that information is not available. TIME is how long the operation
2056 print_transfer_performance (struct ui_file
*stream
,
2057 unsigned long data_count
,
2058 unsigned long write_count
,
2059 std::chrono::steady_clock::duration time
)
2061 using namespace std::chrono
;
2062 struct ui_out
*uiout
= current_uiout
;
2064 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2066 uiout
->text ("Transfer rate: ");
2067 if (ms
.count () > 0)
2069 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2071 if (uiout
->is_mi_like_p ())
2073 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2074 uiout
->text (" bits/sec");
2076 else if (rate
< 1024)
2078 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2079 uiout
->text (" bytes/sec");
2083 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2084 uiout
->text (" KB/sec");
2089 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2090 uiout
->text (" bits in <1 sec");
2092 if (write_count
> 0)
2095 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2096 uiout
->text (" bytes/write");
2098 uiout
->text (".\n");
2101 /* Add an OFFSET to the start address of each section in OBJF, except
2102 sections that were specified in ADDRS. */
2105 set_objfile_default_section_offset (struct objfile
*objf
,
2106 const section_addr_info
&addrs
,
2109 /* Add OFFSET to all sections by default. */
2110 std::vector
<struct section_offsets
> offsets (objf
->num_sections
,
2113 /* Create sorted lists of all sections in ADDRS as well as all
2114 sections in OBJF. */
2116 std::vector
<const struct other_sections
*> addrs_sorted
2117 = addrs_section_sort (addrs
);
2119 section_addr_info objf_addrs
2120 = build_section_addr_info_from_objfile (objf
);
2121 std::vector
<const struct other_sections
*> objf_addrs_sorted
2122 = addrs_section_sort (objf_addrs
);
2124 /* Walk the BFD section list, and if a matching section is found in
2125 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2128 Note that both lists may contain multiple sections with the same
2129 name, and then the sections from ADDRS are matched in BFD order
2130 (thanks to sectindex). */
2132 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2133 = addrs_sorted
.begin ();
2134 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2136 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2139 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2141 const struct other_sections
*sect
= *addrs_sorted_iter
;
2142 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2143 cmp
= strcmp (sect_name
, objf_name
);
2145 ++addrs_sorted_iter
;
2149 offsets
[objf_sect
->sectindex
].offsets
[0] = 0;
2152 /* Apply the new section offsets. */
2153 objfile_relocate (objf
, offsets
.data ());
2156 /* This function allows the addition of incrementally linked object files.
2157 It does not modify any state in the target, only in the debugger. */
2158 /* Note: ezannoni 2000-04-13 This function/command used to have a
2159 special case syntax for the rombug target (Rombug is the boot
2160 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2161 rombug case, the user doesn't need to supply a text address,
2162 instead a call to target_link() (in target.c) would supply the
2163 value to use. We are now discontinuing this type of ad hoc syntax. */
2166 add_symbol_file_command (const char *args
, int from_tty
)
2168 struct gdbarch
*gdbarch
= get_current_arch ();
2169 gdb::unique_xmalloc_ptr
<char> filename
;
2172 struct objfile
*objf
;
2173 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2174 symfile_add_flags add_flags
= 0;
2177 add_flags
|= SYMFILE_VERBOSE
;
2185 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2186 bool stop_processing_options
= false;
2187 CORE_ADDR offset
= 0;
2192 error (_("add-symbol-file takes a file name and an address"));
2194 bool seen_addr
= false;
2195 bool seen_offset
= false;
2196 gdb_argv
argv (args
);
2198 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2200 if (stop_processing_options
|| *arg
!= '-')
2202 if (filename
== NULL
)
2204 /* First non-option argument is always the filename. */
2205 filename
.reset (tilde_expand (arg
));
2207 else if (!seen_addr
)
2209 /* The second non-option argument is always the text
2210 address at which to load the program. */
2211 sect_opts
[0].value
= arg
;
2215 error (_("Unrecognized argument \"%s\""), arg
);
2217 else if (strcmp (arg
, "-readnow") == 0)
2218 flags
|= OBJF_READNOW
;
2219 else if (strcmp (arg
, "-readnever") == 0)
2220 flags
|= OBJF_READNEVER
;
2221 else if (strcmp (arg
, "-s") == 0)
2223 if (argv
[argcnt
+ 1] == NULL
)
2224 error (_("Missing section name after \"-s\""));
2225 else if (argv
[argcnt
+ 2] == NULL
)
2226 error (_("Missing section address after \"-s\""));
2228 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2230 sect_opts
.push_back (sect
);
2233 else if (strcmp (arg
, "-o") == 0)
2235 arg
= argv
[++argcnt
];
2237 error (_("Missing argument to -o"));
2239 offset
= parse_and_eval_address (arg
);
2242 else if (strcmp (arg
, "--") == 0)
2243 stop_processing_options
= true;
2245 error (_("Unrecognized argument \"%s\""), arg
);
2248 if (filename
== NULL
)
2249 error (_("You must provide a filename to be loaded."));
2251 validate_readnow_readnever (flags
);
2253 /* Print the prompt for the query below. And save the arguments into
2254 a sect_addr_info structure to be passed around to other
2255 functions. We have to split this up into separate print
2256 statements because hex_string returns a local static
2259 printf_unfiltered (_("add symbol table from file \"%s\""),
2261 section_addr_info section_addrs
;
2262 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2265 for (; it
!= sect_opts
.end (); ++it
)
2268 const char *val
= it
->value
;
2269 const char *sec
= it
->name
;
2271 if (section_addrs
.empty ())
2272 printf_unfiltered (_(" at\n"));
2273 addr
= parse_and_eval_address (val
);
2275 /* Here we store the section offsets in the order they were
2276 entered on the command line. Every array element is
2277 assigned an ascending section index to preserve the above
2278 order over an unstable sorting algorithm. This dummy
2279 index is not used for any other purpose.
2281 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2282 printf_filtered ("\t%s_addr = %s\n", sec
,
2283 paddress (gdbarch
, addr
));
2285 /* The object's sections are initialized when a
2286 call is made to build_objfile_section_table (objfile).
2287 This happens in reread_symbols.
2288 At this point, we don't know what file type this is,
2289 so we can't determine what section names are valid. */
2292 printf_unfiltered (_("%s offset by %s\n"),
2293 (section_addrs
.empty ()
2294 ? _(" with all sections")
2295 : _("with other sections")),
2296 paddress (gdbarch
, offset
));
2297 else if (section_addrs
.empty ())
2298 printf_unfiltered ("\n");
2300 if (from_tty
&& (!query ("%s", "")))
2301 error (_("Not confirmed."));
2303 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2307 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2309 add_target_sections_of_objfile (objf
);
2311 /* Getting new symbols may change our opinion about what is
2313 reinit_frame_cache ();
2317 /* This function removes a symbol file that was added via add-symbol-file. */
2320 remove_symbol_file_command (const char *args
, int from_tty
)
2322 struct objfile
*objf
= NULL
;
2323 struct program_space
*pspace
= current_program_space
;
2328 error (_("remove-symbol-file: no symbol file provided"));
2330 gdb_argv
argv (args
);
2332 if (strcmp (argv
[0], "-a") == 0)
2334 /* Interpret the next argument as an address. */
2337 if (argv
[1] == NULL
)
2338 error (_("Missing address argument"));
2340 if (argv
[2] != NULL
)
2341 error (_("Junk after %s"), argv
[1]);
2343 addr
= parse_and_eval_address (argv
[1]);
2347 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2348 && (objf
->flags
& OBJF_SHARED
) != 0
2349 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2353 else if (argv
[0] != NULL
)
2355 /* Interpret the current argument as a file name. */
2357 if (argv
[1] != NULL
)
2358 error (_("Junk after %s"), argv
[0]);
2360 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2364 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2365 && (objf
->flags
& OBJF_SHARED
) != 0
2366 && objf
->pspace
== pspace
2367 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2373 error (_("No symbol file found"));
2376 && !query (_("Remove symbol table from file \"%s\"? "),
2377 objfile_name (objf
)))
2378 error (_("Not confirmed."));
2381 clear_symtab_users (0);
2384 /* Re-read symbols if a symbol-file has changed. */
2387 reread_symbols (void)
2389 struct objfile
*objfile
;
2391 struct stat new_statbuf
;
2393 std::vector
<struct objfile
*> new_objfiles
;
2395 /* With the addition of shared libraries, this should be modified,
2396 the load time should be saved in the partial symbol tables, since
2397 different tables may come from different source files. FIXME.
2398 This routine should then walk down each partial symbol table
2399 and see if the symbol table that it originates from has been changed. */
2401 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2403 if (objfile
->obfd
== NULL
)
2406 /* Separate debug objfiles are handled in the main objfile. */
2407 if (objfile
->separate_debug_objfile_backlink
)
2410 /* If this object is from an archive (what you usually create with
2411 `ar', often called a `static library' on most systems, though
2412 a `shared library' on AIX is also an archive), then you should
2413 stat on the archive name, not member name. */
2414 if (objfile
->obfd
->my_archive
)
2415 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2417 res
= stat (objfile_name (objfile
), &new_statbuf
);
2420 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2421 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2422 objfile_name (objfile
));
2425 new_modtime
= new_statbuf
.st_mtime
;
2426 if (new_modtime
!= objfile
->mtime
)
2428 struct cleanup
*old_cleanups
;
2429 struct section_offsets
*offsets
;
2432 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2433 objfile_name (objfile
));
2435 /* There are various functions like symbol_file_add,
2436 symfile_bfd_open, syms_from_objfile, etc., which might
2437 appear to do what we want. But they have various other
2438 effects which we *don't* want. So we just do stuff
2439 ourselves. We don't worry about mapped files (for one thing,
2440 any mapped file will be out of date). */
2442 /* If we get an error, blow away this objfile (not sure if
2443 that is the correct response for things like shared
2445 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
2447 /* We need to do this whenever any symbols go away. */
2448 old_cleanups
= make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2450 if (exec_bfd
!= NULL
2451 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2452 bfd_get_filename (exec_bfd
)) == 0)
2454 /* Reload EXEC_BFD without asking anything. */
2456 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2459 /* Keep the calls order approx. the same as in free_objfile. */
2461 /* Free the separate debug objfiles. It will be
2462 automatically recreated by sym_read. */
2463 free_objfile_separate_debug (objfile
);
2465 /* Remove any references to this objfile in the global
2467 preserve_values (objfile
);
2469 /* Nuke all the state that we will re-read. Much of the following
2470 code which sets things to NULL really is necessary to tell
2471 other parts of GDB that there is nothing currently there.
2473 Try to keep the freeing order compatible with free_objfile. */
2475 if (objfile
->sf
!= NULL
)
2477 (*objfile
->sf
->sym_finish
) (objfile
);
2480 clear_objfile_data (objfile
);
2482 /* Clean up any state BFD has sitting around. */
2484 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2485 char *obfd_filename
;
2487 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2488 /* Open the new BFD before freeing the old one, so that
2489 the filename remains live. */
2490 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2491 objfile
->obfd
= temp
.release ();
2492 if (objfile
->obfd
== NULL
)
2493 error (_("Can't open %s to read symbols."), obfd_filename
);
2496 std::string original_name
= objfile
->original_name
;
2498 /* bfd_openr sets cacheable to true, which is what we want. */
2499 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2500 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2501 bfd_errmsg (bfd_get_error ()));
2503 /* Save the offsets, we will nuke them with the rest of the
2505 num_offsets
= objfile
->num_sections
;
2506 offsets
= ((struct section_offsets
*)
2507 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2508 memcpy (offsets
, objfile
->section_offsets
,
2509 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2511 /* FIXME: Do we have to free a whole linked list, or is this
2513 objfile
->global_psymbols
.clear ();
2514 objfile
->static_psymbols
.clear ();
2516 /* Free the obstacks for non-reusable objfiles. */
2517 psymbol_bcache_free (objfile
->psymbol_cache
);
2518 objfile
->psymbol_cache
= psymbol_bcache_init ();
2520 /* NB: after this call to obstack_free, objfiles_changed
2521 will need to be called (see discussion below). */
2522 obstack_free (&objfile
->objfile_obstack
, 0);
2523 objfile
->sections
= NULL
;
2524 objfile
->compunit_symtabs
= NULL
;
2525 objfile
->psymtabs
= NULL
;
2526 objfile
->psymtabs_addrmap
= NULL
;
2527 objfile
->free_psymtabs
= NULL
;
2528 objfile
->template_symbols
= NULL
;
2529 objfile
->static_links
= NULL
;
2531 /* obstack_init also initializes the obstack so it is
2532 empty. We could use obstack_specify_allocation but
2533 gdb_obstack.h specifies the alloc/dealloc functions. */
2534 obstack_init (&objfile
->objfile_obstack
);
2536 /* set_objfile_per_bfd potentially allocates the per-bfd
2537 data on the objfile's obstack (if sharing data across
2538 multiple users is not possible), so it's important to
2539 do it *after* the obstack has been initialized. */
2540 set_objfile_per_bfd (objfile
);
2542 objfile
->original_name
2543 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
2544 original_name
.c_str (),
2545 original_name
.size ());
2547 /* Reset the sym_fns pointer. The ELF reader can change it
2548 based on whether .gdb_index is present, and we need it to
2549 start over. PR symtab/15885 */
2550 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2552 build_objfile_section_table (objfile
);
2553 terminate_minimal_symbol_table (objfile
);
2555 /* We use the same section offsets as from last time. I'm not
2556 sure whether that is always correct for shared libraries. */
2557 objfile
->section_offsets
= (struct section_offsets
*)
2558 obstack_alloc (&objfile
->objfile_obstack
,
2559 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2560 memcpy (objfile
->section_offsets
, offsets
,
2561 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2562 objfile
->num_sections
= num_offsets
;
2564 /* What the hell is sym_new_init for, anyway? The concept of
2565 distinguishing between the main file and additional files
2566 in this way seems rather dubious. */
2567 if (objfile
== symfile_objfile
)
2569 (*objfile
->sf
->sym_new_init
) (objfile
);
2572 (*objfile
->sf
->sym_init
) (objfile
);
2573 clear_complaints ();
2575 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2577 /* We are about to read new symbols and potentially also
2578 DWARF information. Some targets may want to pass addresses
2579 read from DWARF DIE's through an adjustment function before
2580 saving them, like MIPS, which may call into
2581 "find_pc_section". When called, that function will make
2582 use of per-objfile program space data.
2584 Since we discarded our section information above, we have
2585 dangling pointers in the per-objfile program space data
2586 structure. Force GDB to update the section mapping
2587 information by letting it know the objfile has changed,
2588 making the dangling pointers point to correct data
2591 objfiles_changed ();
2593 read_symbols (objfile
, 0);
2595 if (!objfile_has_symbols (objfile
))
2598 printf_filtered (_("(no debugging symbols found)\n"));
2602 /* We're done reading the symbol file; finish off complaints. */
2603 clear_complaints ();
2605 /* Getting new symbols may change our opinion about what is
2608 reinit_frame_cache ();
2610 /* Discard cleanups as symbol reading was successful. */
2611 objfile_holder
.release ();
2612 discard_cleanups (old_cleanups
);
2614 /* If the mtime has changed between the time we set new_modtime
2615 and now, we *want* this to be out of date, so don't call stat
2617 objfile
->mtime
= new_modtime
;
2618 init_entry_point_info (objfile
);
2620 new_objfiles
.push_back (objfile
);
2624 if (!new_objfiles
.empty ())
2626 clear_symtab_users (0);
2628 /* clear_objfile_data for each objfile was called before freeing it and
2629 gdb::observers::new_objfile.notify (NULL) has been called by
2630 clear_symtab_users above. Notify the new files now. */
2631 for (auto iter
: new_objfiles
)
2632 gdb::observers::new_objfile
.notify (iter
);
2634 /* At least one objfile has changed, so we can consider that
2635 the executable we're debugging has changed too. */
2636 gdb::observers::executable_changed
.notify ();
2641 struct filename_language
2643 filename_language (const std::string
&ext_
, enum language lang_
)
2644 : ext (ext_
), lang (lang_
)
2651 static std::vector
<filename_language
> filename_language_table
;
2653 /* See symfile.h. */
2656 add_filename_language (const char *ext
, enum language lang
)
2658 filename_language_table
.emplace_back (ext
, lang
);
2661 static char *ext_args
;
2663 show_ext_args (struct ui_file
*file
, int from_tty
,
2664 struct cmd_list_element
*c
, const char *value
)
2666 fprintf_filtered (file
,
2667 _("Mapping between filename extension "
2668 "and source language is \"%s\".\n"),
2673 set_ext_lang_command (const char *args
,
2674 int from_tty
, struct cmd_list_element
*e
)
2676 char *cp
= ext_args
;
2679 /* First arg is filename extension, starting with '.' */
2681 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2683 /* Find end of first arg. */
2684 while (*cp
&& !isspace (*cp
))
2688 error (_("'%s': two arguments required -- "
2689 "filename extension and language"),
2692 /* Null-terminate first arg. */
2695 /* Find beginning of second arg, which should be a source language. */
2696 cp
= skip_spaces (cp
);
2699 error (_("'%s': two arguments required -- "
2700 "filename extension and language"),
2703 /* Lookup the language from among those we know. */
2704 lang
= language_enum (cp
);
2706 auto it
= filename_language_table
.begin ();
2707 /* Now lookup the filename extension: do we already know it? */
2708 for (; it
!= filename_language_table
.end (); it
++)
2710 if (it
->ext
== ext_args
)
2714 if (it
== filename_language_table
.end ())
2716 /* New file extension. */
2717 add_filename_language (ext_args
, lang
);
2721 /* Redefining a previously known filename extension. */
2724 /* query ("Really make files of type %s '%s'?", */
2725 /* ext_args, language_str (lang)); */
2732 info_ext_lang_command (const char *args
, int from_tty
)
2734 printf_filtered (_("Filename extensions and the languages they represent:"));
2735 printf_filtered ("\n\n");
2736 for (const filename_language
&entry
: filename_language_table
)
2737 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2738 language_str (entry
.lang
));
2742 deduce_language_from_filename (const char *filename
)
2746 if (filename
!= NULL
)
2747 if ((cp
= strrchr (filename
, '.')) != NULL
)
2749 for (const filename_language
&entry
: filename_language_table
)
2750 if (entry
.ext
== cp
)
2754 return language_unknown
;
2757 /* Allocate and initialize a new symbol table.
2758 CUST is from the result of allocate_compunit_symtab. */
2761 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2763 struct objfile
*objfile
= cust
->objfile
;
2764 struct symtab
*symtab
2765 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2768 = (const char *) bcache (filename
, strlen (filename
) + 1,
2769 objfile
->per_bfd
->filename_cache
);
2770 symtab
->fullname
= NULL
;
2771 symtab
->language
= deduce_language_from_filename (filename
);
2773 /* This can be very verbose with lots of headers.
2774 Only print at higher debug levels. */
2775 if (symtab_create_debug
>= 2)
2777 /* Be a bit clever with debugging messages, and don't print objfile
2778 every time, only when it changes. */
2779 static char *last_objfile_name
= NULL
;
2781 if (last_objfile_name
== NULL
2782 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2784 xfree (last_objfile_name
);
2785 last_objfile_name
= xstrdup (objfile_name (objfile
));
2786 fprintf_filtered (gdb_stdlog
,
2787 "Creating one or more symtabs for objfile %s ...\n",
2790 fprintf_filtered (gdb_stdlog
,
2791 "Created symtab %s for module %s.\n",
2792 host_address_to_string (symtab
), filename
);
2795 /* Add it to CUST's list of symtabs. */
2796 if (cust
->filetabs
== NULL
)
2798 cust
->filetabs
= symtab
;
2799 cust
->last_filetab
= symtab
;
2803 cust
->last_filetab
->next
= symtab
;
2804 cust
->last_filetab
= symtab
;
2807 /* Backlink to the containing compunit symtab. */
2808 symtab
->compunit_symtab
= cust
;
2813 /* Allocate and initialize a new compunit.
2814 NAME is the name of the main source file, if there is one, or some
2815 descriptive text if there are no source files. */
2817 struct compunit_symtab
*
2818 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2820 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2821 struct compunit_symtab
);
2822 const char *saved_name
;
2824 cu
->objfile
= objfile
;
2826 /* The name we record here is only for display/debugging purposes.
2827 Just save the basename to avoid path issues (too long for display,
2828 relative vs absolute, etc.). */
2829 saved_name
= lbasename (name
);
2831 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2832 strlen (saved_name
));
2834 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2836 if (symtab_create_debug
)
2838 fprintf_filtered (gdb_stdlog
,
2839 "Created compunit symtab %s for %s.\n",
2840 host_address_to_string (cu
),
2847 /* Hook CU to the objfile it comes from. */
2850 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2852 cu
->next
= cu
->objfile
->compunit_symtabs
;
2853 cu
->objfile
->compunit_symtabs
= cu
;
2857 /* Reset all data structures in gdb which may contain references to
2858 symbol table data. */
2861 clear_symtab_users (symfile_add_flags add_flags
)
2863 /* Someday, we should do better than this, by only blowing away
2864 the things that really need to be blown. */
2866 /* Clear the "current" symtab first, because it is no longer valid.
2867 breakpoint_re_set may try to access the current symtab. */
2868 clear_current_source_symtab_and_line ();
2871 clear_last_displayed_sal ();
2872 clear_pc_function_cache ();
2873 gdb::observers::new_objfile
.notify (NULL
);
2875 /* Clear globals which might have pointed into a removed objfile.
2876 FIXME: It's not clear which of these are supposed to persist
2877 between expressions and which ought to be reset each time. */
2878 expression_context_block
= NULL
;
2879 innermost_block
.reset ();
2881 /* Varobj may refer to old symbols, perform a cleanup. */
2882 varobj_invalidate ();
2884 /* Now that the various caches have been cleared, we can re_set
2885 our breakpoints without risking it using stale data. */
2886 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2887 breakpoint_re_set ();
2891 clear_symtab_users_cleanup (void *ignore
)
2893 clear_symtab_users (0);
2897 The following code implements an abstraction for debugging overlay sections.
2899 The target model is as follows:
2900 1) The gnu linker will permit multiple sections to be mapped into the
2901 same VMA, each with its own unique LMA (or load address).
2902 2) It is assumed that some runtime mechanism exists for mapping the
2903 sections, one by one, from the load address into the VMA address.
2904 3) This code provides a mechanism for gdb to keep track of which
2905 sections should be considered to be mapped from the VMA to the LMA.
2906 This information is used for symbol lookup, and memory read/write.
2907 For instance, if a section has been mapped then its contents
2908 should be read from the VMA, otherwise from the LMA.
2910 Two levels of debugger support for overlays are available. One is
2911 "manual", in which the debugger relies on the user to tell it which
2912 overlays are currently mapped. This level of support is
2913 implemented entirely in the core debugger, and the information about
2914 whether a section is mapped is kept in the objfile->obj_section table.
2916 The second level of support is "automatic", and is only available if
2917 the target-specific code provides functionality to read the target's
2918 overlay mapping table, and translate its contents for the debugger
2919 (by updating the mapped state information in the obj_section tables).
2921 The interface is as follows:
2923 overlay map <name> -- tell gdb to consider this section mapped
2924 overlay unmap <name> -- tell gdb to consider this section unmapped
2925 overlay list -- list the sections that GDB thinks are mapped
2926 overlay read-target -- get the target's state of what's mapped
2927 overlay off/manual/auto -- set overlay debugging state
2928 Functional interface:
2929 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2930 section, return that section.
2931 find_pc_overlay(pc): find any overlay section that contains
2932 the pc, either in its VMA or its LMA
2933 section_is_mapped(sect): true if overlay is marked as mapped
2934 section_is_overlay(sect): true if section's VMA != LMA
2935 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2936 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2937 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2938 overlay_mapped_address(...): map an address from section's LMA to VMA
2939 overlay_unmapped_address(...): map an address from section's VMA to LMA
2940 symbol_overlayed_address(...): Return a "current" address for symbol:
2941 either in VMA or LMA depending on whether
2942 the symbol's section is currently mapped. */
2944 /* Overlay debugging state: */
2946 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2947 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2949 /* Function: section_is_overlay (SECTION)
2950 Returns true if SECTION has VMA not equal to LMA, ie.
2951 SECTION is loaded at an address different from where it will "run". */
2954 section_is_overlay (struct obj_section
*section
)
2956 if (overlay_debugging
&& section
)
2958 asection
*bfd_section
= section
->the_bfd_section
;
2960 if (bfd_section_lma (abfd
, bfd_section
) != 0
2961 && bfd_section_lma (abfd
, bfd_section
)
2962 != bfd_section_vma (abfd
, bfd_section
))
2969 /* Function: overlay_invalidate_all (void)
2970 Invalidate the mapped state of all overlay sections (mark it as stale). */
2973 overlay_invalidate_all (void)
2975 struct objfile
*objfile
;
2976 struct obj_section
*sect
;
2978 ALL_OBJSECTIONS (objfile
, sect
)
2979 if (section_is_overlay (sect
))
2980 sect
->ovly_mapped
= -1;
2983 /* Function: section_is_mapped (SECTION)
2984 Returns true if section is an overlay, and is currently mapped.
2986 Access to the ovly_mapped flag is restricted to this function, so
2987 that we can do automatic update. If the global flag
2988 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2989 overlay_invalidate_all. If the mapped state of the particular
2990 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2993 section_is_mapped (struct obj_section
*osect
)
2995 struct gdbarch
*gdbarch
;
2997 if (osect
== 0 || !section_is_overlay (osect
))
3000 switch (overlay_debugging
)
3004 return 0; /* overlay debugging off */
3005 case ovly_auto
: /* overlay debugging automatic */
3006 /* Unles there is a gdbarch_overlay_update function,
3007 there's really nothing useful to do here (can't really go auto). */
3008 gdbarch
= get_objfile_arch (osect
->objfile
);
3009 if (gdbarch_overlay_update_p (gdbarch
))
3011 if (overlay_cache_invalid
)
3013 overlay_invalidate_all ();
3014 overlay_cache_invalid
= 0;
3016 if (osect
->ovly_mapped
== -1)
3017 gdbarch_overlay_update (gdbarch
, osect
);
3020 case ovly_on
: /* overlay debugging manual */
3021 return osect
->ovly_mapped
== 1;
3025 /* Function: pc_in_unmapped_range
3026 If PC falls into the lma range of SECTION, return true, else false. */
3029 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3031 if (section_is_overlay (section
))
3033 bfd
*abfd
= section
->objfile
->obfd
;
3034 asection
*bfd_section
= section
->the_bfd_section
;
3036 /* We assume the LMA is relocated by the same offset as the VMA. */
3037 bfd_vma size
= bfd_get_section_size (bfd_section
);
3038 CORE_ADDR offset
= obj_section_offset (section
);
3040 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3041 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3048 /* Function: pc_in_mapped_range
3049 If PC falls into the vma range of SECTION, return true, else false. */
3052 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3054 if (section_is_overlay (section
))
3056 if (obj_section_addr (section
) <= pc
3057 && pc
< obj_section_endaddr (section
))
3064 /* Return true if the mapped ranges of sections A and B overlap, false
3068 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3070 CORE_ADDR a_start
= obj_section_addr (a
);
3071 CORE_ADDR a_end
= obj_section_endaddr (a
);
3072 CORE_ADDR b_start
= obj_section_addr (b
);
3073 CORE_ADDR b_end
= obj_section_endaddr (b
);
3075 return (a_start
< b_end
&& b_start
< a_end
);
3078 /* Function: overlay_unmapped_address (PC, SECTION)
3079 Returns the address corresponding to PC in the unmapped (load) range.
3080 May be the same as PC. */
3083 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3085 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3087 asection
*bfd_section
= section
->the_bfd_section
;
3089 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3090 - bfd_section_vma (abfd
, bfd_section
);
3096 /* Function: overlay_mapped_address (PC, SECTION)
3097 Returns the address corresponding to PC in the mapped (runtime) range.
3098 May be the same as PC. */
3101 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3103 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3105 asection
*bfd_section
= section
->the_bfd_section
;
3107 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3108 - bfd_section_lma (abfd
, bfd_section
);
3114 /* Function: symbol_overlayed_address
3115 Return one of two addresses (relative to the VMA or to the LMA),
3116 depending on whether the section is mapped or not. */
3119 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3121 if (overlay_debugging
)
3123 /* If the symbol has no section, just return its regular address. */
3126 /* If the symbol's section is not an overlay, just return its
3128 if (!section_is_overlay (section
))
3130 /* If the symbol's section is mapped, just return its address. */
3131 if (section_is_mapped (section
))
3134 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3135 * then return its LOADED address rather than its vma address!!
3137 return overlay_unmapped_address (address
, section
);
3142 /* Function: find_pc_overlay (PC)
3143 Return the best-match overlay section for PC:
3144 If PC matches a mapped overlay section's VMA, return that section.
3145 Else if PC matches an unmapped section's VMA, return that section.
3146 Else if PC matches an unmapped section's LMA, return that section. */
3148 struct obj_section
*
3149 find_pc_overlay (CORE_ADDR pc
)
3151 struct objfile
*objfile
;
3152 struct obj_section
*osect
, *best_match
= NULL
;
3154 if (overlay_debugging
)
3156 ALL_OBJSECTIONS (objfile
, osect
)
3157 if (section_is_overlay (osect
))
3159 if (pc_in_mapped_range (pc
, osect
))
3161 if (section_is_mapped (osect
))
3166 else if (pc_in_unmapped_range (pc
, osect
))
3173 /* Function: find_pc_mapped_section (PC)
3174 If PC falls into the VMA address range of an overlay section that is
3175 currently marked as MAPPED, return that section. Else return NULL. */
3177 struct obj_section
*
3178 find_pc_mapped_section (CORE_ADDR pc
)
3180 struct objfile
*objfile
;
3181 struct obj_section
*osect
;
3183 if (overlay_debugging
)
3185 ALL_OBJSECTIONS (objfile
, osect
)
3186 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3193 /* Function: list_overlays_command
3194 Print a list of mapped sections and their PC ranges. */
3197 list_overlays_command (const char *args
, int from_tty
)
3200 struct objfile
*objfile
;
3201 struct obj_section
*osect
;
3203 if (overlay_debugging
)
3205 ALL_OBJSECTIONS (objfile
, osect
)
3206 if (section_is_mapped (osect
))
3208 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3213 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3214 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3215 size
= bfd_get_section_size (osect
->the_bfd_section
);
3216 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3218 printf_filtered ("Section %s, loaded at ", name
);
3219 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3220 puts_filtered (" - ");
3221 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3222 printf_filtered (", mapped at ");
3223 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3224 puts_filtered (" - ");
3225 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3226 puts_filtered ("\n");
3232 printf_filtered (_("No sections are mapped.\n"));
3235 /* Function: map_overlay_command
3236 Mark the named section as mapped (ie. residing at its VMA address). */
3239 map_overlay_command (const char *args
, int from_tty
)
3241 struct objfile
*objfile
, *objfile2
;
3242 struct obj_section
*sec
, *sec2
;
3244 if (!overlay_debugging
)
3245 error (_("Overlay debugging not enabled. Use "
3246 "either the 'overlay auto' or\n"
3247 "the 'overlay manual' command."));
3249 if (args
== 0 || *args
== 0)
3250 error (_("Argument required: name of an overlay section"));
3252 /* First, find a section matching the user supplied argument. */
3253 ALL_OBJSECTIONS (objfile
, sec
)
3254 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3256 /* Now, check to see if the section is an overlay. */
3257 if (!section_is_overlay (sec
))
3258 continue; /* not an overlay section */
3260 /* Mark the overlay as "mapped". */
3261 sec
->ovly_mapped
= 1;
3263 /* Next, make a pass and unmap any sections that are
3264 overlapped by this new section: */
3265 ALL_OBJSECTIONS (objfile2
, sec2
)
3266 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3269 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3270 bfd_section_name (objfile
->obfd
,
3271 sec2
->the_bfd_section
));
3272 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3276 error (_("No overlay section called %s"), args
);
3279 /* Function: unmap_overlay_command
3280 Mark the overlay section as unmapped
3281 (ie. resident in its LMA address range, rather than the VMA range). */
3284 unmap_overlay_command (const char *args
, int from_tty
)
3286 struct objfile
*objfile
;
3287 struct obj_section
*sec
= NULL
;
3289 if (!overlay_debugging
)
3290 error (_("Overlay debugging not enabled. "
3291 "Use either the 'overlay auto' or\n"
3292 "the 'overlay manual' command."));
3294 if (args
== 0 || *args
== 0)
3295 error (_("Argument required: name of an overlay section"));
3297 /* First, find a section matching the user supplied argument. */
3298 ALL_OBJSECTIONS (objfile
, sec
)
3299 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3301 if (!sec
->ovly_mapped
)
3302 error (_("Section %s is not mapped"), args
);
3303 sec
->ovly_mapped
= 0;
3306 error (_("No overlay section called %s"), args
);
3309 /* Function: overlay_auto_command
3310 A utility command to turn on overlay debugging.
3311 Possibly this should be done via a set/show command. */
3314 overlay_auto_command (const char *args
, int from_tty
)
3316 overlay_debugging
= ovly_auto
;
3317 enable_overlay_breakpoints ();
3319 printf_unfiltered (_("Automatic overlay debugging enabled."));
3322 /* Function: overlay_manual_command
3323 A utility command to turn on overlay debugging.
3324 Possibly this should be done via a set/show command. */
3327 overlay_manual_command (const char *args
, int from_tty
)
3329 overlay_debugging
= ovly_on
;
3330 disable_overlay_breakpoints ();
3332 printf_unfiltered (_("Overlay debugging enabled."));
3335 /* Function: overlay_off_command
3336 A utility command to turn on overlay debugging.
3337 Possibly this should be done via a set/show command. */
3340 overlay_off_command (const char *args
, int from_tty
)
3342 overlay_debugging
= ovly_off
;
3343 disable_overlay_breakpoints ();
3345 printf_unfiltered (_("Overlay debugging disabled."));
3349 overlay_load_command (const char *args
, int from_tty
)
3351 struct gdbarch
*gdbarch
= get_current_arch ();
3353 if (gdbarch_overlay_update_p (gdbarch
))
3354 gdbarch_overlay_update (gdbarch
, NULL
);
3356 error (_("This target does not know how to read its overlay state."));
3359 /* Function: overlay_command
3360 A place-holder for a mis-typed command. */
3362 /* Command list chain containing all defined "overlay" subcommands. */
3363 static struct cmd_list_element
*overlaylist
;
3366 overlay_command (const char *args
, int from_tty
)
3369 ("\"overlay\" must be followed by the name of an overlay command.\n");
3370 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3373 /* Target Overlays for the "Simplest" overlay manager:
3375 This is GDB's default target overlay layer. It works with the
3376 minimal overlay manager supplied as an example by Cygnus. The
3377 entry point is via a function pointer "gdbarch_overlay_update",
3378 so targets that use a different runtime overlay manager can
3379 substitute their own overlay_update function and take over the
3382 The overlay_update function pokes around in the target's data structures
3383 to see what overlays are mapped, and updates GDB's overlay mapping with
3386 In this simple implementation, the target data structures are as follows:
3387 unsigned _novlys; /# number of overlay sections #/
3388 unsigned _ovly_table[_novlys][4] = {
3389 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3390 {..., ..., ..., ...},
3392 unsigned _novly_regions; /# number of overlay regions #/
3393 unsigned _ovly_region_table[_novly_regions][3] = {
3394 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3397 These functions will attempt to update GDB's mappedness state in the
3398 symbol section table, based on the target's mappedness state.
3400 To do this, we keep a cached copy of the target's _ovly_table, and
3401 attempt to detect when the cached copy is invalidated. The main
3402 entry point is "simple_overlay_update(SECT), which looks up SECT in
3403 the cached table and re-reads only the entry for that section from
3404 the target (whenever possible). */
3406 /* Cached, dynamically allocated copies of the target data structures: */
3407 static unsigned (*cache_ovly_table
)[4] = 0;
3408 static unsigned cache_novlys
= 0;
3409 static CORE_ADDR cache_ovly_table_base
= 0;
3412 VMA
, OSIZE
, LMA
, MAPPED
3415 /* Throw away the cached copy of _ovly_table. */
3418 simple_free_overlay_table (void)
3420 if (cache_ovly_table
)
3421 xfree (cache_ovly_table
);
3423 cache_ovly_table
= NULL
;
3424 cache_ovly_table_base
= 0;
3427 /* Read an array of ints of size SIZE from the target into a local buffer.
3428 Convert to host order. int LEN is number of ints. */
3431 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3432 int len
, int size
, enum bfd_endian byte_order
)
3434 /* FIXME (alloca): Not safe if array is very large. */
3435 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3438 read_memory (memaddr
, buf
, len
* size
);
3439 for (i
= 0; i
< len
; i
++)
3440 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3443 /* Find and grab a copy of the target _ovly_table
3444 (and _novlys, which is needed for the table's size). */
3447 simple_read_overlay_table (void)
3449 struct bound_minimal_symbol novlys_msym
;
3450 struct bound_minimal_symbol ovly_table_msym
;
3451 struct gdbarch
*gdbarch
;
3453 enum bfd_endian byte_order
;
3455 simple_free_overlay_table ();
3456 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3457 if (! novlys_msym
.minsym
)
3459 error (_("Error reading inferior's overlay table: "
3460 "couldn't find `_novlys' variable\n"
3461 "in inferior. Use `overlay manual' mode."));
3465 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3466 if (! ovly_table_msym
.minsym
)
3468 error (_("Error reading inferior's overlay table: couldn't find "
3469 "`_ovly_table' array\n"
3470 "in inferior. Use `overlay manual' mode."));
3474 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3475 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3476 byte_order
= gdbarch_byte_order (gdbarch
);
3478 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3481 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3482 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3483 read_target_long_array (cache_ovly_table_base
,
3484 (unsigned int *) cache_ovly_table
,
3485 cache_novlys
* 4, word_size
, byte_order
);
3487 return 1; /* SUCCESS */
3490 /* Function: simple_overlay_update_1
3491 A helper function for simple_overlay_update. Assuming a cached copy
3492 of _ovly_table exists, look through it to find an entry whose vma,
3493 lma and size match those of OSECT. Re-read the entry and make sure
3494 it still matches OSECT (else the table may no longer be valid).
3495 Set OSECT's mapped state to match the entry. Return: 1 for
3496 success, 0 for failure. */
3499 simple_overlay_update_1 (struct obj_section
*osect
)
3502 asection
*bsect
= osect
->the_bfd_section
;
3503 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3504 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3505 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3507 for (i
= 0; i
< cache_novlys
; i
++)
3508 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3509 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3511 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3512 (unsigned int *) cache_ovly_table
[i
],
3513 4, word_size
, byte_order
);
3514 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3515 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3517 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3520 else /* Warning! Warning! Target's ovly table has changed! */
3526 /* Function: simple_overlay_update
3527 If OSECT is NULL, then update all sections' mapped state
3528 (after re-reading the entire target _ovly_table).
3529 If OSECT is non-NULL, then try to find a matching entry in the
3530 cached ovly_table and update only OSECT's mapped state.
3531 If a cached entry can't be found or the cache isn't valid, then
3532 re-read the entire cache, and go ahead and update all sections. */
3535 simple_overlay_update (struct obj_section
*osect
)
3537 struct objfile
*objfile
;
3539 /* Were we given an osect to look up? NULL means do all of them. */
3541 /* Have we got a cached copy of the target's overlay table? */
3542 if (cache_ovly_table
!= NULL
)
3544 /* Does its cached location match what's currently in the
3546 struct bound_minimal_symbol minsym
3547 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3549 if (minsym
.minsym
== NULL
)
3550 error (_("Error reading inferior's overlay table: couldn't "
3551 "find `_ovly_table' array\n"
3552 "in inferior. Use `overlay manual' mode."));
3554 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3555 /* Then go ahead and try to look up this single section in
3557 if (simple_overlay_update_1 (osect
))
3558 /* Found it! We're done. */
3562 /* Cached table no good: need to read the entire table anew.
3563 Or else we want all the sections, in which case it's actually
3564 more efficient to read the whole table in one block anyway. */
3566 if (! simple_read_overlay_table ())
3569 /* Now may as well update all sections, even if only one was requested. */
3570 ALL_OBJSECTIONS (objfile
, osect
)
3571 if (section_is_overlay (osect
))
3574 asection
*bsect
= osect
->the_bfd_section
;
3576 for (i
= 0; i
< cache_novlys
; i
++)
3577 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3578 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3579 { /* obj_section matches i'th entry in ovly_table. */
3580 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3581 break; /* finished with inner for loop: break out. */
3586 /* Set the output sections and output offsets for section SECTP in
3587 ABFD. The relocation code in BFD will read these offsets, so we
3588 need to be sure they're initialized. We map each section to itself,
3589 with no offset; this means that SECTP->vma will be honored. */
3592 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3594 sectp
->output_section
= sectp
;
3595 sectp
->output_offset
= 0;
3598 /* Default implementation for sym_relocate. */
3601 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3604 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3606 bfd
*abfd
= sectp
->owner
;
3608 /* We're only interested in sections with relocation
3610 if ((sectp
->flags
& SEC_RELOC
) == 0)
3613 /* We will handle section offsets properly elsewhere, so relocate as if
3614 all sections begin at 0. */
3615 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3617 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3620 /* Relocate the contents of a debug section SECTP in ABFD. The
3621 contents are stored in BUF if it is non-NULL, or returned in a
3622 malloc'd buffer otherwise.
3624 For some platforms and debug info formats, shared libraries contain
3625 relocations against the debug sections (particularly for DWARF-2;
3626 one affected platform is PowerPC GNU/Linux, although it depends on
3627 the version of the linker in use). Also, ELF object files naturally
3628 have unresolved relocations for their debug sections. We need to apply
3629 the relocations in order to get the locations of symbols correct.
3630 Another example that may require relocation processing, is the
3631 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3635 symfile_relocate_debug_section (struct objfile
*objfile
,
3636 asection
*sectp
, bfd_byte
*buf
)
3638 gdb_assert (objfile
->sf
->sym_relocate
);
3640 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3643 struct symfile_segment_data
*
3644 get_symfile_segment_data (bfd
*abfd
)
3646 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3651 return sf
->sym_segments (abfd
);
3655 free_symfile_segment_data (struct symfile_segment_data
*data
)
3657 xfree (data
->segment_bases
);
3658 xfree (data
->segment_sizes
);
3659 xfree (data
->segment_info
);
3664 - DATA, containing segment addresses from the object file ABFD, and
3665 the mapping from ABFD's sections onto the segments that own them,
3667 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3668 segment addresses reported by the target,
3669 store the appropriate offsets for each section in OFFSETS.
3671 If there are fewer entries in SEGMENT_BASES than there are segments
3672 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3674 If there are more entries, then ignore the extra. The target may
3675 not be able to distinguish between an empty data segment and a
3676 missing data segment; a missing text segment is less plausible. */
3679 symfile_map_offsets_to_segments (bfd
*abfd
,
3680 const struct symfile_segment_data
*data
,
3681 struct section_offsets
*offsets
,
3682 int num_segment_bases
,
3683 const CORE_ADDR
*segment_bases
)
3688 /* It doesn't make sense to call this function unless you have some
3689 segment base addresses. */
3690 gdb_assert (num_segment_bases
> 0);
3692 /* If we do not have segment mappings for the object file, we
3693 can not relocate it by segments. */
3694 gdb_assert (data
!= NULL
);
3695 gdb_assert (data
->num_segments
> 0);
3697 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3699 int which
= data
->segment_info
[i
];
3701 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3703 /* Don't bother computing offsets for sections that aren't
3704 loaded as part of any segment. */
3708 /* Use the last SEGMENT_BASES entry as the address of any extra
3709 segments mentioned in DATA->segment_info. */
3710 if (which
> num_segment_bases
)
3711 which
= num_segment_bases
;
3713 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3714 - data
->segment_bases
[which
- 1]);
3721 symfile_find_segment_sections (struct objfile
*objfile
)
3723 bfd
*abfd
= objfile
->obfd
;
3726 struct symfile_segment_data
*data
;
3728 data
= get_symfile_segment_data (objfile
->obfd
);
3732 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3734 free_symfile_segment_data (data
);
3738 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3740 int which
= data
->segment_info
[i
];
3744 if (objfile
->sect_index_text
== -1)
3745 objfile
->sect_index_text
= sect
->index
;
3747 if (objfile
->sect_index_rodata
== -1)
3748 objfile
->sect_index_rodata
= sect
->index
;
3750 else if (which
== 2)
3752 if (objfile
->sect_index_data
== -1)
3753 objfile
->sect_index_data
= sect
->index
;
3755 if (objfile
->sect_index_bss
== -1)
3756 objfile
->sect_index_bss
= sect
->index
;
3760 free_symfile_segment_data (data
);
3763 /* Listen for free_objfile events. */
3766 symfile_free_objfile (struct objfile
*objfile
)
3768 /* Remove the target sections owned by this objfile. */
3769 if (objfile
!= NULL
)
3770 remove_target_sections ((void *) objfile
);
3773 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3774 Expand all symtabs that match the specified criteria.
3775 See quick_symbol_functions.expand_symtabs_matching for details. */
3778 expand_symtabs_matching
3779 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3780 const lookup_name_info
&lookup_name
,
3781 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3782 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3783 enum search_domain kind
)
3785 struct objfile
*objfile
;
3787 ALL_OBJFILES (objfile
)
3790 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3793 expansion_notify
, kind
);
3797 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3798 Map function FUN over every file.
3799 See quick_symbol_functions.map_symbol_filenames for details. */
3802 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3805 struct objfile
*objfile
;
3807 ALL_OBJFILES (objfile
)
3810 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3817 namespace selftests
{
3818 namespace filename_language
{
3820 static void test_filename_language ()
3822 /* This test messes up the filename_language_table global. */
3823 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3825 /* Test deducing an unknown extension. */
3826 language lang
= deduce_language_from_filename ("myfile.blah");
3827 SELF_CHECK (lang
== language_unknown
);
3829 /* Test deducing a known extension. */
3830 lang
= deduce_language_from_filename ("myfile.c");
3831 SELF_CHECK (lang
== language_c
);
3833 /* Test adding a new extension using the internal API. */
3834 add_filename_language (".blah", language_pascal
);
3835 lang
= deduce_language_from_filename ("myfile.blah");
3836 SELF_CHECK (lang
== language_pascal
);
3840 test_set_ext_lang_command ()
3842 /* This test messes up the filename_language_table global. */
3843 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3845 /* Confirm that the .hello extension is not known. */
3846 language lang
= deduce_language_from_filename ("cake.hello");
3847 SELF_CHECK (lang
== language_unknown
);
3849 /* Test adding a new extension using the CLI command. */
3850 gdb::unique_xmalloc_ptr
<char> args_holder (xstrdup (".hello rust"));
3851 ext_args
= args_holder
.get ();
3852 set_ext_lang_command (NULL
, 1, NULL
);
3854 lang
= deduce_language_from_filename ("cake.hello");
3855 SELF_CHECK (lang
== language_rust
);
3857 /* Test overriding an existing extension using the CLI command. */
3858 int size_before
= filename_language_table
.size ();
3859 args_holder
.reset (xstrdup (".hello pascal"));
3860 ext_args
= args_holder
.get ();
3861 set_ext_lang_command (NULL
, 1, NULL
);
3862 int size_after
= filename_language_table
.size ();
3864 lang
= deduce_language_from_filename ("cake.hello");
3865 SELF_CHECK (lang
== language_pascal
);
3866 SELF_CHECK (size_before
== size_after
);
3869 } /* namespace filename_language */
3870 } /* namespace selftests */
3872 #endif /* GDB_SELF_TEST */
3875 _initialize_symfile (void)
3877 struct cmd_list_element
*c
;
3879 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3881 #define READNOW_READNEVER_HELP \
3882 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3883 immediately. This makes the command slower, but may make future operations\n\
3885 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3886 symbolic debug information."
3888 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3889 Load symbol table from executable file FILE.\n\
3890 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3891 OFF is an optional offset which is added to each section address.\n\
3892 The `file' command can also load symbol tables, as well as setting the file\n\
3893 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3894 set_cmd_completer (c
, filename_completer
);
3896 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3897 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3898 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3899 [-s SECT-NAME SECT-ADDR]...\n\
3900 ADDR is the starting address of the file's text.\n\
3901 Each '-s' argument provides a section name and address, and\n\
3902 should be specified if the data and bss segments are not contiguous\n\
3903 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3904 OFF is an optional offset which is added to the default load addresses\n\
3905 of all sections for which no other address was specified.\n"
3906 READNOW_READNEVER_HELP
),
3908 set_cmd_completer (c
, filename_completer
);
3910 c
= add_cmd ("remove-symbol-file", class_files
,
3911 remove_symbol_file_command
, _("\
3912 Remove a symbol file added via the add-symbol-file command.\n\
3913 Usage: remove-symbol-file FILENAME\n\
3914 remove-symbol-file -a ADDRESS\n\
3915 The file to remove can be identified by its filename or by an address\n\
3916 that lies within the boundaries of this symbol file in memory."),
3919 c
= add_cmd ("load", class_files
, load_command
, _("\
3920 Dynamically load FILE into the running program, and record its symbols\n\
3921 for access from GDB.\n\
3922 Usage: load [FILE] [OFFSET]\n\
3923 An optional load OFFSET may also be given as a literal address.\n\
3924 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3925 on its own."), &cmdlist
);
3926 set_cmd_completer (c
, filename_completer
);
3928 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3929 _("Commands for debugging overlays."), &overlaylist
,
3930 "overlay ", 0, &cmdlist
);
3932 add_com_alias ("ovly", "overlay", class_alias
, 1);
3933 add_com_alias ("ov", "overlay", class_alias
, 1);
3935 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3936 _("Assert that an overlay section is mapped."), &overlaylist
);
3938 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3939 _("Assert that an overlay section is unmapped."), &overlaylist
);
3941 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3942 _("List mappings of overlay sections."), &overlaylist
);
3944 add_cmd ("manual", class_support
, overlay_manual_command
,
3945 _("Enable overlay debugging."), &overlaylist
);
3946 add_cmd ("off", class_support
, overlay_off_command
,
3947 _("Disable overlay debugging."), &overlaylist
);
3948 add_cmd ("auto", class_support
, overlay_auto_command
,
3949 _("Enable automatic overlay debugging."), &overlaylist
);
3950 add_cmd ("load-target", class_support
, overlay_load_command
,
3951 _("Read the overlay mapping state from the target."), &overlaylist
);
3953 /* Filename extension to source language lookup table: */
3954 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3956 Set mapping between filename extension and source language."), _("\
3957 Show mapping between filename extension and source language."), _("\
3958 Usage: set extension-language .foo bar"),
3959 set_ext_lang_command
,
3961 &setlist
, &showlist
);
3963 add_info ("extensions", info_ext_lang_command
,
3964 _("All filename extensions associated with a source language."));
3966 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3967 &debug_file_directory
, _("\
3968 Set the directories where separate debug symbols are searched for."), _("\
3969 Show the directories where separate debug symbols are searched for."), _("\
3970 Separate debug symbols are first searched for in the same\n\
3971 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3972 and lastly at the path of the directory of the binary with\n\
3973 each global debug-file-directory component prepended."),
3975 show_debug_file_directory
,
3976 &setlist
, &showlist
);
3978 add_setshow_enum_cmd ("symbol-loading", no_class
,
3979 print_symbol_loading_enums
, &print_symbol_loading
,
3981 Set printing of symbol loading messages."), _("\
3982 Show printing of symbol loading messages."), _("\
3983 off == turn all messages off\n\
3984 brief == print messages for the executable,\n\
3985 and brief messages for shared libraries\n\
3986 full == print messages for the executable,\n\
3987 and messages for each shared library."),
3990 &setprintlist
, &showprintlist
);
3992 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3993 &separate_debug_file_debug
, _("\
3994 Set printing of separate debug info file search debug."), _("\
3995 Show printing of separate debug info file search debug."), _("\
3996 When on, GDB prints the searched locations while looking for separate debug \
3997 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
4000 selftests::register_test
4001 ("filename_language", selftests::filename_language::test_filename_language
);
4002 selftests::register_test
4003 ("set_ext_lang_command",
4004 selftests::filename_language::test_set_ext_lang_command
);