1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2017 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"
51 #include "parser-defs.h"
58 #include "cli/cli-utils.h"
59 #include "common/byte-vector.h"
62 #include <sys/types.h>
70 int (*deprecated_ui_load_progress_hook
) (const char *section
,
72 void (*deprecated_show_load_progress
) (const char *section
,
73 unsigned long section_sent
,
74 unsigned long section_size
,
75 unsigned long total_sent
,
76 unsigned long total_size
);
77 void (*deprecated_pre_add_symbol_hook
) (const char *);
78 void (*deprecated_post_add_symbol_hook
) (void);
80 static void clear_symtab_users_cleanup (void *ignore
);
82 /* Global variables owned by this file. */
83 int readnow_symbol_files
; /* Read full symbols immediately. */
85 /* Functions this file defines. */
87 static void load_command (char *, int);
89 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
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 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
220 new object's 'num_sections' field is set to 0; it must be updated
223 struct section_addr_info
*
224 alloc_section_addr_info (size_t num_sections
)
226 struct section_addr_info
*sap
;
229 size
= (sizeof (struct section_addr_info
)
230 + sizeof (struct other_sections
) * (num_sections
- 1));
231 sap
= (struct section_addr_info
*) xmalloc (size
);
232 memset (sap
, 0, size
);
237 /* Build (allocate and populate) a section_addr_info struct from
238 an existing section table. */
240 extern struct section_addr_info
*
241 build_section_addr_info_from_section_table (const struct target_section
*start
,
242 const struct target_section
*end
)
244 struct section_addr_info
*sap
;
245 const struct target_section
*stp
;
248 sap
= alloc_section_addr_info (end
- start
);
250 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
252 struct bfd_section
*asect
= stp
->the_bfd_section
;
253 bfd
*abfd
= asect
->owner
;
255 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
256 && oidx
< end
- start
)
258 sap
->other
[oidx
].addr
= stp
->addr
;
259 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
260 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
265 sap
->num_sections
= oidx
;
270 /* Create a section_addr_info from section offsets in ABFD. */
272 static struct section_addr_info
*
273 build_section_addr_info_from_bfd (bfd
*abfd
)
275 struct section_addr_info
*sap
;
277 struct bfd_section
*sec
;
279 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
280 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
281 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
283 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
284 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
285 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
289 sap
->num_sections
= i
;
294 /* Create a section_addr_info from section offsets in OBJFILE. */
296 struct section_addr_info
*
297 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
299 struct section_addr_info
*sap
;
302 /* Before reread_symbols gets rewritten it is not safe to call:
303 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
305 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
306 for (i
= 0; i
< sap
->num_sections
; i
++)
308 int sectindex
= sap
->other
[i
].sectindex
;
310 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
315 /* Free all memory allocated by build_section_addr_info_from_section_table. */
318 free_section_addr_info (struct section_addr_info
*sap
)
322 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
323 xfree (sap
->other
[idx
].name
);
327 /* Initialize OBJFILE's sect_index_* members. */
330 init_objfile_sect_indices (struct objfile
*objfile
)
335 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
337 objfile
->sect_index_text
= sect
->index
;
339 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
341 objfile
->sect_index_data
= sect
->index
;
343 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
345 objfile
->sect_index_bss
= sect
->index
;
347 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
349 objfile
->sect_index_rodata
= sect
->index
;
351 /* This is where things get really weird... We MUST have valid
352 indices for the various sect_index_* members or gdb will abort.
353 So if for example, there is no ".text" section, we have to
354 accomodate that. First, check for a file with the standard
355 one or two segments. */
357 symfile_find_segment_sections (objfile
);
359 /* Except when explicitly adding symbol files at some address,
360 section_offsets contains nothing but zeros, so it doesn't matter
361 which slot in section_offsets the individual sect_index_* members
362 index into. So if they are all zero, it is safe to just point
363 all the currently uninitialized indices to the first slot. But
364 beware: if this is the main executable, it may be relocated
365 later, e.g. by the remote qOffsets packet, and then this will
366 be wrong! That's why we try segments first. */
368 for (i
= 0; i
< objfile
->num_sections
; i
++)
370 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
375 if (i
== objfile
->num_sections
)
377 if (objfile
->sect_index_text
== -1)
378 objfile
->sect_index_text
= 0;
379 if (objfile
->sect_index_data
== -1)
380 objfile
->sect_index_data
= 0;
381 if (objfile
->sect_index_bss
== -1)
382 objfile
->sect_index_bss
= 0;
383 if (objfile
->sect_index_rodata
== -1)
384 objfile
->sect_index_rodata
= 0;
388 /* The arguments to place_section. */
390 struct place_section_arg
392 struct section_offsets
*offsets
;
396 /* Find a unique offset to use for loadable section SECT if
397 the user did not provide an offset. */
400 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
402 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
403 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
405 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
407 /* We are only interested in allocated sections. */
408 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
411 /* If the user specified an offset, honor it. */
412 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
415 /* Otherwise, let's try to find a place for the section. */
416 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
423 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
425 int indx
= cur_sec
->index
;
427 /* We don't need to compare against ourself. */
431 /* We can only conflict with allocated sections. */
432 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
435 /* If the section offset is 0, either the section has not been placed
436 yet, or it was the lowest section placed (in which case LOWEST
437 will be past its end). */
438 if (offsets
[indx
] == 0)
441 /* If this section would overlap us, then we must move up. */
442 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
443 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
445 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
446 start_addr
= (start_addr
+ align
- 1) & -align
;
451 /* Otherwise, we appear to be OK. So far. */
456 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
457 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
460 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
461 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
465 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
467 const struct section_addr_info
*addrs
)
471 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
473 /* Now calculate offsets for section that were specified by the caller. */
474 for (i
= 0; i
< addrs
->num_sections
; i
++)
476 const struct other_sections
*osp
;
478 osp
= &addrs
->other
[i
];
479 if (osp
->sectindex
== -1)
482 /* Record all sections in offsets. */
483 /* The section_offsets in the objfile are here filled in using
485 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
489 /* Transform section name S for a name comparison. prelink can split section
490 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
491 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
492 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
493 (`.sbss') section has invalid (increased) virtual address. */
496 addr_section_name (const char *s
)
498 if (strcmp (s
, ".dynbss") == 0)
500 if (strcmp (s
, ".sdynbss") == 0)
506 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
507 their (name, sectindex) pair. sectindex makes the sort by name stable. */
510 addrs_section_compar (const void *ap
, const void *bp
)
512 const struct other_sections
*a
= *((struct other_sections
**) ap
);
513 const struct other_sections
*b
= *((struct other_sections
**) bp
);
516 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
520 return a
->sectindex
- b
->sectindex
;
523 /* Provide sorted array of pointers to sections of ADDRS. The array is
524 terminated by NULL. Caller is responsible to call xfree for it. */
526 static struct other_sections
**
527 addrs_section_sort (struct section_addr_info
*addrs
)
529 struct other_sections
**array
;
532 /* `+ 1' for the NULL terminator. */
533 array
= XNEWVEC (struct other_sections
*, addrs
->num_sections
+ 1);
534 for (i
= 0; i
< addrs
->num_sections
; i
++)
535 array
[i
] = &addrs
->other
[i
];
538 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
543 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
544 also SECTINDEXes specific to ABFD there. This function can be used to
545 rebase ADDRS to start referencing different BFD than before. */
548 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
550 asection
*lower_sect
;
551 CORE_ADDR lower_offset
;
553 struct cleanup
*my_cleanup
;
554 struct section_addr_info
*abfd_addrs
;
555 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
556 struct other_sections
**addrs_to_abfd_addrs
;
558 /* Find lowest loadable section to be used as starting point for
559 continguous sections. */
561 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
562 if (lower_sect
== NULL
)
564 warning (_("no loadable sections found in added symbol-file %s"),
565 bfd_get_filename (abfd
));
569 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
571 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
572 in ABFD. Section names are not unique - there can be multiple sections of
573 the same name. Also the sections of the same name do not have to be
574 adjacent to each other. Some sections may be present only in one of the
575 files. Even sections present in both files do not have to be in the same
578 Use stable sort by name for the sections in both files. Then linearly
579 scan both lists matching as most of the entries as possible. */
581 addrs_sorted
= addrs_section_sort (addrs
);
582 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
584 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
585 make_cleanup_free_section_addr_info (abfd_addrs
);
586 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
587 make_cleanup (xfree
, abfd_addrs_sorted
);
589 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
590 ABFD_ADDRS_SORTED. */
592 addrs_to_abfd_addrs
= XCNEWVEC (struct other_sections
*, addrs
->num_sections
);
593 make_cleanup (xfree
, addrs_to_abfd_addrs
);
595 while (*addrs_sorted
)
597 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
599 while (*abfd_addrs_sorted
600 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
604 if (*abfd_addrs_sorted
605 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
610 /* Make the found item directly addressable from ADDRS. */
611 index_in_addrs
= *addrs_sorted
- addrs
->other
;
612 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
613 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
615 /* Never use the same ABFD entry twice. */
622 /* Calculate offsets for the loadable sections.
623 FIXME! Sections must be in order of increasing loadable section
624 so that contiguous sections can use the lower-offset!!!
626 Adjust offsets if the segments are not contiguous.
627 If the section is contiguous, its offset should be set to
628 the offset of the highest loadable section lower than it
629 (the loadable section directly below it in memory).
630 this_offset = lower_offset = lower_addr - lower_orig_addr */
632 for (i
= 0; i
< addrs
->num_sections
; i
++)
634 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
638 /* This is the index used by BFD. */
639 addrs
->other
[i
].sectindex
= sect
->sectindex
;
641 if (addrs
->other
[i
].addr
!= 0)
643 addrs
->other
[i
].addr
-= sect
->addr
;
644 lower_offset
= addrs
->other
[i
].addr
;
647 addrs
->other
[i
].addr
= lower_offset
;
651 /* addr_section_name transformation is not used for SECT_NAME. */
652 const char *sect_name
= addrs
->other
[i
].name
;
654 /* This section does not exist in ABFD, which is normally
655 unexpected and we want to issue a warning.
657 However, the ELF prelinker does create a few sections which are
658 marked in the main executable as loadable (they are loaded in
659 memory from the DYNAMIC segment) and yet are not present in
660 separate debug info files. This is fine, and should not cause
661 a warning. Shared libraries contain just the section
662 ".gnu.liblist" but it is not marked as loadable there. There is
663 no other way to identify them than by their name as the sections
664 created by prelink have no special flags.
666 For the sections `.bss' and `.sbss' see addr_section_name. */
668 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
669 || strcmp (sect_name
, ".gnu.conflict") == 0
670 || (strcmp (sect_name
, ".bss") == 0
672 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
673 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
674 || (strcmp (sect_name
, ".sbss") == 0
676 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
677 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
678 warning (_("section %s not found in %s"), sect_name
,
679 bfd_get_filename (abfd
));
681 addrs
->other
[i
].addr
= 0;
682 addrs
->other
[i
].sectindex
= -1;
686 do_cleanups (my_cleanup
);
689 /* Parse the user's idea of an offset for dynamic linking, into our idea
690 of how to represent it for fast symbol reading. This is the default
691 version of the sym_fns.sym_offsets function for symbol readers that
692 don't need to do anything special. It allocates a section_offsets table
693 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
696 default_symfile_offsets (struct objfile
*objfile
,
697 const struct section_addr_info
*addrs
)
699 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
700 objfile
->section_offsets
= (struct section_offsets
*)
701 obstack_alloc (&objfile
->objfile_obstack
,
702 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
703 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
704 objfile
->num_sections
, addrs
);
706 /* For relocatable files, all loadable sections will start at zero.
707 The zero is meaningless, so try to pick arbitrary addresses such
708 that no loadable sections overlap. This algorithm is quadratic,
709 but the number of sections in a single object file is generally
711 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
713 struct place_section_arg arg
;
714 bfd
*abfd
= objfile
->obfd
;
717 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
718 /* We do not expect this to happen; just skip this step if the
719 relocatable file has a section with an assigned VMA. */
720 if (bfd_section_vma (abfd
, cur_sec
) != 0)
725 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
727 /* Pick non-overlapping offsets for sections the user did not
729 arg
.offsets
= objfile
->section_offsets
;
731 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
733 /* Correctly filling in the section offsets is not quite
734 enough. Relocatable files have two properties that
735 (most) shared objects do not:
737 - Their debug information will contain relocations. Some
738 shared libraries do also, but many do not, so this can not
741 - If there are multiple code sections they will be loaded
742 at different relative addresses in memory than they are
743 in the objfile, since all sections in the file will start
746 Because GDB has very limited ability to map from an
747 address in debug info to the correct code section,
748 it relies on adding SECT_OFF_TEXT to things which might be
749 code. If we clear all the section offsets, and set the
750 section VMAs instead, then symfile_relocate_debug_section
751 will return meaningful debug information pointing at the
754 GDB has too many different data structures for section
755 addresses - a bfd, objfile, and so_list all have section
756 tables, as does exec_ops. Some of these could probably
759 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
760 cur_sec
= cur_sec
->next
)
762 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
765 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
766 exec_set_section_address (bfd_get_filename (abfd
),
768 offsets
[cur_sec
->index
]);
769 offsets
[cur_sec
->index
] = 0;
774 /* Remember the bfd indexes for the .text, .data, .bss and
776 init_objfile_sect_indices (objfile
);
779 /* Divide the file into segments, which are individual relocatable units.
780 This is the default version of the sym_fns.sym_segments function for
781 symbol readers that do not have an explicit representation of segments.
782 It assumes that object files do not have segments, and fully linked
783 files have a single segment. */
785 struct symfile_segment_data
*
786 default_symfile_segments (bfd
*abfd
)
790 struct symfile_segment_data
*data
;
793 /* Relocatable files contain enough information to position each
794 loadable section independently; they should not be relocated
796 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
799 /* Make sure there is at least one loadable section in the file. */
800 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
802 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
810 low
= bfd_get_section_vma (abfd
, sect
);
811 high
= low
+ bfd_get_section_size (sect
);
813 data
= XCNEW (struct symfile_segment_data
);
814 data
->num_segments
= 1;
815 data
->segment_bases
= XCNEW (CORE_ADDR
);
816 data
->segment_sizes
= XCNEW (CORE_ADDR
);
818 num_sections
= bfd_count_sections (abfd
);
819 data
->segment_info
= XCNEWVEC (int, num_sections
);
821 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
825 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
828 vma
= bfd_get_section_vma (abfd
, sect
);
831 if (vma
+ bfd_get_section_size (sect
) > high
)
832 high
= vma
+ bfd_get_section_size (sect
);
834 data
->segment_info
[i
] = 1;
837 data
->segment_bases
[0] = low
;
838 data
->segment_sizes
[0] = high
- low
;
843 /* This is a convenience function to call sym_read for OBJFILE and
844 possibly force the partial symbols to be read. */
847 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
849 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
850 objfile
->per_bfd
->minsyms_read
= true;
852 /* find_separate_debug_file_in_section should be called only if there is
853 single binary with no existing separate debug info file. */
854 if (!objfile_has_partial_symbols (objfile
)
855 && objfile
->separate_debug_objfile
== NULL
856 && objfile
->separate_debug_objfile_backlink
== NULL
)
858 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
862 /* find_separate_debug_file_in_section uses the same filename for the
863 virtual section-as-bfd like the bfd filename containing the
864 section. Therefore use also non-canonical name form for the same
865 file containing the section. */
866 symbol_file_add_separate (abfd
.get (), objfile
->original_name
,
870 if ((add_flags
& SYMFILE_NO_READ
) == 0)
871 require_partial_symbols (objfile
, 0);
874 /* Initialize entry point information for this objfile. */
877 init_entry_point_info (struct objfile
*objfile
)
879 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
885 /* Save startup file's range of PC addresses to help blockframe.c
886 decide where the bottom of the stack is. */
888 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
890 /* Executable file -- record its entry point so we'll recognize
891 the startup file because it contains the entry point. */
892 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
893 ei
->entry_point_p
= 1;
895 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
896 && bfd_get_start_address (objfile
->obfd
) != 0)
898 /* Some shared libraries may have entry points set and be
899 runnable. There's no clear way to indicate this, so just check
900 for values other than zero. */
901 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
902 ei
->entry_point_p
= 1;
906 /* Examination of non-executable.o files. Short-circuit this stuff. */
907 ei
->entry_point_p
= 0;
910 if (ei
->entry_point_p
)
912 struct obj_section
*osect
;
913 CORE_ADDR entry_point
= ei
->entry_point
;
916 /* Make certain that the address points at real code, and not a
917 function descriptor. */
919 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
923 /* Remove any ISA markers, so that this matches entries in the
926 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
929 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
931 struct bfd_section
*sect
= osect
->the_bfd_section
;
933 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
934 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
935 + bfd_get_section_size (sect
)))
937 ei
->the_bfd_section_index
938 = gdb_bfd_section_index (objfile
->obfd
, sect
);
945 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
949 /* Process a symbol file, as either the main file or as a dynamically
952 This function does not set the OBJFILE's entry-point info.
954 OBJFILE is where the symbols are to be read from.
956 ADDRS is the list of section load addresses. If the user has given
957 an 'add-symbol-file' command, then this is the list of offsets and
958 addresses he or she provided as arguments to the command; or, if
959 we're handling a shared library, these are the actual addresses the
960 sections are loaded at, according to the inferior's dynamic linker
961 (as gleaned by GDB's shared library code). We convert each address
962 into an offset from the section VMA's as it appears in the object
963 file, and then call the file's sym_offsets function to convert this
964 into a format-specific offset table --- a `struct section_offsets'.
966 ADD_FLAGS encodes verbosity level, whether this is main symbol or
967 an extra symbol file such as dynamically loaded code, and wether
968 breakpoint reset should be deferred. */
971 syms_from_objfile_1 (struct objfile
*objfile
,
972 struct section_addr_info
*addrs
,
973 symfile_add_flags add_flags
)
975 struct section_addr_info
*local_addr
= NULL
;
976 struct cleanup
*old_chain
;
977 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
979 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
981 if (objfile
->sf
== NULL
)
983 /* No symbols to load, but we still need to make sure
984 that the section_offsets table is allocated. */
985 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
986 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
988 objfile
->num_sections
= num_sections
;
989 objfile
->section_offsets
990 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
992 memset (objfile
->section_offsets
, 0, size
);
996 /* Make sure that partially constructed symbol tables will be cleaned up
997 if an error occurs during symbol reading. */
998 old_chain
= make_cleanup (null_cleanup
, NULL
);
999 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
1001 /* If ADDRS is NULL, put together a dummy address list.
1002 We now establish the convention that an addr of zero means
1003 no load address was specified. */
1006 local_addr
= alloc_section_addr_info (1);
1007 make_cleanup (xfree
, local_addr
);
1013 /* We will modify the main symbol table, make sure that all its users
1014 will be cleaned up if an error occurs during symbol reading. */
1015 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1017 /* Since no error yet, throw away the old symbol table. */
1019 if (symfile_objfile
!= NULL
)
1021 delete symfile_objfile
;
1022 gdb_assert (symfile_objfile
== NULL
);
1025 /* Currently we keep symbols from the add-symbol-file command.
1026 If the user wants to get rid of them, they should do "symbol-file"
1027 without arguments first. Not sure this is the best behavior
1030 (*objfile
->sf
->sym_new_init
) (objfile
);
1033 /* Convert addr into an offset rather than an absolute address.
1034 We find the lowest address of a loaded segment in the objfile,
1035 and assume that <addr> is where that got loaded.
1037 We no longer warn if the lowest section is not a text segment (as
1038 happens for the PA64 port. */
1039 if (addrs
->num_sections
> 0)
1040 addr_info_make_relative (addrs
, objfile
->obfd
);
1042 /* Initialize symbol reading routines for this objfile, allow complaints to
1043 appear for this new file, and record how verbose to be, then do the
1044 initial symbol reading for this file. */
1046 (*objfile
->sf
->sym_init
) (objfile
);
1047 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1049 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1051 read_symbols (objfile
, add_flags
);
1053 /* Discard cleanups as symbol reading was successful. */
1055 objfile_holder
.release ();
1056 discard_cleanups (old_chain
);
1060 /* Same as syms_from_objfile_1, but also initializes the objfile
1061 entry-point info. */
1064 syms_from_objfile (struct objfile
*objfile
,
1065 struct section_addr_info
*addrs
,
1066 symfile_add_flags add_flags
)
1068 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1069 init_entry_point_info (objfile
);
1072 /* Perform required actions after either reading in the initial
1073 symbols for a new objfile, or mapping in the symbols from a reusable
1074 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1077 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1079 /* If this is the main symbol file we have to clean up all users of the
1080 old main symbol file. Otherwise it is sufficient to fixup all the
1081 breakpoints that may have been redefined by this symbol file. */
1082 if (add_flags
& SYMFILE_MAINLINE
)
1084 /* OK, make it the "real" symbol file. */
1085 symfile_objfile
= objfile
;
1087 clear_symtab_users (add_flags
);
1089 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1091 breakpoint_re_set ();
1094 /* We're done reading the symbol file; finish off complaints. */
1095 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1098 /* Process a symbol file, as either the main file or as a dynamically
1101 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1102 A new reference is acquired by this function.
1104 For NAME description see the objfile constructor.
1106 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1107 extra, such as dynamically loaded code, and what to do with breakpoins.
1109 ADDRS is as described for syms_from_objfile_1, above.
1110 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1112 PARENT is the original objfile if ABFD is a separate debug info file.
1113 Otherwise PARENT is NULL.
1115 Upon success, returns a pointer to the objfile that was added.
1116 Upon failure, jumps back to command level (never returns). */
1118 static struct objfile
*
1119 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1120 symfile_add_flags add_flags
,
1121 struct section_addr_info
*addrs
,
1122 objfile_flags flags
, struct objfile
*parent
)
1124 struct objfile
*objfile
;
1125 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1126 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1127 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1128 && (readnow_symbol_files
1129 || (add_flags
& SYMFILE_NO_READ
) == 0));
1131 if (readnow_symbol_files
)
1133 flags
|= OBJF_READNOW
;
1134 add_flags
&= ~SYMFILE_NO_READ
;
1137 /* Give user a chance to burp if we'd be
1138 interactively wiping out any existing symbols. */
1140 if ((have_full_symbols () || have_partial_symbols ())
1143 && !query (_("Load new symbol table from \"%s\"? "), name
))
1144 error (_("Not confirmed."));
1147 flags
|= OBJF_MAINLINE
;
1148 objfile
= new struct objfile (abfd
, name
, flags
);
1151 add_separate_debug_objfile (objfile
, parent
);
1153 /* We either created a new mapped symbol table, mapped an existing
1154 symbol table file which has not had initial symbol reading
1155 performed, or need to read an unmapped symbol table. */
1158 if (deprecated_pre_add_symbol_hook
)
1159 deprecated_pre_add_symbol_hook (name
);
1162 printf_unfiltered (_("Reading symbols from %s..."), name
);
1164 gdb_flush (gdb_stdout
);
1167 syms_from_objfile (objfile
, addrs
, add_flags
);
1169 /* We now have at least a partial symbol table. Check to see if the
1170 user requested that all symbols be read on initial access via either
1171 the gdb startup command line or on a per symbol file basis. Expand
1172 all partial symbol tables for this objfile if so. */
1174 if ((flags
& OBJF_READNOW
))
1178 printf_unfiltered (_("expanding to full symbols..."));
1180 gdb_flush (gdb_stdout
);
1184 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1187 if (should_print
&& !objfile_has_symbols (objfile
))
1190 printf_unfiltered (_("(no debugging symbols found)..."));
1196 if (deprecated_post_add_symbol_hook
)
1197 deprecated_post_add_symbol_hook ();
1199 printf_unfiltered (_("done.\n"));
1202 /* We print some messages regardless of whether 'from_tty ||
1203 info_verbose' is true, so make sure they go out at the right
1205 gdb_flush (gdb_stdout
);
1207 if (objfile
->sf
== NULL
)
1209 observer_notify_new_objfile (objfile
);
1210 return objfile
; /* No symbols. */
1213 finish_new_objfile (objfile
, add_flags
);
1215 observer_notify_new_objfile (objfile
);
1217 bfd_cache_close_all ();
1221 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1222 see the objfile constructor. */
1225 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1226 symfile_add_flags symfile_flags
,
1227 struct objfile
*objfile
)
1229 struct section_addr_info
*sap
;
1230 struct cleanup
*my_cleanup
;
1232 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1233 because sections of BFD may not match sections of OBJFILE and because
1234 vma may have been modified by tools such as prelink. */
1235 sap
= build_section_addr_info_from_objfile (objfile
);
1236 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1238 symbol_file_add_with_addrs
1239 (bfd
, name
, symfile_flags
, sap
,
1240 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1244 do_cleanups (my_cleanup
);
1247 /* Process the symbol file ABFD, as either the main file or as a
1248 dynamically loaded file.
1249 See symbol_file_add_with_addrs's comments for details. */
1252 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1253 symfile_add_flags add_flags
,
1254 struct section_addr_info
*addrs
,
1255 objfile_flags flags
, struct objfile
*parent
)
1257 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1261 /* Process a symbol file, as either the main file or as a dynamically
1262 loaded file. See symbol_file_add_with_addrs's comments for details. */
1265 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1266 struct section_addr_info
*addrs
, objfile_flags flags
)
1268 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1270 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1274 /* Call symbol_file_add() with default values and update whatever is
1275 affected by the loading of a new main().
1276 Used when the file is supplied in the gdb command line
1277 and by some targets with special loading requirements.
1278 The auxiliary function, symbol_file_add_main_1(), has the flags
1279 argument for the switches that can only be specified in the symbol_file
1283 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1285 symbol_file_add_main_1 (args
, add_flags
, 0);
1289 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1290 objfile_flags flags
)
1292 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1294 symbol_file_add (args
, add_flags
, NULL
, flags
);
1296 /* Getting new symbols may change our opinion about
1297 what is frameless. */
1298 reinit_frame_cache ();
1300 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1301 set_initial_language ();
1305 symbol_file_clear (int from_tty
)
1307 if ((have_full_symbols () || have_partial_symbols ())
1310 ? !query (_("Discard symbol table from `%s'? "),
1311 objfile_name (symfile_objfile
))
1312 : !query (_("Discard symbol table? "))))
1313 error (_("Not confirmed."));
1315 /* solib descriptors may have handles to objfiles. Wipe them before their
1316 objfiles get stale by free_all_objfiles. */
1317 no_shared_libraries (NULL
, from_tty
);
1319 free_all_objfiles ();
1321 gdb_assert (symfile_objfile
== NULL
);
1323 printf_unfiltered (_("No symbol file now.\n"));
1326 /* See symfile.h. */
1328 int separate_debug_file_debug
= 0;
1331 separate_debug_file_exists (const char *name
, unsigned long crc
,
1332 struct objfile
*parent_objfile
)
1334 unsigned long file_crc
;
1336 struct stat parent_stat
, abfd_stat
;
1337 int verified_as_different
;
1339 /* Find a separate debug info file as if symbols would be present in
1340 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1341 section can contain just the basename of PARENT_OBJFILE without any
1342 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1343 the separate debug infos with the same basename can exist. */
1345 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1348 if (separate_debug_file_debug
)
1349 printf_unfiltered (_(" Trying %s\n"), name
);
1351 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
, gnutarget
, -1));
1356 /* Verify symlinks were not the cause of filename_cmp name difference above.
1358 Some operating systems, e.g. Windows, do not provide a meaningful
1359 st_ino; they always set it to zero. (Windows does provide a
1360 meaningful st_dev.) Files accessed from gdbservers that do not
1361 support the vFile:fstat packet will also have st_ino set to zero.
1362 Do not indicate a duplicate library in either case. While there
1363 is no guarantee that a system that provides meaningful inode
1364 numbers will never set st_ino to zero, this is merely an
1365 optimization, so we do not need to worry about false negatives. */
1367 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1368 && abfd_stat
.st_ino
!= 0
1369 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1371 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1372 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1374 verified_as_different
= 1;
1377 verified_as_different
= 0;
1379 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1384 if (crc
!= file_crc
)
1386 unsigned long parent_crc
;
1388 /* If the files could not be verified as different with
1389 bfd_stat then we need to calculate the parent's CRC
1390 to verify whether the files are different or not. */
1392 if (!verified_as_different
)
1394 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1398 if (verified_as_different
|| parent_crc
!= file_crc
)
1399 warning (_("the debug information found in \"%s\""
1400 " does not match \"%s\" (CRC mismatch).\n"),
1401 name
, objfile_name (parent_objfile
));
1409 char *debug_file_directory
= NULL
;
1411 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1412 struct cmd_list_element
*c
, const char *value
)
1414 fprintf_filtered (file
,
1415 _("The directory where separate debug "
1416 "symbols are searched for is \"%s\".\n"),
1420 #if ! defined (DEBUG_SUBDIRECTORY)
1421 #define DEBUG_SUBDIRECTORY ".debug"
1424 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1425 where the original file resides (may not be the same as
1426 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1427 looking for. CANON_DIR is the "realpath" form of DIR.
1428 DIR must contain a trailing '/'.
1429 Returns the path of the file with separate debug info, of NULL. */
1432 find_separate_debug_file (const char *dir
,
1433 const char *canon_dir
,
1434 const char *debuglink
,
1435 unsigned long crc32
, struct objfile
*objfile
)
1440 VEC (char_ptr
) *debugdir_vec
;
1441 struct cleanup
*back_to
;
1444 if (separate_debug_file_debug
)
1445 printf_unfiltered (_("\nLooking for separate debug info (debug link) for "
1446 "%s\n"), objfile_name (objfile
));
1448 /* Set I to std::max (strlen (canon_dir), strlen (dir)). */
1450 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1451 i
= strlen (canon_dir
);
1454 = (char *) xmalloc (strlen (debug_file_directory
) + 1
1456 + strlen (DEBUG_SUBDIRECTORY
)
1458 + strlen (debuglink
)
1461 /* First try in the same directory as the original file. */
1462 strcpy (debugfile
, dir
);
1463 strcat (debugfile
, debuglink
);
1465 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1468 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1469 strcpy (debugfile
, dir
);
1470 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1471 strcat (debugfile
, "/");
1472 strcat (debugfile
, debuglink
);
1474 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1477 /* Then try in the global debugfile directories.
1479 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1480 cause "/..." lookups. */
1482 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1483 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1485 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1487 strcpy (debugfile
, debugdir
);
1488 strcat (debugfile
, "/");
1489 strcat (debugfile
, dir
);
1490 strcat (debugfile
, debuglink
);
1492 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1494 do_cleanups (back_to
);
1498 /* If the file is in the sysroot, try using its base path in the
1499 global debugfile directory. */
1500 if (canon_dir
!= NULL
1501 && filename_ncmp (canon_dir
, gdb_sysroot
,
1502 strlen (gdb_sysroot
)) == 0
1503 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1505 strcpy (debugfile
, debugdir
);
1506 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1507 strcat (debugfile
, "/");
1508 strcat (debugfile
, debuglink
);
1510 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1512 do_cleanups (back_to
);
1518 do_cleanups (back_to
);
1523 /* Modify PATH to contain only "[/]directory/" part of PATH.
1524 If there were no directory separators in PATH, PATH will be empty
1525 string on return. */
1528 terminate_after_last_dir_separator (char *path
)
1532 /* Strip off the final filename part, leaving the directory name,
1533 followed by a slash. The directory can be relative or absolute. */
1534 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1535 if (IS_DIR_SEPARATOR (path
[i
]))
1538 /* If I is -1 then no directory is present there and DIR will be "". */
1542 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1543 Returns pathname, or NULL. */
1546 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1549 unsigned long crc32
;
1551 gdb::unique_xmalloc_ptr
<char> debuglink
1552 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1554 if (debuglink
== NULL
)
1556 /* There's no separate debug info, hence there's no way we could
1557 load it => no warning. */
1561 std::string dir
= objfile_name (objfile
);
1562 terminate_after_last_dir_separator (&dir
[0]);
1563 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1565 debugfile
= find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1566 debuglink
.get (), crc32
, objfile
);
1568 if (debugfile
== NULL
)
1570 /* For PR gdb/9538, try again with realpath (if different from the
1575 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1576 && S_ISLNK (st_buf
.st_mode
))
1578 gdb::unique_xmalloc_ptr
<char> symlink_dir
1579 (lrealpath (objfile_name (objfile
)));
1580 if (symlink_dir
!= NULL
)
1582 terminate_after_last_dir_separator (symlink_dir
.get ());
1583 if (dir
!= symlink_dir
.get ())
1585 /* Different directory, so try using it. */
1586 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1599 /* This is the symbol-file command. Read the file, analyze its
1600 symbols, and add a struct symtab to a symtab list. The syntax of
1601 the command is rather bizarre:
1603 1. The function buildargv implements various quoting conventions
1604 which are undocumented and have little or nothing in common with
1605 the way things are quoted (or not quoted) elsewhere in GDB.
1607 2. Options are used, which are not generally used in GDB (perhaps
1608 "set mapped on", "set readnow on" would be better)
1610 3. The order of options matters, which is contrary to GNU
1611 conventions (because it is confusing and inconvenient). */
1614 symbol_file_command (const char *args
, int from_tty
)
1620 symbol_file_clear (from_tty
);
1624 objfile_flags flags
= OBJF_USERLOADED
;
1625 symfile_add_flags add_flags
= 0;
1629 add_flags
|= SYMFILE_VERBOSE
;
1631 gdb_argv
built_argv (args
);
1632 for (char *arg
: built_argv
)
1634 if (strcmp (arg
, "-readnow") == 0)
1635 flags
|= OBJF_READNOW
;
1636 else if (*arg
== '-')
1637 error (_("unknown option `%s'"), arg
);
1640 symbol_file_add_main_1 (arg
, add_flags
, flags
);
1646 error (_("no symbol file name was specified"));
1650 /* Set the initial language.
1652 FIXME: A better solution would be to record the language in the
1653 psymtab when reading partial symbols, and then use it (if known) to
1654 set the language. This would be a win for formats that encode the
1655 language in an easily discoverable place, such as DWARF. For
1656 stabs, we can jump through hoops looking for specially named
1657 symbols or try to intuit the language from the specific type of
1658 stabs we find, but we can't do that until later when we read in
1662 set_initial_language (void)
1664 enum language lang
= main_language ();
1666 if (lang
== language_unknown
)
1668 char *name
= main_name ();
1669 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1672 lang
= SYMBOL_LANGUAGE (sym
);
1675 if (lang
== language_unknown
)
1677 /* Make C the default language */
1681 set_language (lang
);
1682 expected_language
= current_language
; /* Don't warn the user. */
1685 /* Open the file specified by NAME and hand it off to BFD for
1686 preliminary analysis. Return a newly initialized bfd *, which
1687 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1688 absolute). In case of trouble, error() is called. */
1691 symfile_bfd_open (const char *name
)
1694 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1696 if (!is_target_filename (name
))
1698 char *absolute_name
;
1700 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1702 /* Look down path for it, allocate 2nd new malloc'd copy. */
1703 desc
= openp (getenv ("PATH"),
1704 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1705 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1706 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1709 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1711 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1712 desc
= openp (getenv ("PATH"),
1713 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1714 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1718 perror_with_name (expanded_name
.get ());
1720 make_cleanup (xfree
, absolute_name
);
1721 name
= absolute_name
;
1724 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1725 if (sym_bfd
== NULL
)
1726 error (_("`%s': can't open to read symbols: %s."), name
,
1727 bfd_errmsg (bfd_get_error ()));
1729 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1730 bfd_set_cacheable (sym_bfd
.get (), 1);
1732 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1733 error (_("`%s': can't read symbols: %s."), name
,
1734 bfd_errmsg (bfd_get_error ()));
1736 do_cleanups (back_to
);
1741 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1742 the section was not found. */
1745 get_section_index (struct objfile
*objfile
, const char *section_name
)
1747 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1755 /* Link SF into the global symtab_fns list.
1756 FLAVOUR is the file format that SF handles.
1757 Called on startup by the _initialize routine in each object file format
1758 reader, to register information about each format the reader is prepared
1762 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1764 symtab_fns
.emplace_back (flavour
, sf
);
1767 /* Initialize OBJFILE to read symbols from its associated BFD. It
1768 either returns or calls error(). The result is an initialized
1769 struct sym_fns in the objfile structure, that contains cached
1770 information about the symbol file. */
1772 static const struct sym_fns
*
1773 find_sym_fns (bfd
*abfd
)
1775 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1777 if (our_flavour
== bfd_target_srec_flavour
1778 || our_flavour
== bfd_target_ihex_flavour
1779 || our_flavour
== bfd_target_tekhex_flavour
)
1780 return NULL
; /* No symbols. */
1782 for (const registered_sym_fns
&rsf
: symtab_fns
)
1783 if (our_flavour
== rsf
.sym_flavour
)
1786 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1787 bfd_get_target (abfd
));
1791 /* This function runs the load command of our current target. */
1794 load_command (char *arg
, int from_tty
)
1796 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1800 /* The user might be reloading because the binary has changed. Take
1801 this opportunity to check. */
1802 reopen_exec_file ();
1810 parg
= arg
= get_exec_file (1);
1812 /* Count how many \ " ' tab space there are in the name. */
1813 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1821 /* We need to quote this string so buildargv can pull it apart. */
1822 char *temp
= (char *) xmalloc (strlen (arg
) + count
+ 1 );
1826 make_cleanup (xfree
, temp
);
1829 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1831 strncpy (ptemp
, prev
, parg
- prev
);
1832 ptemp
+= parg
- prev
;
1836 strcpy (ptemp
, prev
);
1842 target_load (arg
, from_tty
);
1844 /* After re-loading the executable, we don't really know which
1845 overlays are mapped any more. */
1846 overlay_cache_invalid
= 1;
1848 do_cleanups (cleanup
);
1851 /* This version of "load" should be usable for any target. Currently
1852 it is just used for remote targets, not inftarg.c or core files,
1853 on the theory that only in that case is it useful.
1855 Avoiding xmodem and the like seems like a win (a) because we don't have
1856 to worry about finding it, and (b) On VMS, fork() is very slow and so
1857 we don't want to run a subprocess. On the other hand, I'm not sure how
1858 performance compares. */
1860 static int validate_download
= 0;
1862 /* Callback service function for generic_load (bfd_map_over_sections). */
1865 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1867 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1869 *sum
+= bfd_get_section_size (asec
);
1872 /* Opaque data for load_section_callback. */
1873 struct load_section_data
{
1874 CORE_ADDR load_offset
;
1875 struct load_progress_data
*progress_data
;
1876 VEC(memory_write_request_s
) *requests
;
1879 /* Opaque data for load_progress. */
1880 struct load_progress_data
{
1881 /* Cumulative data. */
1882 unsigned long write_count
;
1883 unsigned long data_count
;
1884 bfd_size_type total_size
;
1887 /* Opaque data for load_progress for a single section. */
1888 struct load_progress_section_data
{
1889 struct load_progress_data
*cumulative
;
1891 /* Per-section data. */
1892 const char *section_name
;
1893 ULONGEST section_sent
;
1894 ULONGEST section_size
;
1899 /* Target write callback routine for progress reporting. */
1902 load_progress (ULONGEST bytes
, void *untyped_arg
)
1904 struct load_progress_section_data
*args
1905 = (struct load_progress_section_data
*) untyped_arg
;
1906 struct load_progress_data
*totals
;
1909 /* Writing padding data. No easy way to get at the cumulative
1910 stats, so just ignore this. */
1913 totals
= args
->cumulative
;
1915 if (bytes
== 0 && args
->section_sent
== 0)
1917 /* The write is just starting. Let the user know we've started
1919 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1921 hex_string (args
->section_size
),
1922 paddress (target_gdbarch (), args
->lma
));
1926 if (validate_download
)
1928 /* Broken memories and broken monitors manifest themselves here
1929 when bring new computers to life. This doubles already slow
1931 /* NOTE: cagney/1999-10-18: A more efficient implementation
1932 might add a verify_memory() method to the target vector and
1933 then use that. remote.c could implement that method using
1934 the ``qCRC'' packet. */
1935 gdb::byte_vector
check (bytes
);
1937 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1938 error (_("Download verify read failed at %s"),
1939 paddress (target_gdbarch (), args
->lma
));
1940 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1941 error (_("Download verify compare failed at %s"),
1942 paddress (target_gdbarch (), args
->lma
));
1944 totals
->data_count
+= bytes
;
1946 args
->buffer
+= bytes
;
1947 totals
->write_count
+= 1;
1948 args
->section_sent
+= bytes
;
1949 if (check_quit_flag ()
1950 || (deprecated_ui_load_progress_hook
!= NULL
1951 && deprecated_ui_load_progress_hook (args
->section_name
,
1952 args
->section_sent
)))
1953 error (_("Canceled the download"));
1955 if (deprecated_show_load_progress
!= NULL
)
1956 deprecated_show_load_progress (args
->section_name
,
1960 totals
->total_size
);
1963 /* Callback service function for generic_load (bfd_map_over_sections). */
1966 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1968 struct memory_write_request
*new_request
;
1969 struct load_section_data
*args
= (struct load_section_data
*) data
;
1970 struct load_progress_section_data
*section_data
;
1971 bfd_size_type size
= bfd_get_section_size (asec
);
1973 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1975 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1981 new_request
= VEC_safe_push (memory_write_request_s
,
1982 args
->requests
, NULL
);
1983 memset (new_request
, 0, sizeof (struct memory_write_request
));
1984 section_data
= XCNEW (struct load_progress_section_data
);
1985 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1986 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
1988 new_request
->data
= (gdb_byte
*) xmalloc (size
);
1989 new_request
->baton
= section_data
;
1991 buffer
= new_request
->data
;
1993 section_data
->cumulative
= args
->progress_data
;
1994 section_data
->section_name
= sect_name
;
1995 section_data
->section_size
= size
;
1996 section_data
->lma
= new_request
->begin
;
1997 section_data
->buffer
= buffer
;
1999 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2002 /* Clean up an entire memory request vector, including load
2003 data and progress records. */
2006 clear_memory_write_data (void *arg
)
2008 VEC(memory_write_request_s
) **vec_p
= (VEC(memory_write_request_s
) **) arg
;
2009 VEC(memory_write_request_s
) *vec
= *vec_p
;
2011 struct memory_write_request
*mr
;
2013 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2018 VEC_free (memory_write_request_s
, vec
);
2021 static void print_transfer_performance (struct ui_file
*stream
,
2022 unsigned long data_count
,
2023 unsigned long write_count
,
2024 std::chrono::steady_clock::duration d
);
2027 generic_load (const char *args
, int from_tty
)
2029 struct cleanup
*old_cleanups
;
2030 struct load_section_data cbdata
;
2031 struct load_progress_data total_progress
;
2032 struct ui_out
*uiout
= current_uiout
;
2036 memset (&cbdata
, 0, sizeof (cbdata
));
2037 memset (&total_progress
, 0, sizeof (total_progress
));
2038 cbdata
.progress_data
= &total_progress
;
2040 old_cleanups
= make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2043 error_no_arg (_("file to load"));
2045 gdb_argv
argv (args
);
2047 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2049 if (argv
[1] != NULL
)
2053 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2055 /* If the last word was not a valid number then
2056 treat it as a file name with spaces in. */
2057 if (argv
[1] == endptr
)
2058 error (_("Invalid download offset:%s."), argv
[1]);
2060 if (argv
[2] != NULL
)
2061 error (_("Too many parameters."));
2064 /* Open the file for loading. */
2065 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2066 if (loadfile_bfd
== NULL
)
2067 perror_with_name (filename
.get ());
2069 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2071 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2072 bfd_errmsg (bfd_get_error ()));
2075 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2076 (void *) &total_progress
.total_size
);
2078 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2080 using namespace std::chrono
;
2082 steady_clock::time_point start_time
= steady_clock::now ();
2084 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2085 load_progress
) != 0)
2086 error (_("Load failed"));
2088 steady_clock::time_point end_time
= steady_clock::now ();
2090 entry
= bfd_get_start_address (loadfile_bfd
.get ());
2091 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2092 uiout
->text ("Start address ");
2093 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2094 uiout
->text (", load size ");
2095 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2097 regcache_write_pc (get_current_regcache (), entry
);
2099 /* Reset breakpoints, now that we have changed the load image. For
2100 instance, breakpoints may have been set (or reset, by
2101 post_create_inferior) while connected to the target but before we
2102 loaded the program. In that case, the prologue analyzer could
2103 have read instructions from the target to find the right
2104 breakpoint locations. Loading has changed the contents of that
2107 breakpoint_re_set ();
2109 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2110 total_progress
.write_count
,
2111 end_time
- start_time
);
2113 do_cleanups (old_cleanups
);
2116 /* Report on STREAM the performance of a memory transfer operation,
2117 such as 'load'. DATA_COUNT is the number of bytes transferred.
2118 WRITE_COUNT is the number of separate write operations, or 0, if
2119 that information is not available. TIME is how long the operation
2123 print_transfer_performance (struct ui_file
*stream
,
2124 unsigned long data_count
,
2125 unsigned long write_count
,
2126 std::chrono::steady_clock::duration time
)
2128 using namespace std::chrono
;
2129 struct ui_out
*uiout
= current_uiout
;
2131 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2133 uiout
->text ("Transfer rate: ");
2134 if (ms
.count () > 0)
2136 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2138 if (uiout
->is_mi_like_p ())
2140 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2141 uiout
->text (" bits/sec");
2143 else if (rate
< 1024)
2145 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2146 uiout
->text (" bytes/sec");
2150 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2151 uiout
->text (" KB/sec");
2156 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2157 uiout
->text (" bits in <1 sec");
2159 if (write_count
> 0)
2162 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2163 uiout
->text (" bytes/write");
2165 uiout
->text (".\n");
2168 /* This function allows the addition of incrementally linked object files.
2169 It does not modify any state in the target, only in the debugger. */
2170 /* Note: ezannoni 2000-04-13 This function/command used to have a
2171 special case syntax for the rombug target (Rombug is the boot
2172 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2173 rombug case, the user doesn't need to supply a text address,
2174 instead a call to target_link() (in target.c) would supply the
2175 value to use. We are now discontinuing this type of ad hoc syntax. */
2178 add_symbol_file_command (const char *args
, int from_tty
)
2180 struct gdbarch
*gdbarch
= get_current_arch ();
2181 gdb::unique_xmalloc_ptr
<char> filename
;
2185 int expecting_sec_name
= 0;
2186 int expecting_sec_addr
= 0;
2187 struct objfile
*objf
;
2188 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2189 symfile_add_flags add_flags
= 0;
2192 add_flags
|= SYMFILE_VERBOSE
;
2200 struct section_addr_info
*section_addrs
;
2201 std::vector
<sect_opt
> sect_opts
;
2202 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2207 error (_("add-symbol-file takes a file name and an address"));
2209 gdb_argv
argv (args
);
2211 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2213 /* Process the argument. */
2216 /* The first argument is the file name. */
2217 filename
.reset (tilde_expand (arg
));
2219 else if (argcnt
== 1)
2221 /* The second argument is always the text address at which
2222 to load the program. */
2223 sect_opt sect
= { ".text", arg
};
2224 sect_opts
.push_back (sect
);
2228 /* It's an option (starting with '-') or it's an argument
2230 if (expecting_sec_name
)
2232 sect_opt sect
= { arg
, NULL
};
2233 sect_opts
.push_back (sect
);
2234 expecting_sec_name
= 0;
2236 else if (expecting_sec_addr
)
2238 sect_opts
.back ().value
= arg
;
2239 expecting_sec_addr
= 0;
2241 else if (strcmp (arg
, "-readnow") == 0)
2242 flags
|= OBJF_READNOW
;
2243 else if (strcmp (arg
, "-s") == 0)
2245 expecting_sec_name
= 1;
2246 expecting_sec_addr
= 1;
2249 error (_("USAGE: add-symbol-file <filename> <textaddress>"
2250 " [-readnow] [-s <secname> <addr>]*"));
2254 /* This command takes at least two arguments. The first one is a
2255 filename, and the second is the address where this file has been
2256 loaded. Abort now if this address hasn't been provided by the
2258 if (sect_opts
.empty ())
2259 error (_("The address where %s has been loaded is missing"),
2262 /* Print the prompt for the query below. And save the arguments into
2263 a sect_addr_info structure to be passed around to other
2264 functions. We have to split this up into separate print
2265 statements because hex_string returns a local static
2268 printf_unfiltered (_("add symbol table from file \"%s\" at\n"),
2270 section_addrs
= alloc_section_addr_info (sect_opts
.size ());
2271 make_cleanup (xfree
, section_addrs
);
2272 for (sect_opt
§
: sect_opts
)
2275 const char *val
= sect
.value
;
2276 const char *sec
= sect
.name
;
2278 addr
= parse_and_eval_address (val
);
2280 /* Here we store the section offsets in the order they were
2281 entered on the command line. */
2282 section_addrs
->other
[sec_num
].name
= (char *) sec
;
2283 section_addrs
->other
[sec_num
].addr
= addr
;
2284 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2285 paddress (gdbarch
, addr
));
2288 /* The object's sections are initialized when a
2289 call is made to build_objfile_section_table (objfile).
2290 This happens in reread_symbols.
2291 At this point, we don't know what file type this is,
2292 so we can't determine what section names are valid. */
2294 section_addrs
->num_sections
= sec_num
;
2296 if (from_tty
&& (!query ("%s", "")))
2297 error (_("Not confirmed."));
2299 objf
= symbol_file_add (filename
.get (), add_flags
, section_addrs
, flags
);
2301 add_target_sections_of_objfile (objf
);
2303 /* Getting new symbols may change our opinion about what is
2305 reinit_frame_cache ();
2306 do_cleanups (my_cleanups
);
2310 /* This function removes a symbol file that was added via add-symbol-file. */
2313 remove_symbol_file_command (const char *args
, int from_tty
)
2315 struct objfile
*objf
= NULL
;
2316 struct program_space
*pspace
= current_program_space
;
2321 error (_("remove-symbol-file: no symbol file provided"));
2323 gdb_argv
argv (args
);
2325 if (strcmp (argv
[0], "-a") == 0)
2327 /* Interpret the next argument as an address. */
2330 if (argv
[1] == NULL
)
2331 error (_("Missing address argument"));
2333 if (argv
[2] != NULL
)
2334 error (_("Junk after %s"), argv
[1]);
2336 addr
= parse_and_eval_address (argv
[1]);
2340 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2341 && (objf
->flags
& OBJF_SHARED
) != 0
2342 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2346 else if (argv
[0] != NULL
)
2348 /* Interpret the current argument as a file name. */
2350 if (argv
[1] != NULL
)
2351 error (_("Junk after %s"), argv
[0]);
2353 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2357 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2358 && (objf
->flags
& OBJF_SHARED
) != 0
2359 && objf
->pspace
== pspace
2360 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2366 error (_("No symbol file found"));
2369 && !query (_("Remove symbol table from file \"%s\"? "),
2370 objfile_name (objf
)))
2371 error (_("Not confirmed."));
2374 clear_symtab_users (0);
2377 /* Re-read symbols if a symbol-file has changed. */
2380 reread_symbols (void)
2382 struct objfile
*objfile
;
2384 struct stat new_statbuf
;
2386 std::vector
<struct objfile
*> new_objfiles
;
2388 /* With the addition of shared libraries, this should be modified,
2389 the load time should be saved in the partial symbol tables, since
2390 different tables may come from different source files. FIXME.
2391 This routine should then walk down each partial symbol table
2392 and see if the symbol table that it originates from has been changed. */
2394 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2396 if (objfile
->obfd
== NULL
)
2399 /* Separate debug objfiles are handled in the main objfile. */
2400 if (objfile
->separate_debug_objfile_backlink
)
2403 /* If this object is from an archive (what you usually create with
2404 `ar', often called a `static library' on most systems, though
2405 a `shared library' on AIX is also an archive), then you should
2406 stat on the archive name, not member name. */
2407 if (objfile
->obfd
->my_archive
)
2408 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2410 res
= stat (objfile_name (objfile
), &new_statbuf
);
2413 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2414 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2415 objfile_name (objfile
));
2418 new_modtime
= new_statbuf
.st_mtime
;
2419 if (new_modtime
!= objfile
->mtime
)
2421 struct cleanup
*old_cleanups
;
2422 struct section_offsets
*offsets
;
2424 char *original_name
;
2426 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2427 objfile_name (objfile
));
2429 /* There are various functions like symbol_file_add,
2430 symfile_bfd_open, syms_from_objfile, etc., which might
2431 appear to do what we want. But they have various other
2432 effects which we *don't* want. So we just do stuff
2433 ourselves. We don't worry about mapped files (for one thing,
2434 any mapped file will be out of date). */
2436 /* If we get an error, blow away this objfile (not sure if
2437 that is the correct response for things like shared
2439 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
2441 /* We need to do this whenever any symbols go away. */
2442 old_cleanups
= make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2444 if (exec_bfd
!= NULL
2445 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2446 bfd_get_filename (exec_bfd
)) == 0)
2448 /* Reload EXEC_BFD without asking anything. */
2450 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2453 /* Keep the calls order approx. the same as in free_objfile. */
2455 /* Free the separate debug objfiles. It will be
2456 automatically recreated by sym_read. */
2457 free_objfile_separate_debug (objfile
);
2459 /* Remove any references to this objfile in the global
2461 preserve_values (objfile
);
2463 /* Nuke all the state that we will re-read. Much of the following
2464 code which sets things to NULL really is necessary to tell
2465 other parts of GDB that there is nothing currently there.
2467 Try to keep the freeing order compatible with free_objfile. */
2469 if (objfile
->sf
!= NULL
)
2471 (*objfile
->sf
->sym_finish
) (objfile
);
2474 clear_objfile_data (objfile
);
2476 /* Clean up any state BFD has sitting around. */
2478 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2479 char *obfd_filename
;
2481 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2482 /* Open the new BFD before freeing the old one, so that
2483 the filename remains live. */
2484 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2485 objfile
->obfd
= temp
.release ();
2486 if (objfile
->obfd
== NULL
)
2487 error (_("Can't open %s to read symbols."), obfd_filename
);
2490 original_name
= xstrdup (objfile
->original_name
);
2491 make_cleanup (xfree
, original_name
);
2493 /* bfd_openr sets cacheable to true, which is what we want. */
2494 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2495 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2496 bfd_errmsg (bfd_get_error ()));
2498 /* Save the offsets, we will nuke them with the rest of the
2500 num_offsets
= objfile
->num_sections
;
2501 offsets
= ((struct section_offsets
*)
2502 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2503 memcpy (offsets
, objfile
->section_offsets
,
2504 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2506 /* FIXME: Do we have to free a whole linked list, or is this
2508 objfile
->global_psymbols
.clear ();
2509 objfile
->static_psymbols
.clear ();
2511 /* Free the obstacks for non-reusable objfiles. */
2512 psymbol_bcache_free (objfile
->psymbol_cache
);
2513 objfile
->psymbol_cache
= psymbol_bcache_init ();
2515 /* NB: after this call to obstack_free, objfiles_changed
2516 will need to be called (see discussion below). */
2517 obstack_free (&objfile
->objfile_obstack
, 0);
2518 objfile
->sections
= NULL
;
2519 objfile
->compunit_symtabs
= NULL
;
2520 objfile
->psymtabs
= NULL
;
2521 objfile
->psymtabs_addrmap
= NULL
;
2522 objfile
->free_psymtabs
= NULL
;
2523 objfile
->template_symbols
= NULL
;
2525 /* obstack_init also initializes the obstack so it is
2526 empty. We could use obstack_specify_allocation but
2527 gdb_obstack.h specifies the alloc/dealloc functions. */
2528 obstack_init (&objfile
->objfile_obstack
);
2530 /* set_objfile_per_bfd potentially allocates the per-bfd
2531 data on the objfile's obstack (if sharing data across
2532 multiple users is not possible), so it's important to
2533 do it *after* the obstack has been initialized. */
2534 set_objfile_per_bfd (objfile
);
2536 objfile
->original_name
2537 = (char *) obstack_copy0 (&objfile
->objfile_obstack
, original_name
,
2538 strlen (original_name
));
2540 /* Reset the sym_fns pointer. The ELF reader can change it
2541 based on whether .gdb_index is present, and we need it to
2542 start over. PR symtab/15885 */
2543 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2545 build_objfile_section_table (objfile
);
2546 terminate_minimal_symbol_table (objfile
);
2548 /* We use the same section offsets as from last time. I'm not
2549 sure whether that is always correct for shared libraries. */
2550 objfile
->section_offsets
= (struct section_offsets
*)
2551 obstack_alloc (&objfile
->objfile_obstack
,
2552 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2553 memcpy (objfile
->section_offsets
, offsets
,
2554 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2555 objfile
->num_sections
= num_offsets
;
2557 /* What the hell is sym_new_init for, anyway? The concept of
2558 distinguishing between the main file and additional files
2559 in this way seems rather dubious. */
2560 if (objfile
== symfile_objfile
)
2562 (*objfile
->sf
->sym_new_init
) (objfile
);
2565 (*objfile
->sf
->sym_init
) (objfile
);
2566 clear_complaints (&symfile_complaints
, 1, 1);
2568 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2570 /* We are about to read new symbols and potentially also
2571 DWARF information. Some targets may want to pass addresses
2572 read from DWARF DIE's through an adjustment function before
2573 saving them, like MIPS, which may call into
2574 "find_pc_section". When called, that function will make
2575 use of per-objfile program space data.
2577 Since we discarded our section information above, we have
2578 dangling pointers in the per-objfile program space data
2579 structure. Force GDB to update the section mapping
2580 information by letting it know the objfile has changed,
2581 making the dangling pointers point to correct data
2584 objfiles_changed ();
2586 read_symbols (objfile
, 0);
2588 if (!objfile_has_symbols (objfile
))
2591 printf_unfiltered (_("(no debugging symbols found)\n"));
2595 /* We're done reading the symbol file; finish off complaints. */
2596 clear_complaints (&symfile_complaints
, 0, 1);
2598 /* Getting new symbols may change our opinion about what is
2601 reinit_frame_cache ();
2603 /* Discard cleanups as symbol reading was successful. */
2604 objfile_holder
.release ();
2605 discard_cleanups (old_cleanups
);
2607 /* If the mtime has changed between the time we set new_modtime
2608 and now, we *want* this to be out of date, so don't call stat
2610 objfile
->mtime
= new_modtime
;
2611 init_entry_point_info (objfile
);
2613 new_objfiles
.push_back (objfile
);
2617 if (!new_objfiles
.empty ())
2619 clear_symtab_users (0);
2621 /* clear_objfile_data for each objfile was called before freeing it and
2622 observer_notify_new_objfile (NULL) has been called by
2623 clear_symtab_users above. Notify the new files now. */
2624 for (auto iter
: new_objfiles
)
2625 observer_notify_new_objfile (iter
);
2627 /* At least one objfile has changed, so we can consider that
2628 the executable we're debugging has changed too. */
2629 observer_notify_executable_changed ();
2634 struct filename_language
2636 filename_language (const std::string
&ext_
, enum language lang_
)
2637 : ext (ext_
), lang (lang_
)
2644 static std::vector
<filename_language
> filename_language_table
;
2646 /* See symfile.h. */
2649 add_filename_language (const char *ext
, enum language lang
)
2651 filename_language_table
.emplace_back (ext
, lang
);
2654 static char *ext_args
;
2656 show_ext_args (struct ui_file
*file
, int from_tty
,
2657 struct cmd_list_element
*c
, const char *value
)
2659 fprintf_filtered (file
,
2660 _("Mapping between filename extension "
2661 "and source language is \"%s\".\n"),
2666 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2668 char *cp
= ext_args
;
2671 /* First arg is filename extension, starting with '.' */
2673 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2675 /* Find end of first arg. */
2676 while (*cp
&& !isspace (*cp
))
2680 error (_("'%s': two arguments required -- "
2681 "filename extension and language"),
2684 /* Null-terminate first arg. */
2687 /* Find beginning of second arg, which should be a source language. */
2688 cp
= skip_spaces (cp
);
2691 error (_("'%s': two arguments required -- "
2692 "filename extension and language"),
2695 /* Lookup the language from among those we know. */
2696 lang
= language_enum (cp
);
2698 auto it
= filename_language_table
.begin ();
2699 /* Now lookup the filename extension: do we already know it? */
2700 for (; it
!= filename_language_table
.end (); it
++)
2702 if (it
->ext
== ext_args
)
2706 if (it
== filename_language_table
.end ())
2708 /* New file extension. */
2709 add_filename_language (ext_args
, lang
);
2713 /* Redefining a previously known filename extension. */
2716 /* query ("Really make files of type %s '%s'?", */
2717 /* ext_args, language_str (lang)); */
2724 info_ext_lang_command (const char *args
, int from_tty
)
2726 printf_filtered (_("Filename extensions and the languages they represent:"));
2727 printf_filtered ("\n\n");
2728 for (const filename_language
&entry
: filename_language_table
)
2729 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2730 language_str (entry
.lang
));
2734 deduce_language_from_filename (const char *filename
)
2738 if (filename
!= NULL
)
2739 if ((cp
= strrchr (filename
, '.')) != NULL
)
2741 for (const filename_language
&entry
: filename_language_table
)
2742 if (entry
.ext
== cp
)
2746 return language_unknown
;
2749 /* Allocate and initialize a new symbol table.
2750 CUST is from the result of allocate_compunit_symtab. */
2753 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2755 struct objfile
*objfile
= cust
->objfile
;
2756 struct symtab
*symtab
2757 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2760 = (const char *) bcache (filename
, strlen (filename
) + 1,
2761 objfile
->per_bfd
->filename_cache
);
2762 symtab
->fullname
= NULL
;
2763 symtab
->language
= deduce_language_from_filename (filename
);
2765 /* This can be very verbose with lots of headers.
2766 Only print at higher debug levels. */
2767 if (symtab_create_debug
>= 2)
2769 /* Be a bit clever with debugging messages, and don't print objfile
2770 every time, only when it changes. */
2771 static char *last_objfile_name
= NULL
;
2773 if (last_objfile_name
== NULL
2774 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2776 xfree (last_objfile_name
);
2777 last_objfile_name
= xstrdup (objfile_name (objfile
));
2778 fprintf_unfiltered (gdb_stdlog
,
2779 "Creating one or more symtabs for objfile %s ...\n",
2782 fprintf_unfiltered (gdb_stdlog
,
2783 "Created symtab %s for module %s.\n",
2784 host_address_to_string (symtab
), filename
);
2787 /* Add it to CUST's list of symtabs. */
2788 if (cust
->filetabs
== NULL
)
2790 cust
->filetabs
= symtab
;
2791 cust
->last_filetab
= symtab
;
2795 cust
->last_filetab
->next
= symtab
;
2796 cust
->last_filetab
= symtab
;
2799 /* Backlink to the containing compunit symtab. */
2800 symtab
->compunit_symtab
= cust
;
2805 /* Allocate and initialize a new compunit.
2806 NAME is the name of the main source file, if there is one, or some
2807 descriptive text if there are no source files. */
2809 struct compunit_symtab
*
2810 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2812 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2813 struct compunit_symtab
);
2814 const char *saved_name
;
2816 cu
->objfile
= objfile
;
2818 /* The name we record here is only for display/debugging purposes.
2819 Just save the basename to avoid path issues (too long for display,
2820 relative vs absolute, etc.). */
2821 saved_name
= lbasename (name
);
2823 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2824 strlen (saved_name
));
2826 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2828 if (symtab_create_debug
)
2830 fprintf_unfiltered (gdb_stdlog
,
2831 "Created compunit symtab %s for %s.\n",
2832 host_address_to_string (cu
),
2839 /* Hook CU to the objfile it comes from. */
2842 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2844 cu
->next
= cu
->objfile
->compunit_symtabs
;
2845 cu
->objfile
->compunit_symtabs
= cu
;
2849 /* Reset all data structures in gdb which may contain references to
2850 symbol table data. */
2853 clear_symtab_users (symfile_add_flags add_flags
)
2855 /* Someday, we should do better than this, by only blowing away
2856 the things that really need to be blown. */
2858 /* Clear the "current" symtab first, because it is no longer valid.
2859 breakpoint_re_set may try to access the current symtab. */
2860 clear_current_source_symtab_and_line ();
2863 clear_last_displayed_sal ();
2864 clear_pc_function_cache ();
2865 observer_notify_new_objfile (NULL
);
2867 /* Clear globals which might have pointed into a removed objfile.
2868 FIXME: It's not clear which of these are supposed to persist
2869 between expressions and which ought to be reset each time. */
2870 expression_context_block
= NULL
;
2871 innermost_block
= NULL
;
2873 /* Varobj may refer to old symbols, perform a cleanup. */
2874 varobj_invalidate ();
2876 /* Now that the various caches have been cleared, we can re_set
2877 our breakpoints without risking it using stale data. */
2878 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2879 breakpoint_re_set ();
2883 clear_symtab_users_cleanup (void *ignore
)
2885 clear_symtab_users (0);
2889 The following code implements an abstraction for debugging overlay sections.
2891 The target model is as follows:
2892 1) The gnu linker will permit multiple sections to be mapped into the
2893 same VMA, each with its own unique LMA (or load address).
2894 2) It is assumed that some runtime mechanism exists for mapping the
2895 sections, one by one, from the load address into the VMA address.
2896 3) This code provides a mechanism for gdb to keep track of which
2897 sections should be considered to be mapped from the VMA to the LMA.
2898 This information is used for symbol lookup, and memory read/write.
2899 For instance, if a section has been mapped then its contents
2900 should be read from the VMA, otherwise from the LMA.
2902 Two levels of debugger support for overlays are available. One is
2903 "manual", in which the debugger relies on the user to tell it which
2904 overlays are currently mapped. This level of support is
2905 implemented entirely in the core debugger, and the information about
2906 whether a section is mapped is kept in the objfile->obj_section table.
2908 The second level of support is "automatic", and is only available if
2909 the target-specific code provides functionality to read the target's
2910 overlay mapping table, and translate its contents for the debugger
2911 (by updating the mapped state information in the obj_section tables).
2913 The interface is as follows:
2915 overlay map <name> -- tell gdb to consider this section mapped
2916 overlay unmap <name> -- tell gdb to consider this section unmapped
2917 overlay list -- list the sections that GDB thinks are mapped
2918 overlay read-target -- get the target's state of what's mapped
2919 overlay off/manual/auto -- set overlay debugging state
2920 Functional interface:
2921 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2922 section, return that section.
2923 find_pc_overlay(pc): find any overlay section that contains
2924 the pc, either in its VMA or its LMA
2925 section_is_mapped(sect): true if overlay is marked as mapped
2926 section_is_overlay(sect): true if section's VMA != LMA
2927 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2928 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2929 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2930 overlay_mapped_address(...): map an address from section's LMA to VMA
2931 overlay_unmapped_address(...): map an address from section's VMA to LMA
2932 symbol_overlayed_address(...): Return a "current" address for symbol:
2933 either in VMA or LMA depending on whether
2934 the symbol's section is currently mapped. */
2936 /* Overlay debugging state: */
2938 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2939 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2941 /* Function: section_is_overlay (SECTION)
2942 Returns true if SECTION has VMA not equal to LMA, ie.
2943 SECTION is loaded at an address different from where it will "run". */
2946 section_is_overlay (struct obj_section
*section
)
2948 if (overlay_debugging
&& section
)
2950 bfd
*abfd
= section
->objfile
->obfd
;
2951 asection
*bfd_section
= section
->the_bfd_section
;
2953 if (bfd_section_lma (abfd
, bfd_section
) != 0
2954 && bfd_section_lma (abfd
, bfd_section
)
2955 != bfd_section_vma (abfd
, bfd_section
))
2962 /* Function: overlay_invalidate_all (void)
2963 Invalidate the mapped state of all overlay sections (mark it as stale). */
2966 overlay_invalidate_all (void)
2968 struct objfile
*objfile
;
2969 struct obj_section
*sect
;
2971 ALL_OBJSECTIONS (objfile
, sect
)
2972 if (section_is_overlay (sect
))
2973 sect
->ovly_mapped
= -1;
2976 /* Function: section_is_mapped (SECTION)
2977 Returns true if section is an overlay, and is currently mapped.
2979 Access to the ovly_mapped flag is restricted to this function, so
2980 that we can do automatic update. If the global flag
2981 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2982 overlay_invalidate_all. If the mapped state of the particular
2983 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2986 section_is_mapped (struct obj_section
*osect
)
2988 struct gdbarch
*gdbarch
;
2990 if (osect
== 0 || !section_is_overlay (osect
))
2993 switch (overlay_debugging
)
2997 return 0; /* overlay debugging off */
2998 case ovly_auto
: /* overlay debugging automatic */
2999 /* Unles there is a gdbarch_overlay_update function,
3000 there's really nothing useful to do here (can't really go auto). */
3001 gdbarch
= get_objfile_arch (osect
->objfile
);
3002 if (gdbarch_overlay_update_p (gdbarch
))
3004 if (overlay_cache_invalid
)
3006 overlay_invalidate_all ();
3007 overlay_cache_invalid
= 0;
3009 if (osect
->ovly_mapped
== -1)
3010 gdbarch_overlay_update (gdbarch
, osect
);
3012 /* fall thru to manual case */
3013 case ovly_on
: /* overlay debugging manual */
3014 return osect
->ovly_mapped
== 1;
3018 /* Function: pc_in_unmapped_range
3019 If PC falls into the lma range of SECTION, return true, else false. */
3022 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3024 if (section_is_overlay (section
))
3026 bfd
*abfd
= section
->objfile
->obfd
;
3027 asection
*bfd_section
= section
->the_bfd_section
;
3029 /* We assume the LMA is relocated by the same offset as the VMA. */
3030 bfd_vma size
= bfd_get_section_size (bfd_section
);
3031 CORE_ADDR offset
= obj_section_offset (section
);
3033 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3034 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3041 /* Function: pc_in_mapped_range
3042 If PC falls into the vma range of SECTION, return true, else false. */
3045 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3047 if (section_is_overlay (section
))
3049 if (obj_section_addr (section
) <= pc
3050 && pc
< obj_section_endaddr (section
))
3057 /* Return true if the mapped ranges of sections A and B overlap, false
3061 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3063 CORE_ADDR a_start
= obj_section_addr (a
);
3064 CORE_ADDR a_end
= obj_section_endaddr (a
);
3065 CORE_ADDR b_start
= obj_section_addr (b
);
3066 CORE_ADDR b_end
= obj_section_endaddr (b
);
3068 return (a_start
< b_end
&& b_start
< a_end
);
3071 /* Function: overlay_unmapped_address (PC, SECTION)
3072 Returns the address corresponding to PC in the unmapped (load) range.
3073 May be the same as PC. */
3076 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3078 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3080 bfd
*abfd
= section
->objfile
->obfd
;
3081 asection
*bfd_section
= section
->the_bfd_section
;
3083 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3084 - bfd_section_vma (abfd
, bfd_section
);
3090 /* Function: overlay_mapped_address (PC, SECTION)
3091 Returns the address corresponding to PC in the mapped (runtime) range.
3092 May be the same as PC. */
3095 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3097 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3099 bfd
*abfd
= section
->objfile
->obfd
;
3100 asection
*bfd_section
= section
->the_bfd_section
;
3102 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3103 - bfd_section_lma (abfd
, bfd_section
);
3109 /* Function: symbol_overlayed_address
3110 Return one of two addresses (relative to the VMA or to the LMA),
3111 depending on whether the section is mapped or not. */
3114 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3116 if (overlay_debugging
)
3118 /* If the symbol has no section, just return its regular address. */
3121 /* If the symbol's section is not an overlay, just return its
3123 if (!section_is_overlay (section
))
3125 /* If the symbol's section is mapped, just return its address. */
3126 if (section_is_mapped (section
))
3129 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3130 * then return its LOADED address rather than its vma address!!
3132 return overlay_unmapped_address (address
, section
);
3137 /* Function: find_pc_overlay (PC)
3138 Return the best-match overlay section for PC:
3139 If PC matches a mapped overlay section's VMA, return that section.
3140 Else if PC matches an unmapped section's VMA, return that section.
3141 Else if PC matches an unmapped section's LMA, return that section. */
3143 struct obj_section
*
3144 find_pc_overlay (CORE_ADDR pc
)
3146 struct objfile
*objfile
;
3147 struct obj_section
*osect
, *best_match
= NULL
;
3149 if (overlay_debugging
)
3151 ALL_OBJSECTIONS (objfile
, osect
)
3152 if (section_is_overlay (osect
))
3154 if (pc_in_mapped_range (pc
, osect
))
3156 if (section_is_mapped (osect
))
3161 else if (pc_in_unmapped_range (pc
, osect
))
3168 /* Function: find_pc_mapped_section (PC)
3169 If PC falls into the VMA address range of an overlay section that is
3170 currently marked as MAPPED, return that section. Else return NULL. */
3172 struct obj_section
*
3173 find_pc_mapped_section (CORE_ADDR pc
)
3175 struct objfile
*objfile
;
3176 struct obj_section
*osect
;
3178 if (overlay_debugging
)
3180 ALL_OBJSECTIONS (objfile
, osect
)
3181 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3188 /* Function: list_overlays_command
3189 Print a list of mapped sections and their PC ranges. */
3192 list_overlays_command (const char *args
, int from_tty
)
3195 struct objfile
*objfile
;
3196 struct obj_section
*osect
;
3198 if (overlay_debugging
)
3200 ALL_OBJSECTIONS (objfile
, osect
)
3201 if (section_is_mapped (osect
))
3203 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3208 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3209 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3210 size
= bfd_get_section_size (osect
->the_bfd_section
);
3211 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3213 printf_filtered ("Section %s, loaded at ", name
);
3214 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3215 puts_filtered (" - ");
3216 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3217 printf_filtered (", mapped at ");
3218 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3219 puts_filtered (" - ");
3220 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3221 puts_filtered ("\n");
3227 printf_filtered (_("No sections are mapped.\n"));
3230 /* Function: map_overlay_command
3231 Mark the named section as mapped (ie. residing at its VMA address). */
3234 map_overlay_command (const char *args
, int from_tty
)
3236 struct objfile
*objfile
, *objfile2
;
3237 struct obj_section
*sec
, *sec2
;
3239 if (!overlay_debugging
)
3240 error (_("Overlay debugging not enabled. Use "
3241 "either the 'overlay auto' or\n"
3242 "the 'overlay manual' command."));
3244 if (args
== 0 || *args
== 0)
3245 error (_("Argument required: name of an overlay section"));
3247 /* First, find a section matching the user supplied argument. */
3248 ALL_OBJSECTIONS (objfile
, sec
)
3249 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3251 /* Now, check to see if the section is an overlay. */
3252 if (!section_is_overlay (sec
))
3253 continue; /* not an overlay section */
3255 /* Mark the overlay as "mapped". */
3256 sec
->ovly_mapped
= 1;
3258 /* Next, make a pass and unmap any sections that are
3259 overlapped by this new section: */
3260 ALL_OBJSECTIONS (objfile2
, sec2
)
3261 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3264 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3265 bfd_section_name (objfile
->obfd
,
3266 sec2
->the_bfd_section
));
3267 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3271 error (_("No overlay section called %s"), args
);
3274 /* Function: unmap_overlay_command
3275 Mark the overlay section as unmapped
3276 (ie. resident in its LMA address range, rather than the VMA range). */
3279 unmap_overlay_command (const char *args
, int from_tty
)
3281 struct objfile
*objfile
;
3282 struct obj_section
*sec
= NULL
;
3284 if (!overlay_debugging
)
3285 error (_("Overlay debugging not enabled. "
3286 "Use either the 'overlay auto' or\n"
3287 "the 'overlay manual' command."));
3289 if (args
== 0 || *args
== 0)
3290 error (_("Argument required: name of an overlay section"));
3292 /* First, find a section matching the user supplied argument. */
3293 ALL_OBJSECTIONS (objfile
, sec
)
3294 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3296 if (!sec
->ovly_mapped
)
3297 error (_("Section %s is not mapped"), args
);
3298 sec
->ovly_mapped
= 0;
3301 error (_("No overlay section called %s"), args
);
3304 /* Function: overlay_auto_command
3305 A utility command to turn on overlay debugging.
3306 Possibly this should be done via a set/show command. */
3309 overlay_auto_command (const char *args
, int from_tty
)
3311 overlay_debugging
= ovly_auto
;
3312 enable_overlay_breakpoints ();
3314 printf_unfiltered (_("Automatic overlay debugging enabled."));
3317 /* Function: overlay_manual_command
3318 A utility command to turn on overlay debugging.
3319 Possibly this should be done via a set/show command. */
3322 overlay_manual_command (const char *args
, int from_tty
)
3324 overlay_debugging
= ovly_on
;
3325 disable_overlay_breakpoints ();
3327 printf_unfiltered (_("Overlay debugging enabled."));
3330 /* Function: overlay_off_command
3331 A utility command to turn on overlay debugging.
3332 Possibly this should be done via a set/show command. */
3335 overlay_off_command (const char *args
, int from_tty
)
3337 overlay_debugging
= ovly_off
;
3338 disable_overlay_breakpoints ();
3340 printf_unfiltered (_("Overlay debugging disabled."));
3344 overlay_load_command (const char *args
, int from_tty
)
3346 struct gdbarch
*gdbarch
= get_current_arch ();
3348 if (gdbarch_overlay_update_p (gdbarch
))
3349 gdbarch_overlay_update (gdbarch
, NULL
);
3351 error (_("This target does not know how to read its overlay state."));
3354 /* Function: overlay_command
3355 A place-holder for a mis-typed command. */
3357 /* Command list chain containing all defined "overlay" subcommands. */
3358 static struct cmd_list_element
*overlaylist
;
3361 overlay_command (const char *args
, int from_tty
)
3364 ("\"overlay\" must be followed by the name of an overlay command.\n");
3365 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3368 /* Target Overlays for the "Simplest" overlay manager:
3370 This is GDB's default target overlay layer. It works with the
3371 minimal overlay manager supplied as an example by Cygnus. The
3372 entry point is via a function pointer "gdbarch_overlay_update",
3373 so targets that use a different runtime overlay manager can
3374 substitute their own overlay_update function and take over the
3377 The overlay_update function pokes around in the target's data structures
3378 to see what overlays are mapped, and updates GDB's overlay mapping with
3381 In this simple implementation, the target data structures are as follows:
3382 unsigned _novlys; /# number of overlay sections #/
3383 unsigned _ovly_table[_novlys][4] = {
3384 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3385 {..., ..., ..., ...},
3387 unsigned _novly_regions; /# number of overlay regions #/
3388 unsigned _ovly_region_table[_novly_regions][3] = {
3389 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3392 These functions will attempt to update GDB's mappedness state in the
3393 symbol section table, based on the target's mappedness state.
3395 To do this, we keep a cached copy of the target's _ovly_table, and
3396 attempt to detect when the cached copy is invalidated. The main
3397 entry point is "simple_overlay_update(SECT), which looks up SECT in
3398 the cached table and re-reads only the entry for that section from
3399 the target (whenever possible). */
3401 /* Cached, dynamically allocated copies of the target data structures: */
3402 static unsigned (*cache_ovly_table
)[4] = 0;
3403 static unsigned cache_novlys
= 0;
3404 static CORE_ADDR cache_ovly_table_base
= 0;
3407 VMA
, OSIZE
, LMA
, MAPPED
3410 /* Throw away the cached copy of _ovly_table. */
3413 simple_free_overlay_table (void)
3415 if (cache_ovly_table
)
3416 xfree (cache_ovly_table
);
3418 cache_ovly_table
= NULL
;
3419 cache_ovly_table_base
= 0;
3422 /* Read an array of ints of size SIZE from the target into a local buffer.
3423 Convert to host order. int LEN is number of ints. */
3426 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3427 int len
, int size
, enum bfd_endian byte_order
)
3429 /* FIXME (alloca): Not safe if array is very large. */
3430 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3433 read_memory (memaddr
, buf
, len
* size
);
3434 for (i
= 0; i
< len
; i
++)
3435 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3438 /* Find and grab a copy of the target _ovly_table
3439 (and _novlys, which is needed for the table's size). */
3442 simple_read_overlay_table (void)
3444 struct bound_minimal_symbol novlys_msym
;
3445 struct bound_minimal_symbol ovly_table_msym
;
3446 struct gdbarch
*gdbarch
;
3448 enum bfd_endian byte_order
;
3450 simple_free_overlay_table ();
3451 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3452 if (! novlys_msym
.minsym
)
3454 error (_("Error reading inferior's overlay table: "
3455 "couldn't find `_novlys' variable\n"
3456 "in inferior. Use `overlay manual' mode."));
3460 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3461 if (! ovly_table_msym
.minsym
)
3463 error (_("Error reading inferior's overlay table: couldn't find "
3464 "`_ovly_table' array\n"
3465 "in inferior. Use `overlay manual' mode."));
3469 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3470 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3471 byte_order
= gdbarch_byte_order (gdbarch
);
3473 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3476 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3477 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3478 read_target_long_array (cache_ovly_table_base
,
3479 (unsigned int *) cache_ovly_table
,
3480 cache_novlys
* 4, word_size
, byte_order
);
3482 return 1; /* SUCCESS */
3485 /* Function: simple_overlay_update_1
3486 A helper function for simple_overlay_update. Assuming a cached copy
3487 of _ovly_table exists, look through it to find an entry whose vma,
3488 lma and size match those of OSECT. Re-read the entry and make sure
3489 it still matches OSECT (else the table may no longer be valid).
3490 Set OSECT's mapped state to match the entry. Return: 1 for
3491 success, 0 for failure. */
3494 simple_overlay_update_1 (struct obj_section
*osect
)
3497 bfd
*obfd
= osect
->objfile
->obfd
;
3498 asection
*bsect
= osect
->the_bfd_section
;
3499 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3500 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3501 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3503 for (i
= 0; i
< cache_novlys
; i
++)
3504 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3505 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3507 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3508 (unsigned int *) cache_ovly_table
[i
],
3509 4, word_size
, byte_order
);
3510 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3511 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3513 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3516 else /* Warning! Warning! Target's ovly table has changed! */
3522 /* Function: simple_overlay_update
3523 If OSECT is NULL, then update all sections' mapped state
3524 (after re-reading the entire target _ovly_table).
3525 If OSECT is non-NULL, then try to find a matching entry in the
3526 cached ovly_table and update only OSECT's mapped state.
3527 If a cached entry can't be found or the cache isn't valid, then
3528 re-read the entire cache, and go ahead and update all sections. */
3531 simple_overlay_update (struct obj_section
*osect
)
3533 struct objfile
*objfile
;
3535 /* Were we given an osect to look up? NULL means do all of them. */
3537 /* Have we got a cached copy of the target's overlay table? */
3538 if (cache_ovly_table
!= NULL
)
3540 /* Does its cached location match what's currently in the
3542 struct bound_minimal_symbol minsym
3543 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3545 if (minsym
.minsym
== NULL
)
3546 error (_("Error reading inferior's overlay table: couldn't "
3547 "find `_ovly_table' array\n"
3548 "in inferior. Use `overlay manual' mode."));
3550 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3551 /* Then go ahead and try to look up this single section in
3553 if (simple_overlay_update_1 (osect
))
3554 /* Found it! We're done. */
3558 /* Cached table no good: need to read the entire table anew.
3559 Or else we want all the sections, in which case it's actually
3560 more efficient to read the whole table in one block anyway. */
3562 if (! simple_read_overlay_table ())
3565 /* Now may as well update all sections, even if only one was requested. */
3566 ALL_OBJSECTIONS (objfile
, osect
)
3567 if (section_is_overlay (osect
))
3570 bfd
*obfd
= osect
->objfile
->obfd
;
3571 asection
*bsect
= osect
->the_bfd_section
;
3573 for (i
= 0; i
< cache_novlys
; i
++)
3574 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3575 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3576 { /* obj_section matches i'th entry in ovly_table. */
3577 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3578 break; /* finished with inner for loop: break out. */
3583 /* Set the output sections and output offsets for section SECTP in
3584 ABFD. The relocation code in BFD will read these offsets, so we
3585 need to be sure they're initialized. We map each section to itself,
3586 with no offset; this means that SECTP->vma will be honored. */
3589 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3591 sectp
->output_section
= sectp
;
3592 sectp
->output_offset
= 0;
3595 /* Default implementation for sym_relocate. */
3598 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3601 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3603 bfd
*abfd
= sectp
->owner
;
3605 /* We're only interested in sections with relocation
3607 if ((sectp
->flags
& SEC_RELOC
) == 0)
3610 /* We will handle section offsets properly elsewhere, so relocate as if
3611 all sections begin at 0. */
3612 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3614 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3617 /* Relocate the contents of a debug section SECTP in ABFD. The
3618 contents are stored in BUF if it is non-NULL, or returned in a
3619 malloc'd buffer otherwise.
3621 For some platforms and debug info formats, shared libraries contain
3622 relocations against the debug sections (particularly for DWARF-2;
3623 one affected platform is PowerPC GNU/Linux, although it depends on
3624 the version of the linker in use). Also, ELF object files naturally
3625 have unresolved relocations for their debug sections. We need to apply
3626 the relocations in order to get the locations of symbols correct.
3627 Another example that may require relocation processing, is the
3628 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3632 symfile_relocate_debug_section (struct objfile
*objfile
,
3633 asection
*sectp
, bfd_byte
*buf
)
3635 gdb_assert (objfile
->sf
->sym_relocate
);
3637 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3640 struct symfile_segment_data
*
3641 get_symfile_segment_data (bfd
*abfd
)
3643 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3648 return sf
->sym_segments (abfd
);
3652 free_symfile_segment_data (struct symfile_segment_data
*data
)
3654 xfree (data
->segment_bases
);
3655 xfree (data
->segment_sizes
);
3656 xfree (data
->segment_info
);
3661 - DATA, containing segment addresses from the object file ABFD, and
3662 the mapping from ABFD's sections onto the segments that own them,
3664 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3665 segment addresses reported by the target,
3666 store the appropriate offsets for each section in OFFSETS.
3668 If there are fewer entries in SEGMENT_BASES than there are segments
3669 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3671 If there are more entries, then ignore the extra. The target may
3672 not be able to distinguish between an empty data segment and a
3673 missing data segment; a missing text segment is less plausible. */
3676 symfile_map_offsets_to_segments (bfd
*abfd
,
3677 const struct symfile_segment_data
*data
,
3678 struct section_offsets
*offsets
,
3679 int num_segment_bases
,
3680 const CORE_ADDR
*segment_bases
)
3685 /* It doesn't make sense to call this function unless you have some
3686 segment base addresses. */
3687 gdb_assert (num_segment_bases
> 0);
3689 /* If we do not have segment mappings for the object file, we
3690 can not relocate it by segments. */
3691 gdb_assert (data
!= NULL
);
3692 gdb_assert (data
->num_segments
> 0);
3694 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3696 int which
= data
->segment_info
[i
];
3698 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3700 /* Don't bother computing offsets for sections that aren't
3701 loaded as part of any segment. */
3705 /* Use the last SEGMENT_BASES entry as the address of any extra
3706 segments mentioned in DATA->segment_info. */
3707 if (which
> num_segment_bases
)
3708 which
= num_segment_bases
;
3710 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3711 - data
->segment_bases
[which
- 1]);
3718 symfile_find_segment_sections (struct objfile
*objfile
)
3720 bfd
*abfd
= objfile
->obfd
;
3723 struct symfile_segment_data
*data
;
3725 data
= get_symfile_segment_data (objfile
->obfd
);
3729 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3731 free_symfile_segment_data (data
);
3735 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3737 int which
= data
->segment_info
[i
];
3741 if (objfile
->sect_index_text
== -1)
3742 objfile
->sect_index_text
= sect
->index
;
3744 if (objfile
->sect_index_rodata
== -1)
3745 objfile
->sect_index_rodata
= sect
->index
;
3747 else if (which
== 2)
3749 if (objfile
->sect_index_data
== -1)
3750 objfile
->sect_index_data
= sect
->index
;
3752 if (objfile
->sect_index_bss
== -1)
3753 objfile
->sect_index_bss
= sect
->index
;
3757 free_symfile_segment_data (data
);
3760 /* Listen for free_objfile events. */
3763 symfile_free_objfile (struct objfile
*objfile
)
3765 /* Remove the target sections owned by this objfile. */
3766 if (objfile
!= NULL
)
3767 remove_target_sections ((void *) objfile
);
3770 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3771 Expand all symtabs that match the specified criteria.
3772 See quick_symbol_functions.expand_symtabs_matching for details. */
3775 expand_symtabs_matching
3776 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3777 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3778 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3779 enum search_domain kind
)
3781 struct objfile
*objfile
;
3783 ALL_OBJFILES (objfile
)
3786 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3788 expansion_notify
, kind
);
3792 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3793 Map function FUN over every file.
3794 See quick_symbol_functions.map_symbol_filenames for details. */
3797 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3800 struct objfile
*objfile
;
3802 ALL_OBJFILES (objfile
)
3805 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3812 namespace selftests
{
3813 namespace filename_language
{
3815 static void test_filename_language ()
3817 /* This test messes up the filename_language_table global. */
3818 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3820 /* Test deducing an unknown extension. */
3821 language lang
= deduce_language_from_filename ("myfile.blah");
3822 SELF_CHECK (lang
== language_unknown
);
3824 /* Test deducing a known extension. */
3825 lang
= deduce_language_from_filename ("myfile.c");
3826 SELF_CHECK (lang
== language_c
);
3828 /* Test adding a new extension using the internal API. */
3829 add_filename_language (".blah", language_pascal
);
3830 lang
= deduce_language_from_filename ("myfile.blah");
3831 SELF_CHECK (lang
== language_pascal
);
3835 test_set_ext_lang_command ()
3837 /* This test messes up the filename_language_table global. */
3838 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3840 /* Confirm that the .hello extension is not known. */
3841 language lang
= deduce_language_from_filename ("cake.hello");
3842 SELF_CHECK (lang
== language_unknown
);
3844 /* Test adding a new extension using the CLI command. */
3845 gdb::unique_xmalloc_ptr
<char> args_holder (xstrdup (".hello rust"));
3846 ext_args
= args_holder
.get ();
3847 set_ext_lang_command (NULL
, 1, NULL
);
3849 lang
= deduce_language_from_filename ("cake.hello");
3850 SELF_CHECK (lang
== language_rust
);
3852 /* Test overriding an existing extension using the CLI command. */
3853 int size_before
= filename_language_table
.size ();
3854 args_holder
.reset (xstrdup (".hello pascal"));
3855 ext_args
= args_holder
.get ();
3856 set_ext_lang_command (NULL
, 1, NULL
);
3857 int size_after
= filename_language_table
.size ();
3859 lang
= deduce_language_from_filename ("cake.hello");
3860 SELF_CHECK (lang
== language_pascal
);
3861 SELF_CHECK (size_before
== size_after
);
3864 } /* namespace filename_language */
3865 } /* namespace selftests */
3867 #endif /* GDB_SELF_TEST */
3870 _initialize_symfile (void)
3872 struct cmd_list_element
*c
;
3874 observer_attach_free_objfile (symfile_free_objfile
);
3876 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3877 Load symbol table from executable file FILE.\n\
3878 The `file' command can also load symbol tables, as well as setting the file\n\
3879 to execute."), &cmdlist
);
3880 set_cmd_completer (c
, filename_completer
);
3882 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3883 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3884 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR>\
3885 ...]\nADDR is the starting address of the file's text.\n\
3886 The optional arguments are section-name section-address pairs and\n\
3887 should be specified if the data and bss segments are not contiguous\n\
3888 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3890 set_cmd_completer (c
, filename_completer
);
3892 c
= add_cmd ("remove-symbol-file", class_files
,
3893 remove_symbol_file_command
, _("\
3894 Remove a symbol file added via the add-symbol-file command.\n\
3895 Usage: remove-symbol-file FILENAME\n\
3896 remove-symbol-file -a ADDRESS\n\
3897 The file to remove can be identified by its filename or by an address\n\
3898 that lies within the boundaries of this symbol file in memory."),
3901 c
= add_cmd ("load", class_files
, load_command
, _("\
3902 Dynamically load FILE into the running program, and record its symbols\n\
3903 for access from GDB.\n\
3904 An optional load OFFSET may also be given as a literal address.\n\
3905 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3907 Usage: load [FILE] [OFFSET]"), &cmdlist
);
3908 set_cmd_completer (c
, filename_completer
);
3910 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3911 _("Commands for debugging overlays."), &overlaylist
,
3912 "overlay ", 0, &cmdlist
);
3914 add_com_alias ("ovly", "overlay", class_alias
, 1);
3915 add_com_alias ("ov", "overlay", class_alias
, 1);
3917 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3918 _("Assert that an overlay section is mapped."), &overlaylist
);
3920 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3921 _("Assert that an overlay section is unmapped."), &overlaylist
);
3923 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3924 _("List mappings of overlay sections."), &overlaylist
);
3926 add_cmd ("manual", class_support
, overlay_manual_command
,
3927 _("Enable overlay debugging."), &overlaylist
);
3928 add_cmd ("off", class_support
, overlay_off_command
,
3929 _("Disable overlay debugging."), &overlaylist
);
3930 add_cmd ("auto", class_support
, overlay_auto_command
,
3931 _("Enable automatic overlay debugging."), &overlaylist
);
3932 add_cmd ("load-target", class_support
, overlay_load_command
,
3933 _("Read the overlay mapping state from the target."), &overlaylist
);
3935 /* Filename extension to source language lookup table: */
3936 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3938 Set mapping between filename extension and source language."), _("\
3939 Show mapping between filename extension and source language."), _("\
3940 Usage: set extension-language .foo bar"),
3941 set_ext_lang_command
,
3943 &setlist
, &showlist
);
3945 add_info ("extensions", info_ext_lang_command
,
3946 _("All filename extensions associated with a source language."));
3948 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3949 &debug_file_directory
, _("\
3950 Set the directories where separate debug symbols are searched for."), _("\
3951 Show the directories where separate debug symbols are searched for."), _("\
3952 Separate debug symbols are first searched for in the same\n\
3953 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3954 and lastly at the path of the directory of the binary with\n\
3955 each global debug-file-directory component prepended."),
3957 show_debug_file_directory
,
3958 &setlist
, &showlist
);
3960 add_setshow_enum_cmd ("symbol-loading", no_class
,
3961 print_symbol_loading_enums
, &print_symbol_loading
,
3963 Set printing of symbol loading messages."), _("\
3964 Show printing of symbol loading messages."), _("\
3965 off == turn all messages off\n\
3966 brief == print messages for the executable,\n\
3967 and brief messages for shared libraries\n\
3968 full == print messages for the executable,\n\
3969 and messages for each shared library."),
3972 &setprintlist
, &showprintlist
);
3974 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3975 &separate_debug_file_debug
, _("\
3976 Set printing of separate debug info file search debug."), _("\
3977 Show printing of separate debug info file search debug."), _("\
3978 When on, GDB prints the searched locations while looking for separate debug \
3979 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3982 selftests::register_test
3983 ("filename_language", selftests::filename_language::test_filename_language
);
3984 selftests::register_test
3985 ("set_ext_lang_command",
3986 selftests::filename_language::test_set_ext_lang_command
);