1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2018 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
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. */
84 int readnever_symbol_files
; /* Never read full symbols. */
86 /* Functions this file defines. */
88 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
91 static const struct sym_fns
*find_sym_fns (bfd
*);
93 static void overlay_invalidate_all (void);
95 static void simple_free_overlay_table (void);
97 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
100 static int simple_read_overlay_table (void);
102 static int simple_overlay_update_1 (struct obj_section
*);
104 static void symfile_find_segment_sections (struct objfile
*objfile
);
106 /* List of all available sym_fns. On gdb startup, each object file reader
107 calls add_symtab_fns() to register information on each format it is
110 struct registered_sym_fns
112 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
113 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
116 /* BFD flavour that we handle. */
117 enum bfd_flavour sym_flavour
;
119 /* The "vtable" of symbol functions. */
120 const struct sym_fns
*sym_fns
;
123 static std::vector
<registered_sym_fns
> symtab_fns
;
125 /* Values for "set print symbol-loading". */
127 const char print_symbol_loading_off
[] = "off";
128 const char print_symbol_loading_brief
[] = "brief";
129 const char print_symbol_loading_full
[] = "full";
130 static const char *print_symbol_loading_enums
[] =
132 print_symbol_loading_off
,
133 print_symbol_loading_brief
,
134 print_symbol_loading_full
,
137 static const char *print_symbol_loading
= print_symbol_loading_full
;
139 /* If non-zero, shared library symbols will be added automatically
140 when the inferior is created, new libraries are loaded, or when
141 attaching to the inferior. This is almost always what users will
142 want to have happen; but for very large programs, the startup time
143 will be excessive, and so if this is a problem, the user can clear
144 this flag and then add the shared library symbols as needed. Note
145 that there is a potential for confusion, since if the shared
146 library symbols are not loaded, commands like "info fun" will *not*
147 report all the functions that are actually present. */
149 int auto_solib_add
= 1;
152 /* Return non-zero if symbol-loading messages should be printed.
153 FROM_TTY is the standard from_tty argument to gdb commands.
154 If EXEC is non-zero the messages are for the executable.
155 Otherwise, messages are for shared libraries.
156 If FULL is non-zero then the caller is printing a detailed message.
157 E.g., the message includes the shared library name.
158 Otherwise, the caller is printing a brief "summary" message. */
161 print_symbol_loading_p (int from_tty
, int exec
, int full
)
163 if (!from_tty
&& !info_verbose
)
168 /* We don't check FULL for executables, there are few such
169 messages, therefore brief == full. */
170 return print_symbol_loading
!= print_symbol_loading_off
;
173 return print_symbol_loading
== print_symbol_loading_full
;
174 return print_symbol_loading
== print_symbol_loading_brief
;
177 /* True if we are reading a symbol table. */
179 int currently_reading_symtab
= 0;
181 /* Increment currently_reading_symtab and return a cleanup that can be
182 used to decrement it. */
184 scoped_restore_tmpl
<int>
185 increment_reading_symtab (void)
187 gdb_assert (currently_reading_symtab
>= 0);
188 return make_scoped_restore (¤tly_reading_symtab
,
189 currently_reading_symtab
+ 1);
192 /* Remember the lowest-addressed loadable section we've seen.
193 This function is called via bfd_map_over_sections.
195 In case of equal vmas, the section with the largest size becomes the
196 lowest-addressed loadable section.
198 If the vmas and sizes are equal, the last section is considered the
199 lowest-addressed loadable section. */
202 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
204 asection
**lowest
= (asection
**) obj
;
206 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
209 *lowest
= sect
; /* First loadable section */
210 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
211 *lowest
= sect
; /* A lower loadable section */
212 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
213 && (bfd_section_size (abfd
, (*lowest
))
214 <= bfd_section_size (abfd
, sect
)))
218 /* Create a new section_addr_info, with room for NUM_SECTIONS. The
219 new object's 'num_sections' field is set to 0; it must be updated
222 struct section_addr_info
*
223 alloc_section_addr_info (size_t num_sections
)
225 struct section_addr_info
*sap
;
228 size
= (sizeof (struct section_addr_info
)
229 + sizeof (struct other_sections
) * (num_sections
- 1));
230 sap
= (struct section_addr_info
*) xmalloc (size
);
231 memset (sap
, 0, size
);
236 /* Build (allocate and populate) a section_addr_info struct from
237 an existing section table. */
239 extern struct section_addr_info
*
240 build_section_addr_info_from_section_table (const struct target_section
*start
,
241 const struct target_section
*end
)
243 struct section_addr_info
*sap
;
244 const struct target_section
*stp
;
247 sap
= alloc_section_addr_info (end
- start
);
249 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
251 struct bfd_section
*asect
= stp
->the_bfd_section
;
252 bfd
*abfd
= asect
->owner
;
254 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
255 && oidx
< end
- start
)
257 sap
->other
[oidx
].addr
= stp
->addr
;
258 sap
->other
[oidx
].name
= xstrdup (bfd_section_name (abfd
, asect
));
259 sap
->other
[oidx
].sectindex
= gdb_bfd_section_index (abfd
, asect
);
264 sap
->num_sections
= oidx
;
269 /* Create a section_addr_info from section offsets in ABFD. */
271 static struct section_addr_info
*
272 build_section_addr_info_from_bfd (bfd
*abfd
)
274 struct section_addr_info
*sap
;
276 struct bfd_section
*sec
;
278 sap
= alloc_section_addr_info (bfd_count_sections (abfd
));
279 for (i
= 0, sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
280 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
282 sap
->other
[i
].addr
= bfd_get_section_vma (abfd
, sec
);
283 sap
->other
[i
].name
= xstrdup (bfd_get_section_name (abfd
, sec
));
284 sap
->other
[i
].sectindex
= gdb_bfd_section_index (abfd
, sec
);
288 sap
->num_sections
= i
;
293 /* Create a section_addr_info from section offsets in OBJFILE. */
295 struct section_addr_info
*
296 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
298 struct section_addr_info
*sap
;
301 /* Before reread_symbols gets rewritten it is not safe to call:
302 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
304 sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
305 for (i
= 0; i
< sap
->num_sections
; i
++)
307 int sectindex
= sap
->other
[i
].sectindex
;
309 sap
->other
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
314 /* Free all memory allocated by build_section_addr_info_from_section_table. */
317 free_section_addr_info (struct section_addr_info
*sap
)
321 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
322 xfree (sap
->other
[idx
].name
);
326 /* Initialize OBJFILE's sect_index_* members. */
329 init_objfile_sect_indices (struct objfile
*objfile
)
334 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
336 objfile
->sect_index_text
= sect
->index
;
338 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
340 objfile
->sect_index_data
= sect
->index
;
342 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
344 objfile
->sect_index_bss
= sect
->index
;
346 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
348 objfile
->sect_index_rodata
= sect
->index
;
350 /* This is where things get really weird... We MUST have valid
351 indices for the various sect_index_* members or gdb will abort.
352 So if for example, there is no ".text" section, we have to
353 accomodate that. First, check for a file with the standard
354 one or two segments. */
356 symfile_find_segment_sections (objfile
);
358 /* Except when explicitly adding symbol files at some address,
359 section_offsets contains nothing but zeros, so it doesn't matter
360 which slot in section_offsets the individual sect_index_* members
361 index into. So if they are all zero, it is safe to just point
362 all the currently uninitialized indices to the first slot. But
363 beware: if this is the main executable, it may be relocated
364 later, e.g. by the remote qOffsets packet, and then this will
365 be wrong! That's why we try segments first. */
367 for (i
= 0; i
< objfile
->num_sections
; i
++)
369 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
374 if (i
== objfile
->num_sections
)
376 if (objfile
->sect_index_text
== -1)
377 objfile
->sect_index_text
= 0;
378 if (objfile
->sect_index_data
== -1)
379 objfile
->sect_index_data
= 0;
380 if (objfile
->sect_index_bss
== -1)
381 objfile
->sect_index_bss
= 0;
382 if (objfile
->sect_index_rodata
== -1)
383 objfile
->sect_index_rodata
= 0;
387 /* The arguments to place_section. */
389 struct place_section_arg
391 struct section_offsets
*offsets
;
395 /* Find a unique offset to use for loadable section SECT if
396 the user did not provide an offset. */
399 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
401 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
402 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
404 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
406 /* We are only interested in allocated sections. */
407 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
410 /* If the user specified an offset, honor it. */
411 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
414 /* Otherwise, let's try to find a place for the section. */
415 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
422 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
424 int indx
= cur_sec
->index
;
426 /* We don't need to compare against ourself. */
430 /* We can only conflict with allocated sections. */
431 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
434 /* If the section offset is 0, either the section has not been placed
435 yet, or it was the lowest section placed (in which case LOWEST
436 will be past its end). */
437 if (offsets
[indx
] == 0)
440 /* If this section would overlap us, then we must move up. */
441 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
442 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
444 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
445 start_addr
= (start_addr
+ align
- 1) & -align
;
450 /* Otherwise, we appear to be OK. So far. */
455 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
456 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
459 /* Store struct section_addr_info as prepared (made relative and with SECTINDEX
460 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
464 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
466 const struct section_addr_info
*addrs
)
470 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
472 /* Now calculate offsets for section that were specified by the caller. */
473 for (i
= 0; i
< addrs
->num_sections
; i
++)
475 const struct other_sections
*osp
;
477 osp
= &addrs
->other
[i
];
478 if (osp
->sectindex
== -1)
481 /* Record all sections in offsets. */
482 /* The section_offsets in the objfile are here filled in using
484 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
488 /* Transform section name S for a name comparison. prelink can split section
489 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
490 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
491 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
492 (`.sbss') section has invalid (increased) virtual address. */
495 addr_section_name (const char *s
)
497 if (strcmp (s
, ".dynbss") == 0)
499 if (strcmp (s
, ".sdynbss") == 0)
505 /* qsort comparator for addrs_section_sort. Sort entries in ascending order by
506 their (name, sectindex) pair. sectindex makes the sort by name stable. */
509 addrs_section_compar (const void *ap
, const void *bp
)
511 const struct other_sections
*a
= *((struct other_sections
**) ap
);
512 const struct other_sections
*b
= *((struct other_sections
**) bp
);
515 retval
= strcmp (addr_section_name (a
->name
), addr_section_name (b
->name
));
519 return a
->sectindex
- b
->sectindex
;
522 /* Provide sorted array of pointers to sections of ADDRS. The array is
523 terminated by NULL. Caller is responsible to call xfree for it. */
525 static struct other_sections
**
526 addrs_section_sort (struct section_addr_info
*addrs
)
528 struct other_sections
**array
;
531 /* `+ 1' for the NULL terminator. */
532 array
= XNEWVEC (struct other_sections
*, addrs
->num_sections
+ 1);
533 for (i
= 0; i
< addrs
->num_sections
; i
++)
534 array
[i
] = &addrs
->other
[i
];
537 qsort (array
, i
, sizeof (*array
), addrs_section_compar
);
542 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
543 also SECTINDEXes specific to ABFD there. This function can be used to
544 rebase ADDRS to start referencing different BFD than before. */
547 addr_info_make_relative (struct section_addr_info
*addrs
, bfd
*abfd
)
549 asection
*lower_sect
;
550 CORE_ADDR lower_offset
;
552 struct cleanup
*my_cleanup
;
553 struct section_addr_info
*abfd_addrs
;
554 struct other_sections
**addrs_sorted
, **abfd_addrs_sorted
;
555 struct other_sections
**addrs_to_abfd_addrs
;
557 /* Find lowest loadable section to be used as starting point for
558 continguous sections. */
560 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
561 if (lower_sect
== NULL
)
563 warning (_("no loadable sections found in added symbol-file %s"),
564 bfd_get_filename (abfd
));
568 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
570 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
571 in ABFD. Section names are not unique - there can be multiple sections of
572 the same name. Also the sections of the same name do not have to be
573 adjacent to each other. Some sections may be present only in one of the
574 files. Even sections present in both files do not have to be in the same
577 Use stable sort by name for the sections in both files. Then linearly
578 scan both lists matching as most of the entries as possible. */
580 addrs_sorted
= addrs_section_sort (addrs
);
581 my_cleanup
= make_cleanup (xfree
, addrs_sorted
);
583 abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
584 make_cleanup_free_section_addr_info (abfd_addrs
);
585 abfd_addrs_sorted
= addrs_section_sort (abfd_addrs
);
586 make_cleanup (xfree
, abfd_addrs_sorted
);
588 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
589 ABFD_ADDRS_SORTED. */
591 addrs_to_abfd_addrs
= XCNEWVEC (struct other_sections
*, addrs
->num_sections
);
592 make_cleanup (xfree
, addrs_to_abfd_addrs
);
594 while (*addrs_sorted
)
596 const char *sect_name
= addr_section_name ((*addrs_sorted
)->name
);
598 while (*abfd_addrs_sorted
599 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
603 if (*abfd_addrs_sorted
604 && strcmp (addr_section_name ((*abfd_addrs_sorted
)->name
),
609 /* Make the found item directly addressable from ADDRS. */
610 index_in_addrs
= *addrs_sorted
- addrs
->other
;
611 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
612 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_addrs_sorted
;
614 /* Never use the same ABFD entry twice. */
621 /* Calculate offsets for the loadable sections.
622 FIXME! Sections must be in order of increasing loadable section
623 so that contiguous sections can use the lower-offset!!!
625 Adjust offsets if the segments are not contiguous.
626 If the section is contiguous, its offset should be set to
627 the offset of the highest loadable section lower than it
628 (the loadable section directly below it in memory).
629 this_offset = lower_offset = lower_addr - lower_orig_addr */
631 for (i
= 0; i
< addrs
->num_sections
; i
++)
633 struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
637 /* This is the index used by BFD. */
638 addrs
->other
[i
].sectindex
= sect
->sectindex
;
640 if (addrs
->other
[i
].addr
!= 0)
642 addrs
->other
[i
].addr
-= sect
->addr
;
643 lower_offset
= addrs
->other
[i
].addr
;
646 addrs
->other
[i
].addr
= lower_offset
;
650 /* addr_section_name transformation is not used for SECT_NAME. */
651 const char *sect_name
= addrs
->other
[i
].name
;
653 /* This section does not exist in ABFD, which is normally
654 unexpected and we want to issue a warning.
656 However, the ELF prelinker does create a few sections which are
657 marked in the main executable as loadable (they are loaded in
658 memory from the DYNAMIC segment) and yet are not present in
659 separate debug info files. This is fine, and should not cause
660 a warning. Shared libraries contain just the section
661 ".gnu.liblist" but it is not marked as loadable there. There is
662 no other way to identify them than by their name as the sections
663 created by prelink have no special flags.
665 For the sections `.bss' and `.sbss' see addr_section_name. */
667 if (!(strcmp (sect_name
, ".gnu.liblist") == 0
668 || strcmp (sect_name
, ".gnu.conflict") == 0
669 || (strcmp (sect_name
, ".bss") == 0
671 && strcmp (addrs
->other
[i
- 1].name
, ".dynbss") == 0
672 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
673 || (strcmp (sect_name
, ".sbss") == 0
675 && strcmp (addrs
->other
[i
- 1].name
, ".sdynbss") == 0
676 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
677 warning (_("section %s not found in %s"), sect_name
,
678 bfd_get_filename (abfd
));
680 addrs
->other
[i
].addr
= 0;
681 addrs
->other
[i
].sectindex
= -1;
685 do_cleanups (my_cleanup
);
688 /* Parse the user's idea of an offset for dynamic linking, into our idea
689 of how to represent it for fast symbol reading. This is the default
690 version of the sym_fns.sym_offsets function for symbol readers that
691 don't need to do anything special. It allocates a section_offsets table
692 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
695 default_symfile_offsets (struct objfile
*objfile
,
696 const struct section_addr_info
*addrs
)
698 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
699 objfile
->section_offsets
= (struct section_offsets
*)
700 obstack_alloc (&objfile
->objfile_obstack
,
701 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
702 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
703 objfile
->num_sections
, addrs
);
705 /* For relocatable files, all loadable sections will start at zero.
706 The zero is meaningless, so try to pick arbitrary addresses such
707 that no loadable sections overlap. This algorithm is quadratic,
708 but the number of sections in a single object file is generally
710 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
712 struct place_section_arg arg
;
713 bfd
*abfd
= objfile
->obfd
;
716 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
717 /* We do not expect this to happen; just skip this step if the
718 relocatable file has a section with an assigned VMA. */
719 if (bfd_section_vma (abfd
, cur_sec
) != 0)
724 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
726 /* Pick non-overlapping offsets for sections the user did not
728 arg
.offsets
= objfile
->section_offsets
;
730 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
732 /* Correctly filling in the section offsets is not quite
733 enough. Relocatable files have two properties that
734 (most) shared objects do not:
736 - Their debug information will contain relocations. Some
737 shared libraries do also, but many do not, so this can not
740 - If there are multiple code sections they will be loaded
741 at different relative addresses in memory than they are
742 in the objfile, since all sections in the file will start
745 Because GDB has very limited ability to map from an
746 address in debug info to the correct code section,
747 it relies on adding SECT_OFF_TEXT to things which might be
748 code. If we clear all the section offsets, and set the
749 section VMAs instead, then symfile_relocate_debug_section
750 will return meaningful debug information pointing at the
753 GDB has too many different data structures for section
754 addresses - a bfd, objfile, and so_list all have section
755 tables, as does exec_ops. Some of these could probably
758 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
759 cur_sec
= cur_sec
->next
)
761 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
764 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
765 exec_set_section_address (bfd_get_filename (abfd
),
767 offsets
[cur_sec
->index
]);
768 offsets
[cur_sec
->index
] = 0;
773 /* Remember the bfd indexes for the .text, .data, .bss and
775 init_objfile_sect_indices (objfile
);
778 /* Divide the file into segments, which are individual relocatable units.
779 This is the default version of the sym_fns.sym_segments function for
780 symbol readers that do not have an explicit representation of segments.
781 It assumes that object files do not have segments, and fully linked
782 files have a single segment. */
784 struct symfile_segment_data
*
785 default_symfile_segments (bfd
*abfd
)
789 struct symfile_segment_data
*data
;
792 /* Relocatable files contain enough information to position each
793 loadable section independently; they should not be relocated
795 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
798 /* Make sure there is at least one loadable section in the file. */
799 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
801 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
809 low
= bfd_get_section_vma (abfd
, sect
);
810 high
= low
+ bfd_get_section_size (sect
);
812 data
= XCNEW (struct symfile_segment_data
);
813 data
->num_segments
= 1;
814 data
->segment_bases
= XCNEW (CORE_ADDR
);
815 data
->segment_sizes
= XCNEW (CORE_ADDR
);
817 num_sections
= bfd_count_sections (abfd
);
818 data
->segment_info
= XCNEWVEC (int, num_sections
);
820 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
824 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
827 vma
= bfd_get_section_vma (abfd
, sect
);
830 if (vma
+ bfd_get_section_size (sect
) > high
)
831 high
= vma
+ bfd_get_section_size (sect
);
833 data
->segment_info
[i
] = 1;
836 data
->segment_bases
[0] = low
;
837 data
->segment_sizes
[0] = high
- low
;
842 /* This is a convenience function to call sym_read for OBJFILE and
843 possibly force the partial symbols to be read. */
846 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
848 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
849 objfile
->per_bfd
->minsyms_read
= true;
851 /* find_separate_debug_file_in_section should be called only if there is
852 single binary with no existing separate debug info file. */
853 if (!objfile_has_partial_symbols (objfile
)
854 && objfile
->separate_debug_objfile
== NULL
855 && objfile
->separate_debug_objfile_backlink
== NULL
)
857 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
861 /* find_separate_debug_file_in_section uses the same filename for the
862 virtual section-as-bfd like the bfd filename containing the
863 section. Therefore use also non-canonical name form for the same
864 file containing the section. */
865 symbol_file_add_separate (abfd
.get (), objfile
->original_name
,
869 if ((add_flags
& SYMFILE_NO_READ
) == 0)
870 require_partial_symbols (objfile
, 0);
873 /* Initialize entry point information for this objfile. */
876 init_entry_point_info (struct objfile
*objfile
)
878 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
884 /* Save startup file's range of PC addresses to help blockframe.c
885 decide where the bottom of the stack is. */
887 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
889 /* Executable file -- record its entry point so we'll recognize
890 the startup file because it contains the entry point. */
891 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
892 ei
->entry_point_p
= 1;
894 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
895 && bfd_get_start_address (objfile
->obfd
) != 0)
897 /* Some shared libraries may have entry points set and be
898 runnable. There's no clear way to indicate this, so just check
899 for values other than zero. */
900 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
901 ei
->entry_point_p
= 1;
905 /* Examination of non-executable.o files. Short-circuit this stuff. */
906 ei
->entry_point_p
= 0;
909 if (ei
->entry_point_p
)
911 struct obj_section
*osect
;
912 CORE_ADDR entry_point
= ei
->entry_point
;
915 /* Make certain that the address points at real code, and not a
916 function descriptor. */
918 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
922 /* Remove any ISA markers, so that this matches entries in the
925 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
928 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
930 struct bfd_section
*sect
= osect
->the_bfd_section
;
932 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
933 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
934 + bfd_get_section_size (sect
)))
936 ei
->the_bfd_section_index
937 = gdb_bfd_section_index (objfile
->obfd
, sect
);
944 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
948 /* Process a symbol file, as either the main file or as a dynamically
951 This function does not set the OBJFILE's entry-point info.
953 OBJFILE is where the symbols are to be read from.
955 ADDRS is the list of section load addresses. If the user has given
956 an 'add-symbol-file' command, then this is the list of offsets and
957 addresses he or she provided as arguments to the command; or, if
958 we're handling a shared library, these are the actual addresses the
959 sections are loaded at, according to the inferior's dynamic linker
960 (as gleaned by GDB's shared library code). We convert each address
961 into an offset from the section VMA's as it appears in the object
962 file, and then call the file's sym_offsets function to convert this
963 into a format-specific offset table --- a `struct section_offsets'.
965 ADD_FLAGS encodes verbosity level, whether this is main symbol or
966 an extra symbol file such as dynamically loaded code, and wether
967 breakpoint reset should be deferred. */
970 syms_from_objfile_1 (struct objfile
*objfile
,
971 struct section_addr_info
*addrs
,
972 symfile_add_flags add_flags
)
974 struct section_addr_info
*local_addr
= NULL
;
975 struct cleanup
*old_chain
;
976 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
978 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
980 if (objfile
->sf
== NULL
)
982 /* No symbols to load, but we still need to make sure
983 that the section_offsets table is allocated. */
984 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
985 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
987 objfile
->num_sections
= num_sections
;
988 objfile
->section_offsets
989 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
991 memset (objfile
->section_offsets
, 0, size
);
995 /* Make sure that partially constructed symbol tables will be cleaned up
996 if an error occurs during symbol reading. */
997 old_chain
= make_cleanup (null_cleanup
, NULL
);
998 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
1000 /* If ADDRS is NULL, put together a dummy address list.
1001 We now establish the convention that an addr of zero means
1002 no load address was specified. */
1005 local_addr
= alloc_section_addr_info (1);
1006 make_cleanup (xfree
, local_addr
);
1012 /* We will modify the main symbol table, make sure that all its users
1013 will be cleaned up if an error occurs during symbol reading. */
1014 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1016 /* Since no error yet, throw away the old symbol table. */
1018 if (symfile_objfile
!= NULL
)
1020 delete symfile_objfile
;
1021 gdb_assert (symfile_objfile
== NULL
);
1024 /* Currently we keep symbols from the add-symbol-file command.
1025 If the user wants to get rid of them, they should do "symbol-file"
1026 without arguments first. Not sure this is the best behavior
1029 (*objfile
->sf
->sym_new_init
) (objfile
);
1032 /* Convert addr into an offset rather than an absolute address.
1033 We find the lowest address of a loaded segment in the objfile,
1034 and assume that <addr> is where that got loaded.
1036 We no longer warn if the lowest section is not a text segment (as
1037 happens for the PA64 port. */
1038 if (addrs
->num_sections
> 0)
1039 addr_info_make_relative (addrs
, objfile
->obfd
);
1041 /* Initialize symbol reading routines for this objfile, allow complaints to
1042 appear for this new file, and record how verbose to be, then do the
1043 initial symbol reading for this file. */
1045 (*objfile
->sf
->sym_init
) (objfile
);
1046 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
1048 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
1050 read_symbols (objfile
, add_flags
);
1052 /* Discard cleanups as symbol reading was successful. */
1054 objfile_holder
.release ();
1055 discard_cleanups (old_chain
);
1059 /* Same as syms_from_objfile_1, but also initializes the objfile
1060 entry-point info. */
1063 syms_from_objfile (struct objfile
*objfile
,
1064 struct section_addr_info
*addrs
,
1065 symfile_add_flags add_flags
)
1067 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1068 init_entry_point_info (objfile
);
1071 /* Perform required actions after either reading in the initial
1072 symbols for a new objfile, or mapping in the symbols from a reusable
1073 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1076 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1078 /* If this is the main symbol file we have to clean up all users of the
1079 old main symbol file. Otherwise it is sufficient to fixup all the
1080 breakpoints that may have been redefined by this symbol file. */
1081 if (add_flags
& SYMFILE_MAINLINE
)
1083 /* OK, make it the "real" symbol file. */
1084 symfile_objfile
= objfile
;
1086 clear_symtab_users (add_flags
);
1088 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1090 breakpoint_re_set ();
1093 /* We're done reading the symbol file; finish off complaints. */
1094 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
1097 /* Process a symbol file, as either the main file or as a dynamically
1100 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1101 A new reference is acquired by this function.
1103 For NAME description see the objfile constructor.
1105 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1106 extra, such as dynamically loaded code, and what to do with breakpoins.
1108 ADDRS is as described for syms_from_objfile_1, above.
1109 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1111 PARENT is the original objfile if ABFD is a separate debug info file.
1112 Otherwise PARENT is NULL.
1114 Upon success, returns a pointer to the objfile that was added.
1115 Upon failure, jumps back to command level (never returns). */
1117 static struct objfile
*
1118 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1119 symfile_add_flags add_flags
,
1120 struct section_addr_info
*addrs
,
1121 objfile_flags flags
, struct objfile
*parent
)
1123 struct objfile
*objfile
;
1124 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1125 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1126 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1127 && (readnow_symbol_files
1128 || (add_flags
& SYMFILE_NO_READ
) == 0));
1130 if (readnow_symbol_files
)
1132 flags
|= OBJF_READNOW
;
1133 add_flags
&= ~SYMFILE_NO_READ
;
1135 else if (readnever_symbol_files
1136 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1138 flags
|= OBJF_READNEVER
;
1139 add_flags
|= SYMFILE_NO_READ
;
1142 /* Give user a chance to burp if we'd be
1143 interactively wiping out any existing symbols. */
1145 if ((have_full_symbols () || have_partial_symbols ())
1148 && !query (_("Load new symbol table from \"%s\"? "), name
))
1149 error (_("Not confirmed."));
1152 flags
|= OBJF_MAINLINE
;
1153 objfile
= new struct objfile (abfd
, name
, flags
);
1156 add_separate_debug_objfile (objfile
, parent
);
1158 /* We either created a new mapped symbol table, mapped an existing
1159 symbol table file which has not had initial symbol reading
1160 performed, or need to read an unmapped symbol table. */
1163 if (deprecated_pre_add_symbol_hook
)
1164 deprecated_pre_add_symbol_hook (name
);
1167 printf_unfiltered (_("Reading symbols from %s..."), name
);
1169 gdb_flush (gdb_stdout
);
1172 syms_from_objfile (objfile
, addrs
, add_flags
);
1174 /* We now have at least a partial symbol table. Check to see if the
1175 user requested that all symbols be read on initial access via either
1176 the gdb startup command line or on a per symbol file basis. Expand
1177 all partial symbol tables for this objfile if so. */
1179 if ((flags
& OBJF_READNOW
))
1183 printf_unfiltered (_("expanding to full symbols..."));
1185 gdb_flush (gdb_stdout
);
1189 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1192 if (should_print
&& !objfile_has_symbols (objfile
))
1195 printf_unfiltered (_("(no debugging symbols found)..."));
1201 if (deprecated_post_add_symbol_hook
)
1202 deprecated_post_add_symbol_hook ();
1204 printf_unfiltered (_("done.\n"));
1207 /* We print some messages regardless of whether 'from_tty ||
1208 info_verbose' is true, so make sure they go out at the right
1210 gdb_flush (gdb_stdout
);
1212 if (objfile
->sf
== NULL
)
1214 observer_notify_new_objfile (objfile
);
1215 return objfile
; /* No symbols. */
1218 finish_new_objfile (objfile
, add_flags
);
1220 observer_notify_new_objfile (objfile
);
1222 bfd_cache_close_all ();
1226 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1227 see the objfile constructor. */
1230 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1231 symfile_add_flags symfile_flags
,
1232 struct objfile
*objfile
)
1234 struct section_addr_info
*sap
;
1235 struct cleanup
*my_cleanup
;
1237 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1238 because sections of BFD may not match sections of OBJFILE and because
1239 vma may have been modified by tools such as prelink. */
1240 sap
= build_section_addr_info_from_objfile (objfile
);
1241 my_cleanup
= make_cleanup_free_section_addr_info (sap
);
1243 symbol_file_add_with_addrs
1244 (bfd
, name
, symfile_flags
, sap
,
1245 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1249 do_cleanups (my_cleanup
);
1252 /* Process the symbol file ABFD, as either the main file or as a
1253 dynamically loaded file.
1254 See symbol_file_add_with_addrs's comments for details. */
1257 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1258 symfile_add_flags add_flags
,
1259 struct section_addr_info
*addrs
,
1260 objfile_flags flags
, struct objfile
*parent
)
1262 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1266 /* Process a symbol file, as either the main file or as a dynamically
1267 loaded file. See symbol_file_add_with_addrs's comments for details. */
1270 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1271 struct section_addr_info
*addrs
, objfile_flags flags
)
1273 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1275 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1279 /* Call symbol_file_add() with default values and update whatever is
1280 affected by the loading of a new main().
1281 Used when the file is supplied in the gdb command line
1282 and by some targets with special loading requirements.
1283 The auxiliary function, symbol_file_add_main_1(), has the flags
1284 argument for the switches that can only be specified in the symbol_file
1288 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1290 symbol_file_add_main_1 (args
, add_flags
, 0);
1294 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1295 objfile_flags flags
)
1297 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1299 symbol_file_add (args
, add_flags
, NULL
, flags
);
1301 /* Getting new symbols may change our opinion about
1302 what is frameless. */
1303 reinit_frame_cache ();
1305 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1306 set_initial_language ();
1310 symbol_file_clear (int from_tty
)
1312 if ((have_full_symbols () || have_partial_symbols ())
1315 ? !query (_("Discard symbol table from `%s'? "),
1316 objfile_name (symfile_objfile
))
1317 : !query (_("Discard symbol table? "))))
1318 error (_("Not confirmed."));
1320 /* solib descriptors may have handles to objfiles. Wipe them before their
1321 objfiles get stale by free_all_objfiles. */
1322 no_shared_libraries (NULL
, from_tty
);
1324 free_all_objfiles ();
1326 gdb_assert (symfile_objfile
== NULL
);
1328 printf_unfiltered (_("No symbol file now.\n"));
1331 /* See symfile.h. */
1333 int separate_debug_file_debug
= 0;
1336 separate_debug_file_exists (const char *name
, unsigned long crc
,
1337 struct objfile
*parent_objfile
)
1339 unsigned long file_crc
;
1341 struct stat parent_stat
, abfd_stat
;
1342 int verified_as_different
;
1344 /* Find a separate debug info file as if symbols would be present in
1345 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1346 section can contain just the basename of PARENT_OBJFILE without any
1347 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1348 the separate debug infos with the same basename can exist. */
1350 if (filename_cmp (name
, objfile_name (parent_objfile
)) == 0)
1353 if (separate_debug_file_debug
)
1354 printf_unfiltered (_(" Trying %s\n"), name
);
1356 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
, gnutarget
, -1));
1361 /* Verify symlinks were not the cause of filename_cmp name difference above.
1363 Some operating systems, e.g. Windows, do not provide a meaningful
1364 st_ino; they always set it to zero. (Windows does provide a
1365 meaningful st_dev.) Files accessed from gdbservers that do not
1366 support the vFile:fstat packet will also have st_ino set to zero.
1367 Do not indicate a duplicate library in either case. While there
1368 is no guarantee that a system that provides meaningful inode
1369 numbers will never set st_ino to zero, this is merely an
1370 optimization, so we do not need to worry about false negatives. */
1372 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1373 && abfd_stat
.st_ino
!= 0
1374 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1376 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1377 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1379 verified_as_different
= 1;
1382 verified_as_different
= 0;
1384 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1389 if (crc
!= file_crc
)
1391 unsigned long parent_crc
;
1393 /* If the files could not be verified as different with
1394 bfd_stat then we need to calculate the parent's CRC
1395 to verify whether the files are different or not. */
1397 if (!verified_as_different
)
1399 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1403 if (verified_as_different
|| parent_crc
!= file_crc
)
1404 warning (_("the debug information found in \"%s\""
1405 " does not match \"%s\" (CRC mismatch).\n"),
1406 name
, objfile_name (parent_objfile
));
1414 char *debug_file_directory
= NULL
;
1416 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1417 struct cmd_list_element
*c
, const char *value
)
1419 fprintf_filtered (file
,
1420 _("The directory where separate debug "
1421 "symbols are searched for is \"%s\".\n"),
1425 #if ! defined (DEBUG_SUBDIRECTORY)
1426 #define DEBUG_SUBDIRECTORY ".debug"
1429 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1430 where the original file resides (may not be the same as
1431 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1432 looking for. CANON_DIR is the "realpath" form of DIR.
1433 DIR must contain a trailing '/'.
1434 Returns the path of the file with separate debug info, of NULL. */
1437 find_separate_debug_file (const char *dir
,
1438 const char *canon_dir
,
1439 const char *debuglink
,
1440 unsigned long crc32
, struct objfile
*objfile
)
1445 VEC (char_ptr
) *debugdir_vec
;
1446 struct cleanup
*back_to
;
1449 if (separate_debug_file_debug
)
1450 printf_unfiltered (_("\nLooking for separate debug info (debug link) for "
1451 "%s\n"), objfile_name (objfile
));
1453 /* Set I to std::max (strlen (canon_dir), strlen (dir)). */
1455 if (canon_dir
!= NULL
&& strlen (canon_dir
) > i
)
1456 i
= strlen (canon_dir
);
1459 = (char *) xmalloc (strlen (debug_file_directory
) + 1
1461 + strlen (DEBUG_SUBDIRECTORY
)
1463 + strlen (debuglink
)
1466 /* First try in the same directory as the original file. */
1467 strcpy (debugfile
, dir
);
1468 strcat (debugfile
, debuglink
);
1470 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1473 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1474 strcpy (debugfile
, dir
);
1475 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1476 strcat (debugfile
, "/");
1477 strcat (debugfile
, debuglink
);
1479 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1482 /* Then try in the global debugfile directories.
1484 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1485 cause "/..." lookups. */
1487 debugdir_vec
= dirnames_to_char_ptr_vec (debug_file_directory
);
1488 back_to
= make_cleanup_free_char_ptr_vec (debugdir_vec
);
1490 for (ix
= 0; VEC_iterate (char_ptr
, debugdir_vec
, ix
, debugdir
); ++ix
)
1492 strcpy (debugfile
, debugdir
);
1493 strcat (debugfile
, "/");
1494 strcat (debugfile
, dir
);
1495 strcat (debugfile
, debuglink
);
1497 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1499 do_cleanups (back_to
);
1503 /* If the file is in the sysroot, try using its base path in the
1504 global debugfile directory. */
1505 if (canon_dir
!= NULL
1506 && filename_ncmp (canon_dir
, gdb_sysroot
,
1507 strlen (gdb_sysroot
)) == 0
1508 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1510 strcpy (debugfile
, debugdir
);
1511 strcat (debugfile
, canon_dir
+ strlen (gdb_sysroot
));
1512 strcat (debugfile
, "/");
1513 strcat (debugfile
, debuglink
);
1515 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1517 do_cleanups (back_to
);
1523 do_cleanups (back_to
);
1528 /* Modify PATH to contain only "[/]directory/" part of PATH.
1529 If there were no directory separators in PATH, PATH will be empty
1530 string on return. */
1533 terminate_after_last_dir_separator (char *path
)
1537 /* Strip off the final filename part, leaving the directory name,
1538 followed by a slash. The directory can be relative or absolute. */
1539 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1540 if (IS_DIR_SEPARATOR (path
[i
]))
1543 /* If I is -1 then no directory is present there and DIR will be "". */
1547 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1548 Returns pathname, or NULL. */
1551 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1554 unsigned long crc32
;
1556 gdb::unique_xmalloc_ptr
<char> debuglink
1557 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1559 if (debuglink
== NULL
)
1561 /* There's no separate debug info, hence there's no way we could
1562 load it => no warning. */
1566 std::string dir
= objfile_name (objfile
);
1567 terminate_after_last_dir_separator (&dir
[0]);
1568 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1570 debugfile
= find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1571 debuglink
.get (), crc32
, objfile
);
1573 if (debugfile
== NULL
)
1575 /* For PR gdb/9538, try again with realpath (if different from the
1580 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1581 && S_ISLNK (st_buf
.st_mode
))
1583 gdb::unique_xmalloc_ptr
<char> symlink_dir
1584 (lrealpath (objfile_name (objfile
)));
1585 if (symlink_dir
!= NULL
)
1587 terminate_after_last_dir_separator (symlink_dir
.get ());
1588 if (dir
!= symlink_dir
.get ())
1590 /* Different directory, so try using it. */
1591 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1604 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1608 validate_readnow_readnever (objfile_flags flags
)
1610 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1611 error (_("-readnow and -readnever cannot be used simultaneously"));
1614 /* This is the symbol-file command. Read the file, analyze its
1615 symbols, and add a struct symtab to a symtab list. The syntax of
1616 the command is rather bizarre:
1618 1. The function buildargv implements various quoting conventions
1619 which are undocumented and have little or nothing in common with
1620 the way things are quoted (or not quoted) elsewhere in GDB.
1622 2. Options are used, which are not generally used in GDB (perhaps
1623 "set mapped on", "set readnow on" would be better)
1625 3. The order of options matters, which is contrary to GNU
1626 conventions (because it is confusing and inconvenient). */
1629 symbol_file_command (const char *args
, int from_tty
)
1635 symbol_file_clear (from_tty
);
1639 objfile_flags flags
= OBJF_USERLOADED
;
1640 symfile_add_flags add_flags
= 0;
1642 bool stop_processing_options
= false;
1647 add_flags
|= SYMFILE_VERBOSE
;
1649 gdb_argv
built_argv (args
);
1650 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1652 if (stop_processing_options
|| *arg
!= '-')
1657 error (_("Unrecognized argument \"%s\""), arg
);
1659 else if (strcmp (arg
, "-readnow") == 0)
1660 flags
|= OBJF_READNOW
;
1661 else if (strcmp (arg
, "-readnever") == 0)
1662 flags
|= OBJF_READNEVER
;
1663 else if (strcmp (arg
, "--") == 0)
1664 stop_processing_options
= true;
1666 error (_("Unrecognized argument \"%s\""), arg
);
1670 error (_("no symbol file name was specified"));
1672 validate_readnow_readnever (flags
);
1674 symbol_file_add_main_1 (name
, add_flags
, flags
);
1678 /* Set the initial language.
1680 FIXME: A better solution would be to record the language in the
1681 psymtab when reading partial symbols, and then use it (if known) to
1682 set the language. This would be a win for formats that encode the
1683 language in an easily discoverable place, such as DWARF. For
1684 stabs, we can jump through hoops looking for specially named
1685 symbols or try to intuit the language from the specific type of
1686 stabs we find, but we can't do that until later when we read in
1690 set_initial_language (void)
1692 enum language lang
= main_language ();
1694 if (lang
== language_unknown
)
1696 char *name
= main_name ();
1697 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1700 lang
= SYMBOL_LANGUAGE (sym
);
1703 if (lang
== language_unknown
)
1705 /* Make C the default language */
1709 set_language (lang
);
1710 expected_language
= current_language
; /* Don't warn the user. */
1713 /* Open the file specified by NAME and hand it off to BFD for
1714 preliminary analysis. Return a newly initialized bfd *, which
1715 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1716 absolute). In case of trouble, error() is called. */
1719 symfile_bfd_open (const char *name
)
1722 struct cleanup
*back_to
= make_cleanup (null_cleanup
, 0);
1724 if (!is_target_filename (name
))
1726 char *absolute_name
;
1728 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1730 /* Look down path for it, allocate 2nd new malloc'd copy. */
1731 desc
= openp (getenv ("PATH"),
1732 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1733 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1734 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1737 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1739 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1740 desc
= openp (getenv ("PATH"),
1741 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1742 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1746 perror_with_name (expanded_name
.get ());
1748 make_cleanup (xfree
, absolute_name
);
1749 name
= absolute_name
;
1752 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1753 if (sym_bfd
== NULL
)
1754 error (_("`%s': can't open to read symbols: %s."), name
,
1755 bfd_errmsg (bfd_get_error ()));
1757 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1758 bfd_set_cacheable (sym_bfd
.get (), 1);
1760 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1761 error (_("`%s': can't read symbols: %s."), name
,
1762 bfd_errmsg (bfd_get_error ()));
1764 do_cleanups (back_to
);
1769 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1770 the section was not found. */
1773 get_section_index (struct objfile
*objfile
, const char *section_name
)
1775 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1783 /* Link SF into the global symtab_fns list.
1784 FLAVOUR is the file format that SF handles.
1785 Called on startup by the _initialize routine in each object file format
1786 reader, to register information about each format the reader is prepared
1790 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1792 symtab_fns
.emplace_back (flavour
, sf
);
1795 /* Initialize OBJFILE to read symbols from its associated BFD. It
1796 either returns or calls error(). The result is an initialized
1797 struct sym_fns in the objfile structure, that contains cached
1798 information about the symbol file. */
1800 static const struct sym_fns
*
1801 find_sym_fns (bfd
*abfd
)
1803 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1805 if (our_flavour
== bfd_target_srec_flavour
1806 || our_flavour
== bfd_target_ihex_flavour
1807 || our_flavour
== bfd_target_tekhex_flavour
)
1808 return NULL
; /* No symbols. */
1810 for (const registered_sym_fns
&rsf
: symtab_fns
)
1811 if (our_flavour
== rsf
.sym_flavour
)
1814 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1815 bfd_get_target (abfd
));
1819 /* This function runs the load command of our current target. */
1822 load_command (const char *arg
, int from_tty
)
1824 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1828 /* The user might be reloading because the binary has changed. Take
1829 this opportunity to check. */
1830 reopen_exec_file ();
1838 parg
= arg
= get_exec_file (1);
1840 /* Count how many \ " ' tab space there are in the name. */
1841 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1849 /* We need to quote this string so buildargv can pull it apart. */
1850 char *temp
= (char *) xmalloc (strlen (arg
) + count
+ 1 );
1854 make_cleanup (xfree
, temp
);
1857 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1859 strncpy (ptemp
, prev
, parg
- prev
);
1860 ptemp
+= parg
- prev
;
1864 strcpy (ptemp
, prev
);
1870 target_load (arg
, from_tty
);
1872 /* After re-loading the executable, we don't really know which
1873 overlays are mapped any more. */
1874 overlay_cache_invalid
= 1;
1876 do_cleanups (cleanup
);
1879 /* This version of "load" should be usable for any target. Currently
1880 it is just used for remote targets, not inftarg.c or core files,
1881 on the theory that only in that case is it useful.
1883 Avoiding xmodem and the like seems like a win (a) because we don't have
1884 to worry about finding it, and (b) On VMS, fork() is very slow and so
1885 we don't want to run a subprocess. On the other hand, I'm not sure how
1886 performance compares. */
1888 static int validate_download
= 0;
1890 /* Callback service function for generic_load (bfd_map_over_sections). */
1893 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1895 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1897 *sum
+= bfd_get_section_size (asec
);
1900 /* Opaque data for load_section_callback. */
1901 struct load_section_data
{
1902 CORE_ADDR load_offset
;
1903 struct load_progress_data
*progress_data
;
1904 VEC(memory_write_request_s
) *requests
;
1907 /* Opaque data for load_progress. */
1908 struct load_progress_data
{
1909 /* Cumulative data. */
1910 unsigned long write_count
;
1911 unsigned long data_count
;
1912 bfd_size_type total_size
;
1915 /* Opaque data for load_progress for a single section. */
1916 struct load_progress_section_data
{
1917 struct load_progress_data
*cumulative
;
1919 /* Per-section data. */
1920 const char *section_name
;
1921 ULONGEST section_sent
;
1922 ULONGEST section_size
;
1927 /* Target write callback routine for progress reporting. */
1930 load_progress (ULONGEST bytes
, void *untyped_arg
)
1932 struct load_progress_section_data
*args
1933 = (struct load_progress_section_data
*) untyped_arg
;
1934 struct load_progress_data
*totals
;
1937 /* Writing padding data. No easy way to get at the cumulative
1938 stats, so just ignore this. */
1941 totals
= args
->cumulative
;
1943 if (bytes
== 0 && args
->section_sent
== 0)
1945 /* The write is just starting. Let the user know we've started
1947 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1949 hex_string (args
->section_size
),
1950 paddress (target_gdbarch (), args
->lma
));
1954 if (validate_download
)
1956 /* Broken memories and broken monitors manifest themselves here
1957 when bring new computers to life. This doubles already slow
1959 /* NOTE: cagney/1999-10-18: A more efficient implementation
1960 might add a verify_memory() method to the target vector and
1961 then use that. remote.c could implement that method using
1962 the ``qCRC'' packet. */
1963 gdb::byte_vector
check (bytes
);
1965 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1966 error (_("Download verify read failed at %s"),
1967 paddress (target_gdbarch (), args
->lma
));
1968 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1969 error (_("Download verify compare failed at %s"),
1970 paddress (target_gdbarch (), args
->lma
));
1972 totals
->data_count
+= bytes
;
1974 args
->buffer
+= bytes
;
1975 totals
->write_count
+= 1;
1976 args
->section_sent
+= bytes
;
1977 if (check_quit_flag ()
1978 || (deprecated_ui_load_progress_hook
!= NULL
1979 && deprecated_ui_load_progress_hook (args
->section_name
,
1980 args
->section_sent
)))
1981 error (_("Canceled the download"));
1983 if (deprecated_show_load_progress
!= NULL
)
1984 deprecated_show_load_progress (args
->section_name
,
1988 totals
->total_size
);
1991 /* Callback service function for generic_load (bfd_map_over_sections). */
1994 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1996 struct memory_write_request
*new_request
;
1997 struct load_section_data
*args
= (struct load_section_data
*) data
;
1998 struct load_progress_section_data
*section_data
;
1999 bfd_size_type size
= bfd_get_section_size (asec
);
2001 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
2003 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
2009 new_request
= VEC_safe_push (memory_write_request_s
,
2010 args
->requests
, NULL
);
2011 memset (new_request
, 0, sizeof (struct memory_write_request
));
2012 section_data
= XCNEW (struct load_progress_section_data
);
2013 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
2014 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size
2016 new_request
->data
= (gdb_byte
*) xmalloc (size
);
2017 new_request
->baton
= section_data
;
2019 buffer
= new_request
->data
;
2021 section_data
->cumulative
= args
->progress_data
;
2022 section_data
->section_name
= sect_name
;
2023 section_data
->section_size
= size
;
2024 section_data
->lma
= new_request
->begin
;
2025 section_data
->buffer
= buffer
;
2027 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
2030 /* Clean up an entire memory request vector, including load
2031 data and progress records. */
2034 clear_memory_write_data (void *arg
)
2036 VEC(memory_write_request_s
) **vec_p
= (VEC(memory_write_request_s
) **) arg
;
2037 VEC(memory_write_request_s
) *vec
= *vec_p
;
2039 struct memory_write_request
*mr
;
2041 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
2046 VEC_free (memory_write_request_s
, vec
);
2049 static void print_transfer_performance (struct ui_file
*stream
,
2050 unsigned long data_count
,
2051 unsigned long write_count
,
2052 std::chrono::steady_clock::duration d
);
2055 generic_load (const char *args
, int from_tty
)
2057 struct cleanup
*old_cleanups
;
2058 struct load_section_data cbdata
;
2059 struct load_progress_data total_progress
;
2060 struct ui_out
*uiout
= current_uiout
;
2064 memset (&cbdata
, 0, sizeof (cbdata
));
2065 memset (&total_progress
, 0, sizeof (total_progress
));
2066 cbdata
.progress_data
= &total_progress
;
2068 old_cleanups
= make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
2071 error_no_arg (_("file to load"));
2073 gdb_argv
argv (args
);
2075 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2077 if (argv
[1] != NULL
)
2081 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2083 /* If the last word was not a valid number then
2084 treat it as a file name with spaces in. */
2085 if (argv
[1] == endptr
)
2086 error (_("Invalid download offset:%s."), argv
[1]);
2088 if (argv
[2] != NULL
)
2089 error (_("Too many parameters."));
2092 /* Open the file for loading. */
2093 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2094 if (loadfile_bfd
== NULL
)
2095 perror_with_name (filename
.get ());
2097 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2099 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2100 bfd_errmsg (bfd_get_error ()));
2103 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2104 (void *) &total_progress
.total_size
);
2106 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2108 using namespace std::chrono
;
2110 steady_clock::time_point start_time
= steady_clock::now ();
2112 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2113 load_progress
) != 0)
2114 error (_("Load failed"));
2116 steady_clock::time_point end_time
= steady_clock::now ();
2118 entry
= bfd_get_start_address (loadfile_bfd
.get ());
2119 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2120 uiout
->text ("Start address ");
2121 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2122 uiout
->text (", load size ");
2123 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2125 regcache_write_pc (get_current_regcache (), entry
);
2127 /* Reset breakpoints, now that we have changed the load image. For
2128 instance, breakpoints may have been set (or reset, by
2129 post_create_inferior) while connected to the target but before we
2130 loaded the program. In that case, the prologue analyzer could
2131 have read instructions from the target to find the right
2132 breakpoint locations. Loading has changed the contents of that
2135 breakpoint_re_set ();
2137 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2138 total_progress
.write_count
,
2139 end_time
- start_time
);
2141 do_cleanups (old_cleanups
);
2144 /* Report on STREAM the performance of a memory transfer operation,
2145 such as 'load'. DATA_COUNT is the number of bytes transferred.
2146 WRITE_COUNT is the number of separate write operations, or 0, if
2147 that information is not available. TIME is how long the operation
2151 print_transfer_performance (struct ui_file
*stream
,
2152 unsigned long data_count
,
2153 unsigned long write_count
,
2154 std::chrono::steady_clock::duration time
)
2156 using namespace std::chrono
;
2157 struct ui_out
*uiout
= current_uiout
;
2159 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2161 uiout
->text ("Transfer rate: ");
2162 if (ms
.count () > 0)
2164 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2166 if (uiout
->is_mi_like_p ())
2168 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2169 uiout
->text (" bits/sec");
2171 else if (rate
< 1024)
2173 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2174 uiout
->text (" bytes/sec");
2178 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2179 uiout
->text (" KB/sec");
2184 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2185 uiout
->text (" bits in <1 sec");
2187 if (write_count
> 0)
2190 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2191 uiout
->text (" bytes/write");
2193 uiout
->text (".\n");
2196 /* This function allows the addition of incrementally linked object files.
2197 It does not modify any state in the target, only in the debugger. */
2198 /* Note: ezannoni 2000-04-13 This function/command used to have a
2199 special case syntax for the rombug target (Rombug is the boot
2200 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2201 rombug case, the user doesn't need to supply a text address,
2202 instead a call to target_link() (in target.c) would supply the
2203 value to use. We are now discontinuing this type of ad hoc syntax. */
2206 add_symbol_file_command (const char *args
, int from_tty
)
2208 struct gdbarch
*gdbarch
= get_current_arch ();
2209 gdb::unique_xmalloc_ptr
<char> filename
;
2213 struct objfile
*objf
;
2214 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2215 symfile_add_flags add_flags
= 0;
2218 add_flags
|= SYMFILE_VERBOSE
;
2226 struct section_addr_info
*section_addrs
;
2227 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2228 bool stop_processing_options
= false;
2229 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2234 error (_("add-symbol-file takes a file name and an address"));
2236 bool seen_addr
= false;
2237 gdb_argv
argv (args
);
2239 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2241 if (stop_processing_options
|| *arg
!= '-')
2243 if (filename
== NULL
)
2245 /* First non-option argument is always the filename. */
2246 filename
.reset (tilde_expand (arg
));
2248 else if (!seen_addr
)
2250 /* The second non-option argument is always the text
2251 address at which to load the program. */
2252 sect_opts
[0].value
= arg
;
2256 error (_("Unrecognized argument \"%s\""), arg
);
2258 else if (strcmp (arg
, "-readnow") == 0)
2259 flags
|= OBJF_READNOW
;
2260 else if (strcmp (arg
, "-readnever") == 0)
2261 flags
|= OBJF_READNEVER
;
2262 else if (strcmp (arg
, "-s") == 0)
2264 if (argv
[argcnt
+ 1] == NULL
)
2265 error (_("Missing section name after \"-s\""));
2266 else if (argv
[argcnt
+ 2] == NULL
)
2267 error (_("Missing section address after \"-s\""));
2269 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2271 sect_opts
.push_back (sect
);
2274 else if (strcmp (arg
, "--") == 0)
2275 stop_processing_options
= true;
2277 error (_("Unrecognized argument \"%s\""), arg
);
2280 if (filename
== NULL
)
2281 error (_("You must provide a filename to be loaded."));
2283 validate_readnow_readnever (flags
);
2285 /* This command takes at least two arguments. The first one is a
2286 filename, and the second is the address where this file has been
2287 loaded. Abort now if this address hasn't been provided by the
2290 error (_("The address where %s has been loaded is missing"),
2293 /* Print the prompt for the query below. And save the arguments into
2294 a sect_addr_info structure to be passed around to other
2295 functions. We have to split this up into separate print
2296 statements because hex_string returns a local static
2299 printf_unfiltered (_("add symbol table from file \"%s\" at\n"),
2301 section_addrs
= alloc_section_addr_info (sect_opts
.size ());
2302 make_cleanup (xfree
, section_addrs
);
2303 for (sect_opt
§
: sect_opts
)
2306 const char *val
= sect
.value
;
2307 const char *sec
= sect
.name
;
2309 addr
= parse_and_eval_address (val
);
2311 /* Here we store the section offsets in the order they were
2312 entered on the command line. */
2313 section_addrs
->other
[sec_num
].name
= (char *) sec
;
2314 section_addrs
->other
[sec_num
].addr
= addr
;
2315 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2316 paddress (gdbarch
, addr
));
2319 /* The object's sections are initialized when a
2320 call is made to build_objfile_section_table (objfile).
2321 This happens in reread_symbols.
2322 At this point, we don't know what file type this is,
2323 so we can't determine what section names are valid. */
2325 section_addrs
->num_sections
= sec_num
;
2327 if (from_tty
&& (!query ("%s", "")))
2328 error (_("Not confirmed."));
2330 objf
= symbol_file_add (filename
.get (), add_flags
, section_addrs
, flags
);
2332 add_target_sections_of_objfile (objf
);
2334 /* Getting new symbols may change our opinion about what is
2336 reinit_frame_cache ();
2337 do_cleanups (my_cleanups
);
2341 /* This function removes a symbol file that was added via add-symbol-file. */
2344 remove_symbol_file_command (const char *args
, int from_tty
)
2346 struct objfile
*objf
= NULL
;
2347 struct program_space
*pspace
= current_program_space
;
2352 error (_("remove-symbol-file: no symbol file provided"));
2354 gdb_argv
argv (args
);
2356 if (strcmp (argv
[0], "-a") == 0)
2358 /* Interpret the next argument as an address. */
2361 if (argv
[1] == NULL
)
2362 error (_("Missing address argument"));
2364 if (argv
[2] != NULL
)
2365 error (_("Junk after %s"), argv
[1]);
2367 addr
= parse_and_eval_address (argv
[1]);
2371 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2372 && (objf
->flags
& OBJF_SHARED
) != 0
2373 && objf
->pspace
== pspace
&& is_addr_in_objfile (addr
, objf
))
2377 else if (argv
[0] != NULL
)
2379 /* Interpret the current argument as a file name. */
2381 if (argv
[1] != NULL
)
2382 error (_("Junk after %s"), argv
[0]);
2384 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2388 if ((objf
->flags
& OBJF_USERLOADED
) != 0
2389 && (objf
->flags
& OBJF_SHARED
) != 0
2390 && objf
->pspace
== pspace
2391 && filename_cmp (filename
.get (), objfile_name (objf
)) == 0)
2397 error (_("No symbol file found"));
2400 && !query (_("Remove symbol table from file \"%s\"? "),
2401 objfile_name (objf
)))
2402 error (_("Not confirmed."));
2405 clear_symtab_users (0);
2408 /* Re-read symbols if a symbol-file has changed. */
2411 reread_symbols (void)
2413 struct objfile
*objfile
;
2415 struct stat new_statbuf
;
2417 std::vector
<struct objfile
*> new_objfiles
;
2419 /* With the addition of shared libraries, this should be modified,
2420 the load time should be saved in the partial symbol tables, since
2421 different tables may come from different source files. FIXME.
2422 This routine should then walk down each partial symbol table
2423 and see if the symbol table that it originates from has been changed. */
2425 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2427 if (objfile
->obfd
== NULL
)
2430 /* Separate debug objfiles are handled in the main objfile. */
2431 if (objfile
->separate_debug_objfile_backlink
)
2434 /* If this object is from an archive (what you usually create with
2435 `ar', often called a `static library' on most systems, though
2436 a `shared library' on AIX is also an archive), then you should
2437 stat on the archive name, not member name. */
2438 if (objfile
->obfd
->my_archive
)
2439 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2441 res
= stat (objfile_name (objfile
), &new_statbuf
);
2444 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2445 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2446 objfile_name (objfile
));
2449 new_modtime
= new_statbuf
.st_mtime
;
2450 if (new_modtime
!= objfile
->mtime
)
2452 struct cleanup
*old_cleanups
;
2453 struct section_offsets
*offsets
;
2455 char *original_name
;
2457 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2458 objfile_name (objfile
));
2460 /* There are various functions like symbol_file_add,
2461 symfile_bfd_open, syms_from_objfile, etc., which might
2462 appear to do what we want. But they have various other
2463 effects which we *don't* want. So we just do stuff
2464 ourselves. We don't worry about mapped files (for one thing,
2465 any mapped file will be out of date). */
2467 /* If we get an error, blow away this objfile (not sure if
2468 that is the correct response for things like shared
2470 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
2472 /* We need to do this whenever any symbols go away. */
2473 old_cleanups
= make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2475 if (exec_bfd
!= NULL
2476 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2477 bfd_get_filename (exec_bfd
)) == 0)
2479 /* Reload EXEC_BFD without asking anything. */
2481 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2484 /* Keep the calls order approx. the same as in free_objfile. */
2486 /* Free the separate debug objfiles. It will be
2487 automatically recreated by sym_read. */
2488 free_objfile_separate_debug (objfile
);
2490 /* Remove any references to this objfile in the global
2492 preserve_values (objfile
);
2494 /* Nuke all the state that we will re-read. Much of the following
2495 code which sets things to NULL really is necessary to tell
2496 other parts of GDB that there is nothing currently there.
2498 Try to keep the freeing order compatible with free_objfile. */
2500 if (objfile
->sf
!= NULL
)
2502 (*objfile
->sf
->sym_finish
) (objfile
);
2505 clear_objfile_data (objfile
);
2507 /* Clean up any state BFD has sitting around. */
2509 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2510 char *obfd_filename
;
2512 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2513 /* Open the new BFD before freeing the old one, so that
2514 the filename remains live. */
2515 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2516 objfile
->obfd
= temp
.release ();
2517 if (objfile
->obfd
== NULL
)
2518 error (_("Can't open %s to read symbols."), obfd_filename
);
2521 original_name
= xstrdup (objfile
->original_name
);
2522 make_cleanup (xfree
, original_name
);
2524 /* bfd_openr sets cacheable to true, which is what we want. */
2525 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2526 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2527 bfd_errmsg (bfd_get_error ()));
2529 /* Save the offsets, we will nuke them with the rest of the
2531 num_offsets
= objfile
->num_sections
;
2532 offsets
= ((struct section_offsets
*)
2533 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2534 memcpy (offsets
, objfile
->section_offsets
,
2535 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2537 /* FIXME: Do we have to free a whole linked list, or is this
2539 objfile
->global_psymbols
.clear ();
2540 objfile
->static_psymbols
.clear ();
2542 /* Free the obstacks for non-reusable objfiles. */
2543 psymbol_bcache_free (objfile
->psymbol_cache
);
2544 objfile
->psymbol_cache
= psymbol_bcache_init ();
2546 /* NB: after this call to obstack_free, objfiles_changed
2547 will need to be called (see discussion below). */
2548 obstack_free (&objfile
->objfile_obstack
, 0);
2549 objfile
->sections
= NULL
;
2550 objfile
->compunit_symtabs
= NULL
;
2551 objfile
->psymtabs
= NULL
;
2552 objfile
->psymtabs_addrmap
= NULL
;
2553 objfile
->free_psymtabs
= NULL
;
2554 objfile
->template_symbols
= NULL
;
2556 /* obstack_init also initializes the obstack so it is
2557 empty. We could use obstack_specify_allocation but
2558 gdb_obstack.h specifies the alloc/dealloc functions. */
2559 obstack_init (&objfile
->objfile_obstack
);
2561 /* set_objfile_per_bfd potentially allocates the per-bfd
2562 data on the objfile's obstack (if sharing data across
2563 multiple users is not possible), so it's important to
2564 do it *after* the obstack has been initialized. */
2565 set_objfile_per_bfd (objfile
);
2567 objfile
->original_name
2568 = (char *) obstack_copy0 (&objfile
->objfile_obstack
, original_name
,
2569 strlen (original_name
));
2571 /* Reset the sym_fns pointer. The ELF reader can change it
2572 based on whether .gdb_index is present, and we need it to
2573 start over. PR symtab/15885 */
2574 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2576 build_objfile_section_table (objfile
);
2577 terminate_minimal_symbol_table (objfile
);
2579 /* We use the same section offsets as from last time. I'm not
2580 sure whether that is always correct for shared libraries. */
2581 objfile
->section_offsets
= (struct section_offsets
*)
2582 obstack_alloc (&objfile
->objfile_obstack
,
2583 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2584 memcpy (objfile
->section_offsets
, offsets
,
2585 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2586 objfile
->num_sections
= num_offsets
;
2588 /* What the hell is sym_new_init for, anyway? The concept of
2589 distinguishing between the main file and additional files
2590 in this way seems rather dubious. */
2591 if (objfile
== symfile_objfile
)
2593 (*objfile
->sf
->sym_new_init
) (objfile
);
2596 (*objfile
->sf
->sym_init
) (objfile
);
2597 clear_complaints (&symfile_complaints
, 1, 1);
2599 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2601 /* We are about to read new symbols and potentially also
2602 DWARF information. Some targets may want to pass addresses
2603 read from DWARF DIE's through an adjustment function before
2604 saving them, like MIPS, which may call into
2605 "find_pc_section". When called, that function will make
2606 use of per-objfile program space data.
2608 Since we discarded our section information above, we have
2609 dangling pointers in the per-objfile program space data
2610 structure. Force GDB to update the section mapping
2611 information by letting it know the objfile has changed,
2612 making the dangling pointers point to correct data
2615 objfiles_changed ();
2617 read_symbols (objfile
, 0);
2619 if (!objfile_has_symbols (objfile
))
2622 printf_unfiltered (_("(no debugging symbols found)\n"));
2626 /* We're done reading the symbol file; finish off complaints. */
2627 clear_complaints (&symfile_complaints
, 0, 1);
2629 /* Getting new symbols may change our opinion about what is
2632 reinit_frame_cache ();
2634 /* Discard cleanups as symbol reading was successful. */
2635 objfile_holder
.release ();
2636 discard_cleanups (old_cleanups
);
2638 /* If the mtime has changed between the time we set new_modtime
2639 and now, we *want* this to be out of date, so don't call stat
2641 objfile
->mtime
= new_modtime
;
2642 init_entry_point_info (objfile
);
2644 new_objfiles
.push_back (objfile
);
2648 if (!new_objfiles
.empty ())
2650 clear_symtab_users (0);
2652 /* clear_objfile_data for each objfile was called before freeing it and
2653 observer_notify_new_objfile (NULL) has been called by
2654 clear_symtab_users above. Notify the new files now. */
2655 for (auto iter
: new_objfiles
)
2656 observer_notify_new_objfile (iter
);
2658 /* At least one objfile has changed, so we can consider that
2659 the executable we're debugging has changed too. */
2660 observer_notify_executable_changed ();
2665 struct filename_language
2667 filename_language (const std::string
&ext_
, enum language lang_
)
2668 : ext (ext_
), lang (lang_
)
2675 static std::vector
<filename_language
> filename_language_table
;
2677 /* See symfile.h. */
2680 add_filename_language (const char *ext
, enum language lang
)
2682 filename_language_table
.emplace_back (ext
, lang
);
2685 static char *ext_args
;
2687 show_ext_args (struct ui_file
*file
, int from_tty
,
2688 struct cmd_list_element
*c
, const char *value
)
2690 fprintf_filtered (file
,
2691 _("Mapping between filename extension "
2692 "and source language is \"%s\".\n"),
2697 set_ext_lang_command (const char *args
,
2698 int from_tty
, struct cmd_list_element
*e
)
2700 char *cp
= ext_args
;
2703 /* First arg is filename extension, starting with '.' */
2705 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2707 /* Find end of first arg. */
2708 while (*cp
&& !isspace (*cp
))
2712 error (_("'%s': two arguments required -- "
2713 "filename extension and language"),
2716 /* Null-terminate first arg. */
2719 /* Find beginning of second arg, which should be a source language. */
2720 cp
= skip_spaces (cp
);
2723 error (_("'%s': two arguments required -- "
2724 "filename extension and language"),
2727 /* Lookup the language from among those we know. */
2728 lang
= language_enum (cp
);
2730 auto it
= filename_language_table
.begin ();
2731 /* Now lookup the filename extension: do we already know it? */
2732 for (; it
!= filename_language_table
.end (); it
++)
2734 if (it
->ext
== ext_args
)
2738 if (it
== filename_language_table
.end ())
2740 /* New file extension. */
2741 add_filename_language (ext_args
, lang
);
2745 /* Redefining a previously known filename extension. */
2748 /* query ("Really make files of type %s '%s'?", */
2749 /* ext_args, language_str (lang)); */
2756 info_ext_lang_command (const char *args
, int from_tty
)
2758 printf_filtered (_("Filename extensions and the languages they represent:"));
2759 printf_filtered ("\n\n");
2760 for (const filename_language
&entry
: filename_language_table
)
2761 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2762 language_str (entry
.lang
));
2766 deduce_language_from_filename (const char *filename
)
2770 if (filename
!= NULL
)
2771 if ((cp
= strrchr (filename
, '.')) != NULL
)
2773 for (const filename_language
&entry
: filename_language_table
)
2774 if (entry
.ext
== cp
)
2778 return language_unknown
;
2781 /* Allocate and initialize a new symbol table.
2782 CUST is from the result of allocate_compunit_symtab. */
2785 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2787 struct objfile
*objfile
= cust
->objfile
;
2788 struct symtab
*symtab
2789 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2792 = (const char *) bcache (filename
, strlen (filename
) + 1,
2793 objfile
->per_bfd
->filename_cache
);
2794 symtab
->fullname
= NULL
;
2795 symtab
->language
= deduce_language_from_filename (filename
);
2797 /* This can be very verbose with lots of headers.
2798 Only print at higher debug levels. */
2799 if (symtab_create_debug
>= 2)
2801 /* Be a bit clever with debugging messages, and don't print objfile
2802 every time, only when it changes. */
2803 static char *last_objfile_name
= NULL
;
2805 if (last_objfile_name
== NULL
2806 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2808 xfree (last_objfile_name
);
2809 last_objfile_name
= xstrdup (objfile_name (objfile
));
2810 fprintf_unfiltered (gdb_stdlog
,
2811 "Creating one or more symtabs for objfile %s ...\n",
2814 fprintf_unfiltered (gdb_stdlog
,
2815 "Created symtab %s for module %s.\n",
2816 host_address_to_string (symtab
), filename
);
2819 /* Add it to CUST's list of symtabs. */
2820 if (cust
->filetabs
== NULL
)
2822 cust
->filetabs
= symtab
;
2823 cust
->last_filetab
= symtab
;
2827 cust
->last_filetab
->next
= symtab
;
2828 cust
->last_filetab
= symtab
;
2831 /* Backlink to the containing compunit symtab. */
2832 symtab
->compunit_symtab
= cust
;
2837 /* Allocate and initialize a new compunit.
2838 NAME is the name of the main source file, if there is one, or some
2839 descriptive text if there are no source files. */
2841 struct compunit_symtab
*
2842 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2844 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2845 struct compunit_symtab
);
2846 const char *saved_name
;
2848 cu
->objfile
= objfile
;
2850 /* The name we record here is only for display/debugging purposes.
2851 Just save the basename to avoid path issues (too long for display,
2852 relative vs absolute, etc.). */
2853 saved_name
= lbasename (name
);
2855 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2856 strlen (saved_name
));
2858 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2860 if (symtab_create_debug
)
2862 fprintf_unfiltered (gdb_stdlog
,
2863 "Created compunit symtab %s for %s.\n",
2864 host_address_to_string (cu
),
2871 /* Hook CU to the objfile it comes from. */
2874 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2876 cu
->next
= cu
->objfile
->compunit_symtabs
;
2877 cu
->objfile
->compunit_symtabs
= cu
;
2881 /* Reset all data structures in gdb which may contain references to
2882 symbol table data. */
2885 clear_symtab_users (symfile_add_flags add_flags
)
2887 /* Someday, we should do better than this, by only blowing away
2888 the things that really need to be blown. */
2890 /* Clear the "current" symtab first, because it is no longer valid.
2891 breakpoint_re_set may try to access the current symtab. */
2892 clear_current_source_symtab_and_line ();
2895 clear_last_displayed_sal ();
2896 clear_pc_function_cache ();
2897 observer_notify_new_objfile (NULL
);
2899 /* Clear globals which might have pointed into a removed objfile.
2900 FIXME: It's not clear which of these are supposed to persist
2901 between expressions and which ought to be reset each time. */
2902 expression_context_block
= NULL
;
2903 innermost_block
.reset ();
2905 /* Varobj may refer to old symbols, perform a cleanup. */
2906 varobj_invalidate ();
2908 /* Now that the various caches have been cleared, we can re_set
2909 our breakpoints without risking it using stale data. */
2910 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2911 breakpoint_re_set ();
2915 clear_symtab_users_cleanup (void *ignore
)
2917 clear_symtab_users (0);
2921 The following code implements an abstraction for debugging overlay sections.
2923 The target model is as follows:
2924 1) The gnu linker will permit multiple sections to be mapped into the
2925 same VMA, each with its own unique LMA (or load address).
2926 2) It is assumed that some runtime mechanism exists for mapping the
2927 sections, one by one, from the load address into the VMA address.
2928 3) This code provides a mechanism for gdb to keep track of which
2929 sections should be considered to be mapped from the VMA to the LMA.
2930 This information is used for symbol lookup, and memory read/write.
2931 For instance, if a section has been mapped then its contents
2932 should be read from the VMA, otherwise from the LMA.
2934 Two levels of debugger support for overlays are available. One is
2935 "manual", in which the debugger relies on the user to tell it which
2936 overlays are currently mapped. This level of support is
2937 implemented entirely in the core debugger, and the information about
2938 whether a section is mapped is kept in the objfile->obj_section table.
2940 The second level of support is "automatic", and is only available if
2941 the target-specific code provides functionality to read the target's
2942 overlay mapping table, and translate its contents for the debugger
2943 (by updating the mapped state information in the obj_section tables).
2945 The interface is as follows:
2947 overlay map <name> -- tell gdb to consider this section mapped
2948 overlay unmap <name> -- tell gdb to consider this section unmapped
2949 overlay list -- list the sections that GDB thinks are mapped
2950 overlay read-target -- get the target's state of what's mapped
2951 overlay off/manual/auto -- set overlay debugging state
2952 Functional interface:
2953 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2954 section, return that section.
2955 find_pc_overlay(pc): find any overlay section that contains
2956 the pc, either in its VMA or its LMA
2957 section_is_mapped(sect): true if overlay is marked as mapped
2958 section_is_overlay(sect): true if section's VMA != LMA
2959 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2960 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2961 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2962 overlay_mapped_address(...): map an address from section's LMA to VMA
2963 overlay_unmapped_address(...): map an address from section's VMA to LMA
2964 symbol_overlayed_address(...): Return a "current" address for symbol:
2965 either in VMA or LMA depending on whether
2966 the symbol's section is currently mapped. */
2968 /* Overlay debugging state: */
2970 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2971 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2973 /* Function: section_is_overlay (SECTION)
2974 Returns true if SECTION has VMA not equal to LMA, ie.
2975 SECTION is loaded at an address different from where it will "run". */
2978 section_is_overlay (struct obj_section
*section
)
2980 if (overlay_debugging
&& section
)
2982 asection
*bfd_section
= section
->the_bfd_section
;
2984 if (bfd_section_lma (abfd
, bfd_section
) != 0
2985 && bfd_section_lma (abfd
, bfd_section
)
2986 != bfd_section_vma (abfd
, bfd_section
))
2993 /* Function: overlay_invalidate_all (void)
2994 Invalidate the mapped state of all overlay sections (mark it as stale). */
2997 overlay_invalidate_all (void)
2999 struct objfile
*objfile
;
3000 struct obj_section
*sect
;
3002 ALL_OBJSECTIONS (objfile
, sect
)
3003 if (section_is_overlay (sect
))
3004 sect
->ovly_mapped
= -1;
3007 /* Function: section_is_mapped (SECTION)
3008 Returns true if section is an overlay, and is currently mapped.
3010 Access to the ovly_mapped flag is restricted to this function, so
3011 that we can do automatic update. If the global flag
3012 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3013 overlay_invalidate_all. If the mapped state of the particular
3014 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3017 section_is_mapped (struct obj_section
*osect
)
3019 struct gdbarch
*gdbarch
;
3021 if (osect
== 0 || !section_is_overlay (osect
))
3024 switch (overlay_debugging
)
3028 return 0; /* overlay debugging off */
3029 case ovly_auto
: /* overlay debugging automatic */
3030 /* Unles there is a gdbarch_overlay_update function,
3031 there's really nothing useful to do here (can't really go auto). */
3032 gdbarch
= get_objfile_arch (osect
->objfile
);
3033 if (gdbarch_overlay_update_p (gdbarch
))
3035 if (overlay_cache_invalid
)
3037 overlay_invalidate_all ();
3038 overlay_cache_invalid
= 0;
3040 if (osect
->ovly_mapped
== -1)
3041 gdbarch_overlay_update (gdbarch
, osect
);
3043 /* fall thru to manual case */
3044 case ovly_on
: /* overlay debugging manual */
3045 return osect
->ovly_mapped
== 1;
3049 /* Function: pc_in_unmapped_range
3050 If PC falls into the lma range of SECTION, return true, else false. */
3053 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3055 if (section_is_overlay (section
))
3057 bfd
*abfd
= section
->objfile
->obfd
;
3058 asection
*bfd_section
= section
->the_bfd_section
;
3060 /* We assume the LMA is relocated by the same offset as the VMA. */
3061 bfd_vma size
= bfd_get_section_size (bfd_section
);
3062 CORE_ADDR offset
= obj_section_offset (section
);
3064 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3065 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3072 /* Function: pc_in_mapped_range
3073 If PC falls into the vma range of SECTION, return true, else false. */
3076 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3078 if (section_is_overlay (section
))
3080 if (obj_section_addr (section
) <= pc
3081 && pc
< obj_section_endaddr (section
))
3088 /* Return true if the mapped ranges of sections A and B overlap, false
3092 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3094 CORE_ADDR a_start
= obj_section_addr (a
);
3095 CORE_ADDR a_end
= obj_section_endaddr (a
);
3096 CORE_ADDR b_start
= obj_section_addr (b
);
3097 CORE_ADDR b_end
= obj_section_endaddr (b
);
3099 return (a_start
< b_end
&& b_start
< a_end
);
3102 /* Function: overlay_unmapped_address (PC, SECTION)
3103 Returns the address corresponding to PC in the unmapped (load) range.
3104 May be the same as PC. */
3107 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3109 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3111 asection
*bfd_section
= section
->the_bfd_section
;
3113 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3114 - bfd_section_vma (abfd
, bfd_section
);
3120 /* Function: overlay_mapped_address (PC, SECTION)
3121 Returns the address corresponding to PC in the mapped (runtime) range.
3122 May be the same as PC. */
3125 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3127 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3129 asection
*bfd_section
= section
->the_bfd_section
;
3131 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3132 - bfd_section_lma (abfd
, bfd_section
);
3138 /* Function: symbol_overlayed_address
3139 Return one of two addresses (relative to the VMA or to the LMA),
3140 depending on whether the section is mapped or not. */
3143 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3145 if (overlay_debugging
)
3147 /* If the symbol has no section, just return its regular address. */
3150 /* If the symbol's section is not an overlay, just return its
3152 if (!section_is_overlay (section
))
3154 /* If the symbol's section is mapped, just return its address. */
3155 if (section_is_mapped (section
))
3158 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3159 * then return its LOADED address rather than its vma address!!
3161 return overlay_unmapped_address (address
, section
);
3166 /* Function: find_pc_overlay (PC)
3167 Return the best-match overlay section for PC:
3168 If PC matches a mapped overlay section's VMA, return that section.
3169 Else if PC matches an unmapped section's VMA, return that section.
3170 Else if PC matches an unmapped section's LMA, return that section. */
3172 struct obj_section
*
3173 find_pc_overlay (CORE_ADDR pc
)
3175 struct objfile
*objfile
;
3176 struct obj_section
*osect
, *best_match
= NULL
;
3178 if (overlay_debugging
)
3180 ALL_OBJSECTIONS (objfile
, osect
)
3181 if (section_is_overlay (osect
))
3183 if (pc_in_mapped_range (pc
, osect
))
3185 if (section_is_mapped (osect
))
3190 else if (pc_in_unmapped_range (pc
, osect
))
3197 /* Function: find_pc_mapped_section (PC)
3198 If PC falls into the VMA address range of an overlay section that is
3199 currently marked as MAPPED, return that section. Else return NULL. */
3201 struct obj_section
*
3202 find_pc_mapped_section (CORE_ADDR pc
)
3204 struct objfile
*objfile
;
3205 struct obj_section
*osect
;
3207 if (overlay_debugging
)
3209 ALL_OBJSECTIONS (objfile
, osect
)
3210 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3217 /* Function: list_overlays_command
3218 Print a list of mapped sections and their PC ranges. */
3221 list_overlays_command (const char *args
, int from_tty
)
3224 struct objfile
*objfile
;
3225 struct obj_section
*osect
;
3227 if (overlay_debugging
)
3229 ALL_OBJSECTIONS (objfile
, osect
)
3230 if (section_is_mapped (osect
))
3232 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3237 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3238 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3239 size
= bfd_get_section_size (osect
->the_bfd_section
);
3240 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3242 printf_filtered ("Section %s, loaded at ", name
);
3243 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3244 puts_filtered (" - ");
3245 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3246 printf_filtered (", mapped at ");
3247 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3248 puts_filtered (" - ");
3249 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3250 puts_filtered ("\n");
3256 printf_filtered (_("No sections are mapped.\n"));
3259 /* Function: map_overlay_command
3260 Mark the named section as mapped (ie. residing at its VMA address). */
3263 map_overlay_command (const char *args
, int from_tty
)
3265 struct objfile
*objfile
, *objfile2
;
3266 struct obj_section
*sec
, *sec2
;
3268 if (!overlay_debugging
)
3269 error (_("Overlay debugging not enabled. Use "
3270 "either the 'overlay auto' or\n"
3271 "the 'overlay manual' command."));
3273 if (args
== 0 || *args
== 0)
3274 error (_("Argument required: name of an overlay section"));
3276 /* First, find a section matching the user supplied argument. */
3277 ALL_OBJSECTIONS (objfile
, sec
)
3278 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3280 /* Now, check to see if the section is an overlay. */
3281 if (!section_is_overlay (sec
))
3282 continue; /* not an overlay section */
3284 /* Mark the overlay as "mapped". */
3285 sec
->ovly_mapped
= 1;
3287 /* Next, make a pass and unmap any sections that are
3288 overlapped by this new section: */
3289 ALL_OBJSECTIONS (objfile2
, sec2
)
3290 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3293 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3294 bfd_section_name (objfile
->obfd
,
3295 sec2
->the_bfd_section
));
3296 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3300 error (_("No overlay section called %s"), args
);
3303 /* Function: unmap_overlay_command
3304 Mark the overlay section as unmapped
3305 (ie. resident in its LMA address range, rather than the VMA range). */
3308 unmap_overlay_command (const char *args
, int from_tty
)
3310 struct objfile
*objfile
;
3311 struct obj_section
*sec
= NULL
;
3313 if (!overlay_debugging
)
3314 error (_("Overlay debugging not enabled. "
3315 "Use either the 'overlay auto' or\n"
3316 "the 'overlay manual' command."));
3318 if (args
== 0 || *args
== 0)
3319 error (_("Argument required: name of an overlay section"));
3321 /* First, find a section matching the user supplied argument. */
3322 ALL_OBJSECTIONS (objfile
, sec
)
3323 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3325 if (!sec
->ovly_mapped
)
3326 error (_("Section %s is not mapped"), args
);
3327 sec
->ovly_mapped
= 0;
3330 error (_("No overlay section called %s"), args
);
3333 /* Function: overlay_auto_command
3334 A utility command to turn on overlay debugging.
3335 Possibly this should be done via a set/show command. */
3338 overlay_auto_command (const char *args
, int from_tty
)
3340 overlay_debugging
= ovly_auto
;
3341 enable_overlay_breakpoints ();
3343 printf_unfiltered (_("Automatic overlay debugging enabled."));
3346 /* Function: overlay_manual_command
3347 A utility command to turn on overlay debugging.
3348 Possibly this should be done via a set/show command. */
3351 overlay_manual_command (const char *args
, int from_tty
)
3353 overlay_debugging
= ovly_on
;
3354 disable_overlay_breakpoints ();
3356 printf_unfiltered (_("Overlay debugging enabled."));
3359 /* Function: overlay_off_command
3360 A utility command to turn on overlay debugging.
3361 Possibly this should be done via a set/show command. */
3364 overlay_off_command (const char *args
, int from_tty
)
3366 overlay_debugging
= ovly_off
;
3367 disable_overlay_breakpoints ();
3369 printf_unfiltered (_("Overlay debugging disabled."));
3373 overlay_load_command (const char *args
, int from_tty
)
3375 struct gdbarch
*gdbarch
= get_current_arch ();
3377 if (gdbarch_overlay_update_p (gdbarch
))
3378 gdbarch_overlay_update (gdbarch
, NULL
);
3380 error (_("This target does not know how to read its overlay state."));
3383 /* Function: overlay_command
3384 A place-holder for a mis-typed command. */
3386 /* Command list chain containing all defined "overlay" subcommands. */
3387 static struct cmd_list_element
*overlaylist
;
3390 overlay_command (const char *args
, int from_tty
)
3393 ("\"overlay\" must be followed by the name of an overlay command.\n");
3394 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3397 /* Target Overlays for the "Simplest" overlay manager:
3399 This is GDB's default target overlay layer. It works with the
3400 minimal overlay manager supplied as an example by Cygnus. The
3401 entry point is via a function pointer "gdbarch_overlay_update",
3402 so targets that use a different runtime overlay manager can
3403 substitute their own overlay_update function and take over the
3406 The overlay_update function pokes around in the target's data structures
3407 to see what overlays are mapped, and updates GDB's overlay mapping with
3410 In this simple implementation, the target data structures are as follows:
3411 unsigned _novlys; /# number of overlay sections #/
3412 unsigned _ovly_table[_novlys][4] = {
3413 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3414 {..., ..., ..., ...},
3416 unsigned _novly_regions; /# number of overlay regions #/
3417 unsigned _ovly_region_table[_novly_regions][3] = {
3418 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3421 These functions will attempt to update GDB's mappedness state in the
3422 symbol section table, based on the target's mappedness state.
3424 To do this, we keep a cached copy of the target's _ovly_table, and
3425 attempt to detect when the cached copy is invalidated. The main
3426 entry point is "simple_overlay_update(SECT), which looks up SECT in
3427 the cached table and re-reads only the entry for that section from
3428 the target (whenever possible). */
3430 /* Cached, dynamically allocated copies of the target data structures: */
3431 static unsigned (*cache_ovly_table
)[4] = 0;
3432 static unsigned cache_novlys
= 0;
3433 static CORE_ADDR cache_ovly_table_base
= 0;
3436 VMA
, OSIZE
, LMA
, MAPPED
3439 /* Throw away the cached copy of _ovly_table. */
3442 simple_free_overlay_table (void)
3444 if (cache_ovly_table
)
3445 xfree (cache_ovly_table
);
3447 cache_ovly_table
= NULL
;
3448 cache_ovly_table_base
= 0;
3451 /* Read an array of ints of size SIZE from the target into a local buffer.
3452 Convert to host order. int LEN is number of ints. */
3455 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3456 int len
, int size
, enum bfd_endian byte_order
)
3458 /* FIXME (alloca): Not safe if array is very large. */
3459 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3462 read_memory (memaddr
, buf
, len
* size
);
3463 for (i
= 0; i
< len
; i
++)
3464 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3467 /* Find and grab a copy of the target _ovly_table
3468 (and _novlys, which is needed for the table's size). */
3471 simple_read_overlay_table (void)
3473 struct bound_minimal_symbol novlys_msym
;
3474 struct bound_minimal_symbol ovly_table_msym
;
3475 struct gdbarch
*gdbarch
;
3477 enum bfd_endian byte_order
;
3479 simple_free_overlay_table ();
3480 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3481 if (! novlys_msym
.minsym
)
3483 error (_("Error reading inferior's overlay table: "
3484 "couldn't find `_novlys' variable\n"
3485 "in inferior. Use `overlay manual' mode."));
3489 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3490 if (! ovly_table_msym
.minsym
)
3492 error (_("Error reading inferior's overlay table: couldn't find "
3493 "`_ovly_table' array\n"
3494 "in inferior. Use `overlay manual' mode."));
3498 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3499 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3500 byte_order
= gdbarch_byte_order (gdbarch
);
3502 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3505 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3506 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3507 read_target_long_array (cache_ovly_table_base
,
3508 (unsigned int *) cache_ovly_table
,
3509 cache_novlys
* 4, word_size
, byte_order
);
3511 return 1; /* SUCCESS */
3514 /* Function: simple_overlay_update_1
3515 A helper function for simple_overlay_update. Assuming a cached copy
3516 of _ovly_table exists, look through it to find an entry whose vma,
3517 lma and size match those of OSECT. Re-read the entry and make sure
3518 it still matches OSECT (else the table may no longer be valid).
3519 Set OSECT's mapped state to match the entry. Return: 1 for
3520 success, 0 for failure. */
3523 simple_overlay_update_1 (struct obj_section
*osect
)
3526 asection
*bsect
= osect
->the_bfd_section
;
3527 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3528 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3529 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3531 for (i
= 0; i
< cache_novlys
; i
++)
3532 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3533 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3535 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3536 (unsigned int *) cache_ovly_table
[i
],
3537 4, word_size
, byte_order
);
3538 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3539 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3541 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3544 else /* Warning! Warning! Target's ovly table has changed! */
3550 /* Function: simple_overlay_update
3551 If OSECT is NULL, then update all sections' mapped state
3552 (after re-reading the entire target _ovly_table).
3553 If OSECT is non-NULL, then try to find a matching entry in the
3554 cached ovly_table and update only OSECT's mapped state.
3555 If a cached entry can't be found or the cache isn't valid, then
3556 re-read the entire cache, and go ahead and update all sections. */
3559 simple_overlay_update (struct obj_section
*osect
)
3561 struct objfile
*objfile
;
3563 /* Were we given an osect to look up? NULL means do all of them. */
3565 /* Have we got a cached copy of the target's overlay table? */
3566 if (cache_ovly_table
!= NULL
)
3568 /* Does its cached location match what's currently in the
3570 struct bound_minimal_symbol minsym
3571 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3573 if (minsym
.minsym
== NULL
)
3574 error (_("Error reading inferior's overlay table: couldn't "
3575 "find `_ovly_table' array\n"
3576 "in inferior. Use `overlay manual' mode."));
3578 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3579 /* Then go ahead and try to look up this single section in
3581 if (simple_overlay_update_1 (osect
))
3582 /* Found it! We're done. */
3586 /* Cached table no good: need to read the entire table anew.
3587 Or else we want all the sections, in which case it's actually
3588 more efficient to read the whole table in one block anyway. */
3590 if (! simple_read_overlay_table ())
3593 /* Now may as well update all sections, even if only one was requested. */
3594 ALL_OBJSECTIONS (objfile
, osect
)
3595 if (section_is_overlay (osect
))
3598 asection
*bsect
= osect
->the_bfd_section
;
3600 for (i
= 0; i
< cache_novlys
; i
++)
3601 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3602 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3603 { /* obj_section matches i'th entry in ovly_table. */
3604 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3605 break; /* finished with inner for loop: break out. */
3610 /* Set the output sections and output offsets for section SECTP in
3611 ABFD. The relocation code in BFD will read these offsets, so we
3612 need to be sure they're initialized. We map each section to itself,
3613 with no offset; this means that SECTP->vma will be honored. */
3616 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3618 sectp
->output_section
= sectp
;
3619 sectp
->output_offset
= 0;
3622 /* Default implementation for sym_relocate. */
3625 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3628 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3630 bfd
*abfd
= sectp
->owner
;
3632 /* We're only interested in sections with relocation
3634 if ((sectp
->flags
& SEC_RELOC
) == 0)
3637 /* We will handle section offsets properly elsewhere, so relocate as if
3638 all sections begin at 0. */
3639 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3641 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3644 /* Relocate the contents of a debug section SECTP in ABFD. The
3645 contents are stored in BUF if it is non-NULL, or returned in a
3646 malloc'd buffer otherwise.
3648 For some platforms and debug info formats, shared libraries contain
3649 relocations against the debug sections (particularly for DWARF-2;
3650 one affected platform is PowerPC GNU/Linux, although it depends on
3651 the version of the linker in use). Also, ELF object files naturally
3652 have unresolved relocations for their debug sections. We need to apply
3653 the relocations in order to get the locations of symbols correct.
3654 Another example that may require relocation processing, is the
3655 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3659 symfile_relocate_debug_section (struct objfile
*objfile
,
3660 asection
*sectp
, bfd_byte
*buf
)
3662 gdb_assert (objfile
->sf
->sym_relocate
);
3664 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3667 struct symfile_segment_data
*
3668 get_symfile_segment_data (bfd
*abfd
)
3670 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3675 return sf
->sym_segments (abfd
);
3679 free_symfile_segment_data (struct symfile_segment_data
*data
)
3681 xfree (data
->segment_bases
);
3682 xfree (data
->segment_sizes
);
3683 xfree (data
->segment_info
);
3688 - DATA, containing segment addresses from the object file ABFD, and
3689 the mapping from ABFD's sections onto the segments that own them,
3691 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3692 segment addresses reported by the target,
3693 store the appropriate offsets for each section in OFFSETS.
3695 If there are fewer entries in SEGMENT_BASES than there are segments
3696 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3698 If there are more entries, then ignore the extra. The target may
3699 not be able to distinguish between an empty data segment and a
3700 missing data segment; a missing text segment is less plausible. */
3703 symfile_map_offsets_to_segments (bfd
*abfd
,
3704 const struct symfile_segment_data
*data
,
3705 struct section_offsets
*offsets
,
3706 int num_segment_bases
,
3707 const CORE_ADDR
*segment_bases
)
3712 /* It doesn't make sense to call this function unless you have some
3713 segment base addresses. */
3714 gdb_assert (num_segment_bases
> 0);
3716 /* If we do not have segment mappings for the object file, we
3717 can not relocate it by segments. */
3718 gdb_assert (data
!= NULL
);
3719 gdb_assert (data
->num_segments
> 0);
3721 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3723 int which
= data
->segment_info
[i
];
3725 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3727 /* Don't bother computing offsets for sections that aren't
3728 loaded as part of any segment. */
3732 /* Use the last SEGMENT_BASES entry as the address of any extra
3733 segments mentioned in DATA->segment_info. */
3734 if (which
> num_segment_bases
)
3735 which
= num_segment_bases
;
3737 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3738 - data
->segment_bases
[which
- 1]);
3745 symfile_find_segment_sections (struct objfile
*objfile
)
3747 bfd
*abfd
= objfile
->obfd
;
3750 struct symfile_segment_data
*data
;
3752 data
= get_symfile_segment_data (objfile
->obfd
);
3756 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3758 free_symfile_segment_data (data
);
3762 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3764 int which
= data
->segment_info
[i
];
3768 if (objfile
->sect_index_text
== -1)
3769 objfile
->sect_index_text
= sect
->index
;
3771 if (objfile
->sect_index_rodata
== -1)
3772 objfile
->sect_index_rodata
= sect
->index
;
3774 else if (which
== 2)
3776 if (objfile
->sect_index_data
== -1)
3777 objfile
->sect_index_data
= sect
->index
;
3779 if (objfile
->sect_index_bss
== -1)
3780 objfile
->sect_index_bss
= sect
->index
;
3784 free_symfile_segment_data (data
);
3787 /* Listen for free_objfile events. */
3790 symfile_free_objfile (struct objfile
*objfile
)
3792 /* Remove the target sections owned by this objfile. */
3793 if (objfile
!= NULL
)
3794 remove_target_sections ((void *) objfile
);
3797 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3798 Expand all symtabs that match the specified criteria.
3799 See quick_symbol_functions.expand_symtabs_matching for details. */
3802 expand_symtabs_matching
3803 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3804 const lookup_name_info
&lookup_name
,
3805 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3806 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3807 enum search_domain kind
)
3809 struct objfile
*objfile
;
3811 ALL_OBJFILES (objfile
)
3814 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3817 expansion_notify
, kind
);
3821 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3822 Map function FUN over every file.
3823 See quick_symbol_functions.map_symbol_filenames for details. */
3826 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3829 struct objfile
*objfile
;
3831 ALL_OBJFILES (objfile
)
3834 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3841 namespace selftests
{
3842 namespace filename_language
{
3844 static void test_filename_language ()
3846 /* This test messes up the filename_language_table global. */
3847 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3849 /* Test deducing an unknown extension. */
3850 language lang
= deduce_language_from_filename ("myfile.blah");
3851 SELF_CHECK (lang
== language_unknown
);
3853 /* Test deducing a known extension. */
3854 lang
= deduce_language_from_filename ("myfile.c");
3855 SELF_CHECK (lang
== language_c
);
3857 /* Test adding a new extension using the internal API. */
3858 add_filename_language (".blah", language_pascal
);
3859 lang
= deduce_language_from_filename ("myfile.blah");
3860 SELF_CHECK (lang
== language_pascal
);
3864 test_set_ext_lang_command ()
3866 /* This test messes up the filename_language_table global. */
3867 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3869 /* Confirm that the .hello extension is not known. */
3870 language lang
= deduce_language_from_filename ("cake.hello");
3871 SELF_CHECK (lang
== language_unknown
);
3873 /* Test adding a new extension using the CLI command. */
3874 gdb::unique_xmalloc_ptr
<char> args_holder (xstrdup (".hello rust"));
3875 ext_args
= args_holder
.get ();
3876 set_ext_lang_command (NULL
, 1, NULL
);
3878 lang
= deduce_language_from_filename ("cake.hello");
3879 SELF_CHECK (lang
== language_rust
);
3881 /* Test overriding an existing extension using the CLI command. */
3882 int size_before
= filename_language_table
.size ();
3883 args_holder
.reset (xstrdup (".hello pascal"));
3884 ext_args
= args_holder
.get ();
3885 set_ext_lang_command (NULL
, 1, NULL
);
3886 int size_after
= filename_language_table
.size ();
3888 lang
= deduce_language_from_filename ("cake.hello");
3889 SELF_CHECK (lang
== language_pascal
);
3890 SELF_CHECK (size_before
== size_after
);
3893 } /* namespace filename_language */
3894 } /* namespace selftests */
3896 #endif /* GDB_SELF_TEST */
3899 _initialize_symfile (void)
3901 struct cmd_list_element
*c
;
3903 observer_attach_free_objfile (symfile_free_objfile
);
3905 #define READNOW_READNEVER_HELP \
3906 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3907 immediately. This makes the command slower, but may make future operations\n\
3909 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3910 symbolic debug information."
3912 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3913 Load symbol table from executable file FILE.\n\
3914 Usage: symbol-file [-readnow | -readnever] FILE\n\
3915 The `file' command can also load symbol tables, as well as setting the file\n\
3916 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3917 set_cmd_completer (c
, filename_completer
);
3919 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3920 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3921 Usage: add-symbol-file FILE ADDR [-readnow | -readnever | \
3922 -s SECT-NAME SECT-ADDR]...\n\
3923 ADDR is the starting address of the file's text.\n\
3924 Each '-s' argument provides a section name and address, and\n\
3925 should be specified if the data and bss segments are not contiguous\n\
3926 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n"
3927 READNOW_READNEVER_HELP
),
3929 set_cmd_completer (c
, filename_completer
);
3931 c
= add_cmd ("remove-symbol-file", class_files
,
3932 remove_symbol_file_command
, _("\
3933 Remove a symbol file added via the add-symbol-file command.\n\
3934 Usage: remove-symbol-file FILENAME\n\
3935 remove-symbol-file -a ADDRESS\n\
3936 The file to remove can be identified by its filename or by an address\n\
3937 that lies within the boundaries of this symbol file in memory."),
3940 c
= add_cmd ("load", class_files
, load_command
, _("\
3941 Dynamically load FILE into the running program, and record its symbols\n\
3942 for access from GDB.\n\
3943 Usage: load [FILE] [OFFSET]\n\
3944 An optional load OFFSET may also be given as a literal address.\n\
3945 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3946 on its own."), &cmdlist
);
3947 set_cmd_completer (c
, filename_completer
);
3949 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3950 _("Commands for debugging overlays."), &overlaylist
,
3951 "overlay ", 0, &cmdlist
);
3953 add_com_alias ("ovly", "overlay", class_alias
, 1);
3954 add_com_alias ("ov", "overlay", class_alias
, 1);
3956 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3957 _("Assert that an overlay section is mapped."), &overlaylist
);
3959 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3960 _("Assert that an overlay section is unmapped."), &overlaylist
);
3962 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3963 _("List mappings of overlay sections."), &overlaylist
);
3965 add_cmd ("manual", class_support
, overlay_manual_command
,
3966 _("Enable overlay debugging."), &overlaylist
);
3967 add_cmd ("off", class_support
, overlay_off_command
,
3968 _("Disable overlay debugging."), &overlaylist
);
3969 add_cmd ("auto", class_support
, overlay_auto_command
,
3970 _("Enable automatic overlay debugging."), &overlaylist
);
3971 add_cmd ("load-target", class_support
, overlay_load_command
,
3972 _("Read the overlay mapping state from the target."), &overlaylist
);
3974 /* Filename extension to source language lookup table: */
3975 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3977 Set mapping between filename extension and source language."), _("\
3978 Show mapping between filename extension and source language."), _("\
3979 Usage: set extension-language .foo bar"),
3980 set_ext_lang_command
,
3982 &setlist
, &showlist
);
3984 add_info ("extensions", info_ext_lang_command
,
3985 _("All filename extensions associated with a source language."));
3987 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3988 &debug_file_directory
, _("\
3989 Set the directories where separate debug symbols are searched for."), _("\
3990 Show the directories where separate debug symbols are searched for."), _("\
3991 Separate debug symbols are first searched for in the same\n\
3992 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3993 and lastly at the path of the directory of the binary with\n\
3994 each global debug-file-directory component prepended."),
3996 show_debug_file_directory
,
3997 &setlist
, &showlist
);
3999 add_setshow_enum_cmd ("symbol-loading", no_class
,
4000 print_symbol_loading_enums
, &print_symbol_loading
,
4002 Set printing of symbol loading messages."), _("\
4003 Show printing of symbol loading messages."), _("\
4004 off == turn all messages off\n\
4005 brief == print messages for the executable,\n\
4006 and brief messages for shared libraries\n\
4007 full == print messages for the executable,\n\
4008 and messages for each shared library."),
4011 &setprintlist
, &showprintlist
);
4013 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
4014 &separate_debug_file_debug
, _("\
4015 Set printing of separate debug info file search debug."), _("\
4016 Show printing of separate debug info file search debug."), _("\
4017 When on, GDB prints the searched locations while looking for separate debug \
4018 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
4021 selftests::register_test
4022 ("filename_language", selftests::filename_language::test_filename_language
);
4023 selftests::register_test
4024 ("set_ext_lang_command",
4025 selftests::filename_language::test_set_ext_lang_command
);