1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2019 Free Software Foundation, Inc.
5 Contributed by Cygnus Support, using pieces from other GDB modules.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "arch-utils.h"
35 #include "breakpoint.h"
37 #include "complaints.h"
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
49 #include "observable.h"
51 #include "parser-defs.h"
58 #include "cli/cli-utils.h"
59 #include "common/byte-vector.h"
60 #include "common/selftest.h"
61 #include "cli/cli-style.h"
62 #include "common/forward-scope-exit.h"
64 #include <sys/types.h>
73 int (*deprecated_ui_load_progress_hook
) (const char *section
,
75 void (*deprecated_show_load_progress
) (const char *section
,
76 unsigned long section_sent
,
77 unsigned long section_size
,
78 unsigned long total_sent
,
79 unsigned long total_size
);
80 void (*deprecated_pre_add_symbol_hook
) (const char *);
81 void (*deprecated_post_add_symbol_hook
) (void);
83 using clear_symtab_users_cleanup
84 = FORWARD_SCOPE_EXIT (clear_symtab_users
);
86 /* Global variables owned by this file. */
87 int readnow_symbol_files
; /* Read full symbols immediately. */
88 int readnever_symbol_files
; /* Never read full symbols. */
90 /* Functions this file defines. */
92 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
93 objfile_flags flags
, CORE_ADDR reloff
);
95 static const struct sym_fns
*find_sym_fns (bfd
*);
97 static void overlay_invalidate_all (void);
99 static void simple_free_overlay_table (void);
101 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
104 static int simple_read_overlay_table (void);
106 static int simple_overlay_update_1 (struct obj_section
*);
108 static void symfile_find_segment_sections (struct objfile
*objfile
);
110 /* List of all available sym_fns. On gdb startup, each object file reader
111 calls add_symtab_fns() to register information on each format it is
114 struct registered_sym_fns
116 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
117 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
120 /* BFD flavour that we handle. */
121 enum bfd_flavour sym_flavour
;
123 /* The "vtable" of symbol functions. */
124 const struct sym_fns
*sym_fns
;
127 static std::vector
<registered_sym_fns
> symtab_fns
;
129 /* Values for "set print symbol-loading". */
131 const char print_symbol_loading_off
[] = "off";
132 const char print_symbol_loading_brief
[] = "brief";
133 const char print_symbol_loading_full
[] = "full";
134 static const char *print_symbol_loading_enums
[] =
136 print_symbol_loading_off
,
137 print_symbol_loading_brief
,
138 print_symbol_loading_full
,
141 static const char *print_symbol_loading
= print_symbol_loading_full
;
143 /* If non-zero, shared library symbols will be added automatically
144 when the inferior is created, new libraries are loaded, or when
145 attaching to the inferior. This is almost always what users will
146 want to have happen; but for very large programs, the startup time
147 will be excessive, and so if this is a problem, the user can clear
148 this flag and then add the shared library symbols as needed. Note
149 that there is a potential for confusion, since if the shared
150 library symbols are not loaded, commands like "info fun" will *not*
151 report all the functions that are actually present. */
153 int auto_solib_add
= 1;
156 /* Return non-zero if symbol-loading messages should be printed.
157 FROM_TTY is the standard from_tty argument to gdb commands.
158 If EXEC is non-zero the messages are for the executable.
159 Otherwise, messages are for shared libraries.
160 If FULL is non-zero then the caller is printing a detailed message.
161 E.g., the message includes the shared library name.
162 Otherwise, the caller is printing a brief "summary" message. */
165 print_symbol_loading_p (int from_tty
, int exec
, int full
)
167 if (!from_tty
&& !info_verbose
)
172 /* We don't check FULL for executables, there are few such
173 messages, therefore brief == full. */
174 return print_symbol_loading
!= print_symbol_loading_off
;
177 return print_symbol_loading
== print_symbol_loading_full
;
178 return print_symbol_loading
== print_symbol_loading_brief
;
181 /* True if we are reading a symbol table. */
183 int currently_reading_symtab
= 0;
185 /* Increment currently_reading_symtab and return a cleanup that can be
186 used to decrement it. */
188 scoped_restore_tmpl
<int>
189 increment_reading_symtab (void)
191 gdb_assert (currently_reading_symtab
>= 0);
192 return make_scoped_restore (¤tly_reading_symtab
,
193 currently_reading_symtab
+ 1);
196 /* Remember the lowest-addressed loadable section we've seen.
197 This function is called via bfd_map_over_sections.
199 In case of equal vmas, the section with the largest size becomes the
200 lowest-addressed loadable section.
202 If the vmas and sizes are equal, the last section is considered the
203 lowest-addressed loadable section. */
206 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
208 asection
**lowest
= (asection
**) obj
;
210 if (0 == (bfd_get_section_flags (abfd
, sect
) & (SEC_ALLOC
| SEC_LOAD
)))
213 *lowest
= sect
; /* First loadable section */
214 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
215 *lowest
= sect
; /* A lower loadable section */
216 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
217 && (bfd_section_size (abfd
, (*lowest
))
218 <= bfd_section_size (abfd
, sect
)))
222 /* Build (allocate and populate) a section_addr_info struct from
223 an existing section table. */
226 build_section_addr_info_from_section_table (const struct target_section
*start
,
227 const struct target_section
*end
)
229 const struct target_section
*stp
;
231 section_addr_info sap
;
233 for (stp
= start
; stp
!= end
; stp
++)
235 struct bfd_section
*asect
= stp
->the_bfd_section
;
236 bfd
*abfd
= asect
->owner
;
238 if (bfd_get_section_flags (abfd
, asect
) & (SEC_ALLOC
| SEC_LOAD
)
239 && sap
.size () < end
- start
)
240 sap
.emplace_back (stp
->addr
,
241 bfd_section_name (abfd
, asect
),
242 gdb_bfd_section_index (abfd
, asect
));
248 /* Create a section_addr_info from section offsets in ABFD. */
250 static section_addr_info
251 build_section_addr_info_from_bfd (bfd
*abfd
)
253 struct bfd_section
*sec
;
255 section_addr_info sap
;
256 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
257 if (bfd_get_section_flags (abfd
, sec
) & (SEC_ALLOC
| SEC_LOAD
))
258 sap
.emplace_back (bfd_get_section_vma (abfd
, sec
),
259 bfd_get_section_name (abfd
, sec
),
260 gdb_bfd_section_index (abfd
, sec
));
265 /* Create a section_addr_info from section offsets in OBJFILE. */
268 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
272 /* Before reread_symbols gets rewritten it is not safe to call:
273 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
275 section_addr_info sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
276 for (i
= 0; i
< sap
.size (); i
++)
278 int sectindex
= sap
[i
].sectindex
;
280 sap
[i
].addr
+= objfile
->section_offsets
->offsets
[sectindex
];
285 /* Initialize OBJFILE's sect_index_* members. */
288 init_objfile_sect_indices (struct objfile
*objfile
)
293 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
295 objfile
->sect_index_text
= sect
->index
;
297 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
299 objfile
->sect_index_data
= sect
->index
;
301 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
303 objfile
->sect_index_bss
= sect
->index
;
305 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
307 objfile
->sect_index_rodata
= sect
->index
;
309 /* This is where things get really weird... We MUST have valid
310 indices for the various sect_index_* members or gdb will abort.
311 So if for example, there is no ".text" section, we have to
312 accomodate that. First, check for a file with the standard
313 one or two segments. */
315 symfile_find_segment_sections (objfile
);
317 /* Except when explicitly adding symbol files at some address,
318 section_offsets contains nothing but zeros, so it doesn't matter
319 which slot in section_offsets the individual sect_index_* members
320 index into. So if they are all zero, it is safe to just point
321 all the currently uninitialized indices to the first slot. But
322 beware: if this is the main executable, it may be relocated
323 later, e.g. by the remote qOffsets packet, and then this will
324 be wrong! That's why we try segments first. */
326 for (i
= 0; i
< objfile
->num_sections
; i
++)
328 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
333 if (i
== objfile
->num_sections
)
335 if (objfile
->sect_index_text
== -1)
336 objfile
->sect_index_text
= 0;
337 if (objfile
->sect_index_data
== -1)
338 objfile
->sect_index_data
= 0;
339 if (objfile
->sect_index_bss
== -1)
340 objfile
->sect_index_bss
= 0;
341 if (objfile
->sect_index_rodata
== -1)
342 objfile
->sect_index_rodata
= 0;
346 /* The arguments to place_section. */
348 struct place_section_arg
350 struct section_offsets
*offsets
;
354 /* Find a unique offset to use for loadable section SECT if
355 the user did not provide an offset. */
358 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
360 struct place_section_arg
*arg
= (struct place_section_arg
*) obj
;
361 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
363 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
365 /* We are only interested in allocated sections. */
366 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
369 /* If the user specified an offset, honor it. */
370 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
373 /* Otherwise, let's try to find a place for the section. */
374 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
381 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
383 int indx
= cur_sec
->index
;
385 /* We don't need to compare against ourself. */
389 /* We can only conflict with allocated sections. */
390 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
393 /* If the section offset is 0, either the section has not been placed
394 yet, or it was the lowest section placed (in which case LOWEST
395 will be past its end). */
396 if (offsets
[indx
] == 0)
399 /* If this section would overlap us, then we must move up. */
400 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
401 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
403 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
404 start_addr
= (start_addr
+ align
- 1) & -align
;
409 /* Otherwise, we appear to be OK. So far. */
414 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
415 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
418 /* Store section_addr_info as prepared (made relative and with SECTINDEX
419 filled-in) by addr_info_make_relative into SECTION_OFFSETS of NUM_SECTIONS
423 relative_addr_info_to_section_offsets (struct section_offsets
*section_offsets
,
425 const section_addr_info
&addrs
)
429 memset (section_offsets
, 0, SIZEOF_N_SECTION_OFFSETS (num_sections
));
431 /* Now calculate offsets for section that were specified by the caller. */
432 for (i
= 0; i
< addrs
.size (); i
++)
434 const struct other_sections
*osp
;
437 if (osp
->sectindex
== -1)
440 /* Record all sections in offsets. */
441 /* The section_offsets in the objfile are here filled in using
443 section_offsets
->offsets
[osp
->sectindex
] = osp
->addr
;
447 /* Transform section name S for a name comparison. prelink can split section
448 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
449 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
450 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
451 (`.sbss') section has invalid (increased) virtual address. */
454 addr_section_name (const char *s
)
456 if (strcmp (s
, ".dynbss") == 0)
458 if (strcmp (s
, ".sdynbss") == 0)
464 /* std::sort comparator for addrs_section_sort. Sort entries in
465 ascending order by their (name, sectindex) pair. sectindex makes
466 the sort by name stable. */
469 addrs_section_compar (const struct other_sections
*a
,
470 const struct other_sections
*b
)
474 retval
= strcmp (addr_section_name (a
->name
.c_str ()),
475 addr_section_name (b
->name
.c_str ()));
479 return a
->sectindex
< b
->sectindex
;
482 /* Provide sorted array of pointers to sections of ADDRS. */
484 static std::vector
<const struct other_sections
*>
485 addrs_section_sort (const section_addr_info
&addrs
)
489 std::vector
<const struct other_sections
*> array (addrs
.size ());
490 for (i
= 0; i
< addrs
.size (); i
++)
491 array
[i
] = &addrs
[i
];
493 std::sort (array
.begin (), array
.end (), addrs_section_compar
);
498 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
499 also SECTINDEXes specific to ABFD there. This function can be used to
500 rebase ADDRS to start referencing different BFD than before. */
503 addr_info_make_relative (section_addr_info
*addrs
, bfd
*abfd
)
505 asection
*lower_sect
;
506 CORE_ADDR lower_offset
;
509 /* Find lowest loadable section to be used as starting point for
510 continguous sections. */
512 bfd_map_over_sections (abfd
, find_lowest_section
, &lower_sect
);
513 if (lower_sect
== NULL
)
515 warning (_("no loadable sections found in added symbol-file %s"),
516 bfd_get_filename (abfd
));
520 lower_offset
= bfd_section_vma (bfd_get_filename (abfd
), lower_sect
);
522 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
523 in ABFD. Section names are not unique - there can be multiple sections of
524 the same name. Also the sections of the same name do not have to be
525 adjacent to each other. Some sections may be present only in one of the
526 files. Even sections present in both files do not have to be in the same
529 Use stable sort by name for the sections in both files. Then linearly
530 scan both lists matching as most of the entries as possible. */
532 std::vector
<const struct other_sections
*> addrs_sorted
533 = addrs_section_sort (*addrs
);
535 section_addr_info abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
536 std::vector
<const struct other_sections
*> abfd_addrs_sorted
537 = addrs_section_sort (abfd_addrs
);
539 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
540 ABFD_ADDRS_SORTED. */
542 std::vector
<const struct other_sections
*>
543 addrs_to_abfd_addrs (addrs
->size (), nullptr);
545 std::vector
<const struct other_sections
*>::iterator abfd_sorted_iter
546 = abfd_addrs_sorted
.begin ();
547 for (const other_sections
*sect
: addrs_sorted
)
549 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
551 while (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
552 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
556 if (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
557 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
562 /* Make the found item directly addressable from ADDRS. */
563 index_in_addrs
= sect
- addrs
->data ();
564 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
565 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_sorted_iter
;
567 /* Never use the same ABFD entry twice. */
572 /* Calculate offsets for the loadable sections.
573 FIXME! Sections must be in order of increasing loadable section
574 so that contiguous sections can use the lower-offset!!!
576 Adjust offsets if the segments are not contiguous.
577 If the section is contiguous, its offset should be set to
578 the offset of the highest loadable section lower than it
579 (the loadable section directly below it in memory).
580 this_offset = lower_offset = lower_addr - lower_orig_addr */
582 for (i
= 0; i
< addrs
->size (); i
++)
584 const struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
588 /* This is the index used by BFD. */
589 (*addrs
)[i
].sectindex
= sect
->sectindex
;
591 if ((*addrs
)[i
].addr
!= 0)
593 (*addrs
)[i
].addr
-= sect
->addr
;
594 lower_offset
= (*addrs
)[i
].addr
;
597 (*addrs
)[i
].addr
= lower_offset
;
601 /* addr_section_name transformation is not used for SECT_NAME. */
602 const std::string
§_name
= (*addrs
)[i
].name
;
604 /* This section does not exist in ABFD, which is normally
605 unexpected and we want to issue a warning.
607 However, the ELF prelinker does create a few sections which are
608 marked in the main executable as loadable (they are loaded in
609 memory from the DYNAMIC segment) and yet are not present in
610 separate debug info files. This is fine, and should not cause
611 a warning. Shared libraries contain just the section
612 ".gnu.liblist" but it is not marked as loadable there. There is
613 no other way to identify them than by their name as the sections
614 created by prelink have no special flags.
616 For the sections `.bss' and `.sbss' see addr_section_name. */
618 if (!(sect_name
== ".gnu.liblist"
619 || sect_name
== ".gnu.conflict"
620 || (sect_name
== ".bss"
622 && (*addrs
)[i
- 1].name
== ".dynbss"
623 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
624 || (sect_name
== ".sbss"
626 && (*addrs
)[i
- 1].name
== ".sdynbss"
627 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
628 warning (_("section %s not found in %s"), sect_name
.c_str (),
629 bfd_get_filename (abfd
));
631 (*addrs
)[i
].addr
= 0;
632 (*addrs
)[i
].sectindex
= -1;
637 /* Parse the user's idea of an offset for dynamic linking, into our idea
638 of how to represent it for fast symbol reading. This is the default
639 version of the sym_fns.sym_offsets function for symbol readers that
640 don't need to do anything special. It allocates a section_offsets table
641 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
644 default_symfile_offsets (struct objfile
*objfile
,
645 const section_addr_info
&addrs
)
647 objfile
->num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
648 objfile
->section_offsets
= (struct section_offsets
*)
649 obstack_alloc (&objfile
->objfile_obstack
,
650 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
651 relative_addr_info_to_section_offsets (objfile
->section_offsets
,
652 objfile
->num_sections
, addrs
);
654 /* For relocatable files, all loadable sections will start at zero.
655 The zero is meaningless, so try to pick arbitrary addresses such
656 that no loadable sections overlap. This algorithm is quadratic,
657 but the number of sections in a single object file is generally
659 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
661 struct place_section_arg arg
;
662 bfd
*abfd
= objfile
->obfd
;
665 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
666 /* We do not expect this to happen; just skip this step if the
667 relocatable file has a section with an assigned VMA. */
668 if (bfd_section_vma (abfd
, cur_sec
) != 0)
673 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
675 /* Pick non-overlapping offsets for sections the user did not
677 arg
.offsets
= objfile
->section_offsets
;
679 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
681 /* Correctly filling in the section offsets is not quite
682 enough. Relocatable files have two properties that
683 (most) shared objects do not:
685 - Their debug information will contain relocations. Some
686 shared libraries do also, but many do not, so this can not
689 - If there are multiple code sections they will be loaded
690 at different relative addresses in memory than they are
691 in the objfile, since all sections in the file will start
694 Because GDB has very limited ability to map from an
695 address in debug info to the correct code section,
696 it relies on adding SECT_OFF_TEXT to things which might be
697 code. If we clear all the section offsets, and set the
698 section VMAs instead, then symfile_relocate_debug_section
699 will return meaningful debug information pointing at the
702 GDB has too many different data structures for section
703 addresses - a bfd, objfile, and so_list all have section
704 tables, as does exec_ops. Some of these could probably
707 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
708 cur_sec
= cur_sec
->next
)
710 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
713 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
714 exec_set_section_address (bfd_get_filename (abfd
),
716 offsets
[cur_sec
->index
]);
717 offsets
[cur_sec
->index
] = 0;
722 /* Remember the bfd indexes for the .text, .data, .bss and
724 init_objfile_sect_indices (objfile
);
727 /* Divide the file into segments, which are individual relocatable units.
728 This is the default version of the sym_fns.sym_segments function for
729 symbol readers that do not have an explicit representation of segments.
730 It assumes that object files do not have segments, and fully linked
731 files have a single segment. */
733 struct symfile_segment_data
*
734 default_symfile_segments (bfd
*abfd
)
738 struct symfile_segment_data
*data
;
741 /* Relocatable files contain enough information to position each
742 loadable section independently; they should not be relocated
744 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
747 /* Make sure there is at least one loadable section in the file. */
748 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
750 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
758 low
= bfd_get_section_vma (abfd
, sect
);
759 high
= low
+ bfd_get_section_size (sect
);
761 data
= XCNEW (struct symfile_segment_data
);
762 data
->num_segments
= 1;
763 data
->segment_bases
= XCNEW (CORE_ADDR
);
764 data
->segment_sizes
= XCNEW (CORE_ADDR
);
766 num_sections
= bfd_count_sections (abfd
);
767 data
->segment_info
= XCNEWVEC (int, num_sections
);
769 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
773 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
776 vma
= bfd_get_section_vma (abfd
, sect
);
779 if (vma
+ bfd_get_section_size (sect
) > high
)
780 high
= vma
+ bfd_get_section_size (sect
);
782 data
->segment_info
[i
] = 1;
785 data
->segment_bases
[0] = low
;
786 data
->segment_sizes
[0] = high
- low
;
791 /* This is a convenience function to call sym_read for OBJFILE and
792 possibly force the partial symbols to be read. */
795 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
797 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
798 objfile
->per_bfd
->minsyms_read
= true;
800 /* find_separate_debug_file_in_section should be called only if there is
801 single binary with no existing separate debug info file. */
802 if (!objfile_has_partial_symbols (objfile
)
803 && objfile
->separate_debug_objfile
== NULL
804 && objfile
->separate_debug_objfile_backlink
== NULL
)
806 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
810 /* find_separate_debug_file_in_section uses the same filename for the
811 virtual section-as-bfd like the bfd filename containing the
812 section. Therefore use also non-canonical name form for the same
813 file containing the section. */
814 symbol_file_add_separate (abfd
.get (),
815 bfd_get_filename (abfd
.get ()),
816 add_flags
| SYMFILE_NOT_FILENAME
, objfile
);
819 if ((add_flags
& SYMFILE_NO_READ
) == 0)
820 require_partial_symbols (objfile
, 0);
823 /* Initialize entry point information for this objfile. */
826 init_entry_point_info (struct objfile
*objfile
)
828 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
834 /* Save startup file's range of PC addresses to help blockframe.c
835 decide where the bottom of the stack is. */
837 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
839 /* Executable file -- record its entry point so we'll recognize
840 the startup file because it contains the entry point. */
841 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
842 ei
->entry_point_p
= 1;
844 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
845 && bfd_get_start_address (objfile
->obfd
) != 0)
847 /* Some shared libraries may have entry points set and be
848 runnable. There's no clear way to indicate this, so just check
849 for values other than zero. */
850 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
851 ei
->entry_point_p
= 1;
855 /* Examination of non-executable.o files. Short-circuit this stuff. */
856 ei
->entry_point_p
= 0;
859 if (ei
->entry_point_p
)
861 struct obj_section
*osect
;
862 CORE_ADDR entry_point
= ei
->entry_point
;
865 /* Make certain that the address points at real code, and not a
866 function descriptor. */
868 = gdbarch_convert_from_func_ptr_addr (get_objfile_arch (objfile
),
870 current_top_target ());
872 /* Remove any ISA markers, so that this matches entries in the
875 = gdbarch_addr_bits_remove (get_objfile_arch (objfile
), entry_point
);
878 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
880 struct bfd_section
*sect
= osect
->the_bfd_section
;
882 if (entry_point
>= bfd_get_section_vma (objfile
->obfd
, sect
)
883 && entry_point
< (bfd_get_section_vma (objfile
->obfd
, sect
)
884 + bfd_get_section_size (sect
)))
886 ei
->the_bfd_section_index
887 = gdb_bfd_section_index (objfile
->obfd
, sect
);
894 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
898 /* Process a symbol file, as either the main file or as a dynamically
901 This function does not set the OBJFILE's entry-point info.
903 OBJFILE is where the symbols are to be read from.
905 ADDRS is the list of section load addresses. If the user has given
906 an 'add-symbol-file' command, then this is the list of offsets and
907 addresses he or she provided as arguments to the command; or, if
908 we're handling a shared library, these are the actual addresses the
909 sections are loaded at, according to the inferior's dynamic linker
910 (as gleaned by GDB's shared library code). We convert each address
911 into an offset from the section VMA's as it appears in the object
912 file, and then call the file's sym_offsets function to convert this
913 into a format-specific offset table --- a `struct section_offsets'.
914 The sectindex field is used to control the ordering of sections
915 with the same name. Upon return, it is updated to contain the
916 correspondig BFD section index, or -1 if the section was not found.
918 ADD_FLAGS encodes verbosity level, whether this is main symbol or
919 an extra symbol file such as dynamically loaded code, and wether
920 breakpoint reset should be deferred. */
923 syms_from_objfile_1 (struct objfile
*objfile
,
924 section_addr_info
*addrs
,
925 symfile_add_flags add_flags
)
927 section_addr_info local_addr
;
928 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
930 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
932 if (objfile
->sf
== NULL
)
934 /* No symbols to load, but we still need to make sure
935 that the section_offsets table is allocated. */
936 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
937 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_sections
);
939 objfile
->num_sections
= num_sections
;
940 objfile
->section_offsets
941 = (struct section_offsets
*) obstack_alloc (&objfile
->objfile_obstack
,
943 memset (objfile
->section_offsets
, 0, size
);
947 /* Make sure that partially constructed symbol tables will be cleaned up
948 if an error occurs during symbol reading. */
949 gdb::optional
<clear_symtab_users_cleanup
> defer_clear_users
;
951 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
953 /* If ADDRS is NULL, put together a dummy address list.
954 We now establish the convention that an addr of zero means
955 no load address was specified. */
961 /* We will modify the main symbol table, make sure that all its users
962 will be cleaned up if an error occurs during symbol reading. */
963 defer_clear_users
.emplace ((symfile_add_flag
) 0);
965 /* Since no error yet, throw away the old symbol table. */
967 if (symfile_objfile
!= NULL
)
969 delete symfile_objfile
;
970 gdb_assert (symfile_objfile
== NULL
);
973 /* Currently we keep symbols from the add-symbol-file command.
974 If the user wants to get rid of them, they should do "symbol-file"
975 without arguments first. Not sure this is the best behavior
978 (*objfile
->sf
->sym_new_init
) (objfile
);
981 /* Convert addr into an offset rather than an absolute address.
982 We find the lowest address of a loaded segment in the objfile,
983 and assume that <addr> is where that got loaded.
985 We no longer warn if the lowest section is not a text segment (as
986 happens for the PA64 port. */
987 if (addrs
->size () > 0)
988 addr_info_make_relative (addrs
, objfile
->obfd
);
990 /* Initialize symbol reading routines for this objfile, allow complaints to
991 appear for this new file, and record how verbose to be, then do the
992 initial symbol reading for this file. */
994 (*objfile
->sf
->sym_init
) (objfile
);
997 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
999 read_symbols (objfile
, add_flags
);
1001 /* Discard cleanups as symbol reading was successful. */
1003 objfile_holder
.release ();
1004 if (defer_clear_users
)
1005 defer_clear_users
->release ();
1008 /* Same as syms_from_objfile_1, but also initializes the objfile
1009 entry-point info. */
1012 syms_from_objfile (struct objfile
*objfile
,
1013 section_addr_info
*addrs
,
1014 symfile_add_flags add_flags
)
1016 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
1017 init_entry_point_info (objfile
);
1020 /* Perform required actions after either reading in the initial
1021 symbols for a new objfile, or mapping in the symbols from a reusable
1022 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
1025 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
1027 /* If this is the main symbol file we have to clean up all users of the
1028 old main symbol file. Otherwise it is sufficient to fixup all the
1029 breakpoints that may have been redefined by this symbol file. */
1030 if (add_flags
& SYMFILE_MAINLINE
)
1032 /* OK, make it the "real" symbol file. */
1033 symfile_objfile
= objfile
;
1035 clear_symtab_users (add_flags
);
1037 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1039 breakpoint_re_set ();
1042 /* We're done reading the symbol file; finish off complaints. */
1043 clear_complaints ();
1046 /* Process a symbol file, as either the main file or as a dynamically
1049 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1050 A new reference is acquired by this function.
1052 For NAME description see the objfile constructor.
1054 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1055 extra, such as dynamically loaded code, and what to do with breakpoins.
1057 ADDRS is as described for syms_from_objfile_1, above.
1058 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1060 PARENT is the original objfile if ABFD is a separate debug info file.
1061 Otherwise PARENT is NULL.
1063 Upon success, returns a pointer to the objfile that was added.
1064 Upon failure, jumps back to command level (never returns). */
1066 static struct objfile
*
1067 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1068 symfile_add_flags add_flags
,
1069 section_addr_info
*addrs
,
1070 objfile_flags flags
, struct objfile
*parent
)
1072 struct objfile
*objfile
;
1073 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1074 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1075 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1076 && (readnow_symbol_files
1077 || (add_flags
& SYMFILE_NO_READ
) == 0));
1079 if (readnow_symbol_files
)
1081 flags
|= OBJF_READNOW
;
1082 add_flags
&= ~SYMFILE_NO_READ
;
1084 else if (readnever_symbol_files
1085 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1087 flags
|= OBJF_READNEVER
;
1088 add_flags
|= SYMFILE_NO_READ
;
1090 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1091 flags
|= OBJF_NOT_FILENAME
;
1093 /* Give user a chance to burp if we'd be
1094 interactively wiping out any existing symbols. */
1096 if ((have_full_symbols () || have_partial_symbols ())
1099 && !query (_("Load new symbol table from \"%s\"? "), name
))
1100 error (_("Not confirmed."));
1103 flags
|= OBJF_MAINLINE
;
1104 objfile
= new struct objfile (abfd
, name
, flags
);
1107 add_separate_debug_objfile (objfile
, parent
);
1109 /* We either created a new mapped symbol table, mapped an existing
1110 symbol table file which has not had initial symbol reading
1111 performed, or need to read an unmapped symbol table. */
1114 if (deprecated_pre_add_symbol_hook
)
1115 deprecated_pre_add_symbol_hook (name
);
1118 puts_filtered (_("Reading symbols from "));
1119 fputs_styled (name
, file_name_style
.style (), gdb_stdout
);
1120 puts_filtered ("...\n");
1123 syms_from_objfile (objfile
, addrs
, add_flags
);
1125 /* We now have at least a partial symbol table. Check to see if the
1126 user requested that all symbols be read on initial access via either
1127 the gdb startup command line or on a per symbol file basis. Expand
1128 all partial symbol tables for this objfile if so. */
1130 if ((flags
& OBJF_READNOW
))
1133 printf_filtered (_("Expanding full symbols from %s...\n"), name
);
1136 objfile
->sf
->qf
->expand_all_symtabs (objfile
);
1139 /* Note that we only print a message if we have no symbols and have
1140 no separate debug file. If there is a separate debug file which
1141 does not have symbols, we'll have emitted this message for that
1142 file, and so printing it twice is just redundant. */
1143 if (should_print
&& !objfile_has_symbols (objfile
)
1144 && objfile
->separate_debug_objfile
== nullptr)
1145 printf_filtered (_("(No debugging symbols found in %s)\n"), name
);
1149 if (deprecated_post_add_symbol_hook
)
1150 deprecated_post_add_symbol_hook ();
1153 /* We print some messages regardless of whether 'from_tty ||
1154 info_verbose' is true, so make sure they go out at the right
1156 gdb_flush (gdb_stdout
);
1158 if (objfile
->sf
== NULL
)
1160 gdb::observers::new_objfile
.notify (objfile
);
1161 return objfile
; /* No symbols. */
1164 finish_new_objfile (objfile
, add_flags
);
1166 gdb::observers::new_objfile
.notify (objfile
);
1168 bfd_cache_close_all ();
1172 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1173 see the objfile constructor. */
1176 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1177 symfile_add_flags symfile_flags
,
1178 struct objfile
*objfile
)
1180 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1181 because sections of BFD may not match sections of OBJFILE and because
1182 vma may have been modified by tools such as prelink. */
1183 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1185 symbol_file_add_with_addrs
1186 (bfd
, name
, symfile_flags
, &sap
,
1187 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1192 /* Process the symbol file ABFD, as either the main file or as a
1193 dynamically loaded file.
1194 See symbol_file_add_with_addrs's comments for details. */
1197 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1198 symfile_add_flags add_flags
,
1199 section_addr_info
*addrs
,
1200 objfile_flags flags
, struct objfile
*parent
)
1202 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1206 /* Process a symbol file, as either the main file or as a dynamically
1207 loaded file. See symbol_file_add_with_addrs's comments for details. */
1210 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1211 section_addr_info
*addrs
, objfile_flags flags
)
1213 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1215 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1219 /* Call symbol_file_add() with default values and update whatever is
1220 affected by the loading of a new main().
1221 Used when the file is supplied in the gdb command line
1222 and by some targets with special loading requirements.
1223 The auxiliary function, symbol_file_add_main_1(), has the flags
1224 argument for the switches that can only be specified in the symbol_file
1228 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1230 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1234 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1235 objfile_flags flags
, CORE_ADDR reloff
)
1237 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1239 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1241 objfile_rebase (objfile
, reloff
);
1243 /* Getting new symbols may change our opinion about
1244 what is frameless. */
1245 reinit_frame_cache ();
1247 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1248 set_initial_language ();
1252 symbol_file_clear (int from_tty
)
1254 if ((have_full_symbols () || have_partial_symbols ())
1257 ? !query (_("Discard symbol table from `%s'? "),
1258 objfile_name (symfile_objfile
))
1259 : !query (_("Discard symbol table? "))))
1260 error (_("Not confirmed."));
1262 /* solib descriptors may have handles to objfiles. Wipe them before their
1263 objfiles get stale by free_all_objfiles. */
1264 no_shared_libraries (NULL
, from_tty
);
1266 free_all_objfiles ();
1268 gdb_assert (symfile_objfile
== NULL
);
1270 printf_filtered (_("No symbol file now.\n"));
1273 /* See symfile.h. */
1275 int separate_debug_file_debug
= 0;
1278 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1279 struct objfile
*parent_objfile
)
1281 unsigned long file_crc
;
1283 struct stat parent_stat
, abfd_stat
;
1284 int verified_as_different
;
1286 /* Find a separate debug info file as if symbols would be present in
1287 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1288 section can contain just the basename of PARENT_OBJFILE without any
1289 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1290 the separate debug infos with the same basename can exist. */
1292 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1295 if (separate_debug_file_debug
)
1297 printf_filtered (_(" Trying %s..."), name
.c_str ());
1298 gdb_flush (gdb_stdout
);
1301 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
, -1));
1305 if (separate_debug_file_debug
)
1306 printf_filtered (_(" no, unable to open.\n"));
1311 /* Verify symlinks were not the cause of filename_cmp name difference above.
1313 Some operating systems, e.g. Windows, do not provide a meaningful
1314 st_ino; they always set it to zero. (Windows does provide a
1315 meaningful st_dev.) Files accessed from gdbservers that do not
1316 support the vFile:fstat packet will also have st_ino set to zero.
1317 Do not indicate a duplicate library in either case. While there
1318 is no guarantee that a system that provides meaningful inode
1319 numbers will never set st_ino to zero, this is merely an
1320 optimization, so we do not need to worry about false negatives. */
1322 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1323 && abfd_stat
.st_ino
!= 0
1324 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1326 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1327 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1329 if (separate_debug_file_debug
)
1330 printf_filtered (_(" no, same file as the objfile.\n"));
1334 verified_as_different
= 1;
1337 verified_as_different
= 0;
1339 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1343 if (separate_debug_file_debug
)
1344 printf_filtered (_(" no, error computing CRC.\n"));
1349 if (crc
!= file_crc
)
1351 unsigned long parent_crc
;
1353 /* If the files could not be verified as different with
1354 bfd_stat then we need to calculate the parent's CRC
1355 to verify whether the files are different or not. */
1357 if (!verified_as_different
)
1359 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1361 if (separate_debug_file_debug
)
1362 printf_filtered (_(" no, error computing CRC.\n"));
1368 if (verified_as_different
|| parent_crc
!= file_crc
)
1369 warning (_("the debug information found in \"%s\""
1370 " does not match \"%s\" (CRC mismatch).\n"),
1371 name
.c_str (), objfile_name (parent_objfile
));
1373 if (separate_debug_file_debug
)
1374 printf_filtered (_(" no, CRC doesn't match.\n"));
1379 if (separate_debug_file_debug
)
1380 printf_filtered (_(" yes!\n"));
1385 char *debug_file_directory
= NULL
;
1387 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1388 struct cmd_list_element
*c
, const char *value
)
1390 fprintf_filtered (file
,
1391 _("The directory where separate debug "
1392 "symbols are searched for is \"%s\".\n"),
1396 #if ! defined (DEBUG_SUBDIRECTORY)
1397 #define DEBUG_SUBDIRECTORY ".debug"
1400 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1401 where the original file resides (may not be the same as
1402 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1403 looking for. CANON_DIR is the "realpath" form of DIR.
1404 DIR must contain a trailing '/'.
1405 Returns the path of the file with separate debug info, or an empty
1409 find_separate_debug_file (const char *dir
,
1410 const char *canon_dir
,
1411 const char *debuglink
,
1412 unsigned long crc32
, struct objfile
*objfile
)
1414 if (separate_debug_file_debug
)
1415 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1416 "%s\n"), objfile_name (objfile
));
1418 /* First try in the same directory as the original file. */
1419 std::string debugfile
= dir
;
1420 debugfile
+= debuglink
;
1422 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1425 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1427 debugfile
+= DEBUG_SUBDIRECTORY
;
1429 debugfile
+= debuglink
;
1431 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1434 /* Then try in the global debugfile directories.
1436 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1437 cause "/..." lookups. */
1439 bool target_prefix
= startswith (dir
, "target:");
1440 const char *dir_notarget
= target_prefix
? dir
+ strlen ("target:") : dir
;
1441 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1442 = dirnames_to_char_ptr_vec (debug_file_directory
);
1444 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1446 debugfile
= target_prefix
? "target:" : "";
1447 debugfile
+= debugdir
.get ();
1449 debugfile
+= dir_notarget
;
1450 debugfile
+= debuglink
;
1452 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1455 if (canon_dir
!= NULL
1456 && filename_ncmp (canon_dir
, gdb_sysroot
,
1457 strlen (gdb_sysroot
)) == 0
1458 && IS_DIR_SEPARATOR (canon_dir
[strlen (gdb_sysroot
)]))
1460 /* If the file is in the sysroot, try using its base path in
1461 the global debugfile directory. */
1462 debugfile
= target_prefix
? "target:" : "";
1463 debugfile
+= debugdir
.get ();
1464 debugfile
+= (canon_dir
+ strlen (gdb_sysroot
));
1466 debugfile
+= debuglink
;
1468 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1471 /* If the file is in the sysroot, try using its base path in
1472 the sysroot's global debugfile directory. */
1473 debugfile
= target_prefix
? "target:" : "";
1474 debugfile
+= gdb_sysroot
;
1475 debugfile
+= debugdir
.get ();
1476 debugfile
+= (canon_dir
+ strlen (gdb_sysroot
));
1478 debugfile
+= debuglink
;
1480 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1486 return std::string ();
1489 /* Modify PATH to contain only "[/]directory/" part of PATH.
1490 If there were no directory separators in PATH, PATH will be empty
1491 string on return. */
1494 terminate_after_last_dir_separator (char *path
)
1498 /* Strip off the final filename part, leaving the directory name,
1499 followed by a slash. The directory can be relative or absolute. */
1500 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1501 if (IS_DIR_SEPARATOR (path
[i
]))
1504 /* If I is -1 then no directory is present there and DIR will be "". */
1508 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1509 Returns pathname, or an empty string. */
1512 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1514 unsigned long crc32
;
1516 gdb::unique_xmalloc_ptr
<char> debuglink
1517 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1519 if (debuglink
== NULL
)
1521 /* There's no separate debug info, hence there's no way we could
1522 load it => no warning. */
1523 return std::string ();
1526 std::string dir
= objfile_name (objfile
);
1527 terminate_after_last_dir_separator (&dir
[0]);
1528 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1530 std::string debugfile
1531 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1532 debuglink
.get (), crc32
, objfile
);
1534 if (debugfile
.empty ())
1536 /* For PR gdb/9538, try again with realpath (if different from the
1541 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1542 && S_ISLNK (st_buf
.st_mode
))
1544 gdb::unique_xmalloc_ptr
<char> symlink_dir
1545 (lrealpath (objfile_name (objfile
)));
1546 if (symlink_dir
!= NULL
)
1548 terminate_after_last_dir_separator (symlink_dir
.get ());
1549 if (dir
!= symlink_dir
.get ())
1551 /* Different directory, so try using it. */
1552 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1565 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1569 validate_readnow_readnever (objfile_flags flags
)
1571 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1572 error (_("-readnow and -readnever cannot be used simultaneously"));
1575 /* This is the symbol-file command. Read the file, analyze its
1576 symbols, and add a struct symtab to a symtab list. The syntax of
1577 the command is rather bizarre:
1579 1. The function buildargv implements various quoting conventions
1580 which are undocumented and have little or nothing in common with
1581 the way things are quoted (or not quoted) elsewhere in GDB.
1583 2. Options are used, which are not generally used in GDB (perhaps
1584 "set mapped on", "set readnow on" would be better)
1586 3. The order of options matters, which is contrary to GNU
1587 conventions (because it is confusing and inconvenient). */
1590 symbol_file_command (const char *args
, int from_tty
)
1596 symbol_file_clear (from_tty
);
1600 objfile_flags flags
= OBJF_USERLOADED
;
1601 symfile_add_flags add_flags
= 0;
1603 bool stop_processing_options
= false;
1604 CORE_ADDR offset
= 0;
1609 add_flags
|= SYMFILE_VERBOSE
;
1611 gdb_argv
built_argv (args
);
1612 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1614 if (stop_processing_options
|| *arg
!= '-')
1619 error (_("Unrecognized argument \"%s\""), arg
);
1621 else if (strcmp (arg
, "-readnow") == 0)
1622 flags
|= OBJF_READNOW
;
1623 else if (strcmp (arg
, "-readnever") == 0)
1624 flags
|= OBJF_READNEVER
;
1625 else if (strcmp (arg
, "-o") == 0)
1627 arg
= built_argv
[++idx
];
1629 error (_("Missing argument to -o"));
1631 offset
= parse_and_eval_address (arg
);
1633 else if (strcmp (arg
, "--") == 0)
1634 stop_processing_options
= true;
1636 error (_("Unrecognized argument \"%s\""), arg
);
1640 error (_("no symbol file name was specified"));
1642 validate_readnow_readnever (flags
);
1644 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1648 /* Set the initial language.
1650 FIXME: A better solution would be to record the language in the
1651 psymtab when reading partial symbols, and then use it (if known) to
1652 set the language. This would be a win for formats that encode the
1653 language in an easily discoverable place, such as DWARF. For
1654 stabs, we can jump through hoops looking for specially named
1655 symbols or try to intuit the language from the specific type of
1656 stabs we find, but we can't do that until later when we read in
1660 set_initial_language (void)
1662 enum language lang
= main_language ();
1664 if (lang
== language_unknown
)
1666 char *name
= main_name ();
1667 struct symbol
*sym
= lookup_symbol (name
, NULL
, VAR_DOMAIN
, NULL
).symbol
;
1670 lang
= SYMBOL_LANGUAGE (sym
);
1673 if (lang
== language_unknown
)
1675 /* Make C the default language */
1679 set_language (lang
);
1680 expected_language
= current_language
; /* Don't warn the user. */
1683 /* Open the file specified by NAME and hand it off to BFD for
1684 preliminary analysis. Return a newly initialized bfd *, which
1685 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1686 absolute). In case of trouble, error() is called. */
1689 symfile_bfd_open (const char *name
)
1693 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1694 if (!is_target_filename (name
))
1696 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1698 /* Look down path for it, allocate 2nd new malloc'd copy. */
1699 desc
= openp (getenv ("PATH"),
1700 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1701 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1702 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1705 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1707 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1708 desc
= openp (getenv ("PATH"),
1709 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1710 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1714 perror_with_name (expanded_name
.get ());
1716 name
= absolute_name
.get ();
1719 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1720 if (sym_bfd
== NULL
)
1721 error (_("`%s': can't open to read symbols: %s."), name
,
1722 bfd_errmsg (bfd_get_error ()));
1724 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1725 bfd_set_cacheable (sym_bfd
.get (), 1);
1727 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1728 error (_("`%s': can't read symbols: %s."), name
,
1729 bfd_errmsg (bfd_get_error ()));
1734 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1735 the section was not found. */
1738 get_section_index (struct objfile
*objfile
, const char *section_name
)
1740 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1748 /* Link SF into the global symtab_fns list.
1749 FLAVOUR is the file format that SF handles.
1750 Called on startup by the _initialize routine in each object file format
1751 reader, to register information about each format the reader is prepared
1755 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1757 symtab_fns
.emplace_back (flavour
, sf
);
1760 /* Initialize OBJFILE to read symbols from its associated BFD. It
1761 either returns or calls error(). The result is an initialized
1762 struct sym_fns in the objfile structure, that contains cached
1763 information about the symbol file. */
1765 static const struct sym_fns
*
1766 find_sym_fns (bfd
*abfd
)
1768 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1770 if (our_flavour
== bfd_target_srec_flavour
1771 || our_flavour
== bfd_target_ihex_flavour
1772 || our_flavour
== bfd_target_tekhex_flavour
)
1773 return NULL
; /* No symbols. */
1775 for (const registered_sym_fns
&rsf
: symtab_fns
)
1776 if (our_flavour
== rsf
.sym_flavour
)
1779 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1780 bfd_get_target (abfd
));
1784 /* This function runs the load command of our current target. */
1787 load_command (const char *arg
, int from_tty
)
1791 /* The user might be reloading because the binary has changed. Take
1792 this opportunity to check. */
1793 reopen_exec_file ();
1799 const char *parg
, *prev
;
1801 arg
= get_exec_file (1);
1803 /* We may need to quote this string so buildargv can pull it
1806 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1808 temp
.append (prev
, parg
- prev
);
1810 temp
.push_back ('\\');
1812 /* If we have not copied anything yet, then we didn't see a
1813 character to quote, and we can just leave ARG unchanged. */
1817 arg
= temp
.c_str ();
1821 target_load (arg
, from_tty
);
1823 /* After re-loading the executable, we don't really know which
1824 overlays are mapped any more. */
1825 overlay_cache_invalid
= 1;
1828 /* This version of "load" should be usable for any target. Currently
1829 it is just used for remote targets, not inftarg.c or core files,
1830 on the theory that only in that case is it useful.
1832 Avoiding xmodem and the like seems like a win (a) because we don't have
1833 to worry about finding it, and (b) On VMS, fork() is very slow and so
1834 we don't want to run a subprocess. On the other hand, I'm not sure how
1835 performance compares. */
1837 static int validate_download
= 0;
1839 /* Callback service function for generic_load (bfd_map_over_sections). */
1842 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1844 bfd_size_type
*sum
= (bfd_size_type
*) data
;
1846 *sum
+= bfd_get_section_size (asec
);
1849 /* Opaque data for load_progress. */
1850 struct load_progress_data
1852 /* Cumulative data. */
1853 unsigned long write_count
= 0;
1854 unsigned long data_count
= 0;
1855 bfd_size_type total_size
= 0;
1858 /* Opaque data for load_progress for a single section. */
1859 struct load_progress_section_data
1861 load_progress_section_data (load_progress_data
*cumulative_
,
1862 const char *section_name_
, ULONGEST section_size_
,
1863 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1864 : cumulative (cumulative_
), section_name (section_name_
),
1865 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1868 struct load_progress_data
*cumulative
;
1870 /* Per-section data. */
1871 const char *section_name
;
1872 ULONGEST section_sent
= 0;
1873 ULONGEST section_size
;
1878 /* Opaque data for load_section_callback. */
1879 struct load_section_data
1881 load_section_data (load_progress_data
*progress_data_
)
1882 : progress_data (progress_data_
)
1885 ~load_section_data ()
1887 for (auto &&request
: requests
)
1889 xfree (request
.data
);
1890 delete ((load_progress_section_data
*) request
.baton
);
1894 CORE_ADDR load_offset
= 0;
1895 struct load_progress_data
*progress_data
;
1896 std::vector
<struct memory_write_request
> requests
;
1899 /* Target write callback routine for progress reporting. */
1902 load_progress (ULONGEST bytes
, void *untyped_arg
)
1904 struct load_progress_section_data
*args
1905 = (struct load_progress_section_data
*) untyped_arg
;
1906 struct load_progress_data
*totals
;
1909 /* Writing padding data. No easy way to get at the cumulative
1910 stats, so just ignore this. */
1913 totals
= args
->cumulative
;
1915 if (bytes
== 0 && args
->section_sent
== 0)
1917 /* The write is just starting. Let the user know we've started
1919 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1921 hex_string (args
->section_size
),
1922 paddress (target_gdbarch (), args
->lma
));
1926 if (validate_download
)
1928 /* Broken memories and broken monitors manifest themselves here
1929 when bring new computers to life. This doubles already slow
1931 /* NOTE: cagney/1999-10-18: A more efficient implementation
1932 might add a verify_memory() method to the target vector and
1933 then use that. remote.c could implement that method using
1934 the ``qCRC'' packet. */
1935 gdb::byte_vector
check (bytes
);
1937 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1938 error (_("Download verify read failed at %s"),
1939 paddress (target_gdbarch (), args
->lma
));
1940 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1941 error (_("Download verify compare failed at %s"),
1942 paddress (target_gdbarch (), args
->lma
));
1944 totals
->data_count
+= bytes
;
1946 args
->buffer
+= bytes
;
1947 totals
->write_count
+= 1;
1948 args
->section_sent
+= bytes
;
1949 if (check_quit_flag ()
1950 || (deprecated_ui_load_progress_hook
!= NULL
1951 && deprecated_ui_load_progress_hook (args
->section_name
,
1952 args
->section_sent
)))
1953 error (_("Canceled the download"));
1955 if (deprecated_show_load_progress
!= NULL
)
1956 deprecated_show_load_progress (args
->section_name
,
1960 totals
->total_size
);
1963 /* Callback service function for generic_load (bfd_map_over_sections). */
1966 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1968 struct load_section_data
*args
= (struct load_section_data
*) data
;
1969 bfd_size_type size
= bfd_get_section_size (asec
);
1970 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1972 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1978 ULONGEST begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1979 ULONGEST end
= begin
+ size
;
1980 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1981 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1983 load_progress_section_data
*section_data
1984 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
1987 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
1990 static void print_transfer_performance (struct ui_file
*stream
,
1991 unsigned long data_count
,
1992 unsigned long write_count
,
1993 std::chrono::steady_clock::duration d
);
1996 generic_load (const char *args
, int from_tty
)
1998 struct load_progress_data total_progress
;
1999 struct load_section_data
cbdata (&total_progress
);
2000 struct ui_out
*uiout
= current_uiout
;
2003 error_no_arg (_("file to load"));
2005 gdb_argv
argv (args
);
2007 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2009 if (argv
[1] != NULL
)
2013 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2015 /* If the last word was not a valid number then
2016 treat it as a file name with spaces in. */
2017 if (argv
[1] == endptr
)
2018 error (_("Invalid download offset:%s."), argv
[1]);
2020 if (argv
[2] != NULL
)
2021 error (_("Too many parameters."));
2024 /* Open the file for loading. */
2025 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
, -1));
2026 if (loadfile_bfd
== NULL
)
2027 perror_with_name (filename
.get ());
2029 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2031 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2032 bfd_errmsg (bfd_get_error ()));
2035 bfd_map_over_sections (loadfile_bfd
.get (), add_section_size_callback
,
2036 (void *) &total_progress
.total_size
);
2038 bfd_map_over_sections (loadfile_bfd
.get (), load_section_callback
, &cbdata
);
2040 using namespace std::chrono
;
2042 steady_clock::time_point start_time
= steady_clock::now ();
2044 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2045 load_progress
) != 0)
2046 error (_("Load failed"));
2048 steady_clock::time_point end_time
= steady_clock::now ();
2050 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2051 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2052 uiout
->text ("Start address ");
2053 uiout
->field_fmt ("address", "%s", paddress (target_gdbarch (), entry
));
2054 uiout
->text (", load size ");
2055 uiout
->field_fmt ("load-size", "%lu", total_progress
.data_count
);
2057 regcache_write_pc (get_current_regcache (), entry
);
2059 /* Reset breakpoints, now that we have changed the load image. For
2060 instance, breakpoints may have been set (or reset, by
2061 post_create_inferior) while connected to the target but before we
2062 loaded the program. In that case, the prologue analyzer could
2063 have read instructions from the target to find the right
2064 breakpoint locations. Loading has changed the contents of that
2067 breakpoint_re_set ();
2069 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2070 total_progress
.write_count
,
2071 end_time
- start_time
);
2074 /* Report on STREAM the performance of a memory transfer operation,
2075 such as 'load'. DATA_COUNT is the number of bytes transferred.
2076 WRITE_COUNT is the number of separate write operations, or 0, if
2077 that information is not available. TIME is how long the operation
2081 print_transfer_performance (struct ui_file
*stream
,
2082 unsigned long data_count
,
2083 unsigned long write_count
,
2084 std::chrono::steady_clock::duration time
)
2086 using namespace std::chrono
;
2087 struct ui_out
*uiout
= current_uiout
;
2089 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2091 uiout
->text ("Transfer rate: ");
2092 if (ms
.count () > 0)
2094 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2096 if (uiout
->is_mi_like_p ())
2098 uiout
->field_fmt ("transfer-rate", "%lu", rate
* 8);
2099 uiout
->text (" bits/sec");
2101 else if (rate
< 1024)
2103 uiout
->field_fmt ("transfer-rate", "%lu", rate
);
2104 uiout
->text (" bytes/sec");
2108 uiout
->field_fmt ("transfer-rate", "%lu", rate
/ 1024);
2109 uiout
->text (" KB/sec");
2114 uiout
->field_fmt ("transferred-bits", "%lu", (data_count
* 8));
2115 uiout
->text (" bits in <1 sec");
2117 if (write_count
> 0)
2120 uiout
->field_fmt ("write-rate", "%lu", data_count
/ write_count
);
2121 uiout
->text (" bytes/write");
2123 uiout
->text (".\n");
2126 /* Add an OFFSET to the start address of each section in OBJF, except
2127 sections that were specified in ADDRS. */
2130 set_objfile_default_section_offset (struct objfile
*objf
,
2131 const section_addr_info
&addrs
,
2134 /* Add OFFSET to all sections by default. */
2135 std::vector
<struct section_offsets
> offsets (objf
->num_sections
,
2138 /* Create sorted lists of all sections in ADDRS as well as all
2139 sections in OBJF. */
2141 std::vector
<const struct other_sections
*> addrs_sorted
2142 = addrs_section_sort (addrs
);
2144 section_addr_info objf_addrs
2145 = build_section_addr_info_from_objfile (objf
);
2146 std::vector
<const struct other_sections
*> objf_addrs_sorted
2147 = addrs_section_sort (objf_addrs
);
2149 /* Walk the BFD section list, and if a matching section is found in
2150 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2153 Note that both lists may contain multiple sections with the same
2154 name, and then the sections from ADDRS are matched in BFD order
2155 (thanks to sectindex). */
2157 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2158 = addrs_sorted
.begin ();
2159 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2161 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2164 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2166 const struct other_sections
*sect
= *addrs_sorted_iter
;
2167 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2168 cmp
= strcmp (sect_name
, objf_name
);
2170 ++addrs_sorted_iter
;
2174 offsets
[objf_sect
->sectindex
].offsets
[0] = 0;
2177 /* Apply the new section offsets. */
2178 objfile_relocate (objf
, offsets
.data ());
2181 /* This function allows the addition of incrementally linked object files.
2182 It does not modify any state in the target, only in the debugger. */
2183 /* Note: ezannoni 2000-04-13 This function/command used to have a
2184 special case syntax for the rombug target (Rombug is the boot
2185 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2186 rombug case, the user doesn't need to supply a text address,
2187 instead a call to target_link() (in target.c) would supply the
2188 value to use. We are now discontinuing this type of ad hoc syntax. */
2191 add_symbol_file_command (const char *args
, int from_tty
)
2193 struct gdbarch
*gdbarch
= get_current_arch ();
2194 gdb::unique_xmalloc_ptr
<char> filename
;
2197 struct objfile
*objf
;
2198 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2199 symfile_add_flags add_flags
= 0;
2202 add_flags
|= SYMFILE_VERBOSE
;
2210 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2211 bool stop_processing_options
= false;
2212 CORE_ADDR offset
= 0;
2217 error (_("add-symbol-file takes a file name and an address"));
2219 bool seen_addr
= false;
2220 bool seen_offset
= false;
2221 gdb_argv
argv (args
);
2223 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2225 if (stop_processing_options
|| *arg
!= '-')
2227 if (filename
== NULL
)
2229 /* First non-option argument is always the filename. */
2230 filename
.reset (tilde_expand (arg
));
2232 else if (!seen_addr
)
2234 /* The second non-option argument is always the text
2235 address at which to load the program. */
2236 sect_opts
[0].value
= arg
;
2240 error (_("Unrecognized argument \"%s\""), arg
);
2242 else if (strcmp (arg
, "-readnow") == 0)
2243 flags
|= OBJF_READNOW
;
2244 else if (strcmp (arg
, "-readnever") == 0)
2245 flags
|= OBJF_READNEVER
;
2246 else if (strcmp (arg
, "-s") == 0)
2248 if (argv
[argcnt
+ 1] == NULL
)
2249 error (_("Missing section name after \"-s\""));
2250 else if (argv
[argcnt
+ 2] == NULL
)
2251 error (_("Missing section address after \"-s\""));
2253 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2255 sect_opts
.push_back (sect
);
2258 else if (strcmp (arg
, "-o") == 0)
2260 arg
= argv
[++argcnt
];
2262 error (_("Missing argument to -o"));
2264 offset
= parse_and_eval_address (arg
);
2267 else if (strcmp (arg
, "--") == 0)
2268 stop_processing_options
= true;
2270 error (_("Unrecognized argument \"%s\""), arg
);
2273 if (filename
== NULL
)
2274 error (_("You must provide a filename to be loaded."));
2276 validate_readnow_readnever (flags
);
2278 /* Print the prompt for the query below. And save the arguments into
2279 a sect_addr_info structure to be passed around to other
2280 functions. We have to split this up into separate print
2281 statements because hex_string returns a local static
2284 printf_unfiltered (_("add symbol table from file \"%s\""),
2286 section_addr_info section_addrs
;
2287 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2290 for (; it
!= sect_opts
.end (); ++it
)
2293 const char *val
= it
->value
;
2294 const char *sec
= it
->name
;
2296 if (section_addrs
.empty ())
2297 printf_unfiltered (_(" at\n"));
2298 addr
= parse_and_eval_address (val
);
2300 /* Here we store the section offsets in the order they were
2301 entered on the command line. Every array element is
2302 assigned an ascending section index to preserve the above
2303 order over an unstable sorting algorithm. This dummy
2304 index is not used for any other purpose.
2306 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2307 printf_filtered ("\t%s_addr = %s\n", sec
,
2308 paddress (gdbarch
, addr
));
2310 /* The object's sections are initialized when a
2311 call is made to build_objfile_section_table (objfile).
2312 This happens in reread_symbols.
2313 At this point, we don't know what file type this is,
2314 so we can't determine what section names are valid. */
2317 printf_unfiltered (_("%s offset by %s\n"),
2318 (section_addrs
.empty ()
2319 ? _(" with all sections")
2320 : _("with other sections")),
2321 paddress (gdbarch
, offset
));
2322 else if (section_addrs
.empty ())
2323 printf_unfiltered ("\n");
2325 if (from_tty
&& (!query ("%s", "")))
2326 error (_("Not confirmed."));
2328 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2332 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2334 add_target_sections_of_objfile (objf
);
2336 /* Getting new symbols may change our opinion about what is
2338 reinit_frame_cache ();
2342 /* This function removes a symbol file that was added via add-symbol-file. */
2345 remove_symbol_file_command (const char *args
, int from_tty
)
2347 struct objfile
*objf
= NULL
;
2348 struct program_space
*pspace
= current_program_space
;
2353 error (_("remove-symbol-file: no symbol file provided"));
2355 gdb_argv
argv (args
);
2357 if (strcmp (argv
[0], "-a") == 0)
2359 /* Interpret the next argument as an address. */
2362 if (argv
[1] == NULL
)
2363 error (_("Missing address argument"));
2365 if (argv
[2] != NULL
)
2366 error (_("Junk after %s"), argv
[1]);
2368 addr
= parse_and_eval_address (argv
[1]);
2370 for (objfile
*objfile
: current_program_space
->objfiles ())
2372 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2373 && (objfile
->flags
& OBJF_SHARED
) != 0
2374 && objfile
->pspace
== pspace
2375 && is_addr_in_objfile (addr
, objfile
))
2382 else if (argv
[0] != NULL
)
2384 /* Interpret the current argument as a file name. */
2386 if (argv
[1] != NULL
)
2387 error (_("Junk after %s"), argv
[0]);
2389 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2391 for (objfile
*objfile
: current_program_space
->objfiles ())
2393 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2394 && (objfile
->flags
& OBJF_SHARED
) != 0
2395 && objfile
->pspace
== pspace
2396 && filename_cmp (filename
.get (), objfile_name (objfile
)) == 0)
2405 error (_("No symbol file found"));
2408 && !query (_("Remove symbol table from file \"%s\"? "),
2409 objfile_name (objf
)))
2410 error (_("Not confirmed."));
2413 clear_symtab_users (0);
2416 /* Re-read symbols if a symbol-file has changed. */
2419 reread_symbols (void)
2421 struct objfile
*objfile
;
2423 struct stat new_statbuf
;
2425 std::vector
<struct objfile
*> new_objfiles
;
2427 /* With the addition of shared libraries, this should be modified,
2428 the load time should be saved in the partial symbol tables, since
2429 different tables may come from different source files. FIXME.
2430 This routine should then walk down each partial symbol table
2431 and see if the symbol table that it originates from has been changed. */
2433 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2435 if (objfile
->obfd
== NULL
)
2438 /* Separate debug objfiles are handled in the main objfile. */
2439 if (objfile
->separate_debug_objfile_backlink
)
2442 /* If this object is from an archive (what you usually create with
2443 `ar', often called a `static library' on most systems, though
2444 a `shared library' on AIX is also an archive), then you should
2445 stat on the archive name, not member name. */
2446 if (objfile
->obfd
->my_archive
)
2447 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2449 res
= stat (objfile_name (objfile
), &new_statbuf
);
2452 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2453 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2454 objfile_name (objfile
));
2457 new_modtime
= new_statbuf
.st_mtime
;
2458 if (new_modtime
!= objfile
->mtime
)
2460 struct section_offsets
*offsets
;
2463 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2464 objfile_name (objfile
));
2466 /* There are various functions like symbol_file_add,
2467 symfile_bfd_open, syms_from_objfile, etc., which might
2468 appear to do what we want. But they have various other
2469 effects which we *don't* want. So we just do stuff
2470 ourselves. We don't worry about mapped files (for one thing,
2471 any mapped file will be out of date). */
2473 /* If we get an error, blow away this objfile (not sure if
2474 that is the correct response for things like shared
2476 std::unique_ptr
<struct objfile
> objfile_holder (objfile
);
2478 /* We need to do this whenever any symbols go away. */
2479 clear_symtab_users_cleanup
defer_clear_users (0);
2481 if (exec_bfd
!= NULL
2482 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2483 bfd_get_filename (exec_bfd
)) == 0)
2485 /* Reload EXEC_BFD without asking anything. */
2487 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2490 /* Keep the calls order approx. the same as in free_objfile. */
2492 /* Free the separate debug objfiles. It will be
2493 automatically recreated by sym_read. */
2494 free_objfile_separate_debug (objfile
);
2496 /* Remove any references to this objfile in the global
2498 preserve_values (objfile
);
2500 /* Nuke all the state that we will re-read. Much of the following
2501 code which sets things to NULL really is necessary to tell
2502 other parts of GDB that there is nothing currently there.
2504 Try to keep the freeing order compatible with free_objfile. */
2506 if (objfile
->sf
!= NULL
)
2508 (*objfile
->sf
->sym_finish
) (objfile
);
2511 clear_objfile_data (objfile
);
2513 /* Clean up any state BFD has sitting around. */
2515 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2516 char *obfd_filename
;
2518 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2519 /* Open the new BFD before freeing the old one, so that
2520 the filename remains live. */
2521 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
, -1));
2522 objfile
->obfd
= temp
.release ();
2523 if (objfile
->obfd
== NULL
)
2524 error (_("Can't open %s to read symbols."), obfd_filename
);
2527 std::string original_name
= objfile
->original_name
;
2529 /* bfd_openr sets cacheable to true, which is what we want. */
2530 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2531 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2532 bfd_errmsg (bfd_get_error ()));
2534 /* Save the offsets, we will nuke them with the rest of the
2536 num_offsets
= objfile
->num_sections
;
2537 offsets
= ((struct section_offsets
*)
2538 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2539 memcpy (offsets
, objfile
->section_offsets
,
2540 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2542 objfile
->reset_psymtabs ();
2544 /* NB: after this call to obstack_free, objfiles_changed
2545 will need to be called (see discussion below). */
2546 obstack_free (&objfile
->objfile_obstack
, 0);
2547 objfile
->sections
= NULL
;
2548 objfile
->compunit_symtabs
= NULL
;
2549 objfile
->template_symbols
= NULL
;
2550 objfile
->static_links
= NULL
;
2552 /* obstack_init also initializes the obstack so it is
2553 empty. We could use obstack_specify_allocation but
2554 gdb_obstack.h specifies the alloc/dealloc functions. */
2555 obstack_init (&objfile
->objfile_obstack
);
2557 /* set_objfile_per_bfd potentially allocates the per-bfd
2558 data on the objfile's obstack (if sharing data across
2559 multiple users is not possible), so it's important to
2560 do it *after* the obstack has been initialized. */
2561 set_objfile_per_bfd (objfile
);
2563 objfile
->original_name
2564 = (char *) obstack_copy0 (&objfile
->objfile_obstack
,
2565 original_name
.c_str (),
2566 original_name
.size ());
2568 /* Reset the sym_fns pointer. The ELF reader can change it
2569 based on whether .gdb_index is present, and we need it to
2570 start over. PR symtab/15885 */
2571 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2573 build_objfile_section_table (objfile
);
2574 terminate_minimal_symbol_table (objfile
);
2576 /* We use the same section offsets as from last time. I'm not
2577 sure whether that is always correct for shared libraries. */
2578 objfile
->section_offsets
= (struct section_offsets
*)
2579 obstack_alloc (&objfile
->objfile_obstack
,
2580 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2581 memcpy (objfile
->section_offsets
, offsets
,
2582 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2583 objfile
->num_sections
= num_offsets
;
2585 /* What the hell is sym_new_init for, anyway? The concept of
2586 distinguishing between the main file and additional files
2587 in this way seems rather dubious. */
2588 if (objfile
== symfile_objfile
)
2590 (*objfile
->sf
->sym_new_init
) (objfile
);
2593 (*objfile
->sf
->sym_init
) (objfile
);
2594 clear_complaints ();
2596 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2598 /* We are about to read new symbols and potentially also
2599 DWARF information. Some targets may want to pass addresses
2600 read from DWARF DIE's through an adjustment function before
2601 saving them, like MIPS, which may call into
2602 "find_pc_section". When called, that function will make
2603 use of per-objfile program space data.
2605 Since we discarded our section information above, we have
2606 dangling pointers in the per-objfile program space data
2607 structure. Force GDB to update the section mapping
2608 information by letting it know the objfile has changed,
2609 making the dangling pointers point to correct data
2612 objfiles_changed ();
2614 read_symbols (objfile
, 0);
2616 if (!objfile_has_symbols (objfile
))
2619 printf_filtered (_("(no debugging symbols found)\n"));
2623 /* We're done reading the symbol file; finish off complaints. */
2624 clear_complaints ();
2626 /* Getting new symbols may change our opinion about what is
2629 reinit_frame_cache ();
2631 /* Discard cleanups as symbol reading was successful. */
2632 objfile_holder
.release ();
2633 defer_clear_users
.release ();
2635 /* If the mtime has changed between the time we set new_modtime
2636 and now, we *want* this to be out of date, so don't call stat
2638 objfile
->mtime
= new_modtime
;
2639 init_entry_point_info (objfile
);
2641 new_objfiles
.push_back (objfile
);
2645 if (!new_objfiles
.empty ())
2647 clear_symtab_users (0);
2649 /* clear_objfile_data for each objfile was called before freeing it and
2650 gdb::observers::new_objfile.notify (NULL) has been called by
2651 clear_symtab_users above. Notify the new files now. */
2652 for (auto iter
: new_objfiles
)
2653 gdb::observers::new_objfile
.notify (iter
);
2655 /* At least one objfile has changed, so we can consider that
2656 the executable we're debugging has changed too. */
2657 gdb::observers::executable_changed
.notify ();
2662 struct filename_language
2664 filename_language (const std::string
&ext_
, enum language lang_
)
2665 : ext (ext_
), lang (lang_
)
2672 static std::vector
<filename_language
> filename_language_table
;
2674 /* See symfile.h. */
2677 add_filename_language (const char *ext
, enum language lang
)
2679 filename_language_table
.emplace_back (ext
, lang
);
2682 static char *ext_args
;
2684 show_ext_args (struct ui_file
*file
, int from_tty
,
2685 struct cmd_list_element
*c
, const char *value
)
2687 fprintf_filtered (file
,
2688 _("Mapping between filename extension "
2689 "and source language is \"%s\".\n"),
2694 set_ext_lang_command (const char *args
,
2695 int from_tty
, struct cmd_list_element
*e
)
2697 char *cp
= ext_args
;
2700 /* First arg is filename extension, starting with '.' */
2702 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2704 /* Find end of first arg. */
2705 while (*cp
&& !isspace (*cp
))
2709 error (_("'%s': two arguments required -- "
2710 "filename extension and language"),
2713 /* Null-terminate first arg. */
2716 /* Find beginning of second arg, which should be a source language. */
2717 cp
= skip_spaces (cp
);
2720 error (_("'%s': two arguments required -- "
2721 "filename extension and language"),
2724 /* Lookup the language from among those we know. */
2725 lang
= language_enum (cp
);
2727 auto it
= filename_language_table
.begin ();
2728 /* Now lookup the filename extension: do we already know it? */
2729 for (; it
!= filename_language_table
.end (); it
++)
2731 if (it
->ext
== ext_args
)
2735 if (it
== filename_language_table
.end ())
2737 /* New file extension. */
2738 add_filename_language (ext_args
, lang
);
2742 /* Redefining a previously known filename extension. */
2745 /* query ("Really make files of type %s '%s'?", */
2746 /* ext_args, language_str (lang)); */
2753 info_ext_lang_command (const char *args
, int from_tty
)
2755 printf_filtered (_("Filename extensions and the languages they represent:"));
2756 printf_filtered ("\n\n");
2757 for (const filename_language
&entry
: filename_language_table
)
2758 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2759 language_str (entry
.lang
));
2763 deduce_language_from_filename (const char *filename
)
2767 if (filename
!= NULL
)
2768 if ((cp
= strrchr (filename
, '.')) != NULL
)
2770 for (const filename_language
&entry
: filename_language_table
)
2771 if (entry
.ext
== cp
)
2775 return language_unknown
;
2778 /* Allocate and initialize a new symbol table.
2779 CUST is from the result of allocate_compunit_symtab. */
2782 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2784 struct objfile
*objfile
= cust
->objfile
;
2785 struct symtab
*symtab
2786 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2789 = (const char *) bcache (filename
, strlen (filename
) + 1,
2790 objfile
->per_bfd
->filename_cache
);
2791 symtab
->fullname
= NULL
;
2792 symtab
->language
= deduce_language_from_filename (filename
);
2794 /* This can be very verbose with lots of headers.
2795 Only print at higher debug levels. */
2796 if (symtab_create_debug
>= 2)
2798 /* Be a bit clever with debugging messages, and don't print objfile
2799 every time, only when it changes. */
2800 static char *last_objfile_name
= NULL
;
2802 if (last_objfile_name
== NULL
2803 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2805 xfree (last_objfile_name
);
2806 last_objfile_name
= xstrdup (objfile_name (objfile
));
2807 fprintf_filtered (gdb_stdlog
,
2808 "Creating one or more symtabs for objfile %s ...\n",
2811 fprintf_filtered (gdb_stdlog
,
2812 "Created symtab %s for module %s.\n",
2813 host_address_to_string (symtab
), filename
);
2816 /* Add it to CUST's list of symtabs. */
2817 if (cust
->filetabs
== NULL
)
2819 cust
->filetabs
= symtab
;
2820 cust
->last_filetab
= symtab
;
2824 cust
->last_filetab
->next
= symtab
;
2825 cust
->last_filetab
= symtab
;
2828 /* Backlink to the containing compunit symtab. */
2829 symtab
->compunit_symtab
= cust
;
2834 /* Allocate and initialize a new compunit.
2835 NAME is the name of the main source file, if there is one, or some
2836 descriptive text if there are no source files. */
2838 struct compunit_symtab
*
2839 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2841 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2842 struct compunit_symtab
);
2843 const char *saved_name
;
2845 cu
->objfile
= objfile
;
2847 /* The name we record here is only for display/debugging purposes.
2848 Just save the basename to avoid path issues (too long for display,
2849 relative vs absolute, etc.). */
2850 saved_name
= lbasename (name
);
2852 = (const char *) obstack_copy0 (&objfile
->objfile_obstack
, saved_name
,
2853 strlen (saved_name
));
2855 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2857 if (symtab_create_debug
)
2859 fprintf_filtered (gdb_stdlog
,
2860 "Created compunit symtab %s for %s.\n",
2861 host_address_to_string (cu
),
2868 /* Hook CU to the objfile it comes from. */
2871 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2873 cu
->next
= cu
->objfile
->compunit_symtabs
;
2874 cu
->objfile
->compunit_symtabs
= cu
;
2878 /* Reset all data structures in gdb which may contain references to
2879 symbol table data. */
2882 clear_symtab_users (symfile_add_flags add_flags
)
2884 /* Someday, we should do better than this, by only blowing away
2885 the things that really need to be blown. */
2887 /* Clear the "current" symtab first, because it is no longer valid.
2888 breakpoint_re_set may try to access the current symtab. */
2889 clear_current_source_symtab_and_line ();
2892 clear_last_displayed_sal ();
2893 clear_pc_function_cache ();
2894 gdb::observers::new_objfile
.notify (NULL
);
2896 /* Clear globals which might have pointed into a removed objfile.
2897 FIXME: It's not clear which of these are supposed to persist
2898 between expressions and which ought to be reset each time. */
2899 expression_context_block
= NULL
;
2900 innermost_block
.reset ();
2902 /* Varobj may refer to old symbols, perform a cleanup. */
2903 varobj_invalidate ();
2905 /* Now that the various caches have been cleared, we can re_set
2906 our breakpoints without risking it using stale data. */
2907 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2908 breakpoint_re_set ();
2912 The following code implements an abstraction for debugging overlay sections.
2914 The target model is as follows:
2915 1) The gnu linker will permit multiple sections to be mapped into the
2916 same VMA, each with its own unique LMA (or load address).
2917 2) It is assumed that some runtime mechanism exists for mapping the
2918 sections, one by one, from the load address into the VMA address.
2919 3) This code provides a mechanism for gdb to keep track of which
2920 sections should be considered to be mapped from the VMA to the LMA.
2921 This information is used for symbol lookup, and memory read/write.
2922 For instance, if a section has been mapped then its contents
2923 should be read from the VMA, otherwise from the LMA.
2925 Two levels of debugger support for overlays are available. One is
2926 "manual", in which the debugger relies on the user to tell it which
2927 overlays are currently mapped. This level of support is
2928 implemented entirely in the core debugger, and the information about
2929 whether a section is mapped is kept in the objfile->obj_section table.
2931 The second level of support is "automatic", and is only available if
2932 the target-specific code provides functionality to read the target's
2933 overlay mapping table, and translate its contents for the debugger
2934 (by updating the mapped state information in the obj_section tables).
2936 The interface is as follows:
2938 overlay map <name> -- tell gdb to consider this section mapped
2939 overlay unmap <name> -- tell gdb to consider this section unmapped
2940 overlay list -- list the sections that GDB thinks are mapped
2941 overlay read-target -- get the target's state of what's mapped
2942 overlay off/manual/auto -- set overlay debugging state
2943 Functional interface:
2944 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2945 section, return that section.
2946 find_pc_overlay(pc): find any overlay section that contains
2947 the pc, either in its VMA or its LMA
2948 section_is_mapped(sect): true if overlay is marked as mapped
2949 section_is_overlay(sect): true if section's VMA != LMA
2950 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2951 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2952 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2953 overlay_mapped_address(...): map an address from section's LMA to VMA
2954 overlay_unmapped_address(...): map an address from section's VMA to LMA
2955 symbol_overlayed_address(...): Return a "current" address for symbol:
2956 either in VMA or LMA depending on whether
2957 the symbol's section is currently mapped. */
2959 /* Overlay debugging state: */
2961 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2962 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2964 /* Function: section_is_overlay (SECTION)
2965 Returns true if SECTION has VMA not equal to LMA, ie.
2966 SECTION is loaded at an address different from where it will "run". */
2969 section_is_overlay (struct obj_section
*section
)
2971 if (overlay_debugging
&& section
)
2973 asection
*bfd_section
= section
->the_bfd_section
;
2975 if (bfd_section_lma (abfd
, bfd_section
) != 0
2976 && bfd_section_lma (abfd
, bfd_section
)
2977 != bfd_section_vma (abfd
, bfd_section
))
2984 /* Function: overlay_invalidate_all (void)
2985 Invalidate the mapped state of all overlay sections (mark it as stale). */
2988 overlay_invalidate_all (void)
2990 struct obj_section
*sect
;
2992 for (objfile
*objfile
: current_program_space
->objfiles ())
2993 ALL_OBJFILE_OSECTIONS (objfile
, sect
)
2994 if (section_is_overlay (sect
))
2995 sect
->ovly_mapped
= -1;
2998 /* Function: section_is_mapped (SECTION)
2999 Returns true if section is an overlay, and is currently mapped.
3001 Access to the ovly_mapped flag is restricted to this function, so
3002 that we can do automatic update. If the global flag
3003 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3004 overlay_invalidate_all. If the mapped state of the particular
3005 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3008 section_is_mapped (struct obj_section
*osect
)
3010 struct gdbarch
*gdbarch
;
3012 if (osect
== 0 || !section_is_overlay (osect
))
3015 switch (overlay_debugging
)
3019 return 0; /* overlay debugging off */
3020 case ovly_auto
: /* overlay debugging automatic */
3021 /* Unles there is a gdbarch_overlay_update function,
3022 there's really nothing useful to do here (can't really go auto). */
3023 gdbarch
= get_objfile_arch (osect
->objfile
);
3024 if (gdbarch_overlay_update_p (gdbarch
))
3026 if (overlay_cache_invalid
)
3028 overlay_invalidate_all ();
3029 overlay_cache_invalid
= 0;
3031 if (osect
->ovly_mapped
== -1)
3032 gdbarch_overlay_update (gdbarch
, osect
);
3035 case ovly_on
: /* overlay debugging manual */
3036 return osect
->ovly_mapped
== 1;
3040 /* Function: pc_in_unmapped_range
3041 If PC falls into the lma range of SECTION, return true, else false. */
3044 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3046 if (section_is_overlay (section
))
3048 bfd
*abfd
= section
->objfile
->obfd
;
3049 asection
*bfd_section
= section
->the_bfd_section
;
3051 /* We assume the LMA is relocated by the same offset as the VMA. */
3052 bfd_vma size
= bfd_get_section_size (bfd_section
);
3053 CORE_ADDR offset
= obj_section_offset (section
);
3055 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3056 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3063 /* Function: pc_in_mapped_range
3064 If PC falls into the vma range of SECTION, return true, else false. */
3067 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3069 if (section_is_overlay (section
))
3071 if (obj_section_addr (section
) <= pc
3072 && pc
< obj_section_endaddr (section
))
3079 /* Return true if the mapped ranges of sections A and B overlap, false
3083 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3085 CORE_ADDR a_start
= obj_section_addr (a
);
3086 CORE_ADDR a_end
= obj_section_endaddr (a
);
3087 CORE_ADDR b_start
= obj_section_addr (b
);
3088 CORE_ADDR b_end
= obj_section_endaddr (b
);
3090 return (a_start
< b_end
&& b_start
< a_end
);
3093 /* Function: overlay_unmapped_address (PC, SECTION)
3094 Returns the address corresponding to PC in the unmapped (load) range.
3095 May be the same as PC. */
3098 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3100 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3102 asection
*bfd_section
= section
->the_bfd_section
;
3104 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3105 - bfd_section_vma (abfd
, bfd_section
);
3111 /* Function: overlay_mapped_address (PC, SECTION)
3112 Returns the address corresponding to PC in the mapped (runtime) range.
3113 May be the same as PC. */
3116 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3118 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3120 asection
*bfd_section
= section
->the_bfd_section
;
3122 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3123 - bfd_section_lma (abfd
, bfd_section
);
3129 /* Function: symbol_overlayed_address
3130 Return one of two addresses (relative to the VMA or to the LMA),
3131 depending on whether the section is mapped or not. */
3134 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3136 if (overlay_debugging
)
3138 /* If the symbol has no section, just return its regular address. */
3141 /* If the symbol's section is not an overlay, just return its
3143 if (!section_is_overlay (section
))
3145 /* If the symbol's section is mapped, just return its address. */
3146 if (section_is_mapped (section
))
3149 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3150 * then return its LOADED address rather than its vma address!!
3152 return overlay_unmapped_address (address
, section
);
3157 /* Function: find_pc_overlay (PC)
3158 Return the best-match overlay section for PC:
3159 If PC matches a mapped overlay section's VMA, return that section.
3160 Else if PC matches an unmapped section's VMA, return that section.
3161 Else if PC matches an unmapped section's LMA, return that section. */
3163 struct obj_section
*
3164 find_pc_overlay (CORE_ADDR pc
)
3166 struct obj_section
*osect
, *best_match
= NULL
;
3168 if (overlay_debugging
)
3170 for (objfile
*objfile
: current_program_space
->objfiles ())
3171 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3172 if (section_is_overlay (osect
))
3174 if (pc_in_mapped_range (pc
, osect
))
3176 if (section_is_mapped (osect
))
3181 else if (pc_in_unmapped_range (pc
, osect
))
3188 /* Function: find_pc_mapped_section (PC)
3189 If PC falls into the VMA address range of an overlay section that is
3190 currently marked as MAPPED, return that section. Else return NULL. */
3192 struct obj_section
*
3193 find_pc_mapped_section (CORE_ADDR pc
)
3195 struct obj_section
*osect
;
3197 if (overlay_debugging
)
3199 for (objfile
*objfile
: current_program_space
->objfiles ())
3200 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3201 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3208 /* Function: list_overlays_command
3209 Print a list of mapped sections and their PC ranges. */
3212 list_overlays_command (const char *args
, int from_tty
)
3215 struct obj_section
*osect
;
3217 if (overlay_debugging
)
3219 for (objfile
*objfile
: current_program_space
->objfiles ())
3220 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3221 if (section_is_mapped (osect
))
3223 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3228 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3229 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3230 size
= bfd_get_section_size (osect
->the_bfd_section
);
3231 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3233 printf_filtered ("Section %s, loaded at ", name
);
3234 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3235 puts_filtered (" - ");
3236 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3237 printf_filtered (", mapped at ");
3238 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3239 puts_filtered (" - ");
3240 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3241 puts_filtered ("\n");
3247 printf_filtered (_("No sections are mapped.\n"));
3250 /* Function: map_overlay_command
3251 Mark the named section as mapped (ie. residing at its VMA address). */
3254 map_overlay_command (const char *args
, int from_tty
)
3256 struct obj_section
*sec
, *sec2
;
3258 if (!overlay_debugging
)
3259 error (_("Overlay debugging not enabled. Use "
3260 "either the 'overlay auto' or\n"
3261 "the 'overlay manual' command."));
3263 if (args
== 0 || *args
== 0)
3264 error (_("Argument required: name of an overlay section"));
3266 /* First, find a section matching the user supplied argument. */
3267 for (objfile
*obj_file
: current_program_space
->objfiles ())
3268 ALL_OBJFILE_OSECTIONS (obj_file
, sec
)
3269 if (!strcmp (bfd_section_name (obj_file
->obfd
, sec
->the_bfd_section
),
3272 /* Now, check to see if the section is an overlay. */
3273 if (!section_is_overlay (sec
))
3274 continue; /* not an overlay section */
3276 /* Mark the overlay as "mapped". */
3277 sec
->ovly_mapped
= 1;
3279 /* Next, make a pass and unmap any sections that are
3280 overlapped by this new section: */
3281 for (objfile
*objfile2
: current_program_space
->objfiles ())
3282 ALL_OBJFILE_OSECTIONS (objfile2
, sec2
)
3283 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
,
3287 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3288 bfd_section_name (obj_file
->obfd
,
3289 sec2
->the_bfd_section
));
3290 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3294 error (_("No overlay section called %s"), args
);
3297 /* Function: unmap_overlay_command
3298 Mark the overlay section as unmapped
3299 (ie. resident in its LMA address range, rather than the VMA range). */
3302 unmap_overlay_command (const char *args
, int from_tty
)
3304 struct obj_section
*sec
= NULL
;
3306 if (!overlay_debugging
)
3307 error (_("Overlay debugging not enabled. "
3308 "Use either the 'overlay auto' or\n"
3309 "the 'overlay manual' command."));
3311 if (args
== 0 || *args
== 0)
3312 error (_("Argument required: name of an overlay section"));
3314 /* First, find a section matching the user supplied argument. */
3315 for (objfile
*objfile
: current_program_space
->objfiles ())
3316 ALL_OBJFILE_OSECTIONS (objfile
, sec
)
3317 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3319 if (!sec
->ovly_mapped
)
3320 error (_("Section %s is not mapped"), args
);
3321 sec
->ovly_mapped
= 0;
3324 error (_("No overlay section called %s"), args
);
3327 /* Function: overlay_auto_command
3328 A utility command to turn on overlay debugging.
3329 Possibly this should be done via a set/show command. */
3332 overlay_auto_command (const char *args
, int from_tty
)
3334 overlay_debugging
= ovly_auto
;
3335 enable_overlay_breakpoints ();
3337 printf_unfiltered (_("Automatic overlay debugging enabled."));
3340 /* Function: overlay_manual_command
3341 A utility command to turn on overlay debugging.
3342 Possibly this should be done via a set/show command. */
3345 overlay_manual_command (const char *args
, int from_tty
)
3347 overlay_debugging
= ovly_on
;
3348 disable_overlay_breakpoints ();
3350 printf_unfiltered (_("Overlay debugging enabled."));
3353 /* Function: overlay_off_command
3354 A utility command to turn on overlay debugging.
3355 Possibly this should be done via a set/show command. */
3358 overlay_off_command (const char *args
, int from_tty
)
3360 overlay_debugging
= ovly_off
;
3361 disable_overlay_breakpoints ();
3363 printf_unfiltered (_("Overlay debugging disabled."));
3367 overlay_load_command (const char *args
, int from_tty
)
3369 struct gdbarch
*gdbarch
= get_current_arch ();
3371 if (gdbarch_overlay_update_p (gdbarch
))
3372 gdbarch_overlay_update (gdbarch
, NULL
);
3374 error (_("This target does not know how to read its overlay state."));
3377 /* Function: overlay_command
3378 A place-holder for a mis-typed command. */
3380 /* Command list chain containing all defined "overlay" subcommands. */
3381 static struct cmd_list_element
*overlaylist
;
3384 overlay_command (const char *args
, int from_tty
)
3387 ("\"overlay\" must be followed by the name of an overlay command.\n");
3388 help_list (overlaylist
, "overlay ", all_commands
, gdb_stdout
);
3391 /* Target Overlays for the "Simplest" overlay manager:
3393 This is GDB's default target overlay layer. It works with the
3394 minimal overlay manager supplied as an example by Cygnus. The
3395 entry point is via a function pointer "gdbarch_overlay_update",
3396 so targets that use a different runtime overlay manager can
3397 substitute their own overlay_update function and take over the
3400 The overlay_update function pokes around in the target's data structures
3401 to see what overlays are mapped, and updates GDB's overlay mapping with
3404 In this simple implementation, the target data structures are as follows:
3405 unsigned _novlys; /# number of overlay sections #/
3406 unsigned _ovly_table[_novlys][4] = {
3407 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3408 {..., ..., ..., ...},
3410 unsigned _novly_regions; /# number of overlay regions #/
3411 unsigned _ovly_region_table[_novly_regions][3] = {
3412 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3415 These functions will attempt to update GDB's mappedness state in the
3416 symbol section table, based on the target's mappedness state.
3418 To do this, we keep a cached copy of the target's _ovly_table, and
3419 attempt to detect when the cached copy is invalidated. The main
3420 entry point is "simple_overlay_update(SECT), which looks up SECT in
3421 the cached table and re-reads only the entry for that section from
3422 the target (whenever possible). */
3424 /* Cached, dynamically allocated copies of the target data structures: */
3425 static unsigned (*cache_ovly_table
)[4] = 0;
3426 static unsigned cache_novlys
= 0;
3427 static CORE_ADDR cache_ovly_table_base
= 0;
3430 VMA
, OSIZE
, LMA
, MAPPED
3433 /* Throw away the cached copy of _ovly_table. */
3436 simple_free_overlay_table (void)
3438 if (cache_ovly_table
)
3439 xfree (cache_ovly_table
);
3441 cache_ovly_table
= NULL
;
3442 cache_ovly_table_base
= 0;
3445 /* Read an array of ints of size SIZE from the target into a local buffer.
3446 Convert to host order. int LEN is number of ints. */
3449 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3450 int len
, int size
, enum bfd_endian byte_order
)
3452 /* FIXME (alloca): Not safe if array is very large. */
3453 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3456 read_memory (memaddr
, buf
, len
* size
);
3457 for (i
= 0; i
< len
; i
++)
3458 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3461 /* Find and grab a copy of the target _ovly_table
3462 (and _novlys, which is needed for the table's size). */
3465 simple_read_overlay_table (void)
3467 struct bound_minimal_symbol novlys_msym
;
3468 struct bound_minimal_symbol ovly_table_msym
;
3469 struct gdbarch
*gdbarch
;
3471 enum bfd_endian byte_order
;
3473 simple_free_overlay_table ();
3474 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3475 if (! novlys_msym
.minsym
)
3477 error (_("Error reading inferior's overlay table: "
3478 "couldn't find `_novlys' variable\n"
3479 "in inferior. Use `overlay manual' mode."));
3483 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3484 if (! ovly_table_msym
.minsym
)
3486 error (_("Error reading inferior's overlay table: couldn't find "
3487 "`_ovly_table' array\n"
3488 "in inferior. Use `overlay manual' mode."));
3492 gdbarch
= get_objfile_arch (ovly_table_msym
.objfile
);
3493 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3494 byte_order
= gdbarch_byte_order (gdbarch
);
3496 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3499 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3500 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3501 read_target_long_array (cache_ovly_table_base
,
3502 (unsigned int *) cache_ovly_table
,
3503 cache_novlys
* 4, word_size
, byte_order
);
3505 return 1; /* SUCCESS */
3508 /* Function: simple_overlay_update_1
3509 A helper function for simple_overlay_update. Assuming a cached copy
3510 of _ovly_table exists, look through it to find an entry whose vma,
3511 lma and size match those of OSECT. Re-read the entry and make sure
3512 it still matches OSECT (else the table may no longer be valid).
3513 Set OSECT's mapped state to match the entry. Return: 1 for
3514 success, 0 for failure. */
3517 simple_overlay_update_1 (struct obj_section
*osect
)
3520 asection
*bsect
= osect
->the_bfd_section
;
3521 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3522 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3523 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3525 for (i
= 0; i
< cache_novlys
; i
++)
3526 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3527 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3529 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3530 (unsigned int *) cache_ovly_table
[i
],
3531 4, word_size
, byte_order
);
3532 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3533 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3535 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3538 else /* Warning! Warning! Target's ovly table has changed! */
3544 /* Function: simple_overlay_update
3545 If OSECT is NULL, then update all sections' mapped state
3546 (after re-reading the entire target _ovly_table).
3547 If OSECT is non-NULL, then try to find a matching entry in the
3548 cached ovly_table and update only OSECT's mapped state.
3549 If a cached entry can't be found or the cache isn't valid, then
3550 re-read the entire cache, and go ahead and update all sections. */
3553 simple_overlay_update (struct obj_section
*osect
)
3555 /* Were we given an osect to look up? NULL means do all of them. */
3557 /* Have we got a cached copy of the target's overlay table? */
3558 if (cache_ovly_table
!= NULL
)
3560 /* Does its cached location match what's currently in the
3562 struct bound_minimal_symbol minsym
3563 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3565 if (minsym
.minsym
== NULL
)
3566 error (_("Error reading inferior's overlay table: couldn't "
3567 "find `_ovly_table' array\n"
3568 "in inferior. Use `overlay manual' mode."));
3570 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3571 /* Then go ahead and try to look up this single section in
3573 if (simple_overlay_update_1 (osect
))
3574 /* Found it! We're done. */
3578 /* Cached table no good: need to read the entire table anew.
3579 Or else we want all the sections, in which case it's actually
3580 more efficient to read the whole table in one block anyway. */
3582 if (! simple_read_overlay_table ())
3585 /* Now may as well update all sections, even if only one was requested. */
3586 for (objfile
*objfile
: current_program_space
->objfiles ())
3587 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3588 if (section_is_overlay (osect
))
3591 asection
*bsect
= osect
->the_bfd_section
;
3593 for (i
= 0; i
< cache_novlys
; i
++)
3594 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3595 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
))
3596 { /* obj_section matches i'th entry in ovly_table. */
3597 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3598 break; /* finished with inner for loop: break out. */
3603 /* Set the output sections and output offsets for section SECTP in
3604 ABFD. The relocation code in BFD will read these offsets, so we
3605 need to be sure they're initialized. We map each section to itself,
3606 with no offset; this means that SECTP->vma will be honored. */
3609 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3611 sectp
->output_section
= sectp
;
3612 sectp
->output_offset
= 0;
3615 /* Default implementation for sym_relocate. */
3618 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3621 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3623 bfd
*abfd
= sectp
->owner
;
3625 /* We're only interested in sections with relocation
3627 if ((sectp
->flags
& SEC_RELOC
) == 0)
3630 /* We will handle section offsets properly elsewhere, so relocate as if
3631 all sections begin at 0. */
3632 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3634 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3637 /* Relocate the contents of a debug section SECTP in ABFD. The
3638 contents are stored in BUF if it is non-NULL, or returned in a
3639 malloc'd buffer otherwise.
3641 For some platforms and debug info formats, shared libraries contain
3642 relocations against the debug sections (particularly for DWARF-2;
3643 one affected platform is PowerPC GNU/Linux, although it depends on
3644 the version of the linker in use). Also, ELF object files naturally
3645 have unresolved relocations for their debug sections. We need to apply
3646 the relocations in order to get the locations of symbols correct.
3647 Another example that may require relocation processing, is the
3648 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3652 symfile_relocate_debug_section (struct objfile
*objfile
,
3653 asection
*sectp
, bfd_byte
*buf
)
3655 gdb_assert (objfile
->sf
->sym_relocate
);
3657 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3660 struct symfile_segment_data
*
3661 get_symfile_segment_data (bfd
*abfd
)
3663 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3668 return sf
->sym_segments (abfd
);
3672 free_symfile_segment_data (struct symfile_segment_data
*data
)
3674 xfree (data
->segment_bases
);
3675 xfree (data
->segment_sizes
);
3676 xfree (data
->segment_info
);
3681 - DATA, containing segment addresses from the object file ABFD, and
3682 the mapping from ABFD's sections onto the segments that own them,
3684 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3685 segment addresses reported by the target,
3686 store the appropriate offsets for each section in OFFSETS.
3688 If there are fewer entries in SEGMENT_BASES than there are segments
3689 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3691 If there are more entries, then ignore the extra. The target may
3692 not be able to distinguish between an empty data segment and a
3693 missing data segment; a missing text segment is less plausible. */
3696 symfile_map_offsets_to_segments (bfd
*abfd
,
3697 const struct symfile_segment_data
*data
,
3698 struct section_offsets
*offsets
,
3699 int num_segment_bases
,
3700 const CORE_ADDR
*segment_bases
)
3705 /* It doesn't make sense to call this function unless you have some
3706 segment base addresses. */
3707 gdb_assert (num_segment_bases
> 0);
3709 /* If we do not have segment mappings for the object file, we
3710 can not relocate it by segments. */
3711 gdb_assert (data
!= NULL
);
3712 gdb_assert (data
->num_segments
> 0);
3714 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3716 int which
= data
->segment_info
[i
];
3718 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
3720 /* Don't bother computing offsets for sections that aren't
3721 loaded as part of any segment. */
3725 /* Use the last SEGMENT_BASES entry as the address of any extra
3726 segments mentioned in DATA->segment_info. */
3727 if (which
> num_segment_bases
)
3728 which
= num_segment_bases
;
3730 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
3731 - data
->segment_bases
[which
- 1]);
3738 symfile_find_segment_sections (struct objfile
*objfile
)
3740 bfd
*abfd
= objfile
->obfd
;
3743 struct symfile_segment_data
*data
;
3745 data
= get_symfile_segment_data (objfile
->obfd
);
3749 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
3751 free_symfile_segment_data (data
);
3755 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3757 int which
= data
->segment_info
[i
];
3761 if (objfile
->sect_index_text
== -1)
3762 objfile
->sect_index_text
= sect
->index
;
3764 if (objfile
->sect_index_rodata
== -1)
3765 objfile
->sect_index_rodata
= sect
->index
;
3767 else if (which
== 2)
3769 if (objfile
->sect_index_data
== -1)
3770 objfile
->sect_index_data
= sect
->index
;
3772 if (objfile
->sect_index_bss
== -1)
3773 objfile
->sect_index_bss
= sect
->index
;
3777 free_symfile_segment_data (data
);
3780 /* Listen for free_objfile events. */
3783 symfile_free_objfile (struct objfile
*objfile
)
3785 /* Remove the target sections owned by this objfile. */
3786 if (objfile
!= NULL
)
3787 remove_target_sections ((void *) objfile
);
3790 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3791 Expand all symtabs that match the specified criteria.
3792 See quick_symbol_functions.expand_symtabs_matching for details. */
3795 expand_symtabs_matching
3796 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3797 const lookup_name_info
&lookup_name
,
3798 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3799 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3800 enum search_domain kind
)
3802 for (objfile
*objfile
: current_program_space
->objfiles ())
3805 objfile
->sf
->qf
->expand_symtabs_matching (objfile
, file_matcher
,
3808 expansion_notify
, kind
);
3812 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3813 Map function FUN over every file.
3814 See quick_symbol_functions.map_symbol_filenames for details. */
3817 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3820 for (objfile
*objfile
: current_program_space
->objfiles ())
3823 objfile
->sf
->qf
->map_symbol_filenames (objfile
, fun
, data
,
3830 namespace selftests
{
3831 namespace filename_language
{
3833 static void test_filename_language ()
3835 /* This test messes up the filename_language_table global. */
3836 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3838 /* Test deducing an unknown extension. */
3839 language lang
= deduce_language_from_filename ("myfile.blah");
3840 SELF_CHECK (lang
== language_unknown
);
3842 /* Test deducing a known extension. */
3843 lang
= deduce_language_from_filename ("myfile.c");
3844 SELF_CHECK (lang
== language_c
);
3846 /* Test adding a new extension using the internal API. */
3847 add_filename_language (".blah", language_pascal
);
3848 lang
= deduce_language_from_filename ("myfile.blah");
3849 SELF_CHECK (lang
== language_pascal
);
3853 test_set_ext_lang_command ()
3855 /* This test messes up the filename_language_table global. */
3856 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3858 /* Confirm that the .hello extension is not known. */
3859 language lang
= deduce_language_from_filename ("cake.hello");
3860 SELF_CHECK (lang
== language_unknown
);
3862 /* Test adding a new extension using the CLI command. */
3863 gdb::unique_xmalloc_ptr
<char> args_holder (xstrdup (".hello rust"));
3864 ext_args
= args_holder
.get ();
3865 set_ext_lang_command (NULL
, 1, NULL
);
3867 lang
= deduce_language_from_filename ("cake.hello");
3868 SELF_CHECK (lang
== language_rust
);
3870 /* Test overriding an existing extension using the CLI command. */
3871 int size_before
= filename_language_table
.size ();
3872 args_holder
.reset (xstrdup (".hello pascal"));
3873 ext_args
= args_holder
.get ();
3874 set_ext_lang_command (NULL
, 1, NULL
);
3875 int size_after
= filename_language_table
.size ();
3877 lang
= deduce_language_from_filename ("cake.hello");
3878 SELF_CHECK (lang
== language_pascal
);
3879 SELF_CHECK (size_before
== size_after
);
3882 } /* namespace filename_language */
3883 } /* namespace selftests */
3885 #endif /* GDB_SELF_TEST */
3888 _initialize_symfile (void)
3890 struct cmd_list_element
*c
;
3892 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3894 #define READNOW_READNEVER_HELP \
3895 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3896 immediately. This makes the command slower, but may make future operations\n\
3898 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3899 symbolic debug information."
3901 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3902 Load symbol table from executable file FILE.\n\
3903 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3904 OFF is an optional offset which is added to each section address.\n\
3905 The `file' command can also load symbol tables, as well as setting the file\n\
3906 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3907 set_cmd_completer (c
, filename_completer
);
3909 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3910 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3911 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3912 [-s SECT-NAME SECT-ADDR]...\n\
3913 ADDR is the starting address of the file's text.\n\
3914 Each '-s' argument provides a section name and address, and\n\
3915 should be specified if the data and bss segments are not contiguous\n\
3916 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3917 OFF is an optional offset which is added to the default load addresses\n\
3918 of all sections for which no other address was specified.\n"
3919 READNOW_READNEVER_HELP
),
3921 set_cmd_completer (c
, filename_completer
);
3923 c
= add_cmd ("remove-symbol-file", class_files
,
3924 remove_symbol_file_command
, _("\
3925 Remove a symbol file added via the add-symbol-file command.\n\
3926 Usage: remove-symbol-file FILENAME\n\
3927 remove-symbol-file -a ADDRESS\n\
3928 The file to remove can be identified by its filename or by an address\n\
3929 that lies within the boundaries of this symbol file in memory."),
3932 c
= add_cmd ("load", class_files
, load_command
, _("\
3933 Dynamically load FILE into the running program, and record its symbols\n\
3934 for access from GDB.\n\
3935 Usage: load [FILE] [OFFSET]\n\
3936 An optional load OFFSET may also be given as a literal address.\n\
3937 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3938 on its own."), &cmdlist
);
3939 set_cmd_completer (c
, filename_completer
);
3941 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3942 _("Commands for debugging overlays."), &overlaylist
,
3943 "overlay ", 0, &cmdlist
);
3945 add_com_alias ("ovly", "overlay", class_alias
, 1);
3946 add_com_alias ("ov", "overlay", class_alias
, 1);
3948 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3949 _("Assert that an overlay section is mapped."), &overlaylist
);
3951 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3952 _("Assert that an overlay section is unmapped."), &overlaylist
);
3954 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3955 _("List mappings of overlay sections."), &overlaylist
);
3957 add_cmd ("manual", class_support
, overlay_manual_command
,
3958 _("Enable overlay debugging."), &overlaylist
);
3959 add_cmd ("off", class_support
, overlay_off_command
,
3960 _("Disable overlay debugging."), &overlaylist
);
3961 add_cmd ("auto", class_support
, overlay_auto_command
,
3962 _("Enable automatic overlay debugging."), &overlaylist
);
3963 add_cmd ("load-target", class_support
, overlay_load_command
,
3964 _("Read the overlay mapping state from the target."), &overlaylist
);
3966 /* Filename extension to source language lookup table: */
3967 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3969 Set mapping between filename extension and source language."), _("\
3970 Show mapping between filename extension and source language."), _("\
3971 Usage: set extension-language .foo bar"),
3972 set_ext_lang_command
,
3974 &setlist
, &showlist
);
3976 add_info ("extensions", info_ext_lang_command
,
3977 _("All filename extensions associated with a source language."));
3979 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3980 &debug_file_directory
, _("\
3981 Set the directories where separate debug symbols are searched for."), _("\
3982 Show the directories where separate debug symbols are searched for."), _("\
3983 Separate debug symbols are first searched for in the same\n\
3984 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3985 and lastly at the path of the directory of the binary with\n\
3986 each global debug-file-directory component prepended."),
3988 show_debug_file_directory
,
3989 &setlist
, &showlist
);
3991 add_setshow_enum_cmd ("symbol-loading", no_class
,
3992 print_symbol_loading_enums
, &print_symbol_loading
,
3994 Set printing of symbol loading messages."), _("\
3995 Show printing of symbol loading messages."), _("\
3996 off == turn all messages off\n\
3997 brief == print messages for the executable,\n\
3998 and brief messages for shared libraries\n\
3999 full == print messages for the executable,\n\
4000 and messages for each shared library."),
4003 &setprintlist
, &showprintlist
);
4005 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
4006 &separate_debug_file_debug
, _("\
4007 Set printing of separate debug info file search debug."), _("\
4008 Show printing of separate debug info file search debug."), _("\
4009 When on, GDB prints the searched locations while looking for separate debug \
4010 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
4013 selftests::register_test
4014 ("filename_language", selftests::filename_language::test_filename_language
);
4015 selftests::register_test
4016 ("set_ext_lang_command",
4017 selftests::filename_language::test_set_ext_lang_command
);