1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990-2021 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/tilde.h"
49 #include "observable.h"
51 #include "parser-defs.h"
58 #include "cli/cli-utils.h"
59 #include "gdbsupport/byte-vector.h"
60 #include "gdbsupport/pathstuff.h"
61 #include "gdbsupport/selftest.h"
62 #include "cli/cli-style.h"
63 #include "gdbsupport/forward-scope-exit.h"
65 #include <sys/types.h>
72 int (*deprecated_ui_load_progress_hook
) (const char *section
,
74 void (*deprecated_show_load_progress
) (const char *section
,
75 unsigned long section_sent
,
76 unsigned long section_size
,
77 unsigned long total_sent
,
78 unsigned long total_size
);
79 void (*deprecated_pre_add_symbol_hook
) (const char *);
80 void (*deprecated_post_add_symbol_hook
) (void);
82 using clear_symtab_users_cleanup
83 = FORWARD_SCOPE_EXIT (clear_symtab_users
);
85 /* Global variables owned by this file. */
89 int readnow_symbol_files
;
93 int readnever_symbol_files
;
95 /* Functions this file defines. */
97 static void symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
98 objfile_flags flags
, CORE_ADDR reloff
);
100 static const struct sym_fns
*find_sym_fns (bfd
*);
102 static void overlay_invalidate_all (void);
104 static void simple_free_overlay_table (void);
106 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
109 static int simple_read_overlay_table (void);
111 static int simple_overlay_update_1 (struct obj_section
*);
113 static void symfile_find_segment_sections (struct objfile
*objfile
);
115 /* List of all available sym_fns. On gdb startup, each object file reader
116 calls add_symtab_fns() to register information on each format it is
119 struct registered_sym_fns
121 registered_sym_fns (bfd_flavour sym_flavour_
, const struct sym_fns
*sym_fns_
)
122 : sym_flavour (sym_flavour_
), sym_fns (sym_fns_
)
125 /* BFD flavour that we handle. */
126 enum bfd_flavour sym_flavour
;
128 /* The "vtable" of symbol functions. */
129 const struct sym_fns
*sym_fns
;
132 static std::vector
<registered_sym_fns
> symtab_fns
;
134 /* Values for "set print symbol-loading". */
136 const char print_symbol_loading_off
[] = "off";
137 const char print_symbol_loading_brief
[] = "brief";
138 const char print_symbol_loading_full
[] = "full";
139 static const char *print_symbol_loading_enums
[] =
141 print_symbol_loading_off
,
142 print_symbol_loading_brief
,
143 print_symbol_loading_full
,
146 static const char *print_symbol_loading
= print_symbol_loading_full
;
150 bool auto_solib_add
= true;
153 /* Return non-zero if symbol-loading messages should be printed.
154 FROM_TTY is the standard from_tty argument to gdb commands.
155 If EXEC is non-zero the messages are for the executable.
156 Otherwise, messages are for shared libraries.
157 If FULL is non-zero then the caller is printing a detailed message.
158 E.g., the message includes the shared library name.
159 Otherwise, the caller is printing a brief "summary" message. */
162 print_symbol_loading_p (int from_tty
, int exec
, int full
)
164 if (!from_tty
&& !info_verbose
)
169 /* We don't check FULL for executables, there are few such
170 messages, therefore brief == full. */
171 return print_symbol_loading
!= print_symbol_loading_off
;
174 return print_symbol_loading
== print_symbol_loading_full
;
175 return print_symbol_loading
== print_symbol_loading_brief
;
178 /* True if we are reading a symbol table. */
180 int currently_reading_symtab
= 0;
182 /* Increment currently_reading_symtab and return a cleanup that can be
183 used to decrement it. */
185 scoped_restore_tmpl
<int>
186 increment_reading_symtab (void)
188 gdb_assert (currently_reading_symtab
>= 0);
189 return make_scoped_restore (¤tly_reading_symtab
,
190 currently_reading_symtab
+ 1);
193 /* Remember the lowest-addressed loadable section we've seen.
195 In case of equal vmas, the section with the largest size becomes the
196 lowest-addressed loadable section.
198 If the vmas and sizes are equal, the last section is considered the
199 lowest-addressed loadable section. */
202 find_lowest_section (asection
*sect
, asection
**lowest
)
204 if (0 == (bfd_section_flags (sect
) & (SEC_ALLOC
| SEC_LOAD
)))
207 *lowest
= sect
; /* First loadable section */
208 else if (bfd_section_vma (*lowest
) > bfd_section_vma (sect
))
209 *lowest
= sect
; /* A lower loadable section */
210 else if (bfd_section_vma (*lowest
) == bfd_section_vma (sect
)
211 && (bfd_section_size (*lowest
) <= bfd_section_size (sect
)))
215 /* Build (allocate and populate) a section_addr_info struct from
216 an existing section table. */
219 build_section_addr_info_from_section_table (const target_section_table
&table
)
221 section_addr_info sap
;
223 for (const target_section
&stp
: table
)
225 struct bfd_section
*asect
= stp
.the_bfd_section
;
226 bfd
*abfd
= asect
->owner
;
228 if (bfd_section_flags (asect
) & (SEC_ALLOC
| SEC_LOAD
)
229 && sap
.size () < table
.size ())
230 sap
.emplace_back (stp
.addr
,
231 bfd_section_name (asect
),
232 gdb_bfd_section_index (abfd
, asect
));
238 /* Create a section_addr_info from section offsets in ABFD. */
240 static section_addr_info
241 build_section_addr_info_from_bfd (bfd
*abfd
)
243 struct bfd_section
*sec
;
245 section_addr_info sap
;
246 for (sec
= abfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
247 if (bfd_section_flags (sec
) & (SEC_ALLOC
| SEC_LOAD
))
248 sap
.emplace_back (bfd_section_vma (sec
),
249 bfd_section_name (sec
),
250 gdb_bfd_section_index (abfd
, sec
));
255 /* Create a section_addr_info from section offsets in OBJFILE. */
258 build_section_addr_info_from_objfile (const struct objfile
*objfile
)
262 /* Before reread_symbols gets rewritten it is not safe to call:
263 gdb_assert (objfile->num_sections == bfd_count_sections (objfile->obfd));
265 section_addr_info sap
= build_section_addr_info_from_bfd (objfile
->obfd
);
266 for (i
= 0; i
< sap
.size (); i
++)
268 int sectindex
= sap
[i
].sectindex
;
270 sap
[i
].addr
+= objfile
->section_offsets
[sectindex
];
275 /* Initialize OBJFILE's sect_index_* members. */
278 init_objfile_sect_indices (struct objfile
*objfile
)
283 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
285 objfile
->sect_index_text
= sect
->index
;
287 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
289 objfile
->sect_index_data
= sect
->index
;
291 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
293 objfile
->sect_index_bss
= sect
->index
;
295 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
297 objfile
->sect_index_rodata
= sect
->index
;
299 /* This is where things get really weird... We MUST have valid
300 indices for the various sect_index_* members or gdb will abort.
301 So if for example, there is no ".text" section, we have to
302 accomodate that. First, check for a file with the standard
303 one or two segments. */
305 symfile_find_segment_sections (objfile
);
307 /* Except when explicitly adding symbol files at some address,
308 section_offsets contains nothing but zeros, so it doesn't matter
309 which slot in section_offsets the individual sect_index_* members
310 index into. So if they are all zero, it is safe to just point
311 all the currently uninitialized indices to the first slot. But
312 beware: if this is the main executable, it may be relocated
313 later, e.g. by the remote qOffsets packet, and then this will
314 be wrong! That's why we try segments first. */
316 for (i
= 0; i
< objfile
->section_offsets
.size (); i
++)
318 if (objfile
->section_offsets
[i
] != 0)
323 if (i
== objfile
->section_offsets
.size ())
325 if (objfile
->sect_index_text
== -1)
326 objfile
->sect_index_text
= 0;
327 if (objfile
->sect_index_data
== -1)
328 objfile
->sect_index_data
= 0;
329 if (objfile
->sect_index_bss
== -1)
330 objfile
->sect_index_bss
= 0;
331 if (objfile
->sect_index_rodata
== -1)
332 objfile
->sect_index_rodata
= 0;
336 /* Find a unique offset to use for loadable section SECT if
337 the user did not provide an offset. */
340 place_section (bfd
*abfd
, asection
*sect
, section_offsets
&offsets
,
343 CORE_ADDR start_addr
;
345 ULONGEST align
= ((ULONGEST
) 1) << bfd_section_alignment (sect
);
347 /* We are only interested in allocated sections. */
348 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
351 /* If the user specified an offset, honor it. */
352 if (offsets
[gdb_bfd_section_index (abfd
, sect
)] != 0)
355 /* Otherwise, let's try to find a place for the section. */
356 start_addr
= (lowest
+ align
- 1) & -align
;
363 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
365 int indx
= cur_sec
->index
;
367 /* We don't need to compare against ourself. */
371 /* We can only conflict with allocated sections. */
372 if ((bfd_section_flags (cur_sec
) & SEC_ALLOC
) == 0)
375 /* If the section offset is 0, either the section has not been placed
376 yet, or it was the lowest section placed (in which case LOWEST
377 will be past its end). */
378 if (offsets
[indx
] == 0)
381 /* If this section would overlap us, then we must move up. */
382 if (start_addr
+ bfd_section_size (sect
) > offsets
[indx
]
383 && start_addr
< offsets
[indx
] + bfd_section_size (cur_sec
))
385 start_addr
= offsets
[indx
] + bfd_section_size (cur_sec
);
386 start_addr
= (start_addr
+ align
- 1) & -align
;
391 /* Otherwise, we appear to be OK. So far. */
396 offsets
[gdb_bfd_section_index (abfd
, sect
)] = start_addr
;
397 lowest
= start_addr
+ bfd_section_size (sect
);
400 /* Store section_addr_info as prepared (made relative and with SECTINDEX
401 filled-in) by addr_info_make_relative into SECTION_OFFSETS. */
404 relative_addr_info_to_section_offsets (section_offsets
§ion_offsets
,
405 const section_addr_info
&addrs
)
409 section_offsets
.assign (section_offsets
.size (), 0);
411 /* Now calculate offsets for section that were specified by the caller. */
412 for (i
= 0; i
< addrs
.size (); i
++)
414 const struct other_sections
*osp
;
417 if (osp
->sectindex
== -1)
420 /* Record all sections in offsets. */
421 /* The section_offsets in the objfile are here filled in using
423 section_offsets
[osp
->sectindex
] = osp
->addr
;
427 /* Transform section name S for a name comparison. prelink can split section
428 `.bss' into two sections `.dynbss' and `.bss' (in this order). Similarly
429 prelink can split `.sbss' into `.sdynbss' and `.sbss'. Use virtual address
430 of the new `.dynbss' (`.sdynbss') section as the adjacent new `.bss'
431 (`.sbss') section has invalid (increased) virtual address. */
434 addr_section_name (const char *s
)
436 if (strcmp (s
, ".dynbss") == 0)
438 if (strcmp (s
, ".sdynbss") == 0)
444 /* std::sort comparator for addrs_section_sort. Sort entries in
445 ascending order by their (name, sectindex) pair. sectindex makes
446 the sort by name stable. */
449 addrs_section_compar (const struct other_sections
*a
,
450 const struct other_sections
*b
)
454 retval
= strcmp (addr_section_name (a
->name
.c_str ()),
455 addr_section_name (b
->name
.c_str ()));
459 return a
->sectindex
< b
->sectindex
;
462 /* Provide sorted array of pointers to sections of ADDRS. */
464 static std::vector
<const struct other_sections
*>
465 addrs_section_sort (const section_addr_info
&addrs
)
469 std::vector
<const struct other_sections
*> array (addrs
.size ());
470 for (i
= 0; i
< addrs
.size (); i
++)
471 array
[i
] = &addrs
[i
];
473 std::sort (array
.begin (), array
.end (), addrs_section_compar
);
478 /* Relativize absolute addresses in ADDRS into offsets based on ABFD. Fill-in
479 also SECTINDEXes specific to ABFD there. This function can be used to
480 rebase ADDRS to start referencing different BFD than before. */
483 addr_info_make_relative (section_addr_info
*addrs
, bfd
*abfd
)
485 asection
*lower_sect
;
486 CORE_ADDR lower_offset
;
489 /* Find lowest loadable section to be used as starting point for
490 contiguous sections. */
492 for (asection
*iter
: gdb_bfd_sections (abfd
))
493 find_lowest_section (iter
, &lower_sect
);
494 if (lower_sect
== NULL
)
496 warning (_("no loadable sections found in added symbol-file %s"),
497 bfd_get_filename (abfd
));
501 lower_offset
= bfd_section_vma (lower_sect
);
503 /* Create ADDRS_TO_ABFD_ADDRS array to map the sections in ADDRS to sections
504 in ABFD. Section names are not unique - there can be multiple sections of
505 the same name. Also the sections of the same name do not have to be
506 adjacent to each other. Some sections may be present only in one of the
507 files. Even sections present in both files do not have to be in the same
510 Use stable sort by name for the sections in both files. Then linearly
511 scan both lists matching as most of the entries as possible. */
513 std::vector
<const struct other_sections
*> addrs_sorted
514 = addrs_section_sort (*addrs
);
516 section_addr_info abfd_addrs
= build_section_addr_info_from_bfd (abfd
);
517 std::vector
<const struct other_sections
*> abfd_addrs_sorted
518 = addrs_section_sort (abfd_addrs
);
520 /* Now create ADDRS_TO_ABFD_ADDRS from ADDRS_SORTED and
521 ABFD_ADDRS_SORTED. */
523 std::vector
<const struct other_sections
*>
524 addrs_to_abfd_addrs (addrs
->size (), nullptr);
526 std::vector
<const struct other_sections
*>::iterator abfd_sorted_iter
527 = abfd_addrs_sorted
.begin ();
528 for (const other_sections
*sect
: addrs_sorted
)
530 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
532 while (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
533 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
537 if (abfd_sorted_iter
!= abfd_addrs_sorted
.end ()
538 && strcmp (addr_section_name ((*abfd_sorted_iter
)->name
.c_str ()),
543 /* Make the found item directly addressable from ADDRS. */
544 index_in_addrs
= sect
- addrs
->data ();
545 gdb_assert (addrs_to_abfd_addrs
[index_in_addrs
] == NULL
);
546 addrs_to_abfd_addrs
[index_in_addrs
] = *abfd_sorted_iter
;
548 /* Never use the same ABFD entry twice. */
553 /* Calculate offsets for the loadable sections.
554 FIXME! Sections must be in order of increasing loadable section
555 so that contiguous sections can use the lower-offset!!!
557 Adjust offsets if the segments are not contiguous.
558 If the section is contiguous, its offset should be set to
559 the offset of the highest loadable section lower than it
560 (the loadable section directly below it in memory).
561 this_offset = lower_offset = lower_addr - lower_orig_addr */
563 for (i
= 0; i
< addrs
->size (); i
++)
565 const struct other_sections
*sect
= addrs_to_abfd_addrs
[i
];
569 /* This is the index used by BFD. */
570 (*addrs
)[i
].sectindex
= sect
->sectindex
;
572 if ((*addrs
)[i
].addr
!= 0)
574 (*addrs
)[i
].addr
-= sect
->addr
;
575 lower_offset
= (*addrs
)[i
].addr
;
578 (*addrs
)[i
].addr
= lower_offset
;
582 /* addr_section_name transformation is not used for SECT_NAME. */
583 const std::string
§_name
= (*addrs
)[i
].name
;
585 /* This section does not exist in ABFD, which is normally
586 unexpected and we want to issue a warning.
588 However, the ELF prelinker does create a few sections which are
589 marked in the main executable as loadable (they are loaded in
590 memory from the DYNAMIC segment) and yet are not present in
591 separate debug info files. This is fine, and should not cause
592 a warning. Shared libraries contain just the section
593 ".gnu.liblist" but it is not marked as loadable there. There is
594 no other way to identify them than by their name as the sections
595 created by prelink have no special flags.
597 For the sections `.bss' and `.sbss' see addr_section_name. */
599 if (!(sect_name
== ".gnu.liblist"
600 || sect_name
== ".gnu.conflict"
601 || (sect_name
== ".bss"
603 && (*addrs
)[i
- 1].name
== ".dynbss"
604 && addrs_to_abfd_addrs
[i
- 1] != NULL
)
605 || (sect_name
== ".sbss"
607 && (*addrs
)[i
- 1].name
== ".sdynbss"
608 && addrs_to_abfd_addrs
[i
- 1] != NULL
)))
609 warning (_("section %s not found in %s"), sect_name
.c_str (),
610 bfd_get_filename (abfd
));
612 (*addrs
)[i
].addr
= 0;
613 (*addrs
)[i
].sectindex
= -1;
618 /* Parse the user's idea of an offset for dynamic linking, into our idea
619 of how to represent it for fast symbol reading. This is the default
620 version of the sym_fns.sym_offsets function for symbol readers that
621 don't need to do anything special. It allocates a section_offsets table
622 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
625 default_symfile_offsets (struct objfile
*objfile
,
626 const section_addr_info
&addrs
)
628 objfile
->section_offsets
.resize (gdb_bfd_count_sections (objfile
->obfd
));
629 relative_addr_info_to_section_offsets (objfile
->section_offsets
, addrs
);
631 /* For relocatable files, all loadable sections will start at zero.
632 The zero is meaningless, so try to pick arbitrary addresses such
633 that no loadable sections overlap. This algorithm is quadratic,
634 but the number of sections in a single object file is generally
636 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
638 bfd
*abfd
= objfile
->obfd
;
641 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
642 /* We do not expect this to happen; just skip this step if the
643 relocatable file has a section with an assigned VMA. */
644 if (bfd_section_vma (cur_sec
) != 0)
649 section_offsets
&offsets
= objfile
->section_offsets
;
651 /* Pick non-overlapping offsets for sections the user did not
653 CORE_ADDR lowest
= 0;
654 for (asection
*sect
: gdb_bfd_sections (objfile
->obfd
))
655 place_section (objfile
->obfd
, sect
, objfile
->section_offsets
,
658 /* Correctly filling in the section offsets is not quite
659 enough. Relocatable files have two properties that
660 (most) shared objects do not:
662 - Their debug information will contain relocations. Some
663 shared libraries do also, but many do not, so this can not
666 - If there are multiple code sections they will be loaded
667 at different relative addresses in memory than they are
668 in the objfile, since all sections in the file will start
671 Because GDB has very limited ability to map from an
672 address in debug info to the correct code section,
673 it relies on adding SECT_OFF_TEXT to things which might be
674 code. If we clear all the section offsets, and set the
675 section VMAs instead, then symfile_relocate_debug_section
676 will return meaningful debug information pointing at the
679 GDB has too many different data structures for section
680 addresses - a bfd, objfile, and so_list all have section
681 tables, as does exec_ops. Some of these could probably
684 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
685 cur_sec
= cur_sec
->next
)
687 if ((bfd_section_flags (cur_sec
) & SEC_ALLOC
) == 0)
690 bfd_set_section_vma (cur_sec
, offsets
[cur_sec
->index
]);
691 exec_set_section_address (bfd_get_filename (abfd
),
693 offsets
[cur_sec
->index
]);
694 offsets
[cur_sec
->index
] = 0;
699 /* Remember the bfd indexes for the .text, .data, .bss and
701 init_objfile_sect_indices (objfile
);
704 /* Divide the file into segments, which are individual relocatable units.
705 This is the default version of the sym_fns.sym_segments function for
706 symbol readers that do not have an explicit representation of segments.
707 It assumes that object files do not have segments, and fully linked
708 files have a single segment. */
710 symfile_segment_data_up
711 default_symfile_segments (bfd
*abfd
)
717 /* Relocatable files contain enough information to position each
718 loadable section independently; they should not be relocated
720 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
723 /* Make sure there is at least one loadable section in the file. */
724 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
726 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
734 low
= bfd_section_vma (sect
);
735 high
= low
+ bfd_section_size (sect
);
737 symfile_segment_data_up
data (new symfile_segment_data
);
739 num_sections
= bfd_count_sections (abfd
);
741 /* All elements are initialized to 0 (map to no segment). */
742 data
->segment_info
.resize (num_sections
);
744 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
748 if ((bfd_section_flags (sect
) & SEC_ALLOC
) == 0)
751 vma
= bfd_section_vma (sect
);
754 if (vma
+ bfd_section_size (sect
) > high
)
755 high
= vma
+ bfd_section_size (sect
);
757 data
->segment_info
[i
] = 1;
760 data
->segments
.emplace_back (low
, high
- low
);
765 /* This is a convenience function to call sym_read for OBJFILE and
766 possibly force the partial symbols to be read. */
769 read_symbols (struct objfile
*objfile
, symfile_add_flags add_flags
)
771 (*objfile
->sf
->sym_read
) (objfile
, add_flags
);
772 objfile
->per_bfd
->minsyms_read
= true;
774 /* find_separate_debug_file_in_section should be called only if there is
775 single binary with no existing separate debug info file. */
776 if (!objfile
->has_partial_symbols ()
777 && objfile
->separate_debug_objfile
== NULL
778 && objfile
->separate_debug_objfile_backlink
== NULL
)
780 gdb_bfd_ref_ptr
abfd (find_separate_debug_file_in_section (objfile
));
784 /* find_separate_debug_file_in_section uses the same filename for the
785 virtual section-as-bfd like the bfd filename containing the
786 section. Therefore use also non-canonical name form for the same
787 file containing the section. */
788 symbol_file_add_separate (abfd
.get (),
789 bfd_get_filename (abfd
.get ()),
790 add_flags
| SYMFILE_NOT_FILENAME
, objfile
);
793 if ((add_flags
& SYMFILE_NO_READ
) == 0)
794 objfile
->require_partial_symbols (false);
797 /* Initialize entry point information for this objfile. */
800 init_entry_point_info (struct objfile
*objfile
)
802 struct entry_info
*ei
= &objfile
->per_bfd
->ei
;
808 /* Save startup file's range of PC addresses to help blockframe.c
809 decide where the bottom of the stack is. */
811 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
813 /* Executable file -- record its entry point so we'll recognize
814 the startup file because it contains the entry point. */
815 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
816 ei
->entry_point_p
= 1;
818 else if (bfd_get_file_flags (objfile
->obfd
) & DYNAMIC
819 && bfd_get_start_address (objfile
->obfd
) != 0)
821 /* Some shared libraries may have entry points set and be
822 runnable. There's no clear way to indicate this, so just check
823 for values other than zero. */
824 ei
->entry_point
= bfd_get_start_address (objfile
->obfd
);
825 ei
->entry_point_p
= 1;
829 /* Examination of non-executable.o files. Short-circuit this stuff. */
830 ei
->entry_point_p
= 0;
833 if (ei
->entry_point_p
)
835 struct obj_section
*osect
;
836 CORE_ADDR entry_point
= ei
->entry_point
;
839 /* Make certain that the address points at real code, and not a
840 function descriptor. */
842 = gdbarch_convert_from_func_ptr_addr (objfile
->arch (),
844 current_top_target ());
846 /* Remove any ISA markers, so that this matches entries in the
849 = gdbarch_addr_bits_remove (objfile
->arch (), entry_point
);
852 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
854 struct bfd_section
*sect
= osect
->the_bfd_section
;
856 if (entry_point
>= bfd_section_vma (sect
)
857 && entry_point
< (bfd_section_vma (sect
)
858 + bfd_section_size (sect
)))
860 ei
->the_bfd_section_index
861 = gdb_bfd_section_index (objfile
->obfd
, sect
);
868 ei
->the_bfd_section_index
= SECT_OFF_TEXT (objfile
);
872 /* Process a symbol file, as either the main file or as a dynamically
875 This function does not set the OBJFILE's entry-point info.
877 OBJFILE is where the symbols are to be read from.
879 ADDRS is the list of section load addresses. If the user has given
880 an 'add-symbol-file' command, then this is the list of offsets and
881 addresses he or she provided as arguments to the command; or, if
882 we're handling a shared library, these are the actual addresses the
883 sections are loaded at, according to the inferior's dynamic linker
884 (as gleaned by GDB's shared library code). We convert each address
885 into an offset from the section VMA's as it appears in the object
886 file, and then call the file's sym_offsets function to convert this
887 into a format-specific offset table --- a `section_offsets'.
888 The sectindex field is used to control the ordering of sections
889 with the same name. Upon return, it is updated to contain the
890 corresponding BFD section index, or -1 if the section was not found.
892 ADD_FLAGS encodes verbosity level, whether this is main symbol or
893 an extra symbol file such as dynamically loaded code, and whether
894 breakpoint reset should be deferred. */
897 syms_from_objfile_1 (struct objfile
*objfile
,
898 section_addr_info
*addrs
,
899 symfile_add_flags add_flags
)
901 section_addr_info local_addr
;
902 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
904 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
905 objfile
->reset_psymtabs ();
906 objfile
->qf
.clear ();
907 objfile
->qf
.push_front (make_psymbol_functions (objfile
->partial_symtabs
));
909 if (objfile
->sf
== NULL
)
911 /* No symbols to load, but we still need to make sure
912 that the section_offsets table is allocated. */
913 int num_sections
= gdb_bfd_count_sections (objfile
->obfd
);
915 objfile
->section_offsets
.assign (num_sections
, 0);
919 /* Make sure that partially constructed symbol tables will be cleaned up
920 if an error occurs during symbol reading. */
921 gdb::optional
<clear_symtab_users_cleanup
> defer_clear_users
;
923 objfile_up
objfile_holder (objfile
);
925 /* If ADDRS is NULL, put together a dummy address list.
926 We now establish the convention that an addr of zero means
927 no load address was specified. */
933 /* We will modify the main symbol table, make sure that all its users
934 will be cleaned up if an error occurs during symbol reading. */
935 defer_clear_users
.emplace ((symfile_add_flag
) 0);
937 /* Since no error yet, throw away the old symbol table. */
939 if (current_program_space
->symfile_object_file
!= NULL
)
941 current_program_space
->symfile_object_file
->unlink ();
942 gdb_assert (current_program_space
->symfile_object_file
== NULL
);
945 /* Currently we keep symbols from the add-symbol-file command.
946 If the user wants to get rid of them, they should do "symbol-file"
947 without arguments first. Not sure this is the best behavior
950 (*objfile
->sf
->sym_new_init
) (objfile
);
953 /* Convert addr into an offset rather than an absolute address.
954 We find the lowest address of a loaded segment in the objfile,
955 and assume that <addr> is where that got loaded.
957 We no longer warn if the lowest section is not a text segment (as
958 happens for the PA64 port. */
959 if (addrs
->size () > 0)
960 addr_info_make_relative (addrs
, objfile
->obfd
);
962 /* Initialize symbol reading routines for this objfile, allow complaints to
963 appear for this new file, and record how verbose to be, then do the
964 initial symbol reading for this file. */
966 (*objfile
->sf
->sym_init
) (objfile
);
969 (*objfile
->sf
->sym_offsets
) (objfile
, *addrs
);
971 read_symbols (objfile
, add_flags
);
973 /* Discard cleanups as symbol reading was successful. */
975 objfile_holder
.release ();
976 if (defer_clear_users
)
977 defer_clear_users
->release ();
980 /* Same as syms_from_objfile_1, but also initializes the objfile
984 syms_from_objfile (struct objfile
*objfile
,
985 section_addr_info
*addrs
,
986 symfile_add_flags add_flags
)
988 syms_from_objfile_1 (objfile
, addrs
, add_flags
);
989 init_entry_point_info (objfile
);
992 /* Perform required actions after either reading in the initial
993 symbols for a new objfile, or mapping in the symbols from a reusable
994 objfile. ADD_FLAGS is a bitmask of enum symfile_add_flags. */
997 finish_new_objfile (struct objfile
*objfile
, symfile_add_flags add_flags
)
999 /* If this is the main symbol file we have to clean up all users of the
1000 old main symbol file. Otherwise it is sufficient to fixup all the
1001 breakpoints that may have been redefined by this symbol file. */
1002 if (add_flags
& SYMFILE_MAINLINE
)
1004 /* OK, make it the "real" symbol file. */
1005 current_program_space
->symfile_object_file
= objfile
;
1007 clear_symtab_users (add_flags
);
1009 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
1011 breakpoint_re_set ();
1014 /* We're done reading the symbol file; finish off complaints. */
1015 clear_complaints ();
1018 /* Process a symbol file, as either the main file or as a dynamically
1021 ABFD is a BFD already open on the file, as from symfile_bfd_open.
1022 A new reference is acquired by this function.
1024 For NAME description see the objfile constructor.
1026 ADD_FLAGS encodes verbosity, whether this is main symbol file or
1027 extra, such as dynamically loaded code, and what to do with breakpoints.
1029 ADDRS is as described for syms_from_objfile_1, above.
1030 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
1032 PARENT is the original objfile if ABFD is a separate debug info file.
1033 Otherwise PARENT is NULL.
1035 Upon success, returns a pointer to the objfile that was added.
1036 Upon failure, jumps back to command level (never returns). */
1038 static struct objfile
*
1039 symbol_file_add_with_addrs (bfd
*abfd
, const char *name
,
1040 symfile_add_flags add_flags
,
1041 section_addr_info
*addrs
,
1042 objfile_flags flags
, struct objfile
*parent
)
1044 struct objfile
*objfile
;
1045 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
1046 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
1047 const int always_confirm
= add_flags
& SYMFILE_ALWAYS_CONFIRM
;
1048 const int should_print
= (print_symbol_loading_p (from_tty
, mainline
, 1)
1049 && (readnow_symbol_files
1050 || (add_flags
& SYMFILE_NO_READ
) == 0));
1052 if (readnow_symbol_files
)
1054 flags
|= OBJF_READNOW
;
1055 add_flags
&= ~SYMFILE_NO_READ
;
1057 else if (readnever_symbol_files
1058 || (parent
!= NULL
&& (parent
->flags
& OBJF_READNEVER
)))
1060 flags
|= OBJF_READNEVER
;
1061 add_flags
|= SYMFILE_NO_READ
;
1063 if ((add_flags
& SYMFILE_NOT_FILENAME
) != 0)
1064 flags
|= OBJF_NOT_FILENAME
;
1066 /* Give user a chance to burp if ALWAYS_CONFIRM or we'd be
1067 interactively wiping out any existing symbols. */
1071 || ((have_full_symbols () || have_partial_symbols ())
1073 && !query (_("Load new symbol table from \"%s\"? "), name
))
1074 error (_("Not confirmed."));
1077 flags
|= OBJF_MAINLINE
;
1078 objfile
= objfile::make (abfd
, name
, flags
, parent
);
1080 /* We either created a new mapped symbol table, mapped an existing
1081 symbol table file which has not had initial symbol reading
1082 performed, or need to read an unmapped symbol table. */
1085 if (deprecated_pre_add_symbol_hook
)
1086 deprecated_pre_add_symbol_hook (name
);
1088 printf_filtered (_("Reading symbols from %ps...\n"),
1089 styled_string (file_name_style
.style (), name
));
1091 syms_from_objfile (objfile
, addrs
, add_flags
);
1093 /* We now have at least a partial symbol table. Check to see if the
1094 user requested that all symbols be read on initial access via either
1095 the gdb startup command line or on a per symbol file basis. Expand
1096 all partial symbol tables for this objfile if so. */
1098 if ((flags
& OBJF_READNOW
))
1101 printf_filtered (_("Expanding full symbols from %ps...\n"),
1102 styled_string (file_name_style
.style (), name
));
1104 objfile
->expand_all_symtabs ();
1107 /* Note that we only print a message if we have no symbols and have
1108 no separate debug file. If there is a separate debug file which
1109 does not have symbols, we'll have emitted this message for that
1110 file, and so printing it twice is just redundant. */
1111 if (should_print
&& !objfile_has_symbols (objfile
)
1112 && objfile
->separate_debug_objfile
== nullptr)
1113 printf_filtered (_("(No debugging symbols found in %ps)\n"),
1114 styled_string (file_name_style
.style (), name
));
1118 if (deprecated_post_add_symbol_hook
)
1119 deprecated_post_add_symbol_hook ();
1122 /* We print some messages regardless of whether 'from_tty ||
1123 info_verbose' is true, so make sure they go out at the right
1125 gdb_flush (gdb_stdout
);
1127 if (objfile
->sf
== NULL
)
1129 gdb::observers::new_objfile
.notify (objfile
);
1130 return objfile
; /* No symbols. */
1133 finish_new_objfile (objfile
, add_flags
);
1135 gdb::observers::new_objfile
.notify (objfile
);
1137 bfd_cache_close_all ();
1141 /* Add BFD as a separate debug file for OBJFILE. For NAME description
1142 see the objfile constructor. */
1145 symbol_file_add_separate (bfd
*bfd
, const char *name
,
1146 symfile_add_flags symfile_flags
,
1147 struct objfile
*objfile
)
1149 /* Create section_addr_info. We can't directly use offsets from OBJFILE
1150 because sections of BFD may not match sections of OBJFILE and because
1151 vma may have been modified by tools such as prelink. */
1152 section_addr_info sap
= build_section_addr_info_from_objfile (objfile
);
1154 symbol_file_add_with_addrs
1155 (bfd
, name
, symfile_flags
, &sap
,
1156 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
1157 | OBJF_USERLOADED
| OBJF_MAINLINE
),
1161 /* Process the symbol file ABFD, as either the main file or as a
1162 dynamically loaded file.
1163 See symbol_file_add_with_addrs's comments for details. */
1166 symbol_file_add_from_bfd (bfd
*abfd
, const char *name
,
1167 symfile_add_flags add_flags
,
1168 section_addr_info
*addrs
,
1169 objfile_flags flags
, struct objfile
*parent
)
1171 return symbol_file_add_with_addrs (abfd
, name
, add_flags
, addrs
, flags
,
1175 /* Process a symbol file, as either the main file or as a dynamically
1176 loaded file. See symbol_file_add_with_addrs's comments for details. */
1179 symbol_file_add (const char *name
, symfile_add_flags add_flags
,
1180 section_addr_info
*addrs
, objfile_flags flags
)
1182 gdb_bfd_ref_ptr
bfd (symfile_bfd_open (name
));
1184 return symbol_file_add_from_bfd (bfd
.get (), name
, add_flags
, addrs
,
1188 /* Call symbol_file_add() with default values and update whatever is
1189 affected by the loading of a new main().
1190 Used when the file is supplied in the gdb command line
1191 and by some targets with special loading requirements.
1192 The auxiliary function, symbol_file_add_main_1(), has the flags
1193 argument for the switches that can only be specified in the symbol_file
1197 symbol_file_add_main (const char *args
, symfile_add_flags add_flags
)
1199 symbol_file_add_main_1 (args
, add_flags
, 0, 0);
1203 symbol_file_add_main_1 (const char *args
, symfile_add_flags add_flags
,
1204 objfile_flags flags
, CORE_ADDR reloff
)
1206 add_flags
|= current_inferior ()->symfile_flags
| SYMFILE_MAINLINE
;
1208 struct objfile
*objfile
= symbol_file_add (args
, add_flags
, NULL
, flags
);
1210 objfile_rebase (objfile
, reloff
);
1212 /* Getting new symbols may change our opinion about
1213 what is frameless. */
1214 reinit_frame_cache ();
1216 if ((add_flags
& SYMFILE_NO_READ
) == 0)
1217 set_initial_language ();
1221 symbol_file_clear (int from_tty
)
1223 if ((have_full_symbols () || have_partial_symbols ())
1225 && (current_program_space
->symfile_object_file
1226 ? !query (_("Discard symbol table from `%s'? "),
1227 objfile_name (current_program_space
->symfile_object_file
))
1228 : !query (_("Discard symbol table? "))))
1229 error (_("Not confirmed."));
1231 /* solib descriptors may have handles to objfiles. Wipe them before their
1232 objfiles get stale by free_all_objfiles. */
1233 no_shared_libraries (NULL
, from_tty
);
1235 current_program_space
->free_all_objfiles ();
1237 clear_symtab_users (0);
1239 gdb_assert (current_program_space
->symfile_object_file
== NULL
);
1241 printf_filtered (_("No symbol file now.\n"));
1244 /* See symfile.h. */
1246 bool separate_debug_file_debug
= false;
1249 separate_debug_file_exists (const std::string
&name
, unsigned long crc
,
1250 struct objfile
*parent_objfile
)
1252 unsigned long file_crc
;
1254 struct stat parent_stat
, abfd_stat
;
1255 int verified_as_different
;
1257 /* Find a separate debug info file as if symbols would be present in
1258 PARENT_OBJFILE itself this function would not be called. .gnu_debuglink
1259 section can contain just the basename of PARENT_OBJFILE without any
1260 ".debug" suffix as "/usr/lib/debug/path/to/file" is a separate tree where
1261 the separate debug infos with the same basename can exist. */
1263 if (filename_cmp (name
.c_str (), objfile_name (parent_objfile
)) == 0)
1266 if (separate_debug_file_debug
)
1268 printf_filtered (_(" Trying %s..."), name
.c_str ());
1269 gdb_flush (gdb_stdout
);
1272 gdb_bfd_ref_ptr
abfd (gdb_bfd_open (name
.c_str (), gnutarget
));
1276 if (separate_debug_file_debug
)
1277 printf_filtered (_(" no, unable to open.\n"));
1282 /* Verify symlinks were not the cause of filename_cmp name difference above.
1284 Some operating systems, e.g. Windows, do not provide a meaningful
1285 st_ino; they always set it to zero. (Windows does provide a
1286 meaningful st_dev.) Files accessed from gdbservers that do not
1287 support the vFile:fstat packet will also have st_ino set to zero.
1288 Do not indicate a duplicate library in either case. While there
1289 is no guarantee that a system that provides meaningful inode
1290 numbers will never set st_ino to zero, this is merely an
1291 optimization, so we do not need to worry about false negatives. */
1293 if (bfd_stat (abfd
.get (), &abfd_stat
) == 0
1294 && abfd_stat
.st_ino
!= 0
1295 && bfd_stat (parent_objfile
->obfd
, &parent_stat
) == 0)
1297 if (abfd_stat
.st_dev
== parent_stat
.st_dev
1298 && abfd_stat
.st_ino
== parent_stat
.st_ino
)
1300 if (separate_debug_file_debug
)
1301 printf_filtered (_(" no, same file as the objfile.\n"));
1305 verified_as_different
= 1;
1308 verified_as_different
= 0;
1310 file_crc_p
= gdb_bfd_crc (abfd
.get (), &file_crc
);
1314 if (separate_debug_file_debug
)
1315 printf_filtered (_(" no, error computing CRC.\n"));
1320 if (crc
!= file_crc
)
1322 unsigned long parent_crc
;
1324 /* If the files could not be verified as different with
1325 bfd_stat then we need to calculate the parent's CRC
1326 to verify whether the files are different or not. */
1328 if (!verified_as_different
)
1330 if (!gdb_bfd_crc (parent_objfile
->obfd
, &parent_crc
))
1332 if (separate_debug_file_debug
)
1333 printf_filtered (_(" no, error computing CRC.\n"));
1339 if (verified_as_different
|| parent_crc
!= file_crc
)
1340 warning (_("the debug information found in \"%s\""
1341 " does not match \"%s\" (CRC mismatch).\n"),
1342 name
.c_str (), objfile_name (parent_objfile
));
1344 if (separate_debug_file_debug
)
1345 printf_filtered (_(" no, CRC doesn't match.\n"));
1350 if (separate_debug_file_debug
)
1351 printf_filtered (_(" yes!\n"));
1356 char *debug_file_directory
= NULL
;
1358 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1359 struct cmd_list_element
*c
, const char *value
)
1361 fprintf_filtered (file
,
1362 _("The directory where separate debug "
1363 "symbols are searched for is \"%s\".\n"),
1367 #if ! defined (DEBUG_SUBDIRECTORY)
1368 #define DEBUG_SUBDIRECTORY ".debug"
1371 /* Find a separate debuginfo file for OBJFILE, using DIR as the directory
1372 where the original file resides (may not be the same as
1373 dirname(objfile->name) due to symlinks), and DEBUGLINK as the file we are
1374 looking for. CANON_DIR is the "realpath" form of DIR.
1375 DIR must contain a trailing '/'.
1376 Returns the path of the file with separate debug info, or an empty
1380 find_separate_debug_file (const char *dir
,
1381 const char *canon_dir
,
1382 const char *debuglink
,
1383 unsigned long crc32
, struct objfile
*objfile
)
1385 if (separate_debug_file_debug
)
1386 printf_filtered (_("\nLooking for separate debug info (debug link) for "
1387 "%s\n"), objfile_name (objfile
));
1389 /* First try in the same directory as the original file. */
1390 std::string debugfile
= dir
;
1391 debugfile
+= debuglink
;
1393 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1396 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1398 debugfile
+= DEBUG_SUBDIRECTORY
;
1400 debugfile
+= debuglink
;
1402 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1405 /* Then try in the global debugfile directories.
1407 Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
1408 cause "/..." lookups. */
1410 bool target_prefix
= startswith (dir
, "target:");
1411 const char *dir_notarget
= target_prefix
? dir
+ strlen ("target:") : dir
;
1412 std::vector
<gdb::unique_xmalloc_ptr
<char>> debugdir_vec
1413 = dirnames_to_char_ptr_vec (debug_file_directory
);
1414 gdb::unique_xmalloc_ptr
<char> canon_sysroot
= gdb_realpath (gdb_sysroot
);
1416 /* MS-Windows/MS-DOS don't allow colons in file names; we must
1417 convert the drive letter into a one-letter directory, so that the
1418 file name resulting from splicing below will be valid.
1420 FIXME: The below only works when GDB runs on MS-Windows/MS-DOS.
1421 There are various remote-debugging scenarios where such a
1422 transformation of the drive letter might be required when GDB runs
1423 on a Posix host, see
1425 https://sourceware.org/ml/gdb-patches/2019-04/msg00605.html
1427 If some of those scenarios need to be supported, we will need to
1428 use a different condition for HAS_DRIVE_SPEC and a different macro
1429 instead of STRIP_DRIVE_SPEC, which work on Posix systems as well. */
1431 if (HAS_DRIVE_SPEC (dir_notarget
))
1433 drive
= dir_notarget
[0];
1434 dir_notarget
= STRIP_DRIVE_SPEC (dir_notarget
);
1437 for (const gdb::unique_xmalloc_ptr
<char> &debugdir
: debugdir_vec
)
1439 debugfile
= target_prefix
? "target:" : "";
1440 debugfile
+= debugdir
.get ();
1443 debugfile
+= dir_notarget
;
1444 debugfile
+= debuglink
;
1446 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1449 const char *base_path
= NULL
;
1450 if (canon_dir
!= NULL
)
1452 if (canon_sysroot
.get () != NULL
)
1453 base_path
= child_path (canon_sysroot
.get (), canon_dir
);
1455 base_path
= child_path (gdb_sysroot
, canon_dir
);
1457 if (base_path
!= NULL
)
1459 /* If the file is in the sysroot, try using its base path in
1460 the global debugfile directory. */
1461 debugfile
= target_prefix
? "target:" : "";
1462 debugfile
+= debugdir
.get ();
1464 debugfile
+= base_path
;
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 ();
1477 debugfile
+= base_path
;
1479 debugfile
+= debuglink
;
1481 if (separate_debug_file_exists (debugfile
, crc32
, objfile
))
1487 return std::string ();
1490 /* Modify PATH to contain only "[/]directory/" part of PATH.
1491 If there were no directory separators in PATH, PATH will be empty
1492 string on return. */
1495 terminate_after_last_dir_separator (char *path
)
1499 /* Strip off the final filename part, leaving the directory name,
1500 followed by a slash. The directory can be relative or absolute. */
1501 for (i
= strlen(path
) - 1; i
>= 0; i
--)
1502 if (IS_DIR_SEPARATOR (path
[i
]))
1505 /* If I is -1 then no directory is present there and DIR will be "". */
1509 /* Find separate debuginfo for OBJFILE (using .gnu_debuglink section).
1510 Returns pathname, or an empty string. */
1513 find_separate_debug_file_by_debuglink (struct objfile
*objfile
)
1515 unsigned long crc32
;
1517 gdb::unique_xmalloc_ptr
<char> debuglink
1518 (bfd_get_debug_link_info (objfile
->obfd
, &crc32
));
1520 if (debuglink
== NULL
)
1522 /* There's no separate debug info, hence there's no way we could
1523 load it => no warning. */
1524 return std::string ();
1527 std::string dir
= objfile_name (objfile
);
1528 terminate_after_last_dir_separator (&dir
[0]);
1529 gdb::unique_xmalloc_ptr
<char> canon_dir (lrealpath (dir
.c_str ()));
1531 std::string debugfile
1532 = find_separate_debug_file (dir
.c_str (), canon_dir
.get (),
1533 debuglink
.get (), crc32
, objfile
);
1535 if (debugfile
.empty ())
1537 /* For PR gdb/9538, try again with realpath (if different from the
1542 if (lstat (objfile_name (objfile
), &st_buf
) == 0
1543 && S_ISLNK (st_buf
.st_mode
))
1545 gdb::unique_xmalloc_ptr
<char> symlink_dir
1546 (lrealpath (objfile_name (objfile
)));
1547 if (symlink_dir
!= NULL
)
1549 terminate_after_last_dir_separator (symlink_dir
.get ());
1550 if (dir
!= symlink_dir
.get ())
1552 /* Different directory, so try using it. */
1553 debugfile
= find_separate_debug_file (symlink_dir
.get (),
1566 /* Make sure that OBJF_{READNOW,READNEVER} are not set
1570 validate_readnow_readnever (objfile_flags flags
)
1572 if ((flags
& OBJF_READNOW
) && (flags
& OBJF_READNEVER
))
1573 error (_("-readnow and -readnever cannot be used simultaneously"));
1576 /* This is the symbol-file command. Read the file, analyze its
1577 symbols, and add a struct symtab to a symtab list. The syntax of
1578 the command is rather bizarre:
1580 1. The function buildargv implements various quoting conventions
1581 which are undocumented and have little or nothing in common with
1582 the way things are quoted (or not quoted) elsewhere in GDB.
1584 2. Options are used, which are not generally used in GDB (perhaps
1585 "set mapped on", "set readnow on" would be better)
1587 3. The order of options matters, which is contrary to GNU
1588 conventions (because it is confusing and inconvenient). */
1591 symbol_file_command (const char *args
, int from_tty
)
1597 symbol_file_clear (from_tty
);
1601 objfile_flags flags
= OBJF_USERLOADED
;
1602 symfile_add_flags add_flags
= 0;
1604 bool stop_processing_options
= false;
1605 CORE_ADDR offset
= 0;
1610 add_flags
|= SYMFILE_VERBOSE
;
1612 gdb_argv
built_argv (args
);
1613 for (arg
= built_argv
[0], idx
= 0; arg
!= NULL
; arg
= built_argv
[++idx
])
1615 if (stop_processing_options
|| *arg
!= '-')
1620 error (_("Unrecognized argument \"%s\""), arg
);
1622 else if (strcmp (arg
, "-readnow") == 0)
1623 flags
|= OBJF_READNOW
;
1624 else if (strcmp (arg
, "-readnever") == 0)
1625 flags
|= OBJF_READNEVER
;
1626 else if (strcmp (arg
, "-o") == 0)
1628 arg
= built_argv
[++idx
];
1630 error (_("Missing argument to -o"));
1632 offset
= parse_and_eval_address (arg
);
1634 else if (strcmp (arg
, "--") == 0)
1635 stop_processing_options
= true;
1637 error (_("Unrecognized argument \"%s\""), arg
);
1641 error (_("no symbol file name was specified"));
1643 validate_readnow_readnever (flags
);
1645 /* Set SYMFILE_DEFER_BP_RESET because the proper displacement for a PIE
1646 (Position Independent Executable) main symbol file will only be
1647 computed by the solib_create_inferior_hook below. Without it,
1648 breakpoint_re_set would fail to insert the breakpoints with the zero
1650 add_flags
|= SYMFILE_DEFER_BP_RESET
;
1652 symbol_file_add_main_1 (name
, add_flags
, flags
, offset
);
1654 solib_create_inferior_hook (from_tty
);
1656 /* Now it's safe to re-add the breakpoints. */
1657 breakpoint_re_set ();
1661 /* Set the initial language. */
1664 set_initial_language (void)
1666 if (language_mode
== language_mode_manual
)
1668 enum language lang
= main_language ();
1669 /* Make C the default language. */
1670 enum language default_lang
= language_c
;
1672 if (lang
== language_unknown
)
1674 const char *name
= main_name ();
1676 = lookup_symbol_in_language (name
, NULL
, VAR_DOMAIN
, default_lang
,
1680 lang
= sym
->language ();
1683 if (lang
== language_unknown
)
1685 lang
= default_lang
;
1688 set_language (lang
);
1689 expected_language
= current_language
; /* Don't warn the user. */
1692 /* Open the file specified by NAME and hand it off to BFD for
1693 preliminary analysis. Return a newly initialized bfd *, which
1694 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1695 absolute). In case of trouble, error() is called. */
1698 symfile_bfd_open (const char *name
)
1702 gdb::unique_xmalloc_ptr
<char> absolute_name
;
1703 if (!is_target_filename (name
))
1705 gdb::unique_xmalloc_ptr
<char> expanded_name (tilde_expand (name
));
1707 /* Look down path for it, allocate 2nd new malloc'd copy. */
1708 desc
= openp (getenv ("PATH"),
1709 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1710 expanded_name
.get (), O_RDONLY
| O_BINARY
, &absolute_name
);
1711 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1714 char *exename
= (char *) alloca (strlen (expanded_name
.get ()) + 5);
1716 strcat (strcpy (exename
, expanded_name
.get ()), ".exe");
1717 desc
= openp (getenv ("PATH"),
1718 OPF_TRY_CWD_FIRST
| OPF_RETURN_REALPATH
,
1719 exename
, O_RDONLY
| O_BINARY
, &absolute_name
);
1723 perror_with_name (expanded_name
.get ());
1725 name
= absolute_name
.get ();
1728 gdb_bfd_ref_ptr
sym_bfd (gdb_bfd_open (name
, gnutarget
, desc
));
1729 if (sym_bfd
== NULL
)
1730 error (_("`%s': can't open to read symbols: %s."), name
,
1731 bfd_errmsg (bfd_get_error ()));
1733 if (!gdb_bfd_has_target_filename (sym_bfd
.get ()))
1734 bfd_set_cacheable (sym_bfd
.get (), 1);
1736 if (!bfd_check_format (sym_bfd
.get (), bfd_object
))
1737 error (_("`%s': can't read symbols: %s."), name
,
1738 bfd_errmsg (bfd_get_error ()));
1743 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1744 the section was not found. */
1747 get_section_index (struct objfile
*objfile
, const char *section_name
)
1749 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1757 /* Link SF into the global symtab_fns list.
1758 FLAVOUR is the file format that SF handles.
1759 Called on startup by the _initialize routine in each object file format
1760 reader, to register information about each format the reader is prepared
1764 add_symtab_fns (enum bfd_flavour flavour
, const struct sym_fns
*sf
)
1766 symtab_fns
.emplace_back (flavour
, sf
);
1769 /* Initialize OBJFILE to read symbols from its associated BFD. It
1770 either returns or calls error(). The result is an initialized
1771 struct sym_fns in the objfile structure, that contains cached
1772 information about the symbol file. */
1774 static const struct sym_fns
*
1775 find_sym_fns (bfd
*abfd
)
1777 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1779 if (our_flavour
== bfd_target_srec_flavour
1780 || our_flavour
== bfd_target_ihex_flavour
1781 || our_flavour
== bfd_target_tekhex_flavour
)
1782 return NULL
; /* No symbols. */
1784 for (const registered_sym_fns
&rsf
: symtab_fns
)
1785 if (our_flavour
== rsf
.sym_flavour
)
1788 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1789 bfd_get_target (abfd
));
1793 /* This function runs the load command of our current target. */
1796 load_command (const char *arg
, int from_tty
)
1800 /* The user might be reloading because the binary has changed. Take
1801 this opportunity to check. */
1802 reopen_exec_file ();
1808 const char *parg
, *prev
;
1810 arg
= get_exec_file (1);
1812 /* We may need to quote this string so buildargv can pull it
1815 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1817 temp
.append (prev
, parg
- prev
);
1819 temp
.push_back ('\\');
1821 /* If we have not copied anything yet, then we didn't see a
1822 character to quote, and we can just leave ARG unchanged. */
1826 arg
= temp
.c_str ();
1830 target_load (arg
, from_tty
);
1832 /* After re-loading the executable, we don't really know which
1833 overlays are mapped any more. */
1834 overlay_cache_invalid
= 1;
1837 /* This version of "load" should be usable for any target. Currently
1838 it is just used for remote targets, not inftarg.c or core files,
1839 on the theory that only in that case is it useful.
1841 Avoiding xmodem and the like seems like a win (a) because we don't have
1842 to worry about finding it, and (b) On VMS, fork() is very slow and so
1843 we don't want to run a subprocess. On the other hand, I'm not sure how
1844 performance compares. */
1846 static int validate_download
= 0;
1848 /* Opaque data for load_progress. */
1849 struct load_progress_data
1851 /* Cumulative data. */
1852 unsigned long write_count
= 0;
1853 unsigned long data_count
= 0;
1854 bfd_size_type total_size
= 0;
1857 /* Opaque data for load_progress for a single section. */
1858 struct load_progress_section_data
1860 load_progress_section_data (load_progress_data
*cumulative_
,
1861 const char *section_name_
, ULONGEST section_size_
,
1862 CORE_ADDR lma_
, gdb_byte
*buffer_
)
1863 : cumulative (cumulative_
), section_name (section_name_
),
1864 section_size (section_size_
), lma (lma_
), buffer (buffer_
)
1867 struct load_progress_data
*cumulative
;
1869 /* Per-section data. */
1870 const char *section_name
;
1871 ULONGEST section_sent
= 0;
1872 ULONGEST section_size
;
1877 /* Opaque data for load_section_callback. */
1878 struct load_section_data
1880 load_section_data (load_progress_data
*progress_data_
)
1881 : progress_data (progress_data_
)
1884 ~load_section_data ()
1886 for (auto &&request
: requests
)
1888 xfree (request
.data
);
1889 delete ((load_progress_section_data
*) request
.baton
);
1893 CORE_ADDR load_offset
= 0;
1894 struct load_progress_data
*progress_data
;
1895 std::vector
<struct memory_write_request
> requests
;
1898 /* Target write callback routine for progress reporting. */
1901 load_progress (ULONGEST bytes
, void *untyped_arg
)
1903 struct load_progress_section_data
*args
1904 = (struct load_progress_section_data
*) untyped_arg
;
1905 struct load_progress_data
*totals
;
1908 /* Writing padding data. No easy way to get at the cumulative
1909 stats, so just ignore this. */
1912 totals
= args
->cumulative
;
1914 if (bytes
== 0 && args
->section_sent
== 0)
1916 /* The write is just starting. Let the user know we've started
1918 current_uiout
->message ("Loading section %s, size %s lma %s\n",
1920 hex_string (args
->section_size
),
1921 paddress (target_gdbarch (), args
->lma
));
1925 if (validate_download
)
1927 /* Broken memories and broken monitors manifest themselves here
1928 when bring new computers to life. This doubles already slow
1930 /* NOTE: cagney/1999-10-18: A more efficient implementation
1931 might add a verify_memory() method to the target vector and
1932 then use that. remote.c could implement that method using
1933 the ``qCRC'' packet. */
1934 gdb::byte_vector
check (bytes
);
1936 if (target_read_memory (args
->lma
, check
.data (), bytes
) != 0)
1937 error (_("Download verify read failed at %s"),
1938 paddress (target_gdbarch (), args
->lma
));
1939 if (memcmp (args
->buffer
, check
.data (), bytes
) != 0)
1940 error (_("Download verify compare failed at %s"),
1941 paddress (target_gdbarch (), args
->lma
));
1943 totals
->data_count
+= bytes
;
1945 args
->buffer
+= bytes
;
1946 totals
->write_count
+= 1;
1947 args
->section_sent
+= bytes
;
1948 if (check_quit_flag ()
1949 || (deprecated_ui_load_progress_hook
!= NULL
1950 && deprecated_ui_load_progress_hook (args
->section_name
,
1951 args
->section_sent
)))
1952 error (_("Canceled the download"));
1954 if (deprecated_show_load_progress
!= NULL
)
1955 deprecated_show_load_progress (args
->section_name
,
1959 totals
->total_size
);
1962 /* Service function for generic_load. */
1965 load_one_section (bfd
*abfd
, asection
*asec
,
1966 struct load_section_data
*args
)
1968 bfd_size_type size
= bfd_section_size (asec
);
1969 const char *sect_name
= bfd_section_name (asec
);
1971 if ((bfd_section_flags (asec
) & SEC_LOAD
) == 0)
1977 ULONGEST begin
= bfd_section_lma (asec
) + args
->load_offset
;
1978 ULONGEST end
= begin
+ size
;
1979 gdb_byte
*buffer
= (gdb_byte
*) xmalloc (size
);
1980 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1982 load_progress_section_data
*section_data
1983 = new load_progress_section_data (args
->progress_data
, sect_name
, size
,
1986 args
->requests
.emplace_back (begin
, end
, buffer
, section_data
);
1989 static void print_transfer_performance (struct ui_file
*stream
,
1990 unsigned long data_count
,
1991 unsigned long write_count
,
1992 std::chrono::steady_clock::duration d
);
1994 /* See symfile.h. */
1997 generic_load (const char *args
, int from_tty
)
1999 struct load_progress_data total_progress
;
2000 struct load_section_data
cbdata (&total_progress
);
2001 struct ui_out
*uiout
= current_uiout
;
2004 error_no_arg (_("file to load"));
2006 gdb_argv
argv (args
);
2008 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2010 if (argv
[1] != NULL
)
2014 cbdata
.load_offset
= strtoulst (argv
[1], &endptr
, 0);
2016 /* If the last word was not a valid number then
2017 treat it as a file name with spaces in. */
2018 if (argv
[1] == endptr
)
2019 error (_("Invalid download offset:%s."), argv
[1]);
2021 if (argv
[2] != NULL
)
2022 error (_("Too many parameters."));
2025 /* Open the file for loading. */
2026 gdb_bfd_ref_ptr
loadfile_bfd (gdb_bfd_open (filename
.get (), gnutarget
));
2027 if (loadfile_bfd
== NULL
)
2028 perror_with_name (filename
.get ());
2030 if (!bfd_check_format (loadfile_bfd
.get (), bfd_object
))
2032 error (_("\"%s\" is not an object file: %s"), filename
.get (),
2033 bfd_errmsg (bfd_get_error ()));
2036 for (asection
*asec
: gdb_bfd_sections (loadfile_bfd
))
2037 total_progress
.total_size
+= bfd_section_size (asec
);
2039 for (asection
*asec
: gdb_bfd_sections (loadfile_bfd
))
2040 load_one_section (loadfile_bfd
.get (), asec
, &cbdata
);
2042 using namespace std::chrono
;
2044 steady_clock::time_point start_time
= steady_clock::now ();
2046 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
2047 load_progress
) != 0)
2048 error (_("Load failed"));
2050 steady_clock::time_point end_time
= steady_clock::now ();
2052 CORE_ADDR entry
= bfd_get_start_address (loadfile_bfd
.get ());
2053 entry
= gdbarch_addr_bits_remove (target_gdbarch (), entry
);
2054 uiout
->text ("Start address ");
2055 uiout
->field_core_addr ("address", target_gdbarch (), entry
);
2056 uiout
->text (", load size ");
2057 uiout
->field_unsigned ("load-size", total_progress
.data_count
);
2059 regcache_write_pc (get_current_regcache (), entry
);
2061 /* Reset breakpoints, now that we have changed the load image. For
2062 instance, breakpoints may have been set (or reset, by
2063 post_create_inferior) while connected to the target but before we
2064 loaded the program. In that case, the prologue analyzer could
2065 have read instructions from the target to find the right
2066 breakpoint locations. Loading has changed the contents of that
2069 breakpoint_re_set ();
2071 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2072 total_progress
.write_count
,
2073 end_time
- start_time
);
2076 /* Report on STREAM the performance of a memory transfer operation,
2077 such as 'load'. DATA_COUNT is the number of bytes transferred.
2078 WRITE_COUNT is the number of separate write operations, or 0, if
2079 that information is not available. TIME is how long the operation
2083 print_transfer_performance (struct ui_file
*stream
,
2084 unsigned long data_count
,
2085 unsigned long write_count
,
2086 std::chrono::steady_clock::duration time
)
2088 using namespace std::chrono
;
2089 struct ui_out
*uiout
= current_uiout
;
2091 milliseconds ms
= duration_cast
<milliseconds
> (time
);
2093 uiout
->text ("Transfer rate: ");
2094 if (ms
.count () > 0)
2096 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / ms
.count ();
2098 if (uiout
->is_mi_like_p ())
2100 uiout
->field_unsigned ("transfer-rate", rate
* 8);
2101 uiout
->text (" bits/sec");
2103 else if (rate
< 1024)
2105 uiout
->field_unsigned ("transfer-rate", rate
);
2106 uiout
->text (" bytes/sec");
2110 uiout
->field_unsigned ("transfer-rate", rate
/ 1024);
2111 uiout
->text (" KB/sec");
2116 uiout
->field_unsigned ("transferred-bits", (data_count
* 8));
2117 uiout
->text (" bits in <1 sec");
2119 if (write_count
> 0)
2122 uiout
->field_unsigned ("write-rate", data_count
/ write_count
);
2123 uiout
->text (" bytes/write");
2125 uiout
->text (".\n");
2128 /* Add an OFFSET to the start address of each section in OBJF, except
2129 sections that were specified in ADDRS. */
2132 set_objfile_default_section_offset (struct objfile
*objf
,
2133 const section_addr_info
&addrs
,
2136 /* Add OFFSET to all sections by default. */
2137 section_offsets
offsets (objf
->section_offsets
.size (), offset
);
2139 /* Create sorted lists of all sections in ADDRS as well as all
2140 sections in OBJF. */
2142 std::vector
<const struct other_sections
*> addrs_sorted
2143 = addrs_section_sort (addrs
);
2145 section_addr_info objf_addrs
2146 = build_section_addr_info_from_objfile (objf
);
2147 std::vector
<const struct other_sections
*> objf_addrs_sorted
2148 = addrs_section_sort (objf_addrs
);
2150 /* Walk the BFD section list, and if a matching section is found in
2151 ADDRS_SORTED_LIST, set its offset to zero to keep its address
2154 Note that both lists may contain multiple sections with the same
2155 name, and then the sections from ADDRS are matched in BFD order
2156 (thanks to sectindex). */
2158 std::vector
<const struct other_sections
*>::iterator addrs_sorted_iter
2159 = addrs_sorted
.begin ();
2160 for (const other_sections
*objf_sect
: objf_addrs_sorted
)
2162 const char *objf_name
= addr_section_name (objf_sect
->name
.c_str ());
2165 while (cmp
< 0 && addrs_sorted_iter
!= addrs_sorted
.end ())
2167 const struct other_sections
*sect
= *addrs_sorted_iter
;
2168 const char *sect_name
= addr_section_name (sect
->name
.c_str ());
2169 cmp
= strcmp (sect_name
, objf_name
);
2171 ++addrs_sorted_iter
;
2175 offsets
[objf_sect
->sectindex
] = 0;
2178 /* Apply the new section offsets. */
2179 objfile_relocate (objf
, offsets
);
2182 /* This function allows the addition of incrementally linked object files.
2183 It does not modify any state in the target, only in the debugger. */
2186 add_symbol_file_command (const char *args
, int from_tty
)
2188 struct gdbarch
*gdbarch
= get_current_arch ();
2189 gdb::unique_xmalloc_ptr
<char> filename
;
2192 struct objfile
*objf
;
2193 objfile_flags flags
= OBJF_USERLOADED
| OBJF_SHARED
;
2194 symfile_add_flags add_flags
= 0;
2197 add_flags
|= SYMFILE_VERBOSE
;
2205 std::vector
<sect_opt
> sect_opts
= { { ".text", NULL
} };
2206 bool stop_processing_options
= false;
2207 CORE_ADDR offset
= 0;
2212 error (_("add-symbol-file takes a file name and an address"));
2214 bool seen_addr
= false;
2215 bool seen_offset
= false;
2216 gdb_argv
argv (args
);
2218 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2220 if (stop_processing_options
|| *arg
!= '-')
2222 if (filename
== NULL
)
2224 /* First non-option argument is always the filename. */
2225 filename
.reset (tilde_expand (arg
));
2227 else if (!seen_addr
)
2229 /* The second non-option argument is always the text
2230 address at which to load the program. */
2231 sect_opts
[0].value
= arg
;
2235 error (_("Unrecognized argument \"%s\""), arg
);
2237 else if (strcmp (arg
, "-readnow") == 0)
2238 flags
|= OBJF_READNOW
;
2239 else if (strcmp (arg
, "-readnever") == 0)
2240 flags
|= OBJF_READNEVER
;
2241 else if (strcmp (arg
, "-s") == 0)
2243 if (argv
[argcnt
+ 1] == NULL
)
2244 error (_("Missing section name after \"-s\""));
2245 else if (argv
[argcnt
+ 2] == NULL
)
2246 error (_("Missing section address after \"-s\""));
2248 sect_opt sect
= { argv
[argcnt
+ 1], argv
[argcnt
+ 2] };
2250 sect_opts
.push_back (sect
);
2253 else if (strcmp (arg
, "-o") == 0)
2255 arg
= argv
[++argcnt
];
2257 error (_("Missing argument to -o"));
2259 offset
= parse_and_eval_address (arg
);
2262 else if (strcmp (arg
, "--") == 0)
2263 stop_processing_options
= true;
2265 error (_("Unrecognized argument \"%s\""), arg
);
2268 if (filename
== NULL
)
2269 error (_("You must provide a filename to be loaded."));
2271 validate_readnow_readnever (flags
);
2273 /* Print the prompt for the query below. And save the arguments into
2274 a sect_addr_info structure to be passed around to other
2275 functions. We have to split this up into separate print
2276 statements because hex_string returns a local static
2279 printf_unfiltered (_("add symbol table from file \"%s\""),
2281 section_addr_info section_addrs
;
2282 std::vector
<sect_opt
>::const_iterator it
= sect_opts
.begin ();
2285 for (; it
!= sect_opts
.end (); ++it
)
2288 const char *val
= it
->value
;
2289 const char *sec
= it
->name
;
2291 if (section_addrs
.empty ())
2292 printf_unfiltered (_(" at\n"));
2293 addr
= parse_and_eval_address (val
);
2295 /* Here we store the section offsets in the order they were
2296 entered on the command line. Every array element is
2297 assigned an ascending section index to preserve the above
2298 order over an unstable sorting algorithm. This dummy
2299 index is not used for any other purpose.
2301 section_addrs
.emplace_back (addr
, sec
, section_addrs
.size ());
2302 printf_filtered ("\t%s_addr = %s\n", sec
,
2303 paddress (gdbarch
, addr
));
2305 /* The object's sections are initialized when a
2306 call is made to build_objfile_section_table (objfile).
2307 This happens in reread_symbols.
2308 At this point, we don't know what file type this is,
2309 so we can't determine what section names are valid. */
2312 printf_unfiltered (_("%s offset by %s\n"),
2313 (section_addrs
.empty ()
2314 ? _(" with all sections")
2315 : _("with other sections")),
2316 paddress (gdbarch
, offset
));
2317 else if (section_addrs
.empty ())
2318 printf_unfiltered ("\n");
2320 if (from_tty
&& (!query ("%s", "")))
2321 error (_("Not confirmed."));
2323 objf
= symbol_file_add (filename
.get (), add_flags
, §ion_addrs
,
2325 if (!objfile_has_symbols (objf
) && objf
->per_bfd
->minimal_symbol_count
<= 0)
2326 warning (_("newly-added symbol file \"%s\" does not provide any symbols"),
2330 set_objfile_default_section_offset (objf
, section_addrs
, offset
);
2332 current_program_space
->add_target_sections (objf
);
2334 /* Getting new symbols may change our opinion about what is
2336 reinit_frame_cache ();
2340 /* This function removes a symbol file that was added via add-symbol-file. */
2343 remove_symbol_file_command (const char *args
, int from_tty
)
2345 struct objfile
*objf
= NULL
;
2346 struct program_space
*pspace
= current_program_space
;
2351 error (_("remove-symbol-file: no symbol file provided"));
2353 gdb_argv
argv (args
);
2355 if (strcmp (argv
[0], "-a") == 0)
2357 /* Interpret the next argument as an address. */
2360 if (argv
[1] == NULL
)
2361 error (_("Missing address argument"));
2363 if (argv
[2] != NULL
)
2364 error (_("Junk after %s"), argv
[1]);
2366 addr
= parse_and_eval_address (argv
[1]);
2368 for (objfile
*objfile
: current_program_space
->objfiles ())
2370 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2371 && (objfile
->flags
& OBJF_SHARED
) != 0
2372 && objfile
->pspace
== pspace
2373 && is_addr_in_objfile (addr
, objfile
))
2380 else if (argv
[0] != NULL
)
2382 /* Interpret the current argument as a file name. */
2384 if (argv
[1] != NULL
)
2385 error (_("Junk after %s"), argv
[0]);
2387 gdb::unique_xmalloc_ptr
<char> filename (tilde_expand (argv
[0]));
2389 for (objfile
*objfile
: current_program_space
->objfiles ())
2391 if ((objfile
->flags
& OBJF_USERLOADED
) != 0
2392 && (objfile
->flags
& OBJF_SHARED
) != 0
2393 && objfile
->pspace
== pspace
2394 && filename_cmp (filename
.get (), objfile_name (objfile
)) == 0)
2403 error (_("No symbol file found"));
2406 && !query (_("Remove symbol table from file \"%s\"? "),
2407 objfile_name (objf
)))
2408 error (_("Not confirmed."));
2411 clear_symtab_users (0);
2414 /* Re-read symbols if a symbol-file has changed. */
2417 reread_symbols (void)
2420 struct stat new_statbuf
;
2422 std::vector
<struct objfile
*> new_objfiles
;
2424 for (objfile
*objfile
: current_program_space
->objfiles ())
2426 if (objfile
->obfd
== NULL
)
2429 /* Separate debug objfiles are handled in the main objfile. */
2430 if (objfile
->separate_debug_objfile_backlink
)
2433 /* If this object is from an archive (what you usually create with
2434 `ar', often called a `static library' on most systems, though
2435 a `shared library' on AIX is also an archive), then you should
2436 stat on the archive name, not member name. */
2437 if (objfile
->obfd
->my_archive
)
2438 res
= stat (bfd_get_filename (objfile
->obfd
->my_archive
), &new_statbuf
);
2440 res
= stat (objfile_name (objfile
), &new_statbuf
);
2443 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2444 printf_filtered (_("`%s' has disappeared; keeping its symbols.\n"),
2445 objfile_name (objfile
));
2448 new_modtime
= new_statbuf
.st_mtime
;
2449 if (new_modtime
!= objfile
->mtime
)
2451 printf_filtered (_("`%s' has changed; re-reading symbols.\n"),
2452 objfile_name (objfile
));
2454 /* There are various functions like symbol_file_add,
2455 symfile_bfd_open, syms_from_objfile, etc., which might
2456 appear to do what we want. But they have various other
2457 effects which we *don't* want. So we just do stuff
2458 ourselves. We don't worry about mapped files (for one thing,
2459 any mapped file will be out of date). */
2461 /* If we get an error, blow away this objfile (not sure if
2462 that is the correct response for things like shared
2464 objfile_up
objfile_holder (objfile
);
2466 /* We need to do this whenever any symbols go away. */
2467 clear_symtab_users_cleanup
defer_clear_users (0);
2469 if (current_program_space
->exec_bfd () != NULL
2470 && filename_cmp (bfd_get_filename (objfile
->obfd
),
2471 bfd_get_filename (current_program_space
->exec_bfd ())) == 0)
2473 /* Reload EXEC_BFD without asking anything. */
2475 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2478 /* Keep the calls order approx. the same as in free_objfile. */
2480 /* Free the separate debug objfiles. It will be
2481 automatically recreated by sym_read. */
2482 free_objfile_separate_debug (objfile
);
2484 /* Clear the stale source cache. */
2485 forget_cached_source_info ();
2487 /* Remove any references to this objfile in the global
2489 preserve_values (objfile
);
2491 /* Nuke all the state that we will re-read. Much of the following
2492 code which sets things to NULL really is necessary to tell
2493 other parts of GDB that there is nothing currently there.
2495 Try to keep the freeing order compatible with free_objfile. */
2497 if (objfile
->sf
!= NULL
)
2499 (*objfile
->sf
->sym_finish
) (objfile
);
2502 clear_objfile_data (objfile
);
2504 /* Clean up any state BFD has sitting around. */
2506 gdb_bfd_ref_ptr
obfd (objfile
->obfd
);
2507 const char *obfd_filename
;
2509 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2510 /* Open the new BFD before freeing the old one, so that
2511 the filename remains live. */
2512 gdb_bfd_ref_ptr
temp (gdb_bfd_open (obfd_filename
, gnutarget
));
2513 objfile
->obfd
= temp
.release ();
2514 if (objfile
->obfd
== NULL
)
2515 error (_("Can't open %s to read symbols."), obfd_filename
);
2518 std::string original_name
= objfile
->original_name
;
2520 /* bfd_openr sets cacheable to true, which is what we want. */
2521 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2522 error (_("Can't read symbols from %s: %s."), objfile_name (objfile
),
2523 bfd_errmsg (bfd_get_error ()));
2525 /* NB: after this call to obstack_free, objfiles_changed
2526 will need to be called (see discussion below). */
2527 obstack_free (&objfile
->objfile_obstack
, 0);
2528 objfile
->sections
= NULL
;
2529 objfile
->section_offsets
.clear ();
2530 objfile
->sect_index_bss
= -1;
2531 objfile
->sect_index_data
= -1;
2532 objfile
->sect_index_rodata
= -1;
2533 objfile
->sect_index_text
= -1;
2534 objfile
->compunit_symtabs
= NULL
;
2535 objfile
->template_symbols
= NULL
;
2536 objfile
->static_links
.reset (nullptr);
2538 /* obstack_init also initializes the obstack so it is
2539 empty. We could use obstack_specify_allocation but
2540 gdb_obstack.h specifies the alloc/dealloc functions. */
2541 obstack_init (&objfile
->objfile_obstack
);
2543 /* set_objfile_per_bfd potentially allocates the per-bfd
2544 data on the objfile's obstack (if sharing data across
2545 multiple users is not possible), so it's important to
2546 do it *after* the obstack has been initialized. */
2547 set_objfile_per_bfd (objfile
);
2549 objfile
->original_name
2550 = obstack_strdup (&objfile
->objfile_obstack
, original_name
);
2552 /* Reset the sym_fns pointer. The ELF reader can change it
2553 based on whether .gdb_index is present, and we need it to
2554 start over. PR symtab/15885 */
2555 objfile_set_sym_fns (objfile
, find_sym_fns (objfile
->obfd
));
2556 objfile
->reset_psymtabs ();
2557 objfile
->qf
.clear ();
2558 objfile
->qf
.push_front
2559 (make_psymbol_functions (objfile
->partial_symtabs
));
2561 build_objfile_section_table (objfile
);
2563 /* What the hell is sym_new_init for, anyway? The concept of
2564 distinguishing between the main file and additional files
2565 in this way seems rather dubious. */
2566 if (objfile
== current_program_space
->symfile_object_file
)
2568 (*objfile
->sf
->sym_new_init
) (objfile
);
2571 (*objfile
->sf
->sym_init
) (objfile
);
2572 clear_complaints ();
2574 objfile
->flags
&= ~OBJF_PSYMTABS_READ
;
2576 /* We are about to read new symbols and potentially also
2577 DWARF information. Some targets may want to pass addresses
2578 read from DWARF DIE's through an adjustment function before
2579 saving them, like MIPS, which may call into
2580 "find_pc_section". When called, that function will make
2581 use of per-objfile program space data.
2583 Since we discarded our section information above, we have
2584 dangling pointers in the per-objfile program space data
2585 structure. Force GDB to update the section mapping
2586 information by letting it know the objfile has changed,
2587 making the dangling pointers point to correct data
2590 objfiles_changed ();
2592 /* Recompute section offsets and section indices. */
2593 objfile
->sf
->sym_offsets (objfile
, {});
2595 read_symbols (objfile
, 0);
2597 if (!objfile_has_symbols (objfile
))
2600 printf_filtered (_("(no debugging symbols found)\n"));
2604 /* We're done reading the symbol file; finish off complaints. */
2605 clear_complaints ();
2607 /* Getting new symbols may change our opinion about what is
2610 reinit_frame_cache ();
2612 /* Discard cleanups as symbol reading was successful. */
2613 objfile_holder
.release ();
2614 defer_clear_users
.release ();
2616 /* If the mtime has changed between the time we set new_modtime
2617 and now, we *want* this to be out of date, so don't call stat
2619 objfile
->mtime
= new_modtime
;
2620 init_entry_point_info (objfile
);
2622 new_objfiles
.push_back (objfile
);
2626 if (!new_objfiles
.empty ())
2628 clear_symtab_users (0);
2630 /* clear_objfile_data for each objfile was called before freeing it and
2631 gdb::observers::new_objfile.notify (NULL) has been called by
2632 clear_symtab_users above. Notify the new files now. */
2633 for (auto iter
: new_objfiles
)
2634 gdb::observers::new_objfile
.notify (iter
);
2636 /* At least one objfile has changed, so we can consider that
2637 the executable we're debugging has changed too. */
2638 gdb::observers::executable_changed
.notify ();
2643 struct filename_language
2645 filename_language (const std::string
&ext_
, enum language lang_
)
2646 : ext (ext_
), lang (lang_
)
2653 static std::vector
<filename_language
> filename_language_table
;
2655 /* See symfile.h. */
2658 add_filename_language (const char *ext
, enum language lang
)
2660 gdb_assert (ext
!= nullptr);
2661 filename_language_table
.emplace_back (ext
, lang
);
2664 static char *ext_args
;
2666 show_ext_args (struct ui_file
*file
, int from_tty
,
2667 struct cmd_list_element
*c
, const char *value
)
2669 fprintf_filtered (file
,
2670 _("Mapping between filename extension "
2671 "and source language is \"%s\".\n"),
2676 set_ext_lang_command (const char *args
,
2677 int from_tty
, struct cmd_list_element
*e
)
2679 char *cp
= ext_args
;
2682 /* First arg is filename extension, starting with '.' */
2684 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2686 /* Find end of first arg. */
2687 while (*cp
&& !isspace (*cp
))
2691 error (_("'%s': two arguments required -- "
2692 "filename extension and language"),
2695 /* Null-terminate first arg. */
2698 /* Find beginning of second arg, which should be a source language. */
2699 cp
= skip_spaces (cp
);
2702 error (_("'%s': two arguments required -- "
2703 "filename extension and language"),
2706 /* Lookup the language from among those we know. */
2707 lang
= language_enum (cp
);
2709 auto it
= filename_language_table
.begin ();
2710 /* Now lookup the filename extension: do we already know it? */
2711 for (; it
!= filename_language_table
.end (); it
++)
2713 if (it
->ext
== ext_args
)
2717 if (it
== filename_language_table
.end ())
2719 /* New file extension. */
2720 add_filename_language (ext_args
, lang
);
2724 /* Redefining a previously known filename extension. */
2727 /* query ("Really make files of type %s '%s'?", */
2728 /* ext_args, language_str (lang)); */
2735 info_ext_lang_command (const char *args
, int from_tty
)
2737 printf_filtered (_("Filename extensions and the languages they represent:"));
2738 printf_filtered ("\n\n");
2739 for (const filename_language
&entry
: filename_language_table
)
2740 printf_filtered ("\t%s\t- %s\n", entry
.ext
.c_str (),
2741 language_str (entry
.lang
));
2745 deduce_language_from_filename (const char *filename
)
2749 if (filename
!= NULL
)
2750 if ((cp
= strrchr (filename
, '.')) != NULL
)
2752 for (const filename_language
&entry
: filename_language_table
)
2753 if (entry
.ext
== cp
)
2757 return language_unknown
;
2760 /* Allocate and initialize a new symbol table.
2761 CUST is from the result of allocate_compunit_symtab. */
2764 allocate_symtab (struct compunit_symtab
*cust
, const char *filename
)
2766 struct objfile
*objfile
= cust
->objfile
;
2767 struct symtab
*symtab
2768 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symtab
);
2770 symtab
->filename
= objfile
->intern (filename
);
2771 symtab
->fullname
= NULL
;
2772 symtab
->language
= deduce_language_from_filename (filename
);
2774 /* This can be very verbose with lots of headers.
2775 Only print at higher debug levels. */
2776 if (symtab_create_debug
>= 2)
2778 /* Be a bit clever with debugging messages, and don't print objfile
2779 every time, only when it changes. */
2780 static char *last_objfile_name
= NULL
;
2782 if (last_objfile_name
== NULL
2783 || strcmp (last_objfile_name
, objfile_name (objfile
)) != 0)
2785 xfree (last_objfile_name
);
2786 last_objfile_name
= xstrdup (objfile_name (objfile
));
2787 fprintf_filtered (gdb_stdlog
,
2788 "Creating one or more symtabs for objfile %s ...\n",
2791 fprintf_filtered (gdb_stdlog
,
2792 "Created symtab %s for module %s.\n",
2793 host_address_to_string (symtab
), filename
);
2796 /* Add it to CUST's list of symtabs. */
2797 if (cust
->filetabs
== NULL
)
2799 cust
->filetabs
= symtab
;
2800 cust
->last_filetab
= symtab
;
2804 cust
->last_filetab
->next
= symtab
;
2805 cust
->last_filetab
= symtab
;
2808 /* Backlink to the containing compunit symtab. */
2809 symtab
->compunit_symtab
= cust
;
2814 /* Allocate and initialize a new compunit.
2815 NAME is the name of the main source file, if there is one, or some
2816 descriptive text if there are no source files. */
2818 struct compunit_symtab
*
2819 allocate_compunit_symtab (struct objfile
*objfile
, const char *name
)
2821 struct compunit_symtab
*cu
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
,
2822 struct compunit_symtab
);
2823 const char *saved_name
;
2825 cu
->objfile
= objfile
;
2827 /* The name we record here is only for display/debugging purposes.
2828 Just save the basename to avoid path issues (too long for display,
2829 relative vs absolute, etc.). */
2830 saved_name
= lbasename (name
);
2831 cu
->name
= obstack_strdup (&objfile
->objfile_obstack
, saved_name
);
2833 COMPUNIT_DEBUGFORMAT (cu
) = "unknown";
2835 if (symtab_create_debug
)
2837 fprintf_filtered (gdb_stdlog
,
2838 "Created compunit symtab %s for %s.\n",
2839 host_address_to_string (cu
),
2846 /* Hook CU to the objfile it comes from. */
2849 add_compunit_symtab_to_objfile (struct compunit_symtab
*cu
)
2851 cu
->next
= cu
->objfile
->compunit_symtabs
;
2852 cu
->objfile
->compunit_symtabs
= cu
;
2856 /* Reset all data structures in gdb which may contain references to
2857 symbol table data. */
2860 clear_symtab_users (symfile_add_flags add_flags
)
2862 /* Someday, we should do better than this, by only blowing away
2863 the things that really need to be blown. */
2865 /* Clear the "current" symtab first, because it is no longer valid.
2866 breakpoint_re_set may try to access the current symtab. */
2867 clear_current_source_symtab_and_line ();
2870 clear_last_displayed_sal ();
2871 clear_pc_function_cache ();
2872 gdb::observers::new_objfile
.notify (NULL
);
2874 /* Varobj may refer to old symbols, perform a cleanup. */
2875 varobj_invalidate ();
2877 /* Now that the various caches have been cleared, we can re_set
2878 our breakpoints without risking it using stale data. */
2879 if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
2880 breakpoint_re_set ();
2884 The following code implements an abstraction for debugging overlay sections.
2886 The target model is as follows:
2887 1) The gnu linker will permit multiple sections to be mapped into the
2888 same VMA, each with its own unique LMA (or load address).
2889 2) It is assumed that some runtime mechanism exists for mapping the
2890 sections, one by one, from the load address into the VMA address.
2891 3) This code provides a mechanism for gdb to keep track of which
2892 sections should be considered to be mapped from the VMA to the LMA.
2893 This information is used for symbol lookup, and memory read/write.
2894 For instance, if a section has been mapped then its contents
2895 should be read from the VMA, otherwise from the LMA.
2897 Two levels of debugger support for overlays are available. One is
2898 "manual", in which the debugger relies on the user to tell it which
2899 overlays are currently mapped. This level of support is
2900 implemented entirely in the core debugger, and the information about
2901 whether a section is mapped is kept in the objfile->obj_section table.
2903 The second level of support is "automatic", and is only available if
2904 the target-specific code provides functionality to read the target's
2905 overlay mapping table, and translate its contents for the debugger
2906 (by updating the mapped state information in the obj_section tables).
2908 The interface is as follows:
2910 overlay map <name> -- tell gdb to consider this section mapped
2911 overlay unmap <name> -- tell gdb to consider this section unmapped
2912 overlay list -- list the sections that GDB thinks are mapped
2913 overlay read-target -- get the target's state of what's mapped
2914 overlay off/manual/auto -- set overlay debugging state
2915 Functional interface:
2916 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2917 section, return that section.
2918 find_pc_overlay(pc): find any overlay section that contains
2919 the pc, either in its VMA or its LMA
2920 section_is_mapped(sect): true if overlay is marked as mapped
2921 section_is_overlay(sect): true if section's VMA != LMA
2922 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2923 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2924 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2925 overlay_mapped_address(...): map an address from section's LMA to VMA
2926 overlay_unmapped_address(...): map an address from section's VMA to LMA
2927 symbol_overlayed_address(...): Return a "current" address for symbol:
2928 either in VMA or LMA depending on whether
2929 the symbol's section is currently mapped. */
2931 /* Overlay debugging state: */
2933 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2934 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state. */
2936 /* Function: section_is_overlay (SECTION)
2937 Returns true if SECTION has VMA not equal to LMA, ie.
2938 SECTION is loaded at an address different from where it will "run". */
2941 section_is_overlay (struct obj_section
*section
)
2943 if (overlay_debugging
&& section
)
2945 asection
*bfd_section
= section
->the_bfd_section
;
2947 if (bfd_section_lma (bfd_section
) != 0
2948 && bfd_section_lma (bfd_section
) != bfd_section_vma (bfd_section
))
2955 /* Function: overlay_invalidate_all (void)
2956 Invalidate the mapped state of all overlay sections (mark it as stale). */
2959 overlay_invalidate_all (void)
2961 struct obj_section
*sect
;
2963 for (objfile
*objfile
: current_program_space
->objfiles ())
2964 ALL_OBJFILE_OSECTIONS (objfile
, sect
)
2965 if (section_is_overlay (sect
))
2966 sect
->ovly_mapped
= -1;
2969 /* Function: section_is_mapped (SECTION)
2970 Returns true if section is an overlay, and is currently mapped.
2972 Access to the ovly_mapped flag is restricted to this function, so
2973 that we can do automatic update. If the global flag
2974 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2975 overlay_invalidate_all. If the mapped state of the particular
2976 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2979 section_is_mapped (struct obj_section
*osect
)
2981 struct gdbarch
*gdbarch
;
2983 if (osect
== 0 || !section_is_overlay (osect
))
2986 switch (overlay_debugging
)
2990 return 0; /* overlay debugging off */
2991 case ovly_auto
: /* overlay debugging automatic */
2992 /* Unles there is a gdbarch_overlay_update function,
2993 there's really nothing useful to do here (can't really go auto). */
2994 gdbarch
= osect
->objfile
->arch ();
2995 if (gdbarch_overlay_update_p (gdbarch
))
2997 if (overlay_cache_invalid
)
2999 overlay_invalidate_all ();
3000 overlay_cache_invalid
= 0;
3002 if (osect
->ovly_mapped
== -1)
3003 gdbarch_overlay_update (gdbarch
, osect
);
3006 case ovly_on
: /* overlay debugging manual */
3007 return osect
->ovly_mapped
== 1;
3011 /* Function: pc_in_unmapped_range
3012 If PC falls into the lma range of SECTION, return true, else false. */
3015 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3017 if (section_is_overlay (section
))
3019 asection
*bfd_section
= section
->the_bfd_section
;
3021 /* We assume the LMA is relocated by the same offset as the VMA. */
3022 bfd_vma size
= bfd_section_size (bfd_section
);
3023 CORE_ADDR offset
= obj_section_offset (section
);
3025 if (bfd_section_lma (bfd_section
) + offset
<= pc
3026 && pc
< bfd_section_lma (bfd_section
) + offset
+ size
)
3033 /* Function: pc_in_mapped_range
3034 If PC falls into the vma range of SECTION, return true, else false. */
3037 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3039 if (section_is_overlay (section
))
3041 if (obj_section_addr (section
) <= pc
3042 && pc
< obj_section_endaddr (section
))
3049 /* Return true if the mapped ranges of sections A and B overlap, false
3053 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3055 CORE_ADDR a_start
= obj_section_addr (a
);
3056 CORE_ADDR a_end
= obj_section_endaddr (a
);
3057 CORE_ADDR b_start
= obj_section_addr (b
);
3058 CORE_ADDR b_end
= obj_section_endaddr (b
);
3060 return (a_start
< b_end
&& b_start
< a_end
);
3063 /* Function: overlay_unmapped_address (PC, SECTION)
3064 Returns the address corresponding to PC in the unmapped (load) range.
3065 May be the same as PC. */
3068 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3070 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3072 asection
*bfd_section
= section
->the_bfd_section
;
3074 return (pc
+ bfd_section_lma (bfd_section
)
3075 - bfd_section_vma (bfd_section
));
3081 /* Function: overlay_mapped_address (PC, SECTION)
3082 Returns the address corresponding to PC in the mapped (runtime) range.
3083 May be the same as PC. */
3086 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3088 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3090 asection
*bfd_section
= section
->the_bfd_section
;
3092 return (pc
+ bfd_section_vma (bfd_section
)
3093 - bfd_section_lma (bfd_section
));
3099 /* Function: symbol_overlayed_address
3100 Return one of two addresses (relative to the VMA or to the LMA),
3101 depending on whether the section is mapped or not. */
3104 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3106 if (overlay_debugging
)
3108 /* If the symbol has no section, just return its regular address. */
3111 /* If the symbol's section is not an overlay, just return its
3113 if (!section_is_overlay (section
))
3115 /* If the symbol's section is mapped, just return its address. */
3116 if (section_is_mapped (section
))
3119 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3120 * then return its LOADED address rather than its vma address!!
3122 return overlay_unmapped_address (address
, section
);
3127 /* Function: find_pc_overlay (PC)
3128 Return the best-match overlay section for PC:
3129 If PC matches a mapped overlay section's VMA, return that section.
3130 Else if PC matches an unmapped section's VMA, return that section.
3131 Else if PC matches an unmapped section's LMA, return that section. */
3133 struct obj_section
*
3134 find_pc_overlay (CORE_ADDR pc
)
3136 struct obj_section
*osect
, *best_match
= NULL
;
3138 if (overlay_debugging
)
3140 for (objfile
*objfile
: current_program_space
->objfiles ())
3141 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3142 if (section_is_overlay (osect
))
3144 if (pc_in_mapped_range (pc
, osect
))
3146 if (section_is_mapped (osect
))
3151 else if (pc_in_unmapped_range (pc
, osect
))
3158 /* Function: find_pc_mapped_section (PC)
3159 If PC falls into the VMA address range of an overlay section that is
3160 currently marked as MAPPED, return that section. Else return NULL. */
3162 struct obj_section
*
3163 find_pc_mapped_section (CORE_ADDR pc
)
3165 struct obj_section
*osect
;
3167 if (overlay_debugging
)
3169 for (objfile
*objfile
: current_program_space
->objfiles ())
3170 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3171 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3178 /* Function: list_overlays_command
3179 Print a list of mapped sections and their PC ranges. */
3182 list_overlays_command (const char *args
, int from_tty
)
3185 struct obj_section
*osect
;
3187 if (overlay_debugging
)
3189 for (objfile
*objfile
: current_program_space
->objfiles ())
3190 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3191 if (section_is_mapped (osect
))
3193 struct gdbarch
*gdbarch
= objfile
->arch ();
3198 vma
= bfd_section_vma (osect
->the_bfd_section
);
3199 lma
= bfd_section_lma (osect
->the_bfd_section
);
3200 size
= bfd_section_size (osect
->the_bfd_section
);
3201 name
= bfd_section_name (osect
->the_bfd_section
);
3203 printf_filtered ("Section %s, loaded at ", name
);
3204 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3205 puts_filtered (" - ");
3206 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3207 printf_filtered (", mapped at ");
3208 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3209 puts_filtered (" - ");
3210 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3211 puts_filtered ("\n");
3217 printf_filtered (_("No sections are mapped.\n"));
3220 /* Function: map_overlay_command
3221 Mark the named section as mapped (ie. residing at its VMA address). */
3224 map_overlay_command (const char *args
, int from_tty
)
3226 struct obj_section
*sec
, *sec2
;
3228 if (!overlay_debugging
)
3229 error (_("Overlay debugging not enabled. Use "
3230 "either the 'overlay auto' or\n"
3231 "the 'overlay manual' command."));
3233 if (args
== 0 || *args
== 0)
3234 error (_("Argument required: name of an overlay section"));
3236 /* First, find a section matching the user supplied argument. */
3237 for (objfile
*obj_file
: current_program_space
->objfiles ())
3238 ALL_OBJFILE_OSECTIONS (obj_file
, sec
)
3239 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3241 /* Now, check to see if the section is an overlay. */
3242 if (!section_is_overlay (sec
))
3243 continue; /* not an overlay section */
3245 /* Mark the overlay as "mapped". */
3246 sec
->ovly_mapped
= 1;
3248 /* Next, make a pass and unmap any sections that are
3249 overlapped by this new section: */
3250 for (objfile
*objfile2
: current_program_space
->objfiles ())
3251 ALL_OBJFILE_OSECTIONS (objfile2
, sec2
)
3252 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
,
3256 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3257 bfd_section_name (sec2
->the_bfd_section
));
3258 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2. */
3262 error (_("No overlay section called %s"), args
);
3265 /* Function: unmap_overlay_command
3266 Mark the overlay section as unmapped
3267 (ie. resident in its LMA address range, rather than the VMA range). */
3270 unmap_overlay_command (const char *args
, int from_tty
)
3272 struct obj_section
*sec
= NULL
;
3274 if (!overlay_debugging
)
3275 error (_("Overlay debugging not enabled. "
3276 "Use either the 'overlay auto' or\n"
3277 "the 'overlay manual' command."));
3279 if (args
== 0 || *args
== 0)
3280 error (_("Argument required: name of an overlay section"));
3282 /* First, find a section matching the user supplied argument. */
3283 for (objfile
*objfile
: current_program_space
->objfiles ())
3284 ALL_OBJFILE_OSECTIONS (objfile
, sec
)
3285 if (!strcmp (bfd_section_name (sec
->the_bfd_section
), args
))
3287 if (!sec
->ovly_mapped
)
3288 error (_("Section %s is not mapped"), args
);
3289 sec
->ovly_mapped
= 0;
3292 error (_("No overlay section called %s"), args
);
3295 /* Function: overlay_auto_command
3296 A utility command to turn on overlay debugging.
3297 Possibly this should be done via a set/show command. */
3300 overlay_auto_command (const char *args
, int from_tty
)
3302 overlay_debugging
= ovly_auto
;
3303 enable_overlay_breakpoints ();
3305 printf_unfiltered (_("Automatic overlay debugging enabled."));
3308 /* Function: overlay_manual_command
3309 A utility command to turn on overlay debugging.
3310 Possibly this should be done via a set/show command. */
3313 overlay_manual_command (const char *args
, int from_tty
)
3315 overlay_debugging
= ovly_on
;
3316 disable_overlay_breakpoints ();
3318 printf_unfiltered (_("Overlay debugging enabled."));
3321 /* Function: overlay_off_command
3322 A utility command to turn on overlay debugging.
3323 Possibly this should be done via a set/show command. */
3326 overlay_off_command (const char *args
, int from_tty
)
3328 overlay_debugging
= ovly_off
;
3329 disable_overlay_breakpoints ();
3331 printf_unfiltered (_("Overlay debugging disabled."));
3335 overlay_load_command (const char *args
, int from_tty
)
3337 struct gdbarch
*gdbarch
= get_current_arch ();
3339 if (gdbarch_overlay_update_p (gdbarch
))
3340 gdbarch_overlay_update (gdbarch
, NULL
);
3342 error (_("This target does not know how to read its overlay state."));
3345 /* Command list chain containing all defined "overlay" subcommands. */
3346 static struct cmd_list_element
*overlaylist
;
3348 /* Target Overlays for the "Simplest" overlay manager:
3350 This is GDB's default target overlay layer. It works with the
3351 minimal overlay manager supplied as an example by Cygnus. The
3352 entry point is via a function pointer "gdbarch_overlay_update",
3353 so targets that use a different runtime overlay manager can
3354 substitute their own overlay_update function and take over the
3357 The overlay_update function pokes around in the target's data structures
3358 to see what overlays are mapped, and updates GDB's overlay mapping with
3361 In this simple implementation, the target data structures are as follows:
3362 unsigned _novlys; /# number of overlay sections #/
3363 unsigned _ovly_table[_novlys][4] = {
3364 {VMA, OSIZE, LMA, MAPPED}, /# one entry per overlay section #/
3365 {..., ..., ..., ...},
3367 unsigned _novly_regions; /# number of overlay regions #/
3368 unsigned _ovly_region_table[_novly_regions][3] = {
3369 {VMA, OSIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3372 These functions will attempt to update GDB's mappedness state in the
3373 symbol section table, based on the target's mappedness state.
3375 To do this, we keep a cached copy of the target's _ovly_table, and
3376 attempt to detect when the cached copy is invalidated. The main
3377 entry point is "simple_overlay_update(SECT), which looks up SECT in
3378 the cached table and re-reads only the entry for that section from
3379 the target (whenever possible). */
3381 /* Cached, dynamically allocated copies of the target data structures: */
3382 static unsigned (*cache_ovly_table
)[4] = 0;
3383 static unsigned cache_novlys
= 0;
3384 static CORE_ADDR cache_ovly_table_base
= 0;
3387 VMA
, OSIZE
, LMA
, MAPPED
3390 /* Throw away the cached copy of _ovly_table. */
3393 simple_free_overlay_table (void)
3395 xfree (cache_ovly_table
);
3397 cache_ovly_table
= NULL
;
3398 cache_ovly_table_base
= 0;
3401 /* Read an array of ints of size SIZE from the target into a local buffer.
3402 Convert to host order. int LEN is number of ints. */
3405 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3406 int len
, int size
, enum bfd_endian byte_order
)
3408 /* FIXME (alloca): Not safe if array is very large. */
3409 gdb_byte
*buf
= (gdb_byte
*) alloca (len
* size
);
3412 read_memory (memaddr
, buf
, len
* size
);
3413 for (i
= 0; i
< len
; i
++)
3414 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3417 /* Find and grab a copy of the target _ovly_table
3418 (and _novlys, which is needed for the table's size). */
3421 simple_read_overlay_table (void)
3423 struct bound_minimal_symbol novlys_msym
;
3424 struct bound_minimal_symbol ovly_table_msym
;
3425 struct gdbarch
*gdbarch
;
3427 enum bfd_endian byte_order
;
3429 simple_free_overlay_table ();
3430 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3431 if (! novlys_msym
.minsym
)
3433 error (_("Error reading inferior's overlay table: "
3434 "couldn't find `_novlys' variable\n"
3435 "in inferior. Use `overlay manual' mode."));
3439 ovly_table_msym
= lookup_bound_minimal_symbol ("_ovly_table");
3440 if (! ovly_table_msym
.minsym
)
3442 error (_("Error reading inferior's overlay table: couldn't find "
3443 "`_ovly_table' array\n"
3444 "in inferior. Use `overlay manual' mode."));
3448 gdbarch
= ovly_table_msym
.objfile
->arch ();
3449 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3450 byte_order
= gdbarch_byte_order (gdbarch
);
3452 cache_novlys
= read_memory_integer (BMSYMBOL_VALUE_ADDRESS (novlys_msym
),
3455 = (unsigned int (*)[4]) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3456 cache_ovly_table_base
= BMSYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3457 read_target_long_array (cache_ovly_table_base
,
3458 (unsigned int *) cache_ovly_table
,
3459 cache_novlys
* 4, word_size
, byte_order
);
3461 return 1; /* SUCCESS */
3464 /* Function: simple_overlay_update_1
3465 A helper function for simple_overlay_update. Assuming a cached copy
3466 of _ovly_table exists, look through it to find an entry whose vma,
3467 lma and size match those of OSECT. Re-read the entry and make sure
3468 it still matches OSECT (else the table may no longer be valid).
3469 Set OSECT's mapped state to match the entry. Return: 1 for
3470 success, 0 for failure. */
3473 simple_overlay_update_1 (struct obj_section
*osect
)
3476 asection
*bsect
= osect
->the_bfd_section
;
3477 struct gdbarch
*gdbarch
= osect
->objfile
->arch ();
3478 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3479 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3481 for (i
= 0; i
< cache_novlys
; i
++)
3482 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3483 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3485 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3486 (unsigned int *) cache_ovly_table
[i
],
3487 4, word_size
, byte_order
);
3488 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3489 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3491 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3494 else /* Warning! Warning! Target's ovly table has changed! */
3500 /* Function: simple_overlay_update
3501 If OSECT is NULL, then update all sections' mapped state
3502 (after re-reading the entire target _ovly_table).
3503 If OSECT is non-NULL, then try to find a matching entry in the
3504 cached ovly_table and update only OSECT's mapped state.
3505 If a cached entry can't be found or the cache isn't valid, then
3506 re-read the entire cache, and go ahead and update all sections. */
3509 simple_overlay_update (struct obj_section
*osect
)
3511 /* Were we given an osect to look up? NULL means do all of them. */
3513 /* Have we got a cached copy of the target's overlay table? */
3514 if (cache_ovly_table
!= NULL
)
3516 /* Does its cached location match what's currently in the
3518 struct bound_minimal_symbol minsym
3519 = lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3521 if (minsym
.minsym
== NULL
)
3522 error (_("Error reading inferior's overlay table: couldn't "
3523 "find `_ovly_table' array\n"
3524 "in inferior. Use `overlay manual' mode."));
3526 if (cache_ovly_table_base
== BMSYMBOL_VALUE_ADDRESS (minsym
))
3527 /* Then go ahead and try to look up this single section in
3529 if (simple_overlay_update_1 (osect
))
3530 /* Found it! We're done. */
3534 /* Cached table no good: need to read the entire table anew.
3535 Or else we want all the sections, in which case it's actually
3536 more efficient to read the whole table in one block anyway. */
3538 if (! simple_read_overlay_table ())
3541 /* Now may as well update all sections, even if only one was requested. */
3542 for (objfile
*objfile
: current_program_space
->objfiles ())
3543 ALL_OBJFILE_OSECTIONS (objfile
, osect
)
3544 if (section_is_overlay (osect
))
3547 asection
*bsect
= osect
->the_bfd_section
;
3549 for (i
= 0; i
< cache_novlys
; i
++)
3550 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (bsect
)
3551 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (bsect
))
3552 { /* obj_section matches i'th entry in ovly_table. */
3553 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3554 break; /* finished with inner for loop: break out. */
3559 /* Default implementation for sym_relocate. */
3562 default_symfile_relocate (struct objfile
*objfile
, asection
*sectp
,
3565 /* Use sectp->owner instead of objfile->obfd. sectp may point to a
3567 bfd
*abfd
= sectp
->owner
;
3569 /* We're only interested in sections with relocation
3571 if ((sectp
->flags
& SEC_RELOC
) == 0)
3574 /* We will handle section offsets properly elsewhere, so relocate as if
3575 all sections begin at 0. */
3576 for (asection
*sect
: gdb_bfd_sections (abfd
))
3578 sect
->output_section
= sect
;
3579 sect
->output_offset
= 0;
3582 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3585 /* Relocate the contents of a debug section SECTP in ABFD. The
3586 contents are stored in BUF if it is non-NULL, or returned in a
3587 malloc'd buffer otherwise.
3589 For some platforms and debug info formats, shared libraries contain
3590 relocations against the debug sections (particularly for DWARF-2;
3591 one affected platform is PowerPC GNU/Linux, although it depends on
3592 the version of the linker in use). Also, ELF object files naturally
3593 have unresolved relocations for their debug sections. We need to apply
3594 the relocations in order to get the locations of symbols correct.
3595 Another example that may require relocation processing, is the
3596 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3600 symfile_relocate_debug_section (struct objfile
*objfile
,
3601 asection
*sectp
, bfd_byte
*buf
)
3603 gdb_assert (objfile
->sf
->sym_relocate
);
3605 return (*objfile
->sf
->sym_relocate
) (objfile
, sectp
, buf
);
3608 symfile_segment_data_up
3609 get_symfile_segment_data (bfd
*abfd
)
3611 const struct sym_fns
*sf
= find_sym_fns (abfd
);
3616 return sf
->sym_segments (abfd
);
3620 - DATA, containing segment addresses from the object file ABFD, and
3621 the mapping from ABFD's sections onto the segments that own them,
3623 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
3624 segment addresses reported by the target,
3625 store the appropriate offsets for each section in OFFSETS.
3627 If there are fewer entries in SEGMENT_BASES than there are segments
3628 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
3630 If there are more entries, then ignore the extra. The target may
3631 not be able to distinguish between an empty data segment and a
3632 missing data segment; a missing text segment is less plausible. */
3635 symfile_map_offsets_to_segments (bfd
*abfd
,
3636 const struct symfile_segment_data
*data
,
3637 section_offsets
&offsets
,
3638 int num_segment_bases
,
3639 const CORE_ADDR
*segment_bases
)
3644 /* It doesn't make sense to call this function unless you have some
3645 segment base addresses. */
3646 gdb_assert (num_segment_bases
> 0);
3648 /* If we do not have segment mappings for the object file, we
3649 can not relocate it by segments. */
3650 gdb_assert (data
!= NULL
);
3651 gdb_assert (data
->segments
.size () > 0);
3653 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3655 int which
= data
->segment_info
[i
];
3657 gdb_assert (0 <= which
&& which
<= data
->segments
.size ());
3659 /* Don't bother computing offsets for sections that aren't
3660 loaded as part of any segment. */
3664 /* Use the last SEGMENT_BASES entry as the address of any extra
3665 segments mentioned in DATA->segment_info. */
3666 if (which
> num_segment_bases
)
3667 which
= num_segment_bases
;
3669 offsets
[i
] = segment_bases
[which
- 1] - data
->segments
[which
- 1].base
;
3676 symfile_find_segment_sections (struct objfile
*objfile
)
3678 bfd
*abfd
= objfile
->obfd
;
3682 symfile_segment_data_up data
3683 = get_symfile_segment_data (objfile
->obfd
);
3687 if (data
->segments
.size () != 1 && data
->segments
.size () != 2)
3690 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
3692 int which
= data
->segment_info
[i
];
3696 if (objfile
->sect_index_text
== -1)
3697 objfile
->sect_index_text
= sect
->index
;
3699 if (objfile
->sect_index_rodata
== -1)
3700 objfile
->sect_index_rodata
= sect
->index
;
3702 else if (which
== 2)
3704 if (objfile
->sect_index_data
== -1)
3705 objfile
->sect_index_data
= sect
->index
;
3707 if (objfile
->sect_index_bss
== -1)
3708 objfile
->sect_index_bss
= sect
->index
;
3713 /* Listen for free_objfile events. */
3716 symfile_free_objfile (struct objfile
*objfile
)
3718 /* Remove the target sections owned by this objfile. */
3719 if (objfile
!= NULL
)
3720 current_program_space
->remove_target_sections ((void *) objfile
);
3723 /* Wrapper around the quick_symbol_functions expand_symtabs_matching "method".
3724 Expand all symtabs that match the specified criteria.
3725 See quick_symbol_functions.expand_symtabs_matching for details. */
3728 expand_symtabs_matching
3729 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
3730 const lookup_name_info
&lookup_name
,
3731 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
3732 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
3733 enum search_domain kind
)
3735 for (objfile
*objfile
: current_program_space
->objfiles ())
3736 objfile
->expand_symtabs_matching (file_matcher
,
3739 expansion_notify
, kind
);
3742 /* Wrapper around the quick_symbol_functions map_symbol_filenames "method".
3743 Map function FUN over every file.
3744 See quick_symbol_functions.map_symbol_filenames for details. */
3747 map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
3750 for (objfile
*objfile
: current_program_space
->objfiles ())
3751 objfile
->map_symbol_filenames (fun
, data
, need_fullname
);
3756 namespace selftests
{
3757 namespace filename_language
{
3759 static void test_filename_language ()
3761 /* This test messes up the filename_language_table global. */
3762 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3764 /* Test deducing an unknown extension. */
3765 language lang
= deduce_language_from_filename ("myfile.blah");
3766 SELF_CHECK (lang
== language_unknown
);
3768 /* Test deducing a known extension. */
3769 lang
= deduce_language_from_filename ("myfile.c");
3770 SELF_CHECK (lang
== language_c
);
3772 /* Test adding a new extension using the internal API. */
3773 add_filename_language (".blah", language_pascal
);
3774 lang
= deduce_language_from_filename ("myfile.blah");
3775 SELF_CHECK (lang
== language_pascal
);
3779 test_set_ext_lang_command ()
3781 /* This test messes up the filename_language_table global. */
3782 scoped_restore restore_flt
= make_scoped_restore (&filename_language_table
);
3784 /* Confirm that the .hello extension is not known. */
3785 language lang
= deduce_language_from_filename ("cake.hello");
3786 SELF_CHECK (lang
== language_unknown
);
3788 /* Test adding a new extension using the CLI command. */
3789 auto args_holder
= make_unique_xstrdup (".hello rust");
3790 ext_args
= args_holder
.get ();
3791 set_ext_lang_command (NULL
, 1, NULL
);
3793 lang
= deduce_language_from_filename ("cake.hello");
3794 SELF_CHECK (lang
== language_rust
);
3796 /* Test overriding an existing extension using the CLI command. */
3797 int size_before
= filename_language_table
.size ();
3798 args_holder
.reset (xstrdup (".hello pascal"));
3799 ext_args
= args_holder
.get ();
3800 set_ext_lang_command (NULL
, 1, NULL
);
3801 int size_after
= filename_language_table
.size ();
3803 lang
= deduce_language_from_filename ("cake.hello");
3804 SELF_CHECK (lang
== language_pascal
);
3805 SELF_CHECK (size_before
== size_after
);
3808 } /* namespace filename_language */
3809 } /* namespace selftests */
3811 #endif /* GDB_SELF_TEST */
3813 void _initialize_symfile ();
3815 _initialize_symfile ()
3817 struct cmd_list_element
*c
;
3819 gdb::observers::free_objfile
.attach (symfile_free_objfile
);
3821 #define READNOW_READNEVER_HELP \
3822 "The '-readnow' option will cause GDB to read the entire symbol file\n\
3823 immediately. This makes the command slower, but may make future operations\n\
3825 The '-readnever' option will prevent GDB from reading the symbol file's\n\
3826 symbolic debug information."
3828 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3829 Load symbol table from executable file FILE.\n\
3830 Usage: symbol-file [-readnow | -readnever] [-o OFF] FILE\n\
3831 OFF is an optional offset which is added to each section address.\n\
3832 The `file' command can also load symbol tables, as well as setting the file\n\
3833 to execute.\n" READNOW_READNEVER_HELP
), &cmdlist
);
3834 set_cmd_completer (c
, filename_completer
);
3836 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3837 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3838 Usage: add-symbol-file FILE [-readnow | -readnever] [-o OFF] [ADDR] \
3839 [-s SECT-NAME SECT-ADDR]...\n\
3840 ADDR is the starting address of the file's text.\n\
3841 Each '-s' argument provides a section name and address, and\n\
3842 should be specified if the data and bss segments are not contiguous\n\
3843 with the text. SECT-NAME is a section name to be loaded at SECT-ADDR.\n\
3844 OFF is an optional offset which is added to the default load addresses\n\
3845 of all sections for which no other address was specified.\n"
3846 READNOW_READNEVER_HELP
),
3848 set_cmd_completer (c
, filename_completer
);
3850 c
= add_cmd ("remove-symbol-file", class_files
,
3851 remove_symbol_file_command
, _("\
3852 Remove a symbol file added via the add-symbol-file command.\n\
3853 Usage: remove-symbol-file FILENAME\n\
3854 remove-symbol-file -a ADDRESS\n\
3855 The file to remove can be identified by its filename or by an address\n\
3856 that lies within the boundaries of this symbol file in memory."),
3859 c
= add_cmd ("load", class_files
, load_command
, _("\
3860 Dynamically load FILE into the running program.\n\
3861 FILE symbols are recorded for access from GDB.\n\
3862 Usage: load [FILE] [OFFSET]\n\
3863 An optional load OFFSET may also be given as a literal address.\n\
3864 When OFFSET is provided, FILE must also be provided. FILE can be provided\n\
3865 on its own."), &cmdlist
);
3866 set_cmd_completer (c
, filename_completer
);
3868 add_basic_prefix_cmd ("overlay", class_support
,
3869 _("Commands for debugging overlays."), &overlaylist
,
3870 "overlay ", 0, &cmdlist
);
3872 add_com_alias ("ovly", "overlay", class_support
, 1);
3873 add_com_alias ("ov", "overlay", class_support
, 1);
3875 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3876 _("Assert that an overlay section is mapped."), &overlaylist
);
3878 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3879 _("Assert that an overlay section is unmapped."), &overlaylist
);
3881 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3882 _("List mappings of overlay sections."), &overlaylist
);
3884 add_cmd ("manual", class_support
, overlay_manual_command
,
3885 _("Enable overlay debugging."), &overlaylist
);
3886 add_cmd ("off", class_support
, overlay_off_command
,
3887 _("Disable overlay debugging."), &overlaylist
);
3888 add_cmd ("auto", class_support
, overlay_auto_command
,
3889 _("Enable automatic overlay debugging."), &overlaylist
);
3890 add_cmd ("load-target", class_support
, overlay_load_command
,
3891 _("Read the overlay mapping state from the target."), &overlaylist
);
3893 /* Filename extension to source language lookup table: */
3894 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3896 Set mapping between filename extension and source language."), _("\
3897 Show mapping between filename extension and source language."), _("\
3898 Usage: set extension-language .foo bar"),
3899 set_ext_lang_command
,
3901 &setlist
, &showlist
);
3903 add_info ("extensions", info_ext_lang_command
,
3904 _("All filename extensions associated with a source language."));
3906 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3907 &debug_file_directory
, _("\
3908 Set the directories where separate debug symbols are searched for."), _("\
3909 Show the directories where separate debug symbols are searched for."), _("\
3910 Separate debug symbols are first searched for in the same\n\
3911 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3912 and lastly at the path of the directory of the binary with\n\
3913 each global debug-file-directory component prepended."),
3915 show_debug_file_directory
,
3916 &setlist
, &showlist
);
3918 add_setshow_enum_cmd ("symbol-loading", no_class
,
3919 print_symbol_loading_enums
, &print_symbol_loading
,
3921 Set printing of symbol loading messages."), _("\
3922 Show printing of symbol loading messages."), _("\
3923 off == turn all messages off\n\
3924 brief == print messages for the executable,\n\
3925 and brief messages for shared libraries\n\
3926 full == print messages for the executable,\n\
3927 and messages for each shared library."),
3930 &setprintlist
, &showprintlist
);
3932 add_setshow_boolean_cmd ("separate-debug-file", no_class
,
3933 &separate_debug_file_debug
, _("\
3934 Set printing of separate debug info file search debug."), _("\
3935 Show printing of separate debug info file search debug."), _("\
3936 When on, GDB prints the searched locations while looking for separate debug \
3937 info files."), NULL
, NULL
, &setdebuglist
, &showdebuglist
);
3940 selftests::register_test
3941 ("filename_language", selftests::filename_language::test_filename_language
);
3942 selftests::register_test
3943 ("set_ext_lang_command",
3944 selftests::filename_language::test_set_ext_lang_command
);