1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "arch-utils.h"
37 #include "breakpoint.h"
39 #include "complaints.h"
43 #include "filenames.h" /* for DOSish file names */
44 #include "gdb-stabs.h"
45 #include "gdb_obstack.h"
46 #include "completer.h"
49 #include "readline/readline.h"
50 #include "gdb_assert.h"
54 #include "parser-defs.h"
60 #include <sys/types.h>
62 #include "gdb_string.h"
69 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
70 void (*deprecated_show_load_progress
) (const char *section
,
71 unsigned long section_sent
,
72 unsigned long section_size
,
73 unsigned long total_sent
,
74 unsigned long total_size
);
75 void (*deprecated_pre_add_symbol_hook
) (const char *);
76 void (*deprecated_post_add_symbol_hook
) (void);
78 static void clear_symtab_users_cleanup (void *ignore
);
80 /* Global variables owned by this file */
81 int readnow_symbol_files
; /* Read full symbols immediately */
83 /* External variables and functions referenced. */
85 extern void report_transfer_performance (unsigned long, time_t, time_t);
87 /* Functions this file defines */
90 static int simple_read_overlay_region_table (void);
91 static void simple_free_overlay_region_table (void);
94 static void load_command (char *, int);
96 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
98 static void add_symbol_file_command (char *, int);
100 static void reread_separate_symbols (struct objfile
*objfile
);
102 static void cashier_psymtab (struct partial_symtab
*);
104 bfd
*symfile_bfd_open (char *);
106 int get_section_index (struct objfile
*, char *);
108 static struct sym_fns
*find_sym_fns (bfd
*);
110 static void decrement_reading_symtab (void *);
112 static void overlay_invalidate_all (void);
114 void list_overlays_command (char *, int);
116 void map_overlay_command (char *, int);
118 void unmap_overlay_command (char *, int);
120 static void overlay_auto_command (char *, int);
122 static void overlay_manual_command (char *, int);
124 static void overlay_off_command (char *, int);
126 static void overlay_load_command (char *, int);
128 static void overlay_command (char *, int);
130 static void simple_free_overlay_table (void);
132 static void read_target_long_array (CORE_ADDR
, unsigned int *, int, int,
135 static int simple_read_overlay_table (void);
137 static int simple_overlay_update_1 (struct obj_section
*);
139 static void add_filename_language (char *ext
, enum language lang
);
141 static void info_ext_lang_command (char *args
, int from_tty
);
143 static char *find_separate_debug_file (struct objfile
*objfile
);
145 static void init_filename_language_table (void);
147 static void symfile_find_segment_sections (struct objfile
*objfile
);
149 void _initialize_symfile (void);
151 /* List of all available sym_fns. On gdb startup, each object file reader
152 calls add_symtab_fns() to register information on each format it is
155 static struct sym_fns
*symtab_fns
= NULL
;
157 /* Flag for whether user will be reloading symbols multiple times.
158 Defaults to ON for VxWorks, otherwise OFF. */
160 #ifdef SYMBOL_RELOADING_DEFAULT
161 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
163 int symbol_reloading
= 0;
166 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
167 struct cmd_list_element
*c
, const char *value
)
169 fprintf_filtered (file
, _("\
170 Dynamic symbol table reloading multiple times in one run is %s.\n"),
174 /* If non-zero, gdb will notify the user when it is loading symbols
175 from a file. This is almost always what users will want to have happen;
176 but for programs with lots of dynamically linked libraries, the output
177 can be more noise than signal. */
179 int print_symbol_loading
= 1;
181 /* If non-zero, shared library symbols will be added automatically
182 when the inferior is created, new libraries are loaded, or when
183 attaching to the inferior. This is almost always what users will
184 want to have happen; but for very large programs, the startup time
185 will be excessive, and so if this is a problem, the user can clear
186 this flag and then add the shared library symbols as needed. Note
187 that there is a potential for confusion, since if the shared
188 library symbols are not loaded, commands like "info fun" will *not*
189 report all the functions that are actually present. */
191 int auto_solib_add
= 1;
193 /* For systems that support it, a threshold size in megabytes. If
194 automatically adding a new library's symbol table to those already
195 known to the debugger would cause the total shared library symbol
196 size to exceed this threshhold, then the shlib's symbols are not
197 added. The threshold is ignored if the user explicitly asks for a
198 shlib to be added, such as when using the "sharedlibrary"
201 int auto_solib_limit
;
204 /* This compares two partial symbols by names, using strcmp_iw_ordered
205 for the comparison. */
208 compare_psymbols (const void *s1p
, const void *s2p
)
210 struct partial_symbol
*const *s1
= s1p
;
211 struct partial_symbol
*const *s2
= s2p
;
213 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
214 SYMBOL_SEARCH_NAME (*s2
));
218 sort_pst_symbols (struct partial_symtab
*pst
)
220 /* Sort the global list; don't sort the static list */
222 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
223 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
227 /* Make a null terminated copy of the string at PTR with SIZE characters in
228 the obstack pointed to by OBSTACKP . Returns the address of the copy.
229 Note that the string at PTR does not have to be null terminated, I.E. it
230 may be part of a larger string and we are only saving a substring. */
233 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
235 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
236 /* Open-coded memcpy--saves function call time. These strings are usually
237 short. FIXME: Is this really still true with a compiler that can
240 const char *p1
= ptr
;
242 const char *end
= ptr
+ size
;
250 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
251 in the obstack pointed to by OBSTACKP. */
254 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
257 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
258 char *val
= (char *) obstack_alloc (obstackp
, len
);
265 /* True if we are nested inside psymtab_to_symtab. */
267 int currently_reading_symtab
= 0;
270 decrement_reading_symtab (void *dummy
)
272 currently_reading_symtab
--;
275 /* Get the symbol table that corresponds to a partial_symtab.
276 This is fast after the first time you do it. In fact, there
277 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
281 psymtab_to_symtab (struct partial_symtab
*pst
)
283 /* If it's been looked up before, return it. */
287 /* If it has not yet been read in, read it. */
290 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
291 currently_reading_symtab
++;
292 (*pst
->read_symtab
) (pst
);
293 do_cleanups (back_to
);
299 /* Remember the lowest-addressed loadable section we've seen.
300 This function is called via bfd_map_over_sections.
302 In case of equal vmas, the section with the largest size becomes the
303 lowest-addressed loadable section.
305 If the vmas and sizes are equal, the last section is considered the
306 lowest-addressed loadable section. */
309 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
311 asection
**lowest
= (asection
**) obj
;
313 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
316 *lowest
= sect
; /* First loadable section */
317 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
318 *lowest
= sect
; /* A lower loadable section */
319 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
320 && (bfd_section_size (abfd
, (*lowest
))
321 <= bfd_section_size (abfd
, sect
)))
325 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
327 struct section_addr_info
*
328 alloc_section_addr_info (size_t num_sections
)
330 struct section_addr_info
*sap
;
333 size
= (sizeof (struct section_addr_info
)
334 + sizeof (struct other_sections
) * (num_sections
- 1));
335 sap
= (struct section_addr_info
*) xmalloc (size
);
336 memset (sap
, 0, size
);
337 sap
->num_sections
= num_sections
;
343 /* Return a freshly allocated copy of ADDRS. The section names, if
344 any, are also freshly allocated copies of those in ADDRS. */
345 struct section_addr_info
*
346 copy_section_addr_info (struct section_addr_info
*addrs
)
348 struct section_addr_info
*copy
349 = alloc_section_addr_info (addrs
->num_sections
);
352 copy
->num_sections
= addrs
->num_sections
;
353 for (i
= 0; i
< addrs
->num_sections
; i
++)
355 copy
->other
[i
].addr
= addrs
->other
[i
].addr
;
356 if (addrs
->other
[i
].name
)
357 copy
->other
[i
].name
= xstrdup (addrs
->other
[i
].name
);
359 copy
->other
[i
].name
= NULL
;
360 copy
->other
[i
].sectindex
= addrs
->other
[i
].sectindex
;
368 /* Build (allocate and populate) a section_addr_info struct from
369 an existing section table. */
371 extern struct section_addr_info
*
372 build_section_addr_info_from_section_table (const struct target_section
*start
,
373 const struct target_section
*end
)
375 struct section_addr_info
*sap
;
376 const struct target_section
*stp
;
379 sap
= alloc_section_addr_info (end
- start
);
381 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
383 if (bfd_get_section_flags (stp
->bfd
,
384 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
385 && oidx
< end
- start
)
387 sap
->other
[oidx
].addr
= stp
->addr
;
388 sap
->other
[oidx
].name
389 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
390 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
399 /* Free all memory allocated by build_section_addr_info_from_section_table. */
402 free_section_addr_info (struct section_addr_info
*sap
)
406 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
407 if (sap
->other
[idx
].name
)
408 xfree (sap
->other
[idx
].name
);
413 /* Initialize OBJFILE's sect_index_* members. */
415 init_objfile_sect_indices (struct objfile
*objfile
)
420 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
422 objfile
->sect_index_text
= sect
->index
;
424 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
426 objfile
->sect_index_data
= sect
->index
;
428 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
430 objfile
->sect_index_bss
= sect
->index
;
432 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
434 objfile
->sect_index_rodata
= sect
->index
;
436 /* This is where things get really weird... We MUST have valid
437 indices for the various sect_index_* members or gdb will abort.
438 So if for example, there is no ".text" section, we have to
439 accomodate that. First, check for a file with the standard
440 one or two segments. */
442 symfile_find_segment_sections (objfile
);
444 /* Except when explicitly adding symbol files at some address,
445 section_offsets contains nothing but zeros, so it doesn't matter
446 which slot in section_offsets the individual sect_index_* members
447 index into. So if they are all zero, it is safe to just point
448 all the currently uninitialized indices to the first slot. But
449 beware: if this is the main executable, it may be relocated
450 later, e.g. by the remote qOffsets packet, and then this will
451 be wrong! That's why we try segments first. */
453 for (i
= 0; i
< objfile
->num_sections
; i
++)
455 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
460 if (i
== objfile
->num_sections
)
462 if (objfile
->sect_index_text
== -1)
463 objfile
->sect_index_text
= 0;
464 if (objfile
->sect_index_data
== -1)
465 objfile
->sect_index_data
= 0;
466 if (objfile
->sect_index_bss
== -1)
467 objfile
->sect_index_bss
= 0;
468 if (objfile
->sect_index_rodata
== -1)
469 objfile
->sect_index_rodata
= 0;
473 /* The arguments to place_section. */
475 struct place_section_arg
477 struct section_offsets
*offsets
;
481 /* Find a unique offset to use for loadable section SECT if
482 the user did not provide an offset. */
485 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
487 struct place_section_arg
*arg
= obj
;
488 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
490 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
492 /* We are only interested in allocated sections. */
493 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
496 /* If the user specified an offset, honor it. */
497 if (offsets
[sect
->index
] != 0)
500 /* Otherwise, let's try to find a place for the section. */
501 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
508 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
510 int indx
= cur_sec
->index
;
511 CORE_ADDR cur_offset
;
513 /* We don't need to compare against ourself. */
517 /* We can only conflict with allocated sections. */
518 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
521 /* If the section offset is 0, either the section has not been placed
522 yet, or it was the lowest section placed (in which case LOWEST
523 will be past its end). */
524 if (offsets
[indx
] == 0)
527 /* If this section would overlap us, then we must move up. */
528 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
529 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
531 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
532 start_addr
= (start_addr
+ align
- 1) & -align
;
537 /* Otherwise, we appear to be OK. So far. */
542 offsets
[sect
->index
] = start_addr
;
543 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
546 /* Parse the user's idea of an offset for dynamic linking, into our idea
547 of how to represent it for fast symbol reading. This is the default
548 version of the sym_fns.sym_offsets function for symbol readers that
549 don't need to do anything special. It allocates a section_offsets table
550 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
553 default_symfile_offsets (struct objfile
*objfile
,
554 struct section_addr_info
*addrs
)
558 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
559 objfile
->section_offsets
= (struct section_offsets
*)
560 obstack_alloc (&objfile
->objfile_obstack
,
561 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
562 memset (objfile
->section_offsets
, 0,
563 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
565 /* Now calculate offsets for section that were specified by the
567 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
569 struct other_sections
*osp
;
571 osp
= &addrs
->other
[i
] ;
575 /* Record all sections in offsets */
576 /* The section_offsets in the objfile are here filled in using
578 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
581 /* For relocatable files, all loadable sections will start at zero.
582 The zero is meaningless, so try to pick arbitrary addresses such
583 that no loadable sections overlap. This algorithm is quadratic,
584 but the number of sections in a single object file is generally
586 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
588 struct place_section_arg arg
;
589 bfd
*abfd
= objfile
->obfd
;
591 CORE_ADDR lowest
= 0;
593 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
594 /* We do not expect this to happen; just skip this step if the
595 relocatable file has a section with an assigned VMA. */
596 if (bfd_section_vma (abfd
, cur_sec
) != 0)
601 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
603 /* Pick non-overlapping offsets for sections the user did not
605 arg
.offsets
= objfile
->section_offsets
;
607 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
609 /* Correctly filling in the section offsets is not quite
610 enough. Relocatable files have two properties that
611 (most) shared objects do not:
613 - Their debug information will contain relocations. Some
614 shared libraries do also, but many do not, so this can not
617 - If there are multiple code sections they will be loaded
618 at different relative addresses in memory than they are
619 in the objfile, since all sections in the file will start
622 Because GDB has very limited ability to map from an
623 address in debug info to the correct code section,
624 it relies on adding SECT_OFF_TEXT to things which might be
625 code. If we clear all the section offsets, and set the
626 section VMAs instead, then symfile_relocate_debug_section
627 will return meaningful debug information pointing at the
630 GDB has too many different data structures for section
631 addresses - a bfd, objfile, and so_list all have section
632 tables, as does exec_ops. Some of these could probably
635 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
636 cur_sec
= cur_sec
->next
)
638 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
641 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
642 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
643 offsets
[cur_sec
->index
]);
644 offsets
[cur_sec
->index
] = 0;
649 /* Remember the bfd indexes for the .text, .data, .bss and
651 init_objfile_sect_indices (objfile
);
655 /* Divide the file into segments, which are individual relocatable units.
656 This is the default version of the sym_fns.sym_segments function for
657 symbol readers that do not have an explicit representation of segments.
658 It assumes that object files do not have segments, and fully linked
659 files have a single segment. */
661 struct symfile_segment_data
*
662 default_symfile_segments (bfd
*abfd
)
666 struct symfile_segment_data
*data
;
669 /* Relocatable files contain enough information to position each
670 loadable section independently; they should not be relocated
672 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
675 /* Make sure there is at least one loadable section in the file. */
676 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
678 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
686 low
= bfd_get_section_vma (abfd
, sect
);
687 high
= low
+ bfd_get_section_size (sect
);
689 data
= XZALLOC (struct symfile_segment_data
);
690 data
->num_segments
= 1;
691 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
692 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
694 num_sections
= bfd_count_sections (abfd
);
695 data
->segment_info
= XCALLOC (num_sections
, int);
697 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
701 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
704 vma
= bfd_get_section_vma (abfd
, sect
);
707 if (vma
+ bfd_get_section_size (sect
) > high
)
708 high
= vma
+ bfd_get_section_size (sect
);
710 data
->segment_info
[i
] = 1;
713 data
->segment_bases
[0] = low
;
714 data
->segment_sizes
[0] = high
- low
;
719 /* Process a symbol file, as either the main file or as a dynamically
722 OBJFILE is where the symbols are to be read from.
724 ADDRS is the list of section load addresses. If the user has given
725 an 'add-symbol-file' command, then this is the list of offsets and
726 addresses he or she provided as arguments to the command; or, if
727 we're handling a shared library, these are the actual addresses the
728 sections are loaded at, according to the inferior's dynamic linker
729 (as gleaned by GDB's shared library code). We convert each address
730 into an offset from the section VMA's as it appears in the object
731 file, and then call the file's sym_offsets function to convert this
732 into a format-specific offset table --- a `struct section_offsets'.
733 If ADDRS is non-zero, OFFSETS must be zero.
735 OFFSETS is a table of section offsets already in the right
736 format-specific representation. NUM_OFFSETS is the number of
737 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
738 assume this is the proper table the call to sym_offsets described
739 above would produce. Instead of calling sym_offsets, we just dump
740 it right into objfile->section_offsets. (When we're re-reading
741 symbols from an objfile, we don't have the original load address
742 list any more; all we have is the section offset table.) If
743 OFFSETS is non-zero, ADDRS must be zero.
745 ADD_FLAGS encodes verbosity level, whether this is main symbol or
746 an extra symbol file such as dynamically loaded code, and wether
747 breakpoint reset should be deferred. */
750 syms_from_objfile (struct objfile
*objfile
,
751 struct section_addr_info
*addrs
,
752 struct section_offsets
*offsets
,
756 struct section_addr_info
*local_addr
= NULL
;
757 struct cleanup
*old_chain
;
758 const int mainline
= add_flags
& SYMFILE_MAINLINE
;
760 gdb_assert (! (addrs
&& offsets
));
762 init_entry_point_info (objfile
);
763 objfile
->sf
= find_sym_fns (objfile
->obfd
);
765 if (objfile
->sf
== NULL
)
766 return; /* No symbols. */
768 /* Make sure that partially constructed symbol tables will be cleaned up
769 if an error occurs during symbol reading. */
770 old_chain
= make_cleanup_free_objfile (objfile
);
772 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
773 list. We now establish the convention that an addr of zero means
774 no load address was specified. */
775 if (! addrs
&& ! offsets
)
778 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
779 make_cleanup (xfree
, local_addr
);
783 /* Now either addrs or offsets is non-zero. */
787 /* We will modify the main symbol table, make sure that all its users
788 will be cleaned up if an error occurs during symbol reading. */
789 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
791 /* Since no error yet, throw away the old symbol table. */
793 if (symfile_objfile
!= NULL
)
795 free_objfile (symfile_objfile
);
796 symfile_objfile
= NULL
;
799 /* Currently we keep symbols from the add-symbol-file command.
800 If the user wants to get rid of them, they should do "symbol-file"
801 without arguments first. Not sure this is the best behavior
804 (*objfile
->sf
->sym_new_init
) (objfile
);
807 /* Convert addr into an offset rather than an absolute address.
808 We find the lowest address of a loaded segment in the objfile,
809 and assume that <addr> is where that got loaded.
811 We no longer warn if the lowest section is not a text segment (as
812 happens for the PA64 port. */
813 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
815 asection
*lower_sect
;
817 CORE_ADDR lower_offset
;
820 /* Find lowest loadable section to be used as starting point for
821 continguous sections. FIXME!! won't work without call to find
822 .text first, but this assumes text is lowest section. */
823 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
824 if (lower_sect
== NULL
)
825 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
827 if (lower_sect
== NULL
)
829 warning (_("no loadable sections found in added symbol-file %s"),
834 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
836 /* Calculate offsets for the loadable sections.
837 FIXME! Sections must be in order of increasing loadable section
838 so that contiguous sections can use the lower-offset!!!
840 Adjust offsets if the segments are not contiguous.
841 If the section is contiguous, its offset should be set to
842 the offset of the highest loadable section lower than it
843 (the loadable section directly below it in memory).
844 this_offset = lower_offset = lower_addr - lower_orig_addr */
846 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
848 if (addrs
->other
[i
].addr
!= 0)
850 sect
= bfd_get_section_by_name (objfile
->obfd
,
851 addrs
->other
[i
].name
);
855 -= bfd_section_vma (objfile
->obfd
, sect
);
856 lower_offset
= addrs
->other
[i
].addr
;
857 /* This is the index used by BFD. */
858 addrs
->other
[i
].sectindex
= sect
->index
;
862 warning (_("section %s not found in %s"),
863 addrs
->other
[i
].name
,
865 addrs
->other
[i
].addr
= 0;
869 addrs
->other
[i
].addr
= lower_offset
;
873 /* Initialize symbol reading routines for this objfile, allow complaints to
874 appear for this new file, and record how verbose to be, then do the
875 initial symbol reading for this file. */
877 (*objfile
->sf
->sym_init
) (objfile
);
878 clear_complaints (&symfile_complaints
, 1, add_flags
& SYMFILE_VERBOSE
);
881 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
884 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
886 /* Just copy in the offset table directly as given to us. */
887 objfile
->num_sections
= num_offsets
;
888 objfile
->section_offsets
889 = ((struct section_offsets
*)
890 obstack_alloc (&objfile
->objfile_obstack
, size
));
891 memcpy (objfile
->section_offsets
, offsets
, size
);
893 init_objfile_sect_indices (objfile
);
896 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
898 /* Discard cleanups as symbol reading was successful. */
900 discard_cleanups (old_chain
);
904 /* Perform required actions after either reading in the initial
905 symbols for a new objfile, or mapping in the symbols from a reusable
909 new_symfile_objfile (struct objfile
*objfile
, int add_flags
)
912 /* If this is the main symbol file we have to clean up all users of the
913 old main symbol file. Otherwise it is sufficient to fixup all the
914 breakpoints that may have been redefined by this symbol file. */
915 if (add_flags
& SYMFILE_MAINLINE
)
917 /* OK, make it the "real" symbol file. */
918 symfile_objfile
= objfile
;
920 clear_symtab_users ();
922 else if ((add_flags
& SYMFILE_DEFER_BP_RESET
) == 0)
924 breakpoint_re_set ();
927 /* We're done reading the symbol file; finish off complaints. */
928 clear_complaints (&symfile_complaints
, 0, add_flags
& SYMFILE_VERBOSE
);
931 /* Process a symbol file, as either the main file or as a dynamically
934 ABFD is a BFD already open on the file, as from symfile_bfd_open.
935 This BFD will be closed on error, and is always consumed by this function.
937 ADD_FLAGS encodes verbosity, whether this is main symbol file or
938 extra, such as dynamically loaded code, and what to do with breakpoins.
940 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
941 syms_from_objfile, above.
942 ADDRS is ignored when SYMFILE_MAINLINE bit is set in ADD_FLAGS.
944 Upon success, returns a pointer to the objfile that was added.
945 Upon failure, jumps back to command level (never returns). */
947 static struct objfile
*
948 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
,
950 struct section_addr_info
*addrs
,
951 struct section_offsets
*offsets
,
955 struct objfile
*objfile
;
956 struct partial_symtab
*psymtab
;
957 char *debugfile
= NULL
;
958 struct section_addr_info
*orig_addrs
= NULL
;
959 struct cleanup
*my_cleanups
;
960 const char *name
= bfd_get_filename (abfd
);
961 const int from_tty
= add_flags
& SYMFILE_VERBOSE
;
963 my_cleanups
= make_cleanup_bfd_close (abfd
);
965 /* Give user a chance to burp if we'd be
966 interactively wiping out any existing symbols. */
968 if ((have_full_symbols () || have_partial_symbols ())
969 && (add_flags
& SYMFILE_MAINLINE
)
971 && !query (_("Load new symbol table from \"%s\"? "), name
))
972 error (_("Not confirmed."));
974 objfile
= allocate_objfile (abfd
, flags
);
975 discard_cleanups (my_cleanups
);
979 orig_addrs
= copy_section_addr_info (addrs
);
980 make_cleanup_free_section_addr_info (orig_addrs
);
983 /* We either created a new mapped symbol table, mapped an existing
984 symbol table file which has not had initial symbol reading
985 performed, or need to read an unmapped symbol table. */
986 if (from_tty
|| info_verbose
)
988 if (deprecated_pre_add_symbol_hook
)
989 deprecated_pre_add_symbol_hook (name
);
992 if (print_symbol_loading
)
994 printf_unfiltered (_("Reading symbols from %s..."), name
);
996 gdb_flush (gdb_stdout
);
1000 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1003 /* We now have at least a partial symbol table. Check to see if the
1004 user requested that all symbols be read on initial access via either
1005 the gdb startup command line or on a per symbol file basis. Expand
1006 all partial symbol tables for this objfile if so. */
1008 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
1010 if ((from_tty
|| info_verbose
) && print_symbol_loading
)
1012 printf_unfiltered (_("expanding to full symbols..."));
1014 gdb_flush (gdb_stdout
);
1017 for (psymtab
= objfile
->psymtabs
;
1019 psymtab
= psymtab
->next
)
1021 psymtab_to_symtab (psymtab
);
1025 /* If the file has its own symbol tables it has no separate debug info.
1026 `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS.
1027 `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */
1028 if (objfile
->psymtabs
== NULL
)
1029 debugfile
= find_separate_debug_file (objfile
);
1034 objfile
->separate_debug_objfile
1035 = symbol_file_add (debugfile
, add_flags
, orig_addrs
, flags
);
1039 objfile
->separate_debug_objfile
1040 = symbol_file_add (debugfile
, add_flags
, NULL
, flags
);
1042 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
1045 /* Put the separate debug object before the normal one, this is so that
1046 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
1047 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
1052 if (!have_partial_symbols () && !have_full_symbols ()
1053 && print_symbol_loading
)
1056 printf_unfiltered (_("(no debugging symbols found)"));
1057 if (from_tty
|| info_verbose
)
1058 printf_unfiltered ("...");
1060 printf_unfiltered ("\n");
1064 if (from_tty
|| info_verbose
)
1066 if (deprecated_post_add_symbol_hook
)
1067 deprecated_post_add_symbol_hook ();
1070 if (print_symbol_loading
)
1071 printf_unfiltered (_("done.\n"));
1075 /* We print some messages regardless of whether 'from_tty ||
1076 info_verbose' is true, so make sure they go out at the right
1078 gdb_flush (gdb_stdout
);
1080 do_cleanups (my_cleanups
);
1082 if (objfile
->sf
== NULL
)
1084 observer_notify_new_objfile (objfile
);
1085 return objfile
; /* No symbols. */
1088 new_symfile_objfile (objfile
, add_flags
);
1090 observer_notify_new_objfile (objfile
);
1092 bfd_cache_close_all ();
1097 /* Process the symbol file ABFD, as either the main file or as a
1098 dynamically loaded file.
1100 See symbol_file_add_with_addrs_or_offsets's comments for
1103 symbol_file_add_from_bfd (bfd
*abfd
, int add_flags
,
1104 struct section_addr_info
*addrs
,
1107 return symbol_file_add_with_addrs_or_offsets (abfd
, add_flags
, addrs
, 0, 0,
1112 /* Process a symbol file, as either the main file or as a dynamically
1113 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1116 symbol_file_add (char *name
, int add_flags
, struct section_addr_info
*addrs
,
1119 return symbol_file_add_from_bfd (symfile_bfd_open (name
), add_flags
, addrs
,
1124 /* Call symbol_file_add() with default values and update whatever is
1125 affected by the loading of a new main().
1126 Used when the file is supplied in the gdb command line
1127 and by some targets with special loading requirements.
1128 The auxiliary function, symbol_file_add_main_1(), has the flags
1129 argument for the switches that can only be specified in the symbol_file
1133 symbol_file_add_main (char *args
, int from_tty
)
1135 symbol_file_add_main_1 (args
, from_tty
, 0);
1139 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1141 const int add_flags
= SYMFILE_MAINLINE
| (from_tty
? SYMFILE_VERBOSE
: 0);
1142 symbol_file_add (args
, add_flags
, NULL
, flags
);
1144 /* Getting new symbols may change our opinion about
1145 what is frameless. */
1146 reinit_frame_cache ();
1148 set_initial_language ();
1152 symbol_file_clear (int from_tty
)
1154 if ((have_full_symbols () || have_partial_symbols ())
1157 ? !query (_("Discard symbol table from `%s'? "),
1158 symfile_objfile
->name
)
1159 : !query (_("Discard symbol table? "))))
1160 error (_("Not confirmed."));
1162 free_all_objfiles ();
1164 /* solib descriptors may have handles to objfiles. Since their
1165 storage has just been released, we'd better wipe the solib
1166 descriptors as well. */
1167 no_shared_libraries (NULL
, from_tty
);
1169 symfile_objfile
= NULL
;
1171 printf_unfiltered (_("No symbol file now.\n"));
1180 /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */
1182 static struct build_id
*
1183 build_id_bfd_get (bfd
*abfd
)
1185 struct build_id
*retval
;
1187 if (!bfd_check_format (abfd
, bfd_object
)
1188 || bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1189 || elf_tdata (abfd
)->build_id
== NULL
)
1192 retval
= xmalloc (sizeof *retval
- 1 + elf_tdata (abfd
)->build_id_size
);
1193 retval
->size
= elf_tdata (abfd
)->build_id_size
;
1194 memcpy (retval
->data
, elf_tdata (abfd
)->build_id
, retval
->size
);
1199 /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */
1202 build_id_verify (const char *filename
, struct build_id
*check
)
1205 struct build_id
*found
= NULL
;
1208 /* We expect to be silent on the non-existing files. */
1209 if (remote_filename_p (filename
))
1210 abfd
= remote_bfd_open (filename
, gnutarget
);
1212 abfd
= bfd_openr (filename
, gnutarget
);
1216 found
= build_id_bfd_get (abfd
);
1219 warning (_("File \"%s\" has no build-id, file skipped"), filename
);
1220 else if (found
->size
!= check
->size
1221 || memcmp (found
->data
, check
->data
, found
->size
) != 0)
1222 warning (_("File \"%s\" has a different build-id, file skipped"), filename
);
1226 if (!bfd_close (abfd
))
1227 warning (_("cannot close \"%s\": %s"), filename
,
1228 bfd_errmsg (bfd_get_error ()));
1236 build_id_to_debug_filename (struct build_id
*build_id
)
1238 char *link
, *s
, *retval
= NULL
;
1239 gdb_byte
*data
= build_id
->data
;
1240 size_t size
= build_id
->size
;
1242 /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
1243 link
= xmalloc (strlen (debug_file_directory
) + (sizeof "/.build-id/" - 1) + 1
1244 + 2 * size
+ (sizeof ".debug" - 1) + 1);
1245 s
= link
+ sprintf (link
, "%s/.build-id/", debug_file_directory
);
1249 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1254 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1255 strcpy (s
, ".debug");
1257 /* lrealpath() is expensive even for the usually non-existent files. */
1258 if (access (link
, F_OK
) == 0)
1259 retval
= lrealpath (link
);
1262 if (retval
!= NULL
&& !build_id_verify (retval
, build_id
))
1272 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1275 bfd_size_type debuglink_size
;
1276 unsigned long crc32
;
1281 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1286 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1288 contents
= xmalloc (debuglink_size
);
1289 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1290 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1292 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1293 crc_offset
= strlen (contents
) + 1;
1294 crc_offset
= (crc_offset
+ 3) & ~3;
1296 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1303 separate_debug_file_exists (const char *name
, unsigned long crc
)
1305 unsigned long file_crc
= 0;
1307 gdb_byte buffer
[8*1024];
1310 if (remote_filename_p (name
))
1311 abfd
= remote_bfd_open (name
, gnutarget
);
1313 abfd
= bfd_openr (name
, gnutarget
);
1318 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1319 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1323 return crc
== file_crc
;
1326 char *debug_file_directory
= NULL
;
1328 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1329 struct cmd_list_element
*c
, const char *value
)
1331 fprintf_filtered (file
, _("\
1332 The directory where separate debug symbols are searched for is \"%s\".\n"),
1336 #if ! defined (DEBUG_SUBDIRECTORY)
1337 #define DEBUG_SUBDIRECTORY ".debug"
1341 find_separate_debug_file (struct objfile
*objfile
)
1349 bfd_size_type debuglink_size
;
1350 unsigned long crc32
;
1352 struct build_id
*build_id
;
1354 build_id
= build_id_bfd_get (objfile
->obfd
);
1355 if (build_id
!= NULL
)
1357 char *build_id_name
;
1359 build_id_name
= build_id_to_debug_filename (build_id
);
1361 /* Prevent looping on a stripped .debug file. */
1362 if (build_id_name
!= NULL
&& strcmp (build_id_name
, objfile
->name
) == 0)
1364 warning (_("\"%s\": separate debug info file has no debug info"),
1366 xfree (build_id_name
);
1368 else if (build_id_name
!= NULL
)
1369 return build_id_name
;
1372 basename
= get_debug_link_info (objfile
, &crc32
);
1374 if (basename
== NULL
)
1377 dir
= xstrdup (objfile
->name
);
1379 /* Strip off the final filename part, leaving the directory name,
1380 followed by a slash. Objfile names should always be absolute and
1381 tilde-expanded, so there should always be a slash in there
1383 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1385 if (IS_DIR_SEPARATOR (dir
[i
]))
1388 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1391 /* Set I to max (strlen (canon_name), strlen (dir)). */
1392 canon_name
= lrealpath (dir
);
1394 if (canon_name
&& strlen (canon_name
) > i
)
1395 i
= strlen (canon_name
);
1397 debugfile
= alloca (strlen (debug_file_directory
) + 1
1399 + strlen (DEBUG_SUBDIRECTORY
)
1404 /* First try in the same directory as the original file. */
1405 strcpy (debugfile
, dir
);
1406 strcat (debugfile
, basename
);
1408 if (separate_debug_file_exists (debugfile
, crc32
))
1413 return xstrdup (debugfile
);
1416 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1417 strcpy (debugfile
, dir
);
1418 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1419 strcat (debugfile
, "/");
1420 strcat (debugfile
, basename
);
1422 if (separate_debug_file_exists (debugfile
, crc32
))
1427 return xstrdup (debugfile
);
1430 /* Then try in the global debugfile directory. */
1431 strcpy (debugfile
, debug_file_directory
);
1432 strcat (debugfile
, "/");
1433 strcat (debugfile
, dir
);
1434 strcat (debugfile
, basename
);
1436 if (separate_debug_file_exists (debugfile
, crc32
))
1441 return xstrdup (debugfile
);
1444 /* If the file is in the sysroot, try using its base path in the
1445 global debugfile directory. */
1447 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1448 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1450 strcpy (debugfile
, debug_file_directory
);
1451 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1452 strcat (debugfile
, "/");
1453 strcat (debugfile
, basename
);
1455 if (separate_debug_file_exists (debugfile
, crc32
))
1460 return xstrdup (debugfile
);
1473 /* This is the symbol-file command. Read the file, analyze its
1474 symbols, and add a struct symtab to a symtab list. The syntax of
1475 the command is rather bizarre:
1477 1. The function buildargv implements various quoting conventions
1478 which are undocumented and have little or nothing in common with
1479 the way things are quoted (or not quoted) elsewhere in GDB.
1481 2. Options are used, which are not generally used in GDB (perhaps
1482 "set mapped on", "set readnow on" would be better)
1484 3. The order of options matters, which is contrary to GNU
1485 conventions (because it is confusing and inconvenient). */
1488 symbol_file_command (char *args
, int from_tty
)
1494 symbol_file_clear (from_tty
);
1498 char **argv
= gdb_buildargv (args
);
1499 int flags
= OBJF_USERLOADED
;
1500 struct cleanup
*cleanups
;
1503 cleanups
= make_cleanup_freeargv (argv
);
1504 while (*argv
!= NULL
)
1506 if (strcmp (*argv
, "-readnow") == 0)
1507 flags
|= OBJF_READNOW
;
1508 else if (**argv
== '-')
1509 error (_("unknown option `%s'"), *argv
);
1512 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1520 error (_("no symbol file name was specified"));
1522 do_cleanups (cleanups
);
1526 /* Set the initial language.
1528 FIXME: A better solution would be to record the language in the
1529 psymtab when reading partial symbols, and then use it (if known) to
1530 set the language. This would be a win for formats that encode the
1531 language in an easily discoverable place, such as DWARF. For
1532 stabs, we can jump through hoops looking for specially named
1533 symbols or try to intuit the language from the specific type of
1534 stabs we find, but we can't do that until later when we read in
1538 set_initial_language (void)
1540 struct partial_symtab
*pst
;
1541 enum language lang
= language_unknown
;
1543 pst
= find_main_psymtab ();
1546 if (pst
->filename
!= NULL
)
1547 lang
= deduce_language_from_filename (pst
->filename
);
1549 if (lang
== language_unknown
)
1551 /* Make C the default language */
1555 set_language (lang
);
1556 expected_language
= current_language
; /* Don't warn the user. */
1560 /* Open the file specified by NAME and hand it off to BFD for
1561 preliminary analysis. Return a newly initialized bfd *, which
1562 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1563 absolute). In case of trouble, error() is called. */
1566 symfile_bfd_open (char *name
)
1570 char *absolute_name
;
1572 if (remote_filename_p (name
))
1574 name
= xstrdup (name
);
1575 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1578 make_cleanup (xfree
, name
);
1579 error (_("`%s': can't open to read symbols: %s."), name
,
1580 bfd_errmsg (bfd_get_error ()));
1583 if (!bfd_check_format (sym_bfd
, bfd_object
))
1585 bfd_close (sym_bfd
);
1586 make_cleanup (xfree
, name
);
1587 error (_("`%s': can't read symbols: %s."), name
,
1588 bfd_errmsg (bfd_get_error ()));
1594 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1596 /* Look down path for it, allocate 2nd new malloc'd copy. */
1597 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1598 O_RDONLY
| O_BINARY
, &absolute_name
);
1599 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1602 char *exename
= alloca (strlen (name
) + 5);
1603 strcat (strcpy (exename
, name
), ".exe");
1604 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1605 O_RDONLY
| O_BINARY
, &absolute_name
);
1610 make_cleanup (xfree
, name
);
1611 perror_with_name (name
);
1614 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1615 bfd. It'll be freed in free_objfile(). */
1617 name
= absolute_name
;
1619 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1623 make_cleanup (xfree
, name
);
1624 error (_("`%s': can't open to read symbols: %s."), name
,
1625 bfd_errmsg (bfd_get_error ()));
1627 bfd_set_cacheable (sym_bfd
, 1);
1629 if (!bfd_check_format (sym_bfd
, bfd_object
))
1631 /* FIXME: should be checking for errors from bfd_close (for one
1632 thing, on error it does not free all the storage associated
1634 bfd_close (sym_bfd
); /* This also closes desc. */
1635 make_cleanup (xfree
, name
);
1636 error (_("`%s': can't read symbols: %s."), name
,
1637 bfd_errmsg (bfd_get_error ()));
1640 /* bfd_usrdata exists for applications and libbfd must not touch it. */
1641 gdb_assert (bfd_usrdata (sym_bfd
) == NULL
);
1646 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1647 the section was not found. */
1650 get_section_index (struct objfile
*objfile
, char *section_name
)
1652 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1660 /* Link SF into the global symtab_fns list. Called on startup by the
1661 _initialize routine in each object file format reader, to register
1662 information about each format the the reader is prepared to
1666 add_symtab_fns (struct sym_fns
*sf
)
1668 sf
->next
= symtab_fns
;
1672 /* Initialize OBJFILE to read symbols from its associated BFD. It
1673 either returns or calls error(). The result is an initialized
1674 struct sym_fns in the objfile structure, that contains cached
1675 information about the symbol file. */
1677 static struct sym_fns
*
1678 find_sym_fns (bfd
*abfd
)
1681 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1683 if (our_flavour
== bfd_target_srec_flavour
1684 || our_flavour
== bfd_target_ihex_flavour
1685 || our_flavour
== bfd_target_tekhex_flavour
)
1686 return NULL
; /* No symbols. */
1688 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1689 if (our_flavour
== sf
->sym_flavour
)
1692 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1693 bfd_get_target (abfd
));
1697 /* This function runs the load command of our current target. */
1700 load_command (char *arg
, int from_tty
)
1702 /* The user might be reloading because the binary has changed. Take
1703 this opportunity to check. */
1704 reopen_exec_file ();
1712 parg
= arg
= get_exec_file (1);
1714 /* Count how many \ " ' tab space there are in the name. */
1715 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1723 /* We need to quote this string so buildargv can pull it apart. */
1724 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1728 make_cleanup (xfree
, temp
);
1731 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1733 strncpy (ptemp
, prev
, parg
- prev
);
1734 ptemp
+= parg
- prev
;
1738 strcpy (ptemp
, prev
);
1744 target_load (arg
, from_tty
);
1746 /* After re-loading the executable, we don't really know which
1747 overlays are mapped any more. */
1748 overlay_cache_invalid
= 1;
1751 /* This version of "load" should be usable for any target. Currently
1752 it is just used for remote targets, not inftarg.c or core files,
1753 on the theory that only in that case is it useful.
1755 Avoiding xmodem and the like seems like a win (a) because we don't have
1756 to worry about finding it, and (b) On VMS, fork() is very slow and so
1757 we don't want to run a subprocess. On the other hand, I'm not sure how
1758 performance compares. */
1760 static int validate_download
= 0;
1762 /* Callback service function for generic_load (bfd_map_over_sections). */
1765 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1767 bfd_size_type
*sum
= data
;
1769 *sum
+= bfd_get_section_size (asec
);
1772 /* Opaque data for load_section_callback. */
1773 struct load_section_data
{
1774 unsigned long load_offset
;
1775 struct load_progress_data
*progress_data
;
1776 VEC(memory_write_request_s
) *requests
;
1779 /* Opaque data for load_progress. */
1780 struct load_progress_data
{
1781 /* Cumulative data. */
1782 unsigned long write_count
;
1783 unsigned long data_count
;
1784 bfd_size_type total_size
;
1787 /* Opaque data for load_progress for a single section. */
1788 struct load_progress_section_data
{
1789 struct load_progress_data
*cumulative
;
1791 /* Per-section data. */
1792 const char *section_name
;
1793 ULONGEST section_sent
;
1794 ULONGEST section_size
;
1799 /* Target write callback routine for progress reporting. */
1802 load_progress (ULONGEST bytes
, void *untyped_arg
)
1804 struct load_progress_section_data
*args
= untyped_arg
;
1805 struct load_progress_data
*totals
;
1808 /* Writing padding data. No easy way to get at the cumulative
1809 stats, so just ignore this. */
1812 totals
= args
->cumulative
;
1814 if (bytes
== 0 && args
->section_sent
== 0)
1816 /* The write is just starting. Let the user know we've started
1818 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1819 args
->section_name
, hex_string (args
->section_size
),
1820 paddress (target_gdbarch
, args
->lma
));
1824 if (validate_download
)
1826 /* Broken memories and broken monitors manifest themselves here
1827 when bring new computers to life. This doubles already slow
1829 /* NOTE: cagney/1999-10-18: A more efficient implementation
1830 might add a verify_memory() method to the target vector and
1831 then use that. remote.c could implement that method using
1832 the ``qCRC'' packet. */
1833 gdb_byte
*check
= xmalloc (bytes
);
1834 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1836 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1837 error (_("Download verify read failed at %s"),
1838 paddress (target_gdbarch
, args
->lma
));
1839 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1840 error (_("Download verify compare failed at %s"),
1841 paddress (target_gdbarch
, args
->lma
));
1842 do_cleanups (verify_cleanups
);
1844 totals
->data_count
+= bytes
;
1846 args
->buffer
+= bytes
;
1847 totals
->write_count
+= 1;
1848 args
->section_sent
+= bytes
;
1850 || (deprecated_ui_load_progress_hook
!= NULL
1851 && deprecated_ui_load_progress_hook (args
->section_name
,
1852 args
->section_sent
)))
1853 error (_("Canceled the download"));
1855 if (deprecated_show_load_progress
!= NULL
)
1856 deprecated_show_load_progress (args
->section_name
,
1860 totals
->total_size
);
1863 /* Callback service function for generic_load (bfd_map_over_sections). */
1866 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1868 struct memory_write_request
*new_request
;
1869 struct load_section_data
*args
= data
;
1870 struct load_progress_section_data
*section_data
;
1871 bfd_size_type size
= bfd_get_section_size (asec
);
1873 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1875 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1881 new_request
= VEC_safe_push (memory_write_request_s
,
1882 args
->requests
, NULL
);
1883 memset (new_request
, 0, sizeof (struct memory_write_request
));
1884 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1885 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1886 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1887 new_request
->data
= xmalloc (size
);
1888 new_request
->baton
= section_data
;
1890 buffer
= new_request
->data
;
1892 section_data
->cumulative
= args
->progress_data
;
1893 section_data
->section_name
= sect_name
;
1894 section_data
->section_size
= size
;
1895 section_data
->lma
= new_request
->begin
;
1896 section_data
->buffer
= buffer
;
1898 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1901 /* Clean up an entire memory request vector, including load
1902 data and progress records. */
1905 clear_memory_write_data (void *arg
)
1907 VEC(memory_write_request_s
) **vec_p
= arg
;
1908 VEC(memory_write_request_s
) *vec
= *vec_p
;
1910 struct memory_write_request
*mr
;
1912 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1917 VEC_free (memory_write_request_s
, vec
);
1921 generic_load (char *args
, int from_tty
)
1924 struct timeval start_time
, end_time
;
1926 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1927 struct load_section_data cbdata
;
1928 struct load_progress_data total_progress
;
1933 memset (&cbdata
, 0, sizeof (cbdata
));
1934 memset (&total_progress
, 0, sizeof (total_progress
));
1935 cbdata
.progress_data
= &total_progress
;
1937 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1940 error_no_arg (_("file to load"));
1942 argv
= gdb_buildargv (args
);
1943 make_cleanup_freeargv (argv
);
1945 filename
= tilde_expand (argv
[0]);
1946 make_cleanup (xfree
, filename
);
1948 if (argv
[1] != NULL
)
1952 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1954 /* If the last word was not a valid number then
1955 treat it as a file name with spaces in. */
1956 if (argv
[1] == endptr
)
1957 error (_("Invalid download offset:%s."), argv
[1]);
1959 if (argv
[2] != NULL
)
1960 error (_("Too many parameters."));
1963 /* Open the file for loading. */
1964 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1965 if (loadfile_bfd
== NULL
)
1967 perror_with_name (filename
);
1971 /* FIXME: should be checking for errors from bfd_close (for one thing,
1972 on error it does not free all the storage associated with the
1974 make_cleanup_bfd_close (loadfile_bfd
);
1976 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1978 error (_("\"%s\" is not an object file: %s"), filename
,
1979 bfd_errmsg (bfd_get_error ()));
1982 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1983 (void *) &total_progress
.total_size
);
1985 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1987 gettimeofday (&start_time
, NULL
);
1989 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1990 load_progress
) != 0)
1991 error (_("Load failed"));
1993 gettimeofday (&end_time
, NULL
);
1995 entry
= bfd_get_start_address (loadfile_bfd
);
1996 ui_out_text (uiout
, "Start address ");
1997 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
1998 ui_out_text (uiout
, ", load size ");
1999 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2000 ui_out_text (uiout
, "\n");
2001 /* We were doing this in remote-mips.c, I suspect it is right
2002 for other targets too. */
2003 regcache_write_pc (get_current_regcache (), entry
);
2005 /* FIXME: are we supposed to call symbol_file_add or not? According
2006 to a comment from remote-mips.c (where a call to symbol_file_add
2007 was commented out), making the call confuses GDB if more than one
2008 file is loaded in. Some targets do (e.g., remote-vx.c) but
2009 others don't (or didn't - perhaps they have all been deleted). */
2011 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2012 total_progress
.write_count
,
2013 &start_time
, &end_time
);
2015 do_cleanups (old_cleanups
);
2018 /* Report how fast the transfer went. */
2020 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2021 replaced by print_transfer_performance (with a very different
2022 function signature). */
2025 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2028 struct timeval start
, end
;
2030 start
.tv_sec
= start_time
;
2032 end
.tv_sec
= end_time
;
2035 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2039 print_transfer_performance (struct ui_file
*stream
,
2040 unsigned long data_count
,
2041 unsigned long write_count
,
2042 const struct timeval
*start_time
,
2043 const struct timeval
*end_time
)
2045 ULONGEST time_count
;
2047 /* Compute the elapsed time in milliseconds, as a tradeoff between
2048 accuracy and overflow. */
2049 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2050 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2052 ui_out_text (uiout
, "Transfer rate: ");
2055 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2057 if (ui_out_is_mi_like_p (uiout
))
2059 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2060 ui_out_text (uiout
, " bits/sec");
2062 else if (rate
< 1024)
2064 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2065 ui_out_text (uiout
, " bytes/sec");
2069 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2070 ui_out_text (uiout
, " KB/sec");
2075 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2076 ui_out_text (uiout
, " bits in <1 sec");
2078 if (write_count
> 0)
2080 ui_out_text (uiout
, ", ");
2081 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2082 ui_out_text (uiout
, " bytes/write");
2084 ui_out_text (uiout
, ".\n");
2087 /* This function allows the addition of incrementally linked object files.
2088 It does not modify any state in the target, only in the debugger. */
2089 /* Note: ezannoni 2000-04-13 This function/command used to have a
2090 special case syntax for the rombug target (Rombug is the boot
2091 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2092 rombug case, the user doesn't need to supply a text address,
2093 instead a call to target_link() (in target.c) would supply the
2094 value to use. We are now discontinuing this type of ad hoc syntax. */
2097 add_symbol_file_command (char *args
, int from_tty
)
2099 struct gdbarch
*gdbarch
= get_current_arch ();
2100 char *filename
= NULL
;
2101 int flags
= OBJF_USERLOADED
;
2103 int expecting_option
= 0;
2104 int section_index
= 0;
2108 int expecting_sec_name
= 0;
2109 int expecting_sec_addr
= 0;
2118 struct section_addr_info
*section_addrs
;
2119 struct sect_opt
*sect_opts
= NULL
;
2120 size_t num_sect_opts
= 0;
2121 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2124 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2125 * sizeof (struct sect_opt
));
2130 error (_("add-symbol-file takes a file name and an address"));
2132 argv
= gdb_buildargv (args
);
2133 make_cleanup_freeargv (argv
);
2135 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2137 /* Process the argument. */
2140 /* The first argument is the file name. */
2141 filename
= tilde_expand (arg
);
2142 make_cleanup (xfree
, filename
);
2147 /* The second argument is always the text address at which
2148 to load the program. */
2149 sect_opts
[section_index
].name
= ".text";
2150 sect_opts
[section_index
].value
= arg
;
2151 if (++section_index
>= num_sect_opts
)
2154 sect_opts
= ((struct sect_opt
*)
2155 xrealloc (sect_opts
,
2157 * sizeof (struct sect_opt
)));
2162 /* It's an option (starting with '-') or it's an argument
2167 if (strcmp (arg
, "-readnow") == 0)
2168 flags
|= OBJF_READNOW
;
2169 else if (strcmp (arg
, "-s") == 0)
2171 expecting_sec_name
= 1;
2172 expecting_sec_addr
= 1;
2177 if (expecting_sec_name
)
2179 sect_opts
[section_index
].name
= arg
;
2180 expecting_sec_name
= 0;
2183 if (expecting_sec_addr
)
2185 sect_opts
[section_index
].value
= arg
;
2186 expecting_sec_addr
= 0;
2187 if (++section_index
>= num_sect_opts
)
2190 sect_opts
= ((struct sect_opt
*)
2191 xrealloc (sect_opts
,
2193 * sizeof (struct sect_opt
)));
2197 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2202 /* This command takes at least two arguments. The first one is a
2203 filename, and the second is the address where this file has been
2204 loaded. Abort now if this address hasn't been provided by the
2206 if (section_index
< 1)
2207 error (_("The address where %s has been loaded is missing"), filename
);
2209 /* Print the prompt for the query below. And save the arguments into
2210 a sect_addr_info structure to be passed around to other
2211 functions. We have to split this up into separate print
2212 statements because hex_string returns a local static
2215 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2216 section_addrs
= alloc_section_addr_info (section_index
);
2217 make_cleanup (xfree
, section_addrs
);
2218 for (i
= 0; i
< section_index
; i
++)
2221 char *val
= sect_opts
[i
].value
;
2222 char *sec
= sect_opts
[i
].name
;
2224 addr
= parse_and_eval_address (val
);
2226 /* Here we store the section offsets in the order they were
2227 entered on the command line. */
2228 section_addrs
->other
[sec_num
].name
= sec
;
2229 section_addrs
->other
[sec_num
].addr
= addr
;
2230 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2231 paddress (gdbarch
, addr
));
2234 /* The object's sections are initialized when a
2235 call is made to build_objfile_section_table (objfile).
2236 This happens in reread_symbols.
2237 At this point, we don't know what file type this is,
2238 so we can't determine what section names are valid. */
2241 if (from_tty
&& (!query ("%s", "")))
2242 error (_("Not confirmed."));
2244 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2245 section_addrs
, flags
);
2247 /* Getting new symbols may change our opinion about what is
2249 reinit_frame_cache ();
2250 do_cleanups (my_cleanups
);
2254 /* Re-read symbols if a symbol-file has changed. */
2256 reread_symbols (void)
2258 struct objfile
*objfile
;
2261 struct stat new_statbuf
;
2264 /* With the addition of shared libraries, this should be modified,
2265 the load time should be saved in the partial symbol tables, since
2266 different tables may come from different source files. FIXME.
2267 This routine should then walk down each partial symbol table
2268 and see if the symbol table that it originates from has been changed */
2270 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2274 #ifdef DEPRECATED_IBM6000_TARGET
2275 /* If this object is from a shared library, then you should
2276 stat on the library name, not member name. */
2278 if (objfile
->obfd
->my_archive
)
2279 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2282 res
= stat (objfile
->name
, &new_statbuf
);
2285 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2286 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2290 new_modtime
= new_statbuf
.st_mtime
;
2291 if (new_modtime
!= objfile
->mtime
)
2293 struct cleanup
*old_cleanups
;
2294 struct section_offsets
*offsets
;
2296 char *obfd_filename
;
2298 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2301 /* There are various functions like symbol_file_add,
2302 symfile_bfd_open, syms_from_objfile, etc., which might
2303 appear to do what we want. But they have various other
2304 effects which we *don't* want. So we just do stuff
2305 ourselves. We don't worry about mapped files (for one thing,
2306 any mapped file will be out of date). */
2308 /* If we get an error, blow away this objfile (not sure if
2309 that is the correct response for things like shared
2311 old_cleanups
= make_cleanup_free_objfile (objfile
);
2312 /* We need to do this whenever any symbols go away. */
2313 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2315 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2316 bfd_get_filename (exec_bfd
)) == 0)
2318 /* Reload EXEC_BFD without asking anything. */
2320 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2323 /* Clean up any state BFD has sitting around. We don't need
2324 to close the descriptor but BFD lacks a way of closing the
2325 BFD without closing the descriptor. */
2326 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2327 if (!bfd_close (objfile
->obfd
))
2328 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2329 bfd_errmsg (bfd_get_error ()));
2330 if (remote_filename_p (obfd_filename
))
2331 objfile
->obfd
= remote_bfd_open (obfd_filename
, gnutarget
);
2333 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2334 if (objfile
->obfd
== NULL
)
2335 error (_("Can't open %s to read symbols."), objfile
->name
);
2337 objfile
->obfd
= gdb_bfd_ref (objfile
->obfd
);
2338 /* bfd_openr sets cacheable to true, which is what we want. */
2339 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2340 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2341 bfd_errmsg (bfd_get_error ()));
2343 /* Save the offsets, we will nuke them with the rest of the
2345 num_offsets
= objfile
->num_sections
;
2346 offsets
= ((struct section_offsets
*)
2347 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2348 memcpy (offsets
, objfile
->section_offsets
,
2349 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2351 /* Remove any references to this objfile in the global
2353 preserve_values (objfile
);
2355 /* Nuke all the state that we will re-read. Much of the following
2356 code which sets things to NULL really is necessary to tell
2357 other parts of GDB that there is nothing currently there.
2359 Try to keep the freeing order compatible with free_objfile. */
2361 if (objfile
->sf
!= NULL
)
2363 (*objfile
->sf
->sym_finish
) (objfile
);
2366 clear_objfile_data (objfile
);
2368 /* FIXME: Do we have to free a whole linked list, or is this
2370 if (objfile
->global_psymbols
.list
)
2371 xfree (objfile
->global_psymbols
.list
);
2372 memset (&objfile
->global_psymbols
, 0,
2373 sizeof (objfile
->global_psymbols
));
2374 if (objfile
->static_psymbols
.list
)
2375 xfree (objfile
->static_psymbols
.list
);
2376 memset (&objfile
->static_psymbols
, 0,
2377 sizeof (objfile
->static_psymbols
));
2379 /* Free the obstacks for non-reusable objfiles */
2380 bcache_xfree (objfile
->psymbol_cache
);
2381 objfile
->psymbol_cache
= bcache_xmalloc ();
2382 bcache_xfree (objfile
->macro_cache
);
2383 objfile
->macro_cache
= bcache_xmalloc ();
2384 if (objfile
->demangled_names_hash
!= NULL
)
2386 htab_delete (objfile
->demangled_names_hash
);
2387 objfile
->demangled_names_hash
= NULL
;
2389 obstack_free (&objfile
->objfile_obstack
, 0);
2390 objfile
->sections
= NULL
;
2391 objfile
->symtabs
= NULL
;
2392 objfile
->psymtabs
= NULL
;
2393 objfile
->psymtabs_addrmap
= NULL
;
2394 objfile
->free_psymtabs
= NULL
;
2395 objfile
->cp_namespace_symtab
= NULL
;
2396 objfile
->msymbols
= NULL
;
2397 objfile
->deprecated_sym_private
= NULL
;
2398 objfile
->minimal_symbol_count
= 0;
2399 memset (&objfile
->msymbol_hash
, 0,
2400 sizeof (objfile
->msymbol_hash
));
2401 memset (&objfile
->msymbol_demangled_hash
, 0,
2402 sizeof (objfile
->msymbol_demangled_hash
));
2404 objfile
->psymbol_cache
= bcache_xmalloc ();
2405 objfile
->macro_cache
= bcache_xmalloc ();
2406 /* obstack_init also initializes the obstack so it is
2407 empty. We could use obstack_specify_allocation but
2408 gdb_obstack.h specifies the alloc/dealloc
2410 obstack_init (&objfile
->objfile_obstack
);
2411 if (build_objfile_section_table (objfile
))
2413 error (_("Can't find the file sections in `%s': %s"),
2414 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2416 terminate_minimal_symbol_table (objfile
);
2418 /* We use the same section offsets as from last time. I'm not
2419 sure whether that is always correct for shared libraries. */
2420 objfile
->section_offsets
= (struct section_offsets
*)
2421 obstack_alloc (&objfile
->objfile_obstack
,
2422 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2423 memcpy (objfile
->section_offsets
, offsets
,
2424 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2425 objfile
->num_sections
= num_offsets
;
2427 /* What the hell is sym_new_init for, anyway? The concept of
2428 distinguishing between the main file and additional files
2429 in this way seems rather dubious. */
2430 if (objfile
== symfile_objfile
)
2432 (*objfile
->sf
->sym_new_init
) (objfile
);
2435 (*objfile
->sf
->sym_init
) (objfile
);
2436 clear_complaints (&symfile_complaints
, 1, 1);
2437 /* The "mainline" parameter is a hideous hack; I think leaving it
2438 zero is OK since dbxread.c also does what it needs to do if
2439 objfile->global_psymbols.size is 0. */
2440 (*objfile
->sf
->sym_read
) (objfile
, 0);
2441 if (!have_partial_symbols () && !have_full_symbols ())
2444 printf_unfiltered (_("(no debugging symbols found)\n"));
2448 /* We're done reading the symbol file; finish off complaints. */
2449 clear_complaints (&symfile_complaints
, 0, 1);
2451 /* Getting new symbols may change our opinion about what is
2454 reinit_frame_cache ();
2456 /* Discard cleanups as symbol reading was successful. */
2457 discard_cleanups (old_cleanups
);
2459 /* If the mtime has changed between the time we set new_modtime
2460 and now, we *want* this to be out of date, so don't call stat
2462 objfile
->mtime
= new_modtime
;
2464 reread_separate_symbols (objfile
);
2465 init_entry_point_info (objfile
);
2472 /* Notify objfiles that we've modified objfile sections. */
2473 objfiles_changed ();
2475 clear_symtab_users ();
2476 /* At least one objfile has changed, so we can consider that
2477 the executable we're debugging has changed too. */
2478 observer_notify_executable_changed ();
2483 /* Handle separate debug info for OBJFILE, which has just been
2485 - If we had separate debug info before, but now we don't, get rid
2486 of the separated objfile.
2487 - If we didn't have separated debug info before, but now we do,
2488 read in the new separated debug info file.
2489 - If the debug link points to a different file, toss the old one
2490 and read the new one.
2491 This function does *not* handle the case where objfile is still
2492 using the same separate debug info file, but that file's timestamp
2493 has changed. That case should be handled by the loop in
2494 reread_symbols already. */
2496 reread_separate_symbols (struct objfile
*objfile
)
2499 unsigned long crc32
;
2501 /* Does the updated objfile's debug info live in a
2503 debug_file
= find_separate_debug_file (objfile
);
2505 if (objfile
->separate_debug_objfile
)
2507 /* There are two cases where we need to get rid of
2508 the old separated debug info objfile:
2509 - if the new primary objfile doesn't have
2510 separated debug info, or
2511 - if the new primary objfile has separate debug
2512 info, but it's under a different filename.
2514 If the old and new objfiles both have separate
2515 debug info, under the same filename, then we're
2516 okay --- if the separated file's contents have
2517 changed, we will have caught that when we
2518 visited it in this function's outermost
2521 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2522 free_objfile (objfile
->separate_debug_objfile
);
2525 /* If the new objfile has separate debug info, and we
2526 haven't loaded it already, do so now. */
2528 && ! objfile
->separate_debug_objfile
)
2530 /* Use the same section offset table as objfile itself.
2531 Preserve the flags from objfile that make sense. */
2532 objfile
->separate_debug_objfile
2533 = (symbol_file_add_with_addrs_or_offsets
2534 (symfile_bfd_open (debug_file
),
2535 info_verbose
? SYMFILE_VERBOSE
: 0,
2536 0, /* No addr table. */
2537 objfile
->section_offsets
, objfile
->num_sections
,
2538 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2539 | OBJF_USERLOADED
)));
2540 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2558 static filename_language
*filename_language_table
;
2559 static int fl_table_size
, fl_table_next
;
2562 add_filename_language (char *ext
, enum language lang
)
2564 if (fl_table_next
>= fl_table_size
)
2566 fl_table_size
+= 10;
2567 filename_language_table
=
2568 xrealloc (filename_language_table
,
2569 fl_table_size
* sizeof (*filename_language_table
));
2572 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2573 filename_language_table
[fl_table_next
].lang
= lang
;
2577 static char *ext_args
;
2579 show_ext_args (struct ui_file
*file
, int from_tty
,
2580 struct cmd_list_element
*c
, const char *value
)
2582 fprintf_filtered (file
, _("\
2583 Mapping between filename extension and source language is \"%s\".\n"),
2588 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2591 char *cp
= ext_args
;
2594 /* First arg is filename extension, starting with '.' */
2596 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2598 /* Find end of first arg. */
2599 while (*cp
&& !isspace (*cp
))
2603 error (_("'%s': two arguments required -- filename extension and language"),
2606 /* Null-terminate first arg */
2609 /* Find beginning of second arg, which should be a source language. */
2610 while (*cp
&& isspace (*cp
))
2614 error (_("'%s': two arguments required -- filename extension and language"),
2617 /* Lookup the language from among those we know. */
2618 lang
= language_enum (cp
);
2620 /* Now lookup the filename extension: do we already know it? */
2621 for (i
= 0; i
< fl_table_next
; i
++)
2622 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2625 if (i
>= fl_table_next
)
2627 /* new file extension */
2628 add_filename_language (ext_args
, lang
);
2632 /* redefining a previously known filename extension */
2635 /* query ("Really make files of type %s '%s'?", */
2636 /* ext_args, language_str (lang)); */
2638 xfree (filename_language_table
[i
].ext
);
2639 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2640 filename_language_table
[i
].lang
= lang
;
2645 info_ext_lang_command (char *args
, int from_tty
)
2649 printf_filtered (_("Filename extensions and the languages they represent:"));
2650 printf_filtered ("\n\n");
2651 for (i
= 0; i
< fl_table_next
; i
++)
2652 printf_filtered ("\t%s\t- %s\n",
2653 filename_language_table
[i
].ext
,
2654 language_str (filename_language_table
[i
].lang
));
2658 init_filename_language_table (void)
2660 if (fl_table_size
== 0) /* protect against repetition */
2664 filename_language_table
=
2665 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2666 add_filename_language (".c", language_c
);
2667 add_filename_language (".C", language_cplus
);
2668 add_filename_language (".cc", language_cplus
);
2669 add_filename_language (".cp", language_cplus
);
2670 add_filename_language (".cpp", language_cplus
);
2671 add_filename_language (".cxx", language_cplus
);
2672 add_filename_language (".c++", language_cplus
);
2673 add_filename_language (".java", language_java
);
2674 add_filename_language (".class", language_java
);
2675 add_filename_language (".m", language_objc
);
2676 add_filename_language (".f", language_fortran
);
2677 add_filename_language (".F", language_fortran
);
2678 add_filename_language (".s", language_asm
);
2679 add_filename_language (".sx", language_asm
);
2680 add_filename_language (".S", language_asm
);
2681 add_filename_language (".pas", language_pascal
);
2682 add_filename_language (".p", language_pascal
);
2683 add_filename_language (".pp", language_pascal
);
2684 add_filename_language (".adb", language_ada
);
2685 add_filename_language (".ads", language_ada
);
2686 add_filename_language (".a", language_ada
);
2687 add_filename_language (".ada", language_ada
);
2692 deduce_language_from_filename (char *filename
)
2697 if (filename
!= NULL
)
2698 if ((cp
= strrchr (filename
, '.')) != NULL
)
2699 for (i
= 0; i
< fl_table_next
; i
++)
2700 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2701 return filename_language_table
[i
].lang
;
2703 return language_unknown
;
2708 Allocate and partly initialize a new symbol table. Return a pointer
2709 to it. error() if no space.
2711 Caller must set these fields:
2717 possibly free_named_symtabs (symtab->filename);
2721 allocate_symtab (char *filename
, struct objfile
*objfile
)
2723 struct symtab
*symtab
;
2725 symtab
= (struct symtab
*)
2726 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2727 memset (symtab
, 0, sizeof (*symtab
));
2728 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2729 &objfile
->objfile_obstack
);
2730 symtab
->fullname
= NULL
;
2731 symtab
->language
= deduce_language_from_filename (filename
);
2732 symtab
->debugformat
= obsavestring ("unknown", 7,
2733 &objfile
->objfile_obstack
);
2735 /* Hook it to the objfile it comes from */
2737 symtab
->objfile
= objfile
;
2738 symtab
->next
= objfile
->symtabs
;
2739 objfile
->symtabs
= symtab
;
2744 struct partial_symtab
*
2745 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2747 struct partial_symtab
*psymtab
;
2749 if (objfile
->free_psymtabs
)
2751 psymtab
= objfile
->free_psymtabs
;
2752 objfile
->free_psymtabs
= psymtab
->next
;
2755 psymtab
= (struct partial_symtab
*)
2756 obstack_alloc (&objfile
->objfile_obstack
,
2757 sizeof (struct partial_symtab
));
2759 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2760 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2761 &objfile
->objfile_obstack
);
2762 psymtab
->symtab
= NULL
;
2764 /* Prepend it to the psymtab list for the objfile it belongs to.
2765 Psymtabs are searched in most recent inserted -> least recent
2768 psymtab
->objfile
= objfile
;
2769 psymtab
->next
= objfile
->psymtabs
;
2770 objfile
->psymtabs
= psymtab
;
2773 struct partial_symtab
**prev_pst
;
2774 psymtab
->objfile
= objfile
;
2775 psymtab
->next
= NULL
;
2776 prev_pst
= &(objfile
->psymtabs
);
2777 while ((*prev_pst
) != NULL
)
2778 prev_pst
= &((*prev_pst
)->next
);
2779 (*prev_pst
) = psymtab
;
2787 discard_psymtab (struct partial_symtab
*pst
)
2789 struct partial_symtab
**prev_pst
;
2792 Empty psymtabs happen as a result of header files which don't
2793 have any symbols in them. There can be a lot of them. But this
2794 check is wrong, in that a psymtab with N_SLINE entries but
2795 nothing else is not empty, but we don't realize that. Fixing
2796 that without slowing things down might be tricky. */
2798 /* First, snip it out of the psymtab chain */
2800 prev_pst
= &(pst
->objfile
->psymtabs
);
2801 while ((*prev_pst
) != pst
)
2802 prev_pst
= &((*prev_pst
)->next
);
2803 (*prev_pst
) = pst
->next
;
2805 /* Next, put it on a free list for recycling */
2807 pst
->next
= pst
->objfile
->free_psymtabs
;
2808 pst
->objfile
->free_psymtabs
= pst
;
2812 /* Reset all data structures in gdb which may contain references to symbol
2816 clear_symtab_users (void)
2818 /* Someday, we should do better than this, by only blowing away
2819 the things that really need to be blown. */
2821 /* Clear the "current" symtab first, because it is no longer valid.
2822 breakpoint_re_set may try to access the current symtab. */
2823 clear_current_source_symtab_and_line ();
2826 breakpoint_re_set ();
2827 set_default_breakpoint (0, 0, 0, 0);
2828 clear_pc_function_cache ();
2829 observer_notify_new_objfile (NULL
);
2831 /* Clear globals which might have pointed into a removed objfile.
2832 FIXME: It's not clear which of these are supposed to persist
2833 between expressions and which ought to be reset each time. */
2834 expression_context_block
= NULL
;
2835 innermost_block
= NULL
;
2837 /* Varobj may refer to old symbols, perform a cleanup. */
2838 varobj_invalidate ();
2843 clear_symtab_users_cleanup (void *ignore
)
2845 clear_symtab_users ();
2848 /* clear_symtab_users_once:
2850 This function is run after symbol reading, or from a cleanup.
2851 If an old symbol table was obsoleted, the old symbol table
2852 has been blown away, but the other GDB data structures that may
2853 reference it have not yet been cleared or re-directed. (The old
2854 symtab was zapped, and the cleanup queued, in free_named_symtab()
2857 This function can be queued N times as a cleanup, or called
2858 directly; it will do all the work the first time, and then will be a
2859 no-op until the next time it is queued. This works by bumping a
2860 counter at queueing time. Much later when the cleanup is run, or at
2861 the end of symbol processing (in case the cleanup is discarded), if
2862 the queued count is greater than the "done-count", we do the work
2863 and set the done-count to the queued count. If the queued count is
2864 less than or equal to the done-count, we just ignore the call. This
2865 is needed because reading a single .o file will often replace many
2866 symtabs (one per .h file, for example), and we don't want to reset
2867 the breakpoints N times in the user's face.
2869 The reason we both queue a cleanup, and call it directly after symbol
2870 reading, is because the cleanup protects us in case of errors, but is
2871 discarded if symbol reading is successful. */
2874 /* FIXME: As free_named_symtabs is currently a big noop this function
2875 is no longer needed. */
2876 static void clear_symtab_users_once (void);
2878 static int clear_symtab_users_queued
;
2879 static int clear_symtab_users_done
;
2882 clear_symtab_users_once (void)
2884 /* Enforce once-per-`do_cleanups'-semantics */
2885 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2887 clear_symtab_users_done
= clear_symtab_users_queued
;
2889 clear_symtab_users ();
2893 /* Delete the specified psymtab, and any others that reference it. */
2896 cashier_psymtab (struct partial_symtab
*pst
)
2898 struct partial_symtab
*ps
, *pprev
= NULL
;
2901 /* Find its previous psymtab in the chain */
2902 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2911 /* Unhook it from the chain. */
2912 if (ps
== pst
->objfile
->psymtabs
)
2913 pst
->objfile
->psymtabs
= ps
->next
;
2915 pprev
->next
= ps
->next
;
2917 /* FIXME, we can't conveniently deallocate the entries in the
2918 partial_symbol lists (global_psymbols/static_psymbols) that
2919 this psymtab points to. These just take up space until all
2920 the psymtabs are reclaimed. Ditto the dependencies list and
2921 filename, which are all in the objfile_obstack. */
2923 /* We need to cashier any psymtab that has this one as a dependency... */
2925 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2927 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2929 if (ps
->dependencies
[i
] == pst
)
2931 cashier_psymtab (ps
);
2932 goto again
; /* Must restart, chain has been munged. */
2939 /* If a symtab or psymtab for filename NAME is found, free it along
2940 with any dependent breakpoints, displays, etc.
2941 Used when loading new versions of object modules with the "add-file"
2942 command. This is only called on the top-level symtab or psymtab's name;
2943 it is not called for subsidiary files such as .h files.
2945 Return value is 1 if we blew away the environment, 0 if not.
2946 FIXME. The return value appears to never be used.
2948 FIXME. I think this is not the best way to do this. We should
2949 work on being gentler to the environment while still cleaning up
2950 all stray pointers into the freed symtab. */
2953 free_named_symtabs (char *name
)
2956 /* FIXME: With the new method of each objfile having it's own
2957 psymtab list, this function needs serious rethinking. In particular,
2958 why was it ever necessary to toss psymtabs with specific compilation
2959 unit filenames, as opposed to all psymtabs from a particular symbol
2961 Well, the answer is that some systems permit reloading of particular
2962 compilation units. We want to blow away any old info about these
2963 compilation units, regardless of which objfiles they arrived in. --gnu. */
2966 struct symtab
*prev
;
2967 struct partial_symtab
*ps
;
2968 struct blockvector
*bv
;
2971 /* We only wack things if the symbol-reload switch is set. */
2972 if (!symbol_reloading
)
2975 /* Some symbol formats have trouble providing file names... */
2976 if (name
== 0 || *name
== '\0')
2979 /* Look for a psymtab with the specified name. */
2982 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2984 if (strcmp (name
, ps
->filename
) == 0)
2986 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2987 goto again2
; /* Must restart, chain has been munged */
2991 /* Look for a symtab with the specified name. */
2993 for (s
= symtab_list
; s
; s
= s
->next
)
2995 if (strcmp (name
, s
->filename
) == 0)
3002 if (s
== symtab_list
)
3003 symtab_list
= s
->next
;
3005 prev
->next
= s
->next
;
3007 /* For now, queue a delete for all breakpoints, displays, etc., whether
3008 or not they depend on the symtab being freed. This should be
3009 changed so that only those data structures affected are deleted. */
3011 /* But don't delete anything if the symtab is empty.
3012 This test is necessary due to a bug in "dbxread.c" that
3013 causes empty symtabs to be created for N_SO symbols that
3014 contain the pathname of the object file. (This problem
3015 has been fixed in GDB 3.9x). */
3017 bv
= BLOCKVECTOR (s
);
3018 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
3019 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
3020 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
3022 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
3024 clear_symtab_users_queued
++;
3025 make_cleanup (clear_symtab_users_once
, 0);
3029 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
3036 /* It is still possible that some breakpoints will be affected
3037 even though no symtab was found, since the file might have
3038 been compiled without debugging, and hence not be associated
3039 with a symtab. In order to handle this correctly, we would need
3040 to keep a list of text address ranges for undebuggable files.
3041 For now, we do nothing, since this is a fairly obscure case. */
3045 /* FIXME, what about the minimal symbol table? */
3052 /* Allocate and partially fill a partial symtab. It will be
3053 completely filled at the end of the symbol list.
3055 FILENAME is the name of the symbol-file we are reading from. */
3057 struct partial_symtab
*
3058 start_psymtab_common (struct objfile
*objfile
,
3059 struct section_offsets
*section_offsets
, char *filename
,
3060 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
3061 struct partial_symbol
**static_syms
)
3063 struct partial_symtab
*psymtab
;
3065 psymtab
= allocate_psymtab (filename
, objfile
);
3066 psymtab
->section_offsets
= section_offsets
;
3067 psymtab
->textlow
= textlow
;
3068 psymtab
->texthigh
= psymtab
->textlow
; /* default */
3069 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
3070 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
3074 /* Helper function, initialises partial symbol structure and stashes
3075 it into objfile's bcache. Note that our caching mechanism will
3076 use all fields of struct partial_symbol to determine hash value of the
3077 structure. In other words, having two symbols with the same name but
3078 different domain (or address) is possible and correct. */
3080 static const struct partial_symbol
*
3081 add_psymbol_to_bcache (char *name
, int namelength
, domain_enum domain
,
3082 enum address_class
class,
3083 long val
, /* Value as a long */
3084 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3085 enum language language
, struct objfile
*objfile
,
3089 /* psymbol is static so that there will be no uninitialized gaps in the
3090 structure which might contain random data, causing cache misses in
3092 static struct partial_symbol psymbol
;
3094 if (name
[namelength
] != '\0')
3096 buf
= alloca (namelength
+ 1);
3097 /* Create local copy of the partial symbol */
3098 memcpy (buf
, name
, namelength
);
3099 buf
[namelength
] = '\0';
3101 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
3104 SYMBOL_VALUE (&psymbol
) = val
;
3108 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
3110 SYMBOL_SECTION (&psymbol
) = 0;
3111 SYMBOL_LANGUAGE (&psymbol
) = language
;
3112 PSYMBOL_DOMAIN (&psymbol
) = domain
;
3113 PSYMBOL_CLASS (&psymbol
) = class;
3115 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
3117 /* Stash the partial symbol away in the cache */
3118 return bcache_full (&psymbol
, sizeof (struct partial_symbol
),
3119 objfile
->psymbol_cache
, added
);
3122 /* Helper function, adds partial symbol to the given partial symbol
3126 append_psymbol_to_list (struct psymbol_allocation_list
*list
,
3127 const struct partial_symbol
*psym
,
3128 struct objfile
*objfile
)
3130 if (list
->next
>= list
->list
+ list
->size
)
3131 extend_psymbol_list (list
, objfile
);
3132 *list
->next
++ = (struct partial_symbol
*) psym
;
3133 OBJSTAT (objfile
, n_psyms
++);
3136 /* Add a symbol with a long value to a psymtab.
3137 Since one arg is a struct, we pass in a ptr and deref it (sigh).
3138 Return the partial symbol that has been added. */
3140 /* NOTE: carlton/2003-09-11: The reason why we return the partial
3141 symbol is so that callers can get access to the symbol's demangled
3142 name, which they don't have any cheap way to determine otherwise.
3143 (Currenly, dwarf2read.c is the only file who uses that information,
3144 though it's possible that other readers might in the future.)
3145 Elena wasn't thrilled about that, and I don't blame her, but we
3146 couldn't come up with a better way to get that information. If
3147 it's needed in other situations, we could consider breaking up
3148 SYMBOL_SET_NAMES to provide access to the demangled name lookup
3151 const struct partial_symbol
*
3152 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
3153 enum address_class
class,
3154 struct psymbol_allocation_list
*list
,
3155 long val
, /* Value as a long */
3156 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3157 enum language language
, struct objfile
*objfile
)
3159 const struct partial_symbol
*psym
;
3163 /* Stash the partial symbol away in the cache */
3164 psym
= add_psymbol_to_bcache (name
, namelength
, domain
, class,
3165 val
, coreaddr
, language
, objfile
, &added
);
3167 /* Do not duplicate global partial symbols. */
3168 if (list
== &objfile
->global_psymbols
3172 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
3173 append_psymbol_to_list (list
, psym
, objfile
);
3177 /* Initialize storage for partial symbols. */
3180 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
3182 /* Free any previously allocated psymbol lists. */
3184 if (objfile
->global_psymbols
.list
)
3186 xfree (objfile
->global_psymbols
.list
);
3188 if (objfile
->static_psymbols
.list
)
3190 xfree (objfile
->static_psymbols
.list
);
3193 /* Current best guess is that approximately a twentieth
3194 of the total symbols (in a debugging file) are global or static
3197 objfile
->global_psymbols
.size
= total_symbols
/ 10;
3198 objfile
->static_psymbols
.size
= total_symbols
/ 10;
3200 if (objfile
->global_psymbols
.size
> 0)
3202 objfile
->global_psymbols
.next
=
3203 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
3204 xmalloc ((objfile
->global_psymbols
.size
3205 * sizeof (struct partial_symbol
*)));
3207 if (objfile
->static_psymbols
.size
> 0)
3209 objfile
->static_psymbols
.next
=
3210 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
3211 xmalloc ((objfile
->static_psymbols
.size
3212 * sizeof (struct partial_symbol
*)));
3217 The following code implements an abstraction for debugging overlay sections.
3219 The target model is as follows:
3220 1) The gnu linker will permit multiple sections to be mapped into the
3221 same VMA, each with its own unique LMA (or load address).
3222 2) It is assumed that some runtime mechanism exists for mapping the
3223 sections, one by one, from the load address into the VMA address.
3224 3) This code provides a mechanism for gdb to keep track of which
3225 sections should be considered to be mapped from the VMA to the LMA.
3226 This information is used for symbol lookup, and memory read/write.
3227 For instance, if a section has been mapped then its contents
3228 should be read from the VMA, otherwise from the LMA.
3230 Two levels of debugger support for overlays are available. One is
3231 "manual", in which the debugger relies on the user to tell it which
3232 overlays are currently mapped. This level of support is
3233 implemented entirely in the core debugger, and the information about
3234 whether a section is mapped is kept in the objfile->obj_section table.
3236 The second level of support is "automatic", and is only available if
3237 the target-specific code provides functionality to read the target's
3238 overlay mapping table, and translate its contents for the debugger
3239 (by updating the mapped state information in the obj_section tables).
3241 The interface is as follows:
3243 overlay map <name> -- tell gdb to consider this section mapped
3244 overlay unmap <name> -- tell gdb to consider this section unmapped
3245 overlay list -- list the sections that GDB thinks are mapped
3246 overlay read-target -- get the target's state of what's mapped
3247 overlay off/manual/auto -- set overlay debugging state
3248 Functional interface:
3249 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3250 section, return that section.
3251 find_pc_overlay(pc): find any overlay section that contains
3252 the pc, either in its VMA or its LMA
3253 section_is_mapped(sect): true if overlay is marked as mapped
3254 section_is_overlay(sect): true if section's VMA != LMA
3255 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3256 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3257 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3258 overlay_mapped_address(...): map an address from section's LMA to VMA
3259 overlay_unmapped_address(...): map an address from section's VMA to LMA
3260 symbol_overlayed_address(...): Return a "current" address for symbol:
3261 either in VMA or LMA depending on whether
3262 the symbol's section is currently mapped
3265 /* Overlay debugging state: */
3267 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3268 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
3270 /* Function: section_is_overlay (SECTION)
3271 Returns true if SECTION has VMA not equal to LMA, ie.
3272 SECTION is loaded at an address different from where it will "run". */
3275 section_is_overlay (struct obj_section
*section
)
3277 if (overlay_debugging
&& section
)
3279 bfd
*abfd
= section
->objfile
->obfd
;
3280 asection
*bfd_section
= section
->the_bfd_section
;
3282 if (bfd_section_lma (abfd
, bfd_section
) != 0
3283 && bfd_section_lma (abfd
, bfd_section
)
3284 != bfd_section_vma (abfd
, bfd_section
))
3291 /* Function: overlay_invalidate_all (void)
3292 Invalidate the mapped state of all overlay sections (mark it as stale). */
3295 overlay_invalidate_all (void)
3297 struct objfile
*objfile
;
3298 struct obj_section
*sect
;
3300 ALL_OBJSECTIONS (objfile
, sect
)
3301 if (section_is_overlay (sect
))
3302 sect
->ovly_mapped
= -1;
3305 /* Function: section_is_mapped (SECTION)
3306 Returns true if section is an overlay, and is currently mapped.
3308 Access to the ovly_mapped flag is restricted to this function, so
3309 that we can do automatic update. If the global flag
3310 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3311 overlay_invalidate_all. If the mapped state of the particular
3312 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3315 section_is_mapped (struct obj_section
*osect
)
3317 struct gdbarch
*gdbarch
;
3319 if (osect
== 0 || !section_is_overlay (osect
))
3322 switch (overlay_debugging
)
3326 return 0; /* overlay debugging off */
3327 case ovly_auto
: /* overlay debugging automatic */
3328 /* Unles there is a gdbarch_overlay_update function,
3329 there's really nothing useful to do here (can't really go auto) */
3330 gdbarch
= get_objfile_arch (osect
->objfile
);
3331 if (gdbarch_overlay_update_p (gdbarch
))
3333 if (overlay_cache_invalid
)
3335 overlay_invalidate_all ();
3336 overlay_cache_invalid
= 0;
3338 if (osect
->ovly_mapped
== -1)
3339 gdbarch_overlay_update (gdbarch
, osect
);
3341 /* fall thru to manual case */
3342 case ovly_on
: /* overlay debugging manual */
3343 return osect
->ovly_mapped
== 1;
3347 /* Function: pc_in_unmapped_range
3348 If PC falls into the lma range of SECTION, return true, else false. */
3351 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3353 if (section_is_overlay (section
))
3355 bfd
*abfd
= section
->objfile
->obfd
;
3356 asection
*bfd_section
= section
->the_bfd_section
;
3358 /* We assume the LMA is relocated by the same offset as the VMA. */
3359 bfd_vma size
= bfd_get_section_size (bfd_section
);
3360 CORE_ADDR offset
= obj_section_offset (section
);
3362 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3363 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3370 /* Function: pc_in_mapped_range
3371 If PC falls into the vma range of SECTION, return true, else false. */
3374 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3376 if (section_is_overlay (section
))
3378 if (obj_section_addr (section
) <= pc
3379 && pc
< obj_section_endaddr (section
))
3387 /* Return true if the mapped ranges of sections A and B overlap, false
3390 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3392 CORE_ADDR a_start
= obj_section_addr (a
);
3393 CORE_ADDR a_end
= obj_section_endaddr (a
);
3394 CORE_ADDR b_start
= obj_section_addr (b
);
3395 CORE_ADDR b_end
= obj_section_endaddr (b
);
3397 return (a_start
< b_end
&& b_start
< a_end
);
3400 /* Function: overlay_unmapped_address (PC, SECTION)
3401 Returns the address corresponding to PC in the unmapped (load) range.
3402 May be the same as PC. */
3405 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3407 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3409 bfd
*abfd
= section
->objfile
->obfd
;
3410 asection
*bfd_section
= section
->the_bfd_section
;
3412 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3413 - bfd_section_vma (abfd
, bfd_section
);
3419 /* Function: overlay_mapped_address (PC, SECTION)
3420 Returns the address corresponding to PC in the mapped (runtime) range.
3421 May be the same as PC. */
3424 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3426 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3428 bfd
*abfd
= section
->objfile
->obfd
;
3429 asection
*bfd_section
= section
->the_bfd_section
;
3431 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3432 - bfd_section_lma (abfd
, bfd_section
);
3439 /* Function: symbol_overlayed_address
3440 Return one of two addresses (relative to the VMA or to the LMA),
3441 depending on whether the section is mapped or not. */
3444 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3446 if (overlay_debugging
)
3448 /* If the symbol has no section, just return its regular address. */
3451 /* If the symbol's section is not an overlay, just return its address */
3452 if (!section_is_overlay (section
))
3454 /* If the symbol's section is mapped, just return its address */
3455 if (section_is_mapped (section
))
3458 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3459 * then return its LOADED address rather than its vma address!!
3461 return overlay_unmapped_address (address
, section
);
3466 /* Function: find_pc_overlay (PC)
3467 Return the best-match overlay section for PC:
3468 If PC matches a mapped overlay section's VMA, return that section.
3469 Else if PC matches an unmapped section's VMA, return that section.
3470 Else if PC matches an unmapped section's LMA, return that section. */
3472 struct obj_section
*
3473 find_pc_overlay (CORE_ADDR pc
)
3475 struct objfile
*objfile
;
3476 struct obj_section
*osect
, *best_match
= NULL
;
3478 if (overlay_debugging
)
3479 ALL_OBJSECTIONS (objfile
, osect
)
3480 if (section_is_overlay (osect
))
3482 if (pc_in_mapped_range (pc
, osect
))
3484 if (section_is_mapped (osect
))
3489 else if (pc_in_unmapped_range (pc
, osect
))
3495 /* Function: find_pc_mapped_section (PC)
3496 If PC falls into the VMA address range of an overlay section that is
3497 currently marked as MAPPED, return that section. Else return NULL. */
3499 struct obj_section
*
3500 find_pc_mapped_section (CORE_ADDR pc
)
3502 struct objfile
*objfile
;
3503 struct obj_section
*osect
;
3505 if (overlay_debugging
)
3506 ALL_OBJSECTIONS (objfile
, osect
)
3507 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3513 /* Function: list_overlays_command
3514 Print a list of mapped sections and their PC ranges */
3517 list_overlays_command (char *args
, int from_tty
)
3520 struct objfile
*objfile
;
3521 struct obj_section
*osect
;
3523 if (overlay_debugging
)
3524 ALL_OBJSECTIONS (objfile
, osect
)
3525 if (section_is_mapped (osect
))
3527 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3532 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3533 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3534 size
= bfd_get_section_size (osect
->the_bfd_section
);
3535 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3537 printf_filtered ("Section %s, loaded at ", name
);
3538 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3539 puts_filtered (" - ");
3540 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3541 printf_filtered (", mapped at ");
3542 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3543 puts_filtered (" - ");
3544 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3545 puts_filtered ("\n");
3550 printf_filtered (_("No sections are mapped.\n"));
3553 /* Function: map_overlay_command
3554 Mark the named section as mapped (ie. residing at its VMA address). */
3557 map_overlay_command (char *args
, int from_tty
)
3559 struct objfile
*objfile
, *objfile2
;
3560 struct obj_section
*sec
, *sec2
;
3562 if (!overlay_debugging
)
3564 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3565 the 'overlay manual' command."));
3567 if (args
== 0 || *args
== 0)
3568 error (_("Argument required: name of an overlay section"));
3570 /* First, find a section matching the user supplied argument */
3571 ALL_OBJSECTIONS (objfile
, sec
)
3572 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3574 /* Now, check to see if the section is an overlay. */
3575 if (!section_is_overlay (sec
))
3576 continue; /* not an overlay section */
3578 /* Mark the overlay as "mapped" */
3579 sec
->ovly_mapped
= 1;
3581 /* Next, make a pass and unmap any sections that are
3582 overlapped by this new section: */
3583 ALL_OBJSECTIONS (objfile2
, sec2
)
3584 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3587 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3588 bfd_section_name (objfile
->obfd
,
3589 sec2
->the_bfd_section
));
3590 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3594 error (_("No overlay section called %s"), args
);
3597 /* Function: unmap_overlay_command
3598 Mark the overlay section as unmapped
3599 (ie. resident in its LMA address range, rather than the VMA range). */
3602 unmap_overlay_command (char *args
, int from_tty
)
3604 struct objfile
*objfile
;
3605 struct obj_section
*sec
;
3607 if (!overlay_debugging
)
3609 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3610 the 'overlay manual' command."));
3612 if (args
== 0 || *args
== 0)
3613 error (_("Argument required: name of an overlay section"));
3615 /* First, find a section matching the user supplied argument */
3616 ALL_OBJSECTIONS (objfile
, sec
)
3617 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3619 if (!sec
->ovly_mapped
)
3620 error (_("Section %s is not mapped"), args
);
3621 sec
->ovly_mapped
= 0;
3624 error (_("No overlay section called %s"), args
);
3627 /* Function: overlay_auto_command
3628 A utility command to turn on overlay debugging.
3629 Possibly this should be done via a set/show command. */
3632 overlay_auto_command (char *args
, int from_tty
)
3634 overlay_debugging
= ovly_auto
;
3635 enable_overlay_breakpoints ();
3637 printf_unfiltered (_("Automatic overlay debugging enabled."));
3640 /* Function: overlay_manual_command
3641 A utility command to turn on overlay debugging.
3642 Possibly this should be done via a set/show command. */
3645 overlay_manual_command (char *args
, int from_tty
)
3647 overlay_debugging
= ovly_on
;
3648 disable_overlay_breakpoints ();
3650 printf_unfiltered (_("Overlay debugging enabled."));
3653 /* Function: overlay_off_command
3654 A utility command to turn on overlay debugging.
3655 Possibly this should be done via a set/show command. */
3658 overlay_off_command (char *args
, int from_tty
)
3660 overlay_debugging
= ovly_off
;
3661 disable_overlay_breakpoints ();
3663 printf_unfiltered (_("Overlay debugging disabled."));
3667 overlay_load_command (char *args
, int from_tty
)
3669 struct gdbarch
*gdbarch
= get_current_arch ();
3671 if (gdbarch_overlay_update_p (gdbarch
))
3672 gdbarch_overlay_update (gdbarch
, NULL
);
3674 error (_("This target does not know how to read its overlay state."));
3677 /* Function: overlay_command
3678 A place-holder for a mis-typed command */
3680 /* Command list chain containing all defined "overlay" subcommands. */
3681 struct cmd_list_element
*overlaylist
;
3684 overlay_command (char *args
, int from_tty
)
3687 ("\"overlay\" must be followed by the name of an overlay command.\n");
3688 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3692 /* Target Overlays for the "Simplest" overlay manager:
3694 This is GDB's default target overlay layer. It works with the
3695 minimal overlay manager supplied as an example by Cygnus. The
3696 entry point is via a function pointer "gdbarch_overlay_update",
3697 so targets that use a different runtime overlay manager can
3698 substitute their own overlay_update function and take over the
3701 The overlay_update function pokes around in the target's data structures
3702 to see what overlays are mapped, and updates GDB's overlay mapping with
3705 In this simple implementation, the target data structures are as follows:
3706 unsigned _novlys; /# number of overlay sections #/
3707 unsigned _ovly_table[_novlys][4] = {
3708 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3709 {..., ..., ..., ...},
3711 unsigned _novly_regions; /# number of overlay regions #/
3712 unsigned _ovly_region_table[_novly_regions][3] = {
3713 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3716 These functions will attempt to update GDB's mappedness state in the
3717 symbol section table, based on the target's mappedness state.
3719 To do this, we keep a cached copy of the target's _ovly_table, and
3720 attempt to detect when the cached copy is invalidated. The main
3721 entry point is "simple_overlay_update(SECT), which looks up SECT in
3722 the cached table and re-reads only the entry for that section from
3723 the target (whenever possible).
3726 /* Cached, dynamically allocated copies of the target data structures: */
3727 static unsigned (*cache_ovly_table
)[4] = 0;
3729 static unsigned (*cache_ovly_region_table
)[3] = 0;
3731 static unsigned cache_novlys
= 0;
3733 static unsigned cache_novly_regions
= 0;
3735 static CORE_ADDR cache_ovly_table_base
= 0;
3737 static CORE_ADDR cache_ovly_region_table_base
= 0;
3741 VMA
, SIZE
, LMA
, MAPPED
3744 /* Throw away the cached copy of _ovly_table */
3746 simple_free_overlay_table (void)
3748 if (cache_ovly_table
)
3749 xfree (cache_ovly_table
);
3751 cache_ovly_table
= NULL
;
3752 cache_ovly_table_base
= 0;
3756 /* Throw away the cached copy of _ovly_region_table */
3758 simple_free_overlay_region_table (void)
3760 if (cache_ovly_region_table
)
3761 xfree (cache_ovly_region_table
);
3762 cache_novly_regions
= 0;
3763 cache_ovly_region_table
= NULL
;
3764 cache_ovly_region_table_base
= 0;
3768 /* Read an array of ints of size SIZE from the target into a local buffer.
3769 Convert to host order. int LEN is number of ints */
3771 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3772 int len
, int size
, enum bfd_endian byte_order
)
3774 /* FIXME (alloca): Not safe if array is very large. */
3775 gdb_byte
*buf
= alloca (len
* size
);
3778 read_memory (memaddr
, buf
, len
* size
);
3779 for (i
= 0; i
< len
; i
++)
3780 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3783 /* Find and grab a copy of the target _ovly_table
3784 (and _novlys, which is needed for the table's size) */
3786 simple_read_overlay_table (void)
3788 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3789 struct gdbarch
*gdbarch
;
3791 enum bfd_endian byte_order
;
3793 simple_free_overlay_table ();
3794 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3797 error (_("Error reading inferior's overlay table: "
3798 "couldn't find `_novlys' variable\n"
3799 "in inferior. Use `overlay manual' mode."));
3803 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3804 if (! ovly_table_msym
)
3806 error (_("Error reading inferior's overlay table: couldn't find "
3807 "`_ovly_table' array\n"
3808 "in inferior. Use `overlay manual' mode."));
3812 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3813 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3814 byte_order
= gdbarch_byte_order (gdbarch
);
3816 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3819 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3820 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3821 read_target_long_array (cache_ovly_table_base
,
3822 (unsigned int *) cache_ovly_table
,
3823 cache_novlys
* 4, word_size
, byte_order
);
3825 return 1; /* SUCCESS */
3829 /* Find and grab a copy of the target _ovly_region_table
3830 (and _novly_regions, which is needed for the table's size) */
3832 simple_read_overlay_region_table (void)
3834 struct minimal_symbol
*msym
;
3835 struct gdbarch
*gdbarch
;
3837 enum bfd_endian byte_order
;
3839 simple_free_overlay_region_table ();
3840 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3842 return 0; /* failure */
3844 gdbarch
= get_objfile_arch (msymbol_objfile (msym
));
3845 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3846 byte_order
= gdbarch_byte_order (gdbarch
);
3848 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
),
3851 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3852 if (cache_ovly_region_table
!= NULL
)
3854 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3857 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3858 read_target_long_array (cache_ovly_region_table_base
,
3859 (unsigned int *) cache_ovly_region_table
,
3860 cache_novly_regions
* 3,
3861 word_size
, byte_order
);
3864 return 0; /* failure */
3867 return 0; /* failure */
3868 return 1; /* SUCCESS */
3872 /* Function: simple_overlay_update_1
3873 A helper function for simple_overlay_update. Assuming a cached copy
3874 of _ovly_table exists, look through it to find an entry whose vma,
3875 lma and size match those of OSECT. Re-read the entry and make sure
3876 it still matches OSECT (else the table may no longer be valid).
3877 Set OSECT's mapped state to match the entry. Return: 1 for
3878 success, 0 for failure. */
3881 simple_overlay_update_1 (struct obj_section
*osect
)
3884 bfd
*obfd
= osect
->objfile
->obfd
;
3885 asection
*bsect
= osect
->the_bfd_section
;
3886 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3887 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3888 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3890 size
= bfd_get_section_size (osect
->the_bfd_section
);
3891 for (i
= 0; i
< cache_novlys
; i
++)
3892 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3893 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3894 /* && cache_ovly_table[i][SIZE] == size */ )
3896 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3897 (unsigned int *) cache_ovly_table
[i
],
3898 4, word_size
, byte_order
);
3899 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3900 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3901 /* && cache_ovly_table[i][SIZE] == size */ )
3903 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3906 else /* Warning! Warning! Target's ovly table has changed! */
3912 /* Function: simple_overlay_update
3913 If OSECT is NULL, then update all sections' mapped state
3914 (after re-reading the entire target _ovly_table).
3915 If OSECT is non-NULL, then try to find a matching entry in the
3916 cached ovly_table and update only OSECT's mapped state.
3917 If a cached entry can't be found or the cache isn't valid, then
3918 re-read the entire cache, and go ahead and update all sections. */
3921 simple_overlay_update (struct obj_section
*osect
)
3923 struct objfile
*objfile
;
3925 /* Were we given an osect to look up? NULL means do all of them. */
3927 /* Have we got a cached copy of the target's overlay table? */
3928 if (cache_ovly_table
!= NULL
)
3929 /* Does its cached location match what's currently in the symtab? */
3930 if (cache_ovly_table_base
==
3931 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3932 /* Then go ahead and try to look up this single section in the cache */
3933 if (simple_overlay_update_1 (osect
))
3934 /* Found it! We're done. */
3937 /* Cached table no good: need to read the entire table anew.
3938 Or else we want all the sections, in which case it's actually
3939 more efficient to read the whole table in one block anyway. */
3941 if (! simple_read_overlay_table ())
3944 /* Now may as well update all sections, even if only one was requested. */
3945 ALL_OBJSECTIONS (objfile
, osect
)
3946 if (section_is_overlay (osect
))
3949 bfd
*obfd
= osect
->objfile
->obfd
;
3950 asection
*bsect
= osect
->the_bfd_section
;
3952 size
= bfd_get_section_size (bsect
);
3953 for (i
= 0; i
< cache_novlys
; i
++)
3954 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3955 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3956 /* && cache_ovly_table[i][SIZE] == size */ )
3957 { /* obj_section matches i'th entry in ovly_table */
3958 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3959 break; /* finished with inner for loop: break out */
3964 /* Set the output sections and output offsets for section SECTP in
3965 ABFD. The relocation code in BFD will read these offsets, so we
3966 need to be sure they're initialized. We map each section to itself,
3967 with no offset; this means that SECTP->vma will be honored. */
3970 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3972 sectp
->output_section
= sectp
;
3973 sectp
->output_offset
= 0;
3976 /* Relocate the contents of a debug section SECTP in ABFD. The
3977 contents are stored in BUF if it is non-NULL, or returned in a
3978 malloc'd buffer otherwise.
3980 For some platforms and debug info formats, shared libraries contain
3981 relocations against the debug sections (particularly for DWARF-2;
3982 one affected platform is PowerPC GNU/Linux, although it depends on
3983 the version of the linker in use). Also, ELF object files naturally
3984 have unresolved relocations for their debug sections. We need to apply
3985 the relocations in order to get the locations of symbols correct.
3986 Another example that may require relocation processing, is the
3987 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3991 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3993 /* We're only interested in sections with relocation
3995 if ((sectp
->flags
& SEC_RELOC
) == 0)
3998 /* We will handle section offsets properly elsewhere, so relocate as if
3999 all sections begin at 0. */
4000 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
4002 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
4005 struct symfile_segment_data
*
4006 get_symfile_segment_data (bfd
*abfd
)
4008 struct sym_fns
*sf
= find_sym_fns (abfd
);
4013 return sf
->sym_segments (abfd
);
4017 free_symfile_segment_data (struct symfile_segment_data
*data
)
4019 xfree (data
->segment_bases
);
4020 xfree (data
->segment_sizes
);
4021 xfree (data
->segment_info
);
4027 - DATA, containing segment addresses from the object file ABFD, and
4028 the mapping from ABFD's sections onto the segments that own them,
4030 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
4031 segment addresses reported by the target,
4032 store the appropriate offsets for each section in OFFSETS.
4034 If there are fewer entries in SEGMENT_BASES than there are segments
4035 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
4037 If there are more entries, then ignore the extra. The target may
4038 not be able to distinguish between an empty data segment and a
4039 missing data segment; a missing text segment is less plausible. */
4041 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
4042 struct section_offsets
*offsets
,
4043 int num_segment_bases
,
4044 const CORE_ADDR
*segment_bases
)
4049 /* It doesn't make sense to call this function unless you have some
4050 segment base addresses. */
4051 gdb_assert (segment_bases
> 0);
4053 /* If we do not have segment mappings for the object file, we
4054 can not relocate it by segments. */
4055 gdb_assert (data
!= NULL
);
4056 gdb_assert (data
->num_segments
> 0);
4058 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4060 int which
= data
->segment_info
[i
];
4062 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
4064 /* Don't bother computing offsets for sections that aren't
4065 loaded as part of any segment. */
4069 /* Use the last SEGMENT_BASES entry as the address of any extra
4070 segments mentioned in DATA->segment_info. */
4071 if (which
> num_segment_bases
)
4072 which
= num_segment_bases
;
4074 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
4075 - data
->segment_bases
[which
- 1]);
4082 symfile_find_segment_sections (struct objfile
*objfile
)
4084 bfd
*abfd
= objfile
->obfd
;
4087 struct symfile_segment_data
*data
;
4089 data
= get_symfile_segment_data (objfile
->obfd
);
4093 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
4095 free_symfile_segment_data (data
);
4099 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4102 int which
= data
->segment_info
[i
];
4106 if (objfile
->sect_index_text
== -1)
4107 objfile
->sect_index_text
= sect
->index
;
4109 if (objfile
->sect_index_rodata
== -1)
4110 objfile
->sect_index_rodata
= sect
->index
;
4112 else if (which
== 2)
4114 if (objfile
->sect_index_data
== -1)
4115 objfile
->sect_index_data
= sect
->index
;
4117 if (objfile
->sect_index_bss
== -1)
4118 objfile
->sect_index_bss
= sect
->index
;
4122 free_symfile_segment_data (data
);
4126 _initialize_symfile (void)
4128 struct cmd_list_element
*c
;
4130 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
4131 Load symbol table from executable file FILE.\n\
4132 The `file' command can also load symbol tables, as well as setting the file\n\
4133 to execute."), &cmdlist
);
4134 set_cmd_completer (c
, filename_completer
);
4136 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
4137 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
4138 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
4139 ADDR is the starting address of the file's text.\n\
4140 The optional arguments are section-name section-address pairs and\n\
4141 should be specified if the data and bss segments are not contiguous\n\
4142 with the text. SECT is a section name to be loaded at SECT_ADDR."),
4144 set_cmd_completer (c
, filename_completer
);
4146 c
= add_cmd ("load", class_files
, load_command
, _("\
4147 Dynamically load FILE into the running program, and record its symbols\n\
4148 for access from GDB.\n\
4149 A load OFFSET may also be given."), &cmdlist
);
4150 set_cmd_completer (c
, filename_completer
);
4152 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
4153 &symbol_reloading
, _("\
4154 Set dynamic symbol table reloading multiple times in one run."), _("\
4155 Show dynamic symbol table reloading multiple times in one run."), NULL
,
4157 show_symbol_reloading
,
4158 &setlist
, &showlist
);
4160 add_prefix_cmd ("overlay", class_support
, overlay_command
,
4161 _("Commands for debugging overlays."), &overlaylist
,
4162 "overlay ", 0, &cmdlist
);
4164 add_com_alias ("ovly", "overlay", class_alias
, 1);
4165 add_com_alias ("ov", "overlay", class_alias
, 1);
4167 add_cmd ("map-overlay", class_support
, map_overlay_command
,
4168 _("Assert that an overlay section is mapped."), &overlaylist
);
4170 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
4171 _("Assert that an overlay section is unmapped."), &overlaylist
);
4173 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4174 _("List mappings of overlay sections."), &overlaylist
);
4176 add_cmd ("manual", class_support
, overlay_manual_command
,
4177 _("Enable overlay debugging."), &overlaylist
);
4178 add_cmd ("off", class_support
, overlay_off_command
,
4179 _("Disable overlay debugging."), &overlaylist
);
4180 add_cmd ("auto", class_support
, overlay_auto_command
,
4181 _("Enable automatic overlay debugging."), &overlaylist
);
4182 add_cmd ("load-target", class_support
, overlay_load_command
,
4183 _("Read the overlay mapping state from the target."), &overlaylist
);
4185 /* Filename extension to source language lookup table: */
4186 init_filename_language_table ();
4187 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4189 Set mapping between filename extension and source language."), _("\
4190 Show mapping between filename extension and source language."), _("\
4191 Usage: set extension-language .foo bar"),
4192 set_ext_lang_command
,
4194 &setlist
, &showlist
);
4196 add_info ("extensions", info_ext_lang_command
,
4197 _("All filename extensions associated with a source language."));
4199 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4200 &debug_file_directory
, _("\
4201 Set the directory where separate debug symbols are searched for."), _("\
4202 Show the directory where separate debug symbols are searched for."), _("\
4203 Separate debug symbols are first searched for in the same\n\
4204 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4205 and lastly at the path of the directory of the binary with\n\
4206 the global debug-file directory prepended."),
4208 show_debug_file_directory
,
4209 &setlist
, &showlist
);
4211 add_setshow_boolean_cmd ("symbol-loading", no_class
,
4212 &print_symbol_loading
, _("\
4213 Set printing of symbol loading messages."), _("\
4214 Show printing of symbol loading messages."), NULL
,
4217 &setprintlist
, &showprintlist
);