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
))
1461 return xstrdup (debugfile
);
1474 /* This is the symbol-file command. Read the file, analyze its
1475 symbols, and add a struct symtab to a symtab list. The syntax of
1476 the command is rather bizarre:
1478 1. The function buildargv implements various quoting conventions
1479 which are undocumented and have little or nothing in common with
1480 the way things are quoted (or not quoted) elsewhere in GDB.
1482 2. Options are used, which are not generally used in GDB (perhaps
1483 "set mapped on", "set readnow on" would be better)
1485 3. The order of options matters, which is contrary to GNU
1486 conventions (because it is confusing and inconvenient). */
1489 symbol_file_command (char *args
, int from_tty
)
1495 symbol_file_clear (from_tty
);
1499 char **argv
= gdb_buildargv (args
);
1500 int flags
= OBJF_USERLOADED
;
1501 struct cleanup
*cleanups
;
1504 cleanups
= make_cleanup_freeargv (argv
);
1505 while (*argv
!= NULL
)
1507 if (strcmp (*argv
, "-readnow") == 0)
1508 flags
|= OBJF_READNOW
;
1509 else if (**argv
== '-')
1510 error (_("unknown option `%s'"), *argv
);
1513 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1521 error (_("no symbol file name was specified"));
1523 do_cleanups (cleanups
);
1527 /* Set the initial language.
1529 FIXME: A better solution would be to record the language in the
1530 psymtab when reading partial symbols, and then use it (if known) to
1531 set the language. This would be a win for formats that encode the
1532 language in an easily discoverable place, such as DWARF. For
1533 stabs, we can jump through hoops looking for specially named
1534 symbols or try to intuit the language from the specific type of
1535 stabs we find, but we can't do that until later when we read in
1539 set_initial_language (void)
1541 struct partial_symtab
*pst
;
1542 enum language lang
= language_unknown
;
1544 pst
= find_main_psymtab ();
1547 if (pst
->filename
!= NULL
)
1548 lang
= deduce_language_from_filename (pst
->filename
);
1550 if (lang
== language_unknown
)
1552 /* Make C the default language */
1556 set_language (lang
);
1557 expected_language
= current_language
; /* Don't warn the user. */
1561 /* Open the file specified by NAME and hand it off to BFD for
1562 preliminary analysis. Return a newly initialized bfd *, which
1563 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1564 absolute). In case of trouble, error() is called. */
1567 symfile_bfd_open (char *name
)
1571 char *absolute_name
;
1573 if (remote_filename_p (name
))
1575 name
= xstrdup (name
);
1576 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1579 make_cleanup (xfree
, name
);
1580 error (_("`%s': can't open to read symbols: %s."), name
,
1581 bfd_errmsg (bfd_get_error ()));
1584 if (!bfd_check_format (sym_bfd
, bfd_object
))
1586 bfd_close (sym_bfd
);
1587 make_cleanup (xfree
, name
);
1588 error (_("`%s': can't read symbols: %s."), name
,
1589 bfd_errmsg (bfd_get_error ()));
1595 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1597 /* Look down path for it, allocate 2nd new malloc'd copy. */
1598 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1599 O_RDONLY
| O_BINARY
, &absolute_name
);
1600 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1603 char *exename
= alloca (strlen (name
) + 5);
1604 strcat (strcpy (exename
, name
), ".exe");
1605 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1606 O_RDONLY
| O_BINARY
, &absolute_name
);
1611 make_cleanup (xfree
, name
);
1612 perror_with_name (name
);
1615 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1616 bfd. It'll be freed in free_objfile(). */
1618 name
= absolute_name
;
1620 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1624 make_cleanup (xfree
, name
);
1625 error (_("`%s': can't open to read symbols: %s."), name
,
1626 bfd_errmsg (bfd_get_error ()));
1628 bfd_set_cacheable (sym_bfd
, 1);
1630 if (!bfd_check_format (sym_bfd
, bfd_object
))
1632 /* FIXME: should be checking for errors from bfd_close (for one
1633 thing, on error it does not free all the storage associated
1635 bfd_close (sym_bfd
); /* This also closes desc. */
1636 make_cleanup (xfree
, name
);
1637 error (_("`%s': can't read symbols: %s."), name
,
1638 bfd_errmsg (bfd_get_error ()));
1644 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1645 the section was not found. */
1648 get_section_index (struct objfile
*objfile
, char *section_name
)
1650 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1658 /* Link SF into the global symtab_fns list. Called on startup by the
1659 _initialize routine in each object file format reader, to register
1660 information about each format the the reader is prepared to
1664 add_symtab_fns (struct sym_fns
*sf
)
1666 sf
->next
= symtab_fns
;
1670 /* Initialize OBJFILE to read symbols from its associated BFD. It
1671 either returns or calls error(). The result is an initialized
1672 struct sym_fns in the objfile structure, that contains cached
1673 information about the symbol file. */
1675 static struct sym_fns
*
1676 find_sym_fns (bfd
*abfd
)
1679 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1681 if (our_flavour
== bfd_target_srec_flavour
1682 || our_flavour
== bfd_target_ihex_flavour
1683 || our_flavour
== bfd_target_tekhex_flavour
)
1684 return NULL
; /* No symbols. */
1686 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1687 if (our_flavour
== sf
->sym_flavour
)
1690 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1691 bfd_get_target (abfd
));
1695 /* This function runs the load command of our current target. */
1698 load_command (char *arg
, int from_tty
)
1700 /* The user might be reloading because the binary has changed. Take
1701 this opportunity to check. */
1702 reopen_exec_file ();
1710 parg
= arg
= get_exec_file (1);
1712 /* Count how many \ " ' tab space there are in the name. */
1713 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1721 /* We need to quote this string so buildargv can pull it apart. */
1722 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1726 make_cleanup (xfree
, temp
);
1729 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1731 strncpy (ptemp
, prev
, parg
- prev
);
1732 ptemp
+= parg
- prev
;
1736 strcpy (ptemp
, prev
);
1742 target_load (arg
, from_tty
);
1744 /* After re-loading the executable, we don't really know which
1745 overlays are mapped any more. */
1746 overlay_cache_invalid
= 1;
1749 /* This version of "load" should be usable for any target. Currently
1750 it is just used for remote targets, not inftarg.c or core files,
1751 on the theory that only in that case is it useful.
1753 Avoiding xmodem and the like seems like a win (a) because we don't have
1754 to worry about finding it, and (b) On VMS, fork() is very slow and so
1755 we don't want to run a subprocess. On the other hand, I'm not sure how
1756 performance compares. */
1758 static int validate_download
= 0;
1760 /* Callback service function for generic_load (bfd_map_over_sections). */
1763 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1765 bfd_size_type
*sum
= data
;
1767 *sum
+= bfd_get_section_size (asec
);
1770 /* Opaque data for load_section_callback. */
1771 struct load_section_data
{
1772 unsigned long load_offset
;
1773 struct load_progress_data
*progress_data
;
1774 VEC(memory_write_request_s
) *requests
;
1777 /* Opaque data for load_progress. */
1778 struct load_progress_data
{
1779 /* Cumulative data. */
1780 unsigned long write_count
;
1781 unsigned long data_count
;
1782 bfd_size_type total_size
;
1785 /* Opaque data for load_progress for a single section. */
1786 struct load_progress_section_data
{
1787 struct load_progress_data
*cumulative
;
1789 /* Per-section data. */
1790 const char *section_name
;
1791 ULONGEST section_sent
;
1792 ULONGEST section_size
;
1797 /* Target write callback routine for progress reporting. */
1800 load_progress (ULONGEST bytes
, void *untyped_arg
)
1802 struct load_progress_section_data
*args
= untyped_arg
;
1803 struct load_progress_data
*totals
;
1806 /* Writing padding data. No easy way to get at the cumulative
1807 stats, so just ignore this. */
1810 totals
= args
->cumulative
;
1812 if (bytes
== 0 && args
->section_sent
== 0)
1814 /* The write is just starting. Let the user know we've started
1816 ui_out_message (uiout
, 0, "Loading section %s, size %s lma %s\n",
1817 args
->section_name
, hex_string (args
->section_size
),
1818 paddress (target_gdbarch
, args
->lma
));
1822 if (validate_download
)
1824 /* Broken memories and broken monitors manifest themselves here
1825 when bring new computers to life. This doubles already slow
1827 /* NOTE: cagney/1999-10-18: A more efficient implementation
1828 might add a verify_memory() method to the target vector and
1829 then use that. remote.c could implement that method using
1830 the ``qCRC'' packet. */
1831 gdb_byte
*check
= xmalloc (bytes
);
1832 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1834 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1835 error (_("Download verify read failed at %s"),
1836 paddress (target_gdbarch
, args
->lma
));
1837 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1838 error (_("Download verify compare failed at %s"),
1839 paddress (target_gdbarch
, args
->lma
));
1840 do_cleanups (verify_cleanups
);
1842 totals
->data_count
+= bytes
;
1844 args
->buffer
+= bytes
;
1845 totals
->write_count
+= 1;
1846 args
->section_sent
+= bytes
;
1848 || (deprecated_ui_load_progress_hook
!= NULL
1849 && deprecated_ui_load_progress_hook (args
->section_name
,
1850 args
->section_sent
)))
1851 error (_("Canceled the download"));
1853 if (deprecated_show_load_progress
!= NULL
)
1854 deprecated_show_load_progress (args
->section_name
,
1858 totals
->total_size
);
1861 /* Callback service function for generic_load (bfd_map_over_sections). */
1864 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1866 struct memory_write_request
*new_request
;
1867 struct load_section_data
*args
= data
;
1868 struct load_progress_section_data
*section_data
;
1869 bfd_size_type size
= bfd_get_section_size (asec
);
1871 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1873 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1879 new_request
= VEC_safe_push (memory_write_request_s
,
1880 args
->requests
, NULL
);
1881 memset (new_request
, 0, sizeof (struct memory_write_request
));
1882 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1883 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1884 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1885 new_request
->data
= xmalloc (size
);
1886 new_request
->baton
= section_data
;
1888 buffer
= new_request
->data
;
1890 section_data
->cumulative
= args
->progress_data
;
1891 section_data
->section_name
= sect_name
;
1892 section_data
->section_size
= size
;
1893 section_data
->lma
= new_request
->begin
;
1894 section_data
->buffer
= buffer
;
1896 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1899 /* Clean up an entire memory request vector, including load
1900 data and progress records. */
1903 clear_memory_write_data (void *arg
)
1905 VEC(memory_write_request_s
) **vec_p
= arg
;
1906 VEC(memory_write_request_s
) *vec
= *vec_p
;
1908 struct memory_write_request
*mr
;
1910 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1915 VEC_free (memory_write_request_s
, vec
);
1919 generic_load (char *args
, int from_tty
)
1922 struct timeval start_time
, end_time
;
1924 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1925 struct load_section_data cbdata
;
1926 struct load_progress_data total_progress
;
1931 memset (&cbdata
, 0, sizeof (cbdata
));
1932 memset (&total_progress
, 0, sizeof (total_progress
));
1933 cbdata
.progress_data
= &total_progress
;
1935 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1938 error_no_arg (_("file to load"));
1940 argv
= gdb_buildargv (args
);
1941 make_cleanup_freeargv (argv
);
1943 filename
= tilde_expand (argv
[0]);
1944 make_cleanup (xfree
, filename
);
1946 if (argv
[1] != NULL
)
1950 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1952 /* If the last word was not a valid number then
1953 treat it as a file name with spaces in. */
1954 if (argv
[1] == endptr
)
1955 error (_("Invalid download offset:%s."), argv
[1]);
1957 if (argv
[2] != NULL
)
1958 error (_("Too many parameters."));
1961 /* Open the file for loading. */
1962 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1963 if (loadfile_bfd
== NULL
)
1965 perror_with_name (filename
);
1969 /* FIXME: should be checking for errors from bfd_close (for one thing,
1970 on error it does not free all the storage associated with the
1972 make_cleanup_bfd_close (loadfile_bfd
);
1974 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1976 error (_("\"%s\" is not an object file: %s"), filename
,
1977 bfd_errmsg (bfd_get_error ()));
1980 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1981 (void *) &total_progress
.total_size
);
1983 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1985 gettimeofday (&start_time
, NULL
);
1987 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1988 load_progress
) != 0)
1989 error (_("Load failed"));
1991 gettimeofday (&end_time
, NULL
);
1993 entry
= bfd_get_start_address (loadfile_bfd
);
1994 ui_out_text (uiout
, "Start address ");
1995 ui_out_field_fmt (uiout
, "address", "%s", paddress (target_gdbarch
, entry
));
1996 ui_out_text (uiout
, ", load size ");
1997 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
1998 ui_out_text (uiout
, "\n");
1999 /* We were doing this in remote-mips.c, I suspect it is right
2000 for other targets too. */
2001 regcache_write_pc (get_current_regcache (), entry
);
2003 /* FIXME: are we supposed to call symbol_file_add or not? According
2004 to a comment from remote-mips.c (where a call to symbol_file_add
2005 was commented out), making the call confuses GDB if more than one
2006 file is loaded in. Some targets do (e.g., remote-vx.c) but
2007 others don't (or didn't - perhaps they have all been deleted). */
2009 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2010 total_progress
.write_count
,
2011 &start_time
, &end_time
);
2013 do_cleanups (old_cleanups
);
2016 /* Report how fast the transfer went. */
2018 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2019 replaced by print_transfer_performance (with a very different
2020 function signature). */
2023 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2026 struct timeval start
, end
;
2028 start
.tv_sec
= start_time
;
2030 end
.tv_sec
= end_time
;
2033 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2037 print_transfer_performance (struct ui_file
*stream
,
2038 unsigned long data_count
,
2039 unsigned long write_count
,
2040 const struct timeval
*start_time
,
2041 const struct timeval
*end_time
)
2043 ULONGEST time_count
;
2045 /* Compute the elapsed time in milliseconds, as a tradeoff between
2046 accuracy and overflow. */
2047 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2048 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2050 ui_out_text (uiout
, "Transfer rate: ");
2053 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2055 if (ui_out_is_mi_like_p (uiout
))
2057 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2058 ui_out_text (uiout
, " bits/sec");
2060 else if (rate
< 1024)
2062 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2063 ui_out_text (uiout
, " bytes/sec");
2067 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2068 ui_out_text (uiout
, " KB/sec");
2073 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2074 ui_out_text (uiout
, " bits in <1 sec");
2076 if (write_count
> 0)
2078 ui_out_text (uiout
, ", ");
2079 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2080 ui_out_text (uiout
, " bytes/write");
2082 ui_out_text (uiout
, ".\n");
2085 /* This function allows the addition of incrementally linked object files.
2086 It does not modify any state in the target, only in the debugger. */
2087 /* Note: ezannoni 2000-04-13 This function/command used to have a
2088 special case syntax for the rombug target (Rombug is the boot
2089 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2090 rombug case, the user doesn't need to supply a text address,
2091 instead a call to target_link() (in target.c) would supply the
2092 value to use. We are now discontinuing this type of ad hoc syntax. */
2095 add_symbol_file_command (char *args
, int from_tty
)
2097 struct gdbarch
*gdbarch
= get_current_arch ();
2098 char *filename
= NULL
;
2099 int flags
= OBJF_USERLOADED
;
2101 int expecting_option
= 0;
2102 int section_index
= 0;
2106 int expecting_sec_name
= 0;
2107 int expecting_sec_addr
= 0;
2116 struct section_addr_info
*section_addrs
;
2117 struct sect_opt
*sect_opts
= NULL
;
2118 size_t num_sect_opts
= 0;
2119 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2122 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2123 * sizeof (struct sect_opt
));
2128 error (_("add-symbol-file takes a file name and an address"));
2130 argv
= gdb_buildargv (args
);
2131 make_cleanup_freeargv (argv
);
2133 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2135 /* Process the argument. */
2138 /* The first argument is the file name. */
2139 filename
= tilde_expand (arg
);
2140 make_cleanup (xfree
, filename
);
2145 /* The second argument is always the text address at which
2146 to load the program. */
2147 sect_opts
[section_index
].name
= ".text";
2148 sect_opts
[section_index
].value
= arg
;
2149 if (++section_index
>= num_sect_opts
)
2152 sect_opts
= ((struct sect_opt
*)
2153 xrealloc (sect_opts
,
2155 * sizeof (struct sect_opt
)));
2160 /* It's an option (starting with '-') or it's an argument
2165 if (strcmp (arg
, "-readnow") == 0)
2166 flags
|= OBJF_READNOW
;
2167 else if (strcmp (arg
, "-s") == 0)
2169 expecting_sec_name
= 1;
2170 expecting_sec_addr
= 1;
2175 if (expecting_sec_name
)
2177 sect_opts
[section_index
].name
= arg
;
2178 expecting_sec_name
= 0;
2181 if (expecting_sec_addr
)
2183 sect_opts
[section_index
].value
= arg
;
2184 expecting_sec_addr
= 0;
2185 if (++section_index
>= num_sect_opts
)
2188 sect_opts
= ((struct sect_opt
*)
2189 xrealloc (sect_opts
,
2191 * sizeof (struct sect_opt
)));
2195 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2200 /* This command takes at least two arguments. The first one is a
2201 filename, and the second is the address where this file has been
2202 loaded. Abort now if this address hasn't been provided by the
2204 if (section_index
< 1)
2205 error (_("The address where %s has been loaded is missing"), filename
);
2207 /* Print the prompt for the query below. And save the arguments into
2208 a sect_addr_info structure to be passed around to other
2209 functions. We have to split this up into separate print
2210 statements because hex_string returns a local static
2213 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2214 section_addrs
= alloc_section_addr_info (section_index
);
2215 make_cleanup (xfree
, section_addrs
);
2216 for (i
= 0; i
< section_index
; i
++)
2219 char *val
= sect_opts
[i
].value
;
2220 char *sec
= sect_opts
[i
].name
;
2222 addr
= parse_and_eval_address (val
);
2224 /* Here we store the section offsets in the order they were
2225 entered on the command line. */
2226 section_addrs
->other
[sec_num
].name
= sec
;
2227 section_addrs
->other
[sec_num
].addr
= addr
;
2228 printf_unfiltered ("\t%s_addr = %s\n", sec
,
2229 paddress (gdbarch
, addr
));
2232 /* The object's sections are initialized when a
2233 call is made to build_objfile_section_table (objfile).
2234 This happens in reread_symbols.
2235 At this point, we don't know what file type this is,
2236 so we can't determine what section names are valid. */
2239 if (from_tty
&& (!query ("%s", "")))
2240 error (_("Not confirmed."));
2242 symbol_file_add (filename
, from_tty
? SYMFILE_VERBOSE
: 0,
2243 section_addrs
, flags
);
2245 /* Getting new symbols may change our opinion about what is
2247 reinit_frame_cache ();
2248 do_cleanups (my_cleanups
);
2252 /* Re-read symbols if a symbol-file has changed. */
2254 reread_symbols (void)
2256 struct objfile
*objfile
;
2259 struct stat new_statbuf
;
2262 /* With the addition of shared libraries, this should be modified,
2263 the load time should be saved in the partial symbol tables, since
2264 different tables may come from different source files. FIXME.
2265 This routine should then walk down each partial symbol table
2266 and see if the symbol table that it originates from has been changed */
2268 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2272 #ifdef DEPRECATED_IBM6000_TARGET
2273 /* If this object is from a shared library, then you should
2274 stat on the library name, not member name. */
2276 if (objfile
->obfd
->my_archive
)
2277 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2280 res
= stat (objfile
->name
, &new_statbuf
);
2283 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2284 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2288 new_modtime
= new_statbuf
.st_mtime
;
2289 if (new_modtime
!= objfile
->mtime
)
2291 struct cleanup
*old_cleanups
;
2292 struct section_offsets
*offsets
;
2294 char *obfd_filename
;
2296 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2299 /* There are various functions like symbol_file_add,
2300 symfile_bfd_open, syms_from_objfile, etc., which might
2301 appear to do what we want. But they have various other
2302 effects which we *don't* want. So we just do stuff
2303 ourselves. We don't worry about mapped files (for one thing,
2304 any mapped file will be out of date). */
2306 /* If we get an error, blow away this objfile (not sure if
2307 that is the correct response for things like shared
2309 old_cleanups
= make_cleanup_free_objfile (objfile
);
2310 /* We need to do this whenever any symbols go away. */
2311 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2313 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2314 bfd_get_filename (exec_bfd
)) == 0)
2316 /* Reload EXEC_BFD without asking anything. */
2318 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2321 /* Clean up any state BFD has sitting around. We don't need
2322 to close the descriptor but BFD lacks a way of closing the
2323 BFD without closing the descriptor. */
2324 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2325 if (!bfd_close (objfile
->obfd
))
2326 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2327 bfd_errmsg (bfd_get_error ()));
2328 if (remote_filename_p (obfd_filename
))
2329 objfile
->obfd
= remote_bfd_open (obfd_filename
, gnutarget
);
2331 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2332 if (objfile
->obfd
== NULL
)
2333 error (_("Can't open %s to read symbols."), objfile
->name
);
2334 /* bfd_openr sets cacheable to true, which is what we want. */
2335 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2336 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2337 bfd_errmsg (bfd_get_error ()));
2339 /* Save the offsets, we will nuke them with the rest of the
2341 num_offsets
= objfile
->num_sections
;
2342 offsets
= ((struct section_offsets
*)
2343 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2344 memcpy (offsets
, objfile
->section_offsets
,
2345 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2347 /* Remove any references to this objfile in the global
2349 preserve_values (objfile
);
2351 /* Nuke all the state that we will re-read. Much of the following
2352 code which sets things to NULL really is necessary to tell
2353 other parts of GDB that there is nothing currently there.
2355 Try to keep the freeing order compatible with free_objfile. */
2357 if (objfile
->sf
!= NULL
)
2359 (*objfile
->sf
->sym_finish
) (objfile
);
2362 clear_objfile_data (objfile
);
2364 /* FIXME: Do we have to free a whole linked list, or is this
2366 if (objfile
->global_psymbols
.list
)
2367 xfree (objfile
->global_psymbols
.list
);
2368 memset (&objfile
->global_psymbols
, 0,
2369 sizeof (objfile
->global_psymbols
));
2370 if (objfile
->static_psymbols
.list
)
2371 xfree (objfile
->static_psymbols
.list
);
2372 memset (&objfile
->static_psymbols
, 0,
2373 sizeof (objfile
->static_psymbols
));
2375 /* Free the obstacks for non-reusable objfiles */
2376 bcache_xfree (objfile
->psymbol_cache
);
2377 objfile
->psymbol_cache
= bcache_xmalloc ();
2378 bcache_xfree (objfile
->macro_cache
);
2379 objfile
->macro_cache
= bcache_xmalloc ();
2380 if (objfile
->demangled_names_hash
!= NULL
)
2382 htab_delete (objfile
->demangled_names_hash
);
2383 objfile
->demangled_names_hash
= NULL
;
2385 obstack_free (&objfile
->objfile_obstack
, 0);
2386 objfile
->sections
= NULL
;
2387 objfile
->symtabs
= NULL
;
2388 objfile
->psymtabs
= NULL
;
2389 objfile
->psymtabs_addrmap
= NULL
;
2390 objfile
->free_psymtabs
= NULL
;
2391 objfile
->cp_namespace_symtab
= NULL
;
2392 objfile
->msymbols
= NULL
;
2393 objfile
->deprecated_sym_private
= NULL
;
2394 objfile
->minimal_symbol_count
= 0;
2395 memset (&objfile
->msymbol_hash
, 0,
2396 sizeof (objfile
->msymbol_hash
));
2397 memset (&objfile
->msymbol_demangled_hash
, 0,
2398 sizeof (objfile
->msymbol_demangled_hash
));
2400 objfile
->psymbol_cache
= bcache_xmalloc ();
2401 objfile
->macro_cache
= bcache_xmalloc ();
2402 /* obstack_init also initializes the obstack so it is
2403 empty. We could use obstack_specify_allocation but
2404 gdb_obstack.h specifies the alloc/dealloc
2406 obstack_init (&objfile
->objfile_obstack
);
2407 if (build_objfile_section_table (objfile
))
2409 error (_("Can't find the file sections in `%s': %s"),
2410 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2412 terminate_minimal_symbol_table (objfile
);
2414 /* We use the same section offsets as from last time. I'm not
2415 sure whether that is always correct for shared libraries. */
2416 objfile
->section_offsets
= (struct section_offsets
*)
2417 obstack_alloc (&objfile
->objfile_obstack
,
2418 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2419 memcpy (objfile
->section_offsets
, offsets
,
2420 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2421 objfile
->num_sections
= num_offsets
;
2423 /* What the hell is sym_new_init for, anyway? The concept of
2424 distinguishing between the main file and additional files
2425 in this way seems rather dubious. */
2426 if (objfile
== symfile_objfile
)
2428 (*objfile
->sf
->sym_new_init
) (objfile
);
2431 (*objfile
->sf
->sym_init
) (objfile
);
2432 clear_complaints (&symfile_complaints
, 1, 1);
2433 /* The "mainline" parameter is a hideous hack; I think leaving it
2434 zero is OK since dbxread.c also does what it needs to do if
2435 objfile->global_psymbols.size is 0. */
2436 (*objfile
->sf
->sym_read
) (objfile
, 0);
2437 if (!have_partial_symbols () && !have_full_symbols ())
2440 printf_unfiltered (_("(no debugging symbols found)\n"));
2444 /* We're done reading the symbol file; finish off complaints. */
2445 clear_complaints (&symfile_complaints
, 0, 1);
2447 /* Getting new symbols may change our opinion about what is
2450 reinit_frame_cache ();
2452 /* Discard cleanups as symbol reading was successful. */
2453 discard_cleanups (old_cleanups
);
2455 /* If the mtime has changed between the time we set new_modtime
2456 and now, we *want* this to be out of date, so don't call stat
2458 objfile
->mtime
= new_modtime
;
2460 reread_separate_symbols (objfile
);
2461 init_entry_point_info (objfile
);
2468 clear_symtab_users ();
2469 /* At least one objfile has changed, so we can consider that
2470 the executable we're debugging has changed too. */
2471 observer_notify_executable_changed ();
2473 /* Notify objfiles that we've modified objfile sections. */
2474 objfiles_changed ();
2479 /* Handle separate debug info for OBJFILE, which has just been
2481 - If we had separate debug info before, but now we don't, get rid
2482 of the separated objfile.
2483 - If we didn't have separated debug info before, but now we do,
2484 read in the new separated debug info file.
2485 - If the debug link points to a different file, toss the old one
2486 and read the new one.
2487 This function does *not* handle the case where objfile is still
2488 using the same separate debug info file, but that file's timestamp
2489 has changed. That case should be handled by the loop in
2490 reread_symbols already. */
2492 reread_separate_symbols (struct objfile
*objfile
)
2495 unsigned long crc32
;
2497 /* Does the updated objfile's debug info live in a
2499 debug_file
= find_separate_debug_file (objfile
);
2501 if (objfile
->separate_debug_objfile
)
2503 /* There are two cases where we need to get rid of
2504 the old separated debug info objfile:
2505 - if the new primary objfile doesn't have
2506 separated debug info, or
2507 - if the new primary objfile has separate debug
2508 info, but it's under a different filename.
2510 If the old and new objfiles both have separate
2511 debug info, under the same filename, then we're
2512 okay --- if the separated file's contents have
2513 changed, we will have caught that when we
2514 visited it in this function's outermost
2517 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2518 free_objfile (objfile
->separate_debug_objfile
);
2521 /* If the new objfile has separate debug info, and we
2522 haven't loaded it already, do so now. */
2524 && ! objfile
->separate_debug_objfile
)
2526 /* Use the same section offset table as objfile itself.
2527 Preserve the flags from objfile that make sense. */
2528 objfile
->separate_debug_objfile
2529 = (symbol_file_add_with_addrs_or_offsets
2530 (symfile_bfd_open (debug_file
),
2531 info_verbose
? SYMFILE_VERBOSE
: 0,
2532 0, /* No addr table. */
2533 objfile
->section_offsets
, objfile
->num_sections
,
2534 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2535 | OBJF_USERLOADED
)));
2536 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2554 static filename_language
*filename_language_table
;
2555 static int fl_table_size
, fl_table_next
;
2558 add_filename_language (char *ext
, enum language lang
)
2560 if (fl_table_next
>= fl_table_size
)
2562 fl_table_size
+= 10;
2563 filename_language_table
=
2564 xrealloc (filename_language_table
,
2565 fl_table_size
* sizeof (*filename_language_table
));
2568 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2569 filename_language_table
[fl_table_next
].lang
= lang
;
2573 static char *ext_args
;
2575 show_ext_args (struct ui_file
*file
, int from_tty
,
2576 struct cmd_list_element
*c
, const char *value
)
2578 fprintf_filtered (file
, _("\
2579 Mapping between filename extension and source language is \"%s\".\n"),
2584 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2587 char *cp
= ext_args
;
2590 /* First arg is filename extension, starting with '.' */
2592 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2594 /* Find end of first arg. */
2595 while (*cp
&& !isspace (*cp
))
2599 error (_("'%s': two arguments required -- filename extension and language"),
2602 /* Null-terminate first arg */
2605 /* Find beginning of second arg, which should be a source language. */
2606 while (*cp
&& isspace (*cp
))
2610 error (_("'%s': two arguments required -- filename extension and language"),
2613 /* Lookup the language from among those we know. */
2614 lang
= language_enum (cp
);
2616 /* Now lookup the filename extension: do we already know it? */
2617 for (i
= 0; i
< fl_table_next
; i
++)
2618 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2621 if (i
>= fl_table_next
)
2623 /* new file extension */
2624 add_filename_language (ext_args
, lang
);
2628 /* redefining a previously known filename extension */
2631 /* query ("Really make files of type %s '%s'?", */
2632 /* ext_args, language_str (lang)); */
2634 xfree (filename_language_table
[i
].ext
);
2635 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2636 filename_language_table
[i
].lang
= lang
;
2641 info_ext_lang_command (char *args
, int from_tty
)
2645 printf_filtered (_("Filename extensions and the languages they represent:"));
2646 printf_filtered ("\n\n");
2647 for (i
= 0; i
< fl_table_next
; i
++)
2648 printf_filtered ("\t%s\t- %s\n",
2649 filename_language_table
[i
].ext
,
2650 language_str (filename_language_table
[i
].lang
));
2654 init_filename_language_table (void)
2656 if (fl_table_size
== 0) /* protect against repetition */
2660 filename_language_table
=
2661 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2662 add_filename_language (".c", language_c
);
2663 add_filename_language (".C", language_cplus
);
2664 add_filename_language (".cc", language_cplus
);
2665 add_filename_language (".cp", language_cplus
);
2666 add_filename_language (".cpp", language_cplus
);
2667 add_filename_language (".cxx", language_cplus
);
2668 add_filename_language (".c++", language_cplus
);
2669 add_filename_language (".java", language_java
);
2670 add_filename_language (".class", language_java
);
2671 add_filename_language (".m", language_objc
);
2672 add_filename_language (".f", language_fortran
);
2673 add_filename_language (".F", language_fortran
);
2674 add_filename_language (".s", language_asm
);
2675 add_filename_language (".sx", language_asm
);
2676 add_filename_language (".S", language_asm
);
2677 add_filename_language (".pas", language_pascal
);
2678 add_filename_language (".p", language_pascal
);
2679 add_filename_language (".pp", language_pascal
);
2680 add_filename_language (".adb", language_ada
);
2681 add_filename_language (".ads", language_ada
);
2682 add_filename_language (".a", language_ada
);
2683 add_filename_language (".ada", language_ada
);
2688 deduce_language_from_filename (char *filename
)
2693 if (filename
!= NULL
)
2694 if ((cp
= strrchr (filename
, '.')) != NULL
)
2695 for (i
= 0; i
< fl_table_next
; i
++)
2696 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2697 return filename_language_table
[i
].lang
;
2699 return language_unknown
;
2704 Allocate and partly initialize a new symbol table. Return a pointer
2705 to it. error() if no space.
2707 Caller must set these fields:
2713 possibly free_named_symtabs (symtab->filename);
2717 allocate_symtab (char *filename
, struct objfile
*objfile
)
2719 struct symtab
*symtab
;
2721 symtab
= (struct symtab
*)
2722 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2723 memset (symtab
, 0, sizeof (*symtab
));
2724 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2725 &objfile
->objfile_obstack
);
2726 symtab
->fullname
= NULL
;
2727 symtab
->language
= deduce_language_from_filename (filename
);
2728 symtab
->debugformat
= obsavestring ("unknown", 7,
2729 &objfile
->objfile_obstack
);
2731 /* Hook it to the objfile it comes from */
2733 symtab
->objfile
= objfile
;
2734 symtab
->next
= objfile
->symtabs
;
2735 objfile
->symtabs
= symtab
;
2740 struct partial_symtab
*
2741 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2743 struct partial_symtab
*psymtab
;
2745 if (objfile
->free_psymtabs
)
2747 psymtab
= objfile
->free_psymtabs
;
2748 objfile
->free_psymtabs
= psymtab
->next
;
2751 psymtab
= (struct partial_symtab
*)
2752 obstack_alloc (&objfile
->objfile_obstack
,
2753 sizeof (struct partial_symtab
));
2755 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2756 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2757 &objfile
->objfile_obstack
);
2758 psymtab
->symtab
= NULL
;
2760 /* Prepend it to the psymtab list for the objfile it belongs to.
2761 Psymtabs are searched in most recent inserted -> least recent
2764 psymtab
->objfile
= objfile
;
2765 psymtab
->next
= objfile
->psymtabs
;
2766 objfile
->psymtabs
= psymtab
;
2769 struct partial_symtab
**prev_pst
;
2770 psymtab
->objfile
= objfile
;
2771 psymtab
->next
= NULL
;
2772 prev_pst
= &(objfile
->psymtabs
);
2773 while ((*prev_pst
) != NULL
)
2774 prev_pst
= &((*prev_pst
)->next
);
2775 (*prev_pst
) = psymtab
;
2783 discard_psymtab (struct partial_symtab
*pst
)
2785 struct partial_symtab
**prev_pst
;
2788 Empty psymtabs happen as a result of header files which don't
2789 have any symbols in them. There can be a lot of them. But this
2790 check is wrong, in that a psymtab with N_SLINE entries but
2791 nothing else is not empty, but we don't realize that. Fixing
2792 that without slowing things down might be tricky. */
2794 /* First, snip it out of the psymtab chain */
2796 prev_pst
= &(pst
->objfile
->psymtabs
);
2797 while ((*prev_pst
) != pst
)
2798 prev_pst
= &((*prev_pst
)->next
);
2799 (*prev_pst
) = pst
->next
;
2801 /* Next, put it on a free list for recycling */
2803 pst
->next
= pst
->objfile
->free_psymtabs
;
2804 pst
->objfile
->free_psymtabs
= pst
;
2808 /* Reset all data structures in gdb which may contain references to symbol
2812 clear_symtab_users (void)
2814 /* Someday, we should do better than this, by only blowing away
2815 the things that really need to be blown. */
2817 /* Clear the "current" symtab first, because it is no longer valid.
2818 breakpoint_re_set may try to access the current symtab. */
2819 clear_current_source_symtab_and_line ();
2822 breakpoint_re_set ();
2823 set_default_breakpoint (0, 0, 0, 0);
2824 clear_pc_function_cache ();
2825 observer_notify_new_objfile (NULL
);
2827 /* Clear globals which might have pointed into a removed objfile.
2828 FIXME: It's not clear which of these are supposed to persist
2829 between expressions and which ought to be reset each time. */
2830 expression_context_block
= NULL
;
2831 innermost_block
= NULL
;
2833 /* Varobj may refer to old symbols, perform a cleanup. */
2834 varobj_invalidate ();
2839 clear_symtab_users_cleanup (void *ignore
)
2841 clear_symtab_users ();
2844 /* clear_symtab_users_once:
2846 This function is run after symbol reading, or from a cleanup.
2847 If an old symbol table was obsoleted, the old symbol table
2848 has been blown away, but the other GDB data structures that may
2849 reference it have not yet been cleared or re-directed. (The old
2850 symtab was zapped, and the cleanup queued, in free_named_symtab()
2853 This function can be queued N times as a cleanup, or called
2854 directly; it will do all the work the first time, and then will be a
2855 no-op until the next time it is queued. This works by bumping a
2856 counter at queueing time. Much later when the cleanup is run, or at
2857 the end of symbol processing (in case the cleanup is discarded), if
2858 the queued count is greater than the "done-count", we do the work
2859 and set the done-count to the queued count. If the queued count is
2860 less than or equal to the done-count, we just ignore the call. This
2861 is needed because reading a single .o file will often replace many
2862 symtabs (one per .h file, for example), and we don't want to reset
2863 the breakpoints N times in the user's face.
2865 The reason we both queue a cleanup, and call it directly after symbol
2866 reading, is because the cleanup protects us in case of errors, but is
2867 discarded if symbol reading is successful. */
2870 /* FIXME: As free_named_symtabs is currently a big noop this function
2871 is no longer needed. */
2872 static void clear_symtab_users_once (void);
2874 static int clear_symtab_users_queued
;
2875 static int clear_symtab_users_done
;
2878 clear_symtab_users_once (void)
2880 /* Enforce once-per-`do_cleanups'-semantics */
2881 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2883 clear_symtab_users_done
= clear_symtab_users_queued
;
2885 clear_symtab_users ();
2889 /* Delete the specified psymtab, and any others that reference it. */
2892 cashier_psymtab (struct partial_symtab
*pst
)
2894 struct partial_symtab
*ps
, *pprev
= NULL
;
2897 /* Find its previous psymtab in the chain */
2898 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2907 /* Unhook it from the chain. */
2908 if (ps
== pst
->objfile
->psymtabs
)
2909 pst
->objfile
->psymtabs
= ps
->next
;
2911 pprev
->next
= ps
->next
;
2913 /* FIXME, we can't conveniently deallocate the entries in the
2914 partial_symbol lists (global_psymbols/static_psymbols) that
2915 this psymtab points to. These just take up space until all
2916 the psymtabs are reclaimed. Ditto the dependencies list and
2917 filename, which are all in the objfile_obstack. */
2919 /* We need to cashier any psymtab that has this one as a dependency... */
2921 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2923 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2925 if (ps
->dependencies
[i
] == pst
)
2927 cashier_psymtab (ps
);
2928 goto again
; /* Must restart, chain has been munged. */
2935 /* If a symtab or psymtab for filename NAME is found, free it along
2936 with any dependent breakpoints, displays, etc.
2937 Used when loading new versions of object modules with the "add-file"
2938 command. This is only called on the top-level symtab or psymtab's name;
2939 it is not called for subsidiary files such as .h files.
2941 Return value is 1 if we blew away the environment, 0 if not.
2942 FIXME. The return value appears to never be used.
2944 FIXME. I think this is not the best way to do this. We should
2945 work on being gentler to the environment while still cleaning up
2946 all stray pointers into the freed symtab. */
2949 free_named_symtabs (char *name
)
2952 /* FIXME: With the new method of each objfile having it's own
2953 psymtab list, this function needs serious rethinking. In particular,
2954 why was it ever necessary to toss psymtabs with specific compilation
2955 unit filenames, as opposed to all psymtabs from a particular symbol
2957 Well, the answer is that some systems permit reloading of particular
2958 compilation units. We want to blow away any old info about these
2959 compilation units, regardless of which objfiles they arrived in. --gnu. */
2962 struct symtab
*prev
;
2963 struct partial_symtab
*ps
;
2964 struct blockvector
*bv
;
2967 /* We only wack things if the symbol-reload switch is set. */
2968 if (!symbol_reloading
)
2971 /* Some symbol formats have trouble providing file names... */
2972 if (name
== 0 || *name
== '\0')
2975 /* Look for a psymtab with the specified name. */
2978 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2980 if (strcmp (name
, ps
->filename
) == 0)
2982 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2983 goto again2
; /* Must restart, chain has been munged */
2987 /* Look for a symtab with the specified name. */
2989 for (s
= symtab_list
; s
; s
= s
->next
)
2991 if (strcmp (name
, s
->filename
) == 0)
2998 if (s
== symtab_list
)
2999 symtab_list
= s
->next
;
3001 prev
->next
= s
->next
;
3003 /* For now, queue a delete for all breakpoints, displays, etc., whether
3004 or not they depend on the symtab being freed. This should be
3005 changed so that only those data structures affected are deleted. */
3007 /* But don't delete anything if the symtab is empty.
3008 This test is necessary due to a bug in "dbxread.c" that
3009 causes empty symtabs to be created for N_SO symbols that
3010 contain the pathname of the object file. (This problem
3011 has been fixed in GDB 3.9x). */
3013 bv
= BLOCKVECTOR (s
);
3014 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
3015 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
3016 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
3018 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
3020 clear_symtab_users_queued
++;
3021 make_cleanup (clear_symtab_users_once
, 0);
3025 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
3032 /* It is still possible that some breakpoints will be affected
3033 even though no symtab was found, since the file might have
3034 been compiled without debugging, and hence not be associated
3035 with a symtab. In order to handle this correctly, we would need
3036 to keep a list of text address ranges for undebuggable files.
3037 For now, we do nothing, since this is a fairly obscure case. */
3041 /* FIXME, what about the minimal symbol table? */
3048 /* Allocate and partially fill a partial symtab. It will be
3049 completely filled at the end of the symbol list.
3051 FILENAME is the name of the symbol-file we are reading from. */
3053 struct partial_symtab
*
3054 start_psymtab_common (struct objfile
*objfile
,
3055 struct section_offsets
*section_offsets
, char *filename
,
3056 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
3057 struct partial_symbol
**static_syms
)
3059 struct partial_symtab
*psymtab
;
3061 psymtab
= allocate_psymtab (filename
, objfile
);
3062 psymtab
->section_offsets
= section_offsets
;
3063 psymtab
->textlow
= textlow
;
3064 psymtab
->texthigh
= psymtab
->textlow
; /* default */
3065 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
3066 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
3070 /* Helper function, initialises partial symbol structure and stashes
3071 it into objfile's bcache. Note that our caching mechanism will
3072 use all fields of struct partial_symbol to determine hash value of the
3073 structure. In other words, having two symbols with the same name but
3074 different domain (or address) is possible and correct. */
3076 static const struct partial_symbol
*
3077 add_psymbol_to_bcache (char *name
, int namelength
, domain_enum domain
,
3078 enum address_class
class,
3079 long val
, /* Value as a long */
3080 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3081 enum language language
, struct objfile
*objfile
,
3085 /* psymbol is static so that there will be no uninitialized gaps in the
3086 structure which might contain random data, causing cache misses in
3088 static struct partial_symbol psymbol
;
3090 if (name
[namelength
] != '\0')
3092 buf
= alloca (namelength
+ 1);
3093 /* Create local copy of the partial symbol */
3094 memcpy (buf
, name
, namelength
);
3095 buf
[namelength
] = '\0';
3097 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
3100 SYMBOL_VALUE (&psymbol
) = val
;
3104 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
3106 SYMBOL_SECTION (&psymbol
) = 0;
3107 SYMBOL_LANGUAGE (&psymbol
) = language
;
3108 PSYMBOL_DOMAIN (&psymbol
) = domain
;
3109 PSYMBOL_CLASS (&psymbol
) = class;
3111 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
3113 /* Stash the partial symbol away in the cache */
3114 return bcache_full (&psymbol
, sizeof (struct partial_symbol
),
3115 objfile
->psymbol_cache
, added
);
3118 /* Helper function, adds partial symbol to the given partial symbol
3122 append_psymbol_to_list (struct psymbol_allocation_list
*list
,
3123 const struct partial_symbol
*psym
,
3124 struct objfile
*objfile
)
3126 if (list
->next
>= list
->list
+ list
->size
)
3127 extend_psymbol_list (list
, objfile
);
3128 *list
->next
++ = (struct partial_symbol
*) psym
;
3129 OBJSTAT (objfile
, n_psyms
++);
3132 /* Add a symbol with a long value to a psymtab.
3133 Since one arg is a struct, we pass in a ptr and deref it (sigh).
3134 Return the partial symbol that has been added. */
3136 /* NOTE: carlton/2003-09-11: The reason why we return the partial
3137 symbol is so that callers can get access to the symbol's demangled
3138 name, which they don't have any cheap way to determine otherwise.
3139 (Currenly, dwarf2read.c is the only file who uses that information,
3140 though it's possible that other readers might in the future.)
3141 Elena wasn't thrilled about that, and I don't blame her, but we
3142 couldn't come up with a better way to get that information. If
3143 it's needed in other situations, we could consider breaking up
3144 SYMBOL_SET_NAMES to provide access to the demangled name lookup
3147 const struct partial_symbol
*
3148 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
3149 enum address_class
class,
3150 struct psymbol_allocation_list
*list
,
3151 long val
, /* Value as a long */
3152 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3153 enum language language
, struct objfile
*objfile
)
3155 const struct partial_symbol
*psym
;
3159 /* Stash the partial symbol away in the cache */
3160 psym
= add_psymbol_to_bcache (name
, namelength
, domain
, class,
3161 val
, coreaddr
, language
, objfile
, &added
);
3163 /* Do not duplicate global partial symbols. */
3164 if (list
== &objfile
->global_psymbols
3168 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
3169 append_psymbol_to_list (list
, psym
, objfile
);
3173 /* Initialize storage for partial symbols. */
3176 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
3178 /* Free any previously allocated psymbol lists. */
3180 if (objfile
->global_psymbols
.list
)
3182 xfree (objfile
->global_psymbols
.list
);
3184 if (objfile
->static_psymbols
.list
)
3186 xfree (objfile
->static_psymbols
.list
);
3189 /* Current best guess is that approximately a twentieth
3190 of the total symbols (in a debugging file) are global or static
3193 objfile
->global_psymbols
.size
= total_symbols
/ 10;
3194 objfile
->static_psymbols
.size
= total_symbols
/ 10;
3196 if (objfile
->global_psymbols
.size
> 0)
3198 objfile
->global_psymbols
.next
=
3199 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
3200 xmalloc ((objfile
->global_psymbols
.size
3201 * sizeof (struct partial_symbol
*)));
3203 if (objfile
->static_psymbols
.size
> 0)
3205 objfile
->static_psymbols
.next
=
3206 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
3207 xmalloc ((objfile
->static_psymbols
.size
3208 * sizeof (struct partial_symbol
*)));
3213 The following code implements an abstraction for debugging overlay sections.
3215 The target model is as follows:
3216 1) The gnu linker will permit multiple sections to be mapped into the
3217 same VMA, each with its own unique LMA (or load address).
3218 2) It is assumed that some runtime mechanism exists for mapping the
3219 sections, one by one, from the load address into the VMA address.
3220 3) This code provides a mechanism for gdb to keep track of which
3221 sections should be considered to be mapped from the VMA to the LMA.
3222 This information is used for symbol lookup, and memory read/write.
3223 For instance, if a section has been mapped then its contents
3224 should be read from the VMA, otherwise from the LMA.
3226 Two levels of debugger support for overlays are available. One is
3227 "manual", in which the debugger relies on the user to tell it which
3228 overlays are currently mapped. This level of support is
3229 implemented entirely in the core debugger, and the information about
3230 whether a section is mapped is kept in the objfile->obj_section table.
3232 The second level of support is "automatic", and is only available if
3233 the target-specific code provides functionality to read the target's
3234 overlay mapping table, and translate its contents for the debugger
3235 (by updating the mapped state information in the obj_section tables).
3237 The interface is as follows:
3239 overlay map <name> -- tell gdb to consider this section mapped
3240 overlay unmap <name> -- tell gdb to consider this section unmapped
3241 overlay list -- list the sections that GDB thinks are mapped
3242 overlay read-target -- get the target's state of what's mapped
3243 overlay off/manual/auto -- set overlay debugging state
3244 Functional interface:
3245 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3246 section, return that section.
3247 find_pc_overlay(pc): find any overlay section that contains
3248 the pc, either in its VMA or its LMA
3249 section_is_mapped(sect): true if overlay is marked as mapped
3250 section_is_overlay(sect): true if section's VMA != LMA
3251 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3252 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3253 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3254 overlay_mapped_address(...): map an address from section's LMA to VMA
3255 overlay_unmapped_address(...): map an address from section's VMA to LMA
3256 symbol_overlayed_address(...): Return a "current" address for symbol:
3257 either in VMA or LMA depending on whether
3258 the symbol's section is currently mapped
3261 /* Overlay debugging state: */
3263 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3264 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
3266 /* Function: section_is_overlay (SECTION)
3267 Returns true if SECTION has VMA not equal to LMA, ie.
3268 SECTION is loaded at an address different from where it will "run". */
3271 section_is_overlay (struct obj_section
*section
)
3273 if (overlay_debugging
&& section
)
3275 bfd
*abfd
= section
->objfile
->obfd
;
3276 asection
*bfd_section
= section
->the_bfd_section
;
3278 if (bfd_section_lma (abfd
, bfd_section
) != 0
3279 && bfd_section_lma (abfd
, bfd_section
)
3280 != bfd_section_vma (abfd
, bfd_section
))
3287 /* Function: overlay_invalidate_all (void)
3288 Invalidate the mapped state of all overlay sections (mark it as stale). */
3291 overlay_invalidate_all (void)
3293 struct objfile
*objfile
;
3294 struct obj_section
*sect
;
3296 ALL_OBJSECTIONS (objfile
, sect
)
3297 if (section_is_overlay (sect
))
3298 sect
->ovly_mapped
= -1;
3301 /* Function: section_is_mapped (SECTION)
3302 Returns true if section is an overlay, and is currently mapped.
3304 Access to the ovly_mapped flag is restricted to this function, so
3305 that we can do automatic update. If the global flag
3306 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3307 overlay_invalidate_all. If the mapped state of the particular
3308 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3311 section_is_mapped (struct obj_section
*osect
)
3313 struct gdbarch
*gdbarch
;
3315 if (osect
== 0 || !section_is_overlay (osect
))
3318 switch (overlay_debugging
)
3322 return 0; /* overlay debugging off */
3323 case ovly_auto
: /* overlay debugging automatic */
3324 /* Unles there is a gdbarch_overlay_update function,
3325 there's really nothing useful to do here (can't really go auto) */
3326 gdbarch
= get_objfile_arch (osect
->objfile
);
3327 if (gdbarch_overlay_update_p (gdbarch
))
3329 if (overlay_cache_invalid
)
3331 overlay_invalidate_all ();
3332 overlay_cache_invalid
= 0;
3334 if (osect
->ovly_mapped
== -1)
3335 gdbarch_overlay_update (gdbarch
, osect
);
3337 /* fall thru to manual case */
3338 case ovly_on
: /* overlay debugging manual */
3339 return osect
->ovly_mapped
== 1;
3343 /* Function: pc_in_unmapped_range
3344 If PC falls into the lma range of SECTION, return true, else false. */
3347 pc_in_unmapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3349 if (section_is_overlay (section
))
3351 bfd
*abfd
= section
->objfile
->obfd
;
3352 asection
*bfd_section
= section
->the_bfd_section
;
3354 /* We assume the LMA is relocated by the same offset as the VMA. */
3355 bfd_vma size
= bfd_get_section_size (bfd_section
);
3356 CORE_ADDR offset
= obj_section_offset (section
);
3358 if (bfd_get_section_lma (abfd
, bfd_section
) + offset
<= pc
3359 && pc
< bfd_get_section_lma (abfd
, bfd_section
) + offset
+ size
)
3366 /* Function: pc_in_mapped_range
3367 If PC falls into the vma range of SECTION, return true, else false. */
3370 pc_in_mapped_range (CORE_ADDR pc
, struct obj_section
*section
)
3372 if (section_is_overlay (section
))
3374 if (obj_section_addr (section
) <= pc
3375 && pc
< obj_section_endaddr (section
))
3383 /* Return true if the mapped ranges of sections A and B overlap, false
3386 sections_overlap (struct obj_section
*a
, struct obj_section
*b
)
3388 CORE_ADDR a_start
= obj_section_addr (a
);
3389 CORE_ADDR a_end
= obj_section_endaddr (a
);
3390 CORE_ADDR b_start
= obj_section_addr (b
);
3391 CORE_ADDR b_end
= obj_section_endaddr (b
);
3393 return (a_start
< b_end
&& b_start
< a_end
);
3396 /* Function: overlay_unmapped_address (PC, SECTION)
3397 Returns the address corresponding to PC in the unmapped (load) range.
3398 May be the same as PC. */
3401 overlay_unmapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3403 if (section_is_overlay (section
) && pc_in_mapped_range (pc
, section
))
3405 bfd
*abfd
= section
->objfile
->obfd
;
3406 asection
*bfd_section
= section
->the_bfd_section
;
3408 return pc
+ bfd_section_lma (abfd
, bfd_section
)
3409 - bfd_section_vma (abfd
, bfd_section
);
3415 /* Function: overlay_mapped_address (PC, SECTION)
3416 Returns the address corresponding to PC in the mapped (runtime) range.
3417 May be the same as PC. */
3420 overlay_mapped_address (CORE_ADDR pc
, struct obj_section
*section
)
3422 if (section_is_overlay (section
) && pc_in_unmapped_range (pc
, section
))
3424 bfd
*abfd
= section
->objfile
->obfd
;
3425 asection
*bfd_section
= section
->the_bfd_section
;
3427 return pc
+ bfd_section_vma (abfd
, bfd_section
)
3428 - bfd_section_lma (abfd
, bfd_section
);
3435 /* Function: symbol_overlayed_address
3436 Return one of two addresses (relative to the VMA or to the LMA),
3437 depending on whether the section is mapped or not. */
3440 symbol_overlayed_address (CORE_ADDR address
, struct obj_section
*section
)
3442 if (overlay_debugging
)
3444 /* If the symbol has no section, just return its regular address. */
3447 /* If the symbol's section is not an overlay, just return its address */
3448 if (!section_is_overlay (section
))
3450 /* If the symbol's section is mapped, just return its address */
3451 if (section_is_mapped (section
))
3454 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3455 * then return its LOADED address rather than its vma address!!
3457 return overlay_unmapped_address (address
, section
);
3462 /* Function: find_pc_overlay (PC)
3463 Return the best-match overlay section for PC:
3464 If PC matches a mapped overlay section's VMA, return that section.
3465 Else if PC matches an unmapped section's VMA, return that section.
3466 Else if PC matches an unmapped section's LMA, return that section. */
3468 struct obj_section
*
3469 find_pc_overlay (CORE_ADDR pc
)
3471 struct objfile
*objfile
;
3472 struct obj_section
*osect
, *best_match
= NULL
;
3474 if (overlay_debugging
)
3475 ALL_OBJSECTIONS (objfile
, osect
)
3476 if (section_is_overlay (osect
))
3478 if (pc_in_mapped_range (pc
, osect
))
3480 if (section_is_mapped (osect
))
3485 else if (pc_in_unmapped_range (pc
, osect
))
3491 /* Function: find_pc_mapped_section (PC)
3492 If PC falls into the VMA address range of an overlay section that is
3493 currently marked as MAPPED, return that section. Else return NULL. */
3495 struct obj_section
*
3496 find_pc_mapped_section (CORE_ADDR pc
)
3498 struct objfile
*objfile
;
3499 struct obj_section
*osect
;
3501 if (overlay_debugging
)
3502 ALL_OBJSECTIONS (objfile
, osect
)
3503 if (pc_in_mapped_range (pc
, osect
) && section_is_mapped (osect
))
3509 /* Function: list_overlays_command
3510 Print a list of mapped sections and their PC ranges */
3513 list_overlays_command (char *args
, int from_tty
)
3516 struct objfile
*objfile
;
3517 struct obj_section
*osect
;
3519 if (overlay_debugging
)
3520 ALL_OBJSECTIONS (objfile
, osect
)
3521 if (section_is_mapped (osect
))
3523 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3528 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3529 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3530 size
= bfd_get_section_size (osect
->the_bfd_section
);
3531 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3533 printf_filtered ("Section %s, loaded at ", name
);
3534 fputs_filtered (paddress (gdbarch
, lma
), gdb_stdout
);
3535 puts_filtered (" - ");
3536 fputs_filtered (paddress (gdbarch
, lma
+ size
), gdb_stdout
);
3537 printf_filtered (", mapped at ");
3538 fputs_filtered (paddress (gdbarch
, vma
), gdb_stdout
);
3539 puts_filtered (" - ");
3540 fputs_filtered (paddress (gdbarch
, vma
+ size
), gdb_stdout
);
3541 puts_filtered ("\n");
3546 printf_filtered (_("No sections are mapped.\n"));
3549 /* Function: map_overlay_command
3550 Mark the named section as mapped (ie. residing at its VMA address). */
3553 map_overlay_command (char *args
, int from_tty
)
3555 struct objfile
*objfile
, *objfile2
;
3556 struct obj_section
*sec
, *sec2
;
3558 if (!overlay_debugging
)
3560 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3561 the 'overlay manual' command."));
3563 if (args
== 0 || *args
== 0)
3564 error (_("Argument required: name of an overlay section"));
3566 /* First, find a section matching the user supplied argument */
3567 ALL_OBJSECTIONS (objfile
, sec
)
3568 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3570 /* Now, check to see if the section is an overlay. */
3571 if (!section_is_overlay (sec
))
3572 continue; /* not an overlay section */
3574 /* Mark the overlay as "mapped" */
3575 sec
->ovly_mapped
= 1;
3577 /* Next, make a pass and unmap any sections that are
3578 overlapped by this new section: */
3579 ALL_OBJSECTIONS (objfile2
, sec2
)
3580 if (sec2
->ovly_mapped
&& sec
!= sec2
&& sections_overlap (sec
, sec2
))
3583 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3584 bfd_section_name (objfile
->obfd
,
3585 sec2
->the_bfd_section
));
3586 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3590 error (_("No overlay section called %s"), args
);
3593 /* Function: unmap_overlay_command
3594 Mark the overlay section as unmapped
3595 (ie. resident in its LMA address range, rather than the VMA range). */
3598 unmap_overlay_command (char *args
, int from_tty
)
3600 struct objfile
*objfile
;
3601 struct obj_section
*sec
;
3603 if (!overlay_debugging
)
3605 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3606 the 'overlay manual' command."));
3608 if (args
== 0 || *args
== 0)
3609 error (_("Argument required: name of an overlay section"));
3611 /* First, find a section matching the user supplied argument */
3612 ALL_OBJSECTIONS (objfile
, sec
)
3613 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3615 if (!sec
->ovly_mapped
)
3616 error (_("Section %s is not mapped"), args
);
3617 sec
->ovly_mapped
= 0;
3620 error (_("No overlay section called %s"), args
);
3623 /* Function: overlay_auto_command
3624 A utility command to turn on overlay debugging.
3625 Possibly this should be done via a set/show command. */
3628 overlay_auto_command (char *args
, int from_tty
)
3630 overlay_debugging
= ovly_auto
;
3631 enable_overlay_breakpoints ();
3633 printf_unfiltered (_("Automatic overlay debugging enabled."));
3636 /* Function: overlay_manual_command
3637 A utility command to turn on overlay debugging.
3638 Possibly this should be done via a set/show command. */
3641 overlay_manual_command (char *args
, int from_tty
)
3643 overlay_debugging
= ovly_on
;
3644 disable_overlay_breakpoints ();
3646 printf_unfiltered (_("Overlay debugging enabled."));
3649 /* Function: overlay_off_command
3650 A utility command to turn on overlay debugging.
3651 Possibly this should be done via a set/show command. */
3654 overlay_off_command (char *args
, int from_tty
)
3656 overlay_debugging
= ovly_off
;
3657 disable_overlay_breakpoints ();
3659 printf_unfiltered (_("Overlay debugging disabled."));
3663 overlay_load_command (char *args
, int from_tty
)
3665 struct gdbarch
*gdbarch
= get_current_arch ();
3667 if (gdbarch_overlay_update_p (gdbarch
))
3668 gdbarch_overlay_update (gdbarch
, NULL
);
3670 error (_("This target does not know how to read its overlay state."));
3673 /* Function: overlay_command
3674 A place-holder for a mis-typed command */
3676 /* Command list chain containing all defined "overlay" subcommands. */
3677 struct cmd_list_element
*overlaylist
;
3680 overlay_command (char *args
, int from_tty
)
3683 ("\"overlay\" must be followed by the name of an overlay command.\n");
3684 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3688 /* Target Overlays for the "Simplest" overlay manager:
3690 This is GDB's default target overlay layer. It works with the
3691 minimal overlay manager supplied as an example by Cygnus. The
3692 entry point is via a function pointer "gdbarch_overlay_update",
3693 so targets that use a different runtime overlay manager can
3694 substitute their own overlay_update function and take over the
3697 The overlay_update function pokes around in the target's data structures
3698 to see what overlays are mapped, and updates GDB's overlay mapping with
3701 In this simple implementation, the target data structures are as follows:
3702 unsigned _novlys; /# number of overlay sections #/
3703 unsigned _ovly_table[_novlys][4] = {
3704 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3705 {..., ..., ..., ...},
3707 unsigned _novly_regions; /# number of overlay regions #/
3708 unsigned _ovly_region_table[_novly_regions][3] = {
3709 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3712 These functions will attempt to update GDB's mappedness state in the
3713 symbol section table, based on the target's mappedness state.
3715 To do this, we keep a cached copy of the target's _ovly_table, and
3716 attempt to detect when the cached copy is invalidated. The main
3717 entry point is "simple_overlay_update(SECT), which looks up SECT in
3718 the cached table and re-reads only the entry for that section from
3719 the target (whenever possible).
3722 /* Cached, dynamically allocated copies of the target data structures: */
3723 static unsigned (*cache_ovly_table
)[4] = 0;
3725 static unsigned (*cache_ovly_region_table
)[3] = 0;
3727 static unsigned cache_novlys
= 0;
3729 static unsigned cache_novly_regions
= 0;
3731 static CORE_ADDR cache_ovly_table_base
= 0;
3733 static CORE_ADDR cache_ovly_region_table_base
= 0;
3737 VMA
, SIZE
, LMA
, MAPPED
3740 /* Throw away the cached copy of _ovly_table */
3742 simple_free_overlay_table (void)
3744 if (cache_ovly_table
)
3745 xfree (cache_ovly_table
);
3747 cache_ovly_table
= NULL
;
3748 cache_ovly_table_base
= 0;
3752 /* Throw away the cached copy of _ovly_region_table */
3754 simple_free_overlay_region_table (void)
3756 if (cache_ovly_region_table
)
3757 xfree (cache_ovly_region_table
);
3758 cache_novly_regions
= 0;
3759 cache_ovly_region_table
= NULL
;
3760 cache_ovly_region_table_base
= 0;
3764 /* Read an array of ints of size SIZE from the target into a local buffer.
3765 Convert to host order. int LEN is number of ints */
3767 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
,
3768 int len
, int size
, enum bfd_endian byte_order
)
3770 /* FIXME (alloca): Not safe if array is very large. */
3771 gdb_byte
*buf
= alloca (len
* size
);
3774 read_memory (memaddr
, buf
, len
* size
);
3775 for (i
= 0; i
< len
; i
++)
3776 myaddr
[i
] = extract_unsigned_integer (size
* i
+ buf
, size
, byte_order
);
3779 /* Find and grab a copy of the target _ovly_table
3780 (and _novlys, which is needed for the table's size) */
3782 simple_read_overlay_table (void)
3784 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3785 struct gdbarch
*gdbarch
;
3787 enum bfd_endian byte_order
;
3789 simple_free_overlay_table ();
3790 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3793 error (_("Error reading inferior's overlay table: "
3794 "couldn't find `_novlys' variable\n"
3795 "in inferior. Use `overlay manual' mode."));
3799 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3800 if (! ovly_table_msym
)
3802 error (_("Error reading inferior's overlay table: couldn't find "
3803 "`_ovly_table' array\n"
3804 "in inferior. Use `overlay manual' mode."));
3808 gdbarch
= get_objfile_arch (msymbol_objfile (ovly_table_msym
));
3809 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3810 byte_order
= gdbarch_byte_order (gdbarch
);
3812 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
),
3815 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3816 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3817 read_target_long_array (cache_ovly_table_base
,
3818 (unsigned int *) cache_ovly_table
,
3819 cache_novlys
* 4, word_size
, byte_order
);
3821 return 1; /* SUCCESS */
3825 /* Find and grab a copy of the target _ovly_region_table
3826 (and _novly_regions, which is needed for the table's size) */
3828 simple_read_overlay_region_table (void)
3830 struct minimal_symbol
*msym
;
3831 struct gdbarch
*gdbarch
;
3833 enum bfd_endian byte_order
;
3835 simple_free_overlay_region_table ();
3836 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3838 return 0; /* failure */
3840 gdbarch
= get_objfile_arch (msymbol_objfile (msym
));
3841 word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3842 byte_order
= gdbarch_byte_order (gdbarch
);
3844 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
),
3847 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3848 if (cache_ovly_region_table
!= NULL
)
3850 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3853 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3854 read_target_long_array (cache_ovly_region_table_base
,
3855 (unsigned int *) cache_ovly_region_table
,
3856 cache_novly_regions
* 3,
3857 word_size
, byte_order
);
3860 return 0; /* failure */
3863 return 0; /* failure */
3864 return 1; /* SUCCESS */
3868 /* Function: simple_overlay_update_1
3869 A helper function for simple_overlay_update. Assuming a cached copy
3870 of _ovly_table exists, look through it to find an entry whose vma,
3871 lma and size match those of OSECT. Re-read the entry and make sure
3872 it still matches OSECT (else the table may no longer be valid).
3873 Set OSECT's mapped state to match the entry. Return: 1 for
3874 success, 0 for failure. */
3877 simple_overlay_update_1 (struct obj_section
*osect
)
3880 bfd
*obfd
= osect
->objfile
->obfd
;
3881 asection
*bsect
= osect
->the_bfd_section
;
3882 struct gdbarch
*gdbarch
= get_objfile_arch (osect
->objfile
);
3883 int word_size
= gdbarch_long_bit (gdbarch
) / TARGET_CHAR_BIT
;
3884 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
3886 size
= bfd_get_section_size (osect
->the_bfd_section
);
3887 for (i
= 0; i
< cache_novlys
; i
++)
3888 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3889 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3890 /* && cache_ovly_table[i][SIZE] == size */ )
3892 read_target_long_array (cache_ovly_table_base
+ i
* word_size
,
3893 (unsigned int *) cache_ovly_table
[i
],
3894 4, word_size
, byte_order
);
3895 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3896 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3897 /* && cache_ovly_table[i][SIZE] == size */ )
3899 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3902 else /* Warning! Warning! Target's ovly table has changed! */
3908 /* Function: simple_overlay_update
3909 If OSECT is NULL, then update all sections' mapped state
3910 (after re-reading the entire target _ovly_table).
3911 If OSECT is non-NULL, then try to find a matching entry in the
3912 cached ovly_table and update only OSECT's mapped state.
3913 If a cached entry can't be found or the cache isn't valid, then
3914 re-read the entire cache, and go ahead and update all sections. */
3917 simple_overlay_update (struct obj_section
*osect
)
3919 struct objfile
*objfile
;
3921 /* Were we given an osect to look up? NULL means do all of them. */
3923 /* Have we got a cached copy of the target's overlay table? */
3924 if (cache_ovly_table
!= NULL
)
3925 /* Does its cached location match what's currently in the symtab? */
3926 if (cache_ovly_table_base
==
3927 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3928 /* Then go ahead and try to look up this single section in the cache */
3929 if (simple_overlay_update_1 (osect
))
3930 /* Found it! We're done. */
3933 /* Cached table no good: need to read the entire table anew.
3934 Or else we want all the sections, in which case it's actually
3935 more efficient to read the whole table in one block anyway. */
3937 if (! simple_read_overlay_table ())
3940 /* Now may as well update all sections, even if only one was requested. */
3941 ALL_OBJSECTIONS (objfile
, osect
)
3942 if (section_is_overlay (osect
))
3945 bfd
*obfd
= osect
->objfile
->obfd
;
3946 asection
*bsect
= osect
->the_bfd_section
;
3948 size
= bfd_get_section_size (bsect
);
3949 for (i
= 0; i
< cache_novlys
; i
++)
3950 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3951 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3952 /* && cache_ovly_table[i][SIZE] == size */ )
3953 { /* obj_section matches i'th entry in ovly_table */
3954 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3955 break; /* finished with inner for loop: break out */
3960 /* Set the output sections and output offsets for section SECTP in
3961 ABFD. The relocation code in BFD will read these offsets, so we
3962 need to be sure they're initialized. We map each section to itself,
3963 with no offset; this means that SECTP->vma will be honored. */
3966 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3968 sectp
->output_section
= sectp
;
3969 sectp
->output_offset
= 0;
3972 /* Relocate the contents of a debug section SECTP in ABFD. The
3973 contents are stored in BUF if it is non-NULL, or returned in a
3974 malloc'd buffer otherwise.
3976 For some platforms and debug info formats, shared libraries contain
3977 relocations against the debug sections (particularly for DWARF-2;
3978 one affected platform is PowerPC GNU/Linux, although it depends on
3979 the version of the linker in use). Also, ELF object files naturally
3980 have unresolved relocations for their debug sections. We need to apply
3981 the relocations in order to get the locations of symbols correct.
3982 Another example that may require relocation processing, is the
3983 DWARF-2 .eh_frame section in .o files, although it isn't strictly a
3987 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3989 /* We're only interested in sections with relocation
3991 if ((sectp
->flags
& SEC_RELOC
) == 0)
3994 /* We will handle section offsets properly elsewhere, so relocate as if
3995 all sections begin at 0. */
3996 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3998 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
4001 struct symfile_segment_data
*
4002 get_symfile_segment_data (bfd
*abfd
)
4004 struct sym_fns
*sf
= find_sym_fns (abfd
);
4009 return sf
->sym_segments (abfd
);
4013 free_symfile_segment_data (struct symfile_segment_data
*data
)
4015 xfree (data
->segment_bases
);
4016 xfree (data
->segment_sizes
);
4017 xfree (data
->segment_info
);
4023 - DATA, containing segment addresses from the object file ABFD, and
4024 the mapping from ABFD's sections onto the segments that own them,
4026 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
4027 segment addresses reported by the target,
4028 store the appropriate offsets for each section in OFFSETS.
4030 If there are fewer entries in SEGMENT_BASES than there are segments
4031 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
4033 If there are more entries, then ignore the extra. The target may
4034 not be able to distinguish between an empty data segment and a
4035 missing data segment; a missing text segment is less plausible. */
4037 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
4038 struct section_offsets
*offsets
,
4039 int num_segment_bases
,
4040 const CORE_ADDR
*segment_bases
)
4045 /* It doesn't make sense to call this function unless you have some
4046 segment base addresses. */
4047 gdb_assert (segment_bases
> 0);
4049 /* If we do not have segment mappings for the object file, we
4050 can not relocate it by segments. */
4051 gdb_assert (data
!= NULL
);
4052 gdb_assert (data
->num_segments
> 0);
4054 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4056 int which
= data
->segment_info
[i
];
4058 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
4060 /* Don't bother computing offsets for sections that aren't
4061 loaded as part of any segment. */
4065 /* Use the last SEGMENT_BASES entry as the address of any extra
4066 segments mentioned in DATA->segment_info. */
4067 if (which
> num_segment_bases
)
4068 which
= num_segment_bases
;
4070 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
4071 - data
->segment_bases
[which
- 1]);
4078 symfile_find_segment_sections (struct objfile
*objfile
)
4080 bfd
*abfd
= objfile
->obfd
;
4083 struct symfile_segment_data
*data
;
4085 data
= get_symfile_segment_data (objfile
->obfd
);
4089 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
4091 free_symfile_segment_data (data
);
4095 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4098 int which
= data
->segment_info
[i
];
4102 if (objfile
->sect_index_text
== -1)
4103 objfile
->sect_index_text
= sect
->index
;
4105 if (objfile
->sect_index_rodata
== -1)
4106 objfile
->sect_index_rodata
= sect
->index
;
4108 else if (which
== 2)
4110 if (objfile
->sect_index_data
== -1)
4111 objfile
->sect_index_data
= sect
->index
;
4113 if (objfile
->sect_index_bss
== -1)
4114 objfile
->sect_index_bss
= sect
->index
;
4118 free_symfile_segment_data (data
);
4122 _initialize_symfile (void)
4124 struct cmd_list_element
*c
;
4126 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
4127 Load symbol table from executable file FILE.\n\
4128 The `file' command can also load symbol tables, as well as setting the file\n\
4129 to execute."), &cmdlist
);
4130 set_cmd_completer (c
, filename_completer
);
4132 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
4133 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
4134 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
4135 ADDR is the starting address of the file's text.\n\
4136 The optional arguments are section-name section-address pairs and\n\
4137 should be specified if the data and bss segments are not contiguous\n\
4138 with the text. SECT is a section name to be loaded at SECT_ADDR."),
4140 set_cmd_completer (c
, filename_completer
);
4142 c
= add_cmd ("load", class_files
, load_command
, _("\
4143 Dynamically load FILE into the running program, and record its symbols\n\
4144 for access from GDB.\n\
4145 A load OFFSET may also be given."), &cmdlist
);
4146 set_cmd_completer (c
, filename_completer
);
4148 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
4149 &symbol_reloading
, _("\
4150 Set dynamic symbol table reloading multiple times in one run."), _("\
4151 Show dynamic symbol table reloading multiple times in one run."), NULL
,
4153 show_symbol_reloading
,
4154 &setlist
, &showlist
);
4156 add_prefix_cmd ("overlay", class_support
, overlay_command
,
4157 _("Commands for debugging overlays."), &overlaylist
,
4158 "overlay ", 0, &cmdlist
);
4160 add_com_alias ("ovly", "overlay", class_alias
, 1);
4161 add_com_alias ("ov", "overlay", class_alias
, 1);
4163 add_cmd ("map-overlay", class_support
, map_overlay_command
,
4164 _("Assert that an overlay section is mapped."), &overlaylist
);
4166 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
4167 _("Assert that an overlay section is unmapped."), &overlaylist
);
4169 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4170 _("List mappings of overlay sections."), &overlaylist
);
4172 add_cmd ("manual", class_support
, overlay_manual_command
,
4173 _("Enable overlay debugging."), &overlaylist
);
4174 add_cmd ("off", class_support
, overlay_off_command
,
4175 _("Disable overlay debugging."), &overlaylist
);
4176 add_cmd ("auto", class_support
, overlay_auto_command
,
4177 _("Enable automatic overlay debugging."), &overlaylist
);
4178 add_cmd ("load-target", class_support
, overlay_load_command
,
4179 _("Read the overlay mapping state from the target."), &overlaylist
);
4181 /* Filename extension to source language lookup table: */
4182 init_filename_language_table ();
4183 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4185 Set mapping between filename extension and source language."), _("\
4186 Show mapping between filename extension and source language."), _("\
4187 Usage: set extension-language .foo bar"),
4188 set_ext_lang_command
,
4190 &setlist
, &showlist
);
4192 add_info ("extensions", info_ext_lang_command
,
4193 _("All filename extensions associated with a source language."));
4195 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4196 &debug_file_directory
, _("\
4197 Set the directory where separate debug symbols are searched for."), _("\
4198 Show the directory where separate debug symbols are searched for."), _("\
4199 Separate debug symbols are first searched for in the same\n\
4200 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4201 and lastly at the path of the directory of the binary with\n\
4202 the global debug-file directory prepended."),
4204 show_debug_file_directory
,
4205 &setlist
, &showlist
);
4207 add_setshow_boolean_cmd ("symbol-loading", no_class
,
4208 &print_symbol_loading
, _("\
4209 Set printing of symbol loading messages."), _("\
4210 Show printing of symbol loading messages."), NULL
,
4213 &setprintlist
, &showprintlist
);