1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
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 2 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, write to the Free Software
23 Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 Boston, MA 02110-1301, USA. */
38 #include "breakpoint.h"
40 #include "complaints.h"
42 #include "inferior.h" /* for write_pc */
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"
55 #include <sys/types.h>
57 #include "gdb_string.h"
67 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
68 void (*deprecated_show_load_progress
) (const char *section
,
69 unsigned long section_sent
,
70 unsigned long section_size
,
71 unsigned long total_sent
,
72 unsigned long total_size
);
73 void (*deprecated_pre_add_symbol_hook
) (const char *);
74 void (*deprecated_post_add_symbol_hook
) (void);
75 void (*deprecated_target_new_objfile_hook
) (struct objfile
*);
77 static void clear_symtab_users_cleanup (void *ignore
);
79 /* Global variables owned by this file */
80 int readnow_symbol_files
; /* Read full symbols immediately */
82 /* External variables and functions referenced. */
84 extern void report_transfer_performance (unsigned long, time_t, time_t);
86 /* Functions this file defines */
89 static int simple_read_overlay_region_table (void);
90 static void simple_free_overlay_region_table (void);
93 static void set_initial_language (void);
95 static void load_command (char *, int);
97 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
99 static void add_symbol_file_command (char *, int);
101 static void add_shared_symbol_files_command (char *, int);
103 static void reread_separate_symbols (struct objfile
*objfile
);
105 static void cashier_psymtab (struct partial_symtab
*);
107 bfd
*symfile_bfd_open (char *);
109 int get_section_index (struct objfile
*, char *);
111 static void find_sym_fns (struct objfile
*);
113 static void decrement_reading_symtab (void *);
115 static void overlay_invalidate_all (void);
117 static int overlay_is_mapped (struct obj_section
*);
119 void list_overlays_command (char *, int);
121 void map_overlay_command (char *, int);
123 void unmap_overlay_command (char *, int);
125 static void overlay_auto_command (char *, int);
127 static void overlay_manual_command (char *, int);
129 static void overlay_off_command (char *, int);
131 static void overlay_load_command (char *, int);
133 static void overlay_command (char *, int);
135 static void simple_free_overlay_table (void);
137 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
139 static int simple_read_overlay_table (void);
141 static int simple_overlay_update_1 (struct obj_section
*);
143 static void add_filename_language (char *ext
, enum language lang
);
145 static void info_ext_lang_command (char *args
, int from_tty
);
147 static char *find_separate_debug_file (struct objfile
*objfile
);
149 static void init_filename_language_table (void);
151 void _initialize_symfile (void);
153 /* List of all available sym_fns. On gdb startup, each object file reader
154 calls add_symtab_fns() to register information on each format it is
157 static struct sym_fns
*symtab_fns
= NULL
;
159 /* Flag for whether user will be reloading symbols multiple times.
160 Defaults to ON for VxWorks, otherwise OFF. */
162 #ifdef SYMBOL_RELOADING_DEFAULT
163 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
165 int symbol_reloading
= 0;
168 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
169 struct cmd_list_element
*c
, const char *value
)
171 fprintf_filtered (file
, _("\
172 Dynamic symbol table reloading multiple times in one run is %s.\n"),
177 /* If non-zero, shared library symbols will be added automatically
178 when the inferior is created, new libraries are loaded, or when
179 attaching to the inferior. This is almost always what users will
180 want to have happen; but for very large programs, the startup time
181 will be excessive, and so if this is a problem, the user can clear
182 this flag and then add the shared library symbols as needed. Note
183 that there is a potential for confusion, since if the shared
184 library symbols are not loaded, commands like "info fun" will *not*
185 report all the functions that are actually present. */
187 int auto_solib_add
= 1;
189 /* For systems that support it, a threshold size in megabytes. If
190 automatically adding a new library's symbol table to those already
191 known to the debugger would cause the total shared library symbol
192 size to exceed this threshhold, then the shlib's symbols are not
193 added. The threshold is ignored if the user explicitly asks for a
194 shlib to be added, such as when using the "sharedlibrary"
197 int auto_solib_limit
;
200 /* This compares two partial symbols by names, using strcmp_iw_ordered
201 for the comparison. */
204 compare_psymbols (const void *s1p
, const void *s2p
)
206 struct partial_symbol
*const *s1
= s1p
;
207 struct partial_symbol
*const *s2
= s2p
;
209 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
210 SYMBOL_SEARCH_NAME (*s2
));
214 sort_pst_symbols (struct partial_symtab
*pst
)
216 /* Sort the global list; don't sort the static list */
218 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
219 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
223 /* Make a null terminated copy of the string at PTR with SIZE characters in
224 the obstack pointed to by OBSTACKP . Returns the address of the copy.
225 Note that the string at PTR does not have to be null terminated, I.E. it
226 may be part of a larger string and we are only saving a substring. */
229 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
231 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
232 /* Open-coded memcpy--saves function call time. These strings are usually
233 short. FIXME: Is this really still true with a compiler that can
236 const char *p1
= ptr
;
238 const char *end
= ptr
+ size
;
246 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
247 in the obstack pointed to by OBSTACKP. */
250 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
253 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
254 char *val
= (char *) obstack_alloc (obstackp
, len
);
261 /* True if we are nested inside psymtab_to_symtab. */
263 int currently_reading_symtab
= 0;
266 decrement_reading_symtab (void *dummy
)
268 currently_reading_symtab
--;
271 /* Get the symbol table that corresponds to a partial_symtab.
272 This is fast after the first time you do it. In fact, there
273 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
277 psymtab_to_symtab (struct partial_symtab
*pst
)
279 /* If it's been looked up before, return it. */
283 /* If it has not yet been read in, read it. */
286 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
287 currently_reading_symtab
++;
288 (*pst
->read_symtab
) (pst
);
289 do_cleanups (back_to
);
295 /* Remember the lowest-addressed loadable section we've seen.
296 This function is called via bfd_map_over_sections.
298 In case of equal vmas, the section with the largest size becomes the
299 lowest-addressed loadable section.
301 If the vmas and sizes are equal, the last section is considered the
302 lowest-addressed loadable section. */
305 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
307 asection
**lowest
= (asection
**) obj
;
309 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
312 *lowest
= sect
; /* First loadable section */
313 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
314 *lowest
= sect
; /* A lower loadable section */
315 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
316 && (bfd_section_size (abfd
, (*lowest
))
317 <= bfd_section_size (abfd
, sect
)))
321 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
323 struct section_addr_info
*
324 alloc_section_addr_info (size_t num_sections
)
326 struct section_addr_info
*sap
;
329 size
= (sizeof (struct section_addr_info
)
330 + sizeof (struct other_sections
) * (num_sections
- 1));
331 sap
= (struct section_addr_info
*) xmalloc (size
);
332 memset (sap
, 0, size
);
333 sap
->num_sections
= num_sections
;
339 /* Return a freshly allocated copy of ADDRS. The section names, if
340 any, are also freshly allocated copies of those in ADDRS. */
341 struct section_addr_info
*
342 copy_section_addr_info (struct section_addr_info
*addrs
)
344 struct section_addr_info
*copy
345 = alloc_section_addr_info (addrs
->num_sections
);
348 copy
->num_sections
= addrs
->num_sections
;
349 for (i
= 0; i
< addrs
->num_sections
; i
++)
351 copy
->other
[i
].addr
= addrs
->other
[i
].addr
;
352 if (addrs
->other
[i
].name
)
353 copy
->other
[i
].name
= xstrdup (addrs
->other
[i
].name
);
355 copy
->other
[i
].name
= NULL
;
356 copy
->other
[i
].sectindex
= addrs
->other
[i
].sectindex
;
364 /* Build (allocate and populate) a section_addr_info struct from
365 an existing section table. */
367 extern struct section_addr_info
*
368 build_section_addr_info_from_section_table (const struct section_table
*start
,
369 const struct section_table
*end
)
371 struct section_addr_info
*sap
;
372 const struct section_table
*stp
;
375 sap
= alloc_section_addr_info (end
- start
);
377 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
379 if (bfd_get_section_flags (stp
->bfd
,
380 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
381 && oidx
< end
- start
)
383 sap
->other
[oidx
].addr
= stp
->addr
;
384 sap
->other
[oidx
].name
385 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
386 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
395 /* Free all memory allocated by build_section_addr_info_from_section_table. */
398 free_section_addr_info (struct section_addr_info
*sap
)
402 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
403 if (sap
->other
[idx
].name
)
404 xfree (sap
->other
[idx
].name
);
409 /* Initialize OBJFILE's sect_index_* members. */
411 init_objfile_sect_indices (struct objfile
*objfile
)
416 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
418 objfile
->sect_index_text
= sect
->index
;
420 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
422 objfile
->sect_index_data
= sect
->index
;
424 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
426 objfile
->sect_index_bss
= sect
->index
;
428 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
430 objfile
->sect_index_rodata
= sect
->index
;
432 /* This is where things get really weird... We MUST have valid
433 indices for the various sect_index_* members or gdb will abort.
434 So if for example, there is no ".text" section, we have to
435 accomodate that. Except when explicitly adding symbol files at
436 some address, section_offsets contains nothing but zeros, so it
437 doesn't matter which slot in section_offsets the individual
438 sect_index_* members index into. So if they are all zero, it is
439 safe to just point all the currently uninitialized indices to the
442 for (i
= 0; i
< objfile
->num_sections
; i
++)
444 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
449 if (i
== objfile
->num_sections
)
451 if (objfile
->sect_index_text
== -1)
452 objfile
->sect_index_text
= 0;
453 if (objfile
->sect_index_data
== -1)
454 objfile
->sect_index_data
= 0;
455 if (objfile
->sect_index_bss
== -1)
456 objfile
->sect_index_bss
= 0;
457 if (objfile
->sect_index_rodata
== -1)
458 objfile
->sect_index_rodata
= 0;
462 /* The arguments to place_section. */
464 struct place_section_arg
466 struct section_offsets
*offsets
;
470 /* Find a unique offset to use for loadable section SECT if
471 the user did not provide an offset. */
474 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
476 struct place_section_arg
*arg
= obj
;
477 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
480 /* We are only interested in loadable sections. */
481 if ((bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
) == 0)
484 /* If the user specified an offset, honor it. */
485 if (offsets
[sect
->index
] != 0)
488 /* Otherwise, let's try to find a place for the section. */
491 ULONGEST align
= 1 << bfd_get_section_alignment (abfd
, sect
);
493 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
496 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
498 int indx
= cur_sec
->index
;
499 CORE_ADDR cur_offset
;
501 /* We don't need to compare against ourself. */
505 /* We can only conflict with loadable sections. */
506 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_LOAD
) == 0)
509 /* We do not expect this to happen; just ignore sections in a
510 relocatable file with an assigned VMA. */
511 if (bfd_section_vma (abfd
, cur_sec
) != 0)
514 /* If the section offset is 0, either the section has not been placed
515 yet, or it was the lowest section placed (in which case LOWEST
516 will be past its end). */
517 if (offsets
[indx
] == 0)
520 /* If this section would overlap us, then we must move up. */
521 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
522 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
524 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
525 start_addr
= (start_addr
+ align
- 1) & -align
;
530 /* Otherwise, we appear to be OK. So far. */
535 offsets
[sect
->index
] = start_addr
;
536 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
538 exec_set_section_address (bfd_get_filename (abfd
), sect
->index
, start_addr
);
541 /* Parse the user's idea of an offset for dynamic linking, into our idea
542 of how to represent it for fast symbol reading. This is the default
543 version of the sym_fns.sym_offsets function for symbol readers that
544 don't need to do anything special. It allocates a section_offsets table
545 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
548 default_symfile_offsets (struct objfile
*objfile
,
549 struct section_addr_info
*addrs
)
553 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
554 objfile
->section_offsets
= (struct section_offsets
*)
555 obstack_alloc (&objfile
->objfile_obstack
,
556 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
557 memset (objfile
->section_offsets
, 0,
558 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
560 /* Now calculate offsets for section that were specified by the
562 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
564 struct other_sections
*osp
;
566 osp
= &addrs
->other
[i
] ;
570 /* Record all sections in offsets */
571 /* The section_offsets in the objfile are here filled in using
573 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
576 /* For relocatable files, all loadable sections will start at zero.
577 The zero is meaningless, so try to pick arbitrary addresses such
578 that no loadable sections overlap. This algorithm is quadratic,
579 but the number of sections in a single object file is generally
581 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
583 struct place_section_arg arg
;
584 arg
.offsets
= objfile
->section_offsets
;
586 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
589 /* Remember the bfd indexes for the .text, .data, .bss and
591 init_objfile_sect_indices (objfile
);
595 /* Process a symbol file, as either the main file or as a dynamically
598 OBJFILE is where the symbols are to be read from.
600 ADDRS is the list of section load addresses. If the user has given
601 an 'add-symbol-file' command, then this is the list of offsets and
602 addresses he or she provided as arguments to the command; or, if
603 we're handling a shared library, these are the actual addresses the
604 sections are loaded at, according to the inferior's dynamic linker
605 (as gleaned by GDB's shared library code). We convert each address
606 into an offset from the section VMA's as it appears in the object
607 file, and then call the file's sym_offsets function to convert this
608 into a format-specific offset table --- a `struct section_offsets'.
609 If ADDRS is non-zero, OFFSETS must be zero.
611 OFFSETS is a table of section offsets already in the right
612 format-specific representation. NUM_OFFSETS is the number of
613 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
614 assume this is the proper table the call to sym_offsets described
615 above would produce. Instead of calling sym_offsets, we just dump
616 it right into objfile->section_offsets. (When we're re-reading
617 symbols from an objfile, we don't have the original load address
618 list any more; all we have is the section offset table.) If
619 OFFSETS is non-zero, ADDRS must be zero.
621 MAINLINE is nonzero if this is the main symbol file, or zero if
622 it's an extra symbol file such as dynamically loaded code.
624 VERBO is nonzero if the caller has printed a verbose message about
625 the symbol reading (and complaints can be more terse about it). */
628 syms_from_objfile (struct objfile
*objfile
,
629 struct section_addr_info
*addrs
,
630 struct section_offsets
*offsets
,
635 struct section_addr_info
*local_addr
= NULL
;
636 struct cleanup
*old_chain
;
638 gdb_assert (! (addrs
&& offsets
));
640 init_entry_point_info (objfile
);
641 find_sym_fns (objfile
);
643 if (objfile
->sf
== NULL
)
644 return; /* No symbols. */
646 /* Make sure that partially constructed symbol tables will be cleaned up
647 if an error occurs during symbol reading. */
648 old_chain
= make_cleanup_free_objfile (objfile
);
650 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
651 list. We now establish the convention that an addr of zero means
652 no load address was specified. */
653 if (! addrs
&& ! offsets
)
656 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
657 make_cleanup (xfree
, local_addr
);
661 /* Now either addrs or offsets is non-zero. */
665 /* We will modify the main symbol table, make sure that all its users
666 will be cleaned up if an error occurs during symbol reading. */
667 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
669 /* Since no error yet, throw away the old symbol table. */
671 if (symfile_objfile
!= NULL
)
673 free_objfile (symfile_objfile
);
674 symfile_objfile
= NULL
;
677 /* Currently we keep symbols from the add-symbol-file command.
678 If the user wants to get rid of them, they should do "symbol-file"
679 without arguments first. Not sure this is the best behavior
682 (*objfile
->sf
->sym_new_init
) (objfile
);
685 /* Convert addr into an offset rather than an absolute address.
686 We find the lowest address of a loaded segment in the objfile,
687 and assume that <addr> is where that got loaded.
689 We no longer warn if the lowest section is not a text segment (as
690 happens for the PA64 port. */
691 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
693 asection
*lower_sect
;
695 CORE_ADDR lower_offset
;
698 /* Find lowest loadable section to be used as starting point for
699 continguous sections. FIXME!! won't work without call to find
700 .text first, but this assumes text is lowest section. */
701 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
702 if (lower_sect
== NULL
)
703 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
705 if (lower_sect
== NULL
)
706 warning (_("no loadable sections found in added symbol-file %s"),
709 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
710 warning (_("Lowest section in %s is %s at %s"),
712 bfd_section_name (objfile
->obfd
, lower_sect
),
713 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
714 if (lower_sect
!= NULL
)
715 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
719 /* Calculate offsets for the loadable sections.
720 FIXME! Sections must be in order of increasing loadable section
721 so that contiguous sections can use the lower-offset!!!
723 Adjust offsets if the segments are not contiguous.
724 If the section is contiguous, its offset should be set to
725 the offset of the highest loadable section lower than it
726 (the loadable section directly below it in memory).
727 this_offset = lower_offset = lower_addr - lower_orig_addr */
729 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
731 if (addrs
->other
[i
].addr
!= 0)
733 sect
= bfd_get_section_by_name (objfile
->obfd
,
734 addrs
->other
[i
].name
);
738 -= bfd_section_vma (objfile
->obfd
, sect
);
739 lower_offset
= addrs
->other
[i
].addr
;
740 /* This is the index used by BFD. */
741 addrs
->other
[i
].sectindex
= sect
->index
;
745 warning (_("section %s not found in %s"),
746 addrs
->other
[i
].name
,
748 addrs
->other
[i
].addr
= 0;
752 addrs
->other
[i
].addr
= lower_offset
;
756 /* Initialize symbol reading routines for this objfile, allow complaints to
757 appear for this new file, and record how verbose to be, then do the
758 initial symbol reading for this file. */
760 (*objfile
->sf
->sym_init
) (objfile
);
761 clear_complaints (&symfile_complaints
, 1, verbo
);
764 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
767 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
769 /* Just copy in the offset table directly as given to us. */
770 objfile
->num_sections
= num_offsets
;
771 objfile
->section_offsets
772 = ((struct section_offsets
*)
773 obstack_alloc (&objfile
->objfile_obstack
, size
));
774 memcpy (objfile
->section_offsets
, offsets
, size
);
776 init_objfile_sect_indices (objfile
);
779 #ifndef DEPRECATED_IBM6000_TARGET
780 /* This is a SVR4/SunOS specific hack, I think. In any event, it
781 screws RS/6000. sym_offsets should be doing this sort of thing,
782 because it knows the mapping between bfd sections and
784 /* This is a hack. As far as I can tell, section offsets are not
785 target dependent. They are all set to addr with a couple of
786 exceptions. The exceptions are sysvr4 shared libraries, whose
787 offsets are kept in solib structures anyway and rs6000 xcoff
788 which handles shared libraries in a completely unique way.
790 Section offsets are built similarly, except that they are built
791 by adding addr in all cases because there is no clear mapping
792 from section_offsets into actual sections. Note that solib.c
793 has a different algorithm for finding section offsets.
795 These should probably all be collapsed into some target
796 independent form of shared library support. FIXME. */
800 struct obj_section
*s
;
802 /* Map section offsets in "addr" back to the object's
803 sections by comparing the section names with bfd's
804 section names. Then adjust the section address by
805 the offset. */ /* for gdb/13815 */
807 ALL_OBJFILE_OSECTIONS (objfile
, s
)
809 CORE_ADDR s_addr
= 0;
813 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
815 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
817 addrs
->other
[i
].name
) == 0)
818 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
820 s
->addr
-= s
->offset
;
822 s
->endaddr
-= s
->offset
;
823 s
->endaddr
+= s_addr
;
827 #endif /* not DEPRECATED_IBM6000_TARGET */
829 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
831 /* Don't allow char * to have a typename (else would get caddr_t).
832 Ditto void *. FIXME: Check whether this is now done by all the
833 symbol readers themselves (many of them now do), and if so remove
836 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
837 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
839 /* Mark the objfile has having had initial symbol read attempted. Note
840 that this does not mean we found any symbols... */
842 objfile
->flags
|= OBJF_SYMS
;
844 /* Discard cleanups as symbol reading was successful. */
846 discard_cleanups (old_chain
);
849 /* Perform required actions after either reading in the initial
850 symbols for a new objfile, or mapping in the symbols from a reusable
854 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
857 /* If this is the main symbol file we have to clean up all users of the
858 old main symbol file. Otherwise it is sufficient to fixup all the
859 breakpoints that may have been redefined by this symbol file. */
862 /* OK, make it the "real" symbol file. */
863 symfile_objfile
= objfile
;
865 clear_symtab_users ();
869 breakpoint_re_set ();
872 /* We're done reading the symbol file; finish off complaints. */
873 clear_complaints (&symfile_complaints
, 0, verbo
);
876 /* Process a symbol file, as either the main file or as a dynamically
879 ABFD is a BFD already open on the file, as from symfile_bfd_open.
880 This BFD will be closed on error, and is always consumed by this function.
882 FROM_TTY says how verbose to be.
884 MAINLINE specifies whether this is the main symbol file, or whether
885 it's an extra symbol file such as dynamically loaded code.
887 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
888 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
891 Upon success, returns a pointer to the objfile that was added.
892 Upon failure, jumps back to command level (never returns). */
893 static struct objfile
*
894 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
, int from_tty
,
895 struct section_addr_info
*addrs
,
896 struct section_offsets
*offsets
,
898 int mainline
, int flags
)
900 struct objfile
*objfile
;
901 struct partial_symtab
*psymtab
;
903 struct section_addr_info
*orig_addrs
= NULL
;
904 struct cleanup
*my_cleanups
;
905 const char *name
= bfd_get_filename (abfd
);
907 my_cleanups
= make_cleanup_bfd_close (abfd
);
909 /* Give user a chance to burp if we'd be
910 interactively wiping out any existing symbols. */
912 if ((have_full_symbols () || have_partial_symbols ())
915 && !query ("Load new symbol table from \"%s\"? ", name
))
916 error (_("Not confirmed."));
918 objfile
= allocate_objfile (abfd
, flags
);
919 discard_cleanups (my_cleanups
);
923 orig_addrs
= copy_section_addr_info (addrs
);
924 make_cleanup_free_section_addr_info (orig_addrs
);
927 /* We either created a new mapped symbol table, mapped an existing
928 symbol table file which has not had initial symbol reading
929 performed, or need to read an unmapped symbol table. */
930 if (from_tty
|| info_verbose
)
932 if (deprecated_pre_add_symbol_hook
)
933 deprecated_pre_add_symbol_hook (name
);
936 printf_unfiltered (_("Reading symbols from %s..."), name
);
938 gdb_flush (gdb_stdout
);
941 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
944 /* We now have at least a partial symbol table. Check to see if the
945 user requested that all symbols be read on initial access via either
946 the gdb startup command line or on a per symbol file basis. Expand
947 all partial symbol tables for this objfile if so. */
949 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
951 if (from_tty
|| info_verbose
)
953 printf_unfiltered (_("expanding to full symbols..."));
955 gdb_flush (gdb_stdout
);
958 for (psymtab
= objfile
->psymtabs
;
960 psymtab
= psymtab
->next
)
962 psymtab_to_symtab (psymtab
);
966 debugfile
= find_separate_debug_file (objfile
);
971 objfile
->separate_debug_objfile
972 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
976 objfile
->separate_debug_objfile
977 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
979 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
982 /* Put the separate debug object before the normal one, this is so that
983 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
984 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
989 if (!have_partial_symbols () && !have_full_symbols ())
992 printf_filtered (_("(no debugging symbols found)"));
993 if (from_tty
|| info_verbose
)
994 printf_filtered ("...");
996 printf_filtered ("\n");
1000 if (from_tty
|| info_verbose
)
1002 if (deprecated_post_add_symbol_hook
)
1003 deprecated_post_add_symbol_hook ();
1006 printf_unfiltered (_("done.\n"));
1010 /* We print some messages regardless of whether 'from_tty ||
1011 info_verbose' is true, so make sure they go out at the right
1013 gdb_flush (gdb_stdout
);
1015 do_cleanups (my_cleanups
);
1017 if (objfile
->sf
== NULL
)
1018 return objfile
; /* No symbols. */
1020 new_symfile_objfile (objfile
, mainline
, from_tty
);
1022 if (deprecated_target_new_objfile_hook
)
1023 deprecated_target_new_objfile_hook (objfile
);
1025 bfd_cache_close_all ();
1030 /* Process the symbol file ABFD, as either the main file or as a
1031 dynamically loaded file.
1033 See symbol_file_add_with_addrs_or_offsets's comments for
1036 symbol_file_add_from_bfd (bfd
*abfd
, int from_tty
,
1037 struct section_addr_info
*addrs
,
1038 int mainline
, int flags
)
1040 return symbol_file_add_with_addrs_or_offsets (abfd
,
1041 from_tty
, addrs
, 0, 0,
1046 /* Process a symbol file, as either the main file or as a dynamically
1047 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1050 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
1051 int mainline
, int flags
)
1053 return symbol_file_add_from_bfd (symfile_bfd_open (name
), from_tty
,
1054 addrs
, mainline
, flags
);
1058 /* Call symbol_file_add() with default values and update whatever is
1059 affected by the loading of a new main().
1060 Used when the file is supplied in the gdb command line
1061 and by some targets with special loading requirements.
1062 The auxiliary function, symbol_file_add_main_1(), has the flags
1063 argument for the switches that can only be specified in the symbol_file
1067 symbol_file_add_main (char *args
, int from_tty
)
1069 symbol_file_add_main_1 (args
, from_tty
, 0);
1073 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1075 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1077 /* Getting new symbols may change our opinion about
1078 what is frameless. */
1079 reinit_frame_cache ();
1081 set_initial_language ();
1085 symbol_file_clear (int from_tty
)
1087 if ((have_full_symbols () || have_partial_symbols ())
1090 ? !query (_("Discard symbol table from `%s'? "),
1091 symfile_objfile
->name
)
1092 : !query (_("Discard symbol table? "))))
1093 error (_("Not confirmed."));
1094 free_all_objfiles ();
1096 /* solib descriptors may have handles to objfiles. Since their
1097 storage has just been released, we'd better wipe the solib
1098 descriptors as well.
1100 #if defined(SOLIB_RESTART)
1104 symfile_objfile
= NULL
;
1106 printf_unfiltered (_("No symbol file now.\n"));
1110 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1113 bfd_size_type debuglink_size
;
1114 unsigned long crc32
;
1119 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1124 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1126 contents
= xmalloc (debuglink_size
);
1127 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1128 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1130 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1131 crc_offset
= strlen (contents
) + 1;
1132 crc_offset
= (crc_offset
+ 3) & ~3;
1134 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1141 separate_debug_file_exists (const char *name
, unsigned long crc
)
1143 unsigned long file_crc
= 0;
1145 gdb_byte buffer
[8*1024];
1148 fd
= open (name
, O_RDONLY
| O_BINARY
);
1152 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1153 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1157 return crc
== file_crc
;
1160 static char *debug_file_directory
= NULL
;
1162 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1163 struct cmd_list_element
*c
, const char *value
)
1165 fprintf_filtered (file
, _("\
1166 The directory where separate debug symbols are searched for is \"%s\".\n"),
1170 #if ! defined (DEBUG_SUBDIRECTORY)
1171 #define DEBUG_SUBDIRECTORY ".debug"
1175 find_separate_debug_file (struct objfile
*objfile
)
1182 bfd_size_type debuglink_size
;
1183 unsigned long crc32
;
1186 basename
= get_debug_link_info (objfile
, &crc32
);
1188 if (basename
== NULL
)
1191 dir
= xstrdup (objfile
->name
);
1193 /* Strip off the final filename part, leaving the directory name,
1194 followed by a slash. Objfile names should always be absolute and
1195 tilde-expanded, so there should always be a slash in there
1197 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1199 if (IS_DIR_SEPARATOR (dir
[i
]))
1202 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1205 debugfile
= alloca (strlen (debug_file_directory
) + 1
1207 + strlen (DEBUG_SUBDIRECTORY
)
1212 /* First try in the same directory as the original file. */
1213 strcpy (debugfile
, dir
);
1214 strcat (debugfile
, basename
);
1216 if (separate_debug_file_exists (debugfile
, crc32
))
1220 return xstrdup (debugfile
);
1223 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1224 strcpy (debugfile
, dir
);
1225 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1226 strcat (debugfile
, "/");
1227 strcat (debugfile
, basename
);
1229 if (separate_debug_file_exists (debugfile
, crc32
))
1233 return xstrdup (debugfile
);
1236 /* Then try in the global debugfile directory. */
1237 strcpy (debugfile
, debug_file_directory
);
1238 strcat (debugfile
, "/");
1239 strcat (debugfile
, dir
);
1240 strcat (debugfile
, basename
);
1242 if (separate_debug_file_exists (debugfile
, crc32
))
1246 return xstrdup (debugfile
);
1255 /* This is the symbol-file command. Read the file, analyze its
1256 symbols, and add a struct symtab to a symtab list. The syntax of
1257 the command is rather bizarre:
1259 1. The function buildargv implements various quoting conventions
1260 which are undocumented and have little or nothing in common with
1261 the way things are quoted (or not quoted) elsewhere in GDB.
1263 2. Options are used, which are not generally used in GDB (perhaps
1264 "set mapped on", "set readnow on" would be better)
1266 3. The order of options matters, which is contrary to GNU
1267 conventions (because it is confusing and inconvenient). */
1270 symbol_file_command (char *args
, int from_tty
)
1276 symbol_file_clear (from_tty
);
1280 char **argv
= buildargv (args
);
1281 int flags
= OBJF_USERLOADED
;
1282 struct cleanup
*cleanups
;
1288 cleanups
= make_cleanup_freeargv (argv
);
1289 while (*argv
!= NULL
)
1291 if (strcmp (*argv
, "-readnow") == 0)
1292 flags
|= OBJF_READNOW
;
1293 else if (**argv
== '-')
1294 error (_("unknown option `%s'"), *argv
);
1297 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1305 error (_("no symbol file name was specified"));
1307 do_cleanups (cleanups
);
1311 /* Set the initial language.
1313 FIXME: A better solution would be to record the language in the
1314 psymtab when reading partial symbols, and then use it (if known) to
1315 set the language. This would be a win for formats that encode the
1316 language in an easily discoverable place, such as DWARF. For
1317 stabs, we can jump through hoops looking for specially named
1318 symbols or try to intuit the language from the specific type of
1319 stabs we find, but we can't do that until later when we read in
1323 set_initial_language (void)
1325 struct partial_symtab
*pst
;
1326 enum language lang
= language_unknown
;
1328 pst
= find_main_psymtab ();
1331 if (pst
->filename
!= NULL
)
1332 lang
= deduce_language_from_filename (pst
->filename
);
1334 if (lang
== language_unknown
)
1336 /* Make C the default language */
1340 set_language (lang
);
1341 expected_language
= current_language
; /* Don't warn the user. */
1345 /* Open the file specified by NAME and hand it off to BFD for
1346 preliminary analysis. Return a newly initialized bfd *, which
1347 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1348 absolute). In case of trouble, error() is called. */
1351 symfile_bfd_open (char *name
)
1355 char *absolute_name
;
1357 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1359 /* Look down path for it, allocate 2nd new malloc'd copy. */
1360 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1361 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1362 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1365 char *exename
= alloca (strlen (name
) + 5);
1366 strcat (strcpy (exename
, name
), ".exe");
1367 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1368 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1373 make_cleanup (xfree
, name
);
1374 perror_with_name (name
);
1377 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1378 bfd. It'll be freed in free_objfile(). */
1380 name
= absolute_name
;
1382 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1386 make_cleanup (xfree
, name
);
1387 error (_("\"%s\": can't open to read symbols: %s."), name
,
1388 bfd_errmsg (bfd_get_error ()));
1390 bfd_set_cacheable (sym_bfd
, 1);
1392 if (!bfd_check_format (sym_bfd
, bfd_object
))
1394 /* FIXME: should be checking for errors from bfd_close (for one
1395 thing, on error it does not free all the storage associated
1397 bfd_close (sym_bfd
); /* This also closes desc. */
1398 make_cleanup (xfree
, name
);
1399 error (_("\"%s\": can't read symbols: %s."), name
,
1400 bfd_errmsg (bfd_get_error ()));
1406 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1407 the section was not found. */
1410 get_section_index (struct objfile
*objfile
, char *section_name
)
1412 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1420 /* Link SF into the global symtab_fns list. Called on startup by the
1421 _initialize routine in each object file format reader, to register
1422 information about each format the the reader is prepared to
1426 add_symtab_fns (struct sym_fns
*sf
)
1428 sf
->next
= symtab_fns
;
1432 /* Initialize OBJFILE to read symbols from its associated BFD. It
1433 either returns or calls error(). The result is an initialized
1434 struct sym_fns in the objfile structure, that contains cached
1435 information about the symbol file. */
1438 find_sym_fns (struct objfile
*objfile
)
1441 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1442 char *our_target
= bfd_get_target (objfile
->obfd
);
1444 if (our_flavour
== bfd_target_srec_flavour
1445 || our_flavour
== bfd_target_ihex_flavour
1446 || our_flavour
== bfd_target_tekhex_flavour
)
1447 return; /* No symbols. */
1449 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1451 if (our_flavour
== sf
->sym_flavour
)
1458 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1459 bfd_get_target (objfile
->obfd
));
1463 /* This function runs the load command of our current target. */
1466 load_command (char *arg
, int from_tty
)
1469 arg
= get_exec_file (1);
1470 target_load (arg
, from_tty
);
1472 /* After re-loading the executable, we don't really know which
1473 overlays are mapped any more. */
1474 overlay_cache_invalid
= 1;
1477 /* This version of "load" should be usable for any target. Currently
1478 it is just used for remote targets, not inftarg.c or core files,
1479 on the theory that only in that case is it useful.
1481 Avoiding xmodem and the like seems like a win (a) because we don't have
1482 to worry about finding it, and (b) On VMS, fork() is very slow and so
1483 we don't want to run a subprocess. On the other hand, I'm not sure how
1484 performance compares. */
1486 static int download_write_size
= 512;
1488 show_download_write_size (struct ui_file
*file
, int from_tty
,
1489 struct cmd_list_element
*c
, const char *value
)
1491 fprintf_filtered (file
, _("\
1492 The write size used when downloading a program is %s.\n"),
1495 static int validate_download
= 0;
1497 /* Callback service function for generic_load (bfd_map_over_sections). */
1500 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1502 bfd_size_type
*sum
= data
;
1504 *sum
+= bfd_get_section_size (asec
);
1507 /* Opaque data for load_section_callback. */
1508 struct load_section_data
{
1509 unsigned long load_offset
;
1510 unsigned long write_count
;
1511 unsigned long data_count
;
1512 bfd_size_type total_size
;
1515 /* Callback service function for generic_load (bfd_map_over_sections). */
1518 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1520 struct load_section_data
*args
= data
;
1522 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1524 bfd_size_type size
= bfd_get_section_size (asec
);
1528 struct cleanup
*old_chain
;
1529 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1530 bfd_size_type block_size
;
1532 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1535 if (download_write_size
> 0 && size
> download_write_size
)
1536 block_size
= download_write_size
;
1540 buffer
= xmalloc (size
);
1541 old_chain
= make_cleanup (xfree
, buffer
);
1543 /* Is this really necessary? I guess it gives the user something
1544 to look at during a long download. */
1545 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1546 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1548 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1554 bfd_size_type this_transfer
= size
- sent
;
1556 if (this_transfer
>= block_size
)
1557 this_transfer
= block_size
;
1558 len
= target_write_memory_partial (lma
, buffer
,
1559 this_transfer
, &err
);
1562 if (validate_download
)
1564 /* Broken memories and broken monitors manifest
1565 themselves here when bring new computers to
1566 life. This doubles already slow downloads. */
1567 /* NOTE: cagney/1999-10-18: A more efficient
1568 implementation might add a verify_memory()
1569 method to the target vector and then use
1570 that. remote.c could implement that method
1571 using the ``qCRC'' packet. */
1572 gdb_byte
*check
= xmalloc (len
);
1573 struct cleanup
*verify_cleanups
=
1574 make_cleanup (xfree
, check
);
1576 if (target_read_memory (lma
, check
, len
) != 0)
1577 error (_("Download verify read failed at 0x%s"),
1579 if (memcmp (buffer
, check
, len
) != 0)
1580 error (_("Download verify compare failed at 0x%s"),
1582 do_cleanups (verify_cleanups
);
1584 args
->data_count
+= len
;
1587 args
->write_count
+= 1;
1590 || (deprecated_ui_load_progress_hook
!= NULL
1591 && deprecated_ui_load_progress_hook (sect_name
, sent
)))
1592 error (_("Canceled the download"));
1594 if (deprecated_show_load_progress
!= NULL
)
1595 deprecated_show_load_progress (sect_name
, sent
, size
,
1599 while (sent
< size
);
1602 error (_("Memory access error while loading section %s."), sect_name
);
1604 do_cleanups (old_chain
);
1610 generic_load (char *args
, int from_tty
)
1614 struct timeval start_time
, end_time
;
1616 struct cleanup
*old_cleanups
;
1618 struct load_section_data cbdata
;
1621 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1622 cbdata
.write_count
= 0; /* Number of writes needed. */
1623 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1624 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1626 /* Parse the input argument - the user can specify a load offset as
1627 a second argument. */
1628 filename
= xmalloc (strlen (args
) + 1);
1629 old_cleanups
= make_cleanup (xfree
, filename
);
1630 strcpy (filename
, args
);
1631 offptr
= strchr (filename
, ' ');
1636 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1637 if (offptr
== endptr
)
1638 error (_("Invalid download offset:%s."), offptr
);
1642 cbdata
.load_offset
= 0;
1644 /* Open the file for loading. */
1645 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1646 if (loadfile_bfd
== NULL
)
1648 perror_with_name (filename
);
1652 /* FIXME: should be checking for errors from bfd_close (for one thing,
1653 on error it does not free all the storage associated with the
1655 make_cleanup_bfd_close (loadfile_bfd
);
1657 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1659 error (_("\"%s\" is not an object file: %s"), filename
,
1660 bfd_errmsg (bfd_get_error ()));
1663 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1664 (void *) &cbdata
.total_size
);
1666 gettimeofday (&start_time
, NULL
);
1668 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1670 gettimeofday (&end_time
, NULL
);
1672 entry
= bfd_get_start_address (loadfile_bfd
);
1673 ui_out_text (uiout
, "Start address ");
1674 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1675 ui_out_text (uiout
, ", load size ");
1676 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1677 ui_out_text (uiout
, "\n");
1678 /* We were doing this in remote-mips.c, I suspect it is right
1679 for other targets too. */
1682 /* FIXME: are we supposed to call symbol_file_add or not? According
1683 to a comment from remote-mips.c (where a call to symbol_file_add
1684 was commented out), making the call confuses GDB if more than one
1685 file is loaded in. Some targets do (e.g., remote-vx.c) but
1686 others don't (or didn't - perhaps they have all been deleted). */
1688 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1689 cbdata
.write_count
, &start_time
, &end_time
);
1691 do_cleanups (old_cleanups
);
1694 /* Report how fast the transfer went. */
1696 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1697 replaced by print_transfer_performance (with a very different
1698 function signature). */
1701 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1704 struct timeval start
, end
;
1706 start
.tv_sec
= start_time
;
1708 end
.tv_sec
= end_time
;
1711 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
1715 print_transfer_performance (struct ui_file
*stream
,
1716 unsigned long data_count
,
1717 unsigned long write_count
,
1718 const struct timeval
*start_time
,
1719 const struct timeval
*end_time
)
1721 unsigned long time_count
;
1723 /* Compute the elapsed time in milliseconds, as a tradeoff between
1724 accuracy and overflow. */
1725 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
1726 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
1728 ui_out_text (uiout
, "Transfer rate: ");
1731 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1732 1000 * (data_count
* 8) / time_count
);
1733 ui_out_text (uiout
, " bits/sec");
1737 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1738 ui_out_text (uiout
, " bits in <1 sec");
1740 if (write_count
> 0)
1742 ui_out_text (uiout
, ", ");
1743 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1744 ui_out_text (uiout
, " bytes/write");
1746 ui_out_text (uiout
, ".\n");
1749 /* This function allows the addition of incrementally linked object files.
1750 It does not modify any state in the target, only in the debugger. */
1751 /* Note: ezannoni 2000-04-13 This function/command used to have a
1752 special case syntax for the rombug target (Rombug is the boot
1753 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1754 rombug case, the user doesn't need to supply a text address,
1755 instead a call to target_link() (in target.c) would supply the
1756 value to use. We are now discontinuing this type of ad hoc syntax. */
1759 add_symbol_file_command (char *args
, int from_tty
)
1761 char *filename
= NULL
;
1762 int flags
= OBJF_USERLOADED
;
1764 int expecting_option
= 0;
1765 int section_index
= 0;
1769 int expecting_sec_name
= 0;
1770 int expecting_sec_addr
= 0;
1778 struct section_addr_info
*section_addrs
;
1779 struct sect_opt
*sect_opts
= NULL
;
1780 size_t num_sect_opts
= 0;
1781 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1784 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1785 * sizeof (struct sect_opt
));
1790 error (_("add-symbol-file takes a file name and an address"));
1792 /* Make a copy of the string that we can safely write into. */
1793 args
= xstrdup (args
);
1795 while (*args
!= '\000')
1797 /* Any leading spaces? */
1798 while (isspace (*args
))
1801 /* Point arg to the beginning of the argument. */
1804 /* Move args pointer over the argument. */
1805 while ((*args
!= '\000') && !isspace (*args
))
1808 /* If there are more arguments, terminate arg and
1810 if (*args
!= '\000')
1813 /* Now process the argument. */
1816 /* The first argument is the file name. */
1817 filename
= tilde_expand (arg
);
1818 make_cleanup (xfree
, filename
);
1823 /* The second argument is always the text address at which
1824 to load the program. */
1825 sect_opts
[section_index
].name
= ".text";
1826 sect_opts
[section_index
].value
= arg
;
1827 if (++section_index
> num_sect_opts
)
1830 sect_opts
= ((struct sect_opt
*)
1831 xrealloc (sect_opts
,
1833 * sizeof (struct sect_opt
)));
1838 /* It's an option (starting with '-') or it's an argument
1843 if (strcmp (arg
, "-readnow") == 0)
1844 flags
|= OBJF_READNOW
;
1845 else if (strcmp (arg
, "-s") == 0)
1847 expecting_sec_name
= 1;
1848 expecting_sec_addr
= 1;
1853 if (expecting_sec_name
)
1855 sect_opts
[section_index
].name
= arg
;
1856 expecting_sec_name
= 0;
1859 if (expecting_sec_addr
)
1861 sect_opts
[section_index
].value
= arg
;
1862 expecting_sec_addr
= 0;
1863 if (++section_index
> num_sect_opts
)
1866 sect_opts
= ((struct sect_opt
*)
1867 xrealloc (sect_opts
,
1869 * sizeof (struct sect_opt
)));
1873 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
1879 /* Print the prompt for the query below. And save the arguments into
1880 a sect_addr_info structure to be passed around to other
1881 functions. We have to split this up into separate print
1882 statements because hex_string returns a local static
1885 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
1886 section_addrs
= alloc_section_addr_info (section_index
);
1887 make_cleanup (xfree
, section_addrs
);
1888 for (i
= 0; i
< section_index
; i
++)
1891 char *val
= sect_opts
[i
].value
;
1892 char *sec
= sect_opts
[i
].name
;
1894 addr
= parse_and_eval_address (val
);
1896 /* Here we store the section offsets in the order they were
1897 entered on the command line. */
1898 section_addrs
->other
[sec_num
].name
= sec
;
1899 section_addrs
->other
[sec_num
].addr
= addr
;
1900 printf_unfiltered ("\t%s_addr = %s\n",
1901 sec
, hex_string ((unsigned long)addr
));
1904 /* The object's sections are initialized when a
1905 call is made to build_objfile_section_table (objfile).
1906 This happens in reread_symbols.
1907 At this point, we don't know what file type this is,
1908 so we can't determine what section names are valid. */
1911 if (from_tty
&& (!query ("%s", "")))
1912 error (_("Not confirmed."));
1914 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
1916 /* Getting new symbols may change our opinion about what is
1918 reinit_frame_cache ();
1919 do_cleanups (my_cleanups
);
1923 add_shared_symbol_files_command (char *args
, int from_tty
)
1925 #ifdef ADD_SHARED_SYMBOL_FILES
1926 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1928 error (_("This command is not available in this configuration of GDB."));
1932 /* Re-read symbols if a symbol-file has changed. */
1934 reread_symbols (void)
1936 struct objfile
*objfile
;
1939 struct stat new_statbuf
;
1942 /* With the addition of shared libraries, this should be modified,
1943 the load time should be saved in the partial symbol tables, since
1944 different tables may come from different source files. FIXME.
1945 This routine should then walk down each partial symbol table
1946 and see if the symbol table that it originates from has been changed */
1948 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1952 #ifdef DEPRECATED_IBM6000_TARGET
1953 /* If this object is from a shared library, then you should
1954 stat on the library name, not member name. */
1956 if (objfile
->obfd
->my_archive
)
1957 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1960 res
= stat (objfile
->name
, &new_statbuf
);
1963 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1964 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
1968 new_modtime
= new_statbuf
.st_mtime
;
1969 if (new_modtime
!= objfile
->mtime
)
1971 struct cleanup
*old_cleanups
;
1972 struct section_offsets
*offsets
;
1974 char *obfd_filename
;
1976 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
1979 /* There are various functions like symbol_file_add,
1980 symfile_bfd_open, syms_from_objfile, etc., which might
1981 appear to do what we want. But they have various other
1982 effects which we *don't* want. So we just do stuff
1983 ourselves. We don't worry about mapped files (for one thing,
1984 any mapped file will be out of date). */
1986 /* If we get an error, blow away this objfile (not sure if
1987 that is the correct response for things like shared
1989 old_cleanups
= make_cleanup_free_objfile (objfile
);
1990 /* We need to do this whenever any symbols go away. */
1991 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1993 /* Clean up any state BFD has sitting around. We don't need
1994 to close the descriptor but BFD lacks a way of closing the
1995 BFD without closing the descriptor. */
1996 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1997 if (!bfd_close (objfile
->obfd
))
1998 error (_("Can't close BFD for %s: %s"), objfile
->name
,
1999 bfd_errmsg (bfd_get_error ()));
2000 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2001 if (objfile
->obfd
== NULL
)
2002 error (_("Can't open %s to read symbols."), objfile
->name
);
2003 /* bfd_openr sets cacheable to true, which is what we want. */
2004 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2005 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2006 bfd_errmsg (bfd_get_error ()));
2008 /* Save the offsets, we will nuke them with the rest of the
2010 num_offsets
= objfile
->num_sections
;
2011 offsets
= ((struct section_offsets
*)
2012 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2013 memcpy (offsets
, objfile
->section_offsets
,
2014 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2016 /* Remove any references to this objfile in the global
2018 preserve_values (objfile
);
2020 /* Nuke all the state that we will re-read. Much of the following
2021 code which sets things to NULL really is necessary to tell
2022 other parts of GDB that there is nothing currently there. */
2024 /* FIXME: Do we have to free a whole linked list, or is this
2026 if (objfile
->global_psymbols
.list
)
2027 xfree (objfile
->global_psymbols
.list
);
2028 memset (&objfile
->global_psymbols
, 0,
2029 sizeof (objfile
->global_psymbols
));
2030 if (objfile
->static_psymbols
.list
)
2031 xfree (objfile
->static_psymbols
.list
);
2032 memset (&objfile
->static_psymbols
, 0,
2033 sizeof (objfile
->static_psymbols
));
2035 /* Free the obstacks for non-reusable objfiles */
2036 bcache_xfree (objfile
->psymbol_cache
);
2037 objfile
->psymbol_cache
= bcache_xmalloc ();
2038 bcache_xfree (objfile
->macro_cache
);
2039 objfile
->macro_cache
= bcache_xmalloc ();
2040 if (objfile
->demangled_names_hash
!= NULL
)
2042 htab_delete (objfile
->demangled_names_hash
);
2043 objfile
->demangled_names_hash
= NULL
;
2045 obstack_free (&objfile
->objfile_obstack
, 0);
2046 objfile
->sections
= NULL
;
2047 objfile
->symtabs
= NULL
;
2048 objfile
->psymtabs
= NULL
;
2049 objfile
->free_psymtabs
= NULL
;
2050 objfile
->cp_namespace_symtab
= NULL
;
2051 objfile
->msymbols
= NULL
;
2052 objfile
->deprecated_sym_private
= NULL
;
2053 objfile
->minimal_symbol_count
= 0;
2054 memset (&objfile
->msymbol_hash
, 0,
2055 sizeof (objfile
->msymbol_hash
));
2056 memset (&objfile
->msymbol_demangled_hash
, 0,
2057 sizeof (objfile
->msymbol_demangled_hash
));
2058 objfile
->fundamental_types
= NULL
;
2059 clear_objfile_data (objfile
);
2060 if (objfile
->sf
!= NULL
)
2062 (*objfile
->sf
->sym_finish
) (objfile
);
2065 /* We never make this a mapped file. */
2067 objfile
->psymbol_cache
= bcache_xmalloc ();
2068 objfile
->macro_cache
= bcache_xmalloc ();
2069 /* obstack_init also initializes the obstack so it is
2070 empty. We could use obstack_specify_allocation but
2071 gdb_obstack.h specifies the alloc/dealloc
2073 obstack_init (&objfile
->objfile_obstack
);
2074 if (build_objfile_section_table (objfile
))
2076 error (_("Can't find the file sections in `%s': %s"),
2077 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2079 terminate_minimal_symbol_table (objfile
);
2081 /* We use the same section offsets as from last time. I'm not
2082 sure whether that is always correct for shared libraries. */
2083 objfile
->section_offsets
= (struct section_offsets
*)
2084 obstack_alloc (&objfile
->objfile_obstack
,
2085 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2086 memcpy (objfile
->section_offsets
, offsets
,
2087 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2088 objfile
->num_sections
= num_offsets
;
2090 /* What the hell is sym_new_init for, anyway? The concept of
2091 distinguishing between the main file and additional files
2092 in this way seems rather dubious. */
2093 if (objfile
== symfile_objfile
)
2095 (*objfile
->sf
->sym_new_init
) (objfile
);
2098 (*objfile
->sf
->sym_init
) (objfile
);
2099 clear_complaints (&symfile_complaints
, 1, 1);
2100 /* The "mainline" parameter is a hideous hack; I think leaving it
2101 zero is OK since dbxread.c also does what it needs to do if
2102 objfile->global_psymbols.size is 0. */
2103 (*objfile
->sf
->sym_read
) (objfile
, 0);
2104 if (!have_partial_symbols () && !have_full_symbols ())
2107 printf_unfiltered (_("(no debugging symbols found)\n"));
2110 objfile
->flags
|= OBJF_SYMS
;
2112 /* We're done reading the symbol file; finish off complaints. */
2113 clear_complaints (&symfile_complaints
, 0, 1);
2115 /* Getting new symbols may change our opinion about what is
2118 reinit_frame_cache ();
2120 /* Discard cleanups as symbol reading was successful. */
2121 discard_cleanups (old_cleanups
);
2123 /* If the mtime has changed between the time we set new_modtime
2124 and now, we *want* this to be out of date, so don't call stat
2126 objfile
->mtime
= new_modtime
;
2128 reread_separate_symbols (objfile
);
2135 clear_symtab_users ();
2136 /* At least one objfile has changed, so we can consider that
2137 the executable we're debugging has changed too. */
2138 observer_notify_executable_changed (NULL
);
2144 /* Handle separate debug info for OBJFILE, which has just been
2146 - If we had separate debug info before, but now we don't, get rid
2147 of the separated objfile.
2148 - If we didn't have separated debug info before, but now we do,
2149 read in the new separated debug info file.
2150 - If the debug link points to a different file, toss the old one
2151 and read the new one.
2152 This function does *not* handle the case where objfile is still
2153 using the same separate debug info file, but that file's timestamp
2154 has changed. That case should be handled by the loop in
2155 reread_symbols already. */
2157 reread_separate_symbols (struct objfile
*objfile
)
2160 unsigned long crc32
;
2162 /* Does the updated objfile's debug info live in a
2164 debug_file
= find_separate_debug_file (objfile
);
2166 if (objfile
->separate_debug_objfile
)
2168 /* There are two cases where we need to get rid of
2169 the old separated debug info objfile:
2170 - if the new primary objfile doesn't have
2171 separated debug info, or
2172 - if the new primary objfile has separate debug
2173 info, but it's under a different filename.
2175 If the old and new objfiles both have separate
2176 debug info, under the same filename, then we're
2177 okay --- if the separated file's contents have
2178 changed, we will have caught that when we
2179 visited it in this function's outermost
2182 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2183 free_objfile (objfile
->separate_debug_objfile
);
2186 /* If the new objfile has separate debug info, and we
2187 haven't loaded it already, do so now. */
2189 && ! objfile
->separate_debug_objfile
)
2191 /* Use the same section offset table as objfile itself.
2192 Preserve the flags from objfile that make sense. */
2193 objfile
->separate_debug_objfile
2194 = (symbol_file_add_with_addrs_or_offsets
2195 (symfile_bfd_open (debug_file
),
2196 info_verbose
, /* from_tty: Don't override the default. */
2197 0, /* No addr table. */
2198 objfile
->section_offsets
, objfile
->num_sections
,
2199 0, /* Not mainline. See comments about this above. */
2200 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2201 | OBJF_USERLOADED
)));
2202 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2218 static filename_language
*filename_language_table
;
2219 static int fl_table_size
, fl_table_next
;
2222 add_filename_language (char *ext
, enum language lang
)
2224 if (fl_table_next
>= fl_table_size
)
2226 fl_table_size
+= 10;
2227 filename_language_table
=
2228 xrealloc (filename_language_table
,
2229 fl_table_size
* sizeof (*filename_language_table
));
2232 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2233 filename_language_table
[fl_table_next
].lang
= lang
;
2237 static char *ext_args
;
2239 show_ext_args (struct ui_file
*file
, int from_tty
,
2240 struct cmd_list_element
*c
, const char *value
)
2242 fprintf_filtered (file
, _("\
2243 Mapping between filename extension and source language is \"%s\".\n"),
2248 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2251 char *cp
= ext_args
;
2254 /* First arg is filename extension, starting with '.' */
2256 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2258 /* Find end of first arg. */
2259 while (*cp
&& !isspace (*cp
))
2263 error (_("'%s': two arguments required -- filename extension and language"),
2266 /* Null-terminate first arg */
2269 /* Find beginning of second arg, which should be a source language. */
2270 while (*cp
&& isspace (*cp
))
2274 error (_("'%s': two arguments required -- filename extension and language"),
2277 /* Lookup the language from among those we know. */
2278 lang
= language_enum (cp
);
2280 /* Now lookup the filename extension: do we already know it? */
2281 for (i
= 0; i
< fl_table_next
; i
++)
2282 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2285 if (i
>= fl_table_next
)
2287 /* new file extension */
2288 add_filename_language (ext_args
, lang
);
2292 /* redefining a previously known filename extension */
2295 /* query ("Really make files of type %s '%s'?", */
2296 /* ext_args, language_str (lang)); */
2298 xfree (filename_language_table
[i
].ext
);
2299 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2300 filename_language_table
[i
].lang
= lang
;
2305 info_ext_lang_command (char *args
, int from_tty
)
2309 printf_filtered (_("Filename extensions and the languages they represent:"));
2310 printf_filtered ("\n\n");
2311 for (i
= 0; i
< fl_table_next
; i
++)
2312 printf_filtered ("\t%s\t- %s\n",
2313 filename_language_table
[i
].ext
,
2314 language_str (filename_language_table
[i
].lang
));
2318 init_filename_language_table (void)
2320 if (fl_table_size
== 0) /* protect against repetition */
2324 filename_language_table
=
2325 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2326 add_filename_language (".c", language_c
);
2327 add_filename_language (".C", language_cplus
);
2328 add_filename_language (".cc", language_cplus
);
2329 add_filename_language (".cp", language_cplus
);
2330 add_filename_language (".cpp", language_cplus
);
2331 add_filename_language (".cxx", language_cplus
);
2332 add_filename_language (".c++", language_cplus
);
2333 add_filename_language (".java", language_java
);
2334 add_filename_language (".class", language_java
);
2335 add_filename_language (".m", language_objc
);
2336 add_filename_language (".f", language_fortran
);
2337 add_filename_language (".F", language_fortran
);
2338 add_filename_language (".s", language_asm
);
2339 add_filename_language (".S", language_asm
);
2340 add_filename_language (".pas", language_pascal
);
2341 add_filename_language (".p", language_pascal
);
2342 add_filename_language (".pp", language_pascal
);
2343 add_filename_language (".adb", language_ada
);
2344 add_filename_language (".ads", language_ada
);
2345 add_filename_language (".a", language_ada
);
2346 add_filename_language (".ada", language_ada
);
2351 deduce_language_from_filename (char *filename
)
2356 if (filename
!= NULL
)
2357 if ((cp
= strrchr (filename
, '.')) != NULL
)
2358 for (i
= 0; i
< fl_table_next
; i
++)
2359 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2360 return filename_language_table
[i
].lang
;
2362 return language_unknown
;
2367 Allocate and partly initialize a new symbol table. Return a pointer
2368 to it. error() if no space.
2370 Caller must set these fields:
2376 possibly free_named_symtabs (symtab->filename);
2380 allocate_symtab (char *filename
, struct objfile
*objfile
)
2382 struct symtab
*symtab
;
2384 symtab
= (struct symtab
*)
2385 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2386 memset (symtab
, 0, sizeof (*symtab
));
2387 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2388 &objfile
->objfile_obstack
);
2389 symtab
->fullname
= NULL
;
2390 symtab
->language
= deduce_language_from_filename (filename
);
2391 symtab
->debugformat
= obsavestring ("unknown", 7,
2392 &objfile
->objfile_obstack
);
2394 /* Hook it to the objfile it comes from */
2396 symtab
->objfile
= objfile
;
2397 symtab
->next
= objfile
->symtabs
;
2398 objfile
->symtabs
= symtab
;
2400 /* FIXME: This should go away. It is only defined for the Z8000,
2401 and the Z8000 definition of this macro doesn't have anything to
2402 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2403 here for convenience. */
2404 #ifdef INIT_EXTRA_SYMTAB_INFO
2405 INIT_EXTRA_SYMTAB_INFO (symtab
);
2411 struct partial_symtab
*
2412 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2414 struct partial_symtab
*psymtab
;
2416 if (objfile
->free_psymtabs
)
2418 psymtab
= objfile
->free_psymtabs
;
2419 objfile
->free_psymtabs
= psymtab
->next
;
2422 psymtab
= (struct partial_symtab
*)
2423 obstack_alloc (&objfile
->objfile_obstack
,
2424 sizeof (struct partial_symtab
));
2426 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2427 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2428 &objfile
->objfile_obstack
);
2429 psymtab
->symtab
= NULL
;
2431 /* Prepend it to the psymtab list for the objfile it belongs to.
2432 Psymtabs are searched in most recent inserted -> least recent
2435 psymtab
->objfile
= objfile
;
2436 psymtab
->next
= objfile
->psymtabs
;
2437 objfile
->psymtabs
= psymtab
;
2440 struct partial_symtab
**prev_pst
;
2441 psymtab
->objfile
= objfile
;
2442 psymtab
->next
= NULL
;
2443 prev_pst
= &(objfile
->psymtabs
);
2444 while ((*prev_pst
) != NULL
)
2445 prev_pst
= &((*prev_pst
)->next
);
2446 (*prev_pst
) = psymtab
;
2454 discard_psymtab (struct partial_symtab
*pst
)
2456 struct partial_symtab
**prev_pst
;
2459 Empty psymtabs happen as a result of header files which don't
2460 have any symbols in them. There can be a lot of them. But this
2461 check is wrong, in that a psymtab with N_SLINE entries but
2462 nothing else is not empty, but we don't realize that. Fixing
2463 that without slowing things down might be tricky. */
2465 /* First, snip it out of the psymtab chain */
2467 prev_pst
= &(pst
->objfile
->psymtabs
);
2468 while ((*prev_pst
) != pst
)
2469 prev_pst
= &((*prev_pst
)->next
);
2470 (*prev_pst
) = pst
->next
;
2472 /* Next, put it on a free list for recycling */
2474 pst
->next
= pst
->objfile
->free_psymtabs
;
2475 pst
->objfile
->free_psymtabs
= pst
;
2479 /* Reset all data structures in gdb which may contain references to symbol
2483 clear_symtab_users (void)
2485 /* Someday, we should do better than this, by only blowing away
2486 the things that really need to be blown. */
2488 /* Clear the "current" symtab first, because it is no longer valid.
2489 breakpoint_re_set may try to access the current symtab. */
2490 clear_current_source_symtab_and_line ();
2493 breakpoint_re_set ();
2494 set_default_breakpoint (0, 0, 0, 0);
2495 clear_pc_function_cache ();
2496 if (deprecated_target_new_objfile_hook
)
2497 deprecated_target_new_objfile_hook (NULL
);
2501 clear_symtab_users_cleanup (void *ignore
)
2503 clear_symtab_users ();
2506 /* clear_symtab_users_once:
2508 This function is run after symbol reading, or from a cleanup.
2509 If an old symbol table was obsoleted, the old symbol table
2510 has been blown away, but the other GDB data structures that may
2511 reference it have not yet been cleared or re-directed. (The old
2512 symtab was zapped, and the cleanup queued, in free_named_symtab()
2515 This function can be queued N times as a cleanup, or called
2516 directly; it will do all the work the first time, and then will be a
2517 no-op until the next time it is queued. This works by bumping a
2518 counter at queueing time. Much later when the cleanup is run, or at
2519 the end of symbol processing (in case the cleanup is discarded), if
2520 the queued count is greater than the "done-count", we do the work
2521 and set the done-count to the queued count. If the queued count is
2522 less than or equal to the done-count, we just ignore the call. This
2523 is needed because reading a single .o file will often replace many
2524 symtabs (one per .h file, for example), and we don't want to reset
2525 the breakpoints N times in the user's face.
2527 The reason we both queue a cleanup, and call it directly after symbol
2528 reading, is because the cleanup protects us in case of errors, but is
2529 discarded if symbol reading is successful. */
2532 /* FIXME: As free_named_symtabs is currently a big noop this function
2533 is no longer needed. */
2534 static void clear_symtab_users_once (void);
2536 static int clear_symtab_users_queued
;
2537 static int clear_symtab_users_done
;
2540 clear_symtab_users_once (void)
2542 /* Enforce once-per-`do_cleanups'-semantics */
2543 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2545 clear_symtab_users_done
= clear_symtab_users_queued
;
2547 clear_symtab_users ();
2551 /* Delete the specified psymtab, and any others that reference it. */
2554 cashier_psymtab (struct partial_symtab
*pst
)
2556 struct partial_symtab
*ps
, *pprev
= NULL
;
2559 /* Find its previous psymtab in the chain */
2560 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2569 /* Unhook it from the chain. */
2570 if (ps
== pst
->objfile
->psymtabs
)
2571 pst
->objfile
->psymtabs
= ps
->next
;
2573 pprev
->next
= ps
->next
;
2575 /* FIXME, we can't conveniently deallocate the entries in the
2576 partial_symbol lists (global_psymbols/static_psymbols) that
2577 this psymtab points to. These just take up space until all
2578 the psymtabs are reclaimed. Ditto the dependencies list and
2579 filename, which are all in the objfile_obstack. */
2581 /* We need to cashier any psymtab that has this one as a dependency... */
2583 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2585 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2587 if (ps
->dependencies
[i
] == pst
)
2589 cashier_psymtab (ps
);
2590 goto again
; /* Must restart, chain has been munged. */
2597 /* If a symtab or psymtab for filename NAME is found, free it along
2598 with any dependent breakpoints, displays, etc.
2599 Used when loading new versions of object modules with the "add-file"
2600 command. This is only called on the top-level symtab or psymtab's name;
2601 it is not called for subsidiary files such as .h files.
2603 Return value is 1 if we blew away the environment, 0 if not.
2604 FIXME. The return value appears to never be used.
2606 FIXME. I think this is not the best way to do this. We should
2607 work on being gentler to the environment while still cleaning up
2608 all stray pointers into the freed symtab. */
2611 free_named_symtabs (char *name
)
2614 /* FIXME: With the new method of each objfile having it's own
2615 psymtab list, this function needs serious rethinking. In particular,
2616 why was it ever necessary to toss psymtabs with specific compilation
2617 unit filenames, as opposed to all psymtabs from a particular symbol
2619 Well, the answer is that some systems permit reloading of particular
2620 compilation units. We want to blow away any old info about these
2621 compilation units, regardless of which objfiles they arrived in. --gnu. */
2624 struct symtab
*prev
;
2625 struct partial_symtab
*ps
;
2626 struct blockvector
*bv
;
2629 /* We only wack things if the symbol-reload switch is set. */
2630 if (!symbol_reloading
)
2633 /* Some symbol formats have trouble providing file names... */
2634 if (name
== 0 || *name
== '\0')
2637 /* Look for a psymtab with the specified name. */
2640 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2642 if (strcmp (name
, ps
->filename
) == 0)
2644 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2645 goto again2
; /* Must restart, chain has been munged */
2649 /* Look for a symtab with the specified name. */
2651 for (s
= symtab_list
; s
; s
= s
->next
)
2653 if (strcmp (name
, s
->filename
) == 0)
2660 if (s
== symtab_list
)
2661 symtab_list
= s
->next
;
2663 prev
->next
= s
->next
;
2665 /* For now, queue a delete for all breakpoints, displays, etc., whether
2666 or not they depend on the symtab being freed. This should be
2667 changed so that only those data structures affected are deleted. */
2669 /* But don't delete anything if the symtab is empty.
2670 This test is necessary due to a bug in "dbxread.c" that
2671 causes empty symtabs to be created for N_SO symbols that
2672 contain the pathname of the object file. (This problem
2673 has been fixed in GDB 3.9x). */
2675 bv
= BLOCKVECTOR (s
);
2676 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2677 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2678 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2680 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
2682 clear_symtab_users_queued
++;
2683 make_cleanup (clear_symtab_users_once
, 0);
2687 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
2694 /* It is still possible that some breakpoints will be affected
2695 even though no symtab was found, since the file might have
2696 been compiled without debugging, and hence not be associated
2697 with a symtab. In order to handle this correctly, we would need
2698 to keep a list of text address ranges for undebuggable files.
2699 For now, we do nothing, since this is a fairly obscure case. */
2703 /* FIXME, what about the minimal symbol table? */
2710 /* Allocate and partially fill a partial symtab. It will be
2711 completely filled at the end of the symbol list.
2713 FILENAME is the name of the symbol-file we are reading from. */
2715 struct partial_symtab
*
2716 start_psymtab_common (struct objfile
*objfile
,
2717 struct section_offsets
*section_offsets
, char *filename
,
2718 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2719 struct partial_symbol
**static_syms
)
2721 struct partial_symtab
*psymtab
;
2723 psymtab
= allocate_psymtab (filename
, objfile
);
2724 psymtab
->section_offsets
= section_offsets
;
2725 psymtab
->textlow
= textlow
;
2726 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2727 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2728 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2732 /* Add a symbol with a long value to a psymtab.
2733 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2734 Return the partial symbol that has been added. */
2736 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2737 symbol is so that callers can get access to the symbol's demangled
2738 name, which they don't have any cheap way to determine otherwise.
2739 (Currenly, dwarf2read.c is the only file who uses that information,
2740 though it's possible that other readers might in the future.)
2741 Elena wasn't thrilled about that, and I don't blame her, but we
2742 couldn't come up with a better way to get that information. If
2743 it's needed in other situations, we could consider breaking up
2744 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2747 const struct partial_symbol
*
2748 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2749 enum address_class
class,
2750 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2751 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2752 enum language language
, struct objfile
*objfile
)
2754 struct partial_symbol
*psym
;
2755 char *buf
= alloca (namelength
+ 1);
2756 /* psymbol is static so that there will be no uninitialized gaps in the
2757 structure which might contain random data, causing cache misses in
2759 static struct partial_symbol psymbol
;
2761 /* Create local copy of the partial symbol */
2762 memcpy (buf
, name
, namelength
);
2763 buf
[namelength
] = '\0';
2764 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2767 SYMBOL_VALUE (&psymbol
) = val
;
2771 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2773 SYMBOL_SECTION (&psymbol
) = 0;
2774 SYMBOL_LANGUAGE (&psymbol
) = language
;
2775 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2776 PSYMBOL_CLASS (&psymbol
) = class;
2778 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2780 /* Stash the partial symbol away in the cache */
2781 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2782 objfile
->psymbol_cache
);
2784 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2785 if (list
->next
>= list
->list
+ list
->size
)
2787 extend_psymbol_list (list
, objfile
);
2789 *list
->next
++ = psym
;
2790 OBJSTAT (objfile
, n_psyms
++);
2795 /* Add a symbol with a long value to a psymtab. This differs from
2796 * add_psymbol_to_list above in taking both a mangled and a demangled
2800 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2801 int dem_namelength
, domain_enum domain
,
2802 enum address_class
class,
2803 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2804 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2805 enum language language
,
2806 struct objfile
*objfile
)
2808 struct partial_symbol
*psym
;
2809 char *buf
= alloca (namelength
+ 1);
2810 /* psymbol is static so that there will be no uninitialized gaps in the
2811 structure which might contain random data, causing cache misses in
2813 static struct partial_symbol psymbol
;
2815 /* Create local copy of the partial symbol */
2817 memcpy (buf
, name
, namelength
);
2818 buf
[namelength
] = '\0';
2819 DEPRECATED_SYMBOL_NAME (&psymbol
) = deprecated_bcache (buf
, namelength
+ 1,
2820 objfile
->psymbol_cache
);
2822 buf
= alloca (dem_namelength
+ 1);
2823 memcpy (buf
, dem_name
, dem_namelength
);
2824 buf
[dem_namelength
] = '\0';
2829 case language_cplus
:
2830 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2831 deprecated_bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2833 /* FIXME What should be done for the default case? Ignoring for now. */
2836 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2839 SYMBOL_VALUE (&psymbol
) = val
;
2843 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2845 SYMBOL_SECTION (&psymbol
) = 0;
2846 SYMBOL_LANGUAGE (&psymbol
) = language
;
2847 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2848 PSYMBOL_CLASS (&psymbol
) = class;
2849 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2851 /* Stash the partial symbol away in the cache */
2852 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2853 objfile
->psymbol_cache
);
2855 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2856 if (list
->next
>= list
->list
+ list
->size
)
2858 extend_psymbol_list (list
, objfile
);
2860 *list
->next
++ = psym
;
2861 OBJSTAT (objfile
, n_psyms
++);
2864 /* Initialize storage for partial symbols. */
2867 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2869 /* Free any previously allocated psymbol lists. */
2871 if (objfile
->global_psymbols
.list
)
2873 xfree (objfile
->global_psymbols
.list
);
2875 if (objfile
->static_psymbols
.list
)
2877 xfree (objfile
->static_psymbols
.list
);
2880 /* Current best guess is that approximately a twentieth
2881 of the total symbols (in a debugging file) are global or static
2884 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2885 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2887 if (objfile
->global_psymbols
.size
> 0)
2889 objfile
->global_psymbols
.next
=
2890 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2891 xmalloc ((objfile
->global_psymbols
.size
2892 * sizeof (struct partial_symbol
*)));
2894 if (objfile
->static_psymbols
.size
> 0)
2896 objfile
->static_psymbols
.next
=
2897 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2898 xmalloc ((objfile
->static_psymbols
.size
2899 * sizeof (struct partial_symbol
*)));
2904 The following code implements an abstraction for debugging overlay sections.
2906 The target model is as follows:
2907 1) The gnu linker will permit multiple sections to be mapped into the
2908 same VMA, each with its own unique LMA (or load address).
2909 2) It is assumed that some runtime mechanism exists for mapping the
2910 sections, one by one, from the load address into the VMA address.
2911 3) This code provides a mechanism for gdb to keep track of which
2912 sections should be considered to be mapped from the VMA to the LMA.
2913 This information is used for symbol lookup, and memory read/write.
2914 For instance, if a section has been mapped then its contents
2915 should be read from the VMA, otherwise from the LMA.
2917 Two levels of debugger support for overlays are available. One is
2918 "manual", in which the debugger relies on the user to tell it which
2919 overlays are currently mapped. This level of support is
2920 implemented entirely in the core debugger, and the information about
2921 whether a section is mapped is kept in the objfile->obj_section table.
2923 The second level of support is "automatic", and is only available if
2924 the target-specific code provides functionality to read the target's
2925 overlay mapping table, and translate its contents for the debugger
2926 (by updating the mapped state information in the obj_section tables).
2928 The interface is as follows:
2930 overlay map <name> -- tell gdb to consider this section mapped
2931 overlay unmap <name> -- tell gdb to consider this section unmapped
2932 overlay list -- list the sections that GDB thinks are mapped
2933 overlay read-target -- get the target's state of what's mapped
2934 overlay off/manual/auto -- set overlay debugging state
2935 Functional interface:
2936 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2937 section, return that section.
2938 find_pc_overlay(pc): find any overlay section that contains
2939 the pc, either in its VMA or its LMA
2940 overlay_is_mapped(sect): true if overlay is marked as mapped
2941 section_is_overlay(sect): true if section's VMA != LMA
2942 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2943 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2944 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2945 overlay_mapped_address(...): map an address from section's LMA to VMA
2946 overlay_unmapped_address(...): map an address from section's VMA to LMA
2947 symbol_overlayed_address(...): Return a "current" address for symbol:
2948 either in VMA or LMA depending on whether
2949 the symbol's section is currently mapped
2952 /* Overlay debugging state: */
2954 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2955 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2957 /* Target vector for refreshing overlay mapped state */
2958 static void simple_overlay_update (struct obj_section
*);
2959 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2961 /* Function: section_is_overlay (SECTION)
2962 Returns true if SECTION has VMA not equal to LMA, ie.
2963 SECTION is loaded at an address different from where it will "run". */
2966 section_is_overlay (asection
*section
)
2968 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2970 if (overlay_debugging
)
2971 if (section
&& section
->lma
!= 0 &&
2972 section
->vma
!= section
->lma
)
2978 /* Function: overlay_invalidate_all (void)
2979 Invalidate the mapped state of all overlay sections (mark it as stale). */
2982 overlay_invalidate_all (void)
2984 struct objfile
*objfile
;
2985 struct obj_section
*sect
;
2987 ALL_OBJSECTIONS (objfile
, sect
)
2988 if (section_is_overlay (sect
->the_bfd_section
))
2989 sect
->ovly_mapped
= -1;
2992 /* Function: overlay_is_mapped (SECTION)
2993 Returns true if section is an overlay, and is currently mapped.
2994 Private: public access is thru function section_is_mapped.
2996 Access to the ovly_mapped flag is restricted to this function, so
2997 that we can do automatic update. If the global flag
2998 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2999 overlay_invalidate_all. If the mapped state of the particular
3000 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3003 overlay_is_mapped (struct obj_section
*osect
)
3005 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
3008 switch (overlay_debugging
)
3012 return 0; /* overlay debugging off */
3013 case ovly_auto
: /* overlay debugging automatic */
3014 /* Unles there is a target_overlay_update function,
3015 there's really nothing useful to do here (can't really go auto) */
3016 if (target_overlay_update
)
3018 if (overlay_cache_invalid
)
3020 overlay_invalidate_all ();
3021 overlay_cache_invalid
= 0;
3023 if (osect
->ovly_mapped
== -1)
3024 (*target_overlay_update
) (osect
);
3026 /* fall thru to manual case */
3027 case ovly_on
: /* overlay debugging manual */
3028 return osect
->ovly_mapped
== 1;
3032 /* Function: section_is_mapped
3033 Returns true if section is an overlay, and is currently mapped. */
3036 section_is_mapped (asection
*section
)
3038 struct objfile
*objfile
;
3039 struct obj_section
*osect
;
3041 if (overlay_debugging
)
3042 if (section
&& section_is_overlay (section
))
3043 ALL_OBJSECTIONS (objfile
, osect
)
3044 if (osect
->the_bfd_section
== section
)
3045 return overlay_is_mapped (osect
);
3050 /* Function: pc_in_unmapped_range
3051 If PC falls into the lma range of SECTION, return true, else false. */
3054 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
3056 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3060 if (overlay_debugging
)
3061 if (section
&& section_is_overlay (section
))
3063 size
= bfd_get_section_size (section
);
3064 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
3070 /* Function: pc_in_mapped_range
3071 If PC falls into the vma range of SECTION, return true, else false. */
3074 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
3076 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3080 if (overlay_debugging
)
3081 if (section
&& section_is_overlay (section
))
3083 size
= bfd_get_section_size (section
);
3084 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
3091 /* Return true if the mapped ranges of sections A and B overlap, false
3094 sections_overlap (asection
*a
, asection
*b
)
3096 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3098 CORE_ADDR a_start
= a
->vma
;
3099 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size (a
);
3100 CORE_ADDR b_start
= b
->vma
;
3101 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size (b
);
3103 return (a_start
< b_end
&& b_start
< a_end
);
3106 /* Function: overlay_unmapped_address (PC, SECTION)
3107 Returns the address corresponding to PC in the unmapped (load) range.
3108 May be the same as PC. */
3111 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3113 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3115 if (overlay_debugging
)
3116 if (section
&& section_is_overlay (section
) &&
3117 pc_in_mapped_range (pc
, section
))
3118 return pc
+ section
->lma
- section
->vma
;
3123 /* Function: overlay_mapped_address (PC, SECTION)
3124 Returns the address corresponding to PC in the mapped (runtime) range.
3125 May be the same as PC. */
3128 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3130 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3132 if (overlay_debugging
)
3133 if (section
&& section_is_overlay (section
) &&
3134 pc_in_unmapped_range (pc
, section
))
3135 return pc
+ section
->vma
- section
->lma
;
3141 /* Function: symbol_overlayed_address
3142 Return one of two addresses (relative to the VMA or to the LMA),
3143 depending on whether the section is mapped or not. */
3146 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3148 if (overlay_debugging
)
3150 /* If the symbol has no section, just return its regular address. */
3153 /* If the symbol's section is not an overlay, just return its address */
3154 if (!section_is_overlay (section
))
3156 /* If the symbol's section is mapped, just return its address */
3157 if (section_is_mapped (section
))
3160 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3161 * then return its LOADED address rather than its vma address!!
3163 return overlay_unmapped_address (address
, section
);
3168 /* Function: find_pc_overlay (PC)
3169 Return the best-match overlay section for PC:
3170 If PC matches a mapped overlay section's VMA, return that section.
3171 Else if PC matches an unmapped section's VMA, return that section.
3172 Else if PC matches an unmapped section's LMA, return that section. */
3175 find_pc_overlay (CORE_ADDR pc
)
3177 struct objfile
*objfile
;
3178 struct obj_section
*osect
, *best_match
= NULL
;
3180 if (overlay_debugging
)
3181 ALL_OBJSECTIONS (objfile
, osect
)
3182 if (section_is_overlay (osect
->the_bfd_section
))
3184 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3186 if (overlay_is_mapped (osect
))
3187 return osect
->the_bfd_section
;
3191 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3194 return best_match
? best_match
->the_bfd_section
: NULL
;
3197 /* Function: find_pc_mapped_section (PC)
3198 If PC falls into the VMA address range of an overlay section that is
3199 currently marked as MAPPED, return that section. Else return NULL. */
3202 find_pc_mapped_section (CORE_ADDR pc
)
3204 struct objfile
*objfile
;
3205 struct obj_section
*osect
;
3207 if (overlay_debugging
)
3208 ALL_OBJSECTIONS (objfile
, osect
)
3209 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3210 overlay_is_mapped (osect
))
3211 return osect
->the_bfd_section
;
3216 /* Function: list_overlays_command
3217 Print a list of mapped sections and their PC ranges */
3220 list_overlays_command (char *args
, int from_tty
)
3223 struct objfile
*objfile
;
3224 struct obj_section
*osect
;
3226 if (overlay_debugging
)
3227 ALL_OBJSECTIONS (objfile
, osect
)
3228 if (overlay_is_mapped (osect
))
3234 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3235 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3236 size
= bfd_get_section_size (osect
->the_bfd_section
);
3237 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3239 printf_filtered ("Section %s, loaded at ", name
);
3240 deprecated_print_address_numeric (lma
, 1, gdb_stdout
);
3241 puts_filtered (" - ");
3242 deprecated_print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3243 printf_filtered (", mapped at ");
3244 deprecated_print_address_numeric (vma
, 1, gdb_stdout
);
3245 puts_filtered (" - ");
3246 deprecated_print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3247 puts_filtered ("\n");
3252 printf_filtered (_("No sections are mapped.\n"));
3255 /* Function: map_overlay_command
3256 Mark the named section as mapped (ie. residing at its VMA address). */
3259 map_overlay_command (char *args
, int from_tty
)
3261 struct objfile
*objfile
, *objfile2
;
3262 struct obj_section
*sec
, *sec2
;
3265 if (!overlay_debugging
)
3267 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3268 the 'overlay manual' command."));
3270 if (args
== 0 || *args
== 0)
3271 error (_("Argument required: name of an overlay section"));
3273 /* First, find a section matching the user supplied argument */
3274 ALL_OBJSECTIONS (objfile
, sec
)
3275 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3277 /* Now, check to see if the section is an overlay. */
3278 bfdsec
= sec
->the_bfd_section
;
3279 if (!section_is_overlay (bfdsec
))
3280 continue; /* not an overlay section */
3282 /* Mark the overlay as "mapped" */
3283 sec
->ovly_mapped
= 1;
3285 /* Next, make a pass and unmap any sections that are
3286 overlapped by this new section: */
3287 ALL_OBJSECTIONS (objfile2
, sec2
)
3288 if (sec2
->ovly_mapped
3290 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3291 && sections_overlap (sec
->the_bfd_section
,
3292 sec2
->the_bfd_section
))
3295 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3296 bfd_section_name (objfile
->obfd
,
3297 sec2
->the_bfd_section
));
3298 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3302 error (_("No overlay section called %s"), args
);
3305 /* Function: unmap_overlay_command
3306 Mark the overlay section as unmapped
3307 (ie. resident in its LMA address range, rather than the VMA range). */
3310 unmap_overlay_command (char *args
, int from_tty
)
3312 struct objfile
*objfile
;
3313 struct obj_section
*sec
;
3315 if (!overlay_debugging
)
3317 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3318 the 'overlay manual' command."));
3320 if (args
== 0 || *args
== 0)
3321 error (_("Argument required: name of an overlay section"));
3323 /* First, find a section matching the user supplied argument */
3324 ALL_OBJSECTIONS (objfile
, sec
)
3325 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3327 if (!sec
->ovly_mapped
)
3328 error (_("Section %s is not mapped"), args
);
3329 sec
->ovly_mapped
= 0;
3332 error (_("No overlay section called %s"), args
);
3335 /* Function: overlay_auto_command
3336 A utility command to turn on overlay debugging.
3337 Possibly this should be done via a set/show command. */
3340 overlay_auto_command (char *args
, int from_tty
)
3342 overlay_debugging
= ovly_auto
;
3343 enable_overlay_breakpoints ();
3345 printf_unfiltered (_("Automatic overlay debugging enabled."));
3348 /* Function: overlay_manual_command
3349 A utility command to turn on overlay debugging.
3350 Possibly this should be done via a set/show command. */
3353 overlay_manual_command (char *args
, int from_tty
)
3355 overlay_debugging
= ovly_on
;
3356 disable_overlay_breakpoints ();
3358 printf_unfiltered (_("Overlay debugging enabled."));
3361 /* Function: overlay_off_command
3362 A utility command to turn on overlay debugging.
3363 Possibly this should be done via a set/show command. */
3366 overlay_off_command (char *args
, int from_tty
)
3368 overlay_debugging
= ovly_off
;
3369 disable_overlay_breakpoints ();
3371 printf_unfiltered (_("Overlay debugging disabled."));
3375 overlay_load_command (char *args
, int from_tty
)
3377 if (target_overlay_update
)
3378 (*target_overlay_update
) (NULL
);
3380 error (_("This target does not know how to read its overlay state."));
3383 /* Function: overlay_command
3384 A place-holder for a mis-typed command */
3386 /* Command list chain containing all defined "overlay" subcommands. */
3387 struct cmd_list_element
*overlaylist
;
3390 overlay_command (char *args
, int from_tty
)
3393 ("\"overlay\" must be followed by the name of an overlay command.\n");
3394 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3398 /* Target Overlays for the "Simplest" overlay manager:
3400 This is GDB's default target overlay layer. It works with the
3401 minimal overlay manager supplied as an example by Cygnus. The
3402 entry point is via a function pointer "target_overlay_update",
3403 so targets that use a different runtime overlay manager can
3404 substitute their own overlay_update function and take over the
3407 The overlay_update function pokes around in the target's data structures
3408 to see what overlays are mapped, and updates GDB's overlay mapping with
3411 In this simple implementation, the target data structures are as follows:
3412 unsigned _novlys; /# number of overlay sections #/
3413 unsigned _ovly_table[_novlys][4] = {
3414 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3415 {..., ..., ..., ...},
3417 unsigned _novly_regions; /# number of overlay regions #/
3418 unsigned _ovly_region_table[_novly_regions][3] = {
3419 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3422 These functions will attempt to update GDB's mappedness state in the
3423 symbol section table, based on the target's mappedness state.
3425 To do this, we keep a cached copy of the target's _ovly_table, and
3426 attempt to detect when the cached copy is invalidated. The main
3427 entry point is "simple_overlay_update(SECT), which looks up SECT in
3428 the cached table and re-reads only the entry for that section from
3429 the target (whenever possible).
3432 /* Cached, dynamically allocated copies of the target data structures: */
3433 static unsigned (*cache_ovly_table
)[4] = 0;
3435 static unsigned (*cache_ovly_region_table
)[3] = 0;
3437 static unsigned cache_novlys
= 0;
3439 static unsigned cache_novly_regions
= 0;
3441 static CORE_ADDR cache_ovly_table_base
= 0;
3443 static CORE_ADDR cache_ovly_region_table_base
= 0;
3447 VMA
, SIZE
, LMA
, MAPPED
3449 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3451 /* Throw away the cached copy of _ovly_table */
3453 simple_free_overlay_table (void)
3455 if (cache_ovly_table
)
3456 xfree (cache_ovly_table
);
3458 cache_ovly_table
= NULL
;
3459 cache_ovly_table_base
= 0;
3463 /* Throw away the cached copy of _ovly_region_table */
3465 simple_free_overlay_region_table (void)
3467 if (cache_ovly_region_table
)
3468 xfree (cache_ovly_region_table
);
3469 cache_novly_regions
= 0;
3470 cache_ovly_region_table
= NULL
;
3471 cache_ovly_region_table_base
= 0;
3475 /* Read an array of ints from the target into a local buffer.
3476 Convert to host order. int LEN is number of ints */
3478 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3480 /* FIXME (alloca): Not safe if array is very large. */
3481 gdb_byte
*buf
= alloca (len
* TARGET_LONG_BYTES
);
3484 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3485 for (i
= 0; i
< len
; i
++)
3486 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3490 /* Find and grab a copy of the target _ovly_table
3491 (and _novlys, which is needed for the table's size) */
3493 simple_read_overlay_table (void)
3495 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3497 simple_free_overlay_table ();
3498 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3501 error (_("Error reading inferior's overlay table: "
3502 "couldn't find `_novlys' variable\n"
3503 "in inferior. Use `overlay manual' mode."));
3507 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3508 if (! ovly_table_msym
)
3510 error (_("Error reading inferior's overlay table: couldn't find "
3511 "`_ovly_table' array\n"
3512 "in inferior. Use `overlay manual' mode."));
3516 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3518 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3519 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3520 read_target_long_array (cache_ovly_table_base
,
3521 (unsigned int *) cache_ovly_table
,
3524 return 1; /* SUCCESS */
3528 /* Find and grab a copy of the target _ovly_region_table
3529 (and _novly_regions, which is needed for the table's size) */
3531 simple_read_overlay_region_table (void)
3533 struct minimal_symbol
*msym
;
3535 simple_free_overlay_region_table ();
3536 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3538 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3540 return 0; /* failure */
3541 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3542 if (cache_ovly_region_table
!= NULL
)
3544 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3547 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3548 read_target_long_array (cache_ovly_region_table_base
,
3549 (unsigned int *) cache_ovly_region_table
,
3550 cache_novly_regions
* 3);
3553 return 0; /* failure */
3556 return 0; /* failure */
3557 return 1; /* SUCCESS */
3561 /* Function: simple_overlay_update_1
3562 A helper function for simple_overlay_update. Assuming a cached copy
3563 of _ovly_table exists, look through it to find an entry whose vma,
3564 lma and size match those of OSECT. Re-read the entry and make sure
3565 it still matches OSECT (else the table may no longer be valid).
3566 Set OSECT's mapped state to match the entry. Return: 1 for
3567 success, 0 for failure. */
3570 simple_overlay_update_1 (struct obj_section
*osect
)
3573 bfd
*obfd
= osect
->objfile
->obfd
;
3574 asection
*bsect
= osect
->the_bfd_section
;
3576 size
= bfd_get_section_size (osect
->the_bfd_section
);
3577 for (i
= 0; i
< cache_novlys
; i
++)
3578 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3579 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3580 /* && cache_ovly_table[i][SIZE] == size */ )
3582 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3583 (unsigned int *) cache_ovly_table
[i
], 4);
3584 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3585 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3586 /* && cache_ovly_table[i][SIZE] == size */ )
3588 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3591 else /* Warning! Warning! Target's ovly table has changed! */
3597 /* Function: simple_overlay_update
3598 If OSECT is NULL, then update all sections' mapped state
3599 (after re-reading the entire target _ovly_table).
3600 If OSECT is non-NULL, then try to find a matching entry in the
3601 cached ovly_table and update only OSECT's mapped state.
3602 If a cached entry can't be found or the cache isn't valid, then
3603 re-read the entire cache, and go ahead and update all sections. */
3606 simple_overlay_update (struct obj_section
*osect
)
3608 struct objfile
*objfile
;
3610 /* Were we given an osect to look up? NULL means do all of them. */
3612 /* Have we got a cached copy of the target's overlay table? */
3613 if (cache_ovly_table
!= NULL
)
3614 /* Does its cached location match what's currently in the symtab? */
3615 if (cache_ovly_table_base
==
3616 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3617 /* Then go ahead and try to look up this single section in the cache */
3618 if (simple_overlay_update_1 (osect
))
3619 /* Found it! We're done. */
3622 /* Cached table no good: need to read the entire table anew.
3623 Or else we want all the sections, in which case it's actually
3624 more efficient to read the whole table in one block anyway. */
3626 if (! simple_read_overlay_table ())
3629 /* Now may as well update all sections, even if only one was requested. */
3630 ALL_OBJSECTIONS (objfile
, osect
)
3631 if (section_is_overlay (osect
->the_bfd_section
))
3634 bfd
*obfd
= osect
->objfile
->obfd
;
3635 asection
*bsect
= osect
->the_bfd_section
;
3637 size
= bfd_get_section_size (bsect
);
3638 for (i
= 0; i
< cache_novlys
; i
++)
3639 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3640 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3641 /* && cache_ovly_table[i][SIZE] == size */ )
3642 { /* obj_section matches i'th entry in ovly_table */
3643 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3644 break; /* finished with inner for loop: break out */
3649 /* Set the output sections and output offsets for section SECTP in
3650 ABFD. The relocation code in BFD will read these offsets, so we
3651 need to be sure they're initialized. We map each section to itself,
3652 with no offset; this means that SECTP->vma will be honored. */
3655 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3657 sectp
->output_section
= sectp
;
3658 sectp
->output_offset
= 0;
3661 /* Relocate the contents of a debug section SECTP in ABFD. The
3662 contents are stored in BUF if it is non-NULL, or returned in a
3663 malloc'd buffer otherwise.
3665 For some platforms and debug info formats, shared libraries contain
3666 relocations against the debug sections (particularly for DWARF-2;
3667 one affected platform is PowerPC GNU/Linux, although it depends on
3668 the version of the linker in use). Also, ELF object files naturally
3669 have unresolved relocations for their debug sections. We need to apply
3670 the relocations in order to get the locations of symbols correct. */
3673 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3675 /* We're only interested in debugging sections with relocation
3677 if ((sectp
->flags
& SEC_RELOC
) == 0)
3679 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3682 /* We will handle section offsets properly elsewhere, so relocate as if
3683 all sections begin at 0. */
3684 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3686 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3690 _initialize_symfile (void)
3692 struct cmd_list_element
*c
;
3694 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3695 Load symbol table from executable file FILE.\n\
3696 The `file' command can also load symbol tables, as well as setting the file\n\
3697 to execute."), &cmdlist
);
3698 set_cmd_completer (c
, filename_completer
);
3700 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3701 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3702 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3703 ADDR is the starting address of the file's text.\n\
3704 The optional arguments are section-name section-address pairs and\n\
3705 should be specified if the data and bss segments are not contiguous\n\
3706 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3708 set_cmd_completer (c
, filename_completer
);
3710 c
= add_cmd ("add-shared-symbol-files", class_files
,
3711 add_shared_symbol_files_command
, _("\
3712 Load the symbols from shared objects in the dynamic linker's link map."),
3714 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3717 c
= add_cmd ("load", class_files
, load_command
, _("\
3718 Dynamically load FILE into the running program, and record its symbols\n\
3719 for access from GDB."), &cmdlist
);
3720 set_cmd_completer (c
, filename_completer
);
3722 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3723 &symbol_reloading
, _("\
3724 Set dynamic symbol table reloading multiple times in one run."), _("\
3725 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3727 show_symbol_reloading
,
3728 &setlist
, &showlist
);
3730 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3731 _("Commands for debugging overlays."), &overlaylist
,
3732 "overlay ", 0, &cmdlist
);
3734 add_com_alias ("ovly", "overlay", class_alias
, 1);
3735 add_com_alias ("ov", "overlay", class_alias
, 1);
3737 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3738 _("Assert that an overlay section is mapped."), &overlaylist
);
3740 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3741 _("Assert that an overlay section is unmapped."), &overlaylist
);
3743 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3744 _("List mappings of overlay sections."), &overlaylist
);
3746 add_cmd ("manual", class_support
, overlay_manual_command
,
3747 _("Enable overlay debugging."), &overlaylist
);
3748 add_cmd ("off", class_support
, overlay_off_command
,
3749 _("Disable overlay debugging."), &overlaylist
);
3750 add_cmd ("auto", class_support
, overlay_auto_command
,
3751 _("Enable automatic overlay debugging."), &overlaylist
);
3752 add_cmd ("load-target", class_support
, overlay_load_command
,
3753 _("Read the overlay mapping state from the target."), &overlaylist
);
3755 /* Filename extension to source language lookup table: */
3756 init_filename_language_table ();
3757 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3759 Set mapping between filename extension and source language."), _("\
3760 Show mapping between filename extension and source language."), _("\
3761 Usage: set extension-language .foo bar"),
3762 set_ext_lang_command
,
3764 &setlist
, &showlist
);
3766 add_info ("extensions", info_ext_lang_command
,
3767 _("All filename extensions associated with a source language."));
3769 add_setshow_integer_cmd ("download-write-size", class_obscure
,
3770 &download_write_size
, _("\
3771 Set the write size used when downloading a program."), _("\
3772 Show the write size used when downloading a program."), _("\
3773 Only used when downloading a program onto a remote\n\
3774 target. Specify zero, or a negative value, to disable\n\
3775 blocked writes. The actual size of each transfer is also\n\
3776 limited by the size of the target packet and the memory\n\
3779 show_download_write_size
,
3780 &setlist
, &showlist
);
3782 debug_file_directory
= xstrdup (DEBUGDIR
);
3783 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3784 &debug_file_directory
, _("\
3785 Set the directory where separate debug symbols are searched for."), _("\
3786 Show the directory where separate debug symbols are searched for."), _("\
3787 Separate debug symbols are first searched for in the same\n\
3788 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3789 and lastly at the path of the directory of the binary with\n\
3790 the global debug-file directory prepended."),
3792 show_debug_file_directory
,
3793 &setlist
, &showlist
);