1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
37 #include "breakpoint.h"
39 #include "complaints.h"
41 #include "inferior.h" /* for write_pc */
42 #include "filenames.h" /* for DOSish file names */
43 #include "gdb-stabs.h"
44 #include "gdb_obstack.h"
45 #include "completer.h"
48 #include <readline/readline.h>
49 #include "gdb_assert.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
65 /* Some HP-UX related globals to clear when a new "main"
66 symbol file is loaded. HP-specific. */
68 extern int hp_som_som_object_present
;
69 extern int hp_cxx_exception_support_initialized
;
70 #define RESET_HP_UX_GLOBALS() do {\
71 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
72 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
76 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
77 void (*show_load_progress
) (const char *section
,
78 unsigned long section_sent
,
79 unsigned long section_size
,
80 unsigned long total_sent
,
81 unsigned long total_size
);
82 void (*pre_add_symbol_hook
) (char *);
83 void (*post_add_symbol_hook
) (void);
84 void (*target_new_objfile_hook
) (struct objfile
*);
86 static void clear_symtab_users_cleanup (void *ignore
);
88 /* Global variables owned by this file */
89 int readnow_symbol_files
; /* Read full symbols immediately */
91 /* External variables and functions referenced. */
93 extern void report_transfer_performance (unsigned long, time_t, time_t);
95 /* Functions this file defines */
98 static int simple_read_overlay_region_table (void);
99 static void simple_free_overlay_region_table (void);
102 static void set_initial_language (void);
104 static void load_command (char *, int);
106 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
108 static void add_symbol_file_command (char *, int);
110 static void add_shared_symbol_files_command (char *, int);
112 static void reread_separate_symbols (struct objfile
*objfile
);
114 static void cashier_psymtab (struct partial_symtab
*);
116 bfd
*symfile_bfd_open (char *);
118 int get_section_index (struct objfile
*, char *);
120 static void find_sym_fns (struct objfile
*);
122 static void decrement_reading_symtab (void *);
124 static void overlay_invalidate_all (void);
126 static int overlay_is_mapped (struct obj_section
*);
128 void list_overlays_command (char *, int);
130 void map_overlay_command (char *, int);
132 void unmap_overlay_command (char *, int);
134 static void overlay_auto_command (char *, int);
136 static void overlay_manual_command (char *, int);
138 static void overlay_off_command (char *, int);
140 static void overlay_load_command (char *, int);
142 static void overlay_command (char *, int);
144 static void simple_free_overlay_table (void);
146 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
148 static int simple_read_overlay_table (void);
150 static int simple_overlay_update_1 (struct obj_section
*);
152 static void add_filename_language (char *ext
, enum language lang
);
154 static void set_ext_lang_command (char *args
, int from_tty
);
156 static void info_ext_lang_command (char *args
, int from_tty
);
158 static char *find_separate_debug_file (struct objfile
*objfile
);
160 static void init_filename_language_table (void);
162 void _initialize_symfile (void);
164 /* List of all available sym_fns. On gdb startup, each object file reader
165 calls add_symtab_fns() to register information on each format it is
168 static struct sym_fns
*symtab_fns
= NULL
;
170 /* Flag for whether user will be reloading symbols multiple times.
171 Defaults to ON for VxWorks, otherwise OFF. */
173 #ifdef SYMBOL_RELOADING_DEFAULT
174 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
176 int symbol_reloading
= 0;
179 /* If non-zero, shared library symbols will be added automatically
180 when the inferior is created, new libraries are loaded, or when
181 attaching to the inferior. This is almost always what users will
182 want to have happen; but for very large programs, the startup time
183 will be excessive, and so if this is a problem, the user can clear
184 this flag and then add the shared library symbols as needed. Note
185 that there is a potential for confusion, since if the shared
186 library symbols are not loaded, commands like "info fun" will *not*
187 report all the functions that are actually present. */
189 int auto_solib_add
= 1;
191 /* For systems that support it, a threshold size in megabytes. If
192 automatically adding a new library's symbol table to those already
193 known to the debugger would cause the total shared library symbol
194 size to exceed this threshhold, then the shlib's symbols are not
195 added. The threshold is ignored if the user explicitly asks for a
196 shlib to be added, such as when using the "sharedlibrary"
199 int auto_solib_limit
;
202 /* This compares two partial symbols by names, using strcmp_iw_ordered
203 for the comparison. */
206 compare_psymbols (const void *s1p
, const void *s2p
)
208 struct partial_symbol
*const *s1
= s1p
;
209 struct partial_symbol
*const *s2
= s2p
;
211 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1
),
212 SYMBOL_NATURAL_NAME (*s2
));
216 sort_pst_symbols (struct partial_symtab
*pst
)
218 /* Sort the global list; don't sort the static list */
220 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
221 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
225 /* Make a null terminated copy of the string at PTR with SIZE characters in
226 the obstack pointed to by OBSTACKP . Returns the address of the copy.
227 Note that the string at PTR does not have to be null terminated, I.E. it
228 may be part of a larger string and we are only saving a substring. */
231 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
233 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
234 /* Open-coded memcpy--saves function call time. These strings are usually
235 short. FIXME: Is this really still true with a compiler that can
238 const char *p1
= ptr
;
240 const char *end
= ptr
+ size
;
248 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
249 in the obstack pointed to by OBSTACKP. */
252 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
255 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
256 char *val
= (char *) obstack_alloc (obstackp
, len
);
263 /* True if we are nested inside psymtab_to_symtab. */
265 int currently_reading_symtab
= 0;
268 decrement_reading_symtab (void *dummy
)
270 currently_reading_symtab
--;
273 /* Get the symbol table that corresponds to a partial_symtab.
274 This is fast after the first time you do it. In fact, there
275 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
279 psymtab_to_symtab (struct partial_symtab
*pst
)
281 /* If it's been looked up before, return it. */
285 /* If it has not yet been read in, read it. */
288 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
289 currently_reading_symtab
++;
290 (*pst
->read_symtab
) (pst
);
291 do_cleanups (back_to
);
297 /* Initialize entry point information for this objfile. */
300 init_entry_point_info (struct objfile
*objfile
)
302 /* Save startup file's range of PC addresses to help blockframe.c
303 decide where the bottom of the stack is. */
305 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
307 /* Executable file -- record its entry point so we'll recognize
308 the startup file because it contains the entry point. */
309 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
313 /* Examination of non-executable.o files. Short-circuit this stuff. */
314 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
316 objfile
->ei
.deprecated_entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
317 objfile
->ei
.deprecated_entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
318 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
319 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
320 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
321 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
324 /* Get current entry point address. */
327 entry_point_address (void)
329 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
332 /* Remember the lowest-addressed loadable section we've seen.
333 This function is called via bfd_map_over_sections.
335 In case of equal vmas, the section with the largest size becomes the
336 lowest-addressed loadable section.
338 If the vmas and sizes are equal, the last section is considered the
339 lowest-addressed loadable section. */
342 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
344 asection
**lowest
= (asection
**) obj
;
346 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
349 *lowest
= sect
; /* First loadable section */
350 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
351 *lowest
= sect
; /* A lower loadable section */
352 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
353 && (bfd_section_size (abfd
, (*lowest
))
354 <= bfd_section_size (abfd
, sect
)))
358 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
360 struct section_addr_info
*
361 alloc_section_addr_info (size_t num_sections
)
363 struct section_addr_info
*sap
;
366 size
= (sizeof (struct section_addr_info
)
367 + sizeof (struct other_sections
) * (num_sections
- 1));
368 sap
= (struct section_addr_info
*) xmalloc (size
);
369 memset (sap
, 0, size
);
370 sap
->num_sections
= num_sections
;
375 /* Build (allocate and populate) a section_addr_info struct from
376 an existing section table. */
378 extern struct section_addr_info
*
379 build_section_addr_info_from_section_table (const struct section_table
*start
,
380 const struct section_table
*end
)
382 struct section_addr_info
*sap
;
383 const struct section_table
*stp
;
386 sap
= alloc_section_addr_info (end
- start
);
388 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
390 if (bfd_get_section_flags (stp
->bfd
,
391 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
392 && oidx
< end
- start
)
394 sap
->other
[oidx
].addr
= stp
->addr
;
395 sap
->other
[oidx
].name
396 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
397 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
406 /* Free all memory allocated by build_section_addr_info_from_section_table. */
409 free_section_addr_info (struct section_addr_info
*sap
)
413 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
414 if (sap
->other
[idx
].name
)
415 xfree (sap
->other
[idx
].name
);
420 /* Initialize OBJFILE's sect_index_* members. */
422 init_objfile_sect_indices (struct objfile
*objfile
)
427 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
429 objfile
->sect_index_text
= sect
->index
;
431 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
433 objfile
->sect_index_data
= sect
->index
;
435 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
437 objfile
->sect_index_bss
= sect
->index
;
439 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
441 objfile
->sect_index_rodata
= sect
->index
;
443 /* This is where things get really weird... We MUST have valid
444 indices for the various sect_index_* members or gdb will abort.
445 So if for example, there is no ".text" section, we have to
446 accomodate that. Except when explicitly adding symbol files at
447 some address, section_offsets contains nothing but zeros, so it
448 doesn't matter which slot in section_offsets the individual
449 sect_index_* members index into. So if they are all zero, it is
450 safe to just point all the currently uninitialized indices to the
453 for (i
= 0; i
< objfile
->num_sections
; i
++)
455 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
460 if (i
== objfile
->num_sections
)
462 if (objfile
->sect_index_text
== -1)
463 objfile
->sect_index_text
= 0;
464 if (objfile
->sect_index_data
== -1)
465 objfile
->sect_index_data
= 0;
466 if (objfile
->sect_index_bss
== -1)
467 objfile
->sect_index_bss
= 0;
468 if (objfile
->sect_index_rodata
== -1)
469 objfile
->sect_index_rodata
= 0;
474 /* Parse the user's idea of an offset for dynamic linking, into our idea
475 of how to represent it for fast symbol reading. This is the default
476 version of the sym_fns.sym_offsets function for symbol readers that
477 don't need to do anything special. It allocates a section_offsets table
478 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
481 default_symfile_offsets (struct objfile
*objfile
,
482 struct section_addr_info
*addrs
)
486 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
487 objfile
->section_offsets
= (struct section_offsets
*)
488 obstack_alloc (&objfile
->psymbol_obstack
,
489 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
490 memset (objfile
->section_offsets
, 0,
491 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
493 /* Now calculate offsets for section that were specified by the
495 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
497 struct other_sections
*osp
;
499 osp
= &addrs
->other
[i
] ;
503 /* Record all sections in offsets */
504 /* The section_offsets in the objfile are here filled in using
506 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
509 /* Remember the bfd indexes for the .text, .data, .bss and
511 init_objfile_sect_indices (objfile
);
515 /* Process a symbol file, as either the main file or as a dynamically
518 OBJFILE is where the symbols are to be read from.
520 ADDRS is the list of section load addresses. If the user has given
521 an 'add-symbol-file' command, then this is the list of offsets and
522 addresses he or she provided as arguments to the command; or, if
523 we're handling a shared library, these are the actual addresses the
524 sections are loaded at, according to the inferior's dynamic linker
525 (as gleaned by GDB's shared library code). We convert each address
526 into an offset from the section VMA's as it appears in the object
527 file, and then call the file's sym_offsets function to convert this
528 into a format-specific offset table --- a `struct section_offsets'.
529 If ADDRS is non-zero, OFFSETS must be zero.
531 OFFSETS is a table of section offsets already in the right
532 format-specific representation. NUM_OFFSETS is the number of
533 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
534 assume this is the proper table the call to sym_offsets described
535 above would produce. Instead of calling sym_offsets, we just dump
536 it right into objfile->section_offsets. (When we're re-reading
537 symbols from an objfile, we don't have the original load address
538 list any more; all we have is the section offset table.) If
539 OFFSETS is non-zero, ADDRS must be zero.
541 MAINLINE is nonzero if this is the main symbol file, or zero if
542 it's an extra symbol file such as dynamically loaded code.
544 VERBO is nonzero if the caller has printed a verbose message about
545 the symbol reading (and complaints can be more terse about it). */
548 syms_from_objfile (struct objfile
*objfile
,
549 struct section_addr_info
*addrs
,
550 struct section_offsets
*offsets
,
555 struct section_addr_info
*local_addr
= NULL
;
556 struct cleanup
*old_chain
;
558 gdb_assert (! (addrs
&& offsets
));
560 init_entry_point_info (objfile
);
561 find_sym_fns (objfile
);
563 if (objfile
->sf
== NULL
)
564 return; /* No symbols. */
566 /* Make sure that partially constructed symbol tables will be cleaned up
567 if an error occurs during symbol reading. */
568 old_chain
= make_cleanup_free_objfile (objfile
);
570 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
571 list. We now establish the convention that an addr of zero means
572 no load address was specified. */
573 if (! addrs
&& ! offsets
)
576 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
577 make_cleanup (xfree
, local_addr
);
581 /* Now either addrs or offsets is non-zero. */
585 /* We will modify the main symbol table, make sure that all its users
586 will be cleaned up if an error occurs during symbol reading. */
587 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
589 /* Since no error yet, throw away the old symbol table. */
591 if (symfile_objfile
!= NULL
)
593 free_objfile (symfile_objfile
);
594 symfile_objfile
= NULL
;
597 /* Currently we keep symbols from the add-symbol-file command.
598 If the user wants to get rid of them, they should do "symbol-file"
599 without arguments first. Not sure this is the best behavior
602 (*objfile
->sf
->sym_new_init
) (objfile
);
605 /* Convert addr into an offset rather than an absolute address.
606 We find the lowest address of a loaded segment in the objfile,
607 and assume that <addr> is where that got loaded.
609 We no longer warn if the lowest section is not a text segment (as
610 happens for the PA64 port. */
611 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
613 asection
*lower_sect
;
615 CORE_ADDR lower_offset
;
618 /* Find lowest loadable section to be used as starting point for
619 continguous sections. FIXME!! won't work without call to find
620 .text first, but this assumes text is lowest section. */
621 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
622 if (lower_sect
== NULL
)
623 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
625 if (lower_sect
== NULL
)
626 warning ("no loadable sections found in added symbol-file %s",
629 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
630 warning ("Lowest section in %s is %s at %s",
632 bfd_section_name (objfile
->obfd
, lower_sect
),
633 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
634 if (lower_sect
!= NULL
)
635 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
639 /* Calculate offsets for the loadable sections.
640 FIXME! Sections must be in order of increasing loadable section
641 so that contiguous sections can use the lower-offset!!!
643 Adjust offsets if the segments are not contiguous.
644 If the section is contiguous, its offset should be set to
645 the offset of the highest loadable section lower than it
646 (the loadable section directly below it in memory).
647 this_offset = lower_offset = lower_addr - lower_orig_addr */
649 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
651 if (addrs
->other
[i
].addr
!= 0)
653 sect
= bfd_get_section_by_name (objfile
->obfd
,
654 addrs
->other
[i
].name
);
658 -= bfd_section_vma (objfile
->obfd
, sect
);
659 lower_offset
= addrs
->other
[i
].addr
;
660 /* This is the index used by BFD. */
661 addrs
->other
[i
].sectindex
= sect
->index
;
665 warning ("section %s not found in %s",
666 addrs
->other
[i
].name
,
668 addrs
->other
[i
].addr
= 0;
672 addrs
->other
[i
].addr
= lower_offset
;
676 /* Initialize symbol reading routines for this objfile, allow complaints to
677 appear for this new file, and record how verbose to be, then do the
678 initial symbol reading for this file. */
680 (*objfile
->sf
->sym_init
) (objfile
);
681 clear_complaints (&symfile_complaints
, 1, verbo
);
684 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
687 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
689 /* Just copy in the offset table directly as given to us. */
690 objfile
->num_sections
= num_offsets
;
691 objfile
->section_offsets
692 = ((struct section_offsets
*)
693 obstack_alloc (&objfile
->psymbol_obstack
, size
));
694 memcpy (objfile
->section_offsets
, offsets
, size
);
696 init_objfile_sect_indices (objfile
);
699 #ifndef DEPRECATED_IBM6000_TARGET
700 /* This is a SVR4/SunOS specific hack, I think. In any event, it
701 screws RS/6000. sym_offsets should be doing this sort of thing,
702 because it knows the mapping between bfd sections and
704 /* This is a hack. As far as I can tell, section offsets are not
705 target dependent. They are all set to addr with a couple of
706 exceptions. The exceptions are sysvr4 shared libraries, whose
707 offsets are kept in solib structures anyway and rs6000 xcoff
708 which handles shared libraries in a completely unique way.
710 Section offsets are built similarly, except that they are built
711 by adding addr in all cases because there is no clear mapping
712 from section_offsets into actual sections. Note that solib.c
713 has a different algorithm for finding section offsets.
715 These should probably all be collapsed into some target
716 independent form of shared library support. FIXME. */
720 struct obj_section
*s
;
722 /* Map section offsets in "addr" back to the object's
723 sections by comparing the section names with bfd's
724 section names. Then adjust the section address by
725 the offset. */ /* for gdb/13815 */
727 ALL_OBJFILE_OSECTIONS (objfile
, s
)
729 CORE_ADDR s_addr
= 0;
733 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
735 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
737 addrs
->other
[i
].name
) == 0)
738 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
740 s
->addr
-= s
->offset
;
742 s
->endaddr
-= s
->offset
;
743 s
->endaddr
+= s_addr
;
747 #endif /* not DEPRECATED_IBM6000_TARGET */
749 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
751 /* Don't allow char * to have a typename (else would get caddr_t).
752 Ditto void *. FIXME: Check whether this is now done by all the
753 symbol readers themselves (many of them now do), and if so remove
756 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
757 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
759 /* Mark the objfile has having had initial symbol read attempted. Note
760 that this does not mean we found any symbols... */
762 objfile
->flags
|= OBJF_SYMS
;
764 /* Discard cleanups as symbol reading was successful. */
766 discard_cleanups (old_chain
);
769 /* Perform required actions after either reading in the initial
770 symbols for a new objfile, or mapping in the symbols from a reusable
774 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
777 /* If this is the main symbol file we have to clean up all users of the
778 old main symbol file. Otherwise it is sufficient to fixup all the
779 breakpoints that may have been redefined by this symbol file. */
782 /* OK, make it the "real" symbol file. */
783 symfile_objfile
= objfile
;
785 clear_symtab_users ();
789 breakpoint_re_set ();
792 /* We're done reading the symbol file; finish off complaints. */
793 clear_complaints (&symfile_complaints
, 0, verbo
);
796 /* Process a symbol file, as either the main file or as a dynamically
799 NAME is the file name (which will be tilde-expanded and made
800 absolute herein) (but we don't free or modify NAME itself).
802 FROM_TTY says how verbose to be.
804 MAINLINE specifies whether this is the main symbol file, or whether
805 it's an extra symbol file such as dynamically loaded code.
807 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
808 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
811 Upon success, returns a pointer to the objfile that was added.
812 Upon failure, jumps back to command level (never returns). */
813 static struct objfile
*
814 symbol_file_add_with_addrs_or_offsets (char *name
, int from_tty
,
815 struct section_addr_info
*addrs
,
816 struct section_offsets
*offsets
,
818 int mainline
, int flags
)
820 struct objfile
*objfile
;
821 struct partial_symtab
*psymtab
;
824 struct section_addr_info
*orig_addrs
;
825 struct cleanup
*my_cleanups
;
827 /* Open a bfd for the file, and give user a chance to burp if we'd be
828 interactively wiping out any existing symbols. */
830 abfd
= symfile_bfd_open (name
);
832 if ((have_full_symbols () || have_partial_symbols ())
835 && !query ("Load new symbol table from \"%s\"? ", name
))
836 error ("Not confirmed.");
838 objfile
= allocate_objfile (abfd
, flags
);
840 orig_addrs
= alloc_section_addr_info (bfd_count_sections (abfd
));
841 my_cleanups
= make_cleanup (xfree
, orig_addrs
);
845 orig_addrs
->num_sections
= addrs
->num_sections
;
846 for (i
= 0; i
< addrs
->num_sections
; i
++)
847 orig_addrs
->other
[i
] = addrs
->other
[i
];
850 /* If the objfile uses a mapped symbol file, and we have a psymtab for
851 it, then skip reading any symbols at this time. */
853 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
855 /* We mapped in an existing symbol table file that already has had
856 initial symbol reading performed, so we can skip that part. Notify
857 the user that instead of reading the symbols, they have been mapped.
859 if (from_tty
|| info_verbose
)
861 printf_unfiltered ("Mapped symbols for %s...", name
);
863 gdb_flush (gdb_stdout
);
865 init_entry_point_info (objfile
);
866 find_sym_fns (objfile
);
870 /* We either created a new mapped symbol table, mapped an existing
871 symbol table file which has not had initial symbol reading
872 performed, or need to read an unmapped symbol table. */
873 if (from_tty
|| info_verbose
)
875 if (pre_add_symbol_hook
)
876 pre_add_symbol_hook (name
);
879 printf_unfiltered ("Reading symbols from %s...", name
);
881 gdb_flush (gdb_stdout
);
884 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
888 /* We now have at least a partial symbol table. Check to see if the
889 user requested that all symbols be read on initial access via either
890 the gdb startup command line or on a per symbol file basis. Expand
891 all partial symbol tables for this objfile if so. */
893 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
895 if (from_tty
|| info_verbose
)
897 printf_unfiltered ("expanding to full symbols...");
899 gdb_flush (gdb_stdout
);
902 for (psymtab
= objfile
->psymtabs
;
904 psymtab
= psymtab
->next
)
906 psymtab_to_symtab (psymtab
);
910 debugfile
= find_separate_debug_file (objfile
);
915 objfile
->separate_debug_objfile
916 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
920 objfile
->separate_debug_objfile
921 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
923 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
926 /* Put the separate debug object before the normal one, this is so that
927 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
928 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
933 if (!have_partial_symbols () && !have_full_symbols ())
936 printf_unfiltered ("(no debugging symbols found)...");
940 if (from_tty
|| info_verbose
)
942 if (post_add_symbol_hook
)
943 post_add_symbol_hook ();
946 printf_unfiltered ("done.\n");
950 /* We print some messages regardless of whether 'from_tty ||
951 info_verbose' is true, so make sure they go out at the right
953 gdb_flush (gdb_stdout
);
955 do_cleanups (my_cleanups
);
957 if (objfile
->sf
== NULL
)
958 return objfile
; /* No symbols. */
960 new_symfile_objfile (objfile
, mainline
, from_tty
);
962 if (target_new_objfile_hook
)
963 target_new_objfile_hook (objfile
);
969 /* Process a symbol file, as either the main file or as a dynamically
970 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
973 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
974 int mainline
, int flags
)
976 return symbol_file_add_with_addrs_or_offsets (name
, from_tty
, addrs
, 0, 0,
981 /* Call symbol_file_add() with default values and update whatever is
982 affected by the loading of a new main().
983 Used when the file is supplied in the gdb command line
984 and by some targets with special loading requirements.
985 The auxiliary function, symbol_file_add_main_1(), has the flags
986 argument for the switches that can only be specified in the symbol_file
990 symbol_file_add_main (char *args
, int from_tty
)
992 symbol_file_add_main_1 (args
, from_tty
, 0);
996 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
998 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1001 RESET_HP_UX_GLOBALS ();
1004 /* Getting new symbols may change our opinion about
1005 what is frameless. */
1006 reinit_frame_cache ();
1008 set_initial_language ();
1012 symbol_file_clear (int from_tty
)
1014 if ((have_full_symbols () || have_partial_symbols ())
1016 && !query ("Discard symbol table from `%s'? ",
1017 symfile_objfile
->name
))
1018 error ("Not confirmed.");
1019 free_all_objfiles ();
1021 /* solib descriptors may have handles to objfiles. Since their
1022 storage has just been released, we'd better wipe the solib
1023 descriptors as well.
1025 #if defined(SOLIB_RESTART)
1029 symfile_objfile
= NULL
;
1031 printf_unfiltered ("No symbol file now.\n");
1033 RESET_HP_UX_GLOBALS ();
1038 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1041 bfd_size_type debuglink_size
;
1042 unsigned long crc32
;
1047 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1052 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1054 contents
= xmalloc (debuglink_size
);
1055 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1056 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1058 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1059 crc_offset
= strlen (contents
) + 1;
1060 crc_offset
= (crc_offset
+ 3) & ~3;
1062 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1069 separate_debug_file_exists (const char *name
, unsigned long crc
)
1071 unsigned long file_crc
= 0;
1073 char buffer
[8*1024];
1076 fd
= open (name
, O_RDONLY
| O_BINARY
);
1080 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1081 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1085 return crc
== file_crc
;
1088 static char *debug_file_directory
= NULL
;
1090 #if ! defined (DEBUG_SUBDIRECTORY)
1091 #define DEBUG_SUBDIRECTORY ".debug"
1095 find_separate_debug_file (struct objfile
*objfile
)
1102 bfd_size_type debuglink_size
;
1103 unsigned long crc32
;
1106 basename
= get_debug_link_info (objfile
, &crc32
);
1108 if (basename
== NULL
)
1111 dir
= xstrdup (objfile
->name
);
1113 /* Strip off the final filename part, leaving the directory name,
1114 followed by a slash. Objfile names should always be absolute and
1115 tilde-expanded, so there should always be a slash in there
1117 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1119 if (IS_DIR_SEPARATOR (dir
[i
]))
1122 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1125 debugfile
= alloca (strlen (debug_file_directory
) + 1
1127 + strlen (DEBUG_SUBDIRECTORY
)
1132 /* First try in the same directory as the original file. */
1133 strcpy (debugfile
, dir
);
1134 strcat (debugfile
, basename
);
1136 if (separate_debug_file_exists (debugfile
, crc32
))
1140 return xstrdup (debugfile
);
1143 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1144 strcpy (debugfile
, dir
);
1145 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1146 strcat (debugfile
, "/");
1147 strcat (debugfile
, basename
);
1149 if (separate_debug_file_exists (debugfile
, crc32
))
1153 return xstrdup (debugfile
);
1156 /* Then try in the global debugfile directory. */
1157 strcpy (debugfile
, debug_file_directory
);
1158 strcat (debugfile
, "/");
1159 strcat (debugfile
, dir
);
1160 strcat (debugfile
, basename
);
1162 if (separate_debug_file_exists (debugfile
, crc32
))
1166 return xstrdup (debugfile
);
1175 /* This is the symbol-file command. Read the file, analyze its
1176 symbols, and add a struct symtab to a symtab list. The syntax of
1177 the command is rather bizarre--(1) buildargv implements various
1178 quoting conventions which are undocumented and have little or
1179 nothing in common with the way things are quoted (or not quoted)
1180 elsewhere in GDB, (2) options are used, which are not generally
1181 used in GDB (perhaps "set mapped on", "set readnow on" would be
1182 better), (3) the order of options matters, which is contrary to GNU
1183 conventions (because it is confusing and inconvenient). */
1184 /* Note: ezannoni 2000-04-17. This function used to have support for
1185 rombug (see remote-os9k.c). It consisted of a call to target_link()
1186 (target.c) to get the address of the text segment from the target,
1187 and pass that to symbol_file_add(). This is no longer supported. */
1190 symbol_file_command (char *args
, int from_tty
)
1194 struct cleanup
*cleanups
;
1195 int flags
= OBJF_USERLOADED
;
1201 symbol_file_clear (from_tty
);
1205 if ((argv
= buildargv (args
)) == NULL
)
1209 cleanups
= make_cleanup_freeargv (argv
);
1210 while (*argv
!= NULL
)
1212 if (strcmp (*argv
, "-mapped") == 0)
1213 flags
|= OBJF_MAPPED
;
1215 if (strcmp (*argv
, "-readnow") == 0)
1216 flags
|= OBJF_READNOW
;
1219 error ("unknown option `%s'", *argv
);
1224 symbol_file_add_main_1 (name
, from_tty
, flags
);
1231 error ("no symbol file name was specified");
1233 do_cleanups (cleanups
);
1237 /* Set the initial language.
1239 A better solution would be to record the language in the psymtab when reading
1240 partial symbols, and then use it (if known) to set the language. This would
1241 be a win for formats that encode the language in an easily discoverable place,
1242 such as DWARF. For stabs, we can jump through hoops looking for specially
1243 named symbols or try to intuit the language from the specific type of stabs
1244 we find, but we can't do that until later when we read in full symbols.
1248 set_initial_language (void)
1250 struct partial_symtab
*pst
;
1251 enum language lang
= language_unknown
;
1253 pst
= find_main_psymtab ();
1256 if (pst
->filename
!= NULL
)
1258 lang
= deduce_language_from_filename (pst
->filename
);
1260 if (lang
== language_unknown
)
1262 /* Make C the default language */
1265 set_language (lang
);
1266 expected_language
= current_language
; /* Don't warn the user */
1270 /* Open file specified by NAME and hand it off to BFD for preliminary
1271 analysis. Result is a newly initialized bfd *, which includes a newly
1272 malloc'd` copy of NAME (tilde-expanded and made absolute).
1273 In case of trouble, error() is called. */
1276 symfile_bfd_open (char *name
)
1280 char *absolute_name
;
1284 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1286 /* Look down path for it, allocate 2nd new malloc'd copy. */
1287 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1288 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1291 char *exename
= alloca (strlen (name
) + 5);
1292 strcat (strcpy (exename
, name
), ".exe");
1293 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1299 make_cleanup (xfree
, name
);
1300 perror_with_name (name
);
1302 xfree (name
); /* Free 1st new malloc'd copy */
1303 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1304 /* It'll be freed in free_objfile(). */
1306 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1310 make_cleanup (xfree
, name
);
1311 error ("\"%s\": can't open to read symbols: %s.", name
,
1312 bfd_errmsg (bfd_get_error ()));
1314 sym_bfd
->cacheable
= 1;
1316 if (!bfd_check_format (sym_bfd
, bfd_object
))
1318 /* FIXME: should be checking for errors from bfd_close (for one thing,
1319 on error it does not free all the storage associated with the
1321 bfd_close (sym_bfd
); /* This also closes desc */
1322 make_cleanup (xfree
, name
);
1323 error ("\"%s\": can't read symbols: %s.", name
,
1324 bfd_errmsg (bfd_get_error ()));
1329 /* Return the section index for the given section name. Return -1 if
1330 the section was not found. */
1332 get_section_index (struct objfile
*objfile
, char *section_name
)
1334 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1341 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1342 startup by the _initialize routine in each object file format reader,
1343 to register information about each format the the reader is prepared
1347 add_symtab_fns (struct sym_fns
*sf
)
1349 sf
->next
= symtab_fns
;
1354 /* Initialize to read symbols from the symbol file sym_bfd. It either
1355 returns or calls error(). The result is an initialized struct sym_fns
1356 in the objfile structure, that contains cached information about the
1360 find_sym_fns (struct objfile
*objfile
)
1363 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1364 char *our_target
= bfd_get_target (objfile
->obfd
);
1366 if (our_flavour
== bfd_target_srec_flavour
1367 || our_flavour
== bfd_target_ihex_flavour
1368 || our_flavour
== bfd_target_tekhex_flavour
)
1369 return; /* No symbols. */
1371 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1373 if (our_flavour
== sf
->sym_flavour
)
1379 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1380 bfd_get_target (objfile
->obfd
));
1383 /* This function runs the load command of our current target. */
1386 load_command (char *arg
, int from_tty
)
1389 arg
= get_exec_file (1);
1390 target_load (arg
, from_tty
);
1392 /* After re-loading the executable, we don't really know which
1393 overlays are mapped any more. */
1394 overlay_cache_invalid
= 1;
1397 /* This version of "load" should be usable for any target. Currently
1398 it is just used for remote targets, not inftarg.c or core files,
1399 on the theory that only in that case is it useful.
1401 Avoiding xmodem and the like seems like a win (a) because we don't have
1402 to worry about finding it, and (b) On VMS, fork() is very slow and so
1403 we don't want to run a subprocess. On the other hand, I'm not sure how
1404 performance compares. */
1406 static int download_write_size
= 512;
1407 static int validate_download
= 0;
1409 /* Callback service function for generic_load (bfd_map_over_sections). */
1412 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1414 bfd_size_type
*sum
= data
;
1416 *sum
+= bfd_get_section_size_before_reloc (asec
);
1419 /* Opaque data for load_section_callback. */
1420 struct load_section_data
{
1421 unsigned long load_offset
;
1422 unsigned long write_count
;
1423 unsigned long data_count
;
1424 bfd_size_type total_size
;
1427 /* Callback service function for generic_load (bfd_map_over_sections). */
1430 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1432 struct load_section_data
*args
= data
;
1434 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1436 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1440 struct cleanup
*old_chain
;
1441 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1442 bfd_size_type block_size
;
1444 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1447 if (download_write_size
> 0 && size
> download_write_size
)
1448 block_size
= download_write_size
;
1452 buffer
= xmalloc (size
);
1453 old_chain
= make_cleanup (xfree
, buffer
);
1455 /* Is this really necessary? I guess it gives the user something
1456 to look at during a long download. */
1457 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1458 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1460 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1466 bfd_size_type this_transfer
= size
- sent
;
1468 if (this_transfer
>= block_size
)
1469 this_transfer
= block_size
;
1470 len
= target_write_memory_partial (lma
, buffer
,
1471 this_transfer
, &err
);
1474 if (validate_download
)
1476 /* Broken memories and broken monitors manifest
1477 themselves here when bring new computers to
1478 life. This doubles already slow downloads. */
1479 /* NOTE: cagney/1999-10-18: A more efficient
1480 implementation might add a verify_memory()
1481 method to the target vector and then use
1482 that. remote.c could implement that method
1483 using the ``qCRC'' packet. */
1484 char *check
= xmalloc (len
);
1485 struct cleanup
*verify_cleanups
=
1486 make_cleanup (xfree
, check
);
1488 if (target_read_memory (lma
, check
, len
) != 0)
1489 error ("Download verify read failed at 0x%s",
1491 if (memcmp (buffer
, check
, len
) != 0)
1492 error ("Download verify compare failed at 0x%s",
1494 do_cleanups (verify_cleanups
);
1496 args
->data_count
+= len
;
1499 args
->write_count
+= 1;
1502 || (ui_load_progress_hook
!= NULL
1503 && ui_load_progress_hook (sect_name
, sent
)))
1504 error ("Canceled the download");
1506 if (show_load_progress
!= NULL
)
1507 show_load_progress (sect_name
, sent
, size
,
1508 args
->data_count
, args
->total_size
);
1510 while (sent
< size
);
1513 error ("Memory access error while loading section %s.", sect_name
);
1515 do_cleanups (old_chain
);
1521 generic_load (char *args
, int from_tty
)
1525 time_t start_time
, end_time
; /* Start and end times of download */
1527 struct cleanup
*old_cleanups
;
1529 struct load_section_data cbdata
;
1532 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1533 cbdata
.write_count
= 0; /* Number of writes needed. */
1534 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1535 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1537 /* Parse the input argument - the user can specify a load offset as
1538 a second argument. */
1539 filename
= xmalloc (strlen (args
) + 1);
1540 old_cleanups
= make_cleanup (xfree
, filename
);
1541 strcpy (filename
, args
);
1542 offptr
= strchr (filename
, ' ');
1547 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1548 if (offptr
== endptr
)
1549 error ("Invalid download offset:%s\n", offptr
);
1553 cbdata
.load_offset
= 0;
1555 /* Open the file for loading. */
1556 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1557 if (loadfile_bfd
== NULL
)
1559 perror_with_name (filename
);
1563 /* FIXME: should be checking for errors from bfd_close (for one thing,
1564 on error it does not free all the storage associated with the
1566 make_cleanup_bfd_close (loadfile_bfd
);
1568 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1570 error ("\"%s\" is not an object file: %s", filename
,
1571 bfd_errmsg (bfd_get_error ()));
1574 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1575 (void *) &cbdata
.total_size
);
1577 start_time
= time (NULL
);
1579 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1581 end_time
= time (NULL
);
1583 entry
= bfd_get_start_address (loadfile_bfd
);
1584 ui_out_text (uiout
, "Start address ");
1585 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1586 ui_out_text (uiout
, ", load size ");
1587 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1588 ui_out_text (uiout
, "\n");
1589 /* We were doing this in remote-mips.c, I suspect it is right
1590 for other targets too. */
1593 /* FIXME: are we supposed to call symbol_file_add or not? According
1594 to a comment from remote-mips.c (where a call to symbol_file_add
1595 was commented out), making the call confuses GDB if more than one
1596 file is loaded in. Some targets do (e.g., remote-vx.c) but
1597 others don't (or didn't - perhaphs they have all been deleted). */
1599 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1600 cbdata
.write_count
, end_time
- start_time
);
1602 do_cleanups (old_cleanups
);
1605 /* Report how fast the transfer went. */
1607 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1608 replaced by print_transfer_performance (with a very different
1609 function signature). */
1612 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1615 print_transfer_performance (gdb_stdout
, data_count
,
1616 end_time
- start_time
, 0);
1620 print_transfer_performance (struct ui_file
*stream
,
1621 unsigned long data_count
,
1622 unsigned long write_count
,
1623 unsigned long time_count
)
1625 ui_out_text (uiout
, "Transfer rate: ");
1628 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1629 (data_count
* 8) / time_count
);
1630 ui_out_text (uiout
, " bits/sec");
1634 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1635 ui_out_text (uiout
, " bits in <1 sec");
1637 if (write_count
> 0)
1639 ui_out_text (uiout
, ", ");
1640 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1641 ui_out_text (uiout
, " bytes/write");
1643 ui_out_text (uiout
, ".\n");
1646 /* This function allows the addition of incrementally linked object files.
1647 It does not modify any state in the target, only in the debugger. */
1648 /* Note: ezannoni 2000-04-13 This function/command used to have a
1649 special case syntax for the rombug target (Rombug is the boot
1650 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1651 rombug case, the user doesn't need to supply a text address,
1652 instead a call to target_link() (in target.c) would supply the
1653 value to use. We are now discontinuing this type of ad hoc syntax. */
1656 add_symbol_file_command (char *args
, int from_tty
)
1658 char *filename
= NULL
;
1659 int flags
= OBJF_USERLOADED
;
1661 int expecting_option
= 0;
1662 int section_index
= 0;
1666 int expecting_sec_name
= 0;
1667 int expecting_sec_addr
= 0;
1675 struct section_addr_info
*section_addrs
;
1676 struct sect_opt
*sect_opts
= NULL
;
1677 size_t num_sect_opts
= 0;
1678 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1681 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1682 * sizeof (struct sect_opt
));
1687 error ("add-symbol-file takes a file name and an address");
1689 /* Make a copy of the string that we can safely write into. */
1690 args
= xstrdup (args
);
1692 while (*args
!= '\000')
1694 /* Any leading spaces? */
1695 while (isspace (*args
))
1698 /* Point arg to the beginning of the argument. */
1701 /* Move args pointer over the argument. */
1702 while ((*args
!= '\000') && !isspace (*args
))
1705 /* If there are more arguments, terminate arg and
1707 if (*args
!= '\000')
1710 /* Now process the argument. */
1713 /* The first argument is the file name. */
1714 filename
= tilde_expand (arg
);
1715 make_cleanup (xfree
, filename
);
1720 /* The second argument is always the text address at which
1721 to load the program. */
1722 sect_opts
[section_index
].name
= ".text";
1723 sect_opts
[section_index
].value
= arg
;
1724 if (++section_index
> num_sect_opts
)
1727 sect_opts
= ((struct sect_opt
*)
1728 xrealloc (sect_opts
,
1730 * sizeof (struct sect_opt
)));
1735 /* It's an option (starting with '-') or it's an argument
1740 if (strcmp (arg
, "-mapped") == 0)
1741 flags
|= OBJF_MAPPED
;
1743 if (strcmp (arg
, "-readnow") == 0)
1744 flags
|= OBJF_READNOW
;
1746 if (strcmp (arg
, "-s") == 0)
1748 expecting_sec_name
= 1;
1749 expecting_sec_addr
= 1;
1754 if (expecting_sec_name
)
1756 sect_opts
[section_index
].name
= arg
;
1757 expecting_sec_name
= 0;
1760 if (expecting_sec_addr
)
1762 sect_opts
[section_index
].value
= arg
;
1763 expecting_sec_addr
= 0;
1764 if (++section_index
> num_sect_opts
)
1767 sect_opts
= ((struct sect_opt
*)
1768 xrealloc (sect_opts
,
1770 * sizeof (struct sect_opt
)));
1774 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1780 /* Print the prompt for the query below. And save the arguments into
1781 a sect_addr_info structure to be passed around to other
1782 functions. We have to split this up into separate print
1783 statements because local_hex_string returns a local static
1786 printf_unfiltered ("add symbol table from file \"%s\" at\n", filename
);
1787 section_addrs
= alloc_section_addr_info (section_index
);
1788 make_cleanup (xfree
, section_addrs
);
1789 for (i
= 0; i
< section_index
; i
++)
1792 char *val
= sect_opts
[i
].value
;
1793 char *sec
= sect_opts
[i
].name
;
1795 addr
= parse_and_eval_address (val
);
1797 /* Here we store the section offsets in the order they were
1798 entered on the command line. */
1799 section_addrs
->other
[sec_num
].name
= sec
;
1800 section_addrs
->other
[sec_num
].addr
= addr
;
1801 printf_unfiltered ("\t%s_addr = %s\n",
1803 local_hex_string ((unsigned long)addr
));
1806 /* The object's sections are initialized when a
1807 call is made to build_objfile_section_table (objfile).
1808 This happens in reread_symbols.
1809 At this point, we don't know what file type this is,
1810 so we can't determine what section names are valid. */
1813 if (from_tty
&& (!query ("%s", "")))
1814 error ("Not confirmed.");
1816 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
1818 /* Getting new symbols may change our opinion about what is
1820 reinit_frame_cache ();
1821 do_cleanups (my_cleanups
);
1825 add_shared_symbol_files_command (char *args
, int from_tty
)
1827 #ifdef ADD_SHARED_SYMBOL_FILES
1828 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1830 error ("This command is not available in this configuration of GDB.");
1834 /* Re-read symbols if a symbol-file has changed. */
1836 reread_symbols (void)
1838 struct objfile
*objfile
;
1841 struct stat new_statbuf
;
1844 /* With the addition of shared libraries, this should be modified,
1845 the load time should be saved in the partial symbol tables, since
1846 different tables may come from different source files. FIXME.
1847 This routine should then walk down each partial symbol table
1848 and see if the symbol table that it originates from has been changed */
1850 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1854 #ifdef DEPRECATED_IBM6000_TARGET
1855 /* If this object is from a shared library, then you should
1856 stat on the library name, not member name. */
1858 if (objfile
->obfd
->my_archive
)
1859 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1862 res
= stat (objfile
->name
, &new_statbuf
);
1865 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1866 printf_unfiltered ("`%s' has disappeared; keeping its symbols.\n",
1870 new_modtime
= new_statbuf
.st_mtime
;
1871 if (new_modtime
!= objfile
->mtime
)
1873 struct cleanup
*old_cleanups
;
1874 struct section_offsets
*offsets
;
1876 char *obfd_filename
;
1878 printf_unfiltered ("`%s' has changed; re-reading symbols.\n",
1881 /* There are various functions like symbol_file_add,
1882 symfile_bfd_open, syms_from_objfile, etc., which might
1883 appear to do what we want. But they have various other
1884 effects which we *don't* want. So we just do stuff
1885 ourselves. We don't worry about mapped files (for one thing,
1886 any mapped file will be out of date). */
1888 /* If we get an error, blow away this objfile (not sure if
1889 that is the correct response for things like shared
1891 old_cleanups
= make_cleanup_free_objfile (objfile
);
1892 /* We need to do this whenever any symbols go away. */
1893 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1895 /* Clean up any state BFD has sitting around. We don't need
1896 to close the descriptor but BFD lacks a way of closing the
1897 BFD without closing the descriptor. */
1898 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1899 if (!bfd_close (objfile
->obfd
))
1900 error ("Can't close BFD for %s: %s", objfile
->name
,
1901 bfd_errmsg (bfd_get_error ()));
1902 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1903 if (objfile
->obfd
== NULL
)
1904 error ("Can't open %s to read symbols.", objfile
->name
);
1905 /* bfd_openr sets cacheable to true, which is what we want. */
1906 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1907 error ("Can't read symbols from %s: %s.", objfile
->name
,
1908 bfd_errmsg (bfd_get_error ()));
1910 /* Save the offsets, we will nuke them with the rest of the
1912 num_offsets
= objfile
->num_sections
;
1913 offsets
= ((struct section_offsets
*)
1914 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
1915 memcpy (offsets
, objfile
->section_offsets
,
1916 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1918 /* Nuke all the state that we will re-read. Much of the following
1919 code which sets things to NULL really is necessary to tell
1920 other parts of GDB that there is nothing currently there. */
1922 /* FIXME: Do we have to free a whole linked list, or is this
1924 if (objfile
->global_psymbols
.list
)
1925 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1926 memset (&objfile
->global_psymbols
, 0,
1927 sizeof (objfile
->global_psymbols
));
1928 if (objfile
->static_psymbols
.list
)
1929 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1930 memset (&objfile
->static_psymbols
, 0,
1931 sizeof (objfile
->static_psymbols
));
1933 /* Free the obstacks for non-reusable objfiles */
1934 bcache_xfree (objfile
->psymbol_cache
);
1935 objfile
->psymbol_cache
= bcache_xmalloc ();
1936 bcache_xfree (objfile
->macro_cache
);
1937 objfile
->macro_cache
= bcache_xmalloc ();
1938 if (objfile
->demangled_names_hash
!= NULL
)
1940 htab_delete (objfile
->demangled_names_hash
);
1941 objfile
->demangled_names_hash
= NULL
;
1943 obstack_free (&objfile
->psymbol_obstack
, 0);
1944 obstack_free (&objfile
->symbol_obstack
, 0);
1945 obstack_free (&objfile
->type_obstack
, 0);
1946 objfile
->sections
= NULL
;
1947 objfile
->symtabs
= NULL
;
1948 objfile
->psymtabs
= NULL
;
1949 objfile
->free_psymtabs
= NULL
;
1950 objfile
->msymbols
= NULL
;
1951 objfile
->sym_private
= NULL
;
1952 objfile
->minimal_symbol_count
= 0;
1953 memset (&objfile
->msymbol_hash
, 0,
1954 sizeof (objfile
->msymbol_hash
));
1955 memset (&objfile
->msymbol_demangled_hash
, 0,
1956 sizeof (objfile
->msymbol_demangled_hash
));
1957 objfile
->fundamental_types
= NULL
;
1958 clear_objfile_data (objfile
);
1959 if (objfile
->sf
!= NULL
)
1961 (*objfile
->sf
->sym_finish
) (objfile
);
1964 /* We never make this a mapped file. */
1966 /* obstack_specify_allocation also initializes the obstack so
1968 objfile
->psymbol_cache
= bcache_xmalloc ();
1969 objfile
->macro_cache
= bcache_xmalloc ();
1970 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1972 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1974 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1976 if (build_objfile_section_table (objfile
))
1978 error ("Can't find the file sections in `%s': %s",
1979 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1981 terminate_minimal_symbol_table (objfile
);
1983 /* We use the same section offsets as from last time. I'm not
1984 sure whether that is always correct for shared libraries. */
1985 objfile
->section_offsets
= (struct section_offsets
*)
1986 obstack_alloc (&objfile
->psymbol_obstack
,
1987 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1988 memcpy (objfile
->section_offsets
, offsets
,
1989 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1990 objfile
->num_sections
= num_offsets
;
1992 /* What the hell is sym_new_init for, anyway? The concept of
1993 distinguishing between the main file and additional files
1994 in this way seems rather dubious. */
1995 if (objfile
== symfile_objfile
)
1997 (*objfile
->sf
->sym_new_init
) (objfile
);
1999 RESET_HP_UX_GLOBALS ();
2003 (*objfile
->sf
->sym_init
) (objfile
);
2004 clear_complaints (&symfile_complaints
, 1, 1);
2005 /* The "mainline" parameter is a hideous hack; I think leaving it
2006 zero is OK since dbxread.c also does what it needs to do if
2007 objfile->global_psymbols.size is 0. */
2008 (*objfile
->sf
->sym_read
) (objfile
, 0);
2009 if (!have_partial_symbols () && !have_full_symbols ())
2012 printf_unfiltered ("(no debugging symbols found)\n");
2015 objfile
->flags
|= OBJF_SYMS
;
2017 /* We're done reading the symbol file; finish off complaints. */
2018 clear_complaints (&symfile_complaints
, 0, 1);
2020 /* Getting new symbols may change our opinion about what is
2023 reinit_frame_cache ();
2025 /* Discard cleanups as symbol reading was successful. */
2026 discard_cleanups (old_cleanups
);
2028 /* If the mtime has changed between the time we set new_modtime
2029 and now, we *want* this to be out of date, so don't call stat
2031 objfile
->mtime
= new_modtime
;
2033 reread_separate_symbols (objfile
);
2039 clear_symtab_users ();
2043 /* Handle separate debug info for OBJFILE, which has just been
2045 - If we had separate debug info before, but now we don't, get rid
2046 of the separated objfile.
2047 - If we didn't have separated debug info before, but now we do,
2048 read in the new separated debug info file.
2049 - If the debug link points to a different file, toss the old one
2050 and read the new one.
2051 This function does *not* handle the case where objfile is still
2052 using the same separate debug info file, but that file's timestamp
2053 has changed. That case should be handled by the loop in
2054 reread_symbols already. */
2056 reread_separate_symbols (struct objfile
*objfile
)
2059 unsigned long crc32
;
2061 /* Does the updated objfile's debug info live in a
2063 debug_file
= find_separate_debug_file (objfile
);
2065 if (objfile
->separate_debug_objfile
)
2067 /* There are two cases where we need to get rid of
2068 the old separated debug info objfile:
2069 - if the new primary objfile doesn't have
2070 separated debug info, or
2071 - if the new primary objfile has separate debug
2072 info, but it's under a different filename.
2074 If the old and new objfiles both have separate
2075 debug info, under the same filename, then we're
2076 okay --- if the separated file's contents have
2077 changed, we will have caught that when we
2078 visited it in this function's outermost
2081 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2082 free_objfile (objfile
->separate_debug_objfile
);
2085 /* If the new objfile has separate debug info, and we
2086 haven't loaded it already, do so now. */
2088 && ! objfile
->separate_debug_objfile
)
2090 /* Use the same section offset table as objfile itself.
2091 Preserve the flags from objfile that make sense. */
2092 objfile
->separate_debug_objfile
2093 = (symbol_file_add_with_addrs_or_offsets
2095 info_verbose
, /* from_tty: Don't override the default. */
2096 0, /* No addr table. */
2097 objfile
->section_offsets
, objfile
->num_sections
,
2098 0, /* Not mainline. See comments about this above. */
2099 objfile
->flags
& (OBJF_MAPPED
| OBJF_REORDERED
2100 | OBJF_SHARED
| OBJF_READNOW
2101 | OBJF_USERLOADED
)));
2102 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2118 static filename_language
*filename_language_table
;
2119 static int fl_table_size
, fl_table_next
;
2122 add_filename_language (char *ext
, enum language lang
)
2124 if (fl_table_next
>= fl_table_size
)
2126 fl_table_size
+= 10;
2127 filename_language_table
=
2128 xrealloc (filename_language_table
,
2129 fl_table_size
* sizeof (*filename_language_table
));
2132 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2133 filename_language_table
[fl_table_next
].lang
= lang
;
2137 static char *ext_args
;
2140 set_ext_lang_command (char *args
, int from_tty
)
2143 char *cp
= ext_args
;
2146 /* First arg is filename extension, starting with '.' */
2148 error ("'%s': Filename extension must begin with '.'", ext_args
);
2150 /* Find end of first arg. */
2151 while (*cp
&& !isspace (*cp
))
2155 error ("'%s': two arguments required -- filename extension and language",
2158 /* Null-terminate first arg */
2161 /* Find beginning of second arg, which should be a source language. */
2162 while (*cp
&& isspace (*cp
))
2166 error ("'%s': two arguments required -- filename extension and language",
2169 /* Lookup the language from among those we know. */
2170 lang
= language_enum (cp
);
2172 /* Now lookup the filename extension: do we already know it? */
2173 for (i
= 0; i
< fl_table_next
; i
++)
2174 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2177 if (i
>= fl_table_next
)
2179 /* new file extension */
2180 add_filename_language (ext_args
, lang
);
2184 /* redefining a previously known filename extension */
2187 /* query ("Really make files of type %s '%s'?", */
2188 /* ext_args, language_str (lang)); */
2190 xfree (filename_language_table
[i
].ext
);
2191 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2192 filename_language_table
[i
].lang
= lang
;
2197 info_ext_lang_command (char *args
, int from_tty
)
2201 printf_filtered ("Filename extensions and the languages they represent:");
2202 printf_filtered ("\n\n");
2203 for (i
= 0; i
< fl_table_next
; i
++)
2204 printf_filtered ("\t%s\t- %s\n",
2205 filename_language_table
[i
].ext
,
2206 language_str (filename_language_table
[i
].lang
));
2210 init_filename_language_table (void)
2212 if (fl_table_size
== 0) /* protect against repetition */
2216 filename_language_table
=
2217 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2218 add_filename_language (".c", language_c
);
2219 add_filename_language (".C", language_cplus
);
2220 add_filename_language (".cc", language_cplus
);
2221 add_filename_language (".cp", language_cplus
);
2222 add_filename_language (".cpp", language_cplus
);
2223 add_filename_language (".cxx", language_cplus
);
2224 add_filename_language (".c++", language_cplus
);
2225 add_filename_language (".java", language_java
);
2226 add_filename_language (".class", language_java
);
2227 add_filename_language (".m", language_objc
);
2228 add_filename_language (".f", language_fortran
);
2229 add_filename_language (".F", language_fortran
);
2230 add_filename_language (".s", language_asm
);
2231 add_filename_language (".S", language_asm
);
2232 add_filename_language (".pas", language_pascal
);
2233 add_filename_language (".p", language_pascal
);
2234 add_filename_language (".pp", language_pascal
);
2239 deduce_language_from_filename (char *filename
)
2244 if (filename
!= NULL
)
2245 if ((cp
= strrchr (filename
, '.')) != NULL
)
2246 for (i
= 0; i
< fl_table_next
; i
++)
2247 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2248 return filename_language_table
[i
].lang
;
2250 return language_unknown
;
2255 Allocate and partly initialize a new symbol table. Return a pointer
2256 to it. error() if no space.
2258 Caller must set these fields:
2264 possibly free_named_symtabs (symtab->filename);
2268 allocate_symtab (char *filename
, struct objfile
*objfile
)
2270 struct symtab
*symtab
;
2272 symtab
= (struct symtab
*)
2273 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
2274 memset (symtab
, 0, sizeof (*symtab
));
2275 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2276 &objfile
->symbol_obstack
);
2277 symtab
->fullname
= NULL
;
2278 symtab
->language
= deduce_language_from_filename (filename
);
2279 symtab
->debugformat
= obsavestring ("unknown", 7,
2280 &objfile
->symbol_obstack
);
2282 /* Hook it to the objfile it comes from */
2284 symtab
->objfile
= objfile
;
2285 symtab
->next
= objfile
->symtabs
;
2286 objfile
->symtabs
= symtab
;
2288 /* FIXME: This should go away. It is only defined for the Z8000,
2289 and the Z8000 definition of this macro doesn't have anything to
2290 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2291 here for convenience. */
2292 #ifdef INIT_EXTRA_SYMTAB_INFO
2293 INIT_EXTRA_SYMTAB_INFO (symtab
);
2299 struct partial_symtab
*
2300 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2302 struct partial_symtab
*psymtab
;
2304 if (objfile
->free_psymtabs
)
2306 psymtab
= objfile
->free_psymtabs
;
2307 objfile
->free_psymtabs
= psymtab
->next
;
2310 psymtab
= (struct partial_symtab
*)
2311 obstack_alloc (&objfile
->psymbol_obstack
,
2312 sizeof (struct partial_symtab
));
2314 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2315 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2316 &objfile
->psymbol_obstack
);
2317 psymtab
->symtab
= NULL
;
2319 /* Prepend it to the psymtab list for the objfile it belongs to.
2320 Psymtabs are searched in most recent inserted -> least recent
2323 psymtab
->objfile
= objfile
;
2324 psymtab
->next
= objfile
->psymtabs
;
2325 objfile
->psymtabs
= psymtab
;
2328 struct partial_symtab
**prev_pst
;
2329 psymtab
->objfile
= objfile
;
2330 psymtab
->next
= NULL
;
2331 prev_pst
= &(objfile
->psymtabs
);
2332 while ((*prev_pst
) != NULL
)
2333 prev_pst
= &((*prev_pst
)->next
);
2334 (*prev_pst
) = psymtab
;
2342 discard_psymtab (struct partial_symtab
*pst
)
2344 struct partial_symtab
**prev_pst
;
2347 Empty psymtabs happen as a result of header files which don't
2348 have any symbols in them. There can be a lot of them. But this
2349 check is wrong, in that a psymtab with N_SLINE entries but
2350 nothing else is not empty, but we don't realize that. Fixing
2351 that without slowing things down might be tricky. */
2353 /* First, snip it out of the psymtab chain */
2355 prev_pst
= &(pst
->objfile
->psymtabs
);
2356 while ((*prev_pst
) != pst
)
2357 prev_pst
= &((*prev_pst
)->next
);
2358 (*prev_pst
) = pst
->next
;
2360 /* Next, put it on a free list for recycling */
2362 pst
->next
= pst
->objfile
->free_psymtabs
;
2363 pst
->objfile
->free_psymtabs
= pst
;
2367 /* Reset all data structures in gdb which may contain references to symbol
2371 clear_symtab_users (void)
2373 /* Someday, we should do better than this, by only blowing away
2374 the things that really need to be blown. */
2375 clear_value_history ();
2377 clear_internalvars ();
2378 breakpoint_re_set ();
2379 set_default_breakpoint (0, 0, 0, 0);
2380 clear_current_source_symtab_and_line ();
2381 clear_pc_function_cache ();
2382 if (target_new_objfile_hook
)
2383 target_new_objfile_hook (NULL
);
2387 clear_symtab_users_cleanup (void *ignore
)
2389 clear_symtab_users ();
2392 /* clear_symtab_users_once:
2394 This function is run after symbol reading, or from a cleanup.
2395 If an old symbol table was obsoleted, the old symbol table
2396 has been blown away, but the other GDB data structures that may
2397 reference it have not yet been cleared or re-directed. (The old
2398 symtab was zapped, and the cleanup queued, in free_named_symtab()
2401 This function can be queued N times as a cleanup, or called
2402 directly; it will do all the work the first time, and then will be a
2403 no-op until the next time it is queued. This works by bumping a
2404 counter at queueing time. Much later when the cleanup is run, or at
2405 the end of symbol processing (in case the cleanup is discarded), if
2406 the queued count is greater than the "done-count", we do the work
2407 and set the done-count to the queued count. If the queued count is
2408 less than or equal to the done-count, we just ignore the call. This
2409 is needed because reading a single .o file will often replace many
2410 symtabs (one per .h file, for example), and we don't want to reset
2411 the breakpoints N times in the user's face.
2413 The reason we both queue a cleanup, and call it directly after symbol
2414 reading, is because the cleanup protects us in case of errors, but is
2415 discarded if symbol reading is successful. */
2418 /* FIXME: As free_named_symtabs is currently a big noop this function
2419 is no longer needed. */
2420 static void clear_symtab_users_once (void);
2422 static int clear_symtab_users_queued
;
2423 static int clear_symtab_users_done
;
2426 clear_symtab_users_once (void)
2428 /* Enforce once-per-`do_cleanups'-semantics */
2429 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2431 clear_symtab_users_done
= clear_symtab_users_queued
;
2433 clear_symtab_users ();
2437 /* Delete the specified psymtab, and any others that reference it. */
2440 cashier_psymtab (struct partial_symtab
*pst
)
2442 struct partial_symtab
*ps
, *pprev
= NULL
;
2445 /* Find its previous psymtab in the chain */
2446 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2455 /* Unhook it from the chain. */
2456 if (ps
== pst
->objfile
->psymtabs
)
2457 pst
->objfile
->psymtabs
= ps
->next
;
2459 pprev
->next
= ps
->next
;
2461 /* FIXME, we can't conveniently deallocate the entries in the
2462 partial_symbol lists (global_psymbols/static_psymbols) that
2463 this psymtab points to. These just take up space until all
2464 the psymtabs are reclaimed. Ditto the dependencies list and
2465 filename, which are all in the psymbol_obstack. */
2467 /* We need to cashier any psymtab that has this one as a dependency... */
2469 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2471 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2473 if (ps
->dependencies
[i
] == pst
)
2475 cashier_psymtab (ps
);
2476 goto again
; /* Must restart, chain has been munged. */
2483 /* If a symtab or psymtab for filename NAME is found, free it along
2484 with any dependent breakpoints, displays, etc.
2485 Used when loading new versions of object modules with the "add-file"
2486 command. This is only called on the top-level symtab or psymtab's name;
2487 it is not called for subsidiary files such as .h files.
2489 Return value is 1 if we blew away the environment, 0 if not.
2490 FIXME. The return value appears to never be used.
2492 FIXME. I think this is not the best way to do this. We should
2493 work on being gentler to the environment while still cleaning up
2494 all stray pointers into the freed symtab. */
2497 free_named_symtabs (char *name
)
2500 /* FIXME: With the new method of each objfile having it's own
2501 psymtab list, this function needs serious rethinking. In particular,
2502 why was it ever necessary to toss psymtabs with specific compilation
2503 unit filenames, as opposed to all psymtabs from a particular symbol
2505 Well, the answer is that some systems permit reloading of particular
2506 compilation units. We want to blow away any old info about these
2507 compilation units, regardless of which objfiles they arrived in. --gnu. */
2510 struct symtab
*prev
;
2511 struct partial_symtab
*ps
;
2512 struct blockvector
*bv
;
2515 /* We only wack things if the symbol-reload switch is set. */
2516 if (!symbol_reloading
)
2519 /* Some symbol formats have trouble providing file names... */
2520 if (name
== 0 || *name
== '\0')
2523 /* Look for a psymtab with the specified name. */
2526 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2528 if (strcmp (name
, ps
->filename
) == 0)
2530 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2531 goto again2
; /* Must restart, chain has been munged */
2535 /* Look for a symtab with the specified name. */
2537 for (s
= symtab_list
; s
; s
= s
->next
)
2539 if (strcmp (name
, s
->filename
) == 0)
2546 if (s
== symtab_list
)
2547 symtab_list
= s
->next
;
2549 prev
->next
= s
->next
;
2551 /* For now, queue a delete for all breakpoints, displays, etc., whether
2552 or not they depend on the symtab being freed. This should be
2553 changed so that only those data structures affected are deleted. */
2555 /* But don't delete anything if the symtab is empty.
2556 This test is necessary due to a bug in "dbxread.c" that
2557 causes empty symtabs to be created for N_SO symbols that
2558 contain the pathname of the object file. (This problem
2559 has been fixed in GDB 3.9x). */
2561 bv
= BLOCKVECTOR (s
);
2562 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2563 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2564 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2566 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2568 clear_symtab_users_queued
++;
2569 make_cleanup (clear_symtab_users_once
, 0);
2574 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2582 /* It is still possible that some breakpoints will be affected
2583 even though no symtab was found, since the file might have
2584 been compiled without debugging, and hence not be associated
2585 with a symtab. In order to handle this correctly, we would need
2586 to keep a list of text address ranges for undebuggable files.
2587 For now, we do nothing, since this is a fairly obscure case. */
2591 /* FIXME, what about the minimal symbol table? */
2598 /* Allocate and partially fill a partial symtab. It will be
2599 completely filled at the end of the symbol list.
2601 FILENAME is the name of the symbol-file we are reading from. */
2603 struct partial_symtab
*
2604 start_psymtab_common (struct objfile
*objfile
,
2605 struct section_offsets
*section_offsets
, char *filename
,
2606 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2607 struct partial_symbol
**static_syms
)
2609 struct partial_symtab
*psymtab
;
2611 psymtab
= allocate_psymtab (filename
, objfile
);
2612 psymtab
->section_offsets
= section_offsets
;
2613 psymtab
->textlow
= textlow
;
2614 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2615 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2616 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2620 /* Add a symbol with a long value to a psymtab.
2621 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2622 Return the partial symbol that has been added. */
2624 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2625 symbol is so that callers can get access to the symbol's demangled
2626 name, which they don't have any cheap way to determine otherwise.
2627 (Currenly, dwarf2read.c is the only file who uses that information,
2628 though it's possible that other readers might in the future.)
2629 Elena wasn't thrilled about that, and I don't blame her, but we
2630 couldn't come up with a better way to get that information. If
2631 it's needed in other situations, we could consider breaking up
2632 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2635 const struct partial_symbol
*
2636 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2637 enum address_class
class,
2638 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2639 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2640 enum language language
, struct objfile
*objfile
)
2642 struct partial_symbol
*psym
;
2643 char *buf
= alloca (namelength
+ 1);
2644 /* psymbol is static so that there will be no uninitialized gaps in the
2645 structure which might contain random data, causing cache misses in
2647 static struct partial_symbol psymbol
;
2649 /* Create local copy of the partial symbol */
2650 memcpy (buf
, name
, namelength
);
2651 buf
[namelength
] = '\0';
2652 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2655 SYMBOL_VALUE (&psymbol
) = val
;
2659 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2661 SYMBOL_SECTION (&psymbol
) = 0;
2662 SYMBOL_LANGUAGE (&psymbol
) = language
;
2663 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2664 PSYMBOL_CLASS (&psymbol
) = class;
2666 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2668 /* Stash the partial symbol away in the cache */
2669 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2670 objfile
->psymbol_cache
);
2672 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2673 if (list
->next
>= list
->list
+ list
->size
)
2675 extend_psymbol_list (list
, objfile
);
2677 *list
->next
++ = psym
;
2678 OBJSTAT (objfile
, n_psyms
++);
2683 /* Add a symbol with a long value to a psymtab. This differs from
2684 * add_psymbol_to_list above in taking both a mangled and a demangled
2688 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2689 int dem_namelength
, domain_enum domain
,
2690 enum address_class
class,
2691 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2692 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2693 enum language language
,
2694 struct objfile
*objfile
)
2696 struct partial_symbol
*psym
;
2697 char *buf
= alloca (namelength
+ 1);
2698 /* psymbol is static so that there will be no uninitialized gaps in the
2699 structure which might contain random data, causing cache misses in
2701 static struct partial_symbol psymbol
;
2703 /* Create local copy of the partial symbol */
2705 memcpy (buf
, name
, namelength
);
2706 buf
[namelength
] = '\0';
2707 DEPRECATED_SYMBOL_NAME (&psymbol
) = deprecated_bcache (buf
, namelength
+ 1,
2708 objfile
->psymbol_cache
);
2710 buf
= alloca (dem_namelength
+ 1);
2711 memcpy (buf
, dem_name
, dem_namelength
);
2712 buf
[dem_namelength
] = '\0';
2717 case language_cplus
:
2718 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2719 deprecated_bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2721 /* FIXME What should be done for the default case? Ignoring for now. */
2724 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2727 SYMBOL_VALUE (&psymbol
) = val
;
2731 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2733 SYMBOL_SECTION (&psymbol
) = 0;
2734 SYMBOL_LANGUAGE (&psymbol
) = language
;
2735 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2736 PSYMBOL_CLASS (&psymbol
) = class;
2737 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2739 /* Stash the partial symbol away in the cache */
2740 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2741 objfile
->psymbol_cache
);
2743 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2744 if (list
->next
>= list
->list
+ list
->size
)
2746 extend_psymbol_list (list
, objfile
);
2748 *list
->next
++ = psym
;
2749 OBJSTAT (objfile
, n_psyms
++);
2752 /* Initialize storage for partial symbols. */
2755 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2757 /* Free any previously allocated psymbol lists. */
2759 if (objfile
->global_psymbols
.list
)
2761 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
2763 if (objfile
->static_psymbols
.list
)
2765 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
2768 /* Current best guess is that approximately a twentieth
2769 of the total symbols (in a debugging file) are global or static
2772 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2773 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2775 if (objfile
->global_psymbols
.size
> 0)
2777 objfile
->global_psymbols
.next
=
2778 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2779 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2780 * sizeof (struct partial_symbol
*)));
2782 if (objfile
->static_psymbols
.size
> 0)
2784 objfile
->static_psymbols
.next
=
2785 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2786 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2787 * sizeof (struct partial_symbol
*)));
2792 The following code implements an abstraction for debugging overlay sections.
2794 The target model is as follows:
2795 1) The gnu linker will permit multiple sections to be mapped into the
2796 same VMA, each with its own unique LMA (or load address).
2797 2) It is assumed that some runtime mechanism exists for mapping the
2798 sections, one by one, from the load address into the VMA address.
2799 3) This code provides a mechanism for gdb to keep track of which
2800 sections should be considered to be mapped from the VMA to the LMA.
2801 This information is used for symbol lookup, and memory read/write.
2802 For instance, if a section has been mapped then its contents
2803 should be read from the VMA, otherwise from the LMA.
2805 Two levels of debugger support for overlays are available. One is
2806 "manual", in which the debugger relies on the user to tell it which
2807 overlays are currently mapped. This level of support is
2808 implemented entirely in the core debugger, and the information about
2809 whether a section is mapped is kept in the objfile->obj_section table.
2811 The second level of support is "automatic", and is only available if
2812 the target-specific code provides functionality to read the target's
2813 overlay mapping table, and translate its contents for the debugger
2814 (by updating the mapped state information in the obj_section tables).
2816 The interface is as follows:
2818 overlay map <name> -- tell gdb to consider this section mapped
2819 overlay unmap <name> -- tell gdb to consider this section unmapped
2820 overlay list -- list the sections that GDB thinks are mapped
2821 overlay read-target -- get the target's state of what's mapped
2822 overlay off/manual/auto -- set overlay debugging state
2823 Functional interface:
2824 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2825 section, return that section.
2826 find_pc_overlay(pc): find any overlay section that contains
2827 the pc, either in its VMA or its LMA
2828 overlay_is_mapped(sect): true if overlay is marked as mapped
2829 section_is_overlay(sect): true if section's VMA != LMA
2830 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2831 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2832 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2833 overlay_mapped_address(...): map an address from section's LMA to VMA
2834 overlay_unmapped_address(...): map an address from section's VMA to LMA
2835 symbol_overlayed_address(...): Return a "current" address for symbol:
2836 either in VMA or LMA depending on whether
2837 the symbol's section is currently mapped
2840 /* Overlay debugging state: */
2842 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2843 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2845 /* Target vector for refreshing overlay mapped state */
2846 static void simple_overlay_update (struct obj_section
*);
2847 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2849 /* Function: section_is_overlay (SECTION)
2850 Returns true if SECTION has VMA not equal to LMA, ie.
2851 SECTION is loaded at an address different from where it will "run". */
2854 section_is_overlay (asection
*section
)
2856 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2858 if (overlay_debugging
)
2859 if (section
&& section
->lma
!= 0 &&
2860 section
->vma
!= section
->lma
)
2866 /* Function: overlay_invalidate_all (void)
2867 Invalidate the mapped state of all overlay sections (mark it as stale). */
2870 overlay_invalidate_all (void)
2872 struct objfile
*objfile
;
2873 struct obj_section
*sect
;
2875 ALL_OBJSECTIONS (objfile
, sect
)
2876 if (section_is_overlay (sect
->the_bfd_section
))
2877 sect
->ovly_mapped
= -1;
2880 /* Function: overlay_is_mapped (SECTION)
2881 Returns true if section is an overlay, and is currently mapped.
2882 Private: public access is thru function section_is_mapped.
2884 Access to the ovly_mapped flag is restricted to this function, so
2885 that we can do automatic update. If the global flag
2886 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2887 overlay_invalidate_all. If the mapped state of the particular
2888 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2891 overlay_is_mapped (struct obj_section
*osect
)
2893 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2896 switch (overlay_debugging
)
2900 return 0; /* overlay debugging off */
2901 case ovly_auto
: /* overlay debugging automatic */
2902 /* Unles there is a target_overlay_update function,
2903 there's really nothing useful to do here (can't really go auto) */
2904 if (target_overlay_update
)
2906 if (overlay_cache_invalid
)
2908 overlay_invalidate_all ();
2909 overlay_cache_invalid
= 0;
2911 if (osect
->ovly_mapped
== -1)
2912 (*target_overlay_update
) (osect
);
2914 /* fall thru to manual case */
2915 case ovly_on
: /* overlay debugging manual */
2916 return osect
->ovly_mapped
== 1;
2920 /* Function: section_is_mapped
2921 Returns true if section is an overlay, and is currently mapped. */
2924 section_is_mapped (asection
*section
)
2926 struct objfile
*objfile
;
2927 struct obj_section
*osect
;
2929 if (overlay_debugging
)
2930 if (section
&& section_is_overlay (section
))
2931 ALL_OBJSECTIONS (objfile
, osect
)
2932 if (osect
->the_bfd_section
== section
)
2933 return overlay_is_mapped (osect
);
2938 /* Function: pc_in_unmapped_range
2939 If PC falls into the lma range of SECTION, return true, else false. */
2942 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2944 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2948 if (overlay_debugging
)
2949 if (section
&& section_is_overlay (section
))
2951 size
= bfd_get_section_size_before_reloc (section
);
2952 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2958 /* Function: pc_in_mapped_range
2959 If PC falls into the vma range of SECTION, return true, else false. */
2962 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2964 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2968 if (overlay_debugging
)
2969 if (section
&& section_is_overlay (section
))
2971 size
= bfd_get_section_size_before_reloc (section
);
2972 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2979 /* Return true if the mapped ranges of sections A and B overlap, false
2982 sections_overlap (asection
*a
, asection
*b
)
2984 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2986 CORE_ADDR a_start
= a
->vma
;
2987 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
2988 CORE_ADDR b_start
= b
->vma
;
2989 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
2991 return (a_start
< b_end
&& b_start
< a_end
);
2994 /* Function: overlay_unmapped_address (PC, SECTION)
2995 Returns the address corresponding to PC in the unmapped (load) range.
2996 May be the same as PC. */
2999 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3001 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3003 if (overlay_debugging
)
3004 if (section
&& section_is_overlay (section
) &&
3005 pc_in_mapped_range (pc
, section
))
3006 return pc
+ section
->lma
- section
->vma
;
3011 /* Function: overlay_mapped_address (PC, SECTION)
3012 Returns the address corresponding to PC in the mapped (runtime) range.
3013 May be the same as PC. */
3016 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3018 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3020 if (overlay_debugging
)
3021 if (section
&& section_is_overlay (section
) &&
3022 pc_in_unmapped_range (pc
, section
))
3023 return pc
+ section
->vma
- section
->lma
;
3029 /* Function: symbol_overlayed_address
3030 Return one of two addresses (relative to the VMA or to the LMA),
3031 depending on whether the section is mapped or not. */
3034 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3036 if (overlay_debugging
)
3038 /* If the symbol has no section, just return its regular address. */
3041 /* If the symbol's section is not an overlay, just return its address */
3042 if (!section_is_overlay (section
))
3044 /* If the symbol's section is mapped, just return its address */
3045 if (section_is_mapped (section
))
3048 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3049 * then return its LOADED address rather than its vma address!!
3051 return overlay_unmapped_address (address
, section
);
3056 /* Function: find_pc_overlay (PC)
3057 Return the best-match overlay section for PC:
3058 If PC matches a mapped overlay section's VMA, return that section.
3059 Else if PC matches an unmapped section's VMA, return that section.
3060 Else if PC matches an unmapped section's LMA, return that section. */
3063 find_pc_overlay (CORE_ADDR pc
)
3065 struct objfile
*objfile
;
3066 struct obj_section
*osect
, *best_match
= NULL
;
3068 if (overlay_debugging
)
3069 ALL_OBJSECTIONS (objfile
, osect
)
3070 if (section_is_overlay (osect
->the_bfd_section
))
3072 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3074 if (overlay_is_mapped (osect
))
3075 return osect
->the_bfd_section
;
3079 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3082 return best_match
? best_match
->the_bfd_section
: NULL
;
3085 /* Function: find_pc_mapped_section (PC)
3086 If PC falls into the VMA address range of an overlay section that is
3087 currently marked as MAPPED, return that section. Else return NULL. */
3090 find_pc_mapped_section (CORE_ADDR pc
)
3092 struct objfile
*objfile
;
3093 struct obj_section
*osect
;
3095 if (overlay_debugging
)
3096 ALL_OBJSECTIONS (objfile
, osect
)
3097 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3098 overlay_is_mapped (osect
))
3099 return osect
->the_bfd_section
;
3104 /* Function: list_overlays_command
3105 Print a list of mapped sections and their PC ranges */
3108 list_overlays_command (char *args
, int from_tty
)
3111 struct objfile
*objfile
;
3112 struct obj_section
*osect
;
3114 if (overlay_debugging
)
3115 ALL_OBJSECTIONS (objfile
, osect
)
3116 if (overlay_is_mapped (osect
))
3122 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3123 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3124 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3125 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3127 printf_filtered ("Section %s, loaded at ", name
);
3128 print_address_numeric (lma
, 1, gdb_stdout
);
3129 puts_filtered (" - ");
3130 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3131 printf_filtered (", mapped at ");
3132 print_address_numeric (vma
, 1, gdb_stdout
);
3133 puts_filtered (" - ");
3134 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3135 puts_filtered ("\n");
3140 printf_filtered ("No sections are mapped.\n");
3143 /* Function: map_overlay_command
3144 Mark the named section as mapped (ie. residing at its VMA address). */
3147 map_overlay_command (char *args
, int from_tty
)
3149 struct objfile
*objfile
, *objfile2
;
3150 struct obj_section
*sec
, *sec2
;
3153 if (!overlay_debugging
)
3155 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3156 the 'overlay manual' command.");
3158 if (args
== 0 || *args
== 0)
3159 error ("Argument required: name of an overlay section");
3161 /* First, find a section matching the user supplied argument */
3162 ALL_OBJSECTIONS (objfile
, sec
)
3163 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3165 /* Now, check to see if the section is an overlay. */
3166 bfdsec
= sec
->the_bfd_section
;
3167 if (!section_is_overlay (bfdsec
))
3168 continue; /* not an overlay section */
3170 /* Mark the overlay as "mapped" */
3171 sec
->ovly_mapped
= 1;
3173 /* Next, make a pass and unmap any sections that are
3174 overlapped by this new section: */
3175 ALL_OBJSECTIONS (objfile2
, sec2
)
3176 if (sec2
->ovly_mapped
3178 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3179 && sections_overlap (sec
->the_bfd_section
,
3180 sec2
->the_bfd_section
))
3183 printf_unfiltered ("Note: section %s unmapped by overlap\n",
3184 bfd_section_name (objfile
->obfd
,
3185 sec2
->the_bfd_section
));
3186 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3190 error ("No overlay section called %s", args
);
3193 /* Function: unmap_overlay_command
3194 Mark the overlay section as unmapped
3195 (ie. resident in its LMA address range, rather than the VMA range). */
3198 unmap_overlay_command (char *args
, int from_tty
)
3200 struct objfile
*objfile
;
3201 struct obj_section
*sec
;
3203 if (!overlay_debugging
)
3205 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3206 the 'overlay manual' command.");
3208 if (args
== 0 || *args
== 0)
3209 error ("Argument required: name of an overlay section");
3211 /* First, find a section matching the user supplied argument */
3212 ALL_OBJSECTIONS (objfile
, sec
)
3213 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3215 if (!sec
->ovly_mapped
)
3216 error ("Section %s is not mapped", args
);
3217 sec
->ovly_mapped
= 0;
3220 error ("No overlay section called %s", args
);
3223 /* Function: overlay_auto_command
3224 A utility command to turn on overlay debugging.
3225 Possibly this should be done via a set/show command. */
3228 overlay_auto_command (char *args
, int from_tty
)
3230 overlay_debugging
= ovly_auto
;
3231 enable_overlay_breakpoints ();
3233 printf_unfiltered ("Automatic overlay debugging enabled.");
3236 /* Function: overlay_manual_command
3237 A utility command to turn on overlay debugging.
3238 Possibly this should be done via a set/show command. */
3241 overlay_manual_command (char *args
, int from_tty
)
3243 overlay_debugging
= ovly_on
;
3244 disable_overlay_breakpoints ();
3246 printf_unfiltered ("Overlay debugging enabled.");
3249 /* Function: overlay_off_command
3250 A utility command to turn on overlay debugging.
3251 Possibly this should be done via a set/show command. */
3254 overlay_off_command (char *args
, int from_tty
)
3256 overlay_debugging
= ovly_off
;
3257 disable_overlay_breakpoints ();
3259 printf_unfiltered ("Overlay debugging disabled.");
3263 overlay_load_command (char *args
, int from_tty
)
3265 if (target_overlay_update
)
3266 (*target_overlay_update
) (NULL
);
3268 error ("This target does not know how to read its overlay state.");
3271 /* Function: overlay_command
3272 A place-holder for a mis-typed command */
3274 /* Command list chain containing all defined "overlay" subcommands. */
3275 struct cmd_list_element
*overlaylist
;
3278 overlay_command (char *args
, int from_tty
)
3281 ("\"overlay\" must be followed by the name of an overlay command.\n");
3282 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3286 /* Target Overlays for the "Simplest" overlay manager:
3288 This is GDB's default target overlay layer. It works with the
3289 minimal overlay manager supplied as an example by Cygnus. The
3290 entry point is via a function pointer "target_overlay_update",
3291 so targets that use a different runtime overlay manager can
3292 substitute their own overlay_update function and take over the
3295 The overlay_update function pokes around in the target's data structures
3296 to see what overlays are mapped, and updates GDB's overlay mapping with
3299 In this simple implementation, the target data structures are as follows:
3300 unsigned _novlys; /# number of overlay sections #/
3301 unsigned _ovly_table[_novlys][4] = {
3302 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3303 {..., ..., ..., ...},
3305 unsigned _novly_regions; /# number of overlay regions #/
3306 unsigned _ovly_region_table[_novly_regions][3] = {
3307 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3310 These functions will attempt to update GDB's mappedness state in the
3311 symbol section table, based on the target's mappedness state.
3313 To do this, we keep a cached copy of the target's _ovly_table, and
3314 attempt to detect when the cached copy is invalidated. The main
3315 entry point is "simple_overlay_update(SECT), which looks up SECT in
3316 the cached table and re-reads only the entry for that section from
3317 the target (whenever possible).
3320 /* Cached, dynamically allocated copies of the target data structures: */
3321 static unsigned (*cache_ovly_table
)[4] = 0;
3323 static unsigned (*cache_ovly_region_table
)[3] = 0;
3325 static unsigned cache_novlys
= 0;
3327 static unsigned cache_novly_regions
= 0;
3329 static CORE_ADDR cache_ovly_table_base
= 0;
3331 static CORE_ADDR cache_ovly_region_table_base
= 0;
3335 VMA
, SIZE
, LMA
, MAPPED
3337 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3339 /* Throw away the cached copy of _ovly_table */
3341 simple_free_overlay_table (void)
3343 if (cache_ovly_table
)
3344 xfree (cache_ovly_table
);
3346 cache_ovly_table
= NULL
;
3347 cache_ovly_table_base
= 0;
3351 /* Throw away the cached copy of _ovly_region_table */
3353 simple_free_overlay_region_table (void)
3355 if (cache_ovly_region_table
)
3356 xfree (cache_ovly_region_table
);
3357 cache_novly_regions
= 0;
3358 cache_ovly_region_table
= NULL
;
3359 cache_ovly_region_table_base
= 0;
3363 /* Read an array of ints from the target into a local buffer.
3364 Convert to host order. int LEN is number of ints */
3366 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3368 /* FIXME (alloca): Not safe if array is very large. */
3369 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3372 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3373 for (i
= 0; i
< len
; i
++)
3374 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3378 /* Find and grab a copy of the target _ovly_table
3379 (and _novlys, which is needed for the table's size) */
3381 simple_read_overlay_table (void)
3383 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3385 simple_free_overlay_table ();
3386 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3389 error ("Error reading inferior's overlay table: "
3390 "couldn't find `_novlys' variable\n"
3391 "in inferior. Use `overlay manual' mode.");
3395 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3396 if (! ovly_table_msym
)
3398 error ("Error reading inferior's overlay table: couldn't find "
3399 "`_ovly_table' array\n"
3400 "in inferior. Use `overlay manual' mode.");
3404 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3406 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3407 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3408 read_target_long_array (cache_ovly_table_base
,
3409 (int *) cache_ovly_table
,
3412 return 1; /* SUCCESS */
3416 /* Find and grab a copy of the target _ovly_region_table
3417 (and _novly_regions, which is needed for the table's size) */
3419 simple_read_overlay_region_table (void)
3421 struct minimal_symbol
*msym
;
3423 simple_free_overlay_region_table ();
3424 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3426 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3428 return 0; /* failure */
3429 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3430 if (cache_ovly_region_table
!= NULL
)
3432 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3435 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3436 read_target_long_array (cache_ovly_region_table_base
,
3437 (int *) cache_ovly_region_table
,
3438 cache_novly_regions
* 3);
3441 return 0; /* failure */
3444 return 0; /* failure */
3445 return 1; /* SUCCESS */
3449 /* Function: simple_overlay_update_1
3450 A helper function for simple_overlay_update. Assuming a cached copy
3451 of _ovly_table exists, look through it to find an entry whose vma,
3452 lma and size match those of OSECT. Re-read the entry and make sure
3453 it still matches OSECT (else the table may no longer be valid).
3454 Set OSECT's mapped state to match the entry. Return: 1 for
3455 success, 0 for failure. */
3458 simple_overlay_update_1 (struct obj_section
*osect
)
3461 bfd
*obfd
= osect
->objfile
->obfd
;
3462 asection
*bsect
= osect
->the_bfd_section
;
3464 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3465 for (i
= 0; i
< cache_novlys
; i
++)
3466 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3467 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3468 /* && cache_ovly_table[i][SIZE] == size */ )
3470 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3471 (int *) cache_ovly_table
[i
], 4);
3472 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3473 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3474 /* && cache_ovly_table[i][SIZE] == size */ )
3476 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3479 else /* Warning! Warning! Target's ovly table has changed! */
3485 /* Function: simple_overlay_update
3486 If OSECT is NULL, then update all sections' mapped state
3487 (after re-reading the entire target _ovly_table).
3488 If OSECT is non-NULL, then try to find a matching entry in the
3489 cached ovly_table and update only OSECT's mapped state.
3490 If a cached entry can't be found or the cache isn't valid, then
3491 re-read the entire cache, and go ahead and update all sections. */
3494 simple_overlay_update (struct obj_section
*osect
)
3496 struct objfile
*objfile
;
3498 /* Were we given an osect to look up? NULL means do all of them. */
3500 /* Have we got a cached copy of the target's overlay table? */
3501 if (cache_ovly_table
!= NULL
)
3502 /* Does its cached location match what's currently in the symtab? */
3503 if (cache_ovly_table_base
==
3504 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3505 /* Then go ahead and try to look up this single section in the cache */
3506 if (simple_overlay_update_1 (osect
))
3507 /* Found it! We're done. */
3510 /* Cached table no good: need to read the entire table anew.
3511 Or else we want all the sections, in which case it's actually
3512 more efficient to read the whole table in one block anyway. */
3514 if (! simple_read_overlay_table ())
3517 /* Now may as well update all sections, even if only one was requested. */
3518 ALL_OBJSECTIONS (objfile
, osect
)
3519 if (section_is_overlay (osect
->the_bfd_section
))
3522 bfd
*obfd
= osect
->objfile
->obfd
;
3523 asection
*bsect
= osect
->the_bfd_section
;
3525 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3526 for (i
= 0; i
< cache_novlys
; i
++)
3527 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3528 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3529 /* && cache_ovly_table[i][SIZE] == size */ )
3530 { /* obj_section matches i'th entry in ovly_table */
3531 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3532 break; /* finished with inner for loop: break out */
3537 /* Set the output sections and output offsets for section SECTP in
3538 ABFD. The relocation code in BFD will read these offsets, so we
3539 need to be sure they're initialized. We map each section to itself,
3540 with no offset; this means that SECTP->vma will be honored. */
3543 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3545 sectp
->output_section
= sectp
;
3546 sectp
->output_offset
= 0;
3549 /* Relocate the contents of a debug section SECTP in ABFD. The
3550 contents are stored in BUF if it is non-NULL, or returned in a
3551 malloc'd buffer otherwise.
3553 For some platforms and debug info formats, shared libraries contain
3554 relocations against the debug sections (particularly for DWARF-2;
3555 one affected platform is PowerPC GNU/Linux, although it depends on
3556 the version of the linker in use). Also, ELF object files naturally
3557 have unresolved relocations for their debug sections. We need to apply
3558 the relocations in order to get the locations of symbols correct. */
3561 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3563 /* We're only interested in debugging sections with relocation
3565 if ((sectp
->flags
& SEC_RELOC
) == 0)
3567 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3570 /* We will handle section offsets properly elsewhere, so relocate as if
3571 all sections begin at 0. */
3572 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3574 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3578 _initialize_symfile (void)
3580 struct cmd_list_element
*c
;
3582 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3583 "Load symbol table from executable file FILE.\n\
3584 The `file' command can also load symbol tables, as well as setting the file\n\
3585 to execute.", &cmdlist
);
3586 set_cmd_completer (c
, filename_completer
);
3588 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3589 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3590 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3591 ADDR is the starting address of the file's text.\n\
3592 The optional arguments are section-name section-address pairs and\n\
3593 should be specified if the data and bss segments are not contiguous\n\
3594 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3596 set_cmd_completer (c
, filename_completer
);
3598 c
= add_cmd ("add-shared-symbol-files", class_files
,
3599 add_shared_symbol_files_command
,
3600 "Load the symbols from shared objects in the dynamic linker's link map.",
3602 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3605 c
= add_cmd ("load", class_files
, load_command
,
3606 "Dynamically load FILE into the running program, and record its symbols\n\
3607 for access from GDB.", &cmdlist
);
3608 set_cmd_completer (c
, filename_completer
);
3611 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3612 (char *) &symbol_reloading
,
3613 "Set dynamic symbol table reloading multiple times in one run.",
3617 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3618 "Commands for debugging overlays.", &overlaylist
,
3619 "overlay ", 0, &cmdlist
);
3621 add_com_alias ("ovly", "overlay", class_alias
, 1);
3622 add_com_alias ("ov", "overlay", class_alias
, 1);
3624 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3625 "Assert that an overlay section is mapped.", &overlaylist
);
3627 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3628 "Assert that an overlay section is unmapped.", &overlaylist
);
3630 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3631 "List mappings of overlay sections.", &overlaylist
);
3633 add_cmd ("manual", class_support
, overlay_manual_command
,
3634 "Enable overlay debugging.", &overlaylist
);
3635 add_cmd ("off", class_support
, overlay_off_command
,
3636 "Disable overlay debugging.", &overlaylist
);
3637 add_cmd ("auto", class_support
, overlay_auto_command
,
3638 "Enable automatic overlay debugging.", &overlaylist
);
3639 add_cmd ("load-target", class_support
, overlay_load_command
,
3640 "Read the overlay mapping state from the target.", &overlaylist
);
3642 /* Filename extension to source language lookup table: */
3643 init_filename_language_table ();
3644 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3646 "Set mapping between filename extension and source language.\n\
3647 Usage: set extension-language .foo bar",
3649 set_cmd_cfunc (c
, set_ext_lang_command
);
3651 add_info ("extensions", info_ext_lang_command
,
3652 "All filename extensions associated with a source language.");
3655 (add_set_cmd ("download-write-size", class_obscure
,
3656 var_integer
, (char *) &download_write_size
,
3657 "Set the write size used when downloading a program.\n"
3658 "Only used when downloading a program onto a remote\n"
3659 "target. Specify zero, or a negative value, to disable\n"
3660 "blocked writes. The actual size of each transfer is also\n"
3661 "limited by the size of the target packet and the memory\n"
3666 debug_file_directory
= xstrdup (DEBUGDIR
);
3668 ("debug-file-directory", class_support
, var_string
,
3669 (char *) &debug_file_directory
,
3670 "Set the directory where separate debug symbols are searched for.\n"
3671 "Separate debug symbols are first searched for in the same\n"
3672 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3674 "and lastly at the path of the directory of the binary with\n"
3675 "the global debug-file directory prepended\n",
3677 add_show_from_set (c
, &showlist
);
3678 set_cmd_completer (c
, filename_completer
);