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 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. */
36 #include "breakpoint.h"
38 #include "complaints.h"
40 #include "inferior.h" /* for write_pc */
41 #include "gdb-stabs.h"
42 #include "gdb_obstack.h"
43 #include "completer.h"
46 #include <sys/types.h>
48 #include "gdb_string.h"
59 /* Some HP-UX related globals to clear when a new "main"
60 symbol file is loaded. HP-specific. */
62 extern int hp_som_som_object_present
;
63 extern int hp_cxx_exception_support_initialized
;
64 #define RESET_HP_UX_GLOBALS() do {\
65 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
66 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
70 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
71 void (*show_load_progress
) (const char *section
,
72 unsigned long section_sent
,
73 unsigned long section_size
,
74 unsigned long total_sent
,
75 unsigned long total_size
);
76 void (*pre_add_symbol_hook
) (char *);
77 void (*post_add_symbol_hook
) (void);
78 void (*target_new_objfile_hook
) (struct objfile
*);
80 static void clear_symtab_users_cleanup (void *ignore
);
82 /* Global variables owned by this file */
83 int readnow_symbol_files
; /* Read full symbols immediately */
85 /* External variables and functions referenced. */
87 extern void report_transfer_performance (unsigned long, time_t, time_t);
89 /* Functions this file defines */
92 static int simple_read_overlay_region_table (void);
93 static void simple_free_overlay_region_table (void);
96 static void set_initial_language (void);
98 static void load_command (char *, int);
100 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
102 static void add_symbol_file_command (char *, int);
104 static void add_shared_symbol_files_command (char *, int);
106 static void cashier_psymtab (struct partial_symtab
*);
108 bfd
*symfile_bfd_open (char *);
110 int get_section_index (struct objfile
*, char *);
112 static void find_sym_fns (struct objfile
*);
114 static void decrement_reading_symtab (void *);
116 static void overlay_invalidate_all (void);
118 static int overlay_is_mapped (struct obj_section
*);
120 void list_overlays_command (char *, int);
122 void map_overlay_command (char *, int);
124 void unmap_overlay_command (char *, int);
126 static void overlay_auto_command (char *, int);
128 static void overlay_manual_command (char *, int);
130 static void overlay_off_command (char *, int);
132 static void overlay_load_command (char *, int);
134 static void overlay_command (char *, int);
136 static void simple_free_overlay_table (void);
138 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
140 static int simple_read_overlay_table (void);
142 static int simple_overlay_update_1 (struct obj_section
*);
144 static void add_filename_language (char *ext
, enum language lang
);
146 static void set_ext_lang_command (char *args
, int from_tty
);
148 static void info_ext_lang_command (char *args
, int from_tty
);
150 static void init_filename_language_table (void);
152 void _initialize_symfile (void);
154 /* List of all available sym_fns. On gdb startup, each object file reader
155 calls add_symtab_fns() to register information on each format it is
158 static struct sym_fns
*symtab_fns
= NULL
;
160 /* Flag for whether user will be reloading symbols multiple times.
161 Defaults to ON for VxWorks, otherwise OFF. */
163 #ifdef SYMBOL_RELOADING_DEFAULT
164 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
166 int symbol_reloading
= 0;
169 /* If non-zero, shared library symbols will be added automatically
170 when the inferior is created, new libraries are loaded, or when
171 attaching to the inferior. This is almost always what users will
172 want to have happen; but for very large programs, the startup time
173 will be excessive, and so if this is a problem, the user can clear
174 this flag and then add the shared library symbols as needed. Note
175 that there is a potential for confusion, since if the shared
176 library symbols are not loaded, commands like "info fun" will *not*
177 report all the functions that are actually present. */
179 int auto_solib_add
= 1;
181 /* For systems that support it, a threshold size in megabytes. If
182 automatically adding a new library's symbol table to those already
183 known to the debugger would cause the total shared library symbol
184 size to exceed this threshhold, then the shlib's symbols are not
185 added. The threshold is ignored if the user explicitly asks for a
186 shlib to be added, such as when using the "sharedlibrary"
189 int auto_solib_limit
;
192 /* Since this function is called from within qsort, in an ANSI environment
193 it must conform to the prototype for qsort, which specifies that the
194 comparison function takes two "void *" pointers. */
197 compare_symbols (const void *s1p
, const void *s2p
)
199 register struct symbol
**s1
, **s2
;
201 s1
= (struct symbol
**) s1p
;
202 s2
= (struct symbol
**) s2p
;
203 return (strcmp (SYMBOL_SOURCE_NAME (*s1
), SYMBOL_SOURCE_NAME (*s2
)));
210 compare_psymbols -- compare two partial symbols by name
214 Given pointers to pointers to two partial symbol table entries,
215 compare them by name and return -N, 0, or +N (ala strcmp).
216 Typically used by sorting routines like qsort().
220 Does direct compare of first two characters before punting
221 and passing to strcmp for longer compares. Note that the
222 original version had a bug whereby two null strings or two
223 identically named one character strings would return the
224 comparison of memory following the null byte.
229 compare_psymbols (const void *s1p
, const void *s2p
)
231 register struct partial_symbol
**s1
, **s2
;
232 register char *st1
, *st2
;
234 s1
= (struct partial_symbol
**) s1p
;
235 s2
= (struct partial_symbol
**) s2p
;
236 st1
= SYMBOL_SOURCE_NAME (*s1
);
237 st2
= SYMBOL_SOURCE_NAME (*s2
);
240 if ((st1
[0] - st2
[0]) || !st1
[0])
242 return (st1
[0] - st2
[0]);
244 else if ((st1
[1] - st2
[1]) || !st1
[1])
246 return (st1
[1] - st2
[1]);
250 return (strcmp (st1
, st2
));
255 sort_pst_symbols (struct partial_symtab
*pst
)
257 /* Sort the global list; don't sort the static list */
259 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
260 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
264 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
267 sort_block_syms (register struct block
*b
)
269 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
270 sizeof (struct symbol
*), compare_symbols
);
273 /* Call sort_symtab_syms to sort alphabetically
274 the symbols of each block of one symtab. */
277 sort_symtab_syms (register struct symtab
*s
)
279 register struct blockvector
*bv
;
282 register struct block
*b
;
286 bv
= BLOCKVECTOR (s
);
287 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
288 for (i
= 0; i
< nbl
; i
++)
290 b
= BLOCKVECTOR_BLOCK (bv
, i
);
291 if (BLOCK_SHOULD_SORT (b
))
296 /* Make a null terminated copy of the string at PTR with SIZE characters in
297 the obstack pointed to by OBSTACKP . Returns the address of the copy.
298 Note that the string at PTR does not have to be null terminated, I.E. it
299 may be part of a larger string and we are only saving a substring. */
302 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
304 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
305 /* Open-coded memcpy--saves function call time. These strings are usually
306 short. FIXME: Is this really still true with a compiler that can
309 register const char *p1
= ptr
;
310 register char *p2
= p
;
311 const char *end
= ptr
+ size
;
319 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
320 in the obstack pointed to by OBSTACKP. */
323 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
326 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
327 register char *val
= (char *) obstack_alloc (obstackp
, len
);
334 /* True if we are nested inside psymtab_to_symtab. */
336 int currently_reading_symtab
= 0;
339 decrement_reading_symtab (void *dummy
)
341 currently_reading_symtab
--;
344 /* Get the symbol table that corresponds to a partial_symtab.
345 This is fast after the first time you do it. In fact, there
346 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
350 psymtab_to_symtab (register struct partial_symtab
*pst
)
352 /* If it's been looked up before, return it. */
356 /* If it has not yet been read in, read it. */
359 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
360 currently_reading_symtab
++;
361 (*pst
->read_symtab
) (pst
);
362 do_cleanups (back_to
);
368 /* Initialize entry point information for this objfile. */
371 init_entry_point_info (struct objfile
*objfile
)
373 /* Save startup file's range of PC addresses to help blockframe.c
374 decide where the bottom of the stack is. */
376 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
378 /* Executable file -- record its entry point so we'll recognize
379 the startup file because it contains the entry point. */
380 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
384 /* Examination of non-executable.o files. Short-circuit this stuff. */
385 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
387 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
388 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
389 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
390 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
391 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
392 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
395 /* Get current entry point address. */
398 entry_point_address (void)
400 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
403 /* Remember the lowest-addressed loadable section we've seen.
404 This function is called via bfd_map_over_sections.
406 In case of equal vmas, the section with the largest size becomes the
407 lowest-addressed loadable section.
409 If the vmas and sizes are equal, the last section is considered the
410 lowest-addressed loadable section. */
413 find_lowest_section (bfd
*abfd
, asection
*sect
, PTR obj
)
415 asection
**lowest
= (asection
**) obj
;
417 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
420 *lowest
= sect
; /* First loadable section */
421 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
422 *lowest
= sect
; /* A lower loadable section */
423 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
424 && (bfd_section_size (abfd
, (*lowest
))
425 <= bfd_section_size (abfd
, sect
)))
430 /* Build (allocate and populate) a section_addr_info struct from
431 an existing section table. */
433 extern struct section_addr_info
*
434 build_section_addr_info_from_section_table (const struct section_table
*start
,
435 const struct section_table
*end
)
437 struct section_addr_info
*sap
;
438 const struct section_table
*stp
;
441 sap
= xmalloc (sizeof (struct section_addr_info
));
442 memset (sap
, 0, sizeof (struct section_addr_info
));
444 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
446 if (bfd_get_section_flags (stp
->bfd
,
447 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
448 && oidx
< MAX_SECTIONS
)
450 sap
->other
[oidx
].addr
= stp
->addr
;
451 sap
->other
[oidx
].name
452 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
453 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
462 /* Free all memory allocated by build_section_addr_info_from_section_table. */
465 free_section_addr_info (struct section_addr_info
*sap
)
469 for (idx
= 0; idx
< MAX_SECTIONS
; idx
++)
470 if (sap
->other
[idx
].name
)
471 xfree (sap
->other
[idx
].name
);
476 /* Parse the user's idea of an offset for dynamic linking, into our idea
477 of how to represent it for fast symbol reading. This is the default
478 version of the sym_fns.sym_offsets function for symbol readers that
479 don't need to do anything special. It allocates a section_offsets table
480 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
483 default_symfile_offsets (struct objfile
*objfile
,
484 struct section_addr_info
*addrs
)
487 asection
*sect
= NULL
;
489 objfile
->num_sections
= SECT_OFF_MAX
;
490 objfile
->section_offsets
= (struct section_offsets
*)
491 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
492 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
494 /* Now calculate offsets for section that were specified by the
496 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
498 struct other_sections
*osp
;
500 osp
= &addrs
->other
[i
] ;
504 /* Record all sections in offsets */
505 /* The section_offsets in the objfile are here filled in using
507 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
510 /* Remember the bfd indexes for the .text, .data, .bss and
513 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
515 objfile
->sect_index_text
= sect
->index
;
517 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
519 objfile
->sect_index_data
= sect
->index
;
521 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
523 objfile
->sect_index_bss
= sect
->index
;
525 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
527 objfile
->sect_index_rodata
= sect
->index
;
529 /* This is where things get really weird... We MUST have valid
530 indices for the various sect_index_* members or gdb will abort.
531 So if for example, there is no ".text" section, we have to
532 accomodate that. Except when explicitly adding symbol files at
533 some address, section_offsets contains nothing but zeros, so it
534 doesn't matter which slot in section_offsets the individual
535 sect_index_* members index into. So if they are all zero, it is
536 safe to just point all the currently uninitialized indices to the
539 for (i
= 0; i
< objfile
->num_sections
; i
++)
541 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
546 if (i
== objfile
->num_sections
)
548 if (objfile
->sect_index_text
== -1)
549 objfile
->sect_index_text
= 0;
550 if (objfile
->sect_index_data
== -1)
551 objfile
->sect_index_data
= 0;
552 if (objfile
->sect_index_bss
== -1)
553 objfile
->sect_index_bss
= 0;
554 if (objfile
->sect_index_rodata
== -1)
555 objfile
->sect_index_rodata
= 0;
559 /* Process a symbol file, as either the main file or as a dynamically
562 OBJFILE is where the symbols are to be read from.
564 ADDR is the address where the text segment was loaded, unless the
565 objfile is the main symbol file, in which case it is zero.
567 MAINLINE is nonzero if this is the main symbol file, or zero if
568 it's an extra symbol file such as dynamically loaded code.
570 VERBO is nonzero if the caller has printed a verbose message about
571 the symbol reading (and complaints can be more terse about it). */
574 syms_from_objfile (struct objfile
*objfile
, struct section_addr_info
*addrs
,
575 int mainline
, int verbo
)
577 asection
*lower_sect
;
579 CORE_ADDR lower_offset
;
580 struct section_addr_info local_addr
;
581 struct cleanup
*old_chain
;
584 /* If ADDRS is NULL, initialize the local section_addr_info struct and
585 point ADDRS to it. We now establish the convention that an addr of
586 zero means no load address was specified. */
590 memset (&local_addr
, 0, sizeof (local_addr
));
594 init_entry_point_info (objfile
);
595 find_sym_fns (objfile
);
597 if (objfile
->sf
== NULL
)
598 return; /* No symbols. */
600 /* Make sure that partially constructed symbol tables will be cleaned up
601 if an error occurs during symbol reading. */
602 old_chain
= make_cleanup_free_objfile (objfile
);
606 /* We will modify the main symbol table, make sure that all its users
607 will be cleaned up if an error occurs during symbol reading. */
608 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
610 /* Since no error yet, throw away the old symbol table. */
612 if (symfile_objfile
!= NULL
)
614 free_objfile (symfile_objfile
);
615 symfile_objfile
= NULL
;
618 /* Currently we keep symbols from the add-symbol-file command.
619 If the user wants to get rid of them, they should do "symbol-file"
620 without arguments first. Not sure this is the best behavior
623 (*objfile
->sf
->sym_new_init
) (objfile
);
626 /* Convert addr into an offset rather than an absolute address.
627 We find the lowest address of a loaded segment in the objfile,
628 and assume that <addr> is where that got loaded.
630 We no longer warn if the lowest section is not a text segment (as
631 happens for the PA64 port. */
634 /* Find lowest loadable section to be used as starting point for
635 continguous sections. FIXME!! won't work without call to find
636 .text first, but this assumes text is lowest section. */
637 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
638 if (lower_sect
== NULL
)
639 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
641 if (lower_sect
== NULL
)
642 warning ("no loadable sections found in added symbol-file %s",
645 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
646 warning ("Lowest section in %s is %s at %s",
648 bfd_section_name (objfile
->obfd
, lower_sect
),
649 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
650 if (lower_sect
!= NULL
)
651 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
655 /* Calculate offsets for the loadable sections.
656 FIXME! Sections must be in order of increasing loadable section
657 so that contiguous sections can use the lower-offset!!!
659 Adjust offsets if the segments are not contiguous.
660 If the section is contiguous, its offset should be set to
661 the offset of the highest loadable section lower than it
662 (the loadable section directly below it in memory).
663 this_offset = lower_offset = lower_addr - lower_orig_addr */
665 /* Calculate offsets for sections. */
666 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
668 if (addrs
->other
[i
].addr
!= 0)
670 sect
= bfd_get_section_by_name (objfile
->obfd
,
671 addrs
->other
[i
].name
);
675 -= bfd_section_vma (objfile
->obfd
, sect
);
676 lower_offset
= addrs
->other
[i
].addr
;
677 /* This is the index used by BFD. */
678 addrs
->other
[i
].sectindex
= sect
->index
;
682 warning ("section %s not found in %s", addrs
->other
[i
].name
,
684 addrs
->other
[i
].addr
= 0;
688 addrs
->other
[i
].addr
= lower_offset
;
692 /* Initialize symbol reading routines for this objfile, allow complaints to
693 appear for this new file, and record how verbose to be, then do the
694 initial symbol reading for this file. */
696 (*objfile
->sf
->sym_init
) (objfile
);
697 clear_complaints (&symfile_complaints
, 1, verbo
);
699 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
701 #ifndef IBM6000_TARGET
702 /* This is a SVR4/SunOS specific hack, I think. In any event, it
703 screws RS/6000. sym_offsets should be doing this sort of thing,
704 because it knows the mapping between bfd sections and
706 /* This is a hack. As far as I can tell, section offsets are not
707 target dependent. They are all set to addr with a couple of
708 exceptions. The exceptions are sysvr4 shared libraries, whose
709 offsets are kept in solib structures anyway and rs6000 xcoff
710 which handles shared libraries in a completely unique way.
712 Section offsets are built similarly, except that they are built
713 by adding addr in all cases because there is no clear mapping
714 from section_offsets into actual sections. Note that solib.c
715 has a different algorithm for finding section offsets.
717 These should probably all be collapsed into some target
718 independent form of shared library support. FIXME. */
722 struct obj_section
*s
;
724 /* Map section offsets in "addr" back to the object's
725 sections by comparing the section names with bfd's
726 section names. Then adjust the section address by
727 the offset. */ /* for gdb/13815 */
729 ALL_OBJFILE_OSECTIONS (objfile
, s
)
731 CORE_ADDR s_addr
= 0;
735 !s_addr
&& i
< MAX_SECTIONS
&& addrs
->other
[i
].name
;
737 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
739 addrs
->other
[i
].name
) == 0)
740 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
742 s
->addr
-= s
->offset
;
744 s
->endaddr
-= s
->offset
;
745 s
->endaddr
+= s_addr
;
749 #endif /* not IBM6000_TARGET */
751 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
753 if (!have_partial_symbols () && !have_full_symbols ())
756 printf_filtered ("(no debugging symbols found)...");
760 /* Don't allow char * to have a typename (else would get caddr_t).
761 Ditto void *. FIXME: Check whether this is now done by all the
762 symbol readers themselves (many of them now do), and if so remove
765 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
766 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
768 /* Mark the objfile has having had initial symbol read attempted. Note
769 that this does not mean we found any symbols... */
771 objfile
->flags
|= OBJF_SYMS
;
773 /* Discard cleanups as symbol reading was successful. */
775 discard_cleanups (old_chain
);
777 /* Call this after reading in a new symbol table to give target
778 dependent code a crack at the new symbols. For instance, this
779 could be used to update the values of target-specific symbols GDB
780 needs to keep track of (such as _sigtramp, or whatever). */
782 TARGET_SYMFILE_POSTREAD (objfile
);
785 /* Perform required actions after either reading in the initial
786 symbols for a new objfile, or mapping in the symbols from a reusable
790 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
793 /* If this is the main symbol file we have to clean up all users of the
794 old main symbol file. Otherwise it is sufficient to fixup all the
795 breakpoints that may have been redefined by this symbol file. */
798 /* OK, make it the "real" symbol file. */
799 symfile_objfile
= objfile
;
801 clear_symtab_users ();
805 breakpoint_re_set ();
808 /* We're done reading the symbol file; finish off complaints. */
809 clear_complaints (&symfile_complaints
, 0, verbo
);
812 /* Process a symbol file, as either the main file or as a dynamically
815 NAME is the file name (which will be tilde-expanded and made
816 absolute herein) (but we don't free or modify NAME itself).
817 FROM_TTY says how verbose to be. MAINLINE specifies whether this
818 is the main symbol file, or whether it's an extra symbol file such
819 as dynamically loaded code. If !mainline, ADDR is the address
820 where the text segment was loaded.
822 Upon success, returns a pointer to the objfile that was added.
823 Upon failure, jumps back to command level (never returns). */
826 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
827 int mainline
, int flags
)
829 struct objfile
*objfile
;
830 struct partial_symtab
*psymtab
;
833 /* Open a bfd for the file, and give user a chance to burp if we'd be
834 interactively wiping out any existing symbols. */
836 abfd
= symfile_bfd_open (name
);
838 if ((have_full_symbols () || have_partial_symbols ())
841 && !query ("Load new symbol table from \"%s\"? ", name
))
842 error ("Not confirmed.");
844 objfile
= allocate_objfile (abfd
, flags
);
846 /* If the objfile uses a mapped symbol file, and we have a psymtab for
847 it, then skip reading any symbols at this time. */
849 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
851 /* We mapped in an existing symbol table file that already has had
852 initial symbol reading performed, so we can skip that part. Notify
853 the user that instead of reading the symbols, they have been mapped.
855 if (from_tty
|| info_verbose
)
857 printf_filtered ("Mapped symbols for %s...", name
);
859 gdb_flush (gdb_stdout
);
861 init_entry_point_info (objfile
);
862 find_sym_fns (objfile
);
866 /* We either created a new mapped symbol table, mapped an existing
867 symbol table file which has not had initial symbol reading
868 performed, or need to read an unmapped symbol table. */
869 if (from_tty
|| info_verbose
)
871 if (pre_add_symbol_hook
)
872 pre_add_symbol_hook (name
);
875 printf_filtered ("Reading symbols from %s...", name
);
877 gdb_flush (gdb_stdout
);
880 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
883 /* We now have at least a partial symbol table. Check to see if the
884 user requested that all symbols be read on initial access via either
885 the gdb startup command line or on a per symbol file basis. Expand
886 all partial symbol tables for this objfile if so. */
888 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
890 if (from_tty
|| info_verbose
)
892 printf_filtered ("expanding to full symbols...");
894 gdb_flush (gdb_stdout
);
897 for (psymtab
= objfile
->psymtabs
;
899 psymtab
= psymtab
->next
)
901 psymtab_to_symtab (psymtab
);
905 if (from_tty
|| info_verbose
)
907 if (post_add_symbol_hook
)
908 post_add_symbol_hook ();
911 printf_filtered ("done.\n");
915 /* We print some messages regardless of whether 'from_tty ||
916 info_verbose' is true, so make sure they go out at the right
918 gdb_flush (gdb_stdout
);
920 if (objfile
->sf
== NULL
)
921 return objfile
; /* No symbols. */
923 new_symfile_objfile (objfile
, mainline
, from_tty
);
925 if (target_new_objfile_hook
)
926 target_new_objfile_hook (objfile
);
931 /* Call symbol_file_add() with default values and update whatever is
932 affected by the loading of a new main().
933 Used when the file is supplied in the gdb command line
934 and by some targets with special loading requirements.
935 The auxiliary function, symbol_file_add_main_1(), has the flags
936 argument for the switches that can only be specified in the symbol_file
940 symbol_file_add_main (char *args
, int from_tty
)
942 symbol_file_add_main_1 (args
, from_tty
, 0);
946 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
948 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
951 RESET_HP_UX_GLOBALS ();
954 /* Getting new symbols may change our opinion about
955 what is frameless. */
956 reinit_frame_cache ();
958 set_initial_language ();
962 symbol_file_clear (int from_tty
)
964 if ((have_full_symbols () || have_partial_symbols ())
966 && !query ("Discard symbol table from `%s'? ",
967 symfile_objfile
->name
))
968 error ("Not confirmed.");
969 free_all_objfiles ();
971 /* solib descriptors may have handles to objfiles. Since their
972 storage has just been released, we'd better wipe the solib
975 #if defined(SOLIB_RESTART)
979 symfile_objfile
= NULL
;
981 printf_unfiltered ("No symbol file now.\n");
983 RESET_HP_UX_GLOBALS ();
987 /* This is the symbol-file command. Read the file, analyze its
988 symbols, and add a struct symtab to a symtab list. The syntax of
989 the command is rather bizarre--(1) buildargv implements various
990 quoting conventions which are undocumented and have little or
991 nothing in common with the way things are quoted (or not quoted)
992 elsewhere in GDB, (2) options are used, which are not generally
993 used in GDB (perhaps "set mapped on", "set readnow on" would be
994 better), (3) the order of options matters, which is contrary to GNU
995 conventions (because it is confusing and inconvenient). */
996 /* Note: ezannoni 2000-04-17. This function used to have support for
997 rombug (see remote-os9k.c). It consisted of a call to target_link()
998 (target.c) to get the address of the text segment from the target,
999 and pass that to symbol_file_add(). This is no longer supported. */
1002 symbol_file_command (char *args
, int from_tty
)
1006 struct cleanup
*cleanups
;
1007 int flags
= OBJF_USERLOADED
;
1013 symbol_file_clear (from_tty
);
1017 if ((argv
= buildargv (args
)) == NULL
)
1021 cleanups
= make_cleanup_freeargv (argv
);
1022 while (*argv
!= NULL
)
1024 if (STREQ (*argv
, "-mapped"))
1025 flags
|= OBJF_MAPPED
;
1027 if (STREQ (*argv
, "-readnow"))
1028 flags
|= OBJF_READNOW
;
1031 error ("unknown option `%s'", *argv
);
1036 symbol_file_add_main_1 (name
, from_tty
, flags
);
1043 error ("no symbol file name was specified");
1045 do_cleanups (cleanups
);
1049 /* Set the initial language.
1051 A better solution would be to record the language in the psymtab when reading
1052 partial symbols, and then use it (if known) to set the language. This would
1053 be a win for formats that encode the language in an easily discoverable place,
1054 such as DWARF. For stabs, we can jump through hoops looking for specially
1055 named symbols or try to intuit the language from the specific type of stabs
1056 we find, but we can't do that until later when we read in full symbols.
1060 set_initial_language (void)
1062 struct partial_symtab
*pst
;
1063 enum language lang
= language_unknown
;
1065 pst
= find_main_psymtab ();
1068 if (pst
->filename
!= NULL
)
1070 lang
= deduce_language_from_filename (pst
->filename
);
1072 if (lang
== language_unknown
)
1074 /* Make C the default language */
1077 set_language (lang
);
1078 expected_language
= current_language
; /* Don't warn the user */
1082 /* Open file specified by NAME and hand it off to BFD for preliminary
1083 analysis. Result is a newly initialized bfd *, which includes a newly
1084 malloc'd` copy of NAME (tilde-expanded and made absolute).
1085 In case of trouble, error() is called. */
1088 symfile_bfd_open (char *name
)
1092 char *absolute_name
;
1096 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1098 /* Look down path for it, allocate 2nd new malloc'd copy. */
1099 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1100 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1103 char *exename
= alloca (strlen (name
) + 5);
1104 strcat (strcpy (exename
, name
), ".exe");
1105 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1111 make_cleanup (xfree
, name
);
1112 perror_with_name (name
);
1114 xfree (name
); /* Free 1st new malloc'd copy */
1115 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1116 /* It'll be freed in free_objfile(). */
1118 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1122 make_cleanup (xfree
, name
);
1123 error ("\"%s\": can't open to read symbols: %s.", name
,
1124 bfd_errmsg (bfd_get_error ()));
1126 sym_bfd
->cacheable
= 1;
1128 if (!bfd_check_format (sym_bfd
, bfd_object
))
1130 /* FIXME: should be checking for errors from bfd_close (for one thing,
1131 on error it does not free all the storage associated with the
1133 bfd_close (sym_bfd
); /* This also closes desc */
1134 make_cleanup (xfree
, name
);
1135 error ("\"%s\": can't read symbols: %s.", name
,
1136 bfd_errmsg (bfd_get_error ()));
1141 /* Return the section index for the given section name. Return -1 if
1142 the section was not found. */
1144 get_section_index (struct objfile
*objfile
, char *section_name
)
1146 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1153 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1154 startup by the _initialize routine in each object file format reader,
1155 to register information about each format the the reader is prepared
1159 add_symtab_fns (struct sym_fns
*sf
)
1161 sf
->next
= symtab_fns
;
1166 /* Initialize to read symbols from the symbol file sym_bfd. It either
1167 returns or calls error(). The result is an initialized struct sym_fns
1168 in the objfile structure, that contains cached information about the
1172 find_sym_fns (struct objfile
*objfile
)
1175 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1176 char *our_target
= bfd_get_target (objfile
->obfd
);
1178 if (our_flavour
== bfd_target_srec_flavour
1179 || our_flavour
== bfd_target_ihex_flavour
1180 || our_flavour
== bfd_target_tekhex_flavour
)
1181 return; /* No symbols. */
1183 /* Special kludge for apollo. See dstread.c. */
1184 if (STREQN (our_target
, "apollo", 6))
1185 our_flavour
= (enum bfd_flavour
) -2;
1187 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1189 if (our_flavour
== sf
->sym_flavour
)
1195 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1196 bfd_get_target (objfile
->obfd
));
1199 /* This function runs the load command of our current target. */
1202 load_command (char *arg
, int from_tty
)
1205 arg
= get_exec_file (1);
1206 target_load (arg
, from_tty
);
1208 /* After re-loading the executable, we don't really know which
1209 overlays are mapped any more. */
1210 overlay_cache_invalid
= 1;
1213 /* This version of "load" should be usable for any target. Currently
1214 it is just used for remote targets, not inftarg.c or core files,
1215 on the theory that only in that case is it useful.
1217 Avoiding xmodem and the like seems like a win (a) because we don't have
1218 to worry about finding it, and (b) On VMS, fork() is very slow and so
1219 we don't want to run a subprocess. On the other hand, I'm not sure how
1220 performance compares. */
1222 static int download_write_size
= 512;
1223 static int validate_download
= 0;
1225 /* Callback service function for generic_load (bfd_map_over_sections). */
1228 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1230 bfd_size_type
*sum
= data
;
1232 *sum
+= bfd_get_section_size_before_reloc (asec
);
1235 /* Opaque data for load_section_callback. */
1236 struct load_section_data
{
1237 unsigned long load_offset
;
1238 unsigned long write_count
;
1239 unsigned long data_count
;
1240 bfd_size_type total_size
;
1243 /* Callback service function for generic_load (bfd_map_over_sections). */
1246 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1248 struct load_section_data
*args
= data
;
1250 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1252 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1256 struct cleanup
*old_chain
;
1257 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1258 bfd_size_type block_size
;
1260 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1263 if (download_write_size
> 0 && size
> download_write_size
)
1264 block_size
= download_write_size
;
1268 buffer
= xmalloc (size
);
1269 old_chain
= make_cleanup (xfree
, buffer
);
1271 /* Is this really necessary? I guess it gives the user something
1272 to look at during a long download. */
1273 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1274 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1276 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1282 bfd_size_type this_transfer
= size
- sent
;
1284 if (this_transfer
>= block_size
)
1285 this_transfer
= block_size
;
1286 len
= target_write_memory_partial (lma
, buffer
,
1287 this_transfer
, &err
);
1290 if (validate_download
)
1292 /* Broken memories and broken monitors manifest
1293 themselves here when bring new computers to
1294 life. This doubles already slow downloads. */
1295 /* NOTE: cagney/1999-10-18: A more efficient
1296 implementation might add a verify_memory()
1297 method to the target vector and then use
1298 that. remote.c could implement that method
1299 using the ``qCRC'' packet. */
1300 char *check
= xmalloc (len
);
1301 struct cleanup
*verify_cleanups
=
1302 make_cleanup (xfree
, check
);
1304 if (target_read_memory (lma
, check
, len
) != 0)
1305 error ("Download verify read failed at 0x%s",
1307 if (memcmp (buffer
, check
, len
) != 0)
1308 error ("Download verify compare failed at 0x%s",
1310 do_cleanups (verify_cleanups
);
1312 args
->data_count
+= len
;
1315 args
->write_count
+= 1;
1318 || (ui_load_progress_hook
!= NULL
1319 && ui_load_progress_hook (sect_name
, sent
)))
1320 error ("Canceled the download");
1322 if (show_load_progress
!= NULL
)
1323 show_load_progress (sect_name
, sent
, size
,
1324 args
->data_count
, args
->total_size
);
1326 while (sent
< size
);
1329 error ("Memory access error while loading section %s.", sect_name
);
1331 do_cleanups (old_chain
);
1337 generic_load (char *args
, int from_tty
)
1341 time_t start_time
, end_time
; /* Start and end times of download */
1343 struct cleanup
*old_cleanups
;
1345 struct load_section_data cbdata
;
1348 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1349 cbdata
.write_count
= 0; /* Number of writes needed. */
1350 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1351 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1353 /* Parse the input argument - the user can specify a load offset as
1354 a second argument. */
1355 filename
= xmalloc (strlen (args
) + 1);
1356 old_cleanups
= make_cleanup (xfree
, filename
);
1357 strcpy (filename
, args
);
1358 offptr
= strchr (filename
, ' ');
1363 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1364 if (offptr
== endptr
)
1365 error ("Invalid download offset:%s\n", offptr
);
1369 cbdata
.load_offset
= 0;
1371 /* Open the file for loading. */
1372 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1373 if (loadfile_bfd
== NULL
)
1375 perror_with_name (filename
);
1379 /* FIXME: should be checking for errors from bfd_close (for one thing,
1380 on error it does not free all the storage associated with the
1382 make_cleanup_bfd_close (loadfile_bfd
);
1384 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1386 error ("\"%s\" is not an object file: %s", filename
,
1387 bfd_errmsg (bfd_get_error ()));
1390 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1391 (void *) &cbdata
.total_size
);
1393 start_time
= time (NULL
);
1395 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1397 end_time
= time (NULL
);
1399 entry
= bfd_get_start_address (loadfile_bfd
);
1400 ui_out_text (uiout
, "Start address ");
1401 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1402 ui_out_text (uiout
, ", load size ");
1403 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1404 ui_out_text (uiout
, "\n");
1405 /* We were doing this in remote-mips.c, I suspect it is right
1406 for other targets too. */
1409 /* FIXME: are we supposed to call symbol_file_add or not? According to
1410 a comment from remote-mips.c (where a call to symbol_file_add was
1411 commented out), making the call confuses GDB if more than one file is
1412 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1415 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1416 cbdata
.write_count
, end_time
- start_time
);
1418 do_cleanups (old_cleanups
);
1421 /* Report how fast the transfer went. */
1423 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1424 replaced by print_transfer_performance (with a very different
1425 function signature). */
1428 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1431 print_transfer_performance (gdb_stdout
, data_count
,
1432 end_time
- start_time
, 0);
1436 print_transfer_performance (struct ui_file
*stream
,
1437 unsigned long data_count
,
1438 unsigned long write_count
,
1439 unsigned long time_count
)
1441 ui_out_text (uiout
, "Transfer rate: ");
1444 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1445 (data_count
* 8) / time_count
);
1446 ui_out_text (uiout
, " bits/sec");
1450 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1451 ui_out_text (uiout
, " bits in <1 sec");
1453 if (write_count
> 0)
1455 ui_out_text (uiout
, ", ");
1456 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1457 ui_out_text (uiout
, " bytes/write");
1459 ui_out_text (uiout
, ".\n");
1462 /* This function allows the addition of incrementally linked object files.
1463 It does not modify any state in the target, only in the debugger. */
1464 /* Note: ezannoni 2000-04-13 This function/command used to have a
1465 special case syntax for the rombug target (Rombug is the boot
1466 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1467 rombug case, the user doesn't need to supply a text address,
1468 instead a call to target_link() (in target.c) would supply the
1469 value to use. We are now discontinuing this type of ad hoc syntax. */
1473 add_symbol_file_command (char *args
, int from_tty
)
1475 char *filename
= NULL
;
1476 int flags
= OBJF_USERLOADED
;
1478 int expecting_option
= 0;
1479 int section_index
= 0;
1483 int expecting_sec_name
= 0;
1484 int expecting_sec_addr
= 0;
1490 } sect_opts
[SECT_OFF_MAX
];
1492 struct section_addr_info section_addrs
;
1493 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1498 error ("add-symbol-file takes a file name and an address");
1500 /* Make a copy of the string that we can safely write into. */
1501 args
= xstrdup (args
);
1503 /* Ensure section_addrs is initialized */
1504 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1506 while (*args
!= '\000')
1508 /* Any leading spaces? */
1509 while (isspace (*args
))
1512 /* Point arg to the beginning of the argument. */
1515 /* Move args pointer over the argument. */
1516 while ((*args
!= '\000') && !isspace (*args
))
1519 /* If there are more arguments, terminate arg and
1521 if (*args
!= '\000')
1524 /* Now process the argument. */
1527 /* The first argument is the file name. */
1528 filename
= tilde_expand (arg
);
1529 make_cleanup (xfree
, filename
);
1534 /* The second argument is always the text address at which
1535 to load the program. */
1536 sect_opts
[section_index
].name
= ".text";
1537 sect_opts
[section_index
].value
= arg
;
1542 /* It's an option (starting with '-') or it's an argument
1547 if (strcmp (arg
, "-mapped") == 0)
1548 flags
|= OBJF_MAPPED
;
1550 if (strcmp (arg
, "-readnow") == 0)
1551 flags
|= OBJF_READNOW
;
1553 if (strcmp (arg
, "-s") == 0)
1555 if (section_index
>= SECT_OFF_MAX
)
1556 error ("Too many sections specified.");
1557 expecting_sec_name
= 1;
1558 expecting_sec_addr
= 1;
1563 if (expecting_sec_name
)
1565 sect_opts
[section_index
].name
= arg
;
1566 expecting_sec_name
= 0;
1569 if (expecting_sec_addr
)
1571 sect_opts
[section_index
].value
= arg
;
1572 expecting_sec_addr
= 0;
1576 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1582 /* Print the prompt for the query below. And save the arguments into
1583 a sect_addr_info structure to be passed around to other
1584 functions. We have to split this up into separate print
1585 statements because local_hex_string returns a local static
1588 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1589 for (i
= 0; i
< section_index
; i
++)
1592 char *val
= sect_opts
[i
].value
;
1593 char *sec
= sect_opts
[i
].name
;
1595 val
= sect_opts
[i
].value
;
1596 if (val
[0] == '0' && val
[1] == 'x')
1597 addr
= strtoul (val
+2, NULL
, 16);
1599 addr
= strtoul (val
, NULL
, 10);
1601 /* Here we store the section offsets in the order they were
1602 entered on the command line. */
1603 section_addrs
.other
[sec_num
].name
= sec
;
1604 section_addrs
.other
[sec_num
].addr
= addr
;
1605 printf_filtered ("\t%s_addr = %s\n",
1607 local_hex_string ((unsigned long)addr
));
1610 /* The object's sections are initialized when a
1611 call is made to build_objfile_section_table (objfile).
1612 This happens in reread_symbols.
1613 At this point, we don't know what file type this is,
1614 so we can't determine what section names are valid. */
1617 if (from_tty
&& (!query ("%s", "")))
1618 error ("Not confirmed.");
1620 symbol_file_add (filename
, from_tty
, §ion_addrs
, 0, flags
);
1622 /* Getting new symbols may change our opinion about what is
1624 reinit_frame_cache ();
1625 do_cleanups (my_cleanups
);
1629 add_shared_symbol_files_command (char *args
, int from_tty
)
1631 #ifdef ADD_SHARED_SYMBOL_FILES
1632 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1634 error ("This command is not available in this configuration of GDB.");
1638 /* Re-read symbols if a symbol-file has changed. */
1640 reread_symbols (void)
1642 struct objfile
*objfile
;
1645 struct stat new_statbuf
;
1648 /* With the addition of shared libraries, this should be modified,
1649 the load time should be saved in the partial symbol tables, since
1650 different tables may come from different source files. FIXME.
1651 This routine should then walk down each partial symbol table
1652 and see if the symbol table that it originates from has been changed */
1654 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1658 #ifdef IBM6000_TARGET
1659 /* If this object is from a shared library, then you should
1660 stat on the library name, not member name. */
1662 if (objfile
->obfd
->my_archive
)
1663 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1666 res
= stat (objfile
->name
, &new_statbuf
);
1669 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1670 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1674 new_modtime
= new_statbuf
.st_mtime
;
1675 if (new_modtime
!= objfile
->mtime
)
1677 struct cleanup
*old_cleanups
;
1678 struct section_offsets
*offsets
;
1680 char *obfd_filename
;
1682 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1685 /* There are various functions like symbol_file_add,
1686 symfile_bfd_open, syms_from_objfile, etc., which might
1687 appear to do what we want. But they have various other
1688 effects which we *don't* want. So we just do stuff
1689 ourselves. We don't worry about mapped files (for one thing,
1690 any mapped file will be out of date). */
1692 /* If we get an error, blow away this objfile (not sure if
1693 that is the correct response for things like shared
1695 old_cleanups
= make_cleanup_free_objfile (objfile
);
1696 /* We need to do this whenever any symbols go away. */
1697 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1699 /* Clean up any state BFD has sitting around. We don't need
1700 to close the descriptor but BFD lacks a way of closing the
1701 BFD without closing the descriptor. */
1702 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1703 if (!bfd_close (objfile
->obfd
))
1704 error ("Can't close BFD for %s: %s", objfile
->name
,
1705 bfd_errmsg (bfd_get_error ()));
1706 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1707 if (objfile
->obfd
== NULL
)
1708 error ("Can't open %s to read symbols.", objfile
->name
);
1709 /* bfd_openr sets cacheable to true, which is what we want. */
1710 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1711 error ("Can't read symbols from %s: %s.", objfile
->name
,
1712 bfd_errmsg (bfd_get_error ()));
1714 /* Save the offsets, we will nuke them with the rest of the
1716 num_offsets
= objfile
->num_sections
;
1717 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1718 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1720 /* Nuke all the state that we will re-read. Much of the following
1721 code which sets things to NULL really is necessary to tell
1722 other parts of GDB that there is nothing currently there. */
1724 /* FIXME: Do we have to free a whole linked list, or is this
1726 if (objfile
->global_psymbols
.list
)
1727 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1728 memset (&objfile
->global_psymbols
, 0,
1729 sizeof (objfile
->global_psymbols
));
1730 if (objfile
->static_psymbols
.list
)
1731 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1732 memset (&objfile
->static_psymbols
, 0,
1733 sizeof (objfile
->static_psymbols
));
1735 /* Free the obstacks for non-reusable objfiles */
1736 bcache_xfree (objfile
->psymbol_cache
);
1737 objfile
->psymbol_cache
= bcache_xmalloc ();
1738 bcache_xfree (objfile
->macro_cache
);
1739 objfile
->macro_cache
= bcache_xmalloc ();
1740 obstack_free (&objfile
->psymbol_obstack
, 0);
1741 obstack_free (&objfile
->symbol_obstack
, 0);
1742 obstack_free (&objfile
->type_obstack
, 0);
1743 objfile
->sections
= NULL
;
1744 objfile
->symtabs
= NULL
;
1745 objfile
->psymtabs
= NULL
;
1746 objfile
->free_psymtabs
= NULL
;
1747 objfile
->msymbols
= NULL
;
1748 objfile
->minimal_symbol_count
= 0;
1749 memset (&objfile
->msymbol_hash
, 0,
1750 sizeof (objfile
->msymbol_hash
));
1751 memset (&objfile
->msymbol_demangled_hash
, 0,
1752 sizeof (objfile
->msymbol_demangled_hash
));
1753 objfile
->fundamental_types
= NULL
;
1754 if (objfile
->sf
!= NULL
)
1756 (*objfile
->sf
->sym_finish
) (objfile
);
1759 /* We never make this a mapped file. */
1761 /* obstack_specify_allocation also initializes the obstack so
1763 objfile
->psymbol_cache
= bcache_xmalloc ();
1764 objfile
->macro_cache
= bcache_xmalloc ();
1765 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1767 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1769 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1771 if (build_objfile_section_table (objfile
))
1773 error ("Can't find the file sections in `%s': %s",
1774 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1777 /* We use the same section offsets as from last time. I'm not
1778 sure whether that is always correct for shared libraries. */
1779 objfile
->section_offsets
= (struct section_offsets
*)
1780 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1781 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1782 objfile
->num_sections
= num_offsets
;
1784 /* What the hell is sym_new_init for, anyway? The concept of
1785 distinguishing between the main file and additional files
1786 in this way seems rather dubious. */
1787 if (objfile
== symfile_objfile
)
1789 (*objfile
->sf
->sym_new_init
) (objfile
);
1791 RESET_HP_UX_GLOBALS ();
1795 (*objfile
->sf
->sym_init
) (objfile
);
1796 clear_complaints (&symfile_complaints
, 1, 1);
1797 /* The "mainline" parameter is a hideous hack; I think leaving it
1798 zero is OK since dbxread.c also does what it needs to do if
1799 objfile->global_psymbols.size is 0. */
1800 (*objfile
->sf
->sym_read
) (objfile
, 0);
1801 if (!have_partial_symbols () && !have_full_symbols ())
1804 printf_filtered ("(no debugging symbols found)\n");
1807 objfile
->flags
|= OBJF_SYMS
;
1809 /* We're done reading the symbol file; finish off complaints. */
1810 clear_complaints (&symfile_complaints
, 0, 1);
1812 /* Getting new symbols may change our opinion about what is
1815 reinit_frame_cache ();
1817 /* Discard cleanups as symbol reading was successful. */
1818 discard_cleanups (old_cleanups
);
1820 /* If the mtime has changed between the time we set new_modtime
1821 and now, we *want* this to be out of date, so don't call stat
1823 objfile
->mtime
= new_modtime
;
1826 /* Call this after reading in a new symbol table to give target
1827 dependent code a crack at the new symbols. For instance, this
1828 could be used to update the values of target-specific symbols GDB
1829 needs to keep track of (such as _sigtramp, or whatever). */
1831 TARGET_SYMFILE_POSTREAD (objfile
);
1837 clear_symtab_users ();
1849 static filename_language
*filename_language_table
;
1850 static int fl_table_size
, fl_table_next
;
1853 add_filename_language (char *ext
, enum language lang
)
1855 if (fl_table_next
>= fl_table_size
)
1857 fl_table_size
+= 10;
1858 filename_language_table
=
1859 xrealloc (filename_language_table
,
1860 fl_table_size
* sizeof (*filename_language_table
));
1863 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
1864 filename_language_table
[fl_table_next
].lang
= lang
;
1868 static char *ext_args
;
1871 set_ext_lang_command (char *args
, int from_tty
)
1874 char *cp
= ext_args
;
1877 /* First arg is filename extension, starting with '.' */
1879 error ("'%s': Filename extension must begin with '.'", ext_args
);
1881 /* Find end of first arg. */
1882 while (*cp
&& !isspace (*cp
))
1886 error ("'%s': two arguments required -- filename extension and language",
1889 /* Null-terminate first arg */
1892 /* Find beginning of second arg, which should be a source language. */
1893 while (*cp
&& isspace (*cp
))
1897 error ("'%s': two arguments required -- filename extension and language",
1900 /* Lookup the language from among those we know. */
1901 lang
= language_enum (cp
);
1903 /* Now lookup the filename extension: do we already know it? */
1904 for (i
= 0; i
< fl_table_next
; i
++)
1905 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1908 if (i
>= fl_table_next
)
1910 /* new file extension */
1911 add_filename_language (ext_args
, lang
);
1915 /* redefining a previously known filename extension */
1918 /* query ("Really make files of type %s '%s'?", */
1919 /* ext_args, language_str (lang)); */
1921 xfree (filename_language_table
[i
].ext
);
1922 filename_language_table
[i
].ext
= xstrdup (ext_args
);
1923 filename_language_table
[i
].lang
= lang
;
1928 info_ext_lang_command (char *args
, int from_tty
)
1932 printf_filtered ("Filename extensions and the languages they represent:");
1933 printf_filtered ("\n\n");
1934 for (i
= 0; i
< fl_table_next
; i
++)
1935 printf_filtered ("\t%s\t- %s\n",
1936 filename_language_table
[i
].ext
,
1937 language_str (filename_language_table
[i
].lang
));
1941 init_filename_language_table (void)
1943 if (fl_table_size
== 0) /* protect against repetition */
1947 filename_language_table
=
1948 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1949 add_filename_language (".c", language_c
);
1950 add_filename_language (".C", language_cplus
);
1951 add_filename_language (".cc", language_cplus
);
1952 add_filename_language (".cp", language_cplus
);
1953 add_filename_language (".cpp", language_cplus
);
1954 add_filename_language (".cxx", language_cplus
);
1955 add_filename_language (".c++", language_cplus
);
1956 add_filename_language (".java", language_java
);
1957 add_filename_language (".class", language_java
);
1958 /* OBSOLETE add_filename_language (".ch", language_chill); */
1959 /* OBSOLETE add_filename_language (".c186", language_chill); */
1960 /* OBSOLETE add_filename_language (".c286", language_chill); */
1961 add_filename_language (".m", language_objc
);
1962 add_filename_language (".f", language_fortran
);
1963 add_filename_language (".F", language_fortran
);
1964 add_filename_language (".s", language_asm
);
1965 add_filename_language (".S", language_asm
);
1966 add_filename_language (".pas", language_pascal
);
1967 add_filename_language (".p", language_pascal
);
1968 add_filename_language (".pp", language_pascal
);
1973 deduce_language_from_filename (char *filename
)
1978 if (filename
!= NULL
)
1979 if ((cp
= strrchr (filename
, '.')) != NULL
)
1980 for (i
= 0; i
< fl_table_next
; i
++)
1981 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1982 return filename_language_table
[i
].lang
;
1984 return language_unknown
;
1989 Allocate and partly initialize a new symbol table. Return a pointer
1990 to it. error() if no space.
1992 Caller must set these fields:
1998 possibly free_named_symtabs (symtab->filename);
2002 allocate_symtab (char *filename
, struct objfile
*objfile
)
2004 register struct symtab
*symtab
;
2006 symtab
= (struct symtab
*)
2007 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
2008 memset (symtab
, 0, sizeof (*symtab
));
2009 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2010 &objfile
->symbol_obstack
);
2011 symtab
->fullname
= NULL
;
2012 symtab
->language
= deduce_language_from_filename (filename
);
2013 symtab
->debugformat
= obsavestring ("unknown", 7,
2014 &objfile
->symbol_obstack
);
2016 /* Hook it to the objfile it comes from */
2018 symtab
->objfile
= objfile
;
2019 symtab
->next
= objfile
->symtabs
;
2020 objfile
->symtabs
= symtab
;
2022 /* FIXME: This should go away. It is only defined for the Z8000,
2023 and the Z8000 definition of this macro doesn't have anything to
2024 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2025 here for convenience. */
2026 #ifdef INIT_EXTRA_SYMTAB_INFO
2027 INIT_EXTRA_SYMTAB_INFO (symtab
);
2033 struct partial_symtab
*
2034 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2036 struct partial_symtab
*psymtab
;
2038 if (objfile
->free_psymtabs
)
2040 psymtab
= objfile
->free_psymtabs
;
2041 objfile
->free_psymtabs
= psymtab
->next
;
2044 psymtab
= (struct partial_symtab
*)
2045 obstack_alloc (&objfile
->psymbol_obstack
,
2046 sizeof (struct partial_symtab
));
2048 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2049 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2050 &objfile
->psymbol_obstack
);
2051 psymtab
->symtab
= NULL
;
2053 /* Prepend it to the psymtab list for the objfile it belongs to.
2054 Psymtabs are searched in most recent inserted -> least recent
2057 psymtab
->objfile
= objfile
;
2058 psymtab
->next
= objfile
->psymtabs
;
2059 objfile
->psymtabs
= psymtab
;
2062 struct partial_symtab
**prev_pst
;
2063 psymtab
->objfile
= objfile
;
2064 psymtab
->next
= NULL
;
2065 prev_pst
= &(objfile
->psymtabs
);
2066 while ((*prev_pst
) != NULL
)
2067 prev_pst
= &((*prev_pst
)->next
);
2068 (*prev_pst
) = psymtab
;
2076 discard_psymtab (struct partial_symtab
*pst
)
2078 struct partial_symtab
**prev_pst
;
2081 Empty psymtabs happen as a result of header files which don't
2082 have any symbols in them. There can be a lot of them. But this
2083 check is wrong, in that a psymtab with N_SLINE entries but
2084 nothing else is not empty, but we don't realize that. Fixing
2085 that without slowing things down might be tricky. */
2087 /* First, snip it out of the psymtab chain */
2089 prev_pst
= &(pst
->objfile
->psymtabs
);
2090 while ((*prev_pst
) != pst
)
2091 prev_pst
= &((*prev_pst
)->next
);
2092 (*prev_pst
) = pst
->next
;
2094 /* Next, put it on a free list for recycling */
2096 pst
->next
= pst
->objfile
->free_psymtabs
;
2097 pst
->objfile
->free_psymtabs
= pst
;
2101 /* Reset all data structures in gdb which may contain references to symbol
2105 clear_symtab_users (void)
2107 /* Someday, we should do better than this, by only blowing away
2108 the things that really need to be blown. */
2109 clear_value_history ();
2111 clear_internalvars ();
2112 breakpoint_re_set ();
2113 set_default_breakpoint (0, 0, 0, 0);
2114 clear_current_source_symtab_and_line ();
2115 clear_pc_function_cache ();
2116 if (target_new_objfile_hook
)
2117 target_new_objfile_hook (NULL
);
2121 clear_symtab_users_cleanup (void *ignore
)
2123 clear_symtab_users ();
2126 /* clear_symtab_users_once:
2128 This function is run after symbol reading, or from a cleanup.
2129 If an old symbol table was obsoleted, the old symbol table
2130 has been blown away, but the other GDB data structures that may
2131 reference it have not yet been cleared or re-directed. (The old
2132 symtab was zapped, and the cleanup queued, in free_named_symtab()
2135 This function can be queued N times as a cleanup, or called
2136 directly; it will do all the work the first time, and then will be a
2137 no-op until the next time it is queued. This works by bumping a
2138 counter at queueing time. Much later when the cleanup is run, or at
2139 the end of symbol processing (in case the cleanup is discarded), if
2140 the queued count is greater than the "done-count", we do the work
2141 and set the done-count to the queued count. If the queued count is
2142 less than or equal to the done-count, we just ignore the call. This
2143 is needed because reading a single .o file will often replace many
2144 symtabs (one per .h file, for example), and we don't want to reset
2145 the breakpoints N times in the user's face.
2147 The reason we both queue a cleanup, and call it directly after symbol
2148 reading, is because the cleanup protects us in case of errors, but is
2149 discarded if symbol reading is successful. */
2152 /* FIXME: As free_named_symtabs is currently a big noop this function
2153 is no longer needed. */
2154 static void clear_symtab_users_once (void);
2156 static int clear_symtab_users_queued
;
2157 static int clear_symtab_users_done
;
2160 clear_symtab_users_once (void)
2162 /* Enforce once-per-`do_cleanups'-semantics */
2163 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2165 clear_symtab_users_done
= clear_symtab_users_queued
;
2167 clear_symtab_users ();
2171 /* Delete the specified psymtab, and any others that reference it. */
2174 cashier_psymtab (struct partial_symtab
*pst
)
2176 struct partial_symtab
*ps
, *pprev
= NULL
;
2179 /* Find its previous psymtab in the chain */
2180 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2189 /* Unhook it from the chain. */
2190 if (ps
== pst
->objfile
->psymtabs
)
2191 pst
->objfile
->psymtabs
= ps
->next
;
2193 pprev
->next
= ps
->next
;
2195 /* FIXME, we can't conveniently deallocate the entries in the
2196 partial_symbol lists (global_psymbols/static_psymbols) that
2197 this psymtab points to. These just take up space until all
2198 the psymtabs are reclaimed. Ditto the dependencies list and
2199 filename, which are all in the psymbol_obstack. */
2201 /* We need to cashier any psymtab that has this one as a dependency... */
2203 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2205 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2207 if (ps
->dependencies
[i
] == pst
)
2209 cashier_psymtab (ps
);
2210 goto again
; /* Must restart, chain has been munged. */
2217 /* If a symtab or psymtab for filename NAME is found, free it along
2218 with any dependent breakpoints, displays, etc.
2219 Used when loading new versions of object modules with the "add-file"
2220 command. This is only called on the top-level symtab or psymtab's name;
2221 it is not called for subsidiary files such as .h files.
2223 Return value is 1 if we blew away the environment, 0 if not.
2224 FIXME. The return value appears to never be used.
2226 FIXME. I think this is not the best way to do this. We should
2227 work on being gentler to the environment while still cleaning up
2228 all stray pointers into the freed symtab. */
2231 free_named_symtabs (char *name
)
2234 /* FIXME: With the new method of each objfile having it's own
2235 psymtab list, this function needs serious rethinking. In particular,
2236 why was it ever necessary to toss psymtabs with specific compilation
2237 unit filenames, as opposed to all psymtabs from a particular symbol
2239 Well, the answer is that some systems permit reloading of particular
2240 compilation units. We want to blow away any old info about these
2241 compilation units, regardless of which objfiles they arrived in. --gnu. */
2243 register struct symtab
*s
;
2244 register struct symtab
*prev
;
2245 register struct partial_symtab
*ps
;
2246 struct blockvector
*bv
;
2249 /* We only wack things if the symbol-reload switch is set. */
2250 if (!symbol_reloading
)
2253 /* Some symbol formats have trouble providing file names... */
2254 if (name
== 0 || *name
== '\0')
2257 /* Look for a psymtab with the specified name. */
2260 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2262 if (STREQ (name
, ps
->filename
))
2264 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2265 goto again2
; /* Must restart, chain has been munged */
2269 /* Look for a symtab with the specified name. */
2271 for (s
= symtab_list
; s
; s
= s
->next
)
2273 if (STREQ (name
, s
->filename
))
2280 if (s
== symtab_list
)
2281 symtab_list
= s
->next
;
2283 prev
->next
= s
->next
;
2285 /* For now, queue a delete for all breakpoints, displays, etc., whether
2286 or not they depend on the symtab being freed. This should be
2287 changed so that only those data structures affected are deleted. */
2289 /* But don't delete anything if the symtab is empty.
2290 This test is necessary due to a bug in "dbxread.c" that
2291 causes empty symtabs to be created for N_SO symbols that
2292 contain the pathname of the object file. (This problem
2293 has been fixed in GDB 3.9x). */
2295 bv
= BLOCKVECTOR (s
);
2296 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2297 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2298 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2300 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2302 clear_symtab_users_queued
++;
2303 make_cleanup (clear_symtab_users_once
, 0);
2308 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2316 /* It is still possible that some breakpoints will be affected
2317 even though no symtab was found, since the file might have
2318 been compiled without debugging, and hence not be associated
2319 with a symtab. In order to handle this correctly, we would need
2320 to keep a list of text address ranges for undebuggable files.
2321 For now, we do nothing, since this is a fairly obscure case. */
2325 /* FIXME, what about the minimal symbol table? */
2332 /* Allocate and partially fill a partial symtab. It will be
2333 completely filled at the end of the symbol list.
2335 FILENAME is the name of the symbol-file we are reading from. */
2337 struct partial_symtab
*
2338 start_psymtab_common (struct objfile
*objfile
,
2339 struct section_offsets
*section_offsets
, char *filename
,
2340 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2341 struct partial_symbol
**static_syms
)
2343 struct partial_symtab
*psymtab
;
2345 psymtab
= allocate_psymtab (filename
, objfile
);
2346 psymtab
->section_offsets
= section_offsets
;
2347 psymtab
->textlow
= textlow
;
2348 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2349 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2350 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2354 /* Add a symbol with a long value to a psymtab.
2355 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2358 add_psymbol_to_list (char *name
, int namelength
, namespace_enum
namespace,
2359 enum address_class
class,
2360 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2361 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2362 enum language language
, struct objfile
*objfile
)
2364 register struct partial_symbol
*psym
;
2365 char *buf
= alloca (namelength
+ 1);
2366 /* psymbol is static so that there will be no uninitialized gaps in the
2367 structure which might contain random data, causing cache misses in
2369 static struct partial_symbol psymbol
;
2371 /* Create local copy of the partial symbol */
2372 memcpy (buf
, name
, namelength
);
2373 buf
[namelength
] = '\0';
2374 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, objfile
->psymbol_cache
);
2375 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2378 SYMBOL_VALUE (&psymbol
) = val
;
2382 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2384 SYMBOL_SECTION (&psymbol
) = 0;
2385 SYMBOL_LANGUAGE (&psymbol
) = language
;
2386 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2387 PSYMBOL_CLASS (&psymbol
) = class;
2388 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2390 /* Stash the partial symbol away in the cache */
2391 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2393 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2394 if (list
->next
>= list
->list
+ list
->size
)
2396 extend_psymbol_list (list
, objfile
);
2398 *list
->next
++ = psym
;
2399 OBJSTAT (objfile
, n_psyms
++);
2402 /* Add a symbol with a long value to a psymtab. This differs from
2403 * add_psymbol_to_list above in taking both a mangled and a demangled
2407 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2408 int dem_namelength
, namespace_enum
namespace,
2409 enum address_class
class,
2410 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2411 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2412 enum language language
,
2413 struct objfile
*objfile
)
2415 register struct partial_symbol
*psym
;
2416 char *buf
= alloca (namelength
+ 1);
2417 /* psymbol is static so that there will be no uninitialized gaps in the
2418 structure which might contain random data, causing cache misses in
2420 static struct partial_symbol psymbol
;
2422 /* Create local copy of the partial symbol */
2424 memcpy (buf
, name
, namelength
);
2425 buf
[namelength
] = '\0';
2426 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, objfile
->psymbol_cache
);
2428 buf
= alloca (dem_namelength
+ 1);
2429 memcpy (buf
, dem_name
, dem_namelength
);
2430 buf
[dem_namelength
] = '\0';
2435 case language_cplus
:
2436 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2437 bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2439 /* OBSOLETE case language_chill: */
2440 /* OBSOLETE SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) = */
2441 /* OBSOLETE bcache (buf, dem_namelength + 1, objfile->psymbol_cache); */
2443 /* FIXME What should be done for the default case? Ignoring for now. */
2446 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2449 SYMBOL_VALUE (&psymbol
) = val
;
2453 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2455 SYMBOL_SECTION (&psymbol
) = 0;
2456 SYMBOL_LANGUAGE (&psymbol
) = language
;
2457 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2458 PSYMBOL_CLASS (&psymbol
) = class;
2459 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2461 /* Stash the partial symbol away in the cache */
2462 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2464 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2465 if (list
->next
>= list
->list
+ list
->size
)
2467 extend_psymbol_list (list
, objfile
);
2469 *list
->next
++ = psym
;
2470 OBJSTAT (objfile
, n_psyms
++);
2473 /* Initialize storage for partial symbols. */
2476 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2478 /* Free any previously allocated psymbol lists. */
2480 if (objfile
->global_psymbols
.list
)
2482 xmfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2484 if (objfile
->static_psymbols
.list
)
2486 xmfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2489 /* Current best guess is that approximately a twentieth
2490 of the total symbols (in a debugging file) are global or static
2493 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2494 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2496 if (objfile
->global_psymbols
.size
> 0)
2498 objfile
->global_psymbols
.next
=
2499 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2500 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2501 * sizeof (struct partial_symbol
*)));
2503 if (objfile
->static_psymbols
.size
> 0)
2505 objfile
->static_psymbols
.next
=
2506 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2507 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2508 * sizeof (struct partial_symbol
*)));
2513 The following code implements an abstraction for debugging overlay sections.
2515 The target model is as follows:
2516 1) The gnu linker will permit multiple sections to be mapped into the
2517 same VMA, each with its own unique LMA (or load address).
2518 2) It is assumed that some runtime mechanism exists for mapping the
2519 sections, one by one, from the load address into the VMA address.
2520 3) This code provides a mechanism for gdb to keep track of which
2521 sections should be considered to be mapped from the VMA to the LMA.
2522 This information is used for symbol lookup, and memory read/write.
2523 For instance, if a section has been mapped then its contents
2524 should be read from the VMA, otherwise from the LMA.
2526 Two levels of debugger support for overlays are available. One is
2527 "manual", in which the debugger relies on the user to tell it which
2528 overlays are currently mapped. This level of support is
2529 implemented entirely in the core debugger, and the information about
2530 whether a section is mapped is kept in the objfile->obj_section table.
2532 The second level of support is "automatic", and is only available if
2533 the target-specific code provides functionality to read the target's
2534 overlay mapping table, and translate its contents for the debugger
2535 (by updating the mapped state information in the obj_section tables).
2537 The interface is as follows:
2539 overlay map <name> -- tell gdb to consider this section mapped
2540 overlay unmap <name> -- tell gdb to consider this section unmapped
2541 overlay list -- list the sections that GDB thinks are mapped
2542 overlay read-target -- get the target's state of what's mapped
2543 overlay off/manual/auto -- set overlay debugging state
2544 Functional interface:
2545 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2546 section, return that section.
2547 find_pc_overlay(pc): find any overlay section that contains
2548 the pc, either in its VMA or its LMA
2549 overlay_is_mapped(sect): true if overlay is marked as mapped
2550 section_is_overlay(sect): true if section's VMA != LMA
2551 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2552 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2553 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2554 overlay_mapped_address(...): map an address from section's LMA to VMA
2555 overlay_unmapped_address(...): map an address from section's VMA to LMA
2556 symbol_overlayed_address(...): Return a "current" address for symbol:
2557 either in VMA or LMA depending on whether
2558 the symbol's section is currently mapped
2561 /* Overlay debugging state: */
2563 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2564 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2566 /* Target vector for refreshing overlay mapped state */
2567 static void simple_overlay_update (struct obj_section
*);
2568 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2570 /* Function: section_is_overlay (SECTION)
2571 Returns true if SECTION has VMA not equal to LMA, ie.
2572 SECTION is loaded at an address different from where it will "run". */
2575 section_is_overlay (asection
*section
)
2577 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2579 if (overlay_debugging
)
2580 if (section
&& section
->lma
!= 0 &&
2581 section
->vma
!= section
->lma
)
2587 /* Function: overlay_invalidate_all (void)
2588 Invalidate the mapped state of all overlay sections (mark it as stale). */
2591 overlay_invalidate_all (void)
2593 struct objfile
*objfile
;
2594 struct obj_section
*sect
;
2596 ALL_OBJSECTIONS (objfile
, sect
)
2597 if (section_is_overlay (sect
->the_bfd_section
))
2598 sect
->ovly_mapped
= -1;
2601 /* Function: overlay_is_mapped (SECTION)
2602 Returns true if section is an overlay, and is currently mapped.
2603 Private: public access is thru function section_is_mapped.
2605 Access to the ovly_mapped flag is restricted to this function, so
2606 that we can do automatic update. If the global flag
2607 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2608 overlay_invalidate_all. If the mapped state of the particular
2609 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2612 overlay_is_mapped (struct obj_section
*osect
)
2614 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2617 switch (overlay_debugging
)
2621 return 0; /* overlay debugging off */
2622 case ovly_auto
: /* overlay debugging automatic */
2623 /* Unles there is a target_overlay_update function,
2624 there's really nothing useful to do here (can't really go auto) */
2625 if (target_overlay_update
)
2627 if (overlay_cache_invalid
)
2629 overlay_invalidate_all ();
2630 overlay_cache_invalid
= 0;
2632 if (osect
->ovly_mapped
== -1)
2633 (*target_overlay_update
) (osect
);
2635 /* fall thru to manual case */
2636 case ovly_on
: /* overlay debugging manual */
2637 return osect
->ovly_mapped
== 1;
2641 /* Function: section_is_mapped
2642 Returns true if section is an overlay, and is currently mapped. */
2645 section_is_mapped (asection
*section
)
2647 struct objfile
*objfile
;
2648 struct obj_section
*osect
;
2650 if (overlay_debugging
)
2651 if (section
&& section_is_overlay (section
))
2652 ALL_OBJSECTIONS (objfile
, osect
)
2653 if (osect
->the_bfd_section
== section
)
2654 return overlay_is_mapped (osect
);
2659 /* Function: pc_in_unmapped_range
2660 If PC falls into the lma range of SECTION, return true, else false. */
2663 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2665 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2669 if (overlay_debugging
)
2670 if (section
&& section_is_overlay (section
))
2672 size
= bfd_get_section_size_before_reloc (section
);
2673 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2679 /* Function: pc_in_mapped_range
2680 If PC falls into the vma range of SECTION, return true, else false. */
2683 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2685 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2689 if (overlay_debugging
)
2690 if (section
&& section_is_overlay (section
))
2692 size
= bfd_get_section_size_before_reloc (section
);
2693 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2700 /* Return true if the mapped ranges of sections A and B overlap, false
2703 sections_overlap (asection
*a
, asection
*b
)
2705 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2707 CORE_ADDR a_start
= a
->vma
;
2708 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
2709 CORE_ADDR b_start
= b
->vma
;
2710 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
2712 return (a_start
< b_end
&& b_start
< a_end
);
2715 /* Function: overlay_unmapped_address (PC, SECTION)
2716 Returns the address corresponding to PC in the unmapped (load) range.
2717 May be the same as PC. */
2720 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2722 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2724 if (overlay_debugging
)
2725 if (section
&& section_is_overlay (section
) &&
2726 pc_in_mapped_range (pc
, section
))
2727 return pc
+ section
->lma
- section
->vma
;
2732 /* Function: overlay_mapped_address (PC, SECTION)
2733 Returns the address corresponding to PC in the mapped (runtime) range.
2734 May be the same as PC. */
2737 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2739 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2741 if (overlay_debugging
)
2742 if (section
&& section_is_overlay (section
) &&
2743 pc_in_unmapped_range (pc
, section
))
2744 return pc
+ section
->vma
- section
->lma
;
2750 /* Function: symbol_overlayed_address
2751 Return one of two addresses (relative to the VMA or to the LMA),
2752 depending on whether the section is mapped or not. */
2755 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2757 if (overlay_debugging
)
2759 /* If the symbol has no section, just return its regular address. */
2762 /* If the symbol's section is not an overlay, just return its address */
2763 if (!section_is_overlay (section
))
2765 /* If the symbol's section is mapped, just return its address */
2766 if (section_is_mapped (section
))
2769 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2770 * then return its LOADED address rather than its vma address!!
2772 return overlay_unmapped_address (address
, section
);
2777 /* Function: find_pc_overlay (PC)
2778 Return the best-match overlay section for PC:
2779 If PC matches a mapped overlay section's VMA, return that section.
2780 Else if PC matches an unmapped section's VMA, return that section.
2781 Else if PC matches an unmapped section's LMA, return that section. */
2784 find_pc_overlay (CORE_ADDR pc
)
2786 struct objfile
*objfile
;
2787 struct obj_section
*osect
, *best_match
= NULL
;
2789 if (overlay_debugging
)
2790 ALL_OBJSECTIONS (objfile
, osect
)
2791 if (section_is_overlay (osect
->the_bfd_section
))
2793 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2795 if (overlay_is_mapped (osect
))
2796 return osect
->the_bfd_section
;
2800 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2803 return best_match
? best_match
->the_bfd_section
: NULL
;
2806 /* Function: find_pc_mapped_section (PC)
2807 If PC falls into the VMA address range of an overlay section that is
2808 currently marked as MAPPED, return that section. Else return NULL. */
2811 find_pc_mapped_section (CORE_ADDR pc
)
2813 struct objfile
*objfile
;
2814 struct obj_section
*osect
;
2816 if (overlay_debugging
)
2817 ALL_OBJSECTIONS (objfile
, osect
)
2818 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2819 overlay_is_mapped (osect
))
2820 return osect
->the_bfd_section
;
2825 /* Function: list_overlays_command
2826 Print a list of mapped sections and their PC ranges */
2829 list_overlays_command (char *args
, int from_tty
)
2832 struct objfile
*objfile
;
2833 struct obj_section
*osect
;
2835 if (overlay_debugging
)
2836 ALL_OBJSECTIONS (objfile
, osect
)
2837 if (overlay_is_mapped (osect
))
2843 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2844 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2845 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2846 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2848 printf_filtered ("Section %s, loaded at ", name
);
2849 print_address_numeric (lma
, 1, gdb_stdout
);
2850 puts_filtered (" - ");
2851 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2852 printf_filtered (", mapped at ");
2853 print_address_numeric (vma
, 1, gdb_stdout
);
2854 puts_filtered (" - ");
2855 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2856 puts_filtered ("\n");
2861 printf_filtered ("No sections are mapped.\n");
2864 /* Function: map_overlay_command
2865 Mark the named section as mapped (ie. residing at its VMA address). */
2868 map_overlay_command (char *args
, int from_tty
)
2870 struct objfile
*objfile
, *objfile2
;
2871 struct obj_section
*sec
, *sec2
;
2874 if (!overlay_debugging
)
2876 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2877 the 'overlay manual' command.");
2879 if (args
== 0 || *args
== 0)
2880 error ("Argument required: name of an overlay section");
2882 /* First, find a section matching the user supplied argument */
2883 ALL_OBJSECTIONS (objfile
, sec
)
2884 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2886 /* Now, check to see if the section is an overlay. */
2887 bfdsec
= sec
->the_bfd_section
;
2888 if (!section_is_overlay (bfdsec
))
2889 continue; /* not an overlay section */
2891 /* Mark the overlay as "mapped" */
2892 sec
->ovly_mapped
= 1;
2894 /* Next, make a pass and unmap any sections that are
2895 overlapped by this new section: */
2896 ALL_OBJSECTIONS (objfile2
, sec2
)
2897 if (sec2
->ovly_mapped
2899 && sec
->the_bfd_section
!= sec2
->the_bfd_section
2900 && sections_overlap (sec
->the_bfd_section
,
2901 sec2
->the_bfd_section
))
2904 printf_filtered ("Note: section %s unmapped by overlap\n",
2905 bfd_section_name (objfile
->obfd
,
2906 sec2
->the_bfd_section
));
2907 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2911 error ("No overlay section called %s", args
);
2914 /* Function: unmap_overlay_command
2915 Mark the overlay section as unmapped
2916 (ie. resident in its LMA address range, rather than the VMA range). */
2919 unmap_overlay_command (char *args
, int from_tty
)
2921 struct objfile
*objfile
;
2922 struct obj_section
*sec
;
2924 if (!overlay_debugging
)
2926 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2927 the 'overlay manual' command.");
2929 if (args
== 0 || *args
== 0)
2930 error ("Argument required: name of an overlay section");
2932 /* First, find a section matching the user supplied argument */
2933 ALL_OBJSECTIONS (objfile
, sec
)
2934 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2936 if (!sec
->ovly_mapped
)
2937 error ("Section %s is not mapped", args
);
2938 sec
->ovly_mapped
= 0;
2941 error ("No overlay section called %s", args
);
2944 /* Function: overlay_auto_command
2945 A utility command to turn on overlay debugging.
2946 Possibly this should be done via a set/show command. */
2949 overlay_auto_command (char *args
, int from_tty
)
2951 overlay_debugging
= ovly_auto
;
2952 enable_overlay_breakpoints ();
2954 printf_filtered ("Automatic overlay debugging enabled.");
2957 /* Function: overlay_manual_command
2958 A utility command to turn on overlay debugging.
2959 Possibly this should be done via a set/show command. */
2962 overlay_manual_command (char *args
, int from_tty
)
2964 overlay_debugging
= ovly_on
;
2965 disable_overlay_breakpoints ();
2967 printf_filtered ("Overlay debugging enabled.");
2970 /* Function: overlay_off_command
2971 A utility command to turn on overlay debugging.
2972 Possibly this should be done via a set/show command. */
2975 overlay_off_command (char *args
, int from_tty
)
2977 overlay_debugging
= ovly_off
;
2978 disable_overlay_breakpoints ();
2980 printf_filtered ("Overlay debugging disabled.");
2984 overlay_load_command (char *args
, int from_tty
)
2986 if (target_overlay_update
)
2987 (*target_overlay_update
) (NULL
);
2989 error ("This target does not know how to read its overlay state.");
2992 /* Function: overlay_command
2993 A place-holder for a mis-typed command */
2995 /* Command list chain containing all defined "overlay" subcommands. */
2996 struct cmd_list_element
*overlaylist
;
2999 overlay_command (char *args
, int from_tty
)
3002 ("\"overlay\" must be followed by the name of an overlay command.\n");
3003 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3007 /* Target Overlays for the "Simplest" overlay manager:
3009 This is GDB's default target overlay layer. It works with the
3010 minimal overlay manager supplied as an example by Cygnus. The
3011 entry point is via a function pointer "target_overlay_update",
3012 so targets that use a different runtime overlay manager can
3013 substitute their own overlay_update function and take over the
3016 The overlay_update function pokes around in the target's data structures
3017 to see what overlays are mapped, and updates GDB's overlay mapping with
3020 In this simple implementation, the target data structures are as follows:
3021 unsigned _novlys; /# number of overlay sections #/
3022 unsigned _ovly_table[_novlys][4] = {
3023 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3024 {..., ..., ..., ...},
3026 unsigned _novly_regions; /# number of overlay regions #/
3027 unsigned _ovly_region_table[_novly_regions][3] = {
3028 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3031 These functions will attempt to update GDB's mappedness state in the
3032 symbol section table, based on the target's mappedness state.
3034 To do this, we keep a cached copy of the target's _ovly_table, and
3035 attempt to detect when the cached copy is invalidated. The main
3036 entry point is "simple_overlay_update(SECT), which looks up SECT in
3037 the cached table and re-reads only the entry for that section from
3038 the target (whenever possible).
3041 /* Cached, dynamically allocated copies of the target data structures: */
3042 static unsigned (*cache_ovly_table
)[4] = 0;
3044 static unsigned (*cache_ovly_region_table
)[3] = 0;
3046 static unsigned cache_novlys
= 0;
3048 static unsigned cache_novly_regions
= 0;
3050 static CORE_ADDR cache_ovly_table_base
= 0;
3052 static CORE_ADDR cache_ovly_region_table_base
= 0;
3056 VMA
, SIZE
, LMA
, MAPPED
3058 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3060 /* Throw away the cached copy of _ovly_table */
3062 simple_free_overlay_table (void)
3064 if (cache_ovly_table
)
3065 xfree (cache_ovly_table
);
3067 cache_ovly_table
= NULL
;
3068 cache_ovly_table_base
= 0;
3072 /* Throw away the cached copy of _ovly_region_table */
3074 simple_free_overlay_region_table (void)
3076 if (cache_ovly_region_table
)
3077 xfree (cache_ovly_region_table
);
3078 cache_novly_regions
= 0;
3079 cache_ovly_region_table
= NULL
;
3080 cache_ovly_region_table_base
= 0;
3084 /* Read an array of ints from the target into a local buffer.
3085 Convert to host order. int LEN is number of ints */
3087 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3089 /* FIXME (alloca): Not safe if array is very large. */
3090 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3093 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3094 for (i
= 0; i
< len
; i
++)
3095 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3099 /* Find and grab a copy of the target _ovly_table
3100 (and _novlys, which is needed for the table's size) */
3102 simple_read_overlay_table (void)
3104 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3106 simple_free_overlay_table ();
3107 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3110 error ("Error reading inferior's overlay table: "
3111 "couldn't find `_novlys' variable\n"
3112 "in inferior. Use `overlay manual' mode.");
3116 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3117 if (! ovly_table_msym
)
3119 error ("Error reading inferior's overlay table: couldn't find "
3120 "`_ovly_table' array\n"
3121 "in inferior. Use `overlay manual' mode.");
3125 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3127 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3128 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3129 read_target_long_array (cache_ovly_table_base
,
3130 (int *) cache_ovly_table
,
3133 return 1; /* SUCCESS */
3137 /* Find and grab a copy of the target _ovly_region_table
3138 (and _novly_regions, which is needed for the table's size) */
3140 simple_read_overlay_region_table (void)
3142 struct minimal_symbol
*msym
;
3144 simple_free_overlay_region_table ();
3145 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3147 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3149 return 0; /* failure */
3150 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3151 if (cache_ovly_region_table
!= NULL
)
3153 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3156 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3157 read_target_long_array (cache_ovly_region_table_base
,
3158 (int *) cache_ovly_region_table
,
3159 cache_novly_regions
* 3);
3162 return 0; /* failure */
3165 return 0; /* failure */
3166 return 1; /* SUCCESS */
3170 /* Function: simple_overlay_update_1
3171 A helper function for simple_overlay_update. Assuming a cached copy
3172 of _ovly_table exists, look through it to find an entry whose vma,
3173 lma and size match those of OSECT. Re-read the entry and make sure
3174 it still matches OSECT (else the table may no longer be valid).
3175 Set OSECT's mapped state to match the entry. Return: 1 for
3176 success, 0 for failure. */
3179 simple_overlay_update_1 (struct obj_section
*osect
)
3182 bfd
*obfd
= osect
->objfile
->obfd
;
3183 asection
*bsect
= osect
->the_bfd_section
;
3185 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3186 for (i
= 0; i
< cache_novlys
; i
++)
3187 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3188 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3189 /* && cache_ovly_table[i][SIZE] == size */ )
3191 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3192 (int *) cache_ovly_table
[i
], 4);
3193 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3194 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3195 /* && cache_ovly_table[i][SIZE] == size */ )
3197 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3200 else /* Warning! Warning! Target's ovly table has changed! */
3206 /* Function: simple_overlay_update
3207 If OSECT is NULL, then update all sections' mapped state
3208 (after re-reading the entire target _ovly_table).
3209 If OSECT is non-NULL, then try to find a matching entry in the
3210 cached ovly_table and update only OSECT's mapped state.
3211 If a cached entry can't be found or the cache isn't valid, then
3212 re-read the entire cache, and go ahead and update all sections. */
3215 simple_overlay_update (struct obj_section
*osect
)
3217 struct objfile
*objfile
;
3219 /* Were we given an osect to look up? NULL means do all of them. */
3221 /* Have we got a cached copy of the target's overlay table? */
3222 if (cache_ovly_table
!= NULL
)
3223 /* Does its cached location match what's currently in the symtab? */
3224 if (cache_ovly_table_base
==
3225 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3226 /* Then go ahead and try to look up this single section in the cache */
3227 if (simple_overlay_update_1 (osect
))
3228 /* Found it! We're done. */
3231 /* Cached table no good: need to read the entire table anew.
3232 Or else we want all the sections, in which case it's actually
3233 more efficient to read the whole table in one block anyway. */
3235 if (! simple_read_overlay_table ())
3238 /* Now may as well update all sections, even if only one was requested. */
3239 ALL_OBJSECTIONS (objfile
, osect
)
3240 if (section_is_overlay (osect
->the_bfd_section
))
3243 bfd
*obfd
= osect
->objfile
->obfd
;
3244 asection
*bsect
= osect
->the_bfd_section
;
3246 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3247 for (i
= 0; i
< cache_novlys
; i
++)
3248 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3249 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3250 /* && cache_ovly_table[i][SIZE] == size */ )
3251 { /* obj_section matches i'th entry in ovly_table */
3252 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3253 break; /* finished with inner for loop: break out */
3260 _initialize_symfile (void)
3262 struct cmd_list_element
*c
;
3264 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3265 "Load symbol table from executable file FILE.\n\
3266 The `file' command can also load symbol tables, as well as setting the file\n\
3267 to execute.", &cmdlist
);
3268 set_cmd_completer (c
, filename_completer
);
3270 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3271 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3272 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3273 ADDR is the starting address of the file's text.\n\
3274 The optional arguments are section-name section-address pairs and\n\
3275 should be specified if the data and bss segments are not contiguous\n\
3276 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3278 set_cmd_completer (c
, filename_completer
);
3280 c
= add_cmd ("add-shared-symbol-files", class_files
,
3281 add_shared_symbol_files_command
,
3282 "Load the symbols from shared objects in the dynamic linker's link map.",
3284 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3287 c
= add_cmd ("load", class_files
, load_command
,
3288 "Dynamically load FILE into the running program, and record its symbols\n\
3289 for access from GDB.", &cmdlist
);
3290 set_cmd_completer (c
, filename_completer
);
3293 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3294 (char *) &symbol_reloading
,
3295 "Set dynamic symbol table reloading multiple times in one run.",
3299 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3300 "Commands for debugging overlays.", &overlaylist
,
3301 "overlay ", 0, &cmdlist
);
3303 add_com_alias ("ovly", "overlay", class_alias
, 1);
3304 add_com_alias ("ov", "overlay", class_alias
, 1);
3306 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3307 "Assert that an overlay section is mapped.", &overlaylist
);
3309 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3310 "Assert that an overlay section is unmapped.", &overlaylist
);
3312 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3313 "List mappings of overlay sections.", &overlaylist
);
3315 add_cmd ("manual", class_support
, overlay_manual_command
,
3316 "Enable overlay debugging.", &overlaylist
);
3317 add_cmd ("off", class_support
, overlay_off_command
,
3318 "Disable overlay debugging.", &overlaylist
);
3319 add_cmd ("auto", class_support
, overlay_auto_command
,
3320 "Enable automatic overlay debugging.", &overlaylist
);
3321 add_cmd ("load-target", class_support
, overlay_load_command
,
3322 "Read the overlay mapping state from the target.", &overlaylist
);
3324 /* Filename extension to source language lookup table: */
3325 init_filename_language_table ();
3326 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3328 "Set mapping between filename extension and source language.\n\
3329 Usage: set extension-language .foo bar",
3331 set_cmd_cfunc (c
, set_ext_lang_command
);
3333 add_info ("extensions", info_ext_lang_command
,
3334 "All filename extensions associated with a source language.");
3337 (add_set_cmd ("download-write-size", class_obscure
,
3338 var_integer
, (char *) &download_write_size
,
3339 "Set the write size used when downloading a program.\n"
3340 "Only used when downloading a program onto a remote\n"
3341 "target. Specify zero, or a negative value, to disable\n"
3342 "blocked writes. The actual size of each transfer is also\n"
3343 "limited by the size of the target packet and the memory\n"