1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001 Free Software Foundation, Inc.
4 Contributed by Cygnus Support, using pieces from other GDB modules.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
33 #include "breakpoint.h"
35 #include "complaints.h"
37 #include "inferior.h" /* for write_pc */
38 #include "gdb-stabs.h"
41 #include <sys/types.h>
43 #include "gdb_string.h"
54 /* Some HP-UX related globals to clear when a new "main"
55 symbol file is loaded. HP-specific. */
57 extern int hp_som_som_object_present
;
58 extern int hp_cxx_exception_support_initialized
;
59 #define RESET_HP_UX_GLOBALS() do {\
60 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
61 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
65 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
66 void (*show_load_progress
) (const char *section
,
67 unsigned long section_sent
,
68 unsigned long section_size
,
69 unsigned long total_sent
,
70 unsigned long total_size
);
71 void (*pre_add_symbol_hook
) (char *);
72 void (*post_add_symbol_hook
) (void);
73 void (*target_new_objfile_hook
) (struct objfile
*);
75 static void clear_symtab_users_cleanup (void *ignore
);
77 /* Global variables owned by this file */
78 int readnow_symbol_files
; /* Read full symbols immediately */
80 struct complaint oldsyms_complaint
=
82 "Replacing old symbols for `%s'", 0, 0
85 struct complaint empty_symtab_complaint
=
87 "Empty symbol table found for `%s'", 0, 0
90 struct complaint unknown_option_complaint
=
92 "Unknown option `%s' ignored", 0, 0
95 /* External variables and functions referenced. */
97 extern int info_verbose
;
99 extern void report_transfer_performance (unsigned long, time_t, time_t);
101 /* Functions this file defines */
104 static int simple_read_overlay_region_table (void);
105 static void simple_free_overlay_region_table (void);
108 static void set_initial_language (void);
110 static void load_command (char *, int);
112 static void add_symbol_file_command (char *, int);
114 static void add_shared_symbol_files_command (char *, int);
116 static void cashier_psymtab (struct partial_symtab
*);
118 static int compare_psymbols (const void *, const void *);
120 static int compare_symbols (const void *, const void *);
122 bfd
*symfile_bfd_open (char *);
124 static void find_sym_fns (struct objfile
*);
126 static void decrement_reading_symtab (void *);
128 static void overlay_invalidate_all (void);
130 static int overlay_is_mapped (struct obj_section
*);
132 void list_overlays_command (char *, int);
134 void map_overlay_command (char *, int);
136 void unmap_overlay_command (char *, int);
138 static void overlay_auto_command (char *, int);
140 static void overlay_manual_command (char *, int);
142 static void overlay_off_command (char *, int);
144 static void overlay_load_command (char *, int);
146 static void overlay_command (char *, int);
148 static void simple_free_overlay_table (void);
150 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
152 static int simple_read_overlay_table (void);
154 static int simple_overlay_update_1 (struct obj_section
*);
156 static void add_filename_language (char *ext
, enum language lang
);
158 static void set_ext_lang_command (char *args
, int from_tty
);
160 static void info_ext_lang_command (char *args
, int from_tty
);
162 static void init_filename_language_table (void);
164 void _initialize_symfile (void);
166 /* List of all available sym_fns. On gdb startup, each object file reader
167 calls add_symtab_fns() to register information on each format it is
170 static struct sym_fns
*symtab_fns
= NULL
;
172 /* Flag for whether user will be reloading symbols multiple times.
173 Defaults to ON for VxWorks, otherwise OFF. */
175 #ifdef SYMBOL_RELOADING_DEFAULT
176 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
178 int symbol_reloading
= 0;
181 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
182 this variable is interpreted as a threshhold. If adding a new
183 library's symbol table to those already known to the debugger would
184 exceed this threshhold, then the shlib's symbols are not added.
186 If non-zero on other platforms, shared library symbols will be added
187 automatically when the inferior is created, new libraries are loaded,
188 or when attaching to the inferior. This is almost always what users
189 will want to have happen; but for very large programs, the startup
190 time will be excessive, and so if this is a problem, the user can
191 clear this flag and then add the shared library symbols as needed.
192 Note that there is a potential for confusion, since if the shared
193 library symbols are not loaded, commands like "info fun" will *not*
194 report all the functions that are actually present.
196 Note that HP-UX interprets this variable to mean, "threshhold size
197 in megabytes, where zero means never add". Other platforms interpret
198 this variable to mean, "always add if non-zero, never add if zero."
201 int auto_solib_add
= 1;
204 /* Since this function is called from within qsort, in an ANSI environment
205 it must conform to the prototype for qsort, which specifies that the
206 comparison function takes two "void *" pointers. */
209 compare_symbols (const PTR s1p
, const PTR s2p
)
211 register struct symbol
**s1
, **s2
;
213 s1
= (struct symbol
**) s1p
;
214 s2
= (struct symbol
**) s2p
;
215 return (strcmp (SYMBOL_SOURCE_NAME (*s1
), SYMBOL_SOURCE_NAME (*s2
)));
222 compare_psymbols -- compare two partial symbols by name
226 Given pointers to pointers to two partial symbol table entries,
227 compare them by name and return -N, 0, or +N (ala strcmp).
228 Typically used by sorting routines like qsort().
232 Does direct compare of first two characters before punting
233 and passing to strcmp for longer compares. Note that the
234 original version had a bug whereby two null strings or two
235 identically named one character strings would return the
236 comparison of memory following the null byte.
241 compare_psymbols (const PTR s1p
, const PTR s2p
)
243 register struct partial_symbol
**s1
, **s2
;
244 register char *st1
, *st2
;
246 s1
= (struct partial_symbol
**) s1p
;
247 s2
= (struct partial_symbol
**) s2p
;
248 st1
= SYMBOL_SOURCE_NAME (*s1
);
249 st2
= SYMBOL_SOURCE_NAME (*s2
);
252 if ((st1
[0] - st2
[0]) || !st1
[0])
254 return (st1
[0] - st2
[0]);
256 else if ((st1
[1] - st2
[1]) || !st1
[1])
258 return (st1
[1] - st2
[1]);
262 return (strcmp (st1
, st2
));
267 sort_pst_symbols (struct partial_symtab
*pst
)
269 /* Sort the global list; don't sort the static list */
271 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
272 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
276 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
279 sort_block_syms (register struct block
*b
)
281 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
282 sizeof (struct symbol
*), compare_symbols
);
285 /* Call sort_symtab_syms to sort alphabetically
286 the symbols of each block of one symtab. */
289 sort_symtab_syms (register struct symtab
*s
)
291 register struct blockvector
*bv
;
294 register struct block
*b
;
298 bv
= BLOCKVECTOR (s
);
299 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
300 for (i
= 0; i
< nbl
; i
++)
302 b
= BLOCKVECTOR_BLOCK (bv
, i
);
303 if (BLOCK_SHOULD_SORT (b
))
308 /* Make a null terminated copy of the string at PTR with SIZE characters in
309 the obstack pointed to by OBSTACKP . Returns the address of the copy.
310 Note that the string at PTR does not have to be null terminated, I.E. it
311 may be part of a larger string and we are only saving a substring. */
314 obsavestring (char *ptr
, int size
, struct obstack
*obstackp
)
316 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
317 /* Open-coded memcpy--saves function call time. These strings are usually
318 short. FIXME: Is this really still true with a compiler that can
321 register char *p1
= ptr
;
322 register char *p2
= p
;
323 char *end
= ptr
+ size
;
331 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
332 in the obstack pointed to by OBSTACKP. */
335 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
338 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
339 register char *val
= (char *) obstack_alloc (obstackp
, len
);
346 /* True if we are nested inside psymtab_to_symtab. */
348 int currently_reading_symtab
= 0;
351 decrement_reading_symtab (void *dummy
)
353 currently_reading_symtab
--;
356 /* Get the symbol table that corresponds to a partial_symtab.
357 This is fast after the first time you do it. In fact, there
358 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
362 psymtab_to_symtab (register struct partial_symtab
*pst
)
364 /* If it's been looked up before, return it. */
368 /* If it has not yet been read in, read it. */
371 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
372 currently_reading_symtab
++;
373 (*pst
->read_symtab
) (pst
);
374 do_cleanups (back_to
);
380 /* Initialize entry point information for this objfile. */
383 init_entry_point_info (struct objfile
*objfile
)
385 /* Save startup file's range of PC addresses to help blockframe.c
386 decide where the bottom of the stack is. */
388 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
390 /* Executable file -- record its entry point so we'll recognize
391 the startup file because it contains the entry point. */
392 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
396 /* Examination of non-executable.o files. Short-circuit this stuff. */
397 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
399 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
400 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
401 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
402 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
403 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
404 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
407 /* Get current entry point address. */
410 entry_point_address (void)
412 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
415 /* Remember the lowest-addressed loadable section we've seen.
416 This function is called via bfd_map_over_sections.
418 In case of equal vmas, the section with the largest size becomes the
419 lowest-addressed loadable section.
421 If the vmas and sizes are equal, the last section is considered the
422 lowest-addressed loadable section. */
425 find_lowest_section (bfd
*abfd
, asection
*sect
, PTR obj
)
427 asection
**lowest
= (asection
**) obj
;
429 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
432 *lowest
= sect
; /* First loadable section */
433 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
434 *lowest
= sect
; /* A lower loadable section */
435 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
436 && (bfd_section_size (abfd
, (*lowest
))
437 <= bfd_section_size (abfd
, sect
)))
442 /* Build (allocate and populate) a section_addr_info struct from
443 an existing section table. */
445 extern struct section_addr_info
*
446 build_section_addr_info_from_section_table (const struct section_table
*start
,
447 const struct section_table
*end
)
449 struct section_addr_info
*sap
;
450 const struct section_table
*stp
;
453 sap
= xmalloc (sizeof (struct section_addr_info
));
454 memset (sap
, 0, sizeof (struct section_addr_info
));
456 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
458 if (stp
->the_bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
)
459 && oidx
< MAX_SECTIONS
)
461 sap
->other
[oidx
].addr
= stp
->addr
;
462 sap
->other
[oidx
].name
= xstrdup (stp
->the_bfd_section
->name
);
463 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
472 /* Free all memory allocated by build_section_addr_info_from_section_table. */
475 free_section_addr_info (struct section_addr_info
*sap
)
479 for (idx
= 0; idx
< MAX_SECTIONS
; idx
++)
480 if (sap
->other
[idx
].name
)
481 xfree (sap
->other
[idx
].name
);
486 /* Parse the user's idea of an offset for dynamic linking, into our idea
487 of how to represent it for fast symbol reading. This is the default
488 version of the sym_fns.sym_offsets function for symbol readers that
489 don't need to do anything special. It allocates a section_offsets table
490 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
493 default_symfile_offsets (struct objfile
*objfile
,
494 struct section_addr_info
*addrs
)
497 asection
*sect
= NULL
;
499 objfile
->num_sections
= SECT_OFF_MAX
;
500 objfile
->section_offsets
= (struct section_offsets
*)
501 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
502 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
504 /* Now calculate offsets for section that were specified by the
506 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
508 struct other_sections
*osp
;
510 osp
= &addrs
->other
[i
] ;
514 /* Record all sections in offsets */
515 /* The section_offsets in the objfile are here filled in using
517 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
520 /* Remember the bfd indexes for the .text, .data, .bss and
523 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
525 objfile
->sect_index_text
= sect
->index
;
527 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
529 objfile
->sect_index_data
= sect
->index
;
531 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
533 objfile
->sect_index_bss
= sect
->index
;
535 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
537 objfile
->sect_index_rodata
= sect
->index
;
541 /* Process a symbol file, as either the main file or as a dynamically
544 OBJFILE is where the symbols are to be read from.
546 ADDR is the address where the text segment was loaded, unless the
547 objfile is the main symbol file, in which case it is zero.
549 MAINLINE is nonzero if this is the main symbol file, or zero if
550 it's an extra symbol file such as dynamically loaded code.
552 VERBO is nonzero if the caller has printed a verbose message about
553 the symbol reading (and complaints can be more terse about it). */
556 syms_from_objfile (struct objfile
*objfile
, struct section_addr_info
*addrs
,
557 int mainline
, int verbo
)
559 asection
*lower_sect
;
561 CORE_ADDR lower_offset
;
562 struct section_addr_info local_addr
;
563 struct cleanup
*old_chain
;
566 /* If ADDRS is NULL, initialize the local section_addr_info struct and
567 point ADDRS to it. We now establish the convention that an addr of
568 zero means no load address was specified. */
572 memset (&local_addr
, 0, sizeof (local_addr
));
576 init_entry_point_info (objfile
);
577 find_sym_fns (objfile
);
579 /* Make sure that partially constructed symbol tables will be cleaned up
580 if an error occurs during symbol reading. */
581 old_chain
= make_cleanup_free_objfile (objfile
);
585 /* We will modify the main symbol table, make sure that all its users
586 will be cleaned up if an error occurs during symbol reading. */
587 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
589 /* Since no error yet, throw away the old symbol table. */
591 if (symfile_objfile
!= NULL
)
593 free_objfile (symfile_objfile
);
594 symfile_objfile
= NULL
;
597 /* Currently we keep symbols from the add-symbol-file command.
598 If the user wants to get rid of them, they should do "symbol-file"
599 without arguments first. Not sure this is the best behavior
602 (*objfile
->sf
->sym_new_init
) (objfile
);
605 /* Convert addr into an offset rather than an absolute address.
606 We find the lowest address of a loaded segment in the objfile,
607 and assume that <addr> is where that got loaded.
609 We no longer warn if the lowest section is not a text segment (as
610 happens for the PA64 port. */
613 /* Find lowest loadable section to be used as starting point for
614 continguous sections. FIXME!! won't work without call to find
615 .text first, but this assumes text is lowest section. */
616 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
617 if (lower_sect
== NULL
)
618 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
620 if (lower_sect
== NULL
)
621 warning ("no loadable sections found in added symbol-file %s",
624 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
625 warning ("Lowest section in %s is %s at %s",
627 bfd_section_name (objfile
->obfd
, lower_sect
),
628 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
629 if (lower_sect
!= NULL
)
630 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
634 /* Calculate offsets for the loadable sections.
635 FIXME! Sections must be in order of increasing loadable section
636 so that contiguous sections can use the lower-offset!!!
638 Adjust offsets if the segments are not contiguous.
639 If the section is contiguous, its offset should be set to
640 the offset of the highest loadable section lower than it
641 (the loadable section directly below it in memory).
642 this_offset = lower_offset = lower_addr - lower_orig_addr */
644 /* Calculate offsets for sections. */
645 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
647 if (addrs
->other
[i
].addr
!= 0)
649 sect
= bfd_get_section_by_name (objfile
->obfd
, addrs
->other
[i
].name
);
652 addrs
->other
[i
].addr
-= bfd_section_vma (objfile
->obfd
, sect
);
653 lower_offset
= addrs
->other
[i
].addr
;
654 /* This is the index used by BFD. */
655 addrs
->other
[i
].sectindex
= sect
->index
;
659 warning ("section %s not found in %s", addrs
->other
[i
].name
,
661 addrs
->other
[i
].addr
= 0;
665 addrs
->other
[i
].addr
= lower_offset
;
669 /* Initialize symbol reading routines for this objfile, allow complaints to
670 appear for this new file, and record how verbose to be, then do the
671 initial symbol reading for this file. */
673 (*objfile
->sf
->sym_init
) (objfile
);
674 clear_complaints (1, verbo
);
676 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
678 #ifndef IBM6000_TARGET
679 /* This is a SVR4/SunOS specific hack, I think. In any event, it
680 screws RS/6000. sym_offsets should be doing this sort of thing,
681 because it knows the mapping between bfd sections and
683 /* This is a hack. As far as I can tell, section offsets are not
684 target dependent. They are all set to addr with a couple of
685 exceptions. The exceptions are sysvr4 shared libraries, whose
686 offsets are kept in solib structures anyway and rs6000 xcoff
687 which handles shared libraries in a completely unique way.
689 Section offsets are built similarly, except that they are built
690 by adding addr in all cases because there is no clear mapping
691 from section_offsets into actual sections. Note that solib.c
692 has a different algorithm for finding section offsets.
694 These should probably all be collapsed into some target
695 independent form of shared library support. FIXME. */
699 struct obj_section
*s
;
701 /* Map section offsets in "addr" back to the object's
702 sections by comparing the section names with bfd's
703 section names. Then adjust the section address by
704 the offset. */ /* for gdb/13815 */
706 ALL_OBJFILE_OSECTIONS (objfile
, s
)
708 CORE_ADDR s_addr
= 0;
712 !s_addr
&& i
< MAX_SECTIONS
&& addrs
->other
[i
].name
;
714 if (strcmp (s
->the_bfd_section
->name
, addrs
->other
[i
].name
) == 0)
715 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
717 s
->addr
-= s
->offset
;
719 s
->endaddr
-= s
->offset
;
720 s
->endaddr
+= s_addr
;
724 #endif /* not IBM6000_TARGET */
726 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
728 if (!have_partial_symbols () && !have_full_symbols ())
731 printf_filtered ("(no debugging symbols found)...");
735 /* Don't allow char * to have a typename (else would get caddr_t).
736 Ditto void *. FIXME: Check whether this is now done by all the
737 symbol readers themselves (many of them now do), and if so remove
740 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
741 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
743 /* Mark the objfile has having had initial symbol read attempted. Note
744 that this does not mean we found any symbols... */
746 objfile
->flags
|= OBJF_SYMS
;
748 /* Discard cleanups as symbol reading was successful. */
750 discard_cleanups (old_chain
);
752 /* Call this after reading in a new symbol table to give target
753 dependent code a crack at the new symbols. For instance, this
754 could be used to update the values of target-specific symbols GDB
755 needs to keep track of (such as _sigtramp, or whatever). */
757 TARGET_SYMFILE_POSTREAD (objfile
);
760 /* Perform required actions after either reading in the initial
761 symbols for a new objfile, or mapping in the symbols from a reusable
765 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
768 /* If this is the main symbol file we have to clean up all users of the
769 old main symbol file. Otherwise it is sufficient to fixup all the
770 breakpoints that may have been redefined by this symbol file. */
773 /* OK, make it the "real" symbol file. */
774 symfile_objfile
= objfile
;
776 clear_symtab_users ();
780 breakpoint_re_set ();
783 /* We're done reading the symbol file; finish off complaints. */
784 clear_complaints (0, verbo
);
787 /* Process a symbol file, as either the main file or as a dynamically
790 NAME is the file name (which will be tilde-expanded and made
791 absolute herein) (but we don't free or modify NAME itself).
792 FROM_TTY says how verbose to be. MAINLINE specifies whether this
793 is the main symbol file, or whether it's an extra symbol file such
794 as dynamically loaded code. If !mainline, ADDR is the address
795 where the text segment was loaded.
797 Upon success, returns a pointer to the objfile that was added.
798 Upon failure, jumps back to command level (never returns). */
801 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
802 int mainline
, int flags
)
804 struct objfile
*objfile
;
805 struct partial_symtab
*psymtab
;
808 /* Open a bfd for the file, and give user a chance to burp if we'd be
809 interactively wiping out any existing symbols. */
811 abfd
= symfile_bfd_open (name
);
813 if ((have_full_symbols () || have_partial_symbols ())
816 && !query ("Load new symbol table from \"%s\"? ", name
))
817 error ("Not confirmed.");
819 objfile
= allocate_objfile (abfd
, flags
);
821 /* If the objfile uses a mapped symbol file, and we have a psymtab for
822 it, then skip reading any symbols at this time. */
824 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
826 /* We mapped in an existing symbol table file that already has had
827 initial symbol reading performed, so we can skip that part. Notify
828 the user that instead of reading the symbols, they have been mapped.
830 if (from_tty
|| info_verbose
)
832 printf_filtered ("Mapped symbols for %s...", name
);
834 gdb_flush (gdb_stdout
);
836 init_entry_point_info (objfile
);
837 find_sym_fns (objfile
);
841 /* We either created a new mapped symbol table, mapped an existing
842 symbol table file which has not had initial symbol reading
843 performed, or need to read an unmapped symbol table. */
844 if (from_tty
|| info_verbose
)
846 if (pre_add_symbol_hook
)
847 pre_add_symbol_hook (name
);
850 printf_filtered ("Reading symbols from %s...", name
);
852 gdb_flush (gdb_stdout
);
855 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
858 /* We now have at least a partial symbol table. Check to see if the
859 user requested that all symbols be read on initial access via either
860 the gdb startup command line or on a per symbol file basis. Expand
861 all partial symbol tables for this objfile if so. */
863 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
865 if (from_tty
|| info_verbose
)
867 printf_filtered ("expanding to full symbols...");
869 gdb_flush (gdb_stdout
);
872 for (psymtab
= objfile
->psymtabs
;
874 psymtab
= psymtab
->next
)
876 psymtab_to_symtab (psymtab
);
880 if (from_tty
|| info_verbose
)
882 if (post_add_symbol_hook
)
883 post_add_symbol_hook ();
886 printf_filtered ("done.\n");
887 gdb_flush (gdb_stdout
);
891 new_symfile_objfile (objfile
, mainline
, from_tty
);
893 if (target_new_objfile_hook
)
894 target_new_objfile_hook (objfile
);
899 /* Just call the above with default values.
900 Used when the file is supplied in the gdb command line. */
903 symbol_file_add_main (char *args
, int from_tty
)
905 symbol_file_add (args
, from_tty
, NULL
, 1, 0);
909 symbol_file_clear (int from_tty
)
911 if ((have_full_symbols () || have_partial_symbols ())
913 && !query ("Discard symbol table from `%s'? ",
914 symfile_objfile
->name
))
915 error ("Not confirmed.");
916 free_all_objfiles ();
918 /* solib descriptors may have handles to objfiles. Since their
919 storage has just been released, we'd better wipe the solib
922 #if defined(SOLIB_RESTART)
926 symfile_objfile
= NULL
;
928 printf_unfiltered ("No symbol file now.\n");
930 RESET_HP_UX_GLOBALS ();
934 /* This is the symbol-file command. Read the file, analyze its
935 symbols, and add a struct symtab to a symtab list. The syntax of
936 the command is rather bizarre--(1) buildargv implements various
937 quoting conventions which are undocumented and have little or
938 nothing in common with the way things are quoted (or not quoted)
939 elsewhere in GDB, (2) options are used, which are not generally
940 used in GDB (perhaps "set mapped on", "set readnow on" would be
941 better), (3) the order of options matters, which is contrary to GNU
942 conventions (because it is confusing and inconvenient). */
943 /* Note: ezannoni 2000-04-17. This function used to have support for
944 rombug (see remote-os9k.c). It consisted of a call to target_link()
945 (target.c) to get the address of the text segment from the target,
946 and pass that to symbol_file_add(). This is no longer supported. */
949 symbol_file_command (char *args
, int from_tty
)
953 struct cleanup
*cleanups
;
954 int flags
= OBJF_USERLOADED
;
960 symbol_file_clear (from_tty
);
964 if ((argv
= buildargv (args
)) == NULL
)
968 cleanups
= make_cleanup_freeargv (argv
);
969 while (*argv
!= NULL
)
971 if (STREQ (*argv
, "-mapped"))
972 flags
|= OBJF_MAPPED
;
974 if (STREQ (*argv
, "-readnow"))
975 flags
|= OBJF_READNOW
;
978 error ("unknown option `%s'", *argv
);
982 symbol_file_add (name
, from_tty
, NULL
, 1, flags
);
984 RESET_HP_UX_GLOBALS ();
986 /* Getting new symbols may change our opinion about
987 what is frameless. */
988 reinit_frame_cache ();
990 set_initial_language ();
997 error ("no symbol file name was specified");
999 TUIDO (((TuiOpaqueFuncPtr
) tuiDisplayMainFunction
));
1000 do_cleanups (cleanups
);
1004 /* Set the initial language.
1006 A better solution would be to record the language in the psymtab when reading
1007 partial symbols, and then use it (if known) to set the language. This would
1008 be a win for formats that encode the language in an easily discoverable place,
1009 such as DWARF. For stabs, we can jump through hoops looking for specially
1010 named symbols or try to intuit the language from the specific type of stabs
1011 we find, but we can't do that until later when we read in full symbols.
1015 set_initial_language (void)
1017 struct partial_symtab
*pst
;
1018 enum language lang
= language_unknown
;
1020 pst
= find_main_psymtab ();
1023 if (pst
->filename
!= NULL
)
1025 lang
= deduce_language_from_filename (pst
->filename
);
1027 if (lang
== language_unknown
)
1029 /* Make C the default language */
1032 set_language (lang
);
1033 expected_language
= current_language
; /* Don't warn the user */
1037 /* Open file specified by NAME and hand it off to BFD for preliminary
1038 analysis. Result is a newly initialized bfd *, which includes a newly
1039 malloc'd` copy of NAME (tilde-expanded and made absolute).
1040 In case of trouble, error() is called. */
1043 symfile_bfd_open (char *name
)
1047 char *absolute_name
;
1051 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1053 /* Look down path for it, allocate 2nd new malloc'd copy. */
1054 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1055 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1058 char *exename
= alloca (strlen (name
) + 5);
1059 strcat (strcpy (exename
, name
), ".exe");
1060 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1066 make_cleanup (xfree
, name
);
1067 perror_with_name (name
);
1069 xfree (name
); /* Free 1st new malloc'd copy */
1070 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1071 /* It'll be freed in free_objfile(). */
1073 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1077 make_cleanup (xfree
, name
);
1078 error ("\"%s\": can't open to read symbols: %s.", name
,
1079 bfd_errmsg (bfd_get_error ()));
1081 sym_bfd
->cacheable
= true;
1083 if (!bfd_check_format (sym_bfd
, bfd_object
))
1085 /* FIXME: should be checking for errors from bfd_close (for one thing,
1086 on error it does not free all the storage associated with the
1088 bfd_close (sym_bfd
); /* This also closes desc */
1089 make_cleanup (xfree
, name
);
1090 error ("\"%s\": can't read symbols: %s.", name
,
1091 bfd_errmsg (bfd_get_error ()));
1096 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1097 startup by the _initialize routine in each object file format reader,
1098 to register information about each format the the reader is prepared
1102 add_symtab_fns (struct sym_fns
*sf
)
1104 sf
->next
= symtab_fns
;
1109 /* Initialize to read symbols from the symbol file sym_bfd. It either
1110 returns or calls error(). The result is an initialized struct sym_fns
1111 in the objfile structure, that contains cached information about the
1115 find_sym_fns (struct objfile
*objfile
)
1118 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1119 char *our_target
= bfd_get_target (objfile
->obfd
);
1121 /* Special kludge for apollo. See dstread.c. */
1122 if (STREQN (our_target
, "apollo", 6))
1123 our_flavour
= (enum bfd_flavour
) -2;
1125 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1127 if (our_flavour
== sf
->sym_flavour
)
1133 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1134 bfd_get_target (objfile
->obfd
));
1137 /* This function runs the load command of our current target. */
1140 load_command (char *arg
, int from_tty
)
1143 arg
= get_exec_file (1);
1144 target_load (arg
, from_tty
);
1147 /* This version of "load" should be usable for any target. Currently
1148 it is just used for remote targets, not inftarg.c or core files,
1149 on the theory that only in that case is it useful.
1151 Avoiding xmodem and the like seems like a win (a) because we don't have
1152 to worry about finding it, and (b) On VMS, fork() is very slow and so
1153 we don't want to run a subprocess. On the other hand, I'm not sure how
1154 performance compares. */
1156 static int download_write_size
= 512;
1157 static int validate_download
= 0;
1160 generic_load (char *args
, int from_tty
)
1164 time_t start_time
, end_time
; /* Start and end times of download */
1165 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1166 unsigned long write_count
= 0; /* Number of writes needed. */
1167 unsigned long load_offset
; /* offset to add to vma for each section */
1169 struct cleanup
*old_cleanups
;
1171 CORE_ADDR total_size
= 0;
1172 CORE_ADDR total_sent
= 0;
1174 /* Parse the input argument - the user can specify a load offset as
1175 a second argument. */
1176 filename
= xmalloc (strlen (args
) + 1);
1177 old_cleanups
= make_cleanup (xfree
, filename
);
1178 strcpy (filename
, args
);
1179 offptr
= strchr (filename
, ' ');
1183 load_offset
= strtoul (offptr
, &endptr
, 0);
1184 if (offptr
== endptr
)
1185 error ("Invalid download offset:%s\n", offptr
);
1191 /* Open the file for loading. */
1192 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1193 if (loadfile_bfd
== NULL
)
1195 perror_with_name (filename
);
1199 /* FIXME: should be checking for errors from bfd_close (for one thing,
1200 on error it does not free all the storage associated with the
1202 make_cleanup_bfd_close (loadfile_bfd
);
1204 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1206 error ("\"%s\" is not an object file: %s", filename
,
1207 bfd_errmsg (bfd_get_error ()));
1210 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1211 if (s
->flags
& SEC_LOAD
)
1212 total_size
+= bfd_get_section_size_before_reloc (s
);
1214 start_time
= time (NULL
);
1216 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1218 if (s
->flags
& SEC_LOAD
)
1220 CORE_ADDR size
= bfd_get_section_size_before_reloc (s
);
1224 struct cleanup
*old_chain
;
1225 CORE_ADDR lma
= s
->lma
+ load_offset
;
1226 CORE_ADDR block_size
;
1228 const char *sect_name
= bfd_get_section_name (loadfile_bfd
, s
);
1231 if (download_write_size
> 0 && size
> download_write_size
)
1232 block_size
= download_write_size
;
1236 buffer
= xmalloc (size
);
1237 old_chain
= make_cleanup (xfree
, buffer
);
1239 /* Is this really necessary? I guess it gives the user something
1240 to look at during a long download. */
1242 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1243 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1245 fprintf_unfiltered (gdb_stdout
,
1246 "Loading section %s, size 0x%s lma 0x%s\n",
1247 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1250 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1256 CORE_ADDR this_transfer
= size
- sent
;
1257 if (this_transfer
>= block_size
)
1258 this_transfer
= block_size
;
1259 len
= target_write_memory_partial (lma
, buffer
,
1260 this_transfer
, &err
);
1263 if (validate_download
)
1265 /* Broken memories and broken monitors manifest
1266 themselves here when bring new computers to
1267 life. This doubles already slow downloads. */
1268 /* NOTE: cagney/1999-10-18: A more efficient
1269 implementation might add a verify_memory()
1270 method to the target vector and then use
1271 that. remote.c could implement that method
1272 using the ``qCRC'' packet. */
1273 char *check
= xmalloc (len
);
1274 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1275 if (target_read_memory (lma
, check
, len
) != 0)
1276 error ("Download verify read failed at 0x%s",
1278 if (memcmp (buffer
, check
, len
) != 0)
1279 error ("Download verify compare failed at 0x%s",
1281 do_cleanups (verify_cleanups
);
1290 || (ui_load_progress_hook
!= NULL
1291 && ui_load_progress_hook (sect_name
, sent
)))
1292 error ("Canceled the download");
1294 if (show_load_progress
!= NULL
)
1295 show_load_progress (sect_name
, sent
, size
, total_sent
, total_size
);
1297 while (sent
< size
);
1300 error ("Memory access error while loading section %s.", sect_name
);
1302 do_cleanups (old_chain
);
1307 end_time
= time (NULL
);
1310 entry
= bfd_get_start_address (loadfile_bfd
);
1312 ui_out_text (uiout
, "Start address ");
1313 ui_out_field_fmt (uiout
, "address", "0x%s" , paddr_nz (entry
));
1314 ui_out_text (uiout
, ", load size ");
1315 ui_out_field_fmt (uiout
, "load-size", "%ld" , data_count
);
1316 ui_out_text (uiout
, "\n");
1319 fprintf_unfiltered (gdb_stdout
,
1320 "Start address 0x%s , load size %ld\n",
1321 paddr_nz (entry
), data_count
);
1323 /* We were doing this in remote-mips.c, I suspect it is right
1324 for other targets too. */
1328 /* FIXME: are we supposed to call symbol_file_add or not? According to
1329 a comment from remote-mips.c (where a call to symbol_file_add was
1330 commented out), making the call confuses GDB if more than one file is
1331 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1334 print_transfer_performance (gdb_stdout
, data_count
, write_count
,
1335 end_time
- start_time
);
1337 do_cleanups (old_cleanups
);
1340 /* Report how fast the transfer went. */
1342 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1343 replaced by print_transfer_performance (with a very different
1344 function signature). */
1347 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1350 print_transfer_performance (gdb_stdout
, data_count
, end_time
- start_time
, 0);
1354 print_transfer_performance (struct ui_file
*stream
,
1355 unsigned long data_count
,
1356 unsigned long write_count
,
1357 unsigned long time_count
)
1360 ui_out_text (uiout
, "Transfer rate: ");
1363 ui_out_field_fmt (uiout
, "transfer-rate", "%ld",
1364 (data_count
* 8) / time_count
);
1365 ui_out_text (uiout
, " bits/sec");
1369 ui_out_field_fmt (uiout
, "transferred-bits", "%ld", (data_count
* 8));
1370 ui_out_text (uiout
, " bits in <1 sec");
1372 if (write_count
> 0)
1374 ui_out_text (uiout
, ", ");
1375 ui_out_field_fmt (uiout
, "write-rate", "%ld", data_count
/ write_count
);
1376 ui_out_text (uiout
, " bytes/write");
1378 ui_out_text (uiout
, ".\n");
1380 fprintf_unfiltered (stream
, "Transfer rate: ");
1382 fprintf_unfiltered (stream
, "%ld bits/sec", (data_count
* 8) / time_count
);
1384 fprintf_unfiltered (stream
, "%ld bits in <1 sec", (data_count
* 8));
1385 if (write_count
> 0)
1386 fprintf_unfiltered (stream
, ", %ld bytes/write", data_count
/ write_count
);
1387 fprintf_unfiltered (stream
, ".\n");
1391 /* This function allows the addition of incrementally linked object files.
1392 It does not modify any state in the target, only in the debugger. */
1393 /* Note: ezannoni 2000-04-13 This function/command used to have a
1394 special case syntax for the rombug target (Rombug is the boot
1395 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1396 rombug case, the user doesn't need to supply a text address,
1397 instead a call to target_link() (in target.c) would supply the
1398 value to use. We are now discontinuing this type of ad hoc syntax. */
1402 add_symbol_file_command (char *args
, int from_tty
)
1404 char *filename
= NULL
;
1405 int flags
= OBJF_USERLOADED
;
1407 int expecting_option
= 0;
1408 int section_index
= 0;
1412 int expecting_sec_name
= 0;
1413 int expecting_sec_addr
= 0;
1419 } sect_opts
[SECT_OFF_MAX
];
1421 struct section_addr_info section_addrs
;
1422 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1427 error ("add-symbol-file takes a file name and an address");
1429 /* Make a copy of the string that we can safely write into. */
1430 args
= xstrdup (args
);
1432 /* Ensure section_addrs is initialized */
1433 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1435 while (*args
!= '\000')
1437 /* Any leading spaces? */
1438 while (isspace (*args
))
1441 /* Point arg to the beginning of the argument. */
1444 /* Move args pointer over the argument. */
1445 while ((*args
!= '\000') && !isspace (*args
))
1448 /* If there are more arguments, terminate arg and
1450 if (*args
!= '\000')
1453 /* Now process the argument. */
1456 /* The first argument is the file name. */
1457 filename
= tilde_expand (arg
);
1458 make_cleanup (xfree
, filename
);
1463 /* The second argument is always the text address at which
1464 to load the program. */
1465 sect_opts
[section_index
].name
= ".text";
1466 sect_opts
[section_index
].value
= arg
;
1471 /* It's an option (starting with '-') or it's an argument
1476 if (strcmp (arg
, "-mapped") == 0)
1477 flags
|= OBJF_MAPPED
;
1479 if (strcmp (arg
, "-readnow") == 0)
1480 flags
|= OBJF_READNOW
;
1482 if (strcmp (arg
, "-s") == 0)
1484 if (section_index
>= SECT_OFF_MAX
)
1485 error ("Too many sections specified.");
1486 expecting_sec_name
= 1;
1487 expecting_sec_addr
= 1;
1492 if (expecting_sec_name
)
1494 sect_opts
[section_index
].name
= arg
;
1495 expecting_sec_name
= 0;
1498 if (expecting_sec_addr
)
1500 sect_opts
[section_index
].value
= arg
;
1501 expecting_sec_addr
= 0;
1505 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1511 /* Print the prompt for the query below. And save the arguments into
1512 a sect_addr_info structure to be passed around to other
1513 functions. We have to split this up into separate print
1514 statements because local_hex_string returns a local static
1517 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1518 for (i
= 0; i
< section_index
; i
++)
1521 char *val
= sect_opts
[i
].value
;
1522 char *sec
= sect_opts
[i
].name
;
1524 val
= sect_opts
[i
].value
;
1525 if (val
[0] == '0' && val
[1] == 'x')
1526 addr
= strtoul (val
+2, NULL
, 16);
1528 addr
= strtoul (val
, NULL
, 10);
1530 /* Here we store the section offsets in the order they were
1531 entered on the command line. */
1532 section_addrs
.other
[sec_num
].name
= sec
;
1533 section_addrs
.other
[sec_num
].addr
= addr
;
1534 printf_filtered ("\t%s_addr = %s\n",
1536 local_hex_string ((unsigned long)addr
));
1539 /* The object's sections are initialized when a
1540 call is made to build_objfile_section_table (objfile).
1541 This happens in reread_symbols.
1542 At this point, we don't know what file type this is,
1543 so we can't determine what section names are valid. */
1546 if (from_tty
&& (!query ("%s", "")))
1547 error ("Not confirmed.");
1549 symbol_file_add (filename
, from_tty
, §ion_addrs
, 0, flags
);
1551 /* Getting new symbols may change our opinion about what is
1553 reinit_frame_cache ();
1554 do_cleanups (my_cleanups
);
1558 add_shared_symbol_files_command (char *args
, int from_tty
)
1560 #ifdef ADD_SHARED_SYMBOL_FILES
1561 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1563 error ("This command is not available in this configuration of GDB.");
1567 /* Re-read symbols if a symbol-file has changed. */
1569 reread_symbols (void)
1571 struct objfile
*objfile
;
1574 struct stat new_statbuf
;
1577 /* With the addition of shared libraries, this should be modified,
1578 the load time should be saved in the partial symbol tables, since
1579 different tables may come from different source files. FIXME.
1580 This routine should then walk down each partial symbol table
1581 and see if the symbol table that it originates from has been changed */
1583 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1587 #ifdef IBM6000_TARGET
1588 /* If this object is from a shared library, then you should
1589 stat on the library name, not member name. */
1591 if (objfile
->obfd
->my_archive
)
1592 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1595 res
= stat (objfile
->name
, &new_statbuf
);
1598 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1599 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1603 new_modtime
= new_statbuf
.st_mtime
;
1604 if (new_modtime
!= objfile
->mtime
)
1606 struct cleanup
*old_cleanups
;
1607 struct section_offsets
*offsets
;
1609 char *obfd_filename
;
1611 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1614 /* There are various functions like symbol_file_add,
1615 symfile_bfd_open, syms_from_objfile, etc., which might
1616 appear to do what we want. But they have various other
1617 effects which we *don't* want. So we just do stuff
1618 ourselves. We don't worry about mapped files (for one thing,
1619 any mapped file will be out of date). */
1621 /* If we get an error, blow away this objfile (not sure if
1622 that is the correct response for things like shared
1624 old_cleanups
= make_cleanup_free_objfile (objfile
);
1625 /* We need to do this whenever any symbols go away. */
1626 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1628 /* Clean up any state BFD has sitting around. We don't need
1629 to close the descriptor but BFD lacks a way of closing the
1630 BFD without closing the descriptor. */
1631 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1632 if (!bfd_close (objfile
->obfd
))
1633 error ("Can't close BFD for %s: %s", objfile
->name
,
1634 bfd_errmsg (bfd_get_error ()));
1635 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1636 if (objfile
->obfd
== NULL
)
1637 error ("Can't open %s to read symbols.", objfile
->name
);
1638 /* bfd_openr sets cacheable to true, which is what we want. */
1639 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1640 error ("Can't read symbols from %s: %s.", objfile
->name
,
1641 bfd_errmsg (bfd_get_error ()));
1643 /* Save the offsets, we will nuke them with the rest of the
1645 num_offsets
= objfile
->num_sections
;
1646 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1647 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1649 /* Nuke all the state that we will re-read. Much of the following
1650 code which sets things to NULL really is necessary to tell
1651 other parts of GDB that there is nothing currently there. */
1653 /* FIXME: Do we have to free a whole linked list, or is this
1655 if (objfile
->global_psymbols
.list
)
1656 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1657 memset (&objfile
->global_psymbols
, 0,
1658 sizeof (objfile
->global_psymbols
));
1659 if (objfile
->static_psymbols
.list
)
1660 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1661 memset (&objfile
->static_psymbols
, 0,
1662 sizeof (objfile
->static_psymbols
));
1664 /* Free the obstacks for non-reusable objfiles */
1665 free_bcache (&objfile
->psymbol_cache
);
1666 obstack_free (&objfile
->psymbol_obstack
, 0);
1667 obstack_free (&objfile
->symbol_obstack
, 0);
1668 obstack_free (&objfile
->type_obstack
, 0);
1669 objfile
->sections
= NULL
;
1670 objfile
->symtabs
= NULL
;
1671 objfile
->psymtabs
= NULL
;
1672 objfile
->free_psymtabs
= NULL
;
1673 objfile
->msymbols
= NULL
;
1674 objfile
->minimal_symbol_count
= 0;
1675 memset (&objfile
->msymbol_hash
, 0,
1676 sizeof (objfile
->msymbol_hash
));
1677 memset (&objfile
->msymbol_demangled_hash
, 0,
1678 sizeof (objfile
->msymbol_demangled_hash
));
1679 objfile
->fundamental_types
= NULL
;
1680 if (objfile
->sf
!= NULL
)
1682 (*objfile
->sf
->sym_finish
) (objfile
);
1685 /* We never make this a mapped file. */
1687 /* obstack_specify_allocation also initializes the obstack so
1689 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1691 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1693 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1695 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1697 if (build_objfile_section_table (objfile
))
1699 error ("Can't find the file sections in `%s': %s",
1700 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1703 /* We use the same section offsets as from last time. I'm not
1704 sure whether that is always correct for shared libraries. */
1705 objfile
->section_offsets
= (struct section_offsets
*)
1706 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1707 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1708 objfile
->num_sections
= num_offsets
;
1710 /* What the hell is sym_new_init for, anyway? The concept of
1711 distinguishing between the main file and additional files
1712 in this way seems rather dubious. */
1713 if (objfile
== symfile_objfile
)
1715 (*objfile
->sf
->sym_new_init
) (objfile
);
1717 RESET_HP_UX_GLOBALS ();
1721 (*objfile
->sf
->sym_init
) (objfile
);
1722 clear_complaints (1, 1);
1723 /* The "mainline" parameter is a hideous hack; I think leaving it
1724 zero is OK since dbxread.c also does what it needs to do if
1725 objfile->global_psymbols.size is 0. */
1726 (*objfile
->sf
->sym_read
) (objfile
, 0);
1727 if (!have_partial_symbols () && !have_full_symbols ())
1730 printf_filtered ("(no debugging symbols found)\n");
1733 objfile
->flags
|= OBJF_SYMS
;
1735 /* We're done reading the symbol file; finish off complaints. */
1736 clear_complaints (0, 1);
1738 /* Getting new symbols may change our opinion about what is
1741 reinit_frame_cache ();
1743 /* Discard cleanups as symbol reading was successful. */
1744 discard_cleanups (old_cleanups
);
1746 /* If the mtime has changed between the time we set new_modtime
1747 and now, we *want* this to be out of date, so don't call stat
1749 objfile
->mtime
= new_modtime
;
1752 /* Call this after reading in a new symbol table to give target
1753 dependent code a crack at the new symbols. For instance, this
1754 could be used to update the values of target-specific symbols GDB
1755 needs to keep track of (such as _sigtramp, or whatever). */
1757 TARGET_SYMFILE_POSTREAD (objfile
);
1763 clear_symtab_users ();
1775 static filename_language
*filename_language_table
;
1776 static int fl_table_size
, fl_table_next
;
1779 add_filename_language (char *ext
, enum language lang
)
1781 if (fl_table_next
>= fl_table_size
)
1783 fl_table_size
+= 10;
1784 filename_language_table
= xrealloc (filename_language_table
,
1788 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
1789 filename_language_table
[fl_table_next
].lang
= lang
;
1793 static char *ext_args
;
1796 set_ext_lang_command (char *args
, int from_tty
)
1799 char *cp
= ext_args
;
1802 /* First arg is filename extension, starting with '.' */
1804 error ("'%s': Filename extension must begin with '.'", ext_args
);
1806 /* Find end of first arg. */
1807 while (*cp
&& !isspace (*cp
))
1811 error ("'%s': two arguments required -- filename extension and language",
1814 /* Null-terminate first arg */
1817 /* Find beginning of second arg, which should be a source language. */
1818 while (*cp
&& isspace (*cp
))
1822 error ("'%s': two arguments required -- filename extension and language",
1825 /* Lookup the language from among those we know. */
1826 lang
= language_enum (cp
);
1828 /* Now lookup the filename extension: do we already know it? */
1829 for (i
= 0; i
< fl_table_next
; i
++)
1830 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1833 if (i
>= fl_table_next
)
1835 /* new file extension */
1836 add_filename_language (ext_args
, lang
);
1840 /* redefining a previously known filename extension */
1843 /* query ("Really make files of type %s '%s'?", */
1844 /* ext_args, language_str (lang)); */
1846 xfree (filename_language_table
[i
].ext
);
1847 filename_language_table
[i
].ext
= xstrdup (ext_args
);
1848 filename_language_table
[i
].lang
= lang
;
1853 info_ext_lang_command (char *args
, int from_tty
)
1857 printf_filtered ("Filename extensions and the languages they represent:");
1858 printf_filtered ("\n\n");
1859 for (i
= 0; i
< fl_table_next
; i
++)
1860 printf_filtered ("\t%s\t- %s\n",
1861 filename_language_table
[i
].ext
,
1862 language_str (filename_language_table
[i
].lang
));
1866 init_filename_language_table (void)
1868 if (fl_table_size
== 0) /* protect against repetition */
1872 filename_language_table
=
1873 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1874 add_filename_language (".c", language_c
);
1875 add_filename_language (".C", language_cplus
);
1876 add_filename_language (".cc", language_cplus
);
1877 add_filename_language (".cp", language_cplus
);
1878 add_filename_language (".cpp", language_cplus
);
1879 add_filename_language (".cxx", language_cplus
);
1880 add_filename_language (".c++", language_cplus
);
1881 add_filename_language (".java", language_java
);
1882 add_filename_language (".class", language_java
);
1883 add_filename_language (".ch", language_chill
);
1884 add_filename_language (".c186", language_chill
);
1885 add_filename_language (".c286", language_chill
);
1886 add_filename_language (".f", language_fortran
);
1887 add_filename_language (".F", language_fortran
);
1888 add_filename_language (".s", language_asm
);
1889 add_filename_language (".S", language_asm
);
1890 add_filename_language (".pas", language_pascal
);
1891 add_filename_language (".p", language_pascal
);
1892 add_filename_language (".pp", language_pascal
);
1897 deduce_language_from_filename (char *filename
)
1902 if (filename
!= NULL
)
1903 if ((cp
= strrchr (filename
, '.')) != NULL
)
1904 for (i
= 0; i
< fl_table_next
; i
++)
1905 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1906 return filename_language_table
[i
].lang
;
1908 return language_unknown
;
1913 Allocate and partly initialize a new symbol table. Return a pointer
1914 to it. error() if no space.
1916 Caller must set these fields:
1922 possibly free_named_symtabs (symtab->filename);
1926 allocate_symtab (char *filename
, struct objfile
*objfile
)
1928 register struct symtab
*symtab
;
1930 symtab
= (struct symtab
*)
1931 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
1932 memset (symtab
, 0, sizeof (*symtab
));
1933 symtab
->filename
= obsavestring (filename
, strlen (filename
),
1934 &objfile
->symbol_obstack
);
1935 symtab
->fullname
= NULL
;
1936 symtab
->language
= deduce_language_from_filename (filename
);
1937 symtab
->debugformat
= obsavestring ("unknown", 7,
1938 &objfile
->symbol_obstack
);
1940 /* Hook it to the objfile it comes from */
1942 symtab
->objfile
= objfile
;
1943 symtab
->next
= objfile
->symtabs
;
1944 objfile
->symtabs
= symtab
;
1946 /* FIXME: This should go away. It is only defined for the Z8000,
1947 and the Z8000 definition of this macro doesn't have anything to
1948 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1949 here for convenience. */
1950 #ifdef INIT_EXTRA_SYMTAB_INFO
1951 INIT_EXTRA_SYMTAB_INFO (symtab
);
1957 struct partial_symtab
*
1958 allocate_psymtab (char *filename
, struct objfile
*objfile
)
1960 struct partial_symtab
*psymtab
;
1962 if (objfile
->free_psymtabs
)
1964 psymtab
= objfile
->free_psymtabs
;
1965 objfile
->free_psymtabs
= psymtab
->next
;
1968 psymtab
= (struct partial_symtab
*)
1969 obstack_alloc (&objfile
->psymbol_obstack
,
1970 sizeof (struct partial_symtab
));
1972 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1973 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
1974 &objfile
->psymbol_obstack
);
1975 psymtab
->symtab
= NULL
;
1977 /* Prepend it to the psymtab list for the objfile it belongs to.
1978 Psymtabs are searched in most recent inserted -> least recent
1981 psymtab
->objfile
= objfile
;
1982 psymtab
->next
= objfile
->psymtabs
;
1983 objfile
->psymtabs
= psymtab
;
1986 struct partial_symtab
**prev_pst
;
1987 psymtab
->objfile
= objfile
;
1988 psymtab
->next
= NULL
;
1989 prev_pst
= &(objfile
->psymtabs
);
1990 while ((*prev_pst
) != NULL
)
1991 prev_pst
= &((*prev_pst
)->next
);
1992 (*prev_pst
) = psymtab
;
2000 discard_psymtab (struct partial_symtab
*pst
)
2002 struct partial_symtab
**prev_pst
;
2005 Empty psymtabs happen as a result of header files which don't
2006 have any symbols in them. There can be a lot of them. But this
2007 check is wrong, in that a psymtab with N_SLINE entries but
2008 nothing else is not empty, but we don't realize that. Fixing
2009 that without slowing things down might be tricky. */
2011 /* First, snip it out of the psymtab chain */
2013 prev_pst
= &(pst
->objfile
->psymtabs
);
2014 while ((*prev_pst
) != pst
)
2015 prev_pst
= &((*prev_pst
)->next
);
2016 (*prev_pst
) = pst
->next
;
2018 /* Next, put it on a free list for recycling */
2020 pst
->next
= pst
->objfile
->free_psymtabs
;
2021 pst
->objfile
->free_psymtabs
= pst
;
2025 /* Reset all data structures in gdb which may contain references to symbol
2029 clear_symtab_users (void)
2031 /* Someday, we should do better than this, by only blowing away
2032 the things that really need to be blown. */
2033 clear_value_history ();
2035 clear_internalvars ();
2036 breakpoint_re_set ();
2037 set_default_breakpoint (0, 0, 0, 0);
2038 current_source_symtab
= 0;
2039 current_source_line
= 0;
2040 clear_pc_function_cache ();
2041 if (target_new_objfile_hook
)
2042 target_new_objfile_hook (NULL
);
2046 clear_symtab_users_cleanup (void *ignore
)
2048 clear_symtab_users ();
2051 /* clear_symtab_users_once:
2053 This function is run after symbol reading, or from a cleanup.
2054 If an old symbol table was obsoleted, the old symbol table
2055 has been blown away, but the other GDB data structures that may
2056 reference it have not yet been cleared or re-directed. (The old
2057 symtab was zapped, and the cleanup queued, in free_named_symtab()
2060 This function can be queued N times as a cleanup, or called
2061 directly; it will do all the work the first time, and then will be a
2062 no-op until the next time it is queued. This works by bumping a
2063 counter at queueing time. Much later when the cleanup is run, or at
2064 the end of symbol processing (in case the cleanup is discarded), if
2065 the queued count is greater than the "done-count", we do the work
2066 and set the done-count to the queued count. If the queued count is
2067 less than or equal to the done-count, we just ignore the call. This
2068 is needed because reading a single .o file will often replace many
2069 symtabs (one per .h file, for example), and we don't want to reset
2070 the breakpoints N times in the user's face.
2072 The reason we both queue a cleanup, and call it directly after symbol
2073 reading, is because the cleanup protects us in case of errors, but is
2074 discarded if symbol reading is successful. */
2077 /* FIXME: As free_named_symtabs is currently a big noop this function
2078 is no longer needed. */
2079 static void clear_symtab_users_once (void);
2081 static int clear_symtab_users_queued
;
2082 static int clear_symtab_users_done
;
2085 clear_symtab_users_once (void)
2087 /* Enforce once-per-`do_cleanups'-semantics */
2088 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2090 clear_symtab_users_done
= clear_symtab_users_queued
;
2092 clear_symtab_users ();
2096 /* Delete the specified psymtab, and any others that reference it. */
2099 cashier_psymtab (struct partial_symtab
*pst
)
2101 struct partial_symtab
*ps
, *pprev
= NULL
;
2104 /* Find its previous psymtab in the chain */
2105 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2114 /* Unhook it from the chain. */
2115 if (ps
== pst
->objfile
->psymtabs
)
2116 pst
->objfile
->psymtabs
= ps
->next
;
2118 pprev
->next
= ps
->next
;
2120 /* FIXME, we can't conveniently deallocate the entries in the
2121 partial_symbol lists (global_psymbols/static_psymbols) that
2122 this psymtab points to. These just take up space until all
2123 the psymtabs are reclaimed. Ditto the dependencies list and
2124 filename, which are all in the psymbol_obstack. */
2126 /* We need to cashier any psymtab that has this one as a dependency... */
2128 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2130 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2132 if (ps
->dependencies
[i
] == pst
)
2134 cashier_psymtab (ps
);
2135 goto again
; /* Must restart, chain has been munged. */
2142 /* If a symtab or psymtab for filename NAME is found, free it along
2143 with any dependent breakpoints, displays, etc.
2144 Used when loading new versions of object modules with the "add-file"
2145 command. This is only called on the top-level symtab or psymtab's name;
2146 it is not called for subsidiary files such as .h files.
2148 Return value is 1 if we blew away the environment, 0 if not.
2149 FIXME. The return value appears to never be used.
2151 FIXME. I think this is not the best way to do this. We should
2152 work on being gentler to the environment while still cleaning up
2153 all stray pointers into the freed symtab. */
2156 free_named_symtabs (char *name
)
2159 /* FIXME: With the new method of each objfile having it's own
2160 psymtab list, this function needs serious rethinking. In particular,
2161 why was it ever necessary to toss psymtabs with specific compilation
2162 unit filenames, as opposed to all psymtabs from a particular symbol
2164 Well, the answer is that some systems permit reloading of particular
2165 compilation units. We want to blow away any old info about these
2166 compilation units, regardless of which objfiles they arrived in. --gnu. */
2168 register struct symtab
*s
;
2169 register struct symtab
*prev
;
2170 register struct partial_symtab
*ps
;
2171 struct blockvector
*bv
;
2174 /* We only wack things if the symbol-reload switch is set. */
2175 if (!symbol_reloading
)
2178 /* Some symbol formats have trouble providing file names... */
2179 if (name
== 0 || *name
== '\0')
2182 /* Look for a psymtab with the specified name. */
2185 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2187 if (STREQ (name
, ps
->filename
))
2189 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2190 goto again2
; /* Must restart, chain has been munged */
2194 /* Look for a symtab with the specified name. */
2196 for (s
= symtab_list
; s
; s
= s
->next
)
2198 if (STREQ (name
, s
->filename
))
2205 if (s
== symtab_list
)
2206 symtab_list
= s
->next
;
2208 prev
->next
= s
->next
;
2210 /* For now, queue a delete for all breakpoints, displays, etc., whether
2211 or not they depend on the symtab being freed. This should be
2212 changed so that only those data structures affected are deleted. */
2214 /* But don't delete anything if the symtab is empty.
2215 This test is necessary due to a bug in "dbxread.c" that
2216 causes empty symtabs to be created for N_SO symbols that
2217 contain the pathname of the object file. (This problem
2218 has been fixed in GDB 3.9x). */
2220 bv
= BLOCKVECTOR (s
);
2221 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2222 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2223 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2225 complain (&oldsyms_complaint
, name
);
2227 clear_symtab_users_queued
++;
2228 make_cleanup (clear_symtab_users_once
, 0);
2233 complain (&empty_symtab_complaint
, name
);
2240 /* It is still possible that some breakpoints will be affected
2241 even though no symtab was found, since the file might have
2242 been compiled without debugging, and hence not be associated
2243 with a symtab. In order to handle this correctly, we would need
2244 to keep a list of text address ranges for undebuggable files.
2245 For now, we do nothing, since this is a fairly obscure case. */
2249 /* FIXME, what about the minimal symbol table? */
2256 /* Allocate and partially fill a partial symtab. It will be
2257 completely filled at the end of the symbol list.
2259 FILENAME is the name of the symbol-file we are reading from. */
2261 struct partial_symtab
*
2262 start_psymtab_common (struct objfile
*objfile
,
2263 struct section_offsets
*section_offsets
, char *filename
,
2264 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2265 struct partial_symbol
**static_syms
)
2267 struct partial_symtab
*psymtab
;
2269 psymtab
= allocate_psymtab (filename
, objfile
);
2270 psymtab
->section_offsets
= section_offsets
;
2271 psymtab
->textlow
= textlow
;
2272 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2273 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2274 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2278 /* Add a symbol with a long value to a psymtab.
2279 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2282 add_psymbol_to_list (char *name
, int namelength
, namespace_enum
namespace,
2283 enum address_class
class,
2284 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2285 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2286 enum language language
, struct objfile
*objfile
)
2288 register struct partial_symbol
*psym
;
2289 char *buf
= alloca (namelength
+ 1);
2290 /* psymbol is static so that there will be no uninitialized gaps in the
2291 structure which might contain random data, causing cache misses in
2293 static struct partial_symbol psymbol
;
2295 /* Create local copy of the partial symbol */
2296 memcpy (buf
, name
, namelength
);
2297 buf
[namelength
] = '\0';
2298 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2299 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2302 SYMBOL_VALUE (&psymbol
) = val
;
2306 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2308 SYMBOL_SECTION (&psymbol
) = 0;
2309 SYMBOL_LANGUAGE (&psymbol
) = language
;
2310 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2311 PSYMBOL_CLASS (&psymbol
) = class;
2312 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2314 /* Stash the partial symbol away in the cache */
2315 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2317 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2318 if (list
->next
>= list
->list
+ list
->size
)
2320 extend_psymbol_list (list
, objfile
);
2322 *list
->next
++ = psym
;
2323 OBJSTAT (objfile
, n_psyms
++);
2326 /* Add a symbol with a long value to a psymtab. This differs from
2327 * add_psymbol_to_list above in taking both a mangled and a demangled
2331 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2332 int dem_namelength
, namespace_enum
namespace,
2333 enum address_class
class,
2334 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2335 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2336 enum language language
,
2337 struct objfile
*objfile
)
2339 register struct partial_symbol
*psym
;
2340 char *buf
= alloca (namelength
+ 1);
2341 /* psymbol is static so that there will be no uninitialized gaps in the
2342 structure which might contain random data, causing cache misses in
2344 static struct partial_symbol psymbol
;
2346 /* Create local copy of the partial symbol */
2348 memcpy (buf
, name
, namelength
);
2349 buf
[namelength
] = '\0';
2350 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2352 buf
= alloca (dem_namelength
+ 1);
2353 memcpy (buf
, dem_name
, dem_namelength
);
2354 buf
[dem_namelength
] = '\0';
2359 case language_cplus
:
2360 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2361 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2363 case language_chill
:
2364 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2365 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2367 /* FIXME What should be done for the default case? Ignoring for now. */
2370 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2373 SYMBOL_VALUE (&psymbol
) = val
;
2377 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2379 SYMBOL_SECTION (&psymbol
) = 0;
2380 SYMBOL_LANGUAGE (&psymbol
) = language
;
2381 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2382 PSYMBOL_CLASS (&psymbol
) = class;
2383 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2385 /* Stash the partial symbol away in the cache */
2386 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2388 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2389 if (list
->next
>= list
->list
+ list
->size
)
2391 extend_psymbol_list (list
, objfile
);
2393 *list
->next
++ = psym
;
2394 OBJSTAT (objfile
, n_psyms
++);
2397 /* Initialize storage for partial symbols. */
2400 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2402 /* Free any previously allocated psymbol lists. */
2404 if (objfile
->global_psymbols
.list
)
2406 mfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2408 if (objfile
->static_psymbols
.list
)
2410 mfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2413 /* Current best guess is that approximately a twentieth
2414 of the total symbols (in a debugging file) are global or static
2417 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2418 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2420 if (objfile
->global_psymbols
.size
> 0)
2422 objfile
->global_psymbols
.next
=
2423 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2424 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2425 * sizeof (struct partial_symbol
*)));
2427 if (objfile
->static_psymbols
.size
> 0)
2429 objfile
->static_psymbols
.next
=
2430 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2431 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2432 * sizeof (struct partial_symbol
*)));
2437 The following code implements an abstraction for debugging overlay sections.
2439 The target model is as follows:
2440 1) The gnu linker will permit multiple sections to be mapped into the
2441 same VMA, each with its own unique LMA (or load address).
2442 2) It is assumed that some runtime mechanism exists for mapping the
2443 sections, one by one, from the load address into the VMA address.
2444 3) This code provides a mechanism for gdb to keep track of which
2445 sections should be considered to be mapped from the VMA to the LMA.
2446 This information is used for symbol lookup, and memory read/write.
2447 For instance, if a section has been mapped then its contents
2448 should be read from the VMA, otherwise from the LMA.
2450 Two levels of debugger support for overlays are available. One is
2451 "manual", in which the debugger relies on the user to tell it which
2452 overlays are currently mapped. This level of support is
2453 implemented entirely in the core debugger, and the information about
2454 whether a section is mapped is kept in the objfile->obj_section table.
2456 The second level of support is "automatic", and is only available if
2457 the target-specific code provides functionality to read the target's
2458 overlay mapping table, and translate its contents for the debugger
2459 (by updating the mapped state information in the obj_section tables).
2461 The interface is as follows:
2463 overlay map <name> -- tell gdb to consider this section mapped
2464 overlay unmap <name> -- tell gdb to consider this section unmapped
2465 overlay list -- list the sections that GDB thinks are mapped
2466 overlay read-target -- get the target's state of what's mapped
2467 overlay off/manual/auto -- set overlay debugging state
2468 Functional interface:
2469 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2470 section, return that section.
2471 find_pc_overlay(pc): find any overlay section that contains
2472 the pc, either in its VMA or its LMA
2473 overlay_is_mapped(sect): true if overlay is marked as mapped
2474 section_is_overlay(sect): true if section's VMA != LMA
2475 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2476 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2477 overlay_mapped_address(...): map an address from section's LMA to VMA
2478 overlay_unmapped_address(...): map an address from section's VMA to LMA
2479 symbol_overlayed_address(...): Return a "current" address for symbol:
2480 either in VMA or LMA depending on whether
2481 the symbol's section is currently mapped
2484 /* Overlay debugging state: */
2486 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2487 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2489 /* Target vector for refreshing overlay mapped state */
2490 static void simple_overlay_update (struct obj_section
*);
2491 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2493 /* Function: section_is_overlay (SECTION)
2494 Returns true if SECTION has VMA not equal to LMA, ie.
2495 SECTION is loaded at an address different from where it will "run". */
2498 section_is_overlay (asection
*section
)
2500 if (overlay_debugging
)
2501 if (section
&& section
->lma
!= 0 &&
2502 section
->vma
!= section
->lma
)
2508 /* Function: overlay_invalidate_all (void)
2509 Invalidate the mapped state of all overlay sections (mark it as stale). */
2512 overlay_invalidate_all (void)
2514 struct objfile
*objfile
;
2515 struct obj_section
*sect
;
2517 ALL_OBJSECTIONS (objfile
, sect
)
2518 if (section_is_overlay (sect
->the_bfd_section
))
2519 sect
->ovly_mapped
= -1;
2522 /* Function: overlay_is_mapped (SECTION)
2523 Returns true if section is an overlay, and is currently mapped.
2524 Private: public access is thru function section_is_mapped.
2526 Access to the ovly_mapped flag is restricted to this function, so
2527 that we can do automatic update. If the global flag
2528 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2529 overlay_invalidate_all. If the mapped state of the particular
2530 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2533 overlay_is_mapped (struct obj_section
*osect
)
2535 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2538 switch (overlay_debugging
)
2542 return 0; /* overlay debugging off */
2543 case -1: /* overlay debugging automatic */
2544 /* Unles there is a target_overlay_update function,
2545 there's really nothing useful to do here (can't really go auto) */
2546 if (target_overlay_update
)
2548 if (overlay_cache_invalid
)
2550 overlay_invalidate_all ();
2551 overlay_cache_invalid
= 0;
2553 if (osect
->ovly_mapped
== -1)
2554 (*target_overlay_update
) (osect
);
2556 /* fall thru to manual case */
2557 case 1: /* overlay debugging manual */
2558 return osect
->ovly_mapped
== 1;
2562 /* Function: section_is_mapped
2563 Returns true if section is an overlay, and is currently mapped. */
2566 section_is_mapped (asection
*section
)
2568 struct objfile
*objfile
;
2569 struct obj_section
*osect
;
2571 if (overlay_debugging
)
2572 if (section
&& section_is_overlay (section
))
2573 ALL_OBJSECTIONS (objfile
, osect
)
2574 if (osect
->the_bfd_section
== section
)
2575 return overlay_is_mapped (osect
);
2580 /* Function: pc_in_unmapped_range
2581 If PC falls into the lma range of SECTION, return true, else false. */
2584 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2588 if (overlay_debugging
)
2589 if (section
&& section_is_overlay (section
))
2591 size
= bfd_get_section_size_before_reloc (section
);
2592 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2598 /* Function: pc_in_mapped_range
2599 If PC falls into the vma range of SECTION, return true, else false. */
2602 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2606 if (overlay_debugging
)
2607 if (section
&& section_is_overlay (section
))
2609 size
= bfd_get_section_size_before_reloc (section
);
2610 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2616 /* Function: overlay_unmapped_address (PC, SECTION)
2617 Returns the address corresponding to PC in the unmapped (load) range.
2618 May be the same as PC. */
2621 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2623 if (overlay_debugging
)
2624 if (section
&& section_is_overlay (section
) &&
2625 pc_in_mapped_range (pc
, section
))
2626 return pc
+ section
->lma
- section
->vma
;
2631 /* Function: overlay_mapped_address (PC, SECTION)
2632 Returns the address corresponding to PC in the mapped (runtime) range.
2633 May be the same as PC. */
2636 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2638 if (overlay_debugging
)
2639 if (section
&& section_is_overlay (section
) &&
2640 pc_in_unmapped_range (pc
, section
))
2641 return pc
+ section
->vma
- section
->lma
;
2647 /* Function: symbol_overlayed_address
2648 Return one of two addresses (relative to the VMA or to the LMA),
2649 depending on whether the section is mapped or not. */
2652 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2654 if (overlay_debugging
)
2656 /* If the symbol has no section, just return its regular address. */
2659 /* If the symbol's section is not an overlay, just return its address */
2660 if (!section_is_overlay (section
))
2662 /* If the symbol's section is mapped, just return its address */
2663 if (section_is_mapped (section
))
2666 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2667 * then return its LOADED address rather than its vma address!!
2669 return overlay_unmapped_address (address
, section
);
2674 /* Function: find_pc_overlay (PC)
2675 Return the best-match overlay section for PC:
2676 If PC matches a mapped overlay section's VMA, return that section.
2677 Else if PC matches an unmapped section's VMA, return that section.
2678 Else if PC matches an unmapped section's LMA, return that section. */
2681 find_pc_overlay (CORE_ADDR pc
)
2683 struct objfile
*objfile
;
2684 struct obj_section
*osect
, *best_match
= NULL
;
2686 if (overlay_debugging
)
2687 ALL_OBJSECTIONS (objfile
, osect
)
2688 if (section_is_overlay (osect
->the_bfd_section
))
2690 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2692 if (overlay_is_mapped (osect
))
2693 return osect
->the_bfd_section
;
2697 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2700 return best_match
? best_match
->the_bfd_section
: NULL
;
2703 /* Function: find_pc_mapped_section (PC)
2704 If PC falls into the VMA address range of an overlay section that is
2705 currently marked as MAPPED, return that section. Else return NULL. */
2708 find_pc_mapped_section (CORE_ADDR pc
)
2710 struct objfile
*objfile
;
2711 struct obj_section
*osect
;
2713 if (overlay_debugging
)
2714 ALL_OBJSECTIONS (objfile
, osect
)
2715 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2716 overlay_is_mapped (osect
))
2717 return osect
->the_bfd_section
;
2722 /* Function: list_overlays_command
2723 Print a list of mapped sections and their PC ranges */
2726 list_overlays_command (char *args
, int from_tty
)
2729 struct objfile
*objfile
;
2730 struct obj_section
*osect
;
2732 if (overlay_debugging
)
2733 ALL_OBJSECTIONS (objfile
, osect
)
2734 if (overlay_is_mapped (osect
))
2740 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2741 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2742 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2743 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2745 printf_filtered ("Section %s, loaded at ", name
);
2746 print_address_numeric (lma
, 1, gdb_stdout
);
2747 puts_filtered (" - ");
2748 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2749 printf_filtered (", mapped at ");
2750 print_address_numeric (vma
, 1, gdb_stdout
);
2751 puts_filtered (" - ");
2752 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2753 puts_filtered ("\n");
2758 printf_filtered ("No sections are mapped.\n");
2761 /* Function: map_overlay_command
2762 Mark the named section as mapped (ie. residing at its VMA address). */
2765 map_overlay_command (char *args
, int from_tty
)
2767 struct objfile
*objfile
, *objfile2
;
2768 struct obj_section
*sec
, *sec2
;
2771 if (!overlay_debugging
)
2773 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2774 the 'overlay manual' command.");
2776 if (args
== 0 || *args
== 0)
2777 error ("Argument required: name of an overlay section");
2779 /* First, find a section matching the user supplied argument */
2780 ALL_OBJSECTIONS (objfile
, sec
)
2781 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2783 /* Now, check to see if the section is an overlay. */
2784 bfdsec
= sec
->the_bfd_section
;
2785 if (!section_is_overlay (bfdsec
))
2786 continue; /* not an overlay section */
2788 /* Mark the overlay as "mapped" */
2789 sec
->ovly_mapped
= 1;
2791 /* Next, make a pass and unmap any sections that are
2792 overlapped by this new section: */
2793 ALL_OBJSECTIONS (objfile2
, sec2
)
2794 if (sec2
->ovly_mapped
&&
2796 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2797 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2798 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2801 printf_filtered ("Note: section %s unmapped by overlap\n",
2802 bfd_section_name (objfile
->obfd
,
2803 sec2
->the_bfd_section
));
2804 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2808 error ("No overlay section called %s", args
);
2811 /* Function: unmap_overlay_command
2812 Mark the overlay section as unmapped
2813 (ie. resident in its LMA address range, rather than the VMA range). */
2816 unmap_overlay_command (char *args
, int from_tty
)
2818 struct objfile
*objfile
;
2819 struct obj_section
*sec
;
2821 if (!overlay_debugging
)
2823 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2824 the 'overlay manual' command.");
2826 if (args
== 0 || *args
== 0)
2827 error ("Argument required: name of an overlay section");
2829 /* First, find a section matching the user supplied argument */
2830 ALL_OBJSECTIONS (objfile
, sec
)
2831 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2833 if (!sec
->ovly_mapped
)
2834 error ("Section %s is not mapped", args
);
2835 sec
->ovly_mapped
= 0;
2838 error ("No overlay section called %s", args
);
2841 /* Function: overlay_auto_command
2842 A utility command to turn on overlay debugging.
2843 Possibly this should be done via a set/show command. */
2846 overlay_auto_command (char *args
, int from_tty
)
2848 overlay_debugging
= -1;
2850 printf_filtered ("Automatic overlay debugging enabled.");
2853 /* Function: overlay_manual_command
2854 A utility command to turn on overlay debugging.
2855 Possibly this should be done via a set/show command. */
2858 overlay_manual_command (char *args
, int from_tty
)
2860 overlay_debugging
= 1;
2862 printf_filtered ("Overlay debugging enabled.");
2865 /* Function: overlay_off_command
2866 A utility command to turn on overlay debugging.
2867 Possibly this should be done via a set/show command. */
2870 overlay_off_command (char *args
, int from_tty
)
2872 overlay_debugging
= 0;
2874 printf_filtered ("Overlay debugging disabled.");
2878 overlay_load_command (char *args
, int from_tty
)
2880 if (target_overlay_update
)
2881 (*target_overlay_update
) (NULL
);
2883 error ("This target does not know how to read its overlay state.");
2886 /* Function: overlay_command
2887 A place-holder for a mis-typed command */
2889 /* Command list chain containing all defined "overlay" subcommands. */
2890 struct cmd_list_element
*overlaylist
;
2893 overlay_command (char *args
, int from_tty
)
2896 ("\"overlay\" must be followed by the name of an overlay command.\n");
2897 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2901 /* Target Overlays for the "Simplest" overlay manager:
2903 This is GDB's default target overlay layer. It works with the
2904 minimal overlay manager supplied as an example by Cygnus. The
2905 entry point is via a function pointer "target_overlay_update",
2906 so targets that use a different runtime overlay manager can
2907 substitute their own overlay_update function and take over the
2910 The overlay_update function pokes around in the target's data structures
2911 to see what overlays are mapped, and updates GDB's overlay mapping with
2914 In this simple implementation, the target data structures are as follows:
2915 unsigned _novlys; /# number of overlay sections #/
2916 unsigned _ovly_table[_novlys][4] = {
2917 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2918 {..., ..., ..., ...},
2920 unsigned _novly_regions; /# number of overlay regions #/
2921 unsigned _ovly_region_table[_novly_regions][3] = {
2922 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2925 These functions will attempt to update GDB's mappedness state in the
2926 symbol section table, based on the target's mappedness state.
2928 To do this, we keep a cached copy of the target's _ovly_table, and
2929 attempt to detect when the cached copy is invalidated. The main
2930 entry point is "simple_overlay_update(SECT), which looks up SECT in
2931 the cached table and re-reads only the entry for that section from
2932 the target (whenever possible).
2935 /* Cached, dynamically allocated copies of the target data structures: */
2936 static unsigned (*cache_ovly_table
)[4] = 0;
2938 static unsigned (*cache_ovly_region_table
)[3] = 0;
2940 static unsigned cache_novlys
= 0;
2942 static unsigned cache_novly_regions
= 0;
2944 static CORE_ADDR cache_ovly_table_base
= 0;
2946 static CORE_ADDR cache_ovly_region_table_base
= 0;
2950 VMA
, SIZE
, LMA
, MAPPED
2952 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2954 /* Throw away the cached copy of _ovly_table */
2956 simple_free_overlay_table (void)
2958 if (cache_ovly_table
)
2959 xfree (cache_ovly_table
);
2961 cache_ovly_table
= NULL
;
2962 cache_ovly_table_base
= 0;
2966 /* Throw away the cached copy of _ovly_region_table */
2968 simple_free_overlay_region_table (void)
2970 if (cache_ovly_region_table
)
2971 xfree (cache_ovly_region_table
);
2972 cache_novly_regions
= 0;
2973 cache_ovly_region_table
= NULL
;
2974 cache_ovly_region_table_base
= 0;
2978 /* Read an array of ints from the target into a local buffer.
2979 Convert to host order. int LEN is number of ints */
2981 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
2983 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
2986 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
2987 for (i
= 0; i
< len
; i
++)
2988 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
2992 /* Find and grab a copy of the target _ovly_table
2993 (and _novlys, which is needed for the table's size) */
2995 simple_read_overlay_table (void)
2997 struct minimal_symbol
*msym
;
2999 simple_free_overlay_table ();
3000 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
3002 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3004 return 0; /* failure */
3005 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3006 if (cache_ovly_table
!= NULL
)
3008 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
3011 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3012 read_target_long_array (cache_ovly_table_base
,
3013 (int *) cache_ovly_table
,
3017 return 0; /* failure */
3020 return 0; /* failure */
3021 return 1; /* SUCCESS */
3025 /* Find and grab a copy of the target _ovly_region_table
3026 (and _novly_regions, which is needed for the table's size) */
3028 simple_read_overlay_region_table (void)
3030 struct minimal_symbol
*msym
;
3032 simple_free_overlay_region_table ();
3033 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
3035 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3037 return 0; /* failure */
3038 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3039 if (cache_ovly_region_table
!= NULL
)
3041 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3044 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3045 read_target_long_array (cache_ovly_region_table_base
,
3046 (int *) cache_ovly_region_table
,
3047 cache_novly_regions
* 3);
3050 return 0; /* failure */
3053 return 0; /* failure */
3054 return 1; /* SUCCESS */
3058 /* Function: simple_overlay_update_1
3059 A helper function for simple_overlay_update. Assuming a cached copy
3060 of _ovly_table exists, look through it to find an entry whose vma,
3061 lma and size match those of OSECT. Re-read the entry and make sure
3062 it still matches OSECT (else the table may no longer be valid).
3063 Set OSECT's mapped state to match the entry. Return: 1 for
3064 success, 0 for failure. */
3067 simple_overlay_update_1 (struct obj_section
*osect
)
3071 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3072 for (i
= 0; i
< cache_novlys
; i
++)
3073 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3074 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3075 cache_ovly_table[i][SIZE] == size */ )
3077 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3078 (int *) cache_ovly_table
[i
], 4);
3079 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3080 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3081 cache_ovly_table[i][SIZE] == size */ )
3083 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3086 else /* Warning! Warning! Target's ovly table has changed! */
3092 /* Function: simple_overlay_update
3093 If OSECT is NULL, then update all sections' mapped state
3094 (after re-reading the entire target _ovly_table).
3095 If OSECT is non-NULL, then try to find a matching entry in the
3096 cached ovly_table and update only OSECT's mapped state.
3097 If a cached entry can't be found or the cache isn't valid, then
3098 re-read the entire cache, and go ahead and update all sections. */
3101 simple_overlay_update (struct obj_section
*osect
)
3103 struct objfile
*objfile
;
3105 /* Were we given an osect to look up? NULL means do all of them. */
3107 /* Have we got a cached copy of the target's overlay table? */
3108 if (cache_ovly_table
!= NULL
)
3109 /* Does its cached location match what's currently in the symtab? */
3110 if (cache_ovly_table_base
==
3111 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3112 /* Then go ahead and try to look up this single section in the cache */
3113 if (simple_overlay_update_1 (osect
))
3114 /* Found it! We're done. */
3117 /* Cached table no good: need to read the entire table anew.
3118 Or else we want all the sections, in which case it's actually
3119 more efficient to read the whole table in one block anyway. */
3121 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3123 warning ("Failed to read the target overlay mapping table.");
3126 /* Now may as well update all sections, even if only one was requested. */
3127 ALL_OBJSECTIONS (objfile
, osect
)
3128 if (section_is_overlay (osect
->the_bfd_section
))
3132 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3133 for (i
= 0; i
< cache_novlys
; i
++)
3134 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3135 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3136 cache_ovly_table[i][SIZE] == size */ )
3137 { /* obj_section matches i'th entry in ovly_table */
3138 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3139 break; /* finished with inner for loop: break out */
3146 _initialize_symfile (void)
3148 struct cmd_list_element
*c
;
3150 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3151 "Load symbol table from executable file FILE.\n\
3152 The `file' command can also load symbol tables, as well as setting the file\n\
3153 to execute.", &cmdlist
);
3154 c
->completer
= filename_completer
;
3156 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3157 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3158 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3159 ADDR is the starting address of the file's text.\n\
3160 The optional arguments are section-name section-address pairs and\n\
3161 should be specified if the data and bss segments are not contiguous\n\
3162 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3164 c
->completer
= filename_completer
;
3166 c
= add_cmd ("add-shared-symbol-files", class_files
,
3167 add_shared_symbol_files_command
,
3168 "Load the symbols from shared objects in the dynamic linker's link map.",
3170 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3173 c
= add_cmd ("load", class_files
, load_command
,
3174 "Dynamically load FILE into the running program, and record its symbols\n\
3175 for access from GDB.", &cmdlist
);
3176 c
->completer
= filename_completer
;
3179 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3180 (char *) &symbol_reloading
,
3181 "Set dynamic symbol table reloading multiple times in one run.",
3185 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3186 "Commands for debugging overlays.", &overlaylist
,
3187 "overlay ", 0, &cmdlist
);
3189 add_com_alias ("ovly", "overlay", class_alias
, 1);
3190 add_com_alias ("ov", "overlay", class_alias
, 1);
3192 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3193 "Assert that an overlay section is mapped.", &overlaylist
);
3195 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3196 "Assert that an overlay section is unmapped.", &overlaylist
);
3198 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3199 "List mappings of overlay sections.", &overlaylist
);
3201 add_cmd ("manual", class_support
, overlay_manual_command
,
3202 "Enable overlay debugging.", &overlaylist
);
3203 add_cmd ("off", class_support
, overlay_off_command
,
3204 "Disable overlay debugging.", &overlaylist
);
3205 add_cmd ("auto", class_support
, overlay_auto_command
,
3206 "Enable automatic overlay debugging.", &overlaylist
);
3207 add_cmd ("load-target", class_support
, overlay_load_command
,
3208 "Read the overlay mapping state from the target.", &overlaylist
);
3210 /* Filename extension to source language lookup table: */
3211 init_filename_language_table ();
3212 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3214 "Set mapping between filename extension and source language.\n\
3215 Usage: set extension-language .foo bar",
3217 c
->function
.cfunc
= set_ext_lang_command
;
3219 add_info ("extensions", info_ext_lang_command
,
3220 "All filename extensions associated with a source language.");
3223 (add_set_cmd ("download-write-size", class_obscure
,
3224 var_integer
, (char *) &download_write_size
,
3225 "Set the write size used when downloading a program.\n"
3226 "Only used when downloading a program onto a remote\n"
3227 "target. Specify zero, or a negative value, to disable\n"
3228 "blocked writes. The actual size of each transfer is also\n"
3229 "limited by the size of the target packet and the memory\n"