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 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
114 static void add_symbol_file_command (char *, int);
116 static void add_shared_symbol_files_command (char *, int);
118 static void cashier_psymtab (struct partial_symtab
*);
120 bfd
*symfile_bfd_open (char *);
122 static void find_sym_fns (struct objfile
*);
124 static void decrement_reading_symtab (void *);
126 static void overlay_invalidate_all (void);
128 static int overlay_is_mapped (struct obj_section
*);
130 void list_overlays_command (char *, int);
132 void map_overlay_command (char *, int);
134 void unmap_overlay_command (char *, int);
136 static void overlay_auto_command (char *, int);
138 static void overlay_manual_command (char *, int);
140 static void overlay_off_command (char *, int);
142 static void overlay_load_command (char *, int);
144 static void overlay_command (char *, int);
146 static void simple_free_overlay_table (void);
148 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
150 static int simple_read_overlay_table (void);
152 static int simple_overlay_update_1 (struct obj_section
*);
154 static void add_filename_language (char *ext
, enum language lang
);
156 static void set_ext_lang_command (char *args
, int from_tty
);
158 static void info_ext_lang_command (char *args
, int from_tty
);
160 static void init_filename_language_table (void);
162 void _initialize_symfile (void);
164 /* List of all available sym_fns. On gdb startup, each object file reader
165 calls add_symtab_fns() to register information on each format it is
168 static struct sym_fns
*symtab_fns
= NULL
;
170 /* Flag for whether user will be reloading symbols multiple times.
171 Defaults to ON for VxWorks, otherwise OFF. */
173 #ifdef SYMBOL_RELOADING_DEFAULT
174 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
176 int symbol_reloading
= 0;
179 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
180 this variable is interpreted as a threshhold. If adding a new
181 library's symbol table to those already known to the debugger would
182 exceed this threshhold, then the shlib's symbols are not added.
184 If non-zero on other platforms, shared library symbols will be added
185 automatically when the inferior is created, new libraries are loaded,
186 or when attaching to the inferior. This is almost always what users
187 will want to have happen; but for very large programs, the startup
188 time will be excessive, and so if this is a problem, the user can
189 clear this flag and then add the shared library symbols as needed.
190 Note that there is a potential for confusion, since if the shared
191 library symbols are not loaded, commands like "info fun" will *not*
192 report all the functions that are actually present.
194 Note that HP-UX interprets this variable to mean, "threshhold size
195 in megabytes, where zero means never add". Other platforms interpret
196 this variable to mean, "always add if non-zero, never add if zero."
199 int auto_solib_add
= 1;
202 /* Since this function is called from within qsort, in an ANSI environment
203 it must conform to the prototype for qsort, which specifies that the
204 comparison function takes two "void *" pointers. */
207 compare_symbols (const void *s1p
, const void *s2p
)
209 register struct symbol
**s1
, **s2
;
211 s1
= (struct symbol
**) s1p
;
212 s2
= (struct symbol
**) s2p
;
213 return (strcmp (SYMBOL_SOURCE_NAME (*s1
), SYMBOL_SOURCE_NAME (*s2
)));
220 compare_psymbols -- compare two partial symbols by name
224 Given pointers to pointers to two partial symbol table entries,
225 compare them by name and return -N, 0, or +N (ala strcmp).
226 Typically used by sorting routines like qsort().
230 Does direct compare of first two characters before punting
231 and passing to strcmp for longer compares. Note that the
232 original version had a bug whereby two null strings or two
233 identically named one character strings would return the
234 comparison of memory following the null byte.
239 compare_psymbols (const void *s1p
, const void *s2p
)
241 register struct partial_symbol
**s1
, **s2
;
242 register char *st1
, *st2
;
244 s1
= (struct partial_symbol
**) s1p
;
245 s2
= (struct partial_symbol
**) s2p
;
246 st1
= SYMBOL_SOURCE_NAME (*s1
);
247 st2
= SYMBOL_SOURCE_NAME (*s2
);
250 if ((st1
[0] - st2
[0]) || !st1
[0])
252 return (st1
[0] - st2
[0]);
254 else if ((st1
[1] - st2
[1]) || !st1
[1])
256 return (st1
[1] - st2
[1]);
260 return (strcmp (st1
, st2
));
265 sort_pst_symbols (struct partial_symtab
*pst
)
267 /* Sort the global list; don't sort the static list */
269 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
270 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
274 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
277 sort_block_syms (register struct block
*b
)
279 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
280 sizeof (struct symbol
*), compare_symbols
);
283 /* Call sort_symtab_syms to sort alphabetically
284 the symbols of each block of one symtab. */
287 sort_symtab_syms (register struct symtab
*s
)
289 register struct blockvector
*bv
;
292 register struct block
*b
;
296 bv
= BLOCKVECTOR (s
);
297 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
298 for (i
= 0; i
< nbl
; i
++)
300 b
= BLOCKVECTOR_BLOCK (bv
, i
);
301 if (BLOCK_SHOULD_SORT (b
))
306 /* Make a null terminated copy of the string at PTR with SIZE characters in
307 the obstack pointed to by OBSTACKP . Returns the address of the copy.
308 Note that the string at PTR does not have to be null terminated, I.E. it
309 may be part of a larger string and we are only saving a substring. */
312 obsavestring (char *ptr
, int size
, struct obstack
*obstackp
)
314 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
315 /* Open-coded memcpy--saves function call time. These strings are usually
316 short. FIXME: Is this really still true with a compiler that can
319 register char *p1
= ptr
;
320 register char *p2
= p
;
321 char *end
= ptr
+ size
;
329 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
330 in the obstack pointed to by OBSTACKP. */
333 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
336 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
337 register char *val
= (char *) obstack_alloc (obstackp
, len
);
344 /* True if we are nested inside psymtab_to_symtab. */
346 int currently_reading_symtab
= 0;
349 decrement_reading_symtab (void *dummy
)
351 currently_reading_symtab
--;
354 /* Get the symbol table that corresponds to a partial_symtab.
355 This is fast after the first time you do it. In fact, there
356 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
360 psymtab_to_symtab (register struct partial_symtab
*pst
)
362 /* If it's been looked up before, return it. */
366 /* If it has not yet been read in, read it. */
369 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
370 currently_reading_symtab
++;
371 (*pst
->read_symtab
) (pst
);
372 do_cleanups (back_to
);
378 /* Initialize entry point information for this objfile. */
381 init_entry_point_info (struct objfile
*objfile
)
383 /* Save startup file's range of PC addresses to help blockframe.c
384 decide where the bottom of the stack is. */
386 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
388 /* Executable file -- record its entry point so we'll recognize
389 the startup file because it contains the entry point. */
390 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
394 /* Examination of non-executable.o files. Short-circuit this stuff. */
395 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
397 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
398 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
399 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
400 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
401 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
402 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
405 /* Get current entry point address. */
408 entry_point_address (void)
410 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
413 /* Remember the lowest-addressed loadable section we've seen.
414 This function is called via bfd_map_over_sections.
416 In case of equal vmas, the section with the largest size becomes the
417 lowest-addressed loadable section.
419 If the vmas and sizes are equal, the last section is considered the
420 lowest-addressed loadable section. */
423 find_lowest_section (bfd
*abfd
, asection
*sect
, PTR obj
)
425 asection
**lowest
= (asection
**) obj
;
427 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
430 *lowest
= sect
; /* First loadable section */
431 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
432 *lowest
= sect
; /* A lower loadable section */
433 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
434 && (bfd_section_size (abfd
, (*lowest
))
435 <= bfd_section_size (abfd
, sect
)))
440 /* Build (allocate and populate) a section_addr_info struct from
441 an existing section table. */
443 extern struct section_addr_info
*
444 build_section_addr_info_from_section_table (const struct section_table
*start
,
445 const struct section_table
*end
)
447 struct section_addr_info
*sap
;
448 const struct section_table
*stp
;
451 sap
= xmalloc (sizeof (struct section_addr_info
));
452 memset (sap
, 0, sizeof (struct section_addr_info
));
454 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
456 if (stp
->the_bfd_section
->flags
& (SEC_ALLOC
| SEC_LOAD
)
457 && oidx
< MAX_SECTIONS
)
459 sap
->other
[oidx
].addr
= stp
->addr
;
460 sap
->other
[oidx
].name
= xstrdup (stp
->the_bfd_section
->name
);
461 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
470 /* Free all memory allocated by build_section_addr_info_from_section_table. */
473 free_section_addr_info (struct section_addr_info
*sap
)
477 for (idx
= 0; idx
< MAX_SECTIONS
; idx
++)
478 if (sap
->other
[idx
].name
)
479 xfree (sap
->other
[idx
].name
);
484 /* Parse the user's idea of an offset for dynamic linking, into our idea
485 of how to represent it for fast symbol reading. This is the default
486 version of the sym_fns.sym_offsets function for symbol readers that
487 don't need to do anything special. It allocates a section_offsets table
488 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
491 default_symfile_offsets (struct objfile
*objfile
,
492 struct section_addr_info
*addrs
)
495 asection
*sect
= NULL
;
497 objfile
->num_sections
= SECT_OFF_MAX
;
498 objfile
->section_offsets
= (struct section_offsets
*)
499 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
500 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
502 /* Now calculate offsets for section that were specified by the
504 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
506 struct other_sections
*osp
;
508 osp
= &addrs
->other
[i
] ;
512 /* Record all sections in offsets */
513 /* The section_offsets in the objfile are here filled in using
515 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
518 /* Remember the bfd indexes for the .text, .data, .bss and
521 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
523 objfile
->sect_index_text
= sect
->index
;
525 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
527 objfile
->sect_index_data
= sect
->index
;
529 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
531 objfile
->sect_index_bss
= sect
->index
;
533 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
535 objfile
->sect_index_rodata
= sect
->index
;
539 /* Process a symbol file, as either the main file or as a dynamically
542 OBJFILE is where the symbols are to be read from.
544 ADDR is the address where the text segment was loaded, unless the
545 objfile is the main symbol file, in which case it is zero.
547 MAINLINE is nonzero if this is the main symbol file, or zero if
548 it's an extra symbol file such as dynamically loaded code.
550 VERBO is nonzero if the caller has printed a verbose message about
551 the symbol reading (and complaints can be more terse about it). */
554 syms_from_objfile (struct objfile
*objfile
, struct section_addr_info
*addrs
,
555 int mainline
, int verbo
)
557 asection
*lower_sect
;
559 CORE_ADDR lower_offset
;
560 struct section_addr_info local_addr
;
561 struct cleanup
*old_chain
;
564 /* If ADDRS is NULL, initialize the local section_addr_info struct and
565 point ADDRS to it. We now establish the convention that an addr of
566 zero means no load address was specified. */
570 memset (&local_addr
, 0, sizeof (local_addr
));
574 init_entry_point_info (objfile
);
575 find_sym_fns (objfile
);
577 /* Make sure that partially constructed symbol tables will be cleaned up
578 if an error occurs during symbol reading. */
579 old_chain
= make_cleanup_free_objfile (objfile
);
583 /* We will modify the main symbol table, make sure that all its users
584 will be cleaned up if an error occurs during symbol reading. */
585 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
587 /* Since no error yet, throw away the old symbol table. */
589 if (symfile_objfile
!= NULL
)
591 free_objfile (symfile_objfile
);
592 symfile_objfile
= NULL
;
595 /* Currently we keep symbols from the add-symbol-file command.
596 If the user wants to get rid of them, they should do "symbol-file"
597 without arguments first. Not sure this is the best behavior
600 (*objfile
->sf
->sym_new_init
) (objfile
);
603 /* Convert addr into an offset rather than an absolute address.
604 We find the lowest address of a loaded segment in the objfile,
605 and assume that <addr> is where that got loaded.
607 We no longer warn if the lowest section is not a text segment (as
608 happens for the PA64 port. */
611 /* Find lowest loadable section to be used as starting point for
612 continguous sections. FIXME!! won't work without call to find
613 .text first, but this assumes text is lowest section. */
614 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
615 if (lower_sect
== NULL
)
616 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
618 if (lower_sect
== NULL
)
619 warning ("no loadable sections found in added symbol-file %s",
622 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
623 warning ("Lowest section in %s is %s at %s",
625 bfd_section_name (objfile
->obfd
, lower_sect
),
626 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
627 if (lower_sect
!= NULL
)
628 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
632 /* Calculate offsets for the loadable sections.
633 FIXME! Sections must be in order of increasing loadable section
634 so that contiguous sections can use the lower-offset!!!
636 Adjust offsets if the segments are not contiguous.
637 If the section is contiguous, its offset should be set to
638 the offset of the highest loadable section lower than it
639 (the loadable section directly below it in memory).
640 this_offset = lower_offset = lower_addr - lower_orig_addr */
642 /* Calculate offsets for sections. */
643 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
645 if (addrs
->other
[i
].addr
!= 0)
647 sect
= bfd_get_section_by_name (objfile
->obfd
, addrs
->other
[i
].name
);
650 addrs
->other
[i
].addr
-= bfd_section_vma (objfile
->obfd
, sect
);
651 lower_offset
= addrs
->other
[i
].addr
;
652 /* This is the index used by BFD. */
653 addrs
->other
[i
].sectindex
= sect
->index
;
657 warning ("section %s not found in %s", addrs
->other
[i
].name
,
659 addrs
->other
[i
].addr
= 0;
663 addrs
->other
[i
].addr
= lower_offset
;
667 /* Initialize symbol reading routines for this objfile, allow complaints to
668 appear for this new file, and record how verbose to be, then do the
669 initial symbol reading for this file. */
671 (*objfile
->sf
->sym_init
) (objfile
);
672 clear_complaints (1, verbo
);
674 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
676 #ifndef IBM6000_TARGET
677 /* This is a SVR4/SunOS specific hack, I think. In any event, it
678 screws RS/6000. sym_offsets should be doing this sort of thing,
679 because it knows the mapping between bfd sections and
681 /* This is a hack. As far as I can tell, section offsets are not
682 target dependent. They are all set to addr with a couple of
683 exceptions. The exceptions are sysvr4 shared libraries, whose
684 offsets are kept in solib structures anyway and rs6000 xcoff
685 which handles shared libraries in a completely unique way.
687 Section offsets are built similarly, except that they are built
688 by adding addr in all cases because there is no clear mapping
689 from section_offsets into actual sections. Note that solib.c
690 has a different algorithm for finding section offsets.
692 These should probably all be collapsed into some target
693 independent form of shared library support. FIXME. */
697 struct obj_section
*s
;
699 /* Map section offsets in "addr" back to the object's
700 sections by comparing the section names with bfd's
701 section names. Then adjust the section address by
702 the offset. */ /* for gdb/13815 */
704 ALL_OBJFILE_OSECTIONS (objfile
, s
)
706 CORE_ADDR s_addr
= 0;
710 !s_addr
&& i
< MAX_SECTIONS
&& addrs
->other
[i
].name
;
712 if (strcmp (s
->the_bfd_section
->name
, addrs
->other
[i
].name
) == 0)
713 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
715 s
->addr
-= s
->offset
;
717 s
->endaddr
-= s
->offset
;
718 s
->endaddr
+= s_addr
;
722 #endif /* not IBM6000_TARGET */
724 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
726 if (!have_partial_symbols () && !have_full_symbols ())
729 printf_filtered ("(no debugging symbols found)...");
733 /* Don't allow char * to have a typename (else would get caddr_t).
734 Ditto void *. FIXME: Check whether this is now done by all the
735 symbol readers themselves (many of them now do), and if so remove
738 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
739 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
741 /* Mark the objfile has having had initial symbol read attempted. Note
742 that this does not mean we found any symbols... */
744 objfile
->flags
|= OBJF_SYMS
;
746 /* Discard cleanups as symbol reading was successful. */
748 discard_cleanups (old_chain
);
750 /* Call this after reading in a new symbol table to give target
751 dependent code a crack at the new symbols. For instance, this
752 could be used to update the values of target-specific symbols GDB
753 needs to keep track of (such as _sigtramp, or whatever). */
755 TARGET_SYMFILE_POSTREAD (objfile
);
758 /* Perform required actions after either reading in the initial
759 symbols for a new objfile, or mapping in the symbols from a reusable
763 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
766 /* If this is the main symbol file we have to clean up all users of the
767 old main symbol file. Otherwise it is sufficient to fixup all the
768 breakpoints that may have been redefined by this symbol file. */
771 /* OK, make it the "real" symbol file. */
772 symfile_objfile
= objfile
;
774 clear_symtab_users ();
778 breakpoint_re_set ();
781 /* We're done reading the symbol file; finish off complaints. */
782 clear_complaints (0, verbo
);
785 /* Process a symbol file, as either the main file or as a dynamically
788 NAME is the file name (which will be tilde-expanded and made
789 absolute herein) (but we don't free or modify NAME itself).
790 FROM_TTY says how verbose to be. MAINLINE specifies whether this
791 is the main symbol file, or whether it's an extra symbol file such
792 as dynamically loaded code. If !mainline, ADDR is the address
793 where the text segment was loaded.
795 Upon success, returns a pointer to the objfile that was added.
796 Upon failure, jumps back to command level (never returns). */
799 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
800 int mainline
, int flags
)
802 struct objfile
*objfile
;
803 struct partial_symtab
*psymtab
;
806 /* Open a bfd for the file, and give user a chance to burp if we'd be
807 interactively wiping out any existing symbols. */
809 abfd
= symfile_bfd_open (name
);
811 if ((have_full_symbols () || have_partial_symbols ())
814 && !query ("Load new symbol table from \"%s\"? ", name
))
815 error ("Not confirmed.");
817 objfile
= allocate_objfile (abfd
, flags
);
819 /* If the objfile uses a mapped symbol file, and we have a psymtab for
820 it, then skip reading any symbols at this time. */
822 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
824 /* We mapped in an existing symbol table file that already has had
825 initial symbol reading performed, so we can skip that part. Notify
826 the user that instead of reading the symbols, they have been mapped.
828 if (from_tty
|| info_verbose
)
830 printf_filtered ("Mapped symbols for %s...", name
);
832 gdb_flush (gdb_stdout
);
834 init_entry_point_info (objfile
);
835 find_sym_fns (objfile
);
839 /* We either created a new mapped symbol table, mapped an existing
840 symbol table file which has not had initial symbol reading
841 performed, or need to read an unmapped symbol table. */
842 if (from_tty
|| info_verbose
)
844 if (pre_add_symbol_hook
)
845 pre_add_symbol_hook (name
);
848 printf_filtered ("Reading symbols from %s...", name
);
850 gdb_flush (gdb_stdout
);
853 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
856 /* We now have at least a partial symbol table. Check to see if the
857 user requested that all symbols be read on initial access via either
858 the gdb startup command line or on a per symbol file basis. Expand
859 all partial symbol tables for this objfile if so. */
861 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
863 if (from_tty
|| info_verbose
)
865 printf_filtered ("expanding to full symbols...");
867 gdb_flush (gdb_stdout
);
870 for (psymtab
= objfile
->psymtabs
;
872 psymtab
= psymtab
->next
)
874 psymtab_to_symtab (psymtab
);
878 if (from_tty
|| info_verbose
)
880 if (post_add_symbol_hook
)
881 post_add_symbol_hook ();
884 printf_filtered ("done.\n");
885 gdb_flush (gdb_stdout
);
889 new_symfile_objfile (objfile
, mainline
, from_tty
);
891 if (target_new_objfile_hook
)
892 target_new_objfile_hook (objfile
);
897 /* Call symbol_file_add() with default values and update whatever is
898 affected by the loading of a new main().
899 Used when the file is supplied in the gdb command line
900 and by some targets with special loading requirements.
901 The auxiliary function, symbol_file_add_main_1(), has the flags
902 argument for the switches that can only be specified in the symbol_file
906 symbol_file_add_main (char *args
, int from_tty
)
908 symbol_file_add_main_1 (args
, from_tty
, 0);
912 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
914 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
917 RESET_HP_UX_GLOBALS ();
920 /* Getting new symbols may change our opinion about
921 what is frameless. */
922 reinit_frame_cache ();
924 set_initial_language ();
928 symbol_file_clear (int from_tty
)
930 if ((have_full_symbols () || have_partial_symbols ())
932 && !query ("Discard symbol table from `%s'? ",
933 symfile_objfile
->name
))
934 error ("Not confirmed.");
935 free_all_objfiles ();
937 /* solib descriptors may have handles to objfiles. Since their
938 storage has just been released, we'd better wipe the solib
941 #if defined(SOLIB_RESTART)
945 symfile_objfile
= NULL
;
947 printf_unfiltered ("No symbol file now.\n");
949 RESET_HP_UX_GLOBALS ();
953 /* This is the symbol-file command. Read the file, analyze its
954 symbols, and add a struct symtab to a symtab list. The syntax of
955 the command is rather bizarre--(1) buildargv implements various
956 quoting conventions which are undocumented and have little or
957 nothing in common with the way things are quoted (or not quoted)
958 elsewhere in GDB, (2) options are used, which are not generally
959 used in GDB (perhaps "set mapped on", "set readnow on" would be
960 better), (3) the order of options matters, which is contrary to GNU
961 conventions (because it is confusing and inconvenient). */
962 /* Note: ezannoni 2000-04-17. This function used to have support for
963 rombug (see remote-os9k.c). It consisted of a call to target_link()
964 (target.c) to get the address of the text segment from the target,
965 and pass that to symbol_file_add(). This is no longer supported. */
968 symbol_file_command (char *args
, int from_tty
)
972 struct cleanup
*cleanups
;
973 int flags
= OBJF_USERLOADED
;
979 symbol_file_clear (from_tty
);
983 if ((argv
= buildargv (args
)) == NULL
)
987 cleanups
= make_cleanup_freeargv (argv
);
988 while (*argv
!= NULL
)
990 if (STREQ (*argv
, "-mapped"))
991 flags
|= OBJF_MAPPED
;
993 if (STREQ (*argv
, "-readnow"))
994 flags
|= OBJF_READNOW
;
997 error ("unknown option `%s'", *argv
);
1002 symbol_file_add_main_1 (name
, from_tty
, flags
);
1009 error ("no symbol file name was specified");
1011 do_cleanups (cleanups
);
1015 /* Set the initial language.
1017 A better solution would be to record the language in the psymtab when reading
1018 partial symbols, and then use it (if known) to set the language. This would
1019 be a win for formats that encode the language in an easily discoverable place,
1020 such as DWARF. For stabs, we can jump through hoops looking for specially
1021 named symbols or try to intuit the language from the specific type of stabs
1022 we find, but we can't do that until later when we read in full symbols.
1026 set_initial_language (void)
1028 struct partial_symtab
*pst
;
1029 enum language lang
= language_unknown
;
1031 pst
= find_main_psymtab ();
1034 if (pst
->filename
!= NULL
)
1036 lang
= deduce_language_from_filename (pst
->filename
);
1038 if (lang
== language_unknown
)
1040 /* Make C the default language */
1043 set_language (lang
);
1044 expected_language
= current_language
; /* Don't warn the user */
1048 /* Open file specified by NAME and hand it off to BFD for preliminary
1049 analysis. Result is a newly initialized bfd *, which includes a newly
1050 malloc'd` copy of NAME (tilde-expanded and made absolute).
1051 In case of trouble, error() is called. */
1054 symfile_bfd_open (char *name
)
1058 char *absolute_name
;
1062 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1064 /* Look down path for it, allocate 2nd new malloc'd copy. */
1065 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1066 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1069 char *exename
= alloca (strlen (name
) + 5);
1070 strcat (strcpy (exename
, name
), ".exe");
1071 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1077 make_cleanup (xfree
, name
);
1078 perror_with_name (name
);
1080 xfree (name
); /* Free 1st new malloc'd copy */
1081 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1082 /* It'll be freed in free_objfile(). */
1084 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1088 make_cleanup (xfree
, name
);
1089 error ("\"%s\": can't open to read symbols: %s.", name
,
1090 bfd_errmsg (bfd_get_error ()));
1092 sym_bfd
->cacheable
= true;
1094 if (!bfd_check_format (sym_bfd
, bfd_object
))
1096 /* FIXME: should be checking for errors from bfd_close (for one thing,
1097 on error it does not free all the storage associated with the
1099 bfd_close (sym_bfd
); /* This also closes desc */
1100 make_cleanup (xfree
, name
);
1101 error ("\"%s\": can't read symbols: %s.", name
,
1102 bfd_errmsg (bfd_get_error ()));
1107 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1108 startup by the _initialize routine in each object file format reader,
1109 to register information about each format the the reader is prepared
1113 add_symtab_fns (struct sym_fns
*sf
)
1115 sf
->next
= symtab_fns
;
1120 /* Initialize to read symbols from the symbol file sym_bfd. It either
1121 returns or calls error(). The result is an initialized struct sym_fns
1122 in the objfile structure, that contains cached information about the
1126 find_sym_fns (struct objfile
*objfile
)
1129 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1130 char *our_target
= bfd_get_target (objfile
->obfd
);
1132 /* Special kludge for apollo. See dstread.c. */
1133 if (STREQN (our_target
, "apollo", 6))
1134 our_flavour
= (enum bfd_flavour
) -2;
1136 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1138 if (our_flavour
== sf
->sym_flavour
)
1144 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1145 bfd_get_target (objfile
->obfd
));
1148 /* This function runs the load command of our current target. */
1151 load_command (char *arg
, int from_tty
)
1154 arg
= get_exec_file (1);
1155 target_load (arg
, from_tty
);
1158 /* This version of "load" should be usable for any target. Currently
1159 it is just used for remote targets, not inftarg.c or core files,
1160 on the theory that only in that case is it useful.
1162 Avoiding xmodem and the like seems like a win (a) because we don't have
1163 to worry about finding it, and (b) On VMS, fork() is very slow and so
1164 we don't want to run a subprocess. On the other hand, I'm not sure how
1165 performance compares. */
1167 static int download_write_size
= 512;
1168 static int validate_download
= 0;
1171 generic_load (char *args
, int from_tty
)
1175 time_t start_time
, end_time
; /* Start and end times of download */
1176 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1177 unsigned long write_count
= 0; /* Number of writes needed. */
1178 unsigned long load_offset
; /* offset to add to vma for each section */
1180 struct cleanup
*old_cleanups
;
1182 CORE_ADDR total_size
= 0;
1183 CORE_ADDR total_sent
= 0;
1185 /* Parse the input argument - the user can specify a load offset as
1186 a second argument. */
1187 filename
= xmalloc (strlen (args
) + 1);
1188 old_cleanups
= make_cleanup (xfree
, filename
);
1189 strcpy (filename
, args
);
1190 offptr
= strchr (filename
, ' ');
1194 load_offset
= strtoul (offptr
, &endptr
, 0);
1195 if (offptr
== endptr
)
1196 error ("Invalid download offset:%s\n", offptr
);
1202 /* Open the file for loading. */
1203 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1204 if (loadfile_bfd
== NULL
)
1206 perror_with_name (filename
);
1210 /* FIXME: should be checking for errors from bfd_close (for one thing,
1211 on error it does not free all the storage associated with the
1213 make_cleanup_bfd_close (loadfile_bfd
);
1215 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1217 error ("\"%s\" is not an object file: %s", filename
,
1218 bfd_errmsg (bfd_get_error ()));
1221 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1222 if (s
->flags
& SEC_LOAD
)
1223 total_size
+= bfd_get_section_size_before_reloc (s
);
1225 start_time
= time (NULL
);
1227 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1229 if (s
->flags
& SEC_LOAD
)
1231 CORE_ADDR size
= bfd_get_section_size_before_reloc (s
);
1235 struct cleanup
*old_chain
;
1236 CORE_ADDR lma
= s
->lma
+ load_offset
;
1237 CORE_ADDR block_size
;
1239 const char *sect_name
= bfd_get_section_name (loadfile_bfd
, s
);
1242 if (download_write_size
> 0 && size
> download_write_size
)
1243 block_size
= download_write_size
;
1247 buffer
= xmalloc (size
);
1248 old_chain
= make_cleanup (xfree
, buffer
);
1250 /* Is this really necessary? I guess it gives the user something
1251 to look at during a long download. */
1253 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1254 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1256 fprintf_unfiltered (gdb_stdout
,
1257 "Loading section %s, size 0x%s lma 0x%s\n",
1258 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1261 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1267 CORE_ADDR this_transfer
= size
- sent
;
1268 if (this_transfer
>= block_size
)
1269 this_transfer
= block_size
;
1270 len
= target_write_memory_partial (lma
, buffer
,
1271 this_transfer
, &err
);
1274 if (validate_download
)
1276 /* Broken memories and broken monitors manifest
1277 themselves here when bring new computers to
1278 life. This doubles already slow downloads. */
1279 /* NOTE: cagney/1999-10-18: A more efficient
1280 implementation might add a verify_memory()
1281 method to the target vector and then use
1282 that. remote.c could implement that method
1283 using the ``qCRC'' packet. */
1284 char *check
= xmalloc (len
);
1285 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1286 if (target_read_memory (lma
, check
, len
) != 0)
1287 error ("Download verify read failed at 0x%s",
1289 if (memcmp (buffer
, check
, len
) != 0)
1290 error ("Download verify compare failed at 0x%s",
1292 do_cleanups (verify_cleanups
);
1301 || (ui_load_progress_hook
!= NULL
1302 && ui_load_progress_hook (sect_name
, sent
)))
1303 error ("Canceled the download");
1305 if (show_load_progress
!= NULL
)
1306 show_load_progress (sect_name
, sent
, size
, total_sent
, total_size
);
1308 while (sent
< size
);
1311 error ("Memory access error while loading section %s.", sect_name
);
1313 do_cleanups (old_chain
);
1318 end_time
= time (NULL
);
1321 entry
= bfd_get_start_address (loadfile_bfd
);
1323 ui_out_text (uiout
, "Start address ");
1324 ui_out_field_fmt (uiout
, "address", "0x%s" , paddr_nz (entry
));
1325 ui_out_text (uiout
, ", load size ");
1326 ui_out_field_fmt (uiout
, "load-size", "%ld" , data_count
);
1327 ui_out_text (uiout
, "\n");
1330 fprintf_unfiltered (gdb_stdout
,
1331 "Start address 0x%s , load size %ld\n",
1332 paddr_nz (entry
), data_count
);
1334 /* We were doing this in remote-mips.c, I suspect it is right
1335 for other targets too. */
1339 /* FIXME: are we supposed to call symbol_file_add or not? According to
1340 a comment from remote-mips.c (where a call to symbol_file_add was
1341 commented out), making the call confuses GDB if more than one file is
1342 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1345 print_transfer_performance (gdb_stdout
, data_count
, write_count
,
1346 end_time
- start_time
);
1348 do_cleanups (old_cleanups
);
1351 /* Report how fast the transfer went. */
1353 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1354 replaced by print_transfer_performance (with a very different
1355 function signature). */
1358 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1361 print_transfer_performance (gdb_stdout
, data_count
, end_time
- start_time
, 0);
1365 print_transfer_performance (struct ui_file
*stream
,
1366 unsigned long data_count
,
1367 unsigned long write_count
,
1368 unsigned long time_count
)
1371 ui_out_text (uiout
, "Transfer rate: ");
1374 ui_out_field_fmt (uiout
, "transfer-rate", "%ld",
1375 (data_count
* 8) / time_count
);
1376 ui_out_text (uiout
, " bits/sec");
1380 ui_out_field_fmt (uiout
, "transferred-bits", "%ld", (data_count
* 8));
1381 ui_out_text (uiout
, " bits in <1 sec");
1383 if (write_count
> 0)
1385 ui_out_text (uiout
, ", ");
1386 ui_out_field_fmt (uiout
, "write-rate", "%ld", data_count
/ write_count
);
1387 ui_out_text (uiout
, " bytes/write");
1389 ui_out_text (uiout
, ".\n");
1391 fprintf_unfiltered (stream
, "Transfer rate: ");
1393 fprintf_unfiltered (stream
, "%ld bits/sec", (data_count
* 8) / time_count
);
1395 fprintf_unfiltered (stream
, "%ld bits in <1 sec", (data_count
* 8));
1396 if (write_count
> 0)
1397 fprintf_unfiltered (stream
, ", %ld bytes/write", data_count
/ write_count
);
1398 fprintf_unfiltered (stream
, ".\n");
1402 /* This function allows the addition of incrementally linked object files.
1403 It does not modify any state in the target, only in the debugger. */
1404 /* Note: ezannoni 2000-04-13 This function/command used to have a
1405 special case syntax for the rombug target (Rombug is the boot
1406 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1407 rombug case, the user doesn't need to supply a text address,
1408 instead a call to target_link() (in target.c) would supply the
1409 value to use. We are now discontinuing this type of ad hoc syntax. */
1413 add_symbol_file_command (char *args
, int from_tty
)
1415 char *filename
= NULL
;
1416 int flags
= OBJF_USERLOADED
;
1418 int expecting_option
= 0;
1419 int section_index
= 0;
1423 int expecting_sec_name
= 0;
1424 int expecting_sec_addr
= 0;
1430 } sect_opts
[SECT_OFF_MAX
];
1432 struct section_addr_info section_addrs
;
1433 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1438 error ("add-symbol-file takes a file name and an address");
1440 /* Make a copy of the string that we can safely write into. */
1441 args
= xstrdup (args
);
1443 /* Ensure section_addrs is initialized */
1444 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1446 while (*args
!= '\000')
1448 /* Any leading spaces? */
1449 while (isspace (*args
))
1452 /* Point arg to the beginning of the argument. */
1455 /* Move args pointer over the argument. */
1456 while ((*args
!= '\000') && !isspace (*args
))
1459 /* If there are more arguments, terminate arg and
1461 if (*args
!= '\000')
1464 /* Now process the argument. */
1467 /* The first argument is the file name. */
1468 filename
= tilde_expand (arg
);
1469 make_cleanup (xfree
, filename
);
1474 /* The second argument is always the text address at which
1475 to load the program. */
1476 sect_opts
[section_index
].name
= ".text";
1477 sect_opts
[section_index
].value
= arg
;
1482 /* It's an option (starting with '-') or it's an argument
1487 if (strcmp (arg
, "-mapped") == 0)
1488 flags
|= OBJF_MAPPED
;
1490 if (strcmp (arg
, "-readnow") == 0)
1491 flags
|= OBJF_READNOW
;
1493 if (strcmp (arg
, "-s") == 0)
1495 if (section_index
>= SECT_OFF_MAX
)
1496 error ("Too many sections specified.");
1497 expecting_sec_name
= 1;
1498 expecting_sec_addr
= 1;
1503 if (expecting_sec_name
)
1505 sect_opts
[section_index
].name
= arg
;
1506 expecting_sec_name
= 0;
1509 if (expecting_sec_addr
)
1511 sect_opts
[section_index
].value
= arg
;
1512 expecting_sec_addr
= 0;
1516 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1522 /* Print the prompt for the query below. And save the arguments into
1523 a sect_addr_info structure to be passed around to other
1524 functions. We have to split this up into separate print
1525 statements because local_hex_string returns a local static
1528 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1529 for (i
= 0; i
< section_index
; i
++)
1532 char *val
= sect_opts
[i
].value
;
1533 char *sec
= sect_opts
[i
].name
;
1535 val
= sect_opts
[i
].value
;
1536 if (val
[0] == '0' && val
[1] == 'x')
1537 addr
= strtoul (val
+2, NULL
, 16);
1539 addr
= strtoul (val
, NULL
, 10);
1541 /* Here we store the section offsets in the order they were
1542 entered on the command line. */
1543 section_addrs
.other
[sec_num
].name
= sec
;
1544 section_addrs
.other
[sec_num
].addr
= addr
;
1545 printf_filtered ("\t%s_addr = %s\n",
1547 local_hex_string ((unsigned long)addr
));
1550 /* The object's sections are initialized when a
1551 call is made to build_objfile_section_table (objfile).
1552 This happens in reread_symbols.
1553 At this point, we don't know what file type this is,
1554 so we can't determine what section names are valid. */
1557 if (from_tty
&& (!query ("%s", "")))
1558 error ("Not confirmed.");
1560 symbol_file_add (filename
, from_tty
, §ion_addrs
, 0, flags
);
1562 /* Getting new symbols may change our opinion about what is
1564 reinit_frame_cache ();
1565 do_cleanups (my_cleanups
);
1569 add_shared_symbol_files_command (char *args
, int from_tty
)
1571 #ifdef ADD_SHARED_SYMBOL_FILES
1572 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1574 error ("This command is not available in this configuration of GDB.");
1578 /* Re-read symbols if a symbol-file has changed. */
1580 reread_symbols (void)
1582 struct objfile
*objfile
;
1585 struct stat new_statbuf
;
1588 /* With the addition of shared libraries, this should be modified,
1589 the load time should be saved in the partial symbol tables, since
1590 different tables may come from different source files. FIXME.
1591 This routine should then walk down each partial symbol table
1592 and see if the symbol table that it originates from has been changed */
1594 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1598 #ifdef IBM6000_TARGET
1599 /* If this object is from a shared library, then you should
1600 stat on the library name, not member name. */
1602 if (objfile
->obfd
->my_archive
)
1603 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1606 res
= stat (objfile
->name
, &new_statbuf
);
1609 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1610 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1614 new_modtime
= new_statbuf
.st_mtime
;
1615 if (new_modtime
!= objfile
->mtime
)
1617 struct cleanup
*old_cleanups
;
1618 struct section_offsets
*offsets
;
1620 char *obfd_filename
;
1622 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1625 /* There are various functions like symbol_file_add,
1626 symfile_bfd_open, syms_from_objfile, etc., which might
1627 appear to do what we want. But they have various other
1628 effects which we *don't* want. So we just do stuff
1629 ourselves. We don't worry about mapped files (for one thing,
1630 any mapped file will be out of date). */
1632 /* If we get an error, blow away this objfile (not sure if
1633 that is the correct response for things like shared
1635 old_cleanups
= make_cleanup_free_objfile (objfile
);
1636 /* We need to do this whenever any symbols go away. */
1637 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1639 /* Clean up any state BFD has sitting around. We don't need
1640 to close the descriptor but BFD lacks a way of closing the
1641 BFD without closing the descriptor. */
1642 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1643 if (!bfd_close (objfile
->obfd
))
1644 error ("Can't close BFD for %s: %s", objfile
->name
,
1645 bfd_errmsg (bfd_get_error ()));
1646 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1647 if (objfile
->obfd
== NULL
)
1648 error ("Can't open %s to read symbols.", objfile
->name
);
1649 /* bfd_openr sets cacheable to true, which is what we want. */
1650 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1651 error ("Can't read symbols from %s: %s.", objfile
->name
,
1652 bfd_errmsg (bfd_get_error ()));
1654 /* Save the offsets, we will nuke them with the rest of the
1656 num_offsets
= objfile
->num_sections
;
1657 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1658 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1660 /* Nuke all the state that we will re-read. Much of the following
1661 code which sets things to NULL really is necessary to tell
1662 other parts of GDB that there is nothing currently there. */
1664 /* FIXME: Do we have to free a whole linked list, or is this
1666 if (objfile
->global_psymbols
.list
)
1667 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1668 memset (&objfile
->global_psymbols
, 0,
1669 sizeof (objfile
->global_psymbols
));
1670 if (objfile
->static_psymbols
.list
)
1671 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1672 memset (&objfile
->static_psymbols
, 0,
1673 sizeof (objfile
->static_psymbols
));
1675 /* Free the obstacks for non-reusable objfiles */
1676 free_bcache (&objfile
->psymbol_cache
);
1677 obstack_free (&objfile
->psymbol_obstack
, 0);
1678 obstack_free (&objfile
->symbol_obstack
, 0);
1679 obstack_free (&objfile
->type_obstack
, 0);
1680 objfile
->sections
= NULL
;
1681 objfile
->symtabs
= NULL
;
1682 objfile
->psymtabs
= NULL
;
1683 objfile
->free_psymtabs
= NULL
;
1684 objfile
->msymbols
= NULL
;
1685 objfile
->minimal_symbol_count
= 0;
1686 memset (&objfile
->msymbol_hash
, 0,
1687 sizeof (objfile
->msymbol_hash
));
1688 memset (&objfile
->msymbol_demangled_hash
, 0,
1689 sizeof (objfile
->msymbol_demangled_hash
));
1690 objfile
->fundamental_types
= NULL
;
1691 if (objfile
->sf
!= NULL
)
1693 (*objfile
->sf
->sym_finish
) (objfile
);
1696 /* We never make this a mapped file. */
1698 /* obstack_specify_allocation also initializes the obstack so
1700 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1702 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1704 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1706 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1708 if (build_objfile_section_table (objfile
))
1710 error ("Can't find the file sections in `%s': %s",
1711 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1714 /* We use the same section offsets as from last time. I'm not
1715 sure whether that is always correct for shared libraries. */
1716 objfile
->section_offsets
= (struct section_offsets
*)
1717 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1718 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1719 objfile
->num_sections
= num_offsets
;
1721 /* What the hell is sym_new_init for, anyway? The concept of
1722 distinguishing between the main file and additional files
1723 in this way seems rather dubious. */
1724 if (objfile
== symfile_objfile
)
1726 (*objfile
->sf
->sym_new_init
) (objfile
);
1728 RESET_HP_UX_GLOBALS ();
1732 (*objfile
->sf
->sym_init
) (objfile
);
1733 clear_complaints (1, 1);
1734 /* The "mainline" parameter is a hideous hack; I think leaving it
1735 zero is OK since dbxread.c also does what it needs to do if
1736 objfile->global_psymbols.size is 0. */
1737 (*objfile
->sf
->sym_read
) (objfile
, 0);
1738 if (!have_partial_symbols () && !have_full_symbols ())
1741 printf_filtered ("(no debugging symbols found)\n");
1744 objfile
->flags
|= OBJF_SYMS
;
1746 /* We're done reading the symbol file; finish off complaints. */
1747 clear_complaints (0, 1);
1749 /* Getting new symbols may change our opinion about what is
1752 reinit_frame_cache ();
1754 /* Discard cleanups as symbol reading was successful. */
1755 discard_cleanups (old_cleanups
);
1757 /* If the mtime has changed between the time we set new_modtime
1758 and now, we *want* this to be out of date, so don't call stat
1760 objfile
->mtime
= new_modtime
;
1763 /* Call this after reading in a new symbol table to give target
1764 dependent code a crack at the new symbols. For instance, this
1765 could be used to update the values of target-specific symbols GDB
1766 needs to keep track of (such as _sigtramp, or whatever). */
1768 TARGET_SYMFILE_POSTREAD (objfile
);
1774 clear_symtab_users ();
1786 static filename_language
*filename_language_table
;
1787 static int fl_table_size
, fl_table_next
;
1790 add_filename_language (char *ext
, enum language lang
)
1792 if (fl_table_next
>= fl_table_size
)
1794 fl_table_size
+= 10;
1795 filename_language_table
= xrealloc (filename_language_table
,
1799 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
1800 filename_language_table
[fl_table_next
].lang
= lang
;
1804 static char *ext_args
;
1807 set_ext_lang_command (char *args
, int from_tty
)
1810 char *cp
= ext_args
;
1813 /* First arg is filename extension, starting with '.' */
1815 error ("'%s': Filename extension must begin with '.'", ext_args
);
1817 /* Find end of first arg. */
1818 while (*cp
&& !isspace (*cp
))
1822 error ("'%s': two arguments required -- filename extension and language",
1825 /* Null-terminate first arg */
1828 /* Find beginning of second arg, which should be a source language. */
1829 while (*cp
&& isspace (*cp
))
1833 error ("'%s': two arguments required -- filename extension and language",
1836 /* Lookup the language from among those we know. */
1837 lang
= language_enum (cp
);
1839 /* Now lookup the filename extension: do we already know it? */
1840 for (i
= 0; i
< fl_table_next
; i
++)
1841 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1844 if (i
>= fl_table_next
)
1846 /* new file extension */
1847 add_filename_language (ext_args
, lang
);
1851 /* redefining a previously known filename extension */
1854 /* query ("Really make files of type %s '%s'?", */
1855 /* ext_args, language_str (lang)); */
1857 xfree (filename_language_table
[i
].ext
);
1858 filename_language_table
[i
].ext
= xstrdup (ext_args
);
1859 filename_language_table
[i
].lang
= lang
;
1864 info_ext_lang_command (char *args
, int from_tty
)
1868 printf_filtered ("Filename extensions and the languages they represent:");
1869 printf_filtered ("\n\n");
1870 for (i
= 0; i
< fl_table_next
; i
++)
1871 printf_filtered ("\t%s\t- %s\n",
1872 filename_language_table
[i
].ext
,
1873 language_str (filename_language_table
[i
].lang
));
1877 init_filename_language_table (void)
1879 if (fl_table_size
== 0) /* protect against repetition */
1883 filename_language_table
=
1884 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1885 add_filename_language (".c", language_c
);
1886 add_filename_language (".C", language_cplus
);
1887 add_filename_language (".cc", language_cplus
);
1888 add_filename_language (".cp", language_cplus
);
1889 add_filename_language (".cpp", language_cplus
);
1890 add_filename_language (".cxx", language_cplus
);
1891 add_filename_language (".c++", language_cplus
);
1892 add_filename_language (".java", language_java
);
1893 add_filename_language (".class", language_java
);
1894 add_filename_language (".ch", language_chill
);
1895 add_filename_language (".c186", language_chill
);
1896 add_filename_language (".c286", language_chill
);
1897 add_filename_language (".f", language_fortran
);
1898 add_filename_language (".F", language_fortran
);
1899 add_filename_language (".s", language_asm
);
1900 add_filename_language (".S", language_asm
);
1901 add_filename_language (".pas", language_pascal
);
1902 add_filename_language (".p", language_pascal
);
1903 add_filename_language (".pp", language_pascal
);
1908 deduce_language_from_filename (char *filename
)
1913 if (filename
!= NULL
)
1914 if ((cp
= strrchr (filename
, '.')) != NULL
)
1915 for (i
= 0; i
< fl_table_next
; i
++)
1916 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1917 return filename_language_table
[i
].lang
;
1919 return language_unknown
;
1924 Allocate and partly initialize a new symbol table. Return a pointer
1925 to it. error() if no space.
1927 Caller must set these fields:
1933 possibly free_named_symtabs (symtab->filename);
1937 allocate_symtab (char *filename
, struct objfile
*objfile
)
1939 register struct symtab
*symtab
;
1941 symtab
= (struct symtab
*)
1942 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
1943 memset (symtab
, 0, sizeof (*symtab
));
1944 symtab
->filename
= obsavestring (filename
, strlen (filename
),
1945 &objfile
->symbol_obstack
);
1946 symtab
->fullname
= NULL
;
1947 symtab
->language
= deduce_language_from_filename (filename
);
1948 symtab
->debugformat
= obsavestring ("unknown", 7,
1949 &objfile
->symbol_obstack
);
1951 /* Hook it to the objfile it comes from */
1953 symtab
->objfile
= objfile
;
1954 symtab
->next
= objfile
->symtabs
;
1955 objfile
->symtabs
= symtab
;
1957 /* FIXME: This should go away. It is only defined for the Z8000,
1958 and the Z8000 definition of this macro doesn't have anything to
1959 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1960 here for convenience. */
1961 #ifdef INIT_EXTRA_SYMTAB_INFO
1962 INIT_EXTRA_SYMTAB_INFO (symtab
);
1968 struct partial_symtab
*
1969 allocate_psymtab (char *filename
, struct objfile
*objfile
)
1971 struct partial_symtab
*psymtab
;
1973 if (objfile
->free_psymtabs
)
1975 psymtab
= objfile
->free_psymtabs
;
1976 objfile
->free_psymtabs
= psymtab
->next
;
1979 psymtab
= (struct partial_symtab
*)
1980 obstack_alloc (&objfile
->psymbol_obstack
,
1981 sizeof (struct partial_symtab
));
1983 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1984 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
1985 &objfile
->psymbol_obstack
);
1986 psymtab
->symtab
= NULL
;
1988 /* Prepend it to the psymtab list for the objfile it belongs to.
1989 Psymtabs are searched in most recent inserted -> least recent
1992 psymtab
->objfile
= objfile
;
1993 psymtab
->next
= objfile
->psymtabs
;
1994 objfile
->psymtabs
= psymtab
;
1997 struct partial_symtab
**prev_pst
;
1998 psymtab
->objfile
= objfile
;
1999 psymtab
->next
= NULL
;
2000 prev_pst
= &(objfile
->psymtabs
);
2001 while ((*prev_pst
) != NULL
)
2002 prev_pst
= &((*prev_pst
)->next
);
2003 (*prev_pst
) = psymtab
;
2011 discard_psymtab (struct partial_symtab
*pst
)
2013 struct partial_symtab
**prev_pst
;
2016 Empty psymtabs happen as a result of header files which don't
2017 have any symbols in them. There can be a lot of them. But this
2018 check is wrong, in that a psymtab with N_SLINE entries but
2019 nothing else is not empty, but we don't realize that. Fixing
2020 that without slowing things down might be tricky. */
2022 /* First, snip it out of the psymtab chain */
2024 prev_pst
= &(pst
->objfile
->psymtabs
);
2025 while ((*prev_pst
) != pst
)
2026 prev_pst
= &((*prev_pst
)->next
);
2027 (*prev_pst
) = pst
->next
;
2029 /* Next, put it on a free list for recycling */
2031 pst
->next
= pst
->objfile
->free_psymtabs
;
2032 pst
->objfile
->free_psymtabs
= pst
;
2036 /* Reset all data structures in gdb which may contain references to symbol
2040 clear_symtab_users (void)
2042 /* Someday, we should do better than this, by only blowing away
2043 the things that really need to be blown. */
2044 clear_value_history ();
2046 clear_internalvars ();
2047 breakpoint_re_set ();
2048 set_default_breakpoint (0, 0, 0, 0);
2049 current_source_symtab
= 0;
2050 current_source_line
= 0;
2051 clear_pc_function_cache ();
2052 if (target_new_objfile_hook
)
2053 target_new_objfile_hook (NULL
);
2057 clear_symtab_users_cleanup (void *ignore
)
2059 clear_symtab_users ();
2062 /* clear_symtab_users_once:
2064 This function is run after symbol reading, or from a cleanup.
2065 If an old symbol table was obsoleted, the old symbol table
2066 has been blown away, but the other GDB data structures that may
2067 reference it have not yet been cleared or re-directed. (The old
2068 symtab was zapped, and the cleanup queued, in free_named_symtab()
2071 This function can be queued N times as a cleanup, or called
2072 directly; it will do all the work the first time, and then will be a
2073 no-op until the next time it is queued. This works by bumping a
2074 counter at queueing time. Much later when the cleanup is run, or at
2075 the end of symbol processing (in case the cleanup is discarded), if
2076 the queued count is greater than the "done-count", we do the work
2077 and set the done-count to the queued count. If the queued count is
2078 less than or equal to the done-count, we just ignore the call. This
2079 is needed because reading a single .o file will often replace many
2080 symtabs (one per .h file, for example), and we don't want to reset
2081 the breakpoints N times in the user's face.
2083 The reason we both queue a cleanup, and call it directly after symbol
2084 reading, is because the cleanup protects us in case of errors, but is
2085 discarded if symbol reading is successful. */
2088 /* FIXME: As free_named_symtabs is currently a big noop this function
2089 is no longer needed. */
2090 static void clear_symtab_users_once (void);
2092 static int clear_symtab_users_queued
;
2093 static int clear_symtab_users_done
;
2096 clear_symtab_users_once (void)
2098 /* Enforce once-per-`do_cleanups'-semantics */
2099 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2101 clear_symtab_users_done
= clear_symtab_users_queued
;
2103 clear_symtab_users ();
2107 /* Delete the specified psymtab, and any others that reference it. */
2110 cashier_psymtab (struct partial_symtab
*pst
)
2112 struct partial_symtab
*ps
, *pprev
= NULL
;
2115 /* Find its previous psymtab in the chain */
2116 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2125 /* Unhook it from the chain. */
2126 if (ps
== pst
->objfile
->psymtabs
)
2127 pst
->objfile
->psymtabs
= ps
->next
;
2129 pprev
->next
= ps
->next
;
2131 /* FIXME, we can't conveniently deallocate the entries in the
2132 partial_symbol lists (global_psymbols/static_psymbols) that
2133 this psymtab points to. These just take up space until all
2134 the psymtabs are reclaimed. Ditto the dependencies list and
2135 filename, which are all in the psymbol_obstack. */
2137 /* We need to cashier any psymtab that has this one as a dependency... */
2139 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2141 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2143 if (ps
->dependencies
[i
] == pst
)
2145 cashier_psymtab (ps
);
2146 goto again
; /* Must restart, chain has been munged. */
2153 /* If a symtab or psymtab for filename NAME is found, free it along
2154 with any dependent breakpoints, displays, etc.
2155 Used when loading new versions of object modules with the "add-file"
2156 command. This is only called on the top-level symtab or psymtab's name;
2157 it is not called for subsidiary files such as .h files.
2159 Return value is 1 if we blew away the environment, 0 if not.
2160 FIXME. The return value appears to never be used.
2162 FIXME. I think this is not the best way to do this. We should
2163 work on being gentler to the environment while still cleaning up
2164 all stray pointers into the freed symtab. */
2167 free_named_symtabs (char *name
)
2170 /* FIXME: With the new method of each objfile having it's own
2171 psymtab list, this function needs serious rethinking. In particular,
2172 why was it ever necessary to toss psymtabs with specific compilation
2173 unit filenames, as opposed to all psymtabs from a particular symbol
2175 Well, the answer is that some systems permit reloading of particular
2176 compilation units. We want to blow away any old info about these
2177 compilation units, regardless of which objfiles they arrived in. --gnu. */
2179 register struct symtab
*s
;
2180 register struct symtab
*prev
;
2181 register struct partial_symtab
*ps
;
2182 struct blockvector
*bv
;
2185 /* We only wack things if the symbol-reload switch is set. */
2186 if (!symbol_reloading
)
2189 /* Some symbol formats have trouble providing file names... */
2190 if (name
== 0 || *name
== '\0')
2193 /* Look for a psymtab with the specified name. */
2196 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2198 if (STREQ (name
, ps
->filename
))
2200 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2201 goto again2
; /* Must restart, chain has been munged */
2205 /* Look for a symtab with the specified name. */
2207 for (s
= symtab_list
; s
; s
= s
->next
)
2209 if (STREQ (name
, s
->filename
))
2216 if (s
== symtab_list
)
2217 symtab_list
= s
->next
;
2219 prev
->next
= s
->next
;
2221 /* For now, queue a delete for all breakpoints, displays, etc., whether
2222 or not they depend on the symtab being freed. This should be
2223 changed so that only those data structures affected are deleted. */
2225 /* But don't delete anything if the symtab is empty.
2226 This test is necessary due to a bug in "dbxread.c" that
2227 causes empty symtabs to be created for N_SO symbols that
2228 contain the pathname of the object file. (This problem
2229 has been fixed in GDB 3.9x). */
2231 bv
= BLOCKVECTOR (s
);
2232 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2233 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2234 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2236 complain (&oldsyms_complaint
, name
);
2238 clear_symtab_users_queued
++;
2239 make_cleanup (clear_symtab_users_once
, 0);
2244 complain (&empty_symtab_complaint
, name
);
2251 /* It is still possible that some breakpoints will be affected
2252 even though no symtab was found, since the file might have
2253 been compiled without debugging, and hence not be associated
2254 with a symtab. In order to handle this correctly, we would need
2255 to keep a list of text address ranges for undebuggable files.
2256 For now, we do nothing, since this is a fairly obscure case. */
2260 /* FIXME, what about the minimal symbol table? */
2267 /* Allocate and partially fill a partial symtab. It will be
2268 completely filled at the end of the symbol list.
2270 FILENAME is the name of the symbol-file we are reading from. */
2272 struct partial_symtab
*
2273 start_psymtab_common (struct objfile
*objfile
,
2274 struct section_offsets
*section_offsets
, char *filename
,
2275 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2276 struct partial_symbol
**static_syms
)
2278 struct partial_symtab
*psymtab
;
2280 psymtab
= allocate_psymtab (filename
, objfile
);
2281 psymtab
->section_offsets
= section_offsets
;
2282 psymtab
->textlow
= textlow
;
2283 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2284 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2285 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2289 /* Add a symbol with a long value to a psymtab.
2290 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2293 add_psymbol_to_list (char *name
, int namelength
, namespace_enum
namespace,
2294 enum address_class
class,
2295 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2296 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2297 enum language language
, struct objfile
*objfile
)
2299 register struct partial_symbol
*psym
;
2300 char *buf
= alloca (namelength
+ 1);
2301 /* psymbol is static so that there will be no uninitialized gaps in the
2302 structure which might contain random data, causing cache misses in
2304 static struct partial_symbol psymbol
;
2306 /* Create local copy of the partial symbol */
2307 memcpy (buf
, name
, namelength
);
2308 buf
[namelength
] = '\0';
2309 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2310 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2313 SYMBOL_VALUE (&psymbol
) = val
;
2317 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2319 SYMBOL_SECTION (&psymbol
) = 0;
2320 SYMBOL_LANGUAGE (&psymbol
) = language
;
2321 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2322 PSYMBOL_CLASS (&psymbol
) = class;
2323 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2325 /* Stash the partial symbol away in the cache */
2326 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2328 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2329 if (list
->next
>= list
->list
+ list
->size
)
2331 extend_psymbol_list (list
, objfile
);
2333 *list
->next
++ = psym
;
2334 OBJSTAT (objfile
, n_psyms
++);
2337 /* Add a symbol with a long value to a psymtab. This differs from
2338 * add_psymbol_to_list above in taking both a mangled and a demangled
2342 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2343 int dem_namelength
, namespace_enum
namespace,
2344 enum address_class
class,
2345 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2346 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2347 enum language language
,
2348 struct objfile
*objfile
)
2350 register struct partial_symbol
*psym
;
2351 char *buf
= alloca (namelength
+ 1);
2352 /* psymbol is static so that there will be no uninitialized gaps in the
2353 structure which might contain random data, causing cache misses in
2355 static struct partial_symbol psymbol
;
2357 /* Create local copy of the partial symbol */
2359 memcpy (buf
, name
, namelength
);
2360 buf
[namelength
] = '\0';
2361 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2363 buf
= alloca (dem_namelength
+ 1);
2364 memcpy (buf
, dem_name
, dem_namelength
);
2365 buf
[dem_namelength
] = '\0';
2370 case language_cplus
:
2371 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2372 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2374 case language_chill
:
2375 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2376 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2378 /* FIXME What should be done for the default case? Ignoring for now. */
2381 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2384 SYMBOL_VALUE (&psymbol
) = val
;
2388 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2390 SYMBOL_SECTION (&psymbol
) = 0;
2391 SYMBOL_LANGUAGE (&psymbol
) = language
;
2392 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2393 PSYMBOL_CLASS (&psymbol
) = class;
2394 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2396 /* Stash the partial symbol away in the cache */
2397 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2399 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2400 if (list
->next
>= list
->list
+ list
->size
)
2402 extend_psymbol_list (list
, objfile
);
2404 *list
->next
++ = psym
;
2405 OBJSTAT (objfile
, n_psyms
++);
2408 /* Initialize storage for partial symbols. */
2411 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2413 /* Free any previously allocated psymbol lists. */
2415 if (objfile
->global_psymbols
.list
)
2417 mfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2419 if (objfile
->static_psymbols
.list
)
2421 mfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2424 /* Current best guess is that approximately a twentieth
2425 of the total symbols (in a debugging file) are global or static
2428 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2429 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2431 if (objfile
->global_psymbols
.size
> 0)
2433 objfile
->global_psymbols
.next
=
2434 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2435 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2436 * sizeof (struct partial_symbol
*)));
2438 if (objfile
->static_psymbols
.size
> 0)
2440 objfile
->static_psymbols
.next
=
2441 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2442 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2443 * sizeof (struct partial_symbol
*)));
2448 The following code implements an abstraction for debugging overlay sections.
2450 The target model is as follows:
2451 1) The gnu linker will permit multiple sections to be mapped into the
2452 same VMA, each with its own unique LMA (or load address).
2453 2) It is assumed that some runtime mechanism exists for mapping the
2454 sections, one by one, from the load address into the VMA address.
2455 3) This code provides a mechanism for gdb to keep track of which
2456 sections should be considered to be mapped from the VMA to the LMA.
2457 This information is used for symbol lookup, and memory read/write.
2458 For instance, if a section has been mapped then its contents
2459 should be read from the VMA, otherwise from the LMA.
2461 Two levels of debugger support for overlays are available. One is
2462 "manual", in which the debugger relies on the user to tell it which
2463 overlays are currently mapped. This level of support is
2464 implemented entirely in the core debugger, and the information about
2465 whether a section is mapped is kept in the objfile->obj_section table.
2467 The second level of support is "automatic", and is only available if
2468 the target-specific code provides functionality to read the target's
2469 overlay mapping table, and translate its contents for the debugger
2470 (by updating the mapped state information in the obj_section tables).
2472 The interface is as follows:
2474 overlay map <name> -- tell gdb to consider this section mapped
2475 overlay unmap <name> -- tell gdb to consider this section unmapped
2476 overlay list -- list the sections that GDB thinks are mapped
2477 overlay read-target -- get the target's state of what's mapped
2478 overlay off/manual/auto -- set overlay debugging state
2479 Functional interface:
2480 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2481 section, return that section.
2482 find_pc_overlay(pc): find any overlay section that contains
2483 the pc, either in its VMA or its LMA
2484 overlay_is_mapped(sect): true if overlay is marked as mapped
2485 section_is_overlay(sect): true if section's VMA != LMA
2486 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2487 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2488 overlay_mapped_address(...): map an address from section's LMA to VMA
2489 overlay_unmapped_address(...): map an address from section's VMA to LMA
2490 symbol_overlayed_address(...): Return a "current" address for symbol:
2491 either in VMA or LMA depending on whether
2492 the symbol's section is currently mapped
2495 /* Overlay debugging state: */
2497 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2498 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2500 /* Target vector for refreshing overlay mapped state */
2501 static void simple_overlay_update (struct obj_section
*);
2502 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2504 /* Function: section_is_overlay (SECTION)
2505 Returns true if SECTION has VMA not equal to LMA, ie.
2506 SECTION is loaded at an address different from where it will "run". */
2509 section_is_overlay (asection
*section
)
2511 if (overlay_debugging
)
2512 if (section
&& section
->lma
!= 0 &&
2513 section
->vma
!= section
->lma
)
2519 /* Function: overlay_invalidate_all (void)
2520 Invalidate the mapped state of all overlay sections (mark it as stale). */
2523 overlay_invalidate_all (void)
2525 struct objfile
*objfile
;
2526 struct obj_section
*sect
;
2528 ALL_OBJSECTIONS (objfile
, sect
)
2529 if (section_is_overlay (sect
->the_bfd_section
))
2530 sect
->ovly_mapped
= -1;
2533 /* Function: overlay_is_mapped (SECTION)
2534 Returns true if section is an overlay, and is currently mapped.
2535 Private: public access is thru function section_is_mapped.
2537 Access to the ovly_mapped flag is restricted to this function, so
2538 that we can do automatic update. If the global flag
2539 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2540 overlay_invalidate_all. If the mapped state of the particular
2541 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2544 overlay_is_mapped (struct obj_section
*osect
)
2546 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2549 switch (overlay_debugging
)
2553 return 0; /* overlay debugging off */
2554 case -1: /* overlay debugging automatic */
2555 /* Unles there is a target_overlay_update function,
2556 there's really nothing useful to do here (can't really go auto) */
2557 if (target_overlay_update
)
2559 if (overlay_cache_invalid
)
2561 overlay_invalidate_all ();
2562 overlay_cache_invalid
= 0;
2564 if (osect
->ovly_mapped
== -1)
2565 (*target_overlay_update
) (osect
);
2567 /* fall thru to manual case */
2568 case 1: /* overlay debugging manual */
2569 return osect
->ovly_mapped
== 1;
2573 /* Function: section_is_mapped
2574 Returns true if section is an overlay, and is currently mapped. */
2577 section_is_mapped (asection
*section
)
2579 struct objfile
*objfile
;
2580 struct obj_section
*osect
;
2582 if (overlay_debugging
)
2583 if (section
&& section_is_overlay (section
))
2584 ALL_OBJSECTIONS (objfile
, osect
)
2585 if (osect
->the_bfd_section
== section
)
2586 return overlay_is_mapped (osect
);
2591 /* Function: pc_in_unmapped_range
2592 If PC falls into the lma range of SECTION, return true, else false. */
2595 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2599 if (overlay_debugging
)
2600 if (section
&& section_is_overlay (section
))
2602 size
= bfd_get_section_size_before_reloc (section
);
2603 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2609 /* Function: pc_in_mapped_range
2610 If PC falls into the vma range of SECTION, return true, else false. */
2613 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2617 if (overlay_debugging
)
2618 if (section
&& section_is_overlay (section
))
2620 size
= bfd_get_section_size_before_reloc (section
);
2621 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2627 /* Function: overlay_unmapped_address (PC, SECTION)
2628 Returns the address corresponding to PC in the unmapped (load) range.
2629 May be the same as PC. */
2632 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2634 if (overlay_debugging
)
2635 if (section
&& section_is_overlay (section
) &&
2636 pc_in_mapped_range (pc
, section
))
2637 return pc
+ section
->lma
- section
->vma
;
2642 /* Function: overlay_mapped_address (PC, SECTION)
2643 Returns the address corresponding to PC in the mapped (runtime) range.
2644 May be the same as PC. */
2647 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2649 if (overlay_debugging
)
2650 if (section
&& section_is_overlay (section
) &&
2651 pc_in_unmapped_range (pc
, section
))
2652 return pc
+ section
->vma
- section
->lma
;
2658 /* Function: symbol_overlayed_address
2659 Return one of two addresses (relative to the VMA or to the LMA),
2660 depending on whether the section is mapped or not. */
2663 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2665 if (overlay_debugging
)
2667 /* If the symbol has no section, just return its regular address. */
2670 /* If the symbol's section is not an overlay, just return its address */
2671 if (!section_is_overlay (section
))
2673 /* If the symbol's section is mapped, just return its address */
2674 if (section_is_mapped (section
))
2677 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2678 * then return its LOADED address rather than its vma address!!
2680 return overlay_unmapped_address (address
, section
);
2685 /* Function: find_pc_overlay (PC)
2686 Return the best-match overlay section for PC:
2687 If PC matches a mapped overlay section's VMA, return that section.
2688 Else if PC matches an unmapped section's VMA, return that section.
2689 Else if PC matches an unmapped section's LMA, return that section. */
2692 find_pc_overlay (CORE_ADDR pc
)
2694 struct objfile
*objfile
;
2695 struct obj_section
*osect
, *best_match
= NULL
;
2697 if (overlay_debugging
)
2698 ALL_OBJSECTIONS (objfile
, osect
)
2699 if (section_is_overlay (osect
->the_bfd_section
))
2701 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2703 if (overlay_is_mapped (osect
))
2704 return osect
->the_bfd_section
;
2708 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2711 return best_match
? best_match
->the_bfd_section
: NULL
;
2714 /* Function: find_pc_mapped_section (PC)
2715 If PC falls into the VMA address range of an overlay section that is
2716 currently marked as MAPPED, return that section. Else return NULL. */
2719 find_pc_mapped_section (CORE_ADDR pc
)
2721 struct objfile
*objfile
;
2722 struct obj_section
*osect
;
2724 if (overlay_debugging
)
2725 ALL_OBJSECTIONS (objfile
, osect
)
2726 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2727 overlay_is_mapped (osect
))
2728 return osect
->the_bfd_section
;
2733 /* Function: list_overlays_command
2734 Print a list of mapped sections and their PC ranges */
2737 list_overlays_command (char *args
, int from_tty
)
2740 struct objfile
*objfile
;
2741 struct obj_section
*osect
;
2743 if (overlay_debugging
)
2744 ALL_OBJSECTIONS (objfile
, osect
)
2745 if (overlay_is_mapped (osect
))
2751 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2752 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2753 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2754 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2756 printf_filtered ("Section %s, loaded at ", name
);
2757 print_address_numeric (lma
, 1, gdb_stdout
);
2758 puts_filtered (" - ");
2759 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2760 printf_filtered (", mapped at ");
2761 print_address_numeric (vma
, 1, gdb_stdout
);
2762 puts_filtered (" - ");
2763 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2764 puts_filtered ("\n");
2769 printf_filtered ("No sections are mapped.\n");
2772 /* Function: map_overlay_command
2773 Mark the named section as mapped (ie. residing at its VMA address). */
2776 map_overlay_command (char *args
, int from_tty
)
2778 struct objfile
*objfile
, *objfile2
;
2779 struct obj_section
*sec
, *sec2
;
2782 if (!overlay_debugging
)
2784 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2785 the 'overlay manual' command.");
2787 if (args
== 0 || *args
== 0)
2788 error ("Argument required: name of an overlay section");
2790 /* First, find a section matching the user supplied argument */
2791 ALL_OBJSECTIONS (objfile
, sec
)
2792 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2794 /* Now, check to see if the section is an overlay. */
2795 bfdsec
= sec
->the_bfd_section
;
2796 if (!section_is_overlay (bfdsec
))
2797 continue; /* not an overlay section */
2799 /* Mark the overlay as "mapped" */
2800 sec
->ovly_mapped
= 1;
2802 /* Next, make a pass and unmap any sections that are
2803 overlapped by this new section: */
2804 ALL_OBJSECTIONS (objfile2
, sec2
)
2805 if (sec2
->ovly_mapped
&&
2807 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2808 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2809 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2812 printf_filtered ("Note: section %s unmapped by overlap\n",
2813 bfd_section_name (objfile
->obfd
,
2814 sec2
->the_bfd_section
));
2815 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2819 error ("No overlay section called %s", args
);
2822 /* Function: unmap_overlay_command
2823 Mark the overlay section as unmapped
2824 (ie. resident in its LMA address range, rather than the VMA range). */
2827 unmap_overlay_command (char *args
, int from_tty
)
2829 struct objfile
*objfile
;
2830 struct obj_section
*sec
;
2832 if (!overlay_debugging
)
2834 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2835 the 'overlay manual' command.");
2837 if (args
== 0 || *args
== 0)
2838 error ("Argument required: name of an overlay section");
2840 /* First, find a section matching the user supplied argument */
2841 ALL_OBJSECTIONS (objfile
, sec
)
2842 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2844 if (!sec
->ovly_mapped
)
2845 error ("Section %s is not mapped", args
);
2846 sec
->ovly_mapped
= 0;
2849 error ("No overlay section called %s", args
);
2852 /* Function: overlay_auto_command
2853 A utility command to turn on overlay debugging.
2854 Possibly this should be done via a set/show command. */
2857 overlay_auto_command (char *args
, int from_tty
)
2859 overlay_debugging
= -1;
2861 printf_filtered ("Automatic overlay debugging enabled.");
2864 /* Function: overlay_manual_command
2865 A utility command to turn on overlay debugging.
2866 Possibly this should be done via a set/show command. */
2869 overlay_manual_command (char *args
, int from_tty
)
2871 overlay_debugging
= 1;
2873 printf_filtered ("Overlay debugging enabled.");
2876 /* Function: overlay_off_command
2877 A utility command to turn on overlay debugging.
2878 Possibly this should be done via a set/show command. */
2881 overlay_off_command (char *args
, int from_tty
)
2883 overlay_debugging
= 0;
2885 printf_filtered ("Overlay debugging disabled.");
2889 overlay_load_command (char *args
, int from_tty
)
2891 if (target_overlay_update
)
2892 (*target_overlay_update
) (NULL
);
2894 error ("This target does not know how to read its overlay state.");
2897 /* Function: overlay_command
2898 A place-holder for a mis-typed command */
2900 /* Command list chain containing all defined "overlay" subcommands. */
2901 struct cmd_list_element
*overlaylist
;
2904 overlay_command (char *args
, int from_tty
)
2907 ("\"overlay\" must be followed by the name of an overlay command.\n");
2908 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2912 /* Target Overlays for the "Simplest" overlay manager:
2914 This is GDB's default target overlay layer. It works with the
2915 minimal overlay manager supplied as an example by Cygnus. The
2916 entry point is via a function pointer "target_overlay_update",
2917 so targets that use a different runtime overlay manager can
2918 substitute their own overlay_update function and take over the
2921 The overlay_update function pokes around in the target's data structures
2922 to see what overlays are mapped, and updates GDB's overlay mapping with
2925 In this simple implementation, the target data structures are as follows:
2926 unsigned _novlys; /# number of overlay sections #/
2927 unsigned _ovly_table[_novlys][4] = {
2928 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2929 {..., ..., ..., ...},
2931 unsigned _novly_regions; /# number of overlay regions #/
2932 unsigned _ovly_region_table[_novly_regions][3] = {
2933 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2936 These functions will attempt to update GDB's mappedness state in the
2937 symbol section table, based on the target's mappedness state.
2939 To do this, we keep a cached copy of the target's _ovly_table, and
2940 attempt to detect when the cached copy is invalidated. The main
2941 entry point is "simple_overlay_update(SECT), which looks up SECT in
2942 the cached table and re-reads only the entry for that section from
2943 the target (whenever possible).
2946 /* Cached, dynamically allocated copies of the target data structures: */
2947 static unsigned (*cache_ovly_table
)[4] = 0;
2949 static unsigned (*cache_ovly_region_table
)[3] = 0;
2951 static unsigned cache_novlys
= 0;
2953 static unsigned cache_novly_regions
= 0;
2955 static CORE_ADDR cache_ovly_table_base
= 0;
2957 static CORE_ADDR cache_ovly_region_table_base
= 0;
2961 VMA
, SIZE
, LMA
, MAPPED
2963 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2965 /* Throw away the cached copy of _ovly_table */
2967 simple_free_overlay_table (void)
2969 if (cache_ovly_table
)
2970 xfree (cache_ovly_table
);
2972 cache_ovly_table
= NULL
;
2973 cache_ovly_table_base
= 0;
2977 /* Throw away the cached copy of _ovly_region_table */
2979 simple_free_overlay_region_table (void)
2981 if (cache_ovly_region_table
)
2982 xfree (cache_ovly_region_table
);
2983 cache_novly_regions
= 0;
2984 cache_ovly_region_table
= NULL
;
2985 cache_ovly_region_table_base
= 0;
2989 /* Read an array of ints from the target into a local buffer.
2990 Convert to host order. int LEN is number of ints */
2992 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
2994 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
2997 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
2998 for (i
= 0; i
< len
; i
++)
2999 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3003 /* Find and grab a copy of the target _ovly_table
3004 (and _novlys, which is needed for the table's size) */
3006 simple_read_overlay_table (void)
3008 struct minimal_symbol
*msym
;
3010 simple_free_overlay_table ();
3011 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
3013 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3015 return 0; /* failure */
3016 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3017 if (cache_ovly_table
!= NULL
)
3019 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
3022 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3023 read_target_long_array (cache_ovly_table_base
,
3024 (int *) cache_ovly_table
,
3028 return 0; /* failure */
3031 return 0; /* failure */
3032 return 1; /* SUCCESS */
3036 /* Find and grab a copy of the target _ovly_region_table
3037 (and _novly_regions, which is needed for the table's size) */
3039 simple_read_overlay_region_table (void)
3041 struct minimal_symbol
*msym
;
3043 simple_free_overlay_region_table ();
3044 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
3046 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3048 return 0; /* failure */
3049 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3050 if (cache_ovly_region_table
!= NULL
)
3052 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3055 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3056 read_target_long_array (cache_ovly_region_table_base
,
3057 (int *) cache_ovly_region_table
,
3058 cache_novly_regions
* 3);
3061 return 0; /* failure */
3064 return 0; /* failure */
3065 return 1; /* SUCCESS */
3069 /* Function: simple_overlay_update_1
3070 A helper function for simple_overlay_update. Assuming a cached copy
3071 of _ovly_table exists, look through it to find an entry whose vma,
3072 lma and size match those of OSECT. Re-read the entry and make sure
3073 it still matches OSECT (else the table may no longer be valid).
3074 Set OSECT's mapped state to match the entry. Return: 1 for
3075 success, 0 for failure. */
3078 simple_overlay_update_1 (struct obj_section
*osect
)
3082 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3083 for (i
= 0; i
< cache_novlys
; i
++)
3084 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3085 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3086 cache_ovly_table[i][SIZE] == size */ )
3088 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3089 (int *) cache_ovly_table
[i
], 4);
3090 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3091 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3092 cache_ovly_table[i][SIZE] == size */ )
3094 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3097 else /* Warning! Warning! Target's ovly table has changed! */
3103 /* Function: simple_overlay_update
3104 If OSECT is NULL, then update all sections' mapped state
3105 (after re-reading the entire target _ovly_table).
3106 If OSECT is non-NULL, then try to find a matching entry in the
3107 cached ovly_table and update only OSECT's mapped state.
3108 If a cached entry can't be found or the cache isn't valid, then
3109 re-read the entire cache, and go ahead and update all sections. */
3112 simple_overlay_update (struct obj_section
*osect
)
3114 struct objfile
*objfile
;
3116 /* Were we given an osect to look up? NULL means do all of them. */
3118 /* Have we got a cached copy of the target's overlay table? */
3119 if (cache_ovly_table
!= NULL
)
3120 /* Does its cached location match what's currently in the symtab? */
3121 if (cache_ovly_table_base
==
3122 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3123 /* Then go ahead and try to look up this single section in the cache */
3124 if (simple_overlay_update_1 (osect
))
3125 /* Found it! We're done. */
3128 /* Cached table no good: need to read the entire table anew.
3129 Or else we want all the sections, in which case it's actually
3130 more efficient to read the whole table in one block anyway. */
3132 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3134 warning ("Failed to read the target overlay mapping table.");
3137 /* Now may as well update all sections, even if only one was requested. */
3138 ALL_OBJSECTIONS (objfile
, osect
)
3139 if (section_is_overlay (osect
->the_bfd_section
))
3143 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3144 for (i
= 0; i
< cache_novlys
; i
++)
3145 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3146 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3147 cache_ovly_table[i][SIZE] == size */ )
3148 { /* obj_section matches i'th entry in ovly_table */
3149 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3150 break; /* finished with inner for loop: break out */
3157 _initialize_symfile (void)
3159 struct cmd_list_element
*c
;
3161 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3162 "Load symbol table from executable file FILE.\n\
3163 The `file' command can also load symbol tables, as well as setting the file\n\
3164 to execute.", &cmdlist
);
3165 c
->completer
= filename_completer
;
3167 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3168 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3169 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3170 ADDR is the starting address of the file's text.\n\
3171 The optional arguments are section-name section-address pairs and\n\
3172 should be specified if the data and bss segments are not contiguous\n\
3173 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3175 c
->completer
= filename_completer
;
3177 c
= add_cmd ("add-shared-symbol-files", class_files
,
3178 add_shared_symbol_files_command
,
3179 "Load the symbols from shared objects in the dynamic linker's link map.",
3181 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3184 c
= add_cmd ("load", class_files
, load_command
,
3185 "Dynamically load FILE into the running program, and record its symbols\n\
3186 for access from GDB.", &cmdlist
);
3187 c
->completer
= filename_completer
;
3190 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3191 (char *) &symbol_reloading
,
3192 "Set dynamic symbol table reloading multiple times in one run.",
3196 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3197 "Commands for debugging overlays.", &overlaylist
,
3198 "overlay ", 0, &cmdlist
);
3200 add_com_alias ("ovly", "overlay", class_alias
, 1);
3201 add_com_alias ("ov", "overlay", class_alias
, 1);
3203 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3204 "Assert that an overlay section is mapped.", &overlaylist
);
3206 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3207 "Assert that an overlay section is unmapped.", &overlaylist
);
3209 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3210 "List mappings of overlay sections.", &overlaylist
);
3212 add_cmd ("manual", class_support
, overlay_manual_command
,
3213 "Enable overlay debugging.", &overlaylist
);
3214 add_cmd ("off", class_support
, overlay_off_command
,
3215 "Disable overlay debugging.", &overlaylist
);
3216 add_cmd ("auto", class_support
, overlay_auto_command
,
3217 "Enable automatic overlay debugging.", &overlaylist
);
3218 add_cmd ("load-target", class_support
, overlay_load_command
,
3219 "Read the overlay mapping state from the target.", &overlaylist
);
3221 /* Filename extension to source language lookup table: */
3222 init_filename_language_table ();
3223 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3225 "Set mapping between filename extension and source language.\n\
3226 Usage: set extension-language .foo bar",
3228 c
->function
.cfunc
= set_ext_lang_command
;
3230 add_info ("extensions", info_ext_lang_command
,
3231 "All filename extensions associated with a source language.");
3234 (add_set_cmd ("download-write-size", class_obscure
,
3235 var_integer
, (char *) &download_write_size
,
3236 "Set the write size used when downloading a program.\n"
3237 "Only used when downloading a program onto a remote\n"
3238 "target. Specify zero, or a negative value, to disable\n"
3239 "blocked writes. The actual size of each transfer is also\n"
3240 "limited by the size of the target packet and the memory\n"