1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
35 #include "breakpoint.h"
37 #include "complaints.h"
39 #include "inferior.h" /* for write_pc */
40 #include "gdb-stabs.h"
42 #include "completer.h"
44 #include <sys/types.h>
46 #include "gdb_string.h"
57 /* Some HP-UX related globals to clear when a new "main"
58 symbol file is loaded. HP-specific. */
60 extern int hp_som_som_object_present
;
61 extern int hp_cxx_exception_support_initialized
;
62 #define RESET_HP_UX_GLOBALS() do {\
63 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
64 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
68 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
69 void (*show_load_progress
) (const char *section
,
70 unsigned long section_sent
,
71 unsigned long section_size
,
72 unsigned long total_sent
,
73 unsigned long total_size
);
74 void (*pre_add_symbol_hook
) (char *);
75 void (*post_add_symbol_hook
) (void);
76 void (*target_new_objfile_hook
) (struct objfile
*);
78 static void clear_symtab_users_cleanup (void *ignore
);
80 /* Global variables owned by this file */
81 int readnow_symbol_files
; /* Read full symbols immediately */
83 struct complaint oldsyms_complaint
=
85 "Replacing old symbols for `%s'", 0, 0
88 struct complaint empty_symtab_complaint
=
90 "Empty symbol table found for `%s'", 0, 0
93 struct complaint unknown_option_complaint
=
95 "Unknown option `%s' ignored", 0, 0
98 /* External variables and functions referenced. */
100 extern void report_transfer_performance (unsigned long, time_t, time_t);
102 /* Functions this file defines */
105 static int simple_read_overlay_region_table (void);
106 static void simple_free_overlay_region_table (void);
109 static void set_initial_language (void);
111 static void load_command (char *, int);
113 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
115 static void add_symbol_file_command (char *, int);
117 static void add_shared_symbol_files_command (char *, int);
119 static void cashier_psymtab (struct partial_symtab
*);
121 bfd
*symfile_bfd_open (char *);
123 int get_section_index (struct objfile
*, char *);
125 static void find_sym_fns (struct objfile
*);
127 static void decrement_reading_symtab (void *);
129 static void overlay_invalidate_all (void);
131 static int overlay_is_mapped (struct obj_section
*);
133 void list_overlays_command (char *, int);
135 void map_overlay_command (char *, int);
137 void unmap_overlay_command (char *, int);
139 static void overlay_auto_command (char *, int);
141 static void overlay_manual_command (char *, int);
143 static void overlay_off_command (char *, int);
145 static void overlay_load_command (char *, int);
147 static void overlay_command (char *, int);
149 static void simple_free_overlay_table (void);
151 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
153 static int simple_read_overlay_table (void);
155 static int simple_overlay_update_1 (struct obj_section
*);
157 static void add_filename_language (char *ext
, enum language lang
);
159 static void set_ext_lang_command (char *args
, int from_tty
);
161 static void info_ext_lang_command (char *args
, int from_tty
);
163 static void init_filename_language_table (void);
165 void _initialize_symfile (void);
167 /* List of all available sym_fns. On gdb startup, each object file reader
168 calls add_symtab_fns() to register information on each format it is
171 static struct sym_fns
*symtab_fns
= NULL
;
173 /* Flag for whether user will be reloading symbols multiple times.
174 Defaults to ON for VxWorks, otherwise OFF. */
176 #ifdef SYMBOL_RELOADING_DEFAULT
177 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
179 int symbol_reloading
= 0;
182 /* If non-zero, shared library symbols will be added automatically
183 when the inferior is created, new libraries are loaded, or when
184 attaching to the inferior. This is almost always what users will
185 want to have happen; but for very large programs, the startup time
186 will be excessive, and so if this is a problem, the user can clear
187 this flag and then add the shared library symbols as needed. Note
188 that there is a potential for confusion, since if the shared
189 library symbols are not loaded, commands like "info fun" will *not*
190 report all the functions that are actually present. */
192 int auto_solib_add
= 1;
194 /* For systems that support it, a threshold size in megabytes. If
195 automatically adding a new library's symbol table to those already
196 known to the debugger would cause the total shared library symbol
197 size to exceed this threshhold, then the shlib's symbols are not
198 added. The threshold is ignored if the user explicitly asks for a
199 shlib to be added, such as when using the "sharedlibrary"
202 int auto_solib_limit
;
205 /* Since this function is called from within qsort, in an ANSI environment
206 it must conform to the prototype for qsort, which specifies that the
207 comparison function takes two "void *" pointers. */
210 compare_symbols (const void *s1p
, const void *s2p
)
212 register struct symbol
**s1
, **s2
;
214 s1
= (struct symbol
**) s1p
;
215 s2
= (struct symbol
**) s2p
;
216 return (strcmp (SYMBOL_SOURCE_NAME (*s1
), SYMBOL_SOURCE_NAME (*s2
)));
223 compare_psymbols -- compare two partial symbols by name
227 Given pointers to pointers to two partial symbol table entries,
228 compare them by name and return -N, 0, or +N (ala strcmp).
229 Typically used by sorting routines like qsort().
233 Does direct compare of first two characters before punting
234 and passing to strcmp for longer compares. Note that the
235 original version had a bug whereby two null strings or two
236 identically named one character strings would return the
237 comparison of memory following the null byte.
242 compare_psymbols (const void *s1p
, const void *s2p
)
244 register struct partial_symbol
**s1
, **s2
;
245 register char *st1
, *st2
;
247 s1
= (struct partial_symbol
**) s1p
;
248 s2
= (struct partial_symbol
**) s2p
;
249 st1
= SYMBOL_SOURCE_NAME (*s1
);
250 st2
= SYMBOL_SOURCE_NAME (*s2
);
253 if ((st1
[0] - st2
[0]) || !st1
[0])
255 return (st1
[0] - st2
[0]);
257 else if ((st1
[1] - st2
[1]) || !st1
[1])
259 return (st1
[1] - st2
[1]);
263 return (strcmp (st1
, st2
));
268 sort_pst_symbols (struct partial_symtab
*pst
)
270 /* Sort the global list; don't sort the static list */
272 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
273 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
277 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
280 sort_block_syms (register struct block
*b
)
282 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
283 sizeof (struct symbol
*), compare_symbols
);
286 /* Call sort_symtab_syms to sort alphabetically
287 the symbols of each block of one symtab. */
290 sort_symtab_syms (register struct symtab
*s
)
292 register struct blockvector
*bv
;
295 register struct block
*b
;
299 bv
= BLOCKVECTOR (s
);
300 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
301 for (i
= 0; i
< nbl
; i
++)
303 b
= BLOCKVECTOR_BLOCK (bv
, i
);
304 if (BLOCK_SHOULD_SORT (b
))
309 /* Make a null terminated copy of the string at PTR with SIZE characters in
310 the obstack pointed to by OBSTACKP . Returns the address of the copy.
311 Note that the string at PTR does not have to be null terminated, I.E. it
312 may be part of a larger string and we are only saving a substring. */
315 obsavestring (char *ptr
, int size
, struct obstack
*obstackp
)
317 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
318 /* Open-coded memcpy--saves function call time. These strings are usually
319 short. FIXME: Is this really still true with a compiler that can
322 register char *p1
= ptr
;
323 register char *p2
= p
;
324 char *end
= ptr
+ size
;
332 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
333 in the obstack pointed to by OBSTACKP. */
336 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
339 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
340 register char *val
= (char *) obstack_alloc (obstackp
, len
);
347 /* True if we are nested inside psymtab_to_symtab. */
349 int currently_reading_symtab
= 0;
352 decrement_reading_symtab (void *dummy
)
354 currently_reading_symtab
--;
357 /* Get the symbol table that corresponds to a partial_symtab.
358 This is fast after the first time you do it. In fact, there
359 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
363 psymtab_to_symtab (register struct partial_symtab
*pst
)
365 /* If it's been looked up before, return it. */
369 /* If it has not yet been read in, read it. */
372 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
373 currently_reading_symtab
++;
374 (*pst
->read_symtab
) (pst
);
375 do_cleanups (back_to
);
381 /* Initialize entry point information for this objfile. */
384 init_entry_point_info (struct objfile
*objfile
)
386 /* Save startup file's range of PC addresses to help blockframe.c
387 decide where the bottom of the stack is. */
389 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
391 /* Executable file -- record its entry point so we'll recognize
392 the startup file because it contains the entry point. */
393 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
397 /* Examination of non-executable.o files. Short-circuit this stuff. */
398 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
400 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
401 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
402 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
403 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
404 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
405 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
408 /* Get current entry point address. */
411 entry_point_address (void)
413 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
416 /* Remember the lowest-addressed loadable section we've seen.
417 This function is called via bfd_map_over_sections.
419 In case of equal vmas, the section with the largest size becomes the
420 lowest-addressed loadable section.
422 If the vmas and sizes are equal, the last section is considered the
423 lowest-addressed loadable section. */
426 find_lowest_section (bfd
*abfd
, asection
*sect
, PTR obj
)
428 asection
**lowest
= (asection
**) obj
;
430 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
433 *lowest
= sect
; /* First loadable section */
434 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
435 *lowest
= sect
; /* A lower loadable section */
436 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
437 && (bfd_section_size (abfd
, (*lowest
))
438 <= bfd_section_size (abfd
, sect
)))
443 /* Build (allocate and populate) a section_addr_info struct from
444 an existing section table. */
446 extern struct section_addr_info
*
447 build_section_addr_info_from_section_table (const struct section_table
*start
,
448 const struct section_table
*end
)
450 struct section_addr_info
*sap
;
451 const struct section_table
*stp
;
454 sap
= xmalloc (sizeof (struct section_addr_info
));
455 memset (sap
, 0, sizeof (struct section_addr_info
));
457 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
459 if (bfd_get_section_flags (stp
->bfd
,
460 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
461 && oidx
< MAX_SECTIONS
)
463 sap
->other
[oidx
].addr
= stp
->addr
;
464 sap
->other
[oidx
].name
465 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
466 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
475 /* Free all memory allocated by build_section_addr_info_from_section_table. */
478 free_section_addr_info (struct section_addr_info
*sap
)
482 for (idx
= 0; idx
< MAX_SECTIONS
; idx
++)
483 if (sap
->other
[idx
].name
)
484 xfree (sap
->other
[idx
].name
);
489 /* Parse the user's idea of an offset for dynamic linking, into our idea
490 of how to represent it for fast symbol reading. This is the default
491 version of the sym_fns.sym_offsets function for symbol readers that
492 don't need to do anything special. It allocates a section_offsets table
493 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
496 default_symfile_offsets (struct objfile
*objfile
,
497 struct section_addr_info
*addrs
)
500 asection
*sect
= NULL
;
502 objfile
->num_sections
= SECT_OFF_MAX
;
503 objfile
->section_offsets
= (struct section_offsets
*)
504 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
505 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
507 /* Now calculate offsets for section that were specified by the
509 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
511 struct other_sections
*osp
;
513 osp
= &addrs
->other
[i
] ;
517 /* Record all sections in offsets */
518 /* The section_offsets in the objfile are here filled in using
520 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
523 /* Remember the bfd indexes for the .text, .data, .bss and
526 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
528 objfile
->sect_index_text
= sect
->index
;
530 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
532 objfile
->sect_index_data
= sect
->index
;
534 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
536 objfile
->sect_index_bss
= sect
->index
;
538 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
540 objfile
->sect_index_rodata
= sect
->index
;
544 /* Process a symbol file, as either the main file or as a dynamically
547 OBJFILE is where the symbols are to be read from.
549 ADDR is the address where the text segment was loaded, unless the
550 objfile is the main symbol file, in which case it is zero.
552 MAINLINE is nonzero if this is the main symbol file, or zero if
553 it's an extra symbol file such as dynamically loaded code.
555 VERBO is nonzero if the caller has printed a verbose message about
556 the symbol reading (and complaints can be more terse about it). */
559 syms_from_objfile (struct objfile
*objfile
, struct section_addr_info
*addrs
,
560 int mainline
, int verbo
)
562 asection
*lower_sect
;
564 CORE_ADDR lower_offset
;
565 struct section_addr_info local_addr
;
566 struct cleanup
*old_chain
;
569 /* If ADDRS is NULL, initialize the local section_addr_info struct and
570 point ADDRS to it. We now establish the convention that an addr of
571 zero means no load address was specified. */
575 memset (&local_addr
, 0, sizeof (local_addr
));
579 init_entry_point_info (objfile
);
580 find_sym_fns (objfile
);
582 if (objfile
->sf
== NULL
)
583 return; /* No symbols. */
585 /* Make sure that partially constructed symbol tables will be cleaned up
586 if an error occurs during symbol reading. */
587 old_chain
= make_cleanup_free_objfile (objfile
);
591 /* We will modify the main symbol table, make sure that all its users
592 will be cleaned up if an error occurs during symbol reading. */
593 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
595 /* Since no error yet, throw away the old symbol table. */
597 if (symfile_objfile
!= NULL
)
599 free_objfile (symfile_objfile
);
600 symfile_objfile
= NULL
;
603 /* Currently we keep symbols from the add-symbol-file command.
604 If the user wants to get rid of them, they should do "symbol-file"
605 without arguments first. Not sure this is the best behavior
608 (*objfile
->sf
->sym_new_init
) (objfile
);
611 /* Convert addr into an offset rather than an absolute address.
612 We find the lowest address of a loaded segment in the objfile,
613 and assume that <addr> is where that got loaded.
615 We no longer warn if the lowest section is not a text segment (as
616 happens for the PA64 port. */
619 /* Find lowest loadable section to be used as starting point for
620 continguous sections. FIXME!! won't work without call to find
621 .text first, but this assumes text is lowest section. */
622 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
623 if (lower_sect
== NULL
)
624 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
626 if (lower_sect
== NULL
)
627 warning ("no loadable sections found in added symbol-file %s",
630 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
631 warning ("Lowest section in %s is %s at %s",
633 bfd_section_name (objfile
->obfd
, lower_sect
),
634 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
635 if (lower_sect
!= NULL
)
636 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
640 /* Calculate offsets for the loadable sections.
641 FIXME! Sections must be in order of increasing loadable section
642 so that contiguous sections can use the lower-offset!!!
644 Adjust offsets if the segments are not contiguous.
645 If the section is contiguous, its offset should be set to
646 the offset of the highest loadable section lower than it
647 (the loadable section directly below it in memory).
648 this_offset = lower_offset = lower_addr - lower_orig_addr */
650 /* Calculate offsets for sections. */
651 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
653 if (addrs
->other
[i
].addr
!= 0)
655 sect
= bfd_get_section_by_name (objfile
->obfd
, addrs
->other
[i
].name
);
658 addrs
->other
[i
].addr
-= bfd_section_vma (objfile
->obfd
, sect
);
659 lower_offset
= addrs
->other
[i
].addr
;
660 /* This is the index used by BFD. */
661 addrs
->other
[i
].sectindex
= sect
->index
;
665 warning ("section %s not found in %s", addrs
->other
[i
].name
,
667 addrs
->other
[i
].addr
= 0;
671 addrs
->other
[i
].addr
= lower_offset
;
675 /* Initialize symbol reading routines for this objfile, allow complaints to
676 appear for this new file, and record how verbose to be, then do the
677 initial symbol reading for this file. */
679 (*objfile
->sf
->sym_init
) (objfile
);
680 clear_complaints (1, verbo
);
682 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
684 #ifndef IBM6000_TARGET
685 /* This is a SVR4/SunOS specific hack, I think. In any event, it
686 screws RS/6000. sym_offsets should be doing this sort of thing,
687 because it knows the mapping between bfd sections and
689 /* This is a hack. As far as I can tell, section offsets are not
690 target dependent. They are all set to addr with a couple of
691 exceptions. The exceptions are sysvr4 shared libraries, whose
692 offsets are kept in solib structures anyway and rs6000 xcoff
693 which handles shared libraries in a completely unique way.
695 Section offsets are built similarly, except that they are built
696 by adding addr in all cases because there is no clear mapping
697 from section_offsets into actual sections. Note that solib.c
698 has a different algorithm for finding section offsets.
700 These should probably all be collapsed into some target
701 independent form of shared library support. FIXME. */
705 struct obj_section
*s
;
707 /* Map section offsets in "addr" back to the object's
708 sections by comparing the section names with bfd's
709 section names. Then adjust the section address by
710 the offset. */ /* for gdb/13815 */
712 ALL_OBJFILE_OSECTIONS (objfile
, s
)
714 CORE_ADDR s_addr
= 0;
718 !s_addr
&& i
< MAX_SECTIONS
&& addrs
->other
[i
].name
;
720 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
722 addrs
->other
[i
].name
) == 0)
723 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
725 s
->addr
-= s
->offset
;
727 s
->endaddr
-= s
->offset
;
728 s
->endaddr
+= s_addr
;
732 #endif /* not IBM6000_TARGET */
734 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
736 if (!have_partial_symbols () && !have_full_symbols ())
739 printf_filtered ("(no debugging symbols found)...");
743 /* Don't allow char * to have a typename (else would get caddr_t).
744 Ditto void *. FIXME: Check whether this is now done by all the
745 symbol readers themselves (many of them now do), and if so remove
748 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
749 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
751 /* Mark the objfile has having had initial symbol read attempted. Note
752 that this does not mean we found any symbols... */
754 objfile
->flags
|= OBJF_SYMS
;
756 /* Discard cleanups as symbol reading was successful. */
758 discard_cleanups (old_chain
);
760 /* Call this after reading in a new symbol table to give target
761 dependent code a crack at the new symbols. For instance, this
762 could be used to update the values of target-specific symbols GDB
763 needs to keep track of (such as _sigtramp, or whatever). */
765 TARGET_SYMFILE_POSTREAD (objfile
);
768 /* Perform required actions after either reading in the initial
769 symbols for a new objfile, or mapping in the symbols from a reusable
773 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
776 /* If this is the main symbol file we have to clean up all users of the
777 old main symbol file. Otherwise it is sufficient to fixup all the
778 breakpoints that may have been redefined by this symbol file. */
781 /* OK, make it the "real" symbol file. */
782 symfile_objfile
= objfile
;
784 clear_symtab_users ();
788 breakpoint_re_set ();
791 /* We're done reading the symbol file; finish off complaints. */
792 clear_complaints (0, verbo
);
795 /* Process a symbol file, as either the main file or as a dynamically
798 NAME is the file name (which will be tilde-expanded and made
799 absolute herein) (but we don't free or modify NAME itself).
800 FROM_TTY says how verbose to be. MAINLINE specifies whether this
801 is the main symbol file, or whether it's an extra symbol file such
802 as dynamically loaded code. If !mainline, ADDR is the address
803 where the text segment was loaded.
805 Upon success, returns a pointer to the objfile that was added.
806 Upon failure, jumps back to command level (never returns). */
809 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
810 int mainline
, int flags
)
812 struct objfile
*objfile
;
813 struct partial_symtab
*psymtab
;
816 /* Open a bfd for the file, and give user a chance to burp if we'd be
817 interactively wiping out any existing symbols. */
819 abfd
= symfile_bfd_open (name
);
821 if ((have_full_symbols () || have_partial_symbols ())
824 && !query ("Load new symbol table from \"%s\"? ", name
))
825 error ("Not confirmed.");
827 objfile
= allocate_objfile (abfd
, flags
);
829 /* If the objfile uses a mapped symbol file, and we have a psymtab for
830 it, then skip reading any symbols at this time. */
832 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
834 /* We mapped in an existing symbol table file that already has had
835 initial symbol reading performed, so we can skip that part. Notify
836 the user that instead of reading the symbols, they have been mapped.
838 if (from_tty
|| info_verbose
)
840 printf_filtered ("Mapped symbols for %s...", name
);
842 gdb_flush (gdb_stdout
);
844 init_entry_point_info (objfile
);
845 find_sym_fns (objfile
);
849 /* We either created a new mapped symbol table, mapped an existing
850 symbol table file which has not had initial symbol reading
851 performed, or need to read an unmapped symbol table. */
852 if (from_tty
|| info_verbose
)
854 if (pre_add_symbol_hook
)
855 pre_add_symbol_hook (name
);
858 printf_filtered ("Reading symbols from %s...", name
);
860 gdb_flush (gdb_stdout
);
863 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
866 /* We now have at least a partial symbol table. Check to see if the
867 user requested that all symbols be read on initial access via either
868 the gdb startup command line or on a per symbol file basis. Expand
869 all partial symbol tables for this objfile if so. */
871 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
873 if (from_tty
|| info_verbose
)
875 printf_filtered ("expanding to full symbols...");
877 gdb_flush (gdb_stdout
);
880 for (psymtab
= objfile
->psymtabs
;
882 psymtab
= psymtab
->next
)
884 psymtab_to_symtab (psymtab
);
888 if (from_tty
|| info_verbose
)
890 if (post_add_symbol_hook
)
891 post_add_symbol_hook ();
894 printf_filtered ("done.\n");
895 gdb_flush (gdb_stdout
);
899 if (objfile
->sf
== NULL
)
900 return objfile
; /* No symbols. */
902 new_symfile_objfile (objfile
, mainline
, from_tty
);
904 if (target_new_objfile_hook
)
905 target_new_objfile_hook (objfile
);
910 /* Call symbol_file_add() with default values and update whatever is
911 affected by the loading of a new main().
912 Used when the file is supplied in the gdb command line
913 and by some targets with special loading requirements.
914 The auxiliary function, symbol_file_add_main_1(), has the flags
915 argument for the switches that can only be specified in the symbol_file
919 symbol_file_add_main (char *args
, int from_tty
)
921 symbol_file_add_main_1 (args
, from_tty
, 0);
925 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
927 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
930 RESET_HP_UX_GLOBALS ();
933 /* Getting new symbols may change our opinion about
934 what is frameless. */
935 reinit_frame_cache ();
937 set_initial_language ();
941 symbol_file_clear (int from_tty
)
943 if ((have_full_symbols () || have_partial_symbols ())
945 && !query ("Discard symbol table from `%s'? ",
946 symfile_objfile
->name
))
947 error ("Not confirmed.");
948 free_all_objfiles ();
950 /* solib descriptors may have handles to objfiles. Since their
951 storage has just been released, we'd better wipe the solib
954 #if defined(SOLIB_RESTART)
958 symfile_objfile
= NULL
;
960 printf_unfiltered ("No symbol file now.\n");
962 RESET_HP_UX_GLOBALS ();
966 /* This is the symbol-file command. Read the file, analyze its
967 symbols, and add a struct symtab to a symtab list. The syntax of
968 the command is rather bizarre--(1) buildargv implements various
969 quoting conventions which are undocumented and have little or
970 nothing in common with the way things are quoted (or not quoted)
971 elsewhere in GDB, (2) options are used, which are not generally
972 used in GDB (perhaps "set mapped on", "set readnow on" would be
973 better), (3) the order of options matters, which is contrary to GNU
974 conventions (because it is confusing and inconvenient). */
975 /* Note: ezannoni 2000-04-17. This function used to have support for
976 rombug (see remote-os9k.c). It consisted of a call to target_link()
977 (target.c) to get the address of the text segment from the target,
978 and pass that to symbol_file_add(). This is no longer supported. */
981 symbol_file_command (char *args
, int from_tty
)
985 struct cleanup
*cleanups
;
986 int flags
= OBJF_USERLOADED
;
992 symbol_file_clear (from_tty
);
996 if ((argv
= buildargv (args
)) == NULL
)
1000 cleanups
= make_cleanup_freeargv (argv
);
1001 while (*argv
!= NULL
)
1003 if (STREQ (*argv
, "-mapped"))
1004 flags
|= OBJF_MAPPED
;
1006 if (STREQ (*argv
, "-readnow"))
1007 flags
|= OBJF_READNOW
;
1010 error ("unknown option `%s'", *argv
);
1015 symbol_file_add_main_1 (name
, from_tty
, flags
);
1022 error ("no symbol file name was specified");
1024 do_cleanups (cleanups
);
1028 /* Set the initial language.
1030 A better solution would be to record the language in the psymtab when reading
1031 partial symbols, and then use it (if known) to set the language. This would
1032 be a win for formats that encode the language in an easily discoverable place,
1033 such as DWARF. For stabs, we can jump through hoops looking for specially
1034 named symbols or try to intuit the language from the specific type of stabs
1035 we find, but we can't do that until later when we read in full symbols.
1039 set_initial_language (void)
1041 struct partial_symtab
*pst
;
1042 enum language lang
= language_unknown
;
1044 pst
= find_main_psymtab ();
1047 if (pst
->filename
!= NULL
)
1049 lang
= deduce_language_from_filename (pst
->filename
);
1051 if (lang
== language_unknown
)
1053 /* Make C the default language */
1056 set_language (lang
);
1057 expected_language
= current_language
; /* Don't warn the user */
1061 /* Open file specified by NAME and hand it off to BFD for preliminary
1062 analysis. Result is a newly initialized bfd *, which includes a newly
1063 malloc'd` copy of NAME (tilde-expanded and made absolute).
1064 In case of trouble, error() is called. */
1067 symfile_bfd_open (char *name
)
1071 char *absolute_name
;
1075 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1077 /* Look down path for it, allocate 2nd new malloc'd copy. */
1078 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1079 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1082 char *exename
= alloca (strlen (name
) + 5);
1083 strcat (strcpy (exename
, name
), ".exe");
1084 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1090 make_cleanup (xfree
, name
);
1091 perror_with_name (name
);
1093 xfree (name
); /* Free 1st new malloc'd copy */
1094 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1095 /* It'll be freed in free_objfile(). */
1097 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1101 make_cleanup (xfree
, name
);
1102 error ("\"%s\": can't open to read symbols: %s.", name
,
1103 bfd_errmsg (bfd_get_error ()));
1105 sym_bfd
->cacheable
= 1;
1107 if (!bfd_check_format (sym_bfd
, bfd_object
))
1109 /* FIXME: should be checking for errors from bfd_close (for one thing,
1110 on error it does not free all the storage associated with the
1112 bfd_close (sym_bfd
); /* This also closes desc */
1113 make_cleanup (xfree
, name
);
1114 error ("\"%s\": can't read symbols: %s.", name
,
1115 bfd_errmsg (bfd_get_error ()));
1120 /* Return the section index for the given section name. Return -1 if
1121 the section was not found. */
1123 get_section_index (struct objfile
*objfile
, char *section_name
)
1125 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1132 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1133 startup by the _initialize routine in each object file format reader,
1134 to register information about each format the the reader is prepared
1138 add_symtab_fns (struct sym_fns
*sf
)
1140 sf
->next
= symtab_fns
;
1145 /* Initialize to read symbols from the symbol file sym_bfd. It either
1146 returns or calls error(). The result is an initialized struct sym_fns
1147 in the objfile structure, that contains cached information about the
1151 find_sym_fns (struct objfile
*objfile
)
1154 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1155 char *our_target
= bfd_get_target (objfile
->obfd
);
1157 if (our_flavour
== bfd_target_srec_flavour
1158 || our_flavour
== bfd_target_ihex_flavour
1159 || our_flavour
== bfd_target_tekhex_flavour
)
1160 return; /* No symbols. */
1162 /* Special kludge for apollo. See dstread.c. */
1163 if (STREQN (our_target
, "apollo", 6))
1164 our_flavour
= (enum bfd_flavour
) -2;
1166 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1168 if (our_flavour
== sf
->sym_flavour
)
1174 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1175 bfd_get_target (objfile
->obfd
));
1178 /* This function runs the load command of our current target. */
1181 load_command (char *arg
, int from_tty
)
1184 arg
= get_exec_file (1);
1185 target_load (arg
, from_tty
);
1187 /* After re-loading the executable, we don't really know which
1188 overlays are mapped any more. */
1189 overlay_cache_invalid
= 1;
1192 /* This version of "load" should be usable for any target. Currently
1193 it is just used for remote targets, not inftarg.c or core files,
1194 on the theory that only in that case is it useful.
1196 Avoiding xmodem and the like seems like a win (a) because we don't have
1197 to worry about finding it, and (b) On VMS, fork() is very slow and so
1198 we don't want to run a subprocess. On the other hand, I'm not sure how
1199 performance compares. */
1201 static int download_write_size
= 512;
1202 static int validate_download
= 0;
1204 /* Callback service function for generic_load (bfd_map_over_sections). */
1207 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1209 bfd_size_type
*sum
= data
;
1211 *sum
+= bfd_get_section_size_before_reloc (asec
);
1214 /* Opaque data for load_section_callback. */
1215 struct load_section_data
{
1216 unsigned long load_offset
;
1217 unsigned long write_count
;
1218 unsigned long data_count
;
1219 bfd_size_type total_size
;
1222 /* Callback service function for generic_load (bfd_map_over_sections). */
1225 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1227 struct load_section_data
*args
= data
;
1229 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1231 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1235 struct cleanup
*old_chain
;
1236 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1237 bfd_size_type block_size
;
1239 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
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. */
1252 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1253 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1255 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1261 bfd_size_type this_transfer
= size
- sent
;
1263 if (this_transfer
>= block_size
)
1264 this_transfer
= block_size
;
1265 len
= target_write_memory_partial (lma
, buffer
,
1266 this_transfer
, &err
);
1269 if (validate_download
)
1271 /* Broken memories and broken monitors manifest
1272 themselves here when bring new computers to
1273 life. This doubles already slow downloads. */
1274 /* NOTE: cagney/1999-10-18: A more efficient
1275 implementation might add a verify_memory()
1276 method to the target vector and then use
1277 that. remote.c could implement that method
1278 using the ``qCRC'' packet. */
1279 char *check
= xmalloc (len
);
1280 struct cleanup
*verify_cleanups
=
1281 make_cleanup (xfree
, check
);
1283 if (target_read_memory (lma
, check
, len
) != 0)
1284 error ("Download verify read failed at 0x%s",
1286 if (memcmp (buffer
, check
, len
) != 0)
1287 error ("Download verify compare failed at 0x%s",
1289 do_cleanups (verify_cleanups
);
1291 args
->data_count
+= len
;
1294 args
->write_count
+= 1;
1297 || (ui_load_progress_hook
!= NULL
1298 && ui_load_progress_hook (sect_name
, sent
)))
1299 error ("Canceled the download");
1301 if (show_load_progress
!= NULL
)
1302 show_load_progress (sect_name
, sent
, size
,
1303 args
->data_count
, args
->total_size
);
1305 while (sent
< size
);
1308 error ("Memory access error while loading section %s.", sect_name
);
1310 do_cleanups (old_chain
);
1316 generic_load (char *args
, int from_tty
)
1320 time_t start_time
, end_time
; /* Start and end times of download */
1322 struct cleanup
*old_cleanups
;
1324 struct load_section_data cbdata
;
1327 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1328 cbdata
.write_count
= 0; /* Number of writes needed. */
1329 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1330 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1332 /* Parse the input argument - the user can specify a load offset as
1333 a second argument. */
1334 filename
= xmalloc (strlen (args
) + 1);
1335 old_cleanups
= make_cleanup (xfree
, filename
);
1336 strcpy (filename
, args
);
1337 offptr
= strchr (filename
, ' ');
1342 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1343 if (offptr
== endptr
)
1344 error ("Invalid download offset:%s\n", offptr
);
1348 cbdata
.load_offset
= 0;
1350 /* Open the file for loading. */
1351 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1352 if (loadfile_bfd
== NULL
)
1354 perror_with_name (filename
);
1358 /* FIXME: should be checking for errors from bfd_close (for one thing,
1359 on error it does not free all the storage associated with the
1361 make_cleanup_bfd_close (loadfile_bfd
);
1363 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1365 error ("\"%s\" is not an object file: %s", filename
,
1366 bfd_errmsg (bfd_get_error ()));
1369 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1370 (void *) &cbdata
.total_size
);
1372 start_time
= time (NULL
);
1374 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1376 end_time
= time (NULL
);
1378 entry
= bfd_get_start_address (loadfile_bfd
);
1379 ui_out_text (uiout
, "Start address ");
1380 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1381 ui_out_text (uiout
, ", load size ");
1382 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1383 ui_out_text (uiout
, "\n");
1384 /* We were doing this in remote-mips.c, I suspect it is right
1385 for other targets too. */
1388 /* FIXME: are we supposed to call symbol_file_add or not? According to
1389 a comment from remote-mips.c (where a call to symbol_file_add was
1390 commented out), making the call confuses GDB if more than one file is
1391 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1394 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1395 cbdata
.write_count
, end_time
- start_time
);
1397 do_cleanups (old_cleanups
);
1400 /* Report how fast the transfer went. */
1402 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1403 replaced by print_transfer_performance (with a very different
1404 function signature). */
1407 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1410 print_transfer_performance (gdb_stdout
, data_count
,
1411 end_time
- start_time
, 0);
1415 print_transfer_performance (struct ui_file
*stream
,
1416 unsigned long data_count
,
1417 unsigned long write_count
,
1418 unsigned long time_count
)
1420 ui_out_text (uiout
, "Transfer rate: ");
1423 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1424 (data_count
* 8) / time_count
);
1425 ui_out_text (uiout
, " bits/sec");
1429 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1430 ui_out_text (uiout
, " bits in <1 sec");
1432 if (write_count
> 0)
1434 ui_out_text (uiout
, ", ");
1435 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1436 ui_out_text (uiout
, " bytes/write");
1438 ui_out_text (uiout
, ".\n");
1441 /* This function allows the addition of incrementally linked object files.
1442 It does not modify any state in the target, only in the debugger. */
1443 /* Note: ezannoni 2000-04-13 This function/command used to have a
1444 special case syntax for the rombug target (Rombug is the boot
1445 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1446 rombug case, the user doesn't need to supply a text address,
1447 instead a call to target_link() (in target.c) would supply the
1448 value to use. We are now discontinuing this type of ad hoc syntax. */
1452 add_symbol_file_command (char *args
, int from_tty
)
1454 char *filename
= NULL
;
1455 int flags
= OBJF_USERLOADED
;
1457 int expecting_option
= 0;
1458 int section_index
= 0;
1462 int expecting_sec_name
= 0;
1463 int expecting_sec_addr
= 0;
1469 } sect_opts
[SECT_OFF_MAX
];
1471 struct section_addr_info section_addrs
;
1472 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1477 error ("add-symbol-file takes a file name and an address");
1479 /* Make a copy of the string that we can safely write into. */
1480 args
= xstrdup (args
);
1482 /* Ensure section_addrs is initialized */
1483 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1485 while (*args
!= '\000')
1487 /* Any leading spaces? */
1488 while (isspace (*args
))
1491 /* Point arg to the beginning of the argument. */
1494 /* Move args pointer over the argument. */
1495 while ((*args
!= '\000') && !isspace (*args
))
1498 /* If there are more arguments, terminate arg and
1500 if (*args
!= '\000')
1503 /* Now process the argument. */
1506 /* The first argument is the file name. */
1507 filename
= tilde_expand (arg
);
1508 make_cleanup (xfree
, filename
);
1513 /* The second argument is always the text address at which
1514 to load the program. */
1515 sect_opts
[section_index
].name
= ".text";
1516 sect_opts
[section_index
].value
= arg
;
1521 /* It's an option (starting with '-') or it's an argument
1526 if (strcmp (arg
, "-mapped") == 0)
1527 flags
|= OBJF_MAPPED
;
1529 if (strcmp (arg
, "-readnow") == 0)
1530 flags
|= OBJF_READNOW
;
1532 if (strcmp (arg
, "-s") == 0)
1534 if (section_index
>= SECT_OFF_MAX
)
1535 error ("Too many sections specified.");
1536 expecting_sec_name
= 1;
1537 expecting_sec_addr
= 1;
1542 if (expecting_sec_name
)
1544 sect_opts
[section_index
].name
= arg
;
1545 expecting_sec_name
= 0;
1548 if (expecting_sec_addr
)
1550 sect_opts
[section_index
].value
= arg
;
1551 expecting_sec_addr
= 0;
1555 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1561 /* Print the prompt for the query below. And save the arguments into
1562 a sect_addr_info structure to be passed around to other
1563 functions. We have to split this up into separate print
1564 statements because local_hex_string returns a local static
1567 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1568 for (i
= 0; i
< section_index
; i
++)
1571 char *val
= sect_opts
[i
].value
;
1572 char *sec
= sect_opts
[i
].name
;
1574 val
= sect_opts
[i
].value
;
1575 if (val
[0] == '0' && val
[1] == 'x')
1576 addr
= strtoul (val
+2, NULL
, 16);
1578 addr
= strtoul (val
, NULL
, 10);
1580 /* Here we store the section offsets in the order they were
1581 entered on the command line. */
1582 section_addrs
.other
[sec_num
].name
= sec
;
1583 section_addrs
.other
[sec_num
].addr
= addr
;
1584 printf_filtered ("\t%s_addr = %s\n",
1586 local_hex_string ((unsigned long)addr
));
1589 /* The object's sections are initialized when a
1590 call is made to build_objfile_section_table (objfile).
1591 This happens in reread_symbols.
1592 At this point, we don't know what file type this is,
1593 so we can't determine what section names are valid. */
1596 if (from_tty
&& (!query ("%s", "")))
1597 error ("Not confirmed.");
1599 symbol_file_add (filename
, from_tty
, §ion_addrs
, 0, flags
);
1601 /* Getting new symbols may change our opinion about what is
1603 reinit_frame_cache ();
1604 do_cleanups (my_cleanups
);
1608 add_shared_symbol_files_command (char *args
, int from_tty
)
1610 #ifdef ADD_SHARED_SYMBOL_FILES
1611 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1613 error ("This command is not available in this configuration of GDB.");
1617 /* Re-read symbols if a symbol-file has changed. */
1619 reread_symbols (void)
1621 struct objfile
*objfile
;
1624 struct stat new_statbuf
;
1627 /* With the addition of shared libraries, this should be modified,
1628 the load time should be saved in the partial symbol tables, since
1629 different tables may come from different source files. FIXME.
1630 This routine should then walk down each partial symbol table
1631 and see if the symbol table that it originates from has been changed */
1633 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1637 #ifdef IBM6000_TARGET
1638 /* If this object is from a shared library, then you should
1639 stat on the library name, not member name. */
1641 if (objfile
->obfd
->my_archive
)
1642 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1645 res
= stat (objfile
->name
, &new_statbuf
);
1648 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1649 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1653 new_modtime
= new_statbuf
.st_mtime
;
1654 if (new_modtime
!= objfile
->mtime
)
1656 struct cleanup
*old_cleanups
;
1657 struct section_offsets
*offsets
;
1659 char *obfd_filename
;
1661 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1664 /* There are various functions like symbol_file_add,
1665 symfile_bfd_open, syms_from_objfile, etc., which might
1666 appear to do what we want. But they have various other
1667 effects which we *don't* want. So we just do stuff
1668 ourselves. We don't worry about mapped files (for one thing,
1669 any mapped file will be out of date). */
1671 /* If we get an error, blow away this objfile (not sure if
1672 that is the correct response for things like shared
1674 old_cleanups
= make_cleanup_free_objfile (objfile
);
1675 /* We need to do this whenever any symbols go away. */
1676 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1678 /* Clean up any state BFD has sitting around. We don't need
1679 to close the descriptor but BFD lacks a way of closing the
1680 BFD without closing the descriptor. */
1681 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1682 if (!bfd_close (objfile
->obfd
))
1683 error ("Can't close BFD for %s: %s", objfile
->name
,
1684 bfd_errmsg (bfd_get_error ()));
1685 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1686 if (objfile
->obfd
== NULL
)
1687 error ("Can't open %s to read symbols.", objfile
->name
);
1688 /* bfd_openr sets cacheable to true, which is what we want. */
1689 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1690 error ("Can't read symbols from %s: %s.", objfile
->name
,
1691 bfd_errmsg (bfd_get_error ()));
1693 /* Save the offsets, we will nuke them with the rest of the
1695 num_offsets
= objfile
->num_sections
;
1696 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1697 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1699 /* Nuke all the state that we will re-read. Much of the following
1700 code which sets things to NULL really is necessary to tell
1701 other parts of GDB that there is nothing currently there. */
1703 /* FIXME: Do we have to free a whole linked list, or is this
1705 if (objfile
->global_psymbols
.list
)
1706 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1707 memset (&objfile
->global_psymbols
, 0,
1708 sizeof (objfile
->global_psymbols
));
1709 if (objfile
->static_psymbols
.list
)
1710 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1711 memset (&objfile
->static_psymbols
, 0,
1712 sizeof (objfile
->static_psymbols
));
1714 /* Free the obstacks for non-reusable objfiles */
1715 free_bcache (&objfile
->psymbol_cache
);
1716 obstack_free (&objfile
->psymbol_obstack
, 0);
1717 obstack_free (&objfile
->symbol_obstack
, 0);
1718 obstack_free (&objfile
->type_obstack
, 0);
1719 objfile
->sections
= NULL
;
1720 objfile
->symtabs
= NULL
;
1721 objfile
->psymtabs
= NULL
;
1722 objfile
->free_psymtabs
= NULL
;
1723 objfile
->msymbols
= NULL
;
1724 objfile
->minimal_symbol_count
= 0;
1725 memset (&objfile
->msymbol_hash
, 0,
1726 sizeof (objfile
->msymbol_hash
));
1727 memset (&objfile
->msymbol_demangled_hash
, 0,
1728 sizeof (objfile
->msymbol_demangled_hash
));
1729 objfile
->fundamental_types
= NULL
;
1730 if (objfile
->sf
!= NULL
)
1732 (*objfile
->sf
->sym_finish
) (objfile
);
1735 /* We never make this a mapped file. */
1737 /* obstack_specify_allocation also initializes the obstack so
1739 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1741 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1743 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1745 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1747 if (build_objfile_section_table (objfile
))
1749 error ("Can't find the file sections in `%s': %s",
1750 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1753 /* We use the same section offsets as from last time. I'm not
1754 sure whether that is always correct for shared libraries. */
1755 objfile
->section_offsets
= (struct section_offsets
*)
1756 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1757 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1758 objfile
->num_sections
= num_offsets
;
1760 /* What the hell is sym_new_init for, anyway? The concept of
1761 distinguishing between the main file and additional files
1762 in this way seems rather dubious. */
1763 if (objfile
== symfile_objfile
)
1765 (*objfile
->sf
->sym_new_init
) (objfile
);
1767 RESET_HP_UX_GLOBALS ();
1771 (*objfile
->sf
->sym_init
) (objfile
);
1772 clear_complaints (1, 1);
1773 /* The "mainline" parameter is a hideous hack; I think leaving it
1774 zero is OK since dbxread.c also does what it needs to do if
1775 objfile->global_psymbols.size is 0. */
1776 (*objfile
->sf
->sym_read
) (objfile
, 0);
1777 if (!have_partial_symbols () && !have_full_symbols ())
1780 printf_filtered ("(no debugging symbols found)\n");
1783 objfile
->flags
|= OBJF_SYMS
;
1785 /* We're done reading the symbol file; finish off complaints. */
1786 clear_complaints (0, 1);
1788 /* Getting new symbols may change our opinion about what is
1791 reinit_frame_cache ();
1793 /* Discard cleanups as symbol reading was successful. */
1794 discard_cleanups (old_cleanups
);
1796 /* If the mtime has changed between the time we set new_modtime
1797 and now, we *want* this to be out of date, so don't call stat
1799 objfile
->mtime
= new_modtime
;
1802 /* Call this after reading in a new symbol table to give target
1803 dependent code a crack at the new symbols. For instance, this
1804 could be used to update the values of target-specific symbols GDB
1805 needs to keep track of (such as _sigtramp, or whatever). */
1807 TARGET_SYMFILE_POSTREAD (objfile
);
1813 clear_symtab_users ();
1825 static filename_language
*filename_language_table
;
1826 static int fl_table_size
, fl_table_next
;
1829 add_filename_language (char *ext
, enum language lang
)
1831 if (fl_table_next
>= fl_table_size
)
1833 fl_table_size
+= 10;
1834 filename_language_table
= xrealloc (filename_language_table
,
1838 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
1839 filename_language_table
[fl_table_next
].lang
= lang
;
1843 static char *ext_args
;
1846 set_ext_lang_command (char *args
, int from_tty
)
1849 char *cp
= ext_args
;
1852 /* First arg is filename extension, starting with '.' */
1854 error ("'%s': Filename extension must begin with '.'", ext_args
);
1856 /* Find end of first arg. */
1857 while (*cp
&& !isspace (*cp
))
1861 error ("'%s': two arguments required -- filename extension and language",
1864 /* Null-terminate first arg */
1867 /* Find beginning of second arg, which should be a source language. */
1868 while (*cp
&& isspace (*cp
))
1872 error ("'%s': two arguments required -- filename extension and language",
1875 /* Lookup the language from among those we know. */
1876 lang
= language_enum (cp
);
1878 /* Now lookup the filename extension: do we already know it? */
1879 for (i
= 0; i
< fl_table_next
; i
++)
1880 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1883 if (i
>= fl_table_next
)
1885 /* new file extension */
1886 add_filename_language (ext_args
, lang
);
1890 /* redefining a previously known filename extension */
1893 /* query ("Really make files of type %s '%s'?", */
1894 /* ext_args, language_str (lang)); */
1896 xfree (filename_language_table
[i
].ext
);
1897 filename_language_table
[i
].ext
= xstrdup (ext_args
);
1898 filename_language_table
[i
].lang
= lang
;
1903 info_ext_lang_command (char *args
, int from_tty
)
1907 printf_filtered ("Filename extensions and the languages they represent:");
1908 printf_filtered ("\n\n");
1909 for (i
= 0; i
< fl_table_next
; i
++)
1910 printf_filtered ("\t%s\t- %s\n",
1911 filename_language_table
[i
].ext
,
1912 language_str (filename_language_table
[i
].lang
));
1916 init_filename_language_table (void)
1918 if (fl_table_size
== 0) /* protect against repetition */
1922 filename_language_table
=
1923 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1924 add_filename_language (".c", language_c
);
1925 add_filename_language (".C", language_cplus
);
1926 add_filename_language (".cc", language_cplus
);
1927 add_filename_language (".cp", language_cplus
);
1928 add_filename_language (".cpp", language_cplus
);
1929 add_filename_language (".cxx", language_cplus
);
1930 add_filename_language (".c++", language_cplus
);
1931 add_filename_language (".java", language_java
);
1932 add_filename_language (".class", language_java
);
1933 add_filename_language (".ch", language_chill
);
1934 add_filename_language (".c186", language_chill
);
1935 add_filename_language (".c286", language_chill
);
1936 add_filename_language (".f", language_fortran
);
1937 add_filename_language (".F", language_fortran
);
1938 add_filename_language (".s", language_asm
);
1939 add_filename_language (".S", language_asm
);
1940 add_filename_language (".pas", language_pascal
);
1941 add_filename_language (".p", language_pascal
);
1942 add_filename_language (".pp", language_pascal
);
1947 deduce_language_from_filename (char *filename
)
1952 if (filename
!= NULL
)
1953 if ((cp
= strrchr (filename
, '.')) != NULL
)
1954 for (i
= 0; i
< fl_table_next
; i
++)
1955 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1956 return filename_language_table
[i
].lang
;
1958 return language_unknown
;
1963 Allocate and partly initialize a new symbol table. Return a pointer
1964 to it. error() if no space.
1966 Caller must set these fields:
1972 possibly free_named_symtabs (symtab->filename);
1976 allocate_symtab (char *filename
, struct objfile
*objfile
)
1978 register struct symtab
*symtab
;
1980 symtab
= (struct symtab
*)
1981 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
1982 memset (symtab
, 0, sizeof (*symtab
));
1983 symtab
->filename
= obsavestring (filename
, strlen (filename
),
1984 &objfile
->symbol_obstack
);
1985 symtab
->fullname
= NULL
;
1986 symtab
->language
= deduce_language_from_filename (filename
);
1987 symtab
->debugformat
= obsavestring ("unknown", 7,
1988 &objfile
->symbol_obstack
);
1990 /* Hook it to the objfile it comes from */
1992 symtab
->objfile
= objfile
;
1993 symtab
->next
= objfile
->symtabs
;
1994 objfile
->symtabs
= symtab
;
1996 /* FIXME: This should go away. It is only defined for the Z8000,
1997 and the Z8000 definition of this macro doesn't have anything to
1998 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1999 here for convenience. */
2000 #ifdef INIT_EXTRA_SYMTAB_INFO
2001 INIT_EXTRA_SYMTAB_INFO (symtab
);
2007 struct partial_symtab
*
2008 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2010 struct partial_symtab
*psymtab
;
2012 if (objfile
->free_psymtabs
)
2014 psymtab
= objfile
->free_psymtabs
;
2015 objfile
->free_psymtabs
= psymtab
->next
;
2018 psymtab
= (struct partial_symtab
*)
2019 obstack_alloc (&objfile
->psymbol_obstack
,
2020 sizeof (struct partial_symtab
));
2022 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2023 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2024 &objfile
->psymbol_obstack
);
2025 psymtab
->symtab
= NULL
;
2027 /* Prepend it to the psymtab list for the objfile it belongs to.
2028 Psymtabs are searched in most recent inserted -> least recent
2031 psymtab
->objfile
= objfile
;
2032 psymtab
->next
= objfile
->psymtabs
;
2033 objfile
->psymtabs
= psymtab
;
2036 struct partial_symtab
**prev_pst
;
2037 psymtab
->objfile
= objfile
;
2038 psymtab
->next
= NULL
;
2039 prev_pst
= &(objfile
->psymtabs
);
2040 while ((*prev_pst
) != NULL
)
2041 prev_pst
= &((*prev_pst
)->next
);
2042 (*prev_pst
) = psymtab
;
2050 discard_psymtab (struct partial_symtab
*pst
)
2052 struct partial_symtab
**prev_pst
;
2055 Empty psymtabs happen as a result of header files which don't
2056 have any symbols in them. There can be a lot of them. But this
2057 check is wrong, in that a psymtab with N_SLINE entries but
2058 nothing else is not empty, but we don't realize that. Fixing
2059 that without slowing things down might be tricky. */
2061 /* First, snip it out of the psymtab chain */
2063 prev_pst
= &(pst
->objfile
->psymtabs
);
2064 while ((*prev_pst
) != pst
)
2065 prev_pst
= &((*prev_pst
)->next
);
2066 (*prev_pst
) = pst
->next
;
2068 /* Next, put it on a free list for recycling */
2070 pst
->next
= pst
->objfile
->free_psymtabs
;
2071 pst
->objfile
->free_psymtabs
= pst
;
2075 /* Reset all data structures in gdb which may contain references to symbol
2079 clear_symtab_users (void)
2081 /* Someday, we should do better than this, by only blowing away
2082 the things that really need to be blown. */
2083 clear_value_history ();
2085 clear_internalvars ();
2086 breakpoint_re_set ();
2087 set_default_breakpoint (0, 0, 0, 0);
2088 current_source_symtab
= 0;
2089 current_source_line
= 0;
2090 clear_pc_function_cache ();
2091 if (target_new_objfile_hook
)
2092 target_new_objfile_hook (NULL
);
2096 clear_symtab_users_cleanup (void *ignore
)
2098 clear_symtab_users ();
2101 /* clear_symtab_users_once:
2103 This function is run after symbol reading, or from a cleanup.
2104 If an old symbol table was obsoleted, the old symbol table
2105 has been blown away, but the other GDB data structures that may
2106 reference it have not yet been cleared or re-directed. (The old
2107 symtab was zapped, and the cleanup queued, in free_named_symtab()
2110 This function can be queued N times as a cleanup, or called
2111 directly; it will do all the work the first time, and then will be a
2112 no-op until the next time it is queued. This works by bumping a
2113 counter at queueing time. Much later when the cleanup is run, or at
2114 the end of symbol processing (in case the cleanup is discarded), if
2115 the queued count is greater than the "done-count", we do the work
2116 and set the done-count to the queued count. If the queued count is
2117 less than or equal to the done-count, we just ignore the call. This
2118 is needed because reading a single .o file will often replace many
2119 symtabs (one per .h file, for example), and we don't want to reset
2120 the breakpoints N times in the user's face.
2122 The reason we both queue a cleanup, and call it directly after symbol
2123 reading, is because the cleanup protects us in case of errors, but is
2124 discarded if symbol reading is successful. */
2127 /* FIXME: As free_named_symtabs is currently a big noop this function
2128 is no longer needed. */
2129 static void clear_symtab_users_once (void);
2131 static int clear_symtab_users_queued
;
2132 static int clear_symtab_users_done
;
2135 clear_symtab_users_once (void)
2137 /* Enforce once-per-`do_cleanups'-semantics */
2138 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2140 clear_symtab_users_done
= clear_symtab_users_queued
;
2142 clear_symtab_users ();
2146 /* Delete the specified psymtab, and any others that reference it. */
2149 cashier_psymtab (struct partial_symtab
*pst
)
2151 struct partial_symtab
*ps
, *pprev
= NULL
;
2154 /* Find its previous psymtab in the chain */
2155 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2164 /* Unhook it from the chain. */
2165 if (ps
== pst
->objfile
->psymtabs
)
2166 pst
->objfile
->psymtabs
= ps
->next
;
2168 pprev
->next
= ps
->next
;
2170 /* FIXME, we can't conveniently deallocate the entries in the
2171 partial_symbol lists (global_psymbols/static_psymbols) that
2172 this psymtab points to. These just take up space until all
2173 the psymtabs are reclaimed. Ditto the dependencies list and
2174 filename, which are all in the psymbol_obstack. */
2176 /* We need to cashier any psymtab that has this one as a dependency... */
2178 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2180 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2182 if (ps
->dependencies
[i
] == pst
)
2184 cashier_psymtab (ps
);
2185 goto again
; /* Must restart, chain has been munged. */
2192 /* If a symtab or psymtab for filename NAME is found, free it along
2193 with any dependent breakpoints, displays, etc.
2194 Used when loading new versions of object modules with the "add-file"
2195 command. This is only called on the top-level symtab or psymtab's name;
2196 it is not called for subsidiary files such as .h files.
2198 Return value is 1 if we blew away the environment, 0 if not.
2199 FIXME. The return value appears to never be used.
2201 FIXME. I think this is not the best way to do this. We should
2202 work on being gentler to the environment while still cleaning up
2203 all stray pointers into the freed symtab. */
2206 free_named_symtabs (char *name
)
2209 /* FIXME: With the new method of each objfile having it's own
2210 psymtab list, this function needs serious rethinking. In particular,
2211 why was it ever necessary to toss psymtabs with specific compilation
2212 unit filenames, as opposed to all psymtabs from a particular symbol
2214 Well, the answer is that some systems permit reloading of particular
2215 compilation units. We want to blow away any old info about these
2216 compilation units, regardless of which objfiles they arrived in. --gnu. */
2218 register struct symtab
*s
;
2219 register struct symtab
*prev
;
2220 register struct partial_symtab
*ps
;
2221 struct blockvector
*bv
;
2224 /* We only wack things if the symbol-reload switch is set. */
2225 if (!symbol_reloading
)
2228 /* Some symbol formats have trouble providing file names... */
2229 if (name
== 0 || *name
== '\0')
2232 /* Look for a psymtab with the specified name. */
2235 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2237 if (STREQ (name
, ps
->filename
))
2239 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2240 goto again2
; /* Must restart, chain has been munged */
2244 /* Look for a symtab with the specified name. */
2246 for (s
= symtab_list
; s
; s
= s
->next
)
2248 if (STREQ (name
, s
->filename
))
2255 if (s
== symtab_list
)
2256 symtab_list
= s
->next
;
2258 prev
->next
= s
->next
;
2260 /* For now, queue a delete for all breakpoints, displays, etc., whether
2261 or not they depend on the symtab being freed. This should be
2262 changed so that only those data structures affected are deleted. */
2264 /* But don't delete anything if the symtab is empty.
2265 This test is necessary due to a bug in "dbxread.c" that
2266 causes empty symtabs to be created for N_SO symbols that
2267 contain the pathname of the object file. (This problem
2268 has been fixed in GDB 3.9x). */
2270 bv
= BLOCKVECTOR (s
);
2271 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2272 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2273 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2275 complain (&oldsyms_complaint
, name
);
2277 clear_symtab_users_queued
++;
2278 make_cleanup (clear_symtab_users_once
, 0);
2283 complain (&empty_symtab_complaint
, name
);
2290 /* It is still possible that some breakpoints will be affected
2291 even though no symtab was found, since the file might have
2292 been compiled without debugging, and hence not be associated
2293 with a symtab. In order to handle this correctly, we would need
2294 to keep a list of text address ranges for undebuggable files.
2295 For now, we do nothing, since this is a fairly obscure case. */
2299 /* FIXME, what about the minimal symbol table? */
2306 /* Allocate and partially fill a partial symtab. It will be
2307 completely filled at the end of the symbol list.
2309 FILENAME is the name of the symbol-file we are reading from. */
2311 struct partial_symtab
*
2312 start_psymtab_common (struct objfile
*objfile
,
2313 struct section_offsets
*section_offsets
, char *filename
,
2314 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2315 struct partial_symbol
**static_syms
)
2317 struct partial_symtab
*psymtab
;
2319 psymtab
= allocate_psymtab (filename
, objfile
);
2320 psymtab
->section_offsets
= section_offsets
;
2321 psymtab
->textlow
= textlow
;
2322 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2323 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2324 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2328 /* Add a symbol with a long value to a psymtab.
2329 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2332 add_psymbol_to_list (char *name
, int namelength
, namespace_enum
namespace,
2333 enum address_class
class,
2334 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2335 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2336 enum language language
, struct objfile
*objfile
)
2338 register struct partial_symbol
*psym
;
2339 char *buf
= alloca (namelength
+ 1);
2340 /* psymbol is static so that there will be no uninitialized gaps in the
2341 structure which might contain random data, causing cache misses in
2343 static struct partial_symbol psymbol
;
2345 /* Create local copy of the partial symbol */
2346 memcpy (buf
, name
, namelength
);
2347 buf
[namelength
] = '\0';
2348 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2349 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2352 SYMBOL_VALUE (&psymbol
) = val
;
2356 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2358 SYMBOL_SECTION (&psymbol
) = 0;
2359 SYMBOL_LANGUAGE (&psymbol
) = language
;
2360 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2361 PSYMBOL_CLASS (&psymbol
) = class;
2362 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2364 /* Stash the partial symbol away in the cache */
2365 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2367 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2368 if (list
->next
>= list
->list
+ list
->size
)
2370 extend_psymbol_list (list
, objfile
);
2372 *list
->next
++ = psym
;
2373 OBJSTAT (objfile
, n_psyms
++);
2376 /* Add a symbol with a long value to a psymtab. This differs from
2377 * add_psymbol_to_list above in taking both a mangled and a demangled
2381 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2382 int dem_namelength
, namespace_enum
namespace,
2383 enum address_class
class,
2384 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2385 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2386 enum language language
,
2387 struct objfile
*objfile
)
2389 register struct partial_symbol
*psym
;
2390 char *buf
= alloca (namelength
+ 1);
2391 /* psymbol is static so that there will be no uninitialized gaps in the
2392 structure which might contain random data, causing cache misses in
2394 static struct partial_symbol psymbol
;
2396 /* Create local copy of the partial symbol */
2398 memcpy (buf
, name
, namelength
);
2399 buf
[namelength
] = '\0';
2400 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2402 buf
= alloca (dem_namelength
+ 1);
2403 memcpy (buf
, dem_name
, dem_namelength
);
2404 buf
[dem_namelength
] = '\0';
2409 case language_cplus
:
2410 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2411 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2413 case language_chill
:
2414 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2415 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2417 /* FIXME What should be done for the default case? Ignoring for now. */
2420 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2423 SYMBOL_VALUE (&psymbol
) = val
;
2427 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2429 SYMBOL_SECTION (&psymbol
) = 0;
2430 SYMBOL_LANGUAGE (&psymbol
) = language
;
2431 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2432 PSYMBOL_CLASS (&psymbol
) = class;
2433 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2435 /* Stash the partial symbol away in the cache */
2436 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2438 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2439 if (list
->next
>= list
->list
+ list
->size
)
2441 extend_psymbol_list (list
, objfile
);
2443 *list
->next
++ = psym
;
2444 OBJSTAT (objfile
, n_psyms
++);
2447 /* Initialize storage for partial symbols. */
2450 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2452 /* Free any previously allocated psymbol lists. */
2454 if (objfile
->global_psymbols
.list
)
2456 xmfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2458 if (objfile
->static_psymbols
.list
)
2460 xmfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2463 /* Current best guess is that approximately a twentieth
2464 of the total symbols (in a debugging file) are global or static
2467 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2468 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2470 if (objfile
->global_psymbols
.size
> 0)
2472 objfile
->global_psymbols
.next
=
2473 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2474 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2475 * sizeof (struct partial_symbol
*)));
2477 if (objfile
->static_psymbols
.size
> 0)
2479 objfile
->static_psymbols
.next
=
2480 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2481 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2482 * sizeof (struct partial_symbol
*)));
2487 The following code implements an abstraction for debugging overlay sections.
2489 The target model is as follows:
2490 1) The gnu linker will permit multiple sections to be mapped into the
2491 same VMA, each with its own unique LMA (or load address).
2492 2) It is assumed that some runtime mechanism exists for mapping the
2493 sections, one by one, from the load address into the VMA address.
2494 3) This code provides a mechanism for gdb to keep track of which
2495 sections should be considered to be mapped from the VMA to the LMA.
2496 This information is used for symbol lookup, and memory read/write.
2497 For instance, if a section has been mapped then its contents
2498 should be read from the VMA, otherwise from the LMA.
2500 Two levels of debugger support for overlays are available. One is
2501 "manual", in which the debugger relies on the user to tell it which
2502 overlays are currently mapped. This level of support is
2503 implemented entirely in the core debugger, and the information about
2504 whether a section is mapped is kept in the objfile->obj_section table.
2506 The second level of support is "automatic", and is only available if
2507 the target-specific code provides functionality to read the target's
2508 overlay mapping table, and translate its contents for the debugger
2509 (by updating the mapped state information in the obj_section tables).
2511 The interface is as follows:
2513 overlay map <name> -- tell gdb to consider this section mapped
2514 overlay unmap <name> -- tell gdb to consider this section unmapped
2515 overlay list -- list the sections that GDB thinks are mapped
2516 overlay read-target -- get the target's state of what's mapped
2517 overlay off/manual/auto -- set overlay debugging state
2518 Functional interface:
2519 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2520 section, return that section.
2521 find_pc_overlay(pc): find any overlay section that contains
2522 the pc, either in its VMA or its LMA
2523 overlay_is_mapped(sect): true if overlay is marked as mapped
2524 section_is_overlay(sect): true if section's VMA != LMA
2525 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2526 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2527 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2528 overlay_mapped_address(...): map an address from section's LMA to VMA
2529 overlay_unmapped_address(...): map an address from section's VMA to LMA
2530 symbol_overlayed_address(...): Return a "current" address for symbol:
2531 either in VMA or LMA depending on whether
2532 the symbol's section is currently mapped
2535 /* Overlay debugging state: */
2537 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2538 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2540 /* Target vector for refreshing overlay mapped state */
2541 static void simple_overlay_update (struct obj_section
*);
2542 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2544 /* Function: section_is_overlay (SECTION)
2545 Returns true if SECTION has VMA not equal to LMA, ie.
2546 SECTION is loaded at an address different from where it will "run". */
2549 section_is_overlay (asection
*section
)
2551 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2553 if (overlay_debugging
)
2554 if (section
&& section
->lma
!= 0 &&
2555 section
->vma
!= section
->lma
)
2561 /* Function: overlay_invalidate_all (void)
2562 Invalidate the mapped state of all overlay sections (mark it as stale). */
2565 overlay_invalidate_all (void)
2567 struct objfile
*objfile
;
2568 struct obj_section
*sect
;
2570 ALL_OBJSECTIONS (objfile
, sect
)
2571 if (section_is_overlay (sect
->the_bfd_section
))
2572 sect
->ovly_mapped
= -1;
2575 /* Function: overlay_is_mapped (SECTION)
2576 Returns true if section is an overlay, and is currently mapped.
2577 Private: public access is thru function section_is_mapped.
2579 Access to the ovly_mapped flag is restricted to this function, so
2580 that we can do automatic update. If the global flag
2581 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2582 overlay_invalidate_all. If the mapped state of the particular
2583 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2586 overlay_is_mapped (struct obj_section
*osect
)
2588 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2591 switch (overlay_debugging
)
2595 return 0; /* overlay debugging off */
2596 case ovly_auto
: /* overlay debugging automatic */
2597 /* Unles there is a target_overlay_update function,
2598 there's really nothing useful to do here (can't really go auto) */
2599 if (target_overlay_update
)
2601 if (overlay_cache_invalid
)
2603 overlay_invalidate_all ();
2604 overlay_cache_invalid
= 0;
2606 if (osect
->ovly_mapped
== -1)
2607 (*target_overlay_update
) (osect
);
2609 /* fall thru to manual case */
2610 case ovly_on
: /* overlay debugging manual */
2611 return osect
->ovly_mapped
== 1;
2615 /* Function: section_is_mapped
2616 Returns true if section is an overlay, and is currently mapped. */
2619 section_is_mapped (asection
*section
)
2621 struct objfile
*objfile
;
2622 struct obj_section
*osect
;
2624 if (overlay_debugging
)
2625 if (section
&& section_is_overlay (section
))
2626 ALL_OBJSECTIONS (objfile
, osect
)
2627 if (osect
->the_bfd_section
== section
)
2628 return overlay_is_mapped (osect
);
2633 /* Function: pc_in_unmapped_range
2634 If PC falls into the lma range of SECTION, return true, else false. */
2637 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2639 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2643 if (overlay_debugging
)
2644 if (section
&& section_is_overlay (section
))
2646 size
= bfd_get_section_size_before_reloc (section
);
2647 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2653 /* Function: pc_in_mapped_range
2654 If PC falls into the vma range of SECTION, return true, else false. */
2657 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2659 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2663 if (overlay_debugging
)
2664 if (section
&& section_is_overlay (section
))
2666 size
= bfd_get_section_size_before_reloc (section
);
2667 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2674 /* Return true if the mapped ranges of sections A and B overlap, false
2677 sections_overlap (asection
*a
, asection
*b
)
2679 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2681 CORE_ADDR a_start
= a
->vma
;
2682 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
2683 CORE_ADDR b_start
= b
->vma
;
2684 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
2686 return (a_start
< b_end
&& b_start
< a_end
);
2689 /* Function: overlay_unmapped_address (PC, SECTION)
2690 Returns the address corresponding to PC in the unmapped (load) range.
2691 May be the same as PC. */
2694 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2696 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2698 if (overlay_debugging
)
2699 if (section
&& section_is_overlay (section
) &&
2700 pc_in_mapped_range (pc
, section
))
2701 return pc
+ section
->lma
- section
->vma
;
2706 /* Function: overlay_mapped_address (PC, SECTION)
2707 Returns the address corresponding to PC in the mapped (runtime) range.
2708 May be the same as PC. */
2711 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2713 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2715 if (overlay_debugging
)
2716 if (section
&& section_is_overlay (section
) &&
2717 pc_in_unmapped_range (pc
, section
))
2718 return pc
+ section
->vma
- section
->lma
;
2724 /* Function: symbol_overlayed_address
2725 Return one of two addresses (relative to the VMA or to the LMA),
2726 depending on whether the section is mapped or not. */
2729 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2731 if (overlay_debugging
)
2733 /* If the symbol has no section, just return its regular address. */
2736 /* If the symbol's section is not an overlay, just return its address */
2737 if (!section_is_overlay (section
))
2739 /* If the symbol's section is mapped, just return its address */
2740 if (section_is_mapped (section
))
2743 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2744 * then return its LOADED address rather than its vma address!!
2746 return overlay_unmapped_address (address
, section
);
2751 /* Function: find_pc_overlay (PC)
2752 Return the best-match overlay section for PC:
2753 If PC matches a mapped overlay section's VMA, return that section.
2754 Else if PC matches an unmapped section's VMA, return that section.
2755 Else if PC matches an unmapped section's LMA, return that section. */
2758 find_pc_overlay (CORE_ADDR pc
)
2760 struct objfile
*objfile
;
2761 struct obj_section
*osect
, *best_match
= NULL
;
2763 if (overlay_debugging
)
2764 ALL_OBJSECTIONS (objfile
, osect
)
2765 if (section_is_overlay (osect
->the_bfd_section
))
2767 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2769 if (overlay_is_mapped (osect
))
2770 return osect
->the_bfd_section
;
2774 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2777 return best_match
? best_match
->the_bfd_section
: NULL
;
2780 /* Function: find_pc_mapped_section (PC)
2781 If PC falls into the VMA address range of an overlay section that is
2782 currently marked as MAPPED, return that section. Else return NULL. */
2785 find_pc_mapped_section (CORE_ADDR pc
)
2787 struct objfile
*objfile
;
2788 struct obj_section
*osect
;
2790 if (overlay_debugging
)
2791 ALL_OBJSECTIONS (objfile
, osect
)
2792 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2793 overlay_is_mapped (osect
))
2794 return osect
->the_bfd_section
;
2799 /* Function: list_overlays_command
2800 Print a list of mapped sections and their PC ranges */
2803 list_overlays_command (char *args
, int from_tty
)
2806 struct objfile
*objfile
;
2807 struct obj_section
*osect
;
2809 if (overlay_debugging
)
2810 ALL_OBJSECTIONS (objfile
, osect
)
2811 if (overlay_is_mapped (osect
))
2817 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2818 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2819 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2820 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2822 printf_filtered ("Section %s, loaded at ", name
);
2823 print_address_numeric (lma
, 1, gdb_stdout
);
2824 puts_filtered (" - ");
2825 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2826 printf_filtered (", mapped at ");
2827 print_address_numeric (vma
, 1, gdb_stdout
);
2828 puts_filtered (" - ");
2829 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2830 puts_filtered ("\n");
2835 printf_filtered ("No sections are mapped.\n");
2838 /* Function: map_overlay_command
2839 Mark the named section as mapped (ie. residing at its VMA address). */
2842 map_overlay_command (char *args
, int from_tty
)
2844 struct objfile
*objfile
, *objfile2
;
2845 struct obj_section
*sec
, *sec2
;
2848 if (!overlay_debugging
)
2850 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2851 the 'overlay manual' command.");
2853 if (args
== 0 || *args
== 0)
2854 error ("Argument required: name of an overlay section");
2856 /* First, find a section matching the user supplied argument */
2857 ALL_OBJSECTIONS (objfile
, sec
)
2858 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2860 /* Now, check to see if the section is an overlay. */
2861 bfdsec
= sec
->the_bfd_section
;
2862 if (!section_is_overlay (bfdsec
))
2863 continue; /* not an overlay section */
2865 /* Mark the overlay as "mapped" */
2866 sec
->ovly_mapped
= 1;
2868 /* Next, make a pass and unmap any sections that are
2869 overlapped by this new section: */
2870 ALL_OBJSECTIONS (objfile2
, sec2
)
2871 if (sec2
->ovly_mapped
2873 && sec
->the_bfd_section
!= sec2
->the_bfd_section
2874 && sections_overlap (sec
->the_bfd_section
,
2875 sec2
->the_bfd_section
))
2878 printf_filtered ("Note: section %s unmapped by overlap\n",
2879 bfd_section_name (objfile
->obfd
,
2880 sec2
->the_bfd_section
));
2881 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2885 error ("No overlay section called %s", args
);
2888 /* Function: unmap_overlay_command
2889 Mark the overlay section as unmapped
2890 (ie. resident in its LMA address range, rather than the VMA range). */
2893 unmap_overlay_command (char *args
, int from_tty
)
2895 struct objfile
*objfile
;
2896 struct obj_section
*sec
;
2898 if (!overlay_debugging
)
2900 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2901 the 'overlay manual' command.");
2903 if (args
== 0 || *args
== 0)
2904 error ("Argument required: name of an overlay section");
2906 /* First, find a section matching the user supplied argument */
2907 ALL_OBJSECTIONS (objfile
, sec
)
2908 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2910 if (!sec
->ovly_mapped
)
2911 error ("Section %s is not mapped", args
);
2912 sec
->ovly_mapped
= 0;
2915 error ("No overlay section called %s", args
);
2918 /* Function: overlay_auto_command
2919 A utility command to turn on overlay debugging.
2920 Possibly this should be done via a set/show command. */
2923 overlay_auto_command (char *args
, int from_tty
)
2925 overlay_debugging
= ovly_auto
;
2926 enable_overlay_breakpoints ();
2928 printf_filtered ("Automatic overlay debugging enabled.");
2931 /* Function: overlay_manual_command
2932 A utility command to turn on overlay debugging.
2933 Possibly this should be done via a set/show command. */
2936 overlay_manual_command (char *args
, int from_tty
)
2938 overlay_debugging
= ovly_on
;
2939 disable_overlay_breakpoints ();
2941 printf_filtered ("Overlay debugging enabled.");
2944 /* Function: overlay_off_command
2945 A utility command to turn on overlay debugging.
2946 Possibly this should be done via a set/show command. */
2949 overlay_off_command (char *args
, int from_tty
)
2951 overlay_debugging
= ovly_off
;
2952 disable_overlay_breakpoints ();
2954 printf_filtered ("Overlay debugging disabled.");
2958 overlay_load_command (char *args
, int from_tty
)
2960 if (target_overlay_update
)
2961 (*target_overlay_update
) (NULL
);
2963 error ("This target does not know how to read its overlay state.");
2966 /* Function: overlay_command
2967 A place-holder for a mis-typed command */
2969 /* Command list chain containing all defined "overlay" subcommands. */
2970 struct cmd_list_element
*overlaylist
;
2973 overlay_command (char *args
, int from_tty
)
2976 ("\"overlay\" must be followed by the name of an overlay command.\n");
2977 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
2981 /* Target Overlays for the "Simplest" overlay manager:
2983 This is GDB's default target overlay layer. It works with the
2984 minimal overlay manager supplied as an example by Cygnus. The
2985 entry point is via a function pointer "target_overlay_update",
2986 so targets that use a different runtime overlay manager can
2987 substitute their own overlay_update function and take over the
2990 The overlay_update function pokes around in the target's data structures
2991 to see what overlays are mapped, and updates GDB's overlay mapping with
2994 In this simple implementation, the target data structures are as follows:
2995 unsigned _novlys; /# number of overlay sections #/
2996 unsigned _ovly_table[_novlys][4] = {
2997 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2998 {..., ..., ..., ...},
3000 unsigned _novly_regions; /# number of overlay regions #/
3001 unsigned _ovly_region_table[_novly_regions][3] = {
3002 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3005 These functions will attempt to update GDB's mappedness state in the
3006 symbol section table, based on the target's mappedness state.
3008 To do this, we keep a cached copy of the target's _ovly_table, and
3009 attempt to detect when the cached copy is invalidated. The main
3010 entry point is "simple_overlay_update(SECT), which looks up SECT in
3011 the cached table and re-reads only the entry for that section from
3012 the target (whenever possible).
3015 /* Cached, dynamically allocated copies of the target data structures: */
3016 static unsigned (*cache_ovly_table
)[4] = 0;
3018 static unsigned (*cache_ovly_region_table
)[3] = 0;
3020 static unsigned cache_novlys
= 0;
3022 static unsigned cache_novly_regions
= 0;
3024 static CORE_ADDR cache_ovly_table_base
= 0;
3026 static CORE_ADDR cache_ovly_region_table_base
= 0;
3030 VMA
, SIZE
, LMA
, MAPPED
3032 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3034 /* Throw away the cached copy of _ovly_table */
3036 simple_free_overlay_table (void)
3038 if (cache_ovly_table
)
3039 xfree (cache_ovly_table
);
3041 cache_ovly_table
= NULL
;
3042 cache_ovly_table_base
= 0;
3046 /* Throw away the cached copy of _ovly_region_table */
3048 simple_free_overlay_region_table (void)
3050 if (cache_ovly_region_table
)
3051 xfree (cache_ovly_region_table
);
3052 cache_novly_regions
= 0;
3053 cache_ovly_region_table
= NULL
;
3054 cache_ovly_region_table_base
= 0;
3058 /* Read an array of ints from the target into a local buffer.
3059 Convert to host order. int LEN is number of ints */
3061 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3063 /* FIXME (alloca): Not safe if array is very large. */
3064 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3067 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3068 for (i
= 0; i
< len
; i
++)
3069 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3073 /* Find and grab a copy of the target _ovly_table
3074 (and _novlys, which is needed for the table's size) */
3076 simple_read_overlay_table (void)
3078 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3080 simple_free_overlay_table ();
3081 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3084 error ("Error reading inferior's overlay table: "
3085 "couldn't find `_novlys' variable\n"
3086 "in inferior. Use `overlay manual' mode.");
3090 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3091 if (! ovly_table_msym
)
3093 error ("Error reading inferior's overlay table: couldn't find "
3094 "`_ovly_table' array\n"
3095 "in inferior. Use `overlay manual' mode.");
3099 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3101 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3102 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3103 read_target_long_array (cache_ovly_table_base
,
3104 (int *) cache_ovly_table
,
3107 return 1; /* SUCCESS */
3111 /* Find and grab a copy of the target _ovly_region_table
3112 (and _novly_regions, which is needed for the table's size) */
3114 simple_read_overlay_region_table (void)
3116 struct minimal_symbol
*msym
;
3118 simple_free_overlay_region_table ();
3119 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3121 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3123 return 0; /* failure */
3124 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3125 if (cache_ovly_region_table
!= NULL
)
3127 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3130 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3131 read_target_long_array (cache_ovly_region_table_base
,
3132 (int *) cache_ovly_region_table
,
3133 cache_novly_regions
* 3);
3136 return 0; /* failure */
3139 return 0; /* failure */
3140 return 1; /* SUCCESS */
3144 /* Function: simple_overlay_update_1
3145 A helper function for simple_overlay_update. Assuming a cached copy
3146 of _ovly_table exists, look through it to find an entry whose vma,
3147 lma and size match those of OSECT. Re-read the entry and make sure
3148 it still matches OSECT (else the table may no longer be valid).
3149 Set OSECT's mapped state to match the entry. Return: 1 for
3150 success, 0 for failure. */
3153 simple_overlay_update_1 (struct obj_section
*osect
)
3156 bfd
*obfd
= osect
->objfile
->obfd
;
3157 asection
*bsect
= osect
->the_bfd_section
;
3159 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3160 for (i
= 0; i
< cache_novlys
; i
++)
3161 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3162 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3163 /* && cache_ovly_table[i][SIZE] == size */ )
3165 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3166 (int *) cache_ovly_table
[i
], 4);
3167 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3168 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3169 /* && cache_ovly_table[i][SIZE] == size */ )
3171 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3174 else /* Warning! Warning! Target's ovly table has changed! */
3180 /* Function: simple_overlay_update
3181 If OSECT is NULL, then update all sections' mapped state
3182 (after re-reading the entire target _ovly_table).
3183 If OSECT is non-NULL, then try to find a matching entry in the
3184 cached ovly_table and update only OSECT's mapped state.
3185 If a cached entry can't be found or the cache isn't valid, then
3186 re-read the entire cache, and go ahead and update all sections. */
3189 simple_overlay_update (struct obj_section
*osect
)
3191 struct objfile
*objfile
;
3193 /* Were we given an osect to look up? NULL means do all of them. */
3195 /* Have we got a cached copy of the target's overlay table? */
3196 if (cache_ovly_table
!= NULL
)
3197 /* Does its cached location match what's currently in the symtab? */
3198 if (cache_ovly_table_base
==
3199 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3200 /* Then go ahead and try to look up this single section in the cache */
3201 if (simple_overlay_update_1 (osect
))
3202 /* Found it! We're done. */
3205 /* Cached table no good: need to read the entire table anew.
3206 Or else we want all the sections, in which case it's actually
3207 more efficient to read the whole table in one block anyway. */
3209 if (! simple_read_overlay_table ())
3212 /* Now may as well update all sections, even if only one was requested. */
3213 ALL_OBJSECTIONS (objfile
, osect
)
3214 if (section_is_overlay (osect
->the_bfd_section
))
3217 bfd
*obfd
= osect
->objfile
->obfd
;
3218 asection
*bsect
= osect
->the_bfd_section
;
3220 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3221 for (i
= 0; i
< cache_novlys
; i
++)
3222 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3223 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3224 /* && cache_ovly_table[i][SIZE] == size */ )
3225 { /* obj_section matches i'th entry in ovly_table */
3226 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3227 break; /* finished with inner for loop: break out */
3234 _initialize_symfile (void)
3236 struct cmd_list_element
*c
;
3238 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3239 "Load symbol table from executable file FILE.\n\
3240 The `file' command can also load symbol tables, as well as setting the file\n\
3241 to execute.", &cmdlist
);
3242 set_cmd_completer (c
, filename_completer
);
3244 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3245 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3246 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3247 ADDR is the starting address of the file's text.\n\
3248 The optional arguments are section-name section-address pairs and\n\
3249 should be specified if the data and bss segments are not contiguous\n\
3250 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3252 set_cmd_completer (c
, filename_completer
);
3254 c
= add_cmd ("add-shared-symbol-files", class_files
,
3255 add_shared_symbol_files_command
,
3256 "Load the symbols from shared objects in the dynamic linker's link map.",
3258 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3261 c
= add_cmd ("load", class_files
, load_command
,
3262 "Dynamically load FILE into the running program, and record its symbols\n\
3263 for access from GDB.", &cmdlist
);
3264 set_cmd_completer (c
, filename_completer
);
3267 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3268 (char *) &symbol_reloading
,
3269 "Set dynamic symbol table reloading multiple times in one run.",
3273 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3274 "Commands for debugging overlays.", &overlaylist
,
3275 "overlay ", 0, &cmdlist
);
3277 add_com_alias ("ovly", "overlay", class_alias
, 1);
3278 add_com_alias ("ov", "overlay", class_alias
, 1);
3280 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3281 "Assert that an overlay section is mapped.", &overlaylist
);
3283 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3284 "Assert that an overlay section is unmapped.", &overlaylist
);
3286 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3287 "List mappings of overlay sections.", &overlaylist
);
3289 add_cmd ("manual", class_support
, overlay_manual_command
,
3290 "Enable overlay debugging.", &overlaylist
);
3291 add_cmd ("off", class_support
, overlay_off_command
,
3292 "Disable overlay debugging.", &overlaylist
);
3293 add_cmd ("auto", class_support
, overlay_auto_command
,
3294 "Enable automatic overlay debugging.", &overlaylist
);
3295 add_cmd ("load-target", class_support
, overlay_load_command
,
3296 "Read the overlay mapping state from the target.", &overlaylist
);
3298 /* Filename extension to source language lookup table: */
3299 init_filename_language_table ();
3300 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3302 "Set mapping between filename extension and source language.\n\
3303 Usage: set extension-language .foo bar",
3305 set_cmd_cfunc (c
, set_ext_lang_command
);
3307 add_info ("extensions", info_ext_lang_command
,
3308 "All filename extensions associated with a source language.");
3311 (add_set_cmd ("download-write-size", class_obscure
,
3312 var_integer
, (char *) &download_write_size
,
3313 "Set the write size used when downloading a program.\n"
3314 "Only used when downloading a program onto a remote\n"
3315 "target. Specify zero, or a negative value, to disable\n"
3316 "blocked writes. The actual size of each transfer is also\n"
3317 "limited by the size of the target packet and the memory\n"