1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
36 #include "breakpoint.h"
38 #include "complaints.h"
40 #include "inferior.h" /* for write_pc */
41 #include "gdb-stabs.h"
42 #include "gdb_obstack.h"
43 #include "completer.h"
46 #include <sys/types.h>
48 #include "gdb_string.h"
59 /* Some HP-UX related globals to clear when a new "main"
60 symbol file is loaded. HP-specific. */
62 extern int hp_som_som_object_present
;
63 extern int hp_cxx_exception_support_initialized
;
64 #define RESET_HP_UX_GLOBALS() do {\
65 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
66 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
70 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
71 void (*show_load_progress
) (const char *section
,
72 unsigned long section_sent
,
73 unsigned long section_size
,
74 unsigned long total_sent
,
75 unsigned long total_size
);
76 void (*pre_add_symbol_hook
) (char *);
77 void (*post_add_symbol_hook
) (void);
78 void (*target_new_objfile_hook
) (struct objfile
*);
80 static void clear_symtab_users_cleanup (void *ignore
);
82 /* Global variables owned by this file */
83 int readnow_symbol_files
; /* Read full symbols immediately */
85 /* External variables and functions referenced. */
87 extern void report_transfer_performance (unsigned long, time_t, time_t);
89 /* Functions this file defines */
92 static int simple_read_overlay_region_table (void);
93 static void simple_free_overlay_region_table (void);
96 static void set_initial_language (void);
98 static void load_command (char *, int);
100 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
102 static void add_symbol_file_command (char *, int);
104 static void add_shared_symbol_files_command (char *, int);
106 static void cashier_psymtab (struct partial_symtab
*);
108 bfd
*symfile_bfd_open (char *);
110 int get_section_index (struct objfile
*, char *);
112 static void find_sym_fns (struct objfile
*);
114 static void decrement_reading_symtab (void *);
116 static void overlay_invalidate_all (void);
118 static int overlay_is_mapped (struct obj_section
*);
120 void list_overlays_command (char *, int);
122 void map_overlay_command (char *, int);
124 void unmap_overlay_command (char *, int);
126 static void overlay_auto_command (char *, int);
128 static void overlay_manual_command (char *, int);
130 static void overlay_off_command (char *, int);
132 static void overlay_load_command (char *, int);
134 static void overlay_command (char *, int);
136 static void simple_free_overlay_table (void);
138 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
140 static int simple_read_overlay_table (void);
142 static int simple_overlay_update_1 (struct obj_section
*);
144 static void add_filename_language (char *ext
, enum language lang
);
146 static void set_ext_lang_command (char *args
, int from_tty
);
148 static void info_ext_lang_command (char *args
, int from_tty
);
150 static void init_filename_language_table (void);
152 void _initialize_symfile (void);
154 /* List of all available sym_fns. On gdb startup, each object file reader
155 calls add_symtab_fns() to register information on each format it is
158 static struct sym_fns
*symtab_fns
= NULL
;
160 /* Flag for whether user will be reloading symbols multiple times.
161 Defaults to ON for VxWorks, otherwise OFF. */
163 #ifdef SYMBOL_RELOADING_DEFAULT
164 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
166 int symbol_reloading
= 0;
169 /* If non-zero, shared library symbols will be added automatically
170 when the inferior is created, new libraries are loaded, or when
171 attaching to the inferior. This is almost always what users will
172 want to have happen; but for very large programs, the startup time
173 will be excessive, and so if this is a problem, the user can clear
174 this flag and then add the shared library symbols as needed. Note
175 that there is a potential for confusion, since if the shared
176 library symbols are not loaded, commands like "info fun" will *not*
177 report all the functions that are actually present. */
179 int auto_solib_add
= 1;
181 /* For systems that support it, a threshold size in megabytes. If
182 automatically adding a new library's symbol table to those already
183 known to the debugger would cause the total shared library symbol
184 size to exceed this threshhold, then the shlib's symbols are not
185 added. The threshold is ignored if the user explicitly asks for a
186 shlib to be added, such as when using the "sharedlibrary"
189 int auto_solib_limit
;
192 /* Since this function is called from within qsort, in an ANSI environment
193 it must conform to the prototype for qsort, which specifies that the
194 comparison function takes two "void *" pointers. */
197 compare_symbols (const void *s1p
, const void *s2p
)
199 register struct symbol
**s1
, **s2
;
201 s1
= (struct symbol
**) s1p
;
202 s2
= (struct symbol
**) s2p
;
203 return (strcmp (SYMBOL_SOURCE_NAME (*s1
), SYMBOL_SOURCE_NAME (*s2
)));
210 compare_psymbols -- compare two partial symbols by name
214 Given pointers to pointers to two partial symbol table entries,
215 compare them by name and return -N, 0, or +N (ala strcmp).
216 Typically used by sorting routines like qsort().
220 Does direct compare of first two characters before punting
221 and passing to strcmp for longer compares. Note that the
222 original version had a bug whereby two null strings or two
223 identically named one character strings would return the
224 comparison of memory following the null byte.
229 compare_psymbols (const void *s1p
, const void *s2p
)
231 register struct partial_symbol
**s1
, **s2
;
232 register char *st1
, *st2
;
234 s1
= (struct partial_symbol
**) s1p
;
235 s2
= (struct partial_symbol
**) s2p
;
236 st1
= SYMBOL_SOURCE_NAME (*s1
);
237 st2
= SYMBOL_SOURCE_NAME (*s2
);
240 if ((st1
[0] - st2
[0]) || !st1
[0])
242 return (st1
[0] - st2
[0]);
244 else if ((st1
[1] - st2
[1]) || !st1
[1])
246 return (st1
[1] - st2
[1]);
250 return (strcmp (st1
, st2
));
255 sort_pst_symbols (struct partial_symtab
*pst
)
257 /* Sort the global list; don't sort the static list */
259 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
260 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
264 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
267 sort_block_syms (register struct block
*b
)
269 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
270 sizeof (struct symbol
*), compare_symbols
);
273 /* Call sort_symtab_syms to sort alphabetically
274 the symbols of each block of one symtab. */
277 sort_symtab_syms (register struct symtab
*s
)
279 register struct blockvector
*bv
;
282 register struct block
*b
;
286 bv
= BLOCKVECTOR (s
);
287 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
288 for (i
= 0; i
< nbl
; i
++)
290 b
= BLOCKVECTOR_BLOCK (bv
, i
);
291 if (BLOCK_SHOULD_SORT (b
))
296 /* Make a null terminated copy of the string at PTR with SIZE characters in
297 the obstack pointed to by OBSTACKP . Returns the address of the copy.
298 Note that the string at PTR does not have to be null terminated, I.E. it
299 may be part of a larger string and we are only saving a substring. */
302 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
304 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
305 /* Open-coded memcpy--saves function call time. These strings are usually
306 short. FIXME: Is this really still true with a compiler that can
309 register const char *p1
= ptr
;
310 register char *p2
= p
;
311 const char *end
= ptr
+ size
;
319 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
320 in the obstack pointed to by OBSTACKP. */
323 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
326 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
327 register char *val
= (char *) obstack_alloc (obstackp
, len
);
334 /* True if we are nested inside psymtab_to_symtab. */
336 int currently_reading_symtab
= 0;
339 decrement_reading_symtab (void *dummy
)
341 currently_reading_symtab
--;
344 /* Get the symbol table that corresponds to a partial_symtab.
345 This is fast after the first time you do it. In fact, there
346 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
350 psymtab_to_symtab (register struct partial_symtab
*pst
)
352 /* If it's been looked up before, return it. */
356 /* If it has not yet been read in, read it. */
359 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
360 currently_reading_symtab
++;
361 (*pst
->read_symtab
) (pst
);
362 do_cleanups (back_to
);
368 /* Initialize entry point information for this objfile. */
371 init_entry_point_info (struct objfile
*objfile
)
373 /* Save startup file's range of PC addresses to help blockframe.c
374 decide where the bottom of the stack is. */
376 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
378 /* Executable file -- record its entry point so we'll recognize
379 the startup file because it contains the entry point. */
380 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
384 /* Examination of non-executable.o files. Short-circuit this stuff. */
385 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
387 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
388 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
389 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
390 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
391 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
392 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
395 /* Get current entry point address. */
398 entry_point_address (void)
400 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
403 /* Remember the lowest-addressed loadable section we've seen.
404 This function is called via bfd_map_over_sections.
406 In case of equal vmas, the section with the largest size becomes the
407 lowest-addressed loadable section.
409 If the vmas and sizes are equal, the last section is considered the
410 lowest-addressed loadable section. */
413 find_lowest_section (bfd
*abfd
, asection
*sect
, PTR obj
)
415 asection
**lowest
= (asection
**) obj
;
417 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
420 *lowest
= sect
; /* First loadable section */
421 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
422 *lowest
= sect
; /* A lower loadable section */
423 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
424 && (bfd_section_size (abfd
, (*lowest
))
425 <= bfd_section_size (abfd
, sect
)))
430 /* Build (allocate and populate) a section_addr_info struct from
431 an existing section table. */
433 extern struct section_addr_info
*
434 build_section_addr_info_from_section_table (const struct section_table
*start
,
435 const struct section_table
*end
)
437 struct section_addr_info
*sap
;
438 const struct section_table
*stp
;
441 sap
= xmalloc (sizeof (struct section_addr_info
));
442 memset (sap
, 0, sizeof (struct section_addr_info
));
444 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
446 if (bfd_get_section_flags (stp
->bfd
,
447 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
448 && oidx
< MAX_SECTIONS
)
450 sap
->other
[oidx
].addr
= stp
->addr
;
451 sap
->other
[oidx
].name
452 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
453 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
462 /* Free all memory allocated by build_section_addr_info_from_section_table. */
465 free_section_addr_info (struct section_addr_info
*sap
)
469 for (idx
= 0; idx
< MAX_SECTIONS
; idx
++)
470 if (sap
->other
[idx
].name
)
471 xfree (sap
->other
[idx
].name
);
476 /* Initialize OBJFILE's sect_index_* members. */
478 init_objfile_sect_indices (struct objfile
*objfile
)
483 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
485 objfile
->sect_index_text
= sect
->index
;
487 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
489 objfile
->sect_index_data
= sect
->index
;
491 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
493 objfile
->sect_index_bss
= sect
->index
;
495 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
497 objfile
->sect_index_rodata
= sect
->index
;
499 /* This is where things get really weird... We MUST have valid
500 indices for the various sect_index_* members or gdb will abort.
501 So if for example, there is no ".text" section, we have to
502 accomodate that. Except when explicitly adding symbol files at
503 some address, section_offsets contains nothing but zeros, so it
504 doesn't matter which slot in section_offsets the individual
505 sect_index_* members index into. So if they are all zero, it is
506 safe to just point all the currently uninitialized indices to the
509 for (i
= 0; i
< objfile
->num_sections
; i
++)
511 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
516 if (i
== objfile
->num_sections
)
518 if (objfile
->sect_index_text
== -1)
519 objfile
->sect_index_text
= 0;
520 if (objfile
->sect_index_data
== -1)
521 objfile
->sect_index_data
= 0;
522 if (objfile
->sect_index_bss
== -1)
523 objfile
->sect_index_bss
= 0;
524 if (objfile
->sect_index_rodata
== -1)
525 objfile
->sect_index_rodata
= 0;
530 /* Parse the user's idea of an offset for dynamic linking, into our idea
531 of how to represent it for fast symbol reading. This is the default
532 version of the sym_fns.sym_offsets function for symbol readers that
533 don't need to do anything special. It allocates a section_offsets table
534 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
537 default_symfile_offsets (struct objfile
*objfile
,
538 struct section_addr_info
*addrs
)
542 objfile
->num_sections
= SECT_OFF_MAX
;
543 objfile
->section_offsets
= (struct section_offsets
*)
544 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
545 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
547 /* Now calculate offsets for section that were specified by the
549 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
551 struct other_sections
*osp
;
553 osp
= &addrs
->other
[i
] ;
557 /* Record all sections in offsets */
558 /* The section_offsets in the objfile are here filled in using
560 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
563 /* Remember the bfd indexes for the .text, .data, .bss and
565 init_objfile_sect_indices (objfile
);
569 /* Process a symbol file, as either the main file or as a dynamically
572 OBJFILE is where the symbols are to be read from.
574 ADDR is the address where the text segment was loaded, unless the
575 objfile is the main symbol file, in which case it is zero.
577 MAINLINE is nonzero if this is the main symbol file, or zero if
578 it's an extra symbol file such as dynamically loaded code.
580 VERBO is nonzero if the caller has printed a verbose message about
581 the symbol reading (and complaints can be more terse about it). */
584 syms_from_objfile (struct objfile
*objfile
, struct section_addr_info
*addrs
,
585 int mainline
, int verbo
)
587 asection
*lower_sect
;
589 CORE_ADDR lower_offset
;
590 struct section_addr_info local_addr
;
591 struct cleanup
*old_chain
;
594 /* If ADDRS is NULL, initialize the local section_addr_info struct and
595 point ADDRS to it. We now establish the convention that an addr of
596 zero means no load address was specified. */
600 memset (&local_addr
, 0, sizeof (local_addr
));
604 init_entry_point_info (objfile
);
605 find_sym_fns (objfile
);
607 if (objfile
->sf
== NULL
)
608 return; /* No symbols. */
610 /* Make sure that partially constructed symbol tables will be cleaned up
611 if an error occurs during symbol reading. */
612 old_chain
= make_cleanup_free_objfile (objfile
);
616 /* We will modify the main symbol table, make sure that all its users
617 will be cleaned up if an error occurs during symbol reading. */
618 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
620 /* Since no error yet, throw away the old symbol table. */
622 if (symfile_objfile
!= NULL
)
624 free_objfile (symfile_objfile
);
625 symfile_objfile
= NULL
;
628 /* Currently we keep symbols from the add-symbol-file command.
629 If the user wants to get rid of them, they should do "symbol-file"
630 without arguments first. Not sure this is the best behavior
633 (*objfile
->sf
->sym_new_init
) (objfile
);
636 /* Convert addr into an offset rather than an absolute address.
637 We find the lowest address of a loaded segment in the objfile,
638 and assume that <addr> is where that got loaded.
640 We no longer warn if the lowest section is not a text segment (as
641 happens for the PA64 port. */
644 /* Find lowest loadable section to be used as starting point for
645 continguous sections. FIXME!! won't work without call to find
646 .text first, but this assumes text is lowest section. */
647 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
648 if (lower_sect
== NULL
)
649 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
651 if (lower_sect
== NULL
)
652 warning ("no loadable sections found in added symbol-file %s",
655 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
656 warning ("Lowest section in %s is %s at %s",
658 bfd_section_name (objfile
->obfd
, lower_sect
),
659 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
660 if (lower_sect
!= NULL
)
661 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
665 /* Calculate offsets for the loadable sections.
666 FIXME! Sections must be in order of increasing loadable section
667 so that contiguous sections can use the lower-offset!!!
669 Adjust offsets if the segments are not contiguous.
670 If the section is contiguous, its offset should be set to
671 the offset of the highest loadable section lower than it
672 (the loadable section directly below it in memory).
673 this_offset = lower_offset = lower_addr - lower_orig_addr */
675 /* Calculate offsets for sections. */
676 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
678 if (addrs
->other
[i
].addr
!= 0)
680 sect
= bfd_get_section_by_name (objfile
->obfd
,
681 addrs
->other
[i
].name
);
685 -= bfd_section_vma (objfile
->obfd
, sect
);
686 lower_offset
= addrs
->other
[i
].addr
;
687 /* This is the index used by BFD. */
688 addrs
->other
[i
].sectindex
= sect
->index
;
692 warning ("section %s not found in %s", addrs
->other
[i
].name
,
694 addrs
->other
[i
].addr
= 0;
698 addrs
->other
[i
].addr
= lower_offset
;
702 /* Initialize symbol reading routines for this objfile, allow complaints to
703 appear for this new file, and record how verbose to be, then do the
704 initial symbol reading for this file. */
706 (*objfile
->sf
->sym_init
) (objfile
);
707 clear_complaints (&symfile_complaints
, 1, verbo
);
709 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
711 #ifndef IBM6000_TARGET
712 /* This is a SVR4/SunOS specific hack, I think. In any event, it
713 screws RS/6000. sym_offsets should be doing this sort of thing,
714 because it knows the mapping between bfd sections and
716 /* This is a hack. As far as I can tell, section offsets are not
717 target dependent. They are all set to addr with a couple of
718 exceptions. The exceptions are sysvr4 shared libraries, whose
719 offsets are kept in solib structures anyway and rs6000 xcoff
720 which handles shared libraries in a completely unique way.
722 Section offsets are built similarly, except that they are built
723 by adding addr in all cases because there is no clear mapping
724 from section_offsets into actual sections. Note that solib.c
725 has a different algorithm for finding section offsets.
727 These should probably all be collapsed into some target
728 independent form of shared library support. FIXME. */
732 struct obj_section
*s
;
734 /* Map section offsets in "addr" back to the object's
735 sections by comparing the section names with bfd's
736 section names. Then adjust the section address by
737 the offset. */ /* for gdb/13815 */
739 ALL_OBJFILE_OSECTIONS (objfile
, s
)
741 CORE_ADDR s_addr
= 0;
745 !s_addr
&& i
< MAX_SECTIONS
&& addrs
->other
[i
].name
;
747 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
749 addrs
->other
[i
].name
) == 0)
750 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
752 s
->addr
-= s
->offset
;
754 s
->endaddr
-= s
->offset
;
755 s
->endaddr
+= s_addr
;
759 #endif /* not IBM6000_TARGET */
761 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
763 if (!have_partial_symbols () && !have_full_symbols ())
766 printf_filtered ("(no debugging symbols found)...");
770 /* Don't allow char * to have a typename (else would get caddr_t).
771 Ditto void *. FIXME: Check whether this is now done by all the
772 symbol readers themselves (many of them now do), and if so remove
775 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
776 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
778 /* Mark the objfile has having had initial symbol read attempted. Note
779 that this does not mean we found any symbols... */
781 objfile
->flags
|= OBJF_SYMS
;
783 /* Discard cleanups as symbol reading was successful. */
785 discard_cleanups (old_chain
);
787 /* Call this after reading in a new symbol table to give target
788 dependent code a crack at the new symbols. For instance, this
789 could be used to update the values of target-specific symbols GDB
790 needs to keep track of (such as _sigtramp, or whatever). */
792 TARGET_SYMFILE_POSTREAD (objfile
);
795 /* Perform required actions after either reading in the initial
796 symbols for a new objfile, or mapping in the symbols from a reusable
800 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
803 /* If this is the main symbol file we have to clean up all users of the
804 old main symbol file. Otherwise it is sufficient to fixup all the
805 breakpoints that may have been redefined by this symbol file. */
808 /* OK, make it the "real" symbol file. */
809 symfile_objfile
= objfile
;
811 clear_symtab_users ();
815 breakpoint_re_set ();
818 /* We're done reading the symbol file; finish off complaints. */
819 clear_complaints (&symfile_complaints
, 0, verbo
);
822 /* Process a symbol file, as either the main file or as a dynamically
825 NAME is the file name (which will be tilde-expanded and made
826 absolute herein) (but we don't free or modify NAME itself).
827 FROM_TTY says how verbose to be. MAINLINE specifies whether this
828 is the main symbol file, or whether it's an extra symbol file such
829 as dynamically loaded code. If !mainline, ADDR is the address
830 where the text segment was loaded.
832 Upon success, returns a pointer to the objfile that was added.
833 Upon failure, jumps back to command level (never returns). */
836 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
837 int mainline
, int flags
)
839 struct objfile
*objfile
;
840 struct partial_symtab
*psymtab
;
843 /* Open a bfd for the file, and give user a chance to burp if we'd be
844 interactively wiping out any existing symbols. */
846 abfd
= symfile_bfd_open (name
);
848 if ((have_full_symbols () || have_partial_symbols ())
851 && !query ("Load new symbol table from \"%s\"? ", name
))
852 error ("Not confirmed.");
854 objfile
= allocate_objfile (abfd
, flags
);
856 /* If the objfile uses a mapped symbol file, and we have a psymtab for
857 it, then skip reading any symbols at this time. */
859 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
861 /* We mapped in an existing symbol table file that already has had
862 initial symbol reading performed, so we can skip that part. Notify
863 the user that instead of reading the symbols, they have been mapped.
865 if (from_tty
|| info_verbose
)
867 printf_filtered ("Mapped symbols for %s...", name
);
869 gdb_flush (gdb_stdout
);
871 init_entry_point_info (objfile
);
872 find_sym_fns (objfile
);
876 /* We either created a new mapped symbol table, mapped an existing
877 symbol table file which has not had initial symbol reading
878 performed, or need to read an unmapped symbol table. */
879 if (from_tty
|| info_verbose
)
881 if (pre_add_symbol_hook
)
882 pre_add_symbol_hook (name
);
885 printf_filtered ("Reading symbols from %s...", name
);
887 gdb_flush (gdb_stdout
);
890 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
893 /* We now have at least a partial symbol table. Check to see if the
894 user requested that all symbols be read on initial access via either
895 the gdb startup command line or on a per symbol file basis. Expand
896 all partial symbol tables for this objfile if so. */
898 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
900 if (from_tty
|| info_verbose
)
902 printf_filtered ("expanding to full symbols...");
904 gdb_flush (gdb_stdout
);
907 for (psymtab
= objfile
->psymtabs
;
909 psymtab
= psymtab
->next
)
911 psymtab_to_symtab (psymtab
);
915 if (from_tty
|| info_verbose
)
917 if (post_add_symbol_hook
)
918 post_add_symbol_hook ();
921 printf_filtered ("done.\n");
925 /* We print some messages regardless of whether 'from_tty ||
926 info_verbose' is true, so make sure they go out at the right
928 gdb_flush (gdb_stdout
);
930 if (objfile
->sf
== NULL
)
931 return objfile
; /* No symbols. */
933 new_symfile_objfile (objfile
, mainline
, from_tty
);
935 if (target_new_objfile_hook
)
936 target_new_objfile_hook (objfile
);
941 /* Call symbol_file_add() with default values and update whatever is
942 affected by the loading of a new main().
943 Used when the file is supplied in the gdb command line
944 and by some targets with special loading requirements.
945 The auxiliary function, symbol_file_add_main_1(), has the flags
946 argument for the switches that can only be specified in the symbol_file
950 symbol_file_add_main (char *args
, int from_tty
)
952 symbol_file_add_main_1 (args
, from_tty
, 0);
956 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
958 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
961 RESET_HP_UX_GLOBALS ();
964 /* Getting new symbols may change our opinion about
965 what is frameless. */
966 reinit_frame_cache ();
968 set_initial_language ();
972 symbol_file_clear (int from_tty
)
974 if ((have_full_symbols () || have_partial_symbols ())
976 && !query ("Discard symbol table from `%s'? ",
977 symfile_objfile
->name
))
978 error ("Not confirmed.");
979 free_all_objfiles ();
981 /* solib descriptors may have handles to objfiles. Since their
982 storage has just been released, we'd better wipe the solib
985 #if defined(SOLIB_RESTART)
989 symfile_objfile
= NULL
;
991 printf_unfiltered ("No symbol file now.\n");
993 RESET_HP_UX_GLOBALS ();
997 /* This is the symbol-file command. Read the file, analyze its
998 symbols, and add a struct symtab to a symtab list. The syntax of
999 the command is rather bizarre--(1) buildargv implements various
1000 quoting conventions which are undocumented and have little or
1001 nothing in common with the way things are quoted (or not quoted)
1002 elsewhere in GDB, (2) options are used, which are not generally
1003 used in GDB (perhaps "set mapped on", "set readnow on" would be
1004 better), (3) the order of options matters, which is contrary to GNU
1005 conventions (because it is confusing and inconvenient). */
1006 /* Note: ezannoni 2000-04-17. This function used to have support for
1007 rombug (see remote-os9k.c). It consisted of a call to target_link()
1008 (target.c) to get the address of the text segment from the target,
1009 and pass that to symbol_file_add(). This is no longer supported. */
1012 symbol_file_command (char *args
, int from_tty
)
1016 struct cleanup
*cleanups
;
1017 int flags
= OBJF_USERLOADED
;
1023 symbol_file_clear (from_tty
);
1027 if ((argv
= buildargv (args
)) == NULL
)
1031 cleanups
= make_cleanup_freeargv (argv
);
1032 while (*argv
!= NULL
)
1034 if (STREQ (*argv
, "-mapped"))
1035 flags
|= OBJF_MAPPED
;
1037 if (STREQ (*argv
, "-readnow"))
1038 flags
|= OBJF_READNOW
;
1041 error ("unknown option `%s'", *argv
);
1046 symbol_file_add_main_1 (name
, from_tty
, flags
);
1053 error ("no symbol file name was specified");
1055 do_cleanups (cleanups
);
1059 /* Set the initial language.
1061 A better solution would be to record the language in the psymtab when reading
1062 partial symbols, and then use it (if known) to set the language. This would
1063 be a win for formats that encode the language in an easily discoverable place,
1064 such as DWARF. For stabs, we can jump through hoops looking for specially
1065 named symbols or try to intuit the language from the specific type of stabs
1066 we find, but we can't do that until later when we read in full symbols.
1070 set_initial_language (void)
1072 struct partial_symtab
*pst
;
1073 enum language lang
= language_unknown
;
1075 pst
= find_main_psymtab ();
1078 if (pst
->filename
!= NULL
)
1080 lang
= deduce_language_from_filename (pst
->filename
);
1082 if (lang
== language_unknown
)
1084 /* Make C the default language */
1087 set_language (lang
);
1088 expected_language
= current_language
; /* Don't warn the user */
1092 /* Open file specified by NAME and hand it off to BFD for preliminary
1093 analysis. Result is a newly initialized bfd *, which includes a newly
1094 malloc'd` copy of NAME (tilde-expanded and made absolute).
1095 In case of trouble, error() is called. */
1098 symfile_bfd_open (char *name
)
1102 char *absolute_name
;
1106 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1108 /* Look down path for it, allocate 2nd new malloc'd copy. */
1109 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1110 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1113 char *exename
= alloca (strlen (name
) + 5);
1114 strcat (strcpy (exename
, name
), ".exe");
1115 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1121 make_cleanup (xfree
, name
);
1122 perror_with_name (name
);
1124 xfree (name
); /* Free 1st new malloc'd copy */
1125 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1126 /* It'll be freed in free_objfile(). */
1128 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1132 make_cleanup (xfree
, name
);
1133 error ("\"%s\": can't open to read symbols: %s.", name
,
1134 bfd_errmsg (bfd_get_error ()));
1136 sym_bfd
->cacheable
= 1;
1138 if (!bfd_check_format (sym_bfd
, bfd_object
))
1140 /* FIXME: should be checking for errors from bfd_close (for one thing,
1141 on error it does not free all the storage associated with the
1143 bfd_close (sym_bfd
); /* This also closes desc */
1144 make_cleanup (xfree
, name
);
1145 error ("\"%s\": can't read symbols: %s.", name
,
1146 bfd_errmsg (bfd_get_error ()));
1151 /* Return the section index for the given section name. Return -1 if
1152 the section was not found. */
1154 get_section_index (struct objfile
*objfile
, char *section_name
)
1156 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1163 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1164 startup by the _initialize routine in each object file format reader,
1165 to register information about each format the the reader is prepared
1169 add_symtab_fns (struct sym_fns
*sf
)
1171 sf
->next
= symtab_fns
;
1176 /* Initialize to read symbols from the symbol file sym_bfd. It either
1177 returns or calls error(). The result is an initialized struct sym_fns
1178 in the objfile structure, that contains cached information about the
1182 find_sym_fns (struct objfile
*objfile
)
1185 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1186 char *our_target
= bfd_get_target (objfile
->obfd
);
1188 if (our_flavour
== bfd_target_srec_flavour
1189 || our_flavour
== bfd_target_ihex_flavour
1190 || our_flavour
== bfd_target_tekhex_flavour
)
1191 return; /* No symbols. */
1193 /* Special kludge for apollo. See dstread.c. */
1194 if (STREQN (our_target
, "apollo", 6))
1195 our_flavour
= (enum bfd_flavour
) -2;
1197 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1199 if (our_flavour
== sf
->sym_flavour
)
1205 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1206 bfd_get_target (objfile
->obfd
));
1209 /* This function runs the load command of our current target. */
1212 load_command (char *arg
, int from_tty
)
1215 arg
= get_exec_file (1);
1216 target_load (arg
, from_tty
);
1218 /* After re-loading the executable, we don't really know which
1219 overlays are mapped any more. */
1220 overlay_cache_invalid
= 1;
1223 /* This version of "load" should be usable for any target. Currently
1224 it is just used for remote targets, not inftarg.c or core files,
1225 on the theory that only in that case is it useful.
1227 Avoiding xmodem and the like seems like a win (a) because we don't have
1228 to worry about finding it, and (b) On VMS, fork() is very slow and so
1229 we don't want to run a subprocess. On the other hand, I'm not sure how
1230 performance compares. */
1232 static int download_write_size
= 512;
1233 static int validate_download
= 0;
1235 /* Callback service function for generic_load (bfd_map_over_sections). */
1238 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1240 bfd_size_type
*sum
= data
;
1242 *sum
+= bfd_get_section_size_before_reloc (asec
);
1245 /* Opaque data for load_section_callback. */
1246 struct load_section_data
{
1247 unsigned long load_offset
;
1248 unsigned long write_count
;
1249 unsigned long data_count
;
1250 bfd_size_type total_size
;
1253 /* Callback service function for generic_load (bfd_map_over_sections). */
1256 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1258 struct load_section_data
*args
= data
;
1260 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1262 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1266 struct cleanup
*old_chain
;
1267 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1268 bfd_size_type block_size
;
1270 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1273 if (download_write_size
> 0 && size
> download_write_size
)
1274 block_size
= download_write_size
;
1278 buffer
= xmalloc (size
);
1279 old_chain
= make_cleanup (xfree
, buffer
);
1281 /* Is this really necessary? I guess it gives the user something
1282 to look at during a long download. */
1283 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1284 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1286 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1292 bfd_size_type this_transfer
= size
- sent
;
1294 if (this_transfer
>= block_size
)
1295 this_transfer
= block_size
;
1296 len
= target_write_memory_partial (lma
, buffer
,
1297 this_transfer
, &err
);
1300 if (validate_download
)
1302 /* Broken memories and broken monitors manifest
1303 themselves here when bring new computers to
1304 life. This doubles already slow downloads. */
1305 /* NOTE: cagney/1999-10-18: A more efficient
1306 implementation might add a verify_memory()
1307 method to the target vector and then use
1308 that. remote.c could implement that method
1309 using the ``qCRC'' packet. */
1310 char *check
= xmalloc (len
);
1311 struct cleanup
*verify_cleanups
=
1312 make_cleanup (xfree
, check
);
1314 if (target_read_memory (lma
, check
, len
) != 0)
1315 error ("Download verify read failed at 0x%s",
1317 if (memcmp (buffer
, check
, len
) != 0)
1318 error ("Download verify compare failed at 0x%s",
1320 do_cleanups (verify_cleanups
);
1322 args
->data_count
+= len
;
1325 args
->write_count
+= 1;
1328 || (ui_load_progress_hook
!= NULL
1329 && ui_load_progress_hook (sect_name
, sent
)))
1330 error ("Canceled the download");
1332 if (show_load_progress
!= NULL
)
1333 show_load_progress (sect_name
, sent
, size
,
1334 args
->data_count
, args
->total_size
);
1336 while (sent
< size
);
1339 error ("Memory access error while loading section %s.", sect_name
);
1341 do_cleanups (old_chain
);
1347 generic_load (char *args
, int from_tty
)
1351 time_t start_time
, end_time
; /* Start and end times of download */
1353 struct cleanup
*old_cleanups
;
1355 struct load_section_data cbdata
;
1358 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1359 cbdata
.write_count
= 0; /* Number of writes needed. */
1360 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1361 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1363 /* Parse the input argument - the user can specify a load offset as
1364 a second argument. */
1365 filename
= xmalloc (strlen (args
) + 1);
1366 old_cleanups
= make_cleanup (xfree
, filename
);
1367 strcpy (filename
, args
);
1368 offptr
= strchr (filename
, ' ');
1373 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1374 if (offptr
== endptr
)
1375 error ("Invalid download offset:%s\n", offptr
);
1379 cbdata
.load_offset
= 0;
1381 /* Open the file for loading. */
1382 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1383 if (loadfile_bfd
== NULL
)
1385 perror_with_name (filename
);
1389 /* FIXME: should be checking for errors from bfd_close (for one thing,
1390 on error it does not free all the storage associated with the
1392 make_cleanup_bfd_close (loadfile_bfd
);
1394 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1396 error ("\"%s\" is not an object file: %s", filename
,
1397 bfd_errmsg (bfd_get_error ()));
1400 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1401 (void *) &cbdata
.total_size
);
1403 start_time
= time (NULL
);
1405 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1407 end_time
= time (NULL
);
1409 entry
= bfd_get_start_address (loadfile_bfd
);
1410 ui_out_text (uiout
, "Start address ");
1411 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1412 ui_out_text (uiout
, ", load size ");
1413 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1414 ui_out_text (uiout
, "\n");
1415 /* We were doing this in remote-mips.c, I suspect it is right
1416 for other targets too. */
1419 /* FIXME: are we supposed to call symbol_file_add or not? According to
1420 a comment from remote-mips.c (where a call to symbol_file_add was
1421 commented out), making the call confuses GDB if more than one file is
1422 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1425 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1426 cbdata
.write_count
, end_time
- start_time
);
1428 do_cleanups (old_cleanups
);
1431 /* Report how fast the transfer went. */
1433 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1434 replaced by print_transfer_performance (with a very different
1435 function signature). */
1438 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1441 print_transfer_performance (gdb_stdout
, data_count
,
1442 end_time
- start_time
, 0);
1446 print_transfer_performance (struct ui_file
*stream
,
1447 unsigned long data_count
,
1448 unsigned long write_count
,
1449 unsigned long time_count
)
1451 ui_out_text (uiout
, "Transfer rate: ");
1454 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1455 (data_count
* 8) / time_count
);
1456 ui_out_text (uiout
, " bits/sec");
1460 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1461 ui_out_text (uiout
, " bits in <1 sec");
1463 if (write_count
> 0)
1465 ui_out_text (uiout
, ", ");
1466 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1467 ui_out_text (uiout
, " bytes/write");
1469 ui_out_text (uiout
, ".\n");
1472 /* This function allows the addition of incrementally linked object files.
1473 It does not modify any state in the target, only in the debugger. */
1474 /* Note: ezannoni 2000-04-13 This function/command used to have a
1475 special case syntax for the rombug target (Rombug is the boot
1476 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1477 rombug case, the user doesn't need to supply a text address,
1478 instead a call to target_link() (in target.c) would supply the
1479 value to use. We are now discontinuing this type of ad hoc syntax. */
1483 add_symbol_file_command (char *args
, int from_tty
)
1485 char *filename
= NULL
;
1486 int flags
= OBJF_USERLOADED
;
1488 int expecting_option
= 0;
1489 int section_index
= 0;
1493 int expecting_sec_name
= 0;
1494 int expecting_sec_addr
= 0;
1500 } sect_opts
[SECT_OFF_MAX
];
1502 struct section_addr_info section_addrs
;
1503 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1508 error ("add-symbol-file takes a file name and an address");
1510 /* Make a copy of the string that we can safely write into. */
1511 args
= xstrdup (args
);
1513 /* Ensure section_addrs is initialized */
1514 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1516 while (*args
!= '\000')
1518 /* Any leading spaces? */
1519 while (isspace (*args
))
1522 /* Point arg to the beginning of the argument. */
1525 /* Move args pointer over the argument. */
1526 while ((*args
!= '\000') && !isspace (*args
))
1529 /* If there are more arguments, terminate arg and
1531 if (*args
!= '\000')
1534 /* Now process the argument. */
1537 /* The first argument is the file name. */
1538 filename
= tilde_expand (arg
);
1539 make_cleanup (xfree
, filename
);
1544 /* The second argument is always the text address at which
1545 to load the program. */
1546 sect_opts
[section_index
].name
= ".text";
1547 sect_opts
[section_index
].value
= arg
;
1552 /* It's an option (starting with '-') or it's an argument
1557 if (strcmp (arg
, "-mapped") == 0)
1558 flags
|= OBJF_MAPPED
;
1560 if (strcmp (arg
, "-readnow") == 0)
1561 flags
|= OBJF_READNOW
;
1563 if (strcmp (arg
, "-s") == 0)
1565 if (section_index
>= SECT_OFF_MAX
)
1566 error ("Too many sections specified.");
1567 expecting_sec_name
= 1;
1568 expecting_sec_addr
= 1;
1573 if (expecting_sec_name
)
1575 sect_opts
[section_index
].name
= arg
;
1576 expecting_sec_name
= 0;
1579 if (expecting_sec_addr
)
1581 sect_opts
[section_index
].value
= arg
;
1582 expecting_sec_addr
= 0;
1586 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1592 /* Print the prompt for the query below. And save the arguments into
1593 a sect_addr_info structure to be passed around to other
1594 functions. We have to split this up into separate print
1595 statements because local_hex_string returns a local static
1598 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1599 for (i
= 0; i
< section_index
; i
++)
1602 char *val
= sect_opts
[i
].value
;
1603 char *sec
= sect_opts
[i
].name
;
1605 val
= sect_opts
[i
].value
;
1606 if (val
[0] == '0' && val
[1] == 'x')
1607 addr
= strtoul (val
+2, NULL
, 16);
1609 addr
= strtoul (val
, NULL
, 10);
1611 /* Here we store the section offsets in the order they were
1612 entered on the command line. */
1613 section_addrs
.other
[sec_num
].name
= sec
;
1614 section_addrs
.other
[sec_num
].addr
= addr
;
1615 printf_filtered ("\t%s_addr = %s\n",
1617 local_hex_string ((unsigned long)addr
));
1620 /* The object's sections are initialized when a
1621 call is made to build_objfile_section_table (objfile).
1622 This happens in reread_symbols.
1623 At this point, we don't know what file type this is,
1624 so we can't determine what section names are valid. */
1627 if (from_tty
&& (!query ("%s", "")))
1628 error ("Not confirmed.");
1630 symbol_file_add (filename
, from_tty
, §ion_addrs
, 0, flags
);
1632 /* Getting new symbols may change our opinion about what is
1634 reinit_frame_cache ();
1635 do_cleanups (my_cleanups
);
1639 add_shared_symbol_files_command (char *args
, int from_tty
)
1641 #ifdef ADD_SHARED_SYMBOL_FILES
1642 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1644 error ("This command is not available in this configuration of GDB.");
1648 /* Re-read symbols if a symbol-file has changed. */
1650 reread_symbols (void)
1652 struct objfile
*objfile
;
1655 struct stat new_statbuf
;
1658 /* With the addition of shared libraries, this should be modified,
1659 the load time should be saved in the partial symbol tables, since
1660 different tables may come from different source files. FIXME.
1661 This routine should then walk down each partial symbol table
1662 and see if the symbol table that it originates from has been changed */
1664 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1668 #ifdef IBM6000_TARGET
1669 /* If this object is from a shared library, then you should
1670 stat on the library name, not member name. */
1672 if (objfile
->obfd
->my_archive
)
1673 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1676 res
= stat (objfile
->name
, &new_statbuf
);
1679 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1680 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1684 new_modtime
= new_statbuf
.st_mtime
;
1685 if (new_modtime
!= objfile
->mtime
)
1687 struct cleanup
*old_cleanups
;
1688 struct section_offsets
*offsets
;
1690 char *obfd_filename
;
1692 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1695 /* There are various functions like symbol_file_add,
1696 symfile_bfd_open, syms_from_objfile, etc., which might
1697 appear to do what we want. But they have various other
1698 effects which we *don't* want. So we just do stuff
1699 ourselves. We don't worry about mapped files (for one thing,
1700 any mapped file will be out of date). */
1702 /* If we get an error, blow away this objfile (not sure if
1703 that is the correct response for things like shared
1705 old_cleanups
= make_cleanup_free_objfile (objfile
);
1706 /* We need to do this whenever any symbols go away. */
1707 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1709 /* Clean up any state BFD has sitting around. We don't need
1710 to close the descriptor but BFD lacks a way of closing the
1711 BFD without closing the descriptor. */
1712 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1713 if (!bfd_close (objfile
->obfd
))
1714 error ("Can't close BFD for %s: %s", objfile
->name
,
1715 bfd_errmsg (bfd_get_error ()));
1716 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1717 if (objfile
->obfd
== NULL
)
1718 error ("Can't open %s to read symbols.", objfile
->name
);
1719 /* bfd_openr sets cacheable to true, which is what we want. */
1720 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1721 error ("Can't read symbols from %s: %s.", objfile
->name
,
1722 bfd_errmsg (bfd_get_error ()));
1724 /* Save the offsets, we will nuke them with the rest of the
1726 num_offsets
= objfile
->num_sections
;
1727 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1728 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1730 /* Nuke all the state that we will re-read. Much of the following
1731 code which sets things to NULL really is necessary to tell
1732 other parts of GDB that there is nothing currently there. */
1734 /* FIXME: Do we have to free a whole linked list, or is this
1736 if (objfile
->global_psymbols
.list
)
1737 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1738 memset (&objfile
->global_psymbols
, 0,
1739 sizeof (objfile
->global_psymbols
));
1740 if (objfile
->static_psymbols
.list
)
1741 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1742 memset (&objfile
->static_psymbols
, 0,
1743 sizeof (objfile
->static_psymbols
));
1745 /* Free the obstacks for non-reusable objfiles */
1746 bcache_xfree (objfile
->psymbol_cache
);
1747 objfile
->psymbol_cache
= bcache_xmalloc ();
1748 bcache_xfree (objfile
->macro_cache
);
1749 objfile
->macro_cache
= bcache_xmalloc ();
1750 obstack_free (&objfile
->psymbol_obstack
, 0);
1751 obstack_free (&objfile
->symbol_obstack
, 0);
1752 obstack_free (&objfile
->type_obstack
, 0);
1753 objfile
->sections
= NULL
;
1754 objfile
->symtabs
= NULL
;
1755 objfile
->psymtabs
= NULL
;
1756 objfile
->free_psymtabs
= NULL
;
1757 objfile
->msymbols
= NULL
;
1758 objfile
->minimal_symbol_count
= 0;
1759 memset (&objfile
->msymbol_hash
, 0,
1760 sizeof (objfile
->msymbol_hash
));
1761 memset (&objfile
->msymbol_demangled_hash
, 0,
1762 sizeof (objfile
->msymbol_demangled_hash
));
1763 objfile
->fundamental_types
= NULL
;
1764 if (objfile
->sf
!= NULL
)
1766 (*objfile
->sf
->sym_finish
) (objfile
);
1769 /* We never make this a mapped file. */
1771 /* obstack_specify_allocation also initializes the obstack so
1773 objfile
->psymbol_cache
= bcache_xmalloc ();
1774 objfile
->macro_cache
= bcache_xmalloc ();
1775 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1777 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1779 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1781 if (build_objfile_section_table (objfile
))
1783 error ("Can't find the file sections in `%s': %s",
1784 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1787 /* We use the same section offsets as from last time. I'm not
1788 sure whether that is always correct for shared libraries. */
1789 objfile
->section_offsets
= (struct section_offsets
*)
1790 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1791 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1792 objfile
->num_sections
= num_offsets
;
1794 /* What the hell is sym_new_init for, anyway? The concept of
1795 distinguishing between the main file and additional files
1796 in this way seems rather dubious. */
1797 if (objfile
== symfile_objfile
)
1799 (*objfile
->sf
->sym_new_init
) (objfile
);
1801 RESET_HP_UX_GLOBALS ();
1805 (*objfile
->sf
->sym_init
) (objfile
);
1806 clear_complaints (&symfile_complaints
, 1, 1);
1807 /* The "mainline" parameter is a hideous hack; I think leaving it
1808 zero is OK since dbxread.c also does what it needs to do if
1809 objfile->global_psymbols.size is 0. */
1810 (*objfile
->sf
->sym_read
) (objfile
, 0);
1811 if (!have_partial_symbols () && !have_full_symbols ())
1814 printf_filtered ("(no debugging symbols found)\n");
1817 objfile
->flags
|= OBJF_SYMS
;
1819 /* We're done reading the symbol file; finish off complaints. */
1820 clear_complaints (&symfile_complaints
, 0, 1);
1822 /* Getting new symbols may change our opinion about what is
1825 reinit_frame_cache ();
1827 /* Discard cleanups as symbol reading was successful. */
1828 discard_cleanups (old_cleanups
);
1830 /* If the mtime has changed between the time we set new_modtime
1831 and now, we *want* this to be out of date, so don't call stat
1833 objfile
->mtime
= new_modtime
;
1836 /* Call this after reading in a new symbol table to give target
1837 dependent code a crack at the new symbols. For instance, this
1838 could be used to update the values of target-specific symbols GDB
1839 needs to keep track of (such as _sigtramp, or whatever). */
1841 TARGET_SYMFILE_POSTREAD (objfile
);
1847 clear_symtab_users ();
1859 static filename_language
*filename_language_table
;
1860 static int fl_table_size
, fl_table_next
;
1863 add_filename_language (char *ext
, enum language lang
)
1865 if (fl_table_next
>= fl_table_size
)
1867 fl_table_size
+= 10;
1868 filename_language_table
=
1869 xrealloc (filename_language_table
,
1870 fl_table_size
* sizeof (*filename_language_table
));
1873 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
1874 filename_language_table
[fl_table_next
].lang
= lang
;
1878 static char *ext_args
;
1881 set_ext_lang_command (char *args
, int from_tty
)
1884 char *cp
= ext_args
;
1887 /* First arg is filename extension, starting with '.' */
1889 error ("'%s': Filename extension must begin with '.'", ext_args
);
1891 /* Find end of first arg. */
1892 while (*cp
&& !isspace (*cp
))
1896 error ("'%s': two arguments required -- filename extension and language",
1899 /* Null-terminate first arg */
1902 /* Find beginning of second arg, which should be a source language. */
1903 while (*cp
&& isspace (*cp
))
1907 error ("'%s': two arguments required -- filename extension and language",
1910 /* Lookup the language from among those we know. */
1911 lang
= language_enum (cp
);
1913 /* Now lookup the filename extension: do we already know it? */
1914 for (i
= 0; i
< fl_table_next
; i
++)
1915 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1918 if (i
>= fl_table_next
)
1920 /* new file extension */
1921 add_filename_language (ext_args
, lang
);
1925 /* redefining a previously known filename extension */
1928 /* query ("Really make files of type %s '%s'?", */
1929 /* ext_args, language_str (lang)); */
1931 xfree (filename_language_table
[i
].ext
);
1932 filename_language_table
[i
].ext
= xstrdup (ext_args
);
1933 filename_language_table
[i
].lang
= lang
;
1938 info_ext_lang_command (char *args
, int from_tty
)
1942 printf_filtered ("Filename extensions and the languages they represent:");
1943 printf_filtered ("\n\n");
1944 for (i
= 0; i
< fl_table_next
; i
++)
1945 printf_filtered ("\t%s\t- %s\n",
1946 filename_language_table
[i
].ext
,
1947 language_str (filename_language_table
[i
].lang
));
1951 init_filename_language_table (void)
1953 if (fl_table_size
== 0) /* protect against repetition */
1957 filename_language_table
=
1958 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1959 add_filename_language (".c", language_c
);
1960 add_filename_language (".C", language_cplus
);
1961 add_filename_language (".cc", language_cplus
);
1962 add_filename_language (".cp", language_cplus
);
1963 add_filename_language (".cpp", language_cplus
);
1964 add_filename_language (".cxx", language_cplus
);
1965 add_filename_language (".c++", language_cplus
);
1966 add_filename_language (".java", language_java
);
1967 add_filename_language (".class", language_java
);
1968 /* OBSOLETE add_filename_language (".ch", language_chill); */
1969 /* OBSOLETE add_filename_language (".c186", language_chill); */
1970 /* OBSOLETE add_filename_language (".c286", language_chill); */
1971 add_filename_language (".m", language_objc
);
1972 add_filename_language (".f", language_fortran
);
1973 add_filename_language (".F", language_fortran
);
1974 add_filename_language (".s", language_asm
);
1975 add_filename_language (".S", language_asm
);
1976 add_filename_language (".pas", language_pascal
);
1977 add_filename_language (".p", language_pascal
);
1978 add_filename_language (".pp", language_pascal
);
1983 deduce_language_from_filename (char *filename
)
1988 if (filename
!= NULL
)
1989 if ((cp
= strrchr (filename
, '.')) != NULL
)
1990 for (i
= 0; i
< fl_table_next
; i
++)
1991 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1992 return filename_language_table
[i
].lang
;
1994 return language_unknown
;
1999 Allocate and partly initialize a new symbol table. Return a pointer
2000 to it. error() if no space.
2002 Caller must set these fields:
2008 possibly free_named_symtabs (symtab->filename);
2012 allocate_symtab (char *filename
, struct objfile
*objfile
)
2014 register struct symtab
*symtab
;
2016 symtab
= (struct symtab
*)
2017 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
2018 memset (symtab
, 0, sizeof (*symtab
));
2019 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2020 &objfile
->symbol_obstack
);
2021 symtab
->fullname
= NULL
;
2022 symtab
->language
= deduce_language_from_filename (filename
);
2023 symtab
->debugformat
= obsavestring ("unknown", 7,
2024 &objfile
->symbol_obstack
);
2026 /* Hook it to the objfile it comes from */
2028 symtab
->objfile
= objfile
;
2029 symtab
->next
= objfile
->symtabs
;
2030 objfile
->symtabs
= symtab
;
2032 /* FIXME: This should go away. It is only defined for the Z8000,
2033 and the Z8000 definition of this macro doesn't have anything to
2034 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2035 here for convenience. */
2036 #ifdef INIT_EXTRA_SYMTAB_INFO
2037 INIT_EXTRA_SYMTAB_INFO (symtab
);
2043 struct partial_symtab
*
2044 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2046 struct partial_symtab
*psymtab
;
2048 if (objfile
->free_psymtabs
)
2050 psymtab
= objfile
->free_psymtabs
;
2051 objfile
->free_psymtabs
= psymtab
->next
;
2054 psymtab
= (struct partial_symtab
*)
2055 obstack_alloc (&objfile
->psymbol_obstack
,
2056 sizeof (struct partial_symtab
));
2058 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2059 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2060 &objfile
->psymbol_obstack
);
2061 psymtab
->symtab
= NULL
;
2063 /* Prepend it to the psymtab list for the objfile it belongs to.
2064 Psymtabs are searched in most recent inserted -> least recent
2067 psymtab
->objfile
= objfile
;
2068 psymtab
->next
= objfile
->psymtabs
;
2069 objfile
->psymtabs
= psymtab
;
2072 struct partial_symtab
**prev_pst
;
2073 psymtab
->objfile
= objfile
;
2074 psymtab
->next
= NULL
;
2075 prev_pst
= &(objfile
->psymtabs
);
2076 while ((*prev_pst
) != NULL
)
2077 prev_pst
= &((*prev_pst
)->next
);
2078 (*prev_pst
) = psymtab
;
2086 discard_psymtab (struct partial_symtab
*pst
)
2088 struct partial_symtab
**prev_pst
;
2091 Empty psymtabs happen as a result of header files which don't
2092 have any symbols in them. There can be a lot of them. But this
2093 check is wrong, in that a psymtab with N_SLINE entries but
2094 nothing else is not empty, but we don't realize that. Fixing
2095 that without slowing things down might be tricky. */
2097 /* First, snip it out of the psymtab chain */
2099 prev_pst
= &(pst
->objfile
->psymtabs
);
2100 while ((*prev_pst
) != pst
)
2101 prev_pst
= &((*prev_pst
)->next
);
2102 (*prev_pst
) = pst
->next
;
2104 /* Next, put it on a free list for recycling */
2106 pst
->next
= pst
->objfile
->free_psymtabs
;
2107 pst
->objfile
->free_psymtabs
= pst
;
2111 /* Reset all data structures in gdb which may contain references to symbol
2115 clear_symtab_users (void)
2117 /* Someday, we should do better than this, by only blowing away
2118 the things that really need to be blown. */
2119 clear_value_history ();
2121 clear_internalvars ();
2122 breakpoint_re_set ();
2123 set_default_breakpoint (0, 0, 0, 0);
2124 clear_current_source_symtab_and_line ();
2125 clear_pc_function_cache ();
2126 if (target_new_objfile_hook
)
2127 target_new_objfile_hook (NULL
);
2131 clear_symtab_users_cleanup (void *ignore
)
2133 clear_symtab_users ();
2136 /* clear_symtab_users_once:
2138 This function is run after symbol reading, or from a cleanup.
2139 If an old symbol table was obsoleted, the old symbol table
2140 has been blown away, but the other GDB data structures that may
2141 reference it have not yet been cleared or re-directed. (The old
2142 symtab was zapped, and the cleanup queued, in free_named_symtab()
2145 This function can be queued N times as a cleanup, or called
2146 directly; it will do all the work the first time, and then will be a
2147 no-op until the next time it is queued. This works by bumping a
2148 counter at queueing time. Much later when the cleanup is run, or at
2149 the end of symbol processing (in case the cleanup is discarded), if
2150 the queued count is greater than the "done-count", we do the work
2151 and set the done-count to the queued count. If the queued count is
2152 less than or equal to the done-count, we just ignore the call. This
2153 is needed because reading a single .o file will often replace many
2154 symtabs (one per .h file, for example), and we don't want to reset
2155 the breakpoints N times in the user's face.
2157 The reason we both queue a cleanup, and call it directly after symbol
2158 reading, is because the cleanup protects us in case of errors, but is
2159 discarded if symbol reading is successful. */
2162 /* FIXME: As free_named_symtabs is currently a big noop this function
2163 is no longer needed. */
2164 static void clear_symtab_users_once (void);
2166 static int clear_symtab_users_queued
;
2167 static int clear_symtab_users_done
;
2170 clear_symtab_users_once (void)
2172 /* Enforce once-per-`do_cleanups'-semantics */
2173 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2175 clear_symtab_users_done
= clear_symtab_users_queued
;
2177 clear_symtab_users ();
2181 /* Delete the specified psymtab, and any others that reference it. */
2184 cashier_psymtab (struct partial_symtab
*pst
)
2186 struct partial_symtab
*ps
, *pprev
= NULL
;
2189 /* Find its previous psymtab in the chain */
2190 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2199 /* Unhook it from the chain. */
2200 if (ps
== pst
->objfile
->psymtabs
)
2201 pst
->objfile
->psymtabs
= ps
->next
;
2203 pprev
->next
= ps
->next
;
2205 /* FIXME, we can't conveniently deallocate the entries in the
2206 partial_symbol lists (global_psymbols/static_psymbols) that
2207 this psymtab points to. These just take up space until all
2208 the psymtabs are reclaimed. Ditto the dependencies list and
2209 filename, which are all in the psymbol_obstack. */
2211 /* We need to cashier any psymtab that has this one as a dependency... */
2213 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2215 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2217 if (ps
->dependencies
[i
] == pst
)
2219 cashier_psymtab (ps
);
2220 goto again
; /* Must restart, chain has been munged. */
2227 /* If a symtab or psymtab for filename NAME is found, free it along
2228 with any dependent breakpoints, displays, etc.
2229 Used when loading new versions of object modules with the "add-file"
2230 command. This is only called on the top-level symtab or psymtab's name;
2231 it is not called for subsidiary files such as .h files.
2233 Return value is 1 if we blew away the environment, 0 if not.
2234 FIXME. The return value appears to never be used.
2236 FIXME. I think this is not the best way to do this. We should
2237 work on being gentler to the environment while still cleaning up
2238 all stray pointers into the freed symtab. */
2241 free_named_symtabs (char *name
)
2244 /* FIXME: With the new method of each objfile having it's own
2245 psymtab list, this function needs serious rethinking. In particular,
2246 why was it ever necessary to toss psymtabs with specific compilation
2247 unit filenames, as opposed to all psymtabs from a particular symbol
2249 Well, the answer is that some systems permit reloading of particular
2250 compilation units. We want to blow away any old info about these
2251 compilation units, regardless of which objfiles they arrived in. --gnu. */
2253 register struct symtab
*s
;
2254 register struct symtab
*prev
;
2255 register struct partial_symtab
*ps
;
2256 struct blockvector
*bv
;
2259 /* We only wack things if the symbol-reload switch is set. */
2260 if (!symbol_reloading
)
2263 /* Some symbol formats have trouble providing file names... */
2264 if (name
== 0 || *name
== '\0')
2267 /* Look for a psymtab with the specified name. */
2270 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2272 if (STREQ (name
, ps
->filename
))
2274 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2275 goto again2
; /* Must restart, chain has been munged */
2279 /* Look for a symtab with the specified name. */
2281 for (s
= symtab_list
; s
; s
= s
->next
)
2283 if (STREQ (name
, s
->filename
))
2290 if (s
== symtab_list
)
2291 symtab_list
= s
->next
;
2293 prev
->next
= s
->next
;
2295 /* For now, queue a delete for all breakpoints, displays, etc., whether
2296 or not they depend on the symtab being freed. This should be
2297 changed so that only those data structures affected are deleted. */
2299 /* But don't delete anything if the symtab is empty.
2300 This test is necessary due to a bug in "dbxread.c" that
2301 causes empty symtabs to be created for N_SO symbols that
2302 contain the pathname of the object file. (This problem
2303 has been fixed in GDB 3.9x). */
2305 bv
= BLOCKVECTOR (s
);
2306 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2307 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2308 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2310 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2312 clear_symtab_users_queued
++;
2313 make_cleanup (clear_symtab_users_once
, 0);
2318 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2326 /* It is still possible that some breakpoints will be affected
2327 even though no symtab was found, since the file might have
2328 been compiled without debugging, and hence not be associated
2329 with a symtab. In order to handle this correctly, we would need
2330 to keep a list of text address ranges for undebuggable files.
2331 For now, we do nothing, since this is a fairly obscure case. */
2335 /* FIXME, what about the minimal symbol table? */
2342 /* Allocate and partially fill a partial symtab. It will be
2343 completely filled at the end of the symbol list.
2345 FILENAME is the name of the symbol-file we are reading from. */
2347 struct partial_symtab
*
2348 start_psymtab_common (struct objfile
*objfile
,
2349 struct section_offsets
*section_offsets
, char *filename
,
2350 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2351 struct partial_symbol
**static_syms
)
2353 struct partial_symtab
*psymtab
;
2355 psymtab
= allocate_psymtab (filename
, objfile
);
2356 psymtab
->section_offsets
= section_offsets
;
2357 psymtab
->textlow
= textlow
;
2358 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2359 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2360 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2364 /* Add a symbol with a long value to a psymtab.
2365 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2368 add_psymbol_to_list (char *name
, int namelength
, namespace_enum
namespace,
2369 enum address_class
class,
2370 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2371 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2372 enum language language
, struct objfile
*objfile
)
2374 register struct partial_symbol
*psym
;
2375 char *buf
= alloca (namelength
+ 1);
2376 /* psymbol is static so that there will be no uninitialized gaps in the
2377 structure which might contain random data, causing cache misses in
2379 static struct partial_symbol psymbol
;
2381 /* Create local copy of the partial symbol */
2382 memcpy (buf
, name
, namelength
);
2383 buf
[namelength
] = '\0';
2384 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, objfile
->psymbol_cache
);
2385 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2388 SYMBOL_VALUE (&psymbol
) = val
;
2392 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2394 SYMBOL_SECTION (&psymbol
) = 0;
2395 SYMBOL_LANGUAGE (&psymbol
) = language
;
2396 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2397 PSYMBOL_CLASS (&psymbol
) = class;
2398 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2400 /* Stash the partial symbol away in the cache */
2401 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2403 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2404 if (list
->next
>= list
->list
+ list
->size
)
2406 extend_psymbol_list (list
, objfile
);
2408 *list
->next
++ = psym
;
2409 OBJSTAT (objfile
, n_psyms
++);
2412 /* Add a symbol with a long value to a psymtab. This differs from
2413 * add_psymbol_to_list above in taking both a mangled and a demangled
2417 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2418 int dem_namelength
, namespace_enum
namespace,
2419 enum address_class
class,
2420 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2421 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2422 enum language language
,
2423 struct objfile
*objfile
)
2425 register struct partial_symbol
*psym
;
2426 char *buf
= alloca (namelength
+ 1);
2427 /* psymbol is static so that there will be no uninitialized gaps in the
2428 structure which might contain random data, causing cache misses in
2430 static struct partial_symbol psymbol
;
2432 /* Create local copy of the partial symbol */
2434 memcpy (buf
, name
, namelength
);
2435 buf
[namelength
] = '\0';
2436 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, objfile
->psymbol_cache
);
2438 buf
= alloca (dem_namelength
+ 1);
2439 memcpy (buf
, dem_name
, dem_namelength
);
2440 buf
[dem_namelength
] = '\0';
2445 case language_cplus
:
2446 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2447 bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2449 /* OBSOLETE case language_chill: */
2450 /* OBSOLETE SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) = */
2451 /* OBSOLETE bcache (buf, dem_namelength + 1, objfile->psymbol_cache); */
2453 /* FIXME What should be done for the default case? Ignoring for now. */
2456 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2459 SYMBOL_VALUE (&psymbol
) = val
;
2463 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2465 SYMBOL_SECTION (&psymbol
) = 0;
2466 SYMBOL_LANGUAGE (&psymbol
) = language
;
2467 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2468 PSYMBOL_CLASS (&psymbol
) = class;
2469 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2471 /* Stash the partial symbol away in the cache */
2472 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2474 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2475 if (list
->next
>= list
->list
+ list
->size
)
2477 extend_psymbol_list (list
, objfile
);
2479 *list
->next
++ = psym
;
2480 OBJSTAT (objfile
, n_psyms
++);
2483 /* Initialize storage for partial symbols. */
2486 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2488 /* Free any previously allocated psymbol lists. */
2490 if (objfile
->global_psymbols
.list
)
2492 xmfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2494 if (objfile
->static_psymbols
.list
)
2496 xmfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2499 /* Current best guess is that approximately a twentieth
2500 of the total symbols (in a debugging file) are global or static
2503 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2504 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2506 if (objfile
->global_psymbols
.size
> 0)
2508 objfile
->global_psymbols
.next
=
2509 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2510 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2511 * sizeof (struct partial_symbol
*)));
2513 if (objfile
->static_psymbols
.size
> 0)
2515 objfile
->static_psymbols
.next
=
2516 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2517 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2518 * sizeof (struct partial_symbol
*)));
2523 The following code implements an abstraction for debugging overlay sections.
2525 The target model is as follows:
2526 1) The gnu linker will permit multiple sections to be mapped into the
2527 same VMA, each with its own unique LMA (or load address).
2528 2) It is assumed that some runtime mechanism exists for mapping the
2529 sections, one by one, from the load address into the VMA address.
2530 3) This code provides a mechanism for gdb to keep track of which
2531 sections should be considered to be mapped from the VMA to the LMA.
2532 This information is used for symbol lookup, and memory read/write.
2533 For instance, if a section has been mapped then its contents
2534 should be read from the VMA, otherwise from the LMA.
2536 Two levels of debugger support for overlays are available. One is
2537 "manual", in which the debugger relies on the user to tell it which
2538 overlays are currently mapped. This level of support is
2539 implemented entirely in the core debugger, and the information about
2540 whether a section is mapped is kept in the objfile->obj_section table.
2542 The second level of support is "automatic", and is only available if
2543 the target-specific code provides functionality to read the target's
2544 overlay mapping table, and translate its contents for the debugger
2545 (by updating the mapped state information in the obj_section tables).
2547 The interface is as follows:
2549 overlay map <name> -- tell gdb to consider this section mapped
2550 overlay unmap <name> -- tell gdb to consider this section unmapped
2551 overlay list -- list the sections that GDB thinks are mapped
2552 overlay read-target -- get the target's state of what's mapped
2553 overlay off/manual/auto -- set overlay debugging state
2554 Functional interface:
2555 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2556 section, return that section.
2557 find_pc_overlay(pc): find any overlay section that contains
2558 the pc, either in its VMA or its LMA
2559 overlay_is_mapped(sect): true if overlay is marked as mapped
2560 section_is_overlay(sect): true if section's VMA != LMA
2561 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2562 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2563 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2564 overlay_mapped_address(...): map an address from section's LMA to VMA
2565 overlay_unmapped_address(...): map an address from section's VMA to LMA
2566 symbol_overlayed_address(...): Return a "current" address for symbol:
2567 either in VMA or LMA depending on whether
2568 the symbol's section is currently mapped
2571 /* Overlay debugging state: */
2573 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2574 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2576 /* Target vector for refreshing overlay mapped state */
2577 static void simple_overlay_update (struct obj_section
*);
2578 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2580 /* Function: section_is_overlay (SECTION)
2581 Returns true if SECTION has VMA not equal to LMA, ie.
2582 SECTION is loaded at an address different from where it will "run". */
2585 section_is_overlay (asection
*section
)
2587 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2589 if (overlay_debugging
)
2590 if (section
&& section
->lma
!= 0 &&
2591 section
->vma
!= section
->lma
)
2597 /* Function: overlay_invalidate_all (void)
2598 Invalidate the mapped state of all overlay sections (mark it as stale). */
2601 overlay_invalidate_all (void)
2603 struct objfile
*objfile
;
2604 struct obj_section
*sect
;
2606 ALL_OBJSECTIONS (objfile
, sect
)
2607 if (section_is_overlay (sect
->the_bfd_section
))
2608 sect
->ovly_mapped
= -1;
2611 /* Function: overlay_is_mapped (SECTION)
2612 Returns true if section is an overlay, and is currently mapped.
2613 Private: public access is thru function section_is_mapped.
2615 Access to the ovly_mapped flag is restricted to this function, so
2616 that we can do automatic update. If the global flag
2617 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2618 overlay_invalidate_all. If the mapped state of the particular
2619 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2622 overlay_is_mapped (struct obj_section
*osect
)
2624 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2627 switch (overlay_debugging
)
2631 return 0; /* overlay debugging off */
2632 case ovly_auto
: /* overlay debugging automatic */
2633 /* Unles there is a target_overlay_update function,
2634 there's really nothing useful to do here (can't really go auto) */
2635 if (target_overlay_update
)
2637 if (overlay_cache_invalid
)
2639 overlay_invalidate_all ();
2640 overlay_cache_invalid
= 0;
2642 if (osect
->ovly_mapped
== -1)
2643 (*target_overlay_update
) (osect
);
2645 /* fall thru to manual case */
2646 case ovly_on
: /* overlay debugging manual */
2647 return osect
->ovly_mapped
== 1;
2651 /* Function: section_is_mapped
2652 Returns true if section is an overlay, and is currently mapped. */
2655 section_is_mapped (asection
*section
)
2657 struct objfile
*objfile
;
2658 struct obj_section
*osect
;
2660 if (overlay_debugging
)
2661 if (section
&& section_is_overlay (section
))
2662 ALL_OBJSECTIONS (objfile
, osect
)
2663 if (osect
->the_bfd_section
== section
)
2664 return overlay_is_mapped (osect
);
2669 /* Function: pc_in_unmapped_range
2670 If PC falls into the lma range of SECTION, return true, else false. */
2673 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2675 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2679 if (overlay_debugging
)
2680 if (section
&& section_is_overlay (section
))
2682 size
= bfd_get_section_size_before_reloc (section
);
2683 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2689 /* Function: pc_in_mapped_range
2690 If PC falls into the vma range of SECTION, return true, else false. */
2693 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2695 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2699 if (overlay_debugging
)
2700 if (section
&& section_is_overlay (section
))
2702 size
= bfd_get_section_size_before_reloc (section
);
2703 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2710 /* Return true if the mapped ranges of sections A and B overlap, false
2713 sections_overlap (asection
*a
, asection
*b
)
2715 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2717 CORE_ADDR a_start
= a
->vma
;
2718 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
2719 CORE_ADDR b_start
= b
->vma
;
2720 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
2722 return (a_start
< b_end
&& b_start
< a_end
);
2725 /* Function: overlay_unmapped_address (PC, SECTION)
2726 Returns the address corresponding to PC in the unmapped (load) range.
2727 May be the same as PC. */
2730 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2732 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2734 if (overlay_debugging
)
2735 if (section
&& section_is_overlay (section
) &&
2736 pc_in_mapped_range (pc
, section
))
2737 return pc
+ section
->lma
- section
->vma
;
2742 /* Function: overlay_mapped_address (PC, SECTION)
2743 Returns the address corresponding to PC in the mapped (runtime) range.
2744 May be the same as PC. */
2747 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2749 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2751 if (overlay_debugging
)
2752 if (section
&& section_is_overlay (section
) &&
2753 pc_in_unmapped_range (pc
, section
))
2754 return pc
+ section
->vma
- section
->lma
;
2760 /* Function: symbol_overlayed_address
2761 Return one of two addresses (relative to the VMA or to the LMA),
2762 depending on whether the section is mapped or not. */
2765 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2767 if (overlay_debugging
)
2769 /* If the symbol has no section, just return its regular address. */
2772 /* If the symbol's section is not an overlay, just return its address */
2773 if (!section_is_overlay (section
))
2775 /* If the symbol's section is mapped, just return its address */
2776 if (section_is_mapped (section
))
2779 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2780 * then return its LOADED address rather than its vma address!!
2782 return overlay_unmapped_address (address
, section
);
2787 /* Function: find_pc_overlay (PC)
2788 Return the best-match overlay section for PC:
2789 If PC matches a mapped overlay section's VMA, return that section.
2790 Else if PC matches an unmapped section's VMA, return that section.
2791 Else if PC matches an unmapped section's LMA, return that section. */
2794 find_pc_overlay (CORE_ADDR pc
)
2796 struct objfile
*objfile
;
2797 struct obj_section
*osect
, *best_match
= NULL
;
2799 if (overlay_debugging
)
2800 ALL_OBJSECTIONS (objfile
, osect
)
2801 if (section_is_overlay (osect
->the_bfd_section
))
2803 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2805 if (overlay_is_mapped (osect
))
2806 return osect
->the_bfd_section
;
2810 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2813 return best_match
? best_match
->the_bfd_section
: NULL
;
2816 /* Function: find_pc_mapped_section (PC)
2817 If PC falls into the VMA address range of an overlay section that is
2818 currently marked as MAPPED, return that section. Else return NULL. */
2821 find_pc_mapped_section (CORE_ADDR pc
)
2823 struct objfile
*objfile
;
2824 struct obj_section
*osect
;
2826 if (overlay_debugging
)
2827 ALL_OBJSECTIONS (objfile
, osect
)
2828 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2829 overlay_is_mapped (osect
))
2830 return osect
->the_bfd_section
;
2835 /* Function: list_overlays_command
2836 Print a list of mapped sections and their PC ranges */
2839 list_overlays_command (char *args
, int from_tty
)
2842 struct objfile
*objfile
;
2843 struct obj_section
*osect
;
2845 if (overlay_debugging
)
2846 ALL_OBJSECTIONS (objfile
, osect
)
2847 if (overlay_is_mapped (osect
))
2853 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2854 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2855 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2856 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2858 printf_filtered ("Section %s, loaded at ", name
);
2859 print_address_numeric (lma
, 1, gdb_stdout
);
2860 puts_filtered (" - ");
2861 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2862 printf_filtered (", mapped at ");
2863 print_address_numeric (vma
, 1, gdb_stdout
);
2864 puts_filtered (" - ");
2865 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2866 puts_filtered ("\n");
2871 printf_filtered ("No sections are mapped.\n");
2874 /* Function: map_overlay_command
2875 Mark the named section as mapped (ie. residing at its VMA address). */
2878 map_overlay_command (char *args
, int from_tty
)
2880 struct objfile
*objfile
, *objfile2
;
2881 struct obj_section
*sec
, *sec2
;
2884 if (!overlay_debugging
)
2886 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2887 the 'overlay manual' command.");
2889 if (args
== 0 || *args
== 0)
2890 error ("Argument required: name of an overlay section");
2892 /* First, find a section matching the user supplied argument */
2893 ALL_OBJSECTIONS (objfile
, sec
)
2894 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2896 /* Now, check to see if the section is an overlay. */
2897 bfdsec
= sec
->the_bfd_section
;
2898 if (!section_is_overlay (bfdsec
))
2899 continue; /* not an overlay section */
2901 /* Mark the overlay as "mapped" */
2902 sec
->ovly_mapped
= 1;
2904 /* Next, make a pass and unmap any sections that are
2905 overlapped by this new section: */
2906 ALL_OBJSECTIONS (objfile2
, sec2
)
2907 if (sec2
->ovly_mapped
2909 && sec
->the_bfd_section
!= sec2
->the_bfd_section
2910 && sections_overlap (sec
->the_bfd_section
,
2911 sec2
->the_bfd_section
))
2914 printf_filtered ("Note: section %s unmapped by overlap\n",
2915 bfd_section_name (objfile
->obfd
,
2916 sec2
->the_bfd_section
));
2917 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2921 error ("No overlay section called %s", args
);
2924 /* Function: unmap_overlay_command
2925 Mark the overlay section as unmapped
2926 (ie. resident in its LMA address range, rather than the VMA range). */
2929 unmap_overlay_command (char *args
, int from_tty
)
2931 struct objfile
*objfile
;
2932 struct obj_section
*sec
;
2934 if (!overlay_debugging
)
2936 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2937 the 'overlay manual' command.");
2939 if (args
== 0 || *args
== 0)
2940 error ("Argument required: name of an overlay section");
2942 /* First, find a section matching the user supplied argument */
2943 ALL_OBJSECTIONS (objfile
, sec
)
2944 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2946 if (!sec
->ovly_mapped
)
2947 error ("Section %s is not mapped", args
);
2948 sec
->ovly_mapped
= 0;
2951 error ("No overlay section called %s", args
);
2954 /* Function: overlay_auto_command
2955 A utility command to turn on overlay debugging.
2956 Possibly this should be done via a set/show command. */
2959 overlay_auto_command (char *args
, int from_tty
)
2961 overlay_debugging
= ovly_auto
;
2962 enable_overlay_breakpoints ();
2964 printf_filtered ("Automatic overlay debugging enabled.");
2967 /* Function: overlay_manual_command
2968 A utility command to turn on overlay debugging.
2969 Possibly this should be done via a set/show command. */
2972 overlay_manual_command (char *args
, int from_tty
)
2974 overlay_debugging
= ovly_on
;
2975 disable_overlay_breakpoints ();
2977 printf_filtered ("Overlay debugging enabled.");
2980 /* Function: overlay_off_command
2981 A utility command to turn on overlay debugging.
2982 Possibly this should be done via a set/show command. */
2985 overlay_off_command (char *args
, int from_tty
)
2987 overlay_debugging
= ovly_off
;
2988 disable_overlay_breakpoints ();
2990 printf_filtered ("Overlay debugging disabled.");
2994 overlay_load_command (char *args
, int from_tty
)
2996 if (target_overlay_update
)
2997 (*target_overlay_update
) (NULL
);
2999 error ("This target does not know how to read its overlay state.");
3002 /* Function: overlay_command
3003 A place-holder for a mis-typed command */
3005 /* Command list chain containing all defined "overlay" subcommands. */
3006 struct cmd_list_element
*overlaylist
;
3009 overlay_command (char *args
, int from_tty
)
3012 ("\"overlay\" must be followed by the name of an overlay command.\n");
3013 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3017 /* Target Overlays for the "Simplest" overlay manager:
3019 This is GDB's default target overlay layer. It works with the
3020 minimal overlay manager supplied as an example by Cygnus. The
3021 entry point is via a function pointer "target_overlay_update",
3022 so targets that use a different runtime overlay manager can
3023 substitute their own overlay_update function and take over the
3026 The overlay_update function pokes around in the target's data structures
3027 to see what overlays are mapped, and updates GDB's overlay mapping with
3030 In this simple implementation, the target data structures are as follows:
3031 unsigned _novlys; /# number of overlay sections #/
3032 unsigned _ovly_table[_novlys][4] = {
3033 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3034 {..., ..., ..., ...},
3036 unsigned _novly_regions; /# number of overlay regions #/
3037 unsigned _ovly_region_table[_novly_regions][3] = {
3038 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3041 These functions will attempt to update GDB's mappedness state in the
3042 symbol section table, based on the target's mappedness state.
3044 To do this, we keep a cached copy of the target's _ovly_table, and
3045 attempt to detect when the cached copy is invalidated. The main
3046 entry point is "simple_overlay_update(SECT), which looks up SECT in
3047 the cached table and re-reads only the entry for that section from
3048 the target (whenever possible).
3051 /* Cached, dynamically allocated copies of the target data structures: */
3052 static unsigned (*cache_ovly_table
)[4] = 0;
3054 static unsigned (*cache_ovly_region_table
)[3] = 0;
3056 static unsigned cache_novlys
= 0;
3058 static unsigned cache_novly_regions
= 0;
3060 static CORE_ADDR cache_ovly_table_base
= 0;
3062 static CORE_ADDR cache_ovly_region_table_base
= 0;
3066 VMA
, SIZE
, LMA
, MAPPED
3068 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3070 /* Throw away the cached copy of _ovly_table */
3072 simple_free_overlay_table (void)
3074 if (cache_ovly_table
)
3075 xfree (cache_ovly_table
);
3077 cache_ovly_table
= NULL
;
3078 cache_ovly_table_base
= 0;
3082 /* Throw away the cached copy of _ovly_region_table */
3084 simple_free_overlay_region_table (void)
3086 if (cache_ovly_region_table
)
3087 xfree (cache_ovly_region_table
);
3088 cache_novly_regions
= 0;
3089 cache_ovly_region_table
= NULL
;
3090 cache_ovly_region_table_base
= 0;
3094 /* Read an array of ints from the target into a local buffer.
3095 Convert to host order. int LEN is number of ints */
3097 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3099 /* FIXME (alloca): Not safe if array is very large. */
3100 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3103 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3104 for (i
= 0; i
< len
; i
++)
3105 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3109 /* Find and grab a copy of the target _ovly_table
3110 (and _novlys, which is needed for the table's size) */
3112 simple_read_overlay_table (void)
3114 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3116 simple_free_overlay_table ();
3117 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3120 error ("Error reading inferior's overlay table: "
3121 "couldn't find `_novlys' variable\n"
3122 "in inferior. Use `overlay manual' mode.");
3126 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3127 if (! ovly_table_msym
)
3129 error ("Error reading inferior's overlay table: couldn't find "
3130 "`_ovly_table' array\n"
3131 "in inferior. Use `overlay manual' mode.");
3135 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3137 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3138 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3139 read_target_long_array (cache_ovly_table_base
,
3140 (int *) cache_ovly_table
,
3143 return 1; /* SUCCESS */
3147 /* Find and grab a copy of the target _ovly_region_table
3148 (and _novly_regions, which is needed for the table's size) */
3150 simple_read_overlay_region_table (void)
3152 struct minimal_symbol
*msym
;
3154 simple_free_overlay_region_table ();
3155 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3157 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3159 return 0; /* failure */
3160 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3161 if (cache_ovly_region_table
!= NULL
)
3163 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3166 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3167 read_target_long_array (cache_ovly_region_table_base
,
3168 (int *) cache_ovly_region_table
,
3169 cache_novly_regions
* 3);
3172 return 0; /* failure */
3175 return 0; /* failure */
3176 return 1; /* SUCCESS */
3180 /* Function: simple_overlay_update_1
3181 A helper function for simple_overlay_update. Assuming a cached copy
3182 of _ovly_table exists, look through it to find an entry whose vma,
3183 lma and size match those of OSECT. Re-read the entry and make sure
3184 it still matches OSECT (else the table may no longer be valid).
3185 Set OSECT's mapped state to match the entry. Return: 1 for
3186 success, 0 for failure. */
3189 simple_overlay_update_1 (struct obj_section
*osect
)
3192 bfd
*obfd
= osect
->objfile
->obfd
;
3193 asection
*bsect
= osect
->the_bfd_section
;
3195 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3196 for (i
= 0; i
< cache_novlys
; i
++)
3197 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3198 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3199 /* && cache_ovly_table[i][SIZE] == size */ )
3201 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3202 (int *) cache_ovly_table
[i
], 4);
3203 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3204 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3205 /* && cache_ovly_table[i][SIZE] == size */ )
3207 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3210 else /* Warning! Warning! Target's ovly table has changed! */
3216 /* Function: simple_overlay_update
3217 If OSECT is NULL, then update all sections' mapped state
3218 (after re-reading the entire target _ovly_table).
3219 If OSECT is non-NULL, then try to find a matching entry in the
3220 cached ovly_table and update only OSECT's mapped state.
3221 If a cached entry can't be found or the cache isn't valid, then
3222 re-read the entire cache, and go ahead and update all sections. */
3225 simple_overlay_update (struct obj_section
*osect
)
3227 struct objfile
*objfile
;
3229 /* Were we given an osect to look up? NULL means do all of them. */
3231 /* Have we got a cached copy of the target's overlay table? */
3232 if (cache_ovly_table
!= NULL
)
3233 /* Does its cached location match what's currently in the symtab? */
3234 if (cache_ovly_table_base
==
3235 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3236 /* Then go ahead and try to look up this single section in the cache */
3237 if (simple_overlay_update_1 (osect
))
3238 /* Found it! We're done. */
3241 /* Cached table no good: need to read the entire table anew.
3242 Or else we want all the sections, in which case it's actually
3243 more efficient to read the whole table in one block anyway. */
3245 if (! simple_read_overlay_table ())
3248 /* Now may as well update all sections, even if only one was requested. */
3249 ALL_OBJSECTIONS (objfile
, osect
)
3250 if (section_is_overlay (osect
->the_bfd_section
))
3253 bfd
*obfd
= osect
->objfile
->obfd
;
3254 asection
*bsect
= osect
->the_bfd_section
;
3256 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3257 for (i
= 0; i
< cache_novlys
; i
++)
3258 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3259 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3260 /* && cache_ovly_table[i][SIZE] == size */ )
3261 { /* obj_section matches i'th entry in ovly_table */
3262 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3263 break; /* finished with inner for loop: break out */
3270 _initialize_symfile (void)
3272 struct cmd_list_element
*c
;
3274 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3275 "Load symbol table from executable file FILE.\n\
3276 The `file' command can also load symbol tables, as well as setting the file\n\
3277 to execute.", &cmdlist
);
3278 set_cmd_completer (c
, filename_completer
);
3280 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3281 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3282 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3283 ADDR is the starting address of the file's text.\n\
3284 The optional arguments are section-name section-address pairs and\n\
3285 should be specified if the data and bss segments are not contiguous\n\
3286 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3288 set_cmd_completer (c
, filename_completer
);
3290 c
= add_cmd ("add-shared-symbol-files", class_files
,
3291 add_shared_symbol_files_command
,
3292 "Load the symbols from shared objects in the dynamic linker's link map.",
3294 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3297 c
= add_cmd ("load", class_files
, load_command
,
3298 "Dynamically load FILE into the running program, and record its symbols\n\
3299 for access from GDB.", &cmdlist
);
3300 set_cmd_completer (c
, filename_completer
);
3303 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3304 (char *) &symbol_reloading
,
3305 "Set dynamic symbol table reloading multiple times in one run.",
3309 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3310 "Commands for debugging overlays.", &overlaylist
,
3311 "overlay ", 0, &cmdlist
);
3313 add_com_alias ("ovly", "overlay", class_alias
, 1);
3314 add_com_alias ("ov", "overlay", class_alias
, 1);
3316 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3317 "Assert that an overlay section is mapped.", &overlaylist
);
3319 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3320 "Assert that an overlay section is unmapped.", &overlaylist
);
3322 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3323 "List mappings of overlay sections.", &overlaylist
);
3325 add_cmd ("manual", class_support
, overlay_manual_command
,
3326 "Enable overlay debugging.", &overlaylist
);
3327 add_cmd ("off", class_support
, overlay_off_command
,
3328 "Disable overlay debugging.", &overlaylist
);
3329 add_cmd ("auto", class_support
, overlay_auto_command
,
3330 "Enable automatic overlay debugging.", &overlaylist
);
3331 add_cmd ("load-target", class_support
, overlay_load_command
,
3332 "Read the overlay mapping state from the target.", &overlaylist
);
3334 /* Filename extension to source language lookup table: */
3335 init_filename_language_table ();
3336 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3338 "Set mapping between filename extension and source language.\n\
3339 Usage: set extension-language .foo bar",
3341 set_cmd_cfunc (c
, set_ext_lang_command
);
3343 add_info ("extensions", info_ext_lang_command
,
3344 "All filename extensions associated with a source language.");
3347 (add_set_cmd ("download-write-size", class_obscure
,
3348 var_integer
, (char *) &download_write_size
,
3349 "Set the write size used when downloading a program.\n"
3350 "Only used when downloading a program onto a remote\n"
3351 "target. Specify zero, or a negative value, to disable\n"
3352 "blocked writes. The actual size of each transfer is also\n"
3353 "limited by the size of the target packet and the memory\n"