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"
45 #include <readline/readline.h>
47 #include <sys/types.h>
49 #include "gdb_string.h"
60 /* Some HP-UX related globals to clear when a new "main"
61 symbol file is loaded. HP-specific. */
63 extern int hp_som_som_object_present
;
64 extern int hp_cxx_exception_support_initialized
;
65 #define RESET_HP_UX_GLOBALS() do {\
66 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
67 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
71 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
72 void (*show_load_progress
) (const char *section
,
73 unsigned long section_sent
,
74 unsigned long section_size
,
75 unsigned long total_sent
,
76 unsigned long total_size
);
77 void (*pre_add_symbol_hook
) (char *);
78 void (*post_add_symbol_hook
) (void);
79 void (*target_new_objfile_hook
) (struct objfile
*);
81 static void clear_symtab_users_cleanup (void *ignore
);
83 /* Global variables owned by this file */
84 int readnow_symbol_files
; /* Read full symbols immediately */
86 /* External variables and functions referenced. */
88 extern void report_transfer_performance (unsigned long, time_t, time_t);
90 /* Functions this file defines */
93 static int simple_read_overlay_region_table (void);
94 static void simple_free_overlay_region_table (void);
97 static void set_initial_language (void);
99 static void load_command (char *, int);
101 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
103 static void add_symbol_file_command (char *, int);
105 static void add_shared_symbol_files_command (char *, int);
107 static void cashier_psymtab (struct partial_symtab
*);
109 bfd
*symfile_bfd_open (char *);
111 int get_section_index (struct objfile
*, char *);
113 static void find_sym_fns (struct objfile
*);
115 static void decrement_reading_symtab (void *);
117 static void overlay_invalidate_all (void);
119 static int overlay_is_mapped (struct obj_section
*);
121 void list_overlays_command (char *, int);
123 void map_overlay_command (char *, int);
125 void unmap_overlay_command (char *, int);
127 static void overlay_auto_command (char *, int);
129 static void overlay_manual_command (char *, int);
131 static void overlay_off_command (char *, int);
133 static void overlay_load_command (char *, int);
135 static void overlay_command (char *, int);
137 static void simple_free_overlay_table (void);
139 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
141 static int simple_read_overlay_table (void);
143 static int simple_overlay_update_1 (struct obj_section
*);
145 static void add_filename_language (char *ext
, enum language lang
);
147 static void set_ext_lang_command (char *args
, int from_tty
);
149 static void info_ext_lang_command (char *args
, int from_tty
);
151 static void init_filename_language_table (void);
153 void _initialize_symfile (void);
155 /* List of all available sym_fns. On gdb startup, each object file reader
156 calls add_symtab_fns() to register information on each format it is
159 static struct sym_fns
*symtab_fns
= NULL
;
161 /* Flag for whether user will be reloading symbols multiple times.
162 Defaults to ON for VxWorks, otherwise OFF. */
164 #ifdef SYMBOL_RELOADING_DEFAULT
165 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
167 int symbol_reloading
= 0;
170 /* If non-zero, shared library symbols will be added automatically
171 when the inferior is created, new libraries are loaded, or when
172 attaching to the inferior. This is almost always what users will
173 want to have happen; but for very large programs, the startup time
174 will be excessive, and so if this is a problem, the user can clear
175 this flag and then add the shared library symbols as needed. Note
176 that there is a potential for confusion, since if the shared
177 library symbols are not loaded, commands like "info fun" will *not*
178 report all the functions that are actually present. */
180 int auto_solib_add
= 1;
182 /* For systems that support it, a threshold size in megabytes. If
183 automatically adding a new library's symbol table to those already
184 known to the debugger would cause the total shared library symbol
185 size to exceed this threshhold, then the shlib's symbols are not
186 added. The threshold is ignored if the user explicitly asks for a
187 shlib to be added, such as when using the "sharedlibrary"
190 int auto_solib_limit
;
193 /* Since this function is called from within qsort, in an ANSI environment
194 it must conform to the prototype for qsort, which specifies that the
195 comparison function takes two "void *" pointers. */
198 compare_symbols (const void *s1p
, const void *s2p
)
200 register struct symbol
**s1
, **s2
;
202 s1
= (struct symbol
**) s1p
;
203 s2
= (struct symbol
**) s2p
;
204 return (strcmp (SYMBOL_SOURCE_NAME (*s1
), SYMBOL_SOURCE_NAME (*s2
)));
211 compare_psymbols -- compare two partial symbols by name
215 Given pointers to pointers to two partial symbol table entries,
216 compare them by name and return -N, 0, or +N (ala strcmp).
217 Typically used by sorting routines like qsort().
221 Does direct compare of first two characters before punting
222 and passing to strcmp for longer compares. Note that the
223 original version had a bug whereby two null strings or two
224 identically named one character strings would return the
225 comparison of memory following the null byte.
230 compare_psymbols (const void *s1p
, const void *s2p
)
232 register struct partial_symbol
**s1
, **s2
;
233 register char *st1
, *st2
;
235 s1
= (struct partial_symbol
**) s1p
;
236 s2
= (struct partial_symbol
**) s2p
;
237 st1
= SYMBOL_SOURCE_NAME (*s1
);
238 st2
= SYMBOL_SOURCE_NAME (*s2
);
241 if ((st1
[0] - st2
[0]) || !st1
[0])
243 return (st1
[0] - st2
[0]);
245 else if ((st1
[1] - st2
[1]) || !st1
[1])
247 return (st1
[1] - st2
[1]);
251 return (strcmp (st1
, st2
));
256 sort_pst_symbols (struct partial_symtab
*pst
)
258 /* Sort the global list; don't sort the static list */
260 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
261 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
265 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
268 sort_block_syms (register struct block
*b
)
270 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
271 sizeof (struct symbol
*), compare_symbols
);
274 /* Call sort_symtab_syms to sort alphabetically
275 the symbols of each block of one symtab. */
278 sort_symtab_syms (register struct symtab
*s
)
280 register struct blockvector
*bv
;
283 register struct block
*b
;
287 bv
= BLOCKVECTOR (s
);
288 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
289 for (i
= 0; i
< nbl
; i
++)
291 b
= BLOCKVECTOR_BLOCK (bv
, i
);
292 if (BLOCK_SHOULD_SORT (b
))
297 /* Make a null terminated copy of the string at PTR with SIZE characters in
298 the obstack pointed to by OBSTACKP . Returns the address of the copy.
299 Note that the string at PTR does not have to be null terminated, I.E. it
300 may be part of a larger string and we are only saving a substring. */
303 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
305 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
306 /* Open-coded memcpy--saves function call time. These strings are usually
307 short. FIXME: Is this really still true with a compiler that can
310 register const char *p1
= ptr
;
311 register char *p2
= p
;
312 const char *end
= ptr
+ size
;
320 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
321 in the obstack pointed to by OBSTACKP. */
324 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
327 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
328 register char *val
= (char *) obstack_alloc (obstackp
, len
);
335 /* True if we are nested inside psymtab_to_symtab. */
337 int currently_reading_symtab
= 0;
340 decrement_reading_symtab (void *dummy
)
342 currently_reading_symtab
--;
345 /* Get the symbol table that corresponds to a partial_symtab.
346 This is fast after the first time you do it. In fact, there
347 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
351 psymtab_to_symtab (register struct partial_symtab
*pst
)
353 /* If it's been looked up before, return it. */
357 /* If it has not yet been read in, read it. */
360 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
361 currently_reading_symtab
++;
362 (*pst
->read_symtab
) (pst
);
363 do_cleanups (back_to
);
369 /* Initialize entry point information for this objfile. */
372 init_entry_point_info (struct objfile
*objfile
)
374 /* Save startup file's range of PC addresses to help blockframe.c
375 decide where the bottom of the stack is. */
377 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
379 /* Executable file -- record its entry point so we'll recognize
380 the startup file because it contains the entry point. */
381 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
385 /* Examination of non-executable.o files. Short-circuit this stuff. */
386 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
388 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
389 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
390 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
391 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
392 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
393 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
396 /* Get current entry point address. */
399 entry_point_address (void)
401 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
404 /* Remember the lowest-addressed loadable section we've seen.
405 This function is called via bfd_map_over_sections.
407 In case of equal vmas, the section with the largest size becomes the
408 lowest-addressed loadable section.
410 If the vmas and sizes are equal, the last section is considered the
411 lowest-addressed loadable section. */
414 find_lowest_section (bfd
*abfd
, asection
*sect
, PTR obj
)
416 asection
**lowest
= (asection
**) obj
;
418 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
421 *lowest
= sect
; /* First loadable section */
422 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
423 *lowest
= sect
; /* A lower loadable section */
424 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
425 && (bfd_section_size (abfd
, (*lowest
))
426 <= bfd_section_size (abfd
, sect
)))
431 /* Build (allocate and populate) a section_addr_info struct from
432 an existing section table. */
434 extern struct section_addr_info
*
435 build_section_addr_info_from_section_table (const struct section_table
*start
,
436 const struct section_table
*end
)
438 struct section_addr_info
*sap
;
439 const struct section_table
*stp
;
442 sap
= xmalloc (sizeof (struct section_addr_info
));
443 memset (sap
, 0, sizeof (struct section_addr_info
));
445 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
447 if (bfd_get_section_flags (stp
->bfd
,
448 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
449 && oidx
< MAX_SECTIONS
)
451 sap
->other
[oidx
].addr
= stp
->addr
;
452 sap
->other
[oidx
].name
453 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
454 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
463 /* Free all memory allocated by build_section_addr_info_from_section_table. */
466 free_section_addr_info (struct section_addr_info
*sap
)
470 for (idx
= 0; idx
< MAX_SECTIONS
; idx
++)
471 if (sap
->other
[idx
].name
)
472 xfree (sap
->other
[idx
].name
);
477 /* Initialize OBJFILE's sect_index_* members. */
479 init_objfile_sect_indices (struct objfile
*objfile
)
484 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
486 objfile
->sect_index_text
= sect
->index
;
488 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
490 objfile
->sect_index_data
= sect
->index
;
492 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
494 objfile
->sect_index_bss
= sect
->index
;
496 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
498 objfile
->sect_index_rodata
= sect
->index
;
500 /* This is where things get really weird... We MUST have valid
501 indices for the various sect_index_* members or gdb will abort.
502 So if for example, there is no ".text" section, we have to
503 accomodate that. Except when explicitly adding symbol files at
504 some address, section_offsets contains nothing but zeros, so it
505 doesn't matter which slot in section_offsets the individual
506 sect_index_* members index into. So if they are all zero, it is
507 safe to just point all the currently uninitialized indices to the
510 for (i
= 0; i
< objfile
->num_sections
; i
++)
512 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
517 if (i
== objfile
->num_sections
)
519 if (objfile
->sect_index_text
== -1)
520 objfile
->sect_index_text
= 0;
521 if (objfile
->sect_index_data
== -1)
522 objfile
->sect_index_data
= 0;
523 if (objfile
->sect_index_bss
== -1)
524 objfile
->sect_index_bss
= 0;
525 if (objfile
->sect_index_rodata
== -1)
526 objfile
->sect_index_rodata
= 0;
531 /* Parse the user's idea of an offset for dynamic linking, into our idea
532 of how to represent it for fast symbol reading. This is the default
533 version of the sym_fns.sym_offsets function for symbol readers that
534 don't need to do anything special. It allocates a section_offsets table
535 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
538 default_symfile_offsets (struct objfile
*objfile
,
539 struct section_addr_info
*addrs
)
543 objfile
->num_sections
= SECT_OFF_MAX
;
544 objfile
->section_offsets
= (struct section_offsets
*)
545 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
546 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
548 /* Now calculate offsets for section that were specified by the
550 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
552 struct other_sections
*osp
;
554 osp
= &addrs
->other
[i
] ;
558 /* Record all sections in offsets */
559 /* The section_offsets in the objfile are here filled in using
561 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
564 /* Remember the bfd indexes for the .text, .data, .bss and
566 init_objfile_sect_indices (objfile
);
570 /* Process a symbol file, as either the main file or as a dynamically
573 OBJFILE is where the symbols are to be read from.
575 ADDR is the address where the text segment was loaded, unless the
576 objfile is the main symbol file, in which case it is zero.
578 MAINLINE is nonzero if this is the main symbol file, or zero if
579 it's an extra symbol file such as dynamically loaded code.
581 VERBO is nonzero if the caller has printed a verbose message about
582 the symbol reading (and complaints can be more terse about it). */
585 syms_from_objfile (struct objfile
*objfile
, struct section_addr_info
*addrs
,
586 int mainline
, int verbo
)
588 asection
*lower_sect
;
590 CORE_ADDR lower_offset
;
591 struct section_addr_info local_addr
;
592 struct cleanup
*old_chain
;
595 /* If ADDRS is NULL, initialize the local section_addr_info struct and
596 point ADDRS to it. We now establish the convention that an addr of
597 zero means no load address was specified. */
601 memset (&local_addr
, 0, sizeof (local_addr
));
605 init_entry_point_info (objfile
);
606 find_sym_fns (objfile
);
608 if (objfile
->sf
== NULL
)
609 return; /* No symbols. */
611 /* Make sure that partially constructed symbol tables will be cleaned up
612 if an error occurs during symbol reading. */
613 old_chain
= make_cleanup_free_objfile (objfile
);
617 /* We will modify the main symbol table, make sure that all its users
618 will be cleaned up if an error occurs during symbol reading. */
619 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
621 /* Since no error yet, throw away the old symbol table. */
623 if (symfile_objfile
!= NULL
)
625 free_objfile (symfile_objfile
);
626 symfile_objfile
= NULL
;
629 /* Currently we keep symbols from the add-symbol-file command.
630 If the user wants to get rid of them, they should do "symbol-file"
631 without arguments first. Not sure this is the best behavior
634 (*objfile
->sf
->sym_new_init
) (objfile
);
637 /* Convert addr into an offset rather than an absolute address.
638 We find the lowest address of a loaded segment in the objfile,
639 and assume that <addr> is where that got loaded.
641 We no longer warn if the lowest section is not a text segment (as
642 happens for the PA64 port. */
645 /* Find lowest loadable section to be used as starting point for
646 continguous sections. FIXME!! won't work without call to find
647 .text first, but this assumes text is lowest section. */
648 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
649 if (lower_sect
== NULL
)
650 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
652 if (lower_sect
== NULL
)
653 warning ("no loadable sections found in added symbol-file %s",
656 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
657 warning ("Lowest section in %s is %s at %s",
659 bfd_section_name (objfile
->obfd
, lower_sect
),
660 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
661 if (lower_sect
!= NULL
)
662 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
666 /* Calculate offsets for the loadable sections.
667 FIXME! Sections must be in order of increasing loadable section
668 so that contiguous sections can use the lower-offset!!!
670 Adjust offsets if the segments are not contiguous.
671 If the section is contiguous, its offset should be set to
672 the offset of the highest loadable section lower than it
673 (the loadable section directly below it in memory).
674 this_offset = lower_offset = lower_addr - lower_orig_addr */
676 /* Calculate offsets for sections. */
677 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
679 if (addrs
->other
[i
].addr
!= 0)
681 sect
= bfd_get_section_by_name (objfile
->obfd
,
682 addrs
->other
[i
].name
);
686 -= bfd_section_vma (objfile
->obfd
, sect
);
687 lower_offset
= addrs
->other
[i
].addr
;
688 /* This is the index used by BFD. */
689 addrs
->other
[i
].sectindex
= sect
->index
;
693 warning ("section %s not found in %s", addrs
->other
[i
].name
,
695 addrs
->other
[i
].addr
= 0;
699 addrs
->other
[i
].addr
= lower_offset
;
703 /* Initialize symbol reading routines for this objfile, allow complaints to
704 appear for this new file, and record how verbose to be, then do the
705 initial symbol reading for this file. */
707 (*objfile
->sf
->sym_init
) (objfile
);
708 clear_complaints (&symfile_complaints
, 1, verbo
);
710 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
712 #ifndef IBM6000_TARGET
713 /* This is a SVR4/SunOS specific hack, I think. In any event, it
714 screws RS/6000. sym_offsets should be doing this sort of thing,
715 because it knows the mapping between bfd sections and
717 /* This is a hack. As far as I can tell, section offsets are not
718 target dependent. They are all set to addr with a couple of
719 exceptions. The exceptions are sysvr4 shared libraries, whose
720 offsets are kept in solib structures anyway and rs6000 xcoff
721 which handles shared libraries in a completely unique way.
723 Section offsets are built similarly, except that they are built
724 by adding addr in all cases because there is no clear mapping
725 from section_offsets into actual sections. Note that solib.c
726 has a different algorithm for finding section offsets.
728 These should probably all be collapsed into some target
729 independent form of shared library support. FIXME. */
733 struct obj_section
*s
;
735 /* Map section offsets in "addr" back to the object's
736 sections by comparing the section names with bfd's
737 section names. Then adjust the section address by
738 the offset. */ /* for gdb/13815 */
740 ALL_OBJFILE_OSECTIONS (objfile
, s
)
742 CORE_ADDR s_addr
= 0;
746 !s_addr
&& i
< MAX_SECTIONS
&& addrs
->other
[i
].name
;
748 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
750 addrs
->other
[i
].name
) == 0)
751 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
753 s
->addr
-= s
->offset
;
755 s
->endaddr
-= s
->offset
;
756 s
->endaddr
+= s_addr
;
760 #endif /* not IBM6000_TARGET */
762 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
764 if (!have_partial_symbols () && !have_full_symbols ())
767 printf_filtered ("(no debugging symbols found)...");
771 /* Don't allow char * to have a typename (else would get caddr_t).
772 Ditto void *. FIXME: Check whether this is now done by all the
773 symbol readers themselves (many of them now do), and if so remove
776 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
777 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
779 /* Mark the objfile has having had initial symbol read attempted. Note
780 that this does not mean we found any symbols... */
782 objfile
->flags
|= OBJF_SYMS
;
784 /* Discard cleanups as symbol reading was successful. */
786 discard_cleanups (old_chain
);
788 /* Call this after reading in a new symbol table to give target
789 dependent code a crack at the new symbols. For instance, this
790 could be used to update the values of target-specific symbols GDB
791 needs to keep track of (such as _sigtramp, or whatever). */
793 TARGET_SYMFILE_POSTREAD (objfile
);
796 /* Perform required actions after either reading in the initial
797 symbols for a new objfile, or mapping in the symbols from a reusable
801 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
804 /* If this is the main symbol file we have to clean up all users of the
805 old main symbol file. Otherwise it is sufficient to fixup all the
806 breakpoints that may have been redefined by this symbol file. */
809 /* OK, make it the "real" symbol file. */
810 symfile_objfile
= objfile
;
812 clear_symtab_users ();
816 breakpoint_re_set ();
819 /* We're done reading the symbol file; finish off complaints. */
820 clear_complaints (&symfile_complaints
, 0, verbo
);
823 /* Process a symbol file, as either the main file or as a dynamically
826 NAME is the file name (which will be tilde-expanded and made
827 absolute herein) (but we don't free or modify NAME itself).
828 FROM_TTY says how verbose to be. MAINLINE specifies whether this
829 is the main symbol file, or whether it's an extra symbol file such
830 as dynamically loaded code. If !mainline, ADDR is the address
831 where the text segment was loaded.
833 Upon success, returns a pointer to the objfile that was added.
834 Upon failure, jumps back to command level (never returns). */
837 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
838 int mainline
, int flags
)
840 struct objfile
*objfile
;
841 struct partial_symtab
*psymtab
;
844 /* Open a bfd for the file, and give user a chance to burp if we'd be
845 interactively wiping out any existing symbols. */
847 abfd
= symfile_bfd_open (name
);
849 if ((have_full_symbols () || have_partial_symbols ())
852 && !query ("Load new symbol table from \"%s\"? ", name
))
853 error ("Not confirmed.");
855 objfile
= allocate_objfile (abfd
, flags
);
857 /* If the objfile uses a mapped symbol file, and we have a psymtab for
858 it, then skip reading any symbols at this time. */
860 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
862 /* We mapped in an existing symbol table file that already has had
863 initial symbol reading performed, so we can skip that part. Notify
864 the user that instead of reading the symbols, they have been mapped.
866 if (from_tty
|| info_verbose
)
868 printf_filtered ("Mapped symbols for %s...", name
);
870 gdb_flush (gdb_stdout
);
872 init_entry_point_info (objfile
);
873 find_sym_fns (objfile
);
877 /* We either created a new mapped symbol table, mapped an existing
878 symbol table file which has not had initial symbol reading
879 performed, or need to read an unmapped symbol table. */
880 if (from_tty
|| info_verbose
)
882 if (pre_add_symbol_hook
)
883 pre_add_symbol_hook (name
);
886 printf_filtered ("Reading symbols from %s...", name
);
888 gdb_flush (gdb_stdout
);
891 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
894 /* We now have at least a partial symbol table. Check to see if the
895 user requested that all symbols be read on initial access via either
896 the gdb startup command line or on a per symbol file basis. Expand
897 all partial symbol tables for this objfile if so. */
899 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
901 if (from_tty
|| info_verbose
)
903 printf_filtered ("expanding to full symbols...");
905 gdb_flush (gdb_stdout
);
908 for (psymtab
= objfile
->psymtabs
;
910 psymtab
= psymtab
->next
)
912 psymtab_to_symtab (psymtab
);
916 if (from_tty
|| info_verbose
)
918 if (post_add_symbol_hook
)
919 post_add_symbol_hook ();
922 printf_filtered ("done.\n");
926 /* We print some messages regardless of whether 'from_tty ||
927 info_verbose' is true, so make sure they go out at the right
929 gdb_flush (gdb_stdout
);
931 if (objfile
->sf
== NULL
)
932 return objfile
; /* No symbols. */
934 new_symfile_objfile (objfile
, mainline
, from_tty
);
936 if (target_new_objfile_hook
)
937 target_new_objfile_hook (objfile
);
942 /* Call symbol_file_add() with default values and update whatever is
943 affected by the loading of a new main().
944 Used when the file is supplied in the gdb command line
945 and by some targets with special loading requirements.
946 The auxiliary function, symbol_file_add_main_1(), has the flags
947 argument for the switches that can only be specified in the symbol_file
951 symbol_file_add_main (char *args
, int from_tty
)
953 symbol_file_add_main_1 (args
, from_tty
, 0);
957 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
959 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
962 RESET_HP_UX_GLOBALS ();
965 /* Getting new symbols may change our opinion about
966 what is frameless. */
967 reinit_frame_cache ();
969 set_initial_language ();
973 symbol_file_clear (int from_tty
)
975 if ((have_full_symbols () || have_partial_symbols ())
977 && !query ("Discard symbol table from `%s'? ",
978 symfile_objfile
->name
))
979 error ("Not confirmed.");
980 free_all_objfiles ();
982 /* solib descriptors may have handles to objfiles. Since their
983 storage has just been released, we'd better wipe the solib
986 #if defined(SOLIB_RESTART)
990 symfile_objfile
= NULL
;
992 printf_unfiltered ("No symbol file now.\n");
994 RESET_HP_UX_GLOBALS ();
998 /* This is the symbol-file command. Read the file, analyze its
999 symbols, and add a struct symtab to a symtab list. The syntax of
1000 the command is rather bizarre--(1) buildargv implements various
1001 quoting conventions which are undocumented and have little or
1002 nothing in common with the way things are quoted (or not quoted)
1003 elsewhere in GDB, (2) options are used, which are not generally
1004 used in GDB (perhaps "set mapped on", "set readnow on" would be
1005 better), (3) the order of options matters, which is contrary to GNU
1006 conventions (because it is confusing and inconvenient). */
1007 /* Note: ezannoni 2000-04-17. This function used to have support for
1008 rombug (see remote-os9k.c). It consisted of a call to target_link()
1009 (target.c) to get the address of the text segment from the target,
1010 and pass that to symbol_file_add(). This is no longer supported. */
1013 symbol_file_command (char *args
, int from_tty
)
1017 struct cleanup
*cleanups
;
1018 int flags
= OBJF_USERLOADED
;
1024 symbol_file_clear (from_tty
);
1028 if ((argv
= buildargv (args
)) == NULL
)
1032 cleanups
= make_cleanup_freeargv (argv
);
1033 while (*argv
!= NULL
)
1035 if (STREQ (*argv
, "-mapped"))
1036 flags
|= OBJF_MAPPED
;
1038 if (STREQ (*argv
, "-readnow"))
1039 flags
|= OBJF_READNOW
;
1042 error ("unknown option `%s'", *argv
);
1047 symbol_file_add_main_1 (name
, from_tty
, flags
);
1054 error ("no symbol file name was specified");
1056 do_cleanups (cleanups
);
1060 /* Set the initial language.
1062 A better solution would be to record the language in the psymtab when reading
1063 partial symbols, and then use it (if known) to set the language. This would
1064 be a win for formats that encode the language in an easily discoverable place,
1065 such as DWARF. For stabs, we can jump through hoops looking for specially
1066 named symbols or try to intuit the language from the specific type of stabs
1067 we find, but we can't do that until later when we read in full symbols.
1071 set_initial_language (void)
1073 struct partial_symtab
*pst
;
1074 enum language lang
= language_unknown
;
1076 pst
= find_main_psymtab ();
1079 if (pst
->filename
!= NULL
)
1081 lang
= deduce_language_from_filename (pst
->filename
);
1083 if (lang
== language_unknown
)
1085 /* Make C the default language */
1088 set_language (lang
);
1089 expected_language
= current_language
; /* Don't warn the user */
1093 /* Open file specified by NAME and hand it off to BFD for preliminary
1094 analysis. Result is a newly initialized bfd *, which includes a newly
1095 malloc'd` copy of NAME (tilde-expanded and made absolute).
1096 In case of trouble, error() is called. */
1099 symfile_bfd_open (char *name
)
1103 char *absolute_name
;
1107 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1109 /* Look down path for it, allocate 2nd new malloc'd copy. */
1110 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1111 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1114 char *exename
= alloca (strlen (name
) + 5);
1115 strcat (strcpy (exename
, name
), ".exe");
1116 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1122 make_cleanup (xfree
, name
);
1123 perror_with_name (name
);
1125 xfree (name
); /* Free 1st new malloc'd copy */
1126 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1127 /* It'll be freed in free_objfile(). */
1129 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1133 make_cleanup (xfree
, name
);
1134 error ("\"%s\": can't open to read symbols: %s.", name
,
1135 bfd_errmsg (bfd_get_error ()));
1137 sym_bfd
->cacheable
= 1;
1139 if (!bfd_check_format (sym_bfd
, bfd_object
))
1141 /* FIXME: should be checking for errors from bfd_close (for one thing,
1142 on error it does not free all the storage associated with the
1144 bfd_close (sym_bfd
); /* This also closes desc */
1145 make_cleanup (xfree
, name
);
1146 error ("\"%s\": can't read symbols: %s.", name
,
1147 bfd_errmsg (bfd_get_error ()));
1152 /* Return the section index for the given section name. Return -1 if
1153 the section was not found. */
1155 get_section_index (struct objfile
*objfile
, char *section_name
)
1157 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1164 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1165 startup by the _initialize routine in each object file format reader,
1166 to register information about each format the the reader is prepared
1170 add_symtab_fns (struct sym_fns
*sf
)
1172 sf
->next
= symtab_fns
;
1177 /* Initialize to read symbols from the symbol file sym_bfd. It either
1178 returns or calls error(). The result is an initialized struct sym_fns
1179 in the objfile structure, that contains cached information about the
1183 find_sym_fns (struct objfile
*objfile
)
1186 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1187 char *our_target
= bfd_get_target (objfile
->obfd
);
1189 if (our_flavour
== bfd_target_srec_flavour
1190 || our_flavour
== bfd_target_ihex_flavour
1191 || our_flavour
== bfd_target_tekhex_flavour
)
1192 return; /* No symbols. */
1194 /* Special kludge for apollo. See dstread.c. */
1195 if (STREQN (our_target
, "apollo", 6))
1196 our_flavour
= (enum bfd_flavour
) -2;
1198 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1200 if (our_flavour
== sf
->sym_flavour
)
1206 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1207 bfd_get_target (objfile
->obfd
));
1210 /* This function runs the load command of our current target. */
1213 load_command (char *arg
, int from_tty
)
1216 arg
= get_exec_file (1);
1217 target_load (arg
, from_tty
);
1219 /* After re-loading the executable, we don't really know which
1220 overlays are mapped any more. */
1221 overlay_cache_invalid
= 1;
1224 /* This version of "load" should be usable for any target. Currently
1225 it is just used for remote targets, not inftarg.c or core files,
1226 on the theory that only in that case is it useful.
1228 Avoiding xmodem and the like seems like a win (a) because we don't have
1229 to worry about finding it, and (b) On VMS, fork() is very slow and so
1230 we don't want to run a subprocess. On the other hand, I'm not sure how
1231 performance compares. */
1233 static int download_write_size
= 512;
1234 static int validate_download
= 0;
1236 /* Callback service function for generic_load (bfd_map_over_sections). */
1239 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1241 bfd_size_type
*sum
= data
;
1243 *sum
+= bfd_get_section_size_before_reloc (asec
);
1246 /* Opaque data for load_section_callback. */
1247 struct load_section_data
{
1248 unsigned long load_offset
;
1249 unsigned long write_count
;
1250 unsigned long data_count
;
1251 bfd_size_type total_size
;
1254 /* Callback service function for generic_load (bfd_map_over_sections). */
1257 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1259 struct load_section_data
*args
= data
;
1261 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1263 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1267 struct cleanup
*old_chain
;
1268 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1269 bfd_size_type block_size
;
1271 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1274 if (download_write_size
> 0 && size
> download_write_size
)
1275 block_size
= download_write_size
;
1279 buffer
= xmalloc (size
);
1280 old_chain
= make_cleanup (xfree
, buffer
);
1282 /* Is this really necessary? I guess it gives the user something
1283 to look at during a long download. */
1284 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1285 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1287 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1293 bfd_size_type this_transfer
= size
- sent
;
1295 if (this_transfer
>= block_size
)
1296 this_transfer
= block_size
;
1297 len
= target_write_memory_partial (lma
, buffer
,
1298 this_transfer
, &err
);
1301 if (validate_download
)
1303 /* Broken memories and broken monitors manifest
1304 themselves here when bring new computers to
1305 life. This doubles already slow downloads. */
1306 /* NOTE: cagney/1999-10-18: A more efficient
1307 implementation might add a verify_memory()
1308 method to the target vector and then use
1309 that. remote.c could implement that method
1310 using the ``qCRC'' packet. */
1311 char *check
= xmalloc (len
);
1312 struct cleanup
*verify_cleanups
=
1313 make_cleanup (xfree
, check
);
1315 if (target_read_memory (lma
, check
, len
) != 0)
1316 error ("Download verify read failed at 0x%s",
1318 if (memcmp (buffer
, check
, len
) != 0)
1319 error ("Download verify compare failed at 0x%s",
1321 do_cleanups (verify_cleanups
);
1323 args
->data_count
+= len
;
1326 args
->write_count
+= 1;
1329 || (ui_load_progress_hook
!= NULL
1330 && ui_load_progress_hook (sect_name
, sent
)))
1331 error ("Canceled the download");
1333 if (show_load_progress
!= NULL
)
1334 show_load_progress (sect_name
, sent
, size
,
1335 args
->data_count
, args
->total_size
);
1337 while (sent
< size
);
1340 error ("Memory access error while loading section %s.", sect_name
);
1342 do_cleanups (old_chain
);
1348 generic_load (char *args
, int from_tty
)
1352 time_t start_time
, end_time
; /* Start and end times of download */
1354 struct cleanup
*old_cleanups
;
1356 struct load_section_data cbdata
;
1359 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1360 cbdata
.write_count
= 0; /* Number of writes needed. */
1361 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1362 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1364 /* Parse the input argument - the user can specify a load offset as
1365 a second argument. */
1366 filename
= xmalloc (strlen (args
) + 1);
1367 old_cleanups
= make_cleanup (xfree
, filename
);
1368 strcpy (filename
, args
);
1369 offptr
= strchr (filename
, ' ');
1374 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1375 if (offptr
== endptr
)
1376 error ("Invalid download offset:%s\n", offptr
);
1380 cbdata
.load_offset
= 0;
1382 /* Open the file for loading. */
1383 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1384 if (loadfile_bfd
== NULL
)
1386 perror_with_name (filename
);
1390 /* FIXME: should be checking for errors from bfd_close (for one thing,
1391 on error it does not free all the storage associated with the
1393 make_cleanup_bfd_close (loadfile_bfd
);
1395 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1397 error ("\"%s\" is not an object file: %s", filename
,
1398 bfd_errmsg (bfd_get_error ()));
1401 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1402 (void *) &cbdata
.total_size
);
1404 start_time
= time (NULL
);
1406 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1408 end_time
= time (NULL
);
1410 entry
= bfd_get_start_address (loadfile_bfd
);
1411 ui_out_text (uiout
, "Start address ");
1412 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1413 ui_out_text (uiout
, ", load size ");
1414 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1415 ui_out_text (uiout
, "\n");
1416 /* We were doing this in remote-mips.c, I suspect it is right
1417 for other targets too. */
1420 /* FIXME: are we supposed to call symbol_file_add or not? According to
1421 a comment from remote-mips.c (where a call to symbol_file_add was
1422 commented out), making the call confuses GDB if more than one file is
1423 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1426 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1427 cbdata
.write_count
, end_time
- start_time
);
1429 do_cleanups (old_cleanups
);
1432 /* Report how fast the transfer went. */
1434 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1435 replaced by print_transfer_performance (with a very different
1436 function signature). */
1439 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1442 print_transfer_performance (gdb_stdout
, data_count
,
1443 end_time
- start_time
, 0);
1447 print_transfer_performance (struct ui_file
*stream
,
1448 unsigned long data_count
,
1449 unsigned long write_count
,
1450 unsigned long time_count
)
1452 ui_out_text (uiout
, "Transfer rate: ");
1455 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1456 (data_count
* 8) / time_count
);
1457 ui_out_text (uiout
, " bits/sec");
1461 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1462 ui_out_text (uiout
, " bits in <1 sec");
1464 if (write_count
> 0)
1466 ui_out_text (uiout
, ", ");
1467 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1468 ui_out_text (uiout
, " bytes/write");
1470 ui_out_text (uiout
, ".\n");
1473 /* This function allows the addition of incrementally linked object files.
1474 It does not modify any state in the target, only in the debugger. */
1475 /* Note: ezannoni 2000-04-13 This function/command used to have a
1476 special case syntax for the rombug target (Rombug is the boot
1477 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1478 rombug case, the user doesn't need to supply a text address,
1479 instead a call to target_link() (in target.c) would supply the
1480 value to use. We are now discontinuing this type of ad hoc syntax. */
1484 add_symbol_file_command (char *args
, int from_tty
)
1486 char *filename
= NULL
;
1487 int flags
= OBJF_USERLOADED
;
1489 int expecting_option
= 0;
1490 int section_index
= 0;
1494 int expecting_sec_name
= 0;
1495 int expecting_sec_addr
= 0;
1501 } sect_opts
[SECT_OFF_MAX
];
1503 struct section_addr_info section_addrs
;
1504 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1509 error ("add-symbol-file takes a file name and an address");
1511 /* Make a copy of the string that we can safely write into. */
1512 args
= xstrdup (args
);
1514 /* Ensure section_addrs is initialized */
1515 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1517 while (*args
!= '\000')
1519 /* Any leading spaces? */
1520 while (isspace (*args
))
1523 /* Point arg to the beginning of the argument. */
1526 /* Move args pointer over the argument. */
1527 while ((*args
!= '\000') && !isspace (*args
))
1530 /* If there are more arguments, terminate arg and
1532 if (*args
!= '\000')
1535 /* Now process the argument. */
1538 /* The first argument is the file name. */
1539 filename
= tilde_expand (arg
);
1540 make_cleanup (xfree
, filename
);
1545 /* The second argument is always the text address at which
1546 to load the program. */
1547 sect_opts
[section_index
].name
= ".text";
1548 sect_opts
[section_index
].value
= arg
;
1553 /* It's an option (starting with '-') or it's an argument
1558 if (strcmp (arg
, "-mapped") == 0)
1559 flags
|= OBJF_MAPPED
;
1561 if (strcmp (arg
, "-readnow") == 0)
1562 flags
|= OBJF_READNOW
;
1564 if (strcmp (arg
, "-s") == 0)
1566 if (section_index
>= SECT_OFF_MAX
)
1567 error ("Too many sections specified.");
1568 expecting_sec_name
= 1;
1569 expecting_sec_addr
= 1;
1574 if (expecting_sec_name
)
1576 sect_opts
[section_index
].name
= arg
;
1577 expecting_sec_name
= 0;
1580 if (expecting_sec_addr
)
1582 sect_opts
[section_index
].value
= arg
;
1583 expecting_sec_addr
= 0;
1587 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1593 /* Print the prompt for the query below. And save the arguments into
1594 a sect_addr_info structure to be passed around to other
1595 functions. We have to split this up into separate print
1596 statements because local_hex_string returns a local static
1599 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1600 for (i
= 0; i
< section_index
; i
++)
1603 char *val
= sect_opts
[i
].value
;
1604 char *sec
= sect_opts
[i
].name
;
1606 val
= sect_opts
[i
].value
;
1607 if (val
[0] == '0' && val
[1] == 'x')
1608 addr
= strtoul (val
+2, NULL
, 16);
1610 addr
= strtoul (val
, NULL
, 10);
1612 /* Here we store the section offsets in the order they were
1613 entered on the command line. */
1614 section_addrs
.other
[sec_num
].name
= sec
;
1615 section_addrs
.other
[sec_num
].addr
= addr
;
1616 printf_filtered ("\t%s_addr = %s\n",
1618 local_hex_string ((unsigned long)addr
));
1621 /* The object's sections are initialized when a
1622 call is made to build_objfile_section_table (objfile).
1623 This happens in reread_symbols.
1624 At this point, we don't know what file type this is,
1625 so we can't determine what section names are valid. */
1628 if (from_tty
&& (!query ("%s", "")))
1629 error ("Not confirmed.");
1631 symbol_file_add (filename
, from_tty
, §ion_addrs
, 0, flags
);
1633 /* Getting new symbols may change our opinion about what is
1635 reinit_frame_cache ();
1636 do_cleanups (my_cleanups
);
1640 add_shared_symbol_files_command (char *args
, int from_tty
)
1642 #ifdef ADD_SHARED_SYMBOL_FILES
1643 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1645 error ("This command is not available in this configuration of GDB.");
1649 /* Re-read symbols if a symbol-file has changed. */
1651 reread_symbols (void)
1653 struct objfile
*objfile
;
1656 struct stat new_statbuf
;
1659 /* With the addition of shared libraries, this should be modified,
1660 the load time should be saved in the partial symbol tables, since
1661 different tables may come from different source files. FIXME.
1662 This routine should then walk down each partial symbol table
1663 and see if the symbol table that it originates from has been changed */
1665 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1669 #ifdef IBM6000_TARGET
1670 /* If this object is from a shared library, then you should
1671 stat on the library name, not member name. */
1673 if (objfile
->obfd
->my_archive
)
1674 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1677 res
= stat (objfile
->name
, &new_statbuf
);
1680 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1681 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1685 new_modtime
= new_statbuf
.st_mtime
;
1686 if (new_modtime
!= objfile
->mtime
)
1688 struct cleanup
*old_cleanups
;
1689 struct section_offsets
*offsets
;
1691 char *obfd_filename
;
1693 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1696 /* There are various functions like symbol_file_add,
1697 symfile_bfd_open, syms_from_objfile, etc., which might
1698 appear to do what we want. But they have various other
1699 effects which we *don't* want. So we just do stuff
1700 ourselves. We don't worry about mapped files (for one thing,
1701 any mapped file will be out of date). */
1703 /* If we get an error, blow away this objfile (not sure if
1704 that is the correct response for things like shared
1706 old_cleanups
= make_cleanup_free_objfile (objfile
);
1707 /* We need to do this whenever any symbols go away. */
1708 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1710 /* Clean up any state BFD has sitting around. We don't need
1711 to close the descriptor but BFD lacks a way of closing the
1712 BFD without closing the descriptor. */
1713 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1714 if (!bfd_close (objfile
->obfd
))
1715 error ("Can't close BFD for %s: %s", objfile
->name
,
1716 bfd_errmsg (bfd_get_error ()));
1717 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1718 if (objfile
->obfd
== NULL
)
1719 error ("Can't open %s to read symbols.", objfile
->name
);
1720 /* bfd_openr sets cacheable to true, which is what we want. */
1721 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1722 error ("Can't read symbols from %s: %s.", objfile
->name
,
1723 bfd_errmsg (bfd_get_error ()));
1725 /* Save the offsets, we will nuke them with the rest of the
1727 num_offsets
= objfile
->num_sections
;
1728 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1729 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1731 /* Nuke all the state that we will re-read. Much of the following
1732 code which sets things to NULL really is necessary to tell
1733 other parts of GDB that there is nothing currently there. */
1735 /* FIXME: Do we have to free a whole linked list, or is this
1737 if (objfile
->global_psymbols
.list
)
1738 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1739 memset (&objfile
->global_psymbols
, 0,
1740 sizeof (objfile
->global_psymbols
));
1741 if (objfile
->static_psymbols
.list
)
1742 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1743 memset (&objfile
->static_psymbols
, 0,
1744 sizeof (objfile
->static_psymbols
));
1746 /* Free the obstacks for non-reusable objfiles */
1747 bcache_xfree (objfile
->psymbol_cache
);
1748 objfile
->psymbol_cache
= bcache_xmalloc ();
1749 bcache_xfree (objfile
->macro_cache
);
1750 objfile
->macro_cache
= bcache_xmalloc ();
1751 obstack_free (&objfile
->psymbol_obstack
, 0);
1752 obstack_free (&objfile
->symbol_obstack
, 0);
1753 obstack_free (&objfile
->type_obstack
, 0);
1754 objfile
->sections
= NULL
;
1755 objfile
->symtabs
= NULL
;
1756 objfile
->psymtabs
= NULL
;
1757 objfile
->free_psymtabs
= NULL
;
1758 objfile
->msymbols
= NULL
;
1759 objfile
->minimal_symbol_count
= 0;
1760 memset (&objfile
->msymbol_hash
, 0,
1761 sizeof (objfile
->msymbol_hash
));
1762 memset (&objfile
->msymbol_demangled_hash
, 0,
1763 sizeof (objfile
->msymbol_demangled_hash
));
1764 objfile
->fundamental_types
= NULL
;
1765 if (objfile
->sf
!= NULL
)
1767 (*objfile
->sf
->sym_finish
) (objfile
);
1770 /* We never make this a mapped file. */
1772 /* obstack_specify_allocation also initializes the obstack so
1774 objfile
->psymbol_cache
= bcache_xmalloc ();
1775 objfile
->macro_cache
= bcache_xmalloc ();
1776 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1778 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1780 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1782 if (build_objfile_section_table (objfile
))
1784 error ("Can't find the file sections in `%s': %s",
1785 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1788 /* We use the same section offsets as from last time. I'm not
1789 sure whether that is always correct for shared libraries. */
1790 objfile
->section_offsets
= (struct section_offsets
*)
1791 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1792 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1793 objfile
->num_sections
= num_offsets
;
1795 /* What the hell is sym_new_init for, anyway? The concept of
1796 distinguishing between the main file and additional files
1797 in this way seems rather dubious. */
1798 if (objfile
== symfile_objfile
)
1800 (*objfile
->sf
->sym_new_init
) (objfile
);
1802 RESET_HP_UX_GLOBALS ();
1806 (*objfile
->sf
->sym_init
) (objfile
);
1807 clear_complaints (&symfile_complaints
, 1, 1);
1808 /* The "mainline" parameter is a hideous hack; I think leaving it
1809 zero is OK since dbxread.c also does what it needs to do if
1810 objfile->global_psymbols.size is 0. */
1811 (*objfile
->sf
->sym_read
) (objfile
, 0);
1812 if (!have_partial_symbols () && !have_full_symbols ())
1815 printf_filtered ("(no debugging symbols found)\n");
1818 objfile
->flags
|= OBJF_SYMS
;
1820 /* We're done reading the symbol file; finish off complaints. */
1821 clear_complaints (&symfile_complaints
, 0, 1);
1823 /* Getting new symbols may change our opinion about what is
1826 reinit_frame_cache ();
1828 /* Discard cleanups as symbol reading was successful. */
1829 discard_cleanups (old_cleanups
);
1831 /* If the mtime has changed between the time we set new_modtime
1832 and now, we *want* this to be out of date, so don't call stat
1834 objfile
->mtime
= new_modtime
;
1837 /* Call this after reading in a new symbol table to give target
1838 dependent code a crack at the new symbols. For instance, this
1839 could be used to update the values of target-specific symbols GDB
1840 needs to keep track of (such as _sigtramp, or whatever). */
1842 TARGET_SYMFILE_POSTREAD (objfile
);
1848 clear_symtab_users ();
1860 static filename_language
*filename_language_table
;
1861 static int fl_table_size
, fl_table_next
;
1864 add_filename_language (char *ext
, enum language lang
)
1866 if (fl_table_next
>= fl_table_size
)
1868 fl_table_size
+= 10;
1869 filename_language_table
=
1870 xrealloc (filename_language_table
,
1871 fl_table_size
* sizeof (*filename_language_table
));
1874 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
1875 filename_language_table
[fl_table_next
].lang
= lang
;
1879 static char *ext_args
;
1882 set_ext_lang_command (char *args
, int from_tty
)
1885 char *cp
= ext_args
;
1888 /* First arg is filename extension, starting with '.' */
1890 error ("'%s': Filename extension must begin with '.'", ext_args
);
1892 /* Find end of first arg. */
1893 while (*cp
&& !isspace (*cp
))
1897 error ("'%s': two arguments required -- filename extension and language",
1900 /* Null-terminate first arg */
1903 /* Find beginning of second arg, which should be a source language. */
1904 while (*cp
&& isspace (*cp
))
1908 error ("'%s': two arguments required -- filename extension and language",
1911 /* Lookup the language from among those we know. */
1912 lang
= language_enum (cp
);
1914 /* Now lookup the filename extension: do we already know it? */
1915 for (i
= 0; i
< fl_table_next
; i
++)
1916 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1919 if (i
>= fl_table_next
)
1921 /* new file extension */
1922 add_filename_language (ext_args
, lang
);
1926 /* redefining a previously known filename extension */
1929 /* query ("Really make files of type %s '%s'?", */
1930 /* ext_args, language_str (lang)); */
1932 xfree (filename_language_table
[i
].ext
);
1933 filename_language_table
[i
].ext
= xstrdup (ext_args
);
1934 filename_language_table
[i
].lang
= lang
;
1939 info_ext_lang_command (char *args
, int from_tty
)
1943 printf_filtered ("Filename extensions and the languages they represent:");
1944 printf_filtered ("\n\n");
1945 for (i
= 0; i
< fl_table_next
; i
++)
1946 printf_filtered ("\t%s\t- %s\n",
1947 filename_language_table
[i
].ext
,
1948 language_str (filename_language_table
[i
].lang
));
1952 init_filename_language_table (void)
1954 if (fl_table_size
== 0) /* protect against repetition */
1958 filename_language_table
=
1959 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1960 add_filename_language (".c", language_c
);
1961 add_filename_language (".C", language_cplus
);
1962 add_filename_language (".cc", language_cplus
);
1963 add_filename_language (".cp", language_cplus
);
1964 add_filename_language (".cpp", language_cplus
);
1965 add_filename_language (".cxx", language_cplus
);
1966 add_filename_language (".c++", language_cplus
);
1967 add_filename_language (".java", language_java
);
1968 add_filename_language (".class", language_java
);
1969 add_filename_language (".m", language_objc
);
1970 add_filename_language (".f", language_fortran
);
1971 add_filename_language (".F", language_fortran
);
1972 add_filename_language (".s", language_asm
);
1973 add_filename_language (".S", language_asm
);
1974 add_filename_language (".pas", language_pascal
);
1975 add_filename_language (".p", language_pascal
);
1976 add_filename_language (".pp", language_pascal
);
1981 deduce_language_from_filename (char *filename
)
1986 if (filename
!= NULL
)
1987 if ((cp
= strrchr (filename
, '.')) != NULL
)
1988 for (i
= 0; i
< fl_table_next
; i
++)
1989 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
1990 return filename_language_table
[i
].lang
;
1992 return language_unknown
;
1997 Allocate and partly initialize a new symbol table. Return a pointer
1998 to it. error() if no space.
2000 Caller must set these fields:
2006 possibly free_named_symtabs (symtab->filename);
2010 allocate_symtab (char *filename
, struct objfile
*objfile
)
2012 register struct symtab
*symtab
;
2014 symtab
= (struct symtab
*)
2015 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
2016 memset (symtab
, 0, sizeof (*symtab
));
2017 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2018 &objfile
->symbol_obstack
);
2019 symtab
->fullname
= NULL
;
2020 symtab
->language
= deduce_language_from_filename (filename
);
2021 symtab
->debugformat
= obsavestring ("unknown", 7,
2022 &objfile
->symbol_obstack
);
2024 /* Hook it to the objfile it comes from */
2026 symtab
->objfile
= objfile
;
2027 symtab
->next
= objfile
->symtabs
;
2028 objfile
->symtabs
= symtab
;
2030 /* FIXME: This should go away. It is only defined for the Z8000,
2031 and the Z8000 definition of this macro doesn't have anything to
2032 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2033 here for convenience. */
2034 #ifdef INIT_EXTRA_SYMTAB_INFO
2035 INIT_EXTRA_SYMTAB_INFO (symtab
);
2041 struct partial_symtab
*
2042 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2044 struct partial_symtab
*psymtab
;
2046 if (objfile
->free_psymtabs
)
2048 psymtab
= objfile
->free_psymtabs
;
2049 objfile
->free_psymtabs
= psymtab
->next
;
2052 psymtab
= (struct partial_symtab
*)
2053 obstack_alloc (&objfile
->psymbol_obstack
,
2054 sizeof (struct partial_symtab
));
2056 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2057 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2058 &objfile
->psymbol_obstack
);
2059 psymtab
->symtab
= NULL
;
2061 /* Prepend it to the psymtab list for the objfile it belongs to.
2062 Psymtabs are searched in most recent inserted -> least recent
2065 psymtab
->objfile
= objfile
;
2066 psymtab
->next
= objfile
->psymtabs
;
2067 objfile
->psymtabs
= psymtab
;
2070 struct partial_symtab
**prev_pst
;
2071 psymtab
->objfile
= objfile
;
2072 psymtab
->next
= NULL
;
2073 prev_pst
= &(objfile
->psymtabs
);
2074 while ((*prev_pst
) != NULL
)
2075 prev_pst
= &((*prev_pst
)->next
);
2076 (*prev_pst
) = psymtab
;
2084 discard_psymtab (struct partial_symtab
*pst
)
2086 struct partial_symtab
**prev_pst
;
2089 Empty psymtabs happen as a result of header files which don't
2090 have any symbols in them. There can be a lot of them. But this
2091 check is wrong, in that a psymtab with N_SLINE entries but
2092 nothing else is not empty, but we don't realize that. Fixing
2093 that without slowing things down might be tricky. */
2095 /* First, snip it out of the psymtab chain */
2097 prev_pst
= &(pst
->objfile
->psymtabs
);
2098 while ((*prev_pst
) != pst
)
2099 prev_pst
= &((*prev_pst
)->next
);
2100 (*prev_pst
) = pst
->next
;
2102 /* Next, put it on a free list for recycling */
2104 pst
->next
= pst
->objfile
->free_psymtabs
;
2105 pst
->objfile
->free_psymtabs
= pst
;
2109 /* Reset all data structures in gdb which may contain references to symbol
2113 clear_symtab_users (void)
2115 /* Someday, we should do better than this, by only blowing away
2116 the things that really need to be blown. */
2117 clear_value_history ();
2119 clear_internalvars ();
2120 breakpoint_re_set ();
2121 set_default_breakpoint (0, 0, 0, 0);
2122 clear_current_source_symtab_and_line ();
2123 clear_pc_function_cache ();
2124 if (target_new_objfile_hook
)
2125 target_new_objfile_hook (NULL
);
2129 clear_symtab_users_cleanup (void *ignore
)
2131 clear_symtab_users ();
2134 /* clear_symtab_users_once:
2136 This function is run after symbol reading, or from a cleanup.
2137 If an old symbol table was obsoleted, the old symbol table
2138 has been blown away, but the other GDB data structures that may
2139 reference it have not yet been cleared or re-directed. (The old
2140 symtab was zapped, and the cleanup queued, in free_named_symtab()
2143 This function can be queued N times as a cleanup, or called
2144 directly; it will do all the work the first time, and then will be a
2145 no-op until the next time it is queued. This works by bumping a
2146 counter at queueing time. Much later when the cleanup is run, or at
2147 the end of symbol processing (in case the cleanup is discarded), if
2148 the queued count is greater than the "done-count", we do the work
2149 and set the done-count to the queued count. If the queued count is
2150 less than or equal to the done-count, we just ignore the call. This
2151 is needed because reading a single .o file will often replace many
2152 symtabs (one per .h file, for example), and we don't want to reset
2153 the breakpoints N times in the user's face.
2155 The reason we both queue a cleanup, and call it directly after symbol
2156 reading, is because the cleanup protects us in case of errors, but is
2157 discarded if symbol reading is successful. */
2160 /* FIXME: As free_named_symtabs is currently a big noop this function
2161 is no longer needed. */
2162 static void clear_symtab_users_once (void);
2164 static int clear_symtab_users_queued
;
2165 static int clear_symtab_users_done
;
2168 clear_symtab_users_once (void)
2170 /* Enforce once-per-`do_cleanups'-semantics */
2171 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2173 clear_symtab_users_done
= clear_symtab_users_queued
;
2175 clear_symtab_users ();
2179 /* Delete the specified psymtab, and any others that reference it. */
2182 cashier_psymtab (struct partial_symtab
*pst
)
2184 struct partial_symtab
*ps
, *pprev
= NULL
;
2187 /* Find its previous psymtab in the chain */
2188 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2197 /* Unhook it from the chain. */
2198 if (ps
== pst
->objfile
->psymtabs
)
2199 pst
->objfile
->psymtabs
= ps
->next
;
2201 pprev
->next
= ps
->next
;
2203 /* FIXME, we can't conveniently deallocate the entries in the
2204 partial_symbol lists (global_psymbols/static_psymbols) that
2205 this psymtab points to. These just take up space until all
2206 the psymtabs are reclaimed. Ditto the dependencies list and
2207 filename, which are all in the psymbol_obstack. */
2209 /* We need to cashier any psymtab that has this one as a dependency... */
2211 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2213 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2215 if (ps
->dependencies
[i
] == pst
)
2217 cashier_psymtab (ps
);
2218 goto again
; /* Must restart, chain has been munged. */
2225 /* If a symtab or psymtab for filename NAME is found, free it along
2226 with any dependent breakpoints, displays, etc.
2227 Used when loading new versions of object modules with the "add-file"
2228 command. This is only called on the top-level symtab or psymtab's name;
2229 it is not called for subsidiary files such as .h files.
2231 Return value is 1 if we blew away the environment, 0 if not.
2232 FIXME. The return value appears to never be used.
2234 FIXME. I think this is not the best way to do this. We should
2235 work on being gentler to the environment while still cleaning up
2236 all stray pointers into the freed symtab. */
2239 free_named_symtabs (char *name
)
2242 /* FIXME: With the new method of each objfile having it's own
2243 psymtab list, this function needs serious rethinking. In particular,
2244 why was it ever necessary to toss psymtabs with specific compilation
2245 unit filenames, as opposed to all psymtabs from a particular symbol
2247 Well, the answer is that some systems permit reloading of particular
2248 compilation units. We want to blow away any old info about these
2249 compilation units, regardless of which objfiles they arrived in. --gnu. */
2251 register struct symtab
*s
;
2252 register struct symtab
*prev
;
2253 register struct partial_symtab
*ps
;
2254 struct blockvector
*bv
;
2257 /* We only wack things if the symbol-reload switch is set. */
2258 if (!symbol_reloading
)
2261 /* Some symbol formats have trouble providing file names... */
2262 if (name
== 0 || *name
== '\0')
2265 /* Look for a psymtab with the specified name. */
2268 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2270 if (STREQ (name
, ps
->filename
))
2272 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2273 goto again2
; /* Must restart, chain has been munged */
2277 /* Look for a symtab with the specified name. */
2279 for (s
= symtab_list
; s
; s
= s
->next
)
2281 if (STREQ (name
, s
->filename
))
2288 if (s
== symtab_list
)
2289 symtab_list
= s
->next
;
2291 prev
->next
= s
->next
;
2293 /* For now, queue a delete for all breakpoints, displays, etc., whether
2294 or not they depend on the symtab being freed. This should be
2295 changed so that only those data structures affected are deleted. */
2297 /* But don't delete anything if the symtab is empty.
2298 This test is necessary due to a bug in "dbxread.c" that
2299 causes empty symtabs to be created for N_SO symbols that
2300 contain the pathname of the object file. (This problem
2301 has been fixed in GDB 3.9x). */
2303 bv
= BLOCKVECTOR (s
);
2304 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2305 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2306 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2308 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2310 clear_symtab_users_queued
++;
2311 make_cleanup (clear_symtab_users_once
, 0);
2316 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2324 /* It is still possible that some breakpoints will be affected
2325 even though no symtab was found, since the file might have
2326 been compiled without debugging, and hence not be associated
2327 with a symtab. In order to handle this correctly, we would need
2328 to keep a list of text address ranges for undebuggable files.
2329 For now, we do nothing, since this is a fairly obscure case. */
2333 /* FIXME, what about the minimal symbol table? */
2340 /* Allocate and partially fill a partial symtab. It will be
2341 completely filled at the end of the symbol list.
2343 FILENAME is the name of the symbol-file we are reading from. */
2345 struct partial_symtab
*
2346 start_psymtab_common (struct objfile
*objfile
,
2347 struct section_offsets
*section_offsets
, char *filename
,
2348 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2349 struct partial_symbol
**static_syms
)
2351 struct partial_symtab
*psymtab
;
2353 psymtab
= allocate_psymtab (filename
, objfile
);
2354 psymtab
->section_offsets
= section_offsets
;
2355 psymtab
->textlow
= textlow
;
2356 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2357 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2358 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2362 /* Add a symbol with a long value to a psymtab.
2363 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2366 add_psymbol_to_list (char *name
, int namelength
, namespace_enum
namespace,
2367 enum address_class
class,
2368 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2369 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2370 enum language language
, struct objfile
*objfile
)
2372 register struct partial_symbol
*psym
;
2373 char *buf
= alloca (namelength
+ 1);
2374 /* psymbol is static so that there will be no uninitialized gaps in the
2375 structure which might contain random data, causing cache misses in
2377 static struct partial_symbol psymbol
;
2379 /* Create local copy of the partial symbol */
2380 memcpy (buf
, name
, namelength
);
2381 buf
[namelength
] = '\0';
2382 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, objfile
->psymbol_cache
);
2383 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2386 SYMBOL_VALUE (&psymbol
) = val
;
2390 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2392 SYMBOL_SECTION (&psymbol
) = 0;
2393 SYMBOL_LANGUAGE (&psymbol
) = language
;
2394 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2395 PSYMBOL_CLASS (&psymbol
) = class;
2396 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2398 /* Stash the partial symbol away in the cache */
2399 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2401 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2402 if (list
->next
>= list
->list
+ list
->size
)
2404 extend_psymbol_list (list
, objfile
);
2406 *list
->next
++ = psym
;
2407 OBJSTAT (objfile
, n_psyms
++);
2410 /* Add a symbol with a long value to a psymtab. This differs from
2411 * add_psymbol_to_list above in taking both a mangled and a demangled
2415 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2416 int dem_namelength
, namespace_enum
namespace,
2417 enum address_class
class,
2418 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2419 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2420 enum language language
,
2421 struct objfile
*objfile
)
2423 register struct partial_symbol
*psym
;
2424 char *buf
= alloca (namelength
+ 1);
2425 /* psymbol is static so that there will be no uninitialized gaps in the
2426 structure which might contain random data, causing cache misses in
2428 static struct partial_symbol psymbol
;
2430 /* Create local copy of the partial symbol */
2432 memcpy (buf
, name
, namelength
);
2433 buf
[namelength
] = '\0';
2434 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, objfile
->psymbol_cache
);
2436 buf
= alloca (dem_namelength
+ 1);
2437 memcpy (buf
, dem_name
, dem_namelength
);
2438 buf
[dem_namelength
] = '\0';
2443 case language_cplus
:
2444 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2445 bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2447 /* FIXME What should be done for the default case? Ignoring for now. */
2450 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2453 SYMBOL_VALUE (&psymbol
) = val
;
2457 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2459 SYMBOL_SECTION (&psymbol
) = 0;
2460 SYMBOL_LANGUAGE (&psymbol
) = language
;
2461 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2462 PSYMBOL_CLASS (&psymbol
) = class;
2463 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2465 /* Stash the partial symbol away in the cache */
2466 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2468 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2469 if (list
->next
>= list
->list
+ list
->size
)
2471 extend_psymbol_list (list
, objfile
);
2473 *list
->next
++ = psym
;
2474 OBJSTAT (objfile
, n_psyms
++);
2477 /* Initialize storage for partial symbols. */
2480 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2482 /* Free any previously allocated psymbol lists. */
2484 if (objfile
->global_psymbols
.list
)
2486 xmfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2488 if (objfile
->static_psymbols
.list
)
2490 xmfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2493 /* Current best guess is that approximately a twentieth
2494 of the total symbols (in a debugging file) are global or static
2497 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2498 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2500 if (objfile
->global_psymbols
.size
> 0)
2502 objfile
->global_psymbols
.next
=
2503 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2504 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2505 * sizeof (struct partial_symbol
*)));
2507 if (objfile
->static_psymbols
.size
> 0)
2509 objfile
->static_psymbols
.next
=
2510 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2511 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2512 * sizeof (struct partial_symbol
*)));
2517 The following code implements an abstraction for debugging overlay sections.
2519 The target model is as follows:
2520 1) The gnu linker will permit multiple sections to be mapped into the
2521 same VMA, each with its own unique LMA (or load address).
2522 2) It is assumed that some runtime mechanism exists for mapping the
2523 sections, one by one, from the load address into the VMA address.
2524 3) This code provides a mechanism for gdb to keep track of which
2525 sections should be considered to be mapped from the VMA to the LMA.
2526 This information is used for symbol lookup, and memory read/write.
2527 For instance, if a section has been mapped then its contents
2528 should be read from the VMA, otherwise from the LMA.
2530 Two levels of debugger support for overlays are available. One is
2531 "manual", in which the debugger relies on the user to tell it which
2532 overlays are currently mapped. This level of support is
2533 implemented entirely in the core debugger, and the information about
2534 whether a section is mapped is kept in the objfile->obj_section table.
2536 The second level of support is "automatic", and is only available if
2537 the target-specific code provides functionality to read the target's
2538 overlay mapping table, and translate its contents for the debugger
2539 (by updating the mapped state information in the obj_section tables).
2541 The interface is as follows:
2543 overlay map <name> -- tell gdb to consider this section mapped
2544 overlay unmap <name> -- tell gdb to consider this section unmapped
2545 overlay list -- list the sections that GDB thinks are mapped
2546 overlay read-target -- get the target's state of what's mapped
2547 overlay off/manual/auto -- set overlay debugging state
2548 Functional interface:
2549 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2550 section, return that section.
2551 find_pc_overlay(pc): find any overlay section that contains
2552 the pc, either in its VMA or its LMA
2553 overlay_is_mapped(sect): true if overlay is marked as mapped
2554 section_is_overlay(sect): true if section's VMA != LMA
2555 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2556 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2557 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2558 overlay_mapped_address(...): map an address from section's LMA to VMA
2559 overlay_unmapped_address(...): map an address from section's VMA to LMA
2560 symbol_overlayed_address(...): Return a "current" address for symbol:
2561 either in VMA or LMA depending on whether
2562 the symbol's section is currently mapped
2565 /* Overlay debugging state: */
2567 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2568 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2570 /* Target vector for refreshing overlay mapped state */
2571 static void simple_overlay_update (struct obj_section
*);
2572 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2574 /* Function: section_is_overlay (SECTION)
2575 Returns true if SECTION has VMA not equal to LMA, ie.
2576 SECTION is loaded at an address different from where it will "run". */
2579 section_is_overlay (asection
*section
)
2581 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2583 if (overlay_debugging
)
2584 if (section
&& section
->lma
!= 0 &&
2585 section
->vma
!= section
->lma
)
2591 /* Function: overlay_invalidate_all (void)
2592 Invalidate the mapped state of all overlay sections (mark it as stale). */
2595 overlay_invalidate_all (void)
2597 struct objfile
*objfile
;
2598 struct obj_section
*sect
;
2600 ALL_OBJSECTIONS (objfile
, sect
)
2601 if (section_is_overlay (sect
->the_bfd_section
))
2602 sect
->ovly_mapped
= -1;
2605 /* Function: overlay_is_mapped (SECTION)
2606 Returns true if section is an overlay, and is currently mapped.
2607 Private: public access is thru function section_is_mapped.
2609 Access to the ovly_mapped flag is restricted to this function, so
2610 that we can do automatic update. If the global flag
2611 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2612 overlay_invalidate_all. If the mapped state of the particular
2613 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2616 overlay_is_mapped (struct obj_section
*osect
)
2618 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2621 switch (overlay_debugging
)
2625 return 0; /* overlay debugging off */
2626 case ovly_auto
: /* overlay debugging automatic */
2627 /* Unles there is a target_overlay_update function,
2628 there's really nothing useful to do here (can't really go auto) */
2629 if (target_overlay_update
)
2631 if (overlay_cache_invalid
)
2633 overlay_invalidate_all ();
2634 overlay_cache_invalid
= 0;
2636 if (osect
->ovly_mapped
== -1)
2637 (*target_overlay_update
) (osect
);
2639 /* fall thru to manual case */
2640 case ovly_on
: /* overlay debugging manual */
2641 return osect
->ovly_mapped
== 1;
2645 /* Function: section_is_mapped
2646 Returns true if section is an overlay, and is currently mapped. */
2649 section_is_mapped (asection
*section
)
2651 struct objfile
*objfile
;
2652 struct obj_section
*osect
;
2654 if (overlay_debugging
)
2655 if (section
&& section_is_overlay (section
))
2656 ALL_OBJSECTIONS (objfile
, osect
)
2657 if (osect
->the_bfd_section
== section
)
2658 return overlay_is_mapped (osect
);
2663 /* Function: pc_in_unmapped_range
2664 If PC falls into the lma range of SECTION, return true, else false. */
2667 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2669 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2673 if (overlay_debugging
)
2674 if (section
&& section_is_overlay (section
))
2676 size
= bfd_get_section_size_before_reloc (section
);
2677 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2683 /* Function: pc_in_mapped_range
2684 If PC falls into the vma range of SECTION, return true, else false. */
2687 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2689 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2693 if (overlay_debugging
)
2694 if (section
&& section_is_overlay (section
))
2696 size
= bfd_get_section_size_before_reloc (section
);
2697 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2704 /* Return true if the mapped ranges of sections A and B overlap, false
2707 sections_overlap (asection
*a
, asection
*b
)
2709 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2711 CORE_ADDR a_start
= a
->vma
;
2712 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
2713 CORE_ADDR b_start
= b
->vma
;
2714 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
2716 return (a_start
< b_end
&& b_start
< a_end
);
2719 /* Function: overlay_unmapped_address (PC, SECTION)
2720 Returns the address corresponding to PC in the unmapped (load) range.
2721 May be the same as PC. */
2724 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
2726 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2728 if (overlay_debugging
)
2729 if (section
&& section_is_overlay (section
) &&
2730 pc_in_mapped_range (pc
, section
))
2731 return pc
+ section
->lma
- section
->vma
;
2736 /* Function: overlay_mapped_address (PC, SECTION)
2737 Returns the address corresponding to PC in the mapped (runtime) range.
2738 May be the same as PC. */
2741 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
2743 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2745 if (overlay_debugging
)
2746 if (section
&& section_is_overlay (section
) &&
2747 pc_in_unmapped_range (pc
, section
))
2748 return pc
+ section
->vma
- section
->lma
;
2754 /* Function: symbol_overlayed_address
2755 Return one of two addresses (relative to the VMA or to the LMA),
2756 depending on whether the section is mapped or not. */
2759 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
2761 if (overlay_debugging
)
2763 /* If the symbol has no section, just return its regular address. */
2766 /* If the symbol's section is not an overlay, just return its address */
2767 if (!section_is_overlay (section
))
2769 /* If the symbol's section is mapped, just return its address */
2770 if (section_is_mapped (section
))
2773 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2774 * then return its LOADED address rather than its vma address!!
2776 return overlay_unmapped_address (address
, section
);
2781 /* Function: find_pc_overlay (PC)
2782 Return the best-match overlay section for PC:
2783 If PC matches a mapped overlay section's VMA, return that section.
2784 Else if PC matches an unmapped section's VMA, return that section.
2785 Else if PC matches an unmapped section's LMA, return that section. */
2788 find_pc_overlay (CORE_ADDR pc
)
2790 struct objfile
*objfile
;
2791 struct obj_section
*osect
, *best_match
= NULL
;
2793 if (overlay_debugging
)
2794 ALL_OBJSECTIONS (objfile
, osect
)
2795 if (section_is_overlay (osect
->the_bfd_section
))
2797 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2799 if (overlay_is_mapped (osect
))
2800 return osect
->the_bfd_section
;
2804 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2807 return best_match
? best_match
->the_bfd_section
: NULL
;
2810 /* Function: find_pc_mapped_section (PC)
2811 If PC falls into the VMA address range of an overlay section that is
2812 currently marked as MAPPED, return that section. Else return NULL. */
2815 find_pc_mapped_section (CORE_ADDR pc
)
2817 struct objfile
*objfile
;
2818 struct obj_section
*osect
;
2820 if (overlay_debugging
)
2821 ALL_OBJSECTIONS (objfile
, osect
)
2822 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2823 overlay_is_mapped (osect
))
2824 return osect
->the_bfd_section
;
2829 /* Function: list_overlays_command
2830 Print a list of mapped sections and their PC ranges */
2833 list_overlays_command (char *args
, int from_tty
)
2836 struct objfile
*objfile
;
2837 struct obj_section
*osect
;
2839 if (overlay_debugging
)
2840 ALL_OBJSECTIONS (objfile
, osect
)
2841 if (overlay_is_mapped (osect
))
2847 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2848 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2849 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2850 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2852 printf_filtered ("Section %s, loaded at ", name
);
2853 print_address_numeric (lma
, 1, gdb_stdout
);
2854 puts_filtered (" - ");
2855 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2856 printf_filtered (", mapped at ");
2857 print_address_numeric (vma
, 1, gdb_stdout
);
2858 puts_filtered (" - ");
2859 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2860 puts_filtered ("\n");
2865 printf_filtered ("No sections are mapped.\n");
2868 /* Function: map_overlay_command
2869 Mark the named section as mapped (ie. residing at its VMA address). */
2872 map_overlay_command (char *args
, int from_tty
)
2874 struct objfile
*objfile
, *objfile2
;
2875 struct obj_section
*sec
, *sec2
;
2878 if (!overlay_debugging
)
2880 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2881 the 'overlay manual' command.");
2883 if (args
== 0 || *args
== 0)
2884 error ("Argument required: name of an overlay section");
2886 /* First, find a section matching the user supplied argument */
2887 ALL_OBJSECTIONS (objfile
, sec
)
2888 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2890 /* Now, check to see if the section is an overlay. */
2891 bfdsec
= sec
->the_bfd_section
;
2892 if (!section_is_overlay (bfdsec
))
2893 continue; /* not an overlay section */
2895 /* Mark the overlay as "mapped" */
2896 sec
->ovly_mapped
= 1;
2898 /* Next, make a pass and unmap any sections that are
2899 overlapped by this new section: */
2900 ALL_OBJSECTIONS (objfile2
, sec2
)
2901 if (sec2
->ovly_mapped
2903 && sec
->the_bfd_section
!= sec2
->the_bfd_section
2904 && sections_overlap (sec
->the_bfd_section
,
2905 sec2
->the_bfd_section
))
2908 printf_filtered ("Note: section %s unmapped by overlap\n",
2909 bfd_section_name (objfile
->obfd
,
2910 sec2
->the_bfd_section
));
2911 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2915 error ("No overlay section called %s", args
);
2918 /* Function: unmap_overlay_command
2919 Mark the overlay section as unmapped
2920 (ie. resident in its LMA address range, rather than the VMA range). */
2923 unmap_overlay_command (char *args
, int from_tty
)
2925 struct objfile
*objfile
;
2926 struct obj_section
*sec
;
2928 if (!overlay_debugging
)
2930 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2931 the 'overlay manual' command.");
2933 if (args
== 0 || *args
== 0)
2934 error ("Argument required: name of an overlay section");
2936 /* First, find a section matching the user supplied argument */
2937 ALL_OBJSECTIONS (objfile
, sec
)
2938 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2940 if (!sec
->ovly_mapped
)
2941 error ("Section %s is not mapped", args
);
2942 sec
->ovly_mapped
= 0;
2945 error ("No overlay section called %s", args
);
2948 /* Function: overlay_auto_command
2949 A utility command to turn on overlay debugging.
2950 Possibly this should be done via a set/show command. */
2953 overlay_auto_command (char *args
, int from_tty
)
2955 overlay_debugging
= ovly_auto
;
2956 enable_overlay_breakpoints ();
2958 printf_filtered ("Automatic overlay debugging enabled.");
2961 /* Function: overlay_manual_command
2962 A utility command to turn on overlay debugging.
2963 Possibly this should be done via a set/show command. */
2966 overlay_manual_command (char *args
, int from_tty
)
2968 overlay_debugging
= ovly_on
;
2969 disable_overlay_breakpoints ();
2971 printf_filtered ("Overlay debugging enabled.");
2974 /* Function: overlay_off_command
2975 A utility command to turn on overlay debugging.
2976 Possibly this should be done via a set/show command. */
2979 overlay_off_command (char *args
, int from_tty
)
2981 overlay_debugging
= ovly_off
;
2982 disable_overlay_breakpoints ();
2984 printf_filtered ("Overlay debugging disabled.");
2988 overlay_load_command (char *args
, int from_tty
)
2990 if (target_overlay_update
)
2991 (*target_overlay_update
) (NULL
);
2993 error ("This target does not know how to read its overlay state.");
2996 /* Function: overlay_command
2997 A place-holder for a mis-typed command */
2999 /* Command list chain containing all defined "overlay" subcommands. */
3000 struct cmd_list_element
*overlaylist
;
3003 overlay_command (char *args
, int from_tty
)
3006 ("\"overlay\" must be followed by the name of an overlay command.\n");
3007 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3011 /* Target Overlays for the "Simplest" overlay manager:
3013 This is GDB's default target overlay layer. It works with the
3014 minimal overlay manager supplied as an example by Cygnus. The
3015 entry point is via a function pointer "target_overlay_update",
3016 so targets that use a different runtime overlay manager can
3017 substitute their own overlay_update function and take over the
3020 The overlay_update function pokes around in the target's data structures
3021 to see what overlays are mapped, and updates GDB's overlay mapping with
3024 In this simple implementation, the target data structures are as follows:
3025 unsigned _novlys; /# number of overlay sections #/
3026 unsigned _ovly_table[_novlys][4] = {
3027 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3028 {..., ..., ..., ...},
3030 unsigned _novly_regions; /# number of overlay regions #/
3031 unsigned _ovly_region_table[_novly_regions][3] = {
3032 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3035 These functions will attempt to update GDB's mappedness state in the
3036 symbol section table, based on the target's mappedness state.
3038 To do this, we keep a cached copy of the target's _ovly_table, and
3039 attempt to detect when the cached copy is invalidated. The main
3040 entry point is "simple_overlay_update(SECT), which looks up SECT in
3041 the cached table and re-reads only the entry for that section from
3042 the target (whenever possible).
3045 /* Cached, dynamically allocated copies of the target data structures: */
3046 static unsigned (*cache_ovly_table
)[4] = 0;
3048 static unsigned (*cache_ovly_region_table
)[3] = 0;
3050 static unsigned cache_novlys
= 0;
3052 static unsigned cache_novly_regions
= 0;
3054 static CORE_ADDR cache_ovly_table_base
= 0;
3056 static CORE_ADDR cache_ovly_region_table_base
= 0;
3060 VMA
, SIZE
, LMA
, MAPPED
3062 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3064 /* Throw away the cached copy of _ovly_table */
3066 simple_free_overlay_table (void)
3068 if (cache_ovly_table
)
3069 xfree (cache_ovly_table
);
3071 cache_ovly_table
= NULL
;
3072 cache_ovly_table_base
= 0;
3076 /* Throw away the cached copy of _ovly_region_table */
3078 simple_free_overlay_region_table (void)
3080 if (cache_ovly_region_table
)
3081 xfree (cache_ovly_region_table
);
3082 cache_novly_regions
= 0;
3083 cache_ovly_region_table
= NULL
;
3084 cache_ovly_region_table_base
= 0;
3088 /* Read an array of ints from the target into a local buffer.
3089 Convert to host order. int LEN is number of ints */
3091 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3093 /* FIXME (alloca): Not safe if array is very large. */
3094 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3097 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3098 for (i
= 0; i
< len
; i
++)
3099 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3103 /* Find and grab a copy of the target _ovly_table
3104 (and _novlys, which is needed for the table's size) */
3106 simple_read_overlay_table (void)
3108 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3110 simple_free_overlay_table ();
3111 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3114 error ("Error reading inferior's overlay table: "
3115 "couldn't find `_novlys' variable\n"
3116 "in inferior. Use `overlay manual' mode.");
3120 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3121 if (! ovly_table_msym
)
3123 error ("Error reading inferior's overlay table: couldn't find "
3124 "`_ovly_table' array\n"
3125 "in inferior. Use `overlay manual' mode.");
3129 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3131 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3132 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3133 read_target_long_array (cache_ovly_table_base
,
3134 (int *) cache_ovly_table
,
3137 return 1; /* SUCCESS */
3141 /* Find and grab a copy of the target _ovly_region_table
3142 (and _novly_regions, which is needed for the table's size) */
3144 simple_read_overlay_region_table (void)
3146 struct minimal_symbol
*msym
;
3148 simple_free_overlay_region_table ();
3149 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3151 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3153 return 0; /* failure */
3154 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3155 if (cache_ovly_region_table
!= NULL
)
3157 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3160 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3161 read_target_long_array (cache_ovly_region_table_base
,
3162 (int *) cache_ovly_region_table
,
3163 cache_novly_regions
* 3);
3166 return 0; /* failure */
3169 return 0; /* failure */
3170 return 1; /* SUCCESS */
3174 /* Function: simple_overlay_update_1
3175 A helper function for simple_overlay_update. Assuming a cached copy
3176 of _ovly_table exists, look through it to find an entry whose vma,
3177 lma and size match those of OSECT. Re-read the entry and make sure
3178 it still matches OSECT (else the table may no longer be valid).
3179 Set OSECT's mapped state to match the entry. Return: 1 for
3180 success, 0 for failure. */
3183 simple_overlay_update_1 (struct obj_section
*osect
)
3186 bfd
*obfd
= osect
->objfile
->obfd
;
3187 asection
*bsect
= osect
->the_bfd_section
;
3189 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3190 for (i
= 0; i
< cache_novlys
; i
++)
3191 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3192 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3193 /* && cache_ovly_table[i][SIZE] == size */ )
3195 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3196 (int *) cache_ovly_table
[i
], 4);
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 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3204 else /* Warning! Warning! Target's ovly table has changed! */
3210 /* Function: simple_overlay_update
3211 If OSECT is NULL, then update all sections' mapped state
3212 (after re-reading the entire target _ovly_table).
3213 If OSECT is non-NULL, then try to find a matching entry in the
3214 cached ovly_table and update only OSECT's mapped state.
3215 If a cached entry can't be found or the cache isn't valid, then
3216 re-read the entire cache, and go ahead and update all sections. */
3219 simple_overlay_update (struct obj_section
*osect
)
3221 struct objfile
*objfile
;
3223 /* Were we given an osect to look up? NULL means do all of them. */
3225 /* Have we got a cached copy of the target's overlay table? */
3226 if (cache_ovly_table
!= NULL
)
3227 /* Does its cached location match what's currently in the symtab? */
3228 if (cache_ovly_table_base
==
3229 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3230 /* Then go ahead and try to look up this single section in the cache */
3231 if (simple_overlay_update_1 (osect
))
3232 /* Found it! We're done. */
3235 /* Cached table no good: need to read the entire table anew.
3236 Or else we want all the sections, in which case it's actually
3237 more efficient to read the whole table in one block anyway. */
3239 if (! simple_read_overlay_table ())
3242 /* Now may as well update all sections, even if only one was requested. */
3243 ALL_OBJSECTIONS (objfile
, osect
)
3244 if (section_is_overlay (osect
->the_bfd_section
))
3247 bfd
*obfd
= osect
->objfile
->obfd
;
3248 asection
*bsect
= osect
->the_bfd_section
;
3250 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3251 for (i
= 0; i
< cache_novlys
; i
++)
3252 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3253 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3254 /* && cache_ovly_table[i][SIZE] == size */ )
3255 { /* obj_section matches i'th entry in ovly_table */
3256 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3257 break; /* finished with inner for loop: break out */
3264 _initialize_symfile (void)
3266 struct cmd_list_element
*c
;
3268 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3269 "Load symbol table from executable file FILE.\n\
3270 The `file' command can also load symbol tables, as well as setting the file\n\
3271 to execute.", &cmdlist
);
3272 set_cmd_completer (c
, filename_completer
);
3274 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3275 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3276 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3277 ADDR is the starting address of the file's text.\n\
3278 The optional arguments are section-name section-address pairs and\n\
3279 should be specified if the data and bss segments are not contiguous\n\
3280 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3282 set_cmd_completer (c
, filename_completer
);
3284 c
= add_cmd ("add-shared-symbol-files", class_files
,
3285 add_shared_symbol_files_command
,
3286 "Load the symbols from shared objects in the dynamic linker's link map.",
3288 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3291 c
= add_cmd ("load", class_files
, load_command
,
3292 "Dynamically load FILE into the running program, and record its symbols\n\
3293 for access from GDB.", &cmdlist
);
3294 set_cmd_completer (c
, filename_completer
);
3297 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3298 (char *) &symbol_reloading
,
3299 "Set dynamic symbol table reloading multiple times in one run.",
3303 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3304 "Commands for debugging overlays.", &overlaylist
,
3305 "overlay ", 0, &cmdlist
);
3307 add_com_alias ("ovly", "overlay", class_alias
, 1);
3308 add_com_alias ("ov", "overlay", class_alias
, 1);
3310 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3311 "Assert that an overlay section is mapped.", &overlaylist
);
3313 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3314 "Assert that an overlay section is unmapped.", &overlaylist
);
3316 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3317 "List mappings of overlay sections.", &overlaylist
);
3319 add_cmd ("manual", class_support
, overlay_manual_command
,
3320 "Enable overlay debugging.", &overlaylist
);
3321 add_cmd ("off", class_support
, overlay_off_command
,
3322 "Disable overlay debugging.", &overlaylist
);
3323 add_cmd ("auto", class_support
, overlay_auto_command
,
3324 "Enable automatic overlay debugging.", &overlaylist
);
3325 add_cmd ("load-target", class_support
, overlay_load_command
,
3326 "Read the overlay mapping state from the target.", &overlaylist
);
3328 /* Filename extension to source language lookup table: */
3329 init_filename_language_table ();
3330 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3332 "Set mapping between filename extension and source language.\n\
3333 Usage: set extension-language .foo bar",
3335 set_cmd_cfunc (c
, set_ext_lang_command
);
3337 add_info ("extensions", info_ext_lang_command
,
3338 "All filename extensions associated with a source language.");
3341 (add_set_cmd ("download-write-size", class_obscure
,
3342 var_integer
, (char *) &download_write_size
,
3343 "Set the write size used when downloading a program.\n"
3344 "Only used when downloading a program onto a remote\n"
3345 "target. Specify zero, or a negative value, to disable\n"
3346 "blocked writes. The actual size of each transfer is also\n"
3347 "limited by the size of the target packet and the memory\n"