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, 2003 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. */
37 #include "breakpoint.h"
39 #include "complaints.h"
41 #include "inferior.h" /* for write_pc */
42 #include "filenames.h" /* for DOSish file names */
43 #include "gdb-stabs.h"
44 #include "gdb_obstack.h"
45 #include "completer.h"
48 #include <readline/readline.h>
49 #include "gdb_assert.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
65 /* Some HP-UX related globals to clear when a new "main"
66 symbol file is loaded. HP-specific. */
68 extern int hp_som_som_object_present
;
69 extern int hp_cxx_exception_support_initialized
;
70 #define RESET_HP_UX_GLOBALS() do {\
71 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
72 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
76 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
77 void (*show_load_progress
) (const char *section
,
78 unsigned long section_sent
,
79 unsigned long section_size
,
80 unsigned long total_sent
,
81 unsigned long total_size
);
82 void (*pre_add_symbol_hook
) (char *);
83 void (*post_add_symbol_hook
) (void);
84 void (*target_new_objfile_hook
) (struct objfile
*);
86 static void clear_symtab_users_cleanup (void *ignore
);
88 /* Global variables owned by this file */
89 int readnow_symbol_files
; /* Read full symbols immediately */
91 /* External variables and functions referenced. */
93 extern void report_transfer_performance (unsigned long, time_t, time_t);
95 /* Functions this file defines */
98 static int simple_read_overlay_region_table (void);
99 static void simple_free_overlay_region_table (void);
102 static void set_initial_language (void);
104 static void load_command (char *, int);
106 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
108 static void add_symbol_file_command (char *, int);
110 static void add_shared_symbol_files_command (char *, int);
112 static void reread_separate_symbols (struct objfile
*objfile
);
114 static void cashier_psymtab (struct partial_symtab
*);
116 bfd
*symfile_bfd_open (char *);
118 int get_section_index (struct objfile
*, char *);
120 static void find_sym_fns (struct objfile
*);
122 static void decrement_reading_symtab (void *);
124 static void overlay_invalidate_all (void);
126 static int overlay_is_mapped (struct obj_section
*);
128 void list_overlays_command (char *, int);
130 void map_overlay_command (char *, int);
132 void unmap_overlay_command (char *, int);
134 static void overlay_auto_command (char *, int);
136 static void overlay_manual_command (char *, int);
138 static void overlay_off_command (char *, int);
140 static void overlay_load_command (char *, int);
142 static void overlay_command (char *, int);
144 static void simple_free_overlay_table (void);
146 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
148 static int simple_read_overlay_table (void);
150 static int simple_overlay_update_1 (struct obj_section
*);
152 static void add_filename_language (char *ext
, enum language lang
);
154 static void set_ext_lang_command (char *args
, int from_tty
);
156 static void info_ext_lang_command (char *args
, int from_tty
);
158 static char *find_separate_debug_file (struct objfile
*objfile
);
160 static void init_filename_language_table (void);
162 void _initialize_symfile (void);
164 /* List of all available sym_fns. On gdb startup, each object file reader
165 calls add_symtab_fns() to register information on each format it is
168 static struct sym_fns
*symtab_fns
= NULL
;
170 /* Flag for whether user will be reloading symbols multiple times.
171 Defaults to ON for VxWorks, otherwise OFF. */
173 #ifdef SYMBOL_RELOADING_DEFAULT
174 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
176 int symbol_reloading
= 0;
179 /* If non-zero, shared library symbols will be added automatically
180 when the inferior is created, new libraries are loaded, or when
181 attaching to the inferior. This is almost always what users will
182 want to have happen; but for very large programs, the startup time
183 will be excessive, and so if this is a problem, the user can clear
184 this flag and then add the shared library symbols as needed. Note
185 that there is a potential for confusion, since if the shared
186 library symbols are not loaded, commands like "info fun" will *not*
187 report all the functions that are actually present. */
189 int auto_solib_add
= 1;
191 /* For systems that support it, a threshold size in megabytes. If
192 automatically adding a new library's symbol table to those already
193 known to the debugger would cause the total shared library symbol
194 size to exceed this threshhold, then the shlib's symbols are not
195 added. The threshold is ignored if the user explicitly asks for a
196 shlib to be added, such as when using the "sharedlibrary"
199 int auto_solib_limit
;
202 /* Since this function is called from within qsort, in an ANSI environment
203 it must conform to the prototype for qsort, which specifies that the
204 comparison function takes two "void *" pointers. */
207 compare_symbols (const void *s1p
, const void *s2p
)
209 register struct symbol
**s1
, **s2
;
211 s1
= (struct symbol
**) s1p
;
212 s2
= (struct symbol
**) s2p
;
213 return (strcmp (SYMBOL_NATURAL_NAME (*s1
), SYMBOL_NATURAL_NAME (*s2
)));
216 /* This compares two partial symbols by names, using strcmp_iw_ordered
217 for the comparison. */
220 compare_psymbols (const void *s1p
, const void *s2p
)
222 struct partial_symbol
*const *s1
= s1p
;
223 struct partial_symbol
*const *s2
= s2p
;
225 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1
),
226 SYMBOL_NATURAL_NAME (*s2
));
230 sort_pst_symbols (struct partial_symtab
*pst
)
232 /* Sort the global list; don't sort the static list */
234 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
235 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
239 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
242 sort_block_syms (register struct block
*b
)
244 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
245 sizeof (struct symbol
*), compare_symbols
);
248 /* Call sort_symtab_syms to sort alphabetically
249 the symbols of each block of one symtab. */
252 sort_symtab_syms (register struct symtab
*s
)
254 register struct blockvector
*bv
;
257 register struct block
*b
;
261 bv
= BLOCKVECTOR (s
);
262 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
263 for (i
= 0; i
< nbl
; i
++)
265 b
= BLOCKVECTOR_BLOCK (bv
, i
);
266 if (BLOCK_SHOULD_SORT (b
))
271 /* Make a null terminated copy of the string at PTR with SIZE characters in
272 the obstack pointed to by OBSTACKP . Returns the address of the copy.
273 Note that the string at PTR does not have to be null terminated, I.E. it
274 may be part of a larger string and we are only saving a substring. */
277 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
279 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
280 /* Open-coded memcpy--saves function call time. These strings are usually
281 short. FIXME: Is this really still true with a compiler that can
284 register const char *p1
= ptr
;
285 register char *p2
= p
;
286 const char *end
= ptr
+ size
;
294 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
295 in the obstack pointed to by OBSTACKP. */
298 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
301 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
302 register char *val
= (char *) obstack_alloc (obstackp
, len
);
309 /* True if we are nested inside psymtab_to_symtab. */
311 int currently_reading_symtab
= 0;
314 decrement_reading_symtab (void *dummy
)
316 currently_reading_symtab
--;
319 /* Get the symbol table that corresponds to a partial_symtab.
320 This is fast after the first time you do it. In fact, there
321 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
325 psymtab_to_symtab (register struct partial_symtab
*pst
)
327 /* If it's been looked up before, return it. */
331 /* If it has not yet been read in, read it. */
334 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
335 currently_reading_symtab
++;
336 (*pst
->read_symtab
) (pst
);
337 do_cleanups (back_to
);
343 /* Initialize entry point information for this objfile. */
346 init_entry_point_info (struct objfile
*objfile
)
348 /* Save startup file's range of PC addresses to help blockframe.c
349 decide where the bottom of the stack is. */
351 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
353 /* Executable file -- record its entry point so we'll recognize
354 the startup file because it contains the entry point. */
355 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
359 /* Examination of non-executable.o files. Short-circuit this stuff. */
360 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
362 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
363 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
364 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
365 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
366 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
367 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
370 /* Get current entry point address. */
373 entry_point_address (void)
375 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
378 /* Remember the lowest-addressed loadable section we've seen.
379 This function is called via bfd_map_over_sections.
381 In case of equal vmas, the section with the largest size becomes the
382 lowest-addressed loadable section.
384 If the vmas and sizes are equal, the last section is considered the
385 lowest-addressed loadable section. */
388 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
390 asection
**lowest
= (asection
**) obj
;
392 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
395 *lowest
= sect
; /* First loadable section */
396 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
397 *lowest
= sect
; /* A lower loadable section */
398 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
399 && (bfd_section_size (abfd
, (*lowest
))
400 <= bfd_section_size (abfd
, sect
)))
404 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
406 struct section_addr_info
*
407 alloc_section_addr_info (size_t num_sections
)
409 struct section_addr_info
*sap
;
412 size
= (sizeof (struct section_addr_info
)
413 + sizeof (struct other_sections
) * (num_sections
- 1));
414 sap
= (struct section_addr_info
*) xmalloc (size
);
415 memset (sap
, 0, size
);
416 sap
->num_sections
= num_sections
;
421 /* Build (allocate and populate) a section_addr_info struct from
422 an existing section table. */
424 extern struct section_addr_info
*
425 build_section_addr_info_from_section_table (const struct section_table
*start
,
426 const struct section_table
*end
)
428 struct section_addr_info
*sap
;
429 const struct section_table
*stp
;
432 sap
= alloc_section_addr_info (end
- start
);
434 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
436 if (bfd_get_section_flags (stp
->bfd
,
437 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
438 && oidx
< end
- start
)
440 sap
->other
[oidx
].addr
= stp
->addr
;
441 sap
->other
[oidx
].name
442 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
443 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
452 /* Free all memory allocated by build_section_addr_info_from_section_table. */
455 free_section_addr_info (struct section_addr_info
*sap
)
459 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
460 if (sap
->other
[idx
].name
)
461 xfree (sap
->other
[idx
].name
);
466 /* Initialize OBJFILE's sect_index_* members. */
468 init_objfile_sect_indices (struct objfile
*objfile
)
473 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
475 objfile
->sect_index_text
= sect
->index
;
477 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
479 objfile
->sect_index_data
= sect
->index
;
481 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
483 objfile
->sect_index_bss
= sect
->index
;
485 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
487 objfile
->sect_index_rodata
= sect
->index
;
489 /* This is where things get really weird... We MUST have valid
490 indices for the various sect_index_* members or gdb will abort.
491 So if for example, there is no ".text" section, we have to
492 accomodate that. Except when explicitly adding symbol files at
493 some address, section_offsets contains nothing but zeros, so it
494 doesn't matter which slot in section_offsets the individual
495 sect_index_* members index into. So if they are all zero, it is
496 safe to just point all the currently uninitialized indices to the
499 for (i
= 0; i
< objfile
->num_sections
; i
++)
501 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
506 if (i
== objfile
->num_sections
)
508 if (objfile
->sect_index_text
== -1)
509 objfile
->sect_index_text
= 0;
510 if (objfile
->sect_index_data
== -1)
511 objfile
->sect_index_data
= 0;
512 if (objfile
->sect_index_bss
== -1)
513 objfile
->sect_index_bss
= 0;
514 if (objfile
->sect_index_rodata
== -1)
515 objfile
->sect_index_rodata
= 0;
520 /* Parse the user's idea of an offset for dynamic linking, into our idea
521 of how to represent it for fast symbol reading. This is the default
522 version of the sym_fns.sym_offsets function for symbol readers that
523 don't need to do anything special. It allocates a section_offsets table
524 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
527 default_symfile_offsets (struct objfile
*objfile
,
528 struct section_addr_info
*addrs
)
532 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
533 objfile
->section_offsets
= (struct section_offsets
*)
534 obstack_alloc (&objfile
->psymbol_obstack
,
535 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
536 memset (objfile
->section_offsets
, 0,
537 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
539 /* Now calculate offsets for section that were specified by the
541 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
543 struct other_sections
*osp
;
545 osp
= &addrs
->other
[i
] ;
549 /* Record all sections in offsets */
550 /* The section_offsets in the objfile are here filled in using
552 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
555 /* Remember the bfd indexes for the .text, .data, .bss and
557 init_objfile_sect_indices (objfile
);
561 /* Process a symbol file, as either the main file or as a dynamically
564 OBJFILE is where the symbols are to be read from.
566 ADDRS is the list of section load addresses. If the user has given
567 an 'add-symbol-file' command, then this is the list of offsets and
568 addresses he or she provided as arguments to the command; or, if
569 we're handling a shared library, these are the actual addresses the
570 sections are loaded at, according to the inferior's dynamic linker
571 (as gleaned by GDB's shared library code). We convert each address
572 into an offset from the section VMA's as it appears in the object
573 file, and then call the file's sym_offsets function to convert this
574 into a format-specific offset table --- a `struct section_offsets'.
575 If ADDRS is non-zero, OFFSETS must be zero.
577 OFFSETS is a table of section offsets already in the right
578 format-specific representation. NUM_OFFSETS is the number of
579 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
580 assume this is the proper table the call to sym_offsets described
581 above would produce. Instead of calling sym_offsets, we just dump
582 it right into objfile->section_offsets. (When we're re-reading
583 symbols from an objfile, we don't have the original load address
584 list any more; all we have is the section offset table.) If
585 OFFSETS is non-zero, ADDRS must be zero.
587 MAINLINE is nonzero if this is the main symbol file, or zero if
588 it's an extra symbol file such as dynamically loaded code.
590 VERBO is nonzero if the caller has printed a verbose message about
591 the symbol reading (and complaints can be more terse about it). */
594 syms_from_objfile (struct objfile
*objfile
,
595 struct section_addr_info
*addrs
,
596 struct section_offsets
*offsets
,
601 asection
*lower_sect
;
603 CORE_ADDR lower_offset
;
604 struct section_addr_info
*local_addr
= NULL
;
605 struct cleanup
*old_chain
;
608 gdb_assert (! (addrs
&& offsets
));
610 init_entry_point_info (objfile
);
611 find_sym_fns (objfile
);
613 if (objfile
->sf
== NULL
)
614 return; /* No symbols. */
616 /* Make sure that partially constructed symbol tables will be cleaned up
617 if an error occurs during symbol reading. */
618 old_chain
= make_cleanup_free_objfile (objfile
);
620 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
621 list. We now establish the convention that an addr of zero means
622 no load address was specified. */
623 if (! addrs
&& ! offsets
)
626 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
627 make_cleanup (xfree
, local_addr
);
631 /* Now either addrs or offsets is non-zero. */
635 /* We will modify the main symbol table, make sure that all its users
636 will be cleaned up if an error occurs during symbol reading. */
637 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
639 /* Since no error yet, throw away the old symbol table. */
641 if (symfile_objfile
!= NULL
)
643 free_objfile (symfile_objfile
);
644 symfile_objfile
= NULL
;
647 /* Currently we keep symbols from the add-symbol-file command.
648 If the user wants to get rid of them, they should do "symbol-file"
649 without arguments first. Not sure this is the best behavior
652 (*objfile
->sf
->sym_new_init
) (objfile
);
655 /* Convert addr into an offset rather than an absolute address.
656 We find the lowest address of a loaded segment in the objfile,
657 and assume that <addr> is where that got loaded.
659 We no longer warn if the lowest section is not a text segment (as
660 happens for the PA64 port. */
663 /* Find lowest loadable section to be used as starting point for
664 continguous sections. FIXME!! won't work without call to find
665 .text first, but this assumes text is lowest section. */
666 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
667 if (lower_sect
== NULL
)
668 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
670 if (lower_sect
== NULL
)
671 warning ("no loadable sections found in added symbol-file %s",
674 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
675 warning ("Lowest section in %s is %s at %s",
677 bfd_section_name (objfile
->obfd
, lower_sect
),
678 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
679 if (lower_sect
!= NULL
)
680 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
684 /* Calculate offsets for the loadable sections.
685 FIXME! Sections must be in order of increasing loadable section
686 so that contiguous sections can use the lower-offset!!!
688 Adjust offsets if the segments are not contiguous.
689 If the section is contiguous, its offset should be set to
690 the offset of the highest loadable section lower than it
691 (the loadable section directly below it in memory).
692 this_offset = lower_offset = lower_addr - lower_orig_addr */
694 /* Calculate offsets for sections. */
696 for (i
=0 ; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
698 if (addrs
->other
[i
].addr
!= 0)
700 sect
= bfd_get_section_by_name (objfile
->obfd
,
701 addrs
->other
[i
].name
);
705 -= bfd_section_vma (objfile
->obfd
, sect
);
706 lower_offset
= addrs
->other
[i
].addr
;
707 /* This is the index used by BFD. */
708 addrs
->other
[i
].sectindex
= sect
->index
;
712 warning ("section %s not found in %s",
713 addrs
->other
[i
].name
,
715 addrs
->other
[i
].addr
= 0;
719 addrs
->other
[i
].addr
= lower_offset
;
723 /* Initialize symbol reading routines for this objfile, allow complaints to
724 appear for this new file, and record how verbose to be, then do the
725 initial symbol reading for this file. */
727 (*objfile
->sf
->sym_init
) (objfile
);
728 clear_complaints (&symfile_complaints
, 1, verbo
);
731 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
734 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
736 /* Just copy in the offset table directly as given to us. */
737 objfile
->num_sections
= num_offsets
;
738 objfile
->section_offsets
739 = ((struct section_offsets
*)
740 obstack_alloc (&objfile
->psymbol_obstack
, size
));
741 memcpy (objfile
->section_offsets
, offsets
, size
);
743 init_objfile_sect_indices (objfile
);
746 #ifndef IBM6000_TARGET
747 /* This is a SVR4/SunOS specific hack, I think. In any event, it
748 screws RS/6000. sym_offsets should be doing this sort of thing,
749 because it knows the mapping between bfd sections and
751 /* This is a hack. As far as I can tell, section offsets are not
752 target dependent. They are all set to addr with a couple of
753 exceptions. The exceptions are sysvr4 shared libraries, whose
754 offsets are kept in solib structures anyway and rs6000 xcoff
755 which handles shared libraries in a completely unique way.
757 Section offsets are built similarly, except that they are built
758 by adding addr in all cases because there is no clear mapping
759 from section_offsets into actual sections. Note that solib.c
760 has a different algorithm for finding section offsets.
762 These should probably all be collapsed into some target
763 independent form of shared library support. FIXME. */
767 struct obj_section
*s
;
769 /* Map section offsets in "addr" back to the object's
770 sections by comparing the section names with bfd's
771 section names. Then adjust the section address by
772 the offset. */ /* for gdb/13815 */
774 ALL_OBJFILE_OSECTIONS (objfile
, s
)
776 CORE_ADDR s_addr
= 0;
780 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
782 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
784 addrs
->other
[i
].name
) == 0)
785 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
787 s
->addr
-= s
->offset
;
789 s
->endaddr
-= s
->offset
;
790 s
->endaddr
+= s_addr
;
794 #endif /* not IBM6000_TARGET */
796 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
798 /* Don't allow char * to have a typename (else would get caddr_t).
799 Ditto void *. FIXME: Check whether this is now done by all the
800 symbol readers themselves (many of them now do), and if so remove
803 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
804 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
806 /* Mark the objfile has having had initial symbol read attempted. Note
807 that this does not mean we found any symbols... */
809 objfile
->flags
|= OBJF_SYMS
;
811 /* Discard cleanups as symbol reading was successful. */
813 discard_cleanups (old_chain
);
816 /* Perform required actions after either reading in the initial
817 symbols for a new objfile, or mapping in the symbols from a reusable
821 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
824 /* If this is the main symbol file we have to clean up all users of the
825 old main symbol file. Otherwise it is sufficient to fixup all the
826 breakpoints that may have been redefined by this symbol file. */
829 /* OK, make it the "real" symbol file. */
830 symfile_objfile
= objfile
;
832 clear_symtab_users ();
836 breakpoint_re_set ();
839 /* We're done reading the symbol file; finish off complaints. */
840 clear_complaints (&symfile_complaints
, 0, verbo
);
843 /* Process a symbol file, as either the main file or as a dynamically
846 NAME is the file name (which will be tilde-expanded and made
847 absolute herein) (but we don't free or modify NAME itself).
849 FROM_TTY says how verbose to be.
851 MAINLINE specifies whether this is the main symbol file, or whether
852 it's an extra symbol file such as dynamically loaded code.
854 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
855 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
858 Upon success, returns a pointer to the objfile that was added.
859 Upon failure, jumps back to command level (never returns). */
860 static struct objfile
*
861 symbol_file_add_with_addrs_or_offsets (char *name
, int from_tty
,
862 struct section_addr_info
*addrs
,
863 struct section_offsets
*offsets
,
865 int mainline
, int flags
)
867 struct objfile
*objfile
;
868 struct partial_symtab
*psymtab
;
871 struct section_addr_info
*orig_addrs
;
872 struct cleanup
*my_cleanups
;
874 /* Open a bfd for the file, and give user a chance to burp if we'd be
875 interactively wiping out any existing symbols. */
877 abfd
= symfile_bfd_open (name
);
879 if ((have_full_symbols () || have_partial_symbols ())
882 && !query ("Load new symbol table from \"%s\"? ", name
))
883 error ("Not confirmed.");
885 objfile
= allocate_objfile (abfd
, flags
);
887 orig_addrs
= alloc_section_addr_info (bfd_count_sections (abfd
));
888 my_cleanups
= make_cleanup (xfree
, orig_addrs
);
890 *orig_addrs
= *addrs
;
892 /* If the objfile uses a mapped symbol file, and we have a psymtab for
893 it, then skip reading any symbols at this time. */
895 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
897 /* We mapped in an existing symbol table file that already has had
898 initial symbol reading performed, so we can skip that part. Notify
899 the user that instead of reading the symbols, they have been mapped.
901 if (from_tty
|| info_verbose
)
903 printf_filtered ("Mapped symbols for %s...", name
);
905 gdb_flush (gdb_stdout
);
907 init_entry_point_info (objfile
);
908 find_sym_fns (objfile
);
912 /* We either created a new mapped symbol table, mapped an existing
913 symbol table file which has not had initial symbol reading
914 performed, or need to read an unmapped symbol table. */
915 if (from_tty
|| info_verbose
)
917 if (pre_add_symbol_hook
)
918 pre_add_symbol_hook (name
);
921 printf_filtered ("Reading symbols from %s...", name
);
923 gdb_flush (gdb_stdout
);
926 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
930 /* We now have at least a partial symbol table. Check to see if the
931 user requested that all symbols be read on initial access via either
932 the gdb startup command line or on a per symbol file basis. Expand
933 all partial symbol tables for this objfile if so. */
935 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
937 if (from_tty
|| info_verbose
)
939 printf_filtered ("expanding to full symbols...");
941 gdb_flush (gdb_stdout
);
944 for (psymtab
= objfile
->psymtabs
;
946 psymtab
= psymtab
->next
)
948 psymtab_to_symtab (psymtab
);
952 debugfile
= find_separate_debug_file (objfile
);
957 objfile
->separate_debug_objfile
958 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
962 objfile
->separate_debug_objfile
963 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
965 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
968 /* Put the separate debug object before the normal one, this is so that
969 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
970 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
975 if (!have_partial_symbols () && !have_full_symbols ())
978 printf_filtered ("(no debugging symbols found)...");
982 if (from_tty
|| info_verbose
)
984 if (post_add_symbol_hook
)
985 post_add_symbol_hook ();
988 printf_filtered ("done.\n");
992 /* We print some messages regardless of whether 'from_tty ||
993 info_verbose' is true, so make sure they go out at the right
995 gdb_flush (gdb_stdout
);
997 do_cleanups (my_cleanups
);
999 if (objfile
->sf
== NULL
)
1000 return objfile
; /* No symbols. */
1002 new_symfile_objfile (objfile
, mainline
, from_tty
);
1004 if (target_new_objfile_hook
)
1005 target_new_objfile_hook (objfile
);
1011 /* Process a symbol file, as either the main file or as a dynamically
1012 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1015 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
1016 int mainline
, int flags
)
1018 return symbol_file_add_with_addrs_or_offsets (name
, from_tty
, addrs
, 0, 0,
1023 /* Call symbol_file_add() with default values and update whatever is
1024 affected by the loading of a new main().
1025 Used when the file is supplied in the gdb command line
1026 and by some targets with special loading requirements.
1027 The auxiliary function, symbol_file_add_main_1(), has the flags
1028 argument for the switches that can only be specified in the symbol_file
1032 symbol_file_add_main (char *args
, int from_tty
)
1034 symbol_file_add_main_1 (args
, from_tty
, 0);
1038 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1040 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1043 RESET_HP_UX_GLOBALS ();
1046 /* Getting new symbols may change our opinion about
1047 what is frameless. */
1048 reinit_frame_cache ();
1050 set_initial_language ();
1054 symbol_file_clear (int from_tty
)
1056 if ((have_full_symbols () || have_partial_symbols ())
1058 && !query ("Discard symbol table from `%s'? ",
1059 symfile_objfile
->name
))
1060 error ("Not confirmed.");
1061 free_all_objfiles ();
1063 /* solib descriptors may have handles to objfiles. Since their
1064 storage has just been released, we'd better wipe the solib
1065 descriptors as well.
1067 #if defined(SOLIB_RESTART)
1071 symfile_objfile
= NULL
;
1073 printf_unfiltered ("No symbol file now.\n");
1075 RESET_HP_UX_GLOBALS ();
1080 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1083 bfd_size_type debuglink_size
;
1084 unsigned long crc32
;
1089 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1094 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1096 contents
= xmalloc (debuglink_size
);
1097 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1098 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1100 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1101 crc_offset
= strlen (contents
) + 1;
1102 crc_offset
= (crc_offset
+ 3) & ~3;
1104 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1111 separate_debug_file_exists (const char *name
, unsigned long crc
)
1113 unsigned long file_crc
= 0;
1115 char buffer
[8*1024];
1118 fd
= open (name
, O_RDONLY
| O_BINARY
);
1122 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1123 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1127 return crc
== file_crc
;
1130 static char *debug_file_directory
= NULL
;
1132 #if ! defined (DEBUG_SUBDIRECTORY)
1133 #define DEBUG_SUBDIRECTORY ".debug"
1137 find_separate_debug_file (struct objfile
*objfile
)
1144 bfd_size_type debuglink_size
;
1145 unsigned long crc32
;
1148 basename
= get_debug_link_info (objfile
, &crc32
);
1150 if (basename
== NULL
)
1153 dir
= xstrdup (objfile
->name
);
1155 /* Strip off the final filename part, leaving the directory name,
1156 followed by a slash. Objfile names should always be absolute and
1157 tilde-expanded, so there should always be a slash in there
1159 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1161 if (IS_DIR_SEPARATOR (dir
[i
]))
1164 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1167 debugfile
= alloca (strlen (debug_file_directory
) + 1
1169 + strlen (DEBUG_SUBDIRECTORY
)
1174 /* First try in the same directory as the original file. */
1175 strcpy (debugfile
, dir
);
1176 strcat (debugfile
, basename
);
1178 if (separate_debug_file_exists (debugfile
, crc32
))
1182 return xstrdup (debugfile
);
1185 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1186 strcpy (debugfile
, dir
);
1187 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1188 strcat (debugfile
, "/");
1189 strcat (debugfile
, basename
);
1191 if (separate_debug_file_exists (debugfile
, crc32
))
1195 return xstrdup (debugfile
);
1198 /* Then try in the global debugfile directory. */
1199 strcpy (debugfile
, debug_file_directory
);
1200 strcat (debugfile
, "/");
1201 strcat (debugfile
, dir
);
1202 strcat (debugfile
, basename
);
1204 if (separate_debug_file_exists (debugfile
, crc32
))
1208 return xstrdup (debugfile
);
1217 /* This is the symbol-file command. Read the file, analyze its
1218 symbols, and add a struct symtab to a symtab list. The syntax of
1219 the command is rather bizarre--(1) buildargv implements various
1220 quoting conventions which are undocumented and have little or
1221 nothing in common with the way things are quoted (or not quoted)
1222 elsewhere in GDB, (2) options are used, which are not generally
1223 used in GDB (perhaps "set mapped on", "set readnow on" would be
1224 better), (3) the order of options matters, which is contrary to GNU
1225 conventions (because it is confusing and inconvenient). */
1226 /* Note: ezannoni 2000-04-17. This function used to have support for
1227 rombug (see remote-os9k.c). It consisted of a call to target_link()
1228 (target.c) to get the address of the text segment from the target,
1229 and pass that to symbol_file_add(). This is no longer supported. */
1232 symbol_file_command (char *args
, int from_tty
)
1236 struct cleanup
*cleanups
;
1237 int flags
= OBJF_USERLOADED
;
1243 symbol_file_clear (from_tty
);
1247 if ((argv
= buildargv (args
)) == NULL
)
1251 cleanups
= make_cleanup_freeargv (argv
);
1252 while (*argv
!= NULL
)
1254 if (STREQ (*argv
, "-mapped"))
1255 flags
|= OBJF_MAPPED
;
1257 if (STREQ (*argv
, "-readnow"))
1258 flags
|= OBJF_READNOW
;
1261 error ("unknown option `%s'", *argv
);
1266 symbol_file_add_main_1 (name
, from_tty
, flags
);
1273 error ("no symbol file name was specified");
1275 do_cleanups (cleanups
);
1279 /* Set the initial language.
1281 A better solution would be to record the language in the psymtab when reading
1282 partial symbols, and then use it (if known) to set the language. This would
1283 be a win for formats that encode the language in an easily discoverable place,
1284 such as DWARF. For stabs, we can jump through hoops looking for specially
1285 named symbols or try to intuit the language from the specific type of stabs
1286 we find, but we can't do that until later when we read in full symbols.
1290 set_initial_language (void)
1292 struct partial_symtab
*pst
;
1293 enum language lang
= language_unknown
;
1295 pst
= find_main_psymtab ();
1298 if (pst
->filename
!= NULL
)
1300 lang
= deduce_language_from_filename (pst
->filename
);
1302 if (lang
== language_unknown
)
1304 /* Make C the default language */
1307 set_language (lang
);
1308 expected_language
= current_language
; /* Don't warn the user */
1312 /* Open file specified by NAME and hand it off to BFD for preliminary
1313 analysis. Result is a newly initialized bfd *, which includes a newly
1314 malloc'd` copy of NAME (tilde-expanded and made absolute).
1315 In case of trouble, error() is called. */
1318 symfile_bfd_open (char *name
)
1322 char *absolute_name
;
1326 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1328 /* Look down path for it, allocate 2nd new malloc'd copy. */
1329 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1330 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1333 char *exename
= alloca (strlen (name
) + 5);
1334 strcat (strcpy (exename
, name
), ".exe");
1335 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1341 make_cleanup (xfree
, name
);
1342 perror_with_name (name
);
1344 xfree (name
); /* Free 1st new malloc'd copy */
1345 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1346 /* It'll be freed in free_objfile(). */
1348 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1352 make_cleanup (xfree
, name
);
1353 error ("\"%s\": can't open to read symbols: %s.", name
,
1354 bfd_errmsg (bfd_get_error ()));
1356 sym_bfd
->cacheable
= 1;
1358 if (!bfd_check_format (sym_bfd
, bfd_object
))
1360 /* FIXME: should be checking for errors from bfd_close (for one thing,
1361 on error it does not free all the storage associated with the
1363 bfd_close (sym_bfd
); /* This also closes desc */
1364 make_cleanup (xfree
, name
);
1365 error ("\"%s\": can't read symbols: %s.", name
,
1366 bfd_errmsg (bfd_get_error ()));
1371 /* Return the section index for the given section name. Return -1 if
1372 the section was not found. */
1374 get_section_index (struct objfile
*objfile
, char *section_name
)
1376 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1383 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1384 startup by the _initialize routine in each object file format reader,
1385 to register information about each format the the reader is prepared
1389 add_symtab_fns (struct sym_fns
*sf
)
1391 sf
->next
= symtab_fns
;
1396 /* Initialize to read symbols from the symbol file sym_bfd. It either
1397 returns or calls error(). The result is an initialized struct sym_fns
1398 in the objfile structure, that contains cached information about the
1402 find_sym_fns (struct objfile
*objfile
)
1405 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1406 char *our_target
= bfd_get_target (objfile
->obfd
);
1408 if (our_flavour
== bfd_target_srec_flavour
1409 || our_flavour
== bfd_target_ihex_flavour
1410 || our_flavour
== bfd_target_tekhex_flavour
)
1411 return; /* No symbols. */
1413 /* Special kludge for apollo. See dstread.c. */
1414 if (STREQN (our_target
, "apollo", 6))
1415 our_flavour
= (enum bfd_flavour
) -2;
1417 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1419 if (our_flavour
== sf
->sym_flavour
)
1425 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1426 bfd_get_target (objfile
->obfd
));
1429 /* This function runs the load command of our current target. */
1432 load_command (char *arg
, int from_tty
)
1435 arg
= get_exec_file (1);
1436 target_load (arg
, from_tty
);
1438 /* After re-loading the executable, we don't really know which
1439 overlays are mapped any more. */
1440 overlay_cache_invalid
= 1;
1443 /* This version of "load" should be usable for any target. Currently
1444 it is just used for remote targets, not inftarg.c or core files,
1445 on the theory that only in that case is it useful.
1447 Avoiding xmodem and the like seems like a win (a) because we don't have
1448 to worry about finding it, and (b) On VMS, fork() is very slow and so
1449 we don't want to run a subprocess. On the other hand, I'm not sure how
1450 performance compares. */
1452 static int download_write_size
= 512;
1453 static int validate_download
= 0;
1455 /* Callback service function for generic_load (bfd_map_over_sections). */
1458 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1460 bfd_size_type
*sum
= data
;
1462 *sum
+= bfd_get_section_size_before_reloc (asec
);
1465 /* Opaque data for load_section_callback. */
1466 struct load_section_data
{
1467 unsigned long load_offset
;
1468 unsigned long write_count
;
1469 unsigned long data_count
;
1470 bfd_size_type total_size
;
1473 /* Callback service function for generic_load (bfd_map_over_sections). */
1476 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1478 struct load_section_data
*args
= data
;
1480 if (bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
)
1482 bfd_size_type size
= bfd_get_section_size_before_reloc (asec
);
1486 struct cleanup
*old_chain
;
1487 CORE_ADDR lma
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1488 bfd_size_type block_size
;
1490 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1493 if (download_write_size
> 0 && size
> download_write_size
)
1494 block_size
= download_write_size
;
1498 buffer
= xmalloc (size
);
1499 old_chain
= make_cleanup (xfree
, buffer
);
1501 /* Is this really necessary? I guess it gives the user something
1502 to look at during a long download. */
1503 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1504 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1506 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1512 bfd_size_type this_transfer
= size
- sent
;
1514 if (this_transfer
>= block_size
)
1515 this_transfer
= block_size
;
1516 len
= target_write_memory_partial (lma
, buffer
,
1517 this_transfer
, &err
);
1520 if (validate_download
)
1522 /* Broken memories and broken monitors manifest
1523 themselves here when bring new computers to
1524 life. This doubles already slow downloads. */
1525 /* NOTE: cagney/1999-10-18: A more efficient
1526 implementation might add a verify_memory()
1527 method to the target vector and then use
1528 that. remote.c could implement that method
1529 using the ``qCRC'' packet. */
1530 char *check
= xmalloc (len
);
1531 struct cleanup
*verify_cleanups
=
1532 make_cleanup (xfree
, check
);
1534 if (target_read_memory (lma
, check
, len
) != 0)
1535 error ("Download verify read failed at 0x%s",
1537 if (memcmp (buffer
, check
, len
) != 0)
1538 error ("Download verify compare failed at 0x%s",
1540 do_cleanups (verify_cleanups
);
1542 args
->data_count
+= len
;
1545 args
->write_count
+= 1;
1548 || (ui_load_progress_hook
!= NULL
1549 && ui_load_progress_hook (sect_name
, sent
)))
1550 error ("Canceled the download");
1552 if (show_load_progress
!= NULL
)
1553 show_load_progress (sect_name
, sent
, size
,
1554 args
->data_count
, args
->total_size
);
1556 while (sent
< size
);
1559 error ("Memory access error while loading section %s.", sect_name
);
1561 do_cleanups (old_chain
);
1567 generic_load (char *args
, int from_tty
)
1571 time_t start_time
, end_time
; /* Start and end times of download */
1573 struct cleanup
*old_cleanups
;
1575 struct load_section_data cbdata
;
1578 cbdata
.load_offset
= 0; /* Offset to add to vma for each section. */
1579 cbdata
.write_count
= 0; /* Number of writes needed. */
1580 cbdata
.data_count
= 0; /* Number of bytes written to target memory. */
1581 cbdata
.total_size
= 0; /* Total size of all bfd sectors. */
1583 /* Parse the input argument - the user can specify a load offset as
1584 a second argument. */
1585 filename
= xmalloc (strlen (args
) + 1);
1586 old_cleanups
= make_cleanup (xfree
, filename
);
1587 strcpy (filename
, args
);
1588 offptr
= strchr (filename
, ' ');
1593 cbdata
.load_offset
= strtoul (offptr
, &endptr
, 0);
1594 if (offptr
== endptr
)
1595 error ("Invalid download offset:%s\n", offptr
);
1599 cbdata
.load_offset
= 0;
1601 /* Open the file for loading. */
1602 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1603 if (loadfile_bfd
== NULL
)
1605 perror_with_name (filename
);
1609 /* FIXME: should be checking for errors from bfd_close (for one thing,
1610 on error it does not free all the storage associated with the
1612 make_cleanup_bfd_close (loadfile_bfd
);
1614 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1616 error ("\"%s\" is not an object file: %s", filename
,
1617 bfd_errmsg (bfd_get_error ()));
1620 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1621 (void *) &cbdata
.total_size
);
1623 start_time
= time (NULL
);
1625 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1627 end_time
= time (NULL
);
1629 entry
= bfd_get_start_address (loadfile_bfd
);
1630 ui_out_text (uiout
, "Start address ");
1631 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1632 ui_out_text (uiout
, ", load size ");
1633 ui_out_field_fmt (uiout
, "load-size", "%lu", cbdata
.data_count
);
1634 ui_out_text (uiout
, "\n");
1635 /* We were doing this in remote-mips.c, I suspect it is right
1636 for other targets too. */
1639 /* FIXME: are we supposed to call symbol_file_add or not? According
1640 to a comment from remote-mips.c (where a call to symbol_file_add
1641 was commented out), making the call confuses GDB if more than one
1642 file is loaded in. Some targets do (e.g., remote-vx.c) but
1643 others don't (or didn't - perhaphs they have all been deleted). */
1645 print_transfer_performance (gdb_stdout
, cbdata
.data_count
,
1646 cbdata
.write_count
, end_time
- start_time
);
1648 do_cleanups (old_cleanups
);
1651 /* Report how fast the transfer went. */
1653 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1654 replaced by print_transfer_performance (with a very different
1655 function signature). */
1658 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1661 print_transfer_performance (gdb_stdout
, data_count
,
1662 end_time
- start_time
, 0);
1666 print_transfer_performance (struct ui_file
*stream
,
1667 unsigned long data_count
,
1668 unsigned long write_count
,
1669 unsigned long time_count
)
1671 ui_out_text (uiout
, "Transfer rate: ");
1674 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1675 (data_count
* 8) / time_count
);
1676 ui_out_text (uiout
, " bits/sec");
1680 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1681 ui_out_text (uiout
, " bits in <1 sec");
1683 if (write_count
> 0)
1685 ui_out_text (uiout
, ", ");
1686 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1687 ui_out_text (uiout
, " bytes/write");
1689 ui_out_text (uiout
, ".\n");
1692 /* This function allows the addition of incrementally linked object files.
1693 It does not modify any state in the target, only in the debugger. */
1694 /* Note: ezannoni 2000-04-13 This function/command used to have a
1695 special case syntax for the rombug target (Rombug is the boot
1696 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1697 rombug case, the user doesn't need to supply a text address,
1698 instead a call to target_link() (in target.c) would supply the
1699 value to use. We are now discontinuing this type of ad hoc syntax. */
1703 add_symbol_file_command (char *args
, int from_tty
)
1705 char *filename
= NULL
;
1706 int flags
= OBJF_USERLOADED
;
1708 int expecting_option
= 0;
1709 int section_index
= 0;
1713 int expecting_sec_name
= 0;
1714 int expecting_sec_addr
= 0;
1722 struct section_addr_info
*section_addrs
;
1723 struct sect_opt
*sect_opts
= NULL
;
1724 size_t num_sect_opts
= 0;
1725 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1728 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1729 * sizeof (struct sect_opt
));
1734 error ("add-symbol-file takes a file name and an address");
1736 /* Make a copy of the string that we can safely write into. */
1737 args
= xstrdup (args
);
1739 while (*args
!= '\000')
1741 /* Any leading spaces? */
1742 while (isspace (*args
))
1745 /* Point arg to the beginning of the argument. */
1748 /* Move args pointer over the argument. */
1749 while ((*args
!= '\000') && !isspace (*args
))
1752 /* If there are more arguments, terminate arg and
1754 if (*args
!= '\000')
1757 /* Now process the argument. */
1760 /* The first argument is the file name. */
1761 filename
= tilde_expand (arg
);
1762 make_cleanup (xfree
, filename
);
1767 /* The second argument is always the text address at which
1768 to load the program. */
1769 sect_opts
[section_index
].name
= ".text";
1770 sect_opts
[section_index
].value
= arg
;
1771 if (++section_index
> num_sect_opts
)
1774 sect_opts
= ((struct sect_opt
*)
1775 xrealloc (sect_opts
,
1777 * sizeof (struct sect_opt
)));
1782 /* It's an option (starting with '-') or it's an argument
1787 if (strcmp (arg
, "-mapped") == 0)
1788 flags
|= OBJF_MAPPED
;
1790 if (strcmp (arg
, "-readnow") == 0)
1791 flags
|= OBJF_READNOW
;
1793 if (strcmp (arg
, "-s") == 0)
1795 expecting_sec_name
= 1;
1796 expecting_sec_addr
= 1;
1801 if (expecting_sec_name
)
1803 sect_opts
[section_index
].name
= arg
;
1804 expecting_sec_name
= 0;
1807 if (expecting_sec_addr
)
1809 sect_opts
[section_index
].value
= arg
;
1810 expecting_sec_addr
= 0;
1811 if (++section_index
> num_sect_opts
)
1814 sect_opts
= ((struct sect_opt
*)
1815 xrealloc (sect_opts
,
1817 * sizeof (struct sect_opt
)));
1821 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1827 /* Print the prompt for the query below. And save the arguments into
1828 a sect_addr_info structure to be passed around to other
1829 functions. We have to split this up into separate print
1830 statements because local_hex_string returns a local static
1833 printf_filtered ("add symbol table from file \"%s\" at\n", filename
);
1834 section_addrs
= alloc_section_addr_info (section_index
);
1835 make_cleanup (xfree
, section_addrs
);
1836 for (i
= 0; i
< section_index
; i
++)
1839 char *val
= sect_opts
[i
].value
;
1840 char *sec
= sect_opts
[i
].name
;
1842 val
= sect_opts
[i
].value
;
1843 if (val
[0] == '0' && val
[1] == 'x')
1844 addr
= strtoul (val
+2, NULL
, 16);
1846 addr
= strtoul (val
, NULL
, 10);
1848 /* Here we store the section offsets in the order they were
1849 entered on the command line. */
1850 section_addrs
->other
[sec_num
].name
= sec
;
1851 section_addrs
->other
[sec_num
].addr
= addr
;
1852 printf_filtered ("\t%s_addr = %s\n",
1854 local_hex_string ((unsigned long)addr
));
1857 /* The object's sections are initialized when a
1858 call is made to build_objfile_section_table (objfile).
1859 This happens in reread_symbols.
1860 At this point, we don't know what file type this is,
1861 so we can't determine what section names are valid. */
1864 if (from_tty
&& (!query ("%s", "")))
1865 error ("Not confirmed.");
1867 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
1869 /* Getting new symbols may change our opinion about what is
1871 reinit_frame_cache ();
1872 do_cleanups (my_cleanups
);
1876 add_shared_symbol_files_command (char *args
, int from_tty
)
1878 #ifdef ADD_SHARED_SYMBOL_FILES
1879 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1881 error ("This command is not available in this configuration of GDB.");
1885 /* Re-read symbols if a symbol-file has changed. */
1887 reread_symbols (void)
1889 struct objfile
*objfile
;
1892 struct stat new_statbuf
;
1895 /* With the addition of shared libraries, this should be modified,
1896 the load time should be saved in the partial symbol tables, since
1897 different tables may come from different source files. FIXME.
1898 This routine should then walk down each partial symbol table
1899 and see if the symbol table that it originates from has been changed */
1901 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1905 #ifdef IBM6000_TARGET
1906 /* If this object is from a shared library, then you should
1907 stat on the library name, not member name. */
1909 if (objfile
->obfd
->my_archive
)
1910 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1913 res
= stat (objfile
->name
, &new_statbuf
);
1916 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1917 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1921 new_modtime
= new_statbuf
.st_mtime
;
1922 if (new_modtime
!= objfile
->mtime
)
1924 struct cleanup
*old_cleanups
;
1925 struct section_offsets
*offsets
;
1927 char *obfd_filename
;
1929 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1932 /* There are various functions like symbol_file_add,
1933 symfile_bfd_open, syms_from_objfile, etc., which might
1934 appear to do what we want. But they have various other
1935 effects which we *don't* want. So we just do stuff
1936 ourselves. We don't worry about mapped files (for one thing,
1937 any mapped file will be out of date). */
1939 /* If we get an error, blow away this objfile (not sure if
1940 that is the correct response for things like shared
1942 old_cleanups
= make_cleanup_free_objfile (objfile
);
1943 /* We need to do this whenever any symbols go away. */
1944 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
1946 /* Clean up any state BFD has sitting around. We don't need
1947 to close the descriptor but BFD lacks a way of closing the
1948 BFD without closing the descriptor. */
1949 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1950 if (!bfd_close (objfile
->obfd
))
1951 error ("Can't close BFD for %s: %s", objfile
->name
,
1952 bfd_errmsg (bfd_get_error ()));
1953 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1954 if (objfile
->obfd
== NULL
)
1955 error ("Can't open %s to read symbols.", objfile
->name
);
1956 /* bfd_openr sets cacheable to true, which is what we want. */
1957 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1958 error ("Can't read symbols from %s: %s.", objfile
->name
,
1959 bfd_errmsg (bfd_get_error ()));
1961 /* Save the offsets, we will nuke them with the rest of the
1963 num_offsets
= objfile
->num_sections
;
1964 offsets
= ((struct section_offsets
*)
1965 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
1966 memcpy (offsets
, objfile
->section_offsets
,
1967 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
1969 /* Nuke all the state that we will re-read. Much of the following
1970 code which sets things to NULL really is necessary to tell
1971 other parts of GDB that there is nothing currently there. */
1973 /* FIXME: Do we have to free a whole linked list, or is this
1975 if (objfile
->global_psymbols
.list
)
1976 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
1977 memset (&objfile
->global_psymbols
, 0,
1978 sizeof (objfile
->global_psymbols
));
1979 if (objfile
->static_psymbols
.list
)
1980 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
1981 memset (&objfile
->static_psymbols
, 0,
1982 sizeof (objfile
->static_psymbols
));
1984 /* Free the obstacks for non-reusable objfiles */
1985 bcache_xfree (objfile
->psymbol_cache
);
1986 objfile
->psymbol_cache
= bcache_xmalloc ();
1987 bcache_xfree (objfile
->macro_cache
);
1988 objfile
->macro_cache
= bcache_xmalloc ();
1989 if (objfile
->demangled_names_hash
!= NULL
)
1991 htab_delete (objfile
->demangled_names_hash
);
1992 objfile
->demangled_names_hash
= NULL
;
1994 obstack_free (&objfile
->psymbol_obstack
, 0);
1995 obstack_free (&objfile
->symbol_obstack
, 0);
1996 obstack_free (&objfile
->type_obstack
, 0);
1997 objfile
->sections
= NULL
;
1998 objfile
->symtabs
= NULL
;
1999 objfile
->psymtabs
= NULL
;
2000 objfile
->free_psymtabs
= NULL
;
2001 objfile
->msymbols
= NULL
;
2002 objfile
->minimal_symbol_count
= 0;
2003 memset (&objfile
->msymbol_hash
, 0,
2004 sizeof (objfile
->msymbol_hash
));
2005 memset (&objfile
->msymbol_demangled_hash
, 0,
2006 sizeof (objfile
->msymbol_demangled_hash
));
2007 objfile
->fundamental_types
= NULL
;
2008 if (objfile
->sf
!= NULL
)
2010 (*objfile
->sf
->sym_finish
) (objfile
);
2013 /* We never make this a mapped file. */
2015 /* obstack_specify_allocation also initializes the obstack so
2017 objfile
->psymbol_cache
= bcache_xmalloc ();
2018 objfile
->macro_cache
= bcache_xmalloc ();
2019 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
2021 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
2023 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
2025 if (build_objfile_section_table (objfile
))
2027 error ("Can't find the file sections in `%s': %s",
2028 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2030 terminate_minimal_symbol_table (objfile
);
2032 /* We use the same section offsets as from last time. I'm not
2033 sure whether that is always correct for shared libraries. */
2034 objfile
->section_offsets
= (struct section_offsets
*)
2035 obstack_alloc (&objfile
->psymbol_obstack
,
2036 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2037 memcpy (objfile
->section_offsets
, offsets
,
2038 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2039 objfile
->num_sections
= num_offsets
;
2041 /* What the hell is sym_new_init for, anyway? The concept of
2042 distinguishing between the main file and additional files
2043 in this way seems rather dubious. */
2044 if (objfile
== symfile_objfile
)
2046 (*objfile
->sf
->sym_new_init
) (objfile
);
2048 RESET_HP_UX_GLOBALS ();
2052 (*objfile
->sf
->sym_init
) (objfile
);
2053 clear_complaints (&symfile_complaints
, 1, 1);
2054 /* The "mainline" parameter is a hideous hack; I think leaving it
2055 zero is OK since dbxread.c also does what it needs to do if
2056 objfile->global_psymbols.size is 0. */
2057 (*objfile
->sf
->sym_read
) (objfile
, 0);
2058 if (!have_partial_symbols () && !have_full_symbols ())
2061 printf_filtered ("(no debugging symbols found)\n");
2064 objfile
->flags
|= OBJF_SYMS
;
2066 /* We're done reading the symbol file; finish off complaints. */
2067 clear_complaints (&symfile_complaints
, 0, 1);
2069 /* Getting new symbols may change our opinion about what is
2072 reinit_frame_cache ();
2074 /* Discard cleanups as symbol reading was successful. */
2075 discard_cleanups (old_cleanups
);
2077 /* If the mtime has changed between the time we set new_modtime
2078 and now, we *want* this to be out of date, so don't call stat
2080 objfile
->mtime
= new_modtime
;
2082 reread_separate_symbols (objfile
);
2088 clear_symtab_users ();
2092 /* Handle separate debug info for OBJFILE, which has just been
2094 - If we had separate debug info before, but now we don't, get rid
2095 of the separated objfile.
2096 - If we didn't have separated debug info before, but now we do,
2097 read in the new separated debug info file.
2098 - If the debug link points to a different file, toss the old one
2099 and read the new one.
2100 This function does *not* handle the case where objfile is still
2101 using the same separate debug info file, but that file's timestamp
2102 has changed. That case should be handled by the loop in
2103 reread_symbols already. */
2105 reread_separate_symbols (struct objfile
*objfile
)
2108 unsigned long crc32
;
2110 /* Does the updated objfile's debug info live in a
2112 debug_file
= find_separate_debug_file (objfile
);
2114 if (objfile
->separate_debug_objfile
)
2116 /* There are two cases where we need to get rid of
2117 the old separated debug info objfile:
2118 - if the new primary objfile doesn't have
2119 separated debug info, or
2120 - if the new primary objfile has separate debug
2121 info, but it's under a different filename.
2123 If the old and new objfiles both have separate
2124 debug info, under the same filename, then we're
2125 okay --- if the separated file's contents have
2126 changed, we will have caught that when we
2127 visited it in this function's outermost
2130 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2131 free_objfile (objfile
->separate_debug_objfile
);
2134 /* If the new objfile has separate debug info, and we
2135 haven't loaded it already, do so now. */
2137 && ! objfile
->separate_debug_objfile
)
2139 /* Use the same section offset table as objfile itself.
2140 Preserve the flags from objfile that make sense. */
2141 objfile
->separate_debug_objfile
2142 = (symbol_file_add_with_addrs_or_offsets
2144 info_verbose
, /* from_tty: Don't override the default. */
2145 0, /* No addr table. */
2146 objfile
->section_offsets
, objfile
->num_sections
,
2147 0, /* Not mainline. See comments about this above. */
2148 objfile
->flags
& (OBJF_MAPPED
| OBJF_REORDERED
2149 | OBJF_SHARED
| OBJF_READNOW
2150 | OBJF_USERLOADED
)));
2151 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2167 static filename_language
*filename_language_table
;
2168 static int fl_table_size
, fl_table_next
;
2171 add_filename_language (char *ext
, enum language lang
)
2173 if (fl_table_next
>= fl_table_size
)
2175 fl_table_size
+= 10;
2176 filename_language_table
=
2177 xrealloc (filename_language_table
,
2178 fl_table_size
* sizeof (*filename_language_table
));
2181 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2182 filename_language_table
[fl_table_next
].lang
= lang
;
2186 static char *ext_args
;
2189 set_ext_lang_command (char *args
, int from_tty
)
2192 char *cp
= ext_args
;
2195 /* First arg is filename extension, starting with '.' */
2197 error ("'%s': Filename extension must begin with '.'", ext_args
);
2199 /* Find end of first arg. */
2200 while (*cp
&& !isspace (*cp
))
2204 error ("'%s': two arguments required -- filename extension and language",
2207 /* Null-terminate first arg */
2210 /* Find beginning of second arg, which should be a source language. */
2211 while (*cp
&& isspace (*cp
))
2215 error ("'%s': two arguments required -- filename extension and language",
2218 /* Lookup the language from among those we know. */
2219 lang
= language_enum (cp
);
2221 /* Now lookup the filename extension: do we already know it? */
2222 for (i
= 0; i
< fl_table_next
; i
++)
2223 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2226 if (i
>= fl_table_next
)
2228 /* new file extension */
2229 add_filename_language (ext_args
, lang
);
2233 /* redefining a previously known filename extension */
2236 /* query ("Really make files of type %s '%s'?", */
2237 /* ext_args, language_str (lang)); */
2239 xfree (filename_language_table
[i
].ext
);
2240 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2241 filename_language_table
[i
].lang
= lang
;
2246 info_ext_lang_command (char *args
, int from_tty
)
2250 printf_filtered ("Filename extensions and the languages they represent:");
2251 printf_filtered ("\n\n");
2252 for (i
= 0; i
< fl_table_next
; i
++)
2253 printf_filtered ("\t%s\t- %s\n",
2254 filename_language_table
[i
].ext
,
2255 language_str (filename_language_table
[i
].lang
));
2259 init_filename_language_table (void)
2261 if (fl_table_size
== 0) /* protect against repetition */
2265 filename_language_table
=
2266 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2267 add_filename_language (".c", language_c
);
2268 add_filename_language (".C", language_cplus
);
2269 add_filename_language (".cc", language_cplus
);
2270 add_filename_language (".cp", language_cplus
);
2271 add_filename_language (".cpp", language_cplus
);
2272 add_filename_language (".cxx", language_cplus
);
2273 add_filename_language (".c++", language_cplus
);
2274 add_filename_language (".java", language_java
);
2275 add_filename_language (".class", language_java
);
2276 add_filename_language (".m", language_objc
);
2277 add_filename_language (".f", language_fortran
);
2278 add_filename_language (".F", language_fortran
);
2279 add_filename_language (".s", language_asm
);
2280 add_filename_language (".S", language_asm
);
2281 add_filename_language (".pas", language_pascal
);
2282 add_filename_language (".p", language_pascal
);
2283 add_filename_language (".pp", language_pascal
);
2288 deduce_language_from_filename (char *filename
)
2293 if (filename
!= NULL
)
2294 if ((cp
= strrchr (filename
, '.')) != NULL
)
2295 for (i
= 0; i
< fl_table_next
; i
++)
2296 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2297 return filename_language_table
[i
].lang
;
2299 return language_unknown
;
2304 Allocate and partly initialize a new symbol table. Return a pointer
2305 to it. error() if no space.
2307 Caller must set these fields:
2313 possibly free_named_symtabs (symtab->filename);
2317 allocate_symtab (char *filename
, struct objfile
*objfile
)
2319 register struct symtab
*symtab
;
2321 symtab
= (struct symtab
*)
2322 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
2323 memset (symtab
, 0, sizeof (*symtab
));
2324 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2325 &objfile
->symbol_obstack
);
2326 symtab
->fullname
= NULL
;
2327 symtab
->language
= deduce_language_from_filename (filename
);
2328 symtab
->debugformat
= obsavestring ("unknown", 7,
2329 &objfile
->symbol_obstack
);
2331 /* Hook it to the objfile it comes from */
2333 symtab
->objfile
= objfile
;
2334 symtab
->next
= objfile
->symtabs
;
2335 objfile
->symtabs
= symtab
;
2337 /* FIXME: This should go away. It is only defined for the Z8000,
2338 and the Z8000 definition of this macro doesn't have anything to
2339 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2340 here for convenience. */
2341 #ifdef INIT_EXTRA_SYMTAB_INFO
2342 INIT_EXTRA_SYMTAB_INFO (symtab
);
2348 struct partial_symtab
*
2349 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2351 struct partial_symtab
*psymtab
;
2353 if (objfile
->free_psymtabs
)
2355 psymtab
= objfile
->free_psymtabs
;
2356 objfile
->free_psymtabs
= psymtab
->next
;
2359 psymtab
= (struct partial_symtab
*)
2360 obstack_alloc (&objfile
->psymbol_obstack
,
2361 sizeof (struct partial_symtab
));
2363 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2364 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2365 &objfile
->psymbol_obstack
);
2366 psymtab
->symtab
= NULL
;
2368 /* Prepend it to the psymtab list for the objfile it belongs to.
2369 Psymtabs are searched in most recent inserted -> least recent
2372 psymtab
->objfile
= objfile
;
2373 psymtab
->next
= objfile
->psymtabs
;
2374 objfile
->psymtabs
= psymtab
;
2377 struct partial_symtab
**prev_pst
;
2378 psymtab
->objfile
= objfile
;
2379 psymtab
->next
= NULL
;
2380 prev_pst
= &(objfile
->psymtabs
);
2381 while ((*prev_pst
) != NULL
)
2382 prev_pst
= &((*prev_pst
)->next
);
2383 (*prev_pst
) = psymtab
;
2391 discard_psymtab (struct partial_symtab
*pst
)
2393 struct partial_symtab
**prev_pst
;
2396 Empty psymtabs happen as a result of header files which don't
2397 have any symbols in them. There can be a lot of them. But this
2398 check is wrong, in that a psymtab with N_SLINE entries but
2399 nothing else is not empty, but we don't realize that. Fixing
2400 that without slowing things down might be tricky. */
2402 /* First, snip it out of the psymtab chain */
2404 prev_pst
= &(pst
->objfile
->psymtabs
);
2405 while ((*prev_pst
) != pst
)
2406 prev_pst
= &((*prev_pst
)->next
);
2407 (*prev_pst
) = pst
->next
;
2409 /* Next, put it on a free list for recycling */
2411 pst
->next
= pst
->objfile
->free_psymtabs
;
2412 pst
->objfile
->free_psymtabs
= pst
;
2416 /* Reset all data structures in gdb which may contain references to symbol
2420 clear_symtab_users (void)
2422 /* Someday, we should do better than this, by only blowing away
2423 the things that really need to be blown. */
2424 clear_value_history ();
2426 clear_internalvars ();
2427 breakpoint_re_set ();
2428 set_default_breakpoint (0, 0, 0, 0);
2429 clear_current_source_symtab_and_line ();
2430 clear_pc_function_cache ();
2431 if (target_new_objfile_hook
)
2432 target_new_objfile_hook (NULL
);
2436 clear_symtab_users_cleanup (void *ignore
)
2438 clear_symtab_users ();
2441 /* clear_symtab_users_once:
2443 This function is run after symbol reading, or from a cleanup.
2444 If an old symbol table was obsoleted, the old symbol table
2445 has been blown away, but the other GDB data structures that may
2446 reference it have not yet been cleared or re-directed. (The old
2447 symtab was zapped, and the cleanup queued, in free_named_symtab()
2450 This function can be queued N times as a cleanup, or called
2451 directly; it will do all the work the first time, and then will be a
2452 no-op until the next time it is queued. This works by bumping a
2453 counter at queueing time. Much later when the cleanup is run, or at
2454 the end of symbol processing (in case the cleanup is discarded), if
2455 the queued count is greater than the "done-count", we do the work
2456 and set the done-count to the queued count. If the queued count is
2457 less than or equal to the done-count, we just ignore the call. This
2458 is needed because reading a single .o file will often replace many
2459 symtabs (one per .h file, for example), and we don't want to reset
2460 the breakpoints N times in the user's face.
2462 The reason we both queue a cleanup, and call it directly after symbol
2463 reading, is because the cleanup protects us in case of errors, but is
2464 discarded if symbol reading is successful. */
2467 /* FIXME: As free_named_symtabs is currently a big noop this function
2468 is no longer needed. */
2469 static void clear_symtab_users_once (void);
2471 static int clear_symtab_users_queued
;
2472 static int clear_symtab_users_done
;
2475 clear_symtab_users_once (void)
2477 /* Enforce once-per-`do_cleanups'-semantics */
2478 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2480 clear_symtab_users_done
= clear_symtab_users_queued
;
2482 clear_symtab_users ();
2486 /* Delete the specified psymtab, and any others that reference it. */
2489 cashier_psymtab (struct partial_symtab
*pst
)
2491 struct partial_symtab
*ps
, *pprev
= NULL
;
2494 /* Find its previous psymtab in the chain */
2495 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2504 /* Unhook it from the chain. */
2505 if (ps
== pst
->objfile
->psymtabs
)
2506 pst
->objfile
->psymtabs
= ps
->next
;
2508 pprev
->next
= ps
->next
;
2510 /* FIXME, we can't conveniently deallocate the entries in the
2511 partial_symbol lists (global_psymbols/static_psymbols) that
2512 this psymtab points to. These just take up space until all
2513 the psymtabs are reclaimed. Ditto the dependencies list and
2514 filename, which are all in the psymbol_obstack. */
2516 /* We need to cashier any psymtab that has this one as a dependency... */
2518 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2520 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2522 if (ps
->dependencies
[i
] == pst
)
2524 cashier_psymtab (ps
);
2525 goto again
; /* Must restart, chain has been munged. */
2532 /* If a symtab or psymtab for filename NAME is found, free it along
2533 with any dependent breakpoints, displays, etc.
2534 Used when loading new versions of object modules with the "add-file"
2535 command. This is only called on the top-level symtab or psymtab's name;
2536 it is not called for subsidiary files such as .h files.
2538 Return value is 1 if we blew away the environment, 0 if not.
2539 FIXME. The return value appears to never be used.
2541 FIXME. I think this is not the best way to do this. We should
2542 work on being gentler to the environment while still cleaning up
2543 all stray pointers into the freed symtab. */
2546 free_named_symtabs (char *name
)
2549 /* FIXME: With the new method of each objfile having it's own
2550 psymtab list, this function needs serious rethinking. In particular,
2551 why was it ever necessary to toss psymtabs with specific compilation
2552 unit filenames, as opposed to all psymtabs from a particular symbol
2554 Well, the answer is that some systems permit reloading of particular
2555 compilation units. We want to blow away any old info about these
2556 compilation units, regardless of which objfiles they arrived in. --gnu. */
2558 register struct symtab
*s
;
2559 register struct symtab
*prev
;
2560 register struct partial_symtab
*ps
;
2561 struct blockvector
*bv
;
2564 /* We only wack things if the symbol-reload switch is set. */
2565 if (!symbol_reloading
)
2568 /* Some symbol formats have trouble providing file names... */
2569 if (name
== 0 || *name
== '\0')
2572 /* Look for a psymtab with the specified name. */
2575 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2577 if (STREQ (name
, ps
->filename
))
2579 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2580 goto again2
; /* Must restart, chain has been munged */
2584 /* Look for a symtab with the specified name. */
2586 for (s
= symtab_list
; s
; s
= s
->next
)
2588 if (STREQ (name
, s
->filename
))
2595 if (s
== symtab_list
)
2596 symtab_list
= s
->next
;
2598 prev
->next
= s
->next
;
2600 /* For now, queue a delete for all breakpoints, displays, etc., whether
2601 or not they depend on the symtab being freed. This should be
2602 changed so that only those data structures affected are deleted. */
2604 /* But don't delete anything if the symtab is empty.
2605 This test is necessary due to a bug in "dbxread.c" that
2606 causes empty symtabs to be created for N_SO symbols that
2607 contain the pathname of the object file. (This problem
2608 has been fixed in GDB 3.9x). */
2610 bv
= BLOCKVECTOR (s
);
2611 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2612 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2613 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2615 complaint (&symfile_complaints
, "Replacing old symbols for `%s'",
2617 clear_symtab_users_queued
++;
2618 make_cleanup (clear_symtab_users_once
, 0);
2623 complaint (&symfile_complaints
, "Empty symbol table found for `%s'",
2631 /* It is still possible that some breakpoints will be affected
2632 even though no symtab was found, since the file might have
2633 been compiled without debugging, and hence not be associated
2634 with a symtab. In order to handle this correctly, we would need
2635 to keep a list of text address ranges for undebuggable files.
2636 For now, we do nothing, since this is a fairly obscure case. */
2640 /* FIXME, what about the minimal symbol table? */
2647 /* Allocate and partially fill a partial symtab. It will be
2648 completely filled at the end of the symbol list.
2650 FILENAME is the name of the symbol-file we are reading from. */
2652 struct partial_symtab
*
2653 start_psymtab_common (struct objfile
*objfile
,
2654 struct section_offsets
*section_offsets
, char *filename
,
2655 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2656 struct partial_symbol
**static_syms
)
2658 struct partial_symtab
*psymtab
;
2660 psymtab
= allocate_psymtab (filename
, objfile
);
2661 psymtab
->section_offsets
= section_offsets
;
2662 psymtab
->textlow
= textlow
;
2663 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2664 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2665 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2669 /* Add a symbol with a long value to a psymtab.
2670 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2673 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2674 enum address_class
class,
2675 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2676 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2677 enum language language
, struct objfile
*objfile
)
2679 register struct partial_symbol
*psym
;
2680 char *buf
= alloca (namelength
+ 1);
2681 /* psymbol is static so that there will be no uninitialized gaps in the
2682 structure which might contain random data, causing cache misses in
2684 static struct partial_symbol psymbol
;
2686 /* Create local copy of the partial symbol */
2687 memcpy (buf
, name
, namelength
);
2688 buf
[namelength
] = '\0';
2689 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2692 SYMBOL_VALUE (&psymbol
) = val
;
2696 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2698 SYMBOL_SECTION (&psymbol
) = 0;
2699 SYMBOL_LANGUAGE (&psymbol
) = language
;
2700 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2701 PSYMBOL_CLASS (&psymbol
) = class;
2703 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2705 /* Stash the partial symbol away in the cache */
2706 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2708 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2709 if (list
->next
>= list
->list
+ list
->size
)
2711 extend_psymbol_list (list
, objfile
);
2713 *list
->next
++ = psym
;
2714 OBJSTAT (objfile
, n_psyms
++);
2717 /* Add a symbol with a long value to a psymtab. This differs from
2718 * add_psymbol_to_list above in taking both a mangled and a demangled
2722 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2723 int dem_namelength
, domain_enum domain
,
2724 enum address_class
class,
2725 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2726 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2727 enum language language
,
2728 struct objfile
*objfile
)
2730 register struct partial_symbol
*psym
;
2731 char *buf
= alloca (namelength
+ 1);
2732 /* psymbol is static so that there will be no uninitialized gaps in the
2733 structure which might contain random data, causing cache misses in
2735 static struct partial_symbol psymbol
;
2737 /* Create local copy of the partial symbol */
2739 memcpy (buf
, name
, namelength
);
2740 buf
[namelength
] = '\0';
2741 DEPRECATED_SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, objfile
->psymbol_cache
);
2743 buf
= alloca (dem_namelength
+ 1);
2744 memcpy (buf
, dem_name
, dem_namelength
);
2745 buf
[dem_namelength
] = '\0';
2750 case language_cplus
:
2751 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2752 bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2754 /* FIXME What should be done for the default case? Ignoring for now. */
2757 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2760 SYMBOL_VALUE (&psymbol
) = val
;
2764 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2766 SYMBOL_SECTION (&psymbol
) = 0;
2767 SYMBOL_LANGUAGE (&psymbol
) = language
;
2768 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2769 PSYMBOL_CLASS (&psymbol
) = class;
2770 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2772 /* Stash the partial symbol away in the cache */
2773 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), objfile
->psymbol_cache
);
2775 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2776 if (list
->next
>= list
->list
+ list
->size
)
2778 extend_psymbol_list (list
, objfile
);
2780 *list
->next
++ = psym
;
2781 OBJSTAT (objfile
, n_psyms
++);
2784 /* Initialize storage for partial symbols. */
2787 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2789 /* Free any previously allocated psymbol lists. */
2791 if (objfile
->global_psymbols
.list
)
2793 xmfree (objfile
->md
, objfile
->global_psymbols
.list
);
2795 if (objfile
->static_psymbols
.list
)
2797 xmfree (objfile
->md
, objfile
->static_psymbols
.list
);
2800 /* Current best guess is that approximately a twentieth
2801 of the total symbols (in a debugging file) are global or static
2804 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2805 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2807 if (objfile
->global_psymbols
.size
> 0)
2809 objfile
->global_psymbols
.next
=
2810 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2811 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2812 * sizeof (struct partial_symbol
*)));
2814 if (objfile
->static_psymbols
.size
> 0)
2816 objfile
->static_psymbols
.next
=
2817 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2818 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2819 * sizeof (struct partial_symbol
*)));
2824 The following code implements an abstraction for debugging overlay sections.
2826 The target model is as follows:
2827 1) The gnu linker will permit multiple sections to be mapped into the
2828 same VMA, each with its own unique LMA (or load address).
2829 2) It is assumed that some runtime mechanism exists for mapping the
2830 sections, one by one, from the load address into the VMA address.
2831 3) This code provides a mechanism for gdb to keep track of which
2832 sections should be considered to be mapped from the VMA to the LMA.
2833 This information is used for symbol lookup, and memory read/write.
2834 For instance, if a section has been mapped then its contents
2835 should be read from the VMA, otherwise from the LMA.
2837 Two levels of debugger support for overlays are available. One is
2838 "manual", in which the debugger relies on the user to tell it which
2839 overlays are currently mapped. This level of support is
2840 implemented entirely in the core debugger, and the information about
2841 whether a section is mapped is kept in the objfile->obj_section table.
2843 The second level of support is "automatic", and is only available if
2844 the target-specific code provides functionality to read the target's
2845 overlay mapping table, and translate its contents for the debugger
2846 (by updating the mapped state information in the obj_section tables).
2848 The interface is as follows:
2850 overlay map <name> -- tell gdb to consider this section mapped
2851 overlay unmap <name> -- tell gdb to consider this section unmapped
2852 overlay list -- list the sections that GDB thinks are mapped
2853 overlay read-target -- get the target's state of what's mapped
2854 overlay off/manual/auto -- set overlay debugging state
2855 Functional interface:
2856 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2857 section, return that section.
2858 find_pc_overlay(pc): find any overlay section that contains
2859 the pc, either in its VMA or its LMA
2860 overlay_is_mapped(sect): true if overlay is marked as mapped
2861 section_is_overlay(sect): true if section's VMA != LMA
2862 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2863 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2864 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2865 overlay_mapped_address(...): map an address from section's LMA to VMA
2866 overlay_unmapped_address(...): map an address from section's VMA to LMA
2867 symbol_overlayed_address(...): Return a "current" address for symbol:
2868 either in VMA or LMA depending on whether
2869 the symbol's section is currently mapped
2872 /* Overlay debugging state: */
2874 enum overlay_debugging_state overlay_debugging
= ovly_off
;
2875 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2877 /* Target vector for refreshing overlay mapped state */
2878 static void simple_overlay_update (struct obj_section
*);
2879 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
2881 /* Function: section_is_overlay (SECTION)
2882 Returns true if SECTION has VMA not equal to LMA, ie.
2883 SECTION is loaded at an address different from where it will "run". */
2886 section_is_overlay (asection
*section
)
2888 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2890 if (overlay_debugging
)
2891 if (section
&& section
->lma
!= 0 &&
2892 section
->vma
!= section
->lma
)
2898 /* Function: overlay_invalidate_all (void)
2899 Invalidate the mapped state of all overlay sections (mark it as stale). */
2902 overlay_invalidate_all (void)
2904 struct objfile
*objfile
;
2905 struct obj_section
*sect
;
2907 ALL_OBJSECTIONS (objfile
, sect
)
2908 if (section_is_overlay (sect
->the_bfd_section
))
2909 sect
->ovly_mapped
= -1;
2912 /* Function: overlay_is_mapped (SECTION)
2913 Returns true if section is an overlay, and is currently mapped.
2914 Private: public access is thru function section_is_mapped.
2916 Access to the ovly_mapped flag is restricted to this function, so
2917 that we can do automatic update. If the global flag
2918 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2919 overlay_invalidate_all. If the mapped state of the particular
2920 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2923 overlay_is_mapped (struct obj_section
*osect
)
2925 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2928 switch (overlay_debugging
)
2932 return 0; /* overlay debugging off */
2933 case ovly_auto
: /* overlay debugging automatic */
2934 /* Unles there is a target_overlay_update function,
2935 there's really nothing useful to do here (can't really go auto) */
2936 if (target_overlay_update
)
2938 if (overlay_cache_invalid
)
2940 overlay_invalidate_all ();
2941 overlay_cache_invalid
= 0;
2943 if (osect
->ovly_mapped
== -1)
2944 (*target_overlay_update
) (osect
);
2946 /* fall thru to manual case */
2947 case ovly_on
: /* overlay debugging manual */
2948 return osect
->ovly_mapped
== 1;
2952 /* Function: section_is_mapped
2953 Returns true if section is an overlay, and is currently mapped. */
2956 section_is_mapped (asection
*section
)
2958 struct objfile
*objfile
;
2959 struct obj_section
*osect
;
2961 if (overlay_debugging
)
2962 if (section
&& section_is_overlay (section
))
2963 ALL_OBJSECTIONS (objfile
, osect
)
2964 if (osect
->the_bfd_section
== section
)
2965 return overlay_is_mapped (osect
);
2970 /* Function: pc_in_unmapped_range
2971 If PC falls into the lma range of SECTION, return true, else false. */
2974 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
2976 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2980 if (overlay_debugging
)
2981 if (section
&& section_is_overlay (section
))
2983 size
= bfd_get_section_size_before_reloc (section
);
2984 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2990 /* Function: pc_in_mapped_range
2991 If PC falls into the vma range of SECTION, return true, else false. */
2994 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
2996 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3000 if (overlay_debugging
)
3001 if (section
&& section_is_overlay (section
))
3003 size
= bfd_get_section_size_before_reloc (section
);
3004 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
3011 /* Return true if the mapped ranges of sections A and B overlap, false
3014 sections_overlap (asection
*a
, asection
*b
)
3016 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3018 CORE_ADDR a_start
= a
->vma
;
3019 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size_before_reloc (a
);
3020 CORE_ADDR b_start
= b
->vma
;
3021 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size_before_reloc (b
);
3023 return (a_start
< b_end
&& b_start
< a_end
);
3026 /* Function: overlay_unmapped_address (PC, SECTION)
3027 Returns the address corresponding to PC in the unmapped (load) range.
3028 May be the same as PC. */
3031 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3033 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3035 if (overlay_debugging
)
3036 if (section
&& section_is_overlay (section
) &&
3037 pc_in_mapped_range (pc
, section
))
3038 return pc
+ section
->lma
- section
->vma
;
3043 /* Function: overlay_mapped_address (PC, SECTION)
3044 Returns the address corresponding to PC in the mapped (runtime) range.
3045 May be the same as PC. */
3048 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3050 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3052 if (overlay_debugging
)
3053 if (section
&& section_is_overlay (section
) &&
3054 pc_in_unmapped_range (pc
, section
))
3055 return pc
+ section
->vma
- section
->lma
;
3061 /* Function: symbol_overlayed_address
3062 Return one of two addresses (relative to the VMA or to the LMA),
3063 depending on whether the section is mapped or not. */
3066 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3068 if (overlay_debugging
)
3070 /* If the symbol has no section, just return its regular address. */
3073 /* If the symbol's section is not an overlay, just return its address */
3074 if (!section_is_overlay (section
))
3076 /* If the symbol's section is mapped, just return its address */
3077 if (section_is_mapped (section
))
3080 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3081 * then return its LOADED address rather than its vma address!!
3083 return overlay_unmapped_address (address
, section
);
3088 /* Function: find_pc_overlay (PC)
3089 Return the best-match overlay section for PC:
3090 If PC matches a mapped overlay section's VMA, return that section.
3091 Else if PC matches an unmapped section's VMA, return that section.
3092 Else if PC matches an unmapped section's LMA, return that section. */
3095 find_pc_overlay (CORE_ADDR pc
)
3097 struct objfile
*objfile
;
3098 struct obj_section
*osect
, *best_match
= NULL
;
3100 if (overlay_debugging
)
3101 ALL_OBJSECTIONS (objfile
, osect
)
3102 if (section_is_overlay (osect
->the_bfd_section
))
3104 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3106 if (overlay_is_mapped (osect
))
3107 return osect
->the_bfd_section
;
3111 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3114 return best_match
? best_match
->the_bfd_section
: NULL
;
3117 /* Function: find_pc_mapped_section (PC)
3118 If PC falls into the VMA address range of an overlay section that is
3119 currently marked as MAPPED, return that section. Else return NULL. */
3122 find_pc_mapped_section (CORE_ADDR pc
)
3124 struct objfile
*objfile
;
3125 struct obj_section
*osect
;
3127 if (overlay_debugging
)
3128 ALL_OBJSECTIONS (objfile
, osect
)
3129 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3130 overlay_is_mapped (osect
))
3131 return osect
->the_bfd_section
;
3136 /* Function: list_overlays_command
3137 Print a list of mapped sections and their PC ranges */
3140 list_overlays_command (char *args
, int from_tty
)
3143 struct objfile
*objfile
;
3144 struct obj_section
*osect
;
3146 if (overlay_debugging
)
3147 ALL_OBJSECTIONS (objfile
, osect
)
3148 if (overlay_is_mapped (osect
))
3154 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3155 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3156 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3157 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3159 printf_filtered ("Section %s, loaded at ", name
);
3160 print_address_numeric (lma
, 1, gdb_stdout
);
3161 puts_filtered (" - ");
3162 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3163 printf_filtered (", mapped at ");
3164 print_address_numeric (vma
, 1, gdb_stdout
);
3165 puts_filtered (" - ");
3166 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3167 puts_filtered ("\n");
3172 printf_filtered ("No sections are mapped.\n");
3175 /* Function: map_overlay_command
3176 Mark the named section as mapped (ie. residing at its VMA address). */
3179 map_overlay_command (char *args
, int from_tty
)
3181 struct objfile
*objfile
, *objfile2
;
3182 struct obj_section
*sec
, *sec2
;
3185 if (!overlay_debugging
)
3187 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3188 the 'overlay manual' command.");
3190 if (args
== 0 || *args
== 0)
3191 error ("Argument required: name of an overlay section");
3193 /* First, find a section matching the user supplied argument */
3194 ALL_OBJSECTIONS (objfile
, sec
)
3195 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3197 /* Now, check to see if the section is an overlay. */
3198 bfdsec
= sec
->the_bfd_section
;
3199 if (!section_is_overlay (bfdsec
))
3200 continue; /* not an overlay section */
3202 /* Mark the overlay as "mapped" */
3203 sec
->ovly_mapped
= 1;
3205 /* Next, make a pass and unmap any sections that are
3206 overlapped by this new section: */
3207 ALL_OBJSECTIONS (objfile2
, sec2
)
3208 if (sec2
->ovly_mapped
3210 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3211 && sections_overlap (sec
->the_bfd_section
,
3212 sec2
->the_bfd_section
))
3215 printf_filtered ("Note: section %s unmapped by overlap\n",
3216 bfd_section_name (objfile
->obfd
,
3217 sec2
->the_bfd_section
));
3218 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3222 error ("No overlay section called %s", args
);
3225 /* Function: unmap_overlay_command
3226 Mark the overlay section as unmapped
3227 (ie. resident in its LMA address range, rather than the VMA range). */
3230 unmap_overlay_command (char *args
, int from_tty
)
3232 struct objfile
*objfile
;
3233 struct obj_section
*sec
;
3235 if (!overlay_debugging
)
3237 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3238 the 'overlay manual' command.");
3240 if (args
== 0 || *args
== 0)
3241 error ("Argument required: name of an overlay section");
3243 /* First, find a section matching the user supplied argument */
3244 ALL_OBJSECTIONS (objfile
, sec
)
3245 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3247 if (!sec
->ovly_mapped
)
3248 error ("Section %s is not mapped", args
);
3249 sec
->ovly_mapped
= 0;
3252 error ("No overlay section called %s", args
);
3255 /* Function: overlay_auto_command
3256 A utility command to turn on overlay debugging.
3257 Possibly this should be done via a set/show command. */
3260 overlay_auto_command (char *args
, int from_tty
)
3262 overlay_debugging
= ovly_auto
;
3263 enable_overlay_breakpoints ();
3265 printf_filtered ("Automatic overlay debugging enabled.");
3268 /* Function: overlay_manual_command
3269 A utility command to turn on overlay debugging.
3270 Possibly this should be done via a set/show command. */
3273 overlay_manual_command (char *args
, int from_tty
)
3275 overlay_debugging
= ovly_on
;
3276 disable_overlay_breakpoints ();
3278 printf_filtered ("Overlay debugging enabled.");
3281 /* Function: overlay_off_command
3282 A utility command to turn on overlay debugging.
3283 Possibly this should be done via a set/show command. */
3286 overlay_off_command (char *args
, int from_tty
)
3288 overlay_debugging
= ovly_off
;
3289 disable_overlay_breakpoints ();
3291 printf_filtered ("Overlay debugging disabled.");
3295 overlay_load_command (char *args
, int from_tty
)
3297 if (target_overlay_update
)
3298 (*target_overlay_update
) (NULL
);
3300 error ("This target does not know how to read its overlay state.");
3303 /* Function: overlay_command
3304 A place-holder for a mis-typed command */
3306 /* Command list chain containing all defined "overlay" subcommands. */
3307 struct cmd_list_element
*overlaylist
;
3310 overlay_command (char *args
, int from_tty
)
3313 ("\"overlay\" must be followed by the name of an overlay command.\n");
3314 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3318 /* Target Overlays for the "Simplest" overlay manager:
3320 This is GDB's default target overlay layer. It works with the
3321 minimal overlay manager supplied as an example by Cygnus. The
3322 entry point is via a function pointer "target_overlay_update",
3323 so targets that use a different runtime overlay manager can
3324 substitute their own overlay_update function and take over the
3327 The overlay_update function pokes around in the target's data structures
3328 to see what overlays are mapped, and updates GDB's overlay mapping with
3331 In this simple implementation, the target data structures are as follows:
3332 unsigned _novlys; /# number of overlay sections #/
3333 unsigned _ovly_table[_novlys][4] = {
3334 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3335 {..., ..., ..., ...},
3337 unsigned _novly_regions; /# number of overlay regions #/
3338 unsigned _ovly_region_table[_novly_regions][3] = {
3339 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3342 These functions will attempt to update GDB's mappedness state in the
3343 symbol section table, based on the target's mappedness state.
3345 To do this, we keep a cached copy of the target's _ovly_table, and
3346 attempt to detect when the cached copy is invalidated. The main
3347 entry point is "simple_overlay_update(SECT), which looks up SECT in
3348 the cached table and re-reads only the entry for that section from
3349 the target (whenever possible).
3352 /* Cached, dynamically allocated copies of the target data structures: */
3353 static unsigned (*cache_ovly_table
)[4] = 0;
3355 static unsigned (*cache_ovly_region_table
)[3] = 0;
3357 static unsigned cache_novlys
= 0;
3359 static unsigned cache_novly_regions
= 0;
3361 static CORE_ADDR cache_ovly_table_base
= 0;
3363 static CORE_ADDR cache_ovly_region_table_base
= 0;
3367 VMA
, SIZE
, LMA
, MAPPED
3369 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3371 /* Throw away the cached copy of _ovly_table */
3373 simple_free_overlay_table (void)
3375 if (cache_ovly_table
)
3376 xfree (cache_ovly_table
);
3378 cache_ovly_table
= NULL
;
3379 cache_ovly_table_base
= 0;
3383 /* Throw away the cached copy of _ovly_region_table */
3385 simple_free_overlay_region_table (void)
3387 if (cache_ovly_region_table
)
3388 xfree (cache_ovly_region_table
);
3389 cache_novly_regions
= 0;
3390 cache_ovly_region_table
= NULL
;
3391 cache_ovly_region_table_base
= 0;
3395 /* Read an array of ints from the target into a local buffer.
3396 Convert to host order. int LEN is number of ints */
3398 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3400 /* FIXME (alloca): Not safe if array is very large. */
3401 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3404 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3405 for (i
= 0; i
< len
; i
++)
3406 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3410 /* Find and grab a copy of the target _ovly_table
3411 (and _novlys, which is needed for the table's size) */
3413 simple_read_overlay_table (void)
3415 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3417 simple_free_overlay_table ();
3418 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3421 error ("Error reading inferior's overlay table: "
3422 "couldn't find `_novlys' variable\n"
3423 "in inferior. Use `overlay manual' mode.");
3427 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3428 if (! ovly_table_msym
)
3430 error ("Error reading inferior's overlay table: couldn't find "
3431 "`_ovly_table' array\n"
3432 "in inferior. Use `overlay manual' mode.");
3436 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3438 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3439 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3440 read_target_long_array (cache_ovly_table_base
,
3441 (int *) cache_ovly_table
,
3444 return 1; /* SUCCESS */
3448 /* Find and grab a copy of the target _ovly_region_table
3449 (and _novly_regions, which is needed for the table's size) */
3451 simple_read_overlay_region_table (void)
3453 struct minimal_symbol
*msym
;
3455 simple_free_overlay_region_table ();
3456 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3458 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3460 return 0; /* failure */
3461 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3462 if (cache_ovly_region_table
!= NULL
)
3464 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3467 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3468 read_target_long_array (cache_ovly_region_table_base
,
3469 (int *) cache_ovly_region_table
,
3470 cache_novly_regions
* 3);
3473 return 0; /* failure */
3476 return 0; /* failure */
3477 return 1; /* SUCCESS */
3481 /* Function: simple_overlay_update_1
3482 A helper function for simple_overlay_update. Assuming a cached copy
3483 of _ovly_table exists, look through it to find an entry whose vma,
3484 lma and size match those of OSECT. Re-read the entry and make sure
3485 it still matches OSECT (else the table may no longer be valid).
3486 Set OSECT's mapped state to match the entry. Return: 1 for
3487 success, 0 for failure. */
3490 simple_overlay_update_1 (struct obj_section
*osect
)
3493 bfd
*obfd
= osect
->objfile
->obfd
;
3494 asection
*bsect
= osect
->the_bfd_section
;
3496 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3497 for (i
= 0; i
< cache_novlys
; i
++)
3498 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3499 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3500 /* && cache_ovly_table[i][SIZE] == size */ )
3502 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3503 (int *) cache_ovly_table
[i
], 4);
3504 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3505 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3506 /* && cache_ovly_table[i][SIZE] == size */ )
3508 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3511 else /* Warning! Warning! Target's ovly table has changed! */
3517 /* Function: simple_overlay_update
3518 If OSECT is NULL, then update all sections' mapped state
3519 (after re-reading the entire target _ovly_table).
3520 If OSECT is non-NULL, then try to find a matching entry in the
3521 cached ovly_table and update only OSECT's mapped state.
3522 If a cached entry can't be found or the cache isn't valid, then
3523 re-read the entire cache, and go ahead and update all sections. */
3526 simple_overlay_update (struct obj_section
*osect
)
3528 struct objfile
*objfile
;
3530 /* Were we given an osect to look up? NULL means do all of them. */
3532 /* Have we got a cached copy of the target's overlay table? */
3533 if (cache_ovly_table
!= NULL
)
3534 /* Does its cached location match what's currently in the symtab? */
3535 if (cache_ovly_table_base
==
3536 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3537 /* Then go ahead and try to look up this single section in the cache */
3538 if (simple_overlay_update_1 (osect
))
3539 /* Found it! We're done. */
3542 /* Cached table no good: need to read the entire table anew.
3543 Or else we want all the sections, in which case it's actually
3544 more efficient to read the whole table in one block anyway. */
3546 if (! simple_read_overlay_table ())
3549 /* Now may as well update all sections, even if only one was requested. */
3550 ALL_OBJSECTIONS (objfile
, osect
)
3551 if (section_is_overlay (osect
->the_bfd_section
))
3554 bfd
*obfd
= osect
->objfile
->obfd
;
3555 asection
*bsect
= osect
->the_bfd_section
;
3557 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3558 for (i
= 0; i
< cache_novlys
; i
++)
3559 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3560 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3561 /* && cache_ovly_table[i][SIZE] == size */ )
3562 { /* obj_section matches i'th entry in ovly_table */
3563 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3564 break; /* finished with inner for loop: break out */
3569 /* Set the output sections and output offsets for section SECTP in
3570 ABFD. The relocation code in BFD will read these offsets, so we
3571 need to be sure they're initialized. We map each section to itself,
3572 with no offset; this means that SECTP->vma will be honored. */
3575 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3577 sectp
->output_section
= sectp
;
3578 sectp
->output_offset
= 0;
3581 /* Relocate the contents of a debug section SECTP in ABFD. The
3582 contents are stored in BUF if it is non-NULL, or returned in a
3583 malloc'd buffer otherwise.
3585 For some platforms and debug info formats, shared libraries contain
3586 relocations against the debug sections (particularly for DWARF-2;
3587 one affected platform is PowerPC GNU/Linux, although it depends on
3588 the version of the linker in use). Also, ELF object files naturally
3589 have unresolved relocations for their debug sections. We need to apply
3590 the relocations in order to get the locations of symbols correct. */
3593 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3595 /* We're only interested in debugging sections with relocation
3597 if ((sectp
->flags
& SEC_RELOC
) == 0)
3599 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3602 /* We will handle section offsets properly elsewhere, so relocate as if
3603 all sections begin at 0. */
3604 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3606 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3610 _initialize_symfile (void)
3612 struct cmd_list_element
*c
;
3614 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3615 "Load symbol table from executable file FILE.\n\
3616 The `file' command can also load symbol tables, as well as setting the file\n\
3617 to execute.", &cmdlist
);
3618 set_cmd_completer (c
, filename_completer
);
3620 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3621 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3622 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3623 ADDR is the starting address of the file's text.\n\
3624 The optional arguments are section-name section-address pairs and\n\
3625 should be specified if the data and bss segments are not contiguous\n\
3626 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3628 set_cmd_completer (c
, filename_completer
);
3630 c
= add_cmd ("add-shared-symbol-files", class_files
,
3631 add_shared_symbol_files_command
,
3632 "Load the symbols from shared objects in the dynamic linker's link map.",
3634 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3637 c
= add_cmd ("load", class_files
, load_command
,
3638 "Dynamically load FILE into the running program, and record its symbols\n\
3639 for access from GDB.", &cmdlist
);
3640 set_cmd_completer (c
, filename_completer
);
3643 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3644 (char *) &symbol_reloading
,
3645 "Set dynamic symbol table reloading multiple times in one run.",
3649 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3650 "Commands for debugging overlays.", &overlaylist
,
3651 "overlay ", 0, &cmdlist
);
3653 add_com_alias ("ovly", "overlay", class_alias
, 1);
3654 add_com_alias ("ov", "overlay", class_alias
, 1);
3656 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3657 "Assert that an overlay section is mapped.", &overlaylist
);
3659 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3660 "Assert that an overlay section is unmapped.", &overlaylist
);
3662 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3663 "List mappings of overlay sections.", &overlaylist
);
3665 add_cmd ("manual", class_support
, overlay_manual_command
,
3666 "Enable overlay debugging.", &overlaylist
);
3667 add_cmd ("off", class_support
, overlay_off_command
,
3668 "Disable overlay debugging.", &overlaylist
);
3669 add_cmd ("auto", class_support
, overlay_auto_command
,
3670 "Enable automatic overlay debugging.", &overlaylist
);
3671 add_cmd ("load-target", class_support
, overlay_load_command
,
3672 "Read the overlay mapping state from the target.", &overlaylist
);
3674 /* Filename extension to source language lookup table: */
3675 init_filename_language_table ();
3676 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3678 "Set mapping between filename extension and source language.\n\
3679 Usage: set extension-language .foo bar",
3681 set_cmd_cfunc (c
, set_ext_lang_command
);
3683 add_info ("extensions", info_ext_lang_command
,
3684 "All filename extensions associated with a source language.");
3687 (add_set_cmd ("download-write-size", class_obscure
,
3688 var_integer
, (char *) &download_write_size
,
3689 "Set the write size used when downloading a program.\n"
3690 "Only used when downloading a program onto a remote\n"
3691 "target. Specify zero, or a negative value, to disable\n"
3692 "blocked writes. The actual size of each transfer is also\n"
3693 "limited by the size of the target packet and the memory\n"
3698 debug_file_directory
= xstrdup (DEBUGDIR
);
3700 ("debug-file-directory", class_support
, var_string
,
3701 (char *) &debug_file_directory
,
3702 "Set the directory where separate debug symbols are searched for.\n"
3703 "Separate debug symbols are first searched for in the same\n"
3704 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3706 "and lastly at the path of the directory of the binary with\n"
3707 "the global debug-file directory prepended\n",
3709 add_show_from_set (c
, &showlist
);
3710 set_cmd_completer (c
, filename_completer
);