1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software
23 Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 Boston, MA 02110-1301, USA. */
38 #include "breakpoint.h"
40 #include "complaints.h"
42 #include "inferior.h" /* for write_pc */
43 #include "filenames.h" /* for DOSish file names */
44 #include "gdb-stabs.h"
45 #include "gdb_obstack.h"
46 #include "completer.h"
49 #include "readline/readline.h"
50 #include "gdb_assert.h"
54 #include "parser-defs.h"
57 #include <sys/types.h>
59 #include "gdb_string.h"
66 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
67 void (*deprecated_show_load_progress
) (const char *section
,
68 unsigned long section_sent
,
69 unsigned long section_size
,
70 unsigned long total_sent
,
71 unsigned long total_size
);
72 void (*deprecated_pre_add_symbol_hook
) (const char *);
73 void (*deprecated_post_add_symbol_hook
) (void);
74 void (*deprecated_target_new_objfile_hook
) (struct objfile
*);
76 static void clear_symtab_users_cleanup (void *ignore
);
78 /* Global variables owned by this file */
79 int readnow_symbol_files
; /* Read full symbols immediately */
81 /* External variables and functions referenced. */
83 extern void report_transfer_performance (unsigned long, time_t, time_t);
85 /* Functions this file defines */
88 static int simple_read_overlay_region_table (void);
89 static void simple_free_overlay_region_table (void);
92 static void set_initial_language (void);
94 static void load_command (char *, int);
96 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
98 static void add_symbol_file_command (char *, int);
100 static void add_shared_symbol_files_command (char *, int);
102 static void reread_separate_symbols (struct objfile
*objfile
);
104 static void cashier_psymtab (struct partial_symtab
*);
106 bfd
*symfile_bfd_open (char *);
108 int get_section_index (struct objfile
*, char *);
110 static void find_sym_fns (struct objfile
*);
112 static void decrement_reading_symtab (void *);
114 static void overlay_invalidate_all (void);
116 static int overlay_is_mapped (struct obj_section
*);
118 void list_overlays_command (char *, int);
120 void map_overlay_command (char *, int);
122 void unmap_overlay_command (char *, int);
124 static void overlay_auto_command (char *, int);
126 static void overlay_manual_command (char *, int);
128 static void overlay_off_command (char *, int);
130 static void overlay_load_command (char *, int);
132 static void overlay_command (char *, int);
134 static void simple_free_overlay_table (void);
136 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
138 static int simple_read_overlay_table (void);
140 static int simple_overlay_update_1 (struct obj_section
*);
142 static void add_filename_language (char *ext
, enum language lang
);
144 static void info_ext_lang_command (char *args
, int from_tty
);
146 static char *find_separate_debug_file (struct objfile
*objfile
);
148 static void init_filename_language_table (void);
150 void _initialize_symfile (void);
152 /* List of all available sym_fns. On gdb startup, each object file reader
153 calls add_symtab_fns() to register information on each format it is
156 static struct sym_fns
*symtab_fns
= NULL
;
158 /* Flag for whether user will be reloading symbols multiple times.
159 Defaults to ON for VxWorks, otherwise OFF. */
161 #ifdef SYMBOL_RELOADING_DEFAULT
162 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
164 int symbol_reloading
= 0;
167 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
168 struct cmd_list_element
*c
, const char *value
)
170 fprintf_filtered (file
, _("\
171 Dynamic symbol table reloading multiple times in one run is %s.\n"),
176 /* If non-zero, shared library symbols will be added automatically
177 when the inferior is created, new libraries are loaded, or when
178 attaching to the inferior. This is almost always what users will
179 want to have happen; but for very large programs, the startup time
180 will be excessive, and so if this is a problem, the user can clear
181 this flag and then add the shared library symbols as needed. Note
182 that there is a potential for confusion, since if the shared
183 library symbols are not loaded, commands like "info fun" will *not*
184 report all the functions that are actually present. */
186 int auto_solib_add
= 1;
188 /* For systems that support it, a threshold size in megabytes. If
189 automatically adding a new library's symbol table to those already
190 known to the debugger would cause the total shared library symbol
191 size to exceed this threshhold, then the shlib's symbols are not
192 added. The threshold is ignored if the user explicitly asks for a
193 shlib to be added, such as when using the "sharedlibrary"
196 int auto_solib_limit
;
199 /* This compares two partial symbols by names, using strcmp_iw_ordered
200 for the comparison. */
203 compare_psymbols (const void *s1p
, const void *s2p
)
205 struct partial_symbol
*const *s1
= s1p
;
206 struct partial_symbol
*const *s2
= s2p
;
208 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
209 SYMBOL_SEARCH_NAME (*s2
));
213 sort_pst_symbols (struct partial_symtab
*pst
)
215 /* Sort the global list; don't sort the static list */
217 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
218 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
222 /* Make a null terminated copy of the string at PTR with SIZE characters in
223 the obstack pointed to by OBSTACKP . Returns the address of the copy.
224 Note that the string at PTR does not have to be null terminated, I.E. it
225 may be part of a larger string and we are only saving a substring. */
228 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
230 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
231 /* Open-coded memcpy--saves function call time. These strings are usually
232 short. FIXME: Is this really still true with a compiler that can
235 const char *p1
= ptr
;
237 const char *end
= ptr
+ size
;
245 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
246 in the obstack pointed to by OBSTACKP. */
249 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
252 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
253 char *val
= (char *) obstack_alloc (obstackp
, len
);
260 /* True if we are nested inside psymtab_to_symtab. */
262 int currently_reading_symtab
= 0;
265 decrement_reading_symtab (void *dummy
)
267 currently_reading_symtab
--;
270 /* Get the symbol table that corresponds to a partial_symtab.
271 This is fast after the first time you do it. In fact, there
272 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
276 psymtab_to_symtab (struct partial_symtab
*pst
)
278 /* If it's been looked up before, return it. */
282 /* If it has not yet been read in, read it. */
285 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
286 currently_reading_symtab
++;
287 (*pst
->read_symtab
) (pst
);
288 do_cleanups (back_to
);
294 /* Remember the lowest-addressed loadable section we've seen.
295 This function is called via bfd_map_over_sections.
297 In case of equal vmas, the section with the largest size becomes the
298 lowest-addressed loadable section.
300 If the vmas and sizes are equal, the last section is considered the
301 lowest-addressed loadable section. */
304 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
306 asection
**lowest
= (asection
**) obj
;
308 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
311 *lowest
= sect
; /* First loadable section */
312 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
313 *lowest
= sect
; /* A lower loadable section */
314 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
315 && (bfd_section_size (abfd
, (*lowest
))
316 <= bfd_section_size (abfd
, sect
)))
320 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
322 struct section_addr_info
*
323 alloc_section_addr_info (size_t num_sections
)
325 struct section_addr_info
*sap
;
328 size
= (sizeof (struct section_addr_info
)
329 + sizeof (struct other_sections
) * (num_sections
- 1));
330 sap
= (struct section_addr_info
*) xmalloc (size
);
331 memset (sap
, 0, size
);
332 sap
->num_sections
= num_sections
;
338 /* Return a freshly allocated copy of ADDRS. The section names, if
339 any, are also freshly allocated copies of those in ADDRS. */
340 struct section_addr_info
*
341 copy_section_addr_info (struct section_addr_info
*addrs
)
343 struct section_addr_info
*copy
344 = alloc_section_addr_info (addrs
->num_sections
);
347 copy
->num_sections
= addrs
->num_sections
;
348 for (i
= 0; i
< addrs
->num_sections
; i
++)
350 copy
->other
[i
].addr
= addrs
->other
[i
].addr
;
351 if (addrs
->other
[i
].name
)
352 copy
->other
[i
].name
= xstrdup (addrs
->other
[i
].name
);
354 copy
->other
[i
].name
= NULL
;
355 copy
->other
[i
].sectindex
= addrs
->other
[i
].sectindex
;
363 /* Build (allocate and populate) a section_addr_info struct from
364 an existing section table. */
366 extern struct section_addr_info
*
367 build_section_addr_info_from_section_table (const struct section_table
*start
,
368 const struct section_table
*end
)
370 struct section_addr_info
*sap
;
371 const struct section_table
*stp
;
374 sap
= alloc_section_addr_info (end
- start
);
376 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
378 if (bfd_get_section_flags (stp
->bfd
,
379 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
380 && oidx
< end
- start
)
382 sap
->other
[oidx
].addr
= stp
->addr
;
383 sap
->other
[oidx
].name
384 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
385 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
394 /* Free all memory allocated by build_section_addr_info_from_section_table. */
397 free_section_addr_info (struct section_addr_info
*sap
)
401 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
402 if (sap
->other
[idx
].name
)
403 xfree (sap
->other
[idx
].name
);
408 /* Initialize OBJFILE's sect_index_* members. */
410 init_objfile_sect_indices (struct objfile
*objfile
)
415 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
417 objfile
->sect_index_text
= sect
->index
;
419 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
421 objfile
->sect_index_data
= sect
->index
;
423 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
425 objfile
->sect_index_bss
= sect
->index
;
427 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
429 objfile
->sect_index_rodata
= sect
->index
;
431 /* This is where things get really weird... We MUST have valid
432 indices for the various sect_index_* members or gdb will abort.
433 So if for example, there is no ".text" section, we have to
434 accomodate that. Except when explicitly adding symbol files at
435 some address, section_offsets contains nothing but zeros, so it
436 doesn't matter which slot in section_offsets the individual
437 sect_index_* members index into. So if they are all zero, it is
438 safe to just point all the currently uninitialized indices to the
441 for (i
= 0; i
< objfile
->num_sections
; i
++)
443 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
448 if (i
== objfile
->num_sections
)
450 if (objfile
->sect_index_text
== -1)
451 objfile
->sect_index_text
= 0;
452 if (objfile
->sect_index_data
== -1)
453 objfile
->sect_index_data
= 0;
454 if (objfile
->sect_index_bss
== -1)
455 objfile
->sect_index_bss
= 0;
456 if (objfile
->sect_index_rodata
== -1)
457 objfile
->sect_index_rodata
= 0;
461 /* The arguments to place_section. */
463 struct place_section_arg
465 struct section_offsets
*offsets
;
469 /* Find a unique offset to use for loadable section SECT if
470 the user did not provide an offset. */
473 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
475 struct place_section_arg
*arg
= obj
;
476 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
478 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
480 /* We are only interested in loadable sections. */
481 if ((bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
) == 0)
484 /* If the user specified an offset, honor it. */
485 if (offsets
[sect
->index
] != 0)
488 /* Otherwise, let's try to find a place for the section. */
489 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
496 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
498 int indx
= cur_sec
->index
;
499 CORE_ADDR cur_offset
;
501 /* We don't need to compare against ourself. */
505 /* We can only conflict with loadable sections. */
506 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_LOAD
) == 0)
509 /* We do not expect this to happen; just ignore sections in a
510 relocatable file with an assigned VMA. */
511 if (bfd_section_vma (abfd
, cur_sec
) != 0)
514 /* If the section offset is 0, either the section has not been placed
515 yet, or it was the lowest section placed (in which case LOWEST
516 will be past its end). */
517 if (offsets
[indx
] == 0)
520 /* If this section would overlap us, then we must move up. */
521 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
522 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
524 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
525 start_addr
= (start_addr
+ align
- 1) & -align
;
530 /* Otherwise, we appear to be OK. So far. */
535 offsets
[sect
->index
] = start_addr
;
536 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
538 exec_set_section_address (bfd_get_filename (abfd
), sect
->index
, start_addr
);
541 /* Parse the user's idea of an offset for dynamic linking, into our idea
542 of how to represent it for fast symbol reading. This is the default
543 version of the sym_fns.sym_offsets function for symbol readers that
544 don't need to do anything special. It allocates a section_offsets table
545 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
548 default_symfile_offsets (struct objfile
*objfile
,
549 struct section_addr_info
*addrs
)
553 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
554 objfile
->section_offsets
= (struct section_offsets
*)
555 obstack_alloc (&objfile
->objfile_obstack
,
556 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
557 memset (objfile
->section_offsets
, 0,
558 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
560 /* Now calculate offsets for section that were specified by the
562 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
564 struct other_sections
*osp
;
566 osp
= &addrs
->other
[i
] ;
570 /* Record all sections in offsets */
571 /* The section_offsets in the objfile are here filled in using
573 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
576 /* For relocatable files, all loadable sections will start at zero.
577 The zero is meaningless, so try to pick arbitrary addresses such
578 that no loadable sections overlap. This algorithm is quadratic,
579 but the number of sections in a single object file is generally
581 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
583 struct place_section_arg arg
;
584 arg
.offsets
= objfile
->section_offsets
;
586 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
589 /* Remember the bfd indexes for the .text, .data, .bss and
591 init_objfile_sect_indices (objfile
);
595 /* Process a symbol file, as either the main file or as a dynamically
598 OBJFILE is where the symbols are to be read from.
600 ADDRS is the list of section load addresses. If the user has given
601 an 'add-symbol-file' command, then this is the list of offsets and
602 addresses he or she provided as arguments to the command; or, if
603 we're handling a shared library, these are the actual addresses the
604 sections are loaded at, according to the inferior's dynamic linker
605 (as gleaned by GDB's shared library code). We convert each address
606 into an offset from the section VMA's as it appears in the object
607 file, and then call the file's sym_offsets function to convert this
608 into a format-specific offset table --- a `struct section_offsets'.
609 If ADDRS is non-zero, OFFSETS must be zero.
611 OFFSETS is a table of section offsets already in the right
612 format-specific representation. NUM_OFFSETS is the number of
613 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
614 assume this is the proper table the call to sym_offsets described
615 above would produce. Instead of calling sym_offsets, we just dump
616 it right into objfile->section_offsets. (When we're re-reading
617 symbols from an objfile, we don't have the original load address
618 list any more; all we have is the section offset table.) If
619 OFFSETS is non-zero, ADDRS must be zero.
621 MAINLINE is nonzero if this is the main symbol file, or zero if
622 it's an extra symbol file such as dynamically loaded code.
624 VERBO is nonzero if the caller has printed a verbose message about
625 the symbol reading (and complaints can be more terse about it). */
628 syms_from_objfile (struct objfile
*objfile
,
629 struct section_addr_info
*addrs
,
630 struct section_offsets
*offsets
,
635 struct section_addr_info
*local_addr
= NULL
;
636 struct cleanup
*old_chain
;
638 gdb_assert (! (addrs
&& offsets
));
640 init_entry_point_info (objfile
);
641 find_sym_fns (objfile
);
643 if (objfile
->sf
== NULL
)
644 return; /* No symbols. */
646 /* Make sure that partially constructed symbol tables will be cleaned up
647 if an error occurs during symbol reading. */
648 old_chain
= make_cleanup_free_objfile (objfile
);
650 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
651 list. We now establish the convention that an addr of zero means
652 no load address was specified. */
653 if (! addrs
&& ! offsets
)
656 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
657 make_cleanup (xfree
, local_addr
);
661 /* Now either addrs or offsets is non-zero. */
665 /* We will modify the main symbol table, make sure that all its users
666 will be cleaned up if an error occurs during symbol reading. */
667 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
669 /* Since no error yet, throw away the old symbol table. */
671 if (symfile_objfile
!= NULL
)
673 free_objfile (symfile_objfile
);
674 symfile_objfile
= NULL
;
677 /* Currently we keep symbols from the add-symbol-file command.
678 If the user wants to get rid of them, they should do "symbol-file"
679 without arguments first. Not sure this is the best behavior
682 (*objfile
->sf
->sym_new_init
) (objfile
);
685 /* Convert addr into an offset rather than an absolute address.
686 We find the lowest address of a loaded segment in the objfile,
687 and assume that <addr> is where that got loaded.
689 We no longer warn if the lowest section is not a text segment (as
690 happens for the PA64 port. */
691 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
693 asection
*lower_sect
;
695 CORE_ADDR lower_offset
;
698 /* Find lowest loadable section to be used as starting point for
699 continguous sections. FIXME!! won't work without call to find
700 .text first, but this assumes text is lowest section. */
701 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
702 if (lower_sect
== NULL
)
703 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
705 if (lower_sect
== NULL
)
706 warning (_("no loadable sections found in added symbol-file %s"),
709 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
710 warning (_("Lowest section in %s is %s at %s"),
712 bfd_section_name (objfile
->obfd
, lower_sect
),
713 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
714 if (lower_sect
!= NULL
)
715 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
719 /* Calculate offsets for the loadable sections.
720 FIXME! Sections must be in order of increasing loadable section
721 so that contiguous sections can use the lower-offset!!!
723 Adjust offsets if the segments are not contiguous.
724 If the section is contiguous, its offset should be set to
725 the offset of the highest loadable section lower than it
726 (the loadable section directly below it in memory).
727 this_offset = lower_offset = lower_addr - lower_orig_addr */
729 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
731 if (addrs
->other
[i
].addr
!= 0)
733 sect
= bfd_get_section_by_name (objfile
->obfd
,
734 addrs
->other
[i
].name
);
738 -= bfd_section_vma (objfile
->obfd
, sect
);
739 lower_offset
= addrs
->other
[i
].addr
;
740 /* This is the index used by BFD. */
741 addrs
->other
[i
].sectindex
= sect
->index
;
745 warning (_("section %s not found in %s"),
746 addrs
->other
[i
].name
,
748 addrs
->other
[i
].addr
= 0;
752 addrs
->other
[i
].addr
= lower_offset
;
756 /* Initialize symbol reading routines for this objfile, allow complaints to
757 appear for this new file, and record how verbose to be, then do the
758 initial symbol reading for this file. */
760 (*objfile
->sf
->sym_init
) (objfile
);
761 clear_complaints (&symfile_complaints
, 1, verbo
);
764 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
767 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
769 /* Just copy in the offset table directly as given to us. */
770 objfile
->num_sections
= num_offsets
;
771 objfile
->section_offsets
772 = ((struct section_offsets
*)
773 obstack_alloc (&objfile
->objfile_obstack
, size
));
774 memcpy (objfile
->section_offsets
, offsets
, size
);
776 init_objfile_sect_indices (objfile
);
779 #ifndef DEPRECATED_IBM6000_TARGET
780 /* This is a SVR4/SunOS specific hack, I think. In any event, it
781 screws RS/6000. sym_offsets should be doing this sort of thing,
782 because it knows the mapping between bfd sections and
784 /* This is a hack. As far as I can tell, section offsets are not
785 target dependent. They are all set to addr with a couple of
786 exceptions. The exceptions are sysvr4 shared libraries, whose
787 offsets are kept in solib structures anyway and rs6000 xcoff
788 which handles shared libraries in a completely unique way.
790 Section offsets are built similarly, except that they are built
791 by adding addr in all cases because there is no clear mapping
792 from section_offsets into actual sections. Note that solib.c
793 has a different algorithm for finding section offsets.
795 These should probably all be collapsed into some target
796 independent form of shared library support. FIXME. */
800 struct obj_section
*s
;
802 /* Map section offsets in "addr" back to the object's
803 sections by comparing the section names with bfd's
804 section names. Then adjust the section address by
805 the offset. */ /* for gdb/13815 */
807 ALL_OBJFILE_OSECTIONS (objfile
, s
)
809 CORE_ADDR s_addr
= 0;
813 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
815 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
817 addrs
->other
[i
].name
) == 0)
818 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
820 s
->addr
-= s
->offset
;
822 s
->endaddr
-= s
->offset
;
823 s
->endaddr
+= s_addr
;
827 #endif /* not DEPRECATED_IBM6000_TARGET */
829 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
831 /* Don't allow char * to have a typename (else would get caddr_t).
832 Ditto void *. FIXME: Check whether this is now done by all the
833 symbol readers themselves (many of them now do), and if so remove
836 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
837 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
839 /* Mark the objfile has having had initial symbol read attempted. Note
840 that this does not mean we found any symbols... */
842 objfile
->flags
|= OBJF_SYMS
;
844 /* Discard cleanups as symbol reading was successful. */
846 discard_cleanups (old_chain
);
849 /* Perform required actions after either reading in the initial
850 symbols for a new objfile, or mapping in the symbols from a reusable
854 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
857 /* If this is the main symbol file we have to clean up all users of the
858 old main symbol file. Otherwise it is sufficient to fixup all the
859 breakpoints that may have been redefined by this symbol file. */
862 /* OK, make it the "real" symbol file. */
863 symfile_objfile
= objfile
;
865 clear_symtab_users ();
869 breakpoint_re_set ();
872 /* We're done reading the symbol file; finish off complaints. */
873 clear_complaints (&symfile_complaints
, 0, verbo
);
876 /* Process a symbol file, as either the main file or as a dynamically
879 ABFD is a BFD already open on the file, as from symfile_bfd_open.
880 This BFD will be closed on error, and is always consumed by this function.
882 FROM_TTY says how verbose to be.
884 MAINLINE specifies whether this is the main symbol file, or whether
885 it's an extra symbol file such as dynamically loaded code.
887 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
888 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
891 Upon success, returns a pointer to the objfile that was added.
892 Upon failure, jumps back to command level (never returns). */
893 static struct objfile
*
894 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
, int from_tty
,
895 struct section_addr_info
*addrs
,
896 struct section_offsets
*offsets
,
898 int mainline
, int flags
)
900 struct objfile
*objfile
;
901 struct partial_symtab
*psymtab
;
903 struct section_addr_info
*orig_addrs
= NULL
;
904 struct cleanup
*my_cleanups
;
905 const char *name
= bfd_get_filename (abfd
);
907 my_cleanups
= make_cleanup_bfd_close (abfd
);
909 /* Give user a chance to burp if we'd be
910 interactively wiping out any existing symbols. */
912 if ((have_full_symbols () || have_partial_symbols ())
915 && !query ("Load new symbol table from \"%s\"? ", name
))
916 error (_("Not confirmed."));
918 objfile
= allocate_objfile (abfd
, flags
);
919 discard_cleanups (my_cleanups
);
923 orig_addrs
= copy_section_addr_info (addrs
);
924 make_cleanup_free_section_addr_info (orig_addrs
);
927 /* We either created a new mapped symbol table, mapped an existing
928 symbol table file which has not had initial symbol reading
929 performed, or need to read an unmapped symbol table. */
930 if (from_tty
|| info_verbose
)
932 if (deprecated_pre_add_symbol_hook
)
933 deprecated_pre_add_symbol_hook (name
);
936 printf_unfiltered (_("Reading symbols from %s..."), name
);
938 gdb_flush (gdb_stdout
);
941 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
944 /* We now have at least a partial symbol table. Check to see if the
945 user requested that all symbols be read on initial access via either
946 the gdb startup command line or on a per symbol file basis. Expand
947 all partial symbol tables for this objfile if so. */
949 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
951 if (from_tty
|| info_verbose
)
953 printf_unfiltered (_("expanding to full symbols..."));
955 gdb_flush (gdb_stdout
);
958 for (psymtab
= objfile
->psymtabs
;
960 psymtab
= psymtab
->next
)
962 psymtab_to_symtab (psymtab
);
966 debugfile
= find_separate_debug_file (objfile
);
971 objfile
->separate_debug_objfile
972 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
976 objfile
->separate_debug_objfile
977 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
979 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
982 /* Put the separate debug object before the normal one, this is so that
983 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
984 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
989 if (!have_partial_symbols () && !have_full_symbols ())
992 printf_filtered (_("(no debugging symbols found)"));
993 if (from_tty
|| info_verbose
)
994 printf_filtered ("...");
996 printf_filtered ("\n");
1000 if (from_tty
|| info_verbose
)
1002 if (deprecated_post_add_symbol_hook
)
1003 deprecated_post_add_symbol_hook ();
1006 printf_unfiltered (_("done.\n"));
1010 /* We print some messages regardless of whether 'from_tty ||
1011 info_verbose' is true, so make sure they go out at the right
1013 gdb_flush (gdb_stdout
);
1015 do_cleanups (my_cleanups
);
1017 if (objfile
->sf
== NULL
)
1018 return objfile
; /* No symbols. */
1020 new_symfile_objfile (objfile
, mainline
, from_tty
);
1022 if (deprecated_target_new_objfile_hook
)
1023 deprecated_target_new_objfile_hook (objfile
);
1025 bfd_cache_close_all ();
1030 /* Process the symbol file ABFD, as either the main file or as a
1031 dynamically loaded file.
1033 See symbol_file_add_with_addrs_or_offsets's comments for
1036 symbol_file_add_from_bfd (bfd
*abfd
, int from_tty
,
1037 struct section_addr_info
*addrs
,
1038 int mainline
, int flags
)
1040 return symbol_file_add_with_addrs_or_offsets (abfd
,
1041 from_tty
, addrs
, 0, 0,
1046 /* Process a symbol file, as either the main file or as a dynamically
1047 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1050 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
1051 int mainline
, int flags
)
1053 return symbol_file_add_from_bfd (symfile_bfd_open (name
), from_tty
,
1054 addrs
, mainline
, flags
);
1058 /* Call symbol_file_add() with default values and update whatever is
1059 affected by the loading of a new main().
1060 Used when the file is supplied in the gdb command line
1061 and by some targets with special loading requirements.
1062 The auxiliary function, symbol_file_add_main_1(), has the flags
1063 argument for the switches that can only be specified in the symbol_file
1067 symbol_file_add_main (char *args
, int from_tty
)
1069 symbol_file_add_main_1 (args
, from_tty
, 0);
1073 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1075 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1077 /* Getting new symbols may change our opinion about
1078 what is frameless. */
1079 reinit_frame_cache ();
1081 set_initial_language ();
1085 symbol_file_clear (int from_tty
)
1087 if ((have_full_symbols () || have_partial_symbols ())
1090 ? !query (_("Discard symbol table from `%s'? "),
1091 symfile_objfile
->name
)
1092 : !query (_("Discard symbol table? "))))
1093 error (_("Not confirmed."));
1094 free_all_objfiles ();
1096 /* solib descriptors may have handles to objfiles. Since their
1097 storage has just been released, we'd better wipe the solib
1098 descriptors as well.
1100 #if defined(SOLIB_RESTART)
1104 symfile_objfile
= NULL
;
1106 printf_unfiltered (_("No symbol file now.\n"));
1110 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1113 bfd_size_type debuglink_size
;
1114 unsigned long crc32
;
1119 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1124 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1126 contents
= xmalloc (debuglink_size
);
1127 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1128 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1130 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1131 crc_offset
= strlen (contents
) + 1;
1132 crc_offset
= (crc_offset
+ 3) & ~3;
1134 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1141 separate_debug_file_exists (const char *name
, unsigned long crc
)
1143 unsigned long file_crc
= 0;
1145 gdb_byte buffer
[8*1024];
1148 fd
= open (name
, O_RDONLY
| O_BINARY
);
1152 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1153 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1157 return crc
== file_crc
;
1160 char *debug_file_directory
= NULL
;
1162 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1163 struct cmd_list_element
*c
, const char *value
)
1165 fprintf_filtered (file
, _("\
1166 The directory where separate debug symbols are searched for is \"%s\".\n"),
1170 #if ! defined (DEBUG_SUBDIRECTORY)
1171 #define DEBUG_SUBDIRECTORY ".debug"
1175 find_separate_debug_file (struct objfile
*objfile
)
1183 bfd_size_type debuglink_size
;
1184 unsigned long crc32
;
1187 basename
= get_debug_link_info (objfile
, &crc32
);
1189 if (basename
== NULL
)
1192 dir
= xstrdup (objfile
->name
);
1194 /* Strip off the final filename part, leaving the directory name,
1195 followed by a slash. Objfile names should always be absolute and
1196 tilde-expanded, so there should always be a slash in there
1198 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1200 if (IS_DIR_SEPARATOR (dir
[i
]))
1203 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1206 debugfile
= alloca (strlen (debug_file_directory
) + 1
1208 + strlen (DEBUG_SUBDIRECTORY
)
1213 /* First try in the same directory as the original file. */
1214 strcpy (debugfile
, dir
);
1215 strcat (debugfile
, basename
);
1217 if (separate_debug_file_exists (debugfile
, crc32
))
1221 return xstrdup (debugfile
);
1224 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1225 strcpy (debugfile
, dir
);
1226 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1227 strcat (debugfile
, "/");
1228 strcat (debugfile
, basename
);
1230 if (separate_debug_file_exists (debugfile
, crc32
))
1234 return xstrdup (debugfile
);
1237 /* Then try in the global debugfile directory. */
1238 strcpy (debugfile
, debug_file_directory
);
1239 strcat (debugfile
, "/");
1240 strcat (debugfile
, dir
);
1241 strcat (debugfile
, basename
);
1243 if (separate_debug_file_exists (debugfile
, crc32
))
1247 return xstrdup (debugfile
);
1250 /* If the file is in the sysroot, try using its base path in the
1251 global debugfile directory. */
1252 canon_name
= lrealpath (dir
);
1254 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1255 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1257 strcpy (debugfile
, debug_file_directory
);
1258 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1259 strcat (debugfile
, "/");
1260 strcat (debugfile
, basename
);
1262 if (separate_debug_file_exists (debugfile
, crc32
))
1267 return xstrdup (debugfile
);
1280 /* This is the symbol-file command. Read the file, analyze its
1281 symbols, and add a struct symtab to a symtab list. The syntax of
1282 the command is rather bizarre:
1284 1. The function buildargv implements various quoting conventions
1285 which are undocumented and have little or nothing in common with
1286 the way things are quoted (or not quoted) elsewhere in GDB.
1288 2. Options are used, which are not generally used in GDB (perhaps
1289 "set mapped on", "set readnow on" would be better)
1291 3. The order of options matters, which is contrary to GNU
1292 conventions (because it is confusing and inconvenient). */
1295 symbol_file_command (char *args
, int from_tty
)
1301 symbol_file_clear (from_tty
);
1305 char **argv
= buildargv (args
);
1306 int flags
= OBJF_USERLOADED
;
1307 struct cleanup
*cleanups
;
1313 cleanups
= make_cleanup_freeargv (argv
);
1314 while (*argv
!= NULL
)
1316 if (strcmp (*argv
, "-readnow") == 0)
1317 flags
|= OBJF_READNOW
;
1318 else if (**argv
== '-')
1319 error (_("unknown option `%s'"), *argv
);
1322 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1330 error (_("no symbol file name was specified"));
1332 do_cleanups (cleanups
);
1336 /* Set the initial language.
1338 FIXME: A better solution would be to record the language in the
1339 psymtab when reading partial symbols, and then use it (if known) to
1340 set the language. This would be a win for formats that encode the
1341 language in an easily discoverable place, such as DWARF. For
1342 stabs, we can jump through hoops looking for specially named
1343 symbols or try to intuit the language from the specific type of
1344 stabs we find, but we can't do that until later when we read in
1348 set_initial_language (void)
1350 struct partial_symtab
*pst
;
1351 enum language lang
= language_unknown
;
1353 pst
= find_main_psymtab ();
1356 if (pst
->filename
!= NULL
)
1357 lang
= deduce_language_from_filename (pst
->filename
);
1359 if (lang
== language_unknown
)
1361 /* Make C the default language */
1365 set_language (lang
);
1366 expected_language
= current_language
; /* Don't warn the user. */
1370 /* Open the file specified by NAME and hand it off to BFD for
1371 preliminary analysis. Return a newly initialized bfd *, which
1372 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1373 absolute). In case of trouble, error() is called. */
1376 symfile_bfd_open (char *name
)
1380 char *absolute_name
;
1382 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1384 /* Look down path for it, allocate 2nd new malloc'd copy. */
1385 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1386 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1387 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1390 char *exename
= alloca (strlen (name
) + 5);
1391 strcat (strcpy (exename
, name
), ".exe");
1392 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1393 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1398 make_cleanup (xfree
, name
);
1399 perror_with_name (name
);
1402 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1403 bfd. It'll be freed in free_objfile(). */
1405 name
= absolute_name
;
1407 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1411 make_cleanup (xfree
, name
);
1412 error (_("\"%s\": can't open to read symbols: %s."), name
,
1413 bfd_errmsg (bfd_get_error ()));
1415 bfd_set_cacheable (sym_bfd
, 1);
1417 if (!bfd_check_format (sym_bfd
, bfd_object
))
1419 /* FIXME: should be checking for errors from bfd_close (for one
1420 thing, on error it does not free all the storage associated
1422 bfd_close (sym_bfd
); /* This also closes desc. */
1423 make_cleanup (xfree
, name
);
1424 error (_("\"%s\": can't read symbols: %s."), name
,
1425 bfd_errmsg (bfd_get_error ()));
1431 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1432 the section was not found. */
1435 get_section_index (struct objfile
*objfile
, char *section_name
)
1437 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1445 /* Link SF into the global symtab_fns list. Called on startup by the
1446 _initialize routine in each object file format reader, to register
1447 information about each format the the reader is prepared to
1451 add_symtab_fns (struct sym_fns
*sf
)
1453 sf
->next
= symtab_fns
;
1457 /* Initialize OBJFILE to read symbols from its associated BFD. It
1458 either returns or calls error(). The result is an initialized
1459 struct sym_fns in the objfile structure, that contains cached
1460 information about the symbol file. */
1463 find_sym_fns (struct objfile
*objfile
)
1466 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1467 char *our_target
= bfd_get_target (objfile
->obfd
);
1469 if (our_flavour
== bfd_target_srec_flavour
1470 || our_flavour
== bfd_target_ihex_flavour
1471 || our_flavour
== bfd_target_tekhex_flavour
)
1472 return; /* No symbols. */
1474 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1476 if (our_flavour
== sf
->sym_flavour
)
1483 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1484 bfd_get_target (objfile
->obfd
));
1488 /* This function runs the load command of our current target. */
1491 load_command (char *arg
, int from_tty
)
1498 parg
= arg
= get_exec_file (1);
1500 /* Count how many \ " ' tab space there are in the name. */
1501 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1509 /* We need to quote this string so buildargv can pull it apart. */
1510 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1514 make_cleanup (xfree
, temp
);
1517 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1519 strncpy (ptemp
, prev
, parg
- prev
);
1520 ptemp
+= parg
- prev
;
1524 strcpy (ptemp
, prev
);
1530 /* The user might be reloading because the binary has changed. Take
1531 this opportunity to check. */
1532 reopen_exec_file ();
1535 target_load (arg
, from_tty
);
1537 /* After re-loading the executable, we don't really know which
1538 overlays are mapped any more. */
1539 overlay_cache_invalid
= 1;
1542 /* This version of "load" should be usable for any target. Currently
1543 it is just used for remote targets, not inftarg.c or core files,
1544 on the theory that only in that case is it useful.
1546 Avoiding xmodem and the like seems like a win (a) because we don't have
1547 to worry about finding it, and (b) On VMS, fork() is very slow and so
1548 we don't want to run a subprocess. On the other hand, I'm not sure how
1549 performance compares. */
1551 static int validate_download
= 0;
1553 /* Callback service function for generic_load (bfd_map_over_sections). */
1556 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1558 bfd_size_type
*sum
= data
;
1560 *sum
+= bfd_get_section_size (asec
);
1563 /* Opaque data for load_section_callback. */
1564 struct load_section_data
{
1565 unsigned long load_offset
;
1566 struct load_progress_data
*progress_data
;
1567 VEC(memory_write_request_s
) *requests
;
1570 /* Opaque data for load_progress. */
1571 struct load_progress_data
{
1572 /* Cumulative data. */
1573 unsigned long write_count
;
1574 unsigned long data_count
;
1575 bfd_size_type total_size
;
1578 /* Opaque data for load_progress for a single section. */
1579 struct load_progress_section_data
{
1580 struct load_progress_data
*cumulative
;
1582 /* Per-section data. */
1583 const char *section_name
;
1584 ULONGEST section_sent
;
1585 ULONGEST section_size
;
1590 /* Target write callback routine for progress reporting. */
1593 load_progress (ULONGEST bytes
, void *untyped_arg
)
1595 struct load_progress_section_data
*args
= untyped_arg
;
1596 struct load_progress_data
*totals
;
1599 /* Writing padding data. No easy way to get at the cumulative
1600 stats, so just ignore this. */
1603 totals
= args
->cumulative
;
1605 if (bytes
== 0 && args
->section_sent
== 0)
1607 /* The write is just starting. Let the user know we've started
1609 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1610 args
->section_name
, paddr_nz (args
->section_size
),
1611 paddr_nz (args
->lma
));
1615 if (validate_download
)
1617 /* Broken memories and broken monitors manifest themselves here
1618 when bring new computers to life. This doubles already slow
1620 /* NOTE: cagney/1999-10-18: A more efficient implementation
1621 might add a verify_memory() method to the target vector and
1622 then use that. remote.c could implement that method using
1623 the ``qCRC'' packet. */
1624 gdb_byte
*check
= xmalloc (bytes
);
1625 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1627 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1628 error (_("Download verify read failed at 0x%s"),
1630 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1631 error (_("Download verify compare failed at 0x%s"),
1633 do_cleanups (verify_cleanups
);
1635 totals
->data_count
+= bytes
;
1637 args
->buffer
+= bytes
;
1638 totals
->write_count
+= 1;
1639 args
->section_sent
+= bytes
;
1641 || (deprecated_ui_load_progress_hook
!= NULL
1642 && deprecated_ui_load_progress_hook (args
->section_name
,
1643 args
->section_sent
)))
1644 error (_("Canceled the download"));
1646 if (deprecated_show_load_progress
!= NULL
)
1647 deprecated_show_load_progress (args
->section_name
,
1651 totals
->total_size
);
1654 /* Callback service function for generic_load (bfd_map_over_sections). */
1657 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1659 struct memory_write_request
*new_request
;
1660 struct load_section_data
*args
= data
;
1661 struct load_progress_section_data
*section_data
;
1662 bfd_size_type size
= bfd_get_section_size (asec
);
1664 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1666 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1672 new_request
= VEC_safe_push (memory_write_request_s
,
1673 args
->requests
, NULL
);
1674 memset (new_request
, 0, sizeof (struct memory_write_request
));
1675 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1676 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1677 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1678 new_request
->data
= xmalloc (size
);
1679 new_request
->baton
= section_data
;
1681 buffer
= new_request
->data
;
1683 section_data
->cumulative
= args
->progress_data
;
1684 section_data
->section_name
= sect_name
;
1685 section_data
->section_size
= size
;
1686 section_data
->lma
= new_request
->begin
;
1687 section_data
->buffer
= buffer
;
1689 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1692 /* Clean up an entire memory request vector, including load
1693 data and progress records. */
1696 clear_memory_write_data (void *arg
)
1698 VEC(memory_write_request_s
) **vec_p
= arg
;
1699 VEC(memory_write_request_s
) *vec
= *vec_p
;
1701 struct memory_write_request
*mr
;
1703 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1708 VEC_free (memory_write_request_s
, vec
);
1712 generic_load (char *args
, int from_tty
)
1715 struct timeval start_time
, end_time
;
1717 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1718 struct load_section_data cbdata
;
1719 struct load_progress_data total_progress
;
1724 memset (&cbdata
, 0, sizeof (cbdata
));
1725 memset (&total_progress
, 0, sizeof (total_progress
));
1726 cbdata
.progress_data
= &total_progress
;
1728 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1730 argv
= buildargv (args
);
1735 make_cleanup_freeargv (argv
);
1737 filename
= tilde_expand (argv
[0]);
1738 make_cleanup (xfree
, filename
);
1740 if (argv
[1] != NULL
)
1744 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1746 /* If the last word was not a valid number then
1747 treat it as a file name with spaces in. */
1748 if (argv
[1] == endptr
)
1749 error (_("Invalid download offset:%s."), argv
[1]);
1751 if (argv
[2] != NULL
)
1752 error (_("Too many parameters."));
1755 /* Open the file for loading. */
1756 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1757 if (loadfile_bfd
== NULL
)
1759 perror_with_name (filename
);
1763 /* FIXME: should be checking for errors from bfd_close (for one thing,
1764 on error it does not free all the storage associated with the
1766 make_cleanup_bfd_close (loadfile_bfd
);
1768 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1770 error (_("\"%s\" is not an object file: %s"), filename
,
1771 bfd_errmsg (bfd_get_error ()));
1774 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1775 (void *) &total_progress
.total_size
);
1777 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1779 gettimeofday (&start_time
, NULL
);
1781 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1782 load_progress
) != 0)
1783 error (_("Load failed"));
1785 gettimeofday (&end_time
, NULL
);
1787 entry
= bfd_get_start_address (loadfile_bfd
);
1788 ui_out_text (uiout
, "Start address ");
1789 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1790 ui_out_text (uiout
, ", load size ");
1791 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
1792 ui_out_text (uiout
, "\n");
1793 /* We were doing this in remote-mips.c, I suspect it is right
1794 for other targets too. */
1797 /* FIXME: are we supposed to call symbol_file_add or not? According
1798 to a comment from remote-mips.c (where a call to symbol_file_add
1799 was commented out), making the call confuses GDB if more than one
1800 file is loaded in. Some targets do (e.g., remote-vx.c) but
1801 others don't (or didn't - perhaps they have all been deleted). */
1803 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
1804 total_progress
.write_count
,
1805 &start_time
, &end_time
);
1807 do_cleanups (old_cleanups
);
1810 /* Report how fast the transfer went. */
1812 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1813 replaced by print_transfer_performance (with a very different
1814 function signature). */
1817 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1820 struct timeval start
, end
;
1822 start
.tv_sec
= start_time
;
1824 end
.tv_sec
= end_time
;
1827 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
1831 print_transfer_performance (struct ui_file
*stream
,
1832 unsigned long data_count
,
1833 unsigned long write_count
,
1834 const struct timeval
*start_time
,
1835 const struct timeval
*end_time
)
1837 unsigned long time_count
;
1839 /* Compute the elapsed time in milliseconds, as a tradeoff between
1840 accuracy and overflow. */
1841 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
1842 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
1844 ui_out_text (uiout
, "Transfer rate: ");
1847 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1848 1000 * (data_count
* 8) / time_count
);
1849 ui_out_text (uiout
, " bits/sec");
1853 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1854 ui_out_text (uiout
, " bits in <1 sec");
1856 if (write_count
> 0)
1858 ui_out_text (uiout
, ", ");
1859 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1860 ui_out_text (uiout
, " bytes/write");
1862 ui_out_text (uiout
, ".\n");
1865 /* This function allows the addition of incrementally linked object files.
1866 It does not modify any state in the target, only in the debugger. */
1867 /* Note: ezannoni 2000-04-13 This function/command used to have a
1868 special case syntax for the rombug target (Rombug is the boot
1869 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1870 rombug case, the user doesn't need to supply a text address,
1871 instead a call to target_link() (in target.c) would supply the
1872 value to use. We are now discontinuing this type of ad hoc syntax. */
1875 add_symbol_file_command (char *args
, int from_tty
)
1877 char *filename
= NULL
;
1878 int flags
= OBJF_USERLOADED
;
1880 int expecting_option
= 0;
1881 int section_index
= 0;
1885 int expecting_sec_name
= 0;
1886 int expecting_sec_addr
= 0;
1895 struct section_addr_info
*section_addrs
;
1896 struct sect_opt
*sect_opts
= NULL
;
1897 size_t num_sect_opts
= 0;
1898 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1901 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1902 * sizeof (struct sect_opt
));
1907 error (_("add-symbol-file takes a file name and an address"));
1909 argv
= buildargv (args
);
1910 make_cleanup_freeargv (argv
);
1915 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
1917 /* Process the argument. */
1920 /* The first argument is the file name. */
1921 filename
= tilde_expand (arg
);
1922 make_cleanup (xfree
, filename
);
1927 /* The second argument is always the text address at which
1928 to load the program. */
1929 sect_opts
[section_index
].name
= ".text";
1930 sect_opts
[section_index
].value
= arg
;
1931 if (++section_index
>= num_sect_opts
)
1934 sect_opts
= ((struct sect_opt
*)
1935 xrealloc (sect_opts
,
1937 * sizeof (struct sect_opt
)));
1942 /* It's an option (starting with '-') or it's an argument
1947 if (strcmp (arg
, "-readnow") == 0)
1948 flags
|= OBJF_READNOW
;
1949 else if (strcmp (arg
, "-s") == 0)
1951 expecting_sec_name
= 1;
1952 expecting_sec_addr
= 1;
1957 if (expecting_sec_name
)
1959 sect_opts
[section_index
].name
= arg
;
1960 expecting_sec_name
= 0;
1963 if (expecting_sec_addr
)
1965 sect_opts
[section_index
].value
= arg
;
1966 expecting_sec_addr
= 0;
1967 if (++section_index
>= num_sect_opts
)
1970 sect_opts
= ((struct sect_opt
*)
1971 xrealloc (sect_opts
,
1973 * sizeof (struct sect_opt
)));
1977 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
1982 /* This command takes at least two arguments. The first one is a
1983 filename, and the second is the address where this file has been
1984 loaded. Abort now if this address hasn't been provided by the
1986 if (section_index
< 1)
1987 error (_("The address where %s has been loaded is missing"), filename
);
1989 /* Print the prompt for the query below. And save the arguments into
1990 a sect_addr_info structure to be passed around to other
1991 functions. We have to split this up into separate print
1992 statements because hex_string returns a local static
1995 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
1996 section_addrs
= alloc_section_addr_info (section_index
);
1997 make_cleanup (xfree
, section_addrs
);
1998 for (i
= 0; i
< section_index
; i
++)
2001 char *val
= sect_opts
[i
].value
;
2002 char *sec
= sect_opts
[i
].name
;
2004 addr
= parse_and_eval_address (val
);
2006 /* Here we store the section offsets in the order they were
2007 entered on the command line. */
2008 section_addrs
->other
[sec_num
].name
= sec
;
2009 section_addrs
->other
[sec_num
].addr
= addr
;
2010 printf_unfiltered ("\t%s_addr = %s\n",
2011 sec
, hex_string ((unsigned long)addr
));
2014 /* The object's sections are initialized when a
2015 call is made to build_objfile_section_table (objfile).
2016 This happens in reread_symbols.
2017 At this point, we don't know what file type this is,
2018 so we can't determine what section names are valid. */
2021 if (from_tty
&& (!query ("%s", "")))
2022 error (_("Not confirmed."));
2024 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
2026 /* Getting new symbols may change our opinion about what is
2028 reinit_frame_cache ();
2029 do_cleanups (my_cleanups
);
2033 add_shared_symbol_files_command (char *args
, int from_tty
)
2035 #ifdef ADD_SHARED_SYMBOL_FILES
2036 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
2038 error (_("This command is not available in this configuration of GDB."));
2042 /* Re-read symbols if a symbol-file has changed. */
2044 reread_symbols (void)
2046 struct objfile
*objfile
;
2049 struct stat new_statbuf
;
2052 /* With the addition of shared libraries, this should be modified,
2053 the load time should be saved in the partial symbol tables, since
2054 different tables may come from different source files. FIXME.
2055 This routine should then walk down each partial symbol table
2056 and see if the symbol table that it originates from has been changed */
2058 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2062 #ifdef DEPRECATED_IBM6000_TARGET
2063 /* If this object is from a shared library, then you should
2064 stat on the library name, not member name. */
2066 if (objfile
->obfd
->my_archive
)
2067 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2070 res
= stat (objfile
->name
, &new_statbuf
);
2073 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2074 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2078 new_modtime
= new_statbuf
.st_mtime
;
2079 if (new_modtime
!= objfile
->mtime
)
2081 struct cleanup
*old_cleanups
;
2082 struct section_offsets
*offsets
;
2084 char *obfd_filename
;
2086 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2089 /* There are various functions like symbol_file_add,
2090 symfile_bfd_open, syms_from_objfile, etc., which might
2091 appear to do what we want. But they have various other
2092 effects which we *don't* want. So we just do stuff
2093 ourselves. We don't worry about mapped files (for one thing,
2094 any mapped file will be out of date). */
2096 /* If we get an error, blow away this objfile (not sure if
2097 that is the correct response for things like shared
2099 old_cleanups
= make_cleanup_free_objfile (objfile
);
2100 /* We need to do this whenever any symbols go away. */
2101 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2103 /* Clean up any state BFD has sitting around. We don't need
2104 to close the descriptor but BFD lacks a way of closing the
2105 BFD without closing the descriptor. */
2106 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2107 if (!bfd_close (objfile
->obfd
))
2108 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2109 bfd_errmsg (bfd_get_error ()));
2110 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2111 if (objfile
->obfd
== NULL
)
2112 error (_("Can't open %s to read symbols."), objfile
->name
);
2113 /* bfd_openr sets cacheable to true, which is what we want. */
2114 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2115 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2116 bfd_errmsg (bfd_get_error ()));
2118 /* Save the offsets, we will nuke them with the rest of the
2120 num_offsets
= objfile
->num_sections
;
2121 offsets
= ((struct section_offsets
*)
2122 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2123 memcpy (offsets
, objfile
->section_offsets
,
2124 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2126 /* Remove any references to this objfile in the global
2128 preserve_values (objfile
);
2130 /* Nuke all the state that we will re-read. Much of the following
2131 code which sets things to NULL really is necessary to tell
2132 other parts of GDB that there is nothing currently there. */
2134 /* FIXME: Do we have to free a whole linked list, or is this
2136 if (objfile
->global_psymbols
.list
)
2137 xfree (objfile
->global_psymbols
.list
);
2138 memset (&objfile
->global_psymbols
, 0,
2139 sizeof (objfile
->global_psymbols
));
2140 if (objfile
->static_psymbols
.list
)
2141 xfree (objfile
->static_psymbols
.list
);
2142 memset (&objfile
->static_psymbols
, 0,
2143 sizeof (objfile
->static_psymbols
));
2145 /* Free the obstacks for non-reusable objfiles */
2146 bcache_xfree (objfile
->psymbol_cache
);
2147 objfile
->psymbol_cache
= bcache_xmalloc ();
2148 bcache_xfree (objfile
->macro_cache
);
2149 objfile
->macro_cache
= bcache_xmalloc ();
2150 if (objfile
->demangled_names_hash
!= NULL
)
2152 htab_delete (objfile
->demangled_names_hash
);
2153 objfile
->demangled_names_hash
= NULL
;
2155 obstack_free (&objfile
->objfile_obstack
, 0);
2156 objfile
->sections
= NULL
;
2157 objfile
->symtabs
= NULL
;
2158 objfile
->psymtabs
= NULL
;
2159 objfile
->free_psymtabs
= NULL
;
2160 objfile
->cp_namespace_symtab
= NULL
;
2161 objfile
->msymbols
= NULL
;
2162 objfile
->deprecated_sym_private
= NULL
;
2163 objfile
->minimal_symbol_count
= 0;
2164 memset (&objfile
->msymbol_hash
, 0,
2165 sizeof (objfile
->msymbol_hash
));
2166 memset (&objfile
->msymbol_demangled_hash
, 0,
2167 sizeof (objfile
->msymbol_demangled_hash
));
2168 objfile
->fundamental_types
= NULL
;
2169 clear_objfile_data (objfile
);
2170 if (objfile
->sf
!= NULL
)
2172 (*objfile
->sf
->sym_finish
) (objfile
);
2175 /* We never make this a mapped file. */
2177 objfile
->psymbol_cache
= bcache_xmalloc ();
2178 objfile
->macro_cache
= bcache_xmalloc ();
2179 /* obstack_init also initializes the obstack so it is
2180 empty. We could use obstack_specify_allocation but
2181 gdb_obstack.h specifies the alloc/dealloc
2183 obstack_init (&objfile
->objfile_obstack
);
2184 if (build_objfile_section_table (objfile
))
2186 error (_("Can't find the file sections in `%s': %s"),
2187 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2189 terminate_minimal_symbol_table (objfile
);
2191 /* We use the same section offsets as from last time. I'm not
2192 sure whether that is always correct for shared libraries. */
2193 objfile
->section_offsets
= (struct section_offsets
*)
2194 obstack_alloc (&objfile
->objfile_obstack
,
2195 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2196 memcpy (objfile
->section_offsets
, offsets
,
2197 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2198 objfile
->num_sections
= num_offsets
;
2200 /* What the hell is sym_new_init for, anyway? The concept of
2201 distinguishing between the main file and additional files
2202 in this way seems rather dubious. */
2203 if (objfile
== symfile_objfile
)
2205 (*objfile
->sf
->sym_new_init
) (objfile
);
2208 (*objfile
->sf
->sym_init
) (objfile
);
2209 clear_complaints (&symfile_complaints
, 1, 1);
2210 /* The "mainline" parameter is a hideous hack; I think leaving it
2211 zero is OK since dbxread.c also does what it needs to do if
2212 objfile->global_psymbols.size is 0. */
2213 (*objfile
->sf
->sym_read
) (objfile
, 0);
2214 if (!have_partial_symbols () && !have_full_symbols ())
2217 printf_unfiltered (_("(no debugging symbols found)\n"));
2220 objfile
->flags
|= OBJF_SYMS
;
2222 /* We're done reading the symbol file; finish off complaints. */
2223 clear_complaints (&symfile_complaints
, 0, 1);
2225 /* Getting new symbols may change our opinion about what is
2228 reinit_frame_cache ();
2230 /* Discard cleanups as symbol reading was successful. */
2231 discard_cleanups (old_cleanups
);
2233 /* If the mtime has changed between the time we set new_modtime
2234 and now, we *want* this to be out of date, so don't call stat
2236 objfile
->mtime
= new_modtime
;
2238 reread_separate_symbols (objfile
);
2245 clear_symtab_users ();
2246 /* At least one objfile has changed, so we can consider that
2247 the executable we're debugging has changed too. */
2248 observer_notify_executable_changed (NULL
);
2254 /* Handle separate debug info for OBJFILE, which has just been
2256 - If we had separate debug info before, but now we don't, get rid
2257 of the separated objfile.
2258 - If we didn't have separated debug info before, but now we do,
2259 read in the new separated debug info file.
2260 - If the debug link points to a different file, toss the old one
2261 and read the new one.
2262 This function does *not* handle the case where objfile is still
2263 using the same separate debug info file, but that file's timestamp
2264 has changed. That case should be handled by the loop in
2265 reread_symbols already. */
2267 reread_separate_symbols (struct objfile
*objfile
)
2270 unsigned long crc32
;
2272 /* Does the updated objfile's debug info live in a
2274 debug_file
= find_separate_debug_file (objfile
);
2276 if (objfile
->separate_debug_objfile
)
2278 /* There are two cases where we need to get rid of
2279 the old separated debug info objfile:
2280 - if the new primary objfile doesn't have
2281 separated debug info, or
2282 - if the new primary objfile has separate debug
2283 info, but it's under a different filename.
2285 If the old and new objfiles both have separate
2286 debug info, under the same filename, then we're
2287 okay --- if the separated file's contents have
2288 changed, we will have caught that when we
2289 visited it in this function's outermost
2292 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2293 free_objfile (objfile
->separate_debug_objfile
);
2296 /* If the new objfile has separate debug info, and we
2297 haven't loaded it already, do so now. */
2299 && ! objfile
->separate_debug_objfile
)
2301 /* Use the same section offset table as objfile itself.
2302 Preserve the flags from objfile that make sense. */
2303 objfile
->separate_debug_objfile
2304 = (symbol_file_add_with_addrs_or_offsets
2305 (symfile_bfd_open (debug_file
),
2306 info_verbose
, /* from_tty: Don't override the default. */
2307 0, /* No addr table. */
2308 objfile
->section_offsets
, objfile
->num_sections
,
2309 0, /* Not mainline. See comments about this above. */
2310 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2311 | OBJF_USERLOADED
)));
2312 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2328 static filename_language
*filename_language_table
;
2329 static int fl_table_size
, fl_table_next
;
2332 add_filename_language (char *ext
, enum language lang
)
2334 if (fl_table_next
>= fl_table_size
)
2336 fl_table_size
+= 10;
2337 filename_language_table
=
2338 xrealloc (filename_language_table
,
2339 fl_table_size
* sizeof (*filename_language_table
));
2342 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2343 filename_language_table
[fl_table_next
].lang
= lang
;
2347 static char *ext_args
;
2349 show_ext_args (struct ui_file
*file
, int from_tty
,
2350 struct cmd_list_element
*c
, const char *value
)
2352 fprintf_filtered (file
, _("\
2353 Mapping between filename extension and source language is \"%s\".\n"),
2358 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2361 char *cp
= ext_args
;
2364 /* First arg is filename extension, starting with '.' */
2366 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2368 /* Find end of first arg. */
2369 while (*cp
&& !isspace (*cp
))
2373 error (_("'%s': two arguments required -- filename extension and language"),
2376 /* Null-terminate first arg */
2379 /* Find beginning of second arg, which should be a source language. */
2380 while (*cp
&& isspace (*cp
))
2384 error (_("'%s': two arguments required -- filename extension and language"),
2387 /* Lookup the language from among those we know. */
2388 lang
= language_enum (cp
);
2390 /* Now lookup the filename extension: do we already know it? */
2391 for (i
= 0; i
< fl_table_next
; i
++)
2392 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2395 if (i
>= fl_table_next
)
2397 /* new file extension */
2398 add_filename_language (ext_args
, lang
);
2402 /* redefining a previously known filename extension */
2405 /* query ("Really make files of type %s '%s'?", */
2406 /* ext_args, language_str (lang)); */
2408 xfree (filename_language_table
[i
].ext
);
2409 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2410 filename_language_table
[i
].lang
= lang
;
2415 info_ext_lang_command (char *args
, int from_tty
)
2419 printf_filtered (_("Filename extensions and the languages they represent:"));
2420 printf_filtered ("\n\n");
2421 for (i
= 0; i
< fl_table_next
; i
++)
2422 printf_filtered ("\t%s\t- %s\n",
2423 filename_language_table
[i
].ext
,
2424 language_str (filename_language_table
[i
].lang
));
2428 init_filename_language_table (void)
2430 if (fl_table_size
== 0) /* protect against repetition */
2434 filename_language_table
=
2435 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2436 add_filename_language (".c", language_c
);
2437 add_filename_language (".C", language_cplus
);
2438 add_filename_language (".cc", language_cplus
);
2439 add_filename_language (".cp", language_cplus
);
2440 add_filename_language (".cpp", language_cplus
);
2441 add_filename_language (".cxx", language_cplus
);
2442 add_filename_language (".c++", language_cplus
);
2443 add_filename_language (".java", language_java
);
2444 add_filename_language (".class", language_java
);
2445 add_filename_language (".m", language_objc
);
2446 add_filename_language (".f", language_fortran
);
2447 add_filename_language (".F", language_fortran
);
2448 add_filename_language (".s", language_asm
);
2449 add_filename_language (".S", language_asm
);
2450 add_filename_language (".pas", language_pascal
);
2451 add_filename_language (".p", language_pascal
);
2452 add_filename_language (".pp", language_pascal
);
2453 add_filename_language (".adb", language_ada
);
2454 add_filename_language (".ads", language_ada
);
2455 add_filename_language (".a", language_ada
);
2456 add_filename_language (".ada", language_ada
);
2461 deduce_language_from_filename (char *filename
)
2466 if (filename
!= NULL
)
2467 if ((cp
= strrchr (filename
, '.')) != NULL
)
2468 for (i
= 0; i
< fl_table_next
; i
++)
2469 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2470 return filename_language_table
[i
].lang
;
2472 return language_unknown
;
2477 Allocate and partly initialize a new symbol table. Return a pointer
2478 to it. error() if no space.
2480 Caller must set these fields:
2486 possibly free_named_symtabs (symtab->filename);
2490 allocate_symtab (char *filename
, struct objfile
*objfile
)
2492 struct symtab
*symtab
;
2494 symtab
= (struct symtab
*)
2495 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2496 memset (symtab
, 0, sizeof (*symtab
));
2497 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2498 &objfile
->objfile_obstack
);
2499 symtab
->fullname
= NULL
;
2500 symtab
->language
= deduce_language_from_filename (filename
);
2501 symtab
->debugformat
= obsavestring ("unknown", 7,
2502 &objfile
->objfile_obstack
);
2504 /* Hook it to the objfile it comes from */
2506 symtab
->objfile
= objfile
;
2507 symtab
->next
= objfile
->symtabs
;
2508 objfile
->symtabs
= symtab
;
2513 struct partial_symtab
*
2514 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2516 struct partial_symtab
*psymtab
;
2518 if (objfile
->free_psymtabs
)
2520 psymtab
= objfile
->free_psymtabs
;
2521 objfile
->free_psymtabs
= psymtab
->next
;
2524 psymtab
= (struct partial_symtab
*)
2525 obstack_alloc (&objfile
->objfile_obstack
,
2526 sizeof (struct partial_symtab
));
2528 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2529 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2530 &objfile
->objfile_obstack
);
2531 psymtab
->symtab
= NULL
;
2533 /* Prepend it to the psymtab list for the objfile it belongs to.
2534 Psymtabs are searched in most recent inserted -> least recent
2537 psymtab
->objfile
= objfile
;
2538 psymtab
->next
= objfile
->psymtabs
;
2539 objfile
->psymtabs
= psymtab
;
2542 struct partial_symtab
**prev_pst
;
2543 psymtab
->objfile
= objfile
;
2544 psymtab
->next
= NULL
;
2545 prev_pst
= &(objfile
->psymtabs
);
2546 while ((*prev_pst
) != NULL
)
2547 prev_pst
= &((*prev_pst
)->next
);
2548 (*prev_pst
) = psymtab
;
2556 discard_psymtab (struct partial_symtab
*pst
)
2558 struct partial_symtab
**prev_pst
;
2561 Empty psymtabs happen as a result of header files which don't
2562 have any symbols in them. There can be a lot of them. But this
2563 check is wrong, in that a psymtab with N_SLINE entries but
2564 nothing else is not empty, but we don't realize that. Fixing
2565 that without slowing things down might be tricky. */
2567 /* First, snip it out of the psymtab chain */
2569 prev_pst
= &(pst
->objfile
->psymtabs
);
2570 while ((*prev_pst
) != pst
)
2571 prev_pst
= &((*prev_pst
)->next
);
2572 (*prev_pst
) = pst
->next
;
2574 /* Next, put it on a free list for recycling */
2576 pst
->next
= pst
->objfile
->free_psymtabs
;
2577 pst
->objfile
->free_psymtabs
= pst
;
2581 /* Reset all data structures in gdb which may contain references to symbol
2585 clear_symtab_users (void)
2587 /* Someday, we should do better than this, by only blowing away
2588 the things that really need to be blown. */
2590 /* Clear the "current" symtab first, because it is no longer valid.
2591 breakpoint_re_set may try to access the current symtab. */
2592 clear_current_source_symtab_and_line ();
2595 breakpoint_re_set ();
2596 set_default_breakpoint (0, 0, 0, 0);
2597 clear_pc_function_cache ();
2598 if (deprecated_target_new_objfile_hook
)
2599 deprecated_target_new_objfile_hook (NULL
);
2601 /* Clear globals which might have pointed into a removed objfile.
2602 FIXME: It's not clear which of these are supposed to persist
2603 between expressions and which ought to be reset each time. */
2604 expression_context_block
= NULL
;
2605 innermost_block
= NULL
;
2607 /* Varobj may refer to old symbols, perform a cleanup. */
2608 varobj_invalidate ();
2613 clear_symtab_users_cleanup (void *ignore
)
2615 clear_symtab_users ();
2618 /* clear_symtab_users_once:
2620 This function is run after symbol reading, or from a cleanup.
2621 If an old symbol table was obsoleted, the old symbol table
2622 has been blown away, but the other GDB data structures that may
2623 reference it have not yet been cleared or re-directed. (The old
2624 symtab was zapped, and the cleanup queued, in free_named_symtab()
2627 This function can be queued N times as a cleanup, or called
2628 directly; it will do all the work the first time, and then will be a
2629 no-op until the next time it is queued. This works by bumping a
2630 counter at queueing time. Much later when the cleanup is run, or at
2631 the end of symbol processing (in case the cleanup is discarded), if
2632 the queued count is greater than the "done-count", we do the work
2633 and set the done-count to the queued count. If the queued count is
2634 less than or equal to the done-count, we just ignore the call. This
2635 is needed because reading a single .o file will often replace many
2636 symtabs (one per .h file, for example), and we don't want to reset
2637 the breakpoints N times in the user's face.
2639 The reason we both queue a cleanup, and call it directly after symbol
2640 reading, is because the cleanup protects us in case of errors, but is
2641 discarded if symbol reading is successful. */
2644 /* FIXME: As free_named_symtabs is currently a big noop this function
2645 is no longer needed. */
2646 static void clear_symtab_users_once (void);
2648 static int clear_symtab_users_queued
;
2649 static int clear_symtab_users_done
;
2652 clear_symtab_users_once (void)
2654 /* Enforce once-per-`do_cleanups'-semantics */
2655 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2657 clear_symtab_users_done
= clear_symtab_users_queued
;
2659 clear_symtab_users ();
2663 /* Delete the specified psymtab, and any others that reference it. */
2666 cashier_psymtab (struct partial_symtab
*pst
)
2668 struct partial_symtab
*ps
, *pprev
= NULL
;
2671 /* Find its previous psymtab in the chain */
2672 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2681 /* Unhook it from the chain. */
2682 if (ps
== pst
->objfile
->psymtabs
)
2683 pst
->objfile
->psymtabs
= ps
->next
;
2685 pprev
->next
= ps
->next
;
2687 /* FIXME, we can't conveniently deallocate the entries in the
2688 partial_symbol lists (global_psymbols/static_psymbols) that
2689 this psymtab points to. These just take up space until all
2690 the psymtabs are reclaimed. Ditto the dependencies list and
2691 filename, which are all in the objfile_obstack. */
2693 /* We need to cashier any psymtab that has this one as a dependency... */
2695 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2697 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2699 if (ps
->dependencies
[i
] == pst
)
2701 cashier_psymtab (ps
);
2702 goto again
; /* Must restart, chain has been munged. */
2709 /* If a symtab or psymtab for filename NAME is found, free it along
2710 with any dependent breakpoints, displays, etc.
2711 Used when loading new versions of object modules with the "add-file"
2712 command. This is only called on the top-level symtab or psymtab's name;
2713 it is not called for subsidiary files such as .h files.
2715 Return value is 1 if we blew away the environment, 0 if not.
2716 FIXME. The return value appears to never be used.
2718 FIXME. I think this is not the best way to do this. We should
2719 work on being gentler to the environment while still cleaning up
2720 all stray pointers into the freed symtab. */
2723 free_named_symtabs (char *name
)
2726 /* FIXME: With the new method of each objfile having it's own
2727 psymtab list, this function needs serious rethinking. In particular,
2728 why was it ever necessary to toss psymtabs with specific compilation
2729 unit filenames, as opposed to all psymtabs from a particular symbol
2731 Well, the answer is that some systems permit reloading of particular
2732 compilation units. We want to blow away any old info about these
2733 compilation units, regardless of which objfiles they arrived in. --gnu. */
2736 struct symtab
*prev
;
2737 struct partial_symtab
*ps
;
2738 struct blockvector
*bv
;
2741 /* We only wack things if the symbol-reload switch is set. */
2742 if (!symbol_reloading
)
2745 /* Some symbol formats have trouble providing file names... */
2746 if (name
== 0 || *name
== '\0')
2749 /* Look for a psymtab with the specified name. */
2752 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2754 if (strcmp (name
, ps
->filename
) == 0)
2756 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2757 goto again2
; /* Must restart, chain has been munged */
2761 /* Look for a symtab with the specified name. */
2763 for (s
= symtab_list
; s
; s
= s
->next
)
2765 if (strcmp (name
, s
->filename
) == 0)
2772 if (s
== symtab_list
)
2773 symtab_list
= s
->next
;
2775 prev
->next
= s
->next
;
2777 /* For now, queue a delete for all breakpoints, displays, etc., whether
2778 or not they depend on the symtab being freed. This should be
2779 changed so that only those data structures affected are deleted. */
2781 /* But don't delete anything if the symtab is empty.
2782 This test is necessary due to a bug in "dbxread.c" that
2783 causes empty symtabs to be created for N_SO symbols that
2784 contain the pathname of the object file. (This problem
2785 has been fixed in GDB 3.9x). */
2787 bv
= BLOCKVECTOR (s
);
2788 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2789 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2790 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2792 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
2794 clear_symtab_users_queued
++;
2795 make_cleanup (clear_symtab_users_once
, 0);
2799 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
2806 /* It is still possible that some breakpoints will be affected
2807 even though no symtab was found, since the file might have
2808 been compiled without debugging, and hence not be associated
2809 with a symtab. In order to handle this correctly, we would need
2810 to keep a list of text address ranges for undebuggable files.
2811 For now, we do nothing, since this is a fairly obscure case. */
2815 /* FIXME, what about the minimal symbol table? */
2822 /* Allocate and partially fill a partial symtab. It will be
2823 completely filled at the end of the symbol list.
2825 FILENAME is the name of the symbol-file we are reading from. */
2827 struct partial_symtab
*
2828 start_psymtab_common (struct objfile
*objfile
,
2829 struct section_offsets
*section_offsets
, char *filename
,
2830 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2831 struct partial_symbol
**static_syms
)
2833 struct partial_symtab
*psymtab
;
2835 psymtab
= allocate_psymtab (filename
, objfile
);
2836 psymtab
->section_offsets
= section_offsets
;
2837 psymtab
->textlow
= textlow
;
2838 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2839 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2840 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2844 /* Add a symbol with a long value to a psymtab.
2845 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2846 Return the partial symbol that has been added. */
2848 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2849 symbol is so that callers can get access to the symbol's demangled
2850 name, which they don't have any cheap way to determine otherwise.
2851 (Currenly, dwarf2read.c is the only file who uses that information,
2852 though it's possible that other readers might in the future.)
2853 Elena wasn't thrilled about that, and I don't blame her, but we
2854 couldn't come up with a better way to get that information. If
2855 it's needed in other situations, we could consider breaking up
2856 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2859 const struct partial_symbol
*
2860 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2861 enum address_class
class,
2862 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2863 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2864 enum language language
, struct objfile
*objfile
)
2866 struct partial_symbol
*psym
;
2867 char *buf
= alloca (namelength
+ 1);
2868 /* psymbol is static so that there will be no uninitialized gaps in the
2869 structure which might contain random data, causing cache misses in
2871 static struct partial_symbol psymbol
;
2873 /* Create local copy of the partial symbol */
2874 memcpy (buf
, name
, namelength
);
2875 buf
[namelength
] = '\0';
2876 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2879 SYMBOL_VALUE (&psymbol
) = val
;
2883 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2885 SYMBOL_SECTION (&psymbol
) = 0;
2886 SYMBOL_LANGUAGE (&psymbol
) = language
;
2887 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2888 PSYMBOL_CLASS (&psymbol
) = class;
2890 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2892 /* Stash the partial symbol away in the cache */
2893 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2894 objfile
->psymbol_cache
);
2896 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2897 if (list
->next
>= list
->list
+ list
->size
)
2899 extend_psymbol_list (list
, objfile
);
2901 *list
->next
++ = psym
;
2902 OBJSTAT (objfile
, n_psyms
++);
2907 /* Add a symbol with a long value to a psymtab. This differs from
2908 * add_psymbol_to_list above in taking both a mangled and a demangled
2912 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2913 int dem_namelength
, domain_enum domain
,
2914 enum address_class
class,
2915 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2916 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2917 enum language language
,
2918 struct objfile
*objfile
)
2920 struct partial_symbol
*psym
;
2921 char *buf
= alloca (namelength
+ 1);
2922 /* psymbol is static so that there will be no uninitialized gaps in the
2923 structure which might contain random data, causing cache misses in
2925 static struct partial_symbol psymbol
;
2927 /* Create local copy of the partial symbol */
2929 memcpy (buf
, name
, namelength
);
2930 buf
[namelength
] = '\0';
2931 DEPRECATED_SYMBOL_NAME (&psymbol
) = deprecated_bcache (buf
, namelength
+ 1,
2932 objfile
->psymbol_cache
);
2934 buf
= alloca (dem_namelength
+ 1);
2935 memcpy (buf
, dem_name
, dem_namelength
);
2936 buf
[dem_namelength
] = '\0';
2941 case language_cplus
:
2942 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2943 deprecated_bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2945 /* FIXME What should be done for the default case? Ignoring for now. */
2948 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2951 SYMBOL_VALUE (&psymbol
) = val
;
2955 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2957 SYMBOL_SECTION (&psymbol
) = 0;
2958 SYMBOL_LANGUAGE (&psymbol
) = language
;
2959 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2960 PSYMBOL_CLASS (&psymbol
) = class;
2961 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2963 /* Stash the partial symbol away in the cache */
2964 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2965 objfile
->psymbol_cache
);
2967 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2968 if (list
->next
>= list
->list
+ list
->size
)
2970 extend_psymbol_list (list
, objfile
);
2972 *list
->next
++ = psym
;
2973 OBJSTAT (objfile
, n_psyms
++);
2976 /* Initialize storage for partial symbols. */
2979 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2981 /* Free any previously allocated psymbol lists. */
2983 if (objfile
->global_psymbols
.list
)
2985 xfree (objfile
->global_psymbols
.list
);
2987 if (objfile
->static_psymbols
.list
)
2989 xfree (objfile
->static_psymbols
.list
);
2992 /* Current best guess is that approximately a twentieth
2993 of the total symbols (in a debugging file) are global or static
2996 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2997 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2999 if (objfile
->global_psymbols
.size
> 0)
3001 objfile
->global_psymbols
.next
=
3002 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
3003 xmalloc ((objfile
->global_psymbols
.size
3004 * sizeof (struct partial_symbol
*)));
3006 if (objfile
->static_psymbols
.size
> 0)
3008 objfile
->static_psymbols
.next
=
3009 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
3010 xmalloc ((objfile
->static_psymbols
.size
3011 * sizeof (struct partial_symbol
*)));
3016 The following code implements an abstraction for debugging overlay sections.
3018 The target model is as follows:
3019 1) The gnu linker will permit multiple sections to be mapped into the
3020 same VMA, each with its own unique LMA (or load address).
3021 2) It is assumed that some runtime mechanism exists for mapping the
3022 sections, one by one, from the load address into the VMA address.
3023 3) This code provides a mechanism for gdb to keep track of which
3024 sections should be considered to be mapped from the VMA to the LMA.
3025 This information is used for symbol lookup, and memory read/write.
3026 For instance, if a section has been mapped then its contents
3027 should be read from the VMA, otherwise from the LMA.
3029 Two levels of debugger support for overlays are available. One is
3030 "manual", in which the debugger relies on the user to tell it which
3031 overlays are currently mapped. This level of support is
3032 implemented entirely in the core debugger, and the information about
3033 whether a section is mapped is kept in the objfile->obj_section table.
3035 The second level of support is "automatic", and is only available if
3036 the target-specific code provides functionality to read the target's
3037 overlay mapping table, and translate its contents for the debugger
3038 (by updating the mapped state information in the obj_section tables).
3040 The interface is as follows:
3042 overlay map <name> -- tell gdb to consider this section mapped
3043 overlay unmap <name> -- tell gdb to consider this section unmapped
3044 overlay list -- list the sections that GDB thinks are mapped
3045 overlay read-target -- get the target's state of what's mapped
3046 overlay off/manual/auto -- set overlay debugging state
3047 Functional interface:
3048 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3049 section, return that section.
3050 find_pc_overlay(pc): find any overlay section that contains
3051 the pc, either in its VMA or its LMA
3052 overlay_is_mapped(sect): true if overlay is marked as mapped
3053 section_is_overlay(sect): true if section's VMA != LMA
3054 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3055 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3056 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3057 overlay_mapped_address(...): map an address from section's LMA to VMA
3058 overlay_unmapped_address(...): map an address from section's VMA to LMA
3059 symbol_overlayed_address(...): Return a "current" address for symbol:
3060 either in VMA or LMA depending on whether
3061 the symbol's section is currently mapped
3064 /* Overlay debugging state: */
3066 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3067 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
3069 /* Target vector for refreshing overlay mapped state */
3070 static void simple_overlay_update (struct obj_section
*);
3071 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
3073 /* Function: section_is_overlay (SECTION)
3074 Returns true if SECTION has VMA not equal to LMA, ie.
3075 SECTION is loaded at an address different from where it will "run". */
3078 section_is_overlay (asection
*section
)
3080 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3082 if (overlay_debugging
)
3083 if (section
&& section
->lma
!= 0 &&
3084 section
->vma
!= section
->lma
)
3090 /* Function: overlay_invalidate_all (void)
3091 Invalidate the mapped state of all overlay sections (mark it as stale). */
3094 overlay_invalidate_all (void)
3096 struct objfile
*objfile
;
3097 struct obj_section
*sect
;
3099 ALL_OBJSECTIONS (objfile
, sect
)
3100 if (section_is_overlay (sect
->the_bfd_section
))
3101 sect
->ovly_mapped
= -1;
3104 /* Function: overlay_is_mapped (SECTION)
3105 Returns true if section is an overlay, and is currently mapped.
3106 Private: public access is thru function section_is_mapped.
3108 Access to the ovly_mapped flag is restricted to this function, so
3109 that we can do automatic update. If the global flag
3110 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3111 overlay_invalidate_all. If the mapped state of the particular
3112 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3115 overlay_is_mapped (struct obj_section
*osect
)
3117 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
3120 switch (overlay_debugging
)
3124 return 0; /* overlay debugging off */
3125 case ovly_auto
: /* overlay debugging automatic */
3126 /* Unles there is a target_overlay_update function,
3127 there's really nothing useful to do here (can't really go auto) */
3128 if (target_overlay_update
)
3130 if (overlay_cache_invalid
)
3132 overlay_invalidate_all ();
3133 overlay_cache_invalid
= 0;
3135 if (osect
->ovly_mapped
== -1)
3136 (*target_overlay_update
) (osect
);
3138 /* fall thru to manual case */
3139 case ovly_on
: /* overlay debugging manual */
3140 return osect
->ovly_mapped
== 1;
3144 /* Function: section_is_mapped
3145 Returns true if section is an overlay, and is currently mapped. */
3148 section_is_mapped (asection
*section
)
3150 struct objfile
*objfile
;
3151 struct obj_section
*osect
;
3153 if (overlay_debugging
)
3154 if (section
&& section_is_overlay (section
))
3155 ALL_OBJSECTIONS (objfile
, osect
)
3156 if (osect
->the_bfd_section
== section
)
3157 return overlay_is_mapped (osect
);
3162 /* Function: pc_in_unmapped_range
3163 If PC falls into the lma range of SECTION, return true, else false. */
3166 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
3168 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3172 if (overlay_debugging
)
3173 if (section
&& section_is_overlay (section
))
3175 size
= bfd_get_section_size (section
);
3176 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
3182 /* Function: pc_in_mapped_range
3183 If PC falls into the vma range of SECTION, return true, else false. */
3186 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
3188 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3192 if (overlay_debugging
)
3193 if (section
&& section_is_overlay (section
))
3195 size
= bfd_get_section_size (section
);
3196 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
3203 /* Return true if the mapped ranges of sections A and B overlap, false
3206 sections_overlap (asection
*a
, asection
*b
)
3208 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3210 CORE_ADDR a_start
= a
->vma
;
3211 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size (a
);
3212 CORE_ADDR b_start
= b
->vma
;
3213 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size (b
);
3215 return (a_start
< b_end
&& b_start
< a_end
);
3218 /* Function: overlay_unmapped_address (PC, SECTION)
3219 Returns the address corresponding to PC in the unmapped (load) range.
3220 May be the same as PC. */
3223 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3225 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3227 if (overlay_debugging
)
3228 if (section
&& section_is_overlay (section
) &&
3229 pc_in_mapped_range (pc
, section
))
3230 return pc
+ section
->lma
- section
->vma
;
3235 /* Function: overlay_mapped_address (PC, SECTION)
3236 Returns the address corresponding to PC in the mapped (runtime) range.
3237 May be the same as PC. */
3240 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3242 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3244 if (overlay_debugging
)
3245 if (section
&& section_is_overlay (section
) &&
3246 pc_in_unmapped_range (pc
, section
))
3247 return pc
+ section
->vma
- section
->lma
;
3253 /* Function: symbol_overlayed_address
3254 Return one of two addresses (relative to the VMA or to the LMA),
3255 depending on whether the section is mapped or not. */
3258 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3260 if (overlay_debugging
)
3262 /* If the symbol has no section, just return its regular address. */
3265 /* If the symbol's section is not an overlay, just return its address */
3266 if (!section_is_overlay (section
))
3268 /* If the symbol's section is mapped, just return its address */
3269 if (section_is_mapped (section
))
3272 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3273 * then return its LOADED address rather than its vma address!!
3275 return overlay_unmapped_address (address
, section
);
3280 /* Function: find_pc_overlay (PC)
3281 Return the best-match overlay section for PC:
3282 If PC matches a mapped overlay section's VMA, return that section.
3283 Else if PC matches an unmapped section's VMA, return that section.
3284 Else if PC matches an unmapped section's LMA, return that section. */
3287 find_pc_overlay (CORE_ADDR pc
)
3289 struct objfile
*objfile
;
3290 struct obj_section
*osect
, *best_match
= NULL
;
3292 if (overlay_debugging
)
3293 ALL_OBJSECTIONS (objfile
, osect
)
3294 if (section_is_overlay (osect
->the_bfd_section
))
3296 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3298 if (overlay_is_mapped (osect
))
3299 return osect
->the_bfd_section
;
3303 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3306 return best_match
? best_match
->the_bfd_section
: NULL
;
3309 /* Function: find_pc_mapped_section (PC)
3310 If PC falls into the VMA address range of an overlay section that is
3311 currently marked as MAPPED, return that section. Else return NULL. */
3314 find_pc_mapped_section (CORE_ADDR pc
)
3316 struct objfile
*objfile
;
3317 struct obj_section
*osect
;
3319 if (overlay_debugging
)
3320 ALL_OBJSECTIONS (objfile
, osect
)
3321 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3322 overlay_is_mapped (osect
))
3323 return osect
->the_bfd_section
;
3328 /* Function: list_overlays_command
3329 Print a list of mapped sections and their PC ranges */
3332 list_overlays_command (char *args
, int from_tty
)
3335 struct objfile
*objfile
;
3336 struct obj_section
*osect
;
3338 if (overlay_debugging
)
3339 ALL_OBJSECTIONS (objfile
, osect
)
3340 if (overlay_is_mapped (osect
))
3346 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3347 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3348 size
= bfd_get_section_size (osect
->the_bfd_section
);
3349 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3351 printf_filtered ("Section %s, loaded at ", name
);
3352 deprecated_print_address_numeric (lma
, 1, gdb_stdout
);
3353 puts_filtered (" - ");
3354 deprecated_print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3355 printf_filtered (", mapped at ");
3356 deprecated_print_address_numeric (vma
, 1, gdb_stdout
);
3357 puts_filtered (" - ");
3358 deprecated_print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3359 puts_filtered ("\n");
3364 printf_filtered (_("No sections are mapped.\n"));
3367 /* Function: map_overlay_command
3368 Mark the named section as mapped (ie. residing at its VMA address). */
3371 map_overlay_command (char *args
, int from_tty
)
3373 struct objfile
*objfile
, *objfile2
;
3374 struct obj_section
*sec
, *sec2
;
3377 if (!overlay_debugging
)
3379 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3380 the 'overlay manual' command."));
3382 if (args
== 0 || *args
== 0)
3383 error (_("Argument required: name of an overlay section"));
3385 /* First, find a section matching the user supplied argument */
3386 ALL_OBJSECTIONS (objfile
, sec
)
3387 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3389 /* Now, check to see if the section is an overlay. */
3390 bfdsec
= sec
->the_bfd_section
;
3391 if (!section_is_overlay (bfdsec
))
3392 continue; /* not an overlay section */
3394 /* Mark the overlay as "mapped" */
3395 sec
->ovly_mapped
= 1;
3397 /* Next, make a pass and unmap any sections that are
3398 overlapped by this new section: */
3399 ALL_OBJSECTIONS (objfile2
, sec2
)
3400 if (sec2
->ovly_mapped
3402 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3403 && sections_overlap (sec
->the_bfd_section
,
3404 sec2
->the_bfd_section
))
3407 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3408 bfd_section_name (objfile
->obfd
,
3409 sec2
->the_bfd_section
));
3410 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3414 error (_("No overlay section called %s"), args
);
3417 /* Function: unmap_overlay_command
3418 Mark the overlay section as unmapped
3419 (ie. resident in its LMA address range, rather than the VMA range). */
3422 unmap_overlay_command (char *args
, int from_tty
)
3424 struct objfile
*objfile
;
3425 struct obj_section
*sec
;
3427 if (!overlay_debugging
)
3429 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3430 the 'overlay manual' command."));
3432 if (args
== 0 || *args
== 0)
3433 error (_("Argument required: name of an overlay section"));
3435 /* First, find a section matching the user supplied argument */
3436 ALL_OBJSECTIONS (objfile
, sec
)
3437 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3439 if (!sec
->ovly_mapped
)
3440 error (_("Section %s is not mapped"), args
);
3441 sec
->ovly_mapped
= 0;
3444 error (_("No overlay section called %s"), args
);
3447 /* Function: overlay_auto_command
3448 A utility command to turn on overlay debugging.
3449 Possibly this should be done via a set/show command. */
3452 overlay_auto_command (char *args
, int from_tty
)
3454 overlay_debugging
= ovly_auto
;
3455 enable_overlay_breakpoints ();
3457 printf_unfiltered (_("Automatic overlay debugging enabled."));
3460 /* Function: overlay_manual_command
3461 A utility command to turn on overlay debugging.
3462 Possibly this should be done via a set/show command. */
3465 overlay_manual_command (char *args
, int from_tty
)
3467 overlay_debugging
= ovly_on
;
3468 disable_overlay_breakpoints ();
3470 printf_unfiltered (_("Overlay debugging enabled."));
3473 /* Function: overlay_off_command
3474 A utility command to turn on overlay debugging.
3475 Possibly this should be done via a set/show command. */
3478 overlay_off_command (char *args
, int from_tty
)
3480 overlay_debugging
= ovly_off
;
3481 disable_overlay_breakpoints ();
3483 printf_unfiltered (_("Overlay debugging disabled."));
3487 overlay_load_command (char *args
, int from_tty
)
3489 if (target_overlay_update
)
3490 (*target_overlay_update
) (NULL
);
3492 error (_("This target does not know how to read its overlay state."));
3495 /* Function: overlay_command
3496 A place-holder for a mis-typed command */
3498 /* Command list chain containing all defined "overlay" subcommands. */
3499 struct cmd_list_element
*overlaylist
;
3502 overlay_command (char *args
, int from_tty
)
3505 ("\"overlay\" must be followed by the name of an overlay command.\n");
3506 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3510 /* Target Overlays for the "Simplest" overlay manager:
3512 This is GDB's default target overlay layer. It works with the
3513 minimal overlay manager supplied as an example by Cygnus. The
3514 entry point is via a function pointer "target_overlay_update",
3515 so targets that use a different runtime overlay manager can
3516 substitute their own overlay_update function and take over the
3519 The overlay_update function pokes around in the target's data structures
3520 to see what overlays are mapped, and updates GDB's overlay mapping with
3523 In this simple implementation, the target data structures are as follows:
3524 unsigned _novlys; /# number of overlay sections #/
3525 unsigned _ovly_table[_novlys][4] = {
3526 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3527 {..., ..., ..., ...},
3529 unsigned _novly_regions; /# number of overlay regions #/
3530 unsigned _ovly_region_table[_novly_regions][3] = {
3531 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3534 These functions will attempt to update GDB's mappedness state in the
3535 symbol section table, based on the target's mappedness state.
3537 To do this, we keep a cached copy of the target's _ovly_table, and
3538 attempt to detect when the cached copy is invalidated. The main
3539 entry point is "simple_overlay_update(SECT), which looks up SECT in
3540 the cached table and re-reads only the entry for that section from
3541 the target (whenever possible).
3544 /* Cached, dynamically allocated copies of the target data structures: */
3545 static unsigned (*cache_ovly_table
)[4] = 0;
3547 static unsigned (*cache_ovly_region_table
)[3] = 0;
3549 static unsigned cache_novlys
= 0;
3551 static unsigned cache_novly_regions
= 0;
3553 static CORE_ADDR cache_ovly_table_base
= 0;
3555 static CORE_ADDR cache_ovly_region_table_base
= 0;
3559 VMA
, SIZE
, LMA
, MAPPED
3561 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3563 /* Throw away the cached copy of _ovly_table */
3565 simple_free_overlay_table (void)
3567 if (cache_ovly_table
)
3568 xfree (cache_ovly_table
);
3570 cache_ovly_table
= NULL
;
3571 cache_ovly_table_base
= 0;
3575 /* Throw away the cached copy of _ovly_region_table */
3577 simple_free_overlay_region_table (void)
3579 if (cache_ovly_region_table
)
3580 xfree (cache_ovly_region_table
);
3581 cache_novly_regions
= 0;
3582 cache_ovly_region_table
= NULL
;
3583 cache_ovly_region_table_base
= 0;
3587 /* Read an array of ints from the target into a local buffer.
3588 Convert to host order. int LEN is number of ints */
3590 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3592 /* FIXME (alloca): Not safe if array is very large. */
3593 gdb_byte
*buf
= alloca (len
* TARGET_LONG_BYTES
);
3596 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3597 for (i
= 0; i
< len
; i
++)
3598 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3602 /* Find and grab a copy of the target _ovly_table
3603 (and _novlys, which is needed for the table's size) */
3605 simple_read_overlay_table (void)
3607 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3609 simple_free_overlay_table ();
3610 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3613 error (_("Error reading inferior's overlay table: "
3614 "couldn't find `_novlys' variable\n"
3615 "in inferior. Use `overlay manual' mode."));
3619 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3620 if (! ovly_table_msym
)
3622 error (_("Error reading inferior's overlay table: couldn't find "
3623 "`_ovly_table' array\n"
3624 "in inferior. Use `overlay manual' mode."));
3628 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3630 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3631 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3632 read_target_long_array (cache_ovly_table_base
,
3633 (unsigned int *) cache_ovly_table
,
3636 return 1; /* SUCCESS */
3640 /* Find and grab a copy of the target _ovly_region_table
3641 (and _novly_regions, which is needed for the table's size) */
3643 simple_read_overlay_region_table (void)
3645 struct minimal_symbol
*msym
;
3647 simple_free_overlay_region_table ();
3648 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3650 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3652 return 0; /* failure */
3653 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3654 if (cache_ovly_region_table
!= NULL
)
3656 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3659 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3660 read_target_long_array (cache_ovly_region_table_base
,
3661 (unsigned int *) cache_ovly_region_table
,
3662 cache_novly_regions
* 3);
3665 return 0; /* failure */
3668 return 0; /* failure */
3669 return 1; /* SUCCESS */
3673 /* Function: simple_overlay_update_1
3674 A helper function for simple_overlay_update. Assuming a cached copy
3675 of _ovly_table exists, look through it to find an entry whose vma,
3676 lma and size match those of OSECT. Re-read the entry and make sure
3677 it still matches OSECT (else the table may no longer be valid).
3678 Set OSECT's mapped state to match the entry. Return: 1 for
3679 success, 0 for failure. */
3682 simple_overlay_update_1 (struct obj_section
*osect
)
3685 bfd
*obfd
= osect
->objfile
->obfd
;
3686 asection
*bsect
= osect
->the_bfd_section
;
3688 size
= bfd_get_section_size (osect
->the_bfd_section
);
3689 for (i
= 0; i
< cache_novlys
; i
++)
3690 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3691 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3692 /* && cache_ovly_table[i][SIZE] == size */ )
3694 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3695 (unsigned int *) cache_ovly_table
[i
], 4);
3696 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3697 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3698 /* && cache_ovly_table[i][SIZE] == size */ )
3700 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3703 else /* Warning! Warning! Target's ovly table has changed! */
3709 /* Function: simple_overlay_update
3710 If OSECT is NULL, then update all sections' mapped state
3711 (after re-reading the entire target _ovly_table).
3712 If OSECT is non-NULL, then try to find a matching entry in the
3713 cached ovly_table and update only OSECT's mapped state.
3714 If a cached entry can't be found or the cache isn't valid, then
3715 re-read the entire cache, and go ahead and update all sections. */
3718 simple_overlay_update (struct obj_section
*osect
)
3720 struct objfile
*objfile
;
3722 /* Were we given an osect to look up? NULL means do all of them. */
3724 /* Have we got a cached copy of the target's overlay table? */
3725 if (cache_ovly_table
!= NULL
)
3726 /* Does its cached location match what's currently in the symtab? */
3727 if (cache_ovly_table_base
==
3728 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3729 /* Then go ahead and try to look up this single section in the cache */
3730 if (simple_overlay_update_1 (osect
))
3731 /* Found it! We're done. */
3734 /* Cached table no good: need to read the entire table anew.
3735 Or else we want all the sections, in which case it's actually
3736 more efficient to read the whole table in one block anyway. */
3738 if (! simple_read_overlay_table ())
3741 /* Now may as well update all sections, even if only one was requested. */
3742 ALL_OBJSECTIONS (objfile
, osect
)
3743 if (section_is_overlay (osect
->the_bfd_section
))
3746 bfd
*obfd
= osect
->objfile
->obfd
;
3747 asection
*bsect
= osect
->the_bfd_section
;
3749 size
= bfd_get_section_size (bsect
);
3750 for (i
= 0; i
< cache_novlys
; i
++)
3751 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3752 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3753 /* && cache_ovly_table[i][SIZE] == size */ )
3754 { /* obj_section matches i'th entry in ovly_table */
3755 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3756 break; /* finished with inner for loop: break out */
3761 /* Set the output sections and output offsets for section SECTP in
3762 ABFD. The relocation code in BFD will read these offsets, so we
3763 need to be sure they're initialized. We map each section to itself,
3764 with no offset; this means that SECTP->vma will be honored. */
3767 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3769 sectp
->output_section
= sectp
;
3770 sectp
->output_offset
= 0;
3773 /* Relocate the contents of a debug section SECTP in ABFD. The
3774 contents are stored in BUF if it is non-NULL, or returned in a
3775 malloc'd buffer otherwise.
3777 For some platforms and debug info formats, shared libraries contain
3778 relocations against the debug sections (particularly for DWARF-2;
3779 one affected platform is PowerPC GNU/Linux, although it depends on
3780 the version of the linker in use). Also, ELF object files naturally
3781 have unresolved relocations for their debug sections. We need to apply
3782 the relocations in order to get the locations of symbols correct. */
3785 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3787 /* We're only interested in debugging sections with relocation
3789 if ((sectp
->flags
& SEC_RELOC
) == 0)
3791 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3794 /* We will handle section offsets properly elsewhere, so relocate as if
3795 all sections begin at 0. */
3796 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3798 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3802 _initialize_symfile (void)
3804 struct cmd_list_element
*c
;
3806 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3807 Load symbol table from executable file FILE.\n\
3808 The `file' command can also load symbol tables, as well as setting the file\n\
3809 to execute."), &cmdlist
);
3810 set_cmd_completer (c
, filename_completer
);
3812 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3813 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3814 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3815 ADDR is the starting address of the file's text.\n\
3816 The optional arguments are section-name section-address pairs and\n\
3817 should be specified if the data and bss segments are not contiguous\n\
3818 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3820 set_cmd_completer (c
, filename_completer
);
3822 c
= add_cmd ("add-shared-symbol-files", class_files
,
3823 add_shared_symbol_files_command
, _("\
3824 Load the symbols from shared objects in the dynamic linker's link map."),
3826 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3829 c
= add_cmd ("load", class_files
, load_command
, _("\
3830 Dynamically load FILE into the running program, and record its symbols\n\
3831 for access from GDB.\n\
3832 A load OFFSET may also be given."), &cmdlist
);
3833 set_cmd_completer (c
, filename_completer
);
3835 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3836 &symbol_reloading
, _("\
3837 Set dynamic symbol table reloading multiple times in one run."), _("\
3838 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3840 show_symbol_reloading
,
3841 &setlist
, &showlist
);
3843 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3844 _("Commands for debugging overlays."), &overlaylist
,
3845 "overlay ", 0, &cmdlist
);
3847 add_com_alias ("ovly", "overlay", class_alias
, 1);
3848 add_com_alias ("ov", "overlay", class_alias
, 1);
3850 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3851 _("Assert that an overlay section is mapped."), &overlaylist
);
3853 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3854 _("Assert that an overlay section is unmapped."), &overlaylist
);
3856 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3857 _("List mappings of overlay sections."), &overlaylist
);
3859 add_cmd ("manual", class_support
, overlay_manual_command
,
3860 _("Enable overlay debugging."), &overlaylist
);
3861 add_cmd ("off", class_support
, overlay_off_command
,
3862 _("Disable overlay debugging."), &overlaylist
);
3863 add_cmd ("auto", class_support
, overlay_auto_command
,
3864 _("Enable automatic overlay debugging."), &overlaylist
);
3865 add_cmd ("load-target", class_support
, overlay_load_command
,
3866 _("Read the overlay mapping state from the target."), &overlaylist
);
3868 /* Filename extension to source language lookup table: */
3869 init_filename_language_table ();
3870 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3872 Set mapping between filename extension and source language."), _("\
3873 Show mapping between filename extension and source language."), _("\
3874 Usage: set extension-language .foo bar"),
3875 set_ext_lang_command
,
3877 &setlist
, &showlist
);
3879 add_info ("extensions", info_ext_lang_command
,
3880 _("All filename extensions associated with a source language."));
3882 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3883 &debug_file_directory
, _("\
3884 Set the directory where separate debug symbols are searched for."), _("\
3885 Show the directory where separate debug symbols are searched for."), _("\
3886 Separate debug symbols are first searched for in the same\n\
3887 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3888 and lastly at the path of the directory of the binary with\n\
3889 the global debug-file directory prepended."),
3891 show_debug_file_directory
,
3892 &setlist
, &showlist
);