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"
56 #include <sys/types.h>
58 #include "gdb_string.h"
65 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
66 void (*deprecated_show_load_progress
) (const char *section
,
67 unsigned long section_sent
,
68 unsigned long section_size
,
69 unsigned long total_sent
,
70 unsigned long total_size
);
71 void (*deprecated_pre_add_symbol_hook
) (const char *);
72 void (*deprecated_post_add_symbol_hook
) (void);
73 void (*deprecated_target_new_objfile_hook
) (struct objfile
*);
75 static void clear_symtab_users_cleanup (void *ignore
);
77 /* Global variables owned by this file */
78 int readnow_symbol_files
; /* Read full symbols immediately */
80 /* External variables and functions referenced. */
82 extern void report_transfer_performance (unsigned long, time_t, time_t);
84 /* Functions this file defines */
87 static int simple_read_overlay_region_table (void);
88 static void simple_free_overlay_region_table (void);
91 static void set_initial_language (void);
93 static void load_command (char *, int);
95 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
97 static void add_symbol_file_command (char *, int);
99 static void add_shared_symbol_files_command (char *, int);
101 static void reread_separate_symbols (struct objfile
*objfile
);
103 static void cashier_psymtab (struct partial_symtab
*);
105 bfd
*symfile_bfd_open (char *);
107 int get_section_index (struct objfile
*, char *);
109 static void find_sym_fns (struct objfile
*);
111 static void decrement_reading_symtab (void *);
113 static void overlay_invalidate_all (void);
115 static int overlay_is_mapped (struct obj_section
*);
117 void list_overlays_command (char *, int);
119 void map_overlay_command (char *, int);
121 void unmap_overlay_command (char *, int);
123 static void overlay_auto_command (char *, int);
125 static void overlay_manual_command (char *, int);
127 static void overlay_off_command (char *, int);
129 static void overlay_load_command (char *, int);
131 static void overlay_command (char *, int);
133 static void simple_free_overlay_table (void);
135 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
137 static int simple_read_overlay_table (void);
139 static int simple_overlay_update_1 (struct obj_section
*);
141 static void add_filename_language (char *ext
, enum language lang
);
143 static void info_ext_lang_command (char *args
, int from_tty
);
145 static char *find_separate_debug_file (struct objfile
*objfile
);
147 static void init_filename_language_table (void);
149 void _initialize_symfile (void);
151 /* List of all available sym_fns. On gdb startup, each object file reader
152 calls add_symtab_fns() to register information on each format it is
155 static struct sym_fns
*symtab_fns
= NULL
;
157 /* Flag for whether user will be reloading symbols multiple times.
158 Defaults to ON for VxWorks, otherwise OFF. */
160 #ifdef SYMBOL_RELOADING_DEFAULT
161 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
163 int symbol_reloading
= 0;
166 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
167 struct cmd_list_element
*c
, const char *value
)
169 fprintf_filtered (file
, _("\
170 Dynamic symbol table reloading multiple times in one run is %s.\n"),
175 /* If non-zero, shared library symbols will be added automatically
176 when the inferior is created, new libraries are loaded, or when
177 attaching to the inferior. This is almost always what users will
178 want to have happen; but for very large programs, the startup time
179 will be excessive, and so if this is a problem, the user can clear
180 this flag and then add the shared library symbols as needed. Note
181 that there is a potential for confusion, since if the shared
182 library symbols are not loaded, commands like "info fun" will *not*
183 report all the functions that are actually present. */
185 int auto_solib_add
= 1;
187 /* For systems that support it, a threshold size in megabytes. If
188 automatically adding a new library's symbol table to those already
189 known to the debugger would cause the total shared library symbol
190 size to exceed this threshhold, then the shlib's symbols are not
191 added. The threshold is ignored if the user explicitly asks for a
192 shlib to be added, such as when using the "sharedlibrary"
195 int auto_solib_limit
;
198 /* This compares two partial symbols by names, using strcmp_iw_ordered
199 for the comparison. */
202 compare_psymbols (const void *s1p
, const void *s2p
)
204 struct partial_symbol
*const *s1
= s1p
;
205 struct partial_symbol
*const *s2
= s2p
;
207 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
208 SYMBOL_SEARCH_NAME (*s2
));
212 sort_pst_symbols (struct partial_symtab
*pst
)
214 /* Sort the global list; don't sort the static list */
216 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
217 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
221 /* Make a null terminated copy of the string at PTR with SIZE characters in
222 the obstack pointed to by OBSTACKP . Returns the address of the copy.
223 Note that the string at PTR does not have to be null terminated, I.E. it
224 may be part of a larger string and we are only saving a substring. */
227 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
229 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
230 /* Open-coded memcpy--saves function call time. These strings are usually
231 short. FIXME: Is this really still true with a compiler that can
234 const char *p1
= ptr
;
236 const char *end
= ptr
+ size
;
244 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
245 in the obstack pointed to by OBSTACKP. */
248 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
251 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
252 char *val
= (char *) obstack_alloc (obstackp
, len
);
259 /* True if we are nested inside psymtab_to_symtab. */
261 int currently_reading_symtab
= 0;
264 decrement_reading_symtab (void *dummy
)
266 currently_reading_symtab
--;
269 /* Get the symbol table that corresponds to a partial_symtab.
270 This is fast after the first time you do it. In fact, there
271 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
275 psymtab_to_symtab (struct partial_symtab
*pst
)
277 /* If it's been looked up before, return it. */
281 /* If it has not yet been read in, read it. */
284 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
285 currently_reading_symtab
++;
286 (*pst
->read_symtab
) (pst
);
287 do_cleanups (back_to
);
293 /* Remember the lowest-addressed loadable section we've seen.
294 This function is called via bfd_map_over_sections.
296 In case of equal vmas, the section with the largest size becomes the
297 lowest-addressed loadable section.
299 If the vmas and sizes are equal, the last section is considered the
300 lowest-addressed loadable section. */
303 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
305 asection
**lowest
= (asection
**) obj
;
307 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
310 *lowest
= sect
; /* First loadable section */
311 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
312 *lowest
= sect
; /* A lower loadable section */
313 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
314 && (bfd_section_size (abfd
, (*lowest
))
315 <= bfd_section_size (abfd
, sect
)))
319 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
321 struct section_addr_info
*
322 alloc_section_addr_info (size_t num_sections
)
324 struct section_addr_info
*sap
;
327 size
= (sizeof (struct section_addr_info
)
328 + sizeof (struct other_sections
) * (num_sections
- 1));
329 sap
= (struct section_addr_info
*) xmalloc (size
);
330 memset (sap
, 0, size
);
331 sap
->num_sections
= num_sections
;
337 /* Return a freshly allocated copy of ADDRS. The section names, if
338 any, are also freshly allocated copies of those in ADDRS. */
339 struct section_addr_info
*
340 copy_section_addr_info (struct section_addr_info
*addrs
)
342 struct section_addr_info
*copy
343 = alloc_section_addr_info (addrs
->num_sections
);
346 copy
->num_sections
= addrs
->num_sections
;
347 for (i
= 0; i
< addrs
->num_sections
; i
++)
349 copy
->other
[i
].addr
= addrs
->other
[i
].addr
;
350 if (addrs
->other
[i
].name
)
351 copy
->other
[i
].name
= xstrdup (addrs
->other
[i
].name
);
353 copy
->other
[i
].name
= NULL
;
354 copy
->other
[i
].sectindex
= addrs
->other
[i
].sectindex
;
362 /* Build (allocate and populate) a section_addr_info struct from
363 an existing section table. */
365 extern struct section_addr_info
*
366 build_section_addr_info_from_section_table (const struct section_table
*start
,
367 const struct section_table
*end
)
369 struct section_addr_info
*sap
;
370 const struct section_table
*stp
;
373 sap
= alloc_section_addr_info (end
- start
);
375 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
377 if (bfd_get_section_flags (stp
->bfd
,
378 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
379 && oidx
< end
- start
)
381 sap
->other
[oidx
].addr
= stp
->addr
;
382 sap
->other
[oidx
].name
383 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
384 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
393 /* Free all memory allocated by build_section_addr_info_from_section_table. */
396 free_section_addr_info (struct section_addr_info
*sap
)
400 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
401 if (sap
->other
[idx
].name
)
402 xfree (sap
->other
[idx
].name
);
407 /* Initialize OBJFILE's sect_index_* members. */
409 init_objfile_sect_indices (struct objfile
*objfile
)
414 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
416 objfile
->sect_index_text
= sect
->index
;
418 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
420 objfile
->sect_index_data
= sect
->index
;
422 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
424 objfile
->sect_index_bss
= sect
->index
;
426 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
428 objfile
->sect_index_rodata
= sect
->index
;
430 /* This is where things get really weird... We MUST have valid
431 indices for the various sect_index_* members or gdb will abort.
432 So if for example, there is no ".text" section, we have to
433 accomodate that. Except when explicitly adding symbol files at
434 some address, section_offsets contains nothing but zeros, so it
435 doesn't matter which slot in section_offsets the individual
436 sect_index_* members index into. So if they are all zero, it is
437 safe to just point all the currently uninitialized indices to the
440 for (i
= 0; i
< objfile
->num_sections
; i
++)
442 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
447 if (i
== objfile
->num_sections
)
449 if (objfile
->sect_index_text
== -1)
450 objfile
->sect_index_text
= 0;
451 if (objfile
->sect_index_data
== -1)
452 objfile
->sect_index_data
= 0;
453 if (objfile
->sect_index_bss
== -1)
454 objfile
->sect_index_bss
= 0;
455 if (objfile
->sect_index_rodata
== -1)
456 objfile
->sect_index_rodata
= 0;
460 /* The arguments to place_section. */
462 struct place_section_arg
464 struct section_offsets
*offsets
;
468 /* Find a unique offset to use for loadable section SECT if
469 the user did not provide an offset. */
472 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
474 struct place_section_arg
*arg
= obj
;
475 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
477 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
479 /* We are only interested in loadable sections. */
480 if ((bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
) == 0)
483 /* If the user specified an offset, honor it. */
484 if (offsets
[sect
->index
] != 0)
487 /* Otherwise, let's try to find a place for the section. */
488 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
495 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
497 int indx
= cur_sec
->index
;
498 CORE_ADDR cur_offset
;
500 /* We don't need to compare against ourself. */
504 /* We can only conflict with loadable sections. */
505 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_LOAD
) == 0)
508 /* We do not expect this to happen; just ignore sections in a
509 relocatable file with an assigned VMA. */
510 if (bfd_section_vma (abfd
, cur_sec
) != 0)
513 /* If the section offset is 0, either the section has not been placed
514 yet, or it was the lowest section placed (in which case LOWEST
515 will be past its end). */
516 if (offsets
[indx
] == 0)
519 /* If this section would overlap us, then we must move up. */
520 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
521 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
523 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
524 start_addr
= (start_addr
+ align
- 1) & -align
;
529 /* Otherwise, we appear to be OK. So far. */
534 offsets
[sect
->index
] = start_addr
;
535 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
537 exec_set_section_address (bfd_get_filename (abfd
), sect
->index
, start_addr
);
540 /* Parse the user's idea of an offset for dynamic linking, into our idea
541 of how to represent it for fast symbol reading. This is the default
542 version of the sym_fns.sym_offsets function for symbol readers that
543 don't need to do anything special. It allocates a section_offsets table
544 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
547 default_symfile_offsets (struct objfile
*objfile
,
548 struct section_addr_info
*addrs
)
552 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
553 objfile
->section_offsets
= (struct section_offsets
*)
554 obstack_alloc (&objfile
->objfile_obstack
,
555 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
556 memset (objfile
->section_offsets
, 0,
557 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
559 /* Now calculate offsets for section that were specified by the
561 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
563 struct other_sections
*osp
;
565 osp
= &addrs
->other
[i
] ;
569 /* Record all sections in offsets */
570 /* The section_offsets in the objfile are here filled in using
572 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
575 /* For relocatable files, all loadable sections will start at zero.
576 The zero is meaningless, so try to pick arbitrary addresses such
577 that no loadable sections overlap. This algorithm is quadratic,
578 but the number of sections in a single object file is generally
580 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
582 struct place_section_arg arg
;
583 arg
.offsets
= objfile
->section_offsets
;
585 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
588 /* Remember the bfd indexes for the .text, .data, .bss and
590 init_objfile_sect_indices (objfile
);
594 /* Process a symbol file, as either the main file or as a dynamically
597 OBJFILE is where the symbols are to be read from.
599 ADDRS is the list of section load addresses. If the user has given
600 an 'add-symbol-file' command, then this is the list of offsets and
601 addresses he or she provided as arguments to the command; or, if
602 we're handling a shared library, these are the actual addresses the
603 sections are loaded at, according to the inferior's dynamic linker
604 (as gleaned by GDB's shared library code). We convert each address
605 into an offset from the section VMA's as it appears in the object
606 file, and then call the file's sym_offsets function to convert this
607 into a format-specific offset table --- a `struct section_offsets'.
608 If ADDRS is non-zero, OFFSETS must be zero.
610 OFFSETS is a table of section offsets already in the right
611 format-specific representation. NUM_OFFSETS is the number of
612 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
613 assume this is the proper table the call to sym_offsets described
614 above would produce. Instead of calling sym_offsets, we just dump
615 it right into objfile->section_offsets. (When we're re-reading
616 symbols from an objfile, we don't have the original load address
617 list any more; all we have is the section offset table.) If
618 OFFSETS is non-zero, ADDRS must be zero.
620 MAINLINE is nonzero if this is the main symbol file, or zero if
621 it's an extra symbol file such as dynamically loaded code.
623 VERBO is nonzero if the caller has printed a verbose message about
624 the symbol reading (and complaints can be more terse about it). */
627 syms_from_objfile (struct objfile
*objfile
,
628 struct section_addr_info
*addrs
,
629 struct section_offsets
*offsets
,
634 struct section_addr_info
*local_addr
= NULL
;
635 struct cleanup
*old_chain
;
637 gdb_assert (! (addrs
&& offsets
));
639 init_entry_point_info (objfile
);
640 find_sym_fns (objfile
);
642 if (objfile
->sf
== NULL
)
643 return; /* No symbols. */
645 /* Make sure that partially constructed symbol tables will be cleaned up
646 if an error occurs during symbol reading. */
647 old_chain
= make_cleanup_free_objfile (objfile
);
649 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
650 list. We now establish the convention that an addr of zero means
651 no load address was specified. */
652 if (! addrs
&& ! offsets
)
655 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
656 make_cleanup (xfree
, local_addr
);
660 /* Now either addrs or offsets is non-zero. */
664 /* We will modify the main symbol table, make sure that all its users
665 will be cleaned up if an error occurs during symbol reading. */
666 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
668 /* Since no error yet, throw away the old symbol table. */
670 if (symfile_objfile
!= NULL
)
672 free_objfile (symfile_objfile
);
673 symfile_objfile
= NULL
;
676 /* Currently we keep symbols from the add-symbol-file command.
677 If the user wants to get rid of them, they should do "symbol-file"
678 without arguments first. Not sure this is the best behavior
681 (*objfile
->sf
->sym_new_init
) (objfile
);
684 /* Convert addr into an offset rather than an absolute address.
685 We find the lowest address of a loaded segment in the objfile,
686 and assume that <addr> is where that got loaded.
688 We no longer warn if the lowest section is not a text segment (as
689 happens for the PA64 port. */
690 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
692 asection
*lower_sect
;
694 CORE_ADDR lower_offset
;
697 /* Find lowest loadable section to be used as starting point for
698 continguous sections. FIXME!! won't work without call to find
699 .text first, but this assumes text is lowest section. */
700 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
701 if (lower_sect
== NULL
)
702 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
704 if (lower_sect
== NULL
)
705 warning (_("no loadable sections found in added symbol-file %s"),
708 if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
) == 0)
709 warning (_("Lowest section in %s is %s at %s"),
711 bfd_section_name (objfile
->obfd
, lower_sect
),
712 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
713 if (lower_sect
!= NULL
)
714 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
718 /* Calculate offsets for the loadable sections.
719 FIXME! Sections must be in order of increasing loadable section
720 so that contiguous sections can use the lower-offset!!!
722 Adjust offsets if the segments are not contiguous.
723 If the section is contiguous, its offset should be set to
724 the offset of the highest loadable section lower than it
725 (the loadable section directly below it in memory).
726 this_offset = lower_offset = lower_addr - lower_orig_addr */
728 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
730 if (addrs
->other
[i
].addr
!= 0)
732 sect
= bfd_get_section_by_name (objfile
->obfd
,
733 addrs
->other
[i
].name
);
737 -= bfd_section_vma (objfile
->obfd
, sect
);
738 lower_offset
= addrs
->other
[i
].addr
;
739 /* This is the index used by BFD. */
740 addrs
->other
[i
].sectindex
= sect
->index
;
744 warning (_("section %s not found in %s"),
745 addrs
->other
[i
].name
,
747 addrs
->other
[i
].addr
= 0;
751 addrs
->other
[i
].addr
= lower_offset
;
755 /* Initialize symbol reading routines for this objfile, allow complaints to
756 appear for this new file, and record how verbose to be, then do the
757 initial symbol reading for this file. */
759 (*objfile
->sf
->sym_init
) (objfile
);
760 clear_complaints (&symfile_complaints
, 1, verbo
);
763 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
766 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
768 /* Just copy in the offset table directly as given to us. */
769 objfile
->num_sections
= num_offsets
;
770 objfile
->section_offsets
771 = ((struct section_offsets
*)
772 obstack_alloc (&objfile
->objfile_obstack
, size
));
773 memcpy (objfile
->section_offsets
, offsets
, size
);
775 init_objfile_sect_indices (objfile
);
778 #ifndef DEPRECATED_IBM6000_TARGET
779 /* This is a SVR4/SunOS specific hack, I think. In any event, it
780 screws RS/6000. sym_offsets should be doing this sort of thing,
781 because it knows the mapping between bfd sections and
783 /* This is a hack. As far as I can tell, section offsets are not
784 target dependent. They are all set to addr with a couple of
785 exceptions. The exceptions are sysvr4 shared libraries, whose
786 offsets are kept in solib structures anyway and rs6000 xcoff
787 which handles shared libraries in a completely unique way.
789 Section offsets are built similarly, except that they are built
790 by adding addr in all cases because there is no clear mapping
791 from section_offsets into actual sections. Note that solib.c
792 has a different algorithm for finding section offsets.
794 These should probably all be collapsed into some target
795 independent form of shared library support. FIXME. */
799 struct obj_section
*s
;
801 /* Map section offsets in "addr" back to the object's
802 sections by comparing the section names with bfd's
803 section names. Then adjust the section address by
804 the offset. */ /* for gdb/13815 */
806 ALL_OBJFILE_OSECTIONS (objfile
, s
)
808 CORE_ADDR s_addr
= 0;
812 !s_addr
&& i
< addrs
->num_sections
&& addrs
->other
[i
].name
;
814 if (strcmp (bfd_section_name (s
->objfile
->obfd
,
816 addrs
->other
[i
].name
) == 0)
817 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
819 s
->addr
-= s
->offset
;
821 s
->endaddr
-= s
->offset
;
822 s
->endaddr
+= s_addr
;
826 #endif /* not DEPRECATED_IBM6000_TARGET */
828 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
830 /* Don't allow char * to have a typename (else would get caddr_t).
831 Ditto void *. FIXME: Check whether this is now done by all the
832 symbol readers themselves (many of them now do), and if so remove
835 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
836 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
838 /* Mark the objfile has having had initial symbol read attempted. Note
839 that this does not mean we found any symbols... */
841 objfile
->flags
|= OBJF_SYMS
;
843 /* Discard cleanups as symbol reading was successful. */
845 discard_cleanups (old_chain
);
848 /* Perform required actions after either reading in the initial
849 symbols for a new objfile, or mapping in the symbols from a reusable
853 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
856 /* If this is the main symbol file we have to clean up all users of the
857 old main symbol file. Otherwise it is sufficient to fixup all the
858 breakpoints that may have been redefined by this symbol file. */
861 /* OK, make it the "real" symbol file. */
862 symfile_objfile
= objfile
;
864 clear_symtab_users ();
868 breakpoint_re_set ();
871 /* We're done reading the symbol file; finish off complaints. */
872 clear_complaints (&symfile_complaints
, 0, verbo
);
875 /* Process a symbol file, as either the main file or as a dynamically
878 ABFD is a BFD already open on the file, as from symfile_bfd_open.
879 This BFD will be closed on error, and is always consumed by this function.
881 FROM_TTY says how verbose to be.
883 MAINLINE specifies whether this is the main symbol file, or whether
884 it's an extra symbol file such as dynamically loaded code.
886 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
887 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
890 Upon success, returns a pointer to the objfile that was added.
891 Upon failure, jumps back to command level (never returns). */
892 static struct objfile
*
893 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
, int from_tty
,
894 struct section_addr_info
*addrs
,
895 struct section_offsets
*offsets
,
897 int mainline
, int flags
)
899 struct objfile
*objfile
;
900 struct partial_symtab
*psymtab
;
902 struct section_addr_info
*orig_addrs
= NULL
;
903 struct cleanup
*my_cleanups
;
904 const char *name
= bfd_get_filename (abfd
);
906 my_cleanups
= make_cleanup_bfd_close (abfd
);
908 /* Give user a chance to burp if we'd be
909 interactively wiping out any existing symbols. */
911 if ((have_full_symbols () || have_partial_symbols ())
914 && !query ("Load new symbol table from \"%s\"? ", name
))
915 error (_("Not confirmed."));
917 objfile
= allocate_objfile (abfd
, flags
);
918 discard_cleanups (my_cleanups
);
922 orig_addrs
= copy_section_addr_info (addrs
);
923 make_cleanup_free_section_addr_info (orig_addrs
);
926 /* We either created a new mapped symbol table, mapped an existing
927 symbol table file which has not had initial symbol reading
928 performed, or need to read an unmapped symbol table. */
929 if (from_tty
|| info_verbose
)
931 if (deprecated_pre_add_symbol_hook
)
932 deprecated_pre_add_symbol_hook (name
);
935 printf_unfiltered (_("Reading symbols from %s..."), name
);
937 gdb_flush (gdb_stdout
);
940 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
943 /* We now have at least a partial symbol table. Check to see if the
944 user requested that all symbols be read on initial access via either
945 the gdb startup command line or on a per symbol file basis. Expand
946 all partial symbol tables for this objfile if so. */
948 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
950 if (from_tty
|| info_verbose
)
952 printf_unfiltered (_("expanding to full symbols..."));
954 gdb_flush (gdb_stdout
);
957 for (psymtab
= objfile
->psymtabs
;
959 psymtab
= psymtab
->next
)
961 psymtab_to_symtab (psymtab
);
965 debugfile
= find_separate_debug_file (objfile
);
970 objfile
->separate_debug_objfile
971 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
975 objfile
->separate_debug_objfile
976 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
978 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
981 /* Put the separate debug object before the normal one, this is so that
982 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
983 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
988 if (!have_partial_symbols () && !have_full_symbols ())
991 printf_filtered (_("(no debugging symbols found)"));
992 if (from_tty
|| info_verbose
)
993 printf_filtered ("...");
995 printf_filtered ("\n");
999 if (from_tty
|| info_verbose
)
1001 if (deprecated_post_add_symbol_hook
)
1002 deprecated_post_add_symbol_hook ();
1005 printf_unfiltered (_("done.\n"));
1009 /* We print some messages regardless of whether 'from_tty ||
1010 info_verbose' is true, so make sure they go out at the right
1012 gdb_flush (gdb_stdout
);
1014 do_cleanups (my_cleanups
);
1016 if (objfile
->sf
== NULL
)
1017 return objfile
; /* No symbols. */
1019 new_symfile_objfile (objfile
, mainline
, from_tty
);
1021 if (deprecated_target_new_objfile_hook
)
1022 deprecated_target_new_objfile_hook (objfile
);
1024 bfd_cache_close_all ();
1029 /* Process the symbol file ABFD, as either the main file or as a
1030 dynamically loaded file.
1032 See symbol_file_add_with_addrs_or_offsets's comments for
1035 symbol_file_add_from_bfd (bfd
*abfd
, int from_tty
,
1036 struct section_addr_info
*addrs
,
1037 int mainline
, int flags
)
1039 return symbol_file_add_with_addrs_or_offsets (abfd
,
1040 from_tty
, addrs
, 0, 0,
1045 /* Process a symbol file, as either the main file or as a dynamically
1046 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1049 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
1050 int mainline
, int flags
)
1052 return symbol_file_add_from_bfd (symfile_bfd_open (name
), from_tty
,
1053 addrs
, mainline
, flags
);
1057 /* Call symbol_file_add() with default values and update whatever is
1058 affected by the loading of a new main().
1059 Used when the file is supplied in the gdb command line
1060 and by some targets with special loading requirements.
1061 The auxiliary function, symbol_file_add_main_1(), has the flags
1062 argument for the switches that can only be specified in the symbol_file
1066 symbol_file_add_main (char *args
, int from_tty
)
1068 symbol_file_add_main_1 (args
, from_tty
, 0);
1072 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1074 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1076 /* Getting new symbols may change our opinion about
1077 what is frameless. */
1078 reinit_frame_cache ();
1080 set_initial_language ();
1084 symbol_file_clear (int from_tty
)
1086 if ((have_full_symbols () || have_partial_symbols ())
1089 ? !query (_("Discard symbol table from `%s'? "),
1090 symfile_objfile
->name
)
1091 : !query (_("Discard symbol table? "))))
1092 error (_("Not confirmed."));
1093 free_all_objfiles ();
1095 /* solib descriptors may have handles to objfiles. Since their
1096 storage has just been released, we'd better wipe the solib
1097 descriptors as well.
1099 #if defined(SOLIB_RESTART)
1103 symfile_objfile
= NULL
;
1105 printf_unfiltered (_("No symbol file now.\n"));
1109 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1112 bfd_size_type debuglink_size
;
1113 unsigned long crc32
;
1118 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1123 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1125 contents
= xmalloc (debuglink_size
);
1126 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1127 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1129 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1130 crc_offset
= strlen (contents
) + 1;
1131 crc_offset
= (crc_offset
+ 3) & ~3;
1133 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1140 separate_debug_file_exists (const char *name
, unsigned long crc
)
1142 unsigned long file_crc
= 0;
1144 gdb_byte buffer
[8*1024];
1147 fd
= open (name
, O_RDONLY
| O_BINARY
);
1151 while ((count
= read (fd
, buffer
, sizeof (buffer
))) > 0)
1152 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1156 return crc
== file_crc
;
1159 char *debug_file_directory
= NULL
;
1161 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1162 struct cmd_list_element
*c
, const char *value
)
1164 fprintf_filtered (file
, _("\
1165 The directory where separate debug symbols are searched for is \"%s\".\n"),
1169 #if ! defined (DEBUG_SUBDIRECTORY)
1170 #define DEBUG_SUBDIRECTORY ".debug"
1174 find_separate_debug_file (struct objfile
*objfile
)
1182 bfd_size_type debuglink_size
;
1183 unsigned long crc32
;
1186 basename
= get_debug_link_info (objfile
, &crc32
);
1188 if (basename
== NULL
)
1191 dir
= xstrdup (objfile
->name
);
1193 /* Strip off the final filename part, leaving the directory name,
1194 followed by a slash. Objfile names should always be absolute and
1195 tilde-expanded, so there should always be a slash in there
1197 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1199 if (IS_DIR_SEPARATOR (dir
[i
]))
1202 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1205 debugfile
= alloca (strlen (debug_file_directory
) + 1
1207 + strlen (DEBUG_SUBDIRECTORY
)
1212 /* First try in the same directory as the original file. */
1213 strcpy (debugfile
, dir
);
1214 strcat (debugfile
, basename
);
1216 if (separate_debug_file_exists (debugfile
, crc32
))
1220 return xstrdup (debugfile
);
1223 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1224 strcpy (debugfile
, dir
);
1225 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1226 strcat (debugfile
, "/");
1227 strcat (debugfile
, basename
);
1229 if (separate_debug_file_exists (debugfile
, crc32
))
1233 return xstrdup (debugfile
);
1236 /* Then try in the global debugfile directory. */
1237 strcpy (debugfile
, debug_file_directory
);
1238 strcat (debugfile
, "/");
1239 strcat (debugfile
, dir
);
1240 strcat (debugfile
, basename
);
1242 if (separate_debug_file_exists (debugfile
, crc32
))
1246 return xstrdup (debugfile
);
1249 /* If the file is in the sysroot, try using its base path in the
1250 global debugfile directory. */
1251 canon_name
= lrealpath (dir
);
1253 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1254 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1256 strcpy (debugfile
, debug_file_directory
);
1257 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1258 strcat (debugfile
, "/");
1259 strcat (debugfile
, basename
);
1261 if (separate_debug_file_exists (debugfile
, crc32
))
1266 return xstrdup (debugfile
);
1279 /* This is the symbol-file command. Read the file, analyze its
1280 symbols, and add a struct symtab to a symtab list. The syntax of
1281 the command is rather bizarre:
1283 1. The function buildargv implements various quoting conventions
1284 which are undocumented and have little or nothing in common with
1285 the way things are quoted (or not quoted) elsewhere in GDB.
1287 2. Options are used, which are not generally used in GDB (perhaps
1288 "set mapped on", "set readnow on" would be better)
1290 3. The order of options matters, which is contrary to GNU
1291 conventions (because it is confusing and inconvenient). */
1294 symbol_file_command (char *args
, int from_tty
)
1300 symbol_file_clear (from_tty
);
1304 char **argv
= buildargv (args
);
1305 int flags
= OBJF_USERLOADED
;
1306 struct cleanup
*cleanups
;
1312 cleanups
= make_cleanup_freeargv (argv
);
1313 while (*argv
!= NULL
)
1315 if (strcmp (*argv
, "-readnow") == 0)
1316 flags
|= OBJF_READNOW
;
1317 else if (**argv
== '-')
1318 error (_("unknown option `%s'"), *argv
);
1321 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1329 error (_("no symbol file name was specified"));
1331 do_cleanups (cleanups
);
1335 /* Set the initial language.
1337 FIXME: A better solution would be to record the language in the
1338 psymtab when reading partial symbols, and then use it (if known) to
1339 set the language. This would be a win for formats that encode the
1340 language in an easily discoverable place, such as DWARF. For
1341 stabs, we can jump through hoops looking for specially named
1342 symbols or try to intuit the language from the specific type of
1343 stabs we find, but we can't do that until later when we read in
1347 set_initial_language (void)
1349 struct partial_symtab
*pst
;
1350 enum language lang
= language_unknown
;
1352 pst
= find_main_psymtab ();
1355 if (pst
->filename
!= NULL
)
1356 lang
= deduce_language_from_filename (pst
->filename
);
1358 if (lang
== language_unknown
)
1360 /* Make C the default language */
1364 set_language (lang
);
1365 expected_language
= current_language
; /* Don't warn the user. */
1369 /* Open the file specified by NAME and hand it off to BFD for
1370 preliminary analysis. Return a newly initialized bfd *, which
1371 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1372 absolute). In case of trouble, error() is called. */
1375 symfile_bfd_open (char *name
)
1379 char *absolute_name
;
1381 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1383 /* Look down path for it, allocate 2nd new malloc'd copy. */
1384 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1385 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1386 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1389 char *exename
= alloca (strlen (name
) + 5);
1390 strcat (strcpy (exename
, name
), ".exe");
1391 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1392 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1397 make_cleanup (xfree
, name
);
1398 perror_with_name (name
);
1401 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1402 bfd. It'll be freed in free_objfile(). */
1404 name
= absolute_name
;
1406 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1410 make_cleanup (xfree
, name
);
1411 error (_("\"%s\": can't open to read symbols: %s."), name
,
1412 bfd_errmsg (bfd_get_error ()));
1414 bfd_set_cacheable (sym_bfd
, 1);
1416 if (!bfd_check_format (sym_bfd
, bfd_object
))
1418 /* FIXME: should be checking for errors from bfd_close (for one
1419 thing, on error it does not free all the storage associated
1421 bfd_close (sym_bfd
); /* This also closes desc. */
1422 make_cleanup (xfree
, name
);
1423 error (_("\"%s\": can't read symbols: %s."), name
,
1424 bfd_errmsg (bfd_get_error ()));
1430 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1431 the section was not found. */
1434 get_section_index (struct objfile
*objfile
, char *section_name
)
1436 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1444 /* Link SF into the global symtab_fns list. Called on startup by the
1445 _initialize routine in each object file format reader, to register
1446 information about each format the the reader is prepared to
1450 add_symtab_fns (struct sym_fns
*sf
)
1452 sf
->next
= symtab_fns
;
1456 /* Initialize OBJFILE to read symbols from its associated BFD. It
1457 either returns or calls error(). The result is an initialized
1458 struct sym_fns in the objfile structure, that contains cached
1459 information about the symbol file. */
1462 find_sym_fns (struct objfile
*objfile
)
1465 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1466 char *our_target
= bfd_get_target (objfile
->obfd
);
1468 if (our_flavour
== bfd_target_srec_flavour
1469 || our_flavour
== bfd_target_ihex_flavour
1470 || our_flavour
== bfd_target_tekhex_flavour
)
1471 return; /* No symbols. */
1473 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1475 if (our_flavour
== sf
->sym_flavour
)
1482 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1483 bfd_get_target (objfile
->obfd
));
1487 /* This function runs the load command of our current target. */
1490 load_command (char *arg
, int from_tty
)
1497 parg
= arg
= get_exec_file (1);
1499 /* Count how many \ " ' tab space there are in the name. */
1500 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1508 /* We need to quote this string so buildargv can pull it apart. */
1509 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1513 make_cleanup (xfree
, temp
);
1516 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1518 strncpy (ptemp
, prev
, parg
- prev
);
1519 ptemp
+= parg
- prev
;
1523 strcpy (ptemp
, prev
);
1529 /* The user might be reloading because the binary has changed. Take
1530 this opportunity to check. */
1531 reopen_exec_file ();
1534 target_load (arg
, from_tty
);
1536 /* After re-loading the executable, we don't really know which
1537 overlays are mapped any more. */
1538 overlay_cache_invalid
= 1;
1541 /* This version of "load" should be usable for any target. Currently
1542 it is just used for remote targets, not inftarg.c or core files,
1543 on the theory that only in that case is it useful.
1545 Avoiding xmodem and the like seems like a win (a) because we don't have
1546 to worry about finding it, and (b) On VMS, fork() is very slow and so
1547 we don't want to run a subprocess. On the other hand, I'm not sure how
1548 performance compares. */
1550 static int validate_download
= 0;
1552 /* Callback service function for generic_load (bfd_map_over_sections). */
1555 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1557 bfd_size_type
*sum
= data
;
1559 *sum
+= bfd_get_section_size (asec
);
1562 /* Opaque data for load_section_callback. */
1563 struct load_section_data
{
1564 unsigned long load_offset
;
1565 struct load_progress_data
*progress_data
;
1566 VEC(memory_write_request_s
) *requests
;
1569 /* Opaque data for load_progress. */
1570 struct load_progress_data
{
1571 /* Cumulative data. */
1572 unsigned long write_count
;
1573 unsigned long data_count
;
1574 bfd_size_type total_size
;
1577 /* Opaque data for load_progress for a single section. */
1578 struct load_progress_section_data
{
1579 struct load_progress_data
*cumulative
;
1581 /* Per-section data. */
1582 const char *section_name
;
1583 ULONGEST section_sent
;
1584 ULONGEST section_size
;
1589 /* Target write callback routine for progress reporting. */
1592 load_progress (ULONGEST bytes
, void *untyped_arg
)
1594 struct load_progress_section_data
*args
= untyped_arg
;
1595 struct load_progress_data
*totals
;
1598 /* Writing padding data. No easy way to get at the cumulative
1599 stats, so just ignore this. */
1602 totals
= args
->cumulative
;
1604 if (bytes
== 0 && args
->section_sent
== 0)
1606 /* The write is just starting. Let the user know we've started
1608 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1609 args
->section_name
, paddr_nz (args
->section_size
),
1610 paddr_nz (args
->lma
));
1614 if (validate_download
)
1616 /* Broken memories and broken monitors manifest themselves here
1617 when bring new computers to life. This doubles already slow
1619 /* NOTE: cagney/1999-10-18: A more efficient implementation
1620 might add a verify_memory() method to the target vector and
1621 then use that. remote.c could implement that method using
1622 the ``qCRC'' packet. */
1623 gdb_byte
*check
= xmalloc (bytes
);
1624 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1626 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1627 error (_("Download verify read failed at 0x%s"),
1629 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1630 error (_("Download verify compare failed at 0x%s"),
1632 do_cleanups (verify_cleanups
);
1634 totals
->data_count
+= bytes
;
1636 args
->buffer
+= bytes
;
1637 totals
->write_count
+= 1;
1638 args
->section_sent
+= bytes
;
1640 || (deprecated_ui_load_progress_hook
!= NULL
1641 && deprecated_ui_load_progress_hook (args
->section_name
,
1642 args
->section_sent
)))
1643 error (_("Canceled the download"));
1645 if (deprecated_show_load_progress
!= NULL
)
1646 deprecated_show_load_progress (args
->section_name
,
1650 totals
->total_size
);
1653 /* Callback service function for generic_load (bfd_map_over_sections). */
1656 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1658 struct memory_write_request
*new_request
;
1659 struct load_section_data
*args
= data
;
1660 struct load_progress_section_data
*section_data
;
1661 bfd_size_type size
= bfd_get_section_size (asec
);
1663 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1665 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1671 new_request
= VEC_safe_push (memory_write_request_s
,
1672 args
->requests
, NULL
);
1673 memset (new_request
, 0, sizeof (struct memory_write_request
));
1674 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1675 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1676 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1677 new_request
->data
= xmalloc (size
);
1678 new_request
->baton
= section_data
;
1680 buffer
= new_request
->data
;
1682 section_data
->cumulative
= args
->progress_data
;
1683 section_data
->section_name
= sect_name
;
1684 section_data
->section_size
= size
;
1685 section_data
->lma
= new_request
->begin
;
1686 section_data
->buffer
= buffer
;
1688 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1691 /* Clean up an entire memory request vector, including load
1692 data and progress records. */
1695 clear_memory_write_data (void *arg
)
1697 VEC(memory_write_request_s
) **vec_p
= arg
;
1698 VEC(memory_write_request_s
) *vec
= *vec_p
;
1700 struct memory_write_request
*mr
;
1702 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1707 VEC_free (memory_write_request_s
, vec
);
1711 generic_load (char *args
, int from_tty
)
1714 struct timeval start_time
, end_time
;
1716 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1717 struct load_section_data cbdata
;
1718 struct load_progress_data total_progress
;
1723 memset (&cbdata
, 0, sizeof (cbdata
));
1724 memset (&total_progress
, 0, sizeof (total_progress
));
1725 cbdata
.progress_data
= &total_progress
;
1727 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1729 argv
= buildargv (args
);
1734 make_cleanup_freeargv (argv
);
1736 filename
= tilde_expand (argv
[0]);
1737 make_cleanup (xfree
, filename
);
1739 if (argv
[1] != NULL
)
1743 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1745 /* If the last word was not a valid number then
1746 treat it as a file name with spaces in. */
1747 if (argv
[1] == endptr
)
1748 error (_("Invalid download offset:%s."), argv
[1]);
1750 if (argv
[2] != NULL
)
1751 error (_("Too many parameters."));
1754 /* Open the file for loading. */
1755 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1756 if (loadfile_bfd
== NULL
)
1758 perror_with_name (filename
);
1762 /* FIXME: should be checking for errors from bfd_close (for one thing,
1763 on error it does not free all the storage associated with the
1765 make_cleanup_bfd_close (loadfile_bfd
);
1767 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1769 error (_("\"%s\" is not an object file: %s"), filename
,
1770 bfd_errmsg (bfd_get_error ()));
1773 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1774 (void *) &total_progress
.total_size
);
1776 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1778 gettimeofday (&start_time
, NULL
);
1780 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1781 load_progress
) != 0)
1782 error (_("Load failed"));
1784 gettimeofday (&end_time
, NULL
);
1786 entry
= bfd_get_start_address (loadfile_bfd
);
1787 ui_out_text (uiout
, "Start address ");
1788 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1789 ui_out_text (uiout
, ", load size ");
1790 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
1791 ui_out_text (uiout
, "\n");
1792 /* We were doing this in remote-mips.c, I suspect it is right
1793 for other targets too. */
1796 /* FIXME: are we supposed to call symbol_file_add or not? According
1797 to a comment from remote-mips.c (where a call to symbol_file_add
1798 was commented out), making the call confuses GDB if more than one
1799 file is loaded in. Some targets do (e.g., remote-vx.c) but
1800 others don't (or didn't - perhaps they have all been deleted). */
1802 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
1803 total_progress
.write_count
,
1804 &start_time
, &end_time
);
1806 do_cleanups (old_cleanups
);
1809 /* Report how fast the transfer went. */
1811 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1812 replaced by print_transfer_performance (with a very different
1813 function signature). */
1816 report_transfer_performance (unsigned long data_count
, time_t start_time
,
1819 struct timeval start
, end
;
1821 start
.tv_sec
= start_time
;
1823 end
.tv_sec
= end_time
;
1826 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
1830 print_transfer_performance (struct ui_file
*stream
,
1831 unsigned long data_count
,
1832 unsigned long write_count
,
1833 const struct timeval
*start_time
,
1834 const struct timeval
*end_time
)
1836 unsigned long time_count
;
1838 /* Compute the elapsed time in milliseconds, as a tradeoff between
1839 accuracy and overflow. */
1840 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
1841 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
1843 ui_out_text (uiout
, "Transfer rate: ");
1846 ui_out_field_fmt (uiout
, "transfer-rate", "%lu",
1847 1000 * (data_count
* 8) / time_count
);
1848 ui_out_text (uiout
, " bits/sec");
1852 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
1853 ui_out_text (uiout
, " bits in <1 sec");
1855 if (write_count
> 0)
1857 ui_out_text (uiout
, ", ");
1858 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
1859 ui_out_text (uiout
, " bytes/write");
1861 ui_out_text (uiout
, ".\n");
1864 /* This function allows the addition of incrementally linked object files.
1865 It does not modify any state in the target, only in the debugger. */
1866 /* Note: ezannoni 2000-04-13 This function/command used to have a
1867 special case syntax for the rombug target (Rombug is the boot
1868 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1869 rombug case, the user doesn't need to supply a text address,
1870 instead a call to target_link() (in target.c) would supply the
1871 value to use. We are now discontinuing this type of ad hoc syntax. */
1874 add_symbol_file_command (char *args
, int from_tty
)
1876 char *filename
= NULL
;
1877 int flags
= OBJF_USERLOADED
;
1879 int expecting_option
= 0;
1880 int section_index
= 0;
1884 int expecting_sec_name
= 0;
1885 int expecting_sec_addr
= 0;
1894 struct section_addr_info
*section_addrs
;
1895 struct sect_opt
*sect_opts
= NULL
;
1896 size_t num_sect_opts
= 0;
1897 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
1900 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
1901 * sizeof (struct sect_opt
));
1906 error (_("add-symbol-file takes a file name and an address"));
1908 argv
= buildargv (args
);
1909 make_cleanup_freeargv (argv
);
1914 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
1916 /* Process the argument. */
1919 /* The first argument is the file name. */
1920 filename
= tilde_expand (arg
);
1921 make_cleanup (xfree
, filename
);
1926 /* The second argument is always the text address at which
1927 to load the program. */
1928 sect_opts
[section_index
].name
= ".text";
1929 sect_opts
[section_index
].value
= arg
;
1930 if (++section_index
>= num_sect_opts
)
1933 sect_opts
= ((struct sect_opt
*)
1934 xrealloc (sect_opts
,
1936 * sizeof (struct sect_opt
)));
1941 /* It's an option (starting with '-') or it's an argument
1946 if (strcmp (arg
, "-readnow") == 0)
1947 flags
|= OBJF_READNOW
;
1948 else if (strcmp (arg
, "-s") == 0)
1950 expecting_sec_name
= 1;
1951 expecting_sec_addr
= 1;
1956 if (expecting_sec_name
)
1958 sect_opts
[section_index
].name
= arg
;
1959 expecting_sec_name
= 0;
1962 if (expecting_sec_addr
)
1964 sect_opts
[section_index
].value
= arg
;
1965 expecting_sec_addr
= 0;
1966 if (++section_index
>= num_sect_opts
)
1969 sect_opts
= ((struct sect_opt
*)
1970 xrealloc (sect_opts
,
1972 * sizeof (struct sect_opt
)));
1976 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
1981 /* This command takes at least two arguments. The first one is a
1982 filename, and the second is the address where this file has been
1983 loaded. Abort now if this address hasn't been provided by the
1985 if (section_index
< 1)
1986 error (_("The address where %s has been loaded is missing"), filename
);
1988 /* Print the prompt for the query below. And save the arguments into
1989 a sect_addr_info structure to be passed around to other
1990 functions. We have to split this up into separate print
1991 statements because hex_string returns a local static
1994 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
1995 section_addrs
= alloc_section_addr_info (section_index
);
1996 make_cleanup (xfree
, section_addrs
);
1997 for (i
= 0; i
< section_index
; i
++)
2000 char *val
= sect_opts
[i
].value
;
2001 char *sec
= sect_opts
[i
].name
;
2003 addr
= parse_and_eval_address (val
);
2005 /* Here we store the section offsets in the order they were
2006 entered on the command line. */
2007 section_addrs
->other
[sec_num
].name
= sec
;
2008 section_addrs
->other
[sec_num
].addr
= addr
;
2009 printf_unfiltered ("\t%s_addr = %s\n",
2010 sec
, hex_string ((unsigned long)addr
));
2013 /* The object's sections are initialized when a
2014 call is made to build_objfile_section_table (objfile).
2015 This happens in reread_symbols.
2016 At this point, we don't know what file type this is,
2017 so we can't determine what section names are valid. */
2020 if (from_tty
&& (!query ("%s", "")))
2021 error (_("Not confirmed."));
2023 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
2025 /* Getting new symbols may change our opinion about what is
2027 reinit_frame_cache ();
2028 do_cleanups (my_cleanups
);
2032 add_shared_symbol_files_command (char *args
, int from_tty
)
2034 #ifdef ADD_SHARED_SYMBOL_FILES
2035 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
2037 error (_("This command is not available in this configuration of GDB."));
2041 /* Re-read symbols if a symbol-file has changed. */
2043 reread_symbols (void)
2045 struct objfile
*objfile
;
2048 struct stat new_statbuf
;
2051 /* With the addition of shared libraries, this should be modified,
2052 the load time should be saved in the partial symbol tables, since
2053 different tables may come from different source files. FIXME.
2054 This routine should then walk down each partial symbol table
2055 and see if the symbol table that it originates from has been changed */
2057 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2061 #ifdef DEPRECATED_IBM6000_TARGET
2062 /* If this object is from a shared library, then you should
2063 stat on the library name, not member name. */
2065 if (objfile
->obfd
->my_archive
)
2066 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2069 res
= stat (objfile
->name
, &new_statbuf
);
2072 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2073 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2077 new_modtime
= new_statbuf
.st_mtime
;
2078 if (new_modtime
!= objfile
->mtime
)
2080 struct cleanup
*old_cleanups
;
2081 struct section_offsets
*offsets
;
2083 char *obfd_filename
;
2085 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2088 /* There are various functions like symbol_file_add,
2089 symfile_bfd_open, syms_from_objfile, etc., which might
2090 appear to do what we want. But they have various other
2091 effects which we *don't* want. So we just do stuff
2092 ourselves. We don't worry about mapped files (for one thing,
2093 any mapped file will be out of date). */
2095 /* If we get an error, blow away this objfile (not sure if
2096 that is the correct response for things like shared
2098 old_cleanups
= make_cleanup_free_objfile (objfile
);
2099 /* We need to do this whenever any symbols go away. */
2100 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2102 /* Clean up any state BFD has sitting around. We don't need
2103 to close the descriptor but BFD lacks a way of closing the
2104 BFD without closing the descriptor. */
2105 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2106 if (!bfd_close (objfile
->obfd
))
2107 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2108 bfd_errmsg (bfd_get_error ()));
2109 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2110 if (objfile
->obfd
== NULL
)
2111 error (_("Can't open %s to read symbols."), objfile
->name
);
2112 /* bfd_openr sets cacheable to true, which is what we want. */
2113 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2114 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2115 bfd_errmsg (bfd_get_error ()));
2117 /* Save the offsets, we will nuke them with the rest of the
2119 num_offsets
= objfile
->num_sections
;
2120 offsets
= ((struct section_offsets
*)
2121 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2122 memcpy (offsets
, objfile
->section_offsets
,
2123 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2125 /* Remove any references to this objfile in the global
2127 preserve_values (objfile
);
2129 /* Nuke all the state that we will re-read. Much of the following
2130 code which sets things to NULL really is necessary to tell
2131 other parts of GDB that there is nothing currently there. */
2133 /* FIXME: Do we have to free a whole linked list, or is this
2135 if (objfile
->global_psymbols
.list
)
2136 xfree (objfile
->global_psymbols
.list
);
2137 memset (&objfile
->global_psymbols
, 0,
2138 sizeof (objfile
->global_psymbols
));
2139 if (objfile
->static_psymbols
.list
)
2140 xfree (objfile
->static_psymbols
.list
);
2141 memset (&objfile
->static_psymbols
, 0,
2142 sizeof (objfile
->static_psymbols
));
2144 /* Free the obstacks for non-reusable objfiles */
2145 bcache_xfree (objfile
->psymbol_cache
);
2146 objfile
->psymbol_cache
= bcache_xmalloc ();
2147 bcache_xfree (objfile
->macro_cache
);
2148 objfile
->macro_cache
= bcache_xmalloc ();
2149 if (objfile
->demangled_names_hash
!= NULL
)
2151 htab_delete (objfile
->demangled_names_hash
);
2152 objfile
->demangled_names_hash
= NULL
;
2154 obstack_free (&objfile
->objfile_obstack
, 0);
2155 objfile
->sections
= NULL
;
2156 objfile
->symtabs
= NULL
;
2157 objfile
->psymtabs
= NULL
;
2158 objfile
->free_psymtabs
= NULL
;
2159 objfile
->cp_namespace_symtab
= NULL
;
2160 objfile
->msymbols
= NULL
;
2161 objfile
->deprecated_sym_private
= NULL
;
2162 objfile
->minimal_symbol_count
= 0;
2163 memset (&objfile
->msymbol_hash
, 0,
2164 sizeof (objfile
->msymbol_hash
));
2165 memset (&objfile
->msymbol_demangled_hash
, 0,
2166 sizeof (objfile
->msymbol_demangled_hash
));
2167 objfile
->fundamental_types
= NULL
;
2168 clear_objfile_data (objfile
);
2169 if (objfile
->sf
!= NULL
)
2171 (*objfile
->sf
->sym_finish
) (objfile
);
2174 /* We never make this a mapped file. */
2176 objfile
->psymbol_cache
= bcache_xmalloc ();
2177 objfile
->macro_cache
= bcache_xmalloc ();
2178 /* obstack_init also initializes the obstack so it is
2179 empty. We could use obstack_specify_allocation but
2180 gdb_obstack.h specifies the alloc/dealloc
2182 obstack_init (&objfile
->objfile_obstack
);
2183 if (build_objfile_section_table (objfile
))
2185 error (_("Can't find the file sections in `%s': %s"),
2186 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2188 terminate_minimal_symbol_table (objfile
);
2190 /* We use the same section offsets as from last time. I'm not
2191 sure whether that is always correct for shared libraries. */
2192 objfile
->section_offsets
= (struct section_offsets
*)
2193 obstack_alloc (&objfile
->objfile_obstack
,
2194 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2195 memcpy (objfile
->section_offsets
, offsets
,
2196 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2197 objfile
->num_sections
= num_offsets
;
2199 /* What the hell is sym_new_init for, anyway? The concept of
2200 distinguishing between the main file and additional files
2201 in this way seems rather dubious. */
2202 if (objfile
== symfile_objfile
)
2204 (*objfile
->sf
->sym_new_init
) (objfile
);
2207 (*objfile
->sf
->sym_init
) (objfile
);
2208 clear_complaints (&symfile_complaints
, 1, 1);
2209 /* The "mainline" parameter is a hideous hack; I think leaving it
2210 zero is OK since dbxread.c also does what it needs to do if
2211 objfile->global_psymbols.size is 0. */
2212 (*objfile
->sf
->sym_read
) (objfile
, 0);
2213 if (!have_partial_symbols () && !have_full_symbols ())
2216 printf_unfiltered (_("(no debugging symbols found)\n"));
2219 objfile
->flags
|= OBJF_SYMS
;
2221 /* We're done reading the symbol file; finish off complaints. */
2222 clear_complaints (&symfile_complaints
, 0, 1);
2224 /* Getting new symbols may change our opinion about what is
2227 reinit_frame_cache ();
2229 /* Discard cleanups as symbol reading was successful. */
2230 discard_cleanups (old_cleanups
);
2232 /* If the mtime has changed between the time we set new_modtime
2233 and now, we *want* this to be out of date, so don't call stat
2235 objfile
->mtime
= new_modtime
;
2237 reread_separate_symbols (objfile
);
2244 clear_symtab_users ();
2245 /* At least one objfile has changed, so we can consider that
2246 the executable we're debugging has changed too. */
2247 observer_notify_executable_changed (NULL
);
2253 /* Handle separate debug info for OBJFILE, which has just been
2255 - If we had separate debug info before, but now we don't, get rid
2256 of the separated objfile.
2257 - If we didn't have separated debug info before, but now we do,
2258 read in the new separated debug info file.
2259 - If the debug link points to a different file, toss the old one
2260 and read the new one.
2261 This function does *not* handle the case where objfile is still
2262 using the same separate debug info file, but that file's timestamp
2263 has changed. That case should be handled by the loop in
2264 reread_symbols already. */
2266 reread_separate_symbols (struct objfile
*objfile
)
2269 unsigned long crc32
;
2271 /* Does the updated objfile's debug info live in a
2273 debug_file
= find_separate_debug_file (objfile
);
2275 if (objfile
->separate_debug_objfile
)
2277 /* There are two cases where we need to get rid of
2278 the old separated debug info objfile:
2279 - if the new primary objfile doesn't have
2280 separated debug info, or
2281 - if the new primary objfile has separate debug
2282 info, but it's under a different filename.
2284 If the old and new objfiles both have separate
2285 debug info, under the same filename, then we're
2286 okay --- if the separated file's contents have
2287 changed, we will have caught that when we
2288 visited it in this function's outermost
2291 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2292 free_objfile (objfile
->separate_debug_objfile
);
2295 /* If the new objfile has separate debug info, and we
2296 haven't loaded it already, do so now. */
2298 && ! objfile
->separate_debug_objfile
)
2300 /* Use the same section offset table as objfile itself.
2301 Preserve the flags from objfile that make sense. */
2302 objfile
->separate_debug_objfile
2303 = (symbol_file_add_with_addrs_or_offsets
2304 (symfile_bfd_open (debug_file
),
2305 info_verbose
, /* from_tty: Don't override the default. */
2306 0, /* No addr table. */
2307 objfile
->section_offsets
, objfile
->num_sections
,
2308 0, /* Not mainline. See comments about this above. */
2309 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2310 | OBJF_USERLOADED
)));
2311 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2327 static filename_language
*filename_language_table
;
2328 static int fl_table_size
, fl_table_next
;
2331 add_filename_language (char *ext
, enum language lang
)
2333 if (fl_table_next
>= fl_table_size
)
2335 fl_table_size
+= 10;
2336 filename_language_table
=
2337 xrealloc (filename_language_table
,
2338 fl_table_size
* sizeof (*filename_language_table
));
2341 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2342 filename_language_table
[fl_table_next
].lang
= lang
;
2346 static char *ext_args
;
2348 show_ext_args (struct ui_file
*file
, int from_tty
,
2349 struct cmd_list_element
*c
, const char *value
)
2351 fprintf_filtered (file
, _("\
2352 Mapping between filename extension and source language is \"%s\".\n"),
2357 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2360 char *cp
= ext_args
;
2363 /* First arg is filename extension, starting with '.' */
2365 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2367 /* Find end of first arg. */
2368 while (*cp
&& !isspace (*cp
))
2372 error (_("'%s': two arguments required -- filename extension and language"),
2375 /* Null-terminate first arg */
2378 /* Find beginning of second arg, which should be a source language. */
2379 while (*cp
&& isspace (*cp
))
2383 error (_("'%s': two arguments required -- filename extension and language"),
2386 /* Lookup the language from among those we know. */
2387 lang
= language_enum (cp
);
2389 /* Now lookup the filename extension: do we already know it? */
2390 for (i
= 0; i
< fl_table_next
; i
++)
2391 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2394 if (i
>= fl_table_next
)
2396 /* new file extension */
2397 add_filename_language (ext_args
, lang
);
2401 /* redefining a previously known filename extension */
2404 /* query ("Really make files of type %s '%s'?", */
2405 /* ext_args, language_str (lang)); */
2407 xfree (filename_language_table
[i
].ext
);
2408 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2409 filename_language_table
[i
].lang
= lang
;
2414 info_ext_lang_command (char *args
, int from_tty
)
2418 printf_filtered (_("Filename extensions and the languages they represent:"));
2419 printf_filtered ("\n\n");
2420 for (i
= 0; i
< fl_table_next
; i
++)
2421 printf_filtered ("\t%s\t- %s\n",
2422 filename_language_table
[i
].ext
,
2423 language_str (filename_language_table
[i
].lang
));
2427 init_filename_language_table (void)
2429 if (fl_table_size
== 0) /* protect against repetition */
2433 filename_language_table
=
2434 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2435 add_filename_language (".c", language_c
);
2436 add_filename_language (".C", language_cplus
);
2437 add_filename_language (".cc", language_cplus
);
2438 add_filename_language (".cp", language_cplus
);
2439 add_filename_language (".cpp", language_cplus
);
2440 add_filename_language (".cxx", language_cplus
);
2441 add_filename_language (".c++", language_cplus
);
2442 add_filename_language (".java", language_java
);
2443 add_filename_language (".class", language_java
);
2444 add_filename_language (".m", language_objc
);
2445 add_filename_language (".f", language_fortran
);
2446 add_filename_language (".F", language_fortran
);
2447 add_filename_language (".s", language_asm
);
2448 add_filename_language (".S", language_asm
);
2449 add_filename_language (".pas", language_pascal
);
2450 add_filename_language (".p", language_pascal
);
2451 add_filename_language (".pp", language_pascal
);
2452 add_filename_language (".adb", language_ada
);
2453 add_filename_language (".ads", language_ada
);
2454 add_filename_language (".a", language_ada
);
2455 add_filename_language (".ada", language_ada
);
2460 deduce_language_from_filename (char *filename
)
2465 if (filename
!= NULL
)
2466 if ((cp
= strrchr (filename
, '.')) != NULL
)
2467 for (i
= 0; i
< fl_table_next
; i
++)
2468 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2469 return filename_language_table
[i
].lang
;
2471 return language_unknown
;
2476 Allocate and partly initialize a new symbol table. Return a pointer
2477 to it. error() if no space.
2479 Caller must set these fields:
2485 possibly free_named_symtabs (symtab->filename);
2489 allocate_symtab (char *filename
, struct objfile
*objfile
)
2491 struct symtab
*symtab
;
2493 symtab
= (struct symtab
*)
2494 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2495 memset (symtab
, 0, sizeof (*symtab
));
2496 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2497 &objfile
->objfile_obstack
);
2498 symtab
->fullname
= NULL
;
2499 symtab
->language
= deduce_language_from_filename (filename
);
2500 symtab
->debugformat
= obsavestring ("unknown", 7,
2501 &objfile
->objfile_obstack
);
2503 /* Hook it to the objfile it comes from */
2505 symtab
->objfile
= objfile
;
2506 symtab
->next
= objfile
->symtabs
;
2507 objfile
->symtabs
= symtab
;
2512 struct partial_symtab
*
2513 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2515 struct partial_symtab
*psymtab
;
2517 if (objfile
->free_psymtabs
)
2519 psymtab
= objfile
->free_psymtabs
;
2520 objfile
->free_psymtabs
= psymtab
->next
;
2523 psymtab
= (struct partial_symtab
*)
2524 obstack_alloc (&objfile
->objfile_obstack
,
2525 sizeof (struct partial_symtab
));
2527 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2528 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2529 &objfile
->objfile_obstack
);
2530 psymtab
->symtab
= NULL
;
2532 /* Prepend it to the psymtab list for the objfile it belongs to.
2533 Psymtabs are searched in most recent inserted -> least recent
2536 psymtab
->objfile
= objfile
;
2537 psymtab
->next
= objfile
->psymtabs
;
2538 objfile
->psymtabs
= psymtab
;
2541 struct partial_symtab
**prev_pst
;
2542 psymtab
->objfile
= objfile
;
2543 psymtab
->next
= NULL
;
2544 prev_pst
= &(objfile
->psymtabs
);
2545 while ((*prev_pst
) != NULL
)
2546 prev_pst
= &((*prev_pst
)->next
);
2547 (*prev_pst
) = psymtab
;
2555 discard_psymtab (struct partial_symtab
*pst
)
2557 struct partial_symtab
**prev_pst
;
2560 Empty psymtabs happen as a result of header files which don't
2561 have any symbols in them. There can be a lot of them. But this
2562 check is wrong, in that a psymtab with N_SLINE entries but
2563 nothing else is not empty, but we don't realize that. Fixing
2564 that without slowing things down might be tricky. */
2566 /* First, snip it out of the psymtab chain */
2568 prev_pst
= &(pst
->objfile
->psymtabs
);
2569 while ((*prev_pst
) != pst
)
2570 prev_pst
= &((*prev_pst
)->next
);
2571 (*prev_pst
) = pst
->next
;
2573 /* Next, put it on a free list for recycling */
2575 pst
->next
= pst
->objfile
->free_psymtabs
;
2576 pst
->objfile
->free_psymtabs
= pst
;
2580 /* Reset all data structures in gdb which may contain references to symbol
2584 clear_symtab_users (void)
2586 /* Someday, we should do better than this, by only blowing away
2587 the things that really need to be blown. */
2589 /* Clear the "current" symtab first, because it is no longer valid.
2590 breakpoint_re_set may try to access the current symtab. */
2591 clear_current_source_symtab_and_line ();
2594 breakpoint_re_set ();
2595 set_default_breakpoint (0, 0, 0, 0);
2596 clear_pc_function_cache ();
2597 if (deprecated_target_new_objfile_hook
)
2598 deprecated_target_new_objfile_hook (NULL
);
2600 /* Clear globals which might have pointed into a removed objfile.
2601 FIXME: It's not clear which of these are supposed to persist
2602 between expressions and which ought to be reset each time. */
2603 expression_context_block
= NULL
;
2604 innermost_block
= NULL
;
2608 clear_symtab_users_cleanup (void *ignore
)
2610 clear_symtab_users ();
2613 /* clear_symtab_users_once:
2615 This function is run after symbol reading, or from a cleanup.
2616 If an old symbol table was obsoleted, the old symbol table
2617 has been blown away, but the other GDB data structures that may
2618 reference it have not yet been cleared or re-directed. (The old
2619 symtab was zapped, and the cleanup queued, in free_named_symtab()
2622 This function can be queued N times as a cleanup, or called
2623 directly; it will do all the work the first time, and then will be a
2624 no-op until the next time it is queued. This works by bumping a
2625 counter at queueing time. Much later when the cleanup is run, or at
2626 the end of symbol processing (in case the cleanup is discarded), if
2627 the queued count is greater than the "done-count", we do the work
2628 and set the done-count to the queued count. If the queued count is
2629 less than or equal to the done-count, we just ignore the call. This
2630 is needed because reading a single .o file will often replace many
2631 symtabs (one per .h file, for example), and we don't want to reset
2632 the breakpoints N times in the user's face.
2634 The reason we both queue a cleanup, and call it directly after symbol
2635 reading, is because the cleanup protects us in case of errors, but is
2636 discarded if symbol reading is successful. */
2639 /* FIXME: As free_named_symtabs is currently a big noop this function
2640 is no longer needed. */
2641 static void clear_symtab_users_once (void);
2643 static int clear_symtab_users_queued
;
2644 static int clear_symtab_users_done
;
2647 clear_symtab_users_once (void)
2649 /* Enforce once-per-`do_cleanups'-semantics */
2650 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2652 clear_symtab_users_done
= clear_symtab_users_queued
;
2654 clear_symtab_users ();
2658 /* Delete the specified psymtab, and any others that reference it. */
2661 cashier_psymtab (struct partial_symtab
*pst
)
2663 struct partial_symtab
*ps
, *pprev
= NULL
;
2666 /* Find its previous psymtab in the chain */
2667 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2676 /* Unhook it from the chain. */
2677 if (ps
== pst
->objfile
->psymtabs
)
2678 pst
->objfile
->psymtabs
= ps
->next
;
2680 pprev
->next
= ps
->next
;
2682 /* FIXME, we can't conveniently deallocate the entries in the
2683 partial_symbol lists (global_psymbols/static_psymbols) that
2684 this psymtab points to. These just take up space until all
2685 the psymtabs are reclaimed. Ditto the dependencies list and
2686 filename, which are all in the objfile_obstack. */
2688 /* We need to cashier any psymtab that has this one as a dependency... */
2690 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2692 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2694 if (ps
->dependencies
[i
] == pst
)
2696 cashier_psymtab (ps
);
2697 goto again
; /* Must restart, chain has been munged. */
2704 /* If a symtab or psymtab for filename NAME is found, free it along
2705 with any dependent breakpoints, displays, etc.
2706 Used when loading new versions of object modules with the "add-file"
2707 command. This is only called on the top-level symtab or psymtab's name;
2708 it is not called for subsidiary files such as .h files.
2710 Return value is 1 if we blew away the environment, 0 if not.
2711 FIXME. The return value appears to never be used.
2713 FIXME. I think this is not the best way to do this. We should
2714 work on being gentler to the environment while still cleaning up
2715 all stray pointers into the freed symtab. */
2718 free_named_symtabs (char *name
)
2721 /* FIXME: With the new method of each objfile having it's own
2722 psymtab list, this function needs serious rethinking. In particular,
2723 why was it ever necessary to toss psymtabs with specific compilation
2724 unit filenames, as opposed to all psymtabs from a particular symbol
2726 Well, the answer is that some systems permit reloading of particular
2727 compilation units. We want to blow away any old info about these
2728 compilation units, regardless of which objfiles they arrived in. --gnu. */
2731 struct symtab
*prev
;
2732 struct partial_symtab
*ps
;
2733 struct blockvector
*bv
;
2736 /* We only wack things if the symbol-reload switch is set. */
2737 if (!symbol_reloading
)
2740 /* Some symbol formats have trouble providing file names... */
2741 if (name
== 0 || *name
== '\0')
2744 /* Look for a psymtab with the specified name. */
2747 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2749 if (strcmp (name
, ps
->filename
) == 0)
2751 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2752 goto again2
; /* Must restart, chain has been munged */
2756 /* Look for a symtab with the specified name. */
2758 for (s
= symtab_list
; s
; s
= s
->next
)
2760 if (strcmp (name
, s
->filename
) == 0)
2767 if (s
== symtab_list
)
2768 symtab_list
= s
->next
;
2770 prev
->next
= s
->next
;
2772 /* For now, queue a delete for all breakpoints, displays, etc., whether
2773 or not they depend on the symtab being freed. This should be
2774 changed so that only those data structures affected are deleted. */
2776 /* But don't delete anything if the symtab is empty.
2777 This test is necessary due to a bug in "dbxread.c" that
2778 causes empty symtabs to be created for N_SO symbols that
2779 contain the pathname of the object file. (This problem
2780 has been fixed in GDB 3.9x). */
2782 bv
= BLOCKVECTOR (s
);
2783 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2784 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2785 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2787 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
2789 clear_symtab_users_queued
++;
2790 make_cleanup (clear_symtab_users_once
, 0);
2794 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
2801 /* It is still possible that some breakpoints will be affected
2802 even though no symtab was found, since the file might have
2803 been compiled without debugging, and hence not be associated
2804 with a symtab. In order to handle this correctly, we would need
2805 to keep a list of text address ranges for undebuggable files.
2806 For now, we do nothing, since this is a fairly obscure case. */
2810 /* FIXME, what about the minimal symbol table? */
2817 /* Allocate and partially fill a partial symtab. It will be
2818 completely filled at the end of the symbol list.
2820 FILENAME is the name of the symbol-file we are reading from. */
2822 struct partial_symtab
*
2823 start_psymtab_common (struct objfile
*objfile
,
2824 struct section_offsets
*section_offsets
, char *filename
,
2825 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
2826 struct partial_symbol
**static_syms
)
2828 struct partial_symtab
*psymtab
;
2830 psymtab
= allocate_psymtab (filename
, objfile
);
2831 psymtab
->section_offsets
= section_offsets
;
2832 psymtab
->textlow
= textlow
;
2833 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2834 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2835 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2839 /* Add a symbol with a long value to a psymtab.
2840 Since one arg is a struct, we pass in a ptr and deref it (sigh).
2841 Return the partial symbol that has been added. */
2843 /* NOTE: carlton/2003-09-11: The reason why we return the partial
2844 symbol is so that callers can get access to the symbol's demangled
2845 name, which they don't have any cheap way to determine otherwise.
2846 (Currenly, dwarf2read.c is the only file who uses that information,
2847 though it's possible that other readers might in the future.)
2848 Elena wasn't thrilled about that, and I don't blame her, but we
2849 couldn't come up with a better way to get that information. If
2850 it's needed in other situations, we could consider breaking up
2851 SYMBOL_SET_NAMES to provide access to the demangled name lookup
2854 const struct partial_symbol
*
2855 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
2856 enum address_class
class,
2857 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2858 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2859 enum language language
, struct objfile
*objfile
)
2861 struct partial_symbol
*psym
;
2862 char *buf
= alloca (namelength
+ 1);
2863 /* psymbol is static so that there will be no uninitialized gaps in the
2864 structure which might contain random data, causing cache misses in
2866 static struct partial_symbol psymbol
;
2868 /* Create local copy of the partial symbol */
2869 memcpy (buf
, name
, namelength
);
2870 buf
[namelength
] = '\0';
2871 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2874 SYMBOL_VALUE (&psymbol
) = val
;
2878 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2880 SYMBOL_SECTION (&psymbol
) = 0;
2881 SYMBOL_LANGUAGE (&psymbol
) = language
;
2882 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2883 PSYMBOL_CLASS (&psymbol
) = class;
2885 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
2887 /* Stash the partial symbol away in the cache */
2888 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2889 objfile
->psymbol_cache
);
2891 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2892 if (list
->next
>= list
->list
+ list
->size
)
2894 extend_psymbol_list (list
, objfile
);
2896 *list
->next
++ = psym
;
2897 OBJSTAT (objfile
, n_psyms
++);
2902 /* Add a symbol with a long value to a psymtab. This differs from
2903 * add_psymbol_to_list above in taking both a mangled and a demangled
2907 add_psymbol_with_dem_name_to_list (char *name
, int namelength
, char *dem_name
,
2908 int dem_namelength
, domain_enum domain
,
2909 enum address_class
class,
2910 struct psymbol_allocation_list
*list
, long val
, /* Value as a long */
2911 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
2912 enum language language
,
2913 struct objfile
*objfile
)
2915 struct partial_symbol
*psym
;
2916 char *buf
= alloca (namelength
+ 1);
2917 /* psymbol is static so that there will be no uninitialized gaps in the
2918 structure which might contain random data, causing cache misses in
2920 static struct partial_symbol psymbol
;
2922 /* Create local copy of the partial symbol */
2924 memcpy (buf
, name
, namelength
);
2925 buf
[namelength
] = '\0';
2926 DEPRECATED_SYMBOL_NAME (&psymbol
) = deprecated_bcache (buf
, namelength
+ 1,
2927 objfile
->psymbol_cache
);
2929 buf
= alloca (dem_namelength
+ 1);
2930 memcpy (buf
, dem_name
, dem_namelength
);
2931 buf
[dem_namelength
] = '\0';
2936 case language_cplus
:
2937 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2938 deprecated_bcache (buf
, dem_namelength
+ 1, objfile
->psymbol_cache
);
2940 /* FIXME What should be done for the default case? Ignoring for now. */
2943 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2946 SYMBOL_VALUE (&psymbol
) = val
;
2950 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2952 SYMBOL_SECTION (&psymbol
) = 0;
2953 SYMBOL_LANGUAGE (&psymbol
) = language
;
2954 PSYMBOL_DOMAIN (&psymbol
) = domain
;
2955 PSYMBOL_CLASS (&psymbol
) = class;
2956 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2958 /* Stash the partial symbol away in the cache */
2959 psym
= deprecated_bcache (&psymbol
, sizeof (struct partial_symbol
),
2960 objfile
->psymbol_cache
);
2962 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2963 if (list
->next
>= list
->list
+ list
->size
)
2965 extend_psymbol_list (list
, objfile
);
2967 *list
->next
++ = psym
;
2968 OBJSTAT (objfile
, n_psyms
++);
2971 /* Initialize storage for partial symbols. */
2974 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
2976 /* Free any previously allocated psymbol lists. */
2978 if (objfile
->global_psymbols
.list
)
2980 xfree (objfile
->global_psymbols
.list
);
2982 if (objfile
->static_psymbols
.list
)
2984 xfree (objfile
->static_psymbols
.list
);
2987 /* Current best guess is that approximately a twentieth
2988 of the total symbols (in a debugging file) are global or static
2991 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2992 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2994 if (objfile
->global_psymbols
.size
> 0)
2996 objfile
->global_psymbols
.next
=
2997 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2998 xmalloc ((objfile
->global_psymbols
.size
2999 * sizeof (struct partial_symbol
*)));
3001 if (objfile
->static_psymbols
.size
> 0)
3003 objfile
->static_psymbols
.next
=
3004 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
3005 xmalloc ((objfile
->static_psymbols
.size
3006 * sizeof (struct partial_symbol
*)));
3011 The following code implements an abstraction for debugging overlay sections.
3013 The target model is as follows:
3014 1) The gnu linker will permit multiple sections to be mapped into the
3015 same VMA, each with its own unique LMA (or load address).
3016 2) It is assumed that some runtime mechanism exists for mapping the
3017 sections, one by one, from the load address into the VMA address.
3018 3) This code provides a mechanism for gdb to keep track of which
3019 sections should be considered to be mapped from the VMA to the LMA.
3020 This information is used for symbol lookup, and memory read/write.
3021 For instance, if a section has been mapped then its contents
3022 should be read from the VMA, otherwise from the LMA.
3024 Two levels of debugger support for overlays are available. One is
3025 "manual", in which the debugger relies on the user to tell it which
3026 overlays are currently mapped. This level of support is
3027 implemented entirely in the core debugger, and the information about
3028 whether a section is mapped is kept in the objfile->obj_section table.
3030 The second level of support is "automatic", and is only available if
3031 the target-specific code provides functionality to read the target's
3032 overlay mapping table, and translate its contents for the debugger
3033 (by updating the mapped state information in the obj_section tables).
3035 The interface is as follows:
3037 overlay map <name> -- tell gdb to consider this section mapped
3038 overlay unmap <name> -- tell gdb to consider this section unmapped
3039 overlay list -- list the sections that GDB thinks are mapped
3040 overlay read-target -- get the target's state of what's mapped
3041 overlay off/manual/auto -- set overlay debugging state
3042 Functional interface:
3043 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3044 section, return that section.
3045 find_pc_overlay(pc): find any overlay section that contains
3046 the pc, either in its VMA or its LMA
3047 overlay_is_mapped(sect): true if overlay is marked as mapped
3048 section_is_overlay(sect): true if section's VMA != LMA
3049 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3050 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3051 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3052 overlay_mapped_address(...): map an address from section's LMA to VMA
3053 overlay_unmapped_address(...): map an address from section's VMA to LMA
3054 symbol_overlayed_address(...): Return a "current" address for symbol:
3055 either in VMA or LMA depending on whether
3056 the symbol's section is currently mapped
3059 /* Overlay debugging state: */
3061 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3062 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
3064 /* Target vector for refreshing overlay mapped state */
3065 static void simple_overlay_update (struct obj_section
*);
3066 void (*target_overlay_update
) (struct obj_section
*) = simple_overlay_update
;
3068 /* Function: section_is_overlay (SECTION)
3069 Returns true if SECTION has VMA not equal to LMA, ie.
3070 SECTION is loaded at an address different from where it will "run". */
3073 section_is_overlay (asection
*section
)
3075 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3077 if (overlay_debugging
)
3078 if (section
&& section
->lma
!= 0 &&
3079 section
->vma
!= section
->lma
)
3085 /* Function: overlay_invalidate_all (void)
3086 Invalidate the mapped state of all overlay sections (mark it as stale). */
3089 overlay_invalidate_all (void)
3091 struct objfile
*objfile
;
3092 struct obj_section
*sect
;
3094 ALL_OBJSECTIONS (objfile
, sect
)
3095 if (section_is_overlay (sect
->the_bfd_section
))
3096 sect
->ovly_mapped
= -1;
3099 /* Function: overlay_is_mapped (SECTION)
3100 Returns true if section is an overlay, and is currently mapped.
3101 Private: public access is thru function section_is_mapped.
3103 Access to the ovly_mapped flag is restricted to this function, so
3104 that we can do automatic update. If the global flag
3105 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3106 overlay_invalidate_all. If the mapped state of the particular
3107 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3110 overlay_is_mapped (struct obj_section
*osect
)
3112 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
3115 switch (overlay_debugging
)
3119 return 0; /* overlay debugging off */
3120 case ovly_auto
: /* overlay debugging automatic */
3121 /* Unles there is a target_overlay_update function,
3122 there's really nothing useful to do here (can't really go auto) */
3123 if (target_overlay_update
)
3125 if (overlay_cache_invalid
)
3127 overlay_invalidate_all ();
3128 overlay_cache_invalid
= 0;
3130 if (osect
->ovly_mapped
== -1)
3131 (*target_overlay_update
) (osect
);
3133 /* fall thru to manual case */
3134 case ovly_on
: /* overlay debugging manual */
3135 return osect
->ovly_mapped
== 1;
3139 /* Function: section_is_mapped
3140 Returns true if section is an overlay, and is currently mapped. */
3143 section_is_mapped (asection
*section
)
3145 struct objfile
*objfile
;
3146 struct obj_section
*osect
;
3148 if (overlay_debugging
)
3149 if (section
&& section_is_overlay (section
))
3150 ALL_OBJSECTIONS (objfile
, osect
)
3151 if (osect
->the_bfd_section
== section
)
3152 return overlay_is_mapped (osect
);
3157 /* Function: pc_in_unmapped_range
3158 If PC falls into the lma range of SECTION, return true, else false. */
3161 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
3163 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3167 if (overlay_debugging
)
3168 if (section
&& section_is_overlay (section
))
3170 size
= bfd_get_section_size (section
);
3171 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
3177 /* Function: pc_in_mapped_range
3178 If PC falls into the vma range of SECTION, return true, else false. */
3181 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
3183 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3187 if (overlay_debugging
)
3188 if (section
&& section_is_overlay (section
))
3190 size
= bfd_get_section_size (section
);
3191 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
3198 /* Return true if the mapped ranges of sections A and B overlap, false
3201 sections_overlap (asection
*a
, asection
*b
)
3203 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3205 CORE_ADDR a_start
= a
->vma
;
3206 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size (a
);
3207 CORE_ADDR b_start
= b
->vma
;
3208 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size (b
);
3210 return (a_start
< b_end
&& b_start
< a_end
);
3213 /* Function: overlay_unmapped_address (PC, SECTION)
3214 Returns the address corresponding to PC in the unmapped (load) range.
3215 May be the same as PC. */
3218 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3220 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3222 if (overlay_debugging
)
3223 if (section
&& section_is_overlay (section
) &&
3224 pc_in_mapped_range (pc
, section
))
3225 return pc
+ section
->lma
- section
->vma
;
3230 /* Function: overlay_mapped_address (PC, SECTION)
3231 Returns the address corresponding to PC in the mapped (runtime) range.
3232 May be the same as PC. */
3235 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3237 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3239 if (overlay_debugging
)
3240 if (section
&& section_is_overlay (section
) &&
3241 pc_in_unmapped_range (pc
, section
))
3242 return pc
+ section
->vma
- section
->lma
;
3248 /* Function: symbol_overlayed_address
3249 Return one of two addresses (relative to the VMA or to the LMA),
3250 depending on whether the section is mapped or not. */
3253 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3255 if (overlay_debugging
)
3257 /* If the symbol has no section, just return its regular address. */
3260 /* If the symbol's section is not an overlay, just return its address */
3261 if (!section_is_overlay (section
))
3263 /* If the symbol's section is mapped, just return its address */
3264 if (section_is_mapped (section
))
3267 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3268 * then return its LOADED address rather than its vma address!!
3270 return overlay_unmapped_address (address
, section
);
3275 /* Function: find_pc_overlay (PC)
3276 Return the best-match overlay section for PC:
3277 If PC matches a mapped overlay section's VMA, return that section.
3278 Else if PC matches an unmapped section's VMA, return that section.
3279 Else if PC matches an unmapped section's LMA, return that section. */
3282 find_pc_overlay (CORE_ADDR pc
)
3284 struct objfile
*objfile
;
3285 struct obj_section
*osect
, *best_match
= NULL
;
3287 if (overlay_debugging
)
3288 ALL_OBJSECTIONS (objfile
, osect
)
3289 if (section_is_overlay (osect
->the_bfd_section
))
3291 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3293 if (overlay_is_mapped (osect
))
3294 return osect
->the_bfd_section
;
3298 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3301 return best_match
? best_match
->the_bfd_section
: NULL
;
3304 /* Function: find_pc_mapped_section (PC)
3305 If PC falls into the VMA address range of an overlay section that is
3306 currently marked as MAPPED, return that section. Else return NULL. */
3309 find_pc_mapped_section (CORE_ADDR pc
)
3311 struct objfile
*objfile
;
3312 struct obj_section
*osect
;
3314 if (overlay_debugging
)
3315 ALL_OBJSECTIONS (objfile
, osect
)
3316 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3317 overlay_is_mapped (osect
))
3318 return osect
->the_bfd_section
;
3323 /* Function: list_overlays_command
3324 Print a list of mapped sections and their PC ranges */
3327 list_overlays_command (char *args
, int from_tty
)
3330 struct objfile
*objfile
;
3331 struct obj_section
*osect
;
3333 if (overlay_debugging
)
3334 ALL_OBJSECTIONS (objfile
, osect
)
3335 if (overlay_is_mapped (osect
))
3341 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3342 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3343 size
= bfd_get_section_size (osect
->the_bfd_section
);
3344 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3346 printf_filtered ("Section %s, loaded at ", name
);
3347 deprecated_print_address_numeric (lma
, 1, gdb_stdout
);
3348 puts_filtered (" - ");
3349 deprecated_print_address_numeric (lma
+ size
, 1, gdb_stdout
);
3350 printf_filtered (", mapped at ");
3351 deprecated_print_address_numeric (vma
, 1, gdb_stdout
);
3352 puts_filtered (" - ");
3353 deprecated_print_address_numeric (vma
+ size
, 1, gdb_stdout
);
3354 puts_filtered ("\n");
3359 printf_filtered (_("No sections are mapped.\n"));
3362 /* Function: map_overlay_command
3363 Mark the named section as mapped (ie. residing at its VMA address). */
3366 map_overlay_command (char *args
, int from_tty
)
3368 struct objfile
*objfile
, *objfile2
;
3369 struct obj_section
*sec
, *sec2
;
3372 if (!overlay_debugging
)
3374 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3375 the 'overlay manual' command."));
3377 if (args
== 0 || *args
== 0)
3378 error (_("Argument required: name of an overlay section"));
3380 /* First, find a section matching the user supplied argument */
3381 ALL_OBJSECTIONS (objfile
, sec
)
3382 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3384 /* Now, check to see if the section is an overlay. */
3385 bfdsec
= sec
->the_bfd_section
;
3386 if (!section_is_overlay (bfdsec
))
3387 continue; /* not an overlay section */
3389 /* Mark the overlay as "mapped" */
3390 sec
->ovly_mapped
= 1;
3392 /* Next, make a pass and unmap any sections that are
3393 overlapped by this new section: */
3394 ALL_OBJSECTIONS (objfile2
, sec2
)
3395 if (sec2
->ovly_mapped
3397 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3398 && sections_overlap (sec
->the_bfd_section
,
3399 sec2
->the_bfd_section
))
3402 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3403 bfd_section_name (objfile
->obfd
,
3404 sec2
->the_bfd_section
));
3405 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3409 error (_("No overlay section called %s"), args
);
3412 /* Function: unmap_overlay_command
3413 Mark the overlay section as unmapped
3414 (ie. resident in its LMA address range, rather than the VMA range). */
3417 unmap_overlay_command (char *args
, int from_tty
)
3419 struct objfile
*objfile
;
3420 struct obj_section
*sec
;
3422 if (!overlay_debugging
)
3424 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3425 the 'overlay manual' command."));
3427 if (args
== 0 || *args
== 0)
3428 error (_("Argument required: name of an overlay section"));
3430 /* First, find a section matching the user supplied argument */
3431 ALL_OBJSECTIONS (objfile
, sec
)
3432 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3434 if (!sec
->ovly_mapped
)
3435 error (_("Section %s is not mapped"), args
);
3436 sec
->ovly_mapped
= 0;
3439 error (_("No overlay section called %s"), args
);
3442 /* Function: overlay_auto_command
3443 A utility command to turn on overlay debugging.
3444 Possibly this should be done via a set/show command. */
3447 overlay_auto_command (char *args
, int from_tty
)
3449 overlay_debugging
= ovly_auto
;
3450 enable_overlay_breakpoints ();
3452 printf_unfiltered (_("Automatic overlay debugging enabled."));
3455 /* Function: overlay_manual_command
3456 A utility command to turn on overlay debugging.
3457 Possibly this should be done via a set/show command. */
3460 overlay_manual_command (char *args
, int from_tty
)
3462 overlay_debugging
= ovly_on
;
3463 disable_overlay_breakpoints ();
3465 printf_unfiltered (_("Overlay debugging enabled."));
3468 /* Function: overlay_off_command
3469 A utility command to turn on overlay debugging.
3470 Possibly this should be done via a set/show command. */
3473 overlay_off_command (char *args
, int from_tty
)
3475 overlay_debugging
= ovly_off
;
3476 disable_overlay_breakpoints ();
3478 printf_unfiltered (_("Overlay debugging disabled."));
3482 overlay_load_command (char *args
, int from_tty
)
3484 if (target_overlay_update
)
3485 (*target_overlay_update
) (NULL
);
3487 error (_("This target does not know how to read its overlay state."));
3490 /* Function: overlay_command
3491 A place-holder for a mis-typed command */
3493 /* Command list chain containing all defined "overlay" subcommands. */
3494 struct cmd_list_element
*overlaylist
;
3497 overlay_command (char *args
, int from_tty
)
3500 ("\"overlay\" must be followed by the name of an overlay command.\n");
3501 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3505 /* Target Overlays for the "Simplest" overlay manager:
3507 This is GDB's default target overlay layer. It works with the
3508 minimal overlay manager supplied as an example by Cygnus. The
3509 entry point is via a function pointer "target_overlay_update",
3510 so targets that use a different runtime overlay manager can
3511 substitute their own overlay_update function and take over the
3514 The overlay_update function pokes around in the target's data structures
3515 to see what overlays are mapped, and updates GDB's overlay mapping with
3518 In this simple implementation, the target data structures are as follows:
3519 unsigned _novlys; /# number of overlay sections #/
3520 unsigned _ovly_table[_novlys][4] = {
3521 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3522 {..., ..., ..., ...},
3524 unsigned _novly_regions; /# number of overlay regions #/
3525 unsigned _ovly_region_table[_novly_regions][3] = {
3526 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3529 These functions will attempt to update GDB's mappedness state in the
3530 symbol section table, based on the target's mappedness state.
3532 To do this, we keep a cached copy of the target's _ovly_table, and
3533 attempt to detect when the cached copy is invalidated. The main
3534 entry point is "simple_overlay_update(SECT), which looks up SECT in
3535 the cached table and re-reads only the entry for that section from
3536 the target (whenever possible).
3539 /* Cached, dynamically allocated copies of the target data structures: */
3540 static unsigned (*cache_ovly_table
)[4] = 0;
3542 static unsigned (*cache_ovly_region_table
)[3] = 0;
3544 static unsigned cache_novlys
= 0;
3546 static unsigned cache_novly_regions
= 0;
3548 static CORE_ADDR cache_ovly_table_base
= 0;
3550 static CORE_ADDR cache_ovly_region_table_base
= 0;
3554 VMA
, SIZE
, LMA
, MAPPED
3556 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3558 /* Throw away the cached copy of _ovly_table */
3560 simple_free_overlay_table (void)
3562 if (cache_ovly_table
)
3563 xfree (cache_ovly_table
);
3565 cache_ovly_table
= NULL
;
3566 cache_ovly_table_base
= 0;
3570 /* Throw away the cached copy of _ovly_region_table */
3572 simple_free_overlay_region_table (void)
3574 if (cache_ovly_region_table
)
3575 xfree (cache_ovly_region_table
);
3576 cache_novly_regions
= 0;
3577 cache_ovly_region_table
= NULL
;
3578 cache_ovly_region_table_base
= 0;
3582 /* Read an array of ints from the target into a local buffer.
3583 Convert to host order. int LEN is number of ints */
3585 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3587 /* FIXME (alloca): Not safe if array is very large. */
3588 gdb_byte
*buf
= alloca (len
* TARGET_LONG_BYTES
);
3591 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3592 for (i
= 0; i
< len
; i
++)
3593 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3597 /* Find and grab a copy of the target _ovly_table
3598 (and _novlys, which is needed for the table's size) */
3600 simple_read_overlay_table (void)
3602 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3604 simple_free_overlay_table ();
3605 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3608 error (_("Error reading inferior's overlay table: "
3609 "couldn't find `_novlys' variable\n"
3610 "in inferior. Use `overlay manual' mode."));
3614 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3615 if (! ovly_table_msym
)
3617 error (_("Error reading inferior's overlay table: couldn't find "
3618 "`_ovly_table' array\n"
3619 "in inferior. Use `overlay manual' mode."));
3623 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3625 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3626 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3627 read_target_long_array (cache_ovly_table_base
,
3628 (unsigned int *) cache_ovly_table
,
3631 return 1; /* SUCCESS */
3635 /* Find and grab a copy of the target _ovly_region_table
3636 (and _novly_regions, which is needed for the table's size) */
3638 simple_read_overlay_region_table (void)
3640 struct minimal_symbol
*msym
;
3642 simple_free_overlay_region_table ();
3643 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3645 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3647 return 0; /* failure */
3648 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3649 if (cache_ovly_region_table
!= NULL
)
3651 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3654 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3655 read_target_long_array (cache_ovly_region_table_base
,
3656 (unsigned int *) cache_ovly_region_table
,
3657 cache_novly_regions
* 3);
3660 return 0; /* failure */
3663 return 0; /* failure */
3664 return 1; /* SUCCESS */
3668 /* Function: simple_overlay_update_1
3669 A helper function for simple_overlay_update. Assuming a cached copy
3670 of _ovly_table exists, look through it to find an entry whose vma,
3671 lma and size match those of OSECT. Re-read the entry and make sure
3672 it still matches OSECT (else the table may no longer be valid).
3673 Set OSECT's mapped state to match the entry. Return: 1 for
3674 success, 0 for failure. */
3677 simple_overlay_update_1 (struct obj_section
*osect
)
3680 bfd
*obfd
= osect
->objfile
->obfd
;
3681 asection
*bsect
= osect
->the_bfd_section
;
3683 size
= bfd_get_section_size (osect
->the_bfd_section
);
3684 for (i
= 0; i
< cache_novlys
; i
++)
3685 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3686 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3687 /* && cache_ovly_table[i][SIZE] == size */ )
3689 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3690 (unsigned int *) cache_ovly_table
[i
], 4);
3691 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3692 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3693 /* && cache_ovly_table[i][SIZE] == size */ )
3695 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3698 else /* Warning! Warning! Target's ovly table has changed! */
3704 /* Function: simple_overlay_update
3705 If OSECT is NULL, then update all sections' mapped state
3706 (after re-reading the entire target _ovly_table).
3707 If OSECT is non-NULL, then try to find a matching entry in the
3708 cached ovly_table and update only OSECT's mapped state.
3709 If a cached entry can't be found or the cache isn't valid, then
3710 re-read the entire cache, and go ahead and update all sections. */
3713 simple_overlay_update (struct obj_section
*osect
)
3715 struct objfile
*objfile
;
3717 /* Were we given an osect to look up? NULL means do all of them. */
3719 /* Have we got a cached copy of the target's overlay table? */
3720 if (cache_ovly_table
!= NULL
)
3721 /* Does its cached location match what's currently in the symtab? */
3722 if (cache_ovly_table_base
==
3723 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3724 /* Then go ahead and try to look up this single section in the cache */
3725 if (simple_overlay_update_1 (osect
))
3726 /* Found it! We're done. */
3729 /* Cached table no good: need to read the entire table anew.
3730 Or else we want all the sections, in which case it's actually
3731 more efficient to read the whole table in one block anyway. */
3733 if (! simple_read_overlay_table ())
3736 /* Now may as well update all sections, even if only one was requested. */
3737 ALL_OBJSECTIONS (objfile
, osect
)
3738 if (section_is_overlay (osect
->the_bfd_section
))
3741 bfd
*obfd
= osect
->objfile
->obfd
;
3742 asection
*bsect
= osect
->the_bfd_section
;
3744 size
= bfd_get_section_size (bsect
);
3745 for (i
= 0; i
< cache_novlys
; i
++)
3746 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3747 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3748 /* && cache_ovly_table[i][SIZE] == size */ )
3749 { /* obj_section matches i'th entry in ovly_table */
3750 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3751 break; /* finished with inner for loop: break out */
3756 /* Set the output sections and output offsets for section SECTP in
3757 ABFD. The relocation code in BFD will read these offsets, so we
3758 need to be sure they're initialized. We map each section to itself,
3759 with no offset; this means that SECTP->vma will be honored. */
3762 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3764 sectp
->output_section
= sectp
;
3765 sectp
->output_offset
= 0;
3768 /* Relocate the contents of a debug section SECTP in ABFD. The
3769 contents are stored in BUF if it is non-NULL, or returned in a
3770 malloc'd buffer otherwise.
3772 For some platforms and debug info formats, shared libraries contain
3773 relocations against the debug sections (particularly for DWARF-2;
3774 one affected platform is PowerPC GNU/Linux, although it depends on
3775 the version of the linker in use). Also, ELF object files naturally
3776 have unresolved relocations for their debug sections. We need to apply
3777 the relocations in order to get the locations of symbols correct. */
3780 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3782 /* We're only interested in debugging sections with relocation
3784 if ((sectp
->flags
& SEC_RELOC
) == 0)
3786 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3789 /* We will handle section offsets properly elsewhere, so relocate as if
3790 all sections begin at 0. */
3791 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3793 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
3797 _initialize_symfile (void)
3799 struct cmd_list_element
*c
;
3801 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
3802 Load symbol table from executable file FILE.\n\
3803 The `file' command can also load symbol tables, as well as setting the file\n\
3804 to execute."), &cmdlist
);
3805 set_cmd_completer (c
, filename_completer
);
3807 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
3808 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
3809 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3810 ADDR is the starting address of the file's text.\n\
3811 The optional arguments are section-name section-address pairs and\n\
3812 should be specified if the data and bss segments are not contiguous\n\
3813 with the text. SECT is a section name to be loaded at SECT_ADDR."),
3815 set_cmd_completer (c
, filename_completer
);
3817 c
= add_cmd ("add-shared-symbol-files", class_files
,
3818 add_shared_symbol_files_command
, _("\
3819 Load the symbols from shared objects in the dynamic linker's link map."),
3821 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3824 c
= add_cmd ("load", class_files
, load_command
, _("\
3825 Dynamically load FILE into the running program, and record its symbols\n\
3826 for access from GDB.\n\
3827 A load OFFSET may also be given."), &cmdlist
);
3828 set_cmd_completer (c
, filename_completer
);
3830 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
3831 &symbol_reloading
, _("\
3832 Set dynamic symbol table reloading multiple times in one run."), _("\
3833 Show dynamic symbol table reloading multiple times in one run."), NULL
,
3835 show_symbol_reloading
,
3836 &setlist
, &showlist
);
3838 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3839 _("Commands for debugging overlays."), &overlaylist
,
3840 "overlay ", 0, &cmdlist
);
3842 add_com_alias ("ovly", "overlay", class_alias
, 1);
3843 add_com_alias ("ov", "overlay", class_alias
, 1);
3845 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3846 _("Assert that an overlay section is mapped."), &overlaylist
);
3848 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3849 _("Assert that an overlay section is unmapped."), &overlaylist
);
3851 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3852 _("List mappings of overlay sections."), &overlaylist
);
3854 add_cmd ("manual", class_support
, overlay_manual_command
,
3855 _("Enable overlay debugging."), &overlaylist
);
3856 add_cmd ("off", class_support
, overlay_off_command
,
3857 _("Disable overlay debugging."), &overlaylist
);
3858 add_cmd ("auto", class_support
, overlay_auto_command
,
3859 _("Enable automatic overlay debugging."), &overlaylist
);
3860 add_cmd ("load-target", class_support
, overlay_load_command
,
3861 _("Read the overlay mapping state from the target."), &overlaylist
);
3863 /* Filename extension to source language lookup table: */
3864 init_filename_language_table ();
3865 add_setshow_string_noescape_cmd ("extension-language", class_files
,
3867 Set mapping between filename extension and source language."), _("\
3868 Show mapping between filename extension and source language."), _("\
3869 Usage: set extension-language .foo bar"),
3870 set_ext_lang_command
,
3872 &setlist
, &showlist
);
3874 add_info ("extensions", info_ext_lang_command
,
3875 _("All filename extensions associated with a source language."));
3877 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
3878 &debug_file_directory
, _("\
3879 Set the directory where separate debug symbols are searched for."), _("\
3880 Show the directory where separate debug symbols are searched for."), _("\
3881 Separate debug symbols are first searched for in the same\n\
3882 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
3883 and lastly at the path of the directory of the binary with\n\
3884 the global debug-file directory prepended."),
3886 show_debug_file_directory
,
3887 &setlist
, &showlist
);