1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990-1996, 1998, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Support, using pieces from other GDB modules.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 #include "breakpoint.h"
34 #include "complaints.h"
36 #include "inferior.h" /* for write_pc */
37 #include "gdb-stabs.h"
41 #include <sys/types.h>
43 #include "gdb_string.h"
54 /* Some HP-UX related globals to clear when a new "main"
55 symbol file is loaded. HP-specific. */
57 extern int hp_som_som_object_present
;
58 extern int hp_cxx_exception_support_initialized
;
59 #define RESET_HP_UX_GLOBALS() do {\
60 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
61 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
65 int (*ui_load_progress_hook
) (const char *section
, unsigned long num
);
66 void (*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 (*pre_add_symbol_hook
) PARAMS ((char *));
72 void (*post_add_symbol_hook
) PARAMS ((void));
73 void (*target_new_objfile_hook
) PARAMS ((struct objfile
*));
75 /* Global variables owned by this file */
76 int readnow_symbol_files
; /* Read full symbols immediately */
78 struct complaint oldsyms_complaint
=
80 "Replacing old symbols for `%s'", 0, 0
83 struct complaint empty_symtab_complaint
=
85 "Empty symbol table found for `%s'", 0, 0
88 struct complaint unknown_option_complaint
=
90 "Unknown option `%s' ignored", 0, 0
93 /* External variables and functions referenced. */
95 extern int info_verbose
;
97 extern void report_transfer_performance
PARAMS ((unsigned long,
100 /* Functions this file defines */
103 static int simple_read_overlay_region_table
PARAMS ((void));
104 static void simple_free_overlay_region_table
PARAMS ((void));
107 static void set_initial_language
PARAMS ((void));
109 static void load_command
PARAMS ((char *, int));
111 static void add_symbol_file_command
PARAMS ((char *, int));
113 static void add_shared_symbol_files_command
PARAMS ((char *, int));
115 static void cashier_psymtab
PARAMS ((struct partial_symtab
*));
117 static int compare_psymbols
PARAMS ((const void *, const void *));
119 static int compare_symbols
PARAMS ((const void *, const void *));
121 bfd
*symfile_bfd_open
PARAMS ((char *));
123 static void find_sym_fns
PARAMS ((struct objfile
*));
125 static void decrement_reading_symtab
PARAMS ((void *));
127 static void overlay_invalidate_all
PARAMS ((void));
129 static int overlay_is_mapped
PARAMS ((struct obj_section
*));
131 void list_overlays_command
PARAMS ((char *, int));
133 void map_overlay_command
PARAMS ((char *, int));
135 void unmap_overlay_command
PARAMS ((char *, int));
137 static void overlay_auto_command
PARAMS ((char *, int));
139 static void overlay_manual_command
PARAMS ((char *, int));
141 static void overlay_off_command
PARAMS ((char *, int));
143 static void overlay_load_command
PARAMS ((char *, int));
145 static void overlay_command
PARAMS ((char *, int));
147 static void simple_free_overlay_table
PARAMS ((void));
149 static void read_target_long_array
PARAMS ((CORE_ADDR
, unsigned int *, int));
151 static int simple_read_overlay_table
PARAMS ((void));
153 static int simple_overlay_update_1
PARAMS ((struct obj_section
*));
155 static void add_filename_language
PARAMS ((char *ext
, enum language lang
));
157 static void set_ext_lang_command
PARAMS ((char *args
, int from_tty
));
159 static void info_ext_lang_command
PARAMS ((char *args
, int from_tty
));
161 static void init_filename_language_table
PARAMS ((void));
163 void _initialize_symfile
PARAMS ((void));
165 /* List of all available sym_fns. On gdb startup, each object file reader
166 calls add_symtab_fns() to register information on each format it is
169 static struct sym_fns
*symtab_fns
= NULL
;
171 /* Flag for whether user will be reloading symbols multiple times.
172 Defaults to ON for VxWorks, otherwise OFF. */
174 #ifdef SYMBOL_RELOADING_DEFAULT
175 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
177 int symbol_reloading
= 0;
180 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
181 this variable is interpreted as a threshhold. If adding a new
182 library's symbol table to those already known to the debugger would
183 exceed this threshhold, then the shlib's symbols are not added.
185 If non-zero on other platforms, shared library symbols will be added
186 automatically when the inferior is created, new libraries are loaded,
187 or when attaching to the inferior. This is almost always what users
188 will want to have happen; but for very large programs, the startup
189 time will be excessive, and so if this is a problem, the user can
190 clear this flag and then add the shared library symbols as needed.
191 Note that there is a potential for confusion, since if the shared
192 library symbols are not loaded, commands like "info fun" will *not*
193 report all the functions that are actually present.
195 Note that HP-UX interprets this variable to mean, "threshhold size
196 in megabytes, where zero means never add". Other platforms interpret
197 this variable to mean, "always add if non-zero, never add if zero."
200 int auto_solib_add
= 1;
203 /* Since this function is called from within qsort, in an ANSI environment
204 it must conform to the prototype for qsort, which specifies that the
205 comparison function takes two "void *" pointers. */
208 compare_symbols (s1p
, s2p
)
212 register struct symbol
**s1
, **s2
;
214 s1
= (struct symbol
**) s1p
;
215 s2
= (struct symbol
**) s2p
;
217 return (STRCMP (SYMBOL_NAME (*s1
), SYMBOL_NAME (*s2
)));
224 compare_psymbols -- compare two partial symbols by name
228 Given pointers to pointers to two partial symbol table entries,
229 compare them by name and return -N, 0, or +N (ala strcmp).
230 Typically used by sorting routines like qsort().
234 Does direct compare of first two characters before punting
235 and passing to strcmp for longer compares. Note that the
236 original version had a bug whereby two null strings or two
237 identically named one character strings would return the
238 comparison of memory following the null byte.
243 compare_psymbols (s1p
, s2p
)
247 register char *st1
= SYMBOL_NAME (*(struct partial_symbol
**) s1p
);
248 register char *st2
= SYMBOL_NAME (*(struct partial_symbol
**) s2p
);
250 if ((st1
[0] - st2
[0]) || !st1
[0])
252 return (st1
[0] - st2
[0]);
254 else if ((st1
[1] - st2
[1]) || !st1
[1])
256 return (st1
[1] - st2
[1]);
260 /* Note: I replaced the STRCMP line (commented out below)
261 * with a simpler "strcmp()" which compares the 2 strings
262 * from the beginning. (STRCMP is a macro which first compares
263 * the initial characters, then falls back on strcmp).
264 * The reason is that the STRCMP line was tickling a C compiler
265 * bug on HP-UX 10.30, which is avoided with the simpler
266 * code. The performance gain from the more complicated code
267 * is negligible, given that we have already checked the
268 * initial 2 characters above. I reported the compiler bug,
269 * and once it is fixed the original line can be put back. RT
271 /* return ( STRCMP (st1 + 2, st2 + 2)); */
272 return (strcmp (st1
, st2
));
277 sort_pst_symbols (pst
)
278 struct partial_symtab
*pst
;
280 /* Sort the global list; don't sort the static list */
282 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
283 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
287 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
291 register struct block
*b
;
293 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
294 sizeof (struct symbol
*), compare_symbols
);
297 /* Call sort_symtab_syms to sort alphabetically
298 the symbols of each block of one symtab. */
302 register struct symtab
*s
;
304 register struct blockvector
*bv
;
307 register struct block
*b
;
311 bv
= BLOCKVECTOR (s
);
312 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
313 for (i
= 0; i
< nbl
; i
++)
315 b
= BLOCKVECTOR_BLOCK (bv
, i
);
316 if (BLOCK_SHOULD_SORT (b
))
321 /* Make a null terminated copy of the string at PTR with SIZE characters in
322 the obstack pointed to by OBSTACKP . Returns the address of the copy.
323 Note that the string at PTR does not have to be null terminated, I.E. it
324 may be part of a larger string and we are only saving a substring. */
327 obsavestring (ptr
, size
, obstackp
)
330 struct obstack
*obstackp
;
332 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
333 /* Open-coded memcpy--saves function call time. These strings are usually
334 short. FIXME: Is this really still true with a compiler that can
337 register char *p1
= ptr
;
338 register char *p2
= p
;
339 char *end
= ptr
+ size
;
347 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
348 in the obstack pointed to by OBSTACKP. */
351 obconcat (obstackp
, s1
, s2
, s3
)
352 struct obstack
*obstackp
;
353 const char *s1
, *s2
, *s3
;
355 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
356 register char *val
= (char *) obstack_alloc (obstackp
, len
);
363 /* True if we are nested inside psymtab_to_symtab. */
365 int currently_reading_symtab
= 0;
368 decrement_reading_symtab (dummy
)
371 currently_reading_symtab
--;
374 /* Get the symbol table that corresponds to a partial_symtab.
375 This is fast after the first time you do it. In fact, there
376 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
380 psymtab_to_symtab (pst
)
381 register struct partial_symtab
*pst
;
383 /* If it's been looked up before, return it. */
387 /* If it has not yet been read in, read it. */
390 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
391 currently_reading_symtab
++;
392 (*pst
->read_symtab
) (pst
);
393 do_cleanups (back_to
);
399 /* Initialize entry point information for this objfile. */
402 init_entry_point_info (objfile
)
403 struct objfile
*objfile
;
405 /* Save startup file's range of PC addresses to help blockframe.c
406 decide where the bottom of the stack is. */
408 if (bfd_get_file_flags (objfile
->obfd
) & EXEC_P
)
410 /* Executable file -- record its entry point so we'll recognize
411 the startup file because it contains the entry point. */
412 objfile
->ei
.entry_point
= bfd_get_start_address (objfile
->obfd
);
416 /* Examination of non-executable.o files. Short-circuit this stuff. */
417 objfile
->ei
.entry_point
= INVALID_ENTRY_POINT
;
419 objfile
->ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
420 objfile
->ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
421 objfile
->ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
422 objfile
->ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
423 objfile
->ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
424 objfile
->ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
427 /* Get current entry point address. */
430 entry_point_address ()
432 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
435 /* Remember the lowest-addressed loadable section we've seen.
436 This function is called via bfd_map_over_sections.
438 In case of equal vmas, the section with the largest size becomes the
439 lowest-addressed loadable section.
441 If the vmas and sizes are equal, the last section is considered the
442 lowest-addressed loadable section. */
445 find_lowest_section (abfd
, sect
, obj
)
450 asection
**lowest
= (asection
**) obj
;
452 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
455 *lowest
= sect
; /* First loadable section */
456 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
457 *lowest
= sect
; /* A lower loadable section */
458 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
459 && (bfd_section_size (abfd
, (*lowest
))
460 <= bfd_section_size (abfd
, sect
)))
464 /* Parse the user's idea of an offset for dynamic linking, into our idea
465 of how to represent it for fast symbol reading. This is the default
466 version of the sym_fns.sym_offsets function for symbol readers that
467 don't need to do anything special. It allocates a section_offsets table
468 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
471 default_symfile_offsets (objfile
, addrs
)
472 struct objfile
*objfile
;
473 struct section_addr_info
*addrs
;
477 objfile
->num_sections
= SECT_OFF_MAX
;
478 objfile
->section_offsets
= (struct section_offsets
*)
479 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
480 memset (objfile
->section_offsets
, 0, SIZEOF_SECTION_OFFSETS
);
482 /* If user explicitly specified values for data and bss, set them here. */
484 if (addrs
->text_addr
)
485 ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT
) = addrs
->text_addr
;
486 if (addrs
->data_addr
)
487 ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA
) = addrs
->data_addr
;
489 ANOFFSET (objfile
->section_offsets
, SECT_OFF_BSS
) = addrs
->bss_addr
;
491 /* Now calculate offsets for other sections. */
492 for (i
= 0; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
494 struct other_sections
*osp
;
496 osp
= &addrs
->other
[i
] ;
497 if (addrs
->other
[i
].addr
== 0)
500 if (strcmp (".text", osp
->name
) == 0)
501 SECT_OFF_TEXT
= osp
->sectindex
;
502 else if (strcmp (".data", osp
->name
) == 0)
503 SECT_OFF_DATA
= osp
->sectindex
;
504 else if (strcmp (".bss", osp
->name
) == 0)
505 SECT_OFF_BSS
= osp
->sectindex
;
507 /* Record all sections in offsets */
508 ANOFFSET (objfile
->section_offsets
, osp
->sectindex
) = osp
->addr
;
513 /* Process a symbol file, as either the main file or as a dynamically
516 OBJFILE is where the symbols are to be read from.
518 ADDR is the address where the text segment was loaded, unless the
519 objfile is the main symbol file, in which case it is zero.
521 MAINLINE is nonzero if this is the main symbol file, or zero if
522 it's an extra symbol file such as dynamically loaded code.
524 VERBO is nonzero if the caller has printed a verbose message about
525 the symbol reading (and complaints can be more terse about it). */
528 syms_from_objfile (objfile
, addrs
, mainline
, verbo
)
529 struct objfile
*objfile
;
530 struct section_addr_info
*addrs
;
534 struct section_offsets
*section_offsets
;
535 asection
*lower_sect
;
537 CORE_ADDR lower_offset
;
538 struct section_addr_info local_addr
;
539 struct cleanup
*old_chain
;
542 /* If ADDRS is NULL, initialize the local section_addr_info struct and
543 point ADDRS to it. We now establish the convention that an addr of
544 zero means no load address was specified. */
548 memset (&local_addr
, 0, sizeof (local_addr
));
552 init_entry_point_info (objfile
);
553 find_sym_fns (objfile
);
555 /* Make sure that partially constructed symbol tables will be cleaned up
556 if an error occurs during symbol reading. */
557 old_chain
= make_cleanup ((make_cleanup_func
) free_objfile
, objfile
);
561 /* We will modify the main symbol table, make sure that all its users
562 will be cleaned up if an error occurs during symbol reading. */
563 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
565 /* Since no error yet, throw away the old symbol table. */
567 if (symfile_objfile
!= NULL
)
569 free_objfile (symfile_objfile
);
570 symfile_objfile
= NULL
;
573 /* Currently we keep symbols from the add-symbol-file command.
574 If the user wants to get rid of them, they should do "symbol-file"
575 without arguments first. Not sure this is the best behavior
578 (*objfile
->sf
->sym_new_init
) (objfile
);
581 /* Convert addr into an offset rather than an absolute address.
582 We find the lowest address of a loaded segment in the objfile,
583 and assume that <addr> is where that got loaded.
585 We no longer warn if the lowest section is not a text segment (as
586 happens for the PA64 port. */
589 /* No offset from objfile addresses. */
590 addrs
-> text_addr
= 0;
591 addrs
-> data_addr
= 0;
592 addrs
-> bss_addr
= 0;
596 /* Find lowest loadable section to be used as starting point for
597 continguous sections. FIXME!! won't work without call to find
598 .text first, but this assumes text is lowest section. */
599 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
600 if (lower_sect
== NULL
)
601 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
603 if (lower_sect
== NULL
)
604 warning ("no loadable sections found in added symbol-file %s",
606 else if ((bfd_get_section_flags (objfile
->obfd
, lower_sect
) & SEC_CODE
)
608 warning ("Lowest section in %s is %s at %s",
610 bfd_section_name (objfile
->obfd
, lower_sect
),
611 paddr (bfd_section_vma (objfile
->obfd
, lower_sect
)));
612 if (lower_sect
!= NULL
)
613 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
617 /* Calculate offsets for the loadable sections.
618 FIXME! Sections must be in order of increasing loadable section
619 so that contiguous sections can use the lower-offset!!!
621 Adjust offsets if the segments are not contiguous.
622 If the section is contiguous, its offset should be set to
623 the offset of the highest loadable section lower than it
624 (the loadable section directly below it in memory).
625 this_offset = lower_offset = lower_addr - lower_orig_addr */
627 /* FIXME: These sections will not need special treatment because ALL
628 sections are in the other sections table */
630 if (addrs
->text_addr
!= 0)
632 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
635 addrs
->text_addr
-= bfd_section_vma (objfile
->obfd
, sect
);
636 lower_offset
= addrs
->text_addr
;
640 /* ??? who's below me? */
641 addrs
->text_addr
= lower_offset
;
643 if (addrs
->data_addr
!= 0)
645 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
648 addrs
->data_addr
-= bfd_section_vma (objfile
->obfd
, sect
);
649 lower_offset
= addrs
->data_addr
;
653 addrs
->data_addr
= lower_offset
;
655 if (addrs
->bss_addr
!= 0)
657 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
660 addrs
->bss_addr
-= bfd_section_vma (objfile
->obfd
, sect
);
661 lower_offset
= addrs
->bss_addr
;
665 addrs
->bss_addr
= lower_offset
;
667 /* Now calculate offsets for other sections. */
668 for (i
=0 ; i
< MAX_SECTIONS
&& addrs
->other
[i
].name
; i
++)
671 if (addrs
->other
[i
].addr
!= 0)
673 sect
=bfd_get_section_by_name(objfile
->obfd
, addrs
->other
[i
].name
);
676 addrs
->other
[i
].addr
-= bfd_section_vma (objfile
->obfd
, sect
);
677 lower_offset
= addrs
->other
[i
].addr
;
678 addrs
->other
[i
].sectindex
= sect
->index
;
682 warning ("section %s not found in %s", addrs
->other
[i
].name
,
684 addrs
->other
[i
].addr
= 0;
688 addrs
->other
[i
].addr
= lower_offset
;
692 /* Initialize symbol reading routines for this objfile, allow complaints to
693 appear for this new file, and record how verbose to be, then do the
694 initial symbol reading for this file. */
696 (*objfile
->sf
->sym_init
) (objfile
);
697 clear_complaints (1, verbo
);
699 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
701 #ifndef IBM6000_TARGET
702 /* This is a SVR4/SunOS specific hack, I think. In any event, it
703 screws RS/6000. sym_offsets should be doing this sort of thing,
704 because it knows the mapping between bfd sections and
706 /* This is a hack. As far as I can tell, section offsets are not
707 target dependent. They are all set to addr with a couple of
708 exceptions. The exceptions are sysvr4 shared libraries, whose
709 offsets are kept in solib structures anyway and rs6000 xcoff
710 which handles shared libraries in a completely unique way.
712 Section offsets are built similarly, except that they are built
713 by adding addr in all cases because there is no clear mapping
714 from section_offsets into actual sections. Note that solib.c
715 has a different algorithm for finding section offsets.
717 These should probably all be collapsed into some target
718 independent form of shared library support. FIXME. */
722 struct obj_section
*s
;
724 /* Map section offsets in "addr" back to the object's
725 sections by comparing the section names with bfd's
726 section names. Then adjust the section address by
727 the offset. */ /* for gdb/13815 */
729 ALL_OBJFILE_OSECTIONS (objfile
, s
)
731 CORE_ADDR s_addr
= 0;
734 if (strcmp (s
->the_bfd_section
->name
, ".text") == 0)
735 s_addr
= addrs
->text_addr
;
736 else if (strcmp (s
->the_bfd_section
->name
, ".data") == 0)
737 s_addr
= addrs
->data_addr
;
738 else if (strcmp (s
->the_bfd_section
->name
, ".bss") == 0)
739 s_addr
= addrs
->bss_addr
;
741 for (i
= 0; !s_addr
&& addrs
->other
[i
].name
; i
++)
742 if (strcmp (s
->the_bfd_section
->name
, addrs
->other
[i
].name
) == 0)
743 s_addr
= addrs
->other
[i
].addr
; /* end added for gdb/13815 */
745 s
->addr
-= s
->offset
;
747 s
->endaddr
-= s
->offset
;
748 s
->endaddr
+= s_addr
;
752 #endif /* not IBM6000_TARGET */
754 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
756 if (!have_partial_symbols () && !have_full_symbols ())
759 printf_filtered ("(no debugging symbols found)...");
763 /* Don't allow char * to have a typename (else would get caddr_t).
764 Ditto void *. FIXME: Check whether this is now done by all the
765 symbol readers themselves (many of them now do), and if so remove
768 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
769 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
771 /* Mark the objfile has having had initial symbol read attempted. Note
772 that this does not mean we found any symbols... */
774 objfile
->flags
|= OBJF_SYMS
;
776 /* Discard cleanups as symbol reading was successful. */
778 discard_cleanups (old_chain
);
780 /* Call this after reading in a new symbol table to give target
781 dependant code a crack at the new symbols. For instance, this
782 could be used to update the values of target-specific symbols GDB
783 needs to keep track of (such as _sigtramp, or whatever). */
785 TARGET_SYMFILE_POSTREAD (objfile
);
788 /* Perform required actions after either reading in the initial
789 symbols for a new objfile, or mapping in the symbols from a reusable
793 new_symfile_objfile (objfile
, mainline
, verbo
)
794 struct objfile
*objfile
;
799 /* If this is the main symbol file we have to clean up all users of the
800 old main symbol file. Otherwise it is sufficient to fixup all the
801 breakpoints that may have been redefined by this symbol file. */
804 /* OK, make it the "real" symbol file. */
805 symfile_objfile
= objfile
;
807 clear_symtab_users ();
811 breakpoint_re_set ();
814 /* We're done reading the symbol file; finish off complaints. */
815 clear_complaints (0, verbo
);
818 /* Process a symbol file, as either the main file or as a dynamically
821 NAME is the file name (which will be tilde-expanded and made
822 absolute herein) (but we don't free or modify NAME itself).
823 FROM_TTY says how verbose to be. MAINLINE specifies whether this
824 is the main symbol file, or whether it's an extra symbol file such
825 as dynamically loaded code. If !mainline, ADDR is the address
826 where the text segment was loaded.
828 Upon success, returns a pointer to the objfile that was added.
829 Upon failure, jumps back to command level (never returns). */
832 symbol_file_add (name
, from_tty
, addrs
, mainline
, flags
)
835 struct section_addr_info
*addrs
;
839 struct objfile
*objfile
;
840 struct partial_symtab
*psymtab
;
843 /* Open a bfd for the file, and give user a chance to burp if we'd be
844 interactively wiping out any existing symbols. */
846 abfd
= symfile_bfd_open (name
);
848 if ((have_full_symbols () || have_partial_symbols ())
851 && !query ("Load new symbol table from \"%s\"? ", name
))
852 error ("Not confirmed.");
854 objfile
= allocate_objfile (abfd
, flags
);
856 /* If the objfile uses a mapped symbol file, and we have a psymtab for
857 it, then skip reading any symbols at this time. */
859 if ((objfile
->flags
& OBJF_MAPPED
) && (objfile
->flags
& OBJF_SYMS
))
861 /* We mapped in an existing symbol table file that already has had
862 initial symbol reading performed, so we can skip that part. Notify
863 the user that instead of reading the symbols, they have been mapped.
865 if (from_tty
|| info_verbose
)
867 printf_filtered ("Mapped symbols for %s...", name
);
869 gdb_flush (gdb_stdout
);
871 init_entry_point_info (objfile
);
872 find_sym_fns (objfile
);
876 /* We either created a new mapped symbol table, mapped an existing
877 symbol table file which has not had initial symbol reading
878 performed, or need to read an unmapped symbol table. */
879 if (from_tty
|| info_verbose
)
881 if (pre_add_symbol_hook
)
882 pre_add_symbol_hook (name
);
885 printf_filtered ("Reading symbols from %s...", name
);
887 gdb_flush (gdb_stdout
);
890 syms_from_objfile (objfile
, addrs
, mainline
, from_tty
);
893 /* We now have at least a partial symbol table. Check to see if the
894 user requested that all symbols be read on initial access via either
895 the gdb startup command line or on a per symbol file basis. Expand
896 all partial symbol tables for this objfile if so. */
898 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
900 if (from_tty
|| info_verbose
)
902 printf_filtered ("expanding to full symbols...");
904 gdb_flush (gdb_stdout
);
907 for (psymtab
= objfile
->psymtabs
;
909 psymtab
= psymtab
->next
)
911 psymtab_to_symtab (psymtab
);
915 if (from_tty
|| info_verbose
)
917 if (post_add_symbol_hook
)
918 post_add_symbol_hook ();
921 printf_filtered ("done.\n");
922 gdb_flush (gdb_stdout
);
926 new_symfile_objfile (objfile
, mainline
, from_tty
);
928 if (target_new_objfile_hook
)
929 target_new_objfile_hook (objfile
);
934 /* This is the symbol-file command. Read the file, analyze its
935 symbols, and add a struct symtab to a symtab list. The syntax of
936 the command is rather bizarre--(1) buildargv implements various
937 quoting conventions which are undocumented and have little or
938 nothing in common with the way things are quoted (or not quoted)
939 elsewhere in GDB, (2) options are used, which are not generally
940 used in GDB (perhaps "set mapped on", "set readnow on" would be
941 better), (3) the order of options matters, which is contrary to GNU
942 conventions (because it is confusing and inconvenient). */
945 symbol_file_command (args
, from_tty
)
951 CORE_ADDR text_relocation
= 0; /* text_relocation */
952 struct cleanup
*cleanups
;
953 int flags
= OBJF_USERLOADED
;
959 if ((have_full_symbols () || have_partial_symbols ())
961 && !query ("Discard symbol table from `%s'? ",
962 symfile_objfile
->name
))
963 error ("Not confirmed.");
964 free_all_objfiles ();
966 /* solib descriptors may have handles to objfiles. Since their
967 storage has just been released, we'd better wipe the solib
970 #if defined(SOLIB_RESTART)
974 symfile_objfile
= NULL
;
977 printf_unfiltered ("No symbol file now.\n");
980 RESET_HP_UX_GLOBALS ();
985 if ((argv
= buildargv (args
)) == NULL
)
989 cleanups
= make_cleanup_freeargv (argv
);
990 while (*argv
!= NULL
)
992 if (STREQ (*argv
, "-mapped"))
994 flags
|= OBJF_MAPPED
;
996 else if (STREQ (*argv
, "-readnow"))
998 flags
|= OBJF_READNOW
;
1000 else if (**argv
== '-')
1002 error ("unknown option `%s'", *argv
);
1010 /* this is for rombug remote only, to get the text relocation by
1011 using link command */
1012 p
= strrchr (name
, '/');
1018 target_link (p
, &text_relocation
);
1020 if (text_relocation
== (CORE_ADDR
) 0)
1022 else if (text_relocation
== (CORE_ADDR
) -1)
1024 symbol_file_add (name
, from_tty
, NULL
, 1, flags
);
1026 RESET_HP_UX_GLOBALS ();
1031 struct section_addr_info section_addrs
;
1032 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1033 section_addrs
.text_addr
= (CORE_ADDR
) text_relocation
;
1034 symbol_file_add (name
, from_tty
, §ion_addrs
, 0, flags
);
1037 /* Getting new symbols may change our opinion about what is
1039 reinit_frame_cache ();
1041 set_initial_language ();
1048 error ("no symbol file name was specified");
1050 TUIDO (((TuiOpaqueFuncPtr
) tuiDisplayMainFunction
));
1051 do_cleanups (cleanups
);
1055 /* Set the initial language.
1057 A better solution would be to record the language in the psymtab when reading
1058 partial symbols, and then use it (if known) to set the language. This would
1059 be a win for formats that encode the language in an easily discoverable place,
1060 such as DWARF. For stabs, we can jump through hoops looking for specially
1061 named symbols or try to intuit the language from the specific type of stabs
1062 we find, but we can't do that until later when we read in full symbols.
1066 set_initial_language ()
1068 struct partial_symtab
*pst
;
1069 enum language lang
= language_unknown
;
1071 pst
= find_main_psymtab ();
1074 if (pst
->filename
!= NULL
)
1076 lang
= deduce_language_from_filename (pst
->filename
);
1078 if (lang
== language_unknown
)
1080 /* Make C the default language */
1083 set_language (lang
);
1084 expected_language
= current_language
; /* Don't warn the user */
1088 /* Open file specified by NAME and hand it off to BFD for preliminary
1089 analysis. Result is a newly initialized bfd *, which includes a newly
1090 malloc'd` copy of NAME (tilde-expanded and made absolute).
1091 In case of trouble, error() is called. */
1094 symfile_bfd_open (name
)
1099 char *absolute_name
;
1103 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
1105 /* Look down path for it, allocate 2nd new malloc'd copy. */
1106 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1107 #if defined(__GO32__) || defined(_WIN32)
1110 char *exename
= alloca (strlen (name
) + 5);
1111 strcat (strcpy (exename
, name
), ".exe");
1112 desc
= openp (getenv ("PATH"), 1, exename
, O_RDONLY
| O_BINARY
,
1118 make_cleanup (free
, name
);
1119 perror_with_name (name
);
1121 free (name
); /* Free 1st new malloc'd copy */
1122 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
1123 /* It'll be freed in free_objfile(). */
1125 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
1129 make_cleanup (free
, name
);
1130 error ("\"%s\": can't open to read symbols: %s.", name
,
1131 bfd_errmsg (bfd_get_error ()));
1133 sym_bfd
->cacheable
= true;
1135 if (!bfd_check_format (sym_bfd
, bfd_object
))
1137 /* FIXME: should be checking for errors from bfd_close (for one thing,
1138 on error it does not free all the storage associated with the
1140 bfd_close (sym_bfd
); /* This also closes desc */
1141 make_cleanup (free
, name
);
1142 error ("\"%s\": can't read symbols: %s.", name
,
1143 bfd_errmsg (bfd_get_error ()));
1148 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1149 startup by the _initialize routine in each object file format reader,
1150 to register information about each format the the reader is prepared
1157 sf
->next
= symtab_fns
;
1162 /* Initialize to read symbols from the symbol file sym_bfd. It either
1163 returns or calls error(). The result is an initialized struct sym_fns
1164 in the objfile structure, that contains cached information about the
1168 find_sym_fns (objfile
)
1169 struct objfile
*objfile
;
1172 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
->obfd
);
1173 char *our_target
= bfd_get_target (objfile
->obfd
);
1175 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
1176 if (STREQ (our_target
, "aixcoff-rs6000") ||
1177 STREQ (our_target
, "xcoff-powermac"))
1178 our_flavour
= (enum bfd_flavour
) -1;
1180 /* Special kludge for apollo. See dstread.c. */
1181 if (STREQN (our_target
, "apollo", 6))
1182 our_flavour
= (enum bfd_flavour
) -2;
1184 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1186 if (our_flavour
== sf
->sym_flavour
)
1192 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1193 bfd_get_target (objfile
->obfd
));
1196 /* This function runs the load command of our current target. */
1199 load_command (arg
, from_tty
)
1204 arg
= get_exec_file (1);
1205 target_load (arg
, from_tty
);
1208 /* This version of "load" should be usable for any target. Currently
1209 it is just used for remote targets, not inftarg.c or core files,
1210 on the theory that only in that case is it useful.
1212 Avoiding xmodem and the like seems like a win (a) because we don't have
1213 to worry about finding it, and (b) On VMS, fork() is very slow and so
1214 we don't want to run a subprocess. On the other hand, I'm not sure how
1215 performance compares. */
1217 static int download_write_size
= 512;
1218 static int validate_download
= 0;
1221 generic_load (char *args
, int from_tty
)
1225 time_t start_time
, end_time
; /* Start and end times of download */
1226 unsigned long data_count
= 0; /* Number of bytes transferred to memory */
1227 unsigned long write_count
= 0; /* Number of writes needed. */
1228 unsigned long load_offset
; /* offset to add to vma for each section */
1230 struct cleanup
*old_cleanups
;
1232 CORE_ADDR total_size
= 0;
1233 CORE_ADDR total_sent
= 0;
1235 /* Parse the input argument - the user can specify a load offset as
1236 a second argument. */
1237 filename
= xmalloc (strlen (args
) + 1);
1238 old_cleanups
= make_cleanup (free
, filename
);
1239 strcpy (filename
, args
);
1240 offptr
= strchr (filename
, ' ');
1244 load_offset
= strtoul (offptr
, &endptr
, 0);
1245 if (offptr
== endptr
)
1246 error ("Invalid download offset:%s\n", offptr
);
1252 /* Open the file for loading. */
1253 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1254 if (loadfile_bfd
== NULL
)
1256 perror_with_name (filename
);
1260 /* FIXME: should be checking for errors from bfd_close (for one thing,
1261 on error it does not free all the storage associated with the
1263 make_cleanup ((make_cleanup_func
) bfd_close
, loadfile_bfd
);
1265 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1267 error ("\"%s\" is not an object file: %s", filename
,
1268 bfd_errmsg (bfd_get_error ()));
1271 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1272 if (s
->flags
& SEC_LOAD
)
1273 total_size
+= bfd_get_section_size_before_reloc (s
);
1275 start_time
= time (NULL
);
1277 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
1279 if (s
->flags
& SEC_LOAD
)
1281 CORE_ADDR size
= bfd_get_section_size_before_reloc (s
);
1285 struct cleanup
*old_chain
;
1286 CORE_ADDR lma
= s
->lma
+ load_offset
;
1287 CORE_ADDR block_size
;
1289 const char *sect_name
= bfd_get_section_name (loadfile_bfd
, s
);
1292 if (download_write_size
> 0 && size
> download_write_size
)
1293 block_size
= download_write_size
;
1297 buffer
= xmalloc (size
);
1298 old_chain
= make_cleanup (free
, buffer
);
1300 /* Is this really necessary? I guess it gives the user something
1301 to look at during a long download. */
1303 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1304 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1306 fprintf_unfiltered (gdb_stdout
,
1307 "Loading section %s, size 0x%s lma 0x%s\n",
1308 sect_name
, paddr_nz (size
), paddr_nz (lma
));
1311 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
1317 CORE_ADDR this_transfer
= size
- sent
;
1318 if (this_transfer
>= block_size
)
1319 this_transfer
= block_size
;
1320 len
= target_write_memory_partial (lma
, buffer
,
1321 this_transfer
, &err
);
1324 if (validate_download
)
1326 /* Broken memories and broken monitors manifest
1327 themselves here when bring new computers to
1328 life. This doubles already slow downloads. */
1329 /* NOTE: cagney/1999-10-18: A more efficient
1330 implementation might add a verify_memory()
1331 method to the target vector and then use
1332 that. remote.c could implement that method
1333 using the ``qCRC'' packet. */
1334 char *check
= xmalloc (len
);
1335 struct cleanup
*verify_cleanups
= make_cleanup (free
, check
);
1336 if (target_read_memory (lma
, check
, len
) != 0)
1337 error ("Download verify read failed at 0x%s",
1339 if (memcmp (buffer
, check
, len
) != 0)
1340 error ("Download verify compare failed at 0x%s",
1342 do_cleanups (verify_cleanups
);
1351 || (ui_load_progress_hook
!= NULL
1352 && ui_load_progress_hook (sect_name
, sent
)))
1353 error ("Canceled the download");
1355 if (show_load_progress
!= NULL
)
1356 show_load_progress (sect_name
, sent
, size
, total_sent
, total_size
);
1358 while (sent
< size
);
1361 error ("Memory access error while loading section %s.", sect_name
);
1363 do_cleanups (old_chain
);
1368 end_time
= time (NULL
);
1371 entry
= bfd_get_start_address (loadfile_bfd
);
1373 ui_out_text (uiout
, "Start address ");
1374 ui_out_field_fmt (uiout
, "address", "0x%s" , paddr_nz (entry
));
1375 ui_out_text (uiout
, ", load size ");
1376 ui_out_field_fmt (uiout
, "load-size", "%ld" , data_count
);
1377 ui_out_text (uiout
, "\n");
1380 fprintf_unfiltered (gdb_stdout
,
1381 "Start address 0x%s , load size %ld\n",
1382 paddr_nz (entry
), data_count
);
1384 /* We were doing this in remote-mips.c, I suspect it is right
1385 for other targets too. */
1389 /* FIXME: are we supposed to call symbol_file_add or not? According to
1390 a comment from remote-mips.c (where a call to symbol_file_add was
1391 commented out), making the call confuses GDB if more than one file is
1392 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1395 print_transfer_performance (gdb_stdout
, data_count
, write_count
,
1396 end_time
- start_time
);
1398 do_cleanups (old_cleanups
);
1401 /* Report how fast the transfer went. */
1403 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1404 replaced by print_transfer_performance (with a very different
1405 function signature). */
1408 report_transfer_performance (data_count
, start_time
, end_time
)
1409 unsigned long data_count
;
1410 time_t start_time
, end_time
;
1412 print_transfer_performance (gdb_stdout
, data_count
, end_time
- start_time
, 0);
1416 print_transfer_performance (struct ui_file
*stream
,
1417 unsigned long data_count
,
1418 unsigned long write_count
,
1419 unsigned long time_count
)
1422 ui_out_text (uiout
, "Transfer rate: ");
1425 ui_out_field_fmt (uiout
, "transfer-rate", "%ld",
1426 (data_count
* 8) / time_count
);
1427 ui_out_text (uiout
, " bits/sec");
1431 ui_out_field_fmt (uiout
, "transferred-bits", "%ld", (data_count
* 8));
1432 ui_out_text (uiout
, " bits in <1 sec");
1434 if (write_count
> 0)
1436 ui_out_text (uiout
, ", ");
1437 ui_out_field_fmt (uiout
, "write-rate", "%ld", data_count
/ write_count
);
1438 ui_out_text (uiout
, " bytes/write");
1440 ui_out_text (uiout
, ".\n");
1442 fprintf_unfiltered (stream
, "Transfer rate: ");
1444 fprintf_unfiltered (stream
, "%ld bits/sec", (data_count
* 8) / time_count
);
1446 fprintf_unfiltered (stream
, "%ld bits in <1 sec", (data_count
* 8));
1447 if (write_count
> 0)
1448 fprintf_unfiltered (stream
, ", %ld bytes/write", data_count
/ write_count
);
1449 fprintf_unfiltered (stream
, ".\n");
1453 /* This function allows the addition of incrementally linked object files.
1454 It does not modify any state in the target, only in the debugger. */
1458 add_symbol_file_command (args
, from_tty
)
1463 CORE_ADDR text_addr
;
1464 int flags
= OBJF_USERLOADED
;
1466 int expecting_option
= 0;
1467 int option_index
= 0;
1473 enum { OPT_SECTION
} type
;
1476 } opt
[SECT_OFF_MAX
];
1477 struct section_addr_info section_addrs
;
1483 error ("add-symbol-file takes a file name and an address");
1486 /* Make a copy of the string that we can safely write into. */
1488 args
= xstrdup (args
);
1489 make_cleanup (free
, args
);
1491 /* Ensure section_addrs is initialized */
1492 memset (§ion_addrs
, 0, sizeof (section_addrs
));
1494 /* Pick off any -option args and the file name. */
1496 while (*args
!= '\000')
1498 while (isspace (*args
))
1503 while ((*args
!= '\000') && !isspace (*args
))
1507 if (*args
!= '\000')
1513 if (expecting_option
)
1515 opt
[option_index
++].value
= arg
;
1516 expecting_option
= 0;
1526 opt
[option_index
].type
= OPT_SECTION
;
1527 opt
[option_index
].name
= ".text";
1528 opt
[option_index
++].value
= arg
;
1531 opt
[option_index
].type
= OPT_SECTION
;
1532 opt
[option_index
].name
= ".data";
1533 opt
[option_index
++].value
= arg
;
1536 opt
[option_index
].type
= OPT_SECTION
;
1537 opt
[option_index
].name
= ".bss";
1538 opt
[option_index
++].value
= arg
;
1541 warning ("Too many arguments entered; see \"help add-symbol-file\" for command syntax.");
1546 else if (STREQ (arg
, "-mapped"))
1548 flags
|= OBJF_MAPPED
;
1550 else if (STREQ (arg
, "-readnow"))
1552 flags
|= OBJF_READNOW
;
1554 else if (STREQN (arg
, "-T", 2))
1556 if (option_index
>= SECT_OFF_MAX
)
1558 warning ("Number of options exceeds maximum allowed.");
1562 expecting_option
= 1;
1563 opt
[option_index
].type
= OPT_SECTION
;
1564 opt
[option_index
].name
= arg
+ 2;
1569 error ("Unknown option `%s'", arg
);
1575 error ("add-symbol-file takes a file name");
1577 name
= tilde_expand (name
);
1578 make_cleanup (free
, name
);
1580 if (option_index
> 0)
1582 /* Print the prompt for the query below.
1583 We have to split this up into 3 print statements because
1584 local_hex_string returns a local static string. */
1586 printf_filtered ("add symbol table from file \"%s\" at\n", name
);
1587 for (i
= 0; i
< option_index
; i
++)
1589 switch (opt
[i
].type
)
1594 char *val
= opt
[i
].value
;
1595 char *sec
= opt
[i
].name
;
1598 if (val
[0] == '0' && val
[1] == 'x')
1599 addr
= strtoul (val
+2, NULL
, 16);
1601 addr
= strtoul (val
, NULL
, 10);
1603 if (strcmp (sec
, ".text") == 0)
1604 section_addrs
.text_addr
= addr
;
1605 else if (strcmp (sec
, ".data") == 0)
1606 section_addrs
.data_addr
= addr
;
1607 else if (strcmp (sec
, ".bss") == 0)
1608 section_addrs
.bss_addr
= addr
;
1609 /* Add the section to the others even if it is a
1610 text data or bss section. This is redundent but
1611 eventually, none will be given special treatment */
1613 section_addrs
.other
[sec_num
].name
= xstrdup (sec
);
1614 make_cleanup (free
, section_addrs
.other
[sec_num
].name
);
1615 section_addrs
.other
[sec_num
++].addr
= addr
;
1616 printf_filtered ("\t%s_addr = %s\n",
1618 local_hex_string ((unsigned long)addr
));
1621 /* The object's sections are initialized when a
1622 call is made to build_objfile_section_table (objfile).
1623 This happens in reread_symbols.
1624 At this point, we don't know what file type this is,
1625 so we can't determine what section names are valid. */
1629 complain (&unknown_option_complaint
, opt
[i
].name
);
1632 /* Eventually, these hard coded names will be obsolete */
1633 /* All the addresses will be on the others section */
1637 CORE_ADDR text_addr
;
1638 target_link (name
, &text_addr
);
1639 if (text_addr
== (CORE_ADDR
) -1)
1640 error("Don't know how to get text start location for this file");
1641 section_addrs
.text_addr
= text_addr
;
1642 section_addrs
.data_addr
= 0;
1643 section_addrs
.bss_addr
= 0;
1644 printf_filtered("add symbol table from file \"%s\" at text_addr = %s?\n",
1645 name
, local_hex_string ((unsigned long)text_addr
));
1647 if (from_tty
&& (!query ("%s", "")))
1648 error ("Not confirmed.");
1650 symbol_file_add (name
, from_tty
, §ion_addrs
, 0, flags
);
1652 /* Getting new symbols may change our opinion about what is
1654 reinit_frame_cache ();
1658 add_shared_symbol_files_command (args
, from_tty
)
1662 #ifdef ADD_SHARED_SYMBOL_FILES
1663 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1665 error ("This command is not available in this configuration of GDB.");
1669 /* Re-read symbols if a symbol-file has changed. */
1673 struct objfile
*objfile
;
1676 struct stat new_statbuf
;
1679 /* With the addition of shared libraries, this should be modified,
1680 the load time should be saved in the partial symbol tables, since
1681 different tables may come from different source files. FIXME.
1682 This routine should then walk down each partial symbol table
1683 and see if the symbol table that it originates from has been changed */
1685 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
1689 #ifdef IBM6000_TARGET
1690 /* If this object is from a shared library, then you should
1691 stat on the library name, not member name. */
1693 if (objfile
->obfd
->my_archive
)
1694 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1697 res
= stat (objfile
->name
, &new_statbuf
);
1700 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1701 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1705 new_modtime
= new_statbuf
.st_mtime
;
1706 if (new_modtime
!= objfile
->mtime
)
1708 struct cleanup
*old_cleanups
;
1709 struct section_offsets
*offsets
;
1711 char *obfd_filename
;
1713 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1716 /* There are various functions like symbol_file_add,
1717 symfile_bfd_open, syms_from_objfile, etc., which might
1718 appear to do what we want. But they have various other
1719 effects which we *don't* want. So we just do stuff
1720 ourselves. We don't worry about mapped files (for one thing,
1721 any mapped file will be out of date). */
1723 /* If we get an error, blow away this objfile (not sure if
1724 that is the correct response for things like shared
1726 old_cleanups
= make_cleanup ((make_cleanup_func
) free_objfile
,
1728 /* We need to do this whenever any symbols go away. */
1729 make_cleanup ((make_cleanup_func
) clear_symtab_users
, 0);
1731 /* Clean up any state BFD has sitting around. We don't need
1732 to close the descriptor but BFD lacks a way of closing the
1733 BFD without closing the descriptor. */
1734 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1735 if (!bfd_close (objfile
->obfd
))
1736 error ("Can't close BFD for %s: %s", objfile
->name
,
1737 bfd_errmsg (bfd_get_error ()));
1738 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1739 if (objfile
->obfd
== NULL
)
1740 error ("Can't open %s to read symbols.", objfile
->name
);
1741 /* bfd_openr sets cacheable to true, which is what we want. */
1742 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1743 error ("Can't read symbols from %s: %s.", objfile
->name
,
1744 bfd_errmsg (bfd_get_error ()));
1746 /* Save the offsets, we will nuke them with the rest of the
1748 num_offsets
= objfile
->num_sections
;
1749 offsets
= (struct section_offsets
*) alloca (SIZEOF_SECTION_OFFSETS
);
1750 memcpy (offsets
, objfile
->section_offsets
, SIZEOF_SECTION_OFFSETS
);
1752 /* Nuke all the state that we will re-read. Much of the following
1753 code which sets things to NULL really is necessary to tell
1754 other parts of GDB that there is nothing currently there. */
1756 /* FIXME: Do we have to free a whole linked list, or is this
1758 if (objfile
->global_psymbols
.list
)
1759 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1760 memset (&objfile
->global_psymbols
, 0,
1761 sizeof (objfile
->global_psymbols
));
1762 if (objfile
->static_psymbols
.list
)
1763 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1764 memset (&objfile
->static_psymbols
, 0,
1765 sizeof (objfile
->static_psymbols
));
1767 /* Free the obstacks for non-reusable objfiles */
1768 free_bcache (&objfile
->psymbol_cache
);
1769 obstack_free (&objfile
->psymbol_obstack
, 0);
1770 obstack_free (&objfile
->symbol_obstack
, 0);
1771 obstack_free (&objfile
->type_obstack
, 0);
1772 objfile
->sections
= NULL
;
1773 objfile
->symtabs
= NULL
;
1774 objfile
->psymtabs
= NULL
;
1775 objfile
->free_psymtabs
= NULL
;
1776 objfile
->msymbols
= NULL
;
1777 objfile
->minimal_symbol_count
= 0;
1778 memset (&objfile
->msymbol_hash
, 0,
1779 sizeof (objfile
->msymbol_hash
));
1780 memset (&objfile
->msymbol_demangled_hash
, 0,
1781 sizeof (objfile
->msymbol_demangled_hash
));
1782 objfile
->fundamental_types
= NULL
;
1783 if (objfile
->sf
!= NULL
)
1785 (*objfile
->sf
->sym_finish
) (objfile
);
1788 /* We never make this a mapped file. */
1790 /* obstack_specify_allocation also initializes the obstack so
1792 obstack_specify_allocation (&objfile
->psymbol_cache
.cache
, 0, 0,
1794 obstack_specify_allocation (&objfile
->psymbol_obstack
, 0, 0,
1796 obstack_specify_allocation (&objfile
->symbol_obstack
, 0, 0,
1798 obstack_specify_allocation (&objfile
->type_obstack
, 0, 0,
1800 if (build_objfile_section_table (objfile
))
1802 error ("Can't find the file sections in `%s': %s",
1803 objfile
->name
, bfd_errmsg (bfd_get_error ()));
1806 /* We use the same section offsets as from last time. I'm not
1807 sure whether that is always correct for shared libraries. */
1808 objfile
->section_offsets
= (struct section_offsets
*)
1809 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
1810 memcpy (objfile
->section_offsets
, offsets
, SIZEOF_SECTION_OFFSETS
);
1811 objfile
->num_sections
= num_offsets
;
1813 /* What the hell is sym_new_init for, anyway? The concept of
1814 distinguishing between the main file and additional files
1815 in this way seems rather dubious. */
1816 if (objfile
== symfile_objfile
)
1818 (*objfile
->sf
->sym_new_init
) (objfile
);
1820 RESET_HP_UX_GLOBALS ();
1824 (*objfile
->sf
->sym_init
) (objfile
);
1825 clear_complaints (1, 1);
1826 /* The "mainline" parameter is a hideous hack; I think leaving it
1827 zero is OK since dbxread.c also does what it needs to do if
1828 objfile->global_psymbols.size is 0. */
1829 (*objfile
->sf
->sym_read
) (objfile
, 0);
1830 if (!have_partial_symbols () && !have_full_symbols ())
1833 printf_filtered ("(no debugging symbols found)\n");
1836 objfile
->flags
|= OBJF_SYMS
;
1838 /* We're done reading the symbol file; finish off complaints. */
1839 clear_complaints (0, 1);
1841 /* Getting new symbols may change our opinion about what is
1844 reinit_frame_cache ();
1846 /* Discard cleanups as symbol reading was successful. */
1847 discard_cleanups (old_cleanups
);
1849 /* If the mtime has changed between the time we set new_modtime
1850 and now, we *want* this to be out of date, so don't call stat
1852 objfile
->mtime
= new_modtime
;
1855 /* Call this after reading in a new symbol table to give target
1856 dependant code a crack at the new symbols. For instance, this
1857 could be used to update the values of target-specific symbols GDB
1858 needs to keep track of (such as _sigtramp, or whatever). */
1860 TARGET_SYMFILE_POSTREAD (objfile
);
1866 clear_symtab_users ();
1878 static filename_language
*filename_language_table
;
1879 static int fl_table_size
, fl_table_next
;
1882 add_filename_language (ext
, lang
)
1886 if (fl_table_next
>= fl_table_size
)
1888 fl_table_size
+= 10;
1889 filename_language_table
= realloc (filename_language_table
,
1893 filename_language_table
[fl_table_next
].ext
= strsave (ext
);
1894 filename_language_table
[fl_table_next
].lang
= lang
;
1898 static char *ext_args
;
1901 set_ext_lang_command (args
, from_tty
)
1906 char *cp
= ext_args
;
1909 /* First arg is filename extension, starting with '.' */
1911 error ("'%s': Filename extension must begin with '.'", ext_args
);
1913 /* Find end of first arg. */
1914 while (*cp
&& !isspace (*cp
))
1918 error ("'%s': two arguments required -- filename extension and language",
1921 /* Null-terminate first arg */
1924 /* Find beginning of second arg, which should be a source language. */
1925 while (*cp
&& isspace (*cp
))
1929 error ("'%s': two arguments required -- filename extension and language",
1932 /* Lookup the language from among those we know. */
1933 lang
= language_enum (cp
);
1935 /* Now lookup the filename extension: do we already know it? */
1936 for (i
= 0; i
< fl_table_next
; i
++)
1937 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
1940 if (i
>= fl_table_next
)
1942 /* new file extension */
1943 add_filename_language (ext_args
, lang
);
1947 /* redefining a previously known filename extension */
1950 /* query ("Really make files of type %s '%s'?", */
1951 /* ext_args, language_str (lang)); */
1953 free (filename_language_table
[i
].ext
);
1954 filename_language_table
[i
].ext
= strsave (ext_args
);
1955 filename_language_table
[i
].lang
= lang
;
1960 info_ext_lang_command (args
, from_tty
)
1966 printf_filtered ("Filename extensions and the languages they represent:");
1967 printf_filtered ("\n\n");
1968 for (i
= 0; i
< fl_table_next
; i
++)
1969 printf_filtered ("\t%s\t- %s\n",
1970 filename_language_table
[i
].ext
,
1971 language_str (filename_language_table
[i
].lang
));
1975 init_filename_language_table ()
1977 if (fl_table_size
== 0) /* protect against repetition */
1981 filename_language_table
=
1982 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
1983 add_filename_language (".c", language_c
);
1984 add_filename_language (".C", language_cplus
);
1985 add_filename_language (".cc", language_cplus
);
1986 add_filename_language (".cp", language_cplus
);
1987 add_filename_language (".cpp", language_cplus
);
1988 add_filename_language (".cxx", language_cplus
);
1989 add_filename_language (".c++", language_cplus
);
1990 add_filename_language (".java", language_java
);
1991 add_filename_language (".class", language_java
);
1992 add_filename_language (".ch", language_chill
);
1993 add_filename_language (".c186", language_chill
);
1994 add_filename_language (".c286", language_chill
);
1995 add_filename_language (".f", language_fortran
);
1996 add_filename_language (".F", language_fortran
);
1997 add_filename_language (".s", language_asm
);
1998 add_filename_language (".S", language_asm
);
2003 deduce_language_from_filename (filename
)
2009 if (filename
!= NULL
)
2010 if ((cp
= strrchr (filename
, '.')) != NULL
)
2011 for (i
= 0; i
< fl_table_next
; i
++)
2012 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2013 return filename_language_table
[i
].lang
;
2015 return language_unknown
;
2020 Allocate and partly initialize a new symbol table. Return a pointer
2021 to it. error() if no space.
2023 Caller must set these fields:
2029 possibly free_named_symtabs (symtab->filename);
2033 allocate_symtab (filename
, objfile
)
2035 struct objfile
*objfile
;
2037 register struct symtab
*symtab
;
2039 symtab
= (struct symtab
*)
2040 obstack_alloc (&objfile
->symbol_obstack
, sizeof (struct symtab
));
2041 memset (symtab
, 0, sizeof (*symtab
));
2042 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2043 &objfile
->symbol_obstack
);
2044 symtab
->fullname
= NULL
;
2045 symtab
->language
= deduce_language_from_filename (filename
);
2046 symtab
->debugformat
= obsavestring ("unknown", 7,
2047 &objfile
->symbol_obstack
);
2049 /* Hook it to the objfile it comes from */
2051 symtab
->objfile
= objfile
;
2052 symtab
->next
= objfile
->symtabs
;
2053 objfile
->symtabs
= symtab
;
2055 /* FIXME: This should go away. It is only defined for the Z8000,
2056 and the Z8000 definition of this macro doesn't have anything to
2057 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2058 here for convenience. */
2059 #ifdef INIT_EXTRA_SYMTAB_INFO
2060 INIT_EXTRA_SYMTAB_INFO (symtab
);
2066 struct partial_symtab
*
2067 allocate_psymtab (filename
, objfile
)
2069 struct objfile
*objfile
;
2071 struct partial_symtab
*psymtab
;
2073 if (objfile
->free_psymtabs
)
2075 psymtab
= objfile
->free_psymtabs
;
2076 objfile
->free_psymtabs
= psymtab
->next
;
2079 psymtab
= (struct partial_symtab
*)
2080 obstack_alloc (&objfile
->psymbol_obstack
,
2081 sizeof (struct partial_symtab
));
2083 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2084 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2085 &objfile
->psymbol_obstack
);
2086 psymtab
->symtab
= NULL
;
2088 /* Prepend it to the psymtab list for the objfile it belongs to.
2089 Psymtabs are searched in most recent inserted -> least recent
2092 psymtab
->objfile
= objfile
;
2093 psymtab
->next
= objfile
->psymtabs
;
2094 objfile
->psymtabs
= psymtab
;
2097 struct partial_symtab
**prev_pst
;
2098 psymtab
->objfile
= objfile
;
2099 psymtab
->next
= NULL
;
2100 prev_pst
= &(objfile
->psymtabs
);
2101 while ((*prev_pst
) != NULL
)
2102 prev_pst
= &((*prev_pst
)->next
);
2103 (*prev_pst
) = psymtab
;
2111 discard_psymtab (pst
)
2112 struct partial_symtab
*pst
;
2114 struct partial_symtab
**prev_pst
;
2117 Empty psymtabs happen as a result of header files which don't
2118 have any symbols in them. There can be a lot of them. But this
2119 check is wrong, in that a psymtab with N_SLINE entries but
2120 nothing else is not empty, but we don't realize that. Fixing
2121 that without slowing things down might be tricky. */
2123 /* First, snip it out of the psymtab chain */
2125 prev_pst
= &(pst
->objfile
->psymtabs
);
2126 while ((*prev_pst
) != pst
)
2127 prev_pst
= &((*prev_pst
)->next
);
2128 (*prev_pst
) = pst
->next
;
2130 /* Next, put it on a free list for recycling */
2132 pst
->next
= pst
->objfile
->free_psymtabs
;
2133 pst
->objfile
->free_psymtabs
= pst
;
2137 /* Reset all data structures in gdb which may contain references to symbol
2141 clear_symtab_users ()
2143 /* Someday, we should do better than this, by only blowing away
2144 the things that really need to be blown. */
2145 clear_value_history ();
2147 clear_internalvars ();
2148 breakpoint_re_set ();
2149 set_default_breakpoint (0, 0, 0, 0);
2150 current_source_symtab
= 0;
2151 current_source_line
= 0;
2152 clear_pc_function_cache ();
2153 if (target_new_objfile_hook
)
2154 target_new_objfile_hook (NULL
);
2157 /* clear_symtab_users_once:
2159 This function is run after symbol reading, or from a cleanup.
2160 If an old symbol table was obsoleted, the old symbol table
2161 has been blown away, but the other GDB data structures that may
2162 reference it have not yet been cleared or re-directed. (The old
2163 symtab was zapped, and the cleanup queued, in free_named_symtab()
2166 This function can be queued N times as a cleanup, or called
2167 directly; it will do all the work the first time, and then will be a
2168 no-op until the next time it is queued. This works by bumping a
2169 counter at queueing time. Much later when the cleanup is run, or at
2170 the end of symbol processing (in case the cleanup is discarded), if
2171 the queued count is greater than the "done-count", we do the work
2172 and set the done-count to the queued count. If the queued count is
2173 less than or equal to the done-count, we just ignore the call. This
2174 is needed because reading a single .o file will often replace many
2175 symtabs (one per .h file, for example), and we don't want to reset
2176 the breakpoints N times in the user's face.
2178 The reason we both queue a cleanup, and call it directly after symbol
2179 reading, is because the cleanup protects us in case of errors, but is
2180 discarded if symbol reading is successful. */
2183 /* FIXME: As free_named_symtabs is currently a big noop this function
2184 is no longer needed. */
2186 clear_symtab_users_once
PARAMS ((void));
2188 static int clear_symtab_users_queued
;
2189 static int clear_symtab_users_done
;
2192 clear_symtab_users_once ()
2194 /* Enforce once-per-`do_cleanups'-semantics */
2195 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2197 clear_symtab_users_done
= clear_symtab_users_queued
;
2199 clear_symtab_users ();
2203 /* Delete the specified psymtab, and any others that reference it. */
2206 cashier_psymtab (pst
)
2207 struct partial_symtab
*pst
;
2209 struct partial_symtab
*ps
, *pprev
= NULL
;
2212 /* Find its previous psymtab in the chain */
2213 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2222 /* Unhook it from the chain. */
2223 if (ps
== pst
->objfile
->psymtabs
)
2224 pst
->objfile
->psymtabs
= ps
->next
;
2226 pprev
->next
= ps
->next
;
2228 /* FIXME, we can't conveniently deallocate the entries in the
2229 partial_symbol lists (global_psymbols/static_psymbols) that
2230 this psymtab points to. These just take up space until all
2231 the psymtabs are reclaimed. Ditto the dependencies list and
2232 filename, which are all in the psymbol_obstack. */
2234 /* We need to cashier any psymtab that has this one as a dependency... */
2236 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2238 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2240 if (ps
->dependencies
[i
] == pst
)
2242 cashier_psymtab (ps
);
2243 goto again
; /* Must restart, chain has been munged. */
2250 /* If a symtab or psymtab for filename NAME is found, free it along
2251 with any dependent breakpoints, displays, etc.
2252 Used when loading new versions of object modules with the "add-file"
2253 command. This is only called on the top-level symtab or psymtab's name;
2254 it is not called for subsidiary files such as .h files.
2256 Return value is 1 if we blew away the environment, 0 if not.
2257 FIXME. The return valu appears to never be used.
2259 FIXME. I think this is not the best way to do this. We should
2260 work on being gentler to the environment while still cleaning up
2261 all stray pointers into the freed symtab. */
2264 free_named_symtabs (name
)
2268 /* FIXME: With the new method of each objfile having it's own
2269 psymtab list, this function needs serious rethinking. In particular,
2270 why was it ever necessary to toss psymtabs with specific compilation
2271 unit filenames, as opposed to all psymtabs from a particular symbol
2273 Well, the answer is that some systems permit reloading of particular
2274 compilation units. We want to blow away any old info about these
2275 compilation units, regardless of which objfiles they arrived in. --gnu. */
2277 register struct symtab
*s
;
2278 register struct symtab
*prev
;
2279 register struct partial_symtab
*ps
;
2280 struct blockvector
*bv
;
2283 /* We only wack things if the symbol-reload switch is set. */
2284 if (!symbol_reloading
)
2287 /* Some symbol formats have trouble providing file names... */
2288 if (name
== 0 || *name
== '\0')
2291 /* Look for a psymtab with the specified name. */
2294 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2296 if (STREQ (name
, ps
->filename
))
2298 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2299 goto again2
; /* Must restart, chain has been munged */
2303 /* Look for a symtab with the specified name. */
2305 for (s
= symtab_list
; s
; s
= s
->next
)
2307 if (STREQ (name
, s
->filename
))
2314 if (s
== symtab_list
)
2315 symtab_list
= s
->next
;
2317 prev
->next
= s
->next
;
2319 /* For now, queue a delete for all breakpoints, displays, etc., whether
2320 or not they depend on the symtab being freed. This should be
2321 changed so that only those data structures affected are deleted. */
2323 /* But don't delete anything if the symtab is empty.
2324 This test is necessary due to a bug in "dbxread.c" that
2325 causes empty symtabs to be created for N_SO symbols that
2326 contain the pathname of the object file. (This problem
2327 has been fixed in GDB 3.9x). */
2329 bv
= BLOCKVECTOR (s
);
2330 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
2331 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
2332 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
2334 complain (&oldsyms_complaint
, name
);
2336 clear_symtab_users_queued
++;
2337 make_cleanup (clear_symtab_users_once
, 0);
2342 complain (&empty_symtab_complaint
, name
);
2349 /* It is still possible that some breakpoints will be affected
2350 even though no symtab was found, since the file might have
2351 been compiled without debugging, and hence not be associated
2352 with a symtab. In order to handle this correctly, we would need
2353 to keep a list of text address ranges for undebuggable files.
2354 For now, we do nothing, since this is a fairly obscure case. */
2358 /* FIXME, what about the minimal symbol table? */
2365 /* Allocate and partially fill a partial symtab. It will be
2366 completely filled at the end of the symbol list.
2368 FILENAME is the name of the symbol-file we are reading from. */
2370 struct partial_symtab
*
2371 start_psymtab_common (objfile
, section_offsets
,
2372 filename
, textlow
, global_syms
, static_syms
)
2373 struct objfile
*objfile
;
2374 struct section_offsets
*section_offsets
;
2377 struct partial_symbol
**global_syms
;
2378 struct partial_symbol
**static_syms
;
2380 struct partial_symtab
*psymtab
;
2382 psymtab
= allocate_psymtab (filename
, objfile
);
2383 psymtab
->section_offsets
= section_offsets
;
2384 psymtab
->textlow
= textlow
;
2385 psymtab
->texthigh
= psymtab
->textlow
; /* default */
2386 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
2387 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
2391 /* Add a symbol with a long value to a psymtab.
2392 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2395 add_psymbol_to_list (name
, namelength
, namespace, class, list
, val
, coreaddr
,
2399 namespace_enum
namespace;
2400 enum address_class
class;
2401 struct psymbol_allocation_list
*list
;
2402 long val
; /* Value as a long */
2403 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2404 enum language language
;
2405 struct objfile
*objfile
;
2407 register struct partial_symbol
*psym
;
2408 char *buf
= alloca (namelength
+ 1);
2409 /* psymbol is static so that there will be no uninitialized gaps in the
2410 structure which might contain random data, causing cache misses in
2412 static struct partial_symbol psymbol
;
2414 /* Create local copy of the partial symbol */
2415 memcpy (buf
, name
, namelength
);
2416 buf
[namelength
] = '\0';
2417 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2418 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2421 SYMBOL_VALUE (&psymbol
) = val
;
2425 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2427 SYMBOL_SECTION (&psymbol
) = 0;
2428 SYMBOL_LANGUAGE (&psymbol
) = language
;
2429 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2430 PSYMBOL_CLASS (&psymbol
) = class;
2431 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2433 /* Stash the partial symbol away in the cache */
2434 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2436 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2437 if (list
->next
>= list
->list
+ list
->size
)
2439 extend_psymbol_list (list
, objfile
);
2441 *list
->next
++ = psym
;
2442 OBJSTAT (objfile
, n_psyms
++);
2445 /* Add a symbol with a long value to a psymtab. This differs from
2446 * add_psymbol_to_list above in taking both a mangled and a demangled
2450 add_psymbol_with_dem_name_to_list (name
, namelength
, dem_name
, dem_namelength
,
2451 namespace, class, list
, val
, coreaddr
, language
, objfile
)
2456 namespace_enum
namespace;
2457 enum address_class
class;
2458 struct psymbol_allocation_list
*list
;
2459 long val
; /* Value as a long */
2460 CORE_ADDR coreaddr
; /* Value as a CORE_ADDR */
2461 enum language language
;
2462 struct objfile
*objfile
;
2464 register struct partial_symbol
*psym
;
2465 char *buf
= alloca (namelength
+ 1);
2466 /* psymbol is static so that there will be no uninitialized gaps in the
2467 structure which might contain random data, causing cache misses in
2469 static struct partial_symbol psymbol
;
2471 /* Create local copy of the partial symbol */
2473 memcpy (buf
, name
, namelength
);
2474 buf
[namelength
] = '\0';
2475 SYMBOL_NAME (&psymbol
) = bcache (buf
, namelength
+ 1, &objfile
->psymbol_cache
);
2477 buf
= alloca (dem_namelength
+ 1);
2478 memcpy (buf
, dem_name
, dem_namelength
);
2479 buf
[dem_namelength
] = '\0';
2484 case language_cplus
:
2485 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol
) =
2486 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2488 case language_chill
:
2489 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol
) =
2490 bcache (buf
, dem_namelength
+ 1, &objfile
->psymbol_cache
);
2492 /* FIXME What should be done for the default case? Ignoring for now. */
2495 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2498 SYMBOL_VALUE (&psymbol
) = val
;
2502 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
2504 SYMBOL_SECTION (&psymbol
) = 0;
2505 SYMBOL_LANGUAGE (&psymbol
) = language
;
2506 PSYMBOL_NAMESPACE (&psymbol
) = namespace;
2507 PSYMBOL_CLASS (&psymbol
) = class;
2508 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol
, language
);
2510 /* Stash the partial symbol away in the cache */
2511 psym
= bcache (&psymbol
, sizeof (struct partial_symbol
), &objfile
->psymbol_cache
);
2513 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2514 if (list
->next
>= list
->list
+ list
->size
)
2516 extend_psymbol_list (list
, objfile
);
2518 *list
->next
++ = psym
;
2519 OBJSTAT (objfile
, n_psyms
++);
2522 /* Initialize storage for partial symbols. */
2525 init_psymbol_list (objfile
, total_symbols
)
2526 struct objfile
*objfile
;
2529 /* Free any previously allocated psymbol lists. */
2531 if (objfile
->global_psymbols
.list
)
2533 mfree (objfile
->md
, (PTR
) objfile
->global_psymbols
.list
);
2535 if (objfile
->static_psymbols
.list
)
2537 mfree (objfile
->md
, (PTR
) objfile
->static_psymbols
.list
);
2540 /* Current best guess is that approximately a twentieth
2541 of the total symbols (in a debugging file) are global or static
2544 objfile
->global_psymbols
.size
= total_symbols
/ 10;
2545 objfile
->static_psymbols
.size
= total_symbols
/ 10;
2547 if (objfile
->global_psymbols
.size
> 0)
2549 objfile
->global_psymbols
.next
=
2550 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
2551 xmmalloc (objfile
->md
, (objfile
->global_psymbols
.size
2552 * sizeof (struct partial_symbol
*)));
2554 if (objfile
->static_psymbols
.size
> 0)
2556 objfile
->static_psymbols
.next
=
2557 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
2558 xmmalloc (objfile
->md
, (objfile
->static_psymbols
.size
2559 * sizeof (struct partial_symbol
*)));
2564 The following code implements an abstraction for debugging overlay sections.
2566 The target model is as follows:
2567 1) The gnu linker will permit multiple sections to be mapped into the
2568 same VMA, each with its own unique LMA (or load address).
2569 2) It is assumed that some runtime mechanism exists for mapping the
2570 sections, one by one, from the load address into the VMA address.
2571 3) This code provides a mechanism for gdb to keep track of which
2572 sections should be considered to be mapped from the VMA to the LMA.
2573 This information is used for symbol lookup, and memory read/write.
2574 For instance, if a section has been mapped then its contents
2575 should be read from the VMA, otherwise from the LMA.
2577 Two levels of debugger support for overlays are available. One is
2578 "manual", in which the debugger relies on the user to tell it which
2579 overlays are currently mapped. This level of support is
2580 implemented entirely in the core debugger, and the information about
2581 whether a section is mapped is kept in the objfile->obj_section table.
2583 The second level of support is "automatic", and is only available if
2584 the target-specific code provides functionality to read the target's
2585 overlay mapping table, and translate its contents for the debugger
2586 (by updating the mapped state information in the obj_section tables).
2588 The interface is as follows:
2590 overlay map <name> -- tell gdb to consider this section mapped
2591 overlay unmap <name> -- tell gdb to consider this section unmapped
2592 overlay list -- list the sections that GDB thinks are mapped
2593 overlay read-target -- get the target's state of what's mapped
2594 overlay off/manual/auto -- set overlay debugging state
2595 Functional interface:
2596 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2597 section, return that section.
2598 find_pc_overlay(pc): find any overlay section that contains
2599 the pc, either in its VMA or its LMA
2600 overlay_is_mapped(sect): true if overlay is marked as mapped
2601 section_is_overlay(sect): true if section's VMA != LMA
2602 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2603 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2604 overlay_mapped_address(...): map an address from section's LMA to VMA
2605 overlay_unmapped_address(...): map an address from section's VMA to LMA
2606 symbol_overlayed_address(...): Return a "current" address for symbol:
2607 either in VMA or LMA depending on whether
2608 the symbol's section is currently mapped
2611 /* Overlay debugging state: */
2613 int overlay_debugging
= 0; /* 0 == off, 1 == manual, -1 == auto */
2614 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
2616 /* Target vector for refreshing overlay mapped state */
2617 static void simple_overlay_update
PARAMS ((struct obj_section
*));
2618 void (*target_overlay_update
) PARAMS ((struct obj_section
*))
2619 = simple_overlay_update
;
2621 /* Function: section_is_overlay (SECTION)
2622 Returns true if SECTION has VMA not equal to LMA, ie.
2623 SECTION is loaded at an address different from where it will "run". */
2626 section_is_overlay (section
)
2629 if (overlay_debugging
)
2630 if (section
&& section
->lma
!= 0 &&
2631 section
->vma
!= section
->lma
)
2637 /* Function: overlay_invalidate_all (void)
2638 Invalidate the mapped state of all overlay sections (mark it as stale). */
2641 overlay_invalidate_all ()
2643 struct objfile
*objfile
;
2644 struct obj_section
*sect
;
2646 ALL_OBJSECTIONS (objfile
, sect
)
2647 if (section_is_overlay (sect
->the_bfd_section
))
2648 sect
->ovly_mapped
= -1;
2651 /* Function: overlay_is_mapped (SECTION)
2652 Returns true if section is an overlay, and is currently mapped.
2653 Private: public access is thru function section_is_mapped.
2655 Access to the ovly_mapped flag is restricted to this function, so
2656 that we can do automatic update. If the global flag
2657 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2658 overlay_invalidate_all. If the mapped state of the particular
2659 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2662 overlay_is_mapped (osect
)
2663 struct obj_section
*osect
;
2665 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
2668 switch (overlay_debugging
)
2672 return 0; /* overlay debugging off */
2673 case -1: /* overlay debugging automatic */
2674 /* Unles there is a target_overlay_update function,
2675 there's really nothing useful to do here (can't really go auto) */
2676 if (target_overlay_update
)
2678 if (overlay_cache_invalid
)
2680 overlay_invalidate_all ();
2681 overlay_cache_invalid
= 0;
2683 if (osect
->ovly_mapped
== -1)
2684 (*target_overlay_update
) (osect
);
2686 /* fall thru to manual case */
2687 case 1: /* overlay debugging manual */
2688 return osect
->ovly_mapped
== 1;
2692 /* Function: section_is_mapped
2693 Returns true if section is an overlay, and is currently mapped. */
2696 section_is_mapped (section
)
2699 struct objfile
*objfile
;
2700 struct obj_section
*osect
;
2702 if (overlay_debugging
)
2703 if (section
&& section_is_overlay (section
))
2704 ALL_OBJSECTIONS (objfile
, osect
)
2705 if (osect
->the_bfd_section
== section
)
2706 return overlay_is_mapped (osect
);
2711 /* Function: pc_in_unmapped_range
2712 If PC falls into the lma range of SECTION, return true, else false. */
2715 pc_in_unmapped_range (pc
, section
)
2721 if (overlay_debugging
)
2722 if (section
&& section_is_overlay (section
))
2724 size
= bfd_get_section_size_before_reloc (section
);
2725 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
2731 /* Function: pc_in_mapped_range
2732 If PC falls into the vma range of SECTION, return true, else false. */
2735 pc_in_mapped_range (pc
, section
)
2741 if (overlay_debugging
)
2742 if (section
&& section_is_overlay (section
))
2744 size
= bfd_get_section_size_before_reloc (section
);
2745 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
2751 /* Function: overlay_unmapped_address (PC, SECTION)
2752 Returns the address corresponding to PC in the unmapped (load) range.
2753 May be the same as PC. */
2756 overlay_unmapped_address (pc
, section
)
2760 if (overlay_debugging
)
2761 if (section
&& section_is_overlay (section
) &&
2762 pc_in_mapped_range (pc
, section
))
2763 return pc
+ section
->lma
- section
->vma
;
2768 /* Function: overlay_mapped_address (PC, SECTION)
2769 Returns the address corresponding to PC in the mapped (runtime) range.
2770 May be the same as PC. */
2773 overlay_mapped_address (pc
, section
)
2777 if (overlay_debugging
)
2778 if (section
&& section_is_overlay (section
) &&
2779 pc_in_unmapped_range (pc
, section
))
2780 return pc
+ section
->vma
- section
->lma
;
2786 /* Function: symbol_overlayed_address
2787 Return one of two addresses (relative to the VMA or to the LMA),
2788 depending on whether the section is mapped or not. */
2791 symbol_overlayed_address (address
, section
)
2795 if (overlay_debugging
)
2797 /* If the symbol has no section, just return its regular address. */
2800 /* If the symbol's section is not an overlay, just return its address */
2801 if (!section_is_overlay (section
))
2803 /* If the symbol's section is mapped, just return its address */
2804 if (section_is_mapped (section
))
2807 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2808 * then return its LOADED address rather than its vma address!!
2810 return overlay_unmapped_address (address
, section
);
2815 /* Function: find_pc_overlay (PC)
2816 Return the best-match overlay section for PC:
2817 If PC matches a mapped overlay section's VMA, return that section.
2818 Else if PC matches an unmapped section's VMA, return that section.
2819 Else if PC matches an unmapped section's LMA, return that section. */
2822 find_pc_overlay (pc
)
2825 struct objfile
*objfile
;
2826 struct obj_section
*osect
, *best_match
= NULL
;
2828 if (overlay_debugging
)
2829 ALL_OBJSECTIONS (objfile
, osect
)
2830 if (section_is_overlay (osect
->the_bfd_section
))
2832 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
2834 if (overlay_is_mapped (osect
))
2835 return osect
->the_bfd_section
;
2839 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
2842 return best_match
? best_match
->the_bfd_section
: NULL
;
2845 /* Function: find_pc_mapped_section (PC)
2846 If PC falls into the VMA address range of an overlay section that is
2847 currently marked as MAPPED, return that section. Else return NULL. */
2850 find_pc_mapped_section (pc
)
2853 struct objfile
*objfile
;
2854 struct obj_section
*osect
;
2856 if (overlay_debugging
)
2857 ALL_OBJSECTIONS (objfile
, osect
)
2858 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
2859 overlay_is_mapped (osect
))
2860 return osect
->the_bfd_section
;
2865 /* Function: list_overlays_command
2866 Print a list of mapped sections and their PC ranges */
2869 list_overlays_command (args
, from_tty
)
2874 struct objfile
*objfile
;
2875 struct obj_section
*osect
;
2877 if (overlay_debugging
)
2878 ALL_OBJSECTIONS (objfile
, osect
)
2879 if (overlay_is_mapped (osect
))
2885 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
2886 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
2887 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
2888 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
2890 printf_filtered ("Section %s, loaded at ", name
);
2891 print_address_numeric (lma
, 1, gdb_stdout
);
2892 puts_filtered (" - ");
2893 print_address_numeric (lma
+ size
, 1, gdb_stdout
);
2894 printf_filtered (", mapped at ");
2895 print_address_numeric (vma
, 1, gdb_stdout
);
2896 puts_filtered (" - ");
2897 print_address_numeric (vma
+ size
, 1, gdb_stdout
);
2898 puts_filtered ("\n");
2903 printf_filtered ("No sections are mapped.\n");
2906 /* Function: map_overlay_command
2907 Mark the named section as mapped (ie. residing at its VMA address). */
2910 map_overlay_command (args
, from_tty
)
2914 struct objfile
*objfile
, *objfile2
;
2915 struct obj_section
*sec
, *sec2
;
2918 if (!overlay_debugging
)
2919 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2921 if (args
== 0 || *args
== 0)
2922 error ("Argument required: name of an overlay section");
2924 /* First, find a section matching the user supplied argument */
2925 ALL_OBJSECTIONS (objfile
, sec
)
2926 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2928 /* Now, check to see if the section is an overlay. */
2929 bfdsec
= sec
->the_bfd_section
;
2930 if (!section_is_overlay (bfdsec
))
2931 continue; /* not an overlay section */
2933 /* Mark the overlay as "mapped" */
2934 sec
->ovly_mapped
= 1;
2936 /* Next, make a pass and unmap any sections that are
2937 overlapped by this new section: */
2938 ALL_OBJSECTIONS (objfile2
, sec2
)
2939 if (sec2
->ovly_mapped
&&
2941 sec
->the_bfd_section
!= sec2
->the_bfd_section
&&
2942 (pc_in_mapped_range (sec2
->addr
, sec
->the_bfd_section
) ||
2943 pc_in_mapped_range (sec2
->endaddr
, sec
->the_bfd_section
)))
2946 printf_filtered ("Note: section %s unmapped by overlap\n",
2947 bfd_section_name (objfile
->obfd
,
2948 sec2
->the_bfd_section
));
2949 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
2953 error ("No overlay section called %s", args
);
2956 /* Function: unmap_overlay_command
2957 Mark the overlay section as unmapped
2958 (ie. resident in its LMA address range, rather than the VMA range). */
2961 unmap_overlay_command (args
, from_tty
)
2965 struct objfile
*objfile
;
2966 struct obj_section
*sec
;
2968 if (!overlay_debugging
)
2969 error ("Overlay debugging not enabled. Use the 'OVERLAY ON' command.");
2971 if (args
== 0 || *args
== 0)
2972 error ("Argument required: name of an overlay section");
2974 /* First, find a section matching the user supplied argument */
2975 ALL_OBJSECTIONS (objfile
, sec
)
2976 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
2978 if (!sec
->ovly_mapped
)
2979 error ("Section %s is not mapped", args
);
2980 sec
->ovly_mapped
= 0;
2983 error ("No overlay section called %s", args
);
2986 /* Function: overlay_auto_command
2987 A utility command to turn on overlay debugging.
2988 Possibly this should be done via a set/show command. */
2991 overlay_auto_command (args
, from_tty
)
2995 overlay_debugging
= -1;
2997 printf_filtered ("Automatic overlay debugging enabled.");
3000 /* Function: overlay_manual_command
3001 A utility command to turn on overlay debugging.
3002 Possibly this should be done via a set/show command. */
3005 overlay_manual_command (args
, from_tty
)
3009 overlay_debugging
= 1;
3011 printf_filtered ("Overlay debugging enabled.");
3014 /* Function: overlay_off_command
3015 A utility command to turn on overlay debugging.
3016 Possibly this should be done via a set/show command. */
3019 overlay_off_command (args
, from_tty
)
3023 overlay_debugging
= 0;
3025 printf_filtered ("Overlay debugging disabled.");
3029 overlay_load_command (args
, from_tty
)
3033 if (target_overlay_update
)
3034 (*target_overlay_update
) (NULL
);
3036 error ("This target does not know how to read its overlay state.");
3039 /* Function: overlay_command
3040 A place-holder for a mis-typed command */
3042 /* Command list chain containing all defined "overlay" subcommands. */
3043 struct cmd_list_element
*overlaylist
;
3046 overlay_command (args
, from_tty
)
3051 ("\"overlay\" must be followed by the name of an overlay command.\n");
3052 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3056 /* Target Overlays for the "Simplest" overlay manager:
3058 This is GDB's default target overlay layer. It works with the
3059 minimal overlay manager supplied as an example by Cygnus. The
3060 entry point is via a function pointer "target_overlay_update",
3061 so targets that use a different runtime overlay manager can
3062 substitute their own overlay_update function and take over the
3065 The overlay_update function pokes around in the target's data structures
3066 to see what overlays are mapped, and updates GDB's overlay mapping with
3069 In this simple implementation, the target data structures are as follows:
3070 unsigned _novlys; /# number of overlay sections #/
3071 unsigned _ovly_table[_novlys][4] = {
3072 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3073 {..., ..., ..., ...},
3075 unsigned _novly_regions; /# number of overlay regions #/
3076 unsigned _ovly_region_table[_novly_regions][3] = {
3077 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3080 These functions will attempt to update GDB's mappedness state in the
3081 symbol section table, based on the target's mappedness state.
3083 To do this, we keep a cached copy of the target's _ovly_table, and
3084 attempt to detect when the cached copy is invalidated. The main
3085 entry point is "simple_overlay_update(SECT), which looks up SECT in
3086 the cached table and re-reads only the entry for that section from
3087 the target (whenever possible).
3090 /* Cached, dynamically allocated copies of the target data structures: */
3091 static unsigned (*cache_ovly_table
)[4] = 0;
3093 static unsigned (*cache_ovly_region_table
)[3] = 0;
3095 static unsigned cache_novlys
= 0;
3097 static unsigned cache_novly_regions
= 0;
3099 static CORE_ADDR cache_ovly_table_base
= 0;
3101 static CORE_ADDR cache_ovly_region_table_base
= 0;
3105 VMA
, SIZE
, LMA
, MAPPED
3107 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3109 /* Throw away the cached copy of _ovly_table */
3111 simple_free_overlay_table ()
3113 if (cache_ovly_table
)
3114 free (cache_ovly_table
);
3116 cache_ovly_table
= NULL
;
3117 cache_ovly_table_base
= 0;
3121 /* Throw away the cached copy of _ovly_region_table */
3123 simple_free_overlay_region_table ()
3125 if (cache_ovly_region_table
)
3126 free (cache_ovly_region_table
);
3127 cache_novly_regions
= 0;
3128 cache_ovly_region_table
= NULL
;
3129 cache_ovly_region_table_base
= 0;
3133 /* Read an array of ints from the target into a local buffer.
3134 Convert to host order. int LEN is number of ints */
3136 read_target_long_array (memaddr
, myaddr
, len
)
3138 unsigned int *myaddr
;
3141 char *buf
= alloca (len
* TARGET_LONG_BYTES
);
3144 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3145 for (i
= 0; i
< len
; i
++)
3146 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3150 /* Find and grab a copy of the target _ovly_table
3151 (and _novlys, which is needed for the table's size) */
3153 simple_read_overlay_table ()
3155 struct minimal_symbol
*msym
;
3157 simple_free_overlay_table ();
3158 msym
= lookup_minimal_symbol ("_novlys", 0, 0);
3160 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3162 return 0; /* failure */
3163 cache_ovly_table
= (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3164 if (cache_ovly_table
!= NULL
)
3166 msym
= lookup_minimal_symbol ("_ovly_table", 0, 0);
3169 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3170 read_target_long_array (cache_ovly_table_base
,
3171 (int *) cache_ovly_table
,
3175 return 0; /* failure */
3178 return 0; /* failure */
3179 return 1; /* SUCCESS */
3183 /* Find and grab a copy of the target _ovly_region_table
3184 (and _novly_regions, which is needed for the table's size) */
3186 simple_read_overlay_region_table ()
3188 struct minimal_symbol
*msym
;
3190 simple_free_overlay_region_table ();
3191 msym
= lookup_minimal_symbol ("_novly_regions", 0, 0);
3193 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3195 return 0; /* failure */
3196 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3197 if (cache_ovly_region_table
!= NULL
)
3199 msym
= lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3202 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3203 read_target_long_array (cache_ovly_region_table_base
,
3204 (int *) cache_ovly_region_table
,
3205 cache_novly_regions
* 3);
3208 return 0; /* failure */
3211 return 0; /* failure */
3212 return 1; /* SUCCESS */
3216 /* Function: simple_overlay_update_1
3217 A helper function for simple_overlay_update. Assuming a cached copy
3218 of _ovly_table exists, look through it to find an entry whose vma,
3219 lma and size match those of OSECT. Re-read the entry and make sure
3220 it still matches OSECT (else the table may no longer be valid).
3221 Set OSECT's mapped state to match the entry. Return: 1 for
3222 success, 0 for failure. */
3225 simple_overlay_update_1 (osect
)
3226 struct obj_section
*osect
;
3230 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3231 for (i
= 0; i
< cache_novlys
; i
++)
3232 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3233 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3234 cache_ovly_table[i][SIZE] == size */ )
3236 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3237 (int *) cache_ovly_table
[i
], 4);
3238 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3239 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3240 cache_ovly_table[i][SIZE] == size */ )
3242 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3245 else /* Warning! Warning! Target's ovly table has changed! */
3251 /* Function: simple_overlay_update
3252 If OSECT is NULL, then update all sections' mapped state
3253 (after re-reading the entire target _ovly_table).
3254 If OSECT is non-NULL, then try to find a matching entry in the
3255 cached ovly_table and update only OSECT's mapped state.
3256 If a cached entry can't be found or the cache isn't valid, then
3257 re-read the entire cache, and go ahead and update all sections. */
3260 simple_overlay_update (osect
)
3261 struct obj_section
*osect
;
3263 struct objfile
*objfile
;
3265 /* Were we given an osect to look up? NULL means do all of them. */
3267 /* Have we got a cached copy of the target's overlay table? */
3268 if (cache_ovly_table
!= NULL
)
3269 /* Does its cached location match what's currently in the symtab? */
3270 if (cache_ovly_table_base
==
3271 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3272 /* Then go ahead and try to look up this single section in the cache */
3273 if (simple_overlay_update_1 (osect
))
3274 /* Found it! We're done. */
3277 /* Cached table no good: need to read the entire table anew.
3278 Or else we want all the sections, in which case it's actually
3279 more efficient to read the whole table in one block anyway. */
3281 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3283 warning ("Failed to read the target overlay mapping table.");
3286 /* Now may as well update all sections, even if only one was requested. */
3287 ALL_OBJSECTIONS (objfile
, osect
)
3288 if (section_is_overlay (osect
->the_bfd_section
))
3292 size
= bfd_get_section_size_before_reloc (osect
->the_bfd_section
);
3293 for (i
= 0; i
< cache_novlys
; i
++)
3294 if (cache_ovly_table
[i
][VMA
] == osect
->the_bfd_section
->vma
&&
3295 cache_ovly_table
[i
][LMA
] == osect
->the_bfd_section
->lma
/* &&
3296 cache_ovly_table[i][SIZE] == size */ )
3297 { /* obj_section matches i'th entry in ovly_table */
3298 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3299 break; /* finished with inner for loop: break out */
3306 _initialize_symfile ()
3308 struct cmd_list_element
*c
;
3310 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
3311 "Load symbol table from executable file FILE.\n\
3312 The `file' command can also load symbol tables, as well as setting the file\n\
3313 to execute.", &cmdlist
);
3314 c
->completer
= filename_completer
;
3316 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
3317 "Usage: add-symbol-file FILE ADDR [DATA_ADDR [BSS_ADDR]]\n\
3318 or: add-symbol-file FILE -T<SECT> <SECT_ADDR> -T<SECT> <SECT_ADDR> ...\n\
3319 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3320 ADDR is the starting address of the file's text.\n\
3321 The optional arguments, DATA_ADDR and BSS_ADDR, should be specified\n\
3322 if the data and bss segments are not contiguous with the text.\n\
3323 For complicated cases, SECT is a section name to be loaded at SECT_ADDR.",
3325 c
->completer
= filename_completer
;
3327 c
= add_cmd ("add-shared-symbol-files", class_files
,
3328 add_shared_symbol_files_command
,
3329 "Load the symbols from shared objects in the dynamic linker's link map.",
3331 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
3334 c
= add_cmd ("load", class_files
, load_command
,
3335 "Dynamically load FILE into the running program, and record its symbols\n\
3336 for access from GDB.", &cmdlist
);
3337 c
->completer
= filename_completer
;
3340 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
3341 (char *) &symbol_reloading
,
3342 "Set dynamic symbol table reloading multiple times in one run.",
3346 add_prefix_cmd ("overlay", class_support
, overlay_command
,
3347 "Commands for debugging overlays.", &overlaylist
,
3348 "overlay ", 0, &cmdlist
);
3350 add_com_alias ("ovly", "overlay", class_alias
, 1);
3351 add_com_alias ("ov", "overlay", class_alias
, 1);
3353 add_cmd ("map-overlay", class_support
, map_overlay_command
,
3354 "Assert that an overlay section is mapped.", &overlaylist
);
3356 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
3357 "Assert that an overlay section is unmapped.", &overlaylist
);
3359 add_cmd ("list-overlays", class_support
, list_overlays_command
,
3360 "List mappings of overlay sections.", &overlaylist
);
3362 add_cmd ("manual", class_support
, overlay_manual_command
,
3363 "Enable overlay debugging.", &overlaylist
);
3364 add_cmd ("off", class_support
, overlay_off_command
,
3365 "Disable overlay debugging.", &overlaylist
);
3366 add_cmd ("auto", class_support
, overlay_auto_command
,
3367 "Enable automatic overlay debugging.", &overlaylist
);
3368 add_cmd ("load-target", class_support
, overlay_load_command
,
3369 "Read the overlay mapping state from the target.", &overlaylist
);
3371 /* Filename extension to source language lookup table: */
3372 init_filename_language_table ();
3373 c
= add_set_cmd ("extension-language", class_files
, var_string_noescape
,
3375 "Set mapping between filename extension and source language.\n\
3376 Usage: set extension-language .foo bar",
3378 c
->function
.cfunc
= set_ext_lang_command
;
3380 add_info ("extensions", info_ext_lang_command
,
3381 "All filename extensions associated with a source language.");
3384 (add_set_cmd ("download-write-size", class_obscure
,
3385 var_integer
, (char *) &download_write_size
,
3386 "Set the write size used when downloading a program.\n"
3387 "Only used when downloading a program onto a remote\n"
3388 "target. Specify zero, or a negative value, to disable\n"
3389 "blocked writes. The actual size of each transfer is also\n"
3390 "limited by the size of the target packet and the memory\n"