1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995 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, Boston, MA 02111-1307, USA. */
31 #include "breakpoint.h"
33 #include "complaints.h"
35 #include "inferior.h" /* for write_pc */
40 #include <sys/types.h>
42 #include "gdb_string.h"
53 /* Global variables owned by this file */
54 int readnow_symbol_files
; /* Read full symbols immediately */
56 struct complaint oldsyms_complaint
= {
57 "Replacing old symbols for `%s'", 0, 0
60 struct complaint empty_symtab_complaint
= {
61 "Empty symbol table found for `%s'", 0, 0
64 /* External variables and functions referenced. */
66 extern int info_verbose
;
68 /* Functions this file defines */
71 set_initial_language
PARAMS ((void));
74 load_command
PARAMS ((char *, int));
77 add_symbol_file_command
PARAMS ((char *, int));
80 add_shared_symbol_files_command
PARAMS ((char *, int));
83 cashier_psymtab
PARAMS ((struct partial_symtab
*));
86 compare_psymbols
PARAMS ((const void *, const void *));
89 compare_symbols
PARAMS ((const void *, const void *));
92 symfile_bfd_open
PARAMS ((char *));
95 find_sym_fns
PARAMS ((struct objfile
*));
97 /* List of all available sym_fns. On gdb startup, each object file reader
98 calls add_symtab_fns() to register information on each format it is
101 static struct sym_fns
*symtab_fns
= NULL
;
103 /* Flag for whether user will be reloading symbols multiple times.
104 Defaults to ON for VxWorks, otherwise OFF. */
106 #ifdef SYMBOL_RELOADING_DEFAULT
107 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
109 int symbol_reloading
= 0;
112 /* If true, then shared library symbols will be added automatically
113 when the inferior is created. This is almost always what users
114 will want to have happen; but for very large programs, the startup
115 time will be excessive, and so if this is a problem, the user can
116 clear this flag and then add the shared library symbols as needed.
117 Note that there is a potential for confusion, since if the shared
118 library symbols are not loaded, commands like "info fun" will *not*
119 report all the functions that are actually present. */
121 int auto_solib_add_at_startup
= 1;
124 /* Since this function is called from within qsort, in an ANSI environment
125 it must conform to the prototype for qsort, which specifies that the
126 comparison function takes two "void *" pointers. */
129 compare_symbols (s1p
, s2p
)
133 register struct symbol
**s1
, **s2
;
135 s1
= (struct symbol
**) s1p
;
136 s2
= (struct symbol
**) s2p
;
138 return (STRCMP (SYMBOL_NAME (*s1
), SYMBOL_NAME (*s2
)));
145 compare_psymbols -- compare two partial symbols by name
149 Given pointer to two partial symbol table entries, compare
150 them by name and return -N, 0, or +N (ala strcmp). Typically
151 used by sorting routines like qsort().
155 Does direct compare of first two characters before punting
156 and passing to strcmp for longer compares. Note that the
157 original version had a bug whereby two null strings or two
158 identically named one character strings would return the
159 comparison of memory following the null byte.
164 compare_psymbols (s1p
, s2p
)
168 register char *st1
= SYMBOL_NAME ((struct partial_symbol
*) s1p
);
169 register char *st2
= SYMBOL_NAME ((struct partial_symbol
*) s2p
);
171 if ((st1
[0] - st2
[0]) || !st1
[0])
173 return (st1
[0] - st2
[0]);
175 else if ((st1
[1] - st2
[1]) || !st1
[1])
177 return (st1
[1] - st2
[1]);
181 return (STRCMP (st1
+ 2, st2
+ 2));
186 sort_pst_symbols (pst
)
187 struct partial_symtab
*pst
;
189 /* Sort the global list; don't sort the static list */
191 qsort (pst
-> objfile
-> global_psymbols
.list
+ pst
-> globals_offset
,
192 pst
-> n_global_syms
, sizeof (struct partial_symbol
),
196 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
200 register struct block
*b
;
202 qsort (&BLOCK_SYM (b
, 0), BLOCK_NSYMS (b
),
203 sizeof (struct symbol
*), compare_symbols
);
206 /* Call sort_symtab_syms to sort alphabetically
207 the symbols of each block of one symtab. */
211 register struct symtab
*s
;
213 register struct blockvector
*bv
;
216 register struct block
*b
;
220 bv
= BLOCKVECTOR (s
);
221 nbl
= BLOCKVECTOR_NBLOCKS (bv
);
222 for (i
= 0; i
< nbl
; i
++)
224 b
= BLOCKVECTOR_BLOCK (bv
, i
);
225 if (BLOCK_SHOULD_SORT (b
))
230 /* Make a copy of the string at PTR with SIZE characters in the symbol obstack
231 (and add a null character at the end in the copy).
232 Returns the address of the copy. */
235 obsavestring (ptr
, size
, obstackp
)
238 struct obstack
*obstackp
;
240 register char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
241 /* Open-coded memcpy--saves function call time.
242 These strings are usually short. */
244 register char *p1
= ptr
;
245 register char *p2
= p
;
246 char *end
= ptr
+ size
;
254 /* Concatenate strings S1, S2 and S3; return the new string.
255 Space is found in the symbol_obstack. */
258 obconcat (obstackp
, s1
, s2
, s3
)
259 struct obstack
*obstackp
;
260 const char *s1
, *s2
, *s3
;
262 register int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
263 register char *val
= (char *) obstack_alloc (obstackp
, len
);
270 /* Get the symbol table that corresponds to a partial_symtab.
271 This is fast after the first time you do it. In fact, there
272 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
276 psymtab_to_symtab (pst
)
277 register struct partial_symtab
*pst
;
279 /* If it's been looked up before, return it. */
283 /* If it has not yet been read in, read it. */
286 (*pst
->read_symtab
) (pst
);
292 /* Initialize entry point information for this objfile. */
295 init_entry_point_info (objfile
)
296 struct objfile
*objfile
;
298 /* Save startup file's range of PC addresses to help blockframe.c
299 decide where the bottom of the stack is. */
301 if (bfd_get_file_flags (objfile
-> obfd
) & EXEC_P
)
303 /* Executable file -- record its entry point so we'll recognize
304 the startup file because it contains the entry point. */
305 objfile
-> ei
.entry_point
= bfd_get_start_address (objfile
-> obfd
);
309 /* Examination of non-executable.o files. Short-circuit this stuff. */
310 objfile
-> ei
.entry_point
= INVALID_ENTRY_POINT
;
312 objfile
-> ei
.entry_file_lowpc
= INVALID_ENTRY_LOWPC
;
313 objfile
-> ei
.entry_file_highpc
= INVALID_ENTRY_HIGHPC
;
314 objfile
-> ei
.entry_func_lowpc
= INVALID_ENTRY_LOWPC
;
315 objfile
-> ei
.entry_func_highpc
= INVALID_ENTRY_HIGHPC
;
316 objfile
-> ei
.main_func_lowpc
= INVALID_ENTRY_LOWPC
;
317 objfile
-> ei
.main_func_highpc
= INVALID_ENTRY_HIGHPC
;
320 /* Get current entry point address. */
323 entry_point_address()
325 return symfile_objfile
? symfile_objfile
->ei
.entry_point
: 0;
328 /* Remember the lowest-addressed loadable section we've seen.
329 This function is called via bfd_map_over_sections.
331 In case of equal vmas, the section with the largest size becomes the
332 lowest-addressed loadable section.
334 If the vmas and sizes are equal, the last section is considered the
335 lowest-addressed loadable section. */
338 find_lowest_section (abfd
, sect
, obj
)
343 asection
**lowest
= (asection
**)obj
;
345 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
348 *lowest
= sect
; /* First loadable section */
349 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
350 *lowest
= sect
; /* A lower loadable section */
351 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
352 && (bfd_section_size (abfd
, (*lowest
))
353 <= bfd_section_size (abfd
, sect
)))
357 /* Process a symbol file, as either the main file or as a dynamically
360 NAME is the file name (which will be tilde-expanded and made
361 absolute herein) (but we don't free or modify NAME itself).
362 FROM_TTY says how verbose to be. MAINLINE specifies whether this
363 is the main symbol file, or whether it's an extra symbol file such
364 as dynamically loaded code. If !mainline, ADDR is the address
365 where the text segment was loaded. If VERBO, the caller has printed
366 a verbose message about the symbol reading (and complaints can be
367 more terse about it). */
370 syms_from_objfile (objfile
, addr
, mainline
, verbo
)
371 struct objfile
*objfile
;
376 struct section_offsets
*section_offsets
;
377 asection
*lowest_sect
;
378 struct cleanup
*old_chain
;
380 init_entry_point_info (objfile
);
381 find_sym_fns (objfile
);
383 /* Make sure that partially constructed symbol tables will be cleaned up
384 if an error occurs during symbol reading. */
385 old_chain
= make_cleanup (free_objfile
, objfile
);
389 /* We will modify the main symbol table, make sure that all its users
390 will be cleaned up if an error occurs during symbol reading. */
391 make_cleanup (clear_symtab_users
, 0);
393 /* Since no error yet, throw away the old symbol table. */
395 if (symfile_objfile
!= NULL
)
397 free_objfile (symfile_objfile
);
398 symfile_objfile
= NULL
;
401 /* Currently we keep symbols from the add-symbol-file command.
402 If the user wants to get rid of them, they should do "symbol-file"
403 without arguments first. Not sure this is the best behavior
406 (*objfile
-> sf
-> sym_new_init
) (objfile
);
409 /* Convert addr into an offset rather than an absolute address.
410 We find the lowest address of a loaded segment in the objfile,
411 and assume that <addr> is where that got loaded. Due to historical
412 precedent, we warn if that doesn't happen to be a text segment. */
416 addr
= 0; /* No offset from objfile addresses. */
420 lowest_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
421 if (lowest_sect
== NULL
)
422 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
425 if (lowest_sect
== NULL
)
426 warning ("no loadable sections found in added symbol-file %s",
428 else if ((bfd_get_section_flags (objfile
->obfd
, lowest_sect
) & SEC_CODE
)
430 /* FIXME-32x64--assumes bfd_vma fits in long. */
431 warning ("Lowest section in %s is %s at 0x%lx",
433 bfd_section_name (objfile
->obfd
, lowest_sect
),
434 (unsigned long) bfd_section_vma (objfile
->obfd
, lowest_sect
));
437 addr
-= bfd_section_vma (objfile
->obfd
, lowest_sect
);
440 /* Initialize symbol reading routines for this objfile, allow complaints to
441 appear for this new file, and record how verbose to be, then do the
442 initial symbol reading for this file. */
444 (*objfile
-> sf
-> sym_init
) (objfile
);
445 clear_complaints (1, verbo
);
447 section_offsets
= (*objfile
-> sf
-> sym_offsets
) (objfile
, addr
);
448 objfile
->section_offsets
= section_offsets
;
450 #ifndef IBM6000_TARGET
451 /* This is a SVR4/SunOS specific hack, I think. In any event, it
452 screws RS/6000. sym_offsets should be doing this sort of thing,
453 because it knows the mapping between bfd sections and
455 /* This is a hack. As far as I can tell, section offsets are not
456 target dependent. They are all set to addr with a couple of
457 exceptions. The exceptions are sysvr4 shared libraries, whose
458 offsets are kept in solib structures anyway and rs6000 xcoff
459 which handles shared libraries in a completely unique way.
461 Section offsets are built similarly, except that they are built
462 by adding addr in all cases because there is no clear mapping
463 from section_offsets into actual sections. Note that solib.c
464 has a different algorythm for finding section offsets.
466 These should probably all be collapsed into some target
467 independent form of shared library support. FIXME. */
471 struct obj_section
*s
;
473 for (s
= objfile
->sections
; s
< objfile
->sections_end
; ++s
)
475 s
->addr
-= s
->offset
;
477 s
->endaddr
-= s
->offset
;
482 #endif /* not IBM6000_TARGET */
484 (*objfile
-> sf
-> sym_read
) (objfile
, section_offsets
, mainline
);
486 if (!have_partial_symbols () && !have_full_symbols ())
489 printf_filtered ("(no debugging symbols found)...");
493 /* Don't allow char * to have a typename (else would get caddr_t).
494 Ditto void *. FIXME: Check whether this is now done by all the
495 symbol readers themselves (many of them now do), and if so remove
498 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
499 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
501 /* Mark the objfile has having had initial symbol read attempted. Note
502 that this does not mean we found any symbols... */
504 objfile
-> flags
|= OBJF_SYMS
;
506 /* Discard cleanups as symbol reading was successful. */
508 discard_cleanups (old_chain
);
510 /* Call this after reading in a new symbol table to give target dependant code
511 a crack at the new symbols. For instance, this could be used to update the
512 values of target-specific symbols GDB needs to keep track of (such as
513 _sigtramp, or whatever). */
515 TARGET_SYMFILE_POSTREAD (objfile
);
518 /* Perform required actions after either reading in the initial
519 symbols for a new objfile, or mapping in the symbols from a reusable
523 new_symfile_objfile (objfile
, mainline
, verbo
)
524 struct objfile
*objfile
;
529 /* If this is the main symbol file we have to clean up all users of the
530 old main symbol file. Otherwise it is sufficient to fixup all the
531 breakpoints that may have been redefined by this symbol file. */
534 /* OK, make it the "real" symbol file. */
535 symfile_objfile
= objfile
;
537 clear_symtab_users ();
541 breakpoint_re_set ();
544 /* We're done reading the symbol file; finish off complaints. */
545 clear_complaints (0, verbo
);
548 /* Process a symbol file, as either the main file or as a dynamically
551 NAME is the file name (which will be tilde-expanded and made
552 absolute herein) (but we don't free or modify NAME itself).
553 FROM_TTY says how verbose to be. MAINLINE specifies whether this
554 is the main symbol file, or whether it's an extra symbol file such
555 as dynamically loaded code. If !mainline, ADDR is the address
556 where the text segment was loaded.
558 Upon success, returns a pointer to the objfile that was added.
559 Upon failure, jumps back to command level (never returns). */
562 symbol_file_add (name
, from_tty
, addr
, mainline
, mapped
, readnow
)
570 struct objfile
*objfile
;
571 struct partial_symtab
*psymtab
;
574 /* Open a bfd for the file, and give user a chance to burp if we'd be
575 interactively wiping out any existing symbols. */
577 abfd
= symfile_bfd_open (name
);
579 if ((have_full_symbols () || have_partial_symbols ())
582 && !query ("Load new symbol table from \"%s\"? ", name
))
583 error ("Not confirmed.");
585 objfile
= allocate_objfile (abfd
, mapped
);
587 /* If the objfile uses a mapped symbol file, and we have a psymtab for
588 it, then skip reading any symbols at this time. */
590 if ((objfile
-> flags
& OBJF_MAPPED
) && (objfile
-> flags
& OBJF_SYMS
))
592 /* We mapped in an existing symbol table file that already has had
593 initial symbol reading performed, so we can skip that part. Notify
594 the user that instead of reading the symbols, they have been mapped.
596 if (from_tty
|| info_verbose
)
598 printf_filtered ("Mapped symbols for %s...", name
);
600 gdb_flush (gdb_stdout
);
602 init_entry_point_info (objfile
);
603 find_sym_fns (objfile
);
607 /* We either created a new mapped symbol table, mapped an existing
608 symbol table file which has not had initial symbol reading
609 performed, or need to read an unmapped symbol table. */
610 if (from_tty
|| info_verbose
)
612 printf_filtered ("Reading symbols from %s...", name
);
614 gdb_flush (gdb_stdout
);
616 syms_from_objfile (objfile
, addr
, mainline
, from_tty
);
619 /* We now have at least a partial symbol table. Check to see if the
620 user requested that all symbols be read on initial access via either
621 the gdb startup command line or on a per symbol file basis. Expand
622 all partial symbol tables for this objfile if so. */
624 if (readnow
|| readnow_symbol_files
)
626 if (from_tty
|| info_verbose
)
628 printf_filtered ("expanding to full symbols...");
630 gdb_flush (gdb_stdout
);
633 for (psymtab
= objfile
-> psymtabs
;
635 psymtab
= psymtab
-> next
)
637 psymtab_to_symtab (psymtab
);
641 if (from_tty
|| info_verbose
)
643 printf_filtered ("done.\n");
644 gdb_flush (gdb_stdout
);
647 new_symfile_objfile (objfile
, mainline
, from_tty
);
652 /* This is the symbol-file command. Read the file, analyze its
653 symbols, and add a struct symtab to a symtab list. The syntax of
654 the command is rather bizarre--(1) buildargv implements various
655 quoting conventions which are undocumented and have little or
656 nothing in common with the way things are quoted (or not quoted)
657 elsewhere in GDB, (2) options are used, which are not generally
658 used in GDB (perhaps "set mapped on", "set readnow on" would be
659 better), (3) the order of options matters, which is contrary to GNU
660 conventions (because it is confusing and inconvenient). */
663 symbol_file_command (args
, from_tty
)
669 CORE_ADDR text_relocation
= 0; /* text_relocation */
670 struct cleanup
*cleanups
;
678 if ((have_full_symbols () || have_partial_symbols ())
680 && !query ("Discard symbol table from `%s'? ",
681 symfile_objfile
-> name
))
682 error ("Not confirmed.");
683 free_all_objfiles ();
684 symfile_objfile
= NULL
;
687 printf_unfiltered ("No symbol file now.\n");
692 if ((argv
= buildargv (args
)) == NULL
)
696 cleanups
= make_cleanup (freeargv
, (char *) argv
);
697 while (*argv
!= NULL
)
699 if (STREQ (*argv
, "-mapped"))
703 else if (STREQ (*argv
, "-readnow"))
707 else if (**argv
== '-')
709 error ("unknown option `%s'", *argv
);
717 /* this is for rombug remote only, to get the text relocation by
718 using link command */
719 p
= strrchr(name
, '/');
723 target_link(p
, &text_relocation
);
725 if (text_relocation
== (CORE_ADDR
)0)
727 else if (text_relocation
== (CORE_ADDR
)-1)
728 symbol_file_add (name
, from_tty
, (CORE_ADDR
)0, 1, mapped
,
731 symbol_file_add (name
, from_tty
, (CORE_ADDR
)text_relocation
,
734 /* Getting new symbols may change our opinion about what is
736 reinit_frame_cache ();
738 set_initial_language ();
745 error ("no symbol file name was specified");
747 do_cleanups (cleanups
);
751 /* Set the initial language.
753 A better solution would be to record the language in the psymtab when reading
754 partial symbols, and then use it (if known) to set the language. This would
755 be a win for formats that encode the language in an easily discoverable place,
756 such as DWARF. For stabs, we can jump through hoops looking for specially
757 named symbols or try to intuit the language from the specific type of stabs
758 we find, but we can't do that until later when we read in full symbols.
762 set_initial_language ()
764 struct partial_symtab
*pst
;
765 enum language lang
= language_unknown
;
767 pst
= find_main_psymtab ();
770 if (pst
-> filename
!= NULL
)
772 lang
= deduce_language_from_filename (pst
-> filename
);
774 if (lang
== language_unknown
)
776 /* Make C the default language */
780 expected_language
= current_language
; /* Don't warn the user */
784 /* Open file specified by NAME and hand it off to BFD for preliminary
785 analysis. Result is a newly initialized bfd *, which includes a newly
786 malloc'd` copy of NAME (tilde-expanded and made absolute).
787 In case of trouble, error() is called. */
790 symfile_bfd_open (name
)
797 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy */
799 /* Look down path for it, allocate 2nd new malloc'd copy. */
800 desc
= openp (getenv ("PATH"), 1, name
, O_RDONLY
| O_BINARY
, 0, &absolute_name
);
803 make_cleanup (free
, name
);
804 perror_with_name (name
);
806 free (name
); /* Free 1st new malloc'd copy */
807 name
= absolute_name
; /* Keep 2nd malloc'd copy in bfd */
808 /* It'll be freed in free_objfile(). */
810 sym_bfd
= bfd_fdopenr (name
, gnutarget
, desc
);
814 make_cleanup (free
, name
);
815 error ("\"%s\": can't open to read symbols: %s.", name
,
816 bfd_errmsg (bfd_get_error ()));
818 sym_bfd
->cacheable
= true;
820 if (!bfd_check_format (sym_bfd
, bfd_object
))
822 /* FIXME: should be checking for errors from bfd_close (for one thing,
823 on error it does not free all the storage associated with the
825 bfd_close (sym_bfd
); /* This also closes desc */
826 make_cleanup (free
, name
);
827 error ("\"%s\": can't read symbols: %s.", name
,
828 bfd_errmsg (bfd_get_error ()));
834 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
835 startup by the _initialize routine in each object file format reader,
836 to register information about each format the the reader is prepared
843 sf
->next
= symtab_fns
;
848 /* Initialize to read symbols from the symbol file sym_bfd. It either
849 returns or calls error(). The result is an initialized struct sym_fns
850 in the objfile structure, that contains cached information about the
854 find_sym_fns (objfile
)
855 struct objfile
*objfile
;
858 enum bfd_flavour our_flavour
= bfd_get_flavour (objfile
-> obfd
);
859 char *our_target
= bfd_get_target (objfile
-> obfd
);
861 /* Special kludge for RS/6000. See xcoffread.c. */
862 if (STREQ (our_target
, "aixcoff-rs6000"))
863 our_flavour
= (enum bfd_flavour
)-1;
865 /* Special kludge for apollo. See dstread.c. */
866 if (STREQN (our_target
, "apollo", 6))
867 our_flavour
= (enum bfd_flavour
)-2;
869 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
-> next
)
871 if (our_flavour
== sf
-> sym_flavour
)
877 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
878 bfd_get_target (objfile
-> obfd
));
881 /* This function runs the load command of our current target. */
884 load_command (arg
, from_tty
)
889 arg
= get_exec_file (1);
890 target_load (arg
, from_tty
);
893 /* This version of "load" should be usable for any target. Currently
894 it is just used for remote targets, not inftarg.c or core files,
895 on the theory that only in that case is it useful.
897 Avoiding xmodem and the like seems like a win (a) because we don't have
898 to worry about finding it, and (b) On VMS, fork() is very slow and so
899 we don't want to run a subprocess. On the other hand, I'm not sure how
900 performance compares. */
902 generic_load (filename
, from_tty
)
906 struct cleanup
*old_cleanups
;
910 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
911 if (loadfile_bfd
== NULL
)
913 perror_with_name (filename
);
916 /* FIXME: should be checking for errors from bfd_close (for one thing,
917 on error it does not free all the storage associated with the
919 old_cleanups
= make_cleanup (bfd_close
, loadfile_bfd
);
921 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
923 error ("\"%s\" is not an object file: %s", filename
,
924 bfd_errmsg (bfd_get_error ()));
927 for (s
= loadfile_bfd
->sections
; s
; s
= s
->next
)
929 if (s
->flags
& SEC_LOAD
)
933 size
= bfd_get_section_size_before_reloc (s
);
937 struct cleanup
*old_chain
;
940 buffer
= xmalloc (size
);
941 old_chain
= make_cleanup (free
, buffer
);
943 vma
= bfd_get_section_vma (loadfile_bfd
, s
);
945 /* Is this really necessary? I guess it gives the user something
946 to look at during a long download. */
947 printf_filtered ("Loading section %s, size 0x%lx vma ",
948 bfd_get_section_name (loadfile_bfd
, s
),
949 (unsigned long) size
);
950 print_address_numeric (vma
, 1, gdb_stdout
);
951 printf_filtered ("\n");
953 bfd_get_section_contents (loadfile_bfd
, s
, buffer
, 0, size
);
955 target_write_memory (vma
, buffer
, size
);
957 do_cleanups (old_chain
);
962 /* We were doing this in remote-mips.c, I suspect it is right
963 for other targets too. */
964 write_pc (loadfile_bfd
->start_address
);
966 /* FIXME: are we supposed to call symbol_file_add or not? According to
967 a comment from remote-mips.c (where a call to symbol_file_add was
968 commented out), making the call confuses GDB if more than one file is
969 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
972 do_cleanups (old_cleanups
);
975 /* This function allows the addition of incrementally linked object files.
976 It does not modify any state in the target, only in the debugger. */
980 add_symbol_file_command (args
, from_tty
)
994 error ("add-symbol-file takes a file name and an address");
997 /* Make a copy of the string that we can safely write into. */
999 args
= strdup (args
);
1000 make_cleanup (free
, args
);
1002 /* Pick off any -option args and the file name. */
1004 while ((*args
!= '\000') && (name
== NULL
))
1006 while (isspace (*args
)) {args
++;}
1008 while ((*args
!= '\000') && !isspace (*args
)) {args
++;}
1009 if (*args
!= '\000')
1017 else if (STREQ (arg
, "-mapped"))
1021 else if (STREQ (arg
, "-readnow"))
1027 error ("unknown option `%s'", arg
);
1031 /* After picking off any options and the file name, args should be
1032 left pointing at the remainder of the command line, which should
1033 be the address expression to evaluate. */
1037 error ("add-symbol-file takes a file name");
1039 name
= tilde_expand (name
);
1040 make_cleanup (free
, name
);
1042 if (*args
!= '\000')
1044 text_addr
= parse_and_eval_address (args
);
1048 target_link(name
, &text_addr
);
1049 if (text_addr
== (CORE_ADDR
)-1)
1050 error("Don't know how to get text start location for this file");
1053 /* FIXME-32x64: Assumes text_addr fits in a long. */
1054 if (!query ("add symbol table from file \"%s\" at text_addr = %s?\n",
1055 name
, local_hex_string ((unsigned long)text_addr
)))
1056 error ("Not confirmed.");
1058 symbol_file_add (name
, 0, text_addr
, 0, mapped
, readnow
);
1060 /* Getting new symbols may change our opinion about what is
1062 reinit_frame_cache ();
1066 add_shared_symbol_files_command (args
, from_tty
)
1070 #ifdef ADD_SHARED_SYMBOL_FILES
1071 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
1073 error ("This command is not available in this configuration of GDB.");
1077 /* Re-read symbols if a symbol-file has changed. */
1081 struct objfile
*objfile
;
1084 struct stat new_statbuf
;
1087 /* With the addition of shared libraries, this should be modified,
1088 the load time should be saved in the partial symbol tables, since
1089 different tables may come from different source files. FIXME.
1090 This routine should then walk down each partial symbol table
1091 and see if the symbol table that it originates from has been changed */
1093 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
) {
1094 if (objfile
->obfd
) {
1095 #ifdef IBM6000_TARGET
1096 /* If this object is from a shared library, then you should
1097 stat on the library name, not member name. */
1099 if (objfile
->obfd
->my_archive
)
1100 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
1103 res
= stat (objfile
->name
, &new_statbuf
);
1105 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1106 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1110 new_modtime
= new_statbuf
.st_mtime
;
1111 if (new_modtime
!= objfile
->mtime
)
1113 struct cleanup
*old_cleanups
;
1114 struct section_offsets
*offsets
;
1116 int section_offsets_size
;
1117 char *obfd_filename
;
1119 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1122 /* There are various functions like symbol_file_add,
1123 symfile_bfd_open, syms_from_objfile, etc., which might
1124 appear to do what we want. But they have various other
1125 effects which we *don't* want. So we just do stuff
1126 ourselves. We don't worry about mapped files (for one thing,
1127 any mapped file will be out of date). */
1129 /* If we get an error, blow away this objfile (not sure if
1130 that is the correct response for things like shared
1132 old_cleanups
= make_cleanup (free_objfile
, objfile
);
1133 /* We need to do this whenever any symbols go away. */
1134 make_cleanup (clear_symtab_users
, 0);
1136 /* Clean up any state BFD has sitting around. We don't need
1137 to close the descriptor but BFD lacks a way of closing the
1138 BFD without closing the descriptor. */
1139 obfd_filename
= bfd_get_filename (objfile
->obfd
);
1140 if (!bfd_close (objfile
->obfd
))
1141 error ("Can't close BFD for %s: %s", objfile
->name
,
1142 bfd_errmsg (bfd_get_error ()));
1143 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
1144 if (objfile
->obfd
== NULL
)
1145 error ("Can't open %s to read symbols.", objfile
->name
);
1146 /* bfd_openr sets cacheable to true, which is what we want. */
1147 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
1148 error ("Can't read symbols from %s: %s.", objfile
->name
,
1149 bfd_errmsg (bfd_get_error ()));
1151 /* Save the offsets, we will nuke them with the rest of the
1153 num_offsets
= objfile
->num_sections
;
1154 section_offsets_size
=
1155 sizeof (struct section_offsets
)
1156 + sizeof (objfile
->section_offsets
->offsets
) * num_offsets
;
1157 offsets
= (struct section_offsets
*) alloca (section_offsets_size
);
1158 memcpy (offsets
, objfile
->section_offsets
, section_offsets_size
);
1160 /* Nuke all the state that we will re-read. Much of the following
1161 code which sets things to NULL really is necessary to tell
1162 other parts of GDB that there is nothing currently there. */
1164 /* FIXME: Do we have to free a whole linked list, or is this
1166 if (objfile
->global_psymbols
.list
)
1167 mfree (objfile
->md
, objfile
->global_psymbols
.list
);
1168 objfile
->global_psymbols
.list
= NULL
;
1169 objfile
->global_psymbols
.next
= NULL
;
1170 objfile
->global_psymbols
.size
= 0;
1171 if (objfile
->static_psymbols
.list
)
1172 mfree (objfile
->md
, objfile
->static_psymbols
.list
);
1173 objfile
->static_psymbols
.list
= NULL
;
1174 objfile
->static_psymbols
.next
= NULL
;
1175 objfile
->static_psymbols
.size
= 0;
1177 /* Free the obstacks for non-reusable objfiles */
1178 obstack_free (&objfile
-> psymbol_obstack
, 0);
1179 obstack_free (&objfile
-> symbol_obstack
, 0);
1180 obstack_free (&objfile
-> type_obstack
, 0);
1181 objfile
->sections
= NULL
;
1182 objfile
->symtabs
= NULL
;
1183 objfile
->psymtabs
= NULL
;
1184 objfile
->free_psymtabs
= NULL
;
1185 objfile
->msymbols
= NULL
;
1186 objfile
->minimal_symbol_count
= 0;
1187 objfile
->fundamental_types
= NULL
;
1188 if (objfile
-> sf
!= NULL
)
1190 (*objfile
-> sf
-> sym_finish
) (objfile
);
1193 /* We never make this a mapped file. */
1194 objfile
-> md
= NULL
;
1195 /* obstack_specify_allocation also initializes the obstack so
1197 obstack_specify_allocation (&objfile
-> psymbol_obstack
, 0, 0,
1199 obstack_specify_allocation (&objfile
-> symbol_obstack
, 0, 0,
1201 obstack_specify_allocation (&objfile
-> type_obstack
, 0, 0,
1203 if (build_objfile_section_table (objfile
))
1205 error ("Can't find the file sections in `%s': %s",
1206 objfile
-> name
, bfd_errmsg (bfd_get_error ()));
1209 /* We use the same section offsets as from last time. I'm not
1210 sure whether that is always correct for shared libraries. */
1211 objfile
->section_offsets
= (struct section_offsets
*)
1212 obstack_alloc (&objfile
-> psymbol_obstack
, section_offsets_size
);
1213 memcpy (objfile
->section_offsets
, offsets
, section_offsets_size
);
1214 objfile
->num_sections
= num_offsets
;
1216 /* What the hell is sym_new_init for, anyway? The concept of
1217 distinguishing between the main file and additional files
1218 in this way seems rather dubious. */
1219 if (objfile
== symfile_objfile
)
1220 (*objfile
->sf
->sym_new_init
) (objfile
);
1222 (*objfile
->sf
->sym_init
) (objfile
);
1223 clear_complaints (1, 1);
1224 /* The "mainline" parameter is a hideous hack; I think leaving it
1225 zero is OK since dbxread.c also does what it needs to do if
1226 objfile->global_psymbols.size is 0. */
1227 (*objfile
->sf
->sym_read
) (objfile
, objfile
->section_offsets
, 0);
1228 if (!have_partial_symbols () && !have_full_symbols ())
1231 printf_filtered ("(no debugging symbols found)\n");
1234 objfile
-> flags
|= OBJF_SYMS
;
1236 /* We're done reading the symbol file; finish off complaints. */
1237 clear_complaints (0, 1);
1239 /* Getting new symbols may change our opinion about what is
1242 reinit_frame_cache ();
1244 /* Discard cleanups as symbol reading was successful. */
1245 discard_cleanups (old_cleanups
);
1247 /* If the mtime has changed between the time we set new_modtime
1248 and now, we *want* this to be out of date, so don't call stat
1250 objfile
->mtime
= new_modtime
;
1253 /* Call this after reading in a new symbol table to give target
1254 dependant code a crack at the new symbols. For instance, this
1255 could be used to update the values of target-specific symbols GDB
1256 needs to keep track of (such as _sigtramp, or whatever). */
1258 TARGET_SYMFILE_POSTREAD (objfile
);
1264 clear_symtab_users ();
1269 deduce_language_from_filename (filename
)
1276 else if (0 == (c
= strrchr (filename
, '.')))
1277 ; /* Get default. */
1278 else if (STREQ (c
, ".c"))
1280 else if (STREQ (c
, ".cc") || STREQ (c
, ".C") || STREQ (c
, ".cxx")
1281 || STREQ (c
, ".cpp") || STREQ (c
, ".cp") || STREQ (c
, ".c++"))
1282 return language_cplus
;
1283 else if (STREQ (c
, ".ch") || STREQ (c
, ".c186") || STREQ (c
, ".c286"))
1284 return language_chill
;
1285 else if (STREQ (c
, ".f") || STREQ (c
, ".F"))
1286 return language_fortran
;
1287 else if (STREQ (c
, ".mod"))
1289 else if (STREQ (c
, ".s") || STREQ (c
, ".S"))
1290 return language_asm
;
1292 return language_unknown
; /* default */
1297 Allocate and partly initialize a new symbol table. Return a pointer
1298 to it. error() if no space.
1300 Caller must set these fields:
1306 initialize any EXTRA_SYMTAB_INFO
1307 possibly free_named_symtabs (symtab->filename);
1311 allocate_symtab (filename
, objfile
)
1313 struct objfile
*objfile
;
1315 register struct symtab
*symtab
;
1317 symtab
= (struct symtab
*)
1318 obstack_alloc (&objfile
-> symbol_obstack
, sizeof (struct symtab
));
1319 memset (symtab
, 0, sizeof (*symtab
));
1320 symtab
-> filename
= obsavestring (filename
, strlen (filename
),
1321 &objfile
-> symbol_obstack
);
1322 symtab
-> fullname
= NULL
;
1323 symtab
-> language
= deduce_language_from_filename (filename
);
1325 /* Hook it to the objfile it comes from */
1327 symtab
-> objfile
= objfile
;
1328 symtab
-> next
= objfile
-> symtabs
;
1329 objfile
-> symtabs
= symtab
;
1331 #ifdef INIT_EXTRA_SYMTAB_INFO
1332 INIT_EXTRA_SYMTAB_INFO (symtab
);
1338 struct partial_symtab
*
1339 allocate_psymtab (filename
, objfile
)
1341 struct objfile
*objfile
;
1343 struct partial_symtab
*psymtab
;
1345 if (objfile
-> free_psymtabs
)
1347 psymtab
= objfile
-> free_psymtabs
;
1348 objfile
-> free_psymtabs
= psymtab
-> next
;
1351 psymtab
= (struct partial_symtab
*)
1352 obstack_alloc (&objfile
-> psymbol_obstack
,
1353 sizeof (struct partial_symtab
));
1355 memset (psymtab
, 0, sizeof (struct partial_symtab
));
1356 psymtab
-> filename
= obsavestring (filename
, strlen (filename
),
1357 &objfile
-> psymbol_obstack
);
1358 psymtab
-> symtab
= NULL
;
1360 /* Hook it to the objfile it comes from */
1362 psymtab
-> objfile
= objfile
;
1363 psymtab
-> next
= objfile
-> psymtabs
;
1364 objfile
-> psymtabs
= psymtab
;
1370 /* Reset all data structures in gdb which may contain references to symbol
1374 clear_symtab_users ()
1376 /* Someday, we should do better than this, by only blowing away
1377 the things that really need to be blown. */
1378 clear_value_history ();
1380 clear_internalvars ();
1381 breakpoint_re_set ();
1382 set_default_breakpoint (0, 0, 0, 0);
1383 current_source_symtab
= 0;
1384 current_source_line
= 0;
1385 clear_pc_function_cache ();
1388 /* clear_symtab_users_once:
1390 This function is run after symbol reading, or from a cleanup.
1391 If an old symbol table was obsoleted, the old symbol table
1392 has been blown away, but the other GDB data structures that may
1393 reference it have not yet been cleared or re-directed. (The old
1394 symtab was zapped, and the cleanup queued, in free_named_symtab()
1397 This function can be queued N times as a cleanup, or called
1398 directly; it will do all the work the first time, and then will be a
1399 no-op until the next time it is queued. This works by bumping a
1400 counter at queueing time. Much later when the cleanup is run, or at
1401 the end of symbol processing (in case the cleanup is discarded), if
1402 the queued count is greater than the "done-count", we do the work
1403 and set the done-count to the queued count. If the queued count is
1404 less than or equal to the done-count, we just ignore the call. This
1405 is needed because reading a single .o file will often replace many
1406 symtabs (one per .h file, for example), and we don't want to reset
1407 the breakpoints N times in the user's face.
1409 The reason we both queue a cleanup, and call it directly after symbol
1410 reading, is because the cleanup protects us in case of errors, but is
1411 discarded if symbol reading is successful. */
1414 /* FIXME: As free_named_symtabs is currently a big noop this function
1415 is no longer needed. */
1417 clear_symtab_users_once
PARAMS ((void));
1419 static int clear_symtab_users_queued
;
1420 static int clear_symtab_users_done
;
1423 clear_symtab_users_once ()
1425 /* Enforce once-per-`do_cleanups'-semantics */
1426 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
1428 clear_symtab_users_done
= clear_symtab_users_queued
;
1430 clear_symtab_users ();
1434 /* Delete the specified psymtab, and any others that reference it. */
1437 cashier_psymtab (pst
)
1438 struct partial_symtab
*pst
;
1440 struct partial_symtab
*ps
, *pprev
= NULL
;
1443 /* Find its previous psymtab in the chain */
1444 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
) {
1451 /* Unhook it from the chain. */
1452 if (ps
== pst
->objfile
->psymtabs
)
1453 pst
->objfile
->psymtabs
= ps
->next
;
1455 pprev
->next
= ps
->next
;
1457 /* FIXME, we can't conveniently deallocate the entries in the
1458 partial_symbol lists (global_psymbols/static_psymbols) that
1459 this psymtab points to. These just take up space until all
1460 the psymtabs are reclaimed. Ditto the dependencies list and
1461 filename, which are all in the psymbol_obstack. */
1463 /* We need to cashier any psymtab that has this one as a dependency... */
1465 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
) {
1466 for (i
= 0; i
< ps
->number_of_dependencies
; i
++) {
1467 if (ps
->dependencies
[i
] == pst
) {
1468 cashier_psymtab (ps
);
1469 goto again
; /* Must restart, chain has been munged. */
1476 /* If a symtab or psymtab for filename NAME is found, free it along
1477 with any dependent breakpoints, displays, etc.
1478 Used when loading new versions of object modules with the "add-file"
1479 command. This is only called on the top-level symtab or psymtab's name;
1480 it is not called for subsidiary files such as .h files.
1482 Return value is 1 if we blew away the environment, 0 if not.
1483 FIXME. The return valu appears to never be used.
1485 FIXME. I think this is not the best way to do this. We should
1486 work on being gentler to the environment while still cleaning up
1487 all stray pointers into the freed symtab. */
1490 free_named_symtabs (name
)
1494 /* FIXME: With the new method of each objfile having it's own
1495 psymtab list, this function needs serious rethinking. In particular,
1496 why was it ever necessary to toss psymtabs with specific compilation
1497 unit filenames, as opposed to all psymtabs from a particular symbol
1499 Well, the answer is that some systems permit reloading of particular
1500 compilation units. We want to blow away any old info about these
1501 compilation units, regardless of which objfiles they arrived in. --gnu. */
1503 register struct symtab
*s
;
1504 register struct symtab
*prev
;
1505 register struct partial_symtab
*ps
;
1506 struct blockvector
*bv
;
1509 /* We only wack things if the symbol-reload switch is set. */
1510 if (!symbol_reloading
)
1513 /* Some symbol formats have trouble providing file names... */
1514 if (name
== 0 || *name
== '\0')
1517 /* Look for a psymtab with the specified name. */
1520 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
) {
1521 if (STREQ (name
, ps
->filename
)) {
1522 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
1523 goto again2
; /* Must restart, chain has been munged */
1527 /* Look for a symtab with the specified name. */
1529 for (s
= symtab_list
; s
; s
= s
->next
)
1531 if (STREQ (name
, s
->filename
))
1538 if (s
== symtab_list
)
1539 symtab_list
= s
->next
;
1541 prev
->next
= s
->next
;
1543 /* For now, queue a delete for all breakpoints, displays, etc., whether
1544 or not they depend on the symtab being freed. This should be
1545 changed so that only those data structures affected are deleted. */
1547 /* But don't delete anything if the symtab is empty.
1548 This test is necessary due to a bug in "dbxread.c" that
1549 causes empty symtabs to be created for N_SO symbols that
1550 contain the pathname of the object file. (This problem
1551 has been fixed in GDB 3.9x). */
1553 bv
= BLOCKVECTOR (s
);
1554 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
1555 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
1556 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
1558 complain (&oldsyms_complaint
, name
);
1560 clear_symtab_users_queued
++;
1561 make_cleanup (clear_symtab_users_once
, 0);
1564 complain (&empty_symtab_complaint
, name
);
1571 /* It is still possible that some breakpoints will be affected
1572 even though no symtab was found, since the file might have
1573 been compiled without debugging, and hence not be associated
1574 with a symtab. In order to handle this correctly, we would need
1575 to keep a list of text address ranges for undebuggable files.
1576 For now, we do nothing, since this is a fairly obscure case. */
1580 /* FIXME, what about the minimal symbol table? */
1587 /* Allocate and partially fill a partial symtab. It will be
1588 completely filled at the end of the symbol list.
1590 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1591 is the address relative to which its symbols are (incremental) or 0
1595 struct partial_symtab
*
1596 start_psymtab_common (objfile
, section_offsets
,
1597 filename
, textlow
, global_syms
, static_syms
)
1598 struct objfile
*objfile
;
1599 struct section_offsets
*section_offsets
;
1602 struct partial_symbol
*global_syms
;
1603 struct partial_symbol
*static_syms
;
1605 struct partial_symtab
*psymtab
;
1607 psymtab
= allocate_psymtab (filename
, objfile
);
1608 psymtab
-> section_offsets
= section_offsets
;
1609 psymtab
-> textlow
= textlow
;
1610 psymtab
-> texthigh
= psymtab
-> textlow
; /* default */
1611 psymtab
-> globals_offset
= global_syms
- objfile
-> global_psymbols
.list
;
1612 psymtab
-> statics_offset
= static_syms
- objfile
-> static_psymbols
.list
;
1616 /* Debugging versions of functions that are usually inline macros
1619 #if !INLINE_ADD_PSYMBOL
1621 /* Add a symbol with a long value to a psymtab.
1622 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
1625 add_psymbol_to_list (name
, namelength
, namespace, class, list
, val
, language
,
1629 enum namespace namespace;
1630 enum address_class
class;
1631 struct psymbol_allocation_list
*list
;
1633 enum language language
;
1634 struct objfile
*objfile
;
1636 register struct partial_symbol
*psym
;
1637 register char *demangled_name
;
1639 if (list
->next
>= list
->list
+ list
->size
)
1641 extend_psymbol_list (list
,objfile
);
1643 psym
= list
->next
++;
1645 SYMBOL_NAME (psym
) =
1646 (char *) obstack_alloc (&objfile
->psymbol_obstack
, namelength
+ 1);
1647 memcpy (SYMBOL_NAME (psym
), name
, namelength
);
1648 SYMBOL_NAME (psym
)[namelength
] = '\0';
1649 SYMBOL_VALUE (psym
) = val
;
1650 SYMBOL_SECTION (psym
) = 0;
1651 SYMBOL_LANGUAGE (psym
) = language
;
1652 PSYMBOL_NAMESPACE (psym
) = namespace;
1653 PSYMBOL_CLASS (psym
) = class;
1654 SYMBOL_INIT_LANGUAGE_SPECIFIC (psym
, language
);
1657 /* Add a symbol with a CORE_ADDR value to a psymtab. */
1660 add_psymbol_addr_to_list (name
, namelength
, namespace, class, list
, val
,
1664 enum namespace namespace;
1665 enum address_class
class;
1666 struct psymbol_allocation_list
*list
;
1668 enum language language
;
1669 struct objfile
*objfile
;
1671 register struct partial_symbol
*psym
;
1672 register char *demangled_name
;
1674 if (list
->next
>= list
->list
+ list
->size
)
1676 extend_psymbol_list (list
,objfile
);
1678 psym
= list
->next
++;
1680 SYMBOL_NAME (psym
) =
1681 (char *) obstack_alloc (&objfile
->psymbol_obstack
, namelength
+ 1);
1682 memcpy (SYMBOL_NAME (psym
), name
, namelength
);
1683 SYMBOL_NAME (psym
)[namelength
] = '\0';
1684 SYMBOL_VALUE_ADDRESS (psym
) = val
;
1685 SYMBOL_SECTION (psym
) = 0;
1686 SYMBOL_LANGUAGE (psym
) = language
;
1687 PSYMBOL_NAMESPACE (psym
) = namespace;
1688 PSYMBOL_CLASS (psym
) = class;
1689 SYMBOL_INIT_LANGUAGE_SPECIFIC (psym
, language
);
1692 #endif /* !INLINE_ADD_PSYMBOL */
1694 /* Initialize storage for partial symbols. */
1697 init_psymbol_list (objfile
, total_symbols
)
1698 struct objfile
*objfile
;
1701 /* Free any previously allocated psymbol lists. */
1703 if (objfile
-> global_psymbols
.list
)
1705 mfree (objfile
-> md
, (PTR
)objfile
-> global_psymbols
.list
);
1707 if (objfile
-> static_psymbols
.list
)
1709 mfree (objfile
-> md
, (PTR
)objfile
-> static_psymbols
.list
);
1712 /* Current best guess is that approximately a twentieth
1713 of the total symbols (in a debugging file) are global or static
1716 objfile
-> global_psymbols
.size
= total_symbols
/ 10;
1717 objfile
-> static_psymbols
.size
= total_symbols
/ 10;
1718 objfile
-> global_psymbols
.next
=
1719 objfile
-> global_psymbols
.list
= (struct partial_symbol
*)
1720 xmmalloc (objfile
-> md
, objfile
-> global_psymbols
.size
1721 * sizeof (struct partial_symbol
));
1722 objfile
-> static_psymbols
.next
=
1723 objfile
-> static_psymbols
.list
= (struct partial_symbol
*)
1724 xmmalloc (objfile
-> md
, objfile
-> static_psymbols
.size
1725 * sizeof (struct partial_symbol
));
1729 _initialize_symfile ()
1731 struct cmd_list_element
*c
;
1733 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
,
1734 "Load symbol table from executable file FILE.\n\
1735 The `file' command can also load symbol tables, as well as setting the file\n\
1736 to execute.", &cmdlist
);
1737 c
->completer
= filename_completer
;
1739 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
,
1740 "Usage: add-symbol-file FILE ADDR\n\
1741 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
1742 ADDR is the starting address of the file's text.",
1744 c
->completer
= filename_completer
;
1746 c
= add_cmd ("add-shared-symbol-files", class_files
,
1747 add_shared_symbol_files_command
,
1748 "Load the symbols from shared objects in the dynamic linker's link map.",
1750 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
1753 c
= add_cmd ("load", class_files
, load_command
,
1754 "Dynamically load FILE into the running program, and record its symbols\n\
1755 for access from GDB.", &cmdlist
);
1756 c
->completer
= filename_completer
;
1759 (add_set_cmd ("symbol-reloading", class_support
, var_boolean
,
1760 (char *)&symbol_reloading
,
1761 "Set dynamic symbol table reloading multiple times in one run.",