1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
36 #include "breakpoint.h"
38 #include "complaints.h"
40 #include "inferior.h" /* for write_pc */
41 #include "gdb-stabs.h"
42 #include "gdb_obstack.h"
43 #include "completer.h"
45 #include <readline/readline.h>
46 #include "gdb_assert.h"
48 #include <sys/types.h>
50 #include "gdb_string.h"
61 /* Some HP-UX related globals to clear when a new "main"
62 symbol file is loaded. HP-specific. */
64 extern int hp_som_som_object_present;
65 extern int hp_cxx_exception_support_initialized;
66 #define RESET_HP_UX_GLOBALS() do {\
67 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
68 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
72 int (*ui_load_progress_hook) (const char *section, unsigned long num);
73 void (*show_load_progress) (const char *section,
74 unsigned long section_sent,
75 unsigned long section_size,
76 unsigned long total_sent,
77 unsigned long total_size);
78 void (*pre_add_symbol_hook) (char *);
79 void (*post_add_symbol_hook) (void);
80 void (*target_new_objfile_hook) (struct objfile *);
82 static void clear_symtab_users_cleanup (void *ignore);
84 /* Global variables owned by this file */
85 int readnow_symbol_files; /* Read full symbols immediately */
87 /* External variables and functions referenced. */
89 extern void report_transfer_performance (unsigned long, time_t, time_t);
91 /* Functions this file defines */
94 static int simple_read_overlay_region_table (void);
95 static void simple_free_overlay_region_table (void);
98 static void set_initial_language (void);
100 static void load_command (char *, int);
102 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
104 static void add_symbol_file_command (char *, int);
106 static void add_shared_symbol_files_command (char *, int);
108 static void cashier_psymtab (struct partial_symtab *);
110 bfd *symfile_bfd_open (char *);
112 int get_section_index (struct objfile *, char *);
114 static void find_sym_fns (struct objfile *);
116 static void decrement_reading_symtab (void *);
118 static void overlay_invalidate_all (void);
120 static int overlay_is_mapped (struct obj_section *);
122 void list_overlays_command (char *, int);
124 void map_overlay_command (char *, int);
126 void unmap_overlay_command (char *, int);
128 static void overlay_auto_command (char *, int);
130 static void overlay_manual_command (char *, int);
132 static void overlay_off_command (char *, int);
134 static void overlay_load_command (char *, int);
136 static void overlay_command (char *, int);
138 static void simple_free_overlay_table (void);
140 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
142 static int simple_read_overlay_table (void);
144 static int simple_overlay_update_1 (struct obj_section *);
146 static void add_filename_language (char *ext, enum language lang);
148 static void set_ext_lang_command (char *args, int from_tty);
150 static void info_ext_lang_command (char *args, int from_tty);
152 static void init_filename_language_table (void);
154 void _initialize_symfile (void);
156 /* List of all available sym_fns. On gdb startup, each object file reader
157 calls add_symtab_fns() to register information on each format it is
160 static struct sym_fns *symtab_fns = NULL;
162 /* Flag for whether user will be reloading symbols multiple times.
163 Defaults to ON for VxWorks, otherwise OFF. */
165 #ifdef SYMBOL_RELOADING_DEFAULT
166 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
168 int symbol_reloading = 0;
171 /* If non-zero, shared library symbols will be added automatically
172 when the inferior is created, new libraries are loaded, or when
173 attaching to the inferior. This is almost always what users will
174 want to have happen; but for very large programs, the startup time
175 will be excessive, and so if this is a problem, the user can clear
176 this flag and then add the shared library symbols as needed. Note
177 that there is a potential for confusion, since if the shared
178 library symbols are not loaded, commands like "info fun" will *not*
179 report all the functions that are actually present. */
181 int auto_solib_add = 1;
183 /* For systems that support it, a threshold size in megabytes. If
184 automatically adding a new library's symbol table to those already
185 known to the debugger would cause the total shared library symbol
186 size to exceed this threshhold, then the shlib's symbols are not
187 added. The threshold is ignored if the user explicitly asks for a
188 shlib to be added, such as when using the "sharedlibrary"
191 int auto_solib_limit;
194 /* Since this function is called from within qsort, in an ANSI environment
195 it must conform to the prototype for qsort, which specifies that the
196 comparison function takes two "void *" pointers. */
199 compare_symbols (const void *s1p, const void *s2p)
201 register struct symbol **s1, **s2;
203 s1 = (struct symbol **) s1p;
204 s2 = (struct symbol **) s2p;
205 return (strcmp (SYMBOL_SOURCE_NAME (*s1), SYMBOL_SOURCE_NAME (*s2)));
212 compare_psymbols -- compare two partial symbols by name
216 Given pointers to pointers to two partial symbol table entries,
217 compare them by name and return -N, 0, or +N (ala strcmp).
218 Typically used by sorting routines like qsort().
222 Does direct compare of first two characters before punting
223 and passing to strcmp for longer compares. Note that the
224 original version had a bug whereby two null strings or two
225 identically named one character strings would return the
226 comparison of memory following the null byte.
231 compare_psymbols (const void *s1p, const void *s2p)
233 register struct partial_symbol **s1, **s2;
234 register char *st1, *st2;
236 s1 = (struct partial_symbol **) s1p;
237 s2 = (struct partial_symbol **) s2p;
238 st1 = SYMBOL_SOURCE_NAME (*s1);
239 st2 = SYMBOL_SOURCE_NAME (*s2);
242 if ((st1[0] - st2[0]) || !st1[0])
244 return (st1[0] - st2[0]);
246 else if ((st1[1] - st2[1]) || !st1[1])
248 return (st1[1] - st2[1]);
252 return (strcmp (st1, st2));
257 sort_pst_symbols (struct partial_symtab *pst)
259 /* Sort the global list; don't sort the static list */
261 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
262 pst->n_global_syms, sizeof (struct partial_symbol *),
266 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
269 sort_block_syms (register struct block *b)
271 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
272 sizeof (struct symbol *), compare_symbols);
275 /* Call sort_symtab_syms to sort alphabetically
276 the symbols of each block of one symtab. */
279 sort_symtab_syms (register struct symtab *s)
281 register struct blockvector *bv;
284 register struct block *b;
288 bv = BLOCKVECTOR (s);
289 nbl = BLOCKVECTOR_NBLOCKS (bv);
290 for (i = 0; i < nbl; i++)
292 b = BLOCKVECTOR_BLOCK (bv, i);
293 if (BLOCK_SHOULD_SORT (b))
298 /* Make a null terminated copy of the string at PTR with SIZE characters in
299 the obstack pointed to by OBSTACKP . Returns the address of the copy.
300 Note that the string at PTR does not have to be null terminated, I.E. it
301 may be part of a larger string and we are only saving a substring. */
304 obsavestring (const char *ptr, int size, struct obstack *obstackp)
306 register char *p = (char *) obstack_alloc (obstackp, size + 1);
307 /* Open-coded memcpy--saves function call time. These strings are usually
308 short. FIXME: Is this really still true with a compiler that can
311 register const char *p1 = ptr;
312 register char *p2 = p;
313 const char *end = ptr + size;
321 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
322 in the obstack pointed to by OBSTACKP. */
325 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
328 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
329 register char *val = (char *) obstack_alloc (obstackp, len);
336 /* True if we are nested inside psymtab_to_symtab. */
338 int currently_reading_symtab = 0;
341 decrement_reading_symtab (void *dummy)
343 currently_reading_symtab--;
346 /* Get the symbol table that corresponds to a partial_symtab.
347 This is fast after the first time you do it. In fact, there
348 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
352 psymtab_to_symtab (register struct partial_symtab *pst)
354 /* If it's been looked up before, return it. */
358 /* If it has not yet been read in, read it. */
361 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
362 currently_reading_symtab++;
363 (*pst->read_symtab) (pst);
364 do_cleanups (back_to);
370 /* Initialize entry point information for this objfile. */
373 init_entry_point_info (struct objfile *objfile)
375 /* Save startup file's range of PC addresses to help blockframe.c
376 decide where the bottom of the stack is. */
378 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
380 /* Executable file -- record its entry point so we'll recognize
381 the startup file because it contains the entry point. */
382 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
386 /* Examination of non-executable.o files. Short-circuit this stuff. */
387 objfile->ei.entry_point = INVALID_ENTRY_POINT;
389 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
390 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
391 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
392 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
393 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
394 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
397 /* Get current entry point address. */
400 entry_point_address (void)
402 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
405 /* Remember the lowest-addressed loadable section we've seen.
406 This function is called via bfd_map_over_sections.
408 In case of equal vmas, the section with the largest size becomes the
409 lowest-addressed loadable section.
411 If the vmas and sizes are equal, the last section is considered the
412 lowest-addressed loadable section. */
415 find_lowest_section (bfd *abfd, asection *sect, void *obj)
417 asection **lowest = (asection **) obj;
419 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
422 *lowest = sect; /* First loadable section */
423 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
424 *lowest = sect; /* A lower loadable section */
425 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
426 && (bfd_section_size (abfd, (*lowest))
427 <= bfd_section_size (abfd, sect)))
432 /* Build (allocate and populate) a section_addr_info struct from
433 an existing section table. */
435 extern struct section_addr_info *
436 build_section_addr_info_from_section_table (const struct section_table *start,
437 const struct section_table *end)
439 struct section_addr_info *sap;
440 const struct section_table *stp;
443 sap = xmalloc (sizeof (struct section_addr_info));
444 memset (sap, 0, sizeof (struct section_addr_info));
446 for (stp = start, oidx = 0; stp != end; stp++)
448 if (bfd_get_section_flags (stp->bfd,
449 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
450 && oidx < MAX_SECTIONS)
452 sap->other[oidx].addr = stp->addr;
453 sap->other[oidx].name
454 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
455 sap->other[oidx].sectindex = stp->the_bfd_section->index;
464 /* Free all memory allocated by build_section_addr_info_from_section_table. */
467 free_section_addr_info (struct section_addr_info *sap)
471 for (idx = 0; idx < MAX_SECTIONS; idx++)
472 if (sap->other[idx].name)
473 xfree (sap->other[idx].name);
478 /* Initialize OBJFILE's sect_index_* members. */
480 init_objfile_sect_indices (struct objfile *objfile)
485 sect = bfd_get_section_by_name (objfile->obfd, ".text");
487 objfile->sect_index_text = sect->index;
489 sect = bfd_get_section_by_name (objfile->obfd, ".data");
491 objfile->sect_index_data = sect->index;
493 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
495 objfile->sect_index_bss = sect->index;
497 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
499 objfile->sect_index_rodata = sect->index;
501 /* This is where things get really weird... We MUST have valid
502 indices for the various sect_index_* members or gdb will abort.
503 So if for example, there is no ".text" section, we have to
504 accomodate that. Except when explicitly adding symbol files at
505 some address, section_offsets contains nothing but zeros, so it
506 doesn't matter which slot in section_offsets the individual
507 sect_index_* members index into. So if they are all zero, it is
508 safe to just point all the currently uninitialized indices to the
511 for (i = 0; i < objfile->num_sections; i++)
513 if (ANOFFSET (objfile->section_offsets, i) != 0)
518 if (i == objfile->num_sections)
520 if (objfile->sect_index_text == -1)
521 objfile->sect_index_text = 0;
522 if (objfile->sect_index_data == -1)
523 objfile->sect_index_data = 0;
524 if (objfile->sect_index_bss == -1)
525 objfile->sect_index_bss = 0;
526 if (objfile->sect_index_rodata == -1)
527 objfile->sect_index_rodata = 0;
532 /* Parse the user's idea of an offset for dynamic linking, into our idea
533 of how to represent it for fast symbol reading. This is the default
534 version of the sym_fns.sym_offsets function for symbol readers that
535 don't need to do anything special. It allocates a section_offsets table
536 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
539 default_symfile_offsets (struct objfile *objfile,
540 struct section_addr_info *addrs)
544 objfile->num_sections = SECT_OFF_MAX;
545 objfile->section_offsets = (struct section_offsets *)
546 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
547 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
549 /* Now calculate offsets for section that were specified by the
551 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
553 struct other_sections *osp ;
555 osp = &addrs->other[i] ;
559 /* Record all sections in offsets */
560 /* The section_offsets in the objfile are here filled in using
562 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
565 /* Remember the bfd indexes for the .text, .data, .bss and
567 init_objfile_sect_indices (objfile);
571 /* Process a symbol file, as either the main file or as a dynamically
574 OBJFILE is where the symbols are to be read from.
576 ADDRS is the list of section load addresses. If the user has given
577 an 'add-symbol-file' command, then this is the list of offsets and
578 addresses he or she provided as arguments to the command; or, if
579 we're handling a shared library, these are the actual addresses the
580 sections are loaded at, according to the inferior's dynamic linker
581 (as gleaned by GDB's shared library code). We convert each address
582 into an offset from the section VMA's as it appears in the object
583 file, and then call the file's sym_offsets function to convert this
584 into a format-specific offset table --- a `struct section_offsets'.
585 If ADDRS is non-zero, OFFSETS must be zero.
587 OFFSETS is a table of section offsets already in the right
588 format-specific representation. NUM_OFFSETS is the number of
589 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
590 assume this is the proper table the call to sym_offsets described
591 above would produce. Instead of calling sym_offsets, we just dump
592 it right into objfile->section_offsets. (When we're re-reading
593 symbols from an objfile, we don't have the original load address
594 list any more; all we have is the section offset table.) If
595 OFFSETS is non-zero, ADDRS must be zero.
597 MAINLINE is nonzero if this is the main symbol file, or zero if
598 it's an extra symbol file such as dynamically loaded code.
600 VERBO is nonzero if the caller has printed a verbose message about
601 the symbol reading (and complaints can be more terse about it). */
604 syms_from_objfile (struct objfile *objfile,
605 struct section_addr_info *addrs,
606 struct section_offsets *offsets,
611 asection *lower_sect;
613 CORE_ADDR lower_offset;
614 struct section_addr_info local_addr;
615 struct cleanup *old_chain;
618 gdb_assert (! (addrs && offsets));
620 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
621 list. We now establish the convention that an addr of zero means
622 no load address was specified. */
623 if (! addrs && ! offsets)
625 memset (&local_addr, 0, sizeof (local_addr));
629 /* Now either addrs or offsets is non-zero. */
631 init_entry_point_info (objfile);
632 find_sym_fns (objfile);
634 if (objfile->sf == NULL)
635 return; /* No symbols. */
637 /* Make sure that partially constructed symbol tables will be cleaned up
638 if an error occurs during symbol reading. */
639 old_chain = make_cleanup_free_objfile (objfile);
643 /* We will modify the main symbol table, make sure that all its users
644 will be cleaned up if an error occurs during symbol reading. */
645 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
647 /* Since no error yet, throw away the old symbol table. */
649 if (symfile_objfile != NULL)
651 free_objfile (symfile_objfile);
652 symfile_objfile = NULL;
655 /* Currently we keep symbols from the add-symbol-file command.
656 If the user wants to get rid of them, they should do "symbol-file"
657 without arguments first. Not sure this is the best behavior
660 (*objfile->sf->sym_new_init) (objfile);
663 /* Convert addr into an offset rather than an absolute address.
664 We find the lowest address of a loaded segment in the objfile,
665 and assume that <addr> is where that got loaded.
667 We no longer warn if the lowest section is not a text segment (as
668 happens for the PA64 port. */
671 /* Find lowest loadable section to be used as starting point for
672 continguous sections. FIXME!! won't work without call to find
673 .text first, but this assumes text is lowest section. */
674 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
675 if (lower_sect == NULL)
676 bfd_map_over_sections (objfile->obfd, find_lowest_section,
678 if (lower_sect == NULL)
679 warning ("no loadable sections found in added symbol-file %s",
682 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
683 warning ("Lowest section in %s is %s at %s",
685 bfd_section_name (objfile->obfd, lower_sect),
686 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
687 if (lower_sect != NULL)
688 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
692 /* Calculate offsets for the loadable sections.
693 FIXME! Sections must be in order of increasing loadable section
694 so that contiguous sections can use the lower-offset!!!
696 Adjust offsets if the segments are not contiguous.
697 If the section is contiguous, its offset should be set to
698 the offset of the highest loadable section lower than it
699 (the loadable section directly below it in memory).
700 this_offset = lower_offset = lower_addr - lower_orig_addr */
702 /* Calculate offsets for sections. */
704 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
706 if (addrs->other[i].addr != 0)
708 sect = bfd_get_section_by_name (objfile->obfd,
709 addrs->other[i].name);
713 -= bfd_section_vma (objfile->obfd, sect);
714 lower_offset = addrs->other[i].addr;
715 /* This is the index used by BFD. */
716 addrs->other[i].sectindex = sect->index ;
720 warning ("section %s not found in %s",
721 addrs->other[i].name,
723 addrs->other[i].addr = 0;
727 addrs->other[i].addr = lower_offset;
731 /* Initialize symbol reading routines for this objfile, allow complaints to
732 appear for this new file, and record how verbose to be, then do the
733 initial symbol reading for this file. */
735 (*objfile->sf->sym_init) (objfile);
736 clear_complaints (&symfile_complaints, 1, verbo);
739 (*objfile->sf->sym_offsets) (objfile, addrs);
742 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
744 /* Just copy in the offset table directly as given to us. */
745 objfile->num_sections = num_offsets;
746 objfile->section_offsets
747 = ((struct section_offsets *)
748 obstack_alloc (&objfile->psymbol_obstack, size));
749 memcpy (objfile->section_offsets, offsets, size);
751 init_objfile_sect_indices (objfile);
754 #ifndef IBM6000_TARGET
755 /* This is a SVR4/SunOS specific hack, I think. In any event, it
756 screws RS/6000. sym_offsets should be doing this sort of thing,
757 because it knows the mapping between bfd sections and
759 /* This is a hack. As far as I can tell, section offsets are not
760 target dependent. They are all set to addr with a couple of
761 exceptions. The exceptions are sysvr4 shared libraries, whose
762 offsets are kept in solib structures anyway and rs6000 xcoff
763 which handles shared libraries in a completely unique way.
765 Section offsets are built similarly, except that they are built
766 by adding addr in all cases because there is no clear mapping
767 from section_offsets into actual sections. Note that solib.c
768 has a different algorithm for finding section offsets.
770 These should probably all be collapsed into some target
771 independent form of shared library support. FIXME. */
775 struct obj_section *s;
777 /* Map section offsets in "addr" back to the object's
778 sections by comparing the section names with bfd's
779 section names. Then adjust the section address by
780 the offset. */ /* for gdb/13815 */
782 ALL_OBJFILE_OSECTIONS (objfile, s)
784 CORE_ADDR s_addr = 0;
788 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
790 if (strcmp (bfd_section_name (s->objfile->obfd,
792 addrs->other[i].name) == 0)
793 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
795 s->addr -= s->offset;
797 s->endaddr -= s->offset;
798 s->endaddr += s_addr;
802 #endif /* not IBM6000_TARGET */
804 (*objfile->sf->sym_read) (objfile, mainline);
806 if (!have_partial_symbols () && !have_full_symbols ())
809 printf_filtered ("(no debugging symbols found)...");
813 /* Don't allow char * to have a typename (else would get caddr_t).
814 Ditto void *. FIXME: Check whether this is now done by all the
815 symbol readers themselves (many of them now do), and if so remove
818 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
819 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
821 /* Mark the objfile has having had initial symbol read attempted. Note
822 that this does not mean we found any symbols... */
824 objfile->flags |= OBJF_SYMS;
826 /* Discard cleanups as symbol reading was successful. */
828 discard_cleanups (old_chain);
830 /* Call this after reading in a new symbol table to give target
831 dependent code a crack at the new symbols. For instance, this
832 could be used to update the values of target-specific symbols GDB
833 needs to keep track of (such as _sigtramp, or whatever). */
835 TARGET_SYMFILE_POSTREAD (objfile);
838 /* Perform required actions after either reading in the initial
839 symbols for a new objfile, or mapping in the symbols from a reusable
843 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
846 /* If this is the main symbol file we have to clean up all users of the
847 old main symbol file. Otherwise it is sufficient to fixup all the
848 breakpoints that may have been redefined by this symbol file. */
851 /* OK, make it the "real" symbol file. */
852 symfile_objfile = objfile;
854 clear_symtab_users ();
858 breakpoint_re_set ();
861 /* We're done reading the symbol file; finish off complaints. */
862 clear_complaints (&symfile_complaints, 0, verbo);
865 /* Process a symbol file, as either the main file or as a dynamically
868 NAME is the file name (which will be tilde-expanded and made
869 absolute herein) (but we don't free or modify NAME itself).
871 FROM_TTY says how verbose to be.
873 MAINLINE specifies whether this is the main symbol file, or whether
874 it's an extra symbol file such as dynamically loaded code.
876 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
877 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
880 Upon success, returns a pointer to the objfile that was added.
881 Upon failure, jumps back to command level (never returns). */
882 static struct objfile *
883 symbol_file_add_with_addrs_or_offsets (char *name, int from_tty,
884 struct section_addr_info *addrs,
885 struct section_offsets *offsets,
887 int mainline, int flags)
889 struct objfile *objfile;
890 struct partial_symtab *psymtab;
893 /* Open a bfd for the file, and give user a chance to burp if we'd be
894 interactively wiping out any existing symbols. */
896 abfd = symfile_bfd_open (name);
898 if ((have_full_symbols () || have_partial_symbols ())
901 && !query ("Load new symbol table from \"%s\"? ", name))
902 error ("Not confirmed.");
904 objfile = allocate_objfile (abfd, flags);
906 /* If the objfile uses a mapped symbol file, and we have a psymtab for
907 it, then skip reading any symbols at this time. */
909 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
911 /* We mapped in an existing symbol table file that already has had
912 initial symbol reading performed, so we can skip that part. Notify
913 the user that instead of reading the symbols, they have been mapped.
915 if (from_tty || info_verbose)
917 printf_filtered ("Mapped symbols for %s...", name);
919 gdb_flush (gdb_stdout);
921 init_entry_point_info (objfile);
922 find_sym_fns (objfile);
926 /* We either created a new mapped symbol table, mapped an existing
927 symbol table file which has not had initial symbol reading
928 performed, or need to read an unmapped symbol table. */
929 if (from_tty || info_verbose)
931 if (pre_add_symbol_hook)
932 pre_add_symbol_hook (name);
935 printf_filtered ("Reading symbols from %s...", name);
937 gdb_flush (gdb_stdout);
940 syms_from_objfile (objfile, addrs, offsets, num_offsets,
944 /* We now have at least a partial symbol table. Check to see if the
945 user requested that all symbols be read on initial access via either
946 the gdb startup command line or on a per symbol file basis. Expand
947 all partial symbol tables for this objfile if so. */
949 if ((flags & OBJF_READNOW) || readnow_symbol_files)
951 if (from_tty || info_verbose)
953 printf_filtered ("expanding to full symbols...");
955 gdb_flush (gdb_stdout);
958 for (psymtab = objfile->psymtabs;
960 psymtab = psymtab->next)
962 psymtab_to_symtab (psymtab);
966 if (from_tty || info_verbose)
968 if (post_add_symbol_hook)
969 post_add_symbol_hook ();
972 printf_filtered ("done.\n");
976 /* We print some messages regardless of whether 'from_tty ||
977 info_verbose' is true, so make sure they go out at the right
979 gdb_flush (gdb_stdout);
981 if (objfile->sf == NULL)
982 return objfile; /* No symbols. */
984 new_symfile_objfile (objfile, mainline, from_tty);
986 if (target_new_objfile_hook)
987 target_new_objfile_hook (objfile);
993 /* Process a symbol file, as either the main file or as a dynamically
994 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
997 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
998 int mainline, int flags)
1000 return symbol_file_add_with_addrs_or_offsets (name, from_tty, addrs, 0, 0,
1005 /* Call symbol_file_add() with default values and update whatever is
1006 affected by the loading of a new main().
1007 Used when the file is supplied in the gdb command line
1008 and by some targets with special loading requirements.
1009 The auxiliary function, symbol_file_add_main_1(), has the flags
1010 argument for the switches that can only be specified in the symbol_file
1014 symbol_file_add_main (char *args, int from_tty)
1016 symbol_file_add_main_1 (args, from_tty, 0);
1020 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1022 symbol_file_add (args, from_tty, NULL, 1, flags);
1025 RESET_HP_UX_GLOBALS ();
1028 /* Getting new symbols may change our opinion about
1029 what is frameless. */
1030 reinit_frame_cache ();
1032 set_initial_language ();
1036 symbol_file_clear (int from_tty)
1038 if ((have_full_symbols () || have_partial_symbols ())
1040 && !query ("Discard symbol table from `%s'? ",
1041 symfile_objfile->name))
1042 error ("Not confirmed.");
1043 free_all_objfiles ();
1045 /* solib descriptors may have handles to objfiles. Since their
1046 storage has just been released, we'd better wipe the solib
1047 descriptors as well.
1049 #if defined(SOLIB_RESTART)
1053 symfile_objfile = NULL;
1055 printf_unfiltered ("No symbol file now.\n");
1057 RESET_HP_UX_GLOBALS ();
1061 /* This is the symbol-file command. Read the file, analyze its
1062 symbols, and add a struct symtab to a symtab list. The syntax of
1063 the command is rather bizarre--(1) buildargv implements various
1064 quoting conventions which are undocumented and have little or
1065 nothing in common with the way things are quoted (or not quoted)
1066 elsewhere in GDB, (2) options are used, which are not generally
1067 used in GDB (perhaps "set mapped on", "set readnow on" would be
1068 better), (3) the order of options matters, which is contrary to GNU
1069 conventions (because it is confusing and inconvenient). */
1070 /* Note: ezannoni 2000-04-17. This function used to have support for
1071 rombug (see remote-os9k.c). It consisted of a call to target_link()
1072 (target.c) to get the address of the text segment from the target,
1073 and pass that to symbol_file_add(). This is no longer supported. */
1076 symbol_file_command (char *args, int from_tty)
1080 struct cleanup *cleanups;
1081 int flags = OBJF_USERLOADED;
1087 symbol_file_clear (from_tty);
1091 if ((argv = buildargv (args)) == NULL)
1095 cleanups = make_cleanup_freeargv (argv);
1096 while (*argv != NULL)
1098 if (STREQ (*argv, "-mapped"))
1099 flags |= OBJF_MAPPED;
1101 if (STREQ (*argv, "-readnow"))
1102 flags |= OBJF_READNOW;
1105 error ("unknown option `%s'", *argv);
1110 symbol_file_add_main_1 (name, from_tty, flags);
1117 error ("no symbol file name was specified");
1119 do_cleanups (cleanups);
1123 /* Set the initial language.
1125 A better solution would be to record the language in the psymtab when reading
1126 partial symbols, and then use it (if known) to set the language. This would
1127 be a win for formats that encode the language in an easily discoverable place,
1128 such as DWARF. For stabs, we can jump through hoops looking for specially
1129 named symbols or try to intuit the language from the specific type of stabs
1130 we find, but we can't do that until later when we read in full symbols.
1134 set_initial_language (void)
1136 struct partial_symtab *pst;
1137 enum language lang = language_unknown;
1139 pst = find_main_psymtab ();
1142 if (pst->filename != NULL)
1144 lang = deduce_language_from_filename (pst->filename);
1146 if (lang == language_unknown)
1148 /* Make C the default language */
1151 set_language (lang);
1152 expected_language = current_language; /* Don't warn the user */
1156 /* Open file specified by NAME and hand it off to BFD for preliminary
1157 analysis. Result is a newly initialized bfd *, which includes a newly
1158 malloc'd` copy of NAME (tilde-expanded and made absolute).
1159 In case of trouble, error() is called. */
1162 symfile_bfd_open (char *name)
1166 char *absolute_name;
1170 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1172 /* Look down path for it, allocate 2nd new malloc'd copy. */
1173 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1174 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1177 char *exename = alloca (strlen (name) + 5);
1178 strcat (strcpy (exename, name), ".exe");
1179 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1185 make_cleanup (xfree, name);
1186 perror_with_name (name);
1188 xfree (name); /* Free 1st new malloc'd copy */
1189 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1190 /* It'll be freed in free_objfile(). */
1192 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1196 make_cleanup (xfree, name);
1197 error ("\"%s\": can't open to read symbols: %s.", name,
1198 bfd_errmsg (bfd_get_error ()));
1200 sym_bfd->cacheable = 1;
1202 if (!bfd_check_format (sym_bfd, bfd_object))
1204 /* FIXME: should be checking for errors from bfd_close (for one thing,
1205 on error it does not free all the storage associated with the
1207 bfd_close (sym_bfd); /* This also closes desc */
1208 make_cleanup (xfree, name);
1209 error ("\"%s\": can't read symbols: %s.", name,
1210 bfd_errmsg (bfd_get_error ()));
1215 /* Return the section index for the given section name. Return -1 if
1216 the section was not found. */
1218 get_section_index (struct objfile *objfile, char *section_name)
1220 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1227 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1228 startup by the _initialize routine in each object file format reader,
1229 to register information about each format the the reader is prepared
1233 add_symtab_fns (struct sym_fns *sf)
1235 sf->next = symtab_fns;
1240 /* Initialize to read symbols from the symbol file sym_bfd. It either
1241 returns or calls error(). The result is an initialized struct sym_fns
1242 in the objfile structure, that contains cached information about the
1246 find_sym_fns (struct objfile *objfile)
1249 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1250 char *our_target = bfd_get_target (objfile->obfd);
1252 if (our_flavour == bfd_target_srec_flavour
1253 || our_flavour == bfd_target_ihex_flavour
1254 || our_flavour == bfd_target_tekhex_flavour)
1255 return; /* No symbols. */
1257 /* Special kludge for apollo. See dstread.c. */
1258 if (STREQN (our_target, "apollo", 6))
1259 our_flavour = (enum bfd_flavour) -2;
1261 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1263 if (our_flavour == sf->sym_flavour)
1269 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1270 bfd_get_target (objfile->obfd));
1273 /* This function runs the load command of our current target. */
1276 load_command (char *arg, int from_tty)
1279 arg = get_exec_file (1);
1280 target_load (arg, from_tty);
1282 /* After re-loading the executable, we don't really know which
1283 overlays are mapped any more. */
1284 overlay_cache_invalid = 1;
1287 /* This version of "load" should be usable for any target. Currently
1288 it is just used for remote targets, not inftarg.c or core files,
1289 on the theory that only in that case is it useful.
1291 Avoiding xmodem and the like seems like a win (a) because we don't have
1292 to worry about finding it, and (b) On VMS, fork() is very slow and so
1293 we don't want to run a subprocess. On the other hand, I'm not sure how
1294 performance compares. */
1296 static int download_write_size = 512;
1297 static int validate_download = 0;
1299 /* Callback service function for generic_load (bfd_map_over_sections). */
1302 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1304 bfd_size_type *sum = data;
1306 *sum += bfd_get_section_size_before_reloc (asec);
1309 /* Opaque data for load_section_callback. */
1310 struct load_section_data {
1311 unsigned long load_offset;
1312 unsigned long write_count;
1313 unsigned long data_count;
1314 bfd_size_type total_size;
1317 /* Callback service function for generic_load (bfd_map_over_sections). */
1320 load_section_callback (bfd *abfd, asection *asec, void *data)
1322 struct load_section_data *args = data;
1324 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1326 bfd_size_type size = bfd_get_section_size_before_reloc (asec);
1330 struct cleanup *old_chain;
1331 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1332 bfd_size_type block_size;
1334 const char *sect_name = bfd_get_section_name (abfd, asec);
1337 if (download_write_size > 0 && size > download_write_size)
1338 block_size = download_write_size;
1342 buffer = xmalloc (size);
1343 old_chain = make_cleanup (xfree, buffer);
1345 /* Is this really necessary? I guess it gives the user something
1346 to look at during a long download. */
1347 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1348 sect_name, paddr_nz (size), paddr_nz (lma));
1350 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1356 bfd_size_type this_transfer = size - sent;
1358 if (this_transfer >= block_size)
1359 this_transfer = block_size;
1360 len = target_write_memory_partial (lma, buffer,
1361 this_transfer, &err);
1364 if (validate_download)
1366 /* Broken memories and broken monitors manifest
1367 themselves here when bring new computers to
1368 life. This doubles already slow downloads. */
1369 /* NOTE: cagney/1999-10-18: A more efficient
1370 implementation might add a verify_memory()
1371 method to the target vector and then use
1372 that. remote.c could implement that method
1373 using the ``qCRC'' packet. */
1374 char *check = xmalloc (len);
1375 struct cleanup *verify_cleanups =
1376 make_cleanup (xfree, check);
1378 if (target_read_memory (lma, check, len) != 0)
1379 error ("Download verify read failed at 0x%s",
1381 if (memcmp (buffer, check, len) != 0)
1382 error ("Download verify compare failed at 0x%s",
1384 do_cleanups (verify_cleanups);
1386 args->data_count += len;
1389 args->write_count += 1;
1392 || (ui_load_progress_hook != NULL
1393 && ui_load_progress_hook (sect_name, sent)))
1394 error ("Canceled the download");
1396 if (show_load_progress != NULL)
1397 show_load_progress (sect_name, sent, size,
1398 args->data_count, args->total_size);
1400 while (sent < size);
1403 error ("Memory access error while loading section %s.", sect_name);
1405 do_cleanups (old_chain);
1411 generic_load (char *args, int from_tty)
1415 time_t start_time, end_time; /* Start and end times of download */
1417 struct cleanup *old_cleanups;
1419 struct load_section_data cbdata;
1422 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1423 cbdata.write_count = 0; /* Number of writes needed. */
1424 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1425 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1427 /* Parse the input argument - the user can specify a load offset as
1428 a second argument. */
1429 filename = xmalloc (strlen (args) + 1);
1430 old_cleanups = make_cleanup (xfree, filename);
1431 strcpy (filename, args);
1432 offptr = strchr (filename, ' ');
1437 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1438 if (offptr == endptr)
1439 error ("Invalid download offset:%s\n", offptr);
1443 cbdata.load_offset = 0;
1445 /* Open the file for loading. */
1446 loadfile_bfd = bfd_openr (filename, gnutarget);
1447 if (loadfile_bfd == NULL)
1449 perror_with_name (filename);
1453 /* FIXME: should be checking for errors from bfd_close (for one thing,
1454 on error it does not free all the storage associated with the
1456 make_cleanup_bfd_close (loadfile_bfd);
1458 if (!bfd_check_format (loadfile_bfd, bfd_object))
1460 error ("\"%s\" is not an object file: %s", filename,
1461 bfd_errmsg (bfd_get_error ()));
1464 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1465 (void *) &cbdata.total_size);
1467 start_time = time (NULL);
1469 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1471 end_time = time (NULL);
1473 entry = bfd_get_start_address (loadfile_bfd);
1474 ui_out_text (uiout, "Start address ");
1475 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1476 ui_out_text (uiout, ", load size ");
1477 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1478 ui_out_text (uiout, "\n");
1479 /* We were doing this in remote-mips.c, I suspect it is right
1480 for other targets too. */
1483 /* FIXME: are we supposed to call symbol_file_add or not? According to
1484 a comment from remote-mips.c (where a call to symbol_file_add was
1485 commented out), making the call confuses GDB if more than one file is
1486 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1489 print_transfer_performance (gdb_stdout, cbdata.data_count,
1490 cbdata.write_count, end_time - start_time);
1492 do_cleanups (old_cleanups);
1495 /* Report how fast the transfer went. */
1497 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1498 replaced by print_transfer_performance (with a very different
1499 function signature). */
1502 report_transfer_performance (unsigned long data_count, time_t start_time,
1505 print_transfer_performance (gdb_stdout, data_count,
1506 end_time - start_time, 0);
1510 print_transfer_performance (struct ui_file *stream,
1511 unsigned long data_count,
1512 unsigned long write_count,
1513 unsigned long time_count)
1515 ui_out_text (uiout, "Transfer rate: ");
1518 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1519 (data_count * 8) / time_count);
1520 ui_out_text (uiout, " bits/sec");
1524 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1525 ui_out_text (uiout, " bits in <1 sec");
1527 if (write_count > 0)
1529 ui_out_text (uiout, ", ");
1530 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1531 ui_out_text (uiout, " bytes/write");
1533 ui_out_text (uiout, ".\n");
1536 /* This function allows the addition of incrementally linked object files.
1537 It does not modify any state in the target, only in the debugger. */
1538 /* Note: ezannoni 2000-04-13 This function/command used to have a
1539 special case syntax for the rombug target (Rombug is the boot
1540 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1541 rombug case, the user doesn't need to supply a text address,
1542 instead a call to target_link() (in target.c) would supply the
1543 value to use. We are now discontinuing this type of ad hoc syntax. */
1547 add_symbol_file_command (char *args, int from_tty)
1549 char *filename = NULL;
1550 int flags = OBJF_USERLOADED;
1552 int expecting_option = 0;
1553 int section_index = 0;
1557 int expecting_sec_name = 0;
1558 int expecting_sec_addr = 0;
1564 } sect_opts[SECT_OFF_MAX];
1566 struct section_addr_info section_addrs;
1567 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1572 error ("add-symbol-file takes a file name and an address");
1574 /* Make a copy of the string that we can safely write into. */
1575 args = xstrdup (args);
1577 /* Ensure section_addrs is initialized */
1578 memset (§ion_addrs, 0, sizeof (section_addrs));
1580 while (*args != '\000')
1582 /* Any leading spaces? */
1583 while (isspace (*args))
1586 /* Point arg to the beginning of the argument. */
1589 /* Move args pointer over the argument. */
1590 while ((*args != '\000') && !isspace (*args))
1593 /* If there are more arguments, terminate arg and
1595 if (*args != '\000')
1598 /* Now process the argument. */
1601 /* The first argument is the file name. */
1602 filename = tilde_expand (arg);
1603 make_cleanup (xfree, filename);
1608 /* The second argument is always the text address at which
1609 to load the program. */
1610 sect_opts[section_index].name = ".text";
1611 sect_opts[section_index].value = arg;
1616 /* It's an option (starting with '-') or it's an argument
1621 if (strcmp (arg, "-mapped") == 0)
1622 flags |= OBJF_MAPPED;
1624 if (strcmp (arg, "-readnow") == 0)
1625 flags |= OBJF_READNOW;
1627 if (strcmp (arg, "-s") == 0)
1629 if (section_index >= SECT_OFF_MAX)
1630 error ("Too many sections specified.");
1631 expecting_sec_name = 1;
1632 expecting_sec_addr = 1;
1637 if (expecting_sec_name)
1639 sect_opts[section_index].name = arg;
1640 expecting_sec_name = 0;
1643 if (expecting_sec_addr)
1645 sect_opts[section_index].value = arg;
1646 expecting_sec_addr = 0;
1650 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1656 /* Print the prompt for the query below. And save the arguments into
1657 a sect_addr_info structure to be passed around to other
1658 functions. We have to split this up into separate print
1659 statements because local_hex_string returns a local static
1662 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1663 for (i = 0; i < section_index; i++)
1666 char *val = sect_opts[i].value;
1667 char *sec = sect_opts[i].name;
1669 val = sect_opts[i].value;
1670 if (val[0] == '0' && val[1] == 'x')
1671 addr = strtoul (val+2, NULL, 16);
1673 addr = strtoul (val, NULL, 10);
1675 /* Here we store the section offsets in the order they were
1676 entered on the command line. */
1677 section_addrs.other[sec_num].name = sec;
1678 section_addrs.other[sec_num].addr = addr;
1679 printf_filtered ("\t%s_addr = %s\n",
1681 local_hex_string ((unsigned long)addr));
1684 /* The object's sections are initialized when a
1685 call is made to build_objfile_section_table (objfile).
1686 This happens in reread_symbols.
1687 At this point, we don't know what file type this is,
1688 so we can't determine what section names are valid. */
1691 if (from_tty && (!query ("%s", "")))
1692 error ("Not confirmed.");
1694 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1696 /* Getting new symbols may change our opinion about what is
1698 reinit_frame_cache ();
1699 do_cleanups (my_cleanups);
1703 add_shared_symbol_files_command (char *args, int from_tty)
1705 #ifdef ADD_SHARED_SYMBOL_FILES
1706 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1708 error ("This command is not available in this configuration of GDB.");
1712 /* Re-read symbols if a symbol-file has changed. */
1714 reread_symbols (void)
1716 struct objfile *objfile;
1719 struct stat new_statbuf;
1722 /* With the addition of shared libraries, this should be modified,
1723 the load time should be saved in the partial symbol tables, since
1724 different tables may come from different source files. FIXME.
1725 This routine should then walk down each partial symbol table
1726 and see if the symbol table that it originates from has been changed */
1728 for (objfile = object_files; objfile; objfile = objfile->next)
1732 #ifdef IBM6000_TARGET
1733 /* If this object is from a shared library, then you should
1734 stat on the library name, not member name. */
1736 if (objfile->obfd->my_archive)
1737 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1740 res = stat (objfile->name, &new_statbuf);
1743 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1744 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1748 new_modtime = new_statbuf.st_mtime;
1749 if (new_modtime != objfile->mtime)
1751 struct cleanup *old_cleanups;
1752 struct section_offsets *offsets;
1754 char *obfd_filename;
1756 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1759 /* There are various functions like symbol_file_add,
1760 symfile_bfd_open, syms_from_objfile, etc., which might
1761 appear to do what we want. But they have various other
1762 effects which we *don't* want. So we just do stuff
1763 ourselves. We don't worry about mapped files (for one thing,
1764 any mapped file will be out of date). */
1766 /* If we get an error, blow away this objfile (not sure if
1767 that is the correct response for things like shared
1769 old_cleanups = make_cleanup_free_objfile (objfile);
1770 /* We need to do this whenever any symbols go away. */
1771 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1773 /* Clean up any state BFD has sitting around. We don't need
1774 to close the descriptor but BFD lacks a way of closing the
1775 BFD without closing the descriptor. */
1776 obfd_filename = bfd_get_filename (objfile->obfd);
1777 if (!bfd_close (objfile->obfd))
1778 error ("Can't close BFD for %s: %s", objfile->name,
1779 bfd_errmsg (bfd_get_error ()));
1780 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1781 if (objfile->obfd == NULL)
1782 error ("Can't open %s to read symbols.", objfile->name);
1783 /* bfd_openr sets cacheable to true, which is what we want. */
1784 if (!bfd_check_format (objfile->obfd, bfd_object))
1785 error ("Can't read symbols from %s: %s.", objfile->name,
1786 bfd_errmsg (bfd_get_error ()));
1788 /* Save the offsets, we will nuke them with the rest of the
1790 num_offsets = objfile->num_sections;
1791 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1792 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1794 /* Nuke all the state that we will re-read. Much of the following
1795 code which sets things to NULL really is necessary to tell
1796 other parts of GDB that there is nothing currently there. */
1798 /* FIXME: Do we have to free a whole linked list, or is this
1800 if (objfile->global_psymbols.list)
1801 xmfree (objfile->md, objfile->global_psymbols.list);
1802 memset (&objfile->global_psymbols, 0,
1803 sizeof (objfile->global_psymbols));
1804 if (objfile->static_psymbols.list)
1805 xmfree (objfile->md, objfile->static_psymbols.list);
1806 memset (&objfile->static_psymbols, 0,
1807 sizeof (objfile->static_psymbols));
1809 /* Free the obstacks for non-reusable objfiles */
1810 bcache_xfree (objfile->psymbol_cache);
1811 objfile->psymbol_cache = bcache_xmalloc ();
1812 bcache_xfree (objfile->macro_cache);
1813 objfile->macro_cache = bcache_xmalloc ();
1814 obstack_free (&objfile->psymbol_obstack, 0);
1815 obstack_free (&objfile->symbol_obstack, 0);
1816 obstack_free (&objfile->type_obstack, 0);
1817 objfile->sections = NULL;
1818 objfile->symtabs = NULL;
1819 objfile->psymtabs = NULL;
1820 objfile->free_psymtabs = NULL;
1821 objfile->msymbols = NULL;
1822 objfile->minimal_symbol_count = 0;
1823 memset (&objfile->msymbol_hash, 0,
1824 sizeof (objfile->msymbol_hash));
1825 memset (&objfile->msymbol_demangled_hash, 0,
1826 sizeof (objfile->msymbol_demangled_hash));
1827 objfile->fundamental_types = NULL;
1828 if (objfile->sf != NULL)
1830 (*objfile->sf->sym_finish) (objfile);
1833 /* We never make this a mapped file. */
1835 /* obstack_specify_allocation also initializes the obstack so
1837 objfile->psymbol_cache = bcache_xmalloc ();
1838 objfile->macro_cache = bcache_xmalloc ();
1839 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1841 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1843 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1845 if (build_objfile_section_table (objfile))
1847 error ("Can't find the file sections in `%s': %s",
1848 objfile->name, bfd_errmsg (bfd_get_error ()));
1851 /* We use the same section offsets as from last time. I'm not
1852 sure whether that is always correct for shared libraries. */
1853 objfile->section_offsets = (struct section_offsets *)
1854 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
1855 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
1856 objfile->num_sections = num_offsets;
1858 /* What the hell is sym_new_init for, anyway? The concept of
1859 distinguishing between the main file and additional files
1860 in this way seems rather dubious. */
1861 if (objfile == symfile_objfile)
1863 (*objfile->sf->sym_new_init) (objfile);
1865 RESET_HP_UX_GLOBALS ();
1869 (*objfile->sf->sym_init) (objfile);
1870 clear_complaints (&symfile_complaints, 1, 1);
1871 /* The "mainline" parameter is a hideous hack; I think leaving it
1872 zero is OK since dbxread.c also does what it needs to do if
1873 objfile->global_psymbols.size is 0. */
1874 (*objfile->sf->sym_read) (objfile, 0);
1875 if (!have_partial_symbols () && !have_full_symbols ())
1878 printf_filtered ("(no debugging symbols found)\n");
1881 objfile->flags |= OBJF_SYMS;
1883 /* We're done reading the symbol file; finish off complaints. */
1884 clear_complaints (&symfile_complaints, 0, 1);
1886 /* Getting new symbols may change our opinion about what is
1889 reinit_frame_cache ();
1891 /* Discard cleanups as symbol reading was successful. */
1892 discard_cleanups (old_cleanups);
1894 /* If the mtime has changed between the time we set new_modtime
1895 and now, we *want* this to be out of date, so don't call stat
1897 objfile->mtime = new_modtime;
1900 /* Call this after reading in a new symbol table to give target
1901 dependent code a crack at the new symbols. For instance, this
1902 could be used to update the values of target-specific symbols GDB
1903 needs to keep track of (such as _sigtramp, or whatever). */
1905 TARGET_SYMFILE_POSTREAD (objfile);
1911 clear_symtab_users ();
1923 static filename_language *filename_language_table;
1924 static int fl_table_size, fl_table_next;
1927 add_filename_language (char *ext, enum language lang)
1929 if (fl_table_next >= fl_table_size)
1931 fl_table_size += 10;
1932 filename_language_table =
1933 xrealloc (filename_language_table,
1934 fl_table_size * sizeof (*filename_language_table));
1937 filename_language_table[fl_table_next].ext = xstrdup (ext);
1938 filename_language_table[fl_table_next].lang = lang;
1942 static char *ext_args;
1945 set_ext_lang_command (char *args, int from_tty)
1948 char *cp = ext_args;
1951 /* First arg is filename extension, starting with '.' */
1953 error ("'%s': Filename extension must begin with '.'", ext_args);
1955 /* Find end of first arg. */
1956 while (*cp && !isspace (*cp))
1960 error ("'%s': two arguments required -- filename extension and language",
1963 /* Null-terminate first arg */
1966 /* Find beginning of second arg, which should be a source language. */
1967 while (*cp && isspace (*cp))
1971 error ("'%s': two arguments required -- filename extension and language",
1974 /* Lookup the language from among those we know. */
1975 lang = language_enum (cp);
1977 /* Now lookup the filename extension: do we already know it? */
1978 for (i = 0; i < fl_table_next; i++)
1979 if (0 == strcmp (ext_args, filename_language_table[i].ext))
1982 if (i >= fl_table_next)
1984 /* new file extension */
1985 add_filename_language (ext_args, lang);
1989 /* redefining a previously known filename extension */
1992 /* query ("Really make files of type %s '%s'?", */
1993 /* ext_args, language_str (lang)); */
1995 xfree (filename_language_table[i].ext);
1996 filename_language_table[i].ext = xstrdup (ext_args);
1997 filename_language_table[i].lang = lang;
2002 info_ext_lang_command (char *args, int from_tty)
2006 printf_filtered ("Filename extensions and the languages they represent:");
2007 printf_filtered ("\n\n");
2008 for (i = 0; i < fl_table_next; i++)
2009 printf_filtered ("\t%s\t- %s\n",
2010 filename_language_table[i].ext,
2011 language_str (filename_language_table[i].lang));
2015 init_filename_language_table (void)
2017 if (fl_table_size == 0) /* protect against repetition */
2021 filename_language_table =
2022 xmalloc (fl_table_size * sizeof (*filename_language_table));
2023 add_filename_language (".c", language_c);
2024 add_filename_language (".C", language_cplus);
2025 add_filename_language (".cc", language_cplus);
2026 add_filename_language (".cp", language_cplus);
2027 add_filename_language (".cpp", language_cplus);
2028 add_filename_language (".cxx", language_cplus);
2029 add_filename_language (".c++", language_cplus);
2030 add_filename_language (".java", language_java);
2031 add_filename_language (".class", language_java);
2032 add_filename_language (".m", language_objc);
2033 add_filename_language (".f", language_fortran);
2034 add_filename_language (".F", language_fortran);
2035 add_filename_language (".s", language_asm);
2036 add_filename_language (".S", language_asm);
2037 add_filename_language (".pas", language_pascal);
2038 add_filename_language (".p", language_pascal);
2039 add_filename_language (".pp", language_pascal);
2044 deduce_language_from_filename (char *filename)
2049 if (filename != NULL)
2050 if ((cp = strrchr (filename, '.')) != NULL)
2051 for (i = 0; i < fl_table_next; i++)
2052 if (strcmp (cp, filename_language_table[i].ext) == 0)
2053 return filename_language_table[i].lang;
2055 return language_unknown;
2060 Allocate and partly initialize a new symbol table. Return a pointer
2061 to it. error() if no space.
2063 Caller must set these fields:
2069 possibly free_named_symtabs (symtab->filename);
2073 allocate_symtab (char *filename, struct objfile *objfile)
2075 register struct symtab *symtab;
2077 symtab = (struct symtab *)
2078 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
2079 memset (symtab, 0, sizeof (*symtab));
2080 symtab->filename = obsavestring (filename, strlen (filename),
2081 &objfile->symbol_obstack);
2082 symtab->fullname = NULL;
2083 symtab->language = deduce_language_from_filename (filename);
2084 symtab->debugformat = obsavestring ("unknown", 7,
2085 &objfile->symbol_obstack);
2087 /* Hook it to the objfile it comes from */
2089 symtab->objfile = objfile;
2090 symtab->next = objfile->symtabs;
2091 objfile->symtabs = symtab;
2093 /* FIXME: This should go away. It is only defined for the Z8000,
2094 and the Z8000 definition of this macro doesn't have anything to
2095 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2096 here for convenience. */
2097 #ifdef INIT_EXTRA_SYMTAB_INFO
2098 INIT_EXTRA_SYMTAB_INFO (symtab);
2104 struct partial_symtab *
2105 allocate_psymtab (char *filename, struct objfile *objfile)
2107 struct partial_symtab *psymtab;
2109 if (objfile->free_psymtabs)
2111 psymtab = objfile->free_psymtabs;
2112 objfile->free_psymtabs = psymtab->next;
2115 psymtab = (struct partial_symtab *)
2116 obstack_alloc (&objfile->psymbol_obstack,
2117 sizeof (struct partial_symtab));
2119 memset (psymtab, 0, sizeof (struct partial_symtab));
2120 psymtab->filename = obsavestring (filename, strlen (filename),
2121 &objfile->psymbol_obstack);
2122 psymtab->symtab = NULL;
2124 /* Prepend it to the psymtab list for the objfile it belongs to.
2125 Psymtabs are searched in most recent inserted -> least recent
2128 psymtab->objfile = objfile;
2129 psymtab->next = objfile->psymtabs;
2130 objfile->psymtabs = psymtab;
2133 struct partial_symtab **prev_pst;
2134 psymtab->objfile = objfile;
2135 psymtab->next = NULL;
2136 prev_pst = &(objfile->psymtabs);
2137 while ((*prev_pst) != NULL)
2138 prev_pst = &((*prev_pst)->next);
2139 (*prev_pst) = psymtab;
2147 discard_psymtab (struct partial_symtab *pst)
2149 struct partial_symtab **prev_pst;
2152 Empty psymtabs happen as a result of header files which don't
2153 have any symbols in them. There can be a lot of them. But this
2154 check is wrong, in that a psymtab with N_SLINE entries but
2155 nothing else is not empty, but we don't realize that. Fixing
2156 that without slowing things down might be tricky. */
2158 /* First, snip it out of the psymtab chain */
2160 prev_pst = &(pst->objfile->psymtabs);
2161 while ((*prev_pst) != pst)
2162 prev_pst = &((*prev_pst)->next);
2163 (*prev_pst) = pst->next;
2165 /* Next, put it on a free list for recycling */
2167 pst->next = pst->objfile->free_psymtabs;
2168 pst->objfile->free_psymtabs = pst;
2172 /* Reset all data structures in gdb which may contain references to symbol
2176 clear_symtab_users (void)
2178 /* Someday, we should do better than this, by only blowing away
2179 the things that really need to be blown. */
2180 clear_value_history ();
2182 clear_internalvars ();
2183 breakpoint_re_set ();
2184 set_default_breakpoint (0, 0, 0, 0);
2185 clear_current_source_symtab_and_line ();
2186 clear_pc_function_cache ();
2187 if (target_new_objfile_hook)
2188 target_new_objfile_hook (NULL);
2192 clear_symtab_users_cleanup (void *ignore)
2194 clear_symtab_users ();
2197 /* clear_symtab_users_once:
2199 This function is run after symbol reading, or from a cleanup.
2200 If an old symbol table was obsoleted, the old symbol table
2201 has been blown away, but the other GDB data structures that may
2202 reference it have not yet been cleared or re-directed. (The old
2203 symtab was zapped, and the cleanup queued, in free_named_symtab()
2206 This function can be queued N times as a cleanup, or called
2207 directly; it will do all the work the first time, and then will be a
2208 no-op until the next time it is queued. This works by bumping a
2209 counter at queueing time. Much later when the cleanup is run, or at
2210 the end of symbol processing (in case the cleanup is discarded), if
2211 the queued count is greater than the "done-count", we do the work
2212 and set the done-count to the queued count. If the queued count is
2213 less than or equal to the done-count, we just ignore the call. This
2214 is needed because reading a single .o file will often replace many
2215 symtabs (one per .h file, for example), and we don't want to reset
2216 the breakpoints N times in the user's face.
2218 The reason we both queue a cleanup, and call it directly after symbol
2219 reading, is because the cleanup protects us in case of errors, but is
2220 discarded if symbol reading is successful. */
2223 /* FIXME: As free_named_symtabs is currently a big noop this function
2224 is no longer needed. */
2225 static void clear_symtab_users_once (void);
2227 static int clear_symtab_users_queued;
2228 static int clear_symtab_users_done;
2231 clear_symtab_users_once (void)
2233 /* Enforce once-per-`do_cleanups'-semantics */
2234 if (clear_symtab_users_queued <= clear_symtab_users_done)
2236 clear_symtab_users_done = clear_symtab_users_queued;
2238 clear_symtab_users ();
2242 /* Delete the specified psymtab, and any others that reference it. */
2245 cashier_psymtab (struct partial_symtab *pst)
2247 struct partial_symtab *ps, *pprev = NULL;
2250 /* Find its previous psymtab in the chain */
2251 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2260 /* Unhook it from the chain. */
2261 if (ps == pst->objfile->psymtabs)
2262 pst->objfile->psymtabs = ps->next;
2264 pprev->next = ps->next;
2266 /* FIXME, we can't conveniently deallocate the entries in the
2267 partial_symbol lists (global_psymbols/static_psymbols) that
2268 this psymtab points to. These just take up space until all
2269 the psymtabs are reclaimed. Ditto the dependencies list and
2270 filename, which are all in the psymbol_obstack. */
2272 /* We need to cashier any psymtab that has this one as a dependency... */
2274 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2276 for (i = 0; i < ps->number_of_dependencies; i++)
2278 if (ps->dependencies[i] == pst)
2280 cashier_psymtab (ps);
2281 goto again; /* Must restart, chain has been munged. */
2288 /* If a symtab or psymtab for filename NAME is found, free it along
2289 with any dependent breakpoints, displays, etc.
2290 Used when loading new versions of object modules with the "add-file"
2291 command. This is only called on the top-level symtab or psymtab's name;
2292 it is not called for subsidiary files such as .h files.
2294 Return value is 1 if we blew away the environment, 0 if not.
2295 FIXME. The return value appears to never be used.
2297 FIXME. I think this is not the best way to do this. We should
2298 work on being gentler to the environment while still cleaning up
2299 all stray pointers into the freed symtab. */
2302 free_named_symtabs (char *name)
2305 /* FIXME: With the new method of each objfile having it's own
2306 psymtab list, this function needs serious rethinking. In particular,
2307 why was it ever necessary to toss psymtabs with specific compilation
2308 unit filenames, as opposed to all psymtabs from a particular symbol
2310 Well, the answer is that some systems permit reloading of particular
2311 compilation units. We want to blow away any old info about these
2312 compilation units, regardless of which objfiles they arrived in. --gnu. */
2314 register struct symtab *s;
2315 register struct symtab *prev;
2316 register struct partial_symtab *ps;
2317 struct blockvector *bv;
2320 /* We only wack things if the symbol-reload switch is set. */
2321 if (!symbol_reloading)
2324 /* Some symbol formats have trouble providing file names... */
2325 if (name == 0 || *name == '\0')
2328 /* Look for a psymtab with the specified name. */
2331 for (ps = partial_symtab_list; ps; ps = ps->next)
2333 if (STREQ (name, ps->filename))
2335 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2336 goto again2; /* Must restart, chain has been munged */
2340 /* Look for a symtab with the specified name. */
2342 for (s = symtab_list; s; s = s->next)
2344 if (STREQ (name, s->filename))
2351 if (s == symtab_list)
2352 symtab_list = s->next;
2354 prev->next = s->next;
2356 /* For now, queue a delete for all breakpoints, displays, etc., whether
2357 or not they depend on the symtab being freed. This should be
2358 changed so that only those data structures affected are deleted. */
2360 /* But don't delete anything if the symtab is empty.
2361 This test is necessary due to a bug in "dbxread.c" that
2362 causes empty symtabs to be created for N_SO symbols that
2363 contain the pathname of the object file. (This problem
2364 has been fixed in GDB 3.9x). */
2366 bv = BLOCKVECTOR (s);
2367 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2368 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2369 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2371 complaint (&symfile_complaints, "Replacing old symbols for `%s'",
2373 clear_symtab_users_queued++;
2374 make_cleanup (clear_symtab_users_once, 0);
2379 complaint (&symfile_complaints, "Empty symbol table found for `%s'",
2387 /* It is still possible that some breakpoints will be affected
2388 even though no symtab was found, since the file might have
2389 been compiled without debugging, and hence not be associated
2390 with a symtab. In order to handle this correctly, we would need
2391 to keep a list of text address ranges for undebuggable files.
2392 For now, we do nothing, since this is a fairly obscure case. */
2396 /* FIXME, what about the minimal symbol table? */
2403 /* Allocate and partially fill a partial symtab. It will be
2404 completely filled at the end of the symbol list.
2406 FILENAME is the name of the symbol-file we are reading from. */
2408 struct partial_symtab *
2409 start_psymtab_common (struct objfile *objfile,
2410 struct section_offsets *section_offsets, char *filename,
2411 CORE_ADDR textlow, struct partial_symbol **global_syms,
2412 struct partial_symbol **static_syms)
2414 struct partial_symtab *psymtab;
2416 psymtab = allocate_psymtab (filename, objfile);
2417 psymtab->section_offsets = section_offsets;
2418 psymtab->textlow = textlow;
2419 psymtab->texthigh = psymtab->textlow; /* default */
2420 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2421 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2425 /* Add a symbol with a long value to a psymtab.
2426 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2429 add_psymbol_to_list (char *name, int namelength, namespace_enum namespace,
2430 enum address_class class,
2431 struct psymbol_allocation_list *list, long val, /* Value as a long */
2432 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2433 enum language language, struct objfile *objfile)
2435 register struct partial_symbol *psym;
2436 char *buf = alloca (namelength + 1);
2437 /* psymbol is static so that there will be no uninitialized gaps in the
2438 structure which might contain random data, causing cache misses in
2440 static struct partial_symbol psymbol;
2442 /* Create local copy of the partial symbol */
2443 memcpy (buf, name, namelength);
2444 buf[namelength] = '\0';
2445 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2446 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2449 SYMBOL_VALUE (&psymbol) = val;
2453 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2455 SYMBOL_SECTION (&psymbol) = 0;
2456 SYMBOL_LANGUAGE (&psymbol) = language;
2457 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2458 PSYMBOL_CLASS (&psymbol) = class;
2459 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2461 /* Stash the partial symbol away in the cache */
2462 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2464 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2465 if (list->next >= list->list + list->size)
2467 extend_psymbol_list (list, objfile);
2469 *list->next++ = psym;
2470 OBJSTAT (objfile, n_psyms++);
2473 /* Add a symbol with a long value to a psymtab. This differs from
2474 * add_psymbol_to_list above in taking both a mangled and a demangled
2478 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2479 int dem_namelength, namespace_enum namespace,
2480 enum address_class class,
2481 struct psymbol_allocation_list *list, long val, /* Value as a long */
2482 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2483 enum language language,
2484 struct objfile *objfile)
2486 register struct partial_symbol *psym;
2487 char *buf = alloca (namelength + 1);
2488 /* psymbol is static so that there will be no uninitialized gaps in the
2489 structure which might contain random data, causing cache misses in
2491 static struct partial_symbol psymbol;
2493 /* Create local copy of the partial symbol */
2495 memcpy (buf, name, namelength);
2496 buf[namelength] = '\0';
2497 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2499 buf = alloca (dem_namelength + 1);
2500 memcpy (buf, dem_name, dem_namelength);
2501 buf[dem_namelength] = '\0';
2506 case language_cplus:
2507 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2508 bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2510 /* FIXME What should be done for the default case? Ignoring for now. */
2513 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2516 SYMBOL_VALUE (&psymbol) = val;
2520 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2522 SYMBOL_SECTION (&psymbol) = 0;
2523 SYMBOL_LANGUAGE (&psymbol) = language;
2524 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2525 PSYMBOL_CLASS (&psymbol) = class;
2526 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2528 /* Stash the partial symbol away in the cache */
2529 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2531 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2532 if (list->next >= list->list + list->size)
2534 extend_psymbol_list (list, objfile);
2536 *list->next++ = psym;
2537 OBJSTAT (objfile, n_psyms++);
2540 /* Initialize storage for partial symbols. */
2543 init_psymbol_list (struct objfile *objfile, int total_symbols)
2545 /* Free any previously allocated psymbol lists. */
2547 if (objfile->global_psymbols.list)
2549 xmfree (objfile->md, objfile->global_psymbols.list);
2551 if (objfile->static_psymbols.list)
2553 xmfree (objfile->md, objfile->static_psymbols.list);
2556 /* Current best guess is that approximately a twentieth
2557 of the total symbols (in a debugging file) are global or static
2560 objfile->global_psymbols.size = total_symbols / 10;
2561 objfile->static_psymbols.size = total_symbols / 10;
2563 if (objfile->global_psymbols.size > 0)
2565 objfile->global_psymbols.next =
2566 objfile->global_psymbols.list = (struct partial_symbol **)
2567 xmmalloc (objfile->md, (objfile->global_psymbols.size
2568 * sizeof (struct partial_symbol *)));
2570 if (objfile->static_psymbols.size > 0)
2572 objfile->static_psymbols.next =
2573 objfile->static_psymbols.list = (struct partial_symbol **)
2574 xmmalloc (objfile->md, (objfile->static_psymbols.size
2575 * sizeof (struct partial_symbol *)));
2580 The following code implements an abstraction for debugging overlay sections.
2582 The target model is as follows:
2583 1) The gnu linker will permit multiple sections to be mapped into the
2584 same VMA, each with its own unique LMA (or load address).
2585 2) It is assumed that some runtime mechanism exists for mapping the
2586 sections, one by one, from the load address into the VMA address.
2587 3) This code provides a mechanism for gdb to keep track of which
2588 sections should be considered to be mapped from the VMA to the LMA.
2589 This information is used for symbol lookup, and memory read/write.
2590 For instance, if a section has been mapped then its contents
2591 should be read from the VMA, otherwise from the LMA.
2593 Two levels of debugger support for overlays are available. One is
2594 "manual", in which the debugger relies on the user to tell it which
2595 overlays are currently mapped. This level of support is
2596 implemented entirely in the core debugger, and the information about
2597 whether a section is mapped is kept in the objfile->obj_section table.
2599 The second level of support is "automatic", and is only available if
2600 the target-specific code provides functionality to read the target's
2601 overlay mapping table, and translate its contents for the debugger
2602 (by updating the mapped state information in the obj_section tables).
2604 The interface is as follows:
2606 overlay map <name> -- tell gdb to consider this section mapped
2607 overlay unmap <name> -- tell gdb to consider this section unmapped
2608 overlay list -- list the sections that GDB thinks are mapped
2609 overlay read-target -- get the target's state of what's mapped
2610 overlay off/manual/auto -- set overlay debugging state
2611 Functional interface:
2612 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2613 section, return that section.
2614 find_pc_overlay(pc): find any overlay section that contains
2615 the pc, either in its VMA or its LMA
2616 overlay_is_mapped(sect): true if overlay is marked as mapped
2617 section_is_overlay(sect): true if section's VMA != LMA
2618 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2619 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2620 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2621 overlay_mapped_address(...): map an address from section's LMA to VMA
2622 overlay_unmapped_address(...): map an address from section's VMA to LMA
2623 symbol_overlayed_address(...): Return a "current" address for symbol:
2624 either in VMA or LMA depending on whether
2625 the symbol's section is currently mapped
2628 /* Overlay debugging state: */
2630 enum overlay_debugging_state overlay_debugging = ovly_off;
2631 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2633 /* Target vector for refreshing overlay mapped state */
2634 static void simple_overlay_update (struct obj_section *);
2635 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2637 /* Function: section_is_overlay (SECTION)
2638 Returns true if SECTION has VMA not equal to LMA, ie.
2639 SECTION is loaded at an address different from where it will "run". */
2642 section_is_overlay (asection *section)
2644 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2646 if (overlay_debugging)
2647 if (section && section->lma != 0 &&
2648 section->vma != section->lma)
2654 /* Function: overlay_invalidate_all (void)
2655 Invalidate the mapped state of all overlay sections (mark it as stale). */
2658 overlay_invalidate_all (void)
2660 struct objfile *objfile;
2661 struct obj_section *sect;
2663 ALL_OBJSECTIONS (objfile, sect)
2664 if (section_is_overlay (sect->the_bfd_section))
2665 sect->ovly_mapped = -1;
2668 /* Function: overlay_is_mapped (SECTION)
2669 Returns true if section is an overlay, and is currently mapped.
2670 Private: public access is thru function section_is_mapped.
2672 Access to the ovly_mapped flag is restricted to this function, so
2673 that we can do automatic update. If the global flag
2674 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2675 overlay_invalidate_all. If the mapped state of the particular
2676 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2679 overlay_is_mapped (struct obj_section *osect)
2681 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2684 switch (overlay_debugging)
2688 return 0; /* overlay debugging off */
2689 case ovly_auto: /* overlay debugging automatic */
2690 /* Unles there is a target_overlay_update function,
2691 there's really nothing useful to do here (can't really go auto) */
2692 if (target_overlay_update)
2694 if (overlay_cache_invalid)
2696 overlay_invalidate_all ();
2697 overlay_cache_invalid = 0;
2699 if (osect->ovly_mapped == -1)
2700 (*target_overlay_update) (osect);
2702 /* fall thru to manual case */
2703 case ovly_on: /* overlay debugging manual */
2704 return osect->ovly_mapped == 1;
2708 /* Function: section_is_mapped
2709 Returns true if section is an overlay, and is currently mapped. */
2712 section_is_mapped (asection *section)
2714 struct objfile *objfile;
2715 struct obj_section *osect;
2717 if (overlay_debugging)
2718 if (section && section_is_overlay (section))
2719 ALL_OBJSECTIONS (objfile, osect)
2720 if (osect->the_bfd_section == section)
2721 return overlay_is_mapped (osect);
2726 /* Function: pc_in_unmapped_range
2727 If PC falls into the lma range of SECTION, return true, else false. */
2730 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2732 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2736 if (overlay_debugging)
2737 if (section && section_is_overlay (section))
2739 size = bfd_get_section_size_before_reloc (section);
2740 if (section->lma <= pc && pc < section->lma + size)
2746 /* Function: pc_in_mapped_range
2747 If PC falls into the vma range of SECTION, return true, else false. */
2750 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2752 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2756 if (overlay_debugging)
2757 if (section && section_is_overlay (section))
2759 size = bfd_get_section_size_before_reloc (section);
2760 if (section->vma <= pc && pc < section->vma + size)
2767 /* Return true if the mapped ranges of sections A and B overlap, false
2770 sections_overlap (asection *a, asection *b)
2772 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2774 CORE_ADDR a_start = a->vma;
2775 CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a);
2776 CORE_ADDR b_start = b->vma;
2777 CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b);
2779 return (a_start < b_end && b_start < a_end);
2782 /* Function: overlay_unmapped_address (PC, SECTION)
2783 Returns the address corresponding to PC in the unmapped (load) range.
2784 May be the same as PC. */
2787 overlay_unmapped_address (CORE_ADDR pc, asection *section)
2789 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2791 if (overlay_debugging)
2792 if (section && section_is_overlay (section) &&
2793 pc_in_mapped_range (pc, section))
2794 return pc + section->lma - section->vma;
2799 /* Function: overlay_mapped_address (PC, SECTION)
2800 Returns the address corresponding to PC in the mapped (runtime) range.
2801 May be the same as PC. */
2804 overlay_mapped_address (CORE_ADDR pc, asection *section)
2806 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2808 if (overlay_debugging)
2809 if (section && section_is_overlay (section) &&
2810 pc_in_unmapped_range (pc, section))
2811 return pc + section->vma - section->lma;
2817 /* Function: symbol_overlayed_address
2818 Return one of two addresses (relative to the VMA or to the LMA),
2819 depending on whether the section is mapped or not. */
2822 symbol_overlayed_address (CORE_ADDR address, asection *section)
2824 if (overlay_debugging)
2826 /* If the symbol has no section, just return its regular address. */
2829 /* If the symbol's section is not an overlay, just return its address */
2830 if (!section_is_overlay (section))
2832 /* If the symbol's section is mapped, just return its address */
2833 if (section_is_mapped (section))
2836 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2837 * then return its LOADED address rather than its vma address!!
2839 return overlay_unmapped_address (address, section);
2844 /* Function: find_pc_overlay (PC)
2845 Return the best-match overlay section for PC:
2846 If PC matches a mapped overlay section's VMA, return that section.
2847 Else if PC matches an unmapped section's VMA, return that section.
2848 Else if PC matches an unmapped section's LMA, return that section. */
2851 find_pc_overlay (CORE_ADDR pc)
2853 struct objfile *objfile;
2854 struct obj_section *osect, *best_match = NULL;
2856 if (overlay_debugging)
2857 ALL_OBJSECTIONS (objfile, osect)
2858 if (section_is_overlay (osect->the_bfd_section))
2860 if (pc_in_mapped_range (pc, osect->the_bfd_section))
2862 if (overlay_is_mapped (osect))
2863 return osect->the_bfd_section;
2867 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
2870 return best_match ? best_match->the_bfd_section : NULL;
2873 /* Function: find_pc_mapped_section (PC)
2874 If PC falls into the VMA address range of an overlay section that is
2875 currently marked as MAPPED, return that section. Else return NULL. */
2878 find_pc_mapped_section (CORE_ADDR pc)
2880 struct objfile *objfile;
2881 struct obj_section *osect;
2883 if (overlay_debugging)
2884 ALL_OBJSECTIONS (objfile, osect)
2885 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
2886 overlay_is_mapped (osect))
2887 return osect->the_bfd_section;
2892 /* Function: list_overlays_command
2893 Print a list of mapped sections and their PC ranges */
2896 list_overlays_command (char *args, int from_tty)
2899 struct objfile *objfile;
2900 struct obj_section *osect;
2902 if (overlay_debugging)
2903 ALL_OBJSECTIONS (objfile, osect)
2904 if (overlay_is_mapped (osect))
2910 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
2911 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
2912 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2913 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
2915 printf_filtered ("Section %s, loaded at ", name);
2916 print_address_numeric (lma, 1, gdb_stdout);
2917 puts_filtered (" - ");
2918 print_address_numeric (lma + size, 1, gdb_stdout);
2919 printf_filtered (", mapped at ");
2920 print_address_numeric (vma, 1, gdb_stdout);
2921 puts_filtered (" - ");
2922 print_address_numeric (vma + size, 1, gdb_stdout);
2923 puts_filtered ("\n");
2928 printf_filtered ("No sections are mapped.\n");
2931 /* Function: map_overlay_command
2932 Mark the named section as mapped (ie. residing at its VMA address). */
2935 map_overlay_command (char *args, int from_tty)
2937 struct objfile *objfile, *objfile2;
2938 struct obj_section *sec, *sec2;
2941 if (!overlay_debugging)
2943 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2944 the 'overlay manual' command.");
2946 if (args == 0 || *args == 0)
2947 error ("Argument required: name of an overlay section");
2949 /* First, find a section matching the user supplied argument */
2950 ALL_OBJSECTIONS (objfile, sec)
2951 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2953 /* Now, check to see if the section is an overlay. */
2954 bfdsec = sec->the_bfd_section;
2955 if (!section_is_overlay (bfdsec))
2956 continue; /* not an overlay section */
2958 /* Mark the overlay as "mapped" */
2959 sec->ovly_mapped = 1;
2961 /* Next, make a pass and unmap any sections that are
2962 overlapped by this new section: */
2963 ALL_OBJSECTIONS (objfile2, sec2)
2964 if (sec2->ovly_mapped
2966 && sec->the_bfd_section != sec2->the_bfd_section
2967 && sections_overlap (sec->the_bfd_section,
2968 sec2->the_bfd_section))
2971 printf_filtered ("Note: section %s unmapped by overlap\n",
2972 bfd_section_name (objfile->obfd,
2973 sec2->the_bfd_section));
2974 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
2978 error ("No overlay section called %s", args);
2981 /* Function: unmap_overlay_command
2982 Mark the overlay section as unmapped
2983 (ie. resident in its LMA address range, rather than the VMA range). */
2986 unmap_overlay_command (char *args, int from_tty)
2988 struct objfile *objfile;
2989 struct obj_section *sec;
2991 if (!overlay_debugging)
2993 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2994 the 'overlay manual' command.");
2996 if (args == 0 || *args == 0)
2997 error ("Argument required: name of an overlay section");
2999 /* First, find a section matching the user supplied argument */
3000 ALL_OBJSECTIONS (objfile, sec)
3001 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3003 if (!sec->ovly_mapped)
3004 error ("Section %s is not mapped", args);
3005 sec->ovly_mapped = 0;
3008 error ("No overlay section called %s", args);
3011 /* Function: overlay_auto_command
3012 A utility command to turn on overlay debugging.
3013 Possibly this should be done via a set/show command. */
3016 overlay_auto_command (char *args, int from_tty)
3018 overlay_debugging = ovly_auto;
3019 enable_overlay_breakpoints ();
3021 printf_filtered ("Automatic overlay debugging enabled.");
3024 /* Function: overlay_manual_command
3025 A utility command to turn on overlay debugging.
3026 Possibly this should be done via a set/show command. */
3029 overlay_manual_command (char *args, int from_tty)
3031 overlay_debugging = ovly_on;
3032 disable_overlay_breakpoints ();
3034 printf_filtered ("Overlay debugging enabled.");
3037 /* Function: overlay_off_command
3038 A utility command to turn on overlay debugging.
3039 Possibly this should be done via a set/show command. */
3042 overlay_off_command (char *args, int from_tty)
3044 overlay_debugging = ovly_off;
3045 disable_overlay_breakpoints ();
3047 printf_filtered ("Overlay debugging disabled.");
3051 overlay_load_command (char *args, int from_tty)
3053 if (target_overlay_update)
3054 (*target_overlay_update) (NULL);
3056 error ("This target does not know how to read its overlay state.");
3059 /* Function: overlay_command
3060 A place-holder for a mis-typed command */
3062 /* Command list chain containing all defined "overlay" subcommands. */
3063 struct cmd_list_element *overlaylist;
3066 overlay_command (char *args, int from_tty)
3069 ("\"overlay\" must be followed by the name of an overlay command.\n");
3070 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3074 /* Target Overlays for the "Simplest" overlay manager:
3076 This is GDB's default target overlay layer. It works with the
3077 minimal overlay manager supplied as an example by Cygnus. The
3078 entry point is via a function pointer "target_overlay_update",
3079 so targets that use a different runtime overlay manager can
3080 substitute their own overlay_update function and take over the
3083 The overlay_update function pokes around in the target's data structures
3084 to see what overlays are mapped, and updates GDB's overlay mapping with
3087 In this simple implementation, the target data structures are as follows:
3088 unsigned _novlys; /# number of overlay sections #/
3089 unsigned _ovly_table[_novlys][4] = {
3090 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3091 {..., ..., ..., ...},
3093 unsigned _novly_regions; /# number of overlay regions #/
3094 unsigned _ovly_region_table[_novly_regions][3] = {
3095 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3098 These functions will attempt to update GDB's mappedness state in the
3099 symbol section table, based on the target's mappedness state.
3101 To do this, we keep a cached copy of the target's _ovly_table, and
3102 attempt to detect when the cached copy is invalidated. The main
3103 entry point is "simple_overlay_update(SECT), which looks up SECT in
3104 the cached table and re-reads only the entry for that section from
3105 the target (whenever possible).
3108 /* Cached, dynamically allocated copies of the target data structures: */
3109 static unsigned (*cache_ovly_table)[4] = 0;
3111 static unsigned (*cache_ovly_region_table)[3] = 0;
3113 static unsigned cache_novlys = 0;
3115 static unsigned cache_novly_regions = 0;
3117 static CORE_ADDR cache_ovly_table_base = 0;
3119 static CORE_ADDR cache_ovly_region_table_base = 0;
3123 VMA, SIZE, LMA, MAPPED
3125 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3127 /* Throw away the cached copy of _ovly_table */
3129 simple_free_overlay_table (void)
3131 if (cache_ovly_table)
3132 xfree (cache_ovly_table);
3134 cache_ovly_table = NULL;
3135 cache_ovly_table_base = 0;
3139 /* Throw away the cached copy of _ovly_region_table */
3141 simple_free_overlay_region_table (void)
3143 if (cache_ovly_region_table)
3144 xfree (cache_ovly_region_table);
3145 cache_novly_regions = 0;
3146 cache_ovly_region_table = NULL;
3147 cache_ovly_region_table_base = 0;
3151 /* Read an array of ints from the target into a local buffer.
3152 Convert to host order. int LEN is number of ints */
3154 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3156 /* FIXME (alloca): Not safe if array is very large. */
3157 char *buf = alloca (len * TARGET_LONG_BYTES);
3160 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3161 for (i = 0; i < len; i++)
3162 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3166 /* Find and grab a copy of the target _ovly_table
3167 (and _novlys, which is needed for the table's size) */
3169 simple_read_overlay_table (void)
3171 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3173 simple_free_overlay_table ();
3174 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3177 error ("Error reading inferior's overlay table: "
3178 "couldn't find `_novlys' variable\n"
3179 "in inferior. Use `overlay manual' mode.");
3183 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3184 if (! ovly_table_msym)
3186 error ("Error reading inferior's overlay table: couldn't find "
3187 "`_ovly_table' array\n"
3188 "in inferior. Use `overlay manual' mode.");
3192 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3194 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3195 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3196 read_target_long_array (cache_ovly_table_base,
3197 (int *) cache_ovly_table,
3200 return 1; /* SUCCESS */
3204 /* Find and grab a copy of the target _ovly_region_table
3205 (and _novly_regions, which is needed for the table's size) */
3207 simple_read_overlay_region_table (void)
3209 struct minimal_symbol *msym;
3211 simple_free_overlay_region_table ();
3212 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3214 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3216 return 0; /* failure */
3217 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3218 if (cache_ovly_region_table != NULL)
3220 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3223 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3224 read_target_long_array (cache_ovly_region_table_base,
3225 (int *) cache_ovly_region_table,
3226 cache_novly_regions * 3);
3229 return 0; /* failure */
3232 return 0; /* failure */
3233 return 1; /* SUCCESS */
3237 /* Function: simple_overlay_update_1
3238 A helper function for simple_overlay_update. Assuming a cached copy
3239 of _ovly_table exists, look through it to find an entry whose vma,
3240 lma and size match those of OSECT. Re-read the entry and make sure
3241 it still matches OSECT (else the table may no longer be valid).
3242 Set OSECT's mapped state to match the entry. Return: 1 for
3243 success, 0 for failure. */
3246 simple_overlay_update_1 (struct obj_section *osect)
3249 bfd *obfd = osect->objfile->obfd;
3250 asection *bsect = osect->the_bfd_section;
3252 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3253 for (i = 0; i < cache_novlys; i++)
3254 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3255 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3256 /* && cache_ovly_table[i][SIZE] == size */ )
3258 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3259 (int *) cache_ovly_table[i], 4);
3260 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3261 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3262 /* && cache_ovly_table[i][SIZE] == size */ )
3264 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3267 else /* Warning! Warning! Target's ovly table has changed! */
3273 /* Function: simple_overlay_update
3274 If OSECT is NULL, then update all sections' mapped state
3275 (after re-reading the entire target _ovly_table).
3276 If OSECT is non-NULL, then try to find a matching entry in the
3277 cached ovly_table and update only OSECT's mapped state.
3278 If a cached entry can't be found or the cache isn't valid, then
3279 re-read the entire cache, and go ahead and update all sections. */
3282 simple_overlay_update (struct obj_section *osect)
3284 struct objfile *objfile;
3286 /* Were we given an osect to look up? NULL means do all of them. */
3288 /* Have we got a cached copy of the target's overlay table? */
3289 if (cache_ovly_table != NULL)
3290 /* Does its cached location match what's currently in the symtab? */
3291 if (cache_ovly_table_base ==
3292 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3293 /* Then go ahead and try to look up this single section in the cache */
3294 if (simple_overlay_update_1 (osect))
3295 /* Found it! We're done. */
3298 /* Cached table no good: need to read the entire table anew.
3299 Or else we want all the sections, in which case it's actually
3300 more efficient to read the whole table in one block anyway. */
3302 if (! simple_read_overlay_table ())
3305 /* Now may as well update all sections, even if only one was requested. */
3306 ALL_OBJSECTIONS (objfile, osect)
3307 if (section_is_overlay (osect->the_bfd_section))
3310 bfd *obfd = osect->objfile->obfd;
3311 asection *bsect = osect->the_bfd_section;
3313 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3314 for (i = 0; i < cache_novlys; i++)
3315 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3316 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3317 /* && cache_ovly_table[i][SIZE] == size */ )
3318 { /* obj_section matches i'th entry in ovly_table */
3319 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3320 break; /* finished with inner for loop: break out */
3327 _initialize_symfile (void)
3329 struct cmd_list_element *c;
3331 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3332 "Load symbol table from executable file FILE.\n\
3333 The `file' command can also load symbol tables, as well as setting the file\n\
3334 to execute.", &cmdlist);
3335 set_cmd_completer (c, filename_completer);
3337 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3338 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3339 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3340 ADDR is the starting address of the file's text.\n\
3341 The optional arguments are section-name section-address pairs and\n\
3342 should be specified if the data and bss segments are not contiguous\n\
3343 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3345 set_cmd_completer (c, filename_completer);
3347 c = add_cmd ("add-shared-symbol-files", class_files,
3348 add_shared_symbol_files_command,
3349 "Load the symbols from shared objects in the dynamic linker's link map.",
3351 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3354 c = add_cmd ("load", class_files, load_command,
3355 "Dynamically load FILE into the running program, and record its symbols\n\
3356 for access from GDB.", &cmdlist);
3357 set_cmd_completer (c, filename_completer);
3360 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3361 (char *) &symbol_reloading,
3362 "Set dynamic symbol table reloading multiple times in one run.",
3366 add_prefix_cmd ("overlay", class_support, overlay_command,
3367 "Commands for debugging overlays.", &overlaylist,
3368 "overlay ", 0, &cmdlist);
3370 add_com_alias ("ovly", "overlay", class_alias, 1);
3371 add_com_alias ("ov", "overlay", class_alias, 1);
3373 add_cmd ("map-overlay", class_support, map_overlay_command,
3374 "Assert that an overlay section is mapped.", &overlaylist);
3376 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3377 "Assert that an overlay section is unmapped.", &overlaylist);
3379 add_cmd ("list-overlays", class_support, list_overlays_command,
3380 "List mappings of overlay sections.", &overlaylist);
3382 add_cmd ("manual", class_support, overlay_manual_command,
3383 "Enable overlay debugging.", &overlaylist);
3384 add_cmd ("off", class_support, overlay_off_command,
3385 "Disable overlay debugging.", &overlaylist);
3386 add_cmd ("auto", class_support, overlay_auto_command,
3387 "Enable automatic overlay debugging.", &overlaylist);
3388 add_cmd ("load-target", class_support, overlay_load_command,
3389 "Read the overlay mapping state from the target.", &overlaylist);
3391 /* Filename extension to source language lookup table: */
3392 init_filename_language_table ();
3393 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3395 "Set mapping between filename extension and source language.\n\
3396 Usage: set extension-language .foo bar",
3398 set_cmd_cfunc (c, set_ext_lang_command);
3400 add_info ("extensions", info_ext_lang_command,
3401 "All filename extensions associated with a source language.");
3404 (add_set_cmd ("download-write-size", class_obscure,
3405 var_integer, (char *) &download_write_size,
3406 "Set the write size used when downloading a program.\n"
3407 "Only used when downloading a program onto a remote\n"
3408 "target. Specify zero, or a negative value, to disable\n"
3409 "blocked writes. The actual size of each transfer is also\n"
3410 "limited by the size of the target packet and the memory\n"