1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001 Free Software Foundation, Inc.
4 Contributed by Cygnus Support, using pieces from other GDB modules.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
33 #include "breakpoint.h"
35 #include "complaints.h"
37 #include "inferior.h" /* for write_pc */
38 #include "gdb-stabs.h"
40 #include "completer.h"
43 #include <sys/types.h>
45 #include "gdb_string.h"
56 /* Some HP-UX related globals to clear when a new "main"
57 symbol file is loaded. HP-specific. */
59 extern int hp_som_som_object_present;
60 extern int hp_cxx_exception_support_initialized;
61 #define RESET_HP_UX_GLOBALS() do {\
62 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
63 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
67 int (*ui_load_progress_hook) (const char *section, unsigned long num);
68 void (*show_load_progress) (const char *section,
69 unsigned long section_sent,
70 unsigned long section_size,
71 unsigned long total_sent,
72 unsigned long total_size);
73 void (*pre_add_symbol_hook) (char *);
74 void (*post_add_symbol_hook) (void);
75 void (*target_new_objfile_hook) (struct objfile *);
77 static void clear_symtab_users_cleanup (void *ignore);
79 /* Global variables owned by this file */
80 int readnow_symbol_files; /* Read full symbols immediately */
82 struct complaint oldsyms_complaint =
84 "Replacing old symbols for `%s'", 0, 0
87 struct complaint empty_symtab_complaint =
89 "Empty symbol table found for `%s'", 0, 0
92 struct complaint unknown_option_complaint =
94 "Unknown option `%s' ignored", 0, 0
97 /* External variables and functions referenced. */
99 extern int info_verbose;
101 extern void report_transfer_performance (unsigned long, time_t, time_t);
103 /* Functions this file defines */
106 static int simple_read_overlay_region_table (void);
107 static void simple_free_overlay_region_table (void);
110 static void set_initial_language (void);
112 static void load_command (char *, int);
114 static void add_symbol_file_command (char *, int);
116 static void add_shared_symbol_files_command (char *, int);
118 static void cashier_psymtab (struct partial_symtab *);
120 static int compare_psymbols (const void *, const void *);
122 static int compare_symbols (const void *, const void *);
124 bfd *symfile_bfd_open (char *);
126 static void find_sym_fns (struct objfile *);
128 static void decrement_reading_symtab (void *);
130 static void overlay_invalidate_all (void);
132 static int overlay_is_mapped (struct obj_section *);
134 void list_overlays_command (char *, int);
136 void map_overlay_command (char *, int);
138 void unmap_overlay_command (char *, int);
140 static void overlay_auto_command (char *, int);
142 static void overlay_manual_command (char *, int);
144 static void overlay_off_command (char *, int);
146 static void overlay_load_command (char *, int);
148 static void overlay_command (char *, int);
150 static void simple_free_overlay_table (void);
152 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
154 static int simple_read_overlay_table (void);
156 static int simple_overlay_update_1 (struct obj_section *);
158 static void add_filename_language (char *ext, enum language lang);
160 static void set_ext_lang_command (char *args, int from_tty);
162 static void info_ext_lang_command (char *args, int from_tty);
164 static void init_filename_language_table (void);
166 void _initialize_symfile (void);
168 /* List of all available sym_fns. On gdb startup, each object file reader
169 calls add_symtab_fns() to register information on each format it is
172 static struct sym_fns *symtab_fns = NULL;
174 /* Flag for whether user will be reloading symbols multiple times.
175 Defaults to ON for VxWorks, otherwise OFF. */
177 #ifdef SYMBOL_RELOADING_DEFAULT
178 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
180 int symbol_reloading = 0;
183 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
184 this variable is interpreted as a threshhold. If adding a new
185 library's symbol table to those already known to the debugger would
186 exceed this threshhold, then the shlib's symbols are not added.
188 If non-zero on other platforms, shared library symbols will be added
189 automatically when the inferior is created, new libraries are loaded,
190 or when attaching to the inferior. This is almost always what users
191 will want to have happen; but for very large programs, the startup
192 time will be excessive, and so if this is a problem, the user can
193 clear this flag and then add the shared library symbols as needed.
194 Note that there is a potential for confusion, since if the shared
195 library symbols are not loaded, commands like "info fun" will *not*
196 report all the functions that are actually present.
198 Note that HP-UX interprets this variable to mean, "threshhold size
199 in megabytes, where zero means never add". Other platforms interpret
200 this variable to mean, "always add if non-zero, never add if zero."
203 int auto_solib_add = 1;
206 /* Since this function is called from within qsort, in an ANSI environment
207 it must conform to the prototype for qsort, which specifies that the
208 comparison function takes two "void *" pointers. */
211 compare_symbols (const PTR s1p, const PTR s2p)
213 register struct symbol **s1, **s2;
215 s1 = (struct symbol **) s1p;
216 s2 = (struct symbol **) s2p;
217 return (strcmp (SYMBOL_SOURCE_NAME (*s1), SYMBOL_SOURCE_NAME (*s2)));
224 compare_psymbols -- compare two partial symbols by name
228 Given pointers to pointers to two partial symbol table entries,
229 compare them by name and return -N, 0, or +N (ala strcmp).
230 Typically used by sorting routines like qsort().
234 Does direct compare of first two characters before punting
235 and passing to strcmp for longer compares. Note that the
236 original version had a bug whereby two null strings or two
237 identically named one character strings would return the
238 comparison of memory following the null byte.
243 compare_psymbols (const PTR s1p, const PTR s2p)
245 register struct partial_symbol **s1, **s2;
246 register char *st1, *st2;
248 s1 = (struct partial_symbol **) s1p;
249 s2 = (struct partial_symbol **) s2p;
250 st1 = SYMBOL_SOURCE_NAME (*s1);
251 st2 = SYMBOL_SOURCE_NAME (*s2);
254 if ((st1[0] - st2[0]) || !st1[0])
256 return (st1[0] - st2[0]);
258 else if ((st1[1] - st2[1]) || !st1[1])
260 return (st1[1] - st2[1]);
264 return (strcmp (st1, st2));
269 sort_pst_symbols (struct partial_symtab *pst)
271 /* Sort the global list; don't sort the static list */
273 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
274 pst->n_global_syms, sizeof (struct partial_symbol *),
278 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
281 sort_block_syms (register struct block *b)
283 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
284 sizeof (struct symbol *), compare_symbols);
287 /* Call sort_symtab_syms to sort alphabetically
288 the symbols of each block of one symtab. */
291 sort_symtab_syms (register struct symtab *s)
293 register struct blockvector *bv;
296 register struct block *b;
300 bv = BLOCKVECTOR (s);
301 nbl = BLOCKVECTOR_NBLOCKS (bv);
302 for (i = 0; i < nbl; i++)
304 b = BLOCKVECTOR_BLOCK (bv, i);
305 if (BLOCK_SHOULD_SORT (b))
310 /* Make a null terminated copy of the string at PTR with SIZE characters in
311 the obstack pointed to by OBSTACKP . Returns the address of the copy.
312 Note that the string at PTR does not have to be null terminated, I.E. it
313 may be part of a larger string and we are only saving a substring. */
316 obsavestring (char *ptr, int size, struct obstack *obstackp)
318 register char *p = (char *) obstack_alloc (obstackp, size + 1);
319 /* Open-coded memcpy--saves function call time. These strings are usually
320 short. FIXME: Is this really still true with a compiler that can
323 register char *p1 = ptr;
324 register char *p2 = p;
325 char *end = ptr + size;
333 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
334 in the obstack pointed to by OBSTACKP. */
337 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
340 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
341 register char *val = (char *) obstack_alloc (obstackp, len);
348 /* True if we are nested inside psymtab_to_symtab. */
350 int currently_reading_symtab = 0;
353 decrement_reading_symtab (void *dummy)
355 currently_reading_symtab--;
358 /* Get the symbol table that corresponds to a partial_symtab.
359 This is fast after the first time you do it. In fact, there
360 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
364 psymtab_to_symtab (register struct partial_symtab *pst)
366 /* If it's been looked up before, return it. */
370 /* If it has not yet been read in, read it. */
373 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
374 currently_reading_symtab++;
375 (*pst->read_symtab) (pst);
376 do_cleanups (back_to);
382 /* Initialize entry point information for this objfile. */
385 init_entry_point_info (struct objfile *objfile)
387 /* Save startup file's range of PC addresses to help blockframe.c
388 decide where the bottom of the stack is. */
390 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
392 /* Executable file -- record its entry point so we'll recognize
393 the startup file because it contains the entry point. */
394 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
398 /* Examination of non-executable.o files. Short-circuit this stuff. */
399 objfile->ei.entry_point = INVALID_ENTRY_POINT;
401 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
402 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
403 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
404 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
405 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
406 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
409 /* Get current entry point address. */
412 entry_point_address (void)
414 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
417 /* Remember the lowest-addressed loadable section we've seen.
418 This function is called via bfd_map_over_sections.
420 In case of equal vmas, the section with the largest size becomes the
421 lowest-addressed loadable section.
423 If the vmas and sizes are equal, the last section is considered the
424 lowest-addressed loadable section. */
427 find_lowest_section (bfd *abfd, asection *sect, PTR obj)
429 asection **lowest = (asection **) obj;
431 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
434 *lowest = sect; /* First loadable section */
435 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
436 *lowest = sect; /* A lower loadable section */
437 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
438 && (bfd_section_size (abfd, (*lowest))
439 <= bfd_section_size (abfd, sect)))
444 /* Build (allocate and populate) a section_addr_info struct from
445 an existing section table. */
447 extern struct section_addr_info *
448 build_section_addr_info_from_section_table (const struct section_table *start,
449 const struct section_table *end)
451 struct section_addr_info *sap;
452 const struct section_table *stp;
455 sap = xmalloc (sizeof (struct section_addr_info));
456 memset (sap, 0, sizeof (struct section_addr_info));
458 for (stp = start, oidx = 0; stp != end; stp++)
460 if (stp->the_bfd_section->flags & (SEC_ALLOC | SEC_LOAD)
461 && oidx < MAX_SECTIONS)
463 sap->other[oidx].addr = stp->addr;
464 sap->other[oidx].name = xstrdup (stp->the_bfd_section->name);
465 sap->other[oidx].sectindex = stp->the_bfd_section->index;
474 /* Free all memory allocated by build_section_addr_info_from_section_table. */
477 free_section_addr_info (struct section_addr_info *sap)
481 for (idx = 0; idx < MAX_SECTIONS; idx++)
482 if (sap->other[idx].name)
483 xfree (sap->other[idx].name);
488 /* Parse the user's idea of an offset for dynamic linking, into our idea
489 of how to represent it for fast symbol reading. This is the default
490 version of the sym_fns.sym_offsets function for symbol readers that
491 don't need to do anything special. It allocates a section_offsets table
492 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
495 default_symfile_offsets (struct objfile *objfile,
496 struct section_addr_info *addrs)
499 asection *sect = NULL;
501 objfile->num_sections = SECT_OFF_MAX;
502 objfile->section_offsets = (struct section_offsets *)
503 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
504 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
506 /* Now calculate offsets for section that were specified by the
508 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
510 struct other_sections *osp ;
512 osp = &addrs->other[i] ;
516 /* Record all sections in offsets */
517 /* The section_offsets in the objfile are here filled in using
519 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
522 /* Remember the bfd indexes for the .text, .data, .bss and
525 sect = bfd_get_section_by_name (objfile->obfd, ".text");
527 objfile->sect_index_text = sect->index;
529 sect = bfd_get_section_by_name (objfile->obfd, ".data");
531 objfile->sect_index_data = sect->index;
533 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
535 objfile->sect_index_bss = sect->index;
537 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
539 objfile->sect_index_rodata = sect->index;
543 /* Process a symbol file, as either the main file or as a dynamically
546 OBJFILE is where the symbols are to be read from.
548 ADDR is the address where the text segment was loaded, unless the
549 objfile is the main symbol file, in which case it is zero.
551 MAINLINE is nonzero if this is the main symbol file, or zero if
552 it's an extra symbol file such as dynamically loaded code.
554 VERBO is nonzero if the caller has printed a verbose message about
555 the symbol reading (and complaints can be more terse about it). */
558 syms_from_objfile (struct objfile *objfile, struct section_addr_info *addrs,
559 int mainline, int verbo)
561 asection *lower_sect;
563 CORE_ADDR lower_offset;
564 struct section_addr_info local_addr;
565 struct cleanup *old_chain;
568 /* If ADDRS is NULL, initialize the local section_addr_info struct and
569 point ADDRS to it. We now establish the convention that an addr of
570 zero means no load address was specified. */
574 memset (&local_addr, 0, sizeof (local_addr));
578 init_entry_point_info (objfile);
579 find_sym_fns (objfile);
581 /* Make sure that partially constructed symbol tables will be cleaned up
582 if an error occurs during symbol reading. */
583 old_chain = make_cleanup_free_objfile (objfile);
587 /* We will modify the main symbol table, make sure that all its users
588 will be cleaned up if an error occurs during symbol reading. */
589 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
591 /* Since no error yet, throw away the old symbol table. */
593 if (symfile_objfile != NULL)
595 free_objfile (symfile_objfile);
596 symfile_objfile = NULL;
599 /* Currently we keep symbols from the add-symbol-file command.
600 If the user wants to get rid of them, they should do "symbol-file"
601 without arguments first. Not sure this is the best behavior
604 (*objfile->sf->sym_new_init) (objfile);
607 /* Convert addr into an offset rather than an absolute address.
608 We find the lowest address of a loaded segment in the objfile,
609 and assume that <addr> is where that got loaded.
611 We no longer warn if the lowest section is not a text segment (as
612 happens for the PA64 port. */
615 /* Find lowest loadable section to be used as starting point for
616 continguous sections. FIXME!! won't work without call to find
617 .text first, but this assumes text is lowest section. */
618 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
619 if (lower_sect == NULL)
620 bfd_map_over_sections (objfile->obfd, find_lowest_section,
622 if (lower_sect == NULL)
623 warning ("no loadable sections found in added symbol-file %s",
626 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
627 warning ("Lowest section in %s is %s at %s",
629 bfd_section_name (objfile->obfd, lower_sect),
630 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
631 if (lower_sect != NULL)
632 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
636 /* Calculate offsets for the loadable sections.
637 FIXME! Sections must be in order of increasing loadable section
638 so that contiguous sections can use the lower-offset!!!
640 Adjust offsets if the segments are not contiguous.
641 If the section is contiguous, its offset should be set to
642 the offset of the highest loadable section lower than it
643 (the loadable section directly below it in memory).
644 this_offset = lower_offset = lower_addr - lower_orig_addr */
646 /* Calculate offsets for sections. */
647 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
649 if (addrs->other[i].addr != 0)
651 sect = bfd_get_section_by_name (objfile->obfd, addrs->other[i].name);
654 addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect);
655 lower_offset = addrs->other[i].addr;
656 /* This is the index used by BFD. */
657 addrs->other[i].sectindex = sect->index ;
661 warning ("section %s not found in %s", addrs->other[i].name,
663 addrs->other[i].addr = 0;
667 addrs->other[i].addr = lower_offset;
671 /* Initialize symbol reading routines for this objfile, allow complaints to
672 appear for this new file, and record how verbose to be, then do the
673 initial symbol reading for this file. */
675 (*objfile->sf->sym_init) (objfile);
676 clear_complaints (1, verbo);
678 (*objfile->sf->sym_offsets) (objfile, addrs);
680 #ifndef IBM6000_TARGET
681 /* This is a SVR4/SunOS specific hack, I think. In any event, it
682 screws RS/6000. sym_offsets should be doing this sort of thing,
683 because it knows the mapping between bfd sections and
685 /* This is a hack. As far as I can tell, section offsets are not
686 target dependent. They are all set to addr with a couple of
687 exceptions. The exceptions are sysvr4 shared libraries, whose
688 offsets are kept in solib structures anyway and rs6000 xcoff
689 which handles shared libraries in a completely unique way.
691 Section offsets are built similarly, except that they are built
692 by adding addr in all cases because there is no clear mapping
693 from section_offsets into actual sections. Note that solib.c
694 has a different algorithm for finding section offsets.
696 These should probably all be collapsed into some target
697 independent form of shared library support. FIXME. */
701 struct obj_section *s;
703 /* Map section offsets in "addr" back to the object's
704 sections by comparing the section names with bfd's
705 section names. Then adjust the section address by
706 the offset. */ /* for gdb/13815 */
708 ALL_OBJFILE_OSECTIONS (objfile, s)
710 CORE_ADDR s_addr = 0;
714 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
716 if (strcmp (s->the_bfd_section->name, addrs->other[i].name) == 0)
717 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
719 s->addr -= s->offset;
721 s->endaddr -= s->offset;
722 s->endaddr += s_addr;
726 #endif /* not IBM6000_TARGET */
728 (*objfile->sf->sym_read) (objfile, mainline);
730 if (!have_partial_symbols () && !have_full_symbols ())
733 printf_filtered ("(no debugging symbols found)...");
737 /* Don't allow char * to have a typename (else would get caddr_t).
738 Ditto void *. FIXME: Check whether this is now done by all the
739 symbol readers themselves (many of them now do), and if so remove
742 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
743 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
745 /* Mark the objfile has having had initial symbol read attempted. Note
746 that this does not mean we found any symbols... */
748 objfile->flags |= OBJF_SYMS;
750 /* Discard cleanups as symbol reading was successful. */
752 discard_cleanups (old_chain);
754 /* Call this after reading in a new symbol table to give target
755 dependent code a crack at the new symbols. For instance, this
756 could be used to update the values of target-specific symbols GDB
757 needs to keep track of (such as _sigtramp, or whatever). */
759 TARGET_SYMFILE_POSTREAD (objfile);
762 /* Perform required actions after either reading in the initial
763 symbols for a new objfile, or mapping in the symbols from a reusable
767 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
770 /* If this is the main symbol file we have to clean up all users of the
771 old main symbol file. Otherwise it is sufficient to fixup all the
772 breakpoints that may have been redefined by this symbol file. */
775 /* OK, make it the "real" symbol file. */
776 symfile_objfile = objfile;
778 clear_symtab_users ();
782 breakpoint_re_set ();
785 /* We're done reading the symbol file; finish off complaints. */
786 clear_complaints (0, verbo);
789 /* Process a symbol file, as either the main file or as a dynamically
792 NAME is the file name (which will be tilde-expanded and made
793 absolute herein) (but we don't free or modify NAME itself).
794 FROM_TTY says how verbose to be. MAINLINE specifies whether this
795 is the main symbol file, or whether it's an extra symbol file such
796 as dynamically loaded code. If !mainline, ADDR is the address
797 where the text segment was loaded.
799 Upon success, returns a pointer to the objfile that was added.
800 Upon failure, jumps back to command level (never returns). */
803 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
804 int mainline, int flags)
806 struct objfile *objfile;
807 struct partial_symtab *psymtab;
810 /* Open a bfd for the file, and give user a chance to burp if we'd be
811 interactively wiping out any existing symbols. */
813 abfd = symfile_bfd_open (name);
815 if ((have_full_symbols () || have_partial_symbols ())
818 && !query ("Load new symbol table from \"%s\"? ", name))
819 error ("Not confirmed.");
821 objfile = allocate_objfile (abfd, flags);
823 /* If the objfile uses a mapped symbol file, and we have a psymtab for
824 it, then skip reading any symbols at this time. */
826 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
828 /* We mapped in an existing symbol table file that already has had
829 initial symbol reading performed, so we can skip that part. Notify
830 the user that instead of reading the symbols, they have been mapped.
832 if (from_tty || info_verbose)
834 printf_filtered ("Mapped symbols for %s...", name);
836 gdb_flush (gdb_stdout);
838 init_entry_point_info (objfile);
839 find_sym_fns (objfile);
843 /* We either created a new mapped symbol table, mapped an existing
844 symbol table file which has not had initial symbol reading
845 performed, or need to read an unmapped symbol table. */
846 if (from_tty || info_verbose)
848 if (pre_add_symbol_hook)
849 pre_add_symbol_hook (name);
852 printf_filtered ("Reading symbols from %s...", name);
854 gdb_flush (gdb_stdout);
857 syms_from_objfile (objfile, addrs, mainline, from_tty);
860 /* We now have at least a partial symbol table. Check to see if the
861 user requested that all symbols be read on initial access via either
862 the gdb startup command line or on a per symbol file basis. Expand
863 all partial symbol tables for this objfile if so. */
865 if ((flags & OBJF_READNOW) || readnow_symbol_files)
867 if (from_tty || info_verbose)
869 printf_filtered ("expanding to full symbols...");
871 gdb_flush (gdb_stdout);
874 for (psymtab = objfile->psymtabs;
876 psymtab = psymtab->next)
878 psymtab_to_symtab (psymtab);
882 if (from_tty || info_verbose)
884 if (post_add_symbol_hook)
885 post_add_symbol_hook ();
888 printf_filtered ("done.\n");
889 gdb_flush (gdb_stdout);
893 new_symfile_objfile (objfile, mainline, from_tty);
895 if (target_new_objfile_hook)
896 target_new_objfile_hook (objfile);
901 /* Just call the above with default values.
902 Used when the file is supplied in the gdb command line. */
905 symbol_file_add_main (char *args, int from_tty)
907 symbol_file_add (args, from_tty, NULL, 1, 0);
911 symbol_file_clear (int from_tty)
913 if ((have_full_symbols () || have_partial_symbols ())
915 && !query ("Discard symbol table from `%s'? ",
916 symfile_objfile->name))
917 error ("Not confirmed.");
918 free_all_objfiles ();
920 /* solib descriptors may have handles to objfiles. Since their
921 storage has just been released, we'd better wipe the solib
924 #if defined(SOLIB_RESTART)
928 symfile_objfile = NULL;
930 printf_unfiltered ("No symbol file now.\n");
932 RESET_HP_UX_GLOBALS ();
936 /* This is the symbol-file command. Read the file, analyze its
937 symbols, and add a struct symtab to a symtab list. The syntax of
938 the command is rather bizarre--(1) buildargv implements various
939 quoting conventions which are undocumented and have little or
940 nothing in common with the way things are quoted (or not quoted)
941 elsewhere in GDB, (2) options are used, which are not generally
942 used in GDB (perhaps "set mapped on", "set readnow on" would be
943 better), (3) the order of options matters, which is contrary to GNU
944 conventions (because it is confusing and inconvenient). */
945 /* Note: ezannoni 2000-04-17. This function used to have support for
946 rombug (see remote-os9k.c). It consisted of a call to target_link()
947 (target.c) to get the address of the text segment from the target,
948 and pass that to symbol_file_add(). This is no longer supported. */
951 symbol_file_command (char *args, int from_tty)
955 struct cleanup *cleanups;
956 int flags = OBJF_USERLOADED;
962 symbol_file_clear (from_tty);
966 if ((argv = buildargv (args)) == NULL)
970 cleanups = make_cleanup_freeargv (argv);
971 while (*argv != NULL)
973 if (STREQ (*argv, "-mapped"))
974 flags |= OBJF_MAPPED;
976 if (STREQ (*argv, "-readnow"))
977 flags |= OBJF_READNOW;
980 error ("unknown option `%s'", *argv);
984 symbol_file_add (name, from_tty, NULL, 1, flags);
986 RESET_HP_UX_GLOBALS ();
988 /* Getting new symbols may change our opinion about
989 what is frameless. */
990 reinit_frame_cache ();
992 set_initial_language ();
999 error ("no symbol file name was specified");
1001 TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction));
1002 do_cleanups (cleanups);
1006 /* Set the initial language.
1008 A better solution would be to record the language in the psymtab when reading
1009 partial symbols, and then use it (if known) to set the language. This would
1010 be a win for formats that encode the language in an easily discoverable place,
1011 such as DWARF. For stabs, we can jump through hoops looking for specially
1012 named symbols or try to intuit the language from the specific type of stabs
1013 we find, but we can't do that until later when we read in full symbols.
1017 set_initial_language (void)
1019 struct partial_symtab *pst;
1020 enum language lang = language_unknown;
1022 pst = find_main_psymtab ();
1025 if (pst->filename != NULL)
1027 lang = deduce_language_from_filename (pst->filename);
1029 if (lang == language_unknown)
1031 /* Make C the default language */
1034 set_language (lang);
1035 expected_language = current_language; /* Don't warn the user */
1039 /* Open file specified by NAME and hand it off to BFD for preliminary
1040 analysis. Result is a newly initialized bfd *, which includes a newly
1041 malloc'd` copy of NAME (tilde-expanded and made absolute).
1042 In case of trouble, error() is called. */
1045 symfile_bfd_open (char *name)
1049 char *absolute_name;
1053 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1055 /* Look down path for it, allocate 2nd new malloc'd copy. */
1056 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1057 #if defined(__GO32__) || defined(_WIN32)
1060 char *exename = alloca (strlen (name) + 5);
1061 strcat (strcpy (exename, name), ".exe");
1062 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1068 make_cleanup (xfree, name);
1069 perror_with_name (name);
1071 xfree (name); /* Free 1st new malloc'd copy */
1072 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1073 /* It'll be freed in free_objfile(). */
1075 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1079 make_cleanup (xfree, name);
1080 error ("\"%s\": can't open to read symbols: %s.", name,
1081 bfd_errmsg (bfd_get_error ()));
1083 sym_bfd->cacheable = true;
1085 if (!bfd_check_format (sym_bfd, bfd_object))
1087 /* FIXME: should be checking for errors from bfd_close (for one thing,
1088 on error it does not free all the storage associated with the
1090 bfd_close (sym_bfd); /* This also closes desc */
1091 make_cleanup (xfree, name);
1092 error ("\"%s\": can't read symbols: %s.", name,
1093 bfd_errmsg (bfd_get_error ()));
1098 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1099 startup by the _initialize routine in each object file format reader,
1100 to register information about each format the the reader is prepared
1104 add_symtab_fns (struct sym_fns *sf)
1106 sf->next = symtab_fns;
1111 /* Initialize to read symbols from the symbol file sym_bfd. It either
1112 returns or calls error(). The result is an initialized struct sym_fns
1113 in the objfile structure, that contains cached information about the
1117 find_sym_fns (struct objfile *objfile)
1120 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1121 char *our_target = bfd_get_target (objfile->obfd);
1123 /* Special kludge for apollo. See dstread.c. */
1124 if (STREQN (our_target, "apollo", 6))
1125 our_flavour = (enum bfd_flavour) -2;
1127 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1129 if (our_flavour == sf->sym_flavour)
1135 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1136 bfd_get_target (objfile->obfd));
1139 /* This function runs the load command of our current target. */
1142 load_command (char *arg, int from_tty)
1145 arg = get_exec_file (1);
1146 target_load (arg, from_tty);
1149 /* This version of "load" should be usable for any target. Currently
1150 it is just used for remote targets, not inftarg.c or core files,
1151 on the theory that only in that case is it useful.
1153 Avoiding xmodem and the like seems like a win (a) because we don't have
1154 to worry about finding it, and (b) On VMS, fork() is very slow and so
1155 we don't want to run a subprocess. On the other hand, I'm not sure how
1156 performance compares. */
1158 static int download_write_size = 512;
1159 static int validate_download = 0;
1162 generic_load (char *args, int from_tty)
1166 time_t start_time, end_time; /* Start and end times of download */
1167 unsigned long data_count = 0; /* Number of bytes transferred to memory */
1168 unsigned long write_count = 0; /* Number of writes needed. */
1169 unsigned long load_offset; /* offset to add to vma for each section */
1171 struct cleanup *old_cleanups;
1173 CORE_ADDR total_size = 0;
1174 CORE_ADDR total_sent = 0;
1176 /* Parse the input argument - the user can specify a load offset as
1177 a second argument. */
1178 filename = xmalloc (strlen (args) + 1);
1179 old_cleanups = make_cleanup (xfree, filename);
1180 strcpy (filename, args);
1181 offptr = strchr (filename, ' ');
1185 load_offset = strtoul (offptr, &endptr, 0);
1186 if (offptr == endptr)
1187 error ("Invalid download offset:%s\n", offptr);
1193 /* Open the file for loading. */
1194 loadfile_bfd = bfd_openr (filename, gnutarget);
1195 if (loadfile_bfd == NULL)
1197 perror_with_name (filename);
1201 /* FIXME: should be checking for errors from bfd_close (for one thing,
1202 on error it does not free all the storage associated with the
1204 make_cleanup_bfd_close (loadfile_bfd);
1206 if (!bfd_check_format (loadfile_bfd, bfd_object))
1208 error ("\"%s\" is not an object file: %s", filename,
1209 bfd_errmsg (bfd_get_error ()));
1212 for (s = loadfile_bfd->sections; s; s = s->next)
1213 if (s->flags & SEC_LOAD)
1214 total_size += bfd_get_section_size_before_reloc (s);
1216 start_time = time (NULL);
1218 for (s = loadfile_bfd->sections; s; s = s->next)
1220 if (s->flags & SEC_LOAD)
1222 CORE_ADDR size = bfd_get_section_size_before_reloc (s);
1226 struct cleanup *old_chain;
1227 CORE_ADDR lma = s->lma + load_offset;
1228 CORE_ADDR block_size;
1230 const char *sect_name = bfd_get_section_name (loadfile_bfd, s);
1233 if (download_write_size > 0 && size > download_write_size)
1234 block_size = download_write_size;
1238 buffer = xmalloc (size);
1239 old_chain = make_cleanup (xfree, buffer);
1241 /* Is this really necessary? I guess it gives the user something
1242 to look at during a long download. */
1244 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1245 sect_name, paddr_nz (size), paddr_nz (lma));
1247 fprintf_unfiltered (gdb_stdout,
1248 "Loading section %s, size 0x%s lma 0x%s\n",
1249 sect_name, paddr_nz (size), paddr_nz (lma));
1252 bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
1258 CORE_ADDR this_transfer = size - sent;
1259 if (this_transfer >= block_size)
1260 this_transfer = block_size;
1261 len = target_write_memory_partial (lma, buffer,
1262 this_transfer, &err);
1265 if (validate_download)
1267 /* Broken memories and broken monitors manifest
1268 themselves here when bring new computers to
1269 life. This doubles already slow downloads. */
1270 /* NOTE: cagney/1999-10-18: A more efficient
1271 implementation might add a verify_memory()
1272 method to the target vector and then use
1273 that. remote.c could implement that method
1274 using the ``qCRC'' packet. */
1275 char *check = xmalloc (len);
1276 struct cleanup *verify_cleanups = make_cleanup (xfree, check);
1277 if (target_read_memory (lma, check, len) != 0)
1278 error ("Download verify read failed at 0x%s",
1280 if (memcmp (buffer, check, len) != 0)
1281 error ("Download verify compare failed at 0x%s",
1283 do_cleanups (verify_cleanups);
1292 || (ui_load_progress_hook != NULL
1293 && ui_load_progress_hook (sect_name, sent)))
1294 error ("Canceled the download");
1296 if (show_load_progress != NULL)
1297 show_load_progress (sect_name, sent, size, total_sent, total_size);
1299 while (sent < size);
1302 error ("Memory access error while loading section %s.", sect_name);
1304 do_cleanups (old_chain);
1309 end_time = time (NULL);
1312 entry = bfd_get_start_address (loadfile_bfd);
1314 ui_out_text (uiout, "Start address ");
1315 ui_out_field_fmt (uiout, "address", "0x%s" , paddr_nz (entry));
1316 ui_out_text (uiout, ", load size ");
1317 ui_out_field_fmt (uiout, "load-size", "%ld" , data_count);
1318 ui_out_text (uiout, "\n");
1321 fprintf_unfiltered (gdb_stdout,
1322 "Start address 0x%s , load size %ld\n",
1323 paddr_nz (entry), data_count);
1325 /* We were doing this in remote-mips.c, I suspect it is right
1326 for other targets too. */
1330 /* FIXME: are we supposed to call symbol_file_add or not? According to
1331 a comment from remote-mips.c (where a call to symbol_file_add was
1332 commented out), making the call confuses GDB if more than one file is
1333 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1336 print_transfer_performance (gdb_stdout, data_count, write_count,
1337 end_time - start_time);
1339 do_cleanups (old_cleanups);
1342 /* Report how fast the transfer went. */
1344 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1345 replaced by print_transfer_performance (with a very different
1346 function signature). */
1349 report_transfer_performance (unsigned long data_count, time_t start_time,
1352 print_transfer_performance (gdb_stdout, data_count, end_time - start_time, 0);
1356 print_transfer_performance (struct ui_file *stream,
1357 unsigned long data_count,
1358 unsigned long write_count,
1359 unsigned long time_count)
1362 ui_out_text (uiout, "Transfer rate: ");
1365 ui_out_field_fmt (uiout, "transfer-rate", "%ld",
1366 (data_count * 8) / time_count);
1367 ui_out_text (uiout, " bits/sec");
1371 ui_out_field_fmt (uiout, "transferred-bits", "%ld", (data_count * 8));
1372 ui_out_text (uiout, " bits in <1 sec");
1374 if (write_count > 0)
1376 ui_out_text (uiout, ", ");
1377 ui_out_field_fmt (uiout, "write-rate", "%ld", data_count / write_count);
1378 ui_out_text (uiout, " bytes/write");
1380 ui_out_text (uiout, ".\n");
1382 fprintf_unfiltered (stream, "Transfer rate: ");
1384 fprintf_unfiltered (stream, "%ld bits/sec", (data_count * 8) / time_count);
1386 fprintf_unfiltered (stream, "%ld bits in <1 sec", (data_count * 8));
1387 if (write_count > 0)
1388 fprintf_unfiltered (stream, ", %ld bytes/write", data_count / write_count);
1389 fprintf_unfiltered (stream, ".\n");
1393 /* This function allows the addition of incrementally linked object files.
1394 It does not modify any state in the target, only in the debugger. */
1395 /* Note: ezannoni 2000-04-13 This function/command used to have a
1396 special case syntax for the rombug target (Rombug is the boot
1397 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1398 rombug case, the user doesn't need to supply a text address,
1399 instead a call to target_link() (in target.c) would supply the
1400 value to use. We are now discontinuing this type of ad hoc syntax. */
1404 add_symbol_file_command (char *args, int from_tty)
1406 char *filename = NULL;
1407 int flags = OBJF_USERLOADED;
1409 int expecting_option = 0;
1410 int section_index = 0;
1414 int expecting_sec_name = 0;
1415 int expecting_sec_addr = 0;
1421 } sect_opts[SECT_OFF_MAX];
1423 struct section_addr_info section_addrs;
1424 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1429 error ("add-symbol-file takes a file name and an address");
1431 /* Make a copy of the string that we can safely write into. */
1432 args = xstrdup (args);
1434 /* Ensure section_addrs is initialized */
1435 memset (§ion_addrs, 0, sizeof (section_addrs));
1437 while (*args != '\000')
1439 /* Any leading spaces? */
1440 while (isspace (*args))
1443 /* Point arg to the beginning of the argument. */
1446 /* Move args pointer over the argument. */
1447 while ((*args != '\000') && !isspace (*args))
1450 /* If there are more arguments, terminate arg and
1452 if (*args != '\000')
1455 /* Now process the argument. */
1458 /* The first argument is the file name. */
1459 filename = tilde_expand (arg);
1460 make_cleanup (xfree, filename);
1465 /* The second argument is always the text address at which
1466 to load the program. */
1467 sect_opts[section_index].name = ".text";
1468 sect_opts[section_index].value = arg;
1473 /* It's an option (starting with '-') or it's an argument
1478 if (strcmp (arg, "-mapped") == 0)
1479 flags |= OBJF_MAPPED;
1481 if (strcmp (arg, "-readnow") == 0)
1482 flags |= OBJF_READNOW;
1484 if (strcmp (arg, "-s") == 0)
1486 if (section_index >= SECT_OFF_MAX)
1487 error ("Too many sections specified.");
1488 expecting_sec_name = 1;
1489 expecting_sec_addr = 1;
1494 if (expecting_sec_name)
1496 sect_opts[section_index].name = arg;
1497 expecting_sec_name = 0;
1500 if (expecting_sec_addr)
1502 sect_opts[section_index].value = arg;
1503 expecting_sec_addr = 0;
1507 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1513 /* Print the prompt for the query below. And save the arguments into
1514 a sect_addr_info structure to be passed around to other
1515 functions. We have to split this up into separate print
1516 statements because local_hex_string returns a local static
1519 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1520 for (i = 0; i < section_index; i++)
1523 char *val = sect_opts[i].value;
1524 char *sec = sect_opts[i].name;
1526 val = sect_opts[i].value;
1527 if (val[0] == '0' && val[1] == 'x')
1528 addr = strtoul (val+2, NULL, 16);
1530 addr = strtoul (val, NULL, 10);
1532 /* Here we store the section offsets in the order they were
1533 entered on the command line. */
1534 section_addrs.other[sec_num].name = sec;
1535 section_addrs.other[sec_num].addr = addr;
1536 printf_filtered ("\t%s_addr = %s\n",
1538 local_hex_string ((unsigned long)addr));
1541 /* The object's sections are initialized when a
1542 call is made to build_objfile_section_table (objfile).
1543 This happens in reread_symbols.
1544 At this point, we don't know what file type this is,
1545 so we can't determine what section names are valid. */
1548 if (from_tty && (!query ("%s", "")))
1549 error ("Not confirmed.");
1551 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1553 /* Getting new symbols may change our opinion about what is
1555 reinit_frame_cache ();
1556 do_cleanups (my_cleanups);
1560 add_shared_symbol_files_command (char *args, int from_tty)
1562 #ifdef ADD_SHARED_SYMBOL_FILES
1563 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1565 error ("This command is not available in this configuration of GDB.");
1569 /* Re-read symbols if a symbol-file has changed. */
1571 reread_symbols (void)
1573 struct objfile *objfile;
1576 struct stat new_statbuf;
1579 /* With the addition of shared libraries, this should be modified,
1580 the load time should be saved in the partial symbol tables, since
1581 different tables may come from different source files. FIXME.
1582 This routine should then walk down each partial symbol table
1583 and see if the symbol table that it originates from has been changed */
1585 for (objfile = object_files; objfile; objfile = objfile->next)
1589 #ifdef IBM6000_TARGET
1590 /* If this object is from a shared library, then you should
1591 stat on the library name, not member name. */
1593 if (objfile->obfd->my_archive)
1594 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1597 res = stat (objfile->name, &new_statbuf);
1600 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1601 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1605 new_modtime = new_statbuf.st_mtime;
1606 if (new_modtime != objfile->mtime)
1608 struct cleanup *old_cleanups;
1609 struct section_offsets *offsets;
1611 char *obfd_filename;
1613 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1616 /* There are various functions like symbol_file_add,
1617 symfile_bfd_open, syms_from_objfile, etc., which might
1618 appear to do what we want. But they have various other
1619 effects which we *don't* want. So we just do stuff
1620 ourselves. We don't worry about mapped files (for one thing,
1621 any mapped file will be out of date). */
1623 /* If we get an error, blow away this objfile (not sure if
1624 that is the correct response for things like shared
1626 old_cleanups = make_cleanup_free_objfile (objfile);
1627 /* We need to do this whenever any symbols go away. */
1628 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1630 /* Clean up any state BFD has sitting around. We don't need
1631 to close the descriptor but BFD lacks a way of closing the
1632 BFD without closing the descriptor. */
1633 obfd_filename = bfd_get_filename (objfile->obfd);
1634 if (!bfd_close (objfile->obfd))
1635 error ("Can't close BFD for %s: %s", objfile->name,
1636 bfd_errmsg (bfd_get_error ()));
1637 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1638 if (objfile->obfd == NULL)
1639 error ("Can't open %s to read symbols.", objfile->name);
1640 /* bfd_openr sets cacheable to true, which is what we want. */
1641 if (!bfd_check_format (objfile->obfd, bfd_object))
1642 error ("Can't read symbols from %s: %s.", objfile->name,
1643 bfd_errmsg (bfd_get_error ()));
1645 /* Save the offsets, we will nuke them with the rest of the
1647 num_offsets = objfile->num_sections;
1648 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1649 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1651 /* Nuke all the state that we will re-read. Much of the following
1652 code which sets things to NULL really is necessary to tell
1653 other parts of GDB that there is nothing currently there. */
1655 /* FIXME: Do we have to free a whole linked list, or is this
1657 if (objfile->global_psymbols.list)
1658 mfree (objfile->md, objfile->global_psymbols.list);
1659 memset (&objfile->global_psymbols, 0,
1660 sizeof (objfile->global_psymbols));
1661 if (objfile->static_psymbols.list)
1662 mfree (objfile->md, objfile->static_psymbols.list);
1663 memset (&objfile->static_psymbols, 0,
1664 sizeof (objfile->static_psymbols));
1666 /* Free the obstacks for non-reusable objfiles */
1667 free_bcache (&objfile->psymbol_cache);
1668 obstack_free (&objfile->psymbol_obstack, 0);
1669 obstack_free (&objfile->symbol_obstack, 0);
1670 obstack_free (&objfile->type_obstack, 0);
1671 objfile->sections = NULL;
1672 objfile->symtabs = NULL;
1673 objfile->psymtabs = NULL;
1674 objfile->free_psymtabs = NULL;
1675 objfile->msymbols = NULL;
1676 objfile->minimal_symbol_count = 0;
1677 memset (&objfile->msymbol_hash, 0,
1678 sizeof (objfile->msymbol_hash));
1679 memset (&objfile->msymbol_demangled_hash, 0,
1680 sizeof (objfile->msymbol_demangled_hash));
1681 objfile->fundamental_types = NULL;
1682 if (objfile->sf != NULL)
1684 (*objfile->sf->sym_finish) (objfile);
1687 /* We never make this a mapped file. */
1689 /* obstack_specify_allocation also initializes the obstack so
1691 obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
1693 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1695 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1697 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1699 if (build_objfile_section_table (objfile))
1701 error ("Can't find the file sections in `%s': %s",
1702 objfile->name, bfd_errmsg (bfd_get_error ()));
1705 /* We use the same section offsets as from last time. I'm not
1706 sure whether that is always correct for shared libraries. */
1707 objfile->section_offsets = (struct section_offsets *)
1708 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
1709 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
1710 objfile->num_sections = num_offsets;
1712 /* What the hell is sym_new_init for, anyway? The concept of
1713 distinguishing between the main file and additional files
1714 in this way seems rather dubious. */
1715 if (objfile == symfile_objfile)
1717 (*objfile->sf->sym_new_init) (objfile);
1719 RESET_HP_UX_GLOBALS ();
1723 (*objfile->sf->sym_init) (objfile);
1724 clear_complaints (1, 1);
1725 /* The "mainline" parameter is a hideous hack; I think leaving it
1726 zero is OK since dbxread.c also does what it needs to do if
1727 objfile->global_psymbols.size is 0. */
1728 (*objfile->sf->sym_read) (objfile, 0);
1729 if (!have_partial_symbols () && !have_full_symbols ())
1732 printf_filtered ("(no debugging symbols found)\n");
1735 objfile->flags |= OBJF_SYMS;
1737 /* We're done reading the symbol file; finish off complaints. */
1738 clear_complaints (0, 1);
1740 /* Getting new symbols may change our opinion about what is
1743 reinit_frame_cache ();
1745 /* Discard cleanups as symbol reading was successful. */
1746 discard_cleanups (old_cleanups);
1748 /* If the mtime has changed between the time we set new_modtime
1749 and now, we *want* this to be out of date, so don't call stat
1751 objfile->mtime = new_modtime;
1754 /* Call this after reading in a new symbol table to give target
1755 dependent code a crack at the new symbols. For instance, this
1756 could be used to update the values of target-specific symbols GDB
1757 needs to keep track of (such as _sigtramp, or whatever). */
1759 TARGET_SYMFILE_POSTREAD (objfile);
1765 clear_symtab_users ();
1777 static filename_language *filename_language_table;
1778 static int fl_table_size, fl_table_next;
1781 add_filename_language (char *ext, enum language lang)
1783 if (fl_table_next >= fl_table_size)
1785 fl_table_size += 10;
1786 filename_language_table = realloc (filename_language_table,
1790 filename_language_table[fl_table_next].ext = xstrdup (ext);
1791 filename_language_table[fl_table_next].lang = lang;
1795 static char *ext_args;
1798 set_ext_lang_command (char *args, int from_tty)
1801 char *cp = ext_args;
1804 /* First arg is filename extension, starting with '.' */
1806 error ("'%s': Filename extension must begin with '.'", ext_args);
1808 /* Find end of first arg. */
1809 while (*cp && !isspace (*cp))
1813 error ("'%s': two arguments required -- filename extension and language",
1816 /* Null-terminate first arg */
1819 /* Find beginning of second arg, which should be a source language. */
1820 while (*cp && isspace (*cp))
1824 error ("'%s': two arguments required -- filename extension and language",
1827 /* Lookup the language from among those we know. */
1828 lang = language_enum (cp);
1830 /* Now lookup the filename extension: do we already know it? */
1831 for (i = 0; i < fl_table_next; i++)
1832 if (0 == strcmp (ext_args, filename_language_table[i].ext))
1835 if (i >= fl_table_next)
1837 /* new file extension */
1838 add_filename_language (ext_args, lang);
1842 /* redefining a previously known filename extension */
1845 /* query ("Really make files of type %s '%s'?", */
1846 /* ext_args, language_str (lang)); */
1848 xfree (filename_language_table[i].ext);
1849 filename_language_table[i].ext = xstrdup (ext_args);
1850 filename_language_table[i].lang = lang;
1855 info_ext_lang_command (char *args, int from_tty)
1859 printf_filtered ("Filename extensions and the languages they represent:");
1860 printf_filtered ("\n\n");
1861 for (i = 0; i < fl_table_next; i++)
1862 printf_filtered ("\t%s\t- %s\n",
1863 filename_language_table[i].ext,
1864 language_str (filename_language_table[i].lang));
1868 init_filename_language_table (void)
1870 if (fl_table_size == 0) /* protect against repetition */
1874 filename_language_table =
1875 xmalloc (fl_table_size * sizeof (*filename_language_table));
1876 add_filename_language (".c", language_c);
1877 add_filename_language (".C", language_cplus);
1878 add_filename_language (".cc", language_cplus);
1879 add_filename_language (".cp", language_cplus);
1880 add_filename_language (".cpp", language_cplus);
1881 add_filename_language (".cxx", language_cplus);
1882 add_filename_language (".c++", language_cplus);
1883 add_filename_language (".java", language_java);
1884 add_filename_language (".class", language_java);
1885 add_filename_language (".ch", language_chill);
1886 add_filename_language (".c186", language_chill);
1887 add_filename_language (".c286", language_chill);
1888 add_filename_language (".f", language_fortran);
1889 add_filename_language (".F", language_fortran);
1890 add_filename_language (".s", language_asm);
1891 add_filename_language (".S", language_asm);
1892 add_filename_language (".pas", language_pascal);
1893 add_filename_language (".p", language_pascal);
1894 add_filename_language (".pp", language_pascal);
1899 deduce_language_from_filename (char *filename)
1904 if (filename != NULL)
1905 if ((cp = strrchr (filename, '.')) != NULL)
1906 for (i = 0; i < fl_table_next; i++)
1907 if (strcmp (cp, filename_language_table[i].ext) == 0)
1908 return filename_language_table[i].lang;
1910 return language_unknown;
1915 Allocate and partly initialize a new symbol table. Return a pointer
1916 to it. error() if no space.
1918 Caller must set these fields:
1924 possibly free_named_symtabs (symtab->filename);
1928 allocate_symtab (char *filename, struct objfile *objfile)
1930 register struct symtab *symtab;
1932 symtab = (struct symtab *)
1933 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
1934 memset (symtab, 0, sizeof (*symtab));
1935 symtab->filename = obsavestring (filename, strlen (filename),
1936 &objfile->symbol_obstack);
1937 symtab->fullname = NULL;
1938 symtab->language = deduce_language_from_filename (filename);
1939 symtab->debugformat = obsavestring ("unknown", 7,
1940 &objfile->symbol_obstack);
1942 /* Hook it to the objfile it comes from */
1944 symtab->objfile = objfile;
1945 symtab->next = objfile->symtabs;
1946 objfile->symtabs = symtab;
1948 /* FIXME: This should go away. It is only defined for the Z8000,
1949 and the Z8000 definition of this macro doesn't have anything to
1950 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1951 here for convenience. */
1952 #ifdef INIT_EXTRA_SYMTAB_INFO
1953 INIT_EXTRA_SYMTAB_INFO (symtab);
1959 struct partial_symtab *
1960 allocate_psymtab (char *filename, struct objfile *objfile)
1962 struct partial_symtab *psymtab;
1964 if (objfile->free_psymtabs)
1966 psymtab = objfile->free_psymtabs;
1967 objfile->free_psymtabs = psymtab->next;
1970 psymtab = (struct partial_symtab *)
1971 obstack_alloc (&objfile->psymbol_obstack,
1972 sizeof (struct partial_symtab));
1974 memset (psymtab, 0, sizeof (struct partial_symtab));
1975 psymtab->filename = obsavestring (filename, strlen (filename),
1976 &objfile->psymbol_obstack);
1977 psymtab->symtab = NULL;
1979 /* Prepend it to the psymtab list for the objfile it belongs to.
1980 Psymtabs are searched in most recent inserted -> least recent
1983 psymtab->objfile = objfile;
1984 psymtab->next = objfile->psymtabs;
1985 objfile->psymtabs = psymtab;
1988 struct partial_symtab **prev_pst;
1989 psymtab->objfile = objfile;
1990 psymtab->next = NULL;
1991 prev_pst = &(objfile->psymtabs);
1992 while ((*prev_pst) != NULL)
1993 prev_pst = &((*prev_pst)->next);
1994 (*prev_pst) = psymtab;
2002 discard_psymtab (struct partial_symtab *pst)
2004 struct partial_symtab **prev_pst;
2007 Empty psymtabs happen as a result of header files which don't
2008 have any symbols in them. There can be a lot of them. But this
2009 check is wrong, in that a psymtab with N_SLINE entries but
2010 nothing else is not empty, but we don't realize that. Fixing
2011 that without slowing things down might be tricky. */
2013 /* First, snip it out of the psymtab chain */
2015 prev_pst = &(pst->objfile->psymtabs);
2016 while ((*prev_pst) != pst)
2017 prev_pst = &((*prev_pst)->next);
2018 (*prev_pst) = pst->next;
2020 /* Next, put it on a free list for recycling */
2022 pst->next = pst->objfile->free_psymtabs;
2023 pst->objfile->free_psymtabs = pst;
2027 /* Reset all data structures in gdb which may contain references to symbol
2031 clear_symtab_users (void)
2033 /* Someday, we should do better than this, by only blowing away
2034 the things that really need to be blown. */
2035 clear_value_history ();
2037 clear_internalvars ();
2038 breakpoint_re_set ();
2039 set_default_breakpoint (0, 0, 0, 0);
2040 current_source_symtab = 0;
2041 current_source_line = 0;
2042 clear_pc_function_cache ();
2043 if (target_new_objfile_hook)
2044 target_new_objfile_hook (NULL);
2048 clear_symtab_users_cleanup (void *ignore)
2050 clear_symtab_users ();
2053 /* clear_symtab_users_once:
2055 This function is run after symbol reading, or from a cleanup.
2056 If an old symbol table was obsoleted, the old symbol table
2057 has been blown away, but the other GDB data structures that may
2058 reference it have not yet been cleared or re-directed. (The old
2059 symtab was zapped, and the cleanup queued, in free_named_symtab()
2062 This function can be queued N times as a cleanup, or called
2063 directly; it will do all the work the first time, and then will be a
2064 no-op until the next time it is queued. This works by bumping a
2065 counter at queueing time. Much later when the cleanup is run, or at
2066 the end of symbol processing (in case the cleanup is discarded), if
2067 the queued count is greater than the "done-count", we do the work
2068 and set the done-count to the queued count. If the queued count is
2069 less than or equal to the done-count, we just ignore the call. This
2070 is needed because reading a single .o file will often replace many
2071 symtabs (one per .h file, for example), and we don't want to reset
2072 the breakpoints N times in the user's face.
2074 The reason we both queue a cleanup, and call it directly after symbol
2075 reading, is because the cleanup protects us in case of errors, but is
2076 discarded if symbol reading is successful. */
2079 /* FIXME: As free_named_symtabs is currently a big noop this function
2080 is no longer needed. */
2081 static void clear_symtab_users_once (void);
2083 static int clear_symtab_users_queued;
2084 static int clear_symtab_users_done;
2087 clear_symtab_users_once (void)
2089 /* Enforce once-per-`do_cleanups'-semantics */
2090 if (clear_symtab_users_queued <= clear_symtab_users_done)
2092 clear_symtab_users_done = clear_symtab_users_queued;
2094 clear_symtab_users ();
2098 /* Delete the specified psymtab, and any others that reference it. */
2101 cashier_psymtab (struct partial_symtab *pst)
2103 struct partial_symtab *ps, *pprev = NULL;
2106 /* Find its previous psymtab in the chain */
2107 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2116 /* Unhook it from the chain. */
2117 if (ps == pst->objfile->psymtabs)
2118 pst->objfile->psymtabs = ps->next;
2120 pprev->next = ps->next;
2122 /* FIXME, we can't conveniently deallocate the entries in the
2123 partial_symbol lists (global_psymbols/static_psymbols) that
2124 this psymtab points to. These just take up space until all
2125 the psymtabs are reclaimed. Ditto the dependencies list and
2126 filename, which are all in the psymbol_obstack. */
2128 /* We need to cashier any psymtab that has this one as a dependency... */
2130 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2132 for (i = 0; i < ps->number_of_dependencies; i++)
2134 if (ps->dependencies[i] == pst)
2136 cashier_psymtab (ps);
2137 goto again; /* Must restart, chain has been munged. */
2144 /* If a symtab or psymtab for filename NAME is found, free it along
2145 with any dependent breakpoints, displays, etc.
2146 Used when loading new versions of object modules with the "add-file"
2147 command. This is only called on the top-level symtab or psymtab's name;
2148 it is not called for subsidiary files such as .h files.
2150 Return value is 1 if we blew away the environment, 0 if not.
2151 FIXME. The return value appears to never be used.
2153 FIXME. I think this is not the best way to do this. We should
2154 work on being gentler to the environment while still cleaning up
2155 all stray pointers into the freed symtab. */
2158 free_named_symtabs (char *name)
2161 /* FIXME: With the new method of each objfile having it's own
2162 psymtab list, this function needs serious rethinking. In particular,
2163 why was it ever necessary to toss psymtabs with specific compilation
2164 unit filenames, as opposed to all psymtabs from a particular symbol
2166 Well, the answer is that some systems permit reloading of particular
2167 compilation units. We want to blow away any old info about these
2168 compilation units, regardless of which objfiles they arrived in. --gnu. */
2170 register struct symtab *s;
2171 register struct symtab *prev;
2172 register struct partial_symtab *ps;
2173 struct blockvector *bv;
2176 /* We only wack things if the symbol-reload switch is set. */
2177 if (!symbol_reloading)
2180 /* Some symbol formats have trouble providing file names... */
2181 if (name == 0 || *name == '\0')
2184 /* Look for a psymtab with the specified name. */
2187 for (ps = partial_symtab_list; ps; ps = ps->next)
2189 if (STREQ (name, ps->filename))
2191 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2192 goto again2; /* Must restart, chain has been munged */
2196 /* Look for a symtab with the specified name. */
2198 for (s = symtab_list; s; s = s->next)
2200 if (STREQ (name, s->filename))
2207 if (s == symtab_list)
2208 symtab_list = s->next;
2210 prev->next = s->next;
2212 /* For now, queue a delete for all breakpoints, displays, etc., whether
2213 or not they depend on the symtab being freed. This should be
2214 changed so that only those data structures affected are deleted. */
2216 /* But don't delete anything if the symtab is empty.
2217 This test is necessary due to a bug in "dbxread.c" that
2218 causes empty symtabs to be created for N_SO symbols that
2219 contain the pathname of the object file. (This problem
2220 has been fixed in GDB 3.9x). */
2222 bv = BLOCKVECTOR (s);
2223 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2224 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2225 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2227 complain (&oldsyms_complaint, name);
2229 clear_symtab_users_queued++;
2230 make_cleanup (clear_symtab_users_once, 0);
2235 complain (&empty_symtab_complaint, name);
2242 /* It is still possible that some breakpoints will be affected
2243 even though no symtab was found, since the file might have
2244 been compiled without debugging, and hence not be associated
2245 with a symtab. In order to handle this correctly, we would need
2246 to keep a list of text address ranges for undebuggable files.
2247 For now, we do nothing, since this is a fairly obscure case. */
2251 /* FIXME, what about the minimal symbol table? */
2258 /* Allocate and partially fill a partial symtab. It will be
2259 completely filled at the end of the symbol list.
2261 FILENAME is the name of the symbol-file we are reading from. */
2263 struct partial_symtab *
2264 start_psymtab_common (struct objfile *objfile,
2265 struct section_offsets *section_offsets, char *filename,
2266 CORE_ADDR textlow, struct partial_symbol **global_syms,
2267 struct partial_symbol **static_syms)
2269 struct partial_symtab *psymtab;
2271 psymtab = allocate_psymtab (filename, objfile);
2272 psymtab->section_offsets = section_offsets;
2273 psymtab->textlow = textlow;
2274 psymtab->texthigh = psymtab->textlow; /* default */
2275 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2276 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2280 /* Add a symbol with a long value to a psymtab.
2281 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2284 add_psymbol_to_list (char *name, int namelength, namespace_enum namespace,
2285 enum address_class class,
2286 struct psymbol_allocation_list *list, long val, /* Value as a long */
2287 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2288 enum language language, struct objfile *objfile)
2290 register struct partial_symbol *psym;
2291 char *buf = alloca (namelength + 1);
2292 /* psymbol is static so that there will be no uninitialized gaps in the
2293 structure which might contain random data, causing cache misses in
2295 static struct partial_symbol psymbol;
2297 /* Create local copy of the partial symbol */
2298 memcpy (buf, name, namelength);
2299 buf[namelength] = '\0';
2300 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2301 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2304 SYMBOL_VALUE (&psymbol) = val;
2308 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2310 SYMBOL_SECTION (&psymbol) = 0;
2311 SYMBOL_LANGUAGE (&psymbol) = language;
2312 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2313 PSYMBOL_CLASS (&psymbol) = class;
2314 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2316 /* Stash the partial symbol away in the cache */
2317 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2319 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2320 if (list->next >= list->list + list->size)
2322 extend_psymbol_list (list, objfile);
2324 *list->next++ = psym;
2325 OBJSTAT (objfile, n_psyms++);
2328 /* Add a symbol with a long value to a psymtab. This differs from
2329 * add_psymbol_to_list above in taking both a mangled and a demangled
2333 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2334 int dem_namelength, namespace_enum namespace,
2335 enum address_class class,
2336 struct psymbol_allocation_list *list, long val, /* Value as a long */
2337 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2338 enum language language,
2339 struct objfile *objfile)
2341 register struct partial_symbol *psym;
2342 char *buf = alloca (namelength + 1);
2343 /* psymbol is static so that there will be no uninitialized gaps in the
2344 structure which might contain random data, causing cache misses in
2346 static struct partial_symbol psymbol;
2348 /* Create local copy of the partial symbol */
2350 memcpy (buf, name, namelength);
2351 buf[namelength] = '\0';
2352 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2354 buf = alloca (dem_namelength + 1);
2355 memcpy (buf, dem_name, dem_namelength);
2356 buf[dem_namelength] = '\0';
2361 case language_cplus:
2362 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2363 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2365 case language_chill:
2366 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) =
2367 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2369 /* FIXME What should be done for the default case? Ignoring for now. */
2372 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2375 SYMBOL_VALUE (&psymbol) = val;
2379 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2381 SYMBOL_SECTION (&psymbol) = 0;
2382 SYMBOL_LANGUAGE (&psymbol) = language;
2383 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2384 PSYMBOL_CLASS (&psymbol) = class;
2385 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2387 /* Stash the partial symbol away in the cache */
2388 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2390 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2391 if (list->next >= list->list + list->size)
2393 extend_psymbol_list (list, objfile);
2395 *list->next++ = psym;
2396 OBJSTAT (objfile, n_psyms++);
2399 /* Initialize storage for partial symbols. */
2402 init_psymbol_list (struct objfile *objfile, int total_symbols)
2404 /* Free any previously allocated psymbol lists. */
2406 if (objfile->global_psymbols.list)
2408 mfree (objfile->md, (PTR) objfile->global_psymbols.list);
2410 if (objfile->static_psymbols.list)
2412 mfree (objfile->md, (PTR) objfile->static_psymbols.list);
2415 /* Current best guess is that approximately a twentieth
2416 of the total symbols (in a debugging file) are global or static
2419 objfile->global_psymbols.size = total_symbols / 10;
2420 objfile->static_psymbols.size = total_symbols / 10;
2422 if (objfile->global_psymbols.size > 0)
2424 objfile->global_psymbols.next =
2425 objfile->global_psymbols.list = (struct partial_symbol **)
2426 xmmalloc (objfile->md, (objfile->global_psymbols.size
2427 * sizeof (struct partial_symbol *)));
2429 if (objfile->static_psymbols.size > 0)
2431 objfile->static_psymbols.next =
2432 objfile->static_psymbols.list = (struct partial_symbol **)
2433 xmmalloc (objfile->md, (objfile->static_psymbols.size
2434 * sizeof (struct partial_symbol *)));
2439 The following code implements an abstraction for debugging overlay sections.
2441 The target model is as follows:
2442 1) The gnu linker will permit multiple sections to be mapped into the
2443 same VMA, each with its own unique LMA (or load address).
2444 2) It is assumed that some runtime mechanism exists for mapping the
2445 sections, one by one, from the load address into the VMA address.
2446 3) This code provides a mechanism for gdb to keep track of which
2447 sections should be considered to be mapped from the VMA to the LMA.
2448 This information is used for symbol lookup, and memory read/write.
2449 For instance, if a section has been mapped then its contents
2450 should be read from the VMA, otherwise from the LMA.
2452 Two levels of debugger support for overlays are available. One is
2453 "manual", in which the debugger relies on the user to tell it which
2454 overlays are currently mapped. This level of support is
2455 implemented entirely in the core debugger, and the information about
2456 whether a section is mapped is kept in the objfile->obj_section table.
2458 The second level of support is "automatic", and is only available if
2459 the target-specific code provides functionality to read the target's
2460 overlay mapping table, and translate its contents for the debugger
2461 (by updating the mapped state information in the obj_section tables).
2463 The interface is as follows:
2465 overlay map <name> -- tell gdb to consider this section mapped
2466 overlay unmap <name> -- tell gdb to consider this section unmapped
2467 overlay list -- list the sections that GDB thinks are mapped
2468 overlay read-target -- get the target's state of what's mapped
2469 overlay off/manual/auto -- set overlay debugging state
2470 Functional interface:
2471 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2472 section, return that section.
2473 find_pc_overlay(pc): find any overlay section that contains
2474 the pc, either in its VMA or its LMA
2475 overlay_is_mapped(sect): true if overlay is marked as mapped
2476 section_is_overlay(sect): true if section's VMA != LMA
2477 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2478 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2479 overlay_mapped_address(...): map an address from section's LMA to VMA
2480 overlay_unmapped_address(...): map an address from section's VMA to LMA
2481 symbol_overlayed_address(...): Return a "current" address for symbol:
2482 either in VMA or LMA depending on whether
2483 the symbol's section is currently mapped
2486 /* Overlay debugging state: */
2488 int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
2489 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2491 /* Target vector for refreshing overlay mapped state */
2492 static void simple_overlay_update (struct obj_section *);
2493 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2495 /* Function: section_is_overlay (SECTION)
2496 Returns true if SECTION has VMA not equal to LMA, ie.
2497 SECTION is loaded at an address different from where it will "run". */
2500 section_is_overlay (asection *section)
2502 if (overlay_debugging)
2503 if (section && section->lma != 0 &&
2504 section->vma != section->lma)
2510 /* Function: overlay_invalidate_all (void)
2511 Invalidate the mapped state of all overlay sections (mark it as stale). */
2514 overlay_invalidate_all (void)
2516 struct objfile *objfile;
2517 struct obj_section *sect;
2519 ALL_OBJSECTIONS (objfile, sect)
2520 if (section_is_overlay (sect->the_bfd_section))
2521 sect->ovly_mapped = -1;
2524 /* Function: overlay_is_mapped (SECTION)
2525 Returns true if section is an overlay, and is currently mapped.
2526 Private: public access is thru function section_is_mapped.
2528 Access to the ovly_mapped flag is restricted to this function, so
2529 that we can do automatic update. If the global flag
2530 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2531 overlay_invalidate_all. If the mapped state of the particular
2532 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2535 overlay_is_mapped (struct obj_section *osect)
2537 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2540 switch (overlay_debugging)
2544 return 0; /* overlay debugging off */
2545 case -1: /* overlay debugging automatic */
2546 /* Unles there is a target_overlay_update function,
2547 there's really nothing useful to do here (can't really go auto) */
2548 if (target_overlay_update)
2550 if (overlay_cache_invalid)
2552 overlay_invalidate_all ();
2553 overlay_cache_invalid = 0;
2555 if (osect->ovly_mapped == -1)
2556 (*target_overlay_update) (osect);
2558 /* fall thru to manual case */
2559 case 1: /* overlay debugging manual */
2560 return osect->ovly_mapped == 1;
2564 /* Function: section_is_mapped
2565 Returns true if section is an overlay, and is currently mapped. */
2568 section_is_mapped (asection *section)
2570 struct objfile *objfile;
2571 struct obj_section *osect;
2573 if (overlay_debugging)
2574 if (section && section_is_overlay (section))
2575 ALL_OBJSECTIONS (objfile, osect)
2576 if (osect->the_bfd_section == section)
2577 return overlay_is_mapped (osect);
2582 /* Function: pc_in_unmapped_range
2583 If PC falls into the lma range of SECTION, return true, else false. */
2586 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2590 if (overlay_debugging)
2591 if (section && section_is_overlay (section))
2593 size = bfd_get_section_size_before_reloc (section);
2594 if (section->lma <= pc && pc < section->lma + size)
2600 /* Function: pc_in_mapped_range
2601 If PC falls into the vma range of SECTION, return true, else false. */
2604 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2608 if (overlay_debugging)
2609 if (section && section_is_overlay (section))
2611 size = bfd_get_section_size_before_reloc (section);
2612 if (section->vma <= pc && pc < section->vma + size)
2618 /* Function: overlay_unmapped_address (PC, SECTION)
2619 Returns the address corresponding to PC in the unmapped (load) range.
2620 May be the same as PC. */
2623 overlay_unmapped_address (CORE_ADDR pc, asection *section)
2625 if (overlay_debugging)
2626 if (section && section_is_overlay (section) &&
2627 pc_in_mapped_range (pc, section))
2628 return pc + section->lma - section->vma;
2633 /* Function: overlay_mapped_address (PC, SECTION)
2634 Returns the address corresponding to PC in the mapped (runtime) range.
2635 May be the same as PC. */
2638 overlay_mapped_address (CORE_ADDR pc, asection *section)
2640 if (overlay_debugging)
2641 if (section && section_is_overlay (section) &&
2642 pc_in_unmapped_range (pc, section))
2643 return pc + section->vma - section->lma;
2649 /* Function: symbol_overlayed_address
2650 Return one of two addresses (relative to the VMA or to the LMA),
2651 depending on whether the section is mapped or not. */
2654 symbol_overlayed_address (CORE_ADDR address, asection *section)
2656 if (overlay_debugging)
2658 /* If the symbol has no section, just return its regular address. */
2661 /* If the symbol's section is not an overlay, just return its address */
2662 if (!section_is_overlay (section))
2664 /* If the symbol's section is mapped, just return its address */
2665 if (section_is_mapped (section))
2668 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2669 * then return its LOADED address rather than its vma address!!
2671 return overlay_unmapped_address (address, section);
2676 /* Function: find_pc_overlay (PC)
2677 Return the best-match overlay section for PC:
2678 If PC matches a mapped overlay section's VMA, return that section.
2679 Else if PC matches an unmapped section's VMA, return that section.
2680 Else if PC matches an unmapped section's LMA, return that section. */
2683 find_pc_overlay (CORE_ADDR pc)
2685 struct objfile *objfile;
2686 struct obj_section *osect, *best_match = NULL;
2688 if (overlay_debugging)
2689 ALL_OBJSECTIONS (objfile, osect)
2690 if (section_is_overlay (osect->the_bfd_section))
2692 if (pc_in_mapped_range (pc, osect->the_bfd_section))
2694 if (overlay_is_mapped (osect))
2695 return osect->the_bfd_section;
2699 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
2702 return best_match ? best_match->the_bfd_section : NULL;
2705 /* Function: find_pc_mapped_section (PC)
2706 If PC falls into the VMA address range of an overlay section that is
2707 currently marked as MAPPED, return that section. Else return NULL. */
2710 find_pc_mapped_section (CORE_ADDR pc)
2712 struct objfile *objfile;
2713 struct obj_section *osect;
2715 if (overlay_debugging)
2716 ALL_OBJSECTIONS (objfile, osect)
2717 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
2718 overlay_is_mapped (osect))
2719 return osect->the_bfd_section;
2724 /* Function: list_overlays_command
2725 Print a list of mapped sections and their PC ranges */
2728 list_overlays_command (char *args, int from_tty)
2731 struct objfile *objfile;
2732 struct obj_section *osect;
2734 if (overlay_debugging)
2735 ALL_OBJSECTIONS (objfile, osect)
2736 if (overlay_is_mapped (osect))
2742 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
2743 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
2744 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2745 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
2747 printf_filtered ("Section %s, loaded at ", name);
2748 print_address_numeric (lma, 1, gdb_stdout);
2749 puts_filtered (" - ");
2750 print_address_numeric (lma + size, 1, gdb_stdout);
2751 printf_filtered (", mapped at ");
2752 print_address_numeric (vma, 1, gdb_stdout);
2753 puts_filtered (" - ");
2754 print_address_numeric (vma + size, 1, gdb_stdout);
2755 puts_filtered ("\n");
2760 printf_filtered ("No sections are mapped.\n");
2763 /* Function: map_overlay_command
2764 Mark the named section as mapped (ie. residing at its VMA address). */
2767 map_overlay_command (char *args, int from_tty)
2769 struct objfile *objfile, *objfile2;
2770 struct obj_section *sec, *sec2;
2773 if (!overlay_debugging)
2775 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2776 the 'overlay manual' command.");
2778 if (args == 0 || *args == 0)
2779 error ("Argument required: name of an overlay section");
2781 /* First, find a section matching the user supplied argument */
2782 ALL_OBJSECTIONS (objfile, sec)
2783 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2785 /* Now, check to see if the section is an overlay. */
2786 bfdsec = sec->the_bfd_section;
2787 if (!section_is_overlay (bfdsec))
2788 continue; /* not an overlay section */
2790 /* Mark the overlay as "mapped" */
2791 sec->ovly_mapped = 1;
2793 /* Next, make a pass and unmap any sections that are
2794 overlapped by this new section: */
2795 ALL_OBJSECTIONS (objfile2, sec2)
2796 if (sec2->ovly_mapped &&
2798 sec->the_bfd_section != sec2->the_bfd_section &&
2799 (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
2800 pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
2803 printf_filtered ("Note: section %s unmapped by overlap\n",
2804 bfd_section_name (objfile->obfd,
2805 sec2->the_bfd_section));
2806 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
2810 error ("No overlay section called %s", args);
2813 /* Function: unmap_overlay_command
2814 Mark the overlay section as unmapped
2815 (ie. resident in its LMA address range, rather than the VMA range). */
2818 unmap_overlay_command (char *args, int from_tty)
2820 struct objfile *objfile;
2821 struct obj_section *sec;
2823 if (!overlay_debugging)
2825 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2826 the 'overlay manual' command.");
2828 if (args == 0 || *args == 0)
2829 error ("Argument required: name of an overlay section");
2831 /* First, find a section matching the user supplied argument */
2832 ALL_OBJSECTIONS (objfile, sec)
2833 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2835 if (!sec->ovly_mapped)
2836 error ("Section %s is not mapped", args);
2837 sec->ovly_mapped = 0;
2840 error ("No overlay section called %s", args);
2843 /* Function: overlay_auto_command
2844 A utility command to turn on overlay debugging.
2845 Possibly this should be done via a set/show command. */
2848 overlay_auto_command (char *args, int from_tty)
2850 overlay_debugging = -1;
2852 printf_filtered ("Automatic overlay debugging enabled.");
2855 /* Function: overlay_manual_command
2856 A utility command to turn on overlay debugging.
2857 Possibly this should be done via a set/show command. */
2860 overlay_manual_command (char *args, int from_tty)
2862 overlay_debugging = 1;
2864 printf_filtered ("Overlay debugging enabled.");
2867 /* Function: overlay_off_command
2868 A utility command to turn on overlay debugging.
2869 Possibly this should be done via a set/show command. */
2872 overlay_off_command (char *args, int from_tty)
2874 overlay_debugging = 0;
2876 printf_filtered ("Overlay debugging disabled.");
2880 overlay_load_command (char *args, int from_tty)
2882 if (target_overlay_update)
2883 (*target_overlay_update) (NULL);
2885 error ("This target does not know how to read its overlay state.");
2888 /* Function: overlay_command
2889 A place-holder for a mis-typed command */
2891 /* Command list chain containing all defined "overlay" subcommands. */
2892 struct cmd_list_element *overlaylist;
2895 overlay_command (char *args, int from_tty)
2898 ("\"overlay\" must be followed by the name of an overlay command.\n");
2899 help_list (overlaylist, "overlay ", -1, gdb_stdout);
2903 /* Target Overlays for the "Simplest" overlay manager:
2905 This is GDB's default target overlay layer. It works with the
2906 minimal overlay manager supplied as an example by Cygnus. The
2907 entry point is via a function pointer "target_overlay_update",
2908 so targets that use a different runtime overlay manager can
2909 substitute their own overlay_update function and take over the
2912 The overlay_update function pokes around in the target's data structures
2913 to see what overlays are mapped, and updates GDB's overlay mapping with
2916 In this simple implementation, the target data structures are as follows:
2917 unsigned _novlys; /# number of overlay sections #/
2918 unsigned _ovly_table[_novlys][4] = {
2919 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
2920 {..., ..., ..., ...},
2922 unsigned _novly_regions; /# number of overlay regions #/
2923 unsigned _ovly_region_table[_novly_regions][3] = {
2924 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
2927 These functions will attempt to update GDB's mappedness state in the
2928 symbol section table, based on the target's mappedness state.
2930 To do this, we keep a cached copy of the target's _ovly_table, and
2931 attempt to detect when the cached copy is invalidated. The main
2932 entry point is "simple_overlay_update(SECT), which looks up SECT in
2933 the cached table and re-reads only the entry for that section from
2934 the target (whenever possible).
2937 /* Cached, dynamically allocated copies of the target data structures: */
2938 static unsigned (*cache_ovly_table)[4] = 0;
2940 static unsigned (*cache_ovly_region_table)[3] = 0;
2942 static unsigned cache_novlys = 0;
2944 static unsigned cache_novly_regions = 0;
2946 static CORE_ADDR cache_ovly_table_base = 0;
2948 static CORE_ADDR cache_ovly_region_table_base = 0;
2952 VMA, SIZE, LMA, MAPPED
2954 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
2956 /* Throw away the cached copy of _ovly_table */
2958 simple_free_overlay_table (void)
2960 if (cache_ovly_table)
2961 xfree (cache_ovly_table);
2963 cache_ovly_table = NULL;
2964 cache_ovly_table_base = 0;
2968 /* Throw away the cached copy of _ovly_region_table */
2970 simple_free_overlay_region_table (void)
2972 if (cache_ovly_region_table)
2973 xfree (cache_ovly_region_table);
2974 cache_novly_regions = 0;
2975 cache_ovly_region_table = NULL;
2976 cache_ovly_region_table_base = 0;
2980 /* Read an array of ints from the target into a local buffer.
2981 Convert to host order. int LEN is number of ints */
2983 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
2985 char *buf = alloca (len * TARGET_LONG_BYTES);
2988 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
2989 for (i = 0; i < len; i++)
2990 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
2994 /* Find and grab a copy of the target _ovly_table
2995 (and _novlys, which is needed for the table's size) */
2997 simple_read_overlay_table (void)
2999 struct minimal_symbol *msym;
3001 simple_free_overlay_table ();
3002 msym = lookup_minimal_symbol ("_novlys", 0, 0);
3004 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3006 return 0; /* failure */
3007 cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3008 if (cache_ovly_table != NULL)
3010 msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
3013 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
3014 read_target_long_array (cache_ovly_table_base,
3015 (int *) cache_ovly_table,
3019 return 0; /* failure */
3022 return 0; /* failure */
3023 return 1; /* SUCCESS */
3027 /* Find and grab a copy of the target _ovly_region_table
3028 (and _novly_regions, which is needed for the table's size) */
3030 simple_read_overlay_region_table (void)
3032 struct minimal_symbol *msym;
3034 simple_free_overlay_region_table ();
3035 msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
3037 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3039 return 0; /* failure */
3040 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3041 if (cache_ovly_region_table != NULL)
3043 msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3046 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3047 read_target_long_array (cache_ovly_region_table_base,
3048 (int *) cache_ovly_region_table,
3049 cache_novly_regions * 3);
3052 return 0; /* failure */
3055 return 0; /* failure */
3056 return 1; /* SUCCESS */
3060 /* Function: simple_overlay_update_1
3061 A helper function for simple_overlay_update. Assuming a cached copy
3062 of _ovly_table exists, look through it to find an entry whose vma,
3063 lma and size match those of OSECT. Re-read the entry and make sure
3064 it still matches OSECT (else the table may no longer be valid).
3065 Set OSECT's mapped state to match the entry. Return: 1 for
3066 success, 0 for failure. */
3069 simple_overlay_update_1 (struct obj_section *osect)
3073 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3074 for (i = 0; i < cache_novlys; i++)
3075 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3076 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3077 cache_ovly_table[i][SIZE] == size */ )
3079 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3080 (int *) cache_ovly_table[i], 4);
3081 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3082 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3083 cache_ovly_table[i][SIZE] == size */ )
3085 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3088 else /* Warning! Warning! Target's ovly table has changed! */
3094 /* Function: simple_overlay_update
3095 If OSECT is NULL, then update all sections' mapped state
3096 (after re-reading the entire target _ovly_table).
3097 If OSECT is non-NULL, then try to find a matching entry in the
3098 cached ovly_table and update only OSECT's mapped state.
3099 If a cached entry can't be found or the cache isn't valid, then
3100 re-read the entire cache, and go ahead and update all sections. */
3103 simple_overlay_update (struct obj_section *osect)
3105 struct objfile *objfile;
3107 /* Were we given an osect to look up? NULL means do all of them. */
3109 /* Have we got a cached copy of the target's overlay table? */
3110 if (cache_ovly_table != NULL)
3111 /* Does its cached location match what's currently in the symtab? */
3112 if (cache_ovly_table_base ==
3113 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3114 /* Then go ahead and try to look up this single section in the cache */
3115 if (simple_overlay_update_1 (osect))
3116 /* Found it! We're done. */
3119 /* Cached table no good: need to read the entire table anew.
3120 Or else we want all the sections, in which case it's actually
3121 more efficient to read the whole table in one block anyway. */
3123 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3125 warning ("Failed to read the target overlay mapping table.");
3128 /* Now may as well update all sections, even if only one was requested. */
3129 ALL_OBJSECTIONS (objfile, osect)
3130 if (section_is_overlay (osect->the_bfd_section))
3134 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3135 for (i = 0; i < cache_novlys; i++)
3136 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3137 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3138 cache_ovly_table[i][SIZE] == size */ )
3139 { /* obj_section matches i'th entry in ovly_table */
3140 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3141 break; /* finished with inner for loop: break out */
3148 _initialize_symfile (void)
3150 struct cmd_list_element *c;
3152 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3153 "Load symbol table from executable file FILE.\n\
3154 The `file' command can also load symbol tables, as well as setting the file\n\
3155 to execute.", &cmdlist);
3156 c->completer = filename_completer;
3158 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3159 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3160 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3161 ADDR is the starting address of the file's text.\n\
3162 The optional arguments are section-name section-address pairs and\n\
3163 should be specified if the data and bss segments are not contiguous\n\
3164 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3166 c->completer = filename_completer;
3168 c = add_cmd ("add-shared-symbol-files", class_files,
3169 add_shared_symbol_files_command,
3170 "Load the symbols from shared objects in the dynamic linker's link map.",
3172 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3175 c = add_cmd ("load", class_files, load_command,
3176 "Dynamically load FILE into the running program, and record its symbols\n\
3177 for access from GDB.", &cmdlist);
3178 c->completer = filename_completer;
3181 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3182 (char *) &symbol_reloading,
3183 "Set dynamic symbol table reloading multiple times in one run.",
3187 add_prefix_cmd ("overlay", class_support, overlay_command,
3188 "Commands for debugging overlays.", &overlaylist,
3189 "overlay ", 0, &cmdlist);
3191 add_com_alias ("ovly", "overlay", class_alias, 1);
3192 add_com_alias ("ov", "overlay", class_alias, 1);
3194 add_cmd ("map-overlay", class_support, map_overlay_command,
3195 "Assert that an overlay section is mapped.", &overlaylist);
3197 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3198 "Assert that an overlay section is unmapped.", &overlaylist);
3200 add_cmd ("list-overlays", class_support, list_overlays_command,
3201 "List mappings of overlay sections.", &overlaylist);
3203 add_cmd ("manual", class_support, overlay_manual_command,
3204 "Enable overlay debugging.", &overlaylist);
3205 add_cmd ("off", class_support, overlay_off_command,
3206 "Disable overlay debugging.", &overlaylist);
3207 add_cmd ("auto", class_support, overlay_auto_command,
3208 "Enable automatic overlay debugging.", &overlaylist);
3209 add_cmd ("load-target", class_support, overlay_load_command,
3210 "Read the overlay mapping state from the target.", &overlaylist);
3212 /* Filename extension to source language lookup table: */
3213 init_filename_language_table ();
3214 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3216 "Set mapping between filename extension and source language.\n\
3217 Usage: set extension-language .foo bar",
3219 c->function.cfunc = set_ext_lang_command;
3221 add_info ("extensions", info_ext_lang_command,
3222 "All filename extensions associated with a source language.");
3225 (add_set_cmd ("download-write-size", class_obscure,
3226 var_integer, (char *) &download_write_size,
3227 "Set the write size used when downloading a program.\n"
3228 "Only used when downloading a program onto a remote\n"
3229 "target. Specify zero, or a negative value, to disable\n"
3230 "blocked writes. The actual size of each transfer is also\n"
3231 "limited by the size of the target packet and the memory\n"