1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
4 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
6 Contributed by Cygnus Support, using pieces from other GDB modules.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
37 #include "breakpoint.h"
39 #include "complaints.h"
41 #include "inferior.h" /* for write_pc */
42 #include "filenames.h" /* for DOSish file names */
43 #include "gdb-stabs.h"
44 #include "gdb_obstack.h"
45 #include "completer.h"
48 #include <readline/readline.h>
49 #include "gdb_assert.h"
52 #include <sys/types.h>
54 #include "gdb_string.h"
65 /* Some HP-UX related globals to clear when a new "main"
66 symbol file is loaded. HP-specific. */
68 extern int hp_som_som_object_present;
69 extern int hp_cxx_exception_support_initialized;
70 #define RESET_HP_UX_GLOBALS() do {\
71 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
72 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
76 int (*ui_load_progress_hook) (const char *section, unsigned long num);
77 void (*show_load_progress) (const char *section,
78 unsigned long section_sent,
79 unsigned long section_size,
80 unsigned long total_sent,
81 unsigned long total_size);
82 void (*pre_add_symbol_hook) (char *);
83 void (*post_add_symbol_hook) (void);
84 void (*target_new_objfile_hook) (struct objfile *);
86 static void clear_symtab_users_cleanup (void *ignore);
88 /* Global variables owned by this file */
89 int readnow_symbol_files; /* Read full symbols immediately */
91 /* External variables and functions referenced. */
93 extern void report_transfer_performance (unsigned long, time_t, time_t);
95 /* Functions this file defines */
98 static int simple_read_overlay_region_table (void);
99 static void simple_free_overlay_region_table (void);
102 static void set_initial_language (void);
104 static void load_command (char *, int);
106 static void symbol_file_add_main_1 (char *args, int from_tty, int flags);
108 static void add_symbol_file_command (char *, int);
110 static void add_shared_symbol_files_command (char *, int);
112 static void reread_separate_symbols (struct objfile *objfile);
114 static void cashier_psymtab (struct partial_symtab *);
116 bfd *symfile_bfd_open (char *);
118 int get_section_index (struct objfile *, char *);
120 static void find_sym_fns (struct objfile *);
122 static void decrement_reading_symtab (void *);
124 static void overlay_invalidate_all (void);
126 static int overlay_is_mapped (struct obj_section *);
128 void list_overlays_command (char *, int);
130 void map_overlay_command (char *, int);
132 void unmap_overlay_command (char *, int);
134 static void overlay_auto_command (char *, int);
136 static void overlay_manual_command (char *, int);
138 static void overlay_off_command (char *, int);
140 static void overlay_load_command (char *, int);
142 static void overlay_command (char *, int);
144 static void simple_free_overlay_table (void);
146 static void read_target_long_array (CORE_ADDR, unsigned int *, int);
148 static int simple_read_overlay_table (void);
150 static int simple_overlay_update_1 (struct obj_section *);
152 static void add_filename_language (char *ext, enum language lang);
154 static void set_ext_lang_command (char *args, int from_tty);
156 static void info_ext_lang_command (char *args, int from_tty);
158 static char *find_separate_debug_file (struct objfile *objfile);
160 static void init_filename_language_table (void);
162 void _initialize_symfile (void);
164 /* List of all available sym_fns. On gdb startup, each object file reader
165 calls add_symtab_fns() to register information on each format it is
168 static struct sym_fns *symtab_fns = NULL;
170 /* Flag for whether user will be reloading symbols multiple times.
171 Defaults to ON for VxWorks, otherwise OFF. */
173 #ifdef SYMBOL_RELOADING_DEFAULT
174 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
176 int symbol_reloading = 0;
179 /* If non-zero, shared library symbols will be added automatically
180 when the inferior is created, new libraries are loaded, or when
181 attaching to the inferior. This is almost always what users will
182 want to have happen; but for very large programs, the startup time
183 will be excessive, and so if this is a problem, the user can clear
184 this flag and then add the shared library symbols as needed. Note
185 that there is a potential for confusion, since if the shared
186 library symbols are not loaded, commands like "info fun" will *not*
187 report all the functions that are actually present. */
189 int auto_solib_add = 1;
191 /* For systems that support it, a threshold size in megabytes. If
192 automatically adding a new library's symbol table to those already
193 known to the debugger would cause the total shared library symbol
194 size to exceed this threshhold, then the shlib's symbols are not
195 added. The threshold is ignored if the user explicitly asks for a
196 shlib to be added, such as when using the "sharedlibrary"
199 int auto_solib_limit;
202 /* Since this function is called from within qsort, in an ANSI environment
203 it must conform to the prototype for qsort, which specifies that the
204 comparison function takes two "void *" pointers. */
207 compare_symbols (const void *s1p, const void *s2p)
209 register struct symbol **s1, **s2;
211 s1 = (struct symbol **) s1p;
212 s2 = (struct symbol **) s2p;
213 return (strcmp (SYMBOL_NATURAL_NAME (*s1), SYMBOL_NATURAL_NAME (*s2)));
216 /* This compares two partial symbols by names, using strcmp_iw_ordered
217 for the comparison. */
220 compare_psymbols (const void *s1p, const void *s2p)
222 struct partial_symbol *const *s1 = s1p;
223 struct partial_symbol *const *s2 = s2p;
225 return strcmp_iw_ordered (SYMBOL_NATURAL_NAME (*s1),
226 SYMBOL_NATURAL_NAME (*s2));
230 sort_pst_symbols (struct partial_symtab *pst)
232 /* Sort the global list; don't sort the static list */
234 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
235 pst->n_global_syms, sizeof (struct partial_symbol *),
239 /* Make a null terminated copy of the string at PTR with SIZE characters in
240 the obstack pointed to by OBSTACKP . Returns the address of the copy.
241 Note that the string at PTR does not have to be null terminated, I.E. it
242 may be part of a larger string and we are only saving a substring. */
245 obsavestring (const char *ptr, int size, struct obstack *obstackp)
247 register char *p = (char *) obstack_alloc (obstackp, size + 1);
248 /* Open-coded memcpy--saves function call time. These strings are usually
249 short. FIXME: Is this really still true with a compiler that can
252 register const char *p1 = ptr;
253 register char *p2 = p;
254 const char *end = ptr + size;
262 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
263 in the obstack pointed to by OBSTACKP. */
266 obconcat (struct obstack *obstackp, const char *s1, const char *s2,
269 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
270 register char *val = (char *) obstack_alloc (obstackp, len);
277 /* True if we are nested inside psymtab_to_symtab. */
279 int currently_reading_symtab = 0;
282 decrement_reading_symtab (void *dummy)
284 currently_reading_symtab--;
287 /* Get the symbol table that corresponds to a partial_symtab.
288 This is fast after the first time you do it. In fact, there
289 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
293 psymtab_to_symtab (register struct partial_symtab *pst)
295 /* If it's been looked up before, return it. */
299 /* If it has not yet been read in, read it. */
302 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
303 currently_reading_symtab++;
304 (*pst->read_symtab) (pst);
305 do_cleanups (back_to);
311 /* Initialize entry point information for this objfile. */
314 init_entry_point_info (struct objfile *objfile)
316 /* Save startup file's range of PC addresses to help blockframe.c
317 decide where the bottom of the stack is. */
319 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
321 /* Executable file -- record its entry point so we'll recognize
322 the startup file because it contains the entry point. */
323 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
327 /* Examination of non-executable.o files. Short-circuit this stuff. */
328 objfile->ei.entry_point = INVALID_ENTRY_POINT;
330 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
331 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
332 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
333 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
334 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
335 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
338 /* Get current entry point address. */
341 entry_point_address (void)
343 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
346 /* Remember the lowest-addressed loadable section we've seen.
347 This function is called via bfd_map_over_sections.
349 In case of equal vmas, the section with the largest size becomes the
350 lowest-addressed loadable section.
352 If the vmas and sizes are equal, the last section is considered the
353 lowest-addressed loadable section. */
356 find_lowest_section (bfd *abfd, asection *sect, void *obj)
358 asection **lowest = (asection **) obj;
360 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
363 *lowest = sect; /* First loadable section */
364 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
365 *lowest = sect; /* A lower loadable section */
366 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
367 && (bfd_section_size (abfd, (*lowest))
368 <= bfd_section_size (abfd, sect)))
372 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
374 struct section_addr_info *
375 alloc_section_addr_info (size_t num_sections)
377 struct section_addr_info *sap;
380 size = (sizeof (struct section_addr_info)
381 + sizeof (struct other_sections) * (num_sections - 1));
382 sap = (struct section_addr_info *) xmalloc (size);
383 memset (sap, 0, size);
384 sap->num_sections = num_sections;
389 /* Build (allocate and populate) a section_addr_info struct from
390 an existing section table. */
392 extern struct section_addr_info *
393 build_section_addr_info_from_section_table (const struct section_table *start,
394 const struct section_table *end)
396 struct section_addr_info *sap;
397 const struct section_table *stp;
400 sap = alloc_section_addr_info (end - start);
402 for (stp = start, oidx = 0; stp != end; stp++)
404 if (bfd_get_section_flags (stp->bfd,
405 stp->the_bfd_section) & (SEC_ALLOC | SEC_LOAD)
406 && oidx < end - start)
408 sap->other[oidx].addr = stp->addr;
409 sap->other[oidx].name
410 = xstrdup (bfd_section_name (stp->bfd, stp->the_bfd_section));
411 sap->other[oidx].sectindex = stp->the_bfd_section->index;
420 /* Free all memory allocated by build_section_addr_info_from_section_table. */
423 free_section_addr_info (struct section_addr_info *sap)
427 for (idx = 0; idx < sap->num_sections; idx++)
428 if (sap->other[idx].name)
429 xfree (sap->other[idx].name);
434 /* Initialize OBJFILE's sect_index_* members. */
436 init_objfile_sect_indices (struct objfile *objfile)
441 sect = bfd_get_section_by_name (objfile->obfd, ".text");
443 objfile->sect_index_text = sect->index;
445 sect = bfd_get_section_by_name (objfile->obfd, ".data");
447 objfile->sect_index_data = sect->index;
449 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
451 objfile->sect_index_bss = sect->index;
453 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
455 objfile->sect_index_rodata = sect->index;
457 /* This is where things get really weird... We MUST have valid
458 indices for the various sect_index_* members or gdb will abort.
459 So if for example, there is no ".text" section, we have to
460 accomodate that. Except when explicitly adding symbol files at
461 some address, section_offsets contains nothing but zeros, so it
462 doesn't matter which slot in section_offsets the individual
463 sect_index_* members index into. So if they are all zero, it is
464 safe to just point all the currently uninitialized indices to the
467 for (i = 0; i < objfile->num_sections; i++)
469 if (ANOFFSET (objfile->section_offsets, i) != 0)
474 if (i == objfile->num_sections)
476 if (objfile->sect_index_text == -1)
477 objfile->sect_index_text = 0;
478 if (objfile->sect_index_data == -1)
479 objfile->sect_index_data = 0;
480 if (objfile->sect_index_bss == -1)
481 objfile->sect_index_bss = 0;
482 if (objfile->sect_index_rodata == -1)
483 objfile->sect_index_rodata = 0;
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)
500 objfile->num_sections = bfd_count_sections (objfile->obfd);
501 objfile->section_offsets = (struct section_offsets *)
502 obstack_alloc (&objfile->psymbol_obstack,
503 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
504 memset (objfile->section_offsets, 0,
505 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
507 /* Now calculate offsets for section that were specified by the
509 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
511 struct other_sections *osp ;
513 osp = &addrs->other[i] ;
517 /* Record all sections in offsets */
518 /* The section_offsets in the objfile are here filled in using
520 (objfile->section_offsets)->offsets[osp->sectindex] = osp->addr;
523 /* Remember the bfd indexes for the .text, .data, .bss and
525 init_objfile_sect_indices (objfile);
529 /* Process a symbol file, as either the main file or as a dynamically
532 OBJFILE is where the symbols are to be read from.
534 ADDRS is the list of section load addresses. If the user has given
535 an 'add-symbol-file' command, then this is the list of offsets and
536 addresses he or she provided as arguments to the command; or, if
537 we're handling a shared library, these are the actual addresses the
538 sections are loaded at, according to the inferior's dynamic linker
539 (as gleaned by GDB's shared library code). We convert each address
540 into an offset from the section VMA's as it appears in the object
541 file, and then call the file's sym_offsets function to convert this
542 into a format-specific offset table --- a `struct section_offsets'.
543 If ADDRS is non-zero, OFFSETS must be zero.
545 OFFSETS is a table of section offsets already in the right
546 format-specific representation. NUM_OFFSETS is the number of
547 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
548 assume this is the proper table the call to sym_offsets described
549 above would produce. Instead of calling sym_offsets, we just dump
550 it right into objfile->section_offsets. (When we're re-reading
551 symbols from an objfile, we don't have the original load address
552 list any more; all we have is the section offset table.) If
553 OFFSETS is non-zero, ADDRS must be zero.
555 MAINLINE is nonzero if this is the main symbol file, or zero if
556 it's an extra symbol file such as dynamically loaded code.
558 VERBO is nonzero if the caller has printed a verbose message about
559 the symbol reading (and complaints can be more terse about it). */
562 syms_from_objfile (struct objfile *objfile,
563 struct section_addr_info *addrs,
564 struct section_offsets *offsets,
569 struct section_addr_info *local_addr = NULL;
570 struct cleanup *old_chain;
572 gdb_assert (! (addrs && offsets));
574 init_entry_point_info (objfile);
575 find_sym_fns (objfile);
577 if (objfile->sf == NULL)
578 return; /* No symbols. */
580 /* Make sure that partially constructed symbol tables will be cleaned up
581 if an error occurs during symbol reading. */
582 old_chain = make_cleanup_free_objfile (objfile);
584 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
585 list. We now establish the convention that an addr of zero means
586 no load address was specified. */
587 if (! addrs && ! offsets)
590 = alloc_section_addr_info (bfd_count_sections (objfile->obfd));
591 make_cleanup (xfree, local_addr);
595 /* Now either addrs or offsets is non-zero. */
599 /* We will modify the main symbol table, make sure that all its users
600 will be cleaned up if an error occurs during symbol reading. */
601 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
603 /* Since no error yet, throw away the old symbol table. */
605 if (symfile_objfile != NULL)
607 free_objfile (symfile_objfile);
608 symfile_objfile = NULL;
611 /* Currently we keep symbols from the add-symbol-file command.
612 If the user wants to get rid of them, they should do "symbol-file"
613 without arguments first. Not sure this is the best behavior
616 (*objfile->sf->sym_new_init) (objfile);
619 /* Convert addr into an offset rather than an absolute address.
620 We find the lowest address of a loaded segment in the objfile,
621 and assume that <addr> is where that got loaded.
623 We no longer warn if the lowest section is not a text segment (as
624 happens for the PA64 port. */
625 if (!mainline && addrs && addrs->other[0].name)
627 asection *lower_sect;
629 CORE_ADDR lower_offset;
632 /* Find lowest loadable section to be used as starting point for
633 continguous sections. FIXME!! won't work without call to find
634 .text first, but this assumes text is lowest section. */
635 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
636 if (lower_sect == NULL)
637 bfd_map_over_sections (objfile->obfd, find_lowest_section,
639 if (lower_sect == NULL)
640 warning ("no loadable sections found in added symbol-file %s",
643 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
644 warning ("Lowest section in %s is %s at %s",
646 bfd_section_name (objfile->obfd, lower_sect),
647 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
648 if (lower_sect != NULL)
649 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
653 /* Calculate offsets for the loadable sections.
654 FIXME! Sections must be in order of increasing loadable section
655 so that contiguous sections can use the lower-offset!!!
657 Adjust offsets if the segments are not contiguous.
658 If the section is contiguous, its offset should be set to
659 the offset of the highest loadable section lower than it
660 (the loadable section directly below it in memory).
661 this_offset = lower_offset = lower_addr - lower_orig_addr */
663 for (i = 0; i < addrs->num_sections && addrs->other[i].name; i++)
665 if (addrs->other[i].addr != 0)
667 sect = bfd_get_section_by_name (objfile->obfd,
668 addrs->other[i].name);
672 -= bfd_section_vma (objfile->obfd, sect);
673 lower_offset = addrs->other[i].addr;
674 /* This is the index used by BFD. */
675 addrs->other[i].sectindex = sect->index ;
679 warning ("section %s not found in %s",
680 addrs->other[i].name,
682 addrs->other[i].addr = 0;
686 addrs->other[i].addr = lower_offset;
690 /* Initialize symbol reading routines for this objfile, allow complaints to
691 appear for this new file, and record how verbose to be, then do the
692 initial symbol reading for this file. */
694 (*objfile->sf->sym_init) (objfile);
695 clear_complaints (&symfile_complaints, 1, verbo);
698 (*objfile->sf->sym_offsets) (objfile, addrs);
701 size_t size = SIZEOF_N_SECTION_OFFSETS (num_offsets);
703 /* Just copy in the offset table directly as given to us. */
704 objfile->num_sections = num_offsets;
705 objfile->section_offsets
706 = ((struct section_offsets *)
707 obstack_alloc (&objfile->psymbol_obstack, size));
708 memcpy (objfile->section_offsets, offsets, size);
710 init_objfile_sect_indices (objfile);
713 #ifndef DEPRECATED_IBM6000_TARGET
714 /* This is a SVR4/SunOS specific hack, I think. In any event, it
715 screws RS/6000. sym_offsets should be doing this sort of thing,
716 because it knows the mapping between bfd sections and
718 /* This is a hack. As far as I can tell, section offsets are not
719 target dependent. They are all set to addr with a couple of
720 exceptions. The exceptions are sysvr4 shared libraries, whose
721 offsets are kept in solib structures anyway and rs6000 xcoff
722 which handles shared libraries in a completely unique way.
724 Section offsets are built similarly, except that they are built
725 by adding addr in all cases because there is no clear mapping
726 from section_offsets into actual sections. Note that solib.c
727 has a different algorithm for finding section offsets.
729 These should probably all be collapsed into some target
730 independent form of shared library support. FIXME. */
734 struct obj_section *s;
736 /* Map section offsets in "addr" back to the object's
737 sections by comparing the section names with bfd's
738 section names. Then adjust the section address by
739 the offset. */ /* for gdb/13815 */
741 ALL_OBJFILE_OSECTIONS (objfile, s)
743 CORE_ADDR s_addr = 0;
747 !s_addr && i < addrs->num_sections && addrs->other[i].name;
749 if (strcmp (bfd_section_name (s->objfile->obfd,
751 addrs->other[i].name) == 0)
752 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
754 s->addr -= s->offset;
756 s->endaddr -= s->offset;
757 s->endaddr += s_addr;
761 #endif /* not DEPRECATED_IBM6000_TARGET */
763 (*objfile->sf->sym_read) (objfile, mainline);
765 /* Don't allow char * to have a typename (else would get caddr_t).
766 Ditto void *. FIXME: Check whether this is now done by all the
767 symbol readers themselves (many of them now do), and if so remove
770 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
771 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
773 /* Mark the objfile has having had initial symbol read attempted. Note
774 that this does not mean we found any symbols... */
776 objfile->flags |= OBJF_SYMS;
778 /* Discard cleanups as symbol reading was successful. */
780 discard_cleanups (old_chain);
783 /* Perform required actions after either reading in the initial
784 symbols for a new objfile, or mapping in the symbols from a reusable
788 new_symfile_objfile (struct objfile *objfile, int mainline, int verbo)
791 /* If this is the main symbol file we have to clean up all users of the
792 old main symbol file. Otherwise it is sufficient to fixup all the
793 breakpoints that may have been redefined by this symbol file. */
796 /* OK, make it the "real" symbol file. */
797 symfile_objfile = objfile;
799 clear_symtab_users ();
803 breakpoint_re_set ();
806 /* We're done reading the symbol file; finish off complaints. */
807 clear_complaints (&symfile_complaints, 0, verbo);
810 /* Process a symbol file, as either the main file or as a dynamically
813 NAME is the file name (which will be tilde-expanded and made
814 absolute herein) (but we don't free or modify NAME itself).
816 FROM_TTY says how verbose to be.
818 MAINLINE specifies whether this is the main symbol file, or whether
819 it's an extra symbol file such as dynamically loaded code.
821 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
822 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
825 Upon success, returns a pointer to the objfile that was added.
826 Upon failure, jumps back to command level (never returns). */
827 static struct objfile *
828 symbol_file_add_with_addrs_or_offsets (char *name, int from_tty,
829 struct section_addr_info *addrs,
830 struct section_offsets *offsets,
832 int mainline, int flags)
834 struct objfile *objfile;
835 struct partial_symtab *psymtab;
838 struct section_addr_info *orig_addrs;
839 struct cleanup *my_cleanups;
841 /* Open a bfd for the file, and give user a chance to burp if we'd be
842 interactively wiping out any existing symbols. */
844 abfd = symfile_bfd_open (name);
846 if ((have_full_symbols () || have_partial_symbols ())
849 && !query ("Load new symbol table from \"%s\"? ", name))
850 error ("Not confirmed.");
852 objfile = allocate_objfile (abfd, flags);
854 orig_addrs = alloc_section_addr_info (bfd_count_sections (abfd));
855 my_cleanups = make_cleanup (xfree, orig_addrs);
859 orig_addrs->num_sections = addrs->num_sections;
860 for (i = 0; i < addrs->num_sections; i++)
861 orig_addrs->other[i] = addrs->other[i];
864 /* If the objfile uses a mapped symbol file, and we have a psymtab for
865 it, then skip reading any symbols at this time. */
867 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
869 /* We mapped in an existing symbol table file that already has had
870 initial symbol reading performed, so we can skip that part. Notify
871 the user that instead of reading the symbols, they have been mapped.
873 if (from_tty || info_verbose)
875 printf_filtered ("Mapped symbols for %s...", name);
877 gdb_flush (gdb_stdout);
879 init_entry_point_info (objfile);
880 find_sym_fns (objfile);
884 /* We either created a new mapped symbol table, mapped an existing
885 symbol table file which has not had initial symbol reading
886 performed, or need to read an unmapped symbol table. */
887 if (from_tty || info_verbose)
889 if (pre_add_symbol_hook)
890 pre_add_symbol_hook (name);
893 printf_filtered ("Reading symbols from %s...", name);
895 gdb_flush (gdb_stdout);
898 syms_from_objfile (objfile, addrs, offsets, num_offsets,
902 /* We now have at least a partial symbol table. Check to see if the
903 user requested that all symbols be read on initial access via either
904 the gdb startup command line or on a per symbol file basis. Expand
905 all partial symbol tables for this objfile if so. */
907 if ((flags & OBJF_READNOW) || readnow_symbol_files)
909 if (from_tty || info_verbose)
911 printf_filtered ("expanding to full symbols...");
913 gdb_flush (gdb_stdout);
916 for (psymtab = objfile->psymtabs;
918 psymtab = psymtab->next)
920 psymtab_to_symtab (psymtab);
924 debugfile = find_separate_debug_file (objfile);
929 objfile->separate_debug_objfile
930 = symbol_file_add (debugfile, from_tty, orig_addrs, 0, flags);
934 objfile->separate_debug_objfile
935 = symbol_file_add (debugfile, from_tty, NULL, 0, flags);
937 objfile->separate_debug_objfile->separate_debug_objfile_backlink
940 /* Put the separate debug object before the normal one, this is so that
941 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
942 put_objfile_before (objfile->separate_debug_objfile, objfile);
947 if (!have_partial_symbols () && !have_full_symbols ())
950 printf_filtered ("(no debugging symbols found)...");
954 if (from_tty || info_verbose)
956 if (post_add_symbol_hook)
957 post_add_symbol_hook ();
960 printf_filtered ("done.\n");
964 /* We print some messages regardless of whether 'from_tty ||
965 info_verbose' is true, so make sure they go out at the right
967 gdb_flush (gdb_stdout);
969 do_cleanups (my_cleanups);
971 if (objfile->sf == NULL)
972 return objfile; /* No symbols. */
974 new_symfile_objfile (objfile, mainline, from_tty);
976 if (target_new_objfile_hook)
977 target_new_objfile_hook (objfile);
983 /* Process a symbol file, as either the main file or as a dynamically
984 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
987 symbol_file_add (char *name, int from_tty, struct section_addr_info *addrs,
988 int mainline, int flags)
990 return symbol_file_add_with_addrs_or_offsets (name, from_tty, addrs, 0, 0,
995 /* Call symbol_file_add() with default values and update whatever is
996 affected by the loading of a new main().
997 Used when the file is supplied in the gdb command line
998 and by some targets with special loading requirements.
999 The auxiliary function, symbol_file_add_main_1(), has the flags
1000 argument for the switches that can only be specified in the symbol_file
1004 symbol_file_add_main (char *args, int from_tty)
1006 symbol_file_add_main_1 (args, from_tty, 0);
1010 symbol_file_add_main_1 (char *args, int from_tty, int flags)
1012 symbol_file_add (args, from_tty, NULL, 1, flags);
1015 RESET_HP_UX_GLOBALS ();
1018 /* Getting new symbols may change our opinion about
1019 what is frameless. */
1020 reinit_frame_cache ();
1022 set_initial_language ();
1026 symbol_file_clear (int from_tty)
1028 if ((have_full_symbols () || have_partial_symbols ())
1030 && !query ("Discard symbol table from `%s'? ",
1031 symfile_objfile->name))
1032 error ("Not confirmed.");
1033 free_all_objfiles ();
1035 /* solib descriptors may have handles to objfiles. Since their
1036 storage has just been released, we'd better wipe the solib
1037 descriptors as well.
1039 #if defined(SOLIB_RESTART)
1043 symfile_objfile = NULL;
1045 printf_unfiltered ("No symbol file now.\n");
1047 RESET_HP_UX_GLOBALS ();
1052 get_debug_link_info (struct objfile *objfile, unsigned long *crc32_out)
1055 bfd_size_type debuglink_size;
1056 unsigned long crc32;
1061 sect = bfd_get_section_by_name (objfile->obfd, ".gnu_debuglink");
1066 debuglink_size = bfd_section_size (objfile->obfd, sect);
1068 contents = xmalloc (debuglink_size);
1069 bfd_get_section_contents (objfile->obfd, sect, contents,
1070 (file_ptr)0, (bfd_size_type)debuglink_size);
1072 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1073 crc_offset = strlen (contents) + 1;
1074 crc_offset = (crc_offset + 3) & ~3;
1076 crc32 = bfd_get_32 (objfile->obfd, (bfd_byte *) (contents + crc_offset));
1083 separate_debug_file_exists (const char *name, unsigned long crc)
1085 unsigned long file_crc = 0;
1087 char buffer[8*1024];
1090 fd = open (name, O_RDONLY | O_BINARY);
1094 while ((count = read (fd, buffer, sizeof (buffer))) > 0)
1095 file_crc = gnu_debuglink_crc32 (file_crc, buffer, count);
1099 return crc == file_crc;
1102 static char *debug_file_directory = NULL;
1104 #if ! defined (DEBUG_SUBDIRECTORY)
1105 #define DEBUG_SUBDIRECTORY ".debug"
1109 find_separate_debug_file (struct objfile *objfile)
1116 bfd_size_type debuglink_size;
1117 unsigned long crc32;
1120 basename = get_debug_link_info (objfile, &crc32);
1122 if (basename == NULL)
1125 dir = xstrdup (objfile->name);
1127 /* Strip off the final filename part, leaving the directory name,
1128 followed by a slash. Objfile names should always be absolute and
1129 tilde-expanded, so there should always be a slash in there
1131 for (i = strlen(dir) - 1; i >= 0; i--)
1133 if (IS_DIR_SEPARATOR (dir[i]))
1136 gdb_assert (i >= 0 && IS_DIR_SEPARATOR (dir[i]));
1139 debugfile = alloca (strlen (debug_file_directory) + 1
1141 + strlen (DEBUG_SUBDIRECTORY)
1146 /* First try in the same directory as the original file. */
1147 strcpy (debugfile, dir);
1148 strcat (debugfile, basename);
1150 if (separate_debug_file_exists (debugfile, crc32))
1154 return xstrdup (debugfile);
1157 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1158 strcpy (debugfile, dir);
1159 strcat (debugfile, DEBUG_SUBDIRECTORY);
1160 strcat (debugfile, "/");
1161 strcat (debugfile, basename);
1163 if (separate_debug_file_exists (debugfile, crc32))
1167 return xstrdup (debugfile);
1170 /* Then try in the global debugfile directory. */
1171 strcpy (debugfile, debug_file_directory);
1172 strcat (debugfile, "/");
1173 strcat (debugfile, dir);
1174 strcat (debugfile, basename);
1176 if (separate_debug_file_exists (debugfile, crc32))
1180 return xstrdup (debugfile);
1189 /* This is the symbol-file command. Read the file, analyze its
1190 symbols, and add a struct symtab to a symtab list. The syntax of
1191 the command is rather bizarre--(1) buildargv implements various
1192 quoting conventions which are undocumented and have little or
1193 nothing in common with the way things are quoted (or not quoted)
1194 elsewhere in GDB, (2) options are used, which are not generally
1195 used in GDB (perhaps "set mapped on", "set readnow on" would be
1196 better), (3) the order of options matters, which is contrary to GNU
1197 conventions (because it is confusing and inconvenient). */
1198 /* Note: ezannoni 2000-04-17. This function used to have support for
1199 rombug (see remote-os9k.c). It consisted of a call to target_link()
1200 (target.c) to get the address of the text segment from the target,
1201 and pass that to symbol_file_add(). This is no longer supported. */
1204 symbol_file_command (char *args, int from_tty)
1208 struct cleanup *cleanups;
1209 int flags = OBJF_USERLOADED;
1215 symbol_file_clear (from_tty);
1219 if ((argv = buildargv (args)) == NULL)
1223 cleanups = make_cleanup_freeargv (argv);
1224 while (*argv != NULL)
1226 if (STREQ (*argv, "-mapped"))
1227 flags |= OBJF_MAPPED;
1229 if (STREQ (*argv, "-readnow"))
1230 flags |= OBJF_READNOW;
1233 error ("unknown option `%s'", *argv);
1238 symbol_file_add_main_1 (name, from_tty, flags);
1245 error ("no symbol file name was specified");
1247 do_cleanups (cleanups);
1251 /* Set the initial language.
1253 A better solution would be to record the language in the psymtab when reading
1254 partial symbols, and then use it (if known) to set the language. This would
1255 be a win for formats that encode the language in an easily discoverable place,
1256 such as DWARF. For stabs, we can jump through hoops looking for specially
1257 named symbols or try to intuit the language from the specific type of stabs
1258 we find, but we can't do that until later when we read in full symbols.
1262 set_initial_language (void)
1264 struct partial_symtab *pst;
1265 enum language lang = language_unknown;
1267 pst = find_main_psymtab ();
1270 if (pst->filename != NULL)
1272 lang = deduce_language_from_filename (pst->filename);
1274 if (lang == language_unknown)
1276 /* Make C the default language */
1279 set_language (lang);
1280 expected_language = current_language; /* Don't warn the user */
1284 /* Open file specified by NAME and hand it off to BFD for preliminary
1285 analysis. Result is a newly initialized bfd *, which includes a newly
1286 malloc'd` copy of NAME (tilde-expanded and made absolute).
1287 In case of trouble, error() is called. */
1290 symfile_bfd_open (char *name)
1294 char *absolute_name;
1298 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1300 /* Look down path for it, allocate 2nd new malloc'd copy. */
1301 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1302 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1305 char *exename = alloca (strlen (name) + 5);
1306 strcat (strcpy (exename, name), ".exe");
1307 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1313 make_cleanup (xfree, name);
1314 perror_with_name (name);
1316 xfree (name); /* Free 1st new malloc'd copy */
1317 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1318 /* It'll be freed in free_objfile(). */
1320 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1324 make_cleanup (xfree, name);
1325 error ("\"%s\": can't open to read symbols: %s.", name,
1326 bfd_errmsg (bfd_get_error ()));
1328 sym_bfd->cacheable = 1;
1330 if (!bfd_check_format (sym_bfd, bfd_object))
1332 /* FIXME: should be checking for errors from bfd_close (for one thing,
1333 on error it does not free all the storage associated with the
1335 bfd_close (sym_bfd); /* This also closes desc */
1336 make_cleanup (xfree, name);
1337 error ("\"%s\": can't read symbols: %s.", name,
1338 bfd_errmsg (bfd_get_error ()));
1343 /* Return the section index for the given section name. Return -1 if
1344 the section was not found. */
1346 get_section_index (struct objfile *objfile, char *section_name)
1348 asection *sect = bfd_get_section_by_name (objfile->obfd, section_name);
1355 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1356 startup by the _initialize routine in each object file format reader,
1357 to register information about each format the the reader is prepared
1361 add_symtab_fns (struct sym_fns *sf)
1363 sf->next = symtab_fns;
1368 /* Initialize to read symbols from the symbol file sym_bfd. It either
1369 returns or calls error(). The result is an initialized struct sym_fns
1370 in the objfile structure, that contains cached information about the
1374 find_sym_fns (struct objfile *objfile)
1377 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1378 char *our_target = bfd_get_target (objfile->obfd);
1380 if (our_flavour == bfd_target_srec_flavour
1381 || our_flavour == bfd_target_ihex_flavour
1382 || our_flavour == bfd_target_tekhex_flavour)
1383 return; /* No symbols. */
1385 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1387 if (our_flavour == sf->sym_flavour)
1393 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1394 bfd_get_target (objfile->obfd));
1397 /* This function runs the load command of our current target. */
1400 load_command (char *arg, int from_tty)
1403 arg = get_exec_file (1);
1404 target_load (arg, from_tty);
1406 /* After re-loading the executable, we don't really know which
1407 overlays are mapped any more. */
1408 overlay_cache_invalid = 1;
1411 /* This version of "load" should be usable for any target. Currently
1412 it is just used for remote targets, not inftarg.c or core files,
1413 on the theory that only in that case is it useful.
1415 Avoiding xmodem and the like seems like a win (a) because we don't have
1416 to worry about finding it, and (b) On VMS, fork() is very slow and so
1417 we don't want to run a subprocess. On the other hand, I'm not sure how
1418 performance compares. */
1420 static int download_write_size = 512;
1421 static int validate_download = 0;
1423 /* Callback service function for generic_load (bfd_map_over_sections). */
1426 add_section_size_callback (bfd *abfd, asection *asec, void *data)
1428 bfd_size_type *sum = data;
1430 *sum += bfd_get_section_size_before_reloc (asec);
1433 /* Opaque data for load_section_callback. */
1434 struct load_section_data {
1435 unsigned long load_offset;
1436 unsigned long write_count;
1437 unsigned long data_count;
1438 bfd_size_type total_size;
1441 /* Callback service function for generic_load (bfd_map_over_sections). */
1444 load_section_callback (bfd *abfd, asection *asec, void *data)
1446 struct load_section_data *args = data;
1448 if (bfd_get_section_flags (abfd, asec) & SEC_LOAD)
1450 bfd_size_type size = bfd_get_section_size_before_reloc (asec);
1454 struct cleanup *old_chain;
1455 CORE_ADDR lma = bfd_section_lma (abfd, asec) + args->load_offset;
1456 bfd_size_type block_size;
1458 const char *sect_name = bfd_get_section_name (abfd, asec);
1461 if (download_write_size > 0 && size > download_write_size)
1462 block_size = download_write_size;
1466 buffer = xmalloc (size);
1467 old_chain = make_cleanup (xfree, buffer);
1469 /* Is this really necessary? I guess it gives the user something
1470 to look at during a long download. */
1471 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1472 sect_name, paddr_nz (size), paddr_nz (lma));
1474 bfd_get_section_contents (abfd, asec, buffer, 0, size);
1480 bfd_size_type this_transfer = size - sent;
1482 if (this_transfer >= block_size)
1483 this_transfer = block_size;
1484 len = target_write_memory_partial (lma, buffer,
1485 this_transfer, &err);
1488 if (validate_download)
1490 /* Broken memories and broken monitors manifest
1491 themselves here when bring new computers to
1492 life. This doubles already slow downloads. */
1493 /* NOTE: cagney/1999-10-18: A more efficient
1494 implementation might add a verify_memory()
1495 method to the target vector and then use
1496 that. remote.c could implement that method
1497 using the ``qCRC'' packet. */
1498 char *check = xmalloc (len);
1499 struct cleanup *verify_cleanups =
1500 make_cleanup (xfree, check);
1502 if (target_read_memory (lma, check, len) != 0)
1503 error ("Download verify read failed at 0x%s",
1505 if (memcmp (buffer, check, len) != 0)
1506 error ("Download verify compare failed at 0x%s",
1508 do_cleanups (verify_cleanups);
1510 args->data_count += len;
1513 args->write_count += 1;
1516 || (ui_load_progress_hook != NULL
1517 && ui_load_progress_hook (sect_name, sent)))
1518 error ("Canceled the download");
1520 if (show_load_progress != NULL)
1521 show_load_progress (sect_name, sent, size,
1522 args->data_count, args->total_size);
1524 while (sent < size);
1527 error ("Memory access error while loading section %s.", sect_name);
1529 do_cleanups (old_chain);
1535 generic_load (char *args, int from_tty)
1539 time_t start_time, end_time; /* Start and end times of download */
1541 struct cleanup *old_cleanups;
1543 struct load_section_data cbdata;
1546 cbdata.load_offset = 0; /* Offset to add to vma for each section. */
1547 cbdata.write_count = 0; /* Number of writes needed. */
1548 cbdata.data_count = 0; /* Number of bytes written to target memory. */
1549 cbdata.total_size = 0; /* Total size of all bfd sectors. */
1551 /* Parse the input argument - the user can specify a load offset as
1552 a second argument. */
1553 filename = xmalloc (strlen (args) + 1);
1554 old_cleanups = make_cleanup (xfree, filename);
1555 strcpy (filename, args);
1556 offptr = strchr (filename, ' ');
1561 cbdata.load_offset = strtoul (offptr, &endptr, 0);
1562 if (offptr == endptr)
1563 error ("Invalid download offset:%s\n", offptr);
1567 cbdata.load_offset = 0;
1569 /* Open the file for loading. */
1570 loadfile_bfd = bfd_openr (filename, gnutarget);
1571 if (loadfile_bfd == NULL)
1573 perror_with_name (filename);
1577 /* FIXME: should be checking for errors from bfd_close (for one thing,
1578 on error it does not free all the storage associated with the
1580 make_cleanup_bfd_close (loadfile_bfd);
1582 if (!bfd_check_format (loadfile_bfd, bfd_object))
1584 error ("\"%s\" is not an object file: %s", filename,
1585 bfd_errmsg (bfd_get_error ()));
1588 bfd_map_over_sections (loadfile_bfd, add_section_size_callback,
1589 (void *) &cbdata.total_size);
1591 start_time = time (NULL);
1593 bfd_map_over_sections (loadfile_bfd, load_section_callback, &cbdata);
1595 end_time = time (NULL);
1597 entry = bfd_get_start_address (loadfile_bfd);
1598 ui_out_text (uiout, "Start address ");
1599 ui_out_field_fmt (uiout, "address", "0x%s", paddr_nz (entry));
1600 ui_out_text (uiout, ", load size ");
1601 ui_out_field_fmt (uiout, "load-size", "%lu", cbdata.data_count);
1602 ui_out_text (uiout, "\n");
1603 /* We were doing this in remote-mips.c, I suspect it is right
1604 for other targets too. */
1607 /* FIXME: are we supposed to call symbol_file_add or not? According
1608 to a comment from remote-mips.c (where a call to symbol_file_add
1609 was commented out), making the call confuses GDB if more than one
1610 file is loaded in. Some targets do (e.g., remote-vx.c) but
1611 others don't (or didn't - perhaphs they have all been deleted). */
1613 print_transfer_performance (gdb_stdout, cbdata.data_count,
1614 cbdata.write_count, end_time - start_time);
1616 do_cleanups (old_cleanups);
1619 /* Report how fast the transfer went. */
1621 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1622 replaced by print_transfer_performance (with a very different
1623 function signature). */
1626 report_transfer_performance (unsigned long data_count, time_t start_time,
1629 print_transfer_performance (gdb_stdout, data_count,
1630 end_time - start_time, 0);
1634 print_transfer_performance (struct ui_file *stream,
1635 unsigned long data_count,
1636 unsigned long write_count,
1637 unsigned long time_count)
1639 ui_out_text (uiout, "Transfer rate: ");
1642 ui_out_field_fmt (uiout, "transfer-rate", "%lu",
1643 (data_count * 8) / time_count);
1644 ui_out_text (uiout, " bits/sec");
1648 ui_out_field_fmt (uiout, "transferred-bits", "%lu", (data_count * 8));
1649 ui_out_text (uiout, " bits in <1 sec");
1651 if (write_count > 0)
1653 ui_out_text (uiout, ", ");
1654 ui_out_field_fmt (uiout, "write-rate", "%lu", data_count / write_count);
1655 ui_out_text (uiout, " bytes/write");
1657 ui_out_text (uiout, ".\n");
1660 /* This function allows the addition of incrementally linked object files.
1661 It does not modify any state in the target, only in the debugger. */
1662 /* Note: ezannoni 2000-04-13 This function/command used to have a
1663 special case syntax for the rombug target (Rombug is the boot
1664 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1665 rombug case, the user doesn't need to supply a text address,
1666 instead a call to target_link() (in target.c) would supply the
1667 value to use. We are now discontinuing this type of ad hoc syntax. */
1671 add_symbol_file_command (char *args, int from_tty)
1673 char *filename = NULL;
1674 int flags = OBJF_USERLOADED;
1676 int expecting_option = 0;
1677 int section_index = 0;
1681 int expecting_sec_name = 0;
1682 int expecting_sec_addr = 0;
1690 struct section_addr_info *section_addrs;
1691 struct sect_opt *sect_opts = NULL;
1692 size_t num_sect_opts = 0;
1693 struct cleanup *my_cleanups = make_cleanup (null_cleanup, NULL);
1696 sect_opts = (struct sect_opt *) xmalloc (num_sect_opts
1697 * sizeof (struct sect_opt));
1702 error ("add-symbol-file takes a file name and an address");
1704 /* Make a copy of the string that we can safely write into. */
1705 args = xstrdup (args);
1707 while (*args != '\000')
1709 /* Any leading spaces? */
1710 while (isspace (*args))
1713 /* Point arg to the beginning of the argument. */
1716 /* Move args pointer over the argument. */
1717 while ((*args != '\000') && !isspace (*args))
1720 /* If there are more arguments, terminate arg and
1722 if (*args != '\000')
1725 /* Now process the argument. */
1728 /* The first argument is the file name. */
1729 filename = tilde_expand (arg);
1730 make_cleanup (xfree, filename);
1735 /* The second argument is always the text address at which
1736 to load the program. */
1737 sect_opts[section_index].name = ".text";
1738 sect_opts[section_index].value = arg;
1739 if (++section_index > num_sect_opts)
1742 sect_opts = ((struct sect_opt *)
1743 xrealloc (sect_opts,
1745 * sizeof (struct sect_opt)));
1750 /* It's an option (starting with '-') or it's an argument
1755 if (strcmp (arg, "-mapped") == 0)
1756 flags |= OBJF_MAPPED;
1758 if (strcmp (arg, "-readnow") == 0)
1759 flags |= OBJF_READNOW;
1761 if (strcmp (arg, "-s") == 0)
1763 expecting_sec_name = 1;
1764 expecting_sec_addr = 1;
1769 if (expecting_sec_name)
1771 sect_opts[section_index].name = arg;
1772 expecting_sec_name = 0;
1775 if (expecting_sec_addr)
1777 sect_opts[section_index].value = arg;
1778 expecting_sec_addr = 0;
1779 if (++section_index > num_sect_opts)
1782 sect_opts = ((struct sect_opt *)
1783 xrealloc (sect_opts,
1785 * sizeof (struct sect_opt)));
1789 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1795 /* Print the prompt for the query below. And save the arguments into
1796 a sect_addr_info structure to be passed around to other
1797 functions. We have to split this up into separate print
1798 statements because local_hex_string returns a local static
1801 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1802 section_addrs = alloc_section_addr_info (section_index);
1803 make_cleanup (xfree, section_addrs);
1804 for (i = 0; i < section_index; i++)
1807 char *val = sect_opts[i].value;
1808 char *sec = sect_opts[i].name;
1810 addr = parse_and_eval_address (val);
1812 /* Here we store the section offsets in the order they were
1813 entered on the command line. */
1814 section_addrs->other[sec_num].name = sec;
1815 section_addrs->other[sec_num].addr = addr;
1816 printf_filtered ("\t%s_addr = %s\n",
1818 local_hex_string ((unsigned long)addr));
1821 /* The object's sections are initialized when a
1822 call is made to build_objfile_section_table (objfile).
1823 This happens in reread_symbols.
1824 At this point, we don't know what file type this is,
1825 so we can't determine what section names are valid. */
1828 if (from_tty && (!query ("%s", "")))
1829 error ("Not confirmed.");
1831 symbol_file_add (filename, from_tty, section_addrs, 0, flags);
1833 /* Getting new symbols may change our opinion about what is
1835 reinit_frame_cache ();
1836 do_cleanups (my_cleanups);
1840 add_shared_symbol_files_command (char *args, int from_tty)
1842 #ifdef ADD_SHARED_SYMBOL_FILES
1843 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1845 error ("This command is not available in this configuration of GDB.");
1849 /* Re-read symbols if a symbol-file has changed. */
1851 reread_symbols (void)
1853 struct objfile *objfile;
1856 struct stat new_statbuf;
1859 /* With the addition of shared libraries, this should be modified,
1860 the load time should be saved in the partial symbol tables, since
1861 different tables may come from different source files. FIXME.
1862 This routine should then walk down each partial symbol table
1863 and see if the symbol table that it originates from has been changed */
1865 for (objfile = object_files; objfile; objfile = objfile->next)
1869 #ifdef DEPRECATED_IBM6000_TARGET
1870 /* If this object is from a shared library, then you should
1871 stat on the library name, not member name. */
1873 if (objfile->obfd->my_archive)
1874 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1877 res = stat (objfile->name, &new_statbuf);
1880 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1881 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1885 new_modtime = new_statbuf.st_mtime;
1886 if (new_modtime != objfile->mtime)
1888 struct cleanup *old_cleanups;
1889 struct section_offsets *offsets;
1891 char *obfd_filename;
1893 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1896 /* There are various functions like symbol_file_add,
1897 symfile_bfd_open, syms_from_objfile, etc., which might
1898 appear to do what we want. But they have various other
1899 effects which we *don't* want. So we just do stuff
1900 ourselves. We don't worry about mapped files (for one thing,
1901 any mapped file will be out of date). */
1903 /* If we get an error, blow away this objfile (not sure if
1904 that is the correct response for things like shared
1906 old_cleanups = make_cleanup_free_objfile (objfile);
1907 /* We need to do this whenever any symbols go away. */
1908 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1910 /* Clean up any state BFD has sitting around. We don't need
1911 to close the descriptor but BFD lacks a way of closing the
1912 BFD without closing the descriptor. */
1913 obfd_filename = bfd_get_filename (objfile->obfd);
1914 if (!bfd_close (objfile->obfd))
1915 error ("Can't close BFD for %s: %s", objfile->name,
1916 bfd_errmsg (bfd_get_error ()));
1917 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1918 if (objfile->obfd == NULL)
1919 error ("Can't open %s to read symbols.", objfile->name);
1920 /* bfd_openr sets cacheable to true, which is what we want. */
1921 if (!bfd_check_format (objfile->obfd, bfd_object))
1922 error ("Can't read symbols from %s: %s.", objfile->name,
1923 bfd_errmsg (bfd_get_error ()));
1925 /* Save the offsets, we will nuke them with the rest of the
1927 num_offsets = objfile->num_sections;
1928 offsets = ((struct section_offsets *)
1929 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets)));
1930 memcpy (offsets, objfile->section_offsets,
1931 SIZEOF_N_SECTION_OFFSETS (num_offsets));
1933 /* Nuke all the state that we will re-read. Much of the following
1934 code which sets things to NULL really is necessary to tell
1935 other parts of GDB that there is nothing currently there. */
1937 /* FIXME: Do we have to free a whole linked list, or is this
1939 if (objfile->global_psymbols.list)
1940 xmfree (objfile->md, objfile->global_psymbols.list);
1941 memset (&objfile->global_psymbols, 0,
1942 sizeof (objfile->global_psymbols));
1943 if (objfile->static_psymbols.list)
1944 xmfree (objfile->md, objfile->static_psymbols.list);
1945 memset (&objfile->static_psymbols, 0,
1946 sizeof (objfile->static_psymbols));
1948 /* Free the obstacks for non-reusable objfiles */
1949 bcache_xfree (objfile->psymbol_cache);
1950 objfile->psymbol_cache = bcache_xmalloc ();
1951 bcache_xfree (objfile->macro_cache);
1952 objfile->macro_cache = bcache_xmalloc ();
1953 if (objfile->demangled_names_hash != NULL)
1955 htab_delete (objfile->demangled_names_hash);
1956 objfile->demangled_names_hash = NULL;
1958 obstack_free (&objfile->psymbol_obstack, 0);
1959 obstack_free (&objfile->symbol_obstack, 0);
1960 obstack_free (&objfile->type_obstack, 0);
1961 objfile->sections = NULL;
1962 objfile->symtabs = NULL;
1963 objfile->psymtabs = NULL;
1964 objfile->free_psymtabs = NULL;
1965 objfile->msymbols = NULL;
1966 objfile->sym_private = NULL;
1967 objfile->minimal_symbol_count = 0;
1968 memset (&objfile->msymbol_hash, 0,
1969 sizeof (objfile->msymbol_hash));
1970 memset (&objfile->msymbol_demangled_hash, 0,
1971 sizeof (objfile->msymbol_demangled_hash));
1972 objfile->fundamental_types = NULL;
1973 if (objfile->sf != NULL)
1975 (*objfile->sf->sym_finish) (objfile);
1978 /* We never make this a mapped file. */
1980 /* obstack_specify_allocation also initializes the obstack so
1982 objfile->psymbol_cache = bcache_xmalloc ();
1983 objfile->macro_cache = bcache_xmalloc ();
1984 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1986 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1988 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1990 if (build_objfile_section_table (objfile))
1992 error ("Can't find the file sections in `%s': %s",
1993 objfile->name, bfd_errmsg (bfd_get_error ()));
1995 terminate_minimal_symbol_table (objfile);
1997 /* We use the same section offsets as from last time. I'm not
1998 sure whether that is always correct for shared libraries. */
1999 objfile->section_offsets = (struct section_offsets *)
2000 obstack_alloc (&objfile->psymbol_obstack,
2001 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2002 memcpy (objfile->section_offsets, offsets,
2003 SIZEOF_N_SECTION_OFFSETS (num_offsets));
2004 objfile->num_sections = num_offsets;
2006 /* What the hell is sym_new_init for, anyway? The concept of
2007 distinguishing between the main file and additional files
2008 in this way seems rather dubious. */
2009 if (objfile == symfile_objfile)
2011 (*objfile->sf->sym_new_init) (objfile);
2013 RESET_HP_UX_GLOBALS ();
2017 (*objfile->sf->sym_init) (objfile);
2018 clear_complaints (&symfile_complaints, 1, 1);
2019 /* The "mainline" parameter is a hideous hack; I think leaving it
2020 zero is OK since dbxread.c also does what it needs to do if
2021 objfile->global_psymbols.size is 0. */
2022 (*objfile->sf->sym_read) (objfile, 0);
2023 if (!have_partial_symbols () && !have_full_symbols ())
2026 printf_filtered ("(no debugging symbols found)\n");
2029 objfile->flags |= OBJF_SYMS;
2031 /* We're done reading the symbol file; finish off complaints. */
2032 clear_complaints (&symfile_complaints, 0, 1);
2034 /* Getting new symbols may change our opinion about what is
2037 reinit_frame_cache ();
2039 /* Discard cleanups as symbol reading was successful. */
2040 discard_cleanups (old_cleanups);
2042 /* If the mtime has changed between the time we set new_modtime
2043 and now, we *want* this to be out of date, so don't call stat
2045 objfile->mtime = new_modtime;
2047 reread_separate_symbols (objfile);
2053 clear_symtab_users ();
2057 /* Handle separate debug info for OBJFILE, which has just been
2059 - If we had separate debug info before, but now we don't, get rid
2060 of the separated objfile.
2061 - If we didn't have separated debug info before, but now we do,
2062 read in the new separated debug info file.
2063 - If the debug link points to a different file, toss the old one
2064 and read the new one.
2065 This function does *not* handle the case where objfile is still
2066 using the same separate debug info file, but that file's timestamp
2067 has changed. That case should be handled by the loop in
2068 reread_symbols already. */
2070 reread_separate_symbols (struct objfile *objfile)
2073 unsigned long crc32;
2075 /* Does the updated objfile's debug info live in a
2077 debug_file = find_separate_debug_file (objfile);
2079 if (objfile->separate_debug_objfile)
2081 /* There are two cases where we need to get rid of
2082 the old separated debug info objfile:
2083 - if the new primary objfile doesn't have
2084 separated debug info, or
2085 - if the new primary objfile has separate debug
2086 info, but it's under a different filename.
2088 If the old and new objfiles both have separate
2089 debug info, under the same filename, then we're
2090 okay --- if the separated file's contents have
2091 changed, we will have caught that when we
2092 visited it in this function's outermost
2095 || strcmp (debug_file, objfile->separate_debug_objfile->name) != 0)
2096 free_objfile (objfile->separate_debug_objfile);
2099 /* If the new objfile has separate debug info, and we
2100 haven't loaded it already, do so now. */
2102 && ! objfile->separate_debug_objfile)
2104 /* Use the same section offset table as objfile itself.
2105 Preserve the flags from objfile that make sense. */
2106 objfile->separate_debug_objfile
2107 = (symbol_file_add_with_addrs_or_offsets
2109 info_verbose, /* from_tty: Don't override the default. */
2110 0, /* No addr table. */
2111 objfile->section_offsets, objfile->num_sections,
2112 0, /* Not mainline. See comments about this above. */
2113 objfile->flags & (OBJF_MAPPED | OBJF_REORDERED
2114 | OBJF_SHARED | OBJF_READNOW
2115 | OBJF_USERLOADED)));
2116 objfile->separate_debug_objfile->separate_debug_objfile_backlink
2132 static filename_language *filename_language_table;
2133 static int fl_table_size, fl_table_next;
2136 add_filename_language (char *ext, enum language lang)
2138 if (fl_table_next >= fl_table_size)
2140 fl_table_size += 10;
2141 filename_language_table =
2142 xrealloc (filename_language_table,
2143 fl_table_size * sizeof (*filename_language_table));
2146 filename_language_table[fl_table_next].ext = xstrdup (ext);
2147 filename_language_table[fl_table_next].lang = lang;
2151 static char *ext_args;
2154 set_ext_lang_command (char *args, int from_tty)
2157 char *cp = ext_args;
2160 /* First arg is filename extension, starting with '.' */
2162 error ("'%s': Filename extension must begin with '.'", ext_args);
2164 /* Find end of first arg. */
2165 while (*cp && !isspace (*cp))
2169 error ("'%s': two arguments required -- filename extension and language",
2172 /* Null-terminate first arg */
2175 /* Find beginning of second arg, which should be a source language. */
2176 while (*cp && isspace (*cp))
2180 error ("'%s': two arguments required -- filename extension and language",
2183 /* Lookup the language from among those we know. */
2184 lang = language_enum (cp);
2186 /* Now lookup the filename extension: do we already know it? */
2187 for (i = 0; i < fl_table_next; i++)
2188 if (0 == strcmp (ext_args, filename_language_table[i].ext))
2191 if (i >= fl_table_next)
2193 /* new file extension */
2194 add_filename_language (ext_args, lang);
2198 /* redefining a previously known filename extension */
2201 /* query ("Really make files of type %s '%s'?", */
2202 /* ext_args, language_str (lang)); */
2204 xfree (filename_language_table[i].ext);
2205 filename_language_table[i].ext = xstrdup (ext_args);
2206 filename_language_table[i].lang = lang;
2211 info_ext_lang_command (char *args, int from_tty)
2215 printf_filtered ("Filename extensions and the languages they represent:");
2216 printf_filtered ("\n\n");
2217 for (i = 0; i < fl_table_next; i++)
2218 printf_filtered ("\t%s\t- %s\n",
2219 filename_language_table[i].ext,
2220 language_str (filename_language_table[i].lang));
2224 init_filename_language_table (void)
2226 if (fl_table_size == 0) /* protect against repetition */
2230 filename_language_table =
2231 xmalloc (fl_table_size * sizeof (*filename_language_table));
2232 add_filename_language (".c", language_c);
2233 add_filename_language (".C", language_cplus);
2234 add_filename_language (".cc", language_cplus);
2235 add_filename_language (".cp", language_cplus);
2236 add_filename_language (".cpp", language_cplus);
2237 add_filename_language (".cxx", language_cplus);
2238 add_filename_language (".c++", language_cplus);
2239 add_filename_language (".java", language_java);
2240 add_filename_language (".class", language_java);
2241 add_filename_language (".m", language_objc);
2242 add_filename_language (".f", language_fortran);
2243 add_filename_language (".F", language_fortran);
2244 add_filename_language (".s", language_asm);
2245 add_filename_language (".S", language_asm);
2246 add_filename_language (".pas", language_pascal);
2247 add_filename_language (".p", language_pascal);
2248 add_filename_language (".pp", language_pascal);
2253 deduce_language_from_filename (char *filename)
2258 if (filename != NULL)
2259 if ((cp = strrchr (filename, '.')) != NULL)
2260 for (i = 0; i < fl_table_next; i++)
2261 if (strcmp (cp, filename_language_table[i].ext) == 0)
2262 return filename_language_table[i].lang;
2264 return language_unknown;
2269 Allocate and partly initialize a new symbol table. Return a pointer
2270 to it. error() if no space.
2272 Caller must set these fields:
2278 possibly free_named_symtabs (symtab->filename);
2282 allocate_symtab (char *filename, struct objfile *objfile)
2284 register struct symtab *symtab;
2286 symtab = (struct symtab *)
2287 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
2288 memset (symtab, 0, sizeof (*symtab));
2289 symtab->filename = obsavestring (filename, strlen (filename),
2290 &objfile->symbol_obstack);
2291 symtab->fullname = NULL;
2292 symtab->language = deduce_language_from_filename (filename);
2293 symtab->debugformat = obsavestring ("unknown", 7,
2294 &objfile->symbol_obstack);
2296 /* Hook it to the objfile it comes from */
2298 symtab->objfile = objfile;
2299 symtab->next = objfile->symtabs;
2300 objfile->symtabs = symtab;
2302 /* FIXME: This should go away. It is only defined for the Z8000,
2303 and the Z8000 definition of this macro doesn't have anything to
2304 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
2305 here for convenience. */
2306 #ifdef INIT_EXTRA_SYMTAB_INFO
2307 INIT_EXTRA_SYMTAB_INFO (symtab);
2313 struct partial_symtab *
2314 allocate_psymtab (char *filename, struct objfile *objfile)
2316 struct partial_symtab *psymtab;
2318 if (objfile->free_psymtabs)
2320 psymtab = objfile->free_psymtabs;
2321 objfile->free_psymtabs = psymtab->next;
2324 psymtab = (struct partial_symtab *)
2325 obstack_alloc (&objfile->psymbol_obstack,
2326 sizeof (struct partial_symtab));
2328 memset (psymtab, 0, sizeof (struct partial_symtab));
2329 psymtab->filename = obsavestring (filename, strlen (filename),
2330 &objfile->psymbol_obstack);
2331 psymtab->symtab = NULL;
2333 /* Prepend it to the psymtab list for the objfile it belongs to.
2334 Psymtabs are searched in most recent inserted -> least recent
2337 psymtab->objfile = objfile;
2338 psymtab->next = objfile->psymtabs;
2339 objfile->psymtabs = psymtab;
2342 struct partial_symtab **prev_pst;
2343 psymtab->objfile = objfile;
2344 psymtab->next = NULL;
2345 prev_pst = &(objfile->psymtabs);
2346 while ((*prev_pst) != NULL)
2347 prev_pst = &((*prev_pst)->next);
2348 (*prev_pst) = psymtab;
2356 discard_psymtab (struct partial_symtab *pst)
2358 struct partial_symtab **prev_pst;
2361 Empty psymtabs happen as a result of header files which don't
2362 have any symbols in them. There can be a lot of them. But this
2363 check is wrong, in that a psymtab with N_SLINE entries but
2364 nothing else is not empty, but we don't realize that. Fixing
2365 that without slowing things down might be tricky. */
2367 /* First, snip it out of the psymtab chain */
2369 prev_pst = &(pst->objfile->psymtabs);
2370 while ((*prev_pst) != pst)
2371 prev_pst = &((*prev_pst)->next);
2372 (*prev_pst) = pst->next;
2374 /* Next, put it on a free list for recycling */
2376 pst->next = pst->objfile->free_psymtabs;
2377 pst->objfile->free_psymtabs = pst;
2381 /* Reset all data structures in gdb which may contain references to symbol
2385 clear_symtab_users (void)
2387 /* Someday, we should do better than this, by only blowing away
2388 the things that really need to be blown. */
2389 clear_value_history ();
2391 clear_internalvars ();
2392 breakpoint_re_set ();
2393 set_default_breakpoint (0, 0, 0, 0);
2394 clear_current_source_symtab_and_line ();
2395 clear_pc_function_cache ();
2396 if (target_new_objfile_hook)
2397 target_new_objfile_hook (NULL);
2401 clear_symtab_users_cleanup (void *ignore)
2403 clear_symtab_users ();
2406 /* clear_symtab_users_once:
2408 This function is run after symbol reading, or from a cleanup.
2409 If an old symbol table was obsoleted, the old symbol table
2410 has been blown away, but the other GDB data structures that may
2411 reference it have not yet been cleared or re-directed. (The old
2412 symtab was zapped, and the cleanup queued, in free_named_symtab()
2415 This function can be queued N times as a cleanup, or called
2416 directly; it will do all the work the first time, and then will be a
2417 no-op until the next time it is queued. This works by bumping a
2418 counter at queueing time. Much later when the cleanup is run, or at
2419 the end of symbol processing (in case the cleanup is discarded), if
2420 the queued count is greater than the "done-count", we do the work
2421 and set the done-count to the queued count. If the queued count is
2422 less than or equal to the done-count, we just ignore the call. This
2423 is needed because reading a single .o file will often replace many
2424 symtabs (one per .h file, for example), and we don't want to reset
2425 the breakpoints N times in the user's face.
2427 The reason we both queue a cleanup, and call it directly after symbol
2428 reading, is because the cleanup protects us in case of errors, but is
2429 discarded if symbol reading is successful. */
2432 /* FIXME: As free_named_symtabs is currently a big noop this function
2433 is no longer needed. */
2434 static void clear_symtab_users_once (void);
2436 static int clear_symtab_users_queued;
2437 static int clear_symtab_users_done;
2440 clear_symtab_users_once (void)
2442 /* Enforce once-per-`do_cleanups'-semantics */
2443 if (clear_symtab_users_queued <= clear_symtab_users_done)
2445 clear_symtab_users_done = clear_symtab_users_queued;
2447 clear_symtab_users ();
2451 /* Delete the specified psymtab, and any others that reference it. */
2454 cashier_psymtab (struct partial_symtab *pst)
2456 struct partial_symtab *ps, *pprev = NULL;
2459 /* Find its previous psymtab in the chain */
2460 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2469 /* Unhook it from the chain. */
2470 if (ps == pst->objfile->psymtabs)
2471 pst->objfile->psymtabs = ps->next;
2473 pprev->next = ps->next;
2475 /* FIXME, we can't conveniently deallocate the entries in the
2476 partial_symbol lists (global_psymbols/static_psymbols) that
2477 this psymtab points to. These just take up space until all
2478 the psymtabs are reclaimed. Ditto the dependencies list and
2479 filename, which are all in the psymbol_obstack. */
2481 /* We need to cashier any psymtab that has this one as a dependency... */
2483 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2485 for (i = 0; i < ps->number_of_dependencies; i++)
2487 if (ps->dependencies[i] == pst)
2489 cashier_psymtab (ps);
2490 goto again; /* Must restart, chain has been munged. */
2497 /* If a symtab or psymtab for filename NAME is found, free it along
2498 with any dependent breakpoints, displays, etc.
2499 Used when loading new versions of object modules with the "add-file"
2500 command. This is only called on the top-level symtab or psymtab's name;
2501 it is not called for subsidiary files such as .h files.
2503 Return value is 1 if we blew away the environment, 0 if not.
2504 FIXME. The return value appears to never be used.
2506 FIXME. I think this is not the best way to do this. We should
2507 work on being gentler to the environment while still cleaning up
2508 all stray pointers into the freed symtab. */
2511 free_named_symtabs (char *name)
2514 /* FIXME: With the new method of each objfile having it's own
2515 psymtab list, this function needs serious rethinking. In particular,
2516 why was it ever necessary to toss psymtabs with specific compilation
2517 unit filenames, as opposed to all psymtabs from a particular symbol
2519 Well, the answer is that some systems permit reloading of particular
2520 compilation units. We want to blow away any old info about these
2521 compilation units, regardless of which objfiles they arrived in. --gnu. */
2523 register struct symtab *s;
2524 register struct symtab *prev;
2525 register struct partial_symtab *ps;
2526 struct blockvector *bv;
2529 /* We only wack things if the symbol-reload switch is set. */
2530 if (!symbol_reloading)
2533 /* Some symbol formats have trouble providing file names... */
2534 if (name == 0 || *name == '\0')
2537 /* Look for a psymtab with the specified name. */
2540 for (ps = partial_symtab_list; ps; ps = ps->next)
2542 if (STREQ (name, ps->filename))
2544 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2545 goto again2; /* Must restart, chain has been munged */
2549 /* Look for a symtab with the specified name. */
2551 for (s = symtab_list; s; s = s->next)
2553 if (STREQ (name, s->filename))
2560 if (s == symtab_list)
2561 symtab_list = s->next;
2563 prev->next = s->next;
2565 /* For now, queue a delete for all breakpoints, displays, etc., whether
2566 or not they depend on the symtab being freed. This should be
2567 changed so that only those data structures affected are deleted. */
2569 /* But don't delete anything if the symtab is empty.
2570 This test is necessary due to a bug in "dbxread.c" that
2571 causes empty symtabs to be created for N_SO symbols that
2572 contain the pathname of the object file. (This problem
2573 has been fixed in GDB 3.9x). */
2575 bv = BLOCKVECTOR (s);
2576 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2577 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2578 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2580 complaint (&symfile_complaints, "Replacing old symbols for `%s'",
2582 clear_symtab_users_queued++;
2583 make_cleanup (clear_symtab_users_once, 0);
2588 complaint (&symfile_complaints, "Empty symbol table found for `%s'",
2596 /* It is still possible that some breakpoints will be affected
2597 even though no symtab was found, since the file might have
2598 been compiled without debugging, and hence not be associated
2599 with a symtab. In order to handle this correctly, we would need
2600 to keep a list of text address ranges for undebuggable files.
2601 For now, we do nothing, since this is a fairly obscure case. */
2605 /* FIXME, what about the minimal symbol table? */
2612 /* Allocate and partially fill a partial symtab. It will be
2613 completely filled at the end of the symbol list.
2615 FILENAME is the name of the symbol-file we are reading from. */
2617 struct partial_symtab *
2618 start_psymtab_common (struct objfile *objfile,
2619 struct section_offsets *section_offsets, char *filename,
2620 CORE_ADDR textlow, struct partial_symbol **global_syms,
2621 struct partial_symbol **static_syms)
2623 struct partial_symtab *psymtab;
2625 psymtab = allocate_psymtab (filename, objfile);
2626 psymtab->section_offsets = section_offsets;
2627 psymtab->textlow = textlow;
2628 psymtab->texthigh = psymtab->textlow; /* default */
2629 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2630 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2634 /* Add a symbol with a long value to a psymtab.
2635 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2638 add_psymbol_to_list (char *name, int namelength, domain_enum domain,
2639 enum address_class class,
2640 struct psymbol_allocation_list *list, long val, /* Value as a long */
2641 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2642 enum language language, struct objfile *objfile)
2644 register struct partial_symbol *psym;
2645 char *buf = alloca (namelength + 1);
2646 /* psymbol is static so that there will be no uninitialized gaps in the
2647 structure which might contain random data, causing cache misses in
2649 static struct partial_symbol psymbol;
2651 /* Create local copy of the partial symbol */
2652 memcpy (buf, name, namelength);
2653 buf[namelength] = '\0';
2654 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2657 SYMBOL_VALUE (&psymbol) = val;
2661 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2663 SYMBOL_SECTION (&psymbol) = 0;
2664 SYMBOL_LANGUAGE (&psymbol) = language;
2665 PSYMBOL_DOMAIN (&psymbol) = domain;
2666 PSYMBOL_CLASS (&psymbol) = class;
2668 SYMBOL_SET_NAMES (&psymbol, buf, namelength, objfile);
2670 /* Stash the partial symbol away in the cache */
2671 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2673 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2674 if (list->next >= list->list + list->size)
2676 extend_psymbol_list (list, objfile);
2678 *list->next++ = psym;
2679 OBJSTAT (objfile, n_psyms++);
2682 /* Add a symbol with a long value to a psymtab. This differs from
2683 * add_psymbol_to_list above in taking both a mangled and a demangled
2687 add_psymbol_with_dem_name_to_list (char *name, int namelength, char *dem_name,
2688 int dem_namelength, domain_enum domain,
2689 enum address_class class,
2690 struct psymbol_allocation_list *list, long val, /* Value as a long */
2691 CORE_ADDR coreaddr, /* Value as a CORE_ADDR */
2692 enum language language,
2693 struct objfile *objfile)
2695 register struct partial_symbol *psym;
2696 char *buf = alloca (namelength + 1);
2697 /* psymbol is static so that there will be no uninitialized gaps in the
2698 structure which might contain random data, causing cache misses in
2700 static struct partial_symbol psymbol;
2702 /* Create local copy of the partial symbol */
2704 memcpy (buf, name, namelength);
2705 buf[namelength] = '\0';
2706 DEPRECATED_SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, objfile->psymbol_cache);
2708 buf = alloca (dem_namelength + 1);
2709 memcpy (buf, dem_name, dem_namelength);
2710 buf[dem_namelength] = '\0';
2715 case language_cplus:
2716 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2717 bcache (buf, dem_namelength + 1, objfile->psymbol_cache);
2719 /* FIXME What should be done for the default case? Ignoring for now. */
2722 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2725 SYMBOL_VALUE (&psymbol) = val;
2729 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2731 SYMBOL_SECTION (&psymbol) = 0;
2732 SYMBOL_LANGUAGE (&psymbol) = language;
2733 PSYMBOL_DOMAIN (&psymbol) = domain;
2734 PSYMBOL_CLASS (&psymbol) = class;
2735 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2737 /* Stash the partial symbol away in the cache */
2738 psym = bcache (&psymbol, sizeof (struct partial_symbol), objfile->psymbol_cache);
2740 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2741 if (list->next >= list->list + list->size)
2743 extend_psymbol_list (list, objfile);
2745 *list->next++ = psym;
2746 OBJSTAT (objfile, n_psyms++);
2749 /* Initialize storage for partial symbols. */
2752 init_psymbol_list (struct objfile *objfile, int total_symbols)
2754 /* Free any previously allocated psymbol lists. */
2756 if (objfile->global_psymbols.list)
2758 xmfree (objfile->md, objfile->global_psymbols.list);
2760 if (objfile->static_psymbols.list)
2762 xmfree (objfile->md, objfile->static_psymbols.list);
2765 /* Current best guess is that approximately a twentieth
2766 of the total symbols (in a debugging file) are global or static
2769 objfile->global_psymbols.size = total_symbols / 10;
2770 objfile->static_psymbols.size = total_symbols / 10;
2772 if (objfile->global_psymbols.size > 0)
2774 objfile->global_psymbols.next =
2775 objfile->global_psymbols.list = (struct partial_symbol **)
2776 xmmalloc (objfile->md, (objfile->global_psymbols.size
2777 * sizeof (struct partial_symbol *)));
2779 if (objfile->static_psymbols.size > 0)
2781 objfile->static_psymbols.next =
2782 objfile->static_psymbols.list = (struct partial_symbol **)
2783 xmmalloc (objfile->md, (objfile->static_psymbols.size
2784 * sizeof (struct partial_symbol *)));
2789 The following code implements an abstraction for debugging overlay sections.
2791 The target model is as follows:
2792 1) The gnu linker will permit multiple sections to be mapped into the
2793 same VMA, each with its own unique LMA (or load address).
2794 2) It is assumed that some runtime mechanism exists for mapping the
2795 sections, one by one, from the load address into the VMA address.
2796 3) This code provides a mechanism for gdb to keep track of which
2797 sections should be considered to be mapped from the VMA to the LMA.
2798 This information is used for symbol lookup, and memory read/write.
2799 For instance, if a section has been mapped then its contents
2800 should be read from the VMA, otherwise from the LMA.
2802 Two levels of debugger support for overlays are available. One is
2803 "manual", in which the debugger relies on the user to tell it which
2804 overlays are currently mapped. This level of support is
2805 implemented entirely in the core debugger, and the information about
2806 whether a section is mapped is kept in the objfile->obj_section table.
2808 The second level of support is "automatic", and is only available if
2809 the target-specific code provides functionality to read the target's
2810 overlay mapping table, and translate its contents for the debugger
2811 (by updating the mapped state information in the obj_section tables).
2813 The interface is as follows:
2815 overlay map <name> -- tell gdb to consider this section mapped
2816 overlay unmap <name> -- tell gdb to consider this section unmapped
2817 overlay list -- list the sections that GDB thinks are mapped
2818 overlay read-target -- get the target's state of what's mapped
2819 overlay off/manual/auto -- set overlay debugging state
2820 Functional interface:
2821 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2822 section, return that section.
2823 find_pc_overlay(pc): find any overlay section that contains
2824 the pc, either in its VMA or its LMA
2825 overlay_is_mapped(sect): true if overlay is marked as mapped
2826 section_is_overlay(sect): true if section's VMA != LMA
2827 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2828 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2829 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
2830 overlay_mapped_address(...): map an address from section's LMA to VMA
2831 overlay_unmapped_address(...): map an address from section's VMA to LMA
2832 symbol_overlayed_address(...): Return a "current" address for symbol:
2833 either in VMA or LMA depending on whether
2834 the symbol's section is currently mapped
2837 /* Overlay debugging state: */
2839 enum overlay_debugging_state overlay_debugging = ovly_off;
2840 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2842 /* Target vector for refreshing overlay mapped state */
2843 static void simple_overlay_update (struct obj_section *);
2844 void (*target_overlay_update) (struct obj_section *) = simple_overlay_update;
2846 /* Function: section_is_overlay (SECTION)
2847 Returns true if SECTION has VMA not equal to LMA, ie.
2848 SECTION is loaded at an address different from where it will "run". */
2851 section_is_overlay (asection *section)
2853 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2855 if (overlay_debugging)
2856 if (section && section->lma != 0 &&
2857 section->vma != section->lma)
2863 /* Function: overlay_invalidate_all (void)
2864 Invalidate the mapped state of all overlay sections (mark it as stale). */
2867 overlay_invalidate_all (void)
2869 struct objfile *objfile;
2870 struct obj_section *sect;
2872 ALL_OBJSECTIONS (objfile, sect)
2873 if (section_is_overlay (sect->the_bfd_section))
2874 sect->ovly_mapped = -1;
2877 /* Function: overlay_is_mapped (SECTION)
2878 Returns true if section is an overlay, and is currently mapped.
2879 Private: public access is thru function section_is_mapped.
2881 Access to the ovly_mapped flag is restricted to this function, so
2882 that we can do automatic update. If the global flag
2883 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2884 overlay_invalidate_all. If the mapped state of the particular
2885 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2888 overlay_is_mapped (struct obj_section *osect)
2890 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2893 switch (overlay_debugging)
2897 return 0; /* overlay debugging off */
2898 case ovly_auto: /* overlay debugging automatic */
2899 /* Unles there is a target_overlay_update function,
2900 there's really nothing useful to do here (can't really go auto) */
2901 if (target_overlay_update)
2903 if (overlay_cache_invalid)
2905 overlay_invalidate_all ();
2906 overlay_cache_invalid = 0;
2908 if (osect->ovly_mapped == -1)
2909 (*target_overlay_update) (osect);
2911 /* fall thru to manual case */
2912 case ovly_on: /* overlay debugging manual */
2913 return osect->ovly_mapped == 1;
2917 /* Function: section_is_mapped
2918 Returns true if section is an overlay, and is currently mapped. */
2921 section_is_mapped (asection *section)
2923 struct objfile *objfile;
2924 struct obj_section *osect;
2926 if (overlay_debugging)
2927 if (section && section_is_overlay (section))
2928 ALL_OBJSECTIONS (objfile, osect)
2929 if (osect->the_bfd_section == section)
2930 return overlay_is_mapped (osect);
2935 /* Function: pc_in_unmapped_range
2936 If PC falls into the lma range of SECTION, return true, else false. */
2939 pc_in_unmapped_range (CORE_ADDR pc, asection *section)
2941 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
2945 if (overlay_debugging)
2946 if (section && section_is_overlay (section))
2948 size = bfd_get_section_size_before_reloc (section);
2949 if (section->lma <= pc && pc < section->lma + size)
2955 /* Function: pc_in_mapped_range
2956 If PC falls into the vma range of SECTION, return true, else false. */
2959 pc_in_mapped_range (CORE_ADDR pc, asection *section)
2961 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2965 if (overlay_debugging)
2966 if (section && section_is_overlay (section))
2968 size = bfd_get_section_size_before_reloc (section);
2969 if (section->vma <= pc && pc < section->vma + size)
2976 /* Return true if the mapped ranges of sections A and B overlap, false
2979 sections_overlap (asection *a, asection *b)
2981 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
2983 CORE_ADDR a_start = a->vma;
2984 CORE_ADDR a_end = a->vma + bfd_get_section_size_before_reloc (a);
2985 CORE_ADDR b_start = b->vma;
2986 CORE_ADDR b_end = b->vma + bfd_get_section_size_before_reloc (b);
2988 return (a_start < b_end && b_start < a_end);
2991 /* Function: overlay_unmapped_address (PC, SECTION)
2992 Returns the address corresponding to PC in the unmapped (load) range.
2993 May be the same as PC. */
2996 overlay_unmapped_address (CORE_ADDR pc, asection *section)
2998 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3000 if (overlay_debugging)
3001 if (section && section_is_overlay (section) &&
3002 pc_in_mapped_range (pc, section))
3003 return pc + section->lma - section->vma;
3008 /* Function: overlay_mapped_address (PC, SECTION)
3009 Returns the address corresponding to PC in the mapped (runtime) range.
3010 May be the same as PC. */
3013 overlay_mapped_address (CORE_ADDR pc, asection *section)
3015 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3017 if (overlay_debugging)
3018 if (section && section_is_overlay (section) &&
3019 pc_in_unmapped_range (pc, section))
3020 return pc + section->vma - section->lma;
3026 /* Function: symbol_overlayed_address
3027 Return one of two addresses (relative to the VMA or to the LMA),
3028 depending on whether the section is mapped or not. */
3031 symbol_overlayed_address (CORE_ADDR address, asection *section)
3033 if (overlay_debugging)
3035 /* If the symbol has no section, just return its regular address. */
3038 /* If the symbol's section is not an overlay, just return its address */
3039 if (!section_is_overlay (section))
3041 /* If the symbol's section is mapped, just return its address */
3042 if (section_is_mapped (section))
3045 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3046 * then return its LOADED address rather than its vma address!!
3048 return overlay_unmapped_address (address, section);
3053 /* Function: find_pc_overlay (PC)
3054 Return the best-match overlay section for PC:
3055 If PC matches a mapped overlay section's VMA, return that section.
3056 Else if PC matches an unmapped section's VMA, return that section.
3057 Else if PC matches an unmapped section's LMA, return that section. */
3060 find_pc_overlay (CORE_ADDR pc)
3062 struct objfile *objfile;
3063 struct obj_section *osect, *best_match = NULL;
3065 if (overlay_debugging)
3066 ALL_OBJSECTIONS (objfile, osect)
3067 if (section_is_overlay (osect->the_bfd_section))
3069 if (pc_in_mapped_range (pc, osect->the_bfd_section))
3071 if (overlay_is_mapped (osect))
3072 return osect->the_bfd_section;
3076 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
3079 return best_match ? best_match->the_bfd_section : NULL;
3082 /* Function: find_pc_mapped_section (PC)
3083 If PC falls into the VMA address range of an overlay section that is
3084 currently marked as MAPPED, return that section. Else return NULL. */
3087 find_pc_mapped_section (CORE_ADDR pc)
3089 struct objfile *objfile;
3090 struct obj_section *osect;
3092 if (overlay_debugging)
3093 ALL_OBJSECTIONS (objfile, osect)
3094 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
3095 overlay_is_mapped (osect))
3096 return osect->the_bfd_section;
3101 /* Function: list_overlays_command
3102 Print a list of mapped sections and their PC ranges */
3105 list_overlays_command (char *args, int from_tty)
3108 struct objfile *objfile;
3109 struct obj_section *osect;
3111 if (overlay_debugging)
3112 ALL_OBJSECTIONS (objfile, osect)
3113 if (overlay_is_mapped (osect))
3119 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
3120 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
3121 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3122 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
3124 printf_filtered ("Section %s, loaded at ", name);
3125 print_address_numeric (lma, 1, gdb_stdout);
3126 puts_filtered (" - ");
3127 print_address_numeric (lma + size, 1, gdb_stdout);
3128 printf_filtered (", mapped at ");
3129 print_address_numeric (vma, 1, gdb_stdout);
3130 puts_filtered (" - ");
3131 print_address_numeric (vma + size, 1, gdb_stdout);
3132 puts_filtered ("\n");
3137 printf_filtered ("No sections are mapped.\n");
3140 /* Function: map_overlay_command
3141 Mark the named section as mapped (ie. residing at its VMA address). */
3144 map_overlay_command (char *args, int from_tty)
3146 struct objfile *objfile, *objfile2;
3147 struct obj_section *sec, *sec2;
3150 if (!overlay_debugging)
3152 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3153 the 'overlay manual' command.");
3155 if (args == 0 || *args == 0)
3156 error ("Argument required: name of an overlay section");
3158 /* First, find a section matching the user supplied argument */
3159 ALL_OBJSECTIONS (objfile, sec)
3160 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3162 /* Now, check to see if the section is an overlay. */
3163 bfdsec = sec->the_bfd_section;
3164 if (!section_is_overlay (bfdsec))
3165 continue; /* not an overlay section */
3167 /* Mark the overlay as "mapped" */
3168 sec->ovly_mapped = 1;
3170 /* Next, make a pass and unmap any sections that are
3171 overlapped by this new section: */
3172 ALL_OBJSECTIONS (objfile2, sec2)
3173 if (sec2->ovly_mapped
3175 && sec->the_bfd_section != sec2->the_bfd_section
3176 && sections_overlap (sec->the_bfd_section,
3177 sec2->the_bfd_section))
3180 printf_filtered ("Note: section %s unmapped by overlap\n",
3181 bfd_section_name (objfile->obfd,
3182 sec2->the_bfd_section));
3183 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
3187 error ("No overlay section called %s", args);
3190 /* Function: unmap_overlay_command
3191 Mark the overlay section as unmapped
3192 (ie. resident in its LMA address range, rather than the VMA range). */
3195 unmap_overlay_command (char *args, int from_tty)
3197 struct objfile *objfile;
3198 struct obj_section *sec;
3200 if (!overlay_debugging)
3202 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3203 the 'overlay manual' command.");
3205 if (args == 0 || *args == 0)
3206 error ("Argument required: name of an overlay section");
3208 /* First, find a section matching the user supplied argument */
3209 ALL_OBJSECTIONS (objfile, sec)
3210 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
3212 if (!sec->ovly_mapped)
3213 error ("Section %s is not mapped", args);
3214 sec->ovly_mapped = 0;
3217 error ("No overlay section called %s", args);
3220 /* Function: overlay_auto_command
3221 A utility command to turn on overlay debugging.
3222 Possibly this should be done via a set/show command. */
3225 overlay_auto_command (char *args, int from_tty)
3227 overlay_debugging = ovly_auto;
3228 enable_overlay_breakpoints ();
3230 printf_filtered ("Automatic overlay debugging enabled.");
3233 /* Function: overlay_manual_command
3234 A utility command to turn on overlay debugging.
3235 Possibly this should be done via a set/show command. */
3238 overlay_manual_command (char *args, int from_tty)
3240 overlay_debugging = ovly_on;
3241 disable_overlay_breakpoints ();
3243 printf_filtered ("Overlay debugging enabled.");
3246 /* Function: overlay_off_command
3247 A utility command to turn on overlay debugging.
3248 Possibly this should be done via a set/show command. */
3251 overlay_off_command (char *args, int from_tty)
3253 overlay_debugging = ovly_off;
3254 disable_overlay_breakpoints ();
3256 printf_filtered ("Overlay debugging disabled.");
3260 overlay_load_command (char *args, int from_tty)
3262 if (target_overlay_update)
3263 (*target_overlay_update) (NULL);
3265 error ("This target does not know how to read its overlay state.");
3268 /* Function: overlay_command
3269 A place-holder for a mis-typed command */
3271 /* Command list chain containing all defined "overlay" subcommands. */
3272 struct cmd_list_element *overlaylist;
3275 overlay_command (char *args, int from_tty)
3278 ("\"overlay\" must be followed by the name of an overlay command.\n");
3279 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3283 /* Target Overlays for the "Simplest" overlay manager:
3285 This is GDB's default target overlay layer. It works with the
3286 minimal overlay manager supplied as an example by Cygnus. The
3287 entry point is via a function pointer "target_overlay_update",
3288 so targets that use a different runtime overlay manager can
3289 substitute their own overlay_update function and take over the
3292 The overlay_update function pokes around in the target's data structures
3293 to see what overlays are mapped, and updates GDB's overlay mapping with
3296 In this simple implementation, the target data structures are as follows:
3297 unsigned _novlys; /# number of overlay sections #/
3298 unsigned _ovly_table[_novlys][4] = {
3299 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3300 {..., ..., ..., ...},
3302 unsigned _novly_regions; /# number of overlay regions #/
3303 unsigned _ovly_region_table[_novly_regions][3] = {
3304 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3307 These functions will attempt to update GDB's mappedness state in the
3308 symbol section table, based on the target's mappedness state.
3310 To do this, we keep a cached copy of the target's _ovly_table, and
3311 attempt to detect when the cached copy is invalidated. The main
3312 entry point is "simple_overlay_update(SECT), which looks up SECT in
3313 the cached table and re-reads only the entry for that section from
3314 the target (whenever possible).
3317 /* Cached, dynamically allocated copies of the target data structures: */
3318 static unsigned (*cache_ovly_table)[4] = 0;
3320 static unsigned (*cache_ovly_region_table)[3] = 0;
3322 static unsigned cache_novlys = 0;
3324 static unsigned cache_novly_regions = 0;
3326 static CORE_ADDR cache_ovly_table_base = 0;
3328 static CORE_ADDR cache_ovly_region_table_base = 0;
3332 VMA, SIZE, LMA, MAPPED
3334 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3336 /* Throw away the cached copy of _ovly_table */
3338 simple_free_overlay_table (void)
3340 if (cache_ovly_table)
3341 xfree (cache_ovly_table);
3343 cache_ovly_table = NULL;
3344 cache_ovly_table_base = 0;
3348 /* Throw away the cached copy of _ovly_region_table */
3350 simple_free_overlay_region_table (void)
3352 if (cache_ovly_region_table)
3353 xfree (cache_ovly_region_table);
3354 cache_novly_regions = 0;
3355 cache_ovly_region_table = NULL;
3356 cache_ovly_region_table_base = 0;
3360 /* Read an array of ints from the target into a local buffer.
3361 Convert to host order. int LEN is number of ints */
3363 read_target_long_array (CORE_ADDR memaddr, unsigned int *myaddr, int len)
3365 /* FIXME (alloca): Not safe if array is very large. */
3366 char *buf = alloca (len * TARGET_LONG_BYTES);
3369 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3370 for (i = 0; i < len; i++)
3371 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3375 /* Find and grab a copy of the target _ovly_table
3376 (and _novlys, which is needed for the table's size) */
3378 simple_read_overlay_table (void)
3380 struct minimal_symbol *novlys_msym, *ovly_table_msym;
3382 simple_free_overlay_table ();
3383 novlys_msym = lookup_minimal_symbol ("_novlys", NULL, NULL);
3386 error ("Error reading inferior's overlay table: "
3387 "couldn't find `_novlys' variable\n"
3388 "in inferior. Use `overlay manual' mode.");
3392 ovly_table_msym = lookup_minimal_symbol ("_ovly_table", NULL, NULL);
3393 if (! ovly_table_msym)
3395 error ("Error reading inferior's overlay table: couldn't find "
3396 "`_ovly_table' array\n"
3397 "in inferior. Use `overlay manual' mode.");
3401 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym), 4);
3403 = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3404 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (ovly_table_msym);
3405 read_target_long_array (cache_ovly_table_base,
3406 (int *) cache_ovly_table,
3409 return 1; /* SUCCESS */
3413 /* Find and grab a copy of the target _ovly_region_table
3414 (and _novly_regions, which is needed for the table's size) */
3416 simple_read_overlay_region_table (void)
3418 struct minimal_symbol *msym;
3420 simple_free_overlay_region_table ();
3421 msym = lookup_minimal_symbol ("_novly_regions", NULL, NULL);
3423 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3425 return 0; /* failure */
3426 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3427 if (cache_ovly_region_table != NULL)
3429 msym = lookup_minimal_symbol ("_ovly_region_table", NULL, NULL);
3432 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3433 read_target_long_array (cache_ovly_region_table_base,
3434 (int *) cache_ovly_region_table,
3435 cache_novly_regions * 3);
3438 return 0; /* failure */
3441 return 0; /* failure */
3442 return 1; /* SUCCESS */
3446 /* Function: simple_overlay_update_1
3447 A helper function for simple_overlay_update. Assuming a cached copy
3448 of _ovly_table exists, look through it to find an entry whose vma,
3449 lma and size match those of OSECT. Re-read the entry and make sure
3450 it still matches OSECT (else the table may no longer be valid).
3451 Set OSECT's mapped state to match the entry. Return: 1 for
3452 success, 0 for failure. */
3455 simple_overlay_update_1 (struct obj_section *osect)
3458 bfd *obfd = osect->objfile->obfd;
3459 asection *bsect = osect->the_bfd_section;
3461 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3462 for (i = 0; i < cache_novlys; i++)
3463 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3464 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3465 /* && cache_ovly_table[i][SIZE] == size */ )
3467 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3468 (int *) cache_ovly_table[i], 4);
3469 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3470 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3471 /* && cache_ovly_table[i][SIZE] == size */ )
3473 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3476 else /* Warning! Warning! Target's ovly table has changed! */
3482 /* Function: simple_overlay_update
3483 If OSECT is NULL, then update all sections' mapped state
3484 (after re-reading the entire target _ovly_table).
3485 If OSECT is non-NULL, then try to find a matching entry in the
3486 cached ovly_table and update only OSECT's mapped state.
3487 If a cached entry can't be found or the cache isn't valid, then
3488 re-read the entire cache, and go ahead and update all sections. */
3491 simple_overlay_update (struct obj_section *osect)
3493 struct objfile *objfile;
3495 /* Were we given an osect to look up? NULL means do all of them. */
3497 /* Have we got a cached copy of the target's overlay table? */
3498 if (cache_ovly_table != NULL)
3499 /* Does its cached location match what's currently in the symtab? */
3500 if (cache_ovly_table_base ==
3501 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL, NULL)))
3502 /* Then go ahead and try to look up this single section in the cache */
3503 if (simple_overlay_update_1 (osect))
3504 /* Found it! We're done. */
3507 /* Cached table no good: need to read the entire table anew.
3508 Or else we want all the sections, in which case it's actually
3509 more efficient to read the whole table in one block anyway. */
3511 if (! simple_read_overlay_table ())
3514 /* Now may as well update all sections, even if only one was requested. */
3515 ALL_OBJSECTIONS (objfile, osect)
3516 if (section_is_overlay (osect->the_bfd_section))
3519 bfd *obfd = osect->objfile->obfd;
3520 asection *bsect = osect->the_bfd_section;
3522 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3523 for (i = 0; i < cache_novlys; i++)
3524 if (cache_ovly_table[i][VMA] == bfd_section_vma (obfd, bsect)
3525 && cache_ovly_table[i][LMA] == bfd_section_lma (obfd, bsect)
3526 /* && cache_ovly_table[i][SIZE] == size */ )
3527 { /* obj_section matches i'th entry in ovly_table */
3528 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3529 break; /* finished with inner for loop: break out */
3534 /* Set the output sections and output offsets for section SECTP in
3535 ABFD. The relocation code in BFD will read these offsets, so we
3536 need to be sure they're initialized. We map each section to itself,
3537 with no offset; this means that SECTP->vma will be honored. */
3540 symfile_dummy_outputs (bfd *abfd, asection *sectp, void *dummy)
3542 sectp->output_section = sectp;
3543 sectp->output_offset = 0;
3546 /* Relocate the contents of a debug section SECTP in ABFD. The
3547 contents are stored in BUF if it is non-NULL, or returned in a
3548 malloc'd buffer otherwise.
3550 For some platforms and debug info formats, shared libraries contain
3551 relocations against the debug sections (particularly for DWARF-2;
3552 one affected platform is PowerPC GNU/Linux, although it depends on
3553 the version of the linker in use). Also, ELF object files naturally
3554 have unresolved relocations for their debug sections. We need to apply
3555 the relocations in order to get the locations of symbols correct. */
3558 symfile_relocate_debug_section (bfd *abfd, asection *sectp, bfd_byte *buf)
3560 /* We're only interested in debugging sections with relocation
3562 if ((sectp->flags & SEC_RELOC) == 0)
3564 if ((sectp->flags & SEC_DEBUGGING) == 0)
3567 /* We will handle section offsets properly elsewhere, so relocate as if
3568 all sections begin at 0. */
3569 bfd_map_over_sections (abfd, symfile_dummy_outputs, NULL);
3571 return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL);
3575 _initialize_symfile (void)
3577 struct cmd_list_element *c;
3579 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3580 "Load symbol table from executable file FILE.\n\
3581 The `file' command can also load symbol tables, as well as setting the file\n\
3582 to execute.", &cmdlist);
3583 set_cmd_completer (c, filename_completer);
3585 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3586 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3587 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3588 ADDR is the starting address of the file's text.\n\
3589 The optional arguments are section-name section-address pairs and\n\
3590 should be specified if the data and bss segments are not contiguous\n\
3591 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3593 set_cmd_completer (c, filename_completer);
3595 c = add_cmd ("add-shared-symbol-files", class_files,
3596 add_shared_symbol_files_command,
3597 "Load the symbols from shared objects in the dynamic linker's link map.",
3599 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3602 c = add_cmd ("load", class_files, load_command,
3603 "Dynamically load FILE into the running program, and record its symbols\n\
3604 for access from GDB.", &cmdlist);
3605 set_cmd_completer (c, filename_completer);
3608 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3609 (char *) &symbol_reloading,
3610 "Set dynamic symbol table reloading multiple times in one run.",
3614 add_prefix_cmd ("overlay", class_support, overlay_command,
3615 "Commands for debugging overlays.", &overlaylist,
3616 "overlay ", 0, &cmdlist);
3618 add_com_alias ("ovly", "overlay", class_alias, 1);
3619 add_com_alias ("ov", "overlay", class_alias, 1);
3621 add_cmd ("map-overlay", class_support, map_overlay_command,
3622 "Assert that an overlay section is mapped.", &overlaylist);
3624 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3625 "Assert that an overlay section is unmapped.", &overlaylist);
3627 add_cmd ("list-overlays", class_support, list_overlays_command,
3628 "List mappings of overlay sections.", &overlaylist);
3630 add_cmd ("manual", class_support, overlay_manual_command,
3631 "Enable overlay debugging.", &overlaylist);
3632 add_cmd ("off", class_support, overlay_off_command,
3633 "Disable overlay debugging.", &overlaylist);
3634 add_cmd ("auto", class_support, overlay_auto_command,
3635 "Enable automatic overlay debugging.", &overlaylist);
3636 add_cmd ("load-target", class_support, overlay_load_command,
3637 "Read the overlay mapping state from the target.", &overlaylist);
3639 /* Filename extension to source language lookup table: */
3640 init_filename_language_table ();
3641 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3643 "Set mapping between filename extension and source language.\n\
3644 Usage: set extension-language .foo bar",
3646 set_cmd_cfunc (c, set_ext_lang_command);
3648 add_info ("extensions", info_ext_lang_command,
3649 "All filename extensions associated with a source language.");
3652 (add_set_cmd ("download-write-size", class_obscure,
3653 var_integer, (char *) &download_write_size,
3654 "Set the write size used when downloading a program.\n"
3655 "Only used when downloading a program onto a remote\n"
3656 "target. Specify zero, or a negative value, to disable\n"
3657 "blocked writes. The actual size of each transfer is also\n"
3658 "limited by the size of the target packet and the memory\n"
3663 debug_file_directory = xstrdup (DEBUGDIR);
3665 ("debug-file-directory", class_support, var_string,
3666 (char *) &debug_file_directory,
3667 "Set the directory where separate debug symbols are searched for.\n"
3668 "Separate debug symbols are first searched for in the same\n"
3669 "directory as the binary, then in the `" DEBUG_SUBDIRECTORY
3671 "and lastly at the path of the directory of the binary with\n"
3672 "the global debug-file directory prepended\n",
3674 add_show_from_set (c, &showlist);
3675 set_cmd_completer (c, filename_completer);