1 /* Generic symbol file reading for the GNU debugger, GDB.
2 Copyright 1990-1996, 1998, 2000 Free Software Foundation, Inc.
3 Contributed by Cygnus Support, using pieces from other GDB modules.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 #include "breakpoint.h"
34 #include "complaints.h"
36 #include "inferior.h" /* for write_pc */
37 #include "gdb-stabs.h"
41 #include <sys/types.h>
43 #include "gdb_string.h"
54 /* Some HP-UX related globals to clear when a new "main"
55 symbol file is loaded. HP-specific. */
57 extern int hp_som_som_object_present;
58 extern int hp_cxx_exception_support_initialized;
59 #define RESET_HP_UX_GLOBALS() do {\
60 hp_som_som_object_present = 0; /* indicates HP-compiled code */ \
61 hp_cxx_exception_support_initialized = 0; /* must reinitialize exception stuff */ \
65 int (*ui_load_progress_hook) (const char *section, unsigned long num);
66 void (*show_load_progress) (const char *section,
67 unsigned long section_sent,
68 unsigned long section_size,
69 unsigned long total_sent,
70 unsigned long total_size);
71 void (*pre_add_symbol_hook) PARAMS ((char *));
72 void (*post_add_symbol_hook) PARAMS ((void));
73 void (*target_new_objfile_hook) PARAMS ((struct objfile *));
75 static void clear_symtab_users_cleanup (void *ignore);
77 /* Global variables owned by this file */
78 int readnow_symbol_files; /* Read full symbols immediately */
80 struct complaint oldsyms_complaint =
82 "Replacing old symbols for `%s'", 0, 0
85 struct complaint empty_symtab_complaint =
87 "Empty symbol table found for `%s'", 0, 0
90 struct complaint unknown_option_complaint =
92 "Unknown option `%s' ignored", 0, 0
95 /* External variables and functions referenced. */
97 extern int info_verbose;
99 extern void report_transfer_performance PARAMS ((unsigned long,
102 /* Functions this file defines */
105 static int simple_read_overlay_region_table PARAMS ((void));
106 static void simple_free_overlay_region_table PARAMS ((void));
109 static void set_initial_language PARAMS ((void));
111 static void load_command PARAMS ((char *, int));
113 static void add_symbol_file_command PARAMS ((char *, int));
115 static void add_shared_symbol_files_command PARAMS ((char *, int));
117 static void cashier_psymtab PARAMS ((struct partial_symtab *));
119 static int compare_psymbols PARAMS ((const void *, const void *));
121 static int compare_symbols PARAMS ((const void *, const void *));
123 bfd *symfile_bfd_open PARAMS ((char *));
125 static void find_sym_fns PARAMS ((struct objfile *));
127 static void decrement_reading_symtab PARAMS ((void *));
129 static void overlay_invalidate_all PARAMS ((void));
131 static int overlay_is_mapped PARAMS ((struct obj_section *));
133 void list_overlays_command PARAMS ((char *, int));
135 void map_overlay_command PARAMS ((char *, int));
137 void unmap_overlay_command PARAMS ((char *, int));
139 static void overlay_auto_command PARAMS ((char *, int));
141 static void overlay_manual_command PARAMS ((char *, int));
143 static void overlay_off_command PARAMS ((char *, int));
145 static void overlay_load_command PARAMS ((char *, int));
147 static void overlay_command PARAMS ((char *, int));
149 static void simple_free_overlay_table PARAMS ((void));
151 static void read_target_long_array PARAMS ((CORE_ADDR, unsigned int *, int));
153 static int simple_read_overlay_table PARAMS ((void));
155 static int simple_overlay_update_1 PARAMS ((struct obj_section *));
157 static void add_filename_language PARAMS ((char *ext, enum language lang));
159 static void set_ext_lang_command PARAMS ((char *args, int from_tty));
161 static void info_ext_lang_command PARAMS ((char *args, int from_tty));
163 static void init_filename_language_table PARAMS ((void));
165 void _initialize_symfile PARAMS ((void));
167 /* List of all available sym_fns. On gdb startup, each object file reader
168 calls add_symtab_fns() to register information on each format it is
171 static struct sym_fns *symtab_fns = NULL;
173 /* Flag for whether user will be reloading symbols multiple times.
174 Defaults to ON for VxWorks, otherwise OFF. */
176 #ifdef SYMBOL_RELOADING_DEFAULT
177 int symbol_reloading = SYMBOL_RELOADING_DEFAULT;
179 int symbol_reloading = 0;
182 /* If non-zero, then on HP-UX (i.e., platforms that use somsolib.c),
183 this variable is interpreted as a threshhold. If adding a new
184 library's symbol table to those already known to the debugger would
185 exceed this threshhold, then the shlib's symbols are not added.
187 If non-zero on other platforms, shared library symbols will be added
188 automatically when the inferior is created, new libraries are loaded,
189 or when attaching to the inferior. This is almost always what users
190 will want to have happen; but for very large programs, the startup
191 time will be excessive, and so if this is a problem, the user can
192 clear this flag and then add the shared library symbols as needed.
193 Note that there is a potential for confusion, since if the shared
194 library symbols are not loaded, commands like "info fun" will *not*
195 report all the functions that are actually present.
197 Note that HP-UX interprets this variable to mean, "threshhold size
198 in megabytes, where zero means never add". Other platforms interpret
199 this variable to mean, "always add if non-zero, never add if zero."
202 int auto_solib_add = 1;
205 /* Since this function is called from within qsort, in an ANSI environment
206 it must conform to the prototype for qsort, which specifies that the
207 comparison function takes two "void *" pointers. */
210 compare_symbols (s1p, s2p)
214 register struct symbol **s1, **s2;
216 s1 = (struct symbol **) s1p;
217 s2 = (struct symbol **) s2p;
219 return (STRCMP (SYMBOL_NAME (*s1), SYMBOL_NAME (*s2)));
226 compare_psymbols -- compare two partial symbols by name
230 Given pointers to pointers to two partial symbol table entries,
231 compare them by name and return -N, 0, or +N (ala strcmp).
232 Typically used by sorting routines like qsort().
236 Does direct compare of first two characters before punting
237 and passing to strcmp for longer compares. Note that the
238 original version had a bug whereby two null strings or two
239 identically named one character strings would return the
240 comparison of memory following the null byte.
245 compare_psymbols (s1p, s2p)
249 register char *st1 = SYMBOL_NAME (*(struct partial_symbol **) s1p);
250 register char *st2 = SYMBOL_NAME (*(struct partial_symbol **) s2p);
252 if ((st1[0] - st2[0]) || !st1[0])
254 return (st1[0] - st2[0]);
256 else if ((st1[1] - st2[1]) || !st1[1])
258 return (st1[1] - st2[1]);
262 /* Note: I replaced the STRCMP line (commented out below)
263 * with a simpler "strcmp()" which compares the 2 strings
264 * from the beginning. (STRCMP is a macro which first compares
265 * the initial characters, then falls back on strcmp).
266 * The reason is that the STRCMP line was tickling a C compiler
267 * bug on HP-UX 10.30, which is avoided with the simpler
268 * code. The performance gain from the more complicated code
269 * is negligible, given that we have already checked the
270 * initial 2 characters above. I reported the compiler bug,
271 * and once it is fixed the original line can be put back. RT
273 /* return ( STRCMP (st1 + 2, st2 + 2)); */
274 return (strcmp (st1, st2));
279 sort_pst_symbols (pst)
280 struct partial_symtab *pst;
282 /* Sort the global list; don't sort the static list */
284 qsort (pst->objfile->global_psymbols.list + pst->globals_offset,
285 pst->n_global_syms, sizeof (struct partial_symbol *),
289 /* Call sort_block_syms to sort alphabetically the symbols of one block. */
293 register struct block *b;
295 qsort (&BLOCK_SYM (b, 0), BLOCK_NSYMS (b),
296 sizeof (struct symbol *), compare_symbols);
299 /* Call sort_symtab_syms to sort alphabetically
300 the symbols of each block of one symtab. */
304 register struct symtab *s;
306 register struct blockvector *bv;
309 register struct block *b;
313 bv = BLOCKVECTOR (s);
314 nbl = BLOCKVECTOR_NBLOCKS (bv);
315 for (i = 0; i < nbl; i++)
317 b = BLOCKVECTOR_BLOCK (bv, i);
318 if (BLOCK_SHOULD_SORT (b))
323 /* Make a null terminated copy of the string at PTR with SIZE characters in
324 the obstack pointed to by OBSTACKP . Returns the address of the copy.
325 Note that the string at PTR does not have to be null terminated, I.E. it
326 may be part of a larger string and we are only saving a substring. */
329 obsavestring (ptr, size, obstackp)
332 struct obstack *obstackp;
334 register char *p = (char *) obstack_alloc (obstackp, size + 1);
335 /* Open-coded memcpy--saves function call time. These strings are usually
336 short. FIXME: Is this really still true with a compiler that can
339 register char *p1 = ptr;
340 register char *p2 = p;
341 char *end = ptr + size;
349 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
350 in the obstack pointed to by OBSTACKP. */
353 obconcat (obstackp, s1, s2, s3)
354 struct obstack *obstackp;
355 const char *s1, *s2, *s3;
357 register int len = strlen (s1) + strlen (s2) + strlen (s3) + 1;
358 register char *val = (char *) obstack_alloc (obstackp, len);
365 /* True if we are nested inside psymtab_to_symtab. */
367 int currently_reading_symtab = 0;
370 decrement_reading_symtab (dummy)
373 currently_reading_symtab--;
376 /* Get the symbol table that corresponds to a partial_symtab.
377 This is fast after the first time you do it. In fact, there
378 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
382 psymtab_to_symtab (pst)
383 register struct partial_symtab *pst;
385 /* If it's been looked up before, return it. */
389 /* If it has not yet been read in, read it. */
392 struct cleanup *back_to = make_cleanup (decrement_reading_symtab, NULL);
393 currently_reading_symtab++;
394 (*pst->read_symtab) (pst);
395 do_cleanups (back_to);
401 /* Initialize entry point information for this objfile. */
404 init_entry_point_info (objfile)
405 struct objfile *objfile;
407 /* Save startup file's range of PC addresses to help blockframe.c
408 decide where the bottom of the stack is. */
410 if (bfd_get_file_flags (objfile->obfd) & EXEC_P)
412 /* Executable file -- record its entry point so we'll recognize
413 the startup file because it contains the entry point. */
414 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd);
418 /* Examination of non-executable.o files. Short-circuit this stuff. */
419 objfile->ei.entry_point = INVALID_ENTRY_POINT;
421 objfile->ei.entry_file_lowpc = INVALID_ENTRY_LOWPC;
422 objfile->ei.entry_file_highpc = INVALID_ENTRY_HIGHPC;
423 objfile->ei.entry_func_lowpc = INVALID_ENTRY_LOWPC;
424 objfile->ei.entry_func_highpc = INVALID_ENTRY_HIGHPC;
425 objfile->ei.main_func_lowpc = INVALID_ENTRY_LOWPC;
426 objfile->ei.main_func_highpc = INVALID_ENTRY_HIGHPC;
429 /* Get current entry point address. */
432 entry_point_address ()
434 return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
437 /* Remember the lowest-addressed loadable section we've seen.
438 This function is called via bfd_map_over_sections.
440 In case of equal vmas, the section with the largest size becomes the
441 lowest-addressed loadable section.
443 If the vmas and sizes are equal, the last section is considered the
444 lowest-addressed loadable section. */
447 find_lowest_section (abfd, sect, obj)
452 asection **lowest = (asection **) obj;
454 if (0 == (bfd_get_section_flags (abfd, sect) & SEC_LOAD))
457 *lowest = sect; /* First loadable section */
458 else if (bfd_section_vma (abfd, *lowest) > bfd_section_vma (abfd, sect))
459 *lowest = sect; /* A lower loadable section */
460 else if (bfd_section_vma (abfd, *lowest) == bfd_section_vma (abfd, sect)
461 && (bfd_section_size (abfd, (*lowest))
462 <= bfd_section_size (abfd, sect)))
467 /* Build (allocate and populate) a section_addr_info struct from
468 an existing section table. */
470 extern struct section_addr_info *
471 build_section_addr_info_from_section_table (const struct section_table *start,
472 const struct section_table *end)
474 struct section_addr_info *sap;
475 const struct section_table *stp;
478 sap = xmalloc (sizeof (struct section_addr_info));
479 memset (sap, 0, sizeof (struct section_addr_info));
481 for (stp = start, oidx = 0; stp != end; stp++)
483 if (stp->the_bfd_section->flags & (SEC_ALLOC | SEC_LOAD)
484 && oidx < MAX_SECTIONS)
486 sap->other[oidx].addr = stp->addr;
487 sap->other[oidx].name = xstrdup (stp->the_bfd_section->name);
488 sap->other[oidx].sectindex = stp->the_bfd_section->index;
497 /* Free all memory allocated by build_section_addr_info_from_section_table. */
500 free_section_addr_info (struct section_addr_info *sap)
504 for (idx = 0; idx < MAX_SECTIONS; idx++)
505 if (sap->other[idx].name)
506 free (sap->other[idx].name);
511 /* Parse the user's idea of an offset for dynamic linking, into our idea
512 of how to represent it for fast symbol reading. This is the default
513 version of the sym_fns.sym_offsets function for symbol readers that
514 don't need to do anything special. It allocates a section_offsets table
515 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
518 default_symfile_offsets (objfile, addrs)
519 struct objfile *objfile;
520 struct section_addr_info *addrs;
523 asection *sect = NULL;
525 objfile->num_sections = SECT_OFF_MAX;
526 objfile->section_offsets = (struct section_offsets *)
527 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
528 memset (objfile->section_offsets, 0, SIZEOF_SECTION_OFFSETS);
530 /* Now calculate offsets for section that were specified by the
532 for (i = 0; i < MAX_SECTIONS && addrs->other[i].name; i++)
534 struct other_sections *osp ;
536 osp = &addrs->other[i] ;
540 /* Record all sections in offsets */
541 /* The section_offsets in the objfile are here filled in using
543 ANOFFSET (objfile->section_offsets, osp->sectindex) = osp->addr;
546 /* Remember the bfd indexes for the .text, .data, .bss and
549 sect = bfd_get_section_by_name (objfile->obfd, ".text");
551 objfile->sect_index_text = sect->index;
553 sect = bfd_get_section_by_name (objfile->obfd, ".data");
555 objfile->sect_index_data = sect->index;
557 sect = bfd_get_section_by_name (objfile->obfd, ".bss");
559 objfile->sect_index_bss = sect->index;
561 sect = bfd_get_section_by_name (objfile->obfd, ".rodata");
563 objfile->sect_index_rodata = sect->index;
567 /* Process a symbol file, as either the main file or as a dynamically
570 OBJFILE is where the symbols are to be read from.
572 ADDR is the address where the text segment was loaded, unless the
573 objfile is the main symbol file, in which case it is zero.
575 MAINLINE is nonzero if this is the main symbol file, or zero if
576 it's an extra symbol file such as dynamically loaded code.
578 VERBO is nonzero if the caller has printed a verbose message about
579 the symbol reading (and complaints can be more terse about it). */
582 syms_from_objfile (objfile, addrs, mainline, verbo)
583 struct objfile *objfile;
584 struct section_addr_info *addrs;
588 asection *lower_sect;
590 CORE_ADDR lower_offset;
591 struct section_addr_info local_addr;
592 struct cleanup *old_chain;
595 /* If ADDRS is NULL, initialize the local section_addr_info struct and
596 point ADDRS to it. We now establish the convention that an addr of
597 zero means no load address was specified. */
601 memset (&local_addr, 0, sizeof (local_addr));
605 init_entry_point_info (objfile);
606 find_sym_fns (objfile);
608 /* Make sure that partially constructed symbol tables will be cleaned up
609 if an error occurs during symbol reading. */
610 old_chain = make_cleanup_free_objfile (objfile);
614 /* We will modify the main symbol table, make sure that all its users
615 will be cleaned up if an error occurs during symbol reading. */
616 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
618 /* Since no error yet, throw away the old symbol table. */
620 if (symfile_objfile != NULL)
622 free_objfile (symfile_objfile);
623 symfile_objfile = NULL;
626 /* Currently we keep symbols from the add-symbol-file command.
627 If the user wants to get rid of them, they should do "symbol-file"
628 without arguments first. Not sure this is the best behavior
631 (*objfile->sf->sym_new_init) (objfile);
634 /* Convert addr into an offset rather than an absolute address.
635 We find the lowest address of a loaded segment in the objfile,
636 and assume that <addr> is where that got loaded.
638 We no longer warn if the lowest section is not a text segment (as
639 happens for the PA64 port. */
642 /* Find lowest loadable section to be used as starting point for
643 continguous sections. FIXME!! won't work without call to find
644 .text first, but this assumes text is lowest section. */
645 lower_sect = bfd_get_section_by_name (objfile->obfd, ".text");
646 if (lower_sect == NULL)
647 bfd_map_over_sections (objfile->obfd, find_lowest_section,
649 if (lower_sect == NULL)
650 warning ("no loadable sections found in added symbol-file %s",
653 if ((bfd_get_section_flags (objfile->obfd, lower_sect) & SEC_CODE) == 0)
654 warning ("Lowest section in %s is %s at %s",
656 bfd_section_name (objfile->obfd, lower_sect),
657 paddr (bfd_section_vma (objfile->obfd, lower_sect)));
658 if (lower_sect != NULL)
659 lower_offset = bfd_section_vma (objfile->obfd, lower_sect);
663 /* Calculate offsets for the loadable sections.
664 FIXME! Sections must be in order of increasing loadable section
665 so that contiguous sections can use the lower-offset!!!
667 Adjust offsets if the segments are not contiguous.
668 If the section is contiguous, its offset should be set to
669 the offset of the highest loadable section lower than it
670 (the loadable section directly below it in memory).
671 this_offset = lower_offset = lower_addr - lower_orig_addr */
673 /* Calculate offsets for sections. */
674 for (i=0 ; i < MAX_SECTIONS && addrs->other[i].name; i++)
676 if (addrs->other[i].addr != 0)
678 sect = bfd_get_section_by_name (objfile->obfd, addrs->other[i].name);
681 addrs->other[i].addr -= bfd_section_vma (objfile->obfd, sect);
682 lower_offset = addrs->other[i].addr;
683 /* This is the index used by BFD. */
684 addrs->other[i].sectindex = sect->index ;
688 warning ("section %s not found in %s", addrs->other[i].name,
690 addrs->other[i].addr = 0;
694 addrs->other[i].addr = lower_offset;
698 /* Initialize symbol reading routines for this objfile, allow complaints to
699 appear for this new file, and record how verbose to be, then do the
700 initial symbol reading for this file. */
702 (*objfile->sf->sym_init) (objfile);
703 clear_complaints (1, verbo);
705 (*objfile->sf->sym_offsets) (objfile, addrs);
707 #ifndef IBM6000_TARGET
708 /* This is a SVR4/SunOS specific hack, I think. In any event, it
709 screws RS/6000. sym_offsets should be doing this sort of thing,
710 because it knows the mapping between bfd sections and
712 /* This is a hack. As far as I can tell, section offsets are not
713 target dependent. They are all set to addr with a couple of
714 exceptions. The exceptions are sysvr4 shared libraries, whose
715 offsets are kept in solib structures anyway and rs6000 xcoff
716 which handles shared libraries in a completely unique way.
718 Section offsets are built similarly, except that they are built
719 by adding addr in all cases because there is no clear mapping
720 from section_offsets into actual sections. Note that solib.c
721 has a different algorithm for finding section offsets.
723 These should probably all be collapsed into some target
724 independent form of shared library support. FIXME. */
728 struct obj_section *s;
730 /* Map section offsets in "addr" back to the object's
731 sections by comparing the section names with bfd's
732 section names. Then adjust the section address by
733 the offset. */ /* for gdb/13815 */
735 ALL_OBJFILE_OSECTIONS (objfile, s)
737 CORE_ADDR s_addr = 0;
741 !s_addr && i < MAX_SECTIONS && addrs->other[i].name;
743 if (strcmp (s->the_bfd_section->name, addrs->other[i].name) == 0)
744 s_addr = addrs->other[i].addr; /* end added for gdb/13815 */
746 s->addr -= s->offset;
748 s->endaddr -= s->offset;
749 s->endaddr += s_addr;
753 #endif /* not IBM6000_TARGET */
755 (*objfile->sf->sym_read) (objfile, mainline);
757 if (!have_partial_symbols () && !have_full_symbols ())
760 printf_filtered ("(no debugging symbols found)...");
764 /* Don't allow char * to have a typename (else would get caddr_t).
765 Ditto void *. FIXME: Check whether this is now done by all the
766 symbol readers themselves (many of them now do), and if so remove
769 TYPE_NAME (lookup_pointer_type (builtin_type_char)) = 0;
770 TYPE_NAME (lookup_pointer_type (builtin_type_void)) = 0;
772 /* Mark the objfile has having had initial symbol read attempted. Note
773 that this does not mean we found any symbols... */
775 objfile->flags |= OBJF_SYMS;
777 /* Discard cleanups as symbol reading was successful. */
779 discard_cleanups (old_chain);
781 /* Call this after reading in a new symbol table to give target
782 dependant code a crack at the new symbols. For instance, this
783 could be used to update the values of target-specific symbols GDB
784 needs to keep track of (such as _sigtramp, or whatever). */
786 TARGET_SYMFILE_POSTREAD (objfile);
789 /* Perform required actions after either reading in the initial
790 symbols for a new objfile, or mapping in the symbols from a reusable
794 new_symfile_objfile (objfile, mainline, verbo)
795 struct objfile *objfile;
800 /* If this is the main symbol file we have to clean up all users of the
801 old main symbol file. Otherwise it is sufficient to fixup all the
802 breakpoints that may have been redefined by this symbol file. */
805 /* OK, make it the "real" symbol file. */
806 symfile_objfile = objfile;
808 clear_symtab_users ();
812 breakpoint_re_set ();
815 /* We're done reading the symbol file; finish off complaints. */
816 clear_complaints (0, verbo);
819 /* Process a symbol file, as either the main file or as a dynamically
822 NAME is the file name (which will be tilde-expanded and made
823 absolute herein) (but we don't free or modify NAME itself).
824 FROM_TTY says how verbose to be. MAINLINE specifies whether this
825 is the main symbol file, or whether it's an extra symbol file such
826 as dynamically loaded code. If !mainline, ADDR is the address
827 where the text segment was loaded.
829 Upon success, returns a pointer to the objfile that was added.
830 Upon failure, jumps back to command level (never returns). */
833 symbol_file_add (name, from_tty, addrs, mainline, flags)
836 struct section_addr_info *addrs;
840 struct objfile *objfile;
841 struct partial_symtab *psymtab;
844 /* Open a bfd for the file, and give user a chance to burp if we'd be
845 interactively wiping out any existing symbols. */
847 abfd = symfile_bfd_open (name);
849 if ((have_full_symbols () || have_partial_symbols ())
852 && !query ("Load new symbol table from \"%s\"? ", name))
853 error ("Not confirmed.");
855 objfile = allocate_objfile (abfd, flags);
857 /* If the objfile uses a mapped symbol file, and we have a psymtab for
858 it, then skip reading any symbols at this time. */
860 if ((objfile->flags & OBJF_MAPPED) && (objfile->flags & OBJF_SYMS))
862 /* We mapped in an existing symbol table file that already has had
863 initial symbol reading performed, so we can skip that part. Notify
864 the user that instead of reading the symbols, they have been mapped.
866 if (from_tty || info_verbose)
868 printf_filtered ("Mapped symbols for %s...", name);
870 gdb_flush (gdb_stdout);
872 init_entry_point_info (objfile);
873 find_sym_fns (objfile);
877 /* We either created a new mapped symbol table, mapped an existing
878 symbol table file which has not had initial symbol reading
879 performed, or need to read an unmapped symbol table. */
880 if (from_tty || info_verbose)
882 if (pre_add_symbol_hook)
883 pre_add_symbol_hook (name);
886 printf_filtered ("Reading symbols from %s...", name);
888 gdb_flush (gdb_stdout);
891 syms_from_objfile (objfile, addrs, mainline, from_tty);
894 /* We now have at least a partial symbol table. Check to see if the
895 user requested that all symbols be read on initial access via either
896 the gdb startup command line or on a per symbol file basis. Expand
897 all partial symbol tables for this objfile if so. */
899 if ((flags & OBJF_READNOW) || readnow_symbol_files)
901 if (from_tty || info_verbose)
903 printf_filtered ("expanding to full symbols...");
905 gdb_flush (gdb_stdout);
908 for (psymtab = objfile->psymtabs;
910 psymtab = psymtab->next)
912 psymtab_to_symtab (psymtab);
916 if (from_tty || info_verbose)
918 if (post_add_symbol_hook)
919 post_add_symbol_hook ();
922 printf_filtered ("done.\n");
923 gdb_flush (gdb_stdout);
927 new_symfile_objfile (objfile, mainline, from_tty);
929 if (target_new_objfile_hook)
930 target_new_objfile_hook (objfile);
935 /* This is the symbol-file command. Read the file, analyze its
936 symbols, and add a struct symtab to a symtab list. The syntax of
937 the command is rather bizarre--(1) buildargv implements various
938 quoting conventions which are undocumented and have little or
939 nothing in common with the way things are quoted (or not quoted)
940 elsewhere in GDB, (2) options are used, which are not generally
941 used in GDB (perhaps "set mapped on", "set readnow on" would be
942 better), (3) the order of options matters, which is contrary to GNU
943 conventions (because it is confusing and inconvenient). */
944 /* Note: ezannoni 2000-04-17. This function used to have support for
945 rombug (see remote-os9k.c). It consisted of a call to target_link()
946 (target.c) to get the address of the text segment from the target,
947 and pass that to symbol_file_add(). This is no longer supported. */
950 symbol_file_command (args, from_tty)
956 struct cleanup *cleanups;
957 int flags = OBJF_USERLOADED;
963 if ((have_full_symbols () || have_partial_symbols ())
965 && !query ("Discard symbol table from `%s'? ",
966 symfile_objfile->name))
967 error ("Not confirmed.");
968 free_all_objfiles ();
970 /* solib descriptors may have handles to objfiles. Since their
971 storage has just been released, we'd better wipe the solib
974 #if defined(SOLIB_RESTART)
978 symfile_objfile = NULL;
980 printf_unfiltered ("No symbol file now.\n");
982 RESET_HP_UX_GLOBALS ();
987 if ((argv = buildargv (args)) == NULL)
991 cleanups = make_cleanup_freeargv (argv);
992 while (*argv != NULL)
994 if (STREQ (*argv, "-mapped"))
995 flags |= OBJF_MAPPED;
997 if (STREQ (*argv, "-readnow"))
998 flags |= OBJF_READNOW;
1001 error ("unknown option `%s'", *argv);
1005 symbol_file_add (name, from_tty, NULL, 1, flags);
1007 RESET_HP_UX_GLOBALS ();
1009 /* Getting new symbols may change our opinion about
1010 what is frameless. */
1011 reinit_frame_cache ();
1013 set_initial_language ();
1020 error ("no symbol file name was specified");
1022 TUIDO (((TuiOpaqueFuncPtr) tuiDisplayMainFunction));
1023 do_cleanups (cleanups);
1027 /* Set the initial language.
1029 A better solution would be to record the language in the psymtab when reading
1030 partial symbols, and then use it (if known) to set the language. This would
1031 be a win for formats that encode the language in an easily discoverable place,
1032 such as DWARF. For stabs, we can jump through hoops looking for specially
1033 named symbols or try to intuit the language from the specific type of stabs
1034 we find, but we can't do that until later when we read in full symbols.
1038 set_initial_language ()
1040 struct partial_symtab *pst;
1041 enum language lang = language_unknown;
1043 pst = find_main_psymtab ();
1046 if (pst->filename != NULL)
1048 lang = deduce_language_from_filename (pst->filename);
1050 if (lang == language_unknown)
1052 /* Make C the default language */
1055 set_language (lang);
1056 expected_language = current_language; /* Don't warn the user */
1060 /* Open file specified by NAME and hand it off to BFD for preliminary
1061 analysis. Result is a newly initialized bfd *, which includes a newly
1062 malloc'd` copy of NAME (tilde-expanded and made absolute).
1063 In case of trouble, error() is called. */
1066 symfile_bfd_open (name)
1071 char *absolute_name;
1075 name = tilde_expand (name); /* Returns 1st new malloc'd copy */
1077 /* Look down path for it, allocate 2nd new malloc'd copy. */
1078 desc = openp (getenv ("PATH"), 1, name, O_RDONLY | O_BINARY, 0, &absolute_name);
1079 #if defined(__GO32__) || defined(_WIN32)
1082 char *exename = alloca (strlen (name) + 5);
1083 strcat (strcpy (exename, name), ".exe");
1084 desc = openp (getenv ("PATH"), 1, exename, O_RDONLY | O_BINARY,
1090 make_cleanup (free, name);
1091 perror_with_name (name);
1093 free (name); /* Free 1st new malloc'd copy */
1094 name = absolute_name; /* Keep 2nd malloc'd copy in bfd */
1095 /* It'll be freed in free_objfile(). */
1097 sym_bfd = bfd_fdopenr (name, gnutarget, desc);
1101 make_cleanup (free, name);
1102 error ("\"%s\": can't open to read symbols: %s.", name,
1103 bfd_errmsg (bfd_get_error ()));
1105 sym_bfd->cacheable = true;
1107 if (!bfd_check_format (sym_bfd, bfd_object))
1109 /* FIXME: should be checking for errors from bfd_close (for one thing,
1110 on error it does not free all the storage associated with the
1112 bfd_close (sym_bfd); /* This also closes desc */
1113 make_cleanup (free, name);
1114 error ("\"%s\": can't read symbols: %s.", name,
1115 bfd_errmsg (bfd_get_error ()));
1120 /* Link a new symtab_fns into the global symtab_fns list. Called on gdb
1121 startup by the _initialize routine in each object file format reader,
1122 to register information about each format the the reader is prepared
1129 sf->next = symtab_fns;
1134 /* Initialize to read symbols from the symbol file sym_bfd. It either
1135 returns or calls error(). The result is an initialized struct sym_fns
1136 in the objfile structure, that contains cached information about the
1140 find_sym_fns (objfile)
1141 struct objfile *objfile;
1144 enum bfd_flavour our_flavour = bfd_get_flavour (objfile->obfd);
1145 char *our_target = bfd_get_target (objfile->obfd);
1147 /* Special kludge for RS/6000 and PowerMac. See xcoffread.c. */
1148 if (STREQ (our_target, "aixcoff-rs6000") ||
1149 STREQ (our_target, "xcoff-powermac"))
1150 our_flavour = (enum bfd_flavour) -1;
1152 /* Special kludge for apollo. See dstread.c. */
1153 if (STREQN (our_target, "apollo", 6))
1154 our_flavour = (enum bfd_flavour) -2;
1156 for (sf = symtab_fns; sf != NULL; sf = sf->next)
1158 if (our_flavour == sf->sym_flavour)
1164 error ("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown.",
1165 bfd_get_target (objfile->obfd));
1168 /* This function runs the load command of our current target. */
1171 load_command (arg, from_tty)
1176 arg = get_exec_file (1);
1177 target_load (arg, from_tty);
1180 /* This version of "load" should be usable for any target. Currently
1181 it is just used for remote targets, not inftarg.c or core files,
1182 on the theory that only in that case is it useful.
1184 Avoiding xmodem and the like seems like a win (a) because we don't have
1185 to worry about finding it, and (b) On VMS, fork() is very slow and so
1186 we don't want to run a subprocess. On the other hand, I'm not sure how
1187 performance compares. */
1189 static int download_write_size = 512;
1190 static int validate_download = 0;
1193 generic_load (char *args, int from_tty)
1197 time_t start_time, end_time; /* Start and end times of download */
1198 unsigned long data_count = 0; /* Number of bytes transferred to memory */
1199 unsigned long write_count = 0; /* Number of writes needed. */
1200 unsigned long load_offset; /* offset to add to vma for each section */
1202 struct cleanup *old_cleanups;
1204 CORE_ADDR total_size = 0;
1205 CORE_ADDR total_sent = 0;
1207 /* Parse the input argument - the user can specify a load offset as
1208 a second argument. */
1209 filename = xmalloc (strlen (args) + 1);
1210 old_cleanups = make_cleanup (free, filename);
1211 strcpy (filename, args);
1212 offptr = strchr (filename, ' ');
1216 load_offset = strtoul (offptr, &endptr, 0);
1217 if (offptr == endptr)
1218 error ("Invalid download offset:%s\n", offptr);
1224 /* Open the file for loading. */
1225 loadfile_bfd = bfd_openr (filename, gnutarget);
1226 if (loadfile_bfd == NULL)
1228 perror_with_name (filename);
1232 /* FIXME: should be checking for errors from bfd_close (for one thing,
1233 on error it does not free all the storage associated with the
1235 make_cleanup_bfd_close (loadfile_bfd);
1237 if (!bfd_check_format (loadfile_bfd, bfd_object))
1239 error ("\"%s\" is not an object file: %s", filename,
1240 bfd_errmsg (bfd_get_error ()));
1243 for (s = loadfile_bfd->sections; s; s = s->next)
1244 if (s->flags & SEC_LOAD)
1245 total_size += bfd_get_section_size_before_reloc (s);
1247 start_time = time (NULL);
1249 for (s = loadfile_bfd->sections; s; s = s->next)
1251 if (s->flags & SEC_LOAD)
1253 CORE_ADDR size = bfd_get_section_size_before_reloc (s);
1257 struct cleanup *old_chain;
1258 CORE_ADDR lma = s->lma + load_offset;
1259 CORE_ADDR block_size;
1261 const char *sect_name = bfd_get_section_name (loadfile_bfd, s);
1264 if (download_write_size > 0 && size > download_write_size)
1265 block_size = download_write_size;
1269 buffer = xmalloc (size);
1270 old_chain = make_cleanup (free, buffer);
1272 /* Is this really necessary? I guess it gives the user something
1273 to look at during a long download. */
1275 ui_out_message (uiout, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1276 sect_name, paddr_nz (size), paddr_nz (lma));
1278 fprintf_unfiltered (gdb_stdout,
1279 "Loading section %s, size 0x%s lma 0x%s\n",
1280 sect_name, paddr_nz (size), paddr_nz (lma));
1283 bfd_get_section_contents (loadfile_bfd, s, buffer, 0, size);
1289 CORE_ADDR this_transfer = size - sent;
1290 if (this_transfer >= block_size)
1291 this_transfer = block_size;
1292 len = target_write_memory_partial (lma, buffer,
1293 this_transfer, &err);
1296 if (validate_download)
1298 /* Broken memories and broken monitors manifest
1299 themselves here when bring new computers to
1300 life. This doubles already slow downloads. */
1301 /* NOTE: cagney/1999-10-18: A more efficient
1302 implementation might add a verify_memory()
1303 method to the target vector and then use
1304 that. remote.c could implement that method
1305 using the ``qCRC'' packet. */
1306 char *check = xmalloc (len);
1307 struct cleanup *verify_cleanups = make_cleanup (free, check);
1308 if (target_read_memory (lma, check, len) != 0)
1309 error ("Download verify read failed at 0x%s",
1311 if (memcmp (buffer, check, len) != 0)
1312 error ("Download verify compare failed at 0x%s",
1314 do_cleanups (verify_cleanups);
1323 || (ui_load_progress_hook != NULL
1324 && ui_load_progress_hook (sect_name, sent)))
1325 error ("Canceled the download");
1327 if (show_load_progress != NULL)
1328 show_load_progress (sect_name, sent, size, total_sent, total_size);
1330 while (sent < size);
1333 error ("Memory access error while loading section %s.", sect_name);
1335 do_cleanups (old_chain);
1340 end_time = time (NULL);
1343 entry = bfd_get_start_address (loadfile_bfd);
1345 ui_out_text (uiout, "Start address ");
1346 ui_out_field_fmt (uiout, "address", "0x%s" , paddr_nz (entry));
1347 ui_out_text (uiout, ", load size ");
1348 ui_out_field_fmt (uiout, "load-size", "%ld" , data_count);
1349 ui_out_text (uiout, "\n");
1352 fprintf_unfiltered (gdb_stdout,
1353 "Start address 0x%s , load size %ld\n",
1354 paddr_nz (entry), data_count);
1356 /* We were doing this in remote-mips.c, I suspect it is right
1357 for other targets too. */
1361 /* FIXME: are we supposed to call symbol_file_add or not? According to
1362 a comment from remote-mips.c (where a call to symbol_file_add was
1363 commented out), making the call confuses GDB if more than one file is
1364 loaded in. remote-nindy.c had no call to symbol_file_add, but remote-vx.c
1367 print_transfer_performance (gdb_stdout, data_count, write_count,
1368 end_time - start_time);
1370 do_cleanups (old_cleanups);
1373 /* Report how fast the transfer went. */
1375 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
1376 replaced by print_transfer_performance (with a very different
1377 function signature). */
1380 report_transfer_performance (data_count, start_time, end_time)
1381 unsigned long data_count;
1382 time_t start_time, end_time;
1384 print_transfer_performance (gdb_stdout, data_count, end_time - start_time, 0);
1388 print_transfer_performance (struct ui_file *stream,
1389 unsigned long data_count,
1390 unsigned long write_count,
1391 unsigned long time_count)
1394 ui_out_text (uiout, "Transfer rate: ");
1397 ui_out_field_fmt (uiout, "transfer-rate", "%ld",
1398 (data_count * 8) / time_count);
1399 ui_out_text (uiout, " bits/sec");
1403 ui_out_field_fmt (uiout, "transferred-bits", "%ld", (data_count * 8));
1404 ui_out_text (uiout, " bits in <1 sec");
1406 if (write_count > 0)
1408 ui_out_text (uiout, ", ");
1409 ui_out_field_fmt (uiout, "write-rate", "%ld", data_count / write_count);
1410 ui_out_text (uiout, " bytes/write");
1412 ui_out_text (uiout, ".\n");
1414 fprintf_unfiltered (stream, "Transfer rate: ");
1416 fprintf_unfiltered (stream, "%ld bits/sec", (data_count * 8) / time_count);
1418 fprintf_unfiltered (stream, "%ld bits in <1 sec", (data_count * 8));
1419 if (write_count > 0)
1420 fprintf_unfiltered (stream, ", %ld bytes/write", data_count / write_count);
1421 fprintf_unfiltered (stream, ".\n");
1425 /* This function allows the addition of incrementally linked object files.
1426 It does not modify any state in the target, only in the debugger. */
1427 /* Note: ezannoni 2000-04-13 This function/command used to have a
1428 special case syntax for the rombug target (Rombug is the boot
1429 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
1430 rombug case, the user doesn't need to supply a text address,
1431 instead a call to target_link() (in target.c) would supply the
1432 value to use. We are now discontinuing this type of ad hoc syntax. */
1436 add_symbol_file_command (args, from_tty)
1440 char *filename = NULL;
1441 int flags = OBJF_USERLOADED;
1443 int expecting_option = 0;
1444 int section_index = 0;
1448 int expecting_sec_name = 0;
1449 int expecting_sec_addr = 0;
1455 } sect_opts[SECT_OFF_MAX];
1457 struct section_addr_info section_addrs;
1458 struct cleanup *my_cleanups;
1463 error ("add-symbol-file takes a file name and an address");
1465 /* Make a copy of the string that we can safely write into. */
1466 args = xstrdup (args);
1468 /* Ensure section_addrs is initialized */
1469 memset (§ion_addrs, 0, sizeof (section_addrs));
1471 while (*args != '\000')
1473 /* Any leading spaces? */
1474 while (isspace (*args))
1477 /* Point arg to the beginning of the argument. */
1480 /* Move args pointer over the argument. */
1481 while ((*args != '\000') && !isspace (*args))
1484 /* If there are more arguments, terminate arg and
1486 if (*args != '\000')
1489 /* Now process the argument. */
1492 /* The first argument is the file name. */
1493 filename = tilde_expand (arg);
1494 my_cleanups = make_cleanup (free, filename);
1499 /* The second argument is always the text address at which
1500 to load the program. */
1501 sect_opts[section_index].name = ".text";
1502 sect_opts[section_index].value = arg;
1507 /* It's an option (starting with '-') or it's an argument
1512 if (strcmp (arg, "-mapped") == 0)
1513 flags |= OBJF_MAPPED;
1515 if (strcmp (arg, "-readnow") == 0)
1516 flags |= OBJF_READNOW;
1518 if (strcmp (arg, "-s") == 0)
1520 if (section_index >= SECT_OFF_MAX)
1521 error ("Too many sections specified.");
1522 expecting_sec_name = 1;
1523 expecting_sec_addr = 1;
1528 if (expecting_sec_name)
1530 sect_opts[section_index].name = arg;
1531 expecting_sec_name = 0;
1534 if (expecting_sec_addr)
1536 sect_opts[section_index].value = arg;
1537 expecting_sec_addr = 0;
1541 error ("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*");
1547 /* Print the prompt for the query below. And save the arguments into
1548 a sect_addr_info structure to be passed around to other
1549 functions. We have to split this up into separate print
1550 statements because local_hex_string returns a local static
1553 printf_filtered ("add symbol table from file \"%s\" at\n", filename);
1554 for (i = 0; i < section_index; i++)
1557 char *val = sect_opts[i].value;
1558 char *sec = sect_opts[i].name;
1560 val = sect_opts[i].value;
1561 if (val[0] == '0' && val[1] == 'x')
1562 addr = strtoul (val+2, NULL, 16);
1564 addr = strtoul (val, NULL, 10);
1566 /* Here we store the section offsets in the order they were
1567 entered on the command line. */
1568 section_addrs.other[sec_num].name = sec;
1569 section_addrs.other[sec_num].addr = addr;
1570 printf_filtered ("\t%s_addr = %s\n",
1572 local_hex_string ((unsigned long)addr));
1575 /* The object's sections are initialized when a
1576 call is made to build_objfile_section_table (objfile).
1577 This happens in reread_symbols.
1578 At this point, we don't know what file type this is,
1579 so we can't determine what section names are valid. */
1582 if (from_tty && (!query ("%s", "")))
1583 error ("Not confirmed.");
1585 symbol_file_add (filename, from_tty, §ion_addrs, 0, flags);
1587 /* Getting new symbols may change our opinion about what is
1589 reinit_frame_cache ();
1590 do_cleanups (my_cleanups);
1594 add_shared_symbol_files_command (args, from_tty)
1598 #ifdef ADD_SHARED_SYMBOL_FILES
1599 ADD_SHARED_SYMBOL_FILES (args, from_tty);
1601 error ("This command is not available in this configuration of GDB.");
1605 /* Re-read symbols if a symbol-file has changed. */
1609 struct objfile *objfile;
1612 struct stat new_statbuf;
1615 /* With the addition of shared libraries, this should be modified,
1616 the load time should be saved in the partial symbol tables, since
1617 different tables may come from different source files. FIXME.
1618 This routine should then walk down each partial symbol table
1619 and see if the symbol table that it originates from has been changed */
1621 for (objfile = object_files; objfile; objfile = objfile->next)
1625 #ifdef IBM6000_TARGET
1626 /* If this object is from a shared library, then you should
1627 stat on the library name, not member name. */
1629 if (objfile->obfd->my_archive)
1630 res = stat (objfile->obfd->my_archive->filename, &new_statbuf);
1633 res = stat (objfile->name, &new_statbuf);
1636 /* FIXME, should use print_sys_errmsg but it's not filtered. */
1637 printf_filtered ("`%s' has disappeared; keeping its symbols.\n",
1641 new_modtime = new_statbuf.st_mtime;
1642 if (new_modtime != objfile->mtime)
1644 struct cleanup *old_cleanups;
1645 struct section_offsets *offsets;
1647 char *obfd_filename;
1649 printf_filtered ("`%s' has changed; re-reading symbols.\n",
1652 /* There are various functions like symbol_file_add,
1653 symfile_bfd_open, syms_from_objfile, etc., which might
1654 appear to do what we want. But they have various other
1655 effects which we *don't* want. So we just do stuff
1656 ourselves. We don't worry about mapped files (for one thing,
1657 any mapped file will be out of date). */
1659 /* If we get an error, blow away this objfile (not sure if
1660 that is the correct response for things like shared
1662 old_cleanups = make_cleanup_free_objfile (objfile);
1663 /* We need to do this whenever any symbols go away. */
1664 make_cleanup (clear_symtab_users_cleanup, 0 /*ignore*/);
1666 /* Clean up any state BFD has sitting around. We don't need
1667 to close the descriptor but BFD lacks a way of closing the
1668 BFD without closing the descriptor. */
1669 obfd_filename = bfd_get_filename (objfile->obfd);
1670 if (!bfd_close (objfile->obfd))
1671 error ("Can't close BFD for %s: %s", objfile->name,
1672 bfd_errmsg (bfd_get_error ()));
1673 objfile->obfd = bfd_openr (obfd_filename, gnutarget);
1674 if (objfile->obfd == NULL)
1675 error ("Can't open %s to read symbols.", objfile->name);
1676 /* bfd_openr sets cacheable to true, which is what we want. */
1677 if (!bfd_check_format (objfile->obfd, bfd_object))
1678 error ("Can't read symbols from %s: %s.", objfile->name,
1679 bfd_errmsg (bfd_get_error ()));
1681 /* Save the offsets, we will nuke them with the rest of the
1683 num_offsets = objfile->num_sections;
1684 offsets = (struct section_offsets *) alloca (SIZEOF_SECTION_OFFSETS);
1685 memcpy (offsets, objfile->section_offsets, SIZEOF_SECTION_OFFSETS);
1687 /* Nuke all the state that we will re-read. Much of the following
1688 code which sets things to NULL really is necessary to tell
1689 other parts of GDB that there is nothing currently there. */
1691 /* FIXME: Do we have to free a whole linked list, or is this
1693 if (objfile->global_psymbols.list)
1694 mfree (objfile->md, objfile->global_psymbols.list);
1695 memset (&objfile->global_psymbols, 0,
1696 sizeof (objfile->global_psymbols));
1697 if (objfile->static_psymbols.list)
1698 mfree (objfile->md, objfile->static_psymbols.list);
1699 memset (&objfile->static_psymbols, 0,
1700 sizeof (objfile->static_psymbols));
1702 /* Free the obstacks for non-reusable objfiles */
1703 free_bcache (&objfile->psymbol_cache);
1704 obstack_free (&objfile->psymbol_obstack, 0);
1705 obstack_free (&objfile->symbol_obstack, 0);
1706 obstack_free (&objfile->type_obstack, 0);
1707 objfile->sections = NULL;
1708 objfile->symtabs = NULL;
1709 objfile->psymtabs = NULL;
1710 objfile->free_psymtabs = NULL;
1711 objfile->msymbols = NULL;
1712 objfile->minimal_symbol_count = 0;
1713 memset (&objfile->msymbol_hash, 0,
1714 sizeof (objfile->msymbol_hash));
1715 memset (&objfile->msymbol_demangled_hash, 0,
1716 sizeof (objfile->msymbol_demangled_hash));
1717 objfile->fundamental_types = NULL;
1718 if (objfile->sf != NULL)
1720 (*objfile->sf->sym_finish) (objfile);
1723 /* We never make this a mapped file. */
1725 /* obstack_specify_allocation also initializes the obstack so
1727 obstack_specify_allocation (&objfile->psymbol_cache.cache, 0, 0,
1729 obstack_specify_allocation (&objfile->psymbol_obstack, 0, 0,
1731 obstack_specify_allocation (&objfile->symbol_obstack, 0, 0,
1733 obstack_specify_allocation (&objfile->type_obstack, 0, 0,
1735 if (build_objfile_section_table (objfile))
1737 error ("Can't find the file sections in `%s': %s",
1738 objfile->name, bfd_errmsg (bfd_get_error ()));
1741 /* We use the same section offsets as from last time. I'm not
1742 sure whether that is always correct for shared libraries. */
1743 objfile->section_offsets = (struct section_offsets *)
1744 obstack_alloc (&objfile->psymbol_obstack, SIZEOF_SECTION_OFFSETS);
1745 memcpy (objfile->section_offsets, offsets, SIZEOF_SECTION_OFFSETS);
1746 objfile->num_sections = num_offsets;
1748 /* What the hell is sym_new_init for, anyway? The concept of
1749 distinguishing between the main file and additional files
1750 in this way seems rather dubious. */
1751 if (objfile == symfile_objfile)
1753 (*objfile->sf->sym_new_init) (objfile);
1755 RESET_HP_UX_GLOBALS ();
1759 (*objfile->sf->sym_init) (objfile);
1760 clear_complaints (1, 1);
1761 /* The "mainline" parameter is a hideous hack; I think leaving it
1762 zero is OK since dbxread.c also does what it needs to do if
1763 objfile->global_psymbols.size is 0. */
1764 (*objfile->sf->sym_read) (objfile, 0);
1765 if (!have_partial_symbols () && !have_full_symbols ())
1768 printf_filtered ("(no debugging symbols found)\n");
1771 objfile->flags |= OBJF_SYMS;
1773 /* We're done reading the symbol file; finish off complaints. */
1774 clear_complaints (0, 1);
1776 /* Getting new symbols may change our opinion about what is
1779 reinit_frame_cache ();
1781 /* Discard cleanups as symbol reading was successful. */
1782 discard_cleanups (old_cleanups);
1784 /* If the mtime has changed between the time we set new_modtime
1785 and now, we *want* this to be out of date, so don't call stat
1787 objfile->mtime = new_modtime;
1790 /* Call this after reading in a new symbol table to give target
1791 dependant code a crack at the new symbols. For instance, this
1792 could be used to update the values of target-specific symbols GDB
1793 needs to keep track of (such as _sigtramp, or whatever). */
1795 TARGET_SYMFILE_POSTREAD (objfile);
1801 clear_symtab_users ();
1813 static filename_language *filename_language_table;
1814 static int fl_table_size, fl_table_next;
1817 add_filename_language (ext, lang)
1821 if (fl_table_next >= fl_table_size)
1823 fl_table_size += 10;
1824 filename_language_table = realloc (filename_language_table,
1828 filename_language_table[fl_table_next].ext = strsave (ext);
1829 filename_language_table[fl_table_next].lang = lang;
1833 static char *ext_args;
1836 set_ext_lang_command (args, from_tty)
1841 char *cp = ext_args;
1844 /* First arg is filename extension, starting with '.' */
1846 error ("'%s': Filename extension must begin with '.'", ext_args);
1848 /* Find end of first arg. */
1849 while (*cp && !isspace (*cp))
1853 error ("'%s': two arguments required -- filename extension and language",
1856 /* Null-terminate first arg */
1859 /* Find beginning of second arg, which should be a source language. */
1860 while (*cp && isspace (*cp))
1864 error ("'%s': two arguments required -- filename extension and language",
1867 /* Lookup the language from among those we know. */
1868 lang = language_enum (cp);
1870 /* Now lookup the filename extension: do we already know it? */
1871 for (i = 0; i < fl_table_next; i++)
1872 if (0 == strcmp (ext_args, filename_language_table[i].ext))
1875 if (i >= fl_table_next)
1877 /* new file extension */
1878 add_filename_language (ext_args, lang);
1882 /* redefining a previously known filename extension */
1885 /* query ("Really make files of type %s '%s'?", */
1886 /* ext_args, language_str (lang)); */
1888 free (filename_language_table[i].ext);
1889 filename_language_table[i].ext = strsave (ext_args);
1890 filename_language_table[i].lang = lang;
1895 info_ext_lang_command (args, from_tty)
1901 printf_filtered ("Filename extensions and the languages they represent:");
1902 printf_filtered ("\n\n");
1903 for (i = 0; i < fl_table_next; i++)
1904 printf_filtered ("\t%s\t- %s\n",
1905 filename_language_table[i].ext,
1906 language_str (filename_language_table[i].lang));
1910 init_filename_language_table ()
1912 if (fl_table_size == 0) /* protect against repetition */
1916 filename_language_table =
1917 xmalloc (fl_table_size * sizeof (*filename_language_table));
1918 add_filename_language (".c", language_c);
1919 add_filename_language (".C", language_cplus);
1920 add_filename_language (".cc", language_cplus);
1921 add_filename_language (".cp", language_cplus);
1922 add_filename_language (".cpp", language_cplus);
1923 add_filename_language (".cxx", language_cplus);
1924 add_filename_language (".c++", language_cplus);
1925 add_filename_language (".java", language_java);
1926 add_filename_language (".class", language_java);
1927 add_filename_language (".ch", language_chill);
1928 add_filename_language (".c186", language_chill);
1929 add_filename_language (".c286", language_chill);
1930 add_filename_language (".f", language_fortran);
1931 add_filename_language (".F", language_fortran);
1932 add_filename_language (".s", language_asm);
1933 add_filename_language (".S", language_asm);
1938 deduce_language_from_filename (filename)
1944 if (filename != NULL)
1945 if ((cp = strrchr (filename, '.')) != NULL)
1946 for (i = 0; i < fl_table_next; i++)
1947 if (strcmp (cp, filename_language_table[i].ext) == 0)
1948 return filename_language_table[i].lang;
1950 return language_unknown;
1955 Allocate and partly initialize a new symbol table. Return a pointer
1956 to it. error() if no space.
1958 Caller must set these fields:
1964 possibly free_named_symtabs (symtab->filename);
1968 allocate_symtab (filename, objfile)
1970 struct objfile *objfile;
1972 register struct symtab *symtab;
1974 symtab = (struct symtab *)
1975 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symtab));
1976 memset (symtab, 0, sizeof (*symtab));
1977 symtab->filename = obsavestring (filename, strlen (filename),
1978 &objfile->symbol_obstack);
1979 symtab->fullname = NULL;
1980 symtab->language = deduce_language_from_filename (filename);
1981 symtab->debugformat = obsavestring ("unknown", 7,
1982 &objfile->symbol_obstack);
1984 /* Hook it to the objfile it comes from */
1986 symtab->objfile = objfile;
1987 symtab->next = objfile->symtabs;
1988 objfile->symtabs = symtab;
1990 /* FIXME: This should go away. It is only defined for the Z8000,
1991 and the Z8000 definition of this macro doesn't have anything to
1992 do with the now-nonexistent EXTRA_SYMTAB_INFO macro, it's just
1993 here for convenience. */
1994 #ifdef INIT_EXTRA_SYMTAB_INFO
1995 INIT_EXTRA_SYMTAB_INFO (symtab);
2001 struct partial_symtab *
2002 allocate_psymtab (filename, objfile)
2004 struct objfile *objfile;
2006 struct partial_symtab *psymtab;
2008 if (objfile->free_psymtabs)
2010 psymtab = objfile->free_psymtabs;
2011 objfile->free_psymtabs = psymtab->next;
2014 psymtab = (struct partial_symtab *)
2015 obstack_alloc (&objfile->psymbol_obstack,
2016 sizeof (struct partial_symtab));
2018 memset (psymtab, 0, sizeof (struct partial_symtab));
2019 psymtab->filename = obsavestring (filename, strlen (filename),
2020 &objfile->psymbol_obstack);
2021 psymtab->symtab = NULL;
2023 /* Prepend it to the psymtab list for the objfile it belongs to.
2024 Psymtabs are searched in most recent inserted -> least recent
2027 psymtab->objfile = objfile;
2028 psymtab->next = objfile->psymtabs;
2029 objfile->psymtabs = psymtab;
2032 struct partial_symtab **prev_pst;
2033 psymtab->objfile = objfile;
2034 psymtab->next = NULL;
2035 prev_pst = &(objfile->psymtabs);
2036 while ((*prev_pst) != NULL)
2037 prev_pst = &((*prev_pst)->next);
2038 (*prev_pst) = psymtab;
2046 discard_psymtab (pst)
2047 struct partial_symtab *pst;
2049 struct partial_symtab **prev_pst;
2052 Empty psymtabs happen as a result of header files which don't
2053 have any symbols in them. There can be a lot of them. But this
2054 check is wrong, in that a psymtab with N_SLINE entries but
2055 nothing else is not empty, but we don't realize that. Fixing
2056 that without slowing things down might be tricky. */
2058 /* First, snip it out of the psymtab chain */
2060 prev_pst = &(pst->objfile->psymtabs);
2061 while ((*prev_pst) != pst)
2062 prev_pst = &((*prev_pst)->next);
2063 (*prev_pst) = pst->next;
2065 /* Next, put it on a free list for recycling */
2067 pst->next = pst->objfile->free_psymtabs;
2068 pst->objfile->free_psymtabs = pst;
2072 /* Reset all data structures in gdb which may contain references to symbol
2076 clear_symtab_users ()
2078 /* Someday, we should do better than this, by only blowing away
2079 the things that really need to be blown. */
2080 clear_value_history ();
2082 clear_internalvars ();
2083 breakpoint_re_set ();
2084 set_default_breakpoint (0, 0, 0, 0);
2085 current_source_symtab = 0;
2086 current_source_line = 0;
2087 clear_pc_function_cache ();
2088 if (target_new_objfile_hook)
2089 target_new_objfile_hook (NULL);
2093 clear_symtab_users_cleanup (void *ignore)
2095 clear_symtab_users ();
2098 /* clear_symtab_users_once:
2100 This function is run after symbol reading, or from a cleanup.
2101 If an old symbol table was obsoleted, the old symbol table
2102 has been blown away, but the other GDB data structures that may
2103 reference it have not yet been cleared or re-directed. (The old
2104 symtab was zapped, and the cleanup queued, in free_named_symtab()
2107 This function can be queued N times as a cleanup, or called
2108 directly; it will do all the work the first time, and then will be a
2109 no-op until the next time it is queued. This works by bumping a
2110 counter at queueing time. Much later when the cleanup is run, or at
2111 the end of symbol processing (in case the cleanup is discarded), if
2112 the queued count is greater than the "done-count", we do the work
2113 and set the done-count to the queued count. If the queued count is
2114 less than or equal to the done-count, we just ignore the call. This
2115 is needed because reading a single .o file will often replace many
2116 symtabs (one per .h file, for example), and we don't want to reset
2117 the breakpoints N times in the user's face.
2119 The reason we both queue a cleanup, and call it directly after symbol
2120 reading, is because the cleanup protects us in case of errors, but is
2121 discarded if symbol reading is successful. */
2124 /* FIXME: As free_named_symtabs is currently a big noop this function
2125 is no longer needed. */
2127 clear_symtab_users_once PARAMS ((void));
2129 static int clear_symtab_users_queued;
2130 static int clear_symtab_users_done;
2133 clear_symtab_users_once ()
2135 /* Enforce once-per-`do_cleanups'-semantics */
2136 if (clear_symtab_users_queued <= clear_symtab_users_done)
2138 clear_symtab_users_done = clear_symtab_users_queued;
2140 clear_symtab_users ();
2144 /* Delete the specified psymtab, and any others that reference it. */
2147 cashier_psymtab (pst)
2148 struct partial_symtab *pst;
2150 struct partial_symtab *ps, *pprev = NULL;
2153 /* Find its previous psymtab in the chain */
2154 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2163 /* Unhook it from the chain. */
2164 if (ps == pst->objfile->psymtabs)
2165 pst->objfile->psymtabs = ps->next;
2167 pprev->next = ps->next;
2169 /* FIXME, we can't conveniently deallocate the entries in the
2170 partial_symbol lists (global_psymbols/static_psymbols) that
2171 this psymtab points to. These just take up space until all
2172 the psymtabs are reclaimed. Ditto the dependencies list and
2173 filename, which are all in the psymbol_obstack. */
2175 /* We need to cashier any psymtab that has this one as a dependency... */
2177 for (ps = pst->objfile->psymtabs; ps; ps = ps->next)
2179 for (i = 0; i < ps->number_of_dependencies; i++)
2181 if (ps->dependencies[i] == pst)
2183 cashier_psymtab (ps);
2184 goto again; /* Must restart, chain has been munged. */
2191 /* If a symtab or psymtab for filename NAME is found, free it along
2192 with any dependent breakpoints, displays, etc.
2193 Used when loading new versions of object modules with the "add-file"
2194 command. This is only called on the top-level symtab or psymtab's name;
2195 it is not called for subsidiary files such as .h files.
2197 Return value is 1 if we blew away the environment, 0 if not.
2198 FIXME. The return valu appears to never be used.
2200 FIXME. I think this is not the best way to do this. We should
2201 work on being gentler to the environment while still cleaning up
2202 all stray pointers into the freed symtab. */
2205 free_named_symtabs (name)
2209 /* FIXME: With the new method of each objfile having it's own
2210 psymtab list, this function needs serious rethinking. In particular,
2211 why was it ever necessary to toss psymtabs with specific compilation
2212 unit filenames, as opposed to all psymtabs from a particular symbol
2214 Well, the answer is that some systems permit reloading of particular
2215 compilation units. We want to blow away any old info about these
2216 compilation units, regardless of which objfiles they arrived in. --gnu. */
2218 register struct symtab *s;
2219 register struct symtab *prev;
2220 register struct partial_symtab *ps;
2221 struct blockvector *bv;
2224 /* We only wack things if the symbol-reload switch is set. */
2225 if (!symbol_reloading)
2228 /* Some symbol formats have trouble providing file names... */
2229 if (name == 0 || *name == '\0')
2232 /* Look for a psymtab with the specified name. */
2235 for (ps = partial_symtab_list; ps; ps = ps->next)
2237 if (STREQ (name, ps->filename))
2239 cashier_psymtab (ps); /* Blow it away...and its little dog, too. */
2240 goto again2; /* Must restart, chain has been munged */
2244 /* Look for a symtab with the specified name. */
2246 for (s = symtab_list; s; s = s->next)
2248 if (STREQ (name, s->filename))
2255 if (s == symtab_list)
2256 symtab_list = s->next;
2258 prev->next = s->next;
2260 /* For now, queue a delete for all breakpoints, displays, etc., whether
2261 or not they depend on the symtab being freed. This should be
2262 changed so that only those data structures affected are deleted. */
2264 /* But don't delete anything if the symtab is empty.
2265 This test is necessary due to a bug in "dbxread.c" that
2266 causes empty symtabs to be created for N_SO symbols that
2267 contain the pathname of the object file. (This problem
2268 has been fixed in GDB 3.9x). */
2270 bv = BLOCKVECTOR (s);
2271 if (BLOCKVECTOR_NBLOCKS (bv) > 2
2272 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK))
2273 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK)))
2275 complain (&oldsyms_complaint, name);
2277 clear_symtab_users_queued++;
2278 make_cleanup (clear_symtab_users_once, 0);
2283 complain (&empty_symtab_complaint, name);
2290 /* It is still possible that some breakpoints will be affected
2291 even though no symtab was found, since the file might have
2292 been compiled without debugging, and hence not be associated
2293 with a symtab. In order to handle this correctly, we would need
2294 to keep a list of text address ranges for undebuggable files.
2295 For now, we do nothing, since this is a fairly obscure case. */
2299 /* FIXME, what about the minimal symbol table? */
2306 /* Allocate and partially fill a partial symtab. It will be
2307 completely filled at the end of the symbol list.
2309 FILENAME is the name of the symbol-file we are reading from. */
2311 struct partial_symtab *
2312 start_psymtab_common (objfile, section_offsets,
2313 filename, textlow, global_syms, static_syms)
2314 struct objfile *objfile;
2315 struct section_offsets *section_offsets;
2318 struct partial_symbol **global_syms;
2319 struct partial_symbol **static_syms;
2321 struct partial_symtab *psymtab;
2323 psymtab = allocate_psymtab (filename, objfile);
2324 psymtab->section_offsets = section_offsets;
2325 psymtab->textlow = textlow;
2326 psymtab->texthigh = psymtab->textlow; /* default */
2327 psymtab->globals_offset = global_syms - objfile->global_psymbols.list;
2328 psymtab->statics_offset = static_syms - objfile->static_psymbols.list;
2332 /* Add a symbol with a long value to a psymtab.
2333 Since one arg is a struct, we pass in a ptr and deref it (sigh). */
2336 add_psymbol_to_list (name, namelength, namespace, class, list, val, coreaddr,
2340 namespace_enum namespace;
2341 enum address_class class;
2342 struct psymbol_allocation_list *list;
2343 long val; /* Value as a long */
2344 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2345 enum language language;
2346 struct objfile *objfile;
2348 register struct partial_symbol *psym;
2349 char *buf = alloca (namelength + 1);
2350 /* psymbol is static so that there will be no uninitialized gaps in the
2351 structure which might contain random data, causing cache misses in
2353 static struct partial_symbol psymbol;
2355 /* Create local copy of the partial symbol */
2356 memcpy (buf, name, namelength);
2357 buf[namelength] = '\0';
2358 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2359 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2362 SYMBOL_VALUE (&psymbol) = val;
2366 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2368 SYMBOL_SECTION (&psymbol) = 0;
2369 SYMBOL_LANGUAGE (&psymbol) = language;
2370 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2371 PSYMBOL_CLASS (&psymbol) = class;
2372 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2374 /* Stash the partial symbol away in the cache */
2375 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2377 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2378 if (list->next >= list->list + list->size)
2380 extend_psymbol_list (list, objfile);
2382 *list->next++ = psym;
2383 OBJSTAT (objfile, n_psyms++);
2386 /* Add a symbol with a long value to a psymtab. This differs from
2387 * add_psymbol_to_list above in taking both a mangled and a demangled
2391 add_psymbol_with_dem_name_to_list (name, namelength, dem_name, dem_namelength,
2392 namespace, class, list, val, coreaddr, language, objfile)
2397 namespace_enum namespace;
2398 enum address_class class;
2399 struct psymbol_allocation_list *list;
2400 long val; /* Value as a long */
2401 CORE_ADDR coreaddr; /* Value as a CORE_ADDR */
2402 enum language language;
2403 struct objfile *objfile;
2405 register struct partial_symbol *psym;
2406 char *buf = alloca (namelength + 1);
2407 /* psymbol is static so that there will be no uninitialized gaps in the
2408 structure which might contain random data, causing cache misses in
2410 static struct partial_symbol psymbol;
2412 /* Create local copy of the partial symbol */
2414 memcpy (buf, name, namelength);
2415 buf[namelength] = '\0';
2416 SYMBOL_NAME (&psymbol) = bcache (buf, namelength + 1, &objfile->psymbol_cache);
2418 buf = alloca (dem_namelength + 1);
2419 memcpy (buf, dem_name, dem_namelength);
2420 buf[dem_namelength] = '\0';
2425 case language_cplus:
2426 SYMBOL_CPLUS_DEMANGLED_NAME (&psymbol) =
2427 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2429 case language_chill:
2430 SYMBOL_CHILL_DEMANGLED_NAME (&psymbol) =
2431 bcache (buf, dem_namelength + 1, &objfile->psymbol_cache);
2433 /* FIXME What should be done for the default case? Ignoring for now. */
2436 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
2439 SYMBOL_VALUE (&psymbol) = val;
2443 SYMBOL_VALUE_ADDRESS (&psymbol) = coreaddr;
2445 SYMBOL_SECTION (&psymbol) = 0;
2446 SYMBOL_LANGUAGE (&psymbol) = language;
2447 PSYMBOL_NAMESPACE (&psymbol) = namespace;
2448 PSYMBOL_CLASS (&psymbol) = class;
2449 SYMBOL_INIT_LANGUAGE_SPECIFIC (&psymbol, language);
2451 /* Stash the partial symbol away in the cache */
2452 psym = bcache (&psymbol, sizeof (struct partial_symbol), &objfile->psymbol_cache);
2454 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
2455 if (list->next >= list->list + list->size)
2457 extend_psymbol_list (list, objfile);
2459 *list->next++ = psym;
2460 OBJSTAT (objfile, n_psyms++);
2463 /* Initialize storage for partial symbols. */
2466 init_psymbol_list (objfile, total_symbols)
2467 struct objfile *objfile;
2470 /* Free any previously allocated psymbol lists. */
2472 if (objfile->global_psymbols.list)
2474 mfree (objfile->md, (PTR) objfile->global_psymbols.list);
2476 if (objfile->static_psymbols.list)
2478 mfree (objfile->md, (PTR) objfile->static_psymbols.list);
2481 /* Current best guess is that approximately a twentieth
2482 of the total symbols (in a debugging file) are global or static
2485 objfile->global_psymbols.size = total_symbols / 10;
2486 objfile->static_psymbols.size = total_symbols / 10;
2488 if (objfile->global_psymbols.size > 0)
2490 objfile->global_psymbols.next =
2491 objfile->global_psymbols.list = (struct partial_symbol **)
2492 xmmalloc (objfile->md, (objfile->global_psymbols.size
2493 * sizeof (struct partial_symbol *)));
2495 if (objfile->static_psymbols.size > 0)
2497 objfile->static_psymbols.next =
2498 objfile->static_psymbols.list = (struct partial_symbol **)
2499 xmmalloc (objfile->md, (objfile->static_psymbols.size
2500 * sizeof (struct partial_symbol *)));
2505 The following code implements an abstraction for debugging overlay sections.
2507 The target model is as follows:
2508 1) The gnu linker will permit multiple sections to be mapped into the
2509 same VMA, each with its own unique LMA (or load address).
2510 2) It is assumed that some runtime mechanism exists for mapping the
2511 sections, one by one, from the load address into the VMA address.
2512 3) This code provides a mechanism for gdb to keep track of which
2513 sections should be considered to be mapped from the VMA to the LMA.
2514 This information is used for symbol lookup, and memory read/write.
2515 For instance, if a section has been mapped then its contents
2516 should be read from the VMA, otherwise from the LMA.
2518 Two levels of debugger support for overlays are available. One is
2519 "manual", in which the debugger relies on the user to tell it which
2520 overlays are currently mapped. This level of support is
2521 implemented entirely in the core debugger, and the information about
2522 whether a section is mapped is kept in the objfile->obj_section table.
2524 The second level of support is "automatic", and is only available if
2525 the target-specific code provides functionality to read the target's
2526 overlay mapping table, and translate its contents for the debugger
2527 (by updating the mapped state information in the obj_section tables).
2529 The interface is as follows:
2531 overlay map <name> -- tell gdb to consider this section mapped
2532 overlay unmap <name> -- tell gdb to consider this section unmapped
2533 overlay list -- list the sections that GDB thinks are mapped
2534 overlay read-target -- get the target's state of what's mapped
2535 overlay off/manual/auto -- set overlay debugging state
2536 Functional interface:
2537 find_pc_mapped_section(pc): if the pc is in the range of a mapped
2538 section, return that section.
2539 find_pc_overlay(pc): find any overlay section that contains
2540 the pc, either in its VMA or its LMA
2541 overlay_is_mapped(sect): true if overlay is marked as mapped
2542 section_is_overlay(sect): true if section's VMA != LMA
2543 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
2544 pc_in_unmapped_range(...): true if pc belongs to section's LMA
2545 overlay_mapped_address(...): map an address from section's LMA to VMA
2546 overlay_unmapped_address(...): map an address from section's VMA to LMA
2547 symbol_overlayed_address(...): Return a "current" address for symbol:
2548 either in VMA or LMA depending on whether
2549 the symbol's section is currently mapped
2552 /* Overlay debugging state: */
2554 int overlay_debugging = 0; /* 0 == off, 1 == manual, -1 == auto */
2555 int overlay_cache_invalid = 0; /* True if need to refresh mapped state */
2557 /* Target vector for refreshing overlay mapped state */
2558 static void simple_overlay_update PARAMS ((struct obj_section *));
2559 void (*target_overlay_update) PARAMS ((struct obj_section *))
2560 = simple_overlay_update;
2562 /* Function: section_is_overlay (SECTION)
2563 Returns true if SECTION has VMA not equal to LMA, ie.
2564 SECTION is loaded at an address different from where it will "run". */
2567 section_is_overlay (section)
2570 if (overlay_debugging)
2571 if (section && section->lma != 0 &&
2572 section->vma != section->lma)
2578 /* Function: overlay_invalidate_all (void)
2579 Invalidate the mapped state of all overlay sections (mark it as stale). */
2582 overlay_invalidate_all ()
2584 struct objfile *objfile;
2585 struct obj_section *sect;
2587 ALL_OBJSECTIONS (objfile, sect)
2588 if (section_is_overlay (sect->the_bfd_section))
2589 sect->ovly_mapped = -1;
2592 /* Function: overlay_is_mapped (SECTION)
2593 Returns true if section is an overlay, and is currently mapped.
2594 Private: public access is thru function section_is_mapped.
2596 Access to the ovly_mapped flag is restricted to this function, so
2597 that we can do automatic update. If the global flag
2598 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
2599 overlay_invalidate_all. If the mapped state of the particular
2600 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
2603 overlay_is_mapped (osect)
2604 struct obj_section *osect;
2606 if (osect == 0 || !section_is_overlay (osect->the_bfd_section))
2609 switch (overlay_debugging)
2613 return 0; /* overlay debugging off */
2614 case -1: /* overlay debugging automatic */
2615 /* Unles there is a target_overlay_update function,
2616 there's really nothing useful to do here (can't really go auto) */
2617 if (target_overlay_update)
2619 if (overlay_cache_invalid)
2621 overlay_invalidate_all ();
2622 overlay_cache_invalid = 0;
2624 if (osect->ovly_mapped == -1)
2625 (*target_overlay_update) (osect);
2627 /* fall thru to manual case */
2628 case 1: /* overlay debugging manual */
2629 return osect->ovly_mapped == 1;
2633 /* Function: section_is_mapped
2634 Returns true if section is an overlay, and is currently mapped. */
2637 section_is_mapped (section)
2640 struct objfile *objfile;
2641 struct obj_section *osect;
2643 if (overlay_debugging)
2644 if (section && section_is_overlay (section))
2645 ALL_OBJSECTIONS (objfile, osect)
2646 if (osect->the_bfd_section == section)
2647 return overlay_is_mapped (osect);
2652 /* Function: pc_in_unmapped_range
2653 If PC falls into the lma range of SECTION, return true, else false. */
2656 pc_in_unmapped_range (pc, section)
2662 if (overlay_debugging)
2663 if (section && section_is_overlay (section))
2665 size = bfd_get_section_size_before_reloc (section);
2666 if (section->lma <= pc && pc < section->lma + size)
2672 /* Function: pc_in_mapped_range
2673 If PC falls into the vma range of SECTION, return true, else false. */
2676 pc_in_mapped_range (pc, section)
2682 if (overlay_debugging)
2683 if (section && section_is_overlay (section))
2685 size = bfd_get_section_size_before_reloc (section);
2686 if (section->vma <= pc && pc < section->vma + size)
2692 /* Function: overlay_unmapped_address (PC, SECTION)
2693 Returns the address corresponding to PC in the unmapped (load) range.
2694 May be the same as PC. */
2697 overlay_unmapped_address (pc, section)
2701 if (overlay_debugging)
2702 if (section && section_is_overlay (section) &&
2703 pc_in_mapped_range (pc, section))
2704 return pc + section->lma - section->vma;
2709 /* Function: overlay_mapped_address (PC, SECTION)
2710 Returns the address corresponding to PC in the mapped (runtime) range.
2711 May be the same as PC. */
2714 overlay_mapped_address (pc, section)
2718 if (overlay_debugging)
2719 if (section && section_is_overlay (section) &&
2720 pc_in_unmapped_range (pc, section))
2721 return pc + section->vma - section->lma;
2727 /* Function: symbol_overlayed_address
2728 Return one of two addresses (relative to the VMA or to the LMA),
2729 depending on whether the section is mapped or not. */
2732 symbol_overlayed_address (address, section)
2736 if (overlay_debugging)
2738 /* If the symbol has no section, just return its regular address. */
2741 /* If the symbol's section is not an overlay, just return its address */
2742 if (!section_is_overlay (section))
2744 /* If the symbol's section is mapped, just return its address */
2745 if (section_is_mapped (section))
2748 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
2749 * then return its LOADED address rather than its vma address!!
2751 return overlay_unmapped_address (address, section);
2756 /* Function: find_pc_overlay (PC)
2757 Return the best-match overlay section for PC:
2758 If PC matches a mapped overlay section's VMA, return that section.
2759 Else if PC matches an unmapped section's VMA, return that section.
2760 Else if PC matches an unmapped section's LMA, return that section. */
2763 find_pc_overlay (pc)
2766 struct objfile *objfile;
2767 struct obj_section *osect, *best_match = NULL;
2769 if (overlay_debugging)
2770 ALL_OBJSECTIONS (objfile, osect)
2771 if (section_is_overlay (osect->the_bfd_section))
2773 if (pc_in_mapped_range (pc, osect->the_bfd_section))
2775 if (overlay_is_mapped (osect))
2776 return osect->the_bfd_section;
2780 else if (pc_in_unmapped_range (pc, osect->the_bfd_section))
2783 return best_match ? best_match->the_bfd_section : NULL;
2786 /* Function: find_pc_mapped_section (PC)
2787 If PC falls into the VMA address range of an overlay section that is
2788 currently marked as MAPPED, return that section. Else return NULL. */
2791 find_pc_mapped_section (pc)
2794 struct objfile *objfile;
2795 struct obj_section *osect;
2797 if (overlay_debugging)
2798 ALL_OBJSECTIONS (objfile, osect)
2799 if (pc_in_mapped_range (pc, osect->the_bfd_section) &&
2800 overlay_is_mapped (osect))
2801 return osect->the_bfd_section;
2806 /* Function: list_overlays_command
2807 Print a list of mapped sections and their PC ranges */
2810 list_overlays_command (args, from_tty)
2815 struct objfile *objfile;
2816 struct obj_section *osect;
2818 if (overlay_debugging)
2819 ALL_OBJSECTIONS (objfile, osect)
2820 if (overlay_is_mapped (osect))
2826 vma = bfd_section_vma (objfile->obfd, osect->the_bfd_section);
2827 lma = bfd_section_lma (objfile->obfd, osect->the_bfd_section);
2828 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
2829 name = bfd_section_name (objfile->obfd, osect->the_bfd_section);
2831 printf_filtered ("Section %s, loaded at ", name);
2832 print_address_numeric (lma, 1, gdb_stdout);
2833 puts_filtered (" - ");
2834 print_address_numeric (lma + size, 1, gdb_stdout);
2835 printf_filtered (", mapped at ");
2836 print_address_numeric (vma, 1, gdb_stdout);
2837 puts_filtered (" - ");
2838 print_address_numeric (vma + size, 1, gdb_stdout);
2839 puts_filtered ("\n");
2844 printf_filtered ("No sections are mapped.\n");
2847 /* Function: map_overlay_command
2848 Mark the named section as mapped (ie. residing at its VMA address). */
2851 map_overlay_command (args, from_tty)
2855 struct objfile *objfile, *objfile2;
2856 struct obj_section *sec, *sec2;
2859 if (!overlay_debugging)
2861 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2862 the 'overlay manual' command.");
2864 if (args == 0 || *args == 0)
2865 error ("Argument required: name of an overlay section");
2867 /* First, find a section matching the user supplied argument */
2868 ALL_OBJSECTIONS (objfile, sec)
2869 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2871 /* Now, check to see if the section is an overlay. */
2872 bfdsec = sec->the_bfd_section;
2873 if (!section_is_overlay (bfdsec))
2874 continue; /* not an overlay section */
2876 /* Mark the overlay as "mapped" */
2877 sec->ovly_mapped = 1;
2879 /* Next, make a pass and unmap any sections that are
2880 overlapped by this new section: */
2881 ALL_OBJSECTIONS (objfile2, sec2)
2882 if (sec2->ovly_mapped &&
2884 sec->the_bfd_section != sec2->the_bfd_section &&
2885 (pc_in_mapped_range (sec2->addr, sec->the_bfd_section) ||
2886 pc_in_mapped_range (sec2->endaddr, sec->the_bfd_section)))
2889 printf_filtered ("Note: section %s unmapped by overlap\n",
2890 bfd_section_name (objfile->obfd,
2891 sec2->the_bfd_section));
2892 sec2->ovly_mapped = 0; /* sec2 overlaps sec: unmap sec2 */
2896 error ("No overlay section called %s", args);
2899 /* Function: unmap_overlay_command
2900 Mark the overlay section as unmapped
2901 (ie. resident in its LMA address range, rather than the VMA range). */
2904 unmap_overlay_command (args, from_tty)
2908 struct objfile *objfile;
2909 struct obj_section *sec;
2911 if (!overlay_debugging)
2913 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
2914 the 'overlay manual' command.");
2916 if (args == 0 || *args == 0)
2917 error ("Argument required: name of an overlay section");
2919 /* First, find a section matching the user supplied argument */
2920 ALL_OBJSECTIONS (objfile, sec)
2921 if (!strcmp (bfd_section_name (objfile->obfd, sec->the_bfd_section), args))
2923 if (!sec->ovly_mapped)
2924 error ("Section %s is not mapped", args);
2925 sec->ovly_mapped = 0;
2928 error ("No overlay section called %s", args);
2931 /* Function: overlay_auto_command
2932 A utility command to turn on overlay debugging.
2933 Possibly this should be done via a set/show command. */
2936 overlay_auto_command (args, from_tty)
2940 overlay_debugging = -1;
2942 printf_filtered ("Automatic overlay debugging enabled.");
2945 /* Function: overlay_manual_command
2946 A utility command to turn on overlay debugging.
2947 Possibly this should be done via a set/show command. */
2950 overlay_manual_command (args, from_tty)
2954 overlay_debugging = 1;
2956 printf_filtered ("Overlay debugging enabled.");
2959 /* Function: overlay_off_command
2960 A utility command to turn on overlay debugging.
2961 Possibly this should be done via a set/show command. */
2964 overlay_off_command (args, from_tty)
2968 overlay_debugging = 0;
2970 printf_filtered ("Overlay debugging disabled.");
2974 overlay_load_command (args, from_tty)
2978 if (target_overlay_update)
2979 (*target_overlay_update) (NULL);
2981 error ("This target does not know how to read its overlay state.");
2984 /* Function: overlay_command
2985 A place-holder for a mis-typed command */
2987 /* Command list chain containing all defined "overlay" subcommands. */
2988 struct cmd_list_element *overlaylist;
2991 overlay_command (args, from_tty)
2996 ("\"overlay\" must be followed by the name of an overlay command.\n");
2997 help_list (overlaylist, "overlay ", -1, gdb_stdout);
3001 /* Target Overlays for the "Simplest" overlay manager:
3003 This is GDB's default target overlay layer. It works with the
3004 minimal overlay manager supplied as an example by Cygnus. The
3005 entry point is via a function pointer "target_overlay_update",
3006 so targets that use a different runtime overlay manager can
3007 substitute their own overlay_update function and take over the
3010 The overlay_update function pokes around in the target's data structures
3011 to see what overlays are mapped, and updates GDB's overlay mapping with
3014 In this simple implementation, the target data structures are as follows:
3015 unsigned _novlys; /# number of overlay sections #/
3016 unsigned _ovly_table[_novlys][4] = {
3017 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3018 {..., ..., ..., ...},
3020 unsigned _novly_regions; /# number of overlay regions #/
3021 unsigned _ovly_region_table[_novly_regions][3] = {
3022 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3025 These functions will attempt to update GDB's mappedness state in the
3026 symbol section table, based on the target's mappedness state.
3028 To do this, we keep a cached copy of the target's _ovly_table, and
3029 attempt to detect when the cached copy is invalidated. The main
3030 entry point is "simple_overlay_update(SECT), which looks up SECT in
3031 the cached table and re-reads only the entry for that section from
3032 the target (whenever possible).
3035 /* Cached, dynamically allocated copies of the target data structures: */
3036 static unsigned (*cache_ovly_table)[4] = 0;
3038 static unsigned (*cache_ovly_region_table)[3] = 0;
3040 static unsigned cache_novlys = 0;
3042 static unsigned cache_novly_regions = 0;
3044 static CORE_ADDR cache_ovly_table_base = 0;
3046 static CORE_ADDR cache_ovly_region_table_base = 0;
3050 VMA, SIZE, LMA, MAPPED
3052 #define TARGET_LONG_BYTES (TARGET_LONG_BIT / TARGET_CHAR_BIT)
3054 /* Throw away the cached copy of _ovly_table */
3056 simple_free_overlay_table ()
3058 if (cache_ovly_table)
3059 free (cache_ovly_table);
3061 cache_ovly_table = NULL;
3062 cache_ovly_table_base = 0;
3066 /* Throw away the cached copy of _ovly_region_table */
3068 simple_free_overlay_region_table ()
3070 if (cache_ovly_region_table)
3071 free (cache_ovly_region_table);
3072 cache_novly_regions = 0;
3073 cache_ovly_region_table = NULL;
3074 cache_ovly_region_table_base = 0;
3078 /* Read an array of ints from the target into a local buffer.
3079 Convert to host order. int LEN is number of ints */
3081 read_target_long_array (memaddr, myaddr, len)
3083 unsigned int *myaddr;
3086 char *buf = alloca (len * TARGET_LONG_BYTES);
3089 read_memory (memaddr, buf, len * TARGET_LONG_BYTES);
3090 for (i = 0; i < len; i++)
3091 myaddr[i] = extract_unsigned_integer (TARGET_LONG_BYTES * i + buf,
3095 /* Find and grab a copy of the target _ovly_table
3096 (and _novlys, which is needed for the table's size) */
3098 simple_read_overlay_table ()
3100 struct minimal_symbol *msym;
3102 simple_free_overlay_table ();
3103 msym = lookup_minimal_symbol ("_novlys", 0, 0);
3105 cache_novlys = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3107 return 0; /* failure */
3108 cache_ovly_table = (void *) xmalloc (cache_novlys * sizeof (*cache_ovly_table));
3109 if (cache_ovly_table != NULL)
3111 msym = lookup_minimal_symbol ("_ovly_table", 0, 0);
3114 cache_ovly_table_base = SYMBOL_VALUE_ADDRESS (msym);
3115 read_target_long_array (cache_ovly_table_base,
3116 (int *) cache_ovly_table,
3120 return 0; /* failure */
3123 return 0; /* failure */
3124 return 1; /* SUCCESS */
3128 /* Find and grab a copy of the target _ovly_region_table
3129 (and _novly_regions, which is needed for the table's size) */
3131 simple_read_overlay_region_table ()
3133 struct minimal_symbol *msym;
3135 simple_free_overlay_region_table ();
3136 msym = lookup_minimal_symbol ("_novly_regions", 0, 0);
3138 cache_novly_regions = read_memory_integer (SYMBOL_VALUE_ADDRESS (msym), 4);
3140 return 0; /* failure */
3141 cache_ovly_region_table = (void *) xmalloc (cache_novly_regions * 12);
3142 if (cache_ovly_region_table != NULL)
3144 msym = lookup_minimal_symbol ("_ovly_region_table", 0, 0);
3147 cache_ovly_region_table_base = SYMBOL_VALUE_ADDRESS (msym);
3148 read_target_long_array (cache_ovly_region_table_base,
3149 (int *) cache_ovly_region_table,
3150 cache_novly_regions * 3);
3153 return 0; /* failure */
3156 return 0; /* failure */
3157 return 1; /* SUCCESS */
3161 /* Function: simple_overlay_update_1
3162 A helper function for simple_overlay_update. Assuming a cached copy
3163 of _ovly_table exists, look through it to find an entry whose vma,
3164 lma and size match those of OSECT. Re-read the entry and make sure
3165 it still matches OSECT (else the table may no longer be valid).
3166 Set OSECT's mapped state to match the entry. Return: 1 for
3167 success, 0 for failure. */
3170 simple_overlay_update_1 (osect)
3171 struct obj_section *osect;
3175 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3176 for (i = 0; i < cache_novlys; i++)
3177 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3178 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3179 cache_ovly_table[i][SIZE] == size */ )
3181 read_target_long_array (cache_ovly_table_base + i * TARGET_LONG_BYTES,
3182 (int *) cache_ovly_table[i], 4);
3183 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3184 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3185 cache_ovly_table[i][SIZE] == size */ )
3187 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3190 else /* Warning! Warning! Target's ovly table has changed! */
3196 /* Function: simple_overlay_update
3197 If OSECT is NULL, then update all sections' mapped state
3198 (after re-reading the entire target _ovly_table).
3199 If OSECT is non-NULL, then try to find a matching entry in the
3200 cached ovly_table and update only OSECT's mapped state.
3201 If a cached entry can't be found or the cache isn't valid, then
3202 re-read the entire cache, and go ahead and update all sections. */
3205 simple_overlay_update (osect)
3206 struct obj_section *osect;
3208 struct objfile *objfile;
3210 /* Were we given an osect to look up? NULL means do all of them. */
3212 /* Have we got a cached copy of the target's overlay table? */
3213 if (cache_ovly_table != NULL)
3214 /* Does its cached location match what's currently in the symtab? */
3215 if (cache_ovly_table_base ==
3216 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", 0, 0)))
3217 /* Then go ahead and try to look up this single section in the cache */
3218 if (simple_overlay_update_1 (osect))
3219 /* Found it! We're done. */
3222 /* Cached table no good: need to read the entire table anew.
3223 Or else we want all the sections, in which case it's actually
3224 more efficient to read the whole table in one block anyway. */
3226 if (simple_read_overlay_table () == 0) /* read failed? No table? */
3228 warning ("Failed to read the target overlay mapping table.");
3231 /* Now may as well update all sections, even if only one was requested. */
3232 ALL_OBJSECTIONS (objfile, osect)
3233 if (section_is_overlay (osect->the_bfd_section))
3237 size = bfd_get_section_size_before_reloc (osect->the_bfd_section);
3238 for (i = 0; i < cache_novlys; i++)
3239 if (cache_ovly_table[i][VMA] == osect->the_bfd_section->vma &&
3240 cache_ovly_table[i][LMA] == osect->the_bfd_section->lma /* &&
3241 cache_ovly_table[i][SIZE] == size */ )
3242 { /* obj_section matches i'th entry in ovly_table */
3243 osect->ovly_mapped = cache_ovly_table[i][MAPPED];
3244 break; /* finished with inner for loop: break out */
3251 _initialize_symfile ()
3253 struct cmd_list_element *c;
3255 c = add_cmd ("symbol-file", class_files, symbol_file_command,
3256 "Load symbol table from executable file FILE.\n\
3257 The `file' command can also load symbol tables, as well as setting the file\n\
3258 to execute.", &cmdlist);
3259 c->completer = filename_completer;
3261 c = add_cmd ("add-symbol-file", class_files, add_symbol_file_command,
3262 "Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
3263 Load the symbols from FILE, assuming FILE has been dynamically loaded.\n\
3264 ADDR is the starting address of the file's text.\n\
3265 The optional arguments are section-name section-address pairs and\n\
3266 should be specified if the data and bss segments are not contiguous\n\
3267 with the text. SECT is a section name to be loaded at SECT_ADDR.",
3269 c->completer = filename_completer;
3271 c = add_cmd ("add-shared-symbol-files", class_files,
3272 add_shared_symbol_files_command,
3273 "Load the symbols from shared objects in the dynamic linker's link map.",
3275 c = add_alias_cmd ("assf", "add-shared-symbol-files", class_files, 1,
3278 c = add_cmd ("load", class_files, load_command,
3279 "Dynamically load FILE into the running program, and record its symbols\n\
3280 for access from GDB.", &cmdlist);
3281 c->completer = filename_completer;
3284 (add_set_cmd ("symbol-reloading", class_support, var_boolean,
3285 (char *) &symbol_reloading,
3286 "Set dynamic symbol table reloading multiple times in one run.",
3290 add_prefix_cmd ("overlay", class_support, overlay_command,
3291 "Commands for debugging overlays.", &overlaylist,
3292 "overlay ", 0, &cmdlist);
3294 add_com_alias ("ovly", "overlay", class_alias, 1);
3295 add_com_alias ("ov", "overlay", class_alias, 1);
3297 add_cmd ("map-overlay", class_support, map_overlay_command,
3298 "Assert that an overlay section is mapped.", &overlaylist);
3300 add_cmd ("unmap-overlay", class_support, unmap_overlay_command,
3301 "Assert that an overlay section is unmapped.", &overlaylist);
3303 add_cmd ("list-overlays", class_support, list_overlays_command,
3304 "List mappings of overlay sections.", &overlaylist);
3306 add_cmd ("manual", class_support, overlay_manual_command,
3307 "Enable overlay debugging.", &overlaylist);
3308 add_cmd ("off", class_support, overlay_off_command,
3309 "Disable overlay debugging.", &overlaylist);
3310 add_cmd ("auto", class_support, overlay_auto_command,
3311 "Enable automatic overlay debugging.", &overlaylist);
3312 add_cmd ("load-target", class_support, overlay_load_command,
3313 "Read the overlay mapping state from the target.", &overlaylist);
3315 /* Filename extension to source language lookup table: */
3316 init_filename_language_table ();
3317 c = add_set_cmd ("extension-language", class_files, var_string_noescape,
3319 "Set mapping between filename extension and source language.\n\
3320 Usage: set extension-language .foo bar",
3322 c->function.cfunc = set_ext_lang_command;
3324 add_info ("extensions", info_ext_lang_command,
3325 "All filename extensions associated with a source language.");
3328 (add_set_cmd ("download-write-size", class_obscure,
3329 var_integer, (char *) &download_write_size,
3330 "Set the write size used when downloading a program.\n"
3331 "Only used when downloading a program onto a remote\n"
3332 "target. Specify zero, or a negative value, to disable\n"
3333 "blocked writes. The actual size of each transfer is also\n"
3334 "limited by the size of the target packet and the memory\n"