1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998
3 Free Software Foundation, Inc.
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. */
22 /* This module provides three functions: dbx_symfile_init,
23 which initializes to read a symbol file; dbx_new_init, which
24 discards existing cached information when all symbols are being
25 discarded; and dbx_symfile_read, which reads a symbol table
28 dbx_symfile_read only does the minimum work necessary for letting the
29 user "name" things symbolically; it does not read the entire symtab.
30 Instead, it reads the external and static symbols and puts them in partial
31 symbol tables. When more extensive information is requested of a
32 file, the corresponding partial symbol table is mutated into a full
33 fledged symbol table by going back and reading the symbols
34 for real. dbx_psymtab_to_symtab() is the function that does this */
37 #include "gdb_string.h"
39 #if defined(USG) || defined(__CYGNUSCLIB__)
40 #include <sys/types.h>
48 #include "breakpoint.h"
51 #include "gdbcore.h" /* for bfd stuff */
52 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
56 #include "stabsread.h"
57 #include "gdb-stabs.h"
59 #include "language.h" /* Needed inside partial-stab.h */
60 #include "complaints.h"
62 #include "aout/aout64.h"
63 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
66 /* This macro returns the size field of a minimal symbol, which is normally
67 stored in the "info" field. The macro can be overridden for specific
68 targets (e.g. MIPS16) that use the info field for other purposes. */
70 #define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
74 /* We put a pointer to this structure in the read_symtab_private field
80 /* Offset within the file symbol table of first local symbol for this
85 /* Length (in bytes) of the section of the symbol table devoted to
86 this file's symbols (actually, the section bracketed may contain
87 more than just this file's symbols). If ldsymlen is 0, the only
88 reason for this thing's existence is the dependency list. Nothing
89 else will happen when it is read in. */
93 /* The size of each symbol in the symbol file (in external form). */
97 /* Further information needed to locate the symbols if they are in
102 int file_string_offset;
105 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
106 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
107 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
108 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
109 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
110 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
111 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
114 /* Remember what we deduced to be the source language of this psymtab. */
116 static enum language psymtab_language = language_unknown;
118 /* Nonzero means give verbose info on gdb action. From main.c. */
120 extern int info_verbose;
122 /* The BFD for this file -- implicit parameter to next_symbol_text. */
124 static bfd *symfile_bfd;
126 /* The size of each symbol in the symbol file (in external form).
127 This is set by dbx_symfile_read when building psymtabs, and by
128 dbx_psymtab_to_symtab when building symtabs. */
130 static unsigned symbol_size;
132 /* This is the offset of the symbol table in the executable file. */
134 static unsigned symbol_table_offset;
136 /* This is the offset of the string table in the executable file. */
138 static unsigned string_table_offset;
140 /* For elf+stab executables, the n_strx field is not a simple index
141 into the string table. Instead, each .o file has a base offset in
142 the string table, and the associated symbols contain offsets from
143 this base. The following two variables contain the base offset for
144 the current and next .o files. */
146 static unsigned int file_string_table_offset;
147 static unsigned int next_file_string_table_offset;
149 /* .o and NLM files contain unrelocated addresses which are based at
150 0. When non-zero, this flag disables some of the special cases for
151 Solaris elf+stab text addresses at location 0. */
153 static int symfile_relocatable = 0;
155 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
156 relative to the function start address. */
158 static int block_address_function_relative = 0;
160 /* The lowest text address we have yet encountered. This is needed
161 because in an a.out file, there is no header field which tells us
162 what address the program is actually going to be loaded at, so we
163 need to make guesses based on the symbols (which *are* relocated to
164 reflect the address it will be loaded at). */
166 static CORE_ADDR lowest_text_address;
168 /* Non-zero if there is any line number info in the objfile. Prevents
169 end_psymtab from discarding an otherwise empty psymtab. */
171 static int has_line_numbers;
173 /* Complaints about the symbols we have encountered. */
175 struct complaint lbrac_complaint =
176 {"bad block start address patched", 0, 0};
178 struct complaint string_table_offset_complaint =
179 {"bad string table offset in symbol %d", 0, 0};
181 struct complaint unknown_symtype_complaint =
182 {"unknown symbol type %s", 0, 0};
184 struct complaint unknown_symchar_complaint =
185 {"unknown symbol descriptor `%c'", 0, 0};
187 struct complaint lbrac_rbrac_complaint =
188 {"block start larger than block end", 0, 0};
190 struct complaint lbrac_unmatched_complaint =
191 {"unmatched N_LBRAC before symtab pos %d", 0, 0};
193 struct complaint lbrac_mismatch_complaint =
194 {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0};
196 struct complaint repeated_header_complaint =
197 {"\"repeated\" header file %s not previously seen, at symtab pos %d", 0, 0};
199 struct complaint unclaimed_bincl_complaint =
200 {"N_BINCL %s not in entries for any file, at symtab pos %d", 0, 0};
202 /* find_text_range --- find start and end of loadable code sections
204 The find_text_range function finds the shortest address range that
205 encloses all sections containing executable code, and stores it in
206 objfile's text_addr and text_size members.
208 dbx_symfile_read will use this to finish off the partial symbol
209 table, in some cases. */
212 find_text_range (bfd * sym_bfd, struct objfile *objfile)
216 CORE_ADDR start, end;
218 for (sec = sym_bfd->sections; sec; sec = sec->next)
219 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
221 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
222 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
226 if (sec_start < start)
241 error ("Can't find any code sections in symbol file");
243 DBX_TEXT_ADDR (objfile) = start;
244 DBX_TEXT_SIZE (objfile) = end - start;
249 /* During initial symbol readin, we need to have a structure to keep
250 track of which psymtabs have which bincls in them. This structure
251 is used during readin to setup the list of dependencies within each
252 partial symbol table. */
254 struct header_file_location
256 char *name; /* Name of header file */
257 int instance; /* See above */
258 struct partial_symtab *pst; /* Partial symtab that has the
259 BINCL/EINCL defs for this file */
262 /* The actual list and controling variables */
263 static struct header_file_location *bincl_list, *next_bincl;
264 static int bincls_allocated;
266 /* Local function prototypes */
268 extern void _initialize_dbxread PARAMS ((void));
271 process_now PARAMS ((struct objfile *));
274 free_header_files PARAMS ((void));
277 init_header_files PARAMS ((void));
280 read_ofile_symtab PARAMS ((struct partial_symtab *));
283 dbx_psymtab_to_symtab PARAMS ((struct partial_symtab *));
286 dbx_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
289 read_dbx_dynamic_symtab PARAMS ((struct objfile * objfile));
292 read_dbx_symtab PARAMS ((struct objfile *));
295 free_bincl_list PARAMS ((struct objfile *));
297 static struct partial_symtab *
298 find_corresponding_bincl_psymtab PARAMS ((char *, int));
301 add_bincl_to_list PARAMS ((struct partial_symtab *, char *, int));
304 init_bincl_list PARAMS ((int, struct objfile *));
307 dbx_next_symbol_text PARAMS ((struct objfile *));
310 fill_symbuf PARAMS ((bfd *));
313 dbx_symfile_init PARAMS ((struct objfile *));
316 dbx_new_init PARAMS ((struct objfile *));
319 dbx_symfile_read PARAMS ((struct objfile *, int));
322 dbx_symfile_finish PARAMS ((struct objfile *));
325 record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *));
328 add_new_header_file PARAMS ((char *, int));
331 add_old_header_file PARAMS ((char *, int));
334 add_this_object_header_file PARAMS ((int));
336 static struct partial_symtab *
337 start_psymtab PARAMS ((struct objfile *, char *, CORE_ADDR, int,
338 struct partial_symbol **, struct partial_symbol **));
340 /* Free up old header file tables */
345 if (this_object_header_files)
347 free ((PTR) this_object_header_files);
348 this_object_header_files = NULL;
350 n_allocated_this_object_header_files = 0;
353 /* Allocate new header file tables */
358 n_allocated_this_object_header_files = 10;
359 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
362 /* Add header file number I for this object file
363 at the next successive FILENUM. */
366 add_this_object_header_file (i)
369 if (n_this_object_header_files == n_allocated_this_object_header_files)
371 n_allocated_this_object_header_files *= 2;
372 this_object_header_files
373 = (int *) xrealloc ((char *) this_object_header_files,
374 n_allocated_this_object_header_files * sizeof (int));
377 this_object_header_files[n_this_object_header_files++] = i;
380 /* Add to this file an "old" header file, one already seen in
381 a previous object file. NAME is the header file's name.
382 INSTANCE is its instance code, to select among multiple
383 symbol tables for the same header file. */
386 add_old_header_file (name, instance)
390 register struct header_file *p = HEADER_FILES (current_objfile);
393 for (i = 0; i < N_HEADER_FILES (current_objfile); i++)
394 if (STREQ (p[i].name, name) && instance == p[i].instance)
396 add_this_object_header_file (i);
399 complain (&repeated_header_complaint, name, symnum);
402 /* Add to this file a "new" header file: definitions for its types follow.
403 NAME is the header file's name.
404 Most often this happens only once for each distinct header file,
405 but not necessarily. If it happens more than once, INSTANCE has
406 a different value each time, and references to the header file
407 use INSTANCE values to select among them.
409 dbx output contains "begin" and "end" markers for each new header file,
410 but at this level we just need to know which files there have been;
411 so we record the file when its "begin" is seen and ignore the "end". */
414 add_new_header_file (name, instance)
419 register struct header_file *hfile;
421 /* Make sure there is room for one more header file. */
423 i = N_ALLOCATED_HEADER_FILES (current_objfile);
425 if (N_HEADER_FILES (current_objfile) == i)
429 N_ALLOCATED_HEADER_FILES (current_objfile) = 10;
430 HEADER_FILES (current_objfile) = (struct header_file *)
431 xmalloc (10 * sizeof (struct header_file));
436 N_ALLOCATED_HEADER_FILES (current_objfile) = i;
437 HEADER_FILES (current_objfile) = (struct header_file *)
438 xrealloc ((char *) HEADER_FILES (current_objfile),
439 (i * sizeof (struct header_file)));
443 /* Create an entry for this header file. */
445 i = N_HEADER_FILES (current_objfile)++;
446 hfile = HEADER_FILES (current_objfile) + i;
447 hfile->name = savestring (name, strlen (name));
448 hfile->instance = instance;
451 = (struct type **) xmalloc (10 * sizeof (struct type *));
452 memset (hfile->vector, 0, 10 * sizeof (struct type *));
454 add_this_object_header_file (i);
458 static struct type **
459 explicit_lookup_type (real_filenum, index)
460 int real_filenum, index;
462 register struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum];
464 if (index >= f->length)
467 f->vector = (struct type **)
468 xrealloc (f->vector, f->length * sizeof (struct type *));
469 memset (&f->vector[f->length / 2],
470 '\0', f->length * sizeof (struct type *) / 2);
472 return &f->vector[index];
477 record_minimal_symbol (name, address, type, objfile)
481 struct objfile *objfile;
483 enum minimal_symbol_type ms_type;
485 asection *bfd_section;
491 section = SECT_OFF_TEXT (objfile);
492 bfd_section = DBX_TEXT_SECTION (objfile);
496 section = SECT_OFF_DATA (objfile);
497 bfd_section = DBX_DATA_SECTION (objfile);
501 section = SECT_OFF_BSS (objfile);
502 bfd_section = DBX_BSS_SECTION (objfile);
512 section = SECT_OFF_DATA (objfile);
513 bfd_section = DBX_DATA_SECTION (objfile);
516 /* I don't think this type actually exists; since a N_SETV is the result
517 of going over many .o files, it doesn't make sense to have one
519 ms_type = mst_file_data;
520 section = SECT_OFF_DATA (objfile);
521 bfd_section = DBX_DATA_SECTION (objfile);
528 ms_type = mst_file_text;
529 section = SECT_OFF_TEXT (objfile);
530 bfd_section = DBX_TEXT_SECTION (objfile);
533 ms_type = mst_file_data;
535 /* Check for __DYNAMIC, which is used by Sun shared libraries.
536 Record it as global even if it's local, not global, so
537 lookup_minimal_symbol can find it. We don't check symbol_leading_char
538 because for SunOS4 it always is '_'. */
539 if (name[8] == 'C' && STREQ ("__DYNAMIC", name))
542 /* Same with virtual function tables, both global and static. */
544 char *tempstring = name;
545 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
547 if (VTBL_PREFIX_P ((tempstring)))
550 section = SECT_OFF_DATA (objfile);
551 bfd_section = DBX_DATA_SECTION (objfile);
554 ms_type = mst_file_bss;
555 section = SECT_OFF_BSS (objfile);
556 bfd_section = DBX_BSS_SECTION (objfile);
559 ms_type = mst_unknown;
565 if ((ms_type == mst_file_text || ms_type == mst_text)
566 && address < lowest_text_address)
567 lowest_text_address = address;
569 prim_record_minimal_symbol_and_info
570 (name, address, ms_type, NULL, section, bfd_section, objfile);
573 /* Scan and build partial symbols for a symbol file.
574 We have been initialized by a call to dbx_symfile_init, which
575 put all the relevant info into a "struct dbx_symfile_info",
576 hung off the objfile structure.
578 MAINLINE is true if we are reading the main symbol
579 table (as opposed to a shared lib or dynamically loaded file). */
582 dbx_symfile_read (objfile, mainline)
583 struct objfile *objfile;
584 int mainline; /* FIXME comments above */
588 struct cleanup *back_to;
590 sym_bfd = objfile->obfd;
592 /* .o and .nlm files are relocatables with text, data and bss segs based at
593 0. This flag disables special (Solaris stabs-in-elf only) fixups for
594 symbols with a value of 0. */
596 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
598 /* This is true for Solaris (and all other systems which put stabs
599 in sections, hopefully, since it would be silly to do things
600 differently from Solaris), and false for SunOS4 and other a.out
602 block_address_function_relative =
603 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
604 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
605 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
606 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
607 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
608 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
610 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
612 perror_with_name (objfile->name);
614 /* If we are reinitializing, or if we have never loaded syms yet, init */
616 || objfile->global_psymbols.size == 0
617 || objfile->static_psymbols.size == 0)
618 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
620 symbol_size = DBX_SYMBOL_SIZE (objfile);
621 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
623 free_pending_blocks ();
624 back_to = make_cleanup (really_free_pendings, 0);
626 init_minimal_symbol_collection ();
627 make_cleanup_discard_minimal_symbols ();
629 /* Read stabs data from executable file and define symbols. */
631 read_dbx_symtab (objfile);
633 /* Add the dynamic symbols. */
635 read_dbx_dynamic_symtab (objfile);
637 /* Install any minimal symbols that have been collected as the current
638 minimal symbols for this objfile. */
640 install_minimal_symbols (objfile);
642 do_cleanups (back_to);
645 /* Initialize anything that needs initializing when a completely new
646 symbol file is specified (not just adding some symbols from another
647 file, e.g. a shared library). */
650 dbx_new_init (ignore)
651 struct objfile *ignore;
653 stabsread_new_init ();
654 buildsym_new_init ();
655 init_header_files ();
659 /* dbx_symfile_init ()
660 is the dbx-specific initialization routine for reading symbols.
661 It is passed a struct objfile which contains, among other things,
662 the BFD for the file whose symbols are being read, and a slot for a pointer
663 to "private data" which we fill with goodies.
665 We read the string table into malloc'd space and stash a pointer to it.
667 Since BFD doesn't know how to read debug symbols in a format-independent
668 way (and may never do so...), we have to do it ourselves. We will never
669 be called unless this is an a.out (or very similar) file.
670 FIXME, there should be a cleaner peephole into the BFD environment here. */
672 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
675 dbx_symfile_init (objfile)
676 struct objfile *objfile;
679 bfd *sym_bfd = objfile->obfd;
680 char *name = bfd_get_filename (sym_bfd);
682 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
684 /* Allocate struct to keep track of the symfile */
685 objfile->sym_stab_info = (struct dbx_symfile_info *)
686 xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
687 memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
689 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
690 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
691 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
693 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
694 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
695 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
697 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
699 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
701 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
703 error ("Can't find .text section in symbol file");
704 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
705 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
707 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
708 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
709 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
711 /* Read the string table and stash it away in the psymbol_obstack. It is
712 only needed as long as we need to expand psymbols into full symbols,
713 so when we blow away the psymbol the string table goes away as well.
714 Note that gdb used to use the results of attempting to malloc the
715 string table, based on the size it read, as a form of sanity check
716 for botched byte swapping, on the theory that a byte swapped string
717 table size would be so totally bogus that the malloc would fail. Now
718 that we put in on the psymbol_obstack, we can't do this since gdb gets
719 a fatal error (out of virtual memory) if the size is bogus. We can
720 however at least check to see if the size is less than the size of
721 the size field itself, or larger than the size of the entire file.
722 Note that all valid string tables have a size greater than zero, since
723 the bytes used to hold the size are included in the count. */
725 if (STRING_TABLE_OFFSET == 0)
727 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
728 will never be zero, even when there is no string table. This
729 would appear to be a bug in bfd. */
730 DBX_STRINGTAB_SIZE (objfile) = 0;
731 DBX_STRINGTAB (objfile) = NULL;
735 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
737 perror_with_name (name);
739 memset ((PTR) size_temp, 0, sizeof (size_temp));
740 val = bfd_read ((PTR) size_temp, sizeof (size_temp), 1, sym_bfd);
743 perror_with_name (name);
747 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
748 EOF if there is no string table, and attempting to read the size
749 from EOF will read zero bytes. */
750 DBX_STRINGTAB_SIZE (objfile) = 0;
751 DBX_STRINGTAB (objfile) = NULL;
755 /* Read some data that would appear to be the string table size.
756 If there really is a string table, then it is probably the right
757 size. Byteswap if necessary and validate the size. Note that
758 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
759 random data that happened to be at STRING_TABLE_OFFSET, because
760 bfd can't tell us there is no string table, the sanity checks may
761 or may not catch this. */
762 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
764 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
765 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
766 error ("ridiculous string table size (%d bytes).",
767 DBX_STRINGTAB_SIZE (objfile));
769 DBX_STRINGTAB (objfile) =
770 (char *) obstack_alloc (&objfile->psymbol_obstack,
771 DBX_STRINGTAB_SIZE (objfile));
772 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
774 /* Now read in the string table in one big gulp. */
776 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
778 perror_with_name (name);
779 val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1,
781 if (val != DBX_STRINGTAB_SIZE (objfile))
782 perror_with_name (name);
787 /* Perform any local cleanups required when we are done with a particular
788 objfile. I.E, we are in the process of discarding all symbol information
789 for an objfile, freeing up all memory held for it, and unlinking the
790 objfile struct from the global list of known objfiles. */
793 dbx_symfile_finish (objfile)
794 struct objfile *objfile;
796 if (objfile->sym_stab_info != NULL)
798 if (HEADER_FILES (objfile) != NULL)
800 register int i = N_HEADER_FILES (objfile);
801 register struct header_file *hfiles = HEADER_FILES (objfile);
805 free (hfiles[i].name);
806 free (hfiles[i].vector);
810 mfree (objfile->md, objfile->sym_stab_info);
812 free_header_files ();
816 /* Buffer for reading the symbol table entries. */
817 static struct external_nlist symbuf[4096];
818 static int symbuf_idx;
819 static int symbuf_end;
821 /* cont_elem is used for continuing information in cfront.
822 It saves information about which types need to be fixed up and
823 completed after all the stabs are read. */
826 /* sym and stabsstring for continuing information in cfront */
829 /* state dependancies (statics that must be preserved) */
833 int (*func) PARAMS ((struct objfile *, struct symbol *, char *));
834 /* other state dependancies include:
835 (assumption is that these will not change since process_now FIXME!!)
842 static struct cont_elem *cont_list = 0;
843 static int cont_limit = 0;
844 static int cont_count = 0;
846 /* Arrange for function F to be called with arguments SYM and P later
847 in the stabs reading process. */
849 process_later (sym, p, f)
852 int (*f) PARAMS ((struct objfile *, struct symbol *, char *));
855 /* Allocate more space for the deferred list. */
856 if (cont_count >= cont_limit - 1)
858 cont_limit += 32; /* chunk size */
861 = (struct cont_elem *) xrealloc (cont_list,
863 * sizeof (struct cont_elem)));
865 error ("Virtual memory exhausted\n");
868 /* Save state variables so we can process these stabs later. */
869 cont_list[cont_count].sym_idx = symbuf_idx;
870 cont_list[cont_count].sym_end = symbuf_end;
871 cont_list[cont_count].symnum = symnum;
872 cont_list[cont_count].sym = sym;
873 cont_list[cont_count].stabs = p;
874 cont_list[cont_count].func = f;
878 /* Call deferred funtions in CONT_LIST. */
881 process_now (objfile)
882 struct objfile *objfile;
891 int (*func) PARAMS ((struct objfile *, struct symbol *, char *));
893 /* Save the state of our caller, we'll want to restore it before
895 save_symbuf_idx = symbuf_idx;
896 save_symbuf_end = symbuf_end;
897 save_symnum = symnum;
899 /* Iterate over all the deferred stabs. */
900 for (i = 0; i < cont_count; i++)
902 /* Restore the state for this deferred stab. */
903 symbuf_idx = cont_list[i].sym_idx;
904 symbuf_end = cont_list[i].sym_end;
905 symnum = cont_list[i].symnum;
906 sym = cont_list[i].sym;
907 stabs = cont_list[i].stabs;
908 func = cont_list[i].func;
910 /* Call the function to handle this deferrd stab. */
911 err = (*func) (objfile, sym, stabs);
913 error ("Internal error: unable to resolve stab.\n");
916 /* Restore our caller's state. */
917 symbuf_idx = save_symbuf_idx;
918 symbuf_end = save_symbuf_end;
919 symnum = save_symnum;
924 /* Name of last function encountered. Used in Solaris to approximate
925 object file boundaries. */
926 static char *last_function_name;
928 /* The address in memory of the string table of the object file we are
929 reading (which might not be the "main" object file, but might be a
930 shared library or some other dynamically loaded thing). This is
931 set by read_dbx_symtab when building psymtabs, and by
932 read_ofile_symtab when building symtabs, and is used only by
933 next_symbol_text. FIXME: If that is true, we don't need it when
934 building psymtabs, right? */
935 static char *stringtab_global;
937 /* These variables are used to control fill_symbuf when the stabs
938 symbols are not contiguous (as may be the case when a COFF file is
939 linked using --split-by-reloc). */
940 static struct stab_section_list *symbuf_sections;
941 static unsigned int symbuf_left;
942 static unsigned int symbuf_read;
944 /* Refill the symbol table input buffer
945 and set the variables that control fetching entries from it.
946 Reports an error if no data available.
947 This function can read past the end of the symbol table
948 (into the string table) but this does no harm. */
951 fill_symbuf (sym_bfd)
957 if (symbuf_sections == NULL)
958 count = sizeof (symbuf);
961 if (symbuf_left <= 0)
963 file_ptr filepos = symbuf_sections->section->filepos;
964 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
965 perror_with_name (bfd_get_filename (sym_bfd));
966 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
967 symbol_table_offset = filepos - symbuf_read;
968 symbuf_sections = symbuf_sections->next;
972 if (count > sizeof (symbuf))
973 count = sizeof (symbuf);
976 nbytes = bfd_read ((PTR) symbuf, count, 1, sym_bfd);
978 perror_with_name (bfd_get_filename (sym_bfd));
979 else if (nbytes == 0)
980 error ("Premature end of file reading symbol table");
981 symbuf_end = nbytes / symbol_size;
983 symbuf_left -= nbytes;
984 symbuf_read += nbytes;
987 #define SWAP_SYMBOL(symp, abfd) \
989 (symp)->n_strx = bfd_h_get_32(abfd, \
990 (unsigned char *)&(symp)->n_strx); \
991 (symp)->n_desc = bfd_h_get_16 (abfd, \
992 (unsigned char *)&(symp)->n_desc); \
993 (symp)->n_value = bfd_h_get_32 (abfd, \
994 (unsigned char *)&(symp)->n_value); \
997 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
999 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
1000 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
1001 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
1002 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
1005 /* Invariant: The symbol pointed to by symbuf_idx is the first one
1006 that hasn't been swapped. Swap the symbol at the same time
1007 that symbuf_idx is incremented. */
1009 /* dbx allows the text of a symbol name to be continued into the
1010 next symbol name! When such a continuation is encountered
1011 (a \ at the end of the text of a name)
1012 call this function to get the continuation. */
1015 dbx_next_symbol_text (objfile)
1016 struct objfile *objfile;
1018 struct internal_nlist nlist;
1020 if (symbuf_idx == symbuf_end)
1021 fill_symbuf (symfile_bfd);
1024 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
1025 OBJSTAT (objfile, n_stabs++);
1029 return nlist.n_strx + stringtab_global + file_string_table_offset;
1032 /* Initialize the list of bincls to contain none and have some
1036 init_bincl_list (number, objfile)
1038 struct objfile *objfile;
1040 bincls_allocated = number;
1041 next_bincl = bincl_list = (struct header_file_location *)
1042 xmmalloc (objfile->md, bincls_allocated * sizeof (struct header_file_location));
1045 /* Add a bincl to the list. */
1048 add_bincl_to_list (pst, name, instance)
1049 struct partial_symtab *pst;
1053 if (next_bincl >= bincl_list + bincls_allocated)
1055 int offset = next_bincl - bincl_list;
1056 bincls_allocated *= 2;
1057 bincl_list = (struct header_file_location *)
1058 xmrealloc (pst->objfile->md, (char *) bincl_list,
1059 bincls_allocated * sizeof (struct header_file_location));
1060 next_bincl = bincl_list + offset;
1062 next_bincl->pst = pst;
1063 next_bincl->instance = instance;
1064 next_bincl++->name = name;
1067 /* Given a name, value pair, find the corresponding
1068 bincl in the list. Return the partial symtab associated
1069 with that header_file_location. */
1071 static struct partial_symtab *
1072 find_corresponding_bincl_psymtab (name, instance)
1076 struct header_file_location *bincl;
1078 for (bincl = bincl_list; bincl < next_bincl; bincl++)
1079 if (bincl->instance == instance
1080 && STREQ (name, bincl->name))
1083 complain (&repeated_header_complaint, name, symnum);
1084 return (struct partial_symtab *) 0;
1087 /* Free the storage allocated for the bincl list. */
1090 free_bincl_list (objfile)
1091 struct objfile *objfile;
1093 mfree (objfile->md, (PTR) bincl_list);
1094 bincls_allocated = 0;
1098 do_free_bincl_list_cleanup (void *objfile)
1100 free_bincl_list (objfile);
1103 static struct cleanup *
1104 make_cleanup_free_bincl_list (struct objfile *objfile)
1106 return make_cleanup (do_free_bincl_list_cleanup, objfile);
1109 /* Scan a SunOs dynamic symbol table for symbols of interest and
1110 add them to the minimal symbol table. */
1113 read_dbx_dynamic_symtab (objfile)
1114 struct objfile *objfile;
1116 bfd *abfd = objfile->obfd;
1117 struct cleanup *back_to;
1127 CORE_ADDR sym_value;
1130 /* Check that the symbol file has dynamic symbols that we know about.
1131 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1132 on a sun4 host (and vice versa) and bfd is not configured
1133 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1134 so we ignore the dynamic symbols in this case. */
1135 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1136 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1137 || bfd_get_arch (abfd) == bfd_arch_unknown)
1140 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1141 if (dynsym_size < 0)
1144 dynsyms = (asymbol **) xmalloc (dynsym_size);
1145 back_to = make_cleanup (free, dynsyms);
1147 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1148 if (dynsym_count < 0)
1150 do_cleanups (back_to);
1154 /* Enter dynamic symbols into the minimal symbol table
1155 if this is a stripped executable. */
1156 if (bfd_get_symcount (abfd) <= 0)
1159 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1161 asymbol *sym = *symptr;
1165 sec = bfd_get_section (sym);
1167 /* BFD symbols are section relative. */
1168 sym_value = sym->value + sec->vma;
1170 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1172 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1175 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1177 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1180 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1182 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile));
1188 if (sym->flags & BSF_GLOBAL)
1191 record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
1196 /* Symbols from shared libraries have a dynamic relocation entry
1197 that points to the associated slot in the procedure linkage table.
1198 We make a mininal symbol table entry with type mst_solib_trampoline
1199 at the address in the procedure linkage table. */
1200 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1201 if (dynrel_size < 0)
1203 do_cleanups (back_to);
1207 dynrels = (arelent **) xmalloc (dynrel_size);
1208 make_cleanup (free, dynrels);
1210 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1211 if (dynrel_count < 0)
1213 do_cleanups (back_to);
1217 for (counter = 0, relptr = dynrels;
1218 counter < dynrel_count;
1219 counter++, relptr++)
1221 arelent *rel = *relptr;
1223 rel->address + ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1225 switch (bfd_get_arch (abfd))
1227 case bfd_arch_sparc:
1228 if (rel->howto->type != RELOC_JMP_SLOT)
1232 /* `16' is the type BFD produces for a jump table relocation. */
1233 if (rel->howto->type != 16)
1236 /* Adjust address in the jump table to point to
1237 the start of the bsr instruction. */
1244 name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
1245 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1249 do_cleanups (back_to);
1252 /* Setup partial_symtab's describing each source file for which
1253 debugging information is available. */
1256 read_dbx_symtab (objfile)
1257 struct objfile *objfile;
1259 register struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
1260 struct internal_nlist nlist;
1261 CORE_ADDR text_addr;
1264 register char *namestring;
1266 int past_first_source_file = 0;
1267 CORE_ADDR last_o_file_start = 0;
1268 CORE_ADDR last_function_start = 0;
1269 struct cleanup *back_to;
1271 int textlow_not_set;
1273 /* Current partial symtab */
1274 struct partial_symtab *pst;
1276 /* List of current psymtab's include files */
1277 char **psymtab_include_list;
1278 int includes_allocated;
1281 /* Index within current psymtab dependency list */
1282 struct partial_symtab **dependency_list;
1283 int dependencies_used, dependencies_allocated;
1285 text_addr = DBX_TEXT_ADDR (objfile);
1286 text_size = DBX_TEXT_SIZE (objfile);
1288 /* FIXME. We probably want to change stringtab_global rather than add this
1289 while processing every symbol entry. FIXME. */
1290 file_string_table_offset = 0;
1291 next_file_string_table_offset = 0;
1293 stringtab_global = DBX_STRINGTAB (objfile);
1295 pst = (struct partial_symtab *) 0;
1297 includes_allocated = 30;
1299 psymtab_include_list = (char **) alloca (includes_allocated *
1302 dependencies_allocated = 30;
1303 dependencies_used = 0;
1305 (struct partial_symtab **) alloca (dependencies_allocated *
1306 sizeof (struct partial_symtab *));
1308 /* Init bincl list */
1309 init_bincl_list (20, objfile);
1310 back_to = make_cleanup_free_bincl_list (objfile);
1312 last_source_file = NULL;
1314 lowest_text_address = (CORE_ADDR) -1;
1316 symfile_bfd = objfile->obfd; /* For next_text_symbol */
1317 abfd = objfile->obfd;
1318 symbuf_end = symbuf_idx = 0;
1319 next_symbol_text_func = dbx_next_symbol_text;
1320 textlow_not_set = 1;
1321 has_line_numbers = 0;
1323 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1325 /* Get the symbol for this run and pull out some info */
1326 QUIT; /* allow this to be interruptable */
1327 if (symbuf_idx == symbuf_end)
1329 bufp = &symbuf[symbuf_idx++];
1332 * Special case to speed up readin.
1334 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1336 has_line_numbers = 1;
1340 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1341 OBJSTAT (objfile, n_stabs++);
1343 /* Ok. There is a lot of code duplicated in the rest of this
1344 switch statement (for efficiency reasons). Since I don't
1345 like duplicating code, I will do my penance here, and
1346 describe the code which is duplicated:
1348 *) The assignment to namestring.
1349 *) The call to strchr.
1350 *) The addition of a partial symbol the the two partial
1351 symbol lists. This last is a large section of code, so
1352 I've imbedded it in the following macro.
1355 /* Set namestring based on nlist. If the string table index is invalid,
1356 give a fake name, and print a single error message per symbol file read,
1357 rather than abort the symbol reading or flood the user with messages. */
1359 /*FIXME: Too many adds and indirections in here for the inner loop. */
1360 #define SET_NAMESTRING()\
1361 if (((unsigned)CUR_SYMBOL_STRX + file_string_table_offset) >= \
1362 DBX_STRINGTAB_SIZE (objfile)) { \
1363 complain (&string_table_offset_complaint, symnum); \
1364 namestring = "<bad string table offset>"; \
1366 namestring = CUR_SYMBOL_STRX + file_string_table_offset + \
1367 DBX_STRINGTAB (objfile)
1369 #define CUR_SYMBOL_TYPE nlist.n_type
1370 #define CUR_SYMBOL_VALUE nlist.n_value
1371 #define CUR_SYMBOL_STRX nlist.n_strx
1372 #define DBXREAD_ONLY
1373 #define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms)\
1374 start_psymtab(ofile, fname, low, symoff, global_syms, static_syms)
1375 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
1376 end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)
1378 #include "partial-stab.h"
1381 /* If there's stuff to be cleaned up, clean it up. */
1382 if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */
1383 /*FIXME, does this have a bug at start address 0? */
1384 && last_o_file_start
1385 && objfile->ei.entry_point < nlist.n_value
1386 && objfile->ei.entry_point >= last_o_file_start)
1388 objfile->ei.entry_file_lowpc = last_o_file_start;
1389 objfile->ei.entry_file_highpc = nlist.n_value;
1394 /* Don't set pst->texthigh lower than it already is. */
1395 CORE_ADDR text_end =
1396 (lowest_text_address == (CORE_ADDR) -1
1397 ? (text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)))
1398 : lowest_text_address)
1401 end_psymtab (pst, psymtab_include_list, includes_used,
1402 symnum * symbol_size,
1403 text_end > pst->texthigh ? text_end : pst->texthigh,
1404 dependency_list, dependencies_used, textlow_not_set);
1407 do_cleanups (back_to);
1410 /* Allocate and partially fill a partial symtab. It will be
1411 completely filled at the end of the symbol list.
1413 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1414 is the address relative to which its symbols are (incremental) or 0
1418 static struct partial_symtab *
1419 start_psymtab (objfile, filename, textlow, ldsymoff, global_syms, static_syms)
1420 struct objfile *objfile;
1424 struct partial_symbol **global_syms;
1425 struct partial_symbol **static_syms;
1427 struct partial_symtab *result =
1428 start_psymtab_common (objfile, objfile->section_offsets,
1429 filename, textlow, global_syms, static_syms);
1431 result->read_symtab_private = (char *)
1432 obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc));
1433 LDSYMOFF (result) = ldsymoff;
1434 result->read_symtab = dbx_psymtab_to_symtab;
1435 SYMBOL_SIZE (result) = symbol_size;
1436 SYMBOL_OFFSET (result) = symbol_table_offset;
1437 STRING_OFFSET (result) = string_table_offset;
1438 FILE_STRING_OFFSET (result) = file_string_table_offset;
1440 /* If we're handling an ELF file, drag some section-relocation info
1441 for this source file out of the ELF symbol table, to compensate for
1442 Sun brain death. This replaces the section_offsets in this psymtab,
1444 elfstab_offset_sections (objfile, result);
1446 /* Deduce the source language from the filename for this psymtab. */
1447 psymtab_language = deduce_language_from_filename (filename);
1452 /* Close off the current usage of PST.
1453 Returns PST or NULL if the partial symtab was empty and thrown away.
1455 FIXME: List variables and peculiarities of same. */
1457 struct partial_symtab *
1458 end_psymtab (pst, include_list, num_includes, capping_symbol_offset,
1459 capping_text, dependency_list, number_dependencies, textlow_not_set)
1460 struct partial_symtab *pst;
1461 char **include_list;
1463 int capping_symbol_offset;
1464 CORE_ADDR capping_text;
1465 struct partial_symtab **dependency_list;
1466 int number_dependencies;
1467 int textlow_not_set;
1470 struct objfile *objfile = pst->objfile;
1472 if (capping_symbol_offset != -1)
1473 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
1474 pst->texthigh = capping_text;
1476 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1477 /* Under Solaris, the N_SO symbols always have a value of 0,
1478 instead of the usual address of the .o file. Therefore,
1479 we have to do some tricks to fill in texthigh and textlow.
1480 The first trick is in partial-stab.h: if we see a static
1481 or global function, and the textlow for the current pst
1482 is not set (ie: textlow_not_set), then we use that function's
1483 address for the textlow of the pst. */
1485 /* Now, to fill in texthigh, we remember the last function seen
1486 in the .o file (also in partial-stab.h). Also, there's a hack in
1487 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
1488 to here via the misc_info field. Therefore, we can fill in
1489 a reliable texthigh by taking the address plus size of the
1490 last function in the file. */
1492 if (pst->texthigh == 0 && last_function_name)
1496 struct minimal_symbol *minsym;
1498 p = strchr (last_function_name, ':');
1500 p = last_function_name;
1501 n = p - last_function_name;
1503 strncpy (p, last_function_name, n);
1506 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
1509 /* Sun Fortran appends an underscore to the minimal symbol name,
1510 try again with an appended underscore if the minimal symbol
1514 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
1518 pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
1520 last_function_name = NULL;
1523 /* this test will be true if the last .o file is only data */
1524 if (textlow_not_set)
1525 pst->textlow = pst->texthigh;
1528 struct partial_symtab *p1;
1530 /* If we know our own starting text address, then walk through all other
1531 psymtabs for this objfile, and if any didn't know their ending text
1532 address, set it to our starting address. Take care to not set our
1533 own ending address to our starting address, nor to set addresses on
1534 `dependency' files that have both textlow and texthigh zero. */
1536 ALL_OBJFILE_PSYMTABS (objfile, p1)
1538 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
1540 p1->texthigh = pst->textlow;
1541 /* if this file has only data, then make textlow match texthigh */
1542 if (p1->textlow == 0)
1543 p1->textlow = p1->texthigh;
1548 /* End of kludge for patching Solaris textlow and texthigh. */
1549 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
1551 pst->n_global_syms =
1552 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
1553 pst->n_static_syms =
1554 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
1556 pst->number_of_dependencies = number_dependencies;
1557 if (number_dependencies)
1559 pst->dependencies = (struct partial_symtab **)
1560 obstack_alloc (&objfile->psymbol_obstack,
1561 number_dependencies * sizeof (struct partial_symtab *));
1562 memcpy (pst->dependencies, dependency_list,
1563 number_dependencies * sizeof (struct partial_symtab *));
1566 pst->dependencies = 0;
1568 for (i = 0; i < num_includes; i++)
1570 struct partial_symtab *subpst =
1571 allocate_psymtab (include_list[i], objfile);
1573 /* Copy the sesction_offsets array from the main psymtab. */
1574 subpst->section_offsets = pst->section_offsets;
1575 subpst->read_symtab_private =
1576 (char *) obstack_alloc (&objfile->psymbol_obstack,
1577 sizeof (struct symloc));
1581 subpst->texthigh = 0;
1583 /* We could save slight bits of space by only making one of these,
1584 shared by the entire set of include files. FIXME-someday. */
1585 subpst->dependencies = (struct partial_symtab **)
1586 obstack_alloc (&objfile->psymbol_obstack,
1587 sizeof (struct partial_symtab *));
1588 subpst->dependencies[0] = pst;
1589 subpst->number_of_dependencies = 1;
1591 subpst->globals_offset =
1592 subpst->n_global_syms =
1593 subpst->statics_offset =
1594 subpst->n_static_syms = 0;
1598 subpst->read_symtab = pst->read_symtab;
1601 sort_pst_symbols (pst);
1603 /* If there is already a psymtab or symtab for a file of this name, remove it.
1604 (If there is a symtab, more drastic things also happen.)
1605 This happens in VxWorks. */
1606 free_named_symtabs (pst->filename);
1608 if (num_includes == 0
1609 && number_dependencies == 0
1610 && pst->n_global_syms == 0
1611 && pst->n_static_syms == 0
1612 && has_line_numbers == 0)
1614 /* Throw away this psymtab, it's empty. We can't deallocate it, since
1615 it is on the obstack, but we can forget to chain it on the list. */
1616 /* Empty psymtabs happen as a result of header files which don't have
1617 any symbols in them. There can be a lot of them. But this check
1618 is wrong, in that a psymtab with N_SLINE entries but nothing else
1619 is not empty, but we don't realize that. Fixing that without slowing
1620 things down might be tricky. */
1622 discard_psymtab (pst);
1624 /* Indicate that psymtab was thrown away. */
1625 pst = (struct partial_symtab *) NULL;
1631 dbx_psymtab_to_symtab_1 (pst)
1632 struct partial_symtab *pst;
1634 struct cleanup *old_chain;
1642 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1647 /* Read in all partial symtabs on which this one is dependent */
1648 for (i = 0; i < pst->number_of_dependencies; i++)
1649 if (!pst->dependencies[i]->readin)
1651 /* Inform about additional files that need to be read in. */
1654 fputs_filtered (" ", gdb_stdout);
1656 fputs_filtered ("and ", gdb_stdout);
1658 printf_filtered ("%s...", pst->dependencies[i]->filename);
1659 wrap_here (""); /* Flush output */
1660 gdb_flush (gdb_stdout);
1662 dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
1665 if (LDSYMLEN (pst)) /* Otherwise it's a dummy */
1667 /* Init stuff necessary for reading in symbols */
1670 old_chain = make_cleanup (really_free_pendings, 0);
1671 file_string_table_offset = FILE_STRING_OFFSET (pst);
1672 symbol_size = SYMBOL_SIZE (pst);
1674 /* Read in this file's symbols */
1675 bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
1676 read_ofile_symtab (pst);
1677 sort_symtab_syms (pst->symtab);
1679 do_cleanups (old_chain);
1685 /* Read in all of the symbols for a given psymtab for real.
1686 Be verbose about it if the user wants that. */
1689 dbx_psymtab_to_symtab (pst)
1690 struct partial_symtab *pst;
1699 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
1704 if (LDSYMLEN (pst) || pst->number_of_dependencies)
1706 /* Print the message now, before reading the string table,
1707 to avoid disconcerting pauses. */
1710 printf_filtered ("Reading in symbols for %s...", pst->filename);
1711 gdb_flush (gdb_stdout);
1714 sym_bfd = pst->objfile->obfd;
1716 next_symbol_text_func = dbx_next_symbol_text;
1718 dbx_psymtab_to_symtab_1 (pst);
1720 /* Match with global symbols. This only needs to be done once,
1721 after all of the symtabs and dependencies have been read in. */
1722 scan_file_globals (pst->objfile);
1724 /* Finish up the debug error message. */
1726 printf_filtered ("done.\n");
1730 /* Read in a defined section of a specific object file's symbols. */
1733 read_ofile_symtab (pst)
1734 struct partial_symtab *pst;
1736 register char *namestring;
1737 register struct external_nlist *bufp;
1738 struct internal_nlist nlist;
1740 unsigned max_symnum;
1742 struct objfile *objfile;
1743 int sym_offset; /* Offset to start of symbols to read */
1744 int sym_size; /* Size of symbols to read */
1745 CORE_ADDR text_offset; /* Start of text segment for symbols */
1746 int text_size; /* Size of text segment for symbols */
1747 struct section_offsets *section_offsets;
1749 objfile = pst->objfile;
1750 sym_offset = LDSYMOFF (pst);
1751 sym_size = LDSYMLEN (pst);
1752 text_offset = pst->textlow;
1753 text_size = pst->texthigh - pst->textlow;
1754 /* This cannot be simply objfile->section_offsets because of
1755 elfstab_offset_sections() which initializes the psymtab section
1756 offsets information in a special way, and that is different from
1757 objfile->section_offsets. */
1758 section_offsets = pst->section_offsets;
1760 current_objfile = objfile;
1761 subfile_stack = NULL;
1763 stringtab_global = DBX_STRINGTAB (objfile);
1764 last_source_file = NULL;
1766 abfd = objfile->obfd;
1767 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
1768 symbuf_end = symbuf_idx = 0;
1770 /* It is necessary to actually read one symbol *before* the start
1771 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
1772 occurs before the N_SO symbol.
1774 Detecting this in read_dbx_symtab
1775 would slow down initial readin, so we look for it here instead. */
1776 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
1778 bfd_seek (symfile_bfd, sym_offset - symbol_size, SEEK_CUR);
1780 bufp = &symbuf[symbuf_idx++];
1781 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1782 OBJSTAT (objfile, n_stabs++);
1786 processing_gcc_compilation = 0;
1787 if (nlist.n_type == N_TEXT)
1789 const char *tempstring = namestring;
1791 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1792 processing_gcc_compilation = 1;
1793 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1794 processing_gcc_compilation = 2;
1795 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
1797 if (STREQN (tempstring, "__gnu_compiled", 14))
1798 processing_gcc_compilation = 2;
1801 /* Try to select a C++ demangling based on the compilation unit
1804 if (processing_gcc_compilation)
1806 if (AUTO_DEMANGLING)
1808 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1814 /* The N_SO starting this symtab is the first symbol, so we
1815 better not check the symbol before it. I'm not this can
1816 happen, but it doesn't hurt to check for it. */
1817 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
1818 processing_gcc_compilation = 0;
1821 if (symbuf_idx == symbuf_end)
1823 bufp = &symbuf[symbuf_idx];
1824 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
1825 error ("First symbol in segment of executable not a source symbol");
1827 max_symnum = sym_size / symbol_size;
1830 symnum < max_symnum;
1833 QUIT; /* Allow this to be interruptable */
1834 if (symbuf_idx == symbuf_end)
1836 bufp = &symbuf[symbuf_idx++];
1837 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1838 OBJSTAT (objfile, n_stabs++);
1840 type = bfd_h_get_8 (abfd, bufp->e_type);
1846 process_one_symbol (type, nlist.n_desc, nlist.n_value,
1847 namestring, section_offsets, objfile);
1849 /* We skip checking for a new .o or -l file; that should never
1850 happen in this routine. */
1851 else if (type == N_TEXT)
1853 /* I don't think this code will ever be executed, because
1854 the GCC_COMPILED_FLAG_SYMBOL usually is right before
1855 the N_SO symbol which starts this source file.
1856 However, there is no reason not to accept
1857 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
1859 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
1860 processing_gcc_compilation = 1;
1861 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
1862 processing_gcc_compilation = 2;
1864 if (AUTO_DEMANGLING)
1866 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
1869 else if (type & N_EXT || type == (unsigned char) N_TEXT
1870 || type == (unsigned char) N_NBTEXT
1873 /* Global symbol: see if we came across a dbx defintion for
1874 a corresponding symbol. If so, store the value. Remove
1875 syms from the chain when their values are stored, but
1876 search the whole chain, as there may be several syms from
1877 different files with the same name. */
1878 /* This is probably not true. Since the files will be read
1879 in one at a time, each reference to a global symbol will
1880 be satisfied in each file as it appears. So we skip this
1886 current_objfile = NULL;
1888 /* In a Solaris elf file, this variable, which comes from the
1889 value of the N_SO symbol, will still be 0. Luckily, text_offset,
1890 which comes from pst->textlow is correct. */
1891 if (last_source_start_addr == 0)
1892 last_source_start_addr = text_offset;
1894 /* In reordered executables last_source_start_addr may not be the
1895 lower bound for this symtab, instead use text_offset which comes
1896 from pst->textlow which is correct. */
1897 if (last_source_start_addr > text_offset)
1898 last_source_start_addr = text_offset;
1900 pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT (objfile));
1902 /* Process items which we had to "process_later" due to dependancies
1904 process_now (objfile);
1910 /* This handles a single symbol from the symbol-file, building symbols
1911 into a GDB symtab. It takes these arguments and an implicit argument.
1913 TYPE is the type field of the ".stab" symbol entry.
1914 DESC is the desc field of the ".stab" entry.
1915 VALU is the value field of the ".stab" entry.
1916 NAME is the symbol name, in our address space.
1917 SECTION_OFFSETS is a set of amounts by which the sections of this object
1918 file were relocated when it was loaded into memory.
1919 Note that these section_offsets are not the
1920 objfile->section_offsets but the pst->section_offsets.
1921 All symbols that refer
1922 to memory locations need to be offset by these amounts.
1923 OBJFILE is the object file from which we are reading symbols.
1924 It is used in end_symtab. */
1927 process_one_symbol (type, desc, valu, name, section_offsets, objfile)
1931 struct section_offsets *section_offsets;
1932 struct objfile *objfile;
1934 #ifdef SUN_FIXED_LBRAC_BUG
1935 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
1936 to correct the address of N_LBRAC's. If it is not defined, then
1937 we never need to correct the addresses. */
1939 /* This records the last pc address we've seen. We depend on there being
1940 an SLINE or FUN or SO before the first LBRAC, since the variable does
1941 not get reset in between reads of different symbol files. */
1942 static CORE_ADDR last_pc_address;
1945 register struct context_stack *new;
1946 /* This remembers the address of the start of a function. It is used
1947 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
1948 relative to the current function's start address. On systems
1949 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
1950 used to relocate these symbol types rather than SECTION_OFFSETS. */
1951 static CORE_ADDR function_start_offset;
1953 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
1954 file. Used to detect the SunPRO solaris compiler. */
1955 static int n_opt_found;
1957 /* The stab type used for the definition of the last function.
1958 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
1959 static int function_stab_type = 0;
1961 if (!block_address_function_relative)
1962 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
1963 function start address, so just use the text offset. */
1964 function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
1966 /* Something is wrong if we see real data before
1967 seeing a source file name. */
1969 if (last_source_file == NULL && type != (unsigned char) N_SO)
1971 /* Ignore any symbols which appear before an N_SO symbol.
1972 Currently no one puts symbols there, but we should deal
1973 gracefully with the case. A complain()t might be in order,
1974 but this should not be an error (). */
1983 if (*name == '\000')
1985 /* This N_FUN marks the end of a function. This closes off the
1987 within_function = 0;
1988 new = pop_context ();
1990 /* Make a block for the local symbols within. */
1991 finish_block (new->name, &local_symbols, new->old_blocks,
1992 new->start_addr, new->start_addr + valu,
1995 /* May be switching to an assembler file which may not be using
1996 block relative stabs, so reset the offset. */
1997 if (block_address_function_relative)
1998 function_start_offset = 0;
2003 /* Relocate for dynamic loading */
2004 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2005 #ifdef SMASH_TEXT_ADDRESS
2006 SMASH_TEXT_ADDRESS (valu);
2008 goto define_a_symbol;
2011 /* This "symbol" just indicates the start of an inner lexical
2012 context within a function. */
2014 /* Ignore extra outermost context from SunPRO cc and acc. */
2015 if (n_opt_found && desc == 1)
2018 if (block_address_function_relative)
2019 /* Relocate for Sun ELF acc fn-relative syms. */
2020 valu += function_start_offset;
2022 /* On most machines, the block addresses are relative to the
2023 N_SO, the linker did not relocate them (sigh). */
2024 valu += last_source_start_addr;
2026 #ifdef SUN_FIXED_LBRAC_BUG
2027 if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address)
2029 /* Patch current LBRAC pc value to match last handy pc value */
2030 complain (&lbrac_complaint);
2031 valu = last_pc_address;
2034 new = push_context (desc, valu);
2038 /* This "symbol" just indicates the end of an inner lexical
2039 context that was started with N_LBRAC. */
2041 /* Ignore extra outermost context from SunPRO cc and acc. */
2042 if (n_opt_found && desc == 1)
2045 if (block_address_function_relative)
2046 /* Relocate for Sun ELF acc fn-relative syms. */
2047 valu += function_start_offset;
2049 /* On most machines, the block addresses are relative to the
2050 N_SO, the linker did not relocate them (sigh). */
2051 valu += last_source_start_addr;
2053 new = pop_context ();
2054 if (desc != new->depth)
2055 complain (&lbrac_mismatch_complaint, symnum);
2057 /* Some compilers put the variable decls inside of an
2058 LBRAC/RBRAC block. This macro should be nonzero if this
2059 is true. DESC is N_DESC from the N_RBRAC symbol.
2060 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2061 or the GCC2_COMPILED_SYMBOL. */
2062 #if !defined (VARIABLES_INSIDE_BLOCK)
2063 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2066 /* Can only use new->locals as local symbols here if we're in
2067 gcc or on a machine that puts them before the lbrack. */
2068 if (!VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2069 local_symbols = new->locals;
2071 if (context_stack_depth
2072 > !VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2074 /* This is not the outermost LBRAC...RBRAC pair in the function,
2075 its local symbols preceded it, and are the ones just recovered
2076 from the context stack. Define the block for them (but don't
2077 bother if the block contains no symbols. Should we complain
2078 on blocks without symbols? I can't think of any useful purpose
2080 if (local_symbols != NULL)
2082 /* Muzzle a compiler bug that makes end < start. (which
2083 compilers? Is this ever harmful?). */
2084 if (new->start_addr > valu)
2086 complain (&lbrac_rbrac_complaint);
2087 new->start_addr = valu;
2089 /* Make a block for the local symbols within. */
2090 finish_block (0, &local_symbols, new->old_blocks,
2091 new->start_addr, valu, objfile);
2096 /* This is the outermost LBRAC...RBRAC pair. There is no
2097 need to do anything; leave the symbols that preceded it
2098 to be attached to the function's own block. We need to
2099 indicate that we just moved outside of the function. */
2100 within_function = 0;
2103 if (VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2104 /* Now pop locals of block just finished. */
2105 local_symbols = new->locals;
2110 /* This kind of symbol indicates the start of an object file. */
2111 /* Relocate for dynamic loading */
2112 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2116 /* This type of symbol indicates the start of data
2117 for one source file.
2118 Finish the symbol table of the previous source file
2119 (if any) and start accumulating a new symbol table. */
2120 /* Relocate for dynamic loading */
2121 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2125 #ifdef SUN_FIXED_LBRAC_BUG
2126 last_pc_address = valu; /* Save for SunOS bug circumcision */
2129 #ifdef PCC_SOL_BROKEN
2130 /* pcc bug, occasionally puts out SO for SOL. */
2131 if (context_stack_depth > 0)
2133 start_subfile (name, NULL);
2137 if (last_source_file)
2139 /* Check if previous symbol was also an N_SO (with some
2140 sanity checks). If so, that one was actually the directory
2141 name, and the current one is the real file name.
2143 if (previous_stab_code == (unsigned char) N_SO)
2145 patch_subfile_names (current_subfile, name);
2146 break; /* Ignore repeated SOs */
2148 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
2152 /* Null name means this just marks the end of text for this .o file.
2153 Don't start a new symtab in this case. */
2154 if (*name == '\000')
2157 if (block_address_function_relative)
2158 function_start_offset = 0;
2161 start_symtab (name, NULL, valu);
2162 record_debugformat ("stabs");
2166 /* This type of symbol indicates the start of data for
2167 a sub-source-file, one whose contents were copied or
2168 included in the compilation of the main source file
2169 (whose name was given in the N_SO symbol.) */
2170 /* Relocate for dynamic loading */
2171 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2172 start_subfile (name, current_subfile->dirname);
2177 add_new_header_file (name, valu);
2178 start_subfile (name, current_subfile->dirname);
2182 start_subfile (pop_subfile (), current_subfile->dirname);
2186 add_old_header_file (name, valu);
2190 /* This type of "symbol" really just records
2191 one line-number -- core-address correspondence.
2192 Enter it in the line list for this symbol table. */
2194 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
2195 valu += function_start_offset;
2197 #ifdef SUN_FIXED_LBRAC_BUG
2198 last_pc_address = valu; /* Save for SunOS bug circumcision */
2200 record_line (current_subfile, desc, valu);
2204 common_block_start (name, objfile);
2208 common_block_end (objfile);
2211 /* The following symbol types need to have the appropriate offset added
2212 to their value; then we process symbol definitions in the name. */
2214 case N_STSYM: /* Static symbol in data seg */
2215 case N_LCSYM: /* Static symbol in BSS seg */
2216 case N_ROSYM: /* Static symbol in Read-only data seg */
2217 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
2218 Solaris2's stabs-in-elf makes *most* symbols relative
2219 but leaves a few absolute (at least for Solaris 2.1 and version
2220 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
2221 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
2222 .stab "foo:V...",N_STSYM is relative (section base subtracted).
2223 This leaves us no choice but to search for the 'S' or 'V'...
2224 (or pass the whole section_offsets stuff down ONE MORE function
2225 call level, which we really don't want to do). */
2229 /* .o files and NLMs have non-zero text seg offsets, but don't need
2230 their static syms offset in this fashion. XXX - This is really a
2231 crock that should be fixed in the solib handling code so that I
2232 don't have to work around it here. */
2234 if (!symfile_relocatable)
2236 p = strchr (name, ':');
2237 if (p != 0 && p[1] == 'S')
2239 /* The linker relocated it. We don't want to add an
2240 elfstab_offset_sections-type offset, but we *do* want
2241 to add whatever solib.c passed to symbol_file_add as
2242 addr (this is known to affect SunOS4, and I suspect ELF
2243 too). Since elfstab_offset_sections currently does not
2244 muck with the text offset (there is no Ttext.text
2245 symbol), we can get addr from the text offset. If
2246 elfstab_offset_sections ever starts dealing with the
2247 text offset, and we still need to do this, we need to
2248 invent a SECT_OFF_ADDR_KLUDGE or something. */
2249 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2250 goto define_a_symbol;
2253 /* Since it's not the kludge case, re-dispatch to the right handler. */
2267 case_N_STSYM: /* Static symbol in data seg */
2268 case N_DSLINE: /* Source line number, data seg */
2269 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
2270 goto define_a_symbol;
2272 case_N_LCSYM: /* Static symbol in BSS seg */
2273 case N_BSLINE: /* Source line number, bss seg */
2274 /* N_BROWS: overlaps with N_BSLINE */
2275 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
2276 goto define_a_symbol;
2278 case_N_ROSYM: /* Static symbol in Read-only data seg */
2279 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
2280 goto define_a_symbol;
2282 case N_ENTRY: /* Alternate entry point */
2283 /* Relocate for dynamic loading */
2284 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2285 goto define_a_symbol;
2287 /* The following symbol types we don't know how to process. Handle
2288 them in a "default" way, but complain to people who care. */
2290 case N_CATCH: /* Exception handler catcher */
2291 case N_EHDECL: /* Exception handler name */
2292 case N_PC: /* Global symbol in Pascal */
2293 case N_M2C: /* Modula-2 compilation unit */
2294 /* N_MOD2: overlaps with N_EHDECL */
2295 case N_SCOPE: /* Modula-2 scope information */
2296 case N_ECOML: /* End common (local name) */
2297 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
2302 complain (&unknown_symtype_complaint, local_hex_string (type));
2305 /* The following symbol types don't need the address field relocated,
2306 since it is either unused, or is absolute. */
2308 case N_GSYM: /* Global variable */
2309 case N_NSYMS: /* Number of symbols (ultrix) */
2310 case N_NOMAP: /* No map? (ultrix) */
2311 case N_RSYM: /* Register variable */
2312 case N_DEFD: /* Modula-2 GNU module dependency */
2313 case N_SSYM: /* Struct or union element */
2314 case N_LSYM: /* Local symbol in stack */
2315 case N_PSYM: /* Parameter variable */
2316 case N_LENG: /* Length of preceding symbol type */
2320 char *colon_pos = strchr (name, ':');
2321 if (colon_pos == NULL)
2324 deftype = colon_pos[1];
2330 function_stab_type = type;
2332 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2333 /* Deal with the SunPRO 3.0 compiler which omits the address
2334 from N_FUN symbols. */
2336 && valu == ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)))
2338 find_stab_function_addr (name, last_source_file, objfile);
2341 #ifdef SUN_FIXED_LBRAC_BUG
2342 /* The Sun acc compiler, under SunOS4, puts out
2343 functions with N_GSYM or N_STSYM. The problem is
2344 that the address of the symbol is no good (for N_GSYM
2345 it doesn't even attept an address; for N_STSYM it
2346 puts out an address but then it gets relocated
2347 relative to the data segment, not the text segment).
2348 Currently we can't fix this up later as we do for
2349 some types of symbol in scan_file_globals.
2350 Fortunately we do have a way of finding the address -
2351 we know that the value in last_pc_address is either
2352 the one we want (if we're dealing with the first
2353 function in an object file), or somewhere in the
2354 previous function. This means that we can use the
2355 minimal symbol table to get the address. */
2357 /* Starting with release 3.0, the Sun acc compiler,
2358 under SunOS4, puts out functions with N_FUN and a value
2359 of zero. This gets relocated to the start of the text
2360 segment of the module, which is no good either.
2361 Under SunOS4 we can deal with this as N_SLINE and N_SO
2362 entries contain valid absolute addresses.
2363 Release 3.0 acc also puts out N_OPT entries, which makes
2364 it possible to discern acc from cc or gcc. */
2366 if (type == N_GSYM || type == N_STSYM
2368 && n_opt_found && !block_address_function_relative))
2370 struct minimal_symbol *m;
2371 int l = colon_pos - name;
2373 m = lookup_minimal_symbol_by_pc (last_pc_address);
2374 if (m && STREQN (SYMBOL_NAME (m), name, l)
2375 && SYMBOL_NAME (m)[l] == '\0')
2376 /* last_pc_address was in this function */
2377 valu = SYMBOL_VALUE (m);
2378 else if (m && SYMBOL_NAME (m + 1)
2379 && STREQN (SYMBOL_NAME (m + 1), name, l)
2380 && SYMBOL_NAME (m + 1)[l] == '\0')
2381 /* last_pc_address was in last function */
2382 valu = SYMBOL_VALUE (m + 1);
2384 /* Not found - use last_pc_address (for finish_block) */
2385 valu = last_pc_address;
2388 last_pc_address = valu; /* Save for SunOS bug circumcision */
2391 if (block_address_function_relative)
2392 /* For Solaris 2.0 compilers, the block addresses and
2393 N_SLINE's are relative to the start of the
2394 function. On normal systems, and when using gcc on
2395 Solaris 2.0, these addresses are just absolute, or
2396 relative to the N_SO, depending on
2397 BLOCK_ADDRESS_ABSOLUTE. */
2398 function_start_offset = valu;
2400 within_function = 1;
2402 if (context_stack_depth > 1)
2404 complain (&lbrac_unmatched_complaint, symnum);
2408 if (context_stack_depth > 0)
2410 new = pop_context ();
2411 /* Make a block for the local symbols within. */
2412 finish_block (new->name, &local_symbols, new->old_blocks,
2413 new->start_addr, valu, objfile);
2416 new = push_context (0, valu);
2417 new->name = define_symbol (valu, name, desc, type, objfile);
2421 define_symbol (valu, name, desc, type, objfile);
2427 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
2428 for a bunch of other flags, too. Someday we may parse their
2429 flags; for now we ignore theirs and hope they'll ignore ours. */
2430 case N_OPT: /* Solaris 2: Compiler options */
2433 if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL))
2435 processing_gcc_compilation = 2;
2436 #if 1 /* Works, but is experimental. -fnf */
2437 if (AUTO_DEMANGLING)
2439 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2448 /* The following symbol types can be ignored. */
2449 case N_OBJ: /* Solaris 2: Object file dir and name */
2450 /* N_UNDF: Solaris 2: file separator mark */
2451 /* N_UNDF: -- we will never encounter it, since we only process one
2452 file's symbols at once. */
2453 case N_ENDM: /* Solaris 2: End of module */
2454 case N_MAIN: /* Name of main routine. */
2455 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2459 /* '#' is a GNU C extension to allow one symbol to refer to another
2462 Generally this is used so that an alias can refer to its main
2466 /* Initialize symbol reference names and determine if this is
2467 a definition. If symbol reference is being defined, go
2468 ahead and add it. Otherwise, just return sym. */
2473 /* If this stab defines a new reference ID that is not on the
2474 reference list, then put it on the reference list.
2476 We go ahead and advance NAME past the reference, even though
2477 it is not strictly necessary at this time. */
2478 refnum = symbol_reference_defined (&s);
2480 if (!ref_search (refnum))
2481 ref_add (refnum, 0, name, valu);
2486 previous_stab_code = type;
2489 /* FIXME: The only difference between this and elfstab_build_psymtabs
2490 is the call to install_minimal_symbols for elf, and the support for
2491 split sections. If the differences are really that small, the code
2492 should be shared. */
2494 /* Scan and build partial symbols for an coff symbol file.
2495 The coff file has already been processed to get its minimal symbols.
2497 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2500 OBJFILE is the object file we are reading symbols from.
2501 ADDR is the address relative to which the symbols are (e.g.
2502 the base address of the text segment).
2503 MAINLINE is true if we are reading the main symbol
2504 table (as opposed to a shared lib or dynamically loaded file).
2505 TEXTADDR is the address of the text section.
2506 TEXTSIZE is the size of the text section.
2507 STABSECTS is the list of .stab sections in OBJFILE.
2508 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2509 .stabstr section exists.
2511 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2512 adjusted for coff details. */
2515 coffstab_build_psymtabs (objfile, mainline,
2516 textaddr, textsize, stabsects,
2517 stabstroffset, stabstrsize)
2518 struct objfile *objfile;
2521 unsigned int textsize;
2522 struct stab_section_list *stabsects;
2523 file_ptr stabstroffset;
2524 unsigned int stabstrsize;
2527 bfd *sym_bfd = objfile->obfd;
2528 char *name = bfd_get_filename (sym_bfd);
2529 struct dbx_symfile_info *info;
2530 unsigned int stabsize;
2532 /* There is already a dbx_symfile_info allocated by our caller.
2533 It might even contain some info from the coff symtab to help us. */
2534 info = objfile->sym_stab_info;
2536 DBX_TEXT_ADDR (objfile) = textaddr;
2537 DBX_TEXT_SIZE (objfile) = textsize;
2539 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2540 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
2541 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
2543 if (stabstrsize > bfd_get_size (sym_bfd))
2544 error ("ridiculous string table size: %d bytes", stabstrsize);
2545 DBX_STRINGTAB (objfile) = (char *)
2546 obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
2547 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
2549 /* Now read in the string table in one big gulp. */
2551 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
2553 perror_with_name (name);
2554 val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd);
2555 if (val != stabstrsize)
2556 perror_with_name (name);
2558 stabsread_new_init ();
2559 buildsym_new_init ();
2560 free_header_files ();
2561 init_header_files ();
2563 processing_acc_compilation = 1;
2565 /* In a coff file, we've already installed the minimal symbols that came
2566 from the coff (non-stab) symbol table, so always act like an
2567 incremental load here. */
2568 if (stabsects->next == NULL)
2570 stabsize = bfd_section_size (sym_bfd, stabsects->section);
2571 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
2572 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
2576 struct stab_section_list *stabsect;
2578 DBX_SYMCOUNT (objfile) = 0;
2579 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
2581 stabsize = bfd_section_size (sym_bfd, stabsect->section);
2582 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
2585 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
2587 symbuf_sections = stabsects->next;
2588 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
2592 dbx_symfile_read (objfile, 0);
2595 /* Scan and build partial symbols for an ELF symbol file.
2596 This ELF file has already been processed to get its minimal symbols,
2597 and any DWARF symbols that were in it.
2599 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2602 OBJFILE is the object file we are reading symbols from.
2603 ADDR is the address relative to which the symbols are (e.g.
2604 the base address of the text segment).
2605 MAINLINE is true if we are reading the main symbol
2606 table (as opposed to a shared lib or dynamically loaded file).
2607 STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
2609 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
2610 .stabstr section exists.
2612 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
2613 adjusted for elf details. */
2616 elfstab_build_psymtabs (objfile, mainline,
2617 staboffset, stabsize,
2618 stabstroffset, stabstrsize)
2619 struct objfile *objfile;
2621 file_ptr staboffset;
2622 unsigned int stabsize;
2623 file_ptr stabstroffset;
2624 unsigned int stabstrsize;
2627 bfd *sym_bfd = objfile->obfd;
2628 char *name = bfd_get_filename (sym_bfd);
2629 struct dbx_symfile_info *info;
2631 /* There is already a dbx_symfile_info allocated by our caller.
2632 It might even contain some info from the ELF symtab to help us. */
2633 info = objfile->sym_stab_info;
2635 /* Find the first and last text address. dbx_symfile_read seems to
2637 find_text_range (sym_bfd, objfile);
2639 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
2640 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
2641 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
2642 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
2643 DBX_SYMTAB_OFFSET (objfile) = staboffset;
2645 if (stabstrsize > bfd_get_size (sym_bfd))
2646 error ("ridiculous string table size: %d bytes", stabstrsize);
2647 DBX_STRINGTAB (objfile) = (char *)
2648 obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
2649 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
2651 /* Now read in the string table in one big gulp. */
2653 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
2655 perror_with_name (name);
2656 val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd);
2657 if (val != stabstrsize)
2658 perror_with_name (name);
2660 stabsread_new_init ();
2661 buildsym_new_init ();
2662 free_header_files ();
2663 init_header_files ();
2664 install_minimal_symbols (objfile);
2666 processing_acc_compilation = 1;
2668 /* In an elf file, we've already installed the minimal symbols that came
2669 from the elf (non-stab) symbol table, so always act like an
2670 incremental load here. */
2671 dbx_symfile_read (objfile, 0);
2674 /* Scan and build partial symbols for a file with special sections for stabs
2675 and stabstrings. The file has already been processed to get its minimal
2676 symbols, and any other symbols that might be necessary to resolve GSYMs.
2678 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
2681 OBJFILE is the object file we are reading symbols from.
2682 ADDR is the address relative to which the symbols are (e.g. the base address
2683 of the text segment).
2684 MAINLINE is true if we are reading the main symbol table (as opposed to a
2685 shared lib or dynamically loaded file).
2686 STAB_NAME is the name of the section that contains the stabs.
2687 STABSTR_NAME is the name of the section that contains the stab strings.
2689 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
2692 stabsect_build_psymtabs (objfile, mainline, stab_name,
2693 stabstr_name, text_name)
2694 struct objfile *objfile;
2701 bfd *sym_bfd = objfile->obfd;
2702 char *name = bfd_get_filename (sym_bfd);
2704 asection *stabstrsect;
2705 asection *text_sect;
2707 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
2708 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
2714 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
2715 stab_name, stabstr_name);
2717 objfile->sym_stab_info = (struct dbx_symfile_info *)
2718 xmalloc (sizeof (struct dbx_symfile_info));
2719 memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
2721 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
2723 error ("Can't find %s section in symbol file", text_name);
2724 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
2725 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
2727 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
2728 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
2729 / DBX_SYMBOL_SIZE (objfile);
2730 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
2731 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
2733 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
2734 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile));
2735 DBX_STRINGTAB (objfile) = (char *)
2736 obstack_alloc (&objfile->psymbol_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
2737 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
2739 /* Now read in the string table in one big gulp. */
2741 val = bfd_get_section_contents (sym_bfd, /* bfd */
2742 stabstrsect, /* bfd section */
2743 DBX_STRINGTAB (objfile), /* input buffer */
2744 0, /* offset into section */
2745 DBX_STRINGTAB_SIZE (objfile)); /* amount to read */
2748 perror_with_name (name);
2750 stabsread_new_init ();
2751 buildsym_new_init ();
2752 free_header_files ();
2753 init_header_files ();
2754 install_minimal_symbols (objfile);
2756 /* Now, do an incremental load */
2758 processing_acc_compilation = 1;
2759 dbx_symfile_read (objfile, 0);
2762 static struct sym_fns aout_sym_fns =
2764 bfd_target_aout_flavour,
2765 dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */
2766 dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */
2767 dbx_symfile_read, /* sym_read: read a symbol file into symtab */
2768 dbx_symfile_finish, /* sym_finish: finished with file, cleanup */
2769 default_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
2770 NULL /* next: pointer to next struct sym_fns */
2774 _initialize_dbxread ()
2776 add_symtab_fns (&aout_sym_fns);