1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003.
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 /* This module provides three functions: dbx_symfile_init,
24 which initializes to read a symbol file; dbx_new_init, which
25 discards existing cached information when all symbols are being
26 discarded; and dbx_symfile_read, which reads a symbol table
29 dbx_symfile_read only does the minimum work necessary for letting the
30 user "name" things symbolically; it does not read the entire symtab.
31 Instead, it reads the external and static symbols and puts them in partial
32 symbol tables. When more extensive information is requested of a
33 file, the corresponding partial symbol table is mutated into a full
34 fledged symbol table by going back and reading the symbols
35 for real. dbx_psymtab_to_symtab() is the function that does this */
38 #include "gdb_string.h"
40 #if defined(USG) || defined(__CYGNUSCLIB__)
41 #include <sys/types.h>
45 #include "gdb_obstack.h"
48 #include "breakpoint.h"
50 #include "gdbcore.h" /* for bfd stuff */
51 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
55 #include "stabsread.h"
56 #include "gdb-stabs.h"
58 #include "language.h" /* Needed for local_hex_string */
59 #include "complaints.h"
61 #include "gdb_assert.h"
63 #include "aout/aout64.h"
64 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
67 /* This macro returns the size field of a minimal symbol, which is normally
68 stored in the "info" field. The macro can be overridden for specific
69 targets (e.g. MIPS16) that use the info field for other purposes. */
71 #define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
75 /* 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 /* The BFD for this file -- implicit parameter to next_symbol_text. */
120 static bfd *symfile_bfd;
122 /* The size of each symbol in the symbol file (in external form).
123 This is set by dbx_symfile_read when building psymtabs, and by
124 dbx_psymtab_to_symtab when building symtabs. */
126 static unsigned symbol_size;
128 /* This is the offset of the symbol table in the executable file. */
130 static unsigned symbol_table_offset;
132 /* This is the offset of the string table in the executable file. */
134 static unsigned string_table_offset;
136 /* For elf+stab executables, the n_strx field is not a simple index
137 into the string table. Instead, each .o file has a base offset in
138 the string table, and the associated symbols contain offsets from
139 this base. The following two variables contain the base offset for
140 the current and next .o files. */
142 static unsigned int file_string_table_offset;
143 static unsigned int next_file_string_table_offset;
145 /* .o and NLM files contain unrelocated addresses which are based at
146 0. When non-zero, this flag disables some of the special cases for
147 Solaris elf+stab text addresses at location 0. */
149 static int symfile_relocatable = 0;
151 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
152 relative to the function start address. */
154 static int block_address_function_relative = 0;
156 /* The lowest text address we have yet encountered. This is needed
157 because in an a.out file, there is no header field which tells us
158 what address the program is actually going to be loaded at, so we
159 need to make guesses based on the symbols (which *are* relocated to
160 reflect the address it will be loaded at). */
162 static CORE_ADDR lowest_text_address;
164 /* Non-zero if there is any line number info in the objfile. Prevents
165 end_psymtab from discarding an otherwise empty psymtab. */
167 static int has_line_numbers;
169 /* Complaints about the symbols we have encountered. */
172 unknown_symtype_complaint (const char *arg1)
174 complaint (&symfile_complaints, "unknown symbol type %s", arg1);
178 lbrac_mismatch_complaint (int arg1)
180 complaint (&symfile_complaints,
181 "N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", arg1);
185 repeated_header_complaint (const char *arg1, int arg2)
187 complaint (&symfile_complaints,
188 "\"repeated\" header file %s not previously seen, at symtab pos %d",
192 /* find_text_range --- find start and end of loadable code sections
194 The find_text_range function finds the shortest address range that
195 encloses all sections containing executable code, and stores it in
196 objfile's text_addr and text_size members.
198 dbx_symfile_read will use this to finish off the partial symbol
199 table, in some cases. */
202 find_text_range (bfd * sym_bfd, struct objfile *objfile)
209 for (sec = sym_bfd->sections; sec; sec = sec->next)
210 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
212 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
213 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
217 if (sec_start < start)
232 error ("Can't find any code sections in symbol file");
234 DBX_TEXT_ADDR (objfile) = start;
235 DBX_TEXT_SIZE (objfile) = end - start;
240 /* During initial symbol readin, we need to have a structure to keep
241 track of which psymtabs have which bincls in them. This structure
242 is used during readin to setup the list of dependencies within each
243 partial symbol table. */
245 struct header_file_location
247 char *name; /* Name of header file */
248 int instance; /* See above */
249 struct partial_symtab *pst; /* Partial symtab that has the
250 BINCL/EINCL defs for this file */
253 /* The actual list and controling variables */
254 static struct header_file_location *bincl_list, *next_bincl;
255 static int bincls_allocated;
257 /* Local function prototypes */
259 extern void _initialize_dbxread (void);
261 #if 0 /* OBSOLETE CFront */
262 // OBSOLETE static void process_now (struct objfile *);
263 #endif /* OBSOLETE CFront */
265 static void read_ofile_symtab (struct partial_symtab *);
267 static void dbx_psymtab_to_symtab (struct partial_symtab *);
269 static void dbx_psymtab_to_symtab_1 (struct partial_symtab *);
271 static void read_dbx_dynamic_symtab (struct objfile *objfile);
273 static void read_dbx_symtab (struct objfile *);
275 static void free_bincl_list (struct objfile *);
277 static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
279 static void add_bincl_to_list (struct partial_symtab *, char *, int);
281 static void init_bincl_list (int, struct objfile *);
283 static char *dbx_next_symbol_text (struct objfile *);
285 static void fill_symbuf (bfd *);
287 static void dbx_symfile_init (struct objfile *);
289 static void dbx_new_init (struct objfile *);
291 static void dbx_symfile_read (struct objfile *, int);
293 static void dbx_symfile_finish (struct objfile *);
295 static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);
297 static void add_new_header_file (char *, int);
299 static void add_old_header_file (char *, int);
301 static void add_this_object_header_file (int);
303 static struct partial_symtab *start_psymtab (struct objfile *, char *,
305 struct partial_symbol **,
306 struct partial_symbol **);
308 /* Free up old header file tables */
311 free_header_files (void)
313 if (this_object_header_files)
315 xfree (this_object_header_files);
316 this_object_header_files = NULL;
318 n_allocated_this_object_header_files = 0;
321 /* Allocate new header file tables */
324 init_header_files (void)
326 n_allocated_this_object_header_files = 10;
327 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
330 /* Add header file number I for this object file
331 at the next successive FILENUM. */
334 add_this_object_header_file (int i)
336 if (n_this_object_header_files == n_allocated_this_object_header_files)
338 n_allocated_this_object_header_files *= 2;
339 this_object_header_files
340 = (int *) xrealloc ((char *) this_object_header_files,
341 n_allocated_this_object_header_files * sizeof (int));
344 this_object_header_files[n_this_object_header_files++] = i;
347 /* Add to this file an "old" header file, one already seen in
348 a previous object file. NAME is the header file's name.
349 INSTANCE is its instance code, to select among multiple
350 symbol tables for the same header file. */
353 add_old_header_file (char *name, int instance)
355 register struct header_file *p = HEADER_FILES (current_objfile);
358 for (i = 0; i < N_HEADER_FILES (current_objfile); i++)
359 if (STREQ (p[i].name, name) && instance == p[i].instance)
361 add_this_object_header_file (i);
364 repeated_header_complaint (name, symnum);
367 /* Add to this file a "new" header file: definitions for its types follow.
368 NAME is the header file's name.
369 Most often this happens only once for each distinct header file,
370 but not necessarily. If it happens more than once, INSTANCE has
371 a different value each time, and references to the header file
372 use INSTANCE values to select among them.
374 dbx output contains "begin" and "end" markers for each new header file,
375 but at this level we just need to know which files there have been;
376 so we record the file when its "begin" is seen and ignore the "end". */
379 add_new_header_file (char *name, int instance)
382 register struct header_file *hfile;
384 /* Make sure there is room for one more header file. */
386 i = N_ALLOCATED_HEADER_FILES (current_objfile);
388 if (N_HEADER_FILES (current_objfile) == i)
392 N_ALLOCATED_HEADER_FILES (current_objfile) = 10;
393 HEADER_FILES (current_objfile) = (struct header_file *)
394 xmalloc (10 * sizeof (struct header_file));
399 N_ALLOCATED_HEADER_FILES (current_objfile) = i;
400 HEADER_FILES (current_objfile) = (struct header_file *)
401 xrealloc ((char *) HEADER_FILES (current_objfile),
402 (i * sizeof (struct header_file)));
406 /* Create an entry for this header file. */
408 i = N_HEADER_FILES (current_objfile)++;
409 hfile = HEADER_FILES (current_objfile) + i;
410 hfile->name = savestring (name, strlen (name));
411 hfile->instance = instance;
414 = (struct type **) xmalloc (10 * sizeof (struct type *));
415 memset (hfile->vector, 0, 10 * sizeof (struct type *));
417 add_this_object_header_file (i);
421 static struct type **
422 explicit_lookup_type (int real_filenum, int index)
424 register struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum];
426 if (index >= f->length)
429 f->vector = (struct type **)
430 xrealloc (f->vector, f->length * sizeof (struct type *));
431 memset (&f->vector[f->length / 2],
432 '\0', f->length * sizeof (struct type *) / 2);
434 return &f->vector[index];
439 record_minimal_symbol (char *name, CORE_ADDR address, int type,
440 struct objfile *objfile)
442 enum minimal_symbol_type ms_type;
444 asection *bfd_section;
450 section = SECT_OFF_TEXT (objfile);
451 bfd_section = DBX_TEXT_SECTION (objfile);
455 section = SECT_OFF_DATA (objfile);
456 bfd_section = DBX_DATA_SECTION (objfile);
460 section = SECT_OFF_BSS (objfile);
461 bfd_section = DBX_BSS_SECTION (objfile);
471 section = SECT_OFF_DATA (objfile);
472 bfd_section = DBX_DATA_SECTION (objfile);
475 /* I don't think this type actually exists; since a N_SETV is the result
476 of going over many .o files, it doesn't make sense to have one
478 ms_type = mst_file_data;
479 section = SECT_OFF_DATA (objfile);
480 bfd_section = DBX_DATA_SECTION (objfile);
487 ms_type = mst_file_text;
488 section = SECT_OFF_TEXT (objfile);
489 bfd_section = DBX_TEXT_SECTION (objfile);
492 ms_type = mst_file_data;
494 /* Check for __DYNAMIC, which is used by Sun shared libraries.
495 Record it as global even if it's local, not global, so
496 lookup_minimal_symbol can find it. We don't check symbol_leading_char
497 because for SunOS4 it always is '_'. */
498 if (name[8] == 'C' && STREQ ("__DYNAMIC", name))
501 /* Same with virtual function tables, both global and static. */
503 char *tempstring = name;
504 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
506 if (is_vtable_name (tempstring))
509 section = SECT_OFF_DATA (objfile);
510 bfd_section = DBX_DATA_SECTION (objfile);
513 ms_type = mst_file_bss;
514 section = SECT_OFF_BSS (objfile);
515 bfd_section = DBX_BSS_SECTION (objfile);
518 ms_type = mst_unknown;
524 if ((ms_type == mst_file_text || ms_type == mst_text)
525 && address < lowest_text_address)
526 lowest_text_address = address;
528 prim_record_minimal_symbol_and_info
529 (name, address, ms_type, NULL, section, bfd_section, objfile);
532 /* Scan and build partial symbols for a symbol file.
533 We have been initialized by a call to dbx_symfile_init, which
534 put all the relevant info into a "struct dbx_symfile_info",
535 hung off the objfile structure.
537 MAINLINE is true if we are reading the main symbol
538 table (as opposed to a shared lib or dynamically loaded file). */
541 dbx_symfile_read (struct objfile *objfile, int mainline)
545 struct cleanup *back_to;
547 sym_bfd = objfile->obfd;
549 /* .o and .nlm files are relocatables with text, data and bss segs based at
550 0. This flag disables special (Solaris stabs-in-elf only) fixups for
551 symbols with a value of 0. */
553 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
555 /* This is true for Solaris (and all other systems which put stabs
556 in sections, hopefully, since it would be silly to do things
557 differently from Solaris), and false for SunOS4 and other a.out
559 block_address_function_relative =
560 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
561 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
562 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
563 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
564 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
565 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
567 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
569 perror_with_name (objfile->name);
571 /* If we are reinitializing, or if we have never loaded syms yet, init */
573 || (objfile->global_psymbols.size == 0
574 && objfile->static_psymbols.size == 0))
575 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
577 symbol_size = DBX_SYMBOL_SIZE (objfile);
578 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
580 free_pending_blocks ();
581 back_to = make_cleanup (really_free_pendings, 0);
583 init_minimal_symbol_collection ();
584 make_cleanup_discard_minimal_symbols ();
586 /* Read stabs data from executable file and define symbols. */
588 read_dbx_symtab (objfile);
590 /* Add the dynamic symbols. */
592 read_dbx_dynamic_symtab (objfile);
594 /* Install any minimal symbols that have been collected as the current
595 minimal symbols for this objfile. */
597 install_minimal_symbols (objfile);
599 do_cleanups (back_to);
602 /* Initialize anything that needs initializing when a completely new
603 symbol file is specified (not just adding some symbols from another
604 file, e.g. a shared library). */
607 dbx_new_init (struct objfile *ignore)
609 stabsread_new_init ();
610 buildsym_new_init ();
611 init_header_files ();
615 /* dbx_symfile_init ()
616 is the dbx-specific initialization routine for reading symbols.
617 It is passed a struct objfile which contains, among other things,
618 the BFD for the file whose symbols are being read, and a slot for a pointer
619 to "private data" which we fill with goodies.
621 We read the string table into malloc'd space and stash a pointer to it.
623 Since BFD doesn't know how to read debug symbols in a format-independent
624 way (and may never do so...), we have to do it ourselves. We will never
625 be called unless this is an a.out (or very similar) file.
626 FIXME, there should be a cleaner peephole into the BFD environment here. */
628 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
631 dbx_symfile_init (struct objfile *objfile)
634 bfd *sym_bfd = objfile->obfd;
635 char *name = bfd_get_filename (sym_bfd);
637 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
639 /* Allocate struct to keep track of the symfile */
640 objfile->sym_stab_info = (struct dbx_symfile_info *)
641 xmmalloc (objfile->md, sizeof (struct dbx_symfile_info));
642 memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
644 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
645 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
646 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
648 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
649 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
650 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
652 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
654 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
656 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
658 error ("Can't find .text section in symbol file");
659 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
660 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
662 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
663 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
664 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
666 /* Read the string table and stash it away in the psymbol_obstack. It is
667 only needed as long as we need to expand psymbols into full symbols,
668 so when we blow away the psymbol the string table goes away as well.
669 Note that gdb used to use the results of attempting to malloc the
670 string table, based on the size it read, as a form of sanity check
671 for botched byte swapping, on the theory that a byte swapped string
672 table size would be so totally bogus that the malloc would fail. Now
673 that we put in on the psymbol_obstack, we can't do this since gdb gets
674 a fatal error (out of virtual memory) if the size is bogus. We can
675 however at least check to see if the size is less than the size of
676 the size field itself, or larger than the size of the entire file.
677 Note that all valid string tables have a size greater than zero, since
678 the bytes used to hold the size are included in the count. */
680 if (STRING_TABLE_OFFSET == 0)
682 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
683 will never be zero, even when there is no string table. This
684 would appear to be a bug in bfd. */
685 DBX_STRINGTAB_SIZE (objfile) = 0;
686 DBX_STRINGTAB (objfile) = NULL;
690 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
692 perror_with_name (name);
694 memset (size_temp, 0, sizeof (size_temp));
695 val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd);
698 perror_with_name (name);
702 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
703 EOF if there is no string table, and attempting to read the size
704 from EOF will read zero bytes. */
705 DBX_STRINGTAB_SIZE (objfile) = 0;
706 DBX_STRINGTAB (objfile) = NULL;
710 /* Read some data that would appear to be the string table size.
711 If there really is a string table, then it is probably the right
712 size. Byteswap if necessary and validate the size. Note that
713 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
714 random data that happened to be at STRING_TABLE_OFFSET, because
715 bfd can't tell us there is no string table, the sanity checks may
716 or may not catch this. */
717 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
719 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
720 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
721 error ("ridiculous string table size (%d bytes).",
722 DBX_STRINGTAB_SIZE (objfile));
724 DBX_STRINGTAB (objfile) =
725 (char *) obstack_alloc (&objfile->psymbol_obstack,
726 DBX_STRINGTAB_SIZE (objfile));
727 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
729 /* Now read in the string table in one big gulp. */
731 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
733 perror_with_name (name);
734 val = bfd_bread (DBX_STRINGTAB (objfile),
735 DBX_STRINGTAB_SIZE (objfile),
737 if (val != DBX_STRINGTAB_SIZE (objfile))
738 perror_with_name (name);
743 /* Perform any local cleanups required when we are done with a particular
744 objfile. I.E, we are in the process of discarding all symbol information
745 for an objfile, freeing up all memory held for it, and unlinking the
746 objfile struct from the global list of known objfiles. */
749 dbx_symfile_finish (struct objfile *objfile)
751 if (objfile->sym_stab_info != NULL)
753 if (HEADER_FILES (objfile) != NULL)
755 register int i = N_HEADER_FILES (objfile);
756 register struct header_file *hfiles = HEADER_FILES (objfile);
760 xfree (hfiles[i].name);
761 xfree (hfiles[i].vector);
765 xmfree (objfile->md, objfile->sym_stab_info);
767 free_header_files ();
771 /* Buffer for reading the symbol table entries. */
772 static struct external_nlist symbuf[4096];
773 static int symbuf_idx;
774 static int symbuf_end;
776 #if 0 /* OBSOLETE CFront */
777 // OBSOLETE /* cont_elem is used for continuing information in cfront.
778 // OBSOLETE It saves information about which types need to be fixed up and
779 // OBSOLETE completed after all the stabs are read. */
780 // OBSOLETE struct cont_elem
782 // OBSOLETE /* sym and stabstring for continuing information in cfront */
783 // OBSOLETE struct symbol *sym;
784 // OBSOLETE char *stabs;
785 // OBSOLETE /* state dependencies (statics that must be preserved) */
786 // OBSOLETE int sym_idx;
787 // OBSOLETE int sym_end;
788 // OBSOLETE int symnum;
789 // OBSOLETE int (*func) (struct objfile *, struct symbol *, char *);
790 // OBSOLETE /* other state dependencies include:
791 // OBSOLETE (assumption is that these will not change since process_now FIXME!!)
792 // OBSOLETE stringtab_global
795 // OBSOLETE symfile_bfd */
798 // OBSOLETE static struct cont_elem *cont_list = 0;
799 // OBSOLETE static int cont_limit = 0;
800 // OBSOLETE static int cont_count = 0;
802 // OBSOLETE /* Arrange for function F to be called with arguments SYM and P later
803 // OBSOLETE in the stabs reading process. */
805 // OBSOLETE process_later (struct symbol *sym, char *p,
806 // OBSOLETE int (*f) (struct objfile *, struct symbol *, char *))
809 // OBSOLETE /* Allocate more space for the deferred list. */
810 // OBSOLETE if (cont_count >= cont_limit - 1)
812 // OBSOLETE cont_limit += 32; /* chunk size */
814 // OBSOLETE cont_list
815 // OBSOLETE = (struct cont_elem *) xrealloc (cont_list,
816 // OBSOLETE (cont_limit
817 // OBSOLETE * sizeof (struct cont_elem)));
818 // OBSOLETE if (!cont_list)
819 // OBSOLETE error ("Virtual memory exhausted\n");
822 // OBSOLETE /* Save state variables so we can process these stabs later. */
823 // OBSOLETE cont_list[cont_count].sym_idx = symbuf_idx;
824 // OBSOLETE cont_list[cont_count].sym_end = symbuf_end;
825 // OBSOLETE cont_list[cont_count].symnum = symnum;
826 // OBSOLETE cont_list[cont_count].sym = sym;
827 // OBSOLETE cont_list[cont_count].stabs = p;
828 // OBSOLETE cont_list[cont_count].func = f;
829 // OBSOLETE cont_count++;
832 // OBSOLETE /* Call deferred funtions in CONT_LIST. */
834 // OBSOLETE static void
835 // OBSOLETE process_now (struct objfile *objfile)
838 // OBSOLETE int save_symbuf_idx;
839 // OBSOLETE int save_symbuf_end;
840 // OBSOLETE int save_symnum;
841 // OBSOLETE struct symbol *sym;
842 // OBSOLETE char *stabs;
844 // OBSOLETE int (*func) (struct objfile *, struct symbol *, char *);
846 // OBSOLETE /* Save the state of our caller, we'll want to restore it before
847 // OBSOLETE returning. */
848 // OBSOLETE save_symbuf_idx = symbuf_idx;
849 // OBSOLETE save_symbuf_end = symbuf_end;
850 // OBSOLETE save_symnum = symnum;
852 // OBSOLETE /* Iterate over all the deferred stabs. */
853 // OBSOLETE for (i = 0; i < cont_count; i++)
855 // OBSOLETE /* Restore the state for this deferred stab. */
856 // OBSOLETE symbuf_idx = cont_list[i].sym_idx;
857 // OBSOLETE symbuf_end = cont_list[i].sym_end;
858 // OBSOLETE symnum = cont_list[i].symnum;
859 // OBSOLETE sym = cont_list[i].sym;
860 // OBSOLETE stabs = cont_list[i].stabs;
861 // OBSOLETE func = cont_list[i].func;
863 // OBSOLETE /* Call the function to handle this deferrd stab. */
864 // OBSOLETE err = (*func) (objfile, sym, stabs);
866 // OBSOLETE error ("Internal error: unable to resolve stab.\n");
869 // OBSOLETE /* Restore our caller's state. */
870 // OBSOLETE symbuf_idx = save_symbuf_idx;
871 // OBSOLETE symbuf_end = save_symbuf_end;
872 // OBSOLETE symnum = save_symnum;
873 // OBSOLETE cont_count = 0;
875 #endif /* OBSOLETE CFront */
877 /* Name of last function encountered. Used in Solaris to approximate
878 object file boundaries. */
879 static char *last_function_name;
881 /* The address in memory of the string table of the object file we are
882 reading (which might not be the "main" object file, but might be a
883 shared library or some other dynamically loaded thing). This is
884 set by read_dbx_symtab when building psymtabs, and by
885 read_ofile_symtab when building symtabs, and is used only by
886 next_symbol_text. FIXME: If that is true, we don't need it when
887 building psymtabs, right? */
888 static char *stringtab_global;
890 /* These variables are used to control fill_symbuf when the stabs
891 symbols are not contiguous (as may be the case when a COFF file is
892 linked using --split-by-reloc). */
893 static struct stab_section_list *symbuf_sections;
894 static unsigned int symbuf_left;
895 static unsigned int symbuf_read;
897 /* This variable stores a global stabs buffer, if we read stabs into
898 memory in one chunk in order to process relocations. */
899 static bfd_byte *stabs_data;
901 /* Refill the symbol table input buffer
902 and set the variables that control fetching entries from it.
903 Reports an error if no data available.
904 This function can read past the end of the symbol table
905 (into the string table) but this does no harm. */
908 fill_symbuf (bfd *sym_bfd)
915 nbytes = sizeof (symbuf);
916 if (nbytes > symbuf_left)
917 nbytes = symbuf_left;
918 memcpy (symbuf, stabs_data + symbuf_read, nbytes);
920 else if (symbuf_sections == NULL)
922 count = sizeof (symbuf);
923 nbytes = bfd_bread (symbuf, count, sym_bfd);
927 if (symbuf_left <= 0)
929 file_ptr filepos = symbuf_sections->section->filepos;
930 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
931 perror_with_name (bfd_get_filename (sym_bfd));
932 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
933 symbol_table_offset = filepos - symbuf_read;
934 symbuf_sections = symbuf_sections->next;
938 if (count > sizeof (symbuf))
939 count = sizeof (symbuf);
940 nbytes = bfd_bread (symbuf, count, sym_bfd);
944 perror_with_name (bfd_get_filename (sym_bfd));
945 else if (nbytes == 0)
946 error ("Premature end of file reading symbol table");
947 symbuf_end = nbytes / symbol_size;
949 symbuf_left -= nbytes;
950 symbuf_read += nbytes;
954 stabs_seek (int sym_offset)
958 symbuf_read += sym_offset;
959 symbuf_left -= sym_offset;
962 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
965 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
967 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
968 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
969 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
970 if (bfd_get_sign_extend_vma (abfd)) \
971 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
973 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
976 /* Invariant: The symbol pointed to by symbuf_idx is the first one
977 that hasn't been swapped. Swap the symbol at the same time
978 that symbuf_idx is incremented. */
980 /* dbx allows the text of a symbol name to be continued into the
981 next symbol name! When such a continuation is encountered
982 (a \ at the end of the text of a name)
983 call this function to get the continuation. */
986 dbx_next_symbol_text (struct objfile *objfile)
988 struct internal_nlist nlist;
990 if (symbuf_idx == symbuf_end)
991 fill_symbuf (symfile_bfd);
994 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
995 OBJSTAT (objfile, n_stabs++);
999 return nlist.n_strx + stringtab_global + file_string_table_offset;
1002 /* Initialize the list of bincls to contain none and have some
1006 init_bincl_list (int number, struct objfile *objfile)
1008 bincls_allocated = number;
1009 next_bincl = bincl_list = (struct header_file_location *)
1010 xmmalloc (objfile->md, bincls_allocated * sizeof (struct header_file_location));
1013 /* Add a bincl to the list. */
1016 add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
1018 if (next_bincl >= bincl_list + bincls_allocated)
1020 int offset = next_bincl - bincl_list;
1021 bincls_allocated *= 2;
1022 bincl_list = (struct header_file_location *)
1023 xmrealloc (pst->objfile->md, (char *) bincl_list,
1024 bincls_allocated * sizeof (struct header_file_location));
1025 next_bincl = bincl_list + offset;
1027 next_bincl->pst = pst;
1028 next_bincl->instance = instance;
1029 next_bincl++->name = name;
1032 /* Given a name, value pair, find the corresponding
1033 bincl in the list. Return the partial symtab associated
1034 with that header_file_location. */
1036 static struct partial_symtab *
1037 find_corresponding_bincl_psymtab (char *name, int instance)
1039 struct header_file_location *bincl;
1041 for (bincl = bincl_list; bincl < next_bincl; bincl++)
1042 if (bincl->instance == instance
1043 && STREQ (name, bincl->name))
1046 repeated_header_complaint (name, symnum);
1047 return (struct partial_symtab *) 0;
1050 /* Free the storage allocated for the bincl list. */
1053 free_bincl_list (struct objfile *objfile)
1055 xmfree (objfile->md, bincl_list);
1056 bincls_allocated = 0;
1060 do_free_bincl_list_cleanup (void *objfile)
1062 free_bincl_list (objfile);
1065 static struct cleanup *
1066 make_cleanup_free_bincl_list (struct objfile *objfile)
1068 return make_cleanup (do_free_bincl_list_cleanup, objfile);
1071 /* Set namestring based on nlist. If the string table index is invalid,
1072 give a fake name, and print a single error message per symbol file read,
1073 rather than abort the symbol reading or flood the user with messages. */
1076 set_namestring (struct objfile *objfile, struct internal_nlist nlist)
1080 if (((unsigned) nlist.n_strx + file_string_table_offset) >=
1081 DBX_STRINGTAB_SIZE (objfile))
1083 complaint (&symfile_complaints, "bad string table offset in symbol %d",
1085 namestring = "<bad string table offset>";
1088 namestring = nlist.n_strx + file_string_table_offset +
1089 DBX_STRINGTAB (objfile);
1093 /* Scan a SunOs dynamic symbol table for symbols of interest and
1094 add them to the minimal symbol table. */
1097 read_dbx_dynamic_symtab (struct objfile *objfile)
1099 bfd *abfd = objfile->obfd;
1100 struct cleanup *back_to;
1110 CORE_ADDR sym_value;
1113 /* Check that the symbol file has dynamic symbols that we know about.
1114 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1115 on a sun4 host (and vice versa) and bfd is not configured
1116 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1117 so we ignore the dynamic symbols in this case. */
1118 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1119 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1120 || bfd_get_arch (abfd) == bfd_arch_unknown)
1123 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1124 if (dynsym_size < 0)
1127 dynsyms = (asymbol **) xmalloc (dynsym_size);
1128 back_to = make_cleanup (xfree, dynsyms);
1130 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1131 if (dynsym_count < 0)
1133 do_cleanups (back_to);
1137 /* Enter dynamic symbols into the minimal symbol table
1138 if this is a stripped executable. */
1139 if (bfd_get_symcount (abfd) <= 0)
1142 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1144 asymbol *sym = *symptr;
1148 sec = bfd_get_section (sym);
1150 /* BFD symbols are section relative. */
1151 sym_value = sym->value + sec->vma;
1153 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1155 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1158 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1160 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1163 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1165 sym_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile));
1171 if (sym->flags & BSF_GLOBAL)
1174 record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
1179 /* Symbols from shared libraries have a dynamic relocation entry
1180 that points to the associated slot in the procedure linkage table.
1181 We make a mininal symbol table entry with type mst_solib_trampoline
1182 at the address in the procedure linkage table. */
1183 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1184 if (dynrel_size < 0)
1186 do_cleanups (back_to);
1190 dynrels = (arelent **) xmalloc (dynrel_size);
1191 make_cleanup (xfree, dynrels);
1193 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1194 if (dynrel_count < 0)
1196 do_cleanups (back_to);
1200 for (counter = 0, relptr = dynrels;
1201 counter < dynrel_count;
1202 counter++, relptr++)
1204 arelent *rel = *relptr;
1206 rel->address + ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1208 switch (bfd_get_arch (abfd))
1210 case bfd_arch_sparc:
1211 if (rel->howto->type != RELOC_JMP_SLOT)
1215 /* `16' is the type BFD produces for a jump table relocation. */
1216 if (rel->howto->type != 16)
1219 /* Adjust address in the jump table to point to
1220 the start of the bsr instruction. */
1227 name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
1228 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1232 do_cleanups (back_to);
1235 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1237 find_stab_function_addr (char *namestring, char *filename,
1238 struct objfile *objfile)
1240 struct minimal_symbol *msym;
1244 p = strchr (namestring, ':');
1249 strncpy (p, namestring, n);
1252 msym = lookup_minimal_symbol (p, filename, objfile);
1255 /* Sun Fortran appends an underscore to the minimal symbol name,
1256 try again with an appended underscore if the minimal symbol
1260 msym = lookup_minimal_symbol (p, filename, objfile);
1263 if (msym == NULL && filename != NULL)
1265 /* Try again without the filename. */
1267 msym = lookup_minimal_symbol (p, NULL, objfile);
1269 if (msym == NULL && filename != NULL)
1271 /* And try again for Sun Fortran, but without the filename. */
1274 msym = lookup_minimal_symbol (p, NULL, objfile);
1277 return msym == NULL ? 0 : SYMBOL_VALUE_ADDRESS (msym);
1279 #endif /* SOFUN_ADDRESS_MAYBE_MISSING */
1282 function_outside_compilation_unit_complaint (const char *arg1)
1284 complaint (&symfile_complaints,
1285 "function `%s' appears to be defined outside of all compilation units",
1289 /* Setup partial_symtab's describing each source file for which
1290 debugging information is available. */
1293 read_dbx_symtab (struct objfile *objfile)
1295 register struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
1296 struct internal_nlist nlist;
1297 CORE_ADDR text_addr;
1300 register char *namestring;
1302 int past_first_source_file = 0;
1303 CORE_ADDR last_o_file_start = 0;
1304 CORE_ADDR last_function_start = 0;
1305 struct cleanup *back_to;
1307 int textlow_not_set;
1308 int data_sect_index;
1310 /* Current partial symtab */
1311 struct partial_symtab *pst;
1313 /* List of current psymtab's include files */
1314 char **psymtab_include_list;
1315 int includes_allocated;
1318 /* Index within current psymtab dependency list */
1319 struct partial_symtab **dependency_list;
1320 int dependencies_used, dependencies_allocated;
1322 text_addr = DBX_TEXT_ADDR (objfile);
1323 text_size = DBX_TEXT_SIZE (objfile);
1325 /* FIXME. We probably want to change stringtab_global rather than add this
1326 while processing every symbol entry. FIXME. */
1327 file_string_table_offset = 0;
1328 next_file_string_table_offset = 0;
1330 stringtab_global = DBX_STRINGTAB (objfile);
1332 pst = (struct partial_symtab *) 0;
1334 includes_allocated = 30;
1336 psymtab_include_list = (char **) alloca (includes_allocated *
1339 dependencies_allocated = 30;
1340 dependencies_used = 0;
1342 (struct partial_symtab **) alloca (dependencies_allocated *
1343 sizeof (struct partial_symtab *));
1345 /* Init bincl list */
1346 init_bincl_list (20, objfile);
1347 back_to = make_cleanup_free_bincl_list (objfile);
1349 last_source_file = NULL;
1351 lowest_text_address = (CORE_ADDR) -1;
1353 symfile_bfd = objfile->obfd; /* For next_text_symbol */
1354 abfd = objfile->obfd;
1355 symbuf_end = symbuf_idx = 0;
1356 next_symbol_text_func = dbx_next_symbol_text;
1357 textlow_not_set = 1;
1358 has_line_numbers = 0;
1360 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1361 to global and static variables. The stab for a global or static
1362 variable doesn't give us any indication of which section it's in,
1363 so we can't tell immediately which offset in
1364 objfile->section_offsets we should apply to the variable's
1367 We could certainly find out which section contains the variable
1368 by looking up the variable's unrelocated address with
1369 find_pc_section, but that would be expensive; this is the
1370 function that constructs the partial symbol tables by examining
1371 every symbol in the entire executable, and it's
1372 performance-critical. So that expense would not be welcome. I'm
1373 not sure what to do about this at the moment.
1375 What we have done for years is to simply assume that the .data
1376 section's offset is appropriate for all global and static
1377 variables. Recently, this was expanded to fall back to the .bss
1378 section's offset if there is no .data section, and then to the
1379 .rodata section's offset. */
1380 data_sect_index = objfile->sect_index_data;
1381 if (data_sect_index == -1)
1382 data_sect_index = SECT_OFF_BSS (objfile);
1383 gdb_assert (data_sect_index != -1);
1385 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1387 /* Get the symbol for this run and pull out some info */
1388 QUIT; /* allow this to be interruptable */
1389 if (symbuf_idx == symbuf_end)
1391 bufp = &symbuf[symbuf_idx++];
1394 * Special case to speed up readin.
1396 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1398 has_line_numbers = 1;
1402 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1403 OBJSTAT (objfile, n_stabs++);
1405 /* Ok. There is a lot of code duplicated in the rest of this
1406 switch statement (for efficiency reasons). Since I don't
1407 like duplicating code, I will do my penance here, and
1408 describe the code which is duplicated:
1410 *) The assignment to namestring.
1411 *) The call to strchr.
1412 *) The addition of a partial symbol the the two partial
1413 symbol lists. This last is a large section of code, so
1414 I've imbedded it in the following macro.
1417 switch (nlist.n_type)
1421 * Standard, external, non-debugger, symbols
1424 case N_TEXT | N_EXT:
1425 case N_NBTEXT | N_EXT:
1426 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1429 case N_DATA | N_EXT:
1430 case N_NBDATA | N_EXT:
1431 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1436 case N_NBBSS | N_EXT:
1437 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
1438 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_BSS (objfile));
1443 namestring = set_namestring (objfile, nlist);
1446 record_minimal_symbol (namestring, nlist.n_value,
1447 nlist.n_type, objfile); /* Always */
1450 /* Standard, local, non-debugger, symbols */
1454 /* We need to be able to deal with both N_FN or N_TEXT,
1455 because we have no way of knowing whether the sys-supplied ld
1456 or GNU ld was used to make the executable. Sequents throw
1457 in another wrinkle -- they renumbered N_FN. */
1462 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1463 namestring = set_namestring (objfile, nlist);
1465 if ((namestring[0] == '-' && namestring[1] == 'l')
1466 || (namestring[(nsl = strlen (namestring)) - 1] == 'o'
1467 && namestring[nsl - 2] == '.'))
1469 if (objfile->ei.entry_point < nlist.n_value &&
1470 objfile->ei.entry_point >= last_o_file_start)
1472 objfile->ei.deprecated_entry_file_lowpc = last_o_file_start;
1473 objfile->ei.deprecated_entry_file_highpc = nlist.n_value;
1475 if (past_first_source_file && pst
1476 /* The gould NP1 uses low values for .o and -l symbols
1477 which are not the address. */
1478 && nlist.n_value >= pst->textlow)
1480 end_psymtab (pst, psymtab_include_list, includes_used,
1481 symnum * symbol_size,
1482 nlist.n_value > pst->texthigh
1483 ? nlist.n_value : pst->texthigh,
1484 dependency_list, dependencies_used, textlow_not_set);
1485 pst = (struct partial_symtab *) 0;
1487 dependencies_used = 0;
1490 past_first_source_file = 1;
1491 last_o_file_start = nlist.n_value;
1498 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_DATA (objfile));
1501 case N_UNDF | N_EXT:
1502 if (nlist.n_value != 0)
1504 /* This is a "Fortran COMMON" symbol. See if the target
1505 environment knows where it has been relocated to. */
1509 namestring = set_namestring (objfile, nlist);
1510 if (target_lookup_symbol (namestring, &reladdr))
1512 continue; /* Error in lookup; ignore symbol for now. */
1514 nlist.n_type ^= (N_BSS ^ N_UNDF); /* Define it as a bss-symbol */
1515 nlist.n_value = reladdr;
1516 goto bss_ext_symbol;
1518 continue; /* Just undefined, not COMMON */
1521 if (processing_acc_compilation && nlist.n_strx == 1)
1523 /* Deal with relative offsets in the string table
1524 used in ELF+STAB under Solaris. If we want to use the
1525 n_strx field, which contains the name of the file,
1526 we must adjust file_string_table_offset *before* calling
1527 set_namestring(). */
1528 past_first_source_file = 1;
1529 file_string_table_offset = next_file_string_table_offset;
1530 next_file_string_table_offset =
1531 file_string_table_offset + nlist.n_value;
1532 if (next_file_string_table_offset < file_string_table_offset)
1533 error ("string table offset backs up at %d", symnum);
1534 /* FIXME -- replace error() with complaint. */
1539 /* Lots of symbol types we can just ignore. */
1546 /* Keep going . . . */
1549 * Special symbol types for GNU
1552 case N_INDR | N_EXT:
1554 case N_SETA | N_EXT:
1556 case N_SETT | N_EXT:
1558 case N_SETD | N_EXT:
1560 case N_SETB | N_EXT:
1571 static int prev_so_symnum = -10;
1572 static int first_so_symnum;
1574 int prev_textlow_not_set;
1576 valu = nlist.n_value + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1578 prev_textlow_not_set = textlow_not_set;
1580 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1581 /* A zero value is probably an indication for the SunPRO 3.0
1582 compiler. end_psymtab explicitly tests for zero, so
1583 don't relocate it. */
1585 if (nlist.n_value == 0)
1587 textlow_not_set = 1;
1591 textlow_not_set = 0;
1593 textlow_not_set = 0;
1595 past_first_source_file = 1;
1597 if (prev_so_symnum != symnum - 1)
1598 { /* Here if prev stab wasn't N_SO */
1599 first_so_symnum = symnum;
1603 end_psymtab (pst, psymtab_include_list, includes_used,
1604 symnum * symbol_size,
1605 valu > pst->texthigh ? valu : pst->texthigh,
1606 dependency_list, dependencies_used,
1607 prev_textlow_not_set);
1608 pst = (struct partial_symtab *) 0;
1610 dependencies_used = 0;
1614 prev_so_symnum = symnum;
1616 /* End the current partial symtab and start a new one */
1618 namestring = set_namestring (objfile, nlist);
1620 /* Null name means end of .o file. Don't start a new one. */
1621 if (*namestring == '\000')
1624 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1625 The first one is a directory name; the second the file name.
1626 If pst exists, is empty, and has a filename ending in '/',
1627 we assume the previous N_SO was a directory name. */
1629 p = strrchr (namestring, '/');
1630 if (p && *(p + 1) == '\000')
1631 continue; /* Simply ignore directory name SOs */
1633 /* Some other compilers (C++ ones in particular) emit useless
1634 SOs for non-existant .c files. We ignore all subsequent SOs that
1635 immediately follow the first. */
1638 pst = start_psymtab (objfile,
1640 first_so_symnum * symbol_size,
1641 objfile->global_psymbols.next,
1642 objfile->static_psymbols.next);
1648 enum language tmp_language;
1649 /* Add this bincl to the bincl_list for future EXCLs. No
1650 need to save the string; it'll be around until
1651 read_dbx_symtab function returns */
1653 namestring = set_namestring (objfile, nlist);
1654 tmp_language = deduce_language_from_filename (namestring);
1656 /* Only change the psymtab's language if we've learned
1657 something useful (eg. tmp_language is not language_unknown).
1658 In addition, to match what start_subfile does, never change
1660 if (tmp_language != language_unknown
1661 && (tmp_language != language_c
1662 || psymtab_language != language_cplus))
1663 psymtab_language = tmp_language;
1667 /* FIXME: we should not get here without a PST to work on.
1668 Attempt to recover. */
1669 complaint (&symfile_complaints,
1670 "N_BINCL %s not in entries for any file, at symtab pos %d",
1671 namestring, symnum);
1674 add_bincl_to_list (pst, namestring, nlist.n_value);
1676 /* Mark down an include file in the current psymtab */
1678 goto record_include_file;
1683 enum language tmp_language;
1684 /* Mark down an include file in the current psymtab */
1686 namestring = set_namestring (objfile, nlist);
1687 tmp_language = deduce_language_from_filename (namestring);
1689 /* Only change the psymtab's language if we've learned
1690 something useful (eg. tmp_language is not language_unknown).
1691 In addition, to match what start_subfile does, never change
1693 if (tmp_language != language_unknown
1694 && (tmp_language != language_c
1695 || psymtab_language != language_cplus))
1696 psymtab_language = tmp_language;
1698 /* In C++, one may expect the same filename to come round many
1699 times, when code is coming alternately from the main file
1700 and from inline functions in other files. So I check to see
1701 if this is a file we've seen before -- either the main
1702 source file, or a previously included file.
1704 This seems to be a lot of time to be spending on N_SOL, but
1705 things like "break c-exp.y:435" need to work (I
1706 suppose the psymtab_include_list could be hashed or put
1707 in a binary tree, if profiling shows this is a major hog). */
1708 if (pst && STREQ (namestring, pst->filename))
1712 for (i = 0; i < includes_used; i++)
1713 if (STREQ (namestring, psymtab_include_list[i]))
1722 record_include_file:
1724 psymtab_include_list[includes_used++] = namestring;
1725 if (includes_used >= includes_allocated)
1727 char **orig = psymtab_include_list;
1729 psymtab_include_list = (char **)
1730 alloca ((includes_allocated *= 2) *
1732 memcpy (psymtab_include_list, orig,
1733 includes_used * sizeof (char *));
1737 case N_LSYM: /* Typedef or automatic variable. */
1738 case N_STSYM: /* Data seg var -- static */
1739 case N_LCSYM: /* BSS " */
1740 case N_ROSYM: /* Read-only data seg var -- static. */
1741 case N_NBSTS: /* Gould nobase. */
1742 case N_NBLCS: /* symbols. */
1744 case N_GSYM: /* Global (extern) variable; can be
1745 data or bss (sigh FIXME). */
1747 /* Following may probably be ignored; I'll leave them here
1748 for now (until I do Pascal and Modula 2 extensions). */
1750 case N_PC: /* I may or may not need this; I
1752 case N_M2C: /* I suspect that I can ignore this here. */
1753 case N_SCOPE: /* Same. */
1755 namestring = set_namestring (objfile, nlist);
1757 /* See if this is an end of function stab. */
1758 if (pst && nlist.n_type == N_FUN && *namestring == '\000')
1762 /* It's value is the size (in bytes) of the function for
1763 function relative stabs, or the address of the function's
1764 end for old style stabs. */
1765 valu = nlist.n_value + last_function_start;
1766 if (pst->texthigh == 0 || valu > pst->texthigh)
1767 pst->texthigh = valu;
1771 p = (char *) strchr (namestring, ':');
1773 continue; /* Not a debugging symbol. */
1777 /* Main processing section for debugging symbols which
1778 the initial read through the symbol tables needs to worry
1779 about. If we reach this point, the symbol which we are
1780 considering is definitely one we are interested in.
1781 p must also contain the (valid) index into the namestring
1782 which indicates the debugging type symbol. */
1787 nlist.n_value += ANOFFSET (objfile->section_offsets, data_sect_index);
1788 #ifdef STATIC_TRANSFORM_NAME
1789 namestring = STATIC_TRANSFORM_NAME (namestring);
1791 add_psymbol_to_list (namestring, p - namestring,
1792 VAR_DOMAIN, LOC_STATIC,
1793 &objfile->static_psymbols,
1795 psymtab_language, objfile);
1798 nlist.n_value += ANOFFSET (objfile->section_offsets, data_sect_index);
1799 /* The addresses in these entries are reported to be
1800 wrong. See the code that reads 'G's for symtabs. */
1801 add_psymbol_to_list (namestring, p - namestring,
1802 VAR_DOMAIN, LOC_STATIC,
1803 &objfile->global_psymbols,
1805 psymtab_language, objfile);
1809 /* When a 'T' entry is defining an anonymous enum, it
1810 may have a name which is the empty string, or a
1811 single space. Since they're not really defining a
1812 symbol, those shouldn't go in the partial symbol
1813 table. We do pick up the elements of such enums at
1814 'check_enum:', below. */
1815 if (p >= namestring + 2
1816 || (p == namestring + 1
1817 && namestring[0] != ' '))
1819 add_psymbol_to_list (namestring, p - namestring,
1820 STRUCT_DOMAIN, LOC_TYPEDEF,
1821 &objfile->static_psymbols,
1823 psymtab_language, objfile);
1826 /* Also a typedef with the same name. */
1827 add_psymbol_to_list (namestring, p - namestring,
1828 VAR_DOMAIN, LOC_TYPEDEF,
1829 &objfile->static_psymbols,
1831 psymtab_language, objfile);
1834 #if 0 /* OBSOLETE CFront */
1835 // OBSOLETE /* The semantics of C++ state that "struct foo { ... }"
1836 // OBSOLETE also defines a typedef for "foo". Unfortuantely, cfront
1837 // OBSOLETE never makes the typedef when translating from C++ to C.
1838 // OBSOLETE We make the typedef here so that "ptype foo" works as
1839 // OBSOLETE expected for cfront translated code. */
1840 // OBSOLETE else if (psymtab_language == language_cplus)
1842 // OBSOLETE /* Also a typedef with the same name. */
1843 // OBSOLETE add_psymbol_to_list (namestring, p - namestring,
1844 // OBSOLETE VAR_DOMAIN, LOC_TYPEDEF,
1845 // OBSOLETE &objfile->static_psymbols,
1846 // OBSOLETE nlist.n_value, 0,
1847 // OBSOLETE psymtab_language, objfile);
1849 #endif /* OBSOLETE CFront */
1853 if (p != namestring) /* a name is there, not just :T... */
1855 add_psymbol_to_list (namestring, p - namestring,
1856 VAR_DOMAIN, LOC_TYPEDEF,
1857 &objfile->static_psymbols,
1859 psymtab_language, objfile);
1862 /* If this is an enumerated type, we need to
1863 add all the enum constants to the partial symbol
1864 table. This does not cover enums without names, e.g.
1865 "enum {a, b} c;" in C, but fortunately those are
1866 rare. There is no way for GDB to find those from the
1867 enum type without spending too much time on it. Thus
1868 to solve this problem, the compiler needs to put out the
1869 enum in a nameless type. GCC2 does this. */
1871 /* We are looking for something of the form
1872 <name> ":" ("t" | "T") [<number> "="] "e"
1873 {<constant> ":" <value> ","} ";". */
1875 /* Skip over the colon and the 't' or 'T'. */
1877 /* This type may be given a number. Also, numbers can come
1878 in pairs like (0,26). Skip over it. */
1879 while ((*p >= '0' && *p <= '9')
1880 || *p == '(' || *p == ',' || *p == ')'
1886 /* The aix4 compiler emits extra crud before the members. */
1889 /* Skip over the type (?). */
1893 /* Skip over the colon. */
1897 /* We have found an enumerated type. */
1898 /* According to comments in read_enum_type
1899 a comma could end it instead of a semicolon.
1900 I don't know where that happens.
1902 while (*p && *p != ';' && *p != ',')
1906 /* Check for and handle cretinous dbx symbol name
1908 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
1909 p = next_symbol_text (objfile);
1911 /* Point to the character after the name
1912 of the enum constant. */
1913 for (q = p; *q && *q != ':'; q++)
1915 /* Note that the value doesn't matter for
1916 enum constants in psymtabs, just in symtabs. */
1917 add_psymbol_to_list (p, q - p,
1918 VAR_DOMAIN, LOC_CONST,
1919 &objfile->static_psymbols, 0,
1920 0, psymtab_language, objfile);
1921 /* Point past the name. */
1923 /* Skip over the value. */
1924 while (*p && *p != ',')
1926 /* Advance past the comma. */
1933 /* Constant, e.g. from "const" in Pascal. */
1934 add_psymbol_to_list (namestring, p - namestring,
1935 VAR_DOMAIN, LOC_CONST,
1936 &objfile->static_psymbols, nlist.n_value,
1937 0, psymtab_language, objfile);
1943 int name_len = p - namestring;
1944 char *name = xmalloc (name_len + 1);
1945 memcpy (name, namestring, name_len);
1946 name[name_len] = '\0';
1947 function_outside_compilation_unit_complaint (name);
1950 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
1951 /* Kludges for ELF/STABS with Sun ACC */
1952 last_function_name = namestring;
1953 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
1954 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1955 value for the bottom of the text seg in those cases. */
1956 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1957 SECT_OFF_TEXT (objfile)))
1959 CORE_ADDR minsym_valu =
1960 find_stab_function_addr (namestring, pst->filename, objfile);
1961 /* find_stab_function_addr will return 0 if the minimal
1962 symbol wasn't found. (Unfortunately, this might also
1963 be a valid address.) Anyway, if it *does* return 0,
1964 it is likely that the value was set correctly to begin
1966 if (minsym_valu != 0)
1967 nlist.n_value = minsym_valu;
1969 if (pst && textlow_not_set)
1971 pst->textlow = nlist.n_value;
1972 textlow_not_set = 0;
1977 /* Keep track of the start of the last function so we
1978 can handle end of function symbols. */
1979 last_function_start = nlist.n_value;
1981 /* In reordered executables this function may lie outside
1982 the bounds created by N_SO symbols. If that's the case
1983 use the address of this function as the low bound for
1984 the partial symbol table. */
1987 || (nlist.n_value < pst->textlow
1989 != ANOFFSET (objfile->section_offsets,
1990 SECT_OFF_TEXT (objfile))))))
1992 pst->textlow = nlist.n_value;
1993 textlow_not_set = 0;
1995 add_psymbol_to_list (namestring, p - namestring,
1996 VAR_DOMAIN, LOC_BLOCK,
1997 &objfile->static_psymbols,
1999 psymtab_language, objfile);
2002 /* Global functions were ignored here, but now they
2003 are put into the global psymtab like one would expect.
2004 They're also in the minimal symbol table. */
2008 int name_len = p - namestring;
2009 char *name = xmalloc (name_len + 1);
2010 memcpy (name, namestring, name_len);
2011 name[name_len] = '\0';
2012 function_outside_compilation_unit_complaint (name);
2015 nlist.n_value += ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
2016 /* Kludges for ELF/STABS with Sun ACC */
2017 last_function_name = namestring;
2018 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2019 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
2020 value for the bottom of the text seg in those cases. */
2021 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
2022 SECT_OFF_TEXT (objfile)))
2024 CORE_ADDR minsym_valu =
2025 find_stab_function_addr (namestring, pst->filename, objfile);
2026 /* find_stab_function_addr will return 0 if the minimal
2027 symbol wasn't found. (Unfortunately, this might also
2028 be a valid address.) Anyway, if it *does* return 0,
2029 it is likely that the value was set correctly to begin
2031 if (minsym_valu != 0)
2032 nlist.n_value = minsym_valu;
2034 if (pst && textlow_not_set)
2036 pst->textlow = nlist.n_value;
2037 textlow_not_set = 0;
2042 /* Keep track of the start of the last function so we
2043 can handle end of function symbols. */
2044 last_function_start = nlist.n_value;
2046 /* In reordered executables this function may lie outside
2047 the bounds created by N_SO symbols. If that's the case
2048 use the address of this function as the low bound for
2049 the partial symbol table. */
2052 || (nlist.n_value < pst->textlow
2054 != ANOFFSET (objfile->section_offsets,
2055 SECT_OFF_TEXT (objfile))))))
2057 pst->textlow = nlist.n_value;
2058 textlow_not_set = 0;
2060 add_psymbol_to_list (namestring, p - namestring,
2061 VAR_DOMAIN, LOC_BLOCK,
2062 &objfile->global_psymbols,
2064 psymtab_language, objfile);
2067 /* Two things show up here (hopefully); static symbols of
2068 local scope (static used inside braces) or extensions
2069 of structure symbols. We can ignore both. */
2083 case '#': /* for symbol identification (used in live ranges) */
2084 #if 0 /* OBSOLETE CFront */
2085 // OBSOLETE /* added to support cfront stabs strings */
2086 // OBSOLETE case 'Z': /* for definition continuations */
2087 // OBSOLETE case 'P': /* for prototypes */
2088 #endif /* OBSOLETE CFront */
2092 /* It is a C++ nested symbol. We don't need to record it
2093 (I don't think); if we try to look up foo::bar::baz,
2094 then symbols for the symtab containing foo should get
2095 read in, I think. */
2096 /* Someone says sun cc puts out symbols like
2097 /foo/baz/maclib::/usr/local/bin/maclib,
2098 which would get here with a symbol type of ':'. */
2102 /* Unexpected symbol descriptor. The second and subsequent stabs
2103 of a continued stab can show up here. The question is
2104 whether they ever can mimic a normal stab--it would be
2105 nice if not, since we certainly don't want to spend the
2106 time searching to the end of every string looking for
2109 complaint (&symfile_complaints, "unknown symbol descriptor `%c'",
2112 /* Ignore it; perhaps it is an extension that we don't
2119 namestring = set_namestring (objfile, nlist);
2121 /* Find the corresponding bincl and mark that psymtab on the
2122 psymtab dependency list */
2124 struct partial_symtab *needed_pst =
2125 find_corresponding_bincl_psymtab (namestring, nlist.n_value);
2127 /* If this include file was defined earlier in this file,
2129 if (needed_pst == pst)
2137 for (i = 0; i < dependencies_used; i++)
2138 if (dependency_list[i] == needed_pst)
2144 /* If it's already in the list, skip the rest. */
2148 dependency_list[dependencies_used++] = needed_pst;
2149 if (dependencies_used >= dependencies_allocated)
2151 struct partial_symtab **orig = dependency_list;
2153 (struct partial_symtab **)
2154 alloca ((dependencies_allocated *= 2)
2155 * sizeof (struct partial_symtab *));
2156 memcpy (dependency_list, orig,
2158 * sizeof (struct partial_symtab *)));
2160 fprintf_unfiltered (gdb_stderr, "Had to reallocate dependency list.\n");
2161 fprintf_unfiltered (gdb_stderr, "New dependencies allocated: %d\n",
2162 dependencies_allocated);
2170 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2171 /* Solaris 2 end of module, finish current partial symbol table.
2172 end_psymtab will set pst->texthigh to the proper value, which
2173 is necessary if a module compiled without debugging info
2174 follows this module. */
2177 end_psymtab (pst, psymtab_include_list, includes_used,
2178 symnum * symbol_size,
2180 dependency_list, dependencies_used, textlow_not_set);
2181 pst = (struct partial_symtab *) 0;
2183 dependencies_used = 0;
2190 HANDLE_RBRAC (nlist.n_value);
2196 case N_SSYM: /* Claim: Structure or union element.
2197 Hopefully, I can ignore this. */
2198 case N_ENTRY: /* Alternate entry point; can ignore. */
2199 case N_MAIN: /* Can definitely ignore this. */
2200 case N_CATCH: /* These are GNU C++ extensions */
2201 case N_EHDECL: /* that can safely be ignored here. */
2211 case N_NSYMS: /* Ultrix 4.0: symbol count */
2212 case N_DEFD: /* GNU Modula-2 */
2213 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2215 case N_OBJ: /* useless types from Solaris */
2217 /* These symbols aren't interesting; don't worry about them */
2222 /* If we haven't found it yet, ignore it. It's probably some
2223 new type we don't know about yet. */
2224 unknown_symtype_complaint (local_hex_string (nlist.n_type));
2229 /* If there's stuff to be cleaned up, clean it up. */
2230 if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */
2231 /*FIXME, does this have a bug at start address 0? */
2232 && last_o_file_start
2233 && objfile->ei.entry_point < nlist.n_value
2234 && objfile->ei.entry_point >= last_o_file_start)
2236 objfile->ei.deprecated_entry_file_lowpc = last_o_file_start;
2237 objfile->ei.deprecated_entry_file_highpc = nlist.n_value;
2242 /* Don't set pst->texthigh lower than it already is. */
2243 CORE_ADDR text_end =
2244 (lowest_text_address == (CORE_ADDR) -1
2245 ? (text_addr + ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile)))
2246 : lowest_text_address)
2249 end_psymtab (pst, psymtab_include_list, includes_used,
2250 symnum * symbol_size,
2251 text_end > pst->texthigh ? text_end : pst->texthigh,
2252 dependency_list, dependencies_used, textlow_not_set);
2255 do_cleanups (back_to);
2258 /* Allocate and partially fill a partial symtab. It will be
2259 completely filled at the end of the symbol list.
2261 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2262 is the address relative to which its symbols are (incremental) or 0
2266 static struct partial_symtab *
2267 start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
2268 int ldsymoff, struct partial_symbol **global_syms,
2269 struct partial_symbol **static_syms)
2271 struct partial_symtab *result =
2272 start_psymtab_common (objfile, objfile->section_offsets,
2273 filename, textlow, global_syms, static_syms);
2275 result->read_symtab_private = (char *)
2276 obstack_alloc (&objfile->psymbol_obstack, sizeof (struct symloc));
2277 LDSYMOFF (result) = ldsymoff;
2278 result->read_symtab = dbx_psymtab_to_symtab;
2279 SYMBOL_SIZE (result) = symbol_size;
2280 SYMBOL_OFFSET (result) = symbol_table_offset;
2281 STRING_OFFSET (result) = string_table_offset;
2282 FILE_STRING_OFFSET (result) = file_string_table_offset;
2284 /* If we're handling an ELF file, drag some section-relocation info
2285 for this source file out of the ELF symbol table, to compensate for
2286 Sun brain death. This replaces the section_offsets in this psymtab,
2288 elfstab_offset_sections (objfile, result);
2290 /* Deduce the source language from the filename for this psymtab. */
2291 psymtab_language = deduce_language_from_filename (filename);
2296 /* Close off the current usage of PST.
2297 Returns PST or NULL if the partial symtab was empty and thrown away.
2299 FIXME: List variables and peculiarities of same. */
2301 struct partial_symtab *
2302 end_psymtab (struct partial_symtab *pst, char **include_list, int num_includes,
2303 int capping_symbol_offset, CORE_ADDR capping_text,
2304 struct partial_symtab **dependency_list, int number_dependencies,
2305 int textlow_not_set)
2308 struct objfile *objfile = pst->objfile;
2310 if (capping_symbol_offset != -1)
2311 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
2312 pst->texthigh = capping_text;
2314 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
2315 /* Under Solaris, the N_SO symbols always have a value of 0,
2316 instead of the usual address of the .o file. Therefore,
2317 we have to do some tricks to fill in texthigh and textlow.
2318 The first trick is: if we see a static
2319 or global function, and the textlow for the current pst
2320 is not set (ie: textlow_not_set), then we use that function's
2321 address for the textlow of the pst. */
2323 /* Now, to fill in texthigh, we remember the last function seen
2324 in the .o file. Also, there's a hack in
2325 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2326 to here via the misc_info field. Therefore, we can fill in
2327 a reliable texthigh by taking the address plus size of the
2328 last function in the file. */
2330 if (pst->texthigh == 0 && last_function_name)
2334 struct minimal_symbol *minsym;
2336 p = strchr (last_function_name, ':');
2338 p = last_function_name;
2339 n = p - last_function_name;
2341 strncpy (p, last_function_name, n);
2344 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2347 /* Sun Fortran appends an underscore to the minimal symbol name,
2348 try again with an appended underscore if the minimal symbol
2352 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2356 pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
2358 last_function_name = NULL;
2361 /* this test will be true if the last .o file is only data */
2362 if (textlow_not_set)
2363 pst->textlow = pst->texthigh;
2366 struct partial_symtab *p1;
2368 /* If we know our own starting text address, then walk through all other
2369 psymtabs for this objfile, and if any didn't know their ending text
2370 address, set it to our starting address. Take care to not set our
2371 own ending address to our starting address, nor to set addresses on
2372 `dependency' files that have both textlow and texthigh zero. */
2374 ALL_OBJFILE_PSYMTABS (objfile, p1)
2376 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
2378 p1->texthigh = pst->textlow;
2379 /* if this file has only data, then make textlow match texthigh */
2380 if (p1->textlow == 0)
2381 p1->textlow = p1->texthigh;
2386 /* End of kludge for patching Solaris textlow and texthigh. */
2387 #endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
2389 pst->n_global_syms =
2390 objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
2391 pst->n_static_syms =
2392 objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
2394 pst->number_of_dependencies = number_dependencies;
2395 if (number_dependencies)
2397 pst->dependencies = (struct partial_symtab **)
2398 obstack_alloc (&objfile->psymbol_obstack,
2399 number_dependencies * sizeof (struct partial_symtab *));
2400 memcpy (pst->dependencies, dependency_list,
2401 number_dependencies * sizeof (struct partial_symtab *));
2404 pst->dependencies = 0;
2406 for (i = 0; i < num_includes; i++)
2408 struct partial_symtab *subpst =
2409 allocate_psymtab (include_list[i], objfile);
2411 /* Copy the sesction_offsets array from the main psymtab. */
2412 subpst->section_offsets = pst->section_offsets;
2413 subpst->read_symtab_private =
2414 (char *) obstack_alloc (&objfile->psymbol_obstack,
2415 sizeof (struct symloc));
2419 subpst->texthigh = 0;
2421 /* We could save slight bits of space by only making one of these,
2422 shared by the entire set of include files. FIXME-someday. */
2423 subpst->dependencies = (struct partial_symtab **)
2424 obstack_alloc (&objfile->psymbol_obstack,
2425 sizeof (struct partial_symtab *));
2426 subpst->dependencies[0] = pst;
2427 subpst->number_of_dependencies = 1;
2429 subpst->globals_offset =
2430 subpst->n_global_syms =
2431 subpst->statics_offset =
2432 subpst->n_static_syms = 0;
2436 subpst->read_symtab = pst->read_symtab;
2439 sort_pst_symbols (pst);
2441 /* If there is already a psymtab or symtab for a file of this name, remove it.
2442 (If there is a symtab, more drastic things also happen.)
2443 This happens in VxWorks. */
2444 free_named_symtabs (pst->filename);
2446 if (num_includes == 0
2447 && number_dependencies == 0
2448 && pst->n_global_syms == 0
2449 && pst->n_static_syms == 0
2450 && has_line_numbers == 0)
2452 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2453 it is on the obstack, but we can forget to chain it on the list. */
2454 /* Empty psymtabs happen as a result of header files which don't have
2455 any symbols in them. There can be a lot of them. But this check
2456 is wrong, in that a psymtab with N_SLINE entries but nothing else
2457 is not empty, but we don't realize that. Fixing that without slowing
2458 things down might be tricky. */
2460 discard_psymtab (pst);
2462 /* Indicate that psymtab was thrown away. */
2463 pst = (struct partial_symtab *) NULL;
2469 dbx_psymtab_to_symtab_1 (struct partial_symtab *pst)
2471 struct cleanup *old_chain;
2479 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
2484 /* Read in all partial symtabs on which this one is dependent */
2485 for (i = 0; i < pst->number_of_dependencies; i++)
2486 if (!pst->dependencies[i]->readin)
2488 /* Inform about additional files that need to be read in. */
2491 fputs_filtered (" ", gdb_stdout);
2493 fputs_filtered ("and ", gdb_stdout);
2495 printf_filtered ("%s...", pst->dependencies[i]->filename);
2496 wrap_here (""); /* Flush output */
2497 gdb_flush (gdb_stdout);
2499 dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
2502 if (LDSYMLEN (pst)) /* Otherwise it's a dummy */
2504 /* Init stuff necessary for reading in symbols */
2507 old_chain = make_cleanup (really_free_pendings, 0);
2508 file_string_table_offset = FILE_STRING_OFFSET (pst);
2509 symbol_size = SYMBOL_SIZE (pst);
2511 /* Read in this file's symbols */
2512 bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
2513 read_ofile_symtab (pst);
2515 do_cleanups (old_chain);
2521 /* Read in all of the symbols for a given psymtab for real.
2522 Be verbose about it if the user wants that. */
2525 dbx_psymtab_to_symtab (struct partial_symtab *pst)
2528 struct cleanup *back_to = NULL;
2535 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
2540 if (LDSYMLEN (pst) || pst->number_of_dependencies)
2542 /* Print the message now, before reading the string table,
2543 to avoid disconcerting pauses. */
2546 printf_filtered ("Reading in symbols for %s...", pst->filename);
2547 gdb_flush (gdb_stdout);
2550 sym_bfd = pst->objfile->obfd;
2552 next_symbol_text_func = dbx_next_symbol_text;
2554 if (DBX_STAB_SECTION (pst->objfile))
2557 = symfile_relocate_debug_section (pst->objfile->obfd,
2558 DBX_STAB_SECTION (pst->objfile),
2561 back_to = make_cleanup (free_current_contents, (void *) &stabs_data);
2564 dbx_psymtab_to_symtab_1 (pst);
2567 do_cleanups (back_to);
2569 /* Match with global symbols. This only needs to be done once,
2570 after all of the symtabs and dependencies have been read in. */
2571 scan_file_globals (pst->objfile);
2573 /* Finish up the debug error message. */
2575 printf_filtered ("done.\n");
2579 /* Read in a defined section of a specific object file's symbols. */
2582 read_ofile_symtab (struct partial_symtab *pst)
2584 register char *namestring;
2585 register struct external_nlist *bufp;
2586 struct internal_nlist nlist;
2588 unsigned max_symnum;
2590 struct objfile *objfile;
2591 int sym_offset; /* Offset to start of symbols to read */
2592 int sym_size; /* Size of symbols to read */
2593 CORE_ADDR text_offset; /* Start of text segment for symbols */
2594 int text_size; /* Size of text segment for symbols */
2595 struct section_offsets *section_offsets;
2597 objfile = pst->objfile;
2598 sym_offset = LDSYMOFF (pst);
2599 sym_size = LDSYMLEN (pst);
2600 text_offset = pst->textlow;
2601 text_size = pst->texthigh - pst->textlow;
2602 /* This cannot be simply objfile->section_offsets because of
2603 elfstab_offset_sections() which initializes the psymtab section
2604 offsets information in a special way, and that is different from
2605 objfile->section_offsets. */
2606 section_offsets = pst->section_offsets;
2608 current_objfile = objfile;
2609 subfile_stack = NULL;
2611 stringtab_global = DBX_STRINGTAB (objfile);
2612 last_source_file = NULL;
2614 abfd = objfile->obfd;
2615 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
2616 symbuf_end = symbuf_idx = 0;
2618 symbuf_left = sym_offset + sym_size;
2620 /* It is necessary to actually read one symbol *before* the start
2621 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2622 occurs before the N_SO symbol.
2624 Detecting this in read_dbx_symtab
2625 would slow down initial readin, so we look for it here instead. */
2626 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
2628 stabs_seek (sym_offset - symbol_size);
2630 bufp = &symbuf[symbuf_idx++];
2631 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2632 OBJSTAT (objfile, n_stabs++);
2634 namestring = set_namestring (objfile, nlist);
2636 processing_gcc_compilation = 0;
2637 if (nlist.n_type == N_TEXT)
2639 const char *tempstring = namestring;
2641 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
2642 processing_gcc_compilation = 1;
2643 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
2644 processing_gcc_compilation = 2;
2645 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
2647 if (STREQN (tempstring, "__gnu_compiled", 14))
2648 processing_gcc_compilation = 2;
2651 /* Try to select a C++ demangling based on the compilation unit
2655 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2656 know whether it will use the old style or v3 mangling. */
2657 if (processing_gcc_compilation)
2659 if (AUTO_DEMANGLING)
2661 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2668 /* The N_SO starting this symtab is the first symbol, so we
2669 better not check the symbol before it. I'm not this can
2670 happen, but it doesn't hurt to check for it. */
2671 stabs_seek (sym_offset);
2672 processing_gcc_compilation = 0;
2675 if (symbuf_idx == symbuf_end)
2677 bufp = &symbuf[symbuf_idx];
2678 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
2679 error ("First symbol in segment of executable not a source symbol");
2681 max_symnum = sym_size / symbol_size;
2684 symnum < max_symnum;
2687 QUIT; /* Allow this to be interruptable */
2688 if (symbuf_idx == symbuf_end)
2690 bufp = &symbuf[symbuf_idx++];
2691 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2692 OBJSTAT (objfile, n_stabs++);
2694 type = bfd_h_get_8 (abfd, bufp->e_type);
2696 namestring = set_namestring (objfile, nlist);
2700 process_one_symbol (type, nlist.n_desc, nlist.n_value,
2701 namestring, section_offsets, objfile);
2703 /* We skip checking for a new .o or -l file; that should never
2704 happen in this routine. */
2705 else if (type == N_TEXT)
2707 /* I don't think this code will ever be executed, because
2708 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2709 the N_SO symbol which starts this source file.
2710 However, there is no reason not to accept
2711 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2713 if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
2714 processing_gcc_compilation = 1;
2715 else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
2716 processing_gcc_compilation = 2;
2719 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2720 know whether it will use the old style or v3 mangling. */
2721 if (AUTO_DEMANGLING)
2723 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2727 else if (type & N_EXT || type == (unsigned char) N_TEXT
2728 || type == (unsigned char) N_NBTEXT
2731 /* Global symbol: see if we came across a dbx defintion for
2732 a corresponding symbol. If so, store the value. Remove
2733 syms from the chain when their values are stored, but
2734 search the whole chain, as there may be several syms from
2735 different files with the same name. */
2736 /* This is probably not true. Since the files will be read
2737 in one at a time, each reference to a global symbol will
2738 be satisfied in each file as it appears. So we skip this
2744 current_objfile = NULL;
2746 /* In a Solaris elf file, this variable, which comes from the
2747 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2748 which comes from pst->textlow is correct. */
2749 if (last_source_start_addr == 0)
2750 last_source_start_addr = text_offset;
2752 /* In reordered executables last_source_start_addr may not be the
2753 lower bound for this symtab, instead use text_offset which comes
2754 from pst->textlow which is correct. */
2755 if (last_source_start_addr > text_offset)
2756 last_source_start_addr = text_offset;
2758 pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT (objfile));
2760 #if 0 /* OBSOLETE CFront */
2761 // OBSOLETE /* Process items which we had to "process_later" due to dependencies
2762 // OBSOLETE on other stabs. */
2763 // OBSOLETE process_now (objfile);
2764 #endif /* OBSOLETE CFront */
2769 /* This handles a single symbol from the symbol-file, building symbols
2770 into a GDB symtab. It takes these arguments and an implicit argument.
2772 TYPE is the type field of the ".stab" symbol entry.
2773 DESC is the desc field of the ".stab" entry.
2774 VALU is the value field of the ".stab" entry.
2775 NAME is the symbol name, in our address space.
2776 SECTION_OFFSETS is a set of amounts by which the sections of this object
2777 file were relocated when it was loaded into memory.
2778 Note that these section_offsets are not the
2779 objfile->section_offsets but the pst->section_offsets.
2780 All symbols that refer
2781 to memory locations need to be offset by these amounts.
2782 OBJFILE is the object file from which we are reading symbols.
2783 It is used in end_symtab. */
2786 process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
2787 struct section_offsets *section_offsets,
2788 struct objfile *objfile)
2790 #ifdef SUN_FIXED_LBRAC_BUG
2791 /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
2792 to correct the address of N_LBRAC's. If it is not defined, then
2793 we never need to correct the addresses. */
2795 /* This records the last pc address we've seen. We depend on there being
2796 an SLINE or FUN or SO before the first LBRAC, since the variable does
2797 not get reset in between reads of different symbol files. */
2798 static CORE_ADDR last_pc_address;
2801 register struct context_stack *new;
2802 /* This remembers the address of the start of a function. It is used
2803 because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
2804 relative to the current function's start address. On systems
2805 other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
2806 used to relocate these symbol types rather than SECTION_OFFSETS. */
2807 static CORE_ADDR function_start_offset;
2809 /* This holds the address of the start of a function, without the system
2810 peculiarities of function_start_offset. */
2811 static CORE_ADDR last_function_start;
2813 /* If this is nonzero, we've seen an N_SLINE since the start of the
2814 current function. We use this to tell us to move the first sline
2815 to the beginning of the function regardless of what its given
2817 static int sline_found_in_function = 1;
2819 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
2820 file. Used to detect the SunPRO solaris compiler. */
2821 static int n_opt_found;
2823 /* The stab type used for the definition of the last function.
2824 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2825 static int function_stab_type = 0;
2827 if (!block_address_function_relative)
2828 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2829 function start address, so just use the text offset. */
2830 function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2832 /* Something is wrong if we see real data before
2833 seeing a source file name. */
2835 if (last_source_file == NULL && type != (unsigned char) N_SO)
2837 /* Ignore any symbols which appear before an N_SO symbol.
2838 Currently no one puts symbols there, but we should deal
2839 gracefully with the case. A complain()t might be in order,
2840 but this should not be an error (). */
2849 if (*name == '\000')
2851 /* This N_FUN marks the end of a function. This closes off the
2854 if (context_stack_depth <= 0)
2856 lbrac_mismatch_complaint (symnum);
2860 /* The following check is added before recording line 0 at
2861 end of function so as to handle hand-generated stabs
2862 which may have an N_FUN stabs at the end of the function, but
2863 no N_SLINE stabs. */
2864 if (sline_found_in_function)
2865 record_line (current_subfile, 0, last_function_start + valu);
2867 within_function = 0;
2868 new = pop_context ();
2870 /* Make a block for the local symbols within. */
2871 finish_block (new->name, &local_symbols, new->old_blocks,
2872 new->start_addr, new->start_addr + valu,
2875 /* May be switching to an assembler file which may not be using
2876 block relative stabs, so reset the offset. */
2877 if (block_address_function_relative)
2878 function_start_offset = 0;
2883 sline_found_in_function = 0;
2885 /* Relocate for dynamic loading */
2886 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2887 valu = SMASH_TEXT_ADDRESS (valu);
2888 last_function_start = valu;
2890 goto define_a_symbol;
2893 /* This "symbol" just indicates the start of an inner lexical
2894 context within a function. */
2896 /* Ignore extra outermost context from SunPRO cc and acc. */
2897 if (n_opt_found && desc == 1)
2900 if (block_address_function_relative)
2901 /* Relocate for Sun ELF acc fn-relative syms. */
2902 valu += function_start_offset;
2904 /* On most machines, the block addresses are relative to the
2905 N_SO, the linker did not relocate them (sigh). */
2906 valu += last_source_start_addr;
2908 #ifdef SUN_FIXED_LBRAC_BUG
2909 if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address)
2911 /* Patch current LBRAC pc value to match last handy pc value */
2912 complaint (&symfile_complaints, "bad block start address patched");
2913 valu = last_pc_address;
2916 new = push_context (desc, valu);
2920 /* This "symbol" just indicates the end of an inner lexical
2921 context that was started with N_LBRAC. */
2923 /* Ignore extra outermost context from SunPRO cc and acc. */
2924 if (n_opt_found && desc == 1)
2927 if (block_address_function_relative)
2928 /* Relocate for Sun ELF acc fn-relative syms. */
2929 valu += function_start_offset;
2931 /* On most machines, the block addresses are relative to the
2932 N_SO, the linker did not relocate them (sigh). */
2933 valu += last_source_start_addr;
2935 if (context_stack_depth <= 0)
2937 lbrac_mismatch_complaint (symnum);
2941 new = pop_context ();
2942 if (desc != new->depth)
2943 lbrac_mismatch_complaint (symnum);
2945 /* Some compilers put the variable decls inside of an
2946 LBRAC/RBRAC block. This macro should be nonzero if this
2947 is true. DESC is N_DESC from the N_RBRAC symbol.
2948 GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
2949 or the GCC2_COMPILED_SYMBOL. */
2950 #if !defined (VARIABLES_INSIDE_BLOCK)
2951 #define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
2954 /* Can only use new->locals as local symbols here if we're in
2955 gcc or on a machine that puts them before the lbrack. */
2956 if (!VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2958 if (local_symbols != NULL)
2960 /* GCC development snapshots from March to December of
2961 2000 would output N_LSYM entries after N_LBRAC
2962 entries. As a consequence, these symbols are simply
2963 discarded. Complain if this is the case. Note that
2964 there are some compilers which legitimately put local
2965 symbols within an LBRAC/RBRAC block; this complaint
2966 might also help sort out problems in which
2967 VARIABLES_INSIDE_BLOCK is incorrectly defined. */
2968 complaint (&symfile_complaints,
2969 "misplaced N_LBRAC entry; discarding local symbols which have no enclosing block");
2971 local_symbols = new->locals;
2974 if (context_stack_depth
2975 > !VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
2977 /* This is not the outermost LBRAC...RBRAC pair in the function,
2978 its local symbols preceded it, and are the ones just recovered
2979 from the context stack. Define the block for them (but don't
2980 bother if the block contains no symbols. Should we complain
2981 on blocks without symbols? I can't think of any useful purpose
2983 if (local_symbols != NULL)
2985 /* Muzzle a compiler bug that makes end < start. (which
2986 compilers? Is this ever harmful?). */
2987 if (new->start_addr > valu)
2989 complaint (&symfile_complaints,
2990 "block start larger than block end");
2991 new->start_addr = valu;
2993 /* Make a block for the local symbols within. */
2994 finish_block (0, &local_symbols, new->old_blocks,
2995 new->start_addr, valu, objfile);
3000 /* This is the outermost LBRAC...RBRAC pair. There is no
3001 need to do anything; leave the symbols that preceded it
3002 to be attached to the function's own block. We need to
3003 indicate that we just moved outside of the function. */
3004 within_function = 0;
3007 if (VARIABLES_INSIDE_BLOCK (desc, processing_gcc_compilation))
3008 /* Now pop locals of block just finished. */
3009 local_symbols = new->locals;
3014 /* This kind of symbol indicates the start of an object file. */
3015 /* Relocate for dynamic loading */
3016 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3020 /* This type of symbol indicates the start of data
3021 for one source file.
3022 Finish the symbol table of the previous source file
3023 (if any) and start accumulating a new symbol table. */
3024 /* Relocate for dynamic loading */
3025 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3029 #ifdef SUN_FIXED_LBRAC_BUG
3030 last_pc_address = valu; /* Save for SunOS bug circumcision */
3033 #ifdef PCC_SOL_BROKEN
3034 /* pcc bug, occasionally puts out SO for SOL. */
3035 if (context_stack_depth > 0)
3037 start_subfile (name, NULL);
3041 if (last_source_file)
3043 /* Check if previous symbol was also an N_SO (with some
3044 sanity checks). If so, that one was actually the directory
3045 name, and the current one is the real file name.
3047 if (previous_stab_code == (unsigned char) N_SO)
3049 patch_subfile_names (current_subfile, name);
3050 break; /* Ignore repeated SOs */
3052 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
3056 /* Null name means this just marks the end of text for this .o file.
3057 Don't start a new symtab in this case. */
3058 if (*name == '\000')
3061 if (block_address_function_relative)
3062 function_start_offset = 0;
3065 start_symtab (name, NULL, valu);
3066 record_debugformat ("stabs");
3070 /* This type of symbol indicates the start of data for
3071 a sub-source-file, one whose contents were copied or
3072 included in the compilation of the main source file
3073 (whose name was given in the N_SO symbol.) */
3074 /* Relocate for dynamic loading */
3075 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3076 start_subfile (name, current_subfile->dirname);
3081 add_new_header_file (name, valu);
3082 start_subfile (name, current_subfile->dirname);
3086 start_subfile (pop_subfile (), current_subfile->dirname);
3090 add_old_header_file (name, valu);
3094 /* This type of "symbol" really just records
3095 one line-number -- core-address correspondence.
3096 Enter it in the line list for this symbol table. */
3098 /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
3099 valu += function_start_offset;
3101 #ifdef SUN_FIXED_LBRAC_BUG
3102 last_pc_address = valu; /* Save for SunOS bug circumcision */
3104 /* If this is the first SLINE note in the function, record it at
3105 the start of the function instead of at the listed location. */
3106 if (within_function && sline_found_in_function == 0)
3108 record_line (current_subfile, desc, last_function_start);
3109 sline_found_in_function = 1;
3112 record_line (current_subfile, desc, valu);
3116 common_block_start (name, objfile);
3120 common_block_end (objfile);
3123 /* The following symbol types need to have the appropriate offset added
3124 to their value; then we process symbol definitions in the name. */
3126 case N_STSYM: /* Static symbol in data seg */
3127 case N_LCSYM: /* Static symbol in BSS seg */
3128 case N_ROSYM: /* Static symbol in Read-only data seg */
3129 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3130 Solaris2's stabs-in-elf makes *most* symbols relative
3131 but leaves a few absolute (at least for Solaris 2.1 and version
3132 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
3133 .stab "foo:S...",N_STSYM is absolute (ld relocates it)
3134 .stab "foo:V...",N_STSYM is relative (section base subtracted).
3135 This leaves us no choice but to search for the 'S' or 'V'...
3136 (or pass the whole section_offsets stuff down ONE MORE function
3137 call level, which we really don't want to do). */
3141 /* .o files and NLMs have non-zero text seg offsets, but don't need
3142 their static syms offset in this fashion. XXX - This is really a
3143 crock that should be fixed in the solib handling code so that I
3144 don't have to work around it here. */
3146 if (!symfile_relocatable)
3148 p = strchr (name, ':');
3149 if (p != 0 && p[1] == 'S')
3151 /* The linker relocated it. We don't want to add an
3152 elfstab_offset_sections-type offset, but we *do* want
3153 to add whatever solib.c passed to symbol_file_add as
3154 addr (this is known to affect SunOS4, and I suspect ELF
3155 too). Since elfstab_offset_sections currently does not
3156 muck with the text offset (there is no Ttext.text
3157 symbol), we can get addr from the text offset. If
3158 elfstab_offset_sections ever starts dealing with the
3159 text offset, and we still need to do this, we need to
3160 invent a SECT_OFF_ADDR_KLUDGE or something. */
3161 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3162 goto define_a_symbol;
3165 /* Since it's not the kludge case, re-dispatch to the right handler. */
3175 internal_error (__FILE__, __LINE__, "failed internal consistency check");
3179 case_N_STSYM: /* Static symbol in data seg */
3180 case N_DSLINE: /* Source line number, data seg */
3181 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
3182 goto define_a_symbol;
3184 case_N_LCSYM: /* Static symbol in BSS seg */
3185 case N_BSLINE: /* Source line number, bss seg */
3186 /* N_BROWS: overlaps with N_BSLINE */
3187 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
3188 goto define_a_symbol;
3190 case_N_ROSYM: /* Static symbol in Read-only data seg */
3191 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
3192 goto define_a_symbol;
3194 case N_ENTRY: /* Alternate entry point */
3195 /* Relocate for dynamic loading */
3196 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3197 goto define_a_symbol;
3199 /* The following symbol types we don't know how to process. Handle
3200 them in a "default" way, but complain to people who care. */
3202 case N_CATCH: /* Exception handler catcher */
3203 case N_EHDECL: /* Exception handler name */
3204 case N_PC: /* Global symbol in Pascal */
3205 case N_M2C: /* Modula-2 compilation unit */
3206 /* N_MOD2: overlaps with N_EHDECL */
3207 case N_SCOPE: /* Modula-2 scope information */
3208 case N_ECOML: /* End common (local name) */
3209 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
3214 unknown_symtype_complaint (local_hex_string (type));
3217 /* The following symbol types don't need the address field relocated,
3218 since it is either unused, or is absolute. */
3220 case N_GSYM: /* Global variable */
3221 case N_NSYMS: /* Number of symbols (ultrix) */
3222 case N_NOMAP: /* No map? (ultrix) */
3223 case N_RSYM: /* Register variable */
3224 case N_DEFD: /* Modula-2 GNU module dependency */
3225 case N_SSYM: /* Struct or union element */
3226 case N_LSYM: /* Local symbol in stack */
3227 case N_PSYM: /* Parameter variable */
3228 case N_LENG: /* Length of preceding symbol type */
3232 char *colon_pos = strchr (name, ':');
3233 if (colon_pos == NULL)
3236 deftype = colon_pos[1];
3242 function_stab_type = type;
3244 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
3245 /* Deal with the SunPRO 3.0 compiler which omits the address
3246 from N_FUN symbols. */
3248 && valu == ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile)))
3250 CORE_ADDR minsym_valu =
3251 find_stab_function_addr (name, last_source_file, objfile);
3253 /* find_stab_function_addr will return 0 if the minimal
3254 symbol wasn't found. (Unfortunately, this might also
3255 be a valid address.) Anyway, if it *does* return 0,
3256 it is likely that the value was set correctly to begin
3258 if (minsym_valu != 0)
3263 #ifdef SUN_FIXED_LBRAC_BUG
3264 /* The Sun acc compiler, under SunOS4, puts out
3265 functions with N_GSYM or N_STSYM. The problem is
3266 that the address of the symbol is no good (for N_GSYM
3267 it doesn't even attept an address; for N_STSYM it
3268 puts out an address but then it gets relocated
3269 relative to the data segment, not the text segment).
3270 Currently we can't fix this up later as we do for
3271 some types of symbol in scan_file_globals.
3272 Fortunately we do have a way of finding the address -
3273 we know that the value in last_pc_address is either
3274 the one we want (if we're dealing with the first
3275 function in an object file), or somewhere in the
3276 previous function. This means that we can use the
3277 minimal symbol table to get the address. */
3279 /* Starting with release 3.0, the Sun acc compiler,
3280 under SunOS4, puts out functions with N_FUN and a value
3281 of zero. This gets relocated to the start of the text
3282 segment of the module, which is no good either.
3283 Under SunOS4 we can deal with this as N_SLINE and N_SO
3284 entries contain valid absolute addresses.
3285 Release 3.0 acc also puts out N_OPT entries, which makes
3286 it possible to discern acc from cc or gcc. */
3288 if (type == N_GSYM || type == N_STSYM
3290 && n_opt_found && !block_address_function_relative))
3292 struct minimal_symbol *m;
3293 int l = colon_pos - name;
3295 m = lookup_minimal_symbol_by_pc (last_pc_address);
3296 if (m && STREQN (DEPRECATED_SYMBOL_NAME (m), name, l)
3297 && DEPRECATED_SYMBOL_NAME (m)[l] == '\0')
3298 /* last_pc_address was in this function */
3299 valu = SYMBOL_VALUE (m);
3300 else if (m && DEPRECATED_SYMBOL_NAME (m + 1)
3301 && STREQN (DEPRECATED_SYMBOL_NAME (m + 1), name, l)
3302 && DEPRECATED_SYMBOL_NAME (m + 1)[l] == '\0')
3303 /* last_pc_address was in last function */
3304 valu = SYMBOL_VALUE (m + 1);
3306 /* Not found - use last_pc_address (for finish_block) */
3307 valu = last_pc_address;
3310 last_pc_address = valu; /* Save for SunOS bug circumcision */
3313 if (block_address_function_relative)
3314 /* For Solaris 2.0 compilers, the block addresses and
3315 N_SLINE's are relative to the start of the
3316 function. On normal systems, and when using gcc on
3317 Solaris 2.0, these addresses are just absolute, or
3318 relative to the N_SO, depending on
3319 BLOCK_ADDRESS_ABSOLUTE. */
3320 function_start_offset = valu;
3322 within_function = 1;
3324 if (context_stack_depth > 1)
3326 complaint (&symfile_complaints,
3327 "unmatched N_LBRAC before symtab pos %d", symnum);
3331 if (context_stack_depth > 0)
3333 new = pop_context ();
3334 /* Make a block for the local symbols within. */
3335 finish_block (new->name, &local_symbols, new->old_blocks,
3336 new->start_addr, valu, objfile);
3339 new = push_context (0, valu);
3340 new->name = define_symbol (valu, name, desc, type, objfile);
3344 define_symbol (valu, name, desc, type, objfile);
3350 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3351 for a bunch of other flags, too. Someday we may parse their
3352 flags; for now we ignore theirs and hope they'll ignore ours. */
3353 case N_OPT: /* Solaris 2: Compiler options */
3356 if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL))
3358 processing_gcc_compilation = 2;
3359 #if 0 /* Works, but is experimental. -fnf */
3360 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
3361 know whether it will use the old style or v3 mangling. */
3362 if (AUTO_DEMANGLING)
3364 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
3373 case N_MAIN: /* Name of main routine. */
3374 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3375 it with a symbol file with "main" and without N_MAIN. I'm
3376 not sure exactly what rule to follow but probably something
3377 like: N_MAIN takes precedence over "main" no matter what
3378 objfile it is in; If there is more than one N_MAIN, choose
3379 the one in the symfile_objfile; If there is more than one
3380 N_MAIN within a given objfile, complain() and choose
3381 arbitrarily. (kingdon) */
3383 set_main_name (name);
3386 /* The following symbol types can be ignored. */
3387 case N_OBJ: /* Solaris 2: Object file dir and name */
3388 /* N_UNDF: Solaris 2: file separator mark */
3389 /* N_UNDF: -- we will never encounter it, since we only process one
3390 file's symbols at once. */
3391 case N_ENDM: /* Solaris 2: End of module */
3392 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
3396 /* '#' is a GNU C extension to allow one symbol to refer to another
3399 Generally this is used so that an alias can refer to its main
3403 /* Initialize symbol reference names and determine if this is
3404 a definition. If symbol reference is being defined, go
3405 ahead and add it. Otherwise, just return sym. */
3410 /* If this stab defines a new reference ID that is not on the
3411 reference list, then put it on the reference list.
3413 We go ahead and advance NAME past the reference, even though
3414 it is not strictly necessary at this time. */
3415 refnum = symbol_reference_defined (&s);
3417 if (!ref_search (refnum))
3418 ref_add (refnum, 0, name, valu);
3423 previous_stab_code = type;
3426 /* FIXME: The only difference between this and elfstab_build_psymtabs
3427 is the call to install_minimal_symbols for elf, and the support for
3428 split sections. If the differences are really that small, the code
3429 should be shared. */
3431 /* Scan and build partial symbols for an coff symbol file.
3432 The coff file has already been processed to get its minimal symbols.
3434 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3437 OBJFILE is the object file we are reading symbols from.
3438 ADDR is the address relative to which the symbols are (e.g.
3439 the base address of the text segment).
3440 MAINLINE is true if we are reading the main symbol
3441 table (as opposed to a shared lib or dynamically loaded file).
3442 TEXTADDR is the address of the text section.
3443 TEXTSIZE is the size of the text section.
3444 STABSECTS is the list of .stab sections in OBJFILE.
3445 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3446 .stabstr section exists.
3448 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3449 adjusted for coff details. */
3452 coffstab_build_psymtabs (struct objfile *objfile, int mainline,
3453 CORE_ADDR textaddr, unsigned int textsize,
3454 struct stab_section_list *stabsects,
3455 file_ptr stabstroffset, unsigned int stabstrsize)
3458 bfd *sym_bfd = objfile->obfd;
3459 char *name = bfd_get_filename (sym_bfd);
3460 struct dbx_symfile_info *info;
3461 unsigned int stabsize;
3463 /* There is already a dbx_symfile_info allocated by our caller.
3464 It might even contain some info from the coff symtab to help us. */
3465 info = objfile->sym_stab_info;
3467 DBX_TEXT_ADDR (objfile) = textaddr;
3468 DBX_TEXT_SIZE (objfile) = textsize;
3470 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3471 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
3472 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3474 if (stabstrsize > bfd_get_size (sym_bfd))
3475 error ("ridiculous string table size: %d bytes", stabstrsize);
3476 DBX_STRINGTAB (objfile) = (char *)
3477 obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
3478 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3480 /* Now read in the string table in one big gulp. */
3482 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3484 perror_with_name (name);
3485 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3486 if (val != stabstrsize)
3487 perror_with_name (name);
3489 stabsread_new_init ();
3490 buildsym_new_init ();
3491 free_header_files ();
3492 init_header_files ();
3494 processing_acc_compilation = 1;
3496 /* In a coff file, we've already installed the minimal symbols that came
3497 from the coff (non-stab) symbol table, so always act like an
3498 incremental load here. */
3499 if (stabsects->next == NULL)
3501 stabsize = bfd_section_size (sym_bfd, stabsects->section);
3502 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
3503 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3507 struct stab_section_list *stabsect;
3509 DBX_SYMCOUNT (objfile) = 0;
3510 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
3512 stabsize = bfd_section_size (sym_bfd, stabsect->section);
3513 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
3516 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3518 symbuf_sections = stabsects->next;
3519 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
3523 dbx_symfile_read (objfile, 0);
3526 /* Scan and build partial symbols for an ELF symbol file.
3527 This ELF file has already been processed to get its minimal symbols,
3528 and any DWARF symbols that were in it.
3530 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3533 OBJFILE is the object file we are reading symbols from.
3534 ADDR is the address relative to which the symbols are (e.g.
3535 the base address of the text segment).
3536 MAINLINE is true if we are reading the main symbol
3537 table (as opposed to a shared lib or dynamically loaded file).
3538 STABSECT is the BFD section information for the .stab section.
3539 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3540 .stabstr section exists.
3542 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3543 adjusted for elf details. */
3546 elfstab_build_psymtabs (struct objfile *objfile, int mainline,
3548 file_ptr stabstroffset, unsigned int stabstrsize)
3551 bfd *sym_bfd = objfile->obfd;
3552 char *name = bfd_get_filename (sym_bfd);
3553 struct dbx_symfile_info *info;
3554 struct cleanup *back_to = NULL;
3556 /* There is already a dbx_symfile_info allocated by our caller.
3557 It might even contain some info from the ELF symtab to help us. */
3558 info = objfile->sym_stab_info;
3560 /* Find the first and last text address. dbx_symfile_read seems to
3562 find_text_range (sym_bfd, objfile);
3564 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3565 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
3566 DBX_SYMCOUNT (objfile)
3567 = bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile);
3568 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3569 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
3570 DBX_STAB_SECTION (objfile) = stabsect;
3572 if (stabstrsize > bfd_get_size (sym_bfd))
3573 error ("ridiculous string table size: %d bytes", stabstrsize);
3574 DBX_STRINGTAB (objfile) = (char *)
3575 obstack_alloc (&objfile->psymbol_obstack, stabstrsize + 1);
3576 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3578 /* Now read in the string table in one big gulp. */
3580 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3582 perror_with_name (name);
3583 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3584 if (val != stabstrsize)
3585 perror_with_name (name);
3587 stabsread_new_init ();
3588 buildsym_new_init ();
3589 free_header_files ();
3590 init_header_files ();
3592 processing_acc_compilation = 1;
3595 symbuf_left = bfd_section_size (objfile->obfd, stabsect);
3596 stabs_data = symfile_relocate_debug_section (objfile->obfd, stabsect, NULL);
3598 back_to = make_cleanup (free_current_contents, (void *) &stabs_data);
3600 /* In an elf file, we've already installed the minimal symbols that came
3601 from the elf (non-stab) symbol table, so always act like an
3602 incremental load here. dbx_symfile_read should not generate any new
3603 minimal symbols, since we will have already read the ELF dynamic symbol
3604 table and normal symbol entries won't be in the ".stab" section; but in
3605 case it does, it will install them itself. */
3606 dbx_symfile_read (objfile, 0);
3609 do_cleanups (back_to);
3612 /* Scan and build partial symbols for a file with special sections for stabs
3613 and stabstrings. The file has already been processed to get its minimal
3614 symbols, and any other symbols that might be necessary to resolve GSYMs.
3616 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3619 OBJFILE is the object file we are reading symbols from.
3620 ADDR is the address relative to which the symbols are (e.g. the base address
3621 of the text segment).
3622 MAINLINE is true if we are reading the main symbol table (as opposed to a
3623 shared lib or dynamically loaded file).
3624 STAB_NAME is the name of the section that contains the stabs.
3625 STABSTR_NAME is the name of the section that contains the stab strings.
3627 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3630 stabsect_build_psymtabs (struct objfile *objfile, int mainline, char *stab_name,
3631 char *stabstr_name, char *text_name)
3634 bfd *sym_bfd = objfile->obfd;
3635 char *name = bfd_get_filename (sym_bfd);
3637 asection *stabstrsect;
3638 asection *text_sect;
3640 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
3641 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
3647 error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
3648 stab_name, stabstr_name);
3650 objfile->sym_stab_info = (struct dbx_symfile_info *)
3651 xmalloc (sizeof (struct dbx_symfile_info));
3652 memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
3654 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
3656 error ("Can't find %s section in symbol file", text_name);
3657 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
3658 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
3660 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
3661 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
3662 / DBX_SYMBOL_SIZE (objfile);
3663 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
3664 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3666 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
3667 error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile));
3668 DBX_STRINGTAB (objfile) = (char *)
3669 obstack_alloc (&objfile->psymbol_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
3670 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
3672 /* Now read in the string table in one big gulp. */
3674 val = bfd_get_section_contents (sym_bfd, /* bfd */
3675 stabstrsect, /* bfd section */
3676 DBX_STRINGTAB (objfile), /* input buffer */
3677 0, /* offset into section */
3678 DBX_STRINGTAB_SIZE (objfile)); /* amount to read */
3681 perror_with_name (name);
3683 stabsread_new_init ();
3684 buildsym_new_init ();
3685 free_header_files ();
3686 init_header_files ();
3688 /* Now, do an incremental load */
3690 processing_acc_compilation = 1;
3691 dbx_symfile_read (objfile, 0);
3694 static struct sym_fns aout_sym_fns =
3696 bfd_target_aout_flavour,
3697 dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */
3698 dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */
3699 dbx_symfile_read, /* sym_read: read a symbol file into symtab */
3700 dbx_symfile_finish, /* sym_finish: finished with file, cleanup */
3701 default_symfile_offsets, /* sym_offsets: parse user's offsets to internal form */
3702 NULL /* next: pointer to next struct sym_fns */
3706 _initialize_dbxread (void)
3708 add_symtab_fns (&aout_sym_fns);