1 /* Read dbx symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2008.
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 3 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, see <http://www.gnu.org/licenses/>. */
21 /* This module provides three functions: dbx_symfile_init,
22 which initializes to read a symbol file; dbx_new_init, which
23 discards existing cached information when all symbols are being
24 discarded; and dbx_symfile_read, which reads a symbol table
27 dbx_symfile_read only does the minimum work necessary for letting the
28 user "name" things symbolically; it does not read the entire symtab.
29 Instead, it reads the external and static symbols and puts them in partial
30 symbol tables. When more extensive information is requested of a
31 file, the corresponding partial symbol table is mutated into a full
32 fledged symbol table by going back and reading the symbols
33 for real. dbx_psymtab_to_symtab() is the function that does this */
36 #include "gdb_string.h"
38 #if defined(__CYGNUSCLIB__)
39 #include <sys/types.h>
43 #include "gdb_obstack.h"
46 #include "breakpoint.h"
48 #include "gdbcore.h" /* for bfd stuff */
49 #include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
52 #include "stabsread.h"
53 #include "gdb-stabs.h"
55 #include "complaints.h"
57 #include "cp-support.h"
59 #include "gdb_assert.h"
60 #include "gdb_string.h"
62 #include "aout/aout64.h"
63 #include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
66 /* We put a pointer to this structure in the read_symtab_private field
71 /* Offset within the file symbol table of first local symbol for this
76 /* Length (in bytes) of the section of the symbol table devoted to
77 this file's symbols (actually, the section bracketed may contain
78 more than just this file's symbols). If ldsymlen is 0, the only
79 reason for this thing's existence is the dependency list. Nothing
80 else will happen when it is read in. */
84 /* The size of each symbol in the symbol file (in external form). */
88 /* Further information needed to locate the symbols if they are in
93 int file_string_offset;
96 #define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
97 #define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
98 #define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
99 #define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
100 #define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
101 #define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
102 #define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
105 /* Remember what we deduced to be the source language of this psymtab. */
107 static enum language psymtab_language = language_unknown;
109 /* The BFD for this file -- implicit parameter to next_symbol_text. */
111 static bfd *symfile_bfd;
113 /* The size of each symbol in the symbol file (in external form).
114 This is set by dbx_symfile_read when building psymtabs, and by
115 dbx_psymtab_to_symtab when building symtabs. */
117 static unsigned symbol_size;
119 /* This is the offset of the symbol table in the executable file. */
121 static unsigned symbol_table_offset;
123 /* This is the offset of the string table in the executable file. */
125 static unsigned string_table_offset;
127 /* For elf+stab executables, the n_strx field is not a simple index
128 into the string table. Instead, each .o file has a base offset in
129 the string table, and the associated symbols contain offsets from
130 this base. The following two variables contain the base offset for
131 the current and next .o files. */
133 static unsigned int file_string_table_offset;
134 static unsigned int next_file_string_table_offset;
136 /* .o and NLM files contain unrelocated addresses which are based at
137 0. When non-zero, this flag disables some of the special cases for
138 Solaris elf+stab text addresses at location 0. */
140 static int symfile_relocatable = 0;
142 /* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
143 relative to the function start address. */
145 static int block_address_function_relative = 0;
147 /* The lowest text address we have yet encountered. This is needed
148 because in an a.out file, there is no header field which tells us
149 what address the program is actually going to be loaded at, so we
150 need to make guesses based on the symbols (which *are* relocated to
151 reflect the address it will be loaded at). */
153 static CORE_ADDR lowest_text_address;
155 /* Non-zero if there is any line number info in the objfile. Prevents
156 end_psymtab from discarding an otherwise empty psymtab. */
158 static int has_line_numbers;
160 /* Complaints about the symbols we have encountered. */
163 unknown_symtype_complaint (const char *arg1)
165 complaint (&symfile_complaints, _("unknown symbol type %s"), arg1);
169 lbrac_mismatch_complaint (int arg1)
171 complaint (&symfile_complaints,
172 _("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1);
176 repeated_header_complaint (const char *arg1, int arg2)
178 complaint (&symfile_complaints,
179 _("\"repeated\" header file %s not previously seen, at symtab \
184 /* find_text_range --- find start and end of loadable code sections
186 The find_text_range function finds the shortest address range that
187 encloses all sections containing executable code, and stores it in
188 objfile's text_addr and text_size members.
190 dbx_symfile_read will use this to finish off the partial symbol
191 table, in some cases. */
194 find_text_range (bfd * sym_bfd, struct objfile *objfile)
201 for (sec = sym_bfd->sections; sec; sec = sec->next)
202 if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
204 CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
205 CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
209 if (sec_start < start)
224 error (_("Can't find any code sections in symbol file"));
226 DBX_TEXT_ADDR (objfile) = start;
227 DBX_TEXT_SIZE (objfile) = end - start;
232 /* During initial symbol readin, we need to have a structure to keep
233 track of which psymtabs have which bincls in them. This structure
234 is used during readin to setup the list of dependencies within each
235 partial symbol table. */
237 struct header_file_location
239 char *name; /* Name of header file */
240 int instance; /* See above */
241 struct partial_symtab *pst; /* Partial symtab that has the
242 BINCL/EINCL defs for this file */
245 /* The actual list and controling variables */
246 static struct header_file_location *bincl_list, *next_bincl;
247 static int bincls_allocated;
249 /* Local function prototypes */
251 extern void _initialize_dbxread (void);
253 static void read_ofile_symtab (struct partial_symtab *);
255 static void dbx_psymtab_to_symtab (struct partial_symtab *);
257 static void dbx_psymtab_to_symtab_1 (struct partial_symtab *);
259 static void read_dbx_dynamic_symtab (struct objfile *objfile);
261 static void read_dbx_symtab (struct objfile *);
263 static void free_bincl_list (struct objfile *);
265 static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
267 static void add_bincl_to_list (struct partial_symtab *, char *, int);
269 static void init_bincl_list (int, struct objfile *);
271 static char *dbx_next_symbol_text (struct objfile *);
273 static void fill_symbuf (bfd *);
275 static void dbx_symfile_init (struct objfile *);
277 static void dbx_new_init (struct objfile *);
279 static void dbx_symfile_read (struct objfile *, int);
281 static void dbx_symfile_finish (struct objfile *);
283 static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);
285 static void add_new_header_file (char *, int);
287 static void add_old_header_file (char *, int);
289 static void add_this_object_header_file (int);
291 static struct partial_symtab *start_psymtab (struct objfile *, char *,
293 struct partial_symbol **,
294 struct partial_symbol **);
296 /* Free up old header file tables */
299 free_header_files (void)
301 if (this_object_header_files)
303 xfree (this_object_header_files);
304 this_object_header_files = NULL;
306 n_allocated_this_object_header_files = 0;
309 /* Allocate new header file tables */
312 init_header_files (void)
314 n_allocated_this_object_header_files = 10;
315 this_object_header_files = (int *) xmalloc (10 * sizeof (int));
318 /* Add header file number I for this object file
319 at the next successive FILENUM. */
322 add_this_object_header_file (int i)
324 if (n_this_object_header_files == n_allocated_this_object_header_files)
326 n_allocated_this_object_header_files *= 2;
327 this_object_header_files
328 = (int *) xrealloc ((char *) this_object_header_files,
329 n_allocated_this_object_header_files * sizeof (int));
332 this_object_header_files[n_this_object_header_files++] = i;
335 /* Add to this file an "old" header file, one already seen in
336 a previous object file. NAME is the header file's name.
337 INSTANCE is its instance code, to select among multiple
338 symbol tables for the same header file. */
341 add_old_header_file (char *name, int instance)
343 struct header_file *p = HEADER_FILES (current_objfile);
346 for (i = 0; i < N_HEADER_FILES (current_objfile); i++)
347 if (strcmp (p[i].name, name) == 0 && instance == p[i].instance)
349 add_this_object_header_file (i);
352 repeated_header_complaint (name, symnum);
355 /* Add to this file a "new" header file: definitions for its types follow.
356 NAME is the header file's name.
357 Most often this happens only once for each distinct header file,
358 but not necessarily. If it happens more than once, INSTANCE has
359 a different value each time, and references to the header file
360 use INSTANCE values to select among them.
362 dbx output contains "begin" and "end" markers for each new header file,
363 but at this level we just need to know which files there have been;
364 so we record the file when its "begin" is seen and ignore the "end". */
367 add_new_header_file (char *name, int instance)
370 struct header_file *hfile;
372 /* Make sure there is room for one more header file. */
374 i = N_ALLOCATED_HEADER_FILES (current_objfile);
376 if (N_HEADER_FILES (current_objfile) == i)
380 N_ALLOCATED_HEADER_FILES (current_objfile) = 10;
381 HEADER_FILES (current_objfile) = (struct header_file *)
382 xmalloc (10 * sizeof (struct header_file));
387 N_ALLOCATED_HEADER_FILES (current_objfile) = i;
388 HEADER_FILES (current_objfile) = (struct header_file *)
389 xrealloc ((char *) HEADER_FILES (current_objfile),
390 (i * sizeof (struct header_file)));
394 /* Create an entry for this header file. */
396 i = N_HEADER_FILES (current_objfile)++;
397 hfile = HEADER_FILES (current_objfile) + i;
398 hfile->name = xstrdup (name);
399 hfile->instance = instance;
402 = (struct type **) xmalloc (10 * sizeof (struct type *));
403 memset (hfile->vector, 0, 10 * sizeof (struct type *));
405 add_this_object_header_file (i);
409 static struct type **
410 explicit_lookup_type (int real_filenum, int index)
412 struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum];
414 if (index >= f->length)
417 f->vector = (struct type **)
418 xrealloc (f->vector, f->length * sizeof (struct type *));
419 memset (&f->vector[f->length / 2],
420 '\0', f->length * sizeof (struct type *) / 2);
422 return &f->vector[index];
427 record_minimal_symbol (char *name, CORE_ADDR address, int type,
428 struct objfile *objfile)
430 enum minimal_symbol_type ms_type;
432 asection *bfd_section;
438 section = SECT_OFF_TEXT (objfile);
439 bfd_section = DBX_TEXT_SECTION (objfile);
443 section = SECT_OFF_DATA (objfile);
444 bfd_section = DBX_DATA_SECTION (objfile);
448 section = SECT_OFF_BSS (objfile);
449 bfd_section = DBX_BSS_SECTION (objfile);
459 section = SECT_OFF_DATA (objfile);
460 bfd_section = DBX_DATA_SECTION (objfile);
463 /* I don't think this type actually exists; since a N_SETV is the result
464 of going over many .o files, it doesn't make sense to have one
466 ms_type = mst_file_data;
467 section = SECT_OFF_DATA (objfile);
468 bfd_section = DBX_DATA_SECTION (objfile);
475 ms_type = mst_file_text;
476 section = SECT_OFF_TEXT (objfile);
477 bfd_section = DBX_TEXT_SECTION (objfile);
480 ms_type = mst_file_data;
482 /* Check for __DYNAMIC, which is used by Sun shared libraries.
483 Record it as global even if it's local, not global, so
484 lookup_minimal_symbol can find it. We don't check symbol_leading_char
485 because for SunOS4 it always is '_'. */
486 if (name[8] == 'C' && strcmp ("__DYNAMIC", name) == 0)
489 /* Same with virtual function tables, both global and static. */
491 char *tempstring = name;
492 if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
494 if (is_vtable_name (tempstring))
497 section = SECT_OFF_DATA (objfile);
498 bfd_section = DBX_DATA_SECTION (objfile);
501 ms_type = mst_file_bss;
502 section = SECT_OFF_BSS (objfile);
503 bfd_section = DBX_BSS_SECTION (objfile);
506 ms_type = mst_unknown;
512 if ((ms_type == mst_file_text || ms_type == mst_text)
513 && address < lowest_text_address)
514 lowest_text_address = address;
516 prim_record_minimal_symbol_and_info
517 (name, address, ms_type, section, bfd_section, objfile);
520 /* Scan and build partial symbols for a symbol file.
521 We have been initialized by a call to dbx_symfile_init, which
522 put all the relevant info into a "struct dbx_symfile_info",
523 hung off the objfile structure.
525 MAINLINE is true if we are reading the main symbol
526 table (as opposed to a shared lib or dynamically loaded file). */
529 dbx_symfile_read (struct objfile *objfile, int mainline)
533 struct cleanup *back_to;
535 sym_bfd = objfile->obfd;
537 /* .o and .nlm files are relocatables with text, data and bss segs based at
538 0. This flag disables special (Solaris stabs-in-elf only) fixups for
539 symbols with a value of 0. */
541 symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
543 /* This is true for Solaris (and all other systems which put stabs
544 in sections, hopefully, since it would be silly to do things
545 differently from Solaris), and false for SunOS4 and other a.out
547 block_address_function_relative =
548 ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
549 || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
550 || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
551 || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
552 || (0 == strncmp (bfd_get_target (sym_bfd), "epoc-pe", 7))
553 || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
555 val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
557 perror_with_name (objfile->name);
559 /* If we are reinitializing, or if we have never loaded syms yet, init */
561 || (objfile->global_psymbols.size == 0
562 && objfile->static_psymbols.size == 0))
563 init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
565 symbol_size = DBX_SYMBOL_SIZE (objfile);
566 symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
568 free_pending_blocks ();
569 back_to = make_cleanup (really_free_pendings, 0);
571 init_minimal_symbol_collection ();
572 make_cleanup_discard_minimal_symbols ();
574 /* Read stabs data from executable file and define symbols. */
576 read_dbx_symtab (objfile);
578 /* Add the dynamic symbols. */
580 read_dbx_dynamic_symtab (objfile);
582 /* Install any minimal symbols that have been collected as the current
583 minimal symbols for this objfile. */
585 install_minimal_symbols (objfile);
587 do_cleanups (back_to);
590 /* Initialize anything that needs initializing when a completely new
591 symbol file is specified (not just adding some symbols from another
592 file, e.g. a shared library). */
595 dbx_new_init (struct objfile *ignore)
597 stabsread_new_init ();
598 buildsym_new_init ();
599 init_header_files ();
603 /* dbx_symfile_init ()
604 is the dbx-specific initialization routine for reading symbols.
605 It is passed a struct objfile which contains, among other things,
606 the BFD for the file whose symbols are being read, and a slot for a pointer
607 to "private data" which we fill with goodies.
609 We read the string table into malloc'd space and stash a pointer to it.
611 Since BFD doesn't know how to read debug symbols in a format-independent
612 way (and may never do so...), we have to do it ourselves. We will never
613 be called unless this is an a.out (or very similar) file.
614 FIXME, there should be a cleaner peephole into the BFD environment here. */
616 #define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
619 dbx_symfile_init (struct objfile *objfile)
622 bfd *sym_bfd = objfile->obfd;
623 char *name = bfd_get_filename (sym_bfd);
625 unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
627 /* Allocate struct to keep track of the symfile */
628 objfile->deprecated_sym_stab_info = (struct dbx_symfile_info *)
629 xmalloc (sizeof (struct dbx_symfile_info));
630 memset (objfile->deprecated_sym_stab_info, 0,
631 sizeof (struct dbx_symfile_info));
633 DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
634 DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
635 DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
637 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
638 #define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
639 #define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
641 /* FIXME POKING INSIDE BFD DATA STRUCTURES */
643 DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
645 text_sect = bfd_get_section_by_name (sym_bfd, ".text");
647 error (_("Can't find .text section in symbol file"));
648 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
649 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
651 DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
652 DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
653 DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
655 /* Read the string table and stash it away in the objfile_obstack.
656 When we blow away the objfile the string table goes away as well.
657 Note that gdb used to use the results of attempting to malloc the
658 string table, based on the size it read, as a form of sanity check
659 for botched byte swapping, on the theory that a byte swapped string
660 table size would be so totally bogus that the malloc would fail. Now
661 that we put in on the objfile_obstack, we can't do this since gdb gets
662 a fatal error (out of virtual memory) if the size is bogus. We can
663 however at least check to see if the size is less than the size of
664 the size field itself, or larger than the size of the entire file.
665 Note that all valid string tables have a size greater than zero, since
666 the bytes used to hold the size are included in the count. */
668 if (STRING_TABLE_OFFSET == 0)
670 /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
671 will never be zero, even when there is no string table. This
672 would appear to be a bug in bfd. */
673 DBX_STRINGTAB_SIZE (objfile) = 0;
674 DBX_STRINGTAB (objfile) = NULL;
678 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
680 perror_with_name (name);
682 memset (size_temp, 0, sizeof (size_temp));
683 val = bfd_bread (size_temp, sizeof (size_temp), sym_bfd);
686 perror_with_name (name);
690 /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
691 EOF if there is no string table, and attempting to read the size
692 from EOF will read zero bytes. */
693 DBX_STRINGTAB_SIZE (objfile) = 0;
694 DBX_STRINGTAB (objfile) = NULL;
698 /* Read some data that would appear to be the string table size.
699 If there really is a string table, then it is probably the right
700 size. Byteswap if necessary and validate the size. Note that
701 the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
702 random data that happened to be at STRING_TABLE_OFFSET, because
703 bfd can't tell us there is no string table, the sanity checks may
704 or may not catch this. */
705 DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
707 if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
708 || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
709 error (_("ridiculous string table size (%d bytes)."),
710 DBX_STRINGTAB_SIZE (objfile));
712 DBX_STRINGTAB (objfile) =
713 (char *) obstack_alloc (&objfile->objfile_obstack,
714 DBX_STRINGTAB_SIZE (objfile));
715 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
717 /* Now read in the string table in one big gulp. */
719 val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
721 perror_with_name (name);
722 val = bfd_bread (DBX_STRINGTAB (objfile),
723 DBX_STRINGTAB_SIZE (objfile),
725 if (val != DBX_STRINGTAB_SIZE (objfile))
726 perror_with_name (name);
731 /* Perform any local cleanups required when we are done with a particular
732 objfile. I.E, we are in the process of discarding all symbol information
733 for an objfile, freeing up all memory held for it, and unlinking the
734 objfile struct from the global list of known objfiles. */
737 dbx_symfile_finish (struct objfile *objfile)
739 if (objfile->deprecated_sym_stab_info != NULL)
741 if (HEADER_FILES (objfile) != NULL)
743 int i = N_HEADER_FILES (objfile);
744 struct header_file *hfiles = HEADER_FILES (objfile);
748 xfree (hfiles[i].name);
749 xfree (hfiles[i].vector);
753 xfree (objfile->deprecated_sym_stab_info);
755 free_header_files ();
759 /* Buffer for reading the symbol table entries. */
760 static struct external_nlist symbuf[4096];
761 static int symbuf_idx;
762 static int symbuf_end;
764 /* Name of last function encountered. Used in Solaris to approximate
765 object file boundaries. */
766 static char *last_function_name;
768 /* The address in memory of the string table of the object file we are
769 reading (which might not be the "main" object file, but might be a
770 shared library or some other dynamically loaded thing). This is
771 set by read_dbx_symtab when building psymtabs, and by
772 read_ofile_symtab when building symtabs, and is used only by
773 next_symbol_text. FIXME: If that is true, we don't need it when
774 building psymtabs, right? */
775 static char *stringtab_global;
777 /* These variables are used to control fill_symbuf when the stabs
778 symbols are not contiguous (as may be the case when a COFF file is
779 linked using --split-by-reloc). */
780 static struct stab_section_list *symbuf_sections;
781 static unsigned int symbuf_left;
782 static unsigned int symbuf_read;
784 /* This variable stores a global stabs buffer, if we read stabs into
785 memory in one chunk in order to process relocations. */
786 static bfd_byte *stabs_data;
788 /* Refill the symbol table input buffer
789 and set the variables that control fetching entries from it.
790 Reports an error if no data available.
791 This function can read past the end of the symbol table
792 (into the string table) but this does no harm. */
795 fill_symbuf (bfd *sym_bfd)
802 nbytes = sizeof (symbuf);
803 if (nbytes > symbuf_left)
804 nbytes = symbuf_left;
805 memcpy (symbuf, stabs_data + symbuf_read, nbytes);
807 else if (symbuf_sections == NULL)
809 count = sizeof (symbuf);
810 nbytes = bfd_bread (symbuf, count, sym_bfd);
814 if (symbuf_left <= 0)
816 file_ptr filepos = symbuf_sections->section->filepos;
817 if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
818 perror_with_name (bfd_get_filename (sym_bfd));
819 symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
820 symbol_table_offset = filepos - symbuf_read;
821 symbuf_sections = symbuf_sections->next;
825 if (count > sizeof (symbuf))
826 count = sizeof (symbuf);
827 nbytes = bfd_bread (symbuf, count, sym_bfd);
831 perror_with_name (bfd_get_filename (sym_bfd));
832 else if (nbytes == 0)
833 error (_("Premature end of file reading symbol table"));
834 symbuf_end = nbytes / symbol_size;
836 symbuf_left -= nbytes;
837 symbuf_read += nbytes;
841 stabs_seek (int sym_offset)
845 symbuf_read += sym_offset;
846 symbuf_left -= sym_offset;
849 bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
852 #define INTERNALIZE_SYMBOL(intern, extern, abfd) \
854 (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
855 (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
856 (intern).n_other = 0; \
857 (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
858 if (bfd_get_sign_extend_vma (abfd)) \
859 (intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
861 (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
864 /* Invariant: The symbol pointed to by symbuf_idx is the first one
865 that hasn't been swapped. Swap the symbol at the same time
866 that symbuf_idx is incremented. */
868 /* dbx allows the text of a symbol name to be continued into the
869 next symbol name! When such a continuation is encountered
870 (a \ at the end of the text of a name)
871 call this function to get the continuation. */
874 dbx_next_symbol_text (struct objfile *objfile)
876 struct internal_nlist nlist;
878 if (symbuf_idx == symbuf_end)
879 fill_symbuf (symfile_bfd);
882 INTERNALIZE_SYMBOL (nlist, &symbuf[symbuf_idx], symfile_bfd);
883 OBJSTAT (objfile, n_stabs++);
887 return nlist.n_strx + stringtab_global + file_string_table_offset;
890 /* Initialize the list of bincls to contain none and have some
894 init_bincl_list (int number, struct objfile *objfile)
896 bincls_allocated = number;
897 next_bincl = bincl_list = (struct header_file_location *)
898 xmalloc (bincls_allocated * sizeof (struct header_file_location));
901 /* Add a bincl to the list. */
904 add_bincl_to_list (struct partial_symtab *pst, char *name, int instance)
906 if (next_bincl >= bincl_list + bincls_allocated)
908 int offset = next_bincl - bincl_list;
909 bincls_allocated *= 2;
910 bincl_list = (struct header_file_location *)
911 xrealloc ((char *) bincl_list,
912 bincls_allocated * sizeof (struct header_file_location));
913 next_bincl = bincl_list + offset;
915 next_bincl->pst = pst;
916 next_bincl->instance = instance;
917 next_bincl++->name = name;
920 /* Given a name, value pair, find the corresponding
921 bincl in the list. Return the partial symtab associated
922 with that header_file_location. */
924 static struct partial_symtab *
925 find_corresponding_bincl_psymtab (char *name, int instance)
927 struct header_file_location *bincl;
929 for (bincl = bincl_list; bincl < next_bincl; bincl++)
930 if (bincl->instance == instance
931 && strcmp (name, bincl->name) == 0)
934 repeated_header_complaint (name, symnum);
935 return (struct partial_symtab *) 0;
938 /* Free the storage allocated for the bincl list. */
941 free_bincl_list (struct objfile *objfile)
944 bincls_allocated = 0;
948 do_free_bincl_list_cleanup (void *objfile)
950 free_bincl_list (objfile);
953 static struct cleanup *
954 make_cleanup_free_bincl_list (struct objfile *objfile)
956 return make_cleanup (do_free_bincl_list_cleanup, objfile);
959 /* Set namestring based on nlist. If the string table index is invalid,
960 give a fake name, and print a single error message per symbol file read,
961 rather than abort the symbol reading or flood the user with messages. */
964 set_namestring (struct objfile *objfile, const struct internal_nlist *nlist)
968 if (((unsigned) nlist->n_strx + file_string_table_offset)
969 >= DBX_STRINGTAB_SIZE (objfile))
971 complaint (&symfile_complaints, _("bad string table offset in symbol %d"),
973 namestring = "<bad string table offset>";
976 namestring = (nlist->n_strx + file_string_table_offset
977 + DBX_STRINGTAB (objfile));
981 /* Scan a SunOs dynamic symbol table for symbols of interest and
982 add them to the minimal symbol table. */
985 read_dbx_dynamic_symtab (struct objfile *objfile)
987 bfd *abfd = objfile->obfd;
988 struct cleanup *back_to;
1001 /* Check that the symbol file has dynamic symbols that we know about.
1002 bfd_arch_unknown can happen if we are reading a sun3 symbol file
1003 on a sun4 host (and vice versa) and bfd is not configured
1004 --with-target=all. This would trigger an assertion in bfd/sunos.c,
1005 so we ignore the dynamic symbols in this case. */
1006 if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
1007 || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
1008 || bfd_get_arch (abfd) == bfd_arch_unknown)
1011 dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
1012 if (dynsym_size < 0)
1015 dynsyms = (asymbol **) xmalloc (dynsym_size);
1016 back_to = make_cleanup (xfree, dynsyms);
1018 dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
1019 if (dynsym_count < 0)
1021 do_cleanups (back_to);
1025 /* Enter dynamic symbols into the minimal symbol table
1026 if this is a stripped executable. */
1027 if (bfd_get_symcount (abfd) <= 0)
1030 for (counter = 0; counter < dynsym_count; counter++, symptr++)
1032 asymbol *sym = *symptr;
1036 sec = bfd_get_section (sym);
1038 /* BFD symbols are section relative. */
1039 sym_value = sym->value + sec->vma;
1041 if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
1043 sym_value += ANOFFSET (objfile->section_offsets,
1044 SECT_OFF_TEXT (objfile));
1047 else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
1049 sym_value += ANOFFSET (objfile->section_offsets,
1050 SECT_OFF_DATA (objfile));
1053 else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
1055 sym_value += ANOFFSET (objfile->section_offsets,
1056 SECT_OFF_BSS (objfile));
1062 if (sym->flags & BSF_GLOBAL)
1065 record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
1070 /* Symbols from shared libraries have a dynamic relocation entry
1071 that points to the associated slot in the procedure linkage table.
1072 We make a mininal symbol table entry with type mst_solib_trampoline
1073 at the address in the procedure linkage table. */
1074 dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
1075 if (dynrel_size < 0)
1077 do_cleanups (back_to);
1081 dynrels = (arelent **) xmalloc (dynrel_size);
1082 make_cleanup (xfree, dynrels);
1084 dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
1085 if (dynrel_count < 0)
1087 do_cleanups (back_to);
1091 for (counter = 0, relptr = dynrels;
1092 counter < dynrel_count;
1093 counter++, relptr++)
1095 arelent *rel = *relptr;
1097 rel->address + ANOFFSET (objfile->section_offsets,
1098 SECT_OFF_DATA (objfile));
1100 switch (bfd_get_arch (abfd))
1102 case bfd_arch_sparc:
1103 if (rel->howto->type != RELOC_JMP_SLOT)
1107 /* `16' is the type BFD produces for a jump table relocation. */
1108 if (rel->howto->type != 16)
1111 /* Adjust address in the jump table to point to
1112 the start of the bsr instruction. */
1119 name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
1120 prim_record_minimal_symbol (name, address, mst_solib_trampoline,
1124 do_cleanups (back_to);
1128 find_stab_function_addr (char *namestring, char *filename,
1129 struct objfile *objfile)
1131 struct minimal_symbol *msym;
1135 p = strchr (namestring, ':');
1140 strncpy (p, namestring, n);
1143 msym = lookup_minimal_symbol (p, filename, objfile);
1146 /* Sun Fortran appends an underscore to the minimal symbol name,
1147 try again with an appended underscore if the minimal symbol
1151 msym = lookup_minimal_symbol (p, filename, objfile);
1154 if (msym == NULL && filename != NULL)
1156 /* Try again without the filename. */
1158 msym = lookup_minimal_symbol (p, NULL, objfile);
1160 if (msym == NULL && filename != NULL)
1162 /* And try again for Sun Fortran, but without the filename. */
1165 msym = lookup_minimal_symbol (p, NULL, objfile);
1168 return msym == NULL ? 0 : SYMBOL_VALUE_ADDRESS (msym);
1172 function_outside_compilation_unit_complaint (const char *arg1)
1174 complaint (&symfile_complaints,
1175 _("function `%s' appears to be defined outside of all compilation \
1180 /* Setup partial_symtab's describing each source file for which
1181 debugging information is available. */
1184 read_dbx_symtab (struct objfile *objfile)
1186 struct gdbarch *gdbarch = get_objfile_arch (objfile);
1187 struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
1188 struct internal_nlist nlist;
1189 CORE_ADDR text_addr;
1196 int past_first_source_file = 0;
1197 CORE_ADDR last_o_file_start = 0;
1198 CORE_ADDR last_function_start = 0;
1199 struct cleanup *back_to;
1201 int textlow_not_set;
1202 int data_sect_index;
1204 /* Current partial symtab */
1205 struct partial_symtab *pst;
1207 /* List of current psymtab's include files */
1208 char **psymtab_include_list;
1209 int includes_allocated;
1212 /* Index within current psymtab dependency list */
1213 struct partial_symtab **dependency_list;
1214 int dependencies_used, dependencies_allocated;
1216 text_addr = DBX_TEXT_ADDR (objfile);
1217 text_size = DBX_TEXT_SIZE (objfile);
1219 /* FIXME. We probably want to change stringtab_global rather than add this
1220 while processing every symbol entry. FIXME. */
1221 file_string_table_offset = 0;
1222 next_file_string_table_offset = 0;
1224 stringtab_global = DBX_STRINGTAB (objfile);
1226 pst = (struct partial_symtab *) 0;
1228 includes_allocated = 30;
1230 psymtab_include_list = (char **) alloca (includes_allocated *
1233 dependencies_allocated = 30;
1234 dependencies_used = 0;
1236 (struct partial_symtab **) alloca (dependencies_allocated *
1237 sizeof (struct partial_symtab *));
1239 /* Init bincl list */
1240 init_bincl_list (20, objfile);
1241 back_to = make_cleanup_free_bincl_list (objfile);
1243 last_source_file = NULL;
1245 lowest_text_address = (CORE_ADDR) -1;
1247 symfile_bfd = objfile->obfd; /* For next_text_symbol */
1248 abfd = objfile->obfd;
1249 symbuf_end = symbuf_idx = 0;
1250 next_symbol_text_func = dbx_next_symbol_text;
1251 textlow_not_set = 1;
1252 has_line_numbers = 0;
1254 /* FIXME: jimb/2003-09-12: We don't apply the right section's offset
1255 to global and static variables. The stab for a global or static
1256 variable doesn't give us any indication of which section it's in,
1257 so we can't tell immediately which offset in
1258 objfile->section_offsets we should apply to the variable's
1261 We could certainly find out which section contains the variable
1262 by looking up the variable's unrelocated address with
1263 find_pc_section, but that would be expensive; this is the
1264 function that constructs the partial symbol tables by examining
1265 every symbol in the entire executable, and it's
1266 performance-critical. So that expense would not be welcome. I'm
1267 not sure what to do about this at the moment.
1269 What we have done for years is to simply assume that the .data
1270 section's offset is appropriate for all global and static
1271 variables. Recently, this was expanded to fall back to the .bss
1272 section's offset if there is no .data section, and then to the
1273 .rodata section's offset. */
1274 data_sect_index = objfile->sect_index_data;
1275 if (data_sect_index == -1)
1276 data_sect_index = SECT_OFF_BSS (objfile);
1277 if (data_sect_index == -1)
1278 data_sect_index = SECT_OFF_RODATA (objfile);
1280 /* If data_sect_index is still -1, that's okay. It's perfectly fine
1281 for the file to have no .data, no .bss, and no .text at all, if
1282 it also has no global or static variables. If it does, we will
1283 get an internal error from an ANOFFSET macro below when we try to
1284 use data_sect_index. */
1286 for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
1288 /* Get the symbol for this run and pull out some info */
1289 QUIT; /* allow this to be interruptable */
1290 if (symbuf_idx == symbuf_end)
1292 bufp = &symbuf[symbuf_idx++];
1295 * Special case to speed up readin.
1297 if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
1299 has_line_numbers = 1;
1303 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
1304 OBJSTAT (objfile, n_stabs++);
1306 /* Ok. There is a lot of code duplicated in the rest of this
1307 switch statement (for efficiency reasons). Since I don't
1308 like duplicating code, I will do my penance here, and
1309 describe the code which is duplicated:
1311 *) The assignment to namestring.
1312 *) The call to strchr.
1313 *) The addition of a partial symbol the the two partial
1314 symbol lists. This last is a large section of code, so
1315 I've imbedded it in the following macro.
1318 switch (nlist.n_type)
1321 * Standard, external, non-debugger, symbols
1324 case N_TEXT | N_EXT:
1325 case N_NBTEXT | N_EXT:
1326 nlist.n_value += ANOFFSET (objfile->section_offsets,
1327 SECT_OFF_TEXT (objfile));
1330 case N_DATA | N_EXT:
1331 case N_NBDATA | N_EXT:
1332 nlist.n_value += ANOFFSET (objfile->section_offsets,
1333 SECT_OFF_DATA (objfile));
1338 case N_NBBSS | N_EXT:
1339 case N_SETV | N_EXT: /* FIXME, is this in BSS? */
1340 nlist.n_value += ANOFFSET (objfile->section_offsets,
1341 SECT_OFF_BSS (objfile));
1346 namestring = set_namestring (objfile, &nlist);
1349 record_minimal_symbol (namestring, nlist.n_value,
1350 nlist.n_type, objfile); /* Always */
1353 /* Standard, local, non-debugger, symbols */
1357 /* We need to be able to deal with both N_FN or N_TEXT,
1358 because we have no way of knowing whether the sys-supplied ld
1359 or GNU ld was used to make the executable. Sequents throw
1360 in another wrinkle -- they renumbered N_FN. */
1365 nlist.n_value += ANOFFSET (objfile->section_offsets,
1366 SECT_OFF_TEXT (objfile));
1367 namestring = set_namestring (objfile, &nlist);
1369 if ((namestring[0] == '-' && namestring[1] == 'l')
1370 || (namestring[(nsl = strlen (namestring)) - 1] == 'o'
1371 && namestring[nsl - 2] == '.'))
1373 if (past_first_source_file && pst
1374 /* The gould NP1 uses low values for .o and -l symbols
1375 which are not the address. */
1376 && nlist.n_value >= pst->textlow)
1378 end_psymtab (pst, psymtab_include_list, includes_used,
1379 symnum * symbol_size,
1380 nlist.n_value > pst->texthigh
1381 ? nlist.n_value : pst->texthigh,
1382 dependency_list, dependencies_used,
1384 pst = (struct partial_symtab *) 0;
1386 dependencies_used = 0;
1387 has_line_numbers = 0;
1390 past_first_source_file = 1;
1391 last_o_file_start = nlist.n_value;
1398 nlist.n_value += ANOFFSET (objfile->section_offsets,
1399 SECT_OFF_DATA (objfile));
1402 case N_UNDF | N_EXT:
1403 if (nlist.n_value != 0)
1405 /* This is a "Fortran COMMON" symbol. See if the target
1406 environment knows where it has been relocated to. */
1410 namestring = set_namestring (objfile, &nlist);
1411 if (target_lookup_symbol (namestring, &reladdr))
1413 continue; /* Error in lookup; ignore symbol for now. */
1415 nlist.n_type ^= (N_BSS ^ N_UNDF); /* Define it as a bss-symbol */
1416 nlist.n_value = reladdr;
1417 goto bss_ext_symbol;
1419 continue; /* Just undefined, not COMMON */
1422 if (processing_acc_compilation && nlist.n_strx == 1)
1424 /* Deal with relative offsets in the string table
1425 used in ELF+STAB under Solaris. If we want to use the
1426 n_strx field, which contains the name of the file,
1427 we must adjust file_string_table_offset *before* calling
1428 set_namestring(). */
1429 past_first_source_file = 1;
1430 file_string_table_offset = next_file_string_table_offset;
1431 next_file_string_table_offset =
1432 file_string_table_offset + nlist.n_value;
1433 if (next_file_string_table_offset < file_string_table_offset)
1434 error (_("string table offset backs up at %d"), symnum);
1435 /* FIXME -- replace error() with complaint. */
1440 /* Lots of symbol types we can just ignore. */
1447 /* Keep going . . . */
1450 * Special symbol types for GNU
1453 case N_INDR | N_EXT:
1455 case N_SETA | N_EXT:
1457 case N_SETT | N_EXT:
1459 case N_SETD | N_EXT:
1461 case N_SETB | N_EXT:
1472 static int prev_so_symnum = -10;
1473 static int first_so_symnum;
1475 static char *dirname_nso;
1476 int prev_textlow_not_set;
1478 valu = nlist.n_value + ANOFFSET (objfile->section_offsets,
1479 SECT_OFF_TEXT (objfile));
1481 prev_textlow_not_set = textlow_not_set;
1483 /* A zero value is probably an indication for the SunPRO 3.0
1484 compiler. end_psymtab explicitly tests for zero, so
1485 don't relocate it. */
1487 if (nlist.n_value == 0
1488 && gdbarch_sofun_address_maybe_missing (gdbarch))
1490 textlow_not_set = 1;
1494 textlow_not_set = 0;
1496 past_first_source_file = 1;
1498 if (prev_so_symnum != symnum - 1)
1499 { /* Here if prev stab wasn't N_SO */
1500 first_so_symnum = symnum;
1504 end_psymtab (pst, psymtab_include_list, includes_used,
1505 symnum * symbol_size,
1506 valu > pst->texthigh ? valu : pst->texthigh,
1507 dependency_list, dependencies_used,
1508 prev_textlow_not_set);
1509 pst = (struct partial_symtab *) 0;
1511 dependencies_used = 0;
1512 has_line_numbers = 0;
1516 prev_so_symnum = symnum;
1518 /* End the current partial symtab and start a new one */
1520 namestring = set_namestring (objfile, &nlist);
1522 /* Null name means end of .o file. Don't start a new one. */
1523 if (*namestring == '\000')
1526 /* Some compilers (including gcc) emit a pair of initial N_SOs.
1527 The first one is a directory name; the second the file name.
1528 If pst exists, is empty, and has a filename ending in '/',
1529 we assume the previous N_SO was a directory name. */
1531 p = strrchr (namestring, '/');
1532 if (p && *(p + 1) == '\000')
1534 /* Save the directory name SOs locally, then save it into
1535 the psymtab when it's created below. */
1536 dirname_nso = namestring;
1540 /* Some other compilers (C++ ones in particular) emit useless
1541 SOs for non-existant .c files. We ignore all subsequent SOs
1542 that immediately follow the first. */
1546 pst = start_psymtab (objfile,
1548 first_so_symnum * symbol_size,
1549 objfile->global_psymbols.next,
1550 objfile->static_psymbols.next);
1551 pst->dirname = dirname_nso;
1559 enum language tmp_language;
1560 /* Add this bincl to the bincl_list for future EXCLs. No
1561 need to save the string; it'll be around until
1562 read_dbx_symtab function returns */
1564 namestring = set_namestring (objfile, &nlist);
1565 tmp_language = deduce_language_from_filename (namestring);
1567 /* Only change the psymtab's language if we've learned
1568 something useful (eg. tmp_language is not language_unknown).
1569 In addition, to match what start_subfile does, never change
1571 if (tmp_language != language_unknown
1572 && (tmp_language != language_c
1573 || psymtab_language != language_cplus))
1574 psymtab_language = tmp_language;
1578 /* FIXME: we should not get here without a PST to work on.
1579 Attempt to recover. */
1580 complaint (&symfile_complaints,
1581 _("N_BINCL %s not in entries for any file, at symtab \
1583 namestring, symnum);
1586 add_bincl_to_list (pst, namestring, nlist.n_value);
1588 /* Mark down an include file in the current psymtab */
1590 goto record_include_file;
1595 enum language tmp_language;
1596 /* Mark down an include file in the current psymtab */
1598 namestring = set_namestring (objfile, &nlist);
1599 tmp_language = deduce_language_from_filename (namestring);
1601 /* Only change the psymtab's language if we've learned
1602 something useful (eg. tmp_language is not language_unknown).
1603 In addition, to match what start_subfile does, never change
1605 if (tmp_language != language_unknown
1606 && (tmp_language != language_c
1607 || psymtab_language != language_cplus))
1608 psymtab_language = tmp_language;
1610 /* In C++, one may expect the same filename to come round many
1611 times, when code is coming alternately from the main file
1612 and from inline functions in other files. So I check to see
1613 if this is a file we've seen before -- either the main
1614 source file, or a previously included file.
1616 This seems to be a lot of time to be spending on N_SOL, but
1617 things like "break c-exp.y:435" need to work (I
1618 suppose the psymtab_include_list could be hashed or put
1619 in a binary tree, if profiling shows this is a major hog). */
1620 if (pst && strcmp (namestring, pst->filename) == 0)
1624 for (i = 0; i < includes_used; i++)
1625 if (strcmp (namestring, psymtab_include_list[i]) == 0)
1634 record_include_file:
1636 psymtab_include_list[includes_used++] = namestring;
1637 if (includes_used >= includes_allocated)
1639 char **orig = psymtab_include_list;
1641 psymtab_include_list = (char **)
1642 alloca ((includes_allocated *= 2) * sizeof (char *));
1643 memcpy (psymtab_include_list, orig,
1644 includes_used * sizeof (char *));
1648 case N_LSYM: /* Typedef or automatic variable. */
1649 case N_STSYM: /* Data seg var -- static */
1650 case N_LCSYM: /* BSS " */
1651 case N_ROSYM: /* Read-only data seg var -- static. */
1652 case N_NBSTS: /* Gould nobase. */
1653 case N_NBLCS: /* symbols. */
1655 case N_GSYM: /* Global (extern) variable; can be
1656 data or bss (sigh FIXME). */
1658 /* Following may probably be ignored; I'll leave them here
1659 for now (until I do Pascal and Modula 2 extensions). */
1661 case N_PC: /* I may or may not need this; I
1663 case N_M2C: /* I suspect that I can ignore this here. */
1664 case N_SCOPE: /* Same. */
1668 namestring = set_namestring (objfile, &nlist);
1670 /* See if this is an end of function stab. */
1671 if (pst && nlist.n_type == N_FUN && *namestring == '\000')
1675 /* It's value is the size (in bytes) of the function for
1676 function relative stabs, or the address of the function's
1677 end for old style stabs. */
1678 valu = nlist.n_value + last_function_start;
1679 if (pst->texthigh == 0 || valu > pst->texthigh)
1680 pst->texthigh = valu;
1684 p = (char *) strchr (namestring, ':');
1686 continue; /* Not a debugging symbol. */
1689 sym_name = NULL; /* pacify "gcc -Werror" */
1690 if (psymtab_language == language_cplus)
1692 char *new_name, *name = xmalloc (p - namestring + 1);
1693 memcpy (name, namestring, p - namestring);
1694 name[p - namestring] = '\0';
1695 new_name = cp_canonicalize_string (name);
1696 if (new_name != NULL)
1698 sym_len = strlen (new_name);
1699 sym_name = obsavestring (new_name, sym_len,
1700 &objfile->objfile_obstack);
1708 sym_name = namestring;
1709 sym_len = p - namestring;
1712 /* Main processing section for debugging symbols which
1713 the initial read through the symbol tables needs to worry
1714 about. If we reach this point, the symbol which we are
1715 considering is definitely one we are interested in.
1716 p must also contain the (valid) index into the namestring
1717 which indicates the debugging type symbol. */
1722 nlist.n_value += ANOFFSET (objfile->section_offsets,
1725 if (gdbarch_static_transform_name_p (gdbarch))
1726 namestring = gdbarch_static_transform_name (gdbarch,
1729 add_psymbol_to_list (sym_name, sym_len,
1730 VAR_DOMAIN, LOC_STATIC,
1731 &objfile->static_psymbols,
1733 psymtab_language, objfile);
1737 nlist.n_value += ANOFFSET (objfile->section_offsets,
1739 /* The addresses in these entries are reported to be
1740 wrong. See the code that reads 'G's for symtabs. */
1741 add_psymbol_to_list (sym_name, sym_len,
1742 VAR_DOMAIN, LOC_STATIC,
1743 &objfile->global_psymbols,
1745 psymtab_language, objfile);
1749 /* When a 'T' entry is defining an anonymous enum, it
1750 may have a name which is the empty string, or a
1751 single space. Since they're not really defining a
1752 symbol, those shouldn't go in the partial symbol
1753 table. We do pick up the elements of such enums at
1754 'check_enum:', below. */
1755 if (p >= namestring + 2
1756 || (p == namestring + 1
1757 && namestring[0] != ' '))
1759 add_psymbol_to_list (sym_name, sym_len,
1760 STRUCT_DOMAIN, LOC_TYPEDEF,
1761 &objfile->static_psymbols,
1763 psymtab_language, objfile);
1766 /* Also a typedef with the same name. */
1767 add_psymbol_to_list (sym_name, sym_len,
1768 VAR_DOMAIN, LOC_TYPEDEF,
1769 &objfile->static_psymbols,
1771 psymtab_language, objfile);
1778 if (p != namestring) /* a name is there, not just :T... */
1780 add_psymbol_to_list (sym_name, sym_len,
1781 VAR_DOMAIN, LOC_TYPEDEF,
1782 &objfile->static_psymbols,
1784 psymtab_language, objfile);
1787 /* If this is an enumerated type, we need to
1788 add all the enum constants to the partial symbol
1789 table. This does not cover enums without names, e.g.
1790 "enum {a, b} c;" in C, but fortunately those are
1791 rare. There is no way for GDB to find those from the
1792 enum type without spending too much time on it. Thus
1793 to solve this problem, the compiler needs to put out the
1794 enum in a nameless type. GCC2 does this. */
1796 /* We are looking for something of the form
1797 <name> ":" ("t" | "T") [<number> "="] "e"
1798 {<constant> ":" <value> ","} ";". */
1800 /* Skip over the colon and the 't' or 'T'. */
1802 /* This type may be given a number. Also, numbers can come
1803 in pairs like (0,26). Skip over it. */
1804 while ((*p >= '0' && *p <= '9')
1805 || *p == '(' || *p == ',' || *p == ')'
1811 /* The aix4 compiler emits extra crud before the members. */
1814 /* Skip over the type (?). */
1818 /* Skip over the colon. */
1822 /* We have found an enumerated type. */
1823 /* According to comments in read_enum_type
1824 a comma could end it instead of a semicolon.
1825 I don't know where that happens.
1827 while (*p && *p != ';' && *p != ',')
1831 /* Check for and handle cretinous dbx symbol name
1833 if (*p == '\\' || (*p == '?' && p[1] == '\0'))
1834 p = next_symbol_text (objfile);
1836 /* Point to the character after the name
1837 of the enum constant. */
1838 for (q = p; *q && *q != ':'; q++)
1840 /* Note that the value doesn't matter for
1841 enum constants in psymtabs, just in symtabs. */
1842 add_psymbol_to_list (p, q - p,
1843 VAR_DOMAIN, LOC_CONST,
1844 &objfile->static_psymbols, 0,
1845 0, psymtab_language, objfile);
1846 /* Point past the name. */
1848 /* Skip over the value. */
1849 while (*p && *p != ',')
1851 /* Advance past the comma. */
1859 /* Constant, e.g. from "const" in Pascal. */
1860 add_psymbol_to_list (sym_name, sym_len,
1861 VAR_DOMAIN, LOC_CONST,
1862 &objfile->static_psymbols, nlist.n_value,
1863 0, psymtab_language, objfile);
1869 int name_len = p - namestring;
1870 char *name = xmalloc (name_len + 1);
1871 memcpy (name, namestring, name_len);
1872 name[name_len] = '\0';
1873 function_outside_compilation_unit_complaint (name);
1876 nlist.n_value += ANOFFSET (objfile->section_offsets,
1877 SECT_OFF_TEXT (objfile));
1878 /* Kludges for ELF/STABS with Sun ACC */
1879 last_function_name = namestring;
1880 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1881 value for the bottom of the text seg in those cases. */
1882 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1883 SECT_OFF_TEXT (objfile))
1884 && gdbarch_sofun_address_maybe_missing (gdbarch))
1886 CORE_ADDR minsym_valu =
1887 find_stab_function_addr (namestring,
1888 pst ? pst->filename : NULL,
1890 /* find_stab_function_addr will return 0 if the minimal
1891 symbol wasn't found. (Unfortunately, this might also
1892 be a valid address.) Anyway, if it *does* return 0,
1893 it is likely that the value was set correctly to begin
1895 if (minsym_valu != 0)
1896 nlist.n_value = minsym_valu;
1898 if (pst && textlow_not_set
1899 && gdbarch_sofun_address_maybe_missing (gdbarch))
1901 pst->textlow = nlist.n_value;
1902 textlow_not_set = 0;
1906 /* Keep track of the start of the last function so we
1907 can handle end of function symbols. */
1908 last_function_start = nlist.n_value;
1910 /* In reordered executables this function may lie outside
1911 the bounds created by N_SO symbols. If that's the case
1912 use the address of this function as the low bound for
1913 the partial symbol table. */
1916 || (nlist.n_value < pst->textlow
1918 != ANOFFSET (objfile->section_offsets,
1919 SECT_OFF_TEXT (objfile))))))
1921 pst->textlow = nlist.n_value;
1922 textlow_not_set = 0;
1924 add_psymbol_to_list (sym_name, sym_len,
1925 VAR_DOMAIN, LOC_BLOCK,
1926 &objfile->static_psymbols,
1928 psymtab_language, objfile);
1931 /* Global functions were ignored here, but now they
1932 are put into the global psymtab like one would expect.
1933 They're also in the minimal symbol table. */
1937 int name_len = p - namestring;
1938 char *name = xmalloc (name_len + 1);
1939 memcpy (name, namestring, name_len);
1940 name[name_len] = '\0';
1941 function_outside_compilation_unit_complaint (name);
1944 nlist.n_value += ANOFFSET (objfile->section_offsets,
1945 SECT_OFF_TEXT (objfile));
1946 /* Kludges for ELF/STABS with Sun ACC */
1947 last_function_name = namestring;
1948 /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
1949 value for the bottom of the text seg in those cases. */
1950 if (nlist.n_value == ANOFFSET (objfile->section_offsets,
1951 SECT_OFF_TEXT (objfile))
1952 && gdbarch_sofun_address_maybe_missing (gdbarch))
1954 CORE_ADDR minsym_valu =
1955 find_stab_function_addr (namestring,
1956 pst ? pst->filename : NULL,
1958 /* find_stab_function_addr will return 0 if the minimal
1959 symbol wasn't found. (Unfortunately, this might also
1960 be a valid address.) Anyway, if it *does* return 0,
1961 it is likely that the value was set correctly to begin
1963 if (minsym_valu != 0)
1964 nlist.n_value = minsym_valu;
1966 if (pst && textlow_not_set
1967 && gdbarch_sofun_address_maybe_missing (gdbarch))
1969 pst->textlow = nlist.n_value;
1970 textlow_not_set = 0;
1974 /* Keep track of the start of the last function so we
1975 can handle end of function symbols. */
1976 last_function_start = nlist.n_value;
1978 /* In reordered executables this function may lie outside
1979 the bounds created by N_SO symbols. If that's the case
1980 use the address of this function as the low bound for
1981 the partial symbol table. */
1984 || (nlist.n_value < pst->textlow
1986 != ANOFFSET (objfile->section_offsets,
1987 SECT_OFF_TEXT (objfile))))))
1989 pst->textlow = nlist.n_value;
1990 textlow_not_set = 0;
1992 add_psymbol_to_list (sym_name, sym_len,
1993 VAR_DOMAIN, LOC_BLOCK,
1994 &objfile->global_psymbols,
1996 psymtab_language, objfile);
1999 /* Two things show up here (hopefully); static symbols of
2000 local scope (static used inside braces) or extensions
2001 of structure symbols. We can ignore both. */
2015 case '#': /* for symbol identification (used in live ranges) */
2019 /* It is a C++ nested symbol. We don't need to record it
2020 (I don't think); if we try to look up foo::bar::baz,
2021 then symbols for the symtab containing foo should get
2022 read in, I think. */
2023 /* Someone says sun cc puts out symbols like
2024 /foo/baz/maclib::/usr/local/bin/maclib,
2025 which would get here with a symbol type of ':'. */
2029 /* Unexpected symbol descriptor. The second and subsequent stabs
2030 of a continued stab can show up here. The question is
2031 whether they ever can mimic a normal stab--it would be
2032 nice if not, since we certainly don't want to spend the
2033 time searching to the end of every string looking for
2036 complaint (&symfile_complaints, _("unknown symbol descriptor `%c'"),
2039 /* Ignore it; perhaps it is an extension that we don't
2047 namestring = set_namestring (objfile, &nlist);
2049 /* Find the corresponding bincl and mark that psymtab on the
2050 psymtab dependency list */
2052 struct partial_symtab *needed_pst =
2053 find_corresponding_bincl_psymtab (namestring, nlist.n_value);
2055 /* If this include file was defined earlier in this file,
2057 if (needed_pst == pst)
2065 for (i = 0; i < dependencies_used; i++)
2066 if (dependency_list[i] == needed_pst)
2072 /* If it's already in the list, skip the rest. */
2076 dependency_list[dependencies_used++] = needed_pst;
2077 if (dependencies_used >= dependencies_allocated)
2079 struct partial_symtab **orig = dependency_list;
2081 (struct partial_symtab **)
2082 alloca ((dependencies_allocated *= 2)
2083 * sizeof (struct partial_symtab *));
2084 memcpy (dependency_list, orig,
2086 * sizeof (struct partial_symtab *)));
2088 fprintf_unfiltered (gdb_stderr,
2089 "Had to reallocate dependency list.\n");
2090 fprintf_unfiltered (gdb_stderr,
2091 "New dependencies allocated: %d\n",
2092 dependencies_allocated);
2100 /* Solaris 2 end of module, finish current partial symbol table.
2101 end_psymtab will set pst->texthigh to the proper value, which
2102 is necessary if a module compiled without debugging info
2103 follows this module. */
2104 if (pst && gdbarch_sofun_address_maybe_missing (gdbarch))
2106 end_psymtab (pst, psymtab_include_list, includes_used,
2107 symnum * symbol_size,
2109 dependency_list, dependencies_used, textlow_not_set);
2110 pst = (struct partial_symtab *) 0;
2112 dependencies_used = 0;
2113 has_line_numbers = 0;
2119 HANDLE_RBRAC (nlist.n_value);
2125 case N_SSYM: /* Claim: Structure or union element.
2126 Hopefully, I can ignore this. */
2127 case N_ENTRY: /* Alternate entry point; can ignore. */
2128 case N_MAIN: /* Can definitely ignore this. */
2129 case N_CATCH: /* These are GNU C++ extensions */
2130 case N_EHDECL: /* that can safely be ignored here. */
2140 case N_NSYMS: /* Ultrix 4.0: symbol count */
2141 case N_DEFD: /* GNU Modula-2 */
2142 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
2144 case N_OBJ: /* useless types from Solaris */
2147 /* These symbols aren't interesting; don't worry about them */
2152 /* If we haven't found it yet, ignore it. It's probably some
2153 new type we don't know about yet. */
2154 unknown_symtype_complaint (hex_string (nlist.n_type));
2159 /* If there's stuff to be cleaned up, clean it up. */
2162 /* Don't set pst->texthigh lower than it already is. */
2163 CORE_ADDR text_end =
2164 (lowest_text_address == (CORE_ADDR) -1
2165 ? (text_addr + ANOFFSET (objfile->section_offsets,
2166 SECT_OFF_TEXT (objfile)))
2167 : lowest_text_address)
2170 end_psymtab (pst, psymtab_include_list, includes_used,
2171 symnum * symbol_size,
2172 text_end > pst->texthigh ? text_end : pst->texthigh,
2173 dependency_list, dependencies_used, textlow_not_set);
2176 do_cleanups (back_to);
2179 /* Allocate and partially fill a partial symtab. It will be
2180 completely filled at the end of the symbol list.
2182 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2183 is the address relative to which its symbols are (incremental) or 0
2186 static struct partial_symtab *
2187 start_psymtab (struct objfile *objfile, char *filename, CORE_ADDR textlow,
2188 int ldsymoff, struct partial_symbol **global_syms,
2189 struct partial_symbol **static_syms)
2191 struct partial_symtab *result =
2192 start_psymtab_common (objfile, objfile->section_offsets,
2193 filename, textlow, global_syms, static_syms);
2195 result->read_symtab_private = (char *)
2196 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symloc));
2197 LDSYMOFF (result) = ldsymoff;
2198 result->read_symtab = dbx_psymtab_to_symtab;
2199 SYMBOL_SIZE (result) = symbol_size;
2200 SYMBOL_OFFSET (result) = symbol_table_offset;
2201 STRING_OFFSET (result) = string_table_offset;
2202 FILE_STRING_OFFSET (result) = file_string_table_offset;
2205 /* If we're handling an ELF file, drag some section-relocation info
2206 for this source file out of the ELF symbol table, to compensate for
2207 Sun brain death. This replaces the section_offsets in this psymtab,
2209 elfstab_offset_sections (objfile, result);
2212 /* Deduce the source language from the filename for this psymtab. */
2213 psymtab_language = deduce_language_from_filename (filename);
2218 /* Close off the current usage of PST.
2219 Returns PST or NULL if the partial symtab was empty and thrown away.
2221 FIXME: List variables and peculiarities of same. */
2223 struct partial_symtab *
2224 end_psymtab (struct partial_symtab *pst, char **include_list, int num_includes,
2225 int capping_symbol_offset, CORE_ADDR capping_text,
2226 struct partial_symtab **dependency_list, int number_dependencies,
2227 int textlow_not_set)
2230 struct objfile *objfile = pst->objfile;
2231 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2233 if (capping_symbol_offset != -1)
2234 LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
2235 pst->texthigh = capping_text;
2237 /* Under Solaris, the N_SO symbols always have a value of 0,
2238 instead of the usual address of the .o file. Therefore,
2239 we have to do some tricks to fill in texthigh and textlow.
2240 The first trick is: if we see a static
2241 or global function, and the textlow for the current pst
2242 is not set (ie: textlow_not_set), then we use that function's
2243 address for the textlow of the pst. */
2245 /* Now, to fill in texthigh, we remember the last function seen
2246 in the .o file. Also, there's a hack in
2247 bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
2248 to here via the misc_info field. Therefore, we can fill in
2249 a reliable texthigh by taking the address plus size of the
2250 last function in the file. */
2252 if (pst->texthigh == 0 && last_function_name
2253 && gdbarch_sofun_address_maybe_missing (gdbarch))
2257 struct minimal_symbol *minsym;
2259 p = strchr (last_function_name, ':');
2261 p = last_function_name;
2262 n = p - last_function_name;
2264 strncpy (p, last_function_name, n);
2267 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2270 /* Sun Fortran appends an underscore to the minimal symbol name,
2271 try again with an appended underscore if the minimal symbol
2275 minsym = lookup_minimal_symbol (p, pst->filename, objfile);
2279 pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
2281 last_function_name = NULL;
2284 if (!gdbarch_sofun_address_maybe_missing (gdbarch))
2286 /* this test will be true if the last .o file is only data */
2287 else if (textlow_not_set)
2288 pst->textlow = pst->texthigh;
2291 struct partial_symtab *p1;
2293 /* If we know our own starting text address, then walk through all other
2294 psymtabs for this objfile, and if any didn't know their ending text
2295 address, set it to our starting address. Take care to not set our
2296 own ending address to our starting address, nor to set addresses on
2297 `dependency' files that have both textlow and texthigh zero. */
2299 ALL_OBJFILE_PSYMTABS (objfile, p1)
2301 if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
2303 p1->texthigh = pst->textlow;
2304 /* if this file has only data, then make textlow match texthigh */
2305 if (p1->textlow == 0)
2306 p1->textlow = p1->texthigh;
2311 /* End of kludge for patching Solaris textlow and texthigh. */
2313 pst->n_global_syms =
2314 objfile->global_psymbols.next - (objfile->global_psymbols.list
2315 + pst->globals_offset);
2316 pst->n_static_syms =
2317 objfile->static_psymbols.next - (objfile->static_psymbols.list
2318 + pst->statics_offset);
2320 pst->number_of_dependencies = number_dependencies;
2321 if (number_dependencies)
2323 pst->dependencies = (struct partial_symtab **)
2324 obstack_alloc (&objfile->objfile_obstack,
2325 number_dependencies * sizeof (struct partial_symtab *));
2326 memcpy (pst->dependencies, dependency_list,
2327 number_dependencies * sizeof (struct partial_symtab *));
2330 pst->dependencies = 0;
2332 for (i = 0; i < num_includes; i++)
2334 struct partial_symtab *subpst =
2335 allocate_psymtab (include_list[i], objfile);
2337 /* Copy the sesction_offsets array from the main psymtab. */
2338 subpst->section_offsets = pst->section_offsets;
2339 subpst->read_symtab_private =
2340 (char *) obstack_alloc (&objfile->objfile_obstack,
2341 sizeof (struct symloc));
2345 subpst->texthigh = 0;
2347 /* We could save slight bits of space by only making one of these,
2348 shared by the entire set of include files. FIXME-someday. */
2349 subpst->dependencies = (struct partial_symtab **)
2350 obstack_alloc (&objfile->objfile_obstack,
2351 sizeof (struct partial_symtab *));
2352 subpst->dependencies[0] = pst;
2353 subpst->number_of_dependencies = 1;
2355 subpst->globals_offset =
2356 subpst->n_global_syms =
2357 subpst->statics_offset =
2358 subpst->n_static_syms = 0;
2362 subpst->read_symtab = pst->read_symtab;
2365 sort_pst_symbols (pst);
2367 /* If there is already a psymtab or symtab for a file of this name, remove it.
2368 (If there is a symtab, more drastic things also happen.)
2369 This happens in VxWorks. */
2370 free_named_symtabs (pst->filename);
2372 if (num_includes == 0
2373 && number_dependencies == 0
2374 && pst->n_global_syms == 0
2375 && pst->n_static_syms == 0
2376 && has_line_numbers == 0)
2378 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2379 it is on the obstack, but we can forget to chain it on the list. */
2380 /* Empty psymtabs happen as a result of header files which don't have
2381 any symbols in them. There can be a lot of them. But this check
2382 is wrong, in that a psymtab with N_SLINE entries but nothing else
2383 is not empty, but we don't realize that. Fixing that without slowing
2384 things down might be tricky. */
2386 discard_psymtab (pst);
2388 /* Indicate that psymtab was thrown away. */
2389 pst = (struct partial_symtab *) NULL;
2395 dbx_psymtab_to_symtab_1 (struct partial_symtab *pst)
2397 struct cleanup *old_chain;
2405 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. \
2406 Shouldn't happen.\n",
2411 /* Read in all partial symtabs on which this one is dependent */
2412 for (i = 0; i < pst->number_of_dependencies; i++)
2413 if (!pst->dependencies[i]->readin)
2415 /* Inform about additional files that need to be read in. */
2418 fputs_filtered (" ", gdb_stdout);
2420 fputs_filtered ("and ", gdb_stdout);
2422 printf_filtered ("%s...", pst->dependencies[i]->filename);
2423 wrap_here (""); /* Flush output */
2424 gdb_flush (gdb_stdout);
2426 dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
2429 if (LDSYMLEN (pst)) /* Otherwise it's a dummy */
2431 /* Init stuff necessary for reading in symbols */
2434 old_chain = make_cleanup (really_free_pendings, 0);
2435 file_string_table_offset = FILE_STRING_OFFSET (pst);
2436 symbol_size = SYMBOL_SIZE (pst);
2438 /* Read in this file's symbols */
2439 bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
2440 read_ofile_symtab (pst);
2442 do_cleanups (old_chain);
2448 /* Read in all of the symbols for a given psymtab for real.
2449 Be verbose about it if the user wants that. */
2452 dbx_psymtab_to_symtab (struct partial_symtab *pst)
2455 struct cleanup *back_to = NULL;
2462 fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. \
2463 Shouldn't happen.\n",
2468 if (LDSYMLEN (pst) || pst->number_of_dependencies)
2470 /* Print the message now, before reading the string table,
2471 to avoid disconcerting pauses. */
2474 printf_filtered ("Reading in symbols for %s...", pst->filename);
2475 gdb_flush (gdb_stdout);
2478 sym_bfd = pst->objfile->obfd;
2480 next_symbol_text_func = dbx_next_symbol_text;
2482 if (DBX_STAB_SECTION (pst->objfile))
2485 = symfile_relocate_debug_section (pst->objfile->obfd,
2486 DBX_STAB_SECTION (pst->objfile),
2489 back_to = make_cleanup (free_current_contents,
2490 (void *) &stabs_data);
2493 dbx_psymtab_to_symtab_1 (pst);
2496 do_cleanups (back_to);
2498 /* Match with global symbols. This only needs to be done once,
2499 after all of the symtabs and dependencies have been read in. */
2500 scan_file_globals (pst->objfile);
2502 /* Finish up the debug error message. */
2504 printf_filtered ("done.\n");
2508 /* Read in a defined section of a specific object file's symbols. */
2511 read_ofile_symtab (struct partial_symtab *pst)
2514 struct external_nlist *bufp;
2515 struct internal_nlist nlist;
2517 unsigned max_symnum;
2519 struct objfile *objfile;
2520 int sym_offset; /* Offset to start of symbols to read */
2521 int sym_size; /* Size of symbols to read */
2522 CORE_ADDR text_offset; /* Start of text segment for symbols */
2523 int text_size; /* Size of text segment for symbols */
2524 struct section_offsets *section_offsets;
2526 objfile = pst->objfile;
2527 sym_offset = LDSYMOFF (pst);
2528 sym_size = LDSYMLEN (pst);
2529 text_offset = pst->textlow;
2530 text_size = pst->texthigh - pst->textlow;
2531 /* This cannot be simply objfile->section_offsets because of
2532 elfstab_offset_sections() which initializes the psymtab section
2533 offsets information in a special way, and that is different from
2534 objfile->section_offsets. */
2535 section_offsets = pst->section_offsets;
2537 current_objfile = objfile;
2538 subfile_stack = NULL;
2540 stringtab_global = DBX_STRINGTAB (objfile);
2541 last_source_file = NULL;
2543 abfd = objfile->obfd;
2544 symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
2545 symbuf_end = symbuf_idx = 0;
2547 symbuf_left = sym_offset + sym_size;
2549 /* It is necessary to actually read one symbol *before* the start
2550 of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
2551 occurs before the N_SO symbol.
2553 Detecting this in read_dbx_symtab
2554 would slow down initial readin, so we look for it here instead. */
2555 if (!processing_acc_compilation && sym_offset >= (int) symbol_size)
2557 stabs_seek (sym_offset - symbol_size);
2559 bufp = &symbuf[symbuf_idx++];
2560 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2561 OBJSTAT (objfile, n_stabs++);
2563 namestring = set_namestring (objfile, &nlist);
2565 processing_gcc_compilation = 0;
2566 if (nlist.n_type == N_TEXT)
2568 const char *tempstring = namestring;
2570 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2571 processing_gcc_compilation = 1;
2572 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2573 processing_gcc_compilation = 2;
2574 if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
2576 if (strncmp (tempstring, "__gnu_compiled", 14) == 0)
2577 processing_gcc_compilation = 2;
2580 /* Try to select a C++ demangling based on the compilation unit
2584 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2585 know whether it will use the old style or v3 mangling. */
2586 if (processing_gcc_compilation)
2588 if (AUTO_DEMANGLING)
2590 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2597 /* The N_SO starting this symtab is the first symbol, so we
2598 better not check the symbol before it. I'm not this can
2599 happen, but it doesn't hurt to check for it. */
2600 stabs_seek (sym_offset);
2601 processing_gcc_compilation = 0;
2604 if (symbuf_idx == symbuf_end)
2606 bufp = &symbuf[symbuf_idx];
2607 if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
2608 error (_("First symbol in segment of executable not a source symbol"));
2610 max_symnum = sym_size / symbol_size;
2613 symnum < max_symnum;
2616 QUIT; /* Allow this to be interruptable */
2617 if (symbuf_idx == symbuf_end)
2619 bufp = &symbuf[symbuf_idx++];
2620 INTERNALIZE_SYMBOL (nlist, bufp, abfd);
2621 OBJSTAT (objfile, n_stabs++);
2623 type = bfd_h_get_8 (abfd, bufp->e_type);
2625 namestring = set_namestring (objfile, &nlist);
2629 if (sizeof (nlist.n_value) > 4
2630 /* We are a 64-bit debugger debugging a 32-bit program. */
2631 && (type == N_LSYM || type == N_PSYM))
2632 /* We have to be careful with the n_value in the case of N_LSYM
2633 and N_PSYM entries, because they are signed offsets from frame
2634 pointer, but we actually read them as unsigned 32-bit values.
2635 This is not a problem for 32-bit debuggers, for which negative
2636 values end up being interpreted correctly (as negative
2637 offsets) due to integer overflow.
2638 But we need to sign-extend the value for 64-bit debuggers,
2639 or we'll end up interpreting negative values as very large
2640 positive offsets. */
2641 nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000;
2642 process_one_symbol (type, nlist.n_desc, nlist.n_value,
2643 namestring, section_offsets, objfile);
2645 /* We skip checking for a new .o or -l file; that should never
2646 happen in this routine. */
2647 else if (type == N_TEXT)
2649 /* I don't think this code will ever be executed, because
2650 the GCC_COMPILED_FLAG_SYMBOL usually is right before
2651 the N_SO symbol which starts this source file.
2652 However, there is no reason not to accept
2653 the GCC_COMPILED_FLAG_SYMBOL anywhere. */
2655 if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
2656 processing_gcc_compilation = 1;
2657 else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
2658 processing_gcc_compilation = 2;
2661 /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
2662 know whether it will use the old style or v3 mangling. */
2663 if (AUTO_DEMANGLING)
2665 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
2669 else if (type & N_EXT || type == (unsigned char) N_TEXT
2670 || type == (unsigned char) N_NBTEXT
2673 /* Global symbol: see if we came across a dbx defintion for
2674 a corresponding symbol. If so, store the value. Remove
2675 syms from the chain when their values are stored, but
2676 search the whole chain, as there may be several syms from
2677 different files with the same name. */
2678 /* This is probably not true. Since the files will be read
2679 in one at a time, each reference to a global symbol will
2680 be satisfied in each file as it appears. So we skip this
2686 /* In a Solaris elf file, this variable, which comes from the
2687 value of the N_SO symbol, will still be 0. Luckily, text_offset,
2688 which comes from pst->textlow is correct. */
2689 if (last_source_start_addr == 0)
2690 last_source_start_addr = text_offset;
2692 /* In reordered executables last_source_start_addr may not be the
2693 lower bound for this symtab, instead use text_offset which comes
2694 from pst->textlow which is correct. */
2695 if (last_source_start_addr > text_offset)
2696 last_source_start_addr = text_offset;
2698 pst->symtab = end_symtab (text_offset + text_size, objfile,
2699 SECT_OFF_TEXT (objfile));
2703 current_objfile = NULL;
2707 /* This handles a single symbol from the symbol-file, building symbols
2708 into a GDB symtab. It takes these arguments and an implicit argument.
2710 TYPE is the type field of the ".stab" symbol entry.
2711 DESC is the desc field of the ".stab" entry.
2712 VALU is the value field of the ".stab" entry.
2713 NAME is the symbol name, in our address space.
2714 SECTION_OFFSETS is a set of amounts by which the sections of this
2715 object file were relocated when it was loaded into memory. Note
2716 that these section_offsets are not the objfile->section_offsets but
2717 the pst->section_offsets. All symbols that refer to memory
2718 locations need to be offset by these amounts.
2719 OBJFILE is the object file from which we are reading symbols. It
2720 is used in end_symtab. */
2723 process_one_symbol (int type, int desc, CORE_ADDR valu, char *name,
2724 struct section_offsets *section_offsets,
2725 struct objfile *objfile)
2727 struct gdbarch *gdbarch = get_objfile_arch (objfile);
2728 struct context_stack *new;
2729 /* This remembers the address of the start of a function. It is
2730 used because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries
2731 are relative to the current function's start address. On systems
2732 other than Solaris 2, this just holds the SECT_OFF_TEXT value,
2733 and is used to relocate these symbol types rather than
2735 static CORE_ADDR function_start_offset;
2737 /* This holds the address of the start of a function, without the
2738 system peculiarities of function_start_offset. */
2739 static CORE_ADDR last_function_start;
2741 /* If this is nonzero, we've seen an N_SLINE since the start of the
2742 current function. We use this to tell us to move the first sline
2743 to the beginning of the function regardless of what its given
2745 static int sline_found_in_function = 1;
2747 /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this
2748 source file. Used to detect the SunPRO solaris compiler. */
2749 static int n_opt_found;
2751 /* The stab type used for the definition of the last function.
2752 N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
2753 static int function_stab_type = 0;
2755 if (!block_address_function_relative)
2757 /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
2758 function start address, so just use the text offset. */
2759 function_start_offset =
2760 ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2763 /* Something is wrong if we see real data before seeing a source
2766 if (last_source_file == NULL && type != (unsigned char) N_SO)
2768 /* Ignore any symbols which appear before an N_SO symbol.
2769 Currently no one puts symbols there, but we should deal
2770 gracefully with the case. A complain()t might be in order,
2771 but this should not be an error (). */
2780 if (*name == '\000')
2782 /* This N_FUN marks the end of a function. This closes off
2783 the current block. */
2784 struct block *block;
2786 if (context_stack_depth <= 0)
2788 lbrac_mismatch_complaint (symnum);
2792 /* The following check is added before recording line 0 at
2793 end of function so as to handle hand-generated stabs
2794 which may have an N_FUN stabs at the end of the function,
2795 but no N_SLINE stabs. */
2796 if (sline_found_in_function)
2798 CORE_ADDR addr = last_function_start + valu;
2799 record_line (current_subfile, 0,
2800 gdbarch_addr_bits_remove (gdbarch, addr));
2803 within_function = 0;
2804 new = pop_context ();
2806 /* Make a block for the local symbols within. */
2807 block = finish_block (new->name, &local_symbols, new->old_blocks,
2808 new->start_addr, new->start_addr + valu,
2811 /* For C++, set the block's scope. */
2812 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
2813 cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
2816 /* May be switching to an assembler file which may not be using
2817 block relative stabs, so reset the offset. */
2818 if (block_address_function_relative)
2819 function_start_offset = 0;
2824 sline_found_in_function = 0;
2826 /* Relocate for dynamic loading. */
2827 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2828 valu = gdbarch_smash_text_address (gdbarch, valu);
2829 last_function_start = valu;
2831 goto define_a_symbol;
2834 /* This "symbol" just indicates the start of an inner lexical
2835 context within a function. */
2837 /* Ignore extra outermost context from SunPRO cc and acc. */
2838 if (n_opt_found && desc == 1)
2841 if (block_address_function_relative)
2842 /* Relocate for Sun ELF acc fn-relative syms. */
2843 valu += function_start_offset;
2845 /* On most machines, the block addresses are relative to the
2846 N_SO, the linker did not relocate them (sigh). */
2847 valu += last_source_start_addr;
2849 new = push_context (desc, valu);
2853 /* This "symbol" just indicates the end of an inner lexical
2854 context that was started with N_LBRAC. */
2856 /* Ignore extra outermost context from SunPRO cc and acc. */
2857 if (n_opt_found && desc == 1)
2860 if (block_address_function_relative)
2861 /* Relocate for Sun ELF acc fn-relative syms. */
2862 valu += function_start_offset;
2864 /* On most machines, the block addresses are relative to the
2865 N_SO, the linker did not relocate them (sigh). */
2866 valu += last_source_start_addr;
2868 if (context_stack_depth <= 0)
2870 lbrac_mismatch_complaint (symnum);
2874 new = pop_context ();
2875 if (desc != new->depth)
2876 lbrac_mismatch_complaint (symnum);
2878 if (local_symbols != NULL)
2880 /* GCC development snapshots from March to December of
2881 2000 would output N_LSYM entries after N_LBRAC
2882 entries. As a consequence, these symbols are simply
2883 discarded. Complain if this is the case. */
2884 complaint (&symfile_complaints, _("\
2885 misplaced N_LBRAC entry; discarding local symbols which have \
2886 no enclosing block"));
2888 local_symbols = new->locals;
2890 if (context_stack_depth > 1)
2892 /* This is not the outermost LBRAC...RBRAC pair in the
2893 function, its local symbols preceded it, and are the ones
2894 just recovered from the context stack. Define the block
2895 for them (but don't bother if the block contains no
2896 symbols. Should we complain on blocks without symbols?
2897 I can't think of any useful purpose for them). */
2898 if (local_symbols != NULL)
2900 /* Muzzle a compiler bug that makes end < start.
2902 ??? Which compilers? Is this ever harmful?. */
2903 if (new->start_addr > valu)
2905 complaint (&symfile_complaints,
2906 _("block start larger than block end"));
2907 new->start_addr = valu;
2909 /* Make a block for the local symbols within. */
2910 finish_block (0, &local_symbols, new->old_blocks,
2911 new->start_addr, valu, objfile);
2916 /* This is the outermost LBRAC...RBRAC pair. There is no
2917 need to do anything; leave the symbols that preceded it
2918 to be attached to the function's own block. We need to
2919 indicate that we just moved outside of the function. */
2920 within_function = 0;
2927 /* This kind of symbol indicates the start of an object file.
2928 Relocate for dynamic loading. */
2929 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2933 /* This type of symbol indicates the start of data for one
2934 source file. Finish the symbol table of the previous source
2935 file (if any) and start accumulating a new symbol table.
2936 Relocate for dynamic loading. */
2937 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2941 if (last_source_file)
2943 /* Check if previous symbol was also an N_SO (with some
2944 sanity checks). If so, that one was actually the
2945 directory name, and the current one is the real file
2946 name. Patch things up. */
2947 if (previous_stab_code == (unsigned char) N_SO)
2949 patch_subfile_names (current_subfile, name);
2950 break; /* Ignore repeated SOs */
2952 end_symtab (valu, objfile, SECT_OFF_TEXT (objfile));
2956 /* Null name means this just marks the end of text for this .o
2957 file. Don't start a new symtab in this case. */
2958 if (*name == '\000')
2961 if (block_address_function_relative)
2962 function_start_offset = 0;
2965 start_symtab (name, NULL, valu);
2966 record_debugformat ("stabs");
2970 /* This type of symbol indicates the start of data for a
2971 sub-source-file, one whose contents were copied or included
2972 in the compilation of the main source file (whose name was
2973 given in the N_SO symbol). Relocate for dynamic loading. */
2974 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
2975 start_subfile (name, current_subfile->dirname);
2980 add_new_header_file (name, valu);
2981 start_subfile (name, current_subfile->dirname);
2985 start_subfile (pop_subfile (), current_subfile->dirname);
2989 add_old_header_file (name, valu);
2993 /* This type of "symbol" really just records one line-number --
2994 core-address correspondence. Enter it in the line list for
2995 this symbol table. */
2997 /* Relocate for dynamic loading and for ELF acc
2998 function-relative symbols. */
2999 valu += function_start_offset;
3001 /* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
3002 middle of the prologue instead of right at the start of the
3003 function. To deal with this we record the address for the
3004 first N_SLINE stab to be the start of the function instead of
3005 the listed location. We really shouldn't to this. When
3006 compiling with optimization, this first N_SLINE stab might be
3007 optimized away. Other (non-GCC) compilers don't emit this
3008 stab at all. There is no real harm in having an extra
3009 numbered line, although it can be a bit annoying for the
3010 user. However, it totally screws up our testsuite.
3012 So for now, keep adjusting the address of the first N_SLINE
3013 stab, but only for code compiled with GCC. */
3015 if (within_function && sline_found_in_function == 0)
3017 CORE_ADDR addr = processing_gcc_compilation == 2 ?
3018 last_function_start : valu;
3019 record_line (current_subfile, desc,
3020 gdbarch_addr_bits_remove (gdbarch, addr));
3021 sline_found_in_function = 1;
3024 record_line (current_subfile, desc,
3025 gdbarch_addr_bits_remove (gdbarch, valu));
3029 common_block_start (name, objfile);
3033 common_block_end (objfile);
3036 /* The following symbol types need to have the appropriate
3037 offset added to their value; then we process symbol
3038 definitions in the name. */
3040 case N_STSYM: /* Static symbol in data segment. */
3041 case N_LCSYM: /* Static symbol in BSS segment. */
3042 case N_ROSYM: /* Static symbol in read-only data segment. */
3043 /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
3044 Solaris 2's stabs-in-elf makes *most* symbols relative but
3045 leaves a few absolute (at least for Solaris 2.1 and version
3046 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on
3047 the fence. .stab "foo:S...",N_STSYM is absolute (ld
3048 relocates it) .stab "foo:V...",N_STSYM is relative (section
3049 base subtracted). This leaves us no choice but to search for
3050 the 'S' or 'V'... (or pass the whole section_offsets stuff
3051 down ONE MORE function call level, which we really don't want
3056 /* Normal object file and NLMs have non-zero text seg offsets,
3057 but don't need their static syms offset in this fashion.
3058 XXX - This is really a crock that should be fixed in the
3059 solib handling code so that I don't have to work around it
3062 if (!symfile_relocatable)
3064 p = strchr (name, ':');
3065 if (p != 0 && p[1] == 'S')
3067 /* The linker relocated it. We don't want to add an
3068 elfstab_offset_sections-type offset, but we *do*
3069 want to add whatever solib.c passed to
3070 symbol_file_add as addr (this is known to affect
3071 SunOS 4, and I suspect ELF too). Since
3072 elfstab_offset_sections currently does not muck
3073 with the text offset (there is no Ttext.text
3074 symbol), we can get addr from the text offset. If
3075 elfstab_offset_sections ever starts dealing with
3076 the text offset, and we still need to do this, we
3077 need to invent a SECT_OFF_ADDR_KLUDGE or something. */
3078 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3079 goto define_a_symbol;
3082 /* Since it's not the kludge case, re-dispatch to the right
3093 internal_error (__FILE__, __LINE__,
3094 _("failed internal consistency check"));
3098 case_N_STSYM: /* Static symbol in data segment. */
3099 case N_DSLINE: /* Source line number, data segment. */
3100 valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
3101 goto define_a_symbol;
3103 case_N_LCSYM: /* Static symbol in BSS segment. */
3104 case N_BSLINE: /* Source line number, BSS segment. */
3105 /* N_BROWS: overlaps with N_BSLINE. */
3106 valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
3107 goto define_a_symbol;
3109 case_N_ROSYM: /* Static symbol in read-only data segment. */
3110 valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
3111 goto define_a_symbol;
3113 case N_ENTRY: /* Alternate entry point. */
3114 /* Relocate for dynamic loading. */
3115 valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
3116 goto define_a_symbol;
3118 /* The following symbol types we don't know how to process.
3119 Handle them in a "default" way, but complain to people who
3122 case N_CATCH: /* Exception handler catcher. */
3123 case N_EHDECL: /* Exception handler name. */
3124 case N_PC: /* Global symbol in Pascal. */
3125 case N_M2C: /* Modula-2 compilation unit. */
3126 /* N_MOD2: overlaps with N_EHDECL. */
3127 case N_SCOPE: /* Modula-2 scope information. */
3128 case N_ECOML: /* End common (local name). */
3129 case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
3134 unknown_symtype_complaint (hex_string (type));
3137 /* The following symbol types don't need the address field
3138 relocated, since it is either unused, or is absolute. */
3140 case N_GSYM: /* Global variable. */
3141 case N_NSYMS: /* Number of symbols (Ultrix). */
3142 case N_NOMAP: /* No map? (Ultrix). */
3143 case N_RSYM: /* Register variable. */
3144 case N_DEFD: /* Modula-2 GNU module dependency. */
3145 case N_SSYM: /* Struct or union element. */
3146 case N_LSYM: /* Local symbol in stack. */
3147 case N_PSYM: /* Parameter variable. */
3148 case N_LENG: /* Length of preceding symbol type. */
3152 char *colon_pos = strchr (name, ':');
3153 if (colon_pos == NULL)
3156 deftype = colon_pos[1];
3162 function_stab_type = type;
3164 /* Deal with the SunPRO 3.0 compiler which omits the
3165 address from N_FUN symbols. */
3167 && valu == ANOFFSET (section_offsets,
3168 SECT_OFF_TEXT (objfile))
3169 && gdbarch_sofun_address_maybe_missing (gdbarch))
3171 CORE_ADDR minsym_valu =
3172 find_stab_function_addr (name, last_source_file, objfile);
3174 /* The function find_stab_function_addr will return
3175 0 if the minimal symbol wasn't found.
3176 (Unfortunately, this might also be a valid
3177 address.) Anyway, if it *does* return 0, it is
3178 likely that the value was set correctly to begin
3180 if (minsym_valu != 0)
3184 if (block_address_function_relative)
3185 /* For Solaris 2 compilers, the block addresses and
3186 N_SLINE's are relative to the start of the
3187 function. On normal systems, and when using GCC on
3188 Solaris 2, these addresses are just absolute, or
3189 relative to the N_SO, depending on
3190 BLOCK_ADDRESS_ABSOLUTE. */
3191 function_start_offset = valu;
3193 within_function = 1;
3195 if (context_stack_depth > 1)
3197 complaint (&symfile_complaints,
3198 _("unmatched N_LBRAC before symtab pos %d"),
3203 if (context_stack_depth > 0)
3205 struct block *block;
3207 new = pop_context ();
3208 /* Make a block for the local symbols within. */
3209 block = finish_block (new->name, &local_symbols,
3210 new->old_blocks, new->start_addr,
3213 /* For C++, set the block's scope. */
3214 if (SYMBOL_LANGUAGE (new->name) == language_cplus)
3215 cp_set_block_scope (new->name, block,
3216 &objfile->objfile_obstack,
3220 new = push_context (0, valu);
3221 new->name = define_symbol (valu, name, desc, type, objfile);
3225 define_symbol (valu, name, desc, type, objfile);
3231 /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
3232 for a bunch of other flags, too. Someday we may parse their
3233 flags; for now we ignore theirs and hope they'll ignore ours. */
3234 case N_OPT: /* Solaris 2: Compiler options. */
3237 if (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)
3239 processing_gcc_compilation = 2;
3240 #if 0 /* Works, but is experimental. -fnf */
3241 /* For now, stay with AUTO_DEMANGLING for g++ output, as
3242 we don't know whether it will use the old style or v3
3244 if (AUTO_DEMANGLING)
3246 set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
3255 case N_MAIN: /* Name of main routine. */
3256 /* FIXME: If one has a symbol file with N_MAIN and then replaces
3257 it with a symbol file with "main" and without N_MAIN. I'm
3258 not sure exactly what rule to follow but probably something
3259 like: N_MAIN takes precedence over "main" no matter what
3260 objfile it is in; If there is more than one N_MAIN, choose
3261 the one in the symfile_objfile; If there is more than one
3262 N_MAIN within a given objfile, complain() and choose
3263 arbitrarily. (kingdon) */
3265 set_main_name (name);
3268 /* The following symbol types can be ignored. */
3269 case N_OBJ: /* Solaris 2: Object file dir and name. */
3270 case N_PATCH: /* Solaris 2: Patch Run Time Checker. */
3271 /* N_UNDF: Solaris 2: File separator mark. */
3272 /* N_UNDF: -- we will never encounter it, since we only process
3273 one file's symbols at once. */
3274 case N_ENDM: /* Solaris 2: End of module. */
3275 case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
3279 /* '#' is a GNU C extension to allow one symbol to refer to another
3282 Generally this is used so that an alias can refer to its main
3286 /* Initialize symbol reference names and determine if this is a
3287 definition. If a symbol reference is being defined, go ahead
3288 and add it. Otherwise, just return. */
3293 /* If this stab defines a new reference ID that is not on the
3294 reference list, then put it on the reference list.
3296 We go ahead and advance NAME past the reference, even though
3297 it is not strictly necessary at this time. */
3298 refnum = symbol_reference_defined (&s);
3300 if (!ref_search (refnum))
3301 ref_add (refnum, 0, name, valu);
3305 previous_stab_code = type;
3308 /* FIXME: The only difference between this and elfstab_build_psymtabs
3309 is the call to install_minimal_symbols for elf, and the support for
3310 split sections. If the differences are really that small, the code
3311 should be shared. */
3313 /* Scan and build partial symbols for an coff symbol file.
3314 The coff file has already been processed to get its minimal symbols.
3316 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3319 OBJFILE is the object file we are reading symbols from.
3320 ADDR is the address relative to which the symbols are (e.g.
3321 the base address of the text segment).
3322 MAINLINE is true if we are reading the main symbol
3323 table (as opposed to a shared lib or dynamically loaded file).
3324 TEXTADDR is the address of the text section.
3325 TEXTSIZE is the size of the text section.
3326 STABSECTS is the list of .stab sections in OBJFILE.
3327 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3328 .stabstr section exists.
3330 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3331 adjusted for coff details. */
3334 coffstab_build_psymtabs (struct objfile *objfile, int mainline,
3335 CORE_ADDR textaddr, unsigned int textsize,
3336 struct stab_section_list *stabsects,
3337 file_ptr stabstroffset, unsigned int stabstrsize)
3340 bfd *sym_bfd = objfile->obfd;
3341 char *name = bfd_get_filename (sym_bfd);
3342 struct dbx_symfile_info *info;
3343 unsigned int stabsize;
3345 /* There is already a dbx_symfile_info allocated by our caller.
3346 It might even contain some info from the coff symtab to help us. */
3347 info = objfile->deprecated_sym_stab_info;
3349 DBX_TEXT_ADDR (objfile) = textaddr;
3350 DBX_TEXT_SIZE (objfile) = textsize;
3352 #define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3353 DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
3354 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3356 if (stabstrsize > bfd_get_size (sym_bfd))
3357 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3358 DBX_STRINGTAB (objfile) = (char *)
3359 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3360 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3362 /* Now read in the string table in one big gulp. */
3364 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3366 perror_with_name (name);
3367 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3368 if (val != stabstrsize)
3369 perror_with_name (name);
3371 stabsread_new_init ();
3372 buildsym_new_init ();
3373 free_header_files ();
3374 init_header_files ();
3376 processing_acc_compilation = 1;
3378 /* In a coff file, we've already installed the minimal symbols that came
3379 from the coff (non-stab) symbol table, so always act like an
3380 incremental load here. */
3381 if (stabsects->next == NULL)
3383 stabsize = bfd_section_size (sym_bfd, stabsects->section);
3384 DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
3385 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3389 struct stab_section_list *stabsect;
3391 DBX_SYMCOUNT (objfile) = 0;
3392 for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
3394 stabsize = bfd_section_size (sym_bfd, stabsect->section);
3395 DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
3398 DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
3400 symbuf_sections = stabsects->next;
3401 symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
3405 dbx_symfile_read (objfile, 0);
3408 /* Scan and build partial symbols for an ELF symbol file.
3409 This ELF file has already been processed to get its minimal symbols.
3411 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3414 OBJFILE is the object file we are reading symbols from.
3415 ADDR is the address relative to which the symbols are (e.g.
3416 the base address of the text segment).
3417 MAINLINE is true if we are reading the main symbol
3418 table (as opposed to a shared lib or dynamically loaded file).
3419 STABSECT is the BFD section information for the .stab section.
3420 STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
3421 .stabstr section exists.
3423 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
3424 adjusted for elf details. */
3427 elfstab_build_psymtabs (struct objfile *objfile, int mainline,
3429 file_ptr stabstroffset, unsigned int stabstrsize)
3432 bfd *sym_bfd = objfile->obfd;
3433 char *name = bfd_get_filename (sym_bfd);
3434 struct dbx_symfile_info *info;
3435 struct cleanup *back_to = NULL;
3437 /* There is already a dbx_symfile_info allocated by our caller.
3438 It might even contain some info from the ELF symtab to help us. */
3439 info = objfile->deprecated_sym_stab_info;
3441 /* Find the first and last text address. dbx_symfile_read seems to
3443 find_text_range (sym_bfd, objfile);
3445 #define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
3446 DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
3447 DBX_SYMCOUNT (objfile)
3448 = bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile);
3449 DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
3450 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
3451 DBX_STAB_SECTION (objfile) = stabsect;
3453 if (stabstrsize > bfd_get_size (sym_bfd))
3454 error (_("ridiculous string table size: %d bytes"), stabstrsize);
3455 DBX_STRINGTAB (objfile) = (char *)
3456 obstack_alloc (&objfile->objfile_obstack, stabstrsize + 1);
3457 OBJSTAT (objfile, sz_strtab += stabstrsize + 1);
3459 /* Now read in the string table in one big gulp. */
3461 val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
3463 perror_with_name (name);
3464 val = bfd_bread (DBX_STRINGTAB (objfile), stabstrsize, sym_bfd);
3465 if (val != stabstrsize)
3466 perror_with_name (name);
3468 stabsread_new_init ();
3469 buildsym_new_init ();
3470 free_header_files ();
3471 init_header_files ();
3473 processing_acc_compilation = 1;
3476 symbuf_left = bfd_section_size (objfile->obfd, stabsect);
3477 stabs_data = symfile_relocate_debug_section (objfile->obfd, stabsect, NULL);
3479 back_to = make_cleanup (free_current_contents, (void *) &stabs_data);
3481 /* In an elf file, we've already installed the minimal symbols that came
3482 from the elf (non-stab) symbol table, so always act like an
3483 incremental load here. dbx_symfile_read should not generate any new
3484 minimal symbols, since we will have already read the ELF dynamic symbol
3485 table and normal symbol entries won't be in the ".stab" section; but in
3486 case it does, it will install them itself. */
3487 dbx_symfile_read (objfile, 0);
3490 do_cleanups (back_to);
3493 /* Scan and build partial symbols for a file with special sections for stabs
3494 and stabstrings. The file has already been processed to get its minimal
3495 symbols, and any other symbols that might be necessary to resolve GSYMs.
3497 This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
3500 OBJFILE is the object file we are reading symbols from.
3501 ADDR is the address relative to which the symbols are (e.g. the base address
3502 of the text segment).
3503 MAINLINE is true if we are reading the main symbol table (as opposed to a
3504 shared lib or dynamically loaded file).
3505 STAB_NAME is the name of the section that contains the stabs.
3506 STABSTR_NAME is the name of the section that contains the stab strings.
3508 This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
3511 stabsect_build_psymtabs (struct objfile *objfile, int mainline, char *stab_name,
3512 char *stabstr_name, char *text_name)
3515 bfd *sym_bfd = objfile->obfd;
3516 char *name = bfd_get_filename (sym_bfd);
3518 asection *stabstrsect;
3519 asection *text_sect;
3521 stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
3522 stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
3528 error (_("stabsect_build_psymtabs: Found stabs (%s), but not string \
3530 stab_name, stabstr_name);
3532 objfile->deprecated_sym_stab_info = (struct dbx_symfile_info *)
3533 xmalloc (sizeof (struct dbx_symfile_info));
3534 memset (objfile->deprecated_sym_stab_info, 0,
3535 sizeof (struct dbx_symfile_info));
3537 text_sect = bfd_get_section_by_name (sym_bfd, text_name);
3539 error (_("Can't find %s section in symbol file"), text_name);
3540 DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
3541 DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
3543 DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
3544 DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
3545 / DBX_SYMBOL_SIZE (objfile);
3546 DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
3547 DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
3549 if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
3550 error (_("ridiculous string table size: %d bytes"),
3551 DBX_STRINGTAB_SIZE (objfile));
3552 DBX_STRINGTAB (objfile) = (char *)
3553 obstack_alloc (&objfile->objfile_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
3554 OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
3556 /* Now read in the string table in one big gulp. */
3558 val = bfd_get_section_contents (sym_bfd, /* bfd */
3559 stabstrsect, /* bfd section */
3560 DBX_STRINGTAB (objfile), /* input buffer */
3561 0, /* offset into section */
3562 DBX_STRINGTAB_SIZE (objfile)); /* amount to read */
3565 perror_with_name (name);
3567 stabsread_new_init ();
3568 buildsym_new_init ();
3569 free_header_files ();
3570 init_header_files ();
3572 /* Now, do an incremental load */
3574 processing_acc_compilation = 1;
3575 dbx_symfile_read (objfile, 0);
3578 static struct sym_fns aout_sym_fns =
3580 bfd_target_aout_flavour,
3581 dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */
3582 dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */
3583 dbx_symfile_read, /* sym_read: read a symbol file into symtab */
3584 dbx_symfile_finish, /* sym_finish: finished with file, cleanup */
3585 default_symfile_offsets, /* sym_offsets: parse user's offsets to
3587 default_symfile_segments, /* sym_segments: Get segment information from
3589 NULL, /* sym_read_linetable */
3590 NULL /* next: pointer to next struct sym_fns */
3594 _initialize_dbxread (void)
3596 add_symtab_fns (&aout_sym_fns);