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-rw-r--r--gdb/dbxread.c2738
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diff --git a/gdb/dbxread.c b/gdb/dbxread.c
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+/* Read dbx symbol tables and convert to internal format, for GDB.
+ Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998
+ Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* This module provides three functions: dbx_symfile_init,
+ which initializes to read a symbol file; dbx_new_init, which
+ discards existing cached information when all symbols are being
+ discarded; and dbx_symfile_read, which reads a symbol table
+ from a file.
+
+ dbx_symfile_read only does the minimum work necessary for letting the
+ user "name" things symbolically; it does not read the entire symtab.
+ Instead, it reads the external and static symbols and puts them in partial
+ symbol tables. When more extensive information is requested of a
+ file, the corresponding partial symbol table is mutated into a full
+ fledged symbol table by going back and reading the symbols
+ for real. dbx_psymtab_to_symtab() is the function that does this */
+
+#include "defs.h"
+#include "gdb_string.h"
+
+#if defined(USG) || defined(__CYGNUSCLIB__)
+#include <sys/types.h>
+#include <fcntl.h>
+#endif
+
+#include "obstack.h"
+#include "gdb_stat.h"
+#include <ctype.h>
+#include "symtab.h"
+#include "breakpoint.h"
+#include "command.h"
+#include "target.h"
+#include "gdbcore.h" /* for bfd stuff */
+#include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
+#include "symfile.h"
+#include "objfiles.h"
+#include "buildsym.h"
+#include "stabsread.h"
+#include "gdb-stabs.h"
+#include "demangle.h"
+#include "language.h" /* Needed inside partial-stab.h */
+#include "complaints.h"
+
+#include "aout/aout64.h"
+#include "aout/stab_gnu.h" /* We always use GNU stabs, not native, now */
+
+
+/* This macro returns the size field of a minimal symbol, which is normally
+ stored in the "info" field. The macro can be overridden for specific
+ targets (e.g. MIPS16) that use the info field for other purposes. */
+#ifndef MSYMBOL_SIZE
+#define MSYMBOL_SIZE(msym) ((long) MSYMBOL_INFO (msym))
+#endif
+
+
+/* We put a pointer to this structure in the read_symtab_private field
+ of the psymtab. */
+
+struct symloc {
+
+ /* Offset within the file symbol table of first local symbol for this
+ file. */
+
+ int ldsymoff;
+
+ /* Length (in bytes) of the section of the symbol table devoted to
+ this file's symbols (actually, the section bracketed may contain
+ more than just this file's symbols). If ldsymlen is 0, the only
+ reason for this thing's existence is the dependency list. Nothing
+ else will happen when it is read in. */
+
+ int ldsymlen;
+
+ /* The size of each symbol in the symbol file (in external form). */
+
+ int symbol_size;
+
+ /* Further information needed to locate the symbols if they are in
+ an ELF file. */
+
+ int symbol_offset;
+ int string_offset;
+ int file_string_offset;
+};
+
+#define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
+#define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
+#define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
+#define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
+#define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
+#define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
+#define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
+
+
+/* Remember what we deduced to be the source language of this psymtab. */
+
+static enum language psymtab_language = language_unknown;
+
+/* Nonzero means give verbose info on gdb action. From main.c. */
+
+extern int info_verbose;
+
+/* The BFD for this file -- implicit parameter to next_symbol_text. */
+
+static bfd *symfile_bfd;
+
+/* The size of each symbol in the symbol file (in external form).
+ This is set by dbx_symfile_read when building psymtabs, and by
+ dbx_psymtab_to_symtab when building symtabs. */
+
+static unsigned symbol_size;
+
+/* This is the offset of the symbol table in the executable file. */
+
+static unsigned symbol_table_offset;
+
+/* This is the offset of the string table in the executable file. */
+
+static unsigned string_table_offset;
+
+/* For elf+stab executables, the n_strx field is not a simple index
+ into the string table. Instead, each .o file has a base offset in
+ the string table, and the associated symbols contain offsets from
+ this base. The following two variables contain the base offset for
+ the current and next .o files. */
+
+static unsigned int file_string_table_offset;
+static unsigned int next_file_string_table_offset;
+
+/* .o and NLM files contain unrelocated addresses which are based at
+ 0. When non-zero, this flag disables some of the special cases for
+ Solaris elf+stab text addresses at location 0. */
+
+static int symfile_relocatable = 0;
+
+/* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
+ relative to the function start address. */
+
+static int block_address_function_relative = 0;
+
+/* The lowest text address we have yet encountered. This is needed
+ because in an a.out file, there is no header field which tells us
+ what address the program is actually going to be loaded at, so we
+ need to make guesses based on the symbols (which *are* relocated to
+ reflect the address it will be loaded at). */
+
+static CORE_ADDR lowest_text_address;
+
+/* Non-zero if there is any line number info in the objfile. Prevents
+ end_psymtab from discarding an otherwise empty psymtab. */
+
+static int has_line_numbers;
+
+/* Complaints about the symbols we have encountered. */
+
+struct complaint lbrac_complaint =
+ {"bad block start address patched", 0, 0};
+
+struct complaint string_table_offset_complaint =
+ {"bad string table offset in symbol %d", 0, 0};
+
+struct complaint unknown_symtype_complaint =
+ {"unknown symbol type %s", 0, 0};
+
+struct complaint unknown_symchar_complaint =
+ {"unknown symbol descriptor `%c'", 0, 0};
+
+struct complaint lbrac_rbrac_complaint =
+ {"block start larger than block end", 0, 0};
+
+struct complaint lbrac_unmatched_complaint =
+ {"unmatched N_LBRAC before symtab pos %d", 0, 0};
+
+struct complaint lbrac_mismatch_complaint =
+ {"N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d", 0, 0};
+
+struct complaint repeated_header_complaint =
+ {"\"repeated\" header file %s not previously seen, at symtab pos %d", 0, 0};
+
+struct complaint unclaimed_bincl_complaint =
+ {"N_BINCL %s not in entries for any file, at symtab pos %d", 0, 0};
+
+/* During initial symbol readin, we need to have a structure to keep
+ track of which psymtabs have which bincls in them. This structure
+ is used during readin to setup the list of dependencies within each
+ partial symbol table. */
+
+struct header_file_location
+{
+ char *name; /* Name of header file */
+ int instance; /* See above */
+ struct partial_symtab *pst; /* Partial symtab that has the
+ BINCL/EINCL defs for this file */
+};
+
+/* The actual list and controling variables */
+static struct header_file_location *bincl_list, *next_bincl;
+static int bincls_allocated;
+
+/* Local function prototypes */
+
+static void
+process_now PARAMS ((struct objfile *));
+
+static void
+free_header_files PARAMS ((void));
+
+static void
+init_header_files PARAMS ((void));
+
+static void
+read_ofile_symtab PARAMS ((struct partial_symtab *));
+
+static void
+dbx_psymtab_to_symtab PARAMS ((struct partial_symtab *));
+
+static void
+dbx_psymtab_to_symtab_1 PARAMS ((struct partial_symtab *));
+
+static void
+read_dbx_dynamic_symtab PARAMS ((struct section_offsets *,
+ struct objfile *objfile));
+
+static void
+read_dbx_symtab PARAMS ((struct section_offsets *, struct objfile *,
+ CORE_ADDR, int));
+
+static void
+free_bincl_list PARAMS ((struct objfile *));
+
+static struct partial_symtab *
+find_corresponding_bincl_psymtab PARAMS ((char *, int));
+
+static void
+add_bincl_to_list PARAMS ((struct partial_symtab *, char *, int));
+
+static void
+init_bincl_list PARAMS ((int, struct objfile *));
+
+static char *
+dbx_next_symbol_text PARAMS ((struct objfile *));
+
+static void
+fill_symbuf PARAMS ((bfd *));
+
+static void
+dbx_symfile_init PARAMS ((struct objfile *));
+
+static void
+dbx_new_init PARAMS ((struct objfile *));
+
+static void
+dbx_symfile_read PARAMS ((struct objfile *, struct section_offsets *, int));
+
+static void
+dbx_symfile_finish PARAMS ((struct objfile *));
+
+static void
+record_minimal_symbol PARAMS ((char *, CORE_ADDR, int, struct objfile *));
+
+static void
+add_new_header_file PARAMS ((char *, int));
+
+static void
+add_old_header_file PARAMS ((char *, int));
+
+static void
+add_this_object_header_file PARAMS ((int));
+
+/* Free up old header file tables */
+
+static void
+free_header_files ()
+{
+ if (this_object_header_files)
+ {
+ free ((PTR)this_object_header_files);
+ this_object_header_files = NULL;
+ }
+ n_allocated_this_object_header_files = 0;
+}
+
+/* Allocate new header file tables */
+
+static void
+init_header_files ()
+{
+ n_allocated_this_object_header_files = 10;
+ this_object_header_files = (int *) xmalloc (10 * sizeof (int));
+}
+
+/* Add header file number I for this object file
+ at the next successive FILENUM. */
+
+static void
+add_this_object_header_file (i)
+ int i;
+{
+ if (n_this_object_header_files == n_allocated_this_object_header_files)
+ {
+ n_allocated_this_object_header_files *= 2;
+ this_object_header_files
+ = (int *) xrealloc ((char *) this_object_header_files,
+ n_allocated_this_object_header_files * sizeof (int));
+ }
+
+ this_object_header_files[n_this_object_header_files++] = i;
+}
+
+/* Add to this file an "old" header file, one already seen in
+ a previous object file. NAME is the header file's name.
+ INSTANCE is its instance code, to select among multiple
+ symbol tables for the same header file. */
+
+static void
+add_old_header_file (name, instance)
+ char *name;
+ int instance;
+{
+ register struct header_file *p = HEADER_FILES (current_objfile);
+ register int i;
+
+ for (i = 0; i < N_HEADER_FILES (current_objfile); i++)
+ if (STREQ (p[i].name, name) && instance == p[i].instance)
+ {
+ add_this_object_header_file (i);
+ return;
+ }
+ complain (&repeated_header_complaint, name, symnum);
+}
+
+/* Add to this file a "new" header file: definitions for its types follow.
+ NAME is the header file's name.
+ Most often this happens only once for each distinct header file,
+ but not necessarily. If it happens more than once, INSTANCE has
+ a different value each time, and references to the header file
+ use INSTANCE values to select among them.
+
+ dbx output contains "begin" and "end" markers for each new header file,
+ but at this level we just need to know which files there have been;
+ so we record the file when its "begin" is seen and ignore the "end". */
+
+static void
+add_new_header_file (name, instance)
+ char *name;
+ int instance;
+{
+ register int i;
+ register struct header_file *hfile;
+
+ /* Make sure there is room for one more header file. */
+
+ i = N_ALLOCATED_HEADER_FILES (current_objfile);
+
+ if (N_HEADER_FILES (current_objfile) == i)
+ {
+ if (i == 0)
+ {
+ N_ALLOCATED_HEADER_FILES (current_objfile) = 10;
+ HEADER_FILES (current_objfile) = (struct header_file *)
+ xmalloc (10 * sizeof (struct header_file));
+ }
+ else
+ {
+ i *= 2;
+ N_ALLOCATED_HEADER_FILES (current_objfile) = i;
+ HEADER_FILES (current_objfile) = (struct header_file *)
+ xrealloc ((char *) HEADER_FILES (current_objfile),
+ (i * sizeof (struct header_file)));
+ }
+ }
+
+ /* Create an entry for this header file. */
+
+ i = N_HEADER_FILES (current_objfile)++;
+ hfile = HEADER_FILES (current_objfile) + i;
+ hfile->name = savestring (name, strlen(name));
+ hfile->instance = instance;
+ hfile->length = 10;
+ hfile->vector
+ = (struct type **) xmalloc (10 * sizeof (struct type *));
+ memset (hfile->vector, 0, 10 * sizeof (struct type *));
+
+ add_this_object_header_file (i);
+}
+
+#if 0
+static struct type **
+explicit_lookup_type (real_filenum, index)
+ int real_filenum, index;
+{
+ register struct header_file *f = &HEADER_FILES (current_objfile)[real_filenum];
+
+ if (index >= f->length)
+ {
+ f->length *= 2;
+ f->vector = (struct type **)
+ xrealloc (f->vector, f->length * sizeof (struct type *));
+ memset (&f->vector[f->length / 2],
+ '\0', f->length * sizeof (struct type *) / 2);
+ }
+ return &f->vector[index];
+}
+#endif
+
+static void
+record_minimal_symbol (name, address, type, objfile)
+ char *name;
+ CORE_ADDR address;
+ int type;
+ struct objfile *objfile;
+{
+ enum minimal_symbol_type ms_type;
+ int section;
+ asection *bfd_section;
+
+ switch (type)
+ {
+ case N_TEXT | N_EXT:
+ ms_type = mst_text;
+ section = SECT_OFF_TEXT;
+ bfd_section = DBX_TEXT_SECTION (objfile);
+ break;
+ case N_DATA | N_EXT:
+ ms_type = mst_data;
+ section = SECT_OFF_DATA;
+ bfd_section = DBX_DATA_SECTION (objfile);
+ break;
+ case N_BSS | N_EXT:
+ ms_type = mst_bss;
+ section = SECT_OFF_BSS;
+ bfd_section = DBX_BSS_SECTION (objfile);
+ break;
+ case N_ABS | N_EXT:
+ ms_type = mst_abs;
+ section = -1;
+ bfd_section = NULL;
+ break;
+#ifdef N_SETV
+ case N_SETV | N_EXT:
+ ms_type = mst_data;
+ section = SECT_OFF_DATA;
+ bfd_section = DBX_DATA_SECTION (objfile);
+ break;
+ case N_SETV:
+ /* I don't think this type actually exists; since a N_SETV is the result
+ of going over many .o files, it doesn't make sense to have one
+ file local. */
+ ms_type = mst_file_data;
+ section = SECT_OFF_DATA;
+ bfd_section = DBX_DATA_SECTION (objfile);
+ break;
+#endif
+ case N_TEXT:
+ case N_NBTEXT:
+ case N_FN:
+ case N_FN_SEQ:
+ ms_type = mst_file_text;
+ section = SECT_OFF_TEXT;
+ bfd_section = DBX_TEXT_SECTION (objfile);
+ break;
+ case N_DATA:
+ ms_type = mst_file_data;
+
+ /* Check for __DYNAMIC, which is used by Sun shared libraries.
+ Record it as global even if it's local, not global, so
+ lookup_minimal_symbol can find it. We don't check symbol_leading_char
+ because for SunOS4 it always is '_'. */
+ if (name[8] == 'C' && STREQ ("__DYNAMIC", name))
+ ms_type = mst_data;
+
+ /* Same with virtual function tables, both global and static. */
+ {
+ char *tempstring = name;
+ if (tempstring[0] == bfd_get_symbol_leading_char (objfile->obfd))
+ ++tempstring;
+ if (VTBL_PREFIX_P ((tempstring)))
+ ms_type = mst_data;
+ }
+ section = SECT_OFF_DATA;
+ bfd_section = DBX_DATA_SECTION (objfile);
+ break;
+ case N_BSS:
+ ms_type = mst_file_bss;
+ section = SECT_OFF_BSS;
+ bfd_section = DBX_BSS_SECTION (objfile);
+ break;
+ default:
+ ms_type = mst_unknown;
+ section = -1;
+ bfd_section = NULL;
+ break;
+ }
+
+ if ((ms_type == mst_file_text || ms_type == mst_text)
+ && address < lowest_text_address)
+ lowest_text_address = address;
+
+ prim_record_minimal_symbol_and_info
+ (name, address, ms_type, NULL, section, bfd_section, objfile);
+}
+
+/* Scan and build partial symbols for a symbol file.
+ We have been initialized by a call to dbx_symfile_init, which
+ put all the relevant info into a "struct dbx_symfile_info",
+ hung off the objfile structure.
+
+ SECTION_OFFSETS contains offsets relative to which the symbols in the
+ various sections are (depending where the sections were actually loaded).
+ MAINLINE is true if we are reading the main symbol
+ table (as opposed to a shared lib or dynamically loaded file). */
+
+static void
+dbx_symfile_read (objfile, section_offsets, mainline)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline; /* FIXME comments above */
+{
+ bfd *sym_bfd;
+ int val;
+ struct cleanup *back_to;
+
+ val = strlen (objfile->name);
+
+ sym_bfd = objfile->obfd;
+
+ /* .o and .nlm files are relocatables with text, data and bss segs based at
+ 0. This flag disables special (Solaris stabs-in-elf only) fixups for
+ symbols with a value of 0. */
+
+ symfile_relocatable = bfd_get_file_flags (sym_bfd) & HAS_RELOC;
+
+ /* This is true for Solaris (and all other systems which put stabs
+ in sections, hopefully, since it would be silly to do things
+ differently from Solaris), and false for SunOS4 and other a.out
+ file formats. */
+ block_address_function_relative =
+ ((0 == strncmp (bfd_get_target (sym_bfd), "elf", 3))
+ || (0 == strncmp (bfd_get_target (sym_bfd), "som", 3))
+ || (0 == strncmp (bfd_get_target (sym_bfd), "coff", 4))
+ || (0 == strncmp (bfd_get_target (sym_bfd), "pe", 2))
+ || (0 == strncmp (bfd_get_target (sym_bfd), "nlm", 3)));
+
+ val = bfd_seek (sym_bfd, DBX_SYMTAB_OFFSET (objfile), SEEK_SET);
+ if (val < 0)
+ perror_with_name (objfile->name);
+
+ /* If we are reinitializing, or if we have never loaded syms yet, init */
+ if (mainline
+ || objfile->global_psymbols.size == 0
+ || objfile->static_psymbols.size == 0)
+ init_psymbol_list (objfile, DBX_SYMCOUNT (objfile));
+
+ symbol_size = DBX_SYMBOL_SIZE (objfile);
+ symbol_table_offset = DBX_SYMTAB_OFFSET (objfile);
+
+ free_pending_blocks ();
+ back_to = make_cleanup ((make_cleanup_func) really_free_pendings, 0);
+
+ init_minimal_symbol_collection ();
+ make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0);
+
+ /* Now that the symbol table data of the executable file are all in core,
+ process them and define symbols accordingly. */
+
+ read_dbx_symtab (section_offsets, objfile,
+ DBX_TEXT_ADDR (objfile),
+ DBX_TEXT_SIZE (objfile));
+
+ /* Add the dynamic symbols. */
+
+ read_dbx_dynamic_symtab (section_offsets, objfile);
+
+ /* Install any minimal symbols that have been collected as the current
+ minimal symbols for this objfile. */
+
+ install_minimal_symbols (objfile);
+
+ do_cleanups (back_to);
+}
+
+/* Initialize anything that needs initializing when a completely new
+ symbol file is specified (not just adding some symbols from another
+ file, e.g. a shared library). */
+
+static void
+dbx_new_init (ignore)
+ struct objfile *ignore;
+{
+ stabsread_new_init ();
+ buildsym_new_init ();
+ init_header_files ();
+}
+
+
+/* dbx_symfile_init ()
+ is the dbx-specific initialization routine for reading symbols.
+ It is passed a struct objfile which contains, among other things,
+ the BFD for the file whose symbols are being read, and a slot for a pointer
+ to "private data" which we fill with goodies.
+
+ We read the string table into malloc'd space and stash a pointer to it.
+
+ Since BFD doesn't know how to read debug symbols in a format-independent
+ way (and may never do so...), we have to do it ourselves. We will never
+ be called unless this is an a.out (or very similar) file.
+ FIXME, there should be a cleaner peephole into the BFD environment here. */
+
+#define DBX_STRINGTAB_SIZE_SIZE sizeof(long) /* FIXME */
+
+static void
+dbx_symfile_init (objfile)
+ struct objfile *objfile;
+{
+ int val;
+ bfd *sym_bfd = objfile->obfd;
+ char *name = bfd_get_filename (sym_bfd);
+ asection *text_sect;
+ unsigned char size_temp[DBX_STRINGTAB_SIZE_SIZE];
+
+ /* Allocate struct to keep track of the symfile */
+ objfile->sym_stab_info = (struct dbx_symfile_info *)
+ xmmalloc (objfile -> md, sizeof (struct dbx_symfile_info));
+ memset ((PTR) objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
+
+ DBX_TEXT_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".text");
+ DBX_DATA_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".data");
+ DBX_BSS_SECTION (objfile) = bfd_get_section_by_name (sym_bfd, ".bss");
+
+ /* FIXME POKING INSIDE BFD DATA STRUCTURES */
+#define STRING_TABLE_OFFSET (sym_bfd->origin + obj_str_filepos (sym_bfd))
+#define SYMBOL_TABLE_OFFSET (sym_bfd->origin + obj_sym_filepos (sym_bfd))
+
+ /* FIXME POKING INSIDE BFD DATA STRUCTURES */
+
+ DBX_SYMFILE_INFO (objfile)->stab_section_info = NULL;
+
+ text_sect = bfd_get_section_by_name (sym_bfd, ".text");
+ if (!text_sect)
+ error ("Can't find .text section in symbol file");
+ DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
+ DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
+
+ DBX_SYMBOL_SIZE (objfile) = obj_symbol_entry_size (sym_bfd);
+ DBX_SYMCOUNT (objfile) = bfd_get_symcount (sym_bfd);
+ DBX_SYMTAB_OFFSET (objfile) = SYMBOL_TABLE_OFFSET;
+
+ /* Read the string table and stash it away in the psymbol_obstack. It is
+ only needed as long as we need to expand psymbols into full symbols,
+ so when we blow away the psymbol the string table goes away as well.
+ Note that gdb used to use the results of attempting to malloc the
+ string table, based on the size it read, as a form of sanity check
+ for botched byte swapping, on the theory that a byte swapped string
+ table size would be so totally bogus that the malloc would fail. Now
+ that we put in on the psymbol_obstack, we can't do this since gdb gets
+ a fatal error (out of virtual memory) if the size is bogus. We can
+ however at least check to see if the size is less than the size of
+ the size field itself, or larger than the size of the entire file.
+ Note that all valid string tables have a size greater than zero, since
+ the bytes used to hold the size are included in the count. */
+
+ if (STRING_TABLE_OFFSET == 0)
+ {
+ /* It appears that with the existing bfd code, STRING_TABLE_OFFSET
+ will never be zero, even when there is no string table. This
+ would appear to be a bug in bfd. */
+ DBX_STRINGTAB_SIZE (objfile) = 0;
+ DBX_STRINGTAB (objfile) = NULL;
+ }
+ else
+ {
+ val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
+ if (val < 0)
+ perror_with_name (name);
+
+ memset ((PTR) size_temp, 0, sizeof (size_temp));
+ val = bfd_read ((PTR) size_temp, sizeof (size_temp), 1, sym_bfd);
+ if (val < 0)
+ {
+ perror_with_name (name);
+ }
+ else if (val == 0)
+ {
+ /* With the existing bfd code, STRING_TABLE_OFFSET will be set to
+ EOF if there is no string table, and attempting to read the size
+ from EOF will read zero bytes. */
+ DBX_STRINGTAB_SIZE (objfile) = 0;
+ DBX_STRINGTAB (objfile) = NULL;
+ }
+ else
+ {
+ /* Read some data that would appear to be the string table size.
+ If there really is a string table, then it is probably the right
+ size. Byteswap if necessary and validate the size. Note that
+ the minimum is DBX_STRINGTAB_SIZE_SIZE. If we just read some
+ random data that happened to be at STRING_TABLE_OFFSET, because
+ bfd can't tell us there is no string table, the sanity checks may
+ or may not catch this. */
+ DBX_STRINGTAB_SIZE (objfile) = bfd_h_get_32 (sym_bfd, size_temp);
+
+ if (DBX_STRINGTAB_SIZE (objfile) < sizeof (size_temp)
+ || DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
+ error ("ridiculous string table size (%d bytes).",
+ DBX_STRINGTAB_SIZE (objfile));
+
+ DBX_STRINGTAB (objfile) =
+ (char *) obstack_alloc (&objfile -> psymbol_obstack,
+ DBX_STRINGTAB_SIZE (objfile));
+ OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile));
+
+ /* Now read in the string table in one big gulp. */
+
+ val = bfd_seek (sym_bfd, STRING_TABLE_OFFSET, SEEK_SET);
+ if (val < 0)
+ perror_with_name (name);
+ val = bfd_read (DBX_STRINGTAB (objfile), DBX_STRINGTAB_SIZE (objfile), 1,
+ sym_bfd);
+ if (val != DBX_STRINGTAB_SIZE (objfile))
+ perror_with_name (name);
+ }
+ }
+}
+
+/* Perform any local cleanups required when we are done with a particular
+ objfile. I.E, we are in the process of discarding all symbol information
+ for an objfile, freeing up all memory held for it, and unlinking the
+ objfile struct from the global list of known objfiles. */
+
+static void
+dbx_symfile_finish (objfile)
+ struct objfile *objfile;
+{
+ if (objfile->sym_stab_info != NULL)
+ {
+ if (HEADER_FILES (objfile) != NULL)
+ {
+ register int i = N_HEADER_FILES (objfile);
+ register struct header_file *hfiles = HEADER_FILES (objfile);
+
+ while (--i >= 0)
+ {
+ free (hfiles [i].name);
+ free (hfiles [i].vector);
+ }
+ free ((PTR) hfiles);
+ }
+ mfree (objfile -> md, objfile->sym_stab_info);
+ }
+ free_header_files ();
+}
+
+
+/* Buffer for reading the symbol table entries. */
+static struct external_nlist symbuf[4096];
+static int symbuf_idx;
+static int symbuf_end;
+
+/* cont_elem is used for continuing information in cfront.
+ It saves information about which types need to be fixed up and
+ completed after all the stabs are read. */
+struct cont_elem
+ {
+ /* sym and stabsstring for continuing information in cfront */
+ struct symbol * sym;
+ char * stabs;
+ /* state dependancies (statics that must be preserved) */
+ int sym_idx;
+ int sym_end;
+ int symnum;
+ int (*func) PARAMS ((struct objfile *, struct symbol *, char *));
+ /* other state dependancies include:
+ (assumption is that these will not change since process_now FIXME!!)
+ stringtab_global
+ n_stabs
+ objfile
+ symfile_bfd */
+};
+
+static struct cont_elem *cont_list = 0;
+static int cont_limit = 0;
+static int cont_count = 0;
+
+/* Arrange for function F to be called with arguments SYM and P later
+ in the stabs reading process. */
+void
+process_later (sym, p, f)
+ struct symbol *sym;
+ char *p;
+ int (*f) PARAMS ((struct objfile *, struct symbol *, char *));
+{
+
+ /* Allocate more space for the deferred list. */
+ if (cont_count >= cont_limit - 1)
+ {
+ cont_limit += 32; /* chunk size */
+
+ cont_list
+ = (struct cont_elem *) xrealloc (cont_list,
+ (cont_limit
+ * sizeof (struct cont_elem)));
+ if (!cont_list)
+ error ("Virtual memory exhausted\n");
+ }
+
+ /* Save state variables so we can process these stabs later. */
+ cont_list[cont_count].sym_idx = symbuf_idx;
+ cont_list[cont_count].sym_end = symbuf_end;
+ cont_list[cont_count].symnum = symnum;
+ cont_list[cont_count].sym = sym;
+ cont_list[cont_count].stabs = p;
+ cont_list[cont_count].func = f;
+ cont_count++;
+}
+
+/* Call deferred funtions in CONT_LIST. */
+
+static void
+process_now (objfile)
+ struct objfile *objfile;
+{
+ int i;
+ int save_symbuf_idx;
+ int save_symbuf_end;
+ int save_symnum;
+ struct symbol *sym;
+ char *stabs;
+ int err;
+ int (*func) PARAMS ((struct objfile *, struct symbol *, char *));
+
+ /* Save the state of our caller, we'll want to restore it before
+ returning. */
+ save_symbuf_idx = symbuf_idx;
+ save_symbuf_end = symbuf_end;
+ save_symnum = symnum;
+
+ /* Iterate over all the deferred stabs. */
+ for (i = 0; i < cont_count; i++)
+ {
+ /* Restore the state for this deferred stab. */
+ symbuf_idx = cont_list[i].sym_idx;
+ symbuf_end = cont_list[i].sym_end;
+ symnum = cont_list[i].symnum;
+ sym = cont_list[i].sym;
+ stabs = cont_list[i].stabs;
+ func = cont_list[i].func;
+
+ /* Call the function to handle this deferrd stab. */
+ err = (*func) (objfile, sym, stabs);
+ if (err)
+ error ("Internal error: unable to resolve stab.\n");
+ }
+
+ /* Restore our caller's state. */
+ symbuf_idx = save_symbuf_idx;
+ symbuf_end = save_symbuf_end;
+ symnum = save_symnum;
+ cont_count = 0;
+}
+
+
+/* Name of last function encountered. Used in Solaris to approximate
+ object file boundaries. */
+static char *last_function_name;
+
+/* The address in memory of the string table of the object file we are
+ reading (which might not be the "main" object file, but might be a
+ shared library or some other dynamically loaded thing). This is
+ set by read_dbx_symtab when building psymtabs, and by
+ read_ofile_symtab when building symtabs, and is used only by
+ next_symbol_text. FIXME: If that is true, we don't need it when
+ building psymtabs, right? */
+static char *stringtab_global;
+
+/* These variables are used to control fill_symbuf when the stabs
+ symbols are not contiguous (as may be the case when a COFF file is
+ linked using --split-by-reloc). */
+static struct stab_section_list *symbuf_sections;
+static unsigned int symbuf_left;
+static unsigned int symbuf_read;
+
+/* Refill the symbol table input buffer
+ and set the variables that control fetching entries from it.
+ Reports an error if no data available.
+ This function can read past the end of the symbol table
+ (into the string table) but this does no harm. */
+
+static void
+fill_symbuf (sym_bfd)
+ bfd *sym_bfd;
+{
+ unsigned int count;
+ int nbytes;
+
+ if (symbuf_sections == NULL)
+ count = sizeof (symbuf);
+ else
+ {
+ if (symbuf_left <= 0)
+ {
+ file_ptr filepos = symbuf_sections->section->filepos;
+ if (bfd_seek (sym_bfd, filepos, SEEK_SET) != 0)
+ perror_with_name (bfd_get_filename (sym_bfd));
+ symbuf_left = bfd_section_size (sym_bfd, symbuf_sections->section);
+ symbol_table_offset = filepos - symbuf_read;
+ symbuf_sections = symbuf_sections->next;
+ }
+
+ count = symbuf_left;
+ if (count > sizeof (symbuf))
+ count = sizeof (symbuf);
+ }
+
+ nbytes = bfd_read ((PTR)symbuf, count, 1, sym_bfd);
+ if (nbytes < 0)
+ perror_with_name (bfd_get_filename (sym_bfd));
+ else if (nbytes == 0)
+ error ("Premature end of file reading symbol table");
+ symbuf_end = nbytes / symbol_size;
+ symbuf_idx = 0;
+ symbuf_left -= nbytes;
+ symbuf_read += nbytes;
+}
+
+#define SWAP_SYMBOL(symp, abfd) \
+ { \
+ (symp)->n_strx = bfd_h_get_32(abfd, \
+ (unsigned char *)&(symp)->n_strx); \
+ (symp)->n_desc = bfd_h_get_16 (abfd, \
+ (unsigned char *)&(symp)->n_desc); \
+ (symp)->n_value = bfd_h_get_32 (abfd, \
+ (unsigned char *)&(symp)->n_value); \
+ }
+
+#define INTERNALIZE_SYMBOL(intern, extern, abfd) \
+ { \
+ (intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
+ (intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
+ (intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
+ (intern).n_value = bfd_h_get_32 (abfd, (extern)->e_value); \
+ }
+
+/* Invariant: The symbol pointed to by symbuf_idx is the first one
+ that hasn't been swapped. Swap the symbol at the same time
+ that symbuf_idx is incremented. */
+
+/* dbx allows the text of a symbol name to be continued into the
+ next symbol name! When such a continuation is encountered
+ (a \ at the end of the text of a name)
+ call this function to get the continuation. */
+
+static char *
+dbx_next_symbol_text (objfile)
+ struct objfile *objfile;
+{
+ struct internal_nlist nlist;
+
+ if (symbuf_idx == symbuf_end)
+ fill_symbuf (symfile_bfd);
+
+ symnum++;
+ INTERNALIZE_SYMBOL(nlist, &symbuf[symbuf_idx], symfile_bfd);
+ OBJSTAT (objfile, n_stabs++);
+
+ symbuf_idx++;
+
+ return nlist.n_strx + stringtab_global + file_string_table_offset;
+}
+
+/* Initialize the list of bincls to contain none and have some
+ allocated. */
+
+static void
+init_bincl_list (number, objfile)
+ int number;
+ struct objfile *objfile;
+{
+ bincls_allocated = number;
+ next_bincl = bincl_list = (struct header_file_location *)
+ xmmalloc (objfile -> md, bincls_allocated * sizeof(struct header_file_location));
+}
+
+/* Add a bincl to the list. */
+
+static void
+add_bincl_to_list (pst, name, instance)
+ struct partial_symtab *pst;
+ char *name;
+ int instance;
+{
+ if (next_bincl >= bincl_list + bincls_allocated)
+ {
+ int offset = next_bincl - bincl_list;
+ bincls_allocated *= 2;
+ bincl_list = (struct header_file_location *)
+ xmrealloc (pst->objfile->md, (char *)bincl_list,
+ bincls_allocated * sizeof (struct header_file_location));
+ next_bincl = bincl_list + offset;
+ }
+ next_bincl->pst = pst;
+ next_bincl->instance = instance;
+ next_bincl++->name = name;
+}
+
+/* Given a name, value pair, find the corresponding
+ bincl in the list. Return the partial symtab associated
+ with that header_file_location. */
+
+static struct partial_symtab *
+find_corresponding_bincl_psymtab (name, instance)
+ char *name;
+ int instance;
+{
+ struct header_file_location *bincl;
+
+ for (bincl = bincl_list; bincl < next_bincl; bincl++)
+ if (bincl->instance == instance
+ && STREQ (name, bincl->name))
+ return bincl->pst;
+
+ complain (&repeated_header_complaint, name, symnum);
+ return (struct partial_symtab *) 0;
+}
+
+/* Free the storage allocated for the bincl list. */
+
+static void
+free_bincl_list (objfile)
+ struct objfile *objfile;
+{
+ mfree (objfile -> md, (PTR)bincl_list);
+ bincls_allocated = 0;
+}
+
+/* Scan a SunOs dynamic symbol table for symbols of interest and
+ add them to the minimal symbol table. */
+
+static void
+read_dbx_dynamic_symtab (section_offsets, objfile)
+ struct section_offsets *section_offsets;
+ struct objfile *objfile;
+{
+ bfd *abfd = objfile->obfd;
+ struct cleanup *back_to;
+ int counter;
+ long dynsym_size;
+ long dynsym_count;
+ asymbol **dynsyms;
+ asymbol **symptr;
+ arelent **relptr;
+ long dynrel_size;
+ long dynrel_count;
+ arelent **dynrels;
+ CORE_ADDR sym_value;
+ char *name;
+
+ /* Check that the symbol file has dynamic symbols that we know about.
+ bfd_arch_unknown can happen if we are reading a sun3 symbol file
+ on a sun4 host (and vice versa) and bfd is not configured
+ --with-target=all. This would trigger an assertion in bfd/sunos.c,
+ so we ignore the dynamic symbols in this case. */
+ if (bfd_get_flavour (abfd) != bfd_target_aout_flavour
+ || (bfd_get_file_flags (abfd) & DYNAMIC) == 0
+ || bfd_get_arch (abfd) == bfd_arch_unknown)
+ return;
+
+ dynsym_size = bfd_get_dynamic_symtab_upper_bound (abfd);
+ if (dynsym_size < 0)
+ return;
+
+ dynsyms = (asymbol **) xmalloc (dynsym_size);
+ back_to = make_cleanup (free, dynsyms);
+
+ dynsym_count = bfd_canonicalize_dynamic_symtab (abfd, dynsyms);
+ if (dynsym_count < 0)
+ {
+ do_cleanups (back_to);
+ return;
+ }
+
+ /* Enter dynamic symbols into the minimal symbol table
+ if this is a stripped executable. */
+ if (bfd_get_symcount (abfd) <= 0)
+ {
+ symptr = dynsyms;
+ for (counter = 0; counter < dynsym_count; counter++, symptr++)
+ {
+ asymbol *sym = *symptr;
+ asection *sec;
+ int type;
+
+ sec = bfd_get_section (sym);
+
+ /* BFD symbols are section relative. */
+ sym_value = sym->value + sec->vma;
+
+ if (bfd_get_section_flags (abfd, sec) & SEC_CODE)
+ {
+ sym_value += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ type = N_TEXT;
+ }
+ else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
+ {
+ sym_value += ANOFFSET (section_offsets, SECT_OFF_DATA);
+ type = N_DATA;
+ }
+ else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
+ {
+ sym_value += ANOFFSET (section_offsets, SECT_OFF_BSS);
+ type = N_BSS;
+ }
+ else
+ continue;
+
+ if (sym->flags & BSF_GLOBAL)
+ type |= N_EXT;
+
+ record_minimal_symbol ((char *) bfd_asymbol_name (sym), sym_value,
+ type, objfile);
+ }
+ }
+
+ /* Symbols from shared libraries have a dynamic relocation entry
+ that points to the associated slot in the procedure linkage table.
+ We make a mininal symbol table entry with type mst_solib_trampoline
+ at the address in the procedure linkage table. */
+ dynrel_size = bfd_get_dynamic_reloc_upper_bound (abfd);
+ if (dynrel_size < 0)
+ {
+ do_cleanups (back_to);
+ return;
+ }
+
+ dynrels = (arelent **) xmalloc (dynrel_size);
+ make_cleanup (free, dynrels);
+
+ dynrel_count = bfd_canonicalize_dynamic_reloc (abfd, dynrels, dynsyms);
+ if (dynrel_count < 0)
+ {
+ do_cleanups (back_to);
+ return;
+ }
+
+ for (counter = 0, relptr = dynrels;
+ counter < dynrel_count;
+ counter++, relptr++)
+ {
+ arelent *rel = *relptr;
+ CORE_ADDR address =
+ rel->address + ANOFFSET (section_offsets, SECT_OFF_DATA);
+
+ switch (bfd_get_arch (abfd))
+ {
+ case bfd_arch_sparc:
+ if (rel->howto->type != RELOC_JMP_SLOT)
+ continue;
+ break;
+ case bfd_arch_m68k:
+ /* `16' is the type BFD produces for a jump table relocation. */
+ if (rel->howto->type != 16)
+ continue;
+
+ /* Adjust address in the jump table to point to
+ the start of the bsr instruction. */
+ address -= 2;
+ break;
+ default:
+ continue;
+ }
+
+ name = (char *) bfd_asymbol_name (*rel->sym_ptr_ptr);
+ prim_record_minimal_symbol (name, address, mst_solib_trampoline,
+ objfile);
+ }
+
+ do_cleanups (back_to);
+}
+
+/* Given pointers to an a.out symbol table in core containing dbx
+ style data, setup partial_symtab's describing each source file for
+ which debugging information is available.
+ SYMFILE_NAME is the name of the file we are reading from
+ and SECTION_OFFSETS is the set of offsets for the various sections
+ of the file (a set of zeros if the mainline program). */
+
+static void
+read_dbx_symtab (section_offsets, objfile, text_addr, text_size)
+ struct section_offsets *section_offsets;
+ struct objfile *objfile;
+ CORE_ADDR text_addr;
+ int text_size;
+{
+ register struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch */
+ struct internal_nlist nlist;
+
+ register char *namestring;
+ int nsl;
+ int past_first_source_file = 0;
+ CORE_ADDR last_o_file_start = 0;
+ CORE_ADDR last_function_start = 0;
+ struct cleanup *back_to;
+ bfd *abfd;
+ int textlow_not_set;
+
+ /* Current partial symtab */
+ struct partial_symtab *pst;
+
+ /* List of current psymtab's include files */
+ char **psymtab_include_list;
+ int includes_allocated;
+ int includes_used;
+
+ /* Index within current psymtab dependency list */
+ struct partial_symtab **dependency_list;
+ int dependencies_used, dependencies_allocated;
+
+ /* FIXME. We probably want to change stringtab_global rather than add this
+ while processing every symbol entry. FIXME. */
+ file_string_table_offset = 0;
+ next_file_string_table_offset = 0;
+
+ stringtab_global = DBX_STRINGTAB (objfile);
+
+ pst = (struct partial_symtab *) 0;
+
+ includes_allocated = 30;
+ includes_used = 0;
+ psymtab_include_list = (char **) alloca (includes_allocated *
+ sizeof (char *));
+
+ dependencies_allocated = 30;
+ dependencies_used = 0;
+ dependency_list =
+ (struct partial_symtab **) alloca (dependencies_allocated *
+ sizeof (struct partial_symtab *));
+
+ /* Init bincl list */
+ init_bincl_list (20, objfile);
+ back_to = make_cleanup ((make_cleanup_func) free_bincl_list, objfile);
+
+ last_source_file = NULL;
+
+ lowest_text_address = (CORE_ADDR)-1;
+
+ symfile_bfd = objfile->obfd; /* For next_text_symbol */
+ abfd = objfile->obfd;
+ symbuf_end = symbuf_idx = 0;
+ next_symbol_text_func = dbx_next_symbol_text;
+ textlow_not_set = 1;
+ has_line_numbers = 0;
+
+ for (symnum = 0; symnum < DBX_SYMCOUNT (objfile); symnum++)
+ {
+ /* Get the symbol for this run and pull out some info */
+ QUIT; /* allow this to be interruptable */
+ if (symbuf_idx == symbuf_end)
+ fill_symbuf (abfd);
+ bufp = &symbuf[symbuf_idx++];
+
+ /*
+ * Special case to speed up readin.
+ */
+ if (bfd_h_get_8 (abfd, bufp->e_type) == N_SLINE)
+ {
+ has_line_numbers = 1;
+ continue;
+ }
+
+ INTERNALIZE_SYMBOL (nlist, bufp, abfd);
+ OBJSTAT (objfile, n_stabs++);
+
+ /* Ok. There is a lot of code duplicated in the rest of this
+ switch statement (for efficiency reasons). Since I don't
+ like duplicating code, I will do my penance here, and
+ describe the code which is duplicated:
+
+ *) The assignment to namestring.
+ *) The call to strchr.
+ *) The addition of a partial symbol the the two partial
+ symbol lists. This last is a large section of code, so
+ I've imbedded it in the following macro.
+ */
+
+/* Set namestring based on nlist. If the string table index is invalid,
+ give a fake name, and print a single error message per symbol file read,
+ rather than abort the symbol reading or flood the user with messages. */
+
+/*FIXME: Too many adds and indirections in here for the inner loop. */
+#define SET_NAMESTRING()\
+ if (((unsigned)CUR_SYMBOL_STRX + file_string_table_offset) >= \
+ DBX_STRINGTAB_SIZE (objfile)) { \
+ complain (&string_table_offset_complaint, symnum); \
+ namestring = "<bad string table offset>"; \
+ } else \
+ namestring = CUR_SYMBOL_STRX + file_string_table_offset + \
+ DBX_STRINGTAB (objfile)
+
+#define CUR_SYMBOL_TYPE nlist.n_type
+#define CUR_SYMBOL_VALUE nlist.n_value
+#define CUR_SYMBOL_STRX nlist.n_strx
+#define DBXREAD_ONLY
+#define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms)\
+ start_psymtab(ofile, secoff, fname, low, symoff, global_syms, static_syms)
+#define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
+ end_psymtab(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)
+
+#include "partial-stab.h"
+ }
+
+ /* If there's stuff to be cleaned up, clean it up. */
+ if (DBX_SYMCOUNT (objfile) > 0 /* We have some syms */
+/*FIXME, does this have a bug at start address 0? */
+ && last_o_file_start
+ && objfile -> ei.entry_point < nlist.n_value
+ && objfile -> ei.entry_point >= last_o_file_start)
+ {
+ objfile -> ei.entry_file_lowpc = last_o_file_start;
+ objfile -> ei.entry_file_highpc = nlist.n_value;
+ }
+
+ if (pst)
+ {
+ /* Don't set pst->texthigh lower than it already is. */
+ CORE_ADDR text_end =
+ (lowest_text_address == (CORE_ADDR)-1
+ ? (text_addr + section_offsets->offsets[SECT_OFF_TEXT])
+ : lowest_text_address)
+ + text_size;
+
+ end_psymtab (pst, psymtab_include_list, includes_used,
+ symnum * symbol_size,
+ text_end > pst->texthigh ? text_end : pst->texthigh,
+ dependency_list, dependencies_used, textlow_not_set);
+ }
+
+ do_cleanups (back_to);
+}
+
+/* Allocate and partially fill a partial symtab. It will be
+ completely filled at the end of the symbol list.
+
+ SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
+ is the address relative to which its symbols are (incremental) or 0
+ (normal). */
+
+
+struct partial_symtab *
+start_psymtab (objfile, section_offsets,
+ filename, textlow, ldsymoff, global_syms, static_syms)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ char *filename;
+ CORE_ADDR textlow;
+ int ldsymoff;
+ struct partial_symbol **global_syms;
+ struct partial_symbol **static_syms;
+{
+ struct partial_symtab *result =
+ start_psymtab_common(objfile, section_offsets,
+ filename, textlow, global_syms, static_syms);
+
+ result->read_symtab_private = (char *)
+ obstack_alloc (&objfile -> psymbol_obstack, sizeof (struct symloc));
+ LDSYMOFF(result) = ldsymoff;
+ result->read_symtab = dbx_psymtab_to_symtab;
+ SYMBOL_SIZE(result) = symbol_size;
+ SYMBOL_OFFSET(result) = symbol_table_offset;
+ STRING_OFFSET(result) = string_table_offset;
+ FILE_STRING_OFFSET(result) = file_string_table_offset;
+
+ /* If we're handling an ELF file, drag some section-relocation info
+ for this source file out of the ELF symbol table, to compensate for
+ Sun brain death. This replaces the section_offsets in this psymtab,
+ if successful. */
+ elfstab_offset_sections (objfile, result);
+
+ /* Deduce the source language from the filename for this psymtab. */
+ psymtab_language = deduce_language_from_filename (filename);
+
+ return result;
+}
+
+/* Close off the current usage of PST.
+ Returns PST or NULL if the partial symtab was empty and thrown away.
+
+ FIXME: List variables and peculiarities of same. */
+
+struct partial_symtab *
+end_psymtab (pst, include_list, num_includes, capping_symbol_offset,
+ capping_text, dependency_list, number_dependencies, textlow_not_set)
+ struct partial_symtab *pst;
+ char **include_list;
+ int num_includes;
+ int capping_symbol_offset;
+ CORE_ADDR capping_text;
+ struct partial_symtab **dependency_list;
+ int number_dependencies;
+ int textlow_not_set;
+{
+ int i;
+ struct objfile *objfile = pst -> objfile;
+
+ if (capping_symbol_offset != -1)
+ LDSYMLEN(pst) = capping_symbol_offset - LDSYMOFF(pst);
+ pst->texthigh = capping_text;
+
+#ifdef SOFUN_ADDRESS_MAYBE_MISSING
+ /* Under Solaris, the N_SO symbols always have a value of 0,
+ instead of the usual address of the .o file. Therefore,
+ we have to do some tricks to fill in texthigh and textlow.
+ The first trick is in partial-stab.h: if we see a static
+ or global function, and the textlow for the current pst
+ is not set (ie: textlow_not_set), then we use that function's
+ address for the textlow of the pst. */
+
+ /* Now, to fill in texthigh, we remember the last function seen
+ in the .o file (also in partial-stab.h). Also, there's a hack in
+ bfd/elf.c and gdb/elfread.c to pass the ELF st_size field
+ to here via the misc_info field. Therefore, we can fill in
+ a reliable texthigh by taking the address plus size of the
+ last function in the file. */
+
+ if (pst->texthigh == 0 && last_function_name)
+ {
+ char *p;
+ int n;
+ struct minimal_symbol *minsym;
+
+ p = strchr (last_function_name, ':');
+ if (p == NULL)
+ p = last_function_name;
+ n = p - last_function_name;
+ p = alloca (n + 2);
+ strncpy (p, last_function_name, n);
+ p[n] = 0;
+
+ minsym = lookup_minimal_symbol (p, pst->filename, objfile);
+ if (minsym == NULL)
+ {
+ /* Sun Fortran appends an underscore to the minimal symbol name,
+ try again with an appended underscore if the minimal symbol
+ was not found. */
+ p[n] = '_';
+ p[n + 1] = 0;
+ minsym = lookup_minimal_symbol (p, pst->filename, objfile);
+ }
+
+ if (minsym)
+ pst->texthigh = SYMBOL_VALUE_ADDRESS (minsym) + MSYMBOL_SIZE (minsym);
+
+ last_function_name = NULL;
+ }
+
+ /* this test will be true if the last .o file is only data */
+ if (textlow_not_set)
+ pst->textlow = pst->texthigh;
+ else
+ {
+ struct partial_symtab *p1;
+
+ /* If we know our own starting text address, then walk through all other
+ psymtabs for this objfile, and if any didn't know their ending text
+ address, set it to our starting address. Take care to not set our
+ own ending address to our starting address, nor to set addresses on
+ `dependency' files that have both textlow and texthigh zero. */
+
+ ALL_OBJFILE_PSYMTABS (objfile, p1)
+ {
+ if (p1->texthigh == 0 && p1->textlow != 0 && p1 != pst)
+ {
+ p1->texthigh = pst->textlow;
+ /* if this file has only data, then make textlow match texthigh */
+ if (p1->textlow == 0)
+ p1->textlow = p1->texthigh;
+ }
+ }
+ }
+
+ /* End of kludge for patching Solaris textlow and texthigh. */
+#endif /* SOFUN_ADDRESS_MAYBE_MISSING. */
+
+ pst->n_global_syms =
+ objfile->global_psymbols.next - (objfile->global_psymbols.list + pst->globals_offset);
+ pst->n_static_syms =
+ objfile->static_psymbols.next - (objfile->static_psymbols.list + pst->statics_offset);
+
+ pst->number_of_dependencies = number_dependencies;
+ if (number_dependencies)
+ {
+ pst->dependencies = (struct partial_symtab **)
+ obstack_alloc (&objfile->psymbol_obstack,
+ number_dependencies * sizeof (struct partial_symtab *));
+ memcpy (pst->dependencies, dependency_list,
+ number_dependencies * sizeof (struct partial_symtab *));
+ }
+ else
+ pst->dependencies = 0;
+
+ for (i = 0; i < num_includes; i++)
+ {
+ struct partial_symtab *subpst =
+ allocate_psymtab (include_list[i], objfile);
+
+ subpst->section_offsets = pst->section_offsets;
+ subpst->read_symtab_private =
+ (char *) obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (struct symloc));
+ LDSYMOFF(subpst) =
+ LDSYMLEN(subpst) =
+ subpst->textlow =
+ subpst->texthigh = 0;
+
+ /* We could save slight bits of space by only making one of these,
+ shared by the entire set of include files. FIXME-someday. */
+ subpst->dependencies = (struct partial_symtab **)
+ obstack_alloc (&objfile->psymbol_obstack,
+ sizeof (struct partial_symtab *));
+ subpst->dependencies[0] = pst;
+ subpst->number_of_dependencies = 1;
+
+ subpst->globals_offset =
+ subpst->n_global_syms =
+ subpst->statics_offset =
+ subpst->n_static_syms = 0;
+
+ subpst->readin = 0;
+ subpst->symtab = 0;
+ subpst->read_symtab = pst->read_symtab;
+ }
+
+ sort_pst_symbols (pst);
+
+ /* If there is already a psymtab or symtab for a file of this name, remove it.
+ (If there is a symtab, more drastic things also happen.)
+ This happens in VxWorks. */
+ free_named_symtabs (pst->filename);
+
+ if (num_includes == 0
+ && number_dependencies == 0
+ && pst->n_global_syms == 0
+ && pst->n_static_syms == 0
+ && has_line_numbers == 0)
+ {
+ /* Throw away this psymtab, it's empty. We can't deallocate it, since
+ it is on the obstack, but we can forget to chain it on the list. */
+ /* Empty psymtabs happen as a result of header files which don't have
+ any symbols in them. There can be a lot of them. But this check
+ is wrong, in that a psymtab with N_SLINE entries but nothing else
+ is not empty, but we don't realize that. Fixing that without slowing
+ things down might be tricky. */
+
+ discard_psymtab (pst);
+
+ /* Indicate that psymtab was thrown away. */
+ pst = (struct partial_symtab *)NULL;
+ }
+ return pst;
+}
+
+static void
+dbx_psymtab_to_symtab_1 (pst)
+ struct partial_symtab *pst;
+{
+ struct cleanup *old_chain;
+ int i;
+
+ if (!pst)
+ return;
+
+ if (pst->readin)
+ {
+ fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
+ pst->filename);
+ return;
+ }
+
+ /* Read in all partial symtabs on which this one is dependent */
+ for (i = 0; i < pst->number_of_dependencies; i++)
+ if (!pst->dependencies[i]->readin)
+ {
+ /* Inform about additional files that need to be read in. */
+ if (info_verbose)
+ {
+ fputs_filtered (" ", gdb_stdout);
+ wrap_here ("");
+ fputs_filtered ("and ", gdb_stdout);
+ wrap_here ("");
+ printf_filtered ("%s...", pst->dependencies[i]->filename);
+ wrap_here (""); /* Flush output */
+ gdb_flush (gdb_stdout);
+ }
+ dbx_psymtab_to_symtab_1 (pst->dependencies[i]);
+ }
+
+ if (LDSYMLEN(pst)) /* Otherwise it's a dummy */
+ {
+ /* Init stuff necessary for reading in symbols */
+ stabsread_init ();
+ buildsym_init ();
+ old_chain = make_cleanup ((make_cleanup_func) really_free_pendings, 0);
+ file_string_table_offset = FILE_STRING_OFFSET (pst);
+ symbol_size = SYMBOL_SIZE (pst);
+
+ /* Read in this file's symbols */
+ bfd_seek (pst->objfile->obfd, SYMBOL_OFFSET (pst), SEEK_SET);
+ read_ofile_symtab (pst);
+ sort_symtab_syms (pst->symtab);
+
+ do_cleanups (old_chain);
+ }
+
+ pst->readin = 1;
+}
+
+/* Read in all of the symbols for a given psymtab for real.
+ Be verbose about it if the user wants that. */
+
+static void
+dbx_psymtab_to_symtab (pst)
+ struct partial_symtab *pst;
+{
+ bfd *sym_bfd;
+
+ if (!pst)
+ return;
+
+ if (pst->readin)
+ {
+ fprintf_unfiltered (gdb_stderr, "Psymtab for %s already read in. Shouldn't happen.\n",
+ pst->filename);
+ return;
+ }
+
+ if (LDSYMLEN(pst) || pst->number_of_dependencies)
+ {
+ /* Print the message now, before reading the string table,
+ to avoid disconcerting pauses. */
+ if (info_verbose)
+ {
+ printf_filtered ("Reading in symbols for %s...", pst->filename);
+ gdb_flush (gdb_stdout);
+ }
+
+ sym_bfd = pst->objfile->obfd;
+
+ next_symbol_text_func = dbx_next_symbol_text;
+
+ dbx_psymtab_to_symtab_1 (pst);
+
+ /* Match with global symbols. This only needs to be done once,
+ after all of the symtabs and dependencies have been read in. */
+ scan_file_globals (pst->objfile);
+
+ /* Finish up the debug error message. */
+ if (info_verbose)
+ printf_filtered ("done.\n");
+ }
+}
+
+/* Read in a defined section of a specific object file's symbols. */
+
+static void
+read_ofile_symtab (pst)
+ struct partial_symtab *pst;
+{
+ register char *namestring;
+ register struct external_nlist *bufp;
+ struct internal_nlist nlist;
+ unsigned char type;
+ unsigned max_symnum;
+ register bfd *abfd;
+ struct objfile *objfile;
+ int sym_offset; /* Offset to start of symbols to read */
+ int sym_size; /* Size of symbols to read */
+ CORE_ADDR text_offset; /* Start of text segment for symbols */
+ int text_size; /* Size of text segment for symbols */
+ struct section_offsets *section_offsets;
+
+ objfile = pst->objfile;
+ sym_offset = LDSYMOFF(pst);
+ sym_size = LDSYMLEN(pst);
+ text_offset = pst->textlow;
+ text_size = pst->texthigh - pst->textlow;
+ section_offsets = pst->section_offsets;
+
+ current_objfile = objfile;
+ subfile_stack = NULL;
+
+ stringtab_global = DBX_STRINGTAB (objfile);
+ last_source_file = NULL;
+
+ abfd = objfile->obfd;
+ symfile_bfd = objfile->obfd; /* Implicit param to next_text_symbol */
+ symbuf_end = symbuf_idx = 0;
+
+ /* It is necessary to actually read one symbol *before* the start
+ of this symtab's symbols, because the GCC_COMPILED_FLAG_SYMBOL
+ occurs before the N_SO symbol.
+
+ Detecting this in read_dbx_symtab
+ would slow down initial readin, so we look for it here instead. */
+ if (!processing_acc_compilation && sym_offset >= (int)symbol_size)
+ {
+ bfd_seek (symfile_bfd, sym_offset - symbol_size, SEEK_CUR);
+ fill_symbuf (abfd);
+ bufp = &symbuf[symbuf_idx++];
+ INTERNALIZE_SYMBOL (nlist, bufp, abfd);
+ OBJSTAT (objfile, n_stabs++);
+
+ SET_NAMESTRING ();
+
+ processing_gcc_compilation = 0;
+ if (nlist.n_type == N_TEXT)
+ {
+ const char *tempstring = namestring;
+
+ if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
+ processing_gcc_compilation = 1;
+ else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
+ processing_gcc_compilation = 2;
+ if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
+ ++tempstring;
+ if (STREQN (tempstring, "__gnu_compiled", 14))
+ processing_gcc_compilation = 2;
+ }
+
+ /* Try to select a C++ demangling based on the compilation unit
+ producer. */
+
+ if (processing_gcc_compilation)
+ {
+ if (AUTO_DEMANGLING)
+ {
+ set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
+ }
+ }
+ }
+ else
+ {
+ /* The N_SO starting this symtab is the first symbol, so we
+ better not check the symbol before it. I'm not this can
+ happen, but it doesn't hurt to check for it. */
+ bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
+ processing_gcc_compilation = 0;
+ }
+
+ if (symbuf_idx == symbuf_end)
+ fill_symbuf (abfd);
+ bufp = &symbuf[symbuf_idx];
+ if (bfd_h_get_8 (abfd, bufp->e_type) != N_SO)
+ error("First symbol in segment of executable not a source symbol");
+
+ max_symnum = sym_size / symbol_size;
+
+ for (symnum = 0;
+ symnum < max_symnum;
+ symnum++)
+ {
+ QUIT; /* Allow this to be interruptable */
+ if (symbuf_idx == symbuf_end)
+ fill_symbuf(abfd);
+ bufp = &symbuf[symbuf_idx++];
+ INTERNALIZE_SYMBOL (nlist, bufp, abfd);
+ OBJSTAT (objfile, n_stabs++);
+
+ type = bfd_h_get_8 (abfd, bufp->e_type);
+
+ SET_NAMESTRING ();
+
+ if (type & N_STAB) {
+ process_one_symbol (type, nlist.n_desc, nlist.n_value,
+ namestring, section_offsets, objfile);
+ }
+ /* We skip checking for a new .o or -l file; that should never
+ happen in this routine. */
+ else if (type == N_TEXT)
+ {
+ /* I don't think this code will ever be executed, because
+ the GCC_COMPILED_FLAG_SYMBOL usually is right before
+ the N_SO symbol which starts this source file.
+ However, there is no reason not to accept
+ the GCC_COMPILED_FLAG_SYMBOL anywhere. */
+
+ if (STREQ (namestring, GCC_COMPILED_FLAG_SYMBOL))
+ processing_gcc_compilation = 1;
+ else if (STREQ (namestring, GCC2_COMPILED_FLAG_SYMBOL))
+ processing_gcc_compilation = 2;
+
+ if (AUTO_DEMANGLING)
+ {
+ set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
+ }
+ }
+ else if (type & N_EXT || type == (unsigned char)N_TEXT
+ || type == (unsigned char)N_NBTEXT
+ ) {
+ /* Global symbol: see if we came across a dbx defintion for
+ a corresponding symbol. If so, store the value. Remove
+ syms from the chain when their values are stored, but
+ search the whole chain, as there may be several syms from
+ different files with the same name. */
+ /* This is probably not true. Since the files will be read
+ in one at a time, each reference to a global symbol will
+ be satisfied in each file as it appears. So we skip this
+ section. */
+ ;
+ }
+ }
+
+ current_objfile = NULL;
+
+ /* In a Solaris elf file, this variable, which comes from the
+ value of the N_SO symbol, will still be 0. Luckily, text_offset,
+ which comes from pst->textlow is correct. */
+ if (last_source_start_addr == 0)
+ last_source_start_addr = text_offset;
+
+ /* In reordered executables last_source_start_addr may not be the
+ lower bound for this symtab, instead use text_offset which comes
+ from pst->textlow which is correct. */
+ if (last_source_start_addr > text_offset)
+ last_source_start_addr = text_offset;
+
+ pst->symtab = end_symtab (text_offset + text_size, objfile, SECT_OFF_TEXT);
+
+ /* Process items which we had to "process_later" due to dependancies
+ on other stabs. */
+ process_now (objfile);
+
+ end_stabs ();
+}
+
+
+/* This handles a single symbol from the symbol-file, building symbols
+ into a GDB symtab. It takes these arguments and an implicit argument.
+
+ TYPE is the type field of the ".stab" symbol entry.
+ DESC is the desc field of the ".stab" entry.
+ VALU is the value field of the ".stab" entry.
+ NAME is the symbol name, in our address space.
+ SECTION_OFFSETS is a set of amounts by which the sections of this object
+ file were relocated when it was loaded into memory.
+ All symbols that refer
+ to memory locations need to be offset by these amounts.
+ OBJFILE is the object file from which we are reading symbols.
+ It is used in end_symtab. */
+
+void
+process_one_symbol (type, desc, valu, name, section_offsets, objfile)
+ int type, desc;
+ CORE_ADDR valu;
+ char *name;
+ struct section_offsets *section_offsets;
+ struct objfile *objfile;
+{
+#ifdef SUN_FIXED_LBRAC_BUG
+ /* If SUN_FIXED_LBRAC_BUG is defined, then it tells us whether we need
+ to correct the address of N_LBRAC's. If it is not defined, then
+ we never need to correct the addresses. */
+
+ /* This records the last pc address we've seen. We depend on there being
+ an SLINE or FUN or SO before the first LBRAC, since the variable does
+ not get reset in between reads of different symbol files. */
+ static CORE_ADDR last_pc_address;
+#endif
+
+ register struct context_stack *new;
+ /* This remembers the address of the start of a function. It is used
+ because in Solaris 2, N_LBRAC, N_RBRAC, and N_SLINE entries are
+ relative to the current function's start address. On systems
+ other than Solaris 2, this just holds the SECT_OFF_TEXT value, and is
+ used to relocate these symbol types rather than SECTION_OFFSETS. */
+ static CORE_ADDR function_start_offset;
+
+ /* If this is nonzero, we've seen a non-gcc N_OPT symbol for this source
+ file. Used to detect the SunPRO solaris compiler. */
+ static int n_opt_found;
+
+ /* The stab type used for the definition of the last function.
+ N_STSYM or N_GSYM for SunOS4 acc; N_FUN for other compilers. */
+ static int function_stab_type = 0;
+
+ if (!block_address_function_relative)
+ /* N_LBRAC, N_RBRAC and N_SLINE entries are not relative to the
+ function start address, so just use the text offset. */
+ function_start_offset = ANOFFSET (section_offsets, SECT_OFF_TEXT);
+
+ /* Something is wrong if we see real data before
+ seeing a source file name. */
+
+ if (last_source_file == NULL && type != (unsigned char)N_SO)
+ {
+ /* Ignore any symbols which appear before an N_SO symbol.
+ Currently no one puts symbols there, but we should deal
+ gracefully with the case. A complain()t might be in order,
+ but this should not be an error (). */
+ return;
+ }
+
+ switch (type)
+ {
+ case N_FUN:
+ case N_FNAME:
+
+ if (*name == '\000')
+ {
+ /* This N_FUN marks the end of a function. This closes off the
+ current block. */
+ within_function = 0;
+ new = pop_context ();
+
+ /* Make a block for the local symbols within. */
+ finish_block (new->name, &local_symbols, new->old_blocks,
+ new->start_addr, new->start_addr + valu,
+ objfile);
+
+ /* May be switching to an assembler file which may not be using
+ block relative stabs, so reset the offset. */
+ if (block_address_function_relative)
+ function_start_offset = 0;
+
+ break;
+ }
+
+ /* Relocate for dynamic loading */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+#ifdef SMASH_TEXT_ADDRESS
+ SMASH_TEXT_ADDRESS (valu);
+#endif
+ goto define_a_symbol;
+
+ case N_LBRAC:
+ /* This "symbol" just indicates the start of an inner lexical
+ context within a function. */
+
+ /* Ignore extra outermost context from SunPRO cc and acc. */
+ if (n_opt_found && desc == 1)
+ break;
+
+ if (block_address_function_relative)
+ /* Relocate for Sun ELF acc fn-relative syms. */
+ valu += function_start_offset;
+ else
+ /* On most machines, the block addresses are relative to the
+ N_SO, the linker did not relocate them (sigh). */
+ valu += last_source_start_addr;
+
+#ifdef SUN_FIXED_LBRAC_BUG
+ if (!SUN_FIXED_LBRAC_BUG && valu < last_pc_address) {
+ /* Patch current LBRAC pc value to match last handy pc value */
+ complain (&lbrac_complaint);
+ valu = last_pc_address;
+ }
+#endif
+ new = push_context (desc, valu);
+ break;
+
+ case N_RBRAC:
+ /* This "symbol" just indicates the end of an inner lexical
+ context that was started with N_LBRAC. */
+
+ /* Ignore extra outermost context from SunPRO cc and acc. */
+ if (n_opt_found && desc == 1)
+ break;
+
+ if (block_address_function_relative)
+ /* Relocate for Sun ELF acc fn-relative syms. */
+ valu += function_start_offset;
+ else
+ /* On most machines, the block addresses are relative to the
+ N_SO, the linker did not relocate them (sigh). */
+ valu += last_source_start_addr;
+
+ new = pop_context();
+ if (desc != new->depth)
+ complain (&lbrac_mismatch_complaint, symnum);
+
+ /* Some compilers put the variable decls inside of an
+ LBRAC/RBRAC block. This macro should be nonzero if this
+ is true. DESC is N_DESC from the N_RBRAC symbol.
+ GCC_P is true if we've detected the GCC_COMPILED_SYMBOL
+ or the GCC2_COMPILED_SYMBOL. */
+#if !defined (VARIABLES_INSIDE_BLOCK)
+#define VARIABLES_INSIDE_BLOCK(desc, gcc_p) 0
+#endif
+
+ /* Can only use new->locals as local symbols here if we're in
+ gcc or on a machine that puts them before the lbrack. */
+ if (!VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
+ local_symbols = new->locals;
+
+ if (context_stack_depth
+ > !VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
+ {
+ /* This is not the outermost LBRAC...RBRAC pair in the function,
+ its local symbols preceded it, and are the ones just recovered
+ from the context stack. Define the block for them (but don't
+ bother if the block contains no symbols. Should we complain
+ on blocks without symbols? I can't think of any useful purpose
+ for them). */
+ if (local_symbols != NULL)
+ {
+ /* Muzzle a compiler bug that makes end < start. (which
+ compilers? Is this ever harmful?). */
+ if (new->start_addr > valu)
+ {
+ complain (&lbrac_rbrac_complaint);
+ new->start_addr = valu;
+ }
+ /* Make a block for the local symbols within. */
+ finish_block (0, &local_symbols, new->old_blocks,
+ new->start_addr, valu, objfile);
+ }
+ }
+ else
+ {
+ /* This is the outermost LBRAC...RBRAC pair. There is no
+ need to do anything; leave the symbols that preceded it
+ to be attached to the function's own block. We need to
+ indicate that we just moved outside of the function. */
+ within_function = 0;
+ }
+
+ if (VARIABLES_INSIDE_BLOCK(desc, processing_gcc_compilation))
+ /* Now pop locals of block just finished. */
+ local_symbols = new->locals;
+ break;
+
+ case N_FN:
+ case N_FN_SEQ:
+ /* This kind of symbol indicates the start of an object file. */
+ /* Relocate for dynamic loading */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ break;
+
+ case N_SO:
+ /* This type of symbol indicates the start of data
+ for one source file.
+ Finish the symbol table of the previous source file
+ (if any) and start accumulating a new symbol table. */
+ /* Relocate for dynamic loading */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+
+ n_opt_found = 0;
+
+#ifdef SUN_FIXED_LBRAC_BUG
+ last_pc_address = valu; /* Save for SunOS bug circumcision */
+#endif
+
+#ifdef PCC_SOL_BROKEN
+ /* pcc bug, occasionally puts out SO for SOL. */
+ if (context_stack_depth > 0)
+ {
+ start_subfile (name, NULL);
+ break;
+ }
+#endif
+ if (last_source_file)
+ {
+ /* Check if previous symbol was also an N_SO (with some
+ sanity checks). If so, that one was actually the directory
+ name, and the current one is the real file name.
+ Patch things up. */
+ if (previous_stab_code == (unsigned char) N_SO)
+ {
+ patch_subfile_names (current_subfile, name);
+ break; /* Ignore repeated SOs */
+ }
+ end_symtab (valu, objfile, SECT_OFF_TEXT);
+ end_stabs ();
+ }
+
+ /* Null name means this just marks the end of text for this .o file.
+ Don't start a new symtab in this case. */
+ if (*name == '\000')
+ break;
+
+ if (block_address_function_relative)
+ function_start_offset = 0;
+
+ start_stabs ();
+ start_symtab (name, NULL, valu);
+ record_debugformat ("stabs");
+ break;
+
+ case N_SOL:
+ /* This type of symbol indicates the start of data for
+ a sub-source-file, one whose contents were copied or
+ included in the compilation of the main source file
+ (whose name was given in the N_SO symbol.) */
+ /* Relocate for dynamic loading */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ start_subfile (name, current_subfile->dirname);
+ break;
+
+ case N_BINCL:
+ push_subfile ();
+ add_new_header_file (name, valu);
+ start_subfile (name, current_subfile->dirname);
+ break;
+
+ case N_EINCL:
+ start_subfile (pop_subfile (), current_subfile->dirname);
+ break;
+
+ case N_EXCL:
+ add_old_header_file (name, valu);
+ break;
+
+ case N_SLINE:
+ /* This type of "symbol" really just records
+ one line-number -- core-address correspondence.
+ Enter it in the line list for this symbol table. */
+
+ /* Relocate for dynamic loading and for ELF acc fn-relative syms. */
+ valu += function_start_offset;
+
+#ifdef SUN_FIXED_LBRAC_BUG
+ last_pc_address = valu; /* Save for SunOS bug circumcision */
+#endif
+ record_line (current_subfile, desc, valu);
+ break;
+
+ case N_BCOMM:
+ common_block_start (name, objfile);
+ break;
+
+ case N_ECOMM:
+ common_block_end (objfile);
+ break;
+
+ /* The following symbol types need to have the appropriate offset added
+ to their value; then we process symbol definitions in the name. */
+
+ case N_STSYM: /* Static symbol in data seg */
+ case N_LCSYM: /* Static symbol in BSS seg */
+ case N_ROSYM: /* Static symbol in Read-only data seg */
+ /* HORRID HACK DEPT. However, it's Sun's furgin' fault.
+ Solaris2's stabs-in-elf makes *most* symbols relative
+ but leaves a few absolute (at least for Solaris 2.1 and version
+ 2.0.1 of the SunPRO compiler). N_STSYM and friends sit on the fence.
+ .stab "foo:S...",N_STSYM is absolute (ld relocates it)
+ .stab "foo:V...",N_STSYM is relative (section base subtracted).
+ This leaves us no choice but to search for the 'S' or 'V'...
+ (or pass the whole section_offsets stuff down ONE MORE function
+ call level, which we really don't want to do). */
+ {
+ char *p;
+
+ /* .o files and NLMs have non-zero text seg offsets, but don't need
+ their static syms offset in this fashion. XXX - This is really a
+ crock that should be fixed in the solib handling code so that I
+ don't have to work around it here. */
+
+ if (!symfile_relocatable)
+ {
+ p = strchr (name, ':');
+ if (p != 0 && p[1] == 'S')
+ {
+ /* The linker relocated it. We don't want to add an
+ elfstab_offset_sections-type offset, but we *do* want
+ to add whatever solib.c passed to symbol_file_add as
+ addr (this is known to affect SunOS4, and I suspect ELF
+ too). Since elfstab_offset_sections currently does not
+ muck with the text offset (there is no Ttext.text
+ symbol), we can get addr from the text offset. If
+ elfstab_offset_sections ever starts dealing with the
+ text offset, and we still need to do this, we need to
+ invent a SECT_OFF_ADDR_KLUDGE or something. */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ goto define_a_symbol;
+ }
+ }
+ /* Since it's not the kludge case, re-dispatch to the right handler. */
+ switch (type) {
+ case N_STSYM: goto case_N_STSYM;
+ case N_LCSYM: goto case_N_LCSYM;
+ case N_ROSYM: goto case_N_ROSYM;
+ default: abort();
+ }
+ }
+
+ case_N_STSYM: /* Static symbol in data seg */
+ case N_DSLINE: /* Source line number, data seg */
+ valu += ANOFFSET (section_offsets, SECT_OFF_DATA);
+ goto define_a_symbol;
+
+ case_N_LCSYM: /* Static symbol in BSS seg */
+ case N_BSLINE: /* Source line number, bss seg */
+ /* N_BROWS: overlaps with N_BSLINE */
+ valu += ANOFFSET (section_offsets, SECT_OFF_BSS);
+ goto define_a_symbol;
+
+ case_N_ROSYM: /* Static symbol in Read-only data seg */
+ valu += ANOFFSET (section_offsets, SECT_OFF_RODATA);
+ goto define_a_symbol;
+
+ case N_ENTRY: /* Alternate entry point */
+ /* Relocate for dynamic loading */
+ valu += ANOFFSET (section_offsets, SECT_OFF_TEXT);
+ goto define_a_symbol;
+
+ /* The following symbol types we don't know how to process. Handle
+ them in a "default" way, but complain to people who care. */
+ default:
+ case N_CATCH: /* Exception handler catcher */
+ case N_EHDECL: /* Exception handler name */
+ case N_PC: /* Global symbol in Pascal */
+ case N_M2C: /* Modula-2 compilation unit */
+ /* N_MOD2: overlaps with N_EHDECL */
+ case N_SCOPE: /* Modula-2 scope information */
+ case N_ECOML: /* End common (local name) */
+ case N_NBTEXT: /* Gould Non-Base-Register symbols??? */
+ case N_NBDATA:
+ case N_NBBSS:
+ case N_NBSTS:
+ case N_NBLCS:
+ complain (&unknown_symtype_complaint, local_hex_string (type));
+ /* FALLTHROUGH */
+
+ /* The following symbol types don't need the address field relocated,
+ since it is either unused, or is absolute. */
+ define_a_symbol:
+ case N_GSYM: /* Global variable */
+ case N_NSYMS: /* Number of symbols (ultrix) */
+ case N_NOMAP: /* No map? (ultrix) */
+ case N_RSYM: /* Register variable */
+ case N_DEFD: /* Modula-2 GNU module dependency */
+ case N_SSYM: /* Struct or union element */
+ case N_LSYM: /* Local symbol in stack */
+ case N_PSYM: /* Parameter variable */
+ case N_LENG: /* Length of preceding symbol type */
+ if (name)
+ {
+ int deftype;
+ char *colon_pos = strchr (name, ':');
+ if (colon_pos == NULL)
+ deftype = '\0';
+ else
+ deftype = colon_pos[1];
+
+ switch (deftype)
+ {
+ case 'f':
+ case 'F':
+ function_stab_type = type;
+
+#ifdef SOFUN_ADDRESS_MAYBE_MISSING
+ /* Deal with the SunPRO 3.0 compiler which omits the address
+ from N_FUN symbols. */
+ if (type == N_FUN
+ && valu == ANOFFSET (section_offsets, SECT_OFF_TEXT))
+ {
+ struct minimal_symbol *msym;
+ char *p;
+ int n;
+
+ p = strchr (name, ':');
+ if (p == NULL)
+ p = name;
+ n = p - name;
+ p = alloca (n + 2);
+ strncpy (p, name, n);
+ p[n] = 0;
+
+ msym = lookup_minimal_symbol (p, last_source_file,
+ objfile);
+ if (msym == NULL)
+ {
+ /* Sun Fortran appends an underscore to the minimal
+ symbol name, try again with an appended underscore
+ if the minimal symbol was not found. */
+ p[n] = '_';
+ p[n + 1] = 0;
+ msym = lookup_minimal_symbol (p, last_source_file,
+ objfile);
+ }
+ if (msym)
+ valu = SYMBOL_VALUE_ADDRESS (msym);
+ }
+#endif
+
+#ifdef SUN_FIXED_LBRAC_BUG
+ /* The Sun acc compiler, under SunOS4, puts out
+ functions with N_GSYM or N_STSYM. The problem is
+ that the address of the symbol is no good (for N_GSYM
+ it doesn't even attept an address; for N_STSYM it
+ puts out an address but then it gets relocated
+ relative to the data segment, not the text segment).
+ Currently we can't fix this up later as we do for
+ some types of symbol in scan_file_globals.
+ Fortunately we do have a way of finding the address -
+ we know that the value in last_pc_address is either
+ the one we want (if we're dealing with the first
+ function in an object file), or somewhere in the
+ previous function. This means that we can use the
+ minimal symbol table to get the address. */
+
+ /* Starting with release 3.0, the Sun acc compiler,
+ under SunOS4, puts out functions with N_FUN and a value
+ of zero. This gets relocated to the start of the text
+ segment of the module, which is no good either.
+ Under SunOS4 we can deal with this as N_SLINE and N_SO
+ entries contain valid absolute addresses.
+ Release 3.0 acc also puts out N_OPT entries, which makes
+ it possible to discern acc from cc or gcc. */
+
+ if (type == N_GSYM || type == N_STSYM
+ || (type == N_FUN
+ && n_opt_found && !block_address_function_relative))
+ {
+ struct minimal_symbol *m;
+ int l = colon_pos - name;
+
+ m = lookup_minimal_symbol_by_pc (last_pc_address);
+ if (m && STREQN (SYMBOL_NAME (m), name, l)
+ && SYMBOL_NAME (m) [l] == '\0')
+ /* last_pc_address was in this function */
+ valu = SYMBOL_VALUE (m);
+ else if (m && SYMBOL_NAME (m+1)
+ && STREQN (SYMBOL_NAME (m+1), name, l)
+ && SYMBOL_NAME (m+1) [l] == '\0')
+ /* last_pc_address was in last function */
+ valu = SYMBOL_VALUE (m+1);
+ else
+ /* Not found - use last_pc_address (for finish_block) */
+ valu = last_pc_address;
+ }
+
+ last_pc_address = valu; /* Save for SunOS bug circumcision */
+#endif
+
+ if (block_address_function_relative)
+ /* For Solaris 2.0 compilers, the block addresses and
+ N_SLINE's are relative to the start of the
+ function. On normal systems, and when using gcc on
+ Solaris 2.0, these addresses are just absolute, or
+ relative to the N_SO, depending on
+ BLOCK_ADDRESS_ABSOLUTE. */
+ function_start_offset = valu;
+
+ within_function = 1;
+ if (context_stack_depth > 0)
+ {
+ new = pop_context ();
+ /* Make a block for the local symbols within. */
+ finish_block (new->name, &local_symbols, new->old_blocks,
+ new->start_addr, valu, objfile);
+ }
+ /* Stack must be empty now. */
+ if (context_stack_depth != 0)
+ complain (&lbrac_unmatched_complaint, symnum);
+
+ new = push_context (0, valu);
+ new->name = define_symbol (valu, name, desc, type, objfile);
+ break;
+
+ default:
+ define_symbol (valu, name, desc, type, objfile);
+ break;
+ }
+ }
+ break;
+
+ /* We use N_OPT to carry the gcc2_compiled flag. Sun uses it
+ for a bunch of other flags, too. Someday we may parse their
+ flags; for now we ignore theirs and hope they'll ignore ours. */
+ case N_OPT: /* Solaris 2: Compiler options */
+ if (name)
+ {
+ if (STREQ (name, GCC2_COMPILED_FLAG_SYMBOL))
+ {
+ processing_gcc_compilation = 2;
+#if 1 /* Works, but is experimental. -fnf */
+ if (AUTO_DEMANGLING)
+ {
+ set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
+ }
+#endif
+ }
+ else
+ n_opt_found = 1;
+ }
+ break;
+
+ /* The following symbol types can be ignored. */
+ case N_OBJ: /* Solaris 2: Object file dir and name */
+ /* N_UNDF: Solaris 2: file separator mark */
+ /* N_UNDF: -- we will never encounter it, since we only process one
+ file's symbols at once. */
+ case N_ENDM: /* Solaris 2: End of module */
+ case N_MAIN: /* Name of main routine. */
+ case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
+ break;
+ }
+
+ /* '#' is a GNU C extension to allow one symbol to refer to another
+ related symbol.
+
+ Generally this is used so that an alias can refer to its main
+ symbol. */
+ if (name[0] == '#')
+ {
+ /* Initialize symbol reference names and determine if this is
+ a definition. If symbol reference is being defined, go
+ ahead and add it. Otherwise, just return sym. */
+
+ char *s = name;
+ int refnum;
+
+ /* If this stab defines a new reference ID that is not on the
+ reference list, then put it on the reference list.
+
+ We go ahead and advance NAME past the reference, even though
+ it is not strictly necessary at this time. */
+ refnum = symbol_reference_defined (&s);
+ if (refnum >= 0)
+ if (!ref_search (refnum))
+ ref_add (refnum, 0, name, valu);
+ name = s;
+ }
+
+
+ previous_stab_code = type;
+}
+
+/* FIXME: The only difference between this and elfstab_build_psymtabs
+ is the call to install_minimal_symbols for elf, and the support for
+ split sections. If the differences are really that small, the code
+ should be shared. */
+
+/* Scan and build partial symbols for an coff symbol file.
+ The coff file has already been processed to get its minimal symbols.
+
+ This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
+ rolled into one.
+
+ OBJFILE is the object file we are reading symbols from.
+ ADDR is the address relative to which the symbols are (e.g.
+ the base address of the text segment).
+ MAINLINE is true if we are reading the main symbol
+ table (as opposed to a shared lib or dynamically loaded file).
+ TEXTADDR is the address of the text section.
+ TEXTSIZE is the size of the text section.
+ STABSECTS is the list of .stab sections in OBJFILE.
+ STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
+ .stabstr section exists.
+
+ This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
+ adjusted for coff details. */
+
+void
+coffstab_build_psymtabs (objfile, section_offsets, mainline,
+ textaddr, textsize, stabsects,
+ stabstroffset, stabstrsize)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline;
+ CORE_ADDR textaddr;
+ unsigned int textsize;
+ struct stab_section_list *stabsects;
+ file_ptr stabstroffset;
+ unsigned int stabstrsize;
+{
+ int val;
+ bfd *sym_bfd = objfile->obfd;
+ char *name = bfd_get_filename (sym_bfd);
+ struct dbx_symfile_info *info;
+ unsigned int stabsize;
+
+ /* There is already a dbx_symfile_info allocated by our caller.
+ It might even contain some info from the coff symtab to help us. */
+ info = objfile->sym_stab_info;
+
+ DBX_TEXT_ADDR (objfile) = textaddr;
+ DBX_TEXT_SIZE (objfile) = textsize;
+
+#define COFF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
+ DBX_SYMBOL_SIZE (objfile) = COFF_STABS_SYMBOL_SIZE;
+ DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
+
+ if (stabstrsize > bfd_get_size (sym_bfd))
+ error ("ridiculous string table size: %d bytes", stabstrsize);
+ DBX_STRINGTAB (objfile) = (char *)
+ obstack_alloc (&objfile->psymbol_obstack, stabstrsize+1);
+ OBJSTAT (objfile, sz_strtab += stabstrsize+1);
+
+ /* Now read in the string table in one big gulp. */
+
+ val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
+ if (val < 0)
+ perror_with_name (name);
+ val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd);
+ if (val != stabstrsize)
+ perror_with_name (name);
+
+ stabsread_new_init ();
+ buildsym_new_init ();
+ free_header_files ();
+ init_header_files ();
+
+ processing_acc_compilation = 1;
+
+ /* In a coff file, we've already installed the minimal symbols that came
+ from the coff (non-stab) symbol table, so always act like an
+ incremental load here. */
+ if (stabsects->next == NULL)
+ {
+ stabsize = bfd_section_size (sym_bfd, stabsects->section);
+ DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
+ DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
+ }
+ else
+ {
+ struct stab_section_list *stabsect;
+
+ DBX_SYMCOUNT (objfile) = 0;
+ for (stabsect = stabsects; stabsect != NULL; stabsect = stabsect->next)
+ {
+ stabsize = bfd_section_size (sym_bfd, stabsect->section);
+ DBX_SYMCOUNT (objfile) += stabsize / DBX_SYMBOL_SIZE (objfile);
+ }
+
+ DBX_SYMTAB_OFFSET (objfile) = stabsects->section->filepos;
+
+ symbuf_sections = stabsects->next;
+ symbuf_left = bfd_section_size (sym_bfd, stabsects->section);
+ symbuf_read = 0;
+ }
+
+ dbx_symfile_read (objfile, section_offsets, 0);
+}
+
+/* Scan and build partial symbols for an ELF symbol file.
+ This ELF file has already been processed to get its minimal symbols,
+ and any DWARF symbols that were in it.
+
+ This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
+ rolled into one.
+
+ OBJFILE is the object file we are reading symbols from.
+ ADDR is the address relative to which the symbols are (e.g.
+ the base address of the text segment).
+ MAINLINE is true if we are reading the main symbol
+ table (as opposed to a shared lib or dynamically loaded file).
+ STABOFFSET and STABSIZE define the location in OBJFILE where the .stab
+ section exists.
+ STABSTROFFSET and STABSTRSIZE define the location in OBJFILE where the
+ .stabstr section exists.
+
+ This routine is mostly copied from dbx_symfile_init and dbx_symfile_read,
+ adjusted for elf details. */
+
+void
+elfstab_build_psymtabs (objfile, section_offsets, mainline,
+ staboffset, stabsize,
+ stabstroffset, stabstrsize)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline;
+ file_ptr staboffset;
+ unsigned int stabsize;
+ file_ptr stabstroffset;
+ unsigned int stabstrsize;
+{
+ int val;
+ bfd *sym_bfd = objfile->obfd;
+ char *name = bfd_get_filename (sym_bfd);
+ struct dbx_symfile_info *info;
+ asection *text_sect;
+
+ /* There is already a dbx_symfile_info allocated by our caller.
+ It might even contain some info from the ELF symtab to help us. */
+ info = objfile->sym_stab_info;
+
+ text_sect = bfd_get_section_by_name (sym_bfd, ".text");
+ if (!text_sect)
+ error ("Can't find .text section in symbol file");
+ DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
+ DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
+
+#define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
+ DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
+ DBX_SYMCOUNT (objfile) = stabsize / DBX_SYMBOL_SIZE (objfile);
+ DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
+ DBX_SYMTAB_OFFSET (objfile) = staboffset;
+
+ if (stabstrsize > bfd_get_size (sym_bfd))
+ error ("ridiculous string table size: %d bytes", stabstrsize);
+ DBX_STRINGTAB (objfile) = (char *)
+ obstack_alloc (&objfile->psymbol_obstack, stabstrsize+1);
+ OBJSTAT (objfile, sz_strtab += stabstrsize+1);
+
+ /* Now read in the string table in one big gulp. */
+
+ val = bfd_seek (sym_bfd, stabstroffset, SEEK_SET);
+ if (val < 0)
+ perror_with_name (name);
+ val = bfd_read (DBX_STRINGTAB (objfile), stabstrsize, 1, sym_bfd);
+ if (val != stabstrsize)
+ perror_with_name (name);
+
+ stabsread_new_init ();
+ buildsym_new_init ();
+ free_header_files ();
+ init_header_files ();
+ install_minimal_symbols (objfile);
+
+ processing_acc_compilation = 1;
+
+ /* In an elf file, we've already installed the minimal symbols that came
+ from the elf (non-stab) symbol table, so always act like an
+ incremental load here. */
+ dbx_symfile_read (objfile, section_offsets, 0);
+}
+
+/* Scan and build partial symbols for a file with special sections for stabs
+ and stabstrings. The file has already been processed to get its minimal
+ symbols, and any other symbols that might be necessary to resolve GSYMs.
+
+ This routine is the equivalent of dbx_symfile_init and dbx_symfile_read
+ rolled into one.
+
+ OBJFILE is the object file we are reading symbols from.
+ ADDR is the address relative to which the symbols are (e.g. the base address
+ of the text segment).
+ MAINLINE is true if we are reading the main symbol table (as opposed to a
+ shared lib or dynamically loaded file).
+ STAB_NAME is the name of the section that contains the stabs.
+ STABSTR_NAME is the name of the section that contains the stab strings.
+
+ This routine is mostly copied from dbx_symfile_init and dbx_symfile_read. */
+
+void
+stabsect_build_psymtabs (objfile, section_offsets, mainline, stab_name,
+ stabstr_name, text_name)
+ struct objfile *objfile;
+ struct section_offsets *section_offsets;
+ int mainline;
+ char *stab_name;
+ char *stabstr_name;
+ char *text_name;
+{
+ int val;
+ bfd *sym_bfd = objfile->obfd;
+ char *name = bfd_get_filename (sym_bfd);
+ asection *stabsect;
+ asection *stabstrsect;
+ asection *text_sect;
+
+ stabsect = bfd_get_section_by_name (sym_bfd, stab_name);
+ stabstrsect = bfd_get_section_by_name (sym_bfd, stabstr_name);
+
+ if (!stabsect)
+ return;
+
+ if (!stabstrsect)
+ error ("stabsect_build_psymtabs: Found stabs (%s), but not string section (%s)",
+ stab_name, stabstr_name);
+
+ objfile->sym_stab_info = (struct dbx_symfile_info *)
+ xmalloc (sizeof (struct dbx_symfile_info));
+ memset (objfile->sym_stab_info, 0, sizeof (struct dbx_symfile_info));
+
+ text_sect = bfd_get_section_by_name (sym_bfd, text_name);
+ if (!text_sect)
+ error ("Can't find %s section in symbol file", text_name);
+ DBX_TEXT_ADDR (objfile) = bfd_section_vma (sym_bfd, text_sect);
+ DBX_TEXT_SIZE (objfile) = bfd_section_size (sym_bfd, text_sect);
+
+ DBX_SYMBOL_SIZE (objfile) = sizeof (struct external_nlist);
+ DBX_SYMCOUNT (objfile) = bfd_section_size (sym_bfd, stabsect)
+ / DBX_SYMBOL_SIZE (objfile);
+ DBX_STRINGTAB_SIZE (objfile) = bfd_section_size (sym_bfd, stabstrsect);
+ DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos; /* XXX - FIXME: POKING INSIDE BFD DATA STRUCTURES */
+
+ if (DBX_STRINGTAB_SIZE (objfile) > bfd_get_size (sym_bfd))
+ error ("ridiculous string table size: %d bytes", DBX_STRINGTAB_SIZE (objfile));
+ DBX_STRINGTAB (objfile) = (char *)
+ obstack_alloc (&objfile->psymbol_obstack, DBX_STRINGTAB_SIZE (objfile) + 1);
+ OBJSTAT (objfile, sz_strtab += DBX_STRINGTAB_SIZE (objfile) + 1);
+
+ /* Now read in the string table in one big gulp. */
+
+ val = bfd_get_section_contents (sym_bfd, /* bfd */
+ stabstrsect, /* bfd section */
+ DBX_STRINGTAB (objfile), /* input buffer */
+ 0, /* offset into section */
+ DBX_STRINGTAB_SIZE (objfile)); /* amount to read */
+
+ if (!val)
+ perror_with_name (name);
+
+ stabsread_new_init ();
+ buildsym_new_init ();
+ free_header_files ();
+ init_header_files ();
+ install_minimal_symbols (objfile);
+
+ /* Now, do an incremental load */
+
+ processing_acc_compilation = 1;
+ dbx_symfile_read (objfile, section_offsets, 0);
+}
+
+static struct sym_fns aout_sym_fns =
+{
+ bfd_target_aout_flavour,
+ dbx_new_init, /* sym_new_init: init anything gbl to entire symtab */
+ dbx_symfile_init, /* sym_init: read initial info, setup for sym_read() */
+ dbx_symfile_read, /* sym_read: read a symbol file into symtab */
+ dbx_symfile_finish, /* sym_finish: finished with file, cleanup */
+ default_symfile_offsets,
+ /* sym_offsets: parse user's offsets to internal form */
+ NULL /* next: pointer to next struct sym_fns */
+};
+
+void
+_initialize_dbxread ()
+{
+ add_symtab_fns(&aout_sym_fns);
+}