3600 lines
111 KiB
C
3600 lines
111 KiB
C
/* Read dbx symbol tables and convert to internal format, for GDB.
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Copyright (C) 1986-2004, 2008-2012 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This module provides three functions: dbx_symfile_init,
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which initializes to read a symbol file; dbx_new_init, which
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discards existing cached information when all symbols are being
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discarded; and dbx_symfile_read, which reads a symbol table
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from a file.
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dbx_symfile_read only does the minimum work necessary for letting the
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user "name" things symbolically; it does not read the entire symtab.
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Instead, it reads the external and static symbols and puts them in partial
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symbol tables. When more extensive information is requested of a
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file, the corresponding partial symbol table is mutated into a full
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fledged symbol table by going back and reading the symbols
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for real. dbx_psymtab_to_symtab() is the function that does this */
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#include "defs.h"
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#include "gdb_string.h"
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#if defined(__CYGNUSCLIB__)
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#include <sys/types.h>
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#include <fcntl.h>
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#endif
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#include "gdb_obstack.h"
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#include "gdb_stat.h"
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#include "symtab.h"
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#include "breakpoint.h"
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#include "target.h"
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#include "gdbcore.h" /* for bfd stuff */
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#include "libaout.h" /* FIXME Secret internal BFD stuff for a.out */
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#include "filenames.h"
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#include "objfiles.h"
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#include "buildsym.h"
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#include "stabsread.h"
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#include "gdb-stabs.h"
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#include "demangle.h"
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#include "complaints.h"
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#include "cp-abi.h"
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#include "cp-support.h"
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#include "psympriv.h"
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#include "gdb_assert.h"
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#include "gdb_string.h"
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#include "aout/aout64.h"
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#include "aout/stab_gnu.h" /* We always use GNU stabs, not
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native, now. */
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/* We put a pointer to this structure in the read_symtab_private field
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of the psymtab. */
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struct symloc
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{
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/* Offset within the file symbol table of first local symbol for this
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file. */
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int ldsymoff;
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/* Length (in bytes) of the section of the symbol table devoted to
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this file's symbols (actually, the section bracketed may contain
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more than just this file's symbols). If ldsymlen is 0, the only
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reason for this thing's existence is the dependency list. Nothing
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else will happen when it is read in. */
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int ldsymlen;
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/* The size of each symbol in the symbol file (in external form). */
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int symbol_size;
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/* Further information needed to locate the symbols if they are in
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an ELF file. */
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int symbol_offset;
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int string_offset;
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int file_string_offset;
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};
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#define LDSYMOFF(p) (((struct symloc *)((p)->read_symtab_private))->ldsymoff)
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#define LDSYMLEN(p) (((struct symloc *)((p)->read_symtab_private))->ldsymlen)
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#define SYMLOC(p) ((struct symloc *)((p)->read_symtab_private))
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#define SYMBOL_SIZE(p) (SYMLOC(p)->symbol_size)
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#define SYMBOL_OFFSET(p) (SYMLOC(p)->symbol_offset)
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#define STRING_OFFSET(p) (SYMLOC(p)->string_offset)
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#define FILE_STRING_OFFSET(p) (SYMLOC(p)->file_string_offset)
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/* The objfile we are currently reading. */
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static struct objfile *dbxread_objfile;
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/* Remember what we deduced to be the source language of this psymtab. */
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static enum language psymtab_language = language_unknown;
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/* The BFD for this file -- implicit parameter to next_symbol_text. */
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static bfd *symfile_bfd;
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/* The size of each symbol in the symbol file (in external form).
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This is set by dbx_symfile_read when building psymtabs, and by
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dbx_psymtab_to_symtab when building symtabs. */
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static unsigned symbol_size;
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/* This is the offset of the symbol table in the executable file. */
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static unsigned symbol_table_offset;
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/* This is the offset of the string table in the executable file. */
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static unsigned string_table_offset;
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/* For elf+stab executables, the n_strx field is not a simple index
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into the string table. Instead, each .o file has a base offset in
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the string table, and the associated symbols contain offsets from
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this base. The following two variables contain the base offset for
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the current and next .o files. */
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static unsigned int file_string_table_offset;
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static unsigned int next_file_string_table_offset;
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/* .o and NLM files contain unrelocated addresses which are based at
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0. When non-zero, this flag disables some of the special cases for
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Solaris elf+stab text addresses at location 0. */
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static int symfile_relocatable = 0;
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/* If this is nonzero, N_LBRAC, N_RBRAC, and N_SLINE entries are
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relative to the function start address. */
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static int block_address_function_relative = 0;
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/* The lowest text address we have yet encountered. This is needed
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because in an a.out file, there is no header field which tells us
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what address the program is actually going to be loaded at, so we
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need to make guesses based on the symbols (which *are* relocated to
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reflect the address it will be loaded at). */
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static CORE_ADDR lowest_text_address;
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/* Non-zero if there is any line number info in the objfile. Prevents
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end_psymtab from discarding an otherwise empty psymtab. */
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static int has_line_numbers;
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/* Complaints about the symbols we have encountered. */
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static void
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unknown_symtype_complaint (const char *arg1)
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{
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complaint (&symfile_complaints, _("unknown symbol type %s"), arg1);
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}
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static void
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lbrac_mismatch_complaint (int arg1)
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{
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complaint (&symfile_complaints,
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_("N_LBRAC/N_RBRAC symbol mismatch at symtab pos %d"), arg1);
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}
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static void
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repeated_header_complaint (const char *arg1, int arg2)
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{
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complaint (&symfile_complaints,
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_("\"repeated\" header file %s not "
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"previously seen, at symtab pos %d"),
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arg1, arg2);
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}
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/* find_text_range --- find start and end of loadable code sections
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The find_text_range function finds the shortest address range that
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encloses all sections containing executable code, and stores it in
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objfile's text_addr and text_size members.
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dbx_symfile_read will use this to finish off the partial symbol
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table, in some cases. */
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static void
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find_text_range (bfd * sym_bfd, struct objfile *objfile)
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{
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asection *sec;
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int found_any = 0;
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CORE_ADDR start = 0;
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CORE_ADDR end = 0;
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for (sec = sym_bfd->sections; sec; sec = sec->next)
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if (bfd_get_section_flags (sym_bfd, sec) & SEC_CODE)
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{
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CORE_ADDR sec_start = bfd_section_vma (sym_bfd, sec);
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CORE_ADDR sec_end = sec_start + bfd_section_size (sym_bfd, sec);
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if (found_any)
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{
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if (sec_start < start)
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start = sec_start;
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if (sec_end > end)
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end = sec_end;
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}
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else
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{
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start = sec_start;
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end = sec_end;
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}
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found_any = 1;
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}
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if (!found_any)
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error (_("Can't find any code sections in symbol file"));
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DBX_TEXT_ADDR (objfile) = start;
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DBX_TEXT_SIZE (objfile) = end - start;
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}
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/* During initial symbol readin, we need to have a structure to keep
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track of which psymtabs have which bincls in them. This structure
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is used during readin to setup the list of dependencies within each
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partial symbol table. */
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struct header_file_location
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{
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char *name; /* Name of header file */
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int instance; /* See above */
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struct partial_symtab *pst; /* Partial symtab that has the
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BINCL/EINCL defs for this file. */
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};
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/* The actual list and controling variables. */
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static struct header_file_location *bincl_list, *next_bincl;
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static int bincls_allocated;
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/* Local function prototypes. */
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extern void _initialize_dbxread (void);
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static void read_ofile_symtab (struct partial_symtab *);
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static void dbx_psymtab_to_symtab (struct partial_symtab *);
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static void dbx_psymtab_to_symtab_1 (struct partial_symtab *);
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static void read_dbx_dynamic_symtab (struct objfile *objfile);
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static void read_dbx_symtab (struct objfile *);
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static void free_bincl_list (struct objfile *);
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static struct partial_symtab *find_corresponding_bincl_psymtab (char *, int);
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static void add_bincl_to_list (struct partial_symtab *, char *, int);
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static void init_bincl_list (int, struct objfile *);
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static char *dbx_next_symbol_text (struct objfile *);
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static void fill_symbuf (bfd *);
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static void dbx_symfile_init (struct objfile *);
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static void dbx_new_init (struct objfile *);
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static void dbx_symfile_read (struct objfile *, int);
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static void dbx_symfile_finish (struct objfile *);
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static void record_minimal_symbol (char *, CORE_ADDR, int, struct objfile *);
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static void add_new_header_file (char *, int);
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static void add_old_header_file (char *, int);
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static void add_this_object_header_file (int);
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static struct partial_symtab *start_psymtab (struct objfile *, char *,
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CORE_ADDR, int,
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struct partial_symbol **,
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struct partial_symbol **);
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/* Free up old header file tables. */
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void
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free_header_files (void)
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{
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if (this_object_header_files)
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{
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xfree (this_object_header_files);
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this_object_header_files = NULL;
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}
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n_allocated_this_object_header_files = 0;
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}
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/* Allocate new header file tables. */
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void
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init_header_files (void)
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{
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n_allocated_this_object_header_files = 10;
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this_object_header_files = (int *) xmalloc (10 * sizeof (int));
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}
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/* Add header file number I for this object file
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at the next successive FILENUM. */
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static void
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add_this_object_header_file (int i)
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{
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if (n_this_object_header_files == n_allocated_this_object_header_files)
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{
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n_allocated_this_object_header_files *= 2;
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this_object_header_files
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= (int *) xrealloc ((char *) this_object_header_files,
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n_allocated_this_object_header_files * sizeof (int));
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}
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this_object_header_files[n_this_object_header_files++] = i;
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}
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/* Add to this file an "old" header file, one already seen in
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a previous object file. NAME is the header file's name.
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INSTANCE is its instance code, to select among multiple
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symbol tables for the same header file. */
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static void
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add_old_header_file (char *name, int instance)
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{
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struct header_file *p = HEADER_FILES (dbxread_objfile);
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int i;
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for (i = 0; i < N_HEADER_FILES (dbxread_objfile); i++)
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if (filename_cmp (p[i].name, name) == 0 && instance == p[i].instance)
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{
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add_this_object_header_file (i);
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return;
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}
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repeated_header_complaint (name, symnum);
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}
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/* Add to this file a "new" header file: definitions for its types follow.
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NAME is the header file's name.
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Most often this happens only once for each distinct header file,
|
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but not necessarily. If it happens more than once, INSTANCE has
|
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a different value each time, and references to the header file
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use INSTANCE values to select among them.
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dbx output contains "begin" and "end" markers for each new header file,
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but at this level we just need to know which files there have been;
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so we record the file when its "begin" is seen and ignore the "end". */
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static void
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add_new_header_file (char *name, int instance)
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{
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int i;
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struct header_file *hfile;
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/* Make sure there is room for one more header file. */
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i = N_ALLOCATED_HEADER_FILES (dbxread_objfile);
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if (N_HEADER_FILES (dbxread_objfile) == i)
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{
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||
if (i == 0)
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{
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N_ALLOCATED_HEADER_FILES (dbxread_objfile) = 10;
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HEADER_FILES (dbxread_objfile) = (struct header_file *)
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xmalloc (10 * sizeof (struct header_file));
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}
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else
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{
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i *= 2;
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N_ALLOCATED_HEADER_FILES (dbxread_objfile) = i;
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HEADER_FILES (dbxread_objfile) = (struct header_file *)
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xrealloc ((char *) HEADER_FILES (dbxread_objfile),
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(i * sizeof (struct header_file)));
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}
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}
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/* Create an entry for this header file. */
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i = N_HEADER_FILES (dbxread_objfile)++;
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hfile = HEADER_FILES (dbxread_objfile) + i;
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hfile->name = xstrdup (name);
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hfile->instance = instance;
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hfile->length = 10;
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hfile->vector
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= (struct type **) xmalloc (10 * sizeof (struct type *));
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memset (hfile->vector, 0, 10 * sizeof (struct type *));
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add_this_object_header_file (i);
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}
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#if 0
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static struct type **
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explicit_lookup_type (int real_filenum, int index)
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||
{
|
||
struct header_file *f = &HEADER_FILES (dbxread_objfile)[real_filenum];
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||
if (index >= f->length)
|
||
{
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f->length *= 2;
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f->vector = (struct type **)
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xrealloc (f->vector, f->length * sizeof (struct type *));
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||
memset (&f->vector[f->length / 2],
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'\0', f->length * sizeof (struct type *) / 2);
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||
}
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||
return &f->vector[index];
|
||
}
|
||
#endif
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||
|
||
static void
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||
record_minimal_symbol (char *name, CORE_ADDR address, int type,
|
||
struct objfile *objfile)
|
||
{
|
||
enum minimal_symbol_type ms_type;
|
||
int section;
|
||
asection *bfd_section;
|
||
|
||
switch (type)
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||
{
|
||
case N_TEXT | N_EXT:
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||
ms_type = mst_text;
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||
section = SECT_OFF_TEXT (objfile);
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||
bfd_section = DBX_TEXT_SECTION (objfile);
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||
break;
|
||
case N_DATA | N_EXT:
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||
ms_type = mst_data;
|
||
section = SECT_OFF_DATA (objfile);
|
||
bfd_section = DBX_DATA_SECTION (objfile);
|
||
break;
|
||
case N_BSS | N_EXT:
|
||
ms_type = mst_bss;
|
||
section = SECT_OFF_BSS (objfile);
|
||
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 (objfile);
|
||
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 (objfile);
|
||
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 (objfile);
|
||
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' && strcmp ("__DYNAMIC", name) == 0)
|
||
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 (is_vtable_name (tempstring))
|
||
ms_type = mst_data;
|
||
}
|
||
section = SECT_OFF_DATA (objfile);
|
||
bfd_section = DBX_DATA_SECTION (objfile);
|
||
break;
|
||
case N_BSS:
|
||
ms_type = mst_file_bss;
|
||
section = SECT_OFF_BSS (objfile);
|
||
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, 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. */
|
||
|
||
static void
|
||
dbx_symfile_read (struct objfile *objfile, int symfile_flags)
|
||
{
|
||
bfd *sym_bfd;
|
||
int val;
|
||
struct cleanup *back_to;
|
||
|
||
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), "epoc-pe", 7))
|
||
|| (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);
|
||
|
||
/* Size the symbol table. */
|
||
if (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 (really_free_pendings, 0);
|
||
|
||
init_minimal_symbol_collection ();
|
||
make_cleanup_discard_minimal_symbols ();
|
||
|
||
/* Read stabs data from executable file and define symbols. */
|
||
|
||
read_dbx_symtab (objfile);
|
||
|
||
/* Add the dynamic symbols. */
|
||
|
||
read_dbx_dynamic_symtab (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 (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 (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->deprecated_sym_stab_info = (struct dbx_symfile_info *)
|
||
xmalloc (sizeof (struct dbx_symfile_info));
|
||
memset (objfile->deprecated_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 objfile_obstack.
|
||
When we blow away the objfile 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 objfile_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 (size_temp, 0, sizeof (size_temp));
|
||
val = bfd_bread (size_temp, sizeof (size_temp), 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->objfile_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_bread (DBX_STRINGTAB (objfile),
|
||
DBX_STRINGTAB_SIZE (objfile),
|
||
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 (struct objfile *objfile)
|
||
{
|
||
if (objfile->deprecated_sym_stab_info != NULL)
|
||
{
|
||
if (HEADER_FILES (objfile) != NULL)
|
||
{
|
||
int i = N_HEADER_FILES (objfile);
|
||
struct header_file *hfiles = HEADER_FILES (objfile);
|
||
|
||
while (--i >= 0)
|
||
{
|
||
xfree (hfiles[i].name);
|
||
xfree (hfiles[i].vector);
|
||
}
|
||
xfree (hfiles);
|
||
}
|
||
xfree (objfile->deprecated_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;
|
||
|
||
/* 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;
|
||
|
||
/* This variable stores a global stabs buffer, if we read stabs into
|
||
memory in one chunk in order to process relocations. */
|
||
static bfd_byte *stabs_data;
|
||
|
||
/* 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 (bfd *sym_bfd)
|
||
{
|
||
unsigned int count;
|
||
int nbytes;
|
||
|
||
if (stabs_data)
|
||
{
|
||
nbytes = sizeof (symbuf);
|
||
if (nbytes > symbuf_left)
|
||
nbytes = symbuf_left;
|
||
memcpy (symbuf, stabs_data + symbuf_read, nbytes);
|
||
}
|
||
else if (symbuf_sections == NULL)
|
||
{
|
||
count = sizeof (symbuf);
|
||
nbytes = bfd_bread (symbuf, count, sym_bfd);
|
||
}
|
||
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_bread (symbuf, count, 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;
|
||
}
|
||
|
||
static void
|
||
stabs_seek (int sym_offset)
|
||
{
|
||
if (stabs_data)
|
||
{
|
||
symbuf_read += sym_offset;
|
||
symbuf_left -= sym_offset;
|
||
}
|
||
else
|
||
bfd_seek (symfile_bfd, sym_offset, SEEK_CUR);
|
||
}
|
||
|
||
#define INTERNALIZE_SYMBOL(intern, extern, abfd) \
|
||
{ \
|
||
(intern).n_strx = bfd_h_get_32 (abfd, (extern)->e_strx); \
|
||
(intern).n_type = bfd_h_get_8 (abfd, (extern)->e_type); \
|
||
(intern).n_other = 0; \
|
||
(intern).n_desc = bfd_h_get_16 (abfd, (extern)->e_desc); \
|
||
if (bfd_get_sign_extend_vma (abfd)) \
|
||
(intern).n_value = bfd_h_get_signed_32 (abfd, (extern)->e_value); \
|
||
else \
|
||
(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 (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 (int number, struct objfile *objfile)
|
||
{
|
||
bincls_allocated = number;
|
||
next_bincl = bincl_list = (struct header_file_location *)
|
||
xmalloc (bincls_allocated * sizeof (struct header_file_location));
|
||
}
|
||
|
||
/* Add a bincl to the list. */
|
||
|
||
static void
|
||
add_bincl_to_list (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 *)
|
||
xrealloc ((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 (char *name, int instance)
|
||
{
|
||
struct header_file_location *bincl;
|
||
|
||
for (bincl = bincl_list; bincl < next_bincl; bincl++)
|
||
if (bincl->instance == instance
|
||
&& strcmp (name, bincl->name) == 0)
|
||
return bincl->pst;
|
||
|
||
repeated_header_complaint (name, symnum);
|
||
return (struct partial_symtab *) 0;
|
||
}
|
||
|
||
/* Free the storage allocated for the bincl list. */
|
||
|
||
static void
|
||
free_bincl_list (struct objfile *objfile)
|
||
{
|
||
xfree (bincl_list);
|
||
bincls_allocated = 0;
|
||
}
|
||
|
||
static void
|
||
do_free_bincl_list_cleanup (void *objfile)
|
||
{
|
||
free_bincl_list (objfile);
|
||
}
|
||
|
||
static struct cleanup *
|
||
make_cleanup_free_bincl_list (struct objfile *objfile)
|
||
{
|
||
return make_cleanup (do_free_bincl_list_cleanup, objfile);
|
||
}
|
||
|
||
/* 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. */
|
||
|
||
static char *
|
||
set_namestring (struct objfile *objfile, const struct internal_nlist *nlist)
|
||
{
|
||
char *namestring;
|
||
|
||
if (nlist->n_strx + file_string_table_offset
|
||
>= DBX_STRINGTAB_SIZE (objfile)
|
||
|| nlist->n_strx + file_string_table_offset < nlist->n_strx)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
_("bad string table offset in symbol %d"),
|
||
symnum);
|
||
namestring = "<bad string table offset>";
|
||
}
|
||
else
|
||
namestring = (nlist->n_strx + file_string_table_offset
|
||
+ DBX_STRINGTAB (objfile));
|
||
return namestring;
|
||
}
|
||
|
||
/* Scan a SunOs dynamic symbol table for symbols of interest and
|
||
add them to the minimal symbol table. */
|
||
|
||
static void
|
||
read_dbx_dynamic_symtab (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 (xfree, 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 (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
type = N_TEXT;
|
||
}
|
||
else if (bfd_get_section_flags (abfd, sec) & SEC_DATA)
|
||
{
|
||
sym_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_DATA (objfile));
|
||
type = N_DATA;
|
||
}
|
||
else if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
|
||
{
|
||
sym_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_BSS (objfile));
|
||
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 (xfree, 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 (objfile->section_offsets,
|
||
SECT_OFF_DATA (objfile));
|
||
|
||
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);
|
||
}
|
||
|
||
static CORE_ADDR
|
||
find_stab_function_addr (char *namestring, const char *filename,
|
||
struct objfile *objfile)
|
||
{
|
||
struct minimal_symbol *msym;
|
||
char *p;
|
||
int n;
|
||
|
||
p = strchr (namestring, ':');
|
||
if (p == NULL)
|
||
p = namestring;
|
||
n = p - namestring;
|
||
p = alloca (n + 2);
|
||
strncpy (p, namestring, n);
|
||
p[n] = 0;
|
||
|
||
msym = lookup_minimal_symbol (p, filename, 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, filename, objfile);
|
||
}
|
||
|
||
if (msym == NULL && filename != NULL)
|
||
{
|
||
/* Try again without the filename. */
|
||
p[n] = 0;
|
||
msym = lookup_minimal_symbol (p, NULL, objfile);
|
||
}
|
||
if (msym == NULL && filename != NULL)
|
||
{
|
||
/* And try again for Sun Fortran, but without the filename. */
|
||
p[n] = '_';
|
||
p[n + 1] = 0;
|
||
msym = lookup_minimal_symbol (p, NULL, objfile);
|
||
}
|
||
|
||
return msym == NULL ? 0 : SYMBOL_VALUE_ADDRESS (msym);
|
||
}
|
||
|
||
static void
|
||
function_outside_compilation_unit_complaint (const char *arg1)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
_("function `%s' appears to be defined "
|
||
"outside of all compilation units"),
|
||
arg1);
|
||
}
|
||
|
||
/* Setup partial_symtab's describing each source file for which
|
||
debugging information is available. */
|
||
|
||
static void
|
||
read_dbx_symtab (struct objfile *objfile)
|
||
{
|
||
struct gdbarch *gdbarch = get_objfile_arch (objfile);
|
||
struct external_nlist *bufp = 0; /* =0 avoids gcc -Wall glitch. */
|
||
struct internal_nlist nlist;
|
||
CORE_ADDR text_addr;
|
||
int text_size;
|
||
char *sym_name;
|
||
int sym_len;
|
||
|
||
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;
|
||
int data_sect_index;
|
||
|
||
/* Current partial symtab. */
|
||
struct partial_symtab *pst;
|
||
|
||
/* List of current psymtab's include files. */
|
||
const 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;
|
||
|
||
text_addr = DBX_TEXT_ADDR (objfile);
|
||
text_size = DBX_TEXT_SIZE (objfile);
|
||
|
||
/* 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 = (const char **) alloca (includes_allocated *
|
||
sizeof (const 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_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;
|
||
|
||
/* FIXME: jimb/2003-09-12: We don't apply the right section's offset
|
||
to global and static variables. The stab for a global or static
|
||
variable doesn't give us any indication of which section it's in,
|
||
so we can't tell immediately which offset in
|
||
objfile->section_offsets we should apply to the variable's
|
||
address.
|
||
|
||
We could certainly find out which section contains the variable
|
||
by looking up the variable's unrelocated address with
|
||
find_pc_section, but that would be expensive; this is the
|
||
function that constructs the partial symbol tables by examining
|
||
every symbol in the entire executable, and it's
|
||
performance-critical. So that expense would not be welcome. I'm
|
||
not sure what to do about this at the moment.
|
||
|
||
What we have done for years is to simply assume that the .data
|
||
section's offset is appropriate for all global and static
|
||
variables. Recently, this was expanded to fall back to the .bss
|
||
section's offset if there is no .data section, and then to the
|
||
.rodata section's offset. */
|
||
data_sect_index = objfile->sect_index_data;
|
||
if (data_sect_index == -1)
|
||
data_sect_index = SECT_OFF_BSS (objfile);
|
||
if (data_sect_index == -1)
|
||
data_sect_index = SECT_OFF_RODATA (objfile);
|
||
|
||
/* If data_sect_index is still -1, that's okay. It's perfectly fine
|
||
for the file to have no .data, no .bss, and no .text at all, if
|
||
it also has no global or static variables. If it does, we will
|
||
get an internal error from an ANOFFSET macro below when we try to
|
||
use data_sect_index. */
|
||
|
||
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 two partial
|
||
symbol lists. This last is a large section of code, so
|
||
I've imbedded it in the following macro. */
|
||
|
||
switch (nlist.n_type)
|
||
{
|
||
/*
|
||
* Standard, external, non-debugger, symbols
|
||
*/
|
||
|
||
case N_TEXT | N_EXT:
|
||
case N_NBTEXT | N_EXT:
|
||
nlist.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
goto record_it;
|
||
|
||
case N_DATA | N_EXT:
|
||
case N_NBDATA | N_EXT:
|
||
nlist.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_DATA (objfile));
|
||
goto record_it;
|
||
|
||
case N_BSS:
|
||
case N_BSS | N_EXT:
|
||
case N_NBBSS | N_EXT:
|
||
case N_SETV | N_EXT: /* FIXME, is this in BSS? */
|
||
nlist.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_BSS (objfile));
|
||
goto record_it;
|
||
|
||
case N_ABS | N_EXT:
|
||
record_it:
|
||
namestring = set_namestring (objfile, &nlist);
|
||
|
||
bss_ext_symbol:
|
||
record_minimal_symbol (namestring, nlist.n_value,
|
||
nlist.n_type, objfile); /* Always */
|
||
continue;
|
||
|
||
/* Standard, local, non-debugger, symbols. */
|
||
|
||
case N_NBTEXT:
|
||
|
||
/* We need to be able to deal with both N_FN or N_TEXT,
|
||
because we have no way of knowing whether the sys-supplied ld
|
||
or GNU ld was used to make the executable. Sequents throw
|
||
in another wrinkle -- they renumbered N_FN. */
|
||
|
||
case N_FN:
|
||
case N_FN_SEQ:
|
||
case N_TEXT:
|
||
nlist.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
namestring = set_namestring (objfile, &nlist);
|
||
|
||
if ((namestring[0] == '-' && namestring[1] == 'l')
|
||
|| (namestring[(nsl = strlen (namestring)) - 1] == 'o'
|
||
&& namestring[nsl - 2] == '.'))
|
||
{
|
||
if (past_first_source_file && pst
|
||
/* The gould NP1 uses low values for .o and -l symbols
|
||
which are not the address. */
|
||
&& nlist.n_value >= pst->textlow)
|
||
{
|
||
end_psymtab (pst, psymtab_include_list, includes_used,
|
||
symnum * symbol_size,
|
||
nlist.n_value > pst->texthigh
|
||
? nlist.n_value : pst->texthigh,
|
||
dependency_list, dependencies_used,
|
||
textlow_not_set);
|
||
pst = (struct partial_symtab *) 0;
|
||
includes_used = 0;
|
||
dependencies_used = 0;
|
||
has_line_numbers = 0;
|
||
}
|
||
else
|
||
past_first_source_file = 1;
|
||
last_o_file_start = nlist.n_value;
|
||
}
|
||
else
|
||
goto record_it;
|
||
continue;
|
||
|
||
case N_DATA:
|
||
nlist.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_DATA (objfile));
|
||
goto record_it;
|
||
|
||
case N_UNDF | N_EXT:
|
||
/* The case (nlist.n_value != 0) is a "Fortran COMMON" symbol.
|
||
We used to rely on the target to tell us whether it knows
|
||
where the symbol has been relocated to, but none of the
|
||
target implementations actually provided that operation.
|
||
So we just ignore the symbol, the same way we would do if
|
||
we had a target-side symbol lookup which returned no match.
|
||
|
||
All other symbols (with nlist.n_value == 0), are really
|
||
undefined, and so we ignore them too. */
|
||
continue;
|
||
|
||
case N_UNDF:
|
||
if (processing_acc_compilation && nlist.n_strx == 1)
|
||
{
|
||
/* Deal with relative offsets in the string table
|
||
used in ELF+STAB under Solaris. If we want to use the
|
||
n_strx field, which contains the name of the file,
|
||
we must adjust file_string_table_offset *before* calling
|
||
set_namestring(). */
|
||
past_first_source_file = 1;
|
||
file_string_table_offset = next_file_string_table_offset;
|
||
next_file_string_table_offset =
|
||
file_string_table_offset + nlist.n_value;
|
||
if (next_file_string_table_offset < file_string_table_offset)
|
||
error (_("string table offset backs up at %d"), symnum);
|
||
/* FIXME -- replace error() with complaint. */
|
||
continue;
|
||
}
|
||
continue;
|
||
|
||
/* Lots of symbol types we can just ignore. */
|
||
|
||
case N_ABS:
|
||
case N_NBDATA:
|
||
case N_NBBSS:
|
||
continue;
|
||
|
||
/* Keep going . . . */
|
||
|
||
/*
|
||
* Special symbol types for GNU
|
||
*/
|
||
case N_INDR:
|
||
case N_INDR | N_EXT:
|
||
case N_SETA:
|
||
case N_SETA | N_EXT:
|
||
case N_SETT:
|
||
case N_SETT | N_EXT:
|
||
case N_SETD:
|
||
case N_SETD | N_EXT:
|
||
case N_SETB:
|
||
case N_SETB | N_EXT:
|
||
case N_SETV:
|
||
continue;
|
||
|
||
/*
|
||
* Debugger symbols
|
||
*/
|
||
|
||
case N_SO:
|
||
{
|
||
CORE_ADDR valu;
|
||
static int prev_so_symnum = -10;
|
||
static int first_so_symnum;
|
||
const char *p;
|
||
static char *dirname_nso;
|
||
int prev_textlow_not_set;
|
||
|
||
valu = nlist.n_value + ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
|
||
prev_textlow_not_set = textlow_not_set;
|
||
|
||
/* A zero value is probably an indication for the SunPRO 3.0
|
||
compiler. end_psymtab explicitly tests for zero, so
|
||
don't relocate it. */
|
||
|
||
if (nlist.n_value == 0
|
||
&& gdbarch_sofun_address_maybe_missing (gdbarch))
|
||
{
|
||
textlow_not_set = 1;
|
||
valu = 0;
|
||
}
|
||
else
|
||
textlow_not_set = 0;
|
||
|
||
past_first_source_file = 1;
|
||
|
||
if (prev_so_symnum != symnum - 1)
|
||
{ /* Here if prev stab wasn't N_SO. */
|
||
first_so_symnum = symnum;
|
||
|
||
if (pst)
|
||
{
|
||
end_psymtab (pst, psymtab_include_list, includes_used,
|
||
symnum * symbol_size,
|
||
valu > pst->texthigh ? valu : pst->texthigh,
|
||
dependency_list, dependencies_used,
|
||
prev_textlow_not_set);
|
||
pst = (struct partial_symtab *) 0;
|
||
includes_used = 0;
|
||
dependencies_used = 0;
|
||
has_line_numbers = 0;
|
||
}
|
||
}
|
||
|
||
prev_so_symnum = symnum;
|
||
|
||
/* End the current partial symtab and start a new one. */
|
||
|
||
namestring = set_namestring (objfile, &nlist);
|
||
|
||
/* Null name means end of .o file. Don't start a new one. */
|
||
if (*namestring == '\000')
|
||
continue;
|
||
|
||
/* Some compilers (including gcc) emit a pair of initial N_SOs.
|
||
The first one is a directory name; the second the file name.
|
||
If pst exists, is empty, and has a filename ending in '/',
|
||
we assume the previous N_SO was a directory name. */
|
||
|
||
p = lbasename (namestring);
|
||
if (p != namestring && *p == '\000')
|
||
{
|
||
/* Save the directory name SOs locally, then save it into
|
||
the psymtab when it's created below. */
|
||
dirname_nso = namestring;
|
||
continue;
|
||
}
|
||
|
||
/* Some other compilers (C++ ones in particular) emit useless
|
||
SOs for non-existant .c files. We ignore all subsequent SOs
|
||
that immediately follow the first. */
|
||
|
||
if (!pst)
|
||
{
|
||
pst = start_psymtab (objfile,
|
||
namestring, valu,
|
||
first_so_symnum * symbol_size,
|
||
objfile->global_psymbols.next,
|
||
objfile->static_psymbols.next);
|
||
pst->dirname = dirname_nso;
|
||
dirname_nso = NULL;
|
||
}
|
||
continue;
|
||
}
|
||
|
||
case N_BINCL:
|
||
{
|
||
enum language tmp_language;
|
||
|
||
/* Add this bincl to the bincl_list for future EXCLs. No
|
||
need to save the string; it'll be around until
|
||
read_dbx_symtab function returns. */
|
||
|
||
namestring = set_namestring (objfile, &nlist);
|
||
tmp_language = deduce_language_from_filename (namestring);
|
||
|
||
/* Only change the psymtab's language if we've learned
|
||
something useful (eg. tmp_language is not language_unknown).
|
||
In addition, to match what start_subfile does, never change
|
||
from C++ to C. */
|
||
if (tmp_language != language_unknown
|
||
&& (tmp_language != language_c
|
||
|| psymtab_language != language_cplus))
|
||
psymtab_language = tmp_language;
|
||
|
||
if (pst == NULL)
|
||
{
|
||
/* FIXME: we should not get here without a PST to work on.
|
||
Attempt to recover. */
|
||
complaint (&symfile_complaints,
|
||
_("N_BINCL %s not in entries for "
|
||
"any file, at symtab pos %d"),
|
||
namestring, symnum);
|
||
continue;
|
||
}
|
||
add_bincl_to_list (pst, namestring, nlist.n_value);
|
||
|
||
/* Mark down an include file in the current psymtab. */
|
||
|
||
goto record_include_file;
|
||
}
|
||
|
||
case N_SOL:
|
||
{
|
||
enum language tmp_language;
|
||
|
||
/* Mark down an include file in the current psymtab. */
|
||
namestring = set_namestring (objfile, &nlist);
|
||
tmp_language = deduce_language_from_filename (namestring);
|
||
|
||
/* Only change the psymtab's language if we've learned
|
||
something useful (eg. tmp_language is not language_unknown).
|
||
In addition, to match what start_subfile does, never change
|
||
from C++ to C. */
|
||
if (tmp_language != language_unknown
|
||
&& (tmp_language != language_c
|
||
|| psymtab_language != language_cplus))
|
||
psymtab_language = tmp_language;
|
||
|
||
/* In C++, one may expect the same filename to come round many
|
||
times, when code is coming alternately from the main file
|
||
and from inline functions in other files. So I check to see
|
||
if this is a file we've seen before -- either the main
|
||
source file, or a previously included file.
|
||
|
||
This seems to be a lot of time to be spending on N_SOL, but
|
||
things like "break c-exp.y:435" need to work (I
|
||
suppose the psymtab_include_list could be hashed or put
|
||
in a binary tree, if profiling shows this is a major hog). */
|
||
if (pst && filename_cmp (namestring, pst->filename) == 0)
|
||
continue;
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < includes_used; i++)
|
||
if (filename_cmp (namestring, psymtab_include_list[i]) == 0)
|
||
{
|
||
i = -1;
|
||
break;
|
||
}
|
||
if (i == -1)
|
||
continue;
|
||
}
|
||
|
||
record_include_file:
|
||
|
||
psymtab_include_list[includes_used++] = namestring;
|
||
if (includes_used >= includes_allocated)
|
||
{
|
||
const char **orig = psymtab_include_list;
|
||
|
||
psymtab_include_list = (const char **)
|
||
alloca ((includes_allocated *= 2) * sizeof (const char *));
|
||
memcpy (psymtab_include_list, orig,
|
||
includes_used * sizeof (const char *));
|
||
}
|
||
continue;
|
||
}
|
||
case N_LSYM: /* Typedef or automatic variable. */
|
||
case N_STSYM: /* Data seg var -- static. */
|
||
case N_LCSYM: /* BSS " */
|
||
case N_ROSYM: /* Read-only data seg var -- static. */
|
||
case N_NBSTS: /* Gould nobase. */
|
||
case N_NBLCS: /* symbols. */
|
||
case N_FUN:
|
||
case N_GSYM: /* Global (extern) variable; can be
|
||
data or bss (sigh FIXME). */
|
||
|
||
/* Following may probably be ignored; I'll leave them here
|
||
for now (until I do Pascal and Modula 2 extensions). */
|
||
|
||
case N_PC: /* I may or may not need this; I
|
||
suspect not. */
|
||
case N_M2C: /* I suspect that I can ignore this here. */
|
||
case N_SCOPE: /* Same. */
|
||
{
|
||
char *p;
|
||
|
||
namestring = set_namestring (objfile, &nlist);
|
||
|
||
/* See if this is an end of function stab. */
|
||
if (pst && nlist.n_type == N_FUN && *namestring == '\000')
|
||
{
|
||
CORE_ADDR valu;
|
||
|
||
/* It's value is the size (in bytes) of the function for
|
||
function relative stabs, or the address of the function's
|
||
end for old style stabs. */
|
||
valu = nlist.n_value + last_function_start;
|
||
if (pst->texthigh == 0 || valu > pst->texthigh)
|
||
pst->texthigh = valu;
|
||
break;
|
||
}
|
||
|
||
p = (char *) strchr (namestring, ':');
|
||
if (!p)
|
||
continue; /* Not a debugging symbol. */
|
||
|
||
sym_len = 0;
|
||
sym_name = NULL; /* pacify "gcc -Werror" */
|
||
if (psymtab_language == language_cplus)
|
||
{
|
||
char *new_name, *name = xmalloc (p - namestring + 1);
|
||
memcpy (name, namestring, p - namestring);
|
||
|
||
name[p - namestring] = '\0';
|
||
new_name = cp_canonicalize_string (name);
|
||
if (new_name != NULL)
|
||
{
|
||
sym_len = strlen (new_name);
|
||
sym_name = obsavestring (new_name, sym_len,
|
||
&objfile->objfile_obstack);
|
||
xfree (new_name);
|
||
}
|
||
xfree (name);
|
||
}
|
||
|
||
if (sym_len == 0)
|
||
{
|
||
sym_name = namestring;
|
||
sym_len = p - namestring;
|
||
}
|
||
|
||
/* Main processing section for debugging symbols which
|
||
the initial read through the symbol tables needs to worry
|
||
about. If we reach this point, the symbol which we are
|
||
considering is definitely one we are interested in.
|
||
p must also contain the (valid) index into the namestring
|
||
which indicates the debugging type symbol. */
|
||
|
||
switch (p[1])
|
||
{
|
||
case 'S':
|
||
nlist.n_value += ANOFFSET (objfile->section_offsets,
|
||
data_sect_index);
|
||
|
||
if (gdbarch_static_transform_name_p (gdbarch))
|
||
gdbarch_static_transform_name (gdbarch, namestring);
|
||
|
||
add_psymbol_to_list (sym_name, sym_len, 1,
|
||
VAR_DOMAIN, LOC_STATIC,
|
||
&objfile->static_psymbols,
|
||
0, nlist.n_value,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'G':
|
||
nlist.n_value += ANOFFSET (objfile->section_offsets,
|
||
data_sect_index);
|
||
/* The addresses in these entries are reported to be
|
||
wrong. See the code that reads 'G's for symtabs. */
|
||
add_psymbol_to_list (sym_name, sym_len, 1,
|
||
VAR_DOMAIN, LOC_STATIC,
|
||
&objfile->global_psymbols,
|
||
0, nlist.n_value,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'T':
|
||
/* When a 'T' entry is defining an anonymous enum, it
|
||
may have a name which is the empty string, or a
|
||
single space. Since they're not really defining a
|
||
symbol, those shouldn't go in the partial symbol
|
||
table. We do pick up the elements of such enums at
|
||
'check_enum:', below. */
|
||
if (p >= namestring + 2
|
||
|| (p == namestring + 1
|
||
&& namestring[0] != ' '))
|
||
{
|
||
add_psymbol_to_list (sym_name, sym_len, 1,
|
||
STRUCT_DOMAIN, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
nlist.n_value, 0,
|
||
psymtab_language, objfile);
|
||
if (p[2] == 't')
|
||
{
|
||
/* Also a typedef with the same name. */
|
||
add_psymbol_to_list (sym_name, sym_len, 1,
|
||
VAR_DOMAIN, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
nlist.n_value, 0,
|
||
psymtab_language, objfile);
|
||
p += 1;
|
||
}
|
||
}
|
||
goto check_enum;
|
||
|
||
case 't':
|
||
if (p != namestring) /* a name is there, not just :T... */
|
||
{
|
||
add_psymbol_to_list (sym_name, sym_len, 1,
|
||
VAR_DOMAIN, LOC_TYPEDEF,
|
||
&objfile->static_psymbols,
|
||
nlist.n_value, 0,
|
||
psymtab_language, objfile);
|
||
}
|
||
check_enum:
|
||
/* If this is an enumerated type, we need to
|
||
add all the enum constants to the partial symbol
|
||
table. This does not cover enums without names, e.g.
|
||
"enum {a, b} c;" in C, but fortunately those are
|
||
rare. There is no way for GDB to find those from the
|
||
enum type without spending too much time on it. Thus
|
||
to solve this problem, the compiler needs to put out the
|
||
enum in a nameless type. GCC2 does this. */
|
||
|
||
/* We are looking for something of the form
|
||
<name> ":" ("t" | "T") [<number> "="] "e"
|
||
{<constant> ":" <value> ","} ";". */
|
||
|
||
/* Skip over the colon and the 't' or 'T'. */
|
||
p += 2;
|
||
/* This type may be given a number. Also, numbers can come
|
||
in pairs like (0,26). Skip over it. */
|
||
while ((*p >= '0' && *p <= '9')
|
||
|| *p == '(' || *p == ',' || *p == ')'
|
||
|| *p == '=')
|
||
p++;
|
||
|
||
if (*p++ == 'e')
|
||
{
|
||
/* The aix4 compiler emits extra crud before the members. */
|
||
if (*p == '-')
|
||
{
|
||
/* Skip over the type (?). */
|
||
while (*p != ':')
|
||
p++;
|
||
|
||
/* Skip over the colon. */
|
||
p++;
|
||
}
|
||
|
||
/* We have found an enumerated type. */
|
||
/* According to comments in read_enum_type
|
||
a comma could end it instead of a semicolon.
|
||
I don't know where that happens.
|
||
Accept either. */
|
||
while (*p && *p != ';' && *p != ',')
|
||
{
|
||
char *q;
|
||
|
||
/* Check for and handle cretinous dbx symbol name
|
||
continuation! */
|
||
if (*p == '\\' || (*p == '?' && p[1] == '\0'))
|
||
p = next_symbol_text (objfile);
|
||
|
||
/* Point to the character after the name
|
||
of the enum constant. */
|
||
for (q = p; *q && *q != ':'; q++)
|
||
;
|
||
/* Note that the value doesn't matter for
|
||
enum constants in psymtabs, just in symtabs. */
|
||
add_psymbol_to_list (p, q - p, 1,
|
||
VAR_DOMAIN, LOC_CONST,
|
||
&objfile->static_psymbols, 0,
|
||
0, psymtab_language, objfile);
|
||
/* Point past the name. */
|
||
p = q;
|
||
/* Skip over the value. */
|
||
while (*p && *p != ',')
|
||
p++;
|
||
/* Advance past the comma. */
|
||
if (*p)
|
||
p++;
|
||
}
|
||
}
|
||
continue;
|
||
|
||
case 'c':
|
||
/* Constant, e.g. from "const" in Pascal. */
|
||
add_psymbol_to_list (sym_name, sym_len, 1,
|
||
VAR_DOMAIN, LOC_CONST,
|
||
&objfile->static_psymbols, nlist.n_value,
|
||
0, psymtab_language, objfile);
|
||
continue;
|
||
|
||
case 'f':
|
||
if (! pst)
|
||
{
|
||
int name_len = p - namestring;
|
||
char *name = xmalloc (name_len + 1);
|
||
|
||
memcpy (name, namestring, name_len);
|
||
name[name_len] = '\0';
|
||
function_outside_compilation_unit_complaint (name);
|
||
xfree (name);
|
||
}
|
||
nlist.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
/* Kludges for ELF/STABS with Sun ACC. */
|
||
last_function_name = namestring;
|
||
/* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
|
||
value for the bottom of the text seg in those cases. */
|
||
if (nlist.n_value == ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile))
|
||
&& gdbarch_sofun_address_maybe_missing (gdbarch))
|
||
{
|
||
CORE_ADDR minsym_valu =
|
||
find_stab_function_addr (namestring,
|
||
pst ? pst->filename : NULL,
|
||
objfile);
|
||
|
||
/* find_stab_function_addr will return 0 if the minimal
|
||
symbol wasn't found. (Unfortunately, this might also
|
||
be a valid address.) Anyway, if it *does* return 0,
|
||
it is likely that the value was set correctly to begin
|
||
with... */
|
||
if (minsym_valu != 0)
|
||
nlist.n_value = minsym_valu;
|
||
}
|
||
if (pst && textlow_not_set
|
||
&& gdbarch_sofun_address_maybe_missing (gdbarch))
|
||
{
|
||
pst->textlow = nlist.n_value;
|
||
textlow_not_set = 0;
|
||
}
|
||
/* End kludge. */
|
||
|
||
/* Keep track of the start of the last function so we
|
||
can handle end of function symbols. */
|
||
last_function_start = nlist.n_value;
|
||
|
||
/* In reordered executables this function may lie outside
|
||
the bounds created by N_SO symbols. If that's the case
|
||
use the address of this function as the low bound for
|
||
the partial symbol table. */
|
||
if (pst
|
||
&& (textlow_not_set
|
||
|| (nlist.n_value < pst->textlow
|
||
&& (nlist.n_value
|
||
!= ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile))))))
|
||
{
|
||
pst->textlow = nlist.n_value;
|
||
textlow_not_set = 0;
|
||
}
|
||
add_psymbol_to_list (sym_name, sym_len, 1,
|
||
VAR_DOMAIN, LOC_BLOCK,
|
||
&objfile->static_psymbols,
|
||
0, nlist.n_value,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
|
||
/* Global functions were ignored here, but now they
|
||
are put into the global psymtab like one would expect.
|
||
They're also in the minimal symbol table. */
|
||
case 'F':
|
||
if (! pst)
|
||
{
|
||
int name_len = p - namestring;
|
||
char *name = xmalloc (name_len + 1);
|
||
|
||
memcpy (name, namestring, name_len);
|
||
name[name_len] = '\0';
|
||
function_outside_compilation_unit_complaint (name);
|
||
xfree (name);
|
||
}
|
||
nlist.n_value += ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile));
|
||
/* Kludges for ELF/STABS with Sun ACC. */
|
||
last_function_name = namestring;
|
||
/* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
|
||
value for the bottom of the text seg in those cases. */
|
||
if (nlist.n_value == ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile))
|
||
&& gdbarch_sofun_address_maybe_missing (gdbarch))
|
||
{
|
||
CORE_ADDR minsym_valu =
|
||
find_stab_function_addr (namestring,
|
||
pst ? pst->filename : NULL,
|
||
objfile);
|
||
|
||
/* find_stab_function_addr will return 0 if the minimal
|
||
symbol wasn't found. (Unfortunately, this might also
|
||
be a valid address.) Anyway, if it *does* return 0,
|
||
it is likely that the value was set correctly to begin
|
||
with... */
|
||
if (minsym_valu != 0)
|
||
nlist.n_value = minsym_valu;
|
||
}
|
||
if (pst && textlow_not_set
|
||
&& gdbarch_sofun_address_maybe_missing (gdbarch))
|
||
{
|
||
pst->textlow = nlist.n_value;
|
||
textlow_not_set = 0;
|
||
}
|
||
/* End kludge. */
|
||
|
||
/* Keep track of the start of the last function so we
|
||
can handle end of function symbols. */
|
||
last_function_start = nlist.n_value;
|
||
|
||
/* In reordered executables this function may lie outside
|
||
the bounds created by N_SO symbols. If that's the case
|
||
use the address of this function as the low bound for
|
||
the partial symbol table. */
|
||
if (pst
|
||
&& (textlow_not_set
|
||
|| (nlist.n_value < pst->textlow
|
||
&& (nlist.n_value
|
||
!= ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile))))))
|
||
{
|
||
pst->textlow = nlist.n_value;
|
||
textlow_not_set = 0;
|
||
}
|
||
add_psymbol_to_list (sym_name, sym_len, 1,
|
||
VAR_DOMAIN, LOC_BLOCK,
|
||
&objfile->global_psymbols,
|
||
0, nlist.n_value,
|
||
psymtab_language, objfile);
|
||
continue;
|
||
|
||
/* Two things show up here (hopefully); static symbols of
|
||
local scope (static used inside braces) or extensions
|
||
of structure symbols. We can ignore both. */
|
||
case 'V':
|
||
case '(':
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
case '-':
|
||
case '#': /* For symbol identification (used in live ranges). */
|
||
continue;
|
||
|
||
case ':':
|
||
/* It is a C++ nested symbol. We don't need to record it
|
||
(I don't think); if we try to look up foo::bar::baz,
|
||
then symbols for the symtab containing foo should get
|
||
read in, I think. */
|
||
/* Someone says sun cc puts out symbols like
|
||
/foo/baz/maclib::/usr/local/bin/maclib,
|
||
which would get here with a symbol type of ':'. */
|
||
continue;
|
||
|
||
default:
|
||
/* Unexpected symbol descriptor. The second and subsequent stabs
|
||
of a continued stab can show up here. The question is
|
||
whether they ever can mimic a normal stab--it would be
|
||
nice if not, since we certainly don't want to spend the
|
||
time searching to the end of every string looking for
|
||
a backslash. */
|
||
|
||
complaint (&symfile_complaints,
|
||
_("unknown symbol descriptor `%c'"),
|
||
p[1]);
|
||
|
||
/* Ignore it; perhaps it is an extension that we don't
|
||
know about. */
|
||
continue;
|
||
}
|
||
}
|
||
|
||
case N_EXCL:
|
||
|
||
namestring = set_namestring (objfile, &nlist);
|
||
|
||
/* Find the corresponding bincl and mark that psymtab on the
|
||
psymtab dependency list. */
|
||
{
|
||
struct partial_symtab *needed_pst =
|
||
find_corresponding_bincl_psymtab (namestring, nlist.n_value);
|
||
|
||
/* If this include file was defined earlier in this file,
|
||
leave it alone. */
|
||
if (needed_pst == pst)
|
||
continue;
|
||
|
||
if (needed_pst)
|
||
{
|
||
int i;
|
||
int found = 0;
|
||
|
||
for (i = 0; i < dependencies_used; i++)
|
||
if (dependency_list[i] == needed_pst)
|
||
{
|
||
found = 1;
|
||
break;
|
||
}
|
||
|
||
/* If it's already in the list, skip the rest. */
|
||
if (found)
|
||
continue;
|
||
|
||
dependency_list[dependencies_used++] = needed_pst;
|
||
if (dependencies_used >= dependencies_allocated)
|
||
{
|
||
struct partial_symtab **orig = dependency_list;
|
||
|
||
dependency_list =
|
||
(struct partial_symtab **)
|
||
alloca ((dependencies_allocated *= 2)
|
||
* sizeof (struct partial_symtab *));
|
||
memcpy (dependency_list, orig,
|
||
(dependencies_used
|
||
* sizeof (struct partial_symtab *)));
|
||
#ifdef DEBUG_INFO
|
||
fprintf_unfiltered (gdb_stderr,
|
||
"Had to reallocate "
|
||
"dependency list.\n");
|
||
fprintf_unfiltered (gdb_stderr,
|
||
"New dependencies allocated: %d\n",
|
||
dependencies_allocated);
|
||
#endif
|
||
}
|
||
}
|
||
}
|
||
continue;
|
||
|
||
case N_ENDM:
|
||
/* Solaris 2 end of module, finish current partial symbol table.
|
||
end_psymtab will set pst->texthigh to the proper value, which
|
||
is necessary if a module compiled without debugging info
|
||
follows this module. */
|
||
if (pst && gdbarch_sofun_address_maybe_missing (gdbarch))
|
||
{
|
||
end_psymtab (pst, psymtab_include_list, includes_used,
|
||
symnum * symbol_size,
|
||
(CORE_ADDR) 0, dependency_list,
|
||
dependencies_used, textlow_not_set);
|
||
pst = (struct partial_symtab *) 0;
|
||
includes_used = 0;
|
||
dependencies_used = 0;
|
||
has_line_numbers = 0;
|
||
}
|
||
continue;
|
||
|
||
case N_RBRAC:
|
||
#ifdef HANDLE_RBRAC
|
||
HANDLE_RBRAC (nlist.n_value);
|
||
continue;
|
||
#endif
|
||
case N_EINCL:
|
||
case N_DSLINE:
|
||
case N_BSLINE:
|
||
case N_SSYM: /* Claim: Structure or union element.
|
||
Hopefully, I can ignore this. */
|
||
case N_ENTRY: /* Alternate entry point; can ignore. */
|
||
case N_MAIN: /* Can definitely ignore this. */
|
||
case N_CATCH: /* These are GNU C++ extensions */
|
||
case N_EHDECL: /* that can safely be ignored here. */
|
||
case N_LENG:
|
||
case N_BCOMM:
|
||
case N_ECOMM:
|
||
case N_ECOML:
|
||
case N_FNAME:
|
||
case N_SLINE:
|
||
case N_RSYM:
|
||
case N_PSYM:
|
||
case N_LBRAC:
|
||
case N_NSYMS: /* Ultrix 4.0: symbol count */
|
||
case N_DEFD: /* GNU Modula-2 */
|
||
case N_ALIAS: /* SunPro F77: alias name, ignore for now. */
|
||
|
||
case N_OBJ: /* Useless types from Solaris. */
|
||
case N_OPT:
|
||
case N_PATCH:
|
||
/* These symbols aren't interesting; don't worry about them. */
|
||
continue;
|
||
|
||
default:
|
||
/* If we haven't found it yet, ignore it. It's probably some
|
||
new type we don't know about yet. */
|
||
unknown_symtype_complaint (hex_string (nlist.n_type));
|
||
continue;
|
||
}
|
||
}
|
||
|
||
/* If there's stuff to be cleaned up, clean it up. */
|
||
if (pst)
|
||
{
|
||
/* Don't set pst->texthigh lower than it already is. */
|
||
CORE_ADDR text_end =
|
||
(lowest_text_address == (CORE_ADDR) -1
|
||
? (text_addr + ANOFFSET (objfile->section_offsets,
|
||
SECT_OFF_TEXT (objfile)))
|
||
: 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). */
|
||
|
||
static struct partial_symtab *
|
||
start_psymtab (struct objfile *objfile, 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, objfile->section_offsets,
|
||
filename, textlow, global_syms, static_syms);
|
||
|
||
result->read_symtab_private = obstack_alloc (&objfile->objfile_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;
|
||
|
||
#ifdef HAVE_ELF
|
||
/* 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);
|
||
#endif
|
||
|
||
/* 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 (struct partial_symtab *pst,
|
||
const 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;
|
||
struct gdbarch *gdbarch = get_objfile_arch (objfile);
|
||
|
||
if (capping_symbol_offset != -1)
|
||
LDSYMLEN (pst) = capping_symbol_offset - LDSYMOFF (pst);
|
||
pst->texthigh = capping_text;
|
||
|
||
/* 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: 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, 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
|
||
&& gdbarch_sofun_address_maybe_missing (gdbarch))
|
||
{
|
||
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;
|
||
}
|
||
|
||
if (!gdbarch_sofun_address_maybe_missing (gdbarch))
|
||
;
|
||
/* This test will be true if the last .o file is only data. */
|
||
else 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. */
|
||
|
||
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->objfile_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);
|
||
|
||
/* Copy the sesction_offsets array from the main psymtab. */
|
||
subpst->section_offsets = pst->section_offsets;
|
||
subpst->read_symtab_private =
|
||
obstack_alloc (&objfile->objfile_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->objfile_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 (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 (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 (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);
|
||
|
||
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 (struct partial_symtab *pst)
|
||
{
|
||
bfd *sym_bfd;
|
||
struct cleanup *back_to = NULL;
|
||
|
||
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;
|
||
|
||
if (DBX_STAB_SECTION (pst->objfile))
|
||
{
|
||
stabs_data
|
||
= symfile_relocate_debug_section (pst->objfile,
|
||
DBX_STAB_SECTION (pst->objfile),
|
||
NULL);
|
||
|
||
if (stabs_data)
|
||
back_to = make_cleanup (free_current_contents,
|
||
(void *) &stabs_data);
|
||
}
|
||
|
||
dbx_psymtab_to_symtab_1 (pst);
|
||
|
||
if (back_to)
|
||
do_cleanups (back_to);
|
||
|
||
/* 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 (struct partial_symtab *pst)
|
||
{
|
||
char *namestring;
|
||
struct external_nlist *bufp;
|
||
struct internal_nlist nlist;
|
||
unsigned char type;
|
||
unsigned max_symnum;
|
||
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;
|
||
/* This cannot be simply objfile->section_offsets because of
|
||
elfstab_offset_sections() which initializes the psymtab section
|
||
offsets information in a special way, and that is different from
|
||
objfile->section_offsets. */
|
||
section_offsets = pst->section_offsets;
|
||
|
||
dbxread_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;
|
||
symbuf_read = 0;
|
||
symbuf_left = sym_offset + sym_size;
|
||
|
||
/* 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)
|
||
{
|
||
stabs_seek (sym_offset - symbol_size);
|
||
fill_symbuf (abfd);
|
||
bufp = &symbuf[symbuf_idx++];
|
||
INTERNALIZE_SYMBOL (nlist, bufp, abfd);
|
||
OBJSTAT (objfile, n_stabs++);
|
||
|
||
namestring = set_namestring (objfile, &nlist);
|
||
|
||
processing_gcc_compilation = 0;
|
||
if (nlist.n_type == N_TEXT)
|
||
{
|
||
const char *tempstring = namestring;
|
||
|
||
if (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
|
||
processing_gcc_compilation = 1;
|
||
else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
|
||
processing_gcc_compilation = 2;
|
||
if (tempstring[0] == bfd_get_symbol_leading_char (symfile_bfd))
|
||
++tempstring;
|
||
if (strncmp (tempstring, "__gnu_compiled", 14) == 0)
|
||
processing_gcc_compilation = 2;
|
||
}
|
||
|
||
/* Try to select a C++ demangling based on the compilation unit
|
||
producer. */
|
||
|
||
#if 0
|
||
/* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
|
||
know whether it will use the old style or v3 mangling. */
|
||
if (processing_gcc_compilation)
|
||
{
|
||
if (AUTO_DEMANGLING)
|
||
{
|
||
set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
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. */
|
||
stabs_seek (sym_offset);
|
||
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);
|
||
|
||
namestring = set_namestring (objfile, &nlist);
|
||
|
||
if (type & N_STAB)
|
||
{
|
||
if (sizeof (nlist.n_value) > 4
|
||
/* We are a 64-bit debugger debugging a 32-bit program. */
|
||
&& (type == N_LSYM || type == N_PSYM))
|
||
/* We have to be careful with the n_value in the case of N_LSYM
|
||
and N_PSYM entries, because they are signed offsets from frame
|
||
pointer, but we actually read them as unsigned 32-bit values.
|
||
This is not a problem for 32-bit debuggers, for which negative
|
||
values end up being interpreted correctly (as negative
|
||
offsets) due to integer overflow.
|
||
But we need to sign-extend the value for 64-bit debuggers,
|
||
or we'll end up interpreting negative values as very large
|
||
positive offsets. */
|
||
nlist.n_value = (nlist.n_value ^ 0x80000000) - 0x80000000;
|
||
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 (strcmp (namestring, GCC_COMPILED_FLAG_SYMBOL) == 0)
|
||
processing_gcc_compilation = 1;
|
||
else if (strcmp (namestring, GCC2_COMPILED_FLAG_SYMBOL) == 0)
|
||
processing_gcc_compilation = 2;
|
||
|
||
#if 0
|
||
/* For now, stay with AUTO_DEMANGLING for g++ output, as we don't
|
||
know whether it will use the old style or v3 mangling. */
|
||
if (AUTO_DEMANGLING)
|
||
{
|
||
set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
|
||
}
|
||
#endif
|
||
}
|
||
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. */
|
||
;
|
||
}
|
||
}
|
||
|
||
/* 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 (objfile));
|
||
|
||
end_stabs ();
|
||
|
||
dbxread_objfile = NULL;
|
||
}
|
||
|
||
|
||
/* 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. Note
|
||
that these section_offsets are not the objfile->section_offsets but
|
||
the pst->section_offsets. 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 (int type, int desc, CORE_ADDR valu, char *name,
|
||
struct section_offsets *section_offsets,
|
||
struct objfile *objfile)
|
||
{
|
||
struct gdbarch *gdbarch = get_objfile_arch (objfile);
|
||
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;
|
||
|
||
/* This holds the address of the start of a function, without the
|
||
system peculiarities of function_start_offset. */
|
||
static CORE_ADDR last_function_start;
|
||
|
||
/* If this is nonzero, we've seen an N_SLINE since the start of the
|
||
current function. We use this to tell us to move the first sline
|
||
to the beginning of the function regardless of what its given
|
||
value is. */
|
||
static int sline_found_in_function = 1;
|
||
|
||
/* 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 (objfile));
|
||
}
|
||
|
||
/* 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. */
|
||
struct block *block;
|
||
|
||
if (context_stack_depth <= 0)
|
||
{
|
||
lbrac_mismatch_complaint (symnum);
|
||
break;
|
||
}
|
||
|
||
/* The following check is added before recording line 0 at
|
||
end of function so as to handle hand-generated stabs
|
||
which may have an N_FUN stabs at the end of the function,
|
||
but no N_SLINE stabs. */
|
||
if (sline_found_in_function)
|
||
{
|
||
CORE_ADDR addr = last_function_start + valu;
|
||
|
||
record_line (current_subfile, 0,
|
||
gdbarch_addr_bits_remove (gdbarch, addr));
|
||
}
|
||
|
||
within_function = 0;
|
||
new = pop_context ();
|
||
|
||
/* Make a block for the local symbols within. */
|
||
block = finish_block (new->name, &local_symbols, new->old_blocks,
|
||
new->start_addr, new->start_addr + valu,
|
||
objfile);
|
||
|
||
/* For C++, set the block's scope. */
|
||
if (SYMBOL_LANGUAGE (new->name) == language_cplus)
|
||
cp_set_block_scope (new->name, block, &objfile->objfile_obstack,
|
||
"", 0);
|
||
|
||
/* 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;
|
||
}
|
||
|
||
sline_found_in_function = 0;
|
||
|
||
/* Relocate for dynamic loading. */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
|
||
valu = gdbarch_smash_text_address (gdbarch, valu);
|
||
last_function_start = valu;
|
||
|
||
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;
|
||
|
||
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;
|
||
|
||
if (context_stack_depth <= 0)
|
||
{
|
||
lbrac_mismatch_complaint (symnum);
|
||
break;
|
||
}
|
||
|
||
new = pop_context ();
|
||
if (desc != new->depth)
|
||
lbrac_mismatch_complaint (symnum);
|
||
|
||
if (local_symbols != NULL)
|
||
{
|
||
/* GCC development snapshots from March to December of
|
||
2000 would output N_LSYM entries after N_LBRAC
|
||
entries. As a consequence, these symbols are simply
|
||
discarded. Complain if this is the case. */
|
||
complaint (&symfile_complaints,
|
||
_("misplaced N_LBRAC entry; discarding local "
|
||
"symbols which have no enclosing block"));
|
||
}
|
||
local_symbols = new->locals;
|
||
|
||
if (context_stack_depth > 1)
|
||
{
|
||
/* 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)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
_("block start larger than block end"));
|
||
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;
|
||
}
|
||
|
||
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 (objfile));
|
||
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 (objfile));
|
||
|
||
n_opt_found = 0;
|
||
|
||
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 (objfile));
|
||
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 (objfile));
|
||
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
|
||
function-relative symbols. */
|
||
valu += function_start_offset;
|
||
|
||
/* GCC 2.95.3 emits the first N_SLINE stab somwehere in the
|
||
middle of the prologue instead of right at the start of the
|
||
function. To deal with this we record the address for the
|
||
first N_SLINE stab to be the start of the function instead of
|
||
the listed location. We really shouldn't to this. When
|
||
compiling with optimization, this first N_SLINE stab might be
|
||
optimized away. Other (non-GCC) compilers don't emit this
|
||
stab at all. There is no real harm in having an extra
|
||
numbered line, although it can be a bit annoying for the
|
||
user. However, it totally screws up our testsuite.
|
||
|
||
So for now, keep adjusting the address of the first N_SLINE
|
||
stab, but only for code compiled with GCC. */
|
||
|
||
if (within_function && sline_found_in_function == 0)
|
||
{
|
||
CORE_ADDR addr = processing_gcc_compilation == 2 ?
|
||
last_function_start : valu;
|
||
|
||
record_line (current_subfile, desc,
|
||
gdbarch_addr_bits_remove (gdbarch, addr));
|
||
sline_found_in_function = 1;
|
||
}
|
||
else
|
||
record_line (current_subfile, desc,
|
||
gdbarch_addr_bits_remove (gdbarch, 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 segment. */
|
||
case N_LCSYM: /* Static symbol in BSS segment. */
|
||
case N_ROSYM: /* Static symbol in read-only data segment. */
|
||
/* HORRID HACK DEPT. However, it's Sun's furgin' fault.
|
||
Solaris 2'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;
|
||
|
||
/* Normal object file 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
|
||
SunOS 4, 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 (objfile));
|
||
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:
|
||
internal_error (__FILE__, __LINE__,
|
||
_("failed internal consistency check"));
|
||
}
|
||
}
|
||
|
||
case_N_STSYM: /* Static symbol in data segment. */
|
||
case N_DSLINE: /* Source line number, data segment. */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_DATA (objfile));
|
||
goto define_a_symbol;
|
||
|
||
case_N_LCSYM: /* Static symbol in BSS segment. */
|
||
case N_BSLINE: /* Source line number, BSS segment. */
|
||
/* N_BROWS: overlaps with N_BSLINE. */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_BSS (objfile));
|
||
goto define_a_symbol;
|
||
|
||
case_N_ROSYM: /* Static symbol in read-only data segment. */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_RODATA (objfile));
|
||
goto define_a_symbol;
|
||
|
||
case N_ENTRY: /* Alternate entry point. */
|
||
/* Relocate for dynamic loading. */
|
||
valu += ANOFFSET (section_offsets, SECT_OFF_TEXT (objfile));
|
||
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:
|
||
unknown_symtype_complaint (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;
|
||
|
||
/* 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 (objfile))
|
||
&& gdbarch_sofun_address_maybe_missing (gdbarch))
|
||
{
|
||
CORE_ADDR minsym_valu =
|
||
find_stab_function_addr (name, last_source_file, objfile);
|
||
|
||
/* The function find_stab_function_addr will return
|
||
0 if the minimal symbol wasn't found.
|
||
(Unfortunately, this might also be a valid
|
||
address.) Anyway, if it *does* return 0, it is
|
||
likely that the value was set correctly to begin
|
||
with... */
|
||
if (minsym_valu != 0)
|
||
valu = minsym_valu;
|
||
}
|
||
|
||
if (block_address_function_relative)
|
||
/* For Solaris 2 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, 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 > 1)
|
||
{
|
||
complaint (&symfile_complaints,
|
||
_("unmatched N_LBRAC before symtab pos %d"),
|
||
symnum);
|
||
break;
|
||
}
|
||
|
||
if (context_stack_depth > 0)
|
||
{
|
||
struct block *block;
|
||
|
||
new = pop_context ();
|
||
/* Make a block for the local symbols within. */
|
||
block = finish_block (new->name, &local_symbols,
|
||
new->old_blocks, new->start_addr,
|
||
valu, objfile);
|
||
|
||
/* For C++, set the block's scope. */
|
||
if (SYMBOL_LANGUAGE (new->name) == language_cplus)
|
||
cp_set_block_scope (new->name, block,
|
||
&objfile->objfile_obstack,
|
||
"", 0);
|
||
}
|
||
|
||
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 (strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0)
|
||
{
|
||
processing_gcc_compilation = 2;
|
||
#if 0 /* Works, but is experimental. -fnf */
|
||
/* For now, stay with AUTO_DEMANGLING for g++ output, as
|
||
we don't know whether it will use the old style or v3
|
||
mangling. */
|
||
if (AUTO_DEMANGLING)
|
||
{
|
||
set_demangling_style (GNU_DEMANGLING_STYLE_STRING);
|
||
}
|
||
#endif
|
||
}
|
||
else
|
||
n_opt_found = 1;
|
||
}
|
||
break;
|
||
|
||
case N_MAIN: /* Name of main routine. */
|
||
/* FIXME: If one has a symbol file with N_MAIN and then replaces
|
||
it with a symbol file with "main" and without N_MAIN. I'm
|
||
not sure exactly what rule to follow but probably something
|
||
like: N_MAIN takes precedence over "main" no matter what
|
||
objfile it is in; If there is more than one N_MAIN, choose
|
||
the one in the symfile_objfile; If there is more than one
|
||
N_MAIN within a given objfile, complain() and choose
|
||
arbitrarily. (kingdon) */
|
||
if (name != NULL)
|
||
set_main_name (name);
|
||
break;
|
||
|
||
/* The following symbol types can be ignored. */
|
||
case N_OBJ: /* Solaris 2: Object file dir and name. */
|
||
case N_PATCH: /* Solaris 2: Patch Run Time Checker. */
|
||
/* 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_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. */
|
||
gdb_assert (name);
|
||
if (name[0] == '#')
|
||
{
|
||
/* Initialize symbol reference names and determine if this is a
|
||
definition. If a symbol reference is being defined, go ahead
|
||
and add it. Otherwise, just return. */
|
||
|
||
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).
|
||
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 (struct objfile *objfile,
|
||
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->deprecated_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->objfile_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_bread (DBX_STRINGTAB (objfile), stabstrsize, 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, 0);
|
||
}
|
||
|
||
/* Scan and build partial symbols for an ELF symbol file.
|
||
This ELF 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).
|
||
STABSECT is the BFD section information for the .stab section.
|
||
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 (struct objfile *objfile, asection *stabsect,
|
||
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;
|
||
struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
|
||
|
||
/* 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->deprecated_sym_stab_info;
|
||
|
||
/* Find the first and last text address. dbx_symfile_read seems to
|
||
want this. */
|
||
find_text_range (sym_bfd, objfile);
|
||
|
||
#define ELF_STABS_SYMBOL_SIZE 12 /* XXX FIXME XXX */
|
||
DBX_SYMBOL_SIZE (objfile) = ELF_STABS_SYMBOL_SIZE;
|
||
DBX_SYMCOUNT (objfile)
|
||
= bfd_section_size (objfile->obfd, stabsect) / DBX_SYMBOL_SIZE (objfile);
|
||
DBX_STRINGTAB_SIZE (objfile) = stabstrsize;
|
||
DBX_SYMTAB_OFFSET (objfile) = stabsect->filepos;
|
||
DBX_STAB_SECTION (objfile) = stabsect;
|
||
|
||
if (stabstrsize > bfd_get_size (sym_bfd))
|
||
error (_("ridiculous string table size: %d bytes"), stabstrsize);
|
||
DBX_STRINGTAB (objfile) = (char *)
|
||
obstack_alloc (&objfile->objfile_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_bread (DBX_STRINGTAB (objfile), stabstrsize, 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;
|
||
|
||
symbuf_read = 0;
|
||
symbuf_left = bfd_section_size (objfile->obfd, stabsect);
|
||
stabs_data = symfile_relocate_debug_section (objfile, stabsect, NULL);
|
||
if (stabs_data)
|
||
make_cleanup (free_current_contents, (void *) &stabs_data);
|
||
|
||
/* 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 should not generate any new
|
||
minimal symbols, since we will have already read the ELF dynamic symbol
|
||
table and normal symbol entries won't be in the ".stab" section; but in
|
||
case it does, it will install them itself. */
|
||
dbx_symfile_read (objfile, 0);
|
||
|
||
do_cleanups (back_to);
|
||
}
|
||
|
||
/* 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).
|
||
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 (struct objfile *objfile, 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->deprecated_sym_stab_info = (struct dbx_symfile_info *)
|
||
xmalloc (sizeof (struct dbx_symfile_info));
|
||
memset (objfile->deprecated_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->objfile_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 ();
|
||
|
||
/* Now, do an incremental load. */
|
||
|
||
processing_acc_compilation = 1;
|
||
dbx_symfile_read (objfile, 0);
|
||
}
|
||
|
||
static const struct sym_fns aout_sym_fns =
|
||
{
|
||
bfd_target_aout_flavour,
|
||
dbx_new_init, /* init anything gbl to entire symtab */
|
||
dbx_symfile_init, /* read initial info, setup for sym_read() */
|
||
dbx_symfile_read, /* read a symbol file into symtab */
|
||
NULL, /* sym_read_psymbols */
|
||
dbx_symfile_finish, /* finished with file, cleanup */
|
||
default_symfile_offsets, /* parse user's offsets to internal form */
|
||
default_symfile_segments, /* Get segment information from a file. */
|
||
NULL,
|
||
default_symfile_relocate, /* Relocate a debug section. */
|
||
&psym_functions
|
||
};
|
||
|
||
void
|
||
_initialize_dbxread (void)
|
||
{
|
||
add_symtab_fns (&aout_sym_fns);
|
||
}
|