124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
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/*
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* File dwarf.c - read dwarf2 information from the ELF modules
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*
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* Copyright (C) 2005, Raphael Junqueira
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <fcntl.h>
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#ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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#endif
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <stdio.h>
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#ifndef PATH_MAX
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#define PATH_MAX MAX_PATH
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#endif
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#include <assert.h>
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#include <stdarg.h>
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#include "windef.h"
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#include "winbase.h"
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#include "winreg.h"
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#include "winnls.h"
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#include "dbghelp_private.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(dbghelp_dwarf);
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/**
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*
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* Main Specs:
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* http://www.eagercon.com/dwarf/dwarf3std.htm
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* http://www.eagercon.com/dwarf/dwarf-2.0.0.pdf
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*
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* dwarf2.h: http://www.hakpetzna.com/b/binutils/dwarf2_8h-source.html
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*
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* example of projects who do dwarf2 parsing:
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* http://www.x86-64.org/cgi-bin/cvsweb.cgi/binutils.dead/binutils/readelf.c?rev=1.1.1.2
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* http://elis.ugent.be/diota/log/ltrace_elf.c
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*/
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typedef struct dwarf2_parse_context_s {
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const unsigned char* data;
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} dwarf2_parse_context_t;
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unsigned long dwarf2_leb128_as_unsigned(dwarf2_parse_context_t* ctx)
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{
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unsigned long ret = 0;
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unsigned char byte;
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unsigned shift = 0;
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assert( NULL != ctx );
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while (1) {
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byte = *(ctx->data);
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ctx->data++;
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ret |= (byte & 0x7f) << shift;
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shift += 7;
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if (0 == (byte & 0x80)) { break ; }
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}
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return ret;
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}
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long dwarf2_leb128_as_signed(dwarf2_parse_context_t* ctx)
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{
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long ret = 0;
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unsigned char byte;
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unsigned shift = 0;
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const unsigned size = sizeof(int) * 8;
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assert( NULL != ctx );
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while (1) {
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byte = *(ctx->data);
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ctx->data++;
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ret |= (byte & 0x7f) << shift;
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shift += 7;
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if (0 == (byte & 0x80)) { break ; }
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}
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/* as spec: sign bit of byte is 2nd high order bit (80x40)
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* -> 0x80 is used as flag.
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*/
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if ((shift < size) && (byte & 0x40)) {
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ret |= - (1 << shift);
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}
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return ret;
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}
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BOOL dwarf2_parse(struct module* module, unsigned long load_offset,
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const unsigned char* debug, unsigned int debug_size,
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const unsigned char* abbrev, unsigned int abbrev_size,
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const unsigned char* str, unsigned int str_sz)
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{
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return FALSE;
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}
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