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https://github.com/davea42/libdwarf-code.git
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f5650ae6ec
are caught so we avoid some coredumps. Such strings in DWARF are created by 'fuzzing' or by a bug in a compiler or linker. libdwarf/dwarf_error.c libdwarf/dwarf_form.c libdwarf/dwarf_frame.c libdwarf/dwarf_frame.h libdwarf/dwarf_frame2.c libdwarf/dwarf_global.c libdwarf/dwarf_line.c libdwarf/dwarf_macro.c libdwarf/dwarf_string.c libdwarf/dwarf_util.c libdwarf/dwarf_util.h libdwarf/libdwarf.h.in
83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
/*
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Copyright (C) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
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Portions Copyright (C) 2009-2011 David Anderson. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it
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under the terms of version 2.1 of the GNU Lesser General Public License
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as published by the Free Software Foundation.
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This program is distributed in the hope that it would be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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Further, this software is distributed without any warranty that it is
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free of the rightful claim of any third person regarding infringement
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or the like. Any license provided herein, whether implied or
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otherwise, applies only to this software file. Patent licenses, if
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any, provided herein do not apply to combinations of this program with
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other software, or any other product whatsoever.
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You should have received a copy of the GNU Lesser General Public
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License along with this program; if not, write the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston MA 02110-1301,
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USA.
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*/
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#include "config.h"
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#include "dwarf_incl.h"
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int
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dwarf_get_str(Dwarf_Debug dbg,
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Dwarf_Off offset,
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char **string,
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Dwarf_Signed * returned_str_len, Dwarf_Error * error)
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{
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int res = DW_DLV_ERROR;
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void *secptr = 0;
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void *begin = 0;
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void *end = 0;
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if (dbg == NULL) {
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_dwarf_error(NULL, error, DW_DLE_DBG_NULL);
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return (DW_DLV_ERROR);
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}
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if (offset == dbg->de_debug_str.dss_size) {
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/* Normal (if we've iterated thru the set of strings using
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dwarf_get_str and are at the end). */
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return DW_DLV_NO_ENTRY;
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}
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if (offset > dbg->de_debug_str.dss_size) {
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_dwarf_error(dbg, error, DW_DLE_DEBUG_STR_OFFSET_BAD);
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return (DW_DLV_ERROR);
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}
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if (string == NULL) {
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_dwarf_error(dbg, error, DW_DLE_STRING_PTR_NULL);
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return (DW_DLV_ERROR);
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}
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res = _dwarf_load_section(dbg, &dbg->de_debug_str,error);
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if (res != DW_DLV_OK) {
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return res;
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}
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if (!dbg->de_debug_str.dss_size) {
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return (DW_DLV_NO_ENTRY);
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}
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secptr =dbg->de_debug_str.dss_data;
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begin = (char *)secptr + offset;
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end = (char *)secptr + dbg->de_debug_str.dss_size;
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res = _dwarf_check_string_valid(dbg,secptr,begin,end,error);
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if (res != DW_DLV_OK) {
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return res;
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}
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*string = (char *) begin;
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*returned_str_len = strlen(*string);
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return DW_DLV_OK;
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}
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