/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is ``elf_symbol_table''
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corp.  Portions created by the Initial Developer are
 * Copyright (C) 2001 the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Chris Waterson <waterson@netscape.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include <fstream>
#include "elf_utils.h"

int
elf_verify_header(const Elf32_Ehdr *hdr)
{
    if (hdr->e_ident[EI_MAG0] != ELFMAG0
        || hdr->e_ident[EI_MAG1] != ELFMAG1
        || hdr->e_ident[EI_MAG2] != ELFMAG2
        || hdr->e_ident[EI_MAG3] != ELFMAG3) {
        cerr << "not an elf file" << endl;
        return -1;
    }

    if (hdr->e_ident[EI_CLASS] != ELFCLASS32) {
        cerr << "not a 32-bit elf file" << endl;
        return -1;
    }

    if (hdr->e_ident[EI_DATA] != ELFDATA2LSB) {
        cerr << "not a little endian elf file" << endl;
        return -1;
    }

    if (hdr->e_ident[EI_VERSION] != EV_CURRENT) {
        cerr << "incompatible version" << endl;
        return -1;
    }

    return 0;
}