1 /* msdos.h - MS-DOS and derived executable header information 2 3 Copyright (C) 1999-2020 Free Software Foundation, Inc. 4 5 This file is part of BFD, the Binary File Descriptor library. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software Foundation, 19 Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 20 #ifndef _MSDOS_H 21 #define _MSDOS_H 22 23 #define IMAGE_DOS_SIGNATURE 0x5a4d /* MZ */ 24 #define IMAGE_OS2_SIGNATURE 0x454e /* NE */ 25 #define IMAGE_OS2_SIGNATURE_LE 0x454c /* LE */ 26 #define IMAGE_OS2_SIGNATURE_LX 0x584c /* LX */ 27 #define IMAGE_NT_SIGNATURE 0x00004550 /* PE\0\0 */ 28 29 struct external_DOS_hdr 30 { 31 /* DOS header fields - always at offset zero in the EXE file. */ 32 char e_magic[2]; /* Magic number. */ 33 char e_cblp[2]; /* Bytes on last page of file. */ 34 char e_cp[2]; /* Pages in file. */ 35 char e_crlc[2]; /* Relocations. */ 36 char e_cparhdr[2]; /* Size of header in paragraphs. */ 37 char e_minalloc[2]; /* Minimum extra paragraphs needed. */ 38 char e_maxalloc[2]; /* Maximum extra paragraphs needed. */ 39 char e_ss[2]; /* Initial (relative) SS value. */ 40 char e_sp[2]; /* Initial SP value. */ 41 char e_csum[2]; /* Checksum. */ 42 char e_ip[2]; /* Initial IP value. */ 43 char e_cs[2]; /* Initial (relative) CS value. */ 44 char e_lfarlc[2]; /* File address of relocation table. */ 45 char e_ovno[2]; /* Overlay number. */ 46 char e_res[4][2]; /* Reserved words, all 0x0. */ 47 char e_oemid[2]; /* OEM identifier. */ 48 char e_oeminfo[2]; /* OEM information. */ 49 char e_res2[10][2]; /* Reserved words, all 0x0. */ 50 char e_lfanew[4]; /* File address of new exe header, usually 0x80. */ 51 char dos_message[16][4]; /* Other stuff, always follow DOS header. */ 52 }; 53 54 /* The actual DOS header only includes up to the e_ovno field. */ 55 #define DOS_HDR_SIZE (offsetof (struct external_DOS_hdr, e_res)) 56 57 #endif /* _MSDOS_H */ 58