/* msdos.h  -  MS-DOS and derived executable header information

  Copyright (C) 1999-2024 Free Software Foundation, Inc.

  This file is part of BFD, the Binary File Descriptor library.

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software Foundation,
  Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
#ifndef _MSDOS_H
#define _MSDOS_H

#define IMAGE_DOS_SIGNATURE     0x5a4d          /* MZ */
#define IMAGE_OS2_SIGNATURE     0x454e          /* NE */
#define IMAGE_OS2_SIGNATURE_LE  0x454c          /* LE */
#define IMAGE_OS2_SIGNATURE_LX  0x584c          /* LX */
#define IMAGE_NT_SIGNATURE      0x00004550      /* PE\0\0 */

struct external_DOS_hdr
{
 /* DOS header fields - always at offset zero in the EXE file.  */
 char e_magic[2];              /* Magic number.  */
 char e_cblp[2];               /* Bytes on last page of file.  */
 char e_cp[2];                 /* Pages in file.  */
 char e_crlc[2];               /* Relocations.  */
 char e_cparhdr[2];            /* Size of header in paragraphs.  */
 char e_minalloc[2];           /* Minimum extra paragraphs needed.  */
 char e_maxalloc[2];           /* Maximum extra paragraphs needed.  */
 char e_ss[2];                 /* Initial (relative) SS value.  */
 char e_sp[2];                 /* Initial SP value.  */
 char e_csum[2];               /* Checksum.  */
 char e_ip[2];                 /* Initial IP value.  */
 char e_cs[2];                 /* Initial (relative) CS value.  */
 char e_lfarlc[2];             /* File address of relocation table.  */
 char e_ovno[2];               /* Overlay number.  */
 char e_res[4][2];             /* Reserved words, all 0x0.  */
 char e_oemid[2];              /* OEM identifier.  */
 char e_oeminfo[2];            /* OEM information.  */
 char e_res2[10][2];           /* Reserved words, all 0x0.  */
 char e_lfanew[4];             /* File address of new exe header, usually 0x80.  */
 char dos_message[64];         /* Other stuff, always follow DOS header.  */
};

/* The actual DOS header only includes up to the e_ovno field.  */
#define DOS_HDR_SIZE            (offsetof (struct external_DOS_hdr, e_res))

#endif /* _MSDOS_H */

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