usr/src/sys/sys/exec.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)exec.h      7.2 (Berkeley) 5/9/90
 */

/*
 * Header prepended to each a.out file.
 */
struct exec {
#if !defined(vax) && !defined(tahoe)
unsigned short  a_mid;          /* machine ID */
unsigned short  a_magic;        /* magic number */
#else
         long   a_magic;        /* magic number */
#endif
unsigned long   a_text;         /* size of text segment */
unsigned long   a_data;         /* size of initialized data */
unsigned long   a_bss;          /* size of uninitialized data */
unsigned long   a_syms;         /* size of symbol table */
unsigned long   a_entry;        /* entry point */
unsigned long   a_trsize;       /* size of text relocation */
unsigned long   a_drsize;       /* size of data relocation */
};
#define a_machtype      a_mid   /* SUN compatibility */

/* a_magic */
#define OMAGIC  0407            /* old impure format */
#define NMAGIC  0410            /* read-only text */
#define ZMAGIC  0413            /* demand load format */

/* a_mid */
#define MID_ZERO        0       /* unknown - implementation dependent */
#define MID_SUN010      1       /* sun 68010/68020 binary */
#define MID_SUN020      2       /* sun 68020-only binary */
#define MID_HP200       200     /* hp200 (68010) BSD binary */
#define MID_HP300       300     /* hp300 (68020+68881) BSD binary */
#define MID_HPUX        0x20C   /* hp200/300 HP-UX binary */
#define MID_HPUX800     0x20B   /* hp800 HP-UX binary */