4.4BSD/usr/src/old/lisp/franz/h/dualaout.h

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		/*	%M%	%I%	%E%	*/
/*
 * Header prepended to each a.out file.
 */
struct exec {
	long	a_magic;	/* magic number */
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_trsize;	/* size of text relocation */
unsigned long	a_drsize;	/* size of data relocation */
unsigned long	a_entry;	/* entry point */
};

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

/*
 * Macros which take exec structures as arguments and tell whether
 * the file has a reasonable magic number or offsets to text|symbols|strings.
 */
#define	N_BADMAG(x) \
    (((x).a_magic)!=OMAGIC && ((x).a_magic)!=NMAGIC && ((x).a_magic)!=ZMAGIC)

#define	N_TXTOFF(x) \
	((x).a_magic==ZMAGIC ? 1024 : sizeof (struct exec))
#define N_SYMOFF(x) \
	(N_TXTOFF(x) + (x).a_text+(x).a_data + (x).a_trsize+(x).a_drsize)
#include <a.out.h>