typedef	struct	Exec	Exec;struct	Exec{	long	magic;		/* magic number */	long	text;	 	/* size of text segment */	long	data;	 	/* size of initialized data */	long	bss;	  	/* size of uninitialized data */	long	syms;	 	/* size of symbol table */	long	entry;	 	/* entry point */	long	spsz;		/* size of pc/sp offset table */	long	pcsz;		/* size of pc/line number table */}; #define	_MAGIC(b)	((((4*b)+0)*b)+7)#define	A_MAGIC		_MAGIC(8)	/* 68020 */#define	I_MAGIC		_MAGIC(11)	/* intel 386 */#define	J_MAGIC		_MAGIC(12)	/* intel 960 */#define	K_MAGIC		_MAGIC(13)	/* sparc */#define	V_MAGIC		_MAGIC(16)	/* mips 3000 */#define	X_MAGIC		_MAGIC(17)	/* att dsp 3210 */#define	M_MAGIC		_MAGIC(18)	/* mips 4000 */#define	D_MAGIC		_MAGIC(19)	/* amd 29000 */#define	E_MAGIC		_MAGIC(20)	/* arm 7-something */#define	Q_MAGIC		_MAGIC(21)	/* powerpc */#define	N_MAGIC		_MAGIC(22)	/* mips 4000 LE */#define	L_MAGIC		_MAGIC(23)	/* dec alpha */ #define	DYN_MAGIC	0x80000000	/* or'd in for dynamically loaded modules */ typedef	struct	Sym	Sym;struct	Sym{	long	value;	char	type;	char	*name;};