.sect .text; .sect .rom; .sect .data; .sect .bss.sect .text.define	.xor	! #bytes in ecx.xor:	pop	ebx		! return address	mov	edx,edi	mov	edi,esp	add	edi,ecx	sar	ecx,21:	pop	eax	xor	eax,(edi)	stos	loop	1b	mov	edi,edx	jmp	ebx