em_dup.s

来自「MINIX2.0操作系统源码,是Linux的前身,世界上最小的32位操作系统」· S 代码 · 共 18 行

.sect .text; .sect .rom; .sect .data; .sect .bss
.define	.dup

	! #bytes in ecx
	.sect .text
.dup:
	pop	ebx		! return address
	mov	eax,esi
	mov	edx,edi
	mov	esi,esp
	sub	esp,ecx
	mov	edi,esp
	sar	ecx,2
	rep movs
	mov	esi,eax
	mov	edi,edx
	jmp	ebx