setjmp.s

来自「这是一个同样来自贝尔实验室的和UNIX有着渊源的操作系统, 其简洁的设计和实现易」· S 代码 · 共 15 行

TEXT	setjmp(SB), 1, $-8
	MOVL	R30, (R0)
	MOVL	R26, 4(R0)
	MOVQ	$0, R0
	RET

TEXT	longjmp(SB), 1, $-8
	MOVL	r+4(FP), R3
	BNE	R3, ok		/* ansi: "longjmp(0) => longjmp(1)" */
	MOVQ	$1, R3		/* bless their pointed heads */
ok:	MOVL	(R0), R30
	MOVL	4(R0), R26
	MOVL	R3, R0
	RET