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/* $NetBSD: _setjmp.S,v 1.3 2011/01/15 07:31:12 matt Exp $ */
#include <machine/asm.h>
#if defined(LIBC_SCCS)
__RCSID("$NetBSD: _setjmp.S,v 1.3 2011/01/15 07:31:12 matt Exp $")
#endif
/*
* C library -- _setjmp, _longjmp
*
* _longjmp(a,v)
* will generate a "return(v?v:1)" from the last call to
* _setjmp(a)
* by restoring registers from the stack.
* The previous signal state is NOT restored.
*/
ENTRY(_setjmp)
mflr %r11 /* save return address */
mfcr %r12 /* save condition register */
mr %r10,%r1 /* save stack pointer */
mr %r9,%r2 /* save GPR2 (not needed) */
stmw %r9,8(%r3) /* save r9..r31 */
li %r3,0 /* indicate success */
blr /* return */
END(_setjmp)
ENTRY(_longjmp)
lmw %r9,8(%r3) /* save r9..r31 */
mtlr %r11 /* restore LR */
mtcr %r12 /* restore CR */
mr %r2,%r9 /* restore GPR2 (not needed) */
mr %r1,%r10 /* restore stack */
or. %r3,%r4,%r4 /* get return value */
bnelr /* return if not 0 */
li %r3,1 /* what's the point? */
blr /* return */
END(_longjmp)
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