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