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      1 /*	$NetBSD: _setjmp.S,v 1.3 2011/01/15 07:31:12 matt Exp $	*/
      2 
      3 #include <machine/asm.h>
      4 
      5 #if defined(LIBC_SCCS)
      6 __RCSID("$NetBSD: _setjmp.S,v 1.3 2011/01/15 07:31:12 matt Exp $")
      7 #endif
      8 
      9 /*
     10  * C library -- _setjmp, _longjmp
     11  *
     12  *	_longjmp(a,v)
     13  * will generate a "return(v?v:1)" from the last call to
     14  *	_setjmp(a)
     15  * by restoring registers from the stack.
     16  * The previous signal state is NOT restored.
     17  */
     18 
     19 ENTRY(_setjmp)
     20 	mflr	%r11			/* save return address */
     21 	mfcr	%r12			/* save condition register */
     22 	mr	%r10,%r1		/* save stack pointer */
     23 	mr	%r9,%r2			/* save GPR2 (not needed) */
     24 	stmw	%r9,8(%r3)		/* save r9..r31 */
     25 	li	%r3,0			/* indicate success */
     26 	blr				/* return */
     27 END(_setjmp)
     28 
     29 ENTRY(_longjmp)
     30 	lmw	%r9,8(%r3)		/* save r9..r31 */
     31 	mtlr	%r11			/* restore LR */
     32 	mtcr	%r12			/* restore CR */
     33 	mr	%r2,%r9			/* restore GPR2 (not needed) */
     34 	mr	%r1,%r10		/* restore stack */
     35 	or.	%r3,%r4,%r4		/* get return value */
     36 	bnelr				/* return if not 0 */
     37 	li	%r3,1			/* what's the point? */
     38 	blr				/* return */
     39 END(_longjmp)
     40