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_setjmp.S revision 1.1 
      1 /*	$NetBSD: _setjmp.S,v 1.1 2006/07/01 16:37:20 ross Exp $	*/
      2 
      3 #include <machine/asm.h>
      4 
      5 #if defined(LIBC_SCCS)
      6 	.text
      7 	.asciz "$NetBSD: _setjmp.S,v 1.1 2006/07/01 16:37:20 ross Exp $"
      8 #endif
      9 
     10 /*
     11  * C library -- _setjmp, _longjmp
     12  *
     13  *	_longjmp(a,v)
     14  * will generate a "return(v?v:1)" from the last call to
     15  *	_setjmp(a)
     16  * by restoring registers from the stack.
     17  * The previous signal state is NOT restored.
     18  */
     19 
     20 ENTRY(_setjmp)
     21 	mflr	%r11			/* save return address */
     22 	mfcr	%r12			/* save condition register */
     23 	mr	%r10,%r1		/* save stack pointer */
     24 	mr	%r9,%r2			/* save GPR2 (not needed) */
     25 	stmd	%r9,16(%r3)		/* save r9..r31 */
     26 	li	%r3,0			/* indicate success */
     27 	blr				/* return */
     28 
     29 ENTRY(_longjmp)
     30 	lmd	%r9,16(%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