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 19ENTRY(_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 */ 27END(_setjmp) 28 29ENTRY(_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 */ 39END(_longjmp) 40