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 20ENTRY(_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 i = 0 26 .rept 32-9 27 std 9+i,i*8+16(%r3) 28 i = i + 1 29 .endr 30 li %r3,0 /* indicate success */ 31 blr /* return */ 32 33ENTRY(_longjmp) 34 i = 0 35 .rept 32-9 36 ld 9+i,i*8+16(%r3) 37 i = i + 1 38 .endr 39 mtlr %r11 /* restore LR */ 40 mtcr %r12 /* restore CR */ 41 mr %r2,%r9 /* restore GPR2 (not needed) */ 42 mr %r1,%r10 /* restore stack */ 43 or. %r3,%r4,%r4 /* get return value */ 44 bnelr /* return if not 0 */ 45 li %r3,1 /* what's the point? */ 46 blr /* return */ 47