1*2fe8fb19SBen Gras/* $NetBSD: _setjmp.S,v 1.2 2006/07/05 18:06:47 ross Exp $ */ 2*2fe8fb19SBen Gras 3*2fe8fb19SBen Gras#include <machine/asm.h> 4*2fe8fb19SBen Gras 5*2fe8fb19SBen Gras#if defined(LIBC_SCCS) 6*2fe8fb19SBen Gras .text 7*2fe8fb19SBen Gras .asciz "$NetBSD: _setjmp.S,v 1.2 2006/07/05 18:06:47 ross Exp $" 8*2fe8fb19SBen Gras#endif 9*2fe8fb19SBen Gras 10*2fe8fb19SBen Gras/* 11*2fe8fb19SBen Gras * C library -- _setjmp, _longjmp 12*2fe8fb19SBen Gras * 13*2fe8fb19SBen Gras * _longjmp(a,v) 14*2fe8fb19SBen Gras * will generate a "return(v?v:1)" from the last call to 15*2fe8fb19SBen Gras * _setjmp(a) 16*2fe8fb19SBen Gras * by restoring registers from the stack. 17*2fe8fb19SBen Gras * The previous signal state is NOT restored. 18*2fe8fb19SBen Gras */ 19*2fe8fb19SBen Gras 20*2fe8fb19SBen GrasENTRY(_setjmp) 21*2fe8fb19SBen Gras mflr %r11 /* save return address */ 22*2fe8fb19SBen Gras mfcr %r12 /* save condition register */ 23*2fe8fb19SBen Gras mr %r10,%r1 /* save stack pointer */ 24*2fe8fb19SBen Gras mr %r9,%r2 /* save GPR2 (not needed) */ 25*2fe8fb19SBen Gras i = 0 26*2fe8fb19SBen Gras .rept 32-9 27*2fe8fb19SBen Gras std 9+i,i*8+16(%r3) 28*2fe8fb19SBen Gras i = i + 1 29*2fe8fb19SBen Gras .endr 30*2fe8fb19SBen Gras li %r3,0 /* indicate success */ 31*2fe8fb19SBen Gras blr /* return */ 32*2fe8fb19SBen Gras 33*2fe8fb19SBen GrasENTRY(_longjmp) 34*2fe8fb19SBen Gras i = 0 35*2fe8fb19SBen Gras .rept 32-9 36*2fe8fb19SBen Gras ld 9+i,i*8+16(%r3) 37*2fe8fb19SBen Gras i = i + 1 38*2fe8fb19SBen Gras .endr 39*2fe8fb19SBen Gras mtlr %r11 /* restore LR */ 40*2fe8fb19SBen Gras mtcr %r12 /* restore CR */ 41*2fe8fb19SBen Gras mr %r2,%r9 /* restore GPR2 (not needed) */ 42*2fe8fb19SBen Gras mr %r1,%r10 /* restore stack */ 43*2fe8fb19SBen Gras or. %r3,%r4,%r4 /* get return value */ 44*2fe8fb19SBen Gras bnelr /* return if not 0 */ 45*2fe8fb19SBen Gras li %r3,1 /* what's the point? */ 46*2fe8fb19SBen Gras blr /* return */ 47