1/* $OpenBSD: _setjmp.S,v 1.2 2007/03/02 06:11:54 miod Exp $ */ 2/* $NetBSD: _setjmp.S,v 1.7 2006/01/05 02:04:41 uwe Exp $ */ 3 4/*- 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: @(#)_setjmp.s 5.1 (Berkeley) 4/23/90 36 */ 37 38#include <machine/asm.h> 39#include <machine/setjmp.h> 40 41/* 42 * C library -- _setjmp, _longjmp 43 * 44 * _longjmp(a,v) 45 * will generate a "return(v)" from the last call to 46 * _setjmp(a) 47 * by restoring registers from the stack. 48 * The previous signal state is NOT restored. 49 */ 50 51ENTRY(_setjmp) 52 xor r0, r0 53#if defined(__SH4__) && !defined(__SH4_NOFPU__) 54 add #(_JBLEN * 4), r4 55 sts fpscr, r1 56 mov.l r1, @-r4 57 lds r0, fpscr 58 sts.l fpul, @-r4 59 fmov.s fr15, @-r4 60 fmov.s fr14, @-r4 61 fmov.s fr13, @-r4 62 fmov.s fr12, @-r4 63 frchg 64 fmov.s fr15, @-r4 65 fmov.s fr14, @-r4 66 fmov.s fr13, @-r4 67 fmov.s fr12, @-r4 68 lds r1, fpscr 69#else 70 add #((_JBLEN - 10) * 4), r4 71#endif 72 sts.l mach, @-r4 73 sts.l macl, @-r4 74 mov.l r15, @-r4 75 mov.l r14, @-r4 76 mov.l r13, @-r4 77 mov.l r12, @-r4 78 mov.l r11, @-r4 79 mov.l r10, @-r4 80 mov.l r9, @-r4 81 mov.l r8, @-r4 82 sts.l pr, @-r4 83 mov.l r0, @-r4 /* dummy signal mask */ 84 rts 85 mov.l r0, @-r4 /* no saved signal mask */ 86 SET_ENTRY_SIZE(_setjmp) 87 88ENTRY(_longjmp) 89 add #8, r4 90 lds.l @r4+, pr 91 mov.l @r4+, r8 92 mov.l @r4+, r9 93 mov.l @r4+, r10 94 mov.l @r4+, r11 95 mov.l @r4+, r12 96 mov.l @r4+, r13 97 mov.l @r4+, r14 98 mov.l @r4+, r15 99 lds.l @r4+, macl 100 lds.l @r4+, mach 101#if defined(__SH4__) && !defined(__SH4_NOFPU__) 102 xor r0, r0 103 lds r0, fpscr 104 frchg 105 fmov.s @r4+, fr12 106 fmov.s @r4+, fr13 107 fmov.s @r4+, fr14 108 fmov.s @r4+, fr15 109 frchg 110 fmov.s @r4+, fr12 111 fmov.s @r4+, fr13 112 fmov.s @r4+, fr14 113 fmov.s @r4+, fr15 114 lds.l @r4+, fpul 115 lds.l @r4+, fpscr 116#endif 117 118 mov r5, r0 119 tst r0, r0 120 bf .L0 121 add #1, r0 122.L0: 123 rts 124 nop 125 SET_ENTRY_SIZE(_longjmp) 126