1/* $OpenBSD: setjmp.S,v 1.4 2022/12/08 02:11:27 guenther Exp $ */ 2/* $NetBSD: setjmp.S,v 1.10 2006/01/05 19:21:37 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 "SYS.h" 39 40#include <machine/setjmp.h> 41 42/* 43 * C library -- setjmp, longjmp 44 * 45 * longjmp(a,v) 46 * will generate a "return(v)" from the last call to 47 * setjmp(a) 48 * by restoring registers from the stack. 49 * The previous signal state is restored. 50 */ 51 52ENTRY(setjmp) 53 PIC_PROLOGUE(.L_got_1) 54 sts.l pr, @-sp 55 mov.l r4, @-sp 56 57 mov.l .L_sigprocmask_1, r0 58 mov r4, r6 59 mov #1, r4 /* how = SIG_BLOCK */ 60 mov #0, r5 /* new = NULL */ 611: CALL r0 62 add #4, r6 /* old = &sigmask */ 63 64 mov.l @sp+, r4 65 lds.l @sp+, pr 66 PIC_EPILOGUE 67 68 /* identical to _setjmp except that the first word is non-zero */ 69#if defined(__SH4__) && !defined(__SH4_NOFPU__) 70 add #(_JBLEN * 4), r4 71 sts fpscr, r1 72 xor r0, r0 73 mov.l r1, @-r4 74 lds r0, fpscr 75 sts.l fpul, @-r4 76 fmov.s fr15, @-r4 77 fmov.s fr14, @-r4 78 fmov.s fr13, @-r4 79 fmov.s fr12, @-r4 80 frchg 81 fmov.s fr15, @-r4 82 fmov.s fr14, @-r4 83 fmov.s fr13, @-r4 84 fmov.s fr12, @-r4 85 lds r1, fpscr 86#else 87 add #((_JBLEN - 10) * 4), r4 88#endif 89 sts.l mach, @-r4 90 sts.l macl, @-r4 91 mov.l r15, @-r4 92 mov.l r14, @-r4 93 mov.l r13, @-r4 94 mov.l r12, @-r4 95 mov.l r11, @-r4 96 mov.l r10, @-r4 97 mov.l r9, @-r4 98 mov.l r8, @-r4 99 sts.l pr, @-r4 100 add #-4, r4 /* skip signal mask */ 101 mov #1, r0 102 mov.l r0, @-r4 /* has signal mask */ 103 rts 104 xor r0, r0 105 106 .align 2 107.L_got_1: PIC_GOT_DATUM 108.L_sigprocmask_1: CALL_DATUM(_HIDDEN(sigprocmask), 1b) 109 SET_ENTRY_SIZE(setjmp) 110 111ENTRY(longjmp) 112 /* we won't return here, so we don't need to save pr and r12 */ 113 PIC_PROLOGUE_NOSAVE(.L_got_2) 114 mov.l r5, @-sp 115 mov.l r4, @-sp 116 117 mov.l .L_sigprocmask_2, r0 118 mov r4, r5 119 mov #3, r4 /* how = SIG_SETMASK */ 120 add #4, r5 /* new = &sigmask */ 1211: CALL r0 122 mov #0, r6 /* old = NULL */ 123 124 mov.l @sp+, r4 125 mov.l @sp+, r5 126 127 /* identical to _longjmp */ 128 add #8, r4 129 lds.l @r4+, pr 130 mov.l @r4+, r8 131 mov.l @r4+, r9 132 mov.l @r4+, r10 133 mov.l @r4+, r11 134 mov.l @r4+, r12 135 mov.l @r4+, r13 136 mov.l @r4+, r14 137 mov.l @r4+, r15 138 lds.l @r4+, macl 139 lds.l @r4+, mach 140#if defined(__SH4__) && !defined(__SH4_NOFPU__) 141 xor r0, r0 142 lds r0, fpscr 143 frchg 144 fmov.s @r4+, fr12 145 fmov.s @r4+, fr13 146 fmov.s @r4+, fr14 147 fmov.s @r4+, fr15 148 frchg 149 fmov.s @r4+, fr12 150 fmov.s @r4+, fr13 151 fmov.s @r4+, fr14 152 fmov.s @r4+, fr15 153 lds.l @r4+, fpul 154 lds.l @r4+, fpscr 155#endif 156 157 mov r5, r0 158 tst r0, r0 /* make sure return value is non-zero */ 159 bf .L0 160 add #1, r0 161.L0: 162 rts 163 nop 164 165 .align 2 166.L_got_2: PIC_GOT_DATUM 167.L_sigprocmask_2: CALL_DATUM(_HIDDEN(sigprocmask), 1b) 168 SET_ENTRY_SIZE(longjmp) 169