_setjmp.S revision 1.3
1 /* $NetBSD: _setjmp.S,v 1.3 2022/12/04 17:04:06 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <machine/asm.h> 33 #include "assym.h" 34 35 #if defined(LIBC_SCCS) 36 __RCSID("$NetBSD: _setjmp.S,v 1.3 2022/12/04 17:04:06 skrll Exp $") 37 #endif 38 39 /* 40 * C library -- _setjmp, _longjmp 41 * 42 * _longjmp(a,v) 43 * will generate a "return(v?v:1)" from the last call to 44 * _setjmp(a) 45 * by restoring registers from the stack. 46 * The previous signal state is NOT restored. 47 */ 48 49 ENTRY(_setjmp) 50 REG_S zero, JB_MAGIC(a0) /* indicate no sigmask */ 51 REG_S ra, JB_RA(a0) /* save return address */ 52 REG_S sp, JB_SP(a0) /* save stack pointer */ 53 REG_S gp, JB_GP(a0) /* save global pointer */ 54 REG_S tp, JB_TP(a0) /* save thread pointer */ 55 REG_S s0, JB_S0(a0) /* save callee saved register */ 56 REG_S s1, JB_S1(a0) /* save callee saved register */ 57 REG_S s2, JB_S2(a0) /* save callee saved register */ 58 REG_S s3, JB_S3(a0) /* save callee saved register */ 59 REG_S s4, JB_S4(a0) /* save callee saved register */ 60 REG_S s5, JB_S5(a0) /* save callee saved register */ 61 REG_S s6, JB_S6(a0) /* save callee saved register */ 62 REG_S s7, JB_S7(a0) /* save callee saved register */ 63 REG_S s8, JB_S8(a0) /* save callee saved register */ 64 REG_S s9, JB_S9(a0) /* save callee saved register */ 65 REG_S s10, JB_S10(a0) /* save callee saved register */ 66 REG_S s11, JB_S11(a0) /* save callee saved register */ 67 #ifndef _SOFT_FLOAT 68 frcsr t2 /* get FSCR */ 69 REG_S t2, JB_FCSR(a0) /* save it */ 70 fsd fs0, JB_FS0(a0) /* save callee saved register */ 71 fsd fs1, JB_FS1(a0) /* save callee saved register */ 72 fsd fs2, JB_FS2(a0) /* save callee saved register */ 73 fsd fs3, JB_FS3(a0) /* save callee saved register */ 74 fsd fs4, JB_FS4(a0) /* save callee saved register */ 75 fsd fs5, JB_FS5(a0) /* save callee saved register */ 76 fsd fs6, JB_FS6(a0) /* save callee saved register */ 77 fsd fs7, JB_FS7(a0) /* save callee saved register */ 78 fsd fs8, JB_FS8(a0) /* save callee saved register */ 79 fsd fs9, JB_FS9(a0) /* save callee saved register */ 80 fsd fs10, JB_FS10(a0) /* save callee saved register */ 81 fsd fs11, JB_FS11(a0) /* save callee saved register */ 82 #endif 83 li a0, 0 /* indicate success */ 84 ret /* return */ 85 END(_setjmp) 86 87 ENTRY(_longjmp) 88 REG_L ra, JB_RA(a0) /* save return address */ 89 REG_L sp, JB_SP(a0) /* save stack pointer */ 90 REG_L gp, JB_GP(a0) /* save global pointer */ 91 #REG_L tp, JB_TP(a0) /* save thread pointer */ 92 REG_L s0, JB_S0(a0) /* save callee saved register */ 93 REG_L s1, JB_S1(a0) /* save callee saved register */ 94 REG_L s2, JB_S2(a0) /* save callee saved register */ 95 REG_L s3, JB_S3(a0) /* save callee saved register */ 96 REG_L s4, JB_S4(a0) /* save callee saved register */ 97 REG_L s5, JB_S5(a0) /* save callee saved register */ 98 REG_L s6, JB_S6(a0) /* save callee saved register */ 99 REG_L s7, JB_S7(a0) /* save callee saved register */ 100 REG_L s8, JB_S8(a0) /* save callee saved register */ 101 REG_L s9, JB_S9(a0) /* save callee saved register */ 102 REG_L s10, JB_S10(a0) /* save callee saved register */ 103 REG_L s11, JB_S11(a0) /* save callee saved register */ 104 #ifndef _SOFT_FLOAT 105 REG_L t2, JB_FCSR(a0) /* get it */ 106 fscsr t2 /* restore FSCR */ 107 fld fs0, JB_FS0(a0) /* restore callee saved register */ 108 fld fs1, JB_FS1(a0) /* restore callee saved register */ 109 fld fs2, JB_FS2(a0) /* restore callee saved register */ 110 fld fs3, JB_FS3(a0) /* restore callee saved register */ 111 fld fs4, JB_FS4(a0) /* restore callee saved register */ 112 fld fs5, JB_FS5(a0) /* restore callee saved register */ 113 fld fs6, JB_FS6(a0) /* restore callee saved register */ 114 fld fs7, JB_FS7(a0) /* restore callee saved register */ 115 fld fs8, JB_FS8(a0) /* restore callee saved register */ 116 fld fs9, JB_FS9(a0) /* restore callee saved register */ 117 fld fs10, JB_FS10(a0) /* restore callee saved register */ 118 fld fs11, JB_FS11(a0) /* restore callee saved register */ 119 #endif 120 li a0, 1 /* default return value */ 121 beqz a1, 1f /* test return value */ 122 mv a0, a1 /* use it if not 0 */ 123 1: ret 124 END(_longjmp) 125
Indexes created Sat Oct 18 21:09:54 GMT 2025