_setjmp.S revision 1.1
1 /* $NetBSD: _setjmp.S,v 1.1 2014/09/19 17:36:25 matt 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 1.1 2014/09/19 17:36:25 matt 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 s0, JB_S0(a0) /* save callee saved register */ 53 REG_S s1, JB_S1(a0) /* save callee saved register */ 54 REG_S s2, JB_S2(a0) /* save callee saved register */ 55 REG_S s3, JB_S3(a0) /* save callee saved register */ 56 REG_S s4, JB_S4(a0) /* save callee saved register */ 57 REG_S s5, JB_S5(a0) /* save callee saved register */ 58 REG_S s6, JB_S6(a0) /* save callee saved register */ 59 REG_S s7, JB_S7(a0) /* save callee saved register */ 60 REG_S s8, JB_S8(a0) /* save callee saved register */ 61 REG_S s9, JB_S9(a0) /* save callee saved register */ 62 REG_S s10, JB_S10(a0) /* save callee saved register */ 63 REG_S s11, JB_S11(a0) /* save callee saved register */ 64 REG_S sp, JB_SP(a0) /* save stack pointer */ 65 REG_S tp, JB_TP(a0) /* save thread pointer */ 66 REG_S gp, JB_GP(a0) /* save global pointer */ 67 #ifndef _SOFT_FLOAT 68 frcsr t2 /* get FSCR */ 69 REG_S t2, JB_FCSR(a0) /* save it */ 70 fsd fs0, JB_F0(a0) /* save callee saved register */ 71 fsd fs1, JB_F1(a0) /* save callee saved register */ 72 fsd fs2, JB_F2(a0) /* save callee saved register */ 73 fsd fs3, JB_F3(a0) /* save callee saved register */ 74 fsd fs4, JB_F4(a0) /* save callee saved register */ 75 fsd fs5, JB_F5(a0) /* save callee saved register */ 76 fsd fs6, JB_F6(a0) /* save callee saved register */ 77 fsd fs7, JB_F7(a0) /* save callee saved register */ 78 fsd fs8, JB_F8(a0) /* save callee saved register */ 79 fsd fs9, JB_F9(a0) /* save callee saved register */ 80 fsd fs10, JB_F10(a0) /* save callee saved register */ 81 fsd fs11, JB_F11(a0) /* save callee saved register */ 82 fsd fs12, JB_F12(a0) /* save callee saved register */ 83 fsd fs13, JB_F13(a0) /* save callee saved register */ 84 fsd fs14, JB_F14(a0) /* save callee saved register */ 85 fsd fs15, JB_F15(a0) /* save callee saved register */ 86 #endif 87 li x1, 0 /* indicate success */ 88 ret /* return */ 89 END(_setjmp) 90 91 ENTRY(_longjmp) 92 REG_L ra, JB_RA(a0) /* save return address */ 93 REG_L s0, JB_S0(a0) /* save callee saved register */ 94 REG_L s1, JB_S1(a0) /* save callee saved register */ 95 REG_L s2, JB_S2(a0) /* save callee saved register */ 96 REG_L s3, JB_S3(a0) /* save callee saved register */ 97 REG_L s4, JB_S4(a0) /* save callee saved register */ 98 REG_L s5, JB_S5(a0) /* save callee saved register */ 99 REG_L s6, JB_S6(a0) /* save callee saved register */ 100 REG_L s7, JB_S7(a0) /* save callee saved register */ 101 REG_L s8, JB_S8(a0) /* save callee saved register */ 102 REG_L s9, JB_S9(a0) /* save callee saved register */ 103 REG_L s10, JB_S10(a0) /* save callee saved register */ 104 REG_L s11, JB_S11(a0) /* save callee saved register */ 105 REG_L sp, JB_SP(a0) /* save stack pointer */ 106 #REG_L tp, JB_TP(a0) /* save thread pointer */ 107 REG_L gp, JB_GP(a0) /* save global pointer */ 108 #ifndef _SOFT_FLOAT 109 REG_L t2, JB_FCSR(a0) /* get it */ 110 fscsr t2 /* restore FSCR */ 111 fld fs0, JB_F0(a0) /* restore callee saved register */ 112 fld fs1, JB_F1(a0) /* restore callee saved register */ 113 fld fs2, JB_F2(a0) /* restore callee saved register */ 114 fld fs3, JB_F3(a0) /* restore callee saved register */ 115 fld fs4, JB_F4(a0) /* restore callee saved register */ 116 fld fs5, JB_F5(a0) /* restore callee saved register */ 117 fld fs6, JB_F6(a0) /* restore callee saved register */ 118 fld fs7, JB_F7(a0) /* restore callee saved register */ 119 fld fs8, JB_F8(a0) /* restore callee saved register */ 120 fld fs9, JB_F9(a0) /* restore callee saved register */ 121 fld fs10, JB_F10(a0) /* restore callee saved register */ 122 fld fs11, JB_F11(a0) /* restore callee saved register */ 123 fld fs12, JB_F12(a0) /* restore callee saved register */ 124 fld fs13, JB_F13(a0) /* restore callee saved register */ 125 fld fs14, JB_F14(a0) /* restore callee saved register */ 126 fld fs15, JB_F15(a0) /* restore callee saved register */ 127 #endif 128 li v0, 1 /* default return value */ 129 beqz a1, 1f /* test return value */ 130 move v0, a1 /* use it if not 0 */ 131 1: ret 132 END(_longjmp) 133
Indexes created Fri Oct 17 23:09:53 GMT 2025