1/* $NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $ */ 2 3/*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell. 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 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include <machine/asm.h> 36#include "SYS.h" 37 38#if defined(LIBC_SCCS) && !defined(lint) 39#if 0 40 RCSID("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93") 41#else 42 RCSID("$NetBSD: _setjmp.S,v 1.20.34.5 2010/02/03 23:46:47 matt Exp $") 43#endif 44#endif /* LIBC_SCCS and not lint */ 45 46/* 47 * C library -- _setjmp, _longjmp 48 * 49 * _longjmp(a,v) 50 * will generate a "return(v)" from 51 * the last call to 52 * _setjmp(a) 53 * by restoring registers from the stack, 54 * The previous signal state is NOT restored. 55 */ 56 57 .set noreorder 58 59LEAF(_setjmp) 60 REG_PROLOGUE 61 REG_LI v0, _JB_MAGIC__SETJMP # sigcontext magic number 62 REG_S v0, (_JB_MAGIC * SZREG)(a0) 63 REG_S ra, (_JB_REG_RA * SZREG)(a0) 64 /* 65 * From "MIPSpro N32 ABI Handbook", Table 2-1: 66 * Registers s0..s7 are callee-saved. 67 * The sp register is callee-saved. 68 * The fp (or s8) register is callee-saved. 69 * The gp register is callee-saved (for n32/n64). 70 */ 71 REG_S s0, (_JB_REG_S0 * SZREG)(a0) 72 REG_S s1, (_JB_REG_S1 * SZREG)(a0) 73 REG_S s2, (_JB_REG_S2 * SZREG)(a0) 74 REG_S s3, (_JB_REG_S3 * SZREG)(a0) 75 REG_S s4, (_JB_REG_S4 * SZREG)(a0) 76 REG_S s5, (_JB_REG_S5 * SZREG)(a0) 77 REG_S s6, (_JB_REG_S6 * SZREG)(a0) 78 REG_S s7, (_JB_REG_S7 * SZREG)(a0) 79 REG_S sp, (_JB_REG_SP * SZREG)(a0) 80 REG_S s8, (_JB_REG_S8 * SZREG)(a0) 81#if defined(__mips_n32) || defined(__mips_n64) 82 REG_S gp, (_JB_REG_GP * SZREG)(a0) # newabi gp is callee-saved 83#endif 84 /* 85 * From "MIPSpro N32 ABI Handbook", Table 2-1: 86 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 87 * In N64, FP registers F24 .. F31 are callee-saved. 88 * In O32, FP registers F20 .. F23 are callee-saved. 89 */ 90#ifndef __mips_soft_float 91 cfc1 v0, $31 # too bad can't check if FP used 92#if defined(__mips_n64) || defined(__mips_n32) 93 FP_S $f30, (_JB_FPREG_F30 * SZREG)(a0) 94 FP_S $f28, (_JB_FPREG_F28 * SZREG)(a0) 95 FP_S $f26, (_JB_FPREG_F26 * SZREG)(a0) 96 FP_S $f24, (_JB_FPREG_F24 * SZREG)(a0) 97#endif 98#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) 99 FP_S $f22, (_JB_FPREG_F22 * SZREG)(a0) 100 FP_S $f20, (_JB_FPREG_F20 * SZREG)(a0) 101#endif 102#if defined(__mips_o32) || defined(__mips_o64) 103 FP_S $f21, (_JB_FPREG_F21 * SZREG)(a0) 104 FP_S $f23, (_JB_FPREG_F23 * SZREG)(a0) 105#endif 106#if defined(__mips_n64) 107 FP_S $f25, (_JB_FPREG_F25 * SZREG)(a0) 108 FP_S $f27, (_JB_FPREG_F27 * SZREG)(a0) 109 FP_S $f29, (_JB_FPREG_F29 * SZREG)(a0) 110 FP_S $f31, (_JB_FPREG_F31 * SZREG)(a0) 111#endif 112 INT_S v0, (_JB_FPREG_FCSR * SZREG)(a0) 113#endif /* ! __mips_soft_float */ 114 REG_EPILOGUE 115 116 j ra 117 move v0, zero 118END(_setjmp) 119 120LEAF(_longjmp) 121 PIC_PROLOGUE(_longjmp) 122 PTR_SUBU sp, sp, CALLFRAME_SIZ 123 SAVE_GP(CALLFRAME_GP) 124 125 REG_PROLOGUE 126 REG_L v0, (_JB_MAGIC * SZREG)(a0) # get magic number 127 REG_L ra, (_JB_REG_RA * SZREG)(a0) 128 REG_LI t0, _JB_MAGIC__SETJMP 129 bne v0, t0, botch # jump if error 130 PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity 131 /* 132 * From "MIPSpro N32 ABI Handbook", Table 2-1: 133 * Registers s0..s7 are callee-saved. 134 * The sp register is callee-saved. 135 * The fp (or s8) register is callee-saved. 136 * The gp register is callee-saved (for n32/n64). 137 */ 138 REG_L s0, (_JB_REG_S0 * SZREG)(a0) 139 REG_L s1, (_JB_REG_S1 * SZREG)(a0) 140 REG_L s2, (_JB_REG_S2 * SZREG)(a0) 141 REG_L s3, (_JB_REG_S3 * SZREG)(a0) 142 REG_L s4, (_JB_REG_S4 * SZREG)(a0) 143 REG_L s5, (_JB_REG_S5 * SZREG)(a0) 144 REG_L s6, (_JB_REG_S6 * SZREG)(a0) 145 REG_L s7, (_JB_REG_S7 * SZREG)(a0) 146 REG_L sp, (_JB_REG_SP * SZREG)(a0) 147 REG_L s8, (_JB_REG_S8 * SZREG)(a0) 148#if defined(__mips_n32) || defined(__mips_n64) 149 REG_L gp, (_JB_REG_GP * SZREG)(a0) 150#endif 151#ifndef __mips_soft_float 152 # get fpu status 153 INT_L v0, (_JB_FPREG_FCSR * SZREG)(a0) 154 ctc1 v0, $31 155 /* 156 * From "MIPSpro N32 ABI Handbook", Table 2-1: 157 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 158 * In N64, FP registers F24 .. F31 are callee-saved. 159 * In O32, FP registers F20 .. F23 are callee-saved. 160 */ 161#if defined(__mips_n64) || defined(__mips_n32) 162 FP_L $f30, (_JB_FPREG_F30 * SZREG)(a0) 163 FP_L $f28, (_JB_FPREG_F28 * SZREG)(a0) 164 FP_L $f26, (_JB_FPREG_F26 * SZREG)(a0) 165 FP_L $f24, (_JB_FPREG_F24 * SZREG)(a0) 166#endif 167#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) 168 FP_L $f22, (_JB_FPREG_F22 * SZREG)(a0) 169 FP_L $f20, (_JB_FPREG_F20 * SZREG)(a0) 170#endif 171#if defined(__mips_o32) || defined(__mips_o64) 172 FP_L $f21, (_JB_FPREG_F21 * SZREG)(a0) 173 FP_L $f23, (_JB_FPREG_F23 * SZREG)(a0) 174#endif 175#if defined(__mips_n64) 176 FP_L $f25, (_JB_FPREG_F25 * SZREG)(a0) 177 FP_L $f27, (_JB_FPREG_F27 * SZREG)(a0) 178 FP_L $f29, (_JB_FPREG_F29 * SZREG)(a0) 179 FP_L $f31, (_JB_FPREG_F31 * SZREG)(a0) 180#endif 181#endif /* ! __mips_soft_float */ 182 183 REG_EPILOGUE 184 bne a1, zero, 1f 185 move v0, a1 # get return value in 1st arg 186 REG_LI v0, 1 # return 1 if arg is 0 1871: 188 j ra 189 nop 190 191botch: 192 /* 193 * We know we aren't returning so we don't care about restoring 194 * our caller's GP. 195 */ 196 PTR_LA t9, _C_LABEL(longjmperror) 197 jalr t9 198 nop 199 200 PIC_TAILCALL(abort) 201END(_longjmp) 202