_setjmp.S revision 1.23
1 /* $NetBSD: _setjmp.S,v 1.23 2011/03/09 16:10:29 tsutsui 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/cdefs.h> 36 #include <mips/regnum.h> 37 #include <mips/asm.h> 38 #include <machine/setjmp.h> 39 #include <machine/signal.h> /* XXX */ 40 41 #include "assym.h" 42 43 #include "SYS.h" 44 45 #if defined(LIBC_SCCS) && !defined(lint) 46 #if 0 47 RCSID("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93") 48 #else 49 RCSID("$NetBSD: _setjmp.S,v 1.23 2011/03/09 16:10:29 tsutsui Exp $") 50 #endif 51 #endif /* LIBC_SCCS and not lint */ 52 53 /* 54 * C library -- _setjmp, _longjmp 55 * 56 * _longjmp(a,v) 57 * will generate a "return(v)" from 58 * the last call to 59 * _setjmp(a) 60 * by restoring registers from the stack, 61 * The previous signal state is NOT restored. 62 */ 63 64 .set noreorder 65 66 LEAF(_setjmp) 67 REG_PROLOGUE 68 REG_LI v0, 0xACEDBADE # sigcontext magic number 69 REG_S ra, _OFFSETOF_SC_PC(a0) # sc_pc = return address 70 REG_S v0, _OFFSETOF_SC_REGS(a0) # saved in sc_regs[0] 71 REG_S s0, _OFFSETOF_SC_REGS_S0(a0) 72 REG_S s1, _OFFSETOF_SC_REGS_S1(a0) 73 REG_S s2, _OFFSETOF_SC_REGS_S2(a0) 74 REG_S s3, _OFFSETOF_SC_REGS_S3(a0) 75 REG_S s4, _OFFSETOF_SC_REGS_S4(a0) 76 REG_S s5, _OFFSETOF_SC_REGS_S5(a0) 77 REG_S s6, _OFFSETOF_SC_REGS_S6(a0) 78 REG_S s7, _OFFSETOF_SC_REGS_S7(a0) 79 REG_S sp, _OFFSETOF_SC_REGS_SP(a0) 80 REG_S s8, _OFFSETOF_SC_REGS_S8(a0) 81 #if defined(__mips_n32) || defined(__mips_n64) 82 REG_S gp, _OFFSETOF_SC_REGS_GP(a0) # newabi gp is callee-saved 83 #endif 84 /* 85 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 86 * In N64, FP registers F23 .. F31 are callee-saved. 87 * In O32, FP registers F20 .. F23 are callee-saved. 88 */ 89 #ifndef SOFTFLOAT_FOR_GCC 90 cfc1 v0, $31 # too bad cant check if FP used 91 #if defined(__mips_n64) || defined(__mips_n32) 92 FP_S $f30, _OFFSETOF_SC_FPREGS_F30(a0) 93 FP_S $f28, _OFFSETOF_SC_FPREGS_F28(a0) 94 FP_S $f26, _OFFSETOF_SC_FPREGS_F26(a0) 95 FP_S $f24, _OFFSETOF_SC_FPREGS_F24(a0) 96 #endif 97 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) 98 FP_S $f22, _OFFSETOF_SC_FPREGS_F22(a0) 99 FP_S $f20, _OFFSETOF_SC_FPREGS_F20(a0) 100 #endif 101 #if defined(__mips_o32) || defined(__mips_o64) 102 FP_S $f21, _OFFSETOF_SC_FPREGS_F21(a0) 103 FP_S $f23, _OFFSETOF_SC_FPREGS_F23(a0) 104 #endif 105 #if defined(__mips_n64) 106 FP_S $f25, _OFFSETOF_SC_FPREGS_F25(a0) 107 FP_S $f27, _OFFSETOF_SC_FPREGS_F27(a0) 108 FP_S $f29, _OFFSETOF_SC_FPREGS_F29(a0) 109 FP_S $f31, _OFFSETOF_SC_FPREGS_F31(a0) 110 #endif 111 INT_S v0, _OFFSETOF_SC_FPREGS_FCSR(a0) 112 #endif /* SOFTFLOAT_FOR_GCC */ 113 REG_EPILOGUE 114 115 j ra 116 move v0, zero 117 END(_setjmp) 118 119 LEAF(_longjmp) 120 PIC_PROLOGUE(_longjmp) 121 PTR_SUBU sp, sp, CALLFRAME_SIZ 122 SAVE_GP(CALLFRAME_GP) 123 124 REG_PROLOGUE 125 REG_L v0, _OFFSETOF_SC_REGS(a0) # get magic number 126 REG_L ra, _OFFSETOF_SC_PC(a0) 127 REG_LI t0, 0xACEDBADE 128 bne v0, t0, botch # jump if error 129 PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity 130 REG_S a1, _OFFSETOF_SC_REGS_V0(a0) # save return value 131 REG_L s0, _OFFSETOF_SC_REGS_S0(a0) 132 REG_L s1, _OFFSETOF_SC_REGS_S1(a0) 133 REG_L s2, _OFFSETOF_SC_REGS_S2(a0) 134 REG_L s3, _OFFSETOF_SC_REGS_S3(a0) 135 REG_L s4, _OFFSETOF_SC_REGS_S4(a0) 136 REG_L s5, _OFFSETOF_SC_REGS_S5(a0) 137 REG_L s6, _OFFSETOF_SC_REGS_S6(a0) 138 REG_L s7, _OFFSETOF_SC_REGS_S7(a0) 139 #if defined(__mips_n32) || defined(__mips_n64) 140 REG_L gp, _OFFSETOF_SC_REGS_GP(a0) 141 #endif 142 #ifndef SOFTFLOAT_FOR_GCC 143 # get fpu status 144 INT_L v0, _OFFSETOF_SC_FPREGS_FCSR(a0) 145 #endif 146 REG_L sp, _OFFSETOF_SC_REGS_SP(a0) 147 REG_L s8, _OFFSETOF_SC_REGS_S8(a0) 148 #ifndef SOFTFLOAT_FOR_GCC 149 ctc1 v0, $31 150 /* 151 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 152 * In N64, FP registers F23 .. F31 are callee-saved. 153 * In O32, FP registers F20 .. F23 are callee-saved. 154 */ 155 #if defined(__mips_n64) || defined(__mips_n32) 156 FP_L $f30, _OFFSETOF_SC_FPREGS_F30(a0) 157 FP_L $f28, _OFFSETOF_SC_FPREGS_F28(a0) 158 FP_L $f26, _OFFSETOF_SC_FPREGS_F26(a0) 159 FP_L $f24, _OFFSETOF_SC_FPREGS_F24(a0) 160 #endif 161 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) 162 FP_L $f22, _OFFSETOF_SC_FPREGS_F22(a0) 163 FP_L $f20, _OFFSETOF_SC_FPREGS_F20(a0) 164 #endif 165 #if defined(__mips_o32) || defined(__mips_o64) 166 FP_L $f21, _OFFSETOF_SC_FPREGS_F21(a0) 167 FP_L $f23, _OFFSETOF_SC_FPREGS_F23(a0) 168 #endif 169 #if defined(__mips_n64) 170 FP_L $f25, _OFFSETOF_SC_FPREGS_F25(a0) 171 FP_L $f27, _OFFSETOF_SC_FPREGS_F27(a0) 172 FP_L $f29, _OFFSETOF_SC_FPREGS_F29(a0) 173 FP_L $f31, _OFFSETOF_SC_FPREGS_F31(a0) 174 #endif 175 #endif /* SOFTFLOAT_FOR_GCC */ 176 177 REG_EPILOGUE 178 move v0, a1 # get return value in 1st arg 179 j ra 180 nop 181 182 botch: 183 /* 184 * We know we aren't returning so we don't care about restoring 185 * our caller's GP. 186 */ 187 jal _C_LABEL(longjmperror) 188 nop 189 190 PIC_TAILCALL(abort) 191 nop 192 END(_longjmp) 193
Indexes created Wed Oct 22 00:09:40 GMT 2025