_setjmp.S revision 1.21
1 /* $NetBSD: _setjmp.S,v 1.21 2009/12/14 01:07:42 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/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 1.21 2009/12/14 01:07:42 matt 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 a1, _OFFSETOF_SC_REGS_V0(a0) # save return value 72 REG_S s0, _OFFSETOF_SC_REGS_S0(a0) 73 REG_S s1, _OFFSETOF_SC_REGS_S1(a0) 74 REG_S s2, _OFFSETOF_SC_REGS_S2(a0) 75 REG_S s3, _OFFSETOF_SC_REGS_S3(a0) 76 REG_S s4, _OFFSETOF_SC_REGS_S4(a0) 77 REG_S s5, _OFFSETOF_SC_REGS_S5(a0) 78 REG_S s6, _OFFSETOF_SC_REGS_S6(a0) 79 REG_S s7, _OFFSETOF_SC_REGS_S7(a0) 80 REG_S sp, _OFFSETOF_SC_REGS_SP(a0) 81 REG_S s8, _OFFSETOF_SC_REGS_S8(a0) 82 #if defined(__mips_n32) || defined(__mips_n64) 83 REG_S gp, _OFFSETOF_SC_REGS_GP(a0) # newabi gp is callee-saved 84 #endif 85 cfc1 v0, $31 # too bad cant check if FP used 86 /* 87 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 88 * In N64, FP registers F23 .. F31 are callee-saved. 89 * In O32, FP registers F20 .. F23 are callee-saved. 90 */ 91 #ifndef SOFTFLOAT_FOR_GCC 92 #if defined(__mips_n64) || defined(__mips_n32) 93 FP_S $f30, _OFFSETOF_SC_FPREGS_F30(a0) 94 FP_S $f28, _OFFSETOF_SC_FPREGS_F28(a0) 95 FP_S $f26, _OFFSETOF_SC_FPREGS_F26(a0) 96 FP_S $f24, _OFFSETOF_SC_FPREGS_F24(a0) 97 #endif 98 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) 99 FP_S $f22, _OFFSETOF_SC_FPREGS_F22(a0) 100 FP_S $f20, _OFFSETOF_SC_FPREGS_F20(a0) 101 #endif 102 #if defined(__mips_o32) || defined(__mips_o64) 103 FP_S $f21, _OFFSETOF_SC_FPREGS_F21(a0) 104 FP_S $f23, _OFFSETOF_SC_FPREGS_F23(a0) 105 #endif 106 #if defined(__mips_n64) 107 FP_S $f25, _OFFSETOF_SC_FPREGS_F25(a0) 108 FP_S $f27, _OFFSETOF_SC_FPREGS_F27(a0) 109 FP_S $f29, _OFFSETOF_SC_FPREGS_F29(a0) 110 FP_S $f31, _OFFSETOF_SC_FPREGS_F31(a0) 111 #endif 112 #endif /* SOFTFLOAT_FOR_GCC */ 113 INT_S v0, _OFFSETOF_SC_FPREGS_FCSR(a0) 114 REG_EPILOGUE 115 116 j ra 117 move v0, zero 118 END(_setjmp) 119 120 LEAF(_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, _OFFSETOF_SC_REGS(a0) # get magic number 127 REG_L ra, _OFFSETOF_SC_PC(a0) 128 REG_LI t0, 0xACEDBADE 129 bne v0, t0, botch # jump if error 130 PTR_ADDU sp, sp, CALLFRAME_SIZ # does not matter, sanity 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 # get fpu status 143 INT_L v0, _OFFSETOF_SC_FPREGS_FCSR(a0) 144 REG_L sp, _OFFSETOF_SC_REGS_SP(a0) 145 REG_L s8, _OFFSETOF_SC_REGS_S8(a0) 146 ctc1 v0, $31 147 /* 148 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 149 * In N64, FP registers F23 .. F31 are callee-saved. 150 * In O32, FP registers F20 .. F23 are callee-saved. 151 */ 152 #ifndef SOFTFLOAT_FOR_GCC 153 #if defined(__mips_n64) || defined(__mips_n32) 154 FP_L $f30, _OFFSETOF_SC_FPREGS_F30(a0) 155 FP_L $f28, _OFFSETOF_SC_FPREGS_F28(a0) 156 FP_L $f26, _OFFSETOF_SC_FPREGS_F26(a0) 157 FP_L $f24, _OFFSETOF_SC_FPREGS_F24(a0) 158 #endif 159 #if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) 160 FP_L $f22, _OFFSETOF_SC_FPREGS_F22(a0) 161 FP_L $f20, _OFFSETOF_SC_FPREGS_F20(a0) 162 #endif 163 #if defined(__mips_o32) || defined(__mips_o64) 164 FP_L $f21, _OFFSETOF_SC_FPREGS_F21(a0) 165 FP_L $f23, _OFFSETOF_SC_FPREGS_F23(a0) 166 #endif 167 #if defined(__mips_n64) 168 FP_L $f25, _OFFSETOF_SC_FPREGS_F25(a0) 169 FP_L $f27, _OFFSETOF_SC_FPREGS_F27(a0) 170 FP_L $f29, _OFFSETOF_SC_FPREGS_F29(a0) 171 FP_L $f31, _OFFSETOF_SC_FPREGS_F31(a0) 172 #endif 173 #endif /* SOFTFLOAT_FOR_GCC */ 174 175 REG_EPILOGUE 176 REG_L v0, _OFFSETOF_SC_REGS_V0(a0) 177 j ra 178 nop 179 180 botch: 181 /* 182 * We know we aren't returning so we don't care about restoring 183 * our caller's GP. 184 */ 185 jal _C_LABEL(longjmperror) 186 187 PIC_TAILCALL(abort) 188 END(_longjmp) 189
Indexes created Wed Oct 22 00:09:40 GMT 2025