setjmp.S revision 351792
1/* $NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 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/asm.h> 36__FBSDID("$FreeBSD: stable/11/lib/libc/mips/gen/setjmp.S 351792 2019-09-03 20:19:43Z kevans $"); 37 38#if defined(LIBC_SCCS) && !defined(lint) 39 ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93") 40 ASMSTR("$NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $") 41#endif /* LIBC_SCCS and not lint */ 42 43#include "SYS.h" 44 45#ifdef __ABICALLS__ 46 .abicalls 47#endif 48 49/* 50 * C library -- setjmp, longjmp 51 * 52 * longjmp(a,v) 53 * will generate a "return(v)" from 54 * the last call to 55 * setjmp(a) 56 * by restoring registers from the stack, 57 * and a struct sigcontext, see <signal.h> 58 */ 59 60#define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2)) 61 62 63NESTED(setjmp, SETJMP_FRAME_SIZE, ra) 64 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 65 SETUP_GP 66 PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame 67 SAVE_GP(CALLFRAME_GP) 68 SETUP_GP64(CALLFRAME_GP, setjmp) 69 70 REG_S ra, CALLFRAME_RA(sp) # save RA 71 REG_S a0, CALLFRAME_SIZ(sp) # store env 72 73 /* Get the signal mask. */ 74 PTR_ADDU a2, a0, _JB_SIGMASK * SZREG # &oenv 75 li a0, 1 # SIG_SETBLOCK 76 move a1, zero # &env == 0 77 PTR_LA t9, _C_LABEL(sigprocmask) # get current signal mask 78 jalr t9 79 80 RESTORE_GP64 81 REG_L a0, CALLFRAME_SIZ(sp) # restore env pointer 82 REG_L ra, CALLFRAME_RA(sp) # restore RA 83 PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame 84 85 REG_LI v0, _JB_MAGIC_SETJMP 86 REG_S v0, (_JB_MAGIC * SZREG)(a0) 87 REG_S ra, (_JB_REG_RA * SZREG)(a0) 88 /* 89 * From "MIPSpro N32 ABI Handbook", Table 2-1: 90 * Registers s0..s7 are callee-saved. 91 * The sp register is callee-saved. 92 * The fp (or s8) register is callee-saved. 93 * The gp register is callee-saved (for n32/n64). 94 */ 95 REG_S s0, (_JB_REG_S0 * SZREG)(a0) 96 REG_S s1, (_JB_REG_S1 * SZREG)(a0) 97 REG_S s2, (_JB_REG_S2 * SZREG)(a0) 98 REG_S s3, (_JB_REG_S3 * SZREG)(a0) 99 REG_S s4, (_JB_REG_S4 * SZREG)(a0) 100 REG_S s5, (_JB_REG_S5 * SZREG)(a0) 101 REG_S s6, (_JB_REG_S6 * SZREG)(a0) 102 REG_S s7, (_JB_REG_S7 * SZREG)(a0) 103 REG_S sp, (_JB_REG_SP * SZREG)(a0) 104 REG_S s8, (_JB_REG_S8 * SZREG)(a0) 105#if defined(__mips_n32) || defined(__mips_n64) 106 REG_S gp, (_JB_REG_GP * SZREG)(a0) 107#endif 108#ifndef SOFTFLOAT 109 /* 110 * From "MIPSpro N32 ABI Handbook", Table 2-1: 111 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 112 * In N64, FP registers F24 .. F31 are callee-saved. 113 * In O32, FP registers F20 .. F23 are callee-saved. 114 */ 115 cfc1 v0, $31 116 INT_S v0, (_JB_FPREG_FCSR * SZREG)(a0) 117#if defined(__mips_o32) || defined(__mips_o64) || defined(__mips_n32) 118 FP_S $f20, (_JB_FPREG_F20 * SZREG)(a0) 119 FP_S $f22, (_JB_FPREG_F22 * SZREG)(a0) 120#endif 121#if defined(__mips_o32) || defined(__mips_o64) 122 FP_S $f21, (_JB_FPREG_F21 * SZREG)(a0) 123 FP_S $f23, (_JB_FPREG_F23 * SZREG)(a0) 124#endif 125#if defined(__mips_n32) || defined(__mips_n64) 126 FP_S $f24, (_JB_FPREG_F24 * SZREG)(a0) 127 FP_S $f26, (_JB_FPREG_F26 * SZREG)(a0) 128 FP_S $f28, (_JB_FPREG_F28 * SZREG)(a0) 129 FP_S $f30, (_JB_FPREG_F30 * SZREG)(a0) 130#endif 131#if defined(__mips_n64) 132 FP_S $f25, (_JB_FPREG_F25 * SZREG)(a0) 133 FP_S $f27, (_JB_FPREG_F27 * SZREG)(a0) 134 FP_S $f29, (_JB_FPREG_F29 * SZREG)(a0) 135 FP_S $f31, (_JB_FPREG_F31 * SZREG)(a0) 136#endif 137#endif /* ! SOFTFLOAT */ 138 139 move v0, zero 140 jr ra 141END(setjmp) 142 143#define LONGJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2)) 144 145NESTED(longjmp, LONGJMP_FRAME_SIZE, ra) 146 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 147 PIC_PROLOGUE(longjmp) 148 PTR_SUBU sp, sp, LONGJMP_FRAME_SIZE # allocate stack frame 149 SAVE_GP(CALLFRAME_GP) 150 151 REG_S ra, CALLFRAME_RA(sp) # save RA 152 REG_L v0, (_JB_MAGIC * SZREG)(a0) 153 REG_LI t0, _JB_MAGIC_SETJMP 154 bne v0, t0, botch # jump if error 155 nop 156 157 REG_S a0, CALLFRAME_SIZ(sp) # save env 158 REG_S a1, (CALLFRAME_SIZ + SZREG)(sp) # save return value 159 160 # set sigmask 161 PTR_ADDU a1, a0, _JB_SIGMASK * SZREG # &set 162 move a2, zero # &oset == NULL 163 li a0, 3 # SIG_SETMASK 164 PTR_LA t9,_C_LABEL(sigprocmask) # set current signal mask 165 jal t9 166 nop 167 168 REG_L a0, CALLFRAME_SIZ(sp) # restore env 169 REG_L a1, (CALLFRAME_SIZ + SZREG)(sp) # restore return value 170 171 REG_L ra, (_JB_REG_RA * SZREG)(a0) 172 /* 173 * From "MIPSpro N32 ABI Handbook", Table 2-1: 174 * Registers s0..s7 are callee-saved. 175 * The sp register is callee-saved. 176 * The fp (or s8) register is callee-saved. 177 * The gp register is callee-saved (for n32/n64). 178 */ 179 REG_L s0, (_JB_REG_S0 * SZREG)(a0) 180 REG_L s1, (_JB_REG_S1 * SZREG)(a0) 181 REG_L s2, (_JB_REG_S2 * SZREG)(a0) 182 REG_L s3, (_JB_REG_S3 * SZREG)(a0) 183 REG_L s4, (_JB_REG_S4 * SZREG)(a0) 184 REG_L s5, (_JB_REG_S5 * SZREG)(a0) 185 REG_L s6, (_JB_REG_S6 * SZREG)(a0) 186 REG_L s7, (_JB_REG_S7 * SZREG)(a0) 187 REG_L sp, (_JB_REG_SP * SZREG)(a0) 188 REG_L s8, (_JB_REG_S8 * SZREG)(a0) 189#if defined(__mips_n32) || defined(__mips_n64) 190 REG_L gp, (_JB_REG_GP * SZREG)(a0) 191#endif 192#ifndef SOFTFLOAT 193 /* 194 * From "MIPSpro N32 ABI Handbook", Table 2-1: 195 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 196 * In N64, FP registers F23 .. F31 are callee-saved. 197 * In O32, FP registers F20 .. F23 are callee-saved. 198 */ 199 INT_L v0, (_JB_FPREG_FCSR * SZREG)(a0) 200 ctc1 v0, $31 201#if defined(__mips_n64) || defined(__mips_n32) 202 FP_L $f30, (_JB_FPREG_F30 * SZREG)(a0) 203 FP_L $f28, (_JB_FPREG_F28 * SZREG)(a0) 204 FP_L $f26, (_JB_FPREG_F26 * SZREG)(a0) 205 FP_L $f24, (_JB_FPREG_F24 * SZREG)(a0) 206#endif 207#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) 208 FP_L $f22, (_JB_FPREG_F22 * SZREG)(a0) 209 FP_L $f20, (_JB_FPREG_F20 * SZREG)(a0) 210#endif 211#if defined(__mips_o32) || defined(__mips_o64) 212 FP_L $f21, (_JB_FPREG_F21 * SZREG)(a0) 213 FP_L $f23, (_JB_FPREG_F23 * SZREG)(a0) 214#endif 215#if defined(__mips_n64) 216 FP_L $f25, (_JB_FPREG_F25 * SZREG)(a0) 217 FP_L $f27, (_JB_FPREG_F27 * SZREG)(a0) 218 FP_L $f29, (_JB_FPREG_F29 * SZREG)(a0) 219 FP_L $f31, (_JB_FPREG_F31 * SZREG)(a0) 220#endif 221#endif /* ! SOFTFLOAT */ 222 223 move v0, a1 224 j ra 225 nop 226 227botch: 228 /* 229 * We know we aren't returning so we don't care about restoring 230 * our caller's GP. 231 */ 232 PTR_LA t9, _C_LABEL(longjmperror) 233 jalr t9 234 nop 235 236 PIC_TAILCALL(abort) 237END(longjmp) 238