setjmp.S revision 277537
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/10/lib/libc/mips/gen/setjmp.S 277537 2015-01-22 21:17:58Z brooks $"); 37#include <machine/regnum.h> 38 39#if defined(LIBC_SCCS) && !defined(lint) 40 ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93") 41 ASMSTR("$NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $") 42#endif /* LIBC_SCCS and not lint */ 43 44#include "SYS.h" 45 46#ifdef __ABICALLS__ 47 .abicalls 48#endif 49 50/* 51 * C library -- setjmp, longjmp 52 * 53 * longjmp(a,v) 54 * will generate a "return(v)" from 55 * the last call to 56 * setjmp(a) 57 * by restoring registers from the stack, 58 * and a struct sigcontext, see <signal.h> 59 */ 60 61#define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2)) 62 63 64NESTED(setjmp, SETJMP_FRAME_SIZE, ra) 65 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 66 SETUP_GP 67 PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame 68 SAVE_GP(CALLFRAME_GP) 69 SETUP_GP64(CALLFRAME_GP, setjmp) 70 71 REG_S ra, CALLFRAME_RA(sp) # save RA 72 REG_S a0, CALLFRAME_SIZ(sp) # store env 73 74 /* Get the signal mask. */ 75 PTR_ADDU a2, a0, _JB_SIGMASK * SZREG # &oenv 76 li a0, 1 # SIG_SETBLOCK 77 move a1, zero # &env == 0 78 PTR_LA t9, _C_LABEL(sigprocmask) # get current signal mask 79 jalr t9 80 81 RESTORE_GP64 82 REG_L a0, CALLFRAME_SIZ(sp) # restore env pointer 83 REG_L ra, CALLFRAME_RA(sp) # restore RA 84 PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame 85 86 REG_LI v0, _JB_MAGIC_SETJMP 87 REG_S v0, (_JB_MAGIC * SZREG)(a0) 88 REG_S ra, (_JB_REG_RA * SZREG)(a0) 89 /* 90 * From "MIPSpro N32 ABI Handbook", Table 2-1: 91 * Registers s0..s7 are callee-saved. 92 * The sp register is callee-saved. 93 * The fp (or s8) register is callee-saved. 94 * The gp register is callee-saved (for n32/n64). 95 */ 96 REG_S s0, (_JB_REG_S0 * SZREG)(a0) 97 REG_S s1, (_JB_REG_S1 * SZREG)(a0) 98 REG_S s2, (_JB_REG_S2 * SZREG)(a0) 99 REG_S s3, (_JB_REG_S3 * SZREG)(a0) 100 REG_S s4, (_JB_REG_S4 * SZREG)(a0) 101 REG_S s5, (_JB_REG_S5 * SZREG)(a0) 102 REG_S s6, (_JB_REG_S6 * SZREG)(a0) 103 REG_S s7, (_JB_REG_S7 * SZREG)(a0) 104 REG_S sp, (_JB_REG_SP * SZREG)(a0) 105 REG_S s8, (_JB_REG_S8 * SZREG)(a0) 106#if defined(__mips_n32) || defined(__mips_n64) 107 REG_S gp, (_JB_REG_GP * SZREG)(a0) 108#endif 109#ifndef SOFTFLOAT 110 /* 111 * From "MIPSpro N32 ABI Handbook", Table 2-1: 112 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 113 * In N64, FP registers F24 .. F31 are callee-saved. 114 * In O32, FP registers F20 .. F23 are callee-saved. 115 */ 116 cfc1 v0, $31 117 INT_S v0, (_JB_FPREG_FCSR * SZREG)(a0) 118#if defined(__mips_o32) || defined(__mips_o64) || defined(__mips_n32) 119 FP_S $f20, (_JB_FPREG_F20 * SZREG)(a0) 120 FP_S $f22, (_JB_FPREG_F22 * SZREG)(a0) 121#endif 122#if defined(__mips_o32) || defined(__mips_o64) 123 FP_S $f21, (_JB_FPREG_F21 * SZREG)(a0) 124 FP_S $f23, (_JB_FPREG_F23 * SZREG)(a0) 125#endif 126#if defined(__mips_n32) || defined(__mips_n64) 127 FP_S $f24, (_JB_FPREG_F24 * SZREG)(a0) 128 FP_S $f26, (_JB_FPREG_F26 * SZREG)(a0) 129 FP_S $f28, (_JB_FPREG_F28 * SZREG)(a0) 130 FP_S $f30, (_JB_FPREG_F30 * SZREG)(a0) 131#endif 132#if defined(__mips_n64) 133 FP_S $f25, (_JB_FPREG_F25 * SZREG)(a0) 134 FP_S $f27, (_JB_FPREG_F27 * SZREG)(a0) 135 FP_S $f29, (_JB_FPREG_F29 * SZREG)(a0) 136 FP_S $f31, (_JB_FPREG_F31 * SZREG)(a0) 137#endif 138#endif /* ! SOFTFLOAT */ 139 140 move v0, zero 141 jr ra 142END(setjmp) 143 144#define LONGJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2)) 145 146NESTED(longjmp, LONGJMP_FRAME_SIZE, ra) 147 .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 148 PIC_PROLOGUE(longjmp) 149 PTR_SUBU sp, sp, LONGJMP_FRAME_SIZE # allocate stack frame 150 SAVE_GP(CALLFRAME_GP) 151 152 REG_S ra, CALLFRAME_RA(sp) # save RA 153 REG_L v0, (_JB_MAGIC * SZREG)(a0) 154 REG_LI t0, _JB_MAGIC_SETJMP 155 bne v0, t0, botch # jump if error 156 nop 157 158 REG_S a0, CALLFRAME_SIZ(sp) # save env 159 REG_S a1, (CALLFRAME_SIZ + SZREG)(sp) # save return value 160 161 # set sigmask 162 PTR_ADDU a1, a0, _JB_SIGMASK * SZREG # &set 163 move a2, zero # &oset == NULL 164 li a0, 3 # SIG_SETMASK 165 PTR_LA t9,_C_LABEL(sigprocmask) # set current signal mask 166 jal t9 167 nop 168 169 REG_L a0, CALLFRAME_SIZ(sp) # restore env 170 REG_L a1, (CALLFRAME_SIZ + SZREG)(sp) # restore return value 171 172 REG_L ra, (_JB_REG_RA * SZREG)(a0) 173 /* 174 * From "MIPSpro N32 ABI Handbook", Table 2-1: 175 * Registers s0..s7 are callee-saved. 176 * The sp register is callee-saved. 177 * The fp (or s8) register is callee-saved. 178 * The gp register is callee-saved (for n32/n64). 179 */ 180 REG_L s0, (_JB_REG_S0 * SZREG)(a0) 181 REG_L s1, (_JB_REG_S1 * SZREG)(a0) 182 REG_L s2, (_JB_REG_S2 * SZREG)(a0) 183 REG_L s3, (_JB_REG_S3 * SZREG)(a0) 184 REG_L s4, (_JB_REG_S4 * SZREG)(a0) 185 REG_L s5, (_JB_REG_S5 * SZREG)(a0) 186 REG_L s6, (_JB_REG_S6 * SZREG)(a0) 187 REG_L s7, (_JB_REG_S7 * SZREG)(a0) 188 REG_L sp, (_JB_REG_SP * SZREG)(a0) 189 REG_L s8, (_JB_REG_S8 * SZREG)(a0) 190#if defined(__mips_n32) || defined(__mips_n64) 191 REG_L gp, (_JB_REG_GP * SZREG)(a0) 192#endif 193#ifndef SOFTFLOAT 194 /* 195 * From "MIPSpro N32 ABI Handbook", Table 2-1: 196 * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 197 * In N64, FP registers F23 .. F31 are callee-saved. 198 * In O32, FP registers F20 .. F23 are callee-saved. 199 */ 200 INT_L v0, (_JB_FPREG_FCSR * SZREG)(a0) 201 ctc1 v0, $31 202#if defined(__mips_n64) || defined(__mips_n32) 203 FP_L $f30, (_JB_FPREG_F30 * SZREG)(a0) 204 FP_L $f28, (_JB_FPREG_F28 * SZREG)(a0) 205 FP_L $f26, (_JB_FPREG_F26 * SZREG)(a0) 206 FP_L $f24, (_JB_FPREG_F24 * SZREG)(a0) 207#endif 208#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) 209 FP_L $f22, (_JB_FPREG_F22 * SZREG)(a0) 210 FP_L $f20, (_JB_FPREG_F20 * SZREG)(a0) 211#endif 212#if defined(__mips_o32) || defined(__mips_o64) 213 FP_L $f21, (_JB_FPREG_F21 * SZREG)(a0) 214 FP_L $f23, (_JB_FPREG_F23 * SZREG)(a0) 215#endif 216#if defined(__mips_n64) 217 FP_L $f25, (_JB_FPREG_F25 * SZREG)(a0) 218 FP_L $f27, (_JB_FPREG_F27 * SZREG)(a0) 219 FP_L $f29, (_JB_FPREG_F29 * SZREG)(a0) 220 FP_L $f31, (_JB_FPREG_F31 * SZREG)(a0) 221#endif 222#endif /* ! SOFTFLOAT */ 223 224 move v0, a1 225 j ra 226 nop 227 228botch: 229 /* 230 * We know we aren't returning so we don't care about restoring 231 * our caller's GP. 232 */ 233 PTR_LA t9, _C_LABEL(longjmperror) 234 jalr t9 235 nop 236 237 PIC_TAILCALL(abort) 238END(longjmp) 239