1/* $NetBSD: _setjmp.S,v 1.16 2002/11/10 18:10:25 thorpej 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39#include <machine/cdefs.h> 40#include <mips/regnum.h> 41#include <mips/asm.h> 42#include <machine/setjmp.h> 43#include <machine/signal.h> /* XXX */ 44 45#if defined(LIBC_SCCS) && !defined(lint) 46 ASMSTR("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93") 47 ASMSTR("$NetBSD: _setjmp.S,v 1.16 2002/11/10 18:10:25 thorpej Exp $") 48#endif /* LIBC_SCCS and not lint */ 49 50#ifdef __ABICALLS__ 51 .abicalls 52#endif 53 54/* 55 * C library -- _setjmp, _longjmp 56 * 57 * _longjmp(a,v) 58 * will generate a "return(v)" from 59 * the last call to 60 * _setjmp(a) 61 * by restoring registers from the stack, 62 * The previous signal state is NOT restored. 63 */ 64 65 .set noreorder 66 67LEAF(_setjmp) 68#ifdef __ABICALLS__ 69 #.set noreorder 70 .cpload t9 71 #.set reorder 72#endif 73 74 REG_PROLOGUE 75 REG_LI v0, 0xACEDBADE # sigcontext magic number 76 REG_S ra, (2 * 4)(a0) # sc_pc = return address 77 REG_S v0, (_OFFSETOF_SC_REGS)(a0) # saved in sc_regs[0] 78 REG_S s0, (S0 * SZREG + _OFFSETOF_SC_REGS)(a0) 79 REG_S s1, (S1 * SZREG + _OFFSETOF_SC_REGS)(a0) 80 REG_S s2, (S2 * SZREG + _OFFSETOF_SC_REGS)(a0) 81 REG_S s3, (S3 * SZREG + _OFFSETOF_SC_REGS)(a0) 82 REG_S s4, (S4 * SZREG + _OFFSETOF_SC_REGS)(a0) 83 REG_S s5, (S5 * SZREG + _OFFSETOF_SC_REGS)(a0) 84 REG_S s6, (S6 * SZREG + _OFFSETOF_SC_REGS)(a0) 85 REG_S s7, (S7 * SZREG + _OFFSETOF_SC_REGS)(a0) 86 REG_S sp, (SP * SZREG + _OFFSETOF_SC_REGS)(a0) 87 REG_S s8, (S8 * SZREG + _OFFSETOF_SC_REGS)(a0) 88 cfc1 v0, $31 # too bad cant check if FP used 89 swc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) 90 swc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) 91 swc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) 92 swc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) 93 swc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) 94 swc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) 95 swc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) 96 swc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) 97 swc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) 98 swc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) 99 swc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) 100 swc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) 101 sw v0, (32 * 4 + _OFFSETOF_SC_FPREGS)(a0) 102 REG_EPILOGUE 103 j ra 104 move v0, zero 105END(_setjmp) 106 107LEAF(_longjmp) 108#ifdef __ABICALLS__ 109 .set noreorder 110 .cpload t9 111 .set reorder 112 subu sp, sp, 32 113 .cprestore 16 114 .set noreorder 115#endif 116 REG_PROLOGUE 117 REG_L v0, (_OFFSETOF_SC_REGS)(a0) # get magic number 118 REG_L ra, (2 * 4)(a0) 119 REG_LI t0, 0xACEDBADE 120 bne v0, t0, botch # jump if error 121 addu sp, sp, 32 # does not matter, sanity 122 REG_L s0, (S0 * SZREG + _OFFSETOF_SC_REGS)(a0) 123 REG_L s1, (S1 * SZREG + _OFFSETOF_SC_REGS)(a0) 124 REG_L s2, (S2 * SZREG + _OFFSETOF_SC_REGS)(a0) 125 REG_L s3, (S3 * SZREG + _OFFSETOF_SC_REGS)(a0) 126 REG_L s4, (S4 * SZREG + _OFFSETOF_SC_REGS)(a0) 127 REG_L s5, (S5 * SZREG + _OFFSETOF_SC_REGS)(a0) 128 REG_L s6, (S6 * SZREG + _OFFSETOF_SC_REGS)(a0) 129 REG_L s7, (S7 * SZREG + _OFFSETOF_SC_REGS)(a0) 130 lw v0, (32 * 4 + _OFFSETOF_SC_FPREGS)(a0) # get fpu status 131 REG_L sp, (SP * SZREG + _OFFSETOF_SC_REGS)(a0) 132 REG_L s8, (S8 * SZREG + _OFFSETOF_SC_REGS)(a0) 133 ctc1 v0, $31 134 lwc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) 135 lwc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) 136 lwc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) 137 lwc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) 138 lwc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) 139 lwc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) 140 lwc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) 141 lwc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) 142 lwc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) 143 lwc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) 144 lwc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) 145 lwc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) 146 147 j ra 148 move v0, a1 149 REG_EPILOGUE 150botch: 151 jal _C_LABEL(longjmperror) 152 nop 153 jal _C_LABEL(abort) 154 nop 155END(_longjmp) 156