_setjmp.S revision 1.10
1 /* $NetBSD: _setjmp.S,v 1.10 1999/01/15 03:53:33 castor 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 44 #if defined(LIBC_SCCS) && !defined(lint) 45 ASMSTR("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93") 46 ASMSTR("$NetBSD: _setjmp.S,v 1.10 1999/01/15 03:53:33 castor Exp $") 47 #endif /* LIBC_SCCS and not lint */ 48 49 #ifdef ABICALLS 50 .abicalls 51 #endif 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 #ifdef ABICALLS 68 #.set noreorder 69 .cpload t9 70 #.set reorder 71 #endif 72 73 REG_PROLOGUE 74 REG_LI v0, 0xACEDBADE # sigcontext magic number 75 REG_S ra, (2 * 4)(a0) # sc_pc = return address 76 REG_S v0, (_OFFSETOF_SC_REGS)(a0) # saved in sc_regs[0] 77 REG_S s0, (S0 * SZREG + _OFFSETOF_SC_REGS)(a0) 78 REG_S s1, (S1 * SZREG + _OFFSETOF_SC_REGS)(a0) 79 REG_S s2, (S2 * SZREG + _OFFSETOF_SC_REGS)(a0) 80 REG_S s3, (S3 * SZREG + _OFFSETOF_SC_REGS)(a0) 81 REG_S s4, (S4 * SZREG + _OFFSETOF_SC_REGS)(a0) 82 REG_S s5, (S5 * SZREG + _OFFSETOF_SC_REGS)(a0) 83 REG_S s6, (S6 * SZREG + _OFFSETOF_SC_REGS)(a0) 84 REG_S s7, (S7 * SZREG + _OFFSETOF_SC_REGS)(a0) 85 REG_S sp, (SP * SZREG + _OFFSETOF_SC_REGS)(a0) 86 REG_S s8, (S8 * SZREG + _OFFSETOF_SC_REGS)(a0) 87 cfc1 v0, $31 # too bad cant check if FP used 88 swc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) 89 swc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) 90 swc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) 91 swc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) 92 swc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) 93 swc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) 94 swc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) 95 swc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) 96 swc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) 97 swc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) 98 swc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) 99 swc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) 100 sw v0, (32 * 4 + _OFFSETOF_SC_FPREGS)(a0) 101 REG_EPILOGUE 102 j ra 103 move v0, zero 104 END(_setjmp) 105 106 LEAF(_longjmp) 107 #ifdef ABICALLS 108 .set noreorder 109 .cpload t9 110 .set reorder 111 subu sp, sp, 32 112 .cprestore 16 113 .set noreorder 114 #endif 115 REG_PROLOGUE 116 REG_L v0, (_OFFSETOF_SC_REGS)(a0) # get magic number 117 REG_L ra, (2 * 4)(a0) 118 REG_LI t0, 0xACEDBADE 119 bne v0, t0, botch # jump if error 120 addu sp, sp, 32 # does not matter, sanity 121 REG_L s0, (S0 * SZREG + _OFFSETOF_SC_REGS)(a0) 122 REG_L s1, (S1 * SZREG + _OFFSETOF_SC_REGS)(a0) 123 REG_L s2, (S2 * SZREG + _OFFSETOF_SC_REGS)(a0) 124 REG_L s3, (S3 * SZREG + _OFFSETOF_SC_REGS)(a0) 125 REG_L s4, (S4 * SZREG + _OFFSETOF_SC_REGS)(a0) 126 REG_L s5, (S5 * SZREG + _OFFSETOF_SC_REGS)(a0) 127 REG_L s6, (S6 * SZREG + _OFFSETOF_SC_REGS)(a0) 128 REG_L s7, (S7 * SZREG + _OFFSETOF_SC_REGS)(a0) 129 lw v0, (32 * 4 + _OFFSETOF_SC_FPREGS)(a0) # get fpu status 130 REG_L sp, (SP * SZREG + _OFFSETOF_SC_REGS)(a0) 131 REG_L s8, (S8 * SZREG + _OFFSETOF_SC_REGS)(a0) 132 ctc1 v0, $31 133 lwc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) 134 lwc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) 135 lwc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) 136 lwc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) 137 lwc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) 138 lwc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) 139 lwc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) 140 lwc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) 141 lwc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) 142 lwc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) 143 lwc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) 144 lwc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) 145 146 j ra 147 move v0, a1 148 REG_EPILOGUE 149 botch: 150 jal _C_LABEL(longjmperror) 151 nop 152 jal _C_LABEL(abort) 153 nop 154 END(_longjmp) 155
Indexes created Thu Oct 23 22:10:10 GMT 2025