_setjmp.S revision 1.8
1 /* $NetBSD: _setjmp.S,v 1.8 1997/07/07 00:13:56 jonathan 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 <mips/regnum.h> 40 #include <mips/asm.h> 41 42 #if defined(LIBC_SCCS) && !defined(lint) 43 ASMSTR("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93") 44 ASMSTR("$NetBSD: _setjmp.S,v 1.8 1997/07/07 00:13:56 jonathan Exp $") 45 #endif /* LIBC_SCCS and not lint */ 46 47 #ifdef ABICALLS 48 .abicalls 49 #endif 50 51 /* 52 * C library -- _setjmp, _longjmp 53 * 54 * _longjmp(a,v) 55 * will generate a "return(v)" from 56 * the last call to 57 * _setjmp(a) 58 * by restoring registers from the stack, 59 * The previous signal state is NOT restored. 60 */ 61 62 .set noreorder 63 64 LEAF(_setjmp) 65 #ifdef ABICALLS 66 #.set noreorder 67 .cpload t9 68 #.set reorder 69 #endif 70 71 li v0, 0xACEDBADE # sigcontext magic number 72 sw ra, (2 * 4)(a0) # sc_pc = return address 73 sw v0, (3 * 4)(a0) # saved in sc_regs[0] 74 sw s0, ((S0 + 3) * 4)(a0) 75 sw s1, ((S1 + 3) * 4)(a0) 76 sw s2, ((S2 + 3) * 4)(a0) 77 sw s3, ((S3 + 3) * 4)(a0) 78 sw s4, ((S4 + 3) * 4)(a0) 79 sw s5, ((S5 + 3) * 4)(a0) 80 sw s6, ((S6 + 3) * 4)(a0) 81 sw s7, ((S7 + 3) * 4)(a0) 82 sw sp, ((SP + 3) * 4)(a0) 83 sw s8, ((S8 + 3) * 4)(a0) 84 cfc1 v0, $31 # too bad cant check if FP used 85 swc1 $f20, ((20 + 38) * 4)(a0) 86 swc1 $f21, ((21 + 38) * 4)(a0) 87 swc1 $f22, ((22 + 38) * 4)(a0) 88 swc1 $f23, ((23 + 38) * 4)(a0) 89 swc1 $f24, ((24 + 38) * 4)(a0) 90 swc1 $f25, ((25 + 38) * 4)(a0) 91 swc1 $f26, ((26 + 38) * 4)(a0) 92 swc1 $f27, ((27 + 38) * 4)(a0) 93 swc1 $f28, ((28 + 38) * 4)(a0) 94 swc1 $f29, ((29 + 38) * 4)(a0) 95 swc1 $f30, ((30 + 38) * 4)(a0) 96 swc1 $f31, ((31 + 38) * 4)(a0) 97 sw v0, ((32 + 38) * 4)(a0) 98 j ra 99 move v0, zero 100 END(_setjmp) 101 102 LEAF(_longjmp) 103 #ifdef ABICALLS 104 .set noreorder 105 .cpload t9 106 .set reorder 107 subu sp, sp, 32 108 .cprestore 16 109 .set noreorder 110 #endif 111 lw v0, (3 * 4)(a0) # get magic number 112 lw ra, (2 * 4)(a0) 113 bne v0, 0xACEDBADE, botch # jump if error 114 115 addu sp, sp, 32 # don't matter, sanity 116 lw s0, ((S0 + 3) * 4)(a0) 117 lw s1, ((S1 + 3) * 4)(a0) 118 lw s2, ((S2 + 3) * 4)(a0) 119 lw s3, ((S3 + 3) * 4)(a0) 120 lw s4, ((S4 + 3) * 4)(a0) 121 lw s5, ((S5 + 3) * 4)(a0) 122 lw s6, ((S6 + 3) * 4)(a0) 123 lw s7, ((S7 + 3) * 4)(a0) 124 lw v0, ((32 + 38) * 4)(a0) # get fpu status 125 lw sp, ((SP + 3) * 4)(a0) 126 lw s8, ((S8 + 3) * 4)(a0) 127 ctc1 v0, $31 128 lwc1 $f20, ((20 + 38) * 4)(a0) 129 lwc1 $f21, ((21 + 38) * 4)(a0) 130 lwc1 $f22, ((22 + 38) * 4)(a0) 131 lwc1 $f23, ((23 + 38) * 4)(a0) 132 lwc1 $f24, ((24 + 38) * 4)(a0) 133 lwc1 $f25, ((25 + 38) * 4)(a0) 134 lwc1 $f26, ((26 + 38) * 4)(a0) 135 lwc1 $f27, ((27 + 38) * 4)(a0) 136 lwc1 $f28, ((28 + 38) * 4)(a0) 137 lwc1 $f29, ((29 + 38) * 4)(a0) 138 lwc1 $f30, ((30 + 38) * 4)(a0) 139 lwc1 $f31, ((31 + 38) * 4)(a0) 140 141 j ra 142 move v0, a1 143 botch: 144 jal _C_LABEL(longjmperror) 145 nop 146 jal _C_LABEL(abort) 147 nop 148 END(_longjmp) 149
Indexes created Thu Oct 23 22:10:10 GMT 2025