_setjmp.S revision 1.17
1 /* $NetBSD: _setjmp.S,v 1.17 2003/08/07 16:42:15 agc 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/cdefs.h> 36 #include <mips/regnum.h> 37 #include <mips/asm.h> 38 #include <machine/setjmp.h> 39 #include <machine/signal.h> /* XXX */ 40 41 #if defined(LIBC_SCCS) && !defined(lint) 42 ASMSTR("from: @(#)_setjmp.s 8.1 (Berkeley) 6/4/93") 43 ASMSTR("$NetBSD: _setjmp.S,v 1.17 2003/08/07 16:42:15 agc Exp $") 44 #endif /* LIBC_SCCS and not lint */ 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 * The previous signal state is NOT restored. 59 */ 60 61 .set noreorder 62 63 LEAF(_setjmp) 64 #ifdef __ABICALLS__ 65 #.set noreorder 66 .cpload t9 67 #.set reorder 68 #endif 69 70 REG_PROLOGUE 71 REG_LI v0, 0xACEDBADE # sigcontext magic number 72 REG_S ra, (2 * 4)(a0) # sc_pc = return address 73 REG_S v0, (_OFFSETOF_SC_REGS)(a0) # saved in sc_regs[0] 74 REG_S s0, (S0 * SZREG + _OFFSETOF_SC_REGS)(a0) 75 REG_S s1, (S1 * SZREG + _OFFSETOF_SC_REGS)(a0) 76 REG_S s2, (S2 * SZREG + _OFFSETOF_SC_REGS)(a0) 77 REG_S s3, (S3 * SZREG + _OFFSETOF_SC_REGS)(a0) 78 REG_S s4, (S4 * SZREG + _OFFSETOF_SC_REGS)(a0) 79 REG_S s5, (S5 * SZREG + _OFFSETOF_SC_REGS)(a0) 80 REG_S s6, (S6 * SZREG + _OFFSETOF_SC_REGS)(a0) 81 REG_S s7, (S7 * SZREG + _OFFSETOF_SC_REGS)(a0) 82 REG_S sp, (SP * SZREG + _OFFSETOF_SC_REGS)(a0) 83 REG_S s8, (S8 * SZREG + _OFFSETOF_SC_REGS)(a0) 84 cfc1 v0, $31 # too bad cant check if FP used 85 swc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) 86 swc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) 87 swc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) 88 swc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) 89 swc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) 90 swc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) 91 swc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) 92 swc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) 93 swc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) 94 swc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) 95 swc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) 96 swc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) 97 sw v0, (32 * 4 + _OFFSETOF_SC_FPREGS)(a0) 98 REG_EPILOGUE 99 j ra 100 move v0, zero 101 END(_setjmp) 102 103 LEAF(_longjmp) 104 #ifdef __ABICALLS__ 105 .set noreorder 106 .cpload t9 107 .set reorder 108 subu sp, sp, 32 109 .cprestore 16 110 .set noreorder 111 #endif 112 REG_PROLOGUE 113 REG_L v0, (_OFFSETOF_SC_REGS)(a0) # get magic number 114 REG_L ra, (2 * 4)(a0) 115 REG_LI t0, 0xACEDBADE 116 bne v0, t0, botch # jump if error 117 addu sp, sp, 32 # does not matter, sanity 118 REG_L s0, (S0 * SZREG + _OFFSETOF_SC_REGS)(a0) 119 REG_L s1, (S1 * SZREG + _OFFSETOF_SC_REGS)(a0) 120 REG_L s2, (S2 * SZREG + _OFFSETOF_SC_REGS)(a0) 121 REG_L s3, (S3 * SZREG + _OFFSETOF_SC_REGS)(a0) 122 REG_L s4, (S4 * SZREG + _OFFSETOF_SC_REGS)(a0) 123 REG_L s5, (S5 * SZREG + _OFFSETOF_SC_REGS)(a0) 124 REG_L s6, (S6 * SZREG + _OFFSETOF_SC_REGS)(a0) 125 REG_L s7, (S7 * SZREG + _OFFSETOF_SC_REGS)(a0) 126 lw v0, (32 * 4 + _OFFSETOF_SC_FPREGS)(a0) # get fpu status 127 REG_L sp, (SP * SZREG + _OFFSETOF_SC_REGS)(a0) 128 REG_L s8, (S8 * SZREG + _OFFSETOF_SC_REGS)(a0) 129 ctc1 v0, $31 130 lwc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) 131 lwc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) 132 lwc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) 133 lwc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) 134 lwc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) 135 lwc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) 136 lwc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) 137 lwc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) 138 lwc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) 139 lwc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) 140 lwc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) 141 lwc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) 142 143 j ra 144 move v0, a1 145 REG_EPILOGUE 146 botch: 147 jal _C_LABEL(longjmperror) 148 nop 149 jal _C_LABEL(abort) 150 nop 151 END(_longjmp) 152
Indexes created Mon Oct 27 04:09:48 GMT 2025