1 /* $NetBSD: __longjmp14.c,v 1.4 2005/09/14 08:59:37 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christian Limpach and Matt Thomas. 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 NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include "namespace.h" 40 #include <sys/types.h> 41 #include <ucontext.h> 42 #include <signal.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <machine/reg.h> 46 #include <machine/alpha_cpu.h> 47 48 #define __LIBC12_SOURCE__ 49 #include <setjmp.h> 50 #include <compat/include/setjmp.h> 51 52 void 53 __longjmp14(jmp_buf env, int val) 54 { 55 struct sigcontext *sc = (void *)env; 56 ucontext_t uc; 57 58 /* Ensure non-zero SP */ 59 if (sc->sc_sp == 0 || sc->sc_regs[R_ZERO] != 0xacedbade) 60 goto err; 61 62 /* Ensure non-zero return value */ 63 if (val == 0) 64 val = -1; 65 66 /* Set _UC_SIGMASK and _UC_CPU */ 67 uc.uc_flags = _UC_SIGMASK | _UC_CPU; 68 69 /* Clear uc_link */ 70 uc.uc_link = 0; 71 72 /* Save return value in context */ 73 uc.uc_mcontext.__gregs[_REG_V0] = val; 74 75 /* Copy saved registers */ 76 uc.uc_mcontext.__gregs[_REG_S0] = sc->sc_regs[R_S0]; 77 uc.uc_mcontext.__gregs[_REG_S1] = sc->sc_regs[R_S1]; 78 uc.uc_mcontext.__gregs[_REG_S2] = sc->sc_regs[R_S2]; 79 uc.uc_mcontext.__gregs[_REG_S3] = sc->sc_regs[R_S3]; 80 uc.uc_mcontext.__gregs[_REG_S4] = sc->sc_regs[R_S4]; 81 uc.uc_mcontext.__gregs[_REG_S5] = sc->sc_regs[R_S5]; 82 uc.uc_mcontext.__gregs[_REG_S6] = sc->sc_regs[R_S6]; 83 uc.uc_mcontext.__gregs[_REG_RA] = sc->sc_regs[R_RA]; 84 uc.uc_mcontext.__gregs[_REG_SP] = sc->sc_sp; 85 uc.uc_mcontext.__gregs[_REG_PC] = sc->sc_pc; 86 uc.uc_mcontext.__gregs[_REG_PS] = 87 (sc->sc_ps | ALPHA_PSL_USERSET) & ~ALPHA_PSL_USERCLR; 88 89 /* Copy FP state */ 90 if (sc->sc_ownedfp) { 91 memcpy(&uc.uc_mcontext.__fpregs.__fp_fr, 92 &sc->sc_fpregs, 31 * sizeof(unsigned long)); 93 uc.uc_mcontext.__fpregs.__fp_fpcr = sc->sc_fpcr; 94 /* XXX sc_fp_control */ 95 uc.uc_flags |= _UC_FPU; 96 } 97 98 /* Copy signal mask */ 99 uc.uc_sigmask = sc->sc_mask; 100 101 setcontext(&uc); 102 err: 103 longjmperror(); 104 abort(); 105 /* NOTREACHED */ 106 } 107