1/* $NetBSD: longjmp.c,v 1.1 2006/03/09 16:20:27 christos 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. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "namespace.h" 33#include <sys/types.h> 34#include <ucontext.h> 35#include <signal.h> 36#include <stdlib.h> 37#include <string.h> 38 39#define __LIBC12_SOURCE__ 40#include <setjmp.h> 41#include <compat/include/setjmp.h> 42 43typedef struct { 44 __greg_t __data[6]; 45 __greg_t __addr[4]; 46} __jmp_buf_regs_t; 47 48void 49__longjmp14(jmp_buf env, int val) 50{ 51 struct sigcontext *sc = (void *)env; 52 __jmp_buf_regs_t *r = (void *)&sc[1]; 53 ucontext_t uc; 54 55 /* Ensure non-zero SP */ 56 if (sc->sc_sp == 0) 57 goto err; 58 59 /* Make return value non-zero */ 60 if (val == 0) 61 val = 1; 62 63 /* Save return value in context */ 64 uc.uc_mcontext.__gregs[_REG_D0] = val; 65 66 /* 67 * Set _UC_SIGMASK, _UC_CPU and _UC_M68K_UC_USER 68 * Set _UC_{SET,CLR}STACK according to SS_ONSTACK 69 */ 70 uc.uc_flags = _UC_SIGMASK | _UC_CPU | _UC_M68K_UC_USER | 71 (sc->sc_onstack ? _UC_SETSTACK : _UC_CLRSTACK); 72 73 /* Clear uc_link */ 74 uc.uc_link = 0; 75 76 /* Copy signal mask */ 77 uc.uc_sigmask = sc->sc_mask; 78 79 /* Copy SP/PC/PS/FP */ 80 uc.uc_mcontext.__gregs[_REG_A7] = sc->sc_sp; 81 uc.uc_mcontext.__gregs[_REG_PC] = sc->sc_pc; 82 uc.uc_mcontext.__gregs[_REG_PS] = sc->sc_ps; 83 uc.uc_mcontext.__gregs[_REG_A6] = sc->sc_fp; 84 85 /* Copy remaining non-scratch regs. */ 86 memcpy(&uc.uc_mcontext.__gregs[_REG_D2], 87 &r->__data, sizeof(r->__data)); 88 memcpy(&uc.uc_mcontext.__gregs[_REG_A2], 89 &r->__addr, sizeof(r->__addr)); 90 91 setcontext(&uc); 92 err: 93 longjmperror(); 94 abort(); 95 /* NOTREACHED */ 96} 97