97 lines
2.9 KiB
C
97 lines
2.9 KiB
C
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/* $NetBSD: longjmp.c,v 1.2 2008/04/28 20:22:56 martin Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christian Limpach.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "namespace.h"
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#include <sys/types.h>
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#include <ucontext.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#define __LIBC12_SOURCE__
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#include <setjmp.h>
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#include <compat/include/setjmp.h>
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typedef struct {
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__greg_t __data[6];
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__greg_t __addr[4];
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} __jmp_buf_regs_t;
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void
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__longjmp14(jmp_buf env, int val)
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{
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struct sigcontext *sc = (void *)env;
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__jmp_buf_regs_t *r = (void *)&sc[1];
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ucontext_t uc;
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/* Ensure non-zero SP */
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if (sc->sc_sp == 0)
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goto err;
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/* Make return value non-zero */
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if (val == 0)
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val = 1;
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/* Save return value in context */
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uc.uc_mcontext.__gregs[_REG_D0] = val;
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/*
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* Set _UC_SIGMASK, _UC_CPU and _UC_M68K_UC_USER
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* Set _UC_{SET,CLR}STACK according to SS_ONSTACK
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*/
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uc.uc_flags = _UC_SIGMASK | _UC_CPU | _UC_M68K_UC_USER |
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(sc->sc_onstack ? _UC_SETSTACK : _UC_CLRSTACK);
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/* Clear uc_link */
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uc.uc_link = 0;
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/* Copy signal mask */
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uc.uc_sigmask = sc->sc_mask;
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/* Copy SP/PC/PS/FP */
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uc.uc_mcontext.__gregs[_REG_A7] = sc->sc_sp;
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uc.uc_mcontext.__gregs[_REG_PC] = sc->sc_pc;
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uc.uc_mcontext.__gregs[_REG_PS] = sc->sc_ps;
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uc.uc_mcontext.__gregs[_REG_A6] = sc->sc_fp;
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/* Copy remaining non-scratch regs. */
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memcpy(&uc.uc_mcontext.__gregs[_REG_D2],
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&r->__data, sizeof(r->__data));
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memcpy(&uc.uc_mcontext.__gregs[_REG_A2],
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&r->__addr, sizeof(r->__addr));
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setcontext(&uc);
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err:
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longjmperror();
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abort();
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/* NOTREACHED */
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}
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