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/* $NetBSD: longjmp.c,v 1.1 2005/09/17 11:49:39 tsutsui Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christian Limpach and Matt Thomas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <sys/types.h>
#include <ucontext.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <machine/regnum.h>
void
__longjmp14(jmp_buf env, int val)
{
struct sigcontext *sc = (void *)env;
ucontext_t uc;
/* Ensure non-zero SP and sigcontext magic number is present */
if (sc->sc_regs[_R_SP] == 0 || sc->sc_regs[_R_ZERO] != 0xACEDBADE)
goto err;
/* Ensure non-zero return value */
if (val == 0)
val = 1;
/*
* Set _UC_{SET,CLR}STACK according to SS_ONSTACK.
*
* Restore the signal mask with sigprocmask() instead of _UC_SIGMASK,
* since libpthread may want to interpose on signal handling.
*/
uc.uc_flags = _UC_CPU | (sc->sc_onstack ? _UC_SETSTACK : _UC_CLRSTACK);
sigprocmask(SIG_SETMASK, &sc->sc_mask, NULL);
/* Clear uc_link */
uc.uc_link = 0;
/* Save return value in context */
uc.uc_mcontext.__gregs[_R_V0] = val;
/* Copy saved registers */
uc.uc_mcontext.__gregs[_REG_S0] = sc->sc_regs[_R_S0];
uc.uc_mcontext.__gregs[_REG_S1] = sc->sc_regs[_R_S1];
uc.uc_mcontext.__gregs[_REG_S2] = sc->sc_regs[_R_S2];
uc.uc_mcontext.__gregs[_REG_S3] = sc->sc_regs[_R_S3];
uc.uc_mcontext.__gregs[_REG_S4] = sc->sc_regs[_R_S4];
uc.uc_mcontext.__gregs[_REG_S5] = sc->sc_regs[_R_S5];
uc.uc_mcontext.__gregs[_REG_S6] = sc->sc_regs[_R_S6];
uc.uc_mcontext.__gregs[_REG_S7] = sc->sc_regs[_R_S7];
uc.uc_mcontext.__gregs[_REG_S8] = sc->sc_regs[_R_S8];
uc.uc_mcontext.__gregs[_REG_SP] = sc->sc_regs[_R_SP];
uc.uc_mcontext.__gregs[_REG_RA] = sc->sc_regs[_R_RA];
uc.uc_mcontext.__gregs[_REG_EPC] = sc->sc_pc;
/* Copy FP state */
if (sc->sc_fpused) {
/* FP saved regs are $f20 .. $f31 */
memcpy(&uc.uc_mcontext.__fpregs.__fp_r.__fp_regs[20],
&sc->sc_fpregs[20], 32 - 20);
uc.uc_mcontext.__fpregs.__fp_csr =
sc->sc_fpregs[_R_FSR - _FPBASE];
/* XXX sc_fp_control */
uc.uc_flags |= _UC_FPU;
}
setcontext(&uc);
err:
longjmperror();
abort();
/* NOTREACHED */
}
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