minix/lib/libc/arch/sparc64/gen/longjmp.c

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/* $NetBSD: longjmp.c,v 1.2 2008/04/28 20:22:57 martin 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.
*
* 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 "namespace.h"
#include <sys/types.h>
#include <ucontext.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#define __LIBC12_SOURCE__
#include <setjmp.h>
#include <compat/include/setjmp.h>
typedef struct {
__greg_t __glob[5];
} __jmp_buf_regs_t;
void
__longjmp14(jmp_buf env, int val)
{
struct sigcontext *sc = (void *)env;
__jmp_buf_regs_t *r = (void *)&sc[1];
ucontext_t uc;
/* Ensure non-zero SP */
if (sc->sc_sp == 0)
goto err;
/*
* Set _UC_CPU. No FPU data saved, so we can't restore
* that. Set _UC_{SET,CLR}STACK according to SS_ONSTACK
*/
memset(&uc, 0, sizeof(uc));
uc.uc_flags = _UC_CPU | (sc->sc_onstack ? _UC_SETSTACK : _UC_CLRSTACK);
/*
* Set the signal mask - this is a weak symbol, so don't use
* _UC_SIGMASK in the mcontext, libpthread might override sigprocmask.
*/
sigprocmask(SIG_SETMASK, &sc->sc_mask, NULL);
/* Fill other registers */
uc.uc_mcontext.__gregs[_REG_CCR] = sc->sc_tstate;
uc.uc_mcontext.__gregs[_REG_PC] = sc->sc_pc;
uc.uc_mcontext.__gregs[_REG_nPC] = sc->sc_npc;
uc.uc_mcontext.__gregs[_REG_G1] = sc->sc_g1;
uc.uc_mcontext.__gregs[_REG_G2] = sc->sc_o0;
uc.uc_mcontext.__gregs[_REG_G3] = r->__glob[0];
uc.uc_mcontext.__gregs[_REG_G4] = r->__glob[1];
uc.uc_mcontext.__gregs[_REG_G5] = r->__glob[2];
uc.uc_mcontext.__gregs[_REG_G6] = r->__glob[3];
uc.uc_mcontext.__gregs[_REG_G7] = r->__glob[4];
uc.uc_mcontext.__gregs[_REG_O6] = sc->sc_sp;
/* Make return value non-zero */
if (val == 0)
val = 1;
/* Save return value in context */
uc.uc_mcontext.__gregs[_REG_O0] = val;
setcontext(&uc);
err:
longjmperror();
abort();
/* NOTREACHED */
}