minix/lib/libc/arch/hppa/gen/__longjmp14.c

119 lines
3.7 KiB
C
Raw Normal View History

/* $NetBSD: __longjmp14.c,v 1.4 2008/04/28 20:22:55 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>
#define __LIBC12_SOURCE__
#include <setjmp.h>
#include <compat/include/setjmp.h>
#include <stdio.h>
#include <unistd.h>
ssize_t _sys_write(int, void *, size_t);
void
__longjmp14(jmp_buf env, int val)
{
ucontext_t uc;
struct sigcontext *sc = (void *)env;
register_t *regs = (void *)(sc + 1);
register register_t dp __asm("r27");
/* Ensure non-zero SP */
if (sc->sc_sp == 0)
goto err;
/* Make return value non-zero */
if (val == 0)
val = 1;
/* Copy callee-saved regs */
regs -= 3;
uc.uc_mcontext.__gregs[3] = regs[3];
uc.uc_mcontext.__gregs[4] = regs[4];
uc.uc_mcontext.__gregs[5] = regs[5];
uc.uc_mcontext.__gregs[6] = regs[6];
uc.uc_mcontext.__gregs[7] = regs[7];
uc.uc_mcontext.__gregs[8] = regs[8];
uc.uc_mcontext.__gregs[9] = regs[9];
uc.uc_mcontext.__gregs[10] = regs[10];
uc.uc_mcontext.__gregs[11] = regs[11];
uc.uc_mcontext.__gregs[12] = regs[12];
uc.uc_mcontext.__gregs[13] = regs[13];
uc.uc_mcontext.__gregs[14] = regs[14];
uc.uc_mcontext.__gregs[15] = regs[15];
uc.uc_mcontext.__gregs[16] = regs[16];
uc.uc_mcontext.__gregs[17] = regs[17];
uc.uc_mcontext.__gregs[18] = regs[18];
/* Preserve the current value of DP */
uc.uc_mcontext.__gregs[27] = dp;
/* Set the desired return value. */
uc.uc_mcontext.__gregs[_REG_RET0] = val;
/*
* 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;
/* Copy signal mask */
uc.uc_sigmask = sc->sc_mask;
/* Copy special regs */
uc.uc_mcontext.__gregs[_REG_PSW] = sc->sc_ps;
uc.uc_mcontext.__gregs[_REG_SP] = sc->sc_sp;
uc.uc_mcontext.__gregs[_REG_PCSQH] = sc->sc_pcsqh;
uc.uc_mcontext.__gregs[_REG_PCOQH] = sc->sc_pcoqh;
uc.uc_mcontext.__gregs[_REG_PCSQT] = sc->sc_pcsqt;
uc.uc_mcontext.__gregs[_REG_PCOQT] = sc->sc_pcoqt;
setcontext(&uc);
err:
longjmperror();
abort();
/* NOTREACHED */
}