minix/lib/nbsd_libc/arch/m68k/gen/longjmp.c
Gianluca Guida b6cbf7203b Import unmodified NetBSD libc in trunk
This patch imports the unmodified current version of NetBSD libc.
The NetBSD includes are in /nbsd_include, while the libc code itself is 
split between lib/nbsd_libc and common/lib/libc.
2011-02-14 19:36:03 +00:00

96 lines
2.9 KiB
C

/* $NetBSD: longjmp.c,v 1.2 2008/04/28 20:22:56 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>
typedef struct {
__greg_t __data[6];
__greg_t __addr[4];
} __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;
/* Make return value non-zero */
if (val == 0)
val = 1;
/* Save return value in context */
uc.uc_mcontext.__gregs[_REG_D0] = val;
/*
* Set _UC_SIGMASK, _UC_CPU and _UC_M68K_UC_USER
* Set _UC_{SET,CLR}STACK according to SS_ONSTACK
*/
uc.uc_flags = _UC_SIGMASK | _UC_CPU | _UC_M68K_UC_USER |
(sc->sc_onstack ? _UC_SETSTACK : _UC_CLRSTACK);
/* Clear uc_link */
uc.uc_link = 0;
/* Copy signal mask */
uc.uc_sigmask = sc->sc_mask;
/* Copy SP/PC/PS/FP */
uc.uc_mcontext.__gregs[_REG_A7] = sc->sc_sp;
uc.uc_mcontext.__gregs[_REG_PC] = sc->sc_pc;
uc.uc_mcontext.__gregs[_REG_PS] = sc->sc_ps;
uc.uc_mcontext.__gregs[_REG_A6] = sc->sc_fp;
/* Copy remaining non-scratch regs. */
memcpy(&uc.uc_mcontext.__gregs[_REG_D2],
&r->__data, sizeof(r->__data));
memcpy(&uc.uc_mcontext.__gregs[_REG_A2],
&r->__addr, sizeof(r->__addr));
setcontext(&uc);
err:
longjmperror();
abort();
/* NOTREACHED */
}