b6cbf7203b
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.
96 lines
2.9 KiB
C
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 */
|
|
}
|