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ucontext.h
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ucontext.h
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/* $NetBSD: ucontext.h,v 1.9 2006/08/20 08:02:21 skrll Exp $ */
/*-
* Copyright (c) 1999, 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein, and by Jason R. Thorpe.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
*/
#ifndef _SYS_UCONTEXT_H_
#define _SYS_UCONTEXT_H_
#include <sys/sigtypes.h>
#include <machine/mcontext.h>
typedef struct __ucontext ucontext_t;
struct __ucontext {
unsigned int uc_flags; /* properties */
ucontext_t * uc_link; /* context to resume */
sigset_t uc_sigmask; /* signals blocked in this context */
stack_t uc_stack; /* the stack used by this context */
mcontext_t uc_mcontext; /* machine state */
#if defined(_UC_MACHINE_PAD)
long __uc_pad[_UC_MACHINE_PAD];
#endif
};
#ifndef _UC_UCONTEXT_ALIGN
#define _UC_UCONTEXT_ALIGN (~0)
#endif
/* uc_flags */
#define _UC_SIGMASK 0x01 /* valid uc_sigmask */
#define _UC_STACK 0x02 /* valid uc_stack */
#define _UC_CPU 0x04 /* valid GPR context in uc_mcontext */
#define _UC_FPU 0x08 /* valid FPU context in uc_mcontext */
#ifdef _KERNEL
struct lwp;
void getucontext(struct lwp *, ucontext_t *);
int setucontext(struct lwp *, const ucontext_t *);
void cpu_getmcontext(struct lwp *, mcontext_t *, unsigned int *);
int cpu_setmcontext(struct lwp *, const mcontext_t *, unsigned int);
#endif /* _KERNEL */
#endif /* !_SYS_UCONTEXT_H_ */