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/* $OpenBSD: mcontext.h,v 1.2 2008/06/26 05:42:09 ray Exp $ */
/* $NetBSD: mcontext.h,v 1.1 2003/04/26 18:39:44 fvdl Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* 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.
*/
#ifndef _AMD64_MCONTEXT_H_
#define _AMD64_MCONTEXT_H_
/*
* Layout of mcontext_t according to the System V Application Binary Interface,
* Intel386(tm) Architecture Processor Supplement, Fourth Edition.
*/
/*
* General register state
*/
#define _NGREG 26
typedef long __greg_t;
typedef __greg_t __gregset_t[_NGREG];
/*
* This is laid out to match trapframe and intrframe (see <machine/frame.h>).
* Hence, memcpy between gregs and a trapframe is possible.
*/
#define _REG_RDI 0
#define _REG_RSI 1
#define _REG_RDX 2
#define _REG_RCX 3
#define _REG_R8 4
#define _REG_R9 5
#define _REG_R10 6
#define _REG_R11 7
#define _REG_R12 8
#define _REG_R13 9
#define _REG_R14 10
#define _REG_R15 11
#define _REG_RBP 12
#define _REG_RBX 13
#define _REG_RAX 14
#define _REG_GS 15
#define _REG_FS 16
#define _REG_ES 17
#define _REG_DS 18
#define _REG_TRAPNO 19
#define _REG_ERR 20
#define _REG_RIP 21
#define _REG_CS 22
#define _REG_RFL 23
#define _REG_URSP 24
#define _REG_SS 25
/*
* Floating point register state
*/
typedef char __fpregset_t[512];
/*
* The padding below is to make __fpregs have a 16-byte aligned offset
* within ucontext_t.
*/
typedef struct {
__gregset_t __gregs;
long __pad;
__fpregset_t __fpregs;
} mcontext_t;
#define _UC_UCONTEXT_ALIGN (~0xf)
#ifdef _KERNEL
#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_URSP])
#endif
#endif /* !_AMD64_MCONTEXT_H_ */
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