/*      $NetBSD: mcontext.h,v 1.15 2024/11/30 01:04:15 christos Exp $   */

/*-
* Copyright (c) 2001 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 _VAX_MCONTEXT_H_
#define _VAX_MCONTEXT_H_

/*
* Layout of mcontext_t.
* As on Alpha, this maps directly to `struct reg'.
*/

#define _NGREG  17              /* R0-31, AP, SP, FP, PC, PSL */

typedef int             __greg_t;
typedef __greg_t        __gregset_t[_NGREG];

#define _REG_R0         0
#define _REG_R1         1
#define _REG_R2         2
#define _REG_R3         3
#define _REG_R4         4
#define _REG_R5         5
#define _REG_R6         6
#define _REG_R7         7
#define _REG_R8         8
#define _REG_R9         9
#define _REG_R10        10
#define _REG_R11        11
#define _REG_AP         12
#define _REG_FP         13
#define _REG_SP         14
#define _REG_PC         15
#define _REG_PSL        16

typedef struct {
       __gregset_t     __gregs;        /* General Purpose Register set */
} mcontext_t;

/* Machine-dependent uc_flags */
#define _UC_SETSTACK    _UC_MD_BIT16
#define _UC_CLRSTACK    _UC_MD_BIT17
#define _UC_TLSBASE     _UC_MD_BIT19

#define _UC_MACHINE_SP(uc)      ((uc)->uc_mcontext.__gregs[_REG_SP])
#define _UC_MACHINE_FP(uc)      ((uc)->uc_mcontext.__gregs[_REG_FP])
#define _UC_MACHINE_PC(uc)      ((uc)->uc_mcontext.__gregs[_REG_PC])
#define _UC_MACHINE_INTRV(uc)   ((uc)->uc_mcontext.__gregs[_REG_R0])

#define _UC_MACHINE_SET_PC(uc, pc)      _UC_MACHINE_PC(uc) = (pc)

#endif  /* !_VAX_MCONTEXT_H_ */