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      1 /*	$NetBSD: mcontext.h,v 1.15 2024/11/30 01:04:15 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Klaus Klein.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _VAX_MCONTEXT_H_
     33 #define _VAX_MCONTEXT_H_
     34 
     35 /*
     36  * Layout of mcontext_t.
     37  * As on Alpha, this maps directly to `struct reg'.
     38  */
     39 
     40 #define	_NGREG	17		/* R0-31, AP, SP, FP, PC, PSL */
     41 
     42 typedef	int		__greg_t;
     43 typedef	__greg_t	__gregset_t[_NGREG];
     44 
     45 #define	_REG_R0		0
     46 #define	_REG_R1		1
     47 #define	_REG_R2		2
     48 #define	_REG_R3		3
     49 #define	_REG_R4		4
     50 #define	_REG_R5		5
     51 #define	_REG_R6		6
     52 #define	_REG_R7		7
     53 #define	_REG_R8		8
     54 #define	_REG_R9		9
     55 #define	_REG_R10	10
     56 #define	_REG_R11	11
     57 #define	_REG_AP		12
     58 #define	_REG_FP		13
     59 #define	_REG_SP		14
     60 #define	_REG_PC		15
     61 #define	_REG_PSL	16
     62 
     63 typedef struct {
     64 	__gregset_t	__gregs;	/* General Purpose Register set */
     65 } mcontext_t;
     66 
     67 /* Machine-dependent uc_flags */
     68 #define	_UC_SETSTACK	_UC_MD_BIT16
     69 #define	_UC_CLRSTACK	_UC_MD_BIT17
     70 #define	_UC_TLSBASE	_UC_MD_BIT19
     71 
     72 #define	_UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[_REG_SP])
     73 #define	_UC_MACHINE_FP(uc)	((uc)->uc_mcontext.__gregs[_REG_FP])
     74 #define	_UC_MACHINE_PC(uc)	((uc)->uc_mcontext.__gregs[_REG_PC])
     75 #define	_UC_MACHINE_INTRV(uc)	((uc)->uc_mcontext.__gregs[_REG_R0])
     76 
     77 #define	_UC_MACHINE_SET_PC(uc, pc)	_UC_MACHINE_PC(uc) = (pc)
     78 
     79 #endif	/* !_VAX_MCONTEXT_H_ */
     80