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      1 /*	$NetBSD: mcontext.h,v 1.15 2024/11/30 01:04:06 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 _ALPHA_MCONTEXT_H_
     33 #define _ALPHA_MCONTEXT_H_
     34 
     35 /*
     36  * General register state (important: 0-31 maps to `struct reg')
     37  */
     38 #define _NGREG		34	/* 0-31, PC, PS */
     39 typedef	unsigned long	__greg_t;
     40 typedef	__greg_t	__gregset_t[_NGREG];
     41 
     42 /* Convenience synonyms */
     43 #define	_REG_V0		0
     44 #define	_REG_T0		1
     45 #define	_REG_T1		2
     46 #define	_REG_T2		3
     47 #define	_REG_T3		4
     48 #define	_REG_T4		5
     49 #define	_REG_T5		6
     50 #define	_REG_T6		7
     51 #define	_REG_T7		8
     52 #define	_REG_S0		9
     53 #define	_REG_S1		10
     54 #define	_REG_S2		11
     55 #define	_REG_S3		12
     56 #define	_REG_S4		13
     57 #define	_REG_S5		14
     58 #define	_REG_S6		15
     59 #define	_REG_A0		16
     60 #define	_REG_A1		17
     61 #define	_REG_A2		18
     62 #define	_REG_A3		19
     63 #define	_REG_A4		20
     64 #define	_REG_A5		21
     65 #define	_REG_T8		22
     66 #define	_REG_T9		23
     67 #define	_REG_T10	24
     68 #define	_REG_T11	25
     69 #define	_REG_RA		26
     70 #define	_REG_T12	27
     71 #define	_REG_PV		27
     72 #define	_REG_AT		28
     73 #define	_REG_GP		29
     74 #define	_REG_SP		30
     75 #define	_REG_UNIQUE	31
     76 #define	_REG_PC		32
     77 #define	_REG_PS		33
     78 
     79 /*
     80  * Floating point register state (important: maps to `struct fpreg')
     81  */
     82 typedef struct {
     83 	union {
     84 		unsigned long	__fp_regs[32];
     85 		double		__fp_dregs[32];
     86 	}		__fp_fr;
     87 	unsigned long	__fp_fpcr;
     88 } __fpregset_t;
     89 
     90 typedef struct {
     91 	__gregset_t	__gregs;
     92 	__fpregset_t	__fpregs;
     93 } mcontext_t;
     94 
     95 /* Machine-dependent uc_flags */
     96 #define _UC_TLSBASE	_UC_MD_BIT5	/* valid value in _REG_UNIQUE */
     97 #define _UC_SETSTACK	_UC_MD_BIT16
     98 #define _UC_CLRSTACK	_UC_MD_BIT17
     99 
    100 #define _UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[_REG_SP])
    101 #define _UC_MACHINE_FP(uc)	((uc)->uc_mcontext.__gregs[_REG_S6])
    102 #define _UC_MACHINE_PC(uc)	((uc)->uc_mcontext.__gregs[_REG_PC])
    103 #define _UC_MACHINE_INTRV(uc)	((uc)->uc_mcontext.__gregs[_REG_V0])
    104 
    105 #define	_UC_MACHINE_SET_PC(uc, pc)	_UC_MACHINE_PC(uc) = (pc)
    106 
    107 #endif	/* !_ALPHA_MCONTEXT_H_ */
    108