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mcontext.h revision 1.4 
      1 /*	$NetBSD: mcontext.h,v 1.4 2003/11/22 17:05:53 uwe 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _SH3_MCONTEXT_H_
     40 #define _SH3_MCONTEXT_H_
     41 
     42 /*
     43  * Layout of mcontext_t for the sh3 architecture.
     44  */
     45 
     46 #define _NGREG		22
     47 typedef int		__greg_t;
     48 typedef __greg_t	__gregset_t[_NGREG];
     49 
     50 #define	_REG_EXPEVT	0
     51 #define	_REG_PC		1
     52 #define	_REG_SR		2
     53 #define	_REG_MACL	3
     54 #define	_REG_MACH	4
     55 #define	_REG_PR		5
     56 #define	_REG_R14	6
     57 #define	_REG_R13	7
     58 #define	_REG_R12	8
     59 #define	_REG_R11	9
     60 #define	_REG_R10	10
     61 #define	_REG_R9		11
     62 #define	_REG_R8		12
     63 #define	_REG_R7		13
     64 #define	_REG_R6		14
     65 #define	_REG_R5		15
     66 #define	_REG_R4		16
     67 #define	_REG_R3		17
     68 #define	_REG_R2		18
     69 #define	_REG_R1		19
     70 #define	_REG_R0		20
     71 #define	_REG_R15	21
     72 /* Convenience synonym */
     73 #define	_REG_SP		_REG_R15
     74 
     75 /*
     76  * FPU state description.
     77  * XXX: kernel doesn't support FPU yet, so this is just a placeholder.
     78  */
     79 typedef struct {
     80 	int		__fpr_fpscr;
     81 	int		__fpr_fpul;
     82 	/* XXX: redefine as a union when we do support FPU */
     83 	int		__fpr_regs[32];	/* SH3E has 16, SH4 has 32 */
     84 } __fpregset_t;
     85 
     86 typedef struct {
     87 	__gregset_t	__gregs;
     88 	__fpregset_t	__fpregs;
     89 } mcontext_t;
     90 
     91 #define	_UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[_REG_SP])
     92 #define	_UC_MACHINE_PC(uc)	((uc)->uc_mcontext.__gregs[_REG_PC])
     93 #define	_UC_MACHINE_INTRV(uc)	((uc)->uc_mcontext.__gregs[_REG_R0])
     94 
     95 #define	_UC_MACHINE_SET_PC(uc, pc)	_UC_MACHINE_PC(uc) = (pc)
     96 
     97 /*
     98  * Machine dependent uc_flags
     99  */
    100 #define	_UC_SETSTACK		0x10000
    101 #define	_UC_CLRSTACK		0x20000
    102 
    103 
    104 #endif /* !_SH3_MCONTEXT_H_ */
    105