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mcontext.h revision 1.4 
      1 /*	$NetBSD: mcontext.h,v 1.4 2003/10/08 22:43:01 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999, 2002 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, and by Jason R. Thorpe of Wasabi Systems, Inc.
      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 _MIPS_MCONTEXT_H_
     40 #define _MIPS_MCONTEXT_H_
     41 
     42 /*
     43  * General register state
     44  */
     45 #define _NGREG		37	/* R0-R31, MDLO, MDHI, CAUSE, PC, SR */
     46 
     47 #define _REG_R0		0
     48 #define _REG_AT		1
     49 #define _REG_V0		2
     50 #define _REG_V1		3
     51 #define _REG_A0		4
     52 #define _REG_A1		5
     53 #define _REG_A2		6
     54 #define _REG_A3		7
     55 #define _REG_T0		8
     56 #define _REG_T1		9
     57 #define _REG_T2		10
     58 #define _REG_T3		11
     59 #define _REG_T4		12
     60 #define _REG_T5		13
     61 #define _REG_T6		14
     62 #define _REG_T7		15
     63 #define _REG_S0		16
     64 #define _REG_S1		17
     65 #define _REG_S2		18
     66 #define _REG_S3		19
     67 #define _REG_S4		20
     68 #define _REG_S5		21
     69 #define _REG_S6		22
     70 #define _REG_S7		23
     71 #define _REG_T8		24
     72 #define _REG_T9		25
     73 #define _REG_K0		26
     74 #define _REG_K1		27
     75 #define _REG_GP		28
     76 #define _REG_SP		29
     77 #define _REG_S8		30
     78 #define _REG_RA		31
     79 
     80 /* XXX: The following conflict with <mips/regnum.h> */
     81 #define _REG_MDLO	32
     82 #define _REG_MDHI	33
     83 #define _REG_CAUSE	34
     84 #define _REG_EPC	35
     85 #define _REG_SR		36
     86 
     87 #ifndef __ASSEMBLER__
     88 
     89 /* Make sure this is signed; we need pointers to be sign-extended. */
     90 #if defined(__mips_n32)
     91 typedef	long long       __greg_t;
     92 #else
     93 typedef	long            __greg_t;
     94 #endif /* __mips_n32 */
     95 
     96 typedef	__greg_t	__gregset_t[_NGREG];
     97 
     98 /*
     99  * Floating point register state
    100  */
    101 typedef struct {
    102 	union {
    103 		/*
    104 		 * For the o32 ABI, there are 16 doubles, one at each
    105 		 * even FP reg number.  For 64-bit ABIs, each FP register
    106 		 * is a 64-bit double.
    107 		 *
    108 		 * The FR bit in the SR indicates which FP mode is
    109 		 * in use.
    110 		 */
    111 		union {
    112 			double	__fp32_dregs[16];
    113 			float	__fp32_fregs[32];
    114 			unsigned int __fp32_regs[32];
    115 		} __fp_regs32;
    116 		union {
    117 			double	__fp64_dregs[32];
    118 			/* LONGLONG */
    119 			unsigned long long __fp64_regs[32];
    120 		} __fp_regs64;
    121 	} __fp_r;
    122 	unsigned int	__fp_csr;
    123 	unsigned int	__fp_pad;
    124 } __fpregset_t;
    125 
    126 typedef struct {
    127 	__gregset_t	__gregs;
    128 	__fpregset_t	__fpregs;
    129 } mcontext_t;
    130 
    131 #endif /* !__ASSEMBLER__ */
    132 
    133 #define _UC_MACHINE_PAD	16	/* Padding appended to ucontext_t */
    134 
    135 /*
    136  * Offsets relative to ucontext_t; intended to be used by assembly stubs.
    137  */
    138 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32
    139 #define _OFFSETOF_UC_GREGS	40
    140 #else
    141 #define _OFFSETOF_UC_GREGS	56
    142 #endif
    143 
    144 #define _UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[_REG_SP])
    145 #define _UC_MACHINE_PC(uc)	((uc)->uc_mcontext.__gregs[_REG_EPC])
    146 #define _UC_MACHINE_INTRV(uc)	((uc)->uc_mcontext.__gregs[_REG_V0])
    147 
    148 #define	_UC_MACHINE_SET_PC(uc, pc)	_UC_MACHINE_PC(uc) = (pc)
    149 
    150 #endif	/* _MIPS_MCONTEXT_H_ */
    151