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mcontext.h revision 1.8 
      1 /*	$NetBSD: mcontext.h,v 1.8 2008/04/28 20:23:28 martin 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  *
     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 _MIPS_MCONTEXT_H_
     33 #define _MIPS_MCONTEXT_H_
     34 
     35 /*
     36  * General register state
     37  */
     38 #define _NGREG		37	/* R0-R31, MDLO, MDHI, CAUSE, PC, SR */
     39 
     40 #define _REG_R0		0
     41 #define _REG_AT		1
     42 #define _REG_V0		2
     43 #define _REG_V1		3
     44 #define _REG_A0		4
     45 #define _REG_A1		5
     46 #define _REG_A2		6
     47 #define _REG_A3		7
     48 #define _REG_T0		8
     49 #define _REG_T1		9
     50 #define _REG_T2		10
     51 #define _REG_T3		11
     52 #define _REG_T4		12
     53 #define _REG_T5		13
     54 #define _REG_T6		14
     55 #define _REG_T7		15
     56 #define _REG_S0		16
     57 #define _REG_S1		17
     58 #define _REG_S2		18
     59 #define _REG_S3		19
     60 #define _REG_S4		20
     61 #define _REG_S5		21
     62 #define _REG_S6		22
     63 #define _REG_S7		23
     64 #define _REG_T8		24
     65 #define _REG_T9		25
     66 #define _REG_K0		26
     67 #define _REG_K1		27
     68 #define _REG_GP		28
     69 #define _REG_SP		29
     70 #define _REG_S8		30
     71 #define _REG_RA		31
     72 
     73 /* XXX: The following conflict with <mips/regnum.h> */
     74 #define _REG_MDLO	32
     75 #define _REG_MDHI	33
     76 #define _REG_CAUSE	34
     77 #define _REG_EPC	35
     78 #define _REG_SR		36
     79 
     80 #ifndef __ASSEMBLER__
     81 
     82 /* Make sure this is signed; we need pointers to be sign-extended. */
     83 #if defined(__mips_n32)
     84 typedef	long long       __greg_t;
     85 #else
     86 typedef	long            __greg_t;
     87 #endif /* __mips_n32 */
     88 
     89 typedef	__greg_t	__gregset_t[_NGREG];
     90 
     91 /*
     92  * For the O32 ABI, there are 16 doubles, one at each even FP reg
     93  * number.  The FP registers themselves are 32-bits.
     94  *
     95  * For 64-bit ABIs (include N32), each FP register is a 64-bit double.
     96  */
     97 typedef	__greg_t	__freg_t;
     98 
     99 /*
    100  * Floating point register state
    101  */
    102 #if defined(__mips_n32) || defined(_LP64)
    103 typedef struct {
    104 	union {
    105 		double	__fp64_dregs[32];
    106 		__freg_t __fp_regs[32];
    107 	} __fp_r;
    108 	unsigned int	__fp_csr;
    109 	unsigned int	__fp_pad;
    110 } __fpregset_t;
    111 #else /* !(__mips_n32 || _LP64) */
    112 typedef struct {
    113 	union {
    114 		double	__fp_dregs[16];
    115 		float	__fp_fregs[32];
    116 		__freg_t __fp_regs[32];
    117 	} __fp_r;
    118 	unsigned int	__fp_csr;
    119 	unsigned int	__fp_pad;
    120 } __fpregset_t;
    121 #endif /* !(__mips_n32 || _LP64) */
    122 
    123 typedef struct {
    124 	__gregset_t	__gregs;
    125 	__fpregset_t	__fpregs;
    126 } mcontext_t;
    127 
    128 #endif /* !__ASSEMBLER__ */
    129 
    130 #define _UC_MACHINE_PAD	16	/* Padding appended to ucontext_t */
    131 
    132 /*
    133  * Offsets relative to ucontext_t; intended to be used by assembly stubs.
    134  */
    135 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32
    136 #define _OFFSETOF_UC_GREGS	40
    137 #else
    138 #define _OFFSETOF_UC_GREGS	56
    139 #endif
    140 
    141 #define	_UC_SETSTACK	0x00010000
    142 #define	_UC_CLRSTACK	0x00020000
    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