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mcontext.h revision 1.1.2.2 
      1 /*	$NetBSD: mcontext.h,v 1.1.2.2 2001/11/21 08:56:25 wdk Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 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 _MIPS_MCONTEXT_H_
     40 #define _MIPS_MCONTEXT_H_
     41 
     42 /*
     43  * Layout of mcontext_t according to the System V Application Binary Interface,
     44  * MIPS(tm) Processor Supplement, 3rd Edition, Feburary 1996 (p 6-79)
     45  */
     46 
     47 /*
     48  * General register state
     49  */
     50 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32
     51 #define _NGREG		36	/* R0-R31, MDLO, MDHI, CAUSE, PC */
     52 #else
     53 #define _NGREG		37	/* R0-R31, MDLO, MDHI, CAUSE, PC, SR */
     54 #endif
     55 
     56 #define _REG_R0		0
     57 #define _REG_AT		1
     58 #define _REG_V0		2
     59 #define _REG_V1		3
     60 #define _REG_A0		4
     61 #define _REG_A1		5
     62 #define _REG_A2		6
     63 #define _REG_A3		7
     64 #define _REG_T0		8
     65 #define _REG_T1		9
     66 #define _REG_T2		10
     67 #define _REG_T3		11
     68 #define _REG_T4		12
     69 #define _REG_T5		13
     70 #define _REG_T6		14
     71 #define _REG_T7		15
     72 #define _REG_S0		16
     73 #define _REG_S1		17
     74 #define _REG_S2		18
     75 #define _REG_S3		19
     76 #define _REG_S4		20
     77 #define _REG_S5		21
     78 #define _REG_S6		22
     79 #define _REG_S7		23
     80 #define _REG_T8		24
     81 #define _REG_T9		25
     82 #define _REG_K0		26
     83 #define _REG_K1		27
     84 #define _REG_GP		28
     85 #define _REG_SP		29
     86 #define _REG_S8		30
     87 #define _REG_RA		31
     88 
     89 /* XXX: The following conflict with <mips/regnum.h> */
     90 #define _REG_MDLO	32
     91 #define _REG_MDHI	33
     92 #define _REG_CAUSE	34
     93 #define _REG_EPC	35
     94 #define _REG_SR		36
     95 
     96 #ifndef __ASSEMBLER__
     97 
     98 typedef	mips_reg_t	__greg_t;
     99 typedef	__greg_t	__gregset_t[_NGREG];
    100 
    101 /*
    102  * Floating point register state
    103  */
    104 typedef struct {
    105 	union {
    106 		double	__fp_dregs[16];
    107 		float	__fp_fregs[32];
    108 		__greg_t	__fp_regs[32];
    109 	} __fp_r;
    110 	u_int		__fp_csr;
    111 	u_int		__fp_pad;
    112 } __fpregset_t;
    113 
    114 typedef struct {
    115 	__gregset_t	__gregs;
    116 	__fpregset_t	__fpregs;
    117 } mcontext_t;
    118 
    119 #endif /* !__ASSEMBLER__ */
    120 
    121 #define _UC_MACHINE_PAD	48	/* Padding appended to ucontext_t */
    122 
    123 /*
    124  * Offsets relative to ucontext_t; intended to be used by assembly stubs.
    125  */
    126 #if !defined(_MIPS_BSD_API) || _MIPS_BSD_API == _MIPS_BSD_API_LP32
    127 #define _OFFSETOF_UC_GREGS	40
    128 #else
    129 #define _OFFSETOF_UC_GREGS	56
    130 #endif
    131 
    132 #endif	/* _MIPS_MCONTEXT_H_ */
    133