xref: /netbsd-src/sys/arch/sparc/include/mcontext.h (revision d710132b4b8ce7f7cccaaf660cb16aa16b4077a0)
1 /*	$NetBSD: mcontext.h,v 1.2 2003/01/18 06:44:56 thorpej 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 _SPARC_MCONTEXT_H_
40 #define _SPARC_MCONTEXT_H_
41 
42 /*
43  * Layout of mcontext_t according the System V Application Binary Interface,
44  * Edition 4.1, SPARC Processor ABI Supplement and updated for SPARC v9.
45  */
46 
47 #ifdef __arch64__
48 #define	_NGREG	21	/* %ccr, pc, npc, %g1-7, %o0-7, %asi, %fprs */
49 #else
50 #define	_NGREG	19	/* %psr, pc, npc, %g1-7, %o0-7 */
51 #endif
52 typedef	long int	__greg_t;
53 typedef	__greg_t	__gregset_t[_NGREG];
54 
55 /* Offsets into gregset_t, for convenience. */
56 #ifdef __arch64__
57 #define	_REG_CCR	0
58 #else
59 #define	_REG_PSR	0
60 #endif
61 #define	_REG_PC		1
62 #define	_REG_nPC	2
63 #define	_REG_Y		3
64 #define	_REG_G1		4
65 #define	_REG_G2		5
66 #define	_REG_G3		6
67 #define	_REG_G4		7
68 #define	_REG_G5		8
69 #define	_REG_G6		9
70 #define	_REG_G7		10
71 #define	_REG_O0		11
72 #define	_REG_O1		12
73 #define	_REG_O2		13
74 #define	_REG_O3		14
75 #define	_REG_O4		15
76 #define	_REG_O5		16
77 #define	_REG_O6		17
78 #define	_REG_O7		18
79 #ifdef __arch64__
80 #define	_REG_ASI	19
81 #define	_REG_FPRS	20
82 #endif
83 
84 
85 #define	_SPARC_MAXREGWINDOW	31
86 
87 /* Layout of a register window. */
88 typedef struct {
89 	__greg_t	__rw_local[8];	/* %l0-7 */
90 	__greg_t	__rw_in[8];	/* %i0-7 */
91 } __rwindow_t;
92 
93 /* Description of available register windows. */
94 typedef struct {
95 	int		__wbcnt;
96 	__greg_t *	__spbuf[_SPARC_MAXREGWINDOW];
97 	__rwindow_t	__wbuf[_SPARC_MAXREGWINDOW];
98 } __gwindows_t;
99 
100 /* FPU address queue */
101 struct __fpq {
102 	unsigned int *	__fpq_addr;	/* address */
103 	unsigned int	__fpq_instr;	/* instruction */
104 };
105 
106 struct __fq {
107 	union {
108 		double		__whole;
109 		struct __fpq	__fpq;
110 	} _FQu;
111 };
112 
113 /* FPU state description */
114 typedef struct {
115 	union {
116 		unsigned int	__fpu_regs[32];
117 #ifdef __arch64__
118 		double		__fpu_dregs[32];
119 		long double	__fpu_qregs[16];
120 #else
121 		double		__fpu_dregs[16];
122 #endif
123 	} __fpu_fr;				/* FPR contents */
124 	struct __fq *	__fpu_q;		/* pointer to FPU insn queue */
125 	unsigned long	__fpu_fsr;		/* %fsr */
126 	unsigned char	__fpu_qcnt;		/* # entries in __fpu_q */
127 	unsigned char	__fpu_q_entrysize; 	/* size of a __fpu_q entry */
128 	unsigned char	__fpu_en;		/* this context valid? */
129 } __fpregset_t;
130 
131 /* `Extra Register State'(?) */
132 typedef struct {
133 	unsigned int	__xrs_id;	/* See below */
134 	char *		__xrs_ptr;	/* points into filler area */
135 } __xrs_t;
136 
137 #define	_XRS_ID		0x78727300	/* 'xrs\0' */
138 
139 #ifdef __arch64__
140 /* Ancillary State Registers, 16-31 are available to user programs */
141 typedef	long		__asrset_t[16];	/* %asr16-31 */
142 #endif
143 
144 typedef struct {
145 	__gregset_t	__gregs;	/* GPR state */
146 	__gwindows_t *	__gwins;	/* may point to register windows */
147 	__fpregset_t	__fpregs;	/* FPU state, if any */
148 	__xrs_t		__xrs;		/* may indicate extra reg state */
149 #ifdef __arch64__
150 	__asrset_t	__asrs;		/* ASR state */
151 #endif
152 #ifdef __arch64__
153 	long int	__filler[4];
154 #else
155 	long int	__filler[19];
156 #endif
157 } mcontext_t;
158 
159 #ifdef __arch64__
160 #define _UC_MACHINE_PAD	4		/* Padding appended to ucontext_t */
161 #define	_UC_MACHINE_SP(uc)	(((uc)->uc_mcontext.__gregs[_REG_O6])+0x7ff)
162 #else
163 #define _UC_MACHINE_PAD	23		/* Padding appended to ucontext_t */
164 #define	_UC_MACHINE_SP(uc)	((uc)->uc_mcontext.__gregs[_REG_O6])
165 #endif
166 
167 #endif	/* !_SPARC_MCONTEXT_H_ */
168