1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
24 *
25 * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
26 * Use is subject to license terms.
27 */
28
29/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
30/*	  All Rights Reserved  	*/
31
32#ifndef _SYS_UCONTEXT_H
33#define	_SYS_UCONTEXT_H
34
35#include <sys/feature_tests.h>
36
37#include <sys/types.h>
38#include <sys/mcontext.h>
39#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
40#include <sys/signal.h>
41#endif
42
43#ifdef	__cplusplus
44extern "C" {
45#endif
46
47/*
48 * Inclusion of <sys/signal.h> for sigset_t and stack_t definitions
49 * breaks XPG4v2 namespace.  Therefore we must duplicate the defines
50 * for these types here when _XPG4_2 is defined.
51 */
52
53#if defined(_XPG4_2) && !defined(__EXTENSIONS__)
54#ifndef	_SIGSET_T
55#define	_SIGSET_T
56typedef	struct {	/* signal set type */
57	unsigned int	__sigbits[4];
58} sigset_t;
59#endif /* _SIGSET_T */
60
61#ifndef	_STACK_T
62#define	_STACK_T
63typedef	struct {
64	void	*ss_sp;
65	size_t	ss_size;
66	int	ss_flags;
67} stack_t;
68
69#endif /* _STACK_T */
70#endif /* defined(_XPG4_2) && !defined(__EXTENSIONS__) */
71
72#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
73typedef	struct ucontext ucontext_t;
74#else
75typedef	struct __ucontext ucontext_t;
76#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
77
78#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
79struct	ucontext {
80#else
81struct	__ucontext {
82#endif
83	uint_t		uc_flags;
84	ucontext_t	*uc_link;
85	sigset_t   	uc_sigmask;
86	stack_t 	uc_stack;
87	mcontext_t	uc_mcontext;
88#ifdef	__sparcv9
89	long		uc_filler[4];
90#else	/* __sparcv9 */
91	long		uc_filler[23];
92#endif	/* __sparcv9 */
93};
94
95#ifdef _SYSCALL32
96
97/* Kernel view of user ILP32 ucontext structure */
98
99typedef struct ucontext32 {
100	uint32_t	uc_flags;
101	caddr32_t	uc_link;
102	sigset_t	uc_sigmask;
103	stack32_t	uc_stack;
104	mcontext32_t	uc_mcontext;
105	int32_t		uc_filler[23];
106} ucontext32_t;
107
108#ifdef _KERNEL
109extern void ucontext_32ton(const ucontext32_t *, ucontext_t *,
110    const struct fq32 *, struct _fq *);
111extern void fpuregset_nto32(const fpregset_t *, fpregset32_t *, struct fq32 *);
112#endif
113
114#endif	/* _SYSCALL32 */
115
116#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
117#define	GETCONTEXT	0
118#define	SETCONTEXT	1
119#define	GETUSTACK	2
120#define	SETUSTACK	3
121
122/*
123 * values for uc_flags
124 * these are implementation dependent flags, that should be hidden
125 * from the user interface, defining which elements of ucontext
126 * are valid, and should be restored on call to setcontext
127 */
128
129#define	UC_SIGMASK	0x01
130#define	UC_STACK	0x02
131#define	UC_CPU		0x04
132#define	UC_MAU		0x08
133#define	UC_FPU		UC_MAU
134#define	UC_INTR		0x10
135#define	UC_ASR		0x20
136
137#define	UC_MCONTEXT	(UC_CPU|UC_FPU|UC_ASR)
138
139/*
140 * UC_ALL specifies the default context
141 */
142
143#define	UC_ALL		(UC_SIGMASK|UC_STACK|UC_MCONTEXT)
144#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
145
146#ifdef _KERNEL
147extern void savecontext(ucontext_t *, const k_sigset_t *);
148extern void restorecontext(ucontext_t *);
149
150#ifdef _SYSCALL32
151extern void savecontext32(ucontext32_t *, const k_sigset_t *, struct fq32 *);
152#endif
153#endif
154
155#ifdef	__cplusplus
156}
157#endif
158
159#endif /* _SYS_UCONTEXT_H */
160