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 2010 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
28 /* All Rights Reserved */
29
30 #ifndef _SYS_UCONTEXT_H
31 #define _SYS_UCONTEXT_H
32
33 #include <sys/feature_tests.h>
34
35 #include <sys/types.h>
36 #include <sys/regset.h>
37 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
38 #include <sys/signal.h>
39 #endif
40
41 #ifdef __cplusplus
42 extern "C" {
43 #endif
44
45 /*
46 * Inclusion of <sys/signal.h> for sigset_t and stack_t definitions
47 * breaks XPG4v2 namespace. Therefore we must duplicate the defines
48 * for these types here when _XPG4_2 is defined.
49 */
50
51 #if defined(_XPG4_2) && !defined(__EXTENSIONS__)
52 #ifndef _SIGSET_T
53 #define _SIGSET_T
54 typedef struct { /* signal set type */
55 unsigned long __sigbits[4];
56 } sigset_t;
57 #endif /* _SIGSET_T */
58
59 #ifndef _STACK_T
60 #define _STACK_T
61 typedef struct {
62 void *ss_sp;
63 size_t ss_size;
64 int ss_flags;
65 } stack_t;
66 #endif /* _STACK_T */
67 #endif /* defined(_XPG4_2) && !defined(__EXTENSIONS__) */
68
69 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
70 typedef struct ucontext ucontext_t;
71 #else
72 typedef struct __ucontext ucontext_t;
73 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
74
75 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
76 struct ucontext {
77 #else
78 struct __ucontext {
79 #endif
80 unsigned long uc_flags;
81 ucontext_t *uc_link;
82 sigset_t uc_sigmask;
83 stack_t uc_stack;
84 mcontext_t uc_mcontext;
85 long uc_filler[5]; /* see ABI spec for Intel386 */
86 };
87
88 #if defined(_SYSCALL32)
89
90 /* Kernel view of user ILP32 ucontext structure */
91
92 typedef struct ucontext32 {
93 uint32_t uc_flags;
94 caddr32_t uc_link;
95 sigset_t uc_sigmask;
96 stack32_t uc_stack;
97 mcontext32_t uc_mcontext;
98 int32_t uc_filler[5];
99 } ucontext32_t;
100
101 #if defined(_KERNEL)
102 extern void ucontext_nto32(const ucontext_t *src, ucontext32_t *dest);
103 extern void ucontext_32ton(const ucontext32_t *src, ucontext_t *dest);
104 #endif
105
106 #endif /* _SYSCALL32 */
107
108 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
109 #define GETCONTEXT 0
110 #define SETCONTEXT 1
111 #define GETUSTACK 2
112 #define SETUSTACK 3
113
114 /*
115 * values for uc_flags
116 * these are implementation dependent flags, that should be hidden
117 * from the user interface, defining which elements of ucontext
118 * are valid, and should be restored on call to setcontext
119 */
120
121 #define UC_SIGMASK 0x01
122 #define UC_STACK 0x02
123 #define UC_CPU 0x04
124 #define UC_MAU 0x08
125 #define UC_FPU UC_MAU
126
127 #define UC_MCONTEXT (UC_CPU|UC_FPU)
128
129 /*
130 * UC_ALL specifies the default context
131 */
132
133 #define UC_ALL (UC_SIGMASK|UC_STACK|UC_MCONTEXT)
134 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
135
136 #ifdef _KERNEL
137 void savecontext(ucontext_t *, const k_sigset_t *);
138 void restorecontext(ucontext_t *);
139
140 #ifdef _SYSCALL32
141 extern void savecontext32(ucontext32_t *, const k_sigset_t *);
142 #endif
143 #endif
144
145 #ifdef __cplusplus
146 }
147 #endif
148
149 #endif /* _SYS_UCONTEXT_H */