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 #define XRS_ID 0x00737278 /* the string "xrs" */
76
77 typedef struct {
78 unsigned long xrs_id;
79 caddr_t xrs_ptr;
80 } xrs_t;
81
82 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
83 struct ucontext {
84 #else
85 struct __ucontext {
86 #endif
87 unsigned long uc_flags;
88 ucontext_t *uc_link;
89 sigset_t uc_sigmask;
90 stack_t uc_stack;
91 mcontext_t uc_mcontext;
92 xrs_t uc_xrs;
93 long uc_filler[3]; /* see ABI spec for Intel386 */
94 };
95
96 #if defined(_SYSCALL32)
97
98 typedef struct {
99 uint32_t xrs_id;
100 caddr32_t xrs_ptr;
101 } xrs32_t;
102
103 /* Kernel view of user ILP32 ucontext structure */
104
105 typedef struct ucontext32 {
106 uint32_t uc_flags;
107 caddr32_t uc_link;
108 sigset_t uc_sigmask;
109 stack32_t uc_stack;
110 mcontext32_t uc_mcontext;
111 xrs32_t uc_xrs;
112 int32_t uc_filler[3];
113 } ucontext32_t;
114
115 #if defined(_KERNEL)
116 extern void ucontext_nto32(const ucontext_t *src, ucontext32_t *dest);
117 extern void ucontext_32ton(const ucontext32_t *src, ucontext_t *dest);
118 #endif
119
120 #endif /* _SYSCALL32 */
121
122 #if !defined(_XPG4_2) || defined(__EXTENSIONS__)
123 #define GETCONTEXT 0
124 #define SETCONTEXT 1
125 #define GETUSTACK 2
126 #define SETUSTACK 3
127
128 /*
129 * values for uc_flags
130 * these are implementation dependent flags, that should be hidden
131 * from the user interface, defining which elements of ucontext
132 * are valid, and should be restored on call to setcontext
133 */
134
135 #define UC_SIGMASK 0x01
136 #define UC_STACK 0x02
137 #define UC_CPU 0x04
138 #define UC_MAU 0x08
139 #define UC_XREGS 0x10
140 #define UC_FPU UC_MAU
141
142 #define UC_MCONTEXT (UC_CPU|UC_FPU)
143
144 /*
145 * UC_ALL specifies the default context
146 */
147
148 #define UC_ALL (UC_SIGMASK|UC_STACK|UC_MCONTEXT)
149 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
150
151 #ifdef _KERNEL
152 void savecontext(ucontext_t *, const k_sigset_t *);
153 void restorecontext(ucontext_t *);
154
155 #ifdef _SYSCALL32
156 extern void savecontext32(ucontext32_t *, const k_sigset_t *);
157 #endif
158 #endif
159
160 #ifdef __cplusplus
161 }
162 #endif
163
164 #endif /* _SYS_UCONTEXT_H */