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 44 extern "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 we did not include <sys/signal.h> OR 51 * when <sys/signal.h> would not have declared them. 52 */ 53 54 /* Need sigset_t for ucontext below */ 55 #ifndef _SIGSET_T 56 #define _SIGSET_T 57 typedef struct { /* signal set type */ 58 unsigned int __sigbits[4]; 59 } sigset_t; 60 #endif /* _SIGSET_T */ 61 62 /* Need stack_t for ucontext below */ 63 #ifndef _STACK_T 64 #define _STACK_T 65 typedef struct { 66 void *ss_sp; 67 size_t ss_size; 68 int ss_flags; 69 } stack_t; 70 71 #endif /* _STACK_T */ 72 73 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 74 typedef struct ucontext ucontext_t; 75 #else 76 typedef struct __ucontext ucontext_t; 77 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 78 79 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 80 struct ucontext { 81 #else 82 struct __ucontext { 83 #endif 84 uint_t uc_flags; 85 ucontext_t *uc_link; 86 sigset_t uc_sigmask; 87 stack_t uc_stack; 88 mcontext_t uc_mcontext; 89 #ifdef __sparcv9 90 long uc_filler[4]; 91 #else /* __sparcv9 */ 92 long uc_filler[23]; 93 #endif /* __sparcv9 */ 94 }; 95 96 #ifdef _SYSCALL32 97 98 /* Kernel view of user ILP32 ucontext structure */ 99 100 typedef struct ucontext32 { 101 uint32_t uc_flags; 102 caddr32_t uc_link; 103 sigset_t uc_sigmask; 104 stack32_t uc_stack; 105 mcontext32_t uc_mcontext; 106 int32_t uc_filler[23]; 107 } ucontext32_t; 108 109 #ifdef _KERNEL 110 extern void ucontext_32ton(const ucontext32_t *, ucontext_t *, 111 const struct fq32 *, struct _fq *); 112 extern void fpuregset_nto32(const fpregset_t *, fpregset32_t *, struct fq32 *); 113 #endif 114 115 #endif /* _SYSCALL32 */ 116 117 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 118 #define GETCONTEXT 0 119 #define SETCONTEXT 1 120 #define GETUSTACK 2 121 #define SETUSTACK 3 122 123 /* 124 * values for uc_flags 125 * these are implementation dependent flags, that should be hidden 126 * from the user interface, defining which elements of ucontext 127 * are valid, and should be restored on call to setcontext 128 */ 129 130 #define UC_SIGMASK 0x01 131 #define UC_STACK 0x02 132 #define UC_CPU 0x04 133 #define UC_MAU 0x08 134 #define UC_FPU UC_MAU 135 #define UC_INTR 0x10 136 #define UC_ASR 0x20 137 138 #define UC_MCONTEXT (UC_CPU|UC_FPU|UC_ASR) 139 140 /* 141 * UC_ALL specifies the default context 142 */ 143 144 #define UC_ALL (UC_SIGMASK|UC_STACK|UC_MCONTEXT) 145 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 146 147 #ifdef _KERNEL 148 extern void savecontext(ucontext_t *, const k_sigset_t *); 149 extern void restorecontext(ucontext_t *); 150 151 #ifdef _SYSCALL32 152 extern void savecontext32(ucontext32_t *, const k_sigset_t *, struct fq32 *); 153 #endif 154 #endif 155 156 #ifdef __cplusplus 157 } 158 #endif 159 160 #endif /* _SYS_UCONTEXT_H */ 161