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 _XPG4_2 is defined. 51 */ 52 53 #if defined(_XPG4_2) && !defined(__EXTENSIONS__) 54 #ifndef _SIGSET_T 55 #define _SIGSET_T 56 typedef struct { /* signal set type */ 57 unsigned long __sigbits[4]; 58 } sigset_t; 59 #endif /* _SIGSET_T */ 60 61 #ifndef _STACK_T 62 #define _STACK_T 63 typedef struct { 64 void *ss_sp; 65 size_t ss_size; 66 int ss_flags; 67 } stack_t; 68 #endif /* _STACK_T */ 69 #endif /* defined(_XPG4_2) && !defined(__EXTENSIONS__) */ 70 71 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 72 typedef struct ucontext ucontext_t; 73 #else 74 typedef struct __ucontext ucontext_t; 75 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 76 77 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 78 struct ucontext { 79 #else 80 struct __ucontext { 81 #endif 82 unsigned long uc_flags; 83 ucontext_t *uc_link; 84 sigset_t uc_sigmask; 85 stack_t uc_stack; 86 mcontext_t uc_mcontext; 87 long uc_filler[5]; /* see ABI spec for Intel386 */ 88 }; 89 90 #if defined(_SYSCALL32) 91 92 /* Kernel view of user ILP32 ucontext structure */ 93 94 typedef struct ucontext32 { 95 uint32_t uc_flags; 96 caddr32_t uc_link; 97 sigset_t uc_sigmask; 98 stack32_t uc_stack; 99 mcontext32_t uc_mcontext; 100 int32_t uc_filler[5]; 101 } ucontext32_t; 102 103 #if defined(_KERNEL) 104 extern void ucontext_nto32(const ucontext_t *src, ucontext32_t *dest); 105 extern void ucontext_32ton(const ucontext32_t *src, ucontext_t *dest); 106 #endif 107 108 #endif /* _SYSCALL32 */ 109 110 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 111 #define GETCONTEXT 0 112 #define SETCONTEXT 1 113 #define GETUSTACK 2 114 #define SETUSTACK 3 115 116 /* 117 * values for uc_flags 118 * these are implementation dependent flags, that should be hidden 119 * from the user interface, defining which elements of ucontext 120 * are valid, and should be restored on call to setcontext 121 */ 122 123 #define UC_SIGMASK 0x01 124 #define UC_STACK 0x02 125 #define UC_CPU 0x04 126 #define UC_MAU 0x08 127 #define UC_FPU UC_MAU 128 129 #define UC_MCONTEXT (UC_CPU|UC_FPU) 130 131 /* 132 * UC_ALL specifies the default context 133 */ 134 135 #define UC_ALL (UC_SIGMASK|UC_STACK|UC_MCONTEXT) 136 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 137 138 #ifdef _KERNEL 139 void savecontext(ucontext_t *, const k_sigset_t *); 140 void restorecontext(ucontext_t *); 141 142 #ifdef _SYSCALL32 143 extern void savecontext32(ucontext32_t *, const k_sigset_t *); 144 #endif 145 #endif 146 147 #ifdef __cplusplus 148 } 149 #endif 150 151 #endif /* _SYS_UCONTEXT_H */ 152