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 */ 150