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 int __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 67 #endif /* _STACK_T */ 68 #endif /* defined(_XPG4_2) && !defined(__EXTENSIONS__) */ 69 70 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 71 typedef struct ucontext ucontext_t; 72 #else 73 typedef struct __ucontext ucontext_t; 74 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 75 76 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 77 struct ucontext { 78 #else 79 struct __ucontext { 80 #endif 81 uint_t uc_flags; 82 ucontext_t *uc_link; 83 sigset_t uc_sigmask; 84 stack_t uc_stack; 85 mcontext_t uc_mcontext; 86 #ifdef __sparcv9 87 long uc_filler[4]; 88 #else /* __sparcv9 */ 89 long uc_filler[23]; 90 #endif /* __sparcv9 */ 91 }; 92 93 #ifdef _SYSCALL32 94 95 /* Kernel view of user ILP32 ucontext structure */ 96 97 typedef struct ucontext32 { 98 uint32_t uc_flags; 99 caddr32_t uc_link; 100 sigset_t uc_sigmask; 101 stack32_t uc_stack; 102 mcontext32_t uc_mcontext; 103 int32_t uc_filler[23]; 104 } ucontext32_t; 105 106 #ifdef _KERNEL 107 extern void ucontext_32ton(const ucontext32_t *, ucontext_t *, 108 const struct fq32 *, struct fq *); 109 extern void fpuregset_nto32(const fpregset_t *, fpregset32_t *, struct fq32 *); 110 #endif 111 112 #endif /* _SYSCALL32 */ 113 114 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 115 #define GETCONTEXT 0 116 #define SETCONTEXT 1 117 #define GETUSTACK 2 118 #define SETUSTACK 3 119 120 /* 121 * values for uc_flags 122 * these are implementation dependent flags, that should be hidden 123 * from the user interface, defining which elements of ucontext 124 * are valid, and should be restored on call to setcontext 125 */ 126 127 #define UC_SIGMASK 0x01 128 #define UC_STACK 0x02 129 #define UC_CPU 0x04 130 #define UC_MAU 0x08 131 #define UC_FPU UC_MAU 132 #define UC_INTR 0x10 133 #define UC_ASR 0x20 134 135 #define UC_MCONTEXT (UC_CPU|UC_FPU|UC_ASR) 136 137 /* 138 * UC_ALL specifies the default context 139 */ 140 141 #define UC_ALL (UC_SIGMASK|UC_STACK|UC_MCONTEXT) 142 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 143 144 #ifdef _KERNEL 145 extern void savecontext(ucontext_t *, const k_sigset_t *); 146 extern void restorecontext(ucontext_t *); 147 148 #ifdef _SYSCALL32 149 extern void savecontext32(ucontext32_t *, const k_sigset_t *, struct fq32 *); 150 #endif 151 #endif 152 153 #ifdef __cplusplus 154 } 155 #endif 156 157 #endif /* _SYS_UCONTEXT_H */ 158