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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 #ifndef _SYS_UCONTEXT_H 32 #define _SYS_UCONTEXT_H 33 34 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 #include <sys/feature_tests.h> 37 38 #include <sys/types.h> 39 #include <sys/regset.h> 40 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 41 #include <sys/signal.h> 42 #endif 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 /* 49 * Inclusion of <sys/signal.h> for sigset_t and stack_t definitions 50 * breaks XPG4v2 namespace. Therefore we must duplicate the defines 51 * for these types here when _XPG4_2 is defined. 52 */ 53 54 #if defined(_XPG4_2) && !defined(__EXTENSIONS__) 55 #ifndef _SIGSET_T 56 #define _SIGSET_T 57 typedef struct { /* signal set type */ 58 unsigned long __sigbits[4]; 59 } sigset_t; 60 #endif /* _SIGSET_T */ 61 62 #ifndef _STACK_T 63 #define _STACK_T 64 typedef struct { 65 void *ss_sp; 66 size_t ss_size; 67 int ss_flags; 68 } stack_t; 69 #endif /* _STACK_T */ 70 #endif /* defined(_XPG4_2) && !defined(__EXTENSIONS__) */ 71 72 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 73 typedef struct ucontext ucontext_t; 74 #else 75 typedef struct __ucontext ucontext_t; 76 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 77 78 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 79 struct ucontext { 80 #else 81 struct __ucontext { 82 #endif 83 unsigned long uc_flags; 84 ucontext_t *uc_link; 85 sigset_t uc_sigmask; 86 stack_t uc_stack; 87 mcontext_t uc_mcontext; 88 long uc_filler[5]; /* see ABI spec for Intel386 */ 89 }; 90 91 #if defined(_SYSCALL32) 92 93 /* Kernel view of user ILP32 ucontext structure */ 94 95 typedef struct ucontext32 { 96 uint32_t uc_flags; 97 caddr32_t uc_link; 98 sigset32_t uc_sigmask; 99 stack32_t uc_stack; 100 mcontext32_t uc_mcontext; 101 int32_t uc_filler[5]; 102 } ucontext32_t; 103 104 #if defined(_KERNEL) 105 extern void ucontext_nto32(const ucontext_t *src, ucontext32_t *dest); 106 extern void ucontext_32ton(const ucontext32_t *src, ucontext_t *dest); 107 #endif 108 109 #endif /* _SYSCALL32 */ 110 111 #if !defined(_XPG4_2) || defined(__EXTENSIONS__) 112 #define GETCONTEXT 0 113 #define SETCONTEXT 1 114 #define GETUSTACK 2 115 #define SETUSTACK 3 116 117 /* 118 * values for uc_flags 119 * these are implementation dependent flags, that should be hidden 120 * from the user interface, defining which elements of ucontext 121 * are valid, and should be restored on call to setcontext 122 */ 123 124 #define UC_SIGMASK 0x01 125 #define UC_STACK 0x02 126 #define UC_CPU 0x04 127 #define UC_MAU 0x08 128 #define UC_FPU UC_MAU 129 130 #define UC_MCONTEXT (UC_CPU|UC_FPU) 131 132 /* 133 * UC_ALL specifies the default context 134 */ 135 136 #define UC_ALL (UC_SIGMASK|UC_STACK|UC_MCONTEXT) 137 #endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 138 139 #ifdef _KERNEL 140 void savecontext(ucontext_t *, k_sigset_t); 141 void restorecontext(ucontext_t *); 142 143 #ifdef _SYSCALL32 144 extern void savecontext32(ucontext32_t *ucp, k_sigset_t mask); 145 #endif 146 #endif 147 148 #ifdef __cplusplus 149 } 150 #endif 151 152 #endif /* _SYS_UCONTEXT_H */ 153