ucontext.h revision 11913:283e725df792
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 42extern "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 54typedef 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 61typedef 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__) 70typedef struct ucontext ucontext_t; 71#else 72typedef struct __ucontext ucontext_t; 73#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */ 74 75#if !defined(_XPG4_2) || defined(__EXTENSIONS__) 76struct ucontext { 77#else 78struct __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 92typedef 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) 102extern void ucontext_nto32(const ucontext_t *src, ucontext32_t *dest); 103extern 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 137void savecontext(ucontext_t *, const k_sigset_t *); 138void restorecontext(ucontext_t *); 139 140#ifdef _SYSCALL32 141extern 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