ucontext.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_UCONTEXT_H
#define _SYS_UCONTEXT_H
#pragma ident "%Z%%M% %I% %E% SMI" /* from SVr4.0 1.10 */
#include <sys/feature_tests.h>
#include <sys/types.h>
#include <sys/regset.h>
#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
#include <sys/signal.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* Inclusion of <sys/signal.h> for sigset_t and stack_t definitions
* breaks XPG4v2 namespace. Therefore we must duplicate the defines
* for these types here when _XPG4_2 is defined.
*/
#if defined(_XPG4_2) && !defined(__EXTENSIONS__)
#ifndef _SIGSET_T
#define _SIGSET_T
typedef struct { /* signal set type */
unsigned int __sigbits[4];
} sigset_t;
#endif /* _SIGSET_T */
#ifndef _STACK_T
#define _STACK_T
typedef struct {
void *ss_sp;
size_t ss_size;
int ss_flags;
} stack_t;
#endif /* _STACK_T */
#endif /* defined(_XPG4_2) && !defined(__EXTENSIONS__) */
#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
typedef struct ucontext ucontext_t;
#else
typedef struct __ucontext ucontext_t;
#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
struct ucontext {
#else
struct __ucontext {
#endif
uint_t uc_flags;
ucontext_t *uc_link;
sigset_t uc_sigmask;
stack_t uc_stack;
mcontext_t uc_mcontext;
#ifdef __sparcv9
long uc_filler[4];
#else /* __sparcv9 */
long uc_filler[23];
#endif /* __sparcv9 */
};
#ifdef _SYSCALL32
/* Kernel view of user ILP32 ucontext structure */
typedef struct ucontext32 {
uint32_t uc_flags;
caddr32_t uc_link;
sigset32_t uc_sigmask;
stack32_t uc_stack;
mcontext32_t uc_mcontext;
int32_t uc_filler[23];
} ucontext32_t;
#ifdef _KERNEL
extern void ucontext_32ton(const ucontext32_t *, ucontext_t *,
const struct fq32 *, struct fq *);
extern void fpuregset_nto32(const fpregset_t *, fpregset32_t *, struct fq32 *);
#endif
#endif /* _SYSCALL32 */
#if !defined(_XPG4_2) || defined(__EXTENSIONS__)
#define GETCONTEXT 0
#define SETCONTEXT 1
#define GETUSTACK 2
#define SETUSTACK 3
/*
* values for uc_flags
* these are implementation dependent flags, that should be hidden
* from the user interface, defining which elements of ucontext
* are valid, and should be restored on call to setcontext
*/
#define UC_SIGMASK 0x01
#define UC_STACK 0x02
#define UC_CPU 0x04
#define UC_MAU 0x08
#define UC_FPU UC_MAU
#define UC_INTR 0x10
#define UC_ASR 0x20
#define UC_MCONTEXT (UC_CPU|UC_FPU|UC_ASR)
/*
* UC_ALL specifies the default context
*/
#define UC_ALL (UC_SIGMASK|UC_STACK|UC_MCONTEXT)
#endif /* !defined(_XPG4_2) || defined(__EXTENSIONS__) */
#ifdef _KERNEL
extern void savecontext(ucontext_t *, k_sigset_t);
extern void restorecontext(ucontext_t *);
#ifdef _SYSCALL32
extern void savecontext32(ucontext32_t *, k_sigset_t, struct fq32 *);
#endif
#endif
#ifdef __cplusplus
}
#endif
#endif /* _SYS_UCONTEXT_H */