thread.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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _ASM_THREAD_H
#define _ASM_THREAD_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(__lint) && defined(__GNUC__)
struct _kthread;
/*
* 0x10 is offsetof(struct cpu, cpu_thread)
* 0x18 is the same thing for the _LP64 version.
* (It's also the value of CPU_THREAD in assym.h)
* Yuck.
*/
extern __inline__ struct _kthread *threadp(void)
{
void *__value;
#if defined(__amd64)
__asm__ __volatile__(
"movq %%gs:0x18,%0" /* CPU_THREAD */
: "=r" (__value));
#elif defined(__i386)
__asm__ __volatile__(
"movl %%gs:0x10,%0" /* CPU_THREAD */
: "=r" (__value));
#else
#error "port me"
#endif
return (__value);
}
#endif /* !__lint && __GNUC__ */
#ifdef __cplusplus
}
#endif
#endif /* _ASM_THREAD_H */