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/* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#ifndef _ASM_THREAD_H 28#define _ASM_THREAD_H 29 30#pragma ident "%Z%%M% %I% %E% SMI" 31 32#include <sys/types.h> 33 34#ifdef __cplusplus 35extern "C" { 36#endif 37 38#if !defined(__lint) && defined(__GNUC__) 39 40struct _kthread; 41 42/* 43 * 0x10 is offsetof(struct cpu, cpu_thread) 44 * 0x18 is the same thing for the _LP64 version. 45 * (It's also the value of CPU_THREAD in assym.h) 46 * Yuck. 47 */ 48 49extern __inline__ struct _kthread *threadp(void) 50{ 51 void *__value; 52 53#if defined(__amd64) 54 __asm__ __volatile__( 55 "movq %%gs:0x18,%0" /* CPU_THREAD */ 56 : "=r" (__value)); 57#elif defined(__i386) 58 __asm__ __volatile__( 59 "movl %%gs:0x10,%0" /* CPU_THREAD */ 60 : "=r" (__value)); 61#else 62#error "port me" 63#endif 64 return (__value); 65} 66 67#endif /* !__lint && __GNUC__ */ 68 69#ifdef __cplusplus 70} 71#endif 72 73#endif /* _ASM_THREAD_H */ 74