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 #include <sys/ccompile.h> 31 #include <sys/types.h> 32 33 #ifdef __cplusplus 34 extern "C" { 35 #endif 36 37 #if !defined(__lint) && defined(__GNUC__) 38 39 struct _kthread; 40 41 /* 42 * 0x10 is offsetof(struct cpu, cpu_thread) 43 * 0x18 is the same thing for the _LP64 version. 44 * (It's also the value of CPU_THREAD in assym.h) 45 * Yuck. 46 */ 47 48 extern __GNU_INLINE struct _kthread 49 *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