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 * Copyright 2014 Nexenta Systems, Inc. All rights reserved. 26 */ 27 28 #ifndef _ASM_THREAD_H 29 #define _ASM_THREAD_H 30 31 #include <sys/ccompile.h> 32 #include <sys/types.h> 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 #if !defined(__lint) && defined(__GNUC__) 39 40 struct _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 49 extern __GNU_INLINE struct _kthread 50 *threadp(void) 51 { 52 struct _kthread *__value; 53 54 #if defined(__amd64) 55 __asm__ __volatile__( 56 "movq %%gs:0x18,%0" /* CPU_THREAD */ 57 : "=r" (__value)); 58 #elif defined(__i386) 59 __asm__ __volatile__( 60 "movl %%gs:0x10,%0" /* CPU_THREAD */ 61 : "=r" (__value)); 62 #else 63 #error "port me" 64 #endif 65 return (__value); 66 } 67 68 #endif /* !__lint && __GNUC__ */ 69 70 #ifdef __cplusplus 71 } 72 #endif 73 74 #endif /* _ASM_THREAD_H */ 75