1/* 2 * Copyright (c) 2012 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29#ifndef OS_TSD_H 30#define OS_TSD_H 31 32#include <stdint.h> 33 34/* The low nine slots of the TSD are reserved for libsyscall usage. */ 35#define __TSD_RESERVED_BASE 0 36#define __TSD_RESERVED_MAX 9 37 38#define __TSD_THREAD_SELF 0 39#define __TSD_ERRNO 1 40#define __TSD_MIG_REPLY 2 41#define __TSD_SEMAPHORE_CACHE 9 42 43 44__attribute__((always_inline)) 45static __inline__ unsigned int 46_os_cpu_number(void) 47{ 48 /* Not yet implemented */ 49 return 0; 50} 51 52__attribute__((always_inline)) 53static __inline__ void* 54_os_tsd_get_direct(unsigned long slot) 55{ 56 void *ret; 57#if defined(__i386__) || defined(__x86_64__) 58 __asm__("mov %%gs:%1, %0" : "=r" (ret) : "m" (*(void **)(slot * sizeof(void *)))); 59#endif 60 61 62 return ret; 63} 64 65__attribute__((always_inline)) 66static __inline__ int 67_os_tsd_set_direct(unsigned long slot, void* val) 68{ 69#if defined(__i386__) && defined(__PIC__) 70 __asm__("movl %1, %%gs:%0" : "=m" (*(void **)(slot * sizeof(void *))) : "rn" (val)); 71#elif defined(__i386__) && !defined(__PIC__) 72 __asm__("movl %1, %%gs:%0" : "=m" (*(void **)(slot * sizeof(void *))) : "ri" (val)); 73#elif defined(__x86_64__) 74 __asm__("movq %1, %%gs:%0" : "=m" (*(void **)(slot * sizeof(void *))) : "rn" (val)); 75#endif 76 77 return 0; 78} 79 80#endif 81