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