1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (C) 2003 David Xu <[email protected]>
5 * Copyright (c) 2001 Daniel Eischen <[email protected]>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Neither the name of the author nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 /*
31 * Machine-dependent thread prototypes/definitions.
32 */
33 #ifndef _PTHREAD_MD_H_
34 #define _PTHREAD_MD_H_
35
36 #include <stddef.h>
37 #include <sys/types.h>
38 #include <machine/tls.h>
39
40 #define CPU_SPINWAIT __asm __volatile("pause")
41
42 /* For use in _Static_assert to check structs will fit in a page */
43 #define THR_PAGE_SIZE_MIN PAGE_SIZE
44
45 static __inline struct pthread *
_get_curthread(void)46 _get_curthread(void)
47 {
48 struct pthread *thr;
49
50 __asm __volatile("movq %%fs:%1, %0" : "=r" (thr)
51 : "m" (*(volatile u_long *)offsetof(struct tcb, tcb_thread)));
52 return (thr);
53 }
54
55 #define HAS__UMTX_OP_ERR 1
56
57 static __inline void
_thr_resolve_machdep(void)58 _thr_resolve_machdep(void)
59 {
60 }
61
62 #endif
63