2 * Copyright (C) 2003 David Xu <davidxu@freebsd.org>
3 * Copyright (c) 2001 Daniel Eischen <deischen@freebsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Neither the name of the author nor the names of its contributors
12 * may be used to endorse or promote products derived from this software
13 * without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/lib/libpthread/arch/amd64/include/pthread_md.h,v 1.10 2004/08/25 23:42:40 davidxu Exp $
28 * $DragonFly: src/lib/libthread_xu/arch/amd64/include/pthread_md.h,v 1.1 2005/02/01 12:38:27 davidxu Exp $
32 * Machine-dependent thread prototypes/definitions for the thread kernel.
34 #ifndef _PTHREAD_MD_H_
35 #define _PTHREAD_MD_H_
38 #include <sys/types.h>
40 #include <machine/sysarch.h>
43 #define DTV_OFFSET offsetof(struct tcb, tcb_dtv)
49 * %fs points to a struct tcb.
53 struct tcb *tcb_self; /* required by rtld */
54 void *tcb_dtv; /* required by rtld */
55 struct pthread *tcb_thread;
56 void *tcb_spare[1]; /* align tcb_tmbx to 16 bytes */
60 * Evaluates to the byte offset of the per-kse variable name.
62 #define __tcb_offset(name) __offsetof(struct tcb, name)
65 * Evaluates to the type of the per-kse variable name.
67 #define __tcb_type(name) __typeof(((struct tcb *)0)->name)
70 * Evaluates to the value of the per-kse variable name.
72 #define TCB_GET64(name) ({ \
73 __tcb_type(name) __result; \
76 __asm __volatile("movq %%fs:%1, %0" \
78 : "m" (*(u_long *)(__tcb_offset(name)))); \
79 __result = (__tcb_type(name))__i; \
87 struct tcb *_tcb_ctor(struct pthread *, int);
88 void _tcb_dtor(struct tcb *tcb);
90 /* Called from the KSE to set its private data. */
92 _tcb_set(struct tcb *tcb)
94 amd64_set_fsbase(tcb);
97 /* Get the current kcb. */
98 static __inline struct tcb *
101 return (TCB_GET64(tcb_self));
104 extern struct pthread *_thr_initial;
106 /* Get the current thread. */
107 static __inline struct pthread *
111 return (TCB_GET64(tcb_thread));