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 1.2 2005/03/15 11:26:34 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>
39 #include <machine/sysarch.h>
41 #define DTV_OFFSET offsetof(struct tcb, tcb_dtv)
46 * Variant II tcb, %fs points to the struct.
50 struct tcb *tcb_self; /* required by rtld */
51 void *tcb_dtv; /* required by rtld */
52 struct pthread *tcb_thread;
53 void *tcb_spare[1]; /* align tcb_tmbx to 16 bytes */
57 * Evaluates to the byte offset of the per-tcb variable name.
59 #define __tcb_offset(name) __offsetof(struct tcb, name)
62 * Evaluates to the type of the per-tcb variable name.
64 #define __tcb_type(name) __typeof(((struct tcb *)0)->name)
67 * Evaluates to the value of the per-tcb variable name.
69 #define TCB_GET64(name) ({ \
70 __tcb_type(name) __result; \
73 __asm __volatile("movq %%fs:%1, %0" \
75 : "m" (*(u_long *)(__tcb_offset(name)))); \
76 __result = (__tcb_type(name))__i; \
84 struct tcb *_tcb_ctor(struct pthread *, int);
85 void _tcb_dtor(struct tcb *tcb);
87 /* Called from the KSE to set its private data. */
89 _tcb_set(struct tcb *tcb)
91 amd64_set_fsbase(tcb);
94 /* Get the current kcb. */
95 static __inline struct tcb *
98 return (TCB_GET64(tcb_self));
101 extern struct pthread *_thr_initial;
103 /* Get the current thread. */
104 static __inline struct pthread *
108 return (TCB_GET64(tcb_thread));