2 * Copyright (C) 2003 David Xu <davidxu@freebsd.org>
3 * Copyright (c) 2001,2003 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 * $DragonFly: src/lib/libthread_xu/arch/i386/i386/pthread_md.c,v 1.5 2005/03/28 03:33:14 dillon Exp $
30 #include <sys/types.h>
35 #include "pthread_md.h"
38 _tcb_ctor(struct pthread *thread, int initial)
49 * We may have to replace a TLS already created by the low
50 * level libc startup code
53 if (sys_get_tls_area(0, &info, sizeof(info)) == 0) {
55 flags = RTLD_ALLOC_TLS_FREE_OLD;
58 tcb = _rtld_allocate_tls(old_tcb, sizeof(struct tcb), flags);
60 tcb->tcb_thread = thread;
67 _tcb_set(struct tcb *tcb)
73 info.size = sizeof(*tcb);
74 seg = tcb->tcb_seg = sys_set_tls_area(0, &info, sizeof(info));
75 __asm __volatile("movl %0, %%gs" : : "r" (seg));
79 _tcb_dtor(struct tcb *tcb)
81 _rtld_free_tls(tcb, sizeof(struct tcb));