1/*-
2 * Copyright (C) 2003 David Xu <davidxu@freebsd.org>
3 * Copyright (c) 2001,2003 Daniel Eischen <deischen@freebsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
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.
14 *
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
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD$");
30
31#include <sys/types.h>
32#include <machine/cpufunc.h>
33#include <machine/sysarch.h>
34
35#include <unistd.h>
36#include <signal.h>
37#include <stdlib.h>
38#include <string.h>
39#include <ucontext.h>
40
41#include "rtld_tls.h"
42#include "pthread_md.h"
43
44struct tcb *
45_tcb_ctor(struct pthread *thread, int initial)
46{
47	struct tcb *tcb;
48	void *oldtls;
49
50	if (initial) {
51		__asm __volatile("movl %%gs:0, %0" : "=r" (oldtls));
52	} else {
53		oldtls = NULL;
54	}
55
56	tcb = _rtld_allocate_tls(oldtls, sizeof(struct tcb), 16);
57	if (tcb) {
58		tcb->tcb_thread = thread;
59		tcb->tcb_spare = 0;
60		bzero(&tcb->tcb_tmbx, sizeof(tcb->tcb_tmbx));
61	}
62
63	return (tcb);
64}
65
66void
67_tcb_dtor(struct tcb *tcb)
68{
69	_rtld_free_tls(tcb, sizeof(struct tcb), 16);
70}
71
72/*
73 * Initialize KSD.  This also includes setting up the LDT.
74 */
75struct kcb *
76_kcb_ctor(struct kse *kse)
77{
78	struct kcb *kcb;
79
80	kcb = malloc(sizeof(struct kcb));
81	if (kcb != NULL) {
82		bzero(kcb, sizeof(struct kcb));
83		kcb->kcb_self = kcb;
84		kcb->kcb_kse = kse;
85	}
86	return (kcb);
87}
88
89void
90_kcb_dtor(struct kcb *kcb)
91{
92	free(kcb);
93}
94
95int
96i386_set_gsbase(void *addr)
97{
98
99	return (sysarch(I386_SET_GSBASE, &addr));
100}
101