1 /*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * from: @(#)sys_machdep.c 5.5 (Berkeley) 1/19/91
34 * $FreeBSD: releng/5.1/sys/amd64/amd64/sys_machdep.c 114928 2003-05-12 02:37:29Z peter $
35 *
36 */
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/lock.h>
41 #include <sys/proc.h>
42 #include <sys/sysproto.h>
43 #include <machine/specialreg.h>
44 #include <machine/sysarch.h>
45 #include <machine/pcb.h>
46
47 #ifndef _SYS_SYSPROTO_H_
48 struct sysarch_args {
49 int op;
50 char *parms;
51 };
52 #endif
53
54 int
55 sysarch(td, uap)
56 struct thread *td;
57 register struct sysarch_args *uap;
58 {
59 int error = 0;
60 struct pcb *pcb = curthread->td_pcb;
61
62 switch(uap->op) {
63 case AMD64_GET_FSBASE:
64 error = copyout(&pcb->pcb_fsbase, uap->parms, sizeof(pcb->pcb_fsbase));
65 break;
66
67 case AMD64_SET_FSBASE:
68 error = copyin(uap->parms, &pcb->pcb_fsbase, sizeof(pcb->pcb_fsbase));
69 if (!error)
70 wrmsr(MSR_FSBASE, pcb->pcb_fsbase);
71 break;
72
73 case AMD64_GET_GSBASE:
74 error = copyout(&pcb->pcb_gsbase, uap->parms, sizeof(pcb->pcb_gsbase));
75 break;
76
77 case AMD64_SET_GSBASE:
78 error = copyin(uap->parms, &pcb->pcb_gsbase, sizeof(pcb->pcb_gsbase));
79 if (!error)
80 wrmsr(MSR_KGSBASE, pcb->pcb_fsbase);
81 break;
82
83 default:
84 error = EINVAL;
85 break;
86 }
87 return (error);
88 }
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