ptrace_machdep.c revision 146959 
1/*-
2 * Copyright (c) 2005 Doug Rabson
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: head/sys/i386/i386/ptrace_machdep.c 146959 2005-06-04 15:36:48Z dfr $");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/proc.h>
34#include <sys/ptrace.h>
35#include <machine/md_var.h>
36#include <machine/pcb.h>
37
38#if !defined(CPU_ENABLE_SSE) && defined(I686_CPU)
39#define CPU_ENABLE_SSE
40#endif
41#if defined(CPU_DISABLE_SSE)
42#undef CPU_ENABLE_SSE
43#endif
44
45int
46cpu_ptrace(struct thread *td, int req, void *addr, int data)
47{
48#ifdef CPU_ENABLE_SSE
49	int error;
50
51	if (!cpu_fxsr)
52		return (EINVAL);
53
54	switch (req) {
55	case PT_GETXMMREGS:
56		error = copyout(&td->td_pcb->pcb_save.sv_xmm, addr,
57		    sizeof(td->td_pcb->pcb_save.sv_xmm));
58		break;
59
60	case PT_SETXMMREGS:
61		error = copyin(addr, &td->td_pcb->pcb_save.sv_xmm,
62		    sizeof(td->td_pcb->pcb_save.sv_xmm));
63		break;
64
65	default:
66		return (EINVAL);
67	}
68
69	return (error);
70#else
71	return (EINVAL);
72#endif
73}
74