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: releng/6.2/sys/i386/i386/ptrace_machdep.c 160058 2006-07-01 00:57:56Z davidxu $");
30
31 #include "opt_cpu.h"
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/proc.h>
36 #include <sys/ptrace.h>
37 #include <machine/md_var.h>
38 #include <machine/pcb.h>
39
40 #if !defined(CPU_DISABLE_SSE) && defined(I686_CPU)
41 #define CPU_ENABLE_SSE
42 #endif
43
44 int
45 cpu_ptrace(struct thread *td, int req, void *addr, int data)
46 {
47 #ifdef CPU_ENABLE_SSE
48 struct savexmm *fpstate;
49 int error;
50
51 if (!cpu_fxsr)
52 return (EINVAL);
53
54 fpstate = &td->td_pcb->pcb_save.sv_xmm;
55 switch (req) {
56 case PT_GETXMMREGS:
57 error = copyout(fpstate, addr, sizeof(*fpstate));
58 break;
59
60 case PT_SETXMMREGS:
61 error = copyin(addr, fpstate, sizeof(*fpstate));
62 fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask;
63 break;
64
65 default:
66 return (EINVAL);
67 }
68
69 return (error);
70 #else
71 return (EINVAL);
72 #endif
73 }
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