1/*-
2 * Copyright (c) 2014 Justin Hibbits
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("$FreeBSD$");
30
31#include "opt_compat.h"
32
33#include <sys/param.h>
34#include <sys/systm.h>
35#include <sys/malloc.h>
36#include <sys/proc.h>
37#include <sys/ptrace.h>
38#include <sys/sysent.h>
39#include <machine/altivec.h>
40#include <machine/cpu.h>
41#include <machine/md_var.h>
42#include <machine/pcb.h>
43
44int
45cpu_ptrace(struct thread *td, int req, void *addr, int data)
46{
47	int error;
48	struct pcb *pcb;
49	struct vec vec;
50
51	pcb = td->td_pcb;
52
53	bzero(&vec, sizeof(vec));
54
55	error = EINVAL;
56	switch (req) {
57	case PT_GETVRREGS:
58		if (!(cpu_features & PPC_FEATURE_HAS_ALTIVEC))
59			break;
60
61		if (pcb->pcb_flags & PCB_VEC) {
62			save_vec_nodrop(td);
63			memcpy(&vec, &pcb->pcb_vec, sizeof(vec));
64		}
65		error = copyout(&vec, addr, sizeof(vec));
66		break;
67	case PT_SETVRREGS:
68		if (!(cpu_features & PPC_FEATURE_HAS_ALTIVEC))
69			break;
70		error = copyin(addr, &vec, sizeof(vec));
71		if (error == 0) {
72			pcb->pcb_flags |= PCB_VEC;
73			memcpy(&pcb->pcb_vec, &vec, sizeof(vec));
74		}
75		break;
76
77	default:
78		break;
79	}
80
81	return (error);
82}
83