1/*-
2 * Copyright (c) 2003 Marcel Moolenaar
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/proc.h>
33#include <sys/ptrace.h>
34#include <machine/frame.h>
35
36int
37cpu_ptrace(struct thread *td, int req, void *addr, int data)
38{
39	struct trapframe *tf;
40	uint64_t *kstack;
41	int error;
42
43	error = EINVAL;
44	tf = td->td_frame;
45
46	switch (req) {
47	case PT_GETKSTACK:
48		if (data >= 0 && data < (tf->tf_special.ndirty >> 3)) {
49			kstack = (uint64_t*)(td->td_kstack +
50			    (tf->tf_special.bspstore & 0x1ffUL));
51			error = copyout(kstack + data, addr, 8);
52		}
53		break;
54	case PT_SETKSTACK:
55		if (data >= 0 && data < (tf->tf_special.ndirty >> 3)) {
56			kstack = (uint64_t*)(td->td_kstack +
57			    (tf->tf_special.bspstore & 0x1ffUL));
58			error = copyin(addr, kstack + data, 8);
59		}
60		break;
61	}
62
63	return (error);
64}
65