1139790Simp/*-
2118933Smarcel * Copyright (c) 2003 Marcel Moolenaar
3118933Smarcel * All rights reserved.
4118933Smarcel *
5118933Smarcel * Redistribution and use in source and binary forms, with or without
6118933Smarcel * modification, are permitted provided that the following conditions
7118933Smarcel * are met:
8118933Smarcel *
9118933Smarcel * 1. Redistributions of source code must retain the above copyright
10118933Smarcel *    notice, this list of conditions and the following disclaimer.
11118933Smarcel * 2. Redistributions in binary form must reproduce the above copyright
12118933Smarcel *    notice, this list of conditions and the following disclaimer in the
13118933Smarcel *    documentation and/or other materials provided with the distribution.
14118933Smarcel *
15118933Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16118933Smarcel * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17118933Smarcel * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18118933Smarcel * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19118933Smarcel * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20118933Smarcel * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21118933Smarcel * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22118933Smarcel * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23118933Smarcel * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24118933Smarcel * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25118933Smarcel */
26118933Smarcel
27118933Smarcel#include <sys/cdefs.h>
28118933Smarcel__FBSDID("$FreeBSD$");
29118933Smarcel
30118933Smarcel#include <sys/param.h>
31118933Smarcel#include <sys/systm.h>
32118933Smarcel#include <sys/proc.h>
33118933Smarcel#include <sys/ptrace.h>
34118933Smarcel#include <machine/frame.h>
35118933Smarcel
36118933Smarcelint
37118933Smarcelcpu_ptrace(struct thread *td, int req, void *addr, int data)
38118933Smarcel{
39118933Smarcel	struct trapframe *tf;
40118933Smarcel	uint64_t *kstack;
41118933Smarcel	int error;
42118933Smarcel
43118981Smarcel	error = EINVAL;
44118981Smarcel	tf = td->td_frame;
45118981Smarcel
46118933Smarcel	switch (req) {
47118933Smarcel	case PT_GETKSTACK:
48118981Smarcel		if (data >= 0 && data < (tf->tf_special.ndirty >> 3)) {
49121635Smarcel			kstack = (uint64_t*)(td->td_kstack +
50121635Smarcel			    (tf->tf_special.bspstore & 0x1ffUL));
51118933Smarcel			error = copyout(kstack + data, addr, 8);
52118981Smarcel		}
53118933Smarcel		break;
54118933Smarcel	case PT_SETKSTACK:
55118981Smarcel		if (data >= 0 && data < (tf->tf_special.ndirty >> 3)) {
56121635Smarcel			kstack = (uint64_t*)(td->td_kstack +
57121635Smarcel			    (tf->tf_special.bspstore & 0x1ffUL));
58118933Smarcel			error = copyin(addr, kstack + data, 8);
59118981Smarcel		}
60118933Smarcel		break;
61118933Smarcel	}
62118933Smarcel
63118933Smarcel	return (error);
64118933Smarcel}
65