1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2011 NetApp, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#ifndef WITHOUT_CAPSICUM
#include <sys/capsicum.h>
#endif
#include <sys/select.h>
#ifndef WITHOUT_CAPSICUM
#include <capsicum_helpers.h>
#endif
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>
#include <stdbool.h>
#include <sysexits.h>
#include "inout.h"
#include "pci_lpc.h"
#include "debug.h"
#define BVM_CONSOLE_PORT 0x220
#define BVM_CONS_SIG ('b' << 8 | 'v')
#ifdef __FreeBSD__
static struct termios tio_orig, tio_new;
static void
ttyclose(void)
{
tcsetattr(STDIN_FILENO, TCSANOW, &tio_orig);
}
#endif
static void
ttyopen(void)
{
#ifdef __FreeBSD__
tcgetattr(STDIN_FILENO, &tio_orig);
cfmakeraw(&tio_new);
tcsetattr(STDIN_FILENO, TCSANOW, &tio_new);
raw_stdio = 1;
atexit(ttyclose);
#endif
}
static bool
tty_char_available(void)
{
fd_set rfds;
struct timeval tv;
FD_ZERO(&rfds);
FD_SET(STDIN_FILENO, &rfds);
tv.tv_sec = 0;
tv.tv_usec = 0;
if (select(STDIN_FILENO + 1, &rfds, NULL, NULL, &tv) > 0) {
return (true);
} else {
return (false);
}
}
static int
ttyread(void)
{
char rb;
if (tty_char_available()) {
read(STDIN_FILENO, &rb, 1);
return (rb & 0xff);
} else {
return (-1);
}
}
static void
ttywrite(unsigned char wb)
{
(void) write(STDOUT_FILENO, &wb, 1);
}
static int
console_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes,
uint32_t *eax, void *arg)
{
static int opened;
#ifndef WITHOUT_CAPSICUM
cap_rights_t rights;
cap_ioctl_t cmds[] = { TIOCGETA, TIOCSETA, TIOCGWINSZ };
#endif
if (bytes == 2 && in) {
*eax = BVM_CONS_SIG;
return (0);
}
/*
* Guests might probe this port to look for old ISA devices
* using single-byte reads. Return 0xff for those.
*/
if (bytes == 1 && in) {
*eax = 0xff;
return (0);
}
if (bytes != 4)
return (-1);
if (!opened) {
#ifndef WITHOUT_CAPSICUM
cap_rights_init(&rights, CAP_EVENT, CAP_IOCTL, CAP_READ,
CAP_WRITE);
if (caph_rights_limit(STDIN_FILENO, &rights) == -1)
errx(EX_OSERR, "Unable to apply rights for sandbox");
if (caph_ioctls_limit(STDIN_FILENO, cmds, nitems(cmds)) == -1)
errx(EX_OSERR, "Unable to apply rights for sandbox");
#endif
ttyopen();
opened = 1;
}
if (in)
*eax = ttyread();
else
ttywrite(*eax);
return (0);
}
SYSRES_IO(BVM_CONSOLE_PORT, 4);
static struct inout_port consport = {
"bvmcons",
BVM_CONSOLE_PORT,
1,
IOPORT_F_INOUT,
console_handler
};
void
init_bvmcons(void)
{
register_inout(&consport);
}
|
