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
|
/*-
* Copyright (c) 2015 Nuxi, https://nuxi.nl/
*
* 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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/limits.h>
#include <sys/malloc.h>
#include <sys/syscallsubr.h>
#include <sys/systm.h>
#include <sys/uio.h>
#include <contrib/cloudabi/cloudabi64_types.h>
#include <compat/cloudabi64/cloudabi64_proto.h>
/* Copies in 64-bit iovec structures from userspace. */
static int
cloudabi64_copyinuio(const cloudabi64_iovec_t *iovp, size_t iovcnt,
struct uio **uiop)
{
cloudabi64_iovec_t iovobj;
struct uio *uio;
struct iovec *iov;
size_t i;
int error;
/* Allocate uio and iovecs. */
if (iovcnt > UIO_MAXIOV)
return (EINVAL);
uio = malloc(sizeof(struct uio) + iovcnt * sizeof(struct iovec),
M_IOV, M_WAITOK);
iov = (struct iovec *)(uio + 1);
/* Initialize uio. */
uio->uio_iov = iov;
uio->uio_iovcnt = iovcnt;
uio->uio_segflg = UIO_USERSPACE;
uio->uio_offset = -1;
uio->uio_resid = 0;
/* Copy in iovecs. */
for (i = 0; i < iovcnt; i++) {
error = copyin(&iovp[i], &iovobj, sizeof(iovobj));
if (error != 0) {
free(uio, M_IOV);
return (error);
}
iov[i].iov_base = (void *)iovobj.iov_base;
iov[i].iov_len = iovobj.iov_len;
if (iov[i].iov_len > SSIZE_MAX - uio->uio_resid) {
free(uio, M_IOV);
return (EINVAL);
}
uio->uio_resid += iov[i].iov_len;
}
*uiop = uio;
return (0);
}
int
cloudabi64_sys_fd_pread(struct thread *td,
struct cloudabi64_sys_fd_pread_args *uap)
{
struct uio *uio;
int error;
error = cloudabi64_copyinuio(uap->iov, uap->iovcnt, &uio);
if (error != 0)
return (error);
error = kern_preadv(td, uap->fd, uio, uap->offset);
free(uio, M_IOV);
return (error);
}
int
cloudabi64_sys_fd_pwrite(struct thread *td,
struct cloudabi64_sys_fd_pwrite_args *uap)
{
struct uio *uio;
int error;
error = cloudabi64_copyinuio((const cloudabi64_iovec_t *)uap->iov,
uap->iovcnt, &uio);
if (error != 0)
return (error);
error = kern_pwritev(td, uap->fd, uio, uap->offset);
free(uio, M_IOV);
return (error);
}
int
cloudabi64_sys_fd_read(struct thread *td,
struct cloudabi64_sys_fd_read_args *uap)
{
struct uio *uio;
int error;
error = cloudabi64_copyinuio(uap->iov, uap->iovcnt, &uio);
if (error != 0)
return (error);
error = kern_readv(td, uap->fd, uio);
free(uio, M_IOV);
return (error);
}
int
cloudabi64_sys_fd_write(struct thread *td,
struct cloudabi64_sys_fd_write_args *uap)
{
struct uio *uio;
int error;
error = cloudabi64_copyinuio((const cloudabi64_iovec_t *)uap->iov,
uap->iovcnt, &uio);
if (error != 0)
return (error);
error = kern_writev(td, uap->fd, uio);
free(uio, M_IOV);
return (error);
}
|
