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
|
/* Copyright (C) 2011-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
Based on work contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <errno.h>
#include <endian.h>
#include <unistd.h>
#include <sysdep-cancel.h>
#include <sys/syscall.h>
#include <kernel-features.h>
static ssize_t
do_pread (int fd, void *buf, size_t count, off_t offset)
{
assert (sizeof (offset) == 4);
return INLINE_SYSCALL (pread64, __ALIGNMENT_COUNT (5, 6), fd,
buf, count, __ALIGNMENT_ARG
__LONG_LONG_PAIR (offset >> 31, offset));
}
ssize_t
__libc_pread (fd, buf, count, offset)
int fd;
void *buf;
size_t count;
off_t offset;
{
if (SINGLE_THREAD_P)
return do_pread (fd, buf, count, offset);
int oldtype = LIBC_CANCEL_ASYNC ();
ssize_t result = do_pread (fd, buf, count, offset);
LIBC_CANCEL_RESET (oldtype);
return result;
}
strong_alias (__libc_pread, __pread)
weak_alias (__libc_pread, pread)
|
