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
|
/* mmap - map files or devices into memory. Linux version.
Copyright (C) 2017-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <errno.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sysdep.h>
#include <stdint.h>
#ifndef __OFF_T_MATCHES_OFF64_T
# include <mmap_internal.h>
/* An architecture may override this. */
# ifndef MMAP_ADJUST_OFFSET
# define MMAP_ADJUST_OFFSET(offset) offset
# endif
void *
__mmap (void *addr, size_t len, int prot, int flags, int fd, off_t offset)
{
MMAP_CHECK_PAGE_UNIT ();
if (offset & MMAP_OFF_LOW_MASK)
return (void *) INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
#ifdef __NR_mmap2
return (void *) MMAP_CALL (mmap2, addr, len, prot, flags, fd,
offset / (uint32_t) MMAP2_PAGE_UNIT);
#else
return (void *) MMAP_CALL (mmap, addr, len, prot, flags, fd,
MMAP_ADJUST_OFFSET (offset));
#endif
}
weak_alias (__mmap, mmap)
libc_hidden_def (__mmap)
#endif /* __OFF_T_MATCHES_OFF64_T */
|
