1 /* Copyright (C) 1999-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Jakub Jelinek <jakub@redhat.com>, 1999.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
25 #include <sys/syscall.h>
27 /* This is always 12, even on architectures where PAGE_SHIFT != 12. */
28 #if MMAP2_PAGE_SHIFT == -1
29 static int page_shift
;
31 # ifndef MMAP2_PAGE_SHIFT
32 # define MMAP2_PAGE_SHIFT 12
34 #define page_shift MMAP2_PAGE_SHIFT
39 __mmap64 (void *addr
, size_t len
, int prot
, int flags
, int fd
, off64_t offset
)
41 #if MMAP2_PAGE_SHIFT == -1
44 int page_size
= __getpagesize ();
45 page_shift
= __ffs (page_size
) - 1;
48 if (offset
& ((1 << page_shift
) - 1))
55 INLINE_SYSCALL (mmap2
, 6, addr
,
57 (off_t
) (offset
>> page_shift
));
60 weak_alias (__mmap64
, mmap64
)