]> git.ipfire.org Git - thirdparty/glibc.git/blame - misc/mmap64.c
aarch64: add STO_AARCH64_VARIANT_PCS and DT_AARCH64_VARIANT_PCS
[thirdparty/glibc.git] / misc / mmap64.c
CommitLineData
688903eb 1/* Copyright (C) 1997-2018 Free Software Foundation, Inc.
b9b49b44
UD
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
41bdb6e2
AJ
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
b9b49b44
UD
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2 12 Lesser General Public License for more details.
b9b49b44 13
41bdb6e2 14 You should have received a copy of the GNU Lesser General Public
59ba27a6
PE
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
b9b49b44
UD
17
18#include <errno.h>
19#include <sys/mman.h>
20#include <sys/types.h>
21
22/* Map addresses starting near ADDR and extending for LEN bytes. From
23 OFFSET into the file FD describes according to PROT and FLAGS. If ADDR
24 is nonzero, it is the desired mapping address. If the MAP_FIXED bit is
25 set in FLAGS, the mapping will be at ADDR exactly (which must be
26 page-aligned); otherwise the system chooses a convenient nearby address.
27 The return value is the actual mapping address chosen or MAP_FAILED
28 for errors (in which case `errno' is set). A successful `mmap' call
29 deallocates any previous mapping for the affected region. */
30
f17a4233
JM
31void *
32__mmap64 (void *addr, size_t len, int prot, int flags, int fd,
b9b49b44
UD
33 __off64_t offset)
34{
35 off_t small_offset = (off_t) offset;
36
37 if (small_offset != offset)
38 {
39 /* We cannot do this since the offset is too large. */
40 __set_errno (EOVERFLOW);
41 return MAP_FAILED;
42 }
43
44 return __mmap (addr, len, prot, flags, fd, small_offset);
45}
46
47weak_alias (__mmap64, mmap64)
fa872e1b 48libc_hidden_def (__mmap64)