1/* Linux mmap system call. x86-64 version.
2 Copyright (C) 2015-2017 Free Software Foundation, Inc.
3
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
19
20#include <ldsodefs.h>
21
22/* If the Prefer_MAP_32BIT_EXEC bit is set, try to map executable pages
23 with MAP_32BIT first. */
24#define MMAP_PREPARE(addr, len, prot, flags, fd, offset) \
25 if ((addr) == NULL \
26 && ((prot) & PROT_EXEC) != 0 \
27 && HAS_ARCH_FEATURE (Prefer_MAP_32BIT_EXEC)) \
28 { \
29 __ptr_t ret = (__ptr_t) INLINE_SYSCALL (mmap, 6, (addr), (len), \
30 (prot), \
31 (flags) | MAP_32BIT, \
32 (fd), (offset)); \
33 if (ret != MAP_FAILED) \
34 return ret; \
35 }
36
37#include <sysdeps/unix/sysv/linux/wordsize-64/mmap.c>
38