1/* Linux mmap system call. x86-64 version.
2 Copyright (C) 2015-2023 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 <https://www.gnu.org/licenses/>. */
19
20#ifndef MMAP_X86_64_INTERNAL_H
21#define MMAP_X86_64_INTERNAL_H
22
23#include <ldsodefs.h>
24
25/* If the Prefer_MAP_32BIT_EXEC bit is set, try to map executable or
26 denywrite pages with MAP_32BIT first. */
27#define MMAP_PREPARE(addr, len, prot, flags, fd, offset) \
28 if ((addr) == NULL \
29 && (((prot) & PROT_EXEC) != 0 \
30 || ((flags) & MAP_DENYWRITE) != 0) \
31 && HAS_ARCH_FEATURE (Prefer_MAP_32BIT_EXEC)) \
32 { \
33 void *ret = (void*) INLINE_SYSCALL_CALL (mmap, (addr), (len), \
34 (prot), \
35 (flags) | MAP_32BIT, \
36 (fd), (offset)); \
37 if (ret != MAP_FAILED) \
38 return ret; \
39 }
40
41#include_next <mmap_internal.h>
42
43#endif
44