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b9eb92ab | 1 | /* Linux mmap system call. x86-64 version. |
bfff8b1b | 2 | Copyright (C) 2015-2017 Free Software Foundation, Inc. |
b9eb92ab L |
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> |