diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/x86_64/64/mmap_internal.h')
-rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/64/mmap_internal.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/64/mmap_internal.h b/sysdeps/unix/sysv/linux/x86_64/64/mmap_internal.h new file mode 100644 index 0000000000..06254efb94 --- /dev/null +++ b/sysdeps/unix/sysv/linux/x86_64/64/mmap_internal.h @@ -0,0 +1,42 @@ +/* Linux mmap system call. x86-64 version. + Copyright (C) 2015-2017 Free Software Foundation, Inc. + + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef MMAP_X86_64_INTERNAL_H +#define MMAP_X86_64_INTERNAL_H + +#include <ldsodefs.h> + +/* If the Prefer_MAP_32BIT_EXEC bit is set, try to map executable pages + with MAP_32BIT first. */ +#define MMAP_PREPARE(addr, len, prot, flags, fd, offset) \ + if ((addr) == NULL \ + && ((prot) & PROT_EXEC) != 0 \ + && HAS_ARCH_FEATURE (Prefer_MAP_32BIT_EXEC)) \ + { \ + void *ret = (void*) INLINE_SYSCALL_CALL (mmap, (addr), (len), \ + (prot), \ + (flags) | MAP_32BIT, \ + (fd), (offset)); \ + if (ret != MAP_FAILED) \ + return ret; \ + } + +#include_next <mmap_internal.h> + +#endif |