sysdeps/unix/sysv/linux/i386/mmap.c

   1 /* Copyright (C) 2015-2017 Free Software Foundation, Inc.
   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
   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.
   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
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <sys/types.h>
  19 #include <sys/mman.h>
  20 #include <errno.h>
  21 #include <sysdep.h>
  22
  23 #ifndef MMAP_PAGE_UNIT
  24 # define MMAP_PAGE_UNIT 4096UL
  25 #endif
  26
  27 __ptr_t
  28 __mmap (__ptr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
  29 {
  30   if (offset & (MMAP_PAGE_UNIT - 1))
  31     return (__ptr_t) INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
  32   return (__ptr_t) INLINE_SYSCALL (mmap2, 6, addr, len, prot, flags, fd,
  33                                    offset / MMAP_PAGE_UNIT);
  34 }
  35
  36 weak_alias (__mmap, mmap)