sysdeps/unix/sysv/linux/m68k/getpagesize.c

   1 /* Copyright (C) 2000-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Andreas Schwab <schwab@suse.de>.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <unistd.h>
  20 #include <sys/param.h>
  21 #include <errno.h>
  22
  23 #include <ldsodefs.h>
  24 #include <sysdep.h>
  25 #include <sys/syscall.h>
  26
  27 /* Return the system page size.  */
  28 int
  29 __getpagesize (void)
  30 {
  31 #ifdef __NR_getpagesize
  32   int result;
  33 #endif
  34
  35   if (GLRO(dl_pagesize) != 0)
  36     return GLRO(dl_pagesize);
  37
  38 #ifdef __NR_getpagesize
  39   INTERNAL_SYSCALL_DECL (err);
  40   result = INTERNAL_SYSCALL (getpagesize, err, 0);
  41   /* The only possible error is ENOSYS.  */
  42   if (!INTERNAL_SYSCALL_ERROR_P (result, err))
  43     return result;
  44 #endif
  45
  46   return 4096;
  47 }
  48 libc_hidden_def (__getpagesize)
  49 weak_alias (__getpagesize, getpagesize)