sysdeps/unix/sysv/linux/sparc/sparc32/getpagesize.c

   1 /* Copyright (C) 1997, 2002, 2003, 2004 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <unistd.h>
  20 #include <sys/param.h>
  21 #include <ldsodefs.h>
  22 #include <sysdep.h>
  23
  24 /* Return the system page size.  This value will either be 4k or 8k depending
  25    on whether or not we are running on Sparc v9 machine.  */
  26
  27 /* If we are not a static program, this value is collected from the system
  28    via the AT_PAGESZ auxiliary argument.  If we are a static program, we
  29    use the getpagesize system call.  */
  30
  31 int
  32 __getpagesize ()
  33 {
  34   int ret = GLRO(dl_pagesize);
  35   if (ret == 0)
  36     {
  37       INTERNAL_SYSCALL_DECL (err);
  38       ret = INTERNAL_SYSCALL (getpagesize, err, 0);
  39 #ifndef SHARED
  40       GLRO(dl_pagesize) = ret;
  41 #endif
  42     }
  43   return ret;
  44 }
  45 libc_hidden_def (__getpagesize)
  46 weak_alias (__getpagesize, getpagesize)