1  /* Copyright (C) 2000-2023 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     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <unistd.h>
      19  #include <sys/param.h>
      20  #include <errno.h>
      21  
      22  #include <ldsodefs.h>
      23  #include <sysdep.h>
      24  #include <sys/syscall.h>
      25  
      26  /* Return the system page size.  */
      27  int
      28  __getpagesize (void)
      29  {
      30    int result;
      31  
      32    if (GLRO(dl_pagesize) != 0)
      33      return GLRO(dl_pagesize);
      34  
      35    result = INTERNAL_SYSCALL_CALL (getpagesize);
      36    /* The only possible error is ENOSYS.  */
      37    if (!INTERNAL_SYSCALL_ERROR_P (result))
      38      return result;
      39  
      40    return 4096;
      41  }
      42  libc_hidden_def (__getpagesize)
      43  weak_alias (__getpagesize, getpagesize)