1 /* Copyright (C) 2000-2022 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
__getpagesize(void)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)
44