mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-27 21:03:32 +00:00
Code Issues Releases Wiki Activity

nolibc/sys: Implement getpagesize(2) function

Browse source 
This function returns the page size used by the running kernel. The
page size value is taken from the auxiliary vector at 'AT_PAGESZ' key.

'getpagesize(2)' is assumed as a syscall becuase the manpage placement
of this function is in entry 2 ('man 2 getpagesize') despite there is
no real 'getpagesize(2)' syscall in the Linux syscall table. Define
this function in 'sys.h'.

Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Ammar Faizi 2023-01-10 08:24:33 +01:00 committed by Paul E. McKenney
parent c61a078015
commit 7efd762e97
1 changed files with 21 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
tools/include/nolibc/sys.h
View file

@ -19,6 +19,7 @@
#include <linux/fs.h>
#include <linux/loop.h>
#include <linux/time.h>
#include <linux/auxvec.h>
#include "arch.h"
#include "errno.h"
@ -499,6 +500,26 @@ pid_t gettid(void)
return sys_gettid();
}
static unsigned long getauxval(unsigned long key);
/*
* long getpagesize(void);
*/
static __attribute__((unused))
long getpagesize(void)
{
long ret;
ret = getauxval(AT_PAGESZ);
if (!ret) {
SET_ERRNO(ENOENT);
return -1;
}
return ret;
}
/*
* int gettimeofday(struct timeval *tv, struct timezone *tz);