Hello,

How does one add a system call to user mode linux?

I followed the instructions here:=

http://user-mode-linux.sourceforge.net/lksct/

Instead of using his stub(which dosent work) I used this one:

#include <stdio.h>

#include <sys/syscall.h>

#include <linux/unistd.h>

int main()

{

    syscall(253);   // I assigned number 253 to my system call in unistd.h

    return 0;

}

The program compiles but dosent print out the the output from the printk() statement.

Has anybody successfully installed a system call in uml?

Thank you