[uml-devel] adding a system call in uml

[Mohammad Jawwad <mjawwad@shaw.ca>]

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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


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