Extract the Linux-3.6.9 to location /usr/src/ or extract it on the Desktop and by typing the command on Terminal cd Desktop mv linux-3.6.9 /usr/src/

Create a NewFolder In /usr/src/Linux-3.6.9/

#include <linux/linkage.h> //for linking a system call
#include <linux/kernel.h> //for the printk asmlinkage long sys_myservice (int arg1) { printk(KERN_EMERG “My Service is Running”); return 1; }

Create a Makefile and add following code in it in Newfolder.
#####Makefile Start##### obj-y += myservice.o
#####Makefile End#######

In /usr/src/linux-3.6.9/include/asm-generic/unistd.h, define an index for system call.
#define __NR_myservice 273

Increment the system call count in same file of step 8.
#define NR_syscalls 274 as pointed by an arrow in the previous screenshot.

/usr/src/linux-3.6.9/arch/x86/syscalls/syscall_64.tbl, define a pointer to hold a reference to your system call routine.

In /usr/src/linux-3.6.9/include/linux/syscalls.h contain the declarations for system calls. Add the following line at the end of the file: asmlinkage long sys_myservice (int arg1);

Add directory path of the NewFolder to the Makefile (/usr/src/Linux-3.6.9/Makefile) core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ NewFolder/

Now on Terminal type these commands to be have root access to compile the privileged commands.

Compile Kernel cd usr/src/linux-3.6.9

* Enter (make oldconfig) * Start compiling to create a compressed kernel image (make) * Start compiling to kernel modules (make modules) * Install kernel modules (make modules_install) * Install kernel (make install) * Reboot System (reboot) Or Type make oldconfig make modules && make modules_install install reboot

15. Enter following code #include <stdio.h> #include <stdlib.h> #include <linux/unistd.h> /* for _syscall X macros/related stuff */ #include <linux/kernel.h> /* for struct sysinfo */ #define __NR_my_service 313 /* No of your system call in syscall_64.tbl list*/ int main() { int error; error=syscall( __NR_my_service); /* if return -1 syscall fails*/ printf("code error = %d\n ", error); return 0; } Place the testmyservice.c on Desktop and check it either it is working or not like this…