Unibody mbp can't boot mach_kernel removed

[DAMNiatx]

I just mistaken remove the mach kernel on root directory , now it can't boot at all, anybody have idea to solve this ?, or i need to reinstall the OS

 

[Hellhammer]

You can try these steps but I'm pretty sure you have to reinstall OS X anyway. Don't worry, it won't erase any data though so you're safe even if you don't have a backup