Creating a System Call in Linux

Question

We just got a midterm project today for my \"operating systems\" course, we are requested to implement a system call (and I guess I assume we\'ll have to write a piece of code t

Answer 1

I understand I'll need to update the table of the system calls

It's /usr/src/linux/arch/i386/kernel/syscall_table.S

does this mean I'll have to recompile the whole kernel, so the kernel knows about my module?

Yes, indeed.

Just wanted to get a feel for the size of the effort I'll be making.

If you know what code you are going to write as a part of the system call, you're already done. You only have to wait out the kernel recompilation time. Here's a set of instructions:

Implementing a System Call in Linux