6.1. Introduction

Finally, if you still want to try this crazy idea and write something in assembly (if you've reached this section -- you're real assembly fan), here's what you need to start.

As you've read before, you can write for Linux in different ways; I'll show how to use direct kernel calls, since this is the fastest way to call kernel service; our code is not linked to any library, does not use ELF interpreter, it communicates with kernel directly.

I will show the same sample program in two assemblers, nasm and gas , thus showing Intel and AT&T syntax.

First of all you need assembler (compiler) -- nasm or gas .

Second, you need a linker -- ld , since assembler produces only object code. Almost all distributions have gas and ld , in the binutils package.