The Old New Thing

Advantages of knowing your x86 machine code

November 11, 2004 Nov 11, 2004 11/11/04

Raymond Chen

Next time you find yourself debugging in assembly language (which for some of us is the only way we debug), here are some machine code tricks you may wish to try out: 90 This is the single-byte NOP opcode. If you want to patch out code and don't want to think about it, just whack some 90's over it. To undo it, you have to patch ...