This year is going to be 5 years since I first joined Skyward Experimental Rocketry, and - oh boy, it has been a hell of a ride! We’ve just open-sourced the on-board software of our latest rocket, so I figured it would be cool to write a …

I’ve been looking at some old picoCTF challenges lately, this is the solve for one of them. It’s a gentle introduction to decompilation and reversing, but with a spinkle of Web Assembly on top.

What happens when your code calls printf()? And what’s up with all that .got.plt stuff that you see when you decompile a binary? Here are some sketches I drew to help me remember this kind of stuff.