Who’s 0xabadbabe and why?
Summary
This post recounts debugging a Windows USB EHCI issue and a mysterious 0xabadbabe write. It explains how the author used tools like bgrep and bcut to dissect code and demonstrates that the 0xabadbabe write is a deliberate breakpoint for debuggers, with the blue screen stemming from a separate memory-mapping bug in the simulated USB device. The piece blends practical debugging notes with a look at reverse engineering and open source tooling.