Hi friends,
On the heels of seeing that this month's presentation will be about
reverse engineering, I thought I'd pipe up and mention that I have some
stuff that might be interesting.
I have a commercially-produced MIDI controller that has some bugs, but
is already obsoleted by the manufacturer. Long story short, its CPU is
an off-the-shelf ARM Cortex-M and the manufacturer didn't enable code
protection so I was able to download its firmware image in the clear.
In my journey to understand the existing code (in order to fix its bugs
and/or write better code), I've been developing a GUI RE tool for
Cortex-M machine code. Its features include:
- Disassembly view with instruction-by-instruction room for labels and
comments
- Emulation with single-step, breakpoints, and instruction skip
- Memory read/write watchpoints
- (limited) NVIC emulation
- (extremely limited) peripheral emulation
I call it CorTexMex (for Cortex-M Explorer) and would be proud to
demonstrate it at a meeting if enough folks are interested. It's
open-source, published on GitHub, and an ongoing work in progress.
Whaddya think?
-B
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