Nexmon_Debugger: for ARM microcontroller in the BCM4339 Wi-Fi chip

Nexmon Debugger

To analyze the FullMAC firmware running on the ARM microcontroller in the BCM4339 Wi-Fi chip, we created a debugger in software that directly accesses the hardware registers of the ARM Debugging core. As we do not have access to the JTAG port, we generate exceptions whenever a breakpoint or watchpoint is triggered. We handle those exceptions in our firmware patch and can then continue with the execution of the firmware code.[…]

https://github.com/seemoo-lab/nexmon_debugger