Kernel debug network adapter download6/22/2023 The user on the debugging machine uses GDB to attach the serial device file (for example, /dev/ttyS1) using the command target remote /dev/ttyS1. The target and debugging devices are connected via a serial cable. KGDB relies on a serial port to connect the debugging device and the target device. So how does this process work?Īndroid is built on the Linux kernel, which includes a built-in kernel debugger, KGDB. ![]() Researchers can use debugging to determine the current state of CPU execution, making analysis go more quickly. The method I've found still uses this as the key point, but can be used on modern Android devices. The method proposed for this dates back to 2010, which means that some parts of the instructions are now outdated. Alternately, kernel debugging via the serial-over-usb channel is also possible. However, for some people not as skilled in hardware building (such as software engineers like myself), this can be difficult. Drake and Ryan Smith built a UART debug cable for this purpose, which works well. In this post, I describe a method to perform kernel debugging on the Nexus 6P and the Google Pixel, without the need for any specialized hardware. However, it is more difficult to do kernel debugging on Android devices such as the Google Nexus 6P. On desktop platforms such as Windows, macOS, and Linux, this is easy to perform. Kernel debugging gives security researchers a tool to monitor and control a device under analysis.
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