As part of my ongoing exploration of the internals of the Xiaomi vacuum robot, I took a more thorough look at the boot process of the Allwinner SoC today. It turns out they use a slightly patched version of Allwinner’s U-Boot tree. When disassembling the U-Boot present on the device and checking the source in […]

continue reading An even easier way of rooting the Xiaomi vacuum robot (also, a generic bootloader backdoor on some Allwinner devices)