dasharo-tools/vboot/workbuf_parse

#!/bin/bash

# A small parser for Vboot v2 workbuffer

cbmem -r 78007343 > /tmp/vbnv.bin 2> /dev/null

if [ $? -ne 0 ]; then
	echo "Could not read Vboot workbuf!"
	exit 1
fi

recovery_reason=$(dd if=/tmp/vbnv.bin bs=1 count=1 skip=$((0x194)) 2> /dev/null | xxd -p)
if [ $recovery_reason -ne "00" ]; then
	echo "Recovery boot mode"
	echo -en "Recovery reason:\t0x"
	echo $recovery_reason
else
	echo "Normal boot mode"
	cur_fw_slot=$(($(dd if=/tmp/vbnv.bin bs=1 count=4 skip=$((0x19c)) 2> /dev/null | xxd -p)))
	echo -en "FW slot:\t"
	case $cur_fw_slot in

		0)
			echo "A"
			;;
		1)
			echo "B"
			;;
		*)
			echo "Unknown!"
			;;

	esac
fi