temporary close kernel print message:
echo 0 > /proc/sys/kernel/printk
temporary open all kernel print message:
echo 8 > /proc/sys/kernel/printk
look kernel interrupt message:
cat /proc/interrupts
mount debugfs:
mount -t debugfs none /sys/kernel/debug
look gpio message:
cat /sys/kernel/debug/gpio
.o file disassembling:
arm-linux-gnueabihf-objdump -d -S test.o
.dtb file decompilation:
dtc -I dtb -O dts imx6ull-mzq.dtb > my.dts
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