adb shell
su
cat /dev/block/bootdevice/by-name/boot > /sdcard/boot.img
cat /dev/block/bootdevice/by-name/system > /sdcard/system.img
cat /dev/block/bootdevice/by-name/cmnlib64 > /sdcard/cmnlib64.mbn
cat /dev/block/bootdevice/by-name/cmnlib > /sdcard/cmnlib.mbn
cat /dev/block/bootdevice/by-name/hyp > /sdcard/hyp.mbn
cat /dev/block/bootdevice/by-name/pmic > /sdcard/pmic.elf
cat /dev/block/bootdevice/by-name/tz > /sdcard/tz.mbn
cat /dev/block/bootdevice/by-name/aboot > /sdcard/emmc_appsboot.mbn
cat /dev/block/bootdevice/by-name/lksecapp > /sdcard/lksecapp.mbn
cat /dev/block/bootdevice/by-name/dsp > /sdcard/adspso.mbn
cat /dev/block/bootdevice/by-name/devcfg > /sdcard/devcfg.mbn
cat /dev/block/bootdevice/by-name/keymaster > /sdcard/keymaster.mbn
cat /dev/block/bootdevice/by-name/xbl> /sdcard/xbl.elf
cat /dev/block/bootdevice/by-name/rpm > /sdcard/rpm.mbn
cat /dev/block/bootdevice/by-name/weakbat > /sdcard/weakbat.bin
cat /dev/block/bootdevice/by-name/modem > /sdcard/NON-HLOS.bin
cat /dev/block/bootdevice/by-name/splash > /sdcard/splash.bin
cat /dev/block/bootdevice/by-name/bluetooth > /sdcard/BTFM.bin