[U-Boot-Users] about use mkimage to create uImage?

if i mkimage without compressing, kernel can run correct, the command is as follow ./tools/mkimage -A arm -O linux -T kernel -C none-a 0x30000000 -e0x30008000 -n "Linux" -d vmlinux uImage

but i want to create a compressed uImage,i use commands like these,it stop at "starting kernel..." arm-linux-objcopy -O binary -R.note -R.comment -S vmlinux linux.bin gzip -9 linux.bin ./tools/mkimage -A arm -O linux -T kernel -C gzip -a 0x30008000 -e0x30008000 -n "Linux" -d linux.bin.gz uImage

i think the second method should run well,and i see the same example in the Readme of u-boot src.

any hints are appreciate.