我编译uboot时有错误，mkb12 can not execute binary file，mkb12是什么

buyuan123

我编译uboot时有错误，mkb12 can not execute binary file，mkb12是什么
错误显示：
/mnt/qt4412data/x4412_ics_rtm_v10/uboot/../prebuilt/linux-x86/toolchain/arm-2009q3/bin/arm-none-linux-gnueabi-objcopy -O srec u-boot u-boot.srec
/mnt/qt4412data/x4412_ics_rtm_v10/uboot/../prebuilt/linux-x86/toolchain/arm-2009q3/bin/arm-none-linux-gnueabi-objcopy --gap-fill=0xff -O binary u-boot u-boot.bin
./mkbl2 u-boot.bin bl2.bin 14336
/bin/bash: ./mkbl2: cannot execute binary file
make: *** [u-boot.bin] Error 126
make: INTERNAL: Exiting with 3 jobserver tokens available; should be 2!