[U-Boot] how to make mkimage command work?

[apple pie]

Hi,
 
Please correct me if I am wrong. From what I understand, u-boot itself is relocated to RAM by calling 
the procedure: relocate_code at the end of the procedure: board_init_f . 
 
There is a need for me to load an executable to a static address (say, 0x82xx_xxxx) in RAM such that 
control could be passed to this executable from U-boot. How could this be accomplished, with the
limitation that:
 
the executeable is to be downloaded together with u-boot.bin, zImage, ramdisk and other images
that are to be be executed before u-boot etc, as a blob onto the eMMC?
 
 
Could u-boot be used to relocate the said executable to the address: 0x82xx_xxxx? u-boot does not
have the knowledge where this executable resides in eMMC. This also means that it would not be possible
to use u-boot command: cp (memory copy) to do the relocation, as the command itself requires knowledge
of the source address.