uImage wrapper removal?

Does anyone know if there's a utility to remove the U-Boot wrapper from a uImage (gzipped kernel, etc)? I'm creating a single uImage with kernel and ramdisk and I need to extract the kernel, replace the ramdisk and put it all back together after my Linux kernel has booted. I believe objcopy will allow me to extract the kernel from kernel/ramdisk ELF image but that's off-topic.

Just checking to see if there's something already out there of if this has been discussed before.

Thanks,

Tom

Something along the lines of this

dd if=uImage of=zImage bs=64 skip=1

The header is the first 64 bytes.

U-Boot just prepends a 64 byte header (see include/image.h).

So "dd if=uImage of=kernel bs=64 skip=1" will do the job, as will "tail -c +65 uImage >kernel".

No need for special tools. Just use the standard Unix toolbox for file manipulation commands.

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
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