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    SubjectRe: [patches] [PATCH] [21/22] x86_64: Extend bzImage protocol for relocatable bzImage
    Jeremy Fitzhardinge wrote:
    > Eric W. Biederman wrote:
    >> All it does is set a flag that tells a bootloader.
    >> "Hey. I can run when loaded a non-default address, and this is what
    >> you have to align me to."
    >>
    >> All relocation processing happens in the kernel itself.
    >>
    >
    > Is it possible to decompress and extract the kernel image from the
    > bzImage without executing it? Ie, is there enough information to find
    > the compressed data part of the bzImage by inspection?
    >
    > At some point we'll need to change the Xen domain builder to handle
    > bzImage files, and it would be best if we didn't need to run them.
    >

    Probabilistically, you might be able to (search for a gzip header), but
    it is *definitely* not guaranteed by protocol.

    -hpa
    -
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