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    SubjectRe: x86 embedded - Problem getting past 'move compressed kernel before decompression'
    On 03/01/2010 11:41 AM, Graeme Russ wrote:
    > H. Peter Anvin wrote:
    >> On 03/01/2010 03:56 AM, Graeme Russ wrote:
    >>> I have done a little more digging. By adding an ascii string before
    >>> relocated: label, I am able to determine that the int3 after the relocated:
    >>> label exists in bzImage at offset 0x1C3FD7
    >>>
    >>> EAX holds (for the jump) 0x5379d0 (different bzImage of course). The
    >>> contents of memory at this address is in bzImage at offset 0x1C09D7 - A
    >>> difference of 0x3600 (seems too even to be random)
    >>>
    >>> I'm obviously doing something hideously wrong, but what?
    >>>
    >>
    >> 0x3600 sounds like the size of the real-mode code in bzImage.
    >>
    >
    > But what could I be doing to cause the miscalculation? From what I
    > understand, everything looks to be calculated at build time
    >

    If I were to guess, you loaded the entire bzImage into high memory,
    rather than just the PM portion thereof.

    -hpa



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