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    SubjectRe: [RFC][PATCH] Randomize kernel base address on boot
    On 05/31/2011 09:52 AM, Matthew Garrett wrote:
    > On Thu, May 26, 2011 at 04:39:27PM -0400, Dan Rosenberg wrote:
    >> 1. I'm nearly finished a first draft of code to parse the BIOS E820
    >> memory map to determine where it's safe to place the randomized kernel.
    >> This code accounts for overlapping regions, as well as potential
    >> conflicts in region types (free vs. reserved, etc.), in favor of
    >> non-free types. The end result is, I'll have a reasonable upper bound.
    > The BIOS E820 map, or the kernel representation? In either case, this
    > isn't going to work well with EFI. There are regions that will be marked
    > as available in the E820 map that we *mustn't* touch until we've entered
    > EFI virtual mode.
    > (This is, clearly, insane).

    I believe we could (should!) mark them reserved, not available, in the
    E820 map and free them later.


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