efi/x86: Remove extra headroom for setup block

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  223e3ee56f ("efi/x86: add headroom to decompressor BSS to account for setup block")

added headroom to the PE image to account for the setup block, which
wasn't used for the decompression buffer.

Now that the decompression buffer is located at the start of the image,
and includes the setup block, this is no longer required.

Add a check to make sure that the head section of the compressed kernel
won't overwrite itself while relocating. This is only for
future-proofing as with current limits on the setup and the actual size
of the head section, this can never happen.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200303221205.4048668-5-nivedita@alum.mit.edu
Link: https://lore.kernel.org/r/20200308080859.21568-19-ardb@kernel.org

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Arvind Sankar 2020-03-08 09:08:49 +01:00 • committed by Ingo Molnar

parent 26725192c4

commit 964124a97b

1 changed files with 26 additions and 2 deletions

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arch/x86/boot/tools/build.c

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