efi/x86: Decompress at start of PE image load address

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When booted via PE loader, define image_offset to hold the offset of
startup_32() from the start of the PE image, and use it as the start of
the decompression buffer.

[ mingo: Fixed the grammar in the comments. ]

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/20200303221205.4048668-3-nivedita@alum.mit.edu
Link: https://lore.kernel.org/r/20200308080859.21568-17-ardb@kernel.org

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Arvind Sankar 2020-03-08 09:08:47 +01:00 • committed by Ingo Molnar

parent 8ef44be393

commit 1887c9b653

3 changed files with 70 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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17

arch/x86/boot/compressed/head_32.S

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42

arch/x86/boot/compressed/head_64.S

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17

drivers/firmware/efi/libstub/x86-stub.c

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