efi/x86: Respect 32-bit ABI in efi32_pe_entry()

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verify_cpu() clobbers BX and DI. In case we have to return error, we need
to preserve them to respect the 32-bit calling convention.

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/20200301230436.2246909-3-nivedita@alum.mit.edu
Link: https://lore.kernel.org/r/20200308080859.21568-11-ardb@kernel.org

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Arvind Sankar 2020-03-08 09:08:41 +01:00 • committed by Ingo Molnar

parent 3cdcd6899e

commit 71ff44ac6c

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arch/x86/boot/compressed/head_64.S

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