x86/efistub: Branch straight to kernel entry point from C code

Browse source

Instead of returning to the calling code in assembler that does nothing
more than perform an indirect call with the boot_params pointer in
register ESI/RSI, perform the jump directly from the EFI stub C code.
This will allow the asm entrypoint code to be dropped entirely in
subsequent patches.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20230807162720.545787-4-ardb@kernel.org

...

This commit is contained in:

Ard Biesheuvel 2023-08-07 18:27:00 +02:00 • committed by Borislav Petkov (AMD)

parent 2f69a81ad6

commit d2d7a54f69

1 changed files with 17 additions and 5 deletions

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

Download patch file Download diff file Expand all files Collapse all files

22

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

View file