It’s defined as `unsigned char`. SB800: sb_Before_Pci_Init shift out of bounds src/vendorcode/amd/cimx/sb800/SBCMN.c:643:53 ubsan: unrecoverable error. Found-by: UBSAN Change-Id: I0c5fa16bce5b68ed3b48bb17eae6d81af894b688 Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/51284 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>