El 02/09/2025 a las 17:14, Christoph Berg escribió: > Re: Stefano Rivera >> It seems that the intention of the new instruction was to be interpreted as >> a NOP on older hardware, but that obviously didn't happen on these non-Intel >> CPUs. > > https://lists.debian.org/debian-devel/2023/10/msg00120.html states > these processors are unsupported. > > Christoph
The Pentium Pro manual, page 417, does not define instruction ENDBR32. https://psc.informatik.uni-jena.de/hw/p-pro-3.pdf. They are "reserved". If you are targetting and advertising i686-compatibility, do not use instructions that are not present in the Pentium Pro. What is the exact goal of keeping these instructions, even? I keep seeing you refuse because "it is not supported" but I don't understand what you wanna achieve exactly keeping them when the kernel will not support IBT.
