Bug#1113774: Disabling -fcf-protection in sudo for bookworm
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.
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