Re: [PATCH v2 01/39] Documentation/x86: Add CET description

Florian Weimer
2022-10-12T16:54:32Z

* Dave Hansen:

> On 10/12/22 05:29, Florian Weimer wrote:
>>> What did you think of the proposal to disable existing binaries and
>>> start from scratch? Elaborated in the coverletter in the section
>>> "Compatibility of Existing Binaries/Enabling Interface".
>> The ABI was finalized around four years ago, and we have shipped several
>> Fedora and Red Hat Enterprise Linux versions with it. Other
>> distributions did as well. It's a bit late to make changes now, and
>> certainly not for such trivialities.
>
> Just to be clear: You're saying that a user/kernel ABI was "finalized"
> by glibc shipping the user side of it, before there being an upstream
> kernel implementation?

Sorry for being unclear. I was refering to the x86-64 ELF psABI
supplement for CET, not the kernel/userspace interface, which still does
not exist in its final form as of today, as far as I understand it.

Thanks,
Florian