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

* Dave Hansen:

On 10/12/22 05:29, Florian Weimer wrote:

quoted

quoted

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