[PATCH] x86: Improve TLS transition error check

[H.J. Lu]

On Wed, Jul 24, 2024, 2:26 PM Jan Beulich <jbeulich@suse.com> wrote:

> On 24.07.2024 05:54, H.J. Lu wrote:
> > Provide detailed TLS transition errors when unsupported instructions are
> > used.  Treat R_X86_64_CODE_4_GOTTPOFF and R_X86_64_CODE_6_GOTTPOFF as
> > R_X86_64_GOTTPOFF when performing TLS transition.
>
> General question (the code was like this before, just with less details in
> the diagnostic): Do such failures really need to be errors? What if the
> code is correct all by itself, just that the linker can't do the
> transition?
>

TLS ABI only support some specific code sequences.
See the related GCC bug for an example.
Without the linker error, the GCC bug may go undetected.


> Jan
>
>
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