[PATCH v14 0/9] Add rseq extensible ABI support

[Florian Weimer]

* Florian Weimer:

> * Mathieu Desnoyers:
>
>> On 2024-11-21 14:08, Michael Jeanson wrote:
>>> Introduced in Linux v6.3 the rseq extensible ABI [1] will allow adding
>>> rseq features past the initial 32 bytes of the original ABI.
>>
>> Hi Florian,
>>
>> I am currently implementing a new rseq feature which requires adding
>> an 8-byte field, which goes beyond the 32 initial bytes (it reaches 36
>> bytes).
>>
>> I need to disable the glibc rseq integration with the tunable for
>> my development testing, but I am reaching a point where we will shortly
>> need the extensible rseq integration in glibc.
>>
>> How is review progressing ? How can we help ?
>
> There doesn't seem to be a __thread_pointer patch for C-SKY.
>
> There's a simple to resolve conflict in nptl/descr.h.
>
> TLS is currently broken due to the botched GET_ADDR_ARGS removal.  I'm
> testing the rseq series after reverting 5e249192cac7354af02a7347a0d8c.

So it looks like that TLS_DTV_AT_TP part doesn't work, unfortunately.  I
see many new failures (after the mentioned revert) on powerpc64le, which
is one of those targets.  I haven't tried to reproduce them yet on
AArch64.  The GCC compile farm has a powerpc64le test machine
(gcc120.fsffrance.org).

I should be able to look into this in more detail on Monday.

Thanks,
Florian