rseq enablement patches overview

[Mathieu Desnoyers]

----- On Dec 17, 2019, at 11:08 AM, Mathieu Desnoyers mathieu.desnoyers@efficios.com wrote:

> ----- On Nov 29, 2019, at 7:07 AM, Florian Weimer fweimer@redhat.com wrote:
> 
>> * Florian Weimer:
>> 
>>> Since my patchwork looks rather horrible right now and I posted a bunch
>>> of vaguely-related cleanups first, here are the patches that currently
>>> need review for rseq enablement:
>>>
>>>   Introduce <elf_machine_sym_no_match.h>
>>>   <https://sourceware.org/ml/libc-alpha/2019-10/msg00339.html>
>>>
>>>     This is needed in the implementation of _dl_lookup_direct in the
>>>     next patch.
>>>
>>>   Implement __libc_early_init
>>>   <https://sourceware.org/ml/libc-alpha/2019-10/msg00340.html>
>>>
>>>     This is the main patch.  rseq should be hooked into
>>>     __libc_early_init, around the __ctype_init call.
>>>
>>>   nptl: Start new threads with all signals blocked [BZ #25098]
>>>   <https://sourceware.org/ml/libc-alpha/2019-10/msg00383.html>
>>>
>>>     This is a long-standing issue which will affect rseq as well.
>> 
> 
> Hi Florian,
> 
> Sorry for the delayed reply,
> 
>> I reposted these patches:
>> 
>>  <https://sourceware.org/ml/libc-alpha/2019-11/msg00976.html>
>>  <https://sourceware.org/ml/libc-alpha/2019-11/msg00977.html>
> 
> For some reason I have issues applying this last patch (00977) on
> top of glibc master at commit a059f9505bb. Is there a specific commit
> I should use as a baseline ?

I found the conflicting patch:

commit 440b7f865 "Avoid late failure in dlopen in global scope update [BZ #25112]"

The conflict resolution was straightforward. I'll start updating the rseq
patchset.

Thanks,

Mathieu


> 
> Thanks,
> 
> Mathieu
> 
>>  <https://sourceware.org/ml/libc-alpha/2019-11/msg01016.html>
>> 
>>>   resolv/tst-idna_name_classify: Isolate from system libraries
>>>   <https://sourceware.org/ml/libc-alpha/2019-10/msg00338.html>
>>>
>>>     This is required to fix a test suite failure due to the ld.so static
>>>     link ABI changing in the __libc_early_init patch.  (I should
>>>     probably just push this one.)
>> 
>> This patch has been merged.
>> 
>> Thanks,
>> Florian
> 
> --
> Mathieu Desnoyers
> EfficiOS Inc.
> http://www.efficios.com

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com