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Re: [PATCH glibc 2.31 1/5] glibc: Perform rseq(2) registration at C startup and thread creation (v12)
- From: Florian Weimer <fweimer at redhat dot com>
- To: Carlos O'Donell <carlos at redhat dot com>
- Cc: Mathieu Desnoyers <mathieu dot desnoyers at efficios dot com>, Joseph Myers <joseph at codesourcery dot com>, Szabolcs Nagy <szabolcs dot nagy at arm dot com>, libc-alpha at sourceware dot org, Thomas Gleixner <tglx at linutronix dot de>, Ben Maurer <bmaurer at fb dot com>, Peter Zijlstra <peterz at infradead dot org>, "Paul E. McKenney" <paulmck at linux dot vnet dot ibm dot com>, Boqun Feng <boqun dot feng at gmail dot com>, Will Deacon <will dot deacon at arm dot com>, Dave Watson <davejwatson at fb dot com>, Paul Turner <pjt at google dot com>, Rich Felker <dalias at libc dot org>, linux-kernel at vger dot kernel dot org, linux-api at vger dot kernel dot org
- Date: Wed, 11 Sep 2019 21:58:08 +0200
- Subject: Re: [PATCH glibc 2.31 1/5] glibc: Perform rseq(2) registration at C startup and thread creation (v12)
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* Florian Weimer:
> * Carlos O'Donell:
>> On 9/11/19 3:08 PM, Florian Weimer wrote:
>>> * Carlos O'Donell:
>>>> It would be easier to merge the patch set if it were just an unconditional
>>>> registration like we do for set_robust_list().
>>> Note that this depends on the in-tree system call numbers list, which I
>>> still need to finish according to Joseph's specifications.
>> Which work is this? Do you have a URL reference to WIP?
Sorry, there was also this:
I also posted a build-many-glibcs.py patch at some point with an
automatic table update, but that still had the massive bot-cycle time.
My current line of thinking is to implement some --use-compilers flag,
so that you can build a fresh glibc checkout against an old, pre-built
compilers for the system call tables update, and then use the patched
glibc sources for one (and hopefully final) bot-cycle.