From: Eli Zaretskii <eliz@gnu.org>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: wilde@sha-bang.de, emacs-devel@gnu.org, akrl@sdf.org
Subject: Re: Getting ready to land native-compilation on master
Date: Wed, 14 Apr 2021 20:41:00 +0300 [thread overview]
Message-ID: <83a6q0zrv7.fsf@gnu.org> (raw)
In-Reply-To: <87lf9klqmn.fsf@linaro.org> (message from Alex Bennée on Wed, 14 Apr 2021 18:28:49 +0100)
> From: Alex Bennée <alex.bennee@linaro.org>
> Cc: wilde@sha-bang.de, akrl@sdf.org, emacs-devel@gnu.org
> Date: Wed, 14 Apr 2021 18:28:49 +0100
>
> >> sysctl -w security.pax.mprotect.global=0
> >> sysctl -w security.pax.mprotect.enabled=0
> >> This is not a Emacs specific problem but a problem with libgccjit
> >> itself. (The basic gcc jit "Hello World" example also fails with
> >> memory protection in place).
> >
> > I'm not sure I understand why this happens, but I think this issue
> > should be reported to the GCC Bugzilla.
>
> I suspect this is a change similar to the recent MacOS one where
> eXecutable pages cannot be mapped as Writable. The QEMU project recently
> had to implement split mappings for it's JIT to workaround this although
> I dare say there is probably a JIT interface that should be used to give
> suitable access to pages but that is something for the BSD experts to
> chime in on.
Are you sure this is relevant? libgccjit, contrary to its name, is
not JIT code production, at least in Emacs. It produces a file, a
shared library which is later loaded. Why does this have to need
executable memory pages?
next prev parent reply other threads:[~2021-04-14 17:41 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-09 14:02 Getting ready to land native-compilation on master Eli Zaretskii
2021-04-09 14:27 ` tomas
2021-04-09 14:33 ` Stefan Kangas
2021-04-09 14:39 ` T.V Raman
2021-04-09 16:17 ` Pip Cet
2021-04-09 16:35 ` Thierry Volpiatto
2021-04-09 18:57 ` Eli Zaretskii
2021-04-10 5:39 ` Thierry Volpiatto
2021-04-09 17:12 ` Jens C. Jensen
2021-04-09 18:53 ` Stefan Monnier
2021-04-09 18:59 ` Jens C. Jensen
2021-04-09 22:43 ` Stefan Monnier
2021-04-10 8:45 ` Jens C. Jensen
2021-04-10 13:10 ` Stefan Monnier
2021-04-09 19:08 ` Andrea Corallo via Emacs development discussions.
2021-04-09 19:14 ` Eli Zaretskii
2021-04-10 0:07 ` Andy Moreton
2021-04-10 7:23 ` Eli Zaretskii
2021-04-10 11:40 ` Andy Moreton
2021-04-09 18:09 ` Sujith Manoharan
2021-04-09 18:50 ` Eli Zaretskii
2021-04-09 18:27 ` Alex Bennée
2021-04-09 18:48 ` Andrea Corallo via Emacs development discussions.
2021-04-14 4:39 ` Pankaj Jangid
2021-04-14 6:31 ` Eli Zaretskii
2021-04-14 9:45 ` Philip Kaludercic
2021-04-14 10:14 ` Andrea Corallo via Emacs development discussions.
2021-04-14 10:35 ` Philip Kaludercic
2021-04-14 10:45 ` Eli Zaretskii
2021-04-14 10:49 ` Eli Zaretskii
2021-04-14 12:57 ` Philip Kaludercic
2021-04-14 13:10 ` Eli Zaretskii
2021-04-14 14:00 ` Philip Kaludercic
2021-04-14 14:35 ` Stefan Kangas
2021-04-14 14:42 ` Philip Kaludercic
2021-04-14 14:50 ` Stefan Monnier
2021-04-14 15:02 ` Eli Zaretskii
2021-04-14 14:37 ` Eli Zaretskii
2021-04-14 14:48 ` Dmitry Gutov
2021-04-14 17:10 ` Eli Zaretskii
2021-04-14 10:48 ` Andrea Corallo via Emacs development discussions.
2021-04-14 15:53 ` wilde
2021-04-14 17:02 ` Eli Zaretskii
2021-04-14 17:28 ` Alex Bennée
2021-04-14 17:41 ` Eli Zaretskii [this message]
2021-04-15 11:15 ` Alex Bennée
2021-04-14 18:07 ` Andrea Corallo via Emacs development discussions.
2021-04-14 20:23 ` Stefan Kangas
2021-04-14 22:01 ` Andrea Corallo via Emacs development discussions.
2021-04-15 9:25 ` wilde
2021-04-15 11:19 ` wilde
2021-04-15 16:23 ` Andrea Corallo via Emacs development discussions.
2021-04-27 16:25 ` wilde
2021-04-28 3:06 ` Corwin Brust
2021-04-28 17:52 ` Jose E. Marchesi
2021-04-29 8:20 ` Arthur Miller
2021-04-22 10:09 ` wilde
2021-04-22 11:14 ` Eli Zaretskii
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