GNU bug report logs - #23529
Request for fixing randomize_va_space build issues

Previous Next

Full log

Message #182 received at 23529 <at> debbugs.gnu.org (full text, mbox):

From: Philippe Vaucher <philippe.vaucher <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Philipp Stephani <p.stephani2 <at> gmail.com>, Paul Eggert <eggert <at> cs.ucla.edu>,
 23529 <at> debbugs.gnu.org
Subject: Re: bug#23529: Request for fixing randomize_va_space build issues
Date: Mon, 12 Sep 2016 16:10:47 +0200

On Mon, Sep 12, 2016 at 4:30 AM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>> From: Philippe Vaucher <philippe.vaucher <at> gmail.com>
>> Date: Sun, 11 Sep 2016 21:32:51 +0200
>> Cc: Paul Eggert <eggert <at> cs.ucla.edu>, Philipp Stephani <p.stephani2 <at> gmail.com>, 23529 <at> debbugs.gnu.org
>>
>> >>     What about disabling randomization for the temacs run?
>> >>
>> >> That is yet another low-level thing to configure, and to get right in new ports.
>> >
>> > We already have that in Emacs, don't we?
>>
>> That is exactly why I made the bug report 23529!
>>
>> Because Emacs does stuffs at build time that requires "high"
>> privileges (like the personality() syscall), one cannot build Emacs in
>> various restricted environments.
>>
>> Disabling randomization is exactly what we should get rid of, at least
>> at build time.
>
> Isn't it the other way around: the first priority is to enable
> randomization and all the other modern techniques for running the
> dumped Emacs?

Now you confuse me... let's start over: I'm saying that we should try
to make Emacs build fine wether there is address randomization or not
. There should not be "disable ASLR" hacks when building/dumping, like
there currently is.

Basically, Emacs should not require higher privileges than GCC, which
is currently not the case with all the personality() syscalls &
friends.

Now, maybe I missunderstood you when you said "What about disabling
randomization for the temacs run?". I understood that as "Why don't we
disable ASLR when temacs run?", which is exactly why Emacs has problem
building in restricted environments.

Philippe

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.