Re: Solaris dldump

[Eli Zaretskii <eliz@gnu.org>]

> Date: Mon, 19 Aug 2024 13:46:11 +0000
> From: Pip Cet <pipcet@protonmail.com>
> Cc: luangruo@yahoo.com, stefankangas@gmail.com, ali_gnu2@emvision.com, emacs-devel@gnu.org
> 
> I've just gone through configure.ac removing all the code that depends
> on unexec (no doubt I've missed some), and I must say I now agree it is
> time for unexec to go.  In particular, it had so far escaped my
> attention that it's incompatible with native compilation!

All the major new feature don't support unexec; native-compilation was
just the first.

> And while I am skeptical of the value of ASLR, it wuold be really
> embarrassing to run into a security issue that's exploitable only
> because Emacs disables ASLR for unexec builds.

We disable ASLR only during the build, AFAIR, not when we run the
dumped Emacs.

> >> DOS in particular is what triggered my question: given the limitations
> >> of DOS systems, it's quite possible temacs-as-emacs just wouldn't fly on
> >> those machines.
> >
> > Those limitations are not relevant in our case.
> 
> I think it's relevant whether DOS will become completely unusable or
> merely difficult to use once unexec is removed, and what can be done to
> fix it.

I was talking specifically about running temacs.

> Does the DOS port work on free DOS clones?

Yes, AFAIK (although I myself only run the DOS port on Windows for
many years now).

> And is there a way to gain access to a Solaris machine to fix
> pdumper on it?

No idea, perhaps Po Lu does.