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Re: [Axiom-developer] Re: [Gcl-devel] [Re: Executable memory: further pr
From: |
Camm Maguire |
Subject: |
Re: [Axiom-developer] Re: [Gcl-devel] [Re: Executable memory: further programs that fail] |
Date: |
02 Dec 2003 12:13:10 -0500 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 |
Greetings!
root <address@hidden> writes:
> >Just wanted to point out here that a randomization of this magnitude,
> >even if gcl can work around it, could potentially result in a loss of
> >100M in usable memory on each save-system. I think axiom currently
> >uses about 4 of these. The default memory maximum for GCL is only
> >128M. Count me among the elders :-).
>
> Is there any way to get GCL to use all available memory? Fedora will
> let you address 4G so Roland doesn't understand why I cry about 100M.
>
Sure, --enable-maxpage should let you go as high as you want. I can't
imagine there not being serious performance issues, but I could be
mistaken.
> >If you recall, static linking was broken even without exec-shield. I
> >think if brk randomization remains at the above mentioned range, we
> >would probably fall back on Roland's linker script solution, if I
> >understand correctly.
>
> I don't understand Roland's linker solution.
>
Me either, but sounded promising :-).
> >OK, your understanding is considerably deeper than mine on this
> >issue. Even granting some security benefit, though, I don't see why
> >the range can't be quite small and still be effective. How long would
> >it take someone to guess a randomly generated address in even a 1k
> >range?
>
> The issue is the same at 1k vs 100M but the latter sounds so much more
> secure :-)
>
:-)
Take care,
> Tim
>
>
>
>
--
Camm Maguire address@hidden
==========================================================================
"The earth is but one country, and mankind its citizens." -- Baha'u'llah
- [Axiom-developer] Re: [Gcl-devel] [Re: Executable memory: further programs that fail], Camm Maguire, 2003/12/01
- Re: [Axiom-developer] Re: [Gcl-devel] [Re: Executable memory: further programs that fail], root, 2003/12/02
- Re: [Axiom-developer] Re: [Re: Executable memory: further programs that fail], Peter Simons, 2003/12/02
- Re: [Axiom-developer] Re: [Gcl-devel] [Re: Executable memory: further programs that fail], Camm Maguire, 2003/12/02
- Re: [Axiom-developer] Re: [Gcl-devel] [Re: Executable memory: further programs that fail], root, 2003/12/02
- Re: [Axiom-developer] Re: [Gcl-devel] [Re: Executable memory: further programs that fail], Camm Maguire, 2003/12/02
- Re: [Axiom-developer] Re: [Gcl-devel] [Re: Executable memory: further programs that fail], root, 2003/12/02
- Re: [Axiom-developer] Re: [Gcl-devel] [Re: Executable memory: further programs that fail], Camm Maguire, 2003/12/02