ELF object files: executable stack and security risk?

[Walter Bright]

On 7/26/2011 6:45 PM, Marco Leise wrote:
> I'm not into the details of ELF and object file stacks, but Gentoo Linux gives
> me some QA warnings about executable writable sections. A Gentoo hacker helped
> me by writing a patch to dmd and the security warnings are now gone.
>
> See http://d.puremagic.com/issues/show_bug.cgi?id=6387 for details.
>
> I posted here to shed some light on the issue. GNU C closures need an executable
> stack, but D doesn't. Would there be any other feature that require executable
> stacks?

Not at the moment.

> If yes, then an option to disable these features and make the stacks
> non-executable would help. And why is it anyway that each object file has a
> stack of it's own? I thought stacks were a per-thread thing?

Object files don't have their own stacks. I don't know what you're referring to.