Re: Anyone protecting the stack?

[Kip Macy <kmacy@xxxxxxxxxxx>]

Anything doing dynamic translation is going to need to generate and
execute code outside of its code segment. I don't know this for sure,
but probably even VMWare does this as there are a number of privileged
x86 instructions that don't trap. I would probably just make it 
controlled by a securelevel or sysctl. How many people want to run java
on a locked down machine? Those select few could just disable it at
kernel configure time.

                              -Kip

> > 	... I am understanding right and per the research I have done
> > 	previously on non-exec stacks, it seems JIT compilers and the
> > 	new Perl interpreter do not support this, although, I maybe a
> > 	little outdated on this information.
>
>
> J2SE 1.3.1 with the HotSpot compiler does create executable code objects
> that are managed on the machine the stack. For what ? I don't remember.
>
>
> > 	If it can be done without harming any functionality, it will be
> > 	great!
>
>
> I'm sure something can be worked out that'll allow this to be compatible
> with Java and heavy duty JIT compilers like that.
>
> bill