PROT_EXEC mmap/mprotect, i386 PAE + NX broken, x86-64 2.6.17-rc2

[Jesse Allen]

On 4/22/06, Mike Hearn <mike at plan99.net> wrote:
> On Sat, 22 Apr 2006 11:12:06 +0100, Alistair John Strachan wrote:
> > Well, I'm using a "modified" game executable which does not check for the
> > presence of a CD. However, it hooks into the original game executable so that
> > the game can validate itself. Alas, it's probably not the more pure win32
> > application known to man..
>
> Does it work if you use a legit copy?
>
> > http://devzero.co.uk/~alistair/wine/dump.log
>
> It appears to be the .iyhivx section, it's not marked MEM_EXECUTE and
> googling it shows people reporting backtraces with offsets just into it
> ... so looks like Marcus is correct.
>
> In which case this is really a Warcraft bug. But as NX is not really
> enforced on Windows I guess we need to fix this in Wine by always marking
> sections executable or something. Well it's easy to do but I dunno what AJ
> wants and he just went on holiday. For now just hack dlls/ntdll/loader.c
> to always mark sections as executable.
>
> thanks -mike
>
>
>
>

Doesn't Windows x86-64 enforce NX?

Jesse