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

Jesse Allen the3dfxdude at
Sat Apr 22 12:43:41 CDT 2006

On 4/22/06, Mike Hearn <mike at> 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?
> >
> 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?


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