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

[Alistair John Strachan]

Hi,

Just a heads up that WINE seems to suffer from breakage if executed as a 32bit 
binary on an x86-64 kernel as of 2.6.17-rc, because (according to Andi Kleen) 
i386 NX is now enabled by default, and on x86-64 i386 behaves like a PAE 
enabled i386 kernel when performing IA32 emulation.

I've attached the entire thread for reference, as unfortunately I do not have 
the time to debug this problem, but thought that probably one of you would 
like to know.

Thread is also available to read here:

http://lkml.org/lkml/2006/4/21/99

Andi suspects that WINE is not making one of its mappings PROT_EXEC which 
causes a fault with NX enabled.