PROT_EXEC mmap/mprotect, i386 PAE + NX broken, x86-64 2.6.17-rc2
Alistair John Strachan
s0348365 at sms.ed.ac.uk
Fri Apr 21 22:30:24 CDT 2006
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.
--
Cheers,
Alistair.
Third year Computer Science undergraduate.
1F2 55 South Clerk Street, Edinburgh, UK.
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