[Qemu-devel] Page protection and i386 cmpxchg8b

[Ilya Shar]

Hi, 

I'm running i386-darwin-usrer on i386 and some apps
(Safari browser) crash because cmpxchg8b attempts to
wrie to a qemu-allocated page which is readable but
write-protected.  When I comment out mprotect in
exec.c 

//        mprotect(g2h(page_addr),
qemu_host_page_size,
//                 (prot & PAGE_BITS) & ~PAGE_WRITE);

I can proceed further.  I would guess mprotect is
there for a reason so it doesn't seem like a good
solution, besides the runs get substantially slower
without mprotect.  Is there a solution to this problem
or a way to better understand what is going on? 

Thanks, 
Ilya 



 
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