Access to graphics memory mappings on upcoming WOW64 implementation

[Zebediah Figura]

>> - Crazy idea: On Linux, parse /proc/self/maps to allow remapping 
>> non-anonymous pages. Combined with mremap(2) or manual emulation, this 
>> allows mapping everything except for shared anonymous pages [and I 
>> can't imagine that a GPU driver would use those, especially given that 
>> the only way to make use of the SHARED flag is fork(2)].
> Would this still work if the driver closed the FD after mmap-ing it?

Yes, procfs still displays the mapping in that case. Note that what's 
listed is the path (and inode), so we would reopen the path and then map it.