Wine 32-bit address space

[Nick Burns]

According to
    http://msdn2.microsoft.com/en-gb/library/aa366912.aspx

The range 3GB (0xC0000000) - 4GB (0xFFFFFFFF) is considered system memory 
and apps should not write here (not sure why you would want to read from 
there either).

But Wine tries to mmap this range (on Mac OSX at least)

I was wondering why this is?
Should this range just be left as it is? -- is there a reason to mmap this 
range?

Any ideas?

for reference -- this mmap is spurred from libs/wine/mmap.c:356 (mmap_init)

- Nick