[Qemu-devel] another 64/32 mmap() bug

[Vince Weaver]

In trying to get the remaining spec2k/spec2k6 benchmarks to run, I've 
found another 64-bit/32-bit mmap() linux-user problem.

This could be a kernel problem.

The mmap() call in conjunction with MAP_32BIT will make sure the address 
of an allocation is < 32-bit.  The problem is it doesn't check that the
_entire address range_ is < 32-bit.

So it will return an address of say 0xffff0000 for an allocation of
128kB, and the end of that allocation will not be addressable, causing 
a segfault.

Vince