Getting a little further with this. Examining the m5.debug coredump with
TotalView (which I've found is much nicer than gdb/ddd for debugging
C++), the address which is causing problems is 0x1416e0000 which is
exactly the same as brk_point, the "top of the data segment". I guess
this leaves two options:

1) The CPU is on the correct path and the address is being
flagged as invalid wrongly. Maybe the comparison for validDataAddr in
process.hh ought to be <= brk_point rather than < brk_point

2) The CPU is misspeculating and this isn't being picked up.

For simplicity's sake, I hope the former is true but I suspect that
brk_point is strictly exclusive so it's more likely the latter. Any
thoughts?

Thanks,

James

-- 
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http://www.cl.cam.ac.uk/~jrs53/


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