The module system seems to have problems with modules with a large BSS
segment (i.e. I get a vm fault when loading one of these, but
initialising the data causes the problem to go away).  A quick look at
modload.c showed that the size of the module appeared to be calculated
from code size + data size, with no reference to bss.

Sorry for the vagueness of this bug report, but I didn't have time to
do any more exploring, and I won't have a net connection for the next
two weeks.

Cheers,
	Simon

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