s.  (This appears to be true only on PA-RISC.  If your architecture
has more than one stack per thread, and is not already supported, you will
need to do more work.  Grep for "IA64" in the source for an example.)
<DT><TT>STACKBOTTOM</tt>
<DD>
Defined to be the cool end of the stack, which is usually the
highest address in the stack.  It must bound the region of the
stack that contains pointers into the GC heap.  With thread support,
this must be the cold end of the main stack, which typically
cannot be foun