- "Kevin P. Lawton" <[EMAIL PROTECTED]>: Thu Apr 26 18:00:12 EDT 2001
More work on dt-testbed/proto4. Implemented reverse address lookup
table (tcode address to instruction address) capability. This is
needed for proper exception handling when the code is integrated
into the real VM environment.
Next, I'm going to do some more instrumentation and analysis of the
storage efficiencies of the constructs which are used to store
tcode and the forward and reverse lookup tables.
Some analysis and tweaking should prove useful. Then on to
tying up some loose ends (stuff I marked with '+++' in the code),
then moving on to integration of prototype into the main code.
I need to update the Plex86 Interals Guide to reflect some of
the details and changes I've made. But I'm going to wait until
I get things tweaked first.
Implementing the storage and lookup structures for a DT (dynamic translation)
technique (even this brain-dead quasi-DT, only translate a limited set of
instructions) is quite a balancing act of efficiencies of storage space
and access time etc. And making it work well in a page-centric way
so that translated code can be cached, and efficiently invalidated/revalidated
across context switches in the guest OS. And...
Good stuff. Can't wait to get to integration.
-Kevin
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Kevin Lawton [EMAIL PROTECTED]
MandrakeSoft, Inc. Plex86 developer
http://www.linux-mandrake.com/ http://www.plex86.org/
