debugging longman dictionary
weigand at immd1.informatik.uni-erlangen.de
Mon Mar 25 13:38:27 CST 2002
> what I'd do is:
> - simulate (as for DR?) the IDTR read/write (memory/instr)
> - provide our own interrupt table
> - then hook the signal catches to this table (dlls/ntdll/
> - in your case, especially the divide by 0 signal to entry 1 of this
> however, I don't think this is the best way to go. It will add lots of
> code to Wine (mainly i386 virtualization), and let programs modify
> they shouldn't normally need to touch.
Even if you did this, it probably wouldn't help much, as the
interrupt routine is supposed to be executed in ring 0 (which
presumably is the very *reason* the program does this nonsense).
So you'll fail immediately afterwards due to privilege
violations as the app does whatever it wants to do in ring 0 ...
Of course, you could add virtualization for all the ring 0 stuff,
but this is quite open-ended :-(
Dr. Ulrich Weigand
weigand at informatik.uni-erlangen.de
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