Ok, I noticed that with a bit of hacking the snp device can be made loadable. Making it unloadable is a bit of a pain, but I can implement it using refcounting on the amount of ttys that have snp devices hooked onto them so that the machine doesn't panic if you unload it.

The 'problem' that happens is that kern/tty.c now needs to include snoop.h unconditionally, and it also has to provide some exernally visible pointers to functions for the loadable snoop device to hook into.

Basically, does anyone have a problem with snp becoming loadable before I commit to finishing off the work? (it's loadable now, but not unloadable).

thanks,

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