malc writes: >> > 2) instrumentation: a set of generic macros that signal events that might >> > be >> > of >> > interest. >> >> Etc. >> >> In the context of another simulator, we developed a different >> technique, which would be quite general and might be of interest >> for QEMU. We communicate with the simulator via a "fake" *device*, >> mapped into user-mode memory using an mmap call. If someone >> devised and coded such a device, then it could be used from any >> guest.
> I'v done something similar a while ago: > http://repo.or.cz/w/qemu/malc.git/shortlog/refs/heads/wctpci Ah, although somewhat heavier, this is much more clever and generic :) My only concern is on the need of running as root to mmap /dev/mem, but I could write a dumb character device that can be mmaped by everybody. Lluis -- "And it's much the same thing with knowledge, for whenever you learn something new, the whole world becomes that much richer." -- The Princess of Pure Reason, as told by Norton Juster in The Phantom Tollbooth
