I've found some universities that are porting DynamoRIO (or something very similar) to Linux kernel space, but the code doesn't seem to be available. Is there a resource I am unaware of?
Here's an example.
Yes, there is DynamoRIO Kernel (DRK), which is a DynamoRIO (DR) port created by Peter Feiner at the University of Toronto (U of T). The current DR source tree; however, does not contain DRK, despite the existence of a branch. DRK has yet to be open sourced, and U of T is actively doing kernel DBT research using DRK and a new DBT framework.
If you are thinking of porting it yourself, the two main challenges are:
Recently, two new kernel instrumentation systems have been released, of which I am the creator of one: