This necessitates the use of a copy of SWF data into the GC arena, along with unsafe (and possibly unsound) pointer manipulation to get the action reader to hold a GC pointer.
Implement the SetTarget2 action, which pops the target off of the
stack, and GetProperty 11, which pushes _target.
However, our implementation of _target is not accurate yet,
because it requires dynamically building the target path. Currently
we fake it by caching the last path to tellTarget.
The AVM1 contains an explicit "target clip" that is used for older
Flash 4-era actions. This target clip can be set to an invalid
value, at which point Play, Stop, etc. will fail silently.
For GetVariable and SetVariable, if the target is invalid,
the variables will be modified on root ("/").
David Wendt