Ok this is how I see it.
For this example call is simply like a method or function that
executes some code and returns.
For a static language runtime program (C, or CLR etc) a call
site is essentially where a function call takes place. It's the
location that the call will return to in a normal (non exceptional)
flow. Since this is a static program the call site is simply a
memory location, pushed on the stack.
For a dynamic language program (Ruby, Python, etc) , the code
you are calling is not worked out until runtime. This means that
some form of logic is needed to manage the process of making the
correct function call and then cleaning up after the call (if
needed). If the dynamic language program is on .NET 4 this
is done using dlr (dynamic language runtime) objects of type
System.Runtime.CompilerServices.CallSite. So the call will return
to a method within the CallSite object and then on to location of
the original call.
Prin urmare, răspunsul este că depinde de modul în care faceți
apelul și, prin urmare, de ce platformă folosiți.