buffer stack

[Arthur Davis]

I spend a lot of time looking through code that spans many files and 
tracing call stacks as one function calls another which calls another 
....  I use cscope to help me navigate down through the code, but coming 
back up the call stack is a problem.  Is there a package that is able to 
keep a stack of locations (buffer and point in buffer) to make this task 
easier?

For instance: f1() in file A calls f2() in file B which calls f3() back 
in file A.  I'm looking for something that will allow me to pop back 
from f3() in file A to f2() in file B and then back to f1() in file A.

Any suggestions?

Arthur