DWARF-based Stack Walking Using eBPF

To walk the stack with this method, we need to keep a pointer to the previous frame. In the x86 architecture, this typically would be in the frame pointer, `$rbp`. As functions may call other functions, this register has to be stored on function entry and restored on function exit. This is accomplished by the so-called function prologue, on function entry, which might look like this push $rbp # sa