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/Functions in Frame Pointers and Local Variables
Functions in Frame Pointers and Local Variables
Learn how the frame pointers are updated during function prolog and epilog.
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Function prolog
The sequence of instructions that initializes the %RBP register and makes room for local variables is called a function prolog. One example is pictured below, where func calls func2, which has one local variable var. Sometimes saving necessary registers is also considered part of a function prolog.
Raw stack (no local variables and function parameters)
Now we can understand additional data–the previous %RBP that was equal to the previous %RSP ...