5.3.4. Return Operations Implementation

Try these first

1. 1.

   What does the stack pointer do during a procedure call?

   Hint

   Think of it as a tracker of where the last item was stored.

2. 2.

   Name the first action taken during a procedure call.

   Hint

   What comes first in the SCR framework?

3. 3.

   What happens when a procedure is called?

   • Context is saved
   • Registers are cleared
   • Program execution halts

   Hint

   Think of SCR.

4. 4.

   True or False: The stack pointer increments when pushing values to the stack.

   • True
   • False

   Hint

   Remember how stacks work!

5. 5.

   Consider a scenario where a procedure A calls procedure B, which then calls procedure C. Describe how values are saved and restored at each step.

   Hint

   Think through the layers of context that need to be maintained.

6. 6.

   If an error occurs before the return instruction in Procedure A is executed, explain the potential consequences.

   Hint

   Consider what happens when context isn't properly handled.