Function Prologue and Epilogue

Your Task

Implement complete function calling code generation.

Requirements

1. Generate function prologue:

   • Save old base pointer
   • Set up new base pointer
   • Reserve space for local variables
   • Save callee-saved registers if used

2. Generate function epilogue:

   • Restore callee-saved registers
   • Restore stack pointer
   • Restore base pointer
   • Return to caller

3. Handle function calls (caller side):

   • Push arguments right-to-left
   • Call the function
   • Clean up arguments from stack
   • Handle return value in eax

4. Handle parameters (callee side):

   • Access parameters via positive offsets from ebp
   • First argument at [ebp + 8]
   • Second argument at [ebp + 12], etc.

5. Handle local variables:

   • Calculate total space needed
   • Access via negative offsets from ebp

Success Criteria

• Functions can call other functions
• Recursive functions work correctly
• Parameters are passed correctly
• Local variables are accessible
• Return values work properly