➕Add callee rules function

An example function that follows the callee rules

Assembler Intel Code/callee_rules.asm

@@ -0,0 +1,31 @@
+.486
+.MODEL FLAT
+.CODE
+PUBLIC _myFunc
+	_myFunc PROC
+		; Subroutine Prologue
+		push ebp     ; Save the old base pointer value.
+		mov ebp, esp ; Set the new base pointer value.
+		sub esp, 4   ; Make room for one 4-byte local variable.
+		push edi     ; Save the values of registers that the function
+		push esi     ; will modify. This function uses EDI and ESI.
+		; (no need to save EBX, EBP, or ESP)
+
+		; Subroutine Body
+		mov eax, [ebp+8]   ; Move value of parameter 1 into EAX
+		mov esi, [ebp+12]  ; Move value of parameter 2 into ESI
+		mov edi, [ebp+16]  ; Move value of parameter 3 into EDI
+
+		mov [ebp-4], edi   ; Move EDI into the local variable
+		add [ebp-4], esi   ; Add ESI into the local variable
+		add eax, [ebp-4]   ; Add the contents of the local variable
+						 ; into EAX (final result)
+
+		; Subroutine Epilogue 
+		pop esi      ; Recover register values
+		pop  edi
+		mov esp, ebp ; Deallocate local variables
+		pop ebp ; Restore the caller's base pointer value
+		ret
+	_myFunc ENDP
+END