/* --------------------------------------------------
   Show actions of both prelude and postlude

   f( ): has 2 int parameters and 3 int local vars
   g( ): has 3 int parameters and 2 int local vars
   -------------------------------------------------- */

        .global main, Stop, CodeEnd, DataStart, DataEnd

	.global f, g

/* --------------------------------------------------
   Begin of the program instructions
   -------------------------------------------------- */
	.text
main:
       	mov   r0, #222    // Pass 222 as parameter 2 on stack
	push  {r0}
       	mov   r0, #111    // Pass 111 as parameter 1 on stack
	push  {r0}

       	bl    f            // Use step-in to call function f             
	add   sp, sp, #8   // De-allocate 2 int parameters

       	nop      
       	nop


/* ==============================================
   Function f: param and locals in stack
   ============================================== */
f:
	/* ****************************************
	   Prelude: build stack frame
	   **************************************** */
	push	{lr}	        // Save return address in LR
	push	{fp}	        // Save Frame Pointer in FP
	mov	fp, sp	        // Initialize my own FP
	sub	sp, sp, #12     // I create 3 local variable in stack

	/* BODY of function f */
       	nop                     // These instructions in f( ) can use stack
       	nop		        // to access parameters and local variables


       	mov   r0, #555    // Pass 555 as parameter 3 on stack
	push  {r0}
       	mov   r0, #444    // Pass 444 as parameter 2 on stack
	push  {r0}
       	mov   r0, #333    // Pass 333 as parameter 1 on stack
	push  {r0}

       	bl    g            // Use step-in to call function g
  	add   sp, sp, #12  // De-allocate 3 int parameters

       	nop		        
       	nop		        

	/* ****************************************
	   Postlude: tear down stack frame
	   **************************************** */
   	mov   sp, fp
	pop   {fp}
	pop   {pc}

/* ==============================================
   Function g: param and locals in stack
   ============================================== */
g:
	/* ****************************************
	   Prelude: build stack frame
	   **************************************** */
	push	{lr}	        // Save return address in LR
	push	{fp}	        // Save Frame Pointer in FP
	mov	fp, sp	        // Initialize my own FP
	sub	sp, sp, #8      // I create 2 local variable in stack

	/* BODY of function g */
       	nop                     // These instructions in f( ) can use stack
       	nop		        // to access parameters and local variables

        /* ****************************************
           Postlude: tear down stack frame
           **************************************** */
        mov   sp, fp
        pop   {fp}
        pop   {pc}




CodeEnd:
Stop:
    	nop

/* --------------------------------------------------
   Begin of the permanent program variables
   -------------------------------------------------- */
	.data
DataStart:

DataEnd:

	.end