.global main, Stop, CodeEnd
	.global DataStart, DataEnd


	.text
main:
	movw	r0, #:lower16:k
	movt	r0, #:upper16:k	// r0 = addr of var k

	push	{r0}		// Pass the addr of var k
	bl	f
	add	sp, sp, #4


Stop:
CodeEnd:
    	nop

f:
	push	{lr}
	push	{fp}
	mov	fp, sp
	sub	sp, sp, #0

	// x = x + 1
	ldr	r0, [fp, #8]	// r0 = addr of the var x that I need to read
	ldr	r0, [r0]	// r0 = value of the var x
	add	r0, r0, #1

	ldr	r1, [fp, #8]	// r1 = address of var x that I need to update
	str 	r0, [r1]


	mov	sp, fp
	pop 	{fp}
	pop	{pc}

/* --------------------------------------------------
   Begin of the permanent program variables
   -------------------------------------------------- */
	.data
DataStart:
k:	.4byte 7

DataEnd:

	.end