AREA RESET, DATA, READONLY
	EXPORT __Vectors
__Vectors
	DCD 0x10001000
	DCD Reset_Handler
	ALIGN
	
	AREA MYCODE, CODE, READONLY
	ENTRY
	EXPORT Reset_Handler

Reset_Handler
	LDR R1, =5
	BL fact
	LDR R12, =0x10001000
	STR R0, [R12] 
	
STOP
	B STOP

fact
	CMP R1, #1
	BLE base_case
	
	PUSH{R1, LR}
	SUB R1, R1, #1
	BL fact
	
	POP{R2, LR}
	MUL R0, R0, R2
	BX LR

base_case
	MOV R0, #1
	BX LR

	END