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AREA Example, CODE, READONLY ; name this block of code
ENTRY ; mark first instruction
; to execute
start
MOV r0, #15 ; Set up parameters
MOV r1, #20
BL firstfunc ; Call subroutine
SWI 0x11 ; terminate
firstfunc ; Subroutine firstfunc
ADD r0, r0, r1 ; r0 = r0 + r1
MOV pc, lr ; Return from subroutine
; with result in r0
END ; mark end of file
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