@
@ Assembler program to print "Hello World!"
@ to stdout
@
@ R0-R2 - parameters to Linux function services
@ R7 - Linux function number
@

.global _start		@ Provide program starting
        			@ address to linker

@ Set up the parameters to print hello world
@ and then call Linux to do it.

_start: mov R0, #1	    @ 1 = StdOut
	ldr	R1, =helloworld	@ string to print
	mov	R2, #13	        @length of our string
	mov R7, #4	        @ Linux write system call
	svc	0	            @ Call Linux to print

@ Set up the parameters to exit the program
@ and then call Linux to do it.
	mov	R0, #0	        @ Use 0 return code
	mov	R7, #1	        @ Sevice command code 1
			            @ terminates the program
	svc	0	            @ Call Linux to terminate

.data
helloworld: 	.ascii	"Hello World!\n"