small ARM Linux executable

Makefile

all:
	gcc -pipe -nostdlib -nostartfiles -Qn -Wl,--build-id=none -o tiny-hello tiny-hello.s
	strip -R .ARM.attributes tiny-hello
	! ./tiny-hello
	ls -l tiny-hello

clean:
	rm -f tiny-hello

tiny-hello.s

.global _start

_start:
	mov r0, #1
	ldr r1, .L1
	mov r2, #14
	mov r7, #4
	swi #0

	mov r7, #1
	swi #0

.L1:
	.word .L2
.L2: .ascii "Hello, world!\n"