參考資訊：
http://kerseykyle.com/articles/ARM-assembly-hello-world
https://github.com/kevinhooke/learning-arm-asm/blob/master/helloworld.s
https://chromium.googlesource.com/chromiumos/docs/+/HEAD/constants/syscalls.md
main.s
.global _start
.data
msg: .ascii "hello, world!\n"
len = . - msg
.text
_start:
mov r7, #4
mov r0, #1
ldr r1, =msg
ldr r2, =len
swi 0
mov r7, #1
mov r0, #0
swi 0
| NR | syscall name | r7 | arg0(r0) | arg1(r1) | arg2(r2) |
|---|---|---|---|---|---|
| 1 | exit | 1 | int error_code | ||
| 4 | write | 4 | unsigned int fd | const char *buf | size_t count |
編譯、執行
$ arm-linux-gnueabihf-gcc main.s -o main -nostdlib -static
$ qemu-arm ./main
hello, world!