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程式語言 - GNU - Assembly (ARM) - Hello, world!(swi, eabi)
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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | .global _start .datamsg: .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!