"Hello World" program in x64 assembly for macOs

README.md

References

• https://nasm.us/doc/nasmdoci.html
• https://stackoverflow.com/questions/31234395/why-use-rip-relative-addressing-in-nasm
• https://stackoverflow.com/questions/13091987/x64-nasm-pushing-memory-addresses-onto-the-stack-call-function
• https://gist.github.com/FiloSottile/7125822

hello.asm

        global _main
        section .text
_main:
  mov rax, 0x2000004    ; write
  mov rdi, 1            ; stdout
  lea rsi, [rel msg]
  mov rdx, msg.len
  syscall

  mov rax, 0x2000001    ; exit
  mov rdi, 0
  syscall

        section .data
msg:    db      "Hello, world!", 10
.len:   equ     $ - msg

Makefile

run: hello
	./hello

hello: hello.o
	ld -macosx_version_min 10.13.0 -lSystem -o hello hello.o

hello.o: hello.asm
	nasm -f macho64 hello.asm -o hello.o