README.md

Shebang for Assembler

All the credits go to: iximeow (aka pipeline staller)

See the thread for details.

• Compile nasm-stub.rs

  rustc nasm-stub.rs

• Install it as /usr/local/bin/nasm-stub

  cp nasm-stub /usr/local/bin/

• Install binfmt handler

  cp nasm.conf /etc/binfmt.d/

  Note that we install the compiled stub as the handler for ;x08#!

  head -c 4 helloworld.asm | hd
  00000000  3b 08 23 21                                       |;.#!|
  00000004

• Activate handler

  systemctl restart systemd-binfmt.service

• Play

  ./helloworld

helloworld

;#!nasm

BITS 64

section .text
global _start

_start:
	mov rax, 1	; sys_write
	mov rdi, 1
	lea rsi, [rel msg]
	mov rdx, 15	; "Hello, World!" + newline (0x0a) + null termination
	syscall
	mov rax, 60	; sys_exit
	mov rdi, 0
	syscall

msg:
	db "Hello, World!", 0x0a

; vim: ft=nasm

nasm-stub

nasm-stub.rs

nasm.conf