; Hello World Program ; Compile with: nasm -f elf64 helloworld64.asm ; Link with: ld -m elf_x86_64 helloworld64.o -o helloworld64 ; Run with: ./helloworld64 SECTION .data msg db 'Hello World!', 0Ah ; assign msg variable with your message string SECTION .text global _start _start: mov rax, 1 ; invoke SYS_WRITE mov rdi, 1 ; write to the STDOUT file (file descriptor) mov rsi, msg ; move the memory address of our message string into ecx mov rdx, 13 ; number of bytes to write - one for each letter plus 0Ah (line feed character) syscall mov rax, 60 ; invoke SYS_EXIT mov rdi, 0 ; return 0 status on exit - 'No Errors' syscall