section .text global _start ;must be declared for linker (ld) _start: ;tell linker entry point xor ebx,ebx ;ebx=0 mov ecx,msg ;address of message to write lea edx,[ebx+len] ;message length lea eax,[ebx+4] ;system call number (sys_write) inc ebx ;file descriptor (stdout) int 0x80 ;call kernel xor eax, eax ;set eax=0 inc eax ;system call number (sys_exit) int 0x80 ;call kernel section .rodata msg db 'Hello, world!',0xa ;our string len equ $ - msg ;length of our string