1; nasm -f elf hello.asm # this will produce hello.o ELF object file 2; ld -s -o hello hello.o # this will produce hello executable 3 4section .text 5 global _start ;must be declared for linker (ld) 6 7_start: ;tell linker entry point 8 9 mov edx,len ;message length 10 mov ecx,msg ;message to write 11 mov ebx,1 ;file descriptor (stdout) 12 mov eax,4 ;system call number (sys_write) 13 int 0x80 ;call kernel 14 15 mov eax,1 ;system call number (sys_exit) 16 int 0x80 ;call kernel 17 18section .data 19 20msg db 'Hello, world!',0xa ;our dear string 21len equ $ - msg ;length of our dear string 22 23