section .data ;section declaration msg db "Hello, world!",0xA ;our dear string len equ $ - msg ;length of our dear string section .text ;section declaration ;we must export the entry point to the ELF linker or global _start ;loader. They conventionally recognize _start as their ;entry point. Use ld -e foo to override the default. _start: ;write our string to stdout mov eax,4 ;system call number (sys_write) mov ebx,1 ;first argument: file handle (stdout) mov ecx,msg ;second argument: pointer to message to write mov edx,len ;third argument: message length int 0x80 ;call kernel ;and exit mov eax,1 ;system call number (sys_exit) xor ebx,ebx ;first syscall argument: exit code int 0x80 ;call kernel