linux console mode hello, world in assembly

makefile.linux

probe: probe.o makefile.linux
   ld -o probe -e probe probe.o

probe.o: probe.asm makefile.linux
   nasm -o probe.o -felf32 probe.asm

clean:
   rm -f probe.o probe

probe.asm

global probe

section .text
   probe:
   push ebp
   mov ebp, esp
   sub esp, 4

   mov eax, 4
   mov ebx, 1
   mov ecx, msg
   mov edx, msgLen
   int 0x80 ; write

   mov eax, 3
   xor ebx, ebx
   mov ecx, esp
   mov edx, 4
   int 0x80 ; read

   mov eax, 1
   xor ebx, ebx
   int 0x80 ; exit

section .rodata
   msg: db 'hello, world', 10, 0
   msgLen: equ $-msg