Please Segmentation fault

section .data
	msg: db 'hello, World!',10

section .text
	global _main
_main:
	mov eax, 4
	mov ebx,1
	mov ecx,msg
	int 0x80
	mov eax,1
	mov ebx,0
	int 0x80

nasm -f elf helloworld.asm
ld -s -o hello helloworld.o