x86asm-nasm, 272 bytes

Result

WA

Duration

532ms

Code [DL]

section .text
global _start

_start:                  
mov     edx,len  
mov     ecx,msg  
mov     ebx,1    
mov     eax,4    
int     0x80     

mov     eax,1    
int     0x80     

section .data

msg     db      'Hello, world!',0xa 
len     equ     $ - msg             

stdin

82 03 06
32 49 02
88 18 24
73 76 16

stdout

Hello, world!

stderr

strace