SECTION .text

global _start

_start:

xor al, al ; strlen(esp + 4)

mov ecx, 255

mov edi, [esp + 4] ; edi now points to argv[0]

repnz scasb

mov byte [edi - 1], 0x0A ; replace terminating null with newline

mov edx, edi

mov ecx, [esp + 4] ; ecx now points to argv[0] + "\n"

sub edx, ecx ; edx is now strlen(esp + 4) + 1 (because newline)

mov eax, 4 ; sys_write 32-bit ABI

mov ebx, 1 ; to stdout

int 0x80

mov eax, 1 ; sys_exit 32-bit ABI

mov ebx, 0 ; no error

int 0x80