extern puts extern printf default rel %include "../inc/length_func.inc" section .rodata format db "%#d", 10, 0 section .data text db "rEE",0 testasd dq 0 section .text global main main: sub rsp, 8 ;enter mov r8, text call length_func mov [testasd], rax mov rsi, [testasd] lea rdi, [rel format] xor eax, eax ; AL=0 no FP args in XMM regs call printf _end: add rsp, 8 ;exit ret