; CFG example
bits 64

    SECTION .data
; empty

    SECTION .text
global _start
_start:

    mov     rbx, 0
    test    rbx, rbx
    jz      newBB1
    mov     rbx, 0
newBB1:
    jmp     return
    mov     rax, 0xdeadc0de

return:
    ; sys_exit(42)
    mov     rdi,rax ; system call return value
    mov     rax,60  ; system call number (sys_exit)
    syscall