root@kali:~/ohm/pwd_asm#  nasm -f elf64 -o pwd_exec.o pwd_exec.asm
root@kali:~/ohm/pwd_asm#  ld pwd_exec.o -o pwd_exec
root@kali:~/ohm/code_exec# objdump -M intel -d pwd_exec | grep '^ ' | cut -f2 | perl -pe 's/(\w{2})\s+/\\x\1/g'
\x48\x31\xd2\x52\x48\xb8\x2f\x62\x69\x6e\x2f\x70\x77\x64\x50\x48\x89\xe7\x52\x57\x48\x89\xe6\x48\x8d\x42\x3b\x0f\x05
