https://jvns.ca/blog/2014/09/06/how-to-read-an-executable/
on my machine it is objdump -tT /usr/lib/libc-2.24.so not objdump -tT /lib/x86_64-linux-gnu/libc-2.15.so (https://jvns.ca/blog/2014/09/06/how-to-read-an-executable/)