gdb works fine.

  (gdb) x/4x fns

0xffeaa0cc: 0x080485e4 0x08048640 0x0804869c 0x08048719

  (gdb) x run

0x804875b <run>: 0x83e58955

  (gdb) gdb) x/40x (void*)fns-0x40

etc.

You could also use objdump -d to decompile the binary.