Kldstat command

On FreeBSD, you can use kldstat command to display the status of any files dynamically linked into the kernel: 

  1. # kldstat
  2. Id Refs Address            Size     Name
  3.  1    6 0xffffffff80200000 17bc6a8  kernel
  4.  2    1 0xffffffff81a11000 56c6     fdescfs.ko
  5.  3    1 0xffffffff81a17000 2ba8     uhid.ko

If you want more detailed info, you can use -v option: 

  1. # kldstat -v
  2. Id Refs Address            Size     Name
  3.  1    6 0xffffffff80200000 17bc6a8  kernel (/boot/kernel/kernel)
  4.  Contains modules:
  5.   Id Name
  6.   386 if_lo
  7.   398 newreno
  8.   373 elf32
  9.   372 elf64
  10.   374 shell
  11. .....

Reference:
KLDSTAT(8)).