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KLDSTAT(8) System Manager's Manual KLDSTAT(8)

kldstat — display status of dynamic kernel linker

kldstat [-h] [-q] [-v] [-d] [-i id] [-n filename]

kldstat [-q] [-d] [-m modname]

The kldstat utility displays the status of any files dynamically linked into the kernel.

The following options are available:

Display the size field in a human-readable form, using unit suffixes instead of hex values.
Be more verbose.
Show the module specific data (as int, unsigned int and unsigned long)
id
Display the status of only the file with this ID.
filename
Display the status of only the file with this filename.
Only check if file is loaded or compiled into the kernel.
modname
Display the status of only the module with this modname.

The kldstat utility exits 0 on success, and >0 if an error occurs.

Show files dynamically linked into the kernel. Note the kernel itself is shown in the list. shows the number of modules referenced by each file:

$ kldstat
Id Refs Address                Size Name
 1   38 0xffffffff80200000  2448f20 kernel
 2    3 0xffffffff82649000    b7bd8 linux.ko
 3    5 0xffffffff82701000     9698 linux_common.ko
 4    1 0xffffffff82b11000     1eae linsysfs.ko
 5    1 0xffffffff82b13000    f2af8 nvidia-modeset.ko
 6    1 0xffffffff82c06000  122b020 nvidia.ko
 7    1 0xffffffff83e32000     2668 intpm.ko
 8    1 0xffffffff83e35000      b50 smbus.ko
 9    1 0xffffffff83e36000     18a0 uhid.ko
10    1 0xffffffff83e38000     2928 ums.ko
11    1 0xffffffff83e3b000     1aa0 wmt.ko
12    1 0xffffffff83e3d000     cd70 snd_uaudio.ko

Show the verbose status of the file and show the size in a human readable fashion:

$ kldstat -h -v -n linux
Id Refs Address             Size Name
 2    3 0xffffffff82649000  735K linux.ko (/boot/kernel/linux.ko)
        Contains modules:
                 Id Name
                  2 linuxelf

Same as above using the of the file:

$ kldstat -h -i 2 -v
Id Refs Address             Size Name
 2    3 0xffffffff82649000  735K linux.ko (/boot/kernel/linux.ko)
        Contains modules:
                 Id Name
                  2 linuxelf

Show the status of the module obtained from the example above:

$ kldstat -v -m linuxelf
Id  Refs Name
  2    1 linuxelf

Show the module specific data for the module:

$ kldstat -d -m g_raid
Id  Refs Name data..(int, uint, ulong)
366    1 g_raid (0, 0, 0x0)

Check if the module is linked. Returns 0 if it is, 1 otherwise:

$ kldstat -q -n fakefile || echo file not linked
file not linked

kldstat(2), kldload(8), kldunload(8)

The kldstat utility first appeared in FreeBSD 3.0, replacing the lkm interface.

Doug Rabson <dfr@FreeBSD.org>

January 19, 2016 FreeBSD-13.0