On a guest VM:

> # cat /sys/module/dm_crypt/sections/{.text,.data}
> 0xffffffffa049f000
> 0xffffffffa04a4000

Debugger:

> (gdb) add-symbol-file drivers/md/dm-crypt.ko 0xffffffffa049f000 -s .data 0xffffffffa04a4000
> add symbol table from file "drivers/md/dm-crypt.ko" at
>         .text_addr = 0xffffffffa049f000
>         .data_addr = 0xffffffffa04a4000
> (y or n) y
> Reading symbols from drivers/md/dm-crypt.ko...done.
> (gdb) p crypt_target.version
> $1 = {1, 15, 0}
> (gdb) info addr crypt_target
> Symbol "crypt_target" is static storage at address 0xffffffffa04a4020.
> (gdb) info addr dm_crypt_exit
> Symbol "dm_crypt_exit" is a function at address 0x4e.
> (gdb) b dm_crypt_exit
> Cannot access memory at address 0x4e