Here is my Windows, Linux and Mac OSX script to grab the TA partition from Sony devices and deploy full root (superuser + reboot script):
https://mega.co.nz/#!jRB1FBJT!RKIi13...gc0bIlYONcSfZQ [Update, v11]
1. Be on a firmware earlier than .402
1. Extract exploit.tar.gz and run ./root.sh (Linux) or root.bat (Windows)
2. Follow the instructions and your TA.img will be given and su will be deployed.
This disables SELinux, takes out sony_ric and then deploys su to /system/xbin/su
This works on ALL Sony Android mobile phones.
This can be run on any operating system.
Survives reboots [thanks to chargemon by DooMLoRD]