Jelly Bean になった Xperia P さんの root をずっと放置してたんですが、Bootloaderをunlockしないやり方があるみたいなので紹介。

面倒くさいけどデータも保持してDRMも消さない方法。試してないです。

http://talk.sonymobile.com/thread/132476?start=0&tstart=0

ICSでroot取ってOTA Rootkeeper入れてからアップグレード。ICSのROMを焼いた時点でBoorloaderをrelockすればDRMも復活。
https://play.google.com/store/apps/details?id=org.projectvoodoo.otarootkeeper&hl=ja

ワンクリック。
http://waledacdroid.blogspot.jp/2013/06/how-to-root-xperia-p-xperia-go-on-412.html

ワンクリックの紹介だけやっとけって話しだな。

USBデバッグにチェックを入れて、runme_win.batを実行したらrootになってます。
ログ置いときますね。

---------------------------------------------------------------
             Easy Rooting toolkit (v16.0)
                   created by DooMLoRD
                   "pref_event exploit"
   Credits go to all those involved in making this possible!
---------------------------------------------------------------
  Special thanks to: the_laser, Bin4ry, fi01, hiikezoe, [NUT]
  and to all those who are contributing to our git tree!
       Sources: https://github.com/android-rooting-tools
---------------------------------------------------------------
 [*] This script will:
     (1) root ur device using the pref_event exploit
     (2) install Busybox
     (3) install SU files
 [*] Before u begin:
     (1) make sure u have installed adb drivers for ur device
     (2) enable "USB DEBUGGING"
           from (Menu\Settings\Developer Options)
     (3) enable "UNKNOWN SOURCES"
           from (Menu\Settings\Security)
     (4) connect USB cable to PHONE and then connect to PC
     (5) skip "PC Companion Software" prompt on device
---------------------------------------------------------------
 CONFIRM ALL THE ABOVE THEN
続行するには何かキーを押してください . . .
--- STARTING ----
--- WAITING FOR DEVICE
* daemon not running. starting it now *
* daemon started successfully *
--- creating temporary directory
mkdir failed for tmp, File exists
--- cleaning
--- pushing files
159 KB/s (326 bytes in 0.002s)
770 KB/s (1578 bytes in 0.002s)
4274 KB/s (26268 bytes in 0.006s)
5142 KB/s (853044 bytes in 0.162s)
5222 KB/s (96260 bytes in 0.018s)
4330 KB/s (1858064 bytes in 0.419s)
--- DooMing device!
--- Correcting permissions
--- Running exploit



run_root_shell v6.0

Based on pref_event exploit

Modified for auto-rooting by DooMLoRD

Part of Easy Rooting Toolkit

Devices Supported:

Xperia Z       (C6602/3)    - 10.1.1.A.1.253/307

Xperia Z       (C6602/3)    - 10.3.A.0.423

Xperia ZL      (C6502/3/6)  - 10.3.A.0.423

Tablet Z       (SGP321)     - 10.1.1.A.1.307

Tablet Z       (SGP311/2)   - 10.1.C.0.370

Xperia ZR      (C5502/3)    - 10.1.1.A.1.310

Xperia SP      (C5302/3/6)  - 12.0.A.1.211/257/284

Xperia T       (LT30p)      - 9.1.A.1.141/142

Xperia TX      (LT29i)      - 9.1.B.1.67

Xperia V       (LT25i)      - 9.1.A.1.140/142/145

Xperia S       (LT26i)      - 6.2.B.0.200/211

Xperia SL      (LT26ii)     - 6.2.B.0.211

Xperia Acro S  (LT26w)      - 6.2.B.0.200/211

Xperia Ion     (LT28h)      - 6.2.B.0.211

Xperia P       (LT22i)      - 6.2.A.1.100

Xperia Go      (ST27i/a)    - 6.2.A.1.100

Xperia AX      (SO-01E)     - 9.1.C.0.473

Xperia Z       (SO-02E)     - 10.1.D.0.343

Tablet Z       (SO-03E)     - 10.1.E.0.265/269

Xperia GX      (SO-04D)     - 7.0.D.1.137

Xperia A       (SO-04E)     - 10.1.1.D.0.179

Xperia A       (SO-04E)     - 10.1.1.D.2.26

Xperia SX      (SO-05D)     - 7.0.D.1.137

Xperia SX      (SO-05D)     - 9.1.C.0.475

Xperia VL      (SOL21)      - 9.0.F.0.226

Xperia VL      (SOL21)      - 9.1.D.0.395/401

Xperia UL      (SOL22)      - 10.2.F.3.43

Google Nexus 4              - JDQ39

Google Nexus                - JOP40C/JZO54K

LG Optimus G E975           - v10e



Changelog is posted here: http://bit.ly/ert_log



Device detected: LT22i (6.2.A.1.100)

Attempt perf_swevent exploit...

writing address is 8e49

Launching auto-root script!

---------------------------------------------------------------

Launching final rooting process...

---------------------------------------------------------------

--- Rooting!

--- Remounting rootfs

--- Killing RIC service (specific for new Xperia devices)

Unable to chmod /system/bin/ric: No such file or directory

Unable to chmod /sbin/ric: No such file or directory

--- Installing busybox

--- Remounting /system

--- copying busybox to /system/xbin/

1666+1 records in

1666+1 records out

853044 bytes transferred in 0.048 secs (17771750 bytes/sec)

--- correcting ownership

--- correcting permissions

--- installing busybox

--- pushing SU binary

rm failed for /system/xbin/su, No such file or directory

188+1 records in

188+1 records out

96260 bytes transferred in 0.007 secs (13751428 bytes/sec)

--- correcting ownership

--- correcting permissions

--- correcting symlinks

rm failed for /system/bin/su, No such file or directory

--- pushing Superuser app

3629+1 records in

3629+1 records out

1858064 bytes transferred in 0.216 secs (8602148 bytes/sec)

--- correcting permissions

--- DONE!

--- cleaning

--- Please wait device is now rebooting

ALL DONE!!!

続行するには何かキーを押してください . . .