UE55J5500 firmware dump

Ideas and dreaming will go this forum

flowswitch
Posts: 2
Joined: Tue May 31, 2016 8:51 am

UE55J5500 firmware dump

Post by flowswitch » Tue May 31, 2016 9:10 am

Our reckless team have dumped both SPI flash and eMMC from 55J5500. Here are some pieces (a full dump is too big, 4GB)
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flowswitch
Posts: 2
Joined: Tue May 31, 2016 8:51 am

Re: UE55J5500 firmware dump

Post by flowswitch » Tue May 31, 2016 9:35 am

W25Q40B SPI flash dump. It has reversed byte order in dwords. Looks like this is a complete firmware for some separate lightweight Cortex-M core. It listens to some simple commands on UART (connected to main CPU ?).

As far as I understand, the main multicore subsystem boots from eMMC boot partition directly.

There is a key for *.msd upgrade files in USB updater module, but it is encrypted via some hardware ("se" part of "demux" module in device tree).
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sectroyer
Official SamyGO Developer
Posts: 5765
Joined: Wed May 04, 2011 5:10 pm

Re: UE55J5500 firmware dump

Post by sectroyer » Tue May 31, 2016 9:37 am

Nice work. Check PM ;)
I do NOT support "latest fw" at ALL. If you have one you should block updates on router and wait for it to STOP being "latest":)
If you want me to help you please paste FULL log(s) to "spoiler"/"code" bbcodes or provide link(s) to pasted file(s) on http://ctrlv.it/ Otherwise "NO HELP"!!!
If you want root DISABLE internet access to your device!!!!
DO NOT EVER INSTALL FIRMWARE UPGRADE !!!!

ynon
Posts: 13
Joined: Fri Jan 29, 2016 8:16 am

Re: UE55J5500 firmware dump

Post by ynon » Tue Jan 10, 2017 1:16 am

The full dump should be very useful. Any ideas?
-ynon

Jegan
Posts: 3
Joined: Mon Jan 16, 2017 2:50 pm

Re: UE55J5500 firmware dump

Post by Jegan » Wed Jan 18, 2017 6:26 pm

J series pinout eMMC
UE32J5500AKXZT
Main: BN41-02353B
eMMC: THGBMBG5D1KBAIT
20170116_182938.jpg
20170116_182910.jpg
20170116_182859.jpg
20170115_171915.jpg
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