raspi-keygen
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nucular
How to patch the latest version of start.elf?
Hello,
How to patch the latest version of start.elf?
Pls help us out. Thanks.
in /boot/start.elf and /boot/start_x.elf search for 47E933363248 after this hex string: if you have 3C18 replace 18 with 1F if you have 1D18 replace 18 with 1F
YOU are the man!
I tried and diff'ed for several hours. This just works fine. (OpenELEC). Please commit this to the README otherwise other people will waste time as well.
@rapi3 Could you open a pull request? Edit: Ideally one that just updates the old patch instead of adding a new section for the "latest version"
To quote their page:
On the Raspberry Pi 4, the hardware codecs for MPEG2 or VC1 are permanently disabled and cannot be enabled even with a licence key; on the Pi 4, thanks to its increased processing power compared to earlier models, MPEG2 and VC1 can be decoded in software via applications such as VLC. Therefore, a hardware codec licence key is not needed if you're using a Pi 4.
in /boot/start.elf and /boot/start_x.elf search for 47E933363248 after this hex string: if you have 3C18 replace 18 with 1F if you have 1D18 replace 18 with 1F
what tool to use?
Last version this works on is Apr-15-2020: https://github.com/raspberrypi/firmware/tree/9e3c23ce779e8cf44c33d6a25bba249319207f68/boot
The latest files all show the following after the 47E933363248 string:
start.elf: 0918 start_x.elf: has two locations, 0090 and 1D18
Hopefully someone smarter than me will be able to make it work.
I wanted to try patching the latest binaries but sadly the IDA Pro plugin for VideoCore III/IV is outdated and only works on the quite old IDA 6 which I currently do not have.
Even more unfortunately, neither Ghidra nor radare2/rizin seem to have a VideoCore plugin either, so I am unable to look into this.
Might look into hunting down an old IDA version some time next week just to take a look, but no promises.
Last version this works on is Apr-15-2020: https://github.com/raspberrypi/firmware/tree/9e3c23ce779e8cf44c33d6a25bba249319207f68/boot
The latest files all show the following after the 47E933363248 string:
start.elf: 0918 start_x.elf: has two locations, 0090 and 1D18
Hopefully someone smarter than me will be able to make it work.
I'm trying to check this method with my rpi2 / rpi3 with Libreelec, still works. However OSMC is not working.
check my fork I updated patch for latest version 2022: LibreELEC (community): nightly-20220212-d9a07e9 (RPi2.arm) LE-rpi33:~ # vcgencmd codec_enabled MPG2 MPG2=enabled LE-rpi33:~ # vcgencmd codec_enabled WVC1 WVC1=enabled
https://github.com/rapi3/raspi-keygen
