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+--- Thread: upgrading u-boot--what version? where to get it? (/showthread.php?tid=19238)
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RE: upgrading u-boot--what version? where to get it? - Pavlos1 - 05-21-2024
(05-21-2024, 11:30 AM)bsammon Wrote:(05-21-2024, 12:28 AM)Pavlos1 Wrote: If you want to have multiple OSes installed on one boot device, I would install Tow-Boot to the SPI because it has a built-in boot selector.
Hah... yeah, it's Tow-Boot that started me down this path. The Tow-Boot install instructions (the ones I read) say it should be installed by creating a bootable-SDCard installer, and then booting from it. Guess what wouldn't boot with my 4-year-old u-boot?
If you're willing to take your PBP apart, you will find an eMMC-disable switch. If you flick that then it should boot normally from a Tow-Boot SD card. (i.e. It will use the bootloader on the SD card instead of trying to use the bootloader on your eMMC to boot the SD card.)
If not, a potential software workaround is to use the rk2aw installer from within your stock (i.e. installed to eMMC) OS, then power off the PBP and insert a Tow-Boot SD card. rk2aw will then automatically boot using the bootloader on the SD card, at which point you can use the Tow-Boot installer to overwrite the existing rk2aw install with Tow-Boot.
(05-21-2024, 11:30 AM)bsammon Wrote: Also, now that I finally have serial console set up, I see that u-boot (at least the version on my PBP) has a built-in boot selector as well.
Tow-Boot will give you a graphical selector (IIRC), so you don't have to plug in the serial adapter for every boot....
RE: upgrading u-boot--what version? where to get it? - wdt - 05-22-2024
If you know how to use dd , AND NOT SCREW-UP, is it not simpler to blank (dev/zero)
the uboot area on emmc? If uboot is not there, then it can't be loaded
DO make a backup of MBR and first 16M so you can restore as needed
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It is a bit tedious to type (in uboot terminal) boot_targets=mmc1 or whatever
every time you want to change defaults
RE: upgrading u-boot--what version? where to get it? - Tazdevl - 04-01-2025
What about https://www.bleepingcomputer.com/news/security/microsoft-uses-ai-to-find-flaws-in-grub2-u-boot-barebox-bootloaders/
This gives me a really good reason to update uboot
RE: upgrading u-boot--what version? where to get it? - KC9UDX - 04-01-2025
(04-01-2025, 07:53 AM)Tazdevl Wrote: What about https://www.bleepingcomputer.com/news/security/microsoft-uses-ai-to-find-flaws-in-grub2-u-boot-barebox-bootloaders/
This gives me a really good reason to update uboot
Without reading and understanding the code changes (for me, insurmountable at the current time) I don't trust Microsoft's recommendations, let alone Microsoft's AI's recommendations. What I have works.
RE: upgrading u-boot--what version? where to get it? - Tazdevl - 04-03-2025
https://www.heise.de/en/news/Bootloader-U-Boot-Vulnerabilities-allow-bypassing-the-chain-of-trust-10287520.html
I have no distrust in Microsoft. I work in a field where security and trust is key.
But for sure there are shady folk out there, Oracle stating they where not hacked for instance. Microsoft has a bit of a shady past as well.