MobileRead Forums - View Single Post - Backporting firmware 4.0.1 on Kindle 3

yifanlu · 11-24-2011, 01:17 AM

I take back what I said about the kernel not mattering. You may be right, some of the compiled tools do not support an older kernel version. However, I don't think we need to recompile the kernel, just the non-working tools. It's most likely a low-level lib. I'm guessing glibc & friends because it went from 2.5 -> 2.12 on the Kindle 4.

EDIT: I'm curious why Amazon included glibc in their sources for all versions up until 4.0 Did they forget? Anyways, it seems like Amazon never edits glibc, so we can compile the vanilla sources: http://ftp.gnu.org/gnu/glibc/glibc-2.12.1.tar.bz2

Cross compile that for arm targeted at a lower kernel version, and we might get a working bootup.

11-24-2011, 01:17 AM	#23
yifanlu Kindle Dissector Posts: 662 Karma: 475607 Join Date: Jul 2010 Device: Amazon Kindle 3	I take back what I said about the kernel not mattering. You may be right, some of the compiled tools do not support an older kernel version. However, I don't think we need to recompile the kernel, just the non-working tools. It's most likely a low-level lib. I'm guessing glibc & friends because it went from 2.5 -> 2.12 on the Kindle 4. EDIT: I'm curious why Amazon included glibc in their sources for all versions up until 4.0 Did they forget? Anyways, it seems like Amazon never edits glibc, so we can compile the vanilla sources: http://ftp.gnu.org/gnu/glibc/glibc-2.12.1.tar.bz2 Cross compile that for arm targeted at a lower kernel version, and we might get a working bootup. Last edited by yifanlu; 11-24-2011 at 01:24 AM.