Re: Debian on my tablet?

[Rodolfo Medina <rodolfo.medina@gmail.com>]

Paul Wise <pabs@debian.org> writes:

> On Fri, Jan 20, 2017 at 5:05 PM, Rodolfo Medina wrote:
>
>> Yes, there is one.
>
> Could you paste /proc/mtd into an email?

It's an empty file.

>> I did as you suggested.  I downloaded the firmware, unpacked it with `unar' and
>> then ran rkunpack over the file update.img.  Some other files were created.
>> What now?
>
> What files do you see?
> Is there a zImage or vmlinuz?

The following two files were created: BOOT and embedded-update.img, and the
following output was produced:

rkunpack: info: RKFW signature detected
rkunpack: info: version: 1.1.0
rkunpack: info: date: 2013-04-17 15:57:08
rkunpack: info: family: rk30xx
rkunpack: info: 00000066-0002ee73 BOOT                       (size: 192014)
rkunpack: info: 0002ee74-1a137e77 embedded-update.img        (size: 437293060)
unpacked

.  Is embedded-update.img our kernel image?  And should we conclude that maybe
0x00000066 is the system RAM base address we are looking for?


>> Thanks indeed for your help...  What comes now?
>
> Continue to go through the article, getting the needed info.

Now I'm at:

# mkdir my-initramfs
# cd my-initramfs
# mkdir -p proc sys dev mnt/root sbin
# cp /my/arm/busybox sbin/busybox
# cp /above/init init
# chmod a+x init sbin/busybox
# find . | cpio --quiet -H newc -o | gzip > ../initramfs.cpio.gz
# cd ..
# mkbootimg --base 0x00200000 --kernel zImage --ramdisk initramfs.cpio.gz -o my-boot.img

.  So I need the two parameters: --base and --kernel.  Should I maybe put, in
place of 0x00200000, the above 0x00000066 that came out from the output of
rkunpack?  And what should I put in place of zImage?

Besides, the binary busybox was already in my computer and the command
`mkbooting' seems to be part of the package android-tools-mkbootimg.  Is that
right?

Thanks,

Rodolfo