Kernel Unpacking

[Guest utternoob]

OK give me a few minutes

It says skate device when debugging is enabled

Edited July 23, 2012 by utternoob

[Guest utternoob]

Good news, can logcat now, adb drivers are installed. will try again and post it

so far, only logcat while on, not when booting :(

When booting up, I get an unknown device error and win xp says it's malfunctioned and cannot be recognised, stopping logcat from being read. Is it drivers again?

Edited July 23, 2012 by utternoob

[Guest razzmataz1478]

Sounds like a windows issue. You have Debian, yeah? I'll get back to you tomorrow.

[Guest utternoob]

Yeah. Will download sdk for Linux tomorrow. Does it work same as windows?

[Guest razzmataz1478]

Yeah. Will download sdk for Linux tomorrow. Does it work same as windows?

Slightly different.

[Guest utternoob]

Ah ok. Will resize my sd card first and then go onwards. Should be fun :) is the linux sdk zip 73mb per chance

[Guest C3C0]

I think your boot.img is not created as it supposes to be. Will post a short guide soon.

[Guest C3C0]

DP

Edited July 24, 2012 by C3C0

[Guest utternoob]

Thanks :)

[Guest C3C0]

boot.img unpacking/packing guide

1) Create working dir, extract my set of tools inside. You will end up with "bin" subdir

2) Put original boot.img inside working dir

3) To split boot.img into boot.img-kernel (kernel image) and boot.img-ramdisk.gz

$ bin/split_bootimg.pl boot.img

4) To unpack ramdisk

$ mkdir ramdisk // create working dir for ramdisk

$ cp boot.img-ramdisk.gz ramdisk // copy ramdisk gz into ramdisk working dir

$ cd ramdisk

$ gunzip boot.img-ramdisk.gz

$ ../bin/ramfs_unpack boot.img-ramdisk

$ rm boot.img-ramdisk // delete so we don't accidentaly include it when packing

now make desired changes to files 5) To pack ramdisk

$ ../bin/ramfs_pack ../boot.img-ramdisk.new

$ cd ..

$ gzip boot.img-ramdisk.new

6) To make new final boot.img

$ bin/mkbootimg --kernel boot.img-kernel --ramdisk boot.img-ramdisk.new.gz --base 0x02600000 --pagesize 2048 -o new.boot.img

Note: ramfs_pack and unpack are my wrapper scripts and they call "cpio" command with the correct parameters.

[Guest utternoob]

Thanks a lot. When I get some time, will try this. Download tools from previous page?

[Guest C3C0]

Yes

[Guest utternoob]

This is probably the worst question ever, but could it be done on terminal emulator?

[Guest utternoob]

Tried it and got to last step but bash: bin/mkbootimg: cannot execute binary file

[Guest C3C0]

Probably because it is not compatible with your OS version.

I use it on Linux boxes with 2.6.32 and 3.0 kernels and libc6

It also depends on GCC. Try installing gcc.

Edited July 24, 2012 by C3C0

[Guest utternoob]

What is gcc and does it work with debian 6.0?

[Guest C3C0]

Running "file"command on mkbootimg tells you info on what kind of binary it is.

[email="gregus@hermes:~/android/bin$"]gregus@hermes:~/android/bin$[/email] file mkbootimg

mkbootimg: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, not stripped

GCC is a gnu C compiler and it looks like mkbootimg is using some of its shared libs.

BTW, your debian should have something like "abootimg" package containing android bin tools.

Have you tried it? (aptitude install abootimg)

http://packages.debian.org/en/sid/abootimg

Edited July 24, 2012 by C3C0

[Guest utternoob]

I will do that first

[Guest utternoob]

I get dpkg error, and don't know how to fix it. Says it stopped and needs configuring

Edit, fixing now

Edited July 24, 2012 by utternoob

[Guest razzmataz1478]

I get dpkg error, and don't know how to fix it. Says it stopped and needs configuring

Ubuntu all the way.

[Guest utternoob]

On a Raspberry Pi? Like running it on a Skate with half the ram, almost impossible

[Guest razzmataz1478]

On a Raspberry Pi? Like running it on a Skate with half the ram, almost impossible

Sorry, didn't see you had it running on a raspberry pi :o

[Guest utternoob]

Yeah. Can't install abootimg from online repository despite having set the correct server in sources.list and it won't install offline either :(

[Guest razzmataz1478]

You could always compile it from source ;)

https://gitorious.org/ac100/abootimg

[Guest utternoob]

Could do. Use make command?