Re: [gentoo-soc] Application for Google Summer of Code 2018-Mishal Roy

[Mishal Roy]

Hi,

Yes I will download the Xiaomi boot image by ebuild.

I had proposed this small project so that it can be successfully completed
within the time frame of three months.
Eliminating the concept of boot image is feasible.
If you recommend, I would like to extend my proposal by adding it.
Aboot the application bootloader of Redmi Note 4 reads boot image and loads
kernel+ramdisk into RAM.
On the other hand, bootloader on computer reads kernel and ramdisk ,and
loads those into RAM.
We can make Aboot function like a computer bootloader by editing its source
code [1].
However we will require Xiaomi's permission  to allow us install the newly
built Aboot because Aboot gets checked by SBL(Secondary boot loader) [2].

I recently got familiar with basics of Gentoo.
I have been using Ubuntu since 2 years.
I have Ubuntu on my desktop computer and laptop.
I use Ubuntu for compiling ASM, C and MATLAB codes.
I also use it for running Guitarix,Rakarrack ( virtual guitar amplifiers)
and Audacity sound recorder.
Through Ubuntu I got to know about initramfs as well as list of services
that are started by sysvinit and upstart.
i.e. udev, pulseaudio , x-sever, lightdm, dbus, cron etc.
I have experimented with these sevices by starting and stopping.
I have not contributed to any community or solved bugs so far.
I have Dell Venue 7 3740 which is an Intel powered Android device.This
device is my main device for Android development.
https://opensource.dell.com/releases/Venue_7_3740_Merrifield/developer-edition/A195/

1. https://www.tldp.org/HOWTO/SRM-HOWTO/aboot.html
2.
https://forum.xda-developers.com/android/general/info-android-device-partitions-basic-t3586565/amp/

Thanks and Regards,
Mishal Roy.

On Thu, Mar 22, 2018 at 9:37 AM, Benda Xu <heroxbd@g.o> wrote:

> Hi Mishal,
>
> Mishal Roy <roymishal210@×××××.com> writes:
>
> > As a proof of my proposed concept I have written a kernel ebuild which
> > successfully builds x86 linux kernel from source code present in
> > /usr/src/linux directory of Gentoo liveDVD. I have attached the ebuild
> > and images related to it.
>
> Thank you for trying this out.
>
> You still have a lot to learn about the basics of ebuild.  Alice is on
> the Kernel Team.  She might have more to comment.
>
> > x86kernelbuild-1.0.ebuild
>
> The version number should be the same as upstream.  No
> architecture-specific name, like 'x86, should be used in the name.
>
> > EAPI=0
>
> EAPI=0 is no longer encourage in Gentoo.  Check out EAPI-6
>
> > DESCRIPTION="This is an ebuild that compiles x86 linux kernel"
>
> > SLOT="0"
>
> > KEYWORDS="~x86"
>
> > pkg_preinst()
>
> pkg_preinst is not used like this.  Check out src_compile.
>
> >
> > {
> > cd /usr/src/linux
> > make ARCH=x86 i386_defconfig
> > make && make modules_install
> > }
>
> > builds x86 linux kernel from source code present in /usr/src/linux
> > directory of Gentoo liveDVD
>
> This is not how Gentoo ebuild works, the build should prepare the source
> code.
>
>
> Kernel is a specific piece of software.  Traditionally users take care
> of the final installation.  But there is a genkernel helper to automate
> the process.  Please check out
>
>   https://wiki.gentoo.org/wiki/Genkernel
>
> for inspirations.
>
>
> Cheers,
> Benda
>