12-07-2013
Running only the Linux kernel of an Android device
I am looking for a way to run on top of the Linux kernel of an Android device. I want to use the existing configured Linux beneath Android rather than put a new Linux distribution onto a device.
The article "The Android boot process from power on" (sorry, forum won't let me paste the link) describes the boot process as:
1) execute Boot ROM code
2) execute first stage of the boot loader
3) load the Linux kernel and execute the init process
4) load Zygote, Dalvik etc.
5) loads the System server
6) Boot completed
I would like to find a way to interrupt it at the end of step 3, leaving a linux system without extra layers on top.
Has anyone tried this?
What needs to be done to deactivate the android layers and produce a linux device that I can put linux applications onto?
thanks in advance
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LEARN ABOUT XFREE86
kernel-install
KERNEL-INSTALL(8) kernel-install KERNEL-INSTALL(8)
NAME
kernel-install - Add and remove kernel and initramfs images to and from /boot
SYNOPSIS
kernel-install COMMAND KERNEL-VERSION [KERNEL-IMAGE]
DESCRIPTION
kernel-install is used to install and remove kernel and initramfs images to and from /boot.
kernel-install will execute the files located in the directory /usr/lib/kernel/install.d/ and the local administration directory
/etc/kernel/install.d/. All files are collectively sorted and executed in lexical order, regardless of the directory in which they live.
However, files with identical filenames replace each other. Files in /etc/kernel/install.d/ take precedence over files with the same name
in /usr/lib/kernel/install.d/. This can be used to override a system-supplied executables with a local file if needed; a symbolic link in
/etc/kernel/install.d/ with the same name as an executable in /usr/lib/kernel/install.d/, pointing to /dev/null, disables the executable
entirely. Executables must have the extension ".install"; other extensions are ignored.
An executable should return 0 on success. It may also return 77 to cause the whole operation to terminate (executables later in lexical
order will be skipped).
COMMANDS
The following commands are understood:
add KERNEL-VERSION KERNEL-IMAGE
kernel-install creates the directory /boot/MACHINE-ID/KERNEL-VERSION/ and calls executables from /usr/lib/kernel/install.d/*.install
and /etc/kernel/install.d/*.install with the arguments
add KERNEL-VERSION
/boot/MACHINE-ID/KERNEL-VERSION/ KERNEL-IMAGE
The kernel-install plugin 50-depmod.install runs depmod for the KERNEL-VERSION.
The kernel-install plugin 90-loaderentry.install copies KERNEL-IMAGE to /boot/MACHINE-ID/KERNEL-VERSION/linux. It also creates a boot
loader entry according to the boot loader specification in /boot/loader/entries/MACHINE-ID-KERNEL-VERSION.conf. The title of the entry
is the PRETTY_NAME parameter specified in /etc/os-release or /usr/lib/os-release (if the former is missing), or "Linux KERNEL-VERSION",
if unset. If the file initrd is found next to the linux file, the initrd will be added to the configuration.
remove KERNEL-VERSION
Calls executables from /usr/lib/kernel/install.d/*.install and /etc/kernel/install.d/*.install with the arguments
remove KERNEL-VERSION /boot/MACHINE-ID/KERNEL-VERSION/
kernel-install removes the entire directory /boot/MACHINE-ID/KERNEL-VERSION/ afterwards.
The kernel-install plugin 90-loaderentry.install removes the file /boot/loader/entries/MACHINE-ID-KERNEL-VERSION.conf.
EXIT STATUS
If every executable returns 0 or 77, 0 is returned, and a non-zero failure code otherwise.
FILES
/usr/lib/kernel/install.d/*.install /etc/kernel/install.d/*.install
Drop-in files which are executed by kernel-install.
/etc/kernel/cmdline /proc/cmdline
The content of the file /etc/kernel/cmdline specifies the kernel command line to use. If that file does not exist, /proc/cmdline is
used.
/etc/machine-id
The content of the file specifies the machine identification MACHINE-ID.
/etc/os-release /usr/lib/os-release
The content of the file specifies the operating system title PRETTY_NAME.
SEE ALSO
machine-id(5), os-release(5), Boot loader specification[1]
NOTES
1. Boot loader specification
https://www.freedesktop.org/wiki/Specifications/BootLoaderSpec
systemd 237 KERNEL-INSTALL(8)