Running only the Linux kernel of an Android device


 
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Operating Systems Linux Android Running only the Linux kernel of an Android device
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Old 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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LINUX(4)						   BSD Kernel Interfaces Manual 						  LINUX(4)

NAME
linux -- Linux ABI support SYNOPSIS
To compile support for this ABI into an i386 kernel place the following line in your kernel configuration file: options COMPAT_LINUX for an amd64 kernel use: options COMPAT_LINUX32 Alternatively, to load the ABI as a module at boot time, place the following line in loader.conf(5): linux_load="YES" DESCRIPTION
The linux module provides limited Linux ABI (application binary interface) compatibility for userland applications. The module provides the following significant facilities: o An image activator for correctly branded elf(5) executable images o Special signal handling for activated images o Linux to native system call translation It is important to note that the Linux ABI support it not provided through an emulator. Rather, a true (albeit limited) ABI implementation is provided. The following sysctl(8) tunable variables are available: compat.linux.osname Linux kernel operating system name. compat.linux.osrelease Linux kernel operating system release. Changing this to something else is discouraged on non-development systems, because it may change the way Linux programs work. Recent versions of GNU libc are known to use different syscalls depending on the value of this sysctl. compat.linux.oss_version Linux Open Sound System version. The linux module can be linked into the kernel statically with the COMPAT_LINUX kernel configuration option or loaded as required. The fol- lowing command will load the module if it is neither linked into the kernel nor already loaded as a module: if ! kldstat -v | grep -E 'linux(aout|elf)' > /dev/null; then kldload linux > /dev/null 2>&1 fi Note that dynamically linked Linux executables will require a suitable environment in /compat/linux. Specifically, the Linux run-time linker's hints files should be correctly initialized. For this reason, it is common to execute the following commands to prepare the system to correctly run Linux executables: if [ -x /compat/linux/sbin/ldconfig ]; then /compat/linux/sbin/ldconfig -r /compat/linux fi For information on loading the linux kernel loadable module automatically on system startup, see rc.conf(5). This information applies regardless of whether the linux module is statically linked into the kernel or loaded as a module. FILES
/compat/linux minimal Linux run-time environment /compat/linux/proc limited Linux process file system /compat/linux/sys limited Linux system file system SEE ALSO
brandelf(1), elf(5), linprocfs(5), linsysfs(5) HISTORY
Linux ABI support first appeared in FreeBSD 2.1. BSD
February 8, 2010 BSD