Android linux kernel11/12/2023 ![]() ![]() For example, the Exynos kernel will have drivers for Exynos Samsung devices while the OMAP kernel does not. These various kernels mainly variety in their driver availability. The Exynos kernel is used by Samsung Exynos chipsets. The NVIDIA Tegra chipsets run on the Tegra chipset kernel ( ). Samsung hummingbird chipsets use the Samsung kernel ( ). The OMAP kernel is for the TI OMAP chipsets ( ). The MSM kernel ( ) is for Qualcomm MSM chipsets. The Goldfish kernel ( ) is for emulated platforms like running a virtual Android system within a host system on a desktop computer. There are a few different kinds of Android kernels as seen on the Android kernel's Git page ( ). They may work in some instances, but you must know what you are doing and only apply them to drivers/modules that are still Vanilla (unaltered from the original). Patches can be applied to the Android kernel's source code the same way as the Vanilla kernel, except the patches must be Android patches. So, I will not discuss the Android kernel that far. The process of installing an Android kernel is a process that requires more knowledge in Android development and many more steps. If the configuration and compiling process went well, the Android kernel is ready for a device. When configuring the Android kernel, it is very important to note that it must be cross-compiled. Keep this in mind when configuring the kernel. Also, you may see in the configuration tool (after loading the proper config file) that Android is an embedded Linux system. However, be careful not to undo a feature/option that is important to Android (like ashmem). Here is the most important step, load an alternate configuration file such as "./android/configs/android-base.cfg". I will use "make menuconfig" for my screenshots. To configure the kernel, do as you would for a Vanilla kernel - open a terminal in the source code directory and type "make ". For illustration, the same filesystems are seen in Android's filesystem driver directory (./fs/) as in the Vanilla kernel. By looking at any part of the Android kernel, the Android and Vanilla kernel are nearly the same. security/ folder of the kernel's source code, Android supports the same Linux Security Modules (LSMs) that a desktop/server kernel would. Here is a download link - archive/android-3.10.tar.gzĪs seen in the. For instance, kernels for Samsung phones can be downloaded here ( ).ĭOWNLOAD: To download an Android kernel, look to the "tgz" hyperlink near "Commit" around the top of the screen. Some proprietary or special hardware may have a kernel designed specifically for them. The generic Android kernel can be seen here - ( /android-3.10) which looks very similar to the Vanilla kernel. Just like the Vanilla kernel, the Android kernel is open-source software (due to the GPL license on the Vanilla kernel). Linux kernels for Android can be downloaded or viewed here - ( ). NOTE: Some people say "Android/Linux" instead of "Dalvik/Linux". In other words, no Android system uses a Vanilla Kernel. The Linux kernel used in Android lacks drivers that would not be in phones and instead has drivers for phone devices. As you may remember from configuring the kernel, there were no drivers for phone devices (like small keypads, 3G/4G cards, SIM cards, etc.). The userland (GNU and Dalvik) does not determine whether an OS is Linux or not. If an operating system uses the Linux kernel, then it is a Linux system. For example, Ubuntu is " GNU/Linux" while Android is " Dalvik/Linux". True, they are not quite the same, but Android is Linux. Many of you may be unaware of this, but Android is Linux. Aloha! Now that we have studied the Linux kernel very well and learned how to make our own, we will move on to a slightly different direction in this series. ![]()
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