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The Primary Bootloader (PBL), which is stored in the Boot ROM [3] is the first stage of the boot process. This code is written by the chipset manufacturer. [4] The PBL verifies the authenticity of the next stage. On Samsung smartphones, the Samsung Secure Boot Key (SSBK) is used by the boot ROM to verify the next stages. [5]
(Zygote is an Android system service that is the parent of all Android application processes. [8]) The libm source is largely FreeBSD's, but with optimized assembler contributed by the various SoC vendors. The dynamic linker (and libdl) were written from scratch. Bionic doesn't include libthread_db (used by gdbserver), but the NDK did.
Android phones, like this Nexus S running Replicant, allow installation of apps from the Play Store, F-Droid store or directly via APK files. This is a list of notable applications ( apps ) that run on the Android platform which meet guidelines for free software and open-source software .
Fastboot is a communication protocol used primarily with Android devices. [1] It is implemented in a command-line interface tool of the same name and as a mode of the bootloader of Android devices. The tool is included with the Android SDK package and used primarily to modify the flash filesystem via a USB connection from a host
Richard Stallman and the Free Software Foundation have been critical of Android and have recommended the usage of alternatives such as Replicant, because drivers and firmware vital for the proper functioning of Android devices are usually proprietary, and because the Google Play Store application can forcibly install or uninstall applications ...
Developed between 2009 and 2016, it was free and open-source software based on the official releases of Android by Google, with added original and third-party code, and based on a rolling release development model.
System Profiles – Enable or disable common settings based on the selected profile (For example, a "Home" profile and a "Work" profile). The profile can be selected either manually or through the use of a "trigger", such as upon connecting to a specific WiFi access point, connecting to a Bluetooth device, or tapping an NFC tag.
Android Runtime (ART) is an application runtime environment used by the Android operating system. Replacing Dalvik , the process virtual machine originally used by Android, ART performs the translation of the application's bytecode into native instructions that are later executed by the device's runtime environment.