Android Genesis Android Genesis Android Genesis Day 1 On the first day, Google said, \"There must be electricity.\" So the current rushed to the circuit board and into the ARM processor, and ARM started to work. --xxx When the embedded world was born, the world was wild. Current rushed to various chips, and various processors were waiting to be awakened. ARM woke up and began to examine itself. . . . ---------------The following content may be wrong, please correct me------------------People call it Bootloader, which is a buddy of BIOS in PC. It is responsible for the initialization of various ports of the chip and the settings of CPU clock and so on. In mobile phones, bootloader is generally the base package mentioned by people who flash the machine (not all of them, I will talk about it the next day). Take Motorola as an example. After buying a mobile phone, enthusiasts will always flash the base package first, such as the base package of Nordic, Hong Kong, Brazil, etc. First download the 100~300m sbf file. The base package is so big, what does it contain? Bootloader must be in it, but the embedded world was wild at the beginning. Can it be so big? ---------------The above content may be wrong, please correct me------------------ Let\'s open it and find out: Here I will talk about how to unzip the sbf package, so that geeks who want to flash the machine can find out. Download SBF-Recalc, use this software to unzip the sbf package, here take 3.4.3_11-Stock.UKTmobile_BLUR.sbf Xinxinying package as an example, the unzipped files are as follows: [pic] So many things came out, did you see two files of more than 8MB? They are the basic kernel of Linux. If you unzip a third-party rom flashing package at random, there will be boot.img in it, which is similar to these two files. I don\'t know which one is the bootloader accurately, but I am not good enough. . . . . . 1. What does the bootloader do? Generally, there are many file systems in mobile phones, from N...
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