June 2017
Intermediate to advanced
478 pages
13h 14m
English
Content preview from Mastering Embedded Linux Programming - Second Edition
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Kernel
The Linux kernel is a critical component that will certainly need updating from time to time. There are several parts to the kernel:
- A binary image loaded by the bootloader, often stored in the root filesystem.
- Many devices also have a Device Tree Binary (DTB) that describes hardware to the kernel, and so has to be updated in tandem. The DTB is usually stored alongside the kernel binary.
- There may be kernel modules in the root filesystem.
The kernel and DTB may be stored in the root filesystem, so long as the bootloader has the ability to read that filesystem format, or it may be in a dedicated partition. In either case, it is possible to have redundant copies.
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