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Booting/README.md
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# Kernel Boot Process # Kernel Boot Process
This chapter describes the linux kernel boot process. Here you will see a This chapter describes the linux kernel boot process. Here you will see a
couple of posts which describes the full cycle of the kernel loading process: series of posts which describes the full cycle of the kernel loading process:
* [From the bootloader to kernel](linux-bootstrap-1.md) - describes all stages from turning on the computer to running the first instruction of the kernel. * [From the bootloader to kernel](linux-bootstrap-1.md) - describes all stages from turning on the computer to running the first instruction of the kernel.
* [First steps in the kernel setup code](linux-bootstrap-2.md) - describes first steps in the kernel setup code. You will see heap initialization, query of different parameters like EDD, IST and etc... * [First steps in the kernel setup code](linux-bootstrap-2.md) - describes first steps in the kernel setup code. You will see heap initialization, query of different parameters like EDD, IST and etc...
* [Video mode initialization and transition to protected mode](linux-bootstrap-3.md) - describes video mode initialization in the kernel setup code and transition to protected mode. * [Video mode initialization and transition to protected mode](linux-bootstrap-3.md) - describes video mode initialization in the kernel setup code and transition to protected mode.
* [Transition to 64-bit mode](linux-bootstrap-4.md) - describes preparation for transition into 64-bit mode and details of transition. * [Transition to 64-bit mode](linux-bootstrap-4.md) - describes preparation for transition into 64-bit mode and details of transition.
* [Kernel Decompression](linux-bootstrap-5.md) - describes preparation before kernel decompression and details of direct decompression. * [Kernel Decompression](linux-bootstrap-5.md) - describes preparation before kernel decompression and details of direct decompression.
* [Kernel random address randomization](linux-bootstrap-6.md) - describes randomization of the Linux kernel load address.

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Booting/linux-bootstrap-6.md
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``` ```
This value may be changed during kernel configuration, but also load address can be selected as random value. For this purpose the `CONFIG_RANDOMIZE_BASE` kernel configuration option should be enabled during kernel configuration. This value may be changed during kernel configuration, but also load address can be selected as a random value. For this purpose the `CONFIG_RANDOMIZE_BASE` kernel configuration option should be enabled during kernel configuration.
In this case a physical address at which Linux kernel image will be decompressed and loaded will be randomized. This part considers the case when this option is enabled and load address of the kernel image will be randomized for [security reasons](https://en.wikipedia.org/wiki/Address_space_layout_randomization). In this case a physical address at which Linux kernel image will be decompressed and loaded will be randomized. This part considers the case when this option is enabled and load address of the kernel image will be randomized for [security reasons](https://en.wikipedia.org/wiki/Address_space_layout_randomization).

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SUMMARY.md
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* [Video mode initialization and transition to protected mode](Booting/linux-bootstrap-3.md) * [Video mode initialization and transition to protected mode](Booting/linux-bootstrap-3.md)
* [Transition to 64-bit mode](Booting/linux-bootstrap-4.md) * [Transition to 64-bit mode](Booting/linux-bootstrap-4.md)
* [Kernel decompression](Booting/linux-bootstrap-5.md) * [Kernel decompression](Booting/linux-bootstrap-5.md)
* [Kernel load address randomization](Booting/linux-bootstrap-6.md)
* [Initialization](Initialization/README.md) * [Initialization](Initialization/README.md)
* [First steps in the kernel](Initialization/linux-initialization-1.md) * [First steps in the kernel](Initialization/linux-initialization-1.md)
* [Early interrupts handler](Initialization/linux-initialization-2.md) * [Early interrupts handler](Initialization/linux-initialization-2.md)