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This book helps you gaining the foundation knowledge to write an operating system from scratch. Hence the title, 0 to 1.
After completing this book, at the very least:
How to write an operating system from scratch by reading hardware datasheets. In the real world, it works like that. You won’t be able to consult Google for a quick answer.
Write code independently. It’s pointless to copy and paste code. Real learning happens when you solve problems on your own. Some examples are given to kick start, but most problems are yours to conquer. However, the solutions are available online for you to examine after giving a good try.
A big picture of how each layer of a computer related to each other, from hardware to software.
Linux as a development environment and how to use common tools for low-level programming.
Understand x86 assembly in-depth.
How a program is structured so that an operating system can run.
How to debug a program running directly on hardware with gdb and QEMU.
Linking and loading on bare metal x86_64, with pure C. No standard library. No runtime overhead.