Updates to the Printed Edition

Here you can find all changes across book editions/revisions.

First edition

Revision 0

Release date: Jun, 2023. First book release.

Revision 1

Release date: August, 2023. Second book release.

• Add Cross Compiling appendix chapter
• Linker chapter improvements
• Various typos fix
• Add more details on the Thread Sleep section
• Improve readability of Virtual Memory Management illustration.
• Fix broken links
• Fix Cover Alignment
• Add paragraph about lockfree queues in IPC chapter
• Add more details in the VMM Section of Process and Threads chapter
• Explain content of Segment Selectors in GDT chapter
• Improve readability of some parts inside Userspace chapters

Revision 2

Release date: December 2023. Third Book release

• Add more information on the Memory protection chapter, abouit its future implications
• Emergency grammar fix!
• Fix tss structure in Userspace/Handling_Interrupt chapter
• Add watchpoint information on gdb chapter
• Add explanation on how to test when entering userspace
• Fix some examples in the Nasm appendix, and add new section with loop cycle example.

Revision 3

Release date: April 2024. Fourth book release

• Typo fixes
• Expand Syscall example chapter
• Expand ELF chapter, and fixing code in one of examples

Revision 4

Release date: Sept 2024 Fifth book release

• Typo fixes
• Code (and typo) fixes on the framebuffer chapter.
• Add explanation of potential bug on converting GIMP Header file to RGB.
• Added missing flags on page table/dirs entries
• Rewrite and rearrangement of syscall/sysret section

Revision 5

Relase date: Jan 2025 Sixth Book Release

• Stivale 2 protocol sections have been replaced with Limine protocol, since stivale2 has been deprecated.
• Add a complete exammple of how to create an ELF executable for our kernel
• Typo and error fixes
• New short paragraph to explain the behaviour of literals with bitwise operators.

Revision 6

Release date: Feb 2026 Seventh Book Release

• Typo Fixes
• Fix errors in C code examples
• New paragraph in Appendix F about literals and shitfting in C
• Update the kheap chapter, to use the term “coalescing” instead of merging
• New section: Resource Management (thanks to @Maxtyson123)