{"product_id":"exceptional-kernel-engineering-bootstrapping-the-machine-from-uefi-bios-to-ring-0-9798269483184","title":"Exceptional Kernel Engineering - Bootstrapping the Machine: From UEFI\/BIOS to Ring 0","description":"\u003cp\u003e • Author(s): M. Shor\u003cbr\u003e • Publisher: Independently Published\u003cbr\u003e • Publisher Imprint: Independently Published\u003cbr\u003e • BISAC: Operating Systems - Linux\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e\u003cp\u003eI wrote this book to explain, with engineering precision, what actually happens between reset and your first line of C in ring 0. Most operating systems texts start after the hard part. I start at power-on and make early boot a tractable, testable sequence. I show how firmware prepares the stage, what guarantees the CPU makes, and what invariants you must establish before higher level subsystems can exist.\u003c\/p\u003e\u003cp\u003eYou will see how to choose and configure a cross toolchain, how linker scripts shape memory layout, and how a small assembly shim hands control to a freestanding C runtime. I walk through CPU modes, segmentation artifacts that still matter, and the clean path into 64-bit long mode. I build a practical model for interrupts and exceptions, set up the IDT, map timers and time sources, and explain when to retire legacy mechanisms. I approach paging as a data structure problem, clarifying identity maps, higher-half layouts, and flags like NX, global, and PCID. I include a careful treatment of memory discovery via E820 and UEFI maps, early allocation strategies for stacks and page tables, and defensively designed boot protocols that keep handoff data precise and versionable.\u003c\/p\u003e\u003cp\u003eI keep the tone pragmatic. Each step is tied to a reason you can verify with QEMU, GDB, CPUID, and MSRs. I prefer small, composable building blocks over monoliths, so you always know what is initialized, what is safe to call, and what could fault. I maintain a strict freestanding C mindset, explain the safe subset to use, and avoid surprises hidden in compiler defaults.\u003c\/p\u003e\u003cp\u003eThis book is for systems programmers, embedded engineers, and curious developers who want to design kernels from first principles. If you are comfortable with C and willing to read a little assembly, you will leave with a reliable bootstrapping playbook and the confidence to expand it.\u003c\/p\u003e","brand":"Atlantic Books","offers":[{"title":"Paperback","offer_id":46332070690967,"sku":"9798269483184","price":3391.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/3471\/1191\/files\/9798269483184.webp?v=1768725112","url":"https:\/\/atlanticbooks.com\/products\/exceptional-kernel-engineering-bootstrapping-the-machine-from-uefi-bios-to-ring-0-9798269483184","provider":"Atlantic Books","version":"1.0","type":"link"}