Why Interrupts Matter: Unraveling CPU Interrupt Mechanisms and the IDT

This article explains how CPUs receive interrupt numbers through hardware, exceptions, or the INT instruction, describes the structure and purpose of the Interrupt Descriptor Table, and details the stack operations and control‑flow steps the processor performs to handle and return from an interrupt.

CPUException HandlingIDT

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Why Interrupts Matter: Unraveling CPU Interrupt Mechanisms and the IDT

360 Tech Engineering

Mar 13, 2020 · Fundamentals

Understanding IDT Initialization, Interrupt Gates, and System Call Implementation in the Linux Kernel

This article explains what an IDT is, how it is initialized, the structure of interrupt descriptor entries and gates, the implementation of traditional system calls via int 0x80, and the setup and handling of hardware interrupts in the Linux kernel.

AssemblyIDTInterrupts

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Understanding IDT Initialization, Interrupt Gates, and System Call Implementation in the Linux Kernel

360 Tech Engineering

Mar 5, 2020 · Fundamentals

Understanding CPU Interrupts and Their Initialization in the Linux Kernel

This article explains what CPU interrupts are, distinguishes synchronous and asynchronous types, describes the role of APIC controllers, and details the step‑by‑step initialization of the Interrupt Descriptor Table and related interrupt handling mechanisms in the Linux kernel.

APICCPU architectureException Handling

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Understanding CPU Interrupts and Their Initialization in the Linux Kernel