What is the linux kernel driver written in?

The Linux kernel driver is written in C language. The reasons are: 1. C language provides direct access and control functions to the underlying hardware, making it very suitable for developing driver programs; 2. C language is a A high-performance and efficient programming language, compared with other high-level languages, it executes faster and takes up less memory; 3. C language is a widely supported programming language that can run on almost any operating system and Platform; 4. The static type checking and strict compilation process of C language help reduce the occurrence of errors and vulnerabilities.

The operating system of this tutorial: Linux5.18.14 system, Dell G3 computer.

Linux kernel drivers can be written in a variety of programming languages, but the most commonly used is C language. The reasons why C language is widely used when writing kernel drivers are as follows:

• Close to hardware: C language provides direct access and control functions to the underlying hardware, making it very suitable for driver development program. Through C language, developers can interact with hardware by reading and writing registers, accessing device memory, etc.

• Performance and efficiency: C language is a high-performance and efficient programming language. Compared with other high-level languages, it executes faster and takes up less memory. This is very important for drivers, which need to respond to the hardware in real time and keep system overhead as low as possible.

• Cross-platform support: C language is a widely supported programming language that can run on almost any operating system and platform. The Linux kernel is written in C language. Using C language to write drivers can achieve tight integration with the Linux kernel and good cross-platform compatibility.

• Reliability and stability: C language’s static type checking and strict compilation process help reduce the occurrence of errors and vulnerabilities. For drivers, this is crucial because the stability of the driver is directly related to the stability and reliability of the system.

In the Linux kernel, the driver is responsible for communicating with hardware devices and providing a unified interface to the upper layer. By writing C language drivers, developers can make full use of the underlying functions and features of the Linux kernel, such as interrupt handling, memory management, process scheduling, etc., making it easier to control and manage the hardware.

In short, using C language to write Linux kernel drivers has the advantages of high performance, reliability, cross-platform compatibility, etc., making it one of the preferred programming languages ​​​​for Linux kernel drivers.

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