Hello everyone, I am a programmer. This article is about 2700 words long. Interrupt handling is one of the most core and complex parts of driver development, directly affecting the responsiveness of the driver and the stability of the system. I haven’t delved deeply into interrupt handling; I only check the interrupt data under /proc/interrupts … Read more
Hello, everyone, I am Programmer MM. This article is about 2700 words long. Today, I took a day off and finished reading Chapter 8 of ‘Linux Device Drivers (3rd Edition)’ – Memory Allocation. This chapter systematically explains various mechanisms of kernel space memory management, which is core knowledge that driver developers must master, directly affecting … Read more
Hello, everyone, I am Programmer MM. This article is approximately 2400 words. Recently, I finished reading Chapter 6 of ‘Linux Device Drivers’, and I have organized my notes from this chapter. In this chapter, the development of device drivers has progressed from simple data transfer to an advanced stage with complete synchronization and control capabilities. … Read more
This article will provide a complete analysis of the dynamic loading process of kernel modules. To emphasize, we are organizing the dynamic loading process in this section, which involves compiling into a <span>ko</span> file and using the <span>insmod</span> method to load it, which differs from the <span>built-in</span> process where the kernel automatically loads modules. First, … Read more
In-Depth Analysis of Memory Mapping in Linux Device Drivers 1. In-Depth Analysis of Working Principles Memory mapping (Memory Mapping, <span>mmap</span>) is a method that directly maps device memory or driver kernel buffers into the user process address space. The core idea is: to establish a direct mapping from a virtual memory area (VMA) to physical … Read more
