Under Linux,Ī module is nothing more than a C program with a Module resides in the same privilege level of the OS (the highest)Īnd therefore can access every resource of the system. Is a piece of code written explicitly to work with the existing kernel,īut designed to be inserted or removed as necessary while the OS is running. ContentsĪ kernel module is an extension to the operating system. The many possible configurations for kernel modules. Therefore, keep in mind that what you see here is just one flavor of ![]() ![]() The way kernel modules worked in version 2.4 of the kernel hasĬhanged in version 2.6, and may change again with future versions. Kernel modules and device drivers continue to evolve as Linuxĭoes. The computer's memory for its own use, and user programs are not allowed to (For security and optimization reasons, the kernel reserves some portion of Of writing code to move data between kernel memory and user memory. Test out the mechanics of creating, inserting and removing a module, and Later labs will develop more complicated modules that look at kernel data We will take advantage of this capability to create a kernel module that willĮventually help us to peek inside the OS to find out what is going on. Typically this might be used to add a new device driver,Īnd in fact kernel modules look and act more or less like device drivers,Įven if they do not actually correspond to a physical device. ![]() Operating system while it is running, and can then interact with kernelĭata structures. This lab will go over the basics of writing a kernel module for Linux.Ī kernel module is a piece of code that can be added into the
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