Book Image

Mastering Linux Kernel Development

By : CH Raghav Maruthi
Book Image

Mastering Linux Kernel Development

By: CH Raghav Maruthi

Overview of this book

Mastering Linux Kernel Development looks at the Linux kernel, its internal arrangement and design, and various core subsystems, helping you to gain significant understanding of this open source marvel. You will look at how the Linux kernel, which possesses a kind of collective intelligence thanks to its scores of contributors, remains so elegant owing to its great design. This book also looks at all the key kernel code, core data structures, functions, and macros, giving you a comprehensive foundation of the implementation details of the kernel’s core services and mechanisms. You will also look at the Linux kernel as well-designed software, which gives us insights into software design in general that are easily scalable yet fundamentally strong and safe. By the end of this book, you will have considerable understanding of and appreciation for the Linux kernel.
Table of Contents (19 chapters)
Title Page
About the Author
About the Reviewer
Customer Feedback

Interrupt signals and vectors

When an interrupt originates from an external device, it is referred to as a hardware interrupt. These signals are generated by external hardware to seek the attention of the processor on occurrence of a significant external event, for instance a key hit on the keyboard, a click on a mouse button, or moving the mouse trigger hardware interrupts through which the processor is notified about the availability of data to be read. Hardware interrupts occur asynchronously with respect to the processor clock (meaning they can occur at random times), and hence are also termed as asynchronous interrupts.

Interrupts triggered from within the CPU due to events generated by program instructions currently in execution are referred to as software interrupts. A software interruptis caused either by an exception triggered by program instructions currently in execution or on execution of a privileged instruction that raises an interrupt. For instance, when a program instruction...