System Calls in deep

🎉 Linux Kernel Programming - System Calls Mastery 🧠

Unlock the Secrets of Linux Internals!

Are you ready to dive into the core of Linux operating system and explore the intricacies of system calls? Our comprehensive course, "System Calls in deep," is meticulously crafted for those who aspire to master Linux kernel programming. 🌱

Course Overview:

What will you learn from this course?

• Basics of Inline Assembly: Understand the foundational aspects of inline assembly and how it's used within the Linux kernel. 🏗️

• Types of Inline Assembly: Get familiar with both Basic and Extended asm statements, and their specific use cases. 🔍

• GCC Assembly Syntax: Master the AT&T syntax, which is crucial for writing assembly code in Linux kernel development. 📝

• Constraint strings: Learn how to define constraints to control the registers that GCC can use. 🛠️

• Input and output operands: Dive into the specifics of how input and output operands are handled in assembly code. 🔄

• Clobbering: Understand what clobbering is and how it affects your assembly code's behavior. ⚠️

Inline Assembly & Linux Kernel Integration:

• Use Cases of Inline Assembly in Linux kernel: Explore a variety of scenarios including interrupt handling, I/O Port operations, atomic operations, CPUID queries, and accessing control registers. 🌐

• Deep understanding of system calls: Learn the different mechanisms for switching from user space to kernel space such as int $0x80, sysenter/sysexit, syscall/sysret, and their implications. 🚀

• VDSO (Very Dynamic Shared Object): Discover how VDSO is used to provide high-speed access to certain system calls. 🎯

• Adding a New System Call: Step-by-step guidance on how to define and implement new system calls, with and without arguments. 🛠️

• Kernel Symbols and Kernel Symbol table: Gain insights into managing kernel symbols and understanding the symbol table for effective kernel module development. 🔎

• Writing Kernel Modules: Learn how to write modules that overwrite the kernel symbol table and sniff parameters passed to system calls. 📜

Practical Examples & Real-World Applications:

Examples covered in this course:

• Mathematical Operations in Inline Assembly: Perform arithmetic operations like adding, subtracting, multiplying, and dividing using inline assembly. 📚

• Disabling/Enabling Interrupts: Learn whether it's possible to manage interrupts from user space and how to check their status. 🛣️

• Implementing Locking Mechanisms: Understand the basics of implementing simple locking to prevent race conditions using lock prefixes and compare and exchange instructions. 🌧️

Why Take This Course?

By enrolling in "System Calls in deep," you'll gain:

• Hands-On Experience: Apply your knowledge with practical examples and real-world scenarios.

• Deep Knowledge: Get an in-depth understanding of the Linux kernel, system calls, and kernel programming. 🔧

• Skill Enhancement: Sharpen your assembly language skills and apply them within the context of Linux kernel development.

• Expertise: Transform your approach to debugging, optimizing, and developing kernel modules with confidence. 🎯

Don't miss this opportunity to become a Linux Kernel Programming expert! Enroll now and take the first step towards mastering system calls in the heart of Linux. 🌟