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Aaron Allen
Aaron Allen

Windows Kernel Programming.pdf

The course will include advanced topics in Windows kernel development, and is recommended for those that were in my Windows Kernel Programming class or have equivalent knowledge; for example, by reading my book Windows Kernel Programming.

Windows Kernel Programming.pdf

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The book describes software kernel drivers programming for Windows. These drivers don't deal with hardware, but rather with the system itself: processes, threads, modules, registry and more. Kernel code can be used for monitoring important events, preventing some from occurring if needed. Various filters can be written that can intercept calls that a driver may be interested in.

This section includes general concepts to help you understand kernel-mode programming and describes specific techniques of kernel programming. For a general overview of Windows Drivers, see Getting Started with Windows Drivers, which provides a general overview of Windows components, lists the types of device drivers used in Windows, discusses the goals of Windows device drivers, and discusses generic sample device drivers included in the kit.

Memory Management for Windows Drivers illustrates how kernel-mode drivers allocate memory for purposes such as storing internal data, buffering data during I/O operations, and sharing memory with other kernel-mode and user-mode components.

Windows Management Instrumentation (WMI) are extensions to your kernel-mode driver, which enable your driver to become a WMI provider. A WMI provider makes measurement and instrumentation data available to WMI consumers, such as user-mode applications.

Launch WinDbg to connect to a kernel debug session on the target computer by using the following command. The value for the port and key should be the same as what you used to provision the target computer. We'll use 50000 for the port and for the key, the values we used during the deploy step. The k flag indicates that this is a kernel debug session.

On the Debug menu, choose Break. The debugger on the host computer will break into the target computer. In the Debugger Command window, you can see the kernel debugging command prompt: kd>.

WPS Office software is basically consistent of 4 components known as spreadsheet, PDF, writer and Presentation. These four features can also be performed using the Apple appliance like iPads and iPhones. WPS Office has made our lives easier by providing diverse features to edit a PDF file. You convert PDF file into excel spreadsheet, PowerPoint slides, image, word document, merge or split any PDF pages, edit any text content and e-sign your PDF documents. Go visit the WPS Office website now and edit your PDF files online. You can use the WPS Office on windows, Linux, mac, android and iOS mobile phones. For more features, visit the WPS Office website and download the WPS software to edit your PDF files now.

In order to edit PDF on iPad pro all you need to do is sign into your WPS Office software with the same ID account which you use on your iPads or iPhones. After this, you are able to continue with your work of previewing and editing the PDF files which you wish to edit. These files should be synced from the Mac in order to improve the efficiency. You can also get free access to WPS Office at any time and any place regardless of the device you are using like; iPad pro, mac, Linux, windows or android phones.

The kernel is a computer program at the core of a computer's operating system and generally has complete control over everything in the system.[1] It is the portion of the operating system code that is always resident in memory[2] and facilitates interactions between hardware and software components. A full kernel controls all hardware resources (e.g. I/O, memory, cryptography) via device drivers, arbitrates conflicts between processes concerning such resources, and optimizes the utilization of common resources e.g. CPU & cache usage, file systems, and network sockets. On most systems, the kernel is one of the first programs loaded on startup (after the bootloader). It handles the rest of startup as well as memory, peripherals, and input/output (I/O) requests from software, translating them into data-processing instructions for the central processing unit.

The critical code of the kernel is usually loaded into a separate area of memory, which is protected from access by application software or other less critical parts of the operating system. The kernel performs its tasks, such as running processes, managing hardware devices such as the hard disk, and handling interrupts, in this protected kernel space. In contrast, application programs such as browsers, word processors, or audio or video players use a separate area of memory, user space. This separation prevents user data and kernel data from interfering with each other and causing instability and slowness,[1] as well as preventing malfunctioning applications from affecting other applications or crashing the entire operating system. Even in systems where the kernel is included in application address spaces, memory protection is used to prevent unauthorized applications from modifying the kernel.

There are different kernel architecture designs. Monolithic kernels run entirely in a single address space with the CPU executing in supervisor mode, mainly for speed. Microkernels run most but not all of their services in user space,[3] like user processes do, mainly for resilience and modularity.[4] MINIX 3 is a notable example of microkernel design. Instead, the Linux kernel is monolithic, although it is also modular, for it can insert and remove loadable kernel modules at runtime.

This central component of a computer system is responsible for executing programs. The kernel takes responsibility for deciding at any time which of the many running programs should be allocated to the processor or processors.

Random-access memory (RAM) is used to store both program instructions and data.[a] Typically, both need to be present in memory in order for a program to execute. Often multiple programs will want access to memory, frequently demanding more memory than the computer has available. The kernel is responsible for deciding which memory each process can use, and determining what to do when not enough memory is available.

I/O devices include such peripherals as keyboards, mice, disk drives, printers, USB devices, network adapters, and display devices. The kernel allocates requests from applications to perform I/O to an appropriate device and provides convenient methods for using the device (typically abstracted to the point where the application does not need to know implementation details of the device).

Key aspects necessary in resource management are defining the execution domain (address space) and the protection mechanism used to mediate access to the resources within a domain.[5] Kernels also provide methods for synchronization and inter-process communication (IPC). These implementations may be located within the kernel itself or the kernel can also rely on other processes it is running. Although the kernel must provide IPC in order to provide access to the facilities provided by each other, kernels must also provide running programs with a method to make requests to access these facilities. The kernel is also responsible for context switching between processes or threads.

The kernel has full access to the system's memory and must allow processes to safely access this memory as they require it. Often the first step in doing this is virtual addressing, usually achieved by paging and/or segmentation. Virtual addressing allows the kernel to make a given physical address appear to be another address, the virtual address. Virtual address spaces may be different for different processes; the memory that one process accesses at a particular (virtual) address may be different memory from what another process accesses at the same address. This allows every program to behave as if it is the only one (apart from the kernel) running and thus prevents applications from crashing each other.[6]

On many systems, a program's virtual address may refer to data which is not currently in memory. The layer of indirection provided by virtual addressing allows the operating system to use other data stores, like a hard drive, to store what would otherwise have to remain in main memory (RAM). As a result, operating systems can allow programs to use more memory than the system has physically available. When a program needs data which is not currently in RAM, the CPU signals to the kernel that this has happened, and the kernel responds by writing the contents of an inactive memory block to disk (if necessary) and replacing it with the data requested by the program. The program can then be resumed from the point where it was stopped. This scheme is generally known as demand paging.

Virtual addressing also allows creation of virtual partitions of memory in two disjointed areas, one being reserved for the kernel (kernel space) and the other for the applications (user space). The applications are not permitted by the processor to address kernel memory, thus preventing an application from damaging the running kernel. This fundamental partition of memory space has contributed much to the current designs of actual general-purpose kernels and is almost universal in such systems, although some research kernels (e.g., Singularity) take other approaches.

To perform useful functions, processes need access to the peripherals connected to the computer, which are controlled by the kernel through device drivers. A device driver is a computer program encapsulating, monitoring and controlling a hardware device (via its Hardware/Software Interface (HSI)) on behalf of the OS. It provides the operating system with an API, procedures and information about how to control and communicate with a certain piece of hardware. Device drivers are an important and vital dependency for all OS and their applications. The design goal of a driver is abstraction; the function of the driver is to translate the OS-mandated abstract function calls (programming calls) into device-specific calls. In theory, a device should work correctly with a suitable driver. Device drivers are used for e.g. video cards, sound cards, printers, scanners, modems, and Network cards. 041b061a72


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