Search results
Results From The WOW.Com Content Network
The Windows NT kernel is a hybrid kernel; the architecture comprises a simple kernel, hardware abstraction layer (HAL), drivers, and a range of services (collectively named Executive), which all exist in kernel mode. [1] User mode in Windows NT is made of subsystems capable of passing I/O requests to the appropriate kernel mode device drivers ...
The Windows NT operating system family's architecture consists of two layers (user mode and kernel mode), with many different modules within both of these layers.One prominent example of a hybrid kernel is the Microsoft Windows NT kernel that powers all operating systems in the Windows NT family, up to and including Windows 11 and Windows Server 2022, and powers Windows Phone 8, Windows Phone ...
This subsystem implements only the POSIX.1 standard – also known as IEEE Std 1003.1-1990 or ISO/IEC 9945-1:1990 – primarily covering the kernel and C library programming interfaces which allowed a program written for other POSIX.1-compliant operating systems to be compiled and run under Windows NT. The Windows NT POSIX subsystem did not ...
When called from ntdll.dll in user mode, these groups are almost exactly the same; they execute an interrupt into kernel mode and call the equivalent function in ntoskrnl.exe via the SSDT. When calling the functions directly in ntoskrnl.exe (only possible in kernel mode), the Zw variants ensure kernel mode, whereas the Nt variants do not. [1]
The Session Manager Subsystem is the first user-mode process started by the kernel. Once started it creates additional paging files with configuration data from HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management, [1] the environment variables located at the registry entry HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Environment, and DOS device mappings (e.g. CON ...
in-kernel Remote Desktop Linux Linux framebuffer (fbdev) / Direct Rendering Manager: Kernel Mode Setting: DRM sched [70] DMA-BUF: No Windows NT kernel Dxgkrnl.sys VidPN Manager in Dxgkrnl.sys [71] VidSch in Dxgkrnl [72] VidMm in Dxgkrnl.sys, Dxgmms1.sys, and Dxgmms2.sys [73] RdpDD.sys / RdpWD.sys
Configuration Manager, the kernel mode side of Windows Registry: Dbg: Dbg: Debugging aid functions, such as a software break point Dbgk: Dbgk A set of debugging functions that are being exposed to user mode through ntdll.dll Ex: Exp: Windows executive, an "outer layer" of ntoskrnl.exe: FsRtl: FsRtlp: File system runtime library [3] Io: Iop: I/O ...
I/O request packets (IRPs) are kernel mode structures that are used by Windows Driver Model (WDM) and Windows NT device drivers to communicate with each other and with the operating system. They are data structures that describe I/O requests, and can be equally well thought of as "I/O request descriptors" or similar.