Windows architecture tutorial

Pavan Lalwani. Trevoir Williams. Fettah Ben. Total Seminars. Brandon Dennis. Those addresses are then sent into the paging unit to be translated into physical addresses. This is because the other half is reserved for kernel code: the program can thus use, at most, 2GB of memory.

Because each process has its own page directory table that is used to translate the linear address to physical address, two processes can use the same linear address, while their physical address is different. Okay, so each program has its own address space reserved only for that process, but what about the kernel space?

Actually, the kernel is loaded only once in memory and each program must use it. This is why each process needs appropriate pointers set-up that do just that.

It means that the PDEs stored in the page directory of every process point to the same kernel page table. If we would like to run our own code in kernel memory, we must first find a way to pass the code to the kernel and stay there. Windows is an operating system designed by Microsoft. The operating system is what allows you to use a computer. Windows comes preloaded on most new personal computers PCs , which helps to make it the most popular operating system in the world.

Windows makes it possible to complete all types of everyday tasks on your computer. A thread lives in a process, and executes the instructions of the program. The diagram below which is in the Windows Internals book shows how the components interact. The thread is what Windows schedules for execution within a process. Without threads, the program used by the process cannot run. Threads consist of the following components:.