Virtual Address Space Layouts
This section describes the components in the user and system address space, followed by the specific layouts on 32-bit and 64-bit systems. This information helps you to understand the limits on process and system virtual memory on both platforms.
Three main types of data are mapped into the virtual address space in Windows: per-process private code and data, sessionwide code and data, and systemwide code and data.
As explained in Chapter 1 in Part 1, each process has a private address space that cannot be accessed by other processes. That is, a virtual address is always evaluated in the context of the current process and cannot refer to an address defined by any other process. Threads within the process can therefore ...