• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint

The NT Executive

During the course of this discussion, we've referred several times to the NT Executive. Although you might have thought we were talking about you, we weren't. Nope. Next to the kernel (and we're not talking about KFC), the Executive is the heart of NT's architecture. It's the top cop, and it includes everything except the protected-mode subsystems and the actual hardware.

If you haven't been put to sleep already, it's time for a little review. As you might remember, the operating system code can run in two modes: user (unprivileged) mode and kernel (privileged) mode. Recall also that all the subsystems (such as the Win32, DOS, POSIX, and OS/2 environment subsystems and the security) run in user mode. By contrast, the NT Executive runs in kernel mode. Table 2.1 shows the breakdown.


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint