Bugtraq mailing list archives
Re: win32/memory locking (Re: Reply to EFS note on Bugtraq)
From: Keith Ray <aphex () NULLIFY ORG>
Date: Wed, 24 Jan 2001 14:02:27 -0600
Quoting James Perry <jeperry () UWATERLOO CA>:
As described on the MSDN site: "The AllocateUserPhysicalPages function is used to allocate physical memory. Memory allocated by this function must be physically present in the system. Once allocated, it is locked down and unavailable to the rest of the virtual memory management system of Windows 2000." _http://msdn.microsoft.com/library/psdk/winbase/memman_0u5v.htm_ The UserPhysicalPages class of functions appear to be directly related to kernel calls, so I'd take a guess and say it's probably what you're looking for. - James Perry
AllocateUserPhysicalPages() is only available on Windows 2000. VirtualAlloc() with the PAGE_NOCACHE flag is available for Windows NT 3.1+ and Windows 95+.
From the MSDN Library:
PAGE_NOCACHE - Allows no caching of the committed regions of pages. The hardware attributes for the physical memory should be specified as "no cache." This is not recommended for general usage. It is useful for device drivers; for example, mapping a video frame buffer with no caching. This value is a page protection modifier, and it is only valid when used with one of the page protections other than PAGE_NOACCESS. -------------------------------------------------------------------- Keith Ray aphex () nullify org http://www.nullify.org PGP - 0xAE1B3529 - 8227 60E5 BAA5 9461 CAB3 A6F2 4DFE F573 AE1B 3529
Current thread:
- Reply to EFS note on Bugtraq Ryan Russell (Jan 23)
- win32/memory locking (Re: Reply to EFS note on Bugtraq) Peter W (Jan 23)
- Re: win32/memory locking (Re: Reply to EFS note on Bugtraq) James Perry (Jan 24)
- Re: win32/memory locking (Re: Reply to EFS note on Bugtraq) Keith Ray (Jan 24)
- Re: win32/memory locking (Re: Reply to EFS note on Bugtraq) James Perry (Jan 24)
- win32/memory locking (Re: Reply to EFS note on Bugtraq) Peter W (Jan 23)