[ros-diffs] [fireball] 32471: - Do not *silently* hardcode USER_SHARED_DATA to physical page 2! It's purely FreeLdr's decision to place PCR on the page 1. Instead, rely on an assumption that shared data always follows PCR's page. NT relies on the same assumption.

Author: fireball
Date: Sun Feb 24 21:03:17 2008
New Revision: 32471

URL: http://svn.reactos.org/svn/reactos?rev=32471&view=rev
Log:
- Do not *silently* hardcode USER_SHARED_DATA to physical page 2! It's purely
FreeLdr's decision to place PCR on the page 1. Instead, rely on an assumption that
shared data always follows PCR's page. NT relies on the same assumption.

Modified:
    trunk/reactos/ntoskrnl/mm/mminit.c

Modified: trunk/reactos/ntoskrnl/mm/mminit.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/mm/mminit.c?rev=3…
==============================================================================
--- trunk/reactos/ntoskrnl/mm/mminit.c (original)
+++ trunk/reactos/ntoskrnl/mm/mminit.c Sun Feb 24 21:03:17 2008
@@ -182,7 +182,10 @@
                       TRUE,
                       0,
                       BoundaryAddressMultiple);
-   MmSharedDataPagePhysicalAddress.QuadPart = 2 << PAGE_SHIFT;
+
+   /* Shared data are always located the next page after PCR */
+   MmSharedDataPagePhysicalAddress = MmGetPhysicalAddress((PVOID)PCR);
+   MmSharedDataPagePhysicalAddress.QuadPart += PAGE_SIZE;
 
    /*
     *