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[NTOSKRNL]

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Fix a bug in MmGetPhysicalAddress, that resulted in unwanted sign extension of physical addresses > 2GB. Will hopefully fix some uniata related issues.

svn path=/trunk/; revision=62482
This commit is contained in:
Timo Kreuzer 2014-03-11 22:56:31 +00:00
parent 7ceac2f6a4
commit a0173baa19
1 changed files with 2 additions and 2 deletions
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4
reactos/ntoskrnl/mm/ARM3/virtual.c
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@ -5283,7 +5283,7 @@ MmGetPhysicalAddress(PVOID Address)
if (TempPde.u.Hard.LargePage) if (TempPde.u.Hard.LargePage)
{ {
/* Physical address is base page + large page offset */ /* Physical address is base page + large page offset */
PhysicalAddress.QuadPart = TempPde.u.Hard.PageFrameNumber << PAGE_SHIFT; PhysicalAddress.QuadPart = (ULONG64)TempPde.u.Hard.PageFrameNumber << PAGE_SHIFT;
PhysicalAddress.QuadPart += ((ULONG_PTR)Address & (PAGE_SIZE * PTE_PER_PAGE - 1)); PhysicalAddress.QuadPart += ((ULONG_PTR)Address & (PAGE_SIZE * PTE_PER_PAGE - 1));
return PhysicalAddress; return PhysicalAddress;
} }
@ -5293,7 +5293,7 @@ MmGetPhysicalAddress(PVOID Address)
if (TempPte.u.Hard.Valid) if (TempPte.u.Hard.Valid)
{ {
/* Physical address is base page + page offset */ /* Physical address is base page + page offset */
PhysicalAddress.QuadPart = TempPte.u.Hard.PageFrameNumber << PAGE_SHIFT; PhysicalAddress.QuadPart = (ULONG64)TempPte.u.Hard.PageFrameNumber << PAGE_SHIFT;
PhysicalAddress.QuadPart += ((ULONG_PTR)Address & (PAGE_SIZE - 1)); PhysicalAddress.QuadPart += ((ULONG_PTR)Address & (PAGE_SIZE - 1));
return PhysicalAddress; return PhysicalAddress;
} }