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- Hack away LdrVerifyMappedImageMatchesChecksum() invocations with zero ImageSize until MM is fixed.
- Implement a helper ChkSum() routine to be used later by LdrVerifyMappedImageMatchesChecksum().

svn path=/trunk/; revision=51061
This commit is contained in:
Aleksey Bragin
2011-03-16 11:58:12 +00:00
parent cfec4ed826
commit 8f7c38cd44
1 changed files with 24 additions and 2 deletions
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reactos/lib/rtl/image.c
+24 -2
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@@ -20,6 +20,25 @@
/* FUNCTIONS *****************************************************************/
USHORT
FORCEINLINE
ChkSum(ULONG Sum, PUSHORT Src, ULONG Len)
{
ULONG i;
for (i=0; i<Len; i++)
{
/* Sum up the current word */
Sum += Src[i];
/* Sum up everything above the low word as a carry */
Sum = (Sum & 0xFFFF) + (Sum >> 16);
}
/* Apply carry one more time and clamp to the USHORT */
return (Sum + (Sum >> 16)) & 0xFFFF;
}
BOOLEAN
NTAPI
LdrVerifyMappedImageMatchesChecksum(
@@ -34,8 +53,11 @@ LdrVerifyMappedImageMatchesChecksum(
ULONG HeaderSum;
ULONG i;
// HACK: Ignore calls with ImageSize=0. Should be fixed by new MM.
if (ImageSize == 0) return TRUE;
/* Get NT header to check if it's an image at all */
Header = RtlImageNtHeader (BaseAddress);
Header = RtlImageNtHeader(BaseAddress);
if (!Header) return FALSE;
/* Get checksum to match */
@@ -93,7 +115,7 @@ LdrVerifyMappedImageMatchesChecksum(
CalcSum += ImageSize;
if (CalcSum != HeaderSum)
DPRINT1("Image %p checksum mismatches! 0x%x != 0x%x\n", BaseAddress, CalcSum, HeaderSum);
DPRINT1("Image %p checksum mismatches! 0x%x != 0x%x, ImageSize %x, FileLen %x\n", BaseAddress, CalcSum, HeaderSum, ImageSize, FileLength);
return (BOOLEAN)(CalcSum == HeaderSum);
}