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fix a bug in PerformBaseRelocation #116

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fix a bug in PerformBaseRelocation #116

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fix a bug in PerformBaseRelocation
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@H4ckF0rFun
H4ckF0rFun committed Jan 3, 2024
commit dabd353bbeac1db15199d75b7712c49940e544e0
8 changes: 7 additions & 1 deletion MemoryModule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -382,18 +382,24 @@ static BOOL
PerformBaseRelocation(PMEMORYMODULE module, ptrdiff_t delta)
{
unsigned char *codeBase = module->codeBase;
DWORD relocation_size;
PIMAGE_BASE_RELOCATION relocation;

PIMAGE_DATA_DIRECTORY directory = GET_HEADER_DICTIONARY(module, IMAGE_DIRECTORY_ENTRY_BASERELOC);
if (directory->Size == 0) {
return (delta == 0);
}

relocation_size = directory->Size;
relocation = (PIMAGE_BASE_RELOCATION) (codeBase + directory->VirtualAddress);
for (; relocation->VirtualAddress > 0; ) {

for (;relocation_size; ) {
DWORD i;
unsigned char *dest = codeBase + relocation->VirtualAddress;
unsigned short *relInfo = (unsigned short*) OffsetPointer(relocation, IMAGE_SIZEOF_BASE_RELOCATION);

relocation_size -= relocation->SizeOfBlock;

for (i=0; i<((relocation->SizeOfBlock-IMAGE_SIZEOF_BASE_RELOCATION) / 2); i++, relInfo++) {
// the upper 4 bits define the type of relocation
int type = *relInfo >> 12;
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