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Better address check

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This commit is contained in:
Alex 2022-11-11 04:41:37 +02:00
parent 08ab104eb1
commit 5f320bcf25
Signed by untrusted user who does not match committer: enderice2
GPG Key ID: EACC3AD603BAB4DD
1 changed files with 27 additions and 1 deletions
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28
Core/Memory/VirtualMemoryManager.cpp
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@ -13,7 +13,33 @@ namespace Memory
PageMapIndexer Index = PageMapIndexer((uint64_t)Address);
PageDirectoryEntry PDE = this->Table->Entries[Index.PDPIndex];
return PDE.GetFlag(Flag);
PageTable *PDP = nullptr;
PageTable *PD = nullptr;
PageTable *PT = nullptr;
if (PDE.GetFlag(Flag))
PDP = (PageTable *)((uint64_t)PDE.GetAddress() << 12);
else
return false;
PDE = PDP->Entries[Index.PDIndex];
if (PDE.GetFlag(Flag))
PD = (PageTable *)((uint64_t)PDE.GetAddress() << 12);
else
return false;
PDE = PD->Entries[Index.PTIndex];
if (PDE.GetFlag(Flag))
PT = (PageTable *)((uint64_t)PDE.GetAddress() << 12);
else
return false;
PDE = PT->Entries[Index.PIndex];
if (PDE.GetFlag(Flag))
return true;
else
return false;
return false;
}
void Virtual::Map(void *VirtualAddress, void *PhysicalAddress, uint64_t Flags)