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Ensure page map structures are self-mapped
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This commit is contained in:
Aiken Harris
2025-12-29 10:56:43 +01:00
parent 7cb3d1764b
commit 28f49dd545
1 changed files with 9 additions and 1 deletions
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10
boot/xtldr/arch/amd64/memory.cc
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@@ -44,6 +44,14 @@ Memory::BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap,
return Status; return Status;
} }
/* Add new memory mapping for the page map itself */
Status = MapVirtualMemory(PageMap, (PVOID)(UINT_PTR)Address, (PVOID)(UINT_PTR)Address, 1, LoaderMemoryData);
if(Status != STATUS_EFI_SUCCESS)
{
/* Memory mapping failure */
return Status;
}
/* Assign and zero-fill memory used by page mappings */ /* Assign and zero-fill memory used by page mappings */
PageMap->PtePointer = (PVOID)(UINT_PTR)Address; PageMap->PtePointer = (PVOID)(UINT_PTR)Address;
RTL::Memory::ZeroMemory(PageMap->PtePointer, EFI_PAGE_SIZE); RTL::Memory::ZeroMemory(PageMap->PtePointer, EFI_PAGE_SIZE);
@@ -193,7 +201,7 @@ Memory::GetNextPageTable(IN PXTBL_PAGE_MAPPING PageMap,
} }
/* Add new memory mapping */ /* Add new memory mapping */
Status = MapVirtualMemory(PageMap, NULLPTR, (PVOID)(UINT_PTR)Address, 1, LoaderMemoryData); Status = MapVirtualMemory(PageMap, (PVOID)(UINT_PTR)Address, (PVOID)(UINT_PTR)Address, 1, LoaderMemoryData);
if(Status != STATUS_EFI_SUCCESS) if(Status != STATUS_EFI_SUCCESS)
{ {
/* Memory mapping failure */ /* Memory mapping failure */