MdeModulePkg/DxeIplPeim: reserve page 0 for NULL pointer detection

[mirror_edk2.git] / MdeModulePkg / Core / DxeIplPeim / Ia32 / DxeLoadFunc.c

diff --git a/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c b/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c
index 172d7cd1c60ccfebd3b7c48796078c9be9b94fa4..6e8ca824d469e9db51405fc673c41d539e750436 100644 (file)
--- a/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c
+++ b/MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c
@@ -246,8 +246,12 @@ HandOffToDxeCore (
   EFI_PEI_VECTOR_HANDOFF_INFO_PPI *VectorHandoffInfoPpi;\r
   BOOLEAN                   BuildPageTablesIa32Pae;\r
 \r
+  //\r
+  // Clear page 0 and mark it as allocated if NULL pointer detection is enabled.\r
+  //\r
   if (IsNullDetectionEnabled ()) {\r
     ClearFirst4KPage (HobList.Raw);\r
+    BuildMemoryAllocationHob (0, EFI_PAGES_TO_SIZE (1), EfiBootServicesData);\r
   }\r
 \r
   Status = PeiServicesAllocatePages (EfiBootServicesData, EFI_SIZE_TO_PAGES (STACK_SIZE), &BaseOfStack);\r