Try freeing IVT memory area in case it has already been allocated.

manatails · Aug 10, 2020 · 84a6807 · 84a6807
1 parent 3c16e04
commit 84a6807
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Showing 2 changed files with 9 additions and 1 deletion.
diff --git a/MdeModulePkg/Application/UefiSeven/UefiSeven.c b/MdeModulePkg/Application/UefiSeven/UefiSeven.c
@@ -57,12 +57,18 @@ UefiMain (
 	EFI_PHYSICAL_ADDRESS	IvtAddress;
 	EFI_STATUS				Status;
 	EFI_STATUS				IvtAllocationStatus;
+	EFI_STATUS				IvtFreeStatus;
 	EFI_INPUT_KEY			Key;
 	CHAR16					*LaunchPath = NULL;
 	CHAR16					*EfiFilePath = NULL;
 	CHAR16					*VerboseFilePath = NULL;
 	CHAR16					*SkipFilePath = NULL;
 
+	//
+	// Try freeing IVT memory area in case it has already been allocated.
+	//
+	IvtFreeStatus = gBS->FreePages(IVT_ADDRESS, 1);
+
 	//
 	// Claim real mode IVT memory area before any allocation can
 	// grab it. This can be done as the IDT has already been
@@ -71,6 +77,8 @@ UefiMain (
 	IvtAddress = IVT_ADDRESS;
 	IvtAllocationStatus = gBS->AllocatePages(AllocateAddress, EfiBootServicesCode, 1, &IvtAddress);
 
+	PrintDebug(L"Force free IVT area result: %r\n", IvtFreeStatus);
+
 	//
 	// Initialization.
 	//

diff --git a/MdeModulePkg/Application/UefiSeven/Version.h b/MdeModulePkg/Application/UefiSeven/Version.h
@@ -16,6 +16,6 @@
 #ifndef __VERSION_H
 #define __VERSION_H
 
-#define	VERSION	L"1.22"
+#define	VERSION	L"1.23"
 
 #endif