SourceLevelDebugPkg/DebugAgent: Add typecast to fix sign extension

[mirror_edk2.git] / SourceLevelDebugPkg / Library / DebugAgent / DxeDebugAgent / DxeDebugAgentLib.c

diff --git a/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c b/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
index f7fbb3ccfaf49a64cb7da37ef2edea02e7bf3492..35fb5e645029e1cbfab6ad3f338c2ac01da54b5a 100644 (file)
--- a/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
+++ b/SourceLevelDebugPkg/Library/DebugAgent/DxeDebugAgent/DxeDebugAgentLib.c
@@ -512,7 +512,7 @@ InitializeDebugAgent (
       Ia32Idtr =  (IA32_DESCRIPTOR *) Context;\r
       Ia32IdtEntry = (IA32_IDT_ENTRY *)(Ia32Idtr->Base);\r
       MailboxLocation = (UINT64 *) (UINTN) (Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetLow +\r
-                                           (Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetHigh << 16));\r
+                                  (UINT32) (Ia32IdtEntry[DEBUG_MAILBOX_VECTOR].Bits.OffsetHigh << 16));\r
       Mailbox = (DEBUG_AGENT_MAILBOX *)(UINTN)(*MailboxLocation);\r
       VerifyMailboxChecksum (Mailbox);\r
     }\r