SourceLevelDebugPkg/DebugAgent: Add typecast to fix sign extension

[mirror_edk2.git] / SourceLevelDebugPkg / Library / DebugAgent / SecPeiDebugAgent / SecPeiDebugAgentLib.c

diff --git a/SourceLevelDebugPkg/Library/DebugAgent/SecPeiDebugAgent/SecPeiDebugAgentLib.c b/SourceLevelDebugPkg/Library/DebugAgent/SecPeiDebugAgent/SecPeiDebugAgentLib.c
index e77ff723e3fd91d7bff7e629d55027b7cd992124..fcc7a4baf8d3c7c93c9b1d93f69813db262235ef 100644 (file)
--- a/SourceLevelDebugPkg/Library/DebugAgent/SecPeiDebugAgent/SecPeiDebugAgentLib.c
+++ b/SourceLevelDebugPkg/Library/DebugAgent/SecPeiDebugAgent/SecPeiDebugAgentLib.c
@@ -579,7 +579,7 @@ InitializeDebugAgent (
       Ia32Idtr =  (IA32_DESCRIPTOR *) Context;\r
       Ia32IdtEntry = (IA32_IDT_ENTRY *)(Ia32Idtr->Base);\r
       MailboxLocationPointer = (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)(*MailboxLocationPointer);\r
       //\r
       // Mailbox should valid and setup before executing thunk code\r