ShellPkg: Eliminate loss of high bits in return value from exit command on 64 bit platform.

submitted-by: jcarsey
reviewed-by:  gookboy15a
reviewed-by:  niruiyu

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12356 6f19259b-4bc3-4df7-8a09-765794883524

ShellPkg/Application/Shell/Shell.c

@@ -475,6 +475,9 @@ UefiMain (
     DEBUG_CODE(ShellInfoObject.ConsoleInfo = NULL;);
   }
 
+  if (ShellCommandGetExit()) {
+    return ((EFI_STATUS)ShellCommandGetExitCode());
+  }
   return (Status);
 }
 
@@ -1622,6 +1625,7 @@ RunScriptFileHandle (
   BOOLEAN             PreCommandEchoState;
   CONST CHAR16        *CurDir;
   UINTN               LineCount;
+  CHAR16              LeString[50];
 
   ASSERT(!ShellCommandGetScriptExit());
 
@@ -1826,7 +1830,11 @@ RunScriptFileHandle (
         }
 
         if (ShellCommandGetScriptExit()) {
-          ShellCommandRegisterExit(FALSE);
+          UnicodeSPrint(LeString, sizeof(LeString)*sizeof(LeString[0]), L"0x%Lx", ShellCommandGetExitCode());
+          DEBUG_CODE(InternalEfiShellSetEnv(L"DebugLasterror", LeString, TRUE););
+          InternalEfiShellSetEnv(L"Lasterror", LeString, TRUE);
+
+          ShellCommandRegisterExit(FALSE, 0);
           Status = EFI_SUCCESS;
           break;
         }

ShellPkg/Include/Library/ShellCommandLib.h

@@ -340,11 +340,24 @@ ShellCommandSetEchoState (
   Indicate that the current shell or script should exit.
 
   @param[in] ScriptOnly   TRUE if exiting a script; FALSE otherwise.
+  @param[in] ErrorCode    The 64 bit error code to return.
 **/
 VOID
 EFIAPI
 ShellCommandRegisterExit (
-  IN BOOLEAN ScriptOnly
+  IN BOOLEAN      ScriptOnly,
+  IN CONST UINT64 ErrorCode
+  );
+
+/**
+  Retrieve the Exit code.
+
+  @return the value passed into RegisterExit.
+**/
+UINT64
+EFIAPI
+ShellCommandGetExitCode (
+  VOID
   );
 
 /**

ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.c

@@ -26,6 +26,7 @@ STATIC SCRIPT_FILE_LIST                   mScriptList;
 STATIC ALIAS_LIST                         mAliasList;
 STATIC BOOLEAN                            mEchoState;
 STATIC BOOLEAN                            mExitRequested;
+STATIC UINT64                             mExitCode;
 STATIC BOOLEAN                            mExitScript;
 STATIC CHAR16                             *mProfileList;
 STATIC UINTN                              mProfileListSize;
@@ -697,12 +698,14 @@ ShellCommandSetEchoState(
 /**
   Indicate that the current shell or script should exit.
 
-  @param[in] ScriptOnly   TRUE if only exiting a script, FALSE othrwise.
+  @param[in] ScriptOnly   TRUE if exiting a script; FALSE otherwise.
+  @param[in] ErrorCode    The 64 bit error code to return.
 **/
 VOID
 EFIAPI
 ShellCommandRegisterExit (
-  IN BOOLEAN ScriptOnly
+  IN BOOLEAN      ScriptOnly,
+  IN CONST UINT64 ErrorCode
   )
 {
   mExitRequested = (BOOLEAN)(!mExitRequested);
@@ -711,6 +714,7 @@ ShellCommandRegisterExit (
   } else {
     mExitScript    = FALSE;
   }
+  mExitCode = ErrorCode;
 }
 
 /**
@@ -728,6 +732,21 @@ ShellCommandGetExit (
   return (mExitRequested);
 }
 
+/**
+  Retrieve the Exit code.
+
+  If ShellCommandGetExit returns FALSE than the return from this is undefined.
+
+  @return the value passed into RegisterExit.
+**/
+UINT64
+EFIAPI
+ShellCommandGetExitCode (
+  VOID
+  )
+{
+  return (mExitCode);
+}
 /**
   Retrieve the Exit script indicator.
 

ShellPkg/Library/UefiShellLevel1CommandsLib/Exit.c

@@ -77,16 +77,16 @@ ShellCommandRunExit (
         //
         // If we are in a batch file and /b then pass TRUE otherwise false...
         //
-        ShellCommandRegisterExit((BOOLEAN)(gEfiShellProtocol->BatchIsActive() && ShellCommandLineGetFlag(Package, L"/b")));
+        ShellCommandRegisterExit((BOOLEAN)(gEfiShellProtocol->BatchIsActive() && ShellCommandLineGetFlag(Package, L"/b")), RetVal);
 
-        ShellStatus = (SHELL_STATUS)(RetVal);
+        ShellStatus = SHELL_SUCCESS;
       }
     } else {
       // If we are in a batch file and /b then pass TRUE otherwise false...
       //
-      ShellCommandRegisterExit((BOOLEAN)(gEfiShellProtocol->BatchIsActive() && ShellCommandLineGetFlag(Package, L"/b")));
+      ShellCommandRegisterExit((BOOLEAN)(gEfiShellProtocol->BatchIsActive() && ShellCommandLineGetFlag(Package, L"/b")), 0);
 
-      ShellStatus = (SHELL_STATUS)0;
+      ShellStatus = SHELL_SUCCESS;
     }
 
     ShellCommandLineFreeVarList (Package);

ShellPkg/Library/UefiShellLevel3CommandsLib/Pause.c

@@ -84,7 +84,7 @@ ShellCommandRunPause (
       }
 
       if (EFI_ERROR(Status) || Resp == NULL || *Resp == ShellPromptResponseQuit) {
-        ShellCommandRegisterExit(TRUE);
+        ShellCommandRegisterExit(TRUE, 0);
         ShellStatus = SHELL_ABORTED;
       }