Support call of SendForm() from Callback(), i.e. nested call of SendForm().

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9364 6f19259b-4bc3-4df7-8a09-765794883524

4 files changed, 298 insertions, 43 deletions

diff --git a/MdeModulePkg/Universal/SetupBrowserDxe/Setup.c b/MdeModulePkg/Universal/SetupBrowserDxe/Setup.c
index ae73f09..05e6905 100644
--- a/MdeModulePkg/Universal/SetupBrowserDxe/Setup.c
+++ b/MdeModulePkg/Universal/SetupBrowserDxe/Setup.c
@@ -29,6 +29,9 @@ EFI_HII_DATABASE_PROTOCOL         *mHiiDatabase;
 EFI_HII_STRING_PROTOCOL           *mHiiString;

 EFI_HII_CONFIG_ROUTING_PROTOCOL   *mHiiConfigRouting;

 

+UINTN           gBrowserContextCount = 0;

+LIST_ENTRY      gBrowserContextList = INITIALIZE_LIST_HEAD_VARIABLE (gBrowserContextList);

+

 BANNER_DATA           *gBannerData;

 EFI_HII_HANDLE        gFrontPageHandle;

 UINTN                 gClassOfVfr;

@@ -38,8 +41,6 @@ BOOLEAN               gNvUpdateRequired;
 EFI_HII_HANDLE        gHiiHandle;

 UINT16                gDirection;

 EFI_SCREEN_DESCRIPTOR gScreenDimensions;

-BOOLEAN               gUpArrow;

-BOOLEAN               gDownArrow;

 

 //

 // Browser Global Strings

@@ -85,7 +86,7 @@ EFI_GUID  gSetupBrowserGuid = {
   0xab368524, 0xb60c, 0x495b, {0xa0, 0x9, 0x12, 0xe8, 0x5b, 0x1a, 0xea, 0x32}

 };

 

-FORM_BROWSER_FORMSET  *gOldFormSet = NULL;

+FORM_BROWSER_FORMSET  *gOldFormSet;

 

 FUNCTIION_KEY_SETTING gFunctionKeySettingTable[] = {

   //

@@ -216,6 +217,11 @@ SendForm (
   UINTN                         Index;

   FORM_BROWSER_FORMSET          *FormSet;

 

+  //

+  // Save globals used by SendForm()

+  //

+  SaveBrowserContext ();

+

   Status = EFI_SUCCESS;

   ZeroMem (&gScreenDimensions, sizeof (EFI_SCREEN_DESCRIPTOR));

 

@@ -236,7 +242,8 @@ SendForm (
     if ((gScreenDimensions.RightColumn < ScreenDimensions->RightColumn) ||

         (gScreenDimensions.BottomRow < ScreenDimensions->BottomRow)

         ) {

-      return EFI_INVALID_PARAMETER;

+      Status = EFI_INVALID_PARAMETER;

+      goto Done;

     } else {

       //

       // Local dimension validation.

@@ -255,7 +262,8 @@ SendForm (
         ) {

         CopyMem (&gScreenDimensions, (VOID *) ScreenDimensions, sizeof (EFI_SCREEN_DESCRIPTOR));

       } else {

-        return EFI_INVALID_PARAMETER;

+        Status = EFI_INVALID_PARAMETER;

+        goto Done;

       }

     }

   }

@@ -287,6 +295,7 @@ SendForm (
       Selection->FormId = FormId;

     }

 

+    gOldFormSet = NULL;

     gNvUpdateRequired = FALSE;

 

     do {

@@ -338,6 +347,12 @@ SendForm (
   gST->ConOut->SetAttribute (gST->ConOut, EFI_TEXT_ATTR (EFI_LIGHTGRAY, EFI_BLACK));

   gST->ConOut->ClearScreen (gST->ConOut);

 

+Done:

+  //

+  // Restore globals used by SendForm()

+  //

+  RestoreBrowserContext ();

+

   return Status;

 }

 

@@ -2511,3 +2526,164 @@ InitializeFormSet (
 

   return Status;

 }

+

+

+/**

+  Save globals used by previous call to SendForm(). SendForm() may be called from 

+  HiiConfigAccess.Callback(), this will cause SendForm() be reentried.

+  So, save globals of previous call to SendForm() and restore them upon exit.

+

+**/

+VOID

+SaveBrowserContext (

+  VOID

+  )

+{

+  BROWSER_CONTEXT  *Context;

+

+  gBrowserContextCount++;

+  if (gBrowserContextCount == 1) {

+    //

+    // This is not reentry of SendForm(), no context to save

+    //

+    return;

+  }

+

+  Context = AllocatePool (sizeof (BROWSER_CONTEXT));

+  ASSERT (Context != NULL);

+

+  Context->Signature = BROWSER_CONTEXT_SIGNATURE;

+

+  //

+  // Save FormBrowser context

+  //

+  Context->BannerData           = gBannerData;

+  Context->ClassOfVfr           = gClassOfVfr;

+  Context->FunctionKeySetting   = gFunctionKeySetting;

+  Context->ResetRequired        = gResetRequired;

+  Context->NvUpdateRequired     = gNvUpdateRequired;

+  Context->Direction            = gDirection;

+  Context->FunctionNineString   = gFunctionNineString;

+  Context->FunctionTenString    = gFunctionTenString;

+  Context->EnterString          = gEnterString;

+  Context->EnterCommitString    = gEnterCommitString;

+  Context->EnterEscapeString    = gEnterEscapeString;

+  Context->EscapeString         = gEscapeString;

+  Context->SaveFailed           = gSaveFailed;

+  Context->MoveHighlight        = gMoveHighlight;

+  Context->MakeSelection        = gMakeSelection;

+  Context->DecNumericInput      = gDecNumericInput;

+  Context->HexNumericInput      = gHexNumericInput;

+  Context->ToggleCheckBox       = gToggleCheckBox;

+  Context->PromptForData        = gPromptForData;

+  Context->PromptForPassword    = gPromptForPassword;

+  Context->PromptForNewPassword = gPromptForNewPassword;

+  Context->ConfirmPassword      = gConfirmPassword;

+  Context->ConfirmError         = gConfirmError;

+  Context->PassowordInvalid     = gPassowordInvalid;

+  Context->PressEnter           = gPressEnter;

+  Context->EmptyString          = gEmptyString;

+  Context->AreYouSure           = gAreYouSure;

+  Context->YesResponse          = gYesResponse;

+  Context->NoResponse           = gNoResponse;

+  Context->MiniString           = gMiniString;

+  Context->PlusString           = gPlusString;

+  Context->MinusString          = gMinusString;

+  Context->AdjustNumber         = gAdjustNumber;

+  Context->SaveChanges          = gSaveChanges;

+  Context->OptionMismatch       = gOptionMismatch;

+  Context->PromptBlockWidth     = gPromptBlockWidth;

+  Context->OptionBlockWidth     = gOptionBlockWidth;

+  Context->HelpBlockWidth       = gHelpBlockWidth;

+  Context->OldFormSet           = gOldFormSet;

+  Context->MenuRefreshHead      = gMenuRefreshHead;

+

+  CopyMem (&Context->ScreenDimensions, &gScreenDimensions, sizeof (gScreenDimensions));

+  CopyMem (&Context->MenuOption, &gMenuOption, sizeof (gMenuOption));

+

+  //

+  // Insert to FormBrowser context list

+  //

+  InsertHeadList (&gBrowserContextList, &Context->Link);

+}

+

+

+/**

+  Restore globals used by previous call to SendForm().

+

+**/

+VOID

+RestoreBrowserContext (

+  VOID

+  )

+{

+  LIST_ENTRY       *Link;

+  BROWSER_CONTEXT  *Context;

+

+  ASSERT (gBrowserContextCount != 0);

+  gBrowserContextCount--;

+  if (gBrowserContextCount == 0) {

+    //

+    // This is not reentry of SendForm(), no context to restore

+    //

+    return;

+  }

+

+  ASSERT (!IsListEmpty (&gBrowserContextList));

+

+  Link = GetFirstNode (&gBrowserContextList);

+  Context = BROWSER_CONTEXT_FROM_LINK (Link);

+

+  //

+  // Restore FormBrowser context

+  //

+  gBannerData           = Context->BannerData;

+  gClassOfVfr           = Context->ClassOfVfr;

+  gFunctionKeySetting   = Context->FunctionKeySetting;

+  gResetRequired        = Context->ResetRequired;

+  gNvUpdateRequired     = Context->NvUpdateRequired;

+  gDirection            = Context->Direction;

+  gFunctionNineString   = Context->FunctionNineString;

+  gFunctionTenString    = Context->FunctionTenString;

+  gEnterString          = Context->EnterString;

+  gEnterCommitString    = Context->EnterCommitString;

+  gEnterEscapeString    = Context->EnterEscapeString;

+  gEscapeString         = Context->EscapeString;

+  gSaveFailed           = Context->SaveFailed;

+  gMoveHighlight        = Context->MoveHighlight;

+  gMakeSelection        = Context->MakeSelection;

+  gDecNumericInput      = Context->DecNumericInput;

+  gHexNumericInput      = Context->HexNumericInput;

+  gToggleCheckBox       = Context->ToggleCheckBox;

+  gPromptForData        = Context->PromptForData;

+  gPromptForPassword    = Context->PromptForPassword;

+  gPromptForNewPassword = Context->PromptForNewPassword;

+  gConfirmPassword      = Context->ConfirmPassword;

+  gConfirmError         = Context->ConfirmError;

+  gPassowordInvalid     = Context->PassowordInvalid;

+  gPressEnter           = Context->PressEnter;

+  gEmptyString          = Context->EmptyString;

+  gAreYouSure           = Context->AreYouSure;

+  gYesResponse          = Context->YesResponse;

+  gNoResponse           = Context->NoResponse;

+  gMiniString           = Context->MiniString;

+  gPlusString           = Context->PlusString;

+  gMinusString          = Context->MinusString;

+  gAdjustNumber         = Context->AdjustNumber;

+  gSaveChanges          = Context->SaveChanges;

+  gOptionMismatch       = Context->OptionMismatch;

+  gPromptBlockWidth     = Context->PromptBlockWidth;

+  gOptionBlockWidth     = Context->OptionBlockWidth;

+  gHelpBlockWidth       = Context->HelpBlockWidth;

+  gOldFormSet           = Context->OldFormSet;

+  gMenuRefreshHead      = Context->MenuRefreshHead;

+

+  CopyMem (&gScreenDimensions, &Context->ScreenDimensions, sizeof (gScreenDimensions));

+  CopyMem (&gMenuOption, &Context->MenuOption, sizeof (gMenuOption));

+

+  //

+  // Remove from FormBrowser context list

+  //

+  RemoveEntryList (&Context->Link);

+  gBS->FreePool (Context);

+}

diff --git a/MdeModulePkg/Universal/SetupBrowserDxe/Setup.h b/MdeModulePkg/Universal/SetupBrowserDxe/Setup.h
index 3fc7ed2..d375b21 100644
--- a/MdeModulePkg/Universal/SetupBrowserDxe/Setup.h
+++ b/MdeModulePkg/Universal/SetupBrowserDxe/Setup.h
@@ -443,6 +443,64 @@ typedef struct {
   LIST_ENTRY                      FormListHead;         // Form list (FORM_BROWSER_FORM)

 } FORM_BROWSER_FORMSET;

 

+#define BROWSER_CONTEXT_SIGNATURE  SIGNATURE_32 ('B', 'C', 'T', 'X')

+

+typedef struct {

+  UINTN                 Signature;

+  LIST_ENTRY            Link;

+

+  //

+  // Globals defined in Setup.c

+  //

+  BANNER_DATA           *BannerData;

+  UINTN                 ClassOfVfr;

+  UINTN                 FunctionKeySetting;

+  BOOLEAN               ResetRequired;

+  BOOLEAN               NvUpdateRequired;

+  UINT16                Direction;

+  EFI_SCREEN_DESCRIPTOR ScreenDimensions;

+  CHAR16                *FunctionNineString;

+  CHAR16                *FunctionTenString;

+  CHAR16                *EnterString;

+  CHAR16                *EnterCommitString;

+  CHAR16                *EnterEscapeString;

+  CHAR16                *EscapeString;

+  CHAR16                *SaveFailed;

+  CHAR16                *MoveHighlight;

+  CHAR16                *MakeSelection;

+  CHAR16                *DecNumericInput;

+  CHAR16                *HexNumericInput;

+  CHAR16                *ToggleCheckBox;

+  CHAR16                *PromptForData;

+  CHAR16                *PromptForPassword;

+  CHAR16                *PromptForNewPassword;

+  CHAR16                *ConfirmPassword;

+  CHAR16                *ConfirmError;

+  CHAR16                *PassowordInvalid;

+  CHAR16                *PressEnter;

+  CHAR16                *EmptyString;

+  CHAR16                *AreYouSure;

+  CHAR16                *YesResponse;

+  CHAR16                *NoResponse;

+  CHAR16                *MiniString;

+  CHAR16                *PlusString;

+  CHAR16                *MinusString;

+  CHAR16                *AdjustNumber;

+  CHAR16                *SaveChanges;

+  CHAR16                *OptionMismatch;

+  CHAR16                PromptBlockWidth;

+  CHAR16                OptionBlockWidth;

+  CHAR16                HelpBlockWidth;

+  FORM_BROWSER_FORMSET  *OldFormSet;

+

+  //

+  // Globals defined in Ui.c

+  //

+  LIST_ENTRY           MenuOption;

+  VOID                 *MenuRefreshHead;

+} BROWSER_CONTEXT;

+

+#define BROWSER_CONTEXT_FROM_LINK(a)  CR (a, BROWSER_CONTEXT, Link, BROWSER_CONTEXT_SIGNATURE)

 

 extern EFI_HII_DATABASE_PROTOCOL         *mHiiDatabase;

 extern EFI_HII_STRING_PROTOCOL           *mHiiString;

@@ -457,8 +515,6 @@ extern BOOLEAN               gNvUpdateRequired;
 extern EFI_HII_HANDLE        gHiiHandle;

 extern UINT16                gDirection;

 extern EFI_SCREEN_DESCRIPTOR gScreenDimensions;

-extern BOOLEAN               gUpArrow;

-extern BOOLEAN               gDownArrow;

 

 extern FORM_BROWSER_FORMSET  *gOldFormSet;

 

@@ -977,6 +1033,26 @@ GetIfrBinaryData (
   );

 

 /**

+  Save globals used by previous call to SendForm(). SendForm() may be called from 

+  HiiConfigAccess.Callback(), this will cause SendForm() be reentried.

+  So, save globals of previous call to SendForm() and restore them upon exit.

+

+**/

+VOID

+SaveBrowserContext (

+  VOID

+  );

+

+/**

+  Restore globals used by previous call to SendForm().

+

+**/

+VOID

+RestoreBrowserContext (

+  VOID

+  );

+

+/**

   This is the routine which an external caller uses to direct the browser

   where to obtain it's information.

 

diff --git a/MdeModulePkg/Universal/SetupBrowserDxe/Ui.c b/MdeModulePkg/Universal/SetupBrowserDxe/Ui.c
index 62c40e3..dacc472 100644
--- a/MdeModulePkg/Universal/SetupBrowserDxe/Ui.c
+++ b/MdeModulePkg/Universal/SetupBrowserDxe/Ui.c
@@ -15,7 +15,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include "Ui.h"

 #include "Setup.h"

 

-LIST_ENTRY          Menu;

+LIST_ENTRY          gMenuOption;

 LIST_ENTRY          gMenuList = INITIALIZE_LIST_HEAD_VARIABLE (gMenuList);

 MENU_REFRESH_ENTRY  *gMenuRefreshHead;

 

@@ -145,7 +145,7 @@ UiInitMenu (
   VOID

   )

 {

-  InitializeListHead (&Menu);

+  InitializeListHead (&gMenuOption);

 }

 

 

@@ -160,8 +160,8 @@ UiFreeMenu (
 {

   UI_MENU_OPTION  *MenuOption;

 

-  while (!IsListEmpty (&Menu)) {

-    MenuOption = MENU_OPTION_FROM_LINK (Menu.ForwardLink);

+  while (!IsListEmpty (&gMenuOption)) {

+    MenuOption = MENU_OPTION_FROM_LINK (gMenuOption.ForwardLink);

     RemoveEntryList (&MenuOption->Link);

 

     //

@@ -645,7 +645,7 @@ UiAddMenuOption (
       MenuOption->ReadOnly = TRUE;

     }

 

-    InsertTailList (&Menu, &MenuOption->Link);

+    InsertTailList (&gMenuOption, &MenuOption->Link);

   }

 

   return MenuOption;

@@ -1353,11 +1353,11 @@ ValueIsScroll (
 

   Temp = Direction ? CurrentPos->BackLink : CurrentPos->ForwardLink;

 

-  if (Temp == &Menu) {

+  if (Temp == &gMenuOption) {

     return TRUE;

   }

 

-  for (; Temp != &Menu; Temp = Direction ? Temp->BackLink : Temp->ForwardLink) {

+  for (; Temp != &gMenuOption; Temp = Direction ? Temp->BackLink : Temp->ForwardLink) {

     MenuOption = MENU_OPTION_FROM_LINK (Temp);

     if (IsSelectable (MenuOption)) {

       return FALSE;

@@ -1399,7 +1399,7 @@ MoveToNextStatement (
     if (IsSelectable (NextMenuOption)) {

       break;

     }

-    if ((GoUp ? Pos->BackLink : Pos->ForwardLink) == &Menu) {

+    if ((GoUp ? Pos->BackLink : Pos->ForwardLink) == &gMenuOption) {

       HitEnd = TRUE;

       break;

     }

@@ -1420,7 +1420,7 @@ MoveToNextStatement (
       if (IsSelectable (NextMenuOption)) {

         break;

       }

-      if ((!GoUp ? Pos->BackLink : Pos->ForwardLink) == &Menu) {

+      if ((!GoUp ? Pos->BackLink : Pos->ForwardLink) == &gMenuOption) {

         ASSERT (FALSE);

         break;

       }

@@ -1643,6 +1643,8 @@ UiDisplayMenu (
   BOOLEAN                         NewLine;

   BOOLEAN                         Repaint;

   BOOLEAN                         SavedValue;

+  BOOLEAN                         UpArrow;

+  BOOLEAN                         DownArrow;

   EFI_STATUS                      Status;

   EFI_INPUT_KEY                   Key;

   LIST_ENTRY                      *Link;

@@ -1679,8 +1681,8 @@ UiDisplayMenu (
   DefaultId           = 0;

 

   OutputString        = NULL;

-  gUpArrow            = FALSE;

-  gDownArrow          = FALSE;

+  UpArrow             = FALSE;

+  DownArrow           = FALSE;

   SkipValue           = 0;

   OldSkipValue        = 0;

   MenuRefreshEntry    = gMenuRefreshHead;

@@ -1708,7 +1710,7 @@ UiDisplayMenu (
   Selection->OptionCol = gPromptBlockWidth + 1 + LocalScreen.LeftColumn;

   Selection->Statement = NULL;

 

-  TopOfScreen = Menu.ForwardLink;

+  TopOfScreen = gMenuOption.ForwardLink;

   Repaint     = TRUE;

   MenuOption  = NULL;

 

@@ -1734,7 +1736,7 @@ UiDisplayMenu (
   //

   // Get user's selection

   //

-  NewPos = Menu.ForwardLink;

+  NewPos = gMenuOption.ForwardLink;

 

   gST->ConOut->EnableCursor (gST->ConOut, FALSE);

   UpdateStatusBar (REFRESH_STATUS_BAR, (UINT8) 0, TRUE);

@@ -1744,7 +1746,7 @@ UiDisplayMenu (
   while (TRUE) {

     switch (ControlFlag) {

     case CfInitialization:

-      if (IsListEmpty (&Menu)) {

+      if (IsListEmpty (&gMenuOption)) {

         ControlFlag = CfReadKey;

       } else {

         ControlFlag = CfCheckSelection;

@@ -1766,8 +1768,8 @@ UiDisplayMenu (
         //

         // Display menu

         //

-        gDownArrow      = FALSE;

-        gUpArrow        = FALSE;

+        DownArrow       = FALSE;

+        UpArrow         = FALSE;

         Row             = TopRow;

 

         Temp            = SkipValue;

@@ -1784,7 +1786,7 @@ UiDisplayMenu (
         UiFreeRefreshList ();

         MinRefreshInterval = 0;

 

-        for (Link = TopOfScreen; Link != &Menu; Link = Link->ForwardLink) {

+        for (Link = TopOfScreen; Link != &gMenuOption; Link = Link->ForwardLink) {

           MenuOption          = MENU_OPTION_FROM_LINK (Link);

           MenuOption->Row     = Row;

           MenuOption->Col     = Col;

@@ -1989,7 +1991,7 @@ UiDisplayMenu (
 

           if (Row > BottomRow) {

             if (!ValueIsScroll (FALSE, Link)) {

-              gDownArrow = TRUE;

+              DownArrow = TRUE;

             }

 

             Row = BottomRow + 1;

@@ -1998,10 +2000,10 @@ UiDisplayMenu (
         }

 

         if (!ValueIsScroll (TRUE, TopOfScreen)) {

-          gUpArrow = TRUE;

+          UpArrow = TRUE;

         }

 

-        if (gUpArrow) {

+        if (UpArrow) {

           gST->ConOut->SetAttribute (gST->ConOut, ARROW_TEXT | ARROW_BACKGROUND);

           PrintAt (

             LocalScreen.LeftColumn + gPromptBlockWidth + gOptionBlockWidth + 1,

@@ -2012,7 +2014,7 @@ UiDisplayMenu (
           gST->ConOut->SetAttribute (gST->ConOut, FIELD_TEXT | FIELD_BACKGROUND);

         }

 

-        if (gDownArrow) {

+        if (DownArrow) {

           gST->ConOut->SetAttribute (gST->ConOut, ARROW_TEXT | ARROW_BACKGROUND);

           PrintAt (

             LocalScreen.LeftColumn + gPromptBlockWidth + gOptionBlockWidth + 1,

@@ -2043,10 +2045,10 @@ UiDisplayMenu (
       Repaint     = FALSE;

 

       if (Selection->QuestionId != 0) {

-        NewPos = Menu.ForwardLink;

+        NewPos = gMenuOption.ForwardLink;

         SavedMenuOption = MENU_OPTION_FROM_LINK (NewPos);

 

-        while (SavedMenuOption->ThisTag->QuestionId != Selection->QuestionId && NewPos->ForwardLink != &Menu) {

+        while (SavedMenuOption->ThisTag->QuestionId != Selection->QuestionId && NewPos->ForwardLink != &gMenuOption) {

           NewPos     = NewPos->ForwardLink;

           SavedMenuOption = MENU_OPTION_FROM_LINK (NewPos);

         }

@@ -2439,21 +2441,21 @@ UiDisplayMenu (
         // If the screen has no menu items, and the user didn't select UiReset

         // ignore the selection and go back to reading keys.

         //

-        if (IsListEmpty (&Menu)) {

+        if (IsListEmpty (&gMenuOption)) {

           ControlFlag = CfReadKey;

           break;

         }

         //

         // if there is nothing logical to place a cursor on, just move on to wait for a key.

         //

-        for (Link = Menu.ForwardLink; Link != &Menu; Link = Link->ForwardLink) {

+        for (Link = gMenuOption.ForwardLink; Link != &gMenuOption; Link = Link->ForwardLink) {

           NextMenuOption = MENU_OPTION_FROM_LINK (Link);

           if (IsSelectable (NextMenuOption)) {

             break;

           }

         }

 

-        if (Link == &Menu) {

+        if (Link == &gMenuOption) {

           ControlFlag = CfPrepareToReadKey;

           break;

         }

@@ -2744,7 +2746,7 @@ UiDisplayMenu (
 

       SavedListEntry = TopOfScreen;

 

-      if (NewPos->BackLink != &Menu) {

+      if (NewPos->BackLink != &gMenuOption) {

         NewLine = TRUE;

         //

         // Adjust Date/Time position before we advance forward.

@@ -2754,7 +2756,7 @@ UiDisplayMenu (
         //

         // Caution that we have already rewind to the top, don't go backward in this situation.

         //

-        if (NewPos->BackLink != &Menu) {

+        if (NewPos->BackLink != &gMenuOption) {

           NewPos = NewPos->BackLink;

         }

 

@@ -2799,8 +2801,8 @@ UiDisplayMenu (
           // it means that we hit the begining MenuOption that can be focused

           // so we simply scroll to the top

           //

-          if (SavedListEntry != Menu.ForwardLink) {

-            TopOfScreen = Menu.ForwardLink;

+          if (SavedListEntry != gMenuOption.ForwardLink) {

+            TopOfScreen = gMenuOption.ForwardLink;

             Repaint     = TRUE;

           }

         }

@@ -2830,7 +2832,7 @@ UiDisplayMenu (
     case CfUiPageUp:

       ControlFlag     = CfCheckSelection;

 

-      if (NewPos->BackLink == &Menu) {

+      if (NewPos->BackLink == &gMenuOption) {

         NewLine = FALSE;

         Repaint = FALSE;

         break;

@@ -2841,7 +2843,7 @@ UiDisplayMenu (
       Link      = TopOfScreen;

       PreviousMenuOption = MENU_OPTION_FROM_LINK (Link);

       Index = BottomRow;

-      while ((Index >= TopRow) && (Link->BackLink != &Menu)) {

+      while ((Index >= TopRow) && (Link->BackLink != &gMenuOption)) {

         Index = Index - PreviousMenuOption->Skip;

         Link = Link->BackLink;

         PreviousMenuOption = MENU_OPTION_FROM_LINK (Link);

@@ -2859,7 +2861,7 @@ UiDisplayMenu (
         // This happens when there is no MenuOption can be focused from

         // Current MenuOption to the first MenuOption

         //

-        TopOfScreen = Menu.ForwardLink;

+        TopOfScreen = gMenuOption.ForwardLink;

       }

       Index += Difference;

       if (Index < TopRow) {

@@ -2884,7 +2886,7 @@ UiDisplayMenu (
     case CfUiPageDown:

       ControlFlag     = CfCheckSelection;

 

-      if (NewPos->ForwardLink == &Menu) {

+      if (NewPos->ForwardLink == &gMenuOption) {

         NewLine = FALSE;

         Repaint = FALSE;

         break;

@@ -2895,7 +2897,7 @@ UiDisplayMenu (
       Link    = TopOfScreen;

       NextMenuOption = MENU_OPTION_FROM_LINK (Link);

       Index = TopRow;

-      while ((Index <= BottomRow) && (Link->ForwardLink != &Menu)) {

+      while ((Index <= BottomRow) && (Link->ForwardLink != &gMenuOption)) {

         Index = Index + NextMenuOption->Skip;

         Link           = Link->ForwardLink;

         NextMenuOption = MENU_OPTION_FROM_LINK (Link);

@@ -2940,7 +2942,7 @@ UiDisplayMenu (
       SavedListEntry = NewPos;

       DistanceValue  = AdjustDateAndTimePosition (FALSE, &NewPos);

 

-      if (NewPos->ForwardLink != &Menu) {

+      if (NewPos->ForwardLink != &gMenuOption) {

         MenuOption      = MENU_OPTION_FROM_LINK (NewPos);

         NewLine         = TRUE;

         NewPos          = NewPos->ForwardLink;

diff --git a/MdeModulePkg/Universal/SetupBrowserDxe/Ui.h b/MdeModulePkg/Universal/SetupBrowserDxe/Ui.h
index 8816758..9d1bbae 100644
--- a/MdeModulePkg/Universal/SetupBrowserDxe/Ui.h
+++ b/MdeModulePkg/Universal/SetupBrowserDxe/Ui.h
@@ -190,6 +190,7 @@ typedef struct {
 } SCREEN_OPERATION_T0_CONTROL_FLAG;

 

 

+extern LIST_ENTRY          gMenuOption;

 extern MENU_REFRESH_ENTRY  *gMenuRefreshHead;

 extern UI_MENU_SELECTION   *gCurrentSelection;

 extern BOOLEAN             mHiiPackageListUpdated;