Function UefiMain

ShellPkg/Application/Shell/Shell.c:332–763

The entry point for the application. @param[in] ImageHandle The firmware allocated handle for the EFI image. @param[in] SystemTable A pointer to the EFI System Table. @retval EFI_SUCCESS The entry point is executed successfully. @retval other Some error occurs when executing this entry point. **/

**/
EFI_STATUS
EFIAPI
UefiMain (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS                      Status;
  CHAR16                          *TempString;
  UINTN                           Size;
  EFI_HANDLE                      ConInHandle;
  EFI_SIMPLE_TEXT_INPUT_PROTOCOL  *OldConIn;
  SPLIT_LIST                      *Split;
/*
  if (PcdGet8(PcdShellSupportLevel) > 3) {
    return (EFI_UNSUPPORTED);
  }
*/
  //
  // Clear the screen
  //
  
  Status = gST->ConOut->ClearScreen(gST->ConOut);
  if (EFI_ERROR(Status)) {
    return (Status);
  }
  
//  Print(L"Hello, World!\n");
  //
  // Populate the global structure from PCDs
  //
  ShellInfoObject.ImageDevPath                = NULL;
  ShellInfoObject.FileDevPath                 = NULL;
  ShellInfoObject.PageBreakEnabled            = PcdGetBool(PcdShellPageBreakDefault);
  ShellInfoObject.ViewingSettings.InsertMode  = PcdGetBool(PcdShellInsertModeDefault);
  ShellInfoObject.LogScreenCount              = PcdGet8   (PcdShellScreenLogCount  );

  //
  // verify we dont allow for spec violation
  //
//  ASSERT(ShellInfoObject.LogScreenCount >= 3);

  //
  // Initialize the LIST ENTRY objects...
  //
  InitializeListHead(&ShellInfoObject.BufferToFreeList.Link);
  InitializeListHead(&ShellInfoObject.ViewingSettings.CommandHistory.Link);
  InitializeListHead(&ShellInfoObject.SplitList.Link);

  //
  // Check PCDs for optional features that are not implemented yet.
  //
  /*
  if (   PcdGetBool(PcdShellSupportOldProtocols)
      || !FeaturePcdGet(PcdShellRequireHiiPlatform)
      || FeaturePcdGet(PcdShellSupportFrameworkHii)
   ) {
    return (EFI_UNSUPPORTED);