3 files changed, 113 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.c b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.c
new file mode 100644
index 00000000..c059e48f
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.c
@@ -0,0 +1,66 @@
+/** @file
+  Debug Agent library implementition with empty functions.
+
+  Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/DebugAgentLib.h>
+
+/**
+  Initialize debug agent.
+
+  This function is used to set up debug environment to support source level debugging.
+  If certain Debug Agent Library instance has to save some private data in the stack,
+  this function must work on the mode that doesn't return to the caller, then
+  the caller needs to wrap up all rest of logic after InitializeDebugAgent() into one
+  function and pass it into InitializeDebugAgent(). InitializeDebugAgent() is
+  responsible to invoke the passing-in function at the end of InitializeDebugAgent().
+
+  If the parameter Function is not NULL, Debug Agent Library instance will invoke it by
+  passing in the Context to be its parameter.
+
+  If Function() is NULL, Debug Agent Library instance will return after setup debug
+  environment.
+
+  @param[in] InitFlag     Init flag is used to decide the initialize process.
+  @param[in] Context      Context needed according to InitFlag; it was optional.
+  @param[in] Function     Continue function called by debug agent library; it was
+                          optional.
+
+**/
+VOID
+EFIAPI
+InitializeDebugAgent (
+  IN UINT32                InitFlag,
+  IN VOID                  *Context, OPTIONAL
+  IN DEBUG_AGENT_CONTINUE  Function  OPTIONAL
+  )
+{
+  if (Function != NULL) {
+    Function (Context);
+  }
+}
+
+/**
+  Enable/Disable the interrupt of debug timer and return the interrupt state
+  prior to the operation.
+
+  If EnableStatus is TRUE, enable the interrupt of debug timer.
+  If EnableStatus is FALSE, disable the interrupt of debug timer.
+
+  @param[in] EnableStatus    Enable/Disable.
+
+  @return FALSE always.
+
+**/
+BOOLEAN
+EFIAPI
+SaveAndSetDebugTimerInterrupt (
+  IN BOOLEAN                EnableStatus
+  )
+{
+  return FALSE;
+}
+
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.inf b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.inf
new file mode 100644
index 00000000..dbd2a97d
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.inf
@@ -0,0 +1,31 @@
+## @file
+#  Null instance of Debug Agent Library with empty functions.
+#
+#  Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = DebugAgentLibNull
+  MODULE_UNI_FILE                = DebugAgentLibNull.uni
+  FILE_GUID                      = 4904B42F-9FC0-4c2e-BB3F-A2AB35123530
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = DebugAgentLib
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+
+[Sources.common]
+  DebugAgentLibNull.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
diff --git a/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.uni b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.uni
new file mode 100644
index 00000000..eeb258b0
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.uni
@@ -0,0 +1,16 @@
+// /** @file
+// Null instance of Debug Agent Library with empty functions.
+//
+// Null instance of Debug Agent Library with empty functions.
+//
+// Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+// **/
+
+
+#string STR_MODULE_ABSTRACT             #language en-US "Null instance of Debug Agent Library with empty functions"
+
+#string STR_MODULE_DESCRIPTION          #language en-US "Null instance of Debug Agent Library with empty functions."
+