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diff --git a/BaseTools/Source/Python/GenFds/DepexSection.py b/BaseTools/Source/Python/GenFds/DepexSection.py
new file mode 100644
index 0000000000..1c8c82a72e
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+++ b/BaseTools/Source/Python/GenFds/DepexSection.py
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+## @file
+# process depex section generation
+#
+#  Copyright (c) 2007, Intel Corporation
+#
+#  All rights reserved. This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution.  The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+
+##
+# Import Modules
+#
+import Section
+from GenFdsGlobalVariable import GenFdsGlobalVariable
+import subprocess
+from Ffs import Ffs
+import os
+from CommonDataClass.FdfClass import DepexSectionClassObject
+from AutoGen.GenDepex import DependencyExpression
+import shutil
+from Common import EdkLogger
+from Common.BuildToolError import *
+
+## generate data section
+#
+#
+class DepexSection (DepexSectionClassObject):
+    ## The constructor
+    #
+    #   @param  self        The object pointer
+    #
+    def __init__(self):
+        DepexSectionClassObject.__init__(self)
+
+    def __FindGuidValue(self, CName):
+        for Arch in GenFdsGlobalVariable.ArchList:
+            for PkgDb in GenFdsGlobalVariable.WorkSpace.PackageList:
+                if CName in PkgDb.Ppis:
+                    return PkgDb.Ppis[CName]
+                if CName in PkgDb.Protocols:
+                    return PkgDb.Protocols[CName]
+                if CName in PkgDb.Guids:
+                    return PkgDb.Guids[CName]
+        return None
+
+    ## GenSection() method
+    #
+    #   Generate compressed section
+    #
+    #   @param  self        The object pointer
+    #   @param  OutputPath  Where to place output file
+    #   @param  ModuleName  Which module this section belongs to
+    #   @param  SecNum      Index of section
+    #   @param  KeyStringList  Filter for inputs of section generation
+    #   @param  FfsInf      FfsInfStatement object that contains this section data
+    #   @param  Dict        dictionary contains macro and its value
+    #   @retval tuple       (Generated file name list, section alignment)
+    #
+    def GenSection(self, OutputPath, ModuleName, SecNum, keyStringList, FfsFile = None, Dict = {}):
+
+        self.Expression = self.Expression.replace("\n", " ").replace("\r", " ")
+        ExpList = self.Expression.split()
+        ExpGuidDict = {}
+
+        for Exp in ExpList:
+            if Exp.upper() not in ('AND', 'OR', 'NOT', 'TRUE', 'FALSE', 'SOR', 'BEFORE', 'AFTER', 'END'):
+                GuidStr = self.__FindGuidValue(Exp)
+                if GuidStr == None:
+                    EdkLogger.error("GenFds", RESOURCE_NOT_AVAILABLE,
+                                    "Depex GUID %s could not be found in build DB! (ModuleName: %s)" % (Exp, ModuleName))
+
+                ExpGuidDict[Exp] = GuidStr
+
+        for Item in ExpGuidDict:
+            self.Expression = self.Expression.replace(Item, ExpGuidDict[Item])
+
+        self.Expression = self.Expression.strip()
+        ModuleType = (self.DepexType.startswith('PEI') and ['PEIM'] or ['DXE_DRIVER'])[0]
+        if self.DepexType.startswith('SMM'):
+            ModuleType = 'SMM_DRIVER'
+        InputFile = os.path.join (OutputPath, ModuleName + 'SEC' + SecNum + '.dpx')
+        InputFile = os.path.normpath(InputFile)
+
+        Dpx = DependencyExpression(self.Expression, ModuleType)
+        Dpx.Generate(InputFile)
+
+        OutputFile = os.path.join (OutputPath, ModuleName + 'SEC' + SecNum + '.depex')
+        if self.DepexType.startswith('SMM'):
+            OutputFile = os.path.join (OutputPath, ModuleName + 'SEC' + SecNum + '.smm')
+        OutputFile = os.path.normpath(OutputFile)
+        SecType = (self.DepexType.startswith('PEI') and ['PEI_DEPEX'] or ['DXE_DEPEX'])[0]
+        if self.DepexType.startswith('SMM'):
+            SecType = 'SMM_DEPEX'
+        
+        GenFdsGlobalVariable.GenerateSection(OutputFile, [InputFile], Section.Section.SectionType.get (SecType))
+        FileList = [OutputFile]
+        return FileList, self.Alignment