MdePkg/Library/BasePeCoffGetEntryPointLib/PeCoffGetEntryPoint.c - third_party/edk2 - Git at Google

 /** @file
   Provides the services to get the entry point to a PE/COFF image that has either been
   loaded into memory or is executing at it's linked address.

   Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
   Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   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.

 **/


 #include <Base.h>

 #include <Library/PeCoffGetEntryPointLib.h>
 #include <Library/DebugLib.h>

 #include <IndustryStandard/PeImage.h>

 #define PE_COFF_IMAGE_ALIGN_SIZE        4

 /**
   Retrieves and returns a pointer to the entry point to a PE/COFF image that has been loaded
   into system memory with the PE/COFF Loader Library functions.

   Retrieves the entry point to the PE/COFF image specified by Pe32Data and returns this entry
   point in EntryPoint.  If the entry point could not be retrieved from the PE/COFF image, then
   return RETURN_INVALID_PARAMETER.  Otherwise return RETURN_SUCCESS.
   If Pe32Data is NULL, then ASSERT().
   If EntryPoint is NULL, then ASSERT().

   @param  Pe32Data                  The pointer to the PE/COFF image that is loaded in system memory.
   @param  EntryPoint                The pointer to entry point to the PE/COFF image to return.

   @retval RETURN_SUCCESS            EntryPoint was returned.
   @retval RETURN_INVALID_PARAMETER  The entry point could not be found in the PE/COFF image.

 **/
 RETURN_STATUS
 EFIAPI
 PeCoffLoaderGetEntryPoint (
   IN  VOID  *Pe32Data,
   OUT VOID  **EntryPoint
   )
 {
   EFI_IMAGE_DOS_HEADER                  *DosHdr;
   EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION   Hdr;

   ASSERT (Pe32Data   != NULL);
   ASSERT (EntryPoint != NULL);

   DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;
   if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
     //
     // DOS image header is present, so read the PE header after the DOS image header.
     //
     Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
   } else {
     //
     // DOS image header is not present, so PE header is at the image base.
     //
     Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
   }

   //
   // Calculate the entry point relative to the start of the image.
   // AddressOfEntryPoint is common for PE32 & PE32+
   //
   if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {
     *EntryPoint = (VOID *)((UINTN)Pe32Data + (UINTN)(Hdr.Te->AddressOfEntryPoint & 0x0ffffffff) + sizeof(EFI_TE_IMAGE_HEADER) - Hdr.Te->StrippedSize);
     return RETURN_SUCCESS;
   } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
     *EntryPoint = (VOID *)((UINTN)Pe32Data + (UINTN)(Hdr.Pe32->OptionalHeader.AddressOfEntryPoint & 0x0ffffffff));
     return RETURN_SUCCESS;
   }

   return RETURN_UNSUPPORTED;
 }


 /**
   Returns the machine type of a PE/COFF image.

   Returns the machine type from the PE/COFF image specified by Pe32Data.
   If Pe32Data is NULL, then ASSERT().

   @param  Pe32Data   The pointer to the PE/COFF image that is loaded in system
                      memory.

   @return Machine type or zero if not a valid image.

 **/
 UINT16
 EFIAPI
 PeCoffLoaderGetMachineType (
   IN VOID  *Pe32Data
   )
 {
   EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION  Hdr;
   EFI_IMAGE_DOS_HEADER                 *DosHdr;

   ASSERT (Pe32Data != NULL);

   DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;
   if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
     //
     // DOS image header is present, so read the PE header after the DOS image header.
     //
     Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
   } else {
     //
     // DOS image header is not present, so PE header is at the image base.
     //
     Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
   }

   if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {
     return Hdr.Te->Machine;
   } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE)  {
     return Hdr.Pe32->FileHeader.Machine;
   }

   return 0x0000;
 }

 /**
   Returns a pointer to the PDB file name for a PE/COFF image that has been
   loaded into system memory with the PE/COFF Loader Library functions.

   Returns the PDB file name for the PE/COFF image specified by Pe32Data.  If
   the PE/COFF image specified by Pe32Data is not a valid, then NULL is
   returned.  If the PE/COFF image specified by Pe32Data does not contain a
   debug directory entry, then NULL is returned.  If the debug directory entry
   in the PE/COFF image specified by Pe32Data does not contain a PDB file name,
   then NULL is returned.
   If Pe32Data is NULL, then ASSERT().

   @param  Pe32Data   The pointer to the PE/COFF image that is loaded in system
                      memory.

   @return The PDB file name for the PE/COFF image specified by Pe32Data or NULL
           if it cannot be retrieved.

 **/
 VOID *
 EFIAPI
 PeCoffLoaderGetPdbPointer (
   IN VOID  *Pe32Data
   )
 {
   EFI_IMAGE_DOS_HEADER                  *DosHdr;
   EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION   Hdr;
   EFI_IMAGE_DATA_DIRECTORY              *DirectoryEntry;
   EFI_IMAGE_DEBUG_DIRECTORY_ENTRY       *DebugEntry;
   UINTN                                 DirCount;
   VOID                                  *CodeViewEntryPointer;
   INTN                                  TEImageAdjust;
   UINT32                                NumberOfRvaAndSizes;
   UINT16                                Magic;

   ASSERT (Pe32Data   != NULL);

   TEImageAdjust       = 0;
   DirectoryEntry      = NULL;
   DebugEntry          = NULL;
   NumberOfRvaAndSizes = 0;

   DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;
   if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
     //
     // DOS image header is present, so read the PE header after the DOS image header.
     //
     Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
   } else {
     //
     // DOS image header is not present, so PE header is at the image base.
     //
     Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
   }

   if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {
     if (Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress != 0) {
       DirectoryEntry  = &Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG];
       TEImageAdjust   = sizeof (EFI_TE_IMAGE_HEADER) - Hdr.Te->StrippedSize;
       DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *)((UINTN) Hdr.Te +
                     Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress +
                     TEImageAdjust);
     }
   } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
     //
     // NOTE: We use Machine field to identify PE32/PE32+, instead of Magic.
     //       It is due to backward-compatibility, for some system might
     //       generate PE32+ image with PE32 Magic.
     //
     switch (Hdr.Pe32->FileHeader.Machine) {
     case IMAGE_FILE_MACHINE_I386:
       //
       // Assume PE32 image with IA32 Machine field.
       //
       Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
       break;
     case IMAGE_FILE_MACHINE_X64:
     case IMAGE_FILE_MACHINE_IA64:
       //
       // Assume PE32+ image with x64 or IA64 Machine field
       //
       Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
       break;
     default:
       //
       // For unknow Machine field, use Magic in optional Header
       //
       Magic = Hdr.Pe32->OptionalHeader.Magic;
     }

     if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
       //
       // Use PE32 offset get Debug Directory Entry
       //
       NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;
       DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);
       DebugEntry     = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *) ((UINTN) Pe32Data + DirectoryEntry->VirtualAddress);
     } else if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
       //
       // Use PE32+ offset get Debug Directory Entry
       //
       NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;
       DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);
       DebugEntry     = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *) ((UINTN) Pe32Data + DirectoryEntry->VirtualAddress);
     }

     if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_DEBUG) {
       DirectoryEntry = NULL;
       DebugEntry = NULL;
     }
   } else {
     return NULL;
   }

   if (DebugEntry == NULL || DirectoryEntry == NULL) {
     return NULL;
   }

   //
   // Scan the directory to find the debug entry.
   //
   for (DirCount = 0; DirCount < DirectoryEntry->Size; DirCount += sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY), DebugEntry++) {
     if (DebugEntry->Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW) {
       if (DebugEntry->SizeOfData > 0) {
         CodeViewEntryPointer = (VOID *) ((UINTN) DebugEntry->RVA + ((UINTN)Pe32Data) + (UINTN)TEImageAdjust);
         switch (* (UINT32 *) CodeViewEntryPointer) {
         case CODEVIEW_SIGNATURE_NB10:
           return (VOID *) ((CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY));
         case CODEVIEW_SIGNATURE_RSDS:
           return (VOID *) ((CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_RSDS_ENTRY));
         case CODEVIEW_SIGNATURE_MTOC:
           return (VOID *) ((CHAR8 *)CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_MTOC_ENTRY));
         default:
           break;
         }
       }
     }
   }

   return NULL;
 }

 /**
   Returns the size of the PE/COFF headers

   Returns the size of the PE/COFF header specified by Pe32Data.
   If Pe32Data is NULL, then ASSERT().

   @param  Pe32Data   The pointer to the PE/COFF image that is loaded in system
                      memory.

   @return Size of PE/COFF header in bytes or zero if not a valid image.

 **/
 UINT32
 EFIAPI
 PeCoffGetSizeOfHeaders (
   IN VOID     *Pe32Data
   )
 {
   EFI_IMAGE_DOS_HEADER                  *DosHdr;
   EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION   Hdr;
   UINTN                                 SizeOfHeaders;

   ASSERT (Pe32Data   != NULL);

   DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;
   if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
     //
     // DOS image header is present, so read the PE header after the DOS image header.
     //
     Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
   } else {
     //
     // DOS image header is not present, so PE header is at the image base.
     //
     Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
   }

   if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {
     SizeOfHeaders = sizeof (EFI_TE_IMAGE_HEADER) + (UINTN)Hdr.Te->BaseOfCode - (UINTN)Hdr.Te->StrippedSize;
   } else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
     SizeOfHeaders = Hdr.Pe32->OptionalHeader.SizeOfHeaders;
   } else {
     SizeOfHeaders = 0;
   }

   return (UINT32) SizeOfHeaders;
 }

 /**
   Returns PE/COFF image base is loaded in system memory where the input address is in.

   On DEBUG build, searches the PE/COFF image base forward the input address and
   returns it.

   @param  Address    Address located in one PE/COFF image.

   @retval 0          RELEASE build or cannot find the PE/COFF image base.
   @retval others     PE/COFF image base found.

 **/
 UINTN
 EFIAPI
 PeCoffSearchImageBase (
   IN UINTN    Address
   )
 {
   UINTN                                Pe32Data;

   Pe32Data = 0;

   DEBUG_CODE (
     EFI_IMAGE_DOS_HEADER                 *DosHdr;
     EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION  Hdr;

     //
     // Find Image Base
     //
     Pe32Data = Address & ~(PE_COFF_IMAGE_ALIGN_SIZE - 1);
     while (Pe32Data != 0) {
       DosHdr = (EFI_IMAGE_DOS_HEADER *) Pe32Data;
       if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
         //
         // DOS image header is present, so read the PE header after the DOS image header.
         //
         Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)(Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
         //
         // Make sure PE header address does not overflow and is less than the initial address.
         //
         if (((UINTN)Hdr.Pe32 > Pe32Data) && ((UINTN)Hdr.Pe32 < Address)) {
           if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
             break;
           }
         }
       } else {
         //
         // DOS image header is not present, TE header is at the image base.
         //
         Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
         if ((Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) &&
             ((Hdr.Te->Machine == IMAGE_FILE_MACHINE_I386)  || (Hdr.Te->Machine == IMAGE_FILE_MACHINE_IA64) ||
              (Hdr.Te->Machine == IMAGE_FILE_MACHINE_EBC)   || (Hdr.Te->Machine == IMAGE_FILE_MACHINE_X64)  ||
              (Hdr.Te->Machine == IMAGE_FILE_MACHINE_ARM64) || (Hdr.Te->Machine == IMAGE_FILE_MACHINE_ARMTHUMB_MIXED))
              ) {
           break;
         }
       }

       //
       // Not found the image base, check the previous aligned address
       //
       Pe32Data -= PE_COFF_IMAGE_ALIGN_SIZE;
     }
   );

   return Pe32Data;
 }
	/** @file
	Provides the services to get the entry point to a PE/COFF image that has either been
	loaded into memory or is executing at it's linked address.

	Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
	Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
	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.

	**/


	#include <Base.h>

	#include <Library/PeCoffGetEntryPointLib.h>
	#include <Library/DebugLib.h>

	#include <IndustryStandard/PeImage.h>

	#define PE_COFF_IMAGE_ALIGN_SIZE 4

	/**
	Retrieves and returns a pointer to the entry point to a PE/COFF image that has been loaded
	into system memory with the PE/COFF Loader Library functions.

	Retrieves the entry point to the PE/COFF image specified by Pe32Data and returns this entry
	point in EntryPoint. If the entry point could not be retrieved from the PE/COFF image, then
	return RETURN_INVALID_PARAMETER. Otherwise return RETURN_SUCCESS.
	If Pe32Data is NULL, then ASSERT().
	If EntryPoint is NULL, then ASSERT().

	@param Pe32Data The pointer to the PE/COFF image that is loaded in system memory.
	@param EntryPoint The pointer to entry point to the PE/COFF image to return.

	@retval RETURN_SUCCESS EntryPoint was returned.
	@retval RETURN_INVALID_PARAMETER The entry point could not be found in the PE/COFF image.

	**/
	RETURN_STATUS
	EFIAPI
	PeCoffLoaderGetEntryPoint (
	IN VOID *Pe32Data,
	OUT VOID **EntryPoint
	)
	{
	EFI_IMAGE_DOS_HEADER *DosHdr;
	EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;

	ASSERT (Pe32Data != NULL);
	ASSERT (EntryPoint != NULL);

	DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;
	if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
	//
	// DOS image header is present, so read the PE header after the DOS image header.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
	} else {
	//
	// DOS image header is not present, so PE header is at the image base.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
	}

	//
	// Calculate the entry point relative to the start of the image.
	// AddressOfEntryPoint is common for PE32 & PE32+
	//
	if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {
	EntryPoint = (VOID )((UINTN)Pe32Data + (UINTN)(Hdr.Te->AddressOfEntryPoint & 0x0ffffffff) + sizeof(EFI_TE_IMAGE_HEADER) - Hdr.Te->StrippedSize);
	return RETURN_SUCCESS;
	} else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
	EntryPoint = (VOID )((UINTN)Pe32Data + (UINTN)(Hdr.Pe32->OptionalHeader.AddressOfEntryPoint & 0x0ffffffff));
	return RETURN_SUCCESS;
	}

	return RETURN_UNSUPPORTED;
	}


	/**
	Returns the machine type of a PE/COFF image.

	Returns the machine type from the PE/COFF image specified by Pe32Data.
	If Pe32Data is NULL, then ASSERT().

	@param Pe32Data The pointer to the PE/COFF image that is loaded in system
	memory.

	@return Machine type or zero if not a valid image.

	**/
	UINT16
	EFIAPI
	PeCoffLoaderGetMachineType (
	IN VOID *Pe32Data
	)
	{
	EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;
	EFI_IMAGE_DOS_HEADER *DosHdr;

	ASSERT (Pe32Data != NULL);

	DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;
	if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
	//
	// DOS image header is present, so read the PE header after the DOS image header.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
	} else {
	//
	// DOS image header is not present, so PE header is at the image base.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
	}

	if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {
	return Hdr.Te->Machine;
	} else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
	return Hdr.Pe32->FileHeader.Machine;
	}

	return 0x0000;
	}

	/**
	Returns a pointer to the PDB file name for a PE/COFF image that has been
	loaded into system memory with the PE/COFF Loader Library functions.

	Returns the PDB file name for the PE/COFF image specified by Pe32Data. If
	the PE/COFF image specified by Pe32Data is not a valid, then NULL is
	returned. If the PE/COFF image specified by Pe32Data does not contain a
	debug directory entry, then NULL is returned. If the debug directory entry
	in the PE/COFF image specified by Pe32Data does not contain a PDB file name,
	then NULL is returned.
	If Pe32Data is NULL, then ASSERT().

	@param Pe32Data The pointer to the PE/COFF image that is loaded in system
	memory.

	@return The PDB file name for the PE/COFF image specified by Pe32Data or NULL
	if it cannot be retrieved.

	**/
	VOID *
	EFIAPI
	PeCoffLoaderGetPdbPointer (
	IN VOID *Pe32Data
	)
	{
	EFI_IMAGE_DOS_HEADER *DosHdr;
	EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;
	EFI_IMAGE_DATA_DIRECTORY *DirectoryEntry;
	EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *DebugEntry;
	UINTN DirCount;
	VOID *CodeViewEntryPointer;
	INTN TEImageAdjust;
	UINT32 NumberOfRvaAndSizes;
	UINT16 Magic;

	ASSERT (Pe32Data != NULL);

	TEImageAdjust = 0;
	DirectoryEntry = NULL;
	DebugEntry = NULL;
	NumberOfRvaAndSizes = 0;

	DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;
	if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
	//
	// DOS image header is present, so read the PE header after the DOS image header.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
	} else {
	//
	// DOS image header is not present, so PE header is at the image base.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
	}

	if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {
	if (Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress != 0) {
	DirectoryEntry = &Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG];
	TEImageAdjust = sizeof (EFI_TE_IMAGE_HEADER) - Hdr.Te->StrippedSize;
	DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *)((UINTN) Hdr.Te +
	Hdr.Te->DataDirectory[EFI_TE_IMAGE_DIRECTORY_ENTRY_DEBUG].VirtualAddress +
	TEImageAdjust);
	}
	} else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
	//
	// NOTE: We use Machine field to identify PE32/PE32+, instead of Magic.
	// It is due to backward-compatibility, for some system might
	// generate PE32+ image with PE32 Magic.
	//
	switch (Hdr.Pe32->FileHeader.Machine) {
	case IMAGE_FILE_MACHINE_I386:
	//
	// Assume PE32 image with IA32 Machine field.
	//
	Magic = EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC;
	break;
	case IMAGE_FILE_MACHINE_X64:
	case IMAGE_FILE_MACHINE_IA64:
	//
	// Assume PE32+ image with x64 or IA64 Machine field
	//
	Magic = EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC;
	break;
	default:
	//
	// For unknow Machine field, use Magic in optional Header
	//
	Magic = Hdr.Pe32->OptionalHeader.Magic;
	}

	if (Magic == EFI_IMAGE_NT_OPTIONAL_HDR32_MAGIC) {
	//
	// Use PE32 offset get Debug Directory Entry
	//
	NumberOfRvaAndSizes = Hdr.Pe32->OptionalHeader.NumberOfRvaAndSizes;
	DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);
	DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *) ((UINTN) Pe32Data + DirectoryEntry->VirtualAddress);
	} else if (Hdr.Pe32->OptionalHeader.Magic == EFI_IMAGE_NT_OPTIONAL_HDR64_MAGIC) {
	//
	// Use PE32+ offset get Debug Directory Entry
	//
	NumberOfRvaAndSizes = Hdr.Pe32Plus->OptionalHeader.NumberOfRvaAndSizes;
	DirectoryEntry = (EFI_IMAGE_DATA_DIRECTORY *)&(Hdr.Pe32Plus->OptionalHeader.DataDirectory[EFI_IMAGE_DIRECTORY_ENTRY_DEBUG]);
	DebugEntry = (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY *) ((UINTN) Pe32Data + DirectoryEntry->VirtualAddress);
	}

	if (NumberOfRvaAndSizes <= EFI_IMAGE_DIRECTORY_ENTRY_DEBUG) {
	DirectoryEntry = NULL;
	DebugEntry = NULL;
	}
	} else {
	return NULL;
	}

	if (DebugEntry == NULL \|\| DirectoryEntry == NULL) {
	return NULL;
	}

	//
	// Scan the directory to find the debug entry.
	//
	for (DirCount = 0; DirCount < DirectoryEntry->Size; DirCount += sizeof (EFI_IMAGE_DEBUG_DIRECTORY_ENTRY), DebugEntry++) {
	if (DebugEntry->Type == EFI_IMAGE_DEBUG_TYPE_CODEVIEW) {
	if (DebugEntry->SizeOfData > 0) {
	CodeViewEntryPointer = (VOID *) ((UINTN) DebugEntry->RVA + ((UINTN)Pe32Data) + (UINTN)TEImageAdjust);
	switch (* (UINT32 *) CodeViewEntryPointer) {
	case CODEVIEW_SIGNATURE_NB10:
	return (VOID ) ((CHAR8 )CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY));
	case CODEVIEW_SIGNATURE_RSDS:
	return (VOID ) ((CHAR8 )CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_RSDS_ENTRY));
	case CODEVIEW_SIGNATURE_MTOC:
	return (VOID ) ((CHAR8 )CodeViewEntryPointer + sizeof (EFI_IMAGE_DEBUG_CODEVIEW_MTOC_ENTRY));
	default:
	break;
	}
	}
	}
	}

	return NULL;
	}

	/**
	Returns the size of the PE/COFF headers

	Returns the size of the PE/COFF header specified by Pe32Data.
	If Pe32Data is NULL, then ASSERT().

	@param Pe32Data The pointer to the PE/COFF image that is loaded in system
	memory.

	@return Size of PE/COFF header in bytes or zero if not a valid image.

	**/
	UINT32
	EFIAPI
	PeCoffGetSizeOfHeaders (
	IN VOID *Pe32Data
	)
	{
	EFI_IMAGE_DOS_HEADER *DosHdr;
	EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;
	UINTN SizeOfHeaders;

	ASSERT (Pe32Data != NULL);

	DosHdr = (EFI_IMAGE_DOS_HEADER *)Pe32Data;
	if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
	//
	// DOS image header is present, so read the PE header after the DOS image header.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)((UINTN) Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
	} else {
	//
	// DOS image header is not present, so PE header is at the image base.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
	}

	if (Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) {
	SizeOfHeaders = sizeof (EFI_TE_IMAGE_HEADER) + (UINTN)Hdr.Te->BaseOfCode - (UINTN)Hdr.Te->StrippedSize;
	} else if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
	SizeOfHeaders = Hdr.Pe32->OptionalHeader.SizeOfHeaders;
	} else {
	SizeOfHeaders = 0;
	}

	return (UINT32) SizeOfHeaders;
	}

	/**
	Returns PE/COFF image base is loaded in system memory where the input address is in.

	On DEBUG build, searches the PE/COFF image base forward the input address and
	returns it.

	@param Address Address located in one PE/COFF image.

	@retval 0 RELEASE build or cannot find the PE/COFF image base.
	@retval others PE/COFF image base found.

	**/
	UINTN
	EFIAPI
	PeCoffSearchImageBase (
	IN UINTN Address
	)
	{
	UINTN Pe32Data;

	Pe32Data = 0;

	DEBUG_CODE (
	EFI_IMAGE_DOS_HEADER *DosHdr;
	EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION Hdr;

	//
	// Find Image Base
	//
	Pe32Data = Address & ~(PE_COFF_IMAGE_ALIGN_SIZE - 1);
	while (Pe32Data != 0) {
	DosHdr = (EFI_IMAGE_DOS_HEADER *) Pe32Data;
	if (DosHdr->e_magic == EFI_IMAGE_DOS_SIGNATURE) {
	//
	// DOS image header is present, so read the PE header after the DOS image header.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)(Pe32Data + (UINTN) ((DosHdr->e_lfanew) & 0x0ffff));
	//
	// Make sure PE header address does not overflow and is less than the initial address.
	//
	if (((UINTN)Hdr.Pe32 > Pe32Data) && ((UINTN)Hdr.Pe32 < Address)) {
	if (Hdr.Pe32->Signature == EFI_IMAGE_NT_SIGNATURE) {
	break;
	}
	}
	} else {
	//
	// DOS image header is not present, TE header is at the image base.
	//
	Hdr.Pe32 = (EFI_IMAGE_NT_HEADERS32 *)Pe32Data;
	if ((Hdr.Te->Signature == EFI_TE_IMAGE_HEADER_SIGNATURE) &&
	((Hdr.Te->Machine == IMAGE_FILE_MACHINE_I386) \|\| (Hdr.Te->Machine == IMAGE_FILE_MACHINE_IA64) \|\|
	(Hdr.Te->Machine == IMAGE_FILE_MACHINE_EBC) \|\| (Hdr.Te->Machine == IMAGE_FILE_MACHINE_X64) \|\|
	(Hdr.Te->Machine == IMAGE_FILE_MACHINE_ARM64) \|\| (Hdr.Te->Machine == IMAGE_FILE_MACHINE_ARMTHUMB_MIXED))
	) {
	break;
	}
	}

	//
	// Not found the image base, check the previous aligned address
	//
	Pe32Data -= PE_COFF_IMAGE_ALIGN_SIZE;
	}
	);

	return Pe32Data;
	}