[mirror_edk2.git] / MdeModulePkg / Core / Dxe / Image / ImageFile.c

/** @file\r
  Handle services to image file.\r
\r
Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
All rights reserved. This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include "DxeMain.h"\r
\r
/**\r
  Search a handle to a device on a specified device path that supports a specified protocol,\r
  interface of that protocol on that handle is another output.\r
\r
\r
\r
  @param  Protocol               The protocol to search for\r
  @param  FilePath               The specified device path\r
  @param  Interface              Interface of the protocol on the handle\r
  @param  Handle                 The handle to the device on the specified device\r
                                 path that supports the protocol.\r
\r
  @return Status code.\r
\r
**/\r
EFI_STATUS\r
CoreDevicePathToInterface (\r
  IN EFI_GUID                     *Protocol,\r
  IN EFI_DEVICE_PATH_PROTOCOL     **FilePath,\r
  OUT VOID                        **Interface,\r
  OUT EFI_HANDLE                  *Handle\r
  )\r
{\r
  EFI_STATUS                      Status;\r
\r
  Status = CoreLocateDevicePath (Protocol, FilePath, Handle);\r
  if (!EFI_ERROR (Status)) {\r
    Status = CoreHandleProtocol (*Handle, Protocol, Interface);\r
  }\r
  return Status;\r
}\r
\r
\r
/**\r
  Opens a file for (simple) reading.  The simple read abstraction\r
  will access the file either from a memory copy, from a file\r
  system interface, or from the load file interface.\r
\r
  @param  BootPolicy             Policy for Open Image File.\r
  @param  SourceBuffer           Pointer to the memory location containing copy\r
                                 of the image to be loaded.\r
  @param  SourceSize             The size in bytes of SourceBuffer.\r
  @param  FilePath               The specific file path from which the image is\r
                                 loaded\r
  @param  DeviceHandle           Pointer to the return device handle.\r
  @param  ImageFileHandle        Pointer to the image file handle.\r
  @param  AuthenticationStatus   Pointer to a caller-allocated UINT32 in which\r
                                 the authentication status is returned.\r
\r
  @retval EFI_SUCCESS            Image file successfully opened.\r
  @retval EFI_LOAD_ERROR         If the caller passed a copy of the file, and\r
                                 SourceSize is 0.\r
  @retval EFI_INVALID_PARAMETER  File path is not valid.\r
  @retval EFI_NOT_FOUND          File not found.\r
\r
**/\r
EFI_STATUS\r
CoreOpenImageFile (\r
  IN BOOLEAN                        BootPolicy,\r
  IN VOID                           *SourceBuffer   OPTIONAL,\r
  IN UINTN                          SourceSize,\r
  IN OUT EFI_DEVICE_PATH_PROTOCOL   **FilePath,\r
  OUT EFI_HANDLE                    *DeviceHandle,\r
  IN IMAGE_FILE_HANDLE              *ImageFileHandle,\r
  OUT UINT32                        *AuthenticationStatus\r
  )\r
{\r
  EFI_STATUS                        Status;\r
  EFI_DEVICE_PATH_PROTOCOL          *TempFilePath;\r
  FILEPATH_DEVICE_PATH              *FilePathNode;\r
  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FwVolFilePathNode;\r
  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *Volume;\r
  EFI_FILE_HANDLE                   FileHandle;\r
  EFI_FILE_HANDLE                   LastHandle;\r
  EFI_LOAD_FILE_PROTOCOL            *LoadFile;\r
  EFI_FIRMWARE_VOLUME2_PROTOCOL     *FwVol;\r
  EFI_SECTION_TYPE                  SectionType;\r
  UINT8                             *Pe32Buffer;\r
  UINTN                             Pe32BufferSize;\r
  EFI_FV_FILETYPE                   Type;\r
  EFI_FV_FILE_ATTRIBUTES            Attrib;\r
  EFI_FILE_INFO                     *FileInfo;\r
  UINTN                             FileInfoSize;\r
  EFI_GUID                          *NameGuid;\r
  FILEPATH_DEVICE_PATH              *OriginalFilePathNode;\r
\r
  OriginalFilePathNode = NULL;\r
  *AuthenticationStatus = 0;\r
  ZeroMem (ImageFileHandle, sizeof (IMAGE_FILE_HANDLE));\r
  ImageFileHandle->Signature = IMAGE_FILE_HANDLE_SIGNATURE;\r
\r
  //\r
  // If the caller passed a copy of the file, then just use it\r
  //\r
  if (SourceBuffer != NULL) {\r
    ImageFileHandle->Source     = SourceBuffer;\r
    ImageFileHandle->SourceSize = SourceSize;\r
    *DeviceHandle               = NULL;\r
    CoreLocateDevicePath (&gEfiDevicePathProtocolGuid, FilePath, DeviceHandle);\r
    if (SourceSize > 0) {\r
      Status = EFI_SUCCESS;\r
    } else {\r
      Status = EFI_LOAD_ERROR;\r
    }\r
    goto Done;\r
  }\r
\r
  //\r
  // Make sure FilePath is valid\r
  //\r
  if (*FilePath == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  //\r
  // Check to see if it's in a Firmware Volume\r
  //\r
  FwVolFilePathNode = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) *FilePath;\r
  Status = CoreDevicePathToInterface (\r
            &gEfiFirmwareVolume2ProtocolGuid,\r
            (EFI_DEVICE_PATH_PROTOCOL **)&FwVolFilePathNode,\r
            (VOID*)&FwVol,\r
            DeviceHandle\r
            );\r
  if (!EFI_ERROR (Status)) {\r
    //\r
    // For FwVol File system there is only a single file name that is a GUID.\r
    //\r
    NameGuid = EfiGetNameGuidFromFwVolDevicePathNode (FwVolFilePathNode);\r
    if (NameGuid != NULL) {\r
\r
      SectionType = EFI_SECTION_PE32;\r
      Pe32Buffer  = NULL;\r
      Status = FwVol->ReadSection (\r
                        FwVol,\r
                        NameGuid,\r
                        SectionType,\r
                        0,\r
                        (VOID **)&Pe32Buffer,\r
                        &Pe32BufferSize,\r
                        AuthenticationStatus\r
                        );\r
      if (EFI_ERROR (Status)) {\r
        //\r
        // Try a raw file, since a PE32 SECTION does not exist\r
        //\r
        if (Pe32Buffer != NULL) {\r
          CoreFreePool (Pe32Buffer);\r
          *AuthenticationStatus = 0;\r
        }\r
        Pe32Buffer = NULL;\r
        Status = FwVol->ReadFile (\r
                          FwVol,\r
                          NameGuid,\r
                          (VOID **)&Pe32Buffer,\r
                          &Pe32BufferSize,\r
                          &Type,\r
                          &Attrib,\r
                          AuthenticationStatus\r
                          );\r
      }\r
\r
      if (!EFI_ERROR (Status)) {\r
        //\r
        // One of the reads passed so we are done\r
        //\r
        ImageFileHandle->Source = Pe32Buffer;\r
        ImageFileHandle->SourceSize = Pe32BufferSize;\r
        ImageFileHandle->FreeBuffer = TRUE;\r
        goto Done;\r
      }\r
    }\r
  }\r
\r
  //\r
  // Attempt to access the file via a file system interface\r
  //\r
  FilePathNode = (FILEPATH_DEVICE_PATH *) *FilePath;\r
  Status = CoreDevicePathToInterface (\r
            &gEfiSimpleFileSystemProtocolGuid,\r
            (EFI_DEVICE_PATH_PROTOCOL **)&FilePathNode,\r
            (VOID*)&Volume,\r
            DeviceHandle\r
            );\r
  if (!EFI_ERROR (Status)) {\r
    //\r
    // Open the Volume to get the File System handle\r
    //\r
    Status = Volume->OpenVolume (Volume, &FileHandle);\r
    if (!EFI_ERROR (Status)) {\r
      //\r
      // Duplicate the device path to avoid the access to unaligned device path node.\r
      // Because the device path consists of one or more FILE PATH MEDIA DEVICE PATH\r
      // nodes, It assures the fields in device path nodes are 2 byte aligned.\r
      //\r
      FilePathNode = (FILEPATH_DEVICE_PATH *)DuplicateDevicePath((EFI_DEVICE_PATH_PROTOCOL *)(UINTN)FilePathNode);\r
      if (FilePathNode == NULL) {\r
        FileHandle->Close (FileHandle);\r
        Status = EFI_OUT_OF_RESOURCES;\r
      } else {\r
        OriginalFilePathNode = FilePathNode;\r
        //\r
        // Parse each MEDIA_FILEPATH_DP node. There may be more than one, since the\r
        // directory information and filename can be seperate. The goal is to inch\r
        // our way down each device path node and close the previous node\r
        //\r
        while (!IsDevicePathEnd (&FilePathNode->Header)) {\r
          if (DevicePathType (&FilePathNode->Header) != MEDIA_DEVICE_PATH ||\r
              DevicePathSubType (&FilePathNode->Header) != MEDIA_FILEPATH_DP) {\r
            Status = EFI_UNSUPPORTED;\r
          }\r
\r
          if (EFI_ERROR (Status)) {\r
            //\r
            // Exit loop on Error\r
            //\r
            break;\r
          }\r
\r
          LastHandle = FileHandle;\r
          FileHandle = NULL;\r
\r
          Status = LastHandle->Open (\r
                                LastHandle,\r
                                &FileHandle,\r
                                FilePathNode->PathName,\r
                                EFI_FILE_MODE_READ,\r
                                0\r
                                );\r
\r
          //\r
          // Close the previous node\r
          //\r
          LastHandle->Close (LastHandle);\r
\r
          FilePathNode = (FILEPATH_DEVICE_PATH *) NextDevicePathNode (&FilePathNode->Header);\r
        }\r
        //\r
        // Free the allocated memory pool\r
        //\r
        CoreFreePool(OriginalFilePathNode);\r
      }\r
\r
      if (!EFI_ERROR (Status)) {\r
        //\r
        // We have found the file. Now we need to read it. Before we can read the file we need to\r
        // figure out how big the file is.\r
        //\r
        FileInfo = NULL;\r
        FileInfoSize = 0;\r
        Status = FileHandle->GetInfo (\r
                              FileHandle,\r
                              &gEfiFileInfoGuid,\r
                              &FileInfoSize,\r
                              FileInfo\r
                              );\r
        if (Status == EFI_BUFFER_TOO_SMALL) {\r
          FileInfo = AllocatePool (FileInfoSize);\r
          if (FileInfo != NULL) {\r
            Status = FileHandle->GetInfo (\r
                                  FileHandle,\r
                                  &gEfiFileInfoGuid,\r
                                  &FileInfoSize,\r
                                  FileInfo\r
                                  );\r
          } else {\r
            Status = EFI_OUT_OF_RESOURCES;\r
            goto Done;\r
          }\r
        }\r
        \r
        if (!EFI_ERROR (Status)) {\r
          //\r
          // Allocate space for the file\r
          //\r
          ImageFileHandle->Source = AllocatePool ((UINTN)FileInfo->FileSize);\r
          if (ImageFileHandle->Source != NULL) {\r
            //\r
            // Read the file into the buffer we allocated\r
            //\r
            ImageFileHandle->SourceSize = (UINTN) FileInfo->FileSize;\r
            ImageFileHandle->FreeBuffer = TRUE;\r
            Status = FileHandle->Read (FileHandle, &ImageFileHandle->SourceSize, ImageFileHandle->Source);\r
\r
            //\r
            // Close the file since we are done\r
            //\r
            FileHandle->Close (FileHandle);\r
            CoreFreePool (FileInfo);\r
          } else {\r
            Status = EFI_OUT_OF_RESOURCES;\r
          }\r
\r
          goto Done;\r
        }\r
      }\r
    }\r
  }\r
\r
\r
  //\r
  // Try LoadFile style\r
  //\r
\r
  TempFilePath = *FilePath;\r
  Status = CoreDevicePathToInterface (\r
             &gEfiLoadFileProtocolGuid,\r
             &TempFilePath,\r
             (VOID*) &LoadFile,\r
             DeviceHandle\r
             );\r
  if (!EFI_ERROR (Status)) {\r
    //\r
    // Call LoadFile with the correct buffer size\r
    //\r
    ASSERT (ImageFileHandle->SourceSize == 0);\r
    ASSERT (ImageFileHandle->Source == NULL);\r
    Status = LoadFile->LoadFile (\r
                         LoadFile,\r
                         TempFilePath,\r
                         BootPolicy,\r
                         &ImageFileHandle->SourceSize,\r
                         ImageFileHandle->Source\r
                         );\r
    if (Status == EFI_BUFFER_TOO_SMALL) {\r
      ImageFileHandle->Source = AllocatePool (ImageFileHandle->SourceSize);\r
      if (ImageFileHandle->Source == NULL) {\r
        Status = EFI_OUT_OF_RESOURCES;\r
      } else {\r
        Status = LoadFile->LoadFile (\r
                             LoadFile,\r
                             TempFilePath,\r
                             BootPolicy,\r
                             &ImageFileHandle->SourceSize,\r
                             ImageFileHandle->Source\r
                             );\r
      }\r
    }\r
\r
    if (!EFI_ERROR (Status) || Status == EFI_ALREADY_STARTED) {\r
      ImageFileHandle->FreeBuffer = TRUE;\r
      goto Done;\r
    }\r
  }\r
\r
  //\r
  // Nothing else to try\r
  //\r
  DEBUG ((DEBUG_LOAD|DEBUG_WARN, "CoreOpenImageFile: Device did not support a known load protocol\n"));\r
  Status = EFI_NOT_FOUND;\r
\r
Done:\r
  //\r
  // If the file was not accessed, clean up\r
  //\r
  if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {\r
    if (ImageFileHandle->FreeBuffer) {\r
      //\r
      // Free the source buffer if we allocated it\r
      //\r
      CoreFreePool (ImageFileHandle->Source);\r
    }\r
  }\r
\r
  return Status;\r
}\r
\r
\r
\r
/**\r
  Read image file (specified by UserHandle) into user specified buffer with specified offset\r
  and length.\r
\r
  @param  UserHandle             Image file handle\r
  @param  Offset                 Offset to the source file\r
  @param  ReadSize               For input, pointer of size to read; For output,\r
                                 pointer of size actually read.\r
  @param  Buffer                 Buffer to write into\r
\r
  @retval EFI_SUCCESS            Successfully read the specified part of file\r
                                 into buffer.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
CoreReadImageFile (\r
  IN     VOID    *UserHandle,\r
  IN     UINTN   Offset,\r
  IN OUT UINTN   *ReadSize,\r
  OUT    VOID    *Buffer\r
  )\r
{\r
  UINTN               EndPosition;\r
  IMAGE_FILE_HANDLE  *FHand;\r
\r
  FHand = (IMAGE_FILE_HANDLE  *)UserHandle;\r
  ASSERT (FHand->Signature == IMAGE_FILE_HANDLE_SIGNATURE);\r
\r
  //\r
  // Move data from our local copy of the file\r
  //\r
  EndPosition = Offset + *ReadSize;\r
  if (EndPosition > FHand->SourceSize) {\r
    *ReadSize = (UINT32)(FHand->SourceSize - Offset);\r
  }\r
  if (Offset >= FHand->SourceSize) {\r
      *ReadSize = 0;\r
  }\r
\r
  CopyMem (Buffer, (CHAR8 *)FHand->Source + Offset, *ReadSize);\r
  return EFI_SUCCESS;\r
}\r
\r
Commit	Line	Data
	1	/** @file\r
	2	Handle services to image file.\r
	3	\r
	4	Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
	5	All rights reserved. This program and the accompanying materials\r
	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
	13	**/\r
	14	\r
	15	#include "DxeMain.h"\r
	16	\r
	17	/**\r
	18	Search a handle to a device on a specified device path that supports a specified protocol,\r
	19	interface of that protocol on that handle is another output.\r
	20	\r
	21	\r
	22	\r
	23	@param Protocol The protocol to search for\r
	24	@param FilePath The specified device path\r
	25	@param Interface Interface of the protocol on the handle\r
	26	@param Handle The handle to the device on the specified device\r
	27	path that supports the protocol.\r
	28	\r
	29	@return Status code.\r
	30	\r
	31	**/\r
	32	EFI_STATUS\r
	33	CoreDevicePathToInterface (\r
	34	IN EFI_GUID *Protocol,\r
	35	IN EFI_DEVICE_PATH_PROTOCOL **FilePath,\r
	36	OUT VOID **Interface,\r
	37	OUT EFI_HANDLE *Handle\r
	38	)\r
	39	{\r
	40	EFI_STATUS Status;\r
	41	\r
	42	Status = CoreLocateDevicePath (Protocol, FilePath, Handle);\r
	43	if (!EFI_ERROR (Status)) {\r
	44	Status = CoreHandleProtocol (*Handle, Protocol, Interface);\r
	45	}\r
	46	return Status;\r
	47	}\r
	48	\r
	49	\r
	50	/**\r
	51	Opens a file for (simple) reading. The simple read abstraction\r
	52	will access the file either from a memory copy, from a file\r
	53	system interface, or from the load file interface.\r
	54	\r
	55	@param BootPolicy Policy for Open Image File.\r
	56	@param SourceBuffer Pointer to the memory location containing copy\r
	57	of the image to be loaded.\r
	58	@param SourceSize The size in bytes of SourceBuffer.\r
	59	@param FilePath The specific file path from which the image is\r
	60	loaded\r
	61	@param DeviceHandle Pointer to the return device handle.\r
	62	@param ImageFileHandle Pointer to the image file handle.\r
	63	@param AuthenticationStatus Pointer to a caller-allocated UINT32 in which\r
	64	the authentication status is returned.\r
	65	\r
	66	@retval EFI_SUCCESS Image file successfully opened.\r
	67	@retval EFI_LOAD_ERROR If the caller passed a copy of the file, and\r
	68	SourceSize is 0.\r
	69	@retval EFI_INVALID_PARAMETER File path is not valid.\r
	70	@retval EFI_NOT_FOUND File not found.\r
	71	\r
	72	**/\r
	73	EFI_STATUS\r
	74	CoreOpenImageFile (\r
	75	IN BOOLEAN BootPolicy,\r
	76	IN VOID *SourceBuffer OPTIONAL,\r
	77	IN UINTN SourceSize,\r
	78	IN OUT EFI_DEVICE_PATH_PROTOCOL **FilePath,\r
	79	OUT EFI_HANDLE *DeviceHandle,\r
	80	IN IMAGE_FILE_HANDLE *ImageFileHandle,\r
	81	OUT UINT32 *AuthenticationStatus\r
	82	)\r
	83	{\r
	84	EFI_STATUS Status;\r
	85	EFI_DEVICE_PATH_PROTOCOL *TempFilePath;\r
	86	FILEPATH_DEVICE_PATH *FilePathNode;\r
	87	MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FwVolFilePathNode;\r
	88	EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;\r
	89	EFI_FILE_HANDLE FileHandle;\r
	90	EFI_FILE_HANDLE LastHandle;\r
	91	EFI_LOAD_FILE_PROTOCOL *LoadFile;\r
	92	EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;\r
	93	EFI_SECTION_TYPE SectionType;\r
	94	UINT8 *Pe32Buffer;\r
	95	UINTN Pe32BufferSize;\r
	96	EFI_FV_FILETYPE Type;\r
	97	EFI_FV_FILE_ATTRIBUTES Attrib;\r
	98	EFI_FILE_INFO *FileInfo;\r
	99	UINTN FileInfoSize;\r
	100	EFI_GUID *NameGuid;\r
	101	FILEPATH_DEVICE_PATH *OriginalFilePathNode;\r
	102	\r
	103	OriginalFilePathNode = NULL;\r
	104	*AuthenticationStatus = 0;\r
	105	ZeroMem (ImageFileHandle, sizeof (IMAGE_FILE_HANDLE));\r
	106	ImageFileHandle->Signature = IMAGE_FILE_HANDLE_SIGNATURE;\r
	107	\r
	108	//\r
	109	// If the caller passed a copy of the file, then just use it\r
	110	//\r
	111	if (SourceBuffer != NULL) {\r
	112	ImageFileHandle->Source = SourceBuffer;\r
	113	ImageFileHandle->SourceSize = SourceSize;\r
	114	*DeviceHandle = NULL;\r
	115	CoreLocateDevicePath (&gEfiDevicePathProtocolGuid, FilePath, DeviceHandle);\r
	116	if (SourceSize > 0) {\r
	117	Status = EFI_SUCCESS;\r
	118	} else {\r
	119	Status = EFI_LOAD_ERROR;\r
	120	}\r
	121	goto Done;\r
	122	}\r
	123	\r
	124	//\r
	125	// Make sure FilePath is valid\r
	126	//\r
	127	if (*FilePath == NULL) {\r
	128	return EFI_INVALID_PARAMETER;\r
	129	}\r
	130	\r
	131	//\r
	132	// Check to see if it's in a Firmware Volume\r
	133	//\r
	134	FwVolFilePathNode = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH ) FilePath;\r
	135	Status = CoreDevicePathToInterface (\r
	136	&gEfiFirmwareVolume2ProtocolGuid,\r
	137	(EFI_DEVICE_PATH_PROTOCOL **)&FwVolFilePathNode,\r
	138	(VOID*)&FwVol,\r
	139	DeviceHandle\r
	140	);\r
	141	if (!EFI_ERROR (Status)) {\r
	142	//\r
	143	// For FwVol File system there is only a single file name that is a GUID.\r
	144	//\r
	145	NameGuid = EfiGetNameGuidFromFwVolDevicePathNode (FwVolFilePathNode);\r
	146	if (NameGuid != NULL) {\r
	147	\r
	148	SectionType = EFI_SECTION_PE32;\r
	149	Pe32Buffer = NULL;\r
	150	Status = FwVol->ReadSection (\r
	151	FwVol,\r
	152	NameGuid,\r
	153	SectionType,\r
	154	0,\r
	155	(VOID **)&Pe32Buffer,\r
	156	&Pe32BufferSize,\r
	157	AuthenticationStatus\r
	158	);\r
	159	if (EFI_ERROR (Status)) {\r
	160	//\r
	161	// Try a raw file, since a PE32 SECTION does not exist\r
	162	//\r
	163	if (Pe32Buffer != NULL) {\r
	164	CoreFreePool (Pe32Buffer);\r
	165	*AuthenticationStatus = 0;\r
	166	}\r
	167	Pe32Buffer = NULL;\r
	168	Status = FwVol->ReadFile (\r
	169	FwVol,\r
	170	NameGuid,\r
	171	(VOID **)&Pe32Buffer,\r
	172	&Pe32BufferSize,\r
	173	&Type,\r
	174	&Attrib,\r
	175	AuthenticationStatus\r
	176	);\r
	177	}\r
	178	\r
	179	if (!EFI_ERROR (Status)) {\r
	180	//\r
	181	// One of the reads passed so we are done\r
	182	//\r
	183	ImageFileHandle->Source = Pe32Buffer;\r
	184	ImageFileHandle->SourceSize = Pe32BufferSize;\r
	185	ImageFileHandle->FreeBuffer = TRUE;\r
	186	goto Done;\r
	187	}\r
	188	}\r
	189	}\r
	190	\r
	191	//\r
	192	// Attempt to access the file via a file system interface\r
	193	//\r
	194	FilePathNode = (FILEPATH_DEVICE_PATH ) FilePath;\r
	195	Status = CoreDevicePathToInterface (\r
	196	&gEfiSimpleFileSystemProtocolGuid,\r
	197	(EFI_DEVICE_PATH_PROTOCOL **)&FilePathNode,\r
	198	(VOID*)&Volume,\r
	199	DeviceHandle\r
	200	);\r
	201	if (!EFI_ERROR (Status)) {\r
	202	//\r
	203	// Open the Volume to get the File System handle\r
	204	//\r
	205	Status = Volume->OpenVolume (Volume, &FileHandle);\r
	206	if (!EFI_ERROR (Status)) {\r
	207	//\r
	208	// Duplicate the device path to avoid the access to unaligned device path node.\r
	209	// Because the device path consists of one or more FILE PATH MEDIA DEVICE PATH\r
	210	// nodes, It assures the fields in device path nodes are 2 byte aligned.\r
	211	//\r
	212	FilePathNode = (FILEPATH_DEVICE_PATH )DuplicateDevicePath((EFI_DEVICE_PATH_PROTOCOL )(UINTN)FilePathNode);\r
	213	if (FilePathNode == NULL) {\r
	214	FileHandle->Close (FileHandle);\r
	215	Status = EFI_OUT_OF_RESOURCES;\r
	216	} else {\r
	217	OriginalFilePathNode = FilePathNode;\r
	218	//\r
	219	// Parse each MEDIA_FILEPATH_DP node. There may be more than one, since the\r
	220	// directory information and filename can be seperate. The goal is to inch\r
	221	// our way down each device path node and close the previous node\r
	222	//\r
	223	while (!IsDevicePathEnd (&FilePathNode->Header)) {\r
	224	if (DevicePathType (&FilePathNode->Header) != MEDIA_DEVICE_PATH \|\|\r
	225	DevicePathSubType (&FilePathNode->Header) != MEDIA_FILEPATH_DP) {\r
	226	Status = EFI_UNSUPPORTED;\r
	227	}\r
	228	\r
	229	if (EFI_ERROR (Status)) {\r
	230	//\r
	231	// Exit loop on Error\r
	232	//\r
	233	break;\r
	234	}\r
	235	\r
	236	LastHandle = FileHandle;\r
	237	FileHandle = NULL;\r
	238	\r
	239	Status = LastHandle->Open (\r
	240	LastHandle,\r
	241	&FileHandle,\r
	242	FilePathNode->PathName,\r
	243	EFI_FILE_MODE_READ,\r
	244	0\r
	245	);\r
	246	\r
	247	//\r
	248	// Close the previous node\r
	249	//\r
	250	LastHandle->Close (LastHandle);\r
	251	\r
	252	FilePathNode = (FILEPATH_DEVICE_PATH *) NextDevicePathNode (&FilePathNode->Header);\r
	253	}\r
	254	//\r
	255	// Free the allocated memory pool\r
	256	//\r
	257	CoreFreePool(OriginalFilePathNode);\r
	258	}\r
	259	\r
	260	if (!EFI_ERROR (Status)) {\r
	261	//\r
	262	// We have found the file. Now we need to read it. Before we can read the file we need to\r
	263	// figure out how big the file is.\r
	264	//\r
	265	FileInfo = NULL;\r
	266	FileInfoSize = 0;\r
	267	Status = FileHandle->GetInfo (\r
	268	FileHandle,\r
	269	&gEfiFileInfoGuid,\r
	270	&FileInfoSize,\r
	271	FileInfo\r
	272	);\r
	273	if (Status == EFI_BUFFER_TOO_SMALL) {\r
	274	FileInfo = AllocatePool (FileInfoSize);\r
	275	if (FileInfo != NULL) {\r
	276	Status = FileHandle->GetInfo (\r
	277	FileHandle,\r
	278	&gEfiFileInfoGuid,\r
	279	&FileInfoSize,\r
	280	FileInfo\r
	281	);\r
	282	} else {\r
	283	Status = EFI_OUT_OF_RESOURCES;\r
	284	goto Done;\r
	285	}\r
	286	}\r
	287	\r
	288	if (!EFI_ERROR (Status)) {\r
	289	//\r
	290	// Allocate space for the file\r
	291	//\r
	292	ImageFileHandle->Source = AllocatePool ((UINTN)FileInfo->FileSize);\r
	293	if (ImageFileHandle->Source != NULL) {\r
	294	//\r
	295	// Read the file into the buffer we allocated\r
	296	//\r
	297	ImageFileHandle->SourceSize = (UINTN) FileInfo->FileSize;\r
	298	ImageFileHandle->FreeBuffer = TRUE;\r
	299	Status = FileHandle->Read (FileHandle, &ImageFileHandle->SourceSize, ImageFileHandle->Source);\r
	300	\r
	301	//\r
	302	// Close the file since we are done\r
	303	//\r
	304	FileHandle->Close (FileHandle);\r
	305	CoreFreePool (FileInfo);\r
	306	} else {\r
	307	Status = EFI_OUT_OF_RESOURCES;\r
	308	}\r
	309	\r
	310	goto Done;\r
	311	}\r
	312	}\r
	313	}\r
	314	}\r
	315	\r
	316	\r
	317	//\r
	318	// Try LoadFile style\r
	319	//\r
	320	\r
	321	TempFilePath = *FilePath;\r
	322	Status = CoreDevicePathToInterface (\r
	323	&gEfiLoadFileProtocolGuid,\r
	324	&TempFilePath,\r
	325	(VOID*) &LoadFile,\r
	326	DeviceHandle\r
	327	);\r
	328	if (!EFI_ERROR (Status)) {\r
	329	//\r
	330	// Call LoadFile with the correct buffer size\r
	331	//\r
	332	ASSERT (ImageFileHandle->SourceSize == 0);\r
	333	ASSERT (ImageFileHandle->Source == NULL);\r
	334	Status = LoadFile->LoadFile (\r
	335	LoadFile,\r
	336	TempFilePath,\r
	337	BootPolicy,\r
	338	&ImageFileHandle->SourceSize,\r
	339	ImageFileHandle->Source\r
	340	);\r
	341	if (Status == EFI_BUFFER_TOO_SMALL) {\r
	342	ImageFileHandle->Source = AllocatePool (ImageFileHandle->SourceSize);\r
	343	if (ImageFileHandle->Source == NULL) {\r
	344	Status = EFI_OUT_OF_RESOURCES;\r
	345	} else {\r
	346	Status = LoadFile->LoadFile (\r
	347	LoadFile,\r
	348	TempFilePath,\r
	349	BootPolicy,\r
	350	&ImageFileHandle->SourceSize,\r
	351	ImageFileHandle->Source\r
	352	);\r
	353	}\r
	354	}\r
	355	\r
	356	if (!EFI_ERROR (Status) \|\| Status == EFI_ALREADY_STARTED) {\r
	357	ImageFileHandle->FreeBuffer = TRUE;\r
	358	goto Done;\r
	359	}\r
	360	}\r
	361	\r
	362	//\r
	363	// Nothing else to try\r
	364	//\r
	365	DEBUG ((DEBUG_LOAD\|DEBUG_WARN, "CoreOpenImageFile: Device did not support a known load protocol\n"));\r
	366	Status = EFI_NOT_FOUND;\r
	367	\r
	368	Done:\r
	369	//\r
	370	// If the file was not accessed, clean up\r
	371	//\r
	372	if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {\r
	373	if (ImageFileHandle->FreeBuffer) {\r
	374	//\r
	375	// Free the source buffer if we allocated it\r
	376	//\r
	377	CoreFreePool (ImageFileHandle->Source);\r
	378	}\r
	379	}\r
	380	\r
	381	return Status;\r
	382	}\r
	383	\r
	384	\r
	385	\r
	386	/**\r
	387	Read image file (specified by UserHandle) into user specified buffer with specified offset\r
	388	and length.\r
	389	\r
	390	@param UserHandle Image file handle\r
	391	@param Offset Offset to the source file\r
	392	@param ReadSize For input, pointer of size to read; For output,\r
	393	pointer of size actually read.\r
	394	@param Buffer Buffer to write into\r
	395	\r
	396	@retval EFI_SUCCESS Successfully read the specified part of file\r
	397	into buffer.\r
	398	\r
	399	**/\r
	400	EFI_STATUS\r
	401	EFIAPI\r
	402	CoreReadImageFile (\r
	403	IN VOID *UserHandle,\r
	404	IN UINTN Offset,\r
	405	IN OUT UINTN *ReadSize,\r
	406	OUT VOID *Buffer\r
	407	)\r
	408	{\r
	409	UINTN EndPosition;\r
	410	IMAGE_FILE_HANDLE *FHand;\r
	411	\r
	412	FHand = (IMAGE_FILE_HANDLE *)UserHandle;\r
	413	ASSERT (FHand->Signature == IMAGE_FILE_HANDLE_SIGNATURE);\r
	414	\r
	415	//\r
	416	// Move data from our local copy of the file\r
	417	//\r
	418	EndPosition = Offset + *ReadSize;\r
	419	if (EndPosition > FHand->SourceSize) {\r
	420	*ReadSize = (UINT32)(FHand->SourceSize - Offset);\r
	421	}\r
	422	if (Offset >= FHand->SourceSize) {\r
	423	*ReadSize = 0;\r
	424	}\r
	425	\r
	426	CopyMem (Buffer, (CHAR8 )FHand->Source + Offset, ReadSize);\r
	427	return EFI_SUCCESS;\r
	428	}\r
	429	\r