[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
#include "Image.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)) {\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)) {\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
504214c4	1	/** @file\r
23c98c94	2	Handle services to image file.\r
	3	\r
	4	Copyright (c) 2006 - 2008, Intel Corporation. <BR>\r
cfe9de52	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
28a00297	12	\r
504214c4	13	**/\r
28a00297	14	\r
9c4ac31c	15	#include "DxeMain.h"\r
ec90508b	16	#include "Image.h"\r
28a00297	17	\r
c0a23f8c	18	/**\r
	19	Search a handle to a device on a specified device path that supports a specified protocol,\r
	20	interface of that protocol on that handle is another output.\r
	21	\r
61ad8a41	22	\r
61ad8a41	23	\r
c0a23f8c	24	@param Protocol The protocol to search for\r
	25	@param FilePath The specified device path\r
	26	@param Interface Interface of the protocol on the handle\r
	27	@param Handle The handle to the device on the specified device\r
	28	path that supports the protocol.\r
	29	\r
	30	@return Status code.\r
	31	\r
	32	**/\r
	33	EFI_STATUS\r
	34	CoreDevicePathToInterface (\r
	35	IN EFI_GUID *Protocol,\r
	36	IN EFI_DEVICE_PATH_PROTOCOL **FilePath,\r
	37	OUT VOID **Interface,\r
	38	OUT EFI_HANDLE *Handle\r
	39	)\r
	40	{\r
	41	EFI_STATUS Status;\r
	42	\r
	43	Status = CoreLocateDevicePath (Protocol, FilePath, Handle);\r
	44	if (!EFI_ERROR (Status)) {\r
	45	Status = CoreHandleProtocol (*Handle, Protocol, Interface);\r
	46	}\r
	47	return Status;\r
	48	}\r
	49	\r
162ed594	50	\r
	51	/**\r
	52	Opens a file for (simple) reading. The simple read abstraction\r
	53	will access the file either from a memory copy, from a file\r
	54	system interface, or from the load file interface.\r
	55	\r
022c6d45	56	@param BootPolicy Policy for Open Image File.\r
	57	@param SourceBuffer Pointer to the memory location containing copy\r
	58	of the image to be loaded.\r
	59	@param SourceSize The size in bytes of SourceBuffer.\r
	60	@param FilePath The specific file path from which the image is\r
	61	loaded\r
	62	@param DeviceHandle Pointer to the return device handle.\r
	63	@param ImageFileHandle Pointer to the image file handle.\r
	64	@param AuthenticationStatus Pointer to a caller-allocated UINT32 in which\r
	65	the authentication status is returned.\r
	66	\r
	67	@retval EFI_SUCCESS Image file successfully opened.\r
	68	@retval EFI_LOAD_ERROR If the caller passed a copy of the file, and\r
	69	SourceSize is 0.\r
	70	@retval EFI_INVALID_PARAMETER File path is not valid.\r
162ed594	71	@retval EFI_NOT_FOUND File not found.\r
	72	\r
	73	**/\r
28a00297	74	EFI_STATUS\r
	75	CoreOpenImageFile (\r
	76	IN BOOLEAN BootPolicy,\r
	77	IN VOID *SourceBuffer OPTIONAL,\r
	78	IN UINTN SourceSize,\r
cfe9de52	79	IN OUT EFI_DEVICE_PATH_PROTOCOL **FilePath,\r
28a00297	80	OUT EFI_HANDLE *DeviceHandle,\r
	81	IN IMAGE_FILE_HANDLE *ImageFileHandle,\r
	82	OUT UINT32 *AuthenticationStatus\r
	83	)\r
28a00297	84	{\r
	85	EFI_STATUS Status;\r
	86	EFI_DEVICE_PATH_PROTOCOL *TempFilePath;\r
	87	FILEPATH_DEVICE_PATH *FilePathNode;\r
	88	MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FwVolFilePathNode;\r
	89	EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *Volume;\r
	90	EFI_FILE_HANDLE FileHandle;\r
	91	EFI_FILE_HANDLE LastHandle;\r
	92	EFI_LOAD_FILE_PROTOCOL *LoadFile;\r
0c2b5da8	93	EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;\r
28a00297	94	EFI_SECTION_TYPE SectionType;\r
	95	UINT8 *Pe32Buffer;\r
	96	UINTN Pe32BufferSize;\r
	97	EFI_FV_FILETYPE Type;\r
	98	EFI_FV_FILE_ATTRIBUTES Attrib;\r
	99	EFI_FILE_INFO *FileInfo;\r
	100	UINTN FileInfoSize;\r
	101	EFI_GUID *NameGuid;\r
1564e9ac	102	FILEPATH_DEVICE_PATH *OriginalFilePathNode;\r
28a00297	103	\r
1564e9ac	104	OriginalFilePathNode = NULL;\r
28a00297	105	*AuthenticationStatus = 0;\r
	106	ZeroMem (ImageFileHandle, sizeof (IMAGE_FILE_HANDLE));\r
	107	ImageFileHandle->Signature = IMAGE_FILE_HANDLE_SIGNATURE;\r
	108	\r
	109	//\r
	110	// If the caller passed a copy of the file, then just use it\r
	111	//\r
	112	if (SourceBuffer != NULL) {\r
	113	ImageFileHandle->Source = SourceBuffer;\r
	114	ImageFileHandle->SourceSize = SourceSize;\r
e94a9ff7	115	*DeviceHandle = NULL;\r
cfe9de52	116	CoreLocateDevicePath (&gEfiDevicePathProtocolGuid, FilePath, DeviceHandle);\r
28a00297	117	if (SourceSize > 0) {\r
	118	Status = EFI_SUCCESS;\r
	119	} else {\r
	120	Status = EFI_LOAD_ERROR;\r
	121	}\r
	122	goto Done;\r
	123	}\r
	124	\r
	125	//\r
	126	// Make sure FilePath is valid\r
	127	//\r
cfe9de52	128	if (*FilePath == NULL) {\r
28a00297	129	return EFI_INVALID_PARAMETER;\r
	130	}\r
	131	\r
	132	//\r
	133	// Check to see if it's in a Firmware Volume\r
	134	//\r
cfe9de52	135	FwVolFilePathNode = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH ) FilePath;\r
28a00297	136	Status = CoreDevicePathToInterface (\r
cfe9de52	137	&gEfiFirmwareVolume2ProtocolGuid,\r
	138	(EFI_DEVICE_PATH_PROTOCOL **)&FwVolFilePathNode,\r
	139	(VOID*)&FwVol,\r
28a00297	140	DeviceHandle\r
	141	);\r
	142	if (!EFI_ERROR (Status)) {\r
	143	//\r
	144	// For FwVol File system there is only a single file name that is a GUID.\r
	145	//\r
	146	NameGuid = EfiGetNameGuidFromFwVolDevicePathNode (FwVolFilePathNode);\r
	147	if (NameGuid != NULL) {\r
	148	\r
	149	SectionType = EFI_SECTION_PE32;\r
	150	Pe32Buffer = NULL;\r
	151	Status = FwVol->ReadSection (\r
cfe9de52	152	FwVol,\r
	153	NameGuid,\r
	154	SectionType,\r
28a00297	155	0,\r
	156	(VOID **)&Pe32Buffer,\r
	157	&Pe32BufferSize,\r
	158	AuthenticationStatus\r
	159	);\r
	160	if (EFI_ERROR (Status)) {\r
	161	//\r
	162	// Try a raw file, since a PE32 SECTION does not exist\r
	163	//\r
	164	if (Pe32Buffer != NULL) {\r
	165	CoreFreePool (Pe32Buffer);\r
	166	*AuthenticationStatus = 0;\r
	167	}\r
	168	Pe32Buffer = NULL;\r
	169	Status = FwVol->ReadFile (\r
cfe9de52	170	FwVol,\r
cfe9de52	171	NameGuid,\r
28a00297	172	(VOID **)&Pe32Buffer,\r
	173	&Pe32BufferSize,\r
	174	&Type,\r
	175	&Attrib,\r
	176	AuthenticationStatus\r
	177	);\r
	178	}\r
cfe9de52	179	\r
28a00297	180	if (!EFI_ERROR (Status)) {\r
	181	//\r
	182	// One of the reads passed so we are done\r
	183	//\r
	184	ImageFileHandle->Source = Pe32Buffer;\r
	185	ImageFileHandle->SourceSize = Pe32BufferSize;\r
	186	ImageFileHandle->FreeBuffer = TRUE;\r
	187	goto Done;\r
	188	}\r
	189	}\r
	190	}\r
	191	\r
	192	//\r
	193	// Attempt to access the file via a file system interface\r
	194	//\r
cfe9de52	195	FilePathNode = (FILEPATH_DEVICE_PATH ) FilePath;\r
28a00297	196	Status = CoreDevicePathToInterface (\r
cfe9de52	197	&gEfiSimpleFileSystemProtocolGuid,\r
	198	(EFI_DEVICE_PATH_PROTOCOL **)&FilePathNode,\r
	199	(VOID*)&Volume,\r
28a00297	200	DeviceHandle\r
	201	);\r
	202	if (!EFI_ERROR (Status)) {\r
	203	//\r
	204	// Open the Volume to get the File System handle\r
	205	//\r
	206	Status = Volume->OpenVolume (Volume, &FileHandle);\r
	207	if (!EFI_ERROR (Status)) {\r
28a00297	208	//\r
1564e9ac	209	// Duplicate the device path to avoid the access to unaligned device path node.\r
1564e9ac	210	// Because the device path consists of one or more FILE PATH MEDIA DEVICE PATH\r
022c6d45	211	// nodes, It assures the fields in device path nodes are 2 byte aligned.\r
28a00297	212	//\r
9c4ac31c	213	FilePathNode = (FILEPATH_DEVICE_PATH )DuplicateDevicePath((EFI_DEVICE_PATH_PROTOCOL )(UINTN)FilePathNode);\r
1564e9ac	214	if (FilePathNode == NULL) {\r
	215	FileHandle->Close (FileHandle);\r
	216	Status = EFI_OUT_OF_RESOURCES;\r
	217	} else {\r
	218	OriginalFilePathNode = FilePathNode;\r
	219	//\r
	220	// Parse each MEDIA_FILEPATH_DP node. There may be more than one, since the\r
	221	// directory information and filename can be seperate. The goal is to inch\r
	222	// our way down each device path node and close the previous node\r
	223	//\r
	224	while (!IsDevicePathEnd (&FilePathNode->Header)) {\r
	225	if (DevicePathType (&FilePathNode->Header) != MEDIA_DEVICE_PATH \|\|\r
	226	DevicePathSubType (&FilePathNode->Header) != MEDIA_FILEPATH_DP) {\r
	227	Status = EFI_UNSUPPORTED;\r
	228	}\r
	229	\r
	230	if (EFI_ERROR (Status)) {\r
	231	//\r
	232	// Exit loop on Error\r
	233	//\r
	234	break;\r
	235	}\r
	236	\r
	237	LastHandle = FileHandle;\r
	238	FileHandle = NULL;\r
	239	\r
	240	Status = LastHandle->Open (\r
	241	LastHandle,\r
	242	&FileHandle,\r
	243	FilePathNode->PathName,\r
	244	EFI_FILE_MODE_READ,\r
	245	0\r
	246	);\r
28a00297	247	\r
28a00297	248	//\r
1564e9ac	249	// Close the previous node\r
28a00297	250	//\r
1564e9ac	251	LastHandle->Close (LastHandle);\r
28a00297	252	\r
1564e9ac	253	FilePathNode = (FILEPATH_DEVICE_PATH *) NextDevicePathNode (&FilePathNode->Header);\r
1564e9ac	254	}\r
28a00297	255	//\r
022c6d45	256	// Free the allocated memory pool\r
28a00297	257	//\r
1564e9ac	258	CoreFreePool(OriginalFilePathNode);\r
28a00297	259	}\r
	260	\r
	261	if (!EFI_ERROR (Status)) {\r
	262	//\r
	263	// We have found the file. Now we need to read it. Before we can read the file we need to\r
	264	// figure out how big the file is.\r
	265	//\r
	266	FileInfo = NULL;\r
61ad8a41	267	FileInfoSize = 0;\r
	268	Status = FileHandle->GetInfo (\r
	269	FileHandle,\r
	270	&gEfiFileInfoGuid,\r
	271	&FileInfoSize,\r
	272	FileInfo\r
	273	);\r
	274	if (Status == EFI_BUFFER_TOO_SMALL) {\r
	275	FileInfo = AllocatePool (FileInfoSize);\r
	276	if (FileInfo != NULL) {\r
	277	Status = FileHandle->GetInfo (\r
	278	FileHandle,\r
	279	&gEfiFileInfoGuid,\r
	280	&FileInfoSize,\r
	281	FileInfo\r
	282	);\r
	283	} else {\r
	284	Status = EFI_OUT_OF_RESOURCES;\r
	285	goto Done;\r
	286	}\r
28a00297	287	}\r
61ad8a41	288	\r
28a00297	289	if (!EFI_ERROR (Status)) {\r
	290	//\r
	291	// Allocate space for the file\r
	292	//\r
9c4ac31c	293	ImageFileHandle->Source = AllocatePool ((UINTN)FileInfo->FileSize);\r
28a00297	294	if (ImageFileHandle->Source != NULL) {\r
	295	//\r
	296	// Read the file into the buffer we allocated\r
	297	//\r
e94a9ff7	298	ImageFileHandle->SourceSize = (UINTN) FileInfo->FileSize;\r
28a00297	299	ImageFileHandle->FreeBuffer = TRUE;\r
	300	Status = FileHandle->Read (FileHandle, &ImageFileHandle->SourceSize, ImageFileHandle->Source);\r
	301	\r
	302	//\r
	303	// Close the file since we are done\r
	304	//\r
	305	FileHandle->Close (FileHandle);\r
61ad8a41	306	CoreFreePool (FileInfo);\r
28a00297	307	} else {\r
	308	Status = EFI_OUT_OF_RESOURCES;\r
	309	}\r
	310	\r
	311	goto Done;\r
	312	}\r
	313	}\r
	314	}\r
cfe9de52	315	}\r
28a00297	316	\r
	317	\r
	318	//\r
	319	// Try LoadFile style\r
	320	//\r
	321	\r
cfe9de52	322	TempFilePath = *FilePath;\r
28a00297	323	Status = CoreDevicePathToInterface (\r
e94a9ff7	324	&gEfiLoadFileProtocolGuid,\r
	325	&TempFilePath,\r
	326	(VOID*) &LoadFile,\r
	327	DeviceHandle\r
	328	);\r
28a00297	329	if (!EFI_ERROR (Status)) {\r
	330	//\r
	331	// Call LoadFile with the correct buffer size\r
	332	//\r
61ad8a41	333	ASSERT (ImageFileHandle->SourceSize == 0);\r
	334	ASSERT (ImageFileHandle->Source == NULL);\r
	335	Status = LoadFile->LoadFile (\r
	336	LoadFile,\r
	337	TempFilePath,\r
	338	BootPolicy,\r
	339	&ImageFileHandle->SourceSize,\r
	340	ImageFileHandle->Source\r
	341	);\r
	342	if (Status == EFI_BUFFER_TOO_SMALL) {\r
	343	ImageFileHandle->Source = AllocatePool (ImageFileHandle->SourceSize);\r
	344	if (ImageFileHandle->Source == NULL) {\r
	345	Status = EFI_OUT_OF_RESOURCES;\r
	346	} else {\r
	347	Status = LoadFile->LoadFile (\r
	348	LoadFile,\r
	349	TempFilePath,\r
	350	BootPolicy,\r
	351	&ImageFileHandle->SourceSize,\r
	352	ImageFileHandle->Source\r
	353	);\r
28a00297	354	}\r
	355	}\r
	356	\r
4792a1a6	357	if (!EFI_ERROR (Status)) {\r
28a00297	358	ImageFileHandle->FreeBuffer = TRUE;\r
	359	goto Done;\r
	360	}\r
	361	}\r
	362	\r
	363	//\r
	364	// Nothing else to try\r
	365	//\r
61ad8a41	366	DEBUG ((DEBUG_LOAD\|DEBUG_WARN, "CoreOpenImageFile: Device did not support a known load protocol\n"));\r
28a00297	367	Status = EFI_NOT_FOUND;\r
	368	\r
	369	Done:\r
28a00297	370	//\r
	371	// If the file was not accessed, clean up\r
	372	//\r
4792a1a6	373	if (EFI_ERROR (Status)) {\r
28a00297	374	if (ImageFileHandle->FreeBuffer) {\r
	375	//\r
	376	// Free the source buffer if we allocated it\r
	377	//\r
	378	CoreFreePool (ImageFileHandle->Source);\r
	379	}\r
	380	}\r
	381	\r
	382	return Status;\r
	383	}\r
	384	\r
	385	\r
	386	\r
162ed594	387	/**\r
	388	Read image file (specified by UserHandle) into user specified buffer with specified offset\r
	389	and length.\r
	390	\r
022c6d45	391	@param UserHandle Image file handle\r
	392	@param Offset Offset to the source file\r
	393	@param ReadSize For input, pointer of size to read; For output,\r
	394	pointer of size actually read.\r
	395	@param Buffer Buffer to write into\r
162ed594	396	\r
022c6d45	397	@retval EFI_SUCCESS Successfully read the specified part of file\r
162ed594	398	into buffer.\r
	399	\r
	400	**/\r
28a00297	401	EFI_STATUS\r
	402	EFIAPI\r
	403	CoreReadImageFile (\r
	404	IN VOID *UserHandle,\r
	405	IN UINTN Offset,\r
	406	IN OUT UINTN *ReadSize,\r
	407	OUT VOID *Buffer\r
	408	)\r
28a00297	409	{\r
	410	UINTN EndPosition;\r
	411	IMAGE_FILE_HANDLE *FHand;\r
	412	\r
	413	FHand = (IMAGE_FILE_HANDLE *)UserHandle;\r
	414	ASSERT (FHand->Signature == IMAGE_FILE_HANDLE_SIGNATURE);\r
	415	\r
	416	//\r
	417	// Move data from our local copy of the file\r
	418	//\r
	419	EndPosition = Offset + *ReadSize;\r
	420	if (EndPosition > FHand->SourceSize) {\r
	421	*ReadSize = (UINT32)(FHand->SourceSize - Offset);\r
cfe9de52	422	}\r
28a00297	423	if (Offset >= FHand->SourceSize) {\r
	424	*ReadSize = 0;\r
	425	}\r
	426	\r
	427	CopyMem (Buffer, (CHAR8 )FHand->Source + Offset, ReadSize);\r
	428	return EFI_SUCCESS;\r
	429	}\r
	430	\r