当前位置: 首页>>代码示例>>C++>>正文

C++ EFI_FILE_HANDLE::GetInfo方法代码示例

本文整理汇总了C++中EFI_FILE_HANDLE::GetInfo方法的典型用法代码示例。如果您正苦于以下问题：C++ EFI_FILE_HANDLE::GetInfo方法的具体用法？C++ EFI_FILE_HANDLE::GetInfo怎么用？C++ EFI_FILE_HANDLE::GetInfo使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类EFI_FILE_HANDLE的用法示例。


在下文中一共展示了EFI_FILE_HANDLE::GetInfo方法的10个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: sizeof

EFI_STATUS
ReadFileFromVol (
  IN  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *Vol,
  IN  CHAR16                      *FileName,
  OUT UINTN                       *BufferSize,
  OUT VOID                        **Buffer
  )
/*++

Routine Description:

  Read a file.
  
Arguments:

  Vol             - File System Volume
  FileName        - The file to be read.
  BufferSize      - The file buffer size
  Buffer          - The file buffer

Returns:

  EFI_SUCCESS    - read file successfully
  EFI_NOT_FOUND  - file not found

--*/
{
  EFI_STATUS                        Status;
  EFI_FILE_HANDLE                   RootDir;
  EFI_FILE_HANDLE                   Handle;
  UINTN                             FileInfoSize;
  EFI_FILE_INFO                     *FileInfo;
  UINTN                             TempBufferSize;
  VOID                              *TempBuffer;

  //
  // Open the root directory
  //
  Status = Vol->OpenVolume (Vol, &RootDir);
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Open the file
  //
  Status = RootDir->Open (
                      RootDir,
                      &Handle,
                      FileName,
                      EFI_FILE_MODE_READ,
                      0
                      );
  if (EFI_ERROR (Status)) {
    RootDir->Close (RootDir);
    return Status;
  }

  RootDir->Close (RootDir);

  //
  // Get the file information
  //
  FileInfoSize = sizeof(EFI_FILE_INFO) + 1024;

  FileInfo = EfiLibAllocateZeroPool (FileInfoSize);
  if (FileInfo == NULL) {
    Handle->Close (Handle);
    return Status;
  }

  Status = Handle->GetInfo (
                     Handle,
                     &gEfiFileInfoGuid,
                     &FileInfoSize,
                     FileInfo
                     );
  if (EFI_ERROR (Status)) {
    Handle->Close (Handle);
    gBS->FreePool (FileInfo);
    return Status;
  }

  //
  // Allocate buffer for the file data. The last CHAR16 is for L'\0'
  //
  TempBufferSize = (UINTN) FileInfo->FileSize + sizeof(CHAR16);
  TempBuffer = EfiLibAllocateZeroPool (TempBufferSize);
  if (TempBuffer == NULL) {
    Handle->Close (Handle);
    gBS->FreePool (FileInfo);
    return Status;
  }

  gBS->FreePool (FileInfo);

  //
  // Read the file data to the buffer
  //
  Status = Handle->Read (
//.........这里部分代码省略.........
开发者ID:Kohrara，项目名称:edk，代码行数:101，代码来源:EdbSupportFile.c

示例2: headers

/**
  Get the headers (dos, image, optional header) from an image

  @param  Device                SimpleFileSystem device handle
  @param  FileName              File name for the image
  @param  DosHeader             Pointer to dos header
  @param  Hdr                   The buffer in which to return the PE32, PE32+, or TE header.

  @retval EFI_SUCCESS           Successfully get the machine type.
  @retval EFI_NOT_FOUND         The file is not found.
  @retval EFI_LOAD_ERROR        File is not a valid image file.

**/
EFI_STATUS
EFIAPI
BdsLibGetImageHeader (
  IN  EFI_HANDLE                  Device,
  IN  CHAR16                      *FileName,
  OUT EFI_IMAGE_DOS_HEADER        *DosHeader,
  OUT EFI_IMAGE_OPTIONAL_HEADER_PTR_UNION   Hdr
  )
{
  EFI_STATUS                       Status;
  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL  *Volume;
  EFI_FILE_HANDLE                  Root;
  EFI_FILE_HANDLE                  ThisFile;
  UINTN                            BufferSize;
  UINT64                           FileSize;
  EFI_FILE_INFO                    *Info;

  Root     = NULL;
  ThisFile = NULL;
  //
  // Handle the file system interface to the device
  //
  Status = gBS->HandleProtocol (
                  Device,
                  &gEfiSimpleFileSystemProtocolGuid,
                  (VOID *) &Volume
                  );
  if (EFI_ERROR (Status)) {
    goto Done;
  }

  Status = Volume->OpenVolume (
                     Volume,
                     &Root
                     );
  if (EFI_ERROR (Status)) {
    Root = NULL;
    goto Done;
  }
//  ASSERT (Root != NULL);
  Status = Root->Open (Root, &ThisFile, FileName, EFI_FILE_MODE_READ, 0);
  if (EFI_ERROR (Status)) {
    goto Done;
  }
 // ASSERT (ThisFile != NULL);

  //
  // Get file size
  //
  BufferSize  = SIZE_OF_EFI_FILE_INFO + 200;
  do {
    Info   = NULL;
    Status = gBS->AllocatePool (EfiBootServicesData, BufferSize, (VOID **) &Info);
    if (EFI_ERROR (Status)) {
      goto Done;
    }
    Status = ThisFile->GetInfo (
                         ThisFile,
                         &gEfiFileInfoGuid,
                         &BufferSize,
                         Info
                         );
    if (!EFI_ERROR (Status)) {
      break;
    }
    if (Status != EFI_BUFFER_TOO_SMALL) {
      FreePool (Info);
      goto Done;
    }
    FreePool (Info);
  } while (TRUE);

  FileSize = Info->FileSize;
  FreePool (Info);

  //
  // Read dos header
  //
  BufferSize = sizeof (EFI_IMAGE_DOS_HEADER);
  Status = ThisFile->Read (ThisFile, &BufferSize, DosHeader);
  if (EFI_ERROR (Status) ||
      BufferSize < sizeof (EFI_IMAGE_DOS_HEADER) ||
      FileSize <= DosHeader->e_lfanew ||
      DosHeader->e_magic != EFI_IMAGE_DOS_SIGNATURE) {
    Status = EFI_LOAD_ERROR;
    goto Done;
  }
//.........这里部分代码省略.........
开发者ID:jief666，项目名称:clover，代码行数:101，代码来源:BdsMisc.c

示例3: AsciiStrToUnicodeStr

/**
Internal work function to fill in EFI_OPEN_FILE information for the Fs and BlkIo

@param  File        Open file handle
@param  FileName    Name of file after device stripped off


**/
EFI_STATUS
EblFileDevicePath (
  IN OUT EFI_OPEN_FILE  *File,
  IN  CHAR8             *FileName,
  IN  CONST UINT64      OpenMode
  )
{
  EFI_STATUS                        Status;
  UINTN                             Size;
  FILEPATH_DEVICE_PATH              *FilePath;
  EFI_DEVICE_PATH_PROTOCOL          *FileDevicePath;
  CHAR16                            UnicodeFileName[MAX_PATHNAME];
  EFI_BLOCK_IO_PROTOCOL             *BlkIo;
  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *Fs;
  EFI_FILE_HANDLE                   Root;


  if ( *FileName != 0 ) {
    AsciiStrToUnicodeStr (FileName, UnicodeFileName);
  } else {
    AsciiStrToUnicodeStr ("\\", UnicodeFileName);
  }

  Size = StrSize (UnicodeFileName);
  FileDevicePath = AllocatePool (Size + SIZE_OF_FILEPATH_DEVICE_PATH + sizeof (EFI_DEVICE_PATH_PROTOCOL));
  if (FileDevicePath != NULL) {
    FilePath = (FILEPATH_DEVICE_PATH *) FileDevicePath;
    FilePath->Header.Type    = MEDIA_DEVICE_PATH;
    FilePath->Header.SubType = MEDIA_FILEPATH_DP;
    CopyMem (&FilePath->PathName, UnicodeFileName, Size);
    SetDevicePathNodeLength (&FilePath->Header, Size + SIZE_OF_FILEPATH_DEVICE_PATH);
    SetDevicePathEndNode (NextDevicePathNode (&FilePath->Header));

    if (File->EfiHandle != NULL) {
      File->DevicePath = DevicePathFromHandle (File->EfiHandle);
    }

    File->DevicePath = AppendDevicePath (File->DevicePath, FileDevicePath);
    FreePool (FileDevicePath);
  }

  Status = gBS->HandleProtocol (File->EfiHandle, &gEfiBlockIoProtocolGuid, (VOID **)&BlkIo);
  if (!EFI_ERROR (Status)) {
    File->FsBlockIoMedia = BlkIo->Media;
    File->FsBlockIo = BlkIo;

    // If we are not opening the device this will get over written with file info
    File->MaxPosition = MultU64x32 (BlkIo->Media->LastBlock + 1, BlkIo->Media->BlockSize);
  }

  if (File->Type == EfiOpenFileSystem) {
    Status = gBS->HandleProtocol (File->EfiHandle, &gEfiSimpleFileSystemProtocolGuid, (VOID **)&Fs);
    if (!EFI_ERROR (Status)) {
      Status = Fs->OpenVolume (Fs, &Root);
      if (!EFI_ERROR (Status)) {
        // Get information about the volume
        Size = 0;
        Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, File->FsInfo);
        if (Status == EFI_BUFFER_TOO_SMALL) {
          File->FsInfo = AllocatePool (Size);
          Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, File->FsInfo);
        }

        // Get information about the file
        Status = Root->Open (Root, &File->FsFileHandle, UnicodeFileName, OpenMode, 0);
        if (!EFI_ERROR (Status)) {
          Size = 0;
          Status = File->FsFileHandle->GetInfo (File->FsFileHandle, &gEfiFileInfoGuid, &Size, NULL);
          if (Status == EFI_BUFFER_TOO_SMALL) {
            File->FsFileInfo = AllocatePool (Size);
            Status = File->FsFileHandle->GetInfo (File->FsFileHandle, &gEfiFileInfoGuid, &Size, File->FsFileInfo);
            if (!EFI_ERROR (Status)) {
              File->Size = (UINTN)File->FsFileInfo->FileSize;
              File->MaxPosition = (UINT64)File->Size;
            }
          }
        }

        Root->Close (Root);
      }
    }
  } else if (File->Type == EfiOpenBlockIo) {
    File->Size = (UINTN)File->MaxPosition;
  }

  return Status;
}
开发者ID:M1cha，项目名称:edk2，代码行数:95，代码来源:EfiFileLib.c

示例4: sizeof


//.........这里部分代码省略.........
  //
  // Open the root directory
  //
  Status = Vol->OpenVolume (Vol, &RootDir);
  if (EFI_ERROR (Status)) {
    EFI_SCT_DEBUG ((EFI_SCT_D_ERROR, L"Open volume - %r", Status));
    return Status;
  }

  //
  // Open the file
  //
  Status = RootDir->Open (
                      RootDir,
                      &Handle,
                      FileName,
                      EFI_FILE_MODE_READ,
                      0
                      );
  if (EFI_ERROR (Status)) {
    EFI_SCT_DEBUG ((EFI_SCT_D_ERROR, L"Open file - %r", Status));
    RootDir->Close (RootDir);
    return Status;
  }

  RootDir->Close (RootDir);

  //
  // Get the file information
  //
  FileInfoSize = sizeof(EFI_FILE_INFO) + 1024;

  Status = BS->AllocatePool (
                 EfiBootServicesData,
                 FileInfoSize,
                 &FileInfo
                 );
  if (EFI_ERROR (Status)) {
    EFI_SCT_DEBUG ((EFI_SCT_D_ERROR, L"Allocate pool - %r", Status));
    Handle->Close (Handle);
    return Status;
  }

  ZeroMem (FileInfo, FileInfoSize);

  Status = Handle->GetInfo (
                     Handle,
                     &gEfiFileInfoGuid,
                     &FileInfoSize,
                     FileInfo
                     );
  if (EFI_ERROR (Status)) {
    EFI_SCT_DEBUG ((EFI_SCT_D_ERROR, L"Get file info - %r", Status));
    Handle->Close (Handle);
    BS->FreePool (FileInfo);
    return Status;
  }

  //
  // Allocate buffer for the file data. The last CHAR16 is for L'\0'
  //
  TempBufferSize = (UINTN) FileInfo->FileSize + sizeof(CHAR16);

  Status = BS->AllocatePool (
                 EfiBootServicesData,
                 TempBufferSize,
                 &TempBuffer
                 );
  if (EFI_ERROR (Status)) {
    EFI_SCT_DEBUG ((EFI_SCT_D_ERROR, L"Allocate pool - %r", Status));
    Handle->Close (Handle);
    BS->FreePool (FileInfo);
    return Status;
  }

  ZeroMem (TempBuffer, TempBufferSize);

  BS->FreePool (FileInfo);

  //
  // Read the file data to the buffer
  //
  Status = Handle->Read (
                     Handle,
                     &TempBufferSize,
                     TempBuffer
                     );
  if (EFI_ERROR (Status)) {
    EFI_SCT_DEBUG ((EFI_SCT_D_ERROR, L"Read file - %r", Status));
    Handle->Close (Handle);
    BS->FreePool (TempBuffer);
    return Status;
  }

  Handle->Close (Handle);

  *BufferSize = TempBufferSize;
  *Buffer     = TempBuffer;
  return EFI_SUCCESS;
}
开发者ID:jljusten，项目名称:efi-sct，代码行数:101，代码来源:ReportSupport.c

示例5: sizeof

/**
  Read a file from this volume.

  @param[in]  Vol             File System Volume
  @param[in]  FileName        The file to be read.
  @param[out] BufferSize      The file buffer size
  @param[out] Buffer          The file buffer

  @retval EFI_SUCCESS    Read file successfully
  @retval EFI_NOT_FOUND  File not found
**/
EFI_STATUS
ReadFileFromVol (
  IN  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *Vol,
  IN  CHAR16                            *FileName,
  OUT UINTN                             *BufferSize,
  OUT VOID                              **Buffer
  )
{
  EFI_STATUS                        Status;
  EFI_FILE_HANDLE                   RootDir;
  EFI_FILE_HANDLE                   Handle;
  UINTN                             FileInfoSize;
  EFI_FILE_INFO                     *FileInfo;
  UINTN                             TempBufferSize;
  VOID                              *TempBuffer;

  //
  // Open the root directory
  //
  Status = Vol->OpenVolume (Vol, &RootDir);
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Open the file
  //
  Status = RootDir->Open (
                      RootDir,
                      &Handle,
                      FileName,
                      EFI_FILE_MODE_READ,
                      0
                      );
  if (EFI_ERROR (Status)) {
    RootDir->Close (RootDir);
    return Status;
  }

  RootDir->Close (RootDir);

  //
  // Get the file information
  //
  FileInfoSize = sizeof(EFI_FILE_INFO) + 1024;

  FileInfo = AllocateZeroPool (FileInfoSize);
  if (FileInfo == NULL) {
    Handle->Close (Handle);
    return Status;
  }

  Status = Handle->GetInfo (
                     Handle,
                     &gEfiFileInfoGuid,
                     &FileInfoSize,
                     FileInfo
                     );
  if (EFI_ERROR (Status)) {
    Handle->Close (Handle);
    gBS->FreePool (FileInfo);
    return Status;
  }

  //
  // Allocate buffer for the file data. The last CHAR16 is for L'\0'
  //
  TempBufferSize = (UINTN) FileInfo->FileSize + sizeof(CHAR16);
  TempBuffer = AllocateZeroPool (TempBufferSize);
  if (TempBuffer == NULL) {
    Handle->Close (Handle);
    gBS->FreePool (FileInfo);
    return Status;
  }

  gBS->FreePool (FileInfo);

  //
  // Read the file data to the buffer
  //
  Status = Handle->Read (
                     Handle,
                     &TempBufferSize,
                     TempBuffer
                     );
  if (EFI_ERROR (Status)) {
    Handle->Close (Handle);
    gBS->FreePool (TempBuffer);
    return Status;
//.........这里部分代码省略.........
开发者ID:bale-john，项目名称:edk2，代码行数:101，代码来源:AppSupport.c

示例6: FreePool

/**
Update Device List Global Variables

**/
VOID
EblUpdateDeviceLists (
  VOID
  )
{
  EFI_STATUS                        Status;
  UINTN                             Size;
  EFI_SIMPLE_FILE_SYSTEM_PROTOCOL   *Fs;
  EFI_FILE_HANDLE                   Root;
  UINTN                             Index;

  if (mBlkIo != NULL) {
    FreePool (mBlkIo);
  }
  gBS->LocateHandleBuffer (ByProtocol, &gEfiBlockIoProtocolGuid, NULL, &mBlkIoCount, &mBlkIo);



  if (mFv != NULL) {
    FreePool (mFv);
  }
  gBS->LocateHandleBuffer (ByProtocol, &gEfiFirmwareVolume2ProtocolGuid, NULL, &mFvCount, &mFv);

  if (mLoadFile != NULL) {
    FreePool (mLoadFile);
  }
  gBS->LocateHandleBuffer (ByProtocol, &gEfiLoadFileProtocolGuid, NULL, &mLoadFileCount, &mLoadFile);

  if (mFs != NULL) {
    FreePool (mFs);
  }

  if (&mFsInfo[0] != NULL) {
    // Need to Free the mFsInfo prior to recalculating mFsCount so don't move this code
    for (Index = 0; Index < mFsCount; Index++) {
      if (mFsInfo[Index] != NULL) {
        FreePool (mFsInfo[Index]);
      }
    }
    FreePool (mFsInfo);
  }

  gBS->LocateHandleBuffer (ByProtocol, &gEfiSimpleFileSystemProtocolGuid, NULL, &mFsCount, &mFs);


  mFsInfo = AllocateZeroPool (mFsCount * sizeof (EFI_FILE_SYSTEM_INFO *));
  if (mFsInfo == NULL) {
    // If we can't do this then we can't support file system entries
    mFsCount = 0;
  } else {
    // Loop through all the file system structures and cache the file system info data
    for (Index =0; Index < mFsCount; Index++) {
      Status = gBS->HandleProtocol (mFs[Index], &gEfiSimpleFileSystemProtocolGuid, (VOID **)&Fs);
      if (!EFI_ERROR (Status)) {
        Status = Fs->OpenVolume (Fs, &Root);
        if (!EFI_ERROR (Status)) {
          // Get information about the volume
          Size = 0;
          Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, mFsInfo[Index]);
          if (Status == EFI_BUFFER_TOO_SMALL) {
            mFsInfo[Index] = AllocatePool (Size);
            Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, mFsInfo[Index]);
          }

          Root->Close (Root);
        }
      }
    }
  }
}
开发者ID:M1cha，项目名称:edk2，代码行数:74，代码来源:EfiFileLib.c

示例7: if


//.........这里部分代码省略.........
							Status = RootFs->Open(RootFs, &FileHandle, BOOTMGFW, EFI_FILE_MODE_READ, 0);
							if(Status == EFI_SUCCESS) {
								/* found it, set DeviceHandle & break the loop */
								DeviceHandle = Search[i];
								break;
							}
							/* clean up for next pass */
							RootFs->Close(RootFs);
						}
						/* free array of device handles, if EFI_SUCCESS break */
						/* the switch/case else fall through to the error */
						BS->FreePool(Search);
						if(Status == EFI_SUCCESS) {
							break;
						}
					}
				}
			default:
				return Status;
			}
		}
	}
	else {
		return Status;
	}

	//============================================================================//
	// RootFs is open, FileHandle is open, DeviceHandle is set                    //
	// get size of bootmgfw.efi by retriving an EFI_FILE_INFO                     //
	// first get the size of the STRUCT and allocate memory                       //
	//============================================================================//

	Size = 0;
	Status = FileHandle->GetInfo(FileHandle, &gFileInfo, &Size, NULL);
	if(Status == EFI_BUFFER_TOO_SMALL) {
		/* allocate memory for EFI_FILE_INFO */
		FileInfoBuffer = (EFI_FILE_INFO *) AllocatePool(Size);
	} 
	else {
		FileHandle->Close(FileHandle);
		RootFs->Close(RootFs);
		return Status;
	}

	//=========================================================================//
	// get EFI_FILE_INFO for bootmgfw.efi                                      //
	//=========================================================================//

	Status = FileHandle->GetInfo(FileHandle, &gFileInfo, &Size, FileInfoBuffer);
	if(EFI_ERROR(Status)) {
		FileHandle->Close(FileHandle);
		RootFs->Close(RootFs);
		return Status;
	}

	//=========================================================================//
	// get size of bootmgfw.efi                                                //
	//=========================================================================//

	Size = FileInfoBuffer->FileSize;

	//=========================================================================//
	// free EFI_FILE_INFO buffer                                               //
	//=========================================================================//

	BS->FreePool(FileInfoBuffer);
开发者ID:KunYi，项目名称:Injector，代码行数:67，代码来源:Main.cpp

示例8: DuplicateDevicePath


//.........这里部分代码省略.........
        while (!EFI_ERROR (Status) && !IsDevicePathEnd (DevicePathNode)) {
          if (DevicePathType (DevicePathNode) != MEDIA_DEVICE_PATH ||
              DevicePathSubType (DevicePathNode) != MEDIA_FILEPATH_DP) {
            Status = EFI_UNSUPPORTED;
            break;
          }
  
          LastHandle = FileHandle;
          FileHandle = NULL;
  
          Status = LastHandle->Open (
                                LastHandle,
                                &FileHandle,
                                ((FILEPATH_DEVICE_PATH *) DevicePathNode)->PathName,
                                EFI_FILE_MODE_READ,
                                0
                                );
  
          //
          // Close the previous node
          //
          LastHandle->Close (LastHandle);
  
          DevicePathNode = NextDevicePathNode (DevicePathNode);
        }
  
        if (!EFI_ERROR (Status)) {
          //
          // We have found the file. Now we need to read it. Before we can read the file we need to
          // figure out how big the file is.
          //
          FileInfo = NULL;
          FileInfoSize = 0;
          Status = FileHandle->GetInfo (
                                FileHandle,
                                &gEfiFileInfoGuid,
                                &FileInfoSize,
                                FileInfo
                                );
  
          if (Status == EFI_BUFFER_TOO_SMALL) {
            FileInfo = AllocatePool (FileInfoSize);
            if (FileInfo == NULL) {
              Status = EFI_OUT_OF_RESOURCES;
            } else {
              Status = FileHandle->GetInfo (
                                    FileHandle,
                                    &gEfiFileInfoGuid,
                                    &FileInfoSize,
                                    FileInfo
                                    );
            }
          }
          
          if (!EFI_ERROR (Status) && (FileInfo != NULL)) {
            //
            // Allocate space for the file
            //
            ImageBuffer = AllocatePool ((UINTN)FileInfo->FileSize);
            if (ImageBuffer == NULL) {
              Status = EFI_OUT_OF_RESOURCES;
            } else {
              //
              // Read the file into the buffer we allocated
              //
              ImageBufferSize = (UINTN)FileInfo->FileSize;
开发者ID:hsienchieh，项目名称:uefilab，代码行数:67，代码来源:DxeServicesLib.c

示例9: GetFloppyDevicePath


//.........这里部分代码省略.........
                     &gEfiSimpleFileSystemProtocolGuid,
                     (VOID*)&Vol
                     );
    if (EFI_ERROR(Status) ) {
      return Status;
    }
    Status = Vol->OpenVolume (Vol, &RootDir);
  }
  if (EFI_ERROR(Status) ) {
    return Status;
  }

  //
  // Open file for read
  //
  Status = RootDir->Open (
                      RootDir,
                      &Handle,
                      FileName,
                      EFI_FILE_MODE_READ,
                      0
                      );
  if (EFI_ERROR(Status) ) {
    RootDir->Close (RootDir);
    return Status;
  }


  //
  // Get file size
  //
  FileInfoSize = 1;
  Status = gtBS->AllocatePool (
                   EfiBootServicesData,
                   FileInfoSize,
                   &FileInfo
                   );
  if (EFI_ERROR(Status) ) {
    Handle->Close (Handle);
    RootDir->Close (RootDir);
    return Status;
  }
  //
  // the return code should be EFI_BUFFER_TOO_SMALL
  //
  Status = Handle->GetInfo (
                     Handle,
                     &gEfiFileInfoGuid,
                     &FileInfoSize,
                     FileInfo
                     );

  gtBS->FreePool (FileInfo);
  Status = gtBS->AllocatePool (
                   EfiBootServicesData,
                   FileInfoSize,
                   &FileInfo
                   );
  if (EFI_ERROR(Status) ) {
    Handle->Close (Handle);
    RootDir->Close (RootDir);
    return Status;
  }
  Status = Handle->GetInfo (
                     Handle,
                     &gEfiFileInfoGuid,
                     &FileInfoSize,
                     FileInfo
                     );
  FileSize = (UINTN)FileInfo->FileSize;
  gtBS->FreePool (FileInfo);

  //
  // Read the file
  //
  Status = gtBS->AllocatePool (
                   EfiBootServicesData,
                   FileSize,
                   &FileBuffer
                   );
  if (EFI_ERROR(Status) ) {
    Handle->Close (Handle);
    RootDir->Close (RootDir);
    return Status;
  }
  Status = Handle->Read (
                     Handle,
                     &FileSize,
                     FileBuffer
                     );
  if (EFI_ERROR(Status) ) {
    gtBS->FreePool (FileBuffer);
  } else {
    *Buffer = FileBuffer;
    *Length = (UINT32)FileSize;
  }
  Handle->Close (Handle);
  RootDir->Close (RootDir);
  return Status;
}
开发者ID:jljusten，项目名称:efi-sct，代码行数:101，代码来源:BisBBTestMain.c

示例10: BootLog


//.........这里部分代码省略.........
								  (VOID *) &Volume
								  );
	if (EFI_ERROR (Status)) {
		return EFI_ABORTED;
	}

	//		DBG(L"Volume found\n");
	//
	// Open the root directory of the volume
	//
	if (!EFI_ERROR (Status)) {
		Status = Volume->OpenVolume (Volume, &Root);
	}
#else //Multiple FS protocols
	EFI_HANDLE            *mFs = NULL;
	UINTN                 mFsCount = 0;
	// mFsInfo[] array entries must match mFs[] handles
	EFI_FILE_SYSTEM_INFO  **mFsInfo = NULL;
	
	gBS->LocateHandleBuffer (ByProtocol, &gEfiSimpleFileSystemProtocolGuid, NULL, &mFsCount, &mFs);
	mFsInfo = AllocateZeroPool (mFsCount * sizeof (EFI_FILE_SYSTEM_INFO *));
	if (mFsInfo == NULL) {
		// If we can't do this then we can't support file system entries
		mFsCount = 0;
	} else {
		// Loop through all the file system structures and cache the file system info data
		for (Index =0; Index < mFsCount; Index++) {
			Status = gBS->HandleProtocol (mFs[Index], &gEfiSimpleFileSystemProtocolGuid, (VOID **)&Volume);
			if (!EFI_ERROR (Status)) {
				Status = Volume->OpenVolume (Volume, &Root);
				if (!EFI_ERROR (Status)) {
					// Get information about the volume
/*					Size = 0;
					Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, mFsInfo[Index]);
					if (Status == EFI_BUFFER_TOO_SMALL) {
						mFsInfo[Index] = AllocatePool (Size);
						Status = Root->GetInfo (Root, &gEfiFileSystemInfoGuid, &Size, mFsInfo[Index]);
					}
*/					
//					Root->Close (Root);
					break; //I will stop at first volume
					//TODO try to find DSDT in all volumes
				}
			}
		}
  }
#endif	
	FileName = AllocateZeroPool(32); //Should be enough
	//
	// Read tables from the first volume.
	//
	for (Index=0; Index<NUM_TABLES; Index++) {
		StrCpyS(FileName, 32, ACPInames[Index]);
//		DBG(L"File probe %s\n", FileName);
		Status = Root->Open (Root, &ThisFile, FileName, EFI_FILE_MODE_READ, 0);
		if (EFI_ERROR (Status)) {
			continue;
		}
		/* Get right size we need to allocate */
		Status = ThisFile->GetInfo (
									ThisFile,
									&gEfiFileInfoGuid,
									&BufferSize,
									Info
									);
		if (EFI_ERROR(Status) && Status != EFI_BUFFER_TOO_SMALL) {
开发者ID:jief666，项目名称:clover，代码行数:67，代码来源:AcpiPlatform.c


注：本文中的EFI_FILE_HANDLE::GetInfo方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。