Ejemplo n.º 1
0
/**
  Searches the FFS file the the currently executing module was loaded from and returns the first matching FFS section.

  This function searches the FFS file that the currently executing module was loaded from for a FFS sections of type SectionType.
  If the FFS file contains at least SectionInstance instances of the FFS section specified by SectionType, 
  then the SectionInstance instance is returned in Buffer. Buffer is allocated using AllocatePool(), 
  and the size of the allocated buffer is returned in Size. It is the caller's responsibility 
  to use FreePool() to free the allocated buffer. See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for 
  details on how sections are retrieved from an FFS file based on SectionType and SectionInstance.

  If the currently executing module was not loaded from an FFS file, then EFI_NOT_FOUND is returned.
  If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, 
  the search will be retried with a section type of EFI_SECTION_PE32.
  This function must be called with a TPL <= TPL_NOTIFY.
  
  If Buffer is NULL, then ASSERT().
  If Size is NULL, then ASSERT().


  @param  SectionType          Indicates the FFS section type to search for within 
                               the FFS file that the currently executing module 
                               was loaded from.
  @param  SectionInstance      Indicates which section instance to retrieve within 
                               the FFS file that the currently executing module 
                               was loaded from.
  @param  Buffer               On output, a pointer to a callee allocated buffer 
                               containing the FFS file section that was found.  
                               Is it the caller's responsibility to free this buffer 
                               using FreePool().
  @param  Size                 On output, a pointer to the size, in bytes, of Buffer.

  @retval  EFI_SUCCESS          The specified FFS section was returned.
  @retval  EFI_NOT_FOUND        The specified FFS section could not be found.
  @retval  EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve 
                                the matching FFS section.
  @retval  EFI_DEVICE_ERROR     The FFS section could not be retrieves due to a 
                                device error.
  @retval  EFI_ACCESS_DENIED    The FFS section could not be retrieves because the 
                                firmware volume that contains the matching FFS 
                                section does not allow reads.  
  
**/
EFI_STATUS
EFIAPI
GetSectionFromFfs (
  IN  EFI_SECTION_TYPE              SectionType,
  IN  UINTN                         SectionInstance,
  OUT VOID                          **Buffer,
  OUT UINTN                         *Size
    )
{
  return InternalGetSectionFromFv(
           InternalImageHandleToFvHandle(gImageHandle),
           &gEfiCallerIdGuid,
           SectionType,
           SectionInstance,
           Buffer,
           Size
           );
}
Ejemplo n.º 2
0
/**
  Searches the firmware volume that the currently executing module was loaded from and returns the first matching FFS section. 

  This function searches the firmware volume that the currently executing module was loaded 
  from for an FFS file with an FFS filename specified by NameGuid. If the FFS file is found a search 
  is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance 
  instances of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer.
  Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. 
  It is the caller's responsibility to use FreePool() to free the allocated buffer. 
  See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections are retrieved from 
  an FFS file based on SectionType and SectionInstance.

  If the currently executing module was not loaded from a firmware volume, then EFI_NOT_FOUND is returned.
  If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, 
  the search will be retried with a section type of EFI_SECTION_PE32.
  
  This function must be called with a TPL <= TPL_NOTIFY.
  If NameGuid is NULL, then ASSERT().
  If Buffer is NULL, then ASSERT().
  If Size is NULL, then ASSERT().

  @param  NameGuid             A pointer to to the FFS filename GUID to search for 
                               within the firmware volumes that the currently 
                               executing module was loaded from.
  @param  SectionType          Indicates the FFS section type to search for within 
                               the FFS file specified by NameGuid.
  @param  SectionInstance      Indicates which section instance within the FFS file 
                               specified by NameGuid to retrieve.
  @param  Buffer               On output, a pointer to a callee allocated buffer 
                               containing the FFS file section that was found.  
                               Is it the caller's responsibility to free this buffer 
                               using FreePool().
  @param  Size                 On output, a pointer to the size, in bytes, of Buffer.


  @retval  EFI_SUCCESS          The specified FFS section was returned.
  @retval  EFI_NOT_FOUND        The specified FFS section could not be found.
  @retval  EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve 
                                the matching FFS section.
  @retval  EFI_DEVICE_ERROR     The FFS section could not be retrieves due to a 
                                device error.
  @retval  EFI_ACCESS_DENIED    The FFS section could not be retrieves because the 
                                firmware volume that contains the matching FFS 
                                section does not allow reads.  
**/
EFI_STATUS
EFIAPI
GetSectionFromFv (
  IN  CONST EFI_GUID                *NameGuid,
  IN  EFI_SECTION_TYPE              SectionType,
  IN  UINTN                         SectionInstance,
  OUT VOID                          **Buffer,
  OUT UINTN                         *Size
    )
{
  return InternalGetSectionFromFv (
           InternalImageHandleToFvHandle(gImageHandle),
           NameGuid,
           SectionType,
           SectionInstance,
           Buffer,
           Size
           );
}
Ejemplo n.º 3
0
/**
  Searches all the available firmware volumes and returns the first matching FFS section. 

  This function searches all the firmware volumes for FFS files with FV file type specified by FileType
  The order that the firmware volumes is searched is not deterministic. For each available FV a search 
  is made for FFS file of type FileType. If the FV contains more than one FFS file with the same FileType, 
  the FileInstance instance will be the matched FFS file. For each FFS file found a search 
  is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances 
  of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer. 
  Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. 
  It is the caller's responsibility to use FreePool() to free the allocated buffer.  
  See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections 
  are retrieved from an FFS file based on SectionType and SectionInstance.

  If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, 
  the search will be retried with a section type of EFI_SECTION_PE32.
  This function must be called with a TPL <= TPL_NOTIFY.

  If Buffer is NULL, then ASSERT().
  If Size is NULL, then ASSERT().

  @param  FileType             Indicates the FV file type to search for within all 
                               available FVs.
  @param  FileInstance         Indicates which file instance within all available 
                               FVs specified by FileType.
                               FileInstance starts from zero.
  @param  SectionType          Indicates the FFS section type to search for 
                               within the FFS file 
                               specified by FileType with FileInstance.
  @param  SectionInstance      Indicates which section instance within the FFS file 
                               specified by FileType with FileInstance to retrieve. 
                               SectionInstance starts from zero.
  @param  Buffer               On output, a pointer to a callee allocated buffer 
                               containing the FFS file section that was found.
                               Is it the caller's responsibility to free this 
                               buffer using FreePool().
  @param  Size                 On output, a pointer to the size, in bytes, of Buffer.

  @retval  EFI_SUCCESS          The specified FFS section was returned.
  @retval  EFI_NOT_FOUND        The specified FFS section could not be found.
  @retval  EFI_OUT_OF_RESOURCES There are not enough resources available to retrieve 
                                the matching FFS section.
  @retval  EFI_DEVICE_ERROR     The FFS section could not be retrieves due to a 
                                device error.
  @retval  EFI_ACCESS_DENIED    The FFS section could not be retrieves because 
                                the firmware volume that 
                                contains the matching FFS section does not allow reads.
**/
EFI_STATUS
EFIAPI
GetSectionFromAnyFvByFileType  (
  IN  EFI_FV_FILETYPE               FileType,
  IN  UINTN                         FileInstance,
  IN  EFI_SECTION_TYPE              SectionType,
  IN  UINTN                         SectionInstance,
  OUT VOID                          **Buffer,
  OUT UINTN                         *Size
  )
{
  EFI_STATUS                    Status;
  EFI_HANDLE                    *HandleBuffer;
  UINTN                         HandleCount;
  UINTN                         IndexFv;
  UINTN                         IndexFile;
  UINTN                         Key;
  EFI_GUID                      NameGuid;
  EFI_FV_FILE_ATTRIBUTES        Attributes;
  EFI_FIRMWARE_VOLUME2_PROTOCOL *Fv;

  //
  // Locate all available FVs.
  //
  HandleBuffer = NULL;
  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiFirmwareVolume2ProtocolGuid,
                  NULL,
                  &HandleCount,
                  &HandleBuffer
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  //
  // Go through FVs one by one to find the required section data.
  //
  for (IndexFv = 0; IndexFv < HandleCount; IndexFv++) {
    Status = gBS->HandleProtocol (
                    HandleBuffer[IndexFv],
                    &gEfiFirmwareVolume2ProtocolGuid,
                    (VOID **)&Fv
                    );
    if (EFI_ERROR (Status)) {
      continue;
    }

    //
    // Use Firmware Volume 2 Protocol to search for a file of type FileType in all FVs.
    //
    IndexFile = FileInstance + 1;
    Key = 0;
    do {
      Status = Fv->GetNextFile (Fv, &Key, &FileType, &NameGuid, &Attributes, Size);
      if (EFI_ERROR (Status)) {
        break;
      }
      IndexFile --;
    } while (IndexFile > 0);

    //
    // Fv File with the required FV file type is found.
    // Search the section file in the found FV file.
    //
    if (IndexFile == 0) {
      Status = InternalGetSectionFromFv (
                 HandleBuffer[IndexFv], 
                 &NameGuid,
                 SectionType,
                 SectionInstance,
                 Buffer,
                 Size
                 );

      if (!EFI_ERROR (Status)) {
        goto Done;
      }
    }
  }

  //
  // The required FFS section file is not found. 
  //
  if (IndexFv == HandleCount) {
    Status = EFI_NOT_FOUND;
  }

Done:
  if (HandleBuffer != NULL) {  
    FreePool(HandleBuffer);
  }

  return Status;
}
Ejemplo n.º 4
0
/**
  Searches all the availables firmware volumes and returns the first matching FFS section. 

  This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid.  
  The order that the firmware volumes is searched is not deterministic. For each FFS file found a search 
  is made for FFS sections of type SectionType. If the FFS file contains at least SectionInstance instances 
  of the FFS section specified by SectionType, then the SectionInstance instance is returned in Buffer. 
  Buffer is allocated using AllocatePool(), and the size of the allocated buffer is returned in Size. 
  It is the caller's responsibility to use FreePool() to free the allocated buffer.  
  See EFI_FIRMWARE_VOLUME2_PROTOCOL.ReadSection() for details on how sections 
  are retrieved from an FFS file based on SectionType and SectionInstance.

  If SectionType is EFI_SECTION_TE, and the search with an FFS file fails, 
  the search will be retried with a section type of EFI_SECTION_PE32.
  This function must be called with a TPL <= TPL_NOTIFY.

  If NameGuid is NULL, then ASSERT().
  If Buffer is NULL, then ASSERT().
  If Size is NULL, then ASSERT().


  @param  NameGuid             A pointer to to the FFS filename GUID to search for  
                               within any of the firmware volumes in the platform. 
  @param  SectionType          Indicates the FFS section type to search for within 
                               the FFS file specified by NameGuid.
  @param  SectionInstance      Indicates which section instance within the FFS file 
                               specified by NameGuid to retrieve.
  @param  Buffer               On output, a pointer to a callee allocated buffer 
                               containing the FFS file section that was found.  
                               Is it the caller's responsibility to free this buffer 
                               using FreePool().
  @param  Size                 On output, a pointer to the size, in bytes, of Buffer.

  @retval  EFI_SUCCESS          The specified FFS section was returned.
  @retval  EFI_NOT_FOUND        The specified FFS section could not be found.
  @retval  EFI_OUT_OF_RESOURCES There are not enough resources available to 
                                retrieve the matching FFS section.
  @retval  EFI_DEVICE_ERROR     The FFS section could not be retrieves due to a 
                                device error.
  @retval  EFI_ACCESS_DENIED    The FFS section could not be retrieves because the 
                                firmware volume that 
                                contains the matching FFS section does not allow reads.
**/
EFI_STATUS
EFIAPI
GetSectionFromAnyFv  (
  IN CONST  EFI_GUID           *NameGuid,
  IN        EFI_SECTION_TYPE   SectionType,
  IN        UINTN              SectionInstance,
  OUT       VOID               **Buffer,
  OUT       UINTN              *Size
  )
{
  EFI_STATUS                    Status;
  EFI_HANDLE                    *HandleBuffer;
  UINTN                         HandleCount;
  UINTN                         Index;
  EFI_HANDLE                    FvHandle;

  //
  // Search the FV that contain the caller's FFS first.
  // FV builder can choose to build FFS into the this FV
  // so that this implementation of GetSectionFromAnyFv
  // will locate the FFS faster.
  //
  FvHandle = InternalImageHandleToFvHandle (gImageHandle);
  Status = InternalGetSectionFromFv (
             FvHandle,
             NameGuid,
             SectionType,
             SectionInstance,
             Buffer,
             Size
             );
  if (!EFI_ERROR (Status)) {
    return EFI_SUCCESS;
  }

  HandleBuffer = NULL;
  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiFirmwareVolume2ProtocolGuid,
                  NULL,
                  &HandleCount,
                  &HandleBuffer
                  );
  if (EFI_ERROR (Status)) {
    goto Done;
  }

  for (Index = 0; Index < HandleCount; Index++) {
    //
    // Skip the FV that contain the caller's FFS
    //
    if (HandleBuffer[Index] != FvHandle) {
      Status = InternalGetSectionFromFv (
                 HandleBuffer[Index], 
                 NameGuid, 
                 SectionType, 
                 SectionInstance,
                 Buffer, 
                 Size
                 );

      if (!EFI_ERROR (Status)) {
        goto Done;
      }
    }

  }

  if (Index == HandleCount) {
    Status = EFI_NOT_FOUND;
  }

Done:
  
  if (HandleBuffer != NULL) {  
    FreePool(HandleBuffer);
  }
  return Status;
  
}
Ejemplo n.º 5
0
/**
  Searches all the available firmware volumes and returns the file device path of first matching
  FFS section.

  This function searches all the firmware volumes for FFS files with an FFS filename specified by NameGuid.
  The order that the firmware volumes is searched is not deterministic. For each FFS file found a search
  is made for FFS sections of type SectionType.

  If SectionType is EFI_SECTION_TE, and the search with an FFS file fails,
  the search will be retried with a section type of EFI_SECTION_PE32.
  This function must be called with a TPL <= TPL_NOTIFY.

  If NameGuid is NULL, then ASSERT().

   @param  NameGuid             A pointer to to the FFS filename GUID to search for
                                within any of the firmware volumes in the platform.
   @param  SectionType          Indicates the FFS section type to search for within
                                the FFS file specified by NameGuid.
   @param  SectionInstance      Indicates which section instance within the FFS file
                                specified by NameGuid to retrieve.
   @param  FvFileDevicePath     Device path for the target FFS
                                file.

   @retval  EFI_SUCCESS           The specified file device path of FFS section was returned.
   @retval  EFI_NOT_FOUND         The specified file device path of FFS section could not be found.
   @retval  EFI_DEVICE_ERROR      The FFS section could not be retrieves due to a
                                  device error.
   @retval  EFI_ACCESS_DENIED     The FFS section could not be retrieves because the
                                  firmware volume that contains the matching FFS section does not
                                  allow reads.
   @retval  EFI_INVALID_PARAMETER FvFileDevicePath is NULL.

**/
EFI_STATUS
EFIAPI
GetFileDevicePathFromAnyFv (
  IN CONST  EFI_GUID                  *NameGuid,
  IN        EFI_SECTION_TYPE          SectionType,
  IN        UINTN                     SectionInstance,
  OUT       EFI_DEVICE_PATH_PROTOCOL  **FvFileDevicePath
  )
{
  EFI_STATUS                        Status;
  EFI_HANDLE                        *HandleBuffer;
  UINTN                             HandleCount;
  UINTN                             Index;
  EFI_HANDLE                        FvHandle;
  EFI_DEVICE_PATH_PROTOCOL          *FvDevicePath;
  MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *TempFvFileDevicePath;
  VOID                              *Buffer;
  UINTN                             Size;

  if (FvFileDevicePath == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  HandleBuffer         = NULL;
  FvDevicePath         = NULL;
  TempFvFileDevicePath = NULL;
  Buffer               = NULL;
  Size                 = 0;

  //
  // Search the FV that contain the caller's FFS first.
  // FV builder can choose to build FFS into the this FV
  // so that this implementation of GetSectionFromAnyFv
  // will locate the FFS faster.
  //
  FvHandle = InternalImageHandleToFvHandle (gImageHandle);
  Status = InternalGetSectionFromFv (
             FvHandle,
             NameGuid,
             SectionType,
             SectionInstance,
             &Buffer,
             &Size
             );
  if (!EFI_ERROR (Status)) {
    goto Done;
  }

  Status = gBS->LocateHandleBuffer (
                  ByProtocol,
                  &gEfiFirmwareVolume2ProtocolGuid,
                  NULL,
                  &HandleCount,
                  &HandleBuffer
                  );
  if (EFI_ERROR (Status)) {
    goto Done;
  }

  for (Index = 0; Index < HandleCount; Index++) {
    //
    // Skip the FV that contain the caller's FFS
    //
    if (HandleBuffer[Index] != FvHandle) {
      Status = InternalGetSectionFromFv (
                 HandleBuffer[Index],
                 NameGuid,
                 SectionType,
                 SectionInstance,
                 &Buffer,
                 &Size
                 );

      if (!EFI_ERROR (Status)) {
        //
        // Update FvHandle to the current handle.
        //
        FvHandle = HandleBuffer[Index];
        goto Done;
      }
    }
  }

  if (Index == HandleCount) {
    Status = EFI_NOT_FOUND;
  }

Done:
  if (Status == EFI_SUCCESS) {
    //
    // Build a device path to the file in the FV to pass into gBS->LoadImage
    //
    Status = gBS->HandleProtocol (FvHandle, &gEfiDevicePathProtocolGuid, (VOID **)&FvDevicePath);
    if (EFI_ERROR (Status)) {
      *FvFileDevicePath = NULL;
    } else {
      TempFvFileDevicePath = AllocateZeroPool (sizeof (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH) + END_DEVICE_PATH_LENGTH);
      if (TempFvFileDevicePath == NULL) {
        *FvFileDevicePath = NULL;
        return EFI_OUT_OF_RESOURCES;
      }
      EfiInitializeFwVolDevicepathNode ((MEDIA_FW_VOL_FILEPATH_DEVICE_PATH*)TempFvFileDevicePath, NameGuid);
      SetDevicePathEndNode (NextDevicePathNode (TempFvFileDevicePath));
      *FvFileDevicePath = AppendDevicePath (
                            FvDevicePath,
                            (EFI_DEVICE_PATH_PROTOCOL *)TempFvFileDevicePath
                            );
      FreePool (TempFvFileDevicePath);
    }
  }

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

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

  return Status;
}