audk/MdeModulePkg/Core/DxeIplPeim/Ipf/ImageRead.c

/*++

Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

Module Name:

  ImageRead.c

Abstract:

--*/

#include "DxeIpl.h"

EFI_STATUS
PeiImageRead (
  IN     VOID    *FileHandle,
  IN     UINTN   FileOffset,
  IN OUT UINTN   *ReadSize,
  OUT    VOID    *Buffer
  )
/*++

Routine Description:

  Support routine for the PE/COFF Loader that reads a buffer from a PE/COFF file

Arguments:

  FileHandle - The handle to the PE/COFF file

  FileOffset - The offset, in bytes, into the file to read

  ReadSize   - The number of bytes to read from the file starting at FileOffset

  Buffer     - A pointer to the buffer to read the data into.

Returns:

  EFI_SUCCESS - ReadSize bytes of data were read into Buffer from the PE/COFF file starting at FileOffset

--*/
{
  CHAR8 *Destination8;
  CHAR8 *Source8;
  volatile UINTN Length;

  Destination8  = Buffer;
  Source8       = (CHAR8 *) ((UINTN) FileHandle + FileOffset);
  Length        = *ReadSize;
  CopyMem (Destination8, Source8, Length);

  return EFI_SUCCESS;
}

EFI_STATUS
GetImageReadFunction (
  IN      PE_COFF_LOADER_IMAGE_CONTEXT  *ImageContext
  )
{
  ImageContext->ImageRead = PeiImageRead;
  return EFI_SUCCESS;
}