EdkModulePkg/Core/DxeIplPeim/Ipf/ImageRead.c

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   ImageRead.c
  15
  16 Abstract:
  17
  18 --*/
  19
  20 #include <DxeIpl.h>
  21
  22 EFI_STATUS
  23 PeiImageRead (
  24   IN     VOID    *FileHandle,
  25   IN     UINTN   FileOffset,
  26   IN OUT UINTN   *ReadSize,
  27   OUT    VOID    *Buffer
  28   )
  29 /*++
  30
  31 Routine Description:
  32
  33   Support routine for the PE/COFF Loader that reads a buffer from a PE/COFF file
  34
  35 Arguments:
  36
  37   FileHandle - The handle to the PE/COFF file
  38
  39   FileOffset - The offset, in bytes, into the file to read
  40
  41   ReadSize   - The number of bytes to read from the file starting at FileOffset
  42
  43   Buffer     - A pointer to the buffer to read the data into.
  44
  45 Returns:
  46
  47   EFI_SUCCESS - ReadSize bytes of data were read into Buffer from the PE/COFF file starting at FileOffset
  48
  49 --*/
  50 {
  51   CHAR8 *Destination8;
  52   CHAR8 *Source8;
  53   UINTN Length;
  54
  55   Destination8  = Buffer;
  56   Source8       = (CHAR8 *) ((UINTN) FileHandle + FileOffset);
  57   Length        = *ReadSize;
  58   while (Length--) {
  59     *(Destination8++) = *(Source8++);
  60   }
  61
  62   return EFI_SUCCESS;
  63 }
  64
  65 EFI_STATUS
  66 GetImageReadFunction (
  67   IN      PE_COFF_LOADER_IMAGE_CONTEXT  *ImageContext
  68   )
  69 {
  70   ImageContext->ImageRead = PeiImageRead;
  71   return EFI_SUCCESS;
  72 }