Using CopyMem service to replace the "while" loop for the memory copy

[mirror_edk2.git] / MdeModulePkg / Core / DxeIplPeim / Ipf / ImageRead.c

/*++\r
\r
Copyright (c) 2006, Intel Corporation\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
Module Name:\r
\r
  ImageRead.c\r
\r
Abstract:\r
\r
--*/\r
\r
#include "DxeIpl.h"\r
\r
EFI_STATUS\r
PeiImageRead (\r
  IN     VOID    *FileHandle,\r
  IN     UINTN   FileOffset,\r
  IN OUT UINTN   *ReadSize,\r
  OUT    VOID    *Buffer\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Support routine for the PE/COFF Loader that reads a buffer from a PE/COFF file\r
\r
Arguments:\r
\r
  FileHandle - The handle to the PE/COFF file\r
\r
  FileOffset - The offset, in bytes, into the file to read\r
\r
  ReadSize   - The number of bytes to read from the file starting at FileOffset\r
\r
  Buffer     - A pointer to the buffer to read the data into.\r
\r
Returns:\r
\r
  EFI_SUCCESS - ReadSize bytes of data were read into Buffer from the PE/COFF file starting at FileOffset\r
\r
--*/\r
{\r
  CHAR8 *Destination8;\r
  CHAR8 *Source8;\r
  volatile UINTN Length;\r
\r
  Destination8  = Buffer;\r
  Source8       = (CHAR8 *) ((UINTN) FileHandle + FileOffset);\r
  Length        = *ReadSize;\r
  CopyMem (Destination8, Source8, Length);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
GetImageReadFunction (\r
  IN      PE_COFF_LOADER_IMAGE_CONTEXT  *ImageContext\r
  )\r
{\r
  ImageContext->ImageRead = PeiImageRead;\r
  return EFI_SUCCESS;\r
}\r