MdePkg/Library/BasePeCoffLib/x64/PeCoffLoaderEx.c

   1 /** @file
   2   x64 Specific relocation fixups.
   3
   4   Copyright (c) 2006, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13   Module Name:  PeCoffLoaderEx.c
  14
  15 **/
  16
  17
  18
  19
  20 /**
  21   Performs an x64 specific relocation fixup.
  22
  23   @param  Reloc Pointer to the relocation record
  24   @param  Fixup Pointer to the address to fix up
  25   @param  FixupData Pointer to a buffer to log the fixups
  26   @param  Adjust The offset to adjust the fixup
  27
  28 **/
  29 RETURN_STATUS
  30 PeCoffLoaderRelocateImageEx (
  31   IN UINT16      *Reloc,
  32   IN OUT CHAR8   *Fixup,
  33   IN OUT CHAR8   **FixupData,
  34   IN UINT64      Adjust
  35   )
  36 {
  37   UINT64      *F64;
  38
  39   switch ((*Reloc) >> 12) {
  40
  41     case EFI_IMAGE_REL_BASED_DIR64:
  42       F64 = (UINT64 *) Fixup;
  43       *F64 = *F64 + (UINT64) Adjust;
  44       if (*FixupData != NULL) {
  45         *FixupData = ALIGN_POINTER(*FixupData, sizeof(UINT64));
  46         *(UINT64 *)(*FixupData) = *F64;
  47         *FixupData = *FixupData + sizeof(UINT64);
  48       }
  49       break;
  50
  51     default:
  52       return RETURN_UNSUPPORTED;
  53   }
  54
  55   return RETURN_SUCCESS;
  56 }