EdkCompatibilityPkg/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/ReadDr5.asm

   1 ; Copyright (c) 2004, Intel Corporation
   2 ; All rights reserved. This program and the accompanying materials
   3 ; are licensed and made available under the terms and conditions of the BSD License
   4 ; which accompanies this distribution.  The full text of the license may be found at
   5 ; http://opensource.org/licenses/bsd-license.php
   6 ;
   7 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
   8 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
   9 ;
  10 ; Module Name:
  11 ;
  12 ;   ReadDr5.Asm
  13 ;
  14 ; Abstract:
  15 ;
  16 ;   AsmReadDr5 function
  17 ;
  18 ; Notes:
  19 ;
  20 ;------------------------------------------------------------------------------
  21
  22     .code
  23
  24 ;------------------------------------------------------------------------------
  25 ; UINTN
  26 ; EFIAPI
  27 ; AsmReadDr5 (
  28 ;   VOID
  29 ;   );
  30 ;------------------------------------------------------------------------------
  31 AsmReadDr5  PROC
  32     ;
  33     ; There's no obvious reason to access this register, since it's aliased to
  34     ; DR7 when DE=0 or an exception generated when DE=1
  35     ;
  36     DB      0fh, 21h, 0e8h
  37     ret
  38 AsmReadDr5  ENDP
  39
  40     END