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      1 ; Copyright (c) 2004, Intel Corporation. All rights reserved.<BR>
      2 ; 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 ;   WriteDr4.Asm
     13 ;
     14 ; Abstract:
     15 ;
     16 ;   AsmWriteDr4 function
     17 ;
     18 ; Notes:
     19 ;
     20 ;------------------------------------------------------------------------------
     21 
     22     .code
     23 
     24 ;------------------------------------------------------------------------------
     25 ; UINTN
     26 ; EFIAPI
     27 ; AsmWriteDr4 (
     28 ;   IN UINTN Value
     29 ;   );
     30 ;------------------------------------------------------------------------------
     31 AsmWriteDr4 PROC
     32     ;
     33     ; There's no obvious reason to access this register, since it's aliased to
     34     ; DR6 when DE=0 or an exception generated when DE=1
     35     ;
     36     DB      0fh, 23h, 0e1h
     37     mov     rax, rcx
     38     ret
     39 AsmWriteDr4 ENDP
     40 
     41     END
     42