1 /** @file 2 AsmReadDr1 function 3 4 Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> 5 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 **/ 14 15 16 17 18 /** 19 Reads the current value of Debug Register 1 (DR1). 20 21 Reads and returns the current value of DR1. This function is only available 22 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 23 x64. 24 25 @return The value of Debug Register 1 (DR1). 26 27 **/ 28 UINTN 29 EFIAPI 30 AsmReadDr1 ( 31 VOID 32 ) 33 { 34 __asm { 35 mov eax, dr1 36 } 37 } 38 39
