| /** @file | |
| AsmReadDr4 function | |
| Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR> | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| /** | |
| Reads the current value of Debug Register 4 (DR4). | |
| Reads and returns the current value of DR4. This function is only available | |
| on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
| x64. | |
| @return The value of Debug Register 4 (DR4). | |
| **/ | |
| UINTN | |
| EFIAPI | |
| AsmReadDr4 ( | |
| VOID | |
| ) | |
| { | |
| __asm { | |
| _emit 0x0f | |
| _emit 0x21 | |
| _emit 0xe0 | |
| } | |
| } |