diff options
| author | Jordan Justen <jordan.l.justen@intel.com> | 2016-05-30 18:51:54 -0700 |
|---|---|---|
| committer | Liming Gao <liming.gao@intel.com> | 2016-06-28 09:48:38 +0800 |
| commit | 5135ae9bd26767083a8bb6fb1ece0a84eeb57c65 (patch) | |
| tree | 1fb075df8fb88d26d318f06454b2d48b31ce777c /MdePkg/Library/BaseLib/Ia32/WriteDr4.nasm | |
| parent | 058ffecb1274bcd1336bcf5ae016e30482d14c42 (diff) | |
MdePkg BaseLib: Convert Ia32/WriteDr4.asm to NASM
The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
Ia32/WriteDr4.asm to Ia32/WriteDr4.nasm
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/WriteDr4.nasm')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/WriteDr4.nasm | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/WriteDr4.nasm b/MdePkg/Library/BaseLib/Ia32/WriteDr4.nasm new file mode 100644 index 0000000000..a1b143a2e6 --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/WriteDr4.nasm @@ -0,0 +1,45 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution. The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+; Module Name:
+;
+; WriteDr4.Asm
+;
+; Abstract:
+;
+; AsmWriteDr4 function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; UINTN
+; EFIAPI
+; AsmWriteDr4 (
+; IN UINTN Value
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(AsmWriteDr4)
+ASM_PFX(AsmWriteDr4):
+ mov eax, [esp + 4]
+ ;
+ ; DR4 is alias to DR6 only if DE (in CR4) is cleared. Otherwise, writing to
+ ; this register will cause a #UD exception.
+ ;
+ ; MS assembler doesn't support this instruction since no one would use it
+ ; under normal circustances. Here opcode is used.
+ ;
+ DB 0xf, 0x23, 0xe0
+ ret
+
|