EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/Ia32/ReadIdt.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
   4 # This program and the accompanying materials
   5 # are licensed and made available under the terms and conditions of the BSD License
   6 # which accompanies this distribution.  The full text of the license may be found at
   7 # http://opensource.org/licenses/bsd-license.php
   8 #
   9 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 #
  12 # Module Name:
  13 #
  14 #   ReadIdtBase.Asm
  15 #
  16 # Abstract:
  17 #
  18 #   ReadIdtBase function
  19 #
  20 # Notes:
  21 #
  22 #include "EfiBind.h"
  23 #------------------------------------------------------------------------------
  24
  25     .586:
  26     #.MODEL flat,C
  27     .code:
  28
  29 .globl ASM_PFX(ReadIdtBasea)
  30 .globl ASM_PFX(ReadIdtLimita)
  31
  32 #------------------------------------------------------------------------------
  33 # UINTN
  34 # ReadIdtBase (
  35 #   void
  36 #   )
  37 #
  38 # Abstract: Returns physical address of IDTR
  39 #
  40 ASM_PFX(ReadIdtBasea):
  41    push   %ebp
  42    mov    %esp,%ebp
  43    add    $0xfffffff8,%esp
  44    sidtl  0xfffffffa(%ebp)
  45    mov    0xfffffffc(%ebp),%eax
  46    leave
  47    ret
  48
  49
  50
  51 #------------------------------------------------------------------------------
  52 # UINT16
  53 # ReadIdtLimit (
  54 #   void
  55 #   )
  56 #
  57 # Abstract: Returns Limit of IDTR
  58 #
  59 ASM_PFX(ReadIdtLimita):
  60    push   %ebp
  61    mov    %esp,%ebp
  62    add    $0xfffffff8,%esp
  63    sidtl  0xfffffffa(%ebp)
  64    mov    0xfffffffa(%ebp),%ax
  65    leave
  66    ret
  67
  68
  69