MdeModulePkg/Universal/EbcDxe/Ia32/EbcLowLevel.S

   1 #/** @file
   2 #
   3 #    Low level IA32 specific EBC support routines.
   4 #
   5 #  Copyright (c) 2007 - 2011, Intel Corporation. All rights reserved.<BR>
   6 #  This program and the accompanying materials
   7 #  are licensed and made available under the terms and conditions of the BSD License
   8 #  which accompanies this distribution.  The full text of the license may be found at
   9 #  http://opensource.org/licenses/bsd-license.php
  10 #
  11 #  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 #  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 #
  14 #**/
  15
  16 ASM_GLOBAL ASM_PFX(CopyMem)
  17 ASM_GLOBAL ASM_PFX(EbcInterpret)
  18 ASM_GLOBAL ASM_PFX(ExecuteEbcImageEntryPoint)
  19
  20 ASM_GLOBAL ASM_PFX(EbcLLCALLEXNative)
  21 ASM_PFX(EbcLLCALLEXNative):
  22          push   %ebp
  23          push   %ebx
  24          mov    %esp,%ebp
  25          mov    0xc(%esp),%ecx
  26          mov    0x14(%esp),%eax
  27          mov    0x10(%esp),%edx
  28          sub    %edx,%eax
  29          sub    %eax,%esp
  30          mov    %esp,%ebx
  31          push   %ecx
  32          push   %eax
  33          push   %edx
  34          push   %ebx
  35          call   ASM_PFX(CopyMem)
  36          pop    %eax
  37          pop    %eax
  38          pop    %eax
  39          pop    %ecx
  40          call   *%ecx
  41          mov    %ebp,%esp
  42          mov    %ebp,%esp
  43          pop    %ebx
  44          pop    %ebp
  45          ret
  46
  47 ASM_GLOBAL ASM_PFX(EbcLLEbcInterpret)
  48 ASM_PFX(EbcLLEbcInterpret):
  49     # Construct new stack
  50     push %ebp
  51     mov  %esp, %ebp
  52     push %esi
  53     push %edi
  54     sub  $0x40, %esp
  55     push %eax
  56     mov  %ebp, %esi
  57     add  $0x8, %esi
  58     mov  %esp, %edi
  59     add  $0x4, %edi
  60     mov  $0x10, %ecx
  61     rep  movsd
  62
  63     # call C-code
  64     call ASM_PFX(EbcInterpret)
  65     add  $0x44, %esp
  66     pop  %edi
  67     pop  %esi
  68     pop  %ebp
  69     ret
  70
  71 ASM_GLOBAL ASM_PFX(EbcLLExecuteEbcImageEntryPoint)
  72 ASM_PFX(EbcLLExecuteEbcImageEntryPoint):
  73     # Construct new stack
  74     mov  %eax, -0xC(%esp)
  75     mov  0x4(%esp), %eax
  76     mov  %eax, -0x8(%esp)
  77     mov  0x8(%esp), %eax
  78     mov  %eax, -0x4(%esp)
  79     # call C-code
  80     sub  $0xC, %esp
  81     call ASM_PFX(ExecuteEbcImageEntryPoint)
  82     add  $0xC, %esp
  83     ret