MdePkg/Library/BaseLib/Ia32/VmgExit.nasm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
   4 ; SPDX-License-Identifier: BSD-2-Clause-Patent
   5 ;
   6 ; Module Name:
   7 ;
   8 ;   VmgExit.Asm
   9 ;
  10 ; Abstract:
  11 ;
  12 ;   AsmVmgExit function
  13 ;
  14 ; Notes:
  15 ;
  16 ;------------------------------------------------------------------------------
  17
  18     SECTION .text
  19
  20 ;------------------------------------------------------------------------------
  21 ; VOID
  22 ; EFIAPI
  23 ; AsmVmgExit (
  24 ;   VOID
  25 ;   );
  26 ;------------------------------------------------------------------------------
  27 global ASM_PFX(AsmVmgExit)
  28 ASM_PFX(AsmVmgExit):
  29 ;
  30 ; NASM doesn't support the vmmcall instruction in 32-bit mode and NASM versions
  31 ; before 2.12 cannot translate the 64-bit "rep vmmcall" instruction into elf32
  32 ; format. Given that VMGEXIT does not make sense on IA32, provide a stub
  33 ; implementation that is identical to CpuBreakpoint(). In practice, AsmVmgExit()
  34 ; should never be called on IA32.
  35 ;
  36     int  3
  37     ret
  38