audk/MdePkg/Library/UefiApplicationEntryPoint/ApplicationEntryPoint.c

/** @file
  Entry point library instance to a UEFI application.

Copyright (c) 2007, Intel Corporation<BR>
All rights reserved. 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.

**/

#include <Uefi.h>
#include <Library/UefiApplicationEntryPoint.h>
#include <Library/UefiBootServicesTableLib.h>


/**
  Enrty point to UEFI application.

  @param  ImageHandle ImageHandle of the loaded driver.
  @param  SystemTable Pointer to the EFI System Table.

  @retval  EFI_SUCCESS One or more of the drivers returned a success code.
  @retval  !EFI_SUCESS The return status from the last driver entry point in the list.

**/
EFI_STATUS
EFIAPI
_ModuleEntryPoint (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS                 Status;

  if (_gUefiDriverRevision != 0) {
    //
    // Make sure that the EFI/UEFI spec revision of the platform is >= EFI/UEFI spec revision of the application.
    //
    if (SystemTable->Hdr.Revision < _gUefiDriverRevision) {
      return EFI_INCOMPATIBLE_VERSION;
    }
  }

  //
  // Call constructor for all libraries.
  //
  ProcessLibraryConstructorList (ImageHandle, SystemTable);

  //
  // Call the module's entry point
  //
  Status = ProcessModuleEntryPointList (ImageHandle, SystemTable);

  //
  // Process destructor for all libraries.
  //
  ProcessLibraryDestructorList (ImageHandle, SystemTable);

  //
  // Return the return status code from the driver entry point
  //
  return Status;
}

/**
  Invoke the destuctors of all libraries and call gBS->Exit
  to return control to firmware core.

  @param  Status Status returned by the application that is exiting.
  
**/
VOID
EFIAPI
Exit (
  IN EFI_STATUS  Status
  )

{
  ProcessLibraryDestructorList (gImageHandle, gST);

  gBS->Exit (gImageHandle, Status, 0, NULL);
}

/**
  Enrty point wrapper of UEFI Application.

  @param  ImageHandle ImageHandle of the loaded driver.
  @param  SystemTable Pointer to the EFI System Table.

  @retval  EFI_SUCCESS One or more of the drivers returned a success code.
  @retval  !EFI_SUCESS The return status from the last driver entry point in the list.

**/
EFI_STATUS
EFIAPI
EfiMain (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  return _ModuleEntryPoint (ImageHandle, SystemTable);
}