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/** @file
Entry point to a EFI/DXE driver.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h>
#include <Protocol/LoadedImage.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
/**
Unloads an image from memory.
This function is a callback that a driver registers to do cleanup
when the UnloadImage boot service function is called.
@param ImageHandle The handle to the image to unload.
@return Status returned by all unload().
**/
EFI_STATUS
EFIAPI
_DriverUnloadHandler (
EFI_HANDLE ImageHandle
)
{
EFI_STATUS Status;
//
// If an UnloadImage() handler is specified, then call it
//
Status = ProcessModuleUnloadList (ImageHandle);
//
// If the driver specific unload handler does not return an error, then call all of the
// library destructors. If the unload handler returned an error, then the driver can not be
// unloaded, and the library destructors should not be called
//
if (!EFI_ERROR (Status)) {
ProcessLibraryDestructorList (ImageHandle, gST);
}
//
// Return the status from the driver specific unload handler
//
return Status;
}
/**
The entry point of PE/COFF Image for a DXE Driver, DXE Runtime Driver, DXE SMM
Driver, or UEFI Driver.
This function is the entry point for a DXE Driver, DXE Runtime Driver, DXE SMM Driver,
or UEFI Driver. This function must call ProcessLibraryConstructorList() and
ProcessModuleEntryPointList(). If the return status from ProcessModuleEntryPointList()
is an error status, then ProcessLibraryDestructorList() must be called. The return
value from ProcessModuleEntryPointList() is returned. If _gDriverUnloadImageCount
is greater than zero, then an unload handler must be registered for this image
and the unload handler must invoke ProcessModuleUnloadList().
If _gUefiDriverRevision is not zero and SystemTable->Hdr.Revision is less than
_gUefiDriverRevison, then return EFI_INCOMPATIBLE_VERSION.
@param ImageHandle The image handle of the DXE Driver, DXE Runtime Driver,
DXE SMM Driver, or UEFI Driver.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The DXE Driver, DXE Runtime Driver, DXE SMM
Driver, or UEFI Driver exited normally.
@retval EFI_INCOMPATIBLE_VERSION _gUefiDriverRevision is greater than
SystemTable->Hdr.Revision.
@retval Other Return value from ProcessModuleEntryPointList().
**/
EFI_STATUS
EFIAPI
_ModuleEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_LOADED_IMAGE_PROTOCOL *LoadedImage;
if (_gUefiDriverRevision != 0) {
//
// Make sure that the EFI/UEFI spec revision of the platform is >= EFI/UEFI spec revision of the driver
//
if (SystemTable->Hdr.Revision < _gUefiDriverRevision) {
return EFI_INCOMPATIBLE_VERSION;
}
}
//
// Call constructor for all libraries
//
ProcessLibraryConstructorList (ImageHandle, SystemTable);
//
// Install unload handler...
//
if (_gDriverUnloadImageCount != 0) {
Status = gBS->HandleProtocol (
ImageHandle,
&gEfiLoadedImageProtocolGuid,
(VOID **)&LoadedImage
);
ASSERT_EFI_ERROR (Status);
LoadedImage->Unload = _DriverUnloadHandler;
}
//
// Call the driver entry point
//
Status = ProcessModuleEntryPointList (ImageHandle, SystemTable);
//
// If all of the drivers returned errors, then invoke all of the library destructors
//
if (EFI_ERROR (Status)) {
ProcessLibraryDestructorList (ImageHandle, SystemTable);
}
//
// Return the cummalative return status code from all of the driver entry points
//
return Status;
}
/**
Required by the EBC compiler and identical in functionality to _ModuleEntryPoint().
This function is required to call _ModuleEntryPoint() passing in ImageHandle,
and SystemTable.
@param ImageHandle The image handle of the DXE Driver, DXE Runtime Driver, DXE
SMM Driver, or UEFI Driver.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The DXE Driver, DXE Runtime Driver, DXE SMM
Driver, or UEFI Driver exited normally.
@retval EFI_INCOMPATIBLE_VERSION _gUefiDriverRevision is greater than
SystemTable->Hdr.Revision.
@retval Other Return value from ProcessModuleEntryPointList().
**/
EFI_STATUS
EFIAPI
EfiMain (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
return _ModuleEntryPoint (ImageHandle, SystemTable);
}
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