85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/** @file -- VariablePolicyExtraInitRuntimeDxe.c
|
|
This file contains extra init and deinit routines that register and unregister
|
|
VariableAddressChange callbacks.
|
|
|
|
Copyright (c) Microsoft Corporation.
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
#include <Library/UefiRuntimeServicesTableLib.h>
|
|
|
|
extern EFI_GET_VARIABLE mGetVariableHelper;
|
|
extern UINT8 *mPolicyTable;
|
|
STATIC BOOLEAN mIsVirtualAddrConverted;
|
|
STATIC EFI_EVENT mVariablePolicyLibVirtualAddressChangeEvent = NULL;
|
|
|
|
/**
|
|
For the RuntimeDxe version of this lib, convert internal pointer addresses to virtual addresses.
|
|
|
|
@param[in] Event Event whose notification function is being invoked.
|
|
@param[in] Context The pointer to the notification function's context, which
|
|
is implementation-dependent.
|
|
**/
|
|
STATIC
|
|
VOID
|
|
EFIAPI
|
|
VariablePolicyLibVirtualAddressCallback (
|
|
IN EFI_EVENT Event,
|
|
IN VOID *Context
|
|
)
|
|
{
|
|
gRT->ConvertPointer (0, (VOID **)&mPolicyTable);
|
|
gRT->ConvertPointer (0, (VOID **)&mGetVariableHelper);
|
|
mIsVirtualAddrConverted = TRUE;
|
|
}
|
|
|
|
/**
|
|
An extra init hook that enables the RuntimeDxe library instance to
|
|
register VirtualAddress change callbacks. Among other things.
|
|
|
|
@retval EFI_SUCCESS Everything is good. Continue with init.
|
|
@retval Others Uh... don't continue.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
VariablePolicyExtraInit (
|
|
VOID
|
|
)
|
|
{
|
|
return gBS->CreateEventEx (
|
|
EVT_NOTIFY_SIGNAL,
|
|
TPL_NOTIFY,
|
|
VariablePolicyLibVirtualAddressCallback,
|
|
NULL,
|
|
&gEfiEventVirtualAddressChangeGuid,
|
|
&mVariablePolicyLibVirtualAddressChangeEvent
|
|
);
|
|
}
|
|
|
|
/**
|
|
An extra deinit hook that enables the RuntimeDxe library instance to
|
|
register VirtualAddress change callbacks. Among other things.
|
|
|
|
@retval EFI_SUCCESS Everything is good. Continue with deinit.
|
|
@retval Others Uh... don't continue.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
VariablePolicyExtraDeinit (
|
|
VOID
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
Status = EFI_SUCCESS;
|
|
if (mIsVirtualAddrConverted) {
|
|
Status = gBS->CloseEvent (mVariablePolicyLibVirtualAddressChangeEvent);
|
|
} else {
|
|
Status = EFI_SUCCESS;
|
|
}
|
|
|
|
return Status;
|
|
}
|