mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-24 11:45:27 +01:00
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/** @file
|
|
This library retrieve the EFI_BOOT_SERVICES pointer from EFI system table in
|
|
library's constructor.
|
|
|
|
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
|
|
#include <Uefi.h>
|
|
|
|
#include <Library/UefiBootServicesTableLib.h>
|
|
#include <Library/DebugLib.h>
|
|
|
|
EFI_HANDLE gImageHandle = NULL;
|
|
EFI_SYSTEM_TABLE *gST = NULL;
|
|
EFI_BOOT_SERVICES *gBS = NULL;
|
|
|
|
/**
|
|
The constructor function caches the pointer of Boot Services Table.
|
|
|
|
The constructor function caches the pointer of Boot Services Table through System Table.
|
|
It will ASSERT() if the pointer of System Table is NULL.
|
|
It will ASSERT() if the pointer of Boot Services Table is NULL.
|
|
It will always return EFI_SUCCESS.
|
|
|
|
@param ImageHandle The firmware allocated handle for the EFI image.
|
|
@param SystemTable A pointer to the EFI System Table.
|
|
|
|
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
UefiBootServicesTableLibConstructor (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
{
|
|
//
|
|
// Cache the Image Handle
|
|
//
|
|
gImageHandle = ImageHandle;
|
|
ASSERT (gImageHandle != NULL);
|
|
|
|
//
|
|
// Cache pointer to the EFI System Table
|
|
//
|
|
gST = SystemTable;
|
|
ASSERT (gST != NULL);
|
|
|
|
//
|
|
// Cache pointer to the EFI Boot Services Table
|
|
//
|
|
gBS = SystemTable->BootServices;
|
|
ASSERT (gBS != NULL);
|
|
|
|
return EFI_SUCCESS;
|
|
}
|