diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.c')
| -rw-r--r-- | roms/edk2/MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.c b/roms/edk2/MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.c new file mode 100644 index 000000000..e2e91939e --- /dev/null +++ b/roms/edk2/MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.c @@ -0,0 +1,43 @@ +/** @file
+ UEFI Runtime Services Table Library.
+
+ This library instance retrieve EFI_RUNTIME_SERVICES pointer from EFI system table
+ in library's constructor.
+
+ Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Uefi.h>
+#include <Library/DebugLib.h>
+
+EFI_RUNTIME_SERVICES *gRT = NULL;
+
+/**
+ The constructor function caches the pointer of Runtime Services Table.
+
+ The constructor function caches the pointer of Runtime Services Table.
+ It will ASSERT() if the pointer of Runtime 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
+UefiRuntimeServicesTableLibConstructor (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ //
+ // Cache pointer to the EFI Runtime Services Table
+ //
+ gRT = SystemTable->RuntimeServices;
+ ASSERT (gRT != NULL);
+ return EFI_SUCCESS;
+}
|