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/UefiBootServicesTableLib/UefiBootServicesTableLib.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.c')
| -rw-r--r-- | roms/edk2/MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.c b/roms/edk2/MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.c new file mode 100644 index 000000000..4fb6bc8fb --- /dev/null +++ b/roms/edk2/MdePkg/Library/UefiBootServicesTableLib/UefiBootServicesTableLib.c @@ -0,0 +1,60 @@ +/** @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;
+}
|