Load-module-at-fixed-address feature does not work in standalone MM core.
The patch removes the 2 dead functions and related global variables
that are related to the feature.
Signed-off-by: Ray Ni <ray...@intel.com>
Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
Cc: Sami Mujawar <sami.muja...@arm.com>
---
StandaloneMmPkg/Core/Dispatcher.c | 185 +-----------------------
StandaloneMmPkg/Core/StandaloneMmCore.h | 3 +-
2 files changed, 2 insertions(+), 186 deletions(-)
diff --git a/StandaloneMmPkg/Core/Dispatcher.c
b/StandaloneMmPkg/Core/Dispatcher.c
index 7b4a3c4c55..6d43e53851 100644
--- a/StandaloneMmPkg/Core/Dispatcher.c
+++ b/StandaloneMmPkg/Core/Dispatcher.c
@@ -29,7 +29,7 @@
Depex - Dependency Expresion.
Copyright (c) 2014, Hewlett-Packard Development Company, L.P.
- Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2009 - 2023, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016 - 2021, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -97,189 +97,6 @@ BOOLEAN gDispatcherRunning = FALSE;
//
BOOLEAN gRequestDispatch = FALSE;
-//
-// The global variable is defined for Loading modules at fixed address feature
to track the MM code
-// memory range usage. It is a bit mapped array in which every bit indicates
the correspoding
-// memory page available or not.
-//
-GLOBAL_REMOVE_IF_UNREFERENCED UINT64 *mMmCodeMemoryRangeUsageBitMap = NULL;
-
-/**
- To check memory usage bit map array to figure out if the memory range in
which the image will be loaded
- is available or not. If memory range is avaliable, the function will mark
the corresponding bits to 1
- which indicates the memory range is used. The function is only invoked when
load modules at fixed address
- feature is enabled.
-
- @param ImageBase The base addres the image will be loaded at.
- @param ImageSize The size of the image
-
- @retval EFI_SUCCESS The memory range the image will be loaded
in is available
- @retval EFI_NOT_FOUND The memory range the image will be loaded
in is not available
-**/
-EFI_STATUS
-CheckAndMarkFixLoadingMemoryUsageBitMap (
- IN EFI_PHYSICAL_ADDRESS ImageBase,
- IN UINTN ImageSize
- )
-{
- UINT32 MmCodePageNumber;
- UINT64 MmCodeSize;
- EFI_PHYSICAL_ADDRESS MmCodeBase;
- UINTN BaseOffsetPageNumber;
- UINTN TopOffsetPageNumber;
- UINTN Index;
-
- //
- // Build tool will calculate the smm code size and then patch the
PcdLoadFixAddressMmCodePageNumber
- //
- MmCodePageNumber = 0;
- MmCodeSize = EFI_PAGES_TO_SIZE (MmCodePageNumber);
- MmCodeBase = gLoadModuleAtFixAddressMmramBase;
-
- //
- // If the memory usage bit map is not initialized, do it. Every bit in the
array
- // indicate the status of the corresponding memory page, available or not
- //
- if (mMmCodeMemoryRangeUsageBitMap == NULL) {
- mMmCodeMemoryRangeUsageBitMap = AllocateZeroPool (((MmCodePageNumber / 64)
+ 1) * sizeof (UINT64));
- }
-
- //
- // If the Dxe code memory range is not allocated or the bit map array
allocation failed, return EFI_NOT_FOUND
- //
- if (mMmCodeMemoryRangeUsageBitMap == NULL) {
- return EFI_NOT_FOUND;
- }
-
- //
- // see if the memory range for loading the image is in the MM code range.
- //
- if ((MmCodeBase + MmCodeSize < ImageBase + ImageSize) || (MmCodeBase >
ImageBase)) {
- return EFI_NOT_FOUND;
- }
-
- //
- // Test if the memory is available or not.
- //
- BaseOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES ((UINT32)(ImageBase -
MmCodeBase));
- TopOffsetPageNumber = (UINTN)EFI_SIZE_TO_PAGES ((UINT32)(ImageBase +
ImageSize - MmCodeBase));
- for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index++) {
- if ((mMmCodeMemoryRangeUsageBitMap[Index / 64] & LShiftU64 (1, (Index %
64))) != 0) {
- //
- // This page is already used.
- //
- return EFI_NOT_FOUND;
- }
- }
-
- //
- // Being here means the memory range is available. So mark the bits for the
memory range
- //
- for (Index = BaseOffsetPageNumber; Index < TopOffsetPageNumber; Index++) {
- mMmCodeMemoryRangeUsageBitMap[Index / 64] |= LShiftU64 (1, (Index % 64));
- }
-
- return EFI_SUCCESS;
-}
-
-/**
- Get the fixed loading address from image header assigned by build tool. This
function only be called
- when Loading module at Fixed address feature enabled.
-
- @param ImageContext Pointer to the image context structure
that describes the PE/COFF
- image that needs to be examined by this
function.
- @retval EFI_SUCCESS An fixed loading address is assigned to
this image by build tools .
- @retval EFI_NOT_FOUND The image has no assigned fixed loadding
address.
-
-**/
-EFI_STATUS
-GetPeCoffImageFixLoadingAssignedAddress (
- IN OUT PE_COFF_LOADER_IMAGE_CONTEXT *ImageContext
- )
-{
- UINTN SectionHeaderOffset;
- EFI_STATUS Status;
- EFI_IMAGE_SECTION_HEADER SectionHeader;
- EFI_IMAGE_OPTIONAL_HEADER_UNION *ImgHdr;
- EFI_PHYSICAL_ADDRESS FixLoadingAddress;
- UINT16 Index;
- UINTN Size;
- UINT16 NumberOfSections;
- UINT64 ValueInSectionHeader;
-
- FixLoadingAddress = 0;
- Status = EFI_NOT_FOUND;
-
- //
- // Get PeHeader pointer
- //
- ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8
*)ImageContext->Handle + ImageContext->PeCoffHeaderOffset);
- SectionHeaderOffset = ImageContext->PeCoffHeaderOffset + sizeof (UINT32) +
sizeof (EFI_IMAGE_FILE_HEADER) +
- ImgHdr->Pe32.FileHeader.SizeOfOptionalHeader;
- NumberOfSections = ImgHdr->Pe32.FileHeader.NumberOfSections;
-
- //
- // Get base address from the first section header that doesn't point to code
section.
- //
- for (Index = 0; Index < NumberOfSections; Index++) {
- //
- // Read section header from file
- //
- Size = sizeof (EFI_IMAGE_SECTION_HEADER);
- Status = ImageContext->ImageRead (
- ImageContext->Handle,
- SectionHeaderOffset,
- &Size,
- &SectionHeader
- );
- if (EFI_ERROR (Status)) {
- return Status;
- }
-
- Status = EFI_NOT_FOUND;
-
- if ((SectionHeader.Characteristics & EFI_IMAGE_SCN_CNT_CODE) == 0) {
- //
- // Build tool will save the address in PointerToRelocations &
PointerToLineNumbers fields
- // in the first section header that doesn't point to code section in
image header. So there
- // is an assumption that when the feature is enabled, if a module with a
loading address
- // assigned by tools, the PointerToRelocations & PointerToLineNumbers
fields should not be
- // Zero, or else, these 2 fields should be set to Zero
- //
- ValueInSectionHeader = ReadUnaligned64 ((UINT64
*)&SectionHeader.PointerToRelocations);
- if (ValueInSectionHeader != 0) {
- //
- // Found first section header that doesn't point to code section in
which build tool saves the
- // offset to SMRAM base as image base in PointerToRelocations &
PointerToLineNumbers fields
- //
- FixLoadingAddress =
(EFI_PHYSICAL_ADDRESS)(gLoadModuleAtFixAddressMmramBase +
(INT64)ValueInSectionHeader);
- //
- // Check if the memory range is available.
- //
- Status = CheckAndMarkFixLoadingMemoryUsageBitMap (FixLoadingAddress,
(UINTN)(ImageContext->ImageSize + ImageContext->SectionAlignment));
- if (!EFI_ERROR (Status)) {
- //
- // The assigned address is valid. Return the specified loading
address
- //
- ImageContext->ImageAddress = FixLoadingAddress;
- }
- }
-
- break;
- }
-
- SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER);
- }
-
- DEBUG ((
- DEBUG_INFO|DEBUG_LOAD,
- "LOADING MODULE FIXED INFO: Loading module at fixed address %x, Status =
%r\n",
- FixLoadingAddress,
- Status
- ));
- return Status;
-}
-
/**
Loads an EFI image into SMRAM.
diff --git a/StandaloneMmPkg/Core/StandaloneMmCore.h
b/StandaloneMmPkg/Core/StandaloneMmCore.h
index da23b8dc3c..3d71bc84f8 100644
--- a/StandaloneMmPkg/Core/StandaloneMmCore.h
+++ b/StandaloneMmPkg/Core/StandaloneMmCore.h
@@ -2,7 +2,7 @@
The internal header file includes the common header files, defines
internal structure and functions used by MmCore module.
- Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2009 - 2023, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016 - 2021, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -177,7 +177,6 @@ typedef struct {
extern MM_CORE_PRIVATE_DATA *gMmCorePrivate;
extern EFI_MM_SYSTEM_TABLE gMmCoreMmst;
extern LIST_ENTRY gHandleList;
-extern EFI_PHYSICAL_ADDRESS gLoadModuleAtFixAddressMmramBase;
/**
Called to initialize the memory service.
--
2.39.1.windows.1
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