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/** @file
Firmware volume helper interfaces.
Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
Copyright (c) 2016 - 2021, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "StandaloneMmCore.h"
#include <Library/FvLib.h>
#include <Library/ExtractGuidedSectionLib.h>
//
// List of file types supported by dispatcher
//
EFI_FV_FILETYPE mMmFileTypes[] = {
EFI_FV_FILETYPE_MM,
0xE, // EFI_FV_FILETYPE_MM_STANDALONE,
//
// Note: DXE core will process the FV image file, so skip it in MM core
// EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE
//
};
EFI_STATUS
MmAddToDriverList (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader,
IN VOID *Pe32Data,
IN UINTN Pe32DataSize,
IN VOID *Depex,
IN UINTN DepexSize,
IN EFI_GUID *DriverName
);
BOOLEAN
FvHasBeenProcessed (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader
);
VOID
FvIsBeingProcessed (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader
);
/**
Given the pointer to the Firmware Volume Header find the
MM driver and return its PE32 image.
@param [in] FwVolHeader Pointer to memory mapped FV
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_NOT_FOUND Could not find section data.
@retval EFI_OUT_OF_RESOURCES Out of resources.
@retval EFI_VOLUME_CORRUPTED Firmware volume is corrupted.
@retval EFI_UNSUPPORTED Operation not supported.
**/
EFI_STATUS
MmCoreFfsFindMmDriver (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader
)
{
EFI_STATUS Status;
EFI_STATUS DepexStatus;
EFI_FFS_FILE_HEADER *FileHeader;
EFI_FV_FILETYPE FileType;
VOID *Pe32Data;
UINTN Pe32DataSize;
VOID *Depex;
UINTN DepexSize;
UINTN Index;
EFI_COMMON_SECTION_HEADER *Section;
VOID *SectionData;
UINTN SectionDataSize;
UINT32 DstBufferSize;
VOID *ScratchBuffer;
UINT32 ScratchBufferSize;
VOID *DstBuffer;
UINT16 SectionAttribute;
UINT32 AuthenticationStatus;
EFI_FIRMWARE_VOLUME_HEADER *InnerFvHeader;
DEBUG ((DEBUG_INFO, "MmCoreFfsFindMmDriver - 0x%x\n", FwVolHeader));
if (FvHasBeenProcessed (FwVolHeader)) {
return EFI_SUCCESS;
}
FvIsBeingProcessed (FwVolHeader);
//
// First check for encapsulated compressed firmware volumes
//
FileHeader = NULL;
do {
Status = FfsFindNextFile (
EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE,
FwVolHeader,
&FileHeader
);
if (EFI_ERROR (Status)) {
break;
}
Status = FfsFindSectionData (
EFI_SECTION_GUID_DEFINED,
FileHeader,
&SectionData,
&SectionDataSize
);
if (EFI_ERROR (Status)) {
break;
}
Section = (EFI_COMMON_SECTION_HEADER *)(FileHeader + 1);
Status = ExtractGuidedSectionGetInfo (
Section,
&DstBufferSize,
&ScratchBufferSize,
&SectionAttribute
);
if (EFI_ERROR (Status)) {
break;
}
//
// Allocate scratch buffer
//
ScratchBuffer = (VOID *)(UINTN)AllocatePages (EFI_SIZE_TO_PAGES (ScratchBufferSize));
if (ScratchBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Allocate destination buffer, extra one page for adjustment
//
DstBuffer = (VOID *)(UINTN)AllocatePages (EFI_SIZE_TO_PAGES (DstBufferSize));
if (DstBuffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
//
// Call decompress function
//
Status = ExtractGuidedSectionDecode (
Section,
&DstBuffer,
ScratchBuffer,
&AuthenticationStatus
);
FreePages (ScratchBuffer, EFI_SIZE_TO_PAGES (ScratchBufferSize));
if (EFI_ERROR (Status)) {
goto FreeDstBuffer;
}
DEBUG ((
DEBUG_INFO,
"Processing compressed firmware volume (AuthenticationStatus == %x)\n",
AuthenticationStatus
));
Status = FindFfsSectionInSections (
DstBuffer,
DstBufferSize,
EFI_SECTION_FIRMWARE_VOLUME_IMAGE,
&Section
);
if (EFI_ERROR (Status)) {
goto FreeDstBuffer;
}
InnerFvHeader = (VOID *)(Section + 1);
Status = MmCoreFfsFindMmDriver (InnerFvHeader);
if (EFI_ERROR (Status)) {
goto FreeDstBuffer;
}
} while (TRUE);
for (Index = 0; Index < sizeof (mMmFileTypes) / sizeof (mMmFileTypes[0]); Index++) {
DEBUG ((DEBUG_INFO, "Check MmFileTypes - 0x%x\n", mMmFileTypes[Index]));
FileType = mMmFileTypes[Index];
FileHeader = NULL;
do {
Status = FfsFindNextFile (FileType, FwVolHeader, &FileHeader);
if (!EFI_ERROR (Status)) {
Status = FfsFindSectionData (EFI_SECTION_PE32, FileHeader, &Pe32Data, &Pe32DataSize);
DEBUG ((DEBUG_INFO, "Find PE data - 0x%x\n", Pe32Data));
DepexStatus = FfsFindSectionData (EFI_SECTION_MM_DEPEX, FileHeader, &Depex, &DepexSize);
if (!EFI_ERROR (DepexStatus)) {
MmAddToDriverList (FwVolHeader, Pe32Data, Pe32DataSize, Depex, DepexSize, &FileHeader->Name);
}
}
} while (!EFI_ERROR (Status));
}
return EFI_SUCCESS;
FreeDstBuffer:
FreePages (DstBuffer, EFI_SIZE_TO_PAGES (DstBufferSize));
return Status;
}
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