EFI_STATUS
EFIAPI
LoadDxeCoreFromFfsFile (
IN EFI_PEI_FILE_HANDLE FileHandle,
IN UINTN StackSize
)
{
EFI_STATUS Status;
VOID *PeCoffImage;
EFI_PHYSICAL_ADDRESS ImageAddress;
UINT64 ImageSize;
EFI_PHYSICAL_ADDRESS EntryPoint;
VOID *BaseOfStack;
VOID *TopOfStack;
VOID *Hob;
EFI_FV_FILE_INFO FvFileInfo;
Status = FfsFindSectionData (EFI_SECTION_PE32, FileHandle, &PeCoffImage);
if (EFI_ERROR (Status)) {
return Status;
}
Status = LoadPeCoffImage (PeCoffImage, &ImageAddress, &ImageSize, &EntryPoint);
// For NT32 Debug Status = SecWinNtPeiLoadFile (PeCoffImage, &ImageAddress, &ImageSize, &EntryPoint);
ASSERT_EFI_ERROR (Status);
//
// Extract the DxeCore GUID file name.
//
Status = FfsGetFileInfo (FileHandle, &FvFileInfo);
ASSERT_EFI_ERROR (Status);
BuildModuleHob (&FvFileInfo.FileName, (EFI_PHYSICAL_ADDRESS)(UINTN)ImageAddress, EFI_SIZE_TO_PAGES ((UINT32) ImageSize) * EFI_PAGE_SIZE, EntryPoint);
DEBUG ((EFI_D_INFO | EFI_D_LOAD, "Loading DxeCore at 0x%10p EntryPoint=0x%10p\n", (VOID *)(UINTN)ImageAddress, (VOID *)(UINTN)EntryPoint));
Hob = GetHobList ();
if (StackSize == 0) {
// User the current stack
((DXE_CORE_ENTRY_POINT)(UINTN)EntryPoint) (Hob);
} else {
//
// Allocate 128KB for the Stack
//
BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (StackSize));
ASSERT (BaseOfStack != NULL);
//
// Compute the top of the stack we were allocated. Pre-allocate a UINTN
// for safety.
//
TopOfStack = (VOID *) ((UINTN) BaseOfStack + EFI_SIZE_TO_PAGES (StackSize) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);
TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
//
// Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.
//
UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN) BaseOfStack, StackSize);
SwitchStack (
(SWITCH_STACK_ENTRY_POINT)(UINTN)EntryPoint,
Hob,
NULL,
TopOfStack
);
}
// Should never get here as DXE Core does not return
DEBUG ((EFI_D_ERROR, "DxeCore returned\n"));
ASSERT (FALSE);
return EFI_DEVICE_ERROR;
}
EFI_STATUS
MmCoreFfsFindMmDriver (
IN EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader
)
/*++
Routine Description:
Given the pointer to the Firmware Volume Header find the
MM driver and return it's PE32 image.
Arguments:
FwVolHeader - Pointer to memory mapped FV
Returns:
other - Failure
--*/
{
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;
}
FvIsBeingProcesssed (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;
}
