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Enable "Load Module At fixed Address" feature in SMM Core

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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10166 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jchen20
2010-03-03 05:45:50 +00:00
parent de558d9dfe
commit 3c447c2760
7 changed files with 458 additions and 34 deletions
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186
MdeModulePkg/Core/PiSmmCore/PiSmmIpl.c
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@@ -24,6 +24,7 @@
#include <Guid/EventGroup.h>
#include <Guid/EventLegacyBios.h>
#include <Guid/LoadModuleAtFixedAddress.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
@@ -35,6 +36,7 @@
#include <Library/DxeServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Library/UefiRuntimeLib.h>
#include <Library/PcdLib.h>
#include "PiSmmCorePrivateData.h"
@@ -703,7 +705,101 @@ GetSectionInAnyFv (
return NULL;
}
/**
Get the fixed loadding 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 FixLoaddingAddress;
UINT16 Index;
UINTN Size;
UINT16 NumberOfSections;
EFI_PHYSICAL_ADDRESS SmramBase;
UINT64 SmmCodeSize;
UINT64 ValueInSectionHeader;
//
// Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber
//
SmmCodeSize = EFI_PAGES_TO_SIZE (PcdGet32(PcdLoadFixAddressSmmCodePageNumber));
FixLoaddingAddress = 0;
Status = EFI_NOT_FOUND;
SmramBase = mCurrentSmramRange->CpuStart;
//
// Get PeHeader pointer
//
ImgHdr = (EFI_IMAGE_OPTIONAL_HEADER_UNION *)((CHAR8* )ImageContext->Handle + ImageContext->PeCoffHeaderOffset);
SectionHeaderOffset = (UINTN)(
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 saves the offset to SMRAM base as image base in PointerToRelocations & PointerToLineNumbers fields in the
// first section header that doesn't point to code section in image header. And there is an assumption that when the
// feature is enabled, if a module is assigned a loading address by tools, PointerToRelocations & PointerToLineNumbers
// fields should NOT be Zero, or else, these 2 fileds 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 uild tool saves the
// offset to SMRAM base as image base in PointerToRelocations & PointerToLineNumbers fields
//
FixLoaddingAddress = (EFI_PHYSICAL_ADDRESS)(SmramBase + (INT64)ValueInSectionHeader);
if (SmramBase + SmmCodeSize > FixLoaddingAddress && SmramBase <= FixLoaddingAddress) {
//
// The assigned address is valid. Return the specified loadding address
//
ImageContext->ImageAddress = FixLoaddingAddress;
Status = EFI_SUCCESS;
}
}
break;
}
SectionHeaderOffset += sizeof (EFI_IMAGE_SECTION_HEADER);
}
DEBUG ((EFI_D_INFO|EFI_D_LOAD, "LOADING MODULE FIXED INFO: Loading module at fixed address %x, Status = %r \n", FixLoaddingAddress, Status));
return Status;
}
/**
Load the SMM Core image into SMRAM and executes the SMM Core from SMRAM.
@@ -749,23 +845,58 @@ ExecuteSmmCoreFromSmram (
if (EFI_ERROR (Status)) {
return Status;
}
//
// Allocate memory for the image being loaded from the EFI_SRAM_DESCRIPTOR
// specified by SmramRange
// if Loading module at Fixed Address feature is enabled, the SMM core driver will be loaded to
// the address assigned by build tool.
//
PageCount = (UINTN)EFI_SIZE_TO_PAGES(ImageContext.ImageSize + ImageContext.SectionAlignment);
if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {
//
// Get the fixed loading address assigned by Build tool
//
Status = GetPeCoffImageFixLoadingAssignedAddress (&ImageContext);
if (!EFI_ERROR (Status)) {
//
// Since the memory range to load SMM CORE will be cut out in SMM core, so no need to allocate and free this range
//
PageCount = 0;
} else {
DEBUG ((EFI_D_INFO, "LOADING MODULE FIXED ERROR: Loading module at fixed address at address failed\n"));
//
// Allocate memory for the image being loaded from the EFI_SRAM_DESCRIPTOR
// specified by SmramRange
//
PageCount = (UINTN)EFI_SIZE_TO_PAGES(ImageContext.ImageSize + ImageContext.SectionAlignment);
ASSERT ((SmramRange->PhysicalSize & EFI_PAGE_MASK) == 0);
ASSERT (SmramRange->PhysicalSize > EFI_PAGES_TO_SIZE (PageCount));
ASSERT ((SmramRange->PhysicalSize & EFI_PAGE_MASK) == 0);
ASSERT (SmramRange->PhysicalSize > EFI_PAGES_TO_SIZE (PageCount));
SmramRange->PhysicalSize -= EFI_PAGES_TO_SIZE (PageCount);
DestinationBuffer = SmramRange->CpuStart + SmramRange->PhysicalSize;
SmramRange->PhysicalSize -= EFI_PAGES_TO_SIZE (PageCount);
DestinationBuffer = SmramRange->CpuStart + SmramRange->PhysicalSize;
//
// Align buffer on section boundry
//
ImageContext.ImageAddress = DestinationBuffer;
//
// Align buffer on section boundry
//
ImageContext.ImageAddress = DestinationBuffer;
}
} else {
//
// Allocate memory for the image being loaded from the EFI_SRAM_DESCRIPTOR
// specified by SmramRange
//
PageCount = (UINTN)EFI_SIZE_TO_PAGES(ImageContext.ImageSize + ImageContext.SectionAlignment);
ASSERT ((SmramRange->PhysicalSize & EFI_PAGE_MASK) == 0);
ASSERT (SmramRange->PhysicalSize > EFI_PAGES_TO_SIZE (PageCount));
SmramRange->PhysicalSize -= EFI_PAGES_TO_SIZE (PageCount);
DestinationBuffer = SmramRange->CpuStart + SmramRange->PhysicalSize;
//
// Align buffer on section boundry
//
ImageContext.ImageAddress = DestinationBuffer;
}
ImageContext.ImageAddress += ImageContext.SectionAlignment - 1;
ImageContext.ImageAddress &= ~(ImageContext.SectionAlignment - 1);
@@ -847,6 +978,8 @@ SmmIplEntry (
EFI_SMM_RESERVED_SMRAM_REGION *SmramResRegion;
UINT64 MaxSize;
VOID *Registration;
UINT64 SmmCodeSize;
EFI_LOAD_FIXED_ADDRESS_CONFIGURATION_TABLE *LMFAConfigurationTable;
//
// Fill in the image handle of the SMM IPL so the SMM Core can use this as the
@@ -954,7 +1087,34 @@ SmmIplEntry (
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_WARN, "SMM IPL failed to set SMRAM window to EFI_MEMORY_WB\n"));
}
//
// if Loading module at Fixed Address feature is enabled, save the SMRAM base to Load
// Modules At Fixed Address Configuration Table.
//
if (PcdGet64(PcdLoadModuleAtFixAddressEnable) != 0) {
//
// Build tool will calculate the smm code size and then patch the PcdLoadFixAddressSmmCodePageNumber
//
SmmCodeSize = LShiftU64 (PcdGet32(PcdLoadFixAddressSmmCodePageNumber), EFI_PAGE_SHIFT);
//
// The SMRAM available memory is assumed to be larger than SmmCodeSize
//
ASSERT (mCurrentSmramRange->PhysicalSize > SmmCodeSize);
//
// Retrieve Load modules At fixed address configuration table and save the SMRAM base.
//
Status = EfiGetSystemConfigurationTable (
&gLoadFixedAddressConfigurationTableGuid,
(VOID **) &LMFAConfigurationTable
);
if (!EFI_ERROR (Status) && LMFAConfigurationTable != NULL) {
LMFAConfigurationTable->SmramBase = mCurrentSmramRange->CpuStart;
}
//
// Print the SMRAM base
//
DEBUG ((EFI_D_INFO, "LOADING MODULE FIXED INFO: TSEG BASE is %x. \n", LMFAConfigurationTable->SmramBase));
}
//
// Load SMM Core into SMRAM and execute it from SMRAM
//