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system76-edk2/OvmfPkg/Sec/SecMain.c

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/** @file
Main SEC phase code. Transitions to PEI.
Copyright (c) 2008 - 2011, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include <PiPei.h>
#include <Library/PeimEntryPoint.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/PeiServicesLib.h>
#include <Library/PcdLib.h>
#include <Library/UefiCpuLib.h>
#include <Library/DebugAgentLib.h>
#include <Library/IoLib.h>
#include <Library/PeCoffLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/PeCoffExtraActionLib.h>
#include <Library/ExtractGuidedSectionLib.h>
#include <Ppi/TemporaryRamSupport.h>
#define SEC_IDT_ENTRY_COUNT 34
typedef struct _SEC_IDT_TABLE {
EFI_PEI_SERVICES *PeiService;
IA32_IDT_GATE_DESCRIPTOR IdtTable[SEC_IDT_ENTRY_COUNT];
} SEC_IDT_TABLE;
VOID
EFIAPI
SecStartupPhase2 (
IN VOID *Context
);
EFI_STATUS
EFIAPI
TemporaryRamMigration (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,
IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,
IN UINTN CopySize
);
//
//
//
EFI_PEI_TEMPORARY_RAM_SUPPORT_PPI mTemporaryRamSupportPpi = {
TemporaryRamMigration
};
EFI_PEI_PPI_DESCRIPTOR mPrivateDispatchTable[] = {
{
(EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
&gEfiTemporaryRamSupportPpiGuid,
&mTemporaryRamSupportPpi
},
};
//
// Template of an IDT entry pointing to 10:FFFFFFE4h.
//
IA32_IDT_GATE_DESCRIPTOR mIdtEntryTemplate = {
{ // Bits
0xffe4, // OffsetLow
0x10, // Selector
0x0, // Reserved_0
IA32_IDT_GATE_TYPE_INTERRUPT_32, // GateType
0xffff // OffsetHigh
}
};
/**
Locates the main boot firmware volume.
@param[in,out] BootFv On input, the base of the BootFv
On output, the decompressed main firmware volume
@retval EFI_SUCCESS The main firmware volume was located and decompressed
@retval EFI_NOT_FOUND The main firmware volume was not found
**/
EFI_STATUS
FindMainFv (
IN OUT EFI_FIRMWARE_VOLUME_HEADER **BootFv
)
{
EFI_FIRMWARE_VOLUME_HEADER *Fv;
UINTN Distance;
BOOLEAN Found;
ASSERT (((UINTN) *BootFv & EFI_PAGE_MASK) == 0);
Found = FALSE;
Fv = *BootFv;
Distance = (UINTN) (*BootFv)->FvLength;
do {
Fv = (EFI_FIRMWARE_VOLUME_HEADER*) ((UINT8*) Fv - EFI_PAGE_SIZE);
Distance += EFI_PAGE_SIZE;
if (Distance > SIZE_32MB) {
return EFI_NOT_FOUND;
}
if (Fv->Signature != EFI_FVH_SIGNATURE) {
continue;
}
if ((UINTN) Fv->FvLength > Distance) {
continue;
}
*BootFv = Fv;
return EFI_SUCCESS;
} while (TRUE);
}
/**
Locates a section within a series of sections
with the specified section type.
@param[in] Sections The sections to search
@param[in] SizeOfSections Total size of all sections
@param[in] SectionType The section type to locate
@param[out] FoundSection The FFS section if found
@retval EFI_SUCCESS The file and section was found
@retval EFI_NOT_FOUND The file and section was not found
@retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted
**/
EFI_STATUS
FindFfsSectionInSections (
IN VOID *Sections,
IN UINTN SizeOfSections,
IN EFI_SECTION_TYPE SectionType,
OUT EFI_COMMON_SECTION_HEADER **FoundSection
)
{
EFI_PHYSICAL_ADDRESS CurrentAddress;
UINT32 Size;
EFI_PHYSICAL_ADDRESS EndOfSections;
EFI_COMMON_SECTION_HEADER *Section;
EFI_PHYSICAL_ADDRESS EndOfSection;
//
// Loop through the FFS file sections within the PEI Core FFS file
//
EndOfSection = (EFI_PHYSICAL_ADDRESS)(UINTN) Sections;
EndOfSections = EndOfSection + SizeOfSections;
for (;;) {
if (EndOfSection == EndOfSections) {
break;
}
CurrentAddress = (EndOfSection + 3) & ~(3ULL);
if (CurrentAddress >= EndOfSections) {
return EFI_VOLUME_CORRUPTED;
}
Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress;
DEBUG ((EFI_D_INFO, "Section->Type: 0x%x\n", Section->Type));
Size = SECTION_SIZE (Section);
if (Size < sizeof (*Section)) {
return EFI_VOLUME_CORRUPTED;
}
EndOfSection = CurrentAddress + Size;
if (EndOfSection > EndOfSections) {
return EFI_VOLUME_CORRUPTED;
}
//
// Look for the requested section type
//
if (Section->Type == SectionType) {
*FoundSection = Section;
return EFI_SUCCESS;
}
DEBUG ((EFI_D_INFO, "Section->Type (0x%x) != SectionType (0x%x)\n", Section->Type, SectionType));
}
return EFI_NOT_FOUND;
}
/**
Locates a FFS file with the specified file type and a section
within that file with the specified section type.
@param[in] Fv The firmware volume to search
@param[in] FileType The file type to locate
@param[in] SectionType The section type to locate
@param[out] FoundSection The FFS section if found
@retval EFI_SUCCESS The file and section was found
@retval EFI_NOT_FOUND The file and section was not found
@retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted
**/
EFI_STATUS
EFIAPI
FindFfsFileAndSection (
IN EFI_FIRMWARE_VOLUME_HEADER *Fv,
IN EFI_FV_FILETYPE FileType,
IN EFI_SECTION_TYPE SectionType,
OUT EFI_COMMON_SECTION_HEADER **FoundSection
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS CurrentAddress;
EFI_PHYSICAL_ADDRESS EndOfFirmwareVolume;
EFI_FFS_FILE_HEADER *File;
UINT32 Size;
EFI_PHYSICAL_ADDRESS EndOfFile;
if (Fv->Signature != EFI_FVH_SIGNATURE) {
DEBUG ((EFI_D_INFO, "FV at %p does not have FV header signature\n", Fv));
return EFI_VOLUME_CORRUPTED;
}
CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) Fv;
EndOfFirmwareVolume = CurrentAddress + Fv->FvLength;
//
// Loop through the FFS files in the Boot Firmware Volume
//
for (EndOfFile = CurrentAddress + Fv->HeaderLength; ; ) {
CurrentAddress = (EndOfFile + 7) & ~(7ULL);
if (CurrentAddress > EndOfFirmwareVolume) {
return EFI_VOLUME_CORRUPTED;
}
File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;
Size = *(UINT32*) File->Size & 0xffffff;
if (Size < (sizeof (*File) + sizeof (EFI_COMMON_SECTION_HEADER))) {
return EFI_VOLUME_CORRUPTED;
}
DEBUG ((EFI_D_INFO, "File->Type: 0x%x\n", File->Type));
EndOfFile = CurrentAddress + Size;
if (EndOfFile > EndOfFirmwareVolume) {
return EFI_VOLUME_CORRUPTED;
}
//
// Look for the request file type
//
if (File->Type != FileType) {
DEBUG ((EFI_D_INFO, "File->Type (0x%x) != FileType (0x%x)\n", File->Type, FileType));
continue;
}
Status = FindFfsSectionInSections (
(VOID*) (File + 1),
(UINTN) EndOfFile - (UINTN) (File + 1),
SectionType,
FoundSection
);
if (!EFI_ERROR (Status) || (Status == EFI_VOLUME_CORRUPTED)) {
return Status;
}
}
}
/**
Locates the compressed main firmware volume and decompresses it.
@param[in,out] Fv On input, the firmware volume to search
On output, the decompressed main FV
@retval EFI_SUCCESS The file and section was found
@retval EFI_NOT_FOUND The file and section was not found
@retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted
**/
EFI_STATUS
EFIAPI
DecompressGuidedFv (
IN OUT EFI_FIRMWARE_VOLUME_HEADER **Fv
)
{
EFI_STATUS Status;
EFI_GUID_DEFINED_SECTION *Section;
UINT32 OutputBufferSize;
UINT32 ScratchBufferSize;
UINT16 SectionAttribute;
UINT32 AuthenticationStatus;
VOID *OutputBuffer;
VOID *ScratchBuffer;
EFI_FIRMWARE_VOLUME_IMAGE_SECTION *NewFvSection;
EFI_FIRMWARE_VOLUME_HEADER *NewFv;
NewFvSection = (EFI_FIRMWARE_VOLUME_IMAGE_SECTION*) NULL;
Status = FindFfsFileAndSection (
*Fv,
EFI_FV_FILETYPE_FIRMWARE_VOLUME_IMAGE,
EFI_SECTION_GUID_DEFINED,
(EFI_COMMON_SECTION_HEADER**) &Section
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Unable to find GUID defined section\n"));
return Status;
}
Status = ExtractGuidedSectionGetInfo (
Section,
&OutputBufferSize,
&ScratchBufferSize,
&SectionAttribute
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Unable to GetInfo for GUIDed section\n"));
return Status;
}
//PcdGet32 (PcdOvmfMemFvBase), PcdGet32 (PcdOvmfMemFvSize)
OutputBuffer = (VOID*) ((UINT8*)(UINTN) PcdGet32 (PcdOvmfMemFvBase) + SIZE_1MB);
ScratchBuffer = ALIGN_POINTER ((UINT8*) OutputBuffer + OutputBufferSize, SIZE_1MB);
Status = ExtractGuidedSectionDecode (
Section,
&OutputBuffer,
ScratchBuffer,
&AuthenticationStatus
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Error during GUID section decode\n"));
return Status;
}
Status = FindFfsSectionInSections (
OutputBuffer,
OutputBufferSize,
EFI_SECTION_FIRMWARE_VOLUME_IMAGE,
(EFI_COMMON_SECTION_HEADER**) &NewFvSection
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Unable to find FV image in extracted data\n"));
return Status;
}
NewFv = (EFI_FIRMWARE_VOLUME_HEADER*)(UINTN) PcdGet32 (PcdOvmfMemFvBase);
CopyMem (NewFv, (VOID*) (NewFvSection + 1), PcdGet32 (PcdOvmfMemFvSize));
if (NewFv->Signature != EFI_FVH_SIGNATURE) {
DEBUG ((EFI_D_ERROR, "Extracted FV at %p does not have FV header signature\n", NewFv));
CpuDeadLoop ();
return EFI_VOLUME_CORRUPTED;
}
*Fv = NewFv;
return EFI_SUCCESS;
}
/**
Locates the PEI Core entry point address
@param[in] Fv The firmware volume to search
@param[out] PeiCoreEntryPoint The entry point of the PEI Core image
@retval EFI_SUCCESS The file and section was found
@retval EFI_NOT_FOUND The file and section was not found
@retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted
**/
EFI_STATUS
EFIAPI
FindPeiCoreImageBaseInFv (
IN EFI_FIRMWARE_VOLUME_HEADER *Fv,
OUT EFI_PHYSICAL_ADDRESS *PeiCoreImageBase
)
{
EFI_STATUS Status;
EFI_COMMON_SECTION_HEADER *Section;
Status = FindFfsFileAndSection (
Fv,
EFI_FV_FILETYPE_PEI_CORE,
EFI_SECTION_PE32,
&Section
);
if (EFI_ERROR (Status)) {
Status = FindFfsFileAndSection (
Fv,
EFI_FV_FILETYPE_PEI_CORE,
EFI_SECTION_TE,
&Section
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Unable to find PEI Core image\n"));
return Status;
}
}
*PeiCoreImageBase = (EFI_PHYSICAL_ADDRESS)(UINTN)(Section + 1);
return EFI_SUCCESS;
}
/**
Locates the PEI Core entry point address
@param[in,out] Fv The firmware volume to search
@param[out] PeiCoreEntryPoint The entry point of the PEI Core image
@retval EFI_SUCCESS The file and section was found
@retval EFI_NOT_FOUND The file and section was not found
@retval EFI_VOLUME_CORRUPTED The firmware volume was corrupted
**/
VOID
EFIAPI
FindPeiCoreImageBase (
IN OUT EFI_FIRMWARE_VOLUME_HEADER **BootFv,
OUT EFI_PHYSICAL_ADDRESS *PeiCoreImageBase
)
{
*PeiCoreImageBase = 0;
FindMainFv (BootFv);
DecompressGuidedFv (BootFv);
FindPeiCoreImageBaseInFv (*BootFv, PeiCoreImageBase);
}
/**
Find core image base.
**/
EFI_STATUS
EFIAPI
FindImageBase (
IN EFI_FIRMWARE_VOLUME_HEADER *BootFirmwareVolumePtr,
OUT EFI_PHYSICAL_ADDRESS *SecCoreImageBase
)
{
EFI_PHYSICAL_ADDRESS CurrentAddress;
EFI_PHYSICAL_ADDRESS EndOfFirmwareVolume;
EFI_FFS_FILE_HEADER *File;
UINT32 Size;
EFI_PHYSICAL_ADDRESS EndOfFile;
EFI_COMMON_SECTION_HEADER *Section;
EFI_PHYSICAL_ADDRESS EndOfSection;
*SecCoreImageBase = 0;
CurrentAddress = (EFI_PHYSICAL_ADDRESS)(UINTN) BootFirmwareVolumePtr;
EndOfFirmwareVolume = CurrentAddress + BootFirmwareVolumePtr->FvLength;
//
// Loop through the FFS files in the Boot Firmware Volume
//
for (EndOfFile = CurrentAddress + BootFirmwareVolumePtr->HeaderLength; ; ) {
CurrentAddress = (EndOfFile + 7) & 0xfffffffffffffff8ULL;
if (CurrentAddress > EndOfFirmwareVolume) {
return EFI_NOT_FOUND;
}
File = (EFI_FFS_FILE_HEADER*)(UINTN) CurrentAddress;
Size = *(UINT32*) File->Size & 0xffffff;
if (Size < sizeof (*File)) {
return EFI_NOT_FOUND;
}
EndOfFile = CurrentAddress + Size;
if (EndOfFile > EndOfFirmwareVolume) {
return EFI_NOT_FOUND;
}
//
// Look for SEC Core
//
if (File->Type != EFI_FV_FILETYPE_SECURITY_CORE) {
continue;
}
//
// Loop through the FFS file sections within the FFS file
//
EndOfSection = (EFI_PHYSICAL_ADDRESS)(UINTN) (File + 1);
for (;;) {
CurrentAddress = (EndOfSection + 3) & 0xfffffffffffffffcULL;
Section = (EFI_COMMON_SECTION_HEADER*)(UINTN) CurrentAddress;
Size = *(UINT32*) Section->Size & 0xffffff;
if (Size < sizeof (*Section)) {
return EFI_NOT_FOUND;
}
EndOfSection = CurrentAddress + Size;
if (EndOfSection > EndOfFile) {
return EFI_NOT_FOUND;
}
//
// Look for executable sections
//
if (Section->Type == EFI_SECTION_PE32 || Section->Type == EFI_SECTION_TE) {
if (File->Type == EFI_FV_FILETYPE_SECURITY_CORE) {
*SecCoreImageBase = (PHYSICAL_ADDRESS) (UINTN) (Section + 1);
}
break;
}
}
//
// SEC Core image found
//
if (*SecCoreImageBase != 0) {
return EFI_SUCCESS;
}
}
}
/*
Find and return Pei Core entry point.
It also find SEC and PEI Core file debug inforamtion. It will report them if
remote debug is enabled.
**/
VOID
EFIAPI
FindAndReportEntryPoints (
IN EFI_FIRMWARE_VOLUME_HEADER **BootFirmwareVolumePtr,
OUT EFI_PEI_CORE_ENTRY_POINT *PeiCoreEntryPoint
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS SecCoreImageBase;
EFI_PHYSICAL_ADDRESS PeiCoreImageBase;
PE_COFF_LOADER_IMAGE_CONTEXT ImageContext;
//
// Find SEC Core and PEI Core image base
//
Status = FindImageBase (*BootFirmwareVolumePtr, &SecCoreImageBase);
ASSERT_EFI_ERROR (Status);
FindPeiCoreImageBase (BootFirmwareVolumePtr, &PeiCoreImageBase);
ZeroMem ((VOID *) &ImageContext, sizeof (PE_COFF_LOADER_IMAGE_CONTEXT));
//
// Report SEC Core debug information when remote debug is enabled
//
ImageContext.ImageAddress = SecCoreImageBase;
ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);
PeCoffLoaderRelocateImageExtraAction (&ImageContext);
//
// Report PEI Core debug information when remote debug is enabled
//
ImageContext.ImageAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)PeiCoreImageBase;
ImageContext.PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageContext.ImageAddress);
PeCoffLoaderRelocateImageExtraAction (&ImageContext);
//
// Find PEI Core entry point
//
Status = PeCoffLoaderGetEntryPoint ((VOID *) (UINTN) PeiCoreImageBase, (VOID**) PeiCoreEntryPoint);
if (EFI_ERROR (Status)) {
*PeiCoreEntryPoint = 0;
}
return;
}
VOID
EFIAPI
SecCoreStartupWithStack (
IN EFI_FIRMWARE_VOLUME_HEADER *BootFv,
IN VOID *TopOfCurrentStack
)
{
EFI_SEC_PEI_HAND_OFF SecCoreData;
SEC_IDT_TABLE IdtTableInStack;
IA32_DESCRIPTOR IdtDescriptor;
UINT32 Index;
ProcessLibraryConstructorList (NULL, NULL);
DEBUG ((EFI_D_ERROR,
"SecCoreStartupWithStack(0x%x, 0x%x)\n",
(UINT32)(UINTN)BootFv,
(UINT32)(UINTN)TopOfCurrentStack
));
//
// Initialize floating point operating environment
// to be compliant with UEFI spec.
//
InitializeFloatingPointUnits ();
//
// Initialize IDT
//
IdtTableInStack.PeiService = NULL;
for (Index = 0; Index < SEC_IDT_ENTRY_COUNT; Index ++) {
CopyMem (&IdtTableInStack.IdtTable[Index], &mIdtEntryTemplate, sizeof (mIdtEntryTemplate));
}
IdtDescriptor.Base = (UINTN)&IdtTableInStack.IdtTable;
IdtDescriptor.Limit = (UINT16)(sizeof (IdtTableInStack.IdtTable) - 1);
AsmWriteIdtr (&IdtDescriptor);
//
// |-------------| <-- TopOfCurrentStack
// | Stack | 32k
// |-------------|
// | Heap | 32k
// |-------------| <-- SecCoreData.TemporaryRamBase
//
//
// Initialize SEC hand-off state
//
SecCoreData.DataSize = sizeof(EFI_SEC_PEI_HAND_OFF);
SecCoreData.TemporaryRamSize = SIZE_64KB;
SecCoreData.TemporaryRamBase = (VOID*)((UINT8 *)TopOfCurrentStack - SecCoreData.TemporaryRamSize);
SecCoreData.PeiTemporaryRamBase = SecCoreData.TemporaryRamBase;
SecCoreData.PeiTemporaryRamSize = SecCoreData.TemporaryRamSize >> 1;
SecCoreData.StackBase = (UINT8 *)SecCoreData.TemporaryRamBase + SecCoreData.PeiTemporaryRamSize;
SecCoreData.StackSize = SecCoreData.TemporaryRamSize >> 1;
SecCoreData.BootFirmwareVolumeBase = BootFv;
SecCoreData.BootFirmwareVolumeSize = (UINTN) BootFv->FvLength;
//
// Make sure the 8259 is masked before initializing the Debug Agent and the debug timer is enabled
//
IoWrite8 (0x21, 0xff);
IoWrite8 (0xA1, 0xff);
//
// Initialize Debug Agent to support source level debug in SEC/PEI phases before memory ready.
//
InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, &SecCoreData, SecStartupPhase2);
}
/**
Caller provided function to be invoked at the end of InitializeDebugAgent().
Entry point to the C language phase of SEC. After the SEC assembly
code has initialized some temporary memory and set up the stack,
the control is transferred to this function.
@param[in] Context The first input parameter of InitializeDebugAgent().
**/
VOID
EFIAPI
SecStartupPhase2(
IN VOID *Context
)
{
EFI_SEC_PEI_HAND_OFF *SecCoreData;
EFI_FIRMWARE_VOLUME_HEADER *BootFv;
EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint;
SecCoreData = (EFI_SEC_PEI_HAND_OFF *) Context;
//
// Find PEI Core entry point. It will report SEC and Pei Core debug information if remote debug
// is enabled.
//
BootFv = (EFI_FIRMWARE_VOLUME_HEADER *)SecCoreData->BootFirmwareVolumeBase;
FindAndReportEntryPoints (&BootFv, &PeiCoreEntryPoint);
SecCoreData->BootFirmwareVolumeBase = BootFv;
SecCoreData->BootFirmwareVolumeSize = (UINTN) BootFv->FvLength;
//
// Transfer the control to the PEI core
//
(*PeiCoreEntryPoint) (SecCoreData, (EFI_PEI_PPI_DESCRIPTOR *)&mPrivateDispatchTable);
//
// If we get here then the PEI Core returned, which is not recoverable.
//
ASSERT (FALSE);
CpuDeadLoop ();
}
EFI_STATUS
EFIAPI
TemporaryRamMigration (
IN CONST EFI_PEI_SERVICES **PeiServices,
IN EFI_PHYSICAL_ADDRESS TemporaryMemoryBase,
IN EFI_PHYSICAL_ADDRESS PermanentMemoryBase,
IN UINTN CopySize
)
{
IA32_DESCRIPTOR IdtDescriptor;
VOID *OldHeap;
VOID *NewHeap;
VOID *OldStack;
VOID *NewStack;
DEBUG_AGENT_CONTEXT_POSTMEM_SEC DebugAgentContext;
BOOLEAN OldStatus;
BASE_LIBRARY_JUMP_BUFFER JumpBuffer;
DEBUG ((EFI_D_ERROR, "TemporaryRamMigration(0x%x, 0x%x, 0x%x)\n", (UINTN)TemporaryMemoryBase, (UINTN)PermanentMemoryBase, CopySize));
OldHeap = (VOID*)(UINTN)TemporaryMemoryBase;
NewHeap = (VOID*)((UINTN)PermanentMemoryBase + (CopySize >> 1));
OldStack = (VOID*)((UINTN)TemporaryMemoryBase + (CopySize >> 1));
NewStack = (VOID*)(UINTN)PermanentMemoryBase;
DebugAgentContext.HeapMigrateOffset = (UINTN)NewHeap - (UINTN)OldHeap;
DebugAgentContext.StackMigrateOffset = (UINTN)NewStack - (UINTN)OldStack;
OldStatus = SaveAndSetDebugTimerInterrupt (FALSE);
InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, (VOID *) &DebugAgentContext, NULL);
//
// Migrate Heap
//
CopyMem (NewHeap, OldHeap, CopySize >> 1);
//
// Migrate Stack
//
CopyMem (NewStack, OldStack, CopySize >> 1);
//
// Rebase IDT table in permanent memory
//
AsmReadIdtr (&IdtDescriptor);
IdtDescriptor.Base = IdtDescriptor.Base - (UINTN)OldStack + (UINTN)NewStack;
AsmWriteIdtr (&IdtDescriptor);
//
// Use SetJump()/LongJump() to switch to a new stack.
//
if (SetJump (&JumpBuffer) == 0) {
#if defined (MDE_CPU_IA32)
JumpBuffer.Esp = JumpBuffer.Esp + DebugAgentContext.StackMigrateOffset;
#endif
#if defined (MDE_CPU_X64)
JumpBuffer.Rsp = JumpBuffer.Rsp + DebugAgentContext.StackMigrateOffset;
#endif
LongJump (&JumpBuffer, (UINTN)-1);
}
SaveAndSetDebugTimerInterrupt (OldStatus);
return EFI_SUCCESS;
}
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