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CloverBootloader/MemoryFix/OsxAptioFixDrv/OsxAptioFix3Drv.c

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/**
UEFI driver for enabling loading of OSX without memory relocation.
by dmazar
**/
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DebugLib.h>
#include <Library/CpuLib.h>
#include <Guid/GlobalVariable.h>
#include <Protocol/LoadedImage.h>
#include "BootFixes3.h"
#include "DecodedKernelCheck.h"
#include "BootArgs.h"
#include "AsmFuncs.h"
#include "VMem.h"
#include "Lib.h"
#include "Hibernate.h"
#include "NVRAMDebug.h"
#include "RTShims.h"
// DBG_TO: 0=no debug, 1=serial, 2=console
// serial requires
// [PcdsFixedAtBuild]
// gEfiMdePkgTokenSpaceGuid.PcdDebugPropertyMask|0x07
// gEfiMdePkgTokenSpaceGuid.PcdDebugPrintErrorLevel|0xFFFFFFFF
// in package DSC file
#define DBG_TO 0
#if DBG_TO == 2
#define DBG(...) AsciiPrint(__VA_ARGS__);
#elif DBG_TO == 1
#define DBG(...) DebugPrint(1, __VA_ARGS__);
#else
#define DBG(...)
#endif
#include "../Version.h"
CONST CHAR8* CloverRevision = REVISION_STR;
STATIC UINTN Counter = 0;
// TRUE if we are doing hibernate wake
BOOLEAN gHibernateWake = FALSE;
// placeholders for storing original Boot and RT Services functions
EFI_ALLOCATE_PAGES gStoredAllocatePages = NULL;
EFI_GET_MEMORY_MAP gStoredGetMemoryMap = NULL;
EFI_EXIT_BOOT_SERVICES gStoredExitBootServices = NULL;
EFI_IMAGE_START gStartImage = NULL;
EFI_HANDLE_PROTOCOL gHandleProtocol = NULL;
EFI_SET_VIRTUAL_ADDRESS_MAP gStoredSetVirtualAddressMap = NULL;
UINT32 OrgRTCRC32 = 0;
// monitoring AlocatePages
EFI_PHYSICAL_ADDRESS gMinAllocatedAddr = 0;
EFI_PHYSICAL_ADDRESS gMaxAllocatedAddr = 0;
// relocation base address
EFI_PHYSICAL_ADDRESS gRelocBase = 0;
// relocation block size in pages
UINTN gRelocSizePages = 0;
// location of memory allocated by boot.efi for hibernate image
EFI_PHYSICAL_ADDRESS gHibernateImageAddress = 0;
// last memory map obtained by boot.efi
UINTN gLastMemoryMapSize = 0;
EFI_MEMORY_DESCRIPTOR *gLastMemoryMap = NULL;
UINTN gLastDescriptorSize = 0;
UINT32 gLastDescriptorVersion = 0;
/** Helper function that calls GetMemoryMap() and returns new MapKey.
* Uses gStoredGetMemoryMap, so can be called only after gStoredGetMemoryMap is set.
*/
EFI_STATUS
GetMemoryMapKey(OUT UINTN *MapKey)
{
EFI_STATUS Status;
UINTN MemoryMapSize;
EFI_MEMORY_DESCRIPTOR *MemoryMap;
UINTN DescriptorSize;
UINT32 DescriptorVersion;
Status = GetMemoryMapAlloc(gStoredGetMemoryMap, &MemoryMapSize, &MemoryMap, MapKey, &DescriptorSize, &DescriptorVersion);
return Status;
}
/** Helper function that calculates number of RT and MMIO pages from mem map. */
EFI_STATUS
GetNumberOfRTPages(OUT UINTN *NumPages)
{
EFI_STATUS Status;
UINTN MemoryMapSize;
EFI_MEMORY_DESCRIPTOR *MemoryMap;
UINTN MapKey;
UINTN DescriptorSize;
UINT32 DescriptorVersion;
UINTN NumEntries;
UINTN Index;
EFI_MEMORY_DESCRIPTOR *Desc;
Status = GetMemoryMapAlloc(gBS->GetMemoryMap, &MemoryMapSize, &MemoryMap, &MapKey, &DescriptorSize, &DescriptorVersion);
if (EFI_ERROR(Status)) {
return Status;
}
//
// Apply some fixes
//
FixMemMap(MemoryMapSize, MemoryMap, DescriptorSize, DescriptorVersion);
//
// Sum RT and MMIO areas - all that have runtime attribute
//
*NumPages = 0;
Desc = MemoryMap;
NumEntries = MemoryMapSize / DescriptorSize;
for (Index = 0; Index < NumEntries; Index++) {
if ((Desc->Attribute & EFI_MEMORY_RUNTIME) != 0) {
*NumPages += Desc->NumberOfPages;
}
Desc = NEXT_MEMORY_DESCRIPTOR(Desc, DescriptorSize);
}
return Status;
}
/** gBS->HandleProtocol override:
* Boot.efi requires EfiGraphicsOutputProtocol on ConOutHandle, but it is not present
* there on Aptio 2.0. EfiGraphicsOutputProtocol exists on some other handle.
* If this is the case, we'll intercept that call and return EfiGraphicsOutputProtocol
* from that other handle.
*/
EFI_STATUS EFIAPI
MOHandleProtocol(
IN EFI_HANDLE Handle,
IN EFI_GUID *Protocol,
OUT VOID **Interface
)
{
EFI_STATUS res;
EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput;
// special handling if gEfiGraphicsOutputProtocolGuid is requested by boot.efi
if (CompareGuid(Protocol, &gEfiGraphicsOutputProtocolGuid)) {
res = gHandleProtocol(Handle, Protocol, Interface);
if (res != EFI_SUCCESS) {
// let's find it on some other handle
res = gBS->LocateProtocol(&gEfiGraphicsOutputProtocolGuid, NULL, (VOID**)&GraphicsOutput);
if (res == EFI_SUCCESS) {
// return it
*Interface = GraphicsOutput;
// DBG("->HandleProtocol(%p, %s, %p) = %r (returning from other handle)\n", Handle, GuidStr(Protocol), *Interface, res);
DBGnvr("->HandleProtocol(%p, %s, %p) = %r (from other handle)\n", Handle, GuidStr(Protocol), *Interface, res);
return res;
}
}
DBGnvr("->HandleProtocol(%p, %s, %p) = %r\n", Handle, GuidStr(Protocol), *Interface, res);
} else {
res = gHandleProtocol(Handle, Protocol, Interface);
}
// DBG("->HandleProtocol(%p, %s, %p) = %r\n", Handle, GuidStr(Protocol), *Interface, res);
return res;
}
/** gBS->AllocatePages override:
* Returns pages from free memory block to boot.efi for kernel boot image.
*/
EFI_STATUS
EFIAPI
MOAllocatePages (
IN EFI_ALLOCATE_TYPE Type,
IN EFI_MEMORY_TYPE MemoryType,
IN UINTN NumberOfPages,
IN OUT EFI_PHYSICAL_ADDRESS *Memory
)
{
EFI_STATUS Status;
EFI_PHYSICAL_ADDRESS UpperAddr;
// EFI_PHYSICAL_ADDRESS MemoryIn;
// BOOLEAN FromRelocBlock = FALSE;
// MemoryIn = *Memory;
if (Type == AllocateAddress && MemoryType == EfiLoaderData) {
// called from boot.efi
UpperAddr = *Memory + EFI_PAGES_TO_SIZE(NumberOfPages);
// store min and max mem - can be used later to determine start and end of kernel boot image
if (gMinAllocatedAddr == 0 || *Memory < gMinAllocatedAddr) gMinAllocatedAddr = *Memory;
if (UpperAddr > gMaxAllocatedAddr) gMaxAllocatedAddr = UpperAddr;
Status = gStoredAllocatePages(Type, MemoryType, NumberOfPages, Memory);
// FromRelocBlock = FALSE;
} else if (gHibernateWake && Type == AllocateAnyPages && MemoryType == EfiLoaderData) {
// called from boot.efi during hibernate wake
// first such allocation is for hibernate image
Status = gStoredAllocatePages(Type, MemoryType, NumberOfPages, Memory);
if (gHibernateImageAddress == 0 && Status == EFI_SUCCESS) {
gHibernateImageAddress = *Memory;
}
} else {
// default page allocation
Status = gStoredAllocatePages(Type, MemoryType, NumberOfPages, Memory);
}
//DBG("AllocatePages(%s, %s, %x, %lx/%lx) = %r %c\n",
// EfiAllocateTypeDesc[Type], EfiMemoryTypeDesc[MemoryType], NumberOfPages, MemoryIn, *Memory, Status, FromRelocBlock ? L'+' : L' ');
return Status;
}
/** gBS->GetMemoryMap override:
* Returns shrinked memory map. I think kernel can handle up to 128 entries.
*/
EFI_STATUS
EFIAPI
MOGetMemoryMap (
IN OUT UINTN *MemoryMapSize,
IN OUT EFI_MEMORY_DESCRIPTOR *MemoryMap,
OUT UINTN *MapKey,
OUT UINTN *DescriptorSize,
OUT UINT32 *DescriptorVersion
)
{
EFI_STATUS Status;
Status = gStoredGetMemoryMap(MemoryMapSize, MemoryMap, MapKey, DescriptorSize, DescriptorVersion);
//PrintMemMap(*MemoryMapSize, MemoryMap, *DescriptorSize, *DescriptorVersion);
DBGnvr("GetMemoryMap: %p = %r\n", MemoryMap, Status);
if (Status == EFI_SUCCESS) {
FixMemMap(*MemoryMapSize, MemoryMap, *DescriptorSize, *DescriptorVersion);
ShrinkMemMap(MemoryMapSize, MemoryMap, *DescriptorSize, *DescriptorVersion);
//PrintMemMap(*MemoryMapSize, MemoryMap, *DescriptorSize, *DescriptorVersion);
// remember last/final memmap
gLastMemoryMapSize = *MemoryMapSize;
gLastMemoryMap = MemoryMap;
gLastDescriptorSize = *DescriptorSize;
gLastDescriptorVersion = *DescriptorVersion;
}
return Status;
}
/** gBS->ExitBootServices override:
* Patches kernel entry point with jump to our KernelEntryPatchJumpBack().
*/
EFI_STATUS
EFIAPI
MOExitBootServices (
IN EFI_HANDLE ImageHandle,
IN UINTN MapKey
)
{
EFI_STATUS Status;
UINTN NewMapKey;
UINTN SlideAddr = 0;
VOID *MachOImage = NULL;
IOHibernateImageHeader *ImageHeader = NULL;
// we need hibernate image address for wake
if (gHibernateWake && gHibernateImageAddress == 0) {
Print(L"OsxAptioFix3 error: Doing hibernate wake, but did not find hibernate image address.");
Print(L"... waiting 5 secs ...\n");
gBS->Stall(5000000);
return EFI_INVALID_PARAMETER;
}
// for tests: we can just return EFI_SUCCESS and continue using Print for debug.
// Status = EFI_SUCCESS;
//Print(L"ExitBootServices()\n");
Status = gStoredExitBootServices(ImageHandle, MapKey);
DBGnvr("ExitBootServices: = %r\n", Status);
if (EFI_ERROR (Status)) {
// just report error as var in nvram to be visible from OSX with "nvram -p"
gRT->SetVariable(L"OsxAptioFixDrv-ErrorExitingBootServices",
&gEfiAppleBootGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
3,
"Yes"
);
Status = GetMemoryMapKey(&NewMapKey);
DBGnvr("ExitBootServices: GetMemoryMapKey = %r\n", Status);
if (Status == EFI_SUCCESS) {
// we have latest mem map and NewMapKey
// we'll try again ExitBootServices with NewMapKey
Status = gStoredExitBootServices(ImageHandle, NewMapKey);
DBGnvr("ExitBootServices: 2nd try = %r\n", Status);
if (EFI_ERROR (Status)) {
// Error!
Print(L"OsxAptioFix3Drv: Error ExitBootServices() 2nd try = Status: %r\n", Status);
}
} else {
Print(L"OsxAptioFix3Drv: Error ExitBootServices(), GetMemoryMapKey() = Status: %r\n", Status);
Status = EFI_INVALID_PARAMETER;
}
}
if (EFI_ERROR(Status)) {
Print(L"... waiting 10 secs ...\n");
gBS->Stall(10*1000000);
return Status;
}
if (!gHibernateWake) {
// normal boot
DBG("ExitBootServices: gMinAllocatedAddr: %lx, gMaxAllocatedAddr: %lx\n", gMinAllocatedAddr, gMaxAllocatedAddr);
SlideAddr = gMinAllocatedAddr - 0x100000;
MachOImage = (VOID*)(UINTN)(SlideAddr + 0x200000);
KernelEntryFromMachOPatchJump(MachOImage, SlideAddr);
} else {
// hibernate wake
// at this stage HIB section is not yet copied from sleep image to it's
// proper memory destination. so we'll patch entry point in sleep image.
ImageHeader = (IOHibernateImageHeader *)(UINTN)gHibernateImageAddress;
KernelEntryPatchJump( ((UINT32)(UINTN)&(ImageHeader->fileExtentMap[0])) + ImageHeader->fileExtentMapSize + ImageHeader->restore1CodeOffset );
}
return Status;
}
/** gRT->SetVirtualAddressMap override:
* Fixes virtualizing of RT services.
*/
EFI_STATUS EFIAPI
OvrSetVirtualAddressMap(
IN UINTN MemoryMapSize,
IN UINTN DescriptorSize,
IN UINT32 DescriptorVersion,
IN EFI_MEMORY_DESCRIPTOR *VirtualMap
)
{
EFI_STATUS Status;
UINT32 EfiSystemTable;
DBG("->SetVirtualAddressMap(%d, %d, 0x%x, %p) START ...\n", MemoryMapSize, DescriptorSize, DescriptorVersion, VirtualMap);
DBGnvr("->SetVirtualAddressMap(%d, %d, 0x%x, %p) START ...\n", MemoryMapSize, DescriptorSize, DescriptorVersion, VirtualMap);
// restore origs
gRT->Hdr.CRC32 = OrgRTCRC32;
gRT->SetVirtualAddressMap = gStoredSetVirtualAddressMap;
// Protect RT data areas from relocation by marking then MemMapIO
ProtectRtDataFromRelocation(MemoryMapSize, DescriptorSize, DescriptorVersion, VirtualMap);
// Remember physical sys table addr
EfiSystemTable = (UINT32)(UINTN)gST;
// virtualize RT services with all needed fixes
Status = ExecSetVirtualAddressesToMemMap(MemoryMapSize, DescriptorSize, DescriptorVersion, VirtualMap);
CopyEfiSysTableToSeparateRtDataArea(&EfiSystemTable);
// we will defragment RT data and code that is left unprotected.
// this will also mark those as AcpiNVS and by this protect it
// from boot.efi relocation and zeroing
DefragmentRuntimeServices(MemoryMapSize,
DescriptorSize,
DescriptorVersion,
VirtualMap,
NULL,
gHibernateWake ? FALSE : TRUE
);
// For AptioFix V2 we can correct the pointers earlier
VirtualizeRTShimPointers(MemoryMapSize, DescriptorSize, VirtualMap);
return Status;
}
/** Callback called when boot.efi jumps to kernel. */
UINTN
EFIAPI
KernelEntryPatchJumpBack(UINTN bootArgs, BOOLEAN ModeX64)
{
DBGnvr("\nBACK FROM KERNEL: BootArgs = %x, KernelEntry: %x, Kernel called in %s bit mode\n", bootArgs, AsmKernelEntry, (ModeX64 ? L"64" : L"32"));
if (!gHibernateWake) {
bootArgs = FixBootingWithoutRelocBlock(bootArgs, ModeX64);
} else {
bootArgs = FixHibernateWakeWithoutRelocBlock(bootArgs, ModeX64);
}
DBGnvr("BACK TO KERNEL: BootArgs = %x, KImgStartReloc = %x, KImgStart = %x, KImgSize = %x\n",
bootArgs, AsmKernelImageStartReloc, AsmKernelImageStart, AsmKernelImageSize);
return bootArgs;
}
/** SWITCH_STACK_ENTRY_POINT implementation:
* Allocates kernel image reloc block, installs UEFI overrides and starts given image.
* If image returns, then deinstalls overrides and releases kernel image reloc block.
*
* If started with ImgContext->JumpBuffer, then it will return with LongJump().
*/
EFI_STATUS
RunImageWithOverrides(
IN EFI_HANDLE ImageHandle,
IN EFI_LOADED_IMAGE_PROTOCOL *Image,
OUT UINTN *ExitDataSize,
OUT CHAR16 **ExitData OPTIONAL
)
{
EFI_STATUS Status;
// save current 64bit state - will be restored later in callback from kernel jump
// and relocate MyAsmCopyAndJumpToKernel32 code to higher mem (for copying kernel back to
// proper place and jumping back to it)
Status = PrepareJumpFromKernel();
if (EFI_ERROR(Status)) {
return Status;
}
// init VMem memory pool - will be used after ExitBootServices
Status = VmAllocateMemoryPool();
if (EFI_ERROR(Status)) {
return Status;
}
Status = gBS->AllocatePool (
EfiRuntimeServicesCode,
((UINTN)&gRTShimsDataEnd - (UINTN)&gRTShimsDataStart),
&RTShims
);
if (!EFI_ERROR (Status)) {
gGetVariable = (UINTN)gRT->GetVariable;
gGetNextVariableName = (UINTN)gRT->GetNextVariableName;
gSetVariable = (UINTN)gRT->SetVariable;
CopyMem (
RTShims,
(VOID *)&gRTShimsDataStart,
((UINTN)&gRTShimsDataEnd - (UINTN)&gRTShimsDataStart)
);
gRT->GetVariable = (EFI_GET_VARIABLE)((UINTN)RTShims + ((UINTN)&RTShimGetVariable - (UINTN)&gRTShimsDataStart));
gRT->GetNextVariableName = (EFI_GET_NEXT_VARIABLE_NAME)((UINTN)RTShims + ((UINTN)&RTShimGetNextVariableName - (UINTN)&gRTShimsDataStart));
gRT->SetVariable = (EFI_SET_VARIABLE)((UINTN)RTShims + ((UINTN)&RTShimSetVariable - (UINTN)&gRTShimsDataStart));
gRT->Hdr.CRC32 = 0;
gBS->CalculateCrc32 (gRT, gRT->Hdr.HeaderSize, &gRT->Hdr.CRC32);
} else {
RTShims = NULL;
}
// clear monitoring vars
gMinAllocatedAddr = 0;
gMaxAllocatedAddr = 0;
// save original BS functions
gStoredAllocatePages = gBS->AllocatePages;
gStoredGetMemoryMap = gBS->GetMemoryMap;
gStoredExitBootServices = gBS->ExitBootServices;
gHandleProtocol = gBS->HandleProtocol;
// install our overrides
gBS->AllocatePages = MOAllocatePages;
gBS->GetMemoryMap = MOGetMemoryMap;
gBS->ExitBootServices = MOExitBootServices;
gBS->HandleProtocol = MOHandleProtocol;
gBS->Hdr.CRC32 = 0;
gBS->CalculateCrc32(gBS, gBS->Hdr.HeaderSize, &gBS->Hdr.CRC32);
OrgRTCRC32 = gRT->Hdr.CRC32;
gStoredSetVirtualAddressMap = gRT->SetVirtualAddressMap;
gRT->SetVirtualAddressMap = OvrSetVirtualAddressMap;
gRT->Hdr.CRC32 = 0;
gBS->CalculateCrc32(gRT, gRT->Hdr.HeaderSize, &gRT->Hdr.CRC32);
// force boot.efi to use our copy od system table
DBG("StartImage: orig sys table: %p\n", Image->SystemTable);
Image->SystemTable = (EFI_SYSTEM_TABLE *)(UINTN)gSysTableRtArea;
DBG("StartImage: new sys table: %p\n", Image->SystemTable);
// run image
Status = gStartImage(ImageHandle, ExitDataSize, ExitData);
// if we get here then boot.efi did not start kernel
// and we'll try to do some cleanup ...
// return back originals
gBS->AllocatePages = gStoredAllocatePages;
gBS->GetMemoryMap = gStoredGetMemoryMap;
gBS->ExitBootServices = gStoredExitBootServices;
gBS->HandleProtocol = gHandleProtocol;
gBS->Hdr.CRC32 = 0;
gBS->CalculateCrc32(gBS, gBS->Hdr.HeaderSize, &gBS->Hdr.CRC32);
gRT->SetVirtualAddressMap = gStoredSetVirtualAddressMap;
gBS->CalculateCrc32(gRT, gRT->Hdr.HeaderSize, &gRT->Hdr.CRC32);
return Status;
}
/** gBS->StartImage override:
* Called to start an efi image.
*
* If this is boot.efi, then run it with our overrides.
*/
EFI_STATUS
EFIAPI
MOStartImage (
IN EFI_HANDLE ImageHandle,
OUT UINTN *ExitDataSize,
OUT CHAR16 **ExitData OPTIONAL
)
{
EFI_STATUS Status;
EFI_LOADED_IMAGE_PROTOCOL *Image;
CHAR16 *FilePathText = NULL;
UINTN Size = 0;
VOID *Value = NULL;
UINTN Size2 = 0;
CHAR16 *StartFlag = NULL;
DBG("StartImage(%lx)\n", ImageHandle);
// find out image name from EfiLoadedImageProtocol
Status = gBS->OpenProtocol(ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **) &Image, gImageHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
if (Status != EFI_SUCCESS) {
DBG("ERROR: MOStartImage: OpenProtocol(gEfiLoadedImageProtocolGuid) = %r\n", Status);
return EFI_INVALID_PARAMETER;
}
FilePathText = FileDevicePathToText(Image->FilePath);
if (FilePathText != NULL) {
DBG("FilePath: %s\n", FilePathText);
}
DBG("ImageBase: %p - %lx (%lx)\n", Image->ImageBase, (UINT64)Image->ImageBase + Image->ImageSize, Image->ImageSize);
Status = gBS->CloseProtocol(ImageHandle, &gEfiLoadedImageProtocolGuid, gImageHandle, NULL);
if (EFI_ERROR(Status)) {
DBG("CloseProtocol error: %r\n", Status);
}
if (StrStriBasic(FilePathText,L"boot.efi") /*|| StrStriBasic(FilePathText,L"booter")*/) {
Status = GetVariable2 (L"aptiofixflag", &gEfiAppleBootGuid, &Value, &Size2);
if (!EFI_ERROR(Status)) {
Status = gRT->SetVariable(L"recovery-boot-mode", &gEfiAppleBootGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
Size2, Value);
if (EFI_ERROR(Status)) {
DBG(" Something goes wrong while setting recovery-boot-mode\n");
}
Status = gRT->SetVariable (L"aptiofixflag", &gEfiAppleBootGuid, 0, 0, NULL);
FreePool(Value);
}
Size2 =0;
//Check recovery-boot-mode present for nested boot.efi
Status = GetVariable2 (L"recovery-boot-mode", &gEfiAppleBootGuid, &Value, &Size2);
if (!EFI_ERROR(Status)) {
//If it presents, then wait for \com.apple.recovery.boot\boot.efi boot
DBG(" recovery-boot-mode present\n");
StartFlag = StrStriBasic(FilePathText,L"\\com.apple.recovery.boot\\boot.efi");
if (Counter > 0x00){
Status = gRT->SetVariable(L"aptiofixflag", &gEfiAppleBootGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
Size2, Value);
if (EFI_ERROR(Status)) {
DBG("Something goes wrong! \n");
}
gRT->ResetSystem(EfiResetWarm, EFI_SUCCESS, 0, NULL);
}
} else {
StartFlag = StrStriBasic(FilePathText,L"boot.efi");
/*if (!StartFlag) {
StartFlag = StrStriBasic(FilePathText,L"booter") ;
}*/
}
FreePool(Value);
}
// check if this is boot.efi
// if (StrStriBasic(FilePathText, L"boot.efi")) {
if (StartFlag) {
Counter++;
//the presence of the variable means HibernateWake
//if the wake is canceled then the variable must be deleted
Status = gRT->GetVariable(L"boot-switch-vars", &gEfiAppleBootGuid, NULL, &Size, NULL);
gHibernateWake = (Status == EFI_BUFFER_TOO_SMALL);
Print(L"OsxAptioFix3Drv: Starting overrides for %s\nUsing reloc block: no, hibernate wake: %s \n",
FilePathText, gHibernateWake ? L"yes" : L"no");
//gBS->Stall(2000000);
// run with our overrides
Status = RunImageWithOverrides(ImageHandle, Image, ExitDataSize, ExitData);
} else {
// call original function to do the job
Status = gStartImage(ImageHandle, ExitDataSize, ExitData);
}
if (FilePathText != NULL) {
gBS->FreePool(FilePathText);
}
return Status;
}
/** Entry point. Installs our StartImage override.
* All other stuff will be installed from there when boot.efi is started.
*/
EFI_STATUS
EFIAPI
OsxAptioFixDrvEntrypoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
// install StartImage override
// all other overrides will be started when boot.efi is started
gStartImage = gBS->StartImage;
gBS->StartImage = MOStartImage;
gBS->Hdr.CRC32 = 0;
gBS->CalculateCrc32(gBS, gBS->Hdr.HeaderSize, &gBS->Hdr.CRC32);
return EFI_SUCCESS;
}
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