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remake kernelPm patch, not enabled yet

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Signed-off-by: SergeySlice <sergey.slice@gmail.com>
This commit is contained in:
SergeySlice 2020-05-04 22:31:12 +03:00
parent 702e0d49c2
commit 85aee74658
3 changed files with 75 additions and 16 deletions
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10
rEFIt_UEFI/Platform/Settings.cpp
View File

@ -911,11 +911,6 @@ FillinKextPatches (IN OUT KERNEL_AND_KEXT_PATCHES *Patches,
return FALSE;
}
if (NeedPMfix) {
Patches->KPKernelPm = TRUE;
Patches->KPAppleIntelCPUPM = TRUE;
}
Prop = GetProperty(DictPointer, "Debug");
if (Prop != NULL || gBootChanged) {
Patches->KPDebug = IsPropertyTrue (Prop);
@ -953,6 +948,11 @@ FillinKextPatches (IN OUT KERNEL_AND_KEXT_PATCHES *Patches,
if (Prop != NULL || gBootChanged) {
Patches->KPAppleIntelCPUPM = IsPropertyTrue (Prop);
}
//anyway
if (NeedPMfix) {
Patches->KPKernelPm = TRUE;
Patches->KPAppleIntelCPUPM = TRUE;
}
Prop = GetProperty(DictPointer, "AppleRTC");
if (Prop != NULL || gBootChanged) {

74
rEFIt_UEFI/Platform/kernel_patcher.cpp
View File

@ -751,20 +751,80 @@ VOID LOADER_ENTRY::KernelCPUIDPatch(UINT8* kernelData)
}
}
// Credits to RehabMan for the kernel patch information
// new way by RehabMan 2017-08-13
// cleanup by Sherlocks 2020-03-23
#define CompareWithMask(x,m,c) (((x) & (m)) == (c))
//TODO - remake using CompareMemMask
BOOLEAN LOADER_ENTRY::KernelPatchPm(VOID *kernelData)
{
DBG_RT("Patching kernel power management...\n");
UINT8 *Kernel = (UINT8 *)kernelData;
#if NEW_PM
//Slice
//1. procedure xcpm_idle
// wrmsr 0xe2 twice
// B9E2000000 0F30 replace to eb05
UINTN procLen = 0;
UINTN procLocation = searchProc(Kernel, "xcpm_idle", &procLen);
const UINT8 findJmp[] = {0xB9, 0xE2, 0x00, 0x00, 0x00, 0x0F, 0x30};
const UINT8 patchJmp[] = {0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90};
DBG_RT("==> xcpm_idle at %llx\n", procLocation);
INTN Num = SearchAndReplace(&Kernel[procLocation], 0x400, findJmp, sizeof(findJmp), patchJmp, 0);
//2. procedure xcpm_init
// indirect call to _xcpm_core_scope_msrs and _xcpm_SMT_scope_msrs
// 488D3DDA317600 lea rdi, qword [ds:_xcpm_SMT_scope_msrs]
// BE0B000000 mov esi, 0xb => replace to eb0a
// 31D2 xor edx, edx
// E87EFCFFFF call sub_ffffff80004fa610 => check e8?
// there are other occurence of _xcpm_SMT_scope_msrs so check 488D3D or E8 at .+7
// or restrict len = 0x200
procLocation = searchProc(Kernel, "xcpm_init", &procLen);
UINTN symbol1 = searchProc(Kernel, "xcpm_core_scope_msrs", &procLen);
UINTN patchLocation1 = FindRelative32(Kernel, procLocation, 0x200, symbol1);
if (patchLocation1 != 0) {
DBG_RT("=> xcpm_core_scope_msrs found at %llx\n", patchLocation1);
if (Kernel[patchLocation1 + 7] == 0xE8) {
DBG_RT("=> patch applied\n");
Kernel[patchLocation1] = 0xEB;
Kernel[patchLocation1 + 1] = 0x0A;
} else {
DBG_RT("=> patttern not good\n");
for (int i=0; 0x10; ++i) {
DBG_RT("%02x", Kernel[patchLocation1 + i]);
}
DBG_RT("\n");
}
}
UINTN symbol2 = searchProc(Kernel, "_xcpm_SMT_scope_msrs", &procLen);
patchLocation1 = FindRelative32(Kernel, procLocation, 0x200, symbol2);
if (patchLocation1 != 0) {
DBG_RT("=> _xcpm_SMT_scope_msrs found at %llx\n", patchLocation2);
if (Kernel[patchLocation1 + 7] == 0xE8) {
DBG_RT("=> patch applied\n");
Kernel[patchLocation1] = 0xEB;
Kernel[patchLocation1 + 1] = 0x0A;
} else {
DBG_RT("=> patttern not good\n");
for (int i=0; 0x10; ++i) {
DBG_RT("%02x", Kernel[patchLocation1 + i]);
}
DBG_RT("\n");
}
}
#else
// Credits to RehabMan for the kernel patch information
// new way by RehabMan 2017-08-13
// cleanup by Sherlocks 2020-03-23
#define CompareWithMask(x,m,c) (((x) & (m)) == (c))
//TODO - remake using CompareMemMask
UINT64* Ptr = (UINT64*)kernelData;
UINT64* End = Ptr + 0x1000000/sizeof(UINT64);
if (Ptr == NULL) {
return FALSE;
}
DBG_RT("Patching kernel power management...\n");
for (; Ptr < End; Ptr += 2) {
// check for xcpm_scope_msr common 0xE2 prologue
@ -805,7 +865,7 @@ BOOLEAN LOADER_ENTRY::KernelPatchPm(VOID *kernelData)
if (KernelAndKextPatches->KPDebug) {
gBS->Stall(3000000);
}
#endif
return TRUE;
}

7
rEFIt_UEFI/Platform/kext_patcher.cpp
View File

@ -1047,10 +1047,9 @@ VOID LOADER_ENTRY::AnyKextPatch(UINT8 *Driver, UINT32 DriverSize, CHAR8 *InfoPli
UINTN procLen = 0;
UINTN procAddr = searchProcInDriver(Driver, DriverSize, KernelAndKextPatches->KextPatches[N].ProcedureName);
if (SearchLen == 0) {
SearchLen = DriverSize;
procLen = DriverSize - procAddr;
once = true;
if (SearchLen == DriverSize) {
procLen = DriverSize - procAddr;
once = true;
} else {
procLen = SearchLen;
}