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Kernel patcher and FakeCPUID for Tiger and Leopard

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This commit is contained in:
Florin9doi 2019-12-22 13:45:50 +02:00
parent 4c3655d954
commit da3f447b2e
1 changed files with 27 additions and 13 deletions
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36
rEFIt_UEFI/Platform/kernel_patcher.c
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@ -417,12 +417,11 @@ VOID KernelPatcher_32(VOID* kernelData, CHAR8 *OSVersion)
//Slice - FakeCPUID substitution, (c)2014
//procedure location
STATIC UINT8 StrCpuid1[] = {
0xb8, 0x01, 0x00, 0x00, 0x00, 0x31, 0xdb, 0x89, 0xd9, 0x89, 0xda, 0x0f, 0xa2};
STATIC UINT8 StrCpuid1_tigLeo[] = {0xb9, 0x01, 0x00, 0x00, 0x00, 0x89, 0xc8, 0x0f, 0xa2};
STATIC UINT8 StrCpuid1_snowLeo[] = {0xb8, 0x01, 0x00, 0x00, 0x00, 0x31, 0xdb, 0x89, 0xd9, 0x89, 0xda, 0x0f, 0xa2};
STATIC UINT8 StrMsr8b[] = {0xb9, 0x8b, 0x00, 0x00, 0x00, 0x0f, 0x32};
// Snow Leopard
// Tiger/Leopard/Snow Leopard
/*
This patch searches
and eax, 0xf0 || and eax, 0x0f0000
@ -430,9 +429,9 @@ STATIC UINT8 StrMsr8b[] = {0xb9, 0x8b, 0x00, 0x00, 0x00, 0x0f, 0x32};
and replaces to
mov eax, FakeModel | mov eax, FakeExt
*/
STATIC UINT8 SnowSearchModel[] = {0x25, 0xf0, 0x00, 0x00, 0x00, 0xc1, 0xe8, 0x04};
STATIC UINT8 SnowSearchExt[] = {0x25, 0x00, 0x00, 0x0f, 0x00, 0xc1, 0xe8, 0x10};
STATIC UINT8 SnowReplaceModel[] = {0xb8, 0x07, 0x00, 0x00, 0x00, 0x90, 0x90, 0x90};
STATIC UINT8 TigLeoSLSearchModel[] = {0x25, 0xf0, 0x00, 0x00, 0x00, 0xc1, 0xe8, 0x04};
STATIC UINT8 TigLeoSLSearchExt[] = {0x25, 0x00, 0x00, 0x0f, 0x00, 0xc1, 0xe8, 0x10};
STATIC UINT8 TigLeoSLReplaceModel[] = {0xb8, 0x07, 0x00, 0x00, 0x00, 0x90, 0x90, 0x90};
// Lion
/*
@ -530,11 +529,19 @@ BOOLEAN PatchCPUID(UINT8* bytes, UINT8* Location, INT32 LenLoc,
VOID KernelCPUIDPatch(UINT8* kernelData, LOADER_ENTRY *Entry)
{
// Tiger/Leopard patterns
DBG_RT(Entry, "CPUID: try Tiger/Leopard patch...\n");
if (PatchCPUID(kernelData, &StrCpuid1_tigLeo[0], sizeof(StrCpuid1_tigLeo), &TigLeoSLSearchModel[0],
&TigLeoSLSearchExt[0], &TigLeoSLReplaceModel[0], &TigLeoSLReplaceModel[0],
sizeof(TigLeoSLSearchModel), Entry)) {
DBG_RT(Entry, "...done!\n");
return;
}
// Snow Leopard patterns
DBG_RT(Entry, "CPUID: try Snow Leopard patch...\n");
if (PatchCPUID(kernelData, &StrCpuid1[0], sizeof(StrCpuid1), &SnowSearchModel[0],
&SnowSearchExt[0], &SnowReplaceModel[0], &SnowReplaceModel[0],
sizeof(SnowSearchModel), Entry)) {
if (PatchCPUID(kernelData, &StrCpuid1_snowLeo[0], sizeof(StrCpuid1_snowLeo), &TigLeoSLSearchModel[0],
&TigLeoSLSearchExt[0], &TigLeoSLReplaceModel[0], &TigLeoSLReplaceModel[0],
sizeof(TigLeoSLSearchModel), Entry)) {
DBG_RT(Entry, "...done!\n");
return;
}
@ -1817,10 +1824,17 @@ KernelAndKextPatcherInit(IN LOADER_ENTRY *Entry)
}
// Find kernel Mach-O header:
// for 10.4 - 10.5: 0x00111000
// for 10.6 - 10.7: 0x00200000
// for ML: bootArgs2->kslide + 0x00200000
// for older versions: just 0x00200000
// for AptioFix booting - it's always at KernelRelocBase + 0x00200000
UINT64 os_version = AsciiOSVersionToUint64(Entry->OSVersion);
if (os_version < AsciiOSVersionToUint64("10.6")) {
KernelData = (VOID*)(UINTN)(KernelSlide + KernelRelocBase + 0x00111000);
} else {
KernelData = (VOID*)(UINTN)(KernelSlide + KernelRelocBase + 0x00200000);
}
// check that it is Mach-O header and detect architecture
if(MACH_GET_MAGIC(KernelData) == MH_MAGIC || MACH_GET_MAGIC(KernelData) == MH_CIGAM) {