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simplify kext allowing patch

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Signed-off-by: SergeySlice <sergey.slice@gmail.com>
This commit is contained in:
SergeySlice 2020-04-29 11:06:44 +03:00
parent 3b75317d14
commit c4357fd984
5 changed files with 49 additions and 20 deletions
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9
MemoryFix/OsxAptioFixDrv/DecodedKernelCheck.c
View File

@ -17,6 +17,7 @@
// monitoring AlocatePages
extern UINT32 gKernelEntry;
#if NOT_USED
typedef struct {
char *segname;
unsigned long vmaddr;
@ -80,7 +81,9 @@ mySegData_t mySegData[] = { // segment, vmaddr, vmsize, filesize, adler32
{0x72, 0x65, 0x61, 0x6c, 0x6c, 0x6f, 0x63, 0x00}
},
};
int mySegDataNum = 12;
//int mySegDataNum = 12;
#endif
//unsigned long rentry = 0x2c3db0;
unsigned long rentryx64 = 0x2b8000;
unsigned long rentry = 0x2b8000;
@ -144,7 +147,7 @@ void PrintSample(unsigned char *sample, int size) {
}
}
/* never used
EFI_STATUS
EFIAPI
CheckDecodedSegment (
@ -203,7 +206,7 @@ CheckDecodedKernel (
Print(L"CheckDecodedKernel Status=%r\n");
return Status;
}
*/
VOID

2
MemoryFix/OsxAptioFixDrv/DecodedKernelCheck.h
View File

@ -9,5 +9,5 @@
extern EFI_PHYSICAL_ADDRESS gRelocBase;
EFI_STATUS EFIAPI CheckDecodedKernel (VOID);
//EFI_STATUS EFIAPI CheckDecodedKernel (VOID);
VOID EFIAPI DumpStack (UINT64 RSP);

38
rEFIt_UEFI/Platform/kernel_patcher.cpp
View File

@ -85,12 +85,6 @@ UINTN searchProc(unsigned char * kernel, UINTN kernelSize, const char *procedure
if (!procedure) {
return 0;
}
INT32 TextAdr = FindBin(kernel, 0x60, (const UINT8 *)kTextSegment, (UINT32)strlen(kTextSegment));
if (TextAdr == -1) {
TextAdr = 0x28; //ugly hack, not really needed
}
SEGMENT *TextSeg = (SEGMENT*)&kernel[TextAdr];
UINT64 Absolut = TextSeg->SegAddress;
INT32 LinkAdr = FindBin(kernel, 0x1000, (const UINT8 *)kLinkEditSegment, (UINT32)strlen(kLinkEditSegment));
if (LinkAdr == -1) {
@ -102,7 +96,6 @@ UINTN searchProc(unsigned char * kernel, UINTN kernelSize, const char *procedure
const char* Names = (const char*)(&kernel[LinkSeg->AddrNames]);
VTABLE * vArray = (VTABLE*)(&kernel[AddrVtable]);
//search for the name
// UINTN nameLen = strlen(procedure);
size_t i;
bool found = false;
for (i=0; i<SizeVtable; ++i) {
@ -115,19 +108,38 @@ UINTN searchProc(unsigned char * kernel, UINTN kernelSize, const char *procedure
if (!found) {
return 0;
}
UINT64 procAddr = vArray[i].ProcAddr - Absolut;
if (vArray[i].Attr == 0x1a0f) {
procAddr += 0x9e000;
} else if (vArray[i].Attr == 0x180f ) {
procAddr -= 0x120000;
INT32 SegVAddr;
switch (vArray[i].Seg) {
case SEG_TEXT:
SegVAddr = FindBin(kernel, 0x60, (const UINT8 *)kTextSegment, (UINT32)strlen(kTextSegment));
break;
case SEG_DATA:
SegVAddr = FindBin(kernel, 0x600, (const UINT8 *)kDataSegment, (UINT32)strlen(kDataSegment));
break;
case SEG_DATA_CONST:
SegVAddr = FindBin(kernel, 0x1000, (const UINT8 *)kDataConstSegment, (UINT32)strlen(kDataConstSegment));
break;
case SEG_KLD:
case SEG_KLD2:
SegVAddr = FindBin(kernel, 0x1000, (const UINT8 *)kKldSegment, (UINT32)strlen(kKldSegment));
break;
default:
// DBG_RT(Entry, "unknown segment %x \n", vArray[i].Seg);
return 0; //
}
SEGMENT *TextSeg = (SEGMENT*)&kernel[SegVAddr];
UINT64 Absolut = TextSeg->SegAddress;
UINT64 FileOff = TextSeg->fileoff;
UINT64 procAddr = vArray[i].ProcAddr - Absolut + FileOff;
UINT64 prevAddr;
if (i == 0) {
prevAddr = Absolut;
} else {
prevAddr = vArray[i-1].ProcAddr;
}
*procLen = vArray[i].ProcAddr - prevAddr;
*procLen = vArray[i].ProcAddr - prevAddr; //never worked
return procAddr;
}

12
rEFIt_UEFI/Platform/kernel_patcher.h
View File

@ -39,8 +39,16 @@
#define kPrelinkInfoSegment "__PRELINK_INFO"
#define kPrelinkInfoSection "__info"
#define kTextSegment "__TEXT"
#define kLinkEditSegment "__LINKEDIT"
#define kTextSegment "__TEXT"
#define SEG_TEXT 0x010f
#define kDataSegment "__DATA"
#define SEG_DATA 0x0f0f
#define kDataConstSegment "__DATA_CONST"
#define SEG_DATA_CONST 0x110f
#define kKldSegment "__KLD"
#define SEG_KLD 0x180f
#define SEG_KLD2 0x1a0f
#define kPrelinkBundlePathKey "_PrelinkBundlePath"
#define kPrelinkExecutableRelativePathKey "_PrelinkExecutableRelativePath"
@ -76,7 +84,7 @@ typedef struct _DeviceTreeBuffer {
typedef struct VTABLE {
UINT32 NameOffset;
UINT32 Attr;
UINT32 Seg;
UINT64 ProcAddr;
} VTABLE;

8
rEFIt_UEFI/Platform/kext_inject.cpp
View File

@ -954,6 +954,7 @@ VOID EFIAPI KernelBooterExtensionsPatch(IN UINT8 *Kernel, LOADER_ENTRY *Entry)
DBG_RT(Entry, "==> kernel Lion X64: %llu replaces done.\n", Num);
} else {
// EXT - load extra kexts besides kernelcache.
#if OLD_EXTRA_KEXT_PATCH
for (i = 0; i < 0x1000000; i++) {
// 01 00 31 FF BE 14 00 05
if (Kernel[i+0] == 0x01 && Kernel[i+1] == 0x00 && Kernel[i+2] == 0x31 &&
@ -987,7 +988,12 @@ VOID EFIAPI KernelBooterExtensionsPatch(IN UINT8 *Kernel, LOADER_ENTRY *Entry)
Kernel[patchLocation1 + i] = 0x90;
}
}
#else
UNITN procLocation = searchProc(Kernel, 0x1000000, "readStartupExtensions", 0x100);
const UINT8 * findJmp = {0xEB, 0x05};
const UINT8 * patchJmp = {0x90, 0x90};
applyKernPatch(Kernel+procLocation, findJmp, 2, patchJmp, "load kexts");
#endif
// SIP - bypass kext check by System Integrity Protection.
for (i = 0; i < 0x1000000; i++) {
// 45 31 FF 41 XX 01 00 00 DC 48