mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-11-27 12:15:19 +01:00
shift symbolic table
Signed-off-by: SergeySlice <sergey.slice@gmail.com>
This commit is contained in:
SergeySlice
parent
df946b75f4
commit
bfe7db9208
@ -125,6 +125,7 @@ struct mach_header_64 {
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#define MH_DSYM 0xa /* companion file with only debug */
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/* sections */
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#define MH_KEXT_BUNDLE 0xb /* x86_64 kexts */
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#define MH_KEXT_CACHE 0xc //???
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/* Constants for the flags field of the mach_header */
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#define MH_NOUNDEFS 0x1 /* the object file has no undefined
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@ -18,7 +18,7 @@
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//#include "sse3_5_patcher.h"
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#ifndef DEBUG_ALL
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#define KERNEL_DEBUG 0
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#define KERNEL_DEBUG 1
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#else
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#define KERNEL_DEBUG DEBUG_ALL
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#endif
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@ -85,7 +85,7 @@ EFI_STATUS LOADER_ENTRY::getVTable()
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//00FFFFFF FF0FFFFF 00000000 FFFFFFFF
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// INT32 Tabble = FindBin(KernelData, 0x5000000, vtableSur, 8);
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INT32 NTabble = FindBin(KernelData, 0x2000000, (const UINT8 *)ctor_used, (UINT32)strlen(ctor_used));
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INT32 NTabble = FindBin(KernelData, KERNEL_MAX_SIZE, (const UINT8 *)ctor_used, (UINT32)strlen(ctor_used));
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if (NTabble < 0) {
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return EFI_NOT_FOUND;
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}
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@ -94,10 +94,10 @@ EFI_STATUS LOADER_ENTRY::getVTable()
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// NTabble -=4;
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DBG_RT("LinkAdr=%x Tabble=%x\n",LinkAdr, NTabble);
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// DBG("LinkAdr=%x NTabble=%x Tabble=%x\n",LinkAdr, NTabble, Tabble);
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SEGMENT *LinkSeg = (SEGMENT*)&KernelData[LinkAdr];
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AddrVtable = LinkSeg->AddrVtable;
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SizeVtable = LinkSeg->SizeVtable;
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NamesTable = LinkSeg->AddrNames;
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// SEGMENT *LinkSeg = (SEGMENT*)&KernelData[LinkAdr];
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// AddrVtable = LinkSeg->AddrVtable;
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// SizeVtable = LinkSeg->SizeVtable;
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// NamesTable = LinkSeg->AddrNames;
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//TODO find an origin of the shift
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shift = NTabble - NamesTable;
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// DBG_RT("AddrVtable=%x Size=%x AddrNames=%x shift=%x\n", AddrVtable, SizeVtable, NamesTable, shift);
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@ -105,7 +105,8 @@ EFI_STATUS LOADER_ENTRY::getVTable()
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AddrVtable += shift;
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// AddrVtable = Tabble;
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DBG("AddrVtable=%x Size=%x AddrNames=%x shift=%x\n", AddrVtable, SizeVtable, NamesTable, shift);
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SegVAddr = FindBin(KernelData, 0x600, (const UINT8 *)kTextSegment, (UINT32)strlen(kTextSegment));
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SegVAddr = FindBin(KernelData+KernelOffset, 0x600, (const UINT8 *)kTextSegment, (UINT32)strlen(kTextSegment));
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SegVAddr += KernelOffset;
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DBG("SegVAddr=0x%x\n", SegVAddr);
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return EFI_SUCCESS;
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}
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@ -161,6 +162,7 @@ UINTN LOADER_ENTRY::searchProcInDriver(UINT8 * driver, UINT32 driverLen, const c
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break;
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case ID_SEG_KLD:
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case ID_SEG_KLD2:
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case ID_SEG_KLD3:
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lSegVAddr = FindBin(driver, 0x2000, (const UINT8 *)kKldSegment, (UINT32)strlen(kKldSegment));
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break;
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// case ID_SEC_BSS:
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@ -1909,10 +1911,11 @@ VOID LOADER_ENTRY::Get_PreLink()
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UINT32 ncmds, cmdsize;
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UINT32 binaryIndex;
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UINTN cnt;
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UINT8* binary = (UINT8*)KernelData;
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UINT8* binary = &KernelData[KernelOffset];
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struct load_command *loadCommand;
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struct segment_command *segCmd;
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struct segment_command_64 *segCmd64;
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struct symtab_command *symCmd;
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if (is64BitKernel) {
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@ -1928,7 +1931,7 @@ VOID LOADER_ENTRY::Get_PreLink()
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cmdsize = loadCommand->cmdsize;
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switch (loadCommand->cmd) {
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case LC_SEGMENT_64:
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case LC_SEGMENT_64: //19
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segCmd64 = (struct segment_command_64 *)loadCommand;
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//segn = (UINT32)(UINTN)segCmd64->segname;
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if ((segCmd64->segname[2] != 'R') || (segCmd64->segname[3] != 'E')) {
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@ -2058,6 +2061,21 @@ VOID LOADER_ENTRY::Get_PreLink()
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}
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}
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break;
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case LC_SYMTAB:
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symCmd = (struct symtab_command *)loadCommand;
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// struct symtab_command {
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// uint32_t cmd; /* LC_SYMTAB == 2 */
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// uint32_t cmdsize; /* sizeof(struct symtab_command) */
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// uint32_t symoff; /* symbol table offset */
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// uint32_t nsyms; /* number of symbol table entries */
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// uint32_t stroff; /* string table offset */
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// uint32_t strsize; /* string table size in bytes */
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// };
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AddrVtable = symCmd->symoff;
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SizeVtable = symCmd->nsyms;
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NamesTable = symCmd->stroff;
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break;
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default:
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break;
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@ -2317,7 +2335,14 @@ LOADER_ENTRY::KernelAndKextPatcherInit()
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is64BitKernel = FALSE;
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} else if (MACH_GET_MAGIC(KernelData) == MH_MAGIC_64 || MACH_GET_MAGIC(KernelData) == MH_CIGAM_64) {
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DBG_RT( "Found 64 bit kernel at 0x%llx\n", (UINTN)KernelData);
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DBG_RT("text section is: %s\n", (const char*)&KernelData[0x28]);
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// DBG_RT("text section is: %s\n", (const char*)&KernelData[0x28]);
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KernelOffset = 0;
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while (KernelOffset < KERNEL_MAX_SIZE) {
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KernelOffset += 4;
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if ((KernelData[KernelOffset + 0x0C] == MH_EXECUTE) && (MACH_GET_MAGIC(KernelData) == MH_MAGIC_64 )) {
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break;
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}
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}
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is64BitKernel = TRUE;
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} else {
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// not valid Mach-O header - exiting
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@ -2328,7 +2353,7 @@ LOADER_ENTRY::KernelAndKextPatcherInit()
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// find __PRELINK_TEXT and __PRELINK_INFO
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Get_PreLink();
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/*
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for (UINTN i=0x00200000; i<0x30000000; i+=4) {
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UINT32 *KD = (UINT32 *)i;
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if ((KD[0] == MH_MAGIC_64) && (KD[0x0a] == 0x45545F5F)){
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@ -2339,7 +2364,7 @@ LOADER_ENTRY::KernelAndKextPatcherInit()
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break;
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}
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}
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*/
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if (EFI_ERROR(getVTable())) {
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DBG_RT("error getting vtable: \n");
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}
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@ -57,6 +57,7 @@ const char kDataSection[] = "__data";
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#define ID_SEG_DATA_CONST 0x110f
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#define ID_SEG_KLD 0x180f
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#define ID_SEG_KLD2 0x1a0f
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#define ID_SEG_KLD3 0x210f
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const char ctor_used[] = ".constructors_used";
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@ -3,7 +3,7 @@
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#include "DataHubCpu.h"
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#ifndef DEBUG_ALL
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#define KEXT_INJECT_DEBUG 0
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#define KEXT_INJECT_DEBUG 2
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#else
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#define KEXT_INJECT_DEBUG DEBUG_ALL
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#endif
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@ -370,6 +370,7 @@ class REFIT_ABSTRACT_MENU_ENTRY
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BOOLEAN isKernelcache;
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BOOLEAN is64BitKernel;
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UINT32 KernelSlide;
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UINT32 KernelOffset;
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// notes:
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// - 64bit segCmd64->vmaddr is 0xffffff80xxxxxxxx and we are taking
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// only lower 32bit part into PrelinkTextAddr
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@ -398,7 +399,7 @@ class REFIT_ABSTRACT_MENU_ENTRY
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CustomBoot(0), KernelAndKextPatches(0), Settings(0), KernelData(0),
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AddrVtable(0), SizeVtable(0), NamesTable(0), shift(0),
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PatcherInited(false), gSNBEAICPUFixRequire(false), gBDWEIOPCIFixRequire(false), isKernelcache(false), is64BitKernel(false),
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KernelSlide(0), PrelinkTextLoadCmdAddr(0), PrelinkTextAddr(0), PrelinkTextSize(0),
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KernelSlide(0), KernelOffset(0), PrelinkTextLoadCmdAddr(0), PrelinkTextAddr(0), PrelinkTextSize(0),
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PrelinkInfoLoadCmdAddr(0), PrelinkInfoAddr(0), PrelinkInfoSize(0),
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KernelRelocBase(0), bootArgs1(0), bootArgs2(0), dtRoot(0), dtLength(0)
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{};
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