src/disassembler/llvm/LLVMDisassembler.cxx

   1 #include "disassembler/Instruction.hxx"
   2 #include "disassembler/llvm/LLVMDisassembler.hxx"
   3 #include "core/InformationManager.hxx"
   4 #include "core/Function.hxx"
   5 #include "core/BasicBlock.hxx"
   6 #include <boost/algorithm/string.hpp>
   7
   8 #include <stack>
   9 #include <algorithm>
  10 #include <cassert>
  11
  12 using namespace llvm;
  13 using namespace llvm::object;
  14 using std::error_code;
  15
  16 namespace {
  17         class COFFT {
  18
  19         };
  20
  21         class MACHOT {
  22
  23         };
  24 }
  25
  26 /*
  27  *
  28  */
  29 Disassembler * createLLVMDisassembler(const std::string& filename, InformationManager* manager) {
  30         if (filename == "")
  31                 return NULL;
  32
  33         std::unique_ptr<Binary> o;
  34         o.reset(createBinary(filename).get());
  35         Binary * op = o.release();
  36
  37         // ELFType<endian, maxalign, 64bit>
  38         if (ELF32LEObjectFile * object = dyn_cast<ELF32LEObjectFile>(op)) {
  39                 return new LLVMDisassembler<ELFType<support::little, 2, false>>(filename, manager, object);
  40         }
  41         if (ELF64LEObjectFile * object = dyn_cast<ELF64LEObjectFile>(op)) {
  42                 return new LLVMDisassembler<ELFType<support::little, 2, true>>(filename, manager, object);
  43         }
  44         if (ELF32BEObjectFile * object = dyn_cast<ELF32BEObjectFile>(op)) {
  45                 return new LLVMDisassembler<ELFType<support::big, 2, false>>(filename, manager, object);
  46         }
  47         if (ELF64BEObjectFile * object = dyn_cast<ELF64BEObjectFile>(op)) {
  48                 return new LLVMDisassembler<ELFType<support::big, 2, true>>(filename, manager, object);
  49         }
  50         if (COFFObjectFile * object = dyn_cast<COFFObjectFile>(op)) {
  51                 return new LLVMDisassembler<COFFT>(filename, manager, object);
  52         }
  53         if (MachOObjectFile * object = dyn_cast<MachOObjectFile>(op)) {
  54                 return new LLVMDisassembler<MACHOT>(filename, manager, object);
  55         }
  56
  57         return NULL;
  58 }
  59
  60 /*
  61  * TODO: fallback code falls die Datei kein ELF/PE/COFF/MacO/.. binary
  62  * ist sondern z.B. einfach nur Instruktionen oder ein Bootsektor oder
  63  * foo
  64  */
  65 template <typename ELFT>
  66 LLVMDisassembler<ELFT>::LLVMDisassembler(const std::string& filename,
  67                                          InformationManager* manager,
  68                                          ObjectFile* file)
  69         : Disassembler()
  70         , logger(log4cxx::Logger::getLogger("disassembler.LLVMDisassembler"))
  71         , triple("unknown-unknown-unknown")
  72         , manager(manager)
  73 {
  74         LOG4CXX_DEBUG(logger, "Handling file " << filename);
  75
  76         if (!file) {
  77                 auto result = createBinary(filename);
  78
  79                 error_code ec;
  80                 if ((ec = result.getError())) {
  81                         LOG4CXX_ERROR(logger, "Failed to load Binary" << ec.message());
  82                         binary = NULL;
  83                         return;
  84                 }
  85
  86                 binary.reset(result.get());
  87
  88                 o = dyn_cast<ObjectFile>(binary.get());
  89         } else {
  90                 o = file;
  91                 binary.reset(file);
  92         }
  93
  94         triple.setArch(Triple::ArchType(o->getArch()));
  95         std::string tripleName(triple.getTriple());
  96
  97         LOG4CXX_INFO(logger, "Architecture " << tripleName);
  98
  99
 100         std::string es;
 101         target = TargetRegistry::lookupTarget("", triple, es);
 102         if (!target) {
 103                 LOG4CXX_ERROR(logger, es);
 104                 return;
 105         }
 106
 107         LOG4CXX_INFO(logger, "Target " << target->getName());
 108
 109         MRI.reset(target->createMCRegInfo(tripleName));
 110         if (!MRI) {
 111                 LOG4CXX_ERROR(logger, "no register info for target " << tripleName);
 112                 return;
 113         }
 114
 115         // Set up disassembler.
 116         AsmInfo.reset(target->createMCAsmInfo(*MRI, tripleName));
 117         if (!AsmInfo) {
 118                 LOG4CXX_ERROR(logger, "no assembly info for target " << tripleName);
 119                 return;
 120         }
 121
 122         STI.reset(target->createMCSubtargetInfo(tripleName, "", ""));
 123         if (!STI) {
 124                 LOG4CXX_ERROR(logger, "no subtarget info for target " << tripleName);
 125                 return;
 126         }
 127
 128         MII.reset(target->createMCInstrInfo());
 129         if (!MII) {
 130                 LOG4CXX_ERROR(logger, "no instruction info for target " << tripleName);
 131                 return;
 132         }
 133
 134         MOFI.reset(new MCObjectFileInfo);
 135         MCContext Ctx(AsmInfo.get(), MRI.get(), MOFI.get());
 136
 137         DisAsm.reset(target->createMCDisassembler(*STI, Ctx));
 138         if (!DisAsm) {
 139                 LOG4CXX_ERROR(logger, "no disassembler for target " << tripleName);
 140                 return;
 141         }
 142         RelInfo.reset(
 143                 target->createMCRelocationInfo(tripleName, Ctx));
 144         if (RelInfo) {
 145                 // Symzer.reset(
 146                 //      MCObjectSymbolizer::createObjectSymbolizer(Ctx, std::move(RelInfo), o));
 147                 // if (Symzer)
 148                 //      DisAsm->setSymbolizer(std::move(Symzer));
 149         }
 150         RelInfo.release();
 151         Symzer.release();
 152
 153         MIA.reset(target->createMCInstrAnalysis(MII.get()));
 154         if (!MIA) {
 155                 LOG4CXX_ERROR(logger, "no instruction analysis for target " << tripleName);
 156                 return;
 157         }
 158
 159         int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
 160         IP.reset(target->createMCInstPrinter(AsmPrinterVariant, *AsmInfo, *MII, *MRI, *STI));
 161         if (!IP) {
 162                 LOG4CXX_ERROR(logger, "no instruction printer for target " << tripleName);
 163                 return;
 164         }
 165
 166         IP->setPrintImmHex(llvm::HexStyle::C);
 167         IP->setPrintImmHex(true);
 168
 169         std::unique_ptr<MCObjectDisassembler> OD(
 170                 new MCObjectDisassembler(*o, *DisAsm, *MIA));
 171         Mod.reset(OD->buildModule(false));
 172
 173         readSections();
 174 }
 175
 176 template <typename ELFT>
 177 void LLVMDisassembler<ELFT>::start() {
 178         readSymbols();
 179         disassemble();
 180         readDynamicSymbols();
 181 }
 182
 183 template <typename ELFT>
 184 LLVMDisassembler<ELFT>::~LLVMDisassembler() {}
 185
 186 template <typename ELFT>
 187 Function* LLVMDisassembler<ELFT>::disassembleFunctionAt(uint64_t address, const std::string& name) {
 188         Function * function;
 189         SectionRef text_section = getTextSection();
 190         uint64_t base_address, size;
 191         text_section.getAddress(base_address);
 192         text_section.getSize(size);
 193
 194         if (address < base_address ||
 195             address >= base_address + size) {
 196                 return NULL;
 197         }
 198
 199         if (NULL == (function = manager->getFunction(address))) {
 200
 201                 if (name == "") {
 202                         std::stringstream s;
 203                         s << "<Unnamed 0x" << std::hex << address << ">";
 204                         function = manager->newFunction(address);
 205                         function->setName(s.str());
 206                 } else {
 207                         function = manager->newFunction(address);
 208                         function->setName(name);
 209                 }
 210                 disassembleFunction(function);
 211         }
 212
 213         return function;
 214 }
 215
 216 template <typename ELFT>
 217 void LLVMDisassembler<ELFT>::disassembleFunction(Function* function) {
 218         std::vector<uint64_t> called_functions;
 219         std::stack<BasicBlock*> remaining_blocks;
 220         /* TODO:
 221          * Do all blocks get added properly? We should take care to remove
 222          * the other ones at the end of the function!
 223          */
 224         std::map<uint64_t, BasicBlock*> new_blocks;
 225         SectionRef text_section = getTextSection();
 226         StringRef bytes;
 227         text_section.getContents(bytes);
 228         StringRefMemoryObject ref(bytes);
 229
 230         LOG4CXX_DEBUG(logger, "Handling function " << function->getName());
 231
 232         BasicBlock * block = manager->newBasicBlock(function->getStartAddress());
 233         remaining_blocks.push(block);
 234         new_blocks.insert(std::make_pair(block->getStartAddress(), block));
 235         function->addBasicBlock(block);
 236
 237         uint64_t base_address, size;
 238         text_section.getAddress(base_address);
 239         text_section.getSize(size);
 240         LOG4CXX_DEBUG(logger, "Text section at " << std::hex << base_address << " with size " << size);
 241
 242         while (remaining_blocks.size()) {
 243                 BasicBlock * current_block = remaining_blocks.top();
 244                 remaining_blocks.pop();
 245
 246                 LOG4CXX_DEBUG(logger, "Handling Block starting at " << std::hex
 247                               << current_block->getStartAddress());
 248
 249                 uint64_t inst_size;
 250                 uint64_t current_address = current_block->getStartAddress() - base_address;
 251                 while(true) {
 252                         MCInst inst;
 253                         std::string buf;
 254                         llvm::raw_string_ostream s(buf);
 255
 256                         if(llvm::MCDisassembler::Success ==
 257                            DisAsm->getInstruction(inst, inst_size, ref, current_address, nulls(), nulls())) {
 258                                 uint64_t jmptarget;
 259
 260                                 if (MIA->evaluateBranch(inst, current_address, inst_size, jmptarget)) {
 261                                         jmptarget += base_address;
 262                                         if (!MIA->isIndirectBranch(inst)) {
 263                                                 if (MIA->isCall(inst)) {
 264                                                         if (NULL == manager->getFunction(jmptarget))
 265                                                                 called_functions.push_back(jmptarget);
 266                                                 } else {
 267                                                         current_block->setNextBlock(0, jmptarget);
 268                                                         if (new_blocks.find(jmptarget) == new_blocks.end()) {
 269                                                                 BasicBlock * block = manager->newBasicBlock(jmptarget);
 270                                                                 assert(block);
 271                                                                 new_blocks.insert(std::make_pair(block->getStartAddress(), block));
 272                                                                 function->addBasicBlock(block);
 273                                                                 remaining_blocks.push(block);
 274                                                         } else {
 275                                                                 LOG4CXX_DEBUG(logger, "Reusing Block starting at " << std::hex
 276                                                                               << current_block->getStartAddress());
 277                                                                 function->addBasicBlock(new_blocks.find(jmptarget)->second);
 278                                                         }
 279                                                         if (MIA->isConditionalBranch(inst)) {
 280                                                                 jmptarget = base_address + current_address + inst_size;
 281                                                                 current_block->setNextBlock(1, jmptarget);
 282                                                                 if (new_blocks.find(jmptarget) == new_blocks.end()) {
 283                                                                         BasicBlock * block = manager->newBasicBlock(jmptarget);
 284                                                                         assert(block);
 285                                                                         new_blocks.insert(std::make_pair(block->getStartAddress(), block));
 286                                                                         function->addBasicBlock(block);
 287                                                                         remaining_blocks.push(block);
 288                                                                 } else {
 289                                                                         LOG4CXX_DEBUG(logger, "Reusing Block starting at " << std::hex
 290                                                                                       << current_block->getStartAddress());
 291                                                                         function->addBasicBlock(new_blocks.find(jmptarget)->second);
 292                                                                 }
 293                                                         }
 294                                                 }
 295                                         }
 296                                 }
 297                         } else {
 298                                 inst_size = 0;
 299                         }
 300
 301
 302                         if (inst_size == 0 || MIA->isTerminator(inst) || MIA->isBranch(inst)) {
 303                                 current_block->setEndAddress(current_address + base_address + inst_size);
 304                                 LOG4CXX_DEBUG(logger, "Finished Block at " << std::hex <<
 305                                               current_block->getEndAddress());
 306                                 break;
 307                         }
 308                         current_address += inst_size;
 309                 }
 310         }
 311         splitBlocks(function);
 312         LOG4CXX_DEBUG(logger, "Finished function " << function->getName());
 313         manager->finishFunction(function);
 314         for (uint64_t address : called_functions)
 315                 disassembleFunctionAt(address);
 316 }
 317
 318 template <typename ELFT>
 319 void LLVMDisassembler<ELFT>::disassemble() {
 320         SectionRef text_section = getTextSection();
 321         std::vector<Function*> remaining_functions;
 322
 323         // Assume all function symbols actually start a real function
 324         for (auto x = symbols.begin(); x != symbols.end(); ++x) {
 325                 uint64_t result;
 326                 bool contains;
 327                 SymbolRef::Type symbol_type;
 328
 329
 330                 if (text_section.containsSymbol(x->second, contains) || !contains)
 331                         continue;
 332
 333                 if (x->second.getType(symbol_type)
 334                     || SymbolRef::ST_Function != symbol_type)
 335                         continue;
 336
 337                 if (!x->second.getAddress(result)) {
 338                         Function * fun = manager->newFunction(result);
 339                         if (fun) {
 340                                 fun->setName(x->first);
 341                                 remaining_functions.push_back(fun);
 342                                 LOG4CXX_DEBUG(logger, "Disasembling " << x->first);
 343                         } else {
 344                                 LOG4CXX_DEBUG(logger, "Function at " << std::hex << result
 345                                               << " already disassembled as " << manager->getFunction(result)->getName());
 346                         }
 347                 }
 348         }
 349
 350         for (Function* function : remaining_functions) {
 351                 disassembleFunction(function);
 352                 manager->finishFunction(function);
 353         }
 354
 355         if (binary->isELF()) {
 356                 uint64_t _entryAddress = entryAddress();
 357                 LOG4CXX_DEBUG(logger, "Adding entryAddress at: " << std::hex << _entryAddress);
 358                 std::stringstream s;
 359                 s << "<_start 0x" << std::hex << _entryAddress << ">";
 360
 361                 disassembleFunctionAt(_entryAddress, s.str());
 362         }
 363
 364         if (!manager->hasFunctions()) {
 365                 uint64_t text_entry;
 366                 text_section.getAddress(text_entry);
 367                 LOG4CXX_INFO(logger, "No Symbols found, starting at the beginning of the text segment");
 368                 disassembleFunctionAt(text_entry);
 369         }
 370 }
 371
 372 template <>
 373 uint64_t LLVMDisassembler<COFFT>::entryAddress() {
 374         const auto coffobject = dyn_cast<COFFObjectFile>(o);
 375         const struct pe32_header* pe32_header;
 376         const struct pe32plus_header* pe32plus_header;
 377
 378         coffobject->getPE32PlusHeader(pe32plus_header);
 379
 380         if (pe32plus_header) {
 381                 return pe32plus_header->AddressOfEntryPoint;
 382         } else {
 383                 coffobject->getPE32Header(pe32_header);
 384                 return pe32_header->AddressOfEntryPoint;
 385         }
 386 }
 387
 388 template<>
 389 uint64_t LLVMDisassembler<MACHOT>::entryAddress() {
 390         // TODO
 391         return 0;
 392 }
 393
 394 template <typename ELFT>
 395 uint64_t LLVMDisassembler<ELFT>::entryAddress() {
 396         const auto elffile = dyn_cast<ELFObjectFile<ELFT>>(o)->getELFFile();
 397         const auto * header = elffile->getHeader();
 398
 399         return header->e_entry;
 400 }
 401
 402 template <typename ELFT>
 403 void LLVMDisassembler<ELFT>::splitBlocks(Function* function) {
 404         SectionRef text_section = getTextSection();
 405         StringRef bytes;
 406         text_section.getContents(bytes);
 407         StringRefMemoryObject ref(bytes);
 408
 409         LOG4CXX_DEBUG(logger, "Splitting Blocks in Function " << function->getName());
 410         // Split blocks where jumps are going inside the block
 411         for (auto it = function->blocks().begin();
 412              it != function->blocks().end();
 413              ++it) {
 414                 BasicBlock * current_block = it->second;
 415                 if (current_block->getEndAddress() == 0) {
 416                         LOG4CXX_ERROR(logger, "UNFINISHED BLOCK " << std::hex << current_block->getStartAddress());
 417                         break;
 418                 }
 419                 uint64_t inst_size;
 420                 uint64_t base_address;
 421                 text_section.getAddress(base_address);
 422                 uint64_t current_address = current_block->getStartAddress() - base_address;
 423                 while(current_block->getEndAddress() - base_address > current_address) {
 424                         MCInst inst;
 425                         std::string buf;
 426                         llvm::raw_string_ostream s(buf);
 427
 428                         if(llvm::MCDisassembler::Success ==
 429                            DisAsm->getInstruction(inst, inst_size, ref, current_address, nulls(), nulls())) {
 430                                 // See if some other block starts here
 431                                 BasicBlock* other = manager->getBasicBlock(current_address
 432                                                                            + inst_size
 433                                                                            + base_address);
 434
 435                                 // Special case, other block starts here but we are at the end anyway
 436                                 if (other != NULL) {
 437                                         uint64_t endaddress = current_address + inst_size + base_address;
 438                                         if (endaddress != current_block->getEndAddress()) {
 439                                                 LOG4CXX_DEBUG(logger, "Shortening block starting at "
 440                                                               << std::hex
 441                                                               << current_block->getStartAddress()
 442                                                               << " now ending at "
 443                                                               << other->getStartAddress());
 444                                                 function->addBasicBlock(other);
 445                                                 current_block->setEndAddress(endaddress);
 446                                                 current_block->setNextBlock(0, other->getStartAddress());
 447                                                 current_block->setNextBlock(1, 0);
 448                                         }
 449                                 }
 450                         } else {
 451                                 inst_size = 1;
 452                         }
 453                         current_address += inst_size;
 454                 }
 455         }
 456 }
 457
 458 template<>
 459 void LLVMDisassembler<COFFT>::readDynamicSymbols() {
 460         //TODO
 461 }
 462
 463 template<>
 464 void LLVMDisassembler<MACHOT>::readDynamicSymbols() {
 465         //TODO
 466 }
 467
 468 template <typename ELFT>
 469 void LLVMDisassembler<ELFT>::readDynamicSymbols() {
 470         const auto elffile = dyn_cast<ELFObjectFile<ELFT>>(o)->getELFFile();
 471         for (auto it = elffile->begin_dynamic_symbols(),
 472                      end = elffile->end_dynamic_symbols();
 473              it != end;
 474              ++it) {
 475                 if (it->getType() == 2) { // Function
 476                         bool is_default;
 477                         // TODO: Error handling
 478                         std::string symbolname = *(elffile->getSymbolName(it));
 479                         std::string symbolversion = *(elffile->getSymbolVersion(nullptr, &*it, is_default));
 480                         // TODO: actually get the symbol address from relocations
 481                         Function* f = manager->newDynamicFunction(0);
 482                         f->setName(symbolname + (is_default? "@@" : "@") + symbolversion);
 483                         manager->finishFunction(f);
 484
 485                         LOG4CXX_DEBUG(logger, "Adding dynamic Symbol " << symbolname << (is_default? "@@" : "@") << symbolversion);
 486                 }
 487         }
 488 }
 489
 490 template <typename ELFT>
 491 void LLVMDisassembler<ELFT>::readSymbols() {
 492         error_code ec;
 493         symbol_iterator si(o->symbol_begin()), se(o->symbol_end());
 494         for (; si != se; ++si) {
 495                 StringRef name;
 496                 if ((ec = si->getName(name))) {
 497                         LOG4CXX_ERROR(logger, ec.message());
 498                         break;
 499                 }
 500                 LOG4CXX_DEBUG(logger, "Added symbol " << name.str());
 501                 symbols.insert(make_pair(name.str(), *si));
 502         }
 503 }
 504
 505 template <typename ELFT>
 506 void LLVMDisassembler<ELFT>::readSections() {
 507         error_code ec;
 508         section_iterator i(o->section_begin()), e(o->section_end());
 509         for (; i != e; ++i) {
 510                 StringRef name;
 511                 if ((ec = i->getName(name))) {
 512                         LOG4CXX_ERROR(logger, ec.message());
 513                         break;
 514                 }
 515                 LOG4CXX_DEBUG(logger, "Added section " << name.str());
 516                 sections.insert(make_pair(name.str(), *i));
 517         }
 518
 519 }
 520
 521 // template <typename ELFT>
 522 // void LLVMDisassembler<ELFT>::forEachFunction(std::function<void (uint64_t, Function*)> callback) {
 523 //      // std::for_each(functions.begin(), functions.end(),
 524 //      //               [&](std::pair<uint64_t, Function*> x) {
 525 //      //                    callback(x.first, x.second);
 526 //      //               });
 527 // }
 528
 529 template <typename ELFT>
 530 std::vector<Instruction> LLVMDisassembler<ELFT>::getInstructions(const BasicBlock *block) {
 531         std::vector<Instruction> result;
 532         SectionRef text_section = getTextSection();
 533         uint64_t base_address;
 534         text_section.getAddress(base_address);
 535         uint64_t current_address = block->getStartAddress() - base_address;
 536         uint64_t end_position = block->getEndAddress() - base_address;
 537
 538         StringRef bytes;
 539         text_section.getContents(bytes);
 540         StringRefMemoryObject ref(bytes);
 541
 542         while (current_address < end_position) {
 543                 uint64_t inst_size;
 544                 MCInst inst;
 545                 std::string buf;
 546                 llvm::raw_string_ostream s(buf);
 547
 548                 if(llvm::MCDisassembler::Success ==
 549                    DisAsm->getInstruction(inst, inst_size, ref, current_address, nulls(), nulls())) {
 550
 551                         uint8_t bytes[inst_size+2];
 552                         ref.readBytes(current_address, inst_size, bytes);
 553
 554                         uint64_t jmptarget;
 555                         std::string ref("");
 556                         IP->printInst(&inst, s, "");
 557                         if (MIA->evaluateBranch(inst, current_address, inst_size, jmptarget)) {
 558                                 std::stringstream stream;
 559                                 if (MIA->isCall(inst))
 560                                         stream << "function:";
 561                                 else
 562                                         stream << "block:";
 563
 564                                 stream << std::hex << (base_address + jmptarget);
 565                                 ref = stream.str();
 566                         }
 567                         result.push_back(Instruction(current_address + base_address, boost::algorithm::trim_copy(s.str()),
 568                                                      std::vector<uint8_t>(bytes, bytes+inst_size), ref));
 569                 } else {
 570                         LOG4CXX_WARN(logger, "Invalid byte at" << std::hex << current_address + base_address);
 571                         uint8_t bytes[1];
 572                         ref.readBytes(current_address, 1, bytes);
 573                         result.push_back(Instruction(current_address + base_address, "Invalid Instruction",
 574                                                      std::vector<uint8_t>(bytes, bytes+1), ""));
 575                         inst_size = 1;
 576                 }
 577
 578                 current_address += inst_size;
 579         }
 580         return result;
 581 }
 582
 583 template <typename ELFT>
 584 void LLVMDisassembler<ELFT>::printEachInstruction(uint64_t start, uint64_t end,
 585                                                   std::function<void (uint8_t*, size_t,
 586                                                                           const std::string&,
 587                                                                           const std::string&)> fun) {
 588         SectionRef text_section = getTextSection();
 589         uint64_t base_address;
 590         text_section.getAddress(base_address);
 591         uint64_t current_address = start - base_address;
 592
 593         StringRef bytes;
 594         text_section.getContents(bytes);
 595         StringRefMemoryObject ref(bytes);
 596
 597         while (current_address < end - base_address) {
 598                 uint64_t inst_size;
 599                 MCInst inst;
 600                 std::string buf;
 601                 llvm::raw_string_ostream s(buf);
 602
 603                 if(llvm::MCDisassembler::Success ==
 604                    DisAsm->getInstruction(inst, inst_size, ref, current_address, nulls(), nulls())) {
 605
 606                         uint8_t bytes[inst_size+2];
 607                         ref.readBytes(current_address, inst_size, bytes);
 608
 609                         uint64_t jmptarget;
 610                         std::string ref("");
 611                         IP->printInst(&inst, s, "");
 612                         if (MIA->evaluateBranch(inst, current_address, inst_size, jmptarget)) {
 613                                 std::stringstream stream;
 614                                 if (MIA->isCall(inst))
 615                                         stream << "function:";
 616                                 else
 617                                         stream << "block:";
 618
 619                                 stream << std::hex << (base_address + jmptarget);
 620                                 ref = stream.str();
 621                         }
 622
 623
 624                         fun(bytes, inst_size, s.str(), ref);
 625                 } else {
 626                         LOG4CXX_WARN(logger, "Invalid byte at" << std::hex << current_address + base_address);
 627                         fun(NULL, 0, "Invalid Byte", "");
 628                         inst_size = 1;
 629                 }
 630
 631                 current_address += inst_size;
 632         }
 633 }
 634
 635 template <typename ELFT>
 636 SectionRef LLVMDisassembler<ELFT>::getTextSection() {
 637         return sections[".text"];
 638 }
 639
 640 template <>
 641 SectionRef LLVMDisassembler<MACHOT>::getTextSection() {
 642         return sections["__text"];
 643 }