RuntimeDyld.cpp revision 261991
1//===-- RuntimeDyld.cpp - Run-time dynamic linker for MC-JIT ----*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// Implementation of the MC-JIT runtime dynamic linker. 11// 12//===----------------------------------------------------------------------===// 13 14#define DEBUG_TYPE "dyld" 15#include "llvm/ExecutionEngine/RuntimeDyld.h" 16#include "JITRegistrar.h" 17#include "ObjectImageCommon.h" 18#include "RuntimeDyldELF.h" 19#include "RuntimeDyldImpl.h" 20#include "RuntimeDyldMachO.h" 21#include "llvm/Support/FileSystem.h" 22#include "llvm/Support/MathExtras.h" 23#include "llvm/Support/MutexGuard.h" 24#include "llvm/Object/ELF.h" 25 26using namespace llvm; 27using namespace llvm::object; 28 29// Empty out-of-line virtual destructor as the key function. 30RuntimeDyldImpl::~RuntimeDyldImpl() {} 31 32// Pin the JITRegistrar's and ObjectImage*'s vtables to this file. 33void JITRegistrar::anchor() {} 34void ObjectImage::anchor() {} 35void ObjectImageCommon::anchor() {} 36 37namespace llvm { 38 39void RuntimeDyldImpl::registerEHFrames() { 40} 41 42void RuntimeDyldImpl::deregisterEHFrames() { 43} 44 45// Resolve the relocations for all symbols we currently know about. 46void RuntimeDyldImpl::resolveRelocations() { 47 MutexGuard locked(lock); 48 49 // First, resolve relocations associated with external symbols. 50 resolveExternalSymbols(); 51 52 // Just iterate over the sections we have and resolve all the relocations 53 // in them. Gross overkill, but it gets the job done. 54 for (int i = 0, e = Sections.size(); i != e; ++i) { 55 // The Section here (Sections[i]) refers to the section in which the 56 // symbol for the relocation is located. The SectionID in the relocation 57 // entry provides the section to which the relocation will be applied. 58 uint64_t Addr = Sections[i].LoadAddress; 59 DEBUG(dbgs() << "Resolving relocations Section #" << i 60 << "\t" << format("%p", (uint8_t *)Addr) 61 << "\n"); 62 resolveRelocationList(Relocations[i], Addr); 63 Relocations.erase(i); 64 } 65} 66 67void RuntimeDyldImpl::mapSectionAddress(const void *LocalAddress, 68 uint64_t TargetAddress) { 69 MutexGuard locked(lock); 70 for (unsigned i = 0, e = Sections.size(); i != e; ++i) { 71 if (Sections[i].Address == LocalAddress) { 72 reassignSectionAddress(i, TargetAddress); 73 return; 74 } 75 } 76 llvm_unreachable("Attempting to remap address of unknown section!"); 77} 78 79// Subclasses can implement this method to create specialized image instances. 80// The caller owns the pointer that is returned. 81ObjectImage *RuntimeDyldImpl::createObjectImage(ObjectBuffer *InputBuffer) { 82 return new ObjectImageCommon(InputBuffer); 83} 84 85ObjectImage *RuntimeDyldImpl::loadObject(ObjectBuffer *InputBuffer) { 86 MutexGuard locked(lock); 87 88 OwningPtr<ObjectImage> obj(createObjectImage(InputBuffer)); 89 if (!obj) 90 report_fatal_error("Unable to create object image from memory buffer!"); 91 92 // Save information about our target 93 Arch = (Triple::ArchType)obj->getArch(); 94 IsTargetLittleEndian = obj->getObjectFile()->isLittleEndian(); 95 96 // Symbols found in this object 97 StringMap<SymbolLoc> LocalSymbols; 98 // Used sections from the object file 99 ObjSectionToIDMap LocalSections; 100 101 // Common symbols requiring allocation, with their sizes and alignments 102 CommonSymbolMap CommonSymbols; 103 // Maximum required total memory to allocate all common symbols 104 uint64_t CommonSize = 0; 105 106 error_code err; 107 // Parse symbols 108 DEBUG(dbgs() << "Parse symbols:\n"); 109 for (symbol_iterator i = obj->begin_symbols(), e = obj->end_symbols(); 110 i != e; i.increment(err)) { 111 Check(err); 112 object::SymbolRef::Type SymType; 113 StringRef Name; 114 Check(i->getType(SymType)); 115 Check(i->getName(Name)); 116 117 uint32_t flags; 118 Check(i->getFlags(flags)); 119 120 bool isCommon = flags & SymbolRef::SF_Common; 121 if (isCommon) { 122 // Add the common symbols to a list. We'll allocate them all below. 123 uint32_t Align; 124 Check(i->getAlignment(Align)); 125 uint64_t Size = 0; 126 Check(i->getSize(Size)); 127 CommonSize += Size + Align; 128 CommonSymbols[*i] = CommonSymbolInfo(Size, Align); 129 } else { 130 if (SymType == object::SymbolRef::ST_Function || 131 SymType == object::SymbolRef::ST_Data || 132 SymType == object::SymbolRef::ST_Unknown) { 133 uint64_t FileOffset; 134 StringRef SectionData; 135 bool IsCode; 136 section_iterator si = obj->end_sections(); 137 Check(i->getFileOffset(FileOffset)); 138 Check(i->getSection(si)); 139 if (si == obj->end_sections()) continue; 140 Check(si->getContents(SectionData)); 141 Check(si->isText(IsCode)); 142 const uint8_t* SymPtr = (const uint8_t*)InputBuffer->getBufferStart() + 143 (uintptr_t)FileOffset; 144 uintptr_t SectOffset = (uintptr_t)(SymPtr - 145 (const uint8_t*)SectionData.begin()); 146 unsigned SectionID = findOrEmitSection(*obj, *si, IsCode, LocalSections); 147 LocalSymbols[Name.data()] = SymbolLoc(SectionID, SectOffset); 148 DEBUG(dbgs() << "\tFileOffset: " << format("%p", (uintptr_t)FileOffset) 149 << " flags: " << flags 150 << " SID: " << SectionID 151 << " Offset: " << format("%p", SectOffset)); 152 GlobalSymbolTable[Name] = SymbolLoc(SectionID, SectOffset); 153 } 154 } 155 DEBUG(dbgs() << "\tType: " << SymType << " Name: " << Name << "\n"); 156 } 157 158 // Allocate common symbols 159 if (CommonSize != 0) 160 emitCommonSymbols(*obj, CommonSymbols, CommonSize, LocalSymbols); 161 162 // Parse and process relocations 163 DEBUG(dbgs() << "Parse relocations:\n"); 164 for (section_iterator si = obj->begin_sections(), 165 se = obj->end_sections(); si != se; si.increment(err)) { 166 Check(err); 167 bool isFirstRelocation = true; 168 unsigned SectionID = 0; 169 StubMap Stubs; 170 section_iterator RelocatedSection = si->getRelocatedSection(); 171 172 for (relocation_iterator i = si->begin_relocations(), 173 e = si->end_relocations(); i != e; i.increment(err)) { 174 Check(err); 175 176 // If it's the first relocation in this section, find its SectionID 177 if (isFirstRelocation) { 178 SectionID = 179 findOrEmitSection(*obj, *RelocatedSection, true, LocalSections); 180 DEBUG(dbgs() << "\tSectionID: " << SectionID << "\n"); 181 isFirstRelocation = false; 182 } 183 184 processRelocationRef(SectionID, *i, *obj, LocalSections, LocalSymbols, 185 Stubs); 186 } 187 } 188 189 // Give the subclasses a chance to tie-up any loose ends. 190 finalizeLoad(LocalSections); 191 192 return obj.take(); 193} 194 195void RuntimeDyldImpl::emitCommonSymbols(ObjectImage &Obj, 196 const CommonSymbolMap &CommonSymbols, 197 uint64_t TotalSize, 198 SymbolTableMap &SymbolTable) { 199 // Allocate memory for the section 200 unsigned SectionID = Sections.size(); 201 uint8_t *Addr = MemMgr->allocateDataSection( 202 TotalSize, sizeof(void*), SectionID, StringRef(), false); 203 if (!Addr) 204 report_fatal_error("Unable to allocate memory for common symbols!"); 205 uint64_t Offset = 0; 206 Sections.push_back(SectionEntry(StringRef(), Addr, TotalSize, 0)); 207 memset(Addr, 0, TotalSize); 208 209 DEBUG(dbgs() << "emitCommonSection SectionID: " << SectionID 210 << " new addr: " << format("%p", Addr) 211 << " DataSize: " << TotalSize 212 << "\n"); 213 214 // Assign the address of each symbol 215 for (CommonSymbolMap::const_iterator it = CommonSymbols.begin(), 216 itEnd = CommonSymbols.end(); it != itEnd; it++) { 217 uint64_t Size = it->second.first; 218 uint64_t Align = it->second.second; 219 StringRef Name; 220 it->first.getName(Name); 221 if (Align) { 222 // This symbol has an alignment requirement. 223 uint64_t AlignOffset = OffsetToAlignment((uint64_t)Addr, Align); 224 Addr += AlignOffset; 225 Offset += AlignOffset; 226 DEBUG(dbgs() << "Allocating common symbol " << Name << " address " << 227 format("%p\n", Addr)); 228 } 229 Obj.updateSymbolAddress(it->first, (uint64_t)Addr); 230 SymbolTable[Name.data()] = SymbolLoc(SectionID, Offset); 231 Offset += Size; 232 Addr += Size; 233 } 234} 235 236unsigned RuntimeDyldImpl::emitSection(ObjectImage &Obj, 237 const SectionRef &Section, 238 bool IsCode) { 239 240 unsigned StubBufSize = 0, 241 StubSize = getMaxStubSize(); 242 error_code err; 243 const ObjectFile *ObjFile = Obj.getObjectFile(); 244 // FIXME: this is an inefficient way to handle this. We should computed the 245 // necessary section allocation size in loadObject by walking all the sections 246 // once. 247 if (StubSize > 0) { 248 for (section_iterator SI = ObjFile->begin_sections(), 249 SE = ObjFile->end_sections(); 250 SI != SE; SI.increment(err), Check(err)) { 251 section_iterator RelSecI = SI->getRelocatedSection(); 252 if (!(RelSecI == Section)) 253 continue; 254 255 for (relocation_iterator I = SI->begin_relocations(), 256 E = SI->end_relocations(); I != E; I.increment(err), Check(err)) { 257 StubBufSize += StubSize; 258 } 259 } 260 } 261 262 StringRef data; 263 uint64_t Alignment64; 264 Check(Section.getContents(data)); 265 Check(Section.getAlignment(Alignment64)); 266 267 unsigned Alignment = (unsigned)Alignment64 & 0xffffffffL; 268 bool IsRequired; 269 bool IsVirtual; 270 bool IsZeroInit; 271 bool IsReadOnly; 272 uint64_t DataSize; 273 unsigned PaddingSize = 0; 274 StringRef Name; 275 Check(Section.isRequiredForExecution(IsRequired)); 276 Check(Section.isVirtual(IsVirtual)); 277 Check(Section.isZeroInit(IsZeroInit)); 278 Check(Section.isReadOnlyData(IsReadOnly)); 279 Check(Section.getSize(DataSize)); 280 Check(Section.getName(Name)); 281 if (StubSize > 0) { 282 unsigned StubAlignment = getStubAlignment(); 283 unsigned EndAlignment = (DataSize | Alignment) & -(DataSize | Alignment); 284 if (StubAlignment > EndAlignment) 285 StubBufSize += StubAlignment - EndAlignment; 286 } 287 288 // The .eh_frame section (at least on Linux) needs an extra four bytes padded 289 // with zeroes added at the end. For MachO objects, this section has a 290 // slightly different name, so this won't have any effect for MachO objects. 291 if (Name == ".eh_frame") 292 PaddingSize = 4; 293 294 unsigned Allocate; 295 unsigned SectionID = Sections.size(); 296 uint8_t *Addr; 297 const char *pData = 0; 298 299 // Some sections, such as debug info, don't need to be loaded for execution. 300 // Leave those where they are. 301 if (IsRequired) { 302 Allocate = DataSize + PaddingSize + StubBufSize; 303 Addr = IsCode 304 ? MemMgr->allocateCodeSection(Allocate, Alignment, SectionID, Name) 305 : MemMgr->allocateDataSection(Allocate, Alignment, SectionID, Name, 306 IsReadOnly); 307 if (!Addr) 308 report_fatal_error("Unable to allocate section memory!"); 309 310 // Virtual sections have no data in the object image, so leave pData = 0 311 if (!IsVirtual) 312 pData = data.data(); 313 314 // Zero-initialize or copy the data from the image 315 if (IsZeroInit || IsVirtual) 316 memset(Addr, 0, DataSize); 317 else 318 memcpy(Addr, pData, DataSize); 319 320 // Fill in any extra bytes we allocated for padding 321 if (PaddingSize != 0) { 322 memset(Addr + DataSize, 0, PaddingSize); 323 // Update the DataSize variable so that the stub offset is set correctly. 324 DataSize += PaddingSize; 325 } 326 327 DEBUG(dbgs() << "emitSection SectionID: " << SectionID 328 << " Name: " << Name 329 << " obj addr: " << format("%p", pData) 330 << " new addr: " << format("%p", Addr) 331 << " DataSize: " << DataSize 332 << " StubBufSize: " << StubBufSize 333 << " Allocate: " << Allocate 334 << "\n"); 335 Obj.updateSectionAddress(Section, (uint64_t)Addr); 336 } 337 else { 338 // Even if we didn't load the section, we need to record an entry for it 339 // to handle later processing (and by 'handle' I mean don't do anything 340 // with these sections). 341 Allocate = 0; 342 Addr = 0; 343 DEBUG(dbgs() << "emitSection SectionID: " << SectionID 344 << " Name: " << Name 345 << " obj addr: " << format("%p", data.data()) 346 << " new addr: 0" 347 << " DataSize: " << DataSize 348 << " StubBufSize: " << StubBufSize 349 << " Allocate: " << Allocate 350 << "\n"); 351 } 352 353 Sections.push_back(SectionEntry(Name, Addr, DataSize, (uintptr_t)pData)); 354 return SectionID; 355} 356 357unsigned RuntimeDyldImpl::findOrEmitSection(ObjectImage &Obj, 358 const SectionRef &Section, 359 bool IsCode, 360 ObjSectionToIDMap &LocalSections) { 361 362 unsigned SectionID = 0; 363 ObjSectionToIDMap::iterator i = LocalSections.find(Section); 364 if (i != LocalSections.end()) 365 SectionID = i->second; 366 else { 367 SectionID = emitSection(Obj, Section, IsCode); 368 LocalSections[Section] = SectionID; 369 } 370 return SectionID; 371} 372 373void RuntimeDyldImpl::addRelocationForSection(const RelocationEntry &RE, 374 unsigned SectionID) { 375 Relocations[SectionID].push_back(RE); 376} 377 378void RuntimeDyldImpl::addRelocationForSymbol(const RelocationEntry &RE, 379 StringRef SymbolName) { 380 // Relocation by symbol. If the symbol is found in the global symbol table, 381 // create an appropriate section relocation. Otherwise, add it to 382 // ExternalSymbolRelocations. 383 SymbolTableMap::const_iterator Loc = 384 GlobalSymbolTable.find(SymbolName); 385 if (Loc == GlobalSymbolTable.end()) { 386 ExternalSymbolRelocations[SymbolName].push_back(RE); 387 } else { 388 // Copy the RE since we want to modify its addend. 389 RelocationEntry RECopy = RE; 390 RECopy.Addend += Loc->second.second; 391 Relocations[Loc->second.first].push_back(RECopy); 392 } 393} 394 395uint8_t *RuntimeDyldImpl::createStubFunction(uint8_t *Addr) { 396 if (Arch == Triple::aarch64) { 397 // This stub has to be able to access the full address space, 398 // since symbol lookup won't necessarily find a handy, in-range, 399 // PLT stub for functions which could be anywhere. 400 uint32_t *StubAddr = (uint32_t*)Addr; 401 402 // Stub can use ip0 (== x16) to calculate address 403 *StubAddr = 0xd2e00010; // movz ip0, #:abs_g3:<addr> 404 StubAddr++; 405 *StubAddr = 0xf2c00010; // movk ip0, #:abs_g2_nc:<addr> 406 StubAddr++; 407 *StubAddr = 0xf2a00010; // movk ip0, #:abs_g1_nc:<addr> 408 StubAddr++; 409 *StubAddr = 0xf2800010; // movk ip0, #:abs_g0_nc:<addr> 410 StubAddr++; 411 *StubAddr = 0xd61f0200; // br ip0 412 413 return Addr; 414 } else if (Arch == Triple::arm) { 415 // TODO: There is only ARM far stub now. We should add the Thumb stub, 416 // and stubs for branches Thumb - ARM and ARM - Thumb. 417 uint32_t *StubAddr = (uint32_t*)Addr; 418 *StubAddr = 0xe51ff004; // ldr pc,<label> 419 return (uint8_t*)++StubAddr; 420 } else if (Arch == Triple::mipsel || Arch == Triple::mips) { 421 uint32_t *StubAddr = (uint32_t*)Addr; 422 // 0: 3c190000 lui t9,%hi(addr). 423 // 4: 27390000 addiu t9,t9,%lo(addr). 424 // 8: 03200008 jr t9. 425 // c: 00000000 nop. 426 const unsigned LuiT9Instr = 0x3c190000, AdduiT9Instr = 0x27390000; 427 const unsigned JrT9Instr = 0x03200008, NopInstr = 0x0; 428 429 *StubAddr = LuiT9Instr; 430 StubAddr++; 431 *StubAddr = AdduiT9Instr; 432 StubAddr++; 433 *StubAddr = JrT9Instr; 434 StubAddr++; 435 *StubAddr = NopInstr; 436 return Addr; 437 } else if (Arch == Triple::ppc64 || Arch == Triple::ppc64le) { 438 // PowerPC64 stub: the address points to a function descriptor 439 // instead of the function itself. Load the function address 440 // on r11 and sets it to control register. Also loads the function 441 // TOC in r2 and environment pointer to r11. 442 writeInt32BE(Addr, 0x3D800000); // lis r12, highest(addr) 443 writeInt32BE(Addr+4, 0x618C0000); // ori r12, higher(addr) 444 writeInt32BE(Addr+8, 0x798C07C6); // sldi r12, r12, 32 445 writeInt32BE(Addr+12, 0x658C0000); // oris r12, r12, h(addr) 446 writeInt32BE(Addr+16, 0x618C0000); // ori r12, r12, l(addr) 447 writeInt32BE(Addr+20, 0xF8410028); // std r2, 40(r1) 448 writeInt32BE(Addr+24, 0xE96C0000); // ld r11, 0(r12) 449 writeInt32BE(Addr+28, 0xE84C0008); // ld r2, 0(r12) 450 writeInt32BE(Addr+32, 0x7D6903A6); // mtctr r11 451 writeInt32BE(Addr+36, 0xE96C0010); // ld r11, 16(r2) 452 writeInt32BE(Addr+40, 0x4E800420); // bctr 453 454 return Addr; 455 } else if (Arch == Triple::systemz) { 456 writeInt16BE(Addr, 0xC418); // lgrl %r1,.+8 457 writeInt16BE(Addr+2, 0x0000); 458 writeInt16BE(Addr+4, 0x0004); 459 writeInt16BE(Addr+6, 0x07F1); // brc 15,%r1 460 // 8-byte address stored at Addr + 8 461 return Addr; 462 } else if (Arch == Triple::x86_64) { 463 *Addr = 0xFF; // jmp 464 *(Addr+1) = 0x25; // rip 465 // 32-bit PC-relative address of the GOT entry will be stored at Addr+2 466 } 467 return Addr; 468} 469 470// Assign an address to a symbol name and resolve all the relocations 471// associated with it. 472void RuntimeDyldImpl::reassignSectionAddress(unsigned SectionID, 473 uint64_t Addr) { 474 // The address to use for relocation resolution is not 475 // the address of the local section buffer. We must be doing 476 // a remote execution environment of some sort. Relocations can't 477 // be applied until all the sections have been moved. The client must 478 // trigger this with a call to MCJIT::finalize() or 479 // RuntimeDyld::resolveRelocations(). 480 // 481 // Addr is a uint64_t because we can't assume the pointer width 482 // of the target is the same as that of the host. Just use a generic 483 // "big enough" type. 484 Sections[SectionID].LoadAddress = Addr; 485} 486 487void RuntimeDyldImpl::resolveRelocationList(const RelocationList &Relocs, 488 uint64_t Value) { 489 for (unsigned i = 0, e = Relocs.size(); i != e; ++i) { 490 const RelocationEntry &RE = Relocs[i]; 491 // Ignore relocations for sections that were not loaded 492 if (Sections[RE.SectionID].Address == 0) 493 continue; 494 resolveRelocation(RE, Value); 495 } 496} 497 498void RuntimeDyldImpl::resolveExternalSymbols() { 499 while(!ExternalSymbolRelocations.empty()) { 500 StringMap<RelocationList>::iterator i = ExternalSymbolRelocations.begin(); 501 502 StringRef Name = i->first(); 503 if (Name.size() == 0) { 504 // This is an absolute symbol, use an address of zero. 505 DEBUG(dbgs() << "Resolving absolute relocations." << "\n"); 506 RelocationList &Relocs = i->second; 507 resolveRelocationList(Relocs, 0); 508 } else { 509 uint64_t Addr = 0; 510 SymbolTableMap::const_iterator Loc = GlobalSymbolTable.find(Name); 511 if (Loc == GlobalSymbolTable.end()) { 512 // This is an external symbol, try to get its address from 513 // MemoryManager. 514 Addr = MemMgr->getSymbolAddress(Name.data()); 515 // The call to getSymbolAddress may have caused additional modules to 516 // be loaded, which may have added new entries to the 517 // ExternalSymbolRelocations map. Consquently, we need to update our 518 // iterator. This is also why retrieval of the relocation list 519 // associated with this symbol is deferred until below this point. 520 // New entries may have been added to the relocation list. 521 i = ExternalSymbolRelocations.find(Name); 522 } else { 523 // We found the symbol in our global table. It was probably in a 524 // Module that we loaded previously. 525 SymbolLoc SymLoc = Loc->second; 526 Addr = getSectionLoadAddress(SymLoc.first) + SymLoc.second; 527 } 528 529 // FIXME: Implement error handling that doesn't kill the host program! 530 if (!Addr) 531 report_fatal_error("Program used external function '" + Name + 532 "' which could not be resolved!"); 533 534 updateGOTEntries(Name, Addr); 535 DEBUG(dbgs() << "Resolving relocations Name: " << Name 536 << "\t" << format("0x%lx", Addr) 537 << "\n"); 538 // This list may have been updated when we called getSymbolAddress, so 539 // don't change this code to get the list earlier. 540 RelocationList &Relocs = i->second; 541 resolveRelocationList(Relocs, Addr); 542 } 543 544 ExternalSymbolRelocations.erase(i); 545 } 546} 547 548 549//===----------------------------------------------------------------------===// 550// RuntimeDyld class implementation 551RuntimeDyld::RuntimeDyld(RTDyldMemoryManager *mm) { 552 // FIXME: There's a potential issue lurking here if a single instance of 553 // RuntimeDyld is used to load multiple objects. The current implementation 554 // associates a single memory manager with a RuntimeDyld instance. Even 555 // though the public class spawns a new 'impl' instance for each load, 556 // they share a single memory manager. This can become a problem when page 557 // permissions are applied. 558 Dyld = 0; 559 MM = mm; 560} 561 562RuntimeDyld::~RuntimeDyld() { 563 delete Dyld; 564} 565 566ObjectImage *RuntimeDyld::loadObject(ObjectBuffer *InputBuffer) { 567 if (!Dyld) { 568 sys::fs::file_magic Type = 569 sys::fs::identify_magic(InputBuffer->getBuffer()); 570 switch (Type) { 571 case sys::fs::file_magic::elf_relocatable: 572 case sys::fs::file_magic::elf_executable: 573 case sys::fs::file_magic::elf_shared_object: 574 case sys::fs::file_magic::elf_core: 575 Dyld = new RuntimeDyldELF(MM); 576 break; 577 case sys::fs::file_magic::macho_object: 578 case sys::fs::file_magic::macho_executable: 579 case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib: 580 case sys::fs::file_magic::macho_core: 581 case sys::fs::file_magic::macho_preload_executable: 582 case sys::fs::file_magic::macho_dynamically_linked_shared_lib: 583 case sys::fs::file_magic::macho_dynamic_linker: 584 case sys::fs::file_magic::macho_bundle: 585 case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub: 586 case sys::fs::file_magic::macho_dsym_companion: 587 Dyld = new RuntimeDyldMachO(MM); 588 break; 589 case sys::fs::file_magic::unknown: 590 case sys::fs::file_magic::bitcode: 591 case sys::fs::file_magic::archive: 592 case sys::fs::file_magic::coff_object: 593 case sys::fs::file_magic::coff_import_library: 594 case sys::fs::file_magic::pecoff_executable: 595 case sys::fs::file_magic::macho_universal_binary: 596 case sys::fs::file_magic::windows_resource: 597 report_fatal_error("Incompatible object format!"); 598 } 599 } else { 600 if (!Dyld->isCompatibleFormat(InputBuffer)) 601 report_fatal_error("Incompatible object format!"); 602 } 603 604 return Dyld->loadObject(InputBuffer); 605} 606 607void *RuntimeDyld::getSymbolAddress(StringRef Name) { 608 if (!Dyld) 609 return NULL; 610 return Dyld->getSymbolAddress(Name); 611} 612 613uint64_t RuntimeDyld::getSymbolLoadAddress(StringRef Name) { 614 if (!Dyld) 615 return 0; 616 return Dyld->getSymbolLoadAddress(Name); 617} 618 619void RuntimeDyld::resolveRelocations() { 620 Dyld->resolveRelocations(); 621} 622 623void RuntimeDyld::reassignSectionAddress(unsigned SectionID, 624 uint64_t Addr) { 625 Dyld->reassignSectionAddress(SectionID, Addr); 626} 627 628void RuntimeDyld::mapSectionAddress(const void *LocalAddress, 629 uint64_t TargetAddress) { 630 Dyld->mapSectionAddress(LocalAddress, TargetAddress); 631} 632 633StringRef RuntimeDyld::getErrorString() { 634 return Dyld->getErrorString(); 635} 636 637void RuntimeDyld::registerEHFrames() { 638 if (Dyld) 639 Dyld->registerEHFrames(); 640} 641 642void RuntimeDyld::deregisterEHFrames() { 643 if (Dyld) 644 Dyld->deregisterEHFrames(); 645} 646 647} // end namespace llvm 648