1 //===-- RuntimeDyld.cpp - Run-time dynamic linker for MC-JIT ----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Implementation of the MC-JIT runtime dynamic linker.
12 //===----------------------------------------------------------------------===//
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/Object/ELF.h"
22 #include "llvm/Support/MathExtras.h"
23 #include "llvm/Support/MutexGuard.h"
26 using namespace llvm::object;
28 // Empty out-of-line virtual destructor as the key function.
29 RuntimeDyldImpl::~RuntimeDyldImpl() {}
31 // Pin the JITRegistrar's and ObjectImage*'s vtables to this file.
32 void JITRegistrar::anchor() {}
33 void ObjectImage::anchor() {}
34 void ObjectImageCommon::anchor() {}
38 void RuntimeDyldImpl::registerEHFrames() {
41 void RuntimeDyldImpl::deregisterEHFrames() {
44 // Resolve the relocations for all symbols we currently know about.
45 void RuntimeDyldImpl::resolveRelocations() {
46 MutexGuard locked(lock);
48 // First, resolve relocations associated with external symbols.
49 resolveExternalSymbols();
51 // Just iterate over the sections we have and resolve all the relocations
52 // in them. Gross overkill, but it gets the job done.
53 for (int i = 0, e = Sections.size(); i != e; ++i) {
54 // The Section here (Sections[i]) refers to the section in which the
55 // symbol for the relocation is located. The SectionID in the relocation
56 // entry provides the section to which the relocation will be applied.
57 uint64_t Addr = Sections[i].LoadAddress;
58 DEBUG(dbgs() << "Resolving relocations Section #" << i
59 << "\t" << format("%p", (uint8_t *)Addr)
61 resolveRelocationList(Relocations[i], Addr);
66 void RuntimeDyldImpl::mapSectionAddress(const void *LocalAddress,
67 uint64_t TargetAddress) {
68 MutexGuard locked(lock);
69 for (unsigned i = 0, e = Sections.size(); i != e; ++i) {
70 if (Sections[i].Address == LocalAddress) {
71 reassignSectionAddress(i, TargetAddress);
75 llvm_unreachable("Attempting to remap address of unknown section!");
78 ObjectImage* RuntimeDyldImpl::loadObject(ObjectImage *InputObject) {
79 MutexGuard locked(lock);
81 std::unique_ptr<ObjectImage> Obj(InputObject);
85 // Save information about our target
86 Arch = (Triple::ArchType)Obj->getArch();
87 IsTargetLittleEndian = Obj->getObjectFile()->isLittleEndian();
89 // Compute the memory size required to load all sections to be loaded
90 // and pass this information to the memory manager
91 if (MemMgr->needsToReserveAllocationSpace()) {
92 uint64_t CodeSize = 0, DataSizeRO = 0, DataSizeRW = 0;
93 computeTotalAllocSize(*Obj, CodeSize, DataSizeRO, DataSizeRW);
94 MemMgr->reserveAllocationSpace(CodeSize, DataSizeRO, DataSizeRW);
97 // Symbols found in this object
98 StringMap<SymbolLoc> LocalSymbols;
99 // Used sections from the object file
100 ObjSectionToIDMap LocalSections;
102 // Common symbols requiring allocation, with their sizes and alignments
103 CommonSymbolMap CommonSymbols;
104 // Maximum required total memory to allocate all common symbols
105 uint64_t CommonSize = 0;
108 DEBUG(dbgs() << "Parse symbols:\n");
109 for (symbol_iterator I = Obj->begin_symbols(), E = Obj->end_symbols(); I != E;
111 object::SymbolRef::Type SymType;
113 Check(I->getType(SymType));
114 Check(I->getName(Name));
116 uint32_t Flags = I->getFlags();
118 bool IsCommon = Flags & SymbolRef::SF_Common;
120 // Add the common symbols to a list. We'll allocate them all below.
122 Check(I->getAlignment(Align));
124 Check(I->getSize(Size));
125 CommonSize += Size + Align;
126 CommonSymbols[*I] = CommonSymbolInfo(Size, Align);
128 if (SymType == object::SymbolRef::ST_Function ||
129 SymType == object::SymbolRef::ST_Data ||
130 SymType == object::SymbolRef::ST_Unknown) {
132 StringRef SectionData;
134 section_iterator SI = Obj->end_sections();
135 Check(I->getFileOffset(FileOffset));
136 Check(I->getSection(SI));
137 if (SI == Obj->end_sections()) continue;
138 Check(SI->getContents(SectionData));
139 Check(SI->isText(IsCode));
140 const uint8_t* SymPtr = (const uint8_t*)Obj->getData().data() +
141 (uintptr_t)FileOffset;
142 uintptr_t SectOffset = (uintptr_t)(SymPtr -
143 (const uint8_t*)SectionData.begin());
144 unsigned SectionID = findOrEmitSection(*Obj, *SI, IsCode, LocalSections);
145 LocalSymbols[Name.data()] = SymbolLoc(SectionID, SectOffset);
146 DEBUG(dbgs() << "\tFileOffset: " << format("%p", (uintptr_t)FileOffset)
147 << " flags: " << Flags
148 << " SID: " << SectionID
149 << " Offset: " << format("%p", SectOffset));
150 GlobalSymbolTable[Name] = SymbolLoc(SectionID, SectOffset);
153 DEBUG(dbgs() << "\tType: " << SymType << " Name: " << Name << "\n");
156 // Allocate common symbols
158 emitCommonSymbols(*Obj, CommonSymbols, CommonSize, LocalSymbols);
160 // Parse and process relocations
161 DEBUG(dbgs() << "Parse relocations:\n");
162 for (section_iterator SI = Obj->begin_sections(), SE = Obj->end_sections();
164 bool IsFirstRelocation = true;
165 unsigned SectionID = 0;
167 section_iterator RelocatedSection = SI->getRelocatedSection();
169 for (relocation_iterator I = SI->relocation_begin(),
170 E = SI->relocation_end();
172 // If it's the first relocation in this section, find its SectionID
173 if (IsFirstRelocation) {
175 Check(RelocatedSection->isText(IsCode));
177 findOrEmitSection(*Obj, *RelocatedSection, IsCode, LocalSections);
178 DEBUG(dbgs() << "\tSectionID: " << SectionID << "\n");
179 IsFirstRelocation = false;
182 processRelocationRef(SectionID, *I, *Obj, LocalSections, LocalSymbols,
187 // Give the subclasses a chance to tie-up any loose ends.
188 finalizeLoad(LocalSections);
190 return Obj.release();
193 // A helper method for computeTotalAllocSize.
194 // Computes the memory size required to allocate sections with the given sizes,
195 // assuming that all sections are allocated with the given alignment
196 static uint64_t computeAllocationSizeForSections(std::vector<uint64_t>& SectionSizes,
197 uint64_t Alignment) {
198 uint64_t TotalSize = 0;
199 for (size_t Idx = 0, Cnt = SectionSizes.size(); Idx < Cnt; Idx++) {
200 uint64_t AlignedSize = (SectionSizes[Idx] + Alignment - 1) /
201 Alignment * Alignment;
202 TotalSize += AlignedSize;
207 // Compute an upper bound of the memory size that is required to load all sections
208 void RuntimeDyldImpl::computeTotalAllocSize(ObjectImage &Obj,
209 uint64_t& CodeSize, uint64_t& DataSizeRO, uint64_t& DataSizeRW) {
210 // Compute the size of all sections required for execution
211 std::vector<uint64_t> CodeSectionSizes;
212 std::vector<uint64_t> ROSectionSizes;
213 std::vector<uint64_t> RWSectionSizes;
214 uint64_t MaxAlignment = sizeof(void*);
216 // Collect sizes of all sections to be loaded;
217 // also determine the max alignment of all sections
218 for (section_iterator SI = Obj.begin_sections(), SE = Obj.end_sections();
220 const SectionRef &Section = *SI;
223 Check(Section.isRequiredForExecution(IsRequired));
225 // Consider only the sections that are required to be loaded for execution
227 uint64_t DataSize = 0;
228 uint64_t Alignment64 = 0;
230 bool IsReadOnly = false;
232 Check(Section.getSize(DataSize));
233 Check(Section.getAlignment(Alignment64));
234 Check(Section.isText(IsCode));
235 Check(Section.isReadOnlyData(IsReadOnly));
236 Check(Section.getName(Name));
237 unsigned Alignment = (unsigned) Alignment64 & 0xffffffffL;
239 uint64_t StubBufSize = computeSectionStubBufSize(Obj, Section);
240 uint64_t SectionSize = DataSize + StubBufSize;
242 // The .eh_frame section (at least on Linux) needs an extra four bytes padded
243 // with zeroes added at the end. For MachO objects, this section has a
244 // slightly different name, so this won't have any effect for MachO objects.
245 if (Name == ".eh_frame")
248 if (SectionSize > 0) {
249 // save the total size of the section
251 CodeSectionSizes.push_back(SectionSize);
252 } else if (IsReadOnly) {
253 ROSectionSizes.push_back(SectionSize);
255 RWSectionSizes.push_back(SectionSize);
257 // update the max alignment
258 if (Alignment > MaxAlignment) {
259 MaxAlignment = Alignment;
265 // Compute the size of all common symbols
266 uint64_t CommonSize = 0;
267 for (symbol_iterator I = Obj.begin_symbols(), E = Obj.end_symbols();
269 uint32_t Flags = I->getFlags();
270 if (Flags & SymbolRef::SF_Common) {
271 // Add the common symbols to a list. We'll allocate them all below.
273 Check(I->getSize(Size));
277 if (CommonSize != 0) {
278 RWSectionSizes.push_back(CommonSize);
281 // Compute the required allocation space for each different type of sections
282 // (code, read-only data, read-write data) assuming that all sections are
283 // allocated with the max alignment. Note that we cannot compute with the
284 // individual alignments of the sections, because then the required size
285 // depends on the order, in which the sections are allocated.
286 CodeSize = computeAllocationSizeForSections(CodeSectionSizes, MaxAlignment);
287 DataSizeRO = computeAllocationSizeForSections(ROSectionSizes, MaxAlignment);
288 DataSizeRW = computeAllocationSizeForSections(RWSectionSizes, MaxAlignment);
291 // compute stub buffer size for the given section
292 unsigned RuntimeDyldImpl::computeSectionStubBufSize(ObjectImage &Obj,
293 const SectionRef &Section) {
294 unsigned StubSize = getMaxStubSize();
298 // FIXME: this is an inefficient way to handle this. We should computed the
299 // necessary section allocation size in loadObject by walking all the sections
301 unsigned StubBufSize = 0;
302 for (section_iterator SI = Obj.begin_sections(),
303 SE = Obj.end_sections();
305 section_iterator RelSecI = SI->getRelocatedSection();
306 if (!(RelSecI == Section))
309 for (relocation_iterator I = SI->relocation_begin(),
310 E = SI->relocation_end();
312 StubBufSize += StubSize;
316 // Get section data size and alignment
317 uint64_t Alignment64;
319 Check(Section.getSize(DataSize));
320 Check(Section.getAlignment(Alignment64));
322 // Add stubbuf size alignment
323 unsigned Alignment = (unsigned)Alignment64 & 0xffffffffL;
324 unsigned StubAlignment = getStubAlignment();
325 unsigned EndAlignment = (DataSize | Alignment) & -(DataSize | Alignment);
326 if (StubAlignment > EndAlignment)
327 StubBufSize += StubAlignment - EndAlignment;
331 void RuntimeDyldImpl::emitCommonSymbols(ObjectImage &Obj,
332 const CommonSymbolMap &CommonSymbols,
334 SymbolTableMap &SymbolTable) {
335 // Allocate memory for the section
336 unsigned SectionID = Sections.size();
337 uint8_t *Addr = MemMgr->allocateDataSection(
338 TotalSize, sizeof(void*), SectionID, StringRef(), false);
340 report_fatal_error("Unable to allocate memory for common symbols!");
342 Sections.push_back(SectionEntry(StringRef(), Addr, TotalSize, 0));
343 memset(Addr, 0, TotalSize);
345 DEBUG(dbgs() << "emitCommonSection SectionID: " << SectionID
346 << " new addr: " << format("%p", Addr)
347 << " DataSize: " << TotalSize
350 // Assign the address of each symbol
351 for (CommonSymbolMap::const_iterator it = CommonSymbols.begin(),
352 itEnd = CommonSymbols.end(); it != itEnd; it++) {
353 uint64_t Size = it->second.first;
354 uint64_t Align = it->second.second;
356 it->first.getName(Name);
358 // This symbol has an alignment requirement.
359 uint64_t AlignOffset = OffsetToAlignment((uint64_t)Addr, Align);
361 Offset += AlignOffset;
362 DEBUG(dbgs() << "Allocating common symbol " << Name << " address " <<
363 format("%p\n", Addr));
365 Obj.updateSymbolAddress(it->first, (uint64_t)Addr);
366 SymbolTable[Name.data()] = SymbolLoc(SectionID, Offset);
372 unsigned RuntimeDyldImpl::emitSection(ObjectImage &Obj,
373 const SectionRef &Section,
377 uint64_t Alignment64;
378 Check(Section.getContents(data));
379 Check(Section.getAlignment(Alignment64));
381 unsigned Alignment = (unsigned)Alignment64 & 0xffffffffL;
387 unsigned PaddingSize = 0;
388 unsigned StubBufSize = 0;
390 Check(Section.isRequiredForExecution(IsRequired));
391 Check(Section.isVirtual(IsVirtual));
392 Check(Section.isZeroInit(IsZeroInit));
393 Check(Section.isReadOnlyData(IsReadOnly));
394 Check(Section.getSize(DataSize));
395 Check(Section.getName(Name));
397 StubBufSize = computeSectionStubBufSize(Obj, Section);
399 // The .eh_frame section (at least on Linux) needs an extra four bytes padded
400 // with zeroes added at the end. For MachO objects, this section has a
401 // slightly different name, so this won't have any effect for MachO objects.
402 if (Name == ".eh_frame")
406 unsigned SectionID = Sections.size();
408 const char *pData = 0;
410 // Some sections, such as debug info, don't need to be loaded for execution.
411 // Leave those where they are.
413 Allocate = DataSize + PaddingSize + StubBufSize;
415 ? MemMgr->allocateCodeSection(Allocate, Alignment, SectionID, Name)
416 : MemMgr->allocateDataSection(Allocate, Alignment, SectionID, Name,
419 report_fatal_error("Unable to allocate section memory!");
421 // Virtual sections have no data in the object image, so leave pData = 0
425 // Zero-initialize or copy the data from the image
426 if (IsZeroInit || IsVirtual)
427 memset(Addr, 0, DataSize);
429 memcpy(Addr, pData, DataSize);
431 // Fill in any extra bytes we allocated for padding
432 if (PaddingSize != 0) {
433 memset(Addr + DataSize, 0, PaddingSize);
434 // Update the DataSize variable so that the stub offset is set correctly.
435 DataSize += PaddingSize;
438 DEBUG(dbgs() << "emitSection SectionID: " << SectionID
440 << " obj addr: " << format("%p", pData)
441 << " new addr: " << format("%p", Addr)
442 << " DataSize: " << DataSize
443 << " StubBufSize: " << StubBufSize
444 << " Allocate: " << Allocate
446 Obj.updateSectionAddress(Section, (uint64_t)Addr);
449 // Even if we didn't load the section, we need to record an entry for it
450 // to handle later processing (and by 'handle' I mean don't do anything
451 // with these sections).
454 DEBUG(dbgs() << "emitSection SectionID: " << SectionID
456 << " obj addr: " << format("%p", data.data())
458 << " DataSize: " << DataSize
459 << " StubBufSize: " << StubBufSize
460 << " Allocate: " << Allocate
464 Sections.push_back(SectionEntry(Name, Addr, DataSize, (uintptr_t)pData));
468 unsigned RuntimeDyldImpl::findOrEmitSection(ObjectImage &Obj,
469 const SectionRef &Section,
471 ObjSectionToIDMap &LocalSections) {
473 unsigned SectionID = 0;
474 ObjSectionToIDMap::iterator i = LocalSections.find(Section);
475 if (i != LocalSections.end())
476 SectionID = i->second;
478 SectionID = emitSection(Obj, Section, IsCode);
479 LocalSections[Section] = SectionID;
484 void RuntimeDyldImpl::addRelocationForSection(const RelocationEntry &RE,
485 unsigned SectionID) {
486 Relocations[SectionID].push_back(RE);
489 void RuntimeDyldImpl::addRelocationForSymbol(const RelocationEntry &RE,
490 StringRef SymbolName) {
491 // Relocation by symbol. If the symbol is found in the global symbol table,
492 // create an appropriate section relocation. Otherwise, add it to
493 // ExternalSymbolRelocations.
494 SymbolTableMap::const_iterator Loc =
495 GlobalSymbolTable.find(SymbolName);
496 if (Loc == GlobalSymbolTable.end()) {
497 ExternalSymbolRelocations[SymbolName].push_back(RE);
499 // Copy the RE since we want to modify its addend.
500 RelocationEntry RECopy = RE;
501 RECopy.Addend += Loc->second.second;
502 Relocations[Loc->second.first].push_back(RECopy);
506 uint8_t *RuntimeDyldImpl::createStubFunction(uint8_t *Addr) {
507 if (Arch == Triple::aarch64) {
508 // This stub has to be able to access the full address space,
509 // since symbol lookup won't necessarily find a handy, in-range,
510 // PLT stub for functions which could be anywhere.
511 uint32_t *StubAddr = (uint32_t*)Addr;
513 // Stub can use ip0 (== x16) to calculate address
514 *StubAddr = 0xd2e00010; // movz ip0, #:abs_g3:<addr>
516 *StubAddr = 0xf2c00010; // movk ip0, #:abs_g2_nc:<addr>
518 *StubAddr = 0xf2a00010; // movk ip0, #:abs_g1_nc:<addr>
520 *StubAddr = 0xf2800010; // movk ip0, #:abs_g0_nc:<addr>
522 *StubAddr = 0xd61f0200; // br ip0
525 } else if (Arch == Triple::arm) {
526 // TODO: There is only ARM far stub now. We should add the Thumb stub,
527 // and stubs for branches Thumb - ARM and ARM - Thumb.
528 uint32_t *StubAddr = (uint32_t*)Addr;
529 *StubAddr = 0xe51ff004; // ldr pc,<label>
530 return (uint8_t*)++StubAddr;
531 } else if (Arch == Triple::mipsel || Arch == Triple::mips) {
532 uint32_t *StubAddr = (uint32_t*)Addr;
533 // 0: 3c190000 lui t9,%hi(addr).
534 // 4: 27390000 addiu t9,t9,%lo(addr).
535 // 8: 03200008 jr t9.
537 const unsigned LuiT9Instr = 0x3c190000, AdduiT9Instr = 0x27390000;
538 const unsigned JrT9Instr = 0x03200008, NopInstr = 0x0;
540 *StubAddr = LuiT9Instr;
542 *StubAddr = AdduiT9Instr;
544 *StubAddr = JrT9Instr;
546 *StubAddr = NopInstr;
548 } else if (Arch == Triple::ppc64 || Arch == Triple::ppc64le) {
549 // PowerPC64 stub: the address points to a function descriptor
550 // instead of the function itself. Load the function address
551 // on r11 and sets it to control register. Also loads the function
552 // TOC in r2 and environment pointer to r11.
553 writeInt32BE(Addr, 0x3D800000); // lis r12, highest(addr)
554 writeInt32BE(Addr+4, 0x618C0000); // ori r12, higher(addr)
555 writeInt32BE(Addr+8, 0x798C07C6); // sldi r12, r12, 32
556 writeInt32BE(Addr+12, 0x658C0000); // oris r12, r12, h(addr)
557 writeInt32BE(Addr+16, 0x618C0000); // ori r12, r12, l(addr)
558 writeInt32BE(Addr+20, 0xF8410028); // std r2, 40(r1)
559 writeInt32BE(Addr+24, 0xE96C0000); // ld r11, 0(r12)
560 writeInt32BE(Addr+28, 0xE84C0008); // ld r2, 0(r12)
561 writeInt32BE(Addr+32, 0x7D6903A6); // mtctr r11
562 writeInt32BE(Addr+36, 0xE96C0010); // ld r11, 16(r2)
563 writeInt32BE(Addr+40, 0x4E800420); // bctr
566 } else if (Arch == Triple::systemz) {
567 writeInt16BE(Addr, 0xC418); // lgrl %r1,.+8
568 writeInt16BE(Addr+2, 0x0000);
569 writeInt16BE(Addr+4, 0x0004);
570 writeInt16BE(Addr+6, 0x07F1); // brc 15,%r1
571 // 8-byte address stored at Addr + 8
573 } else if (Arch == Triple::x86_64) {
575 *(Addr+1) = 0x25; // rip
576 // 32-bit PC-relative address of the GOT entry will be stored at Addr+2
581 // Assign an address to a symbol name and resolve all the relocations
582 // associated with it.
583 void RuntimeDyldImpl::reassignSectionAddress(unsigned SectionID,
585 // The address to use for relocation resolution is not
586 // the address of the local section buffer. We must be doing
587 // a remote execution environment of some sort. Relocations can't
588 // be applied until all the sections have been moved. The client must
589 // trigger this with a call to MCJIT::finalize() or
590 // RuntimeDyld::resolveRelocations().
592 // Addr is a uint64_t because we can't assume the pointer width
593 // of the target is the same as that of the host. Just use a generic
594 // "big enough" type.
595 Sections[SectionID].LoadAddress = Addr;
598 void RuntimeDyldImpl::resolveRelocationList(const RelocationList &Relocs,
600 for (unsigned i = 0, e = Relocs.size(); i != e; ++i) {
601 const RelocationEntry &RE = Relocs[i];
602 // Ignore relocations for sections that were not loaded
603 if (Sections[RE.SectionID].Address == 0)
605 resolveRelocation(RE, Value);
609 void RuntimeDyldImpl::resolveExternalSymbols() {
610 while(!ExternalSymbolRelocations.empty()) {
611 StringMap<RelocationList>::iterator i = ExternalSymbolRelocations.begin();
613 StringRef Name = i->first();
614 if (Name.size() == 0) {
615 // This is an absolute symbol, use an address of zero.
616 DEBUG(dbgs() << "Resolving absolute relocations." << "\n");
617 RelocationList &Relocs = i->second;
618 resolveRelocationList(Relocs, 0);
621 SymbolTableMap::const_iterator Loc = GlobalSymbolTable.find(Name);
622 if (Loc == GlobalSymbolTable.end()) {
623 // This is an external symbol, try to get its address from
625 Addr = MemMgr->getSymbolAddress(Name.data());
626 // The call to getSymbolAddress may have caused additional modules to
627 // be loaded, which may have added new entries to the
628 // ExternalSymbolRelocations map. Consquently, we need to update our
629 // iterator. This is also why retrieval of the relocation list
630 // associated with this symbol is deferred until below this point.
631 // New entries may have been added to the relocation list.
632 i = ExternalSymbolRelocations.find(Name);
634 // We found the symbol in our global table. It was probably in a
635 // Module that we loaded previously.
636 SymbolLoc SymLoc = Loc->second;
637 Addr = getSectionLoadAddress(SymLoc.first) + SymLoc.second;
640 // FIXME: Implement error handling that doesn't kill the host program!
642 report_fatal_error("Program used external function '" + Name +
643 "' which could not be resolved!");
645 updateGOTEntries(Name, Addr);
646 DEBUG(dbgs() << "Resolving relocations Name: " << Name
647 << "\t" << format("0x%lx", Addr)
649 // This list may have been updated when we called getSymbolAddress, so
650 // don't change this code to get the list earlier.
651 RelocationList &Relocs = i->second;
652 resolveRelocationList(Relocs, Addr);
655 ExternalSymbolRelocations.erase(i);
660 //===----------------------------------------------------------------------===//
661 // RuntimeDyld class implementation
662 RuntimeDyld::RuntimeDyld(RTDyldMemoryManager *mm) {
663 // FIXME: There's a potential issue lurking here if a single instance of
664 // RuntimeDyld is used to load multiple objects. The current implementation
665 // associates a single memory manager with a RuntimeDyld instance. Even
666 // though the public class spawns a new 'impl' instance for each load,
667 // they share a single memory manager. This can become a problem when page
668 // permissions are applied.
673 RuntimeDyld::~RuntimeDyld() {
677 ObjectImage *RuntimeDyld::loadObject(ObjectFile *InputObject) {
678 std::unique_ptr<ObjectImage> InputImage;
680 if (InputObject->isELF()) {
681 InputImage.reset(RuntimeDyldELF::createObjectImageFromFile(InputObject));
683 Dyld = new RuntimeDyldELF(MM);
684 } else if (InputObject->isMachO()) {
685 InputImage.reset(RuntimeDyldMachO::createObjectImageFromFile(InputObject));
687 Dyld = new RuntimeDyldMachO(MM);
689 report_fatal_error("Incompatible object format!");
691 if (!Dyld->isCompatibleFile(InputObject))
692 report_fatal_error("Incompatible object format!");
694 Dyld->loadObject(InputImage.get());
695 return InputImage.release();
698 ObjectImage *RuntimeDyld::loadObject(ObjectBuffer *InputBuffer) {
699 std::unique_ptr<ObjectImage> InputImage;
700 sys::fs::file_magic Type =
701 sys::fs::identify_magic(InputBuffer->getBuffer());
704 case sys::fs::file_magic::elf_relocatable:
705 case sys::fs::file_magic::elf_executable:
706 case sys::fs::file_magic::elf_shared_object:
707 case sys::fs::file_magic::elf_core:
708 InputImage.reset(RuntimeDyldELF::createObjectImage(InputBuffer));
710 Dyld = new RuntimeDyldELF(MM);
712 case sys::fs::file_magic::macho_object:
713 case sys::fs::file_magic::macho_executable:
714 case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
715 case sys::fs::file_magic::macho_core:
716 case sys::fs::file_magic::macho_preload_executable:
717 case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
718 case sys::fs::file_magic::macho_dynamic_linker:
719 case sys::fs::file_magic::macho_bundle:
720 case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
721 case sys::fs::file_magic::macho_dsym_companion:
722 InputImage.reset(RuntimeDyldMachO::createObjectImage(InputBuffer));
724 Dyld = new RuntimeDyldMachO(MM);
726 case sys::fs::file_magic::unknown:
727 case sys::fs::file_magic::bitcode:
728 case sys::fs::file_magic::archive:
729 case sys::fs::file_magic::coff_object:
730 case sys::fs::file_magic::coff_import_library:
731 case sys::fs::file_magic::pecoff_executable:
732 case sys::fs::file_magic::macho_universal_binary:
733 case sys::fs::file_magic::windows_resource:
734 report_fatal_error("Incompatible object format!");
737 if (!Dyld->isCompatibleFormat(InputBuffer))
738 report_fatal_error("Incompatible object format!");
740 Dyld->loadObject(InputImage.get());
741 return InputImage.release();
744 void *RuntimeDyld::getSymbolAddress(StringRef Name) {
747 return Dyld->getSymbolAddress(Name);
750 uint64_t RuntimeDyld::getSymbolLoadAddress(StringRef Name) {
753 return Dyld->getSymbolLoadAddress(Name);
756 void RuntimeDyld::resolveRelocations() {
757 Dyld->resolveRelocations();
760 void RuntimeDyld::reassignSectionAddress(unsigned SectionID,
762 Dyld->reassignSectionAddress(SectionID, Addr);
765 void RuntimeDyld::mapSectionAddress(const void *LocalAddress,
766 uint64_t TargetAddress) {
767 Dyld->mapSectionAddress(LocalAddress, TargetAddress);
770 StringRef RuntimeDyld::getErrorString() {
771 return Dyld->getErrorString();
774 void RuntimeDyld::registerEHFrames() {
776 Dyld->registerEHFrames();
779 void RuntimeDyld::deregisterEHFrames() {
781 Dyld->deregisterEHFrames();
784 } // end namespace llvm