| //===-- COFFDump.cpp - COFF-specific dumper ---------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// This file implements the COFF-specific dumper for llvm-objdump. |
| /// It outputs the Win64 EH data structures as plain text. |
| /// The encoding of the unwind codes is described in MSDN: |
| /// http://msdn.microsoft.com/en-us/library/ck9asaa9.aspx |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm-objdump.h" |
| #include "llvm/Demangle/Demangle.h" |
| #include "llvm/Object/COFF.h" |
| #include "llvm/Object/COFFImportFile.h" |
| #include "llvm/Object/ObjectFile.h" |
| #include "llvm/Support/Format.h" |
| #include "llvm/Support/Win64EH.h" |
| #include "llvm/Support/WithColor.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| using namespace llvm; |
| using namespace object; |
| using namespace llvm::Win64EH; |
| |
| // Returns the name of the unwind code. |
| static StringRef getUnwindCodeTypeName(uint8_t Code) { |
| switch(Code) { |
| default: llvm_unreachable("Invalid unwind code"); |
| case UOP_PushNonVol: return "UOP_PushNonVol"; |
| case UOP_AllocLarge: return "UOP_AllocLarge"; |
| case UOP_AllocSmall: return "UOP_AllocSmall"; |
| case UOP_SetFPReg: return "UOP_SetFPReg"; |
| case UOP_SaveNonVol: return "UOP_SaveNonVol"; |
| case UOP_SaveNonVolBig: return "UOP_SaveNonVolBig"; |
| case UOP_SaveXMM128: return "UOP_SaveXMM128"; |
| case UOP_SaveXMM128Big: return "UOP_SaveXMM128Big"; |
| case UOP_PushMachFrame: return "UOP_PushMachFrame"; |
| } |
| } |
| |
| // Returns the name of a referenced register. |
| static StringRef getUnwindRegisterName(uint8_t Reg) { |
| switch(Reg) { |
| default: llvm_unreachable("Invalid register"); |
| case 0: return "RAX"; |
| case 1: return "RCX"; |
| case 2: return "RDX"; |
| case 3: return "RBX"; |
| case 4: return "RSP"; |
| case 5: return "RBP"; |
| case 6: return "RSI"; |
| case 7: return "RDI"; |
| case 8: return "R8"; |
| case 9: return "R9"; |
| case 10: return "R10"; |
| case 11: return "R11"; |
| case 12: return "R12"; |
| case 13: return "R13"; |
| case 14: return "R14"; |
| case 15: return "R15"; |
| } |
| } |
| |
| // Calculates the number of array slots required for the unwind code. |
| static unsigned getNumUsedSlots(const UnwindCode &UnwindCode) { |
| switch (UnwindCode.getUnwindOp()) { |
| default: llvm_unreachable("Invalid unwind code"); |
| case UOP_PushNonVol: |
| case UOP_AllocSmall: |
| case UOP_SetFPReg: |
| case UOP_PushMachFrame: |
| return 1; |
| case UOP_SaveNonVol: |
| case UOP_SaveXMM128: |
| return 2; |
| case UOP_SaveNonVolBig: |
| case UOP_SaveXMM128Big: |
| return 3; |
| case UOP_AllocLarge: |
| return (UnwindCode.getOpInfo() == 0) ? 2 : 3; |
| } |
| } |
| |
| // Prints one unwind code. Because an unwind code can occupy up to 3 slots in |
| // the unwind codes array, this function requires that the correct number of |
| // slots is provided. |
| static void printUnwindCode(ArrayRef<UnwindCode> UCs) { |
| assert(UCs.size() >= getNumUsedSlots(UCs[0])); |
| outs() << format(" 0x%02x: ", unsigned(UCs[0].u.CodeOffset)) |
| << getUnwindCodeTypeName(UCs[0].getUnwindOp()); |
| switch (UCs[0].getUnwindOp()) { |
| case UOP_PushNonVol: |
| outs() << " " << getUnwindRegisterName(UCs[0].getOpInfo()); |
| break; |
| case UOP_AllocLarge: |
| if (UCs[0].getOpInfo() == 0) { |
| outs() << " " << UCs[1].FrameOffset; |
| } else { |
| outs() << " " << UCs[1].FrameOffset |
| + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16); |
| } |
| break; |
| case UOP_AllocSmall: |
| outs() << " " << ((UCs[0].getOpInfo() + 1) * 8); |
| break; |
| case UOP_SetFPReg: |
| outs() << " "; |
| break; |
| case UOP_SaveNonVol: |
| outs() << " " << getUnwindRegisterName(UCs[0].getOpInfo()) |
| << format(" [0x%04x]", 8 * UCs[1].FrameOffset); |
| break; |
| case UOP_SaveNonVolBig: |
| outs() << " " << getUnwindRegisterName(UCs[0].getOpInfo()) |
| << format(" [0x%08x]", UCs[1].FrameOffset |
| + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16)); |
| break; |
| case UOP_SaveXMM128: |
| outs() << " XMM" << static_cast<uint32_t>(UCs[0].getOpInfo()) |
| << format(" [0x%04x]", 16 * UCs[1].FrameOffset); |
| break; |
| case UOP_SaveXMM128Big: |
| outs() << " XMM" << UCs[0].getOpInfo() |
| << format(" [0x%08x]", UCs[1].FrameOffset |
| + (static_cast<uint32_t>(UCs[2].FrameOffset) << 16)); |
| break; |
| case UOP_PushMachFrame: |
| outs() << " " << (UCs[0].getOpInfo() ? "w/o" : "w") |
| << " error code"; |
| break; |
| } |
| outs() << "\n"; |
| } |
| |
| static void printAllUnwindCodes(ArrayRef<UnwindCode> UCs) { |
| for (const UnwindCode *I = UCs.begin(), *E = UCs.end(); I < E; ) { |
| unsigned UsedSlots = getNumUsedSlots(*I); |
| if (UsedSlots > UCs.size()) { |
| outs() << "Unwind data corrupted: Encountered unwind op " |
| << getUnwindCodeTypeName((*I).getUnwindOp()) |
| << " which requires " << UsedSlots |
| << " slots, but only " << UCs.size() |
| << " remaining in buffer"; |
| return ; |
| } |
| printUnwindCode(makeArrayRef(I, E)); |
| I += UsedSlots; |
| } |
| } |
| |
| // Given a symbol sym this functions returns the address and section of it. |
| static std::error_code |
| resolveSectionAndAddress(const COFFObjectFile *Obj, const SymbolRef &Sym, |
| const coff_section *&ResolvedSection, |
| uint64_t &ResolvedAddr) { |
| Expected<uint64_t> ResolvedAddrOrErr = Sym.getAddress(); |
| if (!ResolvedAddrOrErr) |
| return errorToErrorCode(ResolvedAddrOrErr.takeError()); |
| ResolvedAddr = *ResolvedAddrOrErr; |
| Expected<section_iterator> Iter = Sym.getSection(); |
| if (!Iter) |
| return errorToErrorCode(Iter.takeError()); |
| ResolvedSection = Obj->getCOFFSection(**Iter); |
| return std::error_code(); |
| } |
| |
| // Given a vector of relocations for a section and an offset into this section |
| // the function returns the symbol used for the relocation at the offset. |
| static std::error_code resolveSymbol(const std::vector<RelocationRef> &Rels, |
| uint64_t Offset, SymbolRef &Sym) { |
| for (auto &R : Rels) { |
| uint64_t Ofs = R.getOffset(); |
| if (Ofs == Offset) { |
| Sym = *R.getSymbol(); |
| return std::error_code(); |
| } |
| } |
| return object_error::parse_failed; |
| } |
| |
| // Given a vector of relocations for a section and an offset into this section |
| // the function resolves the symbol used for the relocation at the offset and |
| // returns the section content and the address inside the content pointed to |
| // by the symbol. |
| static std::error_code |
| getSectionContents(const COFFObjectFile *Obj, |
| const std::vector<RelocationRef> &Rels, uint64_t Offset, |
| ArrayRef<uint8_t> &Contents, uint64_t &Addr) { |
| SymbolRef Sym; |
| if (std::error_code EC = resolveSymbol(Rels, Offset, Sym)) |
| return EC; |
| const coff_section *Section; |
| if (std::error_code EC = resolveSectionAndAddress(Obj, Sym, Section, Addr)) |
| return EC; |
| if (std::error_code EC = Obj->getSectionContents(Section, Contents)) |
| return EC; |
| return std::error_code(); |
| } |
| |
| // Given a vector of relocations for a section and an offset into this section |
| // the function returns the name of the symbol used for the relocation at the |
| // offset. |
| static std::error_code resolveSymbolName(const std::vector<RelocationRef> &Rels, |
| uint64_t Offset, StringRef &Name) { |
| SymbolRef Sym; |
| if (std::error_code EC = resolveSymbol(Rels, Offset, Sym)) |
| return EC; |
| Expected<StringRef> NameOrErr = Sym.getName(); |
| if (!NameOrErr) |
| return errorToErrorCode(NameOrErr.takeError()); |
| Name = *NameOrErr; |
| return std::error_code(); |
| } |
| |
| static void printCOFFSymbolAddress(llvm::raw_ostream &Out, |
| const std::vector<RelocationRef> &Rels, |
| uint64_t Offset, uint32_t Disp) { |
| StringRef Sym; |
| if (!resolveSymbolName(Rels, Offset, Sym)) { |
| Out << Sym; |
| if (Disp > 0) |
| Out << format(" + 0x%04x", Disp); |
| } else { |
| Out << format("0x%04x", Disp); |
| } |
| } |
| |
| static void |
| printSEHTable(const COFFObjectFile *Obj, uint32_t TableVA, int Count) { |
| if (Count == 0) |
| return; |
| |
| const pe32_header *PE32Header; |
| error(Obj->getPE32Header(PE32Header)); |
| uint32_t ImageBase = PE32Header->ImageBase; |
| uintptr_t IntPtr = 0; |
| error(Obj->getVaPtr(TableVA, IntPtr)); |
| const support::ulittle32_t *P = (const support::ulittle32_t *)IntPtr; |
| outs() << "SEH Table:"; |
| for (int I = 0; I < Count; ++I) |
| outs() << format(" 0x%x", P[I] + ImageBase); |
| outs() << "\n\n"; |
| } |
| |
| template <typename T> |
| static void printTLSDirectoryT(const coff_tls_directory<T> *TLSDir) { |
| size_t FormatWidth = sizeof(T) * 2; |
| outs() << "TLS directory:" |
| << "\n StartAddressOfRawData: " |
| << format_hex(TLSDir->StartAddressOfRawData, FormatWidth) |
| << "\n EndAddressOfRawData: " |
| << format_hex(TLSDir->EndAddressOfRawData, FormatWidth) |
| << "\n AddressOfIndex: " |
| << format_hex(TLSDir->AddressOfIndex, FormatWidth) |
| << "\n AddressOfCallBacks: " |
| << format_hex(TLSDir->AddressOfCallBacks, FormatWidth) |
| << "\n SizeOfZeroFill: " |
| << TLSDir->SizeOfZeroFill |
| << "\n Characteristics: " |
| << TLSDir->Characteristics |
| << "\n Alignment: " |
| << TLSDir->getAlignment() |
| << "\n\n"; |
| } |
| |
| static void printTLSDirectory(const COFFObjectFile *Obj) { |
| const pe32_header *PE32Header; |
| error(Obj->getPE32Header(PE32Header)); |
| |
| const pe32plus_header *PE32PlusHeader; |
| error(Obj->getPE32PlusHeader(PE32PlusHeader)); |
| |
| // Skip if it's not executable. |
| if (!PE32Header && !PE32PlusHeader) |
| return; |
| |
| const data_directory *DataDir; |
| error(Obj->getDataDirectory(COFF::TLS_TABLE, DataDir)); |
| uintptr_t IntPtr = 0; |
| if (DataDir->RelativeVirtualAddress == 0) |
| return; |
| error(Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr)); |
| |
| if (PE32Header) { |
| auto *TLSDir = reinterpret_cast<const coff_tls_directory32 *>(IntPtr); |
| printTLSDirectoryT(TLSDir); |
| } else { |
| auto *TLSDir = reinterpret_cast<const coff_tls_directory64 *>(IntPtr); |
| printTLSDirectoryT(TLSDir); |
| } |
| |
| outs() << "\n"; |
| } |
| |
| static void printLoadConfiguration(const COFFObjectFile *Obj) { |
| // Skip if it's not executable. |
| const pe32_header *PE32Header; |
| error(Obj->getPE32Header(PE32Header)); |
| if (!PE32Header) |
| return; |
| |
| // Currently only x86 is supported |
| if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_I386) |
| return; |
| |
| const data_directory *DataDir; |
| error(Obj->getDataDirectory(COFF::LOAD_CONFIG_TABLE, DataDir)); |
| uintptr_t IntPtr = 0; |
| if (DataDir->RelativeVirtualAddress == 0) |
| return; |
| error(Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr)); |
| |
| auto *LoadConf = reinterpret_cast<const coff_load_configuration32 *>(IntPtr); |
| outs() << "Load configuration:" |
| << "\n Timestamp: " << LoadConf->TimeDateStamp |
| << "\n Major Version: " << LoadConf->MajorVersion |
| << "\n Minor Version: " << LoadConf->MinorVersion |
| << "\n GlobalFlags Clear: " << LoadConf->GlobalFlagsClear |
| << "\n GlobalFlags Set: " << LoadConf->GlobalFlagsSet |
| << "\n Critical Section Default Timeout: " << LoadConf->CriticalSectionDefaultTimeout |
| << "\n Decommit Free Block Threshold: " << LoadConf->DeCommitFreeBlockThreshold |
| << "\n Decommit Total Free Threshold: " << LoadConf->DeCommitTotalFreeThreshold |
| << "\n Lock Prefix Table: " << LoadConf->LockPrefixTable |
| << "\n Maximum Allocation Size: " << LoadConf->MaximumAllocationSize |
| << "\n Virtual Memory Threshold: " << LoadConf->VirtualMemoryThreshold |
| << "\n Process Affinity Mask: " << LoadConf->ProcessAffinityMask |
| << "\n Process Heap Flags: " << LoadConf->ProcessHeapFlags |
| << "\n CSD Version: " << LoadConf->CSDVersion |
| << "\n Security Cookie: " << LoadConf->SecurityCookie |
| << "\n SEH Table: " << LoadConf->SEHandlerTable |
| << "\n SEH Count: " << LoadConf->SEHandlerCount |
| << "\n\n"; |
| printSEHTable(Obj, LoadConf->SEHandlerTable, LoadConf->SEHandlerCount); |
| outs() << "\n"; |
| } |
| |
| // Prints import tables. The import table is a table containing the list of |
| // DLL name and symbol names which will be linked by the loader. |
| static void printImportTables(const COFFObjectFile *Obj) { |
| import_directory_iterator I = Obj->import_directory_begin(); |
| import_directory_iterator E = Obj->import_directory_end(); |
| if (I == E) |
| return; |
| outs() << "The Import Tables:\n"; |
| for (const ImportDirectoryEntryRef &DirRef : Obj->import_directories()) { |
| const coff_import_directory_table_entry *Dir; |
| StringRef Name; |
| if (DirRef.getImportTableEntry(Dir)) return; |
| if (DirRef.getName(Name)) return; |
| |
| outs() << format(" lookup %08x time %08x fwd %08x name %08x addr %08x\n\n", |
| static_cast<uint32_t>(Dir->ImportLookupTableRVA), |
| static_cast<uint32_t>(Dir->TimeDateStamp), |
| static_cast<uint32_t>(Dir->ForwarderChain), |
| static_cast<uint32_t>(Dir->NameRVA), |
| static_cast<uint32_t>(Dir->ImportAddressTableRVA)); |
| outs() << " DLL Name: " << Name << "\n"; |
| outs() << " Hint/Ord Name\n"; |
| for (const ImportedSymbolRef &Entry : DirRef.imported_symbols()) { |
| bool IsOrdinal; |
| if (Entry.isOrdinal(IsOrdinal)) |
| return; |
| if (IsOrdinal) { |
| uint16_t Ordinal; |
| if (Entry.getOrdinal(Ordinal)) |
| return; |
| outs() << format(" % 6d\n", Ordinal); |
| continue; |
| } |
| uint32_t HintNameRVA; |
| if (Entry.getHintNameRVA(HintNameRVA)) |
| return; |
| uint16_t Hint; |
| StringRef Name; |
| if (Obj->getHintName(HintNameRVA, Hint, Name)) |
| return; |
| outs() << format(" % 6d ", Hint) << Name << "\n"; |
| } |
| outs() << "\n"; |
| } |
| } |
| |
| // Prints export tables. The export table is a table containing the list of |
| // exported symbol from the DLL. |
| static void printExportTable(const COFFObjectFile *Obj) { |
| outs() << "Export Table:\n"; |
| export_directory_iterator I = Obj->export_directory_begin(); |
| export_directory_iterator E = Obj->export_directory_end(); |
| if (I == E) |
| return; |
| StringRef DllName; |
| uint32_t OrdinalBase; |
| if (I->getDllName(DllName)) |
| return; |
| if (I->getOrdinalBase(OrdinalBase)) |
| return; |
| outs() << " DLL name: " << DllName << "\n"; |
| outs() << " Ordinal base: " << OrdinalBase << "\n"; |
| outs() << " Ordinal RVA Name\n"; |
| for (; I != E; I = ++I) { |
| uint32_t Ordinal; |
| if (I->getOrdinal(Ordinal)) |
| return; |
| uint32_t RVA; |
| if (I->getExportRVA(RVA)) |
| return; |
| bool IsForwarder; |
| if (I->isForwarder(IsForwarder)) |
| return; |
| |
| if (IsForwarder) { |
| // Export table entries can be used to re-export symbols that |
| // this COFF file is imported from some DLLs. This is rare. |
| // In most cases IsForwarder is false. |
| outs() << format(" % 4d ", Ordinal); |
| } else { |
| outs() << format(" % 4d %# 8x", Ordinal, RVA); |
| } |
| |
| StringRef Name; |
| if (I->getSymbolName(Name)) |
| continue; |
| if (!Name.empty()) |
| outs() << " " << Name; |
| if (IsForwarder) { |
| StringRef S; |
| if (I->getForwardTo(S)) |
| return; |
| outs() << " (forwarded to " << S << ")"; |
| } |
| outs() << "\n"; |
| } |
| } |
| |
| // Given the COFF object file, this function returns the relocations for .pdata |
| // and the pointer to "runtime function" structs. |
| static bool getPDataSection(const COFFObjectFile *Obj, |
| std::vector<RelocationRef> &Rels, |
| const RuntimeFunction *&RFStart, int &NumRFs) { |
| for (const SectionRef &Section : Obj->sections()) { |
| StringRef Name; |
| error(Section.getName(Name)); |
| if (Name != ".pdata") |
| continue; |
| |
| const coff_section *Pdata = Obj->getCOFFSection(Section); |
| for (const RelocationRef &Reloc : Section.relocations()) |
| Rels.push_back(Reloc); |
| |
| // Sort relocations by address. |
| llvm::sort(Rels, isRelocAddressLess); |
| |
| ArrayRef<uint8_t> Contents; |
| error(Obj->getSectionContents(Pdata, Contents)); |
| if (Contents.empty()) |
| continue; |
| |
| RFStart = reinterpret_cast<const RuntimeFunction *>(Contents.data()); |
| NumRFs = Contents.size() / sizeof(RuntimeFunction); |
| return true; |
| } |
| return false; |
| } |
| |
| std::error_code |
| llvm::getCOFFRelocationValueString(const COFFObjectFile *Obj, |
| const RelocationRef &Rel, |
| SmallVectorImpl<char> &Result) { |
| symbol_iterator SymI = Rel.getSymbol(); |
| Expected<StringRef> SymNameOrErr = SymI->getName(); |
| if (!SymNameOrErr) |
| return errorToErrorCode(SymNameOrErr.takeError()); |
| StringRef SymName = *SymNameOrErr; |
| Result.append(SymName.begin(), SymName.end()); |
| return std::error_code(); |
| } |
| |
| static void printWin64EHUnwindInfo(const Win64EH::UnwindInfo *UI) { |
| // The casts to int are required in order to output the value as number. |
| // Without the casts the value would be interpreted as char data (which |
| // results in garbage output). |
| outs() << " Version: " << static_cast<int>(UI->getVersion()) << "\n"; |
| outs() << " Flags: " << static_cast<int>(UI->getFlags()); |
| if (UI->getFlags()) { |
| if (UI->getFlags() & UNW_ExceptionHandler) |
| outs() << " UNW_ExceptionHandler"; |
| if (UI->getFlags() & UNW_TerminateHandler) |
| outs() << " UNW_TerminateHandler"; |
| if (UI->getFlags() & UNW_ChainInfo) |
| outs() << " UNW_ChainInfo"; |
| } |
| outs() << "\n"; |
| outs() << " Size of prolog: " << static_cast<int>(UI->PrologSize) << "\n"; |
| outs() << " Number of Codes: " << static_cast<int>(UI->NumCodes) << "\n"; |
| // Maybe this should move to output of UOP_SetFPReg? |
| if (UI->getFrameRegister()) { |
| outs() << " Frame register: " |
| << getUnwindRegisterName(UI->getFrameRegister()) << "\n"; |
| outs() << " Frame offset: " << 16 * UI->getFrameOffset() << "\n"; |
| } else { |
| outs() << " No frame pointer used\n"; |
| } |
| if (UI->getFlags() & (UNW_ExceptionHandler | UNW_TerminateHandler)) { |
| // FIXME: Output exception handler data |
| } else if (UI->getFlags() & UNW_ChainInfo) { |
| // FIXME: Output chained unwind info |
| } |
| |
| if (UI->NumCodes) |
| outs() << " Unwind Codes:\n"; |
| |
| printAllUnwindCodes(makeArrayRef(&UI->UnwindCodes[0], UI->NumCodes)); |
| |
| outs() << "\n"; |
| outs().flush(); |
| } |
| |
| /// Prints out the given RuntimeFunction struct for x64, assuming that Obj is |
| /// pointing to an executable file. |
| static void printRuntimeFunction(const COFFObjectFile *Obj, |
| const RuntimeFunction &RF) { |
| if (!RF.StartAddress) |
| return; |
| outs() << "Function Table:\n" |
| << format(" Start Address: 0x%04x\n", |
| static_cast<uint32_t>(RF.StartAddress)) |
| << format(" End Address: 0x%04x\n", |
| static_cast<uint32_t>(RF.EndAddress)) |
| << format(" Unwind Info Address: 0x%04x\n", |
| static_cast<uint32_t>(RF.UnwindInfoOffset)); |
| uintptr_t addr; |
| if (Obj->getRvaPtr(RF.UnwindInfoOffset, addr)) |
| return; |
| printWin64EHUnwindInfo(reinterpret_cast<const Win64EH::UnwindInfo *>(addr)); |
| } |
| |
| /// Prints out the given RuntimeFunction struct for x64, assuming that Obj is |
| /// pointing to an object file. Unlike executable, fields in RuntimeFunction |
| /// struct are filled with zeros, but instead there are relocations pointing to |
| /// them so that the linker will fill targets' RVAs to the fields at link |
| /// time. This function interprets the relocations to find the data to be used |
| /// in the resulting executable. |
| static void printRuntimeFunctionRels(const COFFObjectFile *Obj, |
| const RuntimeFunction &RF, |
| uint64_t SectionOffset, |
| const std::vector<RelocationRef> &Rels) { |
| outs() << "Function Table:\n"; |
| outs() << " Start Address: "; |
| printCOFFSymbolAddress(outs(), Rels, |
| SectionOffset + |
| /*offsetof(RuntimeFunction, StartAddress)*/ 0, |
| RF.StartAddress); |
| outs() << "\n"; |
| |
| outs() << " End Address: "; |
| printCOFFSymbolAddress(outs(), Rels, |
| SectionOffset + |
| /*offsetof(RuntimeFunction, EndAddress)*/ 4, |
| RF.EndAddress); |
| outs() << "\n"; |
| |
| outs() << " Unwind Info Address: "; |
| printCOFFSymbolAddress(outs(), Rels, |
| SectionOffset + |
| /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8, |
| RF.UnwindInfoOffset); |
| outs() << "\n"; |
| |
| ArrayRef<uint8_t> XContents; |
| uint64_t UnwindInfoOffset = 0; |
| error(getSectionContents( |
| Obj, Rels, SectionOffset + |
| /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8, |
| XContents, UnwindInfoOffset)); |
| if (XContents.empty()) |
| return; |
| |
| UnwindInfoOffset += RF.UnwindInfoOffset; |
| if (UnwindInfoOffset > XContents.size()) |
| return; |
| |
| auto *UI = reinterpret_cast<const Win64EH::UnwindInfo *>(XContents.data() + |
| UnwindInfoOffset); |
| printWin64EHUnwindInfo(UI); |
| } |
| |
| void llvm::printCOFFUnwindInfo(const COFFObjectFile *Obj) { |
| if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_AMD64) { |
| WithColor::error(errs(), "llvm-objdump") |
| << "unsupported image machine type " |
| "(currently only AMD64 is supported).\n"; |
| return; |
| } |
| |
| std::vector<RelocationRef> Rels; |
| const RuntimeFunction *RFStart; |
| int NumRFs; |
| if (!getPDataSection(Obj, Rels, RFStart, NumRFs)) |
| return; |
| ArrayRef<RuntimeFunction> RFs(RFStart, NumRFs); |
| |
| bool IsExecutable = Rels.empty(); |
| if (IsExecutable) { |
| for (const RuntimeFunction &RF : RFs) |
| printRuntimeFunction(Obj, RF); |
| return; |
| } |
| |
| for (const RuntimeFunction &RF : RFs) { |
| uint64_t SectionOffset = |
| std::distance(RFs.begin(), &RF) * sizeof(RuntimeFunction); |
| printRuntimeFunctionRels(Obj, RF, SectionOffset, Rels); |
| } |
| } |
| |
| void llvm::printCOFFFileHeader(const object::ObjectFile *Obj) { |
| const COFFObjectFile *file = dyn_cast<const COFFObjectFile>(Obj); |
| printTLSDirectory(file); |
| printLoadConfiguration(file); |
| printImportTables(file); |
| printExportTable(file); |
| } |
| |
| void llvm::printCOFFSymbolTable(const object::COFFImportFile *i) { |
| unsigned Index = 0; |
| bool IsCode = i->getCOFFImportHeader()->getType() == COFF::IMPORT_CODE; |
| |
| for (const object::BasicSymbolRef &Sym : i->symbols()) { |
| std::string Name; |
| raw_string_ostream NS(Name); |
| |
| Sym.printName(NS); |
| NS.flush(); |
| |
| outs() << "[" << format("%2d", Index) << "]" |
| << "(sec " << format("%2d", 0) << ")" |
| << "(fl 0x00)" // Flag bits, which COFF doesn't have. |
| << "(ty " << format("%3x", (IsCode && Index) ? 32 : 0) << ")" |
| << "(scl " << format("%3x", 0) << ") " |
| << "(nx " << 0 << ") " |
| << "0x" << format("%08x", 0) << " " << Name << '\n'; |
| |
| ++Index; |
| } |
| } |
| |
| void llvm::printCOFFSymbolTable(const COFFObjectFile *coff) { |
| for (unsigned SI = 0, SE = coff->getNumberOfSymbols(); SI != SE; ++SI) { |
| Expected<COFFSymbolRef> Symbol = coff->getSymbol(SI); |
| StringRef Name; |
| error(errorToErrorCode(Symbol.takeError())); |
| error(coff->getSymbolName(*Symbol, Name)); |
| |
| outs() << "[" << format("%2d", SI) << "]" |
| << "(sec " << format("%2d", int(Symbol->getSectionNumber())) << ")" |
| << "(fl 0x00)" // Flag bits, which COFF doesn't have. |
| << "(ty " << format("%3x", unsigned(Symbol->getType())) << ")" |
| << "(scl " << format("%3x", unsigned(Symbol->getStorageClass())) |
| << ") " |
| << "(nx " << unsigned(Symbol->getNumberOfAuxSymbols()) << ") " |
| << "0x" << format("%08x", unsigned(Symbol->getValue())) << " " |
| << Name; |
| if (Demangle && Name.startswith("?")) { |
| char *DemangledSymbol = nullptr; |
| size_t Size = 0; |
| int Status = -1; |
| DemangledSymbol = |
| microsoftDemangle(Name.data(), DemangledSymbol, &Size, &Status); |
| |
| if (Status == 0 && DemangledSymbol) { |
| outs() << " (" << StringRef(DemangledSymbol) << ")"; |
| std::free(DemangledSymbol); |
| } else { |
| outs() << " (invalid mangled name)"; |
| } |
| } |
| outs() << "\n"; |
| |
| for (unsigned AI = 0, AE = Symbol->getNumberOfAuxSymbols(); AI < AE; ++AI, ++SI) { |
| if (Symbol->isSectionDefinition()) { |
| const coff_aux_section_definition *asd; |
| error(coff->getAuxSymbol<coff_aux_section_definition>(SI + 1, asd)); |
| |
| int32_t AuxNumber = asd->getNumber(Symbol->isBigObj()); |
| |
| outs() << "AUX " |
| << format("scnlen 0x%x nreloc %d nlnno %d checksum 0x%x " |
| , unsigned(asd->Length) |
| , unsigned(asd->NumberOfRelocations) |
| , unsigned(asd->NumberOfLinenumbers) |
| , unsigned(asd->CheckSum)) |
| << format("assoc %d comdat %d\n" |
| , unsigned(AuxNumber) |
| , unsigned(asd->Selection)); |
| } else if (Symbol->isFileRecord()) { |
| const char *FileName; |
| error(coff->getAuxSymbol<char>(SI + 1, FileName)); |
| |
| StringRef Name(FileName, Symbol->getNumberOfAuxSymbols() * |
| coff->getSymbolTableEntrySize()); |
| outs() << "AUX " << Name.rtrim(StringRef("\0", 1)) << '\n'; |
| |
| SI = SI + Symbol->getNumberOfAuxSymbols(); |
| break; |
| } else if (Symbol->isWeakExternal()) { |
| const coff_aux_weak_external *awe; |
| error(coff->getAuxSymbol<coff_aux_weak_external>(SI + 1, awe)); |
| |
| outs() << "AUX " << format("indx %d srch %d\n", |
| static_cast<uint32_t>(awe->TagIndex), |
| static_cast<uint32_t>(awe->Characteristics)); |
| } else { |
| outs() << "AUX Unknown\n"; |
| } |
| } |
| } |
| } |
