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-rw-r--r--llvm/tools/llvm-objdump/COFFDump.cpp738
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diff --git a/llvm/tools/llvm-objdump/COFFDump.cpp b/llvm/tools/llvm-objdump/COFFDump.cpp
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+++ b/llvm/tools/llvm-objdump/COFFDump.cpp
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+//===-- 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::object;
+using namespace llvm::Win64EH;
+
+namespace llvm {
+// 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 Error resolveSectionAndAddress(const COFFObjectFile *Obj,
+ const SymbolRef &Sym,
+ const coff_section *&ResolvedSection,
+ uint64_t &ResolvedAddr) {
+ Expected<uint64_t> ResolvedAddrOrErr = Sym.getAddress();
+ if (!ResolvedAddrOrErr)
+ return ResolvedAddrOrErr.takeError();
+ ResolvedAddr = *ResolvedAddrOrErr;
+ Expected<section_iterator> Iter = Sym.getSection();
+ if (!Iter)
+ return Iter.takeError();
+ ResolvedSection = Obj->getCOFFSection(**Iter);
+ return Error::success();
+}
+
+// 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 Error 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 Error::success();
+ }
+ }
+ return make_error<BinaryError>();
+}
+
+// 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 Error
+getSectionContents(const COFFObjectFile *Obj,
+ const std::vector<RelocationRef> &Rels, uint64_t Offset,
+ ArrayRef<uint8_t> &Contents, uint64_t &Addr) {
+ SymbolRef Sym;
+ if (Error E = resolveSymbol(Rels, Offset, Sym))
+ return E;
+ const coff_section *Section;
+ if (Error E = resolveSectionAndAddress(Obj, Sym, Section, Addr))
+ return E;
+ return Obj->getSectionContents(Section, Contents);
+}
+
+// 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 Error resolveSymbolName(const std::vector<RelocationRef> &Rels,
+ uint64_t Offset, StringRef &Name) {
+ SymbolRef Sym;
+ if (Error EC = resolveSymbol(Rels, Offset, Sym))
+ return EC;
+ Expected<StringRef> NameOrErr = Sym.getName();
+ if (!NameOrErr)
+ return NameOrErr.takeError();
+ Name = *NameOrErr;
+ return Error::success();
+}
+
+static void printCOFFSymbolAddress(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;
+
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = Obj->getVaPtr(TableVA, IntPtr))
+ reportError(errorCodeToError(EC), Obj->getFileName());
+
+ 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] + Obj->getPE32Header()->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 = Obj->getPE32Header();
+ const pe32plus_header *PE32PlusHeader = Obj->getPE32PlusHeader();
+
+ // Skip if it's not executable.
+ if (!PE32Header && !PE32PlusHeader)
+ return;
+
+ const data_directory *DataDir;
+ if (std::error_code EC = Obj->getDataDirectory(COFF::TLS_TABLE, DataDir))
+ reportError(errorCodeToError(EC), Obj->getFileName());
+
+ if (DataDir->RelativeVirtualAddress == 0)
+ return;
+
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC =
+ Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr))
+ reportError(errorCodeToError(EC), Obj->getFileName());
+
+ 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.
+ if (!Obj->getPE32Header())
+ return;
+
+ // Currently only x86 is supported
+ if (Obj->getMachine() != COFF::IMAGE_FILE_MACHINE_I386)
+ return;
+
+ const data_directory *DataDir;
+
+ if (std::error_code EC =
+ Obj->getDataDirectory(COFF::LOAD_CONFIG_TABLE, DataDir))
+ reportError(errorCodeToError(EC), Obj->getFileName());
+
+ uintptr_t IntPtr = 0;
+ if (DataDir->RelativeVirtualAddress == 0)
+ return;
+
+ if (std::error_code EC =
+ Obj->getRvaPtr(DataDir->RelativeVirtualAddress, IntPtr))
+ reportError(errorCodeToError(EC), Obj->getFileName());
+
+ 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 = unwrapOrError(Section.getName(), Obj->getFileName());
+ 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;
+ if (Error E = Obj->getSectionContents(Pdata, Contents))
+ reportError(std::move(E), Obj->getFileName());
+
+ if (Contents.empty())
+ continue;
+
+ RFStart = reinterpret_cast<const RuntimeFunction *>(Contents.data());
+ NumRFs = Contents.size() / sizeof(RuntimeFunction);
+ return true;
+ }
+ return false;
+}
+
+Error getCOFFRelocationValueString(const COFFObjectFile *Obj,
+ const RelocationRef &Rel,
+ SmallVectorImpl<char> &Result) {
+ symbol_iterator SymI = Rel.getSymbol();
+ Expected<StringRef> SymNameOrErr = SymI->getName();
+ if (!SymNameOrErr)
+ return SymNameOrErr.takeError();
+ StringRef SymName = *SymNameOrErr;
+ Result.append(SymName.begin(), SymName.end());
+ return Error::success();
+}
+
+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;
+ if (Error E = getSectionContents(
+ Obj, Rels,
+ SectionOffset +
+ /*offsetof(RuntimeFunction, UnwindInfoOffset)*/ 8,
+ XContents, UnwindInfoOffset))
+ reportError(std::move(E), Obj->getFileName());
+ 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 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 printCOFFFileHeader(const object::ObjectFile *Obj) {
+ const COFFObjectFile *file = dyn_cast<const COFFObjectFile>(Obj);
+ printTLSDirectory(file);
+ printLoadConfiguration(file);
+ printImportTables(file);
+ printExportTable(file);
+}
+
+void 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);
+
+ cantFail(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 printCOFFSymbolTable(const COFFObjectFile *coff) {
+ for (unsigned SI = 0, SE = coff->getNumberOfSymbols(); SI != SE; ++SI) {
+ Expected<COFFSymbolRef> Symbol = coff->getSymbol(SI);
+ if (!Symbol)
+ reportError(Symbol.takeError(), coff->getFileName());
+
+ StringRef Name;
+ if (std::error_code EC = coff->getSymbolName(*Symbol, Name))
+ reportError(errorCodeToError(EC), coff->getFileName());
+
+ 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;
+ if (std::error_code EC =
+ coff->getAuxSymbol<coff_aux_section_definition>(SI + 1, asd))
+ reportError(errorCodeToError(EC), coff->getFileName());
+
+ 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;
+ if (std::error_code EC = coff->getAuxSymbol<char>(SI + 1, FileName))
+ reportError(errorCodeToError(EC), coff->getFileName());
+
+ 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;
+ if (std::error_code EC =
+ coff->getAuxSymbol<coff_aux_weak_external>(SI + 1, awe))
+ reportError(errorCodeToError(EC), coff->getFileName());
+
+ 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";
+ }
+ }
+ }
+}
+} // namespace llvm
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 03:30:17 +0000