522 lines
19 KiB
C++
522 lines
19 KiB
C++
//===-- XCOFFDumper.cpp - XCOFF dumping utility -----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements an XCOFF specific dumper for llvm-readobj.
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//
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//===----------------------------------------------------------------------===//
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#include "ObjDumper.h"
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#include "llvm-readobj.h"
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#include "llvm/Object/XCOFFObjectFile.h"
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#include "llvm/Support/ScopedPrinter.h"
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using namespace llvm;
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using namespace object;
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namespace {
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class XCOFFDumper : public ObjDumper {
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public:
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XCOFFDumper(const XCOFFObjectFile &Obj, ScopedPrinter &Writer)
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: ObjDumper(Writer, Obj.getFileName()), Obj(Obj) {}
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void printFileHeaders() override;
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void printSectionHeaders() override;
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void printRelocations() override;
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void printSymbols() override;
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void printDynamicSymbols() override;
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void printUnwindInfo() override;
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void printStackMap() const override;
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void printNeededLibraries() override;
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private:
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template <typename T> void printSectionHeaders(ArrayRef<T> Sections);
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template <typename T> void printGenericSectionHeader(T &Sec) const;
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template <typename T> void printOverflowSectionHeader(T &Sec) const;
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void printFileAuxEnt(const XCOFFFileAuxEnt *AuxEntPtr);
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void printCsectAuxEnt32(const XCOFFCsectAuxEnt32 *AuxEntPtr);
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void printSectAuxEntForStat(const XCOFFSectAuxEntForStat *AuxEntPtr);
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void printSymbol(const SymbolRef &);
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void printRelocations(ArrayRef<XCOFFSectionHeader32> Sections);
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const XCOFFObjectFile &Obj;
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};
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} // anonymous namespace
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void XCOFFDumper::printFileHeaders() {
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DictScope DS(W, "FileHeader");
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W.printHex("Magic", Obj.getMagic());
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W.printNumber("NumberOfSections", Obj.getNumberOfSections());
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// Negative timestamp values are reserved for future use.
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int32_t TimeStamp = Obj.getTimeStamp();
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if (TimeStamp > 0) {
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// This handling of the time stamp assumes that the host system's time_t is
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// compatible with AIX time_t. If a platform is not compatible, the lit
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// tests will let us know.
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time_t TimeDate = TimeStamp;
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char FormattedTime[21] = {};
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size_t BytesWritten =
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strftime(FormattedTime, 21, "%Y-%m-%dT%H:%M:%SZ", gmtime(&TimeDate));
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if (BytesWritten)
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W.printHex("TimeStamp", FormattedTime, TimeStamp);
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else
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W.printHex("Timestamp", TimeStamp);
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} else {
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W.printHex("TimeStamp", TimeStamp == 0 ? "None" : "Reserved Value",
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TimeStamp);
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}
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// The number of symbol table entries is an unsigned value in 64-bit objects
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// and a signed value (with negative values being 'reserved') in 32-bit
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// objects.
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if (Obj.is64Bit()) {
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W.printHex("SymbolTableOffset", Obj.getSymbolTableOffset64());
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W.printNumber("SymbolTableEntries", Obj.getNumberOfSymbolTableEntries64());
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} else {
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W.printHex("SymbolTableOffset", Obj.getSymbolTableOffset32());
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int32_t SymTabEntries = Obj.getRawNumberOfSymbolTableEntries32();
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if (SymTabEntries >= 0)
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W.printNumber("SymbolTableEntries", SymTabEntries);
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else
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W.printHex("SymbolTableEntries", "Reserved Value", SymTabEntries);
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}
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W.printHex("OptionalHeaderSize", Obj.getOptionalHeaderSize());
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W.printHex("Flags", Obj.getFlags());
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// TODO FIXME Add support for the auxiliary header (if any) once
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// XCOFFObjectFile has the necessary support.
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}
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void XCOFFDumper::printSectionHeaders() {
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if (Obj.is64Bit())
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printSectionHeaders(Obj.sections64());
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else
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printSectionHeaders(Obj.sections32());
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}
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void XCOFFDumper::printRelocations() {
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if (Obj.is64Bit())
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llvm_unreachable("64-bit relocation output not implemented!");
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else
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printRelocations(Obj.sections32());
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}
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static const EnumEntry<XCOFF::RelocationType> RelocationTypeNameclass[] = {
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#define ECase(X) \
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{ #X, XCOFF::X }
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ECase(R_POS), ECase(R_RL), ECase(R_RLA), ECase(R_NEG),
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ECase(R_REL), ECase(R_TOC), ECase(R_TRL), ECase(R_TRLA),
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ECase(R_GL), ECase(R_TCL), ECase(R_REF), ECase(R_BA),
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ECase(R_BR), ECase(R_RBA), ECase(R_RBR), ECase(R_TLS),
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ECase(R_TLS_IE), ECase(R_TLS_LD), ECase(R_TLS_LE), ECase(R_TLSM),
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ECase(R_TLSML), ECase(R_TOCU), ECase(R_TOCL)
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#undef ECase
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};
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void XCOFFDumper::printRelocations(ArrayRef<XCOFFSectionHeader32> Sections) {
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if (!opts::ExpandRelocs)
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report_fatal_error("Unexpanded relocation output not implemented.");
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ListScope LS(W, "Relocations");
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uint16_t Index = 0;
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for (const auto &Sec : Sections) {
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++Index;
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// Only the .text, .data, .tdata, and STYP_DWARF sections have relocation.
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if (Sec.Flags != XCOFF::STYP_TEXT && Sec.Flags != XCOFF::STYP_DATA &&
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Sec.Flags != XCOFF::STYP_TDATA && Sec.Flags != XCOFF::STYP_DWARF)
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continue;
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auto Relocations = unwrapOrError(Obj.getFileName(), Obj.relocations(Sec));
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if (Relocations.empty())
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continue;
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W.startLine() << "Section (index: " << Index << ") " << Sec.getName()
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<< " {\n";
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for (auto Reloc : Relocations) {
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StringRef SymbolName = unwrapOrError(
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Obj.getFileName(), Obj.getSymbolNameByIndex(Reloc.SymbolIndex));
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DictScope RelocScope(W, "Relocation");
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W.printHex("Virtual Address", Reloc.VirtualAddress);
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W.printNumber("Symbol", SymbolName, Reloc.SymbolIndex);
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W.printString("IsSigned", Reloc.isRelocationSigned() ? "Yes" : "No");
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W.printNumber("FixupBitValue", Reloc.isFixupIndicated() ? 1 : 0);
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W.printNumber("Length", Reloc.getRelocatedLength());
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W.printEnum("Type", (uint8_t)Reloc.Type,
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makeArrayRef(RelocationTypeNameclass));
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}
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W.unindent();
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W.startLine() << "}\n";
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}
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}
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static const EnumEntry<XCOFF::CFileStringType> FileStringType[] = {
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#define ECase(X) \
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{ #X, XCOFF::X }
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ECase(XFT_FN), ECase(XFT_CT), ECase(XFT_CV), ECase(XFT_CD)
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#undef ECase
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};
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void XCOFFDumper::printFileAuxEnt(const XCOFFFileAuxEnt *AuxEntPtr) {
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if (Obj.is64Bit())
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report_fatal_error(
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"Printing for File Auxiliary Entry in 64-bit is unimplemented.");
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StringRef FileName =
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unwrapOrError(Obj.getFileName(), Obj.getCFileName(AuxEntPtr));
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DictScope SymDs(W, "File Auxiliary Entry");
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W.printNumber("Index",
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Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
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W.printString("Name", FileName);
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W.printEnum("Type", static_cast<uint8_t>(AuxEntPtr->Type),
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makeArrayRef(FileStringType));
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}
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static const EnumEntry<XCOFF::StorageMappingClass> CsectStorageMappingClass[] =
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{
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#define ECase(X) \
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{ #X, XCOFF::X }
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ECase(XMC_PR), ECase(XMC_RO), ECase(XMC_DB),
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ECase(XMC_GL), ECase(XMC_XO), ECase(XMC_SV),
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ECase(XMC_SV64), ECase(XMC_SV3264), ECase(XMC_TI),
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ECase(XMC_TB), ECase(XMC_RW), ECase(XMC_TC0),
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ECase(XMC_TC), ECase(XMC_TD), ECase(XMC_DS),
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ECase(XMC_UA), ECase(XMC_BS), ECase(XMC_UC),
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ECase(XMC_TL), ECase(XMC_TE)
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#undef ECase
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};
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static const EnumEntry<XCOFF::SymbolType> CsectSymbolTypeClass[] = {
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#define ECase(X) \
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{ #X, XCOFF::X }
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ECase(XTY_ER), ECase(XTY_SD), ECase(XTY_LD), ECase(XTY_CM)
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#undef ECase
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};
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void XCOFFDumper::printCsectAuxEnt32(const XCOFFCsectAuxEnt32 *AuxEntPtr) {
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assert(!Obj.is64Bit() && "32-bit interface called on 64-bit object file.");
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DictScope SymDs(W, "CSECT Auxiliary Entry");
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W.printNumber("Index",
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Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
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if (AuxEntPtr->isLabel())
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W.printNumber("ContainingCsectSymbolIndex", AuxEntPtr->SectionOrLength);
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else
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W.printNumber("SectionLen", AuxEntPtr->SectionOrLength);
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W.printHex("ParameterHashIndex", AuxEntPtr->ParameterHashIndex);
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W.printHex("TypeChkSectNum", AuxEntPtr->TypeChkSectNum);
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// Print out symbol alignment and type.
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W.printNumber("SymbolAlignmentLog2", AuxEntPtr->getAlignmentLog2());
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W.printEnum("SymbolType", AuxEntPtr->getSymbolType(),
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makeArrayRef(CsectSymbolTypeClass));
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W.printEnum("StorageMappingClass",
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static_cast<uint8_t>(AuxEntPtr->StorageMappingClass),
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makeArrayRef(CsectStorageMappingClass));
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W.printHex("StabInfoIndex", AuxEntPtr->StabInfoIndex);
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W.printHex("StabSectNum", AuxEntPtr->StabSectNum);
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}
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void XCOFFDumper::printSectAuxEntForStat(
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const XCOFFSectAuxEntForStat *AuxEntPtr) {
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assert(!Obj.is64Bit() && "32-bit interface called on 64-bit object file.");
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DictScope SymDs(W, "Sect Auxiliary Entry For Stat");
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W.printNumber("Index",
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Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(AuxEntPtr)));
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W.printNumber("SectionLength", AuxEntPtr->SectionLength);
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// Unlike the corresponding fields in the section header, NumberOfRelocEnt
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// and NumberOfLineNum do not handle values greater than 65535.
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W.printNumber("NumberOfRelocEnt", AuxEntPtr->NumberOfRelocEnt);
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W.printNumber("NumberOfLineNum", AuxEntPtr->NumberOfLineNum);
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}
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static const EnumEntry<XCOFF::StorageClass> SymStorageClass[] = {
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#define ECase(X) \
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{ #X, XCOFF::X }
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ECase(C_NULL), ECase(C_AUTO), ECase(C_EXT), ECase(C_STAT),
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ECase(C_REG), ECase(C_EXTDEF), ECase(C_LABEL), ECase(C_ULABEL),
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ECase(C_MOS), ECase(C_ARG), ECase(C_STRTAG), ECase(C_MOU),
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ECase(C_UNTAG), ECase(C_TPDEF), ECase(C_USTATIC), ECase(C_ENTAG),
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ECase(C_MOE), ECase(C_REGPARM), ECase(C_FIELD), ECase(C_BLOCK),
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ECase(C_FCN), ECase(C_EOS), ECase(C_FILE), ECase(C_LINE),
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ECase(C_ALIAS), ECase(C_HIDDEN), ECase(C_HIDEXT), ECase(C_BINCL),
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ECase(C_EINCL), ECase(C_INFO), ECase(C_WEAKEXT), ECase(C_DWARF),
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ECase(C_GSYM), ECase(C_LSYM), ECase(C_PSYM), ECase(C_RSYM),
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ECase(C_RPSYM), ECase(C_STSYM), ECase(C_TCSYM), ECase(C_BCOMM),
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ECase(C_ECOML), ECase(C_ECOMM), ECase(C_DECL), ECase(C_ENTRY),
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ECase(C_FUN), ECase(C_BSTAT), ECase(C_ESTAT), ECase(C_GTLS),
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ECase(C_STTLS), ECase(C_EFCN)
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#undef ECase
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};
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static StringRef GetSymbolValueName(XCOFF::StorageClass SC) {
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switch (SC) {
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case XCOFF::C_EXT:
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case XCOFF::C_WEAKEXT:
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case XCOFF::C_HIDEXT:
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case XCOFF::C_STAT:
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return "Value (RelocatableAddress)";
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case XCOFF::C_FILE:
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return "Value (SymbolTableIndex)";
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case XCOFF::C_FCN:
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case XCOFF::C_BLOCK:
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case XCOFF::C_FUN:
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case XCOFF::C_STSYM:
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case XCOFF::C_BINCL:
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case XCOFF::C_EINCL:
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case XCOFF::C_INFO:
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case XCOFF::C_BSTAT:
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case XCOFF::C_LSYM:
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case XCOFF::C_PSYM:
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case XCOFF::C_RPSYM:
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case XCOFF::C_RSYM:
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case XCOFF::C_ECOML:
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case XCOFF::C_DWARF:
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assert(false && "This StorageClass for the symbol is not yet implemented.");
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return "";
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default:
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return "Value";
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}
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}
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static const EnumEntry<XCOFF::CFileLangId> CFileLangIdClass[] = {
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#define ECase(X) \
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{ #X, XCOFF::X }
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ECase(TB_C), ECase(TB_CPLUSPLUS)
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#undef ECase
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};
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static const EnumEntry<XCOFF::CFileCpuId> CFileCpuIdClass[] = {
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#define ECase(X) \
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{ #X, XCOFF::X }
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ECase(TCPU_PPC64), ECase(TCPU_COM), ECase(TCPU_970)
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#undef ECase
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};
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void XCOFFDumper::printSymbol(const SymbolRef &S) {
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if (Obj.is64Bit())
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report_fatal_error("64-bit support is unimplemented.");
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DataRefImpl SymbolDRI = S.getRawDataRefImpl();
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const XCOFFSymbolEntry *SymbolEntPtr = Obj.toSymbolEntry(SymbolDRI);
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XCOFFSymbolRef XCOFFSymRef(SymbolDRI, &Obj);
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uint8_t NumberOfAuxEntries = XCOFFSymRef.getNumberOfAuxEntries();
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DictScope SymDs(W, "Symbol");
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StringRef SymbolName =
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unwrapOrError(Obj.getFileName(), Obj.getSymbolName(SymbolDRI));
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W.printNumber("Index",
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Obj.getSymbolIndex(reinterpret_cast<uintptr_t>(SymbolEntPtr)));
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W.printString("Name", SymbolName);
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W.printHex(GetSymbolValueName(SymbolEntPtr->StorageClass),
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SymbolEntPtr->Value);
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StringRef SectionName =
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unwrapOrError(Obj.getFileName(), Obj.getSymbolSectionName(SymbolEntPtr));
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W.printString("Section", SectionName);
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if (XCOFFSymRef.getStorageClass() == XCOFF::C_FILE) {
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W.printEnum("Source Language ID",
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SymbolEntPtr->CFileLanguageIdAndTypeId.LanguageId,
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makeArrayRef(CFileLangIdClass));
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W.printEnum("CPU Version ID",
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SymbolEntPtr->CFileLanguageIdAndTypeId.CpuTypeId,
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makeArrayRef(CFileCpuIdClass));
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} else
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W.printHex("Type", SymbolEntPtr->SymbolType);
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W.printEnum("StorageClass", static_cast<uint8_t>(SymbolEntPtr->StorageClass),
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makeArrayRef(SymStorageClass));
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W.printNumber("NumberOfAuxEntries", SymbolEntPtr->NumberOfAuxEntries);
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if (NumberOfAuxEntries == 0)
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return;
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switch (XCOFFSymRef.getStorageClass()) {
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case XCOFF::C_FILE:
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// If the symbol is C_FILE and has auxiliary entries...
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for (int i = 1; i <= NumberOfAuxEntries; i++) {
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const XCOFFFileAuxEnt *FileAuxEntPtr =
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reinterpret_cast<const XCOFFFileAuxEnt *>(SymbolEntPtr + i);
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#ifndef NDEBUG
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Obj.checkSymbolEntryPointer(reinterpret_cast<uintptr_t>(FileAuxEntPtr));
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#endif
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printFileAuxEnt(FileAuxEntPtr);
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}
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break;
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case XCOFF::C_EXT:
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case XCOFF::C_WEAKEXT:
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case XCOFF::C_HIDEXT:
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// If the symbol is for a function, and it has more than 1 auxiliary entry,
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// then one of them must be function auxiliary entry which we do not
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// support yet.
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if (XCOFFSymRef.isFunction() && NumberOfAuxEntries >= 2)
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report_fatal_error("Function auxiliary entry printing is unimplemented.");
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// If there is more than 1 auxiliary entry, instead of printing out
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// error information, print out the raw Auxiliary entry from 1st till
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// the last - 1. The last one must be a CSECT Auxiliary Entry.
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for (int i = 1; i < NumberOfAuxEntries; i++) {
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W.startLine() << "!Unexpected raw auxiliary entry data:\n";
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W.startLine() << format_bytes(
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ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(SymbolEntPtr + i),
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XCOFF::SymbolTableEntrySize));
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}
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// The symbol's last auxiliary entry is a CSECT Auxiliary Entry.
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printCsectAuxEnt32(XCOFFSymRef.getXCOFFCsectAuxEnt32());
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break;
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case XCOFF::C_STAT:
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if (NumberOfAuxEntries > 1)
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report_fatal_error(
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"C_STAT symbol should not have more than 1 auxiliary entry.");
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const XCOFFSectAuxEntForStat *StatAuxEntPtr;
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StatAuxEntPtr =
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reinterpret_cast<const XCOFFSectAuxEntForStat *>(SymbolEntPtr + 1);
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#ifndef NDEBUG
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Obj.checkSymbolEntryPointer(reinterpret_cast<uintptr_t>(StatAuxEntPtr));
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#endif
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printSectAuxEntForStat(StatAuxEntPtr);
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break;
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case XCOFF::C_DWARF:
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case XCOFF::C_BLOCK:
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case XCOFF::C_FCN:
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report_fatal_error("Symbol table entry printing for this storage class "
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"type is unimplemented.");
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break;
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default:
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for (int i = 1; i <= NumberOfAuxEntries; i++) {
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W.startLine() << "!Unexpected raw auxiliary entry data:\n";
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W.startLine() << format_bytes(
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ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(SymbolEntPtr + i),
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XCOFF::SymbolTableEntrySize));
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}
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break;
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}
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}
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void XCOFFDumper::printSymbols() {
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ListScope Group(W, "Symbols");
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for (const SymbolRef &S : Obj.symbols())
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printSymbol(S);
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}
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void XCOFFDumper::printDynamicSymbols() {
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llvm_unreachable("Unimplemented functionality for XCOFFDumper");
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}
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void XCOFFDumper::printUnwindInfo() {
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llvm_unreachable("Unimplemented functionality for XCOFFDumper");
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}
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void XCOFFDumper::printStackMap() const {
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llvm_unreachable("Unimplemented functionality for XCOFFDumper");
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}
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void XCOFFDumper::printNeededLibraries() {
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llvm_unreachable("Unimplemented functionality for XCOFFDumper");
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}
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static const EnumEntry<XCOFF::SectionTypeFlags> SectionTypeFlagsNames[] = {
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#define ECase(X) \
|
|
{ #X, XCOFF::X }
|
|
ECase(STYP_PAD), ECase(STYP_DWARF), ECase(STYP_TEXT),
|
|
ECase(STYP_DATA), ECase(STYP_BSS), ECase(STYP_EXCEPT),
|
|
ECase(STYP_INFO), ECase(STYP_TDATA), ECase(STYP_TBSS),
|
|
ECase(STYP_LOADER), ECase(STYP_DEBUG), ECase(STYP_TYPCHK),
|
|
ECase(STYP_OVRFLO)
|
|
#undef ECase
|
|
};
|
|
|
|
template <typename T>
|
|
void XCOFFDumper::printOverflowSectionHeader(T &Sec) const {
|
|
if (Obj.is64Bit()) {
|
|
reportWarning(make_error<StringError>("An 64-bit XCOFF object file may not "
|
|
"contain an overflow section header.",
|
|
object_error::parse_failed),
|
|
Obj.getFileName());
|
|
}
|
|
|
|
W.printString("Name", Sec.getName());
|
|
W.printNumber("NumberOfRelocations", Sec.PhysicalAddress);
|
|
W.printNumber("NumberOfLineNumbers", Sec.VirtualAddress);
|
|
W.printHex("Size", Sec.SectionSize);
|
|
W.printHex("RawDataOffset", Sec.FileOffsetToRawData);
|
|
W.printHex("RelocationPointer", Sec.FileOffsetToRelocationInfo);
|
|
W.printHex("LineNumberPointer", Sec.FileOffsetToLineNumberInfo);
|
|
W.printNumber("IndexOfSectionOverflowed", Sec.NumberOfRelocations);
|
|
W.printNumber("IndexOfSectionOverflowed", Sec.NumberOfLineNumbers);
|
|
}
|
|
|
|
template <typename T>
|
|
void XCOFFDumper::printGenericSectionHeader(T &Sec) const {
|
|
W.printString("Name", Sec.getName());
|
|
W.printHex("PhysicalAddress", Sec.PhysicalAddress);
|
|
W.printHex("VirtualAddress", Sec.VirtualAddress);
|
|
W.printHex("Size", Sec.SectionSize);
|
|
W.printHex("RawDataOffset", Sec.FileOffsetToRawData);
|
|
W.printHex("RelocationPointer", Sec.FileOffsetToRelocationInfo);
|
|
W.printHex("LineNumberPointer", Sec.FileOffsetToLineNumberInfo);
|
|
W.printNumber("NumberOfRelocations", Sec.NumberOfRelocations);
|
|
W.printNumber("NumberOfLineNumbers", Sec.NumberOfLineNumbers);
|
|
}
|
|
|
|
template <typename T>
|
|
void XCOFFDumper::printSectionHeaders(ArrayRef<T> Sections) {
|
|
ListScope Group(W, "Sections");
|
|
|
|
uint16_t Index = 1;
|
|
for (const T &Sec : Sections) {
|
|
DictScope SecDS(W, "Section");
|
|
|
|
W.printNumber("Index", Index++);
|
|
uint16_t SectionType = Sec.getSectionType();
|
|
switch (SectionType) {
|
|
case XCOFF::STYP_OVRFLO:
|
|
printOverflowSectionHeader(Sec);
|
|
break;
|
|
case XCOFF::STYP_LOADER:
|
|
case XCOFF::STYP_EXCEPT:
|
|
case XCOFF::STYP_TYPCHK:
|
|
// TODO The interpretation of loader, exception and type check section
|
|
// headers are different from that of generic section headers. We will
|
|
// implement them later. We interpret them as generic section headers for
|
|
// now.
|
|
default:
|
|
printGenericSectionHeader(Sec);
|
|
break;
|
|
}
|
|
if (Sec.isReservedSectionType())
|
|
W.printHex("Flags", "Reserved", SectionType);
|
|
else
|
|
W.printEnum("Type", SectionType, makeArrayRef(SectionTypeFlagsNames));
|
|
}
|
|
|
|
if (opts::SectionRelocations)
|
|
report_fatal_error("Dumping section relocations is unimplemented");
|
|
|
|
if (opts::SectionSymbols)
|
|
report_fatal_error("Dumping symbols is unimplemented");
|
|
|
|
if (opts::SectionData)
|
|
report_fatal_error("Dumping section data is unimplemented");
|
|
}
|
|
|
|
namespace llvm {
|
|
std::unique_ptr<ObjDumper>
|
|
createXCOFFDumper(const object::XCOFFObjectFile &XObj, ScopedPrinter &Writer) {
|
|
return std::make_unique<XCOFFDumper>(XObj, Writer);
|
|
}
|
|
} // namespace llvm
|