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282 lines
8.8 KiB
C++
282 lines
8.8 KiB
C++
//===- llvm-readobj.cpp - Dump contents of an Object File -----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This is a tool similar to readelf, except it works on multiple object file
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// formats. The main purpose of this tool is to provide detailed output suitable
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// for FileCheck.
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//
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// Flags should be similar to readelf where supported, but the output format
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// does not need to be identical. The point is to not make users learn yet
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// another set of flags.
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//
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// Output should be specialized for each format where appropriate.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm-readobj.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Analysis/Verifier.h"
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#include "llvm/Object/ELF.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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using namespace llvm;
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using namespace llvm::object;
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static cl::opt<std::string>
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InputFilename(cl::Positional, cl::desc("<input object>"), cl::init(""));
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static void dumpSymbolHeader() {
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outs() << format(" %-32s", (const char*)"Name")
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<< format(" %-4s", (const char*)"Type")
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<< format(" %-16s", (const char*)"Address")
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<< format(" %-16s", (const char*)"Size")
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<< format(" %-16s", (const char*)"FileOffset")
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<< format(" %-26s", (const char*)"Flags")
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<< "\n";
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}
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static void dumpSectionHeader() {
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outs() << format(" %-24s", (const char*)"Name")
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<< format(" %-16s", (const char*)"Address")
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<< format(" %-16s", (const char*)"Size")
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<< format(" %-8s", (const char*)"Align")
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<< format(" %-26s", (const char*)"Flags")
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<< "\n";
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}
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static const char *getTypeStr(SymbolRef::Type Type) {
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switch (Type) {
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case SymbolRef::ST_Unknown: return "?";
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case SymbolRef::ST_Data: return "DATA";
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case SymbolRef::ST_Debug: return "DBG";
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case SymbolRef::ST_File: return "FILE";
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case SymbolRef::ST_Function: return "FUNC";
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case SymbolRef::ST_Other: return "-";
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}
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return "INV";
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}
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static std::string getSymbolFlagStr(uint32_t Flags) {
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std::string result;
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if (Flags & SymbolRef::SF_Undefined)
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result += "undef,";
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if (Flags & SymbolRef::SF_Global)
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result += "global,";
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if (Flags & SymbolRef::SF_Weak)
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result += "weak,";
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if (Flags & SymbolRef::SF_Absolute)
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result += "absolute,";
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if (Flags & SymbolRef::SF_ThreadLocal)
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result += "threadlocal,";
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if (Flags & SymbolRef::SF_Common)
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result += "common,";
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if (Flags & SymbolRef::SF_FormatSpecific)
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result += "formatspecific,";
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// Remove trailing comma
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if (result.size() > 0) {
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result.erase(result.size() - 1);
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}
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return result;
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}
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static void checkError(error_code ec, const char *msg) {
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if (ec)
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report_fatal_error(std::string(msg) + ": " + ec.message());
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}
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static std::string getSectionFlagStr(const SectionRef &Section) {
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const struct {
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error_code (SectionRef::*MemF)(bool &) const;
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const char *FlagStr, *ErrorStr;
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} Work[] =
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{{ &SectionRef::isText, "text,", "Section.isText() failed" },
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{ &SectionRef::isData, "data,", "Section.isData() failed" },
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{ &SectionRef::isBSS, "bss,", "Section.isBSS() failed" },
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{ &SectionRef::isRequiredForExecution, "required,",
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"Section.isRequiredForExecution() failed" },
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{ &SectionRef::isVirtual, "virtual,", "Section.isVirtual() failed" },
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{ &SectionRef::isZeroInit, "zeroinit,", "Section.isZeroInit() failed" },
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{ &SectionRef::isReadOnlyData, "rodata,",
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"Section.isReadOnlyData() failed" }};
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std::string result;
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for (uint32_t I = 0; I < sizeof(Work)/sizeof(*Work); ++I) {
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bool B;
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checkError((Section.*Work[I].MemF)(B), Work[I].ErrorStr);
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if (B)
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result += Work[I].FlagStr;
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}
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// Remove trailing comma
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if (result.size() > 0) {
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result.erase(result.size() - 1);
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}
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return result;
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}
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static void
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dumpSymbol(const SymbolRef &Sym, const ObjectFile *obj, bool IsDynamic) {
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StringRef Name;
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SymbolRef::Type Type;
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uint32_t Flags;
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uint64_t Address;
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uint64_t Size;
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uint64_t FileOffset;
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checkError(Sym.getName(Name), "SymbolRef.getName() failed");
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checkError(Sym.getAddress(Address), "SymbolRef.getAddress() failed");
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checkError(Sym.getSize(Size), "SymbolRef.getSize() failed");
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checkError(Sym.getFileOffset(FileOffset),
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"SymbolRef.getFileOffset() failed");
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checkError(Sym.getType(Type), "SymbolRef.getType() failed");
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checkError(Sym.getFlags(Flags), "SymbolRef.getFlags() failed");
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std::string FullName = Name;
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// If this is a dynamic symbol from an ELF object, append
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// the symbol's version to the name.
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if (IsDynamic && obj->isELF()) {
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StringRef Version;
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bool IsDefault;
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GetELFSymbolVersion(obj, Sym, Version, IsDefault);
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if (!Version.empty()) {
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FullName += (IsDefault ? "@@" : "@");
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FullName += Version;
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}
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}
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// format() can't handle StringRefs
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outs() << format(" %-32s", FullName.c_str())
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<< format(" %-4s", getTypeStr(Type))
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<< format(" %16" PRIx64, Address)
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<< format(" %16" PRIx64, Size)
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<< format(" %16" PRIx64, FileOffset)
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<< " " << getSymbolFlagStr(Flags)
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<< "\n";
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}
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static void dumpStaticSymbol(const SymbolRef &Sym, const ObjectFile *obj) {
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return dumpSymbol(Sym, obj, false);
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}
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static void dumpDynamicSymbol(const SymbolRef &Sym, const ObjectFile *obj) {
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return dumpSymbol(Sym, obj, true);
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}
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static void dumpSection(const SectionRef &Section, const ObjectFile *obj) {
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StringRef Name;
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checkError(Section.getName(Name), "SectionRef::getName() failed");
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uint64_t Addr, Size, Align;
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checkError(Section.getAddress(Addr), "SectionRef::getAddress() failed");
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checkError(Section.getSize(Size), "SectionRef::getSize() failed");
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checkError(Section.getAlignment(Align), "SectionRef::getAlignment() failed");
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outs() << format(" %-24s", std::string(Name).c_str())
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<< format(" %16" PRIx64, Addr)
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<< format(" %16" PRIx64, Size)
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<< format(" %8" PRIx64, Align)
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<< " " << getSectionFlagStr(Section)
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<< "\n";
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}
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static void dumpLibrary(const LibraryRef &lib, const ObjectFile *obj) {
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StringRef path;
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lib.getPath(path);
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outs() << " " << path << "\n";
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}
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template<typename Iterator, typename Func>
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static void dump(const ObjectFile *obj, Func f, Iterator begin, Iterator end,
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const char *errStr) {
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error_code ec;
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uint32_t count = 0;
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Iterator it = begin, ie = end;
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while (it != ie) {
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f(*it, obj);
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it.increment(ec);
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if (ec)
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report_fatal_error(errStr);
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++count;
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}
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outs() << " Total: " << count << "\n\n";
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}
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static void dumpHeaders(const ObjectFile *obj) {
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outs() << "File Format : " << obj->getFileFormatName() << "\n";
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outs() << "Arch : "
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<< Triple::getArchTypeName((llvm::Triple::ArchType)obj->getArch())
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<< "\n";
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outs() << "Address Size: " << (8*obj->getBytesInAddress()) << " bits\n";
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outs() << "Load Name : " << obj->getLoadName() << "\n";
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outs() << "\n";
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}
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int main(int argc, char** argv) {
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error_code ec;
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sys::PrintStackTraceOnErrorSignal();
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PrettyStackTraceProgram X(argc, argv);
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cl::ParseCommandLineOptions(argc, argv,
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"LLVM Object Reader\n");
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if (InputFilename.empty()) {
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errs() << "Please specify an input filename\n";
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return 1;
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}
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// Open the object file
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OwningPtr<MemoryBuffer> File;
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if (MemoryBuffer::getFile(InputFilename, File)) {
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errs() << InputFilename << ": Open failed\n";
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return 1;
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}
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OwningPtr<ObjectFile> o(ObjectFile::createObjectFile(File.take()));
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ObjectFile *obj = o.get();
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if (!obj) {
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errs() << InputFilename << ": Object type not recognized\n";
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}
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dumpHeaders(obj);
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outs() << "Symbols:\n";
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dumpSymbolHeader();
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dump(obj, dumpStaticSymbol, obj->begin_symbols(), obj->end_symbols(),
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"Symbol iteration failed");
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outs() << "Dynamic Symbols:\n";
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dumpSymbolHeader();
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dump(obj, dumpDynamicSymbol, obj->begin_dynamic_symbols(),
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obj->end_dynamic_symbols(), "Symbol iteration failed");
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outs() << "Sections:\n";
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dumpSectionHeader();
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dump(obj, &dumpSection, obj->begin_sections(), obj->end_sections(),
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"Section iteration failed");
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if (obj->isELF()) {
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if (ErrorOr<void> e = dumpELFDynamicTable(obj, outs()))
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;
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else
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errs() << "InputFilename" << ": " << error_code(e).message() << "\n";
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}
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outs() << "Libraries needed:\n";
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dump(obj, &dumpLibrary, obj->begin_libraries_needed(),
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obj->end_libraries_needed(), "Needed libraries iteration failed");
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return 0;
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}
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