2012-03-03 00:43:51 +01:00
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//===- llvm-readobj.cpp - Dump contents of an Object File -----------------===//
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2012-03-01 02:36:50 +01:00
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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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2013-02-05 21:27:22 +01:00
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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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2012-03-03 00:43:51 +01:00
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//
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2013-02-05 21:27:22 +01:00
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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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2012-03-03 00:43:51 +01:00
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//
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2013-02-05 21:27:22 +01:00
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// Output should be specialized for each format where appropriate.
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2012-03-03 00:43:51 +01:00
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//
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//===----------------------------------------------------------------------===//
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2012-03-01 02:36:50 +01:00
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2013-02-20 03:37:12 +01:00
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#include "llvm-readobj.h"
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2013-04-03 20:31:38 +02:00
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#include "Error.h"
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#include "ObjDumper.h"
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#include "StreamWriter.h"
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#include "llvm/Object/Archive.h"
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2012-12-04 11:44:52 +01:00
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#include "llvm/Object/ObjectFile.h"
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2013-04-03 20:31:38 +02:00
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#include "llvm/Support/Casting.h"
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2012-03-01 02:36:50 +01:00
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#include "llvm/Support/CommandLine.h"
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2013-04-03 20:31:38 +02:00
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#include "llvm/Support/DataTypes.h"
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2012-03-01 02:36:50 +01:00
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#include "llvm/Support/Debug.h"
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2013-04-03 20:31:38 +02:00
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/ManagedStatic.h"
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2012-12-04 11:44:52 +01:00
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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2013-04-03 20:31:38 +02:00
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/system_error.h"
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#include <string>
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2012-03-01 02:36:50 +01:00
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using namespace llvm;
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using namespace llvm::object;
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2013-04-03 20:31:38 +02:00
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namespace opts {
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cl::list<std::string> InputFilenames(cl::Positional,
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cl::desc("<input object files>"),
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cl::ZeroOrMore);
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// -file-headers, -h
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cl::opt<bool> FileHeaders("file-headers",
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cl::desc("Display file headers "));
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cl::alias FileHeadersShort("h",
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cl::desc("Alias for --file-headers"),
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cl::aliasopt(FileHeaders));
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// -sections, -s
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cl::opt<bool> Sections("sections",
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cl::desc("Display all sections."));
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cl::alias SectionsShort("s",
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cl::desc("Alias for --sections"),
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cl::aliasopt(Sections));
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// -section-relocations, -sr
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cl::opt<bool> SectionRelocations("section-relocations",
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cl::desc("Display relocations for each section shown."));
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cl::alias SectionRelocationsShort("sr",
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cl::desc("Alias for --section-relocations"),
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cl::aliasopt(SectionRelocations));
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// -section-symbols, -st
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cl::opt<bool> SectionSymbols("section-symbols",
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cl::desc("Display symbols for each section shown."));
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cl::alias SectionSymbolsShort("st",
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cl::desc("Alias for --section-symbols"),
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cl::aliasopt(SectionSymbols));
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// -section-data, -sd
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cl::opt<bool> SectionData("section-data",
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cl::desc("Display section data for each section shown."));
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cl::alias SectionDataShort("sd",
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cl::desc("Alias for --section-data"),
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cl::aliasopt(SectionData));
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// -relocations, -r
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cl::opt<bool> Relocations("relocations",
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cl::desc("Display the relocation entries in the file"));
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cl::alias RelocationsShort("r",
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cl::desc("Alias for --relocations"),
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cl::aliasopt(Relocations));
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// -symbols, -t
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cl::opt<bool> Symbols("symbols",
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cl::desc("Display the symbol table"));
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cl::alias SymbolsShort("t",
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cl::desc("Alias for --symbols"),
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cl::aliasopt(Symbols));
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// -dyn-symbols, -dt
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cl::opt<bool> DynamicSymbols("dyn-symbols",
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cl::desc("Display the dynamic symbol table"));
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cl::alias DynamicSymbolsShort("dt",
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cl::desc("Alias for --dyn-symbols"),
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cl::aliasopt(DynamicSymbols));
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// -unwind, -u
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cl::opt<bool> UnwindInfo("unwind",
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cl::desc("Display unwind information"));
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cl::alias UnwindInfoShort("u",
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cl::desc("Alias for --unwind"),
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cl::aliasopt(UnwindInfo));
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// -dynamic-table
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cl::opt<bool> DynamicTable("dynamic-table",
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cl::desc("Display the ELF .dynamic section table"));
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// -needed-libs
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cl::opt<bool> NeededLibraries("needed-libs",
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cl::desc("Display the needed libraries"));
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2013-04-12 06:01:52 +02:00
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2013-04-12 06:07:39 +02:00
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// -program-headers
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cl::opt<bool> ProgramHeaders("program-headers",
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cl::desc("Display ELF program headers"));
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2013-04-12 06:01:52 +02:00
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// -expand-relocs
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cl::opt<bool> ExpandRelocs("expand-relocs",
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cl::desc("Expand each shown relocation to multiple lines"));
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2013-04-03 20:31:38 +02:00
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} // namespace opts
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namespace llvm {
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bool error(error_code EC) {
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if (!EC)
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return false;
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outs() << "\nError reading file: " << EC.message() << ".\n";
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outs().flush();
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return true;
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2012-12-31 17:05:21 +01:00
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}
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2013-04-03 20:31:38 +02:00
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bool relocAddressLess(RelocationRef a, RelocationRef b) {
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uint64_t a_addr, b_addr;
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2013-04-25 14:28:45 +02:00
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if (error(a.getOffset(a_addr))) return false;
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if (error(b.getOffset(b_addr))) return false;
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2013-04-03 20:31:38 +02:00
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return a_addr < b_addr;
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2012-12-31 17:29:44 +01:00
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}
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2013-04-03 20:31:38 +02:00
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} // namespace llvm
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2012-03-01 02:36:50 +01:00
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2012-12-31 16:45:31 +01:00
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2013-04-03 20:31:38 +02:00
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static void reportError(StringRef Input, error_code EC) {
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if (Input == "-")
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Input = "<stdin>";
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2012-12-31 17:29:44 +01:00
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2013-04-03 20:31:38 +02:00
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errs() << Input << ": " << EC.message() << "\n";
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errs().flush();
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2012-12-31 17:29:44 +01:00
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}
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2013-04-03 20:31:38 +02:00
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static void reportError(StringRef Input, StringRef Message) {
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if (Input == "-")
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Input = "<stdin>";
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2012-03-01 02:36:50 +01:00
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2013-04-03 20:31:38 +02:00
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errs() << Input << ": " << Message << "\n";
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2012-03-01 02:36:50 +01:00
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}
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2013-04-03 20:31:38 +02:00
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/// @brief Creates an format-specific object file dumper.
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static error_code createDumper(const ObjectFile *Obj,
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StreamWriter &Writer,
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OwningPtr<ObjDumper> &Result) {
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if (!Obj)
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return readobj_error::unsupported_file_format;
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if (Obj->isCOFF())
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return createCOFFDumper(Obj, Writer, Result);
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if (Obj->isELF())
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return createELFDumper(Obj, Writer, Result);
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if (Obj->isMachO())
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return createMachODumper(Obj, Writer, Result);
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return readobj_error::unsupported_obj_file_format;
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2012-03-01 02:36:50 +01:00
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}
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2012-12-31 17:29:44 +01:00
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2013-04-03 20:31:38 +02:00
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/// @brief Dumps the specified object file.
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static void dumpObject(const ObjectFile *Obj) {
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StreamWriter Writer(outs());
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OwningPtr<ObjDumper> Dumper;
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if (error_code EC = createDumper(Obj, Writer, Dumper)) {
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reportError(Obj->getFileName(), EC);
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return;
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2012-12-31 17:29:44 +01:00
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}
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2013-04-03 20:31:38 +02:00
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outs() << '\n';
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outs() << "File: " << Obj->getFileName() << "\n";
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outs() << "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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2012-03-01 23:19:54 +01:00
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<< "\n";
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2013-04-03 20:31:38 +02:00
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outs() << "AddressSize: " << (8*Obj->getBytesInAddress()) << "bit\n";
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if (Obj->isELF())
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outs() << "LoadName: " << Obj->getLoadName() << "\n";
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if (opts::FileHeaders)
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Dumper->printFileHeaders();
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if (opts::Sections)
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Dumper->printSections();
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if (opts::Relocations)
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Dumper->printRelocations();
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if (opts::Symbols)
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Dumper->printSymbols();
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if (opts::DynamicSymbols)
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Dumper->printDynamicSymbols();
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if (opts::UnwindInfo)
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Dumper->printUnwindInfo();
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if (opts::DynamicTable)
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Dumper->printDynamicTable();
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if (opts::NeededLibraries)
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Dumper->printNeededLibraries();
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2013-04-12 06:07:39 +02:00
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if (opts::ProgramHeaders)
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Dumper->printProgramHeaders();
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2012-03-01 23:19:54 +01:00
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}
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2012-03-01 02:36:50 +01:00
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2013-04-03 20:31:38 +02:00
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/// @brief Dumps each object file in \a Arc;
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static void dumpArchive(const Archive *Arc) {
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for (Archive::child_iterator ArcI = Arc->begin_children(),
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ArcE = Arc->end_children();
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ArcI != ArcE; ++ArcI) {
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OwningPtr<Binary> child;
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if (error_code EC = ArcI->getAsBinary(child)) {
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// Ignore non-object files.
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if (EC != object_error::invalid_file_type)
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reportError(Arc->getFileName(), EC.message());
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continue;
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}
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2012-03-01 02:36:50 +01:00
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2013-04-03 20:31:38 +02:00
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if (ObjectFile *Obj = dyn_cast<ObjectFile>(child.get()))
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dumpObject(Obj);
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else
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reportError(Arc->getFileName(), readobj_error::unrecognized_file_format);
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2012-03-01 02:36:50 +01:00
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}
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2013-04-03 20:31:38 +02:00
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}
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2012-03-01 02:36:50 +01:00
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2013-04-03 20:31:38 +02:00
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/// @brief Opens \a File and dumps it.
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static void dumpInput(StringRef File) {
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// If file isn't stdin, check that it exists.
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if (File != "-" && !sys::fs::exists(File)) {
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reportError(File, readobj_error::file_not_found);
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return;
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2012-03-01 02:36:50 +01:00
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}
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2013-04-03 20:31:38 +02:00
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// Attempt to open the binary.
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OwningPtr<Binary> Binary;
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if (error_code EC = createBinary(File, Binary)) {
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reportError(File, EC);
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return;
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2012-03-01 02:36:50 +01:00
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}
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2013-04-03 20:31:38 +02:00
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if (Archive *Arc = dyn_cast<Archive>(Binary.get()))
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dumpArchive(Arc);
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else if (ObjectFile *Obj = dyn_cast<ObjectFile>(Binary.get()))
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dumpObject(Obj);
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else
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reportError(File, readobj_error::unrecognized_file_format);
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}
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2012-12-31 17:53:01 +01:00
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2013-04-03 20:31:38 +02:00
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int main(int argc, const char *argv[]) {
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sys::PrintStackTraceOnErrorSignal();
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PrettyStackTraceProgram X(argc, argv);
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llvm_shutdown_obj Y;
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2012-12-31 17:29:44 +01:00
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2013-04-03 20:31:38 +02:00
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// Initialize targets.
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llvm::InitializeAllTargetInfos();
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2012-12-31 17:29:44 +01:00
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2013-04-03 20:31:38 +02:00
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// Register the target printer for --version.
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cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
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cl::ParseCommandLineOptions(argc, argv, "LLVM Object Reader\n");
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2013-02-20 03:37:12 +01:00
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2013-04-03 20:31:38 +02:00
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// Default to stdin if no filename is specified.
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if (opts::InputFilenames.size() == 0)
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opts::InputFilenames.push_back("-");
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std::for_each(opts::InputFilenames.begin(), opts::InputFilenames.end(),
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dumpInput);
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2012-12-31 17:53:01 +01:00
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2012-03-01 02:36:50 +01:00
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return 0;
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}
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