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This will help us study the format of individual symbol records more closely. Differential Revision: http://reviews.llvm.org/D7664 Reviewed by: Timur Iskhodzhanov git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@229730 91177308-0d34-0410-b5e6-96231b3b80d8
371 lines
11 KiB
C++
371 lines
11 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 "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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#include "llvm/Object/ELFObjectFile.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/TargetSelect.h"
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#include <string>
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#include <system_error>
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using namespace llvm;
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using namespace llvm::object;
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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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// -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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// -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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// -codeview
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cl::opt<bool> CodeView("codeview",
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cl::desc("Display CodeView debug information"));
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// -codeview-subsection-bytes
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cl::opt<bool> CodeViewSubsectionBytes(
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"codeview-subsection-bytes",
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cl::desc("Dump raw contents of codeview debug sections and records"));
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// -arm-attributes, -a
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cl::opt<bool> ARMAttributes("arm-attributes",
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cl::desc("Display the ARM attributes section"));
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cl::alias ARMAttributesShort("-a", cl::desc("Alias for --arm-attributes"),
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cl::aliasopt(ARMAttributes));
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// -mips-plt-got
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cl::opt<bool>
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MipsPLTGOT("mips-plt-got",
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cl::desc("Display the MIPS GOT and PLT GOT sections"));
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// -coff-imports
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cl::opt<bool>
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COFFImports("coff-imports", cl::desc("Display the PE/COFF import table"));
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// -coff-exports
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cl::opt<bool>
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COFFExports("coff-exports", cl::desc("Display the PE/COFF export table"));
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// -coff-directives
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cl::opt<bool>
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COFFDirectives("coff-directives",
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cl::desc("Display the PE/COFF .drectve section"));
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// -coff-basereloc
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cl::opt<bool>
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COFFBaseRelocs("coff-basereloc",
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cl::desc("Display the PE/COFF .reloc section"));
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} // namespace opts
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static int ReturnValue = EXIT_SUCCESS;
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namespace llvm {
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bool error(std::error_code EC) {
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if (!EC)
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return false;
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ReturnValue = EXIT_FAILURE;
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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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}
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bool relocAddressLess(RelocationRef a, RelocationRef b) {
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uint64_t a_addr, b_addr;
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if (error(a.getOffset(a_addr))) exit(ReturnValue);
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if (error(b.getOffset(b_addr))) exit(ReturnValue);
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return a_addr < b_addr;
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}
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} // namespace llvm
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static void reportError(StringRef Input, std::error_code EC) {
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if (Input == "-")
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Input = "<stdin>";
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errs() << Input << ": " << EC.message() << "\n";
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errs().flush();
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ReturnValue = EXIT_FAILURE;
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}
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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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errs() << Input << ": " << Message << "\n";
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ReturnValue = EXIT_FAILURE;
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}
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static bool isMipsArch(unsigned Arch) {
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switch (Arch) {
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case llvm::Triple::mips:
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case llvm::Triple::mipsel:
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case llvm::Triple::mips64:
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case llvm::Triple::mips64el:
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return true;
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default:
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return false;
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}
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}
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/// @brief Creates an format-specific object file dumper.
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static std::error_code createDumper(const ObjectFile *Obj, StreamWriter &Writer,
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std::unique_ptr<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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}
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static StringRef getLoadName(const ObjectFile *Obj) {
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if (auto *ELF = dyn_cast<ELF32LEObjectFile>(Obj))
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return ELF->getLoadName();
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if (auto *ELF = dyn_cast<ELF64LEObjectFile>(Obj))
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return ELF->getLoadName();
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if (auto *ELF = dyn_cast<ELF32BEObjectFile>(Obj))
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return ELF->getLoadName();
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if (auto *ELF = dyn_cast<ELF64BEObjectFile>(Obj))
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return ELF->getLoadName();
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llvm_unreachable("Not ELF");
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}
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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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std::unique_ptr<ObjDumper> Dumper;
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if (std::error_code EC = createDumper(Obj, Writer, Dumper)) {
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reportError(Obj->getFileName(), EC);
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return;
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}
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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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<< "\n";
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outs() << "AddressSize: " << (8*Obj->getBytesInAddress()) << "bit\n";
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if (Obj->isELF())
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outs() << "LoadName: " << getLoadName(Obj) << "\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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if (opts::ProgramHeaders)
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Dumper->printProgramHeaders();
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if (Obj->getArch() == llvm::Triple::arm && Obj->isELF())
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if (opts::ARMAttributes)
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Dumper->printAttributes();
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if (isMipsArch(Obj->getArch()) && Obj->isELF())
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if (opts::MipsPLTGOT)
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Dumper->printMipsPLTGOT();
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if (opts::COFFImports)
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Dumper->printCOFFImports();
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if (opts::COFFExports)
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Dumper->printCOFFExports();
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if (opts::COFFDirectives)
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Dumper->printCOFFDirectives();
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if (opts::COFFBaseRelocs)
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Dumper->printCOFFBaseReloc();
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}
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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->child_begin(),
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ArcE = Arc->child_end();
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ArcI != ArcE; ++ArcI) {
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ErrorOr<std::unique_ptr<Binary>> ChildOrErr = ArcI->getAsBinary();
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if (std::error_code EC = ChildOrErr.getError()) {
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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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if (ObjectFile *Obj = dyn_cast<ObjectFile>(&*ChildOrErr.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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}
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}
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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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}
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// Attempt to open the binary.
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ErrorOr<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
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if (std::error_code EC = BinaryOrErr.getError()) {
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reportError(File, EC);
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return;
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}
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Binary &Binary = *BinaryOrErr.get().getBinary();
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if (Archive *Arc = dyn_cast<Archive>(&Binary))
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dumpArchive(Arc);
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else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
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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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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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// Initialize targets.
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llvm::InitializeAllTargetInfos();
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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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// 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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return ReturnValue;
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}
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