llvm/tools/llvm-readobj/llvm-readobj.cpp
Saleem Abdulrasool 459c949777 tools: add support for decoding ARM attributes
Enhance the ARM specific parsing support in llvm-readobj to support attributes.
This allows for simpler tests to validate encoding of the build attributes as
specified in the ARM ELF specification.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200450 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-30 04:46:33 +00:00

310 lines
9.2 KiB
C++

//===- llvm-readobj.cpp - Dump contents of an Object File -----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is a tool similar to readelf, except it works on multiple object file
// formats. The main purpose of this tool is to provide detailed output suitable
// for FileCheck.
//
// Flags should be similar to readelf where supported, but the output format
// does not need to be identical. The point is to not make users learn yet
// another set of flags.
//
// Output should be specialized for each format where appropriate.
//
//===----------------------------------------------------------------------===//
#include "llvm-readobj.h"
#include "Error.h"
#include "ObjDumper.h"
#include "StreamWriter.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/system_error.h"
#include <string>
using namespace llvm;
using namespace llvm::object;
namespace opts {
cl::list<std::string> InputFilenames(cl::Positional,
cl::desc("<input object files>"),
cl::ZeroOrMore);
// -file-headers, -h
cl::opt<bool> FileHeaders("file-headers",
cl::desc("Display file headers "));
cl::alias FileHeadersShort("h",
cl::desc("Alias for --file-headers"),
cl::aliasopt(FileHeaders));
// -sections, -s
cl::opt<bool> Sections("sections",
cl::desc("Display all sections."));
cl::alias SectionsShort("s",
cl::desc("Alias for --sections"),
cl::aliasopt(Sections));
// -section-relocations, -sr
cl::opt<bool> SectionRelocations("section-relocations",
cl::desc("Display relocations for each section shown."));
cl::alias SectionRelocationsShort("sr",
cl::desc("Alias for --section-relocations"),
cl::aliasopt(SectionRelocations));
// -section-symbols, -st
cl::opt<bool> SectionSymbols("section-symbols",
cl::desc("Display symbols for each section shown."));
cl::alias SectionSymbolsShort("st",
cl::desc("Alias for --section-symbols"),
cl::aliasopt(SectionSymbols));
// -section-data, -sd
cl::opt<bool> SectionData("section-data",
cl::desc("Display section data for each section shown."));
cl::alias SectionDataShort("sd",
cl::desc("Alias for --section-data"),
cl::aliasopt(SectionData));
// -relocations, -r
cl::opt<bool> Relocations("relocations",
cl::desc("Display the relocation entries in the file"));
cl::alias RelocationsShort("r",
cl::desc("Alias for --relocations"),
cl::aliasopt(Relocations));
// -symbols, -t
cl::opt<bool> Symbols("symbols",
cl::desc("Display the symbol table"));
cl::alias SymbolsShort("t",
cl::desc("Alias for --symbols"),
cl::aliasopt(Symbols));
// -dyn-symbols, -dt
cl::opt<bool> DynamicSymbols("dyn-symbols",
cl::desc("Display the dynamic symbol table"));
cl::alias DynamicSymbolsShort("dt",
cl::desc("Alias for --dyn-symbols"),
cl::aliasopt(DynamicSymbols));
// -unwind, -u
cl::opt<bool> UnwindInfo("unwind",
cl::desc("Display unwind information"));
cl::alias UnwindInfoShort("u",
cl::desc("Alias for --unwind"),
cl::aliasopt(UnwindInfo));
// -dynamic-table
cl::opt<bool> DynamicTable("dynamic-table",
cl::desc("Display the ELF .dynamic section table"));
// -needed-libs
cl::opt<bool> NeededLibraries("needed-libs",
cl::desc("Display the needed libraries"));
// -program-headers
cl::opt<bool> ProgramHeaders("program-headers",
cl::desc("Display ELF program headers"));
// -expand-relocs
cl::opt<bool> ExpandRelocs("expand-relocs",
cl::desc("Expand each shown relocation to multiple lines"));
// -codeview-linetables
cl::opt<bool> CodeViewLineTables("codeview-linetables",
cl::desc("Display CodeView line table information"));
// -arm-attributes, -a
cl::opt<bool> ARMAttributes("arm-attributes",
cl::desc("Display the ARM attributes section"));
cl::alias ARMAttributesShort("-a", cl::desc("Alias for --arm-attributes"),
cl::aliasopt(ARMAttributes));
} // namespace opts
static int ReturnValue = EXIT_SUCCESS;
namespace llvm {
bool error(error_code EC) {
if (!EC)
return false;
ReturnValue = EXIT_FAILURE;
outs() << "\nError reading file: " << EC.message() << ".\n";
outs().flush();
return true;
}
bool relocAddressLess(RelocationRef a, RelocationRef b) {
uint64_t a_addr, b_addr;
if (error(a.getOffset(a_addr))) return false;
if (error(b.getOffset(b_addr))) return false;
return a_addr < b_addr;
}
} // namespace llvm
static void reportError(StringRef Input, error_code EC) {
if (Input == "-")
Input = "<stdin>";
errs() << Input << ": " << EC.message() << "\n";
errs().flush();
ReturnValue = EXIT_FAILURE;
}
static void reportError(StringRef Input, StringRef Message) {
if (Input == "-")
Input = "<stdin>";
errs() << Input << ": " << Message << "\n";
ReturnValue = EXIT_FAILURE;
}
/// @brief Creates an format-specific object file dumper.
static error_code createDumper(const ObjectFile *Obj,
StreamWriter &Writer,
OwningPtr<ObjDumper> &Result) {
if (!Obj)
return readobj_error::unsupported_file_format;
if (Obj->isCOFF())
return createCOFFDumper(Obj, Writer, Result);
if (Obj->isELF())
return createELFDumper(Obj, Writer, Result);
if (Obj->isMachO())
return createMachODumper(Obj, Writer, Result);
return readobj_error::unsupported_obj_file_format;
}
/// @brief Dumps the specified object file.
static void dumpObject(const ObjectFile *Obj) {
StreamWriter Writer(outs());
OwningPtr<ObjDumper> Dumper;
if (error_code EC = createDumper(Obj, Writer, Dumper)) {
reportError(Obj->getFileName(), EC);
return;
}
outs() << '\n';
outs() << "File: " << Obj->getFileName() << "\n";
outs() << "Format: " << Obj->getFileFormatName() << "\n";
outs() << "Arch: "
<< Triple::getArchTypeName((llvm::Triple::ArchType)Obj->getArch())
<< "\n";
outs() << "AddressSize: " << (8*Obj->getBytesInAddress()) << "bit\n";
if (Obj->isELF())
outs() << "LoadName: " << Obj->getLoadName() << "\n";
if (opts::FileHeaders)
Dumper->printFileHeaders();
if (opts::Sections)
Dumper->printSections();
if (opts::Relocations)
Dumper->printRelocations();
if (opts::Symbols)
Dumper->printSymbols();
if (opts::DynamicSymbols)
Dumper->printDynamicSymbols();
if (opts::UnwindInfo)
Dumper->printUnwindInfo();
if (opts::DynamicTable)
Dumper->printDynamicTable();
if (opts::NeededLibraries)
Dumper->printNeededLibraries();
if (opts::ProgramHeaders)
Dumper->printProgramHeaders();
if (Obj->getArch() == llvm::Triple::arm && Obj->isELF())
if (opts::ARMAttributes)
Dumper->printAttributes();
}
/// @brief Dumps each object file in \a Arc;
static void dumpArchive(const Archive *Arc) {
for (Archive::child_iterator ArcI = Arc->child_begin(),
ArcE = Arc->child_end();
ArcI != ArcE; ++ArcI) {
OwningPtr<Binary> child;
if (error_code EC = ArcI->getAsBinary(child)) {
// Ignore non-object files.
if (EC != object_error::invalid_file_type)
reportError(Arc->getFileName(), EC.message());
continue;
}
if (ObjectFile *Obj = dyn_cast<ObjectFile>(child.get()))
dumpObject(Obj);
else
reportError(Arc->getFileName(), readobj_error::unrecognized_file_format);
}
}
/// @brief Opens \a File and dumps it.
static void dumpInput(StringRef File) {
// If file isn't stdin, check that it exists.
if (File != "-" && !sys::fs::exists(File)) {
reportError(File, readobj_error::file_not_found);
return;
}
// Attempt to open the binary.
ErrorOr<Binary *> BinaryOrErr = createBinary(File);
if (error_code EC = BinaryOrErr.getError()) {
reportError(File, EC);
return;
}
OwningPtr<Binary> Binary(BinaryOrErr.get());
if (Archive *Arc = dyn_cast<Archive>(Binary.get()))
dumpArchive(Arc);
else if (ObjectFile *Obj = dyn_cast<ObjectFile>(Binary.get()))
dumpObject(Obj);
else
reportError(File, readobj_error::unrecognized_file_format);
}
int main(int argc, const char *argv[]) {
sys::PrintStackTraceOnErrorSignal();
PrettyStackTraceProgram X(argc, argv);
llvm_shutdown_obj Y;
// Initialize targets.
llvm::InitializeAllTargetInfos();
// Register the target printer for --version.
cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
cl::ParseCommandLineOptions(argc, argv, "LLVM Object Reader\n");
// Default to stdin if no filename is specified.
if (opts::InputFilenames.size() == 0)
opts::InputFilenames.push_back("-");
std::for_each(opts::InputFilenames.begin(), opts::InputFilenames.end(),
dumpInput);
return ReturnValue;
}