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Diffstat (limited to 'contrib/llvm/tools/llvm-readobj/llvm-readobj.cpp')
| -rw-r--r-- | contrib/llvm/tools/llvm-readobj/llvm-readobj.cpp | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/contrib/llvm/tools/llvm-readobj/llvm-readobj.cpp b/contrib/llvm/tools/llvm-readobj/llvm-readobj.cpp new file mode 100644 index 0000000..2e95b6b --- /dev/null +++ b/contrib/llvm/tools/llvm-readobj/llvm-readobj.cpp @@ -0,0 +1,293 @@ +//===- 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")); +} // namespace opts + +namespace llvm { + +bool error(error_code EC) { + if (!EC) + return false; + + 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(); +} + +static void reportError(StringRef Input, StringRef Message) { + if (Input == "-") + Input = "<stdin>"; + + errs() << Input << ": " << Message << "\n"; +} + +/// @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(); +} + + +/// @brief Dumps each object file in \a Arc; +static void dumpArchive(const Archive *Arc) { + for (Archive::child_iterator ArcI = Arc->begin_children(), + ArcE = Arc->end_children(); + 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. + OwningPtr<Binary> Binary; + if (error_code EC = createBinary(File, Binary)) { + reportError(File, EC); + return; + } + + 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 0; +} |
