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llvm/tools/llvm-readobj/llvm-readobj.cpp
James Henderson c2ed95b9be [llvm-readelf] Don't suppress static symbol table with --dyn-symbols + --symbols 
In r287786, a bug was introduced into llvm-readelf where it didn't print
the static symbol table if both --symbols and --dyn-symbols were
specified, even if there was no dynamic symbol table. This is obviously
incorrect.

This patch fixes this issue, by delegating the decision of which symbol
tables should be printed to the final dumper, rather than trying to
decide in the command-line option handling layer. The decision was made
to follow the approach taken in this patch because the LLVM style dumper
uses a different order to the original GNU style behaviour (and GNU
readelf) for ELF output. Other approaches resulted in behaviour changes
for other dumpers which felt wrong. In particular, I wanted to avoid
changing the order of the output for --symbols --dyn-symbols for LLVM
style, keep what is emitted by --symbols unchanged for all dumpers, and
avoid having different orders of .dynsym and .symtab dumping for GNU
"--symbols" and "--symbols --dyn-symbols".

Reviewed by: grimar, rupprecht

Differential Revision: https://reviews.llvm.org/D57016


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351960 91177308-0d34-0410-b5e6-96231b3b80d8
2019-01-23 16:15:39 +00:00

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//===- llvm-readobj.cpp - Dump contents of an Object File -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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 "WindowsResourceDumper.h"
#include "llvm/DebugInfo/CodeView/MergingTypeTableBuilder.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/COFFImportFile.h"
#include "llvm/Object/MachOUniversal.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/WindowsResource.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/FormatVariadic.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/ScopedPrinter.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
using namespace llvm::object;
namespace opts {
cl::list<std::string> InputFilenames(cl::Positional,
cl::desc("<input object files>"),
cl::ZeroOrMore);
// -all, -a
cl::opt<bool>
All("all",
cl::desc("Equivalent to setting: --file-headers, --program-headers, "
"--section-headers, --symbols, --relocations, "
"--dynamic-table, --notes, --version-info, --unwind, "
"--section-groups and --elf-hash-histogram."));
cl::alias AllShort("a", cl::desc("Alias for --all"), cl::aliasopt(All));
// --headers -e
cl::opt<bool>
Headers("headers",
cl::desc("Equivalent to setting: --file-headers, --program-headers, "
"--section-headers"));
cl::alias HeadersShort("e", cl::desc("Alias for --headers"),
cl::aliasopt(Headers));
// -wide, -W
cl::opt<bool>
WideOutput("wide", cl::desc("Ignored for compatibility with GNU readelf"),
cl::Hidden);
cl::alias WideOutputShort("W",
cl::desc("Alias for --wide"),
cl::aliasopt(WideOutput));
// -file-headers, -file-header, -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), cl::NotHidden);
cl::alias FileHeadersSingular("file-header",
cl::desc("Alias for --file-headers"),
cl::aliasopt(FileHeaders));
// -section-headers, -sections, -S
// Also -s in llvm-readobj mode.
cl::opt<bool> SectionHeaders("section-headers",
cl::desc("Display all section headers."));
cl::alias SectionsShortUpper("S", cl::desc("Alias for --section-headers"),
cl::aliasopt(SectionHeaders), cl::NotHidden);
cl::alias SectionHeadersAlias("sections",
cl::desc("Alias for --section-headers"),
cl::aliasopt(SectionHeaders), cl::NotHidden);
// -section-relocations
// Also -sr in llvm-readobj mode.
cl::opt<bool> SectionRelocations("section-relocations",
cl::desc("Display relocations for each section shown."));
// -section-symbols
// Also -st in llvm-readobj mode.
cl::opt<bool> SectionSymbols("section-symbols",
cl::desc("Display symbols for each section shown."));
// -section-data
// Also -sd in llvm-readobj mode.
cl::opt<bool> SectionData("section-data",
cl::desc("Display section data for each section shown."));
// -relocations, -relocs, -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), cl::NotHidden);
cl::alias RelocationsGNU("relocs", cl::desc("Alias for --relocations"),
cl::aliasopt(Relocations));
// -notes, -n
cl::opt<bool> Notes("notes", cl::desc("Display the ELF notes in the file"));
cl::alias NotesShort("n", cl::desc("Alias for --notes"), cl::aliasopt(Notes));
// -dyn-relocations
cl::opt<bool> DynRelocs("dyn-relocations",
cl::desc("Display the dynamic relocation entries in the file"));
// -symbols
// Also -s in llvm-readelf mode, or -t in llvm-readobj mode.
cl::opt<bool>
Symbols("symbols",
cl::desc("Display the symbol table. Also display the dynamic "
"symbol table when using GNU output style for ELF"));
cl::alias SymbolsGNU("syms", cl::desc("Alias for --symbols"),
cl::aliasopt(Symbols));
// -dyn-symbols, -dyn-syms
// Also -dt in llvm-readobj mode.
cl::opt<bool> DynamicSymbols("dyn-symbols",
cl::desc("Display the dynamic symbol table"));
cl::alias DynSymsGNU("dyn-syms", cl::desc("Alias for --dyn-symbols"),
cl::aliasopt(DynamicSymbols));
// -hash-symbols
cl::opt<bool> HashSymbols(
"hash-symbols",
cl::desc("Display the dynamic symbols derived from the hash section"));
// -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, -dynamic, -d
cl::opt<bool> DynamicTable("dynamic-table",
cl::desc("Display the ELF .dynamic section table"));
cl::alias DynamicTableShort("d", cl::desc("Alias for --dynamic-table"),
cl::aliasopt(DynamicTable), cl::NotHidden);
cl::alias DynamicTableAlias("dynamic", cl::desc("Alias for --dynamic-table"),
cl::aliasopt(DynamicTable));
// -needed-libs
cl::opt<bool> NeededLibraries("needed-libs",
cl::desc("Display the needed libraries"));
// -program-headers, -segments, -l
cl::opt<bool> ProgramHeaders("program-headers",
cl::desc("Display ELF program headers"));
cl::alias ProgramHeadersShort("l", cl::desc("Alias for --program-headers"),
cl::aliasopt(ProgramHeaders), cl::NotHidden);
cl::alias SegmentsAlias("segments", cl::desc("Alias for --program-headers"),
cl::aliasopt(ProgramHeaders));
// -string-dump, -p
cl::list<std::string> StringDump("string-dump", cl::desc("<number|name>"),
cl::ZeroOrMore);
cl::alias StringDumpShort("p", cl::desc("Alias for --string-dump"),
cl::aliasopt(StringDump));
// -hex-dump, -x
cl::list<std::string> HexDump("hex-dump", cl::desc("<number|name>"),
cl::ZeroOrMore);
cl::alias HexDumpShort("x", cl::desc("Alias for --hex-dump"),
cl::aliasopt(HexDump));
// -demangle, -C
cl::opt<bool> Demangle("demangle",
cl::desc("Demangle symbol names in output"));
cl::alias DemangleShort("C", cl::desc("Alias for --demangle"),
cl::aliasopt(Demangle), cl::NotHidden);
// -hash-table
cl::opt<bool> HashTable("hash-table",
cl::desc("Display ELF hash table"));
// -gnu-hash-table
cl::opt<bool> GnuHashTable("gnu-hash-table",
cl::desc("Display ELF .gnu.hash section"));
// -expand-relocs
cl::opt<bool> ExpandRelocs("expand-relocs",
cl::desc("Expand each shown relocation to multiple lines"));
// -raw-relr
cl::opt<bool> RawRelr("raw-relr",
cl::desc("Do not decode relocations in SHT_RELR section, display raw contents"));
// -codeview
cl::opt<bool> CodeView("codeview",
cl::desc("Display CodeView debug information"));
// -codeview-merged-types
cl::opt<bool>
CodeViewMergedTypes("codeview-merged-types",
cl::desc("Display the merged CodeView type stream"));
// -codeview-subsection-bytes
cl::opt<bool> CodeViewSubsectionBytes(
"codeview-subsection-bytes",
cl::desc("Dump raw contents of codeview debug sections and records"));
// -arm-attributes
cl::opt<bool> ARMAttributes("arm-attributes",
cl::desc("Display the ARM attributes section"));
// -mips-plt-got
cl::opt<bool>
MipsPLTGOT("mips-plt-got",
cl::desc("Display the MIPS GOT and PLT GOT sections"));
// -mips-abi-flags
cl::opt<bool> MipsABIFlags("mips-abi-flags",
cl::desc("Display the MIPS.abiflags section"));
// -mips-reginfo
cl::opt<bool> MipsReginfo("mips-reginfo",
cl::desc("Display the MIPS .reginfo section"));
// -mips-options
cl::opt<bool> MipsOptions("mips-options",
cl::desc("Display the MIPS .MIPS.options section"));
// -coff-imports
cl::opt<bool>
COFFImports("coff-imports", cl::desc("Display the PE/COFF import table"));
// -coff-exports
cl::opt<bool>
COFFExports("coff-exports", cl::desc("Display the PE/COFF export table"));
// -coff-directives
cl::opt<bool>
COFFDirectives("coff-directives",
cl::desc("Display the PE/COFF .drectve section"));
// -coff-basereloc
cl::opt<bool>
COFFBaseRelocs("coff-basereloc",
cl::desc("Display the PE/COFF .reloc section"));
// -coff-debug-directory
cl::opt<bool>
COFFDebugDirectory("coff-debug-directory",
cl::desc("Display the PE/COFF debug directory"));
// -coff-resources
cl::opt<bool> COFFResources("coff-resources",
cl::desc("Display the PE/COFF .rsrc section"));
// -coff-load-config
cl::opt<bool>
COFFLoadConfig("coff-load-config",
cl::desc("Display the PE/COFF load config"));
// -elf-linker-options
cl::opt<bool>
ELFLinkerOptions("elf-linker-options",
cl::desc("Display the ELF .linker-options section"));
// -macho-data-in-code
cl::opt<bool>
MachODataInCode("macho-data-in-code",
cl::desc("Display MachO Data in Code command"));
// -macho-indirect-symbols
cl::opt<bool>
MachOIndirectSymbols("macho-indirect-symbols",
cl::desc("Display MachO indirect symbols"));
// -macho-linker-options
cl::opt<bool>
MachOLinkerOptions("macho-linker-options",
cl::desc("Display MachO linker options"));
// -macho-segment
cl::opt<bool>
MachOSegment("macho-segment",
cl::desc("Display MachO Segment command"));
// -macho-version-min
cl::opt<bool>
MachOVersionMin("macho-version-min",
cl::desc("Display MachO version min command"));
// -macho-dysymtab
cl::opt<bool>
MachODysymtab("macho-dysymtab",
cl::desc("Display MachO Dysymtab command"));
// -stackmap
cl::opt<bool>
PrintStackMap("stackmap",
cl::desc("Display contents of stackmap section"));
// -version-info, -V
cl::opt<bool>
VersionInfo("version-info",
cl::desc("Display ELF version sections (if present)"));
cl::alias VersionInfoShort("V", cl::desc("Alias for -version-info"),
cl::aliasopt(VersionInfo));
// -elf-section-groups, -section-groups, -g
cl::opt<bool> SectionGroups("elf-section-groups",
cl::desc("Display ELF section group contents"));
cl::alias SectionGroupsAlias("section-groups",
cl::desc("Alias for -elf-sections-groups"),
cl::aliasopt(SectionGroups));
cl::alias SectionGroupsShort("g", cl::desc("Alias for -elf-sections-groups"),
cl::aliasopt(SectionGroups));
// -elf-hash-histogram, -histogram, -I
cl::opt<bool> HashHistogram(
"elf-hash-histogram",
cl::desc("Display bucket list histogram for hash sections"));
cl::alias HashHistogramShort("I", cl::desc("Alias for -elf-hash-histogram"),
cl::aliasopt(HashHistogram));
cl::alias HistogramAlias("histogram",
cl::desc("Alias for --elf-hash-histogram"),
cl::aliasopt(HashHistogram));
// -elf-cg-profile
cl::opt<bool> CGProfile("elf-cg-profile", cl::desc("Display callgraph profile section"));
// -addrsig
cl::opt<bool> Addrsig("addrsig",
cl::desc("Display address-significance table"));
// -elf-output-style
cl::opt<OutputStyleTy>
Output("elf-output-style", cl::desc("Specify ELF dump style"),
cl::values(clEnumVal(LLVM, "LLVM default style"),
clEnumVal(GNU, "GNU readelf style")),
cl::init(LLVM));
} // namespace opts
namespace llvm {
LLVM_ATTRIBUTE_NORETURN void reportError(Twine Msg) {
errs() << "\nError reading file: " << Msg << ".\n";
errs().flush();
exit(1);
}
void error(Error EC) {
if (!EC)
return;
handleAllErrors(std::move(EC),
[&](const ErrorInfoBase &EI) { reportError(EI.message()); });
}
void error(std::error_code EC) {
if (!EC)
return;
reportError(EC.message());
}
bool relocAddressLess(RelocationRef a, RelocationRef b) {
return a.getOffset() < b.getOffset();
}
} // namespace llvm
static void reportError(StringRef Input, std::error_code EC) {
if (Input == "-")
Input = "<stdin>";
reportError(Twine(Input) + ": " + EC.message());
}
static void reportError(StringRef Input, Error Err) {
if (Input == "-")
Input = "<stdin>";
std::string ErrMsg;
{
raw_string_ostream ErrStream(ErrMsg);
logAllUnhandledErrors(std::move(Err), ErrStream, Input + ": ");
}
reportError(ErrMsg);
}
static bool isMipsArch(unsigned Arch) {
switch (Arch) {
case llvm::Triple::mips:
case llvm::Triple::mipsel:
case llvm::Triple::mips64:
case llvm::Triple::mips64el:
return true;
default:
return false;
}
}
namespace {
struct ReadObjTypeTableBuilder {
ReadObjTypeTableBuilder()
: Allocator(), IDTable(Allocator), TypeTable(Allocator) {}
llvm::BumpPtrAllocator Allocator;
llvm::codeview::MergingTypeTableBuilder IDTable;
llvm::codeview::MergingTypeTableBuilder TypeTable;
};
}
static ReadObjTypeTableBuilder CVTypes;
/// Creates an format-specific object file dumper.
static std::error_code createDumper(const ObjectFile *Obj,
ScopedPrinter &Writer,
std::unique_ptr<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);
if (Obj->isWasm())
return createWasmDumper(Obj, Writer, Result);
return readobj_error::unsupported_obj_file_format;
}
/// Dumps the specified object file.
static void dumpObject(const ObjectFile *Obj, ScopedPrinter &Writer) {
std::unique_ptr<ObjDumper> Dumper;
if (std::error_code EC = createDumper(Obj, Writer, Dumper))
reportError(Obj->getFileName(), EC);
if (opts::Output == opts::LLVM) {
Writer.startLine() << "\n";
Writer.printString("File", Obj->getFileName());
Writer.printString("Format", Obj->getFileFormatName());
Writer.printString("Arch", Triple::getArchTypeName(
(llvm::Triple::ArchType)Obj->getArch()));
Writer.printString("AddressSize",
formatv("{0}bit", 8 * Obj->getBytesInAddress()));
Dumper->printLoadName();
}
if (opts::FileHeaders)
Dumper->printFileHeaders();
if (opts::SectionHeaders)
Dumper->printSectionHeaders();
if (opts::Relocations)
Dumper->printRelocations();
if (opts::DynRelocs)
Dumper->printDynamicRelocations();
if (opts::Symbols || opts::DynamicSymbols)
Dumper->printSymbols(opts::Symbols, opts::DynamicSymbols);
if (opts::HashSymbols)
Dumper->printHashSymbols();
if (opts::UnwindInfo)
Dumper->printUnwindInfo();
if (opts::DynamicTable)
Dumper->printDynamicTable();
if (opts::NeededLibraries)
Dumper->printNeededLibraries();
if (opts::ProgramHeaders)
Dumper->printProgramHeaders();
if (!opts::StringDump.empty())
llvm::for_each(opts::StringDump, [&Dumper, Obj](StringRef SectionName) {
Dumper->printSectionAsString(Obj, SectionName);
});
if (!opts::HexDump.empty())
llvm::for_each(opts::HexDump, [&Dumper, Obj](StringRef SectionName) {
Dumper->printSectionAsHex(Obj, SectionName);
});
if (opts::HashTable)
Dumper->printHashTable();
if (opts::GnuHashTable)
Dumper->printGnuHashTable();
if (opts::VersionInfo)
Dumper->printVersionInfo();
if (Obj->isELF()) {
if (opts::ELFLinkerOptions)
Dumper->printELFLinkerOptions();
if (Obj->getArch() == llvm::Triple::arm)
if (opts::ARMAttributes)
Dumper->printAttributes();
if (isMipsArch(Obj->getArch())) {
if (opts::MipsPLTGOT)
Dumper->printMipsPLTGOT();
if (opts::MipsABIFlags)
Dumper->printMipsABIFlags();
if (opts::MipsReginfo)
Dumper->printMipsReginfo();
if (opts::MipsOptions)
Dumper->printMipsOptions();
}
if (opts::SectionGroups)
Dumper->printGroupSections();
if (opts::HashHistogram)
Dumper->printHashHistogram();
if (opts::CGProfile)
Dumper->printCGProfile();
if (opts::Addrsig)
Dumper->printAddrsig();
if (opts::Notes)
Dumper->printNotes();
}
if (Obj->isCOFF()) {
if (opts::COFFImports)
Dumper->printCOFFImports();
if (opts::COFFExports)
Dumper->printCOFFExports();
if (opts::COFFDirectives)
Dumper->printCOFFDirectives();
if (opts::COFFBaseRelocs)
Dumper->printCOFFBaseReloc();
if (opts::COFFDebugDirectory)
Dumper->printCOFFDebugDirectory();
if (opts::COFFResources)
Dumper->printCOFFResources();
if (opts::COFFLoadConfig)
Dumper->printCOFFLoadConfig();
if (opts::Addrsig)
Dumper->printAddrsig();
if (opts::CodeView)
Dumper->printCodeViewDebugInfo();
if (opts::CodeViewMergedTypes)
Dumper->mergeCodeViewTypes(CVTypes.IDTable, CVTypes.TypeTable);
}
if (Obj->isMachO()) {
if (opts::MachODataInCode)
Dumper->printMachODataInCode();
if (opts::MachOIndirectSymbols)
Dumper->printMachOIndirectSymbols();
if (opts::MachOLinkerOptions)
Dumper->printMachOLinkerOptions();
if (opts::MachOSegment)
Dumper->printMachOSegment();
if (opts::MachOVersionMin)
Dumper->printMachOVersionMin();
if (opts::MachODysymtab)
Dumper->printMachODysymtab();
}
if (opts::PrintStackMap)
Dumper->printStackMap();
}
/// Dumps each object file in \a Arc;
static void dumpArchive(const Archive *Arc, ScopedPrinter &Writer) {
Error Err = Error::success();
for (auto &Child : Arc->children(Err)) {
Expected<std::unique_ptr<Binary>> ChildOrErr = Child.getAsBinary();
if (!ChildOrErr) {
if (auto E = isNotObjectErrorInvalidFileType(ChildOrErr.takeError())) {
reportError(Arc->getFileName(), ChildOrErr.takeError());
}
continue;
}
if (ObjectFile *Obj = dyn_cast<ObjectFile>(&*ChildOrErr.get()))
dumpObject(Obj, Writer);
else if (COFFImportFile *Imp = dyn_cast<COFFImportFile>(&*ChildOrErr.get()))
dumpCOFFImportFile(Imp, Writer);
else
reportError(Arc->getFileName(), readobj_error::unrecognized_file_format);
}
if (Err)
reportError(Arc->getFileName(), std::move(Err));
}
/// Dumps each object file in \a MachO Universal Binary;
static void dumpMachOUniversalBinary(const MachOUniversalBinary *UBinary,
ScopedPrinter &Writer) {
for (const MachOUniversalBinary::ObjectForArch &Obj : UBinary->objects()) {
Expected<std::unique_ptr<MachOObjectFile>> ObjOrErr = Obj.getAsObjectFile();
if (ObjOrErr)
dumpObject(&*ObjOrErr.get(), Writer);
else if (auto E = isNotObjectErrorInvalidFileType(ObjOrErr.takeError())) {
reportError(UBinary->getFileName(), ObjOrErr.takeError());
}
else if (Expected<std::unique_ptr<Archive>> AOrErr = Obj.getAsArchive())
dumpArchive(&*AOrErr.get(), Writer);
}
}
/// Dumps \a WinRes, Windows Resource (.res) file;
static void dumpWindowsResourceFile(WindowsResource *WinRes) {
ScopedPrinter Printer{outs()};
WindowsRes::Dumper Dumper(WinRes, Printer);
if (auto Err = Dumper.printData())
reportError(WinRes->getFileName(), std::move(Err));
}
/// Opens \a File and dumps it.
static void dumpInput(StringRef File) {
ScopedPrinter Writer(outs());
// Attempt to open the binary.
Expected<OwningBinary<Binary>> BinaryOrErr = createBinary(File);
if (!BinaryOrErr)
reportError(File, BinaryOrErr.takeError());
Binary &Binary = *BinaryOrErr.get().getBinary();
if (Archive *Arc = dyn_cast<Archive>(&Binary))
dumpArchive(Arc, Writer);
else if (MachOUniversalBinary *UBinary =
dyn_cast<MachOUniversalBinary>(&Binary))
dumpMachOUniversalBinary(UBinary, Writer);
else if (ObjectFile *Obj = dyn_cast<ObjectFile>(&Binary))
dumpObject(Obj, Writer);
else if (COFFImportFile *Import = dyn_cast<COFFImportFile>(&Binary))
dumpCOFFImportFile(Import, Writer);
else if (WindowsResource *WinRes = dyn_cast<WindowsResource>(&Binary))
dumpWindowsResourceFile(WinRes);
else
reportError(File, readobj_error::unrecognized_file_format);
}
/// Registers aliases that should only be allowed by readobj.
static void registerReadobjAliases() {
// -s has meant --sections for a very long time in llvm-readobj despite
// meaning --symbols in readelf.
static cl::alias SectionsShort("s", cl::desc("Alias for --section-headers"),
cl::aliasopt(opts::SectionHeaders),
cl::NotHidden);
// Only register -t in llvm-readobj, as readelf reserves it for
// --section-details (not implemented yet).
static cl::alias SymbolsShort("t", cl::desc("Alias for --symbols"),
cl::aliasopt(opts::Symbols), cl::NotHidden);
// The following two-letter aliases are only provided for readobj, as readelf
// allows single-letter args to be grouped together.
static cl::alias SectionRelocationsShort(
"sr", cl::desc("Alias for --section-relocations"),
cl::aliasopt(opts::SectionRelocations));
static cl::alias SectionDataShort("sd", cl::desc("Alias for --section-data"),
cl::aliasopt(opts::SectionData));
static cl::alias SectionSymbolsShort("st",
cl::desc("Alias for --section-symbols"),
cl::aliasopt(opts::SectionSymbols));
static cl::alias DynamicSymbolsShort("dt",
cl::desc("Alias for --dyn-symbols"),
cl::aliasopt(opts::DynamicSymbols));
}
/// Registers aliases that should only be allowed by readelf.
static void registerReadelfAliases() {
// -s is here because for readobj it means --sections.
static cl::alias SymbolsShort("s", cl::desc("Alias for --symbols"),
cl::aliasopt(opts::Symbols), cl::NotHidden,
cl::Grouping);
// Allow all single letter flags to be grouped together.
for (auto &OptEntry : cl::getRegisteredOptions()) {
StringRef ArgName = OptEntry.getKey();
cl::Option *Option = OptEntry.getValue();
if (ArgName.size() == 1)
Option->setFormattingFlag(cl::Grouping);
}
}
int main(int argc, const char *argv[]) {
InitLLVM X(argc, argv);
// Register the target printer for --version.
cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
if (sys::path::stem(argv[0]).contains("readelf")) {
opts::Output = opts::GNU;
registerReadelfAliases();
} else {
registerReadobjAliases();
}
cl::ParseCommandLineOptions(argc, argv, "LLVM Object Reader\n");
if (opts::All) {
opts::FileHeaders = true;
opts::ProgramHeaders = true;
opts::SectionHeaders = true;
opts::Symbols = true;
opts::Relocations = true;
opts::DynamicTable = true;
opts::Notes = true;
opts::VersionInfo = true;
opts::UnwindInfo = true;
opts::SectionGroups = true;
opts::HashHistogram = true;
}
if (opts::Headers) {
opts::FileHeaders = true;
opts::ProgramHeaders = true;
opts::SectionHeaders = true;
}
// Default to stdin if no filename is specified.
if (opts::InputFilenames.empty())
opts::InputFilenames.push_back("-");
llvm::for_each(opts::InputFilenames, dumpInput);
if (opts::CodeViewMergedTypes) {
ScopedPrinter W(outs());
dumpCodeViewMergedTypes(W, CVTypes.IDTable, CVTypes.TypeTable);
}
return 0;
}
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