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199640e832
For people who use llvm-readelf as a replacement of GNU readelf, they would like to see -d -r ... listed in llvm-readelf -help. It also helps understanding the confusing -s (which is unfortunately different in semantics). Reviewers: phosek, ruiu, echristo Reviewed By: ruiu, echristo Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D52129 llvm-svn: 342339
626 lines
20 KiB
C++
626 lines
20 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 "WindowsResourceDumper.h"
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#include "llvm/DebugInfo/CodeView/MergingTypeTableBuilder.h"
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#include "llvm/Object/Archive.h"
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#include "llvm/Object/COFFImportFile.h"
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#include "llvm/Object/MachOUniversal.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Object/WindowsResource.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/FormatVariadic.h"
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#include "llvm/Support/InitLLVM.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/ScopedPrinter.h"
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#include "llvm/Support/TargetRegistry.h"
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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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// -wide, -W
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cl::opt<bool> WideOutput("wide",
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cl::desc("Ignored for compatibility with GNU readelf"));
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cl::alias WideOutputShort("W",
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cl::desc("Alias for --wide"),
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cl::aliasopt(WideOutput));
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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, -S
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// Note: In GNU readelf, -s means --symbols!
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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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cl::alias SectionsShortUpper("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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// -notes, -n
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cl::opt<bool> Notes("notes", cl::desc("Display the ELF notes in the file"));
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cl::alias NotesShort("n", cl::desc("Alias for --notes"), cl::aliasopt(Notes));
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// -dyn-relocations
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cl::opt<bool> DynRelocs("dyn-relocations",
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cl::desc("Display the dynamic relocation entries in the file"));
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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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cl::alias DynamicTableShort("d", cl::desc("Alias for --dynamic-table"),
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cl::aliasopt(DynamicTable));
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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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cl::alias ProgramHeadersShort("l", cl::desc("Alias for --program-headers"),
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cl::aliasopt(ProgramHeaders));
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// -string-dump
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cl::list<std::string> StringDump("string-dump", cl::desc("<number|name>"),
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cl::ZeroOrMore);
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cl::alias StringDumpShort("p", cl::desc("Alias for --string-dump"),
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cl::aliasopt(StringDump));
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// -hex-dump
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cl::list<std::string> HexDump("hex-dump", cl::desc("<number|name>"),
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cl::ZeroOrMore);
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cl::alias HexDumpShort("x", cl::desc("Alias for --hex-dump"),
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cl::aliasopt(HexDump));
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// -hash-table
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cl::opt<bool> HashTable("hash-table",
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cl::desc("Display ELF hash table"));
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// -gnu-hash-table
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cl::opt<bool> GnuHashTable("gnu-hash-table",
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cl::desc("Display ELF .gnu.hash section"));
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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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// -raw-relr
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cl::opt<bool> RawRelr("raw-relr",
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cl::desc("Do not decode relocations in SHT_RELR section, display raw contents"));
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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-merged-types
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cl::opt<bool>
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CodeViewMergedTypes("codeview-merged-types",
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cl::desc("Display the merged CodeView type stream"));
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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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// -mips-abi-flags
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cl::opt<bool> MipsABIFlags("mips-abi-flags",
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cl::desc("Display the MIPS.abiflags section"));
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// -mips-reginfo
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cl::opt<bool> MipsReginfo("mips-reginfo",
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cl::desc("Display the MIPS .reginfo section"));
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// -mips-options
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cl::opt<bool> MipsOptions("mips-options",
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cl::desc("Display the MIPS .MIPS.options section"));
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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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// -coff-debug-directory
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cl::opt<bool>
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COFFDebugDirectory("coff-debug-directory",
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cl::desc("Display the PE/COFF debug directory"));
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// -coff-resources
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cl::opt<bool> COFFResources("coff-resources",
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cl::desc("Display the PE/COFF .rsrc section"));
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// -coff-load-config
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cl::opt<bool>
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COFFLoadConfig("coff-load-config",
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cl::desc("Display the PE/COFF load config"));
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// -elf-linker-options
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cl::opt<bool>
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ELFLinkerOptions("elf-linker-options",
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cl::desc("Display the ELF .linker-options section"));
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// -macho-data-in-code
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cl::opt<bool>
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MachODataInCode("macho-data-in-code",
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cl::desc("Display MachO Data in Code command"));
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// -macho-indirect-symbols
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cl::opt<bool>
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MachOIndirectSymbols("macho-indirect-symbols",
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cl::desc("Display MachO indirect symbols"));
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// -macho-linker-options
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cl::opt<bool>
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MachOLinkerOptions("macho-linker-options",
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cl::desc("Display MachO linker options"));
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// -macho-segment
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cl::opt<bool>
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MachOSegment("macho-segment",
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cl::desc("Display MachO Segment command"));
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// -macho-version-min
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cl::opt<bool>
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MachOVersionMin("macho-version-min",
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cl::desc("Display MachO version min command"));
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// -macho-dysymtab
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cl::opt<bool>
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MachODysymtab("macho-dysymtab",
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cl::desc("Display MachO Dysymtab command"));
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// -stackmap
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cl::opt<bool>
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PrintStackMap("stackmap",
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cl::desc("Display contents of stackmap section"));
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// -version-info
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cl::opt<bool>
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VersionInfo("version-info",
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cl::desc("Display ELF version sections (if present)"));
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cl::alias VersionInfoShort("V", cl::desc("Alias for -version-info"),
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cl::aliasopt(VersionInfo));
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cl::opt<bool> SectionGroups("elf-section-groups",
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cl::desc("Display ELF section group contents"));
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cl::alias SectionGroupsShort("g", cl::desc("Alias for -elf-sections-groups"),
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cl::aliasopt(SectionGroups));
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cl::opt<bool> HashHistogram(
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"elf-hash-histogram",
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cl::desc("Display bucket list histogram for hash sections"));
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cl::alias HashHistogramShort("I", cl::desc("Alias for -elf-hash-histogram"),
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cl::aliasopt(HashHistogram));
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cl::opt<bool> CGProfile("elf-cg-profile", cl::desc("Display callgraph profile section"));
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cl::opt<bool> Addrsig("addrsig",
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cl::desc("Display address-significance table"));
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cl::opt<OutputStyleTy>
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Output("elf-output-style", cl::desc("Specify ELF dump style"),
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cl::values(clEnumVal(LLVM, "LLVM default style"),
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clEnumVal(GNU, "GNU readelf style")),
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cl::init(LLVM));
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} // namespace opts
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namespace llvm {
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LLVM_ATTRIBUTE_NORETURN void reportError(Twine Msg) {
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errs() << "\nError reading file: " << Msg << ".\n";
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errs().flush();
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exit(1);
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}
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void error(Error EC) {
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if (!EC)
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return;
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handleAllErrors(std::move(EC),
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[&](const ErrorInfoBase &EI) { reportError(EI.message()); });
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}
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void error(std::error_code EC) {
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if (!EC)
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return;
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reportError(EC.message());
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}
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bool relocAddressLess(RelocationRef a, RelocationRef b) {
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return a.getOffset() < b.getOffset();
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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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reportError(Twine(Input) + ": " + EC.message());
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}
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static void reportError(StringRef Input, Error Err) {
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if (Input == "-")
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Input = "<stdin>";
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std::string ErrMsg;
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{
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raw_string_ostream ErrStream(ErrMsg);
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logAllUnhandledErrors(std::move(Err), ErrStream, Input + ": ");
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}
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reportError(ErrMsg);
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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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namespace {
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struct ReadObjTypeTableBuilder {
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ReadObjTypeTableBuilder()
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: Allocator(), IDTable(Allocator), TypeTable(Allocator) {}
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llvm::BumpPtrAllocator Allocator;
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llvm::codeview::MergingTypeTableBuilder IDTable;
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llvm::codeview::MergingTypeTableBuilder TypeTable;
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};
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}
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static ReadObjTypeTableBuilder CVTypes;
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/// Creates an format-specific object file dumper.
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static std::error_code createDumper(const ObjectFile *Obj,
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ScopedPrinter &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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if (Obj->isWasm())
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return createWasmDumper(Obj, Writer, Result);
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return readobj_error::unsupported_obj_file_format;
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}
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/// Dumps the specified object file.
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static void dumpObject(const ObjectFile *Obj, ScopedPrinter &Writer) {
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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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if (opts::Output == opts::LLVM) {
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Writer.startLine() << "\n";
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Writer.printString("File", Obj->getFileName());
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Writer.printString("Format", Obj->getFileFormatName());
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Writer.printString("Arch", Triple::getArchTypeName(
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(llvm::Triple::ArchType)Obj->getArch()));
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Writer.printString("AddressSize",
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formatv("{0}bit", 8 * Obj->getBytesInAddress()));
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Dumper->printLoadName();
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}
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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::DynRelocs)
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Dumper->printDynamicRelocations();
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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 (!opts::StringDump.empty())
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llvm::for_each(opts::StringDump, [&Dumper, Obj](StringRef SectionName) {
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Dumper->printSectionAsString(Obj, SectionName);
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});
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if (!opts::HexDump.empty())
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llvm::for_each(opts::HexDump, [&Dumper, Obj](StringRef SectionName) {
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Dumper->printSectionAsHex(Obj, SectionName);
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});
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if (opts::HashTable)
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Dumper->printHashTable();
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if (opts::GnuHashTable)
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Dumper->printGnuHashTable();
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if (opts::VersionInfo)
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Dumper->printVersionInfo();
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if (Obj->isELF()) {
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if (opts::ELFLinkerOptions)
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Dumper->printELFLinkerOptions();
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if (Obj->getArch() == llvm::Triple::arm)
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if (opts::ARMAttributes)
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Dumper->printAttributes();
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if (isMipsArch(Obj->getArch())) {
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if (opts::MipsPLTGOT)
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Dumper->printMipsPLTGOT();
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if (opts::MipsABIFlags)
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Dumper->printMipsABIFlags();
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if (opts::MipsReginfo)
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Dumper->printMipsReginfo();
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if (opts::MipsOptions)
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Dumper->printMipsOptions();
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}
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if (opts::SectionGroups)
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Dumper->printGroupSections();
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if (opts::HashHistogram)
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Dumper->printHashHistogram();
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if (opts::CGProfile)
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Dumper->printCGProfile();
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if (opts::Addrsig)
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Dumper->printAddrsig();
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if (opts::Notes)
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Dumper->printNotes();
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}
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if (Obj->isCOFF()) {
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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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if (opts::COFFDebugDirectory)
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Dumper->printCOFFDebugDirectory();
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if (opts::COFFResources)
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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);
|
|
}
|
|
|
|
int main(int argc, const char *argv[]) {
|
|
InitLLVM X(argc, argv);
|
|
|
|
// Register the target printer for --version.
|
|
cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
|
|
|
|
// Make some commonly used short options visibile in -help.
|
|
opts::DynamicTableShort.setHiddenFlag(cl::NotHidden);
|
|
opts::FileHeadersShort.setHiddenFlag(cl::NotHidden);
|
|
opts::ProgramHeadersShort.setHiddenFlag(cl::NotHidden);
|
|
opts::RelocationsShort.setHiddenFlag(cl::NotHidden);
|
|
opts::SectionsShort.setHiddenFlag(cl::NotHidden);
|
|
opts::SectionsShortUpper.setHiddenFlag(cl::NotHidden);
|
|
opts::SymbolsShort.setHiddenFlag(cl::NotHidden);
|
|
|
|
opts::WideOutput.setHiddenFlag(cl::Hidden);
|
|
|
|
if (sys::path::stem(argv[0]).find("readelf") != StringRef::npos)
|
|
opts::Output = opts::GNU;
|
|
|
|
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("-");
|
|
|
|
llvm::for_each(opts::InputFilenames, dumpInput);
|
|
|
|
if (opts::CodeViewMergedTypes) {
|
|
ScopedPrinter W(outs());
|
|
dumpCodeViewMergedTypes(W, CVTypes.IDTable, CVTypes.TypeTable);
|
|
}
|
|
|
|
return 0;
|
|
}
|