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llvm-mirror/tools/llvm-readobj/MachODumper.cpp
Paul Semel e5caf328a5 [llvm-readobj] Generic hex-dump option 
Helpers are available to make this option file format independant. This
patch adds the feature for Wasm file format. It doesn't change the
behavior of the other file format handling.

Differential Revision: https://reviews.llvm.org/D49545

llvm-svn: 337896
2018-07-25 10:04:37 +00:00

874 lines
30 KiB
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//===-- MachODump.cpp - Object file dumping utility for llvm --------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the MachO-specific dumper for llvm-readobj.
//
//===----------------------------------------------------------------------===//
#include "Error.h"
#include "ObjDumper.h"
#include "StackMapPrinter.h"
#include "llvm-readobj.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Object/MachO.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ScopedPrinter.h"
using namespace llvm;
using namespace object;
namespace {
class MachODumper : public ObjDumper {
public:
MachODumper(const MachOObjectFile *Obj, ScopedPrinter &Writer)
: ObjDumper(Writer), Obj(Obj) {}
void printFileHeaders() override;
void printSections() override;
void printRelocations() override;
void printSymbols() override;
void printDynamicSymbols() override;
void printUnwindInfo() override;
void printStackMap() const override;
void printNeededLibraries() override;
// MachO-specific.
void printMachODataInCode() override;
void printMachOVersionMin() override;
void printMachODysymtab() override;
void printMachOSegment() override;
void printMachOIndirectSymbols() override;
void printMachOLinkerOptions () override;
private:
template<class MachHeader>
void printFileHeaders(const MachHeader &Header);
void printSymbol(const SymbolRef &Symbol);
void printRelocation(const RelocationRef &Reloc);
void printRelocation(const MachOObjectFile *Obj, const RelocationRef &Reloc);
void printSections(const MachOObjectFile *Obj);
const MachOObjectFile *Obj;
};
} // namespace
namespace llvm {
std::error_code createMachODumper(const object::ObjectFile *Obj,
ScopedPrinter &Writer,
std::unique_ptr<ObjDumper> &Result) {
const MachOObjectFile *MachOObj = dyn_cast<MachOObjectFile>(Obj);
if (!MachOObj)
return readobj_error::unsupported_obj_file_format;
Result.reset(new MachODumper(MachOObj, Writer));
return readobj_error::success;
}
} // namespace llvm
static const EnumEntry<uint32_t> MachOMagics[] = {
{ "Magic", MachO::MH_MAGIC },
{ "Cigam", MachO::MH_CIGAM },
{ "Magic64", MachO::MH_MAGIC_64 },
{ "Cigam64", MachO::MH_CIGAM_64 },
{ "FatMagic", MachO::FAT_MAGIC },
{ "FatCigam", MachO::FAT_CIGAM },
};
static const EnumEntry<uint32_t> MachOHeaderFileTypes[] = {
{ "Relocatable", MachO::MH_OBJECT },
{ "Executable", MachO::MH_EXECUTE },
{ "FixedVMLibrary", MachO::MH_FVMLIB },
{ "Core", MachO::MH_CORE },
{ "PreloadedExecutable", MachO::MH_PRELOAD },
{ "DynamicLibrary", MachO::MH_DYLIB },
{ "DynamicLinker", MachO::MH_DYLINKER },
{ "Bundle", MachO::MH_BUNDLE },
{ "DynamicLibraryStub", MachO::MH_DYLIB_STUB },
{ "DWARFSymbol", MachO::MH_DSYM },
{ "KextBundle", MachO::MH_KEXT_BUNDLE },
};
static const EnumEntry<uint32_t> MachOHeaderCpuTypes[] = {
{ "Any" , static_cast<uint32_t>(MachO::CPU_TYPE_ANY) },
{ "X86" , MachO::CPU_TYPE_X86 },
{ "X86-64" , MachO::CPU_TYPE_X86_64 },
{ "Mc98000" , MachO::CPU_TYPE_MC98000 },
{ "Arm" , MachO::CPU_TYPE_ARM },
{ "Arm64" , MachO::CPU_TYPE_ARM64 },
{ "Sparc" , MachO::CPU_TYPE_SPARC },
{ "PowerPC" , MachO::CPU_TYPE_POWERPC },
{ "PowerPC64" , MachO::CPU_TYPE_POWERPC64 },
};
static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX86[] = {
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_I386_ALL),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_386),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_486SX),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_586),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTPRO),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M3),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTII_M5),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_CELERON_MOBILE),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_M),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_3_XEON),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_M),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_PENTIUM_4_M),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ITANIUM_2),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_XEON_MP),
};
static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesX64[] = {
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_ALL),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_ARCH1),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_X86_64_H),
};
static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM[] = {
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_ALL),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V4T),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V5TEJ),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_XSCALE),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7S),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7K),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V6M),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7M),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM_V7EM),
};
static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesARM64[] = {
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_ARM64_ALL),
};
static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesSPARC[] = {
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_SPARC_ALL),
};
static const EnumEntry<uint32_t> MachOHeaderCpuSubtypesPPC[] = {
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_ALL),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_601),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_602),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603e),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_603ev),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_604e),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_620),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_750),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7400),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_7450),
LLVM_READOBJ_ENUM_ENT(MachO, CPU_SUBTYPE_POWERPC_970),
};
static const EnumEntry<uint32_t> MachOHeaderFlags[] = {
LLVM_READOBJ_ENUM_ENT(MachO, MH_NOUNDEFS),
LLVM_READOBJ_ENUM_ENT(MachO, MH_INCRLINK),
LLVM_READOBJ_ENUM_ENT(MachO, MH_DYLDLINK),
LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDATLOAD),
LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBOUND),
LLVM_READOBJ_ENUM_ENT(MachO, MH_SPLIT_SEGS),
LLVM_READOBJ_ENUM_ENT(MachO, MH_LAZY_INIT),
LLVM_READOBJ_ENUM_ENT(MachO, MH_TWOLEVEL),
LLVM_READOBJ_ENUM_ENT(MachO, MH_FORCE_FLAT),
LLVM_READOBJ_ENUM_ENT(MachO, MH_NOMULTIDEFS),
LLVM_READOBJ_ENUM_ENT(MachO, MH_NOFIXPREBINDING),
LLVM_READOBJ_ENUM_ENT(MachO, MH_PREBINDABLE),
LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLMODSBOUND),
LLVM_READOBJ_ENUM_ENT(MachO, MH_SUBSECTIONS_VIA_SYMBOLS),
LLVM_READOBJ_ENUM_ENT(MachO, MH_CANONICAL),
LLVM_READOBJ_ENUM_ENT(MachO, MH_WEAK_DEFINES),
LLVM_READOBJ_ENUM_ENT(MachO, MH_BINDS_TO_WEAK),
LLVM_READOBJ_ENUM_ENT(MachO, MH_ALLOW_STACK_EXECUTION),
LLVM_READOBJ_ENUM_ENT(MachO, MH_ROOT_SAFE),
LLVM_READOBJ_ENUM_ENT(MachO, MH_SETUID_SAFE),
LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_REEXPORTED_DYLIBS),
LLVM_READOBJ_ENUM_ENT(MachO, MH_PIE),
LLVM_READOBJ_ENUM_ENT(MachO, MH_DEAD_STRIPPABLE_DYLIB),
LLVM_READOBJ_ENUM_ENT(MachO, MH_HAS_TLV_DESCRIPTORS),
LLVM_READOBJ_ENUM_ENT(MachO, MH_NO_HEAP_EXECUTION),
LLVM_READOBJ_ENUM_ENT(MachO, MH_APP_EXTENSION_SAFE),
};
static const EnumEntry<unsigned> MachOSectionAttributes[] = {
{ "LocReloc" , 1 << 0 /*S_ATTR_LOC_RELOC */ },
{ "ExtReloc" , 1 << 1 /*S_ATTR_EXT_RELOC */ },
{ "SomeInstructions" , 1 << 2 /*S_ATTR_SOME_INSTRUCTIONS */ },
{ "Debug" , 1 << 17 /*S_ATTR_DEBUG */ },
{ "SelfModifyingCode", 1 << 18 /*S_ATTR_SELF_MODIFYING_CODE*/ },
{ "LiveSupport" , 1 << 19 /*S_ATTR_LIVE_SUPPORT */ },
{ "NoDeadStrip" , 1 << 20 /*S_ATTR_NO_DEAD_STRIP */ },
{ "StripStaticSyms" , 1 << 21 /*S_ATTR_STRIP_STATIC_SYMS */ },
{ "NoTOC" , 1 << 22 /*S_ATTR_NO_TOC */ },
{ "PureInstructions" , 1 << 23 /*S_ATTR_PURE_INSTRUCTIONS */ },
};
static const EnumEntry<unsigned> MachOSymbolRefTypes[] = {
{ "UndefinedNonLazy", 0 },
{ "ReferenceFlagUndefinedLazy", 1 },
{ "ReferenceFlagDefined", 2 },
{ "ReferenceFlagPrivateDefined", 3 },
{ "ReferenceFlagPrivateUndefinedNonLazy", 4 },
{ "ReferenceFlagPrivateUndefinedLazy", 5 }
};
static const EnumEntry<unsigned> MachOSymbolFlags[] = {
{ "ReferencedDynamically", 0x10 },
{ "NoDeadStrip", 0x20 },
{ "WeakRef", 0x40 },
{ "WeakDef", 0x80 },
{ "AltEntry", 0x200 },
};
static const EnumEntry<unsigned> MachOSymbolTypes[] = {
{ "Undef", 0x0 },
{ "Abs", 0x2 },
{ "Indirect", 0xA },
{ "PreboundUndef", 0xC },
{ "Section", 0xE }
};
namespace {
struct MachOSection {
ArrayRef<char> Name;
ArrayRef<char> SegmentName;
uint64_t Address;
uint64_t Size;
uint32_t Offset;
uint32_t Alignment;
uint32_t RelocationTableOffset;
uint32_t NumRelocationTableEntries;
uint32_t Flags;
uint32_t Reserved1;
uint32_t Reserved2;
uint32_t Reserved3;
};
struct MachOSegment {
std::string CmdName;
std::string SegName;
uint64_t cmdsize;
uint64_t vmaddr;
uint64_t vmsize;
uint64_t fileoff;
uint64_t filesize;
uint32_t maxprot;
uint32_t initprot;
uint32_t nsects;
uint32_t flags;
};
struct MachOSymbol {
uint32_t StringIndex;
uint8_t Type;
uint8_t SectionIndex;
uint16_t Flags;
uint64_t Value;
};
}
static std::string getMask(uint32_t prot)
{
// TODO (davide): This always assumes prot is valid.
// Catch mistakes and report if needed.
std::string Prot;
Prot = "";
Prot += (prot & MachO::VM_PROT_READ) ? "r" : "-";
Prot += (prot & MachO::VM_PROT_WRITE) ? "w" : "-";
Prot += (prot & MachO::VM_PROT_EXECUTE) ? "x" : "-";
return Prot;
}
static void getSection(const MachOObjectFile *Obj,
DataRefImpl Sec,
MachOSection &Section) {
if (!Obj->is64Bit()) {
MachO::section Sect = Obj->getSection(Sec);
Section.Address = Sect.addr;
Section.Size = Sect.size;
Section.Offset = Sect.offset;
Section.Alignment = Sect.align;
Section.RelocationTableOffset = Sect.reloff;
Section.NumRelocationTableEntries = Sect.nreloc;
Section.Flags = Sect.flags;
Section.Reserved1 = Sect.reserved1;
Section.Reserved2 = Sect.reserved2;
return;
}
MachO::section_64 Sect = Obj->getSection64(Sec);
Section.Address = Sect.addr;
Section.Size = Sect.size;
Section.Offset = Sect.offset;
Section.Alignment = Sect.align;
Section.RelocationTableOffset = Sect.reloff;
Section.NumRelocationTableEntries = Sect.nreloc;
Section.Flags = Sect.flags;
Section.Reserved1 = Sect.reserved1;
Section.Reserved2 = Sect.reserved2;
Section.Reserved3 = Sect.reserved3;
}
static void getSegment(const MachOObjectFile *Obj,
const MachOObjectFile::LoadCommandInfo &L,
MachOSegment &Segment) {
if (!Obj->is64Bit()) {
MachO::segment_command SC = Obj->getSegmentLoadCommand(L);
Segment.CmdName = "LC_SEGMENT";
Segment.SegName = SC.segname;
Segment.cmdsize = SC.cmdsize;
Segment.vmaddr = SC.vmaddr;
Segment.vmsize = SC.vmsize;
Segment.fileoff = SC.fileoff;
Segment.filesize = SC.filesize;
Segment.maxprot = SC.maxprot;
Segment.initprot = SC.initprot;
Segment.nsects = SC.nsects;
Segment.flags = SC.flags;
return;
}
MachO::segment_command_64 SC = Obj->getSegment64LoadCommand(L);
Segment.CmdName = "LC_SEGMENT_64";
Segment.SegName = SC.segname;
Segment.cmdsize = SC.cmdsize;
Segment.vmaddr = SC.vmaddr;
Segment.vmsize = SC.vmsize;
Segment.fileoff = SC.fileoff;
Segment.filesize = SC.filesize;
Segment.maxprot = SC.maxprot;
Segment.initprot = SC.initprot;
Segment.nsects = SC.nsects;
Segment.flags = SC.flags;
}
static void getSymbol(const MachOObjectFile *Obj,
DataRefImpl DRI,
MachOSymbol &Symbol) {
if (!Obj->is64Bit()) {
MachO::nlist Entry = Obj->getSymbolTableEntry(DRI);
Symbol.StringIndex = Entry.n_strx;
Symbol.Type = Entry.n_type;
Symbol.SectionIndex = Entry.n_sect;
Symbol.Flags = Entry.n_desc;
Symbol.Value = Entry.n_value;
return;
}
MachO::nlist_64 Entry = Obj->getSymbol64TableEntry(DRI);
Symbol.StringIndex = Entry.n_strx;
Symbol.Type = Entry.n_type;
Symbol.SectionIndex = Entry.n_sect;
Symbol.Flags = Entry.n_desc;
Symbol.Value = Entry.n_value;
}
void MachODumper::printFileHeaders() {
DictScope H(W, "MachHeader");
if (!Obj->is64Bit()) {
printFileHeaders(Obj->getHeader());
} else {
printFileHeaders(Obj->getHeader64());
W.printHex("Reserved", Obj->getHeader64().reserved);
}
}
template<class MachHeader>
void MachODumper::printFileHeaders(const MachHeader &Header) {
W.printEnum("Magic", Header.magic, makeArrayRef(MachOMagics));
W.printEnum("CpuType", Header.cputype, makeArrayRef(MachOHeaderCpuTypes));
uint32_t subtype = Header.cpusubtype & ~MachO::CPU_SUBTYPE_MASK;
switch (Header.cputype) {
case MachO::CPU_TYPE_X86:
W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX86));
break;
case MachO::CPU_TYPE_X86_64:
W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesX64));
break;
case MachO::CPU_TYPE_ARM:
W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM));
break;
case MachO::CPU_TYPE_POWERPC:
W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesPPC));
break;
case MachO::CPU_TYPE_SPARC:
W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesSPARC));
break;
case MachO::CPU_TYPE_ARM64:
W.printEnum("CpuSubType", subtype, makeArrayRef(MachOHeaderCpuSubtypesARM64));
break;
case MachO::CPU_TYPE_POWERPC64:
default:
W.printHex("CpuSubtype", subtype);
}
W.printEnum("FileType", Header.filetype, makeArrayRef(MachOHeaderFileTypes));
W.printNumber("NumOfLoadCommands", Header.ncmds);
W.printNumber("SizeOfLoadCommands", Header.sizeofcmds);
W.printFlags("Flags", Header.flags, makeArrayRef(MachOHeaderFlags));
}
void MachODumper::printSections() {
return printSections(Obj);
}
void MachODumper::printSections(const MachOObjectFile *Obj) {
ListScope Group(W, "Sections");
int SectionIndex = -1;
for (const SectionRef &Section : Obj->sections()) {
++SectionIndex;
MachOSection MOSection;
getSection(Obj, Section.getRawDataRefImpl(), MOSection);
DataRefImpl DR = Section.getRawDataRefImpl();
StringRef Name;
error(Section.getName(Name));
ArrayRef<char> RawName = Obj->getSectionRawName(DR);
StringRef SegmentName = Obj->getSectionFinalSegmentName(DR);
ArrayRef<char> RawSegmentName = Obj->getSectionRawFinalSegmentName(DR);
DictScope SectionD(W, "Section");
W.printNumber("Index", SectionIndex);
W.printBinary("Name", Name, RawName);
W.printBinary("Segment", SegmentName, RawSegmentName);
W.printHex("Address", MOSection.Address);
W.printHex("Size", MOSection.Size);
W.printNumber("Offset", MOSection.Offset);
W.printNumber("Alignment", MOSection.Alignment);
W.printHex("RelocationOffset", MOSection.RelocationTableOffset);
W.printNumber("RelocationCount", MOSection.NumRelocationTableEntries);
W.printEnum("Type", MOSection.Flags & 0xFF,
makeArrayRef(MachOSectionAttributes));
W.printFlags("Attributes", MOSection.Flags >> 8,
makeArrayRef(MachOSectionAttributes));
W.printHex("Reserved1", MOSection.Reserved1);
W.printHex("Reserved2", MOSection.Reserved2);
if (Obj->is64Bit())
W.printHex("Reserved3", MOSection.Reserved3);
if (opts::SectionRelocations) {
ListScope D(W, "Relocations");
for (const RelocationRef &Reloc : Section.relocations())
printRelocation(Reloc);
}
if (opts::SectionSymbols) {
ListScope D(W, "Symbols");
for (const SymbolRef &Symbol : Obj->symbols()) {
if (!Section.containsSymbol(Symbol))
continue;
printSymbol(Symbol);
}
}
if (opts::SectionData) {
bool IsBSS = Section.isBSS();
if (!IsBSS) {
StringRef Data;
error(Section.getContents(Data));
W.printBinaryBlock("SectionData", Data);
}
}
}
}
void MachODumper::printRelocations() {
ListScope D(W, "Relocations");
std::error_code EC;
for (const SectionRef &Section : Obj->sections()) {
StringRef Name;
error(Section.getName(Name));
bool PrintedGroup = false;
for (const RelocationRef &Reloc : Section.relocations()) {
if (!PrintedGroup) {
W.startLine() << "Section " << Name << " {\n";
W.indent();
PrintedGroup = true;
}
printRelocation(Reloc);
}
if (PrintedGroup) {
W.unindent();
W.startLine() << "}\n";
}
}
}
void MachODumper::printRelocation(const RelocationRef &Reloc) {
return printRelocation(Obj, Reloc);
}
void MachODumper::printRelocation(const MachOObjectFile *Obj,
const RelocationRef &Reloc) {
uint64_t Offset = Reloc.getOffset();
SmallString<32> RelocName;
Reloc.getTypeName(RelocName);
DataRefImpl DR = Reloc.getRawDataRefImpl();
MachO::any_relocation_info RE = Obj->getRelocation(DR);
bool IsScattered = Obj->isRelocationScattered(RE);
bool IsExtern = !IsScattered && Obj->getPlainRelocationExternal(RE);
StringRef TargetName;
if (IsExtern) {
symbol_iterator Symbol = Reloc.getSymbol();
if (Symbol != Obj->symbol_end()) {
Expected<StringRef> TargetNameOrErr = Symbol->getName();
if (!TargetNameOrErr)
error(errorToErrorCode(TargetNameOrErr.takeError()));
TargetName = *TargetNameOrErr;
}
} else if (!IsScattered) {
section_iterator SecI = Obj->getRelocationSection(DR);
if (SecI != Obj->section_end()) {
error(SecI->getName(TargetName));
}
}
if (TargetName.empty())
TargetName = "-";
if (opts::ExpandRelocs) {
DictScope Group(W, "Relocation");
W.printHex("Offset", Offset);
W.printNumber("PCRel", Obj->getAnyRelocationPCRel(RE));
W.printNumber("Length", Obj->getAnyRelocationLength(RE));
W.printNumber("Type", RelocName, Obj->getAnyRelocationType(RE));
if (IsScattered) {
W.printHex("Value", Obj->getScatteredRelocationValue(RE));
} else {
const char *Kind = IsExtern ? "Symbol" : "Section";
W.printNumber(Kind, TargetName, Obj->getPlainRelocationSymbolNum(RE));
}
} else {
SmallString<32> SymbolNameOrOffset("0x");
if (IsScattered) {
// Scattered relocations don't really have an associated symbol for some
// reason, even if one exists in the symtab at the correct address.
SymbolNameOrOffset += utohexstr(Obj->getScatteredRelocationValue(RE));
} else {
SymbolNameOrOffset = TargetName;
}
raw_ostream& OS = W.startLine();
OS << W.hex(Offset)
<< " " << Obj->getAnyRelocationPCRel(RE)
<< " " << Obj->getAnyRelocationLength(RE);
if (IsScattered)
OS << " n/a";
else
OS << " " << Obj->getPlainRelocationExternal(RE);
OS << " " << RelocName
<< " " << IsScattered
<< " " << SymbolNameOrOffset
<< "\n";
}
}
void MachODumper::printSymbols() {
ListScope Group(W, "Symbols");
for (const SymbolRef &Symbol : Obj->symbols()) {
printSymbol(Symbol);
}
}
void MachODumper::printDynamicSymbols() {
ListScope Group(W, "DynamicSymbols");
}
void MachODumper::printSymbol(const SymbolRef &Symbol) {
StringRef SymbolName;
Expected<StringRef> SymbolNameOrErr = Symbol.getName();
if (!SymbolNameOrErr) {
// TODO: Actually report errors helpfully.
consumeError(SymbolNameOrErr.takeError());
} else
SymbolName = *SymbolNameOrErr;
MachOSymbol MOSymbol;
getSymbol(Obj, Symbol.getRawDataRefImpl(), MOSymbol);
StringRef SectionName = "";
Expected<section_iterator> SecIOrErr = Symbol.getSection();
error(errorToErrorCode(SecIOrErr.takeError()));
section_iterator SecI = *SecIOrErr;
if (SecI != Obj->section_end())
error(SecI->getName(SectionName));
DictScope D(W, "Symbol");
W.printNumber("Name", SymbolName, MOSymbol.StringIndex);
if (MOSymbol.Type & MachO::N_STAB) {
W.printHex("Type", "SymDebugTable", MOSymbol.Type);
} else {
if (MOSymbol.Type & MachO::N_PEXT)
W.startLine() << "PrivateExtern\n";
if (MOSymbol.Type & MachO::N_EXT)
W.startLine() << "Extern\n";
W.printEnum("Type", uint8_t(MOSymbol.Type & MachO::N_TYPE),
makeArrayRef(MachOSymbolTypes));
}
W.printHex("Section", SectionName, MOSymbol.SectionIndex);
W.printEnum("RefType", static_cast<uint16_t>(MOSymbol.Flags & 0xF),
makeArrayRef(MachOSymbolRefTypes));
W.printFlags("Flags", static_cast<uint16_t>(MOSymbol.Flags & ~0xF),
makeArrayRef(MachOSymbolFlags));
W.printHex("Value", MOSymbol.Value);
}
void MachODumper::printUnwindInfo() {
W.startLine() << "UnwindInfo not implemented.\n";
}
void MachODumper::printStackMap() const {
object::SectionRef StackMapSection;
for (auto Sec : Obj->sections()) {
StringRef Name;
Sec.getName(Name);
if (Name == "__llvm_stackmaps") {
StackMapSection = Sec;
break;
}
}
if (StackMapSection == object::SectionRef())
return;
StringRef StackMapContents;
StackMapSection.getContents(StackMapContents);
ArrayRef<uint8_t> StackMapContentsArray(
reinterpret_cast<const uint8_t*>(StackMapContents.data()),
StackMapContents.size());
if (Obj->isLittleEndian())
prettyPrintStackMap(
W, StackMapV2Parser<support::little>(StackMapContentsArray));
else
prettyPrintStackMap(W,
StackMapV2Parser<support::big>(StackMapContentsArray));
}
void MachODumper::printNeededLibraries() {
ListScope D(W, "NeededLibraries");
using LibsTy = std::vector<StringRef>;
LibsTy Libs;
for (const auto &Command : Obj->load_commands()) {
if (Command.C.cmd == MachO::LC_LOAD_DYLIB ||
Command.C.cmd == MachO::LC_ID_DYLIB ||
Command.C.cmd == MachO::LC_LOAD_WEAK_DYLIB ||
Command.C.cmd == MachO::LC_REEXPORT_DYLIB ||
Command.C.cmd == MachO::LC_LAZY_LOAD_DYLIB ||
Command.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
MachO::dylib_command Dl = Obj->getDylibIDLoadCommand(Command);
if (Dl.dylib.name < Dl.cmdsize) {
auto *P = static_cast<const char*>(Command.Ptr) + Dl.dylib.name;
Libs.push_back(P);
}
}
}
std::stable_sort(Libs.begin(), Libs.end());
for (const auto &L : Libs) {
outs() << " " << L << "\n";
}
}
void MachODumper::printMachODataInCode() {
for (const auto &Load : Obj->load_commands()) {
if (Load.C.cmd == MachO::LC_DATA_IN_CODE) {
MachO::linkedit_data_command LLC = Obj->getLinkeditDataLoadCommand(Load);
DictScope Group(W, "DataInCode");
W.printNumber("Data offset", LLC.dataoff);
W.printNumber("Data size", LLC.datasize);
ListScope D(W, "Data entries");
unsigned NumRegions = LLC.datasize / sizeof(MachO::data_in_code_entry);
for (unsigned i = 0; i < NumRegions; ++i) {
MachO::data_in_code_entry DICE = Obj->getDataInCodeTableEntry(
LLC.dataoff, i);
DictScope Group(W, "Entry");
W.printNumber("Index", i);
W.printNumber("Offset", DICE.offset);
W.printNumber("Length", DICE.length);
W.printNumber("Kind", DICE.kind);
}
}
}
}
void MachODumper::printMachOVersionMin() {
for (const auto &Load : Obj->load_commands()) {
StringRef Cmd;
switch (Load.C.cmd) {
case MachO::LC_VERSION_MIN_MACOSX:
Cmd = "LC_VERSION_MIN_MACOSX";
break;
case MachO::LC_VERSION_MIN_IPHONEOS:
Cmd = "LC_VERSION_MIN_IPHONEOS";
break;
case MachO::LC_VERSION_MIN_TVOS:
Cmd = "LC_VERSION_MIN_TVOS";
break;
case MachO::LC_VERSION_MIN_WATCHOS:
Cmd = "LC_VERSION_MIN_WATCHOS";
break;
case MachO::LC_BUILD_VERSION:
Cmd = "LC_BUILD_VERSION";
break;
default:
continue;
}
DictScope Group(W, "MinVersion");
// Handle LC_BUILD_VERSION.
if (Load.C.cmd == MachO::LC_BUILD_VERSION) {
MachO::build_version_command BVC = Obj->getBuildVersionLoadCommand(Load);
W.printString("Cmd", Cmd);
W.printNumber("Size", BVC.cmdsize);
W.printString("Platform",
MachOObjectFile::getBuildPlatform(BVC.platform));
W.printString("Version", MachOObjectFile::getVersionString(BVC.minos));
if (BVC.sdk)
W.printString("SDK", MachOObjectFile::getVersionString(BVC.sdk));
else
W.printString("SDK", StringRef("n/a"));
continue;
}
MachO::version_min_command VMC = Obj->getVersionMinLoadCommand(Load);
W.printString("Cmd", Cmd);
W.printNumber("Size", VMC.cmdsize);
SmallString<32> Version;
Version = utostr(MachOObjectFile::getVersionMinMajor(VMC, false)) + "." +
utostr(MachOObjectFile::getVersionMinMinor(VMC, false));
uint32_t Update = MachOObjectFile::getVersionMinUpdate(VMC, false);
if (Update != 0)
Version += "." + utostr(MachOObjectFile::getVersionMinUpdate(VMC, false));
W.printString("Version", Version);
SmallString<32> SDK;
if (VMC.sdk == 0)
SDK = "n/a";
else {
SDK = utostr(MachOObjectFile::getVersionMinMajor(VMC, true)) + "." +
utostr(MachOObjectFile::getVersionMinMinor(VMC, true));
uint32_t Update = MachOObjectFile::getVersionMinUpdate(VMC, true);
if (Update != 0)
SDK += "." + utostr(MachOObjectFile::getVersionMinUpdate(VMC, true));
}
W.printString("SDK", SDK);
}
}
void MachODumper::printMachODysymtab() {
for (const auto &Load : Obj->load_commands()) {
if (Load.C.cmd == MachO::LC_DYSYMTAB) {
MachO::dysymtab_command DLC = Obj->getDysymtabLoadCommand();
DictScope Group(W, "Dysymtab");
W.printNumber("ilocalsym", DLC.ilocalsym);
W.printNumber("nlocalsym", DLC.nlocalsym);
W.printNumber("iextdefsym", DLC.iextdefsym);
W.printNumber("nextdefsym", DLC.nextdefsym);
W.printNumber("iundefsym", DLC.iundefsym);
W.printNumber("nundefsym", DLC.nundefsym);
W.printNumber("tocoff", DLC.tocoff);
W.printNumber("ntoc", DLC.ntoc);
W.printNumber("modtaboff", DLC.modtaboff);
W.printNumber("nmodtab", DLC.nmodtab);
W.printNumber("extrefsymoff", DLC.extrefsymoff);
W.printNumber("nextrefsyms", DLC.nextrefsyms);
W.printNumber("indirectsymoff", DLC.indirectsymoff);
W.printNumber("nindirectsyms", DLC.nindirectsyms);
W.printNumber("extreloff", DLC.extreloff);
W.printNumber("nextrel", DLC.nextrel);
W.printNumber("locreloff", DLC.locreloff);
W.printNumber("nlocrel", DLC.nlocrel);
}
}
}
void MachODumper::printMachOSegment() {
for (const auto &Load : Obj->load_commands()) {
if (Load.C.cmd == MachO::LC_SEGMENT || Load.C.cmd == MachO::LC_SEGMENT_64) {
MachOSegment MOSegment;
getSegment(Obj, Load, MOSegment);
DictScope Group(W, "Segment");
W.printString("Cmd", MOSegment.CmdName);
W.printString("Name", MOSegment.SegName);
W.printNumber("Size", MOSegment.cmdsize);
W.printHex("vmaddr", MOSegment.vmaddr);
W.printHex("vmsize", MOSegment.vmsize);
W.printNumber("fileoff", MOSegment.fileoff);
W.printNumber("filesize", MOSegment.filesize);
W.printString("maxprot", getMask(MOSegment.maxprot));
W.printString("initprot", getMask(MOSegment.initprot));
W.printNumber("nsects", MOSegment.nsects);
W.printHex("flags", MOSegment.flags);
}
}
}
void MachODumper::printMachOIndirectSymbols() {
for (const auto &Load : Obj->load_commands()) {
if (Load.C.cmd == MachO::LC_DYSYMTAB) {
MachO::dysymtab_command DLC = Obj->getDysymtabLoadCommand();
DictScope Group(W, "Indirect Symbols");
W.printNumber("Number", DLC.nindirectsyms);
ListScope D(W, "Symbols");
for (unsigned i = 0; i < DLC.nindirectsyms; ++i) {
DictScope Group(W, "Entry");
W.printNumber("Entry Index", i);
W.printHex("Symbol Index", Obj->getIndirectSymbolTableEntry(DLC, i));
}
}
}
}
void MachODumper::printMachOLinkerOptions() {
for (const auto &Load : Obj->load_commands()) {
if (Load.C.cmd == MachO::LC_LINKER_OPTION) {
MachO::linker_option_command LOLC = Obj->getLinkerOptionLoadCommand(Load);
DictScope Group(W, "Linker Options");
W.printNumber("Size", LOLC.cmdsize);
ListScope D(W, "Strings");
uint64_t DataSize = LOLC.cmdsize - sizeof(MachO::linker_option_command);
const char *P = Load.Ptr + sizeof(MachO::linker_option_command);
StringRef Data(P, DataSize);
for (unsigned i = 0; i < LOLC.count; ++i) {
std::pair<StringRef,StringRef> Split = Data.split('\0');
W.printString("Value", Split.first);
Data = Split.second;
}
}
}
}
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