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macho-dump: Add support for dumping symtab and dysymtab commands.

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llvm-svn: 120204
This commit is contained in:
Daniel Dunbar 2010-11-27 08:33:44 +00:00
parent 44ac81f948
commit 38307b5ad4
4 changed files with 141 additions and 0 deletions
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41
include/llvm/Object/MachOFormat.h
View File

@ -177,6 +177,47 @@ namespace macho {
uint32_t Flags;
};
struct SymtabLoadCommand {
uint32_t Type;
uint32_t Size;
uint32_t SymbolTableOffset;
uint32_t NumSymbolTableEntries;
uint32_t StringTableOffset;
uint32_t StringTableSize;
};
struct DysymtabLoadCommand {
uint32_t Type;
uint32_t Size;
uint32_t LocalSymbolIndex;
uint32_t NumLocalSymbols;
uint32_t ExternalSymbolsIndex;
uint32_t NumExternalSymbols;
uint32_t UndefinedSymbolsIndex;
uint32_t NumUndefinedSymbols;
uint32_t TOCOffset;
uint32_t NumTOCEntries;
uint32_t ModuleTableOffset;
uint32_t NumModuleTableEntries;
uint32_t ReferenceSymbolTableOffset;
uint32_t NumReferencedSymbolTableEntries;
uint32_t IndirectSymbolTableOffset;
uint32_t NumIndirectSymbolTableEntries;
uint32_t ExternalRelocationTableOffset;
uint32_t NumExternalRelocationTableEntries;
uint32_t LocalRelocationTableOffset;
uint32_t NumLocalRelocationTableEntries;
};
/// @}
// See <mach-o/nlist.h>.

6
include/llvm/Object/MachOObject.h
View File

@ -119,6 +119,12 @@ public:
void ReadSegment64LoadCommand(
const LoadCommandInfo &LCI,
InMemoryStruct<macho::Segment64LoadCommand> &Res) const;
void ReadSymtabLoadCommand(
const LoadCommandInfo &LCI,
InMemoryStruct<macho::SymtabLoadCommand> &Res) const;
void ReadDysymtabLoadCommand(
const LoadCommandInfo &LCI,
InMemoryStruct<macho::DysymtabLoadCommand> &Res) const;
/// @}
};

42
lib/Object/MachOObject.cpp
View File

@ -188,3 +188,45 @@ void MachOObject::ReadSegment64LoadCommand(const LoadCommandInfo &LCI,
InMemoryStruct<macho::Segment64LoadCommand> &Res) const {
ReadInMemoryStruct(*this, Buffer->getBuffer(), LCI.Offset, Res);
}
template<>
static void SwapStruct(macho::SymtabLoadCommand &Value) {
SwapValue(Value.Type);
SwapValue(Value.Size);
SwapValue(Value.SymbolTableOffset);
SwapValue(Value.NumSymbolTableEntries);
SwapValue(Value.StringTableOffset);
SwapValue(Value.StringTableSize);
}
void MachOObject::ReadSymtabLoadCommand(const LoadCommandInfo &LCI,
InMemoryStruct<macho::SymtabLoadCommand> &Res) const {
ReadInMemoryStruct(*this, Buffer->getBuffer(), LCI.Offset, Res);
}
template<>
static void SwapStruct(macho::DysymtabLoadCommand &Value) {
SwapValue(Value.Type);
SwapValue(Value.Size);
SwapValue(Value.LocalSymbolIndex);
SwapValue(Value.NumLocalSymbols);
SwapValue(Value.ExternalSymbolsIndex);
SwapValue(Value.NumExternalSymbols);
SwapValue(Value.UndefinedSymbolsIndex);
SwapValue(Value.NumUndefinedSymbols);
SwapValue(Value.TOCOffset);
SwapValue(Value.NumTOCEntries);
SwapValue(Value.ModuleTableOffset);
SwapValue(Value.NumModuleTableEntries);
SwapValue(Value.ReferenceSymbolTableOffset);
SwapValue(Value.NumReferencedSymbolTableEntries);
SwapValue(Value.IndirectSymbolTableOffset);
SwapValue(Value.NumIndirectSymbolTableEntries);
SwapValue(Value.ExternalRelocationTableOffset);
SwapValue(Value.NumExternalRelocationTableEntries);
SwapValue(Value.LocalRelocationTableOffset);
SwapValue(Value.NumLocalRelocationTableEntries);
}
void MachOObject::ReadDysymtabLoadCommand(const LoadCommandInfo &LCI,
InMemoryStruct<macho::DysymtabLoadCommand> &Res) const {
ReadInMemoryStruct(*this, Buffer->getBuffer(), LCI.Offset, Res);
}

52
tools/macho-dump/macho-dump.cpp
View File

@ -111,6 +111,52 @@ static int DumpSegment64Command(MachOObject &Obj,
return 0;
}
static int DumpSymtabCommand(MachOObject &Obj,
const MachOObject::LoadCommandInfo &LCI) {
InMemoryStruct<macho::SymtabLoadCommand> SLC;
Obj.ReadSymtabLoadCommand(LCI, SLC);
if (!SLC)
return Error("unable to read segment load command");
outs() << " ('symoff', " << SLC->SymbolTableOffset << ")\n";
outs() << " ('nsyms', " << SLC->NumSymbolTableEntries << ")\n";
outs() << " ('stroff', " << SLC->StringTableOffset << ")\n";
outs() << " ('strsize', " << SLC->StringTableSize << ")\n";
return 0;
}
static int DumpDysymtabCommand(MachOObject &Obj,
const MachOObject::LoadCommandInfo &LCI) {
InMemoryStruct<macho::DysymtabLoadCommand> DLC;
Obj.ReadDysymtabLoadCommand(LCI, DLC);
if (!DLC)
return Error("unable to read segment load command");
outs() << " ('ilocalsym', " << DLC->LocalSymbolIndex << ")\n";
outs() << " ('nlocalsym', " << DLC->NumLocalSymbols << ")\n";
outs() << " ('iextdefsym', " << DLC->ExternalSymbolsIndex << ")\n";
outs() << " ('nextdefsym', " << DLC->NumExternalSymbols << ")\n";
outs() << " ('iundefsym', " << DLC->UndefinedSymbolsIndex << ")\n";
outs() << " ('nundefsym', " << DLC->NumUndefinedSymbols << ")\n";
outs() << " ('tocoff', " << DLC->TOCOffset << ")\n";
outs() << " ('ntoc', " << DLC->NumTOCEntries << ")\n";
outs() << " ('modtaboff', " << DLC->ModuleTableOffset << ")\n";
outs() << " ('nmodtab', " << DLC->NumModuleTableEntries << ")\n";
outs() << " ('extrefsymoff', " << DLC->ReferenceSymbolTableOffset << ")\n";
outs() << " ('nextrefsyms', "
<< DLC->NumReferencedSymbolTableEntries << ")\n";
outs() << " ('indirectsymoff', " << DLC->IndirectSymbolTableOffset << ")\n";
outs() << " ('nindirectsyms', "
<< DLC->NumIndirectSymbolTableEntries << ")\n";
outs() << " ('extreloff', " << DLC->ExternalRelocationTableOffset << ")\n";
outs() << " ('nextrel', " << DLC->NumExternalRelocationTableEntries << ")\n";
outs() << " ('locreloff', " << DLC->LocalRelocationTableOffset << ")\n";
outs() << " ('nlocrel', " << DLC->NumLocalRelocationTableEntries << ")\n";
return 0;
}
static int DumpLoadCommand(MachOObject &Obj, unsigned Index) {
const MachOObject::LoadCommandInfo &LCI = Obj.getLoadCommandInfo(Index);
int Res = 0;
@ -125,6 +171,12 @@ static int DumpLoadCommand(MachOObject &Obj, unsigned Index) {
case macho::LCT_Segment64:
Res = DumpSegment64Command(Obj, LCI);
break;
case macho::LCT_Symtab:
Res = DumpSymtabCommand(Obj, LCI);
break;
case macho::LCT_Dysymtab:
Res = DumpDysymtabCommand(Obj, LCI);
break;
default:
Warning("unknown load command: " + Twine(LCI.Command.Type));
break;