mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-01 16:33:37 +01:00
328 lines
10 KiB
C++
328 lines
10 KiB
C++
//===- MachOObjectFile.cpp - Mach-O object file binding ---------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the MachOObjectFile class, which binds the MachOObject
|
|
// class to the generic ObjectFile wrapper.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/Triple.h"
|
|
#include "llvm/Object/MachOFormat.h"
|
|
#include "llvm/Object/MachOObject.h"
|
|
#include "llvm/Object/ObjectFile.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/MachO.h"
|
|
|
|
#include <cctype>
|
|
#include <cstring>
|
|
#include <limits>
|
|
|
|
using namespace llvm;
|
|
using namespace object;
|
|
|
|
namespace llvm {
|
|
|
|
typedef MachOObject::LoadCommandInfo LoadCommandInfo;
|
|
|
|
class MachOObjectFile : public ObjectFile {
|
|
public:
|
|
MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO)
|
|
: ObjectFile(Object),
|
|
MachOObj(MOO),
|
|
RegisteredStringTable(std::numeric_limits<uint32_t>::max()) {}
|
|
|
|
virtual symbol_iterator begin_symbols() const;
|
|
virtual symbol_iterator end_symbols() const;
|
|
virtual section_iterator begin_sections() const;
|
|
virtual section_iterator end_sections() const;
|
|
|
|
virtual uint8_t getBytesInAddress() const;
|
|
virtual StringRef getFileFormatName() const;
|
|
virtual unsigned getArch() const;
|
|
|
|
protected:
|
|
virtual SymbolRef getSymbolNext(DataRefImpl Symb) const;
|
|
virtual StringRef getSymbolName(DataRefImpl Symb) const;
|
|
virtual uint64_t getSymbolAddress(DataRefImpl Symb) const;
|
|
virtual uint64_t getSymbolSize(DataRefImpl Symb) const;
|
|
virtual char getSymbolNMTypeChar(DataRefImpl Symb) const;
|
|
virtual bool isSymbolInternal(DataRefImpl Symb) const;
|
|
|
|
virtual SectionRef getSectionNext(DataRefImpl Sec) const;
|
|
virtual StringRef getSectionName(DataRefImpl Sec) const;
|
|
virtual uint64_t getSectionAddress(DataRefImpl Sec) const;
|
|
virtual uint64_t getSectionSize(DataRefImpl Sec) const;
|
|
virtual StringRef getSectionContents(DataRefImpl Sec) const;
|
|
virtual bool isSectionText(DataRefImpl Sec) const;
|
|
|
|
private:
|
|
MachOObject *MachOObj;
|
|
mutable uint32_t RegisteredStringTable;
|
|
|
|
void moveToNextSection(DataRefImpl &DRI) const;
|
|
void getSymbolTableEntry(DataRefImpl DRI,
|
|
InMemoryStruct<macho::SymbolTableEntry> &Res) const;
|
|
void moveToNextSymbol(DataRefImpl &DRI) const;
|
|
void getSection(DataRefImpl DRI, InMemoryStruct<macho::Section> &Res) const;
|
|
};
|
|
|
|
ObjectFile *ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer) {
|
|
std::string Err;
|
|
MachOObject *MachOObj = MachOObject::LoadFromBuffer(Buffer, &Err);
|
|
if (!MachOObj)
|
|
return NULL;
|
|
return new MachOObjectFile(Buffer, MachOObj);
|
|
}
|
|
|
|
/*===-- Symbols -----------------------------------------------------------===*/
|
|
|
|
void MachOObjectFile::moveToNextSymbol(DataRefImpl &DRI) const {
|
|
uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
|
|
while (DRI.d.a < LoadCommandCount) {
|
|
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
|
|
if (LCI.Command.Type == macho::LCT_Symtab) {
|
|
InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
|
|
MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
|
|
if (DRI.d.b < SymtabLoadCmd->NumSymbolTableEntries)
|
|
return;
|
|
}
|
|
|
|
DRI.d.a++;
|
|
DRI.d.b = 0;
|
|
}
|
|
}
|
|
|
|
void MachOObjectFile::getSymbolTableEntry(DataRefImpl DRI,
|
|
InMemoryStruct<macho::SymbolTableEntry> &Res) const {
|
|
InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
|
|
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
|
|
MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
|
|
|
|
if (RegisteredStringTable != DRI.d.a) {
|
|
MachOObj->RegisterStringTable(*SymtabLoadCmd);
|
|
RegisteredStringTable = DRI.d.a;
|
|
}
|
|
|
|
MachOObj->ReadSymbolTableEntry(SymtabLoadCmd->SymbolTableOffset, DRI.d.b,
|
|
Res);
|
|
}
|
|
|
|
|
|
SymbolRef MachOObjectFile::getSymbolNext(DataRefImpl DRI) const {
|
|
DRI.d.b++;
|
|
moveToNextSymbol(DRI);
|
|
return SymbolRef(DRI, this);
|
|
}
|
|
|
|
StringRef MachOObjectFile::getSymbolName(DataRefImpl DRI) const {
|
|
InMemoryStruct<macho::SymbolTableEntry> Entry;
|
|
getSymbolTableEntry(DRI, Entry);
|
|
return MachOObj->getStringAtIndex(Entry->StringIndex);
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSymbolAddress(DataRefImpl DRI) const {
|
|
InMemoryStruct<macho::SymbolTableEntry> Entry;
|
|
getSymbolTableEntry(DRI, Entry);
|
|
return Entry->Value;
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSymbolSize(DataRefImpl DRI) const {
|
|
return UnknownAddressOrSize;
|
|
}
|
|
|
|
char MachOObjectFile::getSymbolNMTypeChar(DataRefImpl DRI) const {
|
|
InMemoryStruct<macho::SymbolTableEntry> Entry;
|
|
getSymbolTableEntry(DRI, Entry);
|
|
|
|
char Char;
|
|
switch (Entry->Type & macho::STF_TypeMask) {
|
|
case macho::STT_Undefined:
|
|
Char = 'u';
|
|
break;
|
|
case macho::STT_Absolute:
|
|
case macho::STT_Section:
|
|
Char = 's';
|
|
break;
|
|
default:
|
|
Char = '?';
|
|
break;
|
|
}
|
|
|
|
if (Entry->Flags & (macho::STF_External | macho::STF_PrivateExtern))
|
|
Char = toupper(Char);
|
|
return Char;
|
|
}
|
|
|
|
bool MachOObjectFile::isSymbolInternal(DataRefImpl DRI) const {
|
|
InMemoryStruct<macho::SymbolTableEntry> Entry;
|
|
getSymbolTableEntry(DRI, Entry);
|
|
return Entry->Flags & macho::STF_StabsEntryMask;
|
|
}
|
|
|
|
ObjectFile::symbol_iterator MachOObjectFile::begin_symbols() const {
|
|
// DRI.d.a = segment number; DRI.d.b = symbol index.
|
|
DataRefImpl DRI;
|
|
DRI.d.a = DRI.d.b = 0;
|
|
moveToNextSymbol(DRI);
|
|
return symbol_iterator(SymbolRef(DRI, this));
|
|
}
|
|
|
|
ObjectFile::symbol_iterator MachOObjectFile::end_symbols() const {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = MachOObj->getHeader().NumLoadCommands;
|
|
DRI.d.b = 0;
|
|
return symbol_iterator(SymbolRef(DRI, this));
|
|
}
|
|
|
|
|
|
/*===-- Sections ----------------------------------------------------------===*/
|
|
|
|
void MachOObjectFile::moveToNextSection(DataRefImpl &DRI) const {
|
|
uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
|
|
while (DRI.d.a < LoadCommandCount) {
|
|
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
|
|
if (LCI.Command.Type == macho::LCT_Segment) {
|
|
InMemoryStruct<macho::SegmentLoadCommand> SegmentLoadCmd;
|
|
MachOObj->ReadSegmentLoadCommand(LCI, SegmentLoadCmd);
|
|
if (DRI.d.b < SegmentLoadCmd->NumSections)
|
|
return;
|
|
} else if (LCI.Command.Type == macho::LCT_Segment64) {
|
|
InMemoryStruct<macho::Segment64LoadCommand> Segment64LoadCmd;
|
|
MachOObj->ReadSegment64LoadCommand(LCI, Segment64LoadCmd);
|
|
if (DRI.d.b < Segment64LoadCmd->NumSections)
|
|
return;
|
|
}
|
|
|
|
DRI.d.a++;
|
|
DRI.d.b = 0;
|
|
}
|
|
}
|
|
|
|
SectionRef MachOObjectFile::getSectionNext(DataRefImpl DRI) const {
|
|
DRI.d.b++;
|
|
moveToNextSection(DRI);
|
|
return SectionRef(DRI, this);
|
|
}
|
|
|
|
void
|
|
MachOObjectFile::getSection(DataRefImpl DRI,
|
|
InMemoryStruct<macho::Section> &Res) const {
|
|
InMemoryStruct<macho::SegmentLoadCommand> SLC;
|
|
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
|
|
MachOObj->ReadSegmentLoadCommand(LCI, SLC);
|
|
MachOObj->ReadSection(LCI, DRI.d.b, Res);
|
|
}
|
|
|
|
StringRef MachOObjectFile::getSectionName(DataRefImpl DRI) const {
|
|
InMemoryStruct<macho::SegmentLoadCommand> SLC;
|
|
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
|
|
MachOObj->ReadSegmentLoadCommand(LCI, SLC);
|
|
InMemoryStruct<macho::Section> Sect;
|
|
MachOObj->ReadSection(LCI, DRI.d.b, Sect);
|
|
|
|
static char Result[34];
|
|
strcpy(Result, SLC->Name);
|
|
strcat(Result, ",");
|
|
strcat(Result, Sect->Name);
|
|
return StringRef(Result);
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSectionAddress(DataRefImpl DRI) const {
|
|
InMemoryStruct<macho::Section> Sect;
|
|
getSection(DRI, Sect);
|
|
return Sect->Address;
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSectionSize(DataRefImpl DRI) const {
|
|
InMemoryStruct<macho::Section> Sect;
|
|
getSection(DRI, Sect);
|
|
return Sect->Size;
|
|
}
|
|
|
|
StringRef MachOObjectFile::getSectionContents(DataRefImpl DRI) const {
|
|
InMemoryStruct<macho::Section> Sect;
|
|
getSection(DRI, Sect);
|
|
return MachOObj->getData(Sect->Offset, Sect->Size);
|
|
}
|
|
|
|
bool MachOObjectFile::isSectionText(DataRefImpl DRI) const {
|
|
InMemoryStruct<macho::SegmentLoadCommand> SLC;
|
|
LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
|
|
MachOObj->ReadSegmentLoadCommand(LCI, SLC);
|
|
return !strcmp(SLC->Name, "__TEXT");
|
|
}
|
|
|
|
ObjectFile::section_iterator MachOObjectFile::begin_sections() const {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = DRI.d.b = 0;
|
|
moveToNextSection(DRI);
|
|
return section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
ObjectFile::section_iterator MachOObjectFile::end_sections() const {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = MachOObj->getHeader().NumLoadCommands;
|
|
DRI.d.b = 0;
|
|
return section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
/*===-- Miscellaneous -----------------------------------------------------===*/
|
|
|
|
uint8_t MachOObjectFile::getBytesInAddress() const {
|
|
return MachOObj->is64Bit() ? 8 : 4;
|
|
}
|
|
|
|
StringRef MachOObjectFile::getFileFormatName() const {
|
|
if (!MachOObj->is64Bit()) {
|
|
switch (MachOObj->getHeader().CPUType) {
|
|
case llvm::MachO::CPUTypeI386:
|
|
return "Mach-O 32-bit i386";
|
|
case llvm::MachO::CPUTypeARM:
|
|
return "Mach-O arm";
|
|
case llvm::MachO::CPUTypePowerPC:
|
|
return "Mach-O 32-bit ppc";
|
|
default:
|
|
assert((MachOObj->getHeader().CPUType & llvm::MachO::CPUArchABI64) == 0 &&
|
|
"64-bit object file when we're not 64-bit?");
|
|
return "Mach-O 32-bit unknown";
|
|
}
|
|
}
|
|
|
|
switch (MachOObj->getHeader().CPUType) {
|
|
case llvm::MachO::CPUTypeX86_64:
|
|
return "Mach-O 64-bit x86-64";
|
|
case llvm::MachO::CPUTypePowerPC64:
|
|
return "Mach-O 64-bit ppc64";
|
|
default:
|
|
assert((MachOObj->getHeader().CPUType & llvm::MachO::CPUArchABI64) == 1 &&
|
|
"32-bit object file when we're 64-bit?");
|
|
return "Mach-O 64-bit unknown";
|
|
}
|
|
}
|
|
|
|
unsigned MachOObjectFile::getArch() const {
|
|
switch (MachOObj->getHeader().CPUType) {
|
|
case llvm::MachO::CPUTypeI386:
|
|
return Triple::x86;
|
|
case llvm::MachO::CPUTypeX86_64:
|
|
return Triple::x86_64;
|
|
case llvm::MachO::CPUTypeARM:
|
|
return Triple::arm;
|
|
case llvm::MachO::CPUTypePowerPC:
|
|
return Triple::ppc;
|
|
case llvm::MachO::CPUTypePowerPC64:
|
|
return Triple::ppc64;
|
|
default:
|
|
return Triple::UnknownArch;
|
|
}
|
|
}
|
|
|
|
} // end namespace llvm
|
|
|