mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-18 10:31:57 +00:00
d04a8d4b33
Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
411 lines
13 KiB
C++
411 lines
13 KiB
C++
//===- MachOObject.cpp - Mach-O Object File Wrapper -----------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Object/MachOObject.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/Support/DataExtractor.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/Host.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/SwapByteOrder.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::object;
|
|
|
|
/* Translation Utilities */
|
|
|
|
template<typename T>
|
|
static void SwapValue(T &Value) {
|
|
Value = sys::SwapByteOrder(Value);
|
|
}
|
|
|
|
template<typename T>
|
|
static void SwapStruct(T &Value);
|
|
|
|
template<typename T>
|
|
static void ReadInMemoryStruct(const MachOObject &MOO,
|
|
StringRef Buffer, uint64_t Base,
|
|
InMemoryStruct<T> &Res) {
|
|
typedef T struct_type;
|
|
uint64_t Size = sizeof(struct_type);
|
|
|
|
// Check that the buffer contains the expected data.
|
|
if (Base + Size > Buffer.size()) {
|
|
Res = 0;
|
|
return;
|
|
}
|
|
|
|
// Check whether we can return a direct pointer.
|
|
struct_type *Ptr = (struct_type *) (Buffer.data() + Base);
|
|
if (!MOO.isSwappedEndian()) {
|
|
Res = Ptr;
|
|
return;
|
|
}
|
|
|
|
// Otherwise, copy the struct and translate the values.
|
|
Res = *Ptr;
|
|
SwapStruct(*Res);
|
|
}
|
|
|
|
/* *** */
|
|
|
|
MachOObject::MachOObject(MemoryBuffer *Buffer_, bool IsLittleEndian_,
|
|
bool Is64Bit_)
|
|
: Buffer(Buffer_), IsLittleEndian(IsLittleEndian_), Is64Bit(Is64Bit_),
|
|
IsSwappedEndian(IsLittleEndian != sys::isLittleEndianHost()),
|
|
HasStringTable(false), LoadCommands(0), NumLoadedCommands(0) {
|
|
// Load the common header.
|
|
memcpy(&Header, Buffer->getBuffer().data(), sizeof(Header));
|
|
if (IsSwappedEndian) {
|
|
SwapValue(Header.Magic);
|
|
SwapValue(Header.CPUType);
|
|
SwapValue(Header.CPUSubtype);
|
|
SwapValue(Header.FileType);
|
|
SwapValue(Header.NumLoadCommands);
|
|
SwapValue(Header.SizeOfLoadCommands);
|
|
SwapValue(Header.Flags);
|
|
}
|
|
|
|
if (is64Bit()) {
|
|
memcpy(&Header64Ext, Buffer->getBuffer().data() + sizeof(Header),
|
|
sizeof(Header64Ext));
|
|
if (IsSwappedEndian) {
|
|
SwapValue(Header64Ext.Reserved);
|
|
}
|
|
}
|
|
|
|
// Create the load command array if sane.
|
|
if (getHeader().NumLoadCommands < (1 << 20))
|
|
LoadCommands = new LoadCommandInfo[getHeader().NumLoadCommands];
|
|
}
|
|
|
|
MachOObject::~MachOObject() {
|
|
delete [] LoadCommands;
|
|
}
|
|
|
|
MachOObject *MachOObject::LoadFromBuffer(MemoryBuffer *Buffer,
|
|
std::string *ErrorStr) {
|
|
// First, check the magic value and initialize the basic object info.
|
|
bool IsLittleEndian = false, Is64Bit = false;
|
|
StringRef Magic = Buffer->getBuffer().slice(0, 4);
|
|
if (Magic == "\xFE\xED\xFA\xCE") {
|
|
} else if (Magic == "\xCE\xFA\xED\xFE") {
|
|
IsLittleEndian = true;
|
|
} else if (Magic == "\xFE\xED\xFA\xCF") {
|
|
Is64Bit = true;
|
|
} else if (Magic == "\xCF\xFA\xED\xFE") {
|
|
IsLittleEndian = true;
|
|
Is64Bit = true;
|
|
} else {
|
|
if (ErrorStr) *ErrorStr = "not a Mach object file (invalid magic)";
|
|
return 0;
|
|
}
|
|
|
|
// Ensure that the at least the full header is present.
|
|
unsigned HeaderSize = Is64Bit ? macho::Header64Size : macho::Header32Size;
|
|
if (Buffer->getBufferSize() < HeaderSize) {
|
|
if (ErrorStr) *ErrorStr = "not a Mach object file (invalid header)";
|
|
return 0;
|
|
}
|
|
|
|
OwningPtr<MachOObject> Object(new MachOObject(Buffer, IsLittleEndian,
|
|
Is64Bit));
|
|
|
|
// Check for bogus number of load commands.
|
|
if (Object->getHeader().NumLoadCommands >= (1 << 20)) {
|
|
if (ErrorStr) *ErrorStr = "not a Mach object file (unreasonable header)";
|
|
return 0;
|
|
}
|
|
|
|
if (ErrorStr) *ErrorStr = "";
|
|
return Object.take();
|
|
}
|
|
|
|
StringRef MachOObject::getData(size_t Offset, size_t Size) const {
|
|
return Buffer->getBuffer().substr(Offset,Size);
|
|
}
|
|
|
|
void MachOObject::RegisterStringTable(macho::SymtabLoadCommand &SLC) {
|
|
HasStringTable = true;
|
|
StringTable = Buffer->getBuffer().substr(SLC.StringTableOffset,
|
|
SLC.StringTableSize);
|
|
}
|
|
|
|
const MachOObject::LoadCommandInfo &
|
|
MachOObject::getLoadCommandInfo(unsigned Index) const {
|
|
assert(Index < getHeader().NumLoadCommands && "Invalid index!");
|
|
|
|
// Load the command, if necessary.
|
|
if (Index >= NumLoadedCommands) {
|
|
uint64_t Offset;
|
|
if (Index == 0) {
|
|
Offset = getHeaderSize();
|
|
} else {
|
|
const LoadCommandInfo &Prev = getLoadCommandInfo(Index - 1);
|
|
Offset = Prev.Offset + Prev.Command.Size;
|
|
}
|
|
|
|
LoadCommandInfo &Info = LoadCommands[Index];
|
|
memcpy(&Info.Command, Buffer->getBuffer().data() + Offset,
|
|
sizeof(macho::LoadCommand));
|
|
if (IsSwappedEndian) {
|
|
SwapValue(Info.Command.Type);
|
|
SwapValue(Info.Command.Size);
|
|
}
|
|
Info.Offset = Offset;
|
|
NumLoadedCommands = Index + 1;
|
|
}
|
|
|
|
return LoadCommands[Index];
|
|
}
|
|
|
|
template<>
|
|
void SwapStruct(macho::SegmentLoadCommand &Value) {
|
|
SwapValue(Value.Type);
|
|
SwapValue(Value.Size);
|
|
SwapValue(Value.VMAddress);
|
|
SwapValue(Value.VMSize);
|
|
SwapValue(Value.FileOffset);
|
|
SwapValue(Value.FileSize);
|
|
SwapValue(Value.MaxVMProtection);
|
|
SwapValue(Value.InitialVMProtection);
|
|
SwapValue(Value.NumSections);
|
|
SwapValue(Value.Flags);
|
|
}
|
|
void MachOObject::ReadSegmentLoadCommand(const LoadCommandInfo &LCI,
|
|
InMemoryStruct<macho::SegmentLoadCommand> &Res) const {
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), LCI.Offset, Res);
|
|
}
|
|
|
|
template<>
|
|
void SwapStruct(macho::Segment64LoadCommand &Value) {
|
|
SwapValue(Value.Type);
|
|
SwapValue(Value.Size);
|
|
SwapValue(Value.VMAddress);
|
|
SwapValue(Value.VMSize);
|
|
SwapValue(Value.FileOffset);
|
|
SwapValue(Value.FileSize);
|
|
SwapValue(Value.MaxVMProtection);
|
|
SwapValue(Value.InitialVMProtection);
|
|
SwapValue(Value.NumSections);
|
|
SwapValue(Value.Flags);
|
|
}
|
|
void MachOObject::ReadSegment64LoadCommand(const LoadCommandInfo &LCI,
|
|
InMemoryStruct<macho::Segment64LoadCommand> &Res) const {
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), LCI.Offset, Res);
|
|
}
|
|
|
|
template<>
|
|
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<>
|
|
void SwapStruct(macho::DysymtabLoadCommand &Value) {
|
|
SwapValue(Value.Type);
|
|
SwapValue(Value.Size);
|
|
SwapValue(Value.LocalSymbolsIndex);
|
|
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);
|
|
}
|
|
|
|
template<>
|
|
void SwapStruct(macho::LinkeditDataLoadCommand &Value) {
|
|
SwapValue(Value.Type);
|
|
SwapValue(Value.Size);
|
|
SwapValue(Value.DataOffset);
|
|
SwapValue(Value.DataSize);
|
|
}
|
|
void MachOObject::ReadLinkeditDataLoadCommand(const LoadCommandInfo &LCI,
|
|
InMemoryStruct<macho::LinkeditDataLoadCommand> &Res) const {
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), LCI.Offset, Res);
|
|
}
|
|
|
|
template<>
|
|
void SwapStruct(macho::IndirectSymbolTableEntry &Value) {
|
|
SwapValue(Value.Index);
|
|
}
|
|
void
|
|
MachOObject::ReadIndirectSymbolTableEntry(const macho::DysymtabLoadCommand &DLC,
|
|
unsigned Index,
|
|
InMemoryStruct<macho::IndirectSymbolTableEntry> &Res) const {
|
|
uint64_t Offset = (DLC.IndirectSymbolTableOffset +
|
|
Index * sizeof(macho::IndirectSymbolTableEntry));
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
|
|
}
|
|
|
|
|
|
template<>
|
|
void SwapStruct(macho::Section &Value) {
|
|
SwapValue(Value.Address);
|
|
SwapValue(Value.Size);
|
|
SwapValue(Value.Offset);
|
|
SwapValue(Value.Align);
|
|
SwapValue(Value.RelocationTableOffset);
|
|
SwapValue(Value.NumRelocationTableEntries);
|
|
SwapValue(Value.Flags);
|
|
SwapValue(Value.Reserved1);
|
|
SwapValue(Value.Reserved2);
|
|
}
|
|
void MachOObject::ReadSection(const LoadCommandInfo &LCI,
|
|
unsigned Index,
|
|
InMemoryStruct<macho::Section> &Res) const {
|
|
assert(LCI.Command.Type == macho::LCT_Segment &&
|
|
"Unexpected load command info!");
|
|
uint64_t Offset = (LCI.Offset + sizeof(macho::SegmentLoadCommand) +
|
|
Index * sizeof(macho::Section));
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
|
|
}
|
|
|
|
template<>
|
|
void SwapStruct(macho::Section64 &Value) {
|
|
SwapValue(Value.Address);
|
|
SwapValue(Value.Size);
|
|
SwapValue(Value.Offset);
|
|
SwapValue(Value.Align);
|
|
SwapValue(Value.RelocationTableOffset);
|
|
SwapValue(Value.NumRelocationTableEntries);
|
|
SwapValue(Value.Flags);
|
|
SwapValue(Value.Reserved1);
|
|
SwapValue(Value.Reserved2);
|
|
SwapValue(Value.Reserved3);
|
|
}
|
|
void MachOObject::ReadSection64(const LoadCommandInfo &LCI,
|
|
unsigned Index,
|
|
InMemoryStruct<macho::Section64> &Res) const {
|
|
assert(LCI.Command.Type == macho::LCT_Segment64 &&
|
|
"Unexpected load command info!");
|
|
uint64_t Offset = (LCI.Offset + sizeof(macho::Segment64LoadCommand) +
|
|
Index * sizeof(macho::Section64));
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
|
|
}
|
|
|
|
template<>
|
|
void SwapStruct(macho::RelocationEntry &Value) {
|
|
SwapValue(Value.Word0);
|
|
SwapValue(Value.Word1);
|
|
}
|
|
void MachOObject::ReadRelocationEntry(uint64_t RelocationTableOffset,
|
|
unsigned Index,
|
|
InMemoryStruct<macho::RelocationEntry> &Res) const {
|
|
uint64_t Offset = (RelocationTableOffset +
|
|
Index * sizeof(macho::RelocationEntry));
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
|
|
}
|
|
|
|
template<>
|
|
void SwapStruct(macho::SymbolTableEntry &Value) {
|
|
SwapValue(Value.StringIndex);
|
|
SwapValue(Value.Flags);
|
|
SwapValue(Value.Value);
|
|
}
|
|
void MachOObject::ReadSymbolTableEntry(uint64_t SymbolTableOffset,
|
|
unsigned Index,
|
|
InMemoryStruct<macho::SymbolTableEntry> &Res) const {
|
|
uint64_t Offset = (SymbolTableOffset +
|
|
Index * sizeof(macho::SymbolTableEntry));
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
|
|
}
|
|
|
|
template<>
|
|
void SwapStruct(macho::Symbol64TableEntry &Value) {
|
|
SwapValue(Value.StringIndex);
|
|
SwapValue(Value.Flags);
|
|
SwapValue(Value.Value);
|
|
}
|
|
void MachOObject::ReadSymbol64TableEntry(uint64_t SymbolTableOffset,
|
|
unsigned Index,
|
|
InMemoryStruct<macho::Symbol64TableEntry> &Res) const {
|
|
uint64_t Offset = (SymbolTableOffset +
|
|
Index * sizeof(macho::Symbol64TableEntry));
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
|
|
}
|
|
|
|
template<>
|
|
void SwapStruct(macho::DataInCodeTableEntry &Value) {
|
|
SwapValue(Value.Offset);
|
|
SwapValue(Value.Length);
|
|
SwapValue(Value.Kind);
|
|
}
|
|
void MachOObject::ReadDataInCodeTableEntry(uint64_t TableOffset,
|
|
unsigned Index,
|
|
InMemoryStruct<macho::DataInCodeTableEntry> &Res) const {
|
|
uint64_t Offset = (TableOffset +
|
|
Index * sizeof(macho::DataInCodeTableEntry));
|
|
ReadInMemoryStruct(*this, Buffer->getBuffer(), Offset, Res);
|
|
}
|
|
|
|
void MachOObject::ReadULEB128s(uint64_t Index,
|
|
SmallVectorImpl<uint64_t> &Out) const {
|
|
DataExtractor extractor(Buffer->getBuffer(), true, 0);
|
|
|
|
uint32_t offset = Index;
|
|
uint64_t data = 0;
|
|
while (uint64_t delta = extractor.getULEB128(&offset)) {
|
|
data += delta;
|
|
Out.push_back(data);
|
|
}
|
|
}
|
|
|
|
/* ** */
|
|
// Object Dumping Facilities
|
|
void MachOObject::dump() const { print(dbgs()); dbgs() << '\n'; }
|
|
void MachOObject::dumpHeader() const { printHeader(dbgs()); dbgs() << '\n'; }
|
|
|
|
void MachOObject::printHeader(raw_ostream &O) const {
|
|
O << "('cputype', " << Header.CPUType << ")\n";
|
|
O << "('cpusubtype', " << Header.CPUSubtype << ")\n";
|
|
O << "('filetype', " << Header.FileType << ")\n";
|
|
O << "('num_load_commands', " << Header.NumLoadCommands << ")\n";
|
|
O << "('load_commands_size', " << Header.SizeOfLoadCommands << ")\n";
|
|
O << "('flag', " << Header.Flags << ")\n";
|
|
|
|
// Print extended header if 64-bit.
|
|
if (is64Bit())
|
|
O << "('reserved', " << Header64Ext.Reserved << ")\n";
|
|
}
|
|
|
|
void MachOObject::print(raw_ostream &O) const {
|
|
O << "Header:\n";
|
|
printHeader(O);
|
|
O << "Load Commands:\n";
|
|
|
|
O << "Buffer:\n";
|
|
}
|