mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-14 11:32:34 +00:00
59b9c8879b
yesterday. This eliminates possible confusion about what exactly in this directory; the name is still short, though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95118 91177308-0d34-0410-b5e6-96231b3b80d8
387 lines
10 KiB
C++
387 lines
10 KiB
C++
//===-EDDisassembler.cpp - LLVM Enhanced Disassembler ---------------------===//
|
|
//
|
|
// 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 Enhanced Disassembly library's disassembler class.
|
|
// The disassembler is responsible for vending individual instructions according
|
|
// to a given architecture and disassembly syntax.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/OwningPtr.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/MC/MCAsmInfo.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCDisassembler.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCInst.h"
|
|
#include "llvm/MC/MCInstPrinter.h"
|
|
#include "llvm/MC/MCStreamer.h"
|
|
#include "llvm/MC/MCParser/AsmLexer.h"
|
|
#include "llvm/MC/MCParser/AsmParser.h"
|
|
#include "llvm/MC/MCParser/MCAsmParser.h"
|
|
#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/MemoryObject.h"
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "llvm/Target/TargetAsmLexer.h"
|
|
#include "llvm/Target/TargetAsmParser.h"
|
|
#include "llvm/Target/TargetRegistry.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/TargetRegisterInfo.h"
|
|
#include "llvm/Target/TargetSelect.h"
|
|
|
|
#include "EDDisassembler.h"
|
|
#include "EDInst.h"
|
|
|
|
#include "../../lib/Target/X86/X86GenEDInfo.inc"
|
|
|
|
using namespace llvm;
|
|
|
|
bool EDDisassembler::sInitialized = false;
|
|
EDDisassembler::DisassemblerMap_t EDDisassembler::sDisassemblers;
|
|
|
|
struct InfoMap {
|
|
Triple::ArchType Arch;
|
|
const char *String;
|
|
const InstInfo *Info;
|
|
};
|
|
|
|
static struct InfoMap infomap[] = {
|
|
{ Triple::x86, "i386-unknown-unknown", instInfoX86 },
|
|
{ Triple::x86_64, "x86_64-unknown-unknown", instInfoX86 },
|
|
{ Triple::InvalidArch, NULL, NULL }
|
|
};
|
|
|
|
/// infoFromArch - Returns the InfoMap corresponding to a given architecture,
|
|
/// or NULL if there is an error
|
|
///
|
|
/// @arg arch - The Triple::ArchType for the desired architecture
|
|
static const InfoMap *infoFromArch(Triple::ArchType arch) {
|
|
unsigned int infoIndex;
|
|
|
|
for (infoIndex = 0; infomap[infoIndex].String != NULL; ++infoIndex) {
|
|
if(arch == infomap[infoIndex].Arch)
|
|
return &infomap[infoIndex];
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/// getLLVMSyntaxVariant - gets the constant to use to get an assembly printer
|
|
/// for the desired assembly syntax, suitable for passing to
|
|
/// Target::createMCInstPrinter()
|
|
///
|
|
/// @arg arch - The target architecture
|
|
/// @arg syntax - The assembly syntax in sd form
|
|
static int getLLVMSyntaxVariant(Triple::ArchType arch,
|
|
EDAssemblySyntax_t syntax) {
|
|
switch (syntax) {
|
|
default:
|
|
return -1;
|
|
// Mappings below from X86AsmPrinter.cpp
|
|
case kEDAssemblySyntaxX86ATT:
|
|
if (arch == Triple::x86 || arch == Triple::x86_64)
|
|
return 0;
|
|
else
|
|
return -1;
|
|
case kEDAssemblySyntaxX86Intel:
|
|
if (arch == Triple::x86 || arch == Triple::x86_64)
|
|
return 1;
|
|
else
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
#define BRINGUP_TARGET(tgt) \
|
|
LLVMInitialize##tgt##TargetInfo(); \
|
|
LLVMInitialize##tgt##Target(); \
|
|
LLVMInitialize##tgt##AsmPrinter(); \
|
|
LLVMInitialize##tgt##AsmParser(); \
|
|
LLVMInitialize##tgt##Disassembler();
|
|
|
|
void EDDisassembler::initialize() {
|
|
if (sInitialized)
|
|
return;
|
|
|
|
sInitialized = true;
|
|
|
|
BRINGUP_TARGET(X86)
|
|
}
|
|
|
|
#undef BRINGUP_TARGET
|
|
|
|
EDDisassembler *EDDisassembler::getDisassembler(Triple::ArchType arch,
|
|
EDAssemblySyntax_t syntax) {
|
|
CPUKey key;
|
|
key.Arch = arch;
|
|
key.Syntax = syntax;
|
|
|
|
EDDisassembler::DisassemblerMap_t::iterator i = sDisassemblers.find(key);
|
|
|
|
if (i != sDisassemblers.end()) {
|
|
return i->second;
|
|
}
|
|
else {
|
|
EDDisassembler* sdd = new EDDisassembler(key);
|
|
if(!sdd->valid()) {
|
|
delete sdd;
|
|
return NULL;
|
|
}
|
|
|
|
sDisassemblers[key] = sdd;
|
|
|
|
return sdd;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
EDDisassembler *EDDisassembler::getDisassembler(StringRef str,
|
|
EDAssemblySyntax_t syntax) {
|
|
Triple triple(str);
|
|
|
|
return getDisassembler(triple.getArch(), syntax);
|
|
}
|
|
|
|
EDDisassembler::EDDisassembler(CPUKey &key) :
|
|
Valid(false), ErrorString(), ErrorStream(ErrorString), Key(key) {
|
|
const InfoMap *infoMap = infoFromArch(key.Arch);
|
|
|
|
if (!infoMap)
|
|
return;
|
|
|
|
const char *triple = infoMap->String;
|
|
|
|
int syntaxVariant = getLLVMSyntaxVariant(key.Arch, key.Syntax);
|
|
|
|
if (syntaxVariant < 0)
|
|
return;
|
|
|
|
std::string tripleString(triple);
|
|
std::string errorString;
|
|
|
|
Tgt = TargetRegistry::lookupTarget(tripleString,
|
|
errorString);
|
|
|
|
if (!Tgt)
|
|
return;
|
|
|
|
std::string featureString;
|
|
|
|
OwningPtr<const TargetMachine>
|
|
targetMachine(Tgt->createTargetMachine(tripleString,
|
|
featureString));
|
|
|
|
const TargetRegisterInfo *registerInfo = targetMachine->getRegisterInfo();
|
|
|
|
if (!registerInfo)
|
|
return;
|
|
|
|
AsmInfo.reset(Tgt->createAsmInfo(tripleString));
|
|
|
|
if (!AsmInfo)
|
|
return;
|
|
|
|
Disassembler.reset(Tgt->createMCDisassembler());
|
|
|
|
if (!Disassembler)
|
|
return;
|
|
|
|
InstString.reset(new std::string);
|
|
InstStream.reset(new raw_string_ostream(*InstString));
|
|
|
|
InstPrinter.reset(Tgt->createMCInstPrinter(syntaxVariant,
|
|
*AsmInfo,
|
|
*InstStream));
|
|
|
|
if (!InstPrinter)
|
|
return;
|
|
|
|
GenericAsmLexer.reset(new AsmLexer(*AsmInfo));
|
|
SpecificAsmLexer.reset(Tgt->createAsmLexer(*AsmInfo));
|
|
SpecificAsmLexer->InstallLexer(*GenericAsmLexer);
|
|
|
|
InstInfos = infoMap->Info;
|
|
|
|
initMaps(*targetMachine->getRegisterInfo());
|
|
|
|
Valid = true;
|
|
}
|
|
|
|
EDDisassembler::~EDDisassembler() {
|
|
if(!valid())
|
|
return;
|
|
}
|
|
|
|
namespace {
|
|
/// EDMemoryObject - a subclass of MemoryObject that allows use of a callback
|
|
/// as provided by the sd interface. See MemoryObject.
|
|
class EDMemoryObject : public llvm::MemoryObject {
|
|
private:
|
|
EDByteReaderCallback Callback;
|
|
void *Arg;
|
|
public:
|
|
EDMemoryObject(EDByteReaderCallback callback,
|
|
void *arg) : Callback(callback), Arg(arg) { }
|
|
~EDMemoryObject() { }
|
|
uint64_t getBase() const { return 0x0; }
|
|
uint64_t getExtent() const { return (uint64_t)-1; }
|
|
int readByte(uint64_t address, uint8_t *ptr) const {
|
|
if(!Callback)
|
|
return -1;
|
|
|
|
if(Callback(ptr, address, Arg))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
};
|
|
}
|
|
|
|
EDInst *EDDisassembler::createInst(EDByteReaderCallback byteReader,
|
|
uint64_t address,
|
|
void *arg) {
|
|
EDMemoryObject memoryObject(byteReader, arg);
|
|
|
|
MCInst* inst = new MCInst;
|
|
uint64_t byteSize;
|
|
|
|
if (!Disassembler->getInstruction(*inst,
|
|
byteSize,
|
|
memoryObject,
|
|
address,
|
|
ErrorStream)) {
|
|
delete inst;
|
|
return NULL;
|
|
}
|
|
else {
|
|
const InstInfo *thisInstInfo = &InstInfos[inst->getOpcode()];
|
|
|
|
EDInst* sdInst = new EDInst(inst, byteSize, *this, thisInstInfo);
|
|
return sdInst;
|
|
}
|
|
}
|
|
|
|
void EDDisassembler::initMaps(const TargetRegisterInfo ®isterInfo) {
|
|
unsigned numRegisters = registerInfo.getNumRegs();
|
|
unsigned registerIndex;
|
|
|
|
for (registerIndex = 0; registerIndex < numRegisters; ++registerIndex) {
|
|
const char* registerName = registerInfo.get(registerIndex).Name;
|
|
|
|
RegVec.push_back(registerName);
|
|
RegRMap[registerName] = registerIndex;
|
|
}
|
|
|
|
if (Key.Arch == Triple::x86 ||
|
|
Key.Arch == Triple::x86_64) {
|
|
stackPointers.insert(registerIDWithName("SP"));
|
|
stackPointers.insert(registerIDWithName("ESP"));
|
|
stackPointers.insert(registerIDWithName("RSP"));
|
|
|
|
programCounters.insert(registerIDWithName("IP"));
|
|
programCounters.insert(registerIDWithName("EIP"));
|
|
programCounters.insert(registerIDWithName("RIP"));
|
|
}
|
|
}
|
|
|
|
const char *EDDisassembler::nameWithRegisterID(unsigned registerID) const {
|
|
if (registerID >= RegVec.size())
|
|
return NULL;
|
|
else
|
|
return RegVec[registerID].c_str();
|
|
}
|
|
|
|
unsigned EDDisassembler::registerIDWithName(const char *name) const {
|
|
regrmap_t::const_iterator iter = RegRMap.find(std::string(name));
|
|
if (iter == RegRMap.end())
|
|
return 0;
|
|
else
|
|
return (*iter).second;
|
|
}
|
|
|
|
bool EDDisassembler::registerIsStackPointer(unsigned registerID) {
|
|
return (stackPointers.find(registerID) != stackPointers.end());
|
|
}
|
|
|
|
bool EDDisassembler::registerIsProgramCounter(unsigned registerID) {
|
|
return (programCounters.find(registerID) != programCounters.end());
|
|
}
|
|
|
|
int EDDisassembler::printInst(std::string& str,
|
|
MCInst& inst) {
|
|
PrinterMutex.acquire();
|
|
|
|
InstPrinter->printInst(&inst);
|
|
InstStream->flush();
|
|
str = *InstString;
|
|
InstString->clear();
|
|
|
|
PrinterMutex.release();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int EDDisassembler::parseInst(SmallVectorImpl<MCParsedAsmOperand*> &operands,
|
|
SmallVectorImpl<AsmToken> &tokens,
|
|
const std::string &str) {
|
|
int ret = 0;
|
|
|
|
const char *cStr = str.c_str();
|
|
MemoryBuffer *buf = MemoryBuffer::getMemBuffer(cStr, cStr + strlen(cStr));
|
|
|
|
StringRef instName;
|
|
SMLoc instLoc;
|
|
|
|
SourceMgr sourceMgr;
|
|
sourceMgr.AddNewSourceBuffer(buf, SMLoc()); // ownership of buf handed over
|
|
MCContext context;
|
|
OwningPtr<MCStreamer> streamer
|
|
(createNullStreamer(context));
|
|
AsmParser genericParser(sourceMgr, context, *streamer, *AsmInfo);
|
|
OwningPtr<TargetAsmParser> specificParser
|
|
(Tgt->createAsmParser(genericParser));
|
|
|
|
AsmToken OpcodeToken = genericParser.Lex();
|
|
|
|
if(OpcodeToken.is(AsmToken::Identifier)) {
|
|
instName = OpcodeToken.getString();
|
|
instLoc = OpcodeToken.getLoc();
|
|
if (specificParser->ParseInstruction(instName, instLoc, operands))
|
|
ret = -1;
|
|
}
|
|
else {
|
|
ret = -1;
|
|
}
|
|
|
|
ParserMutex.acquire();
|
|
|
|
if (!ret) {
|
|
GenericAsmLexer->setBuffer(buf);
|
|
|
|
while (SpecificAsmLexer->Lex(),
|
|
SpecificAsmLexer->isNot(AsmToken::Eof) &&
|
|
SpecificAsmLexer->isNot(AsmToken::EndOfStatement)) {
|
|
if (SpecificAsmLexer->is(AsmToken::Error)) {
|
|
ret = -1;
|
|
break;
|
|
}
|
|
tokens.push_back(SpecificAsmLexer->getTok());
|
|
}
|
|
}
|
|
|
|
ParserMutex.release();
|
|
|
|
return ret;
|
|
}
|
|
|
|
int EDDisassembler::llvmSyntaxVariant() const {
|
|
return LLVMSyntaxVariant;
|
|
}
|