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//===- ARMDisassembler.h - Disassembler for ARM/Thumb ISA -------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is part of the ARM Disassembler.
// It contains the header for ARMDisassembler and ThumbDisassembler, both are
// subclasses of MCDisassembler.
//
//===----------------------------------------------------------------------===//
#ifndef ARMDISASSEMBLER_H
#define ARMDISASSEMBLER_H
#include "llvm/MC/MCDisassembler.h"
namespace llvm {
class MCInst;
class MemoryObject;
class raw_ostream;
struct EDInstInfo;
/// ARMDisassembler - ARM disassembler for all ARM platforms.
class ARMDisassembler : public MCDisassembler {
public:
/// Constructor - Initializes the disassembler.
///
ARMDisassembler() :
MCDisassembler() {
}
~ARMDisassembler() {
}
/// getInstruction - See MCDisassembler.
bool getInstruction(MCInst &instr,
uint64_t &size,
const MemoryObject ®ion,
uint64_t address,
raw_ostream &vStream) const;
/// getEDInfo - See MCDisassembler.
EDInstInfo *getEDInfo() const;
private:
};
// Forward declaration.
class ARMBasicMCBuilder;
/// Session - Keep track of the IT Block progression.
class Session {
friend class ARMBasicMCBuilder;
public:
Session() : ITCounter(0), ITState(0) {}
~Session() {}
/// InitIT - Initializes ITCounter/ITState.
bool InitIT(unsigned short bits7_0);
/// UpdateIT - Updates ITCounter/ITState as IT Block progresses.
void UpdateIT();
private:
unsigned ITCounter; // Possible values: 0, 1, 2, 3, 4.
unsigned ITState; // A2.5.2 Consists of IT[7:5] and IT[4:0] initially.
};
/// ThumbDisassembler - Thumb disassembler for all ARM platforms.
class ThumbDisassembler : public MCDisassembler {
public:
/// Constructor - Initializes the disassembler.
///
ThumbDisassembler() :
MCDisassembler(), SO() {
}
~ThumbDisassembler() {
}
/// getInstruction - See MCDisassembler.
bool getInstruction(MCInst &instr,
uint64_t &size,
const MemoryObject ®ion,
uint64_t address,
raw_ostream &vStream) const;
/// getEDInfo - See MCDisassembler.
EDInstInfo *getEDInfo() const;
private:
Session SO;
};
} // namespace llvm
#endif
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