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//===-- HexagonDisassembler.cpp - Disassembler for Hexagon ISA ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "MCTargetDesc/HexagonBaseInfo.h"
#include "MCTargetDesc/HexagonMCTargetDesc.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCFixedLenDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/LEB128.h"
#include "llvm/Support/MemoryObject.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/Endian.h"
#include <vector>
#include <array>
using namespace llvm;
#define DEBUG_TYPE "hexagon-disassembler"
// Pull DecodeStatus and its enum values into the global namespace.
typedef llvm::MCDisassembler::DecodeStatus DecodeStatus;
namespace {
/// \brief Hexagon disassembler for all Hexagon platforms.
class HexagonDisassembler : public MCDisassembler {
public:
HexagonDisassembler(MCSubtargetInfo const &STI, MCContext &Ctx)
: MCDisassembler(STI, Ctx) {}
DecodeStatus getInstruction(MCInst &instr, uint64_t &size,
MemoryObject const ®ion, uint64_t address,
raw_ostream &vStream, raw_ostream &cStream) const override;
};
}
#include "HexagonGenDisassemblerTables.inc"
static MCDisassembler *createHexagonDisassembler(Target const &T,
MCSubtargetInfo const &STI,
MCContext &Ctx) {
return new HexagonDisassembler(STI, Ctx);
}
extern "C" void LLVMInitializeHexagonDisassembler() {
TargetRegistry::RegisterMCDisassembler(TheHexagonTarget,
createHexagonDisassembler);
}
DecodeStatus HexagonDisassembler::getInstruction(MCInst &MI, uint64_t &Size,
MemoryObject const &Region,
uint64_t Address,
raw_ostream &os,
raw_ostream &cs) const {
std::array<uint8_t, 4> Bytes;
Size = 4;
if (Region.readBytes(Address, Bytes.size(), Bytes.data()) == -1) {
return MCDisassembler::Fail;
}
uint32_t insn =
llvm::support::endian::read<uint32_t, llvm::support::little,
llvm::support::unaligned>(Bytes.data());
// Remove parse bits.
insn &= ~static_cast<uint32_t>(HexagonII::InstParseBits::INST_PARSE_MASK);
return decodeInstruction(DecoderTable32, MI, insn, Address, this, STI);
}
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