mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-10-17 03:26:03 +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
554 lines
20 KiB
C++
554 lines
20 KiB
C++
//===- MipsDisassembler.cpp - Disassembler for Mips -------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is part of the Mips Disassembler.
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//
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//===----------------------------------------------------------------------===//
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#include "Mips.h"
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#include "MipsRegisterInfo.h"
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#include "MipsSubtarget.h"
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#include "llvm/MC/EDInstInfo.h"
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#include "llvm/MC/MCDisassembler.h"
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#include "llvm/MC/MCFixedLenDisassembler.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/MemoryObject.h"
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#include "llvm/Support/TargetRegistry.h"
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// Not a normal header, this must come last.
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#include "MipsGenEDInfo.inc"
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using namespace llvm;
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typedef MCDisassembler::DecodeStatus DecodeStatus;
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namespace {
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/// MipsDisassemblerBase - a disasembler class for Mips.
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class MipsDisassemblerBase : public MCDisassembler {
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public:
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/// Constructor - Initializes the disassembler.
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///
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MipsDisassemblerBase(const MCSubtargetInfo &STI, const MCRegisterInfo *Info,
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bool bigEndian) :
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MCDisassembler(STI), RegInfo(Info), isBigEndian(bigEndian) {}
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virtual ~MipsDisassemblerBase() {}
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/// getEDInfo - See MCDisassembler.
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const EDInstInfo *getEDInfo() const;
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const MCRegisterInfo *getRegInfo() const { return RegInfo; }
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private:
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const MCRegisterInfo *RegInfo;
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protected:
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bool isBigEndian;
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};
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/// MipsDisassembler - a disasembler class for Mips32.
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class MipsDisassembler : public MipsDisassemblerBase {
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public:
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/// Constructor - Initializes the disassembler.
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///
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MipsDisassembler(const MCSubtargetInfo &STI, const MCRegisterInfo *Info,
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bool bigEndian) :
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MipsDisassemblerBase(STI, Info, bigEndian) {}
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/// getInstruction - See MCDisassembler.
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virtual DecodeStatus getInstruction(MCInst &instr,
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uint64_t &size,
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const MemoryObject ®ion,
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uint64_t address,
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raw_ostream &vStream,
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raw_ostream &cStream) const;
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};
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/// Mips64Disassembler - a disasembler class for Mips64.
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class Mips64Disassembler : public MipsDisassemblerBase {
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public:
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/// Constructor - Initializes the disassembler.
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///
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Mips64Disassembler(const MCSubtargetInfo &STI, const MCRegisterInfo *Info,
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bool bigEndian) :
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MipsDisassemblerBase(STI, Info, bigEndian) {}
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/// getInstruction - See MCDisassembler.
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virtual DecodeStatus getInstruction(MCInst &instr,
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uint64_t &size,
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const MemoryObject ®ion,
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uint64_t address,
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raw_ostream &vStream,
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raw_ostream &cStream) const;
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};
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} // end anonymous namespace
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const EDInstInfo *MipsDisassemblerBase::getEDInfo() const {
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return instInfoMips;
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}
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// Forward declare these because the autogenerated code will reference them.
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// Definitions are further down.
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static DecodeStatus DecodeCPU64RegsRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeCPURegsRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeDSPRegsRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeHWRegs64RegisterClass(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeACRegsRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeBranchTarget(MCInst &Inst,
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unsigned Offset,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeBC1(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeJumpTarget(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeMem(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeFMem(MCInst &Inst, unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeSimm16(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeCondCode(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeInsSize(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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static DecodeStatus DecodeExtSize(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder);
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namespace llvm {
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extern Target TheMipselTarget, TheMipsTarget, TheMips64Target,
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TheMips64elTarget;
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}
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static MCDisassembler *createMipsDisassembler(
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const Target &T,
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const MCSubtargetInfo &STI) {
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return new MipsDisassembler(STI, T.createMCRegInfo(""), true);
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}
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static MCDisassembler *createMipselDisassembler(
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const Target &T,
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const MCSubtargetInfo &STI) {
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return new MipsDisassembler(STI, T.createMCRegInfo(""), false);
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}
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static MCDisassembler *createMips64Disassembler(
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const Target &T,
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const MCSubtargetInfo &STI) {
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return new Mips64Disassembler(STI, T.createMCRegInfo(""), true);
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}
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static MCDisassembler *createMips64elDisassembler(
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const Target &T,
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const MCSubtargetInfo &STI) {
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return new Mips64Disassembler(STI, T.createMCRegInfo(""), false);
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}
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extern "C" void LLVMInitializeMipsDisassembler() {
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// Register the disassembler.
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TargetRegistry::RegisterMCDisassembler(TheMipsTarget,
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createMipsDisassembler);
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TargetRegistry::RegisterMCDisassembler(TheMipselTarget,
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createMipselDisassembler);
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TargetRegistry::RegisterMCDisassembler(TheMips64Target,
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createMips64Disassembler);
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TargetRegistry::RegisterMCDisassembler(TheMips64elTarget,
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createMips64elDisassembler);
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}
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#include "MipsGenDisassemblerTables.inc"
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/// readInstruction - read four bytes from the MemoryObject
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/// and return 32 bit word sorted according to the given endianess
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static DecodeStatus readInstruction32(const MemoryObject ®ion,
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uint64_t address,
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uint64_t &size,
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uint32_t &insn,
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bool isBigEndian) {
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uint8_t Bytes[4];
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// We want to read exactly 4 Bytes of data.
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if (region.readBytes(address, 4, (uint8_t*)Bytes, NULL) == -1) {
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size = 0;
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return MCDisassembler::Fail;
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}
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if (isBigEndian) {
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// Encoded as a big-endian 32-bit word in the stream.
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insn = (Bytes[3] << 0) |
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(Bytes[2] << 8) |
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(Bytes[1] << 16) |
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(Bytes[0] << 24);
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}
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else {
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// Encoded as a small-endian 32-bit word in the stream.
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insn = (Bytes[0] << 0) |
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(Bytes[1] << 8) |
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(Bytes[2] << 16) |
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(Bytes[3] << 24);
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}
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return MCDisassembler::Success;
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}
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DecodeStatus
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MipsDisassembler::getInstruction(MCInst &instr,
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uint64_t &Size,
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const MemoryObject &Region,
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uint64_t Address,
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raw_ostream &vStream,
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raw_ostream &cStream) const {
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uint32_t Insn;
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DecodeStatus Result = readInstruction32(Region, Address, Size,
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Insn, isBigEndian);
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if (Result == MCDisassembler::Fail)
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return MCDisassembler::Fail;
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// Calling the auto-generated decoder function.
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Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address,
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this, STI);
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if (Result != MCDisassembler::Fail) {
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Size = 4;
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return Result;
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}
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return MCDisassembler::Fail;
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}
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DecodeStatus
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Mips64Disassembler::getInstruction(MCInst &instr,
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uint64_t &Size,
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const MemoryObject &Region,
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uint64_t Address,
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raw_ostream &vStream,
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raw_ostream &cStream) const {
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uint32_t Insn;
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DecodeStatus Result = readInstruction32(Region, Address, Size,
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Insn, isBigEndian);
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if (Result == MCDisassembler::Fail)
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return MCDisassembler::Fail;
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// Calling the auto-generated decoder function.
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Result = decodeInstruction(DecoderTableMips6432, instr, Insn, Address,
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this, STI);
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if (Result != MCDisassembler::Fail) {
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Size = 4;
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return Result;
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}
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// If we fail to decode in Mips64 decoder space we can try in Mips32
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Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address,
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this, STI);
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if (Result != MCDisassembler::Fail) {
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Size = 4;
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return Result;
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}
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return MCDisassembler::Fail;
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}
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static unsigned getReg(const void *D, unsigned RC, unsigned RegNo) {
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const MipsDisassemblerBase *Dis = static_cast<const MipsDisassemblerBase*>(D);
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return *(Dis->getRegInfo()->getRegClass(RC).begin() + RegNo);
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}
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static DecodeStatus DecodeCPU64RegsRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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if (RegNo > 31)
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return MCDisassembler::Fail;
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unsigned Reg = getReg(Decoder, Mips::CPU64RegsRegClassID, RegNo);
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Inst.addOperand(MCOperand::CreateReg(Reg));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeCPURegsRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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if (RegNo > 31)
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return MCDisassembler::Fail;
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unsigned Reg = getReg(Decoder, Mips::CPURegsRegClassID, RegNo);
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Inst.addOperand(MCOperand::CreateReg(Reg));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeDSPRegsRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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return DecodeCPURegsRegisterClass(Inst, RegNo, Address, Decoder);
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}
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static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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if (RegNo > 31)
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return MCDisassembler::Fail;
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unsigned Reg = getReg(Decoder, Mips::FGR64RegClassID, RegNo);
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Inst.addOperand(MCOperand::CreateReg(Reg));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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if (RegNo > 31)
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return MCDisassembler::Fail;
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unsigned Reg = getReg(Decoder, Mips::FGR32RegClassID, RegNo);
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Inst.addOperand(MCOperand::CreateReg(Reg));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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Inst.addOperand(MCOperand::CreateReg(RegNo));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeMem(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder) {
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int Offset = SignExtend32<16>(Insn & 0xffff);
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unsigned Reg = fieldFromInstruction(Insn, 16, 5);
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unsigned Base = fieldFromInstruction(Insn, 21, 5);
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Reg = getReg(Decoder, Mips::CPURegsRegClassID, Reg);
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Base = getReg(Decoder, Mips::CPURegsRegClassID, Base);
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if(Inst.getOpcode() == Mips::SC){
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Inst.addOperand(MCOperand::CreateReg(Reg));
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}
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Inst.addOperand(MCOperand::CreateReg(Reg));
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Inst.addOperand(MCOperand::CreateReg(Base));
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Inst.addOperand(MCOperand::CreateImm(Offset));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeFMem(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder) {
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int Offset = SignExtend32<16>(Insn & 0xffff);
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unsigned Reg = fieldFromInstruction(Insn, 16, 5);
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unsigned Base = fieldFromInstruction(Insn, 21, 5);
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Reg = getReg(Decoder, Mips::FGR64RegClassID, Reg);
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Base = getReg(Decoder, Mips::CPURegsRegClassID, Base);
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Inst.addOperand(MCOperand::CreateReg(Reg));
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Inst.addOperand(MCOperand::CreateReg(Base));
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Inst.addOperand(MCOperand::CreateImm(Offset));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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// Currently only hardware register 29 is supported.
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if (RegNo != 29)
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return MCDisassembler::Fail;
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Inst.addOperand(MCOperand::CreateReg(Mips::HWR29));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeCondCode(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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const void *Decoder) {
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int CondCode = Insn & 0xf;
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Inst.addOperand(MCOperand::CreateImm(CondCode));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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if (RegNo > 30 || RegNo %2)
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return MCDisassembler::Fail;
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;
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unsigned Reg = getReg(Decoder, Mips::AFGR64RegClassID, RegNo /2);
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Inst.addOperand(MCOperand::CreateReg(Reg));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeHWRegs64RegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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//Currently only hardware register 29 is supported
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if (RegNo != 29)
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return MCDisassembler::Fail;
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Inst.addOperand(MCOperand::CreateReg(Mips::HWR29_64));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeACRegsRegisterClass(MCInst &Inst,
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unsigned RegNo,
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uint64_t Address,
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const void *Decoder) {
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if (RegNo >= 4)
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return MCDisassembler::Fail;
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unsigned Reg = getReg(Decoder, Mips::ACRegsRegClassID, RegNo);
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Inst.addOperand(MCOperand::CreateReg(Reg));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeBranchTarget(MCInst &Inst,
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unsigned Offset,
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uint64_t Address,
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const void *Decoder) {
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unsigned BranchOffset = Offset & 0xffff;
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BranchOffset = SignExtend32<18>(BranchOffset << 2) + 4;
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Inst.addOperand(MCOperand::CreateImm(BranchOffset));
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return MCDisassembler::Success;
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}
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static DecodeStatus DecodeBC1(MCInst &Inst,
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unsigned Insn,
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uint64_t Address,
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|
const void *Decoder) {
|
|
unsigned BranchOffset = Insn & 0xffff;
|
|
BranchOffset = SignExtend32<18>(BranchOffset << 2) + 4;
|
|
Inst.addOperand(MCOperand::CreateImm(BranchOffset));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeJumpTarget(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
|
|
unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 2;
|
|
Inst.addOperand(MCOperand::CreateImm(JumpOffset));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
|
|
static DecodeStatus DecodeSimm16(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Insn)));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeInsSize(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
// First we need to grab the pos(lsb) from MCInst.
|
|
int Pos = Inst.getOperand(2).getImm();
|
|
int Size = (int) Insn - Pos + 1;
|
|
Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Size)));
|
|
return MCDisassembler::Success;
|
|
}
|
|
|
|
static DecodeStatus DecodeExtSize(MCInst &Inst,
|
|
unsigned Insn,
|
|
uint64_t Address,
|
|
const void *Decoder) {
|
|
int Size = (int) Insn + 1;
|
|
Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Size)));
|
|
return MCDisassembler::Success;
|
|
}
|