diff options
Diffstat (limited to 'llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp')
| -rw-r--r-- | llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp | 131 |
1 files changed, 53 insertions, 78 deletions
diff --git a/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp b/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp index 76f4c2a2bdb..d733b1b85d6 100644 --- a/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp +++ b/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp @@ -31,15 +31,14 @@ typedef MCDisassembler::DecodeStatus DecodeStatus; namespace { -/// MipsDisassemblerBase - a disasembler class for Mips. +/// A disasembler class for Mips. class MipsDisassemblerBase : public MCDisassembler { public: - /// Constructor - Initializes the disassembler. - /// MipsDisassemblerBase(const MCSubtargetInfo &STI, MCContext &Ctx, - bool bigEndian) : - MCDisassembler(STI, Ctx), - IsN64(STI.getFeatureBits() & Mips::FeatureN64), isBigEndian(bigEndian) {} + bool IsBigEndian) + : MCDisassembler(STI, Ctx), + IsN64(STI.getFeatureBits() & Mips::FeatureN64), + IsBigEndian(IsBigEndian) {} virtual ~MipsDisassemblerBase() {} @@ -48,15 +47,13 @@ public: private: bool IsN64; protected: - bool isBigEndian; + bool IsBigEndian; }; -/// MipsDisassembler - a disasembler class for Mips32. +/// A disasembler class for Mips32. class MipsDisassembler : public MipsDisassemblerBase { bool IsMicroMips; public: - /// Constructor - Initializes the disassembler. - /// MipsDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, bool bigEndian) : MipsDisassemblerBase(STI, Ctx, bigEndian) { IsMicroMips = STI.getFeatureBits() & Mips::FeatureMicroMips; @@ -75,32 +72,23 @@ public: return !hasMips32() && !hasMips3(); } - /// getInstruction - See MCDisassembler. - DecodeStatus getInstruction(MCInst &instr, - uint64_t &size, - const MemoryObject ®ion, - uint64_t address, - raw_ostream &vStream, - raw_ostream &cStream) const override; + DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, + const MemoryObject &Region, uint64_t Address, + raw_ostream &VStream, + raw_ostream &CStream) const override; }; - -/// Mips64Disassembler - a disasembler class for Mips64. +/// A disasembler class for Mips64. class Mips64Disassembler : public MipsDisassemblerBase { public: - /// Constructor - Initializes the disassembler. - /// Mips64Disassembler(const MCSubtargetInfo &STI, MCContext &Ctx, bool bigEndian) : MipsDisassemblerBase(STI, Ctx, bigEndian) {} - /// getInstruction - See MCDisassembler. - DecodeStatus getInstruction(MCInst &instr, - uint64_t &size, - const MemoryObject ®ion, - uint64_t address, - raw_ostream &vStream, - raw_ostream &cStream) const override; + DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size, + const MemoryObject &Region, uint64_t Address, + raw_ostream &VStream, + raw_ostream &CStream) const override; }; } // end anonymous namespace @@ -709,43 +697,34 @@ static DecodeStatus DecodeBlezGroupBranch(MCInst &MI, InsnType insn, return MCDisassembler::Success; } - /// readInstruction - read four bytes from the MemoryObject - /// and return 32 bit word sorted according to the given endianess -static DecodeStatus readInstruction32(const MemoryObject ®ion, - uint64_t address, - uint64_t &size, - uint32_t &insn, - bool isBigEndian, +/// Read four bytes from the MemoryObject and return 32 bit word sorted +/// according to the given endianess +static DecodeStatus readInstruction32(const MemoryObject &Region, + uint64_t Address, uint64_t &Size, + uint32_t &Insn, bool IsBigEndian, bool IsMicroMips) { uint8_t Bytes[4]; // We want to read exactly 4 Bytes of data. - if (region.readBytes(address, 4, Bytes) == -1) { - size = 0; + if (Region.readBytes(Address, 4, Bytes) == -1) { + Size = 0; return MCDisassembler::Fail; } - if (isBigEndian) { + if (IsBigEndian) { // Encoded as a big-endian 32-bit word in the stream. - insn = (Bytes[3] << 0) | - (Bytes[2] << 8) | - (Bytes[1] << 16) | - (Bytes[0] << 24); - } - else { + Insn = + (Bytes[3] << 0) | (Bytes[2] << 8) | (Bytes[1] << 16) | (Bytes[0] << 24); + } else { // Encoded as a small-endian 32-bit word in the stream. // Little-endian byte ordering: // mips32r2: 4 | 3 | 2 | 1 // microMIPS: 2 | 1 | 4 | 3 if (IsMicroMips) { - insn = (Bytes[2] << 0) | - (Bytes[3] << 8) | - (Bytes[0] << 16) | + Insn = (Bytes[2] << 0) | (Bytes[3] << 8) | (Bytes[0] << 16) | (Bytes[1] << 24); } else { - insn = (Bytes[0] << 0) | - (Bytes[1] << 8) | - (Bytes[2] << 16) | + Insn = (Bytes[0] << 0) | (Bytes[1] << 8) | (Bytes[2] << 16) | (Bytes[3] << 24); } } @@ -753,24 +732,22 @@ static DecodeStatus readInstruction32(const MemoryObject ®ion, return MCDisassembler::Success; } -DecodeStatus -MipsDisassembler::getInstruction(MCInst &instr, - uint64_t &Size, - const MemoryObject &Region, - uint64_t Address, - raw_ostream &vStream, - raw_ostream &cStream) const { +DecodeStatus MipsDisassembler::getInstruction(MCInst &Instr, uint64_t &Size, + const MemoryObject &Region, + uint64_t Address, + raw_ostream &VStream, + raw_ostream &CStream) const { uint32_t Insn; - DecodeStatus Result = readInstruction32(Region, Address, Size, - Insn, isBigEndian, IsMicroMips); + DecodeStatus Result = + readInstruction32(Region, Address, Size, Insn, IsBigEndian, IsMicroMips); if (Result == MCDisassembler::Fail) return MCDisassembler::Fail; if (IsMicroMips) { DEBUG(dbgs() << "Trying MicroMips32 table (32-bit opcodes):\n"); // Calling the auto-generated decoder function. - Result = decodeInstruction(DecoderTableMicroMips32, instr, Insn, Address, + Result = decodeInstruction(DecoderTableMicroMips32, Instr, Insn, Address, this, STI); if (Result != MCDisassembler::Fail) { Size = 4; @@ -782,7 +759,7 @@ MipsDisassembler::getInstruction(MCInst &instr, if (hasCOP3()) { DEBUG(dbgs() << "Trying COP3_ table (32-bit opcodes):\n"); Result = - decodeInstruction(DecoderTableCOP3_32, instr, Insn, Address, this, STI); + decodeInstruction(DecoderTableCOP3_32, Instr, Insn, Address, this, STI); if (Result != MCDisassembler::Fail) { Size = 4; return Result; @@ -791,7 +768,7 @@ MipsDisassembler::getInstruction(MCInst &instr, if (hasMips32r6() && isGP64()) { DEBUG(dbgs() << "Trying Mips32r6_64r6 (GPR64) table (32-bit opcodes):\n"); - Result = decodeInstruction(DecoderTableMips32r6_64r6_GP6432, instr, Insn, + Result = decodeInstruction(DecoderTableMips32r6_64r6_GP6432, Instr, Insn, Address, this, STI); if (Result != MCDisassembler::Fail) { Size = 4; @@ -801,7 +778,7 @@ MipsDisassembler::getInstruction(MCInst &instr, if (hasMips32r6()) { DEBUG(dbgs() << "Trying Mips32r6_64r6 table (32-bit opcodes):\n"); - Result = decodeInstruction(DecoderTableMips32r6_64r632, instr, Insn, + Result = decodeInstruction(DecoderTableMips32r6_64r632, Instr, Insn, Address, this, STI); if (Result != MCDisassembler::Fail) { Size = 4; @@ -811,8 +788,8 @@ MipsDisassembler::getInstruction(MCInst &instr, DEBUG(dbgs() << "Trying Mips table (32-bit opcodes):\n"); // Calling the auto-generated decoder function. - Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address, - this, STI); + Result = + decodeInstruction(DecoderTableMips32, Instr, Insn, Address, this, STI); if (Result != MCDisassembler::Fail) { Size = 4; return Result; @@ -821,30 +798,28 @@ MipsDisassembler::getInstruction(MCInst &instr, return MCDisassembler::Fail; } -DecodeStatus -Mips64Disassembler::getInstruction(MCInst &instr, - uint64_t &Size, - const MemoryObject &Region, - uint64_t Address, - raw_ostream &vStream, - raw_ostream &cStream) const { +DecodeStatus Mips64Disassembler::getInstruction(MCInst &Instr, uint64_t &Size, + const MemoryObject &Region, + uint64_t Address, + raw_ostream &VStream, + raw_ostream &CStream) const { uint32_t Insn; - DecodeStatus Result = readInstruction32(Region, Address, Size, - Insn, isBigEndian, false); + DecodeStatus Result = + readInstruction32(Region, Address, Size, Insn, IsBigEndian, false); if (Result == MCDisassembler::Fail) return MCDisassembler::Fail; // Calling the auto-generated decoder function. - Result = decodeInstruction(DecoderTableMips6432, instr, Insn, Address, - this, STI); + Result = + decodeInstruction(DecoderTableMips6432, Instr, Insn, Address, this, STI); if (Result != MCDisassembler::Fail) { Size = 4; return Result; } // If we fail to decode in Mips64 decoder space we can try in Mips32 - Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address, - this, STI); + Result = + decodeInstruction(DecoderTableMips32, Instr, Insn, Address, this, STI); if (Result != MCDisassembler::Fail) { Size = 4; return Result; |
