Index: lldb/source/Plugins/Instruction/LoongArch/EmulateInstructionLoongArch.h =================================================================== --- lldb/source/Plugins/Instruction/LoongArch/EmulateInstructionLoongArch.h +++ lldb/source/Plugins/Instruction/LoongArch/EmulateInstructionLoongArch.h @@ -68,6 +68,17 @@ Opcode *GetOpcodeForInstruction(uint32_t inst); + bool EmulateBEQZ(uint32_t inst); + bool EmulateBNEZ(uint32_t inst); + bool EmulateJIRL(uint32_t inst); + bool EmulateB(uint32_t inst); + bool EmulateBL(uint32_t inst); + bool EmulateBEQ(uint32_t inst); + bool EmulateBNE(uint32_t inst); + bool EmulateBLT(uint32_t inst); + bool EmulateBGE(uint32_t inst); + bool EmulateBLTU(uint32_t inst); + bool EmulateBGEU(uint32_t inst); bool EmulateNonJMP(uint32_t inst); }; Index: lldb/source/Plugins/Instruction/LoongArch/EmulateInstructionLoongArch.cpp =================================================================== --- lldb/source/Plugins/Instruction/LoongArch/EmulateInstructionLoongArch.cpp +++ lldb/source/Plugins/Instruction/LoongArch/EmulateInstructionLoongArch.cpp @@ -33,8 +33,30 @@ EmulateInstructionLoongArch::Opcode * EmulateInstructionLoongArch::GetOpcodeForInstruction(uint32_t inst) { - // TODO: Add the mask of jump instruction. + // TODO: Add the mask for other instruction. static EmulateInstructionLoongArch::Opcode g_opcodes[] = { + {0xfc000000, 0x40000000, &EmulateInstructionLoongArch::EmulateBEQZ, + "beqz rj, offs21"}, + {0xfc000000, 0x44000000, &EmulateInstructionLoongArch::EmulateBNEZ, + "bnez rj, offs21"}, + {0xfc000000, 0x4c000000, &EmulateInstructionLoongArch::EmulateJIRL, + "jirl rd, rj, offs16"}, + {0xfc000000, 0x50000000, &EmulateInstructionLoongArch::EmulateB, + " b offs26"}, + {0xfc000000, 0x54000000, &EmulateInstructionLoongArch::EmulateBL, + "bl offs26"}, + {0xfc000000, 0x58000000, &EmulateInstructionLoongArch::EmulateBEQ, + "beq rj, rd, offs16"}, + {0xfc000000, 0x5c000000, &EmulateInstructionLoongArch::EmulateBNE, + "bne rj, rd, offs16"}, + {0xfc000000, 0x60000000, &EmulateInstructionLoongArch::EmulateBLT, + "blt rj, rd, offs16"}, + {0xfc000000, 0x64000000, &EmulateInstructionLoongArch::EmulateBGE, + "bge rj, rd, offs16"}, + {0xfc000000, 0x68000000, &EmulateInstructionLoongArch::EmulateBLTU, + "bltu rj, rd, offs16"}, + {0xfc000000, 0x6c000000, &EmulateInstructionLoongArch::EmulateBGEU, + "bgeu rj, rd, offs16"}, {0x00000000, 0x00000000, &EmulateInstructionLoongArch::EmulateNonJMP, "NonJMP"}}; static const size_t num_loongarch_opcodes = std::size(g_opcodes); @@ -176,6 +198,231 @@ return arch.GetTriple().isLoongArch(); } +// beqz rj, offs21 +// if GR[rj] == 0: +// PC = PC + SignExtend({offs21, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateBEQZ(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint32_t rj = Bits32(inst, 9, 5); + uint64_t rj_val; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + uint32_t offs21 = Bits32(inst, 25, 10) + (Bits32(inst, 4, 0) << 16); + rj_val = ReadRegisterUnsigned(eRegisterKindLLDB, rj, 0, &success); + if (rj_val == 0) { + imm_sign_extend = llvm::SignExtend64<23>(offs21 << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); + } else + return WritePC(pc + 4); +} + +// bnez rj, offs21 +// if GR[rj] != 0: +// PC = PC + SignExtend({offs21, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateBNEZ(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint32_t rj = Bits32(inst, 9, 5); + uint64_t rj_val; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + uint32_t offs21 = Bits32(inst, 25, 10) + (Bits32(inst, 4, 0) << 16); + rj_val = ReadRegisterUnsigned(eRegisterKindLLDB, rj, 0, &success); + if (rj_val != 0) { + imm_sign_extend = llvm::SignExtend64<23>(offs21 << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); + } else + return WritePC(pc + 4); +} + +// jirl rd, rj, offs16 +// GR[rd] = PC + 4 +// PC = GR[rj] + SignExtend({offs16, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateJIRL(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + RegisterValue value; + uint32_t rj = Bits32(inst, 9, 5); + uint32_t rd = Bits32(inst, 4, 0); + bool success = false; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + EmulateInstruction::Context ctx; + if (!WriteRegisterUnsigned(ctx, eRegisterKindLLDB, rd, pc + 4)) + return false; + ReadRegister(eRegisterKindLLDB, rj, value); + imm_sign_extend = llvm::SignExtend64<18>(Bits32(inst, 25, 10) << 2); + next_pc = value.GetAsUInt64() + imm_sign_extend; + return WritePC(next_pc); +} + +// b offs26 +// PC = PC + SignExtend({offs26, 2' b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateB(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint64_t pc = ReadPC(&success); + uint32_t offs26 = Bits32(inst, 25, 10) + (Bits32(inst, 9, 0) << 16); + imm_sign_extend = llvm::SignExtend64<28>(offs26 << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); +} + +// bl offs26 +// GR[1] = PC + 4 +// PC = PC + SignExtend({offs26, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateBL(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + EmulateInstruction::Context ctx; + if (!WriteRegisterUnsigned(ctx, eRegisterKindLLDB, gpr_r1_loongarch, pc + 4)) + return false; + uint32_t offs26 = Bits32(inst, 25, 10) + (Bits32(inst, 9, 0) << 16); + imm_sign_extend = llvm::SignExtend64<28>(offs26 << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); +} + +// beq rj, rd, offs16 +// if GR[rj] == GR[rd]: +// PC = PC + SignExtend({offs16, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateBEQ(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint32_t rj = Bits32(inst, 9, 5); + uint32_t rd = Bits32(inst, 4, 0); + uint64_t rj_val, rd_val; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + rj_val = ReadRegisterUnsigned(eRegisterKindLLDB, rj, 0, &success); + rd_val = ReadRegisterUnsigned(eRegisterKindLLDB, rd, 0, &success); + if (rj_val == rd_val) { + imm_sign_extend = llvm::SignExtend64<18>(Bits32(inst, 25, 10) << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); + } else + return WritePC(pc + 4); +} + +// bne rj, rd, offs16 +// if GR[rj] != GR[rd]: +// PC = PC + SignExtend({offs16, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateBNE(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint32_t rj = Bits32(inst, 9, 5); + uint32_t rd = Bits32(inst, 4, 0); + uint64_t rj_val, rd_val; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + rj_val = ReadRegisterUnsigned(eRegisterKindLLDB, rj, 0, &success); + rd_val = ReadRegisterUnsigned(eRegisterKindLLDB, rd, 0, &success); + if (rj_val != rd_val) { + imm_sign_extend = llvm::SignExtend64<18>(Bits32(inst, 25, 10) << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); + } else + return WritePC(pc + 4); +} + +// blt rj, rd, offs16 +// if signed(GR[rj]) < signed(GR[rd]): +// PC = PC + SignExtend({offs16, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateBLT(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint32_t rj = Bits32(inst, 9, 5); + uint32_t rd = Bits32(inst, 4, 0); + int64_t rj_val, rd_val; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + rj_val = (int64_t)ReadRegisterUnsigned(eRegisterKindLLDB, rj, 0, &success); + rd_val = (int64_t)ReadRegisterUnsigned(eRegisterKindLLDB, rd, 0, &success); + if (rj_val < rd_val) { + imm_sign_extend = llvm::SignExtend64<18>(Bits32(inst, 25, 10) << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); + } else + return WritePC(pc + 4); +} + +// bge rj, rd, offs16 +// if signed(GR[rj]) >= signed(GR[rd]): +// PC = PC + SignExtend({offs16, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateBGE(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint32_t rj = Bits32(inst, 9, 5); + uint32_t rd = Bits32(inst, 4, 0); + int64_t rj_val, rd_val; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + rj_val = (int64_t)ReadRegisterUnsigned(eRegisterKindLLDB, rj, 0, &success); + rd_val = (int64_t)ReadRegisterUnsigned(eRegisterKindLLDB, rd, 0, &success); + if (rj_val >= rd_val) { + imm_sign_extend = llvm::SignExtend64<18>(Bits32(inst, 25, 10) << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); + } else + return WritePC(pc + 4); +} + +// bltu rj, rd, offs16 +// if unsigned(GR[rj]) < unsigned(GR[rd]): +// PC = PC + SignExtend({offs16, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateBLTU(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint32_t rj = Bits32(inst, 9, 5); + uint32_t rd = Bits32(inst, 4, 0); + uint64_t rj_val, rd_val; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + rj_val = ReadRegisterUnsigned(eRegisterKindLLDB, rj, 0, &success); + rd_val = ReadRegisterUnsigned(eRegisterKindLLDB, rd, 0, &success); + if (rj_val < rd_val) { + imm_sign_extend = llvm::SignExtend64<18>(Bits32(inst, 25, 10) << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); + } else + return WritePC(pc + 4); +} + +// bgeu rj, rd, offs16 +// if unsigned(GR[rj]) >= unsigned(GR[rd]): +// PC = PC + SignExtend({offs16, 2'b0}, GRLEN) +bool EmulateInstructionLoongArch::EmulateBGEU(uint32_t inst) { + uint64_t next_pc, imm_sign_extend; + bool success = false; + uint32_t rj = Bits32(inst, 9, 5); + uint32_t rd = Bits32(inst, 4, 0); + uint64_t rj_val, rd_val; + uint64_t pc = ReadPC(&success); + if (!success) + return false; + rj_val = ReadRegisterUnsigned(eRegisterKindLLDB, rj, 0, &success); + rd_val = ReadRegisterUnsigned(eRegisterKindLLDB, rd, 0, &success); + if (rj_val >= rd_val) { + imm_sign_extend = llvm::SignExtend64<18>(Bits32(inst, 25, 10) << 2); + next_pc = pc + imm_sign_extend; + return WritePC(next_pc); + } else + return WritePC(pc + 4); +} + bool EmulateInstructionLoongArch::EmulateNonJMP(uint32_t inst) { return false; } } // namespace lldb_private