--- /dev/null
+//===---EmulateInstructionLoongArch.cpp------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <cstdlib>
+
+#include "EmulateInstructionLoongArch.h"
+#include "Plugins/Process/Utility/InstructionUtils.h"
+#include "Plugins/Process/Utility/RegisterInfoPOSIX_loongarch64.h"
+#include "Plugins/Process/Utility/lldb-loongarch-register-enums.h"
+#include "lldb/Core/Address.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Interpreter/OptionValueArray.h"
+#include "lldb/Interpreter/OptionValueDictionary.h"
+#include "lldb/Symbol/UnwindPlan.h"
+#include "lldb/Utility/ArchSpec.h"
+#include "lldb/Utility/LLDBLog.h"
+#include "lldb/Utility/RegisterValue.h"
+#include "lldb/Utility/Stream.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/MathExtras.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+LLDB_PLUGIN_DEFINE_ADV(EmulateInstructionLoongArch, InstructionLoongArch)
+
+namespace lldb_private {
+
+EmulateInstructionLoongArch::Opcode *
+EmulateInstructionLoongArch::GetOpcodeForInstruction(uint32_t inst) {
+ // TODO: Add the mask of jump instruction.
+ static EmulateInstructionLoongArch::Opcode g_opcodes[] = {
+ {0x00000000, 0x00000000, &EmulateInstructionLoongArch::EmulateNonJMP,
+ "NonJMP"}};
+ static const size_t num_loongarch_opcodes = std::size(g_opcodes);
+
+ for (size_t i = 0; i < num_loongarch_opcodes; ++i)
+ if ((g_opcodes[i].mask & inst) == g_opcodes[i].value)
+ return &g_opcodes[i];
+ return nullptr;
+}
+
+bool EmulateInstructionLoongArch::EvaluateInstruction(uint32_t options) {
+ uint32_t inst_size = m_opcode.GetByteSize();
+ uint32_t inst = m_opcode.GetOpcode32();
+ bool increase_pc = options & eEmulateInstructionOptionAutoAdvancePC;
+ bool success = false;
+
+ Opcode *opcode_data = GetOpcodeForInstruction(inst);
+ if (!opcode_data)
+ return false;
+
+ lldb::addr_t old_pc = 0;
+ if (increase_pc) {
+ old_pc = ReadPC(&success);
+ if (!success)
+ return false;
+ }
+
+ // Call the Emulate... function.
+ if (!(this->*opcode_data->callback)(inst))
+ return false;
+
+ if (increase_pc) {
+ lldb::addr_t new_pc = ReadPC(&success);
+ if (!success)
+ return false;
+
+ if (new_pc == old_pc && !WritePC(old_pc + inst_size))
+ return false;
+ }
+ return true;
+}
+
+bool EmulateInstructionLoongArch::ReadInstruction() {
+ bool success = false;
+ m_addr = ReadPC(&success);
+ if (!success) {
+ m_addr = LLDB_INVALID_ADDRESS;
+ return false;
+ }
+
+ Context ctx;
+ ctx.type = eContextReadOpcode;
+ ctx.SetNoArgs();
+ uint32_t inst = (uint32_t)ReadMemoryUnsigned(ctx, m_addr, 4, 0, &success);
+ m_opcode.SetOpcode32(inst, GetByteOrder());
+
+ return true;
+}
+
+lldb::addr_t EmulateInstructionLoongArch::ReadPC(bool *success) {
+ return ReadRegisterUnsigned(eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC,
+ LLDB_INVALID_ADDRESS, success);
+}
+
+bool EmulateInstructionLoongArch::WritePC(lldb::addr_t pc) {
+ EmulateInstruction::Context ctx;
+ ctx.type = eContextAdvancePC;
+ ctx.SetNoArgs();
+ return WriteRegisterUnsigned(ctx, eRegisterKindGeneric,
+ LLDB_REGNUM_GENERIC_PC, pc);
+}
+
+llvm::Optional<RegisterInfo>
+EmulateInstructionLoongArch::GetRegisterInfo(lldb::RegisterKind reg_kind,
+ uint32_t reg_index) {
+ if (reg_kind == eRegisterKindGeneric) {
+ switch (reg_index) {
+ case LLDB_REGNUM_GENERIC_PC:
+ reg_kind = eRegisterKindLLDB;
+ reg_index = gpr_pc_loongarch;
+ break;
+ case LLDB_REGNUM_GENERIC_SP:
+ reg_kind = eRegisterKindLLDB;
+ reg_index = gpr_sp_loongarch;
+ break;
+ case LLDB_REGNUM_GENERIC_FP:
+ reg_kind = eRegisterKindLLDB;
+ reg_index = gpr_fp_loongarch;
+ break;
+ case LLDB_REGNUM_GENERIC_RA:
+ reg_kind = eRegisterKindLLDB;
+ reg_index = gpr_ra_loongarch;
+ break;
+ // We may handle LLDB_REGNUM_GENERIC_ARGx when more instructions are
+ // supported.
+ default:
+ llvm_unreachable("unsupported register");
+ }
+ }
+
+ const RegisterInfo *array =
+ RegisterInfoPOSIX_loongarch64::GetRegisterInfoPtr(m_arch);
+ const uint32_t length =
+ RegisterInfoPOSIX_loongarch64::GetRegisterInfoCount(m_arch);
+
+ if (reg_index >= length || reg_kind != eRegisterKindLLDB)
+ return {};
+ return array[reg_index];
+}
+
+bool EmulateInstructionLoongArch::SetTargetTriple(const ArchSpec &arch) {
+ return SupportsThisArch(arch);
+}
+
+bool EmulateInstructionLoongArch::TestEmulation(
+ Stream *out_stream, ArchSpec &arch, OptionValueDictionary *test_data) {
+ return false;
+}
+
+void EmulateInstructionLoongArch::Initialize() {
+ PluginManager::RegisterPlugin(GetPluginNameStatic(),
+ GetPluginDescriptionStatic(), CreateInstance);
+}
+
+void EmulateInstructionLoongArch::Terminate() {
+ PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+lldb_private::EmulateInstruction *
+EmulateInstructionLoongArch::CreateInstance(const ArchSpec &arch,
+ InstructionType inst_type) {
+ if (EmulateInstructionLoongArch::SupportsThisInstructionType(inst_type) &&
+ SupportsThisArch(arch))
+ return new EmulateInstructionLoongArch(arch);
+ return nullptr;
+}
+
+bool EmulateInstructionLoongArch::SupportsThisArch(const ArchSpec &arch) {
+ return arch.GetTriple().isLoongArch();
+}
+
+bool EmulateInstructionLoongArch::EmulateNonJMP(uint32_t inst) { return false; }
+
+} // namespace lldb_private
--- /dev/null
+//===---EmulateInstructionLoongArch.h--------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_INSTRUCTION_LOONGARCH_EMULATEINSTRUCTIONLOONGARCH_H
+#define LLDB_SOURCE_PLUGINS_INSTRUCTION_LOONGARCH_EMULATEINSTRUCTIONLOONGARCH_H
+
+#include "lldb/Core/EmulateInstruction.h"
+#include "lldb/Interpreter/OptionValue.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/Status.h"
+
+namespace lldb_private {
+
+class EmulateInstructionLoongArch : public EmulateInstruction {
+public:
+ static llvm::StringRef GetPluginNameStatic() { return "LoongArch"; }
+
+ static llvm::StringRef GetPluginDescriptionStatic() {
+ return "Emulate instructions for the LoongArch architecture.";
+ }
+
+ static bool SupportsThisInstructionType(InstructionType inst_type) {
+ return inst_type == eInstructionTypePCModifying;
+ }
+
+ static bool SupportsThisArch(const ArchSpec &arch);
+
+ static lldb_private::EmulateInstruction *
+ CreateInstance(const lldb_private::ArchSpec &arch, InstructionType inst_type);
+
+ static void Initialize();
+
+ static void Terminate();
+
+public:
+ EmulateInstructionLoongArch(const ArchSpec &arch)
+ : EmulateInstruction(arch) {}
+
+ llvm::StringRef GetPluginName() override { return GetPluginNameStatic(); }
+
+ bool SupportsEmulatingInstructionsOfType(InstructionType inst_type) override {
+ return SupportsThisInstructionType(inst_type);
+ }
+
+ bool SetTargetTriple(const ArchSpec &arch) override;
+ bool ReadInstruction() override;
+ bool EvaluateInstruction(uint32_t options) override;
+ bool TestEmulation(Stream *out_stream, ArchSpec &arch,
+ OptionValueDictionary *test_data) override;
+
+ llvm::Optional<RegisterInfo> GetRegisterInfo(lldb::RegisterKind reg_kind,
+ uint32_t reg_num) override;
+ lldb::addr_t ReadPC(bool *success);
+ bool WritePC(lldb::addr_t pc);
+
+private:
+ struct Opcode {
+ uint32_t mask;
+ uint32_t value;
+ bool (EmulateInstructionLoongArch::*callback)(uint32_t opcode);
+ const char *name;
+ };
+
+ Opcode *GetOpcodeForInstruction(uint32_t inst);
+
+ bool EmulateNonJMP(uint32_t inst);
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_PLUGINS_INSTRUCTION_LOONGARCH_EMULATEINSTRUCTIONLOONGARCH_H
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