//===-- ABISysV_msp430.cpp --------------------------------------*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "ABISysV_msp430.h" #include "lldb/Core/Module.h" #include "lldb/Core/PluginManager.h" #include "lldb/Core/Value.h" #include "lldb/Symbol/UnwindPlan.h" #include "lldb/Target/Process.h" #include "lldb/Target/RegisterContext.h" #include "lldb/Target/StackFrame.h" #include "lldb/Target/Target.h" #include "lldb/Target/Thread.h" #include "lldb/Utility/ConstString.h" #include "lldb/Utility/DataExtractor.h" #include "lldb/Utility/Log.h" #include "lldb/Utility/RegisterValue.h" #include "lldb/ValueObject/ValueObjectConstResult.h" #include "lldb/ValueObject/ValueObjectMemory.h" #include "lldb/ValueObject/ValueObjectRegister.h" #include "llvm/IR/DerivedTypes.h" #include "llvm/TargetParser/Triple.h" using namespace lldb; using namespace lldb_private; LLDB_PLUGIN_DEFINE_ADV(ABISysV_msp430, ABIMSP430) enum dwarf_regnums { dwarf_pc = 0, dwarf_sp, dwarf_r2, dwarf_r3, dwarf_fp, dwarf_r5, dwarf_r6, dwarf_r7, dwarf_r8, dwarf_r9, dwarf_r10, dwarf_r11, dwarf_r12, dwarf_r13, dwarf_r14, dwarf_r15, }; static const RegisterInfo g_register_infos[] = { {"r0", "pc", 2, 0, eEncodingUint, eFormatHex, {dwarf_pc, dwarf_pc, LLDB_REGNUM_GENERIC_PC, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r1", "sp", 2, 0, eEncodingUint, eFormatHex, {dwarf_sp, dwarf_sp, LLDB_REGNUM_GENERIC_SP, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r2", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r2, dwarf_r2, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r3", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r3, dwarf_r3, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r4", "fp", 2, 0, eEncodingUint, eFormatHex, {dwarf_fp, dwarf_fp, LLDB_REGNUM_GENERIC_FP, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r5", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r5, dwarf_r5, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r6", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r6, dwarf_r6, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r7", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r7, dwarf_r7, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r8", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r8, dwarf_r8, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r9", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r9, dwarf_r9, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r10", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r10, dwarf_r10, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r11", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r11, dwarf_r11, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r12", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r12, dwarf_r12, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r13", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r13, dwarf_r13, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r14", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r14, dwarf_r14, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }, {"r15", "", 2, 0, eEncodingUint, eFormatHex, {dwarf_r15, dwarf_r15, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM, LLDB_INVALID_REGNUM}, nullptr, nullptr, nullptr, }}; static const uint32_t k_num_register_infos = sizeof(g_register_infos) / sizeof(RegisterInfo); const lldb_private::RegisterInfo * ABISysV_msp430::GetRegisterInfoArray(uint32_t &count) { // Make the C-string names and alt_names for the register infos into const // C-string values by having the ConstString unique the names in the global // constant C-string pool. count = k_num_register_infos; return g_register_infos; } size_t ABISysV_msp430::GetRedZoneSize() const { return 0; } //------------------------------------------------------------------ // Static Functions //------------------------------------------------------------------ ABISP ABISysV_msp430::CreateInstance(lldb::ProcessSP process_sp, const ArchSpec &arch) { if (arch.GetTriple().getArch() == llvm::Triple::msp430) { return ABISP( new ABISysV_msp430(std::move(process_sp), MakeMCRegisterInfo(arch))); } return ABISP(); } bool ABISysV_msp430::PrepareTrivialCall(Thread &thread, lldb::addr_t sp, lldb::addr_t pc, lldb::addr_t ra, llvm::ArrayRef args) const { // we don't use the traditional trivial call specialized for jit return false; } bool ABISysV_msp430::GetArgumentValues(Thread &thread, ValueList &values) const { return false; } Status ABISysV_msp430::SetReturnValueObject(lldb::StackFrameSP &frame_sp, lldb::ValueObjectSP &new_value_sp) { return Status(); } ValueObjectSP ABISysV_msp430::GetReturnValueObjectSimple( Thread &thread, CompilerType &return_compiler_type) const { ValueObjectSP return_valobj_sp; return return_valobj_sp; } ValueObjectSP ABISysV_msp430::GetReturnValueObjectImpl( Thread &thread, CompilerType &return_compiler_type) const { ValueObjectSP return_valobj_sp; return return_valobj_sp; } // called when we are on the first instruction of a new function UnwindPlanSP ABISysV_msp430::CreateFunctionEntryUnwindPlan() { uint32_t sp_reg_num = dwarf_sp; uint32_t pc_reg_num = dwarf_pc; UnwindPlan::Row row; row.GetCFAValue().SetIsRegisterPlusOffset(sp_reg_num, 2); row.SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, -2, true); row.SetRegisterLocationToIsCFAPlusOffset(sp_reg_num, 0, true); auto plan_sp = std::make_shared(eRegisterKindDWARF); plan_sp->AppendRow(std::move(row)); plan_sp->SetSourceName("msp430 at-func-entry default"); plan_sp->SetSourcedFromCompiler(eLazyBoolNo); return plan_sp; } UnwindPlanSP ABISysV_msp430::CreateDefaultUnwindPlan() { uint32_t fp_reg_num = dwarf_fp; uint32_t sp_reg_num = dwarf_sp; uint32_t pc_reg_num = dwarf_pc; UnwindPlan::Row row; row.GetCFAValue().SetIsRegisterPlusOffset(sp_reg_num, 2); row.SetRegisterLocationToAtCFAPlusOffset(pc_reg_num, -2, true); row.SetRegisterLocationToIsCFAPlusOffset(sp_reg_num, 0, true); row.SetRegisterLocationToUnspecified(fp_reg_num, true); auto plan_sp = std::make_shared(eRegisterKindDWARF); plan_sp->AppendRow(std::move(row)); plan_sp->SetSourceName("msp430 default unwind plan"); plan_sp->SetSourcedFromCompiler(eLazyBoolNo); plan_sp->SetUnwindPlanValidAtAllInstructions(eLazyBoolNo); return plan_sp; } bool ABISysV_msp430::RegisterIsVolatile(const RegisterInfo *reg_info) { return !RegisterIsCalleeSaved(reg_info); } bool ABISysV_msp430::RegisterIsCalleeSaved(const RegisterInfo *reg_info) { int reg = ((reg_info->byte_offset) / 2); bool save = (reg >= 4) && (reg <= 10); return save; } void ABISysV_msp430::Initialize(void) { PluginManager::RegisterPlugin( GetPluginNameStatic(), "System V ABI for msp430 targets", CreateInstance); } void ABISysV_msp430::Terminate(void) { PluginManager::UnregisterPlugin(CreateInstance); }