source/Utility/ARM64_DWARF_Registers.cpp

//===-- ARM64_DWARF_Registers.c ---------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include <string.h>

#include "ARM64_DWARF_Registers.h"

using namespace lldb;
using namespace lldb_private;
using namespace arm64_dwarf;

const char *
arm64_dwarf::GetRegisterName (unsigned reg_num, bool altnernate_name)
{
    if (altnernate_name)
    {
        switch (reg_num)
        {
            case fp: return "x29"; 
            case lr: return "x30"; 
            case sp: return "x31"; 
            default:
                break;
        }
        return nullptr;
    }
    
    switch (reg_num)
    {
        case x0:       return "x0";
        case x1:       return "x1";
        case x2:       return "x2";
        case x3:       return "x3";
        case x4:       return "x4";
        case x5:       return "x5";
        case x6:       return "x6";
        case x7:       return "x7";
        case x8:       return "x8";
        case x9:       return "x9";
        case x10:      return "x10";
        case x11:      return "x11";
        case x12:      return "x12";
        case x13:      return "x13";
        case x14:      return "x14";
        case x15:      return "x15";
        case x16:      return "x16";
        case x17:      return "x17";
        case x18:      return "x18";
        case x19:      return "x19";
        case x20:      return "x20";
        case x21:      return "x21";
        case x22:      return "x22";
        case x23:      return "x23";
        case x24:      return "x24";
        case x25:      return "x25";
        case x26:      return "x26";
        case x27:      return "x27";
        case x28:      return "x28";
        case fp:       return "fp";
        case lr:       return "lr";
        case sp:       return "sp";
        case pc:       return "pc";
        case cpsr:     return "cpsr";
        case v0:       return "v0";
        case v1:       return "v1";
        case v2:       return "v2";
        case v3:       return "v3";
        case v4:       return "v4";
        case v5:       return "v5";
        case v6:       return "v6";
        case v7:       return "v7";
        case v8:       return "v8";
        case v9:       return "v9";
        case v10:      return "v10";
        case v11:      return "v11";
        case v12:      return "v12";
        case v13:      return "v13";
        case v14:      return "v14";
        case v15:      return "v15";
        case v16:      return "v16";
        case v17:      return "v17";
        case v18:      return "v18";
        case v19:      return "v19";
        case v20:      return "v20";
        case v21:      return "v21";
        case v22:      return "v22";
        case v23:      return "v23";
        case v24:      return "v24";
        case v25:      return "v25";
        case v26:      return "v26";
        case v27:      return "v27";
        case v28:      return "v28";
        case v29:      return "v29";
        case v30:      return "v30";
        case v31:      return "v31";
    }
    return nullptr;
}

bool
arm64_dwarf::GetRegisterInfo (unsigned reg_num, RegisterInfo &reg_info)
{
    ::memset (&reg_info, 0, sizeof(RegisterInfo));
    ::memset (reg_info.kinds, LLDB_INVALID_REGNUM, sizeof(reg_info.kinds));
    
    if (reg_num >= x0 && reg_num <= pc)
    {
        reg_info.byte_size = 8;
        reg_info.format = eFormatHex;
        reg_info.encoding = eEncodingUint;
    }
    else if (reg_num >= v0 && reg_num <= v31)
    {
        reg_info.byte_size = 16;
        reg_info.format = eFormatVectorOfFloat32;
        reg_info.encoding = eEncodingVector;
    }
    else if (reg_num == cpsr)
    {
        reg_info.byte_size = 4;
        reg_info.format = eFormatHex;
        reg_info.encoding = eEncodingUint;
    }
    else
    {
        return false;
    }
    
    reg_info.name = arm64_dwarf::GetRegisterName (reg_num, false);
    reg_info.alt_name = arm64_dwarf::GetRegisterName (reg_num, true);
    reg_info.kinds[eRegisterKindDWARF] = reg_num;

    switch (reg_num)
    {            
    case fp: reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_FP; break;
    case lr: reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_RA; break;
    case sp: reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_SP; break;
    case pc: reg_info.kinds[eRegisterKindGeneric] = LLDB_REGNUM_GENERIC_PC; break;
    default: break;
    }
    return true;
}