source/Plugins/Process/Utility/RegisterContextPOSIX_arm.h

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

#ifndef liblldb_RegisterContextPOSIX_arm_h_
#define liblldb_RegisterContextPOSIX_arm_h_

// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Log.h"
#include "lldb/Target/RegisterContext.h"
#include "RegisterInfoInterface.h"
#include "lldb-arm-register-enums.h"

class ProcessMonitor;

class RegisterContextPOSIX_arm
  : public lldb_private::RegisterContext
{
public:
    RegisterContextPOSIX_arm (lldb_private::Thread &thread,
                            uint32_t concrete_frame_idx,
                            lldb_private::RegisterInfoInterface *register_info);

    ~RegisterContextPOSIX_arm() override;

    void
    Invalidate();

    void
    InvalidateAllRegisters() override;

    size_t
    GetRegisterCount() override;

    virtual size_t
    GetGPRSize();

    virtual unsigned
    GetRegisterSize(unsigned reg);

    virtual unsigned
    GetRegisterOffset(unsigned reg);

    const lldb_private::RegisterInfo *
    GetRegisterInfoAtIndex(size_t reg) override;

    size_t
    GetRegisterSetCount() override;

    const lldb_private::RegisterSet *
    GetRegisterSet(size_t set) override;

    const char *
    GetRegisterName(unsigned reg);

    uint32_t
    ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind, uint32_t num) override;

protected:
    struct RegInfo
    {
        uint32_t num_registers;
        uint32_t num_gpr_registers;
        uint32_t num_fpr_registers;

        uint32_t last_gpr;
        uint32_t first_fpr;
        uint32_t last_fpr;

        uint32_t first_fpr_v;
        uint32_t last_fpr_v;

        uint32_t gpr_flags;
    };

    struct QReg
    {
        uint8_t bytes[16];
    };

    struct FPU
    {
        union {
            uint32_t s[32];
            uint64_t d[32];
            QReg     q[16];  // the 128-bit NEON registers
            } floats;
        uint32_t fpscr;
    };

    uint32_t m_gpr_arm[lldb_private::k_num_gpr_registers_arm];           // 32-bit general purpose registers.
    RegInfo  m_reg_info;
    struct RegisterContextPOSIX_arm::FPU m_fpr;                            // floating-point registers including extended register sets.
    std::unique_ptr<lldb_private::RegisterInfoInterface> m_register_info_ap; // Register Info Interface (FreeBSD or Linux)

    // Determines if an extended register set is supported on the processor running the inferior process.
    virtual bool
    IsRegisterSetAvailable(size_t set_index);

    virtual const lldb_private::RegisterInfo *
    GetRegisterInfo();

    bool
    IsGPR(unsigned reg);

    bool
    IsFPR(unsigned reg);

    lldb::ByteOrder GetByteOrder();

    virtual bool ReadGPR() = 0;
    virtual bool ReadFPR() = 0;
    virtual bool WriteGPR() = 0;
    virtual bool WriteFPR() = 0;
};

#endif // liblldb_RegisterContextPOSIX_arm_h_