xref: /freebsd-10.1-release/contrib/llvm/tools/lldb/source/Plugins/Process/POSIX/RegisterContextPOSIX.h

//===-- RegisterContextPOSIX.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_H_
#define liblldb_RegisterContextPOSIX_H_

// C Includes
// C++ Includes
// Other libraries and framework includes
#include "lldb/Core/ArchSpec.h"
#include "lldb/Target/RegisterContext.h"

//------------------------------------------------------------------------------
/// @class POSIXBreakpointProtocol
///
/// @brief Extends RegisterClass with a few virtual operations useful on POSIX.
class POSIXBreakpointProtocol
{
public:
    POSIXBreakpointProtocol()
        { m_watchpoints_initialized = false; }
    virtual ~POSIXBreakpointProtocol() {}

    /// Updates the register state of the associated thread after hitting a
    /// breakpoint (if that make sense for the architecture).  Default
    /// implementation simply returns true for architectures which do not
    /// require any update.
    ///
    /// @return
    ///    True if the operation succeeded and false otherwise.
    virtual bool UpdateAfterBreakpoint() = 0;

    /// Determines the index in lldb's register file given a kernel byte offset.
    virtual unsigned
    GetRegisterIndexFromOffset(unsigned offset) = 0;

    // Checks to see if a watchpoint specified by hw_index caused the inferior
    // to stop.
    virtual bool
    IsWatchpointHit (uint32_t hw_index) = 0;

    // Resets any watchpoints that have been hit.
    virtual bool
    ClearWatchpointHits () = 0;

    // Returns the watchpoint address associated with a watchpoint hardware
    // index.
    virtual lldb::addr_t
    GetWatchpointAddress (uint32_t hw_index) = 0;

    virtual bool
    IsWatchpointVacant (uint32_t hw_index) = 0;

    virtual bool
    SetHardwareWatchpointWithIndex (lldb::addr_t addr, size_t size,
                                    bool read, bool write,
                                    uint32_t hw_index) = 0;

    // From lldb_private::RegisterContext
    virtual uint32_t
    NumSupportedHardwareWatchpoints () = 0;

    // Force m_watchpoints_initialized to TRUE
    void
    ForceWatchpointsInitialized () {m_watchpoints_initialized = true;}

protected:
    bool m_watchpoints_initialized;
};

//------------------------------------------------------------------------------
/// @class RegisterInfoInterface
///
/// @brief RegisterInfo interface to patch RegisterInfo structure for archs.
class RegisterInfoInterface
{
public:
    RegisterInfoInterface(const lldb_private::ArchSpec& target_arch) : m_target_arch(target_arch) {}
    virtual ~RegisterInfoInterface () {}

    virtual size_t
    GetGPRSize () = 0;

    virtual const lldb_private::RegisterInfo *
    GetRegisterInfo () = 0;

public:
    lldb_private::ArchSpec m_target_arch;
};

#endif // #ifndef liblldb_RegisterContextPOSIX_H_