syscall_desc.hh

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/*
 * Copyright (c) 2012-2013, 2015 ARM Limited
 * Copyright (c) 2015-2016 Advanced Micro Devices, Inc.
 * All rights reserved
 *
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 * not be construed as granting a license to any other intellectual
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 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
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 * modified or unmodified, in source code or in binary form.
 *
 * Copyright (c) 2003-2005 The Regents of The University of Michigan
 * All rights reserved.
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 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
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 * Authors: Steve Reinhardt
 *          Kevin Lim
 *          Brandon Potter
 */

#ifndef __SIM_SYSCALL_DESC_HH__
#define __SIM_SYSCALL_DESC_HH__

#include <string>

#include "base/types.hh"

class Process;
class SyscallReturn;
class ThreadContext;

class SyscallDesc {
  public:
    typedef SyscallReturn (*SyscallExecutor)(SyscallDesc*, int num,
                                             Process*, ThreadContext*);

    SyscallDesc(const char *name, SyscallExecutor sys_exec, int flags = 0)
        : _name(name), executor(sys_exec), _flags(flags), _warned(false)
    {
    }

    enum Flags {
        SuppressReturnValue = 1,
        WarnOnce = 2
        /* X2 = 4, // Remove these comments when the next field is added; */
        /* X3 = 8, // point is to make it obvious that this defines vector */
    };

    void doSyscall(int callnum, Process *proc, ThreadContext *tc,
                   Fault *fault);

    bool needWarning();

    bool warnOnce() const { return (_flags & WarnOnce); }

    std::string name() { return _name; }

    int getFlags() const { return _flags; }

    void setFlags(int flags) { _flags = flags; }

  private:
    std::string _name;

    SyscallExecutor executor;

    int _flags;

    bool _warned;
};

#endif // __SIM_SYSCALL_DESC_HH__