KernelCoreSyscallManager.cc

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "pedigree/kernel/processor/KernelCoreSyscallManager.h"
#include "pedigree/kernel/Log.h"
#include "pedigree/kernel/process/Scheduler.h"
#include "pedigree/kernel/processor/SyscallManager.h"
#include "pedigree/kernel/processor/Syscalls.h"
#include "pedigree/kernel/processor/state.h"

KernelCoreSyscallManager KernelCoreSyscallManager::m_Instance;

KernelCoreSyscallManager::KernelCoreSyscallManager()
{
}

KernelCoreSyscallManager::~KernelCoreSyscallManager()
{
}

void KernelCoreSyscallManager::initialise()
{
    for (int i = 0; i < 16; i++)
    {
        m_Functions[i] = 0;
    }
    SyscallManager::instance().registerSyscallHandler(kernelCore, this);
}

uintptr_t KernelCoreSyscallManager::call(
    Function_t function, uintptr_t p1, uintptr_t p2, uintptr_t p3, uintptr_t p4,
    uintptr_t p5)
{
    // if (function >= serviceEnd)
    // {
    //   ERROR("KernelCoreSyscallManager: invalid function called: " << Dec <<
    //   static_cast<int>(function)); return 0;
    // }
    return SyscallManager::instance().syscall(
        kernelCore, function, p1, p2, p3, p4, p5);
}

uintptr_t KernelCoreSyscallManager::syscall(SyscallState &state)
{
    NOTICE("???");
    switch (state.getSyscallNumber())
    {
        case yield:
#ifdef THREADS
            Scheduler::instance().yield();
#endif
            return 0;
        default:
        {
            if (state.getSyscallNumber() >= 16 ||
                m_Functions[state.getSyscallNumber()] == 0)
            {
                ERROR(
                    "KernelCoreSyscallManager: invalid syscall received: "
                    << Dec << state.getSyscallNumber());
                return 0;
            }
            else
            {
                return m_Functions[state.getSyscallNumber()](state);
            }
        }
    }
}

uintptr_t KernelCoreSyscallManager::registerSyscall(
    Function_t function, SyscallCallback func)
{
    m_Functions[function] = func;
    return 0;
}