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/Log.h"
#include "pedigree/kernel/process/Scheduler.h"
#include "pedigree/kernel/processor/KernelCoreSyscallManager.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;
  }
  if (!SyscallManager::instance().registerSyscallHandler(kernelCore, this, m_Registration)) {
    FATAL("Kernel-core syscall service registration failed.");
  }
}
 
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:
#if 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;
}