C++ (Cpp) getStackStartPointer Examples

Example #1

File: UserProcess.cpp Project: dkales/sweb

UserProcess::UserProcess(ustl::string filename, FileSystemInfo *fs_info, ProcessRegistry *process_registry,
                         uint32 terminal_number) :
    Thread(fs_info, filename, Thread::USER_THREAD), fd_(VfsSyscall::open(filename, O_RDONLY)), process_registry_(process_registry)
{
  process_registry_->processStart(); //should also be called if you fork a process

  if (fd_ >= 0)
    loader_ = new Loader(fd_);

  if (!loader_ || !loader_->loadExecutableAndInitProcess())
  {
    debug(USERPROCESS, "Error: loading %s failed!\n", filename.c_str());
    loader_ = 0;
    kill();
    return;
  }

  size_t page_for_stack = PageManager::instance()->allocPPN();
  loader_->arch_memory_.mapPage(USER_BREAK / PAGE_SIZE - 1, page_for_stack, 1);

  ArchThreads::createUserRegisters(user_registers_, loader_->getEntryFunction(),
                                   (void*) (USER_BREAK - sizeof(pointer)),
                                   getStackStartPointer());

  ArchThreads::setAddressSpace(this, loader_->arch_memory_);

  debug(USERPROCESS, "ctor: Done loading %s\n", filename.c_str());

  if (main_console->getTerminal(terminal_number))
    setTerminal(main_console->getTerminal(terminal_number));

  switch_to_userspace_ = 1;
}

Example #2

File: Thread.cpp Project: weaondara/sweb

Thread::Thread(FileSystemInfo *working_dir, ustl::string name) :
    kernel_registers_(0), user_registers_(0), switch_to_userspace_(0), loader_(0), state_(Running),
    next_thread_in_lock_waiters_list_(0), lock_waiting_on_(0), holding_lock_list_(0), tid_(0),
    my_terminal_(0), working_dir_(working_dir), name_(name)
{
  debug(THREAD, "Thread ctor, this is %p, stack is %p, fs_info ptr: %p\n", this, kernel_stack_, working_dir_);
  ArchThreads::createKernelRegisters(kernel_registers_, (void*)threadStartHack, getStackStartPointer());
  kernel_stack_[2047] = STACK_CANARY;
  kernel_stack_[0] = STACK_CANARY;
}