C++ (Cpp) force_flush_allの例

コード例 #1

ファイル: process_kern.c プロジェクト: 420GrayFox/dsl-n55u-bender

static void new_thread_handler(int sig)
{
	unsigned long disable;
	int (*fn)(void *);
	void *arg;

	fn = current->thread.request.u.thread.proc;
	arg = current->thread.request.u.thread.arg;

	UPT_SC(&current->thread.regs.regs) = (void *) (&sig + 1);
	disable = (1 << (SIGVTALRM - 1)) | (1 << (SIGALRM - 1)) |
		(1 << (SIGIO - 1)) | (1 << (SIGPROF - 1));
	SC_SIGMASK(UPT_SC(&current->thread.regs.regs)) &= ~disable;

	suspend_new_thread(current->thread.mode.tt.switch_pipe[0]);

	force_flush_all();
	if(current->thread.prev_sched != NULL)
		schedule_tail(current->thread.prev_sched);
	current->thread.prev_sched = NULL;

	init_new_thread_signals();
	enable_timer();
	free_page(current->thread.temp_stack);
	set_cmdline("(kernel thread)");

	change_sig(SIGUSR1, 1);
	change_sig(SIGPROF, 1);
	local_irq_enable();
	if(!run_kernel_thread(fn, arg, &current->thread.exec_buf))
		do_exit(0);

	/* XXX No set_user_mode here because a newly execed process will
	 * immediately segfault on its non-existent IP, coming straight back
	 * to the signal handler, which will call set_user_mode on its way
	 * out.  This should probably change since it's confusing.
	 */
}

コード例 #2

ファイル: process_kern.c プロジェクト: 420GrayFox/dsl-n55u-bender

void finish_fork_handler(int sig)
{
 	UPT_SC(&current->thread.regs.regs) = (void *) (&sig + 1);
	suspend_new_thread(current->thread.mode.tt.switch_pipe[0]);

	force_flush_all();
	if(current->thread.prev_sched != NULL)
		schedule_tail(current->thread.prev_sched);
	current->thread.prev_sched = NULL;

	enable_timer();
	change_sig(SIGVTALRM, 1);
	local_irq_enable();
	if(current->mm != current->parent->mm)
		protect_memory(uml_reserved, high_physmem - uml_reserved, 1, 
			       1, 0, 1);
	task_protections((unsigned long) current_thread);

	free_page(current->thread.temp_stack);
	local_irq_disable();
	change_sig(SIGUSR1, 0);
	set_user_mode(current);
}

コード例 #3

ファイル: process_kern.c プロジェクト: FatSunHYS/OSCourseDesign

void fork_handler(int sig)
{
	os_usr1_signal(1);
	thread_wait(&current->thread.mode.skas.switch_buf,
		    current->thread.mode.skas.fork_buf);
  	
	force_flush_all();
	if(current->thread.prev_sched == NULL)
		panic("blech");

	schedule_tail(current->thread.prev_sched);

	/* XXX: if interrupt_end() calls schedule, this call to
	 * arch_switch_to_skas isn't needed. We could want to apply this to
	 * improve performance. -bb */
	arch_switch_to_skas(current->thread.prev_sched, current);

	current->thread.prev_sched = NULL;

/* Handle any immediate reschedules or signals */
	interrupt_end();

	userspace(&current->thread.regs.regs);
}

コード例 #4

ファイル: exec_kern.c プロジェクト: 3sOx/asuswrt-merlin

void flush_thread_tt(void)
{
	unsigned long stack;
	int new_pid;

	stack = alloc_stack(0, 0);
	if(stack == 0){
		printk(KERN_ERR 
		       "flush_thread : failed to allocate temporary stack\n");
		do_exit(SIGKILL);
	}
		
	new_pid = start_fork_tramp(task_stack_page(current), stack, 0, exec_tramp);
	if(new_pid < 0){
		printk(KERN_ERR 
		       "flush_thread : new thread failed, errno = %d\n",
		       -new_pid);
		do_exit(SIGKILL);
	}

	if(current_thread->cpu == 0)
		forward_interrupts(new_pid);
	current->thread.request.op = OP_EXEC;
	current->thread.request.u.exec.pid = new_pid;
	unprotect_stack((unsigned long) current_thread);
	os_usr1_process(os_getpid());
	change_sig(SIGUSR1, 1);

	change_sig(SIGUSR1, 0);
	enable_timer();
	free_page(stack);
	protect_memory(uml_reserved, high_physmem - uml_reserved, 1, 1, 0, 1);
	stack_protections((unsigned long) current_thread);
	force_flush_all();
	unblock_signals();
}