Exemplo n.º 1
0
Arquivo: signal.c Projeto: Artox/linux 
/*
 * OK, we're invoking a handler
 */
static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
{
	struct task_struct *tsk = current;
	sigset_t *oldset = sigmask_to_save();
	int usig = ksig->sig;
	int ret;

	/*
	 * Set up the stack frame
	 */
	if (is_compat_task()) {
		if (ksig->ka.sa.sa_flags & SA_SIGINFO)
			ret = compat_setup_rt_frame(usig, ksig, oldset, regs);
		else
			ret = compat_setup_frame(usig, ksig, oldset, regs);
	} else {
		ret = setup_rt_frame(usig, ksig, oldset, regs);
	}

	/*
	 * Check that the resulting registers are actually sane.
	 */
	ret |= !valid_user_regs(&regs->user_regs, current);

	/*
	 * Fast forward the stepping logic so we step into the signal
	 * handler.
	 */
	if (!ret)
		user_fastforward_single_step(tsk);

	signal_setup_done(ret, ksig, 0);
}
Exemplo n.º 2
0
/*
 * OK, we're invoking a handler
 */
static void handle_signal(unsigned long sig, struct k_sigaction *ka,
			  siginfo_t *info, struct pt_regs *regs)
{
	struct thread_info *thread = current_thread_info();
	struct task_struct *tsk = current;
	sigset_t *oldset = sigmask_to_save();
	int usig = sig;
	int ret;

	/*
	 * translate the signal
	 */
	if (usig < 32 && thread->exec_domain && thread->exec_domain->signal_invmap)
		usig = thread->exec_domain->signal_invmap[usig];

	/*
	 * Set up the stack frame
	 */
	if (is_compat_task()) {
		if (ka->sa.sa_flags & SA_SIGINFO)
			ret = compat_setup_rt_frame(usig, ka, info, oldset,
						    regs);
		else
			ret = compat_setup_frame(usig, ka, oldset, regs);
	} else {
		ret = setup_rt_frame(usig, ka, info, oldset, regs);
	}

	/*
	 * Check that the resulting registers are actually sane.
	 */
	ret |= !valid_user_regs(&regs->user_regs);

	if (ret != 0) {
		force_sigsegv(sig, tsk);
		return;
	}

	/*
	 * Fast forward the stepping logic so we step into the signal
	 * handler.
	 */
	user_fastforward_single_step(tsk);

	signal_delivered(sig, info, ka, regs, 0);
}