Exemple #1
0
/* Can I use safe functions in a interupt handler? */
static void sigsegv_handler(int signum)
{
	if (current_engine.stack_protected) {
		unprotect_stack(&current_engine);
		signal_handler(ALSSIG_STACK_OVERFLOW);
	} else {
		signal(signum, SIG_DFL);
	}
}
Exemple #2
0
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();
}