C++ (Cpp) thread_change_pc примеры использования

Пример #1

Файл: signal.c Проект: Blackburn29/PsycoKernel

static int do_signal(struct pt_regs *regs)
{
	sigset_t *oldset;
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

	if (current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK)
		oldset = &current->saved_sigmask;
	else
		oldset = &current->blocked;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		struct thread_info *ti = current_thread_info();
		
		if (ti->local_flags & _TLF_RESTORE_SIGMASK) {
			ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
		}
		regs->trap = 0;
		return 0;               
	}

#ifndef CONFIG_PPC_ADV_DEBUG_REGS
	if (current->thread.dabr)
		set_dabr(current->thread.dabr);
#endif
	
	thread_change_pc(current, regs);

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	regs->trap = 0;
	if (ret) {
		block_sigmask(&ka, signr);

		current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;

		tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}

Пример #2

Файл: signal.c Проект: DerDavid/linux

static int do_signal(struct pt_regs *regs)
{
	sigset_t *oldset = sigmask_to_save();
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	/* Is there any syscall restart business here ? */
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		/* No signal to deliver -- put the saved sigmask back */
		restore_saved_sigmask();
		regs->trap = 0;
		return 0;               /* no signals delivered */
	}

#ifndef CONFIG_PPC_ADV_DEBUG_REGS
        /*
	 * Reenable the DABR before delivering the signal to
	 * user space. The DABR will have been cleared if it
	 * triggered inside the kernel.
	 */
	if (current->thread.hw_brk.address &&
		current->thread.hw_brk.type)
		set_breakpoint(&current->thread.hw_brk);
#endif
	/* Re-enable the breakpoints for the signal stack */
	thread_change_pc(current, regs);

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	regs->trap = 0;
	if (ret) {
		signal_delivered(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}

Пример #3

Файл: signal.c Проект: kprog/linux

static int do_signal(struct pt_regs *regs)
{
	sigset_t *oldset;
	siginfo_t info;
	int signr;
	struct k_sigaction ka;
	int ret;
	int is32 = is_32bit_task();

	if (current_thread_info()->local_flags & _TLF_RESTORE_SIGMASK)
		oldset = &current->saved_sigmask;
	else
		oldset = &current->blocked;

	signr = get_signal_to_deliver(&info, &ka, regs, NULL);

	/* Is there any syscall restart business here ? */
	check_syscall_restart(regs, &ka, signr > 0);

	if (signr <= 0) {
		struct thread_info *ti = current_thread_info();
		/* No signal to deliver -- put the saved sigmask back */
		if (ti->local_flags & _TLF_RESTORE_SIGMASK) {
			ti->local_flags &= ~_TLF_RESTORE_SIGMASK;
			sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
		}
		regs->trap = 0;
		return 0;               /* no signals delivered */
	}

#ifndef CONFIG_PPC_ADV_DEBUG_REGS
        /*
	 * Reenable the DABR before delivering the signal to
	 * user space. The DABR will have been cleared if it
	 * triggered inside the kernel.
	 */
	if (current->thread.dabr)
		set_dabr(current->thread.dabr);
#endif
	/* Re-enable the breakpoints for the signal stack */
	thread_change_pc(current, regs);

	if (is32) {
        	if (ka.sa.sa_flags & SA_SIGINFO)
			ret = handle_rt_signal32(signr, &ka, &info, oldset,
					regs);
		else
			ret = handle_signal32(signr, &ka, &info, oldset,
					regs);
	} else {
		ret = handle_rt_signal64(signr, &ka, &info, oldset, regs);
	}

	regs->trap = 0;
	if (ret) {
		block_sigmask(&ka, signr);

		/*
		 * A signal was successfully delivered; the saved sigmask is in
		 * its frame, and we can clear the TLF_RESTORE_SIGMASK flag.
		 */
		current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;

		/*
		 * Let tracing know that we've done the handler setup.
		 */
		tracehook_signal_handler(signr, &info, &ka, regs,
					 test_thread_flag(TIF_SINGLESTEP));
	}

	return ret;
}