int do_syscall_trace_enter()

in kernel/ptrace.c [547:572]

• 22 lines of code
• 7 McCabe index (conditional complexity)

int do_syscall_trace_enter(struct pt_regs *regs)
{
	if (regs->syscall == NO_SYSCALL)
		regs->areg[2] = -ENOSYS;

	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
	    tracehook_report_syscall_entry(regs)) {
		regs->areg[2] = -ENOSYS;
		regs->syscall = NO_SYSCALL;
		return 0;
	}

	if (regs->syscall == NO_SYSCALL ||
	    secure_computing() == -1) {
		do_syscall_trace_leave(regs);
		return 0;
	}

	if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
		trace_sys_enter(regs, syscall_get_nr(current, regs));

	audit_syscall_entry(regs->syscall, regs->areg[6],
			    regs->areg[3], regs->areg[4],
			    regs->areg[5]);
	return 1;
}