32 	int pid = os_getpid(), ppid = getppid();  in ptrace_child()  local
38 		kill(pid, SIGKILL);  in ptrace_child()
40 	kill(pid, SIGSTOP);  in ptrace_child()
48 	if (sc_result == pid)  in ptrace_child()
95 	int pid, n, status;  in start_ptraced_child()  local
99 	pid = fork();  in start_ptraced_child()
100 	if (pid == 0)  in start_ptraced_child()
102 	else if (pid < 0)  in start_ptraced_child()
105 	CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));  in start_ptraced_child()
112 	return pid;  in start_ptraced_child()
115 static void stop_ptraced_child(int pid, int exitcode)  in stop_ptraced_child()  argument
119 	if (ptrace(PTRACE_CONT, pid, 0, 0) < 0)  in stop_ptraced_child()
122 	CATCH_EINTR(n = waitpid(pid, &status, 0));  in stop_ptraced_child()
133 	int pid, n, status, count=0;  in check_sysemu()  local
136 	pid = start_ptraced_child();  in check_sysemu()
138 	if ((ptrace(PTRACE_SETOPTIONS, pid, 0,  in check_sysemu()
144 		if (ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, 0) < 0)  in check_sysemu()
146 		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));  in check_sysemu()
157 			n = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_RET_OFFSET,  in check_sysemu()
173 	stop_ptraced_child(pid, 0);  in check_sysemu()
180 	stop_ptraced_child(pid, 1);  in check_sysemu()
186 	int pid, syscall, n, status;  in check_ptrace()  local
189 	pid = start_ptraced_child();  in check_ptrace()
191 	if ((ptrace(PTRACE_SETOPTIONS, pid, 0,  in check_ptrace()
196 		if (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0)  in check_ptrace()
199 		CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));  in check_ptrace()
208 		syscall = ptrace(PTRACE_PEEKUSER, pid, PT_SYSCALL_NR_OFFSET,  in check_ptrace()
211 			n = ptrace(PTRACE_POKEUSER, pid, PT_SYSCALL_NR_OFFSET,  in check_ptrace()
219 	stop_ptraced_child(pid, 0);  in check_ptrace()
283 	int pid;  in os_early_checks()  local
295 	pid = start_ptraced_child();  in os_early_checks()
296 	if (init_pid_registers(pid))  in os_early_checks()
298 	stop_ptraced_child(pid, 1);  in os_early_checks()