[S390] ptrace changes

* System call parameter and result access functions
* Add tracehook calls
* Split syscall_trace into two functions do_syscall_trace_enter and
  do_syscall_trace_exit

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index b97682040215..4f7fc3059a8e 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -24,6 +24,7 @@
 #include <linux/tty.h>
 #include <linux/personality.h>
 #include <linux/binfmts.h>
+#include <linux/tracehook.h>
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
 #include <asm/lowcore.h>
@@ -507,6 +508,12 @@ void do_signal(struct pt_regs *regs)
 			 */
 			if (current->thread.per_info.single_step)
 				set_thread_flag(TIF_SINGLE_STEP);
+
+			/*
+			 * Let tracing know that we've done the handler setup.
+			 */
+			tracehook_signal_handler(signr, &info, &ka, regs,
+					 test_thread_flag(TIF_SINGLE_STEP));
 		}
 		return;
 	}
@@ -526,3 +533,9 @@ void do_signal(struct pt_regs *regs)
 		set_thread_flag(TIF_RESTART_SVC);
 	}
 }
+
+void do_notify_resume(struct pt_regs *regs)
+{
+	clear_thread_flag(TIF_NOTIFY_RESUME);
+	tracehook_notify_resume(regs);
+}