[PATCH] gdbserver/s390: Advertise Z0 packet support.

["Marcin Kościelnicki" <koriakin@0x04.net>]

This is necessary for upcoming tracepoint support - otherwise, setting
a tracepoint and a breakpoint on the same address will fail, since gdbserver
won't know about gdb's breakpoint.

Tested on s390x-ibm-linux-gnu and s390-ibm-linux-gnu, RHEL 7.2.

gdb/gdbserver/ChangeLog:

	* linux-s390-low.c (s390_supports_z_point_type): New function.
	(struct linux_target_ops): Wire s390_supports_z_point_type in.
---
I've added missing comment.  Ping?

 gdb/gdbserver/ChangeLog        |  5 +++++
 gdb/gdbserver/linux-s390-low.c | 18 +++++++++++++++++-
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index fd49585..254341c 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,5 +1,10 @@
 2016-02-07  Marcin Kościelnicki  <koriakin@0x04.net>
 
+	* linux-s390-low.c (s390_supports_z_point_type): New function.
+	(struct linux_target_ops): Wire s390_supports_z_point_type in.
+
+2016-02-07  Marcin Kościelnicki  <koriakin@0x04.net>
+
 	* tracepoint.c (struct tracepoint_action_ops): Removed.
 	(struct tracepoint_action): Removed ops field.
 	(struct collect_registers_action): Removed.
diff --git a/gdb/gdbserver/linux-s390-low.c b/gdb/gdbserver/linux-s390-low.c
index 63728aa..533e384 100644
--- a/gdb/gdbserver/linux-s390-low.c
+++ b/gdb/gdbserver/linux-s390-low.c
@@ -609,6 +609,22 @@ s390_breakpoint_at (CORE_ADDR pc)
   return memcmp (c, s390_breakpoint, s390_breakpoint_len) == 0;
 }
 
+/* Breakpoint/Watchpoint support.  */
+
+/* The "supports_z_point_type" linux_target_ops method.  */
+
+static int
+s390_supports_z_point_type (char z_type)
+{
+  switch (z_type)
+    {
+    case Z_PACKET_SW_BP:
+      return 1;
+    default:
+      return 0;
+    }
+}
+
 /* Support for hardware single step.  */
 
 static int
@@ -687,7 +703,7 @@ struct linux_target_ops the_low_target = {
   NULL,
   s390_breakpoint_len,
   s390_breakpoint_at,
-  NULL,  /* supports_z_point_type */
+  s390_supports_z_point_type,
   NULL,
   NULL,
   NULL,
-- 
2.7.0