[patch 2/8] Add to_use_agent in target_ops

[Yao Qi <yao@codesourcery.com>]

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As agent goes in, we need to control the agent to perform debugging
operations.  This new field in target_ops is used to control this, so
that we can implement different for remote debugging and native debugging.

-- 
Yao (齐尧)

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2012-01-13  Yao Qi  <yao@codesourcery.com>

	* target.h (struct target_ops): New field `to_use_agent'.
	(target_use_agent): New macro.
	* target.c (update_current_target): Update.
---
 gdb/target.c |    4 ++++
 gdb/target.h |    7 +++++++
 2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/gdb/target.c b/gdb/target.c
index 9aaa0ea..e1955fa 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -697,6 +697,7 @@ update_current_target (void)
       INHERIT (to_static_tracepoint_marker_at, t);
       INHERIT (to_static_tracepoint_markers_by_strid, t);
       INHERIT (to_traceframe_info, t);
+      INHERIT (to_use_agent, t);
       INHERIT (to_magic, t);
       /* Do not inherit to_memory_map.  */
       /* Do not inherit to_flash_erase.  */
@@ -924,6 +925,9 @@ update_current_target (void)
   de_fault (to_traceframe_info,
 	    (struct traceframe_info * (*) (void))
 	    tcomplain);
+  de_fault (to_use_agent,
+	    (int (*) (int))
+	    tcomplain);
   de_fault (to_execution_direction, default_execution_direction);
 
 #undef de_fault
diff --git a/gdb/target.h b/gdb/target.h
index 7d0bed1..cd3f3d4 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -795,6 +795,10 @@ struct target_ops
        re-fetching when necessary.  */
     struct traceframe_info *(*to_traceframe_info) (void);
 
+    /* Ask the target to use or not to use agent according to USE.  Return the
+       actual value of updated flag.  */
+    int (*to_use_agent) (int use);
+
     int to_magic;
     /* Need sub-structure for target machine related rather than comm related?
      */
@@ -1569,6 +1573,9 @@ extern int target_search_memory (CORE_ADDR start_addr,
 #define target_traceframe_info() \
   (*current_target.to_traceframe_info) ()
 
+#define target_use_agent(use) \
+  (*current_target.to_use_agent) (use)
+
 /* Command logging facility.  */
 
 #define target_log_command(p)						\
-- 
1.7.0.4