* gdb/remote.c (remote_insert_hw_breakpoint): Throw exception if

there is an error inserting hardware breakpoints and use the
error message from the target.

* gdb/breakpoint.c (insert_bp_location, insert_breakpoint_locations):
Catch this exception and print the error message contained within. Do not
print the default hardware error breakpoint message in this case.

3 files changed, 55 insertions, 14 deletions

diff --git a/ChangeLog b/ChangeLog
index f1a09a1..8029883 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2012-09-12  Mike Wrighton  <wrighton@codesourcery.com>
+
+	* gdb/remote.c (remote_insert_hw_breakpoint): Throw exception if
+	there is an error inserting hardware breakpoints and use the
+	error message from the target.
+
+	* gdb/breakpoint.c (insert_bp_location, insert_breakpoint_locations):
+	Catch this exception and print the error message contained within. Do not
+	print the default hardware error breakpoint message in this case.	
+
 2012-08-26  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR binutils/4970
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index b074ecc..12f20d6 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -2375,9 +2375,12 @@ static int
 insert_bp_location (struct bp_location *bl,
 		    struct ui_file *tmp_error_stream,
 		    int *disabled_breaks,
-		    int *hw_breakpoint_error)
+		    int *hw_breakpoint_error,
+		    int *hw_bp_error_explained_already)
 {
   int val = 0;
+  char *hw_bp_err_string = NULL;
+  struct gdb_exception e;
 
   if (!should_be_inserted (bl) || (bl->inserted && !bl->needs_update))
     return 0;
@@ -2474,8 +2477,15 @@ insert_bp_location (struct bp_location *bl,
 	  || !(section_is_overlay (bl->section)))
 	{
 	  /* No overlay handling: just set the breakpoint.  */
-
-	  val = bl->owner->ops->insert_location (bl);
+	  TRY_CATCH (e, RETURN_MASK_ALL)
+	    {
+	      val = bl->owner->ops->insert_location (bl);
+	    }
+	  if (e.reason < 0)
+	    {
+	      val = 1;
+	      hw_bp_err_string = (char *) e.message;
+	    }
 	}
       else
 	{
@@ -2509,7 +2519,15 @@ insert_bp_location (struct bp_location *bl,
 	  if (section_is_mapped (bl->section))
 	    {
 	      /* Yes.  This overlay section is mapped into memory.  */
-	      val = bl->owner->ops->insert_location (bl);
+	      TRY_CATCH (e, RETURN_MASK_ALL)
+	        {
+	          val = bl->owner->ops->insert_location (bl);
+	        }
+	      if (e.reason < 0)
+	        {
+	          val = 1;
+	          hw_bp_err_string = (char *) e.message;
+	        }
 	    }
 	  else
 	    {
@@ -2545,11 +2563,13 @@ insert_bp_location (struct bp_location *bl,
 	    {
 	      if (bl->loc_type == bp_loc_hardware_breakpoint)
 		{
-		  *hw_breakpoint_error = 1;
-		  fprintf_unfiltered (tmp_error_stream,
-				      "Cannot insert hardware "
-				      "breakpoint %d.\n",
-				      bl->owner->number);
+                  *hw_breakpoint_error = 1;
+                  *hw_bp_error_explained_already = hw_bp_err_string != NULL;
+                  fprintf_unfiltered (tmp_error_stream,
+                                      "Cannot insert hardware breakpoint %d%s",
+                                      bl->owner->number, hw_bp_err_string ? ":" : ".\n");
+                  if (hw_bp_err_string)
+                    fprintf_unfiltered (tmp_error_stream, "%s.\n", hw_bp_err_string);
 		}
 	      else
 		{
@@ -2741,6 +2761,7 @@ update_inserted_breakpoint_locations (void)
   int val = 0;
   int disabled_breaks = 0;
   int hw_breakpoint_error = 0;
+  int hw_bp_details_reported = 0;
 
   struct ui_file *tmp_error_stream = mem_fileopen ();
   struct cleanup *cleanups = make_cleanup_ui_file_delete (tmp_error_stream);
@@ -2775,7 +2796,7 @@ update_inserted_breakpoint_locations (void)
 	continue;
 
       val = insert_bp_location (bl, tmp_error_stream, &disabled_breaks,
-				    &hw_breakpoint_error);
+				    &hw_breakpoint_error, &hw_bp_details_reported);
       if (val)
 	error_flag = val;
     }
@@ -2800,6 +2821,7 @@ insert_breakpoint_locations (void)
   int val = 0;
   int disabled_breaks = 0;
   int hw_breakpoint_error = 0;
+  int hw_bp_error_explained_already = 0;
 
   struct ui_file *tmp_error_stream = mem_fileopen ();
   struct cleanup *cleanups = make_cleanup_ui_file_delete (tmp_error_stream);
@@ -2833,7 +2855,7 @@ insert_breakpoint_locations (void)
 	continue;
 
       val = insert_bp_location (bl, tmp_error_stream, &disabled_breaks,
-				    &hw_breakpoint_error);
+				    &hw_breakpoint_error, &hw_bp_error_explained_already);
       if (val)
 	error_flag = val;
     }
@@ -2878,7 +2900,7 @@ insert_breakpoint_locations (void)
     {
       /* If a hardware breakpoint or watchpoint was inserted, add a
          message about possibly exhausted resources.  */
-      if (hw_breakpoint_error)
+      if (hw_breakpoint_error && !hw_bp_error_explained_already)
 	{
 	  fprintf_unfiltered (tmp_error_stream, 
 			      "Could not insert hardware breakpoints:\n\
@@ -2943,7 +2965,7 @@ reattach_breakpoints (int pid)
   struct bp_location *bl, **blp_tmp;
   int val;
   struct ui_file *tmp_error_stream;
-  int dummy1 = 0, dummy2 = 0;
+  int dummy1 = 0, dummy2 = 0, dummy3 = 0;
   struct inferior *inf;
   struct thread_info *tp;
 
@@ -2967,7 +2989,7 @@ reattach_breakpoints (int pid)
     if (bl->inserted)
       {
 	bl->inserted = 0;
-	val = insert_bp_location (bl, tmp_error_stream, &dummy1, &dummy2);
+	val = insert_bp_location (bl, tmp_error_stream, &dummy1, &dummy2, &dummy3);
 	if (val != 0)
 	  {
 	    do_cleanups (old_chain);
diff --git a/gdb/remote.c b/gdb/remote.c
index 528f374..a3309c7 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -7026,6 +7026,7 @@ putpkt_binary (char *buf, int cnt)
   int ch;
   int tcount = 0;
   char *p;
+  char *message;
 
   /* Catch cases like trying to read memory or listing threads while
      we're waiting for a stop reply.  The remote server wouldn't be
@@ -8181,6 +8182,7 @@ remote_insert_hw_breakpoint (struct gdbarch *gdbarch,
   CORE_ADDR addr;
   struct remote_state *rs;
   char *p, *endbuf;
+  char *message;
 
   /* The length field should be set to the size of a breakpoint
      instruction, even though we aren't inserting one ourselves.  */
@@ -8215,6 +8217,13 @@ remote_insert_hw_breakpoint (struct gdbarch *gdbarch,
   switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
     {
     case PACKET_ERROR:
+      if (rs->buf[1] == '.')
+        {
+          message = strchr (rs->buf + 2, '.');
+          if (message)
+            error ("Remote failure reply: %s", message + 1);
+        }
+      return -1;
     case PACKET_UNKNOWN:
       return -1;
     case PACKET_OK: