1999-01-15 Fernando Nasser <fnasser@totem.to.cygnus.com>

* target.h: added entry for target queries (to_query)
          target.c: ditto.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+1999-01-15  Fernando Nasser  <fnasser@totem.to.cygnus.com>
+
+	* target.h: added entry for target queries (to_query)
+	  target.c: ditto.
+
 Thu Jan 14 18:29:17 1999  David Taylor  <taylor@texas.cygnus.com>
 
 start-sanitize-carp start-sanitize-vr4xxx

gdb/target.c

@@ -172,6 +172,9 @@ debug_to_thread_alive PARAMS ((int));
 static void
 debug_to_stop PARAMS ((void));
 
+static int
+debug_to_query PARAMS ((char, char *, char *, int *));
+
 /* Pointer to array of target architecture structures; the size of the
    array; the current index into the array; the allocated size of the 
    array.  */
@@ -237,6 +240,7 @@ struct target_ops dummy_target = {
   0,				/* to_notice_signals */
   0,				/* to_thread_alive */
   0,				/* to_stop */
+  0,				/* to_query */
   NULL,                         /* to_enable_exception_callback */
   NULL,                         /* to_get_current_exception_event */
   NULL,                         /* to_pid_to_exec_file */
@@ -502,6 +506,7 @@ cleanup_target (t)
   de_fault (to_notice_signals,		(void (*) PARAMS((int))) target_ignore);
   de_fault (to_thread_alive,		(int (*) PARAMS((int))) target_ignore);
   de_fault (to_stop,			(void (*) PARAMS((void))) target_ignore);
+  de_fault (to_query,			(int (*) PARAMS((char, char*, char *, int *))) target_ignore);
   de_fault (to_enable_exception_callback,	(struct symtab_and_line * (*) PARAMS((enum exception_event_kind, int))) nosupport_runtime);
   de_fault (to_get_current_exception_event,	(struct exception_event_record * (*) PARAMS((void))) nosupport_runtime);
 
@@ -583,6 +588,7 @@ update_current_target ()
       INHERIT (to_notice_signals, t);
       INHERIT (to_thread_alive, t);
       INHERIT (to_stop, t);
+      INHERIT (to_query, t);
       INHERIT (to_enable_exception_callback, t);
       INHERIT (to_get_current_exception_event, t);
       INHERIT (to_pid_to_exec_file, t);
@@ -2470,6 +2476,22 @@ debug_to_stop ()
   fprintf_unfiltered (gdb_stderr, "target_stop ()\n");
 }
 
+static int
+debug_to_query (type, req, resp, siz)
+  char type;
+  char *req;
+  char *resp;
+  int *siz;
+{
+  int retval;
+
+  retval = debug_target.to_query (type, req, resp, siz);
+
+  fprintf_unfiltered (stderr, "target_query (%c, %s, %s,  %d) = %d\n", type, req, resp, *siz, retval);
+
+  return retval;
+}
+
 static struct symtab_and_line *
 debug_to_enable_exception_callback (kind, enable)
   enum exception_event_kind kind;
@@ -2572,6 +2594,7 @@ setup_target_debug ()
   current_target.to_notice_signals = debug_to_notice_signals;
   current_target.to_thread_alive = debug_to_thread_alive;
   current_target.to_stop = debug_to_stop;
+  current_target.to_query = debug_to_query;
   current_target.to_enable_exception_callback = debug_to_enable_exception_callback;
   current_target.to_get_current_exception_event = debug_to_get_current_exception_event;
   current_target.to_pid_to_exec_file = debug_to_pid_to_exec_file;

gdb/target.h

@@ -355,6 +355,7 @@ struct target_ops
   void	      (*to_notice_signals) PARAMS ((int pid));
   int	      (*to_thread_alive) PARAMS ((int pid));
   void	      (*to_stop) PARAMS ((void));
+  int 	      (*to_query) PARAMS ((char, char *, char *, int *));
   struct symtab_and_line * (*to_enable_exception_callback) PARAMS ((enum exception_event_kind, int));
   struct exception_event_record * (*to_get_current_exception_event) PARAMS ((void));
   char *      (*to_pid_to_exec_file) PARAMS ((int pid));
@@ -888,6 +889,16 @@ print_section_info PARAMS ((struct target_ops *, bfd *));
 
 #define target_stop current_target.to_stop
 
+/* Queries the target side for some information.  The first argument is a
+   letter specifying the type of the query, which is used to determine who
+   should process it.  The second argument is a string that specifies which 
+   information is desired and the third is a buffer that carries back the 
+   response from the target side. The fourth parameter is the size of the
+   output buffer supplied. */
+ 
+#define	target_query(query_type, query, resp_buffer, bufffer_size)	\
+	(*current_target.to_query) (query_type, query, resp_buffer, bufffer_size)
+
 /* Get the symbol information for a breakpointable routine called when
    an exception event occurs. 
    Intended mainly for C++, and for those