diff --git a/libthread_db/include/thread_db.h b/libthread_db/include/thread_db.h
index 9c76d40d6..1b36cb2b4 100644
--- a/libthread_db/include/thread_db.h
+++ b/libthread_db/include/thread_db.h
@@ -10,6 +10,8 @@
 #include <stdint.h>
 #include <sys/types.h>
 
+typedef void *psaddr_t;
+typedef pid_t lwpid_t;
 
 #define TD_THR_ANY_USER_FLAGS       0xffffffff
 #define TD_THR_LOWEST_PRIORITY      -20
@@ -67,6 +69,7 @@ typedef pthread_t thread_t;
 typedef struct
 {
     pid_t pid;
+    struct ps_prochandle *ph;
 } td_thragent_t;
 
 typedef struct
@@ -123,19 +126,37 @@ struct ps_prochandle;
 extern "C"{
 #endif
 
-extern td_err_e td_ta_new(struct ps_prochandle const * proc_handle, td_thragent_t ** thread_agent);
+extern td_err_e td_ta_new(struct ps_prochandle * proc_handle, td_thragent_t ** thread_agent);
+
+extern td_err_e td_ta_delete(td_thragent_t * ta);
 
 extern td_err_e td_ta_set_event(td_thragent_t const * agent, td_thr_events_t * event);
 
 extern td_err_e td_ta_event_addr(td_thragent_t const * agent, td_event_e event, td_notify_t * notify);
 
+extern td_err_e td_ta_clear_event(const td_thragent_t * ta_arg,
+				  td_thr_events_t * event);
+
 extern td_err_e td_ta_event_getmsg(td_thragent_t const * agent, td_event_msg_t * event);
 
+extern td_err_e td_ta_map_lwp2thr(td_thragent_t const * agent, lwpid_t lwpid,
+				  td_thrhandle_t *th);
+
+extern td_err_e td_thr_get_info(td_thrhandle_t const * handle,
+				td_thrinfo_t * info);
+
+extern td_err_e td_thr_event_enable(td_thrhandle_t const * handle,
+				    td_event_e event);
+
 extern td_err_e td_ta_thr_iter(td_thragent_t const * agent, td_thr_iter_f * func, void * cookie,
                                td_thr_state_e state, int32_t prio, sigset_t * sigmask, uint32_t user_flags);
 
 extern char const ** td_symbol_list(void);
 
+extern td_err_e td_thr_tls_get_addr(const td_thrhandle_t * th,
+				    psaddr_t map_address, size_t offset,
+				    psaddr_t * address);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/libthread_db/libthread_db.c b/libthread_db/libthread_db.c
index f1a78ac68..2cf4d3856 100644
--- a/libthread_db/libthread_db.c
+++ b/libthread_db/libthread_db.c
@@ -10,12 +10,7 @@
 #include <stdio.h>
 
 extern int ps_pglobal_lookup (void *, const char *obj, const char *name, void **sym_addr);
-
-struct ps_prochandle
-{
-    pid_t pid;
-};
-
+extern pid_t ps_getpid(struct ps_prochandle *ph);
 
 /*
  * This is the list of "special" symbols we care about whose addresses are
@@ -41,7 +36,7 @@ td_symbol_list(void)
 
 
 td_err_e
-td_ta_new(struct ps_prochandle const * proc_handle, td_thragent_t ** agent_out)
+td_ta_new(struct ps_prochandle * proc_handle, td_thragent_t ** agent_out)
 {
     td_thragent_t * agent;
 
@@ -50,13 +45,25 @@ td_ta_new(struct ps_prochandle const * proc_handle, td_thragent_t ** agent_out)
         return TD_MALLOC;
     }
 
-    agent->pid = proc_handle->pid;
+    agent->pid = ps_getpid(proc_handle);
+    agent->ph = proc_handle;
     *agent_out = agent;
 
     return TD_OK;
 }
 
 
+td_err_e
+td_ta_delete(td_thragent_t * ta)
+{
+    free(ta);
+    // FIXME: anything else to do?
+    return TD_OK;
+}
+
+
+/* NOTE: not used by gdb 7.0 */
+
 td_err_e
 td_ta_set_event(td_thragent_t const * agent, td_thr_events_t * events)
 {
@@ -64,8 +71,11 @@ td_ta_set_event(td_thragent_t const * agent, td_thr_events_t * events)
 }
 
 
+/* NOTE: not used by gdb 7.0 */
 static td_thrhandle_t gEventMsgHandle;
 
+/* NOTE: not used by gdb 7.0 */
+
 static int
 _event_getmsg_helper(td_thrhandle_t const * handle, void * bkpt_addr)
 {
@@ -83,6 +93,8 @@ _event_getmsg_helper(td_thrhandle_t const * handle, void * bkpt_addr)
     return 0;
 }
 
+/* NOTE: not used by gdb 7.0 */
+
 td_err_e
 td_ta_event_getmsg(td_thragent_t const * agent, td_event_msg_t * event)
 {
@@ -106,6 +118,16 @@ td_ta_event_getmsg(td_thragent_t const * agent, td_event_msg_t * event)
 }
 
 
+td_err_e
+td_ta_map_lwp2thr(td_thragent_t const * agent, lwpid_t lwpid,
+		  td_thrhandle_t *th)
+{
+    th->pid = ps_getpid(agent->ph);
+    th->tid = lwpid;
+    return TD_OK;
+}
+
+
 td_err_e
 td_thr_get_info(td_thrhandle_t const * handle, td_thrinfo_t * info)
 {
@@ -117,6 +139,8 @@ td_thr_get_info(td_thrhandle_t const * handle, td_thrinfo_t * info)
 }
 
 
+/* NOTE: not used by gdb 7.0 */
+
 td_err_e
 td_thr_event_enable(td_thrhandle_t const * handle, td_event_e event)
 {
@@ -125,6 +149,8 @@ td_thr_event_enable(td_thrhandle_t const * handle, td_event_e event)
 }
 
 
+/* NOTE: not used by gdb 7.0 */
+
 td_err_e
 td_ta_event_addr(td_thragent_t const * agent, td_event_e event, td_notify_t * notify_out)
 {
@@ -148,6 +174,15 @@ td_ta_event_addr(td_thragent_t const * agent, td_event_e event, td_notify_t * no
 }
 
 
+td_err_e
+td_ta_clear_event(const td_thragent_t * ta_arg, td_thr_events_t * event)
+{
+    /* Given that gdb 7.0 doesn't use thread events,
+       there's nothing we need to do here.  */
+    return TD_OK;
+}
+
+
 td_err_e
 td_ta_thr_iter(td_thragent_t const * agent, td_thr_iter_f * func, void * cookie,
                td_thr_state_e state, int32_t prio, sigset_t * sigmask, uint32_t user_flags)
@@ -170,8 +205,8 @@ td_ta_thr_iter(td_thragent_t const * agent, td_thr_iter_f * func, void * cookie,
             continue;
         }
         handle.tid = atoi(entry->d_name);
-        err = func(&handle, cookie);
-        if (err) {
+        if (func(&handle, cookie) != 0) {
+	    err = TD_DBERR;
             break;
         }
     }
@@ -181,3 +216,9 @@ td_ta_thr_iter(td_thragent_t const * agent, td_thr_iter_f * func, void * cookie,
     return err;
 }
 
+td_err_e
+td_thr_tls_get_addr(const td_thrhandle_t * th,
+		    psaddr_t map_address, size_t offset, psaddr_t * address)
+{
+    return TD_NOAPLIC; // FIXME: TODO
+}