diff -Nrup c/elf/dl-close.c d/elf/dl-close.c
--- c/elf/dl-close.c	2012-05-21 00:08:02.410897531 -0600
+++ d/elf/dl-close.c	2012-05-21 00:08:40.874716006 -0600
@@ -31,6 +31,7 @@
 #include <sys/mman.h>
 #include <sysdep-cancel.h>
 #include <tls.h>
+#include <stap-probe.h>
 
 
 /* Type of the constructor functions.  */
@@ -468,6 +469,7 @@ _dl_close_worker (struct link_map *map)
   struct r_debug *r = _dl_debug_initialize (0, nsid);
   r->r_state = RT_DELETE;
   _dl_debug_state ();
+  LIBC_PROBE (rtld_unmap_start, 2, nsid, r);
 
   if (unload_global)
     {
@@ -737,6 +739,7 @@ _dl_close_worker (struct link_map *map)
   /* Notify the debugger those objects are finalized and gone.  */
   r->r_state = RT_CONSISTENT;
   _dl_debug_state ();
+  LIBC_PROBE (rtld_unmap_complete, 2, nsid, r);
 
   /* Recheck if we need to retry, release the lock.  */
  out:
diff -Nrup c/elf/dl-load.c d/elf/dl-load.c
--- c/elf/dl-load.c	2012-05-21 00:08:02.219898432 -0600
+++ d/elf/dl-load.c	2012-05-21 00:08:40.876715997 -0600
@@ -35,6 +35,7 @@
 #include <stackinfo.h>
 #include <caller.h>
 #include <sysdep.h>
+#include <stap-probe.h>
 
 #include <dl-dst.h>
 
@@ -880,7 +881,7 @@ _dl_init_paths (const char *llp)
 static void
 __attribute__ ((noreturn, noinline))
 lose (int code, int fd, const char *name, char *realname, struct link_map *l,
-      const char *msg, struct r_debug *r)
+      const char *msg, struct r_debug *r, Lmid_t nsid)
 {
   /* The file might already be closed.  */
   if (fd != -1)
@@ -894,6 +895,7 @@ lose (int code, int fd, const char *name
     {
       r->r_state = RT_CONSISTENT;
       _dl_debug_state ();
+      LIBC_PROBE (rtld_map_complete, 2, nsid, r);
     }
 
   _dl_signal_error (code, name, NULL, msg);
@@ -932,7 +934,7 @@ _dl_map_object_from_fd (const char *name
       errval = errno;
     call_lose:
       lose (errval, fd, name, realname, l, errstring,
-	    make_consistent ? r : NULL);
+	    make_consistent ? r : NULL, nsid);
     }
 
   /* Look again to see if the real name matched another already loaded.  */
@@ -1039,6 +1041,7 @@ _dl_map_object_from_fd (const char *name
 	 linking has not been used before.  */
       r->r_state = RT_ADD;
       _dl_debug_state ();
+      LIBC_PROBE (rtld_map_start, 2, nsid, r);
       make_consistent = true;
     }
   else
@@ -1734,7 +1737,7 @@ open_verify (const char *name, struct fi
 	      name = strdupa (realname);
 	      free (realname);
 	    }
-	  lose (errval, fd, name, NULL, NULL, errstring, NULL);
+	  lose (errval, fd, name, NULL, NULL, errstring, NULL, 0);
 	}
 
       /* See whether the ELF header is what we expect.  */
diff -Nrup c/elf/dl-open.c d/elf/dl-open.c
--- c/elf/dl-open.c	2012-05-20 19:47:38.000000000 -0600
+++ d/elf/dl-open.c	2012-05-21 00:11:29.229920776 -0600
@@ -32,6 +32,7 @@
 #include <caller.h>
 #include <sysdep-cancel.h>
 #include <tls.h>
+#include <stap-probe.h>
 
 #include <dl-dst.h>
 
@@ -291,6 +292,7 @@ dl_open_worker (void *a)
   struct r_debug *r = _dl_debug_initialize (0, args->nsid);
   r->r_state = RT_CONSISTENT;
   _dl_debug_state ();
+  LIBC_PROBE (rtld_map_complete, 2, args->nsid, r);
 
   /* Print scope information.  */
   if (__builtin_expect (GLRO(dl_debug_mask) & DL_DEBUG_SCOPES, 0))
@@ -376,10 +378,19 @@ dl_open_worker (void *a)
 	}
     }
 
+  int relocation_in_progress = 0;
+
   for (size_t i = nmaps; i-- > 0; )
     {
       l = maps[i];
 
+      if (! relocation_in_progress)
+	{
+	  /* Notify the debugger that relocations are about to happen.  */
+	  LIBC_PROBE (rtld_reloc_start, 2, args->nsid, r);
+	  relocation_in_progress = 1;
+	}
+
 #ifdef SHARED
       if (__builtin_expect (GLRO(dl_profile) != NULL, 0))
 	{
@@ -544,6 +555,10 @@ cannot load any more object with static
 	}
     }
 
+  /* Notify the debugger all new objects have been relocated.  */
+  if (relocation_in_progress)
+    LIBC_PROBE (rtld_reloc_complete, 2, args->nsid, r);
+
   /* Run the initializer functions of new objects.  */
   _dl_init (new, args->argc, args->argv, args->env);
 
diff -Nrup c/elf/rtld.c d/elf/rtld.c
--- c/elf/rtld.c	2012-05-21 00:08:02.415897505 -0600
+++ d/elf/rtld.c	2012-05-21 00:08:40.917715803 -0600
@@ -39,6 +39,7 @@
 #include <dl-osinfo.h>
 #include <dl-procinfo.h>
 #include <tls.h>
+#include <stap-probe.h>
 #include <stackinfo.h>
 
 #include <assert.h>
@@ -1681,6 +1682,7 @@ ERROR: ld.so: object '%s' cannot be load
   /* We start adding objects.  */
   r->r_state = RT_ADD;
   _dl_debug_state ();
+  LIBC_PROBE (rtld_init_start, 2, LM_ID_BASE, r);
 
   /* Auditing checkpoint: we are ready to signal that the initial map
      is being constructed.  */
@@ -2398,6 +2400,7 @@ ERROR: ld.so: object '%s' cannot be load
   r = _dl_debug_initialize (0, LM_ID_BASE);
   r->r_state = RT_CONSISTENT;
   _dl_debug_state ();
+  LIBC_PROBE (rtld_init_complete, 2, LM_ID_BASE, r);
 
 #ifndef MAP_COPY
   /* We must munmap() the cache file.  */