diff -Nrup a/elf/dl-close.c b/elf/dl-close.c
--- a/elf/dl-close.c	2012-01-25 21:49:58.892869984 -0700
+++ b/elf/dl-close.c	2012-01-25 21:50:22.283882509 -0700
@@ -32,6 +32,7 @@
 #include <sys/mman.h>
 #include <sysdep-cancel.h>
 #include <tls.h>
+#include <stap-probe.h>
 
 
 /* Type of the constructor functions.  */
@@ -469,6 +470,7 @@ _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)
     {
@@ -738,6 +740,7 @@ _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 a/elf/dl-load.c b/elf/dl-load.c
--- a/elf/dl-load.c	2012-01-25 21:49:58.895869986 -0700
+++ b/elf/dl-load.c	2012-01-25 21:50:22.288882511 -0700
@@ -36,6 +36,7 @@
 #include <stackinfo.h>
 #include <caller.h>
 #include <sysdep.h>
+#include <stap-probe.h>
 
 #include <dl-dst.h>
 
@@ -881,7 +882,7 @@ _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)
@@ -895,6 +896,7 @@ 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);
@@ -933,7 +935,7 @@ _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.  */
@@ -1040,6 +1042,7 @@ _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
@@ -1735,7 +1738,7 @@ 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 a/elf/dl-open.c b/elf/dl-open.c
--- a/elf/dl-open.c	2012-01-01 05:16:32.000000000 -0700
+++ b/elf/dl-open.c	2012-01-25 21:50:22.291882514 -0700
@@ -33,6 +33,7 @@
 #include <caller.h>
 #include <sysdep-cancel.h>
 #include <tls.h>
+#include <stap-probe.h>
 
 #include <dl-dst.h>
 
@@ -292,6 +293,7 @@ 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))
@@ -308,10 +310,18 @@ dl_open_worker (void *a)
   struct link_map *l = new;
   while (l->l_next)
     l = l->l_next;
+  int relocation_in_progress = 0;
   while (1)
     {
       if (! l->l_real->l_relocated)
 	{
+	  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))
 	    {
@@ -481,6 +491,10 @@ 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 a/elf/rtld.c b/elf/rtld.c
--- a/elf/rtld.c	2012-01-25 21:49:58.898869987 -0700
+++ b/elf/rtld.c	2012-01-25 21:53:42.262987201 -0700
@@ -40,6 +40,7 @@
 #include <dl-osinfo.h>
 #include <dl-procinfo.h>
 #include <tls.h>
+#include <stap-probe.h>
 #include <stackinfo.h>
 
 #include <assert.h>
@@ -1670,6 +1671,7 @@ 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.  */
@@ -2382,6 +2384,7 @@ 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.  */