nptl: Move stack list variables into _rtld_global

Now __thread_gscope_wait (the function behind THREAD_GSCOPE_WAIT,
formerly __wait_lookup_done) can be implemented directly in ld.so,
eliminating the unprotected GL (dl_wait_lookup_done) function
pointer.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/nptl_db/td_init.c b/nptl_db/td_init.c
index 86773dcb06..79a1f90312 100644
--- a/nptl_db/td_init.c
+++ b/nptl_db/td_init.c
@@ -29,3 +29,17 @@ td_init (void)
   LOG ("td_init");
   return TD_OK;
 }
+
+bool
+__td_ta_rtld_global (td_thragent_t *ta)
+{
+  if (ta->ta_addr__rtld_global == 0
+      && td_mod_lookup (ta->ph, LD_SO, SYM__rtld_global,
+                        &ta->ta_addr__rtld_global) != PS_OK)
+    {
+      ta->ta_addr__rtld_global = (void*)-1;
+      return false;
+    }
+  else
+    return ta->ta_addr__rtld_global != (void*)-1;
+}