---
 linuxthreads/sysdeps/i386/tls.h |   24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

--- a/linuxthreads/sysdeps/i386/tls.h
+++ b/linuxthreads/sysdeps/i386/tls.h
@@ -50,6 +50,11 @@
   uintptr_t sysinfo;
   uintptr_t stack_guard;
   uintptr_t pointer_guard;
+#ifdef __FreeBSD_kernel__
+  long gscope_flag;
+# else
+  int gscope_flag;
+# endif
 } tcbhead_t;
 
 #else /* __ASSEMBLER__ */
@@ -240,6 +245,25 @@
   ((descr)->p_header.data.pointer_guard				      \
    = THREAD_GETMEM (THREAD_SELF, p_header.data.pointer_guard))
 
+/* Get and set the global scope generation counter in the TCB head.  */
+#define THREAD_GSCOPE_FLAG_UNUSED 0
+#define THREAD_GSCOPE_FLAG_USED   1
+#define THREAD_GSCOPE_FLAG_WAIT   2
+#define THREAD_GSCOPE_RESET_FLAG() \
+  do										    \
+    { int __res;								    \
+      asm volatile ("xchgl %0, %%gs:%P1"					    \
+		    : "=r" (__res)						    \
+		    : "i" (offsetof (struct _pthread_descr_struct, p_gscope_flag)), \
+		      "0" (THREAD_GSCOPE_FLAG_UNUSED));				    \
+      if (__res == THREAD_GSCOPE_FLAG_WAIT)					    \
+	lll_futex_wake (&THREAD_SELF->p_gscope_flag, 1);			    \
+    }										    \
+  while (0)
+#define THREAD_GSCOPE_SET_FLAG() \
+  THREAD_SETMEM (THREAD_SELF, p_gscope_flag, THREAD_GSCOPE_FLAG_USED)
+#define THREAD_GSCOPE_WAIT() \
+  do { /* GL(dl_wait_lookup_done) () */ } while (0)
 
 # endif	/* HAVE_TLS_SUPPORT && (FLOATING_STACKS || !IS_IN_libpthread) */
 #endif /* __ASSEMBLER__ */