[PATCH] Fix --with-tls --without-__thread on !TLS_INIT_TP_EXPENSIVE arches

[Jakub Jelinek <jakub at redhat dot com>]

Hi!

If TLS_INIT_TP_EXPENSIVE is not defined or zero, rtld.c sets up TLS
even if no PT_TLS segments were found, but this means GL(dl_tls_max_dtv_idx)
is still 0 and thus either dl-load.c or pthread.c would try to initialize
it once again.
GL(dl_tls_dtv_slotinfo_list) != NULL is a better check.
Sorry for not finding this earlier, was building with -DNDEBUG=1.

2003-01-16  Jakub Jelinek  <jakub@redhat.com>

	* elf/dl-load.c (_dl_map_object_from_fd): Use
	GL(dl_tls_dtv_slotinfo_list) != NULL to check whether TLS has
	been already initialized.
linuxthreads/
	* pthread.c (_pthread_initialize_minimal): Use
	GL(dl_tls_dtv_slotinfo_list) != NULL to check whether TLS has
	been already initialized.

--- libc/elf/dl-load.c.jj	2002-12-10 15:08:25.000000000 +0100
+++ libc/elf/dl-load.c	2003-01-16 11:18:41.000000000 +0100
@@ -953,9 +953,9 @@ _dl_map_object_from_fd (const char *name
 	  /* If not loading the initial set of shared libraries,
 	     check whether we should permit loading a TLS segment.  */
 	  if (__builtin_expect (l->l_type == lt_library, 1)
-	      /* If GL(dl_tls_max_dtv_idx) == 0, then rtld.c did not
-		 set up TLS data structures, so don't use them now.  */
-	      || __builtin_expect (GL(dl_tls_max_dtv_idx), 1) != 0)
+	      /* If GL(dl_tls_dtv_slotinfo_list) == NULL, then rtld.c did
+		 not set up TLS data structures, so don't use them now.  */
+	      || __builtin_expect (GL(dl_tls_dtv_slotinfo_list) != NULL, 1))
 	    {
 	      /* Assign the next available module ID.  */
 	      l->l_tls_modid = _dl_next_tls_modid ();
--- libc/linuxthreads/pthread.c.jj	2003-01-13 13:57:09.000000000 +0100
+++ libc/linuxthreads/pthread.c	2003-01-16 11:23:03.000000000 +0100
@@ -305,7 +305,7 @@ __pthread_initialize_minimal(void)
      taken care of initializing the TLS data structures.  */
   __libc_setup_tls (TLS_TCB_SIZE, TLS_TCB_ALIGN);
 # elif !USE___THREAD
-  if (__builtin_expect (GL(dl_tls_max_dtv_idx) == 0, 0))
+  if (__builtin_expect (GL(dl_tls_dtv_slotinfo_list) == NULL, 0))
     {
       tcbhead_t *tcbp;
 

	Jakub