htl: Move cleanup stack to variable shared between libc and pthread

If libpthread gets loaded dynamically, the stack needs to already contain the
cleanup handlers of the main thread.

* htl/libc_pthread_init.c (__pthread_cleanup_stack): New per-thread variable.
* htl/Versions (libc): Add __pthread_cleanup_stack as private symbol.
* htl/pt-internal.h (struct __pthread): Remove cancelation_handlers
field.
(__pthread_cleanup_stack): Add variable declaration.
* htl/pt-alloc.c (initialize_pthread): Remove initialization of
cancelation_handlers field.
* htl/pt-cleanup.c (__pthread_get_cleanup_stack): Return the address of
__pthread_cleanup_stack instead of that of the cancelation_handlers
field.
* htl/forward.c: Include <pt-internal.h>.
(dummy_list): Remove variable.
(__pthread_get_cleanup_stack): Return the address of __pthread_cleanup_stack
instead of that of dummy_list.

1 files changed, 2 insertions, 2 deletions

diff --git a/htl/forward.c b/htl/forward.c
index dfb7b79..544e7da 100644
--- a/htl/forward.c
+++ b/htl/forward.c
@@ -23,6 +23,7 @@
 #include <pthread-functions.h>
 #include <libc-lock.h>
 #include <fork.h>
+#include <pt-internal.h>
 
 /* Pointers to the libc functions.  */
 struct pthread_functions __libc_pthread_functions attribute_hidden;
@@ -140,6 +141,5 @@ strong_alias (__pthread_setcancelstate, pthread_setcancelstate);
 
 FORWARD (pthread_setcanceltype, (int type, int *oldtype), (type, oldtype), 0)
 
-struct __pthread_cancelation_handler *dummy_list;
 FORWARD2 (__pthread_get_cleanup_stack, struct __pthread_cancelation_handler **,
-	  (void), (), return &dummy_list);
+	  (void), (), return &__pthread_cleanup_stack);