(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 8 insertions, 59 deletions

diff --git a/nptl/sysdeps/powerpc/tls.h b/nptl/sysdeps/powerpc/tls.h
index ad5698c6f8..ce7f5bd53d 100644
--- a/nptl/sysdeps/powerpc/tls.h
+++ b/nptl/sysdeps/powerpc/tls.h
@@ -1,5 +1,5 @@
 /* Definition for thread-local data handling.  NPTL/PowerPC version.
-   Copyright (C) 2003, 2005, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -23,7 +23,6 @@
 # include <dl-sysdep.h>
 
 #ifndef __ASSEMBLER__
-# include <stdbool.h>
 # include <stddef.h>
 # include <stdint.h>
 
@@ -31,11 +30,7 @@
 typedef union dtv
 {
   size_t counter;
-  struct
-  {
-    void *val;
-    bool is_static;
-  } pointer;
+  void *pointer;
 } dtv_t;
 
 #else /* __ASSEMBLER__ */
@@ -65,13 +60,11 @@ typedef union dtv
 /* Get the thread descriptor definition.  */
 # include <nptl/descr.h>
 
-/* The stack_guard is accessed directly by GCC -fstack-protector code,
-   so it is a part of public ABI.  The dtv and pointer_guard fields
-   are private.  */
+/* This layout is actually wholly private and not affected by the ABI.
+   Nor does it overlap the pthread data structure, so we need nothing
+   extra here at all.  */
 typedef struct
 {
-  uintptr_t pointer_guard;
-  uintptr_t stack_guard;
   dtv_t *dtv;
 } tcbhead_t;
 
@@ -129,7 +122,7 @@ register void *__thread_register __asm__ ("r13");
 
 /* Return the address of the dtv for the current thread.  */
 # define THREAD_DTV() \
-    (((tcbhead_t *) (__thread_register - TLS_TCB_OFFSET))[-1].dtv)
+     (((tcbhead_t *) (__thread_register - TLS_TCB_OFFSET))[-1].dtv)
 
 /* Return the thread descriptor for the current thread.  */
 # define THREAD_SELF \
@@ -138,9 +131,9 @@ register void *__thread_register __asm__ ("r13");
 
 /* Magic for libthread_db to know how to do THREAD_SELF.  */
 # define DB_THREAD_SELF							      \
-  REGISTER (32, 32, PT_THREAD_POINTER * 4,				      \
+  REGISTER (32, 32, PT_THREAD_POINTER * 4,					      \
 	    - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)			      \
-  REGISTER (64, 64, PT_THREAD_POINTER * 8,				      \
+  REGISTER (64, 64, PT_THREAD_POINTER * 8,					      \
 	    - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
 
 /* Read member of the thread descriptor directly.  */
@@ -158,54 +151,10 @@ register void *__thread_register __asm__ ("r13");
 # define THREAD_SETMEM_NC(descr, member, idx, value) \
     ((void)(descr), (THREAD_SELF)->member[idx] = (value))
 
-/* Set the stack guard field in TCB head.  */
-# define THREAD_SET_STACK_GUARD(value) \
-    (((tcbhead_t *) ((char *) __thread_register				      \
-		     - TLS_TCB_OFFSET))[-1].stack_guard = (value))
-# define THREAD_COPY_STACK_GUARD(descr) \
-    (((tcbhead_t *) ((char *) (descr)					      \
-		     + TLS_PRE_TCB_SIZE))[-1].stack_guard		      \
-     = ((tcbhead_t *) ((char *) __thread_register			      \
-		       - TLS_TCB_OFFSET))[-1].stack_guard)
-
-/* Set the stack guard field in TCB head.  */
-# define THREAD_GET_POINTER_GUARD() \
-    (((tcbhead_t *) ((char *) __thread_register				      \
-		     - TLS_TCB_OFFSET))[-1].pointer_guard)
-# define THREAD_SET_POINTER_GUARD(value) \
-    (THREAD_GET_POINTER_GUARD () = (value))
-# define THREAD_COPY_POINTER_GUARD(descr) \
-    (((tcbhead_t *) ((char *) (descr)					      \
-		     + TLS_PRE_TCB_SIZE))[-1].pointer_guard		      \
-     = THREAD_GET_POINTER_GUARD())
-
 /* l_tls_offset == 0 is perfectly valid on PPC, so we have to use some
    different value to mean unset l_tls_offset.  */
 # define NO_TLS_OFFSET		-1
 
-/* Get and set the global scope generation counter in struct pthread.  */
-#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								     \
-	= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag,	     \
-			       THREAD_GSCOPE_FLAG_UNUSED);		     \
-      if (__res == THREAD_GSCOPE_FLAG_WAIT)				     \
-	lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1);		     \
-    }									     \
-  while (0)
-#define THREAD_GSCOPE_SET_FLAG() \
-  do									     \
-    {									     \
-      THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED;	     \
-      atomic_write_barrier ();						     \
-    }									     \
-  while (0)
-#define THREAD_GSCOPE_WAIT() \
-  GL(dl_wait_lookup_done) ()
-
 #endif /* __ASSEMBLER__ */
 
 #endif	/* tls.h */