2008-02-29  Samuel Thibault  <samuel.thibault@ens-lyon.org

	* sysdeps/l4/hurd/i386/pt-setup.c (stack_setup): Align stack on 0x10
	for MMX operations.
	* sysdeps/mach/hurd/i386/pt-setup.c (stack_setup): Likewise.

Index: sysdeps/l4/hurd/i386/pt-setup.c
===================================================================
RCS file: /cvsroot/hurd/hurd/libpthread/sysdeps/l4/hurd/i386/pt-setup.c,v
retrieving revision 1.1
diff -u -p -r1.1 pt-setup.c
--- hurd/libpthread/sysdeps/l4/hurd/i386/pt-setup.c	10 Oct 2002 23:05:05 -0000	1.1
+++ hurd/libpthread/sysdeps/l4/hurd/i386/pt-setup.c	29 Feb 2008 01:30:29 -0000
@@ -47,8 +47,10 @@ stack_setup (struct __pthread *thread,
   if (start_routine)
     {
       /* Set up call frame.  */
-      *--top = (L4_Word_t) arg;	/* Argument to START_ROUTINE.  */
-      *--top = (L4_Word_t) start_routine;
+      top -= 2*sizeof(L4_Word_t);
+      top = (unsigned long) top & ~0xf;
+      top[1] = (L4_Word_t) arg;	/* Argument to START_ROUTINE.  */
+      top[0] = (L4_Word_t) start_routine;
       *--top = 0;		/* Fake return address.  */
     }
 
Index: sysdeps/mach/hurd/i386/pt-setup.c
===================================================================
RCS file: /cvsroot/hurd/hurd/libpthread/sysdeps/mach/hurd/i386/pt-setup.c,v
retrieving revision 1.4
diff -u -p -r1.4 pt-setup.c
--- hurd/libpthread/sysdeps/mach/hurd/i386/pt-setup.c	12 May 2005 20:55:37 -0000	1.4
+++ hurd/libpthread/sysdeps/mach/hurd/i386/pt-setup.c	29 Feb 2008 01:30:29 -0000
@@ -63,8 +63,10 @@ stack_setup (struct __pthread *thread,
   if (start_routine)
     {
       /* And then the call frame.  */
-      *--top = (uintptr_t) arg;	/* Argument to START_ROUTINE.  */
-      *--top = (uintptr_t) start_routine;
+      top -= 2*sizeof(uintptr_t);
+      top = (uintptr_t) top & ~0xf;
+      top[1] = (uintptr_t) arg;	/* Argument to START_ROUTINE.  */
+      top[0] = (uintptr_t) start_routine;
       *--top = 0;		/* Fake return address.  */
     }