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.

2 files changed, 8 insertions, 4 deletions

diff --git a/sysdeps/l4/hurd/i386/pt-setup.c b/sysdeps/l4/hurd/i386/pt-setup.c
index fe77d533..6afcd141 100644
--- a/sysdeps/l4/hurd/i386/pt-setup.c
+++ b/sysdeps/l4/hurd/i386/pt-setup.c
@@ -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.  */
     }
 
diff --git a/sysdeps/mach/hurd/i386/pt-setup.c b/sysdeps/mach/hurd/i386/pt-setup.c
index 32ace6ad..71f60e23 100644
--- a/sysdeps/mach/hurd/i386/pt-setup.c
+++ b/sysdeps/mach/hurd/i386/pt-setup.c
@@ -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.  */
     }