The ELF psABI for PPC specifies that the stack shall always be 16-byte aligned.

ok mpi@ deraadt@

diff --git a/sys/arch/powerpc/include/_types.h b/sys/arch/powerpc/include/_types.h
index 278ae4a..5a4da2c 100644 (file)
--- a/sys/arch/powerpc/include/_types.h
+++ b/sys/arch/powerpc/include/_types.h
@@ -1,4 +1,4 @@
-/*     $OpenBSD: _types.h,v 1.20 2014/03/19 05:14:13 guenther Exp $    */
+/*     $OpenBSD: _types.h,v 1.21 2015/04/21 01:38:41 guenther Exp $    */
 
 /*-
  * Copyright (c) 1990, 1993
@@ -52,7 +52,7 @@ typedef struct label_t {
  * (within reasonable limits).
  */
 #define        _ALIGNBYTES             (sizeof(double) - 1)
-#define        _STACKALIGNBYTES        _ALIGNBYTES
+#define        _STACKALIGNBYTES        15
 #define        _ALIGN(p)               (((unsigned long)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
 #define        _ALIGNED_POINTER(p,t)   ((((unsigned long)(p)) & (sizeof(t) - 1)) == 0)