Align stack of zend_fiber_execute

Author: trowski

Zend/zend_fibers.c

@@ -334,7 +334,7 @@ static zend_always_inline zend_vm_stack zend_fiber_vm_stack_alloc(size_t size) /
 }
 /* }}} */
 
-static void zend_fiber_execute(zend_fiber_context *context) /* {{{ */
+static void ZEND_STACK_ALIGNED zend_fiber_execute(zend_fiber_context *context) /* {{{ */
 {
 	zend_fiber *fiber = EG(current_fiber);
 	ZEND_ASSERT(fiber);

Zend/zend_portability.h

@@ -281,6 +281,12 @@ char *alloca();
 # define ZEND_NORETURN
 #endif
 
+#if __has_attribute(force_align_arg_pointer)
+# define ZEND_STACK_ALIGNED __attribute__((force_align_arg_pointer))
+#else
+# define ZEND_STACK_ALIGNED
+#endif
+
 #if (defined(__GNUC__) && __GNUC__ >= 3 && !defined(__INTEL_COMPILER) && !defined(DARWIN) && !defined(__hpux) && !defined(_AIX) && !defined(__osf__))
 # define HAVE_NORETURN_ALIAS
 # define HAVE_ATTRIBUTE_WEAK