From 78d6a23ad35dd9e50ff4c5aabfef1237db41dd87 Mon Sep 17 00:00:00 2001
From: q66 <daniel@octaforge.org>
Date: Wed, 15 Mar 2017 00:59:26 +0100
Subject: [PATCH] align the stack pointer by 16 bytes

---
 ostd/internal/context.hh | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ostd/internal/context.hh b/ostd/internal/context.hh
index f1c26ee..57a92f1 100644
--- a/ostd/internal/context.hh
+++ b/ostd/internal/context.hh
@@ -107,8 +107,10 @@ protected:
     void make_context(SA &sa) {
         p_stack = sa.allocate();
 
-        constexpr size_t salign = alignof(SA);
+        /* 16 byte stack pointer alignment */
+        constexpr size_t salign = 16;
         constexpr size_t sasize = sizeof(SA);
+
         void *sp = static_cast<byte *>(p_stack.ptr) - sasize - salign;
         size_t space = sasize + salign;
         sp = std::align(salign, sasize, sp, space);