align the stack pointer by 16 bytes

2017-03-15 00:59:26 +01:00 · 2017-03-15 00:59:26 +01:00 · 78d6a23ad3
parent bdb95567e4
commit 78d6a23ad3
1 changed files with 3 additions and 1 deletions
--- 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);