[PATCH v1 1/2] score: Enforce stack_end alignment

[Kinsey Moore]

The size of the reserved TLS space is not guaranteed to adhere to stack
alignment requirements which can cause stack_end to become misaligned.
This enforces the alignment of stack_end.
---
 cpukit/score/src/threadinitialize.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cpukit/score/src/threadinitialize.c b/cpukit/score/src/threadinitialize.c
index 05c30c3d43..ad5dccbbb2 100644
--- a/cpukit/score/src/threadinitialize.c
+++ b/cpukit/score/src/threadinitialize.c
@@ -108,6 +108,10 @@ bool _Thread_Initialize(
       ( ( (uintptr_t) stack_end + tls_align - 1 ) & ~( tls_align - 1 ) );
   }
 
+  /* Enforce stack alignment */
+  stack_end = (char *)((uintptr_t) stack_end &
+    ~( (uintptr_t) CPU_STACK_ALIGNMENT - 1 ));
+
   _Stack_Initialize(
     &the_thread->Start.Initial_stack,
     stack_begin,
-- 
2.20.1