fix misaligned pointer-like objects in arm atomics asm source file

this file's .data section was not aligned, and just happened to get
the correct alignment with past builds. it's likely that the move of
atomic.s from arch/arm/src to src/thread/arm caused the change in
alignment, which broke the atomic and thread-pointer access fragments
on actual armv5 hardware.

diff --git a/src/thread/arm/atomics.s b/src/thread/arm/atomics.s
index 5c5b0e3ed481ee6f78a97509bb7892acac27b1e6..673fc03b811a3bd2abd512792e1046dc19a1ffe6 100644 (file)
--- a/src/thread/arm/atomics.s
+++ b/src/thread/arm/atomics.s
@@ -95,6 +95,8 @@ __a_gettp_dummy:
        bx lr
 
 .data
+.align 2
+
 .global __a_barrier_ptr
 .hidden __a_barrier_ptr
 __a_barrier_ptr: