Following the patch 'perf stat: Fix --no-scale', an
alignment trap happens in process_counter_values()
on ARMv7 platforms due to the attempt to copy non
64 bits aligned double words (pointed by 'count')
via a NEON vectored instruction ('vld1' with 64
bits alignment constraint).This patch sets a 64 bits alignment constraint on 'contents[]' field in 'struct xyarray' since the 'count' pointer used above points to such a structure. Signed-off-by: Gerald Baeza <[email protected]> --- tools/perf/lib/include/internal/xyarray.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/perf/lib/include/internal/xyarray.h b/tools/perf/lib/include/internal/xyarray.h index 3bf70e4..51e35d6 100644 --- a/tools/perf/lib/include/internal/xyarray.h +++ b/tools/perf/lib/include/internal/xyarray.h @@ -2,6 +2,7 @@ #ifndef __LIBPERF_INTERNAL_XYARRAY_H #define __LIBPERF_INTERNAL_XYARRAY_H +#include <linux/compiler.h> #include <sys/types.h> struct xyarray { @@ -10,7 +11,7 @@ struct xyarray { size_t entries; size_t max_x; size_t max_y; - char contents[]; + char contents[] __aligned(8); }; struct xyarray *xyarray__new(int xlen, int ylen, size_t entry_size); -- 2.7.4
