greg_t needs to have the same aligment as the kernel structure.

diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sys/ucontext.h b/sysdeps/unix/sysv/linux/s390/s390-32/sys/ucontext.h
index 3e22d89..d1ae64c 100644 (file)
--- a/sysdeps/unix/sysv/linux/s390/s390-32/sys/ucontext.h
+++ b/sysdeps/unix/sysv/linux/s390/s390-32/sys/ucontext.h
@@ -39,7 +39,8 @@ typedef unsigned long greg_t;
    that has the same size as s390_regs. */
 #define NGREG 36
 #define NUM_FPRS 16
-typedef greg_t gregset_t[NGREG];
+/* Must match kernels psw_t alignment */
+typedef greg_t gregset_t[NGREG] __attribute__ ((aligned(8)));
 
 typedef union
 {