Comment 4 for bug 1590236

IMO, the AArch64 libunwind port (included via AArch64-port.diff debian patch) should be setting enable_debug_frame to "yes" for aarch64 alongside arm in confirure.ac:

AC_MSG_CHECKING([whether to load .debug_frame sections])
AC_ARG_ENABLE(debug_frame,
AS_HELP_STRING([--enable-debug-frame],[Load the ".debug_frame" section if available]),, [
case "${target_arch}" in
  (arm) enable_debug_frame=yes;;
  (*) enable_debug_frame=no;;
esac])
if test x$enable_debug_frame = xyes; then
  AC_DEFINE([CONFIG_DEBUG_FRAME], [], [Enable Debug Frame])
fi
AC_MSG_RESULT([$enable_debug_frame])