from cortex_a.c:3492
static const struct command_registration cortex_r4_command_handlers[] = {
{
.chain = arm_command_handlers,
},
{
.name = "cortex_r4",
.mode = COMMAND_ANY,
.help = "Cortex-R4 command group",
.usage = "",
.chain = cortex_r4_exec_command_handlers,
},
COMMAND_REGISTRATION_DONE
};