rem: dprintf("> ");
add: dprintf("kdebug> ");
context: static void kernel_debugger_loop(){	int argc;	struct debugger_command *cmd;	int_disable_interrupts();	dprintf("kernel debugger on cpu %d\n", smp_get_current_cpu());	debugger_on_cpu = smp_get_current_cpu();	for(;;) {		dprintf("> ");		debug_read_line(line_buf[cur_line], LINE_BUF_SIZE);		debug_parse_line(line_buf[cur_line], args, &argc, MAX_ARGS);		if(argc <= 0)			continue;		debugger_on_cpu = smp_get_current_cpu();		cmd = commands;		while(cmd != NULL) {			if(strcmp(args[0], cmd->cmd) == 0) {				cmd->func(argc, args);			}			cmd = cmd->next;		}		cur_line++;		if(cur_line >= HISTORY_SIZE)			cur_line = 0;	}}