return ERROR_FAIL;
        }
 
-       handler_address = strtoul(args[1], NULL, 0);
+       COMMAND_PARSE_NUMBER(u32, args[1], handler_address);
 
        if (((handler_address >= 0x800) && (handler_address <= 0x1fef800)) ||
                ((handler_address >= 0xfe000800) && (handler_address <= 0xfffff800)))
                return ERROR_FAIL;
        }
 
-       cache_clean_address = strtoul(args[1], NULL, 0);
+       COMMAND_PARSE_NUMBER(u32, args[1], cache_clean_address);
 
        if (cache_clean_address & 0xffff)
        {
        }
        else
        {
-               xscale->vector_catch = strtoul(args[0], NULL, 0);
+               COMMAND_PARSE_NUMBER(u32, args[0], xscale->vector_catch);
                buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 8, xscale->vector_catch);
                xscale_write_dcsr(target, -1, -1);
        }
        else
        {
                int idx;
+               COMMAND_PARSE_NUMBER(int, args[1], idx);
                uint32_t vec;
-               idx = strtoul(args[1], NULL, 0);
-               vec = strtoul(args[2], NULL, 0);
+               COMMAND_PARSE_NUMBER(u32, args[2], vec);
 
                if (idx < 1 || idx >= 8)
                        err = 1;
 
        if ((argc >= 2) && (strcmp("fill", args[1]) == 0))
        {
+               uint32_t fill = 1;
                if (argc >= 3)
-                       xscale->trace.buffer_fill = strtoul(args[2], NULL, 0);
-               else
-                       xscale->trace.buffer_fill = 1;
+                       COMMAND_PARSE_NUMBER(u32, args[2], fill);
+               xscale->trace.buffer_fill = fill;
        }
        else if ((argc >= 2) && (strcmp("wrap", args[1]) == 0))
        {
        if (argc >= 2)
        {
                xscale->trace.image->base_address_set = 1;
-               xscale->trace.image->base_address = strtoul(args[1], NULL, 0);
+               COMMAND_PARSE_NUMBER(u32, args[1], xscale->trace.image->base_address);
        }
        else
        {
        reg_t *reg = NULL;
        if (argc > 0)
        {
-               reg_no = strtoul(args[0], NULL, 0);
+               COMMAND_PARSE_NUMBER(u32, args[0], reg_no);
                /*translate from xscale cp15 register no to openocd register*/
                switch (reg_no)
                {
        }
        else if (argc == 2)
        {
-
-               uint32_t value = strtoul(args[1], NULL, 0);
+               uint32_t value;
+               COMMAND_PARSE_NUMBER(u32, args[1], value);
 
                /* send CP write request (command 0x41) */
                xscale_send_u32(target, 0x41);