{
        target_t *target;
        jtag_tap_t *tap;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
 
        if (argc != 2)
        {
                return ERROR_FAIL;
        }
 
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "ETB: current target isn't an ARM7/ARM9 target");
+               command_print(cmd_ctx, "ETB: '%s' isn't an ARM", args[0]);
                return ERROR_FAIL;
        }
 
                return ERROR_FAIL;
        }
 
-       if (arm7_9->etm_ctx)
+       if (arm->etm)
        {
                etb_t *etb = malloc(sizeof(etb_t));
 
-               arm7_9->etm_ctx->capture_driver_priv = etb;
+               arm->etm->capture_driver_priv = etb;
 
                etb->tap  = tap;
                etb->cur_scan_chain = 0xffffffff;
 
 static int handle_etm_dummy_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
 
        target = get_target(args[0]);
 
                return ERROR_FAIL;
        }
 
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
+               command_print(cmd_ctx, "target '%s' isn't an ARM", args[0]);
                return ERROR_FAIL;
        }
 
-       if (arm7_9->etm_ctx)
+       if (arm->etm)
        {
-               arm7_9->etm_ctx->capture_driver_priv = NULL;
+               arm->etm->capture_driver_priv = NULL;
        }
        else
        {
 
 static int handle_oocd_trace_config_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
 
        if (argc != 2)
        {
                LOG_ERROR("incomplete 'oocd_trace config <target> <tty>' command");
-               exit(-1);
+               return ERROR_FAIL;
        }
 
        target = get_current_target(cmd_ctx);
-
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (arm7_9->etm_ctx)
+       if (arm->etm)
        {
                oocd_trace_t *oocd_trace = malloc(sizeof(oocd_trace_t));
 
-               arm7_9->etm_ctx->capture_driver_priv = oocd_trace;
-               oocd_trace->etm_ctx = arm7_9->etm_ctx;
+               arm->etm->capture_driver_priv = oocd_trace;
+               oocd_trace->etm_ctx = arm->etm;
 
                /* copy name of TTY device used to communicate with OpenOCD + trace */
                oocd_trace->tty = strndup(args[1], 256);
 static int handle_oocd_trace_status_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        oocd_trace_t *oocd_trace;
        uint32_t status;
 
        target = get_current_target(cmd_ctx);
 
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!arm7_9->etm_ctx)
+       if (!arm->etm)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
-       if (strcmp(arm7_9->etm_ctx->capture_driver->name, "oocd_trace") != 0)
+       if (strcmp(arm->etm->capture_driver->name, "oocd_trace") != 0)
        {
                command_print(cmd_ctx, "current target's ETM capture driver isn't 'oocd_trace'");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
-       oocd_trace = (oocd_trace_t*)arm7_9->etm_ctx->capture_driver_priv;
+       oocd_trace = (oocd_trace_t*)arm->etm->capture_driver_priv;
 
        oocd_trace_read_reg(oocd_trace, OOCD_TRACE_STATUS, &status);
 
 static int handle_oocd_trace_resync_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
        target_t *target;
-       armv4_5_common_t *armv4_5;
-       arm7_9_common_t *arm7_9;
+       struct arm *arm;
        oocd_trace_t *oocd_trace;
        size_t bytes_written;
        uint8_t cmd_array[1];
 
        target = get_current_target(cmd_ctx);
 
-       if (arm7_9_get_arch_pointers(target, &armv4_5, &arm7_9) != ERROR_OK)
+       arm = target_to_arm(target);
+       if (!is_arm(arm))
        {
-               command_print(cmd_ctx, "current target isn't an ARM7/ARM9 target");
-               return ERROR_OK;
+               command_print(cmd_ctx, "current target isn't an ARM");
+               return ERROR_FAIL;
        }
 
-       if (!arm7_9->etm_ctx)
+       if (!arm->etm)
        {
                command_print(cmd_ctx, "current target doesn't have an ETM configured");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
-       if (strcmp(arm7_9->etm_ctx->capture_driver->name, "oocd_trace") != 0)
+       if (strcmp(arm->etm->capture_driver->name, "oocd_trace") != 0)
        {
                command_print(cmd_ctx, "current target's ETM capture driver isn't 'oocd_trace'");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
 
-       oocd_trace = (oocd_trace_t*)arm7_9->etm_ctx->capture_driver_priv;
+       oocd_trace = (oocd_trace_t*)arm->etm->capture_driver_priv;
 
        cmd_array[0] = 0xf0;