target: unify memory read/write commands
[openocd.git] / src / target / target.c
index ee302ee47c7a3673108ae2e9e9f4fe8d31318241..7946f76facbb4806d3548375cb3e28e60e10f37e 100644 (file)
@@ -54,6 +54,7 @@
 #include "image.h"
 #include "rtos/rtos.h"
 #include "transport/transport.h"
+#include "arm_cti.h"
 
 /* default halt wait timeout (ms) */
 #define DEFAULT_HALT_TIMEOUT 5000
@@ -105,6 +106,10 @@ extern struct target_type nds32_v3m_target;
 extern struct target_type or1k_target;
 extern struct target_type quark_x10xx_target;
 extern struct target_type quark_d20xx_target;
+extern struct target_type stm8_target;
+extern struct target_type riscv_target;
+extern struct target_type mem_ap_target;
+extern struct target_type esirisc_target;
 
 static struct target_type *target_types[] = {
        &arm7tdmi_target,
@@ -136,6 +141,10 @@ static struct target_type *target_types[] = {
        &or1k_target,
        &quark_x10xx_target,
        &quark_d20xx_target,
+       &stm8_target,
+       &riscv_target,
+       &mem_ap_target,
+       &esirisc_target,
 #if BUILD_TARGET64
        &aarch64_target,
 #endif
@@ -202,10 +211,6 @@ static const Jim_Nvp nvp_target_event[] = {
        { .value = TARGET_EVENT_RESET_ASSERT_POST,   .name = "reset-assert-post" },
        { .value = TARGET_EVENT_RESET_DEASSERT_PRE,  .name = "reset-deassert-pre" },
        { .value = TARGET_EVENT_RESET_DEASSERT_POST, .name = "reset-deassert-post" },
-       { .value = TARGET_EVENT_RESET_HALT_PRE,      .name = "reset-halt-pre" },
-       { .value = TARGET_EVENT_RESET_HALT_POST,     .name = "reset-halt-post" },
-       { .value = TARGET_EVENT_RESET_WAIT_PRE,      .name = "reset-wait-pre" },
-       { .value = TARGET_EVENT_RESET_WAIT_POST,     .name = "reset-wait-post" },
        { .value = TARGET_EVENT_RESET_INIT,          .name = "reset-init" },
        { .value = TARGET_EVENT_RESET_END,           .name = "reset-end" },
 
@@ -246,6 +251,7 @@ static const Jim_Nvp nvp_target_debug_reason[] = {
        { .name = "single-step"              , .value = DBG_REASON_SINGLESTEP },
        { .name = "target-not-halted"        , .value = DBG_REASON_NOTHALTED  },
        { .name = "program-exit"             , .value = DBG_REASON_EXIT },
+       { .name = "exception-catch"          , .value = DBG_REASON_EXC_CATCH },
        { .name = "undefined"                , .value = DBG_REASON_UNDEFINED },
        { .name = NULL, .value = -1 },
 };
@@ -370,7 +376,7 @@ uint16_t target_buffer_get_u16(struct target *target, const uint8_t *buffer)
 }
 
 /* read a uint8_t from a buffer in target memory endianness */
-static uint8_t target_buffer_get_u8(struct target *target, const uint8_t *buffer)
+static __attribute__((unused)) uint8_t target_buffer_get_u8(struct target *target, const uint8_t *buffer)
 {
        return *buffer & 0x0ff;
 }
@@ -512,7 +518,7 @@ struct target *get_target_by_num(int num)
 
 struct target *get_current_target(struct command_context *cmd_ctx)
 {
-       struct target *target = get_target_by_num(cmd_ctx->current_target);
+       struct target *target = get_current_target_or_null(cmd_ctx);
 
        if (target == NULL) {
                LOG_ERROR("BUG: current_target out of bounds");
@@ -522,6 +528,13 @@ struct target *get_current_target(struct command_context *cmd_ctx)
        return target;
 }
 
+struct target *get_current_target_or_null(struct command_context *cmd_ctx)
+{
+       return cmd_ctx->current_target_override
+               ? cmd_ctx->current_target_override
+               : cmd_ctx->current_target;
+}
+
 int target_poll(struct target *target)
 {
        int retval;
@@ -627,7 +640,7 @@ int target_resume(struct target *target, int current, target_addr_t address,
        return retval;
 }
 
-static int target_process_reset(struct command_context *cmd_ctx, enum target_reset_mode reset_mode)
+static int target_process_reset(struct command_invocation *cmd, enum target_reset_mode reset_mode)
 {
        char buf[100];
        int retval;
@@ -651,13 +664,13 @@ static int target_process_reset(struct command_context *cmd_ctx, enum target_res
        jtag_poll_set_enabled(false);
 
        sprintf(buf, "ocd_process_reset %s", n->name);
-       retval = Jim_Eval(cmd_ctx->interp, buf);
+       retval = Jim_Eval(cmd->ctx->interp, buf);
 
        jtag_poll_set_enabled(save_poll);
 
        if (retval != JIM_OK) {
-               Jim_MakeErrorMessage(cmd_ctx->interp);
-               command_print(NULL, "%s\n", Jim_GetString(Jim_GetResult(cmd_ctx->interp), NULL));
+               Jim_MakeErrorMessage(cmd->ctx->interp);
+               command_print(cmd->ctx, "%s", Jim_GetString(Jim_GetResult(cmd->ctx->interp), NULL));
                return ERROR_FAIL;
        }
 
@@ -810,8 +823,7 @@ done:
 }
 
 /**
- * Downloads a target-specific native code algorithm to the target,
- * executes and leaves it running.
+ * Executes a target-specific native code algorithm and leaves it running.
  *
  * @param target used to run the algorithm
  * @param arch_info target-specific description of the algorithm.
@@ -884,12 +896,45 @@ done:
 }
 
 /**
- * Executes a target-specific native code algorithm in the target.
- * It differs from target_run_algorithm in that the algorithm is asynchronous.
- * Because of this it requires an compliant algorithm:
- * see contrib/loaders/flash/stm32f1x.S for example.
+ * Streams data to a circular buffer on target intended for consumption by code
+ * running asynchronously on target.
+ *
+ * This is intended for applications where target-specific native code runs
+ * on the target, receives data from the circular buffer, does something with
+ * it (most likely writing it to a flash memory), and advances the circular
+ * buffer pointer.
+ *
+ * This assumes that the helper algorithm has already been loaded to the target,
+ * but has not been started yet. Given memory and register parameters are passed
+ * to the algorithm.
+ *
+ * The buffer is defined by (buffer_start, buffer_size) arguments and has the
+ * following format:
+ *
+ *     [buffer_start + 0, buffer_start + 4):
+ *         Write Pointer address (aka head). Written and updated by this
+ *         routine when new data is written to the circular buffer.
+ *     [buffer_start + 4, buffer_start + 8):
+ *         Read Pointer address (aka tail). Updated by code running on the
+ *         target after it consumes data.
+ *     [buffer_start + 8, buffer_start + buffer_size):
+ *         Circular buffer contents.
+ *
+ * See contrib/loaders/flash/stm32f1x.S for an example.
  *
  * @param target used to run the algorithm
+ * @param buffer address on the host where data to be sent is located
+ * @param count number of blocks to send
+ * @param block_size size in bytes of each block
+ * @param num_mem_params count of memory-based params to pass to algorithm
+ * @param mem_params memory-based params to pass to algorithm
+ * @param num_reg_params count of register-based params to pass to algorithm
+ * @param reg_params memory-based params to pass to algorithm
+ * @param buffer_start address on the target of the circular buffer structure
+ * @param buffer_size size of the circular buffer structure
+ * @param entry_point address on the target to execute to start the algorithm
+ * @param exit_point address at which to set a breakpoint to catch the
+ *     end of the algorithm; can be 0 if target triggers a breakpoint itself
  */
 
 int target_run_flash_async_algorithm(struct target *target,
@@ -1008,6 +1053,9 @@ int target_run_flash_async_algorithm(struct target *target,
                retval = target_write_u32(target, wp_addr, wp);
                if (retval != ERROR_OK)
                        break;
+
+               /* Avoid GDB timeouts */
+               keep_alive();
        }
 
        if (retval != ERROR_OK) {
@@ -1098,7 +1146,7 @@ int target_add_breakpoint(struct target *target,
                struct breakpoint *breakpoint)
 {
        if ((target->state != TARGET_HALTED) && (breakpoint->type != BKPT_HARD)) {
-               LOG_WARNING("target %s is not halted", target_name(target));
+               LOG_WARNING("target %s is not halted (add breakpoint)", target_name(target));
                return ERROR_TARGET_NOT_HALTED;
        }
        return target->type->add_breakpoint(target, breakpoint);
@@ -1108,7 +1156,7 @@ int target_add_context_breakpoint(struct target *target,
                struct breakpoint *breakpoint)
 {
        if (target->state != TARGET_HALTED) {
-               LOG_WARNING("target %s is not halted", target_name(target));
+               LOG_WARNING("target %s is not halted (add context breakpoint)", target_name(target));
                return ERROR_TARGET_NOT_HALTED;
        }
        return target->type->add_context_breakpoint(target, breakpoint);
@@ -1118,7 +1166,7 @@ int target_add_hybrid_breakpoint(struct target *target,
                struct breakpoint *breakpoint)
 {
        if (target->state != TARGET_HALTED) {
-               LOG_WARNING("target %s is not halted", target_name(target));
+               LOG_WARNING("target %s is not halted (add hybrid breakpoint)", target_name(target));
                return ERROR_TARGET_NOT_HALTED;
        }
        return target->type->add_hybrid_breakpoint(target, breakpoint);
@@ -1134,7 +1182,7 @@ int target_add_watchpoint(struct target *target,
                struct watchpoint *watchpoint)
 {
        if (target->state != TARGET_HALTED) {
-               LOG_WARNING("target %s is not halted", target_name(target));
+               LOG_WARNING("target %s is not halted (add watchpoint)", target_name(target));
                return ERROR_TARGET_NOT_HALTED;
        }
        return target->type->add_watchpoint(target, watchpoint);
@@ -1148,7 +1196,7 @@ int target_hit_watchpoint(struct target *target,
                struct watchpoint **hit_watchpoint)
 {
        if (target->state != TARGET_HALTED) {
-               LOG_WARNING("target %s is not halted", target->cmd_name);
+               LOG_WARNING("target %s is not halted (hit watchpoint)", target->cmd_name);
                return ERROR_TARGET_NOT_HALTED;
        }
 
@@ -1162,12 +1210,29 @@ int target_hit_watchpoint(struct target *target,
        return target->type->hit_watchpoint(target, hit_watchpoint);
 }
 
+const char *target_get_gdb_arch(struct target *target)
+{
+       if (target->type->get_gdb_arch == NULL)
+               return NULL;
+       return target->type->get_gdb_arch(target);
+}
+
 int target_get_gdb_reg_list(struct target *target,
                struct reg **reg_list[], int *reg_list_size,
                enum target_register_class reg_class)
 {
        return target->type->get_gdb_reg_list(target, reg_list, reg_list_size, reg_class);
 }
+
+bool target_supports_gdb_connection(struct target *target)
+{
+       /*
+        * based on current code, we can simply exclude all the targets that
+        * don't provide get_gdb_reg_list; this could change with new targets.
+        */
+       return !!target->type->get_gdb_reg_list;
+}
+
 int target_step(struct target *target,
                int current, target_addr_t address, int handle_breakpoints)
 {
@@ -1177,7 +1242,7 @@ int target_step(struct target *target,
 int target_get_gdb_fileio_info(struct target *target, struct gdb_fileio_info *fileio_info)
 {
        if (target->state != TARGET_HALTED) {
-               LOG_WARNING("target %s is not halted", target->cmd_name);
+               LOG_WARNING("target %s is not halted (gdb fileio)", target->cmd_name);
                return ERROR_TARGET_NOT_HALTED;
        }
        return target->type->get_gdb_fileio_info(target, fileio_info);
@@ -1186,17 +1251,33 @@ int target_get_gdb_fileio_info(struct target *target, struct gdb_fileio_info *fi
 int target_gdb_fileio_end(struct target *target, int retcode, int fileio_errno, bool ctrl_c)
 {
        if (target->state != TARGET_HALTED) {
-               LOG_WARNING("target %s is not halted", target->cmd_name);
+               LOG_WARNING("target %s is not halted (gdb fileio end)", target->cmd_name);
                return ERROR_TARGET_NOT_HALTED;
        }
        return target->type->gdb_fileio_end(target, retcode, fileio_errno, ctrl_c);
 }
 
+target_addr_t target_address_max(struct target *target)
+{
+       unsigned bits = target_address_bits(target);
+       if (sizeof(target_addr_t) * 8 == bits)
+               return (target_addr_t) -1;
+       else
+               return (((target_addr_t) 1) << bits) - 1;
+}
+
+unsigned target_address_bits(struct target *target)
+{
+       if (target->type->address_bits)
+               return target->type->address_bits(target);
+       return 32;
+}
+
 int target_profiling(struct target *target, uint32_t *samples,
                        uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
 {
        if (target->state != TARGET_HALTED) {
-               LOG_WARNING("target %s is not halted", target->cmd_name);
+               LOG_WARNING("target %s is not halted (profiling)", target->cmd_name);
                return ERROR_TARGET_NOT_HALTED;
        }
        return target->type->profiling(target, samples, max_num_samples,
@@ -1293,7 +1374,7 @@ static int target_init(struct command_context *cmd_ctx)
                return retval;
 
        retval = target_register_timer_callback(&handle_target,
-                       polling_interval, 1, cmd_ctx->interp);
+                       polling_interval, TARGET_TIMER_TYPE_PERIODIC, cmd_ctx->interp);
        if (ERROR_OK != retval)
                return retval;
 
@@ -1396,10 +1477,10 @@ int target_register_trace_callback(int (*callback)(struct target *target,
        return ERROR_OK;
 }
 
-int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int periodic, void *priv)
+int target_register_timer_callback(int (*callback)(void *priv),
+               unsigned int time_ms, enum target_timer_type type, void *priv)
 {
        struct target_timer_callback **callbacks_p = &target_timer_callbacks;
-       struct timeval now;
 
        if (callback == NULL)
                return ERROR_COMMAND_SYNTAX_ERROR;
@@ -1412,18 +1493,12 @@ int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int
 
        (*callbacks_p) = malloc(sizeof(struct target_timer_callback));
        (*callbacks_p)->callback = callback;
-       (*callbacks_p)->periodic = periodic;
+       (*callbacks_p)->type = type;
        (*callbacks_p)->time_ms = time_ms;
        (*callbacks_p)->removed = false;
 
-       gettimeofday(&now, NULL);
-       (*callbacks_p)->when.tv_usec = now.tv_usec + (time_ms % 1000) * 1000;
-       time_ms -= (time_ms % 1000);
-       (*callbacks_p)->when.tv_sec = now.tv_sec + (time_ms / 1000);
-       if ((*callbacks_p)->when.tv_usec > 1000000) {
-               (*callbacks_p)->when.tv_usec = (*callbacks_p)->when.tv_usec - 1000000;
-               (*callbacks_p)->when.tv_sec += 1;
-       }
+       gettimeofday(&(*callbacks_p)->when, NULL);
+       timeval_add_time(&(*callbacks_p)->when, 0, time_ms * 1000);
 
        (*callbacks_p)->priv = priv;
        (*callbacks_p)->next = NULL;
@@ -1558,14 +1633,8 @@ int target_call_trace_callbacks(struct target *target, size_t len, uint8_t *data
 static int target_timer_callback_periodic_restart(
                struct target_timer_callback *cb, struct timeval *now)
 {
-       int time_ms = cb->time_ms;
-       cb->when.tv_usec = now->tv_usec + (time_ms % 1000) * 1000;
-       time_ms -= (time_ms % 1000);
-       cb->when.tv_sec = now->tv_sec + time_ms / 1000;
-       if (cb->when.tv_usec > 1000000) {
-               cb->when.tv_usec = cb->when.tv_usec - 1000000;
-               cb->when.tv_sec += 1;
-       }
+       cb->when = *now;
+       timeval_add_time(&cb->when, 0, cb->time_ms * 1000L);
        return ERROR_OK;
 }
 
@@ -1574,7 +1643,7 @@ static int target_call_timer_callback(struct target_timer_callback *cb,
 {
        cb->callback(cb->priv);
 
-       if (cb->periodic)
+       if (cb->type == TARGET_TIMER_TYPE_PERIODIC)
                return target_timer_callback_periodic_restart(cb, now);
 
        return target_unregister_timer_callback(cb->callback, cb->priv);
@@ -1608,10 +1677,8 @@ static int target_call_timer_callbacks_check_time(int checktime)
                }
 
                bool call_it = (*callback)->callback &&
-                       ((!checktime && (*callback)->periodic) ||
-                        now.tv_sec > (*callback)->when.tv_sec ||
-                        (now.tv_sec == (*callback)->when.tv_sec &&
-                         now.tv_usec >= (*callback)->when.tv_usec));
+                       ((!checktime && (*callback)->type == TARGET_TIMER_TYPE_PERIODIC) ||
+                        timeval_compare(&now, &(*callback)->when) >= 0);
 
                if (call_it)
                        target_call_timer_callback(*callback, &now);
@@ -1870,31 +1937,6 @@ int target_free_working_area(struct target *target, struct working_area *area)
        return target_free_working_area_restore(target, area, 1);
 }
 
-void target_quit(void)
-{
-       struct target_event_callback *pe = target_event_callbacks;
-       while (pe) {
-               struct target_event_callback *t = pe->next;
-               free(pe);
-               pe = t;
-       }
-       target_event_callbacks = NULL;
-
-       struct target_timer_callback *pt = target_timer_callbacks;
-       while (pt) {
-               struct target_timer_callback *t = pt->next;
-               free(pt);
-               pt = t;
-       }
-       target_timer_callbacks = NULL;
-
-       for (struct target *target = all_targets;
-            target; target = target->next) {
-               if (target->type->deinit_target)
-                       target->type->deinit_target(target);
-       }
-}
-
 /* free resources and restore memory, if restoring memory fails,
  * free up resources anyway
  */
@@ -1925,6 +1967,14 @@ static void target_free_all_working_areas_restore(struct target *target, int res
 void target_free_all_working_areas(struct target *target)
 {
        target_free_all_working_areas_restore(target, 1);
+
+       /* Now we have none or only one working area marked as free */
+       if (target->working_areas) {
+               /* Free the last one to allow on-the-fly moving and resizing */
+               free(target->working_areas->backup);
+               free(target->working_areas);
+               target->working_areas = NULL;
+       }
 }
 
 /* Find the largest number of bytes that can be allocated */
@@ -1946,6 +1996,75 @@ uint32_t target_get_working_area_avail(struct target *target)
        return max_size;
 }
 
+static void target_destroy(struct target *target)
+{
+       if (target->type->deinit_target)
+               target->type->deinit_target(target);
+
+       if (target->semihosting)
+               free(target->semihosting);
+
+       jtag_unregister_event_callback(jtag_enable_callback, target);
+
+       struct target_event_action *teap = target->event_action;
+       while (teap) {
+               struct target_event_action *next = teap->next;
+               Jim_DecrRefCount(teap->interp, teap->body);
+               free(teap);
+               teap = next;
+       }
+
+       target_free_all_working_areas(target);
+
+       /* release the targets SMP list */
+       if (target->smp) {
+               struct target_list *head = target->head;
+               while (head != NULL) {
+                       struct target_list *pos = head->next;
+                       head->target->smp = 0;
+                       free(head);
+                       head = pos;
+               }
+               target->smp = 0;
+       }
+
+       free(target->gdb_port_override);
+       free(target->type);
+       free(target->trace_info);
+       free(target->fileio_info);
+       free(target->cmd_name);
+       free(target);
+}
+
+void target_quit(void)
+{
+       struct target_event_callback *pe = target_event_callbacks;
+       while (pe) {
+               struct target_event_callback *t = pe->next;
+               free(pe);
+               pe = t;
+       }
+       target_event_callbacks = NULL;
+
+       struct target_timer_callback *pt = target_timer_callbacks;
+       while (pt) {
+               struct target_timer_callback *t = pt->next;
+               free(pt);
+               pt = t;
+       }
+       target_timer_callbacks = NULL;
+
+       for (struct target *target = all_targets; target;) {
+               struct target *tmp;
+
+               tmp = target->next;
+               target_destroy(target);
+               target = tmp;
+       }
+
+       all_targets = NULL;
+}
+
 int target_arch_state(struct target *target)
 {
        int retval;
@@ -2015,8 +2134,7 @@ static int target_profiling_default(struct target *target, uint32_t *samples,
                        break;
 
                gettimeofday(&now, NULL);
-               if ((sample_count >= max_num_samples) ||
-                       ((now.tv_sec >= timeout.tv_sec) && (now.tv_usec >= timeout.tv_usec))) {
+               if ((sample_count >= max_num_samples) || timeval_compare(&now, &timeout) >= 0) {
                        LOG_INFO("Profiling completed. %" PRIu32 " samples.", sample_count);
                        break;
                }
@@ -2189,21 +2307,19 @@ int target_checksum_memory(struct target *target, target_addr_t address, uint32_
        return retval;
 }
 
-int target_blank_check_memory(struct target *target, target_addr_t address, uint32_t size, uint32_t* blank,
+int target_blank_check_memory(struct target *target,
+       struct target_memory_check_block *blocks, int num_blocks,
        uint8_t erased_value)
 {
-       int retval;
        if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
 
-       if (target->type->blank_check_memory == 0)
+       if (target->type->blank_check_memory == NULL)
                return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 
-       retval = target->type->blank_check_memory(target, address, size, blank, erased_value);
-
-       return retval;
+       return target->type->blank_check_memory(target, blocks, num_blocks, erased_value);
 }
 
 int target_read_u64(struct target *target, target_addr_t address, uint64_t *value)
@@ -2476,7 +2592,10 @@ static int find_target(struct command_context *cmd_ctx, const char *name)
                return ERROR_FAIL;
        }
 
-       cmd_ctx->current_target = target->target_number;
+       cmd_ctx->current_target = target;
+       if (cmd_ctx->current_target_override)
+               cmd_ctx->current_target_override = target;
+
        return ERROR_OK;
 }
 
@@ -2504,7 +2623,7 @@ COMMAND_HANDLER(handle_targets_command)
                else
                        state = "tap-disabled";
 
-               if (CMD_CTX->current_target == target->target_number)
+               if (CMD_CTX->current_target == target)
                        marker = '*';
 
                /* keep columns lined up to match the headers above */
@@ -2723,6 +2842,8 @@ COMMAND_HANDLER(handle_reg_command)
                        for (i = 0, reg = cache->reg_list;
                                        i < cache->num_regs;
                                        i++, reg++, count++) {
+                               if (reg->exist == false)
+                                       continue;
                                /* only print cached values if they are valid */
                                if (reg->valid) {
                                        value = buf_to_str(reg->value,
@@ -2776,14 +2897,15 @@ COMMAND_HANDLER(handle_reg_command)
                /* access a single register by its name */
                reg = register_get_by_name(target->reg_cache, CMD_ARGV[0], 1);
 
-               if (!reg) {
-                       command_print(CMD_CTX, "register %s not found in current target", CMD_ARGV[0]);
-                       return ERROR_OK;
-               }
+               if (!reg)
+                       goto not_found;
        }
 
        assert(reg != NULL); /* give clang a hint that we *know* reg is != NULL here */
 
+       if (!reg->exist)
+               goto not_found;
+
        /* display a register */
        if ((CMD_ARGC == 1) || ((CMD_ARGC == 2) && !((CMD_ARGV[1][0] >= '0')
                        && (CMD_ARGV[1][0] <= '9')))) {
@@ -2817,6 +2939,10 @@ COMMAND_HANDLER(handle_reg_command)
        }
 
        return ERROR_COMMAND_SYNTAX_ERROR;
+
+not_found:
+       command_print(CMD_CTX, "register %s not found in current target", CMD_ARGV[0]);
+       return ERROR_OK;
 }
 
 COMMAND_HANDLER(handle_poll_command)
@@ -2908,6 +3034,9 @@ COMMAND_HANDLER(handle_halt_command)
        LOG_DEBUG("-");
 
        struct target *target = get_current_target(CMD_CTX);
+
+       target->verbose_halt_msg = true;
+
        int retval = target_halt(target);
        if (ERROR_OK != retval)
                return retval;
@@ -2950,7 +3079,7 @@ COMMAND_HANDLER(handle_reset_command)
        }
 
        /* reset *all* targets */
-       return target_process_reset(CMD_CTX, reset_mode);
+       return target_process_reset(CMD, reset_mode);
 }
 
 
@@ -3009,16 +3138,16 @@ static void handle_md_output(struct command_context *cmd_ctx,
        const char *value_fmt;
        switch (size) {
        case 8:
-               value_fmt = "%16.16llx ";
+               value_fmt = "%16.16"PRIx64" ";
                break;
        case 4:
-               value_fmt = "%8.8x ";
+               value_fmt = "%8.8"PRIx64" ";
                break;
        case 2:
-               value_fmt = "%4.4x ";
+               value_fmt = "%4.4"PRIx64" ";
                break;
        case 1:
-               value_fmt = "%2.2x ";
+               value_fmt = "%2.2"PRIx64" ";
                break;
        default:
                /* "can't happen", caller checked */
@@ -3103,6 +3232,10 @@ COMMAND_HANDLER(handle_md_command)
                COMMAND_PARSE_NUMBER(uint, CMD_ARGV[1], count);
 
        uint8_t *buffer = calloc(count, size);
+       if (buffer == NULL) {
+               LOG_ERROR("Failed to allocate md read buffer");
+               return ERROR_FAIL;
+       }
 
        struct target *target = get_current_target(CMD_CTX);
        int retval = fn(target, address, size, count, buffer);
@@ -3604,38 +3737,31 @@ static int handle_bp_command_set(struct command_context *cmd_ctx,
 
        if (asid == 0) {
                retval = breakpoint_add(target, addr, length, hw);
+               /* error is always logged in breakpoint_add(), do not print it again */
                if (ERROR_OK == retval)
                        command_print(cmd_ctx, "breakpoint set at " TARGET_ADDR_FMT "", addr);
-               else {
-                       LOG_ERROR("Failure setting breakpoint, the same address(IVA) is already used");
-                       return retval;
-               }
+
        } else if (addr == 0) {
                if (target->type->add_context_breakpoint == NULL) {
-                       LOG_WARNING("Context breakpoint not available");
-                       return ERROR_OK;
+                       LOG_ERROR("Context breakpoint not available");
+                       return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
                }
                retval = context_breakpoint_add(target, asid, length, hw);
+               /* error is always logged in context_breakpoint_add(), do not print it again */
                if (ERROR_OK == retval)
                        command_print(cmd_ctx, "Context breakpoint set at 0x%8.8" PRIx32 "", asid);
-               else {
-                       LOG_ERROR("Failure setting breakpoint, the same address(CONTEXTID) is already used");
-                       return retval;
-               }
+
        } else {
                if (target->type->add_hybrid_breakpoint == NULL) {
-                       LOG_WARNING("Hybrid breakpoint not available");
-                       return ERROR_OK;
+                       LOG_ERROR("Hybrid breakpoint not available");
+                       return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
                }
                retval = hybrid_breakpoint_add(target, addr, asid, length, hw);
+               /* error is always logged in hybrid_breakpoint_add(), do not print it again */
                if (ERROR_OK == retval)
                        command_print(cmd_ctx, "Hybrid breakpoint set at 0x%8.8" PRIx32 "", asid);
-               else {
-                       LOG_ERROR("Failure setting breakpoint, the same address is already used");
-                       return retval;
-               }
        }
-       return ERROR_OK;
+       return retval;
 }
 
 COMMAND_HANDLER(handle_bp_command)
@@ -3669,7 +3795,7 @@ COMMAND_HANDLER(handle_bp_command)
                                addr = 0;
                                return handle_bp_command_set(CMD_CTX, addr, asid, length, hw);
                        }
-
+                       /* fallthrough */
                case 4:
                        hw = BKPT_HARD;
                        COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);
@@ -3825,7 +3951,7 @@ typedef unsigned char UNIT[2];  /* unit of profiling */
 
 /* Dump a gmon.out histogram file. */
 static void write_gmon(uint32_t *samples, uint32_t sampleNum, const char *filename, bool with_range,
-                       uint32_t start_address, uint32_t end_address, struct target *target)
+                       uint32_t start_address, uint32_t end_address, struct target *target, uint32_t duration_ms)
 {
        uint32_t i;
        FILE *f = fopen(filename, "w");
@@ -3893,7 +4019,8 @@ static void write_gmon(uint32_t *samples, uint32_t sampleNum, const char *filena
        writeLong(f, min, target);                      /* low_pc */
        writeLong(f, max, target);                      /* high_pc */
        writeLong(f, numBuckets, target);       /* # of buckets */
-       writeLong(f, 100, target);                      /* KLUDGE! We lie, ca. 100Hz best case. */
+       float sample_rate = sampleNum / (duration_ms / 1000.0);
+       writeLong(f, sample_rate, target);
        writeString(f, "seconds");
        for (i = 0; i < (15-strlen("seconds")); i++)
                writeData(f, &zero, 1);
@@ -3942,6 +4069,7 @@ COMMAND_HANDLER(handle_profile_command)
                return ERROR_FAIL;
        }
 
+       uint64_t timestart_ms = timeval_ms();
        /**
         * Some cores let us sample the PC without the
         * annoying halt/resume step; for example, ARMv7 PCSR.
@@ -3953,6 +4081,7 @@ COMMAND_HANDLER(handle_profile_command)
                free(samples);
                return retval;
        }
+       uint32_t duration_ms = timeval_ms() - timestart_ms;
 
        assert(num_of_samples <= MAX_PROFILE_SAMPLE_NUM);
 
@@ -3985,7 +4114,7 @@ COMMAND_HANDLER(handle_profile_command)
        }
 
        write_gmon(samples, num_of_samples, CMD_ARGV[1],
-                  with_range, start_address, end_address, target);
+                  with_range, start_address, end_address, target, duration_ms);
        command_print(CMD_CTX, "Wrote %s", CMD_ARGV[1]);
 
        free(samples);
@@ -4055,8 +4184,9 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
         * argv[3] = memory address
         * argv[4] = count of times to read
         */
+
        if (argc < 4 || argc > 5) {
-               Jim_WrongNumArgs(interp, 1, argv, "varname width addr nelems [phys]");
+               Jim_WrongNumArgs(interp, 0, argv, "varname width addr nelems [phys]");
                return JIM_ERR;
        }
        varname = Jim_GetString(argv[0], &len);
@@ -4405,17 +4535,33 @@ void target_handle_event(struct target *target, enum target_event e)
 
        for (teap = target->event_action; teap != NULL; teap = teap->next) {
                if (teap->event == e) {
-                       LOG_DEBUG("target: (%d) %s (%s) event: %d (%s) action: %s",
+                       LOG_DEBUG("target(%d): %s (%s) event: %d (%s) action: %s",
                                           target->target_number,
                                           target_name(target),
                                           target_type_name(target),
                                           e,
                                           Jim_Nvp_value2name_simple(nvp_target_event, e)->name,
                                           Jim_GetString(teap->body, NULL));
+
+                       /* Override current target by the target an event
+                        * is issued from (lot of scripts need it).
+                        * Return back to previous override as soon
+                        * as the handler processing is done */
+                       struct command_context *cmd_ctx = current_command_context(teap->interp);
+                       struct target *saved_target_override = cmd_ctx->current_target_override;
+                       cmd_ctx->current_target_override = target;
+
                        if (Jim_EvalObj(teap->interp, teap->body) != JIM_OK) {
                                Jim_MakeErrorMessage(teap->interp);
-                               command_print(NULL, "%s\n", Jim_GetString(Jim_GetResult(teap->interp), NULL));
+                               LOG_USER("Error executing event %s on target %s:\n%s",
+                                                 Jim_Nvp_value2name_simple(nvp_target_event, e)->name,
+                                                 target_name(target),
+                                                 Jim_GetString(Jim_GetResult(teap->interp), NULL));
+                               /* clean both error code and stacktrace before return */
+                               Jim_Eval(teap->interp, "error \"\" \"\"");
                        }
+
+                       cmd_ctx->current_target_override = saved_target_override;
                }
        }
 }
@@ -4445,9 +4591,9 @@ enum target_cfg_param {
        TCFG_COREID,
        TCFG_CHAIN_POSITION,
        TCFG_DBGBASE,
-       TCFG_CTIBASE,
        TCFG_RTOS,
        TCFG_DEFER_EXAMINE,
+       TCFG_GDB_PORT,
 };
 
 static Jim_Nvp nvp_config_opts[] = {
@@ -4461,9 +4607,9 @@ static Jim_Nvp nvp_config_opts[] = {
        { .name = "-coreid",           .value = TCFG_COREID },
        { .name = "-chain-position",   .value = TCFG_CHAIN_POSITION },
        { .name = "-dbgbase",          .value = TCFG_DBGBASE },
-       { .name = "-ctibase",          .value = TCFG_CTIBASE },
        { .name = "-rtos",             .value = TCFG_RTOS },
        { .name = "-defer-examine",    .value = TCFG_DEFER_EXAMINE },
+       { .name = "-gdb-port",         .value = TCFG_GDB_PORT },
        { .name = NULL, .value = -1 }
 };
 
@@ -4690,7 +4836,7 @@ no_params:
                                if (goi->argc != 0)
                                        goto no_params;
                        }
-                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->working_area_size));
+                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->coreid));
                        /* loop for more */
                        break;
 
@@ -4698,6 +4844,13 @@ no_params:
                        if (goi->isconfigure) {
                                Jim_Obj *o_t;
                                struct jtag_tap *tap;
+
+                               if (target->has_dap) {
+                                       Jim_SetResultString(goi->interp,
+                                               "target requires -dap parameter instead of -chain-position!", -1);
+                                       return JIM_ERR;
+                               }
+
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Obj(goi, &o_t);
                                if (e != JIM_OK)
@@ -4705,8 +4858,8 @@ no_params:
                                tap = jtag_tap_by_jim_obj(goi->interp, o_t);
                                if (tap == NULL)
                                        return JIM_ERR;
-                               /* make this exactly 1 or 0 */
                                target->tap = tap;
+                               target->tap_configured = true;
                        } else {
                                if (goi->argc != 0)
                                        goto no_params;
@@ -4728,20 +4881,6 @@ no_params:
                        Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->dbgbase));
                        /* loop for more */
                        break;
-               case TCFG_CTIBASE:
-                       if (goi->isconfigure) {
-                               e = Jim_GetOpt_Wide(goi, &w);
-                               if (e != JIM_OK)
-                                       return e;
-                               target->ctibase = (uint32_t)w;
-                               target->ctibase_set = true;
-                       } else {
-                               if (goi->argc != 0)
-                                       goto no_params;
-                       }
-                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->ctibase));
-                       /* loop for more */
-                       break;
                case TCFG_RTOS:
                        /* RTOS */
                        {
@@ -4758,6 +4897,20 @@ no_params:
                        /* loop for more */
                        break;
 
+               case TCFG_GDB_PORT:
+                       if (goi->isconfigure) {
+                               const char *s;
+                               e = Jim_GetOpt_String(goi, &s, NULL);
+                               if (e != JIM_OK)
+                                       return e;
+                               target->gdb_port_override = strdup(s);
+                       } else {
+                               if (goi->argc != 0)
+                                       goto no_params;
+                       }
+                       Jim_SetResultString(goi->interp, target->gdb_port_override ? : "undefined", -1);
+                       /* loop for more */
+                       break;
                }
        } /* while (goi->argc) */
 
@@ -4781,228 +4934,6 @@ static int jim_target_configure(Jim_Interp *interp, int argc, Jim_Obj * const *a
        return target_configure(&goi, target);
 }
 
-static int jim_target_mw(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
-{
-       const char *cmd_name = Jim_GetString(argv[0], NULL);
-
-       Jim_GetOptInfo goi;
-       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
-
-       if (goi.argc < 2 || goi.argc > 4) {
-               Jim_SetResultFormatted(goi.interp,
-                               "usage: %s [phys] <address> <data> [<count>]", cmd_name);
-               return JIM_ERR;
-       }
-
-       target_write_fn fn;
-       fn = target_write_memory;
-
-       int e;
-       if (strcmp(Jim_GetString(argv[1], NULL), "phys") == 0) {
-               /* consume it */
-               struct Jim_Obj *obj;
-               e = Jim_GetOpt_Obj(&goi, &obj);
-               if (e != JIM_OK)
-                       return e;
-
-               fn = target_write_phys_memory;
-       }
-
-       jim_wide a;
-       e = Jim_GetOpt_Wide(&goi, &a);
-       if (e != JIM_OK)
-               return e;
-
-       jim_wide b;
-       e = Jim_GetOpt_Wide(&goi, &b);
-       if (e != JIM_OK)
-               return e;
-
-       jim_wide c = 1;
-       if (goi.argc == 1) {
-               e = Jim_GetOpt_Wide(&goi, &c);
-               if (e != JIM_OK)
-                       return e;
-       }
-
-       /* all args must be consumed */
-       if (goi.argc != 0)
-               return JIM_ERR;
-
-       struct target *target = Jim_CmdPrivData(goi.interp);
-       unsigned data_size;
-       if (strcasecmp(cmd_name, "mww") == 0)
-               data_size = 4;
-       else if (strcasecmp(cmd_name, "mwh") == 0)
-               data_size = 2;
-       else if (strcasecmp(cmd_name, "mwb") == 0)
-               data_size = 1;
-       else {
-               LOG_ERROR("command '%s' unknown: ", cmd_name);
-               return JIM_ERR;
-       }
-
-       return (target_fill_mem(target, a, fn, data_size, b, c) == ERROR_OK) ? JIM_OK : JIM_ERR;
-}
-
-/**
-*  @brief Reads an array of words/halfwords/bytes from target memory starting at specified address.
-*
-*  Usage: mdw [phys] <address> [<count>] - for 32 bit reads
-*         mdh [phys] <address> [<count>] - for 16 bit reads
-*         mdb [phys] <address> [<count>] - for  8 bit reads
-*
-*  Count defaults to 1.
-*
-*  Calls target_read_memory or target_read_phys_memory depending on
-*  the presence of the "phys" argument
-*  Reads the target memory in blocks of max. 32 bytes, and returns an array of ints formatted
-*  to int representation in base16.
-*  Also outputs read data in a human readable form using command_print
-*
-*  @param phys if present target_read_phys_memory will be used instead of target_read_memory
-*  @param address address where to start the read. May be specified in decimal or hex using the standard "0x" prefix
-*  @param count optional count parameter to read an array of values. If not specified, defaults to 1.
-*  @returns:  JIM_ERR on error or JIM_OK on success and sets the result string to an array of ascii formatted numbers
-*  on success, with [<count>] number of elements.
-*
-*  In case of little endian target:
-*      Example1: "mdw 0x00000000"  returns "10123456"
-*      Exmaple2: "mdh 0x00000000 1" returns "3456"
-*      Example3: "mdb 0x00000000" returns "56"
-*      Example4: "mdh 0x00000000 2" returns "3456 1012"
-*      Example5: "mdb 0x00000000 3" returns "56 34 12"
-**/
-static int jim_target_md(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
-{
-       const char *cmd_name = Jim_GetString(argv[0], NULL);
-
-       Jim_GetOptInfo goi;
-       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
-
-       if ((goi.argc < 1) || (goi.argc > 3)) {
-               Jim_SetResultFormatted(goi.interp,
-                               "usage: %s [phys] <address> [<count>]", cmd_name);
-               return JIM_ERR;
-       }
-
-       int (*fn)(struct target *target,
-                       target_addr_t address, uint32_t size, uint32_t count, uint8_t *buffer);
-       fn = target_read_memory;
-
-       int e;
-       if (strcmp(Jim_GetString(argv[1], NULL), "phys") == 0) {
-               /* consume it */
-               struct Jim_Obj *obj;
-               e = Jim_GetOpt_Obj(&goi, &obj);
-               if (e != JIM_OK)
-                       return e;
-
-               fn = target_read_phys_memory;
-       }
-
-       /* Read address parameter */
-       jim_wide addr;
-       e = Jim_GetOpt_Wide(&goi, &addr);
-       if (e != JIM_OK)
-               return JIM_ERR;
-
-       /* If next parameter exists, read it out as the count parameter, if not, set it to 1 (default) */
-       jim_wide count;
-       if (goi.argc == 1) {
-               e = Jim_GetOpt_Wide(&goi, &count);
-               if (e != JIM_OK)
-                       return JIM_ERR;
-       } else
-               count = 1;
-
-       /* all args must be consumed */
-       if (goi.argc != 0)
-               return JIM_ERR;
-
-       jim_wide dwidth = 1; /* shut up gcc */
-       if (strcasecmp(cmd_name, "mdw") == 0)
-               dwidth = 4;
-       else if (strcasecmp(cmd_name, "mdh") == 0)
-               dwidth = 2;
-       else if (strcasecmp(cmd_name, "mdb") == 0)
-               dwidth = 1;
-       else {
-               LOG_ERROR("command '%s' unknown: ", cmd_name);
-               return JIM_ERR;
-       }
-
-       /* convert count to "bytes" */
-       int bytes = count * dwidth;
-
-       struct target *target = Jim_CmdPrivData(goi.interp);
-       uint8_t  target_buf[32];
-       jim_wide x, y, z;
-       while (bytes > 0) {
-               y = (bytes < 16) ? bytes : 16; /* y = min(bytes, 16); */
-
-               /* Try to read out next block */
-               e = fn(target, addr, dwidth, y / dwidth, target_buf);
-
-               if (e != ERROR_OK) {
-                       Jim_SetResultFormatted(interp, "error reading target @ 0x%08lx", (long)addr);
-                       return JIM_ERR;
-               }
-
-               command_print_sameline(NULL, "0x%08x ", (int)(addr));
-               switch (dwidth) {
-               case 4:
-                       for (x = 0; x < 16 && x < y; x += 4) {
-                               z = target_buffer_get_u32(target, &(target_buf[x]));
-                               command_print_sameline(NULL, "%08x ", (int)(z));
-                       }
-                       for (; (x < 16) ; x += 4)
-                               command_print_sameline(NULL, "         ");
-                       break;
-               case 2:
-                       for (x = 0; x < 16 && x < y; x += 2) {
-                               z = target_buffer_get_u16(target, &(target_buf[x]));
-                               command_print_sameline(NULL, "%04x ", (int)(z));
-                       }
-                       for (; (x < 16) ; x += 2)
-                               command_print_sameline(NULL, "     ");
-                       break;
-               case 1:
-               default:
-                       for (x = 0 ; (x < 16) && (x < y) ; x += 1) {
-                               z = target_buffer_get_u8(target, &(target_buf[x]));
-                               command_print_sameline(NULL, "%02x ", (int)(z));
-                       }
-                       for (; (x < 16) ; x += 1)
-                               command_print_sameline(NULL, "   ");
-                       break;
-               }
-               /* ascii-ify the bytes */
-               for (x = 0 ; x < y ; x++) {
-                       if ((target_buf[x] >= 0x20) &&
-                               (target_buf[x] <= 0x7e)) {
-                               /* good */
-                       } else {
-                               /* smack it */
-                               target_buf[x] = '.';
-                       }
-               }
-               /* space pad  */
-               while (x < 16) {
-                       target_buf[x] = ' ';
-                       x++;
-               }
-               /* terminate */
-               target_buf[16] = 0;
-               /* print - with a newline */
-               command_print_sameline(NULL, "%s\n", target_buf);
-               /* NEXT... */
-               bytes -= 16;
-               addr += 16;
-       }
-       return JIM_OK;
-}
-
 static int jim_target_mem2array(Jim_Interp *interp,
                int argc, Jim_Obj *const *argv)
 {
@@ -5216,27 +5147,25 @@ static int jim_target_wait_state(Jim_Interp *interp, int argc, Jim_Obj *const *a
 /* List for human, Events defined for this target.
  * scripts/programs should use 'name cget -event NAME'
  */
-static int jim_target_event_list(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+COMMAND_HANDLER(handle_target_event_list)
 {
-       struct command_context *cmd_ctx = current_command_context(interp);
-       assert(cmd_ctx != NULL);
-
-       struct target *target = Jim_CmdPrivData(interp);
+       struct target *target = get_current_target(CMD_CTX);
        struct target_event_action *teap = target->event_action;
-       command_print(cmd_ctx, "Event actions for target (%d) %s\n",
+
+       command_print(CMD_CTX, "Event actions for target (%d) %s\n",
                                   target->target_number,
                                   target_name(target));
-       command_print(cmd_ctx, "%-25s | Body", "Event");
-       command_print(cmd_ctx, "------------------------- | "
+       command_print(CMD_CTX, "%-25s | Body", "Event");
+       command_print(CMD_CTX, "------------------------- | "
                        "----------------------------------------");
        while (teap) {
                Jim_Nvp *opt = Jim_Nvp_value2name_simple(nvp_target_event, teap->event);
-               command_print(cmd_ctx, "%-25s | %s",
+               command_print(CMD_CTX, "%-25s | %s",
                                opt->name, Jim_GetString(teap->body, NULL));
                teap = teap->next;
        }
-       command_print(cmd_ctx, "***END***");
-       return JIM_OK;
+       command_print(CMD_CTX, "***END***");
+       return ERROR_OK;
 }
 static int jim_target_current_state(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
@@ -5283,45 +5212,59 @@ static const struct command_registration target_instance_command_handlers[] = {
                .help  = "returns the specified target attribute",
                .usage = "target_attribute",
        },
+       {
+               .name = "mwd",
+               .handler = handle_mw_command,
+               .mode = COMMAND_EXEC,
+               .help = "Write 64-bit word(s) to target memory",
+               .usage = "address data [count]",
+       },
        {
                .name = "mww",
+               .handler = handle_mw_command,
                .mode = COMMAND_EXEC,
-               .jim_handler = jim_target_mw,
                .help = "Write 32-bit word(s) to target memory",
                .usage = "address data [count]",
        },
        {
                .name = "mwh",
+               .handler = handle_mw_command,
                .mode = COMMAND_EXEC,
-               .jim_handler = jim_target_mw,
                .help = "Write 16-bit half-word(s) to target memory",
                .usage = "address data [count]",
        },
        {
                .name = "mwb",
+               .handler = handle_mw_command,
                .mode = COMMAND_EXEC,
-               .jim_handler = jim_target_mw,
                .help = "Write byte(s) to target memory",
                .usage = "address data [count]",
        },
+       {
+               .name = "mdd",
+               .handler = handle_md_command,
+               .mode = COMMAND_EXEC,
+               .help = "Display target memory as 64-bit words",
+               .usage = "address [count]",
+       },
        {
                .name = "mdw",
+               .handler = handle_md_command,
                .mode = COMMAND_EXEC,
-               .jim_handler = jim_target_md,
                .help = "Display target memory as 32-bit words",
                .usage = "address [count]",
        },
        {
                .name = "mdh",
+               .handler = handle_md_command,
                .mode = COMMAND_EXEC,
-               .jim_handler = jim_target_md,
                .help = "Display target memory as 16-bit half-words",
                .usage = "address [count]",
        },
        {
                .name = "mdb",
+               .handler = handle_md_command,
                .mode = COMMAND_EXEC,
-               .jim_handler = jim_target_md,
                .help = "Display target memory as 8-bit bytes",
                .usage = "address [count]",
        },
@@ -5343,9 +5286,10 @@ static const struct command_registration target_instance_command_handlers[] = {
        },
        {
                .name = "eventlist",
+               .handler = handle_target_event_list,
                .mode = COMMAND_EXEC,
-               .jim_handler = jim_target_event_list,
                .help = "displays a table of events defined for this target",
+               .usage = "",
        },
        {
                .name = "curstate",
@@ -5358,21 +5302,19 @@ static const struct command_registration target_instance_command_handlers[] = {
                .mode = COMMAND_EXEC,
                .jim_handler = jim_target_examine,
                .help = "used internally for reset processing",
-               .usage = "arp_examine ['allow-defer']",
+               .usage = "['allow-defer']",
        },
        {
                .name = "was_examined",
                .mode = COMMAND_EXEC,
                .jim_handler = jim_target_was_examined,
                .help = "used internally for reset processing",
-               .usage = "was_examined",
        },
        {
                .name = "examine_deferred",
                .mode = COMMAND_EXEC,
                .jim_handler = jim_target_examine_deferred,
                .help = "used internally for reset processing",
-               .usage = "examine_deferred",
        },
        {
                .name = "arp_halt_gdb",
@@ -5493,7 +5435,7 @@ static int target_create(Jim_GetOptInfo *goi)
        target = calloc(1, sizeof(struct target));
        /* set target number */
        target->target_number = new_target_number();
-       cmd_ctx->current_target = target->target_number;
+       cmd_ctx->current_target = target;
 
        /* allocate memory for each unique target type */
        target->type = calloc(1, sizeof(struct target_type));
@@ -5519,7 +5461,7 @@ static int target_create(Jim_GetOptInfo *goi)
        target->next                = NULL;
        target->arch_info           = NULL;
 
-       target->display             = 1;
+       target->verbose_halt_msg        = true;
 
        target->halt_issued                     = false;
 
@@ -5534,16 +5476,31 @@ static int target_create(Jim_GetOptInfo *goi)
        target->rtos = NULL;
        target->rtos_auto_detect = false;
 
+       target->gdb_port_override = NULL;
+
        /* Do the rest as "configure" options */
        goi->isconfigure = 1;
        e = target_configure(goi, target);
 
-       if (target->tap == NULL) {
-               Jim_SetResultString(goi->interp, "-chain-position required when creating target", -1);
-               e = JIM_ERR;
+       if (e == JIM_OK) {
+               if (target->has_dap) {
+                       if (!target->dap_configured) {
+                               Jim_SetResultString(goi->interp, "-dap ?name? required when creating target", -1);
+                               e = JIM_ERR;
+                       }
+               } else {
+                       if (!target->tap_configured) {
+                               Jim_SetResultString(goi->interp, "-chain-position ?name? required when creating target", -1);
+                               e = JIM_ERR;
+                       }
+               }
+               /* tap must be set after target was configured */
+               if (target->tap == NULL)
+                       e = JIM_ERR;
        }
 
        if (e != JIM_OK) {
+               free(target->gdb_port_override);
                free(target->type);
                free(target);
                return e;
@@ -5557,14 +5514,24 @@ static int target_create(Jim_GetOptInfo *goi)
        cp = Jim_GetString(new_cmd, NULL);
        target->cmd_name = strdup(cp);
 
+       if (target->type->target_create) {
+               e = (*(target->type->target_create))(target, goi->interp);
+               if (e != ERROR_OK) {
+                       LOG_DEBUG("target_create failed");
+                       free(target->gdb_port_override);
+                       free(target->type);
+                       free(target->cmd_name);
+                       free(target);
+                       return JIM_ERR;
+               }
+       }
+
        /* create the target specific commands */
        if (target->type->commands) {
                e = register_commands(cmd_ctx, NULL, target->type->commands);
                if (ERROR_OK != e)
                        LOG_ERROR("unable to register '%s' commands", cp);
        }
-       if (target->type->target_create)
-               (*(target->type->target_create))(target, goi->interp);
 
        /* append to end of list */
        {
@@ -5719,11 +5686,11 @@ static const struct command_registration target_subcommand_handlers[] = {
                .mode = COMMAND_CONFIG,
                .handler = handle_target_init_command,
                .help = "initialize targets",
+               .usage = "",
        },
        {
                .name = "create",
-               /* REVISIT this should be COMMAND_CONFIG ... */
-               .mode = COMMAND_ANY,
+               .mode = COMMAND_CONFIG,
                .jim_handler = jim_target_create,
                .usage = "name type '-chain-position' name [options ...]",
                .help = "Creates and selects a new target",
@@ -5926,8 +5893,8 @@ static const struct command_registration target_command_handlers[] = {
                .name = "target",
                .mode = COMMAND_CONFIG,
                .help = "configure target",
-
                .chain = target_subcommand_handlers,
+               .usage = "",
        },
        COMMAND_REGISTRATION_DONE
 };
@@ -6261,7 +6228,7 @@ static const struct command_registration target_exec_command_handlers[] = {
                .name = "mdd",
                .handler = handle_md_command,
                .mode = COMMAND_EXEC,
-               .help = "display memory words",
+               .help = "display memory double-words",
                .usage = "['phys'] address [count]",
        },
        {
@@ -6289,7 +6256,7 @@ static const struct command_registration target_exec_command_handlers[] = {
                .name = "mwd",
                .handler = handle_mw_command,
                .mode = COMMAND_EXEC,
-               .help = "write memory word",
+               .help = "write memory double-word",
                .usage = "['phys'] address value [count]",
        },
        {
@@ -6318,7 +6285,7 @@ static const struct command_registration target_exec_command_handlers[] = {
                .handler = handle_bp_command,
                .mode = COMMAND_EXEC,
                .help = "list or set hardware or software breakpoint",
-               .usage = "<address> [<asid>]<length> ['hw'|'hw_ctx']",
+               .usage = "<address> [<asid>] <length> ['hw'|'hw_ctx']",
        },
        {
                .name = "rbp",

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