Mac/PPC: Fix build.
[openocd.git] / src / target / target.c
index 88fea1778f21ae0165c07be8ba15368d0cd366b9..6f458bcebe63d378a3cda378a5c1957a84798a4a 100644 (file)
@@ -2,7 +2,7 @@
  *   Copyright (C) 2005 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
- *   Copyright (C) 2007-2009 Øyvind Harboe                                 *
+ *   Copyright (C) 2007-2010 Øyvind Harboe                                 *
  *   oyvind.harboe@zylin.com                                               *
  *                                                                         *
  *   Copyright (C) 2008, Duane Ellis                                       *
  *   Copyright (C) 2008 by Rick Altherr                                    *
  *   kc8apf@kc8apf.net>                                                    *
  *                                                                         *
+ *   Copyright (C) 2011 by Broadcom Corporation                            *
+ *   Evan Hunter - ehunter@broadcom.com                                    *
+ *                                                                         *
+ *   Copyright (C) ST-Ericsson SA 2011                                     *
+ *   michel.jaouen@stericsson.com : smp minimum support                    *
+ *                                                                         *
+ *   Copyright (C) 2011 Andreas Fritiofson                                 *
+ *   andreas.fritiofson@gmail.com                                          *
+ *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program; if not, write to the                         *
  *   Free Software Foundation, Inc.,                                       *
- *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  ***************************************************************************/
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
+#include <helper/time_support.h>
+#include <jtag/jtag.h>
+#include <flash/nor/core.h>
+
 #include "target.h"
 #include "target_type.h"
 #include "target_request.h"
 #include "breakpoints.h"
-#include "time_support.h"
 #include "register.h"
 #include "trace.h"
 #include "image.h"
-#include "jtag.h"
-
-
-static int jim_mcrmrc(Jim_Interp *interp, int argc, Jim_Obj *const *argv);
-
-static int target_array2mem(Jim_Interp *interp, struct target *target, int argc, Jim_Obj *const *argv);
-static int target_mem2array(Jim_Interp *interp, struct target *target, int argc, Jim_Obj *const *argv);
+#include "rtos/rtos.h"
+#include "transport/transport.h"
+
+/* default halt wait timeout (ms) */
+#define DEFAULT_HALT_TIMEOUT 5000
+
+static int target_read_buffer_default(struct target *target, uint32_t address,
+               uint32_t count, uint8_t *buffer);
+static int target_write_buffer_default(struct target *target, uint32_t address,
+               uint32_t count, const uint8_t *buffer);
+static int target_array2mem(Jim_Interp *interp, struct target *target,
+               int argc, Jim_Obj * const *argv);
+static int target_mem2array(Jim_Interp *interp, struct target *target,
+               int argc, Jim_Obj * const *argv);
+static int target_register_user_commands(struct command_context *cmd_ctx);
+static int target_get_gdb_fileio_info_default(struct target *target,
+               struct gdb_fileio_info *fileio_info);
+static int target_gdb_fileio_end_default(struct target *target, int retcode,
+               int fileio_errno, bool ctrl_c);
+static int target_profiling_default(struct target *target, uint32_t *samples,
+               uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds);
 
 /* targets */
 extern struct target_type arm7tdmi_target;
@@ -55,42 +82,66 @@ extern struct target_type arm720t_target;
 extern struct target_type arm9tdmi_target;
 extern struct target_type arm920t_target;
 extern struct target_type arm966e_target;
+extern struct target_type arm946e_target;
 extern struct target_type arm926ejs_target;
 extern struct target_type fa526_target;
 extern struct target_type feroceon_target;
 extern struct target_type dragonite_target;
 extern struct target_type xscale_target;
-extern struct target_type cortexm3_target;
-extern struct target_type cortexa8_target;
+extern struct target_type cortexm_target;
+extern struct target_type cortexa_target;
+extern struct target_type cortexr4_target;
 extern struct target_type arm11_target;
 extern struct target_type mips_m4k_target;
 extern struct target_type avr_target;
-
-struct target_type *target_types[] =
-{
+extern struct target_type dsp563xx_target;
+extern struct target_type dsp5680xx_target;
+extern struct target_type testee_target;
+extern struct target_type avr32_ap7k_target;
+extern struct target_type hla_target;
+extern struct target_type nds32_v2_target;
+extern struct target_type nds32_v3_target;
+extern struct target_type nds32_v3m_target;
+extern struct target_type or1k_target;
+extern struct target_type quark_x10xx_target;
+
+static struct target_type *target_types[] = {
        &arm7tdmi_target,
        &arm9tdmi_target,
        &arm920t_target,
        &arm720t_target,
        &arm966e_target,
+       &arm946e_target,
        &arm926ejs_target,
        &fa526_target,
        &feroceon_target,
        &dragonite_target,
        &xscale_target,
-       &cortexm3_target,
-       &cortexa8_target,
+       &cortexm_target,
+       &cortexa_target,
+       &cortexr4_target,
        &arm11_target,
        &mips_m4k_target,
        &avr_target,
+       &dsp563xx_target,
+       &dsp5680xx_target,
+       &testee_target,
+       &avr32_ap7k_target,
+       &hla_target,
+       &nds32_v2_target,
+       &nds32_v3_target,
+       &nds32_v3m_target,
+       &or1k_target,
+       &quark_x10xx_target,
        NULL,
 };
 
-struct target *all_targets = NULL;
-struct target_event_callback *target_event_callbacks = NULL;
-struct target_timer_callback *target_timer_callbacks = NULL;
+struct target *all_targets;
+static struct target_event_callback *target_event_callbacks;
+static struct target_timer_callback *target_timer_callbacks;
+static const int polling_interval = 100;
 
-const Jim_Nvp nvp_assert[] = {
+static const Jim_Nvp nvp_assert[] = {
        { .name = "assert", NVP_ASSERT },
        { .name = "deassert", NVP_DEASSERT },
        { .name = "T", NVP_ASSERT },
@@ -100,7 +151,7 @@ const Jim_Nvp nvp_assert[] = {
        { .name = NULL, .value = -1 }
 };
 
-const Jim_Nvp nvp_error_target[] = {
+static const Jim_Nvp nvp_error_target[] = {
        { .value = ERROR_TARGET_INVALID, .name = "err-invalid" },
        { .value = ERROR_TARGET_INIT_FAILED, .name = "err-init-failed" },
        { .value = ERROR_TARGET_TIMEOUT, .name = "err-timeout" },
@@ -115,21 +166,18 @@ const Jim_Nvp nvp_error_target[] = {
        { .value = -1, .name = NULL }
 };
 
-const char *target_strerror_safe(int err)
+static const char *target_strerror_safe(int err)
 {
        const Jim_Nvp *n;
 
        n = Jim_Nvp_value2name_simple(nvp_error_target, err);
-       if (n->name == NULL) {
+       if (n->name == NULL)
                return "unknown";
-       } else {
+       else
                return n->name;
-       }
 }
 
 static const Jim_Nvp nvp_target_event[] = {
-       { .value = TARGET_EVENT_OLD_gdb_program_config , .name = "old-gdb_program_config" },
-       { .value = TARGET_EVENT_OLD_pre_resume         , .name = "old-pre_resume" },
 
        { .value = TARGET_EVENT_GDB_HALT, .name = "gdb-halt" },
        { .value = TARGET_EVENT_HALTED, .name = "halted" },
@@ -140,11 +188,9 @@ static const Jim_Nvp nvp_target_event[] = {
        { .name = "gdb-start", .value = TARGET_EVENT_GDB_START },
        { .name = "gdb-end", .value = TARGET_EVENT_GDB_END },
 
-       /* historical name */
-
-       { .value = TARGET_EVENT_RESET_START, .name = "reset-start" },
-
+       { .value = TARGET_EVENT_RESET_START,         .name = "reset-start" },
        { .value = TARGET_EVENT_RESET_ASSERT_PRE,    .name = "reset-assert-pre" },
+       { .value = TARGET_EVENT_RESET_ASSERT,        .name = "reset-assert" },
        { .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" },
@@ -152,8 +198,8 @@ static const Jim_Nvp nvp_target_event[] = {
        { .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" },
+       { .value = TARGET_EVENT_RESET_INIT,          .name = "reset-init" },
+       { .value = TARGET_EVENT_RESET_END,           .name = "reset-end" },
 
        { .value = TARGET_EVENT_EXAMINE_START, .name = "examine-start" },
        { .value = TARGET_EVENT_EXAMINE_END, .name = "examine-end" },
@@ -170,14 +216,10 @@ static const Jim_Nvp nvp_target_event[] = {
        { .value = TARGET_EVENT_GDB_FLASH_ERASE_START, .name = "gdb-flash-erase-start" },
        { .value = TARGET_EVENT_GDB_FLASH_ERASE_END  , .name = "gdb-flash-erase-end" },
 
-       { .value = TARGET_EVENT_RESUME_START, .name = "resume-start" },
-       { .value = TARGET_EVENT_RESUMED     , .name = "resume-ok" },
-       { .value = TARGET_EVENT_RESUME_END  , .name = "resume-end" },
-
        { .name = NULL, .value = -1 }
 };
 
-const Jim_Nvp nvp_target_state[] = {
+static const Jim_Nvp nvp_target_state[] = {
        { .name = "unknown", .value = TARGET_UNKNOWN },
        { .name = "running", .value = TARGET_RUNNING },
        { .name = "halted",  .value = TARGET_HALTED },
@@ -186,18 +228,19 @@ const Jim_Nvp nvp_target_state[] = {
        { .name = NULL, .value = -1 },
 };
 
-const Jim_Nvp nvp_target_debug_reason [] = {
+static const Jim_Nvp nvp_target_debug_reason[] = {
        { .name = "debug-request"            , .value = DBG_REASON_DBGRQ },
        { .name = "breakpoint"               , .value = DBG_REASON_BREAKPOINT },
        { .name = "watchpoint"               , .value = DBG_REASON_WATCHPOINT },
        { .name = "watchpoint-and-breakpoint", .value = DBG_REASON_WPTANDBKPT },
        { .name = "single-step"              , .value = DBG_REASON_SINGLESTEP },
        { .name = "target-not-halted"        , .value = DBG_REASON_NOTHALTED  },
+       { .name = "program-exit"             , .value = DBG_REASON_EXIT },
        { .name = "undefined"                , .value = DBG_REASON_UNDEFINED },
        { .name = NULL, .value = -1 },
 };
 
-const Jim_Nvp nvp_target_endian[] = {
+static const Jim_Nvp nvp_target_endian[] = {
        { .name = "big",    .value = TARGET_BIG_ENDIAN },
        { .name = "little", .value = TARGET_LITTLE_ENDIAN },
        { .name = "be",     .value = TARGET_BIG_ENDIAN },
@@ -205,7 +248,7 @@ const Jim_Nvp nvp_target_endian[] = {
        { .name = NULL,     .value = -1 },
 };
 
-const Jim_Nvp nvp_reset_modes[] = {
+static const Jim_Nvp nvp_reset_modes[] = {
        { .name = "unknown", .value = RESET_UNKNOWN },
        { .name = "run"    , .value = RESET_RUN },
        { .name = "halt"   , .value = RESET_HALT },
@@ -213,12 +256,24 @@ const Jim_Nvp nvp_reset_modes[] = {
        { .name = NULL     , .value = -1 },
 };
 
-const char *
-target_state_name( struct target *t )
+const char *debug_reason_name(struct target *t)
+{
+       const char *cp;
+
+       cp = Jim_Nvp_value2name_simple(nvp_target_debug_reason,
+                       t->debug_reason)->name;
+       if (!cp) {
+               LOG_ERROR("Invalid debug reason: %d", (int)(t->debug_reason));
+               cp = "(*BUG*unknown*BUG*)";
+       }
+       return cp;
+}
+
+const char *target_state_name(struct target *t)
 {
        const char *cp;
        cp = Jim_Nvp_value2name_simple(nvp_target_state, t->state)->name;
-       if( !cp ){
+       if (!cp) {
                LOG_ERROR("Invalid target state: %d", (int)(t->state));
                cp = "(*BUG*unknown*BUG*)";
        }
@@ -235,14 +290,22 @@ static int new_target_number(void)
        x = -1;
        t = all_targets;
        while (t) {
-               if (x < t->target_number) {
+               if (x < t->target_number)
                        x = t->target_number;
-               }
                t = t->next;
        }
        return x + 1;
 }
 
+/* read a uint64_t from a buffer in target memory endianness */
+uint64_t target_buffer_get_u64(struct target *target, const uint8_t *buffer)
+{
+       if (target->endianness == TARGET_LITTLE_ENDIAN)
+               return le_to_h_u64(buffer);
+       else
+               return be_to_h_u64(buffer);
+}
+
 /* read a uint32_t from a buffer in target memory endianness */
 uint32_t target_buffer_get_u32(struct target *target, const uint8_t *buffer)
 {
@@ -252,6 +315,15 @@ uint32_t target_buffer_get_u32(struct target *target, const uint8_t *buffer)
                return be_to_h_u32(buffer);
 }
 
+/* read a uint24_t from a buffer in target memory endianness */
+uint32_t target_buffer_get_u24(struct target *target, const uint8_t *buffer)
+{
+       if (target->endianness == TARGET_LITTLE_ENDIAN)
+               return le_to_h_u24(buffer);
+       else
+               return be_to_h_u24(buffer);
+}
+
 /* read a uint16_t from a buffer in target memory endianness */
 uint16_t target_buffer_get_u16(struct target *target, const uint8_t *buffer)
 {
@@ -262,11 +334,20 @@ uint16_t target_buffer_get_u16(struct target *target, const uint8_t *buffer)
 }
 
 /* read a uint8_t from a buffer in target memory endianness */
-uint8_t target_buffer_get_u8(struct target *target, const uint8_t *buffer)
+static uint8_t target_buffer_get_u8(struct target *target, const uint8_t *buffer)
 {
        return *buffer & 0x0ff;
 }
 
+/* write a uint64_t to a buffer in target memory endianness */
+void target_buffer_set_u64(struct target *target, uint8_t *buffer, uint64_t value)
+{
+       if (target->endianness == TARGET_LITTLE_ENDIAN)
+               h_u64_to_le(buffer, value);
+       else
+               h_u64_to_be(buffer, value);
+}
+
 /* write a uint32_t to a buffer in target memory endianness */
 void target_buffer_set_u32(struct target *target, uint8_t *buffer, uint32_t value)
 {
@@ -276,6 +357,15 @@ void target_buffer_set_u32(struct target *target, uint8_t *buffer, uint32_t valu
                h_u32_to_be(buffer, value);
 }
 
+/* write a uint24_t to a buffer in target memory endianness */
+void target_buffer_set_u24(struct target *target, uint8_t *buffer, uint32_t value)
+{
+       if (target->endianness == TARGET_LITTLE_ENDIAN)
+               h_u24_to_le(buffer, value);
+       else
+               h_u24_to_be(buffer, value);
+}
+
 /* write a uint16_t to a buffer in target memory endianness */
 void target_buffer_set_u16(struct target *target, uint8_t *buffer, uint16_t value)
 {
@@ -286,11 +376,59 @@ void target_buffer_set_u16(struct target *target, uint8_t *buffer, uint16_t valu
 }
 
 /* write a uint8_t to a buffer in target memory endianness */
-void target_buffer_set_u8(struct target *target, uint8_t *buffer, uint8_t value)
+static void target_buffer_set_u8(struct target *target, uint8_t *buffer, uint8_t value)
 {
        *buffer = value;
 }
 
+/* write a uint64_t array to a buffer in target memory endianness */
+void target_buffer_get_u64_array(struct target *target, const uint8_t *buffer, uint32_t count, uint64_t *dstbuf)
+{
+       uint32_t i;
+       for (i = 0; i < count; i++)
+               dstbuf[i] = target_buffer_get_u64(target, &buffer[i * 8]);
+}
+
+/* write a uint32_t array to a buffer in target memory endianness */
+void target_buffer_get_u32_array(struct target *target, const uint8_t *buffer, uint32_t count, uint32_t *dstbuf)
+{
+       uint32_t i;
+       for (i = 0; i < count; i++)
+               dstbuf[i] = target_buffer_get_u32(target, &buffer[i * 4]);
+}
+
+/* write a uint16_t array to a buffer in target memory endianness */
+void target_buffer_get_u16_array(struct target *target, const uint8_t *buffer, uint32_t count, uint16_t *dstbuf)
+{
+       uint32_t i;
+       for (i = 0; i < count; i++)
+               dstbuf[i] = target_buffer_get_u16(target, &buffer[i * 2]);
+}
+
+/* write a uint64_t array to a buffer in target memory endianness */
+void target_buffer_set_u64_array(struct target *target, uint8_t *buffer, uint32_t count, const uint64_t *srcbuf)
+{
+       uint32_t i;
+       for (i = 0; i < count; i++)
+               target_buffer_set_u64(target, &buffer[i * 8], srcbuf[i]);
+}
+
+/* write a uint32_t array to a buffer in target memory endianness */
+void target_buffer_set_u32_array(struct target *target, uint8_t *buffer, uint32_t count, const uint32_t *srcbuf)
+{
+       uint32_t i;
+       for (i = 0; i < count; i++)
+               target_buffer_set_u32(target, &buffer[i * 4], srcbuf[i]);
+}
+
+/* write a uint16_t array to a buffer in target memory endianness */
+void target_buffer_set_u16_array(struct target *target, uint8_t *buffer, uint32_t count, const uint16_t *srcbuf)
+{
+       uint32_t i;
+       for (i = 0; i < count; i++)
+               target_buffer_set_u16(target, &buffer[i * 2], srcbuf[i]);
+}
+
 /* return a pointer to a configured target; id is name or number */
 struct target *get_target(const char *id)
 {
@@ -298,9 +436,9 @@ struct target *get_target(const char *id)
 
        /* try as tcltarget name */
        for (target = all_targets; target; target = target->next) {
-               if (target->cmd_name == NULL)
+               if (target_name(target) == NULL)
                        continue;
-               if (strcmp(id, target->cmd_name) == 0)
+               if (strcmp(id, target_name(target)) == 0)
                        return target;
        }
 
@@ -314,7 +452,7 @@ struct target *get_target(const char *id)
        for (target = all_targets; target; target = target->next) {
                if (target->target_number == (int)num) {
                        LOG_WARNING("use '%s' as target identifier, not '%u'",
-                                       target->cmd_name, num);
+                                       target_name(target), num);
                        return target;
                }
        }
@@ -328,21 +466,19 @@ static struct target *get_target_by_num(int num)
        struct target *target = all_targets;
 
        while (target) {
-               if (target->target_number == num) {
+               if (target->target_number == num)
                        return target;
-               }
                target = target->next;
        }
 
        return NULL;
 }
 
-struct targetget_current_target(struct command_context *cmd_ctx)
+struct target *get_current_target(struct command_context *cmd_ctx)
 {
        struct target *target = get_target_by_num(cmd_ctx->current_target);
 
-       if (target == NULL)
-       {
+       if (target == NULL) {
                LOG_ERROR("BUG: current_target out of bounds");
                exit(-1);
        }
@@ -355,8 +491,7 @@ int target_poll(struct target *target)
        int retval;
 
        /* We can't poll until after examine */
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                /* Fail silently lest we pollute the log */
                return ERROR_FAIL;
        }
@@ -365,16 +500,12 @@ int target_poll(struct target *target)
        if (retval != ERROR_OK)
                return retval;
 
-       if (target->halt_issued)
-       {
+       if (target->halt_issued) {
                if (target->state == TARGET_HALTED)
-               {
                        target->halt_issued = false;
-               } else
-               {
+               else {
                        long long t = timeval_ms() - target->halt_issued_time;
-                       if (t>1000)
-                       {
+                       if (t > DEFAULT_HALT_TIMEOUT) {
                                target->halt_issued = false;
                                LOG_INFO("Halt timed out, wake up GDB.");
                                target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
@@ -389,8 +520,7 @@ int target_halt(struct target *target)
 {
        int retval;
        /* We can't poll until after examine */
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
@@ -405,28 +535,62 @@ int target_halt(struct target *target)
        return ERROR_OK;
 }
 
+/**
+ * Make the target (re)start executing using its saved execution
+ * context (possibly with some modifications).
+ *
+ * @param target Which target should start executing.
+ * @param current True to use the target's saved program counter instead
+ *     of the address parameter
+ * @param address Optionally used as the program counter.
+ * @param handle_breakpoints True iff breakpoints at the resumption PC
+ *     should be skipped.  (For example, maybe execution was stopped by
+ *     such a breakpoint, in which case it would be counterprodutive to
+ *     let it re-trigger.
+ * @param debug_execution False if all working areas allocated by OpenOCD
+ *     should be released and/or restored to their original contents.
+ *     (This would for example be true to run some downloaded "helper"
+ *     algorithm code, which resides in one such working buffer and uses
+ *     another for data storage.)
+ *
+ * @todo Resolve the ambiguity about what the "debug_execution" flag
+ * signifies.  For example, Target implementations don't agree on how
+ * it relates to invalidation of the register cache, or to whether
+ * breakpoints and watchpoints should be enabled.  (It would seem wrong
+ * to enable breakpoints when running downloaded "helper" algorithms
+ * (debug_execution true), since the breakpoints would be set to match
+ * target firmware being debugged, not the helper algorithm.... and
+ * enabling them could cause such helpers to malfunction (for example,
+ * by overwriting data with a breakpoint instruction.  On the other
+ * hand the infrastructure for running such helpers might use this
+ * procedure but rely on hardware breakpoint to detect termination.)
+ */
 int target_resume(struct target *target, int current, uint32_t address, int handle_breakpoints, int debug_execution)
 {
        int retval;
 
        /* We can't poll until after examine */
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
 
-       /* note that resume *must* be asynchronous. The CPU can halt before we poll. The CPU can
-        * even halt at the current PC as a result of a software breakpoint being inserted by (a bug?)
-        * the application.
+       target_call_event_callbacks(target, TARGET_EVENT_RESUME_START);
+
+       /* note that resume *must* be asynchronous. The CPU can halt before
+        * we poll. The CPU can even halt at the current PC as a result of
+        * a software breakpoint being inserted by (a bug?) the application.
         */
-       if ((retval = target->type->resume(target, current, address, handle_breakpoints, debug_execution)) != ERROR_OK)
+       retval = target->type->resume(target, current, address, handle_breakpoints, debug_execution);
+       if (retval != ERROR_OK)
                return retval;
 
+       target_call_event_callbacks(target, TARGET_EVENT_RESUME_END);
+
        return retval;
 }
 
-int target_process_reset(struct command_context *cmd_ctx, enum target_reset_mode reset_mode)
+static int target_process_reset(struct command_context *cmd_ctx, enum target_reset_mode reset_mode)
 {
        char buf[100];
        int retval;
@@ -446,18 +610,25 @@ int target_process_reset(struct command_context *cmd_ctx, enum target_reset_mode
        jtag_poll_set_enabled(false);
 
        sprintf(buf, "ocd_process_reset %s", n->name);
-       retval = Jim_Eval(interp, buf);
+       retval = Jim_Eval(cmd_ctx->interp, buf);
 
        jtag_poll_set_enabled(save_poll);
 
        if (retval != JIM_OK) {
-               Jim_PrintErrorMessage(interp);
+               Jim_MakeErrorMessage(cmd_ctx->interp);
+               command_print(NULL, "%s\n", Jim_GetString(Jim_GetResult(cmd_ctx->interp), NULL));
                return ERROR_FAIL;
        }
 
        /* We want any events to be processed before the prompt */
        retval = target_call_timer_callbacks_now();
 
+       struct target *target;
+       for (target = all_targets; target; target = target->next) {
+               target->type->check_reset(target);
+               target->running_alg = false;
+       }
+
        return retval;
 }
 
@@ -480,6 +651,12 @@ static int default_examine(struct target *target)
        return ERROR_OK;
 }
 
+/* no check by default */
+static int default_check_reset(struct target *target)
+{
+       return ERROR_OK;
+}
+
 int target_examine_one(struct target *target)
 {
        return target->type->examine(target);
@@ -493,9 +670,17 @@ static int jtag_enable_callback(enum jtag_event event, void *priv)
                return ERROR_OK;
 
        jtag_unregister_event_callback(jtag_enable_callback, target);
-       return target_examine_one(target);
-}
 
+       target_call_event_callbacks(target, TARGET_EVENT_EXAMINE_START);
+
+       int retval = target_examine_one(target);
+       if (retval != ERROR_OK)
+               return retval;
+
+       target_call_event_callbacks(target, TARGET_EVENT_EXAMINE_END);
+
+       return retval;
+}
 
 /* Targets that correctly implement init + examine, i.e.
  * no communication with target during init:
@@ -507,104 +692,374 @@ int target_examine(void)
        int retval = ERROR_OK;
        struct target *target;
 
-       for (target = all_targets; target; target = target->next)
-       {
+       for (target = all_targets; target; target = target->next) {
                /* defer examination, but don't skip it */
                if (!target->tap->enabled) {
                        jtag_register_event_callback(jtag_enable_callback,
                                        target);
                        continue;
                }
-               if ((retval = target_examine_one(target)) != ERROR_OK)
+
+               target_call_event_callbacks(target, TARGET_EVENT_EXAMINE_START);
+
+               retval = target_examine_one(target);
+               if (retval != ERROR_OK)
                        return retval;
+
+               target_call_event_callbacks(target, TARGET_EVENT_EXAMINE_END);
        }
        return retval;
 }
-const char *target_get_name(struct target *target)
+
+const char *target_type_name(struct target *target)
 {
        return target->type->name;
 }
 
-static int target_write_memory_imp(struct target *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+static int target_soft_reset_halt(struct target *target)
 {
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
-       return target->type->write_memory_imp(target, address, size, count, buffer);
+       if (!target->type->soft_reset_halt) {
+               LOG_ERROR("Target %s does not support soft_reset_halt",
+                               target_name(target));
+               return ERROR_FAIL;
+       }
+       return target->type->soft_reset_halt(target);
 }
 
-static int target_read_memory_imp(struct target *target, uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+/**
+ * Downloads a target-specific native code algorithm to the target,
+ * and executes it.  * Note that some targets may need to set up, enable,
+ * and tear down a breakpoint (hard or * soft) to detect algorithm
+ * termination, while others may support  lower overhead schemes where
+ * soft breakpoints embedded in the algorithm automatically terminate the
+ * algorithm.
+ *
+ * @param target used to run the algorithm
+ * @param arch_info target-specific description of the algorithm.
+ */
+int target_run_algorithm(struct target *target,
+               int num_mem_params, struct mem_param *mem_params,
+               int num_reg_params, struct reg_param *reg_param,
+               uint32_t entry_point, uint32_t exit_point,
+               int timeout_ms, void *arch_info)
 {
-       if (!target_was_examined(target))
-       {
+       int retval = ERROR_FAIL;
+
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
-               return ERROR_FAIL;
+               goto done;
+       }
+       if (!target->type->run_algorithm) {
+               LOG_ERROR("Target type '%s' does not support %s",
+                               target_type_name(target), __func__);
+               goto done;
        }
-       return target->type->read_memory_imp(target, address, size, count, buffer);
+
+       target->running_alg = true;
+       retval = target->type->run_algorithm(target,
+                       num_mem_params, mem_params,
+                       num_reg_params, reg_param,
+                       entry_point, exit_point, timeout_ms, arch_info);
+       target->running_alg = false;
+
+done:
+       return retval;
 }
 
-static int target_soft_reset_halt_imp(struct target *target)
+/**
+ * Downloads a target-specific native code algorithm to the target,
+ * executes and leaves it running.
+ *
+ * @param target used to run the algorithm
+ * @param arch_info target-specific description of the algorithm.
+ */
+int target_start_algorithm(struct target *target,
+               int num_mem_params, struct mem_param *mem_params,
+               int num_reg_params, struct reg_param *reg_params,
+               uint32_t entry_point, uint32_t exit_point,
+               void *arch_info)
 {
-       if (!target_was_examined(target))
-       {
+       int retval = ERROR_FAIL;
+
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
-               return ERROR_FAIL;
+               goto done;
        }
-       if (!target->type->soft_reset_halt_imp) {
-               LOG_ERROR("Target %s does not support soft_reset_halt",
-                               target->cmd_name);
-               return ERROR_FAIL;
+       if (!target->type->start_algorithm) {
+               LOG_ERROR("Target type '%s' does not support %s",
+                               target_type_name(target), __func__);
+               goto done;
+       }
+       if (target->running_alg) {
+               LOG_ERROR("Target is already running an algorithm");
+               goto done;
        }
-       return target->type->soft_reset_halt_imp(target);
+
+       target->running_alg = true;
+       retval = target->type->start_algorithm(target,
+                       num_mem_params, mem_params,
+                       num_reg_params, reg_params,
+                       entry_point, exit_point, arch_info);
+
+done:
+       return retval;
 }
 
-static int target_run_algorithm_imp(struct target *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_param, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info)
+/**
+ * Waits for an algorithm started with target_start_algorithm() to complete.
+ *
+ * @param target used to run the algorithm
+ * @param arch_info target-specific description of the algorithm.
+ */
+int target_wait_algorithm(struct target *target,
+               int num_mem_params, struct mem_param *mem_params,
+               int num_reg_params, struct reg_param *reg_params,
+               uint32_t exit_point, int timeout_ms,
+               void *arch_info)
 {
-       if (!target_was_examined(target))
-       {
-               LOG_ERROR("Target not examined yet");
-               return ERROR_FAIL;
+       int retval = ERROR_FAIL;
+
+       if (!target->type->wait_algorithm) {
+               LOG_ERROR("Target type '%s' does not support %s",
+                               target_type_name(target), __func__);
+               goto done;
+       }
+       if (!target->running_alg) {
+               LOG_ERROR("Target is not running an algorithm");
+               goto done;
+       }
+
+       retval = target->type->wait_algorithm(target,
+                       num_mem_params, mem_params,
+                       num_reg_params, reg_params,
+                       exit_point, timeout_ms, arch_info);
+       if (retval != ERROR_TARGET_TIMEOUT)
+               target->running_alg = false;
+
+done:
+       return retval;
+}
+
+/**
+ * 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.
+ *
+ * @param target used to run the algorithm
+ */
+
+int target_run_flash_async_algorithm(struct target *target,
+               const uint8_t *buffer, uint32_t count, int block_size,
+               int num_mem_params, struct mem_param *mem_params,
+               int num_reg_params, struct reg_param *reg_params,
+               uint32_t buffer_start, uint32_t buffer_size,
+               uint32_t entry_point, uint32_t exit_point, void *arch_info)
+{
+       int retval;
+       int timeout = 0;
+
+       const uint8_t *buffer_orig = buffer;
+
+       /* Set up working area. First word is write pointer, second word is read pointer,
+        * rest is fifo data area. */
+       uint32_t wp_addr = buffer_start;
+       uint32_t rp_addr = buffer_start + 4;
+       uint32_t fifo_start_addr = buffer_start + 8;
+       uint32_t fifo_end_addr = buffer_start + buffer_size;
+
+       uint32_t wp = fifo_start_addr;
+       uint32_t rp = fifo_start_addr;
+
+       /* validate block_size is 2^n */
+       assert(!block_size || !(block_size & (block_size - 1)));
+
+       retval = target_write_u32(target, wp_addr, wp);
+       if (retval != ERROR_OK)
+               return retval;
+       retval = target_write_u32(target, rp_addr, rp);
+       if (retval != ERROR_OK)
+               return retval;
+
+       /* Start up algorithm on target and let it idle while writing the first chunk */
+       retval = target_start_algorithm(target, num_mem_params, mem_params,
+                       num_reg_params, reg_params,
+                       entry_point,
+                       exit_point,
+                       arch_info);
+
+       if (retval != ERROR_OK) {
+               LOG_ERROR("error starting target flash write algorithm");
+               return retval;
+       }
+
+       while (count > 0) {
+
+               retval = target_read_u32(target, rp_addr, &rp);
+               if (retval != ERROR_OK) {
+                       LOG_ERROR("failed to get read pointer");
+                       break;
+               }
+
+               LOG_DEBUG("offs 0x%zx count 0x%" PRIx32 " wp 0x%" PRIx32 " rp 0x%" PRIx32,
+                       (size_t) (buffer - buffer_orig), count, wp, rp);
+
+               if (rp == 0) {
+                       LOG_ERROR("flash write algorithm aborted by target");
+                       retval = ERROR_FLASH_OPERATION_FAILED;
+                       break;
+               }
+
+               if ((rp & (block_size - 1)) || rp < fifo_start_addr || rp >= fifo_end_addr) {
+                       LOG_ERROR("corrupted fifo read pointer 0x%" PRIx32, rp);
+                       break;
+               }
+
+               /* Count the number of bytes available in the fifo without
+                * crossing the wrap around. Make sure to not fill it completely,
+                * because that would make wp == rp and that's the empty condition. */
+               uint32_t thisrun_bytes;
+               if (rp > wp)
+                       thisrun_bytes = rp - wp - block_size;
+               else if (rp > fifo_start_addr)
+                       thisrun_bytes = fifo_end_addr - wp;
+               else
+                       thisrun_bytes = fifo_end_addr - wp - block_size;
+
+               if (thisrun_bytes == 0) {
+                       /* Throttle polling a bit if transfer is (much) faster than flash
+                        * programming. The exact delay shouldn't matter as long as it's
+                        * less than buffer size / flash speed. This is very unlikely to
+                        * run when using high latency connections such as USB. */
+                       alive_sleep(10);
+
+                       /* to stop an infinite loop on some targets check and increment a timeout
+                        * this issue was observed on a stellaris using the new ICDI interface */
+                       if (timeout++ >= 500) {
+                               LOG_ERROR("timeout waiting for algorithm, a target reset is recommended");
+                               return ERROR_FLASH_OPERATION_FAILED;
+                       }
+                       continue;
+               }
+
+               /* reset our timeout */
+               timeout = 0;
+
+               /* Limit to the amount of data we actually want to write */
+               if (thisrun_bytes > count * block_size)
+                       thisrun_bytes = count * block_size;
+
+               /* Write data to fifo */
+               retval = target_write_buffer(target, wp, thisrun_bytes, buffer);
+               if (retval != ERROR_OK)
+                       break;
+
+               /* Update counters and wrap write pointer */
+               buffer += thisrun_bytes;
+               count -= thisrun_bytes / block_size;
+               wp += thisrun_bytes;
+               if (wp >= fifo_end_addr)
+                       wp = fifo_start_addr;
+
+               /* Store updated write pointer to target */
+               retval = target_write_u32(target, wp_addr, wp);
+               if (retval != ERROR_OK)
+                       break;
+       }
+
+       if (retval != ERROR_OK) {
+               /* abort flash write algorithm on target */
+               target_write_u32(target, wp_addr, 0);
        }
-       return target->type->run_algorithm_imp(target, num_mem_params, mem_params, num_reg_params, reg_param, entry_point, exit_point, timeout_ms, arch_info);
+
+       int retval2 = target_wait_algorithm(target, num_mem_params, mem_params,
+                       num_reg_params, reg_params,
+                       exit_point,
+                       10000,
+                       arch_info);
+
+       if (retval2 != ERROR_OK) {
+               LOG_ERROR("error waiting for target flash write algorithm");
+               retval = retval2;
+       }
+
+       return retval;
 }
 
 int target_read_memory(struct target *target,
                uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
 {
+       if (!target_was_examined(target)) {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_FAIL;
+       }
        return target->type->read_memory(target, address, size, count, buffer);
 }
 
 int target_read_phys_memory(struct target *target,
                uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
 {
+       if (!target_was_examined(target)) {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_FAIL;
+       }
        return target->type->read_phys_memory(target, address, size, count, buffer);
 }
 
 int target_write_memory(struct target *target,
-               uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+               uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer)
 {
+       if (!target_was_examined(target)) {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_FAIL;
+       }
        return target->type->write_memory(target, address, size, count, buffer);
 }
 
 int target_write_phys_memory(struct target *target,
-               uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer)
+               uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer)
 {
+       if (!target_was_examined(target)) {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_FAIL;
+       }
        return target->type->write_phys_memory(target, address, size, count, buffer);
 }
 
-int target_bulk_write_memory(struct target *target,
-               uint32_t address, uint32_t count, uint8_t *buffer)
+int target_add_breakpoint(struct target *target,
+               struct breakpoint *breakpoint)
 {
-       return target->type->bulk_write_memory(target, address, count, buffer);
+       if ((target->state != TARGET_HALTED) && (breakpoint->type != BKPT_HARD)) {
+               LOG_WARNING("target %s is not halted", target_name(target));
+               return ERROR_TARGET_NOT_HALTED;
+       }
+       return target->type->add_breakpoint(target, breakpoint);
 }
 
-int target_add_breakpoint(struct target *target,
+int target_add_context_breakpoint(struct target *target,
                struct breakpoint *breakpoint)
 {
-       return target->type->add_breakpoint(target, breakpoint);
+       if (target->state != TARGET_HALTED) {
+               LOG_WARNING("target %s is not halted", target_name(target));
+               return ERROR_TARGET_NOT_HALTED;
+       }
+       return target->type->add_context_breakpoint(target, breakpoint);
+}
+
+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));
+               return ERROR_TARGET_NOT_HALTED;
+       }
+       return target->type->add_hybrid_breakpoint(target, breakpoint);
 }
+
 int target_remove_breakpoint(struct target *target,
                struct breakpoint *breakpoint)
 {
@@ -614,6 +1069,10 @@ int target_remove_breakpoint(struct target *target,
 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));
+               return ERROR_TARGET_NOT_HALTED;
+       }
        return target->type->add_watchpoint(target, watchpoint);
 }
 int target_remove_watchpoint(struct target *target,
@@ -621,11 +1080,29 @@ int target_remove_watchpoint(struct target *target,
 {
        return target->type->remove_watchpoint(target, watchpoint);
 }
+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);
+               return ERROR_TARGET_NOT_HALTED;
+       }
+
+       if (target->type->hit_watchpoint == NULL) {
+               /* For backward compatible, if hit_watchpoint is not implemented,
+                * return ERROR_FAIL such that gdb_server will not take the nonsense
+                * information. */
+               return ERROR_FAIL;
+       }
+
+       return target->type->hit_watchpoint(target, hit_watchpoint);
+}
 
 int target_get_gdb_reg_list(struct target *target,
-               struct reg **reg_list[], int *reg_list_size)
+               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);
+       return target->type->get_gdb_reg_list(target, reg_list, reg_list_size, reg_class);
 }
 int target_step(struct target *target,
                int current, uint32_t address, int handle_breakpoints)
@@ -633,16 +1110,33 @@ int target_step(struct target *target,
        return target->type->step(target, current, address, handle_breakpoints);
 }
 
+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);
+               return ERROR_TARGET_NOT_HALTED;
+       }
+       return target->type->get_gdb_fileio_info(target, fileio_info);
+}
 
-int target_run_algorithm(struct target *target,
-               int num_mem_params, struct mem_param *mem_params,
-               int num_reg_params, struct reg_param *reg_param,
-               uint32_t entry_point, uint32_t exit_point,
-               int timeout_ms, void *arch_info)
+int target_gdb_fileio_end(struct target *target, int retcode, int fileio_errno, bool ctrl_c)
 {
-       return target->type->run_algorithm(target,
-                       num_mem_params, mem_params, num_reg_params, reg_param,
-                       entry_point, exit_point, timeout_ms, arch_info);
+       if (target->state != TARGET_HALTED) {
+               LOG_WARNING("target %s is not halted", target->cmd_name);
+               return ERROR_TARGET_NOT_HALTED;
+       }
+       return target->type->gdb_fileio_end(target, retcode, fileio_errno, ctrl_c);
+}
+
+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);
+               return ERROR_TARGET_NOT_HALTED;
+       }
+       return target->type->profiling(target, samples, max_num_samples,
+                       num_samples, seconds);
 }
 
 /**
@@ -654,227 +1148,157 @@ static void target_reset_examined(struct target *target)
        target->examined = false;
 }
 
-
-
-static int default_mrc(struct target *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
+static int err_read_phys_memory(struct target *target, uint32_t address,
+               uint32_t size, uint32_t count, uint8_t *buffer)
 {
        LOG_ERROR("Not implemented: %s", __func__);
        return ERROR_FAIL;
 }
 
-static int default_mcr(struct target *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
+static int err_write_phys_memory(struct target *target, uint32_t address,
+               uint32_t size, uint32_t count, const uint8_t *buffer)
 {
        LOG_ERROR("Not implemented: %s", __func__);
        return ERROR_FAIL;
 }
 
-static int arm_cp_check(struct target *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm)
-{
-       /* basic check */
-       if (!target_was_examined(target))
-       {
-               LOG_ERROR("Target not examined yet");
-               return ERROR_FAIL;
-       }
+static int handle_target(void *priv);
 
-       if ((cpnum <0) || (cpnum > 15))
-       {
-               LOG_ERROR("Illegal co-processor %d", cpnum);
-               return ERROR_FAIL;
-       }
+static int target_init_one(struct command_context *cmd_ctx,
+               struct target *target)
+{
+       target_reset_examined(target);
 
-       if (op1 > 7)
-       {
-               LOG_ERROR("Illegal op1");
-               return ERROR_FAIL;
-       }
+       struct target_type *type = target->type;
+       if (type->examine == NULL)
+               type->examine = default_examine;
 
-       if (op2 > 7)
-       {
-               LOG_ERROR("Illegal op2");
-               return ERROR_FAIL;
-       }
+       if (type->check_reset == NULL)
+               type->check_reset = default_check_reset;
 
-       if (CRn > 15)
-       {
-               LOG_ERROR("Illegal CRn");
-               return ERROR_FAIL;
-       }
+       assert(type->init_target != NULL);
 
-       if (CRm > 15)
-       {
-               LOG_ERROR("Illegal CRm");
-               return ERROR_FAIL;
+       int retval = type->init_target(cmd_ctx, target);
+       if (ERROR_OK != retval) {
+               LOG_ERROR("target '%s' init failed", target_name(target));
+               return retval;
        }
 
-       return ERROR_OK;
-}
-
-int target_mrc(struct target *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t *value)
-{
-       int retval;
+       /* Sanity-check MMU support ... stub in what we must, to help
+        * implement it in stages, but warn if we need to do so.
+        */
+       if (type->mmu) {
+               if (type->write_phys_memory == NULL) {
+                       LOG_ERROR("type '%s' is missing write_phys_memory",
+                                       type->name);
+                       type->write_phys_memory = err_write_phys_memory;
+               }
+               if (type->read_phys_memory == NULL) {
+                       LOG_ERROR("type '%s' is missing read_phys_memory",
+                                       type->name);
+                       type->read_phys_memory = err_read_phys_memory;
+               }
+               if (type->virt2phys == NULL) {
+                       LOG_ERROR("type '%s' is missing virt2phys", type->name);
+                       type->virt2phys = identity_virt2phys;
+               }
+       } else {
+               /* Make sure no-MMU targets all behave the same:  make no
+                * distinction between physical and virtual addresses, and
+                * ensure that virt2phys() is always an identity mapping.
+                */
+               if (type->write_phys_memory || type->read_phys_memory || type->virt2phys)
+                       LOG_WARNING("type '%s' has bad MMU hooks", type->name);
 
-       retval = arm_cp_check(target, cpnum, op1, op2, CRn, CRm);
-       if (retval != ERROR_OK)
-               return retval;
+               type->mmu = no_mmu;
+               type->write_phys_memory = type->write_memory;
+               type->read_phys_memory = type->read_memory;
+               type->virt2phys = identity_virt2phys;
+       }
 
-       return target->type->mrc(target, cpnum, op1, op2, CRn, CRm, value);
-}
+       if (target->type->read_buffer == NULL)
+               target->type->read_buffer = target_read_buffer_default;
 
-int target_mcr(struct target *target, int cpnum, uint32_t op1, uint32_t op2, uint32_t CRn, uint32_t CRm, uint32_t value)
-{
-       int retval;
+       if (target->type->write_buffer == NULL)
+               target->type->write_buffer = target_write_buffer_default;
 
-       retval = arm_cp_check(target, cpnum, op1, op2, CRn, CRm);
-       if (retval != ERROR_OK)
-               return retval;
+       if (target->type->get_gdb_fileio_info == NULL)
+               target->type->get_gdb_fileio_info = target_get_gdb_fileio_info_default;
 
-       return target->type->mcr(target, cpnum, op1, op2, CRn, CRm, value);
-}
+       if (target->type->gdb_fileio_end == NULL)
+               target->type->gdb_fileio_end = target_gdb_fileio_end_default;
 
-static int
-err_read_phys_memory(struct target *target, uint32_t address,
-               uint32_t size, uint32_t count, uint8_t *buffer)
-{
-       LOG_ERROR("Not implemented: %s", __func__);
-       return ERROR_FAIL;
-}
+       if (target->type->profiling == NULL)
+               target->type->profiling = target_profiling_default;
 
-static int
-err_write_phys_memory(struct target *target, uint32_t address,
-               uint32_t size, uint32_t count, uint8_t *buffer)
-{
-       LOG_ERROR("Not implemented: %s", __func__);
-       return ERROR_FAIL;
+       return ERROR_OK;
 }
 
-int target_init(struct command_context *cmd_ctx)
+static int target_init(struct command_context *cmd_ctx)
 {
        struct target *target;
        int retval;
 
        for (target = all_targets; target; target = target->next) {
-               struct target_type *type = target->type;
-
-               target_reset_examined(target);
-               if (target->type->examine == NULL)
-               {
-                       target->type->examine = default_examine;
-               }
-
-               if ((retval = target->type->init_target(cmd_ctx, target)) != ERROR_OK)
-               {
-                       LOG_ERROR("target '%s' init failed", target_get_name(target));
+               retval = target_init_one(cmd_ctx, target);
+               if (ERROR_OK != retval)
                        return retval;
-               }
+       }
 
-               /**
-                * @todo MCR/MRC are ARM-specific; don't require them in
-                * all targets, or for ARMs without coprocessors.
-                */
-               if (target->type->mcr == NULL)
-               {
-                       target->type->mcr = default_mcr;
-               } else
-               {
-                       /* FIX! multiple targets will generally register global commands
-                        * multiple times. Only register this one if *one* of the
-                        * targets need the command. Hmm... make it a command on the
-                        * Jim Tcl target object?
-                        */
-                       register_jim(cmd_ctx, "mcr", jim_mcrmrc, "write coprocessor <cpnum> <op1> <op2> <CRn> <CRm> <value>");
-               }
+       if (!all_targets)
+               return ERROR_OK;
 
-               if (target->type->mrc == NULL)
-               {
-                       target->type->mrc = default_mrc;
-               } else
-               {
-                       register_jim(cmd_ctx, "mrc", jim_mcrmrc, "read coprocessor <cpnum> <op1> <op2> <CRn> <CRm>");
-               }
+       retval = target_register_user_commands(cmd_ctx);
+       if (ERROR_OK != retval)
+               return retval;
 
+       retval = target_register_timer_callback(&handle_target,
+                       polling_interval, 1, cmd_ctx->interp);
+       if (ERROR_OK != retval)
+               return retval;
 
-               /**
-                * @todo get rid of those *memory_imp() methods, now that all
-                * callers are using target_*_memory() accessors ... and make
-                * sure the "physical" paths handle the same issues.
-                */
+       return ERROR_OK;
+}
 
-               /* a non-invasive way(in terms of patches) to add some code that
-                * runs before the type->write/read_memory implementation
-                */
-               target->type->write_memory_imp = target->type->write_memory;
-               target->type->write_memory = target_write_memory_imp;
-               target->type->read_memory_imp = target->type->read_memory;
-               target->type->read_memory = target_read_memory_imp;
-               target->type->soft_reset_halt_imp = target->type->soft_reset_halt;
-               target->type->soft_reset_halt = target_soft_reset_halt_imp;
-               target->type->run_algorithm_imp = target->type->run_algorithm;
-               target->type->run_algorithm = target_run_algorithm_imp;
-
-               /* Sanity-check MMU support ... stub in what we must, to help
-                * implement it in stages, but warn if we need to do so.
-                */
-               if (type->mmu) {
-                       if (type->write_phys_memory == NULL) {
-                               LOG_ERROR("type '%s' is missing %s",
-                                               type->name,
-                                               "write_phys_memory");
-                               type->write_phys_memory = err_write_phys_memory;
-                       }
-                       if (type->read_phys_memory == NULL) {
-                               LOG_ERROR("type '%s' is missing %s",
-                                               type->name,
-                                               "read_phys_memory");
-                               type->read_phys_memory = err_read_phys_memory;
-                       }
-                       if (type->virt2phys == NULL) {
-                               LOG_ERROR("type '%s' is missing %s",
-                                               type->name,
-                                               "virt2phys");
-                               type->virt2phys = identity_virt2phys;
-                       }
+COMMAND_HANDLER(handle_target_init_command)
+{
+       int retval;
 
-               /* Make sure no-MMU targets all behave the same:  make no
-                * distinction between physical and virtual addresses, and
-                * ensure that virt2phys() is always an identity mapping.
-                */
-               } else {
-                       if (type->write_phys_memory
-                                       || type->read_phys_memory
-                                       || type->virt2phys)
-                               LOG_WARNING("type '%s' has broken MMU hooks",
-                                               type->name);
-
-                       type->mmu = no_mmu;
-                       type->write_phys_memory = type->write_memory;
-                       type->read_phys_memory = type->read_memory;
-                       type->virt2phys = identity_virt2phys;
-               }
-       }
+       if (CMD_ARGC != 0)
+               return ERROR_COMMAND_SYNTAX_ERROR;
 
-       if (all_targets)
-       {
-               if ((retval = target_register_user_commands(cmd_ctx)) != ERROR_OK)
-                       return retval;
-               if ((retval = target_register_timer_callback(handle_target, 100, 1, NULL)) != ERROR_OK)
-                       return retval;
+       static bool target_initialized;
+       if (target_initialized) {
+               LOG_INFO("'target init' has already been called");
+               return ERROR_OK;
        }
+       target_initialized = true;
 
-       return ERROR_OK;
+       retval = command_run_line(CMD_CTX, "init_targets");
+       if (ERROR_OK != retval)
+               return retval;
+
+       retval = command_run_line(CMD_CTX, "init_target_events");
+       if (ERROR_OK != retval)
+               return retval;
+
+       retval = command_run_line(CMD_CTX, "init_board");
+       if (ERROR_OK != retval)
+               return retval;
+
+       LOG_DEBUG("Initializing targets...");
+       return target_init(CMD_CTX);
 }
 
-int target_register_event_callback(int (*callback)(struct target *target, enum target_event event, void *priv), void *priv)
+int target_register_event_callback(int (*callback)(struct target *target,
+               enum target_event event, void *priv), void *priv)
 {
        struct target_event_callback **callbacks_p = &target_event_callbacks;
 
        if (callback == NULL)
-       {
-               return ERROR_INVALID_ARGUMENTS;
-       }
+               return ERROR_COMMAND_SYNTAX_ERROR;
 
-       if (*callbacks_p)
-       {
+       if (*callbacks_p) {
                while ((*callbacks_p)->next)
                        callbacks_p = &((*callbacks_p)->next);
                callbacks_p = &((*callbacks_p)->next);
@@ -894,12 +1318,9 @@ int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int
        struct timeval now;
 
        if (callback == NULL)
-       {
-               return ERROR_INVALID_ARGUMENTS;
-       }
+               return ERROR_COMMAND_SYNTAX_ERROR;
 
-       if (*callbacks_p)
-       {
+       if (*callbacks_p) {
                while ((*callbacks_p)->next)
                        callbacks_p = &((*callbacks_p)->next);
                callbacks_p = &((*callbacks_p)->next);
@@ -914,8 +1335,7 @@ int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int
        (*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)
-       {
+       if ((*callbacks_p)->when.tv_usec > 1000000) {
                (*callbacks_p)->when.tv_usec = (*callbacks_p)->when.tv_usec - 1000000;
                (*callbacks_p)->when.tv_sec += 1;
        }
@@ -926,26 +1346,22 @@ int target_register_timer_callback(int (*callback)(void *priv), int time_ms, int
        return ERROR_OK;
 }
 
-int target_unregister_event_callback(int (*callback)(struct target *target, enum target_event event, void *priv), void *priv)
+int target_unregister_event_callback(int (*callback)(struct target *target,
+               enum target_event event, void *priv), void *priv)
 {
        struct target_event_callback **p = &target_event_callbacks;
        struct target_event_callback *c = target_event_callbacks;
 
        if (callback == NULL)
-       {
-               return ERROR_INVALID_ARGUMENTS;
-       }
+               return ERROR_COMMAND_SYNTAX_ERROR;
 
-       while (c)
-       {
+       while (c) {
                struct target_event_callback *next = c->next;
-               if ((c->callback == callback) && (c->priv == priv))
-               {
+               if ((c->callback == callback) && (c->priv == priv)) {
                        *p = next;
                        free(c);
                        return ERROR_OK;
-               }
-               else
+               } else
                        p = &(c->next);
                c = next;
        }
@@ -959,20 +1375,15 @@ int target_unregister_timer_callback(int (*callback)(void *priv), void *priv)
        struct target_timer_callback *c = target_timer_callbacks;
 
        if (callback == NULL)
-       {
-               return ERROR_INVALID_ARGUMENTS;
-       }
+               return ERROR_COMMAND_SYNTAX_ERROR;
 
-       while (c)
-       {
+       while (c) {
                struct target_timer_callback *next = c->next;
-               if ((c->callback == callback) && (c->priv == priv))
-               {
+               if ((c->callback == callback) && (c->priv == priv)) {
                        *p = next;
                        free(c);
                        return ERROR_OK;
-               }
-               else
+               } else
                        p = &(c->next);
                c = next;
        }
@@ -985,20 +1396,17 @@ int target_call_event_callbacks(struct target *target, enum target_event event)
        struct target_event_callback *callback = target_event_callbacks;
        struct target_event_callback *next_callback;
 
-       if (event == TARGET_EVENT_HALTED)
-       {
+       if (event == TARGET_EVENT_HALTED) {
                /* execute early halted first */
                target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
        }
 
-       LOG_DEBUG("target event %i (%s)",
-                         event,
-                         Jim_Nvp_value2name_simple(nvp_target_event, event)->name);
+       LOG_DEBUG("target event %i (%s)", event,
+                       Jim_Nvp_value2name_simple(nvp_target_event, event)->name);
 
        target_handle_event(target, event);
 
-       while (callback)
-       {
+       while (callback) {
                next_callback = callback->next;
                callback->callback(target, event, callback->priv);
                callback = next_callback;
@@ -1014,8 +1422,7 @@ static int target_timer_callback_periodic_restart(
        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)
-       {
+       if (cb->when.tv_usec > 1000000) {
                cb->when.tv_usec = cb->when.tv_usec - 1000000;
                cb->when.tv_sec += 1;
        }
@@ -1041,9 +1448,8 @@ static int target_call_timer_callbacks_check_time(int checktime)
        gettimeofday(&now, NULL);
 
        struct target_timer_callback *callback = target_timer_callbacks;
-       while (callback)
-       {
-               // cleaning up may unregister and free this callback
+       while (callback) {
+               /* cleaning up may unregister and free this callback */
                struct target_timer_callback *next_callback = callback->next;
 
                bool call_it = callback->callback &&
@@ -1052,8 +1458,7 @@ static int target_call_timer_callbacks_check_time(int checktime)
                         (now.tv_sec == callback->when.tv_sec &&
                          now.tv_usec >= callback->when.tv_usec));
 
-               if (call_it)
-               {
+               if (call_it) {
                        int retval = target_call_timer_callback(callback, &now);
                        if (retval != ERROR_OK)
                                return retval;
@@ -1076,28 +1481,99 @@ int target_call_timer_callbacks_now(void)
        return target_call_timer_callbacks_check_time(0);
 }
 
-int target_alloc_working_area(struct target *target, uint32_t size, struct working_area **area)
+/* Prints the working area layout for debug purposes */
+static void print_wa_layout(struct target *target)
+{
+       struct working_area *c = target->working_areas;
+
+       while (c) {
+               LOG_DEBUG("%c%c 0x%08"PRIx32"-0x%08"PRIx32" (%"PRIu32" bytes)",
+                       c->backup ? 'b' : ' ', c->free ? ' ' : '*',
+                       c->address, c->address + c->size - 1, c->size);
+               c = c->next;
+       }
+}
+
+/* Reduce area to size bytes, create a new free area from the remaining bytes, if any. */
+static void target_split_working_area(struct working_area *area, uint32_t size)
+{
+       assert(area->free); /* Shouldn't split an allocated area */
+       assert(size <= area->size); /* Caller should guarantee this */
+
+       /* Split only if not already the right size */
+       if (size < area->size) {
+               struct working_area *new_wa = malloc(sizeof(*new_wa));
+
+               if (new_wa == NULL)
+                       return;
+
+               new_wa->next = area->next;
+               new_wa->size = area->size - size;
+               new_wa->address = area->address + size;
+               new_wa->backup = NULL;
+               new_wa->user = NULL;
+               new_wa->free = true;
+
+               area->next = new_wa;
+               area->size = size;
+
+               /* If backup memory was allocated to this area, it has the wrong size
+                * now so free it and it will be reallocated if/when needed */
+               if (area->backup) {
+                       free(area->backup);
+                       area->backup = NULL;
+               }
+       }
+}
+
+/* Merge all adjacent free areas into one */
+static void target_merge_working_areas(struct target *target)
 {
        struct working_area *c = target->working_areas;
-       struct working_area *new_wa = NULL;
 
+       while (c && c->next) {
+               assert(c->next->address == c->address + c->size); /* This is an invariant */
+
+               /* Find two adjacent free areas */
+               if (c->free && c->next->free) {
+                       /* Merge the last into the first */
+                       c->size += c->next->size;
+
+                       /* Remove the last */
+                       struct working_area *to_be_freed = c->next;
+                       c->next = c->next->next;
+                       if (to_be_freed->backup)
+                               free(to_be_freed->backup);
+                       free(to_be_freed);
+
+                       /* If backup memory was allocated to the remaining area, it's has
+                        * the wrong size now */
+                       if (c->backup) {
+                               free(c->backup);
+                               c->backup = NULL;
+                       }
+               } else {
+                       c = c->next;
+               }
+       }
+}
+
+int target_alloc_working_area_try(struct target *target, uint32_t size, struct working_area **area)
+{
        /* Reevaluate working area address based on MMU state*/
-       if (target->working_areas == NULL)
-       {
+       if (target->working_areas == NULL) {
                int retval;
                int enabled;
 
                retval = target->type->mmu(target, &enabled);
                if (retval != ERROR_OK)
-               {
                        return retval;
-               }
 
                if (!enabled) {
                        if (target->working_area_phys_spec) {
                                LOG_DEBUG("MMU disabled, using physical "
-                                       "address for working memory 0x%08x",
-                                       (unsigned)target->working_area_phys);
+                                       "address for working memory 0x%08"PRIx32,
+                                       target->working_area_phys);
                                target->working_area = target->working_area_phys;
                        } else {
                                LOG_ERROR("No working memory available. "
@@ -1107,8 +1583,8 @@ int target_alloc_working_area(struct target *target, uint32_t size, struct worki
                } else {
                        if (target->working_area_virt_spec) {
                                LOG_DEBUG("MMU enabled, using virtual "
-                                       "address for working memory 0x%08x",
-                                       (unsigned)target->working_area_virt);
+                                       "address for working memory 0x%08"PRIx32,
+                                       target->working_area_virt);
                                target->working_area = target->working_area_virt;
                        } else {
                                LOG_ERROR("No working memory available. "
@@ -1116,105 +1592,123 @@ int target_alloc_working_area(struct target *target, uint32_t size, struct worki
                                return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
                        }
                }
+
+               /* Set up initial working area on first call */
+               struct working_area *new_wa = malloc(sizeof(*new_wa));
+               if (new_wa) {
+                       new_wa->next = NULL;
+                       new_wa->size = target->working_area_size & ~3UL; /* 4-byte align */
+                       new_wa->address = target->working_area;
+                       new_wa->backup = NULL;
+                       new_wa->user = NULL;
+                       new_wa->free = true;
+               }
+
+               target->working_areas = new_wa;
        }
 
        /* only allocate multiples of 4 byte */
        if (size % 4)
-       {
-               LOG_ERROR("BUG: code tried to allocate unaligned number of bytes (0x%08x), padding", ((unsigned)(size)));
-               size = (size + 3) & (~3);
-       }
+               size = (size + 3) & (~3UL);
 
-       /* see if there's already a matching working area */
-       while (c)
-       {
-               if ((c->free) && (c->size == size))
-               {
-                       new_wa = c;
+       struct working_area *c = target->working_areas;
+
+       /* Find the first large enough working area */
+       while (c) {
+               if (c->free && c->size >= size)
                        break;
-               }
                c = c->next;
        }
 
-       /* if not, allocate a new one */
-       if (!new_wa)
-       {
-               struct working_area **p = &target->working_areas;
-               uint32_t first_free = target->working_area;
-               uint32_t free_size = target->working_area_size;
-
-               c = target->working_areas;
-               while (c)
-               {
-                       first_free += c->size;
-                       free_size -= c->size;
-                       p = &c->next;
-                       c = c->next;
-               }
-
-               if (free_size < size)
-               {
-                       LOG_WARNING("not enough working area available(requested %u, free %u)",
-                                   (unsigned)(size), (unsigned)(free_size));
-                       return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
-               }
+       if (c == NULL)
+               return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 
-               LOG_DEBUG("allocated new working area at address 0x%08x", (unsigned)first_free);
+       /* Split the working area into the requested size */
+       target_split_working_area(c, size);
 
-               new_wa = malloc(sizeof(struct working_area));
-               new_wa->next = NULL;
-               new_wa->size = size;
-               new_wa->address = first_free;
+       LOG_DEBUG("allocated new working area of %"PRIu32" bytes at address 0x%08"PRIx32, size, c->address);
 
-               if (target->backup_working_area)
-               {
-                       int retval;
-                       new_wa->backup = malloc(new_wa->size);
-                       if ((retval = target_read_memory(target, new_wa->address, 4, new_wa->size / 4, new_wa->backup)) != ERROR_OK)
-                       {
-                               free(new_wa->backup);
-                               free(new_wa);
-                               return retval;
-                       }
-               }
-               else
-               {
-                       new_wa->backup = NULL;
+       if (target->backup_working_area) {
+               if (c->backup == NULL) {
+                       c->backup = malloc(c->size);
+                       if (c->backup == NULL)
+                               return ERROR_FAIL;
                }
 
-               /* put new entry in list */
-               *p = new_wa;
+               int retval = target_read_memory(target, c->address, 4, c->size / 4, c->backup);
+               if (retval != ERROR_OK)
+                       return retval;
        }
 
        /* mark as used, and return the new (reused) area */
-       new_wa->free = 0;
-       *area = new_wa;
+       c->free = false;
+       *area = c;
 
        /* user pointer */
-       new_wa->user = area;
+       c->user = area;
+
+       print_wa_layout(target);
 
        return ERROR_OK;
 }
 
-int target_free_working_area_restore(struct target *target, struct working_area *area, int restore)
+int target_alloc_working_area(struct target *target, uint32_t size, struct working_area **area)
+{
+       int retval;
+
+       retval = target_alloc_working_area_try(target, size, area);
+       if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE)
+               LOG_WARNING("not enough working area available(requested %"PRIu32")", size);
+       return retval;
+
+}
+
+static int target_restore_working_area(struct target *target, struct working_area *area)
+{
+       int retval = ERROR_OK;
+
+       if (target->backup_working_area && area->backup != NULL) {
+               retval = target_write_memory(target, area->address, 4, area->size / 4, area->backup);
+               if (retval != ERROR_OK)
+                       LOG_ERROR("failed to restore %"PRIu32" bytes of working area at address 0x%08"PRIx32,
+                                       area->size, area->address);
+       }
+
+       return retval;
+}
+
+/* Restore the area's backup memory, if any, and return the area to the allocation pool */
+static int target_free_working_area_restore(struct target *target, struct working_area *area, int restore)
 {
+       int retval = ERROR_OK;
+
        if (area->free)
-               return ERROR_OK;
+               return retval;
 
-       if (restore && target->backup_working_area)
-       {
-               int retval;
-               if ((retval = target_write_memory(target, area->address, 4, area->size / 4, area->backup)) != ERROR_OK)
+       if (restore) {
+               retval = target_restore_working_area(target, area);
+               /* REVISIT: Perhaps the area should be freed even if restoring fails. */
+               if (retval != ERROR_OK)
                        return retval;
        }
 
-       area->free = 1;
+       area->free = true;
+
+       LOG_DEBUG("freed %"PRIu32" bytes of working area at address 0x%08"PRIx32,
+                       area->size, area->address);
 
        /* mark user pointer invalid */
+       /* TODO: Is this really safe? It points to some previous caller's memory.
+        * How could we know that the area pointer is still in that place and not
+        * some other vital data? What's the purpose of this, anyway? */
        *area->user = NULL;
        area->user = NULL;
 
-       return ERROR_OK;
+       target_merge_working_areas(target);
+
+       print_wa_layout(target);
+
+       return retval;
 }
 
 int target_free_working_area(struct target *target, struct working_area *area)
@@ -1225,24 +1719,28 @@ int target_free_working_area(struct target *target, struct working_area *area)
 /* free resources and restore memory, if restoring memory fails,
  * free up resources anyway
  */
-void target_free_all_working_areas_restore(struct target *target, int restore)
+static void target_free_all_working_areas_restore(struct target *target, int restore)
 {
        struct working_area *c = target->working_areas;
 
-       while (c)
-       {
-               struct working_area *next = c->next;
-               target_free_working_area_restore(target, c, restore);
-
-               if (c->backup)
-                       free(c->backup);
+       LOG_DEBUG("freeing all working areas");
 
-               free(c);
-
-               c = next;
+       /* Loop through all areas, restoring the allocated ones and marking them as free */
+       while (c) {
+               if (!c->free) {
+                       if (restore)
+                               target_restore_working_area(target, c);
+                       c->free = true;
+                       *c->user = NULL; /* Same as above */
+                       c->user = NULL;
+               }
+               c = c->next;
        }
 
-       target->working_areas = NULL;
+       /* Run a merge pass to combine all areas into one */
+       target_merge_working_areas(target);
+
+       print_wa_layout(target);
 }
 
 void target_free_all_working_areas(struct target *target)
@@ -1250,46 +1748,125 @@ void target_free_all_working_areas(struct target *target)
        target_free_all_working_areas_restore(target, 1);
 }
 
-int target_arch_state(struct target *target)
+/* Find the largest number of bytes that can be allocated */
+uint32_t target_get_working_area_avail(struct target *target)
 {
-       int retval;
-       if (target == NULL)
-       {
-               LOG_USER("No target has been configured");
-               return ERROR_OK;
-       }
+       struct working_area *c = target->working_areas;
+       uint32_t max_size = 0;
 
-       LOG_USER("target state: %s", target_state_name( target ));
+       if (c == NULL)
+               return target->working_area_size;
 
-       if (target->state != TARGET_HALTED)
-               return ERROR_OK;
+       while (c) {
+               if (c->free && max_size < c->size)
+                       max_size = c->size;
+
+               c = c->next;
+       }
+
+       return max_size;
+}
+
+int target_arch_state(struct target *target)
+{
+       int retval;
+       if (target == NULL) {
+               LOG_USER("No target has been configured");
+               return ERROR_OK;
+       }
+
+       LOG_USER("target state: %s", target_state_name(target));
+
+       if (target->state != TARGET_HALTED)
+               return ERROR_OK;
 
        retval = target->type->arch_state(target);
        return retval;
 }
 
+static int target_get_gdb_fileio_info_default(struct target *target,
+               struct gdb_fileio_info *fileio_info)
+{
+       /* If target does not support semi-hosting function, target
+          has no need to provide .get_gdb_fileio_info callback.
+          It just return ERROR_FAIL and gdb_server will return "Txx"
+          as target halted every time.  */
+       return ERROR_FAIL;
+}
+
+static int target_gdb_fileio_end_default(struct target *target,
+               int retcode, int fileio_errno, bool ctrl_c)
+{
+       return ERROR_OK;
+}
+
+static int target_profiling_default(struct target *target, uint32_t *samples,
+               uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
+{
+       struct timeval timeout, now;
+
+       gettimeofday(&timeout, NULL);
+       timeval_add_time(&timeout, seconds, 0);
+
+       LOG_INFO("Starting profiling. Halting and resuming the"
+                       " target as often as we can...");
+
+       uint32_t sample_count = 0;
+       /* hopefully it is safe to cache! We want to stop/restart as quickly as possible. */
+       struct reg *reg = register_get_by_name(target->reg_cache, "pc", 1);
+
+       int retval = ERROR_OK;
+       for (;;) {
+               target_poll(target);
+               if (target->state == TARGET_HALTED) {
+                       uint32_t t = *((uint32_t *)reg->value);
+                       samples[sample_count++] = t;
+                       /* current pc, addr = 0, do not handle breakpoints, not debugging */
+                       retval = target_resume(target, 1, 0, 0, 0);
+                       target_poll(target);
+                       alive_sleep(10); /* sleep 10ms, i.e. <100 samples/second. */
+               } else if (target->state == TARGET_RUNNING) {
+                       /* We want to quickly sample the PC. */
+                       retval = target_halt(target);
+               } else {
+                       LOG_INFO("Target not halted or running");
+                       retval = ERROR_OK;
+                       break;
+               }
+
+               if (retval != ERROR_OK)
+                       break;
+
+               gettimeofday(&now, NULL);
+               if ((sample_count >= max_num_samples) ||
+                       ((now.tv_sec >= timeout.tv_sec) && (now.tv_usec >= timeout.tv_usec))) {
+                       LOG_INFO("Profiling completed. %" PRIu32 " samples.", sample_count);
+                       break;
+               }
+       }
+
+       *num_samples = sample_count;
+       return retval;
+}
+
 /* Single aligned words are guaranteed to use 16 or 32 bit access
  * mode respectively, otherwise data is handled as quickly as
  * possible
  */
-int target_write_buffer(struct target *target, uint32_t address, uint32_t size, uint8_t *buffer)
+int target_write_buffer(struct target *target, uint32_t address, uint32_t size, const uint8_t *buffer)
 {
-       int retval;
        LOG_DEBUG("writing buffer of %i byte at 0x%8.8x",
-                 (int)size, (unsigned)address);
+                       (int)size, (unsigned)address);
 
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
 
-       if (size == 0) {
+       if (size == 0)
                return ERROR_OK;
-       }
 
-       if ((address + size - 1) < address)
-       {
+       if ((address + size - 1) < address) {
                /* GDB can request this when e.g. PC is 0xfffffffc*/
                LOG_ERROR("address + size wrapped(0x%08x, 0x%08x)",
                                  (unsigned)address,
@@ -1297,54 +1874,37 @@ int target_write_buffer(struct target *target, uint32_t address, uint32_t size,
                return ERROR_FAIL;
        }
 
-       if (((address % 2) == 0) && (size == 2))
-       {
-               return target_write_memory(target, address, 2, 1, buffer);
-       }
-
-       /* handle unaligned head bytes */
-       if (address % 4)
-       {
-               uint32_t unaligned = 4 - (address % 4);
-
-               if (unaligned > size)
-                       unaligned = size;
-
-               if ((retval = target_write_memory(target, address, 1, unaligned, buffer)) != ERROR_OK)
-                       return retval;
-
-               buffer += unaligned;
-               address += unaligned;
-               size -= unaligned;
-       }
+       return target->type->write_buffer(target, address, size, buffer);
+}
 
-       /* handle aligned words */
-       if (size >= 4)
-       {
-               int aligned = size - (size % 4);
+static int target_write_buffer_default(struct target *target, uint32_t address, uint32_t count, const uint8_t *buffer)
+{
+       uint32_t size;
 
-               /* use bulk writes above a certain limit. This may have to be changed */
-               if (aligned > 128)
-               {
-                       if ((retval = target->type->bulk_write_memory(target, address, aligned / 4, buffer)) != ERROR_OK)
-                               return retval;
-               }
-               else
-               {
-                       if ((retval = target_write_memory(target, address, 4, aligned / 4, buffer)) != ERROR_OK)
+       /* Align up to maximum 4 bytes. The loop condition makes sure the next pass
+        * will have something to do with the size we leave to it. */
+       for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) {
+               if (address & size) {
+                       int retval = target_write_memory(target, address, size, 1, buffer);
+                       if (retval != ERROR_OK)
                                return retval;
+                       address += size;
+                       count -= size;
+                       buffer += size;
                }
-
-               buffer += aligned;
-               address += aligned;
-               size -= aligned;
        }
 
-       /* handle tail writes of less than 4 bytes */
-       if (size > 0)
-       {
-               if ((retval = target_write_memory(target, address, 1, size, buffer)) != ERROR_OK)
-                       return retval;
+       /* Write the data with as large access size as possible. */
+       for (; size > 0; size /= 2) {
+               uint32_t aligned = count - count % size;
+               if (aligned > 0) {
+                       int retval = target_write_memory(target, address, size, aligned / size, buffer);
+                       if (retval != ERROR_OK)
+                               return retval;
+                       address += aligned;
+                       count -= aligned;
+                       buffer += aligned;
+               }
        }
 
        return ERROR_OK;
@@ -1356,22 +1916,18 @@ int target_write_buffer(struct target *target, uint32_t address, uint32_t size,
  */
 int target_read_buffer(struct target *target, uint32_t address, uint32_t size, uint8_t *buffer)
 {
-       int retval;
        LOG_DEBUG("reading buffer of %i byte at 0x%8.8x",
                          (int)size, (unsigned)address);
 
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
 
-       if (size == 0) {
+       if (size == 0)
                return ERROR_OK;
-       }
 
-       if ((address + size - 1) < address)
-       {
+       if ((address + size - 1) < address) {
                /* GDB can request this when e.g. PC is 0xfffffffc*/
                LOG_ERROR("address + size wrapped(0x%08" PRIx32 ", 0x%08" PRIx32 ")",
                                  address,
@@ -1379,57 +1935,37 @@ int target_read_buffer(struct target *target, uint32_t address, uint32_t size, u
                return ERROR_FAIL;
        }
 
-       if (((address % 2) == 0) && (size == 2))
-       {
-               return target_read_memory(target, address, 2, 1, buffer);
-       }
-
-       /* handle unaligned head bytes */
-       if (address % 4)
-       {
-               uint32_t unaligned = 4 - (address % 4);
-
-               if (unaligned > size)
-                       unaligned = size;
-
-               if ((retval = target_read_memory(target, address, 1, unaligned, buffer)) != ERROR_OK)
-                       return retval;
-
-               buffer += unaligned;
-               address += unaligned;
-               size -= unaligned;
-       }
-
-       /* handle aligned words */
-       if (size >= 4)
-       {
-               int aligned = size - (size % 4);
+       return target->type->read_buffer(target, address, size, buffer);
+}
 
-               if ((retval = target_read_memory(target, address, 4, aligned / 4, buffer)) != ERROR_OK)
-                       return retval;
+static int target_read_buffer_default(struct target *target, uint32_t address, uint32_t count, uint8_t *buffer)
+{
+       uint32_t size;
 
-               buffer += aligned;
-               address += aligned;
-               size -= aligned;
+       /* Align up to maximum 4 bytes. The loop condition makes sure the next pass
+        * will have something to do with the size we leave to it. */
+       for (size = 1; size < 4 && count >= size * 2 + (address & size); size *= 2) {
+               if (address & size) {
+                       int retval = target_read_memory(target, address, size, 1, buffer);
+                       if (retval != ERROR_OK)
+                               return retval;
+                       address += size;
+                       count -= size;
+                       buffer += size;
+               }
        }
 
-       /*prevent byte access when possible (avoid AHB access limitations in some cases)*/
-       if(size >=2)
-       {
-               int aligned = size - (size%2);
-               retval = target_read_memory(target, address, 2, aligned / 2, buffer);
-               if (retval != ERROR_OK)
-                       return retval;
-
-               buffer += aligned;
-               address += aligned;
-               size -= aligned;
-       }
-       /* handle tail writes of less than 4 bytes */
-       if (size > 0)
-       {
-               if ((retval = target_read_memory(target, address, 1, size, buffer)) != ERROR_OK)
-                       return retval;
+       /* Read the data with as large access size as possible. */
+       for (; size > 0; size /= 2) {
+               uint32_t aligned = count - count % size;
+               if (aligned > 0) {
+                       int retval = target_read_memory(target, address, size, aligned / size, buffer);
+                       if (retval != ERROR_OK)
+                               return retval;
+                       address += aligned;
+                       count -= aligned;
+                       buffer += aligned;
+               }
        }
 
        return ERROR_OK;
@@ -1441,31 +1977,26 @@ int target_checksum_memory(struct target *target, uint32_t address, uint32_t siz
        int retval;
        uint32_t i;
        uint32_t checksum = 0;
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
 
-       if ((retval = target->type->checksum_memory(target, address,
-               size, &checksum)) != ERROR_OK)
-       {
+       retval = target->type->checksum_memory(target, address, size, &checksum);
+       if (retval != ERROR_OK) {
                buffer = malloc(size);
-               if (buffer == NULL)
-               {
+               if (buffer == NULL) {
                        LOG_ERROR("error allocating buffer for section (%d bytes)", (int)size);
-                       return ERROR_INVALID_ARGUMENTS;
+                       return ERROR_COMMAND_SYNTAX_ERROR;
                }
                retval = target_read_buffer(target, address, size, buffer);
-               if (retval != ERROR_OK)
-               {
+               if (retval != ERROR_OK) {
                        free(buffer);
                        return retval;
                }
 
-               /* convert to target endianess */
-               for (i = 0; i < (size/sizeof(uint32_t)); i++)
-               {
+               /* convert to target endianness */
+               for (i = 0; i < (size/sizeof(uint32_t)); i++) {
                        uint32_t target_data;
                        target_data = target_buffer_get_u32(target, &buffer[i*sizeof(uint32_t)]);
                        target_buffer_set_u32(target, &buffer[i*sizeof(uint32_t)], target_data);
@@ -1483,8 +2014,7 @@ int target_checksum_memory(struct target *target, uint32_t address, uint32_t siz
 int target_blank_check_memory(struct target *target, uint32_t address, uint32_t size, uint32_t* blank)
 {
        int retval;
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
@@ -1497,26 +2027,46 @@ int target_blank_check_memory(struct target *target, uint32_t address, uint32_t
        return retval;
 }
 
+int target_read_u64(struct target *target, uint64_t address, uint64_t *value)
+{
+       uint8_t value_buf[8];
+       if (!target_was_examined(target)) {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_FAIL;
+       }
+
+       int retval = target_read_memory(target, address, 8, 1, value_buf);
+
+       if (retval == ERROR_OK) {
+               *value = target_buffer_get_u64(target, value_buf);
+               LOG_DEBUG("address: 0x%" PRIx64 ", value: 0x%16.16" PRIx64 "",
+                                 address,
+                                 *value);
+       } else {
+               *value = 0x0;
+               LOG_DEBUG("address: 0x%" PRIx64 " failed",
+                                 address);
+       }
+
+       return retval;
+}
+
 int target_read_u32(struct target *target, uint32_t address, uint32_t *value)
 {
        uint8_t value_buf[4];
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
 
        int retval = target_read_memory(target, address, 4, 1, value_buf);
 
-       if (retval == ERROR_OK)
-       {
+       if (retval == ERROR_OK) {
                *value = target_buffer_get_u32(target, value_buf);
                LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%8.8" PRIx32 "",
                                  address,
                                  *value);
-       }
-       else
-       {
+       } else {
                *value = 0x0;
                LOG_DEBUG("address: 0x%8.8" PRIx32 " failed",
                                  address);
@@ -1528,23 +2078,19 @@ int target_read_u32(struct target *target, uint32_t address, uint32_t *value)
 int target_read_u16(struct target *target, uint32_t address, uint16_t *value)
 {
        uint8_t value_buf[2];
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
 
        int retval = target_read_memory(target, address, 2, 1, value_buf);
 
-       if (retval == ERROR_OK)
-       {
+       if (retval == ERROR_OK) {
                *value = target_buffer_get_u16(target, value_buf);
                LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%4.4x",
                                  address,
                                  *value);
-       }
-       else
-       {
+       } else {
                *value = 0x0;
                LOG_DEBUG("address: 0x%8.8" PRIx32 " failed",
                                  address);
@@ -1555,21 +2101,18 @@ int target_read_u16(struct target *target, uint32_t address, uint16_t *value)
 
 int target_read_u8(struct target *target, uint32_t address, uint8_t *value)
 {
-       int retval = target_read_memory(target, address, 1, 1, value);
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
 
-       if (retval == ERROR_OK)
-       {
+       int retval = target_read_memory(target, address, 1, 1, value);
+
+       if (retval == ERROR_OK) {
                LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%2.2x",
                                  address,
                                  *value);
-       }
-       else
-       {
+       } else {
                *value = 0x0;
                LOG_DEBUG("address: 0x%8.8" PRIx32 " failed",
                                  address);
@@ -1578,12 +2121,32 @@ int target_read_u8(struct target *target, uint32_t address, uint8_t *value)
        return retval;
 }
 
+int target_write_u64(struct target *target, uint64_t address, uint64_t value)
+{
+       int retval;
+       uint8_t value_buf[8];
+       if (!target_was_examined(target)) {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_FAIL;
+       }
+
+       LOG_DEBUG("address: 0x%" PRIx64 ", value: 0x%16.16" PRIx64 "",
+                         address,
+                         value);
+
+       target_buffer_set_u64(target, value_buf, value);
+       retval = target_write_memory(target, address, 8, 1, value_buf);
+       if (retval != ERROR_OK)
+               LOG_DEBUG("failed: %i", retval);
+
+       return retval;
+}
+
 int target_write_u32(struct target *target, uint32_t address, uint32_t value)
 {
        int retval;
        uint8_t value_buf[4];
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
@@ -1593,10 +2156,9 @@ int target_write_u32(struct target *target, uint32_t address, uint32_t value)
                          value);
 
        target_buffer_set_u32(target, value_buf, value);
-       if ((retval = target_write_memory(target, address, 4, 1, value_buf)) != ERROR_OK)
-       {
+       retval = target_write_memory(target, address, 4, 1, value_buf);
+       if (retval != ERROR_OK)
                LOG_DEBUG("failed: %i", retval);
-       }
 
        return retval;
 }
@@ -1605,8 +2167,7 @@ int target_write_u16(struct target *target, uint32_t address, uint16_t value)
 {
        int retval;
        uint8_t value_buf[2];
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
@@ -1616,10 +2177,9 @@ int target_write_u16(struct target *target, uint32_t address, uint16_t value)
                          value);
 
        target_buffer_set_u16(target, value_buf, value);
-       if ((retval = target_write_memory(target, address, 2, 1, value_buf)) != ERROR_OK)
-       {
+       retval = target_write_memory(target, address, 2, 1, value_buf);
+       if (retval != ERROR_OK)
                LOG_DEBUG("failed: %i", retval);
-       }
 
        return retval;
 }
@@ -1627,8 +2187,7 @@ int target_write_u16(struct target *target, uint32_t address, uint16_t value)
 int target_write_u8(struct target *target, uint32_t address, uint8_t value)
 {
        int retval;
-       if (!target_was_examined(target))
-       {
+       if (!target_was_examined(target)) {
                LOG_ERROR("Target not examined yet");
                return ERROR_FAIL;
        }
@@ -1636,67 +2195,73 @@ int target_write_u8(struct target *target, uint32_t address, uint8_t value)
        LOG_DEBUG("address: 0x%8.8" PRIx32 ", value: 0x%2.2x",
                          address, value);
 
-       if ((retval = target_write_memory(target, address, 1, 1, &value)) != ERROR_OK)
-       {
+       retval = target_write_memory(target, address, 1, 1, &value);
+       if (retval != ERROR_OK)
                LOG_DEBUG("failed: %i", retval);
-       }
 
        return retval;
 }
 
-COMMAND_HANDLER(handle_targets_command)
+static int find_target(struct command_context *cmd_ctx, const char *name)
 {
-       struct target *target = all_targets;
+       struct target *target = get_target(name);
+       if (target == NULL) {
+               LOG_ERROR("Target: %s is unknown, try one of:\n", name);
+               return ERROR_FAIL;
+       }
+       if (!target->tap->enabled) {
+               LOG_USER("Target: TAP %s is disabled, "
+                        "can't be the current target\n",
+                        target->tap->dotted_name);
+               return ERROR_FAIL;
+       }
 
-       if (CMD_ARGC == 1)
-       {
-               target = get_target(args[0]);
-               if (target == NULL) {
-                       command_print(cmd_ctx,"Target: %s is unknown, try one of:\n", args[0]);
-                       goto DumpTargets;
-               }
-               if (!target->tap->enabled) {
-                       command_print(cmd_ctx,"Target: TAP %s is disabled, "
-                                       "can't be the current target\n",
-                                       target->tap->dotted_name);
-                       return ERROR_FAIL;
-               }
+       cmd_ctx->current_target = target->target_number;
+       return ERROR_OK;
+}
 
-               cmd_ctx->current_target = target->target_number;
-               return ERROR_OK;
+
+COMMAND_HANDLER(handle_targets_command)
+{
+       int retval = ERROR_OK;
+       if (CMD_ARGC == 1) {
+               retval = find_target(CMD_CTX, CMD_ARGV[0]);
+               if (retval == ERROR_OK) {
+                       /* we're done! */
+                       return retval;
+               }
        }
-DumpTargets:
 
-       target = all_targets;
-       command_print(cmd_ctx, "    TargetName         Type       Endian TapName            State       ");
-       command_print(cmd_ctx, "--  ------------------ ---------- ------ ------------------ ------------");
-       while (target)
-       {
+       struct target *target = all_targets;
+       command_print(CMD_CTX, "    TargetName         Type       Endian TapName            State       ");
+       command_print(CMD_CTX, "--  ------------------ ---------- ------ ------------------ ------------");
+       while (target) {
                const char *state;
                char marker = ' ';
 
                if (target->tap->enabled)
-                       state = target_state_name( target );
+                       state = target_state_name(target);
                else
                        state = "tap-disabled";
 
-               if (cmd_ctx->current_target == target->target_number)
+               if (CMD_CTX->current_target == target->target_number)
                        marker = '*';
 
                /* keep columns lined up to match the headers above */
-               command_print(cmd_ctx, "%2d%c %-18s %-10s %-6s %-18s %s",
-                                         target->target_number,
-                                         marker,
-                                         target->cmd_name,
-                                         target_get_name(target),
-                                         Jim_Nvp_value2name_simple(nvp_target_endian,
-                                                               target->endianness)->name,
-                                         target->tap->dotted_name,
-                                         state);
+               command_print(CMD_CTX,
+                               "%2d%c %-18s %-10s %-6s %-18s %s",
+                               target->target_number,
+                               marker,
+                               target_name(target),
+                               target_type_name(target),
+                               Jim_Nvp_value2name_simple(nvp_target_endian,
+                                       target->endianness)->name,
+                               target->tap->dotted_name,
+                               state);
                target = target->next;
        }
 
-       return ERROR_OK;
+       return retval;
 }
 
 /* every 300ms we check for reset & powerdropout and issue a "reset halt" if so. */
@@ -1711,53 +2276,47 @@ static int runSrstDeasserted;
 
 static int sense_handler(void)
 {
-       static int prevSrstAsserted = 0;
-       static int prevPowerdropout = 0;
+       static int prevSrstAsserted;
+       static int prevPowerdropout;
 
-       int retval;
-       if ((retval = jtag_power_dropout(&powerDropout)) != ERROR_OK)
+       int retval = jtag_power_dropout(&powerDropout);
+       if (retval != ERROR_OK)
                return retval;
 
        int powerRestored;
        powerRestored = prevPowerdropout && !powerDropout;
        if (powerRestored)
-       {
                runPowerRestore = 1;
-       }
 
        long long current = timeval_ms();
-       static long long lastPower = 0;
+       static long long lastPower;
        int waitMore = lastPower + 2000 > current;
-       if (powerDropout && !waitMore)
-       {
+       if (powerDropout && !waitMore) {
                runPowerDropout = 1;
                lastPower = current;
        }
 
-       if ((retval = jtag_srst_asserted(&srstAsserted)) != ERROR_OK)
+       retval = jtag_srst_asserted(&srstAsserted);
+       if (retval != ERROR_OK)
                return retval;
 
        int srstDeasserted;
        srstDeasserted = prevSrstAsserted && !srstAsserted;
 
-       static long long lastSrst = 0;
+       static long long lastSrst;
        waitMore = lastSrst + 2000 > current;
-       if (srstDeasserted && !waitMore)
-       {
+       if (srstDeasserted && !waitMore) {
                runSrstDeasserted = 1;
                lastSrst = current;
        }
 
        if (!prevSrstAsserted && srstAsserted)
-       {
                runSrstAsserted = 1;
-       }
 
        prevSrstAsserted = srstAsserted;
        prevPowerdropout = powerDropout;
 
-       if (srstDeasserted || powerRestored)
-       {
+       if (srstDeasserted || powerRestored) {
                /* Other than logging the event we can't do anything here.
                 * Issuing a reset is a particularly bad idea as we might
                 * be inside a reset already.
@@ -1767,24 +2326,20 @@ static int sense_handler(void)
        return ERROR_OK;
 }
 
-static void target_call_event_callbacks_all(enum target_event e) {
-       struct target *target;
-       target = all_targets;
-       while (target) {
-               target_call_event_callbacks(target, e);
-               target = target->next;
-       }
-}
-
 /* process target state changes */
-int handle_target(void *priv)
+static int handle_target(void *priv)
 {
+       Jim_Interp *interp = (Jim_Interp *)priv;
        int retval = ERROR_OK;
 
+       if (!is_jtag_poll_safe()) {
+               /* polling is disabled currently */
+               return ERROR_OK;
+       }
+
        /* we do not want to recurse here... */
-       static int recursive = 0;
-       if (! recursive)
-       {
+       static int recursive;
+       if (!recursive) {
                recursive = 1;
                sense_handler();
                /* danger! running these procedures can trigger srst assertions and power dropouts.
@@ -1792,31 +2347,26 @@ int handle_target(void *priv)
                 * clearing the flags after running these events.
                 */
                int did_something = 0;
-               if (runSrstAsserted)
-               {
-                       target_call_event_callbacks_all(TARGET_EVENT_GDB_HALT);
+               if (runSrstAsserted) {
+                       LOG_INFO("srst asserted detected, running srst_asserted proc.");
                        Jim_Eval(interp, "srst_asserted");
                        did_something = 1;
                }
-               if (runSrstDeasserted)
-               {
+               if (runSrstDeasserted) {
                        Jim_Eval(interp, "srst_deasserted");
                        did_something = 1;
                }
-               if (runPowerDropout)
-               {
-                       target_call_event_callbacks_all(TARGET_EVENT_GDB_HALT);
+               if (runPowerDropout) {
+                       LOG_INFO("Power dropout detected, running power_dropout proc.");
                        Jim_Eval(interp, "power_dropout");
                        did_something = 1;
                }
-               if (runPowerRestore)
-               {
+               if (runPowerRestore) {
                        Jim_Eval(interp, "power_restore");
                        did_something = 1;
                }
 
-               if (did_something)
-               {
+               if (did_something) {
                        /* clear detect flags */
                        sense_handler();
                }
@@ -1836,21 +2386,56 @@ int handle_target(void *priv)
         */
        for (struct target *target = all_targets;
                        is_jtag_poll_safe() && target;
-                       target = target->next)
-       {
+                       target = target->next) {
+
+               if (!target_was_examined(target))
+                       continue;
+
                if (!target->tap->enabled)
                        continue;
 
+               if (target->backoff.times > target->backoff.count) {
+                       /* do not poll this time as we failed previously */
+                       target->backoff.count++;
+                       continue;
+               }
+               target->backoff.count = 0;
+
                /* only poll target if we've got power and srst isn't asserted */
-               if (!powerDropout && !srstAsserted)
-               {
+               if (!powerDropout && !srstAsserted) {
                        /* polling may fail silently until the target has been examined */
-                       if ((retval = target_poll(target)) != ERROR_OK)
-                       {
+                       retval = target_poll(target);
+                       if (retval != ERROR_OK) {
+                               /* 100ms polling interval. Increase interval between polling up to 5000ms */
+                               if (target->backoff.times * polling_interval < 5000) {
+                                       target->backoff.times *= 2;
+                                       target->backoff.times++;
+                               }
+                               LOG_USER("Polling target %s failed, GDB will be halted. Polling again in %dms",
+                                               target_name(target),
+                                               target->backoff.times * polling_interval);
+
+                               /* Tell GDB to halt the debugger. This allows the user to
+                                * run monitor commands to handle the situation.
+                                */
                                target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
                                return retval;
                        }
-               }
+                       /* Since we succeeded, we reset backoff count */
+                       if (target->backoff.times > 0) {
+                               LOG_USER("Polling target %s succeeded again, trying to reexamine", target_name(target));
+                               target_reset_examined(target);
+                               retval = target_examine_one(target);
+                               /* Target examination could have failed due to unstable connection,
+                                * but we set the examined flag anyway to repoll it later */
+                               if (retval != ERROR_OK) {
+                                       target->examined = true;
+                                       return retval;
+                               }
+                       }
+
+                       target->backoff.times = 0;
+               }
        }
 
        return retval;
@@ -1860,34 +2445,31 @@ COMMAND_HANDLER(handle_reg_command)
 {
        struct target *target;
        struct reg *reg = NULL;
-       int count = 0;
+       unsigned count = 0;
        char *value;
 
        LOG_DEBUG("-");
 
-       target = get_current_target(cmd_ctx);
+       target = get_current_target(CMD_CTX);
 
        /* list all available registers for the current target */
-       if (CMD_ARGC == 0)
-       {
+       if (CMD_ARGC == 0) {
                struct reg_cache *cache = target->reg_cache;
 
                count = 0;
-               while (cache)
-               {
-                       int i;
+               while (cache) {
+                       unsigned i;
 
-                       command_print(cmd_ctx, "===== %s", cache->name);
+                       command_print(CMD_CTX, "===== %s", cache->name);
 
                        for (i = 0, reg = cache->reg_list;
                                        i < cache->num_regs;
-                                       i++, reg++, count++)
-                       {
+                                       i++, reg++, count++) {
                                /* only print cached values if they are valid */
                                if (reg->valid) {
                                        value = buf_to_str(reg->value,
                                                        reg->size, 16);
-                                       command_print(cmd_ctx,
+                                       command_print(CMD_CTX,
                                                        "(%i) %s (/%" PRIu32 "): 0x%s%s",
                                                        count, reg->name,
                                                        reg->size, value,
@@ -1896,7 +2478,7 @@ COMMAND_HANDLER(handle_reg_command)
                                                                : "");
                                        free(value);
                                } else {
-                                       command_print(cmd_ctx, "(%i) %s (/%" PRIu32 ")",
+                                       command_print(CMD_CTX, "(%i) %s (/%" PRIu32 ")",
                                                          count, reg->name,
                                                          reg->size) ;
                                }
@@ -1908,20 +2490,16 @@ COMMAND_HANDLER(handle_reg_command)
        }
 
        /* access a single register by its ordinal number */
-       if ((args[0][0] >= '0') && (args[0][0] <= '9'))
-       {
+       if ((CMD_ARGV[0][0] >= '0') && (CMD_ARGV[0][0] <= '9')) {
                unsigned num;
-               COMMAND_PARSE_NUMBER(uint, args[0], num);
+               COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], num);
 
                struct reg_cache *cache = target->reg_cache;
                count = 0;
-               while (cache)
-               {
-                       int i;
-                       for (i = 0; i < cache->num_regs; i++)
-                       {
-                               if (count++ == (int)num)
-                               {
+               while (cache) {
+                       unsigned i;
+                       for (i = 0; i < cache->num_regs; i++) {
+                               if (count++ == num) {
                                        reg = &cache->reg_list[i];
                                        break;
                                }
@@ -1931,48 +2509,48 @@ COMMAND_HANDLER(handle_reg_command)
                        cache = cache->next;
                }
 
-               if (!reg)
-               {
-                       command_print(cmd_ctx, "%i is out of bounds, the current target has only %i registers (0 - %i)", num, count, count - 1);
+               if (!reg) {
+                       command_print(CMD_CTX, "%i is out of bounds, the current target "
+                                       "has only %i registers (0 - %i)", num, count, count - 1);
                        return ERROR_OK;
                }
-       } else /* access a single register by its name */
-       {
-               reg = register_get_by_name(target->reg_cache, args[0], 1);
+       } else {
+               /* 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", args[0]);
+               if (!reg) {
+                       command_print(CMD_CTX, "register %s not found in current target", CMD_ARGV[0]);
                        return ERROR_OK;
                }
        }
 
+       assert(reg != NULL); /* give clang a hint that we *know* reg is != NULL here */
+
        /* display a register */
-       if ((CMD_ARGC == 1) || ((CMD_ARGC == 2) && !((args[1][0] >= '0') && (args[1][0] <= '9'))))
-       {
-               if ((CMD_ARGC == 2) && (strcmp(args[1], "force") == 0))
+       if ((CMD_ARGC == 1) || ((CMD_ARGC == 2) && !((CMD_ARGV[1][0] >= '0')
+                       && (CMD_ARGV[1][0] <= '9')))) {
+               if ((CMD_ARGC == 2) && (strcmp(CMD_ARGV[1], "force") == 0))
                        reg->valid = 0;
 
                if (reg->valid == 0)
-               {
                        reg->type->get(reg);
-               }
                value = buf_to_str(reg->value, reg->size, 16);
-               command_print(cmd_ctx, "%s (/%i): 0x%s", reg->name, (int)(reg->size), value);
+               command_print(CMD_CTX, "%s (/%i): 0x%s", reg->name, (int)(reg->size), value);
                free(value);
                return ERROR_OK;
        }
 
        /* set register value */
-       if (CMD_ARGC == 2)
-       {
+       if (CMD_ARGC == 2) {
                uint8_t *buf = malloc(DIV_ROUND_UP(reg->size, 8));
-               str_to_buf(args[1], strlen(args[1]), buf, reg->size, 0);
+               if (buf == NULL)
+                       return ERROR_FAIL;
+               str_to_buf(CMD_ARGV[1], strlen(CMD_ARGV[1]), buf, reg->size, 0);
 
                reg->type->set(reg, buf);
 
                value = buf_to_str(reg->value, reg->size, 16);
-               command_print(cmd_ctx, "%s (/%i): 0x%s", reg->name, (int)(reg->size), value);
+               command_print(CMD_CTX, "%s (/%i): 0x%s", reg->name, (int)(reg->size), value);
                free(value);
 
                free(buf);
@@ -1980,49 +2558,34 @@ COMMAND_HANDLER(handle_reg_command)
                return ERROR_OK;
        }
 
-       command_print(cmd_ctx, "usage: reg <#|name> [value]");
-
-       return ERROR_OK;
+       return ERROR_COMMAND_SYNTAX_ERROR;
 }
 
 COMMAND_HANDLER(handle_poll_command)
 {
        int retval = ERROR_OK;
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
 
-       if (CMD_ARGC == 0)
-       {
-               command_print(cmd_ctx, "background polling: %s",
+       if (CMD_ARGC == 0) {
+               command_print(CMD_CTX, "background polling: %s",
                                jtag_poll_get_enabled() ? "on" : "off");
-               command_print(cmd_ctx, "TAP: %s (%s)",
+               command_print(CMD_CTX, "TAP: %s (%s)",
                                target->tap->dotted_name,
                                target->tap->enabled ? "enabled" : "disabled");
                if (!target->tap->enabled)
                        return ERROR_OK;
-               if ((retval = target_poll(target)) != ERROR_OK)
+               retval = target_poll(target);
+               if (retval != ERROR_OK)
                        return retval;
-               if ((retval = target_arch_state(target)) != ERROR_OK)
+               retval = target_arch_state(target);
+               if (retval != ERROR_OK)
                        return retval;
-
-       }
-       else if (CMD_ARGC == 1)
-       {
-               if (strcmp(args[0], "on") == 0)
-               {
-                       jtag_poll_set_enabled(true);
-               }
-               else if (strcmp(args[0], "off") == 0)
-               {
-                       jtag_poll_set_enabled(false);
-               }
-               else
-               {
-                       command_print(cmd_ctx, "arg is \"on\" or \"off\"");
-               }
+       } else if (CMD_ARGC == 1) {
+               bool enable;
+               COMMAND_PARSE_ON_OFF(CMD_ARGV[0], enable);
+               jtag_poll_set_enabled(enable);
        } else
-       {
                return ERROR_COMMAND_SYNTAX_ERROR;
-       }
 
        return retval;
 }
@@ -2032,20 +2595,14 @@ COMMAND_HANDLER(handle_wait_halt_command)
        if (CMD_ARGC > 1)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
-       unsigned ms = 5000;
-       if (1 == CMD_ARGC)
-       {
-               int retval = parse_uint(args[0], &ms);
+       unsigned ms = DEFAULT_HALT_TIMEOUT;
+       if (1 == CMD_ARGC) {
+               int retval = parse_uint(CMD_ARGV[0], &ms);
                if (ERROR_OK != retval)
-               {
-                       command_print(cmd_ctx, "usage: %s [seconds]", CMD_NAME);
                        return ERROR_COMMAND_SYNTAX_ERROR;
-               }
-               // convert seconds (given) to milliseconds (needed)
-               ms *= 1000;
        }
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
        return target_wait_state(target, TARGET_HALTED, ms);
 }
 
@@ -2061,32 +2618,26 @@ int target_wait_state(struct target *target, enum target_state state, int ms)
        long long then = 0, cur;
        int once = 1;
 
-       for (;;)
-       {
-               if ((retval = target_poll(target)) != ERROR_OK)
+       for (;;) {
+               retval = target_poll(target);
+               if (retval != ERROR_OK)
                        return retval;
                if (target->state == state)
-               {
                        break;
-               }
                cur = timeval_ms();
-               if (once)
-               {
+               if (once) {
                        once = 0;
                        then = timeval_ms();
                        LOG_DEBUG("waiting for target %s...",
-                               Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
+                               Jim_Nvp_value2name_simple(nvp_target_state, state)->name);
                }
 
                if (cur-then > 500)
-               {
                        keep_alive();
-               }
 
-               if ((cur-then) > ms)
-               {
+               if ((cur-then) > ms) {
                        LOG_ERROR("timed out while waiting for target %s",
-                               Jim_Nvp_value2name_simple(nvp_target_state,state)->name);
+                               Jim_Nvp_value2name_simple(nvp_target_state, state)->name);
                        return ERROR_FAIL;
                }
        }
@@ -2098,18 +2649,17 @@ COMMAND_HANDLER(handle_halt_command)
 {
        LOG_DEBUG("-");
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
        int retval = target_halt(target);
        if (ERROR_OK != retval)
                return retval;
 
-       if (CMD_ARGC == 1)
-       {
-               unsigned wait;
-               retval = parse_uint(args[0], &wait);
+       if (CMD_ARGC == 1) {
+               unsigned wait_local;
+               retval = parse_uint(CMD_ARGV[0], &wait_local);
                if (ERROR_OK != retval)
                        return ERROR_COMMAND_SYNTAX_ERROR;
-               if (!wait)
+               if (!wait_local)
                        return ERROR_OK;
        }
 
@@ -2118,11 +2668,11 @@ COMMAND_HANDLER(handle_halt_command)
 
 COMMAND_HANDLER(handle_soft_reset_halt_command)
 {
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
 
        LOG_USER("requesting target halt and executing a soft reset");
 
-       target->type->soft_reset_halt(target);
+       target_soft_reset_halt(target);
 
        return ERROR_OK;
 }
@@ -2133,18 +2683,16 @@ COMMAND_HANDLER(handle_reset_command)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        enum target_reset_mode reset_mode = RESET_RUN;
-       if (CMD_ARGC == 1)
-       {
+       if (CMD_ARGC == 1) {
                const Jim_Nvp *n;
-               n = Jim_Nvp_name2value_simple(nvp_reset_modes, args[0]);
-               if ((n->name == NULL) || (n->value == RESET_UNKNOWN)) {
+               n = Jim_Nvp_name2value_simple(nvp_reset_modes, CMD_ARGV[0]);
+               if ((n->name == NULL) || (n->value == RESET_UNKNOWN))
                        return ERROR_COMMAND_SYNTAX_ERROR;
-               }
                reset_mode = n->value;
        }
 
        /* reset *all* targets */
-       return target_process_reset(cmd_ctx, reset_mode);
+       return target_process_reset(CMD_CTX, reset_mode);
 }
 
 
@@ -2154,16 +2702,14 @@ COMMAND_HANDLER(handle_resume_command)
        if (CMD_ARGC > 1)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
-       struct target *target = get_current_target(cmd_ctx);
-       target_handle_event(target, TARGET_EVENT_OLD_pre_resume);
+       struct target *target = get_current_target(CMD_CTX);
 
-       /* with no args, resume from current pc, addr = 0,
-        * with one arguments, addr = args[0],
+       /* with no CMD_ARGV, resume from current pc, addr = 0,
+        * with one arguments, addr = CMD_ARGV[0],
         * handle breakpoints, not debugging */
        uint32_t addr = 0;
-       if (CMD_ARGC == 1)
-       {
-               COMMAND_PARSE_NUMBER(u32, args[0], addr);
+       if (CMD_ARGC == 1) {
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
                current = 0;
        }
 
@@ -2177,18 +2723,17 @@ COMMAND_HANDLER(handle_step_command)
 
        LOG_DEBUG("-");
 
-       /* with no args, step from current pc, addr = 0,
-        * with one argument addr = args[0],
+       /* with no CMD_ARGV, step from current pc, addr = 0,
+        * with one argument addr = CMD_ARGV[0],
         * handle breakpoints, debugging */
        uint32_t addr = 0;
        int current_pc = 1;
-       if (CMD_ARGC == 1)
-       {
-               COMMAND_PARSE_NUMBER(u32, args[0], addr);
+       if (CMD_ARGC == 1) {
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
                current_pc = 0;
        }
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
 
        return target->type->step(target, current_pc, addr, 1);
 }
@@ -2205,18 +2750,23 @@ static void handle_md_output(struct command_context *cmd_ctx,
 
        const char *value_fmt;
        switch (size) {
-       case 4: value_fmt = "%8.8x "; break;
-       case 2: value_fmt = "%4.2x "; break;
-       case 1: value_fmt = "%2.2x "; break;
+       case 4:
+               value_fmt = "%8.8x ";
+               break;
+       case 2:
+               value_fmt = "%4.4x ";
+               break;
+       case 1:
+               value_fmt = "%2.2x ";
+               break;
        default:
+               /* "can't happen", caller checked */
                LOG_ERROR("invalid memory read size: %u", size);
-               exit(-1);
+               return;
        }
 
-       for (unsigned i = 0; i < count; i++)
-       {
-               if (i % line_modulo == 0)
-               {
+       for (unsigned i = 0; i < count; i++) {
+               if (i % line_modulo == 0) {
                        output_len += snprintf(output + output_len,
                                        sizeof(output) - output_len,
                                        "0x%8.8x: ",
@@ -2226,16 +2776,20 @@ static void handle_md_output(struct command_context *cmd_ctx,
                uint32_t value = 0;
                const uint8_t *value_ptr = buffer + i * size;
                switch (size) {
-               case 4: value = target_buffer_get_u32(target, value_ptr); break;
-               case 2: value = target_buffer_get_u16(target, value_ptr); break;
-               case 1: value = *value_ptr;
+               case 4:
+                       value = target_buffer_get_u32(target, value_ptr);
+                       break;
+               case 2:
+                       value = target_buffer_get_u16(target, value_ptr);
+                       break;
+               case 1:
+                       value = *value_ptr;
                }
                output_len += snprintf(output + output_len,
                                sizeof(output) - output_len,
                                value_fmt, value);
 
-               if ((i % line_modulo == line_modulo - 1) || (i == count - 1))
-               {
+               if ((i % line_modulo == line_modulo - 1) || (i == count - 1)) {
                        command_print(cmd_ctx, "%s", output);
                        output_len = 0;
                }
@@ -2248,116 +2802,152 @@ COMMAND_HANDLER(handle_md_command)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        unsigned size = 0;
-       const char *cmd_name = CMD_NAME;
-       switch (cmd_name[6]) {
-       case 'w': size = 4; break;
-       case 'h': size = 2; break;
-       case 'b': size = 1; break;
-       default: return ERROR_COMMAND_SYNTAX_ERROR;
+       switch (CMD_NAME[2]) {
+       case 'w':
+               size = 4;
+               break;
+       case 'h':
+               size = 2;
+               break;
+       case 'b':
+               size = 1;
+               break;
+       default:
+               return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
-       bool physical=strcmp(args[0], "phys")==0;
+       bool physical = strcmp(CMD_ARGV[0], "phys") == 0;
        int (*fn)(struct target *target,
-                       uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
-       if (physical)
-       {
+                       uint32_t address, uint32_t size_value, uint32_t count, uint8_t *buffer);
+       if (physical) {
                CMD_ARGC--;
-               args++;
-               fn=target_read_phys_memory;
+               CMD_ARGV++;
+               fn = target_read_phys_memory;
        } else
-       {
-               fn=target_read_memory;
-       }
+               fn = target_read_memory;
        if ((CMD_ARGC < 1) || (CMD_ARGC > 2))
-       {
                return ERROR_COMMAND_SYNTAX_ERROR;
-       }
 
        uint32_t address;
-       COMMAND_PARSE_NUMBER(u32, args[0], address);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
 
        unsigned count = 1;
        if (CMD_ARGC == 2)
-               COMMAND_PARSE_NUMBER(uint, args[1], count);
+               COMMAND_PARSE_NUMBER(uint, CMD_ARGV[1], count);
 
        uint8_t *buffer = calloc(count, size);
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
        int retval = fn(target, address, size, count, buffer);
        if (ERROR_OK == retval)
-               handle_md_output(cmd_ctx, target, address, size, count, buffer);
+               handle_md_output(CMD_CTX, target, address, size, count, buffer);
 
        free(buffer);
 
        return retval;
 }
 
+typedef int (*target_write_fn)(struct target *target,
+               uint32_t address, uint32_t size, uint32_t count, const uint8_t *buffer);
+
+static int target_fill_mem(struct target *target,
+               uint32_t address,
+               target_write_fn fn,
+               unsigned data_size,
+               /* value */
+               uint32_t b,
+               /* count */
+               unsigned c)
+{
+       /* We have to write in reasonably large chunks to be able
+        * to fill large memory areas with any sane speed */
+       const unsigned chunk_size = 16384;
+       uint8_t *target_buf = malloc(chunk_size * data_size);
+       if (target_buf == NULL) {
+               LOG_ERROR("Out of memory");
+               return ERROR_FAIL;
+       }
+
+       for (unsigned i = 0; i < chunk_size; i++) {
+               switch (data_size) {
+               case 4:
+                       target_buffer_set_u32(target, target_buf + i * data_size, b);
+                       break;
+               case 2:
+                       target_buffer_set_u16(target, target_buf + i * data_size, b);
+                       break;
+               case 1:
+                       target_buffer_set_u8(target, target_buf + i * data_size, b);
+                       break;
+               default:
+                       exit(-1);
+               }
+       }
+
+       int retval = ERROR_OK;
+
+       for (unsigned x = 0; x < c; x += chunk_size) {
+               unsigned current;
+               current = c - x;
+               if (current > chunk_size)
+                       current = chunk_size;
+               retval = fn(target, address + x * data_size, data_size, current, target_buf);
+               if (retval != ERROR_OK)
+                       break;
+               /* avoid GDB timeouts */
+               keep_alive();
+       }
+       free(target_buf);
+
+       return retval;
+}
+
+
 COMMAND_HANDLER(handle_mw_command)
 {
        if (CMD_ARGC < 2)
-       {
                return ERROR_COMMAND_SYNTAX_ERROR;
-       }
-       bool physical=strcmp(args[0], "phys")==0;
-       int (*fn)(struct target *target,
-                       uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
-       const char *cmd_name = CMD_NAME;
-       if (physical)
-       {
+       bool physical = strcmp(CMD_ARGV[0], "phys") == 0;
+       target_write_fn fn;
+       if (physical) {
                CMD_ARGC--;
-               args++;
-               fn=target_write_phys_memory;
+               CMD_ARGV++;
+               fn = target_write_phys_memory;
        } else
-       {
-               fn=target_write_memory;
-       }
+               fn = target_write_memory;
        if ((CMD_ARGC < 2) || (CMD_ARGC > 3))
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        uint32_t address;
-       COMMAND_PARSE_NUMBER(u32, args[0], address);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
 
        uint32_t value;
-       COMMAND_PARSE_NUMBER(u32, args[1], value);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], value);
 
        unsigned count = 1;
        if (CMD_ARGC == 3)
-               COMMAND_PARSE_NUMBER(uint, args[2], count);
+               COMMAND_PARSE_NUMBER(uint, CMD_ARGV[2], count);
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
        unsigned wordsize;
-       uint8_t value_buf[4];
-       switch (cmd_name[6])
-       {
+       switch (CMD_NAME[2]) {
                case 'w':
                        wordsize = 4;
-                       target_buffer_set_u32(target, value_buf, value);
                        break;
                case 'h':
                        wordsize = 2;
-                       target_buffer_set_u16(target, value_buf, value);
                        break;
                case 'b':
                        wordsize = 1;
-                       value_buf[0] = value;
                        break;
                default:
                        return ERROR_COMMAND_SYNTAX_ERROR;
        }
-       for (unsigned i = 0; i < count; i++)
-       {
-               int retval = fn(target,
-                               address + i * wordsize, wordsize, 1, value_buf);
-               if (ERROR_OK != retval)
-                       return retval;
-               keep_alive();
-       }
-
-       return ERROR_OK;
 
+       return target_fill_mem(target, address, fn, wordsize, value, count);
 }
 
-static COMMAND_HELPER(parse_load_image_command_args, struct image *image,
+static COMMAND_HELPER(parse_load_image_command_CMD_ARGV, struct image *image,
                uint32_t *min_address, uint32_t *max_address)
 {
        if (CMD_ARGC < 1 || CMD_ARGC > 5)
@@ -2365,26 +2955,21 @@ static COMMAND_HELPER(parse_load_image_command_args, struct image *image,
 
        /* a base address isn't always necessary,
         * default to 0x0 (i.e. don't relocate) */
-       if (CMD_ARGC >= 2)
-       {
+       if (CMD_ARGC >= 2) {
                uint32_t addr;
-               COMMAND_PARSE_NUMBER(u32, args[1], addr);
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], addr);
                image->base_address = addr;
                image->base_address_set = 1;
-       }
-       else
+       } else
                image->base_address_set = 0;
 
        image->start_address_set = 0;
 
        if (CMD_ARGC >= 4)
-       {
-               COMMAND_PARSE_NUMBER(u32, args[3], *min_address);
-       }
-       if (CMD_ARGC == 5)
-       {
-               COMMAND_PARSE_NUMBER(u32, args[4], *max_address);
-               // use size (given) to find max (required)
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[3], *min_address);
+       if (CMD_ARGC == 5) {
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[4], *max_address);
+               /* use size (given) to find max (required) */
                *max_address += *min_address;
        }
 
@@ -2404,36 +2989,32 @@ COMMAND_HANDLER(handle_load_image_command)
        int i;
        struct image image;
 
-       int retval = CALL_COMMAND_HANDLER(parse_load_image_command_args,
+       int retval = CALL_COMMAND_HANDLER(parse_load_image_command_CMD_ARGV,
                        &image, &min_address, &max_address);
        if (ERROR_OK != retval)
                return retval;
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
 
        struct duration bench;
        duration_start(&bench);
 
-       if (image_open(&image, args[0], (CMD_ARGC >= 3) ? args[2] : NULL) != ERROR_OK)
-       {
+       if (image_open(&image, CMD_ARGV[0], (CMD_ARGC >= 3) ? CMD_ARGV[2] : NULL) != ERROR_OK)
                return ERROR_OK;
-       }
 
        image_size = 0x0;
        retval = ERROR_OK;
-       for (i = 0; i < image.num_sections; i++)
-       {
+       for (i = 0; i < image.num_sections; i++) {
                buffer = malloc(image.sections[i].size);
-               if (buffer == NULL)
-               {
-                       command_print(cmd_ctx,
+               if (buffer == NULL) {
+                       command_print(CMD_CTX,
                                                  "error allocating buffer for section (%d bytes)",
                                                  (int)(image.sections[i].size));
                        break;
                }
 
-               if ((retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt)) != ERROR_OK)
-               {
+               retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt);
+               if (retval != ERROR_OK) {
                        free(buffer);
                        break;
                }
@@ -2443,39 +3024,36 @@ COMMAND_HANDLER(handle_load_image_command)
 
                /* DANGER!!! beware of unsigned comparision here!!! */
 
-               if ((image.sections[i].base_address + buf_cnt >= min_address)&&
-                               (image.sections[i].base_address < max_address))
-               {
-                       if (image.sections[i].base_address < min_address)
-                       {
+               if ((image.sections[i].base_address + buf_cnt >= min_address) &&
+                               (image.sections[i].base_address < max_address)) {
+
+                       if (image.sections[i].base_address < min_address) {
                                /* clip addresses below */
                                offset += min_address-image.sections[i].base_address;
                                length -= offset;
                        }
 
                        if (image.sections[i].base_address + buf_cnt > max_address)
-                       {
                                length -= (image.sections[i].base_address + buf_cnt)-max_address;
-                       }
 
-                       if ((retval = target_write_buffer(target, image.sections[i].base_address + offset, length, buffer + offset)) != ERROR_OK)
-                       {
+                       retval = target_write_buffer(target,
+                                       image.sections[i].base_address + offset, length, buffer + offset);
+                       if (retval != ERROR_OK) {
                                free(buffer);
                                break;
                        }
                        image_size += length;
-                       command_print(cmd_ctx, "%u bytes written at address 0x%8.8" PRIx32 "",
-                                                 (unsigned int)length,
-                                                 image.sections[i].base_address + offset);
+                       command_print(CMD_CTX, "%u bytes written at address 0x%8.8" PRIx32 "",
+                                       (unsigned int)length,
+                                       image.sections[i].base_address + offset);
                }
 
                free(buffer);
        }
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-       {
-               command_print(cmd_ctx, "downloaded %" PRIu32 " bytes "
-                               "in %fs (%0.3f kb/s)", image_size,
+       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+               command_print(CMD_CTX, "downloaded %" PRIu32 " bytes "
+                               "in %fs (%0.3f KiB/s)", image_size,
                                duration_elapsed(&bench), duration_kbps(&bench, image_size));
        }
 
@@ -2488,63 +3066,62 @@ COMMAND_HANDLER(handle_load_image_command)
 COMMAND_HANDLER(handle_dump_image_command)
 {
        struct fileio fileio;
-
-       uint8_t buffer[560];
-       int retvaltemp;
-
-
-       struct target *target = get_current_target(cmd_ctx);
+       uint8_t *buffer;
+       int retval, retvaltemp;
+       uint32_t address, size;
+       struct duration bench;
+       struct target *target = get_current_target(CMD_CTX);
 
        if (CMD_ARGC != 3)
-       {
-               command_print(cmd_ctx, "usage: dump_image <filename> <address> <size>");
-               return ERROR_OK;
-       }
+               return ERROR_COMMAND_SYNTAX_ERROR;
 
-       uint32_t address;
-       COMMAND_PARSE_NUMBER(u32, args[1], address);
-       uint32_t size;
-       COMMAND_PARSE_NUMBER(u32, args[2], size);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], address);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], size);
 
-       if (fileio_open(&fileio, args[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
-       {
-               return ERROR_OK;
+       uint32_t buf_size = (size > 4096) ? 4096 : size;
+       buffer = malloc(buf_size);
+       if (!buffer)
+               return ERROR_FAIL;
+
+       retval = fileio_open(&fileio, CMD_ARGV[0], FILEIO_WRITE, FILEIO_BINARY);
+       if (retval != ERROR_OK) {
+               free(buffer);
+               return retval;
        }
 
-       struct duration bench;
        duration_start(&bench);
 
-       int retval = ERROR_OK;
-       while (size > 0)
-       {
+       while (size > 0) {
                size_t size_written;
-               uint32_t this_run_size = (size > 560) ? 560 : size;
+               uint32_t this_run_size = (size > buf_size) ? buf_size : size;
                retval = target_read_buffer(target, address, this_run_size, buffer);
                if (retval != ERROR_OK)
-               {
                        break;
-               }
 
                retval = fileio_write(&fileio, this_run_size, buffer, &size_written);
                if (retval != ERROR_OK)
-               {
                        break;
-               }
 
                size -= this_run_size;
                address += this_run_size;
        }
 
-       if ((retvaltemp = fileio_close(&fileio)) != ERROR_OK)
-               return retvaltemp;
+       free(buffer);
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-       {
-               command_print(cmd_ctx,
-                               "dumped %zu bytes in %fs (%0.3f kb/s)", fileio.size,
-                               duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
+       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+               int filesize;
+               retval = fileio_size(&fileio, &filesize);
+               if (retval != ERROR_OK)
+                       return retval;
+               command_print(CMD_CTX,
+                               "dumped %ld bytes in %fs (%0.3f KiB/s)", (long)filesize,
+                               duration_elapsed(&bench), duration_kbps(&bench, filesize));
        }
 
+       retvaltemp = fileio_close(&fileio);
+       if (retvaltemp != ERROR_OK)
+               return retvaltemp;
+
        return retval;
 }
 
@@ -2560,15 +3137,12 @@ static COMMAND_HELPER(handle_verify_image_command_internal, int verify)
 
        struct image image;
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
 
        if (CMD_ARGC < 1)
-       {
                return ERROR_COMMAND_SYNTAX_ERROR;
-       }
 
-       if (!target)
-       {
+       if (!target) {
                LOG_ERROR("no target selected");
                return ERROR_FAIL;
        }
@@ -2576,103 +3150,94 @@ static COMMAND_HELPER(handle_verify_image_command_internal, int verify)
        struct duration bench;
        duration_start(&bench);
 
-       if (CMD_ARGC >= 2)
-       {
+       if (CMD_ARGC >= 2) {
                uint32_t addr;
-               COMMAND_PARSE_NUMBER(u32, args[1], addr);
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], addr);
                image.base_address = addr;
                image.base_address_set = 1;
-       }
-       else
-       {
+       } else {
                image.base_address_set = 0;
                image.base_address = 0x0;
        }
 
        image.start_address_set = 0;
 
-       if ((retval = image_open(&image, args[0], (CMD_ARGC == 3) ? args[2] : NULL)) != ERROR_OK)
-       {
+       retval = image_open(&image, CMD_ARGV[0], (CMD_ARGC == 3) ? CMD_ARGV[2] : NULL);
+       if (retval != ERROR_OK)
                return retval;
-       }
 
        image_size = 0x0;
+       int diffs = 0;
        retval = ERROR_OK;
-       for (i = 0; i < image.num_sections; i++)
-       {
+       for (i = 0; i < image.num_sections; i++) {
                buffer = malloc(image.sections[i].size);
-               if (buffer == NULL)
-               {
-                       command_print(cmd_ctx,
-                                                 "error allocating buffer for section (%d bytes)",
-                                                 (int)(image.sections[i].size));
+               if (buffer == NULL) {
+                       command_print(CMD_CTX,
+                                       "error allocating buffer for section (%d bytes)",
+                                       (int)(image.sections[i].size));
                        break;
                }
-               if ((retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt)) != ERROR_OK)
-               {
+               retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt);
+               if (retval != ERROR_OK) {
                        free(buffer);
                        break;
                }
 
-               if (verify)
-               {
+               if (verify) {
                        /* calculate checksum of image */
-                       image_calculate_checksum(buffer, buf_cnt, &checksum);
+                       retval = image_calculate_checksum(buffer, buf_cnt, &checksum);
+                       if (retval != ERROR_OK) {
+                               free(buffer);
+                               break;
+                       }
 
                        retval = target_checksum_memory(target, image.sections[i].base_address, buf_cnt, &mem_checksum);
-                       if (retval != ERROR_OK)
-                       {
+                       if (retval != ERROR_OK) {
                                free(buffer);
                                break;
                        }
 
-                       if (checksum != mem_checksum)
-                       {
+                       if (checksum != mem_checksum) {
                                /* failed crc checksum, fall back to a binary compare */
                                uint8_t *data;
 
-                               command_print(cmd_ctx, "checksum mismatch - attempting binary compare");
+                               if (diffs == 0)
+                                       LOG_ERROR("checksum mismatch - attempting binary compare");
 
-                               data = (uint8_t*)malloc(buf_cnt);
+                               data = malloc(buf_cnt);
 
                                /* Can we use 32bit word accesses? */
                                int size = 1;
                                int count = buf_cnt;
-                               if ((count % 4) == 0)
-                               {
+                               if ((count % 4) == 0) {
                                        size *= 4;
                                        count /= 4;
                                }
                                retval = target_read_memory(target, image.sections[i].base_address, size, count, data);
-                               if (retval == ERROR_OK)
-                               {
+                               if (retval == ERROR_OK) {
                                        uint32_t t;
-                                       for (t = 0; t < buf_cnt; t++)
-                                       {
-                                               if (data[t] != buffer[t])
-                                               {
-                                                       command_print(cmd_ctx,
-                                                                                 "Verify operation failed address 0x%08x. Was 0x%02x instead of 0x%02x\n",
+                                       for (t = 0; t < buf_cnt; t++) {
+                                               if (data[t] != buffer[t]) {
+                                                       command_print(CMD_CTX,
+                                                                                 "diff %d address 0x%08x. Was 0x%02x instead of 0x%02x",
+                                                                                 diffs,
                                                                                  (unsigned)(t + image.sections[i].base_address),
                                                                                  data[t],
                                                                                  buffer[t]);
-                                                       free(data);
-                                                       free(buffer);
-                                                       retval = ERROR_FAIL;
-                                                       goto done;
-                                               }
-                                               if ((t%16384) == 0)
-                                               {
-                                                       keep_alive();
+                                                       if (diffs++ >= 127) {
+                                                               command_print(CMD_CTX, "More than 128 errors, the rest are not printed.");
+                                                               free(data);
+                                                               free(buffer);
+                                                               goto done;
+                                                       }
                                                }
+                                               keep_alive();
                                        }
                                }
-
                                free(data);
                        }
-               } else
-               {
-                       command_print(cmd_ctx, "address 0x%08" PRIx32 " length 0x%08zx",
+               } else {
+                       command_print(CMD_CTX, "address 0x%08" PRIx32 " length 0x%08zx",
                                                  image.sections[i].base_address,
                                                  buf_cnt);
                }
@@ -2680,11 +3245,14 @@ static COMMAND_HELPER(handle_verify_image_command_internal, int verify)
                free(buffer);
                image_size += buf_cnt;
        }
+       if (diffs > 0)
+               command_print(CMD_CTX, "No more differences found.");
 done:
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-       {
-               command_print(cmd_ctx, "verified %" PRIu32 " bytes "
-                               "in %fs (%0.3f kb/s)", image_size,
+       if (diffs > 0)
+               retval = ERROR_FAIL;
+       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+               command_print(CMD_CTX, "verified %" PRIu32 " bytes "
+                               "in %fs (%0.3f KiB/s)", image_size,
                                duration_elapsed(&bench), duration_kbps(&bench, image_size));
        }
 
@@ -2707,23 +3275,30 @@ static int handle_bp_command_list(struct command_context *cmd_ctx)
 {
        struct target *target = get_current_target(cmd_ctx);
        struct breakpoint *breakpoint = target->breakpoints;
-       while (breakpoint)
-       {
-               if (breakpoint->type == BKPT_SOFT)
-               {
-                       char* buf = buf_to_str(breakpoint->orig_instr,
+       while (breakpoint) {
+               if (breakpoint->type == BKPT_SOFT) {
+                       char *buf = buf_to_str(breakpoint->orig_instr,
                                        breakpoint->length, 16);
-                       command_print(cmd_ctx, "0x%8.8" PRIx32 ", 0x%x, %i, 0x%s",
+                       command_print(cmd_ctx, "IVA breakpoint: 0x%8.8" PRIx32 ", 0x%x, %i, 0x%s",
                                        breakpoint->address,
                                        breakpoint->length,
                                        breakpoint->set, buf);
                        free(buf);
-               }
-               else
-               {
-                       command_print(cmd_ctx, "0x%8.8" PRIx32 ", 0x%x, %i",
-                                                 breakpoint->address,
-                                                 breakpoint->length, breakpoint->set);
+               } else {
+                       if ((breakpoint->address == 0) && (breakpoint->asid != 0))
+                               command_print(cmd_ctx, "Context breakpoint: 0x%8.8" PRIx32 ", 0x%x, %i",
+                                                       breakpoint->asid,
+                                                       breakpoint->length, breakpoint->set);
+                       else if ((breakpoint->address != 0) && (breakpoint->asid != 0)) {
+                               command_print(cmd_ctx, "Hybrid breakpoint(IVA): 0x%8.8" PRIx32 ", 0x%x, %i",
+                                                       breakpoint->address,
+                                                       breakpoint->length, breakpoint->set);
+                               command_print(cmd_ctx, "\t|--->linked with ContextID: 0x%8.8" PRIx32,
+                                                       breakpoint->asid);
+                       } else
+                               command_print(cmd_ctx, "Breakpoint(IVA): 0x%8.8" PRIx32 ", 0x%x, %i",
+                                                       breakpoint->address,
+                                                       breakpoint->length, breakpoint->set);
                }
 
                breakpoint = breakpoint->next;
@@ -2732,43 +3307,82 @@ static int handle_bp_command_list(struct command_context *cmd_ctx)
 }
 
 static int handle_bp_command_set(struct command_context *cmd_ctx,
-               uint32_t addr, uint32_t length, int hw)
+               uint32_t addr, uint32_t asid, uint32_t length, int hw)
 {
        struct target *target = get_current_target(cmd_ctx);
-       int retval = breakpoint_add(target, addr, length, hw);
-       if (ERROR_OK == retval)
-               command_print(cmd_ctx, "breakpoint set at 0x%8.8" PRIx32 "", addr);
-       else
-               LOG_ERROR("Failure setting breakpoint");
-       return retval;
+
+       if (asid == 0) {
+               int retval = breakpoint_add(target, addr, length, hw);
+               if (ERROR_OK == retval)
+                       command_print(cmd_ctx, "breakpoint set at 0x%8.8" PRIx32 "", addr);
+               else {
+                       LOG_ERROR("Failure setting breakpoint, the same address(IVA) is already used");
+                       return retval;
+               }
+       } else if (addr == 0) {
+               int retval = context_breakpoint_add(target, asid, length, hw);
+               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 {
+               int retval = hybrid_breakpoint_add(target, addr, asid, length, hw);
+               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;
 }
 
 COMMAND_HANDLER(handle_bp_command)
 {
-       if (CMD_ARGC == 0)
-               return handle_bp_command_list(cmd_ctx);
-
-       if (CMD_ARGC < 2 || CMD_ARGC > 3)
-       {
-               command_print(cmd_ctx, "usage: bp <address> <length> ['hw']");
-               return ERROR_COMMAND_SYNTAX_ERROR;
-       }
-
        uint32_t addr;
-       COMMAND_PARSE_NUMBER(u32, args[0], addr);
+       uint32_t asid;
        uint32_t length;
-       COMMAND_PARSE_NUMBER(u32, args[1], length);
-
        int hw = BKPT_SOFT;
-       if (CMD_ARGC == 3)
-       {
-               if (strcmp(args[2], "hw") == 0)
+
+       switch (CMD_ARGC) {
+               case 0:
+                       return handle_bp_command_list(CMD_CTX);
+
+               case 2:
+                       asid = 0;
+                       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
+                       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], length);
+                       return handle_bp_command_set(CMD_CTX, addr, asid, length, hw);
+
+               case 3:
+                       if (strcmp(CMD_ARGV[2], "hw") == 0) {
+                               hw = BKPT_HARD;
+                               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
+
+                               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], length);
+
+                               asid = 0;
+                               return handle_bp_command_set(CMD_CTX, addr, asid, length, hw);
+                       } else if (strcmp(CMD_ARGV[2], "hw_ctx") == 0) {
+                               hw = BKPT_HARD;
+                               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], asid);
+                               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], length);
+                               addr = 0;
+                               return handle_bp_command_set(CMD_CTX, addr, asid, length, hw);
+                       }
+
+               case 4:
                        hw = BKPT_HARD;
-               else
+                       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
+                       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], asid);
+                       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], length);
+                       return handle_bp_command_set(CMD_CTX, addr, asid, length, hw);
+
+               default:
                        return ERROR_COMMAND_SYNTAX_ERROR;
        }
-
-       return handle_bp_command_set(cmd_ctx, addr, length, hw);
 }
 
 COMMAND_HANDLER(handle_rbp_command)
@@ -2777,9 +3391,9 @@ COMMAND_HANDLER(handle_rbp_command)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        uint32_t addr;
-       COMMAND_PARSE_NUMBER(u32, args[0], addr);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
        breakpoint_remove(target, addr);
 
        return ERROR_OK;
@@ -2787,15 +3401,13 @@ COMMAND_HANDLER(handle_rbp_command)
 
 COMMAND_HANDLER(handle_wp_command)
 {
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
 
-       if (CMD_ARGC == 0)
-       {
+       if (CMD_ARGC == 0) {
                struct watchpoint *watchpoint = target->watchpoints;
 
-               while (watchpoint)
-               {
-                       command_print(cmd_ctx, "address: 0x%8.8" PRIx32
+               while (watchpoint) {
+                       command_print(CMD_CTX, "address: 0x%8.8" PRIx32
                                        ", len: 0x%8.8" PRIx32
                                        ", r/w/a: %i, value: 0x%8.8" PRIx32
                                        ", mask: 0x%8.8" PRIx32,
@@ -2815,17 +3427,15 @@ COMMAND_HANDLER(handle_wp_command)
        uint32_t data_value = 0x0;
        uint32_t data_mask = 0xffffffff;
 
-       switch (CMD_ARGC)
-       {
+       switch (CMD_ARGC) {
        case 5:
-               COMMAND_PARSE_NUMBER(u32, args[4], data_mask);
-               // fall through
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[4], data_mask);
+               /* fall through */
        case 4:
-               COMMAND_PARSE_NUMBER(u32, args[3], data_value);
-               // fall through
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[3], data_value);
+               /* fall through */
        case 3:
-               switch (args[2][0])
-               {
+               switch (CMD_ARGV[2][0]) {
                case 'r':
                        type = WPT_READ;
                        break;
@@ -2836,18 +3446,16 @@ COMMAND_HANDLER(handle_wp_command)
                        type = WPT_ACCESS;
                        break;
                default:
-                       LOG_ERROR("invalid watchpoint mode ('%c')", args[2][0]);
+                       LOG_ERROR("invalid watchpoint mode ('%c')", CMD_ARGV[2][0]);
                        return ERROR_COMMAND_SYNTAX_ERROR;
                }
-               // fall through
+               /* fall through */
        case 2:
-               COMMAND_PARSE_NUMBER(u32, args[1], length);
-               COMMAND_PARSE_NUMBER(u32, args[0], addr);
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], length);
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
                break;
 
        default:
-               command_print(cmd_ctx, "usage: wp [address length "
-                               "[(r|w|a) [value [mask]]]]");
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
@@ -2865,15 +3473,14 @@ COMMAND_HANDLER(handle_rwp_command)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        uint32_t addr;
-       COMMAND_PARSE_NUMBER(u32, args[0], addr);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
        watchpoint_remove(target, addr);
 
        return ERROR_OK;
 }
 
-
 /**
  * Translate a virtual address to a physical address.
  *
@@ -2886,13 +3493,13 @@ COMMAND_HANDLER(handle_virt2phys_command)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
        uint32_t va;
-       COMMAND_PARSE_NUMBER(u32, args[0], va);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], va);
        uint32_t pa;
 
-       struct target *target = get_current_target(cmd_ctx);
+       struct target *target = get_current_target(CMD_CTX);
        int retval = target->type->virt2phys(target, va, &pa);
        if (retval == ERROR_OK)
-               command_print(cmd_ctx, "Physical address 0x%08" PRIx32 "", pa);
+               command_print(CMD_CTX, "Physical address 0x%08" PRIx32 "", pa);
 
        return retval;
 }
@@ -2907,8 +3514,7 @@ static void writeData(FILE *f, const void *data, size_t len)
 static void writeLong(FILE *f, int l)
 {
        int i;
-       for (i = 0; i < 4; i++)
-       {
+       for (i = 0; i < 4; i++) {
                char c = (l >> (i*8))&0xff;
                writeData(f, &c, 1);
        }
@@ -2920,8 +3526,11 @@ static void writeString(FILE *f, char *s)
        writeData(f, s, strlen(s));
 }
 
+typedef unsigned char UNIT[2];  /* unit of profiling */
+
 /* Dump a gmon.out histogram file. */
-static void writeGmon(uint32_t *samples, uint32_t sampleNum, const char *filename)
+static void write_gmon(uint32_t *samples, uint32_t sampleNum, const char *filename,
+               bool with_range, uint32_t start_address, uint32_t end_address)
 {
        uint32_t i;
        FILE *f = fopen(filename, "w");
@@ -2937,50 +3546,59 @@ static void writeGmon(uint32_t *samples, uint32_t sampleNum, const char *filenam
        writeData(f, &zero, 1);
 
        /* figure out bucket size */
-       uint32_t min = samples[0];
-       uint32_t max = samples[0];
-       for (i = 0; i < sampleNum; i++)
-       {
-               if (min > samples[i])
-               {
-                       min = samples[i];
-               }
-               if (max < samples[i])
-               {
-                       max = samples[i];
-               }
-       }
-
-       int addressSpace = (max-min + 1);
-
-       static const uint32_t maxBuckets = 256 * 1024; /* maximum buckets. */
-       uint32_t length = addressSpace;
-       if (length > maxBuckets)
-       {
-               length = maxBuckets;
-       }
-       int *buckets = malloc(sizeof(int)*length);
-       if (buckets == NULL)
-       {
+       uint32_t min;
+       uint32_t max;
+       if (with_range) {
+               min = start_address;
+               max = end_address;
+       } else {
+               min = samples[0];
+               max = samples[0];
+               for (i = 0; i < sampleNum; i++) {
+                       if (min > samples[i])
+                               min = samples[i];
+                       if (max < samples[i])
+                               max = samples[i];
+               }
+
+               /* max should be (largest sample + 1)
+                * Refer to binutils/gprof/hist.c (find_histogram_for_pc) */
+               max++;
+       }
+
+       int addressSpace = max - min;
+       assert(addressSpace >= 2);
+
+       /* FIXME: What is the reasonable number of buckets?
+        * The profiling result will be more accurate if there are enough buckets. */
+       static const uint32_t maxBuckets = 128 * 1024; /* maximum buckets. */
+       uint32_t numBuckets = addressSpace / sizeof(UNIT);
+       if (numBuckets > maxBuckets)
+               numBuckets = maxBuckets;
+       int *buckets = malloc(sizeof(int) * numBuckets);
+       if (buckets == NULL) {
                fclose(f);
                return;
        }
-       memset(buckets, 0, sizeof(int)*length);
-       for (i = 0; i < sampleNum;i++)
-       {
+       memset(buckets, 0, sizeof(int) * numBuckets);
+       for (i = 0; i < sampleNum; i++) {
                uint32_t address = samples[i];
-               long long a = address-min;
-               long long b = length-1;
-               long long c = addressSpace-1;
-               int index = (a*b)/c; /* danger!!!! int32 overflows */
-               buckets[index]++;
+
+               if ((address < min) || (max <= address))
+                       continue;
+
+               long long a = address - min;
+               long long b = numBuckets;
+               long long c = addressSpace;
+               int index_t = (a * b) / c; /* danger!!!! int32 overflows */
+               buckets[index_t]++;
        }
 
        /* append binary memory gmon.out &profile_hist_hdr ((char*)&profile_hist_hdr + sizeof(struct gmon_hist_hdr)) */
-       writeLong(f, min);                      /* low_pc */
+       writeLong(f, min);                      /* low_pc */
        writeLong(f, max);                      /* high_pc */
-       writeLong(f, length);           /* # of samples */
-       writeLong(f, 64000000);         /* 64MHz */
+       writeLong(f, numBuckets);       /* # of buckets */
+       writeLong(f, 100);                      /* KLUDGE! We lie, ca. 100Hz best case. */
        writeString(f, "seconds");
        for (i = 0; i < (15-strlen("seconds")); i++)
                writeData(f, &zero, 1);
@@ -2988,117 +3606,98 @@ static void writeGmon(uint32_t *samples, uint32_t sampleNum, const char *filenam
 
        /*append binary memory gmon.out profile_hist_data (profile_hist_data + profile_hist_hdr.hist_size) */
 
-       char *data = malloc(2*length);
-       if (data != NULL)
-       {
-               for (i = 0; i < length;i++)
-               {
+       char *data = malloc(2 * numBuckets);
+       if (data != NULL) {
+               for (i = 0; i < numBuckets; i++) {
                        int val;
                        val = buckets[i];
                        if (val > 65535)
-                       {
                                val = 65535;
-                       }
-                       data[i*2]=val&0xff;
-                       data[i*2 + 1]=(val >> 8)&0xff;
+                       data[i * 2] = val&0xff;
+                       data[i * 2 + 1] = (val >> 8) & 0xff;
                }
                free(buckets);
-               writeData(f, data, length * 2);
+               writeData(f, data, numBuckets * 2);
                free(data);
        } else
-       {
                free(buckets);
-       }
 
        fclose(f);
 }
 
-/* profiling samples the CPU PC as quickly as OpenOCD is able, which will be used as a random sampling of PC */
+/* profiling samples the CPU PC as quickly as OpenOCD is able,
+ * which will be used as a random sampling of PC */
 COMMAND_HANDLER(handle_profile_command)
 {
-       struct target *target = get_current_target(cmd_ctx);
-       struct timeval timeout, now;
+       struct target *target = get_current_target(CMD_CTX);
 
-       gettimeofday(&timeout, NULL);
-       if (CMD_ARGC != 2)
-       {
+       if ((CMD_ARGC != 2) && (CMD_ARGC != 4))
                return ERROR_COMMAND_SYNTAX_ERROR;
-       }
-       unsigned offset;
-       COMMAND_PARSE_NUMBER(uint, args[0], offset);
 
-       timeval_add_time(&timeout, offset, 0);
+       const uint32_t MAX_PROFILE_SAMPLE_NUM = 10000;
+       uint32_t offset;
+       uint32_t num_of_samples;
+       int retval = ERROR_OK;
 
-       command_print(cmd_ctx, "Starting profiling. Halting and resuming the target as often as we can...");
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], offset);
 
-       static const int maxSample = 10000;
-       uint32_t *samples = malloc(sizeof(uint32_t)*maxSample);
-       if (samples == NULL)
-               return ERROR_OK;
+       uint32_t *samples = malloc(sizeof(uint32_t) * MAX_PROFILE_SAMPLE_NUM);
+       if (samples == NULL) {
+               LOG_ERROR("No memory to store samples.");
+               return ERROR_FAIL;
+       }
 
-       int numSamples = 0;
-       /* hopefully it is safe to cache! We want to stop/restart as quickly as possible. */
-       struct reg *reg = register_get_by_name(target->reg_cache, "pc", 1);
+       /**
+        * Some cores let us sample the PC without the
+        * annoying halt/resume step; for example, ARMv7 PCSR.
+        * Provide a way to use that more efficient mechanism.
+        */
+       retval = target_profiling(target, samples, MAX_PROFILE_SAMPLE_NUM,
+                               &num_of_samples, offset);
+       if (retval != ERROR_OK) {
+               free(samples);
+               return retval;
+       }
 
-       for (;;)
-       {
-               int retval;
-               target_poll(target);
-               if (target->state == TARGET_HALTED)
-               {
-                       uint32_t t=*((uint32_t *)reg->value);
-                       samples[numSamples++]=t;
-                       retval = target_resume(target, 1, 0, 0, 0); /* current pc, addr = 0, do not handle breakpoints, not debugging */
-                       target_poll(target);
-                       alive_sleep(10); /* sleep 10ms, i.e. <100 samples/second. */
-               } else if (target->state == TARGET_RUNNING)
-               {
-                       /* We want to quickly sample the PC. */
-                       if ((retval = target_halt(target)) != ERROR_OK)
-                       {
-                               free(samples);
-                               return retval;
-                       }
-               } else
-               {
-                       command_print(cmd_ctx, "Target not halted or running");
-                       retval = ERROR_OK;
-                       break;
-               }
-               if (retval != ERROR_OK)
-               {
-                       break;
-               }
+       assert(num_of_samples <= MAX_PROFILE_SAMPLE_NUM);
 
-               gettimeofday(&now, NULL);
-               if ((numSamples >= maxSample) || ((now.tv_sec >= timeout.tv_sec) && (now.tv_usec >= timeout.tv_usec)))
-               {
-                       command_print(cmd_ctx, "Profiling completed. %d samples.", numSamples);
-                       if ((retval = target_poll(target)) != ERROR_OK)
-                       {
-                               free(samples);
-                               return retval;
-                       }
-                       if (target->state == TARGET_HALTED)
-                       {
-                               target_resume(target, 1, 0, 0, 0); /* current pc, addr = 0, do not handle breakpoints, not debugging */
-                       }
-                       if ((retval = target_poll(target)) != ERROR_OK)
-                       {
-                               free(samples);
-                               return retval;
-                       }
-                       writeGmon(samples, numSamples, args[1]);
-                       command_print(cmd_ctx, "Wrote %s", args[1]);
-                       break;
+       retval = target_poll(target);
+       if (retval != ERROR_OK) {
+               free(samples);
+               return retval;
+       }
+       if (target->state == TARGET_RUNNING) {
+               retval = target_halt(target);
+               if (retval != ERROR_OK) {
+                       free(samples);
+                       return retval;
                }
        }
-       free(samples);
 
-       return ERROR_OK;
+       retval = target_poll(target);
+       if (retval != ERROR_OK) {
+               free(samples);
+               return retval;
+       }
+
+       uint32_t start_address = 0;
+       uint32_t end_address = 0;
+       bool with_range = false;
+       if (CMD_ARGC == 4) {
+               with_range = true;
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], start_address);
+               COMMAND_PARSE_NUMBER(u32, CMD_ARGV[3], end_address);
+       }
+
+       write_gmon(samples, num_of_samples, CMD_ARGV[1],
+                       with_range, start_address, end_address);
+       command_print(CMD_CTX, "Wrote %s", CMD_ARGV[1]);
+
+       free(samples);
+       return retval;
 }
 
-static int new_int_array_element(Jim_Interp * interp, const char *varname, int idx, uint32_t val)
+static int new_int_array_element(Jim_Interp *interp, const char *varname, int idx, uint32_t val)
 {
        char *namebuf;
        Jim_Obj *nameObjPtr, *valObjPtr;
@@ -3110,8 +3709,7 @@ static int new_int_array_element(Jim_Interp * interp, const char *varname, int i
 
        nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
        valObjPtr = Jim_NewIntObj(interp, val);
-       if (!nameObjPtr || !valObjPtr)
-       {
+       if (!nameObjPtr || !valObjPtr) {
                free(namebuf);
                return JIM_ERR;
        }
@@ -3131,20 +3729,16 @@ static int jim_mem2array(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
        struct command_context *context;
        struct target *target;
 
-       context = Jim_GetAssocData(interp, "context");
-       if (context == NULL)
-       {
-               LOG_ERROR("mem2array: no command context");
-               return JIM_ERR;
-       }
+       context = current_command_context(interp);
+       assert(context != NULL);
+
        target = get_current_target(context);
-       if (target == NULL)
-       {
+       if (target == NULL) {
                LOG_ERROR("mem2array: no current target");
                return JIM_ERR;
        }
 
-       return  target_mem2array(interp, target, argc-1, argv + 1);
+       return target_mem2array(interp, target, argc - 1, argv + 1);
 }
 
 static int target_mem2array(Jim_Interp *interp, struct target *target, int argc, Jim_Obj *const *argv)
@@ -3156,7 +3750,6 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
        uint32_t count;
        uint32_t v;
        const char *varname;
-       uint8_t buffer[4096];
        int  n, e, retval;
        uint32_t i;
 
@@ -3174,20 +3767,17 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
 
        e = Jim_GetLong(interp, argv[1], &l);
        width = l;
-       if (e != JIM_OK) {
+       if (e != JIM_OK)
                return e;
-       }
 
        e = Jim_GetLong(interp, argv[2], &l);
        addr = l;
-       if (e != JIM_OK) {
+       if (e != JIM_OK)
                return e;
-       }
        e = Jim_GetLong(interp, argv[3], &l);
        len = l;
-       if (e != JIM_OK) {
+       if (e != JIM_OK)
                return e;
-       }
        switch (width) {
                case 8:
                        width = 1;
@@ -3238,15 +3828,20 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
 
        /* index counter */
        n = 0;
+
+       size_t buffersize = 4096;
+       uint8_t *buffer = malloc(buffersize);
+       if (buffer == NULL)
+               return JIM_ERR;
+
        /* assume ok */
        e = JIM_OK;
        while (len) {
                /* Slurp... in buffer size chunks */
 
                count = len; /* in objects.. */
-               if (count > (sizeof(buffer)/width)) {
-                       count = (sizeof(buffer)/width);
-               }
+               if (count > (buffersize / width))
+                       count = (buffersize / width);
 
                retval = target_read_memory(target, addr, width, count, buffer);
                if (retval != ERROR_OK) {
@@ -3258,10 +3853,10 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: cannot read memory", NULL);
                        e = JIM_ERR;
-                       len = 0;
+                       break;
                } else {
                        v = 0; /* shut up gcc */
-                       for (i = 0 ;i < count ;i++, n++) {
+                       for (i = 0; i < count ; i++, n++) {
                                switch (width) {
                                        case 4:
                                                v = target_buffer_get_u32(target, &buffer[i*width]);
@@ -3276,15 +3871,18 @@ static int target_mem2array(Jim_Interp *interp, struct target *target, int argc,
                                new_int_array_element(interp, varname, n, v);
                        }
                        len -= count;
+                       addr += count * width;
                }
        }
 
+       free(buffer);
+
        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
 
-       return JIM_OK;
+       return e;
 }
 
-static int get_int_array_element(Jim_Interp * interp, const char *varname, int idx, uint32_t *val)
+static int get_int_array_element(Jim_Interp *interp, const char *varname, int idx, uint32_t *val)
 {
        char *namebuf;
        Jim_Obj *nameObjPtr, *valObjPtr;
@@ -3296,8 +3894,7 @@ static int get_int_array_element(Jim_Interp * interp, const char *varname, int i
                return JIM_ERR;
 
        nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
-       if (!nameObjPtr)
-       {
+       if (!nameObjPtr) {
                free(namebuf);
                return JIM_ERR;
        }
@@ -3320,20 +3917,20 @@ static int jim_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
        struct command_context *context;
        struct target *target;
 
-       context = Jim_GetAssocData(interp, "context");
-       if (context == NULL) {
-               LOG_ERROR("array2mem: no command context");
-               return JIM_ERR;
-       }
+       context = current_command_context(interp);
+       assert(context != NULL);
+
        target = get_current_target(context);
        if (target == NULL) {
                LOG_ERROR("array2mem: no current target");
                return JIM_ERR;
        }
 
-       return target_array2mem(interp,target, argc-1, argv + 1);
+       return target_array2mem(interp, target, argc-1, argv + 1);
 }
-static int target_array2mem(Jim_Interp *interp, struct target *target, int argc, Jim_Obj *const *argv)
+
+static int target_array2mem(Jim_Interp *interp, struct target *target,
+               int argc, Jim_Obj *const *argv)
 {
        long l;
        uint32_t width;
@@ -3342,7 +3939,6 @@ static int target_array2mem(Jim_Interp *interp, struct target *target, int argc,
        uint32_t count;
        uint32_t v;
        const char *varname;
-       uint8_t buffer[4096];
        int  n, e, retval;
        uint32_t i;
 
@@ -3352,7 +3948,7 @@ static int target_array2mem(Jim_Interp *interp, struct target *target, int argc,
         * argv[4] = count to write
         */
        if (argc != 4) {
-               Jim_WrongNumArgs(interp, 1, argv, "varname width addr nelems");
+               Jim_WrongNumArgs(interp, 0, argv, "varname width addr nelems");
                return JIM_ERR;
        }
        varname = Jim_GetString(argv[0], &len);
@@ -3360,20 +3956,17 @@ static int target_array2mem(Jim_Interp *interp, struct target *target, int argc,
 
        e = Jim_GetLong(interp, argv[1], &l);
        width = l;
-       if (e != JIM_OK) {
+       if (e != JIM_OK)
                return e;
-       }
 
        e = Jim_GetLong(interp, argv[2], &l);
        addr = l;
-       if (e != JIM_OK) {
+       if (e != JIM_OK)
                return e;
-       }
        e = Jim_GetLong(interp, argv[3], &l);
        len = l;
-       if (e != JIM_OK) {
+       if (e != JIM_OK)
                return e;
-       }
        switch (width) {
                case 8:
                        width = 1;
@@ -3386,23 +3979,27 @@ static int target_array2mem(Jim_Interp *interp, struct target *target, int argc,
                        break;
                default:
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-                       Jim_AppendStrings(interp, Jim_GetResult(interp), "Invalid width param, must be 8/16/32", NULL);
+                       Jim_AppendStrings(interp, Jim_GetResult(interp),
+                                       "Invalid width param, must be 8/16/32", NULL);
                        return JIM_ERR;
        }
        if (len == 0) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: zero width read?", NULL);
+               Jim_AppendStrings(interp, Jim_GetResult(interp),
+                               "array2mem: zero width read?", NULL);
                return JIM_ERR;
        }
        if ((addr + (len * width)) < addr) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: addr + len - wraps to zero?", NULL);
+               Jim_AppendStrings(interp, Jim_GetResult(interp),
+                               "array2mem: addr + len - wraps to zero?", NULL);
                return JIM_ERR;
        }
        /* absurd transfer size? */
        if (len > 65536) {
                Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-               Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: absurd > 64K item request", NULL);
+               Jim_AppendStrings(interp, Jim_GetResult(interp),
+                               "array2mem: absurd > 64K item request", NULL);
                return JIM_ERR;
        }
 
@@ -3426,23 +4023,28 @@ static int target_array2mem(Jim_Interp *interp, struct target *target, int argc,
        n = 0;
        /* assume ok */
        e = JIM_OK;
+
+       size_t buffersize = 4096;
+       uint8_t *buffer = malloc(buffersize);
+       if (buffer == NULL)
+               return JIM_ERR;
+
        while (len) {
                /* Slurp... in buffer size chunks */
 
                count = len; /* in objects.. */
-               if (count > (sizeof(buffer)/width)) {
-                       count = (sizeof(buffer)/width);
-               }
+               if (count > (buffersize / width))
+                       count = (buffersize / width);
 
                v = 0; /* shut up gcc */
-               for (i = 0 ;i < count ;i++, n++) {
+               for (i = 0; i < count; i++, n++) {
                        get_int_array_element(interp, varname, n, &v);
                        switch (width) {
                        case 4:
-                               target_buffer_set_u32(target, &buffer[i*width], v);
+                               target_buffer_set_u32(target, &buffer[i * width], v);
                                break;
                        case 2:
-                               target_buffer_set_u16(target, &buffer[i*width], v);
+                               target_buffer_set_u16(target, &buffer[i * width], v);
                                break;
                        case 1:
                                buffer[i] = v & 0x0ff;
@@ -3461,31 +4063,18 @@ static int target_array2mem(Jim_Interp *interp, struct target *target, int argc,
                        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
                        Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: cannot read memory", NULL);
                        e = JIM_ERR;
-                       len = 0;
+                       break;
                }
+               addr += count * width;
        }
 
-       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
-
-       return JIM_OK;
-}
-
-void target_all_handle_event(enum target_event e)
-{
-       struct target *target;
+       free(buffer);
 
-       LOG_DEBUG("**all*targets: event: %d, %s",
-                          (int)e,
-                          Jim_Nvp_value2name_simple(nvp_target_event, e)->name);
+       Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
 
-       target = all_targets;
-       while (target) {
-               target_handle_event(target, e);
-               target = target->next;
-       }
+       return e;
 }
 
-
 /* FIX? should we propagate errors here rather than printing them
  * and continuing?
  */
@@ -3497,19 +4086,33 @@ void target_handle_event(struct target *target, enum target_event e)
                if (teap->event == e) {
                        LOG_DEBUG("target: (%d) %s (%s) event: %d (%s) action: %s",
                                           target->target_number,
-                                          target->cmd_name,
-                                          target_get_name(target),
+                                          target_name(target),
+                                          target_type_name(target),
                                           e,
                                           Jim_Nvp_value2name_simple(nvp_target_event, e)->name,
                                           Jim_GetString(teap->body, NULL));
-                       if (Jim_EvalObj(interp, teap->body) != JIM_OK)
-                       {
-                               Jim_PrintErrorMessage(interp);
+                       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));
                        }
                }
        }
 }
 
+/**
+ * Returns true only if the target has a handler for the specified event.
+ */
+bool target_has_event_action(struct target *target, enum target_event event)
+{
+       struct target_event_action *teap;
+
+       for (teap = target->event_action; teap != NULL; teap = teap->next) {
+               if (teap->event == event)
+                       return true;
+       }
+       return false;
+}
+
 enum target_cfg_param {
        TCFG_TYPE,
        TCFG_EVENT,
@@ -3518,8 +4121,10 @@ enum target_cfg_param {
        TCFG_WORK_AREA_SIZE,
        TCFG_WORK_AREA_BACKUP,
        TCFG_ENDIAN,
-       TCFG_VARIANT,
+       TCFG_COREID,
        TCFG_CHAIN_POSITION,
+       TCFG_DBGBASE,
+       TCFG_RTOS,
 };
 
 static Jim_Nvp nvp_config_opts[] = {
@@ -3530,9 +4135,10 @@ static Jim_Nvp nvp_config_opts[] = {
        { .name = "-work-area-size",   .value = TCFG_WORK_AREA_SIZE },
        { .name = "-work-area-backup", .value = TCFG_WORK_AREA_BACKUP },
        { .name = "-endian" ,          .value = TCFG_ENDIAN },
-       { .name = "-variant",          .value = TCFG_VARIANT },
+       { .name = "-coreid",           .value = TCFG_COREID },
        { .name = "-chain-position",   .value = TCFG_CHAIN_POSITION },
-
+       { .name = "-dbgbase",          .value = TCFG_DBGBASE },
+       { .name = "-rtos",             .value = TCFG_RTOS },
        { .name = NULL, .value = -1 }
 };
 
@@ -3541,7 +4147,6 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
        Jim_Nvp *n;
        Jim_Obj *o;
        jim_wide w;
-       char *cp;
        int e;
 
        /* parse config or cget options ... */
@@ -3572,16 +4177,20 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                case TCFG_TYPE:
                        /* not setable */
                        if (goi->isconfigure) {
-                               Jim_SetResult_sprintf(goi->interp, "not setable: %s", n->name);
+                               Jim_SetResultFormatted(goi->interp,
+                                               "not settable: %s", n->name);
                                return JIM_ERR;
                        } else {
-                       no_params:
+no_params:
                                if (goi->argc != 0) {
-                                       Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "NO PARAMS");
+                                       Jim_WrongNumArgs(goi->interp,
+                                                       goi->argc, goi->argv,
+                                                       "NO PARAMS");
                                        return JIM_ERR;
                                }
                        }
-                       Jim_SetResultString(goi->interp, target_get_name(target), -1);
+                       Jim_SetResultString(goi->interp,
+                                       target_type_name(target), -1);
                        /* loop for more */
                        break;
                case TCFG_EVENT:
@@ -3614,9 +4223,8 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                                teap = target->event_action;
                                /* replace existing? */
                                while (teap) {
-                                       if (teap->event == (enum target_event)n->value) {
+                                       if (teap->event == (enum target_event)n->value)
                                                break;
-                                       }
                                        teap = teap->next;
                                }
 
@@ -3628,10 +4236,10 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                                                replace = false;
                                        }
                                        teap->event = n->value;
+                                       teap->interp = goi->interp;
                                        Jim_GetOpt_Obj(goi, &o);
-                                       if (teap->body) {
-                                               Jim_DecrRefCount(interp, teap->body);
-                                       }
+                                       if (teap->body)
+                                               Jim_DecrRefCount(teap->interp, teap->body);
                                        teap->body  = Jim_DuplicateObj(goi->interp, o);
                                        /*
                                         * FIXME:
@@ -3645,8 +4253,7 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                                         */
                                        Jim_IncrRefCount(teap->body);
 
-                                       if (!replace)
-                                       {
+                                       if (!replace) {
                                                /* add to head of event list */
                                                teap->next = target->event_action;
                                                target->event_action = teap;
@@ -3654,11 +4261,10 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                                        Jim_SetEmptyResult(goi->interp);
                                } else {
                                        /* get */
-                                       if (teap == NULL) {
+                                       if (teap == NULL)
                                                Jim_SetEmptyResult(goi->interp);
-                                       } else {
+                                       else
                                                Jim_SetResult(goi->interp, Jim_DuplicateObj(goi->interp, teap->body));
-                                       }
                                }
                        }
                        /* loop for more */
@@ -3668,17 +4274,15 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                        if (goi->isconfigure) {
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Wide(goi, &w);
-                               if (e != JIM_OK) {
+                               if (e != JIM_OK)
                                        return e;
-                               }
                                target->working_area_virt = w;
                                target->working_area_virt_spec = true;
                        } else {
-                               if (goi->argc != 0) {
+                               if (goi->argc != 0)
                                        goto no_params;
-                               }
                        }
-                       Jim_SetResult(interp, Jim_NewIntObj(goi->interp, target->working_area_virt));
+                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->working_area_virt));
                        /* loop for more */
                        break;
 
@@ -3686,17 +4290,15 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                        if (goi->isconfigure) {
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Wide(goi, &w);
-                               if (e != JIM_OK) {
+                               if (e != JIM_OK)
                                        return e;
-                               }
                                target->working_area_phys = w;
                                target->working_area_phys_spec = true;
                        } else {
-                               if (goi->argc != 0) {
+                               if (goi->argc != 0)
                                        goto no_params;
-                               }
                        }
-                       Jim_SetResult(interp, Jim_NewIntObj(goi->interp, target->working_area_phys));
+                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->working_area_phys));
                        /* loop for more */
                        break;
 
@@ -3704,16 +4306,14 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                        if (goi->isconfigure) {
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Wide(goi, &w);
-                               if (e != JIM_OK) {
+                               if (e != JIM_OK)
                                        return e;
-                               }
                                target->working_area_size = w;
                        } else {
-                               if (goi->argc != 0) {
+                               if (goi->argc != 0)
                                        goto no_params;
-                               }
                        }
-                       Jim_SetResult(interp, Jim_NewIntObj(goi->interp, target->working_area_size));
+                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->working_area_size));
                        /* loop for more */
                        break;
 
@@ -3721,20 +4321,19 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                        if (goi->isconfigure) {
                                target_free_all_working_areas(target);
                                e = Jim_GetOpt_Wide(goi, &w);
-                               if (e != JIM_OK) {
+                               if (e != JIM_OK)
                                        return e;
-                               }
                                /* make this exactly 1 or 0 */
                                target->backup_working_area = (!!w);
                        } else {
-                               if (goi->argc != 0) {
+                               if (goi->argc != 0)
                                        goto no_params;
-                               }
                        }
-                       Jim_SetResult(interp, Jim_NewIntObj(goi->interp, target->backup_working_area));
+                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->backup_working_area));
                        /* loop for more e*/
                        break;
 
+
                case TCFG_ENDIAN:
                        if (goi->isconfigure) {
                                e = Jim_GetOpt_Nvp(goi, nvp_target_endian, &n);
@@ -3744,9 +4343,8 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                                }
                                target->endianness = n->value;
                        } else {
-                               if (goi->argc != 0) {
+                               if (goi->argc != 0)
                                        goto no_params;
-                               }
                        }
                        n = Jim_Nvp_value2name_simple(nvp_target_endian, target->endianness);
                        if (n->name == NULL) {
@@ -3757,50 +4355,64 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
                        /* loop for more */
                        break;
 
-               case TCFG_VARIANT:
+               case TCFG_COREID:
                        if (goi->isconfigure) {
-                               if (goi->argc < 1) {
-                                       Jim_SetResult_sprintf(goi->interp,
-                                                                                  "%s ?STRING?",
-                                                                                  n->name);
-                                       return JIM_ERR;
-                               }
-                               if (target->variant) {
-                                       free((void *)(target->variant));
-                               }
-                               e = Jim_GetOpt_String(goi, &cp, NULL);
-                               target->variant = strdup(cp);
+                               e = Jim_GetOpt_Wide(goi, &w);
+                               if (e != JIM_OK)
+                                       return e;
+                               target->coreid = (int32_t)w;
                        } else {
-                               if (goi->argc != 0) {
+                               if (goi->argc != 0)
                                        goto no_params;
-                               }
                        }
-                       Jim_SetResultString(goi->interp, target->variant,-1);
+                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->working_area_size));
                        /* loop for more */
                        break;
+
                case TCFG_CHAIN_POSITION:
                        if (goi->isconfigure) {
-                               Jim_Obj *o;
+                               Jim_Obj *o_t;
                                struct jtag_tap *tap;
                                target_free_all_working_areas(target);
-                               e = Jim_GetOpt_Obj(goi, &o);
-                               if (e != JIM_OK) {
+                               e = Jim_GetOpt_Obj(goi, &o_t);
+                               if (e != JIM_OK)
                                        return e;
-                               }
-                               tap = jtag_tap_by_jim_obj(goi->interp, o);
-                               if (tap == NULL) {
+                               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;
                        } else {
-                               if (goi->argc != 0) {
+                               if (goi->argc != 0)
                                        goto no_params;
-                               }
                        }
-                       Jim_SetResultString(interp, target->tap->dotted_name, -1);
+                       Jim_SetResultString(goi->interp, target->tap->dotted_name, -1);
                        /* loop for more e*/
                        break;
+               case TCFG_DBGBASE:
+                       if (goi->isconfigure) {
+                               e = Jim_GetOpt_Wide(goi, &w);
+                               if (e != JIM_OK)
+                                       return e;
+                               target->dbgbase = (uint32_t)w;
+                               target->dbgbase_set = true;
+                       } else {
+                               if (goi->argc != 0)
+                                       goto no_params;
+                       }
+                       Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->dbgbase));
+                       /* loop for more */
+                       break;
+
+               case TCFG_RTOS:
+                       /* RTOS */
+                       {
+                               int result = rtos_create(goi, target);
+                               if (result != JIM_OK)
+                                       return result;
+                       }
+                       /* loop for more */
+                       break;
                }
        } /* while (goi->argc) */
 
@@ -3809,422 +4421,603 @@ static int target_configure(Jim_GetOptInfo *goi, struct target *target)
        return JIM_OK;
 }
 
-/** this is the 'tcl' handler for the target specific command */
-static int tcl_target_func(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+static int jim_target_configure(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
 {
        Jim_GetOptInfo goi;
-       jim_wide a,b,c;
-       int x,y,z;
-       uint8_t  target_buf[32];
-       Jim_Nvp *n;
-       struct target *target;
-       struct command_context *cmd_ctx;
-       int e;
 
-       enum {
-               TS_CMD_CONFIGURE,
-               TS_CMD_CGET,
-
-               TS_CMD_MWW, TS_CMD_MWH, TS_CMD_MWB,
-               TS_CMD_MDW, TS_CMD_MDH, TS_CMD_MDB,
-               TS_CMD_MRW, TS_CMD_MRH, TS_CMD_MRB,
-               TS_CMD_MEM2ARRAY, TS_CMD_ARRAY2MEM,
-               TS_CMD_EXAMINE,
-               TS_CMD_POLL,
-               TS_CMD_RESET,
-               TS_CMD_HALT,
-               TS_CMD_WAITSTATE,
-               TS_CMD_EVENTLIST,
-               TS_CMD_CURSTATE,
-               TS_CMD_INVOKE_EVENT,
-       };
+       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+       goi.isconfigure = !strcmp(Jim_GetString(argv[0], NULL), "configure");
+       int need_args = 1 + goi.isconfigure;
+       if (goi.argc < need_args) {
+               Jim_WrongNumArgs(goi.interp, goi.argc, goi.argv,
+                       goi.isconfigure
+                               ? "missing: -option VALUE ..."
+                               : "missing: -option ...");
+               return JIM_ERR;
+       }
+       struct target *target = Jim_CmdPrivData(goi.interp);
+       return target_configure(&goi, target);
+}
 
-       static const Jim_Nvp target_options[] = {
-               { .name = "configure", .value = TS_CMD_CONFIGURE },
-               { .name = "cget", .value = TS_CMD_CGET },
-               { .name = "mww", .value = TS_CMD_MWW },
-               { .name = "mwh", .value = TS_CMD_MWH },
-               { .name = "mwb", .value = TS_CMD_MWB },
-               { .name = "mdw", .value = TS_CMD_MDW },
-               { .name = "mdh", .value = TS_CMD_MDH },
-               { .name = "mdb", .value = TS_CMD_MDB },
-               { .name = "mem2array", .value = TS_CMD_MEM2ARRAY },
-               { .name = "array2mem", .value = TS_CMD_ARRAY2MEM },
-               { .name = "eventlist", .value = TS_CMD_EVENTLIST },
-               { .name = "curstate",  .value = TS_CMD_CURSTATE },
-
-               { .name = "arp_examine", .value = TS_CMD_EXAMINE },
-               { .name = "arp_poll", .value = TS_CMD_POLL },
-               { .name = "arp_reset", .value = TS_CMD_RESET },
-               { .name = "arp_halt", .value = TS_CMD_HALT },
-               { .name = "arp_waitstate", .value = TS_CMD_WAITSTATE },
-               { .name = "invoke-event", .value = TS_CMD_INVOKE_EVENT },
-
-               { .name = NULL, .value = -1 },
-       };
+static int jim_target_mw(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       const char *cmd_name = Jim_GetString(argv[0], NULL);
 
-       /* go past the "command" */
-       Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
+       Jim_GetOptInfo goi;
+       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
 
-       target = Jim_CmdPrivData(goi.interp);
-       cmd_ctx = Jim_GetAssocData(goi.interp, "context");
+       if (goi.argc < 2 || goi.argc > 4) {
+               Jim_SetResultFormatted(goi.interp,
+                               "usage: %s [phys] <address> <data> [<count>]", cmd_name);
+               return JIM_ERR;
+       }
 
-       /* commands here are in an NVP table */
-       e = Jim_GetOpt_Nvp(&goi, target_options, &n);
-       if (e != JIM_OK) {
-               Jim_GetOpt_NvpUnknown(&goi, target_options, 0);
+       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;
        }
-       /* Assume blank result */
-       Jim_SetEmptyResult(goi.interp);
 
-       switch (n->value) {
-       case TS_CMD_CONFIGURE:
-               if (goi.argc < 2) {
-                       Jim_WrongNumArgs(goi.interp, goi.argc, goi.argv, "missing: -option VALUE ...");
-                       return JIM_ERR;
-               }
-               goi.isconfigure = 1;
-               return target_configure(&goi, target);
-       case TS_CMD_CGET:
-               // some things take params
-               if (goi.argc < 1) {
-                       Jim_WrongNumArgs(goi.interp, 0, goi.argv, "missing: ?-option?");
-                       return JIM_ERR;
-               }
-               goi.isconfigure = 0;
-               return target_configure(&goi, target);
-               break;
-       case TS_CMD_MWW:
-       case TS_CMD_MWH:
-       case TS_CMD_MWB:
-               /* argv[0] = cmd
-                * argv[1] = address
-                * argv[2] = data
-                * argv[3] = optional count.
-                */
+       /* all args must be consumed */
+       if (goi.argc != 0)
+               return JIM_ERR;
 
-               if ((goi.argc == 2) || (goi.argc == 3)) {
-                       /* all is well */
-               } else {
-               mwx_error:
-                       Jim_SetResult_sprintf(goi.interp, "expected: %s ADDR DATA [COUNT]", n->name);
-                       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;
+       }
 
-               e = Jim_GetOpt_Wide(&goi, &a);
-               if (e != JIM_OK) {
-                       goto mwx_error;
-               }
+       return (target_fill_mem(target, a, fn, data_size, b, c) == ERROR_OK) ? JIM_OK : JIM_ERR;
+}
 
-               e = Jim_GetOpt_Wide(&goi, &b);
-               if (e != JIM_OK) {
-                       goto mwx_error;
-               }
-               if (goi.argc == 3) {
-                       e = Jim_GetOpt_Wide(&goi, &c);
-                       if (e != JIM_OK) {
-                               goto mwx_error;
-                       }
-               } else {
-                       c = 1;
-               }
+/**
+*  @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);
 
-               switch (n->value) {
-               case TS_CMD_MWW:
-                       target_buffer_set_u32(target, target_buf, b);
-                       b = 4;
-                       break;
-               case TS_CMD_MWH:
-                       target_buffer_set_u16(target, target_buf, b);
-                       b = 2;
-                       break;
-               case TS_CMD_MWB:
-                       target_buffer_set_u8(target, target_buf, b);
-                       b = 1;
-                       break;
-               }
-               for (x = 0 ; x < c ; x++) {
-                       e = target_write_memory(target, a, b, 1, target_buf);
-                       if (e != ERROR_OK) {
-                               Jim_SetResult_sprintf(interp, "Error writing @ 0x%08x: %d\n", (int)(a), e);
-                               return JIM_ERR;
-                       }
-                       /* b = width */
-                       a = a + b;
-               }
-               return JIM_OK;
-               break;
+       Jim_GetOptInfo goi;
+       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
 
-               /* display */
-       case TS_CMD_MDW:
-       case TS_CMD_MDH:
-       case TS_CMD_MDB:
-               /* argv[0] = command
-                * argv[1] = address
-                * argv[2] = optional count
-                */
-               if ((goi.argc == 2) || (goi.argc == 3)) {
-                       Jim_SetResult_sprintf(goi.interp, "expected: %s ADDR [COUNT]", n->name);
-                       return JIM_ERR;
-               }
-               e = Jim_GetOpt_Wide(&goi, &a);
-               if (e != JIM_OK) {
-                       return JIM_ERR;
-               }
-               if (goi.argc) {
-                       e = Jim_GetOpt_Wide(&goi, &c);
-                       if (e != JIM_OK) {
-                               return JIM_ERR;
-                       }
-               } else {
-                       c = 1;
-               }
-               b = 1; /* shut up gcc */
-               switch (n->value) {
-               case TS_CMD_MDW:
-                       b =  4;
-                       break;
-               case TS_CMD_MDH:
-                       b = 2;
-                       break;
-               case TS_CMD_MDB:
-                       b = 1;
-                       break;
-               }
+       if ((goi.argc < 1) || (goi.argc > 3)) {
+               Jim_SetResultFormatted(goi.interp,
+                               "usage: %s [phys] <address> [<count>]", cmd_name);
+               return JIM_ERR;
+       }
 
-               /* convert to "bytes" */
-               c = c * b;
-               /* count is now in 'BYTES' */
-               while (c > 0) {
-                       y = c;
-                       if (y > 16) {
-                               y = 16;
-                       }
-                       e = target_read_memory(target, a, b, y / b, target_buf);
-                       if (e != ERROR_OK) {
-                               Jim_SetResult_sprintf(interp, "error reading target @ 0x%08lx", (int)(a));
-                               return JIM_ERR;
-                       }
+       int (*fn)(struct target *target,
+                       uint32_t address, uint32_t size, uint32_t count, uint8_t *buffer);
+       fn = target_read_memory;
 
-                       Jim_fprintf(interp, interp->cookie_stdout, "0x%08x ", (int)(a));
-                       switch (b) {
-                       case 4:
-                               for (x = 0 ; (x < 16) && (x < y) ; x += 4) {
-                                       z = target_buffer_get_u32(target, &(target_buf[ x * 4 ]));
-                                       Jim_fprintf(interp, interp->cookie_stdout, "%08x ", (int)(z));
-                               }
-                               for (; (x < 16) ; x += 4) {
-                                       Jim_fprintf(interp, interp->cookie_stdout, "         ");
-                               }
-                               break;
-                       case 2:
-                               for (x = 0 ; (x < 16) && (x < y) ; x += 2) {
-                                       z = target_buffer_get_u16(target, &(target_buf[ x * 2 ]));
-                                       Jim_fprintf(interp, interp->cookie_stdout, "%04x ", (int)(z));
-                               }
-                               for (; (x < 16) ; x += 2) {
-                                       Jim_fprintf(interp, interp->cookie_stdout, "     ");
-                               }
-                               break;
-                       case 1:
-                       default:
-                               for (x = 0 ; (x < 16) && (x < y) ; x += 1) {
-                                       z = target_buffer_get_u8(target, &(target_buf[ x * 4 ]));
-                                       Jim_fprintf(interp, interp->cookie_stdout, "%02x ", (int)(z));
-                               }
-                               for (; (x < 16) ; x += 1) {
-                                       Jim_fprintf(interp, interp->cookie_stdout, "   ");
-                               }
-                               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 */
-                       Jim_fprintf(interp, interp->cookie_stdout, "%s\n", target_buf);
-                       /* NEXT... */
-                       c -= 16;
-                       a += 16;
-               }
-               return JIM_OK;
-       case TS_CMD_MEM2ARRAY:
-               return target_mem2array(goi.interp, target, goi.argc, goi.argv);
-               break;
-       case TS_CMD_ARRAY2MEM:
-               return target_array2mem(goi.interp, target, goi.argc, goi.argv);
-               break;
-       case TS_CMD_EXAMINE:
-               if (goi.argc) {
-                       Jim_WrongNumArgs(goi.interp, 2, argv, "[no parameters]");
-                       return JIM_ERR;
-               }
-               if (!target->tap->enabled)
-                       goto err_tap_disabled;
-               e = target->type->examine(target);
-               if (e != ERROR_OK) {
-                       Jim_SetResult_sprintf(interp, "examine-fails: %d", e);
-                       return JIM_ERR;
-               }
-               return JIM_OK;
-       case TS_CMD_POLL:
-               if (goi.argc) {
-                       Jim_WrongNumArgs(goi.interp, 2, argv, "[no parameters]");
-                       return JIM_ERR;
-               }
-               if (!target->tap->enabled)
-                       goto err_tap_disabled;
-               if (!(target_was_examined(target))) {
-                       e = ERROR_TARGET_NOT_EXAMINED;
-               } else {
-                       e = target->type->poll(target);
-               }
-               if (e != ERROR_OK) {
-                       Jim_SetResult_sprintf(interp, "poll-fails: %d", e);
-                       return JIM_ERR;
-               } else {
-                       return JIM_OK;
-               }
-               break;
-       case TS_CMD_RESET:
-               if (goi.argc != 2) {
-                       Jim_WrongNumArgs(interp, 2, argv,
-                                       "([tT]|[fF]|assert|deassert) BOOL");
-                       return JIM_ERR;
-               }
-               e = Jim_GetOpt_Nvp(&goi, nvp_assert, &n);
-               if (e != JIM_OK) {
-                       Jim_GetOpt_NvpUnknown(&goi, nvp_assert, 1);
-                       return e;
-               }
-               /* the halt or not param */
-               e = Jim_GetOpt_Wide(&goi, &a);
-               if (e != JIM_OK) {
+       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;
-               }
-               if (!target->tap->enabled)
-                       goto err_tap_disabled;
-               if (!target->type->assert_reset
-                               || !target->type->deassert_reset) {
-                       Jim_SetResult_sprintf(interp,
-                                       "No target-specific reset for %s",
-                                       target->cmd_name);
-                       return JIM_ERR;
-               }
-               /* determine if we should halt or not. */
-               target->reset_halt = !!a;
-               /* When this happens - all workareas are invalid. */
-               target_free_all_working_areas_restore(target, 0);
-
-               /* do the assert */
-               if (n->value == NVP_ASSERT) {
-                       e = target->type->assert_reset(target);
-               } else {
-                       e = target->type->deassert_reset(target);
-               }
-               return (e == ERROR_OK) ? JIM_OK : JIM_ERR;
-       case TS_CMD_HALT:
-               if (goi.argc) {
-                       Jim_WrongNumArgs(goi.interp, 0, argv, "halt [no parameters]");
-                       return JIM_ERR;
-               }
-               if (!target->tap->enabled)
-                       goto err_tap_disabled;
-               e = target->type->halt(target);
-               return (e == ERROR_OK) ? JIM_OK : JIM_ERR;
-       case TS_CMD_WAITSTATE:
-               /* params:  <name>  statename timeoutmsecs */
-               if (goi.argc != 2) {
-                       Jim_SetResult_sprintf(goi.interp, "%s STATENAME TIMEOUTMSECS", n->name);
+
+               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;
-               }
-               e = Jim_GetOpt_Nvp(&goi, nvp_target_state, &n);
-               if (e != JIM_OK) {
-                       Jim_GetOpt_NvpUnknown(&goi, nvp_target_state,1);
-                       return e;
-               }
-               e = Jim_GetOpt_Wide(&goi, &a);
-               if (e != JIM_OK) {
-                       return e;
-               }
-               if (!target->tap->enabled)
-                       goto err_tap_disabled;
-               e = target_wait_state(target, n->value, a);
+       } 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_SetResult_sprintf(goi.interp,
-                                                                  "target: %s wait %s fails (%d) %s",
-                                                                  target->cmd_name,
-                                                                  n->name,
-                                                                  e, target_strerror_safe(e));
+                       Jim_SetResultFormatted(interp, "error reading target @ 0x%08lx", (long)addr);
                        return JIM_ERR;
-               } else {
-                       return JIM_OK;
                }
-       case TS_CMD_EVENTLIST:
-               /* List for human, Events defined for this target.
-                * scripts/programs should use 'name cget -event NAME'
-                */
-               {
-                       struct target_event_action *teap;
-                       teap = target->event_action;
-                       command_print(cmd_ctx, "Event actions for target (%d) %s\n",
-                                                  target->target_number,
-                                                  target->cmd_name);
-                       command_print(cmd_ctx, "%-25s | Body", "Event");
-                       command_print(cmd_ctx, "------------------------- | ----------------------------------------");
-                       while (teap) {
-                               command_print(cmd_ctx,
-                                                          "%-25s | %s",
-                                                          Jim_Nvp_value2name_simple(nvp_target_event, teap->event)->name,
-                                                          Jim_GetString(teap->body, NULL));
-                               teap = teap->next;
+
+               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));
                        }
-                       command_print(cmd_ctx, "***END***");
-                       return JIM_OK;
-               }
-       case TS_CMD_CURSTATE:
-               if (goi.argc != 0) {
-                       Jim_WrongNumArgs(goi.interp, 0, argv, "[no parameters]");
-                       return JIM_ERR;
+                       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;
                }
-               Jim_SetResultString(goi.interp,
-                                                       target_state_name( target ),
-                                                       -1);
-               return JIM_OK;
-       case TS_CMD_INVOKE_EVENT:
-               if (goi.argc != 1) {
-                       Jim_SetResult_sprintf(goi.interp, "%s ?EVENTNAME?",n->name);
-                       return JIM_ERR;
+               /* 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] = '.';
+                       }
                }
-               e = Jim_GetOpt_Nvp(&goi, nvp_target_event, &n);
-               if (e != JIM_OK) {
-                       Jim_GetOpt_NvpUnknown(&goi, nvp_target_event, 1);
-                       return e;
+               /* space pad  */
+               while (x < 16) {
+                       target_buf[x] = ' ';
+                       x++;
                }
-               target_handle_event(target, n->value);
-               return JIM_OK;
+               /* terminate */
+               target_buf[16] = 0;
+               /* print - with a newline */
+               command_print_sameline(NULL, "%s\n", target_buf);
+               /* NEXT... */
+               bytes -= 16;
+               addr += 16;
        }
-       return JIM_ERR;
+       return JIM_OK;
+}
+
+static int jim_target_mem2array(Jim_Interp *interp,
+               int argc, Jim_Obj *const *argv)
+{
+       struct target *target = Jim_CmdPrivData(interp);
+       return target_mem2array(interp, target, argc - 1, argv + 1);
+}
 
-err_tap_disabled:
-       Jim_SetResult_sprintf(interp, "[TAP is disabled]");
+static int jim_target_array2mem(Jim_Interp *interp,
+               int argc, Jim_Obj *const *argv)
+{
+       struct target *target = Jim_CmdPrivData(interp);
+       return target_array2mem(interp, target, argc - 1, argv + 1);
+}
+
+static int jim_target_tap_disabled(Jim_Interp *interp)
+{
+       Jim_SetResultFormatted(interp, "[TAP is disabled]");
        return JIM_ERR;
 }
 
+static int jim_target_examine(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       if (argc != 1) {
+               Jim_WrongNumArgs(interp, 1, argv, "[no parameters]");
+               return JIM_ERR;
+       }
+       struct target *target = Jim_CmdPrivData(interp);
+       if (!target->tap->enabled)
+               return jim_target_tap_disabled(interp);
+
+       int e = target->type->examine(target);
+       if (e != ERROR_OK)
+               return JIM_ERR;
+       return JIM_OK;
+}
+
+static int jim_target_halt_gdb(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       if (argc != 1) {
+               Jim_WrongNumArgs(interp, 1, argv, "[no parameters]");
+               return JIM_ERR;
+       }
+       struct target *target = Jim_CmdPrivData(interp);
+
+       if (target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT) != ERROR_OK)
+               return JIM_ERR;
+
+       return JIM_OK;
+}
+
+static int jim_target_poll(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       if (argc != 1) {
+               Jim_WrongNumArgs(interp, 1, argv, "[no parameters]");
+               return JIM_ERR;
+       }
+       struct target *target = Jim_CmdPrivData(interp);
+       if (!target->tap->enabled)
+               return jim_target_tap_disabled(interp);
+
+       int e;
+       if (!(target_was_examined(target)))
+               e = ERROR_TARGET_NOT_EXAMINED;
+       else
+               e = target->type->poll(target);
+       if (e != ERROR_OK)
+               return JIM_ERR;
+       return JIM_OK;
+}
+
+static int jim_target_reset(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       Jim_GetOptInfo goi;
+       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+
+       if (goi.argc != 2) {
+               Jim_WrongNumArgs(interp, 0, argv,
+                               "([tT]|[fF]|assert|deassert) BOOL");
+               return JIM_ERR;
+       }
+
+       Jim_Nvp *n;
+       int e = Jim_GetOpt_Nvp(&goi, nvp_assert, &n);
+       if (e != JIM_OK) {
+               Jim_GetOpt_NvpUnknown(&goi, nvp_assert, 1);
+               return e;
+       }
+       /* the halt or not param */
+       jim_wide a;
+       e = Jim_GetOpt_Wide(&goi, &a);
+       if (e != JIM_OK)
+               return e;
+
+       struct target *target = Jim_CmdPrivData(goi.interp);
+       if (!target->tap->enabled)
+               return jim_target_tap_disabled(interp);
+       if (!(target_was_examined(target))) {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_TARGET_NOT_EXAMINED;
+       }
+       if (!target->type->assert_reset || !target->type->deassert_reset) {
+               Jim_SetResultFormatted(interp,
+                               "No target-specific reset for %s",
+                               target_name(target));
+               return JIM_ERR;
+       }
+       /* determine if we should halt or not. */
+       target->reset_halt = !!a;
+       /* When this happens - all workareas are invalid. */
+       target_free_all_working_areas_restore(target, 0);
+
+       /* do the assert */
+       if (n->value == NVP_ASSERT)
+               e = target->type->assert_reset(target);
+       else
+               e = target->type->deassert_reset(target);
+       return (e == ERROR_OK) ? JIM_OK : JIM_ERR;
+}
+
+static int jim_target_halt(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       if (argc != 1) {
+               Jim_WrongNumArgs(interp, 1, argv, "[no parameters]");
+               return JIM_ERR;
+       }
+       struct target *target = Jim_CmdPrivData(interp);
+       if (!target->tap->enabled)
+               return jim_target_tap_disabled(interp);
+       int e = target->type->halt(target);
+       return (e == ERROR_OK) ? JIM_OK : JIM_ERR;
+}
+
+static int jim_target_wait_state(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       Jim_GetOptInfo goi;
+       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+
+       /* params:  <name>  statename timeoutmsecs */
+       if (goi.argc != 2) {
+               const char *cmd_name = Jim_GetString(argv[0], NULL);
+               Jim_SetResultFormatted(goi.interp,
+                               "%s <state_name> <timeout_in_msec>", cmd_name);
+               return JIM_ERR;
+       }
+
+       Jim_Nvp *n;
+       int e = Jim_GetOpt_Nvp(&goi, nvp_target_state, &n);
+       if (e != JIM_OK) {
+               Jim_GetOpt_NvpUnknown(&goi, nvp_target_state, 1);
+               return e;
+       }
+       jim_wide a;
+       e = Jim_GetOpt_Wide(&goi, &a);
+       if (e != JIM_OK)
+               return e;
+       struct target *target = Jim_CmdPrivData(interp);
+       if (!target->tap->enabled)
+               return jim_target_tap_disabled(interp);
+
+       e = target_wait_state(target, n->value, a);
+       if (e != ERROR_OK) {
+               Jim_Obj *eObj = Jim_NewIntObj(interp, e);
+               Jim_SetResultFormatted(goi.interp,
+                               "target: %s wait %s fails (%#s) %s",
+                               target_name(target), n->name,
+                               eObj, target_strerror_safe(e));
+               Jim_FreeNewObj(interp, eObj);
+               return JIM_ERR;
+       }
+       return JIM_OK;
+}
+/* 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)
+{
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx != NULL);
+
+       struct target *target = Jim_CmdPrivData(interp);
+       struct target_event_action *teap = target->event_action;
+       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, "------------------------- | "
+                       "----------------------------------------");
+       while (teap) {
+               Jim_Nvp *opt = Jim_Nvp_value2name_simple(nvp_target_event, teap->event);
+               command_print(cmd_ctx, "%-25s | %s",
+                               opt->name, Jim_GetString(teap->body, NULL));
+               teap = teap->next;
+       }
+       command_print(cmd_ctx, "***END***");
+       return JIM_OK;
+}
+static int jim_target_current_state(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       if (argc != 1) {
+               Jim_WrongNumArgs(interp, 1, argv, "[no parameters]");
+               return JIM_ERR;
+       }
+       struct target *target = Jim_CmdPrivData(interp);
+       Jim_SetResultString(interp, target_state_name(target), -1);
+       return JIM_OK;
+}
+static int jim_target_invoke_event(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       Jim_GetOptInfo goi;
+       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+       if (goi.argc != 1) {
+               const char *cmd_name = Jim_GetString(argv[0], NULL);
+               Jim_SetResultFormatted(goi.interp, "%s <eventname>", cmd_name);
+               return JIM_ERR;
+       }
+       Jim_Nvp *n;
+       int e = Jim_GetOpt_Nvp(&goi, nvp_target_event, &n);
+       if (e != JIM_OK) {
+               Jim_GetOpt_NvpUnknown(&goi, nvp_target_event, 1);
+               return e;
+       }
+       struct target *target = Jim_CmdPrivData(interp);
+       target_handle_event(target, n->value);
+       return JIM_OK;
+}
+
+static const struct command_registration target_instance_command_handlers[] = {
+       {
+               .name = "configure",
+               .mode = COMMAND_CONFIG,
+               .jim_handler = jim_target_configure,
+               .help  = "configure a new target for use",
+               .usage = "[target_attribute ...]",
+       },
+       {
+               .name = "cget",
+               .mode = COMMAND_ANY,
+               .jim_handler = jim_target_configure,
+               .help  = "returns the specified target attribute",
+               .usage = "target_attribute",
+       },
+       {
+               .name = "mww",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_mw,
+               .help = "Write 32-bit word(s) to target memory",
+               .usage = "address data [count]",
+       },
+       {
+               .name = "mwh",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_mw,
+               .help = "Write 16-bit half-word(s) to target memory",
+               .usage = "address data [count]",
+       },
+       {
+               .name = "mwb",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_mw,
+               .help = "Write byte(s) to target memory",
+               .usage = "address data [count]",
+       },
+       {
+               .name = "mdw",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_md,
+               .help = "Display target memory as 32-bit words",
+               .usage = "address [count]",
+       },
+       {
+               .name = "mdh",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_md,
+               .help = "Display target memory as 16-bit half-words",
+               .usage = "address [count]",
+       },
+       {
+               .name = "mdb",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_md,
+               .help = "Display target memory as 8-bit bytes",
+               .usage = "address [count]",
+       },
+       {
+               .name = "array2mem",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_array2mem,
+               .help = "Writes Tcl array of 8/16/32 bit numbers "
+                       "to target memory",
+               .usage = "arrayname bitwidth address count",
+       },
+       {
+               .name = "mem2array",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_mem2array,
+               .help = "Loads Tcl array of 8/16/32 bit numbers "
+                       "from target memory",
+               .usage = "arrayname bitwidth address count",
+       },
+       {
+               .name = "eventlist",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_event_list,
+               .help = "displays a table of events defined for this target",
+       },
+       {
+               .name = "curstate",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_current_state,
+               .help = "displays the current state of this target",
+       },
+       {
+               .name = "arp_examine",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_examine,
+               .help = "used internally for reset processing",
+       },
+       {
+               .name = "arp_halt_gdb",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_halt_gdb,
+               .help = "used internally for reset processing to halt GDB",
+       },
+       {
+               .name = "arp_poll",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_poll,
+               .help = "used internally for reset processing",
+       },
+       {
+               .name = "arp_reset",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_reset,
+               .help = "used internally for reset processing",
+       },
+       {
+               .name = "arp_halt",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_halt,
+               .help = "used internally for reset processing",
+       },
+       {
+               .name = "arp_waitstate",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_wait_state,
+               .help = "used internally for reset processing",
+       },
+       {
+               .name = "invoke-event",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_target_invoke_event,
+               .help = "invoke handler for specified event",
+               .usage = "event_name",
+       },
+       COMMAND_REGISTRATION_DONE
+};
+
 static int target_create(Jim_GetOptInfo *goi)
 {
        Jim_Obj *new_cmd;
@@ -4236,7 +5029,9 @@ static int target_create(Jim_GetOptInfo *goi)
        struct target *target;
        struct command_context *cmd_ctx;
 
-       cmd_ctx = Jim_GetAssocData(goi->interp, "context");
+       cmd_ctx = current_command_context(goi->interp);
+       assert(cmd_ctx != NULL);
+
        if (goi->argc < 3) {
                Jim_WrongNumArgs(goi->interp, 1, goi->argv, "?name? ?type? ..options...");
                return JIM_ERR;
@@ -4248,22 +5043,42 @@ static int target_create(Jim_GetOptInfo *goi)
        cmd = Jim_GetCommand(goi->interp, new_cmd, JIM_ERRMSG);
        if (cmd) {
                cp = Jim_GetString(new_cmd, NULL);
-               Jim_SetResult_sprintf(goi->interp, "Command/target: %s Exists", cp);
+               Jim_SetResultFormatted(goi->interp, "Command/target: %s Exists", cp);
                return JIM_ERR;
        }
 
        /* TYPE */
        e = Jim_GetOpt_String(goi, &cp2, NULL);
+       if (e != JIM_OK)
+               return e;
        cp = cp2;
+       struct transport *tr = get_current_transport();
+       if (tr->override_target) {
+               e = tr->override_target(&cp);
+               if (e != ERROR_OK) {
+                       LOG_ERROR("The selected transport doesn't support this target");
+                       return JIM_ERR;
+               }
+               LOG_INFO("The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD");
+       }
        /* now does target type exist */
        for (x = 0 ; target_types[x] ; x++) {
                if (0 == strcmp(cp, target_types[x]->name)) {
                        /* found */
                        break;
                }
+
+               /* check for deprecated name */
+               if (target_types[x]->deprecated_name) {
+                       if (0 == strcmp(cp, target_types[x]->deprecated_name)) {
+                               /* found */
+                               LOG_WARNING("target name is deprecated use: \'%s\'", target_types[x]->name);
+                               break;
+                       }
+               }
        }
        if (target_types[x] == NULL) {
-               Jim_SetResult_sprintf(goi->interp, "Unknown target type %s, try one of ", cp);
+               Jim_SetResultFormatted(goi->interp, "Unknown target type %s, try one of ", cp);
                for (x = 0 ; target_types[x] ; x++) {
                        if (target_types[x + 1]) {
                                Jim_AppendStrings(goi->interp,
@@ -4274,25 +5089,29 @@ static int target_create(Jim_GetOptInfo *goi)
                                Jim_AppendStrings(goi->interp,
                                                                   Jim_GetResult(goi->interp),
                                                                   " or ",
-                                                                  target_types[x]->name,NULL);
+                                                                  target_types[x]->name, NULL);
                        }
                }
                return JIM_ERR;
        }
 
        /* Create it */
-       target = calloc(1,sizeof(struct target));
+       target = calloc(1, sizeof(struct target));
        /* set target number */
        target->target_number = new_target_number();
+       cmd_ctx->current_target = target->target_number;
 
        /* allocate memory for each unique target type */
-       target->type = (struct target_type*)calloc(1,sizeof(struct target_type));
+       target->type = calloc(1, sizeof(struct target_type));
 
        memcpy(target->type, target_types[x], sizeof(struct target_type));
 
        /* will be set by "-endian" */
        target->endianness = TARGET_ENDIAN_UNKNOWN;
 
+       /* default to first core, override with -coreid */
+       target->coreid = 0;
+
        target->working_area        = 0x0;
        target->working_area_size   = 0x0;
        target->working_areas       = NULL;
@@ -4325,13 +5144,15 @@ static int target_create(Jim_GetOptInfo *goi)
 
        target->endianness = TARGET_ENDIAN_UNKNOWN;
 
+       target->rtos = NULL;
+       target->rtos_auto_detect = false;
+
        /* Do the rest as "configure" options */
        goi->isconfigure = 1;
        e = target_configure(goi, target);
 
-       if (target->tap == NULL)
-       {
-               Jim_SetResultString(interp, "-chain-position required when creating target", -1);
+       if (target->tap == NULL) {
+               Jim_SetResultString(goi->interp, "-chain-position required when creating target", -1);
                e = JIM_ERR;
        }
 
@@ -4346,165 +5167,275 @@ static int target_create(Jim_GetOptInfo *goi)
                target->endianness = TARGET_LITTLE_ENDIAN;
        }
 
-       /* incase variant is not set */
-       if (!target->variant)
-               target->variant = strdup("");
+       cp = Jim_GetString(new_cmd, NULL);
+       target->cmd_name = strdup(cp);
 
        /* create the target specific commands */
-       if (target->type->register_commands) {
-               (*(target->type->register_commands))(cmd_ctx);
+       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) {
+       if (target->type->target_create)
                (*(target->type->target_create))(target, goi->interp);
-       }
 
        /* append to end of list */
        {
                struct target **tpp;
                tpp = &(all_targets);
-               while (*tpp) {
+               while (*tpp)
                        tpp = &((*tpp)->next);
-               }
                *tpp = target;
        }
 
-       cp = Jim_GetString(new_cmd, NULL);
-       target->cmd_name = strdup(cp);
-
        /* now - create the new target name command */
-       e = Jim_CreateCommand(goi->interp,
-                                                  /* name */
-                                                  cp,
-                                                  tcl_target_func, /* C function */
-                                                  target, /* private data */
-                                                  NULL); /* no del proc */
+       const struct command_registration target_subcommands[] = {
+               {
+                       .chain = target_instance_command_handlers,
+               },
+               {
+                       .chain = target->type->commands,
+               },
+               COMMAND_REGISTRATION_DONE
+       };
+       const struct command_registration target_commands[] = {
+               {
+                       .name = cp,
+                       .mode = COMMAND_ANY,
+                       .help = "target command group",
+                       .usage = "",
+                       .chain = target_subcommands,
+               },
+               COMMAND_REGISTRATION_DONE
+       };
+       e = register_commands(cmd_ctx, NULL, target_commands);
+       if (ERROR_OK != e)
+               return JIM_ERR;
 
-       return e;
+       struct command *c = command_find_in_context(cmd_ctx, cp);
+       assert(c);
+       command_set_handler_data(c, target);
+
+       return (ERROR_OK == e) ? JIM_OK : JIM_ERR;
 }
 
-static int jim_target(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+static int jim_target_current(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
-       int x,r,e;
-       jim_wide w;
-       struct command_context *cmd_ctx;
-       struct target *target;
-       Jim_GetOptInfo goi;
-       enum tcmd {
-               /* TG = target generic */
-               TG_CMD_CREATE,
-               TG_CMD_TYPES,
-               TG_CMD_NAMES,
-               TG_CMD_CURRENT,
-               TG_CMD_NUMBER,
-               TG_CMD_COUNT,
-       };
-       const char *target_cmds[] = {
-               "create", "types", "names", "current", "number",
-               "count",
-               NULL /* terminate */
-       };
-
-       LOG_DEBUG("Target command params:");
-       LOG_DEBUG("%s", Jim_Debug_ArgvString(interp, argc, argv));
+       if (argc != 1) {
+               Jim_WrongNumArgs(interp, 1, argv, "Too many parameters");
+               return JIM_ERR;
+       }
+       struct command_context *cmd_ctx = current_command_context(interp);
+       assert(cmd_ctx != NULL);
 
-       cmd_ctx = Jim_GetAssocData(interp, "context");
+       Jim_SetResultString(interp, target_name(get_current_target(cmd_ctx)), -1);
+       return JIM_OK;
+}
 
-       Jim_GetOpt_Setup(&goi, interp, argc-1, argv + 1);
+static int jim_target_types(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       if (argc != 1) {
+               Jim_WrongNumArgs(interp, 1, argv, "Too many parameters");
+               return JIM_ERR;
+       }
+       Jim_SetResult(interp, Jim_NewListObj(interp, NULL, 0));
+       for (unsigned x = 0; NULL != target_types[x]; x++) {
+               Jim_ListAppendElement(interp, Jim_GetResult(interp),
+                       Jim_NewStringObj(interp, target_types[x]->name, -1));
+       }
+       return JIM_OK;
+}
 
-       if (goi.argc == 0) {
-               Jim_WrongNumArgs(interp, 1, argv, "missing: command ...");
+static int jim_target_names(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       if (argc != 1) {
+               Jim_WrongNumArgs(interp, 1, argv, "Too many parameters");
                return JIM_ERR;
        }
+       Jim_SetResult(interp, Jim_NewListObj(interp, NULL, 0));
+       struct target *target = all_targets;
+       while (target) {
+               Jim_ListAppendElement(interp, Jim_GetResult(interp),
+                       Jim_NewStringObj(interp, target_name(target), -1));
+               target = target->next;
+       }
+       return JIM_OK;
+}
 
-       /* Jim_GetOpt_Debug(&goi); */
-       r = Jim_GetOpt_Enum(&goi, target_cmds, &x);
-       if (r != JIM_OK) {
-               return r;
+static int jim_target_smp(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       int i;
+       const char *targetname;
+       int retval, len;
+       struct target *target = (struct target *) NULL;
+       struct target_list *head, *curr, *new;
+       curr = (struct target_list *) NULL;
+       head = (struct target_list *) NULL;
+
+       retval = 0;
+       LOG_DEBUG("%d", argc);
+       /* argv[1] = target to associate in smp
+        * argv[2] = target to assoicate in smp
+        * argv[3] ...
+        */
+
+       for (i = 1; i < argc; i++) {
+
+               targetname = Jim_GetString(argv[i], &len);
+               target = get_target(targetname);
+               LOG_DEBUG("%s ", targetname);
+               if (target) {
+                       new = malloc(sizeof(struct target_list));
+                       new->target = target;
+                       new->next = (struct target_list *)NULL;
+                       if (head == (struct target_list *)NULL) {
+                               head = new;
+                               curr = head;
+                       } else {
+                               curr->next = new;
+                               curr = new;
+                       }
+               }
        }
+       /*  now parse the list of cpu and put the target in smp mode*/
+       curr = head;
 
-       switch (x) {
-       default:
-               Jim_Panic(goi.interp,"Why am I here?");
+       while (curr != (struct target_list *)NULL) {
+               target = curr->target;
+               target->smp = 1;
+               target->head = head;
+               curr = curr->next;
+       }
+
+       if (target && target->rtos)
+               retval = rtos_smp_init(head->target);
+
+       return retval;
+}
+
+
+static int jim_target_create(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       Jim_GetOptInfo goi;
+       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+       if (goi.argc < 3) {
+               Jim_WrongNumArgs(goi.interp, goi.argc, goi.argv,
+                       "<name> <target_type> [<target_options> ...]");
                return JIM_ERR;
-       case TG_CMD_CURRENT:
-               if (goi.argc != 0) {
-                       Jim_WrongNumArgs(goi.interp, 1, goi.argv, "Too many parameters");
-                       return JIM_ERR;
-               }
-               Jim_SetResultString(goi.interp, get_current_target(cmd_ctx)->cmd_name, -1);
-               return JIM_OK;
-       case TG_CMD_TYPES:
-               if (goi.argc != 0) {
-                       Jim_WrongNumArgs(goi.interp, 1, goi.argv, "Too many parameters");
-                       return JIM_ERR;
-               }
-               Jim_SetResult(goi.interp, Jim_NewListObj(goi.interp, NULL, 0));
-               for (x = 0 ; target_types[x] ; x++) {
-                       Jim_ListAppendElement(goi.interp,
-                                                                  Jim_GetResult(goi.interp),
-                                                                  Jim_NewStringObj(goi.interp, target_types[x]->name, -1));
-               }
-               return JIM_OK;
-       case TG_CMD_NAMES:
-               if (goi.argc != 0) {
-                       Jim_WrongNumArgs(goi.interp, 1, goi.argv, "Too many parameters");
-                       return JIM_ERR;
-               }
-               Jim_SetResult(goi.interp, Jim_NewListObj(goi.interp, NULL, 0));
-               target = all_targets;
-               while (target) {
-                       Jim_ListAppendElement(goi.interp,
-                                                                  Jim_GetResult(goi.interp),
-                                                                  Jim_NewStringObj(goi.interp, target->cmd_name, -1));
-                       target = target->next;
-               }
-               return JIM_OK;
-       case TG_CMD_CREATE:
-               if (goi.argc < 3) {
-                       Jim_WrongNumArgs(goi.interp, goi.argc, goi.argv, "?name  ... config options ...");
-                       return JIM_ERR;
-               }
-               return target_create(&goi);
-               break;
-       case TG_CMD_NUMBER:
-               /* It's OK to remove this mechanism sometime after August 2010 or so */
-               LOG_WARNING("don't use numbers as target identifiers; use names");
-               if (goi.argc != 1) {
-                       Jim_SetResult_sprintf(goi.interp, "expected: target number ?NUMBER?");
-                       return JIM_ERR;
-               }
-               e = Jim_GetOpt_Wide(&goi, &w);
-               if (e != JIM_OK) {
-                       return JIM_ERR;
-               }
-               for (x = 0, target = all_targets; target; target = target->next, x++) {
-                       if (target->target_number == w)
-                               break;
-               }
-               if (target == NULL) {
-                       Jim_SetResult_sprintf(goi.interp,
-                                       "Target: number %d does not exist", (int)(w));
-                       return JIM_ERR;
-               }
-               Jim_SetResultString(goi.interp, target->cmd_name, -1);
-               return JIM_OK;
-       case TG_CMD_COUNT:
-               if (goi.argc != 0) {
-                       Jim_WrongNumArgs(goi.interp, 0, goi.argv, "<no parameters>");
-                       return JIM_ERR;
-               }
-               for (x = 0, target = all_targets; target; target = target->next, x++)
+       }
+       return target_create(&goi);
+}
+
+static int jim_target_number(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+       Jim_GetOptInfo goi;
+       Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
+
+       /* It's OK to remove this mechanism sometime after August 2010 or so */
+       LOG_WARNING("don't use numbers as target identifiers; use names");
+       if (goi.argc != 1) {
+               Jim_SetResultFormatted(goi.interp, "usage: target number <number>");
+               return JIM_ERR;
+       }
+       jim_wide w;
+       int e = Jim_GetOpt_Wide(&goi, &w);
+       if (e != JIM_OK)
+               return JIM_ERR;
+
+       struct target *target;
+       for (target = all_targets; NULL != target; target = target->next) {
+               if (target->target_number != w)
                        continue;
-               Jim_SetResult(goi.interp, Jim_NewIntObj(goi.interp, x));
+
+               Jim_SetResultString(goi.interp, target_name(target), -1);
                return JIM_OK;
        }
-
+       {
+               Jim_Obj *wObj = Jim_NewIntObj(goi.interp, w);
+               Jim_SetResultFormatted(goi.interp,
+                       "Target: number %#s does not exist", wObj);
+               Jim_FreeNewObj(interp, wObj);
+       }
        return JIM_ERR;
 }
 
-
-struct FastLoad
+static int jim_target_count(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
+       if (argc != 1) {
+               Jim_WrongNumArgs(interp, 1, argv, "<no parameters>");
+               return JIM_ERR;
+       }
+       unsigned count = 0;
+       struct target *target = all_targets;
+       while (NULL != target) {
+               target = target->next;
+               count++;
+       }
+       Jim_SetResult(interp, Jim_NewIntObj(interp, count));
+       return JIM_OK;
+}
+
+static const struct command_registration target_subcommand_handlers[] = {
+       {
+               .name = "init",
+               .mode = COMMAND_CONFIG,
+               .handler = handle_target_init_command,
+               .help = "initialize targets",
+       },
+       {
+               .name = "create",
+               /* REVISIT this should be COMMAND_CONFIG ... */
+               .mode = COMMAND_ANY,
+               .jim_handler = jim_target_create,
+               .usage = "name type '-chain-position' name [options ...]",
+               .help = "Creates and selects a new target",
+       },
+       {
+               .name = "current",
+               .mode = COMMAND_ANY,
+               .jim_handler = jim_target_current,
+               .help = "Returns the currently selected target",
+       },
+       {
+               .name = "types",
+               .mode = COMMAND_ANY,
+               .jim_handler = jim_target_types,
+               .help = "Returns the available target types as "
+                               "a list of strings",
+       },
+       {
+               .name = "names",
+               .mode = COMMAND_ANY,
+               .jim_handler = jim_target_names,
+               .help = "Returns the names of all targets as a list of strings",
+       },
+       {
+               .name = "number",
+               .mode = COMMAND_ANY,
+               .jim_handler = jim_target_number,
+               .usage = "number",
+               .help = "Returns the name of the numbered target "
+                       "(DEPRECATED)",
+       },
+       {
+               .name = "count",
+               .mode = COMMAND_ANY,
+               .jim_handler = jim_target_count,
+               .help = "Returns the number of targets as an integer "
+                       "(DEPRECATED)",
+       },
+       {
+               .name = "smp",
+               .mode = COMMAND_ANY,
+               .jim_handler = jim_target_smp,
+               .usage = "targetname1 targetname2 ...",
+               .help = "gather several target in a smp list"
+       },
+
+       COMMAND_REGISTRATION_DONE
+};
+
+struct FastLoad {
        uint32_t address;
        uint8_t *data;
        int length;
@@ -4516,11 +5447,9 @@ static struct FastLoad *fastload;
 
 static void free_fastload(void)
 {
-       if (fastload != NULL)
-       {
+       if (fastload != NULL) {
                int i;
-               for (i = 0; i < fastload_num; i++)
-               {
+               for (i = 0; i < fastload_num; i++) {
                        if (fastload[i].data)
                                free(fastload[i].data);
                }
@@ -4529,9 +5458,6 @@ static void free_fastload(void)
        }
 }
 
-
-
-
 COMMAND_HANDLER(handle_fast_load_image_command)
 {
        uint8_t *buffer;
@@ -4543,7 +5469,7 @@ COMMAND_HANDLER(handle_fast_load_image_command)
 
        struct image image;
 
-       int retval = CALL_COMMAND_HANDLER(parse_load_image_command_args,
+       int retval = CALL_COMMAND_HANDLER(parse_load_image_command_CMD_ARGV,
                        &image, &min_address, &max_address);
        if (ERROR_OK != retval)
                return retval;
@@ -4551,33 +5477,31 @@ COMMAND_HANDLER(handle_fast_load_image_command)
        struct duration bench;
        duration_start(&bench);
 
-       if (image_open(&image, args[0], (CMD_ARGC >= 3) ? args[2] : NULL) != ERROR_OK)
-       {
-               return ERROR_OK;
-       }
+       retval = image_open(&image, CMD_ARGV[0], (CMD_ARGC >= 3) ? CMD_ARGV[2] : NULL);
+       if (retval != ERROR_OK)
+               return retval;
 
        image_size = 0x0;
        retval = ERROR_OK;
        fastload_num = image.num_sections;
-       fastload = (struct FastLoad *)malloc(sizeof(struct FastLoad)*image.num_sections);
-       if (fastload == NULL)
-       {
+       fastload = malloc(sizeof(struct FastLoad)*image.num_sections);
+       if (fastload == NULL) {
+               command_print(CMD_CTX, "out of memory");
                image_close(&image);
                return ERROR_FAIL;
        }
        memset(fastload, 0, sizeof(struct FastLoad)*image.num_sections);
-       for (i = 0; i < image.num_sections; i++)
-       {
+       for (i = 0; i < image.num_sections; i++) {
                buffer = malloc(image.sections[i].size);
-               if (buffer == NULL)
-               {
-                       command_print(cmd_ctx, "error allocating buffer for section (%d bytes)",
+               if (buffer == NULL) {
+                       command_print(CMD_CTX, "error allocating buffer for section (%d bytes)",
                                                  (int)(image.sections[i].size));
+                       retval = ERROR_FAIL;
                        break;
                }
 
-               if ((retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt)) != ERROR_OK)
-               {
+               retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt);
+               if (retval != ERROR_OK) {
                        free(buffer);
                        break;
                }
@@ -4585,36 +5509,33 @@ COMMAND_HANDLER(handle_fast_load_image_command)
                uint32_t offset = 0;
                uint32_t length = buf_cnt;
 
-
                /* DANGER!!! beware of unsigned comparision here!!! */
 
-               if ((image.sections[i].base_address + buf_cnt >= min_address)&&
-                               (image.sections[i].base_address < max_address))
-               {
-                       if (image.sections[i].base_address < min_address)
-                       {
+               if ((image.sections[i].base_address + buf_cnt >= min_address) &&
+                               (image.sections[i].base_address < max_address)) {
+                       if (image.sections[i].base_address < min_address) {
                                /* clip addresses below */
                                offset += min_address-image.sections[i].base_address;
                                length -= offset;
                        }
 
                        if (image.sections[i].base_address + buf_cnt > max_address)
-                       {
                                length -= (image.sections[i].base_address + buf_cnt)-max_address;
-                       }
 
                        fastload[i].address = image.sections[i].base_address + offset;
                        fastload[i].data = malloc(length);
-                       if (fastload[i].data == NULL)
-                       {
+                       if (fastload[i].data == NULL) {
                                free(buffer);
+                               command_print(CMD_CTX, "error allocating buffer for section (%" PRIu32 " bytes)",
+                                                         length);
+                               retval = ERROR_FAIL;
                                break;
                        }
                        memcpy(fastload[i].data, buffer + offset, length);
                        fastload[i].length = length;
 
                        image_size += length;
-                       command_print(cmd_ctx, "%u bytes written at address 0x%8.8x",
+                       command_print(CMD_CTX, "%u bytes written at address 0x%8.8x",
                                                  (unsigned int)length,
                                                  ((unsigned int)(image.sections[i].base_address + offset)));
                }
@@ -4622,13 +5543,12 @@ COMMAND_HANDLER(handle_fast_load_image_command)
                free(buffer);
        }
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-       {
-               command_print(cmd_ctx, "Loaded %" PRIu32 " bytes "
-                               "in %fs (%0.3f kb/s)", image_size, 
+       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+               command_print(CMD_CTX, "Loaded %" PRIu32 " bytes "
+                               "in %fs (%0.3f KiB/s)", image_size,
                                duration_elapsed(&bench), duration_kbps(&bench, image_size));
 
-               command_print(cmd_ctx,
+               command_print(CMD_CTX,
                                "WARNING: image has not been loaded to target!"
                                "You can issue a 'fast_load' to finish loading.");
        }
@@ -4636,9 +5556,7 @@ COMMAND_HANDLER(handle_fast_load_image_command)
        image_close(&image);
 
        if (retval != ERROR_OK)
-       {
                free_fastload();
-       }
 
        return retval;
 }
@@ -4647,8 +5565,7 @@ COMMAND_HANDLER(handle_fast_load_command)
 {
        if (CMD_ARGC > 0)
                return ERROR_COMMAND_SYNTAX_ERROR;
-       if (fastload == NULL)
-       {
+       if (fastload == NULL) {
                LOG_ERROR("No image in memory");
                return ERROR_FAIL;
        }
@@ -4656,233 +5573,514 @@ COMMAND_HANDLER(handle_fast_load_command)
        int ms = timeval_ms();
        int size = 0;
        int retval = ERROR_OK;
-       for (i = 0; i < fastload_num;i++)
-       {
-               struct target *target = get_current_target(cmd_ctx);
-               command_print(cmd_ctx, "Write to 0x%08x, length 0x%08x",
+       for (i = 0; i < fastload_num; i++) {
+               struct target *target = get_current_target(CMD_CTX);
+               command_print(CMD_CTX, "Write to 0x%08x, length 0x%08x",
                                          (unsigned int)(fastload[i].address),
                                          (unsigned int)(fastload[i].length));
-               if (retval == ERROR_OK)
-               {
-                       retval = target_write_buffer(target, fastload[i].address, fastload[i].length, fastload[i].data);
-               }
+               retval = target_write_buffer(target, fastload[i].address, fastload[i].length, fastload[i].data);
+               if (retval != ERROR_OK)
+                       break;
                size += fastload[i].length;
        }
-       int after = timeval_ms();
-       command_print(cmd_ctx, "Loaded image %f kBytes/s", (float)(size/1024.0)/((float)(after-ms)/1000.0));
+       if (retval == ERROR_OK) {
+               int after = timeval_ms();
+               command_print(CMD_CTX, "Loaded image %f kBytes/s", (float)(size/1024.0)/((float)(after-ms)/1000.0));
+       }
        return retval;
 }
 
-static int jim_mcrmrc(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+static const struct command_registration target_command_handlers[] = {
+       {
+               .name = "targets",
+               .handler = handle_targets_command,
+               .mode = COMMAND_ANY,
+               .help = "change current default target (one parameter) "
+                       "or prints table of all targets (no parameters)",
+               .usage = "[target]",
+       },
+       {
+               .name = "target",
+               .mode = COMMAND_CONFIG,
+               .help = "configure target",
+
+               .chain = target_subcommand_handlers,
+       },
+       COMMAND_REGISTRATION_DONE
+};
+
+int target_register_commands(struct command_context *cmd_ctx)
 {
-       struct command_context *context;
-       struct target *target;
-       int retval;
+       return register_commands(cmd_ctx, NULL, target_command_handlers);
+}
 
-       context = Jim_GetAssocData(interp, "context");
-       if (context == NULL) {
-               LOG_ERROR("array2mem: no command context");
-               return JIM_ERR;
-       }
-       target = get_current_target(context);
-       if (target == NULL) {
-               LOG_ERROR("array2mem: no current target");
-               return JIM_ERR;
-       }
+static bool target_reset_nag = true;
 
-       if ((argc < 6) || (argc > 7))
-       {
-               return JIM_ERR;
-       }
+bool get_target_reset_nag(void)
+{
+       return target_reset_nag;
+}
 
-       int cpnum;
-       uint32_t op1;
-       uint32_t op2;
-       uint32_t CRn;
-       uint32_t CRm;
-       uint32_t value;
+COMMAND_HANDLER(handle_target_reset_nag)
+{
+       return CALL_COMMAND_HANDLER(handle_command_parse_bool,
+                       &target_reset_nag, "Nag after each reset about options to improve "
+                       "performance");
+}
 
-       int e;
-       long l;
-       e = Jim_GetLong(interp, argv[1], &l);
-       if (e != JIM_OK) {
-               return e;
+COMMAND_HANDLER(handle_ps_command)
+{
+       struct target *target = get_current_target(CMD_CTX);
+       char *display;
+       if (target->state != TARGET_HALTED) {
+               LOG_INFO("target not halted !!");
+               return ERROR_OK;
        }
-       cpnum = l;
 
-       e = Jim_GetLong(interp, argv[2], &l);
-       if (e != JIM_OK) {
-               return e;
+       if ((target->rtos) && (target->rtos->type)
+                       && (target->rtos->type->ps_command)) {
+               display = target->rtos->type->ps_command(target);
+               command_print(CMD_CTX, "%s", display);
+               free(display);
+               return ERROR_OK;
+       } else {
+               LOG_INFO("failed");
+               return ERROR_TARGET_FAILURE;
        }
-       op1 = l;
+}
 
-       e = Jim_GetLong(interp, argv[3], &l);
-       if (e != JIM_OK) {
-               return e;
+static void binprint(struct command_context *cmd_ctx, const char *text, const uint8_t *buf, int size)
+{
+       if (text != NULL)
+               command_print_sameline(cmd_ctx, "%s", text);
+       for (int i = 0; i < size; i++)
+               command_print_sameline(cmd_ctx, " %02x", buf[i]);
+       command_print(cmd_ctx, " ");
+}
+
+COMMAND_HANDLER(handle_test_mem_access_command)
+{
+       struct target *target = get_current_target(CMD_CTX);
+       uint32_t test_size;
+       int retval = ERROR_OK;
+
+       if (target->state != TARGET_HALTED) {
+               LOG_INFO("target not halted !!");
+               return ERROR_FAIL;
        }
-       CRn = l;
 
-       e = Jim_GetLong(interp, argv[4], &l);
-       if (e != JIM_OK) {
-               return e;
+       if (CMD_ARGC != 1)
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], test_size);
+
+       /* Test reads */
+       size_t num_bytes = test_size + 4;
+
+       struct working_area *wa = NULL;
+       retval = target_alloc_working_area(target, num_bytes, &wa);
+       if (retval != ERROR_OK) {
+               LOG_ERROR("Not enough working area");
+               return ERROR_FAIL;
        }
-       CRm = l;
 
-       e = Jim_GetLong(interp, argv[5], &l);
-       if (e != JIM_OK) {
-               return e;
+       uint8_t *test_pattern = malloc(num_bytes);
+
+       for (size_t i = 0; i < num_bytes; i++)
+               test_pattern[i] = rand();
+
+       retval = target_write_memory(target, wa->address, 1, num_bytes, test_pattern);
+       if (retval != ERROR_OK) {
+               LOG_ERROR("Test pattern write failed");
+               goto out;
        }
-       op2 = l;
 
-       value = 0;
+       for (int host_offset = 0; host_offset <= 1; host_offset++) {
+               for (int size = 1; size <= 4; size *= 2) {
+                       for (int offset = 0; offset < 4; offset++) {
+                               uint32_t count = test_size / size;
+                               size_t host_bufsiz = (count + 2) * size + host_offset;
+                               uint8_t *read_ref = malloc(host_bufsiz);
+                               uint8_t *read_buf = malloc(host_bufsiz);
 
-       if (argc == 7)
-       {
-               e = Jim_GetLong(interp, argv[6], &l);
-               if (e != JIM_OK) {
-                       return e;
+                               for (size_t i = 0; i < host_bufsiz; i++) {
+                                       read_ref[i] = rand();
+                                       read_buf[i] = read_ref[i];
+                               }
+                               command_print_sameline(CMD_CTX,
+                                               "Test read %" PRIu32 " x %d @ %d to %saligned buffer: ", count,
+                                               size, offset, host_offset ? "un" : "");
+
+                               struct duration bench;
+                               duration_start(&bench);
+
+                               retval = target_read_memory(target, wa->address + offset, size, count,
+                                               read_buf + size + host_offset);
+
+                               duration_measure(&bench);
+
+                               if (retval == ERROR_TARGET_UNALIGNED_ACCESS) {
+                                       command_print(CMD_CTX, "Unsupported alignment");
+                                       goto next;
+                               } else if (retval != ERROR_OK) {
+                                       command_print(CMD_CTX, "Memory read failed");
+                                       goto next;
+                               }
+
+                               /* replay on host */
+                               memcpy(read_ref + size + host_offset, test_pattern + offset, count * size);
+
+                               /* check result */
+                               int result = memcmp(read_ref, read_buf, host_bufsiz);
+                               if (result == 0) {
+                                       command_print(CMD_CTX, "Pass in %fs (%0.3f KiB/s)",
+                                                       duration_elapsed(&bench),
+                                                       duration_kbps(&bench, count * size));
+                               } else {
+                                       command_print(CMD_CTX, "Compare failed");
+                                       binprint(CMD_CTX, "ref:", read_ref, host_bufsiz);
+                                       binprint(CMD_CTX, "buf:", read_buf, host_bufsiz);
+                               }
+next:
+                               free(read_ref);
+                               free(read_buf);
+                       }
                }
-               value = l;
+       }
 
-               retval = target_mcr(target, cpnum, op1, op2, CRn, CRm, value);
-               if (retval != ERROR_OK)
-                       return JIM_ERR;
-       } else
-       {
-               retval = target_mrc(target, cpnum, op1, op2, CRn, CRm, &value);
-               if (retval != ERROR_OK)
-                       return JIM_ERR;
+out:
+       free(test_pattern);
+
+       if (wa != NULL)
+               target_free_working_area(target, wa);
 
-               Jim_SetResult(interp, Jim_NewIntObj(interp, value));
+       /* Test writes */
+       num_bytes = test_size + 4 + 4 + 4;
+
+       retval = target_alloc_working_area(target, num_bytes, &wa);
+       if (retval != ERROR_OK) {
+               LOG_ERROR("Not enough working area");
+               return ERROR_FAIL;
        }
 
-       return JIM_OK;
-}
+       test_pattern = malloc(num_bytes);
 
-int target_register_commands(struct command_context *cmd_ctx)
-{
+       for (size_t i = 0; i < num_bytes; i++)
+               test_pattern[i] = rand();
 
-       register_command(cmd_ctx, NULL, "targets",
-                       handle_targets_command, COMMAND_EXEC,
-                       "change current command line target (one parameter) "
-                       "or list targets (no parameters)");
+       for (int host_offset = 0; host_offset <= 1; host_offset++) {
+               for (int size = 1; size <= 4; size *= 2) {
+                       for (int offset = 0; offset < 4; offset++) {
+                               uint32_t count = test_size / size;
+                               size_t host_bufsiz = count * size + host_offset;
+                               uint8_t *read_ref = malloc(num_bytes);
+                               uint8_t *read_buf = malloc(num_bytes);
+                               uint8_t *write_buf = malloc(host_bufsiz);
 
-       register_jim(cmd_ctx, "target", jim_target, "configure target");
+                               for (size_t i = 0; i < host_bufsiz; i++)
+                                       write_buf[i] = rand();
+                               command_print_sameline(CMD_CTX,
+                                               "Test write %" PRIu32 " x %d @ %d from %saligned buffer: ", count,
+                                               size, offset, host_offset ? "un" : "");
 
-       return ERROR_OK;
-}
+                               retval = target_write_memory(target, wa->address, 1, num_bytes, test_pattern);
+                               if (retval != ERROR_OK) {
+                                       command_print(CMD_CTX, "Test pattern write failed");
+                                       goto nextw;
+                               }
 
-int target_register_user_commands(struct command_context *cmd_ctx)
-{
-       int retval = ERROR_OK;
-       if ((retval = target_request_register_commands(cmd_ctx)) != ERROR_OK)
-               return retval;
+                               /* replay on host */
+                               memcpy(read_ref, test_pattern, num_bytes);
+                               memcpy(read_ref + size + offset, write_buf + host_offset, count * size);
 
-       if ((retval = trace_register_commands(cmd_ctx)) != ERROR_OK)
-               return retval;
+                               struct duration bench;
+                               duration_start(&bench);
 
-       register_command(cmd_ctx, NULL, "profile",
-                       handle_profile_command, COMMAND_EXEC,
-                       "profiling samples the CPU PC");
+                               retval = target_write_memory(target, wa->address + size + offset, size, count,
+                                               write_buf + host_offset);
 
-       register_jim(cmd_ctx, "ocd_mem2array", jim_mem2array,
-                       "read memory and return as a TCL array for script processing "
-                       "<ARRAYNAME> <WIDTH = 32/16/8> <ADDRESS> <COUNT>");
+                               duration_measure(&bench);
 
-       register_jim(cmd_ctx, "ocd_array2mem", jim_array2mem,
-                       "convert a TCL array to memory locations and write the values "
-                       "<ARRAYNAME> <WIDTH = 32/16/8> <ADDRESS> <COUNT>");
+                               if (retval == ERROR_TARGET_UNALIGNED_ACCESS) {
+                                       command_print(CMD_CTX, "Unsupported alignment");
+                                       goto nextw;
+                               } else if (retval != ERROR_OK) {
+                                       command_print(CMD_CTX, "Memory write failed");
+                                       goto nextw;
+                               }
+
+                               /* read back */
+                               retval = target_read_memory(target, wa->address, 1, num_bytes, read_buf);
+                               if (retval != ERROR_OK) {
+                                       command_print(CMD_CTX, "Test pattern write failed");
+                                       goto nextw;
+                               }
+
+                               /* check result */
+                               int result = memcmp(read_ref, read_buf, num_bytes);
+                               if (result == 0) {
+                                       command_print(CMD_CTX, "Pass in %fs (%0.3f KiB/s)",
+                                                       duration_elapsed(&bench),
+                                                       duration_kbps(&bench, count * size));
+                               } else {
+                                       command_print(CMD_CTX, "Compare failed");
+                                       binprint(CMD_CTX, "ref:", read_ref, num_bytes);
+                                       binprint(CMD_CTX, "buf:", read_buf, num_bytes);
+                               }
+nextw:
+                               free(read_ref);
+                               free(read_buf);
+                       }
+               }
+       }
 
-       register_command(cmd_ctx, NULL, "fast_load_image",
-                       handle_fast_load_image_command, COMMAND_ANY,
-                       "same args as load_image, image stored in memory "
-                       "- mainly for profiling purposes");
+       free(test_pattern);
 
-       register_command(cmd_ctx, NULL, "fast_load",
-                       handle_fast_load_command, COMMAND_ANY,
-                       "loads active fast load image to current target "
-                       "- mainly for profiling purposes");
+       if (wa != NULL)
+               target_free_working_area(target, wa);
+       return retval;
+}
 
+static const struct command_registration target_exec_command_handlers[] = {
+       {
+               .name = "fast_load_image",
+               .handler = handle_fast_load_image_command,
+               .mode = COMMAND_ANY,
+               .help = "Load image into server memory for later use by "
+                       "fast_load; primarily for profiling",
+               .usage = "filename address ['bin'|'ihex'|'elf'|'s19'] "
+                       "[min_address [max_length]]",
+       },
+       {
+               .name = "fast_load",
+               .handler = handle_fast_load_command,
+               .mode = COMMAND_EXEC,
+               .help = "loads active fast load image to current target "
+                       "- mainly for profiling purposes",
+               .usage = "",
+       },
+       {
+               .name = "profile",
+               .handler = handle_profile_command,
+               .mode = COMMAND_EXEC,
+               .usage = "seconds filename [start end]",
+               .help = "profiling samples the CPU PC",
+       },
        /** @todo don't register virt2phys() unless target supports it */
-       register_command(cmd_ctx, NULL, "virt2phys",
-                       handle_virt2phys_command, COMMAND_ANY,
-                       "translate a virtual address into a physical address");
-
-       register_command(cmd_ctx,  NULL, "reg",
-                       handle_reg_command, COMMAND_EXEC,
-                       "display or set a register");
-
-       register_command(cmd_ctx,  NULL, "poll",
-                       handle_poll_command, COMMAND_EXEC,
-                       "poll target state");
-       register_command(cmd_ctx,  NULL, "wait_halt",
-                       handle_wait_halt_command, COMMAND_EXEC,
-                       "wait for target halt [time (s)]");
-       register_command(cmd_ctx,  NULL, "halt",
-                       handle_halt_command, COMMAND_EXEC,
-                       "halt target");
-       register_command(cmd_ctx,  NULL, "resume",
-                       handle_resume_command, COMMAND_EXEC,
-                       "resume target [addr]");
-       register_command(cmd_ctx,  NULL, "reset",
-                       handle_reset_command, COMMAND_EXEC,
-                       "reset target [run | halt | init] - default is run");
-       register_command(cmd_ctx,  NULL, "soft_reset_halt",
-                       handle_soft_reset_halt_command, COMMAND_EXEC,
-                       "halt the target and do a soft reset");
-
-       register_command(cmd_ctx,  NULL, "step",
-                       handle_step_command, COMMAND_EXEC,
-                       "step one instruction from current PC or [addr]");
-
-       register_command(cmd_ctx,  NULL, "mdw",
-                       handle_md_command, COMMAND_EXEC,
-                       "display memory words [phys] <addr> [count]");
-       register_command(cmd_ctx,  NULL, "mdh",
-                       handle_md_command, COMMAND_EXEC,
-                       "display memory half-words [phys] <addr> [count]");
-       register_command(cmd_ctx,  NULL, "mdb",
-                       handle_md_command, COMMAND_EXEC,
-                       "display memory bytes [phys] <addr> [count]");
-
-       register_command(cmd_ctx,  NULL, "mww",
-                       handle_mw_command, COMMAND_EXEC,
-                       "write memory word [phys]  <addr> <value> [count]");
-       register_command(cmd_ctx,  NULL, "mwh",
-                       handle_mw_command, COMMAND_EXEC,
-                       "write memory half-word [phys]  <addr> <value> [count]");
-       register_command(cmd_ctx,  NULL, "mwb",
-                       handle_mw_command, COMMAND_EXEC,
-                       "write memory byte [phys] <addr> <value> [count]");
-
-       register_command(cmd_ctx,  NULL, "bp",
-                       handle_bp_command, COMMAND_EXEC,
-                       "list or set breakpoint [<address> <length> [hw]]");
-       register_command(cmd_ctx,  NULL, "rbp",
-                       handle_rbp_command, COMMAND_EXEC,
-                       "remove breakpoint <address>");
-
-       register_command(cmd_ctx,  NULL, "wp",
-                       handle_wp_command, COMMAND_EXEC,
-                       "list or set watchpoint "
-                               "[<address> <length> <r/w/a> [value] [mask]]");
-       register_command(cmd_ctx,  NULL, "rwp",
-                       handle_rwp_command, COMMAND_EXEC,
-                       "remove watchpoint <address>");
-
-       register_command(cmd_ctx,  NULL, "load_image",
-                       handle_load_image_command, COMMAND_EXEC,
-                       "load_image <file> <address> "
-                       "['bin'|'ihex'|'elf'|'s19'] [min_address] [max_length]");
-       register_command(cmd_ctx,  NULL, "dump_image",
-                       handle_dump_image_command, COMMAND_EXEC,
-                       "dump_image <file> <address> <size>");
-       register_command(cmd_ctx,  NULL, "verify_image",
-                       handle_verify_image_command, COMMAND_EXEC,
-                       "verify_image <file> [offset] [type]");
-       register_command(cmd_ctx,  NULL, "test_image",
-                       handle_test_image_command, COMMAND_EXEC,
-                       "test_image <file> [offset] [type]");
+       {
+               .name = "virt2phys",
+               .handler = handle_virt2phys_command,
+               .mode = COMMAND_ANY,
+               .help = "translate a virtual address into a physical address",
+               .usage = "virtual_address",
+       },
+       {
+               .name = "reg",
+               .handler = handle_reg_command,
+               .mode = COMMAND_EXEC,
+               .help = "display (reread from target with \"force\") or set a register; "
+                       "with no arguments, displays all registers and their values",
+               .usage = "[(register_number|register_name) [(value|'force')]]",
+       },
+       {
+               .name = "poll",
+               .handler = handle_poll_command,
+               .mode = COMMAND_EXEC,
+               .help = "poll target state; or reconfigure background polling",
+               .usage = "['on'|'off']",
+       },
+       {
+               .name = "wait_halt",
+               .handler = handle_wait_halt_command,
+               .mode = COMMAND_EXEC,
+               .help = "wait up to the specified number of milliseconds "
+                       "(default 5000) for a previously requested halt",
+               .usage = "[milliseconds]",
+       },
+       {
+               .name = "halt",
+               .handler = handle_halt_command,
+               .mode = COMMAND_EXEC,
+               .help = "request target to halt, then wait up to the specified"
+                       "number of milliseconds (default 5000) for it to complete",
+               .usage = "[milliseconds]",
+       },
+       {
+               .name = "resume",
+               .handler = handle_resume_command,
+               .mode = COMMAND_EXEC,
+               .help = "resume target execution from current PC or address",
+               .usage = "[address]",
+       },
+       {
+               .name = "reset",
+               .handler = handle_reset_command,
+               .mode = COMMAND_EXEC,
+               .usage = "[run|halt|init]",
+               .help = "Reset all targets into the specified mode."
+                       "Default reset mode is run, if not given.",
+       },
+       {
+               .name = "soft_reset_halt",
+               .handler = handle_soft_reset_halt_command,
+               .mode = COMMAND_EXEC,
+               .usage = "",
+               .help = "halt the target and do a soft reset",
+       },
+       {
+               .name = "step",
+               .handler = handle_step_command,
+               .mode = COMMAND_EXEC,
+               .help = "step one instruction from current PC or address",
+               .usage = "[address]",
+       },
+       {
+               .name = "mdw",
+               .handler = handle_md_command,
+               .mode = COMMAND_EXEC,
+               .help = "display memory words",
+               .usage = "['phys'] address [count]",
+       },
+       {
+               .name = "mdh",
+               .handler = handle_md_command,
+               .mode = COMMAND_EXEC,
+               .help = "display memory half-words",
+               .usage = "['phys'] address [count]",
+       },
+       {
+               .name = "mdb",
+               .handler = handle_md_command,
+               .mode = COMMAND_EXEC,
+               .help = "display memory bytes",
+               .usage = "['phys'] address [count]",
+       },
+       {
+               .name = "mww",
+               .handler = handle_mw_command,
+               .mode = COMMAND_EXEC,
+               .help = "write memory word",
+               .usage = "['phys'] address value [count]",
+       },
+       {
+               .name = "mwh",
+               .handler = handle_mw_command,
+               .mode = COMMAND_EXEC,
+               .help = "write memory half-word",
+               .usage = "['phys'] address value [count]",
+       },
+       {
+               .name = "mwb",
+               .handler = handle_mw_command,
+               .mode = COMMAND_EXEC,
+               .help = "write memory byte",
+               .usage = "['phys'] address value [count]",
+       },
+       {
+               .name = "bp",
+               .handler = handle_bp_command,
+               .mode = COMMAND_EXEC,
+               .help = "list or set hardware or software breakpoint",
+               .usage = "<address> [<asid>]<length> ['hw'|'hw_ctx']",
+       },
+       {
+               .name = "rbp",
+               .handler = handle_rbp_command,
+               .mode = COMMAND_EXEC,
+               .help = "remove breakpoint",
+               .usage = "address",
+       },
+       {
+               .name = "wp",
+               .handler = handle_wp_command,
+               .mode = COMMAND_EXEC,
+               .help = "list (no params) or create watchpoints",
+               .usage = "[address length [('r'|'w'|'a') value [mask]]]",
+       },
+       {
+               .name = "rwp",
+               .handler = handle_rwp_command,
+               .mode = COMMAND_EXEC,
+               .help = "remove watchpoint",
+               .usage = "address",
+       },
+       {
+               .name = "load_image",
+               .handler = handle_load_image_command,
+               .mode = COMMAND_EXEC,
+               .usage = "filename address ['bin'|'ihex'|'elf'|'s19'] "
+                       "[min_address] [max_length]",
+       },
+       {
+               .name = "dump_image",
+               .handler = handle_dump_image_command,
+               .mode = COMMAND_EXEC,
+               .usage = "filename address size",
+       },
+       {
+               .name = "verify_image",
+               .handler = handle_verify_image_command,
+               .mode = COMMAND_EXEC,
+               .usage = "filename [offset [type]]",
+       },
+       {
+               .name = "test_image",
+               .handler = handle_test_image_command,
+               .mode = COMMAND_EXEC,
+               .usage = "filename [offset [type]]",
+       },
+       {
+               .name = "mem2array",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_mem2array,
+               .help = "read 8/16/32 bit memory and return as a TCL array "
+                       "for script processing",
+               .usage = "arrayname bitwidth address count",
+       },
+       {
+               .name = "array2mem",
+               .mode = COMMAND_EXEC,
+               .jim_handler = jim_array2mem,
+               .help = "convert a TCL array to memory locations "
+                       "and write the 8/16/32 bit values",
+               .usage = "arrayname bitwidth address count",
+       },
+       {
+               .name = "reset_nag",
+               .handler = handle_target_reset_nag,
+               .mode = COMMAND_ANY,
+               .help = "Nag after each reset about options that could have been "
+                               "enabled to improve performance. ",
+               .usage = "['enable'|'disable']",
+       },
+       {
+               .name = "ps",
+               .handler = handle_ps_command,
+               .mode = COMMAND_EXEC,
+               .help = "list all tasks ",
+               .usage = " ",
+       },
+       {
+               .name = "test_mem_access",
+               .handler = handle_test_mem_access_command,
+               .mode = COMMAND_EXEC,
+               .help = "Test the target's memory access functions",
+               .usage = "size",
+       },
+
+       COMMAND_REGISTRATION_DONE
+};
+static int target_register_user_commands(struct command_context *cmd_ctx)
+{
+       int retval = ERROR_OK;
+       retval = target_request_register_commands(cmd_ctx);
+       if (retval != ERROR_OK)
+               return retval;
 
-       return ERROR_OK;
+       retval = trace_register_commands(cmd_ctx);
+       if (retval != ERROR_OK)
+               return retval;
+
+
+       return register_commands(cmd_ctx, NULL, target_exec_command_handlers);
 }

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