target/target.c

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/***************************************************************************
 *   Copyright (C) 2005 by Dominic Rath                                    *
 *   Dominic.Rath@gmx.de                                                   *
 *                                                                         *
 *   Copyright (C) 2007-2010 Øyvind Harboe                                 *
 *   oyvind.harboe@zylin.com                                               *
 *                                                                         *
 *   Copyright (C) 2008, Duane Ellis                                       *
 *   openocd@duaneeellis.com                                               *
 *                                                                         *
 *   Copyright (C) 2008 by Spencer Oliver                                  *
 *   spen@spen-soft.co.uk                                                  *
 *                                                                         *
 *   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     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
 ***************************************************************************/

#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 "register.h"
#include "trace.h"
#include "image.h"
#include "rtos/rtos.h"
#include "transport/transport.h"
#include "arm_cti.h"

/* default halt wait timeout (ms) */
#define DEFAULT_HALT_TIMEOUT 5000

static int target_read_buffer_default(struct target *target, target_addr_t address,
        uint32_t count, uint8_t *buffer);
static int target_write_buffer_default(struct target *target, target_addr_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);

/* targets */
extern struct target_type arm7tdmi_target;
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 cortexm_target;
extern struct target_type cortexa_target;
extern struct target_type aarch64_target;
extern struct target_type cortexr4_target;
extern struct target_type arm11_target;
extern struct target_type ls1_sap_target;
extern struct target_type mips_m4k_target;
extern struct target_type mips_mips64_target;
extern struct target_type avr_target;
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;
extern struct target_type quark_d20xx_target;
extern struct target_type stm8_target;
extern struct target_type riscv_target;
extern struct target_type mem_ap_target;
extern struct target_type esirisc_target;
extern struct target_type arcv2_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,
    &cortexm_target,
    &cortexa_target,
    &cortexr4_target,
    &arm11_target,
    &ls1_sap_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,
    &quark_d20xx_target,
    &stm8_target,
    &riscv_target,
    &mem_ap_target,
    &esirisc_target,
    &arcv2_target,
    &aarch64_target,
    &mips_mips64_target,
    NULL,
};

struct target *all_targets;
static struct target_event_callback *target_event_callbacks;
static struct target_timer_callback *target_timer_callbacks;
static LIST_HEAD(target_reset_callback_list);
static LIST_HEAD(target_trace_callback_list);
static const int polling_interval = 100;

static const Jim_Nvp nvp_assert[] = {
    { .name = "assert", NVP_ASSERT },
    { .name = "deassert", NVP_DEASSERT },
    { .name = "T", NVP_ASSERT },
    { .name = "F", NVP_DEASSERT },
    { .name = "t", NVP_ASSERT },
    { .name = "f", NVP_DEASSERT },
    { .name = NULL, .value = -1 }
};

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" },
    { .value = ERROR_TARGET_NOT_HALTED, .name = "err-not-halted" },
    { .value = ERROR_TARGET_FAILURE, .name = "err-failure" },
    { .value = ERROR_TARGET_UNALIGNED_ACCESS, .name = "err-unaligned-access" },
    { .value = ERROR_TARGET_DATA_ABORT, .name = "err-data-abort" },
    { .value = ERROR_TARGET_RESOURCE_NOT_AVAILABLE, .name = "err-resource-not-available" },
    { .value = ERROR_TARGET_TRANSLATION_FAULT, .name = "err-translation-fault" },
    { .value = ERROR_TARGET_NOT_RUNNING, .name = "err-not-running" },
    { .value = ERROR_TARGET_NOT_EXAMINED, .name = "err-not-examined" },
    { .value = -1, .name = NULL }
};

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)
        return "unknown";
    else
        return n->name;
}

static const Jim_Nvp nvp_target_event[] = {

    { .value = TARGET_EVENT_GDB_HALT, .name = "gdb-halt" },
    { .value = TARGET_EVENT_HALTED, .name = "halted" },
    { .value = TARGET_EVENT_RESUMED, .name = "resumed" },
    { .value = TARGET_EVENT_RESUME_START, .name = "resume-start" },
    { .value = TARGET_EVENT_RESUME_END, .name = "resume-end" },
    { .value = TARGET_EVENT_STEP_START, .name = "step-start" },
    { .value = TARGET_EVENT_STEP_END, .name = "step-end" },

    { .name = "gdb-start", .value = TARGET_EVENT_GDB_START },
    { .name = "gdb-end", .value = TARGET_EVENT_GDB_END },

    { .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" },
    { .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_FAIL, .name = "examine-fail" },
    { .value = TARGET_EVENT_EXAMINE_END, .name = "examine-end" },

    { .value = TARGET_EVENT_DEBUG_HALTED, .name = "debug-halted" },
    { .value = TARGET_EVENT_DEBUG_RESUMED, .name = "debug-resumed" },

    { .value = TARGET_EVENT_GDB_ATTACH, .name = "gdb-attach" },
    { .value = TARGET_EVENT_GDB_DETACH, .name = "gdb-detach" },

    { .value = TARGET_EVENT_GDB_FLASH_WRITE_START, .name = "gdb-flash-write-start" },
    { .value = TARGET_EVENT_GDB_FLASH_WRITE_END,   .name = "gdb-flash-write-end"   },

    { .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_TRACE_CONFIG, .name = "trace-config" },

    { .name = NULL, .value = -1 }
};

static const Jim_Nvp nvp_target_state[] = {
    { .name = "unknown", .value = TARGET_UNKNOWN },
    { .name = "running", .value = TARGET_RUNNING },
    { .name = "halted",  .value = TARGET_HALTED },
    { .name = "reset",   .value = TARGET_RESET },
    { .name = "debug-running", .value = TARGET_DEBUG_RUNNING },
    { .name = NULL, .value = -1 },
};

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 = "exception-catch",           .value = DBG_REASON_EXC_CATCH },
    { .name = "undefined",                 .value = DBG_REASON_UNDEFINED },
    { .name = NULL, .value = -1 },
};

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 },
    { .name = "le",     .value = TARGET_LITTLE_ENDIAN },
    { .name = NULL,     .value = -1 },
};

static const Jim_Nvp nvp_reset_modes[] = {
    { .name = "unknown", .value = RESET_UNKNOWN },
    { .name = "run",     .value = RESET_RUN },
    { .name = "halt",    .value = RESET_HALT },
    { .name = "init",    .value = RESET_INIT },
    { .name = NULL,      .value = -1 },
};

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) {
        LOG_ERROR("Invalid target state: %d", (int)(t->state));
        cp = "(*BUG*unknown*BUG*)";
    }

    if (!target_was_examined(t) && t->defer_examine)
        cp = "examine deferred";

    return cp;
}

const char *target_event_name(enum target_event event)
{
    const char *cp;
    cp = Jim_Nvp_value2name_simple(nvp_target_event, event)->name;
    if (!cp) {
        LOG_ERROR("Invalid target event: %d", (int)(event));
        cp = "(*BUG*unknown*BUG*)";
    }
    return cp;
}

const char *target_reset_mode_name(enum target_reset_mode reset_mode)
{
    const char *cp;
    cp = Jim_Nvp_value2name_simple(nvp_reset_modes, reset_mode)->name;
    if (!cp) {
        LOG_ERROR("Invalid target reset mode: %d", (int)(reset_mode));
        cp = "(*BUG*unknown*BUG*)";
    }
    return cp;
}

/* determine the number of the new target */
static int new_target_number(void)
{
    struct target *t;
    int x;

    /* number is 0 based */
    x = -1;
    t = all_targets;
    while (t) {
        if (x < t->target_number)
            x = t->target_number;
        t = t->next;
    }
    return x + 1;
}

static void append_to_list_all_targets(struct target *target)
{
    struct target **t = &all_targets;

    while (*t)
        t = &((*t)->next);
    *t = target;
}

/* 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)
{
    if (target->endianness == TARGET_LITTLE_ENDIAN)
        return le_to_h_u32(buffer);
    else
        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)
{
    if (target->endianness == TARGET_LITTLE_ENDIAN)
        return le_to_h_u16(buffer);
    else
        return be_to_h_u16(buffer);
}

/* 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)
{
    if (target->endianness == TARGET_LITTLE_ENDIAN)
        h_u32_to_le(buffer, value);
    else
        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)
{
    if (target->endianness == TARGET_LITTLE_ENDIAN)
        h_u16_to_le(buffer, value);
    else
        h_u16_to_be(buffer, value);
}

/* write a uint8_t to a buffer in target memory endianness */
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)
{
    struct target *target;

    /* try as tcltarget name */
    for (target = all_targets; target; target = target->next) {
        if (target_name(target) == NULL)
            continue;
        if (strcmp(id, target_name(target)) == 0)
            return target;
    }

    /* It's OK to remove this fallback sometime after August 2010 or so */

    /* no match, try as number */
    unsigned num;
    if (parse_uint(id, &num) != ERROR_OK)
        return NULL;

    for (target = all_targets; target; target = target->next) {
        if (target->target_number == (int)num) {
            LOG_WARNING("use '%s' as target identifier, not '%u'",
                    target_name(target), num);
            return target;
        }
    }

    return NULL;
}

/* returns a pointer to the n-th configured target */
struct target *get_target_by_num(int num)
{
    struct target *target = all_targets;

    while (target) {
        if (target->target_number == num)
            return target;
        target = target->next;
    }

    return NULL;
}

struct target *get_current_target(struct command_context *cmd_ctx)
{
    struct target *target = get_current_target_or_null(cmd_ctx);

    if (target == NULL) {
        LOG_ERROR("BUG: current_target out of bounds");
        exit(-1);
    }

    return target;
}

struct target *get_current_target_or_null(struct command_context *cmd_ctx)
{
    return cmd_ctx->current_target_override
        ? cmd_ctx->current_target_override
        : cmd_ctx->current_target;
}

int target_poll(struct target *target)
{
    int retval;

    /* We can't poll until after examine */
    if (!target_was_examined(target)) {
        /* Fail silently lest we pollute the log */
        return ERROR_FAIL;
    }

    retval = target->type->poll(target);
    if (retval != ERROR_OK)
        return retval;

    if (target->halt_issued) {
        if (target->state == TARGET_HALTED)
            target->halt_issued = false;
        else {
            int64_t t = timeval_ms() - target->halt_issued_time;
            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);
            }
        }
    }

    return ERROR_OK;
}

int target_halt(struct target *target)
{
    int retval;
    /* We can't poll until after examine */
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    retval = target->type->halt(target);
    if (retval != ERROR_OK)
        return retval;

    target->halt_issued = true;
    target->halt_issued_time = timeval_ms();

    return ERROR_OK;
}

int target_resume(struct target *target, int current, target_addr_t address,
        int handle_breakpoints, int debug_execution)
{
    int retval;

    /* We can't poll until after examine */
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    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.
     */
    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;
}

static int target_process_reset(struct command_invocation *cmd, enum target_reset_mode reset_mode)
{
    char buf[100];
    int retval;
    Jim_Nvp *n;
    n = Jim_Nvp_value2name_simple(nvp_reset_modes, reset_mode);
    if (n->name == NULL) {
        LOG_ERROR("invalid reset mode");
        return ERROR_FAIL;
    }

    struct target *target;
    for (target = all_targets; target; target = target->next)
        target_call_reset_callbacks(target, reset_mode);

    /* disable polling during reset to make reset event scripts
     * more predictable, i.e. dr/irscan & pathmove in events will
     * not have JTAG operations injected into the middle of a sequence.
     */
    bool save_poll = jtag_poll_get_enabled();

    jtag_poll_set_enabled(false);

    sprintf(buf, "ocd_process_reset %s", n->name);
    retval = Jim_Eval(cmd->ctx->interp, buf);

    jtag_poll_set_enabled(save_poll);

    if (retval != JIM_OK) {
        Jim_MakeErrorMessage(cmd->ctx->interp);
        command_print(cmd, "%s", 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();

    for (target = all_targets; target; target = target->next) {
        target->type->check_reset(target);
        target->running_alg = false;
    }

    return retval;
}

static int identity_virt2phys(struct target *target,
        target_addr_t virtual, target_addr_t *physical)
{
    *physical = virtual;
    return ERROR_OK;
}

static int no_mmu(struct target *target, int *enabled)
{
    *enabled = 0;
    return ERROR_OK;
}

static int default_examine(struct target *target)
{
    target_set_examined(target);
    return ERROR_OK;
}

/* no check by default */
static int default_check_reset(struct target *target)
{
    return ERROR_OK;
}

/* Equivalent Tcl code arp_examine_one is in src/target/startup.tcl
 * Keep in sync */
int target_examine_one(struct target *target)
{
    target_call_event_callbacks(target, TARGET_EVENT_EXAMINE_START);

    int retval = target->type->examine(target);
    if (retval != ERROR_OK) {
        target_call_event_callbacks(target, TARGET_EVENT_EXAMINE_FAIL);
        return retval;
    }

    target_call_event_callbacks(target, TARGET_EVENT_EXAMINE_END);

    return ERROR_OK;
}

static int jtag_enable_callback(enum jtag_event event, void *priv)
{
    struct target *target = priv;

    if (event != JTAG_TAP_EVENT_ENABLE || !target->tap->enabled)
        return ERROR_OK;

    jtag_unregister_event_callback(jtag_enable_callback, target);

    return target_examine_one(target);
}

/* Targets that correctly implement init + examine, i.e.
 * no communication with target during init:
 *
 * XScale
 */
int target_examine(void)
{
    int retval = ERROR_OK;
    struct target *target;

    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 (target->defer_examine)
            continue;

        int retval2 = target_examine_one(target);
        if (retval2 != ERROR_OK) {
            LOG_WARNING("target %s examination failed", target_name(target));
            retval = retval2;
        }
    }
    return retval;
}

const char *target_type_name(struct target *target)
{
    return target->type->name;
}

static int target_soft_reset_halt(struct target *target)
{
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }
    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);
}

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 retval = ERROR_FAIL;

    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        goto done;
    }
    if (!target->type->run_algorithm) {
        LOG_ERROR("Target type '%s' does not support %s",
                target_type_name(target), __func__);
        goto done;
    }

    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;
}

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)
{
    int retval = ERROR_FAIL;

    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        goto done;
    }
    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;
    }

    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;
}

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)
{
    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;
}

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 - fifo_start_addr) & (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(2);

            /* 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++ >= 2500) {
                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;

        /* Force end of large blocks to be word aligned */
        if (thisrun_bytes >= 16)
            thisrun_bytes -= (rp + thisrun_bytes) & 0x03;

        /* 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;

        /* Avoid GDB timeouts */
        keep_alive();
    }

    if (retval != ERROR_OK) {
        /* abort flash write algorithm on target */
        target_write_u32(target, wp_addr, 0);
    }

    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;
    }

    if (retval == ERROR_OK) {
        /* check if algorithm set rp = 0 after fifo writer loop finished */
        retval = target_read_u32(target, rp_addr, &rp);
        if (retval == ERROR_OK && rp == 0) {
            LOG_ERROR("flash write algorithm aborted by target");
            retval = ERROR_FLASH_OPERATION_FAILED;
        }
    }

    return retval;
}

int target_run_read_async_algorithm(struct target *target,
        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 */
    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 read algorithm");
        return retval;
    }

    while (count > 0) {
        retval = target_read_u32(target, wp_addr, &wp);
        if (retval != ERROR_OK) {
            LOG_ERROR("failed to get write 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 (wp == 0) {
            LOG_ERROR("flash read algorithm aborted by target");
            retval = ERROR_FLASH_OPERATION_FAILED;
            break;
        }

        if (((wp - fifo_start_addr) & (block_size - 1)) || wp < fifo_start_addr || wp >= fifo_end_addr) {
            LOG_ERROR("corrupted fifo write pointer 0x%" PRIx32, wp);
            break;
        }

        /* Count the number of bytes available in the fifo without
         * crossing the wrap around. */
        uint32_t thisrun_bytes;
        if (wp >= rp)
            thisrun_bytes = wp - rp;
        else
            thisrun_bytes = fifo_end_addr - rp;

        if (thisrun_bytes == 0) {
            /* Throttle polling a bit if transfer is (much) faster than flash
             * reading. 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(2);

            /* 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++ >= 2500) {
                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 read */
        if (thisrun_bytes > count * block_size)
            thisrun_bytes = count * block_size;

        /* Force end of large blocks to be word aligned */
        if (thisrun_bytes >= 16)
            thisrun_bytes -= (rp + thisrun_bytes) & 0x03;

        /* Read data from fifo */
        retval = target_read_buffer(target, rp, thisrun_bytes, buffer);
        if (retval != ERROR_OK)
            break;

        /* Update counters and wrap write pointer */
        buffer += thisrun_bytes;
        count -= thisrun_bytes / block_size;
        rp += thisrun_bytes;
        if (rp >= fifo_end_addr)
            rp = fifo_start_addr;

        /* Store updated write pointer to target */
        retval = target_write_u32(target, rp_addr, rp);
        if (retval != ERROR_OK)
            break;

        /* Avoid GDB timeouts */
        keep_alive();

    }

    if (retval != ERROR_OK) {
        /* abort flash write algorithm on target */
        target_write_u32(target, rp_addr, 0);
    }

    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;
    }

    if (retval == ERROR_OK) {
        /* check if algorithm set wp = 0 after fifo writer loop finished */
        retval = target_read_u32(target, wp_addr, &wp);
        if (retval == ERROR_OK && wp == 0) {
            LOG_ERROR("flash read algorithm aborted by target");
            retval = ERROR_FLASH_OPERATION_FAILED;
        }
    }

    return retval;
}

int target_read_memory(struct target *target,
        target_addr_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;
    }
    if (!target->type->read_memory) {
        LOG_ERROR("Target %s doesn't support read_memory", target_name(target));
        return ERROR_FAIL;
    }
    return target->type->read_memory(target, address, size, count, buffer);
}

int target_read_phys_memory(struct target *target,
        target_addr_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;
    }
    if (!target->type->read_phys_memory) {
        LOG_ERROR("Target %s doesn't support read_phys_memory", target_name(target));
        return ERROR_FAIL;
    }
    return target->type->read_phys_memory(target, address, size, count, buffer);
}

int target_write_memory(struct target *target,
        target_addr_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;
    }
    if (!target->type->write_memory) {
        LOG_ERROR("Target %s doesn't support write_memory", target_name(target));
        return ERROR_FAIL;
    }
    return target->type->write_memory(target, address, size, count, buffer);
}

int target_write_phys_memory(struct target *target,
        target_addr_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;
    }
    if (!target->type->write_phys_memory) {
        LOG_ERROR("Target %s doesn't support write_phys_memory", target_name(target));
        return ERROR_FAIL;
    }
    return target->type->write_phys_memory(target, address, size, count, buffer);
}

int target_add_breakpoint(struct target *target,
        struct breakpoint *breakpoint)
{
    if ((target->state != TARGET_HALTED) && (breakpoint->type != BKPT_HARD)) {
        LOG_WARNING("target %s is not halted (add breakpoint)", target_name(target));
        return ERROR_TARGET_NOT_HALTED;
    }
    return target->type->add_breakpoint(target, breakpoint);
}

int target_add_context_breakpoint(struct target *target,
        struct breakpoint *breakpoint)
{
    if (target->state != TARGET_HALTED) {
        LOG_WARNING("target %s is not halted (add context breakpoint)", target_name(target));
        return ERROR_TARGET_NOT_HALTED;
    }
    return target->type->add_context_breakpoint(target, breakpoint);
}

int target_add_hybrid_breakpoint(struct target *target,
        struct breakpoint *breakpoint)
{
    if (target->state != TARGET_HALTED) {
        LOG_WARNING("target %s is not halted (add hybrid breakpoint)", target_name(target));
        return ERROR_TARGET_NOT_HALTED;
    }
    return target->type->add_hybrid_breakpoint(target, breakpoint);
}

int target_remove_breakpoint(struct target *target,
        struct breakpoint *breakpoint)
{
    return target->type->remove_breakpoint(target, breakpoint);
}

int target_add_watchpoint(struct target *target,
        struct watchpoint *watchpoint)
{
    if (target->state != TARGET_HALTED) {
        LOG_WARNING("target %s is not halted (add watchpoint)", target_name(target));
        return ERROR_TARGET_NOT_HALTED;
    }
    return target->type->add_watchpoint(target, watchpoint);
}
int target_remove_watchpoint(struct target *target,
        struct watchpoint *watchpoint)
{
    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 (hit watchpoint)", 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);
}

const char *target_get_gdb_arch(struct target *target)
{
    if (target->type->get_gdb_arch == NULL)
        return NULL;
    return target->type->get_gdb_arch(target);
}

int target_get_gdb_reg_list(struct target *target,
        struct reg **reg_list[], int *reg_list_size,
        enum target_register_class reg_class)
{
    int result = ERROR_FAIL;

    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        goto done;
    }

    result = target->type->get_gdb_reg_list(target, reg_list,
            reg_list_size, reg_class);

done:
    if (result != ERROR_OK) {
        *reg_list = NULL;
        *reg_list_size = 0;
    }
    return result;
}

int target_get_gdb_reg_list_noread(struct target *target,
        struct reg **reg_list[], int *reg_list_size,
        enum target_register_class reg_class)
{
    if (target->type->get_gdb_reg_list_noread &&
            target->type->get_gdb_reg_list_noread(target, reg_list,
                reg_list_size, reg_class) == ERROR_OK)
        return ERROR_OK;
    return target_get_gdb_reg_list(target, reg_list, reg_list_size, reg_class);
}

bool target_supports_gdb_connection(struct target *target)
{
    /*
     * exclude all the targets that don't provide get_gdb_reg_list
     * or that have explicit gdb_max_connection == 0
     */
    return !!target->type->get_gdb_reg_list && !!target->gdb_max_connections;
}

int target_step(struct target *target,
        int current, target_addr_t address, int handle_breakpoints)
{
    int retval;

    target_call_event_callbacks(target, TARGET_EVENT_STEP_START);

    retval = target->type->step(target, current, address, handle_breakpoints);
    if (retval != ERROR_OK)
        return retval;

    target_call_event_callbacks(target, TARGET_EVENT_STEP_END);

    return retval;
}

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 (gdb fileio)", target->cmd_name);
        return ERROR_TARGET_NOT_HALTED;
    }
    return target->type->get_gdb_fileio_info(target, fileio_info);
}

int target_gdb_fileio_end(struct target *target, int retcode, int fileio_errno, bool ctrl_c)
{
    if (target->state != TARGET_HALTED) {
        LOG_WARNING("target %s is not halted (gdb fileio end)", target->cmd_name);
        return ERROR_TARGET_NOT_HALTED;
    }
    return target->type->gdb_fileio_end(target, retcode, fileio_errno, ctrl_c);
}

target_addr_t target_address_max(struct target *target)
{
    unsigned bits = target_address_bits(target);
    if (sizeof(target_addr_t) * 8 == bits)
        return (target_addr_t) -1;
    else
        return (((target_addr_t) 1) << bits) - 1;
}

unsigned target_address_bits(struct target *target)
{
    if (target->type->address_bits)
        return target->type->address_bits(target);
    return 32;
}

static int target_profiling(struct target *target, uint32_t *samples,
            uint32_t max_num_samples, uint32_t *num_samples, uint32_t seconds)
{
    return target->type->profiling(target, samples, max_num_samples,
            num_samples, seconds);
}

static void target_reset_examined(struct target *target)
{
    target->examined = false;
}

static int handle_target(void *priv);

static int target_init_one(struct command_context *cmd_ctx,
        struct target *target)
{
    target_reset_examined(target);

    struct target_type *type = target->type;
    if (type->examine == NULL)
        type->examine = default_examine;

    if (type->check_reset == NULL)
        type->check_reset = default_check_reset;

    assert(type->init_target != NULL);

    int retval = type->init_target(cmd_ctx, target);
    if (ERROR_OK != retval) {
        LOG_ERROR("target '%s' init failed", target_name(target));
        return 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->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);

        type->mmu = no_mmu;
        type->write_phys_memory = type->write_memory;
        type->read_phys_memory = type->read_memory;
        type->virt2phys = identity_virt2phys;
    }

    if (target->type->read_buffer == NULL)
        target->type->read_buffer = target_read_buffer_default;

    if (target->type->write_buffer == NULL)
        target->type->write_buffer = target_write_buffer_default;

    if (target->type->get_gdb_fileio_info == NULL)
        target->type->get_gdb_fileio_info = target_get_gdb_fileio_info_default;

    if (target->type->gdb_fileio_end == NULL)
        target->type->gdb_fileio_end = target_gdb_fileio_end_default;

    if (target->type->profiling == NULL)
        target->type->profiling = target_profiling_default;

    return ERROR_OK;
}

static int target_init(struct command_context *cmd_ctx)
{
    struct target *target;
    int retval;

    for (target = all_targets; target; target = target->next) {
        retval = target_init_one(cmd_ctx, target);
        if (ERROR_OK != retval)
            return retval;
    }

    if (!all_targets)
        return ERROR_OK;

    retval = target_register_user_commands(cmd_ctx);
    if (ERROR_OK != retval)
        return retval;

    retval = target_register_timer_callback(&handle_target,
            polling_interval, TARGET_TIMER_TYPE_PERIODIC, cmd_ctx->interp);
    if (ERROR_OK != retval)
        return retval;

    return ERROR_OK;
}

COMMAND_HANDLER(handle_target_init_command)
{
    int retval;

    if (CMD_ARGC != 0)
        return ERROR_COMMAND_SYNTAX_ERROR;

    static bool target_initialized;
    if (target_initialized) {
        LOG_INFO("'target init' has already been called");
        return ERROR_OK;
    }
    target_initialized = true;

    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)
{
    struct target_event_callback **callbacks_p = &target_event_callbacks;

    if (callback == NULL)
        return ERROR_COMMAND_SYNTAX_ERROR;

    if (*callbacks_p) {
        while ((*callbacks_p)->next)
            callbacks_p = &((*callbacks_p)->next);
        callbacks_p = &((*callbacks_p)->next);
    }

    (*callbacks_p) = malloc(sizeof(struct target_event_callback));
    (*callbacks_p)->callback = callback;
    (*callbacks_p)->priv = priv;
    (*callbacks_p)->next = NULL;

    return ERROR_OK;
}

int target_register_reset_callback(int (*callback)(struct target *target,
        enum target_reset_mode reset_mode, void *priv), void *priv)
{
    struct target_reset_callback *entry;

    if (callback == NULL)
        return ERROR_COMMAND_SYNTAX_ERROR;

    entry = malloc(sizeof(struct target_reset_callback));
    if (entry == NULL) {
        LOG_ERROR("error allocating buffer for reset callback entry");
        return ERROR_COMMAND_SYNTAX_ERROR;
    }

    entry->callback = callback;
    entry->priv = priv;
    list_add(&entry->list, &target_reset_callback_list);


    return ERROR_OK;
}

int target_register_trace_callback(int (*callback)(struct target *target,
        size_t len, uint8_t *data, void *priv), void *priv)
{
    struct target_trace_callback *entry;

    if (callback == NULL)
        return ERROR_COMMAND_SYNTAX_ERROR;

    entry = malloc(sizeof(struct target_trace_callback));
    if (entry == NULL) {
        LOG_ERROR("error allocating buffer for trace callback entry");
        return ERROR_COMMAND_SYNTAX_ERROR;
    }

    entry->callback = callback;
    entry->priv = priv;
    list_add(&entry->list, &target_trace_callback_list);


    return ERROR_OK;
}

int target_register_timer_callback(int (*callback)(void *priv),
        unsigned int time_ms, enum target_timer_type type, void *priv)
{
    struct target_timer_callback **callbacks_p = &target_timer_callbacks;

    if (callback == NULL)
        return ERROR_COMMAND_SYNTAX_ERROR;

    if (*callbacks_p) {
        while ((*callbacks_p)->next)
            callbacks_p = &((*callbacks_p)->next);
        callbacks_p = &((*callbacks_p)->next);
    }

    (*callbacks_p) = malloc(sizeof(struct target_timer_callback));
    (*callbacks_p)->callback = callback;
    (*callbacks_p)->type = type;
    (*callbacks_p)->time_ms = time_ms;
    (*callbacks_p)->removed = false;

    gettimeofday(&(*callbacks_p)->when, NULL);
    timeval_add_time(&(*callbacks_p)->when, 0, time_ms * 1000);

    (*callbacks_p)->priv = priv;
    (*callbacks_p)->next = NULL;

    return ERROR_OK;
}

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_COMMAND_SYNTAX_ERROR;

    while (c) {
        struct target_event_callback *next = c->next;
        if ((c->callback == callback) && (c->priv == priv)) {
            *p = next;
            free(c);
            return ERROR_OK;
        } else
            p = &(c->next);
        c = next;
    }

    return ERROR_OK;
}

int target_unregister_reset_callback(int (*callback)(struct target *target,
        enum target_reset_mode reset_mode, void *priv), void *priv)
{
    struct target_reset_callback *entry;

    if (callback == NULL)
        return ERROR_COMMAND_SYNTAX_ERROR;

    list_for_each_entry(entry, &target_reset_callback_list, list) {
        if (entry->callback == callback && entry->priv == priv) {
            list_del(&entry->list);
            free(entry);
            break;
        }
    }

    return ERROR_OK;
}

int target_unregister_trace_callback(int (*callback)(struct target *target,
        size_t len, uint8_t *data, void *priv), void *priv)
{
    struct target_trace_callback *entry;

    if (callback == NULL)
        return ERROR_COMMAND_SYNTAX_ERROR;

    list_for_each_entry(entry, &target_trace_callback_list, list) {
        if (entry->callback == callback && entry->priv == priv) {
            list_del(&entry->list);
            free(entry);
            break;
        }
    }

    return ERROR_OK;
}

int target_unregister_timer_callback(int (*callback)(void *priv), void *priv)
{
    if (callback == NULL)
        return ERROR_COMMAND_SYNTAX_ERROR;

    for (struct target_timer_callback *c = target_timer_callbacks;
         c; c = c->next) {
        if ((c->callback == callback) && (c->priv == priv)) {
            c->removed = true;
            return ERROR_OK;
        }
    }

    return ERROR_FAIL;
}

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) {
        /* execute early halted first */
        target_call_event_callbacks(target, TARGET_EVENT_GDB_HALT);
    }

    LOG_DEBUG("target event %i (%s) for core %s", event,
            Jim_Nvp_value2name_simple(nvp_target_event, event)->name,
            target_name(target));

    target_handle_event(target, event);

    while (callback) {
        next_callback = callback->next;
        callback->callback(target, event, callback->priv);
        callback = next_callback;
    }

    return ERROR_OK;
}

int target_call_reset_callbacks(struct target *target, enum target_reset_mode reset_mode)
{
    struct target_reset_callback *callback;

    LOG_DEBUG("target reset %i (%s)", reset_mode,
            Jim_Nvp_value2name_simple(nvp_reset_modes, reset_mode)->name);

    list_for_each_entry(callback, &target_reset_callback_list, list)
        callback->callback(target, reset_mode, callback->priv);

    return ERROR_OK;
}

int target_call_trace_callbacks(struct target *target, size_t len, uint8_t *data)
{
    struct target_trace_callback *callback;

    list_for_each_entry(callback, &target_trace_callback_list, list)
        callback->callback(target, len, data, callback->priv);

    return ERROR_OK;
}

static int target_timer_callback_periodic_restart(
        struct target_timer_callback *cb, struct timeval *now)
{
    cb->when = *now;
    timeval_add_time(&cb->when, 0, cb->time_ms * 1000L);
    return ERROR_OK;
}

static int target_call_timer_callback(struct target_timer_callback *cb,
        struct timeval *now)
{
    cb->callback(cb->priv);

    if (cb->type == TARGET_TIMER_TYPE_PERIODIC)
        return target_timer_callback_periodic_restart(cb, now);

    return target_unregister_timer_callback(cb->callback, cb->priv);
}

static int target_call_timer_callbacks_check_time(int checktime)
{
    static bool callback_processing;

    /* Do not allow nesting */
    if (callback_processing)
        return ERROR_OK;

    callback_processing = true;

    keep_alive();

    struct timeval now;
    gettimeofday(&now, NULL);

    /* Store an address of the place containing a pointer to the
     * next item; initially, that's a standalone "root of the
     * list" variable. */
    struct target_timer_callback **callback = &target_timer_callbacks;
    while (callback && *callback) {
        if ((*callback)->removed) {
            struct target_timer_callback *p = *callback;
            *callback = (*callback)->next;
            free(p);
            continue;
        }

        bool call_it = (*callback)->callback &&
            ((!checktime && (*callback)->type == TARGET_TIMER_TYPE_PERIODIC) ||
             timeval_compare(&now, &(*callback)->when) >= 0);

        if (call_it)
            target_call_timer_callback(*callback, &now);

        callback = &(*callback)->next;
    }

    callback_processing = false;
    return ERROR_OK;
}

int target_call_timer_callbacks(void)
{
    return target_call_timer_callbacks_check_time(1);
}

/* invoke periodic callbacks immediately */
int target_call_timer_callbacks_now(void)
{
    return target_call_timer_callbacks_check_time(0);
}

/* 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 " TARGET_ADDR_FMT "-" TARGET_ADDR_FMT " (%" 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 */
        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;

    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;
            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 */
            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) {
        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 " TARGET_ADDR_FMT,
                    target->working_area_phys);
                target->working_area = target->working_area_phys;
            } else {
                LOG_ERROR("No working memory available. "
                    "Specify -work-area-phys to target.");
                return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
            }
        } else {
            if (target->working_area_virt_spec) {
                LOG_DEBUG("MMU enabled, using virtual "
                    "address for working memory " TARGET_ADDR_FMT,
                    target->working_area_virt);
                target->working_area = target->working_area_virt;
            } else {
                LOG_ERROR("No working memory available. "
                    "Specify -work-area-virt to target.");
                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)
        size = (size + 3) & (~3UL);

    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 (c == NULL)
        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;

    /* Split the working area into the requested size */
    target_split_working_area(c, size);

    LOG_DEBUG("allocated new working area of %" PRIu32 " bytes at address " TARGET_ADDR_FMT,
              size, c->address);

    if (target->backup_working_area) {
        if (c->backup == NULL) {
            c->backup = malloc(c->size);
            if (c->backup == NULL)
                return ERROR_FAIL;
        }

        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 */
    c->free = false;
    *area = c;

    /* user pointer */
    c->user = area;

    print_wa_layout(target);

    return ERROR_OK;
}

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 " TARGET_ADDR_FMT,
                    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 retval;

    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 = true;

    LOG_DEBUG("freed %" PRIu32 " bytes of working area at address " TARGET_ADDR_FMT,
            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;

    target_merge_working_areas(target);

    print_wa_layout(target);

    return retval;
}

int target_free_working_area(struct target *target, struct working_area *area)
{
    return target_free_working_area_restore(target, area, 1);
}

/* free resources and restore memory, if restoring memory fails,
 * free up resources anyway
 */
static void target_free_all_working_areas_restore(struct target *target, int restore)
{
    struct working_area *c = target->working_areas;

    LOG_DEBUG("freeing all working areas");

    /* 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;
    }

    /* 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)
{
    target_free_all_working_areas_restore(target, 1);

    /* Now we have none or only one working area marked as free */
    if (target->working_areas) {
        /* Free the last one to allow on-the-fly moving and resizing */
        free(target->working_areas->backup);
        free(target->working_areas);
        target->working_areas = NULL;
    }
}

/* Find the largest number of bytes that can be allocated */
uint32_t target_get_working_area_avail(struct target *target)
{
    struct working_area *c = target->working_areas;
    uint32_t max_size = 0;

    if (c == NULL)
        return target->working_area_size;

    while (c) {
        if (c->free && max_size < c->size)
            max_size = c->size;

        c = c->next;
    }

    return max_size;
}

static void target_destroy(struct target *target)
{
    if (target->type->deinit_target)
        target->type->deinit_target(target);

    free(target->semihosting);

    jtag_unregister_event_callback(jtag_enable_callback, target);

    struct target_event_action *teap = target->event_action;
    while (teap) {
        struct target_event_action *next = teap->next;
        Jim_DecrRefCount(teap->interp, teap->body);
        free(teap);
        teap = next;
    }

    target_free_all_working_areas(target);

    /* release the targets SMP list */
    if (target->smp) {
        struct target_list *head = target->head;
        while (head != NULL) {
            struct target_list *pos = head->next;
            head->target->smp = 0;
            free(head);
            head = pos;
        }
        target->smp = 0;
    }

    rtos_destroy(target);

    free(target->gdb_port_override);
    free(target->type);
    free(target->trace_info);
    free(target->fileio_info);
    free(target->cmd_name);
    free(target);
}

void target_quit(void)
{
    struct target_event_callback *pe = target_event_callbacks;
    while (pe) {
        struct target_event_callback *t = pe->next;
        free(pe);
        pe = t;
    }
    target_event_callbacks = NULL;

    struct target_timer_callback *pt = target_timer_callbacks;
    while (pt) {
        struct target_timer_callback *t = pt->next;
        free(pt);
        pt = t;
    }
    target_timer_callbacks = NULL;

    for (struct target *target = all_targets; target;) {
        struct target *tmp;

        tmp = target->next;
        target_destroy(target);
        target = tmp;
    }

    all_targets = NULL;
}

int target_arch_state(struct target *target)
{
    int retval;
    if (target == NULL) {
        LOG_WARNING("No target has been configured");
        return ERROR_OK;
    }

    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;
}

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 = buf_get_u32(reg->value, 0, 32);
            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) || timeval_compare(&now, &timeout) >= 0) {
            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, target_addr_t address, uint32_t size, const uint8_t *buffer)
{
    LOG_DEBUG("writing buffer of %" PRIu32 " byte at " TARGET_ADDR_FMT,
              size, address);

    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    if (size == 0)
        return ERROR_OK;

    if ((address + size - 1) < address) {
        /* GDB can request this when e.g. PC is 0xfffffffc */
        LOG_ERROR("address + size wrapped (" TARGET_ADDR_FMT ", 0x%08" PRIx32 ")",
                  address,
                  size);
        return ERROR_FAIL;
    }

    return target->type->write_buffer(target, address, size, buffer);
}

static int target_write_buffer_default(struct target *target,
    target_addr_t address, uint32_t count, const uint8_t *buffer)
{
    uint32_t size;

    /* 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;
        }
    }

    /* 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;
}

/* Single aligned words are guaranteed to use 16 or 32 bit access
 * mode respectively, otherwise data is handled as quickly as
 * possible
 */
int target_read_buffer(struct target *target, target_addr_t address, uint32_t size, uint8_t *buffer)
{
    LOG_DEBUG("reading buffer of %" PRIu32 " byte at " TARGET_ADDR_FMT,
              size, address);

    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    if (size == 0)
        return ERROR_OK;

    if ((address + size - 1) < address) {
        /* GDB can request this when e.g. PC is 0xfffffffc */
        LOG_ERROR("address + size wrapped (" TARGET_ADDR_FMT ", 0x%08" PRIx32 ")",
                  address,
                  size);
        return ERROR_FAIL;
    }

    return target->type->read_buffer(target, address, size, buffer);
}

static int target_read_buffer_default(struct target *target, target_addr_t address, uint32_t count, uint8_t *buffer)
{
    uint32_t size;

    /* 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;
        }
    }

    /* 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;
}

int target_checksum_memory(struct target *target, target_addr_t address, uint32_t size, uint32_t *crc)
{
    uint8_t *buffer;
    int retval;
    uint32_t i;
    uint32_t checksum = 0;
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    retval = target->type->checksum_memory(target, address, size, &checksum);
    if (retval != ERROR_OK) {
        buffer = malloc(size);
        if (buffer == NULL) {
            LOG_ERROR("error allocating buffer for section (%" PRIu32 " bytes)", size);
            return ERROR_COMMAND_SYNTAX_ERROR;
        }
        retval = target_read_buffer(target, address, size, buffer);
        if (retval != ERROR_OK) {
            free(buffer);
            return retval;
        }

        /* 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);
        }

        retval = image_calculate_checksum(buffer, size, &checksum);
        free(buffer);
    }

    *crc = checksum;

    return retval;
}

int target_blank_check_memory(struct target *target,
    struct target_memory_check_block *blocks, int num_blocks,
    uint8_t erased_value)
{
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    if (target->type->blank_check_memory == NULL)
        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;

    return target->type->blank_check_memory(target, blocks, num_blocks, erased_value);
}

int target_read_u64(struct target *target, target_addr_t address, uint64_t *value)
{
    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: " TARGET_ADDR_FMT ", value: 0x%16.16" PRIx64 "",
                  address,
                  *value);
    } else {
        *value = 0x0;
        LOG_DEBUG("address: " TARGET_ADDR_FMT " failed",
                  address);
    }

    return retval;
}

int target_read_u32(struct target *target, target_addr_t address, uint32_t *value)
{
    uint8_t value_buf[4];
    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) {
        *value = target_buffer_get_u32(target, value_buf);
        LOG_DEBUG("address: " TARGET_ADDR_FMT ", value: 0x%8.8" PRIx32 "",
                  address,
                  *value);
    } else {
        *value = 0x0;
        LOG_DEBUG("address: " TARGET_ADDR_FMT " failed",
                  address);
    }

    return retval;
}

int target_read_u16(struct target *target, target_addr_t address, uint16_t *value)
{
    uint8_t value_buf[2];
    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) {
        *value = target_buffer_get_u16(target, value_buf);
        LOG_DEBUG("address: " TARGET_ADDR_FMT ", value: 0x%4.4" PRIx16,
                  address,
                  *value);
    } else {
        *value = 0x0;
        LOG_DEBUG("address: " TARGET_ADDR_FMT " failed",
                  address);
    }

    return retval;
}

int target_read_u8(struct target *target, target_addr_t address, uint8_t *value)
{
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    int retval = target_read_memory(target, address, 1, 1, value);

    if (retval == ERROR_OK) {
        LOG_DEBUG("address: " TARGET_ADDR_FMT ", value: 0x%2.2" PRIx8,
                  address,
                  *value);
    } else {
        *value = 0x0;
        LOG_DEBUG("address: " TARGET_ADDR_FMT " failed",
                  address);
    }

    return retval;
}

int target_write_u64(struct target *target, target_addr_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: " TARGET_ADDR_FMT ", 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, target_addr_t address, uint32_t value)
{
    int retval;
    uint8_t value_buf[4];
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    LOG_DEBUG("address: " TARGET_ADDR_FMT ", value: 0x%8.8" PRIx32 "",
              address,
              value);

    target_buffer_set_u32(target, value_buf, value);
    retval = target_write_memory(target, address, 4, 1, value_buf);
    if (retval != ERROR_OK)
        LOG_DEBUG("failed: %i", retval);

    return retval;
}

int target_write_u16(struct target *target, target_addr_t address, uint16_t value)
{
    int retval;
    uint8_t value_buf[2];
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    LOG_DEBUG("address: " TARGET_ADDR_FMT ", value: 0x%8.8" PRIx16,
              address,
              value);

    target_buffer_set_u16(target, value_buf, value);
    retval = target_write_memory(target, address, 2, 1, value_buf);
    if (retval != ERROR_OK)
        LOG_DEBUG("failed: %i", retval);

    return retval;
}

int target_write_u8(struct target *target, target_addr_t address, uint8_t value)
{
    int retval;
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    LOG_DEBUG("address: " TARGET_ADDR_FMT ", value: 0x%2.2" PRIx8,
              address, value);

    retval = target_write_memory(target, address, 1, 1, &value);
    if (retval != ERROR_OK)
        LOG_DEBUG("failed: %i", retval);

    return retval;
}

int target_write_phys_u64(struct target *target, target_addr_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: " TARGET_ADDR_FMT ", value: 0x%16.16" PRIx64 "",
              address,
              value);

    target_buffer_set_u64(target, value_buf, value);
    retval = target_write_phys_memory(target, address, 8, 1, value_buf);
    if (retval != ERROR_OK)
        LOG_DEBUG("failed: %i", retval);

    return retval;
}

int target_write_phys_u32(struct target *target, target_addr_t address, uint32_t value)
{
    int retval;
    uint8_t value_buf[4];
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    LOG_DEBUG("address: " TARGET_ADDR_FMT ", value: 0x%8.8" PRIx32 "",
              address,
              value);

    target_buffer_set_u32(target, value_buf, value);
    retval = target_write_phys_memory(target, address, 4, 1, value_buf);
    if (retval != ERROR_OK)
        LOG_DEBUG("failed: %i", retval);

    return retval;
}

int target_write_phys_u16(struct target *target, target_addr_t address, uint16_t value)
{
    int retval;
    uint8_t value_buf[2];
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    LOG_DEBUG("address: " TARGET_ADDR_FMT ", value: 0x%8.8" PRIx16,
              address,
              value);

    target_buffer_set_u16(target, value_buf, value);
    retval = target_write_phys_memory(target, address, 2, 1, value_buf);
    if (retval != ERROR_OK)
        LOG_DEBUG("failed: %i", retval);

    return retval;
}

int target_write_phys_u8(struct target *target, target_addr_t address, uint8_t value)
{
    int retval;
    if (!target_was_examined(target)) {
        LOG_ERROR("Target not examined yet");
        return ERROR_FAIL;
    }

    LOG_DEBUG("address: " TARGET_ADDR_FMT ", value: 0x%2.2" PRIx8,
              address, value);

    retval = target_write_phys_memory(target, address, 1, 1, &value);
    if (retval != ERROR_OK)
        LOG_DEBUG("failed: %i", retval);

    return retval;
}

static int find_target(struct command_invocation *cmd, const char *name)
{
    struct target *target = get_target(name);
    if (target == NULL) {
        command_print(cmd, "Target: %s is unknown, try one of:\n", name);
        return ERROR_FAIL;
    }
    if (!target->tap->enabled) {
        command_print(cmd, "Target: TAP %s is disabled, "
             "can't be the current target\n",
             target->tap->dotted_name);
        return ERROR_FAIL;
    }

    cmd->ctx->current_target = target;
    if (cmd->ctx->current_target_override)
        cmd->ctx->current_target_override = target;

    return ERROR_OK;
}


COMMAND_HANDLER(handle_targets_command)
{
    int retval = ERROR_OK;
    if (CMD_ARGC == 1) {
        retval = find_target(CMD, CMD_ARGV[0]);
        if (retval == ERROR_OK) {
            /* we're done! */
            return retval;
        }
    }

    struct target *target = all_targets;
    command_print(CMD, "    TargetName         Type       Endian TapName            State       ");
    command_print(CMD, "--  ------------------ ---------- ------ ------------------ ------------");
    while (target) {
        const char *state;
        char marker = ' ';

        if (target->tap->enabled)
            state = target_state_name(target);
        else
            state = "tap-disabled";

        if (CMD_CTX->current_target == target)
            marker = '*';

        /* keep columns lined up to match the headers above */
        command_print(CMD,
                "%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 retval;
}

/* every 300ms we check for reset & powerdropout and issue a "reset halt" if so. */

static int powerDropout;
static int srstAsserted;

static int runPowerRestore;
static int runPowerDropout;
static int runSrstAsserted;
static int runSrstDeasserted;

static int sense_handler(void)
{
    static int prevSrstAsserted;
    static int prevPowerdropout;

    int retval = jtag_power_dropout(&powerDropout);
    if (retval != ERROR_OK)
        return retval;

    int powerRestored;
    powerRestored = prevPowerdropout && !powerDropout;
    if (powerRestored)
        runPowerRestore = 1;

    int64_t current = timeval_ms();
    static int64_t lastPower;
    bool waitMore = lastPower + 2000 > current;
    if (powerDropout && !waitMore) {
        runPowerDropout = 1;
        lastPower = current;
    }

    retval = jtag_srst_asserted(&srstAsserted);
    if (retval != ERROR_OK)
        return retval;

    int srstDeasserted;
    srstDeasserted = prevSrstAsserted && !srstAsserted;

    static int64_t lastSrst;
    waitMore = lastSrst + 2000 > current;
    if (srstDeasserted && !waitMore) {
        runSrstDeasserted = 1;
        lastSrst = current;
    }

    if (!prevSrstAsserted && srstAsserted)
        runSrstAsserted = 1;

    prevSrstAsserted = srstAsserted;
    prevPowerdropout = powerDropout;

    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.
         */
    }

    return ERROR_OK;
}

/* process target state changes */
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;
    if (!recursive) {
        recursive = 1;
        sense_handler();
        /* danger! running these procedures can trigger srst assertions and power dropouts.
         * We need to avoid an infinite loop/recursion here and we do that by
         * clearing the flags after running these events.
         */
        int did_something = 0;
        if (runSrstAsserted) {
            LOG_INFO("srst asserted detected, running srst_asserted proc.");
            Jim_Eval(interp, "srst_asserted");
            did_something = 1;
        }
        if (runSrstDeasserted) {
            Jim_Eval(interp, "srst_deasserted");
            did_something = 1;
        }
        if (runPowerDropout) {
            LOG_INFO("Power dropout detected, running power_dropout proc.");
            Jim_Eval(interp, "power_dropout");
            did_something = 1;
        }
        if (runPowerRestore) {
            Jim_Eval(interp, "power_restore");
            did_something = 1;
        }

        if (did_something) {
            /* clear detect flags */
            sense_handler();
        }

        /* clear action flags */

        runSrstAsserted = 0;
        runSrstDeasserted = 0;
        runPowerRestore = 0;
        runPowerDropout = 0;

        recursive = 0;
    }

    /* Poll targets for state changes unless that's globally disabled.
     * Skip targets that are currently disabled.
     */
    for (struct target *target = all_targets;
            is_jtag_poll_safe() && target;
            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) {
            /* polling may fail silently until the target has been examined */
            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++;
                }

                /* 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);
            }
            if (target->backoff.times > 0) {
                LOG_USER("Polling target %s failed, 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;
                    LOG_USER("Examination failed, GDB will be halted. Polling again in %dms",
                         target->backoff.times * polling_interval);
                    return retval;
                }
            }

            /* Since we succeeded, we reset backoff count */
            target->backoff.times = 0;
        }
    }

    return retval;
}

COMMAND_HANDLER(handle_reg_command)
{
    struct target *target;
    struct reg *reg = NULL;
    unsigned count = 0;
    char *value;

    LOG_DEBUG("-");

    target = get_current_target(CMD_CTX);

    /* list all available registers for the current target */
    if (CMD_ARGC == 0) {
        struct reg_cache *cache = target->reg_cache;

        count = 0;
        while (cache) {
            unsigned i;

            command_print(CMD, "===== %s", cache->name);

            for (i = 0, reg = cache->reg_list;
                    i < cache->num_regs;
                    i++, reg++, count++) {
                if (reg->exist == false || reg->hidden)
                    continue;
                /* only print cached values if they are valid */
                if (reg->valid) {
                    value = buf_to_hex_str(reg->value,
                            reg->size);
                    command_print(CMD,
                            "(%i) %s (/%" PRIu32 "): 0x%s%s",
                            count, reg->name,
                            reg->size, value,
                            reg->dirty
                                ? " (dirty)"
                                : "");
                    free(value);
                } else {
                    command_print(CMD, "(%i) %s (/%" PRIu32 ")",
                              count, reg->name,
                              reg->size);
                }
            }
            cache = cache->next;
        }

        return ERROR_OK;
    }

    /* access a single register by its ordinal number */
    if ((CMD_ARGV[0][0] >= '0') && (CMD_ARGV[0][0] <= '9')) {
        unsigned num;
        COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], num);

        struct reg_cache *cache = target->reg_cache;
        count = 0;
        while (cache) {
            unsigned i;
            for (i = 0; i < cache->num_regs; i++) {
                if (count++ == num) {
                    reg = &cache->reg_list[i];
                    break;
                }
            }
            if (reg)
                break;
            cache = cache->next;
        }

        if (!reg) {
            command_print(CMD, "%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, CMD_ARGV[0], 1);

        if (!reg)
            goto not_found;
    }

    assert(reg != NULL); /* give clang a hint that we *know* reg is != NULL here */

    if (!reg->exist)
        goto not_found;

    /* display a register */
    if ((CMD_ARGC == 1) || ((CMD_ARGC == 2) && !((CMD_ARGV[1][0] >= '0')
            && (CMD_ARGV[1][0] <= '9')))) {
        if ((CMD_ARGC == 2) && (strcmp(CMD_ARGV[1], "force") == 0))
            reg->valid = 0;

        if (reg->valid == 0)
            reg->type->get(reg);
        value = buf_to_hex_str(reg->value, reg->size);
        command_print(CMD, "%s (/%i): 0x%s", reg->name, (int)(reg->size), value);
        free(value);
        return ERROR_OK;
    }

    /* set register value */
    if (CMD_ARGC == 2) {
        uint8_t *buf = malloc(DIV_ROUND_UP(reg->size, 8));
        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_hex_str(reg->value, reg->size);
        command_print(CMD, "%s (/%i): 0x%s", reg->name, (int)(reg->size), value);
        free(value);

        free(buf);

        return ERROR_OK;
    }

    return ERROR_COMMAND_SYNTAX_ERROR;

not_found:
    command_print(CMD, "register %s not found in current target", CMD_ARGV[0]);
    return ERROR_OK;
}

COMMAND_HANDLER(handle_poll_command)
{
    int retval = ERROR_OK;
    struct target *target = get_current_target(CMD_CTX);

    if (CMD_ARGC == 0) {
        command_print(CMD, "background polling: %s",
                jtag_poll_get_enabled() ? "on" : "off");
        command_print(CMD, "TAP: %s (%s)",
                target->tap->dotted_name,
                target->tap->enabled ? "enabled" : "disabled");
        if (!target->tap->enabled)
            return ERROR_OK;
        retval = target_poll(target);
        if (retval != ERROR_OK)
            return retval;
        retval = target_arch_state(target);
        if (retval != ERROR_OK)
            return retval;
    } 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;
}

COMMAND_HANDLER(handle_wait_halt_command)
{
    if (CMD_ARGC > 1)
        return ERROR_COMMAND_SYNTAX_ERROR;

    unsigned ms = DEFAULT_HALT_TIMEOUT;
    if (1 == CMD_ARGC) {
        int retval = parse_uint(CMD_ARGV[0], &ms);
        if (ERROR_OK != retval)
            return ERROR_COMMAND_SYNTAX_ERROR;
    }

    struct target *target = get_current_target(CMD_CTX);
    return target_wait_state(target, TARGET_HALTED, ms);
}

/* wait for target state to change. The trick here is to have a low
 * latency for short waits and not to suck up all the CPU time
 * on longer waits.
 *
 * After 500ms, keep_alive() is invoked
 */
int target_wait_state(struct target *target, enum target_state state, int ms)
{
    int retval;
    int64_t then = 0, cur;
    bool once = true;

    for (;;) {
        retval = target_poll(target);
        if (retval != ERROR_OK)
            return retval;
        if (target->state == state)
            break;
        cur = timeval_ms();
        if (once) {
            once = false;
            then = timeval_ms();
            LOG_DEBUG("waiting for target %s...",
                Jim_Nvp_value2name_simple(nvp_target_state, state)->name);
        }

        if (cur-then > 500)
            keep_alive();

        if ((cur-then) > ms) {
            LOG_ERROR("timed out while waiting for target %s",
                Jim_Nvp_value2name_simple(nvp_target_state, state)->name);
            return ERROR_FAIL;
        }
    }

    return ERROR_OK;
}

COMMAND_HANDLER(handle_halt_command)
{
    LOG_DEBUG("-");

    struct target *target = get_current_target(CMD_CTX);

    target->verbose_halt_msg = true;

    int retval = target_halt(target);
    if (ERROR_OK != retval)
        return retval;

    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_local)
            return ERROR_OK;
    }

    return CALL_COMMAND_HANDLER(handle_wait_halt_command);
}

COMMAND_HANDLER(handle_soft_reset_halt_command)
{
    struct target *target = get_current_target(CMD_CTX);

    LOG_USER("requesting target halt and executing a soft reset");

    target_soft_reset_halt(target);

    return ERROR_OK;
}

COMMAND_HANDLER(handle_reset_command)
{
    if (CMD_ARGC > 1)
        return ERROR_COMMAND_SYNTAX_ERROR;

    enum target_reset_mode reset_mode = RESET_RUN;
    if (CMD_ARGC == 1) {
        const Jim_Nvp *n;
        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, reset_mode);
}


COMMAND_HANDLER(handle_resume_command)
{
    int current = 1;
    if (CMD_ARGC > 1)
        return ERROR_COMMAND_SYNTAX_ERROR;

    struct target *target = get_current_target(CMD_CTX);

    /* with no CMD_ARGV, resume from current pc, addr = 0,
     * with one arguments, addr = CMD_ARGV[0],
     * handle breakpoints, not debugging */
    target_addr_t addr = 0;
    if (CMD_ARGC == 1) {
        COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);
        current = 0;
    }

    return target_resume(target, current, addr, 1, 0);
}

COMMAND_HANDLER(handle_step_command)
{
    if (CMD_ARGC > 1)
        return ERROR_COMMAND_SYNTAX_ERROR;

    LOG_DEBUG("-");

    /* with no CMD_ARGV, step from current pc, addr = 0,
     * with one argument addr = CMD_ARGV[0],
     * handle breakpoints, debugging */
    target_addr_t addr = 0;
    int current_pc = 1;
    if (CMD_ARGC == 1) {
        COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);
        current_pc = 0;
    }

    struct target *target = get_current_target(CMD_CTX);

    return target_step(target, current_pc, addr, 1);
}

void target_handle_md_output(struct command_invocation *cmd,
        struct target *target, target_addr_t address, unsigned size,
        unsigned count, const uint8_t *buffer)
{
    const unsigned line_bytecnt = 32;
    unsigned line_modulo = line_bytecnt / size;

    char output[line_bytecnt * 4 + 1];
    unsigned output_len = 0;

    const char *value_fmt;
    switch (size) {
    case 8:
        value_fmt = "%16.16"PRIx64" ";
        break;
    case 4:
        value_fmt = "%8.8"PRIx64" ";
        break;
    case 2:
        value_fmt = "%4.4"PRIx64" ";
        break;
    case 1:
        value_fmt = "%2.2"PRIx64" ";
        break;
    default:
        /* "can't happen", caller checked */
        LOG_ERROR("invalid memory read size: %u", size);
        return;
    }

    for (unsigned i = 0; i < count; i++) {
        if (i % line_modulo == 0) {
            output_len += snprintf(output + output_len,
                    sizeof(output) - output_len,
                    TARGET_ADDR_FMT ": ",
                    (address + (i * size)));
        }

        uint64_t value = 0;
        const uint8_t *value_ptr = buffer + i * size;
        switch (size) {
        case 8:
            value = target_buffer_get_u64(target, value_ptr);
            break;
        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)) {
            command_print(cmd, "%s", output);
            output_len = 0;
        }
    }
}

COMMAND_HANDLER(handle_md_command)
{
    if (CMD_ARGC < 1)
        return ERROR_COMMAND_SYNTAX_ERROR;

    unsigned size = 0;
    switch (CMD_NAME[2]) {
    case 'd':
        size = 8;
        break;
    case 'w':
        size = 4;
        break;
    case 'h':
        size = 2;
        break;
    case 'b':
        size = 1;
        break;
    default:
        return ERROR_COMMAND_SYNTAX_ERROR;
    }

    bool physical = strcmp(CMD_ARGV[0], "phys") == 0;
    int (*fn)(struct target *target,
            target_addr_t address, uint32_t size_value, uint32_t count, uint8_t *buffer);
    if (physical) {
        CMD_ARGC--;
        CMD_ARGV++;
        fn = target_read_phys_memory;
    } else
        fn = target_read_memory;
    if ((CMD_ARGC < 1) || (CMD_ARGC > 2))
        return ERROR_COMMAND_SYNTAX_ERROR;

    target_addr_t address;
    COMMAND_PARSE_ADDRESS(CMD_ARGV[0], address);

    unsigned count = 1;
    if (CMD_ARGC == 2)
        COMMAND_PARSE_NUMBER(uint, CMD_ARGV[1], count);

    uint8_t *buffer = calloc(count, size);
    if (buffer == NULL) {
        LOG_ERROR("Failed to allocate md read buffer");
        return ERROR_FAIL;
    }

    struct target *target = get_current_target(CMD_CTX);
    int retval = fn(target, address, size, count, buffer);
    if (ERROR_OK == retval)
        target_handle_md_output(CMD, target, address, size, count, buffer);

    free(buffer);

    return retval;
}

typedef int (*target_write_fn)(struct target *target,
        target_addr_t address, uint32_t size, uint32_t count, const uint8_t *buffer);

static int target_fill_mem(struct target *target,
        target_addr_t address,
        target_write_fn fn,
        unsigned data_size,
        /* value */
        uint64_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 8:
            target_buffer_set_u64(target, target_buf + i * data_size, b);
            break;
        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(CMD_ARGV[0], "phys") == 0;
    target_write_fn fn;
    if (physical) {
        CMD_ARGC--;
        CMD_ARGV++;
        fn = target_write_phys_memory;
    } else
        fn = target_write_memory;
    if ((CMD_ARGC < 2) || (CMD_ARGC > 3))
        return ERROR_COMMAND_SYNTAX_ERROR;

    target_addr_t address;
    COMMAND_PARSE_ADDRESS(CMD_ARGV[0], address);

    uint64_t value;
    COMMAND_PARSE_NUMBER(u64, CMD_ARGV[1], value);

    unsigned count = 1;
    if (CMD_ARGC == 3)
        COMMAND_PARSE_NUMBER(uint, CMD_ARGV[2], count);

    struct target *target = get_current_target(CMD_CTX);
    unsigned wordsize;
    switch (CMD_NAME[2]) {
        case 'd':
            wordsize = 8;
            break;
        case 'w':
            wordsize = 4;
            break;
        case 'h':
            wordsize = 2;
            break;
        case 'b':
            wordsize = 1;
            break;
        default:
            return ERROR_COMMAND_SYNTAX_ERROR;
    }

    return target_fill_mem(target, address, fn, wordsize, value, count);
}

static COMMAND_HELPER(parse_load_image_command_CMD_ARGV, struct image *image,
        target_addr_t *min_address, target_addr_t *max_address)
{
    if (CMD_ARGC < 1 || CMD_ARGC > 5)
        return ERROR_COMMAND_SYNTAX_ERROR;

    /* a base address isn't always necessary,
     * default to 0x0 (i.e. don't relocate) */
    if (CMD_ARGC >= 2) {
        target_addr_t addr;
        COMMAND_PARSE_ADDRESS(CMD_ARGV[1], addr);
        image->base_address = addr;
        image->base_address_set = true;
    } else
        image->base_address_set = false;

    image->start_address_set = false;

    if (CMD_ARGC >= 4)
        COMMAND_PARSE_ADDRESS(CMD_ARGV[3], *min_address);
    if (CMD_ARGC == 5) {
        COMMAND_PARSE_ADDRESS(CMD_ARGV[4], *max_address);
        /* use size (given) to find max (required) */
        *max_address += *min_address;
    }

    if (*min_address > *max_address)
        return ERROR_COMMAND_SYNTAX_ERROR;

    return ERROR_OK;
}

COMMAND_HANDLER(handle_load_image_command)
{
    uint8_t *buffer;
    size_t buf_cnt;
    uint32_t image_size;
    target_addr_t min_address = 0;
    target_addr_t max_address = -1;
    struct image image;

    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 duration bench;
    duration_start(&bench);

    if (image_open(&image, CMD_ARGV[0], (CMD_ARGC >= 3) ? CMD_ARGV[2] : NULL) != ERROR_OK)
        return ERROR_FAIL;

    image_size = 0x0;
    retval = ERROR_OK;
    for (unsigned int i = 0; i < image.num_sections; i++) {
        buffer = malloc(image.sections[i].size);
        if (buffer == NULL) {
            command_print(CMD,
                          "error allocating buffer for section (%d bytes)",
                          (int)(image.sections[i].size));
            retval = ERROR_FAIL;
            break;
        }

        retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt);
        if (retval != ERROR_OK) {
            free(buffer);
            break;
        }

        uint32_t offset = 0;
        uint32_t length = buf_cnt;

        /* DANGER!!! beware of unsigned comparison 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) {
                /* 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;

            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, "%u bytes written at address " TARGET_ADDR_FMT "",
                    (unsigned int)length,
                    image.sections[i].base_address + offset);
        }

        free(buffer);
    }

    if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
        command_print(CMD, "downloaded %" PRIu32 " bytes "
                "in %fs (%0.3f KiB/s)", image_size,
                duration_elapsed(&bench), duration_kbps(&bench, image_size));
    }

    image_close(&image);

    return retval;

}

COMMAND_HANDLER(handle_dump_image_command)
{
    struct fileio *fileio;
    uint8_t *buffer;
    int retval, retvaltemp;
    target_addr_t address, size;
    struct duration bench;
    struct target *target = get_current_target(CMD_CTX);

    if (CMD_ARGC != 3)
        return ERROR_COMMAND_SYNTAX_ERROR;

    COMMAND_PARSE_ADDRESS(CMD_ARGV[1], address);
    COMMAND_PARSE_ADDRESS(CMD_ARGV[2], size);

    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;
    }

    duration_start(&bench);

    while (size > 0) {
        size_t size_written;
        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;
    }

    free(buffer);

    if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
        size_t filesize;
        retval = fileio_size(fileio, &filesize);
        if (retval != ERROR_OK)
            return retval;
        command_print(CMD,
                "dumped %zu bytes in %fs (%0.3f KiB/s)", filesize,
                duration_elapsed(&bench), duration_kbps(&bench, filesize));
    }

    retvaltemp = fileio_close(fileio);
    if (retvaltemp != ERROR_OK)
        return retvaltemp;

    return retval;
}

enum verify_mode {
    IMAGE_TEST = 0,
    IMAGE_VERIFY = 1,
    IMAGE_CHECKSUM_ONLY = 2
};

static COMMAND_HELPER(handle_verify_image_command_internal, enum verify_mode verify)
{
    uint8_t *buffer;
    size_t buf_cnt;
    uint32_t image_size;
    int retval;
    uint32_t checksum = 0;
    uint32_t mem_checksum = 0;

    struct image image;

    struct target *target = get_current_target(CMD_CTX);

    if (CMD_ARGC < 1)
        return ERROR_COMMAND_SYNTAX_ERROR;

    if (!target) {
        LOG_ERROR("no target selected");
        return ERROR_FAIL;
    }

    struct duration bench;
    duration_start(&bench);

    if (CMD_ARGC >= 2) {
        target_addr_t addr;
        COMMAND_PARSE_ADDRESS(CMD_ARGV[1], addr);
        image.base_address = addr;
        image.base_address_set = true;
    } else {
        image.base_address_set = false;
        image.base_address = 0x0;
    }

    image.start_address_set = false;

    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 (unsigned int i = 0; i < image.num_sections; i++) {
        buffer = malloc(image.sections[i].size);
        if (buffer == NULL) {
            command_print(CMD,
                    "error allocating buffer for section (%" PRIu32 " bytes)",
                    image.sections[i].size);
            break;
        }
        retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt);
        if (retval != ERROR_OK) {
            free(buffer);
            break;
        }

        if (verify >= IMAGE_VERIFY) {
            /* calculate checksum of image */
            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) {
                free(buffer);
                break;
            }
            if ((checksum != mem_checksum) && (verify == IMAGE_CHECKSUM_ONLY)) {
                LOG_ERROR("checksum mismatch");
                free(buffer);
                retval = ERROR_FAIL;
                goto done;
            }
            if (checksum != mem_checksum) {
                /* failed crc checksum, fall back to a binary compare */
                uint8_t *data;

                if (diffs == 0)
                    LOG_ERROR("checksum mismatch - attempting binary compare");

                data = malloc(buf_cnt);

                retval = target_read_buffer(target, image.sections[i].base_address, buf_cnt, data);
                if (retval == ERROR_OK) {
                    uint32_t t;
                    for (t = 0; t < buf_cnt; t++) {
                        if (data[t] != buffer[t]) {
                            command_print(CMD,
                                          "diff %d address 0x%08x. Was 0x%02x instead of 0x%02x",
                                          diffs,
                                          (unsigned)(t + image.sections[i].base_address),
                                          data[t],
                                          buffer[t]);
                            if (diffs++ >= 127) {
                                command_print(CMD, "More than 128 errors, the rest are not printed.");
                                free(data);
                                free(buffer);
                                goto done;
                            }
                        }
                        keep_alive();
                    }
                }
                free(data);
            }
        } else {
            command_print(CMD, "address " TARGET_ADDR_FMT " length 0x%08zx",
                          image.sections[i].base_address,
                          buf_cnt);
        }

        free(buffer);
        image_size += buf_cnt;
    }
    if (diffs > 0)
        command_print(CMD, "No more differences found.");
done:
    if (diffs > 0)
        retval = ERROR_FAIL;
    if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
        command_print(CMD, "verified %" PRIu32 " bytes "
                "in %fs (%0.3f KiB/s)", image_size,
                duration_elapsed(&bench), duration_kbps(&bench, image_size));
    }

    image_close(&image);

    return retval;
}

COMMAND_HANDLER(handle_verify_image_checksum_command)
{
    return CALL_COMMAND_HANDLER(handle_verify_image_command_internal, IMAGE_CHECKSUM_ONLY);
}

COMMAND_HANDLER(handle_verify_image_command)
{
    return CALL_COMMAND_HANDLER(handle_verify_image_command_internal, IMAGE_VERIFY);
}

COMMAND_HANDLER(handle_test_image_command)
{
    return CALL_COMMAND_HANDLER(handle_verify_image_command_internal, IMAGE_TEST);
}

static int handle_bp_command_list(struct command_invocation *cmd)
{
    struct target *target = get_current_target(cmd->ctx);
    struct breakpoint *breakpoint = target->breakpoints;
    while (breakpoint) {
        if (breakpoint->type == BKPT_SOFT) {
            char *buf = buf_to_hex_str(breakpoint->orig_instr,
                    breakpoint->length);
            command_print(cmd, "IVA breakpoint: " TARGET_ADDR_FMT ", 0x%x, %i, 0x%s",
                    breakpoint->address,
                    breakpoint->length,
                    breakpoint->set, buf);
            free(buf);
        } else {
            if ((breakpoint->address == 0) && (breakpoint->asid != 0))
                command_print(cmd, "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, "Hybrid breakpoint(IVA): " TARGET_ADDR_FMT ", 0x%x, %i",
                            breakpoint->address,
                            breakpoint->length, breakpoint->set);
                command_print(cmd, "\t|--->linked with ContextID: 0x%8.8" PRIx32,
                            breakpoint->asid);
            } else
                command_print(cmd, "Breakpoint(IVA): " TARGET_ADDR_FMT ", 0x%x, %i",
                            breakpoint->address,
                            breakpoint->length, breakpoint->set);
        }

        breakpoint = breakpoint->next;
    }
    return ERROR_OK;
}

static int handle_bp_command_set(struct command_invocation *cmd,
        target_addr_t addr, uint32_t asid, uint32_t length, int hw)
{
    struct target *target = get_current_target(cmd->ctx);
    int retval;

    if (asid == 0) {
        retval = breakpoint_add(target, addr, length, hw);
        /* error is always logged in breakpoint_add(), do not print it again */
        if (ERROR_OK == retval)
            command_print(cmd, "breakpoint set at " TARGET_ADDR_FMT "", addr);

    } else if (addr == 0) {
        if (target->type->add_context_breakpoint == NULL) {
            LOG_ERROR("Context breakpoint not available");
            return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
        }
        retval = context_breakpoint_add(target, asid, length, hw);
        /* error is always logged in context_breakpoint_add(), do not print it again */
        if (ERROR_OK == retval)
            command_print(cmd, "Context breakpoint set at 0x%8.8" PRIx32 "", asid);

    } else {
        if (target->type->add_hybrid_breakpoint == NULL) {
            LOG_ERROR("Hybrid breakpoint not available");
            return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
        }
        retval = hybrid_breakpoint_add(target, addr, asid, length, hw);
        /* error is always logged in hybrid_breakpoint_add(), do not print it again */
        if (ERROR_OK == retval)
            command_print(cmd, "Hybrid breakpoint set at 0x%8.8" PRIx32 "", asid);
    }
    return retval;
}

COMMAND_HANDLER(handle_bp_command)
{
    target_addr_t addr;
    uint32_t asid;
    uint32_t length;
    int hw = BKPT_SOFT;

    switch (CMD_ARGC) {
        case 0:
            return handle_bp_command_list(CMD);

        case 2:
            asid = 0;
            COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);
            COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], length);
            return handle_bp_command_set(CMD, addr, asid, length, hw);

        case 3:
            if (strcmp(CMD_ARGV[2], "hw") == 0) {
                hw = BKPT_HARD;
                COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);
                COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], length);
                asid = 0;
                return handle_bp_command_set(CMD, 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, addr, asid, length, hw);
            }
            /* fallthrough */
        case 4:
            hw = BKPT_HARD;
            COMMAND_PARSE_ADDRESS(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, addr, asid, length, hw);

        default:
            return ERROR_COMMAND_SYNTAX_ERROR;
    }
}

COMMAND_HANDLER(handle_rbp_command)
{
    if (CMD_ARGC != 1)
        return ERROR_COMMAND_SYNTAX_ERROR;

    struct target *target = get_current_target(CMD_CTX);

    if (!strcmp(CMD_ARGV[0], "all")) {
        breakpoint_remove_all(target);
    } else {
        target_addr_t addr;
        COMMAND_PARSE_ADDRESS(CMD_ARGV[0], addr);

        breakpoint_remove(target, addr);
    }

    return ERROR_OK;
}

COMMAND_HANDLER(handle_wp_command)
{
    struct target *target = get_current_target(CMD_CTX);

    if (CMD_ARGC == 0) {
        struct watchpoint *watchpoint = target->watchpoints;

        while (watchpoint) {
            command_print(CMD, "address: " TARGET_ADDR_FMT
                    ", len: 0x%8.8" PRIx32
                    ", r/w/a: %i, value: 0x%8.8" PRIx32
                    ", mask: 0x%8.8" PRIx32,
                    watchpoint->address,
                    watchpoint->length,
                    (int)watchpoint->rw,
                    watchpoint->value,
                    watchpoint->mask);
            watchpoint = watchpoint->next;
        }
        return ERROR_OK;
    }

    enum watchpoint_rw type = WPT_ACCESS;
    uint32_t addr = 0;
    uint32_t length = 0;
    uint32_t data_value = 0x0;
    uint32_t data_mask = 0xffffffff;

    switch (CMD_ARGC) {
    case 5:
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[4], data_mask);
        /* fall through */
    case 4:
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[3], data_value);
        /* fall through */
    case 3:
        switch (CMD_ARGV[2][0]) {
        case 'r':
            type = WPT_READ;
            break;
        case 'w':
            type = WPT_WRITE;
            break;
        case 'a':
            type = WPT_ACCESS;
            break;
        default:
            LOG_ERROR("invalid watchpoint mode ('%c')", CMD_ARGV[2][0]);
            return ERROR_COMMAND_SYNTAX_ERROR;
        }
        /* fall through */
    case 2:
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], length);
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);
        break;

    default:
        return ERROR_COMMAND_SYNTAX_ERROR;
    }

    int retval = watchpoint_add(target, addr, length, type,
            data_value, data_mask);
    if (ERROR_OK != retval)
        LOG_ERROR("Failure setting watchpoints");

    return retval;
}

COMMAND_HANDLER(handle_rwp_command)
{
    if (CMD_ARGC != 1)
        return ERROR_COMMAND_SYNTAX_ERROR;

    uint32_t addr;
    COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], addr);

    struct target *target = get_current_target(CMD_CTX);
    watchpoint_remove(target, addr);

    return ERROR_OK;
}

COMMAND_HANDLER(handle_virt2phys_command)
{
    if (CMD_ARGC != 1)
        return ERROR_COMMAND_SYNTAX_ERROR;

    target_addr_t va;
    COMMAND_PARSE_ADDRESS(CMD_ARGV[0], va);
    target_addr_t pa;

    struct target *target = get_current_target(CMD_CTX);
    int retval = target->type->virt2phys(target, va, &pa);
    if (retval == ERROR_OK)
        command_print(CMD, "Physical address " TARGET_ADDR_FMT "", pa);

    return retval;
}

static void writeData(FILE *f, const void *data, size_t len)
{
    size_t written = fwrite(data, 1, len, f);
    if (written != len)
        LOG_ERROR("failed to write %zu bytes: %s", len, strerror(errno));
}

static void writeLong(FILE *f, int l, struct target *target)
{
    uint8_t val[4];

    target_buffer_set_u32(target, val, l);
    writeData(f, val, 4);
}

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 write_gmon(uint32_t *samples, uint32_t sampleNum, const char *filename, bool with_range,
            uint32_t start_address, uint32_t end_address, struct target *target, uint32_t duration_ms)
{
    uint32_t i;
    FILE *f = fopen(filename, "w");
    if (f == NULL)
        return;
    writeString(f, "gmon");
    writeLong(f, 0x00000001, target); /* Version */
    writeLong(f, 0, target); /* padding */
    writeLong(f, 0, target); /* padding */
    writeLong(f, 0, target); /* padding */

    uint8_t zero = 0;  /* GMON_TAG_TIME_HIST */
    writeData(f, &zero, 1);

    /* figure out bucket size */
    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) * numBuckets);
    for (i = 0; i < sampleNum; i++) {
        uint32_t address = samples[i];

        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, target);          /* low_pc */
    writeLong(f, max, target);          /* high_pc */
    writeLong(f, numBuckets, target);   /* # of buckets */
    float sample_rate = sampleNum / (duration_ms / 1000.0);
    writeLong(f, sample_rate, target);
    writeString(f, "seconds");
    for (i = 0; i < (15-strlen("seconds")); i++)
        writeData(f, &zero, 1);
    writeString(f, "s");

    /*append binary memory gmon.out profile_hist_data (profile_hist_data + profile_hist_hdr.hist_size) */

    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;
        }
        free(buckets);
        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 */
COMMAND_HANDLER(handle_profile_command)
{
    struct target *target = get_current_target(CMD_CTX);

    if ((CMD_ARGC != 2) && (CMD_ARGC != 4))
        return ERROR_COMMAND_SYNTAX_ERROR;

    const uint32_t MAX_PROFILE_SAMPLE_NUM = 10000;
    uint32_t offset;
    uint32_t num_of_samples;
    int retval = ERROR_OK;
    bool halted_before_profiling = target->state == TARGET_HALTED;

    COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], offset);

    uint32_t *samples = malloc(sizeof(uint32_t) * MAX_PROFILE_SAMPLE_NUM);
    if (samples == NULL) {
        LOG_ERROR("No memory to store samples.");
        return ERROR_FAIL;
    }

    uint64_t timestart_ms = timeval_ms();
    retval = target_profiling(target, samples, MAX_PROFILE_SAMPLE_NUM,
                &num_of_samples, offset);
    if (retval != ERROR_OK) {
        free(samples);
        return retval;
    }
    uint32_t duration_ms = timeval_ms() - timestart_ms;

    assert(num_of_samples <= MAX_PROFILE_SAMPLE_NUM);

    retval = target_poll(target);
    if (retval != ERROR_OK) {
        free(samples);
        return retval;
    }

    if (target->state == TARGET_RUNNING && halted_before_profiling) {
        /* The target was halted before we started and is running now. Halt it,
         * for consistency. */
        retval = target_halt(target);
        if (retval != ERROR_OK) {
            free(samples);
            return retval;
        }
    } else if (target->state == TARGET_HALTED && !halted_before_profiling) {
        /* The target was running before we started and is halted now. Resume
         * it, for consistency. */
        retval = target_resume(target, 1, 0, 0, 0);
        if (retval != ERROR_OK) {
            free(samples);
            return retval;
        }
    }

    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, target, duration_ms);
    command_print(CMD, "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)
{
    char *namebuf;
    Jim_Obj *nameObjPtr, *valObjPtr;
    int result;

    namebuf = alloc_printf("%s(%d)", varname, idx);
    if (!namebuf)
        return JIM_ERR;

    nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
    valObjPtr = Jim_NewIntObj(interp, val);
    if (!nameObjPtr || !valObjPtr) {
        free(namebuf);
        return JIM_ERR;
    }

    Jim_IncrRefCount(nameObjPtr);
    Jim_IncrRefCount(valObjPtr);
    result = Jim_SetVariable(interp, nameObjPtr, valObjPtr);
    Jim_DecrRefCount(interp, nameObjPtr);
    Jim_DecrRefCount(interp, valObjPtr);
    free(namebuf);
    /* printf("%s(%d) <= 0%08x\n", varname, idx, val); */
    return result;
}

static int jim_mem2array(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
    struct command_context *context;
    struct target *target;

    context = current_command_context(interp);
    assert(context != NULL);

    target = get_current_target(context);
    if (target == NULL) {
        LOG_ERROR("mem2array: no current target");
        return JIM_ERR;
    }

    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)
{
    long l;
    uint32_t width;
    int len;
    uint32_t addr;
    uint32_t count;
    uint32_t v;
    const char *varname;
    const char *phys;
    bool is_phys;
    int  n, e, retval;
    uint32_t i;

    /* argv[1] = name of array to receive the data
     * argv[2] = desired width
     * argv[3] = memory address
     * argv[4] = count of times to read
     */

    if (argc < 4 || argc > 5) {
        Jim_WrongNumArgs(interp, 0, argv, "varname width addr nelems [phys]");
        return JIM_ERR;
    }
    varname = Jim_GetString(argv[0], &len);
    /* given "foo" get space for worse case "foo(%d)" .. add 20 */

    e = Jim_GetLong(interp, argv[1], &l);
    width = l;
    if (e != JIM_OK)
        return e;

    e = Jim_GetLong(interp, argv[2], &l);
    addr = l;
    if (e != JIM_OK)
        return e;
    e = Jim_GetLong(interp, argv[3], &l);
    len = l;
    if (e != JIM_OK)
        return e;
    is_phys = false;
    if (argc > 4) {
        phys = Jim_GetString(argv[4], &n);
        if (!strncmp(phys, "phys", n))
            is_phys = true;
        else
            return JIM_ERR;
    }
    switch (width) {
        case 8:
            width = 1;
            break;
        case 16:
            width = 2;
            break;
        case 32:
            width = 4;
            break;
        default:
            Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
            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), "mem2array: zero width read?", NULL);
        return JIM_ERR;
    }
    if ((addr + (len * width)) < addr) {
        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
        Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: 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), "mem2array: absurd > 64K item request", NULL);
        return JIM_ERR;
    }

    if ((width == 1) ||
        ((width == 2) && ((addr & 1) == 0)) ||
        ((width == 4) && ((addr & 3) == 0))) {
        /* all is well */
    } else {
        char buf[100];
        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
        sprintf(buf, "mem2array address: 0x%08" PRIx32 " is not aligned for %" PRIu32 " byte reads",
                addr,
                width);
        Jim_AppendStrings(interp, Jim_GetResult(interp), buf, NULL);
        return JIM_ERR;
    }

    /* Transfer loop */

    /* 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 > (buffersize / width))
            count = (buffersize / width);

        if (is_phys)
            retval = target_read_phys_memory(target, addr, width, count, buffer);
        else
            retval = target_read_memory(target, addr, width, count, buffer);
        if (retval != ERROR_OK) {
            /* BOO !*/
            LOG_ERROR("mem2array: Read @ 0x%08" PRIx32 ", w=%" PRIu32 ", cnt=%" PRIu32 ", failed",
                      addr,
                      width,
                      count);
            Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
            Jim_AppendStrings(interp, Jim_GetResult(interp), "mem2array: cannot read memory", NULL);
            e = JIM_ERR;
            break;
        } else {
            v = 0; /* shut up gcc */
            for (i = 0; i < count ; i++, n++) {
                switch (width) {
                    case 4:
                        v = target_buffer_get_u32(target, &buffer[i*width]);
                        break;
                    case 2:
                        v = target_buffer_get_u16(target, &buffer[i*width]);
                        break;
                    case 1:
                        v = buffer[i] & 0x0ff;
                        break;
                }
                new_int_array_element(interp, varname, n, v);
            }
            len -= count;
            addr += count * width;
        }
    }

    free(buffer);

    Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));

    return e;
}

static int get_int_array_element(Jim_Interp *interp, const char *varname, int idx, uint32_t *val)
{
    char *namebuf;
    Jim_Obj *nameObjPtr, *valObjPtr;
    int result;
    long l;

    namebuf = alloc_printf("%s(%d)", varname, idx);
    if (!namebuf)
        return JIM_ERR;

    nameObjPtr = Jim_NewStringObj(interp, namebuf, -1);
    if (!nameObjPtr) {
        free(namebuf);
        return JIM_ERR;
    }

    Jim_IncrRefCount(nameObjPtr);
    valObjPtr = Jim_GetVariable(interp, nameObjPtr, JIM_ERRMSG);
    Jim_DecrRefCount(interp, nameObjPtr);
    free(namebuf);
    if (valObjPtr == NULL)
        return JIM_ERR;

    result = Jim_GetLong(interp, valObjPtr, &l);
    /* printf("%s(%d) => 0%08x\n", varname, idx, val); */
    *val = l;
    return result;
}

static int jim_array2mem(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
{
    struct command_context *context;
    struct target *target;

    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);
}

static int target_array2mem(Jim_Interp *interp, struct target *target,
        int argc, Jim_Obj *const *argv)
{
    long l;
    uint32_t width;
    int len;
    uint32_t addr;
    uint32_t count;
    uint32_t v;
    const char *varname;
    const char *phys;
    bool is_phys;
    int  n, e, retval;
    uint32_t i;

    /* argv[1] = name of array to get the data
     * argv[2] = desired width
     * argv[3] = memory address
     * argv[4] = count to write
     */
    if (argc < 4 || argc > 5) {
        Jim_WrongNumArgs(interp, 0, argv, "varname width addr nelems [phys]");
        return JIM_ERR;
    }
    varname = Jim_GetString(argv[0], &len);
    /* given "foo" get space for worse case "foo(%d)" .. add 20 */

    e = Jim_GetLong(interp, argv[1], &l);
    width = l;
    if (e != JIM_OK)
        return e;

    e = Jim_GetLong(interp, argv[2], &l);
    addr = l;
    if (e != JIM_OK)
        return e;
    e = Jim_GetLong(interp, argv[3], &l);
    len = l;
    if (e != JIM_OK)
        return e;
    is_phys = false;
    if (argc > 4) {
        phys = Jim_GetString(argv[4], &n);
        if (!strncmp(phys, "phys", n))
            is_phys = true;
        else
            return JIM_ERR;
    }
    switch (width) {
        case 8:
            width = 1;
            break;
        case 16:
            width = 2;
            break;
        case 32:
            width = 4;
            break;
        default:
            Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
            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);
        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);
        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);
        return JIM_ERR;
    }

    if ((width == 1) ||
        ((width == 2) && ((addr & 1) == 0)) ||
        ((width == 4) && ((addr & 3) == 0))) {
        /* all is well */
    } else {
        char buf[100];
        Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
        sprintf(buf, "array2mem address: 0x%08" PRIx32 " is not aligned for %" PRIu32 " byte reads",
                addr,
                width);
        Jim_AppendStrings(interp, Jim_GetResult(interp), buf, NULL);
        return JIM_ERR;
    }

    /* Transfer loop */

    /* index counter */
    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 > (buffersize / width))
            count = (buffersize / width);

        v = 0; /* shut up gcc */
        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);
                break;
            case 2:
                target_buffer_set_u16(target, &buffer[i * width], v);
                break;
            case 1:
                buffer[i] = v & 0x0ff;
                break;
            }
        }
        len -= count;

        if (is_phys)
            retval = target_write_phys_memory(target, addr, width, count, buffer);
        else
            retval = target_write_memory(target, addr, width, count, buffer);
        if (retval != ERROR_OK) {
            /* BOO !*/
            LOG_ERROR("array2mem: Write @ 0x%08" PRIx32 ", w=%" PRIu32 ", cnt=%" PRIu32 ", failed",
                      addr,
                      width,
                      count);
            Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));
            Jim_AppendStrings(interp, Jim_GetResult(interp), "array2mem: cannot read memory", NULL);
            e = JIM_ERR;
            break;
        }
        addr += count * width;
    }

    free(buffer);

    Jim_SetResult(interp, Jim_NewEmptyStringObj(interp));

    return e;
}

/* FIX? should we propagate errors here rather than printing them
 * and continuing?
 */
void target_handle_event(struct target *target, enum target_event e)
{
    struct target_event_action *teap;
    int retval;

    for (teap = target->event_action; teap != NULL; teap = teap->next) {
        if (teap->event == e) {
            LOG_DEBUG("target(%d): %s (%s) event: %d (%s) action: %s",
                       target->target_number,
                       target_name(target),
                       target_type_name(target),
                       e,
                       Jim_Nvp_value2name_simple(nvp_target_event, e)->name,
                       Jim_GetString(teap->body, NULL));

            /* Override current target by the target an event
             * is issued from (lot of scripts need it).
             * Return back to previous override as soon
             * as the handler processing is done */
            struct command_context *cmd_ctx = current_command_context(teap->interp);
            struct target *saved_target_override = cmd_ctx->current_target_override;
            cmd_ctx->current_target_override = target;

            retval = Jim_EvalObj(teap->interp, teap->body);

            cmd_ctx->current_target_override = saved_target_override;

            if (retval == ERROR_COMMAND_CLOSE_CONNECTION)
                return;

            if (retval == JIM_RETURN)
                retval = teap->interp->returnCode;

            if (retval != JIM_OK) {
                Jim_MakeErrorMessage(teap->interp);
                LOG_USER("Error executing event %s on target %s:\n%s",
                          Jim_Nvp_value2name_simple(nvp_target_event, e)->name,
                          target_name(target),
                          Jim_GetString(Jim_GetResult(teap->interp), NULL));
                /* clean both error code and stacktrace before return */
                Jim_Eval(teap->interp, "error \"\" \"\"");
            }
        }
    }
}

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,
    TCFG_WORK_AREA_VIRT,
    TCFG_WORK_AREA_PHYS,
    TCFG_WORK_AREA_SIZE,
    TCFG_WORK_AREA_BACKUP,
    TCFG_ENDIAN,
    TCFG_COREID,
    TCFG_CHAIN_POSITION,
    TCFG_DBGBASE,
    TCFG_RTOS,
    TCFG_DEFER_EXAMINE,
    TCFG_GDB_PORT,
    TCFG_GDB_MAX_CONNECTIONS,
};

static Jim_Nvp nvp_config_opts[] = {
    { .name = "-type",             .value = TCFG_TYPE },
    { .name = "-event",            .value = TCFG_EVENT },
    { .name = "-work-area-virt",   .value = TCFG_WORK_AREA_VIRT },
    { .name = "-work-area-phys",   .value = TCFG_WORK_AREA_PHYS },
    { .name = "-work-area-size",   .value = TCFG_WORK_AREA_SIZE },
    { .name = "-work-area-backup", .value = TCFG_WORK_AREA_BACKUP },
    { .name = "-endian",           .value = TCFG_ENDIAN },
    { .name = "-coreid",           .value = TCFG_COREID },
    { .name = "-chain-position",   .value = TCFG_CHAIN_POSITION },
    { .name = "-dbgbase",          .value = TCFG_DBGBASE },
    { .name = "-rtos",             .value = TCFG_RTOS },
    { .name = "-defer-examine",    .value = TCFG_DEFER_EXAMINE },
    { .name = "-gdb-port",         .value = TCFG_GDB_PORT },
    { .name = "-gdb-max-connections",   .value = TCFG_GDB_MAX_CONNECTIONS },
    { .name = NULL, .value = -1 }
};

static int target_configure(Jim_GetOptInfo *goi, struct target *target)
{
    Jim_Nvp *n;
    Jim_Obj *o;
    jim_wide w;
    int e;

    /* parse config or cget options ... */
    while (goi->argc > 0) {
        Jim_SetEmptyResult(goi->interp);
        /* Jim_GetOpt_Debug(goi); */

        if (target->type->target_jim_configure) {
            /* target defines a configure function */
            /* target gets first dibs on parameters */
            e = (*(target->type->target_jim_configure))(target, goi);
            if (e == JIM_OK) {
                /* more? */
                continue;
            }
            if (e == JIM_ERR) {
                /* An error */
                return e;
            }
            /* otherwise we 'continue' below */
        }
        e = Jim_GetOpt_Nvp(goi, nvp_config_opts, &n);
        if (e != JIM_OK) {
            Jim_GetOpt_NvpUnknown(goi, nvp_config_opts, 0);
            return e;
        }
        switch (n->value) {
        case TCFG_TYPE:
            /* not settable */
            if (goi->isconfigure) {
                Jim_SetResultFormatted(goi->interp,
                        "not settable: %s", n->name);
                return JIM_ERR;
            } else {
no_params:
                if (goi->argc != 0) {
                    Jim_WrongNumArgs(goi->interp,
                            goi->argc, goi->argv,
                            "NO PARAMS");
                    return JIM_ERR;
                }
            }
            Jim_SetResultString(goi->interp,
                    target_type_name(target), -1);
            /* loop for more */
            break;
        case TCFG_EVENT:
            if (goi->argc == 0) {
                Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event ?event-name? ...");
                return JIM_ERR;
            }

            e = Jim_GetOpt_Nvp(goi, nvp_target_event, &n);
            if (e != JIM_OK) {
                Jim_GetOpt_NvpUnknown(goi, nvp_target_event, 1);
                return e;
            }

            if (goi->isconfigure) {
                if (goi->argc != 1) {
                    Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event ?event-name? ?EVENT-BODY?");
                    return JIM_ERR;
                }
            } else {
                if (goi->argc != 0) {
                    Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "-event ?event-name?");
                    return JIM_ERR;
                }
            }

            {
                struct target_event_action *teap;

                teap = target->event_action;
                /* replace existing? */
                while (teap) {
                    if (teap->event == (enum target_event)n->value)
                        break;
                    teap = teap->next;
                }

                if (goi->isconfigure) {
                    bool replace = true;
                    if (teap == NULL) {
                        /* create new */
                        teap = calloc(1, sizeof(*teap));
                        replace = false;
                    }
                    teap->event = n->value;
                    teap->interp = goi->interp;
                    Jim_GetOpt_Obj(goi, &o);
                    if (teap->body)
                        Jim_DecrRefCount(teap->interp, teap->body);
                    teap->body  = Jim_DuplicateObj(goi->interp, o);
                    /*
                     * FIXME:
                     *     Tcl/TK - "tk events" have a nice feature.
                     *     See the "BIND" command.
                     *    We should support that here.
                     *     You can specify %X and %Y in the event code.
                     *     The idea is: %T - target name.
                     *     The idea is: %N - target number
                     *     The idea is: %E - event name.
                     */
                    Jim_IncrRefCount(teap->body);

                    if (!replace) {
                        /* add to head of event list */
                        teap->next = target->event_action;
                        target->event_action = teap;
                    }
                    Jim_SetEmptyResult(goi->interp);
                } else {
                    /* get */
                    if (teap == NULL)
                        Jim_SetEmptyResult(goi->interp);
                    else
                        Jim_SetResult(goi->interp, Jim_DuplicateObj(goi->interp, teap->body));
                }
            }
            /* loop for more */
            break;

        case TCFG_WORK_AREA_VIRT:
            if (goi->isconfigure) {
                target_free_all_working_areas(target);
                e = Jim_GetOpt_Wide(goi, &w);
                if (e != JIM_OK)
                    return e;
                target->working_area_virt = w;
                target->working_area_virt_spec = true;
            } else {
                if (goi->argc != 0)
                    goto no_params;
            }
            Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->working_area_virt));
            /* loop for more */
            break;

        case TCFG_WORK_AREA_PHYS:
            if (goi->isconfigure) {
                target_free_all_working_areas(target);
                e = Jim_GetOpt_Wide(goi, &w);
                if (e != JIM_OK)
                    return e;
                target->working_area_phys = w;
                target->working_area_phys_spec = true;
            } else {
                if (goi->argc != 0)
                    goto no_params;
            }
            Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->working_area_phys));
            /* loop for more */
            break;

        case TCFG_WORK_AREA_SIZE:
            if (goi->isconfigure) {
                target_free_all_working_areas(target);
                e = Jim_GetOpt_Wide(goi, &w);
                if (e != JIM_OK)
                    return e;
                target->working_area_size = w;
            } else {
                if (goi->argc != 0)
                    goto no_params;
            }
            Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->working_area_size));
            /* loop for more */
            break;

        case TCFG_WORK_AREA_BACKUP:
            if (goi->isconfigure) {
                target_free_all_working_areas(target);
                e = Jim_GetOpt_Wide(goi, &w);
                if (e != JIM_OK)
                    return e;
                /* make this exactly 1 or 0 */
                target->backup_working_area = (!!w);
            } else {
                if (goi->argc != 0)
                    goto no_params;
            }
            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);
                if (e != JIM_OK) {
                    Jim_GetOpt_NvpUnknown(goi, nvp_target_endian, 1);
                    return e;
                }
                target->endianness = n->value;
            } else {
                if (goi->argc != 0)
                    goto no_params;
            }
            n = Jim_Nvp_value2name_simple(nvp_target_endian, target->endianness);
            if (n->name == NULL) {
                target->endianness = TARGET_LITTLE_ENDIAN;
                n = Jim_Nvp_value2name_simple(nvp_target_endian, target->endianness);
            }
            Jim_SetResultString(goi->interp, n->name, -1);
            /* loop for more */
            break;

        case TCFG_COREID:
            if (goi->isconfigure) {
                e = Jim_GetOpt_Wide(goi, &w);
                if (e != JIM_OK)
                    return e;
                target->coreid = (int32_t)w;
            } else {
                if (goi->argc != 0)
                    goto no_params;
            }
            Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->coreid));
            /* loop for more */
            break;

        case TCFG_CHAIN_POSITION:
            if (goi->isconfigure) {
                Jim_Obj *o_t;
                struct jtag_tap *tap;

                if (target->has_dap) {
                    Jim_SetResultString(goi->interp,
                        "target requires -dap parameter instead of -chain-position!", -1);
                    return JIM_ERR;
                }

                target_free_all_working_areas(target);
                e = Jim_GetOpt_Obj(goi, &o_t);
                if (e != JIM_OK)
                    return e;
                tap = jtag_tap_by_jim_obj(goi->interp, o_t);
                if (tap == NULL)
                    return JIM_ERR;
                target->tap = tap;
                target->tap_configured = true;
            } else {
                if (goi->argc != 0)
                    goto no_params;
            }
            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;

        case TCFG_DEFER_EXAMINE:
            /* DEFER_EXAMINE */
            target->defer_examine = true;
            /* loop for more */
            break;

        case TCFG_GDB_PORT:
            if (goi->isconfigure) {
                struct command_context *cmd_ctx = current_command_context(goi->interp);
                if (cmd_ctx->mode != COMMAND_CONFIG) {
                    Jim_SetResultString(goi->interp, "-gdb-port must be configured before 'init'", -1);
                    return JIM_ERR;
                }

                const char *s;
                e = Jim_GetOpt_String(goi, &s, NULL);
                if (e != JIM_OK)
                    return e;
                target->gdb_port_override = strdup(s);
            } else {
                if (goi->argc != 0)
                    goto no_params;
            }
            Jim_SetResultString(goi->interp, target->gdb_port_override ? : "undefined", -1);
            /* loop for more */
            break;

        case TCFG_GDB_MAX_CONNECTIONS:
            if (goi->isconfigure) {
                struct command_context *cmd_ctx = current_command_context(goi->interp);
                if (cmd_ctx->mode != COMMAND_CONFIG) {
                    Jim_SetResultString(goi->interp, "-gdb-max-conenctions must be configured before 'init'", -1);
                    return JIM_ERR;
                }

                e = Jim_GetOpt_Wide(goi, &w);
                if (e != JIM_OK)
                    return e;
                target->gdb_max_connections = (w < 0) ? CONNECTION_LIMIT_UNLIMITED : (int)w;
            } else {
                if (goi->argc != 0)
                    goto no_params;
            }
            Jim_SetResult(goi->interp, Jim_NewIntObj(goi->interp, target->gdb_max_connections));
            break;
        }
    } /* while (goi->argc) */


        /* done - we return */
    return JIM_OK;
}

static int jim_target_configure(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
{
    Jim_GetOptInfo goi;

    Jim_GetOpt_Setup(&goi, interp, argc - 1, argv + 1);
    goi.isconfigure = !strcmp(Jim_GetString(argv[0], NULL), "configure");
    if (goi.argc < 1) {
        Jim_WrongNumArgs(goi.interp, goi.argc, goi.argv,
                 "missing: -option ...");
        return JIM_ERR;
    }
    struct target *target = Jim_CmdPrivData(goi.interp);
    return target_configure(&goi, target);
}

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);
}

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)
{
    bool allow_defer = false;

    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,
                "usage: %s ['allow-defer']", cmd_name);
        return JIM_ERR;
    }
    if (goi.argc > 0 &&
        strcmp(Jim_GetString(argv[1], NULL), "allow-defer") == 0) {
        /* consume it */
        Jim_Obj *obj;
        int e = Jim_GetOpt_Obj(&goi, &obj);
        if (e != JIM_OK)
            return e;
        allow_defer = true;
    }

    struct target *target = Jim_CmdPrivData(interp);
    if (!target->tap->enabled)
        return jim_target_tap_disabled(interp);

    if (allow_defer && target->defer_examine) {
        LOG_INFO("Deferring arp_examine of %s", target_name(target));
        LOG_INFO("Use arp_examine command to examine it manually!");
        return JIM_OK;
    }

    int e = target->type->examine(target);
    if (e != ERROR_OK)
        return JIM_ERR;
    return JIM_OK;
}

static int jim_target_was_examined(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
{
    struct target *target = Jim_CmdPrivData(interp);

    Jim_SetResultBool(interp, target_was_examined(target));
    return JIM_OK;
}

static int jim_target_examine_deferred(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
{
    struct target *target = Jim_CmdPrivData(interp);

    Jim_SetResultBool(interp, target->defer_examine);
    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->type->assert_reset || !target->type->deassert_reset) {
        Jim_SetResultFormatted(interp,
                "No target-specific reset for %s",
                target_name(target));
        return JIM_ERR;
    }

    if (target->defer_examine)
        target_reset_examined(target);

    /* 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));
        return JIM_ERR;
    }
    return JIM_OK;
}
/* List for human, Events defined for this target.
 * scripts/programs should use 'name cget -event NAME'
 */
COMMAND_HANDLER(handle_target_event_list)
{
    struct target *target = get_current_target(CMD_CTX);
    struct target_event_action *teap = target->event_action;

    command_print(CMD, "Event actions for target (%d) %s\n",
                   target->target_number,
                   target_name(target));
    command_print(CMD, "%-25s | Body", "Event");
    command_print(CMD, "------------------------- | "
            "----------------------------------------");
    while (teap) {
        Jim_Nvp *opt = Jim_Nvp_value2name_simple(nvp_target_event, teap->event);
        command_print(CMD, "%-25s | %s",
                opt->name, Jim_GetString(teap->body, NULL));
        teap = teap->next;
    }
    command_print(CMD, "***END***");
    return ERROR_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_ANY,
        .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 = "mwd",
        .handler = handle_mw_command,
        .mode = COMMAND_EXEC,
        .help = "Write 64-bit word(s) to target memory",
        .usage = "address data [count]",
    },
    {
        .name = "mww",
        .handler = handle_mw_command,
        .mode = COMMAND_EXEC,
        .help = "Write 32-bit word(s) to target memory",
        .usage = "address data [count]",
    },
    {
        .name = "mwh",
        .handler = handle_mw_command,
        .mode = COMMAND_EXEC,
        .help = "Write 16-bit half-word(s) to target memory",
        .usage = "address data [count]",
    },
    {
        .name = "mwb",
        .handler = handle_mw_command,
        .mode = COMMAND_EXEC,
        .help = "Write byte(s) to target memory",
        .usage = "address data [count]",
    },
    {
        .name = "mdd",
        .handler = handle_md_command,
        .mode = COMMAND_EXEC,
        .help = "Display target memory as 64-bit words",
        .usage = "address [count]",
    },
    {
        .name = "mdw",
        .handler = handle_md_command,
        .mode = COMMAND_EXEC,
        .help = "Display target memory as 32-bit words",
        .usage = "address [count]",
    },
    {
        .name = "mdh",
        .handler = handle_md_command,
        .mode = COMMAND_EXEC,
        .help = "Display target memory as 16-bit half-words",
        .usage = "address [count]",
    },
    {
        .name = "mdb",
        .handler = handle_md_command,
        .mode = COMMAND_EXEC,
        .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",
        .handler = handle_target_event_list,
        .mode = COMMAND_EXEC,
        .help = "displays a table of events defined for this target",
        .usage = "",
    },
    {
        .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",
        .usage = "['allow-defer']",
    },
    {
        .name = "was_examined",
        .mode = COMMAND_EXEC,
        .jim_handler = jim_target_was_examined,
        .help = "used internally for reset processing",
    },
    {
        .name = "examine_deferred",
        .mode = COMMAND_EXEC,
        .jim_handler = jim_target_examine_deferred,
        .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;
    Jim_Cmd *cmd;
    const char *cp;
    int e;
    int x;
    struct target *target;
    struct command_context *cmd_ctx;

    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;
    }

    /* COMMAND */
    Jim_GetOpt_Obj(goi, &new_cmd);
    /* does this command exist? */
    cmd = Jim_GetCommand(goi->interp, new_cmd, JIM_ERRMSG);
    if (cmd) {
        cp = Jim_GetString(new_cmd, NULL);
        Jim_SetResultFormatted(goi->interp, "Command/target: %s Exists", cp);
        return JIM_ERR;
    }

    /* TYPE */
    e = Jim_GetOpt_String(goi, &cp, NULL);
    if (e != JIM_OK)
        return e;
    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_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,
                                   Jim_GetResult(goi->interp),
                                   target_types[x]->name,
                                   ", ", NULL);
            } else {
                Jim_AppendStrings(goi->interp,
                                   Jim_GetResult(goi->interp),
                                   " or ",
                                   target_types[x]->name, NULL);
            }
        }
        return JIM_ERR;
    }

    /* Create it */
    target = calloc(1, sizeof(struct target));
    if (!target) {
        LOG_ERROR("Out of memory");
        return JIM_ERR;
    }

    /* set target number */
    target->target_number = new_target_number();

    /* allocate memory for each unique target type */
    target->type = malloc(sizeof(struct target_type));
    if (!target->type) {
        LOG_ERROR("Out of memory");
        free(target);
        return JIM_ERR;
    }

    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;
    target->backup_working_area = 0;

    target->state               = TARGET_UNKNOWN;
    target->debug_reason        = DBG_REASON_UNDEFINED;
    target->reg_cache           = NULL;
    target->breakpoints         = NULL;
    target->watchpoints         = NULL;
    target->next                = NULL;
    target->arch_info           = NULL;

    target->verbose_halt_msg    = true;

    target->halt_issued         = false;

    /* initialize trace information */
    target->trace_info = calloc(1, sizeof(struct trace));
    if (!target->trace_info) {
        LOG_ERROR("Out of memory");
        free(target->type);
        free(target);
        return JIM_ERR;
    }

    target->dbgmsg          = NULL;
    target->dbg_msg_enabled = 0;

    target->endianness = TARGET_ENDIAN_UNKNOWN;

    target->rtos = NULL;
    target->rtos_auto_detect = false;

    target->gdb_port_override = NULL;
    target->gdb_max_connections = 1;

    /* Do the rest as "configure" options */
    goi->isconfigure = 1;
    e = target_configure(goi, target);

    if (e == JIM_OK) {
        if (target->has_dap) {
            if (!target->dap_configured) {
                Jim_SetResultString(goi->interp, "-dap ?name? required when creating target", -1);
                e = JIM_ERR;
            }
        } else {
            if (!target->tap_configured) {
                Jim_SetResultString(goi->interp, "-chain-position ?name? required when creating target", -1);
                e = JIM_ERR;
            }
        }
        /* tap must be set after target was configured */
        if (target->tap == NULL)
            e = JIM_ERR;
    }

    if (e != JIM_OK) {
        rtos_destroy(target);
        free(target->gdb_port_override);
        free(target->trace_info);
        free(target->type);
        free(target);
        return e;
    }

    if (target->endianness == TARGET_ENDIAN_UNKNOWN) {
        /* default endian to little if not specified */
        target->endianness = TARGET_LITTLE_ENDIAN;
    }

    cp = Jim_GetString(new_cmd, NULL);
    target->cmd_name = strdup(cp);
    if (!target->cmd_name) {
        LOG_ERROR("Out of memory");
        rtos_destroy(target);
        free(target->gdb_port_override);
        free(target->trace_info);
        free(target->type);
        free(target);
        return JIM_ERR;
    }

    if (target->type->target_create) {
        e = (*(target->type->target_create))(target, goi->interp);
        if (e != ERROR_OK) {
            LOG_DEBUG("target_create failed");
            free(target->cmd_name);
            rtos_destroy(target);
            free(target->gdb_port_override);
            free(target->trace_info);
            free(target->type);
            free(target);
            return JIM_ERR;
        }
    }

    /* create the target specific commands */
    if (target->type->commands) {
        e = register_commands(cmd_ctx, NULL, target->type->commands);
        if (ERROR_OK != e)
            LOG_ERROR("unable to register '%s' commands", cp);
    }

    /* now - create the new target name command */
    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 (e != ERROR_OK) {
        if (target->type->deinit_target)
            target->type->deinit_target(target);
        free(target->cmd_name);
        rtos_destroy(target);
        free(target->gdb_port_override);
        free(target->trace_info);
        free(target->type);
        free(target);
        return JIM_ERR;
    }

    struct command *c = command_find_in_context(cmd_ctx, cp);
    assert(c);
    command_set_handler_data(c, target);

    /* append to end of list */
    append_to_list_all_targets(target);

    cmd_ctx->current_target = target;
    return JIM_OK;
}

static int jim_target_current(Jim_Interp *interp, int argc, Jim_Obj *const *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);

    struct target *target = get_current_target_or_null(cmd_ctx);
    if (target)
        Jim_SetResultString(interp, target_name(target), -1);
    return JIM_OK;
}

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;
}

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;
}

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 associate 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;

    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;
    }
    return target_create(&goi);
}

static const struct command_registration target_subcommand_handlers[] = {
    {
        .name = "init",
        .mode = COMMAND_CONFIG,
        .handler = handle_target_init_command,
        .help = "initialize targets",
        .usage = "",
    },
    {
        .name = "create",
        .mode = COMMAND_CONFIG,
        .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 = "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 {
    target_addr_t address;
    uint8_t *data;
    int length;

};

static int fastload_num;
static struct FastLoad *fastload;

static void free_fastload(void)
{
    if (fastload != NULL) {
        for (int i = 0; i < fastload_num; i++)
            free(fastload[i].data);
        free(fastload);
        fastload = NULL;
    }
}

COMMAND_HANDLER(handle_fast_load_image_command)
{
    uint8_t *buffer;
    size_t buf_cnt;
    uint32_t image_size;
    target_addr_t min_address = 0;
    target_addr_t max_address = -1;

    struct image image;

    int retval = CALL_COMMAND_HANDLER(parse_load_image_command_CMD_ARGV,
            &image, &min_address, &max_address);
    if (ERROR_OK != retval)
        return retval;

    struct duration bench;
    duration_start(&bench);

    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 = malloc(sizeof(struct FastLoad)*image.num_sections);
    if (fastload == NULL) {
        command_print(CMD, "out of memory");
        image_close(&image);
        return ERROR_FAIL;
    }
    memset(fastload, 0, sizeof(struct FastLoad)*image.num_sections);
    for (unsigned int i = 0; i < image.num_sections; i++) {
        buffer = malloc(image.sections[i].size);
        if (buffer == NULL) {
            command_print(CMD, "error allocating buffer for section (%d bytes)",
                          (int)(image.sections[i].size));
            retval = ERROR_FAIL;
            break;
        }

        retval = image_read_section(&image, i, 0x0, image.sections[i].size, buffer, &buf_cnt);
        if (retval != ERROR_OK) {
            free(buffer);
            break;
        }

        uint32_t offset = 0;
        uint32_t length = buf_cnt;

        /* DANGER!!! beware of unsigned comparison 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) {
                /* 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) {
                free(buffer);
                command_print(CMD, "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, "%u bytes written at address 0x%8.8x",
                          (unsigned int)length,
                          ((unsigned int)(image.sections[i].base_address + offset)));
        }

        free(buffer);
    }

    if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
        command_print(CMD, "Loaded %" PRIu32 " bytes "
                "in %fs (%0.3f KiB/s)", image_size,
                duration_elapsed(&bench), duration_kbps(&bench, image_size));

        command_print(CMD,
                "WARNING: image has not been loaded to target!"
                "You can issue a 'fast_load' to finish loading.");
    }

    image_close(&image);

    if (retval != ERROR_OK)
        free_fastload();

    return retval;
}

COMMAND_HANDLER(handle_fast_load_command)
{
    if (CMD_ARGC > 0)
        return ERROR_COMMAND_SYNTAX_ERROR;
    if (fastload == NULL) {
        LOG_ERROR("No image in memory");
        return ERROR_FAIL;
    }
    int i;
    int64_t 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, "Write to 0x%08x, length 0x%08x",
                      (unsigned int)(fastload[i].address),
                      (unsigned int)(fastload[i].length));
        retval = target_write_buffer(target, fastload[i].address, fastload[i].length, fastload[i].data);
        if (retval != ERROR_OK)
            break;
        size += fastload[i].length;
    }
    if (retval == ERROR_OK) {
        int64_t after = timeval_ms();
        command_print(CMD, "Loaded image %f kBytes/s", (float)(size/1024.0)/((float)(after-ms)/1000.0));
    }
    return retval;
}

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,
        .usage = "",
    },
    COMMAND_REGISTRATION_DONE
};

int target_register_commands(struct command_context *cmd_ctx)
{
    return register_commands(cmd_ctx, NULL, target_command_handlers);
}

static bool target_reset_nag = true;

bool get_target_reset_nag(void)
{
    return target_reset_nag;
}

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");
}

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;
    }

    if ((target->rtos) && (target->rtos->type)
            && (target->rtos->type->ps_command)) {
        display = target->rtos->type->ps_command(target);
        command_print(CMD, "%s", display);
        free(display);
        return ERROR_OK;
    } else {
        LOG_INFO("failed");
        return ERROR_TARGET_FAILURE;
    }
}

static void binprint(struct command_invocation *cmd, const char *text, const uint8_t *buf, int size)
{
    if (text != NULL)
        command_print_sameline(cmd, "%s", text);
    for (int i = 0; i < size; i++)
        command_print_sameline(cmd, " %02x", buf[i]);
    command_print(cmd, " ");
}

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;
    }

    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;
    }

    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;
    }

    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);

                for (size_t i = 0; i < host_bufsiz; i++) {
                    read_ref[i] = rand();
                    read_buf[i] = read_ref[i];
                }
                command_print_sameline(CMD,
                        "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, "Unsupported alignment");
                    goto next;
                } else if (retval != ERROR_OK) {
                    command_print(CMD, "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, "Pass in %fs (%0.3f KiB/s)",
                            duration_elapsed(&bench),
                            duration_kbps(&bench, count * size));
                } else {
                    command_print(CMD, "Compare failed");
                    binprint(CMD, "ref:", read_ref, host_bufsiz);
                    binprint(CMD, "buf:", read_buf, host_bufsiz);
                }
next:
                free(read_ref);
                free(read_buf);
            }
        }
    }

out:
    free(test_pattern);

    if (wa != NULL)
        target_free_working_area(target, wa);

    /* 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;
    }

    test_pattern = malloc(num_bytes);

    for (size_t i = 0; i < num_bytes; i++)
        test_pattern[i] = rand();

    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);

                for (size_t i = 0; i < host_bufsiz; i++)
                    write_buf[i] = rand();
                command_print_sameline(CMD,
                        "Test write %" PRIu32 " x %d @ %d from %saligned buffer: ", count,
                        size, offset, host_offset ? "un" : "");

                retval = target_write_memory(target, wa->address, 1, num_bytes, test_pattern);
                if (retval != ERROR_OK) {
                    command_print(CMD, "Test pattern write failed");
                    goto nextw;
                }

                /* replay on host */
                memcpy(read_ref, test_pattern, num_bytes);
                memcpy(read_ref + size + offset, write_buf + host_offset, count * size);

                struct duration bench;
                duration_start(&bench);

                retval = target_write_memory(target, wa->address + size + offset, size, count,
                        write_buf + host_offset);

                duration_measure(&bench);

                if (retval == ERROR_TARGET_UNALIGNED_ACCESS) {
                    command_print(CMD, "Unsupported alignment");
                    goto nextw;
                } else if (retval != ERROR_OK) {
                    command_print(CMD, "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, "Test pattern write failed");
                    goto nextw;
                }

                /* check result */
                int result = memcmp(read_ref, read_buf, num_bytes);
                if (result == 0) {
                    command_print(CMD, "Pass in %fs (%0.3f KiB/s)",
                            duration_elapsed(&bench),
                            duration_kbps(&bench, count * size));
                } else {
                    command_print(CMD, "Compare failed");
                    binprint(CMD, "ref:", read_ref, num_bytes);
                    binprint(CMD, "buf:", read_buf, num_bytes);
                }
nextw:
                free(read_ref);
                free(read_buf);
            }
        }
    }

    free(test_pattern);

    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",
    },
    {
        .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 = "mdd",
        .handler = handle_md_command,
        .mode = COMMAND_EXEC,
        .help = "display memory double-words",
        .usage = "['phys'] address [count]",
    },
    {
        .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 = "mwd",
        .handler = handle_mw_command,
        .mode = COMMAND_EXEC,
        .help = "write memory double-word",
        .usage = "['phys'] address value [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 = "'all' | 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_checksum",
        .handler = handle_verify_image_checksum_command,
        .mode = COMMAND_EXEC,
        .usage = "filename [offset [type]]",
    },
    {
        .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;

    retval = trace_register_commands(cmd_ctx);
    if (retval != ERROR_OK)
        return retval;


    return register_commands(cmd_ctx, NULL, target_exec_command_handlers);
}