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   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Broadcom Corporation                            *
   3  *   Evan Hunter - ehunter@broadcom.com                                    *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  17  ***************************************************************************/
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include <helper/time_support.h>
  24 #include <jtag/jtag.h>
  25 #include "target/target.h"
  26 #include "target/target_type.h"
  27 #include "rtos.h"
  28 #include "helper/log.h"
  29 #include "helper/types.h"
  30 #include "rtos_standard_stackings.h"
  31 #include "target/armv7m.h"
  32 #include "target/cortex_m.h"
  33
  34
  35
  36 #define FREERTOS_MAX_PRIORITIES 63
  37
  38 #define FreeRTOS_STRUCT(int_type, ptr_type, list_prev_offset)
  39
  40 struct FreeRTOS_params {
  41         const char *target_name;
  42         const unsigned char thread_count_width;
  43         const unsigned char pointer_width;
  44         const unsigned char list_next_offset;
  45         const unsigned char list_width;
  46         const unsigned char list_elem_next_offset;
  47         const unsigned char list_elem_content_offset;
  48         const unsigned char thread_stack_offset;
  49         const unsigned char thread_name_offset;
  50         const struct rtos_register_stacking *stacking_info_cm3;
  51         const struct rtos_register_stacking *stacking_info_cm4f;
  52         const struct rtos_register_stacking *stacking_info_cm4f_fpu;
  53 };
  54
  55 static const struct FreeRTOS_params FreeRTOS_params_list[] = {
  56         {
  57         "cortex_m",                     /* target_name */
  58         4,                                              /* thread_count_width; */
  59         4,                                              /* pointer_width; */
  60         16,                                             /* list_next_offset; */
  61         20,                                             /* list_width; */
  62         8,                                              /* list_elem_next_offset; */
  63         12,                                             /* list_elem_content_offset */
  64         0,                                              /* thread_stack_offset; */
  65         52,                                             /* thread_name_offset; */
  66         &rtos_standard_Cortex_M3_stacking,      /* stacking_info */
  67         &rtos_standard_Cortex_M4F_stacking,
  68         &rtos_standard_Cortex_M4F_FPU_stacking,
  69         },
  70         {
  71         "hla_target",                   /* target_name */
  72         4,                                              /* thread_count_width; */
  73         4,                                              /* pointer_width; */
  74         16,                                             /* list_next_offset; */
  75         20,                                             /* list_width; */
  76         8,                                              /* list_elem_next_offset; */
  77         12,                                             /* list_elem_content_offset */
  78         0,                                              /* thread_stack_offset; */
  79         52,                                             /* thread_name_offset; */
  80         &rtos_standard_Cortex_M3_stacking,      /* stacking_info */
  81         &rtos_standard_Cortex_M4F_stacking,
  82         &rtos_standard_Cortex_M4F_FPU_stacking,
  83         },
  84         {
  85         "nds32_v3",                     /* target_name */
  86         4,                                              /* thread_count_width; */
  87         4,                                              /* pointer_width; */
  88         16,                                             /* list_next_offset; */
  89         20,                                             /* list_width; */
  90         8,                                              /* list_elem_next_offset; */
  91         12,                                             /* list_elem_content_offset */
  92         0,                                              /* thread_stack_offset; */
  93         52,                                             /* thread_name_offset; */
  94         &rtos_standard_NDS32_N1068_stacking,    /* stacking_info */
  95         &rtos_standard_Cortex_M4F_stacking,
  96         &rtos_standard_Cortex_M4F_FPU_stacking,
  97         },
  98 };
  99
 100 #define FREERTOS_NUM_PARAMS ((int)(sizeof(FreeRTOS_params_list)/sizeof(struct FreeRTOS_params)))
 101
 102 static bool FreeRTOS_detect_rtos(struct target *target);
 103 static int FreeRTOS_create(struct target *target);
 104 static int FreeRTOS_update_threads(struct rtos *rtos);
 105 static int FreeRTOS_get_thread_reg_list(struct rtos *rtos, int64_t thread_id,
 106                 struct rtos_reg **reg_list, int *num_regs);
 107 static int FreeRTOS_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[]);
 108
 109 struct rtos_type FreeRTOS_rtos = {
 110         .name = "FreeRTOS",
 111
 112         .detect_rtos = FreeRTOS_detect_rtos,
 113         .create = FreeRTOS_create,
 114         .update_threads = FreeRTOS_update_threads,
 115         .get_thread_reg_list = FreeRTOS_get_thread_reg_list,
 116         .get_symbol_list_to_lookup = FreeRTOS_get_symbol_list_to_lookup,
 117 };
 118
 119 enum FreeRTOS_symbol_values {
 120         FreeRTOS_VAL_pxCurrentTCB = 0,
 121         FreeRTOS_VAL_pxReadyTasksLists = 1,
 122         FreeRTOS_VAL_xDelayedTaskList1 = 2,
 123         FreeRTOS_VAL_xDelayedTaskList2 = 3,
 124         FreeRTOS_VAL_pxDelayedTaskList = 4,
 125         FreeRTOS_VAL_pxOverflowDelayedTaskList = 5,
 126         FreeRTOS_VAL_xPendingReadyList = 6,
 127         FreeRTOS_VAL_xTasksWaitingTermination = 7,
 128         FreeRTOS_VAL_xSuspendedTaskList = 8,
 129         FreeRTOS_VAL_uxCurrentNumberOfTasks = 9,
 130         FreeRTOS_VAL_uxTopUsedPriority = 10,
 131 };
 132
 133 struct symbols {
 134         const char *name;
 135         bool optional;
 136 };
 137
 138 static const struct symbols FreeRTOS_symbol_list[] = {
 139         { "pxCurrentTCB", false },
 140         { "pxReadyTasksLists", false },
 141         { "xDelayedTaskList1", false },
 142         { "xDelayedTaskList2", false },
 143         { "pxDelayedTaskList", false },
 144         { "pxOverflowDelayedTaskList", false },
 145         { "xPendingReadyList", false },
 146         { "xTasksWaitingTermination", true }, /* Only if INCLUDE_vTaskDelete */
 147         { "xSuspendedTaskList", true }, /* Only if INCLUDE_vTaskSuspend */
 148         { "uxCurrentNumberOfTasks", false },
 149         { "uxTopUsedPriority", true }, /* Unavailable since v7.5.3 */
 150         { NULL, false }
 151 };
 152
 153 /* TODO: */
 154 /* this is not safe for little endian yet */
 155 /* may be problems reading if sizes are not 32 bit long integers. */
 156 /* test mallocs for failure */
 157
 158 static int FreeRTOS_update_threads(struct rtos *rtos)
 159 {
 160         int retval;
 161         int tasks_found = 0;
 162         const struct FreeRTOS_params *param;
 163
 164         if (rtos->rtos_specific_params == NULL)
 165                 return -1;
 166
 167         param = (const struct FreeRTOS_params *) rtos->rtos_specific_params;
 168
 169         if (rtos->symbols == NULL) {
 170                 LOG_ERROR("No symbols for FreeRTOS");
 171                 return -3;
 172         }
 173
 174         if (rtos->symbols[FreeRTOS_VAL_uxCurrentNumberOfTasks].address == 0) {
 175                 LOG_ERROR("Don't have the number of threads in FreeRTOS");
 176                 return -2;
 177         }
 178
 179         int thread_list_size = 0;
 180         retval = target_read_buffer(rtos->target,
 181                         rtos->symbols[FreeRTOS_VAL_uxCurrentNumberOfTasks].address,
 182                         param->thread_count_width,
 183                         (uint8_t *)&thread_list_size);
 184         LOG_DEBUG("FreeRTOS: Read uxCurrentNumberOfTasks at 0x%" PRIx64 ", value %d\r\n",
 185                                                                                 rtos->symbols[FreeRTOS_VAL_uxCurrentNumberOfTasks].address,
 186                                                                                 thread_list_size);
 187
 188         if (retval != ERROR_OK) {
 189                 LOG_ERROR("Could not read FreeRTOS thread count from target");
 190                 return retval;
 191         }
 192
 193         /* wipe out previous thread details if any */
 194         rtos_free_threadlist(rtos);
 195
 196         /* read the current thread */
 197         retval = target_read_buffer(rtos->target,
 198                         rtos->symbols[FreeRTOS_VAL_pxCurrentTCB].address,
 199                         param->pointer_width,
 200                         (uint8_t *)&rtos->current_thread);
 201         if (retval != ERROR_OK) {
 202                 LOG_ERROR("Error reading current thread in FreeRTOS thread list");
 203                 return retval;
 204         }
 205         LOG_DEBUG("FreeRTOS: Read pxCurrentTCB at 0x%" PRIx64 ", value 0x%" PRIx64 "\r\n",
 206                                                                                 rtos->symbols[FreeRTOS_VAL_pxCurrentTCB].address,
 207                                                                                 rtos->current_thread);
 208
 209         if ((thread_list_size  == 0) || (rtos->current_thread == 0)) {
 210                 /* Either : No RTOS threads - there is always at least the current execution though */
 211                 /* OR     : No current thread - all threads suspended - show the current execution
 212                  * of idling */
 213                 char tmp_str[] = "Current Execution";
 214                 thread_list_size++;
 215                 tasks_found++;
 216                 rtos->thread_details = malloc(
 217                                 sizeof(struct thread_detail) * thread_list_size);
 218                 if (!rtos->thread_details) {
 219                         LOG_ERROR("Error allocating memory for %d threads", thread_list_size);
 220                         return ERROR_FAIL;
 221                 }
 222                 rtos->thread_details->threadid = 1;
 223                 rtos->thread_details->exists = true;
 224                 rtos->thread_details->extra_info_str = NULL;
 225                 rtos->thread_details->thread_name_str = malloc(sizeof(tmp_str));
 226                 strcpy(rtos->thread_details->thread_name_str, tmp_str);
 227
 228                 if (thread_list_size == 1) {
 229                         rtos->thread_count = 1;
 230                         return ERROR_OK;
 231                 }
 232         } else {
 233                 /* create space for new thread details */
 234                 rtos->thread_details = malloc(
 235                                 sizeof(struct thread_detail) * thread_list_size);
 236                 if (!rtos->thread_details) {
 237                         LOG_ERROR("Error allocating memory for %d threads", thread_list_size);
 238                         return ERROR_FAIL;
 239                 }
 240         }
 241
 242         /* Find out how many lists are needed to be read from pxReadyTasksLists, */
 243         if (rtos->symbols[FreeRTOS_VAL_uxTopUsedPriority].address == 0) {
 244                 LOG_ERROR("FreeRTOS: uxTopUsedPriority is not defined, consult the OpenOCD manual for a work-around");
 245                 return ERROR_FAIL;
 246         }
 247         uint64_t top_used_priority = 0;
 248         /* FIXME: endianness error on almost all target_read_buffer(), see also
 249          * other rtoses */
 250         retval = target_read_buffer(rtos->target,
 251                         rtos->symbols[FreeRTOS_VAL_uxTopUsedPriority].address,
 252                         param->pointer_width,
 253                         (uint8_t *)&top_used_priority);
 254         if (retval != ERROR_OK)
 255                 return retval;
 256         LOG_DEBUG("FreeRTOS: Read uxTopUsedPriority at 0x%" PRIx64 ", value %" PRIu64 "\r\n",
 257                                                                                 rtos->symbols[FreeRTOS_VAL_uxTopUsedPriority].address,
 258                                                                                 top_used_priority);
 259         if (top_used_priority > FREERTOS_MAX_PRIORITIES) {
 260                 LOG_ERROR("FreeRTOS top used priority is unreasonably big, not proceeding: %" PRIu64,
 261                         top_used_priority);
 262                 return ERROR_FAIL;
 263         }
 264
 265         /* uxTopUsedPriority was defined as configMAX_PRIORITIES - 1
 266          * in old FreeRTOS versions (before V7.5.3)
 267          * Use contrib/rtos-helpers/FreeRTOS-openocd.c to get compatible symbol
 268          * in newer FreeRTOS versions.
 269          * Here we restore the original configMAX_PRIORITIES value */
 270         unsigned int config_max_priorities = top_used_priority + 1;
 271
 272         symbol_address_t *list_of_lists =
 273                 malloc(sizeof(symbol_address_t) * (config_max_priorities + 5));
 274         if (!list_of_lists) {
 275                 LOG_ERROR("Error allocating memory for %u priorities", config_max_priorities);
 276                 return ERROR_FAIL;
 277         }
 278
 279         unsigned int num_lists;
 280         for (num_lists = 0; num_lists < config_max_priorities; num_lists++)
 281                 list_of_lists[num_lists] = rtos->symbols[FreeRTOS_VAL_pxReadyTasksLists].address +
 282                         num_lists * param->list_width;
 283
 284         list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xDelayedTaskList1].address;
 285         list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xDelayedTaskList2].address;
 286         list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xPendingReadyList].address;
 287         list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xSuspendedTaskList].address;
 288         list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xTasksWaitingTermination].address;
 289
 290         for (unsigned int i = 0; i < num_lists; i++) {
 291                 if (list_of_lists[i] == 0)
 292                         continue;
 293
 294                 /* Read the number of threads in this list */
 295                 int64_t list_thread_count = 0;
 296                 retval = target_read_buffer(rtos->target,
 297                                 list_of_lists[i],
 298                                 param->thread_count_width,
 299                                 (uint8_t *)&list_thread_count);
 300                 if (retval != ERROR_OK) {
 301                         LOG_ERROR("Error reading number of threads in FreeRTOS thread list");
 302                         free(list_of_lists);
 303                         return retval;
 304                 }
 305                 LOG_DEBUG("FreeRTOS: Read thread count for list %u at 0x%" PRIx64 ", value %" PRId64 "\r\n",
 306                                                                                 i, list_of_lists[i], list_thread_count);
 307
 308                 if (list_thread_count == 0)
 309                         continue;
 310
 311                 /* Read the location of first list item */
 312                 uint64_t prev_list_elem_ptr = -1;
 313                 uint64_t list_elem_ptr = 0;
 314                 retval = target_read_buffer(rtos->target,
 315                                 list_of_lists[i] + param->list_next_offset,
 316                                 param->pointer_width,
 317                                 (uint8_t *)&list_elem_ptr);
 318                 if (retval != ERROR_OK) {
 319                         LOG_ERROR("Error reading first thread item location in FreeRTOS thread list");
 320                         free(list_of_lists);
 321                         return retval;
 322                 }
 323                 LOG_DEBUG("FreeRTOS: Read first item for list %u at 0x%" PRIx64 ", value 0x%" PRIx64 "\r\n",
 324                                                                                 i, list_of_lists[i] + param->list_next_offset, list_elem_ptr);
 325
 326                 while ((list_thread_count > 0) && (list_elem_ptr != 0) &&
 327                                 (list_elem_ptr != prev_list_elem_ptr) &&
 328                                 (tasks_found < thread_list_size)) {
 329                         /* Get the location of the thread structure. */
 330                         rtos->thread_details[tasks_found].threadid = 0;
 331                         retval = target_read_buffer(rtos->target,
 332                                         list_elem_ptr + param->list_elem_content_offset,
 333                                         param->pointer_width,
 334                                         (uint8_t *)&(rtos->thread_details[tasks_found].threadid));
 335                         if (retval != ERROR_OK) {
 336                                 LOG_ERROR("Error reading thread list item object in FreeRTOS thread list");
 337                                 free(list_of_lists);
 338                                 return retval;
 339                         }
 340                         LOG_DEBUG("FreeRTOS: Read Thread ID at 0x%" PRIx64 ", value 0x%" PRIx64 "\r\n",
 341                                                                                 list_elem_ptr + param->list_elem_content_offset,
 342                                                                                 rtos->thread_details[tasks_found].threadid);
 343
 344                         /* get thread name */
 345
 346                         #define FREERTOS_THREAD_NAME_STR_SIZE (200)
 347                         char tmp_str[FREERTOS_THREAD_NAME_STR_SIZE];
 348
 349                         /* Read the thread name */
 350                         retval = target_read_buffer(rtos->target,
 351                                         rtos->thread_details[tasks_found].threadid + param->thread_name_offset,
 352                                         FREERTOS_THREAD_NAME_STR_SIZE,
 353                                         (uint8_t *)&tmp_str);
 354                         if (retval != ERROR_OK) {
 355                                 LOG_ERROR("Error reading first thread item location in FreeRTOS thread list");
 356                                 free(list_of_lists);
 357                                 return retval;
 358                         }
 359                         tmp_str[FREERTOS_THREAD_NAME_STR_SIZE-1] = '\x00';
 360                         LOG_DEBUG("FreeRTOS: Read Thread Name at 0x%" PRIx64 ", value \"%s\"\r\n",
 361                                                                                 rtos->thread_details[tasks_found].threadid + param->thread_name_offset,
 362                                                                                 tmp_str);
 363
 364                         if (tmp_str[0] == '\x00')
 365                                 strcpy(tmp_str, "No Name");
 366
 367                         rtos->thread_details[tasks_found].thread_name_str =
 368                                 malloc(strlen(tmp_str)+1);
 369                         strcpy(rtos->thread_details[tasks_found].thread_name_str, tmp_str);
 370                         rtos->thread_details[tasks_found].exists = true;
 371
 372                         if (rtos->thread_details[tasks_found].threadid == rtos->current_thread) {
 373                                 char running_str[] = "State: Running";
 374                                 rtos->thread_details[tasks_found].extra_info_str = malloc(
 375                                                 sizeof(running_str));
 376                                 strcpy(rtos->thread_details[tasks_found].extra_info_str,
 377                                         running_str);
 378                         } else
 379                                 rtos->thread_details[tasks_found].extra_info_str = NULL;
 380
 381                         tasks_found++;
 382                         list_thread_count--;
 383
 384                         prev_list_elem_ptr = list_elem_ptr;
 385                         list_elem_ptr = 0;
 386                         retval = target_read_buffer(rtos->target,
 387                                         prev_list_elem_ptr + param->list_elem_next_offset,
 388                                         param->pointer_width,
 389                                         (uint8_t *)&list_elem_ptr);
 390                         if (retval != ERROR_OK) {
 391                                 LOG_ERROR("Error reading next thread item location in FreeRTOS thread list");
 392                                 free(list_of_lists);
 393                                 return retval;
 394                         }
 395                         LOG_DEBUG("FreeRTOS: Read next thread location at 0x%" PRIx64 ", value 0x%" PRIx64 "\r\n",
 396                                                                                 prev_list_elem_ptr + param->list_elem_next_offset,
 397                                                                                 list_elem_ptr);
 398                 }
 399         }
 400
 401         free(list_of_lists);
 402         rtos->thread_count = tasks_found;
 403         return 0;
 404 }
 405
 406 static int FreeRTOS_get_thread_reg_list(struct rtos *rtos, int64_t thread_id,
 407                 struct rtos_reg **reg_list, int *num_regs)
 408 {
 409         int retval;
 410         const struct FreeRTOS_params *param;
 411         int64_t stack_ptr = 0;
 412
 413         if (rtos == NULL)
 414                 return -1;
 415
 416         if (thread_id == 0)
 417                 return -2;
 418
 419         if (rtos->rtos_specific_params == NULL)
 420                 return -1;
 421
 422         param = (const struct FreeRTOS_params *) rtos->rtos_specific_params;
 423
 424         /* Read the stack pointer */
 425         retval = target_read_buffer(rtos->target,
 426                         thread_id + param->thread_stack_offset,
 427                         param->pointer_width,
 428                         (uint8_t *)&stack_ptr);
 429         if (retval != ERROR_OK) {
 430                 LOG_ERROR("Error reading stack frame from FreeRTOS thread");
 431                 return retval;
 432         }
 433         LOG_DEBUG("FreeRTOS: Read stack pointer at 0x%" PRIx64 ", value 0x%" PRIx64 "\r\n",
 434                                                                                 thread_id + param->thread_stack_offset,
 435                                                                                 stack_ptr);
 436
 437         /* Check for armv7m with *enabled* FPU, i.e. a Cortex-M4F */
 438         int cm4_fpu_enabled = 0;
 439         struct armv7m_common *armv7m_target = target_to_armv7m(rtos->target);
 440         if (is_armv7m(armv7m_target)) {
 441                 if (armv7m_target->fp_feature == FPv4_SP) {
 442                         /* Found ARM v7m target which includes a FPU */
 443                         uint32_t cpacr;
 444
 445                         retval = target_read_u32(rtos->target, FPU_CPACR, &cpacr);
 446                         if (retval != ERROR_OK) {
 447                                 LOG_ERROR("Could not read CPACR register to check FPU state");
 448                                 return -1;
 449                         }
 450
 451                         /* Check if CP10 and CP11 are set to full access. */
 452                         if (cpacr & 0x00F00000) {
 453                                 /* Found target with enabled FPU */
 454                                 cm4_fpu_enabled = 1;
 455                         }
 456                 }
 457         }
 458
 459         if (cm4_fpu_enabled == 1) {
 460                 /* Read the LR to decide between stacking with or without FPU */
 461                 uint32_t LR_svc = 0;
 462                 retval = target_read_buffer(rtos->target,
 463                                 stack_ptr + 0x20,
 464                                 param->pointer_width,
 465                                 (uint8_t *)&LR_svc);
 466                 if (retval != ERROR_OK) {
 467                         LOG_OUTPUT("Error reading stack frame from FreeRTOS thread\r\n");
 468                         return retval;
 469                 }
 470                 if ((LR_svc & 0x10) == 0)
 471                         return rtos_generic_stack_read(rtos->target, param->stacking_info_cm4f_fpu, stack_ptr, reg_list, num_regs);
 472                 else
 473                         return rtos_generic_stack_read(rtos->target, param->stacking_info_cm4f, stack_ptr, reg_list, num_regs);
 474         } else
 475                 return rtos_generic_stack_read(rtos->target, param->stacking_info_cm3, stack_ptr, reg_list, num_regs);
 476 }
 477
 478 static int FreeRTOS_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[])
 479 {
 480         unsigned int i;
 481         *symbol_list = calloc(
 482                         ARRAY_SIZE(FreeRTOS_symbol_list), sizeof(symbol_table_elem_t));
 483
 484         for (i = 0; i < ARRAY_SIZE(FreeRTOS_symbol_list); i++) {
 485                 (*symbol_list)[i].symbol_name = FreeRTOS_symbol_list[i].name;
 486                 (*symbol_list)[i].optional = FreeRTOS_symbol_list[i].optional;
 487         }
 488
 489         return 0;
 490 }
 491
 492 #if 0
 493
 494 static int FreeRTOS_set_current_thread(struct rtos *rtos, threadid_t thread_id)
 495 {
 496         return 0;
 497 }
 498
 499 static int FreeRTOS_get_thread_ascii_info(struct rtos *rtos, threadid_t thread_id, char **info)
 500 {
 501         int retval;
 502         const struct FreeRTOS_params *param;
 503
 504         if (rtos == NULL)
 505                 return -1;
 506
 507         if (thread_id == 0)
 508                 return -2;
 509
 510         if (rtos->rtos_specific_params == NULL)
 511                 return -3;
 512
 513         param = (const struct FreeRTOS_params *) rtos->rtos_specific_params;
 514
 515 #define FREERTOS_THREAD_NAME_STR_SIZE (200)
 516         char tmp_str[FREERTOS_THREAD_NAME_STR_SIZE];
 517
 518         /* Read the thread name */
 519         retval = target_read_buffer(rtos->target,
 520                         thread_id + param->thread_name_offset,
 521                         FREERTOS_THREAD_NAME_STR_SIZE,
 522                         (uint8_t *)&tmp_str);
 523         if (retval != ERROR_OK) {
 524                 LOG_ERROR("Error reading first thread item location in FreeRTOS thread list");
 525                 return retval;
 526         }
 527         tmp_str[FREERTOS_THREAD_NAME_STR_SIZE-1] = '\x00';
 528
 529         if (tmp_str[0] == '\x00')
 530                 strcpy(tmp_str, "No Name");
 531
 532         *info = malloc(strlen(tmp_str)+1);
 533         strcpy(*info, tmp_str);
 534         return 0;
 535 }
 536
 537 #endif
 538
 539 static bool FreeRTOS_detect_rtos(struct target *target)
 540 {
 541         if ((target->rtos->symbols != NULL) &&
 542                         (target->rtos->symbols[FreeRTOS_VAL_pxReadyTasksLists].address != 0)) {
 543                 /* looks like FreeRTOS */
 544                 return true;
 545         }
 546         return false;
 547 }
 548
 549 static int FreeRTOS_create(struct target *target)
 550 {
 551         int i = 0;
 552         while ((i < FREERTOS_NUM_PARAMS) &&
 553                         (0 != strcmp(FreeRTOS_params_list[i].target_name, target->type->name))) {
 554                 i++;
 555         }
 556         if (i >= FREERTOS_NUM_PARAMS) {
 557                 LOG_ERROR("Could not find target in FreeRTOS compatibility list");
 558                 return -1;
 559         }
 560
 561         target->rtos->rtos_specific_params = (void *) &FreeRTOS_params_list[i];
 562         return 0;
 563 }