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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 "rtos.h"
  24 #include "target/target.h"
  25 #include "helper/log.h"
  26 #include "helper/binarybuffer.h"
  27 #include "server/gdb_server.h"
  28
  29 /* RTOSs */
  30 extern struct rtos_type FreeRTOS_rtos;
  31 extern struct rtos_type ThreadX_rtos;
  32 extern struct rtos_type eCos_rtos;
  33 extern struct rtos_type Linux_os;
  34 extern struct rtos_type ChibiOS_rtos;
  35 extern struct rtos_type chromium_ec_rtos;
  36 extern struct rtos_type embKernel_rtos;
  37 extern struct rtos_type mqx_rtos;
  38 extern struct rtos_type uCOS_III_rtos;
  39 extern struct rtos_type nuttx_rtos;
  40
  41 static struct rtos_type *rtos_types[] = {
  42         &ThreadX_rtos,
  43         &FreeRTOS_rtos,
  44         &eCos_rtos,
  45         &Linux_os,
  46         &ChibiOS_rtos,
  47         &chromium_ec_rtos,
  48         &embKernel_rtos,
  49         &mqx_rtos,
  50         &uCOS_III_rtos,
  51         &nuttx_rtos,
  52         NULL
  53 };
  54
  55 int rtos_thread_packet(struct connection *connection, const char *packet, int packet_size);
  56
  57 int rtos_smp_init(struct target *target)
  58 {
  59         if (target->rtos->type->smp_init)
  60                 return target->rtos->type->smp_init(target);
  61         return ERROR_TARGET_INIT_FAILED;
  62 }
  63
  64 static int rtos_target_for_threadid(struct connection *connection, int64_t threadid, struct target **t)
  65 {
  66         struct target *curr = get_target_from_connection(connection);
  67         if (t)
  68                 *t = curr;
  69
  70         return ERROR_OK;
  71 }
  72
  73 static int os_alloc(struct target *target, struct rtos_type *ostype)
  74 {
  75         struct rtos *os = target->rtos = calloc(1, sizeof(struct rtos));
  76
  77         if (!os)
  78                 return JIM_ERR;
  79
  80         os->type = ostype;
  81         os->current_threadid = -1;
  82         os->current_thread = 0;
  83         os->symbols = NULL;
  84         os->target = target;
  85
  86         /* RTOS drivers can override the packet handler in _create(). */
  87         os->gdb_thread_packet = rtos_thread_packet;
  88         os->gdb_target_for_threadid = rtos_target_for_threadid;
  89
  90         return JIM_OK;
  91 }
  92
  93 static void os_free(struct target *target)
  94 {
  95         if (!target->rtos)
  96                 return;
  97
  98         if (target->rtos->symbols)
  99                 free(target->rtos->symbols);
 100
 101         free(target->rtos);
 102         target->rtos = NULL;
 103 }
 104
 105 static int os_alloc_create(struct target *target, struct rtos_type *ostype)
 106 {
 107         int ret = os_alloc(target, ostype);
 108
 109         if (JIM_OK == ret) {
 110                 ret = target->rtos->type->create(target);
 111                 if (ret != JIM_OK)
 112                         os_free(target);
 113         }
 114
 115         return ret;
 116 }
 117
 118 int rtos_create(Jim_GetOptInfo *goi, struct target *target)
 119 {
 120         int x;
 121         const char *cp;
 122         struct Jim_Obj *res;
 123         int e;
 124
 125         if (!goi->isconfigure && goi->argc != 0) {
 126                 Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "NO PARAMS");
 127                 return JIM_ERR;
 128         }
 129
 130         os_free(target);
 131
 132         e = Jim_GetOpt_String(goi, &cp, NULL);
 133         if (e != JIM_OK)
 134                 return e;
 135
 136         if (0 == strcmp(cp, "auto")) {
 137                 /* Auto detect tries to look up all symbols for each RTOS,
 138                  * and runs the RTOS driver's _detect() function when GDB
 139                  * finds all symbols for any RTOS. See rtos_qsymbol(). */
 140                 target->rtos_auto_detect = true;
 141
 142                 /* rtos_qsymbol() will iterate over all RTOSes. Allocate
 143                  * target->rtos here, and set it to the first RTOS type. */
 144                 return os_alloc(target, rtos_types[0]);
 145         }
 146
 147         for (x = 0; rtos_types[x]; x++)
 148                 if (0 == strcmp(cp, rtos_types[x]->name))
 149                         return os_alloc_create(target, rtos_types[x]);
 150
 151         Jim_SetResultFormatted(goi->interp, "Unknown RTOS type %s, try one of: ", cp);
 152         res = Jim_GetResult(goi->interp);
 153         for (x = 0; rtos_types[x]; x++)
 154                 Jim_AppendStrings(goi->interp, res, rtos_types[x]->name, ", ", NULL);
 155         Jim_AppendStrings(goi->interp, res, " or auto", NULL);
 156
 157         return JIM_ERR;
 158 }
 159
 160 int gdb_thread_packet(struct connection *connection, char const *packet, int packet_size)
 161 {
 162         struct target *target = get_target_from_connection(connection);
 163         if (target->rtos == NULL)
 164                 return rtos_thread_packet(connection, packet, packet_size);     /* thread not
 165                                                                                  *found*/
 166         return target->rtos->gdb_thread_packet(connection, packet, packet_size);
 167 }
 168
 169 static symbol_table_elem_t *next_symbol(struct rtos *os, char *cur_symbol, uint64_t cur_addr)
 170 {
 171         symbol_table_elem_t *s;
 172
 173         if (!os->symbols)
 174                 os->type->get_symbol_list_to_lookup(&os->symbols);
 175
 176         if (!cur_symbol[0])
 177                 return &os->symbols[0];
 178
 179         for (s = os->symbols; s->symbol_name; s++)
 180                 if (!strcmp(s->symbol_name, cur_symbol)) {
 181                         s->address = cur_addr;
 182                         s++;
 183                         return s;
 184                 }
 185
 186         return NULL;
 187 }
 188
 189 /* searches for 'symbol' in the lookup table for 'os' and returns TRUE,
 190  * if 'symbol' is not declared optional */
 191 static bool is_symbol_mandatory(const struct rtos *os, const char *symbol)
 192 {
 193         for (symbol_table_elem_t *s = os->symbols; s->symbol_name; ++s) {
 194                 if (!strcmp(s->symbol_name, symbol))
 195                         return !s->optional;
 196         }
 197         return false;
 198 }
 199
 200 /* rtos_qsymbol() processes and replies to all qSymbol packets from GDB.
 201  *
 202  * GDB sends a qSymbol:: packet (empty address, empty name) to notify
 203  * that it can now answer qSymbol::hexcodedname queries, to look up symbols.
 204  *
 205  * If the qSymbol packet has no address that means GDB did not find the
 206  * symbol, in which case auto-detect will move on to try the next RTOS.
 207  *
 208  * rtos_qsymbol() then calls the next_symbol() helper function, which
 209  * iterates over symbol names for the current RTOS until it finds the
 210  * symbol in the received GDB packet, and then returns the next entry
 211  * in the list of symbols.
 212  *
 213  * If GDB replied about the last symbol for the RTOS and the RTOS was
 214  * specified explicitly, then no further symbol lookup is done. When
 215  * auto-detecting, the RTOS driver _detect() function must return success.
 216  *
 217  * rtos_qsymbol() returns 1 if an RTOS has been detected, or 0 otherwise.
 218  */
 219 int rtos_qsymbol(struct connection *connection, char const *packet, int packet_size)
 220 {
 221         int rtos_detected = 0;
 222         uint64_t addr = 0;
 223         size_t reply_len;
 224         char reply[GDB_BUFFER_SIZE], cur_sym[GDB_BUFFER_SIZE / 2] = "";
 225         symbol_table_elem_t *next_sym = NULL;
 226         struct target *target = get_target_from_connection(connection);
 227         struct rtos *os = target->rtos;
 228
 229         reply_len = sprintf(reply, "OK");
 230
 231         if (!os)
 232                 goto done;
 233
 234         /* Decode any symbol name in the packet*/
 235         size_t len = unhexify((uint8_t *)cur_sym, strchr(packet + 8, ':') + 1, strlen(strchr(packet + 8, ':') + 1));
 236         cur_sym[len] = 0;
 237
 238         if ((strcmp(packet, "qSymbol::") != 0) &&               /* GDB is not offering symbol lookup for the first time */
 239             (!sscanf(packet, "qSymbol:%" SCNx64 ":", &addr)) && /* GDB did not find an address for a symbol */
 240             is_symbol_mandatory(os, cur_sym)) {                                 /* the symbol is mandatory for this RTOS */
 241
 242                 /* GDB could not find an address for the previous symbol */
 243                 if (!target->rtos_auto_detect) {
 244                         LOG_WARNING("RTOS %s not detected. (GDB could not find symbol \'%s\')", os->type->name, cur_sym);
 245                         goto done;
 246                 } else {
 247                         /* Autodetecting RTOS - try next RTOS */
 248                         if (!rtos_try_next(target)) {
 249                                 LOG_WARNING("No RTOS could be auto-detected!");
 250                                 goto done;
 251                         }
 252
 253                         /* Next RTOS selected - invalidate current symbol */
 254                         cur_sym[0] = '\x00';
 255                 }
 256         }
 257         next_sym = next_symbol(os, cur_sym, addr);
 258
 259         if (!next_sym->symbol_name) {
 260                 /* No more symbols need looking up */
 261
 262                 if (!target->rtos_auto_detect) {
 263                         rtos_detected = 1;
 264                         goto done;
 265                 }
 266
 267                 if (os->type->detect_rtos(target)) {
 268                         LOG_INFO("Auto-detected RTOS: %s", os->type->name);
 269                         rtos_detected = 1;
 270                         goto done;
 271                 } else {
 272                         LOG_WARNING("No RTOS could be auto-detected!");
 273                         goto done;
 274                 }
 275         }
 276
 277         if (8 + (strlen(next_sym->symbol_name) * 2) + 1 > sizeof(reply)) {
 278                 LOG_ERROR("ERROR: RTOS symbol '%s' name is too long for GDB!", next_sym->symbol_name);
 279                 goto done;
 280         }
 281
 282         reply_len = snprintf(reply, sizeof(reply), "qSymbol:");
 283         reply_len += hexify(reply + reply_len,
 284                 (const uint8_t *)next_sym->symbol_name, strlen(next_sym->symbol_name),
 285                 sizeof(reply) - reply_len);
 286
 287 done:
 288         gdb_put_packet(connection, reply, reply_len);
 289         return rtos_detected;
 290 }
 291
 292 int rtos_thread_packet(struct connection *connection, char const *packet, int packet_size)
 293 {
 294         struct target *target = get_target_from_connection(connection);
 295
 296         if (strncmp(packet, "qThreadExtraInfo,", 17) == 0) {
 297                 if ((target->rtos != NULL) && (target->rtos->thread_details != NULL) &&
 298                                 (target->rtos->thread_count != 0)) {
 299                         threadid_t threadid = 0;
 300                         int found = -1;
 301                         sscanf(packet, "qThreadExtraInfo,%" SCNx64, &threadid);
 302
 303                         if ((target->rtos != NULL) && (target->rtos->thread_details != NULL)) {
 304                                 int thread_num;
 305                                 for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
 306                                         if (target->rtos->thread_details[thread_num].threadid == threadid) {
 307                                                 if (target->rtos->thread_details[thread_num].exists)
 308                                                         found = thread_num;
 309                                         }
 310                                 }
 311                         }
 312                         if (found == -1) {
 313                                 gdb_put_packet(connection, "E01", 3);   /* thread not found */
 314                                 return ERROR_OK;
 315                         }
 316
 317                         struct thread_detail *detail = &target->rtos->thread_details[found];
 318
 319                         int str_size = 0;
 320                         if (detail->thread_name_str != NULL)
 321                                 str_size += strlen(detail->thread_name_str);
 322                         if (detail->extra_info_str != NULL)
 323                                 str_size += strlen(detail->extra_info_str);
 324
 325                         char *tmp_str = calloc(str_size + 9, sizeof(char));
 326                         char *tmp_str_ptr = tmp_str;
 327
 328                         if (detail->thread_name_str != NULL)
 329                                 tmp_str_ptr += sprintf(tmp_str_ptr, "Name: %s", detail->thread_name_str);
 330                         if (detail->extra_info_str != NULL) {
 331                                 if (tmp_str_ptr != tmp_str)
 332                                         tmp_str_ptr += sprintf(tmp_str_ptr, ", ");
 333                                 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", detail->extra_info_str);
 334                         }
 335
 336                         assert(strlen(tmp_str) ==
 337                                 (size_t) (tmp_str_ptr - tmp_str));
 338
 339                         char *hex_str = malloc(strlen(tmp_str) * 2 + 1);
 340                         size_t pkt_len = hexify(hex_str, (const uint8_t *)tmp_str,
 341                                 strlen(tmp_str), strlen(tmp_str) * 2 + 1);
 342
 343                         gdb_put_packet(connection, hex_str, pkt_len);
 344                         free(hex_str);
 345                         free(tmp_str);
 346                         return ERROR_OK;
 347
 348                 }
 349                 gdb_put_packet(connection, "", 0);
 350                 return ERROR_OK;
 351         } else if (strncmp(packet, "qSymbol", 7) == 0) {
 352                 if (rtos_qsymbol(connection, packet, packet_size) == 1) {
 353                         if (target->rtos_auto_detect == true) {
 354                                 target->rtos_auto_detect = false;
 355                                 target->rtos->type->create(target);
 356                         }
 357                         target->rtos->type->update_threads(target->rtos);
 358                 }
 359                 return ERROR_OK;
 360         } else if (strncmp(packet, "qfThreadInfo", 12) == 0) {
 361                 int i;
 362                 if (target->rtos != NULL) {
 363                         if (target->rtos->thread_count == 0) {
 364                                 gdb_put_packet(connection, "l", 1);
 365                         } else {
 366                                 /*thread id are 16 char +1 for ',' */
 367                                 char *out_str = malloc(17 * target->rtos->thread_count + 1);
 368                                 char *tmp_str = out_str;
 369                                 for (i = 0; i < target->rtos->thread_count; i++) {
 370                                         tmp_str += sprintf(tmp_str, "%c%016" PRIx64, i == 0 ? 'm' : ',',
 371                                                                                 target->rtos->thread_details[i].threadid);
 372                                 }
 373                                 gdb_put_packet(connection, out_str, strlen(out_str));
 374                                 free(out_str);
 375                         }
 376                 } else
 377                         gdb_put_packet(connection, "l", 1);
 378
 379                 return ERROR_OK;
 380         } else if (strncmp(packet, "qsThreadInfo", 12) == 0) {
 381                 gdb_put_packet(connection, "l", 1);
 382                 return ERROR_OK;
 383         } else if (strncmp(packet, "qAttached", 9) == 0) {
 384                 gdb_put_packet(connection, "1", 1);
 385                 return ERROR_OK;
 386         } else if (strncmp(packet, "qOffsets", 8) == 0) {
 387                 char offsets[] = "Text=0;Data=0;Bss=0";
 388                 gdb_put_packet(connection, offsets, sizeof(offsets)-1);
 389                 return ERROR_OK;
 390         } else if (strncmp(packet, "qCRC:", 5) == 0) {
 391                 /* make sure we check this before "qC" packet below
 392                  * otherwise it gets incorrectly handled */
 393                 return GDB_THREAD_PACKET_NOT_CONSUMED;
 394         } else if (strncmp(packet, "qC", 2) == 0) {
 395                 if (target->rtos != NULL) {
 396                         char buffer[19];
 397                         int size;
 398                         size = snprintf(buffer, 19, "QC%016" PRIx64, target->rtos->current_thread);
 399                         gdb_put_packet(connection, buffer, size);
 400                 } else
 401                         gdb_put_packet(connection, "QC0", 3);
 402                 return ERROR_OK;
 403         } else if (packet[0] == 'T') {  /* Is thread alive? */
 404                 threadid_t threadid;
 405                 int found = -1;
 406                 sscanf(packet, "T%" SCNx64, &threadid);
 407                 if ((target->rtos != NULL) && (target->rtos->thread_details != NULL)) {
 408                         int thread_num;
 409                         for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
 410                                 if (target->rtos->thread_details[thread_num].threadid == threadid) {
 411                                         if (target->rtos->thread_details[thread_num].exists)
 412                                                 found = thread_num;
 413                                 }
 414                         }
 415                 }
 416                 if (found != -1)
 417                         gdb_put_packet(connection, "OK", 2);    /* thread alive */
 418                 else
 419                         gdb_put_packet(connection, "E01", 3);   /* thread not found */
 420                 return ERROR_OK;
 421         } else if (packet[0] == 'H') {  /* Set current thread ( 'c' for step and continue, 'g' for
 422                                          * all other operations ) */
 423                 if ((packet[1] == 'g') && (target->rtos != NULL)) {
 424                         threadid_t threadid;
 425                         sscanf(packet, "Hg%16" SCNx64, &threadid);
 426                         LOG_DEBUG("RTOS: GDB requested to set current thread to 0x%" PRIx64, threadid);
 427                         /* threadid of 0 indicates target should choose */
 428                         if (threadid == 0)
 429                                 target->rtos->current_threadid = target->rtos->current_thread;
 430                         else
 431                                 target->rtos->current_threadid = threadid;
 432                 }
 433                 gdb_put_packet(connection, "OK", 2);
 434                 return ERROR_OK;
 435         }
 436
 437         return GDB_THREAD_PACKET_NOT_CONSUMED;
 438 }
 439
 440 static int rtos_put_gdb_reg_list(struct connection *connection,
 441                 struct rtos_reg *reg_list, int num_regs)
 442 {
 443         size_t num_bytes = 1; /* NUL */
 444         for (int i = 0; i < num_regs; ++i)
 445                 num_bytes += DIV_ROUND_UP(reg_list[i].size, 8) * 2;
 446
 447         char *hex = malloc(num_bytes);
 448         char *hex_p = hex;
 449
 450         for (int i = 0; i < num_regs; ++i) {
 451                 size_t count = DIV_ROUND_UP(reg_list[i].size, 8);
 452                 size_t n = hexify(hex_p, reg_list[i].value, count, num_bytes);
 453                 hex_p += n;
 454                 num_bytes -= n;
 455         }
 456
 457         gdb_put_packet(connection, hex, strlen(hex));
 458         free(hex);
 459
 460         return ERROR_OK;
 461 }
 462
 463 int rtos_get_gdb_reg(struct connection *connection, int reg_num)
 464 {
 465         struct target *target = get_target_from_connection(connection);
 466         int64_t current_threadid = target->rtos->current_threadid;
 467         if ((target->rtos != NULL) && (current_threadid != -1) &&
 468                         (current_threadid != 0) &&
 469                         ((current_threadid != target->rtos->current_thread) ||
 470                         (target->smp))) {       /* in smp several current thread are possible */
 471                 struct rtos_reg *reg_list;
 472                 int num_regs;
 473
 474                 LOG_DEBUG("RTOS: getting register %d for thread 0x%" PRIx64
 475                                   ", target->rtos->current_thread=0x%" PRIx64 "\r\n",
 476                                                                                 reg_num,
 477                                                                                 current_threadid,
 478                                                                                 target->rtos->current_thread);
 479
 480                 int retval = target->rtos->type->get_thread_reg_list(target->rtos,
 481                                 current_threadid,
 482                                 &reg_list,
 483                                 &num_regs);
 484                 if (retval != ERROR_OK) {
 485                         LOG_ERROR("RTOS: failed to get register list");
 486                         return retval;
 487                 }
 488
 489                 for (int i = 0; i < num_regs; ++i) {
 490                         if (reg_list[i].number == (uint32_t)reg_num) {
 491                                 rtos_put_gdb_reg_list(connection, reg_list + i, 1);
 492                                 free(reg_list);
 493                                 return ERROR_OK;
 494                         }
 495                 }
 496
 497                 free(reg_list);
 498         }
 499         return ERROR_FAIL;
 500 }
 501
 502 int rtos_get_gdb_reg_list(struct connection *connection)
 503 {
 504         struct target *target = get_target_from_connection(connection);
 505         int64_t current_threadid = target->rtos->current_threadid;
 506         if ((target->rtos != NULL) && (current_threadid != -1) &&
 507                         (current_threadid != 0) &&
 508                         ((current_threadid != target->rtos->current_thread) ||
 509                         (target->smp))) {       /* in smp several current thread are possible */
 510                 struct rtos_reg *reg_list;
 511                 int num_regs;
 512
 513                 LOG_DEBUG("RTOS: getting register list for thread 0x%" PRIx64
 514                                   ", target->rtos->current_thread=0x%" PRIx64 "\r\n",
 515                                                                                 current_threadid,
 516                                                                                 target->rtos->current_thread);
 517
 518                 int retval = target->rtos->type->get_thread_reg_list(target->rtos,
 519                                 current_threadid,
 520                                 &reg_list,
 521                                 &num_regs);
 522                 if (retval != ERROR_OK) {
 523                         LOG_ERROR("RTOS: failed to get register list");
 524                         return retval;
 525                 }
 526
 527                 rtos_put_gdb_reg_list(connection, reg_list, num_regs);
 528                 free(reg_list);
 529
 530                 return ERROR_OK;
 531         }
 532         return ERROR_FAIL;
 533 }
 534
 535 int rtos_generic_stack_read(struct target *target,
 536         const struct rtos_register_stacking *stacking,
 537         int64_t stack_ptr,
 538         struct rtos_reg **reg_list,
 539         int *num_regs)
 540 {
 541         int retval;
 542
 543         if (stack_ptr == 0) {
 544                 LOG_ERROR("Error: null stack pointer in thread");
 545                 return -5;
 546         }
 547         /* Read the stack */
 548         uint8_t *stack_data = malloc(stacking->stack_registers_size);
 549         uint32_t address = stack_ptr;
 550
 551         if (stacking->stack_growth_direction == 1)
 552                 address -= stacking->stack_registers_size;
 553         retval = target_read_buffer(target, address, stacking->stack_registers_size, stack_data);
 554         if (retval != ERROR_OK) {
 555                 free(stack_data);
 556                 LOG_ERROR("Error reading stack frame from thread");
 557                 return retval;
 558         }
 559         LOG_DEBUG("RTOS: Read stack frame at 0x%" PRIx32, address);
 560
 561 #if 0
 562                 LOG_OUTPUT("Stack Data :");
 563                 for (i = 0; i < stacking->stack_registers_size; i++)
 564                         LOG_OUTPUT("%02X", stack_data[i]);
 565                 LOG_OUTPUT("\r\n");
 566 #endif
 567
 568         int64_t new_stack_ptr;
 569         if (stacking->calculate_process_stack != NULL) {
 570                 new_stack_ptr = stacking->calculate_process_stack(target,
 571                                 stack_data, stacking, stack_ptr);
 572         } else {
 573                 new_stack_ptr = stack_ptr - stacking->stack_growth_direction *
 574                         stacking->stack_registers_size;
 575         }
 576
 577         *reg_list = calloc(stacking->num_output_registers, sizeof(struct rtos_reg));
 578         *num_regs = stacking->num_output_registers;
 579
 580         for (int i = 0; i < stacking->num_output_registers; ++i) {
 581                 (*reg_list)[i].number = stacking->register_offsets[i].number;
 582                 (*reg_list)[i].size = stacking->register_offsets[i].width_bits;
 583
 584                 int offset = stacking->register_offsets[i].offset;
 585                 if (offset == -2)
 586                         buf_cpy(&new_stack_ptr, (*reg_list)[i].value, (*reg_list)[i].size);
 587                 else if (offset != -1)
 588                         buf_cpy(stack_data + offset, (*reg_list)[i].value, (*reg_list)[i].size);
 589         }
 590
 591         free(stack_data);
 592 /*      LOG_OUTPUT("Output register string: %s\r\n", *hex_reg_list); */
 593         return ERROR_OK;
 594 }
 595
 596 int rtos_try_next(struct target *target)
 597 {
 598         struct rtos *os = target->rtos;
 599         struct rtos_type **type = rtos_types;
 600
 601         if (!os)
 602                 return 0;
 603
 604         while (*type && os->type != *type)
 605                 type++;
 606
 607         if (!*type || !*(++type))
 608                 return 0;
 609
 610         os->type = *type;
 611         if (os->symbols) {
 612                 free(os->symbols);
 613                 os->symbols = NULL;
 614         }
 615
 616         return 1;
 617 }
 618
 619 int rtos_update_threads(struct target *target)
 620 {
 621         if ((target->rtos != NULL) && (target->rtos->type != NULL))
 622                 target->rtos->type->update_threads(target->rtos);
 623         return ERROR_OK;
 624 }
 625
 626 void rtos_free_threadlist(struct rtos *rtos)
 627 {
 628         if (rtos->thread_details) {
 629                 int j;
 630
 631                 for (j = 0; j < rtos->thread_count; j++) {
 632                         struct thread_detail *current_thread = &rtos->thread_details[j];
 633                         free(current_thread->thread_name_str);
 634                         free(current_thread->extra_info_str);
 635                 }
 636                 free(rtos->thread_details);
 637                 rtos->thread_details = NULL;
 638                 rtos->thread_count = 0;
 639                 rtos->current_threadid = -1;
 640                 rtos->current_thread = 0;
 641         }
 642 }