git.gag.com Git - fw/openocd/blob - src/rtos/rtos.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2011 by Broadcom Corporation                            *
   5  *   Evan Hunter - ehunter@broadcom.com                                    *
   6  ***************************************************************************/
   7
   8 #ifdef HAVE_CONFIG_H
   9 #include "config.h"
  10 #endif
  11
  12 #include "rtos.h"
  13 #include "target/target.h"
  14 #include "helper/log.h"
  15 #include "helper/binarybuffer.h"
  16 #include "server/gdb_server.h"
  17
  18 /* RTOSs */
  19 extern struct rtos_type freertos_rtos;
  20 extern struct rtos_type threadx_rtos;
  21 extern struct rtos_type ecos_rtos;
  22 extern struct rtos_type linux_rtos;
  23 extern struct rtos_type chibios_rtos;
  24 extern struct rtos_type chromium_ec_rtos;
  25 extern struct rtos_type embkernel_rtos;
  26 extern struct rtos_type mqx_rtos;
  27 extern struct rtos_type ucos_iii_rtos;
  28 extern struct rtos_type nuttx_rtos;
  29 extern struct rtos_type hwthread_rtos;
  30 extern struct rtos_type riot_rtos;
  31 extern struct rtos_type zephyr_rtos;
  32
  33 static struct rtos_type *rtos_types[] = {
  34         &threadx_rtos,
  35         &freertos_rtos,
  36         &ecos_rtos,
  37         &linux_rtos,
  38         &chibios_rtos,
  39         &chromium_ec_rtos,
  40         &embkernel_rtos,
  41         &mqx_rtos,
  42         &ucos_iii_rtos,
  43         &nuttx_rtos,
  44         &riot_rtos,
  45         &zephyr_rtos,
  46         /* keep this as last, as it always matches with rtos auto */
  47         &hwthread_rtos,
  48         NULL
  49 };
  50
  51 static int rtos_try_next(struct target *target);
  52
  53 int rtos_thread_packet(struct connection *connection, const char *packet, int packet_size);
  54
  55 int rtos_smp_init(struct target *target)
  56 {
  57         if (target->rtos->type->smp_init)
  58                 return target->rtos->type->smp_init(target);
  59         return ERROR_TARGET_INIT_FAILED;
  60 }
  61
  62 static int rtos_target_for_threadid(struct connection *connection, int64_t threadid, struct target **t)
  63 {
  64         struct target *curr = get_target_from_connection(connection);
  65         if (t)
  66                 *t = curr;
  67
  68         return ERROR_OK;
  69 }
  70
  71 static int os_alloc(struct target *target, struct rtos_type *ostype)
  72 {
  73         struct rtos *os = target->rtos = calloc(1, sizeof(struct rtos));
  74
  75         if (!os)
  76                 return JIM_ERR;
  77
  78         os->type = ostype;
  79         os->current_threadid = -1;
  80         os->current_thread = 0;
  81         os->symbols = NULL;
  82         os->target = target;
  83
  84         /* RTOS drivers can override the packet handler in _create(). */
  85         os->gdb_thread_packet = rtos_thread_packet;
  86         os->gdb_target_for_threadid = rtos_target_for_threadid;
  87
  88         return JIM_OK;
  89 }
  90
  91 static void os_free(struct target *target)
  92 {
  93         if (!target->rtos)
  94                 return;
  95
  96         free(target->rtos->symbols);
  97         free(target->rtos);
  98         target->rtos = NULL;
  99 }
 100
 101 static int os_alloc_create(struct target *target, struct rtos_type *ostype)
 102 {
 103         int ret = os_alloc(target, ostype);
 104
 105         if (ret == JIM_OK) {
 106                 ret = target->rtos->type->create(target);
 107                 if (ret != JIM_OK)
 108                         os_free(target);
 109         }
 110
 111         return ret;
 112 }
 113
 114 int rtos_create(struct jim_getopt_info *goi, struct target *target)
 115 {
 116         int x;
 117         const char *cp;
 118         Jim_Obj *res;
 119         int e;
 120
 121         if (!goi->isconfigure && goi->argc != 0) {
 122                 Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "NO PARAMS");
 123                 return JIM_ERR;
 124         }
 125
 126         os_free(target);
 127
 128         e = jim_getopt_string(goi, &cp, NULL);
 129         if (e != JIM_OK)
 130                 return e;
 131
 132         if (strcmp(cp, "none") == 0)
 133                 return JIM_OK;
 134
 135         if (strcmp(cp, "auto") == 0) {
 136                 /* Auto detect tries to look up all symbols for each RTOS,
 137                  * and runs the RTOS driver's _detect() function when GDB
 138                  * finds all symbols for any RTOS. See rtos_qsymbol(). */
 139                 target->rtos_auto_detect = true;
 140
 141                 /* rtos_qsymbol() will iterate over all RTOSes. Allocate
 142                  * target->rtos here, and set it to the first RTOS type. */
 143                 return os_alloc(target, rtos_types[0]);
 144         }
 145
 146         for (x = 0; rtos_types[x]; x++)
 147                 if (strcmp(cp, rtos_types[x]->name) == 0)
 148                         return os_alloc_create(target, rtos_types[x]);
 149
 150         Jim_SetResultFormatted(goi->interp, "Unknown RTOS type %s, try one of: ", cp);
 151         res = Jim_GetResult(goi->interp);
 152         for (x = 0; rtos_types[x]; x++)
 153                 Jim_AppendStrings(goi->interp, res, rtos_types[x]->name, ", ", NULL);
 154         Jim_AppendStrings(goi->interp, res, ", auto or none", NULL);
 155
 156         return JIM_ERR;
 157 }
 158
 159 void rtos_destroy(struct target *target)
 160 {
 161         os_free(target);
 162 }
 163
 164 int gdb_thread_packet(struct connection *connection, char const *packet, int packet_size)
 165 {
 166         struct target *target = get_target_from_connection(connection);
 167         if (!target->rtos)
 168                 return rtos_thread_packet(connection, packet, packet_size);     /* thread not
 169                                                                                  *found*/
 170         return target->rtos->gdb_thread_packet(connection, packet, packet_size);
 171 }
 172
 173 static struct symbol_table_elem *find_symbol(const struct rtos *os, const char *symbol)
 174 {
 175         struct symbol_table_elem *s;
 176
 177         for (s = os->symbols; s->symbol_name; s++)
 178                 if (!strcmp(s->symbol_name, symbol))
 179                         return s;
 180
 181         return NULL;
 182 }
 183
 184 static struct symbol_table_elem *next_symbol(struct rtos *os, char *cur_symbol, uint64_t cur_addr)
 185 {
 186         if (!os->symbols)
 187                 os->type->get_symbol_list_to_lookup(&os->symbols);
 188
 189         if (!cur_symbol[0])
 190                 return &os->symbols[0];
 191
 192         struct symbol_table_elem *s = find_symbol(os, cur_symbol);
 193         if (!s)
 194                 return NULL;
 195
 196         s->address = cur_addr;
 197         s++;
 198         return s;
 199 }
 200
 201 /* searches for 'symbol' in the lookup table for 'os' and returns TRUE,
 202  * if 'symbol' is not declared optional */
 203 static bool is_symbol_mandatory(const struct rtos *os, const char *symbol)
 204 {
 205         struct symbol_table_elem *s = find_symbol(os, symbol);
 206         return s && !s->optional;
 207 }
 208
 209 /* rtos_qsymbol() processes and replies to all qSymbol packets from GDB.
 210  *
 211  * GDB sends a qSymbol:: packet (empty address, empty name) to notify
 212  * that it can now answer qSymbol::hexcodedname queries, to look up symbols.
 213  *
 214  * If the qSymbol packet has no address that means GDB did not find the
 215  * symbol, in which case auto-detect will move on to try the next RTOS.
 216  *
 217  * rtos_qsymbol() then calls the next_symbol() helper function, which
 218  * iterates over symbol names for the current RTOS until it finds the
 219  * symbol in the received GDB packet, and then returns the next entry
 220  * in the list of symbols.
 221  *
 222  * If GDB replied about the last symbol for the RTOS and the RTOS was
 223  * specified explicitly, then no further symbol lookup is done. When
 224  * auto-detecting, the RTOS driver _detect() function must return success.
 225  *
 226  * rtos_qsymbol() returns 1 if an RTOS has been detected, or 0 otherwise.
 227  */
 228 int rtos_qsymbol(struct connection *connection, char const *packet, int packet_size)
 229 {
 230         int rtos_detected = 0;
 231         uint64_t addr = 0;
 232         size_t reply_len;
 233         char reply[GDB_BUFFER_SIZE + 1], cur_sym[GDB_BUFFER_SIZE / 2 + 1] = ""; /* Extra byte for null-termination */
 234         struct symbol_table_elem *next_sym;
 235         struct target *target = get_target_from_connection(connection);
 236         struct rtos *os = target->rtos;
 237
 238         reply_len = sprintf(reply, "OK");
 239
 240         if (!os)
 241                 goto done;
 242
 243         /* Decode any symbol name in the packet*/
 244         size_t len = unhexify((uint8_t *)cur_sym, strchr(packet + 8, ':') + 1, strlen(strchr(packet + 8, ':') + 1));
 245         cur_sym[len] = 0;
 246
 247         if ((strcmp(packet, "qSymbol::") != 0) &&               /* GDB is not offering symbol lookup for the first time */
 248             (!sscanf(packet, "qSymbol:%" SCNx64 ":", &addr)) && /* GDB did not find an address for a symbol */
 249             is_symbol_mandatory(os, cur_sym)) {                                 /* the symbol is mandatory for this RTOS */
 250
 251                 /* GDB could not find an address for the previous symbol */
 252                 if (!target->rtos_auto_detect) {
 253                         LOG_WARNING("RTOS %s not detected. (GDB could not find symbol \'%s\')", os->type->name, cur_sym);
 254                         goto done;
 255                 } else {
 256                         /* Autodetecting RTOS - try next RTOS */
 257                         if (!rtos_try_next(target)) {
 258                                 LOG_WARNING("No RTOS could be auto-detected!");
 259                                 goto done;
 260                         }
 261
 262                         /* Next RTOS selected - invalidate current symbol */
 263                         cur_sym[0] = '\x00';
 264                 }
 265         }
 266
 267         LOG_DEBUG("RTOS: Address of symbol '%s' is 0x%" PRIx64, cur_sym, addr);
 268
 269         next_sym = next_symbol(os, cur_sym, addr);
 270
 271         /* Should never happen unless the debugger misbehaves */
 272         if (!next_sym) {
 273                 LOG_WARNING("RTOS: Debugger sent us qSymbol with '%s' that we did not ask for", cur_sym);
 274                 goto done;
 275         }
 276
 277         if (!next_sym->symbol_name) {
 278                 /* No more symbols need looking up */
 279
 280                 if (!target->rtos_auto_detect) {
 281                         rtos_detected = 1;
 282                         goto done;
 283                 }
 284
 285                 if (os->type->detect_rtos(target)) {
 286                         LOG_INFO("Auto-detected RTOS: %s", os->type->name);
 287                         rtos_detected = 1;
 288                         goto done;
 289                 } else {
 290                         LOG_WARNING("No RTOS could be auto-detected!");
 291                         goto done;
 292                 }
 293         }
 294
 295         if (8 + (strlen(next_sym->symbol_name) * 2) + 1 > sizeof(reply)) {
 296                 LOG_ERROR("ERROR: RTOS symbol '%s' name is too long for GDB!", next_sym->symbol_name);
 297                 goto done;
 298         }
 299
 300         LOG_DEBUG("RTOS: Requesting symbol lookup of '%s' from the debugger", next_sym->symbol_name);
 301
 302         reply_len = snprintf(reply, sizeof(reply), "qSymbol:");
 303         reply_len += hexify(reply + reply_len,
 304                 (const uint8_t *)next_sym->symbol_name, strlen(next_sym->symbol_name),
 305                 sizeof(reply) - reply_len);
 306
 307 done:
 308         gdb_put_packet(connection, reply, reply_len);
 309         return rtos_detected;
 310 }
 311
 312 int rtos_thread_packet(struct connection *connection, char const *packet, int packet_size)
 313 {
 314         struct target *target = get_target_from_connection(connection);
 315
 316         if (strncmp(packet, "qThreadExtraInfo,", 17) == 0) {
 317                 if ((target->rtos) && (target->rtos->thread_details) &&
 318                                 (target->rtos->thread_count != 0)) {
 319                         threadid_t threadid = 0;
 320                         int found = -1;
 321                         sscanf(packet, "qThreadExtraInfo,%" SCNx64, &threadid);
 322
 323                         if ((target->rtos) && (target->rtos->thread_details)) {
 324                                 int thread_num;
 325                                 for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
 326                                         if (target->rtos->thread_details[thread_num].threadid == threadid) {
 327                                                 if (target->rtos->thread_details[thread_num].exists)
 328                                                         found = thread_num;
 329                                         }
 330                                 }
 331                         }
 332                         if (found == -1) {
 333                                 gdb_put_packet(connection, "E01", 3);   /* thread not found */
 334                                 return ERROR_OK;
 335                         }
 336
 337                         struct thread_detail *detail = &target->rtos->thread_details[found];
 338
 339                         int str_size = 0;
 340                         if (detail->thread_name_str)
 341                                 str_size += strlen(detail->thread_name_str);
 342                         if (detail->extra_info_str)
 343                                 str_size += strlen(detail->extra_info_str);
 344
 345                         char *tmp_str = calloc(str_size + 9, sizeof(char));
 346                         char *tmp_str_ptr = tmp_str;
 347
 348                         if (detail->thread_name_str)
 349                                 tmp_str_ptr += sprintf(tmp_str_ptr, "Name: %s", detail->thread_name_str);
 350                         if (detail->extra_info_str) {
 351                                 if (tmp_str_ptr != tmp_str)
 352                                         tmp_str_ptr += sprintf(tmp_str_ptr, ", ");
 353                                 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", detail->extra_info_str);
 354                         }
 355
 356                         assert(strlen(tmp_str) ==
 357                                 (size_t) (tmp_str_ptr - tmp_str));
 358
 359                         char *hex_str = malloc(strlen(tmp_str) * 2 + 1);
 360                         size_t pkt_len = hexify(hex_str, (const uint8_t *)tmp_str,
 361                                 strlen(tmp_str), strlen(tmp_str) * 2 + 1);
 362
 363                         gdb_put_packet(connection, hex_str, pkt_len);
 364                         free(hex_str);
 365                         free(tmp_str);
 366                         return ERROR_OK;
 367
 368                 }
 369                 gdb_put_packet(connection, "", 0);
 370                 return ERROR_OK;
 371         } else if (strncmp(packet, "qSymbol", 7) == 0) {
 372                 if (rtos_qsymbol(connection, packet, packet_size) == 1) {
 373                         if (target->rtos_auto_detect == true) {
 374                                 target->rtos_auto_detect = false;
 375                                 target->rtos->type->create(target);
 376                         }
 377                         target->rtos->type->update_threads(target->rtos);
 378                 }
 379                 return ERROR_OK;
 380         } else if (strncmp(packet, "qfThreadInfo", 12) == 0) {
 381                 int i;
 382                 if (target->rtos) {
 383                         if (target->rtos->thread_count == 0) {
 384                                 gdb_put_packet(connection, "l", 1);
 385                         } else {
 386                                 /*thread id are 16 char +1 for ',' */
 387                                 char *out_str = malloc(17 * target->rtos->thread_count + 1);
 388                                 char *tmp_str = out_str;
 389                                 for (i = 0; i < target->rtos->thread_count; i++) {
 390                                         tmp_str += sprintf(tmp_str, "%c%016" PRIx64, i == 0 ? 'm' : ',',
 391                                                                                 target->rtos->thread_details[i].threadid);
 392                                 }
 393                                 gdb_put_packet(connection, out_str, strlen(out_str));
 394                                 free(out_str);
 395                         }
 396                 } else
 397                         gdb_put_packet(connection, "l", 1);
 398
 399                 return ERROR_OK;
 400         } else if (strncmp(packet, "qsThreadInfo", 12) == 0) {
 401                 gdb_put_packet(connection, "l", 1);
 402                 return ERROR_OK;
 403         } else if (strncmp(packet, "qAttached", 9) == 0) {
 404                 gdb_put_packet(connection, "1", 1);
 405                 return ERROR_OK;
 406         } else if (strncmp(packet, "qOffsets", 8) == 0) {
 407                 char offsets[] = "Text=0;Data=0;Bss=0";
 408                 gdb_put_packet(connection, offsets, sizeof(offsets)-1);
 409                 return ERROR_OK;
 410         } else if (strncmp(packet, "qCRC:", 5) == 0) {
 411                 /* make sure we check this before "qC" packet below
 412                  * otherwise it gets incorrectly handled */
 413                 return GDB_THREAD_PACKET_NOT_CONSUMED;
 414         } else if (strncmp(packet, "qC", 2) == 0) {
 415                 if (target->rtos) {
 416                         char buffer[19];
 417                         int size;
 418                         size = snprintf(buffer, 19, "QC%016" PRIx64, target->rtos->current_thread);
 419                         gdb_put_packet(connection, buffer, size);
 420                 } else
 421                         gdb_put_packet(connection, "QC0", 3);
 422                 return ERROR_OK;
 423         } else if (packet[0] == 'T') {  /* Is thread alive? */
 424                 threadid_t threadid;
 425                 int found = -1;
 426                 sscanf(packet, "T%" SCNx64, &threadid);
 427                 if ((target->rtos) && (target->rtos->thread_details)) {
 428                         int thread_num;
 429                         for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
 430                                 if (target->rtos->thread_details[thread_num].threadid == threadid) {
 431                                         if (target->rtos->thread_details[thread_num].exists)
 432                                                 found = thread_num;
 433                                 }
 434                         }
 435                 }
 436                 if (found != -1)
 437                         gdb_put_packet(connection, "OK", 2);    /* thread alive */
 438                 else
 439                         gdb_put_packet(connection, "E01", 3);   /* thread not found */
 440                 return ERROR_OK;
 441         } else if (packet[0] == 'H') {  /* Set current thread ( 'c' for step and continue, 'g' for
 442                                          * all other operations ) */
 443                 if ((packet[1] == 'g') && (target->rtos)) {
 444                         threadid_t threadid;
 445                         sscanf(packet, "Hg%16" SCNx64, &threadid);
 446                         LOG_DEBUG("RTOS: GDB requested to set current thread to 0x%" PRIx64, threadid);
 447                         /* threadid of 0 indicates target should choose */
 448                         if (threadid == 0)
 449                                 target->rtos->current_threadid = target->rtos->current_thread;
 450                         else
 451                                 target->rtos->current_threadid = threadid;
 452                 }
 453                 gdb_put_packet(connection, "OK", 2);
 454                 return ERROR_OK;
 455         }
 456
 457         return GDB_THREAD_PACKET_NOT_CONSUMED;
 458 }
 459
 460 static int rtos_put_gdb_reg_list(struct connection *connection,
 461                 struct rtos_reg *reg_list, int num_regs)
 462 {
 463         size_t num_bytes = 1; /* NUL */
 464         for (int i = 0; i < num_regs; ++i)
 465                 num_bytes += DIV_ROUND_UP(reg_list[i].size, 8) * 2;
 466
 467         char *hex = malloc(num_bytes);
 468         char *hex_p = hex;
 469
 470         for (int i = 0; i < num_regs; ++i) {
 471                 size_t count = DIV_ROUND_UP(reg_list[i].size, 8);
 472                 size_t n = hexify(hex_p, reg_list[i].value, count, num_bytes);
 473                 hex_p += n;
 474                 num_bytes -= n;
 475         }
 476
 477         gdb_put_packet(connection, hex, strlen(hex));
 478         free(hex);
 479
 480         return ERROR_OK;
 481 }
 482
 483 /** Look through all registers to find this register. */
 484 int rtos_get_gdb_reg(struct connection *connection, int reg_num)
 485 {
 486         struct target *target = get_target_from_connection(connection);
 487         int64_t current_threadid = target->rtos->current_threadid;
 488         if ((target->rtos) && (current_threadid != -1) &&
 489                         (current_threadid != 0) &&
 490                         ((current_threadid != target->rtos->current_thread) ||
 491                         (target->smp))) {       /* in smp several current thread are possible */
 492                 struct rtos_reg *reg_list;
 493                 int num_regs;
 494
 495                 LOG_DEBUG("getting register %d for thread 0x%" PRIx64
 496                                   ", target->rtos->current_thread=0x%" PRIx64,
 497                                                                                 reg_num,
 498                                                                                 current_threadid,
 499                                                                                 target->rtos->current_thread);
 500
 501                 int retval;
 502                 if (target->rtos->type->get_thread_reg) {
 503                         reg_list = calloc(1, sizeof(*reg_list));
 504                         num_regs = 1;
 505                         retval = target->rtos->type->get_thread_reg(target->rtos,
 506                                         current_threadid, reg_num, &reg_list[0]);
 507                         if (retval != ERROR_OK) {
 508                                 LOG_ERROR("RTOS: failed to get register %d", reg_num);
 509                                 return retval;
 510                         }
 511                 } else {
 512                         retval = target->rtos->type->get_thread_reg_list(target->rtos,
 513                                         current_threadid,
 514                                         &reg_list,
 515                                         &num_regs);
 516                         if (retval != ERROR_OK) {
 517                                 LOG_ERROR("RTOS: failed to get register list");
 518                                 return retval;
 519                         }
 520                 }
 521
 522                 for (int i = 0; i < num_regs; ++i) {
 523                         if (reg_list[i].number == (uint32_t)reg_num) {
 524                                 rtos_put_gdb_reg_list(connection, reg_list + i, 1);
 525                                 free(reg_list);
 526                                 return ERROR_OK;
 527                         }
 528                 }
 529
 530                 free(reg_list);
 531         }
 532         return ERROR_FAIL;
 533 }
 534
 535 /** Return a list of general registers. */
 536 int rtos_get_gdb_reg_list(struct connection *connection)
 537 {
 538         struct target *target = get_target_from_connection(connection);
 539         int64_t current_threadid = target->rtos->current_threadid;
 540         if ((target->rtos) && (current_threadid != -1) &&
 541                         (current_threadid != 0) &&
 542                         ((current_threadid != target->rtos->current_thread) ||
 543                         (target->smp))) {       /* in smp several current thread are possible */
 544                 struct rtos_reg *reg_list;
 545                 int num_regs;
 546
 547                 LOG_DEBUG("RTOS: getting register list for thread 0x%" PRIx64
 548                                   ", target->rtos->current_thread=0x%" PRIx64 "\r\n",
 549                                                                                 current_threadid,
 550                                                                                 target->rtos->current_thread);
 551
 552                 int retval = target->rtos->type->get_thread_reg_list(target->rtos,
 553                                 current_threadid,
 554                                 &reg_list,
 555                                 &num_regs);
 556                 if (retval != ERROR_OK) {
 557                         LOG_ERROR("RTOS: failed to get register list");
 558                         return retval;
 559                 }
 560
 561                 rtos_put_gdb_reg_list(connection, reg_list, num_regs);
 562                 free(reg_list);
 563
 564                 return ERROR_OK;
 565         }
 566         return ERROR_FAIL;
 567 }
 568
 569 int rtos_set_reg(struct connection *connection, int reg_num,
 570                 uint8_t *reg_value)
 571 {
 572         struct target *target = get_target_from_connection(connection);
 573         int64_t current_threadid = target->rtos->current_threadid;
 574         if ((target->rtos) &&
 575                         (target->rtos->type->set_reg) &&
 576                         (current_threadid != -1) &&
 577                         (current_threadid != 0)) {
 578                 return target->rtos->type->set_reg(target->rtos, reg_num, reg_value);
 579         }
 580         return ERROR_FAIL;
 581 }
 582
 583 int rtos_generic_stack_read(struct target *target,
 584         const struct rtos_register_stacking *stacking,
 585         int64_t stack_ptr,
 586         struct rtos_reg **reg_list,
 587         int *num_regs)
 588 {
 589         int retval;
 590
 591         if (stack_ptr == 0) {
 592                 LOG_ERROR("Error: null stack pointer in thread");
 593                 return -5;
 594         }
 595         /* Read the stack */
 596         uint8_t *stack_data = malloc(stacking->stack_registers_size);
 597         uint32_t address = stack_ptr;
 598
 599         if (stacking->stack_growth_direction == 1)
 600                 address -= stacking->stack_registers_size;
 601         retval = target_read_buffer(target, address, stacking->stack_registers_size, stack_data);
 602         if (retval != ERROR_OK) {
 603                 free(stack_data);
 604                 LOG_ERROR("Error reading stack frame from thread");
 605                 return retval;
 606         }
 607         LOG_DEBUG("RTOS: Read stack frame at 0x%" PRIx32, address);
 608
 609 #if 0
 610                 LOG_OUTPUT("Stack Data :");
 611                 for (i = 0; i < stacking->stack_registers_size; i++)
 612                         LOG_OUTPUT("%02X", stack_data[i]);
 613                 LOG_OUTPUT("\r\n");
 614 #endif
 615
 616         target_addr_t new_stack_ptr;
 617         if (stacking->calculate_process_stack) {
 618                 new_stack_ptr = stacking->calculate_process_stack(target,
 619                                 stack_data, stacking, stack_ptr);
 620         } else {
 621                 new_stack_ptr = stack_ptr - stacking->stack_growth_direction *
 622                         stacking->stack_registers_size;
 623         }
 624
 625         *reg_list = calloc(stacking->num_output_registers, sizeof(struct rtos_reg));
 626         *num_regs = stacking->num_output_registers;
 627
 628         for (int i = 0; i < stacking->num_output_registers; ++i) {
 629                 (*reg_list)[i].number = stacking->register_offsets[i].number;
 630                 (*reg_list)[i].size = stacking->register_offsets[i].width_bits;
 631
 632                 int offset = stacking->register_offsets[i].offset;
 633                 if (offset == -2)
 634                         buf_cpy(&new_stack_ptr, (*reg_list)[i].value, (*reg_list)[i].size);
 635                 else if (offset != -1)
 636                         buf_cpy(stack_data + offset, (*reg_list)[i].value, (*reg_list)[i].size);
 637         }
 638
 639         free(stack_data);
 640 /*      LOG_OUTPUT("Output register string: %s\r\n", *hex_reg_list); */
 641         return ERROR_OK;
 642 }
 643
 644 static int rtos_try_next(struct target *target)
 645 {
 646         struct rtos *os = target->rtos;
 647         struct rtos_type **type = rtos_types;
 648
 649         if (!os)
 650                 return 0;
 651
 652         while (*type && os->type != *type)
 653                 type++;
 654
 655         if (!*type || !*(++type))
 656                 return 0;
 657
 658         os->type = *type;
 659
 660         free(os->symbols);
 661         os->symbols = NULL;
 662
 663         return 1;
 664 }
 665
 666 int rtos_update_threads(struct target *target)
 667 {
 668         if ((target->rtos) && (target->rtos->type))
 669                 target->rtos->type->update_threads(target->rtos);
 670         return ERROR_OK;
 671 }
 672
 673 void rtos_free_threadlist(struct rtos *rtos)
 674 {
 675         if (rtos->thread_details) {
 676                 int j;
 677
 678                 for (j = 0; j < rtos->thread_count; j++) {
 679                         struct thread_detail *current_thread = &rtos->thread_details[j];
 680                         free(current_thread->thread_name_str);
 681                         free(current_thread->extra_info_str);
 682                 }
 683                 free(rtos->thread_details);
 684                 rtos->thread_details = NULL;
 685                 rtos->thread_count = 0;
 686                 rtos->current_threadid = -1;
 687                 rtos->current_thread = 0;
 688         }
 689 }
 690
 691 int rtos_read_buffer(struct target *target, target_addr_t address,
 692                 uint32_t size, uint8_t *buffer)
 693 {
 694         if (target->rtos->type->read_buffer)
 695                 return target->rtos->type->read_buffer(target->rtos, address, size, buffer);
 696         return ERROR_NOT_IMPLEMENTED;
 697 }
 698
 699 int rtos_write_buffer(struct target *target, target_addr_t address,
 700                 uint32_t size, const uint8_t *buffer)
 701 {
 702         if (target->rtos->type->write_buffer)
 703                 return target->rtos->type->write_buffer(target->rtos, address, size, buffer);
 704         return ERROR_NOT_IMPLEMENTED;
 705 }