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