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 *next_symbol(struct rtos *os, char *cur_symbol, uint64_t cur_addr)
 174 {
 175         struct symbol_table_elem *s;
 176
 177         if (!os->symbols)
 178                 os->type->get_symbol_list_to_lookup(&os->symbols);
 179
 180         if (!cur_symbol[0])
 181                 return &os->symbols[0];
 182
 183         for (s = os->symbols; s->symbol_name; s++)
 184                 if (!strcmp(s->symbol_name, cur_symbol)) {
 185                         s->address = cur_addr;
 186                         s++;
 187                         return s;
 188                 }
 189
 190         return NULL;
 191 }
 192
 193 /* searches for 'symbol' in the lookup table for 'os' and returns TRUE,
 194  * if 'symbol' is not declared optional */
 195 static bool is_symbol_mandatory(const struct rtos *os, const char *symbol)
 196 {
 197         for (struct symbol_table_elem *s = os->symbols; s->symbol_name; ++s) {
 198                 if (!strcmp(s->symbol_name, symbol))
 199                         return !s->optional;
 200         }
 201         return false;
 202 }
 203
 204 /* rtos_qsymbol() processes and replies to all qSymbol packets from GDB.
 205  *
 206  * GDB sends a qSymbol:: packet (empty address, empty name) to notify
 207  * that it can now answer qSymbol::hexcodedname queries, to look up symbols.
 208  *
 209  * If the qSymbol packet has no address that means GDB did not find the
 210  * symbol, in which case auto-detect will move on to try the next RTOS.
 211  *
 212  * rtos_qsymbol() then calls the next_symbol() helper function, which
 213  * iterates over symbol names for the current RTOS until it finds the
 214  * symbol in the received GDB packet, and then returns the next entry
 215  * in the list of symbols.
 216  *
 217  * If GDB replied about the last symbol for the RTOS and the RTOS was
 218  * specified explicitly, then no further symbol lookup is done. When
 219  * auto-detecting, the RTOS driver _detect() function must return success.
 220  *
 221  * rtos_qsymbol() returns 1 if an RTOS has been detected, or 0 otherwise.
 222  */
 223 int rtos_qsymbol(struct connection *connection, char const *packet, int packet_size)
 224 {
 225         int rtos_detected = 0;
 226         uint64_t addr = 0;
 227         size_t reply_len;
 228         char reply[GDB_BUFFER_SIZE + 1], cur_sym[GDB_BUFFER_SIZE / 2 + 1] = ""; /* Extra byte for null-termination */
 229         struct symbol_table_elem *next_sym;
 230         struct target *target = get_target_from_connection(connection);
 231         struct rtos *os = target->rtos;
 232
 233         reply_len = sprintf(reply, "OK");
 234
 235         if (!os)
 236                 goto done;
 237
 238         /* Decode any symbol name in the packet*/
 239         size_t len = unhexify((uint8_t *)cur_sym, strchr(packet + 8, ':') + 1, strlen(strchr(packet + 8, ':') + 1));
 240         cur_sym[len] = 0;
 241
 242         if ((strcmp(packet, "qSymbol::") != 0) &&               /* GDB is not offering symbol lookup for the first time */
 243             (!sscanf(packet, "qSymbol:%" SCNx64 ":", &addr)) && /* GDB did not find an address for a symbol */
 244             is_symbol_mandatory(os, cur_sym)) {                                 /* the symbol is mandatory for this RTOS */
 245
 246                 /* GDB could not find an address for the previous symbol */
 247                 if (!target->rtos_auto_detect) {
 248                         LOG_WARNING("RTOS %s not detected. (GDB could not find symbol \'%s\')", os->type->name, cur_sym);
 249                         goto done;
 250                 } else {
 251                         /* Autodetecting RTOS - try next RTOS */
 252                         if (!rtos_try_next(target)) {
 253                                 LOG_WARNING("No RTOS could be auto-detected!");
 254                                 goto done;
 255                         }
 256
 257                         /* Next RTOS selected - invalidate current symbol */
 258                         cur_sym[0] = '\x00';
 259                 }
 260         }
 261
 262         LOG_DEBUG("RTOS: Address of symbol '%s' is 0x%" PRIx64, cur_sym, addr);
 263
 264         next_sym = next_symbol(os, cur_sym, addr);
 265
 266         /* Should never happen unless the debugger misbehaves */
 267         if (!next_sym) {
 268                 LOG_WARNING("RTOS: Debugger sent us qSymbol with '%s' that we did not ask for", cur_sym);
 269                 goto done;
 270         }
 271
 272         if (!next_sym->symbol_name) {
 273                 /* No more symbols need looking up */
 274
 275                 if (!target->rtos_auto_detect) {
 276                         rtos_detected = 1;
 277                         goto done;
 278                 }
 279
 280                 if (os->type->detect_rtos(target)) {
 281                         LOG_INFO("Auto-detected RTOS: %s", os->type->name);
 282                         rtos_detected = 1;
 283                         goto done;
 284                 } else {
 285                         LOG_WARNING("No RTOS could be auto-detected!");
 286                         goto done;
 287                 }
 288         }
 289
 290         if (8 + (strlen(next_sym->symbol_name) * 2) + 1 > sizeof(reply)) {
 291                 LOG_ERROR("ERROR: RTOS symbol '%s' name is too long for GDB!", next_sym->symbol_name);
 292                 goto done;
 293         }
 294
 295         LOG_DEBUG("RTOS: Requesting symbol lookup of '%s' from the debugger", next_sym->symbol_name);
 296
 297         reply_len = snprintf(reply, sizeof(reply), "qSymbol:");
 298         reply_len += hexify(reply + reply_len,
 299                 (const uint8_t *)next_sym->symbol_name, strlen(next_sym->symbol_name),
 300                 sizeof(reply) - reply_len);
 301
 302 done:
 303         gdb_put_packet(connection, reply, reply_len);
 304         return rtos_detected;
 305 }
 306
 307 int rtos_thread_packet(struct connection *connection, char const *packet, int packet_size)
 308 {
 309         struct target *target = get_target_from_connection(connection);
 310
 311         if (strncmp(packet, "qThreadExtraInfo,", 17) == 0) {
 312                 if ((target->rtos) && (target->rtos->thread_details) &&
 313                                 (target->rtos->thread_count != 0)) {
 314                         threadid_t threadid = 0;
 315                         int found = -1;
 316                         sscanf(packet, "qThreadExtraInfo,%" SCNx64, &threadid);
 317
 318                         if ((target->rtos) && (target->rtos->thread_details)) {
 319                                 int thread_num;
 320                                 for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
 321                                         if (target->rtos->thread_details[thread_num].threadid == threadid) {
 322                                                 if (target->rtos->thread_details[thread_num].exists)
 323                                                         found = thread_num;
 324                                         }
 325                                 }
 326                         }
 327                         if (found == -1) {
 328                                 gdb_put_packet(connection, "E01", 3);   /* thread not found */
 329                                 return ERROR_OK;
 330                         }
 331
 332                         struct thread_detail *detail = &target->rtos->thread_details[found];
 333
 334                         int str_size = 0;
 335                         if (detail->thread_name_str)
 336                                 str_size += strlen(detail->thread_name_str);
 337                         if (detail->extra_info_str)
 338                                 str_size += strlen(detail->extra_info_str);
 339
 340                         char *tmp_str = calloc(str_size + 9, sizeof(char));
 341                         char *tmp_str_ptr = tmp_str;
 342
 343                         if (detail->thread_name_str)
 344                                 tmp_str_ptr += sprintf(tmp_str_ptr, "Name: %s", detail->thread_name_str);
 345                         if (detail->extra_info_str) {
 346                                 if (tmp_str_ptr != tmp_str)
 347                                         tmp_str_ptr += sprintf(tmp_str_ptr, ", ");
 348                                 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", detail->extra_info_str);
 349                         }
 350
 351                         assert(strlen(tmp_str) ==
 352                                 (size_t) (tmp_str_ptr - tmp_str));
 353
 354                         char *hex_str = malloc(strlen(tmp_str) * 2 + 1);
 355                         size_t pkt_len = hexify(hex_str, (const uint8_t *)tmp_str,
 356                                 strlen(tmp_str), strlen(tmp_str) * 2 + 1);
 357
 358                         gdb_put_packet(connection, hex_str, pkt_len);
 359                         free(hex_str);
 360                         free(tmp_str);
 361                         return ERROR_OK;
 362
 363                 }
 364                 gdb_put_packet(connection, "", 0);
 365                 return ERROR_OK;
 366         } else if (strncmp(packet, "qSymbol", 7) == 0) {
 367                 if (rtos_qsymbol(connection, packet, packet_size) == 1) {
 368                         if (target->rtos_auto_detect == true) {
 369                                 target->rtos_auto_detect = false;
 370                                 target->rtos->type->create(target);
 371                         }
 372                         target->rtos->type->update_threads(target->rtos);
 373                 }
 374                 return ERROR_OK;
 375         } else if (strncmp(packet, "qfThreadInfo", 12) == 0) {
 376                 int i;
 377                 if (target->rtos) {
 378                         if (target->rtos->thread_count == 0) {
 379                                 gdb_put_packet(connection, "l", 1);
 380                         } else {
 381                                 /*thread id are 16 char +1 for ',' */
 382                                 char *out_str = malloc(17 * target->rtos->thread_count + 1);
 383                                 char *tmp_str = out_str;
 384                                 for (i = 0; i < target->rtos->thread_count; i++) {
 385                                         tmp_str += sprintf(tmp_str, "%c%016" PRIx64, i == 0 ? 'm' : ',',
 386                                                                                 target->rtos->thread_details[i].threadid);
 387                                 }
 388                                 gdb_put_packet(connection, out_str, strlen(out_str));
 389                                 free(out_str);
 390                         }
 391                 } else
 392                         gdb_put_packet(connection, "l", 1);
 393
 394                 return ERROR_OK;
 395         } else if (strncmp(packet, "qsThreadInfo", 12) == 0) {
 396                 gdb_put_packet(connection, "l", 1);
 397                 return ERROR_OK;
 398         } else if (strncmp(packet, "qAttached", 9) == 0) {
 399                 gdb_put_packet(connection, "1", 1);
 400                 return ERROR_OK;
 401         } else if (strncmp(packet, "qOffsets", 8) == 0) {
 402                 char offsets[] = "Text=0;Data=0;Bss=0";
 403                 gdb_put_packet(connection, offsets, sizeof(offsets)-1);
 404                 return ERROR_OK;
 405         } else if (strncmp(packet, "qCRC:", 5) == 0) {
 406                 /* make sure we check this before "qC" packet below
 407                  * otherwise it gets incorrectly handled */
 408                 return GDB_THREAD_PACKET_NOT_CONSUMED;
 409         } else if (strncmp(packet, "qC", 2) == 0) {
 410                 if (target->rtos) {
 411                         char buffer[19];
 412                         int size;
 413                         size = snprintf(buffer, 19, "QC%016" PRIx64, target->rtos->current_thread);
 414                         gdb_put_packet(connection, buffer, size);
 415                 } else
 416                         gdb_put_packet(connection, "QC0", 3);
 417                 return ERROR_OK;
 418         } else if (packet[0] == 'T') {  /* Is thread alive? */
 419                 threadid_t threadid;
 420                 int found = -1;
 421                 sscanf(packet, "T%" SCNx64, &threadid);
 422                 if ((target->rtos) && (target->rtos->thread_details)) {
 423                         int thread_num;
 424                         for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
 425                                 if (target->rtos->thread_details[thread_num].threadid == threadid) {
 426                                         if (target->rtos->thread_details[thread_num].exists)
 427                                                 found = thread_num;
 428                                 }
 429                         }
 430                 }
 431                 if (found != -1)
 432                         gdb_put_packet(connection, "OK", 2);    /* thread alive */
 433                 else
 434                         gdb_put_packet(connection, "E01", 3);   /* thread not found */
 435                 return ERROR_OK;
 436         } else if (packet[0] == 'H') {  /* Set current thread ( 'c' for step and continue, 'g' for
 437                                          * all other operations ) */
 438                 if ((packet[1] == 'g') && (target->rtos)) {
 439                         threadid_t threadid;
 440                         sscanf(packet, "Hg%16" SCNx64, &threadid);
 441                         LOG_DEBUG("RTOS: GDB requested to set current thread to 0x%" PRIx64, threadid);
 442                         /* threadid of 0 indicates target should choose */
 443                         if (threadid == 0)
 444                                 target->rtos->current_threadid = target->rtos->current_thread;
 445                         else
 446                                 target->rtos->current_threadid = threadid;
 447                 }
 448                 gdb_put_packet(connection, "OK", 2);
 449                 return ERROR_OK;
 450         }
 451
 452         return GDB_THREAD_PACKET_NOT_CONSUMED;
 453 }
 454
 455 static int rtos_put_gdb_reg_list(struct connection *connection,
 456                 struct rtos_reg *reg_list, int num_regs)
 457 {
 458         size_t num_bytes = 1; /* NUL */
 459         for (int i = 0; i < num_regs; ++i)
 460                 num_bytes += DIV_ROUND_UP(reg_list[i].size, 8) * 2;
 461
 462         char *hex = malloc(num_bytes);
 463         char *hex_p = hex;
 464
 465         for (int i = 0; i < num_regs; ++i) {
 466                 size_t count = DIV_ROUND_UP(reg_list[i].size, 8);
 467                 size_t n = hexify(hex_p, reg_list[i].value, count, num_bytes);
 468                 hex_p += n;
 469                 num_bytes -= n;
 470         }
 471
 472         gdb_put_packet(connection, hex, strlen(hex));
 473         free(hex);
 474
 475         return ERROR_OK;
 476 }
 477
 478 /** Look through all registers to find this register. */
 479 int rtos_get_gdb_reg(struct connection *connection, int reg_num)
 480 {
 481         struct target *target = get_target_from_connection(connection);
 482         int64_t current_threadid = target->rtos->current_threadid;
 483         if ((target->rtos) && (current_threadid != -1) &&
 484                         (current_threadid != 0) &&
 485                         ((current_threadid != target->rtos->current_thread) ||
 486                         (target->smp))) {       /* in smp several current thread are possible */
 487                 struct rtos_reg *reg_list;
 488                 int num_regs;
 489
 490                 LOG_DEBUG("getting register %d for thread 0x%" PRIx64
 491                                   ", target->rtos->current_thread=0x%" PRIx64,
 492                                                                                 reg_num,
 493                                                                                 current_threadid,
 494                                                                                 target->rtos->current_thread);
 495
 496                 int retval;
 497                 if (target->rtos->type->get_thread_reg) {
 498                         reg_list = calloc(1, sizeof(*reg_list));
 499                         num_regs = 1;
 500                         retval = target->rtos->type->get_thread_reg(target->rtos,
 501                                         current_threadid, reg_num, &reg_list[0]);
 502                         if (retval != ERROR_OK) {
 503                                 LOG_ERROR("RTOS: failed to get register %d", reg_num);
 504                                 return retval;
 505                         }
 506                 } else {
 507                         retval = target->rtos->type->get_thread_reg_list(target->rtos,
 508                                         current_threadid,
 509                                         &reg_list,
 510                                         &num_regs);
 511                         if (retval != ERROR_OK) {
 512                                 LOG_ERROR("RTOS: failed to get register list");
 513                                 return retval;
 514                         }
 515                 }
 516
 517                 for (int i = 0; i < num_regs; ++i) {
 518                         if (reg_list[i].number == (uint32_t)reg_num) {
 519                                 rtos_put_gdb_reg_list(connection, reg_list + i, 1);
 520                                 free(reg_list);
 521                                 return ERROR_OK;
 522                         }
 523                 }
 524
 525                 free(reg_list);
 526         }
 527         return ERROR_FAIL;
 528 }
 529
 530 /** Return a list of general registers. */
 531 int rtos_get_gdb_reg_list(struct connection *connection)
 532 {
 533         struct target *target = get_target_from_connection(connection);
 534         int64_t current_threadid = target->rtos->current_threadid;
 535         if ((target->rtos) && (current_threadid != -1) &&
 536                         (current_threadid != 0) &&
 537                         ((current_threadid != target->rtos->current_thread) ||
 538                         (target->smp))) {       /* in smp several current thread are possible */
 539                 struct rtos_reg *reg_list;
 540                 int num_regs;
 541
 542                 LOG_DEBUG("RTOS: getting register list for thread 0x%" PRIx64
 543                                   ", target->rtos->current_thread=0x%" PRIx64 "\r\n",
 544                                                                                 current_threadid,
 545                                                                                 target->rtos->current_thread);
 546
 547                 int retval = target->rtos->type->get_thread_reg_list(target->rtos,
 548                                 current_threadid,
 549                                 &reg_list,
 550                                 &num_regs);
 551                 if (retval != ERROR_OK) {
 552                         LOG_ERROR("RTOS: failed to get register list");
 553                         return retval;
 554                 }
 555
 556                 rtos_put_gdb_reg_list(connection, reg_list, num_regs);
 557                 free(reg_list);
 558
 559                 return ERROR_OK;
 560         }
 561         return ERROR_FAIL;
 562 }
 563
 564 int rtos_set_reg(struct connection *connection, int reg_num,
 565                 uint8_t *reg_value)
 566 {
 567         struct target *target = get_target_from_connection(connection);
 568         int64_t current_threadid = target->rtos->current_threadid;
 569         if ((target->rtos) &&
 570                         (target->rtos->type->set_reg) &&
 571                         (current_threadid != -1) &&
 572                         (current_threadid != 0)) {
 573                 return target->rtos->type->set_reg(target->rtos, reg_num, reg_value);
 574         }
 575         return ERROR_FAIL;
 576 }
 577
 578 int rtos_generic_stack_read(struct target *target,
 579         const struct rtos_register_stacking *stacking,
 580         int64_t stack_ptr,
 581         struct rtos_reg **reg_list,
 582         int *num_regs)
 583 {
 584         int retval;
 585
 586         if (stack_ptr == 0) {
 587                 LOG_ERROR("Error: null stack pointer in thread");
 588                 return -5;
 589         }
 590         /* Read the stack */
 591         uint8_t *stack_data = malloc(stacking->stack_registers_size);
 592         uint32_t address = stack_ptr;
 593
 594         if (stacking->stack_growth_direction == 1)
 595                 address -= stacking->stack_registers_size;
 596         retval = target_read_buffer(target, address, stacking->stack_registers_size, stack_data);
 597         if (retval != ERROR_OK) {
 598                 free(stack_data);
 599                 LOG_ERROR("Error reading stack frame from thread");
 600                 return retval;
 601         }
 602         LOG_DEBUG("RTOS: Read stack frame at 0x%" PRIx32, address);
 603
 604 #if 0
 605                 LOG_OUTPUT("Stack Data :");
 606                 for (i = 0; i < stacking->stack_registers_size; i++)
 607                         LOG_OUTPUT("%02X", stack_data[i]);
 608                 LOG_OUTPUT("\r\n");
 609 #endif
 610
 611         target_addr_t new_stack_ptr;
 612         if (stacking->calculate_process_stack) {
 613                 new_stack_ptr = stacking->calculate_process_stack(target,
 614                                 stack_data, stacking, stack_ptr);
 615         } else {
 616                 new_stack_ptr = stack_ptr - stacking->stack_growth_direction *
 617                         stacking->stack_registers_size;
 618         }
 619
 620         *reg_list = calloc(stacking->num_output_registers, sizeof(struct rtos_reg));
 621         *num_regs = stacking->num_output_registers;
 622
 623         for (int i = 0; i < stacking->num_output_registers; ++i) {
 624                 (*reg_list)[i].number = stacking->register_offsets[i].number;
 625                 (*reg_list)[i].size = stacking->register_offsets[i].width_bits;
 626
 627                 int offset = stacking->register_offsets[i].offset;
 628                 if (offset == -2)
 629                         buf_cpy(&new_stack_ptr, (*reg_list)[i].value, (*reg_list)[i].size);
 630                 else if (offset != -1)
 631                         buf_cpy(stack_data + offset, (*reg_list)[i].value, (*reg_list)[i].size);
 632         }
 633
 634         free(stack_data);
 635 /*      LOG_OUTPUT("Output register string: %s\r\n", *hex_reg_list); */
 636         return ERROR_OK;
 637 }
 638
 639 static int rtos_try_next(struct target *target)
 640 {
 641         struct rtos *os = target->rtos;
 642         struct rtos_type **type = rtos_types;
 643
 644         if (!os)
 645                 return 0;
 646
 647         while (*type && os->type != *type)
 648                 type++;
 649
 650         if (!*type || !*(++type))
 651                 return 0;
 652
 653         os->type = *type;
 654
 655         free(os->symbols);
 656         os->symbols = NULL;
 657
 658         return 1;
 659 }
 660
 661 int rtos_update_threads(struct target *target)
 662 {
 663         if ((target->rtos) && (target->rtos->type))
 664                 target->rtos->type->update_threads(target->rtos);
 665         return ERROR_OK;
 666 }
 667
 668 void rtos_free_threadlist(struct rtos *rtos)
 669 {
 670         if (rtos->thread_details) {
 671                 int j;
 672
 673                 for (j = 0; j < rtos->thread_count; j++) {
 674                         struct thread_detail *current_thread = &rtos->thread_details[j];
 675                         free(current_thread->thread_name_str);
 676                         free(current_thread->extra_info_str);
 677                 }
 678                 free(rtos->thread_details);
 679                 rtos->thread_details = NULL;
 680                 rtos->thread_count = 0;
 681                 rtos->current_threadid = -1;
 682                 rtos->current_thread = 0;
 683         }
 684 }
 685
 686 int rtos_read_buffer(struct target *target, target_addr_t address,
 687                 uint32_t size, uint8_t *buffer)
 688 {
 689         if (target->rtos->type->read_buffer)
 690                 return target->rtos->type->read_buffer(target->rtos, address, size, buffer);
 691         return ERROR_NOT_IMPLEMENTED;
 692 }
 693
 694 int rtos_write_buffer(struct target *target, target_addr_t address,
 695                 uint32_t size, const uint8_t *buffer)
 696 {
 697         if (target->rtos->type->write_buffer)
 698                 return target->rtos->type->write_buffer(target->rtos, address, size, buffer);
 699         return ERROR_NOT_IMPLEMENTED;
 700 }