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   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Broadcom Corporation                            *
   3  *   Evan Hunter - ehunter@broadcom.com                                    *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include <helper/time_support.h>
  26 #include <jtag/jtag.h>
  27 #include "target/target.h"
  28 #include "target/target_type.h"
  29 #include "rtos.h"
  30 #include "helper/log.h"
  31 #include "helper/types.h"
  32 #include "rtos_standard_stackings.h"
  33
  34 static int ThreadX_detect_rtos(struct target *target);
  35 static int ThreadX_create(struct target *target);
  36 static int ThreadX_update_threads(struct rtos *rtos);
  37 static int ThreadX_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char **hex_reg_list);
  38 static int ThreadX_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[]);
  39
  40 struct ThreadX_thread_state {
  41         int value;
  42         char *desc;
  43 };
  44
  45 struct ThreadX_thread_state ThreadX_thread_states[] = {
  46         { 0,  "Ready" },
  47         { 1,  "Completed" },
  48         { 2,  "Terminated" },
  49         { 3,  "Suspended" },
  50         { 4,  "Sleeping" },
  51         { 5,  "Waiting - Queue" },
  52         { 6,  "Waiting - Semaphore" },
  53         { 7,  "Waiting - Event flag" },
  54         { 8,  "Waiting - Memory" },
  55         { 9,  "Waiting - Memory" },
  56         { 10, "Waiting - I/O" },
  57         { 11, "Waiting - Filesystem" },
  58         { 12, "Waiting - Network" },
  59         { 13, "Waiting - Mutex" },
  60 };
  61
  62 #define THREADX_NUM_STATES (sizeof(ThreadX_thread_states)/sizeof(struct ThreadX_thread_state))
  63
  64 struct ThreadX_params {
  65         char *target_name;
  66         unsigned char pointer_width;
  67         unsigned char thread_stack_offset;
  68         unsigned char thread_name_offset;
  69         unsigned char thread_state_offset;
  70         unsigned char thread_next_offset;
  71         const struct rtos_register_stacking *stacking_info;
  72 };
  73
  74 const struct ThreadX_params ThreadX_params_list[] = {
  75         {
  76         "cortex_m3",                            /* target_name */
  77         4,                                                      /* pointer_width; */
  78         8,                                                      /* thread_stack_offset; */
  79         40,                                                     /* thread_name_offset; */
  80         48,                                                     /* thread_state_offset; */
  81         136,                                            /* thread_next_offset */
  82         &rtos_standard_Cortex_M3_stacking,      /* stacking_info */
  83         }
  84 };
  85
  86 #define THREADX_NUM_PARAMS ((int)(sizeof(ThreadX_params_list)/sizeof(struct ThreadX_params)))
  87
  88 enum ThreadX_symbol_values {
  89         ThreadX_VAL_tx_thread_current_ptr = 0,
  90         ThreadX_VAL_tx_thread_created_ptr = 1,
  91         ThreadX_VAL_tx_thread_created_count = 2,
  92 };
  93
  94 static char *ThreadX_symbol_list[] = {
  95         "_tx_thread_current_ptr",
  96         "_tx_thread_created_ptr",
  97         "_tx_thread_created_count",
  98         NULL
  99 };
 100
 101 const struct rtos_type ThreadX_rtos = {
 102         .name = "ThreadX",
 103
 104         .detect_rtos = ThreadX_detect_rtos,
 105         .create = ThreadX_create,
 106         .update_threads = ThreadX_update_threads,
 107         .get_thread_reg_list = ThreadX_get_thread_reg_list,
 108         .get_symbol_list_to_lookup = ThreadX_get_symbol_list_to_lookup,
 109
 110 };
 111
 112 static int ThreadX_update_threads(struct rtos *rtos)
 113 {
 114         int retval;
 115         int tasks_found = 0;
 116         int thread_list_size = 0;
 117         const struct ThreadX_params *param;
 118
 119         if (rtos == NULL)
 120                 return -1;
 121
 122         if (rtos->rtos_specific_params == NULL)
 123                 return -3;
 124
 125         param = (const struct ThreadX_params *) rtos->rtos_specific_params;
 126
 127         if (rtos->symbols == NULL) {
 128                 LOG_OUTPUT("No symbols for ThreadX\r\n");
 129                 return -4;
 130         }
 131
 132         if (rtos->symbols[ThreadX_VAL_tx_thread_created_count].address == 0) {
 133                 LOG_OUTPUT("Don't have the number of threads in ThreadX \r\n");
 134                 return -2;
 135         }
 136
 137         /* read the number of threads */
 138         retval = target_read_buffer(rtos->target,
 139                         rtos->symbols[ThreadX_VAL_tx_thread_created_count].address,
 140                         4,
 141                         (uint8_t *)&thread_list_size);
 142
 143         if (retval != ERROR_OK) {
 144                 LOG_OUTPUT("Could not read ThreadX thread count from target\r\n");
 145                 return retval;
 146         }
 147
 148         /* wipe out previous thread details if any */
 149         if (rtos->thread_details != NULL) {
 150                 int j;
 151                 for (j = 0; j < rtos->thread_count; j++) {
 152                         if (rtos->thread_details[j].display_str != NULL) {
 153                                 free(rtos->thread_details[j].display_str);
 154                                 rtos->thread_details[j].display_str = NULL;
 155                         }
 156                         if (rtos->thread_details[j].thread_name_str != NULL) {
 157                                 free(rtos->thread_details[j].thread_name_str);
 158                                 rtos->thread_details[j].thread_name_str = NULL;
 159                         }
 160                         if (rtos->thread_details[j].extra_info_str != NULL) {
 161                                 free(rtos->thread_details[j].extra_info_str);
 162                                 rtos->thread_details[j].extra_info_str = NULL;
 163                         }
 164                 }
 165                 free(rtos->thread_details);
 166                 rtos->thread_details = NULL;
 167         }
 168
 169         /* read the current thread id */
 170         retval = target_read_buffer(rtos->target,
 171                         rtos->symbols[ThreadX_VAL_tx_thread_current_ptr].address,
 172                         4,
 173                         (uint8_t *)&rtos->current_thread);
 174
 175         if (retval != ERROR_OK) {
 176                 LOG_OUTPUT("Could not read ThreadX current thread from target\r\n");
 177                 return retval;
 178         }
 179
 180         if ((thread_list_size  == 0) || (rtos->current_thread == 0)) {
 181                 /* Either : No RTOS threads - there is always at least the current execution though */
 182                 /* OR     : No current thread - all threads suspended - show the current execution
 183                  * of idling */
 184                 char tmp_str[] = "Current Execution";
 185                 thread_list_size++;
 186                 tasks_found++;
 187                 rtos->thread_details = (struct thread_detail *) malloc(
 188                                 sizeof(struct thread_detail) * thread_list_size);
 189                 rtos->thread_details->threadid = 1;
 190                 rtos->thread_details->exists = true;
 191                 rtos->thread_details->display_str = NULL;
 192                 rtos->thread_details->extra_info_str = NULL;
 193                 rtos->thread_details->thread_name_str = (char *) malloc(sizeof(tmp_str));
 194                 strcpy(rtos->thread_details->thread_name_str, tmp_str);
 195
 196                 if (thread_list_size == 0) {
 197                         rtos->thread_count = 1;
 198                         return ERROR_OK;
 199                 }
 200         } else {
 201                 /* create space for new thread details */
 202                 rtos->thread_details = (struct thread_detail *) malloc(
 203                                 sizeof(struct thread_detail) * thread_list_size);
 204         }
 205
 206         /* Read the pointer to the first thread */
 207         int64_t thread_ptr = 0;
 208         retval = target_read_buffer(rtos->target,
 209                         rtos->symbols[ThreadX_VAL_tx_thread_created_ptr].address,
 210                         param->pointer_width,
 211                         (uint8_t *)&thread_ptr);
 212         if (retval != ERROR_OK) {
 213                 LOG_OUTPUT("Could not read ThreadX thread location from target\r\n");
 214                 return retval;
 215         }
 216
 217         /* loop over all threads */
 218         int64_t prev_thread_ptr = 0;
 219         while ((thread_ptr != prev_thread_ptr) && (tasks_found < thread_list_size)) {
 220
 221                 #define THREADX_THREAD_NAME_STR_SIZE (200)
 222                 char tmp_str[THREADX_THREAD_NAME_STR_SIZE];
 223                 unsigned int i = 0;
 224                 int64_t name_ptr = 0;
 225
 226                 /* Save the thread pointer */
 227                 rtos->thread_details[tasks_found].threadid = thread_ptr;
 228
 229                 /* read the name pointer */
 230                 retval = target_read_buffer(rtos->target,
 231                                 thread_ptr + param->thread_name_offset,
 232                                 param->pointer_width,
 233                                 (uint8_t *)&name_ptr);
 234                 if (retval != ERROR_OK) {
 235                         LOG_OUTPUT("Could not read ThreadX thread name pointer from target\r\n");
 236                         return retval;
 237                 }
 238
 239                 /* Read the thread name */
 240                 retval =
 241                         target_read_buffer(rtos->target,
 242                                 name_ptr,
 243                                 THREADX_THREAD_NAME_STR_SIZE,
 244                                 (uint8_t *)&tmp_str);
 245                 if (retval != ERROR_OK) {
 246                         LOG_OUTPUT("Error reading thread name from ThreadX target\r\n");
 247                         return retval;
 248                 }
 249                 tmp_str[THREADX_THREAD_NAME_STR_SIZE-1] = '\x00';
 250
 251                 if (tmp_str[0] == '\x00')
 252                         strcpy(tmp_str, "No Name");
 253
 254                 rtos->thread_details[tasks_found].thread_name_str =
 255                         (char *)malloc(strlen(tmp_str)+1);
 256                 strcpy(rtos->thread_details[tasks_found].thread_name_str, tmp_str);
 257
 258                 /* Read the thread status */
 259                 int64_t thread_status = 0;
 260                 retval = target_read_buffer(rtos->target,
 261                                 thread_ptr + param->thread_state_offset,
 262                                 4,
 263                                 (uint8_t *)&thread_status);
 264                 if (retval != ERROR_OK) {
 265                         LOG_OUTPUT("Error reading thread state from ThreadX target\r\n");
 266                         return retval;
 267                 }
 268
 269                 for (i = 0; (i < THREADX_NUM_STATES) &&
 270                                 (ThreadX_thread_states[i].value != thread_status); i++) {
 271                         /* empty */
 272                 }
 273
 274                 char *state_desc;
 275                 if  (i < THREADX_NUM_STATES)
 276                         state_desc = ThreadX_thread_states[i].desc;
 277                 else
 278                         state_desc = "Unknown state";
 279
 280                 rtos->thread_details[tasks_found].extra_info_str = (char *)malloc(strlen(
 281                                         state_desc)+1);
 282                 strcpy(rtos->thread_details[tasks_found].extra_info_str, state_desc);
 283
 284                 rtos->thread_details[tasks_found].exists = true;
 285
 286                 rtos->thread_details[tasks_found].display_str = NULL;
 287
 288                 tasks_found++;
 289                 prev_thread_ptr = thread_ptr;
 290
 291                 /* Get the location of the next thread structure. */
 292                 thread_ptr = 0;
 293                 retval = target_read_buffer(rtos->target,
 294                                 prev_thread_ptr + param->thread_next_offset,
 295                                 param->pointer_width,
 296                                 (uint8_t *) &thread_ptr);
 297                 if (retval != ERROR_OK) {
 298                         LOG_OUTPUT("Error reading next thread pointer in ThreadX thread list\r\n");
 299                         return retval;
 300                 }
 301         }
 302
 303         rtos->thread_count = tasks_found;
 304
 305         return 0;
 306 }
 307
 308 static int ThreadX_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char **hex_reg_list)
 309 {
 310         int retval;
 311         const struct ThreadX_params *param;
 312
 313         *hex_reg_list = NULL;
 314
 315         if (rtos == NULL)
 316                 return -1;
 317
 318         if (thread_id == 0)
 319                 return -2;
 320
 321         if (rtos->rtos_specific_params == NULL)
 322                 return -3;
 323
 324         param = (const struct ThreadX_params *) rtos->rtos_specific_params;
 325
 326         /* Read the stack pointer */
 327         int64_t stack_ptr = 0;
 328         retval = target_read_buffer(rtos->target,
 329                         thread_id + param->thread_stack_offset,
 330                         param->pointer_width,
 331                         (uint8_t *)&stack_ptr);
 332         if (retval != ERROR_OK) {
 333                 LOG_OUTPUT("Error reading stack frame from ThreadX thread\r\n");
 334                 return retval;
 335         }
 336
 337         return rtos_generic_stack_read(rtos->target, param->stacking_info, stack_ptr, hex_reg_list);
 338 }
 339
 340 static int ThreadX_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[])
 341 {
 342         unsigned int i;
 343         *symbol_list = (symbol_table_elem_t *) malloc(
 344                         sizeof(symbol_table_elem_t) * ARRAY_SIZE(ThreadX_symbol_list));
 345
 346         for (i = 0; i < ARRAY_SIZE(ThreadX_symbol_list); i++)
 347                 (*symbol_list)[i].symbol_name = ThreadX_symbol_list[i];
 348
 349         return 0;
 350 }
 351
 352 static int ThreadX_detect_rtos(struct target *target)
 353 {
 354         if ((target->rtos->symbols != NULL) &&
 355                         (target->rtos->symbols[ThreadX_VAL_tx_thread_created_ptr].address != 0)) {
 356                 /* looks like ThreadX */
 357                 return 1;
 358         }
 359         return 0;
 360 }
 361
 362 #if 0
 363
 364 static int ThreadX_set_current_thread(struct rtos *rtos, threadid_t thread_id)
 365 {
 366         return 0;
 367 }
 368
 369 static int ThreadX_get_thread_detail(struct rtos *rtos,
 370         threadid_t thread_id,
 371         struct thread_detail *detail)
 372 {
 373         unsigned int i = 0;
 374         int retval;
 375
 376 #define THREADX_THREAD_NAME_STR_SIZE (200)
 377         char tmp_str[THREADX_THREAD_NAME_STR_SIZE];
 378
 379         const struct ThreadX_params *param;
 380
 381         if (rtos == NULL)
 382                 return -1;
 383
 384         if (thread_id == 0)
 385                 return -2;
 386
 387         if (rtos->rtos_specific_params == NULL)
 388                 return -3;
 389
 390         param = (const struct ThreadX_params *) rtos->rtos_specific_params;
 391
 392         if (rtos->symbols == NULL) {
 393                 LOG_OUTPUT("No symbols for ThreadX\r\n");
 394                 return -3;
 395         }
 396
 397         detail->threadid = thread_id;
 398
 399         int64_t name_ptr = 0;
 400         /* read the name pointer */
 401         retval = target_read_buffer(rtos->target,
 402                         thread_id + param->thread_name_offset,
 403                         param->pointer_width,
 404                         (uint8_t *)&name_ptr);
 405         if (retval != ERROR_OK) {
 406                 LOG_OUTPUT("Could not read ThreadX thread name pointer from target\r\n");
 407                 return retval;
 408         }
 409
 410         /* Read the thread name */
 411         retval = target_read_buffer(rtos->target,
 412                         name_ptr,
 413                         THREADX_THREAD_NAME_STR_SIZE,
 414                         (uint8_t *)&tmp_str);
 415         if (retval != ERROR_OK) {
 416                 LOG_OUTPUT("Error reading thread name from ThreadX target\r\n");
 417                 return retval;
 418         }
 419         tmp_str[THREADX_THREAD_NAME_STR_SIZE-1] = '\x00';
 420
 421         if (tmp_str[0] == '\x00')
 422                 strcpy(tmp_str, "No Name");
 423
 424         detail->thread_name_str = (char *)malloc(strlen(tmp_str)+1);
 425
 426         /* Read the thread status */
 427         int64_t thread_status = 0;
 428         retval =
 429                 target_read_buffer(rtos->target,
 430                         thread_id + param->thread_state_offset,
 431                         4,
 432                         (uint8_t *)&thread_status);
 433         if (retval != ERROR_OK) {
 434                 LOG_OUTPUT("Error reading thread state from ThreadX target\r\n");
 435                 return retval;
 436         }
 437
 438         for (i = 0; (i < THREADX_NUM_STATES) &&
 439                         (ThreadX_thread_states[i].value != thread_status); i++) {
 440                 /* empty */
 441         }
 442
 443         char *state_desc;
 444         if  (i < THREADX_NUM_STATES)
 445                 state_desc = ThreadX_thread_states[i].desc;
 446         else
 447                 state_desc = "Unknown state";
 448
 449         detail->extra_info_str = (char *)malloc(strlen(state_desc)+1);
 450
 451         detail->exists = true;
 452
 453         detail->display_str = NULL;
 454
 455         return 0;
 456 }
 457
 458 #endif
 459
 460 static int ThreadX_create(struct target *target)
 461 {
 462         int i = 0;
 463         while ((i < THREADX_NUM_PARAMS) &&
 464                         (0 != strcmp(ThreadX_params_list[i].target_name, target->type->name))) {
 465                 i++;
 466         }
 467         if (i >= THREADX_NUM_PARAMS) {
 468                 LOG_OUTPUT("Could not find target in ThreadX compatibility list\r\n");
 469                 return -1;
 470         }
 471
 472         target->rtos->rtos_specific_params = (void *) &ThreadX_params_list[i];
 473         target->rtos->current_thread = 0;
 474         target->rtos->thread_details = NULL;
 475         return 0;
 476 }