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   1 /***************************************************************************
   2  *   Copyright (C) 2014 by Marian Cingel                                   *
   3  *   cingel.marian@gmail.com                                               *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  17  ***************************************************************************/
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include <stdint.h>
  24 #include <helper/time_support.h>
  25 #include <jtag/jtag.h>
  26 #include "target/target.h"
  27 #include "target/target_type.h"
  28 #include "rtos.h"
  29 #include "helper/log.h"
  30 #include "helper/types.h"
  31 #include "rtos_mqx_stackings.h"
  32
  33 /* constants */
  34 #define MQX_THREAD_NAME_LENGTH                  (255)
  35 #define MQX_KERNEL_OFFSET_TDLIST                (0x0108)
  36 #define MQX_KERNEL_OFFSET_SYSTEM_TASK   (0x0050)
  37 #define MQX_KERNEL_OFFSET_ACTIVE_TASK   (0x001C)
  38 #define MQX_KERNEL_OFFSET_CAPABILITY    (0x0000)
  39 #define MQX_QUEUE_OFFSET_SIZE                   (0x0008)
  40 #define MQX_TASK_OFFSET_STATE                   (0x0008)
  41 #define MQX_TASK_OFFSET_ID                              (0x000c)
  42 #define MQX_TASK_OFFSET_TEMPLATE                (0x0068)
  43 #define MQX_TASK_OFFSET_STACK                   (0x0014)
  44 #define MQX_TASK_OFFSET_TDLIST                  (0x006C)
  45 #define MQX_TASK_OFFSET_NEXT                    (0x0000)
  46 #define MQX_TASK_TEMPLATE_OFFSET_NAME   (0x0010)
  47 #define MQX_TASK_OFFSET_ERROR_CODE              (0x005C)
  48 #define MQX_TASK_STATE_MASK                             (0xFFF)
  49
  50 /* types */
  51 enum mqx_symbols {
  52         MQX_VAL_MQX_KERNEL_DATA,
  53         MQX_VAL_MQX_INIT_STRUCT,
  54 };
  55
  56 enum mqx_arch {
  57         mqx_arch_cortexm,
  58 };
  59
  60 struct mqx_params {
  61         const char *target_name;
  62         const enum mqx_arch target_arch;
  63         const struct rtos_register_stacking *stacking_info;
  64 };
  65
  66 struct mqx_state {
  67         uint32_t state;
  68         char *name;
  69 };
  70
  71 /* local data */
  72 static const struct mqx_state mqx_states[] = {
  73         { 0x0002, "READY" },
  74         { 0x0003, "BLOCKED" },
  75         { 0x0005, "RCV_SPECIFIC_BLOCKED" },
  76         { 0x0007, "RCV_ANY_BLOCKED" },
  77         { 0x0009, "DYING" },
  78         { 0x000B, "UNHANDLED_INT_BLOCKED" },
  79         { 0x000D, "SEND_BLOCKED" },
  80         { 0x000F, "BREAKPOINT_BLOCKED" },
  81         { 0x0211, "IO_BLOCKED" },
  82         { 0x0021, "SEM_BLOCKED" },
  83         { 0x0223, "MUTEX_BLOCKED" },
  84         { 0x0025, "EVENT_BLOCKED" },
  85         { 0x0229, "TASK_QUEUE_BLOCKED" },
  86         { 0x042B, "LWSEM_BLOCKED" },
  87         { 0x042D, "LWEVENT_BLOCKED" },
  88 };
  89
  90 static const char * const mqx_symbol_list[] = {
  91         "_mqx_kernel_data",
  92         "MQX_init_struct",
  93         NULL
  94 };
  95
  96 static const struct mqx_params mqx_params_list[] = {
  97         { "cortex_m", mqx_arch_cortexm, &rtos_mqx_arm_v7m_stacking },
  98 };
  99
 100 /*
 101  * Perform simple address check to avoid bus fault.
 102  */
 103 static int mqx_valid_address_check(
 104         struct rtos *rtos,
 105         uint32_t address
 106 )
 107 {
 108         enum mqx_arch arch_type = ((struct mqx_params *)rtos->rtos_specific_params)->target_arch;
 109         const char *targetname = ((struct mqx_params *)rtos->rtos_specific_params)->target_name;
 110
 111         /* Cortex-M address range */
 112         if (arch_type == mqx_arch_cortexm) {
 113                 if (
 114                         /* code and sram area */
 115                         (address && address <= 0x3FFFFFFFu) ||
 116                         /* external ram area*/
 117                         (address >= 0x6000000u && address <= 0x9FFFFFFFu)
 118                 ) {
 119                         return ERROR_OK;
 120                 }
 121                 return ERROR_FAIL;
 122         }
 123         LOG_ERROR("MQX RTOS - unknown architecture %s", targetname);
 124         return ERROR_FAIL;
 125 }
 126
 127 /*
 128  * Wrapper of 'target_read_buffer' fn.
 129  * Include address check.
 130  */
 131 static int mqx_target_read_buffer(
 132         struct target *target,
 133         uint32_t address,
 134         uint32_t size,
 135         uint8_t *buffer
 136 )
 137 {
 138         int status = mqx_valid_address_check(target->rtos, address);
 139         if (status != ERROR_OK) {
 140                 LOG_WARNING("MQX RTOS - target address 0x%" PRIx32 " is not allowed to read", address);
 141                 return status;
 142         }
 143         status = target_read_buffer(target, address, size, buffer);
 144         if (status != ERROR_OK) {
 145                 LOG_ERROR("MQX RTOS - reading target address 0x%" PRIx32" failed", address);
 146                 return status;
 147         }
 148         return ERROR_OK;
 149 }
 150
 151 /*
 152  * Get symbol address if present
 153  */
 154 static int mqx_get_symbol(
 155         struct rtos *rtos,
 156         enum mqx_symbols symbol,
 157         void *result
 158 )
 159 {
 160         /* TODO: additional check ?? */
 161         (*(int *)result) = (uint32_t)rtos->symbols[symbol].address;
 162         return ERROR_OK;
 163 }
 164
 165 /*
 166  * Get value of struct member by passing
 167  * member offset, width and name (debug purpose)
 168  */
 169 static int mqx_get_member(
 170         struct rtos *rtos,
 171         const uint32_t base_address,
 172         int32_t member_offset,
 173         int32_t member_width,
 174         const char *member_name,
 175         void *result
 176 )
 177 {
 178         int status = ERROR_FAIL;
 179         status = mqx_target_read_buffer(
 180                 rtos->target, base_address + member_offset, member_width, result
 181         );
 182         if (status != ERROR_OK)
 183                 LOG_WARNING("MQX RTOS - cannot read \"%s\" at address 0x%" PRIx32,
 184                             member_name, (uint32_t)(base_address + member_offset));
 185         return status;
 186 }
 187
 188 /*
 189  * Check whether scheduler started
 190  */
 191 static int mqx_is_scheduler_running(
 192         struct rtos *rtos
 193 )
 194 {
 195         uint32_t kernel_data_symbol = 0;
 196         uint32_t kernel_data_addr = 0;
 197         uint32_t system_td_addr = 0;
 198         uint32_t active_td_addr = 0;
 199         uint32_t capability_value = 0;
 200
 201         /* get '_mqx_kernel_data' symbol */
 202         if (mqx_get_symbol(rtos, MQX_VAL_MQX_KERNEL_DATA, &kernel_data_symbol) != ERROR_OK)
 203                 return ERROR_FAIL;
 204
 205         /* get '_mqx_kernel_data' */
 206         if (mqx_get_member(rtos, kernel_data_symbol, 0, 4,
 207                 "_mqx_kernel_data", &kernel_data_addr) != ERROR_OK)
 208                 return ERROR_FAIL;
 209
 210         /* return if '_mqx_kernel_data' is NULL or default 0xFFFFFFFF */
 211         if (kernel_data_addr == 0 || kernel_data_addr == (uint32_t)(-1))
 212                 return ERROR_FAIL;
 213         /* get kernel_data->ADDRESSING_CAPABILITY */
 214         if (mqx_get_member(rtos, kernel_data_addr, MQX_KERNEL_OFFSET_CAPABILITY, 4,
 215                 "kernel_data->ADDRESSING_CAPABILITY", (void *)&capability_value) != ERROR_OK)
 216                 return ERROR_FAIL;
 217
 218         /* check first member, the '_mqx_kernel_data->ADDRESSING_CAPABILITY'.
 219            it suppose to be set to value 8 */
 220         if (capability_value != 8) {
 221                 LOG_WARNING("MQX RTOS - value of '_mqx_kernel_data->ADDRESSING_CAPABILITY' contains invalid value");
 222                 return ERROR_FAIL;
 223         }
 224         /* get active ptr */
 225         if (mqx_get_member(rtos, kernel_data_addr, MQX_KERNEL_OFFSET_ACTIVE_TASK, 4,
 226                 "kernel_data->ACTIVE_PTR", (void *)&active_td_addr) != ERROR_OK)
 227                 return ERROR_FAIL;
 228
 229         /* active task is system task, scheduler has not not run yet */
 230         system_td_addr = kernel_data_addr + MQX_KERNEL_OFFSET_SYSTEM_TASK;
 231         if (active_td_addr == system_td_addr) {
 232                 LOG_WARNING("MQX RTOS - scheduler does not run");
 233                 return ERROR_FAIL;
 234         }
 235         return ERROR_OK;
 236 }
 237
 238 /*
 239  * API function, return true if MQX is present
 240  */
 241 static bool mqx_detect_rtos(
 242         struct target *target
 243 )
 244 {
 245         if (
 246                 (target->rtos->symbols) &&
 247                 (target->rtos->symbols[MQX_VAL_MQX_KERNEL_DATA].address != 0)
 248         ) {
 249                 return true;
 250         }
 251         return false;
 252 }
 253
 254 /*
 255  * API function, pass MQX extra info to context data
 256  */
 257 static int mqx_create(
 258         struct target *target
 259 )
 260 {
 261         /* check target name against supported architectures */
 262         for (unsigned int i = 0; i < ARRAY_SIZE(mqx_params_list); i++) {
 263                 if (0 == strcmp(mqx_params_list[i].target_name, target->type->name)) {
 264                         target->rtos->rtos_specific_params = (void *)&mqx_params_list[i];
 265                         /* LOG_DEBUG("MQX RTOS - valid architecture: %s", target->type->name); */
 266                         return 0;
 267                 }
 268         }
 269         LOG_ERROR("MQX RTOS - could not find target \"%s\" in MQX compatibility list", target->type->name);
 270         return -1;
 271 }
 272
 273 /*
 274  * API function, update list of threads
 275  */
 276 static int mqx_update_threads(
 277         struct rtos *rtos
 278 )
 279 {
 280         uint32_t task_queue_addr = 0;
 281         uint32_t kernel_data_addr = 0;
 282         uint16_t task_queue_size = 0;
 283         uint32_t active_td_addr = 0;
 284
 285         if (!rtos->rtos_specific_params)
 286                 return -3;
 287
 288         if (!rtos->symbols)
 289                 return -4;
 290
 291         /* clear old data */
 292         rtos_free_threadlist(rtos);
 293         /* check scheduler */
 294         if (ERROR_OK != mqx_is_scheduler_running(rtos))
 295                 return ERROR_FAIL;
 296         /* get kernel_data symbol */
 297         if (mqx_get_symbol(rtos, MQX_VAL_MQX_KERNEL_DATA, &kernel_data_addr) != ERROR_OK)
 298                 return ERROR_FAIL;
 299
 300         /* read kernel_data */
 301         if (mqx_get_member(rtos, kernel_data_addr, 0, 4,
 302                 "_mqx_kernel_data", &kernel_data_addr) != ERROR_OK)
 303                 return ERROR_FAIL;
 304
 305         /* get task queue address */
 306         task_queue_addr = kernel_data_addr + MQX_KERNEL_OFFSET_TDLIST;
 307         /* get task queue size */
 308         if (mqx_get_member(rtos, task_queue_addr, MQX_QUEUE_OFFSET_SIZE, 2,
 309                 "kernel_data->TD_LIST.SIZE", &task_queue_size) != ERROR_OK)
 310                 return ERROR_FAIL;
 311
 312         /* get active ptr */
 313         if (mqx_get_member(rtos, kernel_data_addr, MQX_KERNEL_OFFSET_ACTIVE_TASK, 4,
 314                 "kernel_data->ACTIVE_PTR", (void *)&active_td_addr) != ERROR_OK)
 315                 return ERROR_FAIL;
 316
 317         /* setup threads info */
 318         rtos->thread_count = task_queue_size;
 319         rtos->current_thread = 0;
 320         rtos->thread_details = calloc(rtos->thread_count, sizeof(struct thread_detail));
 321         if (!rtos->thread_details)
 322                 return ERROR_FAIL;
 323
 324         /*      loop over each task and setup thread details,
 325                 the current_taskpool_addr is set to queue head
 326                 NOTE: debugging functions task create/destroy
 327                 might cause to show invalid data.
 328         */
 329         for (
 330                 uint32_t i = 0, taskpool_addr = task_queue_addr;
 331                 i < (uint32_t)rtos->thread_count;
 332                 i++
 333         ) {
 334                 uint8_t task_name[MQX_THREAD_NAME_LENGTH + 1];
 335                 uint32_t task_addr = 0, task_template = 0, task_state = 0;
 336                 uint32_t task_name_addr = 0, task_id = 0, task_errno = 0;
 337                 uint32_t state_index = 0;
 338                 uint32_t extra_info_length = 0;
 339                 char *state_name = "Unknown";
 340
 341                 /* set current taskpool address */
 342                 if (mqx_get_member(rtos, taskpool_addr, MQX_TASK_OFFSET_NEXT, 4,
 343                         "td_struct_ptr->NEXT", &taskpool_addr) != ERROR_OK)
 344                         return ERROR_FAIL;
 345
 346                 /* get task address from taskpool */
 347                 task_addr = taskpool_addr - MQX_TASK_OFFSET_TDLIST;
 348                 /* get address of 'td_struct_ptr->TEMPLATE_LIST_PTR' */
 349                 if (mqx_get_member(rtos, task_addr, MQX_TASK_OFFSET_TEMPLATE, 4,
 350                         "td_struct_ptr->TEMPLATE_LIST_PTR", &task_template) != ERROR_OK)
 351                         return ERROR_FAIL;
 352
 353                 /* get address of 'td_struct_ptr->TEMPLATE_LIST_PTR->NAME' */
 354                 if (mqx_get_member(rtos, task_template, MQX_TASK_TEMPLATE_OFFSET_NAME, 4,
 355                         "td_struct_ptr->TEMPLATE_LIST_PTR->NAME", &task_name_addr) != ERROR_OK)
 356                         return ERROR_FAIL;
 357
 358                 /* get value of 'td_struct->TEMPLATE_LIST_PTR->NAME' */
 359                 if (mqx_get_member(rtos, task_name_addr, 0, MQX_THREAD_NAME_LENGTH,
 360                         "*td_struct_ptr->TEMPLATE_LIST_PTR->NAME", task_name) != ERROR_OK)
 361                         return ERROR_FAIL;
 362
 363                 /* always terminate last character by force,
 364                    otherwise openocd might fail if task_name
 365                    has corrupted data */
 366                 task_name[MQX_THREAD_NAME_LENGTH] = '\0';
 367                 /* get value of 'td_struct_ptr->TASK_ID' */
 368                 if (mqx_get_member(rtos, task_addr, MQX_TASK_OFFSET_ID, 4,
 369                         "td_struct_ptr->TASK_ID", &task_id) != ERROR_OK)
 370                         return ERROR_FAIL;
 371
 372                 /* get task errno */
 373                 if (mqx_get_member(rtos, task_addr, MQX_TASK_OFFSET_ERROR_CODE, 4,
 374                         "td_struct_ptr->TASK_ERROR_CODE", &task_errno) != ERROR_OK)
 375                         return ERROR_FAIL;
 376
 377                 /* get value of 'td_struct_ptr->STATE' */
 378                 if (mqx_get_member(rtos, task_addr, MQX_TASK_OFFSET_STATE, 4,
 379                         "td_struct_ptr->STATE", &task_state) != ERROR_OK)
 380                         return ERROR_FAIL;
 381
 382                 task_state &= MQX_TASK_STATE_MASK;
 383                 /* and search for defined state */
 384                 for (state_index = 0; state_index < ARRAY_SIZE(mqx_states); state_index++) {
 385                         if (mqx_states[state_index].state == task_state) {
 386                                 state_name = mqx_states[state_index].name;
 387                                 break;
 388                         }
 389                 }
 390
 391                 /* setup thread details struct */
 392                 rtos->thread_details[i].threadid = task_id;
 393                 rtos->thread_details[i].exists = true;
 394                 /* set thread name */
 395                 rtos->thread_details[i].thread_name_str = malloc(strlen((void *)task_name) + 1);
 396                 if (!rtos->thread_details[i].thread_name_str)
 397                         return ERROR_FAIL;
 398                 strcpy(rtos->thread_details[i].thread_name_str, (void *)task_name);
 399                 /* set thread extra info
 400                  * - task state
 401                  * - task address
 402                  * - task errno
 403                  * calculate length as:
 404                  * state length + address length + errno length + formatter length
 405                  */
 406                 extra_info_length += strlen((void *)state_name) + 7 + 13 + 8 + 15 + 8;
 407                 rtos->thread_details[i].extra_info_str = malloc(extra_info_length + 1);
 408                 if (!rtos->thread_details[i].extra_info_str)
 409                         return ERROR_FAIL;
 410                 snprintf(rtos->thread_details[i].extra_info_str, extra_info_length,
 411                          "State: %s, Address: 0x%" PRIx32 ",  Error Code: %" PRIu32,
 412                          state_name, task_addr, task_errno
 413                 );
 414                 /* set active thread */
 415                 if (active_td_addr == task_addr)
 416                         rtos->current_thread = task_id;
 417         }
 418         return ERROR_OK;
 419 }
 420
 421 /*
 422  * API function, get info of selected thread
 423  */
 424 static int mqx_get_thread_reg_list(
 425         struct rtos *rtos,
 426         int64_t thread_id,
 427         struct rtos_reg **reg_list,
 428         int *num_regs
 429 )
 430 {
 431         int64_t stack_ptr = 0;
 432         uint32_t my_task_addr = 0;
 433         uint32_t task_queue_addr = 0;
 434         uint32_t task_queue_size = 0;
 435         uint32_t kernel_data_addr = 0;
 436
 437         if (thread_id == 0) {
 438                 LOG_ERROR("MQX RTOS - invalid threadid: 0x%X", (int)thread_id);
 439                 return ERROR_FAIL;
 440         }
 441         if (ERROR_OK != mqx_is_scheduler_running(rtos))
 442                 return ERROR_FAIL;
 443         /* get kernel_data symbol */
 444         if (mqx_get_symbol(rtos, MQX_VAL_MQX_KERNEL_DATA, &kernel_data_addr) != ERROR_OK)
 445                 return ERROR_FAIL;
 446
 447         /* read kernel_data */
 448         if (mqx_get_member(rtos, kernel_data_addr, 0, 4,
 449                 "_mqx_kernel_data", &kernel_data_addr) != ERROR_OK)
 450                 return ERROR_FAIL;
 451
 452         /* get task queue address */
 453         task_queue_addr = kernel_data_addr + MQX_KERNEL_OFFSET_TDLIST;
 454         /* get task queue size */
 455         if (mqx_get_member(rtos, task_queue_addr, MQX_QUEUE_OFFSET_SIZE, 2,
 456                 "kernel_data->TD_LIST.SIZE", &task_queue_size) != ERROR_OK)
 457                 return ERROR_FAIL;
 458
 459         /* search for taskid */
 460         for (
 461                 uint32_t i = 0, taskpool_addr = task_queue_addr;
 462                 i < (uint32_t)rtos->thread_count;
 463                 i++
 464         ) {
 465                 uint32_t tmp_address = 0, task_addr = 0;
 466                 uint32_t task_id = 0;
 467                 /* set current taskpool address */
 468                 tmp_address = taskpool_addr;
 469                 if (mqx_get_member(rtos, tmp_address, MQX_TASK_OFFSET_NEXT, 4,
 470                         "td_struct_ptr->NEXT", &taskpool_addr) != ERROR_OK)
 471                         return ERROR_FAIL;
 472
 473                 /* get task address from taskpool */
 474                 task_addr = taskpool_addr - MQX_TASK_OFFSET_TDLIST;
 475                 /* get value of td_struct->TASK_ID */
 476                 if (mqx_get_member(rtos, task_addr, MQX_TASK_OFFSET_ID, 4,
 477                         "td_struct_ptr->TASK_ID", &task_id) != ERROR_OK)
 478                         return ERROR_FAIL;
 479
 480                 /* found taskid, break */
 481                 if (task_id == thread_id) {
 482                         my_task_addr = task_addr;
 483                         break;
 484                 }
 485         }
 486         if (!my_task_addr) {
 487                 LOG_ERROR("MQX_RTOS - threadid %" PRId64 " does not match any task", thread_id);
 488                 return ERROR_FAIL;
 489         }
 490         /* get task stack head address */
 491         if (mqx_get_member(rtos, my_task_addr, MQX_TASK_OFFSET_STACK, 4,
 492                 "task->STACK_PTR", &stack_ptr) != ERROR_OK)
 493                 return ERROR_FAIL;
 494
 495         return rtos_generic_stack_read(
 496                 rtos->target, ((struct mqx_params *)rtos->rtos_specific_params)->stacking_info, stack_ptr, reg_list, num_regs
 497         );
 498 }
 499
 500 /* API function, export list of required symbols */
 501 static int mqx_get_symbol_list_to_lookup(struct symbol_table_elem *symbol_list[])
 502 {
 503         *symbol_list = calloc(ARRAY_SIZE(mqx_symbol_list), sizeof(struct symbol_table_elem));
 504         if (!*symbol_list)
 505                 return ERROR_FAIL;
 506         /* export required symbols */
 507         for (int i = 0; i < (int)(ARRAY_SIZE(mqx_symbol_list)); i++)
 508                 (*symbol_list)[i].symbol_name = mqx_symbol_list[i];
 509         return ERROR_OK;
 510 }
 511
 512 struct rtos_type mqx_rtos = {
 513         .name = "mqx",
 514         .detect_rtos = mqx_detect_rtos,
 515         .create = mqx_create,
 516         .update_threads = mqx_update_threads,
 517         .get_thread_reg_list = mqx_get_thread_reg_list,
 518         .get_symbol_list_to_lookup = mqx_get_symbol_list_to_lookup,
 519 };