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jtag/drivers: remove useless checks causing build failure with clang 3.5.0
[openocd.git] / src / rtos / FreeRTOS.c
blob8f66c4ca0c98b6482a237670795c3b892f50054d
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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 #define FREERTOS_MAX_PRIORITIES 63
35
36 #define FreeRTOS_STRUCT(int_type, ptr_type, list_prev_offset)
37
38 struct FreeRTOS_params {
39 const char *target_name;
40 const unsigned char thread_count_width;
41 const unsigned char pointer_width;
42 const unsigned char list_next_offset;
43 const unsigned char list_width;
44 const unsigned char list_elem_next_offset;
45 const unsigned char list_elem_content_offset;
46 const unsigned char thread_stack_offset;
47 const unsigned char thread_name_offset;
48 const struct rtos_register_stacking *stacking_info;
49 };
50
51 static const struct FreeRTOS_params FreeRTOS_params_list[] = {
52 {
53 "cortex_m", /* target_name */
54 4, /* thread_count_width; */
55 4, /* pointer_width; */
56 16, /* list_next_offset; */
57 20, /* list_width; */
58 8, /* list_elem_next_offset; */
59 12, /* list_elem_content_offset */
60 0, /* thread_stack_offset; */
61 52, /* thread_name_offset; */
62 &rtos_standard_Cortex_M3_stacking, /* stacking_info */
63 },
64 {
65 "hla_target", /* target_name */
66 4, /* thread_count_width; */
67 4, /* pointer_width; */
68 16, /* list_next_offset; */
69 20, /* list_width; */
70 8, /* list_elem_next_offset; */
71 12, /* list_elem_content_offset */
72 0, /* thread_stack_offset; */
73 52, /* thread_name_offset; */
74 &rtos_standard_Cortex_M3_stacking, /* stacking_info */
75 },
76 {
77 "nds32_v3", /* target_name */
78 4, /* thread_count_width; */
79 4, /* pointer_width; */
80 16, /* list_next_offset; */
81 20, /* list_width; */
82 8, /* list_elem_next_offset; */
83 12, /* list_elem_content_offset */
84 0, /* thread_stack_offset; */
85 52, /* thread_name_offset; */
86 &rtos_standard_NDS32_N1068_stacking, /* stacking_info */
87 },
88 };
89
90 #define FREERTOS_NUM_PARAMS ((int)(sizeof(FreeRTOS_params_list)/sizeof(struct FreeRTOS_params)))
91
92 static int FreeRTOS_detect_rtos(struct target *target);
93 static int FreeRTOS_create(struct target *target);
94 static int FreeRTOS_update_threads(struct rtos *rtos);
95 static int FreeRTOS_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char **hex_reg_list);
96 static int FreeRTOS_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[]);
97
98 struct rtos_type FreeRTOS_rtos = {
99 .name = "FreeRTOS",
100
101 .detect_rtos = FreeRTOS_detect_rtos,
102 .create = FreeRTOS_create,
103 .update_threads = FreeRTOS_update_threads,
104 .get_thread_reg_list = FreeRTOS_get_thread_reg_list,
105 .get_symbol_list_to_lookup = FreeRTOS_get_symbol_list_to_lookup,
106 };
107
108 enum FreeRTOS_symbol_values {
109 FreeRTOS_VAL_pxCurrentTCB = 0,
110 FreeRTOS_VAL_pxReadyTasksLists = 1,
111 FreeRTOS_VAL_xDelayedTaskList1 = 2,
112 FreeRTOS_VAL_xDelayedTaskList2 = 3,
113 FreeRTOS_VAL_pxDelayedTaskList = 4,
114 FreeRTOS_VAL_pxOverflowDelayedTaskList = 5,
115 FreeRTOS_VAL_xPendingReadyList = 6,
116 FreeRTOS_VAL_xTasksWaitingTermination = 7,
117 FreeRTOS_VAL_xSuspendedTaskList = 8,
118 FreeRTOS_VAL_uxCurrentNumberOfTasks = 9,
119 FreeRTOS_VAL_uxTopUsedPriority = 10,
120 };
121
122 static const char * const FreeRTOS_symbol_list[] = {
123 "pxCurrentTCB",
124 "pxReadyTasksLists",
125 "xDelayedTaskList1",
126 "xDelayedTaskList2",
127 "pxDelayedTaskList",
128 "pxOverflowDelayedTaskList",
129 "xPendingReadyList",
130 "xTasksWaitingTermination",
131 "xSuspendedTaskList",
132 "uxCurrentNumberOfTasks",
133 "uxTopUsedPriority",
134 NULL
135 };
136
137 /* TODO: */
138 /* this is not safe for little endian yet */
139 /* may be problems reading if sizes are not 32 bit long integers. */
140 /* test mallocs for failure */
141
142 static int FreeRTOS_update_threads(struct rtos *rtos)
143 {
144 int i = 0;
145 int retval;
146 int tasks_found = 0;
147 const struct FreeRTOS_params *param;
148
149 if (rtos->rtos_specific_params == NULL)
150 return -1;
151
152 param = (const struct FreeRTOS_params *) rtos->rtos_specific_params;
153
154 if (rtos->symbols == NULL) {
155 LOG_ERROR("No symbols for FreeRTOS");
156 return -3;
157 }
158
159 if (rtos->symbols[FreeRTOS_VAL_uxCurrentNumberOfTasks].address == 0) {
160 LOG_ERROR("Don't have the number of threads in FreeRTOS");
161 return -2;
162 }
163
164 int thread_list_size = 0;
165 retval = target_read_buffer(rtos->target,
166 rtos->symbols[FreeRTOS_VAL_uxCurrentNumberOfTasks].address,
167 param->thread_count_width,
168 (uint8_t *)&thread_list_size);
169
170 if (retval != ERROR_OK) {
171 LOG_ERROR("Could not read FreeRTOS thread count from target");
172 return retval;
173 }
174
175 /* wipe out previous thread details if any */
176 rtos_free_threadlist(rtos);
177
178 /* read the current thread */
179 retval = target_read_buffer(rtos->target,
180 rtos->symbols[FreeRTOS_VAL_pxCurrentTCB].address,
181 param->pointer_width,
182 (uint8_t *)&rtos->current_thread);
183 if (retval != ERROR_OK) {
184 LOG_ERROR("Error reading current thread in FreeRTOS thread list");
185 return retval;
186 }
187
188 if ((thread_list_size == 0) || (rtos->current_thread == 0)) {
189 /* Either : No RTOS threads - there is always at least the current execution though */
190 /* OR : No current thread - all threads suspended - show the current execution
191 * of idling */
192 char tmp_str[] = "Current Execution";
193 thread_list_size++;
194 tasks_found++;
195 rtos->thread_details = malloc(
196 sizeof(struct thread_detail) * thread_list_size);
197 if (!rtos->thread_details) {
198 LOG_ERROR("Error allocating memory for %d threads", thread_list_size);
199 return ERROR_FAIL;
200 }
201 rtos->thread_details->threadid = 1;
202 rtos->thread_details->exists = true;
203 rtos->thread_details->display_str = NULL;
204 rtos->thread_details->extra_info_str = NULL;
205 rtos->thread_details->thread_name_str = malloc(sizeof(tmp_str));
206 strcpy(rtos->thread_details->thread_name_str, tmp_str);
207
208 if (thread_list_size == 1) {
209 rtos->thread_count = 1;
210 return ERROR_OK;
211 }
212 } else {
213 /* create space for new thread details */
214 rtos->thread_details = malloc(
215 sizeof(struct thread_detail) * thread_list_size);
216 if (!rtos->thread_details) {
217 LOG_ERROR("Error allocating memory for %d threads", thread_list_size);
218 return ERROR_FAIL;
219 }
220 }
221
222 /* Find out how many lists are needed to be read from pxReadyTasksLists, */
223 int64_t max_used_priority = 0;
224 retval = target_read_buffer(rtos->target,
225 rtos->symbols[FreeRTOS_VAL_uxTopUsedPriority].address,
226 param->pointer_width,
227 (uint8_t *)&max_used_priority);
228 if (retval != ERROR_OK)
229 return retval;
230 if (max_used_priority > FREERTOS_MAX_PRIORITIES) {
231 LOG_ERROR("FreeRTOS maximum used priority is unreasonably big, not proceeding: %" PRId64 "",
232 max_used_priority);
233 return ERROR_FAIL;
234 }
235
236 symbol_address_t *list_of_lists =
237 malloc(sizeof(symbol_address_t) *
238 (max_used_priority+1 + 5));
239 if (!list_of_lists) {
240 LOG_ERROR("Error allocating memory for %" PRId64 " priorities", max_used_priority);
241 return ERROR_FAIL;
242 }
243
244 int num_lists;
245 for (num_lists = 0; num_lists <= max_used_priority; num_lists++)
246 list_of_lists[num_lists] = rtos->symbols[FreeRTOS_VAL_pxReadyTasksLists].address +
247 num_lists * param->list_width;
248
249 list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xDelayedTaskList1].address;
250 list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xDelayedTaskList2].address;
251 list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xPendingReadyList].address;
252 list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xSuspendedTaskList].address;
253 list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xTasksWaitingTermination].address;
254
255 for (i = 0; i < num_lists; i++) {
256 if (list_of_lists[i] == 0)
257 continue;
258
259 /* Read the number of threads in this list */
260 int64_t list_thread_count = 0;
261 retval = target_read_buffer(rtos->target,
262 list_of_lists[i],
263 param->thread_count_width,
264 (uint8_t *)&list_thread_count);
265 if (retval != ERROR_OK) {
266 LOG_ERROR("Error reading number of threads in FreeRTOS thread list");
267 free(list_of_lists);
268 return retval;
269 }
270
271 if (list_thread_count == 0)
272 continue;
273
274 /* Read the location of first list item */
275 uint64_t prev_list_elem_ptr = -1;
276 uint64_t list_elem_ptr = 0;
277 retval = target_read_buffer(rtos->target,
278 list_of_lists[i] + param->list_next_offset,
279 param->pointer_width,
280 (uint8_t *)&list_elem_ptr);
281 if (retval != ERROR_OK) {
282 LOG_ERROR("Error reading first thread item location in FreeRTOS thread list");
283 free(list_of_lists);
284 return retval;
285 }
286
287 while ((list_thread_count > 0) && (list_elem_ptr != 0) &&
288 (list_elem_ptr != prev_list_elem_ptr) &&
289 (tasks_found < thread_list_size)) {
290 /* Get the location of the thread structure. */
291 rtos->thread_details[tasks_found].threadid = 0;
292 retval = target_read_buffer(rtos->target,
293 list_elem_ptr + param->list_elem_content_offset,
294 param->pointer_width,
295 (uint8_t *)&(rtos->thread_details[tasks_found].threadid));
296 if (retval != ERROR_OK) {
297 LOG_ERROR("Error reading thread list item object in FreeRTOS thread list");
298 free(list_of_lists);
299 return retval;
300 }
301
302 /* get thread name */
303
304 #define FREERTOS_THREAD_NAME_STR_SIZE (200)
305 char tmp_str[FREERTOS_THREAD_NAME_STR_SIZE];
306
307 /* Read the thread name */
308 retval = target_read_buffer(rtos->target,
309 rtos->thread_details[tasks_found].threadid + param->thread_name_offset,
310 FREERTOS_THREAD_NAME_STR_SIZE,
311 (uint8_t *)&tmp_str);
312 if (retval != ERROR_OK) {
313 LOG_ERROR("Error reading first thread item location in FreeRTOS thread list");
314 free(list_of_lists);
315 return retval;
316 }
317 tmp_str[FREERTOS_THREAD_NAME_STR_SIZE-1] = '\x00';
318
319 if (tmp_str[0] == '\x00')
320 strcpy(tmp_str, "No Name");
321
322 rtos->thread_details[tasks_found].thread_name_str =
323 malloc(strlen(tmp_str)+1);
324 strcpy(rtos->thread_details[tasks_found].thread_name_str, tmp_str);
325 rtos->thread_details[tasks_found].display_str = NULL;
326 rtos->thread_details[tasks_found].exists = true;
327
328 if (rtos->thread_details[tasks_found].threadid == rtos->current_thread) {
329 char running_str[] = "Running";
330 rtos->thread_details[tasks_found].extra_info_str = malloc(
331 sizeof(running_str));
332 strcpy(rtos->thread_details[tasks_found].extra_info_str,
333 running_str);
334 } else
335 rtos->thread_details[tasks_found].extra_info_str = NULL;
336
337 tasks_found++;
338 list_thread_count--;
339
340 prev_list_elem_ptr = list_elem_ptr;
341 list_elem_ptr = 0;
342 retval = target_read_buffer(rtos->target,
343 prev_list_elem_ptr + param->list_elem_next_offset,
344 param->pointer_width,
345 (uint8_t *)&list_elem_ptr);
346 if (retval != ERROR_OK) {
347 LOG_ERROR("Error reading next thread item location in FreeRTOS thread list");
348 free(list_of_lists);
349 return retval;
350 }
351 }
352 }
353
354 free(list_of_lists);
355 rtos->thread_count = tasks_found;
356 return 0;
357 }
358
359 static int FreeRTOS_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char **hex_reg_list)
360 {
361 int retval;
362 const struct FreeRTOS_params *param;
363 int64_t stack_ptr = 0;
364
365 *hex_reg_list = NULL;
366 if (rtos == NULL)
367 return -1;
368
369 if (thread_id == 0)
370 return -2;
371
372 if (rtos->rtos_specific_params == NULL)
373 return -1;
374
375 param = (const struct FreeRTOS_params *) rtos->rtos_specific_params;
376
377 /* Read the stack pointer */
378 retval = target_read_buffer(rtos->target,
379 thread_id + param->thread_stack_offset,
380 param->pointer_width,
381 (uint8_t *)&stack_ptr);
382 if (retval != ERROR_OK) {
383 LOG_ERROR("Error reading stack frame from FreeRTOS thread");
384 return retval;
385 }
386
387 return rtos_generic_stack_read(rtos->target, param->stacking_info, stack_ptr, hex_reg_list);
388 }
389
390 static int FreeRTOS_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[])
391 {
392 unsigned int i;
393 *symbol_list = calloc(
394 ARRAY_SIZE(FreeRTOS_symbol_list), sizeof(symbol_table_elem_t));
395
396 for (i = 0; i < ARRAY_SIZE(FreeRTOS_symbol_list); i++)
397 (*symbol_list)[i].symbol_name = FreeRTOS_symbol_list[i];
398
399 return 0;
400 }
401
402 #if 0
403
404 static int FreeRTOS_set_current_thread(struct rtos *rtos, threadid_t thread_id)
405 {
406 return 0;
407 }
408
409 static int FreeRTOS_get_thread_ascii_info(struct rtos *rtos, threadid_t thread_id, char **info)
410 {
411 int retval;
412 const struct FreeRTOS_params *param;
413
414 if (rtos == NULL)
415 return -1;
416
417 if (thread_id == 0)
418 return -2;
419
420 if (rtos->rtos_specific_params == NULL)
421 return -3;
422
423 param = (const struct FreeRTOS_params *) rtos->rtos_specific_params;
424
425 #define FREERTOS_THREAD_NAME_STR_SIZE (200)
426 char tmp_str[FREERTOS_THREAD_NAME_STR_SIZE];
427
428 /* Read the thread name */
429 retval = target_read_buffer(rtos->target,
430 thread_id + param->thread_name_offset,
431 FREERTOS_THREAD_NAME_STR_SIZE,
432 (uint8_t *)&tmp_str);
433 if (retval != ERROR_OK) {
434 LOG_ERROR("Error reading first thread item location in FreeRTOS thread list");
435 return retval;
436 }
437 tmp_str[FREERTOS_THREAD_NAME_STR_SIZE-1] = '\x00';
438
439 if (tmp_str[0] == '\x00')
440 strcpy(tmp_str, "No Name");
441
442 *info = malloc(strlen(tmp_str)+1);
443 strcpy(*info, tmp_str);
444 return 0;
445 }
446
447 #endif
448
449 static int FreeRTOS_detect_rtos(struct target *target)
450 {
451 if ((target->rtos->symbols != NULL) &&
452 (target->rtos->symbols[FreeRTOS_VAL_pxReadyTasksLists].address != 0)) {
453 /* looks like FreeRTOS */
454 return 1;
455 }
456 return 0;
457 }
458
459 static int FreeRTOS_create(struct target *target)
460 {
461 int i = 0;
462 while ((i < FREERTOS_NUM_PARAMS) &&
463 (0 != strcmp(FreeRTOS_params_list[i].target_name, target->type->name))) {
464 i++;
465 }
466 if (i >= FREERTOS_NUM_PARAMS) {
467 LOG_ERROR("Could not find target in FreeRTOS compatibility list");
468 return -1;
469 }
470
471 target->rtos->rtos_specific_params = (void *) &FreeRTOS_params_list[i];
472 return 0;
473 }
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