aboutsummaryrefslogtreecommitdiff
path: root/src/rtos/FreeRTOS.c
blob: 51bd35e4ef4b4a9ff61d84a74ab2fc0b0c5eb1f8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
/***************************************************************************
 *   Copyright (C) 2011 by Broadcom Corporation                            *
 *   Evan Hunter - ehunter@broadcom.com                                    *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <helper/time_support.h>
#include <jtag/jtag.h>
#include "target/target.h"
#include "target/target_type.h"
#include "rtos.h"
#include "helper/log.h"
#include "helper/types.h"
#include "rtos_standard_stackings.h"

#define FREERTOS_MAX_PRIORITIES	63

#define FreeRTOS_STRUCT(int_type, ptr_type, list_prev_offset)

struct FreeRTOS_params {
	const char *target_name;
	const unsigned char thread_count_width;
	const unsigned char pointer_width;
	const unsigned char list_next_offset;
	const unsigned char list_width;
	const unsigned char list_elem_next_offset;
	const unsigned char list_elem_content_offset;
	const unsigned char thread_stack_offset;
	const unsigned char thread_name_offset;
	const struct rtos_register_stacking *stacking_info;
};

const struct FreeRTOS_params FreeRTOS_params_list[] = {
	{
	"cortex_m",			/* target_name */
	4,						/* thread_count_width; */
	4,						/* pointer_width; */
	16,						/* list_next_offset; */
	20,						/* list_width; */
	8,						/* list_elem_next_offset; */
	12,						/* list_elem_content_offset */
	0,						/* thread_stack_offset; */
	52,						/* thread_name_offset; */
	&rtos_standard_Cortex_M3_stacking,	/* stacking_info */
	},
	{
	"hla_target",			/* target_name */
	4,						/* thread_count_width; */
	4,						/* pointer_width; */
	16,						/* list_next_offset; */
	20,						/* list_width; */
	8,						/* list_elem_next_offset; */
	12,						/* list_elem_content_offset */
	0,						/* thread_stack_offset; */
	52,						/* thread_name_offset; */
	&rtos_standard_Cortex_M3_stacking,	/* stacking_info */
	}
};

#define FREERTOS_NUM_PARAMS ((int)(sizeof(FreeRTOS_params_list)/sizeof(struct FreeRTOS_params)))

static int FreeRTOS_detect_rtos(struct target *target);
static int FreeRTOS_create(struct target *target);
static int FreeRTOS_update_threads(struct rtos *rtos);
static int FreeRTOS_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char **hex_reg_list);
static int FreeRTOS_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[]);

struct rtos_type FreeRTOS_rtos = {
	.name = "FreeRTOS",

	.detect_rtos = FreeRTOS_detect_rtos,
	.create = FreeRTOS_create,
	.update_threads = FreeRTOS_update_threads,
	.get_thread_reg_list = FreeRTOS_get_thread_reg_list,
	.get_symbol_list_to_lookup = FreeRTOS_get_symbol_list_to_lookup,
};

enum FreeRTOS_symbol_values {
	FreeRTOS_VAL_pxCurrentTCB = 0,
	FreeRTOS_VAL_pxReadyTasksLists = 1,
	FreeRTOS_VAL_xDelayedTaskList1 = 2,
	FreeRTOS_VAL_xDelayedTaskList2 = 3,
	FreeRTOS_VAL_pxDelayedTaskList = 4,
	FreeRTOS_VAL_pxOverflowDelayedTaskList = 5,
	FreeRTOS_VAL_xPendingReadyList = 6,
	FreeRTOS_VAL_xTasksWaitingTermination = 7,
	FreeRTOS_VAL_xSuspendedTaskList = 8,
	FreeRTOS_VAL_uxCurrentNumberOfTasks = 9,
	FreeRTOS_VAL_uxTopUsedPriority = 10,
};

static char *FreeRTOS_symbol_list[] = {
	"pxCurrentTCB",
	"pxReadyTasksLists",
	"xDelayedTaskList1",
	"xDelayedTaskList2",
	"pxDelayedTaskList",
	"pxOverflowDelayedTaskList",
	"xPendingReadyList",
	"xTasksWaitingTermination",
	"xSuspendedTaskList",
	"uxCurrentNumberOfTasks",
	"uxTopUsedPriority",
	NULL
};

/* TODO: */
/* this is not safe for little endian yet */
/* may be problems reading if sizes are not 32 bit long integers. */
/* test mallocs for failure */

static int FreeRTOS_update_threads(struct rtos *rtos)
{
	int i = 0;
	int retval;
	int tasks_found = 0;
	const struct FreeRTOS_params *param;

	if (rtos->rtos_specific_params == NULL)
		return -1;

	param = (const struct FreeRTOS_params *) rtos->rtos_specific_params;

	if (rtos->symbols == NULL) {
		LOG_ERROR("No symbols for FreeRTOS");
		return -3;
	}

	if (rtos->symbols[FreeRTOS_VAL_uxCurrentNumberOfTasks].address == 0) {
		LOG_ERROR("Don't have the number of threads in FreeRTOS");
		return -2;
	}

	int thread_list_size = 0;
	retval = target_read_buffer(rtos->target,
			rtos->symbols[FreeRTOS_VAL_uxCurrentNumberOfTasks].address,
			param->thread_count_width,
			(uint8_t *)&thread_list_size);

	if (retval != ERROR_OK) {
		LOG_ERROR("Could not read FreeRTOS thread count from target");
		return retval;
	}

	/* wipe out previous thread details if any */
	if (rtos->thread_details != NULL) {
		int j;
		for (j = 0; j < rtos->thread_count; j++) {
			if (rtos->thread_details[j].display_str != NULL) {
				free(rtos->thread_details[j].display_str);
				rtos->thread_details[j].display_str = NULL;
			}
			if (rtos->thread_details[j].thread_name_str != NULL) {
				free(rtos->thread_details[j].thread_name_str);
				rtos->thread_details[j].thread_name_str = NULL;
			}
			if (rtos->thread_details[j].extra_info_str != NULL) {
				free(rtos->thread_details[j].extra_info_str);
				rtos->thread_details[j].extra_info_str = NULL;
			}
		}
		free(rtos->thread_details);
		rtos->thread_details = NULL;
	}

	/* read the current thread */
	retval = target_read_buffer(rtos->target,
			rtos->symbols[FreeRTOS_VAL_pxCurrentTCB].address,
			param->pointer_width,
			(uint8_t *)&rtos->current_thread);
	if (retval != ERROR_OK) {
		LOG_ERROR("Error reading current thread in FreeRTOS thread list");
		return retval;
	}

	if ((thread_list_size  == 0) || (rtos->current_thread == 0)) {
		/* Either : No RTOS threads - there is always at least the current execution though */
		/* OR     : No current thread - all threads suspended - show the current execution
		 * of idling */
		char tmp_str[] = "Current Execution";
		thread_list_size++;
		tasks_found++;
		rtos->thread_details = (struct thread_detail *) malloc(
				sizeof(struct thread_detail) * thread_list_size);
		if (!rtos->thread_details) {
			LOG_ERROR("Error allocating memory for %d threads", thread_list_size);
			return ERROR_FAIL;
		}
		rtos->thread_details->threadid = 1;
		rtos->thread_details->exists = true;
		rtos->thread_details->display_str = NULL;
		rtos->thread_details->extra_info_str = NULL;
		rtos->thread_details->thread_name_str = (char *) malloc(sizeof(tmp_str));
		strcpy(rtos->thread_details->thread_name_str, tmp_str);

		if (thread_list_size == 1) {
			rtos->thread_count = 1;
			return ERROR_OK;
		}
	} else {
		/* create space for new thread details */
		rtos->thread_details = (struct thread_detail *) malloc(
				sizeof(struct thread_detail) * thread_list_size);
		if (!rtos->thread_details) {
			LOG_ERROR("Error allocating memory for %d threads", thread_list_size);
			return ERROR_FAIL;
		}
	}

	/* Find out how many lists are needed to be read from pxReadyTasksLists, */
	int64_t max_used_priority = 0;
	retval = target_read_buffer(rtos->target,
			rtos->symbols[FreeRTOS_VAL_uxTopUsedPriority].address,
			param->pointer_width,
			(uint8_t *)&max_used_priority);
	if (retval != ERROR_OK)
		return retval;
	if (max_used_priority > FREERTOS_MAX_PRIORITIES) {
		LOG_ERROR("FreeRTOS maximum used priority is unreasonably big, not proceeding: %" PRId64 "",
			max_used_priority);
		return ERROR_FAIL;
	}

	symbol_address_t *list_of_lists =
		(symbol_address_t *)malloc(sizeof(symbol_address_t) *
			(max_used_priority+1 + 5));
	if (!list_of_lists) {
		LOG_ERROR("Error allocating memory for %" PRId64 " priorities", max_used_priority);
		return ERROR_FAIL;
	}

	int num_lists;
	for (num_lists = 0; num_lists <= max_used_priority; num_lists++)
		list_of_lists[num_lists] = rtos->symbols[FreeRTOS_VAL_pxReadyTasksLists].address +
			num_lists * param->list_width;

	list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xDelayedTaskList1].address;
	list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xDelayedTaskList2].address;
	list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xPendingReadyList].address;
	list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xSuspendedTaskList].address;
	list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xTasksWaitingTermination].address;

	for (i = 0; i < num_lists; i++) {
		if (list_of_lists[i] == 0)
			continue;

		/* Read the number of threads in this list */
		int64_t list_thread_count = 0;
		retval = target_read_buffer(rtos->target,
				list_of_lists[i],
				param->thread_count_width,
				(uint8_t *)&list_thread_count);
		if (retval != ERROR_OK) {
			LOG_ERROR("Error reading number of threads in FreeRTOS thread list");
			free(list_of_lists);
			return retval;
		}

		if (list_thread_count == 0)
			continue;

		/* Read the location of first list item */
		uint64_t prev_list_elem_ptr = -1;
		uint64_t list_elem_ptr = 0;
		retval = target_read_buffer(rtos->target,
				list_of_lists[i] + param->list_next_offset,
				param->pointer_width,
				(uint8_t *)&list_elem_ptr);
		if (retval != ERROR_OK) {
			LOG_ERROR("Error reading first thread item location in FreeRTOS thread list");
			free(list_of_lists);
			return retval;
		}

		while ((list_thread_count > 0) && (list_elem_ptr != 0) &&
				(list_elem_ptr != prev_list_elem_ptr) &&
				(tasks_found < thread_list_size)) {
			/* Get the location of the thread structure. */
			rtos->thread_details[tasks_found].threadid = 0;
			retval = target_read_buffer(rtos->target,
					list_elem_ptr + param->list_elem_content_offset,
					param->pointer_width,
					(uint8_t *)&(rtos->thread_details[tasks_found].threadid));
			if (retval != ERROR_OK) {
				LOG_ERROR("Error reading thread list item object in FreeRTOS thread list");
				free(list_of_lists);
				return retval;
			}

			/* get thread name */

			#define FREERTOS_THREAD_NAME_STR_SIZE (200)
			char tmp_str[FREERTOS_THREAD_NAME_STR_SIZE];

			/* Read the thread name */
			retval = target_read_buffer(rtos->target,
					rtos->thread_details[tasks_found].threadid + param->thread_name_offset,
					FREERTOS_THREAD_NAME_STR_SIZE,
					(uint8_t *)&tmp_str);
			if (retval != ERROR_OK) {
				LOG_ERROR("Error reading first thread item location in FreeRTOS thread list");
				free(list_of_lists);
				return retval;
			}
			tmp_str[FREERTOS_THREAD_NAME_STR_SIZE-1] = '\x00';

			if (tmp_str[0] == '\x00')
				strcpy(tmp_str, "No Name");

			rtos->thread_details[tasks_found].thread_name_str =
				(char *)malloc(strlen(tmp_str)+1);
			strcpy(rtos->thread_details[tasks_found].thread_name_str, tmp_str);
			rtos->thread_details[tasks_found].display_str = NULL;
			rtos->thread_details[tasks_found].exists = true;

			if (rtos->thread_details[tasks_found].threadid == rtos->current_thread) {
				char running_str[] = "Running";
				rtos->thread_details[tasks_found].extra_info_str = (char *) malloc(
						sizeof(running_str));
				strcpy(rtos->thread_details[tasks_found].extra_info_str,
					running_str);
			} else
				rtos->thread_details[tasks_found].extra_info_str = NULL;

			tasks_found++;
			list_thread_count--;

			prev_list_elem_ptr = list_elem_ptr;
			list_elem_ptr = 0;
			retval = target_read_buffer(rtos->target,
					prev_list_elem_ptr + param->list_elem_next_offset,
					param->pointer_width,
					(uint8_t *)&list_elem_ptr);
			if (retval != ERROR_OK) {
				LOG_ERROR("Error reading next thread item location in FreeRTOS thread list");
				free(list_of_lists);
				return retval;
			}
		}
	}

	free(list_of_lists);
	rtos->thread_count = tasks_found;
	return 0;
}

static int FreeRTOS_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char **hex_reg_list)
{
	int retval;
	const struct FreeRTOS_params *param;
	int64_t stack_ptr = 0;

	*hex_reg_list = NULL;
	if (rtos == NULL)
		return -1;

	if (thread_id == 0)
		return -2;

	if (rtos->rtos_specific_params == NULL)
		return -1;

	param = (const struct FreeRTOS_params *) rtos->rtos_specific_params;

	/* Read the stack pointer */
	retval = target_read_buffer(rtos->target,
			thread_id + param->thread_stack_offset,
			param->pointer_width,
			(uint8_t *)&stack_ptr);
	if (retval != ERROR_OK) {
		LOG_ERROR("Error reading stack frame from FreeRTOS thread");
		return retval;
	}

	return rtos_generic_stack_read(rtos->target, param->stacking_info, stack_ptr, hex_reg_list);
}

static int FreeRTOS_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[])
{
	unsigned int i;
	*symbol_list = (symbol_table_elem_t *) malloc(
			sizeof(symbol_table_elem_t) * ARRAY_SIZE(FreeRTOS_symbol_list));

	for (i = 0; i < ARRAY_SIZE(FreeRTOS_symbol_list); i++)
		(*symbol_list)[i].symbol_name = FreeRTOS_symbol_list[i];

	return 0;
}

#if 0

static int FreeRTOS_set_current_thread(struct rtos *rtos, threadid_t thread_id)
{
	return 0;
}

static int FreeRTOS_get_thread_ascii_info(struct rtos *rtos, threadid_t thread_id, char **info)
{
	int retval;
	const struct FreeRTOS_params *param;

	if (rtos == NULL)
		return -1;

	if (thread_id == 0)
		return -2;

	if (rtos->rtos_specific_params == NULL)
		return -3;

	param = (const struct FreeRTOS_params *) rtos->rtos_specific_params;

#define FREERTOS_THREAD_NAME_STR_SIZE (200)
	char tmp_str[FREERTOS_THREAD_NAME_STR_SIZE];

	/* Read the thread name */
	retval = target_read_buffer(rtos->target,
			thread_id + param->thread_name_offset,
			FREERTOS_THREAD_NAME_STR_SIZE,
			(uint8_t *)&tmp_str);
	if (retval != ERROR_OK) {
		LOG_ERROR("Error reading first thread item location in FreeRTOS thread list");
		return retval;
	}
	tmp_str[FREERTOS_THREAD_NAME_STR_SIZE-1] = '\x00';

	if (tmp_str[0] == '\x00')
		strcpy(tmp_str, "No Name");

	*info = (char *)malloc(strlen(tmp_str)+1);
	strcpy(*info, tmp_str);
	return 0;
}

#endif

static int FreeRTOS_detect_rtos(struct target *target)
{
	if ((target->rtos->symbols != NULL) &&
			(target->rtos->symbols[FreeRTOS_VAL_pxReadyTasksLists].address != 0)) {
		/* looks like FreeRTOS */
		return 1;
	}
	return 0;
}

static int FreeRTOS_create(struct target *target)
{
	int i = 0;
	while ((i < FREERTOS_NUM_PARAMS) &&
			(0 != strcmp(FreeRTOS_params_list[i].target_name, target->type->name))) {
		i++;
	}
	if (i >= FREERTOS_NUM_PARAMS) {
		LOG_ERROR("Could not find target in FreeRTOS compatibility list");
		return -1;
	}

	target->rtos->rtos_specific_params = (void *) &FreeRTOS_params_list[i];
	return 0;
}