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gdb: use strncmp rather than strstr
[openocd.git] / src / rtos / rtos.c
blob349f84df0a7c959f2881331af3f7695517a031c1
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 "rtos.h"
26 #include "target/target.h"
27 #include "helper/log.h"
28 #include "server/gdb_server.h"
29
30 static void hex_to_str(char *dst, char *hex_src);
31
32 /* RTOSs */
33 extern struct rtos_type FreeRTOS_rtos;
34 extern struct rtos_type ThreadX_rtos;
35 extern struct rtos_type eCos_rtos;
36 extern struct rtos_type Linux_os;
37 extern struct rtos_type ChibiOS_rtos;
38
39 static struct rtos_type *rtos_types[] = {
40 &ThreadX_rtos,
41 &FreeRTOS_rtos,
42 &eCos_rtos,
43 &Linux_os,
44 &ChibiOS_rtos,
45 NULL
46 };
47
48 int rtos_thread_packet(struct connection *connection, char *packet, int packet_size);
49
50 int rtos_smp_init(struct target *target)
51 {
52 if (target->rtos->type->smp_init)
53 return target->rtos->type->smp_init(target);
54 return ERROR_TARGET_INIT_FAILED;
55 }
56
57 static int os_alloc(struct target *target, struct rtos_type *ostype)
58 {
59 struct rtos *os = target->rtos = calloc(1, sizeof(struct rtos));
60
61 if (!os)
62 return JIM_ERR;
63
64 os->type = ostype;
65 os->current_threadid = -1;
66 os->current_thread = 0;
67 os->symbols = NULL;
68 os->target = target;
69
70 /* RTOS drivers can override the packet handler in _create(). */
71 os->gdb_thread_packet = rtos_thread_packet;
72
73 return JIM_OK;
74 }
75
76 static void os_free(struct target *target)
77 {
78 if (!target->rtos)
79 return;
80
81 if (target->rtos->symbols)
82 free(target->rtos->symbols);
83
84 free(target->rtos);
85 target->rtos = NULL;
86 }
87
88 static int os_alloc_create(struct target *target, struct rtos_type *ostype)
89 {
90 int ret = os_alloc(target, ostype);
91
92 if (JIM_OK == ret) {
93 ret = target->rtos->type->create(target);
94 if (ret != JIM_OK)
95 os_free(target);
96 }
97
98 return ret;
99 }
100
101 int rtos_create(Jim_GetOptInfo *goi, struct target *target)
102 {
103 int x;
104 char *cp;
105 struct Jim_Obj *res;
106
107 if (!goi->isconfigure && goi->argc != 0) {
108 Jim_WrongNumArgs(goi->interp, goi->argc, goi->argv, "NO PARAMS");
109 return JIM_ERR;
110 }
111
112 os_free(target);
113
114 Jim_GetOpt_String(goi, &cp, NULL);
115
116 if (0 == strcmp(cp, "auto")) {
117 /* Auto detect tries to look up all symbols for each RTOS,
118 * and runs the RTOS driver's _detect() function when GDB
119 * finds all symbols for any RTOS. See rtos_qsymbol(). */
120 target->rtos_auto_detect = true;
121
122 /* rtos_qsymbol() will iterate over all RTOSes. Allocate
123 * target->rtos here, and set it to the first RTOS type. */
124 return os_alloc(target, rtos_types[0]);
125 }
126
127 for (x = 0; rtos_types[x]; x++)
128 if (0 == strcmp(cp, rtos_types[x]->name))
129 return os_alloc_create(target, rtos_types[x]);
130
131 Jim_SetResultFormatted(goi->interp, "Unknown RTOS type %s, try one of: ", cp);
132 res = Jim_GetResult(goi->interp);
133 for (x = 0; rtos_types[x]; x++)
134 Jim_AppendStrings(goi->interp, res, rtos_types[x]->name, ", ", NULL);
135 Jim_AppendStrings(goi->interp, res, " or auto", NULL);
136
137 return JIM_ERR;
138 }
139
140 int gdb_thread_packet(struct connection *connection, char *packet, int packet_size)
141 {
142 struct target *target = get_target_from_connection(connection);
143 if (target->rtos == NULL)
144 return rtos_thread_packet(connection, packet, packet_size); /* thread not
145 *found*/
146 return target->rtos->gdb_thread_packet(connection, packet, packet_size);
147 }
148
149 static char *next_symbol(struct rtos *os, char *cur_symbol, uint64_t cur_addr)
150 {
151 symbol_table_elem_t *s;
152
153 if (!os->symbols)
154 os->type->get_symbol_list_to_lookup(&os->symbols);
155
156 if (!cur_symbol[0])
157 return os->symbols[0].symbol_name;
158
159 for (s = os->symbols; s->symbol_name; s++)
160 if (!strcmp(s->symbol_name, cur_symbol)) {
161 s->address = cur_addr;
162 s++;
163 return s->symbol_name;
164 }
165
166 return NULL;
167 }
168
169 /* rtos_qsymbol() processes and replies to all qSymbol packets from GDB.
170 *
171 * GDB sends a qSymbol:: packet (empty address, empty name) to notify
172 * that it can now answer qSymbol::hexcodedname queries, to look up symbols.
173 *
174 * If the qSymbol packet has no address that means GDB did not find the
175 * symbol, in which case auto-detect will move on to try the next RTOS.
176 *
177 * rtos_qsymbol() then calls the next_symbol() helper function, which
178 * iterates over symbol names for the current RTOS until it finds the
179 * symbol in the received GDB packet, and then returns the next entry
180 * in the list of symbols.
181 *
182 * If GDB replied about the last symbol for the RTOS and the RTOS was
183 * specified explicitly, then no further symbol lookup is done. When
184 * auto-detecting, the RTOS driver _detect() function must return success.
185 *
186 * rtos_qsymbol() returns 1 if an RTOS has been detected, or 0 otherwise.
187 */
188 int rtos_qsymbol(struct connection *connection, char *packet, int packet_size)
189 {
190 int rtos_detected = 0;
191 uint64_t addr;
192 size_t reply_len;
193 char reply[GDB_BUFFER_SIZE], cur_sym[GDB_BUFFER_SIZE / 2] = "", *next_sym;
194 struct target *target = get_target_from_connection(connection);
195 struct rtos *os = target->rtos;
196
197 reply_len = sprintf(reply, "OK");
198
199 if (!os)
200 goto done;
201
202 if (sscanf(packet, "qSymbol:%" SCNx64 ":", &addr))
203 hex_to_str(cur_sym, strchr(packet + 8, ':') + 1);
204 else if (target->rtos_auto_detect && !rtos_try_next(target))
205 goto done;
206
207 next_sym = next_symbol(os, cur_sym, addr);
208 if (!next_sym) {
209 if (!target->rtos_auto_detect) {
210 rtos_detected = 1;
211 goto done;
212 }
213
214 if (os->type->detect_rtos(target)) {
215 LOG_OUTPUT("Auto-detected RTOS: %s\r\n", os->type->name);
216 rtos_detected = 1;
217 goto done;
218 }
219
220 if (!rtos_try_next(target))
221 goto done;
222
223 os->type->get_symbol_list_to_lookup(&os->symbols);
224
225 next_sym = os->symbols[0].symbol_name;
226 if (!next_sym)
227 goto done;
228 }
229
230 if (8 + (strlen(next_sym) * 2) + 1 > sizeof(reply)) {
231 LOG_OUTPUT("ERROR: RTOS symbol '%s' name is too long for GDB!", next_sym);
232 goto done;
233 }
234
235 reply_len = sprintf(reply, "qSymbol:");
236 reply_len += str_to_hex(reply + reply_len, next_sym);
237
238 done:
239 gdb_put_packet(connection, reply, reply_len);
240 return rtos_detected;
241 }
242
243 int rtos_thread_packet(struct connection *connection, char *packet, int packet_size)
244 {
245 struct target *target = get_target_from_connection(connection);
246
247 if (strncmp(packet, "qThreadExtraInfo,", 17) == 0) {
248 if ((target->rtos != NULL) && (target->rtos->thread_details != NULL) &&
249 (target->rtos->thread_count != 0)) {
250 threadid_t threadid = 0;
251 int found = -1;
252 sscanf(packet, "qThreadExtraInfo,%" SCNx64, &threadid);
253
254 if ((target->rtos != NULL) && (target->rtos->thread_details != NULL)) {
255 int thread_num;
256 for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
257 if (target->rtos->thread_details[thread_num].threadid == threadid) {
258 if (target->rtos->thread_details[thread_num].exists)
259 found = thread_num;
260 }
261 }
262 }
263 if (found == -1) {
264 gdb_put_packet(connection, "E01", 3); /* thread not found */
265 return ERROR_OK;
266 }
267
268 struct thread_detail *detail = &target->rtos->thread_details[found];
269
270 int str_size = 0;
271 if (detail->display_str != NULL)
272 str_size += strlen(detail->display_str);
273 if (detail->thread_name_str != NULL)
274 str_size += strlen(detail->thread_name_str);
275 if (detail->extra_info_str != NULL)
276 str_size += strlen(detail->extra_info_str);
277
278 char *tmp_str = (char *) malloc(str_size + 7);
279 char *tmp_str_ptr = tmp_str;
280
281 if (detail->display_str != NULL)
282 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", detail->display_str);
283 if (detail->thread_name_str != NULL) {
284 if (tmp_str_ptr != tmp_str)
285 tmp_str_ptr += sprintf(tmp_str_ptr, " : ");
286 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", detail->thread_name_str);
287 }
288 if (detail->extra_info_str != NULL) {
289 if (tmp_str_ptr != tmp_str)
290 tmp_str_ptr += sprintf(tmp_str_ptr, " : ");
291 tmp_str_ptr +=
292 sprintf(tmp_str_ptr, " : %s", detail->extra_info_str);
293 }
294
295 assert(strlen(tmp_str) ==
296 (size_t) (tmp_str_ptr - tmp_str));
297
298 char *hex_str = (char *) malloc(strlen(tmp_str)*2 + 1);
299 str_to_hex(hex_str, tmp_str);
300
301 gdb_put_packet(connection, hex_str, strlen(hex_str));
302 free(hex_str);
303 free(tmp_str);
304 return ERROR_OK;
305
306 }
307 gdb_put_packet(connection, "", 0);
308 return ERROR_OK;
309 } else if (strncmp(packet, "qSymbol", 7) == 0) {
310 if (rtos_qsymbol(connection, packet, packet_size) == 1) {
311 target->rtos_auto_detect = false;
312 target->rtos->type->create(target);
313 target->rtos->type->update_threads(target->rtos);
314 }
315 return ERROR_OK;
316 } else if (strncmp(packet, "qfThreadInfo", 12) == 0) {
317 int i;
318 if ((target->rtos != NULL) && (target->rtos->thread_count != 0)) {
319
320 char *out_str = (char *) malloc(17 * target->rtos->thread_count + 5);
321 char *tmp_str = out_str;
322 tmp_str += sprintf(tmp_str, "m");
323 for (i = 0; i < target->rtos->thread_count; i++) {
324 if (i != 0)
325 tmp_str += sprintf(tmp_str, ",");
326 tmp_str += sprintf(tmp_str, "%016" PRIx64,
327 target->rtos->thread_details[i].threadid);
328 }
329 tmp_str[0] = 0;
330 gdb_put_packet(connection, out_str, strlen(out_str));
331 } else
332 gdb_put_packet(connection, "", 0);
333
334 return ERROR_OK;
335 } else if (strncmp(packet, "qsThreadInfo", 12) == 0) {
336 gdb_put_packet(connection, "l", 1);
337 return ERROR_OK;
338 } else if (strncmp(packet, "qAttached", 9) == 0) {
339 gdb_put_packet(connection, "1", 1);
340 return ERROR_OK;
341 } else if (strncmp(packet, "qOffsets", 8) == 0) {
342 char offsets[] = "Text=0;Data=0;Bss=0";
343 gdb_put_packet(connection, offsets, sizeof(offsets)-1);
344 return ERROR_OK;
345 } else if (strncmp(packet, "qC", 2) == 0) {
346 if (target->rtos != NULL) {
347 char buffer[19];
348 int size;
349 size = snprintf(buffer, 19, "QC%016" PRIx64, target->rtos->current_thread);
350 gdb_put_packet(connection, buffer, size);
351 } else
352 gdb_put_packet(connection, "QC0", 3);
353 return ERROR_OK;
354 } else if (packet[0] == 'T') { /* Is thread alive? */
355 threadid_t threadid;
356 int found = -1;
357 sscanf(packet, "T%" SCNx64, &threadid);
358 if ((target->rtos != NULL) && (target->rtos->thread_details != NULL)) {
359 int thread_num;
360 for (thread_num = 0; thread_num < target->rtos->thread_count; thread_num++) {
361 if (target->rtos->thread_details[thread_num].threadid == threadid) {
362 if (target->rtos->thread_details[thread_num].exists)
363 found = thread_num;
364 }
365 }
366 }
367 if (found != -1)
368 gdb_put_packet(connection, "OK", 2); /* thread alive */
369 else
370 gdb_put_packet(connection, "E01", 3); /* thread not found */
371 return ERROR_OK;
372 } else if (packet[0] == 'H') { /* Set current thread ( 'c' for step and continue, 'g' for
373 * all other operations ) */
374 if ((packet[1] == 'g') && (target->rtos != NULL))
375 sscanf(packet, "Hg%16" SCNx64, &target->rtos->current_threadid);
376 gdb_put_packet(connection, "OK", 2);
377 return ERROR_OK;
378 }
379
380 return GDB_THREAD_PACKET_NOT_CONSUMED;
381 }
382
383 int rtos_get_gdb_reg_list(struct connection *connection)
384 {
385 struct target *target = get_target_from_connection(connection);
386 int64_t current_threadid = target->rtos->current_threadid;
387 if ((target->rtos != NULL) && (current_threadid != -1) &&
388 (current_threadid != 0) &&
389 ((current_threadid != target->rtos->current_thread) ||
390 (target->smp))) { /* in smp several current thread are possible */
391 char *hex_reg_list;
392 target->rtos->type->get_thread_reg_list(target->rtos,
393 current_threadid,
394 &hex_reg_list);
395
396 if (hex_reg_list != NULL) {
397 gdb_put_packet(connection, hex_reg_list, strlen(hex_reg_list));
398 free(hex_reg_list);
399 return ERROR_OK;
400 }
401 }
402 return ERROR_FAIL;
403 }
404
405 int rtos_generic_stack_read(struct target *target,
406 const struct rtos_register_stacking *stacking,
407 int64_t stack_ptr,
408 char **hex_reg_list)
409 {
410 int list_size = 0;
411 char *tmp_str_ptr;
412 int64_t new_stack_ptr;
413 int i;
414 int retval;
415
416 if (stack_ptr == 0) {
417 LOG_OUTPUT("Error: null stack pointer in thread\r\n");
418 return -5;
419 }
420 /* Read the stack */
421 uint8_t *stack_data = (uint8_t *) malloc(stacking->stack_registers_size);
422 uint32_t address = stack_ptr;
423
424 if (stacking->stack_growth_direction == 1)
425 address -= stacking->stack_registers_size;
426 retval = target_read_buffer(target, address, stacking->stack_registers_size, stack_data);
427 if (retval != ERROR_OK) {
428 LOG_OUTPUT("Error reading stack frame from FreeRTOS thread\r\n");
429 return retval;
430 }
431 #if 0
432 LOG_OUTPUT("Stack Data :");
433 for (i = 0; i < stacking->stack_registers_size; i++)
434 LOG_OUTPUT("%02X", stack_data[i]);
435 LOG_OUTPUT("\r\n");
436 #endif
437 for (i = 0; i < stacking->num_output_registers; i++)
438 list_size += stacking->register_offsets[i].width_bits/8;
439 *hex_reg_list = (char *)malloc(list_size*2 + 1);
440 tmp_str_ptr = *hex_reg_list;
441 new_stack_ptr = stack_ptr - stacking->stack_growth_direction *
442 stacking->stack_registers_size;
443 if (stacking->stack_alignment != 0) {
444 /* Align new stack pointer to x byte boundary */
445 new_stack_ptr =
446 (new_stack_ptr & (~((int64_t) stacking->stack_alignment - 1))) +
447 ((stacking->stack_growth_direction == -1) ? stacking->stack_alignment : 0);
448 }
449 for (i = 0; i < stacking->num_output_registers; i++) {
450 int j;
451 for (j = 0; j < stacking->register_offsets[i].width_bits/8; j++) {
452 if (stacking->register_offsets[i].offset == -1)
453 tmp_str_ptr += sprintf(tmp_str_ptr, "%02x", 0);
454 else if (stacking->register_offsets[i].offset == -2)
455 tmp_str_ptr += sprintf(tmp_str_ptr, "%02x",
456 ((uint8_t *)&new_stack_ptr)[j]);
457 else
458 tmp_str_ptr += sprintf(tmp_str_ptr, "%02x",
459 stack_data[stacking->register_offsets[i].offset + j]);
460 }
461 }
462 /* LOG_OUTPUT("Output register string: %s\r\n", *hex_reg_list); */
463 return ERROR_OK;
464 }
465
466 int rtos_try_next(struct target *target)
467 {
468 struct rtos *os = target->rtos;
469 struct rtos_type **type = rtos_types;
470
471 if (!os)
472 return 0;
473
474 while (*type && os->type != *type)
475 type++;
476
477 if (!*type || !*(++type))
478 return 0;
479
480 os->type = *type;
481 if (os->symbols) {
482 free(os->symbols);
483 os->symbols = NULL;
484 }
485
486 return 1;
487 }
488
489 static void hex_to_str(char *dst, char *hex_src)
490 {
491 int src_pos = 0;
492 int dst_pos = 0;
493
494 while (hex_src[src_pos] != '\x00') {
495 char hex_char = hex_src[src_pos];
496 char hex_digit_val =
497 (hex_char >=
498 'a') ? hex_char-'a'+
499 10 : (hex_char >= 'A') ? hex_char-'A'+10 : hex_char-'0';
500 if (0 == (src_pos & 0x01)) {
501 dst[dst_pos] = hex_digit_val;
502 dst[dst_pos+1] = 0;
503 } else {
504 ((unsigned char *)dst)[dst_pos] <<= 4;
505 ((unsigned char *)dst)[dst_pos] += hex_digit_val;
506 dst_pos++;
507 }
508 src_pos++;
509 }
510
511 }
512
513 int str_to_hex(char *hex_dst, char *src)
514 {
515 char *posptr = hex_dst;
516 unsigned i;
517 for (i = 0; i < strlen(src); i++)
518 posptr += sprintf(posptr, "%02x", (unsigned char)src[i]);
519 return posptr - hex_dst;
520 }
521
522 int rtos_update_threads(struct target *target)
523 {
524 if ((target->rtos != NULL) && (target->rtos->type != NULL))
525 target->rtos->type->update_threads(target->rtos);
526 return ERROR_OK;
527 }
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