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rtos/linux.c: fix clang static analyzer warning
[openocd.git] / src / rtos / linux.c
1 /***************************************************************************
2 * Copyright (C) 2011 by STEricsson *
3 * Heythem Bouhaja heythem.bouhaja@stericsson.com : creation *
4 * Michel JAOUEN michel.jaouen@stericsson.com : adaptation to rtos *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
18 ***************************************************************************/
19
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include <helper/time_support.h>
25 #include <jtag/jtag.h>
26 #include "target/target.h"
27 #include "target/target_type.h"
28 #include "helper/log.h"
29 #include "helper/types.h"
30 #include "rtos.h"
31 #include "rtos_standard_stackings.h"
32 #include <target/register.h>
33 #include "server/gdb_server.h"
34
35 #define LINUX_USER_KERNEL_BORDER 0xc0000000
36 #include "linux_header.h"
37 #define PHYS
38 #define MAX_THREADS 200
39 /* specific task */
40 struct linux_os {
41 const char *name;
42 uint32_t init_task_addr;
43 int thread_count;
44 int threadid_count;
45 int preupdtate_threadid_count;
46 int nr_cpus;
47 int threads_lookup;
48 int threads_needs_update;
49 struct current_thread *current_threads;
50 struct threads *thread_list;
51 /* virt2phys parameter */
52 uint32_t phys_mask;
53 uint32_t phys_base;
54 };
55
56 struct current_thread {
57 int64_t threadid;
58 int32_t core_id;
59 #ifdef PID_CHECK
60 uint32_t pid;
61 #endif
62 uint32_t TS;
63 struct current_thread *next;
64 };
65
66 struct threads {
67 char name[17];
68 uint32_t base_addr; /* address to read magic */
69 uint32_t state; /* magic value : filled only at creation */
70 uint32_t pid; /* linux pid : id for identifying a thread */
71 uint32_t oncpu; /* content cpu number in current thread */
72 uint32_t asid; /* filled only at creation */
73 int64_t threadid;
74 int status; /* dead = 1 alive = 2 current = 3 alive and current */
75 /* value that should not change during the live of a thread ? */
76 uint32_t thread_info_addr; /* contain latest thread_info_addr computed */
77 /* retrieve from thread_info */
78 struct cpu_context *context;
79 struct threads *next;
80 };
81
82 struct cpu_context {
83 uint32_t R4;
84 uint32_t R5;
85 uint32_t R6;
86 uint32_t R7;
87 uint32_t R8;
88 uint32_t R9;
89 uint32_t IP;
90 uint32_t FP;
91 uint32_t SP;
92 uint32_t PC;
93 uint32_t preempt_count;
94 };
95 struct cpu_context *cpu_context_read(struct target *target, uint32_t base_addr,
96 uint32_t *info_addr);
97 static int insert_into_threadlist(struct target *target, struct threads *t);
98
99 static int linux_os_create(struct target *target);
100
101 static int linux_os_dummy_update(struct rtos *rtos)
102 {
103 /* update is done only when thread request come
104 * too many thread to do it on each stop */
105 return 0;
106 }
107
108 static int linux_compute_virt2phys(struct target *target, target_addr_t address)
109 {
110 struct linux_os *linux_os = (struct linux_os *)
111 target->rtos->rtos_specific_params;
112 target_addr_t pa = 0;
113 int retval = target->type->virt2phys(target, address, &pa);
114 if (retval != ERROR_OK) {
115 LOG_ERROR("Cannot compute linux virt2phys translation");
116 /* fixes default address */
117 linux_os->phys_base = 0;
118 return ERROR_FAIL;
119 }
120
121 linux_os->init_task_addr = address;
122 address = address & linux_os->phys_mask;
123 linux_os->phys_base = pa - address;
124 return ERROR_OK;
125 }
126
127 static int linux_read_memory(struct target *target,
128 uint32_t address, uint32_t size, uint32_t count,
129 uint8_t *buffer)
130 {
131 #ifdef PHYS
132 struct linux_os *linux_os = (struct linux_os *)
133 target->rtos->rtos_specific_params;
134 uint32_t pa = (address & linux_os->phys_mask) + linux_os->phys_base;
135 #endif
136 if (address < 0xc000000) {
137 LOG_ERROR("linux awareness : address in user space");
138 return ERROR_FAIL;
139 }
140 #ifdef PHYS
141 target_read_phys_memory(target, pa, size, count, buffer);
142 #endif
143 target_read_memory(target, address, size, count, buffer);
144 return ERROR_OK;
145 }
146
147 static char *reg_converter(char *buffer, void *reg, int size)
148 {
149 int i;
150
151 for (i = 0; i < size; i++)
152 buffer += sprintf(buffer, "%02x", ((uint8_t *) reg)[i]);
153
154 return buffer;
155 }
156
157 int fill_buffer(struct target *target, uint32_t addr, uint8_t *buffer)
158 {
159
160 if ((addr & 0xfffffffc) != addr)
161 LOG_INFO("unaligned address %" PRIx32 "!!", addr);
162
163 int retval = linux_read_memory(target, addr, 4, 1, buffer);
164 return retval;
165
166 }
167
168 uint32_t get_buffer(struct target *target, const uint8_t *buffer)
169 {
170 uint32_t value = 0;
171 const uint8_t *value_ptr = buffer;
172 value = target_buffer_get_u32(target, value_ptr);
173 return value;
174 }
175
176 static int linux_os_thread_reg_list(struct rtos *rtos,
177 int64_t thread_id, char **hex_reg_list)
178 {
179 struct target *target = rtos->target;
180 struct linux_os *linux_os = (struct linux_os *)
181 target->rtos->rtos_specific_params;
182 int i = 0;
183 struct current_thread *tmp = linux_os->current_threads;
184 struct current_thread *next;
185 char *hex_string;
186 int found = 0;
187 int retval;
188 /* check if a current thread is requested */
189 next = tmp;
190
191 do {
192 if (next->threadid == thread_id)
193 found = 1;
194 else
195 next = next->next;
196 } while ((found == 0) && (next != tmp) && (next != NULL));
197
198 if (found == 1) {
199 /* search target to perfom the access */
200 struct reg **reg_list;
201 int reg_list_size, reg_packet_size = 0;
202 struct target_list *head;
203 head = target->head;
204 found = 0;
205 do {
206 if (head->target->coreid == next->core_id) {
207
208 target = head->target;
209 found = 1;
210 } else
211 head = head->next;
212
213 } while ((head != (struct target_list *)NULL) && (found == 0));
214
215 if (found == 0) {
216 LOG_ERROR
217 (
218 "current thread %" PRIx64 ": no target to perform access of core id %" PRIx32,
219 thread_id,
220 next->core_id);
221 return ERROR_FAIL;
222 }
223
224 /*LOG_INFO("thread %lx current on core %x",thread_id,
225 * target->coreid);*/
226 retval =
227 target_get_gdb_reg_list(target, &reg_list, &reg_list_size,
228 REG_CLASS_GENERAL);
229
230 if (retval != ERROR_OK)
231 return retval;
232
233 for (i = 0; i < reg_list_size; i++)
234 reg_packet_size += reg_list[i]->size;
235
236 assert(reg_packet_size > 0);
237
238 *hex_reg_list = malloc(DIV_ROUND_UP(reg_packet_size, 8) * 2);
239
240 hex_string = *hex_reg_list;
241
242 for (i = 0; i < reg_list_size; i++) {
243 if (!reg_list[i]->valid)
244 reg_list[i]->type->get(reg_list[i]);
245
246 hex_string = reg_converter(hex_string,
247 reg_list[i]->value,
248 (reg_list[i]->size) / 8);
249 }
250
251 free(reg_list);
252
253 } else {
254 struct threads *temp = linux_os->thread_list;
255 *hex_reg_list = calloc(1, 500 * sizeof(char));
256 hex_string = *hex_reg_list;
257
258 for (i = 0; i < 16; i++)
259 hex_string += sprintf(hex_string, "%02x", 0);
260
261 while ((temp != NULL) &&
262 (temp->threadid != target->rtos->current_threadid))
263 temp = temp->next;
264
265 if (temp != NULL) {
266 if (temp->context == NULL)
267 temp->context = cpu_context_read(target,
268 temp->
269 base_addr,
270 &temp->
271 thread_info_addr);
272
273 hex_string =
274 reg_converter(hex_string, &temp->context->R4, 4);
275 hex_string =
276 reg_converter(hex_string, &temp->context->R5, 4);
277 hex_string =
278 reg_converter(hex_string, &temp->context->R6, 4);
279 hex_string =
280 reg_converter(hex_string, &temp->context->R7, 4);
281 hex_string =
282 reg_converter(hex_string, &temp->context->R8, 4);
283 hex_string =
284 reg_converter(hex_string, &temp->context->R9, 4);
285
286 for (i = 0; i < 4; i++) /*R10 = 0x0 */
287 hex_string += sprintf(hex_string, "%02x", 0);
288
289 hex_string =
290 reg_converter(hex_string, &temp->context->FP, 4);
291 hex_string =
292 reg_converter(hex_string, &temp->context->IP, 4);
293 hex_string =
294 reg_converter(hex_string, &temp->context->SP, 4);
295
296 for (i = 0; i < 4; i++)
297 hex_string += sprintf(hex_string, "%02x", 0);
298
299 hex_string =
300 reg_converter(hex_string, &temp->context->PC, 4);
301
302 for (i = 0; i < 100; i++) /*100 */
303 hex_string += sprintf(hex_string, "%02x", 0);
304
305 uint32_t cpsr = 0x00000000;
306 reg_converter(hex_string, &cpsr, 4);
307 }
308 }
309 return ERROR_OK;
310 }
311
312 static bool linux_os_detect(struct target *target)
313 {
314 LOG_INFO("should no be called");
315 return false;
316 }
317
318 static int linux_os_smp_init(struct target *target);
319 static int linux_os_clean(struct target *target);
320 #define INIT_TASK 0
321 static const char * const linux_symbol_list[] = {
322 "init_task",
323 NULL
324 };
325
326 static int linux_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[])
327 {
328 unsigned int i;
329 *symbol_list = (symbol_table_elem_t *)
330 calloc(ARRAY_SIZE(linux_symbol_list), sizeof(symbol_table_elem_t));
331
332 for (i = 0; i < ARRAY_SIZE(linux_symbol_list); i++)
333 (*symbol_list)[i].symbol_name = linux_symbol_list[i];
334
335 return 0;
336 }
337
338 static char *linux_ps_command(struct target *target);
339
340 const struct rtos_type Linux_os = {
341 .name = "linux",
342 .detect_rtos = linux_os_detect,
343 .create = linux_os_create,
344 .smp_init = linux_os_smp_init,
345 .update_threads = linux_os_dummy_update,
346 .get_thread_reg_list = linux_os_thread_reg_list,
347 .get_symbol_list_to_lookup = linux_get_symbol_list_to_lookup,
348 .clean = linux_os_clean,
349 .ps_command = linux_ps_command,
350 };
351
352 static int linux_thread_packet(struct connection *connection, char const *packet,
353 int packet_size);
354 static void linux_identify_current_threads(struct target *target);
355
356 #ifdef PID_CHECK
357 int fill_task_pid(struct target *target, struct threads *t)
358 {
359 uint32_t pid_addr = t->base_addr + PID;
360 uint8_t buffer[4];
361 int retval = fill_buffer(target, pid_addr, buffer);
362
363 if (retval == ERROR_OK) {
364 uint32_t val = get_buffer(target, buffer);
365 t->pid = val;
366 } else
367 LOG_ERROR("fill_task_pid: unable to read memory");
368
369 return retval;
370 }
371 #endif
372
373 int fill_task(struct target *target, struct threads *t)
374 {
375 int retval;
376 uint32_t pid_addr = t->base_addr + PID;
377 uint32_t mem_addr = t->base_addr + MEM;
378 uint32_t on_cpu = t->base_addr + ONCPU;
379 uint8_t *buffer = calloc(1, 4);
380 retval = fill_buffer(target, t->base_addr, buffer);
381
382 if (retval == ERROR_OK) {
383 uint32_t val = get_buffer(target, buffer);
384 t->state = val;
385 } else
386 LOG_ERROR("fill_task: unable to read memory");
387
388 retval = fill_buffer(target, pid_addr, buffer);
389
390 if (retval == ERROR_OK) {
391 uint32_t val = get_buffer(target, buffer);
392 t->pid = val;
393 } else
394 LOG_ERROR("fill task: unable to read memory");
395
396 retval = fill_buffer(target, on_cpu, buffer);
397
398 if (retval == ERROR_OK) {
399 uint32_t val = get_buffer(target, buffer);
400 t->oncpu = val;
401 } else
402 LOG_ERROR("fill task: unable to read memory");
403
404 retval = fill_buffer(target, mem_addr, buffer);
405
406 if (retval == ERROR_OK) {
407 uint32_t val = get_buffer(target, buffer);
408
409 if (val != 0) {
410 uint32_t asid_addr = val + MM_CTX;
411 retval = fill_buffer(target, asid_addr, buffer);
412
413 if (retval == ERROR_OK) {
414 val = get_buffer(target, buffer);
415 t->asid = val;
416 } else
417 LOG_ERROR
418 ("fill task: unable to read memory -- ASID");
419 } else
420 t->asid = 0;
421 } else
422 LOG_ERROR("fill task: unable to read memory");
423
424 free(buffer);
425
426 return retval;
427 }
428
429 int get_name(struct target *target, struct threads *t)
430 {
431 int retval;
432 uint32_t full_name[4];
433 uint32_t comm = t->base_addr + COMM;
434 int i;
435
436 for (i = 0; i < 17; i++)
437 t->name[i] = 0;
438
439 retval = linux_read_memory(target, comm, 4, 4, (uint8_t *) full_name);
440
441 if (retval != ERROR_OK) {
442 LOG_ERROR("get_name: unable to read memory\n");
443 return ERROR_FAIL;
444 }
445
446 uint32_t raw_name = target_buffer_get_u32(target,
447 (const uint8_t *)
448 &full_name[0]);
449 t->name[3] = raw_name >> 24;
450 t->name[2] = raw_name >> 16;
451 t->name[1] = raw_name >> 8;
452 t->name[0] = raw_name;
453 raw_name =
454 target_buffer_get_u32(target, (const uint8_t *)&full_name[1]);
455 t->name[7] = raw_name >> 24;
456 t->name[6] = raw_name >> 16;
457 t->name[5] = raw_name >> 8;
458 t->name[4] = raw_name;
459 raw_name =
460 target_buffer_get_u32(target, (const uint8_t *)&full_name[2]);
461 t->name[11] = raw_name >> 24;
462 t->name[10] = raw_name >> 16;
463 t->name[9] = raw_name >> 8;
464 t->name[8] = raw_name;
465 raw_name =
466 target_buffer_get_u32(target, (const uint8_t *)&full_name[3]);
467 t->name[15] = raw_name >> 24;
468 t->name[14] = raw_name >> 16;
469 t->name[13] = raw_name >> 8;
470 t->name[12] = raw_name;
471 return ERROR_OK;
472
473 }
474
475 int get_current(struct target *target, int create)
476 {
477 struct target_list *head;
478 head = target->head;
479 uint8_t *buf;
480 uint32_t val;
481 uint32_t ti_addr;
482 uint8_t *buffer = calloc(1, 4);
483 struct linux_os *linux_os = (struct linux_os *)
484 target->rtos->rtos_specific_params;
485 struct current_thread *ctt = linux_os->current_threads;
486
487 /* invalid current threads content */
488 while (ctt != NULL) {
489 ctt->threadid = -1;
490 ctt->TS = 0xdeadbeef;
491 ctt = ctt->next;
492 }
493
494 while (head != (struct target_list *)NULL) {
495 struct reg **reg_list;
496 int reg_list_size;
497 int retval;
498
499 if (target_get_gdb_reg_list(head->target, &reg_list,
500 &reg_list_size, REG_CLASS_GENERAL) != ERROR_OK) {
501 free(buffer);
502 return ERROR_TARGET_FAILURE;
503 }
504
505 if (!reg_list[13]->valid)
506 reg_list[13]->type->get(reg_list[13]);
507
508 buf = reg_list[13]->value;
509 val = get_buffer(target, buf);
510 ti_addr = (val & 0xffffe000);
511 uint32_t TS_addr = ti_addr + 0xc;
512 retval = fill_buffer(target, TS_addr, buffer);
513
514 if (retval == ERROR_OK) {
515 uint32_t TS = get_buffer(target, buffer);
516 uint32_t cpu, on_cpu = TS + ONCPU;
517 retval = fill_buffer(target, on_cpu, buffer);
518
519 if (retval == ERROR_OK) {
520 /*uint32_t cpu = get_buffer(target, buffer);*/
521 struct current_thread *ct =
522 linux_os->current_threads;
523 cpu = head->target->coreid;
524
525 while ((ct != NULL) && (ct->core_id != (int32_t) cpu))
526 ct = ct->next;
527
528 if ((ct != NULL) && (ct->TS == 0xdeadbeef))
529 ct->TS = TS;
530 else
531 LOG_ERROR
532 ("error in linux current thread update");
533
534 if (create && ct) {
535 struct threads *t;
536 t = calloc(1, sizeof(struct threads));
537 t->base_addr = ct->TS;
538 fill_task(target, t);
539 get_name(target, t);
540 t->oncpu = cpu;
541 insert_into_threadlist(target, t);
542 t->status = 3;
543 t->thread_info_addr = 0xdeadbeef;
544 ct->threadid = t->threadid;
545 linux_os->thread_count++;
546 #ifdef PID_CHECK
547 ct->pid = t->pid;
548 #endif
549 /*LOG_INFO("Creation of current thread %s",t->name);*/
550 }
551 }
552 }
553
554 free(reg_list);
555 head = head->next;
556 }
557
558 free(buffer);
559
560 return ERROR_OK;
561 }
562
563 struct cpu_context *cpu_context_read(struct target *target, uint32_t base_addr,
564 uint32_t *thread_info_addr_old)
565 {
566 struct cpu_context *context = calloc(1, sizeof(struct cpu_context));
567 uint32_t preempt_count_addr = 0;
568 uint32_t registers[10];
569 uint8_t *buffer = calloc(1, 4);
570 uint32_t stack = base_addr + QAT;
571 uint32_t thread_info_addr = 0;
572 uint32_t thread_info_addr_update = 0;
573 int retval = ERROR_FAIL;
574 context->R4 = 0xdeadbeef;
575 context->R5 = 0xdeadbeef;
576 context->R6 = 0xdeadbeef;
577 context->R7 = 0xdeadbeef;
578 context->R8 = 0xdeadbeef;
579 context->R9 = 0xdeadbeef;
580 context->IP = 0xdeadbeef;
581 context->FP = 0xdeadbeef;
582 context->SP = 0xdeadbeef;
583 context->PC = 0xdeadbeef;
584 retry:
585
586 if (*thread_info_addr_old == 0xdeadbeef) {
587 retval = fill_buffer(target, stack, buffer);
588
589 if (retval == ERROR_OK)
590 thread_info_addr = get_buffer(target, buffer);
591 else
592 LOG_ERROR("cpu_context: unable to read memory");
593
594 thread_info_addr_update = thread_info_addr;
595 } else
596 thread_info_addr = *thread_info_addr_old;
597
598 preempt_count_addr = thread_info_addr + PREEMPT;
599 retval = fill_buffer(target, preempt_count_addr, buffer);
600
601 if (retval == ERROR_OK)
602 context->preempt_count = get_buffer(target, buffer);
603 else {
604 if (*thread_info_addr_old != 0xdeadbeef) {
605 LOG_ERROR
606 ("cpu_context: cannot read at thread_info_addr");
607
608 if (*thread_info_addr_old < LINUX_USER_KERNEL_BORDER)
609 LOG_INFO
610 ("cpu_context : thread_info_addr in userspace!!!");
611
612 *thread_info_addr_old = 0xdeadbeef;
613 goto retry;
614 }
615
616 LOG_ERROR("cpu_context: unable to read memory");
617 }
618
619 thread_info_addr += CPU_CONT;
620
621 retval = linux_read_memory(target, thread_info_addr, 4, 10,
622 (uint8_t *) registers);
623
624 if (retval != ERROR_OK) {
625 free(buffer);
626 LOG_ERROR("cpu_context: unable to read memory\n");
627 return context;
628 }
629
630 context->R4 =
631 target_buffer_get_u32(target, (const uint8_t *)&registers[0]);
632 context->R5 =
633 target_buffer_get_u32(target, (const uint8_t *)&registers[1]);
634 context->R6 =
635 target_buffer_get_u32(target, (const uint8_t *)&registers[2]);
636 context->R7 =
637 target_buffer_get_u32(target, (const uint8_t *)&registers[3]);
638 context->R8 =
639 target_buffer_get_u32(target, (const uint8_t *)&registers[4]);
640 context->R9 =
641 target_buffer_get_u32(target, (const uint8_t *)&registers[5]);
642 context->IP =
643 target_buffer_get_u32(target, (const uint8_t *)&registers[6]);
644 context->FP =
645 target_buffer_get_u32(target, (const uint8_t *)&registers[7]);
646 context->SP =
647 target_buffer_get_u32(target, (const uint8_t *)&registers[8]);
648 context->PC =
649 target_buffer_get_u32(target, (const uint8_t *)&registers[9]);
650
651 if (*thread_info_addr_old == 0xdeadbeef)
652 *thread_info_addr_old = thread_info_addr_update;
653
654 free(buffer);
655
656 return context;
657 }
658
659 uint32_t next_task(struct target *target, struct threads *t)
660 {
661 uint8_t *buffer = calloc(1, 4);
662 uint32_t next_addr = t->base_addr + NEXT;
663 int retval = fill_buffer(target, next_addr, buffer);
664
665 if (retval == ERROR_OK) {
666 uint32_t val = get_buffer(target, buffer);
667 val = val - NEXT;
668 free(buffer);
669 return val;
670 } else
671 LOG_ERROR("next task: unable to read memory");
672
673 free(buffer);
674
675 return 0;
676 }
677
678 struct current_thread *add_current_thread(struct current_thread *currents,
679 struct current_thread *ct)
680 {
681 ct->next = NULL;
682
683 if (currents == NULL) {
684 currents = ct;
685 return currents;
686 } else {
687 struct current_thread *temp = currents;
688
689 while (temp->next != NULL)
690 temp = temp->next;
691
692 temp->next = ct;
693 return currents;
694 }
695 }
696
697 struct threads *liste_del_task(struct threads *task_list, struct threads **t,
698 struct threads *prev)
699 {
700 LOG_INFO("del task %" PRId64, (*t)->threadid);
701 prev->next = (*t)->next;
702
703 if (prev == task_list)
704 task_list = prev;
705
706 /* free content of threads */
707 if ((*t)->context)
708 free((*t)->context);
709
710 free(*t);
711 *t = prev;
712 return task_list;
713 }
714
715 struct threads *liste_add_task(struct threads *task_list, struct threads *t,
716 struct threads **last)
717 {
718 t->next = NULL;
719
720 if (*last == NULL)
721 if (task_list == NULL) {
722 task_list = t;
723 return task_list;
724 } else {
725 struct threads *temp = task_list;
726
727 while (temp->next != NULL)
728 temp = temp->next;
729
730 temp->next = t;
731 *last = t;
732 return task_list;
733 } else {
734 (*last)->next = t;
735 *last = t;
736 return task_list;
737 }
738 }
739
740 #ifdef PID_CHECK
741 static int current_pid(struct linux_os *linux_os, uint32_t pid)
742 #else
743 static int current_base_addr(struct linux_os *linux_os, uint32_t base_addr)
744 #endif
745 {
746 struct current_thread *ct = linux_os->current_threads;
747 #ifdef PID_CHECK
748
749 while ((ct != NULL) && (ct->pid != pid))
750 #else
751 while ((ct != NULL) && (ct->TS != base_addr))
752 #endif
753 ct = ct->next;
754 #ifdef PID_CHECK
755 if ((ct != NULL) && (ct->pid == pid))
756 #else
757 if ((ct != NULL) && (ct->TS == base_addr))
758 #endif
759 return 1;
760
761 return 0;
762 }
763
764 int linux_get_tasks(struct target *target, int context)
765 {
766 int loop = 0;
767 int retval = 0;
768 struct linux_os *linux_os = (struct linux_os *)
769 target->rtos->rtos_specific_params;
770 linux_os->thread_list = NULL;
771 linux_os->thread_count = 0;
772
773 if (linux_os->init_task_addr == 0xdeadbeef) {
774 LOG_INFO("no init symbol\n");
775 return ERROR_FAIL;
776 }
777
778 int64_t start = timeval_ms();
779
780 struct threads *t = calloc(1, sizeof(struct threads));
781 struct threads *last = NULL;
782 t->base_addr = linux_os->init_task_addr;
783 /* retrieve the thread id , currently running in the different smp core */
784 get_current(target, 1);
785
786 while (((t->base_addr != linux_os->init_task_addr) &&
787 (t->base_addr != 0)) || (loop == 0)) {
788 loop++;
789 fill_task(target, t);
790 retval = get_name(target, t);
791
792 if (loop > MAX_THREADS) {
793 free(t);
794 LOG_INFO("more than %d threads !!", MAX_THREADS);
795 return ERROR_FAIL;
796 }
797
798 if (retval != ERROR_OK) {
799 free(t);
800 return ERROR_FAIL;
801 }
802
803 /* check that this thread is not one the current threads already
804 * created */
805 #ifdef PID_CHECK
806
807 if (!current_pid(linux_os, t->pid)) {
808 #else
809 if (!current_base_addr(linux_os, t->base_addr)) {
810 #endif
811 t->threadid = linux_os->threadid_count;
812 t->status = 1;
813 linux_os->threadid_count++;
814
815 linux_os->thread_list =
816 liste_add_task(linux_os->thread_list, t, &last);
817 /* no interest to fill the context if it is a current thread. */
818 linux_os->thread_count++;
819 t->thread_info_addr = 0xdeadbeef;
820
821 if (context)
822 t->context =
823 cpu_context_read(target, t->base_addr,
824 &t->thread_info_addr);
825 } else {
826 /*LOG_INFO("thread %s is a current thread already created",t->name); */
827 free(t);
828 }
829
830 uint32_t base_addr = next_task(target, t);
831 t = calloc(1, sizeof(struct threads));
832 t->base_addr = base_addr;
833 }
834
835 linux_os->threads_lookup = 1;
836 linux_os->threads_needs_update = 0;
837 linux_os->preupdtate_threadid_count = linux_os->threadid_count - 1;
838 /* check that all current threads have been identified */
839
840 LOG_INFO("complete time %" PRId64 ", thread mean %" PRId64 "\n",
841 (timeval_ms() - start),
842 (timeval_ms() - start) / linux_os->threadid_count);
843
844 LOG_INFO("threadid count %d", linux_os->threadid_count);
845 free(t);
846
847 return ERROR_OK;
848 }
849
850 static int clean_threadlist(struct target *target)
851 {
852 struct linux_os *linux_os = (struct linux_os *)
853 target->rtos->rtos_specific_params;
854 struct threads *old, *temp = linux_os->thread_list;
855
856 while (temp != NULL) {
857 old = temp;
858
859 if (temp->context)
860 free(temp->context);
861
862 temp = temp->next;
863 free(old);
864 }
865
866 return ERROR_OK;
867 }
868
869 static int linux_os_clean(struct target *target)
870 {
871 struct linux_os *os_linux = (struct linux_os *)
872 target->rtos->rtos_specific_params;
873 clean_threadlist(target);
874 os_linux->init_task_addr = 0xdeadbeef;
875 os_linux->name = "linux";
876 os_linux->thread_list = NULL;
877 os_linux->thread_count = 0;
878 os_linux->nr_cpus = 0;
879 os_linux->threads_lookup = 0;
880 os_linux->threads_needs_update = 0;
881 os_linux->threadid_count = 1;
882 return ERROR_OK;
883 }
884
885 static int insert_into_threadlist(struct target *target, struct threads *t)
886 {
887 struct linux_os *linux_os = (struct linux_os *)
888 target->rtos->rtos_specific_params;
889 struct threads *temp = linux_os->thread_list;
890 t->threadid = linux_os->threadid_count;
891 linux_os->threadid_count++;
892 t->status = 1;
893 t->next = NULL;
894
895 if (temp == NULL)
896 linux_os->thread_list = t;
897 else {
898 while (temp->next != NULL)
899 temp = temp->next;
900
901 t->next = NULL;
902 temp->next = t;
903 }
904
905 return ERROR_OK;
906 }
907
908 static void linux_identify_current_threads(struct target *target)
909 {
910 struct linux_os *linux_os = (struct linux_os *)
911 target->rtos->rtos_specific_params;
912 struct threads *thread_list = linux_os->thread_list;
913 struct current_thread *ct = linux_os->current_threads;
914 struct threads *t = NULL;
915
916 while ((ct != NULL)) {
917 if (ct->threadid == -1) {
918
919 /* un-identified thread */
920 int found = 0;
921 t = calloc(1, sizeof(struct threads));
922 t->base_addr = ct->TS;
923 #ifdef PID_CHECK
924
925 if (fill_task_pid(target, t) != ERROR_OK) {
926 error_handling:
927 free(t);
928 LOG_ERROR
929 ("linux identify_current_threads: unable to read pid");
930 return;
931 }
932 #endif
933
934 /* search in the list of threads if pid
935 already present */
936 while ((thread_list != NULL) && (found == 0)) {
937 #ifdef PID_CHECK
938 if (thread_list->pid == t->pid) {
939 #else
940 if (thread_list->base_addr == t->base_addr) {
941 #endif
942 free(t);
943 t = thread_list;
944 found = 1;
945 }
946 thread_list = thread_list->next;
947 }
948
949 if (!found) {
950 /* it is a new thread */
951 if (fill_task(target, t) != ERROR_OK)
952 goto error_handling;
953
954 get_name(target, t);
955 insert_into_threadlist(target, t);
956 t->thread_info_addr = 0xdeadbeef;
957 }
958
959 t->status = 3;
960 ct->threadid = t->threadid;
961 #ifdef PID_CHECK
962 ct->pid = t->pid;
963 #endif
964 linux_os->thread_count++;
965 #if 0
966 if (found == 0)
967 LOG_INFO("current thread core %x identified %s",
968 ct->core_id, t->name);
969 else
970 LOG_INFO("current thread core %x, reused %s",
971 ct->core_id, t->name);
972 #endif
973 }
974 #if 0
975 else {
976 struct threads tmp;
977 tmp.base_addr = ct->TS;
978 get_name(target, &tmp);
979 LOG_INFO("current thread core %x , already identified %s !!!",
980 ct->core_id, tmp.name);
981 }
982 #endif
983 ct = ct->next;
984 }
985
986 return;
987 #ifndef PID_CHECK
988 error_handling:
989 free(t);
990 LOG_ERROR("unable to read pid");
991 return;
992
993 #endif
994 }
995
996 static int linux_task_update(struct target *target, int context)
997 {
998 struct linux_os *linux_os = (struct linux_os *)
999 target->rtos->rtos_specific_params;
1000 struct threads *thread_list = linux_os->thread_list;
1001 int retval;
1002 int loop = 0;
1003 linux_os->thread_count = 0;
1004
1005 /*thread_list = thread_list->next; skip init_task*/
1006 while (thread_list != NULL) {
1007 thread_list->status = 0; /*setting all tasks to dead state*/
1008
1009 if (thread_list->context) {
1010 free(thread_list->context);
1011 thread_list->context = NULL;
1012 }
1013
1014 thread_list = thread_list->next;
1015 }
1016
1017 int found = 0;
1018
1019 if (linux_os->init_task_addr == 0xdeadbeef) {
1020 LOG_INFO("no init symbol\n");
1021 return ERROR_FAIL;
1022 }
1023 int64_t start = timeval_ms();
1024 struct threads *t = calloc(1, sizeof(struct threads));
1025 uint32_t previous = 0xdeadbeef;
1026 t->base_addr = linux_os->init_task_addr;
1027 retval = get_current(target, 0);
1028 /*check that all current threads have been identified */
1029 linux_identify_current_threads(target);
1030
1031 while (((t->base_addr != linux_os->init_task_addr) &&
1032 (t->base_addr != previous)) || (loop == 0)) {
1033 /* for avoiding any permanent loop for any reason possibly due to
1034 * target */
1035 loop++;
1036 previous = t->base_addr;
1037 /* read only pid */
1038 #ifdef PID_CHECK
1039 retval = fill_task_pid(target, t);
1040 #endif
1041
1042 if (retval != ERROR_OK) {
1043 free(t);
1044 return ERROR_FAIL;
1045 }
1046
1047 thread_list = linux_os->thread_list;
1048
1049 while (thread_list != NULL) {
1050 #ifdef PID_CHECK
1051 if (t->pid == thread_list->pid) {
1052 #else
1053 if (t->base_addr == thread_list->base_addr) {
1054 #endif
1055 if (!thread_list->status) {
1056 #ifdef PID_CHECK
1057 if (t->base_addr != thread_list->base_addr)
1058 LOG_INFO("thread base_addr has changed !!");
1059 #endif
1060 /* this is not a current thread */
1061 thread_list->base_addr = t->base_addr;
1062 thread_list->status = 1;
1063
1064 /* we don 't update this field any more */
1065
1066 /*thread_list->state = t->state;
1067 thread_list->oncpu = t->oncpu;
1068 thread_list->asid = t->asid;
1069 */
1070 if (context)
1071 thread_list->context =
1072 cpu_context_read(target,
1073 thread_list->
1074 base_addr,
1075 &thread_list->
1076 thread_info_addr);
1077 } else {
1078 /* it is a current thread no need to read context */
1079 }
1080
1081 linux_os->thread_count++;
1082 found = 1;
1083 break;
1084 } else {
1085 found = 0;
1086 thread_list = thread_list->next;
1087 }
1088 }
1089
1090 if (found == 0) {
1091 uint32_t base_addr;
1092 fill_task(target, t);
1093 get_name(target, t);
1094 retval = insert_into_threadlist(target, t);
1095 t->thread_info_addr = 0xdeadbeef;
1096
1097 if (context)
1098 t->context =
1099 cpu_context_read(target, t->base_addr,
1100 &t->thread_info_addr);
1101
1102 base_addr = next_task(target, t);
1103 t = calloc(1, sizeof(struct threads));
1104 t->base_addr = base_addr;
1105 linux_os->thread_count++;
1106 } else
1107 t->base_addr = next_task(target, t);
1108 }
1109
1110 LOG_INFO("update thread done %" PRId64 ", mean%" PRId64 "\n",
1111 (timeval_ms() - start), (timeval_ms() - start) / loop);
1112 free(t);
1113 linux_os->threads_needs_update = 0;
1114 return ERROR_OK;
1115 }
1116
1117 int linux_gdb_thread_packet(struct target *target,
1118 struct connection *connection, char const *packet,
1119 int packet_size)
1120 {
1121 int retval;
1122 struct linux_os *linux_os =
1123 (struct linux_os *)target->rtos->rtos_specific_params;
1124
1125 if (linux_os->init_task_addr == 0xdeadbeef) {
1126 /* it has not been initialized */
1127 LOG_INFO("received thread request without init task address");
1128 gdb_put_packet(connection, "l", 1);
1129 return ERROR_OK;
1130 }
1131
1132 retval = linux_get_tasks(target, 1);
1133
1134 if (retval != ERROR_OK)
1135 return ERROR_TARGET_FAILURE;
1136
1137 char *out_str = calloc(MAX_THREADS * 17 + 10, 1);
1138 char *tmp_str = out_str;
1139 tmp_str += sprintf(tmp_str, "m");
1140 struct threads *temp = linux_os->thread_list;
1141
1142 while (temp != NULL) {
1143 tmp_str += sprintf(tmp_str, "%016" PRIx64, temp->threadid);
1144 temp = temp->next;
1145 if (temp)
1146 tmp_str += sprintf(tmp_str, ",");
1147 }
1148
1149 gdb_put_packet(connection, out_str, strlen(out_str));
1150 free(out_str);
1151 return ERROR_OK;
1152 }
1153
1154 int linux_gdb_thread_update(struct target *target,
1155 struct connection *connection, char const *packet,
1156 int packet_size)
1157 {
1158 int found = 0;
1159 struct linux_os *linux_os = (struct linux_os *)
1160 target->rtos->rtos_specific_params;
1161 struct threads *temp = linux_os->thread_list;
1162
1163 while (temp != NULL) {
1164 if (temp->threadid == linux_os->preupdtate_threadid_count + 1) {
1165 /*LOG_INFO("FOUND");*/
1166 found = 1;
1167 break;
1168 } else
1169 temp = temp->next;
1170 }
1171
1172 if (found == 1) {
1173 /*LOG_INFO("INTO GDB THREAD UPDATE FOUNDING START TASK");*/
1174 char *out_strr = calloc(MAX_THREADS * 17 + 10, 1);
1175 char *tmp_strr = out_strr;
1176 tmp_strr += sprintf(tmp_strr, "m");
1177 /*LOG_INFO("CHAR MALLOC & M DONE");*/
1178 tmp_strr += sprintf(tmp_strr, "%016" PRIx64, temp->threadid);
1179
1180 temp = temp->next;
1181
1182 while (temp != NULL) {
1183 /*LOG_INFO("INTO GDB THREAD UPDATE WHILE");*/
1184 tmp_strr += sprintf(tmp_strr, ",");
1185 tmp_strr +=
1186 sprintf(tmp_strr, "%016" PRIx64, temp->threadid);
1187 temp = temp->next;
1188 }
1189
1190 /*tmp_str[0] = 0;*/
1191 gdb_put_packet(connection, out_strr, strlen(out_strr));
1192 linux_os->preupdtate_threadid_count =
1193 linux_os->threadid_count - 1;
1194 free(out_strr);
1195 } else
1196 gdb_put_packet(connection, "l", 1);
1197
1198 return ERROR_OK;
1199 }
1200
1201 int linux_thread_extra_info(struct target *target,
1202 struct connection *connection, char const *packet,
1203 int packet_size)
1204 {
1205 int64_t threadid = 0;
1206 struct linux_os *linux_os = (struct linux_os *)
1207 target->rtos->rtos_specific_params;
1208 sscanf(packet, "qThreadExtraInfo,%" SCNx64, &threadid);
1209 /*LOG_INFO("lookup extra info for thread %" SCNx64, threadid);*/
1210 struct threads *temp = linux_os->thread_list;
1211
1212 while (temp != NULL) {
1213 if (temp->threadid == threadid) {
1214 char *pid = " PID: ";
1215 char *pid_current = "*PID: ";
1216 char *name = "Name: ";
1217 int str_size = strlen(pid) + strlen(name);
1218 char *tmp_str = calloc(1, str_size + 50);
1219 char *tmp_str_ptr = tmp_str;
1220
1221 /* discriminate current task */
1222 if (temp->status == 3)
1223 tmp_str_ptr += sprintf(tmp_str_ptr, "%s",
1224 pid_current);
1225 else
1226 tmp_str_ptr += sprintf(tmp_str_ptr, "%s", pid);
1227
1228 tmp_str_ptr += sprintf(tmp_str_ptr, "%d, ", (int)temp->pid);
1229 sprintf(tmp_str_ptr, "%s", name);
1230 sprintf(tmp_str_ptr, "%s", temp->name);
1231 char *hex_str = calloc(1, strlen(tmp_str) * 2 + 1);
1232 size_t pkt_len = hexify(hex_str, (const uint8_t *)tmp_str,
1233 strlen(tmp_str), strlen(tmp_str) * 2 + 1);
1234 gdb_put_packet(connection, hex_str, pkt_len);
1235 free(hex_str);
1236 free(tmp_str);
1237 return ERROR_OK;
1238 }
1239
1240 temp = temp->next;
1241 }
1242
1243 LOG_INFO("thread not found");
1244 return ERROR_OK;
1245 }
1246
1247 int linux_gdb_T_packet(struct connection *connection,
1248 struct target *target, char const *packet, int packet_size)
1249 {
1250 int64_t threadid;
1251 struct linux_os *linux_os = (struct linux_os *)
1252 target->rtos->rtos_specific_params;
1253 int retval = ERROR_OK;
1254 sscanf(packet, "T%" SCNx64, &threadid);
1255
1256 if (linux_os->threads_needs_update == 0) {
1257 struct threads *temp = linux_os->thread_list;
1258 struct threads *prev = linux_os->thread_list;
1259
1260 while (temp != NULL) {
1261 if (temp->threadid == threadid) {
1262 if (temp->status != 0) {
1263 gdb_put_packet(connection, "OK", 2);
1264 return ERROR_OK;
1265 } else {
1266 /* delete item in the list */
1267 linux_os->thread_list =
1268 liste_del_task(linux_os->
1269 thread_list, &temp,
1270 prev);
1271 linux_os->thread_count--;
1272 gdb_put_packet(connection, "E01", 3);
1273 return ERROR_OK;
1274 }
1275 }
1276
1277 /* for deletion */
1278 prev = temp;
1279 temp = temp->next;
1280 }
1281
1282 LOG_INFO("gdb requested status on non existing thread");
1283 gdb_put_packet(connection, "E01", 3);
1284 return ERROR_OK;
1285
1286 } else {
1287 retval = linux_task_update(target, 1);
1288 struct threads *temp = linux_os->thread_list;
1289
1290 while (temp != NULL) {
1291 if (temp->threadid == threadid) {
1292 if (temp->status == 1) {
1293 gdb_put_packet(connection, "OK", 2);
1294 return ERROR_OK;
1295 } else {
1296 gdb_put_packet(connection, "E01", 3);
1297 return ERROR_OK;
1298 }
1299 }
1300
1301 temp = temp->next;
1302 }
1303 }
1304
1305 return retval;
1306 }
1307
1308 int linux_gdb_h_packet(struct connection *connection,
1309 struct target *target, char const *packet, int packet_size)
1310 {
1311 struct linux_os *linux_os = (struct linux_os *)
1312 target->rtos->rtos_specific_params;
1313 struct current_thread *ct = linux_os->current_threads;
1314
1315 /* select to display the current thread of the selected target */
1316 while ((ct != NULL) && (ct->core_id != target->coreid))
1317 ct = ct->next;
1318
1319 int64_t current_gdb_thread_rq;
1320
1321 if (linux_os->threads_lookup == 1) {
1322 if ((ct != NULL) && (ct->threadid == -1)) {
1323 ct = linux_os->current_threads;
1324
1325 while ((ct != NULL) && (ct->threadid == -1))
1326 ct = ct->next;
1327 }
1328
1329 if (ct == NULL) {
1330 /* no current thread can be identified
1331 * any way with smp */
1332 LOG_INFO("no current thread identified");
1333 /* attempt to display the name of the 2 threads identified with
1334 * get_current */
1335 struct threads t;
1336 ct = linux_os->current_threads;
1337
1338 while ((ct != NULL) && (ct->threadid == -1)) {
1339 t.base_addr = ct->TS;
1340 get_name(target, &t);
1341 LOG_INFO("name of unidentified thread %s",
1342 t.name);
1343 ct = ct->next;
1344 }
1345
1346 gdb_put_packet(connection, "OK", 2);
1347 return ERROR_OK;
1348 }
1349
1350 if (packet[1] == 'g') {
1351 sscanf(packet, "Hg%16" SCNx64, &current_gdb_thread_rq);
1352
1353 if (current_gdb_thread_rq == 0) {
1354 target->rtos->current_threadid = ct->threadid;
1355 gdb_put_packet(connection, "OK", 2);
1356 } else {
1357 target->rtos->current_threadid =
1358 current_gdb_thread_rq;
1359 gdb_put_packet(connection, "OK", 2);
1360 }
1361 } else if (packet[1] == 'c') {
1362 sscanf(packet, "Hc%16" SCNx64, &current_gdb_thread_rq);
1363
1364 if ((current_gdb_thread_rq == 0) ||
1365 (current_gdb_thread_rq == ct->threadid)) {
1366 target->rtos->current_threadid = ct->threadid;
1367 gdb_put_packet(connection, "OK", 2);
1368 } else
1369 gdb_put_packet(connection, "E01", 3);
1370 }
1371 } else
1372 gdb_put_packet(connection, "OK", 2);
1373
1374 return ERROR_OK;
1375 }
1376
1377 static int linux_thread_packet(struct connection *connection, char const *packet,
1378 int packet_size)
1379 {
1380 int retval = ERROR_OK;
1381 struct current_thread *ct;
1382 struct target *target = get_target_from_connection(connection);
1383 struct linux_os *linux_os = (struct linux_os *)
1384 target->rtos->rtos_specific_params;
1385
1386 switch (packet[0]) {
1387 case 'T': /* Is thread alive?*/
1388
1389 linux_gdb_T_packet(connection, target, packet, packet_size);
1390 break;
1391 case 'H': /* Set current thread */
1392 /* ( 'c' for step and continue, 'g' for all other operations )*/
1393 /*LOG_INFO(" H packet received '%s'", packet);*/
1394 linux_gdb_h_packet(connection, target, packet, packet_size);
1395 break;
1396 case 'q':
1397
1398 if (strncmp(packet, "qSymbol", 7) == 0) {
1399 if (rtos_qsymbol(connection, packet, packet_size) == 1) {
1400 linux_compute_virt2phys(target,
1401 target->rtos->
1402 symbols[INIT_TASK].
1403 address);
1404 }
1405
1406 break;
1407 } else if (strncmp(packet, "qfThreadInfo", 12) == 0) {
1408 if (linux_os->thread_list == NULL) {
1409 retval = linux_gdb_thread_packet(target,
1410 connection,
1411 packet,
1412 packet_size);
1413 break;
1414 } else {
1415 retval = linux_gdb_thread_update(target,
1416 connection,
1417 packet,
1418 packet_size);
1419 break;
1420 }
1421 } else if (strncmp(packet, "qsThreadInfo", 12) == 0) {
1422 gdb_put_packet(connection, "l", 1);
1423 break;
1424 } else if (strncmp(packet, "qThreadExtraInfo,", 17) == 0) {
1425 linux_thread_extra_info(target, connection, packet,
1426 packet_size);
1427 break;
1428 } else {
1429 retval = GDB_THREAD_PACKET_NOT_CONSUMED;
1430 break;
1431 }
1432
1433 case 'Q':
1434 /* previously response was : thread not found
1435 * gdb_put_packet(connection, "E01", 3); */
1436 retval = GDB_THREAD_PACKET_NOT_CONSUMED;
1437 break;
1438 case 'c':
1439 case 's': {
1440 if (linux_os->threads_lookup == 1) {
1441 ct = linux_os->current_threads;
1442
1443 while ((ct != NULL) && (ct->core_id) != target->coreid)
1444 ct = ct->next;
1445
1446 if ((ct != NULL) && (ct->threadid == -1)) {
1447 ct = linux_os->current_threads;
1448
1449 while ((ct != NULL) && (ct->threadid == -1))
1450 ct = ct->next;
1451 }
1452
1453 if ((ct != NULL) && (ct->threadid !=
1454 target->rtos->
1455 current_threadid)
1456 && (target->rtos->current_threadid != -1))
1457 LOG_WARNING("WARNING! current GDB thread do not match" \
1458 "current thread running." \
1459 "Switch thread in GDB to threadid %d",
1460 (int)ct->threadid);
1461
1462 LOG_INFO("threads_needs_update = 1");
1463 linux_os->threads_needs_update = 1;
1464 }
1465 }
1466
1467 /* if a packet handler returned an error, exit input loop */
1468 if (retval != ERROR_OK)
1469 return retval;
1470 }
1471
1472 return retval;
1473 }
1474
1475 static int linux_os_smp_init(struct target *target)
1476 {
1477 struct target_list *head;
1478 /* keep only target->rtos */
1479 struct rtos *rtos = target->rtos;
1480 struct linux_os *os_linux =
1481 (struct linux_os *)rtos->rtos_specific_params;
1482 struct current_thread *ct;
1483 head = target->head;
1484
1485 while (head != (struct target_list *)NULL) {
1486 if (head->target->rtos != rtos) {
1487 struct linux_os *smp_os_linux =
1488 (struct linux_os *)head->target->rtos->
1489 rtos_specific_params;
1490 /* remap smp target on rtos */
1491 free(head->target->rtos);
1492 head->target->rtos = rtos;
1493 /* reuse allocated ct */
1494 ct = smp_os_linux->current_threads;
1495 ct->threadid = -1;
1496 ct->TS = 0xdeadbeef;
1497 ct->core_id = head->target->coreid;
1498 os_linux->current_threads =
1499 add_current_thread(os_linux->current_threads, ct);
1500 os_linux->nr_cpus++;
1501 free(smp_os_linux);
1502 }
1503
1504 head = head->next;
1505 }
1506
1507 return ERROR_OK;
1508 }
1509
1510 static int linux_os_create(struct target *target)
1511 {
1512 struct linux_os *os_linux = calloc(1, sizeof(struct linux_os));
1513 struct current_thread *ct = calloc(1, sizeof(struct current_thread));
1514 LOG_INFO("linux os creation\n");
1515 os_linux->init_task_addr = 0xdeadbeef;
1516 os_linux->name = "linux";
1517 os_linux->thread_list = NULL;
1518 os_linux->thread_count = 0;
1519 target->rtos->current_threadid = -1;
1520 os_linux->nr_cpus = 1;
1521 os_linux->threads_lookup = 0;
1522 os_linux->threads_needs_update = 0;
1523 os_linux->threadid_count = 1;
1524 os_linux->current_threads = NULL;
1525 target->rtos->rtos_specific_params = os_linux;
1526 ct->core_id = target->coreid;
1527 ct->threadid = -1;
1528 ct->TS = 0xdeadbeef;
1529 os_linux->current_threads =
1530 add_current_thread(os_linux->current_threads, ct);
1531 /* overload rtos thread default handler */
1532 target->rtos->gdb_thread_packet = linux_thread_packet;
1533 /* initialize a default virt 2 phys translation */
1534 os_linux->phys_mask = ~0xc0000000;
1535 os_linux->phys_base = 0x0;
1536 return JIM_OK;
1537 }
1538
1539 static char *linux_ps_command(struct target *target)
1540 {
1541 struct linux_os *linux_os = (struct linux_os *)
1542 target->rtos->rtos_specific_params;
1543 int retval = ERROR_OK;
1544 char *display;
1545
1546 if (linux_os->threads_lookup == 0)
1547 retval = linux_get_tasks(target, 1);
1548 else {
1549 if (linux_os->threads_needs_update != 0)
1550 retval = linux_task_update(target, 0);
1551 }
1552
1553 if (retval == ERROR_OK) {
1554 struct threads *temp = linux_os->thread_list;
1555 char *tmp;
1556 LOG_INFO("allocation for %d threads line",
1557 linux_os->thread_count);
1558 display = calloc((linux_os->thread_count + 2) * 80, 1);
1559
1560 if (!display)
1561 goto error;
1562
1563 tmp = display;
1564 tmp += sprintf(tmp, "PID\t\tCPU\t\tASID\t\tNAME\n");
1565 tmp += sprintf(tmp, "---\t\t---\t\t----\t\t----\n");
1566
1567 while (temp != NULL) {
1568 if (temp->status) {
1569 if (temp->context)
1570 tmp +=
1571 sprintf(tmp,
1572 "%" PRId32 "\t\t%" PRId32 "\t\t%" PRIx32 "\t\t%s\n",
1573 temp->pid, temp->oncpu,
1574 temp->asid, temp->name);
1575 else
1576 tmp +=
1577 sprintf(tmp,
1578 "%" PRId32 "\t\t%" PRId32 "\t\t%" PRIx32 "\t\t%s\n",
1579 temp->pid, temp->oncpu,
1580 temp->asid, temp->name);
1581 }
1582
1583 temp = temp->next;
1584 }
1585
1586 return display;
1587 }
1588
1589 error:
1590 display = calloc(40, 1);
1591 sprintf(display, "linux_ps_command failed\n");
1592 return display;
1593 }
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