| 1 | /* Main code for remote server for GDB. |
| 2 | Copyright (C) 1989, 1993-1995, 1997-2000, 2002-2012 Free Software |
| 3 | Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "server.h" |
| 21 | #include "agent.h" |
| 22 | |
| 23 | #if HAVE_UNISTD_H |
| 24 | #include <unistd.h> |
| 25 | #endif |
| 26 | #if HAVE_SIGNAL_H |
| 27 | #include <signal.h> |
| 28 | #endif |
| 29 | #if HAVE_SYS_WAIT_H |
| 30 | #include <sys/wait.h> |
| 31 | #endif |
| 32 | |
| 33 | ptid_t cont_thread; |
| 34 | ptid_t general_thread; |
| 35 | |
| 36 | int server_waiting; |
| 37 | |
| 38 | static int extended_protocol; |
| 39 | static int response_needed; |
| 40 | static int exit_requested; |
| 41 | |
| 42 | /* --once: Exit after the first connection has closed. */ |
| 43 | int run_once; |
| 44 | |
| 45 | int multi_process; |
| 46 | int non_stop; |
| 47 | |
| 48 | /* Whether we should attempt to disable the operating system's address |
| 49 | space randomization feature before starting an inferior. */ |
| 50 | int disable_randomization = 1; |
| 51 | |
| 52 | static char **program_argv, **wrapper_argv; |
| 53 | |
| 54 | /* Enable miscellaneous debugging output. The name is historical - it |
| 55 | was originally used to debug LinuxThreads support. */ |
| 56 | int debug_threads; |
| 57 | |
| 58 | /* Enable debugging of h/w breakpoint/watchpoint support. */ |
| 59 | int debug_hw_points; |
| 60 | |
| 61 | int pass_signals[TARGET_SIGNAL_LAST]; |
| 62 | |
| 63 | jmp_buf toplevel; |
| 64 | |
| 65 | const char *gdbserver_xmltarget; |
| 66 | |
| 67 | /* The PID of the originally created or attached inferior. Used to |
| 68 | send signals to the process when GDB sends us an asynchronous interrupt |
| 69 | (user hitting Control-C in the client), and to wait for the child to exit |
| 70 | when no longer debugging it. */ |
| 71 | |
| 72 | unsigned long signal_pid; |
| 73 | |
| 74 | #ifdef SIGTTOU |
| 75 | /* A file descriptor for the controlling terminal. */ |
| 76 | int terminal_fd; |
| 77 | |
| 78 | /* TERMINAL_FD's original foreground group. */ |
| 79 | pid_t old_foreground_pgrp; |
| 80 | |
| 81 | /* Hand back terminal ownership to the original foreground group. */ |
| 82 | |
| 83 | static void |
| 84 | restore_old_foreground_pgrp (void) |
| 85 | { |
| 86 | tcsetpgrp (terminal_fd, old_foreground_pgrp); |
| 87 | } |
| 88 | #endif |
| 89 | |
| 90 | /* Set if you want to disable optional thread related packets support |
| 91 | in gdbserver, for the sake of testing GDB against stubs that don't |
| 92 | support them. */ |
| 93 | int disable_packet_vCont; |
| 94 | int disable_packet_Tthread; |
| 95 | int disable_packet_qC; |
| 96 | int disable_packet_qfThreadInfo; |
| 97 | |
| 98 | /* Last status reported to GDB. */ |
| 99 | static struct target_waitstatus last_status; |
| 100 | static ptid_t last_ptid; |
| 101 | |
| 102 | static char *own_buf; |
| 103 | static unsigned char *mem_buf; |
| 104 | |
| 105 | /* Structure holding information relative to a single stop reply. We |
| 106 | keep a queue of these (really a singly-linked list) to push to GDB |
| 107 | in non-stop mode. */ |
| 108 | struct vstop_notif |
| 109 | { |
| 110 | /* Pointer to next in list. */ |
| 111 | struct vstop_notif *next; |
| 112 | |
| 113 | /* Thread or process that got the event. */ |
| 114 | ptid_t ptid; |
| 115 | |
| 116 | /* Event info. */ |
| 117 | struct target_waitstatus status; |
| 118 | }; |
| 119 | |
| 120 | /* The pending stop replies list head. */ |
| 121 | static struct vstop_notif *notif_queue = NULL; |
| 122 | |
| 123 | /* Put a stop reply to the stop reply queue. */ |
| 124 | |
| 125 | static void |
| 126 | queue_stop_reply (ptid_t ptid, struct target_waitstatus *status) |
| 127 | { |
| 128 | struct vstop_notif *new_notif; |
| 129 | |
| 130 | new_notif = xmalloc (sizeof (*new_notif)); |
| 131 | new_notif->next = NULL; |
| 132 | new_notif->ptid = ptid; |
| 133 | new_notif->status = *status; |
| 134 | |
| 135 | if (notif_queue) |
| 136 | { |
| 137 | struct vstop_notif *tail; |
| 138 | for (tail = notif_queue; |
| 139 | tail && tail->next; |
| 140 | tail = tail->next) |
| 141 | ; |
| 142 | tail->next = new_notif; |
| 143 | } |
| 144 | else |
| 145 | notif_queue = new_notif; |
| 146 | |
| 147 | if (remote_debug) |
| 148 | { |
| 149 | int i = 0; |
| 150 | struct vstop_notif *n; |
| 151 | |
| 152 | for (n = notif_queue; n; n = n->next) |
| 153 | i++; |
| 154 | |
| 155 | fprintf (stderr, "pending stop replies: %d\n", i); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | /* Place an event in the stop reply queue, and push a notification if |
| 160 | we aren't sending one yet. */ |
| 161 | |
| 162 | void |
| 163 | push_event (ptid_t ptid, struct target_waitstatus *status) |
| 164 | { |
| 165 | gdb_assert (status->kind != TARGET_WAITKIND_IGNORE); |
| 166 | |
| 167 | queue_stop_reply (ptid, status); |
| 168 | |
| 169 | /* If this is the first stop reply in the queue, then inform GDB |
| 170 | about it, by sending a Stop notification. */ |
| 171 | if (notif_queue->next == NULL) |
| 172 | { |
| 173 | char *p = own_buf; |
| 174 | strcpy (p, "Stop:"); |
| 175 | p += strlen (p); |
| 176 | prepare_resume_reply (p, |
| 177 | notif_queue->ptid, ¬if_queue->status); |
| 178 | putpkt_notif (own_buf); |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | /* Get rid of the currently pending stop replies for PID. If PID is |
| 183 | -1, then apply to all processes. */ |
| 184 | |
| 185 | static void |
| 186 | discard_queued_stop_replies (int pid) |
| 187 | { |
| 188 | struct vstop_notif *prev = NULL, *reply, *next; |
| 189 | |
| 190 | for (reply = notif_queue; reply; reply = next) |
| 191 | { |
| 192 | next = reply->next; |
| 193 | |
| 194 | if (pid == -1 |
| 195 | || ptid_get_pid (reply->ptid) == pid) |
| 196 | { |
| 197 | if (reply == notif_queue) |
| 198 | notif_queue = next; |
| 199 | else |
| 200 | prev->next = reply->next; |
| 201 | |
| 202 | free (reply); |
| 203 | } |
| 204 | else |
| 205 | prev = reply; |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | /* If there are more stop replies to push, push one now. */ |
| 210 | |
| 211 | static void |
| 212 | send_next_stop_reply (char *own_buf) |
| 213 | { |
| 214 | if (notif_queue) |
| 215 | prepare_resume_reply (own_buf, |
| 216 | notif_queue->ptid, |
| 217 | ¬if_queue->status); |
| 218 | else |
| 219 | write_ok (own_buf); |
| 220 | } |
| 221 | |
| 222 | static int |
| 223 | target_running (void) |
| 224 | { |
| 225 | return all_threads.head != NULL; |
| 226 | } |
| 227 | |
| 228 | static int |
| 229 | start_inferior (char **argv) |
| 230 | { |
| 231 | char **new_argv = argv; |
| 232 | |
| 233 | if (wrapper_argv != NULL) |
| 234 | { |
| 235 | int i, count = 1; |
| 236 | |
| 237 | for (i = 0; wrapper_argv[i] != NULL; i++) |
| 238 | count++; |
| 239 | for (i = 0; argv[i] != NULL; i++) |
| 240 | count++; |
| 241 | new_argv = alloca (sizeof (char *) * count); |
| 242 | count = 0; |
| 243 | for (i = 0; wrapper_argv[i] != NULL; i++) |
| 244 | new_argv[count++] = wrapper_argv[i]; |
| 245 | for (i = 0; argv[i] != NULL; i++) |
| 246 | new_argv[count++] = argv[i]; |
| 247 | new_argv[count] = NULL; |
| 248 | } |
| 249 | |
| 250 | if (debug_threads) |
| 251 | { |
| 252 | int i; |
| 253 | for (i = 0; new_argv[i]; ++i) |
| 254 | fprintf (stderr, "new_argv[%d] = \"%s\"\n", i, new_argv[i]); |
| 255 | fflush (stderr); |
| 256 | } |
| 257 | |
| 258 | #ifdef SIGTTOU |
| 259 | signal (SIGTTOU, SIG_DFL); |
| 260 | signal (SIGTTIN, SIG_DFL); |
| 261 | #endif |
| 262 | |
| 263 | signal_pid = create_inferior (new_argv[0], new_argv); |
| 264 | |
| 265 | /* FIXME: we don't actually know at this point that the create |
| 266 | actually succeeded. We won't know that until we wait. */ |
| 267 | fprintf (stderr, "Process %s created; pid = %ld\n", argv[0], |
| 268 | signal_pid); |
| 269 | fflush (stderr); |
| 270 | |
| 271 | #ifdef SIGTTOU |
| 272 | signal (SIGTTOU, SIG_IGN); |
| 273 | signal (SIGTTIN, SIG_IGN); |
| 274 | terminal_fd = fileno (stderr); |
| 275 | old_foreground_pgrp = tcgetpgrp (terminal_fd); |
| 276 | tcsetpgrp (terminal_fd, signal_pid); |
| 277 | atexit (restore_old_foreground_pgrp); |
| 278 | #endif |
| 279 | |
| 280 | if (wrapper_argv != NULL) |
| 281 | { |
| 282 | struct thread_resume resume_info; |
| 283 | |
| 284 | resume_info.thread = pid_to_ptid (signal_pid); |
| 285 | resume_info.kind = resume_continue; |
| 286 | resume_info.sig = 0; |
| 287 | |
| 288 | last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0); |
| 289 | |
| 290 | if (last_status.kind != TARGET_WAITKIND_STOPPED) |
| 291 | return signal_pid; |
| 292 | |
| 293 | do |
| 294 | { |
| 295 | (*the_target->resume) (&resume_info, 1); |
| 296 | |
| 297 | last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0); |
| 298 | if (last_status.kind != TARGET_WAITKIND_STOPPED) |
| 299 | return signal_pid; |
| 300 | |
| 301 | current_inferior->last_resume_kind = resume_stop; |
| 302 | current_inferior->last_status = last_status; |
| 303 | } |
| 304 | while (last_status.value.sig != TARGET_SIGNAL_TRAP); |
| 305 | |
| 306 | current_inferior->last_resume_kind = resume_stop; |
| 307 | current_inferior->last_status = last_status; |
| 308 | return signal_pid; |
| 309 | } |
| 310 | |
| 311 | /* Wait till we are at 1st instruction in program, return new pid |
| 312 | (assuming success). */ |
| 313 | last_ptid = mywait (pid_to_ptid (signal_pid), &last_status, 0, 0); |
| 314 | |
| 315 | if (last_status.kind != TARGET_WAITKIND_EXITED |
| 316 | && last_status.kind != TARGET_WAITKIND_SIGNALLED) |
| 317 | { |
| 318 | current_inferior->last_resume_kind = resume_stop; |
| 319 | current_inferior->last_status = last_status; |
| 320 | } |
| 321 | |
| 322 | return signal_pid; |
| 323 | } |
| 324 | |
| 325 | static int |
| 326 | attach_inferior (int pid) |
| 327 | { |
| 328 | /* myattach should return -1 if attaching is unsupported, |
| 329 | 0 if it succeeded, and call error() otherwise. */ |
| 330 | |
| 331 | if (myattach (pid) != 0) |
| 332 | return -1; |
| 333 | |
| 334 | fprintf (stderr, "Attached; pid = %d\n", pid); |
| 335 | fflush (stderr); |
| 336 | |
| 337 | /* FIXME - It may be that we should get the SIGNAL_PID from the |
| 338 | attach function, so that it can be the main thread instead of |
| 339 | whichever we were told to attach to. */ |
| 340 | signal_pid = pid; |
| 341 | |
| 342 | /* Clear this so the backend doesn't get confused, thinking |
| 343 | CONT_THREAD died, and it needs to resume all threads. */ |
| 344 | cont_thread = null_ptid; |
| 345 | |
| 346 | if (!non_stop) |
| 347 | { |
| 348 | last_ptid = mywait (pid_to_ptid (pid), &last_status, 0, 0); |
| 349 | |
| 350 | /* GDB knows to ignore the first SIGSTOP after attaching to a running |
| 351 | process using the "attach" command, but this is different; it's |
| 352 | just using "target remote". Pretend it's just starting up. */ |
| 353 | if (last_status.kind == TARGET_WAITKIND_STOPPED |
| 354 | && last_status.value.sig == TARGET_SIGNAL_STOP) |
| 355 | last_status.value.sig = TARGET_SIGNAL_TRAP; |
| 356 | |
| 357 | current_inferior->last_resume_kind = resume_stop; |
| 358 | current_inferior->last_status = last_status; |
| 359 | } |
| 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | extern int remote_debug; |
| 365 | |
| 366 | /* Decode a qXfer read request. Return 0 if everything looks OK, |
| 367 | or -1 otherwise. */ |
| 368 | |
| 369 | static int |
| 370 | decode_xfer_read (char *buf, CORE_ADDR *ofs, unsigned int *len) |
| 371 | { |
| 372 | /* After the read marker and annex, qXfer looks like a |
| 373 | traditional 'm' packet. */ |
| 374 | decode_m_packet (buf, ofs, len); |
| 375 | |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | static int |
| 380 | decode_xfer (char *buf, char **object, char **rw, char **annex, char **offset) |
| 381 | { |
| 382 | /* Extract and NUL-terminate the object. */ |
| 383 | *object = buf; |
| 384 | while (*buf && *buf != ':') |
| 385 | buf++; |
| 386 | if (*buf == '\0') |
| 387 | return -1; |
| 388 | *buf++ = 0; |
| 389 | |
| 390 | /* Extract and NUL-terminate the read/write action. */ |
| 391 | *rw = buf; |
| 392 | while (*buf && *buf != ':') |
| 393 | buf++; |
| 394 | if (*buf == '\0') |
| 395 | return -1; |
| 396 | *buf++ = 0; |
| 397 | |
| 398 | /* Extract and NUL-terminate the annex. */ |
| 399 | *annex = buf; |
| 400 | while (*buf && *buf != ':') |
| 401 | buf++; |
| 402 | if (*buf == '\0') |
| 403 | return -1; |
| 404 | *buf++ = 0; |
| 405 | |
| 406 | *offset = buf; |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | /* Write the response to a successful qXfer read. Returns the |
| 411 | length of the (binary) data stored in BUF, corresponding |
| 412 | to as much of DATA/LEN as we could fit. IS_MORE controls |
| 413 | the first character of the response. */ |
| 414 | static int |
| 415 | write_qxfer_response (char *buf, const void *data, int len, int is_more) |
| 416 | { |
| 417 | int out_len; |
| 418 | |
| 419 | if (is_more) |
| 420 | buf[0] = 'm'; |
| 421 | else |
| 422 | buf[0] = 'l'; |
| 423 | |
| 424 | return remote_escape_output (data, len, (unsigned char *) buf + 1, &out_len, |
| 425 | PBUFSIZ - 2) + 1; |
| 426 | } |
| 427 | |
| 428 | /* Handle all of the extended 'Q' packets. */ |
| 429 | |
| 430 | static void |
| 431 | handle_general_set (char *own_buf) |
| 432 | { |
| 433 | if (strncmp ("QPassSignals:", own_buf, strlen ("QPassSignals:")) == 0) |
| 434 | { |
| 435 | int numsigs = (int) TARGET_SIGNAL_LAST, i; |
| 436 | const char *p = own_buf + strlen ("QPassSignals:"); |
| 437 | CORE_ADDR cursig; |
| 438 | |
| 439 | p = decode_address_to_semicolon (&cursig, p); |
| 440 | for (i = 0; i < numsigs; i++) |
| 441 | { |
| 442 | if (i == cursig) |
| 443 | { |
| 444 | pass_signals[i] = 1; |
| 445 | if (*p == '\0') |
| 446 | /* Keep looping, to clear the remaining signals. */ |
| 447 | cursig = -1; |
| 448 | else |
| 449 | p = decode_address_to_semicolon (&cursig, p); |
| 450 | } |
| 451 | else |
| 452 | pass_signals[i] = 0; |
| 453 | } |
| 454 | strcpy (own_buf, "OK"); |
| 455 | return; |
| 456 | } |
| 457 | |
| 458 | if (strcmp (own_buf, "QStartNoAckMode") == 0) |
| 459 | { |
| 460 | if (remote_debug) |
| 461 | { |
| 462 | fprintf (stderr, "[noack mode enabled]\n"); |
| 463 | fflush (stderr); |
| 464 | } |
| 465 | |
| 466 | noack_mode = 1; |
| 467 | write_ok (own_buf); |
| 468 | return; |
| 469 | } |
| 470 | |
| 471 | if (strncmp (own_buf, "QNonStop:", 9) == 0) |
| 472 | { |
| 473 | char *mode = own_buf + 9; |
| 474 | int req = -1; |
| 475 | char *req_str; |
| 476 | |
| 477 | if (strcmp (mode, "0") == 0) |
| 478 | req = 0; |
| 479 | else if (strcmp (mode, "1") == 0) |
| 480 | req = 1; |
| 481 | else |
| 482 | { |
| 483 | /* We don't know what this mode is, so complain to |
| 484 | GDB. */ |
| 485 | fprintf (stderr, "Unknown non-stop mode requested: %s\n", |
| 486 | own_buf); |
| 487 | write_enn (own_buf); |
| 488 | return; |
| 489 | } |
| 490 | |
| 491 | req_str = req ? "non-stop" : "all-stop"; |
| 492 | if (start_non_stop (req) != 0) |
| 493 | { |
| 494 | fprintf (stderr, "Setting %s mode failed\n", req_str); |
| 495 | write_enn (own_buf); |
| 496 | return; |
| 497 | } |
| 498 | |
| 499 | non_stop = req; |
| 500 | |
| 501 | if (remote_debug) |
| 502 | fprintf (stderr, "[%s mode enabled]\n", req_str); |
| 503 | |
| 504 | write_ok (own_buf); |
| 505 | return; |
| 506 | } |
| 507 | |
| 508 | if (strncmp ("QDisableRandomization:", own_buf, |
| 509 | strlen ("QDisableRandomization:")) == 0) |
| 510 | { |
| 511 | char *packet = own_buf + strlen ("QDisableRandomization:"); |
| 512 | ULONGEST setting; |
| 513 | |
| 514 | unpack_varlen_hex (packet, &setting); |
| 515 | disable_randomization = setting; |
| 516 | |
| 517 | if (remote_debug) |
| 518 | { |
| 519 | if (disable_randomization) |
| 520 | fprintf (stderr, "[address space randomization disabled]\n"); |
| 521 | else |
| 522 | fprintf (stderr, "[address space randomization enabled]\n"); |
| 523 | } |
| 524 | |
| 525 | write_ok (own_buf); |
| 526 | return; |
| 527 | } |
| 528 | |
| 529 | if (target_supports_tracepoints () |
| 530 | && handle_tracepoint_general_set (own_buf)) |
| 531 | return; |
| 532 | |
| 533 | if (strncmp ("QAgent:", own_buf, strlen ("QAgent:")) == 0) |
| 534 | { |
| 535 | char *mode = own_buf + strlen ("QAgent:"); |
| 536 | int req = 0; |
| 537 | |
| 538 | if (strcmp (mode, "0") == 0) |
| 539 | req = 0; |
| 540 | else if (strcmp (mode, "1") == 0) |
| 541 | req = 1; |
| 542 | else |
| 543 | { |
| 544 | /* We don't know what this value is, so complain to GDB. */ |
| 545 | sprintf (own_buf, "E.Unknown QAgent value"); |
| 546 | return; |
| 547 | } |
| 548 | |
| 549 | /* Update the flag. */ |
| 550 | use_agent = req; |
| 551 | if (remote_debug) |
| 552 | fprintf (stderr, "[%s agent]\n", req ? "Enable" : "Disable"); |
| 553 | write_ok (own_buf); |
| 554 | return; |
| 555 | } |
| 556 | |
| 557 | /* Otherwise we didn't know what packet it was. Say we didn't |
| 558 | understand it. */ |
| 559 | own_buf[0] = 0; |
| 560 | } |
| 561 | |
| 562 | static const char * |
| 563 | get_features_xml (const char *annex) |
| 564 | { |
| 565 | /* gdbserver_xmltarget defines what to return when looking |
| 566 | for the "target.xml" file. Its contents can either be |
| 567 | verbatim XML code (prefixed with a '@') or else the name |
| 568 | of the actual XML file to be used in place of "target.xml". |
| 569 | |
| 570 | This variable is set up from the auto-generated |
| 571 | init_registers_... routine for the current target. */ |
| 572 | |
| 573 | if (gdbserver_xmltarget |
| 574 | && strcmp (annex, "target.xml") == 0) |
| 575 | { |
| 576 | if (*gdbserver_xmltarget == '@') |
| 577 | return gdbserver_xmltarget + 1; |
| 578 | else |
| 579 | annex = gdbserver_xmltarget; |
| 580 | } |
| 581 | |
| 582 | #ifdef USE_XML |
| 583 | { |
| 584 | extern const char *const xml_builtin[][2]; |
| 585 | int i; |
| 586 | |
| 587 | /* Look for the annex. */ |
| 588 | for (i = 0; xml_builtin[i][0] != NULL; i++) |
| 589 | if (strcmp (annex, xml_builtin[i][0]) == 0) |
| 590 | break; |
| 591 | |
| 592 | if (xml_builtin[i][0] != NULL) |
| 593 | return xml_builtin[i][1]; |
| 594 | } |
| 595 | #endif |
| 596 | |
| 597 | return NULL; |
| 598 | } |
| 599 | |
| 600 | void |
| 601 | monitor_show_help (void) |
| 602 | { |
| 603 | monitor_output ("The following monitor commands are supported:\n"); |
| 604 | monitor_output (" set debug <0|1>\n"); |
| 605 | monitor_output (" Enable general debugging messages\n"); |
| 606 | monitor_output (" set debug-hw-points <0|1>\n"); |
| 607 | monitor_output (" Enable h/w breakpoint/watchpoint debugging messages\n"); |
| 608 | monitor_output (" set remote-debug <0|1>\n"); |
| 609 | monitor_output (" Enable remote protocol debugging messages\n"); |
| 610 | monitor_output (" exit\n"); |
| 611 | monitor_output (" Quit GDBserver\n"); |
| 612 | } |
| 613 | |
| 614 | /* Read trace frame or inferior memory. Returns the number of bytes |
| 615 | actually read, zero when no further transfer is possible, and -1 on |
| 616 | error. Return of a positive value smaller than LEN does not |
| 617 | indicate there's no more to be read, only the end of the transfer. |
| 618 | E.g., when GDB reads memory from a traceframe, a first request may |
| 619 | be served from a memory block that does not cover the whole request |
| 620 | length. A following request gets the rest served from either |
| 621 | another block (of the same traceframe) or from the read-only |
| 622 | regions. */ |
| 623 | |
| 624 | static int |
| 625 | gdb_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) |
| 626 | { |
| 627 | int res; |
| 628 | |
| 629 | if (current_traceframe >= 0) |
| 630 | { |
| 631 | ULONGEST nbytes; |
| 632 | ULONGEST length = len; |
| 633 | |
| 634 | if (traceframe_read_mem (current_traceframe, |
| 635 | memaddr, myaddr, len, &nbytes)) |
| 636 | return EIO; |
| 637 | /* Data read from trace buffer, we're done. */ |
| 638 | if (nbytes > 0) |
| 639 | return nbytes; |
| 640 | if (!in_readonly_region (memaddr, length)) |
| 641 | return -1; |
| 642 | /* Otherwise we have a valid readonly case, fall through. */ |
| 643 | /* (assume no half-trace half-real blocks for now) */ |
| 644 | } |
| 645 | |
| 646 | res = prepare_to_access_memory (); |
| 647 | if (res == 0) |
| 648 | { |
| 649 | res = read_inferior_memory (memaddr, myaddr, len); |
| 650 | done_accessing_memory (); |
| 651 | |
| 652 | return res == 0 ? len : -1; |
| 653 | } |
| 654 | else |
| 655 | return -1; |
| 656 | } |
| 657 | |
| 658 | /* Write trace frame or inferior memory. Actually, writing to trace |
| 659 | frames is forbidden. */ |
| 660 | |
| 661 | static int |
| 662 | gdb_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len) |
| 663 | { |
| 664 | if (current_traceframe >= 0) |
| 665 | return EIO; |
| 666 | else |
| 667 | { |
| 668 | int ret; |
| 669 | |
| 670 | ret = prepare_to_access_memory (); |
| 671 | if (ret == 0) |
| 672 | { |
| 673 | ret = write_inferior_memory (memaddr, myaddr, len); |
| 674 | done_accessing_memory (); |
| 675 | } |
| 676 | return ret; |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | /* Subroutine of handle_search_memory to simplify it. */ |
| 681 | |
| 682 | static int |
| 683 | handle_search_memory_1 (CORE_ADDR start_addr, CORE_ADDR search_space_len, |
| 684 | gdb_byte *pattern, unsigned pattern_len, |
| 685 | gdb_byte *search_buf, |
| 686 | unsigned chunk_size, unsigned search_buf_size, |
| 687 | CORE_ADDR *found_addrp) |
| 688 | { |
| 689 | /* Prime the search buffer. */ |
| 690 | |
| 691 | if (gdb_read_memory (start_addr, search_buf, search_buf_size) |
| 692 | != search_buf_size) |
| 693 | { |
| 694 | warning ("Unable to access target memory at 0x%lx, halting search.", |
| 695 | (long) start_addr); |
| 696 | return -1; |
| 697 | } |
| 698 | |
| 699 | /* Perform the search. |
| 700 | |
| 701 | The loop is kept simple by allocating [N + pattern-length - 1] bytes. |
| 702 | When we've scanned N bytes we copy the trailing bytes to the start and |
| 703 | read in another N bytes. */ |
| 704 | |
| 705 | while (search_space_len >= pattern_len) |
| 706 | { |
| 707 | gdb_byte *found_ptr; |
| 708 | unsigned nr_search_bytes = (search_space_len < search_buf_size |
| 709 | ? search_space_len |
| 710 | : search_buf_size); |
| 711 | |
| 712 | found_ptr = memmem (search_buf, nr_search_bytes, pattern, pattern_len); |
| 713 | |
| 714 | if (found_ptr != NULL) |
| 715 | { |
| 716 | CORE_ADDR found_addr = start_addr + (found_ptr - search_buf); |
| 717 | *found_addrp = found_addr; |
| 718 | return 1; |
| 719 | } |
| 720 | |
| 721 | /* Not found in this chunk, skip to next chunk. */ |
| 722 | |
| 723 | /* Don't let search_space_len wrap here, it's unsigned. */ |
| 724 | if (search_space_len >= chunk_size) |
| 725 | search_space_len -= chunk_size; |
| 726 | else |
| 727 | search_space_len = 0; |
| 728 | |
| 729 | if (search_space_len >= pattern_len) |
| 730 | { |
| 731 | unsigned keep_len = search_buf_size - chunk_size; |
| 732 | CORE_ADDR read_addr = start_addr + chunk_size + keep_len; |
| 733 | int nr_to_read; |
| 734 | |
| 735 | /* Copy the trailing part of the previous iteration to the front |
| 736 | of the buffer for the next iteration. */ |
| 737 | memcpy (search_buf, search_buf + chunk_size, keep_len); |
| 738 | |
| 739 | nr_to_read = (search_space_len - keep_len < chunk_size |
| 740 | ? search_space_len - keep_len |
| 741 | : chunk_size); |
| 742 | |
| 743 | if (gdb_read_memory (read_addr, search_buf + keep_len, |
| 744 | nr_to_read) != search_buf_size) |
| 745 | { |
| 746 | warning ("Unable to access target memory " |
| 747 | "at 0x%lx, halting search.", |
| 748 | (long) read_addr); |
| 749 | return -1; |
| 750 | } |
| 751 | |
| 752 | start_addr += chunk_size; |
| 753 | } |
| 754 | } |
| 755 | |
| 756 | /* Not found. */ |
| 757 | |
| 758 | return 0; |
| 759 | } |
| 760 | |
| 761 | /* Handle qSearch:memory packets. */ |
| 762 | |
| 763 | static void |
| 764 | handle_search_memory (char *own_buf, int packet_len) |
| 765 | { |
| 766 | CORE_ADDR start_addr; |
| 767 | CORE_ADDR search_space_len; |
| 768 | gdb_byte *pattern; |
| 769 | unsigned int pattern_len; |
| 770 | /* NOTE: also defined in find.c testcase. */ |
| 771 | #define SEARCH_CHUNK_SIZE 16000 |
| 772 | const unsigned chunk_size = SEARCH_CHUNK_SIZE; |
| 773 | /* Buffer to hold memory contents for searching. */ |
| 774 | gdb_byte *search_buf; |
| 775 | unsigned search_buf_size; |
| 776 | int found; |
| 777 | CORE_ADDR found_addr; |
| 778 | int cmd_name_len = sizeof ("qSearch:memory:") - 1; |
| 779 | |
| 780 | pattern = malloc (packet_len); |
| 781 | if (pattern == NULL) |
| 782 | { |
| 783 | error ("Unable to allocate memory to perform the search"); |
| 784 | strcpy (own_buf, "E00"); |
| 785 | return; |
| 786 | } |
| 787 | if (decode_search_memory_packet (own_buf + cmd_name_len, |
| 788 | packet_len - cmd_name_len, |
| 789 | &start_addr, &search_space_len, |
| 790 | pattern, &pattern_len) < 0) |
| 791 | { |
| 792 | free (pattern); |
| 793 | error ("Error in parsing qSearch:memory packet"); |
| 794 | strcpy (own_buf, "E00"); |
| 795 | return; |
| 796 | } |
| 797 | |
| 798 | search_buf_size = chunk_size + pattern_len - 1; |
| 799 | |
| 800 | /* No point in trying to allocate a buffer larger than the search space. */ |
| 801 | if (search_space_len < search_buf_size) |
| 802 | search_buf_size = search_space_len; |
| 803 | |
| 804 | search_buf = malloc (search_buf_size); |
| 805 | if (search_buf == NULL) |
| 806 | { |
| 807 | free (pattern); |
| 808 | error ("Unable to allocate memory to perform the search"); |
| 809 | strcpy (own_buf, "E00"); |
| 810 | return; |
| 811 | } |
| 812 | |
| 813 | found = handle_search_memory_1 (start_addr, search_space_len, |
| 814 | pattern, pattern_len, |
| 815 | search_buf, chunk_size, search_buf_size, |
| 816 | &found_addr); |
| 817 | |
| 818 | if (found > 0) |
| 819 | sprintf (own_buf, "1,%lx", (long) found_addr); |
| 820 | else if (found == 0) |
| 821 | strcpy (own_buf, "0"); |
| 822 | else |
| 823 | strcpy (own_buf, "E00"); |
| 824 | |
| 825 | free (search_buf); |
| 826 | free (pattern); |
| 827 | } |
| 828 | |
| 829 | #define require_running(BUF) \ |
| 830 | if (!target_running ()) \ |
| 831 | { \ |
| 832 | write_enn (BUF); \ |
| 833 | return; \ |
| 834 | } |
| 835 | |
| 836 | /* Handle monitor commands not handled by target-specific handlers. */ |
| 837 | |
| 838 | static void |
| 839 | handle_monitor_command (char *mon, char *own_buf) |
| 840 | { |
| 841 | if (strcmp (mon, "set debug 1") == 0) |
| 842 | { |
| 843 | debug_threads = 1; |
| 844 | monitor_output ("Debug output enabled.\n"); |
| 845 | } |
| 846 | else if (strcmp (mon, "set debug 0") == 0) |
| 847 | { |
| 848 | debug_threads = 0; |
| 849 | monitor_output ("Debug output disabled.\n"); |
| 850 | } |
| 851 | else if (strcmp (mon, "set debug-hw-points 1") == 0) |
| 852 | { |
| 853 | debug_hw_points = 1; |
| 854 | monitor_output ("H/W point debugging output enabled.\n"); |
| 855 | } |
| 856 | else if (strcmp (mon, "set debug-hw-points 0") == 0) |
| 857 | { |
| 858 | debug_hw_points = 0; |
| 859 | monitor_output ("H/W point debugging output disabled.\n"); |
| 860 | } |
| 861 | else if (strcmp (mon, "set remote-debug 1") == 0) |
| 862 | { |
| 863 | remote_debug = 1; |
| 864 | monitor_output ("Protocol debug output enabled.\n"); |
| 865 | } |
| 866 | else if (strcmp (mon, "set remote-debug 0") == 0) |
| 867 | { |
| 868 | remote_debug = 0; |
| 869 | monitor_output ("Protocol debug output disabled.\n"); |
| 870 | } |
| 871 | else if (strcmp (mon, "help") == 0) |
| 872 | monitor_show_help (); |
| 873 | else if (strcmp (mon, "exit") == 0) |
| 874 | exit_requested = 1; |
| 875 | else |
| 876 | { |
| 877 | monitor_output ("Unknown monitor command.\n\n"); |
| 878 | monitor_show_help (); |
| 879 | write_enn (own_buf); |
| 880 | } |
| 881 | } |
| 882 | |
| 883 | /* Associates a callback with each supported qXfer'able object. */ |
| 884 | |
| 885 | struct qxfer |
| 886 | { |
| 887 | /* The object this handler handles. */ |
| 888 | const char *object; |
| 889 | |
| 890 | /* Request that the target transfer up to LEN 8-bit bytes of the |
| 891 | target's OBJECT. The OFFSET, for a seekable object, specifies |
| 892 | the starting point. The ANNEX can be used to provide additional |
| 893 | data-specific information to the target. |
| 894 | |
| 895 | Return the number of bytes actually transfered, zero when no |
| 896 | further transfer is possible, -1 on error, and -2 when the |
| 897 | transfer is not supported. Return of a positive value smaller |
| 898 | than LEN does not indicate the end of the object, only the end of |
| 899 | the transfer. |
| 900 | |
| 901 | One, and only one, of readbuf or writebuf must be non-NULL. */ |
| 902 | int (*xfer) (const char *annex, |
| 903 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 904 | ULONGEST offset, LONGEST len); |
| 905 | }; |
| 906 | |
| 907 | /* Handle qXfer:auxv:read. */ |
| 908 | |
| 909 | static int |
| 910 | handle_qxfer_auxv (const char *annex, |
| 911 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 912 | ULONGEST offset, LONGEST len) |
| 913 | { |
| 914 | if (the_target->read_auxv == NULL || writebuf != NULL) |
| 915 | return -2; |
| 916 | |
| 917 | if (annex[0] != '\0' || !target_running ()) |
| 918 | return -1; |
| 919 | |
| 920 | return (*the_target->read_auxv) (offset, readbuf, len); |
| 921 | } |
| 922 | |
| 923 | /* Handle qXfer:features:read. */ |
| 924 | |
| 925 | static int |
| 926 | handle_qxfer_features (const char *annex, |
| 927 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 928 | ULONGEST offset, LONGEST len) |
| 929 | { |
| 930 | const char *document; |
| 931 | size_t total_len; |
| 932 | |
| 933 | if (writebuf != NULL) |
| 934 | return -2; |
| 935 | |
| 936 | if (!target_running ()) |
| 937 | return -1; |
| 938 | |
| 939 | /* Grab the correct annex. */ |
| 940 | document = get_features_xml (annex); |
| 941 | if (document == NULL) |
| 942 | return -1; |
| 943 | |
| 944 | total_len = strlen (document); |
| 945 | |
| 946 | if (offset > total_len) |
| 947 | return -1; |
| 948 | |
| 949 | if (offset + len > total_len) |
| 950 | len = total_len - offset; |
| 951 | |
| 952 | memcpy (readbuf, document + offset, len); |
| 953 | return len; |
| 954 | } |
| 955 | |
| 956 | /* Handle qXfer:libraries:read. */ |
| 957 | |
| 958 | static int |
| 959 | handle_qxfer_libraries (const char *annex, |
| 960 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 961 | ULONGEST offset, LONGEST len) |
| 962 | { |
| 963 | unsigned int total_len; |
| 964 | char *document, *p; |
| 965 | struct inferior_list_entry *dll_ptr; |
| 966 | |
| 967 | if (writebuf != NULL) |
| 968 | return -2; |
| 969 | |
| 970 | if (annex[0] != '\0' || !target_running ()) |
| 971 | return -1; |
| 972 | |
| 973 | /* Do not confuse this packet with qXfer:libraries-svr4:read. */ |
| 974 | if (the_target->qxfer_libraries_svr4 != NULL) |
| 975 | return 0; |
| 976 | |
| 977 | /* Over-estimate the necessary memory. Assume that every character |
| 978 | in the library name must be escaped. */ |
| 979 | total_len = 64; |
| 980 | for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next) |
| 981 | total_len += 128 + 6 * strlen (((struct dll_info *) dll_ptr)->name); |
| 982 | |
| 983 | document = malloc (total_len); |
| 984 | if (document == NULL) |
| 985 | return -1; |
| 986 | |
| 987 | strcpy (document, "<library-list>\n"); |
| 988 | p = document + strlen (document); |
| 989 | |
| 990 | for (dll_ptr = all_dlls.head; dll_ptr != NULL; dll_ptr = dll_ptr->next) |
| 991 | { |
| 992 | struct dll_info *dll = (struct dll_info *) dll_ptr; |
| 993 | char *name; |
| 994 | |
| 995 | strcpy (p, " <library name=\""); |
| 996 | p = p + strlen (p); |
| 997 | name = xml_escape_text (dll->name); |
| 998 | strcpy (p, name); |
| 999 | free (name); |
| 1000 | p = p + strlen (p); |
| 1001 | strcpy (p, "\"><segment address=\""); |
| 1002 | p = p + strlen (p); |
| 1003 | sprintf (p, "0x%lx", (long) dll->base_addr); |
| 1004 | p = p + strlen (p); |
| 1005 | strcpy (p, "\"/></library>\n"); |
| 1006 | p = p + strlen (p); |
| 1007 | } |
| 1008 | |
| 1009 | strcpy (p, "</library-list>\n"); |
| 1010 | |
| 1011 | total_len = strlen (document); |
| 1012 | |
| 1013 | if (offset > total_len) |
| 1014 | { |
| 1015 | free (document); |
| 1016 | return -1; |
| 1017 | } |
| 1018 | |
| 1019 | if (offset + len > total_len) |
| 1020 | len = total_len - offset; |
| 1021 | |
| 1022 | memcpy (readbuf, document + offset, len); |
| 1023 | free (document); |
| 1024 | return len; |
| 1025 | } |
| 1026 | |
| 1027 | /* Handle qXfer:libraries-svr4:read. */ |
| 1028 | |
| 1029 | static int |
| 1030 | handle_qxfer_libraries_svr4 (const char *annex, |
| 1031 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 1032 | ULONGEST offset, LONGEST len) |
| 1033 | { |
| 1034 | if (writebuf != NULL) |
| 1035 | return -2; |
| 1036 | |
| 1037 | if (annex[0] != '\0' || !target_running () |
| 1038 | || the_target->qxfer_libraries_svr4 == NULL) |
| 1039 | return -1; |
| 1040 | |
| 1041 | return the_target->qxfer_libraries_svr4 (annex, readbuf, writebuf, offset, len); |
| 1042 | } |
| 1043 | |
| 1044 | /* Handle qXfer:osadata:read. */ |
| 1045 | |
| 1046 | static int |
| 1047 | handle_qxfer_osdata (const char *annex, |
| 1048 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 1049 | ULONGEST offset, LONGEST len) |
| 1050 | { |
| 1051 | if (the_target->qxfer_osdata == NULL || writebuf != NULL) |
| 1052 | return -2; |
| 1053 | |
| 1054 | return (*the_target->qxfer_osdata) (annex, readbuf, NULL, offset, len); |
| 1055 | } |
| 1056 | |
| 1057 | /* Handle qXfer:siginfo:read and qXfer:siginfo:write. */ |
| 1058 | |
| 1059 | static int |
| 1060 | handle_qxfer_siginfo (const char *annex, |
| 1061 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 1062 | ULONGEST offset, LONGEST len) |
| 1063 | { |
| 1064 | if (the_target->qxfer_siginfo == NULL) |
| 1065 | return -2; |
| 1066 | |
| 1067 | if (annex[0] != '\0' || !target_running ()) |
| 1068 | return -1; |
| 1069 | |
| 1070 | return (*the_target->qxfer_siginfo) (annex, readbuf, writebuf, offset, len); |
| 1071 | } |
| 1072 | |
| 1073 | /* Handle qXfer:spu:read and qXfer:spu:write. */ |
| 1074 | |
| 1075 | static int |
| 1076 | handle_qxfer_spu (const char *annex, |
| 1077 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 1078 | ULONGEST offset, LONGEST len) |
| 1079 | { |
| 1080 | if (the_target->qxfer_spu == NULL) |
| 1081 | return -2; |
| 1082 | |
| 1083 | if (!target_running ()) |
| 1084 | return -1; |
| 1085 | |
| 1086 | return (*the_target->qxfer_spu) (annex, readbuf, writebuf, offset, len); |
| 1087 | } |
| 1088 | |
| 1089 | /* Handle qXfer:statictrace:read. */ |
| 1090 | |
| 1091 | static int |
| 1092 | handle_qxfer_statictrace (const char *annex, |
| 1093 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 1094 | ULONGEST offset, LONGEST len) |
| 1095 | { |
| 1096 | ULONGEST nbytes; |
| 1097 | |
| 1098 | if (writebuf != NULL) |
| 1099 | return -2; |
| 1100 | |
| 1101 | if (annex[0] != '\0' || !target_running () || current_traceframe == -1) |
| 1102 | return -1; |
| 1103 | |
| 1104 | if (traceframe_read_sdata (current_traceframe, offset, |
| 1105 | readbuf, len, &nbytes)) |
| 1106 | return -1; |
| 1107 | return nbytes; |
| 1108 | } |
| 1109 | |
| 1110 | /* Helper for handle_qxfer_threads. */ |
| 1111 | |
| 1112 | static void |
| 1113 | handle_qxfer_threads_proper (struct buffer *buffer) |
| 1114 | { |
| 1115 | struct inferior_list_entry *thread; |
| 1116 | |
| 1117 | buffer_grow_str (buffer, "<threads>\n"); |
| 1118 | |
| 1119 | for (thread = all_threads.head; thread; thread = thread->next) |
| 1120 | { |
| 1121 | ptid_t ptid = thread_to_gdb_id ((struct thread_info *)thread); |
| 1122 | char ptid_s[100]; |
| 1123 | int core = -1; |
| 1124 | char core_s[21]; |
| 1125 | |
| 1126 | write_ptid (ptid_s, ptid); |
| 1127 | |
| 1128 | if (the_target->core_of_thread) |
| 1129 | core = (*the_target->core_of_thread) (ptid); |
| 1130 | |
| 1131 | if (core != -1) |
| 1132 | { |
| 1133 | sprintf (core_s, "%d", core); |
| 1134 | buffer_xml_printf (buffer, "<thread id=\"%s\" core=\"%s\"/>\n", |
| 1135 | ptid_s, core_s); |
| 1136 | } |
| 1137 | else |
| 1138 | { |
| 1139 | buffer_xml_printf (buffer, "<thread id=\"%s\"/>\n", |
| 1140 | ptid_s); |
| 1141 | } |
| 1142 | } |
| 1143 | |
| 1144 | buffer_grow_str0 (buffer, "</threads>\n"); |
| 1145 | } |
| 1146 | |
| 1147 | /* Handle qXfer:threads:read. */ |
| 1148 | |
| 1149 | static int |
| 1150 | handle_qxfer_threads (const char *annex, |
| 1151 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 1152 | ULONGEST offset, LONGEST len) |
| 1153 | { |
| 1154 | static char *result = 0; |
| 1155 | static unsigned int result_length = 0; |
| 1156 | |
| 1157 | if (writebuf != NULL) |
| 1158 | return -2; |
| 1159 | |
| 1160 | if (!target_running () || annex[0] != '\0') |
| 1161 | return -1; |
| 1162 | |
| 1163 | if (offset == 0) |
| 1164 | { |
| 1165 | struct buffer buffer; |
| 1166 | /* When asked for data at offset 0, generate everything and store into |
| 1167 | 'result'. Successive reads will be served off 'result'. */ |
| 1168 | if (result) |
| 1169 | free (result); |
| 1170 | |
| 1171 | buffer_init (&buffer); |
| 1172 | |
| 1173 | handle_qxfer_threads_proper (&buffer); |
| 1174 | |
| 1175 | result = buffer_finish (&buffer); |
| 1176 | result_length = strlen (result); |
| 1177 | buffer_free (&buffer); |
| 1178 | } |
| 1179 | |
| 1180 | if (offset >= result_length) |
| 1181 | { |
| 1182 | /* We're out of data. */ |
| 1183 | free (result); |
| 1184 | result = NULL; |
| 1185 | result_length = 0; |
| 1186 | return 0; |
| 1187 | } |
| 1188 | |
| 1189 | if (len > result_length - offset) |
| 1190 | len = result_length - offset; |
| 1191 | |
| 1192 | memcpy (readbuf, result + offset, len); |
| 1193 | |
| 1194 | return len; |
| 1195 | } |
| 1196 | |
| 1197 | /* Handle qXfer:traceframe-info:read. */ |
| 1198 | |
| 1199 | static int |
| 1200 | handle_qxfer_traceframe_info (const char *annex, |
| 1201 | gdb_byte *readbuf, const gdb_byte *writebuf, |
| 1202 | ULONGEST offset, LONGEST len) |
| 1203 | { |
| 1204 | static char *result = 0; |
| 1205 | static unsigned int result_length = 0; |
| 1206 | |
| 1207 | if (writebuf != NULL) |
| 1208 | return -2; |
| 1209 | |
| 1210 | if (!target_running () || annex[0] != '\0' || current_traceframe == -1) |
| 1211 | return -1; |
| 1212 | |
| 1213 | if (offset == 0) |
| 1214 | { |
| 1215 | struct buffer buffer; |
| 1216 | |
| 1217 | /* When asked for data at offset 0, generate everything and |
| 1218 | store into 'result'. Successive reads will be served off |
| 1219 | 'result'. */ |
| 1220 | free (result); |
| 1221 | |
| 1222 | buffer_init (&buffer); |
| 1223 | |
| 1224 | traceframe_read_info (current_traceframe, &buffer); |
| 1225 | |
| 1226 | result = buffer_finish (&buffer); |
| 1227 | result_length = strlen (result); |
| 1228 | buffer_free (&buffer); |
| 1229 | } |
| 1230 | |
| 1231 | if (offset >= result_length) |
| 1232 | { |
| 1233 | /* We're out of data. */ |
| 1234 | free (result); |
| 1235 | result = NULL; |
| 1236 | result_length = 0; |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
| 1240 | if (len > result_length - offset) |
| 1241 | len = result_length - offset; |
| 1242 | |
| 1243 | memcpy (readbuf, result + offset, len); |
| 1244 | return len; |
| 1245 | } |
| 1246 | |
| 1247 | /* Handle qXfer:fdpic:read. */ |
| 1248 | |
| 1249 | static int |
| 1250 | handle_qxfer_fdpic (const char *annex, gdb_byte *readbuf, |
| 1251 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) |
| 1252 | { |
| 1253 | if (the_target->read_loadmap == NULL) |
| 1254 | return -2; |
| 1255 | |
| 1256 | if (!target_running ()) |
| 1257 | return -1; |
| 1258 | |
| 1259 | return (*the_target->read_loadmap) (annex, offset, readbuf, len); |
| 1260 | } |
| 1261 | |
| 1262 | static const struct qxfer qxfer_packets[] = |
| 1263 | { |
| 1264 | { "auxv", handle_qxfer_auxv }, |
| 1265 | { "fdpic", handle_qxfer_fdpic}, |
| 1266 | { "features", handle_qxfer_features }, |
| 1267 | { "libraries", handle_qxfer_libraries }, |
| 1268 | { "libraries-svr4", handle_qxfer_libraries_svr4 }, |
| 1269 | { "osdata", handle_qxfer_osdata }, |
| 1270 | { "siginfo", handle_qxfer_siginfo }, |
| 1271 | { "spu", handle_qxfer_spu }, |
| 1272 | { "statictrace", handle_qxfer_statictrace }, |
| 1273 | { "threads", handle_qxfer_threads }, |
| 1274 | { "traceframe-info", handle_qxfer_traceframe_info }, |
| 1275 | }; |
| 1276 | |
| 1277 | static int |
| 1278 | handle_qxfer (char *own_buf, int packet_len, int *new_packet_len_p) |
| 1279 | { |
| 1280 | int i; |
| 1281 | char *object; |
| 1282 | char *rw; |
| 1283 | char *annex; |
| 1284 | char *offset; |
| 1285 | |
| 1286 | if (strncmp (own_buf, "qXfer:", 6) != 0) |
| 1287 | return 0; |
| 1288 | |
| 1289 | /* Grab the object, r/w and annex. */ |
| 1290 | if (decode_xfer (own_buf + 6, &object, &rw, &annex, &offset) < 0) |
| 1291 | { |
| 1292 | write_enn (own_buf); |
| 1293 | return 1; |
| 1294 | } |
| 1295 | |
| 1296 | for (i = 0; |
| 1297 | i < sizeof (qxfer_packets) / sizeof (qxfer_packets[0]); |
| 1298 | i++) |
| 1299 | { |
| 1300 | const struct qxfer *q = &qxfer_packets[i]; |
| 1301 | |
| 1302 | if (strcmp (object, q->object) == 0) |
| 1303 | { |
| 1304 | if (strcmp (rw, "read") == 0) |
| 1305 | { |
| 1306 | unsigned char *data; |
| 1307 | int n; |
| 1308 | CORE_ADDR ofs; |
| 1309 | unsigned int len; |
| 1310 | |
| 1311 | /* Grab the offset and length. */ |
| 1312 | if (decode_xfer_read (offset, &ofs, &len) < 0) |
| 1313 | { |
| 1314 | write_enn (own_buf); |
| 1315 | return 1; |
| 1316 | } |
| 1317 | |
| 1318 | /* Read one extra byte, as an indicator of whether there is |
| 1319 | more. */ |
| 1320 | if (len > PBUFSIZ - 2) |
| 1321 | len = PBUFSIZ - 2; |
| 1322 | data = malloc (len + 1); |
| 1323 | if (data == NULL) |
| 1324 | { |
| 1325 | write_enn (own_buf); |
| 1326 | return 1; |
| 1327 | } |
| 1328 | n = (*q->xfer) (annex, data, NULL, ofs, len + 1); |
| 1329 | if (n == -2) |
| 1330 | { |
| 1331 | free (data); |
| 1332 | return 0; |
| 1333 | } |
| 1334 | else if (n < 0) |
| 1335 | write_enn (own_buf); |
| 1336 | else if (n > len) |
| 1337 | *new_packet_len_p = write_qxfer_response (own_buf, data, len, 1); |
| 1338 | else |
| 1339 | *new_packet_len_p = write_qxfer_response (own_buf, data, n, 0); |
| 1340 | |
| 1341 | free (data); |
| 1342 | return 1; |
| 1343 | } |
| 1344 | else if (strcmp (rw, "write") == 0) |
| 1345 | { |
| 1346 | int n; |
| 1347 | unsigned int len; |
| 1348 | CORE_ADDR ofs; |
| 1349 | unsigned char *data; |
| 1350 | |
| 1351 | strcpy (own_buf, "E00"); |
| 1352 | data = malloc (packet_len - (offset - own_buf)); |
| 1353 | if (data == NULL) |
| 1354 | { |
| 1355 | write_enn (own_buf); |
| 1356 | return 1; |
| 1357 | } |
| 1358 | if (decode_xfer_write (offset, packet_len - (offset - own_buf), |
| 1359 | &ofs, &len, data) < 0) |
| 1360 | { |
| 1361 | free (data); |
| 1362 | write_enn (own_buf); |
| 1363 | return 1; |
| 1364 | } |
| 1365 | |
| 1366 | n = (*q->xfer) (annex, NULL, data, ofs, len); |
| 1367 | if (n == -2) |
| 1368 | { |
| 1369 | free (data); |
| 1370 | return 0; |
| 1371 | } |
| 1372 | else if (n < 0) |
| 1373 | write_enn (own_buf); |
| 1374 | else |
| 1375 | sprintf (own_buf, "%x", n); |
| 1376 | |
| 1377 | free (data); |
| 1378 | return 1; |
| 1379 | } |
| 1380 | |
| 1381 | return 0; |
| 1382 | } |
| 1383 | } |
| 1384 | |
| 1385 | return 0; |
| 1386 | } |
| 1387 | |
| 1388 | /* Table used by the crc32 function to calcuate the checksum. */ |
| 1389 | |
| 1390 | static unsigned int crc32_table[256] = |
| 1391 | {0, 0}; |
| 1392 | |
| 1393 | /* Compute 32 bit CRC from inferior memory. |
| 1394 | |
| 1395 | On success, return 32 bit CRC. |
| 1396 | On failure, return (unsigned long long) -1. */ |
| 1397 | |
| 1398 | static unsigned long long |
| 1399 | crc32 (CORE_ADDR base, int len, unsigned int crc) |
| 1400 | { |
| 1401 | if (!crc32_table[1]) |
| 1402 | { |
| 1403 | /* Initialize the CRC table and the decoding table. */ |
| 1404 | int i, j; |
| 1405 | unsigned int c; |
| 1406 | |
| 1407 | for (i = 0; i < 256; i++) |
| 1408 | { |
| 1409 | for (c = i << 24, j = 8; j > 0; --j) |
| 1410 | c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1); |
| 1411 | crc32_table[i] = c; |
| 1412 | } |
| 1413 | } |
| 1414 | |
| 1415 | while (len--) |
| 1416 | { |
| 1417 | unsigned char byte = 0; |
| 1418 | |
| 1419 | /* Return failure if memory read fails. */ |
| 1420 | if (read_inferior_memory (base, &byte, 1) != 0) |
| 1421 | return (unsigned long long) -1; |
| 1422 | |
| 1423 | crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ byte) & 255]; |
| 1424 | base++; |
| 1425 | } |
| 1426 | return (unsigned long long) crc; |
| 1427 | } |
| 1428 | |
| 1429 | /* Handle all of the extended 'q' packets. */ |
| 1430 | |
| 1431 | void |
| 1432 | handle_query (char *own_buf, int packet_len, int *new_packet_len_p) |
| 1433 | { |
| 1434 | static struct inferior_list_entry *thread_ptr; |
| 1435 | |
| 1436 | /* Reply the current thread id. */ |
| 1437 | if (strcmp ("qC", own_buf) == 0 && !disable_packet_qC) |
| 1438 | { |
| 1439 | ptid_t gdb_id; |
| 1440 | require_running (own_buf); |
| 1441 | |
| 1442 | if (!ptid_equal (general_thread, null_ptid) |
| 1443 | && !ptid_equal (general_thread, minus_one_ptid)) |
| 1444 | gdb_id = general_thread; |
| 1445 | else |
| 1446 | { |
| 1447 | thread_ptr = all_threads.head; |
| 1448 | gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr); |
| 1449 | } |
| 1450 | |
| 1451 | sprintf (own_buf, "QC"); |
| 1452 | own_buf += 2; |
| 1453 | write_ptid (own_buf, gdb_id); |
| 1454 | return; |
| 1455 | } |
| 1456 | |
| 1457 | if (strcmp ("qSymbol::", own_buf) == 0) |
| 1458 | { |
| 1459 | /* GDB is suggesting new symbols have been loaded. This may |
| 1460 | mean a new shared library has been detected as loaded, so |
| 1461 | take the opportunity to check if breakpoints we think are |
| 1462 | inserted, still are. Note that it isn't guaranteed that |
| 1463 | we'll see this when a shared library is loaded, and nor will |
| 1464 | we see this for unloads (although breakpoints in unloaded |
| 1465 | libraries shouldn't trigger), as GDB may not find symbols for |
| 1466 | the library at all. We also re-validate breakpoints when we |
| 1467 | see a second GDB breakpoint for the same address, and or when |
| 1468 | we access breakpoint shadows. */ |
| 1469 | validate_breakpoints (); |
| 1470 | |
| 1471 | if (target_supports_tracepoints ()) |
| 1472 | tracepoint_look_up_symbols (); |
| 1473 | |
| 1474 | if (target_running () && the_target->look_up_symbols != NULL) |
| 1475 | (*the_target->look_up_symbols) (); |
| 1476 | |
| 1477 | strcpy (own_buf, "OK"); |
| 1478 | return; |
| 1479 | } |
| 1480 | |
| 1481 | if (!disable_packet_qfThreadInfo) |
| 1482 | { |
| 1483 | if (strcmp ("qfThreadInfo", own_buf) == 0) |
| 1484 | { |
| 1485 | ptid_t gdb_id; |
| 1486 | |
| 1487 | require_running (own_buf); |
| 1488 | thread_ptr = all_threads.head; |
| 1489 | |
| 1490 | *own_buf++ = 'm'; |
| 1491 | gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr); |
| 1492 | write_ptid (own_buf, gdb_id); |
| 1493 | thread_ptr = thread_ptr->next; |
| 1494 | return; |
| 1495 | } |
| 1496 | |
| 1497 | if (strcmp ("qsThreadInfo", own_buf) == 0) |
| 1498 | { |
| 1499 | ptid_t gdb_id; |
| 1500 | |
| 1501 | require_running (own_buf); |
| 1502 | if (thread_ptr != NULL) |
| 1503 | { |
| 1504 | *own_buf++ = 'm'; |
| 1505 | gdb_id = thread_to_gdb_id ((struct thread_info *)thread_ptr); |
| 1506 | write_ptid (own_buf, gdb_id); |
| 1507 | thread_ptr = thread_ptr->next; |
| 1508 | return; |
| 1509 | } |
| 1510 | else |
| 1511 | { |
| 1512 | sprintf (own_buf, "l"); |
| 1513 | return; |
| 1514 | } |
| 1515 | } |
| 1516 | } |
| 1517 | |
| 1518 | if (the_target->read_offsets != NULL |
| 1519 | && strcmp ("qOffsets", own_buf) == 0) |
| 1520 | { |
| 1521 | CORE_ADDR text, data; |
| 1522 | |
| 1523 | require_running (own_buf); |
| 1524 | if (the_target->read_offsets (&text, &data)) |
| 1525 | sprintf (own_buf, "Text=%lX;Data=%lX;Bss=%lX", |
| 1526 | (long)text, (long)data, (long)data); |
| 1527 | else |
| 1528 | write_enn (own_buf); |
| 1529 | |
| 1530 | return; |
| 1531 | } |
| 1532 | |
| 1533 | /* Protocol features query. */ |
| 1534 | if (strncmp ("qSupported", own_buf, 10) == 0 |
| 1535 | && (own_buf[10] == ':' || own_buf[10] == '\0')) |
| 1536 | { |
| 1537 | char *p = &own_buf[10]; |
| 1538 | int gdb_supports_qRelocInsn = 0; |
| 1539 | |
| 1540 | /* Start processing qSupported packet. */ |
| 1541 | target_process_qsupported (NULL); |
| 1542 | |
| 1543 | /* Process each feature being provided by GDB. The first |
| 1544 | feature will follow a ':', and latter features will follow |
| 1545 | ';'. */ |
| 1546 | if (*p == ':') |
| 1547 | { |
| 1548 | char **qsupported = NULL; |
| 1549 | int count = 0; |
| 1550 | int i; |
| 1551 | |
| 1552 | /* Two passes, to avoid nested strtok calls in |
| 1553 | target_process_qsupported. */ |
| 1554 | for (p = strtok (p + 1, ";"); |
| 1555 | p != NULL; |
| 1556 | p = strtok (NULL, ";")) |
| 1557 | { |
| 1558 | count++; |
| 1559 | qsupported = xrealloc (qsupported, count * sizeof (char *)); |
| 1560 | qsupported[count - 1] = xstrdup (p); |
| 1561 | } |
| 1562 | |
| 1563 | for (i = 0; i < count; i++) |
| 1564 | { |
| 1565 | p = qsupported[i]; |
| 1566 | if (strcmp (p, "multiprocess+") == 0) |
| 1567 | { |
| 1568 | /* GDB supports and wants multi-process support if |
| 1569 | possible. */ |
| 1570 | if (target_supports_multi_process ()) |
| 1571 | multi_process = 1; |
| 1572 | } |
| 1573 | else if (strcmp (p, "qRelocInsn+") == 0) |
| 1574 | { |
| 1575 | /* GDB supports relocate instruction requests. */ |
| 1576 | gdb_supports_qRelocInsn = 1; |
| 1577 | } |
| 1578 | else |
| 1579 | target_process_qsupported (p); |
| 1580 | |
| 1581 | free (p); |
| 1582 | } |
| 1583 | |
| 1584 | free (qsupported); |
| 1585 | } |
| 1586 | |
| 1587 | sprintf (own_buf, "PacketSize=%x;QPassSignals+", PBUFSIZ - 1); |
| 1588 | |
| 1589 | if (the_target->qxfer_libraries_svr4 != NULL) |
| 1590 | strcat (own_buf, ";qXfer:libraries-svr4:read+"); |
| 1591 | else |
| 1592 | { |
| 1593 | /* We do not have any hook to indicate whether the non-SVR4 target |
| 1594 | backend supports qXfer:libraries:read, so always report it. */ |
| 1595 | strcat (own_buf, ";qXfer:libraries:read+"); |
| 1596 | } |
| 1597 | |
| 1598 | if (the_target->read_auxv != NULL) |
| 1599 | strcat (own_buf, ";qXfer:auxv:read+"); |
| 1600 | |
| 1601 | if (the_target->qxfer_spu != NULL) |
| 1602 | strcat (own_buf, ";qXfer:spu:read+;qXfer:spu:write+"); |
| 1603 | |
| 1604 | if (the_target->qxfer_siginfo != NULL) |
| 1605 | strcat (own_buf, ";qXfer:siginfo:read+;qXfer:siginfo:write+"); |
| 1606 | |
| 1607 | if (the_target->read_loadmap != NULL) |
| 1608 | strcat (own_buf, ";qXfer:fdpic:read+"); |
| 1609 | |
| 1610 | /* We always report qXfer:features:read, as targets may |
| 1611 | install XML files on a subsequent call to arch_setup. |
| 1612 | If we reported to GDB on startup that we don't support |
| 1613 | qXfer:feature:read at all, we will never be re-queried. */ |
| 1614 | strcat (own_buf, ";qXfer:features:read+"); |
| 1615 | |
| 1616 | if (transport_is_reliable) |
| 1617 | strcat (own_buf, ";QStartNoAckMode+"); |
| 1618 | |
| 1619 | if (the_target->qxfer_osdata != NULL) |
| 1620 | strcat (own_buf, ";qXfer:osdata:read+"); |
| 1621 | |
| 1622 | if (target_supports_multi_process ()) |
| 1623 | strcat (own_buf, ";multiprocess+"); |
| 1624 | |
| 1625 | if (target_supports_non_stop ()) |
| 1626 | strcat (own_buf, ";QNonStop+"); |
| 1627 | |
| 1628 | if (target_supports_disable_randomization ()) |
| 1629 | strcat (own_buf, ";QDisableRandomization+"); |
| 1630 | |
| 1631 | strcat (own_buf, ";qXfer:threads:read+"); |
| 1632 | |
| 1633 | if (target_supports_tracepoints ()) |
| 1634 | { |
| 1635 | strcat (own_buf, ";ConditionalTracepoints+"); |
| 1636 | strcat (own_buf, ";TraceStateVariables+"); |
| 1637 | strcat (own_buf, ";TracepointSource+"); |
| 1638 | strcat (own_buf, ";DisconnectedTracing+"); |
| 1639 | if (gdb_supports_qRelocInsn && target_supports_fast_tracepoints ()) |
| 1640 | strcat (own_buf, ";FastTracepoints+"); |
| 1641 | strcat (own_buf, ";StaticTracepoints+"); |
| 1642 | strcat (own_buf, ";InstallInTrace+"); |
| 1643 | strcat (own_buf, ";qXfer:statictrace:read+"); |
| 1644 | strcat (own_buf, ";qXfer:traceframe-info:read+"); |
| 1645 | strcat (own_buf, ";EnableDisableTracepoints+"); |
| 1646 | strcat (own_buf, ";tracenz+"); |
| 1647 | } |
| 1648 | |
| 1649 | /* Support target-side breakpoint conditions. */ |
| 1650 | strcat (own_buf, ";ConditionalBreakpoints+"); |
| 1651 | |
| 1652 | if (target_supports_agent ()) |
| 1653 | strcat (own_buf, ";QAgent+"); |
| 1654 | |
| 1655 | return; |
| 1656 | } |
| 1657 | |
| 1658 | /* Thread-local storage support. */ |
| 1659 | if (the_target->get_tls_address != NULL |
| 1660 | && strncmp ("qGetTLSAddr:", own_buf, 12) == 0) |
| 1661 | { |
| 1662 | char *p = own_buf + 12; |
| 1663 | CORE_ADDR parts[2], address = 0; |
| 1664 | int i, err; |
| 1665 | ptid_t ptid = null_ptid; |
| 1666 | |
| 1667 | require_running (own_buf); |
| 1668 | |
| 1669 | for (i = 0; i < 3; i++) |
| 1670 | { |
| 1671 | char *p2; |
| 1672 | int len; |
| 1673 | |
| 1674 | if (p == NULL) |
| 1675 | break; |
| 1676 | |
| 1677 | p2 = strchr (p, ','); |
| 1678 | if (p2) |
| 1679 | { |
| 1680 | len = p2 - p; |
| 1681 | p2++; |
| 1682 | } |
| 1683 | else |
| 1684 | { |
| 1685 | len = strlen (p); |
| 1686 | p2 = NULL; |
| 1687 | } |
| 1688 | |
| 1689 | if (i == 0) |
| 1690 | ptid = read_ptid (p, NULL); |
| 1691 | else |
| 1692 | decode_address (&parts[i - 1], p, len); |
| 1693 | p = p2; |
| 1694 | } |
| 1695 | |
| 1696 | if (p != NULL || i < 3) |
| 1697 | err = 1; |
| 1698 | else |
| 1699 | { |
| 1700 | struct thread_info *thread = find_thread_ptid (ptid); |
| 1701 | |
| 1702 | if (thread == NULL) |
| 1703 | err = 2; |
| 1704 | else |
| 1705 | err = the_target->get_tls_address (thread, parts[0], parts[1], |
| 1706 | &address); |
| 1707 | } |
| 1708 | |
| 1709 | if (err == 0) |
| 1710 | { |
| 1711 | strcpy (own_buf, paddress(address)); |
| 1712 | return; |
| 1713 | } |
| 1714 | else if (err > 0) |
| 1715 | { |
| 1716 | write_enn (own_buf); |
| 1717 | return; |
| 1718 | } |
| 1719 | |
| 1720 | /* Otherwise, pretend we do not understand this packet. */ |
| 1721 | } |
| 1722 | |
| 1723 | /* Windows OS Thread Information Block address support. */ |
| 1724 | if (the_target->get_tib_address != NULL |
| 1725 | && strncmp ("qGetTIBAddr:", own_buf, 12) == 0) |
| 1726 | { |
| 1727 | char *annex; |
| 1728 | int n; |
| 1729 | CORE_ADDR tlb; |
| 1730 | ptid_t ptid = read_ptid (own_buf + 12, &annex); |
| 1731 | |
| 1732 | n = (*the_target->get_tib_address) (ptid, &tlb); |
| 1733 | if (n == 1) |
| 1734 | { |
| 1735 | strcpy (own_buf, paddress(tlb)); |
| 1736 | return; |
| 1737 | } |
| 1738 | else if (n == 0) |
| 1739 | { |
| 1740 | write_enn (own_buf); |
| 1741 | return; |
| 1742 | } |
| 1743 | return; |
| 1744 | } |
| 1745 | |
| 1746 | /* Handle "monitor" commands. */ |
| 1747 | if (strncmp ("qRcmd,", own_buf, 6) == 0) |
| 1748 | { |
| 1749 | char *mon = malloc (PBUFSIZ); |
| 1750 | int len = strlen (own_buf + 6); |
| 1751 | |
| 1752 | if (mon == NULL) |
| 1753 | { |
| 1754 | write_enn (own_buf); |
| 1755 | return; |
| 1756 | } |
| 1757 | |
| 1758 | if ((len % 2) != 0 || unhexify (mon, own_buf + 6, len / 2) != len / 2) |
| 1759 | { |
| 1760 | write_enn (own_buf); |
| 1761 | free (mon); |
| 1762 | return; |
| 1763 | } |
| 1764 | mon[len / 2] = '\0'; |
| 1765 | |
| 1766 | write_ok (own_buf); |
| 1767 | |
| 1768 | if (the_target->handle_monitor_command == NULL |
| 1769 | || (*the_target->handle_monitor_command) (mon) == 0) |
| 1770 | /* Default processing. */ |
| 1771 | handle_monitor_command (mon, own_buf); |
| 1772 | |
| 1773 | free (mon); |
| 1774 | return; |
| 1775 | } |
| 1776 | |
| 1777 | if (strncmp ("qSearch:memory:", own_buf, |
| 1778 | sizeof ("qSearch:memory:") - 1) == 0) |
| 1779 | { |
| 1780 | require_running (own_buf); |
| 1781 | handle_search_memory (own_buf, packet_len); |
| 1782 | return; |
| 1783 | } |
| 1784 | |
| 1785 | if (strcmp (own_buf, "qAttached") == 0 |
| 1786 | || strncmp (own_buf, "qAttached:", sizeof ("qAttached:") - 1) == 0) |
| 1787 | { |
| 1788 | struct process_info *process; |
| 1789 | |
| 1790 | if (own_buf[sizeof ("qAttached") - 1]) |
| 1791 | { |
| 1792 | int pid = strtoul (own_buf + sizeof ("qAttached:") - 1, NULL, 16); |
| 1793 | process = (struct process_info *) |
| 1794 | find_inferior_id (&all_processes, pid_to_ptid (pid)); |
| 1795 | } |
| 1796 | else |
| 1797 | { |
| 1798 | require_running (own_buf); |
| 1799 | process = current_process (); |
| 1800 | } |
| 1801 | |
| 1802 | if (process == NULL) |
| 1803 | { |
| 1804 | write_enn (own_buf); |
| 1805 | return; |
| 1806 | } |
| 1807 | |
| 1808 | strcpy (own_buf, process->attached ? "1" : "0"); |
| 1809 | return; |
| 1810 | } |
| 1811 | |
| 1812 | if (strncmp ("qCRC:", own_buf, 5) == 0) |
| 1813 | { |
| 1814 | /* CRC check (compare-section). */ |
| 1815 | char *comma; |
| 1816 | CORE_ADDR base; |
| 1817 | int len; |
| 1818 | unsigned long long crc; |
| 1819 | |
| 1820 | require_running (own_buf); |
| 1821 | base = strtoul (own_buf + 5, &comma, 16); |
| 1822 | if (*comma++ != ',') |
| 1823 | { |
| 1824 | write_enn (own_buf); |
| 1825 | return; |
| 1826 | } |
| 1827 | len = strtoul (comma, NULL, 16); |
| 1828 | crc = crc32 (base, len, 0xffffffff); |
| 1829 | /* Check for memory failure. */ |
| 1830 | if (crc == (unsigned long long) -1) |
| 1831 | { |
| 1832 | write_enn (own_buf); |
| 1833 | return; |
| 1834 | } |
| 1835 | sprintf (own_buf, "C%lx", (unsigned long) crc); |
| 1836 | return; |
| 1837 | } |
| 1838 | |
| 1839 | if (handle_qxfer (own_buf, packet_len, new_packet_len_p)) |
| 1840 | return; |
| 1841 | |
| 1842 | if (target_supports_tracepoints () && handle_tracepoint_query (own_buf)) |
| 1843 | return; |
| 1844 | |
| 1845 | /* Otherwise we didn't know what packet it was. Say we didn't |
| 1846 | understand it. */ |
| 1847 | own_buf[0] = 0; |
| 1848 | } |
| 1849 | |
| 1850 | static void gdb_wants_all_threads_stopped (void); |
| 1851 | |
| 1852 | /* Parse vCont packets. */ |
| 1853 | void |
| 1854 | handle_v_cont (char *own_buf) |
| 1855 | { |
| 1856 | char *p, *q; |
| 1857 | int n = 0, i = 0; |
| 1858 | struct thread_resume *resume_info; |
| 1859 | struct thread_resume default_action = {{0}}; |
| 1860 | |
| 1861 | /* Count the number of semicolons in the packet. There should be one |
| 1862 | for every action. */ |
| 1863 | p = &own_buf[5]; |
| 1864 | while (p) |
| 1865 | { |
| 1866 | n++; |
| 1867 | p++; |
| 1868 | p = strchr (p, ';'); |
| 1869 | } |
| 1870 | |
| 1871 | resume_info = malloc (n * sizeof (resume_info[0])); |
| 1872 | if (resume_info == NULL) |
| 1873 | goto err; |
| 1874 | |
| 1875 | p = &own_buf[5]; |
| 1876 | while (*p) |
| 1877 | { |
| 1878 | p++; |
| 1879 | |
| 1880 | if (p[0] == 's' || p[0] == 'S') |
| 1881 | resume_info[i].kind = resume_step; |
| 1882 | else if (p[0] == 'c' || p[0] == 'C') |
| 1883 | resume_info[i].kind = resume_continue; |
| 1884 | else if (p[0] == 't') |
| 1885 | resume_info[i].kind = resume_stop; |
| 1886 | else |
| 1887 | goto err; |
| 1888 | |
| 1889 | if (p[0] == 'S' || p[0] == 'C') |
| 1890 | { |
| 1891 | int sig; |
| 1892 | sig = strtol (p + 1, &q, 16); |
| 1893 | if (p == q) |
| 1894 | goto err; |
| 1895 | p = q; |
| 1896 | |
| 1897 | if (!target_signal_to_host_p (sig)) |
| 1898 | goto err; |
| 1899 | resume_info[i].sig = target_signal_to_host (sig); |
| 1900 | } |
| 1901 | else |
| 1902 | { |
| 1903 | resume_info[i].sig = 0; |
| 1904 | p = p + 1; |
| 1905 | } |
| 1906 | |
| 1907 | if (p[0] == 0) |
| 1908 | { |
| 1909 | resume_info[i].thread = minus_one_ptid; |
| 1910 | default_action = resume_info[i]; |
| 1911 | |
| 1912 | /* Note: we don't increment i here, we'll overwrite this entry |
| 1913 | the next time through. */ |
| 1914 | } |
| 1915 | else if (p[0] == ':') |
| 1916 | { |
| 1917 | ptid_t ptid = read_ptid (p + 1, &q); |
| 1918 | |
| 1919 | if (p == q) |
| 1920 | goto err; |
| 1921 | p = q; |
| 1922 | if (p[0] != ';' && p[0] != 0) |
| 1923 | goto err; |
| 1924 | |
| 1925 | resume_info[i].thread = ptid; |
| 1926 | |
| 1927 | i++; |
| 1928 | } |
| 1929 | } |
| 1930 | |
| 1931 | if (i < n) |
| 1932 | resume_info[i] = default_action; |
| 1933 | |
| 1934 | /* Still used in occasional places in the backend. */ |
| 1935 | if (n == 1 |
| 1936 | && !ptid_equal (resume_info[0].thread, minus_one_ptid) |
| 1937 | && resume_info[0].kind != resume_stop) |
| 1938 | cont_thread = resume_info[0].thread; |
| 1939 | else |
| 1940 | cont_thread = minus_one_ptid; |
| 1941 | set_desired_inferior (0); |
| 1942 | |
| 1943 | if (!non_stop) |
| 1944 | enable_async_io (); |
| 1945 | |
| 1946 | (*the_target->resume) (resume_info, n); |
| 1947 | |
| 1948 | free (resume_info); |
| 1949 | |
| 1950 | if (non_stop) |
| 1951 | write_ok (own_buf); |
| 1952 | else |
| 1953 | { |
| 1954 | last_ptid = mywait (minus_one_ptid, &last_status, 0, 1); |
| 1955 | |
| 1956 | if (last_status.kind != TARGET_WAITKIND_EXITED |
| 1957 | && last_status.kind != TARGET_WAITKIND_SIGNALLED) |
| 1958 | current_inferior->last_status = last_status; |
| 1959 | |
| 1960 | /* From the client's perspective, all-stop mode always stops all |
| 1961 | threads implicitly (and the target backend has already done |
| 1962 | so by now). Tag all threads as "want-stopped", so we don't |
| 1963 | resume them implicitly without the client telling us to. */ |
| 1964 | gdb_wants_all_threads_stopped (); |
| 1965 | prepare_resume_reply (own_buf, last_ptid, &last_status); |
| 1966 | disable_async_io (); |
| 1967 | |
| 1968 | if (last_status.kind == TARGET_WAITKIND_EXITED |
| 1969 | || last_status.kind == TARGET_WAITKIND_SIGNALLED) |
| 1970 | mourn_inferior (find_process_pid (ptid_get_pid (last_ptid))); |
| 1971 | } |
| 1972 | return; |
| 1973 | |
| 1974 | err: |
| 1975 | write_enn (own_buf); |
| 1976 | free (resume_info); |
| 1977 | return; |
| 1978 | } |
| 1979 | |
| 1980 | /* Attach to a new program. Return 1 if successful, 0 if failure. */ |
| 1981 | int |
| 1982 | handle_v_attach (char *own_buf) |
| 1983 | { |
| 1984 | int pid; |
| 1985 | |
| 1986 | pid = strtol (own_buf + 8, NULL, 16); |
| 1987 | if (pid != 0 && attach_inferior (pid) == 0) |
| 1988 | { |
| 1989 | /* Don't report shared library events after attaching, even if |
| 1990 | some libraries are preloaded. GDB will always poll the |
| 1991 | library list. Avoids the "stopped by shared library event" |
| 1992 | notice on the GDB side. */ |
| 1993 | dlls_changed = 0; |
| 1994 | |
| 1995 | if (non_stop) |
| 1996 | { |
| 1997 | /* In non-stop, we don't send a resume reply. Stop events |
| 1998 | will follow up using the normal notification |
| 1999 | mechanism. */ |
| 2000 | write_ok (own_buf); |
| 2001 | } |
| 2002 | else |
| 2003 | prepare_resume_reply (own_buf, last_ptid, &last_status); |
| 2004 | |
| 2005 | return 1; |
| 2006 | } |
| 2007 | else |
| 2008 | { |
| 2009 | write_enn (own_buf); |
| 2010 | return 0; |
| 2011 | } |
| 2012 | } |
| 2013 | |
| 2014 | /* Run a new program. Return 1 if successful, 0 if failure. */ |
| 2015 | static int |
| 2016 | handle_v_run (char *own_buf) |
| 2017 | { |
| 2018 | char *p, *next_p, **new_argv; |
| 2019 | int i, new_argc; |
| 2020 | |
| 2021 | new_argc = 0; |
| 2022 | for (p = own_buf + strlen ("vRun;"); p && *p; p = strchr (p, ';')) |
| 2023 | { |
| 2024 | p++; |
| 2025 | new_argc++; |
| 2026 | } |
| 2027 | |
| 2028 | new_argv = calloc (new_argc + 2, sizeof (char *)); |
| 2029 | if (new_argv == NULL) |
| 2030 | { |
| 2031 | write_enn (own_buf); |
| 2032 | return 0; |
| 2033 | } |
| 2034 | |
| 2035 | i = 0; |
| 2036 | for (p = own_buf + strlen ("vRun;"); *p; p = next_p) |
| 2037 | { |
| 2038 | next_p = strchr (p, ';'); |
| 2039 | if (next_p == NULL) |
| 2040 | next_p = p + strlen (p); |
| 2041 | |
| 2042 | if (i == 0 && p == next_p) |
| 2043 | new_argv[i] = NULL; |
| 2044 | else |
| 2045 | { |
| 2046 | /* FIXME: Fail request if out of memory instead of dying. */ |
| 2047 | new_argv[i] = xmalloc (1 + (next_p - p) / 2); |
| 2048 | unhexify (new_argv[i], p, (next_p - p) / 2); |
| 2049 | new_argv[i][(next_p - p) / 2] = '\0'; |
| 2050 | } |
| 2051 | |
| 2052 | if (*next_p) |
| 2053 | next_p++; |
| 2054 | i++; |
| 2055 | } |
| 2056 | new_argv[i] = NULL; |
| 2057 | |
| 2058 | if (new_argv[0] == NULL) |
| 2059 | { |
| 2060 | /* GDB didn't specify a program to run. Use the program from the |
| 2061 | last run with the new argument list. */ |
| 2062 | |
| 2063 | if (program_argv == NULL) |
| 2064 | { |
| 2065 | write_enn (own_buf); |
| 2066 | freeargv (new_argv); |
| 2067 | return 0; |
| 2068 | } |
| 2069 | |
| 2070 | new_argv[0] = strdup (program_argv[0]); |
| 2071 | if (new_argv[0] == NULL) |
| 2072 | { |
| 2073 | write_enn (own_buf); |
| 2074 | freeargv (new_argv); |
| 2075 | return 0; |
| 2076 | } |
| 2077 | } |
| 2078 | |
| 2079 | /* Free the old argv and install the new one. */ |
| 2080 | freeargv (program_argv); |
| 2081 | program_argv = new_argv; |
| 2082 | |
| 2083 | start_inferior (program_argv); |
| 2084 | if (last_status.kind == TARGET_WAITKIND_STOPPED) |
| 2085 | { |
| 2086 | prepare_resume_reply (own_buf, last_ptid, &last_status); |
| 2087 | |
| 2088 | /* In non-stop, sending a resume reply doesn't set the general |
| 2089 | thread, but GDB assumes a vRun sets it (this is so GDB can |
| 2090 | query which is the main thread of the new inferior. */ |
| 2091 | if (non_stop) |
| 2092 | general_thread = last_ptid; |
| 2093 | |
| 2094 | return 1; |
| 2095 | } |
| 2096 | else |
| 2097 | { |
| 2098 | write_enn (own_buf); |
| 2099 | return 0; |
| 2100 | } |
| 2101 | } |
| 2102 | |
| 2103 | /* Kill process. Return 1 if successful, 0 if failure. */ |
| 2104 | int |
| 2105 | handle_v_kill (char *own_buf) |
| 2106 | { |
| 2107 | int pid; |
| 2108 | char *p = &own_buf[6]; |
| 2109 | if (multi_process) |
| 2110 | pid = strtol (p, NULL, 16); |
| 2111 | else |
| 2112 | pid = signal_pid; |
| 2113 | if (pid != 0 && kill_inferior (pid) == 0) |
| 2114 | { |
| 2115 | last_status.kind = TARGET_WAITKIND_SIGNALLED; |
| 2116 | last_status.value.sig = TARGET_SIGNAL_KILL; |
| 2117 | last_ptid = pid_to_ptid (pid); |
| 2118 | discard_queued_stop_replies (pid); |
| 2119 | write_ok (own_buf); |
| 2120 | return 1; |
| 2121 | } |
| 2122 | else |
| 2123 | { |
| 2124 | write_enn (own_buf); |
| 2125 | return 0; |
| 2126 | } |
| 2127 | } |
| 2128 | |
| 2129 | /* Handle a 'vStopped' packet. */ |
| 2130 | static void |
| 2131 | handle_v_stopped (char *own_buf) |
| 2132 | { |
| 2133 | /* If we're waiting for GDB to acknowledge a pending stop reply, |
| 2134 | consider that done. */ |
| 2135 | if (notif_queue) |
| 2136 | { |
| 2137 | struct vstop_notif *head; |
| 2138 | |
| 2139 | if (remote_debug) |
| 2140 | fprintf (stderr, "vStopped: acking %s\n", |
| 2141 | target_pid_to_str (notif_queue->ptid)); |
| 2142 | |
| 2143 | head = notif_queue; |
| 2144 | notif_queue = notif_queue->next; |
| 2145 | free (head); |
| 2146 | } |
| 2147 | |
| 2148 | /* Push another stop reply, or if there are no more left, an OK. */ |
| 2149 | send_next_stop_reply (own_buf); |
| 2150 | } |
| 2151 | |
| 2152 | /* Handle all of the extended 'v' packets. */ |
| 2153 | void |
| 2154 | handle_v_requests (char *own_buf, int packet_len, int *new_packet_len) |
| 2155 | { |
| 2156 | if (!disable_packet_vCont) |
| 2157 | { |
| 2158 | if (strncmp (own_buf, "vCont;", 6) == 0) |
| 2159 | { |
| 2160 | require_running (own_buf); |
| 2161 | handle_v_cont (own_buf); |
| 2162 | return; |
| 2163 | } |
| 2164 | |
| 2165 | if (strncmp (own_buf, "vCont?", 6) == 0) |
| 2166 | { |
| 2167 | strcpy (own_buf, "vCont;c;C;s;S;t"); |
| 2168 | return; |
| 2169 | } |
| 2170 | } |
| 2171 | |
| 2172 | if (strncmp (own_buf, "vFile:", 6) == 0 |
| 2173 | && handle_vFile (own_buf, packet_len, new_packet_len)) |
| 2174 | return; |
| 2175 | |
| 2176 | if (strncmp (own_buf, "vAttach;", 8) == 0) |
| 2177 | { |
| 2178 | if ((!extended_protocol || !multi_process) && target_running ()) |
| 2179 | { |
| 2180 | fprintf (stderr, "Already debugging a process\n"); |
| 2181 | write_enn (own_buf); |
| 2182 | return; |
| 2183 | } |
| 2184 | handle_v_attach (own_buf); |
| 2185 | return; |
| 2186 | } |
| 2187 | |
| 2188 | if (strncmp (own_buf, "vRun;", 5) == 0) |
| 2189 | { |
| 2190 | if ((!extended_protocol || !multi_process) && target_running ()) |
| 2191 | { |
| 2192 | fprintf (stderr, "Already debugging a process\n"); |
| 2193 | write_enn (own_buf); |
| 2194 | return; |
| 2195 | } |
| 2196 | handle_v_run (own_buf); |
| 2197 | return; |
| 2198 | } |
| 2199 | |
| 2200 | if (strncmp (own_buf, "vKill;", 6) == 0) |
| 2201 | { |
| 2202 | if (!target_running ()) |
| 2203 | { |
| 2204 | fprintf (stderr, "No process to kill\n"); |
| 2205 | write_enn (own_buf); |
| 2206 | return; |
| 2207 | } |
| 2208 | handle_v_kill (own_buf); |
| 2209 | return; |
| 2210 | } |
| 2211 | |
| 2212 | if (strncmp (own_buf, "vStopped", 8) == 0) |
| 2213 | { |
| 2214 | handle_v_stopped (own_buf); |
| 2215 | return; |
| 2216 | } |
| 2217 | |
| 2218 | /* Otherwise we didn't know what packet it was. Say we didn't |
| 2219 | understand it. */ |
| 2220 | own_buf[0] = 0; |
| 2221 | return; |
| 2222 | } |
| 2223 | |
| 2224 | /* Resume inferior and wait for another event. In non-stop mode, |
| 2225 | don't really wait here, but return immediatelly to the event |
| 2226 | loop. */ |
| 2227 | static void |
| 2228 | myresume (char *own_buf, int step, int sig) |
| 2229 | { |
| 2230 | struct thread_resume resume_info[2]; |
| 2231 | int n = 0; |
| 2232 | int valid_cont_thread; |
| 2233 | |
| 2234 | set_desired_inferior (0); |
| 2235 | |
| 2236 | valid_cont_thread = (!ptid_equal (cont_thread, null_ptid) |
| 2237 | && !ptid_equal (cont_thread, minus_one_ptid)); |
| 2238 | |
| 2239 | if (step || sig || valid_cont_thread) |
| 2240 | { |
| 2241 | resume_info[0].thread |
| 2242 | = ((struct inferior_list_entry *) current_inferior)->id; |
| 2243 | if (step) |
| 2244 | resume_info[0].kind = resume_step; |
| 2245 | else |
| 2246 | resume_info[0].kind = resume_continue; |
| 2247 | resume_info[0].sig = sig; |
| 2248 | n++; |
| 2249 | } |
| 2250 | |
| 2251 | if (!valid_cont_thread) |
| 2252 | { |
| 2253 | resume_info[n].thread = minus_one_ptid; |
| 2254 | resume_info[n].kind = resume_continue; |
| 2255 | resume_info[n].sig = 0; |
| 2256 | n++; |
| 2257 | } |
| 2258 | |
| 2259 | if (!non_stop) |
| 2260 | enable_async_io (); |
| 2261 | |
| 2262 | (*the_target->resume) (resume_info, n); |
| 2263 | |
| 2264 | if (non_stop) |
| 2265 | write_ok (own_buf); |
| 2266 | else |
| 2267 | { |
| 2268 | last_ptid = mywait (minus_one_ptid, &last_status, 0, 1); |
| 2269 | |
| 2270 | if (last_status.kind != TARGET_WAITKIND_EXITED |
| 2271 | && last_status.kind != TARGET_WAITKIND_SIGNALLED) |
| 2272 | { |
| 2273 | current_inferior->last_resume_kind = resume_stop; |
| 2274 | current_inferior->last_status = last_status; |
| 2275 | } |
| 2276 | |
| 2277 | prepare_resume_reply (own_buf, last_ptid, &last_status); |
| 2278 | disable_async_io (); |
| 2279 | |
| 2280 | if (last_status.kind == TARGET_WAITKIND_EXITED |
| 2281 | || last_status.kind == TARGET_WAITKIND_SIGNALLED) |
| 2282 | mourn_inferior (find_process_pid (ptid_get_pid (last_ptid))); |
| 2283 | } |
| 2284 | } |
| 2285 | |
| 2286 | /* Callback for for_each_inferior. Make a new stop reply for each |
| 2287 | stopped thread. */ |
| 2288 | |
| 2289 | static int |
| 2290 | queue_stop_reply_callback (struct inferior_list_entry *entry, void *arg) |
| 2291 | { |
| 2292 | struct thread_info *thread = (struct thread_info *) entry; |
| 2293 | |
| 2294 | /* For now, assume targets that don't have this callback also don't |
| 2295 | manage the thread's last_status field. */ |
| 2296 | if (the_target->thread_stopped == NULL) |
| 2297 | { |
| 2298 | /* Pass the last stop reply back to GDB, but don't notify |
| 2299 | yet. */ |
| 2300 | queue_stop_reply (entry->id, &thread->last_status); |
| 2301 | } |
| 2302 | else |
| 2303 | { |
| 2304 | if (thread_stopped (thread)) |
| 2305 | { |
| 2306 | if (debug_threads) |
| 2307 | fprintf (stderr, |
| 2308 | "Reporting thread %s as already stopped with %s\n", |
| 2309 | target_pid_to_str (entry->id), |
| 2310 | target_waitstatus_to_string (&thread->last_status)); |
| 2311 | |
| 2312 | gdb_assert (thread->last_status.kind != TARGET_WAITKIND_IGNORE); |
| 2313 | |
| 2314 | /* Pass the last stop reply back to GDB, but don't notify |
| 2315 | yet. */ |
| 2316 | queue_stop_reply (entry->id, &thread->last_status); |
| 2317 | } |
| 2318 | } |
| 2319 | |
| 2320 | return 0; |
| 2321 | } |
| 2322 | |
| 2323 | /* Set this inferior threads's state as "want-stopped". We won't |
| 2324 | resume this thread until the client gives us another action for |
| 2325 | it. */ |
| 2326 | |
| 2327 | static void |
| 2328 | gdb_wants_thread_stopped (struct inferior_list_entry *entry) |
| 2329 | { |
| 2330 | struct thread_info *thread = (struct thread_info *) entry; |
| 2331 | |
| 2332 | thread->last_resume_kind = resume_stop; |
| 2333 | |
| 2334 | if (thread->last_status.kind == TARGET_WAITKIND_IGNORE) |
| 2335 | { |
| 2336 | /* Most threads are stopped implicitly (all-stop); tag that with |
| 2337 | signal 0. */ |
| 2338 | thread->last_status.kind = TARGET_WAITKIND_STOPPED; |
| 2339 | thread->last_status.value.sig = TARGET_SIGNAL_0; |
| 2340 | } |
| 2341 | } |
| 2342 | |
| 2343 | /* Set all threads' states as "want-stopped". */ |
| 2344 | |
| 2345 | static void |
| 2346 | gdb_wants_all_threads_stopped (void) |
| 2347 | { |
| 2348 | for_each_inferior (&all_threads, gdb_wants_thread_stopped); |
| 2349 | } |
| 2350 | |
| 2351 | /* Clear the gdb_detached flag of every process. */ |
| 2352 | |
| 2353 | static void |
| 2354 | gdb_reattached_process (struct inferior_list_entry *entry) |
| 2355 | { |
| 2356 | struct process_info *process = (struct process_info *) entry; |
| 2357 | |
| 2358 | process->gdb_detached = 0; |
| 2359 | } |
| 2360 | |
| 2361 | /* Status handler for the '?' packet. */ |
| 2362 | |
| 2363 | static void |
| 2364 | handle_status (char *own_buf) |
| 2365 | { |
| 2366 | /* GDB is connected, don't forward events to the target anymore. */ |
| 2367 | for_each_inferior (&all_processes, gdb_reattached_process); |
| 2368 | |
| 2369 | /* In non-stop mode, we must send a stop reply for each stopped |
| 2370 | thread. In all-stop mode, just send one for the first stopped |
| 2371 | thread we find. */ |
| 2372 | |
| 2373 | if (non_stop) |
| 2374 | { |
| 2375 | discard_queued_stop_replies (-1); |
| 2376 | find_inferior (&all_threads, queue_stop_reply_callback, NULL); |
| 2377 | |
| 2378 | /* The first is sent immediatly. OK is sent if there is no |
| 2379 | stopped thread, which is the same handling of the vStopped |
| 2380 | packet (by design). */ |
| 2381 | send_next_stop_reply (own_buf); |
| 2382 | } |
| 2383 | else |
| 2384 | { |
| 2385 | pause_all (0); |
| 2386 | stabilize_threads (); |
| 2387 | gdb_wants_all_threads_stopped (); |
| 2388 | |
| 2389 | if (all_threads.head) |
| 2390 | { |
| 2391 | struct target_waitstatus status; |
| 2392 | |
| 2393 | status.kind = TARGET_WAITKIND_STOPPED; |
| 2394 | status.value.sig = TARGET_SIGNAL_TRAP; |
| 2395 | prepare_resume_reply (own_buf, |
| 2396 | all_threads.head->id, &status); |
| 2397 | } |
| 2398 | else |
| 2399 | strcpy (own_buf, "W00"); |
| 2400 | } |
| 2401 | } |
| 2402 | |
| 2403 | static void |
| 2404 | gdbserver_version (void) |
| 2405 | { |
| 2406 | printf ("GNU gdbserver %s%s\n" |
| 2407 | "Copyright (C) 2012 Free Software Foundation, Inc.\n" |
| 2408 | "gdbserver is free software, covered by the " |
| 2409 | "GNU General Public License.\n" |
| 2410 | "This gdbserver was configured as \"%s\"\n", |
| 2411 | PKGVERSION, version, host_name); |
| 2412 | } |
| 2413 | |
| 2414 | static void |
| 2415 | gdbserver_usage (FILE *stream) |
| 2416 | { |
| 2417 | fprintf (stream, "Usage:\tgdbserver [OPTIONS] COMM PROG [ARGS ...]\n" |
| 2418 | "\tgdbserver [OPTIONS] --attach COMM PID\n" |
| 2419 | "\tgdbserver [OPTIONS] --multi COMM\n" |
| 2420 | "\n" |
| 2421 | "COMM may either be a tty device (for serial debugging), or \n" |
| 2422 | "HOST:PORT to listen for a TCP connection.\n" |
| 2423 | "\n" |
| 2424 | "Options:\n" |
| 2425 | " --debug Enable general debugging output.\n" |
| 2426 | " --remote-debug Enable remote protocol debugging output.\n" |
| 2427 | " --version Display version information and exit.\n" |
| 2428 | " --wrapper WRAPPER -- Run WRAPPER to start new programs.\n" |
| 2429 | " --once Exit after the first connection has " |
| 2430 | "closed.\n"); |
| 2431 | if (REPORT_BUGS_TO[0] && stream == stdout) |
| 2432 | fprintf (stream, "Report bugs to \"%s\".\n", REPORT_BUGS_TO); |
| 2433 | } |
| 2434 | |
| 2435 | static void |
| 2436 | gdbserver_show_disableable (FILE *stream) |
| 2437 | { |
| 2438 | fprintf (stream, "Disableable packets:\n" |
| 2439 | " vCont \tAll vCont packets\n" |
| 2440 | " qC \tQuerying the current thread\n" |
| 2441 | " qfThreadInfo\tThread listing\n" |
| 2442 | " Tthread \tPassing the thread specifier in the " |
| 2443 | "T stop reply packet\n" |
| 2444 | " threads \tAll of the above\n"); |
| 2445 | } |
| 2446 | |
| 2447 | |
| 2448 | #undef require_running |
| 2449 | #define require_running(BUF) \ |
| 2450 | if (!target_running ()) \ |
| 2451 | { \ |
| 2452 | write_enn (BUF); \ |
| 2453 | break; \ |
| 2454 | } |
| 2455 | |
| 2456 | static int |
| 2457 | first_thread_of (struct inferior_list_entry *entry, void *args) |
| 2458 | { |
| 2459 | int pid = * (int *) args; |
| 2460 | |
| 2461 | if (ptid_get_pid (entry->id) == pid) |
| 2462 | return 1; |
| 2463 | |
| 2464 | return 0; |
| 2465 | } |
| 2466 | |
| 2467 | static void |
| 2468 | kill_inferior_callback (struct inferior_list_entry *entry) |
| 2469 | { |
| 2470 | struct process_info *process = (struct process_info *) entry; |
| 2471 | int pid = ptid_get_pid (process->head.id); |
| 2472 | |
| 2473 | kill_inferior (pid); |
| 2474 | discard_queued_stop_replies (pid); |
| 2475 | } |
| 2476 | |
| 2477 | /* Callback for for_each_inferior to detach or kill the inferior, |
| 2478 | depending on whether we attached to it or not. |
| 2479 | We inform the user whether we're detaching or killing the process |
| 2480 | as this is only called when gdbserver is about to exit. */ |
| 2481 | |
| 2482 | static void |
| 2483 | detach_or_kill_inferior_callback (struct inferior_list_entry *entry) |
| 2484 | { |
| 2485 | struct process_info *process = (struct process_info *) entry; |
| 2486 | int pid = ptid_get_pid (process->head.id); |
| 2487 | |
| 2488 | if (process->attached) |
| 2489 | detach_inferior (pid); |
| 2490 | else |
| 2491 | kill_inferior (pid); |
| 2492 | |
| 2493 | discard_queued_stop_replies (pid); |
| 2494 | } |
| 2495 | |
| 2496 | /* for_each_inferior callback for detach_or_kill_for_exit to print |
| 2497 | the pids of started inferiors. */ |
| 2498 | |
| 2499 | static void |
| 2500 | print_started_pid (struct inferior_list_entry *entry) |
| 2501 | { |
| 2502 | struct process_info *process = (struct process_info *) entry; |
| 2503 | |
| 2504 | if (! process->attached) |
| 2505 | { |
| 2506 | int pid = ptid_get_pid (process->head.id); |
| 2507 | fprintf (stderr, " %d", pid); |
| 2508 | } |
| 2509 | } |
| 2510 | |
| 2511 | /* for_each_inferior callback for detach_or_kill_for_exit to print |
| 2512 | the pids of attached inferiors. */ |
| 2513 | |
| 2514 | static void |
| 2515 | print_attached_pid (struct inferior_list_entry *entry) |
| 2516 | { |
| 2517 | struct process_info *process = (struct process_info *) entry; |
| 2518 | |
| 2519 | if (process->attached) |
| 2520 | { |
| 2521 | int pid = ptid_get_pid (process->head.id); |
| 2522 | fprintf (stderr, " %d", pid); |
| 2523 | } |
| 2524 | } |
| 2525 | |
| 2526 | /* Call this when exiting gdbserver with possible inferiors that need |
| 2527 | to be killed or detached from. */ |
| 2528 | |
| 2529 | static void |
| 2530 | detach_or_kill_for_exit (void) |
| 2531 | { |
| 2532 | /* First print a list of the inferiors we will be killing/detaching. |
| 2533 | This is to assist the user, for example, in case the inferior unexpectedly |
| 2534 | dies after we exit: did we screw up or did the inferior exit on its own? |
| 2535 | Having this info will save some head-scratching. */ |
| 2536 | |
| 2537 | if (have_started_inferiors_p ()) |
| 2538 | { |
| 2539 | fprintf (stderr, "Killing process(es):"); |
| 2540 | for_each_inferior (&all_processes, print_started_pid); |
| 2541 | fprintf (stderr, "\n"); |
| 2542 | } |
| 2543 | if (have_attached_inferiors_p ()) |
| 2544 | { |
| 2545 | fprintf (stderr, "Detaching process(es):"); |
| 2546 | for_each_inferior (&all_processes, print_attached_pid); |
| 2547 | fprintf (stderr, "\n"); |
| 2548 | } |
| 2549 | |
| 2550 | /* Now we can kill or detach the inferiors. */ |
| 2551 | |
| 2552 | for_each_inferior (&all_processes, detach_or_kill_inferior_callback); |
| 2553 | } |
| 2554 | |
| 2555 | int |
| 2556 | main (int argc, char *argv[]) |
| 2557 | { |
| 2558 | int bad_attach; |
| 2559 | int pid; |
| 2560 | char *arg_end, *port; |
| 2561 | char **next_arg = &argv[1]; |
| 2562 | int multi_mode = 0; |
| 2563 | int attach = 0; |
| 2564 | int was_running; |
| 2565 | |
| 2566 | while (*next_arg != NULL && **next_arg == '-') |
| 2567 | { |
| 2568 | if (strcmp (*next_arg, "--version") == 0) |
| 2569 | { |
| 2570 | gdbserver_version (); |
| 2571 | exit (0); |
| 2572 | } |
| 2573 | else if (strcmp (*next_arg, "--help") == 0) |
| 2574 | { |
| 2575 | gdbserver_usage (stdout); |
| 2576 | exit (0); |
| 2577 | } |
| 2578 | else if (strcmp (*next_arg, "--attach") == 0) |
| 2579 | attach = 1; |
| 2580 | else if (strcmp (*next_arg, "--multi") == 0) |
| 2581 | multi_mode = 1; |
| 2582 | else if (strcmp (*next_arg, "--wrapper") == 0) |
| 2583 | { |
| 2584 | next_arg++; |
| 2585 | |
| 2586 | wrapper_argv = next_arg; |
| 2587 | while (*next_arg != NULL && strcmp (*next_arg, "--") != 0) |
| 2588 | next_arg++; |
| 2589 | |
| 2590 | if (next_arg == wrapper_argv || *next_arg == NULL) |
| 2591 | { |
| 2592 | gdbserver_usage (stderr); |
| 2593 | exit (1); |
| 2594 | } |
| 2595 | |
| 2596 | /* Consume the "--". */ |
| 2597 | *next_arg = NULL; |
| 2598 | } |
| 2599 | else if (strcmp (*next_arg, "--debug") == 0) |
| 2600 | debug_threads = 1; |
| 2601 | else if (strcmp (*next_arg, "--remote-debug") == 0) |
| 2602 | remote_debug = 1; |
| 2603 | else if (strcmp (*next_arg, "--disable-packet") == 0) |
| 2604 | { |
| 2605 | gdbserver_show_disableable (stdout); |
| 2606 | exit (0); |
| 2607 | } |
| 2608 | else if (strncmp (*next_arg, |
| 2609 | "--disable-packet=", |
| 2610 | sizeof ("--disable-packet=") - 1) == 0) |
| 2611 | { |
| 2612 | char *packets, *tok; |
| 2613 | |
| 2614 | packets = *next_arg += sizeof ("--disable-packet=") - 1; |
| 2615 | for (tok = strtok (packets, ","); |
| 2616 | tok != NULL; |
| 2617 | tok = strtok (NULL, ",")) |
| 2618 | { |
| 2619 | if (strcmp ("vCont", tok) == 0) |
| 2620 | disable_packet_vCont = 1; |
| 2621 | else if (strcmp ("Tthread", tok) == 0) |
| 2622 | disable_packet_Tthread = 1; |
| 2623 | else if (strcmp ("qC", tok) == 0) |
| 2624 | disable_packet_qC = 1; |
| 2625 | else if (strcmp ("qfThreadInfo", tok) == 0) |
| 2626 | disable_packet_qfThreadInfo = 1; |
| 2627 | else if (strcmp ("threads", tok) == 0) |
| 2628 | { |
| 2629 | disable_packet_vCont = 1; |
| 2630 | disable_packet_Tthread = 1; |
| 2631 | disable_packet_qC = 1; |
| 2632 | disable_packet_qfThreadInfo = 1; |
| 2633 | } |
| 2634 | else |
| 2635 | { |
| 2636 | fprintf (stderr, "Don't know how to disable \"%s\".\n\n", |
| 2637 | tok); |
| 2638 | gdbserver_show_disableable (stderr); |
| 2639 | exit (1); |
| 2640 | } |
| 2641 | } |
| 2642 | } |
| 2643 | else if (strcmp (*next_arg, "-") == 0) |
| 2644 | { |
| 2645 | /* "-" specifies a stdio connection and is a form of port |
| 2646 | specification. */ |
| 2647 | *next_arg = STDIO_CONNECTION_NAME; |
| 2648 | break; |
| 2649 | } |
| 2650 | else if (strcmp (*next_arg, "--disable-randomization") == 0) |
| 2651 | disable_randomization = 1; |
| 2652 | else if (strcmp (*next_arg, "--no-disable-randomization") == 0) |
| 2653 | disable_randomization = 0; |
| 2654 | else if (strcmp (*next_arg, "--once") == 0) |
| 2655 | run_once = 1; |
| 2656 | else |
| 2657 | { |
| 2658 | fprintf (stderr, "Unknown argument: %s\n", *next_arg); |
| 2659 | exit (1); |
| 2660 | } |
| 2661 | |
| 2662 | next_arg++; |
| 2663 | continue; |
| 2664 | } |
| 2665 | |
| 2666 | if (setjmp (toplevel)) |
| 2667 | { |
| 2668 | fprintf (stderr, "Exiting\n"); |
| 2669 | exit (1); |
| 2670 | } |
| 2671 | |
| 2672 | port = *next_arg; |
| 2673 | next_arg++; |
| 2674 | if (port == NULL || (!attach && !multi_mode && *next_arg == NULL)) |
| 2675 | { |
| 2676 | gdbserver_usage (stderr); |
| 2677 | exit (1); |
| 2678 | } |
| 2679 | |
| 2680 | /* We need to know whether the remote connection is stdio before |
| 2681 | starting the inferior. Inferiors created in this scenario have |
| 2682 | stdin,stdout redirected. So do this here before we call |
| 2683 | start_inferior. */ |
| 2684 | remote_prepare (port); |
| 2685 | |
| 2686 | bad_attach = 0; |
| 2687 | pid = 0; |
| 2688 | |
| 2689 | /* --attach used to come after PORT, so allow it there for |
| 2690 | compatibility. */ |
| 2691 | if (*next_arg != NULL && strcmp (*next_arg, "--attach") == 0) |
| 2692 | { |
| 2693 | attach = 1; |
| 2694 | next_arg++; |
| 2695 | } |
| 2696 | |
| 2697 | if (attach |
| 2698 | && (*next_arg == NULL |
| 2699 | || (*next_arg)[0] == '\0' |
| 2700 | || (pid = strtoul (*next_arg, &arg_end, 0)) == 0 |
| 2701 | || *arg_end != '\0' |
| 2702 | || next_arg[1] != NULL)) |
| 2703 | bad_attach = 1; |
| 2704 | |
| 2705 | if (bad_attach) |
| 2706 | { |
| 2707 | gdbserver_usage (stderr); |
| 2708 | exit (1); |
| 2709 | } |
| 2710 | |
| 2711 | initialize_async_io (); |
| 2712 | initialize_low (); |
| 2713 | if (target_supports_tracepoints ()) |
| 2714 | initialize_tracepoint (); |
| 2715 | |
| 2716 | own_buf = xmalloc (PBUFSIZ + 1); |
| 2717 | mem_buf = xmalloc (PBUFSIZ); |
| 2718 | |
| 2719 | if (pid == 0 && *next_arg != NULL) |
| 2720 | { |
| 2721 | int i, n; |
| 2722 | |
| 2723 | n = argc - (next_arg - argv); |
| 2724 | program_argv = xmalloc (sizeof (char *) * (n + 1)); |
| 2725 | for (i = 0; i < n; i++) |
| 2726 | program_argv[i] = xstrdup (next_arg[i]); |
| 2727 | program_argv[i] = NULL; |
| 2728 | |
| 2729 | /* Wait till we are at first instruction in program. */ |
| 2730 | start_inferior (program_argv); |
| 2731 | |
| 2732 | /* We are now (hopefully) stopped at the first instruction of |
| 2733 | the target process. This assumes that the target process was |
| 2734 | successfully created. */ |
| 2735 | } |
| 2736 | else if (pid != 0) |
| 2737 | { |
| 2738 | if (attach_inferior (pid) == -1) |
| 2739 | error ("Attaching not supported on this target"); |
| 2740 | |
| 2741 | /* Otherwise succeeded. */ |
| 2742 | } |
| 2743 | else |
| 2744 | { |
| 2745 | last_status.kind = TARGET_WAITKIND_EXITED; |
| 2746 | last_status.value.integer = 0; |
| 2747 | last_ptid = minus_one_ptid; |
| 2748 | } |
| 2749 | |
| 2750 | /* Don't report shared library events on the initial connection, |
| 2751 | even if some libraries are preloaded. Avoids the "stopped by |
| 2752 | shared library event" notice on gdb side. */ |
| 2753 | dlls_changed = 0; |
| 2754 | |
| 2755 | if (setjmp (toplevel)) |
| 2756 | { |
| 2757 | /* If something fails and longjmps while detaching or killing |
| 2758 | inferiors, we'd end up here again, stuck in an infinite loop |
| 2759 | trap. Be sure that if that happens, we exit immediately |
| 2760 | instead. */ |
| 2761 | if (setjmp (toplevel) == 0) |
| 2762 | detach_or_kill_for_exit (); |
| 2763 | else |
| 2764 | fprintf (stderr, "Detach or kill failed. Exiting\n"); |
| 2765 | exit (1); |
| 2766 | } |
| 2767 | |
| 2768 | if (last_status.kind == TARGET_WAITKIND_EXITED |
| 2769 | || last_status.kind == TARGET_WAITKIND_SIGNALLED) |
| 2770 | was_running = 0; |
| 2771 | else |
| 2772 | was_running = 1; |
| 2773 | |
| 2774 | if (!was_running && !multi_mode) |
| 2775 | { |
| 2776 | fprintf (stderr, "No program to debug. GDBserver exiting.\n"); |
| 2777 | exit (1); |
| 2778 | } |
| 2779 | |
| 2780 | while (1) |
| 2781 | { |
| 2782 | noack_mode = 0; |
| 2783 | multi_process = 0; |
| 2784 | /* Be sure we're out of tfind mode. */ |
| 2785 | current_traceframe = -1; |
| 2786 | |
| 2787 | remote_open (port); |
| 2788 | |
| 2789 | if (setjmp (toplevel) != 0) |
| 2790 | { |
| 2791 | /* An error occurred. */ |
| 2792 | if (response_needed) |
| 2793 | { |
| 2794 | write_enn (own_buf); |
| 2795 | putpkt (own_buf); |
| 2796 | } |
| 2797 | } |
| 2798 | |
| 2799 | /* Wait for events. This will return when all event sources are |
| 2800 | removed from the event loop. */ |
| 2801 | start_event_loop (); |
| 2802 | |
| 2803 | /* If an exit was requested (using the "monitor exit" command), |
| 2804 | terminate now. The only other way to get here is for |
| 2805 | getpkt to fail; close the connection and reopen it at the |
| 2806 | top of the loop. */ |
| 2807 | |
| 2808 | if (exit_requested || run_once) |
| 2809 | { |
| 2810 | /* If something fails and longjmps while detaching or |
| 2811 | killing inferiors, we'd end up here again, stuck in an |
| 2812 | infinite loop trap. Be sure that if that happens, we |
| 2813 | exit immediately instead. */ |
| 2814 | if (setjmp (toplevel) == 0) |
| 2815 | { |
| 2816 | detach_or_kill_for_exit (); |
| 2817 | exit (0); |
| 2818 | } |
| 2819 | else |
| 2820 | { |
| 2821 | fprintf (stderr, "Detach or kill failed. Exiting\n"); |
| 2822 | exit (1); |
| 2823 | } |
| 2824 | } |
| 2825 | |
| 2826 | fprintf (stderr, |
| 2827 | "Remote side has terminated connection. " |
| 2828 | "GDBserver will reopen the connection.\n"); |
| 2829 | |
| 2830 | if (tracing) |
| 2831 | { |
| 2832 | if (disconnected_tracing) |
| 2833 | { |
| 2834 | /* Try to enable non-stop/async mode, so we we can both |
| 2835 | wait for an async socket accept, and handle async |
| 2836 | target events simultaneously. There's also no point |
| 2837 | either in having the target always stop all threads, |
| 2838 | when we're going to pass signals down without |
| 2839 | informing GDB. */ |
| 2840 | if (!non_stop) |
| 2841 | { |
| 2842 | if (start_non_stop (1)) |
| 2843 | non_stop = 1; |
| 2844 | |
| 2845 | /* Detaching implicitly resumes all threads; simply |
| 2846 | disconnecting does not. */ |
| 2847 | } |
| 2848 | } |
| 2849 | else |
| 2850 | { |
| 2851 | fprintf (stderr, |
| 2852 | "Disconnected tracing disabled; stopping trace run.\n"); |
| 2853 | stop_tracing (); |
| 2854 | } |
| 2855 | } |
| 2856 | } |
| 2857 | } |
| 2858 | |
| 2859 | /* Process options coming from Z packets for *point at address |
| 2860 | POINT_ADDR. PACKET is the packet buffer. *PACKET is updated |
| 2861 | to point to the first char after the last processed option. */ |
| 2862 | |
| 2863 | static void |
| 2864 | process_point_options (CORE_ADDR point_addr, char **packet) |
| 2865 | { |
| 2866 | char *dataptr = *packet; |
| 2867 | |
| 2868 | /* Check if data has the correct format. */ |
| 2869 | if (*dataptr != ';') |
| 2870 | return; |
| 2871 | |
| 2872 | dataptr++; |
| 2873 | |
| 2874 | while (*dataptr) |
| 2875 | { |
| 2876 | switch (*dataptr) |
| 2877 | { |
| 2878 | case 'X': |
| 2879 | /* Conditional expression. */ |
| 2880 | fprintf (stderr, "Found breakpoint condition.\n"); |
| 2881 | add_breakpoint_condition (point_addr, &dataptr); |
| 2882 | break; |
| 2883 | default: |
| 2884 | /* Unrecognized token, just skip it. */ |
| 2885 | fprintf (stderr, "Unknown token %c, ignoring.\n", |
| 2886 | *dataptr); |
| 2887 | } |
| 2888 | |
| 2889 | /* Skip tokens until we find one that we recognize. */ |
| 2890 | while (*dataptr && *dataptr != 'X' && *dataptr != ';') |
| 2891 | dataptr++; |
| 2892 | } |
| 2893 | *packet = dataptr; |
| 2894 | } |
| 2895 | |
| 2896 | /* Event loop callback that handles a serial event. The first byte in |
| 2897 | the serial buffer gets us here. We expect characters to arrive at |
| 2898 | a brisk pace, so we read the rest of the packet with a blocking |
| 2899 | getpkt call. */ |
| 2900 | |
| 2901 | static int |
| 2902 | process_serial_event (void) |
| 2903 | { |
| 2904 | char ch; |
| 2905 | int i = 0; |
| 2906 | int signal; |
| 2907 | unsigned int len; |
| 2908 | int res; |
| 2909 | CORE_ADDR mem_addr; |
| 2910 | int pid; |
| 2911 | unsigned char sig; |
| 2912 | int packet_len; |
| 2913 | int new_packet_len = -1; |
| 2914 | |
| 2915 | /* Used to decide when gdbserver should exit in |
| 2916 | multi-mode/remote. */ |
| 2917 | static int have_ran = 0; |
| 2918 | |
| 2919 | if (!have_ran) |
| 2920 | have_ran = target_running (); |
| 2921 | |
| 2922 | disable_async_io (); |
| 2923 | |
| 2924 | response_needed = 0; |
| 2925 | packet_len = getpkt (own_buf); |
| 2926 | if (packet_len <= 0) |
| 2927 | { |
| 2928 | remote_close (); |
| 2929 | /* Force an event loop break. */ |
| 2930 | return -1; |
| 2931 | } |
| 2932 | response_needed = 1; |
| 2933 | |
| 2934 | i = 0; |
| 2935 | ch = own_buf[i++]; |
| 2936 | switch (ch) |
| 2937 | { |
| 2938 | case 'q': |
| 2939 | handle_query (own_buf, packet_len, &new_packet_len); |
| 2940 | break; |
| 2941 | case 'Q': |
| 2942 | handle_general_set (own_buf); |
| 2943 | break; |
| 2944 | case 'D': |
| 2945 | require_running (own_buf); |
| 2946 | |
| 2947 | if (multi_process) |
| 2948 | { |
| 2949 | i++; /* skip ';' */ |
| 2950 | pid = strtol (&own_buf[i], NULL, 16); |
| 2951 | } |
| 2952 | else |
| 2953 | pid = |
| 2954 | ptid_get_pid (((struct inferior_list_entry *) current_inferior)->id); |
| 2955 | |
| 2956 | if (tracing && disconnected_tracing) |
| 2957 | { |
| 2958 | struct thread_resume resume_info; |
| 2959 | struct process_info *process = find_process_pid (pid); |
| 2960 | |
| 2961 | if (process == NULL) |
| 2962 | { |
| 2963 | write_enn (own_buf); |
| 2964 | break; |
| 2965 | } |
| 2966 | |
| 2967 | fprintf (stderr, |
| 2968 | "Disconnected tracing in effect, " |
| 2969 | "leaving gdbserver attached to the process\n"); |
| 2970 | |
| 2971 | /* Make sure we're in non-stop/async mode, so we we can both |
| 2972 | wait for an async socket accept, and handle async target |
| 2973 | events simultaneously. There's also no point either in |
| 2974 | having the target stop all threads, when we're going to |
| 2975 | pass signals down without informing GDB. */ |
| 2976 | if (!non_stop) |
| 2977 | { |
| 2978 | if (debug_threads) |
| 2979 | fprintf (stderr, "Forcing non-stop mode\n"); |
| 2980 | |
| 2981 | non_stop = 1; |
| 2982 | start_non_stop (1); |
| 2983 | } |
| 2984 | |
| 2985 | process->gdb_detached = 1; |
| 2986 | |
| 2987 | /* Detaching implicitly resumes all threads. */ |
| 2988 | resume_info.thread = minus_one_ptid; |
| 2989 | resume_info.kind = resume_continue; |
| 2990 | resume_info.sig = 0; |
| 2991 | (*the_target->resume) (&resume_info, 1); |
| 2992 | |
| 2993 | write_ok (own_buf); |
| 2994 | break; /* from switch/case */ |
| 2995 | } |
| 2996 | |
| 2997 | fprintf (stderr, "Detaching from process %d\n", pid); |
| 2998 | stop_tracing (); |
| 2999 | if (detach_inferior (pid) != 0) |
| 3000 | write_enn (own_buf); |
| 3001 | else |
| 3002 | { |
| 3003 | discard_queued_stop_replies (pid); |
| 3004 | write_ok (own_buf); |
| 3005 | |
| 3006 | if (extended_protocol) |
| 3007 | { |
| 3008 | /* Treat this like a normal program exit. */ |
| 3009 | last_status.kind = TARGET_WAITKIND_EXITED; |
| 3010 | last_status.value.integer = 0; |
| 3011 | last_ptid = pid_to_ptid (pid); |
| 3012 | |
| 3013 | current_inferior = NULL; |
| 3014 | } |
| 3015 | else |
| 3016 | { |
| 3017 | putpkt (own_buf); |
| 3018 | remote_close (); |
| 3019 | |
| 3020 | /* If we are attached, then we can exit. Otherwise, we |
| 3021 | need to hang around doing nothing, until the child is |
| 3022 | gone. */ |
| 3023 | join_inferior (pid); |
| 3024 | exit (0); |
| 3025 | } |
| 3026 | } |
| 3027 | break; |
| 3028 | case '!': |
| 3029 | extended_protocol = 1; |
| 3030 | write_ok (own_buf); |
| 3031 | break; |
| 3032 | case '?': |
| 3033 | handle_status (own_buf); |
| 3034 | break; |
| 3035 | case 'H': |
| 3036 | if (own_buf[1] == 'c' || own_buf[1] == 'g' || own_buf[1] == 's') |
| 3037 | { |
| 3038 | ptid_t gdb_id, thread_id; |
| 3039 | int pid; |
| 3040 | |
| 3041 | require_running (own_buf); |
| 3042 | |
| 3043 | gdb_id = read_ptid (&own_buf[2], NULL); |
| 3044 | |
| 3045 | pid = ptid_get_pid (gdb_id); |
| 3046 | |
| 3047 | if (ptid_equal (gdb_id, null_ptid) |
| 3048 | || ptid_equal (gdb_id, minus_one_ptid)) |
| 3049 | thread_id = null_ptid; |
| 3050 | else if (pid != 0 |
| 3051 | && ptid_equal (pid_to_ptid (pid), |
| 3052 | gdb_id)) |
| 3053 | { |
| 3054 | struct thread_info *thread = |
| 3055 | (struct thread_info *) find_inferior (&all_threads, |
| 3056 | first_thread_of, |
| 3057 | &pid); |
| 3058 | if (!thread) |
| 3059 | { |
| 3060 | write_enn (own_buf); |
| 3061 | break; |
| 3062 | } |
| 3063 | |
| 3064 | thread_id = ((struct inferior_list_entry *)thread)->id; |
| 3065 | } |
| 3066 | else |
| 3067 | { |
| 3068 | thread_id = gdb_id_to_thread_id (gdb_id); |
| 3069 | if (ptid_equal (thread_id, null_ptid)) |
| 3070 | { |
| 3071 | write_enn (own_buf); |
| 3072 | break; |
| 3073 | } |
| 3074 | } |
| 3075 | |
| 3076 | if (own_buf[1] == 'g') |
| 3077 | { |
| 3078 | if (ptid_equal (thread_id, null_ptid)) |
| 3079 | { |
| 3080 | /* GDB is telling us to choose any thread. Check if |
| 3081 | the currently selected thread is still valid. If |
| 3082 | it is not, select the first available. */ |
| 3083 | struct thread_info *thread = |
| 3084 | (struct thread_info *) find_inferior_id (&all_threads, |
| 3085 | general_thread); |
| 3086 | if (thread == NULL) |
| 3087 | thread_id = all_threads.head->id; |
| 3088 | } |
| 3089 | |
| 3090 | general_thread = thread_id; |
| 3091 | set_desired_inferior (1); |
| 3092 | } |
| 3093 | else if (own_buf[1] == 'c') |
| 3094 | cont_thread = thread_id; |
| 3095 | |
| 3096 | write_ok (own_buf); |
| 3097 | } |
| 3098 | else |
| 3099 | { |
| 3100 | /* Silently ignore it so that gdb can extend the protocol |
| 3101 | without compatibility headaches. */ |
| 3102 | own_buf[0] = '\0'; |
| 3103 | } |
| 3104 | break; |
| 3105 | case 'g': |
| 3106 | require_running (own_buf); |
| 3107 | if (current_traceframe >= 0) |
| 3108 | { |
| 3109 | struct regcache *regcache = new_register_cache (); |
| 3110 | |
| 3111 | if (fetch_traceframe_registers (current_traceframe, |
| 3112 | regcache, -1) == 0) |
| 3113 | registers_to_string (regcache, own_buf); |
| 3114 | else |
| 3115 | write_enn (own_buf); |
| 3116 | free_register_cache (regcache); |
| 3117 | } |
| 3118 | else |
| 3119 | { |
| 3120 | struct regcache *regcache; |
| 3121 | |
| 3122 | set_desired_inferior (1); |
| 3123 | regcache = get_thread_regcache (current_inferior, 1); |
| 3124 | registers_to_string (regcache, own_buf); |
| 3125 | } |
| 3126 | break; |
| 3127 | case 'G': |
| 3128 | require_running (own_buf); |
| 3129 | if (current_traceframe >= 0) |
| 3130 | write_enn (own_buf); |
| 3131 | else |
| 3132 | { |
| 3133 | struct regcache *regcache; |
| 3134 | |
| 3135 | set_desired_inferior (1); |
| 3136 | regcache = get_thread_regcache (current_inferior, 1); |
| 3137 | registers_from_string (regcache, &own_buf[1]); |
| 3138 | write_ok (own_buf); |
| 3139 | } |
| 3140 | break; |
| 3141 | case 'm': |
| 3142 | require_running (own_buf); |
| 3143 | decode_m_packet (&own_buf[1], &mem_addr, &len); |
| 3144 | res = gdb_read_memory (mem_addr, mem_buf, len); |
| 3145 | if (res < 0) |
| 3146 | write_enn (own_buf); |
| 3147 | else |
| 3148 | convert_int_to_ascii (mem_buf, own_buf, res); |
| 3149 | break; |
| 3150 | case 'M': |
| 3151 | require_running (own_buf); |
| 3152 | decode_M_packet (&own_buf[1], &mem_addr, &len, &mem_buf); |
| 3153 | if (gdb_write_memory (mem_addr, mem_buf, len) == 0) |
| 3154 | write_ok (own_buf); |
| 3155 | else |
| 3156 | write_enn (own_buf); |
| 3157 | break; |
| 3158 | case 'X': |
| 3159 | require_running (own_buf); |
| 3160 | if (decode_X_packet (&own_buf[1], packet_len - 1, |
| 3161 | &mem_addr, &len, &mem_buf) < 0 |
| 3162 | || gdb_write_memory (mem_addr, mem_buf, len) != 0) |
| 3163 | write_enn (own_buf); |
| 3164 | else |
| 3165 | write_ok (own_buf); |
| 3166 | break; |
| 3167 | case 'C': |
| 3168 | require_running (own_buf); |
| 3169 | convert_ascii_to_int (own_buf + 1, &sig, 1); |
| 3170 | if (target_signal_to_host_p (sig)) |
| 3171 | signal = target_signal_to_host (sig); |
| 3172 | else |
| 3173 | signal = 0; |
| 3174 | myresume (own_buf, 0, signal); |
| 3175 | break; |
| 3176 | case 'S': |
| 3177 | require_running (own_buf); |
| 3178 | convert_ascii_to_int (own_buf + 1, &sig, 1); |
| 3179 | if (target_signal_to_host_p (sig)) |
| 3180 | signal = target_signal_to_host (sig); |
| 3181 | else |
| 3182 | signal = 0; |
| 3183 | myresume (own_buf, 1, signal); |
| 3184 | break; |
| 3185 | case 'c': |
| 3186 | require_running (own_buf); |
| 3187 | signal = 0; |
| 3188 | myresume (own_buf, 0, signal); |
| 3189 | break; |
| 3190 | case 's': |
| 3191 | require_running (own_buf); |
| 3192 | signal = 0; |
| 3193 | myresume (own_buf, 1, signal); |
| 3194 | break; |
| 3195 | case 'Z': /* insert_ ... */ |
| 3196 | /* Fallthrough. */ |
| 3197 | case 'z': /* remove_ ... */ |
| 3198 | { |
| 3199 | char *lenptr; |
| 3200 | char *dataptr; |
| 3201 | CORE_ADDR addr = strtoul (&own_buf[3], &lenptr, 16); |
| 3202 | int len = strtol (lenptr + 1, &dataptr, 16); |
| 3203 | char type = own_buf[1]; |
| 3204 | int res; |
| 3205 | const int insert = ch == 'Z'; |
| 3206 | |
| 3207 | /* Default to unrecognized/unsupported. */ |
| 3208 | res = 1; |
| 3209 | switch (type) |
| 3210 | { |
| 3211 | case '0': /* software-breakpoint */ |
| 3212 | case '1': /* hardware-breakpoint */ |
| 3213 | case '2': /* write watchpoint */ |
| 3214 | case '3': /* read watchpoint */ |
| 3215 | case '4': /* access watchpoint */ |
| 3216 | require_running (own_buf); |
| 3217 | if (insert && the_target->insert_point != NULL) |
| 3218 | { |
| 3219 | /* Insert the breakpoint. If it is already inserted, nothing |
| 3220 | will take place. */ |
| 3221 | res = (*the_target->insert_point) (type, addr, len); |
| 3222 | |
| 3223 | /* GDB may have sent us a list of *point parameters to be |
| 3224 | evaluated on the target's side. Read such list here. If we |
| 3225 | already have a list of parameters, GDB is telling us to drop |
| 3226 | that list and use this one instead. */ |
| 3227 | if (!res && (type == '0' || type == '1')) |
| 3228 | { |
| 3229 | /* Remove previous conditions. */ |
| 3230 | clear_gdb_breakpoint_conditions (addr); |
| 3231 | process_point_options (addr, &dataptr); |
| 3232 | } |
| 3233 | } |
| 3234 | else if (!insert && the_target->remove_point != NULL) |
| 3235 | res = (*the_target->remove_point) (type, addr, len); |
| 3236 | break; |
| 3237 | default: |
| 3238 | break; |
| 3239 | } |
| 3240 | |
| 3241 | if (res == 0) |
| 3242 | write_ok (own_buf); |
| 3243 | else if (res == 1) |
| 3244 | /* Unsupported. */ |
| 3245 | own_buf[0] = '\0'; |
| 3246 | else |
| 3247 | write_enn (own_buf); |
| 3248 | break; |
| 3249 | } |
| 3250 | case 'k': |
| 3251 | response_needed = 0; |
| 3252 | if (!target_running ()) |
| 3253 | /* The packet we received doesn't make sense - but we can't |
| 3254 | reply to it, either. */ |
| 3255 | return 0; |
| 3256 | |
| 3257 | fprintf (stderr, "Killing all inferiors\n"); |
| 3258 | for_each_inferior (&all_processes, kill_inferior_callback); |
| 3259 | |
| 3260 | /* When using the extended protocol, we wait with no program |
| 3261 | running. The traditional protocol will exit instead. */ |
| 3262 | if (extended_protocol) |
| 3263 | { |
| 3264 | last_status.kind = TARGET_WAITKIND_EXITED; |
| 3265 | last_status.value.sig = TARGET_SIGNAL_KILL; |
| 3266 | return 0; |
| 3267 | } |
| 3268 | else |
| 3269 | exit (0); |
| 3270 | |
| 3271 | case 'T': |
| 3272 | { |
| 3273 | ptid_t gdb_id, thread_id; |
| 3274 | |
| 3275 | require_running (own_buf); |
| 3276 | |
| 3277 | gdb_id = read_ptid (&own_buf[1], NULL); |
| 3278 | thread_id = gdb_id_to_thread_id (gdb_id); |
| 3279 | if (ptid_equal (thread_id, null_ptid)) |
| 3280 | { |
| 3281 | write_enn (own_buf); |
| 3282 | break; |
| 3283 | } |
| 3284 | |
| 3285 | if (mythread_alive (thread_id)) |
| 3286 | write_ok (own_buf); |
| 3287 | else |
| 3288 | write_enn (own_buf); |
| 3289 | } |
| 3290 | break; |
| 3291 | case 'R': |
| 3292 | response_needed = 0; |
| 3293 | |
| 3294 | /* Restarting the inferior is only supported in the extended |
| 3295 | protocol. */ |
| 3296 | if (extended_protocol) |
| 3297 | { |
| 3298 | if (target_running ()) |
| 3299 | for_each_inferior (&all_processes, |
| 3300 | kill_inferior_callback); |
| 3301 | fprintf (stderr, "GDBserver restarting\n"); |
| 3302 | |
| 3303 | /* Wait till we are at 1st instruction in prog. */ |
| 3304 | if (program_argv != NULL) |
| 3305 | start_inferior (program_argv); |
| 3306 | else |
| 3307 | { |
| 3308 | last_status.kind = TARGET_WAITKIND_EXITED; |
| 3309 | last_status.value.sig = TARGET_SIGNAL_KILL; |
| 3310 | } |
| 3311 | return 0; |
| 3312 | } |
| 3313 | else |
| 3314 | { |
| 3315 | /* It is a request we don't understand. Respond with an |
| 3316 | empty packet so that gdb knows that we don't support this |
| 3317 | request. */ |
| 3318 | own_buf[0] = '\0'; |
| 3319 | break; |
| 3320 | } |
| 3321 | case 'v': |
| 3322 | /* Extended (long) request. */ |
| 3323 | handle_v_requests (own_buf, packet_len, &new_packet_len); |
| 3324 | break; |
| 3325 | |
| 3326 | default: |
| 3327 | /* It is a request we don't understand. Respond with an empty |
| 3328 | packet so that gdb knows that we don't support this |
| 3329 | request. */ |
| 3330 | own_buf[0] = '\0'; |
| 3331 | break; |
| 3332 | } |
| 3333 | |
| 3334 | if (new_packet_len != -1) |
| 3335 | putpkt_binary (own_buf, new_packet_len); |
| 3336 | else |
| 3337 | putpkt (own_buf); |
| 3338 | |
| 3339 | response_needed = 0; |
| 3340 | |
| 3341 | if (!extended_protocol && have_ran && !target_running ()) |
| 3342 | { |
| 3343 | /* In non-stop, defer exiting until GDB had a chance to query |
| 3344 | the whole vStopped list (until it gets an OK). */ |
| 3345 | if (!notif_queue) |
| 3346 | { |
| 3347 | fprintf (stderr, "GDBserver exiting\n"); |
| 3348 | remote_close (); |
| 3349 | exit (0); |
| 3350 | } |
| 3351 | } |
| 3352 | |
| 3353 | if (exit_requested) |
| 3354 | return -1; |
| 3355 | |
| 3356 | return 0; |
| 3357 | } |
| 3358 | |
| 3359 | /* Event-loop callback for serial events. */ |
| 3360 | |
| 3361 | int |
| 3362 | handle_serial_event (int err, gdb_client_data client_data) |
| 3363 | { |
| 3364 | if (debug_threads) |
| 3365 | fprintf (stderr, "handling possible serial event\n"); |
| 3366 | |
| 3367 | /* Really handle it. */ |
| 3368 | if (process_serial_event () < 0) |
| 3369 | return -1; |
| 3370 | |
| 3371 | /* Be sure to not change the selected inferior behind GDB's back. |
| 3372 | Important in the non-stop mode asynchronous protocol. */ |
| 3373 | set_desired_inferior (1); |
| 3374 | |
| 3375 | return 0; |
| 3376 | } |
| 3377 | |
| 3378 | /* Event-loop callback for target events. */ |
| 3379 | |
| 3380 | int |
| 3381 | handle_target_event (int err, gdb_client_data client_data) |
| 3382 | { |
| 3383 | if (debug_threads) |
| 3384 | fprintf (stderr, "handling possible target event\n"); |
| 3385 | |
| 3386 | last_ptid = mywait (minus_one_ptid, &last_status, |
| 3387 | TARGET_WNOHANG, 1); |
| 3388 | |
| 3389 | if (last_status.kind != TARGET_WAITKIND_IGNORE) |
| 3390 | { |
| 3391 | int pid = ptid_get_pid (last_ptid); |
| 3392 | struct process_info *process = find_process_pid (pid); |
| 3393 | int forward_event = !gdb_connected () || process->gdb_detached; |
| 3394 | |
| 3395 | if (last_status.kind == TARGET_WAITKIND_EXITED |
| 3396 | || last_status.kind == TARGET_WAITKIND_SIGNALLED) |
| 3397 | { |
| 3398 | mark_breakpoints_out (process); |
| 3399 | mourn_inferior (process); |
| 3400 | } |
| 3401 | else |
| 3402 | { |
| 3403 | /* We're reporting this thread as stopped. Update its |
| 3404 | "want-stopped" state to what the client wants, until it |
| 3405 | gets a new resume action. */ |
| 3406 | current_inferior->last_resume_kind = resume_stop; |
| 3407 | current_inferior->last_status = last_status; |
| 3408 | } |
| 3409 | |
| 3410 | if (forward_event) |
| 3411 | { |
| 3412 | if (!target_running ()) |
| 3413 | { |
| 3414 | /* The last process exited. We're done. */ |
| 3415 | exit (0); |
| 3416 | } |
| 3417 | |
| 3418 | if (last_status.kind == TARGET_WAITKIND_STOPPED) |
| 3419 | { |
| 3420 | /* A thread stopped with a signal, but gdb isn't |
| 3421 | connected to handle it. Pass it down to the |
| 3422 | inferior, as if it wasn't being traced. */ |
| 3423 | struct thread_resume resume_info; |
| 3424 | |
| 3425 | if (debug_threads) |
| 3426 | fprintf (stderr, |
| 3427 | "GDB not connected; forwarding event %d for [%s]\n", |
| 3428 | (int) last_status.kind, |
| 3429 | target_pid_to_str (last_ptid)); |
| 3430 | |
| 3431 | resume_info.thread = last_ptid; |
| 3432 | resume_info.kind = resume_continue; |
| 3433 | resume_info.sig = target_signal_to_host (last_status.value.sig); |
| 3434 | (*the_target->resume) (&resume_info, 1); |
| 3435 | } |
| 3436 | else if (debug_threads) |
| 3437 | fprintf (stderr, "GDB not connected; ignoring event %d for [%s]\n", |
| 3438 | (int) last_status.kind, |
| 3439 | target_pid_to_str (last_ptid)); |
| 3440 | } |
| 3441 | else |
| 3442 | { |
| 3443 | /* Something interesting. Tell GDB about it. */ |
| 3444 | push_event (last_ptid, &last_status); |
| 3445 | } |
| 3446 | } |
| 3447 | |
| 3448 | /* Be sure to not change the selected inferior behind GDB's back. |
| 3449 | Important in the non-stop mode asynchronous protocol. */ |
| 3450 | set_desired_inferior (1); |
| 3451 | |
| 3452 | return 0; |
| 3453 | } |