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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 �yvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include "gdb_server.h"
  31 #include "target_request.h"
  32 #include "register.h"
  33 #include "server.h"
  34 #include "flash.h"
  35 #include "image.h"
  36 #include "jtag.h"
  37
  38
  39 #if 0
  40 #define _DEBUG_GDB_IO_
  41 #endif
  42
  43 static int gdb_breakpoint_override;
  44 static enum breakpoint_type gdb_breakpoint_override_type;
  45
  46 extern int gdb_error(connection_t *connection, int retval);
  47 static unsigned short gdb_port = 3333;
  48 static const char *DIGITS = "0123456789abcdef";
  49
  50 static void gdb_log_callback(void *priv, const char *file, int line,
  51                 const char *function, const char *string);
  52
  53 enum gdb_detach_mode
  54 {
  55         GDB_DETACH_RESUME,
  56         GDB_DETACH_RESET,
  57         GDB_DETACH_HALT,
  58         GDB_DETACH_NOTHING
  59 };
  60
  61 /* target behaviour on gdb detach */
  62 enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME;
  63
  64 /* number of gdb connections, mainly to supress gdb related debugging spam
  65  * in helper/log.c when no gdb connections are actually active */
  66 int gdb_actual_connections;
  67
  68 /* set if we are sending a memory map to gdb
  69  * via qXfer:memory-map:read packet */
  70 /* enabled by default*/
  71 int gdb_use_memory_map = 1;
  72 /* enabled by default*/
  73 int gdb_flash_program = 1;
  74
  75 /* if set, data aborts cause an error to be reported in memory read packets
  76  * see the code in gdb_read_memory_packet() for further explanations */
  77 int gdb_report_data_abort = 0;
  78
  79 int gdb_last_signal(target_t *target)
  80 {
  81         switch (target->debug_reason)
  82         {
  83                 case DBG_REASON_DBGRQ:
  84                         return 0x2; /* SIGINT */
  85                 case DBG_REASON_BREAKPOINT:
  86                 case DBG_REASON_WATCHPOINT:
  87                 case DBG_REASON_WPTANDBKPT:
  88                         return 0x05; /* SIGTRAP */
  89                 case DBG_REASON_SINGLESTEP:
  90                         return 0x05; /* SIGTRAP */
  91                 case DBG_REASON_NOTHALTED:
  92                         return 0x0; /* no signal... shouldn't happen */
  93                 default:
  94                         LOG_USER("undefined debug reason %d - target needs reset", target->debug_reason);
  95                         return 0x0;
  96         }
  97 }
  98
  99 int check_pending(connection_t *connection, int timeout_s, int *got_data)
 100 {
 101         /* a non-blocking socket will block if there is 0 bytes available on the socket,
 102          * but return with as many bytes as are available immediately
 103          */
 104         struct timeval tv;
 105         fd_set read_fds;
 106         gdb_connection_t *gdb_con = connection->priv;
 107         int t;
 108         if (got_data == NULL)
 109                 got_data=&t;
 110         *got_data = 0;
 111
 112         if (gdb_con->buf_cnt > 0)
 113         {
 114                 *got_data = 1;
 115                 return ERROR_OK;
 116         }
 117
 118         FD_ZERO(&read_fds);
 119         FD_SET(connection->fd, &read_fds);
 120
 121         tv.tv_sec = timeout_s;
 122         tv.tv_usec = 0;
 123         if (socket_select(connection->fd + 1, &read_fds, NULL, NULL, &tv) == 0)
 124         {
 125                 /* This can typically be because a "monitor" command took too long
 126                  * before printing any progress messages
 127                  */
 128                 if (timeout_s > 0)
 129                 {
 130                         return ERROR_GDB_TIMEOUT;
 131                 } else
 132                 {
 133                         return ERROR_OK;
 134                 }
 135         }
 136         *got_data = FD_ISSET(connection->fd, &read_fds) != 0;
 137         return ERROR_OK;
 138 }
 139
 140 int gdb_get_char(connection_t *connection, int* next_char)
 141 {
 142         gdb_connection_t *gdb_con = connection->priv;
 143         int retval = ERROR_OK;
 144
 145 #ifdef _DEBUG_GDB_IO_
 146         char *debug_buffer;
 147 #endif
 148
 149         if (gdb_con->buf_cnt-- > 0)
 150         {
 151                 *next_char = *(gdb_con->buf_p++);
 152                 if (gdb_con->buf_cnt > 0)
 153                         connection->input_pending = 1;
 154                 else
 155                         connection->input_pending = 0;
 156
 157 #ifdef _DEBUG_GDB_IO_
 158                 LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
 159 #endif
 160
 161                 return ERROR_OK;
 162         }
 163
 164         for (;;)
 165         {
 166                 if (connection->service->type == CONNECTION_PIPE)
 167                 {
 168                         gdb_con->buf_cnt = read(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
 169                 }
 170                 else
 171                 {
 172                         retval = check_pending(connection, 1, NULL);
 173                         if (retval != ERROR_OK)
 174                                 return retval;
 175                         gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE);
 176                 }
 177
 178                 if (gdb_con->buf_cnt > 0)
 179                 {
 180                         break;
 181                 }
 182                 if (gdb_con->buf_cnt == 0)
 183                 {
 184                         gdb_con->closed = 1;
 185                         return ERROR_SERVER_REMOTE_CLOSED;
 186                 }
 187
 188 #ifdef _WIN32
 189                 errno = WSAGetLastError();
 190
 191                 switch (errno)
 192                 {
 193                         case WSAEWOULDBLOCK:
 194                                 usleep(1000);
 195                                 break;
 196                         case WSAECONNABORTED:
 197                                 gdb_con->closed = 1;
 198                                 return ERROR_SERVER_REMOTE_CLOSED;
 199                         case WSAECONNRESET:
 200                                 gdb_con->closed = 1;
 201                                 return ERROR_SERVER_REMOTE_CLOSED;
 202                         default:
 203                                 LOG_ERROR("read: %d", errno);
 204                                 exit(-1);
 205                 }
 206 #else
 207                 switch (errno)
 208                 {
 209                         case EAGAIN:
 210                                 usleep(1000);
 211                                 break;
 212                         case ECONNABORTED:
 213                                 gdb_con->closed = 1;
 214                                 return ERROR_SERVER_REMOTE_CLOSED;
 215                         case ECONNRESET:
 216                                 gdb_con->closed = 1;
 217                                 return ERROR_SERVER_REMOTE_CLOSED;
 218                         default:
 219                                 LOG_ERROR("read: %s", strerror(errno));
 220                                 gdb_con->closed = 1;
 221                                 return ERROR_SERVER_REMOTE_CLOSED;
 222                 }
 223 #endif
 224         }
 225
 226 #ifdef _DEBUG_GDB_IO_
 227         debug_buffer = malloc(gdb_con->buf_cnt + 1);
 228         memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt);
 229         debug_buffer[gdb_con->buf_cnt] = 0;
 230         LOG_DEBUG("received '%s'", debug_buffer);
 231         free(debug_buffer);
 232 #endif
 233
 234         gdb_con->buf_p = gdb_con->buffer;
 235         gdb_con->buf_cnt--;
 236         *next_char = *(gdb_con->buf_p++);
 237         if (gdb_con->buf_cnt > 0)
 238                 connection->input_pending = 1;
 239         else
 240                 connection->input_pending = 0;
 241 #ifdef _DEBUG_GDB_IO_
 242         LOG_DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
 243 #endif
 244
 245         return retval;
 246 }
 247
 248 int gdb_putback_char(connection_t *connection, int last_char)
 249 {
 250         gdb_connection_t *gdb_con = connection->priv;
 251
 252         if (gdb_con->buf_p > gdb_con->buffer)
 253         {
 254                 *(--gdb_con->buf_p) = last_char;
 255                 gdb_con->buf_cnt++;
 256         }
 257         else
 258         {
 259                 LOG_ERROR("BUG: couldn't put character back");
 260         }
 261
 262         return ERROR_OK;
 263 }
 264
 265 /* The only way we can detect that the socket is closed is the first time
 266  * we write to it, we will fail. Subsequent write operations will
 267  * succeed. Shudder! */
 268 int gdb_write(connection_t *connection, void *data, int len)
 269 {
 270         gdb_connection_t *gdb_con = connection->priv;
 271         if (gdb_con->closed)
 272                 return ERROR_SERVER_REMOTE_CLOSED;
 273
 274         if (connection->service->type == CONNECTION_PIPE)
 275         {
 276                 /* write to stdout */
 277                 if (write(STDOUT_FILENO, data, len) == len)
 278                 {
 279                         return ERROR_OK;
 280                 }
 281         }
 282         else
 283         {
 284                 if (write_socket(connection->fd, data, len) == len)
 285                 {
 286                         return ERROR_OK;
 287                 }
 288         }
 289         gdb_con->closed = 1;
 290         return ERROR_SERVER_REMOTE_CLOSED;
 291 }
 292
 293 int gdb_put_packet_inner(connection_t *connection, char *buffer, int len)
 294 {
 295         int i;
 296         unsigned char my_checksum = 0;
 297 #ifdef _DEBUG_GDB_IO_
 298         char *debug_buffer;
 299 #endif
 300         int reply;
 301         int retval;
 302         gdb_connection_t *gdb_con = connection->priv;
 303
 304         for (i = 0; i < len; i++)
 305                 my_checksum += buffer[i];
 306
 307 #ifdef _DEBUG_GDB_IO_
 308         /*
 309          * At this point we should have nothing in the input queue from GDB,
 310          * however sometimes '-' is sent even though we've already received
 311          * an ACK (+) for everything we've sent off.
 312          */
 313         int gotdata;
 314         for (;;)
 315         {
 316                 if ((retval = check_pending(connection, 0, &gotdata)) != ERROR_OK)
 317                         return retval;
 318                 if (!gotdata)
 319                         break;
 320                 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
 321                         return retval;
 322                 if (reply == '$') {
 323                         /* fix a problem with some IAR tools */
 324                         gdb_putback_char(connection, reply);
 325                         LOG_DEBUG("Unexpected start of new packet");
 326                         break;
 327                 }
 328
 329                 LOG_WARNING("Discard unexpected char %c", reply);
 330         }
 331 #endif
 332
 333         while (1)
 334         {
 335 #ifdef _DEBUG_GDB_IO_
 336                 debug_buffer = malloc(len + 1);
 337                 memcpy(debug_buffer, buffer, len);
 338                 debug_buffer[len] = 0;
 339                 LOG_DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
 340                 free(debug_buffer);
 341 #endif
 342
 343                 char local_buffer[1024];
 344                 local_buffer[0] = '$';
 345                 if ((size_t)len + 4 <= sizeof(local_buffer))
 346                 {
 347                         /* performance gain on smaller packets by only a single call to gdb_write() */
 348                         memcpy(local_buffer + 1, buffer, len++);
 349                         local_buffer[len++] = '#';
 350                         local_buffer[len++] = DIGITS[(my_checksum >> 4) & 0xf];
 351                         local_buffer[len++] = DIGITS[my_checksum & 0xf];
 352                         if ((retval = gdb_write(connection, local_buffer, len)) != ERROR_OK)
 353                         {
 354                                 return retval;
 355                         }
 356                 }
 357                 else
 358                 {
 359                         /* larger packets are transmitted directly from caller supplied buffer
 360                            by several calls to gdb_write() to avoid dynamic allocation */
 361                         local_buffer[1] = '#';
 362                         local_buffer[2] = DIGITS[(my_checksum >> 4) & 0xf];
 363                         local_buffer[3] = DIGITS[my_checksum & 0xf];
 364                         if ((retval = gdb_write(connection, local_buffer, 1)) != ERROR_OK)
 365                         {
 366                                 return retval;
 367                         }
 368                         if ((retval = gdb_write(connection, buffer, len)) != ERROR_OK)
 369                         {
 370                                 return retval;
 371                         }
 372                         if ((retval = gdb_write(connection, local_buffer + 1, 3)) != ERROR_OK)
 373                         {
 374                                 return retval;
 375                         }
 376                 }
 377
 378                 if (gdb_con->noack_mode)
 379                         break;
 380
 381                 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
 382                         return retval;
 383
 384                 if (reply == '+')
 385                         break;
 386                 else if (reply == '-')
 387                 {
 388                         /* Stop sending output packets for now */
 389                         log_remove_callback(gdb_log_callback, connection);
 390                         LOG_WARNING("negative reply, retrying");
 391                 }
 392                 else if (reply == 0x3)
 393                 {
 394                         gdb_con->ctrl_c = 1;
 395                         if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
 396                                 return retval;
 397                         if (reply == '+')
 398                                 break;
 399                         else if (reply == '-')
 400                         {
 401                                 /* Stop sending output packets for now */
 402                                 log_remove_callback(gdb_log_callback, connection);
 403                                 LOG_WARNING("negative reply, retrying");
 404                         }
 405                         else if (reply == '$') {
 406                                 LOG_ERROR("GDB missing ack(1) - assumed good");
 407                                 gdb_putback_char(connection, reply);
 408                                 return ERROR_OK;
 409                         } else {
 410
 411                                 LOG_ERROR("unknown character(1) 0x%2.2x in reply, dropping connection", reply);
 412                                 gdb_con->closed = 1;
 413                                 return ERROR_SERVER_REMOTE_CLOSED;
 414                         }
 415                 }
 416                 else if (reply == '$') {
 417                         LOG_ERROR("GDB missing ack(2) - assumed good");
 418                         gdb_putback_char(connection, reply);
 419                         return ERROR_OK;
 420                 }
 421                 else
 422                 {
 423                         LOG_ERROR("unknown character(2) 0x%2.2x in reply, dropping connection", reply);
 424                         gdb_con->closed = 1;
 425                         return ERROR_SERVER_REMOTE_CLOSED;
 426                 }
 427         }
 428         if (gdb_con->closed)
 429                 return ERROR_SERVER_REMOTE_CLOSED;
 430
 431         return ERROR_OK;
 432 }
 433
 434 int gdb_put_packet(connection_t *connection, char *buffer, int len)
 435 {
 436         gdb_connection_t *gdb_con = connection->priv;
 437         gdb_con->busy = 1;
 438         int retval = gdb_put_packet_inner(connection, buffer, len);
 439         gdb_con->busy = 0;
 440
 441         /* we sent some data, reset timer for keep alive messages */
 442         kept_alive();
 443
 444         return retval;
 445 }
 446
 447 static __inline__ int fetch_packet(connection_t *connection, int *checksum_ok, int noack, int *len, char *buffer)
 448 {
 449         unsigned char my_checksum = 0;
 450         char checksum[3];
 451         int character;
 452         int retval;
 453
 454         gdb_connection_t *gdb_con = connection->priv;
 455         my_checksum = 0;
 456         int count = 0;
 457         count = 0;
 458         for (;;)
 459         {
 460                 /* The common case is that we have an entire packet with no escape chars.
 461                  * We need to leave at least 2 bytes in the buffer to have
 462                  * gdb_get_char() update various bits and bobs correctly.
 463                  */
 464                 if ((gdb_con->buf_cnt > 2) && ((gdb_con->buf_cnt + count) < *len))
 465                 {
 466                         /* The compiler will struggle a bit with constant propagation and
 467                          * aliasing, so we help it by showing that these values do not
 468                          * change inside the loop
 469                          */
 470                         int i;
 471                         char *buf = gdb_con->buf_p;
 472                         int run = gdb_con->buf_cnt - 2;
 473                         i = 0;
 474                         int done = 0;
 475                         while (i < run)
 476                         {
 477                                 character = *buf++;
 478                                 i++;
 479                                 if (character == '#')
 480                                 {
 481                                         /* Danger! character can be '#' when esc is
 482                                          * used so we need an explicit boolean for done here.
 483                                          */
 484                                         done = 1;
 485                                         break;
 486                                 }
 487
 488                                 if (character == '}')
 489                                 {
 490                                         /* data transmitted in binary mode (X packet)
 491                                          * uses 0x7d as escape character */
 492                                         my_checksum += character & 0xff;
 493                                         character = *buf++;
 494                                         i++;
 495                                         my_checksum += character & 0xff;
 496                                         buffer[count++] = (character ^ 0x20) & 0xff;
 497                                 }
 498                                 else
 499                                 {
 500                                         my_checksum += character & 0xff;
 501                                         buffer[count++] = character & 0xff;
 502                                 }
 503                         }
 504                         gdb_con->buf_p += i;
 505                         gdb_con->buf_cnt -= i;
 506                         if (done)
 507                                 break;
 508                 }
 509                 if (count > *len)
 510                 {
 511                         LOG_ERROR("packet buffer too small");
 512                         return ERROR_GDB_BUFFER_TOO_SMALL;
 513                 }
 514
 515                 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 516                         return retval;
 517
 518                 if (character == '#')
 519                         break;
 520
 521                 if (character == '}')
 522                 {
 523                         /* data transmitted in binary mode (X packet)
 524                          * uses 0x7d as escape character */
 525                         my_checksum += character & 0xff;
 526                         if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 527                                 return retval;
 528                         my_checksum += character & 0xff;
 529                         buffer[count++] = (character ^ 0x20) & 0xff;
 530                 }
 531                 else
 532                 {
 533                         my_checksum += character & 0xff;
 534                         buffer[count++] = character & 0xff;
 535                 }
 536         }
 537
 538         *len = count;
 539
 540         if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 541                 return retval;
 542         checksum[0] = character;
 543         if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 544                 return retval;
 545         checksum[1] = character;
 546         checksum[2] = 0;
 547
 548         if (!noack)
 549         {
 550                 *checksum_ok = (my_checksum == strtoul(checksum, NULL, 16));
 551         }
 552
 553         return ERROR_OK;
 554 }
 555
 556 int gdb_get_packet_inner(connection_t *connection, char *buffer, int *len)
 557 {
 558         int character;
 559         int retval;
 560         gdb_connection_t *gdb_con = connection->priv;
 561
 562         while (1)
 563         {
 564                 do
 565                 {
 566                         if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 567                                 return retval;
 568
 569 #ifdef _DEBUG_GDB_IO_
 570                         LOG_DEBUG("character: '%c'", character);
 571 #endif
 572
 573                         switch (character)
 574                         {
 575                                 case '$':
 576                                         break;
 577                                 case '+':
 578                                         /* gdb sends a dummy ack '+' at every remote connect - see remote_start_remote (remote.c)
 579                                          * incase anyone tries to debug why they receive this warning every time */
 580                                         LOG_WARNING("acknowledgment received, but no packet pending");
 581                                         break;
 582                                 case '-':
 583                                         LOG_WARNING("negative acknowledgment, but no packet pending");
 584                                         break;
 585                                 case 0x3:
 586                                         gdb_con->ctrl_c = 1;
 587                                         *len = 0;
 588                                         return ERROR_OK;
 589                                 default:
 590                                         LOG_WARNING("ignoring character 0x%x", character);
 591                                         break;
 592                         }
 593                 } while (character != '$');
 594
 595
 596
 597                 int checksum_ok = 0;
 598                 /* explicit code expansion here to get faster inlined code in -O3 by not
 599                  * calculating checksum
 600                  */
 601                 if (gdb_con->noack_mode)
 602                 {
 603                         if ((retval = fetch_packet(connection, &checksum_ok, 1, len, buffer)) != ERROR_OK)
 604                                 return retval;
 605                 } else
 606                 {
 607                         if ((retval = fetch_packet(connection, &checksum_ok, 0, len, buffer)) != ERROR_OK)
 608                                 return retval;
 609                 }
 610
 611                 if (gdb_con->noack_mode)
 612                 {
 613                         /* checksum is not checked in noack mode */
 614                         break;
 615                 }
 616                 if (checksum_ok)
 617                 {
 618                         if ((retval = gdb_write(connection, "+", 1)) != ERROR_OK)
 619                         {
 620                                 return retval;
 621                         }
 622                         break;
 623                 }
 624         }
 625         if (gdb_con->closed)
 626                 return ERROR_SERVER_REMOTE_CLOSED;
 627
 628         return ERROR_OK;
 629 }
 630
 631 int gdb_get_packet(connection_t *connection, char *buffer, int *len)
 632 {
 633         gdb_connection_t *gdb_con = connection->priv;
 634         gdb_con->busy = 1;
 635         int retval = gdb_get_packet_inner(connection, buffer, len);
 636         gdb_con->busy = 0;
 637         return retval;
 638 }
 639
 640 int gdb_output_con(connection_t *connection, const char* line)
 641 {
 642         char *hex_buffer;
 643         int i, bin_size;
 644
 645         bin_size = strlen(line);
 646
 647         hex_buffer = malloc(bin_size*2 + 2);
 648         if (hex_buffer == NULL)
 649                 return ERROR_GDB_BUFFER_TOO_SMALL;
 650
 651         hex_buffer[0] = 'O';
 652         for (i = 0; i < bin_size; i++)
 653                 snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);
 654         hex_buffer[bin_size*2 + 1] = 0;
 655
 656         int retval = gdb_put_packet(connection, hex_buffer, bin_size*2 + 1);
 657
 658         free(hex_buffer);
 659         return retval;
 660 }
 661
 662 int gdb_output(struct command_context_s *context, const char* line)
 663 {
 664         /* this will be dumped to the log and also sent as an O packet if possible */
 665         LOG_USER_N("%s", line);
 666         return ERROR_OK;
 667 }
 668
 669
 670 static void gdb_frontend_halted(struct target_s *target, connection_t *connection)
 671 {
 672         gdb_connection_t *gdb_connection = connection->priv;
 673
 674         /* In the GDB protocol when we are stepping or continuing execution,
 675          * we have a lingering reply. Upon receiving a halted event
 676          * when we have that lingering packet, we reply to the original
 677          * step or continue packet.
 678          *
 679          * Executing monitor commands can bring the target in and
 680          * out of the running state so we'll see lots of TARGET_EVENT_XXX
 681          * that are to be ignored.
 682          */
 683         if (gdb_connection->frontend_state == TARGET_RUNNING)
 684         {
 685                 char sig_reply[4];
 686                 int signal;
 687
 688                 /* stop forwarding log packets! */
 689                 log_remove_callback(gdb_log_callback, connection);
 690
 691                 if (gdb_connection->ctrl_c)
 692                 {
 693                         signal = 0x2;
 694                         gdb_connection->ctrl_c = 0;
 695                 }
 696                 else
 697                 {
 698                         signal = gdb_last_signal(target);
 699                 }
 700
 701                 snprintf(sig_reply, 4, "T%2.2x", signal);
 702                 gdb_put_packet(connection, sig_reply, 3);
 703                 gdb_connection->frontend_state = TARGET_HALTED;
 704         }
 705 }
 706
 707 int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
 708 {
 709         int retval;
 710         connection_t *connection = priv;
 711
 712         target_handle_event(target, event);
 713         switch (event)
 714         {
 715                 case TARGET_EVENT_EARLY_HALTED:
 716                         gdb_frontend_halted(target, connection);
 717                         break;
 718                 case TARGET_EVENT_HALTED:
 719                         target_call_event_callbacks(target, TARGET_EVENT_GDB_END);
 720                         break;
 721                 case TARGET_EVENT_GDB_FLASH_ERASE_START:
 722                         target_handle_event(target, TARGET_EVENT_OLD_gdb_program_config);
 723                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 724                         {
 725                                 return retval;
 726                         }
 727                         break;
 728                 default:
 729                         break;
 730         }
 731
 732         return ERROR_OK;
 733 }
 734
 735 int gdb_new_connection(connection_t *connection)
 736 {
 737         gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t));
 738         gdb_service_t *gdb_service = connection->service->priv;
 739         int retval;
 740         int initial_ack;
 741
 742         connection->priv = gdb_connection;
 743
 744         /* initialize gdb connection information */
 745         gdb_connection->buf_p = gdb_connection->buffer;
 746         gdb_connection->buf_cnt = 0;
 747         gdb_connection->ctrl_c = 0;
 748         gdb_connection->frontend_state = TARGET_HALTED;
 749         gdb_connection->vflash_image = NULL;
 750         gdb_connection->closed = 0;
 751         gdb_connection->busy = 0;
 752         gdb_connection->noack_mode = 0;
 753
 754         /* send ACK to GDB for debug request */
 755         gdb_write(connection, "+", 1);
 756
 757         /* output goes through gdb connection */
 758         command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
 759
 760         /* we must remove all breakpoints registered to the target as a previous
 761          * GDB session could leave dangling breakpoints if e.g. communication
 762          * timed out.
 763          */
 764         breakpoint_clear_target(gdb_service->target);
 765         watchpoint_clear_target(gdb_service->target);
 766
 767         /* register callback to be informed about target events */
 768         target_register_event_callback(gdb_target_callback_event_handler, connection);
 769
 770         /* a gdb session just attached, try to put the target in halt mode.
 771          *
 772          * DANGER!!!!
 773          *
 774          * If the halt fails(e.g. target needs a reset, JTAG communication not
 775          * working, etc.), then the GDB connect will succeed as
 776          * the get_gdb_reg_list() will lie and return a register list with
 777          * dummy values.
 778          *
 779          * This allows GDB monitor commands to be run from a GDB init script to
 780          * initialize the target
 781          *
 782          * Also, since the halt() is asynchronous target connect will be
 783          * instantaneous and thus avoiding annoying timeout problems during
 784          * connect.
 785          */
 786         target_halt(gdb_service->target);
 787         /* FIX!!!! could extended-remote work better here?
 788          *
 789          *  wait a tiny bit for halted state or we just continue. The
 790          * GDB register packet will then contain garbage
 791          */
 792         target_wait_state(gdb_service->target, TARGET_HALTED, 500);
 793
 794         /* remove the initial ACK from the incoming buffer */
 795         if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
 796                 return retval;
 797
 798         /* FIX!!!??? would we actually ever receive a + here???
 799          * Not observed.
 800          */
 801         if (initial_ack != '+')
 802                 gdb_putback_char(connection, initial_ack);
 803         target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_ATTACH);
 804
 805         gdb_actual_connections++;
 806         LOG_DEBUG("New GDB Connection: %d, Target %s, state: %s",
 807                   gdb_actual_connections,
 808                   gdb_service->target->cmd_name,
 809                   target_state_name(gdb_service->target));
 810
 811         return ERROR_OK;
 812 }
 813
 814 int gdb_connection_closed(connection_t *connection)
 815 {
 816         gdb_service_t *gdb_service = connection->service->priv;
 817         gdb_connection_t *gdb_connection = connection->priv;
 818
 819         gdb_actual_connections--;
 820         LOG_DEBUG("GDB Close, Target: %s, state: %s, gdb_actual_connections=%d",
 821                   gdb_service->target->cmd_name,
 822                   target_state_name(gdb_service->target),
 823                   gdb_actual_connections);
 824
 825         /* see if an image built with vFlash commands is left */
 826         if (gdb_connection->vflash_image)
 827         {
 828                 image_close(gdb_connection->vflash_image);
 829                 free(gdb_connection->vflash_image);
 830                 gdb_connection->vflash_image = NULL;
 831         }
 832
 833         /* if this connection registered a debug-message receiver delete it */
 834         delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
 835
 836         if (connection->priv)
 837         {
 838                 free(connection->priv);
 839                 connection->priv = NULL;
 840         }
 841         else
 842         {
 843                 LOG_ERROR("BUG: connection->priv == NULL");
 844         }
 845
 846         target_unregister_event_callback(gdb_target_callback_event_handler, connection);
 847         target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_END);
 848         log_remove_callback(gdb_log_callback, connection);
 849
 850         target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_DETACH);
 851
 852         return ERROR_OK;
 853 }
 854
 855 void gdb_send_error(connection_t *connection, uint8_t the_error)
 856 {
 857         char err[4];
 858         snprintf(err, 4, "E%2.2X", the_error);
 859         gdb_put_packet(connection, err, 3);
 860 }
 861
 862 int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
 863 {
 864         char sig_reply[4];
 865         int signal;
 866
 867         signal = gdb_last_signal(target);
 868
 869         snprintf(sig_reply, 4, "S%2.2x", signal);
 870         gdb_put_packet(connection, sig_reply, 3);
 871
 872         return ERROR_OK;
 873 }
 874
 875 static int gdb_reg_pos(target_t *target, int pos, int len)
 876 {
 877         if (target->endianness == TARGET_LITTLE_ENDIAN)
 878                 return pos;
 879         else
 880                 return len - 1 - pos;
 881 }
 882
 883 /* Convert register to string of bytes. NB! The # of bits in the
 884  * register might be non-divisible by 8(a byte), in which
 885  * case an entire byte is shown.
 886  *
 887  * NB! the format on the wire is the target endianess
 888  *
 889  * The format of reg->value is little endian
 890  *
 891  */
 892 void gdb_str_to_target(target_t *target, char *tstr, reg_t *reg)
 893 {
 894         int i;
 895
 896         uint8_t *buf;
 897         int buf_len;
 898         buf = reg->value;
 899         buf_len = CEIL(reg->size, 8);
 900
 901         for (i = 0; i < buf_len; i++)
 902         {
 903                 int j = gdb_reg_pos(target, i, buf_len);
 904                 tstr[i*2]   = DIGITS[(buf[j]>>4) & 0xf];
 905                 tstr[i*2 + 1] = DIGITS[buf[j]&0xf];
 906         }
 907 }
 908
 909 static int hextoint(char c)
 910 {
 911         if (c>='0'&&c<='9')
 912         {
 913                 return c-'0';
 914         }
 915         c = toupper(c);
 916         if (c>='A'&&c<='F')
 917         {
 918                 return c-'A'+10;
 919         }
 920         LOG_ERROR("BUG: invalid register value %08x", c);
 921         return 0;
 922 }
 923
 924 /* copy over in register buffer */
 925 void gdb_target_to_reg(target_t *target, char *tstr, int str_len, uint8_t *bin)
 926 {
 927         if (str_len % 2)
 928         {
 929                 LOG_ERROR("BUG: gdb value with uneven number of characters encountered");
 930                 exit(-1);
 931         }
 932
 933         int i;
 934         for (i = 0; i < str_len; i += 2)
 935         {
 936                 uint8_t t = hextoint(tstr[i]) << 4;
 937                 t |= hextoint(tstr[i + 1]);
 938
 939                 int j = gdb_reg_pos(target, i/2, str_len/2);
 940                 bin[j] = t;
 941         }
 942 }
 943
 944 int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
 945 {
 946         reg_t **reg_list;
 947         int reg_list_size;
 948         int retval;
 949         int reg_packet_size = 0;
 950         char *reg_packet;
 951         char *reg_packet_p;
 952         int i;
 953
 954 #ifdef _DEBUG_GDB_IO_
 955         LOG_DEBUG("-");
 956 #endif
 957
 958         if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 959         {
 960                 return gdb_error(connection, retval);
 961         }
 962
 963         for (i = 0; i < reg_list_size; i++)
 964         {
 965                 reg_packet_size += reg_list[i]->size;
 966         }
 967
 968         reg_packet = malloc(CEIL(reg_packet_size, 8) * 2);
 969         reg_packet_p = reg_packet;
 970
 971         for (i = 0; i < reg_list_size; i++)
 972         {
 973                 gdb_str_to_target(target, reg_packet_p, reg_list[i]);
 974                 reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;
 975         }
 976
 977 #ifdef _DEBUG_GDB_IO_
 978         {
 979                 char *reg_packet_p;
 980                 reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
 981                 LOG_DEBUG("reg_packet: %s", reg_packet_p);
 982                 free(reg_packet_p);
 983         }
 984 #endif
 985
 986         gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);
 987         free(reg_packet);
 988
 989         free(reg_list);
 990
 991         return ERROR_OK;
 992 }
 993
 994 int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 995 {
 996         int i;
 997         reg_t **reg_list;
 998         int reg_list_size;
 999         int retval;
1000         char *packet_p;
1001
1002 #ifdef _DEBUG_GDB_IO_
1003         LOG_DEBUG("-");
1004 #endif
1005
1006         /* skip command character */
1007         packet++;
1008         packet_size--;
1009
1010         if (packet_size % 2)
1011         {
1012                 LOG_WARNING("GDB set_registers packet with uneven characters received, dropping connection");
1013                 return ERROR_SERVER_REMOTE_CLOSED;
1014         }
1015
1016         if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1017         {
1018                 return gdb_error(connection, retval);
1019         }
1020
1021         packet_p = packet;
1022         for (i = 0; i < reg_list_size; i++)
1023         {
1024                 uint8_t *bin_buf;
1025                 int chars = (CEIL(reg_list[i]->size, 8) * 2);
1026
1027                 if (packet_p + chars > packet + packet_size)
1028                 {
1029                         LOG_ERROR("BUG: register packet is too small for registers");
1030                 }
1031
1032                 reg_arch_type_t *arch_type;
1033                 bin_buf = malloc(CEIL(reg_list[i]->size, 8));
1034                 gdb_target_to_reg(target, packet_p, chars, bin_buf);
1035
1036                 /* get register arch_type, and call set method */
1037                 arch_type = register_get_arch_type(reg_list[i]->arch_type);
1038
1039                 arch_type->set(reg_list[i], bin_buf);
1040
1041                 /* advance packet pointer */
1042                 packet_p += chars;
1043
1044
1045                 free(bin_buf);
1046         }
1047
1048         /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
1049         free(reg_list);
1050
1051         gdb_put_packet(connection, "OK", 2);
1052
1053         return ERROR_OK;
1054 }
1055
1056 int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1057 {
1058         char *reg_packet;
1059         int reg_num = strtoul(packet + 1, NULL, 16);
1060         reg_t **reg_list;
1061         int reg_list_size;
1062         int retval;
1063
1064 #ifdef _DEBUG_GDB_IO_
1065         LOG_DEBUG("-");
1066 #endif
1067
1068         if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1069         {
1070                 return gdb_error(connection, retval);
1071         }
1072
1073         if (reg_list_size <= reg_num)
1074         {
1075                 LOG_ERROR("gdb requested a non-existing register");
1076                 exit(-1);
1077         }
1078
1079         reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
1080
1081         gdb_str_to_target(target, reg_packet, reg_list[reg_num]);
1082
1083         gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2);
1084
1085         free(reg_list);
1086         free(reg_packet);
1087
1088         return ERROR_OK;
1089 }
1090
1091 int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1092 {
1093         char *separator;
1094         uint8_t *bin_buf;
1095         int reg_num = strtoul(packet + 1, &separator, 16);
1096         reg_t **reg_list;
1097         int reg_list_size;
1098         int retval;
1099         reg_arch_type_t *arch_type;
1100
1101         LOG_DEBUG("-");
1102
1103         if ((retval = target_get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
1104         {
1105                 return gdb_error(connection, retval);
1106         }
1107
1108         if (reg_list_size < reg_num)
1109         {
1110                 LOG_ERROR("gdb requested a non-existing register");
1111                 return ERROR_SERVER_REMOTE_CLOSED;
1112         }
1113
1114         if (*separator != '=')
1115         {
1116                 LOG_ERROR("GDB 'set register packet', but no '=' following the register number");
1117                 return ERROR_SERVER_REMOTE_CLOSED;
1118         }
1119
1120         /* convert from GDB-string (target-endian) to hex-string (big-endian) */
1121         bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
1122         int chars = (CEIL(reg_list[reg_num]->size, 8) * 2);
1123
1124         /* fix!!! add some sanity checks on packet size here */
1125
1126         gdb_target_to_reg(target, separator + 1, chars, bin_buf);
1127
1128                 /* get register arch_type, and call set method */
1129         arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
1130         arch_type->set(reg_list[reg_num], bin_buf);
1131
1132         gdb_put_packet(connection, "OK", 2);
1133
1134         free(bin_buf);
1135         free(reg_list);
1136
1137         return ERROR_OK;
1138 }
1139
1140 int gdb_error(connection_t *connection, int retval)
1141 {
1142         switch (retval)
1143         {
1144                 case ERROR_TARGET_DATA_ABORT:
1145                         gdb_send_error(connection, EIO);
1146                         break;
1147                 case ERROR_TARGET_TRANSLATION_FAULT:
1148                         gdb_send_error(connection, EFAULT);
1149                         break;
1150                 case ERROR_TARGET_UNALIGNED_ACCESS:
1151                         gdb_send_error(connection, EFAULT);
1152                         break;
1153                 case ERROR_TARGET_NOT_HALTED:
1154                         gdb_send_error(connection, EFAULT);
1155                         break;
1156                 default:
1157                         /* This could be that the target reset itself. */
1158                         LOG_ERROR("unexpected error %i", retval);
1159                         gdb_send_error(connection, EFAULT);
1160                         break;
1161         }
1162
1163         return ERROR_OK;
1164 }
1165
1166 /* We don't have to worry about the default 2 second timeout for GDB packets,
1167  * because GDB breaks up large memory reads into smaller reads.
1168  *
1169  * 8191 bytes by the looks of it. Why 8191 bytes instead of 8192?????
1170  */
1171 int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1172 {
1173         char *separator;
1174         uint32_t addr = 0;
1175         uint32_t len = 0;
1176
1177         uint8_t *buffer;
1178         char *hex_buffer;
1179
1180         int retval = ERROR_OK;
1181
1182         /* skip command character */
1183         packet++;
1184
1185         addr = strtoul(packet, &separator, 16);
1186
1187         if (*separator != ',')
1188         {
1189                 LOG_ERROR("incomplete read memory packet received, dropping connection");
1190                 return ERROR_SERVER_REMOTE_CLOSED;
1191         }
1192
1193         len = strtoul(separator + 1, NULL, 16);
1194
1195         buffer = malloc(len);
1196
1197         LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1198
1199         retval = target_read_buffer(target, addr, len, buffer);
1200
1201         if ((retval != ERROR_OK)&&!gdb_report_data_abort)
1202         {
1203                 /* TODO : Here we have to lie and send back all zero's lest stack traces won't work.
1204                  * At some point this might be fixed in GDB, in which case this code can be removed.
1205                  *
1206                  * OpenOCD developers are acutely aware of this problem, but there is nothing
1207                  * gained by involving the user in this problem that hopefully will get resolved
1208                  * eventually
1209                  *
1210                  * http://sourceware.org/cgi-bin/gnatsweb.pl?cmd = view%20audit-trail&database = gdb&pr = 2395
1211                  *
1212                  * For now, the default is to fix up things to make current GDB versions work.
1213                  * This can be overwritten using the gdb_report_data_abort <'enable'|'disable'> command.
1214                  */
1215                 memset(buffer, 0, len);
1216                 retval = ERROR_OK;
1217         }
1218
1219         if (retval == ERROR_OK)
1220         {
1221                 hex_buffer = malloc(len * 2 + 1);
1222
1223                 uint32_t i;
1224                 for (i = 0; i < len; i++)
1225                 {
1226                         uint8_t t = buffer[i];
1227                         hex_buffer[2 * i] = DIGITS[(t >> 4) & 0xf];
1228                         hex_buffer[2 * i + 1] = DIGITS[t & 0xf];
1229                 }
1230
1231                 gdb_put_packet(connection, hex_buffer, len * 2);
1232
1233                 free(hex_buffer);
1234         }
1235         else
1236         {
1237                 retval = gdb_error(connection, retval);
1238         }
1239
1240         free(buffer);
1241
1242         return retval;
1243 }
1244
1245 int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1246 {
1247         char *separator;
1248         uint32_t addr = 0;
1249         uint32_t len = 0;
1250
1251         uint8_t *buffer;
1252
1253         uint32_t i;
1254         int retval;
1255
1256         /* skip command character */
1257         packet++;
1258
1259         addr = strtoul(packet, &separator, 16);
1260
1261         if (*separator != ',')
1262         {
1263                 LOG_ERROR("incomplete write memory packet received, dropping connection");
1264                 return ERROR_SERVER_REMOTE_CLOSED;
1265         }
1266
1267         len = strtoul(separator + 1, &separator, 16);
1268
1269         if (*(separator++) != ':')
1270         {
1271                 LOG_ERROR("incomplete write memory packet received, dropping connection");
1272                 return ERROR_SERVER_REMOTE_CLOSED;
1273         }
1274
1275         buffer = malloc(len);
1276
1277         LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1278
1279         for (i = 0; i < len; i++)
1280         {
1281                 uint32_t tmp;
1282                 sscanf(separator + 2*i, "%2" SCNx32 , &tmp);
1283                 buffer[i] = tmp;
1284         }
1285
1286         retval = target_write_buffer(target, addr, len, buffer);
1287
1288         if (retval == ERROR_OK)
1289         {
1290                 gdb_put_packet(connection, "OK", 2);
1291         }
1292         else
1293         {
1294                 retval = gdb_error(connection, retval);
1295         }
1296
1297         free(buffer);
1298
1299         return retval;
1300 }
1301
1302 int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1303 {
1304         char *separator;
1305         uint32_t addr = 0;
1306         uint32_t len = 0;
1307
1308         int retval;
1309
1310         /* skip command character */
1311         packet++;
1312
1313         addr = strtoul(packet, &separator, 16);
1314
1315         if (*separator != ',')
1316         {
1317                 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1318                 return ERROR_SERVER_REMOTE_CLOSED;
1319         }
1320
1321         len = strtoul(separator + 1, &separator, 16);
1322
1323         if (*(separator++) != ':')
1324         {
1325                 LOG_ERROR("incomplete write memory binary packet received, dropping connection");
1326                 return ERROR_SERVER_REMOTE_CLOSED;
1327         }
1328
1329         retval = ERROR_OK;
1330         if (len)
1331         {
1332                 LOG_DEBUG("addr: 0x%8.8" PRIx32 ", len: 0x%8.8" PRIx32 "", addr, len);
1333
1334                 retval = target_write_buffer(target, addr, len, (uint8_t*)separator);
1335         }
1336
1337         if (retval == ERROR_OK)
1338         {
1339                 gdb_put_packet(connection, "OK", 2);
1340         }
1341         else
1342         {
1343                 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1344                         return retval;
1345         }
1346
1347         return ERROR_OK;
1348 }
1349
1350 int gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1351 {
1352         int current = 0;
1353         uint32_t address = 0x0;
1354         int retval = ERROR_OK;
1355
1356         LOG_DEBUG("-");
1357
1358         if (packet_size > 1)
1359         {
1360                 packet[packet_size] = 0;
1361                 address = strtoul(packet + 1, NULL, 16);
1362         }
1363         else
1364         {
1365                 current = 1;
1366         }
1367
1368         if (packet[0] == 'c')
1369         {
1370                 LOG_DEBUG("continue");
1371                 target_handle_event(target, TARGET_EVENT_OLD_pre_resume);
1372                 retval = target_resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
1373         }
1374         else if (packet[0] == 's')
1375         {
1376                 LOG_DEBUG("step");
1377                 /* step at current or address, don't handle breakpoints */
1378                 retval = target_step(target, current, address, 0);
1379         }
1380         return retval;
1381 }
1382
1383 int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1384 {
1385         int type;
1386         enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
1387         enum watchpoint_rw wp_type;
1388         uint32_t address;
1389         uint32_t size;
1390         char *separator;
1391         int retval;
1392
1393         LOG_DEBUG("-");
1394
1395         type = strtoul(packet + 1, &separator, 16);
1396
1397         if (type == 0)  /* memory breakpoint */
1398                 bp_type = BKPT_SOFT;
1399         else if (type == 1) /* hardware breakpoint */
1400                 bp_type = BKPT_HARD;
1401         else if (type == 2) /* write watchpoint */
1402                 wp_type = WPT_WRITE;
1403         else if (type == 3) /* read watchpoint */
1404                 wp_type = WPT_READ;
1405         else if (type == 4) /* access watchpoint */
1406                 wp_type = WPT_ACCESS;
1407
1408         if (gdb_breakpoint_override && ((bp_type == BKPT_SOFT)||(bp_type == BKPT_HARD)))
1409         {
1410                 bp_type = gdb_breakpoint_override_type;
1411         }
1412
1413         if (*separator != ',')
1414         {
1415                 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1416                 return ERROR_SERVER_REMOTE_CLOSED;
1417         }
1418
1419         address = strtoul(separator + 1, &separator, 16);
1420
1421         if (*separator != ',')
1422         {
1423                 LOG_ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1424                 return ERROR_SERVER_REMOTE_CLOSED;
1425         }
1426
1427         size = strtoul(separator + 1, &separator, 16);
1428
1429         switch (type)
1430         {
1431                 case 0:
1432                 case 1:
1433                         if (packet[0] == 'Z')
1434                         {
1435                                 if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
1436                                 {
1437                                         if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1438                                                 return retval;
1439                                 }
1440                                 else
1441                                 {
1442                                         gdb_put_packet(connection, "OK", 2);
1443                                 }
1444                         }
1445                         else
1446                         {
1447                                 breakpoint_remove(target, address);
1448                                 gdb_put_packet(connection, "OK", 2);
1449                         }
1450                         break;
1451                 case 2:
1452                 case 3:
1453                 case 4:
1454                 {
1455                         if (packet[0] == 'Z')
1456                         {
1457                                 if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
1458                                 {
1459                                         if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1460                                                 return retval;
1461                                 }
1462                                 else
1463                                 {
1464                                         gdb_put_packet(connection, "OK", 2);
1465                                 }
1466                         }
1467                         else
1468                         {
1469                                 watchpoint_remove(target, address);
1470                                 gdb_put_packet(connection, "OK", 2);
1471                         }
1472                         break;
1473                 }
1474                 default:
1475                         break;
1476         }
1477
1478         return ERROR_OK;
1479 }
1480
1481 /* print out a string and allocate more space as needed, mainly used for XML at this point */
1482 void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, ...)
1483 {
1484         if (*retval != ERROR_OK)
1485         {
1486                 return;
1487         }
1488         int first = 1;
1489
1490         for (;;)
1491         {
1492                 if ((*xml == NULL) || (!first))
1493                 {
1494                         /* start by 0 to exercise all the code paths.
1495                          * Need minimum 2 bytes to fit 1 char and 0 terminator. */
1496
1497                         *size = *size * 2 + 2;
1498                         char *t = *xml;
1499                         *xml = realloc(*xml, *size);
1500                         if (*xml == NULL)
1501                         {
1502                                 if (t)
1503                                         free(t);
1504                                 *retval = ERROR_SERVER_REMOTE_CLOSED;
1505                                 return;
1506                         }
1507                 }
1508
1509                 va_list ap;
1510                 int ret;
1511                 va_start(ap, fmt);
1512                 ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
1513                 va_end(ap);
1514                 if ((ret > 0) && ((ret + 1) < *size - *pos))
1515                 {
1516                         *pos += ret;
1517                         return;
1518                 }
1519                 /* there was just enough or not enough space, allocate more. */
1520                 first = 0;
1521         }
1522 }
1523
1524 static int decode_xfer_read(char *buf, char **annex, int *ofs, unsigned int *len)
1525 {
1526         char *separator;
1527
1528         /* Extract and NUL-terminate the annex. */
1529         *annex = buf;
1530         while (*buf && *buf != ':')
1531                 buf++;
1532         if (*buf == '\0')
1533                 return -1;
1534         *buf++ = 0;
1535
1536         /* After the read marker and annex, qXfer looks like a
1537          * traditional 'm' packet. */
1538
1539         *ofs = strtoul(buf, &separator, 16);
1540
1541         if (*separator != ',')
1542                 return -1;
1543
1544         *len = strtoul(separator + 1, NULL, 16);
1545
1546         return 0;
1547 }
1548
1549 int gdb_calc_blocksize(flash_bank_t *bank)
1550 {
1551         uint32_t i;
1552         uint32_t block_size = 0xffffffff;
1553
1554         /* loop through all sectors and return smallest sector size */
1555
1556         for (i = 0; i < (uint32_t)bank->num_sectors; i++)
1557         {
1558                 if (bank->sectors[i].size < block_size)
1559                         block_size = bank->sectors[i].size;
1560         }
1561
1562         return block_size;
1563 }
1564
1565 static int compare_bank (const void * a, const void * b)
1566 {
1567         flash_bank_t *b1, *b2;
1568         b1=*((flash_bank_t **)a);
1569         b2=*((flash_bank_t **)b);
1570
1571         if (b1->base == b2->base)
1572         {
1573                 return 0;
1574         } else if (b1->base > b2->base)
1575         {
1576                 return 1;
1577         } else
1578         {
1579                 return -1;
1580         }
1581 }
1582
1583 int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1584 {
1585         command_context_t *cmd_ctx = connection->cmd_ctx;
1586         gdb_connection_t *gdb_connection = connection->priv;
1587
1588         if (strstr(packet, "qRcmd,"))
1589         {
1590                 if (packet_size > 6)
1591                 {
1592                         char *cmd;
1593                         int i;
1594                         cmd = malloc((packet_size - 6)/2 + 1);
1595                         for (i = 0; i < (packet_size - 6)/2; i++)
1596                         {
1597                                 uint32_t tmp;
1598                                 sscanf(packet + 6 + 2*i, "%2" SCNx32 , &tmp);
1599                                 cmd[i] = tmp;
1600                         }
1601                         cmd[(packet_size - 6)/2] = 0x0;
1602
1603                         /* We want to print all debug output to GDB connection */
1604                         log_add_callback(gdb_log_callback, connection);
1605                         target_call_timer_callbacks_now();
1606                         command_run_line(cmd_ctx, cmd);
1607                         target_call_timer_callbacks_now();
1608                         log_remove_callback(gdb_log_callback, connection);
1609                         free(cmd);
1610                 }
1611                 gdb_put_packet(connection, "OK", 2);
1612                 return ERROR_OK;
1613         }
1614         else if (strstr(packet, "qCRC:"))
1615         {
1616                 if (packet_size > 5)
1617                 {
1618                         int retval;
1619                         char gdb_reply[10];
1620                         char *separator;
1621                         uint32_t checksum;
1622                         uint32_t addr = 0;
1623                         uint32_t len = 0;
1624
1625                         /* skip command character */
1626                         packet += 5;
1627
1628                         addr = strtoul(packet, &separator, 16);
1629
1630                         if (*separator != ',')
1631                         {
1632                                 LOG_ERROR("incomplete read memory packet received, dropping connection");
1633                                 return ERROR_SERVER_REMOTE_CLOSED;
1634                         }
1635
1636                         len = strtoul(separator + 1, NULL, 16);
1637
1638                         retval = target_checksum_memory(target, addr, len, &checksum);
1639
1640                         if (retval == ERROR_OK)
1641                         {
1642                                 snprintf(gdb_reply, 10, "C%8.8" PRIx32 "", checksum);
1643                                 gdb_put_packet(connection, gdb_reply, 9);
1644                         }
1645                         else
1646                         {
1647                                 if ((retval = gdb_error(connection, retval)) != ERROR_OK)
1648                                         return retval;
1649                         }
1650
1651                         return ERROR_OK;
1652                 }
1653         }
1654         else if (strstr(packet, "qSupported"))
1655         {
1656                 /* we currently support packet size and qXfer:memory-map:read (if enabled)
1657                  * disable qXfer:features:read for the moment */
1658                 int retval = ERROR_OK;
1659                 char *buffer = NULL;
1660                 int pos = 0;
1661                 int size = 0;
1662
1663                 xml_printf(&retval, &buffer, &pos, &size,
1664                                 "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-;QStartNoAckMode+",
1665                                 (GDB_BUFFER_SIZE - 1), ((gdb_use_memory_map == 1) && (flash_get_bank_count() > 0)) ? '+' : '-');
1666
1667                 if (retval != ERROR_OK)
1668                 {
1669                         gdb_send_error(connection, 01);
1670                         return ERROR_OK;
1671                 }
1672
1673                 gdb_put_packet(connection, buffer, strlen(buffer));
1674                 free(buffer);
1675
1676                 return ERROR_OK;
1677         }
1678         else if (strstr(packet, "qXfer:memory-map:read::") && (flash_get_bank_count() > 0))
1679         {
1680                 /* We get away with only specifying flash here. Regions that are not
1681                  * specified are treated as if we provided no memory map(if not we
1682                  * could detect the holes and mark them as RAM).
1683                  * Normally we only execute this code once, but no big deal if we
1684                  * have to regenerate it a couple of times. */
1685
1686                 flash_bank_t *p;
1687                 char *xml = NULL;
1688                 int size = 0;
1689                 int pos = 0;
1690                 int retval = ERROR_OK;
1691
1692                 int offset;
1693                 int length;
1694                 char *separator;
1695                 int blocksize;
1696
1697                 /* skip command character */
1698                 packet += 23;
1699
1700                 offset = strtoul(packet, &separator, 16);
1701                 length = strtoul(separator + 1, &separator, 16);
1702
1703                 xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
1704
1705                 /*
1706                 sort banks in ascending order, we need to make non-flash memory be ram(or rather
1707                 read/write) by default for GDB.
1708                 GDB does not have a concept of non-cacheable read/write memory.
1709                  */
1710                 flash_bank_t **banks = malloc(sizeof(flash_bank_t *)*flash_get_bank_count());
1711                 int i;
1712
1713                 for (i = 0; i < flash_get_bank_count(); i++)
1714                 {
1715                         p = get_flash_bank_by_num(i);
1716                         if (p == NULL)
1717                         {
1718                                 free(banks);
1719                                 retval = ERROR_FAIL;
1720                                 gdb_send_error(connection, retval);
1721                                 return retval;
1722                         }
1723                         banks[i]=p;
1724                 }
1725
1726                 qsort(banks, flash_get_bank_count(), sizeof(flash_bank_t *), compare_bank);
1727
1728                 uint32_t ram_start = 0;
1729                 for (i = 0; i < flash_get_bank_count(); i++)
1730                 {
1731                         p = banks[i];
1732
1733                         if (ram_start < p->base)
1734                         {
1735                                 xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
1736                                         ram_start, p->base-ram_start);
1737                         }
1738
1739                         /* if device has uneven sector sizes, eg. str7, lpc
1740                          * we pass the smallest sector size to gdb memory map */
1741                         blocksize = gdb_calc_blocksize(p);
1742
1743                         xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" start=\"0x%x\" length=\"0x%x\">\n" \
1744                                 "<property name=\"blocksize\">0x%x</property>\n" \
1745                                 "</memory>\n", \
1746                                 p->base, p->size, blocksize);
1747                         ram_start = p->base + p->size;
1748                 }
1749                 if (ram_start != 0)
1750                 {
1751                         xml_printf(&retval, &xml, &pos, &size, "<memory type=\"ram\" start=\"0x%x\" length=\"0x%x\"/>\n",
1752                                 ram_start, 0-ram_start);
1753                 } else
1754                 {
1755                         /* a flash chip could be at the very end of the 32 bit address space, in which case
1756                         ram_start will be precisely 0 */
1757                 }
1758
1759                 free(banks);
1760                 banks = NULL;
1761
1762                 xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
1763
1764                 if (retval != ERROR_OK)
1765                 {
1766                         gdb_send_error(connection, retval);
1767                         return retval;
1768                 }
1769
1770                 if (offset + length > pos)
1771                 {
1772                         length = pos - offset;
1773                 }
1774
1775                 char *t = malloc(length + 1);
1776                 t[0] = 'l';
1777                 memcpy(t + 1, xml + offset, length);
1778                 gdb_put_packet(connection, t, length + 1);
1779
1780                 free(t);
1781                 free(xml);
1782                 return ERROR_OK;
1783         }
1784         else if (strstr(packet, "qXfer:features:read:"))
1785         {
1786                 char *xml = NULL;
1787                 int size = 0;
1788                 int pos = 0;
1789                 int retval = ERROR_OK;
1790
1791                 int offset;
1792                 unsigned int length;
1793                 char *annex;
1794
1795                 /* skip command character */
1796                 packet += 20;
1797
1798                 if (decode_xfer_read(packet, &annex, &offset, &length) < 0)
1799                 {
1800                         gdb_send_error(connection, 01);
1801                         return ERROR_OK;
1802                 }
1803
1804                 if (strcmp(annex, "target.xml") != 0)
1805                 {
1806                         gdb_send_error(connection, 01);
1807                         return ERROR_OK;
1808                 }
1809
1810                 xml_printf(&retval, &xml, &pos, &size, \
1811                         "l < target version=\"1.0\">\n < architecture > arm</architecture>\n</target>\n");
1812
1813                 if (retval != ERROR_OK)
1814                 {
1815                         gdb_send_error(connection, retval);
1816                         return retval;
1817                 }
1818
1819                 gdb_put_packet(connection, xml, strlen(xml));
1820
1821                 free(xml);
1822                 return ERROR_OK;
1823         }
1824         else if (strstr(packet, "QStartNoAckMode"))
1825         {
1826                 gdb_connection->noack_mode = 1;
1827                 gdb_put_packet(connection, "OK", 2);
1828                 return ERROR_OK;
1829         }
1830
1831         gdb_put_packet(connection, "", 0);
1832         return ERROR_OK;
1833 }
1834
1835 int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1836 {
1837         gdb_connection_t *gdb_connection = connection->priv;
1838         gdb_service_t *gdb_service = connection->service->priv;
1839         int result;
1840
1841         /* if flash programming disabled - send a empty reply */
1842
1843         if (gdb_flash_program == 0)
1844         {
1845                 gdb_put_packet(connection, "", 0);
1846                 return ERROR_OK;
1847         }
1848
1849         if (strstr(packet, "vFlashErase:"))
1850         {
1851                 unsigned long addr;
1852                 unsigned long length;
1853
1854                 char *parse = packet + 12;
1855                 if (*parse == '\0')
1856                 {
1857                         LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1858                         return ERROR_SERVER_REMOTE_CLOSED;
1859                 }
1860
1861                 addr = strtoul(parse, &parse, 16);
1862
1863                 if (*(parse++) != ',' || *parse == '\0')
1864                 {
1865                         LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1866                         return ERROR_SERVER_REMOTE_CLOSED;
1867                 }
1868
1869                 length = strtoul(parse, &parse, 16);
1870
1871                 if (*parse != '\0')
1872                 {
1873                         LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1874                         return ERROR_SERVER_REMOTE_CLOSED;
1875                 }
1876
1877                 /* assume all sectors need erasing - stops any problems
1878                  * when flash_write is called multiple times */
1879                 flash_set_dirty();
1880
1881                 /* perform any target specific operations before the erase */
1882                 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_START);
1883                 result = flash_erase_address_range(gdb_service->target, addr, length);
1884                 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_END);
1885
1886                 /* perform erase */
1887                 if (result != ERROR_OK)
1888                 {
1889                         /* GDB doesn't evaluate the actual error number returned,
1890                          * treat a failed erase as an I/O error
1891                          */
1892                         gdb_send_error(connection, EIO);
1893                         LOG_ERROR("flash_erase returned %i", result);
1894                 }
1895                 else
1896                         gdb_put_packet(connection, "OK", 2);
1897
1898                 return ERROR_OK;
1899         }
1900
1901         if (strstr(packet, "vFlashWrite:"))
1902         {
1903                 int retval;
1904                 unsigned long addr;
1905                 unsigned long length;
1906                 char *parse = packet + 12;
1907
1908                 if (*parse == '\0')
1909                 {
1910                         LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1911                         return ERROR_SERVER_REMOTE_CLOSED;
1912                 }
1913                 addr = strtoul(parse, &parse, 16);
1914                 if (*(parse++) != ':')
1915                 {
1916                         LOG_ERROR("incomplete vFlashErase packet received, dropping connection");
1917                         return ERROR_SERVER_REMOTE_CLOSED;
1918                 }
1919                 length = packet_size - (parse - packet);
1920
1921                 /* create a new image if there isn't already one */
1922                 if (gdb_connection->vflash_image == NULL)
1923                 {
1924                         gdb_connection->vflash_image = malloc(sizeof(image_t));
1925                         image_open(gdb_connection->vflash_image, "", "build");
1926                 }
1927
1928                 /* create new section with content from packet buffer */
1929                 if ((retval = image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (uint8_t*)parse)) != ERROR_OK)
1930                 {
1931                         return retval;
1932                 }
1933
1934                 gdb_put_packet(connection, "OK", 2);
1935
1936                 return ERROR_OK;
1937         }
1938
1939         if (!strcmp(packet, "vFlashDone"))
1940         {
1941                 uint32_t written;
1942
1943                 /* process the flashing buffer. No need to erase as GDB
1944                  * always issues a vFlashErase first. */
1945                 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_START);
1946                 result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, 0);
1947                 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_WRITE_END);
1948                 if (result != ERROR_OK)
1949                 {
1950                         if (result == ERROR_FLASH_DST_OUT_OF_BANK)
1951                                 gdb_put_packet(connection, "E.memtype", 9);
1952                         else
1953                                 gdb_send_error(connection, EIO);
1954                         }
1955                 else
1956                 {
1957                         LOG_DEBUG("wrote %u bytes from vFlash image to flash", (unsigned)written);
1958                         gdb_put_packet(connection, "OK", 2);
1959                 }
1960
1961                 image_close(gdb_connection->vflash_image);
1962                 free(gdb_connection->vflash_image);
1963                 gdb_connection->vflash_image = NULL;
1964
1965                 return ERROR_OK;
1966         }
1967
1968         gdb_put_packet(connection, "", 0);
1969         return ERROR_OK;
1970 }
1971
1972 int gdb_detach(connection_t *connection, target_t *target)
1973 {
1974
1975         switch (detach_mode)
1976         {
1977                 case GDB_DETACH_RESUME:
1978                         target_handle_event(target, TARGET_EVENT_OLD_pre_resume);
1979                         target_resume(target, 1, 0, 1, 0);
1980                         break;
1981
1982                 case GDB_DETACH_RESET:
1983                         /* FIX?? make this configurable?? */
1984                         target_process_reset(connection->cmd_ctx, RESET_HALT);
1985                         break;
1986
1987                 case GDB_DETACH_HALT:
1988                         target_halt(target);
1989                         break;
1990
1991                 case GDB_DETACH_NOTHING:
1992                         break;
1993         }
1994
1995         gdb_put_packet(connection, "OK", 2);
1996         return ERROR_OK;
1997 }
1998
1999 static void gdb_log_callback(void *priv, const char *file, int line,
2000                 const char *function, const char *string)
2001 {
2002         connection_t *connection = priv;
2003         gdb_connection_t *gdb_con = connection->priv;
2004
2005         if (gdb_con->busy)
2006         {
2007                 /* do not reply this using the O packet */
2008                 return;
2009         }
2010
2011         gdb_output_con(connection, string);
2012 }
2013
2014 /* Do not allocate this on the stack */
2015 char gdb_packet_buffer[GDB_BUFFER_SIZE];
2016
2017 static void gdb_sig_halted(connection_t *connection)
2018 {
2019         char sig_reply[4];
2020         snprintf(sig_reply, 4, "T%2.2x", 2);
2021         gdb_put_packet(connection, sig_reply, 3);
2022
2023 }
2024
2025 int gdb_input_inner(connection_t *connection)
2026 {
2027         gdb_service_t *gdb_service = connection->service->priv;
2028         target_t *target = gdb_service->target;
2029         char *packet = gdb_packet_buffer;
2030         int packet_size;
2031         int retval;
2032         gdb_connection_t *gdb_con = connection->priv;
2033         static int extended_protocol = 0;
2034
2035         /* drain input buffer */
2036         do
2037         {
2038                 packet_size = GDB_BUFFER_SIZE-1;
2039                 if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)
2040                 {
2041                         return retval;
2042                 }
2043
2044                 /* terminate with zero */
2045                 packet[packet_size] = 0;
2046
2047                 if (LOG_LEVEL_IS(LOG_LVL_DEBUG)) {
2048                         if (packet[0] == 'X') {
2049                                 // binary packets spew junk into the debug log stream
2050                                 char buf[ 50 ];
2051                                 int x;
2052                                 for (x = 0 ; (x < 49) && (packet[x] != ':') ; x++) {
2053                                         buf[x] = packet[x];
2054                                 }
2055                                 buf[x] = 0;
2056                                 LOG_DEBUG("received packet: '%s:<binary-data>'", buf);
2057                         } else {
2058                                 LOG_DEBUG("received packet: '%s'", packet);
2059                         }
2060                 }
2061
2062                 if (packet_size > 0)
2063                 {
2064                         retval = ERROR_OK;
2065                         switch (packet[0])
2066                         {
2067                                 case 'H':
2068                                         /* Hct... -- set thread
2069                                          * we don't have threads, send empty reply */
2070                                         gdb_put_packet(connection, NULL, 0);
2071                                         break;
2072                                 case 'q':
2073                                 case 'Q':
2074                                         retval = gdb_query_packet(connection, target, packet, packet_size);
2075                                         break;
2076                                 case 'g':
2077                                         retval = gdb_get_registers_packet(connection, target, packet, packet_size);
2078                                         break;
2079                                 case 'G':
2080                                         retval = gdb_set_registers_packet(connection, target, packet, packet_size);
2081                                         break;
2082                                 case 'p':
2083                                         retval = gdb_get_register_packet(connection, target, packet, packet_size);
2084                                         break;
2085                                 case 'P':
2086                                         retval = gdb_set_register_packet(connection, target, packet, packet_size);
2087                                         break;
2088                                 case 'm':
2089                                         retval = gdb_read_memory_packet(connection, target, packet, packet_size);
2090                                         break;
2091                                 case 'M':
2092                                         retval = gdb_write_memory_packet(connection, target, packet, packet_size);
2093                                         break;
2094                                 case 'z':
2095                                 case 'Z':
2096                                         retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
2097                                         break;
2098                                 case '?':
2099                                         gdb_last_signal_packet(connection, target, packet, packet_size);
2100                                         break;
2101                                 case 'c':
2102                                 case 's':
2103                                         {
2104                                                 if (target->state != TARGET_HALTED)
2105                                                 {
2106                                                         /* If the target isn't in the halted state, then we can't
2107                                                          * step/continue. This might be early setup, etc.
2108                                                          */
2109                                                         gdb_sig_halted(connection);
2110                                                 } else
2111                                                 {
2112                                                         /* We're running/stepping, in which case we can
2113                                                          * forward log output until the target is halted
2114                                                          */
2115                                                         gdb_connection_t *gdb_con = connection->priv;
2116                                                         gdb_con->frontend_state = TARGET_RUNNING;
2117                                                         log_add_callback(gdb_log_callback, connection);
2118                                                         target_call_event_callbacks(target, TARGET_EVENT_GDB_START);
2119                                                         int retval = gdb_step_continue_packet(connection, target, packet, packet_size);
2120                                                         if (retval != ERROR_OK)
2121                                                         {
2122                                                                 /* we'll never receive a halted condition... issue a false one.. */
2123                                                                 gdb_frontend_halted(target, connection);
2124                                                         }
2125                                                 }
2126                                         }
2127                                         break;
2128                                 case 'v':
2129                                         retval = gdb_v_packet(connection, target, packet, packet_size);
2130                                         break;
2131                                 case 'D':
2132                                         retval = gdb_detach(connection, target);
2133                                         extended_protocol = 0;
2134                                         break;
2135                                 case 'X':
2136                                         if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)
2137                                                 return retval;
2138                                         break;
2139                                 case 'k':
2140                                         if (extended_protocol != 0)
2141                                                 break;
2142                                         gdb_put_packet(connection, "OK", 2);
2143                                         return ERROR_SERVER_REMOTE_CLOSED;
2144                                 case '!':
2145                                         /* handle extended remote protocol */
2146                                         extended_protocol = 1;
2147                                         gdb_put_packet(connection, "OK", 2);
2148                                         break;
2149                                 case 'R':
2150                                         /* handle extended restart packet */
2151                                         breakpoint_clear_target(gdb_service->target);
2152                                         watchpoint_clear_target(gdb_service->target);
2153                                         command_run_linef(connection->cmd_ctx, "ocd_gdb_restart %d", get_num_by_target(target));
2154                                         break;
2155                                 default:
2156                                         /* ignore unkown packets */
2157                                         LOG_DEBUG("ignoring 0x%2.2x packet", packet[0]);
2158                                         gdb_put_packet(connection, NULL, 0);
2159                                         break;
2160                         }
2161
2162                         /* if a packet handler returned an error, exit input loop */
2163                         if (retval != ERROR_OK)
2164                                 return retval;
2165                 }
2166
2167                 if (gdb_con->ctrl_c)
2168                 {
2169                         if (target->state == TARGET_RUNNING)
2170                         {
2171                                 target_halt(target);
2172                                 gdb_con->ctrl_c = 0;
2173                         }
2174                 }
2175
2176         } while (gdb_con->buf_cnt > 0);
2177
2178         return ERROR_OK;
2179 }
2180
2181 int gdb_input(connection_t *connection)
2182 {
2183         int retval = gdb_input_inner(connection);
2184         gdb_connection_t *gdb_con = connection->priv;
2185         if (retval == ERROR_SERVER_REMOTE_CLOSED)
2186                 return retval;
2187
2188         /* logging does not propagate the error, yet can set the gdb_con->closed flag */
2189         if (gdb_con->closed)
2190                 return ERROR_SERVER_REMOTE_CLOSED;
2191
2192         /* we'll recover from any other errors(e.g. temporary timeouts, etc.) */
2193         return ERROR_OK;
2194 }
2195
2196 int gdb_init(void)
2197 {
2198         gdb_service_t *gdb_service;
2199         target_t *target = all_targets;
2200
2201         if (!target)
2202         {
2203                 LOG_WARNING("no gdb ports allocated as no target has been specified");
2204                 return ERROR_OK;
2205         }
2206
2207         if (gdb_port == 0 && server_use_pipes == 0)
2208         {
2209                 LOG_INFO("gdb port disabled");
2210                 return ERROR_OK;
2211         }
2212
2213         if (server_use_pipes)
2214         {
2215                 /* only a single gdb connection when using a pipe */
2216
2217                 gdb_service = malloc(sizeof(gdb_service_t));
2218                 gdb_service->target = target;
2219
2220                 add_service("gdb", CONNECTION_PIPE, 0, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
2221
2222                 LOG_DEBUG("gdb service for target %s using pipes",
2223                                 target_get_name(target));
2224         }
2225         else
2226         {
2227                 while (target)
2228                 {
2229                         gdb_service = malloc(sizeof(gdb_service_t));
2230                         gdb_service->target = target;
2231
2232                         add_service("gdb", CONNECTION_TCP, gdb_port + target->target_number, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
2233
2234                         LOG_DEBUG("gdb service for target %s at port %i",
2235                                         target_get_name(target),
2236                                         gdb_port + target->target_number);
2237                         target = target->next;
2238                 }
2239         }
2240
2241         return ERROR_OK;
2242 }
2243
2244 /* daemon configuration command gdb_port */
2245 int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2246 {
2247         if (argc == 0)
2248         {
2249                 command_print(cmd_ctx, "%d", gdb_port);
2250                 return ERROR_OK;
2251         }
2252
2253         gdb_port = strtoul(args[0], NULL, 0);
2254
2255         return ERROR_OK;
2256 }
2257
2258 int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2259 {
2260         if (argc == 1)
2261         {
2262                 if (strcmp(args[0], "resume") == 0)
2263                 {
2264                         detach_mode = GDB_DETACH_RESUME;
2265                         return ERROR_OK;
2266                 }
2267                 else if (strcmp(args[0], "reset") == 0)
2268                 {
2269                         detach_mode = GDB_DETACH_RESET;
2270                         return ERROR_OK;
2271                 }
2272                 else if (strcmp(args[0], "halt") == 0)
2273                 {
2274                         detach_mode = GDB_DETACH_HALT;
2275                         return ERROR_OK;
2276                 }
2277                 else if (strcmp(args[0], "nothing") == 0)
2278                 {
2279                         detach_mode = GDB_DETACH_NOTHING;
2280                         return ERROR_OK;
2281                 }
2282                 else
2283                         LOG_WARNING("invalid gdb_detach configuration directive: %s", args[0]);
2284         }
2285
2286         return ERROR_COMMAND_SYNTAX_ERROR;
2287 }
2288
2289 int handle_gdb_memory_map_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2290 {
2291         if (argc == 1)
2292         {
2293                 if (strcmp(args[0], "enable") == 0)
2294                 {
2295                         gdb_use_memory_map = 1;
2296                         return ERROR_OK;
2297                 }
2298                 else if (strcmp(args[0], "disable") == 0)
2299                 {
2300                         gdb_use_memory_map = 0;
2301                         return ERROR_OK;
2302                 }
2303                 else
2304                         LOG_WARNING("invalid gdb_memory_map configuration directive %s", args[0]);
2305         }
2306
2307         return ERROR_COMMAND_SYNTAX_ERROR;
2308 }
2309
2310 int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2311 {
2312         if (argc == 1)
2313         {
2314                 if (strcmp(args[0], "enable") == 0)
2315                 {
2316                         gdb_flash_program = 1;
2317                         return ERROR_OK;
2318                 }
2319                 else if (strcmp(args[0], "disable") == 0)
2320                 {
2321                         gdb_flash_program = 0;
2322                         return ERROR_OK;
2323                 }
2324                 else
2325                         LOG_WARNING("invalid gdb_flash_program configuration directive: %s", args[0]);
2326         }
2327
2328         return ERROR_COMMAND_SYNTAX_ERROR;
2329 }
2330
2331 int handle_gdb_report_data_abort_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2332 {
2333         if (argc == 1)
2334         {
2335                 if (strcmp(args[0], "enable") == 0)
2336                 {
2337                         gdb_report_data_abort = 1;
2338                         return ERROR_OK;
2339                 }
2340                 else if (strcmp(args[0], "disable") == 0)
2341                 {
2342                         gdb_report_data_abort = 0;
2343                         return ERROR_OK;
2344                 }
2345                 else
2346                         LOG_WARNING("invalid gdb_report_data_abort configuration directive: %s", args[0]);
2347         }
2348
2349         return ERROR_COMMAND_SYNTAX_ERROR;
2350 }
2351
2352 /* gdb_breakpoint_override */
2353 int handle_gdb_breakpoint_override_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
2354 {
2355         if (argc == 0)
2356         {
2357
2358         } else if (argc == 1)
2359         {
2360                 gdb_breakpoint_override = 1;
2361                 if (strcmp(args[0], "hard") == 0)
2362                 {
2363                         gdb_breakpoint_override_type = BKPT_HARD;
2364                 } else if (strcmp(args[0], "soft") == 0)
2365                 {
2366                         gdb_breakpoint_override_type = BKPT_SOFT;
2367                 } else if (strcmp(args[0], "disable") == 0)
2368                 {
2369                         gdb_breakpoint_override = 0;
2370                 }
2371         } else
2372         {
2373                 return ERROR_COMMAND_SYNTAX_ERROR;
2374         }
2375         if (gdb_breakpoint_override)
2376         {
2377                 LOG_USER("force %s breakpoints", (gdb_breakpoint_override_type == BKPT_HARD)?"hard":"soft");
2378         } else
2379         {
2380                 LOG_USER("breakpoint type is not overriden");
2381         }
2382
2383         return ERROR_OK;
2384 }
2385
2386 int gdb_register_commands(command_context_t *command_context)
2387 {
2388         register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
2389                         COMMAND_ANY, "daemon configuration command gdb_port");
2390         register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,
2391                         COMMAND_CONFIG, "resume/reset/halt/nothing - "
2392                         "specify behavior when GDB detaches from the target");
2393         register_command(command_context, NULL, "gdb_memory_map", handle_gdb_memory_map_command,
2394                         COMMAND_CONFIG, "enable or disable memory map");
2395         register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,
2396                         COMMAND_CONFIG, "enable or disable flash program");
2397         register_command(command_context, NULL, "gdb_report_data_abort", handle_gdb_report_data_abort_command,
2398                         COMMAND_CONFIG, "enable or disable reporting data aborts");
2399         register_command(command_context, NULL, "gdb_breakpoint_override", handle_gdb_breakpoint_override_command,
2400                         COMMAND_EXEC, "hard/soft/disable - force breakpoint type for gdb 'break' commands.");
2401         return ERROR_OK;
2402 }