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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "replacements.h"
  25
  26 #include "gdb_server.h"
  27
  28 #include "server.h"
  29 #include "log.h"
  30 #include "binarybuffer.h"
  31 #include "jtag.h"
  32 #include "breakpoints.h"
  33 #include "flash.h"
  34 #include "target_request.h"
  35
  36 #include <string.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39 #include <stdlib.h>
  40
  41 #if 0
  42 #define _DEBUG_GDB_IO_
  43 #endif
  44
  45 static unsigned short gdb_port;
  46
  47 enum gdb_detach_mode
  48 {
  49         GDB_DETACH_RESUME,
  50         GDB_DETACH_RESET,
  51         GDB_DETACH_HALT,
  52         GDB_DETACH_NOTHING
  53 };
  54
  55 /* target behaviour on gdb detach */
  56 enum gdb_detach_mode detach_mode = GDB_DETACH_RESUME;
  57
  58 /* set if we are sending a memory map to gdb
  59  * via qXfer:memory-map:read packet */
  60 int gdb_use_memory_map = 0;
  61 int gdb_flash_program = 0;
  62
  63 int gdb_last_signal(target_t *target)
  64 {
  65         switch (target->debug_reason)
  66         {
  67                 case DBG_REASON_DBGRQ:
  68                         return 0x2; /* SIGINT */
  69                 case DBG_REASON_BREAKPOINT:
  70                 case DBG_REASON_WATCHPOINT:
  71                 case DBG_REASON_WPTANDBKPT:
  72                         return 0x05; /* SIGTRAP */
  73                 case DBG_REASON_SINGLESTEP:
  74                         return 0x05; /* SIGTRAP */
  75                 case DBG_REASON_NOTHALTED:
  76                         return 0x0; /* no signal... shouldn't happen */
  77                 default:
  78                         ERROR("BUG: undefined debug reason");
  79                         exit(-1);
  80         }
  81 }
  82
  83 int gdb_get_char(connection_t *connection, int* next_char)
  84 {
  85         gdb_connection_t *gdb_con = connection->priv;
  86
  87 #ifdef _DEBUG_GDB_IO_
  88         char *debug_buffer;
  89 #endif
  90
  91         if (gdb_con->buf_cnt-- > 0)
  92         {
  93                 *next_char = *(gdb_con->buf_p++);
  94                 if (gdb_con->buf_cnt > 0)
  95                         connection->input_pending = 1;
  96                 else
  97                         connection->input_pending = 0;
  98
  99 #ifdef _DEBUG_GDB_IO_
 100                 DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
 101 #endif
 102
 103                 return ERROR_OK;
 104         }
 105
 106         while ((gdb_con->buf_cnt = read_socket(connection->fd, gdb_con->buffer, GDB_BUFFER_SIZE)) <= 0)
 107         {
 108                 if (gdb_con->buf_cnt == 0)
 109                         return ERROR_SERVER_REMOTE_CLOSED;
 110
 111 #ifdef _WIN32
 112                 errno = WSAGetLastError();
 113
 114                 switch(errno)
 115                 {
 116                         case WSAEWOULDBLOCK:
 117                                 usleep(1000);
 118                                 break;
 119                         case WSAECONNABORTED:
 120                                 return ERROR_SERVER_REMOTE_CLOSED;
 121                         case WSAECONNRESET:
 122                                 return ERROR_SERVER_REMOTE_CLOSED;
 123                         default:
 124                                 ERROR("read: %d", errno);
 125                                 exit(-1);
 126                 }
 127 #else
 128                 switch(errno)
 129                 {
 130                         case EAGAIN:
 131                                 usleep(1000);
 132                                 break;
 133                         case ECONNABORTED:
 134                                 return ERROR_SERVER_REMOTE_CLOSED;
 135                         case ECONNRESET:
 136                                 return ERROR_SERVER_REMOTE_CLOSED;
 137                         default:
 138                                 ERROR("read: %s", strerror(errno));
 139                                 exit(-1);
 140                 }
 141 #endif
 142         }
 143
 144 #ifdef _DEBUG_GDB_IO_
 145         debug_buffer = malloc(gdb_con->buf_cnt + 1);
 146         memcpy(debug_buffer, gdb_con->buffer, gdb_con->buf_cnt);
 147         debug_buffer[gdb_con->buf_cnt] = 0;
 148         DEBUG("received '%s'", debug_buffer);
 149         free(debug_buffer);
 150 #endif
 151
 152         gdb_con->buf_p = gdb_con->buffer;
 153         gdb_con->buf_cnt--;
 154         *next_char = *(gdb_con->buf_p++);
 155         if (gdb_con->buf_cnt > 0)
 156                 connection->input_pending = 1;
 157         else
 158                 connection->input_pending = 0;
 159 #ifdef _DEBUG_GDB_IO_
 160         DEBUG("returned char '%c' (0x%2.2x)", *next_char, *next_char);
 161 #endif
 162
 163         return ERROR_OK;
 164 }
 165
 166 int gdb_putback_char(connection_t *connection, int last_char)
 167 {
 168         gdb_connection_t *gdb_con = connection->priv;
 169
 170         if (gdb_con->buf_p > gdb_con->buffer)
 171         {
 172                 *(--gdb_con->buf_p) = last_char;
 173                 gdb_con->buf_cnt++;
 174         }
 175         else
 176         {
 177                 ERROR("BUG: couldn't put character back");
 178         }
 179
 180         return ERROR_OK;
 181 }
 182
 183 int gdb_put_packet(connection_t *connection, char *buffer, int len)
 184 {
 185         int i;
 186         unsigned char my_checksum = 0;
 187         char checksum[3];
 188         char *debug_buffer;
 189         int reply;
 190         int retval;
 191         gdb_connection_t *gdb_con = connection->priv;
 192
 193         for (i = 0; i < len; i++)
 194                 my_checksum += buffer[i];
 195
 196         while (1)
 197         {
 198                 debug_buffer = malloc(len + 1);
 199                 memcpy(debug_buffer, buffer, len);
 200                 debug_buffer[len] = 0;
 201                 DEBUG("sending packet '$%s#%2.2x'", debug_buffer, my_checksum);
 202                 free(debug_buffer);
 203
 204                 write_socket(connection->fd, "$", 1);
 205                 if (len > 0)
 206                         write_socket(connection->fd, buffer, len);
 207                 write_socket(connection->fd, "#", 1);
 208
 209                 snprintf(checksum, 3, "%2.2x", my_checksum);
 210
 211                 write_socket(connection->fd, checksum, 2);
 212
 213                 if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
 214                         return retval;
 215
 216                 if (reply == '+')
 217                         break;
 218                 else if (reply == '-')
 219                         WARNING("negative reply, retrying");
 220                 else if (reply == 0x3)
 221                 {
 222                         gdb_con->ctrl_c = 1;
 223                         if ((retval = gdb_get_char(connection, &reply)) != ERROR_OK)
 224                                 return retval;
 225                         if (reply == '+')
 226                                 break;
 227                         else if (reply == '-')
 228                                 WARNING("negative reply, retrying");
 229                         else
 230                         {
 231                                 ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);
 232                                 return ERROR_SERVER_REMOTE_CLOSED;
 233                         }
 234                 }
 235                 else
 236                 {
 237                         ERROR("unknown character 0x%2.2x in reply, dropping connection", reply);
 238                         return ERROR_SERVER_REMOTE_CLOSED;
 239                 }
 240         }
 241
 242         return ERROR_OK;
 243 }
 244
 245 int gdb_get_packet(connection_t *connection, char *buffer, int *len)
 246 {
 247         int character;
 248         int count = 0;
 249         int retval;
 250         char checksum[3];
 251         unsigned char my_checksum = 0;
 252         gdb_connection_t *gdb_con = connection->priv;
 253
 254         while (1)
 255         {
 256                 do
 257                 {
 258                         if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 259                                 return retval;
 260
 261 #ifdef _DEBUG_GDB_IO_
 262                         DEBUG("character: '%c'", character);
 263 #endif
 264
 265                         switch (character)
 266                         {
 267                                 case '$':
 268                                         break;
 269                                 case '+':
 270                                         WARNING("acknowledgment received, but no packet pending");
 271                                         break;
 272                                 case '-':
 273                                         WARNING("negative acknowledgment, but no packet pending");
 274                                         break;
 275                                 case 0x3:
 276                                         gdb_con->ctrl_c = 1;
 277                                         *len = 0;
 278                                         return ERROR_OK;
 279                                 default:
 280                                         WARNING("ignoring character 0x%x", character);
 281                                         break;
 282                         }
 283                 } while (character != '$');
 284
 285                 my_checksum = 0;
 286
 287                 do
 288                 {
 289                         if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 290                                 return retval;
 291
 292                         if (character == '#') break;
 293
 294                         if (character == '}')
 295                         {
 296                                 /* data transmitted in binary mode (X packet)
 297                                  * uses 0x7d as escape character */
 298                                 my_checksum += character & 0xff;
 299                                 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 300                                         return retval;
 301                                 my_checksum += character & 0xff;
 302                                 buffer[count++] = (character ^ 0x20) & 0xff;
 303                         }
 304                         else
 305                         {
 306                                 my_checksum += character & 0xff;
 307                                 buffer[count++] = character & 0xff;
 308                         }
 309
 310                         if (count > *len)
 311                         {
 312                                 ERROR("packet buffer too small");
 313                                 return ERROR_GDB_BUFFER_TOO_SMALL;
 314                         }
 315                 } while (1);
 316
 317                 *len = count;
 318
 319                 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 320                         return retval;
 321                 checksum[0] = character;
 322                 if ((retval = gdb_get_char(connection, &character)) != ERROR_OK)
 323                         return retval;
 324                 checksum[1] = character;
 325                 checksum[2] = 0;
 326
 327                 if (my_checksum == strtoul(checksum, NULL, 16))
 328                 {
 329                         write_socket(connection->fd, "+", 1);
 330                         break;
 331                 }
 332
 333                 WARNING("checksum error, requesting retransmission");
 334                 write_socket(connection->fd, "-", 1);
 335         }
 336
 337         return ERROR_OK;
 338 }
 339
 340 int gdb_output(struct command_context_s *context, char* line)
 341 {
 342         connection_t *connection = context->output_handler_priv;
 343         gdb_connection_t *gdb_connection = connection->priv;
 344
 345         char *hex_buffer;
 346         int i, bin_size;
 347
 348         /* check if output is enabled */
 349         if (gdb_connection->output_disable)
 350         {
 351                 return ERROR_OK;
 352         }
 353
 354         bin_size = strlen(line);
 355
 356         hex_buffer = malloc(bin_size*2 + 4);
 357
 358         hex_buffer[0] = 'O';
 359         for (i=0; i<bin_size; i++)
 360                 snprintf(hex_buffer + 1 + i*2, 3, "%2.2x", line[i]);
 361         hex_buffer[bin_size*2+1] = '0';
 362         hex_buffer[bin_size*2+2] = 'a';
 363         hex_buffer[bin_size*2+3] = 0x0;
 364
 365         gdb_put_packet(connection, hex_buffer, bin_size*2 + 3);
 366
 367         free(hex_buffer);
 368         return ERROR_OK;
 369 }
 370
 371 int gdb_program_handler(struct target_s *target, enum target_event event, void *priv)
 372 {
 373         FILE *script;
 374         struct command_context_s *cmd_ctx = priv;
 375
 376         if (target->gdb_program_script)
 377         {
 378                 script = fopen(target->gdb_program_script, "r");
 379                 if (!script)
 380                 {
 381                         ERROR("couldn't open script file %s", target->gdb_program_script);
 382                                 return ERROR_OK;
 383                 }
 384
 385                 INFO("executing gdb_program script '%s'", target->gdb_program_script);
 386                 command_run_file(cmd_ctx, script, COMMAND_EXEC);
 387                 fclose(script);
 388
 389                 jtag_execute_queue();
 390         }
 391
 392         return ERROR_OK;
 393 }
 394
 395 int gdb_target_callback_event_handler(struct target_s *target, enum target_event event, void *priv)
 396 {
 397         connection_t *connection = priv;
 398         gdb_connection_t *gdb_connection = connection->priv;
 399         char sig_reply[4];
 400         int signal;
 401
 402         switch (event)
 403         {
 404                 case TARGET_EVENT_HALTED:
 405                         if (gdb_connection->frontend_state == TARGET_RUNNING)
 406                         {
 407                                 if (gdb_connection->ctrl_c)
 408                                 {
 409                                         signal = 0x2;
 410                                         gdb_connection->ctrl_c = 0;
 411                                 }
 412                                 else
 413                                 {
 414                                         signal = gdb_last_signal(target);
 415                                 }
 416
 417                                 snprintf(sig_reply, 4, "T%2.2x", signal);
 418                                 gdb_put_packet(connection, sig_reply, 3);
 419                                 gdb_connection->frontend_state = TARGET_HALTED;
 420                         }
 421                         break;
 422                 case TARGET_EVENT_RESUMED:
 423                         if (gdb_connection->frontend_state == TARGET_HALTED)
 424                         {
 425                                 gdb_connection->frontend_state = TARGET_RUNNING;
 426                         }
 427                         break;
 428                 case TARGET_EVENT_GDB_PROGRAM:
 429                         gdb_program_handler(target, event, connection->cmd_ctx);
 430                         break;
 431                 default:
 432                         break;
 433         }
 434
 435         return ERROR_OK;
 436 }
 437
 438 int gdb_new_connection(connection_t *connection)
 439 {
 440         gdb_connection_t *gdb_connection = malloc(sizeof(gdb_connection_t));
 441         gdb_service_t *gdb_service = connection->service->priv;
 442         int retval;
 443         int initial_ack;
 444
 445         connection->priv = gdb_connection;
 446
 447         /* initialize gdb connection information */
 448         gdb_connection->buf_p = gdb_connection->buffer;
 449         gdb_connection->buf_cnt = 0;
 450         gdb_connection->ctrl_c = 0;
 451         gdb_connection->frontend_state = TARGET_HALTED;
 452         gdb_connection->vflash_image = NULL;
 453         gdb_connection->output_disable = 0;
 454
 455         /* output goes through gdb connection */
 456         command_set_output_handler(connection->cmd_ctx, gdb_output, connection);
 457
 458         /* register callback to be informed about target events */
 459         target_register_event_callback(gdb_target_callback_event_handler, connection);
 460
 461         /* a gdb session just attached, put the target in halt mode */
 462         if (((retval = gdb_service->target->type->halt(gdb_service->target)) != ERROR_OK) &&
 463                         (retval != ERROR_TARGET_ALREADY_HALTED))
 464         {
 465                 ERROR("error when trying to halt target");
 466                 exit(-1);
 467         }
 468
 469         while (gdb_service->target->state != TARGET_HALTED)
 470         {
 471                 gdb_service->target->type->poll(gdb_service->target);
 472         }
 473
 474         /* remove the initial ACK from the incoming buffer */
 475         if ((retval = gdb_get_char(connection, &initial_ack)) != ERROR_OK)
 476                 return retval;
 477
 478         if (initial_ack != '+')
 479                 gdb_putback_char(connection, initial_ack);
 480
 481         return ERROR_OK;
 482 }
 483
 484 int gdb_connection_closed(connection_t *connection)
 485 {
 486         gdb_service_t *gdb_service = connection->service->priv;
 487         gdb_connection_t *gdb_connection = connection->priv;
 488
 489         /* see if an image built with vFlash commands is left */
 490         if (gdb_connection->vflash_image)
 491         {
 492                 image_close(gdb_connection->vflash_image);
 493                 free(gdb_connection->vflash_image);
 494                 gdb_connection->vflash_image = NULL;
 495         }
 496
 497         /* if this connection registered a debug-message receiver delete it */
 498         delete_debug_msg_receiver(connection->cmd_ctx, gdb_service->target);
 499
 500         if (connection->priv)
 501         {
 502                 free(connection->priv);
 503                 connection->priv = NULL;
 504         }
 505         else
 506         {
 507                 ERROR("BUG: connection->priv == NULL");
 508         }
 509
 510         target_unregister_event_callback(gdb_target_callback_event_handler, connection);
 511
 512         return ERROR_OK;
 513 }
 514
 515 void gdb_send_error(connection_t *connection, u8 the_error)
 516 {
 517         char err[4];
 518         snprintf(err, 4, "E%2.2X", the_error );
 519         gdb_put_packet(connection, err, 3);
 520 }
 521
 522 int gdb_last_signal_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
 523 {
 524         char sig_reply[4];
 525         int signal;
 526
 527         signal = gdb_last_signal(target);
 528
 529         snprintf(sig_reply, 4, "S%2.2x", signal);
 530         gdb_put_packet(connection, sig_reply, 3);
 531
 532         return ERROR_OK;
 533 }
 534
 535 void gdb_str_to_target(target_t *target, char *str, char *tstr)
 536 {
 537         int str_len = strlen(str);
 538         int i;
 539
 540         if (str_len % 2)
 541         {
 542                 ERROR("BUG: gdb value with uneven number of characters encountered: %s", str);
 543                 exit(-1);
 544         }
 545
 546         if (target->endianness == TARGET_LITTLE_ENDIAN)
 547         {
 548                 for (i = 0; i < str_len; i+=2)
 549                 {
 550                         tstr[str_len - i - 1] = str[i + 1];
 551                         tstr[str_len - i - 2] = str[i];
 552                 }
 553         }
 554         else
 555         {
 556                 for (i = 0; i < str_len; i++)
 557                 {
 558                         tstr[i] = str[i];
 559                 }
 560         }
 561 }
 562
 563 void gdb_target_to_str(target_t *target, char *tstr, char *str)
 564 {
 565         int str_len = strlen(tstr);
 566         int i;
 567
 568         if (str_len % 2)
 569         {
 570                 ERROR("BUG: gdb value with uneven number of characters encountered");
 571                 exit(-1);
 572         }
 573
 574         if (target->endianness == TARGET_LITTLE_ENDIAN)
 575         {
 576                 for (i = 0; i < str_len; i+=2)
 577                 {
 578                         str[str_len - i - 1] = tstr[i + 1];
 579                         str[str_len - i - 2] = tstr[i];
 580                 }
 581         }
 582         else
 583         {
 584                 for (i = 0; i < str_len; i++)
 585                 {
 586                         str[i] = tstr[i];
 587                 }
 588         }
 589 }
 590
 591 int gdb_get_registers_packet(connection_t *connection, target_t *target, char* packet, int packet_size)
 592 {
 593         reg_t **reg_list;
 594         int reg_list_size;
 595         int retval;
 596         int reg_packet_size = 0;
 597         char *reg_packet;
 598         char *reg_packet_p;
 599         int i;
 600
 601         DEBUG("-");
 602
 603         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 604         {
 605                 switch (retval)
 606                 {
 607                         case ERROR_TARGET_NOT_HALTED:
 608                                 ERROR("gdb requested registers but we're not halted, dropping connection");
 609                                 return ERROR_SERVER_REMOTE_CLOSED;
 610                         default:
 611                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 612                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 613                                 exit(-1);
 614                 }
 615         }
 616
 617         for (i = 0; i < reg_list_size; i++)
 618         {
 619                 reg_packet_size += reg_list[i]->size;
 620         }
 621
 622         reg_packet = malloc(CEIL(reg_packet_size, 8) * 2);
 623         reg_packet_p = reg_packet;
 624
 625         for (i = 0; i < reg_list_size; i++)
 626         {
 627                 char *hex_buf = buf_to_str(reg_list[i]->value, reg_list[i]->size, 16);
 628                 DEBUG("hex_buf: %s", hex_buf);
 629                 gdb_str_to_target(target, hex_buf, reg_packet_p);
 630                 reg_packet_p += CEIL(reg_list[i]->size, 8) * 2;
 631                 free(hex_buf);
 632         }
 633
 634         reg_packet_p = strndup(reg_packet, CEIL(reg_packet_size, 8) * 2);
 635         DEBUG("reg_packet: %s", reg_packet_p);
 636         free(reg_packet_p);
 637
 638         gdb_put_packet(connection, reg_packet, CEIL(reg_packet_size, 8) * 2);
 639         free(reg_packet);
 640
 641         free(reg_list);
 642
 643         return ERROR_OK;
 644 }
 645
 646 int gdb_set_registers_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 647 {
 648         int i;
 649         reg_t **reg_list;
 650         int reg_list_size;
 651         int retval;
 652         char *packet_p;
 653
 654         DEBUG("-");
 655
 656         /* skip command character */
 657         packet++;
 658         packet_size--;
 659
 660         if (packet_size % 2)
 661         {
 662                 WARNING("GDB set_registers packet with uneven characters received, dropping connection");
 663                 return ERROR_SERVER_REMOTE_CLOSED;
 664         }
 665
 666         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 667         {
 668                 switch (retval)
 669                 {
 670                         case ERROR_TARGET_NOT_HALTED:
 671                                 ERROR("gdb tried to registers but we're not halted, dropping connection");
 672                                 return ERROR_SERVER_REMOTE_CLOSED;
 673                         default:
 674                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 675                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 676                                 exit(-1);
 677                 }
 678         }
 679
 680         packet_p = packet;
 681         for (i = 0; i < reg_list_size; i++)
 682         {
 683                 u8 *bin_buf;
 684                 char *hex_buf;
 685                 reg_arch_type_t *arch_type;
 686
 687                 /* convert from GDB-string (target-endian) to hex-string (big-endian) */
 688                 hex_buf = malloc(CEIL(reg_list[i]->size, 8) * 2);
 689                 gdb_target_to_str(target, packet_p, hex_buf);
 690
 691                 /* convert hex-string to binary buffer */
 692                 bin_buf = malloc(CEIL(reg_list[i]->size, 8));
 693                 str_to_buf(hex_buf, CEIL(reg_list[i]->size, 8) * 2, bin_buf, reg_list[i]->size, 16);
 694
 695                 /* get register arch_type, and call set method */
 696                 arch_type = register_get_arch_type(reg_list[i]->arch_type);
 697                 if (arch_type == NULL)
 698                 {
 699                         ERROR("BUG: encountered unregistered arch type");
 700                         exit(-1);
 701                 }
 702                 arch_type->set(reg_list[i], bin_buf);
 703
 704                 /* advance packet pointer */
 705                 packet_p += (CEIL(reg_list[i]->size, 8) * 2);
 706
 707                 free(bin_buf);
 708                 free(hex_buf);
 709         }
 710
 711         /* free reg_t *reg_list[] array allocated by get_gdb_reg_list */
 712         free(reg_list);
 713
 714         gdb_put_packet(connection, "OK", 2);
 715
 716         return ERROR_OK;
 717 }
 718
 719 int gdb_get_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 720 {
 721         char *reg_packet;
 722         int reg_num = strtoul(packet + 1, NULL, 16);
 723         reg_t **reg_list;
 724         int reg_list_size;
 725         int retval;
 726         char *hex_buf;
 727
 728         DEBUG("-");
 729
 730         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 731         {
 732                 switch (retval)
 733                 {
 734                         case ERROR_TARGET_NOT_HALTED:
 735                                 ERROR("gdb requested registers but we're not halted, dropping connection");
 736                                 return ERROR_SERVER_REMOTE_CLOSED;
 737                         default:
 738                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 739                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 740                                 exit(-1);
 741                 }
 742         }
 743
 744         if (reg_list_size <= reg_num)
 745         {
 746                 ERROR("gdb requested a non-existing register");
 747                 exit(-1);
 748         }
 749
 750         reg_packet = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
 751
 752         hex_buf = buf_to_str(reg_list[reg_num]->value, reg_list[reg_num]->size, 16);
 753
 754         gdb_str_to_target(target, hex_buf, reg_packet);
 755
 756         gdb_put_packet(connection, reg_packet, CEIL(reg_list[reg_num]->size, 8) * 2);
 757
 758         free(reg_list);
 759         free(reg_packet);
 760         free(hex_buf);
 761
 762         return ERROR_OK;
 763 }
 764
 765 int gdb_set_register_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 766 {
 767         char *separator;
 768         char *hex_buf;
 769         u8 *bin_buf;
 770         int reg_num = strtoul(packet + 1, &separator, 16);
 771         reg_t **reg_list;
 772         int reg_list_size;
 773         int retval;
 774         reg_arch_type_t *arch_type;
 775
 776         DEBUG("-");
 777
 778         if ((retval = target->type->get_gdb_reg_list(target, &reg_list, &reg_list_size)) != ERROR_OK)
 779         {
 780                 switch (retval)
 781                 {
 782                         case ERROR_TARGET_NOT_HALTED:
 783                                 ERROR("gdb tried to set a register but we're not halted, dropping connection");
 784                                 return ERROR_SERVER_REMOTE_CLOSED;
 785                         default:
 786                                 /* this is a bug condition - get_gdb_reg_list() may not return any other error */
 787                                 ERROR("BUG: unexpected error returned by get_gdb_reg_list()");
 788                                 exit(-1);
 789                 }
 790         }
 791
 792         if (reg_list_size < reg_num)
 793         {
 794                 ERROR("gdb requested a non-existing register");
 795                 return ERROR_SERVER_REMOTE_CLOSED;
 796         }
 797
 798         if (*separator != '=')
 799         {
 800                 ERROR("GDB 'set register packet', but no '=' following the register number");
 801                 return ERROR_SERVER_REMOTE_CLOSED;
 802         }
 803
 804         /* convert from GDB-string (target-endian) to hex-string (big-endian) */
 805         hex_buf = malloc(CEIL(reg_list[reg_num]->size, 8) * 2);
 806         gdb_target_to_str(target, separator + 1, hex_buf);
 807
 808         /* convert hex-string to binary buffer */
 809         bin_buf = malloc(CEIL(reg_list[reg_num]->size, 8));
 810         str_to_buf(hex_buf, CEIL(reg_list[reg_num]->size, 8) * 2, bin_buf, reg_list[reg_num]->size, 16);
 811
 812         /* get register arch_type, and call set method */
 813         arch_type = register_get_arch_type(reg_list[reg_num]->arch_type);
 814         if (arch_type == NULL)
 815         {
 816                 ERROR("BUG: encountered unregistered arch type");
 817                 exit(-1);
 818         }
 819         arch_type->set(reg_list[reg_num], bin_buf);
 820
 821         gdb_put_packet(connection, "OK", 2);
 822
 823         free(bin_buf);
 824         free(hex_buf);
 825         free(reg_list);
 826
 827         return ERROR_OK;
 828 }
 829
 830 int gdb_memory_packet_error(connection_t *connection, int retval)
 831 {
 832         switch (retval)
 833         {
 834                 case ERROR_TARGET_NOT_HALTED:
 835                         ERROR("gdb tried to read memory but we're not halted, dropping connection");
 836                         return ERROR_SERVER_REMOTE_CLOSED;
 837                         break;
 838                 case ERROR_TARGET_DATA_ABORT:
 839                         gdb_send_error(connection, EIO);
 840                         break;
 841                 case ERROR_TARGET_TRANSLATION_FAULT:
 842                         gdb_send_error(connection, EFAULT);
 843                         break;
 844                 case ERROR_TARGET_UNALIGNED_ACCESS:
 845                         gdb_send_error(connection, EFAULT);
 846                         break;
 847                 default:
 848                         ERROR("BUG: unexpected error %i", retval);
 849                         exit(-1);
 850         }
 851
 852         return ERROR_OK;
 853 }
 854
 855 int gdb_read_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 856 {
 857         char *separator;
 858         u32 addr = 0;
 859         u32 len = 0;
 860
 861         u8 *buffer;
 862         char *hex_buffer;
 863
 864         int i;
 865         int retval;
 866
 867         /* skip command character */
 868         packet++;
 869
 870         addr = strtoul(packet, &separator, 16);
 871
 872         if (*separator != ',')
 873         {
 874                 ERROR("incomplete read memory packet received, dropping connection");
 875                 return ERROR_SERVER_REMOTE_CLOSED;
 876         }
 877
 878         len = strtoul(separator+1, NULL, 16);
 879
 880         buffer = malloc(len);
 881
 882         DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
 883
 884         switch (len)
 885         {
 886                 case 4:
 887                         if ((addr % 4) == 0)
 888                                 retval = target->type->read_memory(target, addr, 4, 1, buffer);
 889                         else
 890                                 retval = target->type->read_memory(target, addr, 1, len, buffer);
 891                         break;
 892                 case 2:
 893                         if ((addr % 2) == 0)
 894                                 retval = target->type->read_memory(target, addr, 2, 1, buffer);
 895                         else
 896                                 retval = target->type->read_memory(target, addr, 1, len, buffer);
 897                         break;
 898                 default:
 899                         if (((addr % 4) == 0) && ((len % 4) == 0))
 900                                 retval = target->type->read_memory(target, addr, 4, len / 4, buffer);
 901                         else
 902                                 retval = target->type->read_memory(target, addr, 1, len, buffer);
 903         }
 904
 905         if (retval == ERROR_OK)
 906         {
 907                 hex_buffer = malloc(len * 2 + 1);
 908
 909                 for (i=0; i<len; i++)
 910                         snprintf(hex_buffer + 2*i, 3, "%2.2x", buffer[i]);
 911
 912                 gdb_put_packet(connection, hex_buffer, len * 2);
 913
 914                 free(hex_buffer);
 915         }
 916         else
 917         {
 918                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
 919                         return retval;
 920         }
 921
 922         free(buffer);
 923
 924         return ERROR_OK;
 925 }
 926
 927 int gdb_write_memory_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
 928 {
 929         char *separator;
 930         u32 addr = 0;
 931         u32 len = 0;
 932
 933         u8 *buffer;
 934
 935         int i;
 936         int retval;
 937
 938         /* skip command character */
 939         packet++;
 940
 941         addr = strtoul(packet, &separator, 16);
 942
 943         if (*separator != ',')
 944         {
 945                 ERROR("incomplete write memory packet received, dropping connection");
 946                 return ERROR_SERVER_REMOTE_CLOSED;
 947         }
 948
 949         len = strtoul(separator+1, &separator, 16);
 950
 951         if (*(separator++) != ':')
 952         {
 953                 ERROR("incomplete write memory packet received, dropping connection");
 954                 return ERROR_SERVER_REMOTE_CLOSED;
 955         }
 956
 957         buffer = malloc(len);
 958
 959         DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
 960
 961         for (i=0; i<len; i++)
 962         {
 963                 u32 tmp;
 964                 sscanf(separator + 2*i, "%2x", &tmp);
 965                 buffer[i] = tmp;
 966         }
 967
 968         retval = ERROR_OK;
 969         switch (len)
 970         {
 971                 /* handle sized writes */
 972                 case 4:
 973                         if ((addr % 4) == 0)
 974                                 retval = target->type->write_memory(target, addr, 4, 1, buffer);
 975                         else
 976                                 retval = target->type->write_memory(target, addr, 1, len, buffer);
 977                         break;
 978                 case 2:
 979                         if ((addr % 2) == 0)
 980                                 retval = target->type->write_memory(target, addr, 2, 1, buffer);
 981                         else
 982                                 retval = target->type->write_memory(target, addr, 1, len, buffer);
 983                         break;
 984                 case 3:
 985                 case 1:
 986                         retval = target->type->write_memory(target, addr, 1, len, buffer);
 987                         break;
 988                         /* handle bulk writes */
 989                 default:
 990                         retval = target_write_buffer(target, addr, len, buffer);
 991                         break;
 992         }
 993
 994         if (retval == ERROR_OK)
 995         {
 996                 gdb_put_packet(connection, "OK", 2);
 997         }
 998         else
 999         {
1000                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
1001                         return retval;
1002         }
1003
1004         free(buffer);
1005
1006         return ERROR_OK;
1007 }
1008
1009 int gdb_write_memory_binary_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1010 {
1011         char *separator;
1012         u32 addr = 0;
1013         u32 len = 0;
1014
1015         u8 *buffer;
1016         int retval;
1017
1018         /* skip command character */
1019         packet++;
1020
1021         addr = strtoul(packet, &separator, 16);
1022
1023         if (*separator != ',')
1024         {
1025                 ERROR("incomplete write memory binary packet received, dropping connection");
1026                 return ERROR_SERVER_REMOTE_CLOSED;
1027         }
1028
1029         len = strtoul(separator+1, &separator, 16);
1030
1031         if (*(separator++) != ':')
1032         {
1033                 ERROR("incomplete write memory binary packet received, dropping connection");
1034                 return ERROR_SERVER_REMOTE_CLOSED;
1035         }
1036
1037         retval = ERROR_OK;
1038         if( len ) {
1039
1040                 buffer = malloc(len);
1041
1042                 DEBUG("addr: 0x%8.8x, len: 0x%8.8x", addr, len);
1043
1044                 memcpy( buffer, separator, len );
1045
1046                 switch (len)
1047                 {
1048                         case 4:
1049                                 if ((addr % 4) == 0)
1050                                         retval = target->type->write_memory(target, addr, 4, 1, buffer);
1051                                 else
1052                                         retval = target->type->write_memory(target, addr, 1, len, buffer);
1053                                 break;
1054                         case 2:
1055                                 if ((addr % 2) == 0)
1056                                         retval = target->type->write_memory(target, addr, 2, 1, buffer);
1057                                 else
1058                                         retval = target->type->write_memory(target, addr, 1, len, buffer);
1059                                 break;
1060                         case 3:
1061                         case 1:
1062                                 retval = target->type->write_memory(target, addr, 1, len, buffer);
1063                                 break;
1064                         default:
1065                                 retval = target_write_buffer(target, addr, len, buffer);
1066                                 break;
1067                 }
1068
1069                 free(buffer);
1070         }
1071
1072         if (retval == ERROR_OK)
1073         {
1074                 gdb_put_packet(connection, "OK", 2);
1075         }
1076         else
1077         {
1078                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
1079                         return retval;
1080         }
1081
1082         return ERROR_OK;
1083 }
1084
1085 void gdb_step_continue_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1086 {
1087         int current = 0;
1088         u32 address = 0x0;
1089
1090         DEBUG("-");
1091
1092         if (packet_size > 1)
1093         {
1094                 packet[packet_size] = 0;
1095                 address = strtoul(packet + 1, NULL, 16);
1096         }
1097         else
1098         {
1099                 current = 1;
1100         }
1101
1102         if (packet[0] == 'c')
1103         {
1104                 DEBUG("continue");
1105                 target->type->resume(target, current, address, 0, 0); /* resume at current address, don't handle breakpoints, not debugging */
1106         }
1107         else if (packet[0] == 's')
1108         {
1109                 DEBUG("step");
1110                 target->type->step(target, current, address, 0); /* step at current or address, don't handle breakpoints */
1111         }
1112 }
1113
1114 int gdb_bp_wp_packet_error(connection_t *connection, int retval)
1115 {
1116         switch (retval)
1117         {
1118                 case ERROR_TARGET_NOT_HALTED:
1119                         ERROR("gdb tried to set a breakpoint but we're not halted, dropping connection");
1120                         return ERROR_SERVER_REMOTE_CLOSED;
1121                         break;
1122                 case ERROR_TARGET_RESOURCE_NOT_AVAILABLE:
1123                         gdb_send_error(connection, EBUSY);
1124                         break;
1125                 default:
1126                         ERROR("BUG: unexpected error %i", retval);
1127                         exit(-1);
1128         }
1129
1130         return ERROR_OK;
1131 }
1132
1133 int gdb_breakpoint_watchpoint_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1134 {
1135         int type;
1136         enum breakpoint_type bp_type = BKPT_SOFT /* dummy init to avoid warning */;
1137         enum watchpoint_rw wp_type;
1138         u32 address;
1139         u32 size;
1140         char *separator;
1141         int retval;
1142
1143         DEBUG("-");
1144
1145         type = strtoul(packet + 1, &separator, 16);
1146
1147         if (type == 0)  /* memory breakpoint */
1148                 bp_type = BKPT_SOFT;
1149         else if (type == 1) /* hardware breakpoint */
1150                 bp_type = BKPT_HARD;
1151         else if (type == 2) /* write watchpoint */
1152                 wp_type = WPT_WRITE;
1153         else if (type == 3) /* read watchpoint */
1154                 wp_type = WPT_READ;
1155         else if (type == 4) /* access watchpoint */
1156                 wp_type = WPT_ACCESS;
1157
1158         if (*separator != ',')
1159         {
1160                 ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1161                 return ERROR_SERVER_REMOTE_CLOSED;
1162         }
1163
1164         address = strtoul(separator+1, &separator, 16);
1165
1166         if (*separator != ',')
1167         {
1168                 ERROR("incomplete breakpoint/watchpoint packet received, dropping connection");
1169                 return ERROR_SERVER_REMOTE_CLOSED;
1170         }
1171
1172         size = strtoul(separator+1, &separator, 16);
1173
1174         switch (type)
1175         {
1176                 case 0:
1177                 case 1:
1178                         if (packet[0] == 'Z')
1179                         {
1180                                 if ((retval = breakpoint_add(target, address, size, bp_type)) != ERROR_OK)
1181                                 {
1182                                         if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
1183                                                 return retval;
1184                                 }
1185                                 else
1186                                 {
1187                                         gdb_put_packet(connection, "OK", 2);
1188                                 }
1189                         }
1190                         else
1191                         {
1192                                 breakpoint_remove(target, address);
1193                                 gdb_put_packet(connection, "OK", 2);
1194                         }
1195                         break;
1196                 case 2:
1197                 case 3:
1198                 case 4:
1199                 {
1200                         if (packet[0] == 'Z')
1201                         {
1202                                 if ((retval = watchpoint_add(target, address, size, type-2, 0, 0xffffffffu)) != ERROR_OK)
1203                                 {
1204                                         if ((retval = gdb_bp_wp_packet_error(connection, retval)) != ERROR_OK)
1205                                                 return retval;
1206                                 }
1207                                 else
1208                                 {
1209                                         gdb_put_packet(connection, "OK", 2);
1210                                 }
1211                         }
1212                         else
1213                         {
1214                                 watchpoint_remove(target, address);
1215                                 gdb_put_packet(connection, "OK", 2);
1216                         }
1217                         break;
1218                 }
1219                 default:
1220                         break;
1221         }
1222
1223         return ERROR_OK;
1224 }
1225
1226 /* print out a string and allocate more space as needed, mainly used for XML at this point */
1227 void xml_printf(int *retval, char **xml, int *pos, int *size, const char *fmt, ...)
1228 {
1229         if (*retval != ERROR_OK)
1230         {
1231                 return;
1232         }
1233         int first = 1;
1234
1235         for (;;)
1236         {
1237                 if ((*xml == NULL) || (!first))
1238                 {
1239                         /* start by 0 to exercise all the code paths.
1240                          * Need minimum 2 bytes to fit 1 char and 0 terminator. */
1241
1242                         *size = *size * 2 + 2;
1243                         char *t=*xml;
1244                         *xml = realloc(*xml, *size);
1245                         if (*xml == NULL)
1246                         {
1247                                 if (t)
1248                                         free(t);
1249                                 *retval=ERROR_SERVER_REMOTE_CLOSED;
1250                                 return;
1251                         }
1252                 }
1253
1254             va_list ap;
1255             int ret;
1256             va_start(ap, fmt);
1257             ret = vsnprintf(*xml + *pos, *size - *pos, fmt, ap);
1258             va_end(ap);
1259             if ((ret > 0) && ((ret + 1) < *size - *pos))
1260             {
1261                 *pos += ret;
1262                 return;
1263             }
1264             /* there was just enough or not enough space, allocate more. */
1265             first = 0;
1266         }
1267 }
1268
1269 static int decode_xfer_read (char *buf, char **annex, int *ofs, unsigned int *len)
1270 {
1271         char *separator;
1272
1273         /* Extract and NUL-terminate the annex. */
1274         *annex = buf;
1275         while (*buf && *buf != ':')
1276                 buf++;
1277         if (*buf == '\0')
1278                 return -1;
1279         *buf++ = 0;
1280
1281         /* After the read marker and annex, qXfer looks like a
1282          * traditional 'm' packet. */
1283
1284         *ofs = strtoul(buf, &separator, 16);
1285
1286         if (*separator != ',')
1287                 return -1;
1288
1289         *len = strtoul(separator+1, NULL, 16);
1290
1291         return 0;
1292 }
1293
1294 int gdb_query_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1295 {
1296         command_context_t *cmd_ctx = connection->cmd_ctx;
1297
1298         if (strstr(packet, "qRcmd,"))
1299         {
1300                 if (packet_size > 6)
1301                 {
1302                         char *cmd;
1303                         int i;
1304                         cmd = malloc((packet_size - 6)/2 + 1);
1305                         for (i=0; i < (packet_size - 6)/2; i++)
1306                         {
1307                                 u32 tmp;
1308                                 sscanf(packet + 6 + 2*i, "%2x", &tmp);
1309                                 cmd[i] = tmp;
1310                         }
1311                         cmd[(packet_size - 6)/2] = 0x0;
1312                         command_run_line(cmd_ctx, cmd);
1313                         free(cmd);
1314                 }
1315                 gdb_put_packet(connection, "OK", 2);
1316                 return ERROR_OK;
1317         }
1318         else if (strstr(packet, "qCRC:"))
1319         {
1320                 if (packet_size > 5)
1321                 {
1322                         int retval;
1323                         u8 gdb_reply[10];
1324                         char *separator;
1325                         u32 checksum;
1326                         u32 addr = 0;
1327                         u32 len = 0;
1328
1329                         /* skip command character */
1330                         packet += 5;
1331
1332                         addr = strtoul(packet, &separator, 16);
1333
1334                         if (*separator != ',')
1335                         {
1336                                 ERROR("incomplete read memory packet received, dropping connection");
1337                                 return ERROR_SERVER_REMOTE_CLOSED;
1338                         }
1339
1340                         len = strtoul(separator + 1, NULL, 16);
1341
1342                         retval = target_checksum_memory(target, addr, len, &checksum);
1343
1344                         if (retval == ERROR_OK)
1345                         {
1346                                 snprintf(gdb_reply, 10, "C%8.8x", checksum);
1347                                 gdb_put_packet(connection, gdb_reply, 9);
1348                         }
1349                         else
1350                         {
1351                                 if ((retval = gdb_memory_packet_error(connection, retval)) != ERROR_OK)
1352                                         return retval;
1353                         }
1354
1355                         return ERROR_OK;
1356                 }
1357         }
1358         else if (strstr(packet, "qSupported"))
1359         {
1360                 /* we currently support packet size and qXfer:memory-map:read (if enabled)
1361                  * disable qXfer:features:read for the moment */
1362                 int retval = ERROR_OK;
1363                 char *buffer = NULL;
1364                 int pos = 0;
1365                 int size = 0;
1366                 xml_printf(&retval, &buffer, &pos, &size,
1367                                 "PacketSize=%x;qXfer:memory-map:read%c;qXfer:features:read-",
1368                                 (GDB_BUFFER_SIZE - 1), gdb_use_memory_map == 1 ? '+' : '-');
1369                 if (buffer!=NULL)
1370                 {
1371                         gdb_put_packet(connection, buffer, strlen(buffer));
1372                         free(buffer);
1373                 }
1374                 return retval;
1375         }
1376         else if (strstr(packet, "qXfer:memory-map:read::"))
1377         {
1378                 /* We get away with only specifying flash here. Regions that are not
1379                  * specified are treated as if we provided no memory map(if not we
1380                  * could detect the holes and mark them as RAM).
1381                  * Normally we only execute this code once, but no big deal if we
1382                  * have to regenerate it a couple of times. */
1383
1384                 flash_bank_t *p;
1385                 char *xml = NULL;
1386                 int size = 0;
1387                 int pos = 0;
1388                 int retval = ERROR_OK;
1389
1390                 int offset;
1391                 int length;
1392                 char *separator;
1393
1394                 /* skip command character */
1395                 packet += 23;
1396
1397                 offset = strtoul(packet, &separator, 16);
1398                 length = strtoul(separator + 1, &separator, 16);
1399
1400                 xml_printf(&retval, &xml, &pos, &size, "<memory-map>\n");
1401
1402                 int i = 0;
1403                 for (;;)
1404                 {
1405                         p = get_flash_bank_by_num(i);
1406                         if (p == NULL)
1407                                 break;
1408
1409                         xml_printf(&retval, &xml, &pos, &size, "<memory type=\"flash\" start=\"0x%x\" length=\"0x%x\">\n" \
1410                                 "<property name=\"blocksize\">0x%x</property>\n" \
1411                                 "</memory>\n", \
1412                                 p->base, p->size, p->size/p->num_sectors);
1413                         i++;
1414                 }
1415
1416                 xml_printf(&retval, &xml, &pos, &size, "</memory-map>\n");
1417
1418                 if (retval != ERROR_OK)
1419                 {
1420                         gdb_send_error(connection, retval);
1421                         return retval;
1422                 }
1423
1424                 if (offset + length > pos)
1425                 {
1426                         length = pos - offset;
1427                 }
1428
1429                 char *t = malloc(length + 1);
1430                 t[0] = 'l';
1431                 memcpy(t + 1, xml + offset, length);
1432                 gdb_put_packet(connection, t, length + 1);
1433
1434                 free(t);
1435                 free(xml);
1436                 return ERROR_OK;
1437         }
1438         else if (strstr(packet, "qXfer:features:read:"))
1439         {
1440                 char *xml = NULL;
1441                 int size = 0;
1442                 int pos = 0;
1443                 int retval = ERROR_OK;
1444
1445                 int offset;
1446                 int length;
1447                 char *annex;
1448
1449                 /* skip command character */
1450                 packet += 20;
1451
1452                 if (decode_xfer_read( packet, &annex, &offset, &length ) < 0)
1453                 {
1454                         gdb_send_error(connection, 01);
1455                         return ERROR_OK;
1456                 }
1457
1458                 if (strcmp(annex, "target.xml") != 0)
1459                 {
1460                         gdb_send_error(connection, 01);
1461                         return ERROR_OK;
1462                 }
1463
1464                 xml_printf(&retval, &xml, &pos, &size, \
1465                         "l<target version=\"1.0\">\n<architecture>arm</architecture>\n</target>\n");
1466
1467                 if (retval != ERROR_OK)
1468                 {
1469                         gdb_send_error(connection, retval);
1470                         return retval;
1471                 }
1472
1473                 gdb_put_packet(connection, xml, strlen(xml) + 1);
1474
1475                 free(xml);
1476                 return ERROR_OK;
1477         }
1478
1479         gdb_put_packet(connection, "", 0);
1480         return ERROR_OK;
1481 }
1482
1483 int gdb_v_packet(connection_t *connection, target_t *target, char *packet, int packet_size)
1484 {
1485         gdb_connection_t *gdb_connection = connection->priv;
1486         gdb_service_t *gdb_service = connection->service->priv;
1487         int result;
1488
1489         /* if flash programming disabled - send a empty reply */
1490
1491         if (gdb_flash_program == 0)
1492         {
1493                 gdb_put_packet(connection, "", 0);
1494                 return ERROR_OK;
1495         }
1496
1497         if (strstr(packet, "vFlashErase:"))
1498         {
1499                 unsigned long addr;
1500                 unsigned long length;
1501
1502                 char *parse = packet + 12;
1503                 if (*parse == '\0')
1504                 {
1505                         ERROR("incomplete vFlashErase packet received, dropping connection");
1506                         return ERROR_SERVER_REMOTE_CLOSED;
1507                 }
1508
1509                 addr = strtoul(parse, &parse, 16);
1510
1511                 if (*(parse++) != ',' || *parse == '\0')
1512                 {
1513                         ERROR("incomplete vFlashErase packet received, dropping connection");
1514                         return ERROR_SERVER_REMOTE_CLOSED;
1515                 }
1516
1517                 length = strtoul(parse, &parse, 16);
1518
1519                 if (*parse != '\0')
1520                 {
1521                         ERROR("incomplete vFlashErase packet received, dropping connection");
1522                         return ERROR_SERVER_REMOTE_CLOSED;
1523                 }
1524
1525                 /* disable gdb output while programming */
1526                 gdb_connection->output_disable = 1;
1527
1528                 /* assume all sectors need erasing - stops any problems
1529                  * when flash_write is called multiple times */
1530                 flash_set_dirty();
1531
1532                 /* perform any target specific operations before the erase */
1533                 target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_PROGRAM);
1534
1535                 /* perform erase */
1536                 if ((result = flash_erase(gdb_service->target, addr, length)) != ERROR_OK)
1537                 {
1538                         /* GDB doesn't evaluate the actual error number returned,
1539                          * treat a failed erase as an I/O error
1540                          */
1541                         gdb_send_error(connection, EIO);
1542                         ERROR("flash_erase returned %i", result);
1543                 }
1544                 else
1545                         gdb_put_packet(connection, "OK", 2);
1546
1547                 /* reenable gdb output */
1548                 gdb_connection->output_disable = 0;
1549
1550                 return ERROR_OK;
1551         }
1552
1553         if (strstr(packet, "vFlashWrite:"))
1554         {
1555                 unsigned long addr;
1556                 unsigned long length;
1557                 char *parse = packet + 12;
1558
1559                 if (*parse == '\0')
1560                 {
1561                         ERROR("incomplete vFlashErase packet received, dropping connection");
1562                         return ERROR_SERVER_REMOTE_CLOSED;
1563                 }
1564                 addr = strtoul(parse, &parse, 16);
1565                 if (*(parse++) != ':')
1566                 {
1567                         ERROR("incomplete vFlashErase packet received, dropping connection");
1568                         return ERROR_SERVER_REMOTE_CLOSED;
1569                 }
1570                 length = packet_size - (parse - packet);
1571
1572                 /* disable gdb output while programming */
1573                 gdb_connection->output_disable = 1;
1574
1575                 /* create a new image if there isn't already one */
1576                 if (gdb_connection->vflash_image == NULL)
1577                 {
1578                         gdb_connection->vflash_image = malloc(sizeof(image_t));
1579                         image_open(gdb_connection->vflash_image, "", "build");
1580                 }
1581
1582                 /* create new section with content from packet buffer */
1583                 image_add_section(gdb_connection->vflash_image, addr, length, 0x0, (u8*)parse);
1584
1585                 gdb_put_packet(connection, "OK", 2);
1586
1587                 /* reenable gdb output */
1588                 gdb_connection->output_disable = 0;
1589
1590                 return ERROR_OK;
1591         }
1592
1593         if (!strcmp(packet, "vFlashDone"))
1594         {
1595                 u32 written;
1596                 char *error_str;
1597
1598                 /* disable gdb output while programming */
1599                 gdb_connection->output_disable = 1;
1600
1601                 /* process the flashing buffer */
1602                 if ((result = flash_write(gdb_service->target, gdb_connection->vflash_image, &written, &error_str, NULL, 0)) != ERROR_OK)
1603                 {
1604                         if (result == ERROR_FLASH_DST_OUT_OF_BANK)
1605                                 gdb_put_packet(connection, "E.memtype", 9);
1606                         else
1607                                 gdb_send_error(connection, EIO);
1608
1609                         if (error_str)
1610                         {
1611                                 ERROR("flash writing failed: %s", error_str);
1612                                 free(error_str);
1613                         }
1614                 }
1615                 else
1616                 {
1617                         DEBUG("wrote %u bytes from vFlash image to flash", written);
1618                         gdb_put_packet(connection, "OK", 2);
1619                 }
1620
1621                 image_close(gdb_connection->vflash_image);
1622                 free(gdb_connection->vflash_image);
1623                 gdb_connection->vflash_image = NULL;
1624
1625                 /* reenable gdb output */
1626                 gdb_connection->output_disable = 0;
1627
1628                 return ERROR_OK;
1629         }
1630
1631         gdb_put_packet(connection, "", 0);
1632         return ERROR_OK;
1633 }
1634
1635 int gdb_detach(connection_t *connection, target_t *target)
1636 {
1637         switch( detach_mode )
1638         {
1639                 case GDB_DETACH_RESUME:
1640                         target->type->resume(target, 1, 0, 1, 0);
1641                         break;
1642
1643                 case GDB_DETACH_RESET:
1644                         target_process_reset(connection->cmd_ctx);
1645                         break;
1646
1647                 case GDB_DETACH_HALT:
1648                         target->type->halt(target);
1649                         break;
1650
1651                 case GDB_DETACH_NOTHING:
1652                         break;
1653         }
1654
1655         gdb_put_packet(connection, "OK", 2);
1656
1657         return ERROR_OK;
1658 }
1659
1660 int gdb_input(connection_t *connection)
1661 {
1662         gdb_service_t *gdb_service = connection->service->priv;
1663         target_t *target = gdb_service->target;
1664         char packet[GDB_BUFFER_SIZE];
1665         int packet_size;
1666         int retval;
1667         gdb_connection_t *gdb_con = connection->priv;
1668         static int extended_protocol = 0;
1669
1670         /* drain input buffer */
1671         do
1672         {
1673                 packet_size = GDB_BUFFER_SIZE-1;
1674                 if ((retval = gdb_get_packet(connection, packet, &packet_size)) != ERROR_OK)
1675                 {
1676                         switch (retval)
1677                         {
1678                                 case ERROR_GDB_BUFFER_TOO_SMALL:
1679                                         ERROR("BUG: buffer supplied for gdb packet was too small");
1680                                         exit(-1);
1681                                 case ERROR_SERVER_REMOTE_CLOSED:
1682                                         return ERROR_SERVER_REMOTE_CLOSED;
1683                                 default:
1684                                         ERROR("BUG: unexpected error");
1685                                         exit(-1);
1686                         }
1687                 }
1688
1689                 /* terminate with zero */
1690                 packet[packet_size] = 0;
1691
1692                 DEBUG("received packet: '%s'", packet);
1693
1694                 if (packet_size > 0)
1695                 {
1696                         retval = ERROR_OK;
1697                         switch (packet[0])
1698                         {
1699                                 case 'H':
1700                                         /* Hct... -- set thread
1701                                          * we don't have threads, send empty reply */
1702                                         gdb_put_packet(connection, NULL, 0);
1703                                         break;
1704                                 case 'q':
1705                                         retval = gdb_query_packet(connection, target, packet, packet_size);
1706                                         break;
1707                                 case 'g':
1708                                         retval = gdb_get_registers_packet(connection, target, packet, packet_size);
1709                                         break;
1710                                 case 'G':
1711                                         retval = gdb_set_registers_packet(connection, target, packet, packet_size);
1712                                         break;
1713                                 case 'p':
1714                                         retval = gdb_get_register_packet(connection, target, packet, packet_size);
1715                                         break;
1716                                 case 'P':
1717                                         retval = gdb_set_register_packet(connection, target, packet, packet_size);
1718                                         break;
1719                                 case 'm':
1720                                         retval = gdb_read_memory_packet(connection, target, packet, packet_size);
1721                                         break;
1722                                 case 'M':
1723                                         retval = gdb_write_memory_packet(connection, target, packet, packet_size);
1724                                         break;
1725                                 case 'z':
1726                                 case 'Z':
1727                                         retval = gdb_breakpoint_watchpoint_packet(connection, target, packet, packet_size);
1728                                         break;
1729                                 case '?':
1730                                         gdb_last_signal_packet(connection, target, packet, packet_size);
1731                                         break;
1732                                 case 'c':
1733                                 case 's':
1734                                         gdb_step_continue_packet(connection, target, packet, packet_size);
1735                                         break;
1736                                 case 'v':
1737                                         retval = gdb_v_packet(connection, target, packet, packet_size);
1738                                         break;
1739                                 case 'D':
1740                                         retval = gdb_detach(connection, target);
1741                                         extended_protocol = 0;
1742                                         break;
1743                                 case 'X':
1744                                         if ((retval = gdb_write_memory_binary_packet(connection, target, packet, packet_size)) != ERROR_OK)
1745                                                 return retval;
1746                                         break;
1747                                 case 'k':
1748                                         if (extended_protocol != 0)
1749                                                 break;
1750                                         gdb_put_packet(connection, "OK", 2);
1751                                         return ERROR_SERVER_REMOTE_CLOSED;
1752                                 case '!':
1753                                         /* handle extended remote protocol */
1754                                         extended_protocol = 1;
1755                                         gdb_put_packet(connection, "OK", 2);
1756                                         break;
1757                                 case 'R':
1758                                         /* handle extended restart packet */
1759                                         target_process_reset(connection->cmd_ctx);
1760                                         break;
1761                                 default:
1762                                         /* ignore unkown packets */
1763                                         DEBUG("ignoring 0x%2.2x packet", packet[0]);
1764                                         gdb_put_packet(connection, NULL, 0);
1765                                         break;
1766                         }
1767
1768                         /* if a packet handler returned an error, exit input loop */
1769                         if (retval != ERROR_OK)
1770                                 return retval;
1771                 }
1772
1773                 if (gdb_con->ctrl_c)
1774                 {
1775                         if (target->state == TARGET_RUNNING)
1776                         {
1777                                 target->type->halt(target);
1778                                 gdb_con->ctrl_c = 0;
1779                         }
1780                 }
1781
1782         } while (gdb_con->buf_cnt > 0);
1783
1784         return ERROR_OK;
1785 }
1786
1787 int gdb_init()
1788 {
1789         gdb_service_t *gdb_service;
1790         target_t *target = targets;
1791         int i = 0;
1792
1793         if (!target)
1794         {
1795                 WARNING("no gdb ports allocated as no target has been specified");
1796                 return ERROR_OK;
1797         }
1798
1799         if (gdb_port == 0)
1800         {
1801                 WARNING("no gdb port specified, using default port 3333");
1802                 gdb_port = 3333;
1803         }
1804
1805         while (target)
1806         {
1807                 char service_name[8];
1808
1809                 snprintf(service_name, 8, "gdb-%2.2i", i);
1810
1811                 gdb_service = malloc(sizeof(gdb_service_t));
1812                 gdb_service->target = target;
1813
1814                 add_service("gdb", CONNECTION_GDB, gdb_port + i, 1, gdb_new_connection, gdb_input, gdb_connection_closed, gdb_service);
1815
1816                 DEBUG("gdb service for target %s at port %i", target->type->name, gdb_port + i);
1817
1818                 i++;
1819                 target = target->next;
1820         }
1821
1822         return ERROR_OK;
1823 }
1824
1825 /* daemon configuration command gdb_port */
1826 int handle_gdb_port_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1827 {
1828         if (argc == 0)
1829                 return ERROR_OK;
1830
1831         /* only if the port wasn't overwritten by cmdline */
1832         if (gdb_port == 0)
1833                 gdb_port = strtoul(args[0], NULL, 0);
1834
1835         return ERROR_OK;
1836 }
1837
1838 int handle_gdb_detach_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1839 {
1840         if (argc == 1)
1841         {
1842                 if (strcmp(args[0], "resume") == 0)
1843                 {
1844                         detach_mode = GDB_DETACH_RESUME;
1845                         return ERROR_OK;
1846                 }
1847                 else if (strcmp(args[0], "reset") == 0)
1848                 {
1849                         detach_mode = GDB_DETACH_RESET;
1850                         return ERROR_OK;
1851                 }
1852                 else if (strcmp(args[0], "halt") == 0)
1853                 {
1854                         detach_mode = GDB_DETACH_HALT;
1855                         return ERROR_OK;
1856                 }
1857                 else if (strcmp(args[0], "nothing") == 0)
1858                 {
1859                         detach_mode = GDB_DETACH_NOTHING;
1860                         return ERROR_OK;
1861                 }
1862         }
1863
1864         WARNING("invalid gdb_detach configuration directive: %s", args[0]);
1865         return ERROR_OK;
1866 }
1867
1868 int handle_gdb_memory_map_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1869 {
1870         if (argc == 1)
1871         {
1872                 if (strcmp(args[0], "enable") == 0)
1873                 {
1874                         gdb_use_memory_map = 1;
1875                         return ERROR_OK;
1876                 }
1877                 else if (strcmp(args[0], "disable") == 0)
1878                 {
1879                         gdb_use_memory_map = 0;
1880                         return ERROR_OK;
1881                 }
1882         }
1883
1884         WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);
1885         return ERROR_OK;
1886 }
1887
1888 int handle_gdb_flash_program_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1889 {
1890         if (argc == 1)
1891         {
1892                 if (strcmp(args[0], "enable") == 0)
1893                 {
1894                         gdb_flash_program = 1;
1895                         return ERROR_OK;
1896                 }
1897                 else if (strcmp(args[0], "disable") == 0)
1898                 {
1899                         gdb_flash_program = 0;
1900                         return ERROR_OK;
1901                 }
1902         }
1903
1904         WARNING("invalid gdb_memory_map configuration directive: %s", args[0]);
1905         return ERROR_OK;
1906 }
1907
1908 int gdb_register_commands(command_context_t *command_context)
1909 {
1910         register_command(command_context, NULL, "gdb_port", handle_gdb_port_command,
1911                         COMMAND_CONFIG, "");
1912         register_command(command_context, NULL, "gdb_detach", handle_gdb_detach_command,
1913                         COMMAND_CONFIG, "");
1914         register_command(command_context, NULL, "gdb_memory_map", handle_gdb_memory_map_command,
1915                         COMMAND_CONFIG, "");
1916         register_command(command_context, NULL, "gdb_flash_program", handle_gdb_flash_program_command,
1917                         COMMAND_CONFIG, "");
1918         return ERROR_OK;
1919 }