gdb/remote-m32r-sdi.c

   1 /* Remote debugging interface for M32R/SDI.
   2
   3    Copyright (C) 2003-2013 Free Software Foundation, Inc.
   4
   5    Contributed by Renesas Technology Co.
   6    Written by Kei Sakamoto <sakamoto.kei@renesas.com>.
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #include "defs.h"
  24 #include "gdbcmd.h"
  25 #include "gdbcore.h"
  26 #include "inferior.h"
  27 #include "target.h"
  28 #include "regcache.h"
  29 #include "gdb_string.h"
  30 #include "gdbthread.h"
  31 #include <ctype.h>
  32 #include <signal.h>
  33 #ifdef __MINGW32__
  34 #include <winsock2.h>
  35 #else
  36 #include <netinet/in.h>
  37 #endif
  38 #include <sys/types.h>
  39 #include <sys/time.h>
  40 #include <signal.h>
  41 #include <time.h>
  42 #include "gdb_bfd.h"
  43
  44
  45 #include "serial.h"
  46
  47 /* Descriptor for I/O to remote machine.  */
  48
  49 static struct serial *sdi_desc = NULL;
  50
  51 #define SDI_TIMEOUT 30
  52
  53
  54 #define SDIPORT 3232
  55
  56 static char chip_name[64];
  57
  58 static int step_mode;
  59 static unsigned long last_pc_addr = 0xffffffff;
  60 static unsigned char last_pc_addr_data[2];
  61
  62 static int mmu_on = 0;
  63
  64 static int use_ib_breakpoints = 1;
  65
  66 #define MAX_BREAKPOINTS 1024
  67 static int max_ib_breakpoints;
  68 static unsigned long bp_address[MAX_BREAKPOINTS];
  69 static unsigned char bp_data[MAX_BREAKPOINTS][4];
  70
  71 /* dbt -> nop */
  72 static const unsigned char dbt_bp_entry[] = {
  73   0x10, 0xe0, 0x70, 0x00
  74 };
  75
  76 #define MAX_ACCESS_BREAKS 4
  77 static int max_access_breaks;
  78 static unsigned long ab_address[MAX_ACCESS_BREAKS];
  79 static unsigned int ab_type[MAX_ACCESS_BREAKS];
  80 static unsigned int ab_size[MAX_ACCESS_BREAKS];
  81 static CORE_ADDR hit_watchpoint_addr = 0;
  82
  83 static int interrupted = 0;
  84
  85 /* Forward data declarations */
  86 extern struct target_ops m32r_ops;
  87
  88 /* This is the ptid we use while we're connected to the remote.  Its
  89    value is arbitrary, as the target doesn't have a notion of
  90    processes or threads, but we need something non-null to place in
  91    inferior_ptid.  */
  92 static ptid_t remote_m32r_ptid;
  93
  94 /* Commands */
  95 #define SDI_OPEN                 1
  96 #define SDI_CLOSE                2
  97 #define SDI_RELEASE              3
  98 #define SDI_READ_CPU_REG         4
  99 #define SDI_WRITE_CPU_REG        5
 100 #define SDI_READ_MEMORY          6
 101 #define SDI_WRITE_MEMORY         7
 102 #define SDI_EXEC_CPU             8
 103 #define SDI_STOP_CPU             9
 104 #define SDI_WAIT_FOR_READY      10
 105 #define SDI_GET_ATTR            11
 106 #define SDI_SET_ATTR            12
 107 #define SDI_STATUS              13
 108
 109 /* Attributes */
 110 #define SDI_ATTR_NAME            1
 111 #define SDI_ATTR_BRK             2
 112 #define SDI_ATTR_ABRK            3
 113 #define SDI_ATTR_CACHE           4
 114 #define SDI_CACHE_TYPE_M32102    0
 115 #define SDI_CACHE_TYPE_CHAOS     1
 116 #define SDI_ATTR_MEM_ACCESS      5
 117 #define SDI_MEM_ACCESS_DEBUG_DMA 0
 118 #define SDI_MEM_ACCESS_MON_CODE  1
 119
 120 /* Registers */
 121 #define SDI_REG_R0               0
 122 #define SDI_REG_R1               1
 123 #define SDI_REG_R2               2
 124 #define SDI_REG_R3               3
 125 #define SDI_REG_R4               4
 126 #define SDI_REG_R5               5
 127 #define SDI_REG_R6               6
 128 #define SDI_REG_R7               7
 129 #define SDI_REG_R8               8
 130 #define SDI_REG_R9               9
 131 #define SDI_REG_R10             10
 132 #define SDI_REG_R11             11
 133 #define SDI_REG_R12             12
 134 #define SDI_REG_FP              13
 135 #define SDI_REG_LR              14
 136 #define SDI_REG_SP              15
 137 #define SDI_REG_PSW             16
 138 #define SDI_REG_CBR             17
 139 #define SDI_REG_SPI             18
 140 #define SDI_REG_SPU             19
 141 #define SDI_REG_CR4             20
 142 #define SDI_REG_EVB             21
 143 #define SDI_REG_BPC             22
 144 #define SDI_REG_CR7             23
 145 #define SDI_REG_BBPSW           24
 146 #define SDI_REG_CR9             25
 147 #define SDI_REG_CR10            26
 148 #define SDI_REG_CR11            27
 149 #define SDI_REG_CR12            28
 150 #define SDI_REG_WR              29
 151 #define SDI_REG_BBPC            30
 152 #define SDI_REG_PBP             31
 153 #define SDI_REG_ACCH            32
 154 #define SDI_REG_ACCL            33
 155 #define SDI_REG_ACC1H           34
 156 #define SDI_REG_ACC1L           35
 157
 158
 159 /* Low level communication functions.  */
 160
 161 /* Check an ack packet from the target.  */
 162 static int
 163 get_ack (void)
 164 {
 165   int c;
 166
 167   if (!sdi_desc)
 168     return -1;
 169
 170   c = serial_readchar (sdi_desc, SDI_TIMEOUT);
 171
 172   if (c < 0)
 173     return -1;
 174
 175   if (c != '+')                 /* error */
 176     return -1;
 177
 178   return 0;
 179 }
 180
 181 /* Send data to the target and check an ack packet.  */
 182 static int
 183 send_data (void *buf, int len)
 184 {
 185   if (!sdi_desc)
 186     return -1;
 187
 188   if (serial_write (sdi_desc, buf, len) != 0)
 189     return -1;
 190
 191   if (get_ack () == -1)
 192     return -1;
 193
 194   return len;
 195 }
 196
 197 /* Receive data from the target.  */
 198 static int
 199 recv_data (void *buf, int len)
 200 {
 201   int total = 0;
 202   int c;
 203
 204   if (!sdi_desc)
 205     return -1;
 206
 207   while (total < len)
 208     {
 209       c = serial_readchar (sdi_desc, SDI_TIMEOUT);
 210
 211       if (c < 0)
 212         return -1;
 213
 214       ((unsigned char *) buf)[total++] = c;
 215     }
 216
 217   return len;
 218 }
 219
 220 /* Store unsigned long parameter on packet.  */
 221 static void
 222 store_long_parameter (void *buf, long val)
 223 {
 224   val = htonl (val);
 225   memcpy (buf, &val, 4);
 226 }
 227
 228 static int
 229 send_cmd (unsigned char cmd)
 230 {
 231   unsigned char buf[1];
 232
 233   buf[0] = cmd;
 234   return send_data (buf, 1);
 235 }
 236
 237 static int
 238 send_one_arg_cmd (unsigned char cmd, unsigned char arg1)
 239 {
 240   unsigned char buf[2];
 241
 242   buf[0] = cmd;
 243   buf[1] = arg1;
 244   return send_data (buf, 2);
 245 }
 246
 247 static int
 248 send_two_arg_cmd (unsigned char cmd, unsigned char arg1, unsigned long arg2)
 249 {
 250   unsigned char buf[6];
 251
 252   buf[0] = cmd;
 253   buf[1] = arg1;
 254   store_long_parameter (buf + 2, arg2);
 255   return send_data (buf, 6);
 256 }
 257
 258 static int
 259 send_three_arg_cmd (unsigned char cmd, unsigned long arg1, unsigned long arg2,
 260                     unsigned long arg3)
 261 {
 262   unsigned char buf[13];
 263
 264   buf[0] = cmd;
 265   store_long_parameter (buf + 1, arg1);
 266   store_long_parameter (buf + 5, arg2);
 267   store_long_parameter (buf + 9, arg3);
 268   return send_data (buf, 13);
 269 }
 270
 271 static unsigned char
 272 recv_char_data (void)
 273 {
 274   unsigned char val;
 275
 276   recv_data (&val, 1);
 277   return val;
 278 }
 279
 280 static unsigned long
 281 recv_long_data (void)
 282 {
 283   unsigned long val;
 284
 285   recv_data (&val, 4);
 286   return ntohl (val);
 287 }
 288
 289
 290 /* Check if MMU is on.  */
 291 static void
 292 check_mmu_status (void)
 293 {
 294   unsigned long val;
 295
 296   /* Read PC address.  */
 297   if (send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_BPC) == -1)
 298     return;
 299   val = recv_long_data ();
 300   if ((val & 0xc0000000) == 0x80000000)
 301     {
 302       mmu_on = 1;
 303       return;
 304     }
 305
 306   /* Read EVB address.  */
 307   if (send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_EVB) == -1)
 308     return;
 309   val = recv_long_data ();
 310   if ((val & 0xc0000000) == 0x80000000)
 311     {
 312       mmu_on = 1;
 313       return;
 314     }
 315
 316   mmu_on = 0;
 317 }
 318
 319
 320 /* This is called not only when we first attach, but also when the
 321    user types "run" after having attached.  */
 322 static void
 323 m32r_create_inferior (struct target_ops *ops, char *execfile,
 324                       char *args, char **env, int from_tty)
 325 {
 326   CORE_ADDR entry_pt;
 327
 328   if (args && *args)
 329     error (_("Cannot pass arguments to remote STDEBUG process"));
 330
 331   if (execfile == 0 || exec_bfd == 0)
 332     error (_("No executable file specified"));
 333
 334   if (remote_debug)
 335     fprintf_unfiltered (gdb_stdlog, "m32r_create_inferior(%s,%s)\n", execfile,
 336                         args);
 337
 338   entry_pt = bfd_get_start_address (exec_bfd);
 339
 340   /* The "process" (board) is already stopped awaiting our commands, and
 341      the program is already downloaded.  We just set its PC and go.  */
 342
 343   clear_proceed_status ();
 344
 345   /* Tell wait_for_inferior that we've started a new process.  */
 346   init_wait_for_inferior ();
 347
 348   /* Set up the "saved terminal modes" of the inferior
 349      based on what modes we are starting it with.  */
 350   target_terminal_init ();
 351
 352   /* Install inferior's terminal modes.  */
 353   target_terminal_inferior ();
 354
 355   regcache_write_pc (get_current_regcache (), entry_pt);
 356 }
 357
 358 /* Open a connection to a remote debugger.
 359    NAME is the filename used for communication.  */
 360
 361 static void
 362 m32r_open (char *args, int from_tty)
 363 {
 364   struct hostent *host_ent;
 365   struct sockaddr_in server_addr;
 366   char *port_str, hostname[256];
 367   int port;
 368   int i, n;
 369   int yes = 1;
 370
 371   if (remote_debug)
 372     fprintf_unfiltered (gdb_stdlog, "m32r_open(%d)\n", from_tty);
 373
 374   target_preopen (from_tty);
 375
 376   push_target (&m32r_ops);
 377
 378   if (args == NULL)
 379     xsnprintf (hostname, sizeof (hostname), "localhost:%d", SDIPORT);
 380   else
 381     {
 382       port_str = strchr (args, ':');
 383       if (port_str == NULL)
 384         xsnprintf (hostname, sizeof (hostname), "%s:%d", args, SDIPORT);
 385       else
 386         xsnprintf (hostname, sizeof (hostname), "%s", args);
 387     }
 388
 389   sdi_desc = serial_open (hostname);
 390   if (!sdi_desc)
 391     error (_("Connection refused."));
 392
 393   if (get_ack () == -1)
 394     error (_("Cannot connect to SDI target."));
 395
 396   if (send_cmd (SDI_OPEN) == -1)
 397     error (_("Cannot connect to SDI target."));
 398
 399   /* Get maximum number of ib breakpoints.  */
 400   send_one_arg_cmd (SDI_GET_ATTR, SDI_ATTR_BRK);
 401   max_ib_breakpoints = recv_char_data ();
 402   if (remote_debug)
 403     printf_filtered ("Max IB Breakpoints = %d\n", max_ib_breakpoints);
 404
 405   /* Initialize breakpoints.  */
 406   for (i = 0; i < MAX_BREAKPOINTS; i++)
 407     bp_address[i] = 0xffffffff;
 408
 409   /* Get maximum number of access breaks.  */
 410   send_one_arg_cmd (SDI_GET_ATTR, SDI_ATTR_ABRK);
 411   max_access_breaks = recv_char_data ();
 412   if (remote_debug)
 413     printf_filtered ("Max Access Breaks = %d\n", max_access_breaks);
 414
 415   /* Initialize access breask.  */
 416   for (i = 0; i < MAX_ACCESS_BREAKS; i++)
 417     ab_address[i] = 0x00000000;
 418
 419   check_mmu_status ();
 420
 421   /* Get the name of chip on target board.  */
 422   send_one_arg_cmd (SDI_GET_ATTR, SDI_ATTR_NAME);
 423   recv_data (chip_name, 64);
 424
 425   if (from_tty)
 426     printf_filtered ("Remote %s connected to %s\n", target_shortname,
 427                      chip_name);
 428 }
 429
 430 /* Close out all files and local state before this target loses control.  */
 431
 432 static void
 433 m32r_close (int quitting)
 434 {
 435   if (remote_debug)
 436     fprintf_unfiltered (gdb_stdlog, "m32r_close(%d)\n", quitting);
 437
 438   if (sdi_desc)
 439     {
 440       send_cmd (SDI_CLOSE);
 441       serial_close (sdi_desc);
 442       sdi_desc = NULL;
 443     }
 444
 445   inferior_ptid = null_ptid;
 446   delete_thread_silent (remote_m32r_ptid);
 447   return;
 448 }
 449
 450 /* Tell the remote machine to resume.  */
 451
 452 static void
 453 m32r_resume (struct target_ops *ops,
 454              ptid_t ptid, int step, enum gdb_signal sig)
 455 {
 456   unsigned long pc_addr, bp_addr, ab_addr;
 457   int ib_breakpoints;
 458   unsigned char buf[13];
 459   int i;
 460
 461   if (remote_debug)
 462     {
 463       if (step)
 464         fprintf_unfiltered (gdb_stdlog, "\nm32r_resume(step)\n");
 465       else
 466         fprintf_unfiltered (gdb_stdlog, "\nm32r_resume(cont)\n");
 467     }
 468
 469   check_mmu_status ();
 470
 471   pc_addr = regcache_read_pc (get_current_regcache ());
 472   if (remote_debug)
 473     fprintf_unfiltered (gdb_stdlog, "pc <= 0x%lx\n", pc_addr);
 474
 475   /* At pc address there is a parallel instruction with +2 offset,
 476      so we have to make it a serial instruction or avoid it.  */
 477   if (pc_addr == last_pc_addr)
 478     {
 479       /* Avoid a parallel nop.  */
 480       if (last_pc_addr_data[0] == 0xf0 && last_pc_addr_data[1] == 0x00)
 481         {
 482           pc_addr += 2;
 483           /* Now we can forget this instruction.  */
 484           last_pc_addr = 0xffffffff;
 485         }
 486       /* Clear a parallel bit.  */
 487       else
 488         {
 489           buf[0] = SDI_WRITE_MEMORY;
 490           if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
 491             store_long_parameter (buf + 1, pc_addr);
 492           else
 493             store_long_parameter (buf + 1, pc_addr - 1);
 494           store_long_parameter (buf + 5, 1);
 495           buf[9] = last_pc_addr_data[0] & 0x7f;
 496           send_data (buf, 10);
 497         }
 498     }
 499
 500   /* Set PC.  */
 501   send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_BPC, pc_addr);
 502
 503   /* step mode.  */
 504   step_mode = step;
 505   if (step)
 506     {
 507       /* Set PBP.  */
 508       send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_PBP, pc_addr | 1);
 509     }
 510   else
 511     {
 512       /* Unset PBP.  */
 513       send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_PBP, 0x00000000);
 514     }
 515
 516   if (use_ib_breakpoints)
 517     ib_breakpoints = max_ib_breakpoints;
 518   else
 519     ib_breakpoints = 0;
 520
 521   /* Set ib breakpoints.  */
 522   for (i = 0; i < ib_breakpoints; i++)
 523     {
 524       bp_addr = bp_address[i];
 525
 526       if (bp_addr == 0xffffffff)
 527         continue;
 528
 529       /* Set PBP.  */
 530       if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
 531         send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8000 + 4 * i, 4,
 532                             0x00000006);
 533       else
 534         send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8000 + 4 * i, 4,
 535                             0x06000000);
 536
 537       send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8080 + 4 * i, 4, bp_addr);
 538     }
 539
 540   /* Set dbt breakpoints.  */
 541   for (i = ib_breakpoints; i < MAX_BREAKPOINTS; i++)
 542     {
 543       bp_addr = bp_address[i];
 544
 545       if (bp_addr == 0xffffffff)
 546         continue;
 547
 548       if (!mmu_on)
 549         bp_addr &= 0x7fffffff;
 550
 551       /* Write DBT instruction.  */
 552       buf[0] = SDI_WRITE_MEMORY;
 553       store_long_parameter (buf + 1, (bp_addr & 0xfffffffc));
 554       store_long_parameter (buf + 5, 4);
 555       if ((bp_addr & 2) == 0 && bp_addr != (pc_addr & 0xfffffffc))
 556         {
 557           if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
 558             {
 559               buf[9] = dbt_bp_entry[0];
 560               buf[10] = dbt_bp_entry[1];
 561               buf[11] = dbt_bp_entry[2];
 562               buf[12] = dbt_bp_entry[3];
 563             }
 564           else
 565             {
 566               buf[9] = dbt_bp_entry[3];
 567               buf[10] = dbt_bp_entry[2];
 568               buf[11] = dbt_bp_entry[1];
 569               buf[12] = dbt_bp_entry[0];
 570             }
 571         }
 572       else
 573         {
 574           if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
 575             {
 576               if ((bp_addr & 2) == 0)
 577                 {
 578                   buf[9] = dbt_bp_entry[0];
 579                   buf[10] = dbt_bp_entry[1];
 580                   buf[11] = bp_data[i][2] & 0x7f;
 581                   buf[12] = bp_data[i][3];
 582                 }
 583               else
 584                 {
 585                   buf[9] = bp_data[i][0];
 586                   buf[10] = bp_data[i][1];
 587                   buf[11] = dbt_bp_entry[0];
 588                   buf[12] = dbt_bp_entry[1];
 589                 }
 590             }
 591           else
 592             {
 593               if ((bp_addr & 2) == 0)
 594                 {
 595                   buf[9] = bp_data[i][0];
 596                   buf[10] = bp_data[i][1] & 0x7f;
 597                   buf[11] = dbt_bp_entry[1];
 598                   buf[12] = dbt_bp_entry[0];
 599                 }
 600               else
 601                 {
 602                   buf[9] = dbt_bp_entry[1];
 603                   buf[10] = dbt_bp_entry[0];
 604                   buf[11] = bp_data[i][2];
 605                   buf[12] = bp_data[i][3];
 606                 }
 607             }
 608         }
 609       send_data (buf, 13);
 610     }
 611
 612   /* Set access breaks.  */
 613   for (i = 0; i < max_access_breaks; i++)
 614     {
 615       ab_addr = ab_address[i];
 616
 617       if (ab_addr == 0x00000000)
 618         continue;
 619
 620       /* DBC register.  */
 621       if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
 622         {
 623           switch (ab_type[i])
 624             {
 625             case 0:             /* write watch */
 626               send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
 627                                   0x00000086);
 628               break;
 629             case 1:             /* read watch */
 630               send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
 631                                   0x00000046);
 632               break;
 633             case 2:             /* access watch */
 634               send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
 635                                   0x00000006);
 636               break;
 637             }
 638         }
 639       else
 640         {
 641           switch (ab_type[i])
 642             {
 643             case 0:             /* write watch */
 644               send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
 645                                   0x86000000);
 646               break;
 647             case 1:             /* read watch */
 648               send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
 649                                   0x46000000);
 650               break;
 651             case 2:             /* access watch */
 652               send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
 653                                   0x06000000);
 654               break;
 655             }
 656         }
 657
 658       /* DBAH register.  */
 659       send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8180 + 4 * i, 4, ab_addr);
 660
 661       /* DBAL register.  */
 662       send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8200 + 4 * i, 4,
 663                           0xffffffff);
 664
 665       /* DBD register.  */
 666       send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8280 + 4 * i, 4,
 667                           0x00000000);
 668
 669       /* DBDM register.  */
 670       send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8300 + 4 * i, 4,
 671                           0x00000000);
 672     }
 673
 674   /* Resume program.  */
 675   send_cmd (SDI_EXEC_CPU);
 676
 677   /* Without this, some commands which require an active target (such as kill)
 678      won't work.  This variable serves (at least) double duty as both the pid
 679      of the target process (if it has such), and as a flag indicating that a
 680      target is active.  These functions should be split out into seperate
 681      variables, especially since GDB will someday have a notion of debugging
 682      several processes.  */
 683   inferior_ptid = remote_m32r_ptid;
 684   add_thread_silent (remote_m32r_ptid);
 685
 686   return;
 687 }
 688
 689 /* Wait until the remote machine stops, then return,
 690    storing status in STATUS just as `wait' would.  */
 691
 692 static void
 693 gdb_cntrl_c (int signo)
 694 {
 695   if (remote_debug)
 696     fprintf_unfiltered (gdb_stdlog, "interrupt\n");
 697   interrupted = 1;
 698 }
 699
 700 static ptid_t
 701 m32r_wait (struct target_ops *ops,
 702            ptid_t ptid, struct target_waitstatus *status, int options)
 703 {
 704   static RETSIGTYPE (*prev_sigint) ();
 705   unsigned long bp_addr, pc_addr;
 706   int ib_breakpoints;
 707   long i;
 708   unsigned char buf[13];
 709   int ret, c;
 710
 711   if (remote_debug)
 712     fprintf_unfiltered (gdb_stdlog, "m32r_wait()\n");
 713
 714   status->kind = TARGET_WAITKIND_EXITED;
 715   status->value.sig = GDB_SIGNAL_0;
 716
 717   interrupted = 0;
 718   prev_sigint = signal (SIGINT, gdb_cntrl_c);
 719
 720   /* Wait for ready.  */
 721   buf[0] = SDI_WAIT_FOR_READY;
 722   if (serial_write (sdi_desc, buf, 1) != 0)
 723     error (_("Remote connection closed"));
 724
 725   while (1)
 726     {
 727       c = serial_readchar (sdi_desc, SDI_TIMEOUT);
 728       if (c < 0)
 729         error (_("Remote connection closed"));
 730
 731       if (c == '-')             /* error */
 732         {
 733           status->kind = TARGET_WAITKIND_STOPPED;
 734           status->value.sig = GDB_SIGNAL_HUP;
 735           return inferior_ptid;
 736         }
 737       else if (c == '+')        /* stopped */
 738         break;
 739
 740       if (interrupted)
 741         ret = serial_write (sdi_desc, "!", 1);  /* packet to interrupt */
 742       else
 743         ret = serial_write (sdi_desc, ".", 1);  /* packet to wait */
 744       if (ret != 0)
 745         error (_("Remote connection closed"));
 746     }
 747
 748   status->kind = TARGET_WAITKIND_STOPPED;
 749   if (interrupted)
 750     status->value.sig = GDB_SIGNAL_INT;
 751   else
 752     status->value.sig = GDB_SIGNAL_TRAP;
 753
 754   interrupted = 0;
 755   signal (SIGINT, prev_sigint);
 756
 757   check_mmu_status ();
 758
 759   /* Recover parallel bit.  */
 760   if (last_pc_addr != 0xffffffff)
 761     {
 762       buf[0] = SDI_WRITE_MEMORY;
 763       if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
 764         store_long_parameter (buf + 1, last_pc_addr);
 765       else
 766         store_long_parameter (buf + 1, last_pc_addr - 1);
 767       store_long_parameter (buf + 5, 1);
 768       buf[9] = last_pc_addr_data[0];
 769       send_data (buf, 10);
 770       last_pc_addr = 0xffffffff;
 771     }
 772
 773   if (use_ib_breakpoints)
 774     ib_breakpoints = max_ib_breakpoints;
 775   else
 776     ib_breakpoints = 0;
 777
 778   /* Set back pc by 2 if m32r is stopped with dbt.  */
 779   last_pc_addr = 0xffffffff;
 780   send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_BPC);
 781   pc_addr = recv_long_data () - 2;
 782   for (i = ib_breakpoints; i < MAX_BREAKPOINTS; i++)
 783     {
 784       if (pc_addr == bp_address[i])
 785         {
 786           send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_BPC, pc_addr);
 787
 788           /* If there is a parallel instruction with +2 offset at pc
 789              address, we have to take care of it later.  */
 790           if ((pc_addr & 0x2) != 0)
 791             {
 792               if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
 793                 {
 794                   if ((bp_data[i][2] & 0x80) != 0)
 795                     {
 796                       last_pc_addr = pc_addr;
 797                       last_pc_addr_data[0] = bp_data[i][2];
 798                       last_pc_addr_data[1] = bp_data[i][3];
 799                     }
 800                 }
 801               else
 802                 {
 803                   if ((bp_data[i][1] & 0x80) != 0)
 804                     {
 805                       last_pc_addr = pc_addr;
 806                       last_pc_addr_data[0] = bp_data[i][1];
 807                       last_pc_addr_data[1] = bp_data[i][0];
 808                     }
 809                 }
 810             }
 811           break;
 812         }
 813     }
 814
 815   /* Remove ib breakpoints.  */
 816   for (i = 0; i < ib_breakpoints; i++)
 817     {
 818       if (bp_address[i] != 0xffffffff)
 819         send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8000 + 4 * i, 4,
 820                             0x00000000);
 821     }
 822   /* Remove dbt breakpoints.  */
 823   for (i = ib_breakpoints; i < MAX_BREAKPOINTS; i++)
 824     {
 825       bp_addr = bp_address[i];
 826       if (bp_addr != 0xffffffff)
 827         {
 828           if (!mmu_on)
 829             bp_addr &= 0x7fffffff;
 830           buf[0] = SDI_WRITE_MEMORY;
 831           store_long_parameter (buf + 1, bp_addr & 0xfffffffc);
 832           store_long_parameter (buf + 5, 4);
 833           buf[9] = bp_data[i][0];
 834           buf[10] = bp_data[i][1];
 835           buf[11] = bp_data[i][2];
 836           buf[12] = bp_data[i][3];
 837           send_data (buf, 13);
 838         }
 839     }
 840
 841   /* Remove access breaks.  */
 842   hit_watchpoint_addr = 0;
 843   for (i = 0; i < max_access_breaks; i++)
 844     {
 845       if (ab_address[i] != 0x00000000)
 846         {
 847           buf[0] = SDI_READ_MEMORY;
 848           store_long_parameter (buf + 1, 0xffff8100 + 4 * i);
 849           store_long_parameter (buf + 5, 4);
 850           serial_write (sdi_desc, buf, 9);
 851           c = serial_readchar (sdi_desc, SDI_TIMEOUT);
 852           if (c != '-' && recv_data (buf, 4) != -1)
 853             {
 854               if (gdbarch_byte_order (target_gdbarch ()) == BFD_ENDIAN_BIG)
 855                 {
 856                   if ((buf[3] & 0x1) == 0x1)
 857                     hit_watchpoint_addr = ab_address[i];
 858                 }
 859               else
 860                 {
 861                   if ((buf[0] & 0x1) == 0x1)
 862                     hit_watchpoint_addr = ab_address[i];
 863                 }
 864             }
 865
 866           send_three_arg_cmd (SDI_WRITE_MEMORY, 0xffff8100 + 4 * i, 4,
 867                               0x00000000);
 868         }
 869     }
 870
 871   if (remote_debug)
 872     fprintf_unfiltered (gdb_stdlog, "pc => 0x%lx\n", pc_addr);
 873
 874   return inferior_ptid;
 875 }
 876
 877 /* Terminate the open connection to the remote debugger.
 878    Use this when you want to detach and do something else
 879    with your gdb.  */
 880 static void
 881 m32r_detach (struct target_ops *ops, char *args, int from_tty)
 882 {
 883   if (remote_debug)
 884     fprintf_unfiltered (gdb_stdlog, "m32r_detach(%d)\n", from_tty);
 885
 886   m32r_resume (ops, inferior_ptid, 0, GDB_SIGNAL_0);
 887
 888   /* Calls m32r_close to do the real work.  */
 889   pop_target ();
 890   if (from_tty)
 891     fprintf_unfiltered (gdb_stdlog, "Ending remote %s debugging\n",
 892                         target_shortname);
 893 }
 894
 895 /* Return the id of register number REGNO.  */
 896
 897 static int
 898 get_reg_id (int regno)
 899 {
 900   switch (regno)
 901     {
 902     case 20:
 903       return SDI_REG_BBPC;
 904     case 21:
 905       return SDI_REG_BPC;
 906     case 22:
 907       return SDI_REG_ACCL;
 908     case 23:
 909       return SDI_REG_ACCH;
 910     case 24:
 911       return SDI_REG_EVB;
 912     }
 913
 914   return regno;
 915 }
 916
 917 /* Fetch register REGNO, or all registers if REGNO is -1.
 918    Returns errno value.  */
 919 static void
 920 m32r_fetch_register (struct target_ops *ops,
 921                      struct regcache *regcache, int regno)
 922 {
 923   struct gdbarch *gdbarch = get_regcache_arch (regcache);
 924   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
 925   unsigned long val, val2, regid;
 926
 927   if (regno == -1)
 928     {
 929       for (regno = 0;
 930            regno < gdbarch_num_regs (get_regcache_arch (regcache));
 931            regno++)
 932         m32r_fetch_register (ops, regcache, regno);
 933     }
 934   else
 935     {
 936       char buffer[MAX_REGISTER_SIZE];
 937
 938       regid = get_reg_id (regno);
 939       send_one_arg_cmd (SDI_READ_CPU_REG, regid);
 940       val = recv_long_data ();
 941
 942       if (regid == SDI_REG_PSW)
 943         {
 944           send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_BBPSW);
 945           val2 = recv_long_data ();
 946           val = ((0x00cf & val2) << 8) | ((0xcf00 & val) >> 8);
 947         }
 948
 949       if (remote_debug)
 950         fprintf_unfiltered (gdb_stdlog, "m32r_fetch_register(%d,0x%08lx)\n",
 951                             regno, val);
 952
 953       /* We got the number the register holds, but gdb expects to see a
 954          value in the target byte ordering.  */
 955       store_unsigned_integer (buffer, 4, byte_order, val);
 956       regcache_raw_supply (regcache, regno, buffer);
 957     }
 958   return;
 959 }
 960
 961 /* Store register REGNO, or all if REGNO == 0.
 962    Return errno value.  */
 963 static void
 964 m32r_store_register (struct target_ops *ops,
 965                      struct regcache *regcache, int regno)
 966 {
 967   int regid;
 968   ULONGEST regval, tmp;
 969
 970   if (regno == -1)
 971     {
 972       for (regno = 0;
 973            regno < gdbarch_num_regs (get_regcache_arch (regcache));
 974            regno++)
 975         m32r_store_register (ops, regcache, regno);
 976     }
 977   else
 978     {
 979       regcache_cooked_read_unsigned (regcache, regno, &regval);
 980       regid = get_reg_id (regno);
 981
 982       if (regid == SDI_REG_PSW)
 983         {
 984           unsigned long psw, bbpsw;
 985
 986           send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_PSW);
 987           psw = recv_long_data ();
 988
 989           send_one_arg_cmd (SDI_READ_CPU_REG, SDI_REG_BBPSW);
 990           bbpsw = recv_long_data ();
 991
 992           tmp = (0x00cf & psw) | ((0x00cf & regval) << 8);
 993           send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_PSW, tmp);
 994
 995           tmp = (0x0030 & bbpsw) | ((0xcf00 & regval) >> 8);
 996           send_two_arg_cmd (SDI_WRITE_CPU_REG, SDI_REG_BBPSW, tmp);
 997         }
 998       else
 999         {
1000           send_two_arg_cmd (SDI_WRITE_CPU_REG, regid, regval);
1001         }
1002
1003       if (remote_debug)
1004         fprintf_unfiltered (gdb_stdlog, "m32r_store_register(%d,0x%08lu)\n",
1005                             regno, (unsigned long) regval);
1006     }
1007 }
1008
1009 /* Get ready to modify the registers array.  On machines which store
1010    individual registers, this doesn't need to do anything.  On machines
1011    which store all the registers in one fell swoop, this makes sure
1012    that registers contains all the registers from the program being
1013    debugged.  */
1014
1015 static void
1016 m32r_prepare_to_store (struct regcache *regcache)
1017 {
1018   /* Do nothing, since we can store individual regs.  */
1019   if (remote_debug)
1020     fprintf_unfiltered (gdb_stdlog, "m32r_prepare_to_store()\n");
1021 }
1022
1023 static void
1024 m32r_files_info (struct target_ops *target)
1025 {
1026   const char *file = "nothing";
1027
1028   if (exec_bfd)
1029     {
1030       file = bfd_get_filename (exec_bfd);
1031       printf_filtered ("\tAttached to %s running program %s\n",
1032                        chip_name, file);
1033     }
1034 }
1035
1036 /* Read/Write memory.  */
1037 static int
1038 m32r_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len,
1039                   int write,
1040                   struct mem_attrib *attrib, struct target_ops *target)
1041 {
1042   unsigned long taddr;
1043   unsigned char buf[0x2000];
1044   int ret, c;
1045
1046   taddr = memaddr;
1047
1048   if (!mmu_on)
1049     {
1050       if ((taddr & 0xa0000000) == 0x80000000)
1051         taddr &= 0x7fffffff;
1052     }
1053
1054   if (remote_debug)
1055     {
1056       if (write)
1057         fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory(%s,%d,write)\n",
1058                             paddress (target_gdbarch (), memaddr), len);
1059       else
1060         fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory(%s,%d,read)\n",
1061                             paddress (target_gdbarch (), memaddr), len);
1062     }
1063
1064   if (write)
1065     {
1066       buf[0] = SDI_WRITE_MEMORY;
1067       store_long_parameter (buf + 1, taddr);
1068       store_long_parameter (buf + 5, len);
1069       if (len < 0x1000)
1070         {
1071           memcpy (buf + 9, myaddr, len);
1072           ret = send_data (buf, len + 9) - 9;
1073         }
1074       else
1075         {
1076           if (serial_write (sdi_desc, buf, 9) != 0)
1077             {
1078               if (remote_debug)
1079                 fprintf_unfiltered (gdb_stdlog,
1080                                     "m32r_xfer_memory() failed\n");
1081               return 0;
1082             }
1083           ret = send_data (myaddr, len);
1084         }
1085     }
1086   else
1087     {
1088       buf[0] = SDI_READ_MEMORY;
1089       store_long_parameter (buf + 1, taddr);
1090       store_long_parameter (buf + 5, len);
1091       if (serial_write (sdi_desc, buf, 9) != 0)
1092         {
1093           if (remote_debug)
1094             fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory() failed\n");
1095           return 0;
1096         }
1097
1098       c = serial_readchar (sdi_desc, SDI_TIMEOUT);
1099       if (c < 0 || c == '-')
1100         {
1101           if (remote_debug)
1102             fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory() failed\n");
1103           return 0;
1104         }
1105
1106       ret = recv_data (myaddr, len);
1107     }
1108
1109   if (ret <= 0)
1110     {
1111       if (remote_debug)
1112         fprintf_unfiltered (gdb_stdlog, "m32r_xfer_memory() fails\n");
1113       return 0;
1114     }
1115
1116   return ret;
1117 }
1118
1119 static void
1120 m32r_kill (struct target_ops *ops)
1121 {
1122   if (remote_debug)
1123     fprintf_unfiltered (gdb_stdlog, "m32r_kill()\n");
1124
1125   inferior_ptid = null_ptid;
1126   delete_thread_silent (remote_m32r_ptid);
1127
1128   return;
1129 }
1130
1131 /* Clean up when a program exits.
1132
1133    The program actually lives on in the remote processor's RAM, and may be
1134    run again without a download.  Don't leave it full of breakpoint
1135    instructions.  */
1136
1137 static void
1138 m32r_mourn_inferior (struct target_ops *ops)
1139 {
1140   if (remote_debug)
1141     fprintf_unfiltered (gdb_stdlog, "m32r_mourn_inferior()\n");
1142
1143   remove_breakpoints ();
1144   generic_mourn_inferior ();
1145 }
1146
1147 static int
1148 m32r_insert_breakpoint (struct gdbarch *gdbarch,
1149                         struct bp_target_info *bp_tgt)
1150 {
1151   CORE_ADDR addr = bp_tgt->placed_address;
1152   int ib_breakpoints;
1153   unsigned char buf[13];
1154   int i, c;
1155
1156   if (remote_debug)
1157     fprintf_unfiltered (gdb_stdlog, "m32r_insert_breakpoint(%s,...)\n",
1158                         paddress (gdbarch, addr));
1159
1160   if (use_ib_breakpoints)
1161     ib_breakpoints = max_ib_breakpoints;
1162   else
1163     ib_breakpoints = 0;
1164
1165   for (i = 0; i < MAX_BREAKPOINTS; i++)
1166     {
1167       if (bp_address[i] == 0xffffffff)
1168         {
1169           bp_address[i] = addr;
1170           if (i >= ib_breakpoints)
1171             {
1172               buf[0] = SDI_READ_MEMORY;
1173               if (mmu_on)
1174                 store_long_parameter (buf + 1, addr & 0xfffffffc);
1175               else
1176                 store_long_parameter (buf + 1, addr & 0x7ffffffc);
1177               store_long_parameter (buf + 5, 4);
1178               serial_write (sdi_desc, buf, 9);
1179               c = serial_readchar (sdi_desc, SDI_TIMEOUT);
1180               if (c != '-')
1181                 recv_data (bp_data[i], 4);
1182             }
1183           return 0;
1184         }
1185     }
1186
1187   error (_("Too many breakpoints"));
1188   return 1;
1189 }
1190
1191 static int
1192 m32r_remove_breakpoint (struct gdbarch *gdbarch,
1193                         struct bp_target_info *bp_tgt)
1194 {
1195   CORE_ADDR addr = bp_tgt->placed_address;
1196   int i;
1197
1198   if (remote_debug)
1199     fprintf_unfiltered (gdb_stdlog, "m32r_remove_breakpoint(%s)\n",
1200                         paddress (gdbarch, addr));
1201
1202   for (i = 0; i < MAX_BREAKPOINTS; i++)
1203     {
1204       if (bp_address[i] == addr)
1205         {
1206           bp_address[i] = 0xffffffff;
1207           break;
1208         }
1209     }
1210
1211   return 0;
1212 }
1213
1214 static void
1215 m32r_load (char *args, int from_tty)
1216 {
1217   struct cleanup *old_chain;
1218   asection *section;
1219   bfd *pbfd;
1220   bfd_vma entry;
1221   char *filename;
1222   int quiet;
1223   int nostart;
1224   struct timeval start_time, end_time;
1225   unsigned long data_count;     /* Number of bytes transferred to memory.  */
1226   static RETSIGTYPE (*prev_sigint) ();
1227
1228   /* for direct tcp connections, we can do a fast binary download.  */
1229   quiet = 0;
1230   nostart = 0;
1231   filename = NULL;
1232
1233   while (*args != '\000')
1234     {
1235       char *arg;
1236
1237       while (isspace (*args))
1238         args++;
1239
1240       arg = args;
1241
1242       while ((*args != '\000') && !isspace (*args))
1243         args++;
1244
1245       if (*args != '\000')
1246         *args++ = '\000';
1247
1248       if (*arg != '-')
1249         filename = arg;
1250       else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
1251         quiet = 1;
1252       else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
1253         nostart = 1;
1254       else
1255         error (_("Unknown option `%s'"), arg);
1256     }
1257
1258   if (!filename)
1259     filename = get_exec_file (1);
1260
1261   pbfd = gdb_bfd_open (filename, gnutarget, -1);
1262   if (pbfd == NULL)
1263     {
1264       perror_with_name (filename);
1265       return;
1266     }
1267   old_chain = make_cleanup_bfd_unref (pbfd);
1268
1269   if (!bfd_check_format (pbfd, bfd_object))
1270     error (_("\"%s\" is not an object file: %s"), filename,
1271            bfd_errmsg (bfd_get_error ()));
1272
1273   gettimeofday (&start_time, NULL);
1274   data_count = 0;
1275
1276   interrupted = 0;
1277   prev_sigint = signal (SIGINT, gdb_cntrl_c);
1278
1279   for (section = pbfd->sections; section; section = section->next)
1280     {
1281       if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
1282         {
1283           bfd_vma section_address;
1284           bfd_size_type section_size;
1285           file_ptr fptr;
1286           int n;
1287
1288           section_address = bfd_section_lma (pbfd, section);
1289           section_size = bfd_get_section_size (section);
1290
1291           if (!mmu_on)
1292             {
1293               if ((section_address & 0xa0000000) == 0x80000000)
1294                 section_address &= 0x7fffffff;
1295             }
1296
1297           if (!quiet)
1298             printf_filtered ("[Loading section %s at 0x%lx (%d bytes)]\n",
1299                              bfd_get_section_name (pbfd, section),
1300                              (unsigned long) section_address,
1301                              (int) section_size);
1302
1303           fptr = 0;
1304
1305           data_count += section_size;
1306
1307           n = 0;
1308           while (section_size > 0)
1309             {
1310               char unsigned buf[0x1000 + 9];
1311               int count;
1312
1313               count = min (section_size, 0x1000);
1314
1315               buf[0] = SDI_WRITE_MEMORY;
1316               store_long_parameter (buf + 1, section_address);
1317               store_long_parameter (buf + 5, count);
1318
1319               bfd_get_section_contents (pbfd, section, buf + 9, fptr, count);
1320               if (send_data (buf, count + 9) <= 0)
1321                 error (_("Error while downloading %s section."),
1322                        bfd_get_section_name (pbfd, section));
1323
1324               if (!quiet)
1325                 {
1326                   printf_unfiltered (".");
1327                   if (n++ > 60)
1328                     {
1329                       printf_unfiltered ("\n");
1330                       n = 0;
1331                     }
1332                   gdb_flush (gdb_stdout);
1333                 }
1334
1335               section_address += count;
1336               fptr += count;
1337               section_size -= count;
1338
1339               if (interrupted)
1340                 break;
1341             }
1342
1343           if (!quiet && !interrupted)
1344             {
1345               printf_unfiltered ("done.\n");
1346               gdb_flush (gdb_stdout);
1347             }
1348         }
1349
1350       if (interrupted)
1351         {
1352           printf_unfiltered ("Interrupted.\n");
1353           break;
1354         }
1355     }
1356
1357   interrupted = 0;
1358   signal (SIGINT, prev_sigint);
1359
1360   gettimeofday (&end_time, NULL);
1361
1362   /* Make the PC point at the start address.  */
1363   if (exec_bfd)
1364     regcache_write_pc (get_current_regcache (),
1365                        bfd_get_start_address (exec_bfd));
1366
1367   inferior_ptid = null_ptid;    /* No process now.  */
1368   delete_thread_silent (remote_m32r_ptid);
1369
1370   /* This is necessary because many things were based on the PC at the time
1371      that we attached to the monitor, which is no longer valid now that we
1372      have loaded new code (and just changed the PC).  Another way to do this
1373      might be to call normal_stop, except that the stack may not be valid,
1374      and things would get horribly confused...  */
1375
1376   clear_symtab_users (0);
1377
1378   if (!nostart)
1379     {
1380       entry = bfd_get_start_address (pbfd);
1381
1382       if (!quiet)
1383         printf_unfiltered ("[Starting %s at 0x%lx]\n", filename,
1384                            (unsigned long) entry);
1385     }
1386
1387   print_transfer_performance (gdb_stdout, data_count, 0, &start_time,
1388                               &end_time);
1389
1390   do_cleanups (old_chain);
1391 }
1392
1393 static void
1394 m32r_stop (ptid_t ptid)
1395 {
1396   if (remote_debug)
1397     fprintf_unfiltered (gdb_stdlog, "m32r_stop()\n");
1398
1399   send_cmd (SDI_STOP_CPU);
1400
1401   return;
1402 }
1403
1404
1405 /* Tell whether this target can support a hardware breakpoint.  CNT
1406    is the number of hardware breakpoints already installed.  This
1407    implements the target_can_use_hardware_watchpoint macro.  */
1408
1409 static int
1410 m32r_can_use_hw_watchpoint (int type, int cnt, int othertype)
1411 {
1412   return sdi_desc != NULL && cnt < max_access_breaks;
1413 }
1414
1415 /* Set a data watchpoint.  ADDR and LEN should be obvious.  TYPE is 0
1416    for a write watchpoint, 1 for a read watchpoint, or 2 for a read/write
1417    watchpoint.  */
1418
1419 static int
1420 m32r_insert_watchpoint (CORE_ADDR addr, int len, int type,
1421                         struct expression *cond)
1422 {
1423   int i;
1424
1425   if (remote_debug)
1426     fprintf_unfiltered (gdb_stdlog, "m32r_insert_watchpoint(%s,%d,%d)\n",
1427                         paddress (target_gdbarch (), addr), len, type);
1428
1429   for (i = 0; i < MAX_ACCESS_BREAKS; i++)
1430     {
1431       if (ab_address[i] == 0x00000000)
1432         {
1433           ab_address[i] = addr;
1434           ab_size[i] = len;
1435           ab_type[i] = type;
1436           return 0;
1437         }
1438     }
1439
1440   error (_("Too many watchpoints"));
1441   return 1;
1442 }
1443
1444 static int
1445 m32r_remove_watchpoint (CORE_ADDR addr, int len, int type,
1446                         struct expression *cond)
1447 {
1448   int i;
1449
1450   if (remote_debug)
1451     fprintf_unfiltered (gdb_stdlog, "m32r_remove_watchpoint(%s,%d,%d)\n",
1452                         paddress (target_gdbarch (), addr), len, type);
1453
1454   for (i = 0; i < MAX_ACCESS_BREAKS; i++)
1455     {
1456       if (ab_address[i] == addr)
1457         {
1458           ab_address[i] = 0x00000000;
1459           break;
1460         }
1461     }
1462
1463   return 0;
1464 }
1465
1466 static int
1467 m32r_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
1468 {
1469   int rc = 0;
1470
1471   if (hit_watchpoint_addr != 0x00000000)
1472     {
1473       *addr_p = hit_watchpoint_addr;
1474       rc = 1;
1475     }
1476   return rc;
1477 }
1478
1479 static int
1480 m32r_stopped_by_watchpoint (void)
1481 {
1482   CORE_ADDR addr;
1483
1484   return m32r_stopped_data_address (&current_target, &addr);
1485 }
1486
1487 /* Check to see if a thread is still alive.  */
1488
1489 static int
1490 m32r_thread_alive (struct target_ops *ops, ptid_t ptid)
1491 {
1492   if (ptid_equal (ptid, remote_m32r_ptid))
1493     /* The main task is always alive.  */
1494     return 1;
1495
1496   return 0;
1497 }
1498
1499 /* Convert a thread ID to a string.  Returns the string in a static
1500    buffer.  */
1501
1502 static char *
1503 m32r_pid_to_str (struct target_ops *ops, ptid_t ptid)
1504 {
1505   static char buf[64];
1506
1507   if (ptid_equal (remote_m32r_ptid, ptid))
1508     {
1509       xsnprintf (buf, sizeof buf, "Thread <main>");
1510       return buf;
1511     }
1512
1513   return normal_pid_to_str (ptid);
1514 }
1515
1516 static void
1517 sdireset_command (char *args, int from_tty)
1518 {
1519   if (remote_debug)
1520     fprintf_unfiltered (gdb_stdlog, "m32r_sdireset()\n");
1521
1522   send_cmd (SDI_OPEN);
1523
1524   inferior_ptid = null_ptid;
1525   delete_thread_silent (remote_m32r_ptid);
1526 }
1527
1528
1529 static void
1530 sdistatus_command (char *args, int from_tty)
1531 {
1532   unsigned char buf[4096];
1533   int i, c;
1534
1535   if (remote_debug)
1536     fprintf_unfiltered (gdb_stdlog, "m32r_sdireset()\n");
1537
1538   if (!sdi_desc)
1539     return;
1540
1541   send_cmd (SDI_STATUS);
1542   for (i = 0; i < 4096; i++)
1543     {
1544       c = serial_readchar (sdi_desc, SDI_TIMEOUT);
1545       if (c < 0)
1546         return;
1547       buf[i] = c;
1548       if (c == 0)
1549         break;
1550     }
1551
1552   printf_filtered ("%s", buf);
1553 }
1554
1555
1556 static void
1557 debug_chaos_command (char *args, int from_tty)
1558 {
1559   unsigned char buf[3];
1560
1561   buf[0] = SDI_SET_ATTR;
1562   buf[1] = SDI_ATTR_CACHE;
1563   buf[2] = SDI_CACHE_TYPE_CHAOS;
1564   send_data (buf, 3);
1565 }
1566
1567
1568 static void
1569 use_debug_dma_command (char *args, int from_tty)
1570 {
1571   unsigned char buf[3];
1572
1573   buf[0] = SDI_SET_ATTR;
1574   buf[1] = SDI_ATTR_MEM_ACCESS;
1575   buf[2] = SDI_MEM_ACCESS_DEBUG_DMA;
1576   send_data (buf, 3);
1577 }
1578
1579 static void
1580 use_mon_code_command (char *args, int from_tty)
1581 {
1582   unsigned char buf[3];
1583
1584   buf[0] = SDI_SET_ATTR;
1585   buf[1] = SDI_ATTR_MEM_ACCESS;
1586   buf[2] = SDI_MEM_ACCESS_MON_CODE;
1587   send_data (buf, 3);
1588 }
1589
1590
1591 static void
1592 use_ib_breakpoints_command (char *args, int from_tty)
1593 {
1594   use_ib_breakpoints = 1;
1595 }
1596
1597 static void
1598 use_dbt_breakpoints_command (char *args, int from_tty)
1599 {
1600   use_ib_breakpoints = 0;
1601 }
1602
1603 static int
1604 m32r_return_one (struct target_ops *target)
1605 {
1606   return 1;
1607 }
1608
1609 /* Implementation of the to_has_execution method.  */
1610
1611 static int
1612 m32r_has_execution (struct target_ops *target, ptid_t the_ptid)
1613 {
1614   return 1;
1615 }
1616
1617 /* Define the target subroutine names.  */
1618
1619 struct target_ops m32r_ops;
1620
1621 static void
1622 init_m32r_ops (void)
1623 {
1624   m32r_ops.to_shortname = "m32rsdi";
1625   m32r_ops.to_longname = "Remote M32R debugging over SDI interface";
1626   m32r_ops.to_doc = "Use an M32R board using SDI debugging protocol.";
1627   m32r_ops.to_open = m32r_open;
1628   m32r_ops.to_close = m32r_close;
1629   m32r_ops.to_detach = m32r_detach;
1630   m32r_ops.to_resume = m32r_resume;
1631   m32r_ops.to_wait = m32r_wait;
1632   m32r_ops.to_fetch_registers = m32r_fetch_register;
1633   m32r_ops.to_store_registers = m32r_store_register;
1634   m32r_ops.to_prepare_to_store = m32r_prepare_to_store;
1635   m32r_ops.deprecated_xfer_memory = m32r_xfer_memory;
1636   m32r_ops.to_files_info = m32r_files_info;
1637   m32r_ops.to_insert_breakpoint = m32r_insert_breakpoint;
1638   m32r_ops.to_remove_breakpoint = m32r_remove_breakpoint;
1639   m32r_ops.to_can_use_hw_breakpoint = m32r_can_use_hw_watchpoint;
1640   m32r_ops.to_insert_watchpoint = m32r_insert_watchpoint;
1641   m32r_ops.to_remove_watchpoint = m32r_remove_watchpoint;
1642   m32r_ops.to_stopped_by_watchpoint = m32r_stopped_by_watchpoint;
1643   m32r_ops.to_stopped_data_address = m32r_stopped_data_address;
1644   m32r_ops.to_kill = m32r_kill;
1645   m32r_ops.to_load = m32r_load;
1646   m32r_ops.to_create_inferior = m32r_create_inferior;
1647   m32r_ops.to_mourn_inferior = m32r_mourn_inferior;
1648   m32r_ops.to_stop = m32r_stop;
1649   m32r_ops.to_log_command = serial_log_command;
1650   m32r_ops.to_thread_alive = m32r_thread_alive;
1651   m32r_ops.to_pid_to_str = m32r_pid_to_str;
1652   m32r_ops.to_stratum = process_stratum;
1653   m32r_ops.to_has_all_memory = m32r_return_one;
1654   m32r_ops.to_has_memory = m32r_return_one;
1655   m32r_ops.to_has_stack = m32r_return_one;
1656   m32r_ops.to_has_registers = m32r_return_one;
1657   m32r_ops.to_has_execution = m32r_has_execution;
1658   m32r_ops.to_magic = OPS_MAGIC;
1659 };
1660
1661
1662 extern initialize_file_ftype _initialize_remote_m32r;
1663
1664 void
1665 _initialize_remote_m32r (void)
1666 {
1667   int i;
1668
1669   init_m32r_ops ();
1670
1671   /* Initialize breakpoints.  */
1672   for (i = 0; i < MAX_BREAKPOINTS; i++)
1673     bp_address[i] = 0xffffffff;
1674
1675   /* Initialize access breaks.  */
1676   for (i = 0; i < MAX_ACCESS_BREAKS; i++)
1677     ab_address[i] = 0x00000000;
1678
1679   add_target (&m32r_ops);
1680
1681   add_com ("sdireset", class_obscure, sdireset_command,
1682            _("Reset SDI connection."));
1683
1684   add_com ("sdistatus", class_obscure, sdistatus_command,
1685            _("Show status of SDI connection."));
1686
1687   add_com ("debug_chaos", class_obscure, debug_chaos_command,
1688            _("Debug M32R/Chaos."));
1689
1690   add_com ("use_debug_dma", class_obscure, use_debug_dma_command,
1691            _("Use debug DMA mem access."));
1692   add_com ("use_mon_code", class_obscure, use_mon_code_command,
1693            _("Use mon code mem access."));
1694
1695   add_com ("use_ib_break", class_obscure, use_ib_breakpoints_command,
1696            _("Set breakpoints by IB break."));
1697   add_com ("use_dbt_break", class_obscure, use_dbt_breakpoints_command,
1698            _("Set breakpoints by dbt."));
1699
1700   /* Yes, 42000 is arbitrary.  The only sense out of it, is that it
1701      isn't 0.  */
1702   remote_m32r_ptid = ptid_build (42000, 0, 42000);
1703 }