gdb/v850ice.c

   1 /* ICE interface for the NEC V850 for GDB, the GNU debugger.
   2    Copyright 1996, Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Pessublic License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #include "defs.h"
  21 #include "gdb_string.h"
  22 #include "frame.h"
  23 #include "symtab.h"
  24 #include "inferior.h"
  25 #include "breakpoint.h"
  26 #include "symfile.h"
  27 #include "target.h"
  28 #include "objfiles.h"
  29 #include "gdbcore.h"
  30 #include "value.h"
  31 #include "command.h"
  32
  33 #include <tcl.h>
  34 #include <tk.h>
  35 #include <windows.h>
  36 #include <winuser.h> /* for WM_USER */
  37
  38 extern unsigned long int strtoul(const char *nptr, char **endptr,
  39                                  int base);
  40
  41 /* Local data definitions */
  42 struct MessageIO
  43 {
  44   int    size;   /* length of input or output in bytes         */
  45   char * buf;    /* buffer having the input/output information */
  46 };
  47
  48 /* Prototypes for functions located in other files */
  49 extern void break_command PARAMS ((char *, int));
  50
  51 extern void stepi_command PARAMS ((char *, int));
  52
  53 extern void nexti_command PARAMS ((char *, int));
  54
  55 extern void continue_command PARAMS ((char *, int));
  56
  57 extern HINSTANCE Tk_GetHINSTANCE PARAMS ((void));
  58
  59 extern void (*ui_loop_hook) PARAMS ((int));
  60
  61 /* Prototypes for local functions */
  62 static int init_hidden_window PARAMS ((void));
  63
  64 static LRESULT CALLBACK v850ice_wndproc PARAMS ((HWND, UINT, WPARAM, LPARAM));
  65
  66 static void v850ice_files_info PARAMS ((struct target_ops *ignore));
  67
  68 static int v850ice_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr,
  69                                         int len, int should_write,
  70                                         struct target_ops *target));
  71
  72 static void v850ice_prepare_to_store PARAMS ((void));
  73
  74 static void v850ice_fetch_registers PARAMS ((int regno));
  75
  76 static void v850ice_resume PARAMS ((int pid, int step,
  77                                    enum target_signal siggnal));
  78
  79 static void v850ice_open PARAMS ((char *name, int from_tty));
  80
  81 static void v850ice_close PARAMS ((int quitting));
  82
  83 static void v850ice_stop PARAMS ((void));
  84
  85 static void v850ice_store_registers PARAMS ((int regno));
  86
  87 static void v850ice_mourn PARAMS ((void));
  88
  89 static int v850ice_wait PARAMS ((int pid, struct target_waitstatus *status));
  90
  91 static void v850ice_kill PARAMS ((void));
  92
  93 static void v850ice_detach PARAMS ((char *args, int from_tty));
  94
  95 static int v850ice_insert_breakpoint PARAMS ((CORE_ADDR, char *));
  96
  97 static int v850ice_remove_breakpoint PARAMS ((CORE_ADDR, char *));
  98
  99 static void v850ice_command PARAMS ((char *, int));
 100
 101 static int ice_disassemble PARAMS ((unsigned long, int, char *));
 102
 103 static int ice_lookup_addr PARAMS ((unsigned long *, char *, char *));
 104
 105 static int ice_lookup_symbol PARAMS ((unsigned long, char *));
 106
 107 static void ice_SimulateDisassemble PARAMS ((char *, int));
 108
 109 static void ice_SimulateAddrLookup PARAMS ((char *, int));
 110
 111 static void ice_Simulate_SymLookup PARAMS ((char *, int));
 112
 113 static void ice_fputs PARAMS ((const char *, GDB_FILE *));
 114
 115 static int ice_file PARAMS ((char *));
 116
 117 static int ice_cont PARAMS ((char *));
 118
 119 static int ice_stepi PARAMS ((char *));
 120
 121 static int ice_nexti PARAMS ((char *));
 122
 123 static void togdb_force_update PARAMS ((void));
 124
 125 static void view_source PARAMS ((CORE_ADDR));
 126
 127 /* Globals */
 128 static HWND hidden_hwnd;                 /* HWND for messages */
 129
 130 long (__stdcall *ExeAppReq) PARAMS ((char *, long, char *, struct MessageIO *));
 131
 132 long (__stdcall *RegisterClient) PARAMS ((HWND));
 133
 134 long (__stdcall *UnregisterClient) PARAMS ((void));
 135
 136 extern Tcl_Interp *gdbtk_interp;
 137
 138 /* Globals local to this file only */
 139 static int ice_open = 0;        /* Is ICE open? */
 140
 141 static char * v850_CB_Result;   /* special char array for saving 'callback' results */
 142
 143 static int SimulateCallback;    /* simulate a callback event */
 144
 145 #define MAX_BLOCK_SIZE    64*1024   /* Cannot transfer memory in blocks bigger
 146                                        than this */
 147 /* MDI/ICE Message IDs */
 148 #define GSINGLESTEP     0x200   /* single-step target          */
 149 #define GRESUME         0x201   /* resume target               */
 150 #define GREADREG        0x202   /* read a register             */
 151 #define GWRITEREG       0x203   /* write a register            */
 152 #define GWRITEBLOCK     0x204   /* write a block of memory     */
 153 #define GREADBLOCK      0x205   /* read a block of memory      */
 154 #define GSETBREAK       0x206   /* set a breakpoint            */
 155 #define GREMOVEBREAK    0x207   /* remove a breakpoint         */
 156 #define GHALT           0x208   /* ??? */
 157 #define GCHECKSTATUS    0x209   /* check status of ICE         */
 158 #define GMDIREPLY       0x210   /* Reply for previous query - NOT USED */
 159 #define GDOWNLOAD       0x211   /* something for MDI           */
 160 #define GCOMMAND        0x212   /* execute command in ice      */
 161 #define GLOADFILENAME   0x213   /* retrieve load filename      */
 162 #define GWRITEMEM       0x214   /* write word, half-word, or byte */
 163
 164 /* GCHECKSTATUS return codes: */
 165 #define ICE_Idle        0x00
 166 #define ICE_Breakpoint  0x01    /* hit a breakpoint */
 167 #define ICE_Stepped     0x02    /* have stepped     */
 168 #define ICE_Exception   0x03    /* have exception   */
 169 #define ICE_Halted      0x04    /* hit a user halt  */
 170 #define ICE_Exited      0x05    /* called exit      */
 171 #define ICE_Terminated  0x06    /* user terminated  */
 172 #define ICE_Running     0x07
 173 #define ICE_Unknown     0x99
 174
 175 /* Windows messages */
 176 #define WM_STATE_CHANGE WM_USER+101
 177 #define WM_SYM_TO_ADDR  WM_USER+102
 178 #define WM_ADDR_TO_SYM  WM_USER+103
 179 #define WM_DISASSEMBLY  WM_USER+104
 180 #define WM_SOURCE       WM_USER+105
 181
 182 /* STATE_CHANGE codes */
 183 #define STATE_CHANGE_REGS   1   /* Register(s) changed */
 184 #define STATE_CHANGE_LOAD   2   /* HW reset            */
 185 #define STATE_CHANGE_RESET  3   /* Load new file       */
 186 #define STATE_CHANGE_CONT   4   /* Run target          */
 187 #define STATE_CHANGE_STOP   5   /* Stop target         */
 188 #define STATE_CHANGE_STEPI  6   /* Stepi target        */
 189 #define STATE_CHANGE_NEXTI  7   /* Nexti target        */
 190
 191 static struct target_ops v850ice_ops;   /* Forward decl */
 192
 193 /* This function creates a hidden window */
 194 static int
 195 init_hidden_window ()
 196 {
 197   WNDCLASS class;
 198
 199   if (hidden_hwnd != NULL)
 200     return TCL_OK;
 201
 202   class.style = 0;
 203   class.cbClsExtra = 0;
 204   class.cbWndExtra = 0;
 205   class.hInstance = Tk_GetHINSTANCE();
 206   class.hbrBackground = NULL;
 207   class.lpszMenuName = NULL;
 208   class.lpszClassName = "gdbtk_v850ice";
 209   class.lpfnWndProc = v850ice_wndproc;
 210   class.hIcon = NULL;
 211   class.hCursor = NULL;
 212
 213   if (! RegisterClass (&class))
 214     return TCL_ERROR;
 215
 216   hidden_hwnd = CreateWindow ("gdbtk_v850ice", "gdbtk_v850ice", WS_TILED,
 217                               0, 0, 0, 0, NULL, NULL, class.hInstance,
 218                               NULL);
 219   if (hidden_hwnd == NULL)
 220     {
 221       char buf[200];
 222       DWORD err;
 223
 224       err = GetLastError ();
 225       FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, err,
 226                      0, buf, 200, NULL);
 227       printf_unfiltered ("Could not create window: %s", buf);
 228       return TCL_ERROR;
 229     }
 230
 231   return TCL_OK;
 232 }
 233
 234 /*
 235    This function is installed as the message handler for the hidden window
 236    which QBox will use to communicate with gdbtk. It recognize and acts
 237    on the following messages:
 238
 239    WM_SYM_TO_ADDR  \
 240    WM_ADDR_TO_SYM   | Not implemented at NEC's request
 241    WM_DISASSEMBLY  /
 242    WM_STATE_CHANGE - tells us that a state change has occured in the ICE
 243 */
 244 static LRESULT CALLBACK
 245 v850ice_wndproc (hwnd, message, wParam, lParam)
 246      HWND hwnd;
 247      UINT message;
 248      WPARAM wParam;
 249      LPARAM lParam;
 250 {
 251   LRESULT result = FALSE;
 252
 253   switch (message)
 254     {
 255     case WM_SYM_TO_ADDR:
 256       MessageBox (0, "Symbol resolution\nNot implemented", "GDB", MB_OK);
 257       break;
 258     case WM_ADDR_TO_SYM:
 259       MessageBox (0, "Address resolution\nNot implemented", "GDB", MB_OK);
 260       break;
 261     case WM_SOURCE:
 262       view_source ((CORE_ADDR) lParam);
 263       break;
 264     case WM_STATE_CHANGE:
 265       switch (wParam)
 266         {
 267         case STATE_CHANGE_LOAD:
 268           {
 269             struct MessageIO iob;
 270             char buf[128];
 271
 272             iob.buf  = buf;
 273             iob.size = 128;
 274
 275             /* Load in a new file... Need filename */
 276             ExeAppReq ("GDB", GLOADFILENAME, NULL, &iob);
 277             if (!catch_errors (ice_file, iob.buf, "", RETURN_MASK_ALL))
 278               printf_unfiltered ("load errored\n");
 279           }
 280           break;
 281         case STATE_CHANGE_RESET:
 282           registers_changed ();
 283           flush_cached_frames ();
 284           togdb_force_update ();
 285           result = TRUE;
 286           break;
 287         case STATE_CHANGE_REGS:
 288           registers_changed ();
 289           togdb_force_update ();
 290           result = TRUE;
 291           break;
 292         case STATE_CHANGE_CONT:
 293           if (!catch_errors (ice_cont, NULL, "", RETURN_MASK_ALL))
 294             printf_unfiltered ("continue errored\n");
 295           result = TRUE;
 296           break;
 297         case STATE_CHANGE_STEPI:
 298           if (!catch_errors (ice_stepi, (PTR)(int) lParam, "",
 299                              RETURN_MASK_ALL))
 300             printf_unfiltered ("stepi errored\n");
 301           result = TRUE;
 302           break;
 303         case STATE_CHANGE_NEXTI:
 304           if (!catch_errors (ice_nexti, (PTR)(int) lParam, "",
 305                              RETURN_MASK_ALL))
 306             printf_unfiltered ("nexti errored\n");
 307           result = TRUE;
 308           break;
 309         }
 310     }
 311
 312   if (result == FALSE)
 313     return DefWindowProc (hwnd, message, wParam, lParam);
 314
 315   return FALSE;
 316 }
 317
 318 /* Code for opening a connection to the ICE.  */
 319
 320 static void
 321 v850ice_open (name, from_tty)
 322      char *name;
 323      int from_tty;
 324 {
 325   HINSTANCE handle;
 326
 327   if (name)
 328     error ("Too many arguments.");
 329
 330   target_preopen (from_tty);
 331
 332   unpush_target (&v850ice_ops);
 333
 334   if (from_tty)
 335     puts_filtered ("V850ice debugging\n");
 336
 337   push_target (&v850ice_ops);   /* Switch to using v850ice target now */
 338
 339   target_terminal_init ();
 340
 341   /* Initialize everything necessary to facilitate communication
 342      between QBox, gdbtk, and the DLLs which control the ICE */
 343   if (ExeAppReq == NULL)
 344     {
 345       handle = LoadLibrary ("necmsg.dll");
 346       if (handle == NULL)
 347         error ("Cannot load necmsg.dll");
 348
 349       ExeAppReq = (long (*) PARAMS ((char *, long, char *, struct MessageIO *)))
 350         GetProcAddress (handle, "ExeAppReq");
 351       RegisterClient = (long (*) PARAMS ((HWND)))
 352         GetProcAddress (handle, "RegisterClient");
 353       UnregisterClient = (long (*) PARAMS ((void)))
 354         GetProcAddress (handle, "UnregisterClient");
 355
 356       if (ExeAppReq == NULL || RegisterClient == NULL || UnregisterClient == NULL)
 357         error ("Could not find requisite functions in necmsg.dll.");
 358
 359       if (init_hidden_window () != TCL_OK)
 360         error ("could not initialize message handling");
 361     }
 362
 363   /* Tell the DLL we are here */
 364   RegisterClient (hidden_hwnd);
 365
 366   ice_open = 1;
 367
 368   /* Without this, some commands which require an active target (such as kill)
 369      won't work.  This variable serves (at least) double duty as both the pid
 370      of the target process (if it has such), and as a flag indicating that a
 371      target is active.  These functions should be split out into seperate
 372      variables, especially since GDB will someday have a notion of debugging
 373      several processes.  */
 374   inferior_pid = 42000;
 375
 376   start_remote ();
 377   return;
 378 }
 379
 380 /* Clean up connection to a remote debugger.  */
 381
 382 /* ARGSUSED */
 383 static void
 384 v850ice_close (quitting)
 385      int quitting;
 386 {
 387   if (ice_open)
 388     {
 389       UnregisterClient ();
 390       ice_open = 0;
 391       inferior_pid = 0;
 392     }
 393 }
 394
 395 /* Stop the process on the ice. */
 396 static void
 397 v850ice_stop ()
 398 {
 399   /* This is silly, but it works... */
 400   v850ice_command ("stop", 0);
 401 }
 402
 403 static void
 404 v850ice_detach (args, from_tty)
 405      char *args;
 406      int from_tty;
 407 {
 408   if (args)
 409     error ("Argument given to \"detach\" when remotely debugging.");
 410
 411   pop_target ();
 412   if (from_tty)
 413     puts_filtered ("Ending v850ice debugging.\n");
 414 }
 415
 416 /* Tell the remote machine to resume.  */
 417
 418 static void
 419 v850ice_resume (pid, step, siggnal)
 420      int pid, step;
 421      enum target_signal siggnal;
 422 {
 423   long              retval;
 424   char              buf[256];
 425   struct MessageIO  iob;
 426
 427   iob.size = 0;
 428   iob.buf  = buf;
 429
 430   if (step)
 431     retval = ExeAppReq ("GDB", GSINGLESTEP, "step", &iob);
 432   else
 433     retval = ExeAppReq ("GDB", GRESUME, "run", &iob);
 434
 435   if (retval)
 436     error ("ExeAppReq (step = %d) returned %d", step, retval);
 437 }
 438
 439 /* Wait until the remote machine stops, then return,
 440    storing status in STATUS just as `wait' would.
 441    Returns "pid" (though it's not clear what, if anything, that
 442    means in the case of this target).  */
 443
 444 static int
 445 v850ice_wait (pid, status)
 446      int pid;
 447      struct target_waitstatus *status;
 448 {
 449   long v850_status;
 450   char buf[256];
 451   struct MessageIO  iob;
 452   int done = 0;
 453   int count = 0;
 454
 455   iob.size = 0;
 456   iob.buf  = buf;
 457
 458   do
 459     {
 460       if (count++ % 100000)
 461         {
 462           ui_loop_hook (-2);
 463           count = 0;
 464         }
 465
 466       v850_status = ExeAppReq ("GDB", GCHECKSTATUS, NULL, &iob);
 467
 468       switch (v850_status)
 469         {
 470         case ICE_Idle:
 471         case ICE_Breakpoint:
 472         case ICE_Stepped:
 473         case ICE_Halted:
 474           status->kind = TARGET_WAITKIND_STOPPED;
 475           status->value.sig = TARGET_SIGNAL_TRAP;
 476           done = 1;
 477           break;
 478         case ICE_Exception:
 479           status->kind = TARGET_WAITKIND_SIGNALLED;
 480           status->value.sig = TARGET_SIGNAL_SEGV;
 481           done = 1;
 482           break;
 483         case ICE_Exited:
 484           status->kind = TARGET_WAITKIND_EXITED;
 485           status->value.integer = 0;
 486           done = 1;
 487           break;
 488         case ICE_Terminated:
 489           status->kind = TARGET_WAITKIND_SIGNALLED;
 490           status->value.sig = TARGET_SIGNAL_KILL;
 491           done = 1;
 492           break;
 493         default:
 494           break;
 495         }
 496     }
 497   while (!done);
 498
 499   return inferior_pid;
 500 }
 501
 502 static int
 503 convert_register (regno, buf)
 504      int regno;
 505      char *buf;
 506 {
 507   if (regno <= 31)
 508     sprintf (buf, "r%d", regno);
 509   else if (reg_names[regno][0] == 's'
 510            && reg_names[regno][1] == 'r')
 511     return 0;
 512   else
 513     sprintf (buf, "%s", reg_names[regno]);
 514
 515   return 1;
 516 }
 517
 518 /* Read the remote registers into the block REGS.  */
 519 /* Note that the ICE returns register contents as ascii hex strings.  We have
 520    to convert that to an unsigned long, and then call store_unsigned_integer to
 521    convert it to target byte-order if necessary.  */
 522
 523 static void
 524 v850ice_fetch_registers (regno)
 525      int regno;
 526 {
 527   long retval;
 528   char cmd[100];
 529   char val[100];
 530   struct MessageIO iob;
 531   unsigned long regval;
 532   char *p;
 533
 534   if (regno == -1)
 535     {
 536       for (regno = 0; regno < NUM_REGS; regno++)
 537         v850ice_fetch_registers (regno);
 538       return;
 539     }
 540
 541   strcpy (cmd, "reg ");
 542   if (!convert_register (regno, &cmd[4]))
 543     return;
 544
 545   iob.size = sizeof val;
 546   iob.buf = val;
 547   retval = ExeAppReq ("GDB", GREADREG, cmd, &iob);
 548   if (retval)
 549     error ("1: ExeAppReq returned %d: cmd = %s", retval, cmd);
 550
 551   regval = strtoul (val, NULL, 16);
 552   if (regval == 0 && p == val)
 553     error ("v850ice_fetch_registers (%d):  bad value from ICE: %s.",
 554            regno, val);
 555
 556   store_unsigned_integer (val, REGISTER_RAW_SIZE (regno), regval);
 557   supply_register (regno, val);
 558 }
 559
 560 /* Store register REGNO, or all registers if REGNO == -1, from the contents
 561    of REGISTERS.  */
 562
 563 static void
 564 v850ice_store_registers (regno)
 565      int regno;
 566 {
 567   long retval;
 568   char cmd[100];
 569   unsigned long regval;
 570   char buf[256];
 571   struct MessageIO iob;
 572   iob.size = 0;
 573   iob.buf = buf;
 574
 575   if (regno == -1)
 576     {
 577       for (regno = 0; regno < NUM_REGS; regno++)
 578         v850ice_store_registers (regno);
 579       return;
 580     }
 581
 582   regval = extract_unsigned_integer (&registers[REGISTER_BYTE (regno)],
 583                                      REGISTER_RAW_SIZE (regno));
 584   strcpy (cmd, "reg ");
 585   if (!convert_register (regno, &cmd[4]))
 586     return;
 587   sprintf (cmd + strlen (cmd), "=0x%x", regval);
 588
 589   retval = ExeAppReq ("GDB", GWRITEREG, cmd, &iob);
 590   if (retval)
 591     error ("2: ExeAppReq returned %d: cmd = %s", retval, cmd);
 592 }
 593
 594 /* Prepare to store registers.  Nothing to do here, since the ICE can write one
 595    register at a time.  */
 596
 597 static void
 598 v850ice_prepare_to_store ()
 599 {
 600 }
 601
 602 /* Read or write LEN bytes from inferior memory at MEMADDR, transferring
 603    to or from debugger address MYADDR.  Write to inferior if SHOULD_WRITE is
 604    nonzero.  Returns length of data written or read; 0 for error.
 605
 606    We can only read/write MAX_BLOCK_SIZE bytes at a time, though, or the DLL
 607    dies */
 608 /* ARGSUSED */
 609 static int
 610 v850ice_xfer_memory (memaddr, myaddr, len, should_write, target)
 611      CORE_ADDR memaddr;
 612      char *myaddr;
 613      int len;
 614      int should_write;
 615      struct target_ops *target;                 /* ignored */
 616 {
 617   long retval;
 618   char cmd[100];
 619   struct MessageIO iob;
 620   int sent;
 621
 622   if (should_write)
 623     {
 624       if (len == 4 || len == 2 || len == 1)
 625         {
 626           long value = 0;
 627           char buf[256];
 628           char c;
 629
 630           iob.size = 0;
 631           iob.buf  = buf;
 632
 633           sent = 0;
 634           switch (len)
 635             {
 636             case 4:
 637               c = 'w';
 638               value |= (long) (myaddr[3] << 24) & 0xff000000;
 639               value |= (long) (myaddr[2] << 16) & 0x00ff0000;
 640               value |= (long) (myaddr[1] << 8)  & 0x0000ff00;
 641               value |= (long) myaddr[0] & 0x000000ff;
 642             case 2:
 643               c = 'h';
 644               value |= (long) myaddr[1] << 8 & 0xff00;
 645               value |= (long) myaddr[0] & 0x00ff;
 646               break;
 647             case 1:
 648               c = 'b';
 649               value |= (long) myaddr[0] & 0xff;
 650               break;
 651             }
 652
 653           sprintf (cmd, "memory %c c 0x%x=0x%x", c, (int) memaddr, value);
 654           retval = ExeAppReq ("GDB", GWRITEMEM, cmd, &iob);
 655           if (retval == 0)
 656             sent = len;
 657         }
 658       else
 659         {
 660           sent = 0;
 661           do
 662             {
 663               iob.size  = len > MAX_BLOCK_SIZE ? MAX_BLOCK_SIZE : len;
 664               iob.buf   = myaddr;
 665               sprintf (cmd, "memory b c 0x%x=0x00 l=%d", (int)memaddr, iob.size);
 666               retval = ExeAppReq ("GDB", GWRITEBLOCK, cmd, &iob);
 667               if (retval != 0)
 668                 break;
 669               len      -= iob.size;
 670               memaddr  += iob.size;
 671               myaddr   += iob.size;
 672               sent     += iob.size;
 673             }
 674           while (len > 0);
 675         }
 676     }
 677   else
 678     {
 679       unsigned char *tmp;
 680       unsigned char *t;
 681       int i;
 682
 683       tmp = alloca (len + 100);
 684       t = tmp;
 685       memset (tmp + len, 0xff, 100);
 686
 687       sent = 0;
 688       do
 689         {
 690           iob.size = len > MAX_BLOCK_SIZE ? MAX_BLOCK_SIZE : len;
 691           iob.buf  = tmp;
 692           sprintf (cmd, "memory b 0x%x l=%d", (int)memaddr, iob.size);
 693           retval = ExeAppReq ("GDB", GREADBLOCK, cmd, &iob);
 694           if (retval != 0)
 695             break;
 696           len     -= iob.size;
 697           memaddr += iob.size;
 698           sent    += iob.size;
 699           tmp     += iob.size;
 700         }
 701       while (len > 0);
 702
 703       if (retval == 0)
 704         {
 705           for (i = 0; i <  100; i++)
 706             {
 707               if (t[sent + i] != 0xff)
 708                 {
 709                   warning ("GREADBLOCK trashed bytes after transfer area.");
 710                   break;
 711                 }
 712             }
 713           memcpy (myaddr, t, sent);
 714         }
 715     }
 716
 717   if (retval != 0)
 718     error ("3: ExeAppReq returned %d: cmd = %s", retval, cmd);
 719
 720   return sent;
 721 }
 722
 723 static void
 724 v850ice_files_info (ignore)
 725      struct target_ops *ignore;
 726 {
 727   puts_filtered ("Debugging a target via the NEC V850 ICE.\n");
 728 }
 729
 730 static int
 731 v850ice_insert_breakpoint (addr, contents_cache)
 732      CORE_ADDR addr;
 733      char *contents_cache;
 734 {
 735   long retval;
 736   char cmd[100];
 737   char buf[256];
 738   struct MessageIO iob;
 739
 740   iob.size = 0;
 741   iob.buf  = buf;
 742   sprintf (cmd, "%d, ", addr);
 743
 744   retval = ExeAppReq ("GDB", GSETBREAK, cmd, &iob);
 745   if (retval)
 746     error ("ExeAppReq (GSETBREAK) returned %d: cmd = %s", retval, cmd);
 747
 748   return 0;
 749 }
 750
 751 static int
 752 v850ice_remove_breakpoint (addr, contents_cache)
 753      CORE_ADDR addr;
 754      char *contents_cache;
 755 {
 756   long retval;
 757   char cmd[100];
 758   char buf[256];
 759   struct MessageIO iob;
 760
 761   iob.size = 0;
 762   iob.buf  = buf;
 763
 764   sprintf (cmd, "%d, ", addr);
 765
 766   retval = ExeAppReq ("GDB", GREMOVEBREAK, cmd, &iob);
 767   if (retval)
 768     error ("ExeAppReq (GREMOVEBREAK) returned %d: cmd = %s", retval, cmd);
 769
 770   return 0;
 771 }
 772
 773 static void
 774 v850ice_kill ()
 775 {
 776   target_mourn_inferior ();
 777   inferior_pid = 0;
 778 }
 779
 780 static void
 781 v850ice_mourn ()
 782 {
 783 }
 784
 785 static void
 786 v850ice_load (filename, from_tty)
 787   char * filename;
 788   int from_tty;
 789 {
 790   struct MessageIO iob;
 791   char buf[256];
 792
 793   iob.size = 0;
 794   iob.buf  = buf;
 795   generic_load(filename, from_tty);
 796   ExeAppReq ("GDB", GDOWNLOAD, filename, &iob);
 797 }
 798
 799 static int
 800 ice_file (arg)
 801      char *arg;
 802 {
 803   char *s;
 804
 805   target_detach (NULL, 0);
 806   pop_target ();
 807
 808   printf_unfiltered ("\n");
 809
 810   s = arg;
 811   while (*s != '\0')
 812     {
 813       if (*s == '\\')
 814         *s = '/';
 815       s++;
 816     }
 817
 818   /* Safegaurd against confusing the breakpoint routines... */
 819   delete_command(NULL, 0);
 820
 821   /* Must supress from_tty, otherwise we could start asking if the
 822      user really wants to load a new symbol table, etc... */
 823   printf_unfiltered ("Reading symbols from %s...", arg);
 824   exec_file_command (arg, 0);
 825   symbol_file_command (arg, 0);
 826   printf_unfiltered ("done\n");
 827
 828   /* exec_file_command will kill our target, so reinstall the ICE as
 829      the target. */
 830   v850ice_open (NULL, 0);
 831
 832   togdb_force_update ();
 833   return 1;
 834 }
 835
 836 static int
 837 ice_cont (c)
 838   char *c;
 839 {
 840   printf_filtered ("continue (ice)");
 841   ReplyMessage ((LRESULT) 1);
 842   Tcl_Eval (gdbtk_interp, "gdb_immediate continue");
 843   return 1;
 844 }
 845
 846 static int
 847 ice_stepi (c)
 848   char *c;
 849 {
 850   char string[50] = "\0";
 851   int count = (int) c;
 852
 853   sprintf (string, "gdb_immediate stepi %d", count);
 854   printf_unfiltered ("stepi (ice)\n");
 855   ReplyMessage ((LRESULT) 1);
 856   Tcl_Eval (gdbtk_interp, string);
 857   return 1;
 858 }
 859
 860 static int
 861 ice_nexti (c)
 862   char *c;
 863 {
 864   char string[50] = "\0";
 865   int count = (int) c;
 866
 867   sprintf (string, "gdb_immediate nexti %d", count);
 868   printf_unfiltered ("nexti (ice)\n");
 869   ReplyMessage ((LRESULT) 1);
 870   Tcl_Eval (gdbtk_interp, string);
 871   return 1;
 872 }
 873
 874 static void
 875 v850ice_command (arg, from_tty)
 876   char *arg;
 877   int   from_tty;
 878 {
 879   struct MessageIO iob;
 880   char buf[256];
 881
 882   iob.buf = buf;
 883   iob.size = 0;
 884   ExeAppReq ("GDB", GCOMMAND, arg, &iob);
 885 }
 886
 887 static void
 888 togdb_force_update (void)
 889 {
 890   Tcl_Eval (gdbtk_interp, "gdbtk_update");
 891 }
 892
 893 static void
 894 view_source (addr)
 895      CORE_ADDR addr;
 896 {
 897   char c[256];
 898
 899   sprintf (c, "set src [lindex [manage find src] 0]\n$src location [gdb_loc *0x%x]", addr);
 900   Tcl_Eval (gdbtk_interp, c);
 901 }
 902
 903 /* Define the target subroutine names */
 904
 905 static void init_850ice_ops(void)
 906 {
 907   v850ice_ops.to_shortname   =   "ice";
 908   v850ice_ops.to_longname    =   "NEC V850 ICE interface";
 909   v850ice_ops.to_doc         =   "Debug a system controlled by a NEC 850 ICE.";
 910   v850ice_ops.to_open        =   v850ice_open;
 911   v850ice_ops.to_close       =   v850ice_close;
 912   v850ice_ops.to_attach      =   NULL;
 913   v850ice_ops.to_detach      =   v850ice_detach;
 914   v850ice_ops.to_resume      =   v850ice_resume;
 915   v850ice_ops.to_wait        =   v850ice_wait;
 916   v850ice_ops.to_fetch_registers  =   v850ice_fetch_registers;
 917   v850ice_ops.to_store_registers  =   v850ice_store_registers;
 918   v850ice_ops.to_prepare_to_store =   v850ice_prepare_to_store;
 919   v850ice_ops.to_xfer_memory =   v850ice_xfer_memory;
 920   v850ice_ops.to_files_info  =   v850ice_files_info;
 921   v850ice_ops.to_insert_breakpoint =   v850ice_insert_breakpoint;
 922   v850ice_ops.to_remove_breakpoint =   v850ice_remove_breakpoint;
 923   v850ice_ops.to_terminal_init    =   NULL;
 924   v850ice_ops.to_terminal_inferior =   NULL;
 925   v850ice_ops.to_terminal_ours_for_output =   NULL;
 926   v850ice_ops.to_terminal_ours   =   NULL;
 927   v850ice_ops.to_terminal_info   =   NULL;
 928   v850ice_ops.to_kill            =   v850ice_kill;
 929   v850ice_ops.to_load            =   v850ice_load;
 930   v850ice_ops.to_lookup_symbol   =   NULL;
 931   v850ice_ops.to_create_inferior =   NULL;
 932   v850ice_ops.to_mourn_inferior  =   v850ice_mourn;
 933   v850ice_ops.to_can_run         =   0;
 934   v850ice_ops.to_notice_signals  =   0;
 935   v850ice_ops.to_thread_alive    =    NULL;
 936   v850ice_ops.to_stop            =   v850ice_stop;
 937   v850ice_ops.to_stratum         =   process_stratum;
 938   v850ice_ops.DONT_USE           =   NULL;
 939   v850ice_ops.to_has_all_memory  =   1;
 940   v850ice_ops.to_has_memory      =   1;
 941   v850ice_ops.to_has_stack       =   1;
 942   v850ice_ops.to_has_registers   =   1;
 943   v850ice_ops.to_has_execution   =   1;
 944   v850ice_ops.to_sections        =   NULL;
 945   v850ice_ops.to_sections_end    =   NULL;
 946   v850ice_ops.to_magic           =   OPS_MAGIC  ;
 947 }
 948
 949 void
 950 _initialize_v850ice ()
 951 {
 952   init_850ice_ops ();
 953   add_target (&v850ice_ops);
 954
 955   add_com ("ice", class_obscure, v850ice_command,
 956            "Send command to ICE");
 957 }