gdb/remote-nindy.c

   1 /* Memory-access and commands for remote NINDY process, for GDB.
   2
   3    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999,
   4    2000, 2001, 2002 Free Software Foundation, Inc.
   5
   6    Contributed by Intel Corporation.  Modified from remote.c by Chris Benenati.
   7
   8    GDB is distributed in the hope that it will be useful, but WITHOUT ANY
   9    WARRANTY.  No author or distributor accepts responsibility to anyone
  10    for the consequences of using it or for whether it serves any
  11    particular purpose or works at all, unless he says so in writing.
  12    Refer to the GDB General Public License for full details.
  13
  14    Everyone is granted permission to copy, modify and redistribute GDB,
  15    but only under the conditions described in the GDB General Public
  16    License.  A copy of this license is supposed to have been given to you
  17    along with GDB so you can know your rights and responsibilities.  It
  18    should be in a file named COPYING.  Among other things, the copyright
  19    notice and this notice must be preserved on all copies.
  20
  21    In other words, go ahead and share GDB, but don't try to stop
  22    anyone else from sharing it farther.  Help stamp out software hoarding!  */
  23
  24 /*
  25    Except for the data cache routines, this file bears little resemblence
  26    to remote.c.  A new (although similar) protocol has been specified, and
  27    portions of the code are entirely dependent on having an i80960 with a
  28    NINDY ROM monitor at the other end of the line.
  29  */
  30
  31 /*****************************************************************************
  32  *
  33  * REMOTE COMMUNICATION PROTOCOL BETWEEN GDB960 AND THE NINDY ROM MONITOR.
  34  *
  35  *
  36  * MODES OF OPERATION
  37  * ----- -- ---------
  38  *
  39  * As far as NINDY is concerned, GDB is always in one of two modes: command
  40  * mode or passthrough mode.
  41  *
  42  * In command mode (the default) pre-defined packets containing requests
  43  * are sent by GDB to NINDY.  NINDY never talks except in reponse to a request.
  44  *
  45  * Once the the user program is started, GDB enters passthrough mode, to give
  46  * the user program access to the terminal.  GDB remains in this mode until
  47  * NINDY indicates that the program has stopped.
  48  *
  49  *
  50  * PASSTHROUGH MODE
  51  * ----------- ----
  52  *
  53  * GDB writes all input received from the keyboard directly to NINDY, and writes
  54  * all characters received from NINDY directly to the monitor.
  55  *
  56  * Keyboard input is neither buffered nor echoed to the monitor.
  57  *
  58  * GDB remains in passthrough mode until NINDY sends a single ^P character,
  59  * to indicate that the user process has stopped.
  60  *
  61  * Note:
  62  *      GDB assumes NINDY performs a 'flushreg' when the user program stops.
  63  *
  64  *
  65  * COMMAND MODE
  66  * ------- ----
  67  *
  68  * All info (except for message ack and nak) is transferred between gdb
  69  * and the remote processor in messages of the following format:
  70  *
  71  *              <info>#<checksum>
  72  *
  73  * where
  74  *      #       is a literal character
  75  *
  76  *      <info>  ASCII information;  all numeric information is in the
  77  *              form of hex digits ('0'-'9' and lowercase 'a'-'f').
  78  *
  79  *      <checksum>
  80  *              is a pair of ASCII hex digits representing an 8-bit
  81  *              checksum formed by adding together each of the
  82  *              characters in <info>.
  83  *
  84  * The receiver of a message always sends a single character to the sender
  85  * to indicate that the checksum was good ('+') or bad ('-');  the sender
  86  * re-transmits the entire message over until a '+' is received.
  87  *
  88  * In response to a command NINDY always sends back either data or
  89  * a result code of the form "Xnn", where "nn" are hex digits and "X00"
  90  * means no errors.  (Exceptions: the "s" and "c" commands don't respond.)
  91  *
  92  * SEE THE HEADER OF THE FILE "gdb.c" IN THE NINDY MONITOR SOURCE CODE FOR A
  93  * FULL DESCRIPTION OF LEGAL COMMANDS.
  94  *
  95  * SEE THE FILE "stop.h" IN THE NINDY MONITOR SOURCE CODE FOR A LIST
  96  * OF STOP CODES.
  97  *
  98  ***************************************************************************/
  99
 100 #include "defs.h"
 101 #include <signal.h>
 102 #include <sys/types.h>
 103 #include <setjmp.h>
 104
 105 #include "frame.h"
 106 #include "inferior.h"
 107 #include "bfd.h"
 108 #include "symfile.h"
 109 #include "target.h"
 110 #include "gdbcore.h"
 111 #include "command.h"
 112 #include "floatformat.h"
 113 #include "regcache.h"
 114
 115 #include <sys/file.h>
 116 #include <ctype.h>
 117 #include "serial.h"
 118 #include "nindy-share/env.h"
 119 #include "nindy-share/stop.h"
 120 #include "remote-utils.h"
 121
 122 extern int unlink ();
 123 extern char *getenv ();
 124 extern char *mktemp ();
 125
 126 extern void generic_mourn_inferior ();
 127
 128 extern struct target_ops nindy_ops;
 129 extern FILE *instream;
 130
 131 extern char ninStopWhy ();
 132 extern int ninMemGet ();
 133 extern int ninMemPut ();
 134
 135 int nindy_initial_brk;          /* nonzero if want to send an initial BREAK to nindy */
 136 int nindy_old_protocol;         /* nonzero if want to use old protocol */
 137 char *nindy_ttyname;            /* name of tty to talk to nindy on, or null */
 138
 139 #define DLE     '\020'          /* Character NINDY sends to indicate user program has
 140                                    * halted.  */
 141 #define TRUE    1
 142 #define FALSE   0
 143
 144 /* From nindy-share/nindy.c.  */
 145 extern struct serial *nindy_serial;
 146
 147 static int have_regs = 0;       /* 1 iff regs read since i960 last halted */
 148 static int regs_changed = 0;    /* 1 iff regs were modified since last read */
 149
 150 extern char *exists ();
 151
 152 static void nindy_fetch_registers (int);
 153
 154 static void nindy_store_registers (int);
 155 \f
 156 static char *savename;
 157
 158 static void
 159 nindy_close (int quitting)
 160 {
 161   if (nindy_serial != NULL)
 162     serial_close (nindy_serial);
 163   nindy_serial = NULL;
 164
 165   if (savename)
 166     xfree (savename);
 167   savename = 0;
 168 }
 169
 170 /* Open a connection to a remote debugger.
 171    FIXME, there should be "set" commands for the options that are
 172    now specified with gdb command-line options (old_protocol,
 173    and initial_brk).  */
 174 void
 175 nindy_open (char *name,         /* "/dev/ttyXX", "ttyXX", or "XX": tty to be opened */
 176             int from_tty)
 177 {
 178   char baudrate[1024];
 179
 180   if (!name)
 181     error_no_arg ("serial port device name");
 182
 183   target_preopen (from_tty);
 184
 185   nindy_close (0);
 186
 187   have_regs = regs_changed = 0;
 188
 189   /* Allow user to interrupt the following -- we could hang if there's
 190      no NINDY at the other end of the remote tty.  */
 191   immediate_quit++;
 192   /* If baud_rate is -1, then ninConnect will not recognize the baud rate
 193      and will deal with the situation in a (more or less) reasonable
 194      fashion.  */
 195   sprintf (baudrate, "%d", baud_rate);
 196   ninConnect (name, baudrate,
 197               nindy_initial_brk, !from_tty, nindy_old_protocol);
 198   immediate_quit--;
 199
 200   if (nindy_serial == NULL)
 201     {
 202       perror_with_name (name);
 203     }
 204
 205   savename = savestring (name, strlen (name));
 206   push_target (&nindy_ops);
 207
 208   target_fetch_registers (-1);
 209
 210   init_thread_list ();
 211   init_wait_for_inferior ();
 212   clear_proceed_status ();
 213   normal_stop ();
 214 }
 215
 216 /* User-initiated quit of nindy operations.  */
 217
 218 static void
 219 nindy_detach (char *name, int from_tty)
 220 {
 221   if (name)
 222     error ("Too many arguments");
 223   pop_target ();
 224 }
 225
 226 static void
 227 nindy_files_info (void)
 228 {
 229   /* FIXME: this lies about the baud rate if we autobauded.  */
 230   printf_unfiltered ("\tAttached to %s at %d bits per second%s%s.\n", savename,
 231                      baud_rate,
 232                      nindy_old_protocol ? " in old protocol" : "",
 233                      nindy_initial_brk ? " with initial break" : "");
 234 }
 235 \f
 236 /* Return the number of characters in the buffer BUF before
 237    the first DLE character.  N is maximum number of characters to
 238    consider.  */
 239
 240 static
 241 int
 242 non_dle (char *buf, int n)
 243 {
 244   int i;
 245
 246   for (i = 0; i < n; i++)
 247     {
 248       if (buf[i] == DLE)
 249         {
 250           break;
 251         }
 252     }
 253   return i;
 254 }
 255 \f
 256 /* Tell the remote machine to resume.  */
 257
 258 void
 259 nindy_resume (ptid_t ptid, int step, enum target_signal siggnal)
 260 {
 261   if (siggnal != TARGET_SIGNAL_0 && siggnal != stop_signal)
 262     warning ("Can't send signals to remote NINDY targets.");
 263
 264   if (regs_changed)
 265     {
 266       nindy_store_registers (-1);
 267       regs_changed = 0;
 268     }
 269   have_regs = 0;
 270   ninGo (step);
 271 }
 272 \f
 273 /* FIXME, we can probably use the normal terminal_inferior stuff here.
 274    We have to do terminal_inferior and then set up the passthrough
 275    settings initially.  Thereafter, terminal_ours and terminal_inferior
 276    will automatically swap the settings around for us.  */
 277
 278 struct clean_up_tty_args
 279 {
 280   serial_ttystate state;
 281   struct serial *serial;
 282 };
 283 static struct clean_up_tty_args tty_args;
 284
 285 static void
 286 clean_up_tty (PTR ptrarg)
 287 {
 288   struct clean_up_tty_args *args = (struct clean_up_tty_args *) ptrarg;
 289   serial_set_tty_state (args->serial, args->state);
 290   xfree (args->state);
 291   warning ("\n\nYou may need to reset the 80960 and/or reload your program.\n");
 292 }
 293
 294 /* Recover from ^Z or ^C while remote process is running */
 295 static void (*old_ctrlc) ();
 296 #ifdef SIGTSTP
 297 static void (*old_ctrlz) ();
 298 #endif
 299
 300 static void
 301 clean_up_int (void)
 302 {
 303   serial_set_tty_state (tty_args.serial, tty_args.state);
 304   xfree (tty_args.state);
 305
 306   signal (SIGINT, old_ctrlc);
 307 #ifdef SIGTSTP
 308   signal (SIGTSTP, old_ctrlz);
 309 #endif
 310   error ("\n\nYou may need to reset the 80960 and/or reload your program.\n");
 311 }
 312
 313 /* Wait until the remote machine stops. While waiting, operate in passthrough
 314  * mode; i.e., pass everything NINDY sends to gdb_stdout, and everything from
 315  * stdin to NINDY.
 316  *
 317  * Return to caller, storing status in 'status' just as `wait' would.
 318  */
 319
 320 static ptid_t
 321 nindy_wait (ptid_t ptid, struct target_waitstatus *status)
 322 {
 323   fd_set fds;
 324   int c;
 325   char buf[2];
 326   int i, n;
 327   unsigned char stop_exit;
 328   unsigned char stop_code;
 329   struct cleanup *old_cleanups;
 330   long ip_value, fp_value, sp_value;    /* Reg values from stop */
 331
 332   status->kind = TARGET_WAITKIND_EXITED;
 333   status->value.integer = 0;
 334
 335   /* OPERATE IN PASSTHROUGH MODE UNTIL NINDY SENDS A DLE CHARACTER */
 336
 337   /* Save current tty attributes, and restore them when done.  */
 338   tty_args.serial = serial_fdopen (0);
 339   tty_args.state = serial_get_tty_state (tty_args.serial);
 340   old_ctrlc = signal (SIGINT, clean_up_int);
 341 #ifdef SIGTSTP
 342   old_ctrlz = signal (SIGTSTP, clean_up_int);
 343 #endif
 344
 345   old_cleanups = make_cleanup (clean_up_tty, &tty_args);
 346
 347   /* Pass input from keyboard to NINDY as it arrives.  NINDY will interpret
 348      <CR> and perform echo.  */
 349   /* This used to set CBREAK and clear ECHO and CRMOD.  I hope this is close
 350      enough.  */
 351   serial_raw (tty_args.serial);
 352
 353   while (1)
 354     {
 355       /* Input on remote */
 356       c = serial_readchar (nindy_serial, -1);
 357       if (c == SERIAL_ERROR)
 358         {
 359           error ("Cannot read from serial line");
 360         }
 361       else if (c == 0x1b)       /* ESC */
 362         {
 363           c = serial_readchar (nindy_serial, -1);
 364           c &= ~0x40;
 365         }
 366       else if (c != 0x10)       /* DLE */
 367         /* Write out any characters preceding DLE */
 368         {
 369           buf[0] = (char) c;
 370           write (1, buf, 1);
 371         }
 372       else
 373         {
 374           stop_exit = ninStopWhy (&stop_code,
 375                                   &ip_value, &fp_value, &sp_value);
 376           if (!stop_exit && (stop_code == STOP_SRQ))
 377             {
 378               immediate_quit++;
 379               ninSrq ();
 380               immediate_quit--;
 381             }
 382           else
 383             {
 384               /* Get out of loop */
 385               supply_register (IP_REGNUM,
 386                                (char *) &ip_value);
 387               supply_register (FP_REGNUM,
 388                                (char *) &fp_value);
 389               supply_register (SP_REGNUM,
 390                                (char *) &sp_value);
 391               break;
 392             }
 393         }
 394     }
 395
 396   serial_set_tty_state (tty_args.serial, tty_args.state);
 397   xfree (tty_args.state);
 398   discard_cleanups (old_cleanups);
 399
 400   if (stop_exit)
 401     {
 402       status->kind = TARGET_WAITKIND_EXITED;
 403       status->value.integer = stop_code;
 404     }
 405   else
 406     {
 407       /* nindy has some special stop code need to be handled */
 408       if (stop_code == STOP_GDB_BPT)
 409         stop_code = TRACE_STEP;
 410       status->kind = TARGET_WAITKIND_STOPPED;
 411       status->value.sig = i960_fault_to_signal (stop_code);
 412     }
 413   return inferior_ptid;
 414 }
 415
 416 /* Read the remote registers into the block REGS.  */
 417
 418 /* This is the block that ninRegsGet and ninRegsPut handles.  */
 419 struct nindy_regs
 420 {
 421   char local_regs[16 * 4];
 422   char global_regs[16 * 4];
 423   char pcw_acw[2 * 4];
 424   char ip[4];
 425   char tcw[4];
 426   char fp_as_double[4 * 8];
 427 };
 428
 429 static void
 430 nindy_fetch_registers (int regno)
 431 {
 432   struct nindy_regs nindy_regs;
 433   int regnum;
 434
 435   immediate_quit++;
 436   ninRegsGet ((char *) &nindy_regs);
 437   immediate_quit--;
 438
 439   memcpy (&registers[REGISTER_BYTE (R0_REGNUM)], nindy_regs.local_regs, 16 * 4);
 440   memcpy (&registers[REGISTER_BYTE (G0_REGNUM)], nindy_regs.global_regs, 16 * 4);
 441   memcpy (&registers[REGISTER_BYTE (PCW_REGNUM)], nindy_regs.pcw_acw, 2 * 4);
 442   memcpy (&registers[REGISTER_BYTE (IP_REGNUM)], nindy_regs.ip, 1 * 4);
 443   memcpy (&registers[REGISTER_BYTE (TCW_REGNUM)], nindy_regs.tcw, 1 * 4);
 444   memcpy (&registers[REGISTER_BYTE (FP0_REGNUM)], nindy_regs.fp_as_double, 4 * 8);
 445
 446   registers_fetched ();
 447 }
 448
 449 static void
 450 nindy_prepare_to_store (void)
 451 {
 452   /* Fetch all regs if they aren't already here.  */
 453   read_register_bytes (0, NULL, REGISTER_BYTES);
 454 }
 455
 456 static void
 457 nindy_store_registers (int regno)
 458 {
 459   struct nindy_regs nindy_regs;
 460   int regnum;
 461
 462   memcpy (nindy_regs.local_regs, &registers[REGISTER_BYTE (R0_REGNUM)], 16 * 4);
 463   memcpy (nindy_regs.global_regs, &registers[REGISTER_BYTE (G0_REGNUM)], 16 * 4);
 464   memcpy (nindy_regs.pcw_acw, &registers[REGISTER_BYTE (PCW_REGNUM)], 2 * 4);
 465   memcpy (nindy_regs.ip, &registers[REGISTER_BYTE (IP_REGNUM)], 1 * 4);
 466   memcpy (nindy_regs.tcw, &registers[REGISTER_BYTE (TCW_REGNUM)], 1 * 4);
 467   memcpy (nindy_regs.fp_as_double, &registers[REGISTER_BYTE (FP0_REGNUM)], 8 * 4);
 468
 469   immediate_quit++;
 470   ninRegsPut ((char *) &nindy_regs);
 471   immediate_quit--;
 472 }
 473
 474 /* Copy LEN bytes to or from inferior's memory starting at MEMADDR
 475    to debugger memory starting at MYADDR.   Copy to inferior if
 476    SHOULD_WRITE is nonzero.  Returns the length copied.  TARGET is
 477    unused.  */
 478
 479 int
 480 nindy_xfer_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len,
 481                             int should_write, struct mem_attrib *attrib,
 482                             struct target_ops *target)
 483 {
 484   int res;
 485
 486   if (len <= 0)
 487     return 0;
 488
 489   if (should_write)
 490     res = ninMemPut (memaddr, myaddr, len);
 491   else
 492     res = ninMemGet (memaddr, myaddr, len);
 493
 494   return res;
 495 }
 496 \f
 497 static void
 498 nindy_create_inferior (char *execfile, char *args, char **env)
 499 {
 500   int entry_pt;
 501   int pid;
 502
 503   if (args && *args)
 504     error ("Can't pass arguments to remote NINDY process");
 505
 506   if (execfile == 0 || exec_bfd == 0)
 507     error ("No executable file specified");
 508
 509   entry_pt = (int) bfd_get_start_address (exec_bfd);
 510
 511   pid = 42;
 512
 513   /* The "process" (board) is already stopped awaiting our commands, and
 514      the program is already downloaded.  We just set its PC and go.  */
 515
 516   inferior_ptid = pid_to_ptid (pid);    /* Needed for wait_for_inferior below */
 517
 518   clear_proceed_status ();
 519
 520   /* Tell wait_for_inferior that we've started a new process.  */
 521   init_wait_for_inferior ();
 522
 523   /* Set up the "saved terminal modes" of the inferior
 524      based on what modes we are starting it with.  */
 525   target_terminal_init ();
 526
 527   /* Install inferior's terminal modes.  */
 528   target_terminal_inferior ();
 529
 530   /* insert_step_breakpoint ();  FIXME, do we need this?  */
 531   /* Let 'er rip... */
 532   proceed ((CORE_ADDR) entry_pt, TARGET_SIGNAL_DEFAULT, 0);
 533 }
 534
 535 static void
 536 reset_command (char *args, int from_tty)
 537 {
 538   if (nindy_serial == NULL)
 539     {
 540       error ("No target system to reset -- use 'target nindy' command.");
 541     }
 542   if (query ("Really reset the target system?", 0, 0))
 543     {
 544       serial_send_break (nindy_serial);
 545       tty_flush (nindy_serial);
 546     }
 547 }
 548
 549 void
 550 nindy_kill (char *args, int from_tty)
 551 {
 552   return;                       /* Ignore attempts to kill target system */
 553 }
 554
 555 /* Clean up when a program exits.
 556
 557    The program actually lives on in the remote processor's RAM, and may be
 558    run again without a download.  Don't leave it full of breakpoint
 559    instructions.  */
 560
 561 void
 562 nindy_mourn_inferior (void)
 563 {
 564   remove_breakpoints ();
 565   unpush_target (&nindy_ops);
 566   generic_mourn_inferior ();    /* Do all the proper things now */
 567 }
 568 \f
 569 /* Pass the args the way catch_errors wants them.  */
 570 static int
 571 nindy_open_stub (char *arg)
 572 {
 573   nindy_open (arg, 1);
 574   return 1;
 575 }
 576
 577 static void
 578 nindy_load (char *filename, int from_tty)
 579 {
 580   asection *s;
 581   /* Can't do unix style forking on a VMS system, so we'll use bfd to do
 582      all the work for us
 583    */
 584
 585   bfd *file = bfd_openr (filename, 0);
 586   if (!file)
 587     {
 588       perror_with_name (filename);
 589       return;
 590     }
 591
 592   if (!bfd_check_format (file, bfd_object))
 593     {
 594       error ("can't prove it's an object file\n");
 595       return;
 596     }
 597
 598   for (s = file->sections; s; s = s->next)
 599     {
 600       if (s->flags & SEC_LOAD)
 601         {
 602           char *buffer = xmalloc (s->_raw_size);
 603           bfd_get_section_contents (file, s, buffer, 0, s->_raw_size);
 604           printf ("Loading section %s, size %x vma %x\n",
 605                   s->name,
 606                   s->_raw_size,
 607                   s->vma);
 608           ninMemPut (s->vma, buffer, s->_raw_size);
 609           xfree (buffer);
 610         }
 611     }
 612   bfd_close (file);
 613 }
 614
 615 static int
 616 load_stub (char *arg)
 617 {
 618   target_load (arg, 1);
 619   return 1;
 620 }
 621
 622 /* This routine is run as a hook, just before the main command loop is
 623    entered.  If gdb is configured for the i960, but has not had its
 624    nindy target specified yet, this will loop prompting the user to do so.
 625
 626    Unlike the loop provided by Intel, we actually let the user get out
 627    of this with a RETURN.  This is useful when e.g. simply examining
 628    an i960 object file on the host system.  */
 629
 630 void
 631 nindy_before_main_loop (void)
 632 {
 633   char ttyname[100];
 634   char *p, *p2;
 635
 636   while (target_stack->target_ops != &nindy_ops)        /* What is this crap??? */
 637     {                           /* remote tty not specified yet */
 638       if (instream == stdin)
 639         {
 640           printf_unfiltered ("\nAttach /dev/ttyNN -- specify NN, or \"quit\" to quit:  ");
 641           gdb_flush (gdb_stdout);
 642         }
 643       fgets (ttyname, sizeof (ttyname) - 1, stdin);
 644
 645       /* Strip leading and trailing whitespace */
 646       for (p = ttyname; isspace (*p); p++)
 647         {
 648           ;
 649         }
 650       if (*p == '\0')
 651         {
 652           return;               /* User just hit spaces or return, wants out */
 653         }
 654       for (p2 = p; !isspace (*p2) && (*p2 != '\0'); p2++)
 655         {
 656           ;
 657         }
 658       *p2 = '\0';
 659       if (STREQ ("quit", p))
 660         {
 661           exit (1);
 662         }
 663
 664       if (catch_errors (nindy_open_stub, p, "", RETURN_MASK_ALL))
 665         {
 666           /* Now that we have a tty open for talking to the remote machine,
 667              download the executable file if one was specified.  */
 668           if (exec_bfd)
 669             {
 670               catch_errors (load_stub, bfd_get_filename (exec_bfd), "",
 671                             RETURN_MASK_ALL);
 672             }
 673         }
 674     }
 675 }
 676 \f
 677 /* Define the target subroutine names */
 678
 679 struct target_ops nindy_ops;
 680
 681 static void
 682 init_nindy_ops (void)
 683 {
 684   nindy_ops.to_shortname = "nindy";
 685   "Remote serial target in i960 NINDY-specific protocol",
 686     nindy_ops.to_longname = "Use a remote i960 system running NINDY connected by a serial line.\n\
 687 Specify the name of the device the serial line is connected to.\n\
 688 The speed (baud rate), whether to use the old NINDY protocol,\n\
 689 and whether to send a break on startup, are controlled by options\n\
 690 specified when you started GDB.";
 691   nindy_ops.to_doc = "";
 692   nindy_ops.to_open = nindy_open;
 693   nindy_ops.to_close = nindy_close;
 694   nindy_ops.to_attach = 0;
 695   nindy_ops.to_post_attach = NULL;
 696   nindy_ops.to_require_attach = NULL;
 697   nindy_ops.to_detach = nindy_detach;
 698   nindy_ops.to_require_detach = NULL;
 699   nindy_ops.to_resume = nindy_resume;
 700   nindy_ops.to_wait = nindy_wait;
 701   nindy_ops.to_post_wait = NULL;
 702   nindy_ops.to_fetch_registers = nindy_fetch_registers;
 703   nindy_ops.to_store_registers = nindy_store_registers;
 704   nindy_ops.to_prepare_to_store = nindy_prepare_to_store;
 705   nindy_ops.to_xfer_memory = nindy_xfer_inferior_memory;
 706   nindy_ops.to_files_info = nindy_files_info;
 707   nindy_ops.to_insert_breakpoint = memory_insert_breakpoint;
 708   nindy_ops.to_remove_breakpoint = memory_remove_breakpoint;
 709   nindy_ops.to_terminal_init = 0;
 710   nindy_ops.to_terminal_inferior = 0;
 711   nindy_ops.to_terminal_ours_for_output = 0;
 712   nindy_ops.to_terminal_ours = 0;
 713   nindy_ops.to_terminal_info = 0;       /* Terminal crud */
 714   nindy_ops.to_kill = nindy_kill;
 715   nindy_ops.to_load = nindy_load;
 716   nindy_ops.to_lookup_symbol = 0;       /* lookup_symbol */
 717   nindy_ops.to_create_inferior = nindy_create_inferior;
 718   nindy_ops.to_post_startup_inferior = NULL;
 719   nindy_ops.to_acknowledge_created_inferior = NULL;
 720   nindy_ops.to_clone_and_follow_inferior = NULL;
 721   nindy_ops.to_post_follow_inferior_by_clone = NULL;
 722   nindy_ops.to_insert_fork_catchpoint = NULL;
 723   nindy_ops.to_remove_fork_catchpoint = NULL;
 724   nindy_ops.to_insert_vfork_catchpoint = NULL;
 725   nindy_ops.to_remove_vfork_catchpoint = NULL;
 726   nindy_ops.to_has_forked = NULL;
 727   nindy_ops.to_has_vforked = NULL;
 728   nindy_ops.to_can_follow_vfork_prior_to_exec = NULL;
 729   nindy_ops.to_post_follow_vfork = NULL;
 730   nindy_ops.to_insert_exec_catchpoint = NULL;
 731   nindy_ops.to_remove_exec_catchpoint = NULL;
 732   nindy_ops.to_has_execd = NULL;
 733   nindy_ops.to_reported_exec_events_per_exec_call = NULL;
 734   nindy_ops.to_has_exited = NULL;
 735   nindy_ops.to_mourn_inferior = nindy_mourn_inferior;
 736   nindy_ops.to_can_run = 0;     /* can_run */
 737   nindy_ops.to_notice_signals = 0;      /* notice_signals */
 738   nindy_ops.to_thread_alive = 0;        /* to_thread_alive */
 739   nindy_ops.to_stop = 0;        /* to_stop */
 740   nindy_ops.to_pid_to_exec_file = NULL;
 741   nindy_ops.to_stratum = process_stratum;
 742   nindy_ops.DONT_USE = 0;       /* next */
 743   nindy_ops.to_has_all_memory = 1;
 744   nindy_ops.to_has_memory = 1;
 745   nindy_ops.to_has_stack = 1;
 746   nindy_ops.to_has_registers = 1;
 747   nindy_ops.to_has_execution = 1;       /* all mem, mem, stack, regs, exec */
 748   nindy_ops.to_sections = 0;
 749   nindy_ops.to_sections_end = 0;        /* Section pointers */
 750   nindy_ops.to_magic = OPS_MAGIC;       /* Always the last thing */
 751 }
 752
 753 void
 754 _initialize_nindy (void)
 755 {
 756   init_nindy_ops ();
 757   add_target (&nindy_ops);
 758   add_com ("reset", class_obscure, reset_command,
 759            "Send a 'break' to the remote target system.\n\
 760 Only useful if the target has been equipped with a circuit\n\
 761 to perform a hard reset when a break is detected.");
 762 }