gdb/sparcl-tdep.c

   1 /* Target dependent code for the Fujitsu SPARClite for GDB, the GNU debugger.
   2    Copyright 1994, 1995, 1996, 1999  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 Public 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 "gdbcore.h"
  22 #include "breakpoint.h"
  23 #include "target.h"
  24 #include "serial.h"
  25 #include <sys/types.h>
  26
  27 #ifdef HAVE_SYS_SELECT_H
  28 #include <sys/select.h>
  29 #endif
  30
  31 #if (!defined(__GO32__) && !defined(_WIN32)) || defined(__CYGWIN32__)
  32 #define HAVE_SOCKETS
  33 #include <sys/time.h>
  34 #include <unistd.h>
  35 #include <sys/socket.h>
  36 #include <netinet/in.h>
  37 #include <netdb.h>
  38 #endif
  39
  40 extern struct target_ops sparclite_ops; /* Forward decl */
  41 extern struct target_ops remote_ops;
  42
  43 static char *remote_target_name = NULL;
  44 static serial_t remote_desc = NULL;
  45 static int serial_flag;
  46 #ifdef HAVE_SOCKETS
  47 static int udp_fd = -1;
  48 #endif
  49
  50 static serial_t open_tty PARAMS ((char *name));
  51 static int send_resp PARAMS ((serial_t desc, char c));
  52 static void close_tty PARAMS ((int ignore));
  53 #ifdef HAVE_SOCKETS
  54 static int recv_udp_buf PARAMS ((int fd, unsigned char *buf, int len, int timeout));
  55 static int send_udp_buf PARAMS ((int fd, unsigned char *buf, int len));
  56 #endif
  57 static void sparclite_open PARAMS ((char *name, int from_tty));
  58 static void sparclite_close PARAMS ((int quitting));
  59 static void download PARAMS ((char *target_name, char *args, int from_tty,
  60                               void (*write_routine) (bfd *from_bfd,
  61                                                      asection *from_sec,
  62                                                      file_ptr from_addr,
  63                                                      bfd_vma to_addr, int len),
  64                               void (*start_routine) (bfd_vma entry)));
  65 static void sparclite_serial_start PARAMS ((bfd_vma entry));
  66 static void sparclite_serial_write PARAMS ((bfd *from_bfd, asection *from_sec,
  67                                             file_ptr from_addr,
  68                                             bfd_vma to_addr, int len));
  69 #ifdef HAVE_SOCKETS
  70 static unsigned short calc_checksum PARAMS ((unsigned char *buffer,
  71                                              int count));
  72 static void sparclite_udp_start PARAMS ((bfd_vma entry));
  73 static void sparclite_udp_write PARAMS ((bfd *from_bfd, asection *from_sec,
  74                                          file_ptr from_addr, bfd_vma to_addr,
  75                                          int len));
  76 #endif
  77 static void sparclite_download PARAMS ((char *filename, int from_tty));
  78
  79 #define DDA2_SUP_ASI            0xb000000
  80 #define DDA1_SUP_ASI            0xb0000
  81
  82 #define DDA2_ASI_MASK           0xff000000
  83 #define DDA1_ASI_MASK           0xff0000
  84 #define DIA2_SUP_MODE           0x8000
  85 #define DIA1_SUP_MODE           0x4000
  86 #define DDA2_ENABLE             0x100
  87 #define DDA1_ENABLE             0x80
  88 #define DIA2_ENABLE             0x40
  89 #define DIA1_ENABLE             0x20
  90 #define DSINGLE_STEP            0x10            /* not used */
  91 #define DDV_TYPE_MASK           0xc
  92 #define DDV_TYPE_LOAD           0x0
  93 #define DDV_TYPE_STORE          0x4
  94 #define DDV_TYPE_ACCESS         0x8
  95 #define DDV_TYPE_ALWAYS         0xc
  96 #define DDV_COND                0x2
  97 #define DDV_MASK                0x1
  98
  99 int
 100 sparclite_insert_watchpoint (addr, len, type)
 101      CORE_ADDR addr;
 102      int len;
 103      int type;
 104 {
 105   CORE_ADDR dcr;
 106
 107   dcr = read_register (DCR_REGNUM);
 108
 109   if (!(dcr & DDA1_ENABLE))
 110     {
 111       write_register (DDA1_REGNUM, addr);
 112       dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK);
 113       dcr |= (DDA1_SUP_ASI | DDA1_ENABLE);
 114       if (type == 1)
 115         {
 116           write_register (DDV1_REGNUM, 0);
 117           write_register (DDV2_REGNUM, 0xffffffff);
 118           dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK));
 119         }
 120       else if (type == 0)
 121         {
 122           write_register (DDV1_REGNUM, 0);
 123           write_register (DDV2_REGNUM, 0xffffffff);
 124           dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK));
 125         }
 126       else
 127         {
 128           write_register (DDV1_REGNUM, 0);
 129           write_register (DDV2_REGNUM, 0xffffffff);
 130           dcr |= (DDV_TYPE_ACCESS);
 131         }
 132       write_register (DCR_REGNUM, dcr);
 133     }
 134   else if (!(dcr & DDA2_ENABLE))
 135     {
 136       write_register (DDA2_REGNUM, addr);
 137       dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK);
 138       dcr |= (DDA2_SUP_ASI | DDA2_ENABLE);
 139       if (type == 1)
 140         {
 141           write_register (DDV1_REGNUM, 0);
 142           write_register (DDV2_REGNUM, 0xffffffff);
 143           dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK);
 144         }
 145       else if (type == 0)
 146         {
 147           write_register (DDV1_REGNUM, 0);
 148           write_register (DDV2_REGNUM, 0xffffffff);
 149           dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK);
 150         }
 151       else
 152         {
 153           write_register (DDV1_REGNUM, 0);
 154           write_register (DDV2_REGNUM, 0xffffffff);
 155           dcr |= (DDV_TYPE_ACCESS);
 156         }
 157       write_register (DCR_REGNUM, dcr);
 158     }
 159   else
 160     return -1;
 161
 162   return 0;
 163 }
 164
 165 int
 166 sparclite_remove_watchpoint (addr, len, type)
 167      CORE_ADDR addr;
 168      int len;
 169      int type;
 170 {
 171   CORE_ADDR dcr, dda1, dda2;
 172
 173   dcr = read_register (DCR_REGNUM);
 174   dda1 = read_register (DDA1_REGNUM);
 175   dda2 = read_register (DDA2_REGNUM);
 176
 177   if ((dcr & DDA1_ENABLE) && addr == dda1)
 178     write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE));
 179   else if ((dcr & DDA2_ENABLE) && addr == dda2)
 180     write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE));
 181   else
 182     return -1;
 183
 184   return 0;
 185 }
 186
 187 int
 188 sparclite_insert_hw_breakpoint (addr, len)
 189      CORE_ADDR addr;
 190      int len;
 191 {
 192   CORE_ADDR dcr;
 193
 194   dcr = read_register (DCR_REGNUM);
 195
 196   if (!(dcr & DIA1_ENABLE))
 197     {
 198       write_register (DIA1_REGNUM, addr);
 199       write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE));
 200     }
 201   else if (!(dcr & DIA2_ENABLE))
 202     {
 203       write_register (DIA2_REGNUM, addr);
 204       write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE));
 205     }
 206   else
 207     return -1;
 208
 209   return 0;
 210 }
 211
 212 int
 213 sparclite_remove_hw_breakpoint (addr, shadow)
 214      CORE_ADDR addr;
 215      int shadow;
 216 {
 217   CORE_ADDR dcr, dia1, dia2;
 218
 219   dcr = read_register (DCR_REGNUM);
 220   dia1 = read_register (DIA1_REGNUM);
 221   dia2 = read_register (DIA2_REGNUM);
 222
 223   if ((dcr & DIA1_ENABLE) && addr == dia1)
 224     write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE));
 225   else if ((dcr & DIA2_ENABLE) && addr == dia2)
 226     write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE));
 227   else
 228     return -1;
 229
 230   return 0;
 231 }
 232
 233 int
 234 sparclite_check_watch_resources (type, cnt, ot)
 235      int type;
 236      int cnt;
 237      int ot;
 238 {
 239   /* Watchpoints not supported on simulator.  */
 240   if (strcmp (target_shortname, "sim") == 0)
 241     return 0;
 242
 243   if (type == bp_hardware_breakpoint)
 244     {
 245       if (TARGET_HW_BREAK_LIMIT == 0)
 246         return 0;
 247       else if (cnt <= TARGET_HW_BREAK_LIMIT)
 248         return 1;
 249     }
 250   else
 251     {
 252       if (TARGET_HW_WATCH_LIMIT == 0)
 253         return 0;
 254       else if (ot)
 255         return -1;
 256       else if (cnt <= TARGET_HW_WATCH_LIMIT)
 257         return 1;
 258     }
 259   return -1;
 260 }
 261
 262 CORE_ADDR
 263 sparclite_stopped_data_address ()
 264 {
 265   CORE_ADDR dsr, dda1, dda2;
 266
 267   dsr = read_register (DSR_REGNUM);
 268   dda1 = read_register (DDA1_REGNUM);
 269   dda2 = read_register (DDA2_REGNUM);
 270
 271   if (dsr & 0x10)
 272     return dda1;
 273   else if (dsr & 0x20)
 274     return dda2;
 275   else
 276     return 0;
 277 }
 278 \f
 279 static serial_t
 280 open_tty (name)
 281      char *name;
 282 {
 283   serial_t desc;
 284
 285   desc = SERIAL_OPEN (name);
 286   if (!desc)
 287     perror_with_name (name);
 288
 289   if (baud_rate != -1)
 290     {
 291       if (SERIAL_SETBAUDRATE (desc, baud_rate))
 292         {
 293           SERIAL_CLOSE (desc);
 294           perror_with_name (name);
 295         }
 296     }
 297
 298   SERIAL_RAW (desc);
 299
 300   SERIAL_FLUSH_INPUT (desc);
 301
 302   return desc;
 303 }
 304
 305 /* Read a single character from the remote end, masking it down to 7 bits. */
 306
 307 static int
 308 readchar (desc, timeout)
 309      serial_t desc;
 310      int timeout;
 311 {
 312   int ch;
 313   char s[10];
 314
 315   ch = SERIAL_READCHAR (desc, timeout);
 316
 317   switch (ch)
 318     {
 319     case SERIAL_EOF:
 320       error ("SPARClite remote connection closed");
 321     case SERIAL_ERROR:
 322       perror_with_name ("SPARClite communication error");
 323     case SERIAL_TIMEOUT:
 324       error ("SPARClite remote timeout");
 325     default:
 326       if (remote_debug > 0)
 327         {
 328           sprintf (s, "[%02x]", ch & 0xff);
 329           puts_debug ("read -->", s, "<--");
 330         }
 331       return ch;
 332     }
 333 }
 334
 335 static void
 336 debug_serial_write (desc, buf, len)
 337      serial_t desc;
 338      char *buf;
 339      int len;
 340 {
 341   char s[10];
 342
 343   SERIAL_WRITE (desc, buf, len);
 344   if (remote_debug > 0)
 345     {
 346       while (len-- > 0)
 347         {
 348           sprintf (s, "[%02x]", *buf & 0xff);
 349           puts_debug ("Sent -->", s, "<--");
 350           buf++;
 351         }
 352     }
 353 }
 354
 355
 356 static int
 357 send_resp (desc, c)
 358      serial_t desc;
 359      char c;
 360 {
 361   debug_serial_write (desc, &c, 1);
 362   return readchar (desc, remote_timeout);
 363 }
 364
 365 static void
 366 close_tty (ignore)
 367      int ignore;
 368 {
 369   if (!remote_desc)
 370     return;
 371
 372   SERIAL_CLOSE (remote_desc);
 373
 374   remote_desc = NULL;
 375 }
 376
 377 #ifdef HAVE_SOCKETS
 378 static int
 379 recv_udp_buf (fd, buf, len, timeout)
 380      int fd, len;
 381      unsigned char *buf;
 382      int timeout;
 383 {
 384   int cc;
 385   fd_set readfds;
 386
 387   FD_ZERO (&readfds);
 388   FD_SET (fd, &readfds);
 389
 390   if (timeout >= 0)
 391     {
 392       struct timeval timebuf;
 393
 394       timebuf.tv_sec = timeout;
 395       timebuf.tv_usec = 0;
 396       cc = select (fd + 1, &readfds, 0, 0, &timebuf);
 397     }
 398   else
 399     cc = select (fd + 1, &readfds, 0, 0, 0);
 400
 401   if (cc == 0)
 402     return 0;
 403
 404   if (cc != 1)
 405     perror_with_name ("recv_udp_buf: Bad return value from select:");
 406
 407   cc = recv (fd, buf, len, 0);
 408
 409   if (cc < 0)
 410     perror_with_name ("Got an error from recv: ");
 411 }
 412
 413 static int
 414 send_udp_buf (fd, buf, len)
 415      int fd, len;
 416      unsigned char *buf;
 417 {
 418   int cc;
 419
 420   cc = send (fd, buf, len, 0);
 421
 422   if (cc == len)
 423     return;
 424
 425   if (cc < 0)
 426     perror_with_name ("Got an error from send: ");
 427
 428   error ("Short count in send: tried %d, sent %d\n", len, cc);
 429 }
 430 #endif /* HAVE_SOCKETS */
 431
 432 static void
 433 sparclite_open (name, from_tty)
 434      char *name;
 435      int from_tty;
 436 {
 437   struct cleanup *old_chain;
 438   int c;
 439   char *p;
 440
 441   if (!name)
 442     error ("You need to specify what device or hostname is associated with the SparcLite board.");
 443
 444   target_preopen (from_tty);
 445
 446   unpush_target (&sparclite_ops);
 447
 448   if (remote_target_name)
 449     free (remote_target_name);
 450
 451   remote_target_name = strsave (name);
 452
 453   /* We need a 'serial' or 'udp' keyword to disambiguate host:port, which can
 454      mean either a serial port on a terminal server, or the IP address of a
 455      SPARClite demo board.  If there's no colon, then it pretty much has to be
 456      a local device (except for DOS... grrmble) */
 457
 458   p = strchr (name, ' ');
 459
 460   if (p)
 461     {
 462       *p++ = '\000';
 463       while ((*p != '\000') && isspace (*p)) p++;
 464
 465       if (strncmp (name, "serial", strlen (name)) == 0)
 466         serial_flag = 1;
 467       else if (strncmp (name, "udp", strlen (name)) == 0)
 468         serial_flag = 0;
 469       else
 470         error ("Must specify either `serial' or `udp'.");
 471     }
 472   else
 473     {
 474       p = name;
 475
 476       if (!strchr (name, ':'))
 477         serial_flag = 1;        /* No colon is unambiguous (local device) */
 478       else
 479         error ("Usage: target sparclite serial /dev/ttyb\n\
 480 or: target sparclite udp host");
 481     }
 482
 483   if (serial_flag)
 484     {
 485       remote_desc = open_tty (p);
 486
 487       old_chain = make_cleanup ((make_cleanup_func) close_tty, 0);
 488
 489       c = send_resp (remote_desc, 0x00);
 490
 491       if (c != 0xaa)
 492         error ("Unknown response (0x%x) from SparcLite.  Try resetting the board.",
 493                c);
 494
 495       c = send_resp (remote_desc, 0x55);
 496
 497       if (c != 0x55)
 498         error ("Sparclite appears to be ill.");
 499     }
 500   else
 501     {
 502 #ifdef HAVE_SOCKETS
 503       struct hostent *he;
 504       struct sockaddr_in sockaddr;
 505       unsigned char buffer[100];
 506       int cc;
 507
 508       /* Setup the socket.  Must be raw UDP. */
 509
 510       he = gethostbyname (p);
 511
 512       if (!he)
 513         error ("No such host %s.", p);
 514
 515       udp_fd = socket (PF_INET, SOCK_DGRAM, 0);
 516
 517       old_chain = make_cleanup (close, udp_fd);
 518
 519       sockaddr.sin_family = PF_INET;
 520       sockaddr.sin_port = htons(7000);
 521       memcpy (&sockaddr.sin_addr.s_addr, he->h_addr, sizeof (struct in_addr));
 522
 523       if (connect (udp_fd, &sockaddr, sizeof(sockaddr)))
 524         perror_with_name ("Connect failed");
 525
 526       buffer[0] = 0x5;
 527       buffer[1] = 0;
 528
 529       send_udp_buf (udp_fd, buffer, 2); /* Request version */
 530       cc = recv_udp_buf (udp_fd, buffer, sizeof(buffer), 5); /* Get response */
 531       if (cc == 0)
 532         error ("SPARClite isn't responding.");
 533
 534       if (cc < 3)
 535         error ("SPARClite appears to be ill.");
 536 #else
 537       error ("UDP downloading is not supported for DOS hosts.");
 538 #endif /* HAVE_SOCKETS */
 539     }
 540
 541   printf_unfiltered ("[SPARClite appears to be alive]\n");
 542
 543   push_target (&sparclite_ops);
 544
 545   discard_cleanups (old_chain);
 546
 547   return;
 548 }
 549
 550 static void
 551 sparclite_close (quitting)
 552      int quitting;
 553 {
 554   if (serial_flag)
 555     close_tty (0);
 556 #ifdef HAVE_SOCKETS
 557   else
 558     if (udp_fd != -1)
 559       close (udp_fd);
 560 #endif
 561 }
 562
 563 #define LOAD_ADDRESS 0x40000000
 564
 565 static void
 566 download (target_name, args, from_tty, write_routine, start_routine)
 567      char *target_name;
 568      char *args;
 569      int from_tty;
 570      void (*write_routine) PARAMS ((bfd *from_bfd, asection *from_sec,
 571                                     file_ptr from_addr, bfd_vma to_addr, int len));
 572      void (*start_routine) PARAMS ((bfd_vma entry));
 573 {
 574   struct cleanup *old_chain;
 575   asection *section;
 576   bfd *pbfd;
 577   bfd_vma entry;
 578   int i;
 579 #define WRITESIZE 1024
 580   char *filename;
 581   int quiet;
 582   int nostart;
 583
 584   quiet = 0;
 585   nostart = 0;
 586   filename = NULL;
 587
 588   while (*args != '\000')
 589     {
 590       char *arg;
 591
 592       while (isspace (*args)) args++;
 593
 594       arg = args;
 595
 596       while ((*args != '\000') && !isspace (*args)) args++;
 597
 598       if (*args != '\000')
 599         *args++ = '\000';
 600
 601       if (*arg != '-')
 602         filename = arg;
 603       else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
 604         quiet = 1;
 605       else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
 606         nostart = 1;
 607       else
 608         error ("unknown option `%s'", arg);
 609     }
 610
 611   if (!filename)
 612     filename = get_exec_file (1);
 613
 614   pbfd = bfd_openr (filename, gnutarget);
 615   if (pbfd == NULL)
 616     {
 617       perror_with_name (filename);
 618       return;
 619     }
 620   old_chain = make_cleanup ((make_cleanup_func) bfd_close, pbfd);
 621
 622   if (!bfd_check_format (pbfd, bfd_object))
 623     error ("\"%s\" is not an object file: %s", filename,
 624            bfd_errmsg (bfd_get_error ()));
 625
 626   for (section = pbfd->sections; section; section = section->next)
 627     {
 628       if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
 629         {
 630           bfd_vma       section_address;
 631           bfd_size_type section_size;
 632           file_ptr      fptr;
 633           const char   *section_name;
 634
 635           section_name = bfd_get_section_name(pbfd, section);
 636
 637           section_address = bfd_get_section_vma (pbfd, section);
 638
 639           /* Adjust sections from a.out files, since they don't
 640              carry their addresses with.  */
 641           if (bfd_get_flavour (pbfd) == bfd_target_aout_flavour)
 642             {
 643               if (strcmp (section_name, ".text") == 0)
 644                 section_address = bfd_get_start_address (pbfd);
 645               else if (strcmp (section_name, ".data") == 0)
 646                 {
 647                   /* Read the first 8 bytes of the data section.
 648                      There should be the string 'DaTa' followed by
 649                      a word containing the actual section address. */
 650                   struct data_marker
 651                   {
 652                     char signature[4];  /* 'DaTa' */
 653                     unsigned char sdata[4];     /* &sdata */
 654                   } marker;
 655                   bfd_get_section_contents (pbfd, section, &marker, 0,
 656                                             sizeof (marker));
 657                   if (strncmp (marker.signature, "DaTa", 4) == 0)
 658                     {
 659                       if (TARGET_BYTE_ORDER == BIG_ENDIAN)
 660                         section_address = bfd_getb32 (marker.sdata);
 661                       else
 662                         section_address = bfd_getl32 (marker.sdata);
 663                     }
 664                 }
 665             }
 666
 667           section_size = bfd_get_section_size_before_reloc (section);
 668
 669           if (!quiet)
 670             printf_filtered ("[Loading section %s at 0x%x (%d bytes)]\n",
 671                              bfd_get_section_name (pbfd, section),
 672                              section_address,
 673                              section_size);
 674
 675           fptr = 0;
 676           while (section_size > 0)
 677             {
 678               int count;
 679               static char inds[] = "|/-\\";
 680               static int k = 0;
 681
 682               QUIT;
 683
 684               count = min (section_size, WRITESIZE);
 685
 686               write_routine (pbfd, section, fptr, section_address, count);
 687
 688               if (!quiet)
 689                 {
 690                   printf_unfiltered ("\r%c", inds[k++ % 4]);
 691                   gdb_flush (gdb_stdout);
 692                 }
 693
 694               section_address += count;
 695               fptr += count;
 696               section_size -= count;
 697             }
 698         }
 699     }
 700
 701   if (!nostart)
 702     {
 703       entry = bfd_get_start_address (pbfd);
 704
 705       if (!quiet)
 706         printf_unfiltered ("[Starting %s at 0x%x]\n", filename, entry);
 707
 708       start_routine (entry);
 709     }
 710
 711   do_cleanups (old_chain);
 712 }
 713
 714 static void
 715 sparclite_serial_start (entry)
 716      bfd_vma entry;
 717 {
 718   char buffer[5];
 719   int i;
 720
 721   buffer[0] = 0x03;
 722   store_unsigned_integer (buffer + 1, 4, entry);
 723
 724   debug_serial_write (remote_desc, buffer, 1 + 4);
 725   i = readchar (remote_desc, remote_timeout);
 726   if (i != 0x55)
 727     error ("Can't start SparcLite.  Error code %d\n", i);
 728 }
 729
 730 static void
 731 sparclite_serial_write (from_bfd, from_sec, from_addr, to_addr, len)
 732      bfd *from_bfd;
 733      asection *from_sec;
 734      file_ptr from_addr;
 735      bfd_vma to_addr;
 736      int len;
 737 {
 738   char buffer[4 + 4 + WRITESIZE]; /* addr + len + data */
 739   unsigned char checksum;
 740   int i;
 741
 742   store_unsigned_integer (buffer, 4, to_addr); /* Address */
 743   store_unsigned_integer (buffer + 4, 4, len); /* Length */
 744
 745   bfd_get_section_contents (from_bfd, from_sec, buffer + 8, from_addr, len);
 746
 747   checksum = 0;
 748   for (i = 0; i < len; i++)
 749     checksum += buffer[8 + i];
 750
 751   i = send_resp (remote_desc, 0x01);
 752
 753   if (i != 0x5a)
 754     error ("Bad response from load command (0x%x)", i);
 755
 756   debug_serial_write (remote_desc, buffer, 4 + 4 + len);
 757   i = readchar (remote_desc, remote_timeout);
 758
 759   if (i != checksum)
 760     error ("Bad checksum from load command (0x%x)", i);
 761 }
 762
 763 #ifdef HAVE_SOCKETS
 764
 765 static unsigned short
 766 calc_checksum (buffer, count)
 767      unsigned char *buffer;
 768      int count;
 769 {
 770   unsigned short checksum;
 771
 772   checksum = 0;
 773   for (; count > 0; count -= 2, buffer += 2)
 774     checksum += (*buffer << 8) | *(buffer + 1);
 775
 776   if (count != 0)
 777     checksum += *buffer << 8;
 778
 779   return checksum;
 780 }
 781
 782 static void
 783 sparclite_udp_start (entry)
 784      bfd_vma entry;
 785 {
 786   unsigned char buffer[6];
 787   int i;
 788
 789   buffer[0] = 0x3;
 790   buffer[1] = 0;
 791   buffer[2] = entry >> 24;
 792   buffer[3] = entry >> 16;
 793   buffer[4] = entry >> 8;
 794   buffer[5] = entry;
 795
 796   send_udp_buf (udp_fd, buffer, 6); /* Send start addr */
 797   i = recv_udp_buf (udp_fd, buffer, sizeof(buffer), -1); /* Get response */
 798
 799   if (i < 1 || buffer[0] != 0x55)
 800     error ("Failed to take start address.");
 801 }
 802
 803 static void
 804 sparclite_udp_write (from_bfd, from_sec, from_addr, to_addr, len)
 805      bfd *from_bfd;
 806      asection *from_sec;
 807      file_ptr from_addr;
 808      bfd_vma to_addr;
 809      int len;
 810 {
 811   unsigned char buffer[2000];
 812   unsigned short checksum;
 813   static int pkt_num = 0;
 814   static unsigned long old_addr = -1;
 815   int i;
 816
 817   while (1)
 818     {
 819       if (to_addr != old_addr)
 820         {
 821           buffer[0] = 0x1;      /* Load command */
 822           buffer[1] = 0x1;      /* Loading address */
 823           buffer[2] = to_addr >> 24;
 824           buffer[3] = to_addr >> 16;
 825           buffer[4] = to_addr >> 8;
 826           buffer[5] = to_addr;
 827
 828           checksum = 0;
 829           for (i = 0; i < 6; i++)
 830             checksum += buffer[i];
 831           checksum &= 0xff;
 832
 833           send_udp_buf (udp_fd, buffer, 6);
 834           i = recv_udp_buf (udp_fd, buffer, sizeof buffer, -1);
 835
 836           if (i < 1)
 837             error ("Got back short checksum for load addr.");
 838
 839           if (checksum != buffer[0])
 840             error ("Got back bad checksum for load addr.");
 841
 842           pkt_num = 0;          /* Load addr resets packet seq # */
 843           old_addr = to_addr;
 844         }
 845
 846       bfd_get_section_contents (from_bfd, from_sec, buffer + 6, from_addr,
 847                                 len);
 848
 849       checksum = calc_checksum (buffer + 6, len);
 850
 851       buffer[0] = 0x1;          /* Load command */
 852       buffer[1] = 0x2;          /* Loading data */
 853       buffer[2] = pkt_num >> 8;
 854       buffer[3] = pkt_num;
 855       buffer[4] = checksum >> 8;
 856       buffer[5] = checksum;
 857
 858       send_udp_buf (udp_fd, buffer, len + 6);
 859       i = recv_udp_buf (udp_fd, buffer, sizeof buffer, 3);
 860
 861       if (i == 0)
 862         {
 863           fprintf_unfiltered (gdb_stderr, "send_data: timeout sending %d bytes to address 0x%x retrying\n", len, to_addr);
 864           continue;
 865         }
 866
 867       if (buffer[0] != 0xff)
 868         error ("Got back bad response for load data.");
 869
 870       old_addr += len;
 871       pkt_num++;
 872
 873       return;
 874     }
 875 }
 876
 877 #endif /* HAVE_SOCKETS */
 878
 879 static void
 880 sparclite_download (filename, from_tty)
 881      char *filename;
 882      int from_tty;
 883 {
 884   if (!serial_flag)
 885 #ifdef HAVE_SOCKETS
 886     download (remote_target_name, filename, from_tty, sparclite_udp_write,
 887               sparclite_udp_start);
 888 #else
 889     abort ();                   /* sparclite_open should prevent this! */
 890 #endif
 891   else
 892     download (remote_target_name, filename, from_tty, sparclite_serial_write,
 893               sparclite_serial_start);
 894 }
 895 \f
 896 /* Define the target subroutine names */
 897
 898 static struct target_ops sparclite_ops ;
 899
 900 static void
 901 init_sparclite_ops(void)
 902 {
 903   sparclite_ops.to_shortname =   "sparclite";
 904   sparclite_ops.to_longname =   "SPARClite remote target";
 905   sparclite_ops.to_doc =   "Use a remote SPARClite target board via a serial line; using a gdb-specific protocol.\n\
 906 Specify the serial device it is connected to (e.g. /dev/ttya).";
 907   sparclite_ops.to_open =   sparclite_open;
 908   sparclite_ops.to_close =   sparclite_close;
 909   sparclite_ops.to_attach =   0;
 910   sparclite_ops.to_post_attach = NULL;
 911   sparclite_ops.to_require_attach = NULL;
 912   sparclite_ops.to_detach =   0;
 913   sparclite_ops.to_require_detach = NULL;
 914   sparclite_ops.to_resume =   0;
 915   sparclite_ops.to_wait  =   0;
 916   sparclite_ops.to_post_wait = NULL;
 917   sparclite_ops.to_fetch_registers  =   0;
 918   sparclite_ops.to_store_registers  =   0;
 919   sparclite_ops.to_prepare_to_store =   0;
 920   sparclite_ops.to_xfer_memory  =   0;
 921   sparclite_ops.to_files_info  =   0;
 922   sparclite_ops.to_insert_breakpoint =   0;
 923   sparclite_ops.to_remove_breakpoint =   0;
 924   sparclite_ops.to_terminal_init  =   0;
 925   sparclite_ops.to_terminal_inferior =   0;
 926   sparclite_ops.to_terminal_ours_for_output =   0;
 927   sparclite_ops.to_terminal_ours  =   0;
 928   sparclite_ops.to_terminal_info  =   0;
 929   sparclite_ops.to_kill  =   0;
 930   sparclite_ops.to_load  =   sparclite_download;
 931   sparclite_ops.to_lookup_symbol =   0;
 932   sparclite_ops.to_create_inferior =   0;
 933   sparclite_ops.to_post_startup_inferior = NULL;
 934   sparclite_ops.to_acknowledge_created_inferior = NULL;
 935   sparclite_ops.to_clone_and_follow_inferior = NULL;
 936   sparclite_ops.to_post_follow_inferior_by_clone = NULL;
 937   sparclite_ops.to_insert_fork_catchpoint = NULL;
 938   sparclite_ops.to_remove_fork_catchpoint = NULL;
 939   sparclite_ops.to_insert_vfork_catchpoint = NULL;
 940   sparclite_ops.to_remove_vfork_catchpoint = NULL;
 941   sparclite_ops.to_has_forked = NULL;
 942   sparclite_ops.to_has_vforked = NULL;
 943   sparclite_ops.to_can_follow_vfork_prior_to_exec = NULL;
 944   sparclite_ops.to_post_follow_vfork = NULL;
 945   sparclite_ops.to_insert_exec_catchpoint = NULL;
 946   sparclite_ops.to_remove_exec_catchpoint = NULL;
 947   sparclite_ops.to_has_execd = NULL;
 948   sparclite_ops.to_reported_exec_events_per_exec_call = NULL;
 949   sparclite_ops.to_has_exited = NULL;
 950   sparclite_ops.to_mourn_inferior =   0;
 951   sparclite_ops.to_can_run  =   0;
 952   sparclite_ops.to_notice_signals =   0;
 953   sparclite_ops.to_thread_alive  =   0;
 954   sparclite_ops.to_stop  =   0;
 955   sparclite_ops.to_pid_to_exec_file = NULL;
 956   sparclite_ops.to_core_file_to_sym_file = NULL;
 957   sparclite_ops.to_stratum =   download_stratum;
 958   sparclite_ops.DONT_USE =   0;
 959   sparclite_ops.to_has_all_memory =   0;
 960   sparclite_ops.to_has_memory =   0;
 961   sparclite_ops.to_has_stack =   0;
 962   sparclite_ops.to_has_registers =   0;
 963   sparclite_ops.to_has_execution =   0;
 964   sparclite_ops.to_sections =   0;
 965   sparclite_ops.to_sections_end =   0;
 966   sparclite_ops.to_magic =   OPS_MAGIC  ;
 967 } /* init_sparclite_ops */
 968
 969 void
 970 _initialize_sparcl_tdep ()
 971 {
 972   init_sparclite_ops() ;
 973   add_target (&sparclite_ops);
 974 }