gdb/gdbserver/spu-low.c

   1 /* Low level interface to SPUs, for the remote server for GDB.
   2    Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011
   3    Free Software Foundation, Inc.
   4
   5    Contributed by Ulrich Weigand <uweigand@de.ibm.com>.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "server.h"
  23
  24 #include <sys/wait.h>
  25 #include <stdio.h>
  26 #include <sys/ptrace.h>
  27 #include <fcntl.h>
  28 #include <string.h>
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31 #include <errno.h>
  32 #include <sys/syscall.h>
  33
  34 /* Some older glibc versions do not define this.  */
  35 #ifndef __WNOTHREAD
  36 #define __WNOTHREAD     0x20000000      /* Don't wait on children of other
  37                                            threads in this group */
  38 #endif
  39
  40 #define PTRACE_TYPE_RET long
  41 #define PTRACE_TYPE_ARG3 long
  42
  43 /* Number of registers.  */
  44 #define SPU_NUM_REGS         130
  45 #define SPU_NUM_CORE_REGS    128
  46
  47 /* Special registers.  */
  48 #define SPU_ID_REGNUM        128
  49 #define SPU_PC_REGNUM        129
  50
  51 /* PPU side system calls.  */
  52 #define INSTR_SC        0x44000002
  53 #define NR_spu_run      0x0116
  54
  55 /* Get current thread ID (Linux task ID).  */
  56 #define current_ptid ((struct inferior_list_entry *)current_inferior)->id
  57
  58 /* These are used in remote-utils.c.  */
  59 int using_threads = 0;
  60
  61 /* Defined in auto-generated file reg-spu.c.  */
  62 void init_registers_spu (void);
  63
  64
  65 /* Fetch PPU register REGNO.  */
  66 static CORE_ADDR
  67 fetch_ppc_register (int regno)
  68 {
  69   PTRACE_TYPE_RET res;
  70
  71   int tid = ptid_get_lwp (current_ptid);
  72
  73 #ifndef __powerpc64__
  74   /* If running as a 32-bit process on a 64-bit system, we attempt
  75      to get the full 64-bit register content of the target process.
  76      If the PPC special ptrace call fails, we're on a 32-bit system;
  77      just fall through to the regular ptrace call in that case.  */
  78   {
  79     char buf[8];
  80
  81     errno = 0;
  82     ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
  83             (PTRACE_TYPE_ARG3) (regno * 8), buf);
  84     if (errno == 0)
  85       ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
  86               (PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4);
  87     if (errno == 0)
  88       return (CORE_ADDR) *(unsigned long long *)buf;
  89   }
  90 #endif
  91
  92   errno = 0;
  93   res = ptrace (PT_READ_U, tid,
  94                 (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0);
  95   if (errno != 0)
  96     {
  97       char mess[128];
  98       sprintf (mess, "reading PPC register #%d", regno);
  99       perror_with_name (mess);
 100     }
 101
 102   return (CORE_ADDR) (unsigned long) res;
 103 }
 104
 105 /* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID.  */
 106 static int
 107 fetch_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET *word)
 108 {
 109   errno = 0;
 110
 111 #ifndef __powerpc64__
 112   if (memaddr >> 32)
 113     {
 114       unsigned long long addr_8 = (unsigned long long) memaddr;
 115       ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
 116     }
 117   else
 118 #endif
 119     *word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0);
 120
 121   return errno;
 122 }
 123
 124 /* Store WORD into PPU memory at (aligned) MEMADDR in thread TID.  */
 125 static int
 126 store_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET word)
 127 {
 128   errno = 0;
 129
 130 #ifndef __powerpc64__
 131   if (memaddr >> 32)
 132     {
 133       unsigned long long addr_8 = (unsigned long long) memaddr;
 134       ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
 135     }
 136   else
 137 #endif
 138     ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word);
 139
 140   return errno;
 141 }
 142
 143 /* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR.  */
 144 static int
 145 fetch_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len)
 146 {
 147   int i, ret;
 148
 149   CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
 150   int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
 151                / sizeof (PTRACE_TYPE_RET));
 152   PTRACE_TYPE_RET *buffer;
 153
 154   int tid = ptid_get_lwp (current_ptid);
 155
 156   buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
 157   for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
 158     if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[i])) != 0)
 159       return ret;
 160
 161   memcpy (myaddr,
 162           (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
 163           len);
 164
 165   return 0;
 166 }
 167
 168 /* Store LEN bytes from MYADDR to PPU memory at MEMADDR.  */
 169 static int
 170 store_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len)
 171 {
 172   int i, ret;
 173
 174   CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET);
 175   int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
 176                / sizeof (PTRACE_TYPE_RET));
 177   PTRACE_TYPE_RET *buffer;
 178
 179   int tid = ptid_get_lwp (current_ptid);
 180
 181   buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
 182
 183   if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET))
 184     if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[0])) != 0)
 185       return ret;
 186
 187   if (count > 1)
 188     if ((ret = fetch_ppc_memory_1 (tid, addr + (count - 1)
 189                                                * sizeof (PTRACE_TYPE_RET),
 190                                    &buffer[count - 1])) != 0)
 191       return ret;
 192
 193   memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
 194           myaddr, len);
 195
 196   for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
 197     if ((ret = store_ppc_memory_1 (tid, addr, buffer[i])) != 0)
 198       return ret;
 199
 200   return 0;
 201 }
 202
 203
 204 /* If the PPU thread is currently stopped on a spu_run system call,
 205    return to FD and ADDR the file handle and NPC parameter address
 206    used with the system call.  Return non-zero if successful.  */
 207 static int
 208 parse_spufs_run (int *fd, CORE_ADDR *addr)
 209 {
 210   char buf[4];
 211   CORE_ADDR pc = fetch_ppc_register (32);  /* nip */
 212
 213   /* Fetch instruction preceding current NIP.  */
 214   if (fetch_ppc_memory (pc-4, buf, 4) != 0)
 215     return 0;
 216   /* It should be a "sc" instruction.  */
 217   if (*(unsigned int *)buf != INSTR_SC)
 218     return 0;
 219   /* System call number should be NR_spu_run.  */
 220   if (fetch_ppc_register (0) != NR_spu_run)
 221     return 0;
 222
 223   /* Register 3 contains fd, register 4 the NPC param pointer.  */
 224   *fd = fetch_ppc_register (34);  /* orig_gpr3 */
 225   *addr = fetch_ppc_register (4);
 226   return 1;
 227 }
 228
 229
 230 /* Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF,
 231    using the /proc file system.  */
 232 static int
 233 spu_proc_xfer_spu (const char *annex, unsigned char *readbuf,
 234                    const unsigned char *writebuf,
 235                    CORE_ADDR offset, int len)
 236 {
 237   char buf[128];
 238   int fd = 0;
 239   int ret = -1;
 240
 241   if (!annex)
 242     return 0;
 243
 244   sprintf (buf, "/proc/%ld/fd/%s", ptid_get_lwp (current_ptid), annex);
 245   fd = open (buf, writebuf? O_WRONLY : O_RDONLY);
 246   if (fd <= 0)
 247     return -1;
 248
 249   if (offset != 0
 250       && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
 251     {
 252       close (fd);
 253       return 0;
 254     }
 255
 256   if (writebuf)
 257     ret = write (fd, writebuf, (size_t) len);
 258   else if (readbuf)
 259     ret = read (fd, readbuf, (size_t) len);
 260
 261   close (fd);
 262   return ret;
 263 }
 264
 265
 266 /* Start an inferior process and returns its pid.
 267    ALLARGS is a vector of program-name and args. */
 268 static int
 269 spu_create_inferior (char *program, char **allargs)
 270 {
 271   int pid;
 272   ptid_t ptid;
 273
 274   pid = fork ();
 275   if (pid < 0)
 276     perror_with_name ("fork");
 277
 278   if (pid == 0)
 279     {
 280       ptrace (PTRACE_TRACEME, 0, 0, 0);
 281
 282       setpgid (0, 0);
 283
 284       execv (program, allargs);
 285       if (errno == ENOENT)
 286         execvp (program, allargs);
 287
 288       fprintf (stderr, "Cannot exec %s: %s.\n", program,
 289                strerror (errno));
 290       fflush (stderr);
 291       _exit (0177);
 292     }
 293
 294   add_process (pid, 0);
 295
 296   ptid = ptid_build (pid, pid, 0);
 297   add_thread (ptid, NULL);
 298   return pid;
 299 }
 300
 301 /* Attach to an inferior process.  */
 302 int
 303 spu_attach (unsigned long  pid)
 304 {
 305   ptid_t ptid;
 306
 307   if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0)
 308     {
 309       fprintf (stderr, "Cannot attach to process %ld: %s (%d)\n", pid,
 310                strerror (errno), errno);
 311       fflush (stderr);
 312       _exit (0177);
 313     }
 314
 315   add_process (pid, 1);
 316   ptid = ptid_build (pid, pid, 0);
 317   add_thread (ptid, NULL);
 318   return 0;
 319 }
 320
 321 /* Kill the inferior process.  */
 322 static int
 323 spu_kill (int pid)
 324 {
 325   int status, ret;
 326   struct process_info *process = find_process_pid (pid);
 327   if (process == NULL)
 328     return -1;
 329
 330   ptrace (PTRACE_KILL, pid, 0, 0);
 331
 332   do {
 333     ret = waitpid (pid, &status, 0);
 334     if (WIFEXITED (status) || WIFSIGNALED (status))
 335       break;
 336   } while (ret != -1 || errno != ECHILD);
 337
 338   clear_inferiors ();
 339   remove_process (process);
 340   return 0;
 341 }
 342
 343 /* Detach from inferior process.  */
 344 static int
 345 spu_detach (int pid)
 346 {
 347   struct process_info *process = find_process_pid (pid);
 348   if (process == NULL)
 349     return -1;
 350
 351   ptrace (PTRACE_DETACH, pid, 0, 0);
 352
 353   clear_inferiors ();
 354   remove_process (process);
 355   return 0;
 356 }
 357
 358 static void
 359 spu_mourn (struct process_info *process)
 360 {
 361   remove_process (process);
 362 }
 363
 364 static void
 365 spu_join (int pid)
 366 {
 367   int status, ret;
 368
 369   do {
 370     ret = waitpid (pid, &status, 0);
 371     if (WIFEXITED (status) || WIFSIGNALED (status))
 372       break;
 373   } while (ret != -1 || errno != ECHILD);
 374 }
 375
 376 /* Return nonzero if the given thread is still alive.  */
 377 static int
 378 spu_thread_alive (ptid_t ptid)
 379 {
 380   return ptid_equal (ptid, current_ptid);
 381 }
 382
 383 /* Resume process.  */
 384 static void
 385 spu_resume (struct thread_resume *resume_info, size_t n)
 386 {
 387   size_t i;
 388
 389   for (i = 0; i < n; i++)
 390     if (ptid_equal (resume_info[i].thread, minus_one_ptid)
 391         || ptid_equal (resume_info[i].thread, current_ptid))
 392       break;
 393
 394   if (i == n)
 395     return;
 396
 397   /* We don't support hardware single-stepping right now, assume
 398      GDB knows to use software single-stepping.  */
 399   if (resume_info[i].kind == resume_step)
 400     fprintf (stderr, "Hardware single-step not supported.\n");
 401
 402   regcache_invalidate ();
 403
 404   errno = 0;
 405   ptrace (PTRACE_CONT, ptid_get_lwp (current_ptid), 0, resume_info[i].sig);
 406   if (errno)
 407     perror_with_name ("ptrace");
 408 }
 409
 410 /* Wait for process, returns status.  */
 411 static ptid_t
 412 spu_wait (ptid_t ptid, struct target_waitstatus *ourstatus, int options)
 413 {
 414   int pid = ptid_get_pid (ptid);
 415   int w;
 416   int ret;
 417
 418   while (1)
 419     {
 420       ret = waitpid (pid, &w, WNOHANG | __WALL | __WNOTHREAD);
 421
 422       if (ret == -1)
 423         {
 424           if (errno != ECHILD)
 425             perror_with_name ("waitpid");
 426         }
 427       else if (ret > 0)
 428         break;
 429
 430       usleep (1000);
 431     }
 432
 433   /* On the first wait, continue running the inferior until we are
 434      blocked inside an spu_run system call.  */
 435   if (!server_waiting)
 436     {
 437       int fd;
 438       CORE_ADDR addr;
 439
 440       while (!parse_spufs_run (&fd, &addr))
 441         {
 442           ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0);
 443           waitpid (pid, NULL, __WALL | __WNOTHREAD);
 444         }
 445     }
 446
 447   if (WIFEXITED (w))
 448     {
 449       fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w));
 450       ourstatus->kind =  TARGET_WAITKIND_EXITED;
 451       ourstatus->value.integer = WEXITSTATUS (w);
 452       clear_inferiors ();
 453       return pid_to_ptid (ret);
 454     }
 455   else if (!WIFSTOPPED (w))
 456     {
 457       fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w));
 458       ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
 459       ourstatus->value.sig = target_signal_from_host (WTERMSIG (w));
 460       clear_inferiors ();
 461       return pid_to_ptid (ret);
 462     }
 463
 464   /* After attach, we may have received a SIGSTOP.  Do not return this
 465      as signal to GDB, or else it will try to continue with SIGSTOP ...  */
 466   if (!server_waiting)
 467     {
 468       ourstatus->kind = TARGET_WAITKIND_STOPPED;
 469       ourstatus->value.sig = TARGET_SIGNAL_0;
 470       return ptid_build (ret, ret, 0);
 471     }
 472
 473   ourstatus->kind = TARGET_WAITKIND_STOPPED;
 474   ourstatus->value.sig = target_signal_from_host (WSTOPSIG (w));
 475   return ptid_build (ret, ret, 0);
 476 }
 477
 478 /* Fetch inferior registers.  */
 479 static void
 480 spu_fetch_registers (struct regcache *regcache, int regno)
 481 {
 482   int fd;
 483   CORE_ADDR addr;
 484
 485   /* We must be stopped on a spu_run system call.  */
 486   if (!parse_spufs_run (&fd, &addr))
 487     return;
 488
 489   /* The ID register holds the spufs file handle.  */
 490   if (regno == -1 || regno == SPU_ID_REGNUM)
 491     supply_register (regcache, SPU_ID_REGNUM, (char *)&fd);
 492
 493   /* The NPC register is found at ADDR.  */
 494   if (regno == -1 || regno == SPU_PC_REGNUM)
 495     {
 496       char buf[4];
 497       if (fetch_ppc_memory (addr, buf, 4) == 0)
 498         supply_register (regcache, SPU_PC_REGNUM, buf);
 499     }
 500
 501   /* The GPRs are found in the "regs" spufs file.  */
 502   if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS))
 503     {
 504       unsigned char buf[16*SPU_NUM_CORE_REGS];
 505       char annex[32];
 506       int i;
 507
 508       sprintf (annex, "%d/regs", fd);
 509       if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf)
 510         for (i = 0; i < SPU_NUM_CORE_REGS; i++)
 511           supply_register (regcache, i, buf + i*16);
 512     }
 513 }
 514
 515 /* Store inferior registers.  */
 516 static void
 517 spu_store_registers (struct regcache *regcache, int regno)
 518 {
 519   int fd;
 520   CORE_ADDR addr;
 521
 522   /* ??? Some callers use 0 to mean all registers.  */
 523   if (regno == 0)
 524     regno = -1;
 525
 526   /* We must be stopped on a spu_run system call.  */
 527   if (!parse_spufs_run (&fd, &addr))
 528     return;
 529
 530   /* The NPC register is found at ADDR.  */
 531   if (regno == -1 || regno == SPU_PC_REGNUM)
 532     {
 533       char buf[4];
 534       collect_register (regcache, SPU_PC_REGNUM, buf);
 535       store_ppc_memory (addr, buf, 4);
 536     }
 537
 538   /* The GPRs are found in the "regs" spufs file.  */
 539   if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS))
 540     {
 541       unsigned char buf[16*SPU_NUM_CORE_REGS];
 542       char annex[32];
 543       int i;
 544
 545       for (i = 0; i < SPU_NUM_CORE_REGS; i++)
 546         collect_register (regcache, i, buf + i*16);
 547
 548       sprintf (annex, "%d/regs", fd);
 549       spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf);
 550     }
 551 }
 552
 553 /* Copy LEN bytes from inferior's memory starting at MEMADDR
 554    to debugger memory starting at MYADDR.  */
 555 static int
 556 spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
 557 {
 558   int fd, ret;
 559   CORE_ADDR addr;
 560   char annex[32], lslr_annex[32], buf[32];
 561   CORE_ADDR lslr;
 562
 563   /* We must be stopped on a spu_run system call.  */
 564   if (!parse_spufs_run (&fd, &addr))
 565     return 0;
 566
 567   /* Use the "mem" spufs file to access SPU local store.  */
 568   sprintf (annex, "%d/mem", fd);
 569   ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len);
 570   if (ret > 0)
 571     return ret == len ? 0 : EIO;
 572
 573   /* SPU local store access wraps the address around at the
 574      local store limit.  We emulate this here.  To avoid needing
 575      an extra access to retrieve the LSLR, we only do that after
 576      trying the original address first, and getting end-of-file.  */
 577   sprintf (lslr_annex, "%d/lslr", fd);
 578   memset (buf, 0, sizeof buf);
 579   if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL,
 580                          0, sizeof buf) <= 0)
 581     return ret;
 582
 583   lslr = strtoul (buf, NULL, 16);
 584   ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr & lslr, len);
 585
 586   return ret == len ? 0 : EIO;
 587 }
 588
 589 /* Copy LEN bytes of data from debugger memory at MYADDR
 590    to inferior's memory at MEMADDR.
 591    On failure (cannot write the inferior)
 592    returns the value of errno.  */
 593 static int
 594 spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len)
 595 {
 596   int fd, ret;
 597   CORE_ADDR addr;
 598   char annex[32], lslr_annex[32], buf[32];
 599   CORE_ADDR lslr;
 600
 601   /* We must be stopped on a spu_run system call.  */
 602   if (!parse_spufs_run (&fd, &addr))
 603     return 0;
 604
 605   /* Use the "mem" spufs file to access SPU local store.  */
 606   sprintf (annex, "%d/mem", fd);
 607   ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len);
 608   if (ret > 0)
 609     return ret == len ? 0 : EIO;
 610
 611   /* SPU local store access wraps the address around at the
 612      local store limit.  We emulate this here.  To avoid needing
 613      an extra access to retrieve the LSLR, we only do that after
 614      trying the original address first, and getting end-of-file.  */
 615   sprintf (lslr_annex, "%d/lslr", fd);
 616   memset (buf, 0, sizeof buf);
 617   if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL,
 618                          0, sizeof buf) <= 0)
 619     return ret;
 620
 621   lslr = strtoul (buf, NULL, 16);
 622   ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr & lslr, len);
 623
 624   return ret == len ? 0 : EIO;
 625 }
 626
 627 /* Look up special symbols -- unneded here.  */
 628 static void
 629 spu_look_up_symbols (void)
 630 {
 631 }
 632
 633 /* Send signal to inferior.  */
 634 static void
 635 spu_request_interrupt (void)
 636 {
 637   syscall (SYS_tkill, ptid_get_lwp (current_ptid), SIGINT);
 638 }
 639
 640 static struct target_ops spu_target_ops = {
 641   spu_create_inferior,
 642   spu_attach,
 643   spu_kill,
 644   spu_detach,
 645   spu_mourn,
 646   spu_join,
 647   spu_thread_alive,
 648   spu_resume,
 649   spu_wait,
 650   spu_fetch_registers,
 651   spu_store_registers,
 652   NULL, /* prepare_to_access_memory */
 653   NULL, /* done_accessing_memory */
 654   spu_read_memory,
 655   spu_write_memory,
 656   spu_look_up_symbols,
 657   spu_request_interrupt,
 658   NULL,
 659   NULL,
 660   NULL,
 661   NULL,
 662   NULL,
 663   NULL,
 664   NULL,
 665   spu_proc_xfer_spu,
 666   hostio_last_error_from_errno,
 667 };
 668
 669 void
 670 initialize_low (void)
 671 {
 672   static const unsigned char breakpoint[] = { 0x00, 0x00, 0x3f, 0xff };
 673
 674   set_target_ops (&spu_target_ops);
 675   set_breakpoint_data (breakpoint, sizeof breakpoint);
 676   init_registers_spu ();
 677 }