gdb/spu-linux-nat.c

   1 /* SPU native-dependent code for GDB, the GNU debugger.
   2    Copyright (C) 2006-2015 Free Software Foundation, Inc.
   3
   4    Contributed by Ulrich Weigand <uweigand@de.ibm.com>.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "gdbcore.h"
  23 #include "target.h"
  24 #include "inferior.h"
  25 #include "inf-child.h"
  26 #include "inf-ptrace.h"
  27 #include "regcache.h"
  28 #include "symfile.h"
  29 #include "gdb_wait.h"
  30 #include "gdbthread.h"
  31 #include "gdb_bfd.h"
  32
  33 #include <sys/ptrace.h>
  34 #include <asm/ptrace.h>
  35 #include <sys/types.h>
  36
  37 #include "spu-tdep.h"
  38
  39 /* PPU side system calls.  */
  40 #define INSTR_SC        0x44000002
  41 #define NR_spu_run      0x0116
  42
  43
  44 /* Fetch PPU register REGNO.  */
  45 static ULONGEST
  46 fetch_ppc_register (int regno)
  47 {
  48   PTRACE_TYPE_RET res;
  49
  50   int tid = ptid_get_lwp (inferior_ptid);
  51   if (tid == 0)
  52     tid = ptid_get_pid (inferior_ptid);
  53
  54 #ifndef __powerpc64__
  55   /* If running as a 32-bit process on a 64-bit system, we attempt
  56      to get the full 64-bit register content of the target process.
  57      If the PPC special ptrace call fails, we're on a 32-bit system;
  58      just fall through to the regular ptrace call in that case.  */
  59   {
  60     gdb_byte buf[8];
  61
  62     errno = 0;
  63     ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
  64             (PTRACE_TYPE_ARG3) (regno * 8), buf);
  65     if (errno == 0)
  66       ptrace (PPC_PTRACE_PEEKUSR_3264, tid,
  67               (PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4);
  68     if (errno == 0)
  69       return (ULONGEST) *(uint64_t *)buf;
  70   }
  71 #endif
  72
  73   errno = 0;
  74   res = ptrace (PT_READ_U, tid,
  75                 (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0);
  76   if (errno != 0)
  77     {
  78       char mess[128];
  79       xsnprintf (mess, sizeof mess, "reading PPC register #%d", regno);
  80       perror_with_name (_(mess));
  81     }
  82
  83   return (ULONGEST) (unsigned long) res;
  84 }
  85
  86 /* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID.  */
  87 static int
  88 fetch_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET *word)
  89 {
  90   errno = 0;
  91
  92 #ifndef __powerpc64__
  93   if (memaddr >> 32)
  94     {
  95       uint64_t addr_8 = (uint64_t) memaddr;
  96       ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
  97     }
  98   else
  99 #endif
 100     *word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0);
 101
 102   return errno;
 103 }
 104
 105 /* Store WORD into PPU memory at (aligned) MEMADDR in thread TID.  */
 106 static int
 107 store_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET word)
 108 {
 109   errno = 0;
 110
 111 #ifndef __powerpc64__
 112   if (memaddr >> 32)
 113     {
 114       uint64_t addr_8 = (uint64_t) memaddr;
 115       ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word);
 116     }
 117   else
 118 #endif
 119     ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word);
 120
 121   return errno;
 122 }
 123
 124 /* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR.  */
 125 static int
 126 fetch_ppc_memory (ULONGEST memaddr, gdb_byte *myaddr, int len)
 127 {
 128   int i, ret;
 129
 130   ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
 131   int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
 132                / sizeof (PTRACE_TYPE_RET));
 133   PTRACE_TYPE_RET *buffer;
 134
 135   int tid = ptid_get_lwp (inferior_ptid);
 136   if (tid == 0)
 137     tid = ptid_get_pid (inferior_ptid);
 138
 139   buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
 140   for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
 141     {
 142       ret = fetch_ppc_memory_1 (tid, addr, &buffer[i]);
 143       if (ret)
 144         return ret;
 145     }
 146
 147   memcpy (myaddr,
 148           (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
 149           len);
 150
 151   return 0;
 152 }
 153
 154 /* Store LEN bytes from MYADDR to PPU memory at MEMADDR.  */
 155 static int
 156 store_ppc_memory (ULONGEST memaddr, const gdb_byte *myaddr, int len)
 157 {
 158   int i, ret;
 159
 160   ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
 161   int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1)
 162                / sizeof (PTRACE_TYPE_RET));
 163   PTRACE_TYPE_RET *buffer;
 164
 165   int tid = ptid_get_lwp (inferior_ptid);
 166   if (tid == 0)
 167     tid = ptid_get_pid (inferior_ptid);
 168
 169   buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET));
 170
 171   if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET))
 172     {
 173       ret = fetch_ppc_memory_1 (tid, addr, &buffer[0]);
 174       if (ret)
 175         return ret;
 176     }
 177
 178   if (count > 1)
 179     {
 180       ret = fetch_ppc_memory_1 (tid, addr + (count - 1)
 181                                                * sizeof (PTRACE_TYPE_RET),
 182                                 &buffer[count - 1]);
 183       if (ret)
 184         return ret;
 185     }
 186
 187   memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)),
 188           myaddr, len);
 189
 190   for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET))
 191     {
 192       ret = store_ppc_memory_1 (tid, addr, buffer[i]);
 193       if (ret)
 194         return ret;
 195     }
 196
 197   return 0;
 198 }
 199
 200
 201 /* If the PPU thread is currently stopped on a spu_run system call,
 202    return to FD and ADDR the file handle and NPC parameter address
 203    used with the system call.  Return non-zero if successful.  */
 204 static int
 205 parse_spufs_run (int *fd, ULONGEST *addr)
 206 {
 207   enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
 208   gdb_byte buf[4];
 209   ULONGEST pc = fetch_ppc_register (32);  /* nip */
 210
 211   /* Fetch instruction preceding current NIP.  */
 212   if (fetch_ppc_memory (pc-4, buf, 4) != 0)
 213     return 0;
 214   /* It should be a "sc" instruction.  */
 215   if (extract_unsigned_integer (buf, 4, byte_order) != INSTR_SC)
 216     return 0;
 217   /* System call number should be NR_spu_run.  */
 218   if (fetch_ppc_register (0) != NR_spu_run)
 219     return 0;
 220
 221   /* Register 3 contains fd, register 4 the NPC param pointer.  */
 222   *fd = fetch_ppc_register (34);  /* orig_gpr3 */
 223   *addr = fetch_ppc_register (4);
 224   return 1;
 225 }
 226
 227
 228 /* Implement the to_xfer_partial target_ops method for TARGET_OBJECT_SPU.
 229    Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF,
 230    using the /proc file system.  */
 231
 232 static enum target_xfer_status
 233 spu_proc_xfer_spu (const char *annex, gdb_byte *readbuf,
 234                    const gdb_byte *writebuf,
 235                    ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
 236 {
 237   char buf[128];
 238   int fd = 0;
 239   int ret = -1;
 240   int pid = ptid_get_pid (inferior_ptid);
 241
 242   if (!annex)
 243     return TARGET_XFER_EOF;
 244
 245   xsnprintf (buf, sizeof buf, "/proc/%d/fd/%s", pid, annex);
 246   fd = open (buf, writebuf? O_WRONLY : O_RDONLY);
 247   if (fd <= 0)
 248     return TARGET_XFER_E_IO;
 249
 250   if (offset != 0
 251       && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
 252     {
 253       close (fd);
 254       return TARGET_XFER_EOF;
 255     }
 256
 257   if (writebuf)
 258     ret = write (fd, writebuf, (size_t) len);
 259   else if (readbuf)
 260     ret = read (fd, readbuf, (size_t) len);
 261
 262   close (fd);
 263   if (ret < 0)
 264     return TARGET_XFER_E_IO;
 265   else if (ret == 0)
 266     return TARGET_XFER_EOF;
 267   else
 268     {
 269       *xfered_len = (ULONGEST) ret;
 270       return TARGET_XFER_OK;
 271     }
 272 }
 273
 274
 275 /* Inferior memory should contain an SPE executable image at location ADDR.
 276    Allocate a BFD representing that executable.  Return NULL on error.  */
 277
 278 static void *
 279 spu_bfd_iovec_open (struct bfd *nbfd, void *open_closure)
 280 {
 281   return open_closure;
 282 }
 283
 284 static int
 285 spu_bfd_iovec_close (struct bfd *nbfd, void *stream)
 286 {
 287   xfree (stream);
 288
 289   /* Zero means success.  */
 290   return 0;
 291 }
 292
 293 static file_ptr
 294 spu_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf,
 295                      file_ptr nbytes, file_ptr offset)
 296 {
 297   ULONGEST addr = *(ULONGEST *)stream;
 298
 299   if (fetch_ppc_memory (addr + offset, buf, nbytes) != 0)
 300     {
 301       bfd_set_error (bfd_error_invalid_operation);
 302       return -1;
 303     }
 304
 305   return nbytes;
 306 }
 307
 308 static int
 309 spu_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb)
 310 {
 311   /* We don't have an easy way of finding the size of embedded spu
 312      images.  We could parse the in-memory ELF header and section
 313      table to find the extent of the last section but that seems
 314      pointless when the size is needed only for checks of other
 315      parsed values in dbxread.c.  */
 316   sb->st_size = INT_MAX;
 317   return 0;
 318 }
 319
 320 static bfd *
 321 spu_bfd_open (ULONGEST addr)
 322 {
 323   struct bfd *nbfd;
 324   asection *spu_name;
 325
 326   ULONGEST *open_closure = xmalloc (sizeof (ULONGEST));
 327   *open_closure = addr;
 328
 329   nbfd = gdb_bfd_openr_iovec ("<in-memory>", "elf32-spu",
 330                               spu_bfd_iovec_open, open_closure,
 331                               spu_bfd_iovec_pread, spu_bfd_iovec_close,
 332                               spu_bfd_iovec_stat);
 333   if (!nbfd)
 334     return NULL;
 335
 336   if (!bfd_check_format (nbfd, bfd_object))
 337     {
 338       gdb_bfd_unref (nbfd);
 339       return NULL;
 340     }
 341
 342   /* Retrieve SPU name note and update BFD name.  */
 343   spu_name = bfd_get_section_by_name (nbfd, ".note.spu_name");
 344   if (spu_name)
 345     {
 346       int sect_size = bfd_section_size (nbfd, spu_name);
 347       if (sect_size > 20)
 348         {
 349           char *buf = alloca (sect_size - 20 + 1);
 350           bfd_get_section_contents (nbfd, spu_name, buf, 20, sect_size - 20);
 351           buf[sect_size - 20] = '\0';
 352
 353           xfree ((char *)nbfd->filename);
 354           nbfd->filename = xstrdup (buf);
 355         }
 356     }
 357
 358   return nbfd;
 359 }
 360
 361 /* INFERIOR_FD is a file handle passed by the inferior to the
 362    spu_run system call.  Assuming the SPE context was allocated
 363    by the libspe library, try to retrieve the main SPE executable
 364    file from its copy within the target process.  */
 365 static void
 366 spu_symbol_file_add_from_memory (int inferior_fd)
 367 {
 368   ULONGEST addr;
 369   struct bfd *nbfd;
 370
 371   gdb_byte id[128];
 372   char annex[32];
 373   ULONGEST len;
 374   enum target_xfer_status status;
 375
 376   /* Read object ID.  */
 377   xsnprintf (annex, sizeof annex, "%d/object-id", inferior_fd);
 378   status = spu_proc_xfer_spu (annex, id, NULL, 0, sizeof id, &len);
 379   if (status != TARGET_XFER_OK || len >= sizeof id)
 380     return;
 381   id[len] = 0;
 382   addr = strtoulst ((const char *) id, NULL, 16);
 383   if (!addr)
 384     return;
 385
 386   /* Open BFD representing SPE executable and read its symbols.  */
 387   nbfd = spu_bfd_open (addr);
 388   if (nbfd)
 389     {
 390       struct cleanup *cleanup = make_cleanup_bfd_unref (nbfd);
 391
 392       symbol_file_add_from_bfd (nbfd, bfd_get_filename (nbfd),
 393                                 SYMFILE_VERBOSE | SYMFILE_MAINLINE,
 394                                 NULL, 0, NULL);
 395       do_cleanups (cleanup);
 396     }
 397 }
 398
 399
 400 /* Override the post_startup_inferior routine to continue running
 401    the inferior until the first spu_run system call.  */
 402 static void
 403 spu_child_post_startup_inferior (struct target_ops *self, ptid_t ptid)
 404 {
 405   int fd;
 406   ULONGEST addr;
 407
 408   int tid = ptid_get_lwp (ptid);
 409   if (tid == 0)
 410     tid = ptid_get_pid (ptid);
 411
 412   while (!parse_spufs_run (&fd, &addr))
 413     {
 414       ptrace (PT_SYSCALL, tid, (PTRACE_TYPE_ARG3) 0, 0);
 415       waitpid (tid, NULL, __WALL | __WNOTHREAD);
 416     }
 417 }
 418
 419 /* Override the post_attach routine to try load the SPE executable
 420    file image from its copy inside the target process.  */
 421 static void
 422 spu_child_post_attach (struct target_ops *self, int pid)
 423 {
 424   int fd;
 425   ULONGEST addr;
 426
 427   /* Like child_post_startup_inferior, if we happened to attach to
 428      the inferior while it wasn't currently in spu_run, continue
 429      running it until we get back there.  */
 430   while (!parse_spufs_run (&fd, &addr))
 431     {
 432       ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0);
 433       waitpid (pid, NULL, __WALL | __WNOTHREAD);
 434     }
 435
 436   /* If the user has not provided an executable file, try to extract
 437      the image from inside the target process.  */
 438   if (!get_exec_file (0))
 439     spu_symbol_file_add_from_memory (fd);
 440 }
 441
 442 /* Wait for child PTID to do something.  Return id of the child,
 443    minus_one_ptid in case of error; store status into *OURSTATUS.  */
 444 static ptid_t
 445 spu_child_wait (struct target_ops *ops,
 446                 ptid_t ptid, struct target_waitstatus *ourstatus, int options)
 447 {
 448   int save_errno;
 449   int status;
 450   pid_t pid;
 451
 452   do
 453     {
 454       set_sigint_trap ();       /* Causes SIGINT to be passed on to the
 455                                    attached process.  */
 456
 457       pid = waitpid (ptid_get_pid (ptid), &status, 0);
 458       if (pid == -1 && errno == ECHILD)
 459         /* Try again with __WCLONE to check cloned processes.  */
 460         pid = waitpid (ptid_get_pid (ptid), &status, __WCLONE);
 461
 462       save_errno = errno;
 463
 464       /* Make sure we don't report an event for the exit of the
 465          original program, if we've detached from it.  */
 466       if (pid != -1 && !WIFSTOPPED (status)
 467           && pid != ptid_get_pid (inferior_ptid))
 468         {
 469           pid = -1;
 470           save_errno = EINTR;
 471         }
 472
 473       clear_sigint_trap ();
 474     }
 475   while (pid == -1 && save_errno == EINTR);
 476
 477   if (pid == -1)
 478     {
 479       warning (_("Child process unexpectedly missing: %s"),
 480                safe_strerror (save_errno));
 481
 482       /* Claim it exited with unknown signal.  */
 483       ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
 484       ourstatus->value.sig = GDB_SIGNAL_UNKNOWN;
 485       return inferior_ptid;
 486     }
 487
 488   store_waitstatus (ourstatus, status);
 489   return pid_to_ptid (pid);
 490 }
 491
 492 /* Override the fetch_inferior_register routine.  */
 493 static void
 494 spu_fetch_inferior_registers (struct target_ops *ops,
 495                               struct regcache *regcache, int regno)
 496 {
 497   int fd;
 498   ULONGEST addr;
 499
 500   /* We must be stopped on a spu_run system call.  */
 501   if (!parse_spufs_run (&fd, &addr))
 502     return;
 503
 504   /* The ID register holds the spufs file handle.  */
 505   if (regno == -1 || regno == SPU_ID_REGNUM)
 506     {
 507       struct gdbarch *gdbarch = get_regcache_arch (regcache);
 508       enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
 509       gdb_byte buf[4];
 510       store_unsigned_integer (buf, 4, byte_order, fd);
 511       regcache_raw_supply (regcache, SPU_ID_REGNUM, buf);
 512     }
 513
 514   /* The NPC register is found at ADDR.  */
 515   if (regno == -1 || regno == SPU_PC_REGNUM)
 516     {
 517       gdb_byte buf[4];
 518       if (fetch_ppc_memory (addr, buf, 4) == 0)
 519         regcache_raw_supply (regcache, SPU_PC_REGNUM, buf);
 520     }
 521
 522   /* The GPRs are found in the "regs" spufs file.  */
 523   if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS))
 524     {
 525       gdb_byte buf[16 * SPU_NUM_GPRS];
 526       char annex[32];
 527       int i;
 528       ULONGEST len;
 529
 530       xsnprintf (annex, sizeof annex, "%d/regs", fd);
 531       if ((spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf, &len)
 532            == TARGET_XFER_OK)
 533           && len == sizeof buf)
 534         for (i = 0; i < SPU_NUM_GPRS; i++)
 535           regcache_raw_supply (regcache, i, buf + i*16);
 536     }
 537 }
 538
 539 /* Override the store_inferior_register routine.  */
 540 static void
 541 spu_store_inferior_registers (struct target_ops *ops,
 542                               struct regcache *regcache, int regno)
 543 {
 544   int fd;
 545   ULONGEST addr;
 546
 547   /* We must be stopped on a spu_run system call.  */
 548   if (!parse_spufs_run (&fd, &addr))
 549     return;
 550
 551   /* The NPC register is found at ADDR.  */
 552   if (regno == -1 || regno == SPU_PC_REGNUM)
 553     {
 554       gdb_byte buf[4];
 555       regcache_raw_collect (regcache, SPU_PC_REGNUM, buf);
 556       store_ppc_memory (addr, buf, 4);
 557     }
 558
 559   /* The GPRs are found in the "regs" spufs file.  */
 560   if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS))
 561     {
 562       gdb_byte buf[16 * SPU_NUM_GPRS];
 563       char annex[32];
 564       int i;
 565       ULONGEST len;
 566
 567       for (i = 0; i < SPU_NUM_GPRS; i++)
 568         regcache_raw_collect (regcache, i, buf + i*16);
 569
 570       xsnprintf (annex, sizeof annex, "%d/regs", fd);
 571       spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf, &len);
 572     }
 573 }
 574
 575 /* Override the to_xfer_partial routine.  */
 576 static enum target_xfer_status
 577 spu_xfer_partial (struct target_ops *ops,
 578                   enum target_object object, const char *annex,
 579                   gdb_byte *readbuf, const gdb_byte *writebuf,
 580                   ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
 581 {
 582   if (object == TARGET_OBJECT_SPU)
 583     return spu_proc_xfer_spu (annex, readbuf, writebuf, offset, len,
 584                               xfered_len);
 585
 586   if (object == TARGET_OBJECT_MEMORY)
 587     {
 588       int fd;
 589       ULONGEST addr;
 590       char mem_annex[32], lslr_annex[32];
 591       gdb_byte buf[32];
 592       ULONGEST lslr;
 593       enum target_xfer_status ret;
 594
 595       /* We must be stopped on a spu_run system call.  */
 596       if (!parse_spufs_run (&fd, &addr))
 597         return TARGET_XFER_EOF;
 598
 599       /* Use the "mem" spufs file to access SPU local store.  */
 600       xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd);
 601       ret = spu_proc_xfer_spu (mem_annex, readbuf, writebuf, offset, len,
 602                                xfered_len);
 603       if (ret == TARGET_XFER_OK)
 604         return ret;
 605
 606       /* SPU local store access wraps the address around at the
 607          local store limit.  We emulate this here.  To avoid needing
 608          an extra access to retrieve the LSLR, we only do that after
 609          trying the original address first, and getting end-of-file.  */
 610       xsnprintf (lslr_annex, sizeof lslr_annex, "%d/lslr", fd);
 611       memset (buf, 0, sizeof buf);
 612       if (spu_proc_xfer_spu (lslr_annex, buf, NULL, 0, sizeof buf, xfered_len)
 613           != TARGET_XFER_OK)
 614         return ret;
 615
 616       lslr = strtoulst ((const char *) buf, NULL, 16);
 617       return spu_proc_xfer_spu (mem_annex, readbuf, writebuf,
 618                                 offset & lslr, len, xfered_len);
 619     }
 620
 621   return TARGET_XFER_E_IO;
 622 }
 623
 624 /* Override the to_can_use_hw_breakpoint routine.  */
 625 static int
 626 spu_can_use_hw_breakpoint (struct target_ops *self,
 627                            int type, int cnt, int othertype)
 628 {
 629   return 0;
 630 }
 631
 632 /* -Wmissing-prototypes */
 633 extern initialize_file_ftype _initialize_spu_nat;
 634
 635 /* Initialize SPU native target.  */
 636 void
 637 _initialize_spu_nat (void)
 638 {
 639   /* Generic ptrace methods.  */
 640   struct target_ops *t;
 641   t = inf_ptrace_target ();
 642
 643   /* Add SPU methods.  */
 644   t->to_post_attach = spu_child_post_attach;
 645   t->to_post_startup_inferior = spu_child_post_startup_inferior;
 646   t->to_wait = spu_child_wait;
 647   t->to_fetch_registers = spu_fetch_inferior_registers;
 648   t->to_store_registers = spu_store_inferior_registers;
 649   t->to_xfer_partial = spu_xfer_partial;
 650   t->to_can_use_hw_breakpoint = spu_can_use_hw_breakpoint;
 651
 652   /* Register SPU target.  */
 653   add_target (t);
 654 }