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771b4502 | 1 | /* SPU native-dependent code for GDB, the GNU debugger. |
9b254dd1 | 2 | Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc. |
771b4502 UW |
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 | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
771b4502 UW |
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 | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
771b4502 UW |
20 | |
21 | #include "defs.h" | |
22 | #include "gdbcore.h" | |
23 | #include "gdb_string.h" | |
24 | #include "target.h" | |
25 | #include "inferior.h" | |
26 | #include "inf-ptrace.h" | |
27 | #include "regcache.h" | |
28 | #include "symfile.h" | |
29 | #include "gdb_wait.h" | |
30 | ||
31 | #include <sys/ptrace.h> | |
32 | #include <asm/ptrace.h> | |
33 | #include <sys/types.h> | |
34 | #include <sys/param.h> | |
35 | ||
36 | #include "spu-tdep.h" | |
37 | ||
38 | /* PPU side system calls. */ | |
39 | #define INSTR_SC 0x44000002 | |
40 | #define NR_spu_run 0x0116 | |
41 | ||
42 | ||
43 | /* Fetch PPU register REGNO. */ | |
4179a487 | 44 | static ULONGEST |
771b4502 UW |
45 | fetch_ppc_register (int regno) |
46 | { | |
47 | PTRACE_TYPE_RET res; | |
48 | ||
49 | int tid = TIDGET (inferior_ptid); | |
50 | if (tid == 0) | |
51 | tid = PIDGET (inferior_ptid); | |
52 | ||
53 | #ifndef __powerpc64__ | |
54 | /* If running as a 32-bit process on a 64-bit system, we attempt | |
55 | to get the full 64-bit register content of the target process. | |
56 | If the PPC special ptrace call fails, we're on a 32-bit system; | |
57 | just fall through to the regular ptrace call in that case. */ | |
58 | { | |
59 | gdb_byte buf[8]; | |
60 | ||
61 | errno = 0; | |
62 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
63 | (PTRACE_TYPE_ARG3) (regno * 8), buf); | |
64 | if (errno == 0) | |
65 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
66 | (PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4); | |
67 | if (errno == 0) | |
b9efddcd | 68 | return (ULONGEST) *(uint64_t *)buf; |
771b4502 UW |
69 | } |
70 | #endif | |
71 | ||
72 | errno = 0; | |
73 | res = ptrace (PT_READ_U, tid, | |
74 | (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0); | |
75 | if (errno != 0) | |
76 | { | |
77 | char mess[128]; | |
78 | xsnprintf (mess, sizeof mess, "reading PPC register #%d", regno); | |
79 | perror_with_name (_(mess)); | |
80 | } | |
81 | ||
4179a487 | 82 | return (ULONGEST) (unsigned long) res; |
771b4502 UW |
83 | } |
84 | ||
85 | /* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */ | |
86 | static int | |
4179a487 | 87 | fetch_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET *word) |
771b4502 UW |
88 | { |
89 | errno = 0; | |
90 | ||
91 | #ifndef __powerpc64__ | |
92 | if (memaddr >> 32) | |
93 | { | |
b9efddcd | 94 | uint64_t addr_8 = (uint64_t) memaddr; |
771b4502 UW |
95 | ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); |
96 | } | |
97 | else | |
98 | #endif | |
99 | *word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0); | |
100 | ||
101 | return errno; | |
102 | } | |
103 | ||
104 | /* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */ | |
105 | static int | |
4179a487 | 106 | store_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET word) |
771b4502 UW |
107 | { |
108 | errno = 0; | |
109 | ||
110 | #ifndef __powerpc64__ | |
111 | if (memaddr >> 32) | |
112 | { | |
b9efddcd | 113 | uint64_t addr_8 = (uint64_t) memaddr; |
771b4502 UW |
114 | ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); |
115 | } | |
116 | else | |
117 | #endif | |
118 | ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word); | |
119 | ||
120 | return errno; | |
121 | } | |
122 | ||
123 | /* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */ | |
124 | static int | |
4179a487 | 125 | fetch_ppc_memory (ULONGEST memaddr, gdb_byte *myaddr, int len) |
771b4502 UW |
126 | { |
127 | int i, ret; | |
128 | ||
4179a487 | 129 | ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET); |
771b4502 UW |
130 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) |
131 | / sizeof (PTRACE_TYPE_RET)); | |
132 | PTRACE_TYPE_RET *buffer; | |
133 | ||
134 | int tid = TIDGET (inferior_ptid); | |
135 | if (tid == 0) | |
136 | tid = PIDGET (inferior_ptid); | |
137 | ||
138 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
139 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
140 | { |
141 | ret = fetch_ppc_memory_1 (tid, addr, &buffer[i]); | |
142 | if (ret) | |
143 | return ret; | |
144 | } | |
771b4502 UW |
145 | |
146 | memcpy (myaddr, | |
147 | (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
148 | len); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | /* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */ | |
154 | static int | |
4179a487 | 155 | store_ppc_memory (ULONGEST memaddr, const gdb_byte *myaddr, int len) |
771b4502 UW |
156 | { |
157 | int i, ret; | |
158 | ||
4179a487 | 159 | ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET); |
771b4502 UW |
160 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) |
161 | / sizeof (PTRACE_TYPE_RET)); | |
162 | PTRACE_TYPE_RET *buffer; | |
163 | ||
164 | int tid = TIDGET (inferior_ptid); | |
165 | if (tid == 0) | |
166 | tid = PIDGET (inferior_ptid); | |
167 | ||
168 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
169 | ||
170 | if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
171 | { |
172 | ret = fetch_ppc_memory_1 (tid, addr, &buffer[0]); | |
173 | if (ret) | |
174 | return ret; | |
175 | } | |
771b4502 UW |
176 | |
177 | if (count > 1) | |
b9efddcd UW |
178 | { |
179 | ret = fetch_ppc_memory_1 (tid, addr + (count - 1) | |
771b4502 | 180 | * sizeof (PTRACE_TYPE_RET), |
b9efddcd UW |
181 | &buffer[count - 1]); |
182 | if (ret) | |
183 | return ret; | |
184 | } | |
771b4502 UW |
185 | |
186 | memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
187 | myaddr, len); | |
188 | ||
189 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
190 | { |
191 | ret = store_ppc_memory_1 (tid, addr, buffer[i]); | |
192 | if (ret) | |
193 | return ret; | |
194 | } | |
771b4502 UW |
195 | |
196 | return 0; | |
197 | } | |
198 | ||
199 | ||
200 | /* If the PPU thread is currently stopped on a spu_run system call, | |
201 | return to FD and ADDR the file handle and NPC parameter address | |
202 | used with the system call. Return non-zero if successful. */ | |
203 | static int | |
4179a487 | 204 | parse_spufs_run (int *fd, ULONGEST *addr) |
771b4502 UW |
205 | { |
206 | gdb_byte buf[4]; | |
4179a487 | 207 | ULONGEST pc = fetch_ppc_register (32); /* nip */ |
771b4502 UW |
208 | |
209 | /* Fetch instruction preceding current NIP. */ | |
210 | if (fetch_ppc_memory (pc-4, buf, 4) != 0) | |
211 | return 0; | |
212 | /* It should be a "sc" instruction. */ | |
213 | if (extract_unsigned_integer (buf, 4) != INSTR_SC) | |
214 | return 0; | |
215 | /* System call number should be NR_spu_run. */ | |
216 | if (fetch_ppc_register (0) != NR_spu_run) | |
217 | return 0; | |
218 | ||
219 | /* Register 3 contains fd, register 4 the NPC param pointer. */ | |
220 | *fd = fetch_ppc_register (34); /* orig_gpr3 */ | |
221 | *addr = fetch_ppc_register (4); | |
222 | return 1; | |
223 | } | |
224 | ||
225 | ||
226 | /* Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF, | |
227 | using the /proc file system. */ | |
228 | static LONGEST | |
229 | spu_proc_xfer_spu (const char *annex, gdb_byte *readbuf, | |
230 | const gdb_byte *writebuf, | |
231 | ULONGEST offset, LONGEST len) | |
232 | { | |
233 | char buf[128]; | |
234 | int fd = 0; | |
235 | int ret = -1; | |
236 | int pid = PIDGET (inferior_ptid); | |
237 | ||
238 | if (!annex) | |
239 | return 0; | |
240 | ||
241 | xsnprintf (buf, sizeof buf, "/proc/%d/fd/%s", pid, annex); | |
242 | fd = open (buf, writebuf? O_WRONLY : O_RDONLY); | |
243 | if (fd <= 0) | |
244 | return -1; | |
245 | ||
246 | if (offset != 0 | |
247 | && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) | |
248 | { | |
249 | close (fd); | |
374c1d38 | 250 | return 0; |
771b4502 UW |
251 | } |
252 | ||
253 | if (writebuf) | |
254 | ret = write (fd, writebuf, (size_t) len); | |
255 | else if (readbuf) | |
256 | ret = read (fd, readbuf, (size_t) len); | |
257 | ||
258 | close (fd); | |
259 | return ret; | |
260 | } | |
261 | ||
262 | ||
263 | /* Inferior memory should contain an SPE executable image at location ADDR. | |
264 | Allocate a BFD representing that executable. Return NULL on error. */ | |
265 | ||
266 | static void * | |
267 | spu_bfd_iovec_open (struct bfd *nbfd, void *open_closure) | |
268 | { | |
269 | return open_closure; | |
270 | } | |
271 | ||
272 | static int | |
273 | spu_bfd_iovec_close (struct bfd *nbfd, void *stream) | |
274 | { | |
275 | xfree (stream); | |
276 | return 1; | |
277 | } | |
278 | ||
279 | static file_ptr | |
280 | spu_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
281 | file_ptr nbytes, file_ptr offset) | |
282 | { | |
4179a487 | 283 | ULONGEST addr = *(ULONGEST *)stream; |
771b4502 UW |
284 | |
285 | if (fetch_ppc_memory (addr + offset, buf, nbytes) != 0) | |
286 | { | |
287 | bfd_set_error (bfd_error_invalid_operation); | |
288 | return -1; | |
289 | } | |
290 | ||
291 | return nbytes; | |
292 | } | |
293 | ||
f6cf9273 AM |
294 | static int |
295 | spu_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
296 | { | |
297 | /* We don't have an easy way of finding the size of embedded spu | |
298 | images. We could parse the in-memory ELF header and section | |
299 | table to find the extent of the last section but that seems | |
300 | pointless when the size is needed only for checks of other | |
301 | parsed values in dbxread.c. */ | |
302 | sb->st_size = INT_MAX; | |
303 | return 0; | |
304 | } | |
305 | ||
771b4502 | 306 | static bfd * |
4179a487 | 307 | spu_bfd_open (ULONGEST addr) |
771b4502 UW |
308 | { |
309 | struct bfd *nbfd; | |
310 | ||
4179a487 | 311 | ULONGEST *open_closure = xmalloc (sizeof (ULONGEST)); |
771b4502 UW |
312 | *open_closure = addr; |
313 | ||
314 | nbfd = bfd_openr_iovec (xstrdup ("<in-memory>"), "elf32-spu", | |
315 | spu_bfd_iovec_open, open_closure, | |
f6cf9273 AM |
316 | spu_bfd_iovec_pread, spu_bfd_iovec_close, |
317 | spu_bfd_iovec_stat); | |
771b4502 UW |
318 | if (!nbfd) |
319 | return NULL; | |
320 | ||
321 | if (!bfd_check_format (nbfd, bfd_object)) | |
322 | { | |
323 | bfd_close (nbfd); | |
324 | return NULL; | |
325 | } | |
326 | ||
327 | return nbfd; | |
328 | } | |
329 | ||
330 | /* INFERIOR_FD is a file handle passed by the inferior to the | |
331 | spu_run system call. Assuming the SPE context was allocated | |
332 | by the libspe library, try to retrieve the main SPE executable | |
333 | file from its copy within the target process. */ | |
334 | static void | |
335 | spu_symbol_file_add_from_memory (int inferior_fd) | |
336 | { | |
4179a487 | 337 | ULONGEST addr; |
771b4502 UW |
338 | struct bfd *nbfd; |
339 | ||
340 | char id[128]; | |
341 | char annex[32]; | |
342 | int len; | |
343 | ||
344 | /* Read object ID. */ | |
345 | xsnprintf (annex, sizeof annex, "%d/object-id", inferior_fd); | |
346 | len = spu_proc_xfer_spu (annex, id, NULL, 0, sizeof id); | |
347 | if (len <= 0 || len >= sizeof id) | |
348 | return; | |
349 | id[len] = 0; | |
b9efddcd UW |
350 | addr = strtoulst (id, NULL, 16); |
351 | if (!addr) | |
771b4502 UW |
352 | return; |
353 | ||
354 | /* Open BFD representing SPE executable and read its symbols. */ | |
355 | nbfd = spu_bfd_open (addr); | |
356 | if (nbfd) | |
357 | symbol_file_add_from_bfd (nbfd, 0, NULL, 1, 0); | |
358 | } | |
359 | ||
360 | ||
361 | /* Override the post_startup_inferior routine to continue running | |
362 | the inferior until the first spu_run system call. */ | |
363 | static void | |
364 | spu_child_post_startup_inferior (ptid_t ptid) | |
365 | { | |
366 | int fd; | |
4179a487 | 367 | ULONGEST addr; |
771b4502 UW |
368 | |
369 | int tid = TIDGET (ptid); | |
370 | if (tid == 0) | |
371 | tid = PIDGET (ptid); | |
372 | ||
373 | while (!parse_spufs_run (&fd, &addr)) | |
374 | { | |
375 | ptrace (PT_SYSCALL, tid, (PTRACE_TYPE_ARG3) 0, 0); | |
376 | waitpid (tid, NULL, __WALL | __WNOTHREAD); | |
377 | } | |
378 | } | |
379 | ||
380 | /* Override the post_attach routine to try load the SPE executable | |
381 | file image from its copy inside the target process. */ | |
382 | static void | |
383 | spu_child_post_attach (int pid) | |
384 | { | |
385 | int fd; | |
4179a487 | 386 | ULONGEST addr; |
771b4502 UW |
387 | |
388 | /* Like child_post_startup_inferior, if we happened to attach to | |
389 | the inferior while it wasn't currently in spu_run, continue | |
390 | running it until we get back there. */ | |
391 | while (!parse_spufs_run (&fd, &addr)) | |
392 | { | |
393 | ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0); | |
394 | waitpid (pid, NULL, __WALL | __WNOTHREAD); | |
395 | } | |
396 | ||
397 | /* If the user has not provided an executable file, try to extract | |
398 | the image from inside the target process. */ | |
399 | if (!get_exec_file (0)) | |
400 | spu_symbol_file_add_from_memory (fd); | |
401 | } | |
402 | ||
403 | /* Wait for child PTID to do something. Return id of the child, | |
404 | minus_one_ptid in case of error; store status into *OURSTATUS. */ | |
405 | static ptid_t | |
406 | spu_child_wait (ptid_t ptid, struct target_waitstatus *ourstatus) | |
407 | { | |
408 | int save_errno; | |
409 | int status; | |
410 | pid_t pid; | |
411 | ||
412 | do | |
413 | { | |
414 | set_sigint_trap (); /* Causes SIGINT to be passed on to the | |
415 | attached process. */ | |
416 | set_sigio_trap (); | |
417 | ||
418 | pid = waitpid (PIDGET (ptid), &status, 0); | |
419 | if (pid == -1 && errno == ECHILD) | |
420 | /* Try again with __WCLONE to check cloned processes. */ | |
421 | pid = waitpid (PIDGET (ptid), &status, __WCLONE); | |
422 | ||
423 | save_errno = errno; | |
424 | ||
425 | /* Make sure we don't report an event for the exit of the | |
426 | original program, if we've detached from it. */ | |
427 | if (pid != -1 && !WIFSTOPPED (status) && pid != PIDGET (inferior_ptid)) | |
428 | { | |
429 | pid = -1; | |
430 | save_errno = EINTR; | |
431 | } | |
432 | ||
433 | clear_sigio_trap (); | |
434 | clear_sigint_trap (); | |
435 | } | |
436 | while (pid == -1 && save_errno == EINTR); | |
437 | ||
438 | if (pid == -1) | |
439 | { | |
b9efddcd | 440 | warning (_("Child process unexpectedly missing: %s"), |
771b4502 UW |
441 | safe_strerror (save_errno)); |
442 | ||
443 | /* Claim it exited with unknown signal. */ | |
444 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
445 | ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN; | |
446 | return minus_one_ptid; | |
447 | } | |
448 | ||
449 | store_waitstatus (ourstatus, status); | |
450 | return pid_to_ptid (pid); | |
451 | } | |
452 | ||
453 | /* Override the fetch_inferior_register routine. */ | |
454 | static void | |
56be3814 | 455 | spu_fetch_inferior_registers (struct regcache *regcache, int regno) |
771b4502 UW |
456 | { |
457 | int fd; | |
4179a487 | 458 | ULONGEST addr; |
771b4502 UW |
459 | |
460 | /* We must be stopped on a spu_run system call. */ | |
461 | if (!parse_spufs_run (&fd, &addr)) | |
462 | return; | |
463 | ||
464 | /* The ID register holds the spufs file handle. */ | |
465 | if (regno == -1 || regno == SPU_ID_REGNUM) | |
466 | { | |
467 | char buf[4]; | |
468 | store_unsigned_integer (buf, 4, fd); | |
56be3814 | 469 | regcache_raw_supply (regcache, SPU_ID_REGNUM, buf); |
771b4502 UW |
470 | } |
471 | ||
472 | /* The NPC register is found at ADDR. */ | |
473 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
474 | { | |
475 | gdb_byte buf[4]; | |
476 | if (fetch_ppc_memory (addr, buf, 4) == 0) | |
56be3814 | 477 | regcache_raw_supply (regcache, SPU_PC_REGNUM, buf); |
771b4502 UW |
478 | } |
479 | ||
480 | /* The GPRs are found in the "regs" spufs file. */ | |
481 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS)) | |
482 | { | |
483 | gdb_byte buf[16 * SPU_NUM_GPRS]; | |
484 | char annex[32]; | |
485 | int i; | |
486 | ||
487 | xsnprintf (annex, sizeof annex, "%d/regs", fd); | |
488 | if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf) | |
489 | for (i = 0; i < SPU_NUM_GPRS; i++) | |
56be3814 | 490 | regcache_raw_supply (regcache, i, buf + i*16); |
771b4502 UW |
491 | } |
492 | } | |
493 | ||
494 | /* Override the store_inferior_register routine. */ | |
495 | static void | |
56be3814 | 496 | spu_store_inferior_registers (struct regcache *regcache, int regno) |
771b4502 UW |
497 | { |
498 | int fd; | |
4179a487 | 499 | ULONGEST addr; |
771b4502 UW |
500 | |
501 | /* We must be stopped on a spu_run system call. */ | |
502 | if (!parse_spufs_run (&fd, &addr)) | |
503 | return; | |
504 | ||
505 | /* The NPC register is found at ADDR. */ | |
506 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
507 | { | |
508 | gdb_byte buf[4]; | |
56be3814 | 509 | regcache_raw_collect (regcache, SPU_PC_REGNUM, buf); |
771b4502 UW |
510 | store_ppc_memory (addr, buf, 4); |
511 | } | |
512 | ||
513 | /* The GPRs are found in the "regs" spufs file. */ | |
514 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS)) | |
515 | { | |
516 | gdb_byte buf[16 * SPU_NUM_GPRS]; | |
517 | char annex[32]; | |
518 | int i; | |
519 | ||
520 | for (i = 0; i < SPU_NUM_GPRS; i++) | |
56be3814 | 521 | regcache_raw_collect (regcache, i, buf + i*16); |
771b4502 UW |
522 | |
523 | xsnprintf (annex, sizeof annex, "%d/regs", fd); | |
524 | spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf); | |
525 | } | |
526 | } | |
527 | ||
528 | /* Override the to_xfer_partial routine. */ | |
529 | static LONGEST | |
530 | spu_xfer_partial (struct target_ops *ops, | |
531 | enum target_object object, const char *annex, | |
532 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
533 | ULONGEST offset, LONGEST len) | |
534 | { | |
23d964e7 UW |
535 | if (object == TARGET_OBJECT_SPU) |
536 | return spu_proc_xfer_spu (annex, readbuf, writebuf, offset, len); | |
537 | ||
771b4502 UW |
538 | if (object == TARGET_OBJECT_MEMORY) |
539 | { | |
540 | int fd; | |
4179a487 | 541 | ULONGEST addr; |
771b4502 UW |
542 | char mem_annex[32]; |
543 | ||
544 | /* We must be stopped on a spu_run system call. */ | |
545 | if (!parse_spufs_run (&fd, &addr)) | |
546 | return 0; | |
547 | ||
548 | /* Use the "mem" spufs file to access SPU local store. */ | |
549 | xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd); | |
550 | return spu_proc_xfer_spu (mem_annex, readbuf, writebuf, offset, len); | |
551 | } | |
552 | ||
9dea8ca2 | 553 | return -1; |
771b4502 UW |
554 | } |
555 | ||
556 | /* Override the to_can_use_hw_breakpoint routine. */ | |
557 | static int | |
558 | spu_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
559 | { | |
560 | return 0; | |
561 | } | |
562 | ||
563 | ||
564 | /* Initialize SPU native target. */ | |
565 | void | |
566 | _initialize_spu_nat (void) | |
567 | { | |
568 | /* Generic ptrace methods. */ | |
569 | struct target_ops *t; | |
570 | t = inf_ptrace_target (); | |
571 | ||
572 | /* Add SPU methods. */ | |
573 | t->to_post_attach = spu_child_post_attach; | |
574 | t->to_post_startup_inferior = spu_child_post_startup_inferior; | |
575 | t->to_wait = spu_child_wait; | |
576 | t->to_fetch_registers = spu_fetch_inferior_registers; | |
577 | t->to_store_registers = spu_store_inferior_registers; | |
578 | t->to_xfer_partial = spu_xfer_partial; | |
579 | t->to_can_use_hw_breakpoint = spu_can_use_hw_breakpoint; | |
580 | ||
581 | /* Register SPU target. */ | |
582 | add_target (t); | |
583 | } | |
584 |