Commit | Line | Data |
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771b4502 | 1 | /* SPU native-dependent code for GDB, the GNU debugger. |
28e7fd62 | 2 | Copyright (C) 2006-2013 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" | |
dab06dbe | 26 | #include "inf-child.h" |
771b4502 UW |
27 | #include "inf-ptrace.h" |
28 | #include "regcache.h" | |
29 | #include "symfile.h" | |
30 | #include "gdb_wait.h" | |
d5b25491 | 31 | #include "gdbthread.h" |
92107356 | 32 | #include "gdb_bfd.h" |
771b4502 UW |
33 | |
34 | #include <sys/ptrace.h> | |
35 | #include <asm/ptrace.h> | |
36 | #include <sys/types.h> | |
37 | #include <sys/param.h> | |
38 | ||
39 | #include "spu-tdep.h" | |
40 | ||
41 | /* PPU side system calls. */ | |
42 | #define INSTR_SC 0x44000002 | |
43 | #define NR_spu_run 0x0116 | |
44 | ||
45 | ||
46 | /* Fetch PPU register REGNO. */ | |
4179a487 | 47 | static ULONGEST |
771b4502 UW |
48 | fetch_ppc_register (int regno) |
49 | { | |
50 | PTRACE_TYPE_RET res; | |
51 | ||
52 | int tid = TIDGET (inferior_ptid); | |
53 | if (tid == 0) | |
54 | tid = PIDGET (inferior_ptid); | |
55 | ||
56 | #ifndef __powerpc64__ | |
57 | /* If running as a 32-bit process on a 64-bit system, we attempt | |
58 | to get the full 64-bit register content of the target process. | |
59 | If the PPC special ptrace call fails, we're on a 32-bit system; | |
60 | just fall through to the regular ptrace call in that case. */ | |
61 | { | |
62 | gdb_byte buf[8]; | |
63 | ||
64 | errno = 0; | |
65 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
66 | (PTRACE_TYPE_ARG3) (regno * 8), buf); | |
67 | if (errno == 0) | |
68 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
69 | (PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4); | |
70 | if (errno == 0) | |
b9efddcd | 71 | return (ULONGEST) *(uint64_t *)buf; |
771b4502 UW |
72 | } |
73 | #endif | |
74 | ||
75 | errno = 0; | |
76 | res = ptrace (PT_READ_U, tid, | |
77 | (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0); | |
78 | if (errno != 0) | |
79 | { | |
80 | char mess[128]; | |
81 | xsnprintf (mess, sizeof mess, "reading PPC register #%d", regno); | |
82 | perror_with_name (_(mess)); | |
83 | } | |
84 | ||
4179a487 | 85 | return (ULONGEST) (unsigned long) res; |
771b4502 UW |
86 | } |
87 | ||
88 | /* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */ | |
89 | static int | |
4179a487 | 90 | fetch_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET *word) |
771b4502 UW |
91 | { |
92 | errno = 0; | |
93 | ||
94 | #ifndef __powerpc64__ | |
95 | if (memaddr >> 32) | |
96 | { | |
b9efddcd | 97 | uint64_t addr_8 = (uint64_t) memaddr; |
771b4502 UW |
98 | ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); |
99 | } | |
100 | else | |
101 | #endif | |
102 | *word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0); | |
103 | ||
104 | return errno; | |
105 | } | |
106 | ||
107 | /* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */ | |
108 | static int | |
4179a487 | 109 | store_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET word) |
771b4502 UW |
110 | { |
111 | errno = 0; | |
112 | ||
113 | #ifndef __powerpc64__ | |
114 | if (memaddr >> 32) | |
115 | { | |
b9efddcd | 116 | uint64_t addr_8 = (uint64_t) memaddr; |
771b4502 UW |
117 | ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); |
118 | } | |
119 | else | |
120 | #endif | |
121 | ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word); | |
122 | ||
123 | return errno; | |
124 | } | |
125 | ||
126 | /* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */ | |
127 | static int | |
4179a487 | 128 | fetch_ppc_memory (ULONGEST memaddr, gdb_byte *myaddr, int len) |
771b4502 UW |
129 | { |
130 | int i, ret; | |
131 | ||
4179a487 | 132 | ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET); |
771b4502 UW |
133 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) |
134 | / sizeof (PTRACE_TYPE_RET)); | |
135 | PTRACE_TYPE_RET *buffer; | |
136 | ||
137 | int tid = TIDGET (inferior_ptid); | |
138 | if (tid == 0) | |
139 | tid = PIDGET (inferior_ptid); | |
140 | ||
141 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
142 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
143 | { |
144 | ret = fetch_ppc_memory_1 (tid, addr, &buffer[i]); | |
145 | if (ret) | |
146 | return ret; | |
147 | } | |
771b4502 UW |
148 | |
149 | memcpy (myaddr, | |
150 | (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
151 | len); | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | /* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */ | |
157 | static int | |
4179a487 | 158 | store_ppc_memory (ULONGEST memaddr, const gdb_byte *myaddr, int len) |
771b4502 UW |
159 | { |
160 | int i, ret; | |
161 | ||
4179a487 | 162 | ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET); |
771b4502 UW |
163 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) |
164 | / sizeof (PTRACE_TYPE_RET)); | |
165 | PTRACE_TYPE_RET *buffer; | |
166 | ||
167 | int tid = TIDGET (inferior_ptid); | |
168 | if (tid == 0) | |
169 | tid = PIDGET (inferior_ptid); | |
170 | ||
171 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
172 | ||
173 | if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
174 | { |
175 | ret = fetch_ppc_memory_1 (tid, addr, &buffer[0]); | |
176 | if (ret) | |
177 | return ret; | |
178 | } | |
771b4502 UW |
179 | |
180 | if (count > 1) | |
b9efddcd UW |
181 | { |
182 | ret = fetch_ppc_memory_1 (tid, addr + (count - 1) | |
771b4502 | 183 | * sizeof (PTRACE_TYPE_RET), |
b9efddcd UW |
184 | &buffer[count - 1]); |
185 | if (ret) | |
186 | return ret; | |
187 | } | |
771b4502 UW |
188 | |
189 | memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
190 | myaddr, len); | |
191 | ||
192 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
193 | { |
194 | ret = store_ppc_memory_1 (tid, addr, buffer[i]); | |
195 | if (ret) | |
196 | return ret; | |
197 | } | |
771b4502 UW |
198 | |
199 | return 0; | |
200 | } | |
201 | ||
202 | ||
203 | /* If the PPU thread is currently stopped on a spu_run system call, | |
204 | return to FD and ADDR the file handle and NPC parameter address | |
205 | used with the system call. Return non-zero if successful. */ | |
206 | static int | |
4179a487 | 207 | parse_spufs_run (int *fd, ULONGEST *addr) |
771b4502 | 208 | { |
f5656ead | 209 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
771b4502 | 210 | gdb_byte buf[4]; |
4179a487 | 211 | ULONGEST pc = fetch_ppc_register (32); /* nip */ |
771b4502 UW |
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. */ | |
e17a4113 | 217 | if (extract_unsigned_integer (buf, 4, byte_order) != INSTR_SC) |
771b4502 UW |
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 LONGEST | |
233 | spu_proc_xfer_spu (const char *annex, gdb_byte *readbuf, | |
234 | const gdb_byte *writebuf, | |
235 | ULONGEST offset, LONGEST len) | |
236 | { | |
237 | char buf[128]; | |
238 | int fd = 0; | |
239 | int ret = -1; | |
240 | int pid = PIDGET (inferior_ptid); | |
241 | ||
242 | if (!annex) | |
243 | return 0; | |
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 -1; | |
249 | ||
250 | if (offset != 0 | |
251 | && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) | |
252 | { | |
253 | close (fd); | |
374c1d38 | 254 | return 0; |
771b4502 UW |
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 | return ret; | |
264 | } | |
265 | ||
266 | ||
267 | /* Inferior memory should contain an SPE executable image at location ADDR. | |
268 | Allocate a BFD representing that executable. Return NULL on error. */ | |
269 | ||
270 | static void * | |
271 | spu_bfd_iovec_open (struct bfd *nbfd, void *open_closure) | |
272 | { | |
273 | return open_closure; | |
274 | } | |
275 | ||
276 | static int | |
277 | spu_bfd_iovec_close (struct bfd *nbfd, void *stream) | |
278 | { | |
279 | xfree (stream); | |
39ed5604 JK |
280 | |
281 | /* Zero means success. */ | |
282 | return 0; | |
771b4502 UW |
283 | } |
284 | ||
285 | static file_ptr | |
286 | spu_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
287 | file_ptr nbytes, file_ptr offset) | |
288 | { | |
4179a487 | 289 | ULONGEST addr = *(ULONGEST *)stream; |
771b4502 UW |
290 | |
291 | if (fetch_ppc_memory (addr + offset, buf, nbytes) != 0) | |
292 | { | |
293 | bfd_set_error (bfd_error_invalid_operation); | |
294 | return -1; | |
295 | } | |
296 | ||
297 | return nbytes; | |
298 | } | |
299 | ||
f6cf9273 AM |
300 | static int |
301 | spu_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
302 | { | |
303 | /* We don't have an easy way of finding the size of embedded spu | |
304 | images. We could parse the in-memory ELF header and section | |
305 | table to find the extent of the last section but that seems | |
306 | pointless when the size is needed only for checks of other | |
307 | parsed values in dbxread.c. */ | |
308 | sb->st_size = INT_MAX; | |
309 | return 0; | |
310 | } | |
311 | ||
771b4502 | 312 | static bfd * |
4179a487 | 313 | spu_bfd_open (ULONGEST addr) |
771b4502 UW |
314 | { |
315 | struct bfd *nbfd; | |
9592c5d0 | 316 | asection *spu_name; |
771b4502 | 317 | |
4179a487 | 318 | ULONGEST *open_closure = xmalloc (sizeof (ULONGEST)); |
771b4502 UW |
319 | *open_closure = addr; |
320 | ||
64c31149 TT |
321 | nbfd = gdb_bfd_openr_iovec ("<in-memory>", "elf32-spu", |
322 | spu_bfd_iovec_open, open_closure, | |
323 | spu_bfd_iovec_pread, spu_bfd_iovec_close, | |
324 | spu_bfd_iovec_stat); | |
771b4502 UW |
325 | if (!nbfd) |
326 | return NULL; | |
327 | ||
328 | if (!bfd_check_format (nbfd, bfd_object)) | |
329 | { | |
cbb099e8 | 330 | gdb_bfd_unref (nbfd); |
771b4502 UW |
331 | return NULL; |
332 | } | |
333 | ||
9592c5d0 UW |
334 | /* Retrieve SPU name note and update BFD name. */ |
335 | spu_name = bfd_get_section_by_name (nbfd, ".note.spu_name"); | |
336 | if (spu_name) | |
337 | { | |
338 | int sect_size = bfd_section_size (nbfd, spu_name); | |
339 | if (sect_size > 20) | |
340 | { | |
341 | char *buf = alloca (sect_size - 20 + 1); | |
342 | bfd_get_section_contents (nbfd, spu_name, buf, 20, sect_size - 20); | |
343 | buf[sect_size - 20] = '\0'; | |
344 | ||
345 | xfree ((char *)nbfd->filename); | |
346 | nbfd->filename = xstrdup (buf); | |
347 | } | |
348 | } | |
349 | ||
771b4502 UW |
350 | return nbfd; |
351 | } | |
352 | ||
353 | /* INFERIOR_FD is a file handle passed by the inferior to the | |
354 | spu_run system call. Assuming the SPE context was allocated | |
355 | by the libspe library, try to retrieve the main SPE executable | |
356 | file from its copy within the target process. */ | |
357 | static void | |
358 | spu_symbol_file_add_from_memory (int inferior_fd) | |
359 | { | |
4179a487 | 360 | ULONGEST addr; |
771b4502 UW |
361 | struct bfd *nbfd; |
362 | ||
363 | char id[128]; | |
364 | char annex[32]; | |
365 | int len; | |
366 | ||
367 | /* Read object ID. */ | |
368 | xsnprintf (annex, sizeof annex, "%d/object-id", inferior_fd); | |
369 | len = spu_proc_xfer_spu (annex, id, NULL, 0, sizeof id); | |
370 | if (len <= 0 || len >= sizeof id) | |
371 | return; | |
372 | id[len] = 0; | |
b9efddcd UW |
373 | addr = strtoulst (id, NULL, 16); |
374 | if (!addr) | |
771b4502 UW |
375 | return; |
376 | ||
377 | /* Open BFD representing SPE executable and read its symbols. */ | |
378 | nbfd = spu_bfd_open (addr); | |
379 | if (nbfd) | |
8ac244b4 TT |
380 | { |
381 | struct cleanup *cleanup = make_cleanup_bfd_unref (nbfd); | |
382 | ||
383 | symbol_file_add_from_bfd (nbfd, SYMFILE_VERBOSE | SYMFILE_MAINLINE, | |
384 | NULL, 0, NULL); | |
385 | do_cleanups (cleanup); | |
386 | } | |
771b4502 UW |
387 | } |
388 | ||
389 | ||
390 | /* Override the post_startup_inferior routine to continue running | |
391 | the inferior until the first spu_run system call. */ | |
392 | static void | |
393 | spu_child_post_startup_inferior (ptid_t ptid) | |
394 | { | |
395 | int fd; | |
4179a487 | 396 | ULONGEST addr; |
771b4502 UW |
397 | |
398 | int tid = TIDGET (ptid); | |
399 | if (tid == 0) | |
400 | tid = PIDGET (ptid); | |
401 | ||
402 | while (!parse_spufs_run (&fd, &addr)) | |
403 | { | |
404 | ptrace (PT_SYSCALL, tid, (PTRACE_TYPE_ARG3) 0, 0); | |
405 | waitpid (tid, NULL, __WALL | __WNOTHREAD); | |
406 | } | |
407 | } | |
408 | ||
409 | /* Override the post_attach routine to try load the SPE executable | |
410 | file image from its copy inside the target process. */ | |
411 | static void | |
412 | spu_child_post_attach (int pid) | |
413 | { | |
414 | int fd; | |
4179a487 | 415 | ULONGEST addr; |
771b4502 UW |
416 | |
417 | /* Like child_post_startup_inferior, if we happened to attach to | |
418 | the inferior while it wasn't currently in spu_run, continue | |
419 | running it until we get back there. */ | |
420 | while (!parse_spufs_run (&fd, &addr)) | |
421 | { | |
422 | ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0); | |
423 | waitpid (pid, NULL, __WALL | __WNOTHREAD); | |
424 | } | |
425 | ||
426 | /* If the user has not provided an executable file, try to extract | |
427 | the image from inside the target process. */ | |
428 | if (!get_exec_file (0)) | |
429 | spu_symbol_file_add_from_memory (fd); | |
430 | } | |
431 | ||
432 | /* Wait for child PTID to do something. Return id of the child, | |
433 | minus_one_ptid in case of error; store status into *OURSTATUS. */ | |
434 | static ptid_t | |
117de6a9 | 435 | spu_child_wait (struct target_ops *ops, |
47608cb1 | 436 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
771b4502 UW |
437 | { |
438 | int save_errno; | |
439 | int status; | |
440 | pid_t pid; | |
441 | ||
442 | do | |
443 | { | |
444 | set_sigint_trap (); /* Causes SIGINT to be passed on to the | |
445 | attached process. */ | |
771b4502 UW |
446 | |
447 | pid = waitpid (PIDGET (ptid), &status, 0); | |
448 | if (pid == -1 && errno == ECHILD) | |
449 | /* Try again with __WCLONE to check cloned processes. */ | |
450 | pid = waitpid (PIDGET (ptid), &status, __WCLONE); | |
451 | ||
452 | save_errno = errno; | |
453 | ||
454 | /* Make sure we don't report an event for the exit of the | |
455 | original program, if we've detached from it. */ | |
456 | if (pid != -1 && !WIFSTOPPED (status) && pid != PIDGET (inferior_ptid)) | |
457 | { | |
458 | pid = -1; | |
459 | save_errno = EINTR; | |
460 | } | |
461 | ||
771b4502 UW |
462 | clear_sigint_trap (); |
463 | } | |
464 | while (pid == -1 && save_errno == EINTR); | |
465 | ||
466 | if (pid == -1) | |
467 | { | |
b9efddcd | 468 | warning (_("Child process unexpectedly missing: %s"), |
771b4502 UW |
469 | safe_strerror (save_errno)); |
470 | ||
471 | /* Claim it exited with unknown signal. */ | |
472 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
a493e3e2 | 473 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
fb66883a | 474 | return inferior_ptid; |
771b4502 UW |
475 | } |
476 | ||
477 | store_waitstatus (ourstatus, status); | |
478 | return pid_to_ptid (pid); | |
479 | } | |
480 | ||
481 | /* Override the fetch_inferior_register routine. */ | |
482 | static void | |
28439f5e PA |
483 | spu_fetch_inferior_registers (struct target_ops *ops, |
484 | struct regcache *regcache, int regno) | |
771b4502 UW |
485 | { |
486 | int fd; | |
4179a487 | 487 | ULONGEST addr; |
771b4502 UW |
488 | |
489 | /* We must be stopped on a spu_run system call. */ | |
490 | if (!parse_spufs_run (&fd, &addr)) | |
491 | return; | |
492 | ||
493 | /* The ID register holds the spufs file handle. */ | |
494 | if (regno == -1 || regno == SPU_ID_REGNUM) | |
495 | { | |
e17a4113 UW |
496 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
497 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
e362b510 | 498 | gdb_byte buf[4]; |
e17a4113 | 499 | store_unsigned_integer (buf, 4, byte_order, fd); |
56be3814 | 500 | regcache_raw_supply (regcache, SPU_ID_REGNUM, buf); |
771b4502 UW |
501 | } |
502 | ||
503 | /* The NPC register is found at ADDR. */ | |
504 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
505 | { | |
506 | gdb_byte buf[4]; | |
507 | if (fetch_ppc_memory (addr, buf, 4) == 0) | |
56be3814 | 508 | regcache_raw_supply (regcache, SPU_PC_REGNUM, buf); |
771b4502 UW |
509 | } |
510 | ||
511 | /* The GPRs are found in the "regs" spufs file. */ | |
512 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS)) | |
513 | { | |
514 | gdb_byte buf[16 * SPU_NUM_GPRS]; | |
515 | char annex[32]; | |
516 | int i; | |
517 | ||
518 | xsnprintf (annex, sizeof annex, "%d/regs", fd); | |
519 | if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf) | |
520 | for (i = 0; i < SPU_NUM_GPRS; i++) | |
56be3814 | 521 | regcache_raw_supply (regcache, i, buf + i*16); |
771b4502 UW |
522 | } |
523 | } | |
524 | ||
525 | /* Override the store_inferior_register routine. */ | |
526 | static void | |
28439f5e PA |
527 | spu_store_inferior_registers (struct target_ops *ops, |
528 | struct regcache *regcache, int regno) | |
771b4502 UW |
529 | { |
530 | int fd; | |
4179a487 | 531 | ULONGEST addr; |
771b4502 UW |
532 | |
533 | /* We must be stopped on a spu_run system call. */ | |
534 | if (!parse_spufs_run (&fd, &addr)) | |
535 | return; | |
536 | ||
537 | /* The NPC register is found at ADDR. */ | |
538 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
539 | { | |
540 | gdb_byte buf[4]; | |
56be3814 | 541 | regcache_raw_collect (regcache, SPU_PC_REGNUM, buf); |
771b4502 UW |
542 | store_ppc_memory (addr, buf, 4); |
543 | } | |
544 | ||
545 | /* The GPRs are found in the "regs" spufs file. */ | |
546 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS)) | |
547 | { | |
548 | gdb_byte buf[16 * SPU_NUM_GPRS]; | |
549 | char annex[32]; | |
550 | int i; | |
551 | ||
552 | for (i = 0; i < SPU_NUM_GPRS; i++) | |
56be3814 | 553 | regcache_raw_collect (regcache, i, buf + i*16); |
771b4502 UW |
554 | |
555 | xsnprintf (annex, sizeof annex, "%d/regs", fd); | |
556 | spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf); | |
557 | } | |
558 | } | |
559 | ||
560 | /* Override the to_xfer_partial routine. */ | |
561 | static LONGEST | |
562 | spu_xfer_partial (struct target_ops *ops, | |
563 | enum target_object object, const char *annex, | |
564 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
565 | ULONGEST offset, LONGEST len) | |
566 | { | |
23d964e7 UW |
567 | if (object == TARGET_OBJECT_SPU) |
568 | return spu_proc_xfer_spu (annex, readbuf, writebuf, offset, len); | |
569 | ||
771b4502 UW |
570 | if (object == TARGET_OBJECT_MEMORY) |
571 | { | |
572 | int fd; | |
4179a487 | 573 | ULONGEST addr; |
d2ed6730 UW |
574 | char mem_annex[32], lslr_annex[32]; |
575 | gdb_byte buf[32]; | |
576 | ULONGEST lslr; | |
577 | LONGEST ret; | |
771b4502 UW |
578 | |
579 | /* We must be stopped on a spu_run system call. */ | |
580 | if (!parse_spufs_run (&fd, &addr)) | |
581 | return 0; | |
582 | ||
583 | /* Use the "mem" spufs file to access SPU local store. */ | |
584 | xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd); | |
d2ed6730 UW |
585 | ret = spu_proc_xfer_spu (mem_annex, readbuf, writebuf, offset, len); |
586 | if (ret > 0) | |
587 | return ret; | |
588 | ||
589 | /* SPU local store access wraps the address around at the | |
590 | local store limit. We emulate this here. To avoid needing | |
591 | an extra access to retrieve the LSLR, we only do that after | |
592 | trying the original address first, and getting end-of-file. */ | |
593 | xsnprintf (lslr_annex, sizeof lslr_annex, "%d/lslr", fd); | |
594 | memset (buf, 0, sizeof buf); | |
595 | if (spu_proc_xfer_spu (lslr_annex, buf, NULL, 0, sizeof buf) <= 0) | |
596 | return ret; | |
597 | ||
598 | lslr = strtoulst (buf, NULL, 16); | |
599 | return spu_proc_xfer_spu (mem_annex, readbuf, writebuf, | |
600 | offset & lslr, len); | |
771b4502 UW |
601 | } |
602 | ||
9dea8ca2 | 603 | return -1; |
771b4502 UW |
604 | } |
605 | ||
606 | /* Override the to_can_use_hw_breakpoint routine. */ | |
607 | static int | |
608 | spu_can_use_hw_breakpoint (int type, int cnt, int othertype) | |
609 | { | |
610 | return 0; | |
611 | } | |
612 | ||
613 | ||
614 | /* Initialize SPU native target. */ | |
615 | void | |
616 | _initialize_spu_nat (void) | |
617 | { | |
618 | /* Generic ptrace methods. */ | |
619 | struct target_ops *t; | |
620 | t = inf_ptrace_target (); | |
621 | ||
622 | /* Add SPU methods. */ | |
623 | t->to_post_attach = spu_child_post_attach; | |
624 | t->to_post_startup_inferior = spu_child_post_startup_inferior; | |
625 | t->to_wait = spu_child_wait; | |
626 | t->to_fetch_registers = spu_fetch_inferior_registers; | |
627 | t->to_store_registers = spu_store_inferior_registers; | |
628 | t->to_xfer_partial = spu_xfer_partial; | |
629 | t->to_can_use_hw_breakpoint = spu_can_use_hw_breakpoint; | |
630 | ||
631 | /* Register SPU target. */ | |
632 | add_target (t); | |
633 | } |