Commit | Line | Data |
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771b4502 | 1 | /* SPU native-dependent code for GDB, the GNU debugger. |
32d0add0 | 2 | Copyright (C) 2006-2015 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" | |
771b4502 UW |
23 | #include "target.h" |
24 | #include "inferior.h" | |
dab06dbe | 25 | #include "inf-child.h" |
771b4502 UW |
26 | #include "inf-ptrace.h" |
27 | #include "regcache.h" | |
28 | #include "symfile.h" | |
29 | #include "gdb_wait.h" | |
d5b25491 | 30 | #include "gdbthread.h" |
92107356 | 31 | #include "gdb_bfd.h" |
771b4502 UW |
32 | |
33 | #include <sys/ptrace.h> | |
34 | #include <asm/ptrace.h> | |
35 | #include <sys/types.h> | |
771b4502 UW |
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. */ | |
4179a487 | 45 | static ULONGEST |
771b4502 UW |
46 | fetch_ppc_register (int regno) |
47 | { | |
48 | PTRACE_TYPE_RET res; | |
49 | ||
dfd4cc63 | 50 | int tid = ptid_get_lwp (inferior_ptid); |
771b4502 | 51 | if (tid == 0) |
dfd4cc63 | 52 | tid = ptid_get_pid (inferior_ptid); |
771b4502 UW |
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) | |
b9efddcd | 69 | return (ULONGEST) *(uint64_t *)buf; |
771b4502 UW |
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 | ||
4179a487 | 83 | return (ULONGEST) (unsigned long) res; |
771b4502 UW |
84 | } |
85 | ||
86 | /* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */ | |
87 | static int | |
4179a487 | 88 | fetch_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET *word) |
771b4502 UW |
89 | { |
90 | errno = 0; | |
91 | ||
92 | #ifndef __powerpc64__ | |
93 | if (memaddr >> 32) | |
94 | { | |
b9efddcd | 95 | uint64_t addr_8 = (uint64_t) memaddr; |
771b4502 UW |
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 | |
4179a487 | 107 | store_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET word) |
771b4502 UW |
108 | { |
109 | errno = 0; | |
110 | ||
111 | #ifndef __powerpc64__ | |
112 | if (memaddr >> 32) | |
113 | { | |
b9efddcd | 114 | uint64_t addr_8 = (uint64_t) memaddr; |
771b4502 UW |
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 | |
4179a487 | 126 | fetch_ppc_memory (ULONGEST memaddr, gdb_byte *myaddr, int len) |
771b4502 UW |
127 | { |
128 | int i, ret; | |
129 | ||
4179a487 | 130 | ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET); |
771b4502 UW |
131 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) |
132 | / sizeof (PTRACE_TYPE_RET)); | |
133 | PTRACE_TYPE_RET *buffer; | |
134 | ||
dfd4cc63 | 135 | int tid = ptid_get_lwp (inferior_ptid); |
771b4502 | 136 | if (tid == 0) |
dfd4cc63 | 137 | tid = ptid_get_pid (inferior_ptid); |
771b4502 UW |
138 | |
139 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
140 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
141 | { |
142 | ret = fetch_ppc_memory_1 (tid, addr, &buffer[i]); | |
143 | if (ret) | |
144 | return ret; | |
145 | } | |
771b4502 UW |
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 | |
4179a487 | 156 | store_ppc_memory (ULONGEST memaddr, const gdb_byte *myaddr, int len) |
771b4502 UW |
157 | { |
158 | int i, ret; | |
159 | ||
4179a487 | 160 | ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET); |
771b4502 UW |
161 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) |
162 | / sizeof (PTRACE_TYPE_RET)); | |
163 | PTRACE_TYPE_RET *buffer; | |
164 | ||
dfd4cc63 | 165 | int tid = ptid_get_lwp (inferior_ptid); |
771b4502 | 166 | if (tid == 0) |
dfd4cc63 | 167 | tid = ptid_get_pid (inferior_ptid); |
771b4502 UW |
168 | |
169 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
170 | ||
171 | if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
172 | { |
173 | ret = fetch_ppc_memory_1 (tid, addr, &buffer[0]); | |
174 | if (ret) | |
175 | return ret; | |
176 | } | |
771b4502 UW |
177 | |
178 | if (count > 1) | |
b9efddcd UW |
179 | { |
180 | ret = fetch_ppc_memory_1 (tid, addr + (count - 1) | |
771b4502 | 181 | * sizeof (PTRACE_TYPE_RET), |
b9efddcd UW |
182 | &buffer[count - 1]); |
183 | if (ret) | |
184 | return ret; | |
185 | } | |
771b4502 UW |
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)) | |
b9efddcd UW |
191 | { |
192 | ret = store_ppc_memory_1 (tid, addr, buffer[i]); | |
193 | if (ret) | |
194 | return ret; | |
195 | } | |
771b4502 UW |
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 | |
4179a487 | 205 | parse_spufs_run (int *fd, ULONGEST *addr) |
771b4502 | 206 | { |
f5656ead | 207 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
771b4502 | 208 | gdb_byte buf[4]; |
4179a487 | 209 | ULONGEST pc = fetch_ppc_register (32); /* nip */ |
771b4502 UW |
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. */ | |
e17a4113 | 215 | if (extract_unsigned_integer (buf, 4, byte_order) != INSTR_SC) |
771b4502 UW |
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 | ||
edcc890f YQ |
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, | |
771b4502 | 230 | using the /proc file system. */ |
edcc890f | 231 | |
9b409511 | 232 | static enum target_xfer_status |
771b4502 UW |
233 | spu_proc_xfer_spu (const char *annex, gdb_byte *readbuf, |
234 | const gdb_byte *writebuf, | |
9b409511 | 235 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
771b4502 UW |
236 | { |
237 | char buf[128]; | |
238 | int fd = 0; | |
239 | int ret = -1; | |
dfd4cc63 | 240 | int pid = ptid_get_pid (inferior_ptid); |
771b4502 UW |
241 | |
242 | if (!annex) | |
9b409511 | 243 | return TARGET_XFER_EOF; |
771b4502 UW |
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) | |
2ed4b548 | 248 | return TARGET_XFER_E_IO; |
771b4502 UW |
249 | |
250 | if (offset != 0 | |
251 | && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) | |
252 | { | |
253 | close (fd); | |
9b409511 | 254 | return TARGET_XFER_EOF; |
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); | |
9b409511 YQ |
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 | } | |
771b4502 UW |
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); | |
39ed5604 JK |
288 | |
289 | /* Zero means success. */ | |
290 | return 0; | |
771b4502 UW |
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 | { | |
4179a487 | 297 | ULONGEST addr = *(ULONGEST *)stream; |
771b4502 UW |
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 | ||
f6cf9273 AM |
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 | ||
771b4502 | 320 | static bfd * |
4179a487 | 321 | spu_bfd_open (ULONGEST addr) |
771b4502 UW |
322 | { |
323 | struct bfd *nbfd; | |
9592c5d0 | 324 | asection *spu_name; |
771b4502 | 325 | |
4179a487 | 326 | ULONGEST *open_closure = xmalloc (sizeof (ULONGEST)); |
771b4502 UW |
327 | *open_closure = addr; |
328 | ||
64c31149 TT |
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); | |
771b4502 UW |
333 | if (!nbfd) |
334 | return NULL; | |
335 | ||
336 | if (!bfd_check_format (nbfd, bfd_object)) | |
337 | { | |
cbb099e8 | 338 | gdb_bfd_unref (nbfd); |
771b4502 UW |
339 | return NULL; |
340 | } | |
341 | ||
9592c5d0 UW |
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 | ||
771b4502 UW |
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 | { | |
4179a487 | 368 | ULONGEST addr; |
771b4502 UW |
369 | struct bfd *nbfd; |
370 | ||
22c90ac1 | 371 | gdb_byte id[128]; |
771b4502 | 372 | char annex[32]; |
9b409511 YQ |
373 | ULONGEST len; |
374 | enum target_xfer_status status; | |
771b4502 UW |
375 | |
376 | /* Read object ID. */ | |
377 | xsnprintf (annex, sizeof annex, "%d/object-id", inferior_fd); | |
9b409511 YQ |
378 | status = spu_proc_xfer_spu (annex, id, NULL, 0, sizeof id, &len); |
379 | if (status != TARGET_XFER_OK || len >= sizeof id) | |
771b4502 UW |
380 | return; |
381 | id[len] = 0; | |
22c90ac1 | 382 | addr = strtoulst ((const char *) id, NULL, 16); |
b9efddcd | 383 | if (!addr) |
771b4502 UW |
384 | return; |
385 | ||
386 | /* Open BFD representing SPE executable and read its symbols. */ | |
387 | nbfd = spu_bfd_open (addr); | |
388 | if (nbfd) | |
8ac244b4 TT |
389 | { |
390 | struct cleanup *cleanup = make_cleanup_bfd_unref (nbfd); | |
391 | ||
d64ad97c YQ |
392 | symbol_file_add_from_bfd (nbfd, bfd_get_filename (nbfd), |
393 | SYMFILE_VERBOSE | SYMFILE_MAINLINE, | |
8ac244b4 TT |
394 | NULL, 0, NULL); |
395 | do_cleanups (cleanup); | |
396 | } | |
771b4502 UW |
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 | |
2e97a79e | 403 | spu_child_post_startup_inferior (struct target_ops *self, ptid_t ptid) |
771b4502 UW |
404 | { |
405 | int fd; | |
4179a487 | 406 | ULONGEST addr; |
771b4502 | 407 | |
dfd4cc63 | 408 | int tid = ptid_get_lwp (ptid); |
771b4502 | 409 | if (tid == 0) |
dfd4cc63 | 410 | tid = ptid_get_pid (ptid); |
771b4502 UW |
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 | |
f045800c | 422 | spu_child_post_attach (struct target_ops *self, int pid) |
771b4502 UW |
423 | { |
424 | int fd; | |
4179a487 | 425 | ULONGEST addr; |
771b4502 UW |
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 | |
117de6a9 | 445 | spu_child_wait (struct target_ops *ops, |
47608cb1 | 446 | ptid_t ptid, struct target_waitstatus *ourstatus, int options) |
771b4502 UW |
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. */ | |
771b4502 | 456 | |
dfd4cc63 | 457 | pid = waitpid (ptid_get_pid (ptid), &status, 0); |
771b4502 UW |
458 | if (pid == -1 && errno == ECHILD) |
459 | /* Try again with __WCLONE to check cloned processes. */ | |
dfd4cc63 | 460 | pid = waitpid (ptid_get_pid (ptid), &status, __WCLONE); |
771b4502 UW |
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. */ | |
dfd4cc63 LM |
466 | if (pid != -1 && !WIFSTOPPED (status) |
467 | && pid != ptid_get_pid (inferior_ptid)) | |
771b4502 UW |
468 | { |
469 | pid = -1; | |
470 | save_errno = EINTR; | |
471 | } | |
472 | ||
771b4502 UW |
473 | clear_sigint_trap (); |
474 | } | |
475 | while (pid == -1 && save_errno == EINTR); | |
476 | ||
477 | if (pid == -1) | |
478 | { | |
b9efddcd | 479 | warning (_("Child process unexpectedly missing: %s"), |
771b4502 UW |
480 | safe_strerror (save_errno)); |
481 | ||
482 | /* Claim it exited with unknown signal. */ | |
483 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
a493e3e2 | 484 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
fb66883a | 485 | return inferior_ptid; |
771b4502 UW |
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 | |
28439f5e PA |
494 | spu_fetch_inferior_registers (struct target_ops *ops, |
495 | struct regcache *regcache, int regno) | |
771b4502 UW |
496 | { |
497 | int fd; | |
4179a487 | 498 | ULONGEST addr; |
771b4502 UW |
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 | { | |
e17a4113 UW |
507 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
508 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
e362b510 | 509 | gdb_byte buf[4]; |
e17a4113 | 510 | store_unsigned_integer (buf, 4, byte_order, fd); |
56be3814 | 511 | regcache_raw_supply (regcache, SPU_ID_REGNUM, buf); |
771b4502 UW |
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) | |
56be3814 | 519 | regcache_raw_supply (regcache, SPU_PC_REGNUM, buf); |
771b4502 UW |
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; | |
9b409511 | 528 | ULONGEST len; |
771b4502 UW |
529 | |
530 | xsnprintf (annex, sizeof annex, "%d/regs", fd); | |
9b409511 YQ |
531 | if ((spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf, &len) |
532 | == TARGET_XFER_OK) | |
533 | && len == sizeof buf) | |
771b4502 | 534 | for (i = 0; i < SPU_NUM_GPRS; i++) |
56be3814 | 535 | regcache_raw_supply (regcache, i, buf + i*16); |
771b4502 UW |
536 | } |
537 | } | |
538 | ||
539 | /* Override the store_inferior_register routine. */ | |
540 | static void | |
28439f5e PA |
541 | spu_store_inferior_registers (struct target_ops *ops, |
542 | struct regcache *regcache, int regno) | |
771b4502 UW |
543 | { |
544 | int fd; | |
4179a487 | 545 | ULONGEST addr; |
771b4502 UW |
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]; | |
56be3814 | 555 | regcache_raw_collect (regcache, SPU_PC_REGNUM, buf); |
771b4502 UW |
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; | |
9b409511 | 565 | ULONGEST len; |
771b4502 UW |
566 | |
567 | for (i = 0; i < SPU_NUM_GPRS; i++) | |
56be3814 | 568 | regcache_raw_collect (regcache, i, buf + i*16); |
771b4502 UW |
569 | |
570 | xsnprintf (annex, sizeof annex, "%d/regs", fd); | |
9b409511 | 571 | spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf, &len); |
771b4502 UW |
572 | } |
573 | } | |
574 | ||
575 | /* Override the to_xfer_partial routine. */ | |
9b409511 | 576 | static enum target_xfer_status |
771b4502 UW |
577 | spu_xfer_partial (struct target_ops *ops, |
578 | enum target_object object, const char *annex, | |
579 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 580 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
771b4502 | 581 | { |
23d964e7 | 582 | if (object == TARGET_OBJECT_SPU) |
9b409511 YQ |
583 | return spu_proc_xfer_spu (annex, readbuf, writebuf, offset, len, |
584 | xfered_len); | |
23d964e7 | 585 | |
771b4502 UW |
586 | if (object == TARGET_OBJECT_MEMORY) |
587 | { | |
588 | int fd; | |
4179a487 | 589 | ULONGEST addr; |
d2ed6730 UW |
590 | char mem_annex[32], lslr_annex[32]; |
591 | gdb_byte buf[32]; | |
592 | ULONGEST lslr; | |
9b409511 | 593 | enum target_xfer_status ret; |
771b4502 UW |
594 | |
595 | /* We must be stopped on a spu_run system call. */ | |
596 | if (!parse_spufs_run (&fd, &addr)) | |
9b409511 | 597 | return TARGET_XFER_EOF; |
771b4502 UW |
598 | |
599 | /* Use the "mem" spufs file to access SPU local store. */ | |
600 | xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd); | |
9b409511 YQ |
601 | ret = spu_proc_xfer_spu (mem_annex, readbuf, writebuf, offset, len, |
602 | xfered_len); | |
603 | if (ret == TARGET_XFER_OK) | |
d2ed6730 UW |
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); | |
9b409511 YQ |
612 | if (spu_proc_xfer_spu (lslr_annex, buf, NULL, 0, sizeof buf, xfered_len) |
613 | != TARGET_XFER_OK) | |
d2ed6730 UW |
614 | return ret; |
615 | ||
22c90ac1 | 616 | lslr = strtoulst ((const char *) buf, NULL, 16); |
d2ed6730 | 617 | return spu_proc_xfer_spu (mem_annex, readbuf, writebuf, |
9b409511 | 618 | offset & lslr, len, xfered_len); |
771b4502 UW |
619 | } |
620 | ||
2ed4b548 | 621 | return TARGET_XFER_E_IO; |
771b4502 UW |
622 | } |
623 | ||
624 | /* Override the to_can_use_hw_breakpoint routine. */ | |
625 | static int | |
5461485a TT |
626 | spu_can_use_hw_breakpoint (struct target_ops *self, |
627 | int type, int cnt, int othertype) | |
771b4502 UW |
628 | { |
629 | return 0; | |
630 | } | |
631 | ||
bd1f7788 YQ |
632 | /* -Wmissing-prototypes */ |
633 | extern initialize_file_ftype _initialize_spu_nat; | |
771b4502 UW |
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 | } |