Commit | Line | Data |
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771b4502 | 1 | /* SPU native-dependent code for GDB, the GNU debugger. |
42a4f53d | 2 | Copyright (C) 2006-2019 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" | |
268a13a5 | 29 | #include "gdbsupport/gdb_wait.h" |
d5b25491 | 30 | #include "gdbthread.h" |
92107356 | 31 | #include "gdb_bfd.h" |
771b4502 | 32 | |
5826e159 | 33 | #include "nat/gdb_ptrace.h" |
771b4502 UW |
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 | ||
f6ac5f3d PA |
43 | class spu_linux_nat_target final : public inf_ptrace_target |
44 | { | |
45 | public: | |
46 | void fetch_registers (struct regcache *regcache, int regnum) override; | |
47 | void store_registers (struct regcache *regcache, int regnum) override; | |
48 | ||
49 | void post_attach (int) override; | |
50 | void post_startup_inferior (ptid_t) override; | |
51 | ||
52 | ptid_t wait (ptid_t, struct target_waitstatus *, int options) override; | |
53 | ||
54 | enum target_xfer_status xfer_partial (enum target_object object, | |
55 | const char *annex, | |
56 | gdb_byte *readbuf, | |
57 | const gdb_byte *writebuf, | |
58 | ULONGEST offset, ULONGEST len, | |
59 | ULONGEST *xfered_len) override; | |
60 | ||
61 | int can_use_hw_breakpoint (enum bptype, int, int) override; | |
62 | }; | |
63 | ||
64 | static spu_linux_nat_target the_spu_linux_nat_target; | |
771b4502 UW |
65 | |
66 | /* Fetch PPU register REGNO. */ | |
4179a487 | 67 | static ULONGEST |
771b4502 UW |
68 | fetch_ppc_register (int regno) |
69 | { | |
70 | PTRACE_TYPE_RET res; | |
71 | ||
e38504b3 | 72 | int tid = inferior_ptid.lwp (); |
771b4502 | 73 | if (tid == 0) |
e99b03dc | 74 | tid = inferior_ptid.pid (); |
771b4502 UW |
75 | |
76 | #ifndef __powerpc64__ | |
77 | /* If running as a 32-bit process on a 64-bit system, we attempt | |
78 | to get the full 64-bit register content of the target process. | |
79 | If the PPC special ptrace call fails, we're on a 32-bit system; | |
80 | just fall through to the regular ptrace call in that case. */ | |
81 | { | |
82 | gdb_byte buf[8]; | |
83 | ||
84 | errno = 0; | |
85 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
86 | (PTRACE_TYPE_ARG3) (regno * 8), buf); | |
87 | if (errno == 0) | |
88 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
89 | (PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4); | |
90 | if (errno == 0) | |
b9efddcd | 91 | return (ULONGEST) *(uint64_t *)buf; |
771b4502 UW |
92 | } |
93 | #endif | |
94 | ||
95 | errno = 0; | |
96 | res = ptrace (PT_READ_U, tid, | |
97 | (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0); | |
98 | if (errno != 0) | |
99 | { | |
100 | char mess[128]; | |
101 | xsnprintf (mess, sizeof mess, "reading PPC register #%d", regno); | |
102 | perror_with_name (_(mess)); | |
103 | } | |
104 | ||
4179a487 | 105 | return (ULONGEST) (unsigned long) res; |
771b4502 UW |
106 | } |
107 | ||
108 | /* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */ | |
109 | static int | |
4179a487 | 110 | fetch_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET *word) |
771b4502 UW |
111 | { |
112 | errno = 0; | |
113 | ||
114 | #ifndef __powerpc64__ | |
115 | if (memaddr >> 32) | |
116 | { | |
b9efddcd | 117 | uint64_t addr_8 = (uint64_t) memaddr; |
771b4502 UW |
118 | ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); |
119 | } | |
120 | else | |
121 | #endif | |
122 | *word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0); | |
123 | ||
124 | return errno; | |
125 | } | |
126 | ||
127 | /* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */ | |
128 | static int | |
4179a487 | 129 | store_ppc_memory_1 (int tid, ULONGEST memaddr, PTRACE_TYPE_RET word) |
771b4502 UW |
130 | { |
131 | errno = 0; | |
132 | ||
133 | #ifndef __powerpc64__ | |
134 | if (memaddr >> 32) | |
135 | { | |
b9efddcd | 136 | uint64_t addr_8 = (uint64_t) memaddr; |
771b4502 UW |
137 | ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); |
138 | } | |
139 | else | |
140 | #endif | |
141 | ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word); | |
142 | ||
143 | return errno; | |
144 | } | |
145 | ||
146 | /* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */ | |
147 | static int | |
4179a487 | 148 | fetch_ppc_memory (ULONGEST memaddr, gdb_byte *myaddr, int len) |
771b4502 UW |
149 | { |
150 | int i, ret; | |
151 | ||
4179a487 | 152 | ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET); |
771b4502 UW |
153 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) |
154 | / sizeof (PTRACE_TYPE_RET)); | |
155 | PTRACE_TYPE_RET *buffer; | |
156 | ||
e38504b3 | 157 | int tid = inferior_ptid.lwp (); |
771b4502 | 158 | if (tid == 0) |
e99b03dc | 159 | tid = inferior_ptid.pid (); |
771b4502 UW |
160 | |
161 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
162 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
163 | { |
164 | ret = fetch_ppc_memory_1 (tid, addr, &buffer[i]); | |
165 | if (ret) | |
166 | return ret; | |
167 | } | |
771b4502 UW |
168 | |
169 | memcpy (myaddr, | |
170 | (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
171 | len); | |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
176 | /* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */ | |
177 | static int | |
4179a487 | 178 | store_ppc_memory (ULONGEST memaddr, const gdb_byte *myaddr, int len) |
771b4502 UW |
179 | { |
180 | int i, ret; | |
181 | ||
4179a487 | 182 | ULONGEST addr = memaddr & -(ULONGEST) sizeof (PTRACE_TYPE_RET); |
771b4502 UW |
183 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) |
184 | / sizeof (PTRACE_TYPE_RET)); | |
185 | PTRACE_TYPE_RET *buffer; | |
186 | ||
e38504b3 | 187 | int tid = inferior_ptid.lwp (); |
771b4502 | 188 | if (tid == 0) |
e99b03dc | 189 | tid = inferior_ptid.pid (); |
771b4502 UW |
190 | |
191 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
192 | ||
193 | if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
194 | { |
195 | ret = fetch_ppc_memory_1 (tid, addr, &buffer[0]); | |
196 | if (ret) | |
197 | return ret; | |
198 | } | |
771b4502 UW |
199 | |
200 | if (count > 1) | |
b9efddcd UW |
201 | { |
202 | ret = fetch_ppc_memory_1 (tid, addr + (count - 1) | |
771b4502 | 203 | * sizeof (PTRACE_TYPE_RET), |
b9efddcd UW |
204 | &buffer[count - 1]); |
205 | if (ret) | |
206 | return ret; | |
207 | } | |
771b4502 UW |
208 | |
209 | memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
210 | myaddr, len); | |
211 | ||
212 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
b9efddcd UW |
213 | { |
214 | ret = store_ppc_memory_1 (tid, addr, buffer[i]); | |
215 | if (ret) | |
216 | return ret; | |
217 | } | |
771b4502 UW |
218 | |
219 | return 0; | |
220 | } | |
221 | ||
222 | ||
223 | /* If the PPU thread is currently stopped on a spu_run system call, | |
224 | return to FD and ADDR the file handle and NPC parameter address | |
225 | used with the system call. Return non-zero if successful. */ | |
226 | static int | |
4179a487 | 227 | parse_spufs_run (int *fd, ULONGEST *addr) |
771b4502 | 228 | { |
f5656ead | 229 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
771b4502 | 230 | gdb_byte buf[4]; |
4179a487 | 231 | ULONGEST pc = fetch_ppc_register (32); /* nip */ |
771b4502 UW |
232 | |
233 | /* Fetch instruction preceding current NIP. */ | |
234 | if (fetch_ppc_memory (pc-4, buf, 4) != 0) | |
235 | return 0; | |
236 | /* It should be a "sc" instruction. */ | |
e17a4113 | 237 | if (extract_unsigned_integer (buf, 4, byte_order) != INSTR_SC) |
771b4502 UW |
238 | return 0; |
239 | /* System call number should be NR_spu_run. */ | |
240 | if (fetch_ppc_register (0) != NR_spu_run) | |
241 | return 0; | |
242 | ||
243 | /* Register 3 contains fd, register 4 the NPC param pointer. */ | |
244 | *fd = fetch_ppc_register (34); /* orig_gpr3 */ | |
245 | *addr = fetch_ppc_register (4); | |
246 | return 1; | |
247 | } | |
248 | ||
249 | ||
edcc890f YQ |
250 | /* Implement the to_xfer_partial target_ops method for TARGET_OBJECT_SPU. |
251 | Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF, | |
771b4502 | 252 | using the /proc file system. */ |
edcc890f | 253 | |
9b409511 | 254 | static enum target_xfer_status |
771b4502 UW |
255 | spu_proc_xfer_spu (const char *annex, gdb_byte *readbuf, |
256 | const gdb_byte *writebuf, | |
9b409511 | 257 | ULONGEST offset, ULONGEST len, ULONGEST *xfered_len) |
771b4502 UW |
258 | { |
259 | char buf[128]; | |
260 | int fd = 0; | |
261 | int ret = -1; | |
e99b03dc | 262 | int pid = inferior_ptid.pid (); |
771b4502 UW |
263 | |
264 | if (!annex) | |
9b409511 | 265 | return TARGET_XFER_EOF; |
771b4502 UW |
266 | |
267 | xsnprintf (buf, sizeof buf, "/proc/%d/fd/%s", pid, annex); | |
268 | fd = open (buf, writebuf? O_WRONLY : O_RDONLY); | |
269 | if (fd <= 0) | |
2ed4b548 | 270 | return TARGET_XFER_E_IO; |
771b4502 UW |
271 | |
272 | if (offset != 0 | |
273 | && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) | |
274 | { | |
275 | close (fd); | |
9b409511 | 276 | return TARGET_XFER_EOF; |
771b4502 UW |
277 | } |
278 | ||
279 | if (writebuf) | |
280 | ret = write (fd, writebuf, (size_t) len); | |
281 | else if (readbuf) | |
282 | ret = read (fd, readbuf, (size_t) len); | |
283 | ||
284 | close (fd); | |
9b409511 YQ |
285 | if (ret < 0) |
286 | return TARGET_XFER_E_IO; | |
287 | else if (ret == 0) | |
288 | return TARGET_XFER_EOF; | |
289 | else | |
290 | { | |
291 | *xfered_len = (ULONGEST) ret; | |
292 | return TARGET_XFER_OK; | |
293 | } | |
771b4502 UW |
294 | } |
295 | ||
296 | ||
297 | /* Inferior memory should contain an SPE executable image at location ADDR. | |
298 | Allocate a BFD representing that executable. Return NULL on error. */ | |
299 | ||
300 | static void * | |
301 | spu_bfd_iovec_open (struct bfd *nbfd, void *open_closure) | |
302 | { | |
303 | return open_closure; | |
304 | } | |
305 | ||
306 | static int | |
307 | spu_bfd_iovec_close (struct bfd *nbfd, void *stream) | |
308 | { | |
309 | xfree (stream); | |
39ed5604 JK |
310 | |
311 | /* Zero means success. */ | |
312 | return 0; | |
771b4502 UW |
313 | } |
314 | ||
315 | static file_ptr | |
316 | spu_bfd_iovec_pread (struct bfd *abfd, void *stream, void *buf, | |
317 | file_ptr nbytes, file_ptr offset) | |
318 | { | |
4179a487 | 319 | ULONGEST addr = *(ULONGEST *)stream; |
771b4502 | 320 | |
c1aebf87 | 321 | if (fetch_ppc_memory (addr + offset, (gdb_byte *)buf, nbytes) != 0) |
771b4502 UW |
322 | { |
323 | bfd_set_error (bfd_error_invalid_operation); | |
324 | return -1; | |
325 | } | |
326 | ||
327 | return nbytes; | |
328 | } | |
329 | ||
f6cf9273 AM |
330 | static int |
331 | spu_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) | |
332 | { | |
333 | /* We don't have an easy way of finding the size of embedded spu | |
334 | images. We could parse the in-memory ELF header and section | |
335 | table to find the extent of the last section but that seems | |
336 | pointless when the size is needed only for checks of other | |
337 | parsed values in dbxread.c. */ | |
326a5c7e | 338 | memset (sb, 0, sizeof (struct stat)); |
f6cf9273 AM |
339 | sb->st_size = INT_MAX; |
340 | return 0; | |
341 | } | |
342 | ||
192b62ce | 343 | static gdb_bfd_ref_ptr |
4179a487 | 344 | spu_bfd_open (ULONGEST addr) |
771b4502 | 345 | { |
9592c5d0 | 346 | asection *spu_name; |
771b4502 | 347 | |
8d749320 | 348 | ULONGEST *open_closure = XNEW (ULONGEST); |
771b4502 UW |
349 | *open_closure = addr; |
350 | ||
192b62ce TT |
351 | gdb_bfd_ref_ptr nbfd (gdb_bfd_openr_iovec ("<in-memory>", "elf32-spu", |
352 | spu_bfd_iovec_open, open_closure, | |
353 | spu_bfd_iovec_pread, | |
354 | spu_bfd_iovec_close, | |
355 | spu_bfd_iovec_stat)); | |
356 | if (nbfd == NULL) | |
771b4502 UW |
357 | return NULL; |
358 | ||
192b62ce TT |
359 | if (!bfd_check_format (nbfd.get (), bfd_object)) |
360 | return NULL; | |
771b4502 | 361 | |
9592c5d0 | 362 | /* Retrieve SPU name note and update BFD name. */ |
192b62ce | 363 | spu_name = bfd_get_section_by_name (nbfd.get (), ".note.spu_name"); |
9592c5d0 UW |
364 | if (spu_name) |
365 | { | |
fd361982 | 366 | int sect_size = bfd_section_size (spu_name); |
9592c5d0 UW |
367 | if (sect_size > 20) |
368 | { | |
c1aebf87 | 369 | char *buf = (char *)alloca (sect_size - 20 + 1); |
192b62ce TT |
370 | bfd_get_section_contents (nbfd.get (), spu_name, buf, 20, |
371 | sect_size - 20); | |
9592c5d0 UW |
372 | buf[sect_size - 20] = '\0'; |
373 | ||
90d92a63 | 374 | bfd_set_filename (nbfd.get (), xstrdup (buf)); |
9592c5d0 UW |
375 | } |
376 | } | |
377 | ||
771b4502 UW |
378 | return nbfd; |
379 | } | |
380 | ||
381 | /* INFERIOR_FD is a file handle passed by the inferior to the | |
382 | spu_run system call. Assuming the SPE context was allocated | |
383 | by the libspe library, try to retrieve the main SPE executable | |
384 | file from its copy within the target process. */ | |
385 | static void | |
386 | spu_symbol_file_add_from_memory (int inferior_fd) | |
387 | { | |
4179a487 | 388 | ULONGEST addr; |
771b4502 | 389 | |
22c90ac1 | 390 | gdb_byte id[128]; |
771b4502 | 391 | char annex[32]; |
9b409511 YQ |
392 | ULONGEST len; |
393 | enum target_xfer_status status; | |
771b4502 UW |
394 | |
395 | /* Read object ID. */ | |
396 | xsnprintf (annex, sizeof annex, "%d/object-id", inferior_fd); | |
9b409511 YQ |
397 | status = spu_proc_xfer_spu (annex, id, NULL, 0, sizeof id, &len); |
398 | if (status != TARGET_XFER_OK || len >= sizeof id) | |
771b4502 UW |
399 | return; |
400 | id[len] = 0; | |
22c90ac1 | 401 | addr = strtoulst ((const char *) id, NULL, 16); |
b9efddcd | 402 | if (!addr) |
771b4502 UW |
403 | return; |
404 | ||
405 | /* Open BFD representing SPE executable and read its symbols. */ | |
192b62ce TT |
406 | gdb_bfd_ref_ptr nbfd (spu_bfd_open (addr)); |
407 | if (nbfd != NULL) | |
8ac244b4 | 408 | { |
192b62ce | 409 | symbol_file_add_from_bfd (nbfd.get (), bfd_get_filename (nbfd), |
d64ad97c | 410 | SYMFILE_VERBOSE | SYMFILE_MAINLINE, |
8ac244b4 | 411 | NULL, 0, NULL); |
8ac244b4 | 412 | } |
771b4502 UW |
413 | } |
414 | ||
415 | ||
416 | /* Override the post_startup_inferior routine to continue running | |
417 | the inferior until the first spu_run system call. */ | |
f6ac5f3d PA |
418 | void |
419 | spu_linux_nat_target::post_startup_inferior (ptid_t ptid) | |
771b4502 UW |
420 | { |
421 | int fd; | |
4179a487 | 422 | ULONGEST addr; |
771b4502 | 423 | |
e38504b3 | 424 | int tid = ptid.lwp (); |
771b4502 | 425 | if (tid == 0) |
e99b03dc | 426 | tid = ptid.pid (); |
771b4502 UW |
427 | |
428 | while (!parse_spufs_run (&fd, &addr)) | |
429 | { | |
430 | ptrace (PT_SYSCALL, tid, (PTRACE_TYPE_ARG3) 0, 0); | |
431 | waitpid (tid, NULL, __WALL | __WNOTHREAD); | |
432 | } | |
433 | } | |
434 | ||
435 | /* Override the post_attach routine to try load the SPE executable | |
436 | file image from its copy inside the target process. */ | |
f6ac5f3d PA |
437 | void |
438 | spu_linux_nat_target::post_attach (int pid) | |
771b4502 UW |
439 | { |
440 | int fd; | |
4179a487 | 441 | ULONGEST addr; |
771b4502 UW |
442 | |
443 | /* Like child_post_startup_inferior, if we happened to attach to | |
444 | the inferior while it wasn't currently in spu_run, continue | |
445 | running it until we get back there. */ | |
446 | while (!parse_spufs_run (&fd, &addr)) | |
447 | { | |
448 | ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0); | |
449 | waitpid (pid, NULL, __WALL | __WNOTHREAD); | |
450 | } | |
451 | ||
452 | /* If the user has not provided an executable file, try to extract | |
453 | the image from inside the target process. */ | |
454 | if (!get_exec_file (0)) | |
455 | spu_symbol_file_add_from_memory (fd); | |
456 | } | |
457 | ||
458 | /* Wait for child PTID to do something. Return id of the child, | |
459 | minus_one_ptid in case of error; store status into *OURSTATUS. */ | |
f6ac5f3d | 460 | ptid_t |
2be4d7f0 UW |
461 | spu_linux_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus, |
462 | int options) | |
771b4502 UW |
463 | { |
464 | int save_errno; | |
465 | int status; | |
466 | pid_t pid; | |
467 | ||
468 | do | |
469 | { | |
470 | set_sigint_trap (); /* Causes SIGINT to be passed on to the | |
471 | attached process. */ | |
771b4502 | 472 | |
e99b03dc | 473 | pid = waitpid (ptid.pid (), &status, 0); |
771b4502 UW |
474 | if (pid == -1 && errno == ECHILD) |
475 | /* Try again with __WCLONE to check cloned processes. */ | |
e99b03dc | 476 | pid = waitpid (ptid.pid (), &status, __WCLONE); |
771b4502 UW |
477 | |
478 | save_errno = errno; | |
479 | ||
480 | /* Make sure we don't report an event for the exit of the | |
481 | original program, if we've detached from it. */ | |
dfd4cc63 | 482 | if (pid != -1 && !WIFSTOPPED (status) |
e99b03dc | 483 | && pid != inferior_ptid.pid ()) |
771b4502 UW |
484 | { |
485 | pid = -1; | |
486 | save_errno = EINTR; | |
487 | } | |
488 | ||
771b4502 UW |
489 | clear_sigint_trap (); |
490 | } | |
491 | while (pid == -1 && save_errno == EINTR); | |
492 | ||
493 | if (pid == -1) | |
494 | { | |
b9efddcd | 495 | warning (_("Child process unexpectedly missing: %s"), |
771b4502 UW |
496 | safe_strerror (save_errno)); |
497 | ||
498 | /* Claim it exited with unknown signal. */ | |
499 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; | |
a493e3e2 | 500 | ourstatus->value.sig = GDB_SIGNAL_UNKNOWN; |
fb66883a | 501 | return inferior_ptid; |
771b4502 UW |
502 | } |
503 | ||
504 | store_waitstatus (ourstatus, status); | |
f2907e49 | 505 | return ptid_t (pid); |
771b4502 UW |
506 | } |
507 | ||
508 | /* Override the fetch_inferior_register routine. */ | |
f6ac5f3d PA |
509 | void |
510 | spu_linux_nat_target::fetch_registers (struct regcache *regcache, int regno) | |
771b4502 UW |
511 | { |
512 | int fd; | |
4179a487 | 513 | ULONGEST addr; |
771b4502 | 514 | |
639a9038 SM |
515 | /* Since we use functions that rely on inferior_ptid, we need to set and |
516 | restore it. */ | |
517 | scoped_restore save_ptid | |
222312d3 | 518 | = make_scoped_restore (&inferior_ptid, regcache->ptid ()); |
639a9038 | 519 | |
771b4502 UW |
520 | /* We must be stopped on a spu_run system call. */ |
521 | if (!parse_spufs_run (&fd, &addr)) | |
522 | return; | |
523 | ||
524 | /* The ID register holds the spufs file handle. */ | |
525 | if (regno == -1 || regno == SPU_ID_REGNUM) | |
526 | { | |
ac7936df | 527 | struct gdbarch *gdbarch = regcache->arch (); |
e17a4113 | 528 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
e362b510 | 529 | gdb_byte buf[4]; |
e17a4113 | 530 | store_unsigned_integer (buf, 4, byte_order, fd); |
73e1c03f | 531 | regcache->raw_supply (SPU_ID_REGNUM, buf); |
771b4502 UW |
532 | } |
533 | ||
534 | /* The NPC register is found at ADDR. */ | |
535 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
536 | { | |
537 | gdb_byte buf[4]; | |
538 | if (fetch_ppc_memory (addr, buf, 4) == 0) | |
73e1c03f | 539 | regcache->raw_supply (SPU_PC_REGNUM, buf); |
771b4502 UW |
540 | } |
541 | ||
542 | /* The GPRs are found in the "regs" spufs file. */ | |
543 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS)) | |
544 | { | |
545 | gdb_byte buf[16 * SPU_NUM_GPRS]; | |
546 | char annex[32]; | |
547 | int i; | |
9b409511 | 548 | ULONGEST len; |
771b4502 UW |
549 | |
550 | xsnprintf (annex, sizeof annex, "%d/regs", fd); | |
9b409511 YQ |
551 | if ((spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf, &len) |
552 | == TARGET_XFER_OK) | |
553 | && len == sizeof buf) | |
771b4502 | 554 | for (i = 0; i < SPU_NUM_GPRS; i++) |
73e1c03f | 555 | regcache->raw_supply (i, buf + i*16); |
771b4502 UW |
556 | } |
557 | } | |
558 | ||
559 | /* Override the store_inferior_register routine. */ | |
f6ac5f3d PA |
560 | void |
561 | spu_linux_nat_target::store_registers (struct regcache *regcache, int regno) | |
771b4502 UW |
562 | { |
563 | int fd; | |
4179a487 | 564 | ULONGEST addr; |
771b4502 | 565 | |
639a9038 SM |
566 | /* Since we use functions that rely on inferior_ptid, we need to set and |
567 | restore it. */ | |
568 | scoped_restore save_ptid | |
222312d3 | 569 | = make_scoped_restore (&inferior_ptid, regcache->ptid ()); |
639a9038 | 570 | |
771b4502 UW |
571 | /* We must be stopped on a spu_run system call. */ |
572 | if (!parse_spufs_run (&fd, &addr)) | |
573 | return; | |
574 | ||
575 | /* The NPC register is found at ADDR. */ | |
576 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
577 | { | |
578 | gdb_byte buf[4]; | |
34a79281 | 579 | regcache->raw_collect (SPU_PC_REGNUM, buf); |
771b4502 UW |
580 | store_ppc_memory (addr, buf, 4); |
581 | } | |
582 | ||
583 | /* The GPRs are found in the "regs" spufs file. */ | |
584 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_GPRS)) | |
585 | { | |
586 | gdb_byte buf[16 * SPU_NUM_GPRS]; | |
587 | char annex[32]; | |
588 | int i; | |
9b409511 | 589 | ULONGEST len; |
771b4502 UW |
590 | |
591 | for (i = 0; i < SPU_NUM_GPRS; i++) | |
34a79281 | 592 | regcache->raw_collect (i, buf + i*16); |
771b4502 UW |
593 | |
594 | xsnprintf (annex, sizeof annex, "%d/regs", fd); | |
9b409511 | 595 | spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf, &len); |
771b4502 UW |
596 | } |
597 | } | |
598 | ||
599 | /* Override the to_xfer_partial routine. */ | |
f6ac5f3d PA |
600 | enum target_xfer_status |
601 | spu_linux_nat_target::xfer_partial (enum target_object object, const char *annex, | |
602 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
603 | ULONGEST offset, ULONGEST len, | |
604 | ULONGEST *xfered_len) | |
771b4502 | 605 | { |
23d964e7 | 606 | if (object == TARGET_OBJECT_SPU) |
9b409511 YQ |
607 | return spu_proc_xfer_spu (annex, readbuf, writebuf, offset, len, |
608 | xfered_len); | |
23d964e7 | 609 | |
771b4502 UW |
610 | if (object == TARGET_OBJECT_MEMORY) |
611 | { | |
612 | int fd; | |
4179a487 | 613 | ULONGEST addr; |
d2ed6730 UW |
614 | char mem_annex[32], lslr_annex[32]; |
615 | gdb_byte buf[32]; | |
616 | ULONGEST lslr; | |
9b409511 | 617 | enum target_xfer_status ret; |
771b4502 UW |
618 | |
619 | /* We must be stopped on a spu_run system call. */ | |
620 | if (!parse_spufs_run (&fd, &addr)) | |
9b409511 | 621 | return TARGET_XFER_EOF; |
771b4502 UW |
622 | |
623 | /* Use the "mem" spufs file to access SPU local store. */ | |
624 | xsnprintf (mem_annex, sizeof mem_annex, "%d/mem", fd); | |
9b409511 YQ |
625 | ret = spu_proc_xfer_spu (mem_annex, readbuf, writebuf, offset, len, |
626 | xfered_len); | |
627 | if (ret == TARGET_XFER_OK) | |
d2ed6730 UW |
628 | return ret; |
629 | ||
630 | /* SPU local store access wraps the address around at the | |
631 | local store limit. We emulate this here. To avoid needing | |
632 | an extra access to retrieve the LSLR, we only do that after | |
633 | trying the original address first, and getting end-of-file. */ | |
634 | xsnprintf (lslr_annex, sizeof lslr_annex, "%d/lslr", fd); | |
635 | memset (buf, 0, sizeof buf); | |
9b409511 YQ |
636 | if (spu_proc_xfer_spu (lslr_annex, buf, NULL, 0, sizeof buf, xfered_len) |
637 | != TARGET_XFER_OK) | |
d2ed6730 UW |
638 | return ret; |
639 | ||
22c90ac1 | 640 | lslr = strtoulst ((const char *) buf, NULL, 16); |
d2ed6730 | 641 | return spu_proc_xfer_spu (mem_annex, readbuf, writebuf, |
9b409511 | 642 | offset & lslr, len, xfered_len); |
771b4502 UW |
643 | } |
644 | ||
2ed4b548 | 645 | return TARGET_XFER_E_IO; |
771b4502 UW |
646 | } |
647 | ||
648 | /* Override the to_can_use_hw_breakpoint routine. */ | |
f6ac5f3d PA |
649 | int |
650 | spu_linux_nat_target::can_use_hw_breakpoint (enum bptype type, | |
651 | int cnt, int othertype) | |
771b4502 UW |
652 | { |
653 | return 0; | |
654 | } | |
655 | ||
771b4502 UW |
656 | /* Initialize SPU native target. */ |
657 | void | |
658 | _initialize_spu_nat (void) | |
659 | { | |
d9f719f1 | 660 | add_inf_child_target (&the_spu_linux_nat_target); |
771b4502 | 661 | } |