Commit | Line | Data |
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a13e2c95 | 1 | /* Low level interface to SPUs, for the remote server for GDB. |
ecd75fc8 | 2 | Copyright (C) 2006-2014 Free Software Foundation, Inc. |
a13e2c95 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 |
a13e2c95 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/>. */ |
a13e2c95 UW |
20 | |
21 | #include "server.h" | |
22 | ||
8bdce1ff | 23 | #include "gdb_wait.h" |
a13e2c95 UW |
24 | #include <stdio.h> |
25 | #include <sys/ptrace.h> | |
26 | #include <fcntl.h> | |
27 | #include <string.h> | |
28 | #include <stdlib.h> | |
29 | #include <unistd.h> | |
30 | #include <errno.h> | |
31 | #include <sys/syscall.h> | |
602e3198 | 32 | #include "filestuff.h" |
533b0600 | 33 | #include "hostio.h" |
a13e2c95 UW |
34 | |
35 | /* Some older glibc versions do not define this. */ | |
36 | #ifndef __WNOTHREAD | |
37 | #define __WNOTHREAD 0x20000000 /* Don't wait on children of other | |
1b3f6016 | 38 | threads in this group */ |
a13e2c95 UW |
39 | #endif |
40 | ||
41 | #define PTRACE_TYPE_RET long | |
42 | #define PTRACE_TYPE_ARG3 long | |
43 | ||
44 | /* Number of registers. */ | |
45 | #define SPU_NUM_REGS 130 | |
46 | #define SPU_NUM_CORE_REGS 128 | |
47 | ||
48 | /* Special registers. */ | |
49 | #define SPU_ID_REGNUM 128 | |
50 | #define SPU_PC_REGNUM 129 | |
51 | ||
52 | /* PPU side system calls. */ | |
53 | #define INSTR_SC 0x44000002 | |
54 | #define NR_spu_run 0x0116 | |
55 | ||
a13e2c95 UW |
56 | /* These are used in remote-utils.c. */ |
57 | int using_threads = 0; | |
a13e2c95 | 58 | |
d05b4ac3 UW |
59 | /* Defined in auto-generated file reg-spu.c. */ |
60 | void init_registers_spu (void); | |
3aee8918 | 61 | extern const struct target_desc *tdesc_spu; |
a13e2c95 UW |
62 | |
63 | /* Fetch PPU register REGNO. */ | |
64 | static CORE_ADDR | |
65 | fetch_ppc_register (int regno) | |
66 | { | |
67 | PTRACE_TYPE_RET res; | |
68 | ||
5472f405 | 69 | int tid = ptid_get_lwp (current_ptid); |
a13e2c95 UW |
70 | |
71 | #ifndef __powerpc64__ | |
72 | /* If running as a 32-bit process on a 64-bit system, we attempt | |
73 | to get the full 64-bit register content of the target process. | |
74 | If the PPC special ptrace call fails, we're on a 32-bit system; | |
75 | just fall through to the regular ptrace call in that case. */ | |
76 | { | |
77 | char buf[8]; | |
78 | ||
79 | errno = 0; | |
80 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
81 | (PTRACE_TYPE_ARG3) (regno * 8), buf); | |
82 | if (errno == 0) | |
83 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
84 | (PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4); | |
85 | if (errno == 0) | |
86 | return (CORE_ADDR) *(unsigned long long *)buf; | |
87 | } | |
88 | #endif | |
89 | ||
90 | errno = 0; | |
91 | res = ptrace (PT_READ_U, tid, | |
1b3f6016 | 92 | (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0); |
a13e2c95 UW |
93 | if (errno != 0) |
94 | { | |
95 | char mess[128]; | |
96 | sprintf (mess, "reading PPC register #%d", regno); | |
97 | perror_with_name (mess); | |
98 | } | |
99 | ||
100 | return (CORE_ADDR) (unsigned long) res; | |
101 | } | |
102 | ||
103 | /* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */ | |
104 | static int | |
105 | fetch_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET *word) | |
106 | { | |
107 | errno = 0; | |
108 | ||
109 | #ifndef __powerpc64__ | |
110 | if (memaddr >> 32) | |
111 | { | |
112 | unsigned long long addr_8 = (unsigned long long) memaddr; | |
113 | ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); | |
114 | } | |
115 | else | |
116 | #endif | |
117 | *word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0); | |
118 | ||
119 | return errno; | |
120 | } | |
121 | ||
122 | /* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */ | |
123 | static int | |
124 | store_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET word) | |
125 | { | |
126 | errno = 0; | |
127 | ||
128 | #ifndef __powerpc64__ | |
129 | if (memaddr >> 32) | |
130 | { | |
131 | unsigned long long addr_8 = (unsigned long long) memaddr; | |
132 | ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); | |
133 | } | |
134 | else | |
135 | #endif | |
136 | ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word); | |
137 | ||
138 | return errno; | |
139 | } | |
140 | ||
141 | /* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */ | |
142 | static int | |
143 | fetch_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len) | |
144 | { | |
145 | int i, ret; | |
146 | ||
147 | CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET); | |
148 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) | |
149 | / sizeof (PTRACE_TYPE_RET)); | |
150 | PTRACE_TYPE_RET *buffer; | |
151 | ||
5472f405 | 152 | int tid = ptid_get_lwp (current_ptid); |
a13e2c95 UW |
153 | |
154 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
155 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
156 | if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[i])) != 0) | |
157 | return ret; | |
158 | ||
159 | memcpy (myaddr, | |
160 | (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
161 | len); | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | /* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */ | |
167 | static int | |
168 | store_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len) | |
169 | { | |
170 | int i, ret; | |
171 | ||
172 | CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET); | |
173 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) | |
174 | / sizeof (PTRACE_TYPE_RET)); | |
175 | PTRACE_TYPE_RET *buffer; | |
176 | ||
5472f405 | 177 | int tid = ptid_get_lwp (current_ptid); |
a13e2c95 UW |
178 | |
179 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
180 | ||
181 | if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET)) | |
182 | if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[0])) != 0) | |
183 | return ret; | |
184 | ||
185 | if (count > 1) | |
186 | if ((ret = fetch_ppc_memory_1 (tid, addr + (count - 1) | |
187 | * sizeof (PTRACE_TYPE_RET), | |
188 | &buffer[count - 1])) != 0) | |
189 | return ret; | |
190 | ||
191 | memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
1b3f6016 | 192 | myaddr, len); |
a13e2c95 UW |
193 | |
194 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
195 | if ((ret = store_ppc_memory_1 (tid, addr, buffer[i])) != 0) | |
196 | return ret; | |
197 | ||
198 | return 0; | |
199 | } | |
200 | ||
201 | ||
202 | /* If the PPU thread is currently stopped on a spu_run system call, | |
203 | return to FD and ADDR the file handle and NPC parameter address | |
204 | used with the system call. Return non-zero if successful. */ | |
1b3f6016 | 205 | static int |
a13e2c95 UW |
206 | parse_spufs_run (int *fd, CORE_ADDR *addr) |
207 | { | |
9d236627 | 208 | unsigned int insn; |
a13e2c95 UW |
209 | CORE_ADDR pc = fetch_ppc_register (32); /* nip */ |
210 | ||
211 | /* Fetch instruction preceding current NIP. */ | |
9d236627 | 212 | if (fetch_ppc_memory (pc-4, (char *) &insn, 4) != 0) |
a13e2c95 UW |
213 | return 0; |
214 | /* It should be a "sc" instruction. */ | |
9d236627 | 215 | if (insn != INSTR_SC) |
a13e2c95 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 | ||
228 | /* Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF, | |
229 | using the /proc file system. */ | |
230 | static int | |
231 | spu_proc_xfer_spu (const char *annex, unsigned char *readbuf, | |
232 | const unsigned char *writebuf, | |
233 | CORE_ADDR offset, int len) | |
234 | { | |
235 | char buf[128]; | |
236 | int fd = 0; | |
237 | int ret = -1; | |
238 | ||
239 | if (!annex) | |
240 | return 0; | |
241 | ||
5472f405 | 242 | sprintf (buf, "/proc/%ld/fd/%s", ptid_get_lwp (current_ptid), annex); |
a13e2c95 UW |
243 | fd = open (buf, writebuf? O_WRONLY : O_RDONLY); |
244 | if (fd <= 0) | |
245 | return -1; | |
246 | ||
247 | if (offset != 0 | |
248 | && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) | |
249 | { | |
250 | close (fd); | |
374c1d38 | 251 | return 0; |
a13e2c95 UW |
252 | } |
253 | ||
254 | if (writebuf) | |
255 | ret = write (fd, writebuf, (size_t) len); | |
256 | else if (readbuf) | |
257 | ret = read (fd, readbuf, (size_t) len); | |
258 | ||
259 | close (fd); | |
260 | return ret; | |
261 | } | |
262 | ||
263 | ||
264 | /* Start an inferior process and returns its pid. | |
265 | ALLARGS is a vector of program-name and args. */ | |
266 | static int | |
267 | spu_create_inferior (char *program, char **allargs) | |
268 | { | |
269 | int pid; | |
95954743 | 270 | ptid_t ptid; |
3aee8918 | 271 | struct process_info *proc; |
a13e2c95 UW |
272 | |
273 | pid = fork (); | |
274 | if (pid < 0) | |
275 | perror_with_name ("fork"); | |
276 | ||
277 | if (pid == 0) | |
278 | { | |
602e3198 | 279 | close_most_fds (); |
a13e2c95 UW |
280 | ptrace (PTRACE_TRACEME, 0, 0, 0); |
281 | ||
282 | setpgid (0, 0); | |
283 | ||
2b876972 DJ |
284 | execv (program, allargs); |
285 | if (errno == ENOENT) | |
286 | execvp (program, allargs); | |
a13e2c95 UW |
287 | |
288 | fprintf (stderr, "Cannot exec %s: %s.\n", program, | |
289 | strerror (errno)); | |
290 | fflush (stderr); | |
291 | _exit (0177); | |
292 | } | |
293 | ||
3aee8918 PA |
294 | proc = add_process (pid, 0); |
295 | proc->tdesc = tdesc_spu; | |
95954743 PA |
296 | |
297 | ptid = ptid_build (pid, pid, 0); | |
298 | add_thread (ptid, NULL); | |
a13e2c95 UW |
299 | return pid; |
300 | } | |
301 | ||
302 | /* Attach to an inferior process. */ | |
303 | int | |
304 | spu_attach (unsigned long pid) | |
305 | { | |
95954743 | 306 | ptid_t ptid; |
3aee8918 | 307 | struct process_info *proc; |
95954743 | 308 | |
a13e2c95 UW |
309 | if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0) |
310 | { | |
311 | fprintf (stderr, "Cannot attach to process %ld: %s (%d)\n", pid, | |
312 | strerror (errno), errno); | |
313 | fflush (stderr); | |
314 | _exit (0177); | |
315 | } | |
316 | ||
3aee8918 PA |
317 | proc = add_process (pid, 1); |
318 | proc->tdesc = tdesc_spu; | |
95954743 PA |
319 | ptid = ptid_build (pid, pid, 0); |
320 | add_thread (ptid, NULL); | |
a13e2c95 UW |
321 | return 0; |
322 | } | |
323 | ||
324 | /* Kill the inferior process. */ | |
95954743 | 325 | static int |
5472f405 | 326 | spu_kill (int pid) |
a13e2c95 | 327 | { |
4168d2d6 | 328 | int status, ret; |
5472f405 UW |
329 | struct process_info *process = find_process_pid (pid); |
330 | if (process == NULL) | |
331 | return -1; | |
332 | ||
333 | ptrace (PTRACE_KILL, pid, 0, 0); | |
4168d2d6 UW |
334 | |
335 | do { | |
336 | ret = waitpid (pid, &status, 0); | |
337 | if (WIFEXITED (status) || WIFSIGNALED (status)) | |
338 | break; | |
339 | } while (ret != -1 || errno != ECHILD); | |
340 | ||
341 | clear_inferiors (); | |
5472f405 | 342 | remove_process (process); |
95954743 | 343 | return 0; |
a13e2c95 UW |
344 | } |
345 | ||
346 | /* Detach from inferior process. */ | |
dd6953e1 | 347 | static int |
95954743 | 348 | spu_detach (int pid) |
a13e2c95 | 349 | { |
5472f405 UW |
350 | struct process_info *process = find_process_pid (pid); |
351 | if (process == NULL) | |
352 | return -1; | |
353 | ||
354 | ptrace (PTRACE_DETACH, pid, 0, 0); | |
4168d2d6 UW |
355 | |
356 | clear_inferiors (); | |
5472f405 | 357 | remove_process (process); |
dd6953e1 | 358 | return 0; |
a13e2c95 UW |
359 | } |
360 | ||
505106cd PA |
361 | static void |
362 | spu_mourn (struct process_info *process) | |
363 | { | |
364 | remove_process (process); | |
365 | } | |
366 | ||
444d6139 | 367 | static void |
95954743 | 368 | spu_join (int pid) |
444d6139 PA |
369 | { |
370 | int status, ret; | |
371 | ||
372 | do { | |
5472f405 | 373 | ret = waitpid (pid, &status, 0); |
444d6139 PA |
374 | if (WIFEXITED (status) || WIFSIGNALED (status)) |
375 | break; | |
376 | } while (ret != -1 || errno != ECHILD); | |
377 | } | |
378 | ||
a13e2c95 UW |
379 | /* Return nonzero if the given thread is still alive. */ |
380 | static int | |
95954743 | 381 | spu_thread_alive (ptid_t ptid) |
a13e2c95 | 382 | { |
5472f405 | 383 | return ptid_equal (ptid, current_ptid); |
a13e2c95 UW |
384 | } |
385 | ||
386 | /* Resume process. */ | |
387 | static void | |
2bd7c093 | 388 | spu_resume (struct thread_resume *resume_info, size_t n) |
a13e2c95 | 389 | { |
2bd7c093 | 390 | size_t i; |
a13e2c95 | 391 | |
2bd7c093 | 392 | for (i = 0; i < n; i++) |
95954743 | 393 | if (ptid_equal (resume_info[i].thread, minus_one_ptid) |
5472f405 | 394 | || ptid_equal (resume_info[i].thread, current_ptid)) |
2bd7c093 PA |
395 | break; |
396 | ||
397 | if (i == n) | |
a13e2c95 UW |
398 | return; |
399 | ||
400 | /* We don't support hardware single-stepping right now, assume | |
401 | GDB knows to use software single-stepping. */ | |
bd99dc85 | 402 | if (resume_info[i].kind == resume_step) |
a13e2c95 UW |
403 | fprintf (stderr, "Hardware single-step not supported.\n"); |
404 | ||
405 | regcache_invalidate (); | |
406 | ||
407 | errno = 0; | |
5472f405 | 408 | ptrace (PTRACE_CONT, ptid_get_lwp (current_ptid), 0, resume_info[i].sig); |
a13e2c95 UW |
409 | if (errno) |
410 | perror_with_name ("ptrace"); | |
411 | } | |
412 | ||
413 | /* Wait for process, returns status. */ | |
95954743 PA |
414 | static ptid_t |
415 | spu_wait (ptid_t ptid, struct target_waitstatus *ourstatus, int options) | |
a13e2c95 | 416 | { |
5472f405 | 417 | int pid = ptid_get_pid (ptid); |
a13e2c95 UW |
418 | int w; |
419 | int ret; | |
420 | ||
a13e2c95 UW |
421 | while (1) |
422 | { | |
5472f405 | 423 | ret = waitpid (pid, &w, WNOHANG | __WALL | __WNOTHREAD); |
a13e2c95 UW |
424 | |
425 | if (ret == -1) | |
426 | { | |
427 | if (errno != ECHILD) | |
428 | perror_with_name ("waitpid"); | |
429 | } | |
430 | else if (ret > 0) | |
431 | break; | |
432 | ||
433 | usleep (1000); | |
434 | } | |
435 | ||
436 | /* On the first wait, continue running the inferior until we are | |
437 | blocked inside an spu_run system call. */ | |
438 | if (!server_waiting) | |
439 | { | |
440 | int fd; | |
441 | CORE_ADDR addr; | |
442 | ||
443 | while (!parse_spufs_run (&fd, &addr)) | |
444 | { | |
5472f405 UW |
445 | ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0); |
446 | waitpid (pid, NULL, __WALL | __WNOTHREAD); | |
a13e2c95 UW |
447 | } |
448 | } | |
449 | ||
a13e2c95 UW |
450 | if (WIFEXITED (w)) |
451 | { | |
452 | fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w)); | |
5b1c542e PA |
453 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
454 | ourstatus->value.integer = WEXITSTATUS (w); | |
a13e2c95 | 455 | clear_inferiors (); |
95954743 | 456 | return pid_to_ptid (ret); |
a13e2c95 UW |
457 | } |
458 | else if (!WIFSTOPPED (w)) | |
459 | { | |
460 | fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w)); | |
5b1c542e | 461 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
2ea28649 | 462 | ourstatus->value.sig = gdb_signal_from_host (WTERMSIG (w)); |
a13e2c95 | 463 | clear_inferiors (); |
95954743 | 464 | return pid_to_ptid (ret); |
a13e2c95 UW |
465 | } |
466 | ||
467 | /* After attach, we may have received a SIGSTOP. Do not return this | |
468 | as signal to GDB, or else it will try to continue with SIGSTOP ... */ | |
469 | if (!server_waiting) | |
470 | { | |
5b1c542e | 471 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
a493e3e2 | 472 | ourstatus->value.sig = GDB_SIGNAL_0; |
95954743 | 473 | return ptid_build (ret, ret, 0); |
a13e2c95 UW |
474 | } |
475 | ||
5b1c542e | 476 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
2ea28649 | 477 | ourstatus->value.sig = gdb_signal_from_host (WSTOPSIG (w)); |
95954743 | 478 | return ptid_build (ret, ret, 0); |
a13e2c95 UW |
479 | } |
480 | ||
481 | /* Fetch inferior registers. */ | |
482 | static void | |
85492558 | 483 | spu_fetch_registers (struct regcache *regcache, int regno) |
a13e2c95 UW |
484 | { |
485 | int fd; | |
486 | CORE_ADDR addr; | |
487 | ||
a13e2c95 UW |
488 | /* We must be stopped on a spu_run system call. */ |
489 | if (!parse_spufs_run (&fd, &addr)) | |
490 | return; | |
491 | ||
492 | /* The ID register holds the spufs file handle. */ | |
493 | if (regno == -1 || regno == SPU_ID_REGNUM) | |
85492558 | 494 | supply_register (regcache, SPU_ID_REGNUM, (char *)&fd); |
a13e2c95 UW |
495 | |
496 | /* The NPC register is found at ADDR. */ | |
497 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
498 | { | |
499 | char buf[4]; | |
500 | if (fetch_ppc_memory (addr, buf, 4) == 0) | |
85492558 | 501 | supply_register (regcache, SPU_PC_REGNUM, buf); |
a13e2c95 UW |
502 | } |
503 | ||
504 | /* The GPRs are found in the "regs" spufs file. */ | |
505 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS)) | |
506 | { | |
507 | unsigned char buf[16*SPU_NUM_CORE_REGS]; | |
508 | char annex[32]; | |
509 | int i; | |
510 | ||
511 | sprintf (annex, "%d/regs", fd); | |
512 | if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf) | |
513 | for (i = 0; i < SPU_NUM_CORE_REGS; i++) | |
85492558 | 514 | supply_register (regcache, i, buf + i*16); |
a13e2c95 UW |
515 | } |
516 | } | |
517 | ||
518 | /* Store inferior registers. */ | |
519 | static void | |
85492558 | 520 | spu_store_registers (struct regcache *regcache, int regno) |
a13e2c95 UW |
521 | { |
522 | int fd; | |
523 | CORE_ADDR addr; | |
524 | ||
525 | /* ??? Some callers use 0 to mean all registers. */ | |
526 | if (regno == 0) | |
527 | regno = -1; | |
528 | ||
529 | /* We must be stopped on a spu_run system call. */ | |
530 | if (!parse_spufs_run (&fd, &addr)) | |
531 | return; | |
532 | ||
533 | /* The NPC register is found at ADDR. */ | |
534 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
535 | { | |
536 | char buf[4]; | |
85492558 | 537 | collect_register (regcache, SPU_PC_REGNUM, buf); |
a13e2c95 UW |
538 | store_ppc_memory (addr, buf, 4); |
539 | } | |
540 | ||
541 | /* The GPRs are found in the "regs" spufs file. */ | |
542 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS)) | |
543 | { | |
544 | unsigned char buf[16*SPU_NUM_CORE_REGS]; | |
545 | char annex[32]; | |
546 | int i; | |
547 | ||
548 | for (i = 0; i < SPU_NUM_CORE_REGS; i++) | |
85492558 | 549 | collect_register (regcache, i, buf + i*16); |
a13e2c95 UW |
550 | |
551 | sprintf (annex, "%d/regs", fd); | |
552 | spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf); | |
553 | } | |
554 | } | |
555 | ||
556 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
557 | to debugger memory starting at MYADDR. */ | |
558 | static int | |
559 | spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) | |
560 | { | |
561 | int fd, ret; | |
562 | CORE_ADDR addr; | |
d2ed6730 UW |
563 | char annex[32], lslr_annex[32], buf[32]; |
564 | CORE_ADDR lslr; | |
a13e2c95 UW |
565 | |
566 | /* We must be stopped on a spu_run system call. */ | |
567 | if (!parse_spufs_run (&fd, &addr)) | |
568 | return 0; | |
569 | ||
570 | /* Use the "mem" spufs file to access SPU local store. */ | |
571 | sprintf (annex, "%d/mem", fd); | |
572 | ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len); | |
d2ed6730 UW |
573 | if (ret > 0) |
574 | return ret == len ? 0 : EIO; | |
575 | ||
576 | /* SPU local store access wraps the address around at the | |
577 | local store limit. We emulate this here. To avoid needing | |
578 | an extra access to retrieve the LSLR, we only do that after | |
579 | trying the original address first, and getting end-of-file. */ | |
580 | sprintf (lslr_annex, "%d/lslr", fd); | |
581 | memset (buf, 0, sizeof buf); | |
582 | if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL, | |
583 | 0, sizeof buf) <= 0) | |
584 | return ret; | |
585 | ||
586 | lslr = strtoul (buf, NULL, 16); | |
587 | ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr & lslr, len); | |
588 | ||
a13e2c95 UW |
589 | return ret == len ? 0 : EIO; |
590 | } | |
591 | ||
592 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
593 | to inferior's memory at MEMADDR. | |
594 | On failure (cannot write the inferior) | |
595 | returns the value of errno. */ | |
596 | static int | |
597 | spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len) | |
598 | { | |
599 | int fd, ret; | |
600 | CORE_ADDR addr; | |
d2ed6730 UW |
601 | char annex[32], lslr_annex[32], buf[32]; |
602 | CORE_ADDR lslr; | |
a13e2c95 UW |
603 | |
604 | /* We must be stopped on a spu_run system call. */ | |
605 | if (!parse_spufs_run (&fd, &addr)) | |
606 | return 0; | |
607 | ||
608 | /* Use the "mem" spufs file to access SPU local store. */ | |
609 | sprintf (annex, "%d/mem", fd); | |
610 | ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len); | |
d2ed6730 UW |
611 | if (ret > 0) |
612 | return ret == len ? 0 : EIO; | |
613 | ||
614 | /* SPU local store access wraps the address around at the | |
615 | local store limit. We emulate this here. To avoid needing | |
616 | an extra access to retrieve the LSLR, we only do that after | |
617 | trying the original address first, and getting end-of-file. */ | |
618 | sprintf (lslr_annex, "%d/lslr", fd); | |
619 | memset (buf, 0, sizeof buf); | |
620 | if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL, | |
621 | 0, sizeof buf) <= 0) | |
622 | return ret; | |
623 | ||
624 | lslr = strtoul (buf, NULL, 16); | |
625 | ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr & lslr, len); | |
626 | ||
a13e2c95 UW |
627 | return ret == len ? 0 : EIO; |
628 | } | |
629 | ||
630 | /* Look up special symbols -- unneded here. */ | |
631 | static void | |
632 | spu_look_up_symbols (void) | |
633 | { | |
634 | } | |
635 | ||
636 | /* Send signal to inferior. */ | |
637 | static void | |
ef57601b | 638 | spu_request_interrupt (void) |
a13e2c95 | 639 | { |
5472f405 | 640 | syscall (SYS_tkill, ptid_get_lwp (current_ptid), SIGINT); |
a13e2c95 UW |
641 | } |
642 | ||
a13e2c95 UW |
643 | static struct target_ops spu_target_ops = { |
644 | spu_create_inferior, | |
645 | spu_attach, | |
646 | spu_kill, | |
647 | spu_detach, | |
505106cd | 648 | spu_mourn, |
444d6139 | 649 | spu_join, |
a13e2c95 UW |
650 | spu_thread_alive, |
651 | spu_resume, | |
652 | spu_wait, | |
653 | spu_fetch_registers, | |
654 | spu_store_registers, | |
90d74c30 | 655 | NULL, /* prepare_to_access_memory */ |
0146f85b | 656 | NULL, /* done_accessing_memory */ |
a13e2c95 UW |
657 | spu_read_memory, |
658 | spu_write_memory, | |
659 | spu_look_up_symbols, | |
ef57601b | 660 | spu_request_interrupt, |
a13e2c95 | 661 | NULL, |
ab39bf24 UW |
662 | NULL, |
663 | NULL, | |
664 | NULL, | |
665 | NULL, | |
666 | NULL, | |
667 | NULL, | |
0e7f50da | 668 | spu_proc_xfer_spu, |
59a016f0 | 669 | hostio_last_error_from_errno, |
a13e2c95 UW |
670 | }; |
671 | ||
672 | void | |
673 | initialize_low (void) | |
674 | { | |
675 | static const unsigned char breakpoint[] = { 0x00, 0x00, 0x3f, 0xff }; | |
676 | ||
677 | set_target_ops (&spu_target_ops); | |
678 | set_breakpoint_data (breakpoint, sizeof breakpoint); | |
d05b4ac3 | 679 | init_registers_spu (); |
a13e2c95 | 680 | } |