Commit | Line | Data |
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a13e2c95 | 1 | /* Low level interface to SPUs, for the remote server for GDB. |
7b6bb8da JB |
2 | Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 |
3 | Free Software Foundation, Inc. | |
a13e2c95 UW |
4 | |
5 | Contributed by Ulrich Weigand <uweigand@de.ibm.com>. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
a13e2c95 UW |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
a13e2c95 UW |
21 | |
22 | #include "server.h" | |
23 | ||
24 | #include <sys/wait.h> | |
25 | #include <stdio.h> | |
26 | #include <sys/ptrace.h> | |
27 | #include <fcntl.h> | |
28 | #include <string.h> | |
29 | #include <stdlib.h> | |
30 | #include <unistd.h> | |
31 | #include <errno.h> | |
32 | #include <sys/syscall.h> | |
33 | ||
34 | /* Some older glibc versions do not define this. */ | |
35 | #ifndef __WNOTHREAD | |
36 | #define __WNOTHREAD 0x20000000 /* Don't wait on children of other | |
1b3f6016 | 37 | threads in this group */ |
a13e2c95 UW |
38 | #endif |
39 | ||
40 | #define PTRACE_TYPE_RET long | |
41 | #define PTRACE_TYPE_ARG3 long | |
42 | ||
43 | /* Number of registers. */ | |
44 | #define SPU_NUM_REGS 130 | |
45 | #define SPU_NUM_CORE_REGS 128 | |
46 | ||
47 | /* Special registers. */ | |
48 | #define SPU_ID_REGNUM 128 | |
49 | #define SPU_PC_REGNUM 129 | |
50 | ||
51 | /* PPU side system calls. */ | |
52 | #define INSTR_SC 0x44000002 | |
53 | #define NR_spu_run 0x0116 | |
54 | ||
55 | /* Get current thread ID (Linux task ID). */ | |
5472f405 | 56 | #define current_ptid ((struct inferior_list_entry *)current_inferior)->id |
a13e2c95 UW |
57 | |
58 | /* These are used in remote-utils.c. */ | |
59 | int using_threads = 0; | |
a13e2c95 | 60 | |
d05b4ac3 UW |
61 | /* Defined in auto-generated file reg-spu.c. */ |
62 | void init_registers_spu (void); | |
63 | ||
a13e2c95 UW |
64 | |
65 | /* Fetch PPU register REGNO. */ | |
66 | static CORE_ADDR | |
67 | fetch_ppc_register (int regno) | |
68 | { | |
69 | PTRACE_TYPE_RET res; | |
70 | ||
5472f405 | 71 | int tid = ptid_get_lwp (current_ptid); |
a13e2c95 UW |
72 | |
73 | #ifndef __powerpc64__ | |
74 | /* If running as a 32-bit process on a 64-bit system, we attempt | |
75 | to get the full 64-bit register content of the target process. | |
76 | If the PPC special ptrace call fails, we're on a 32-bit system; | |
77 | just fall through to the regular ptrace call in that case. */ | |
78 | { | |
79 | char buf[8]; | |
80 | ||
81 | errno = 0; | |
82 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
83 | (PTRACE_TYPE_ARG3) (regno * 8), buf); | |
84 | if (errno == 0) | |
85 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
86 | (PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4); | |
87 | if (errno == 0) | |
88 | return (CORE_ADDR) *(unsigned long long *)buf; | |
89 | } | |
90 | #endif | |
91 | ||
92 | errno = 0; | |
93 | res = ptrace (PT_READ_U, tid, | |
1b3f6016 | 94 | (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0); |
a13e2c95 UW |
95 | if (errno != 0) |
96 | { | |
97 | char mess[128]; | |
98 | sprintf (mess, "reading PPC register #%d", regno); | |
99 | perror_with_name (mess); | |
100 | } | |
101 | ||
102 | return (CORE_ADDR) (unsigned long) res; | |
103 | } | |
104 | ||
105 | /* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */ | |
106 | static int | |
107 | fetch_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET *word) | |
108 | { | |
109 | errno = 0; | |
110 | ||
111 | #ifndef __powerpc64__ | |
112 | if (memaddr >> 32) | |
113 | { | |
114 | unsigned long long addr_8 = (unsigned long long) memaddr; | |
115 | ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); | |
116 | } | |
117 | else | |
118 | #endif | |
119 | *word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0); | |
120 | ||
121 | return errno; | |
122 | } | |
123 | ||
124 | /* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */ | |
125 | static int | |
126 | store_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET word) | |
127 | { | |
128 | errno = 0; | |
129 | ||
130 | #ifndef __powerpc64__ | |
131 | if (memaddr >> 32) | |
132 | { | |
133 | unsigned long long addr_8 = (unsigned long long) memaddr; | |
134 | ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); | |
135 | } | |
136 | else | |
137 | #endif | |
138 | ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word); | |
139 | ||
140 | return errno; | |
141 | } | |
142 | ||
143 | /* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */ | |
144 | static int | |
145 | fetch_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len) | |
146 | { | |
147 | int i, ret; | |
148 | ||
149 | CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET); | |
150 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) | |
151 | / sizeof (PTRACE_TYPE_RET)); | |
152 | PTRACE_TYPE_RET *buffer; | |
153 | ||
5472f405 | 154 | int tid = ptid_get_lwp (current_ptid); |
a13e2c95 UW |
155 | |
156 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
157 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
158 | if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[i])) != 0) | |
159 | return ret; | |
160 | ||
161 | memcpy (myaddr, | |
162 | (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
163 | len); | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | /* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */ | |
169 | static int | |
170 | store_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len) | |
171 | { | |
172 | int i, ret; | |
173 | ||
174 | CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET); | |
175 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) | |
176 | / sizeof (PTRACE_TYPE_RET)); | |
177 | PTRACE_TYPE_RET *buffer; | |
178 | ||
5472f405 | 179 | int tid = ptid_get_lwp (current_ptid); |
a13e2c95 UW |
180 | |
181 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
182 | ||
183 | if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET)) | |
184 | if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[0])) != 0) | |
185 | return ret; | |
186 | ||
187 | if (count > 1) | |
188 | if ((ret = fetch_ppc_memory_1 (tid, addr + (count - 1) | |
189 | * sizeof (PTRACE_TYPE_RET), | |
190 | &buffer[count - 1])) != 0) | |
191 | return ret; | |
192 | ||
193 | memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
1b3f6016 | 194 | myaddr, len); |
a13e2c95 UW |
195 | |
196 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
197 | if ((ret = store_ppc_memory_1 (tid, addr, buffer[i])) != 0) | |
198 | return ret; | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | ||
204 | /* If the PPU thread is currently stopped on a spu_run system call, | |
205 | return to FD and ADDR the file handle and NPC parameter address | |
206 | used with the system call. Return non-zero if successful. */ | |
1b3f6016 | 207 | static int |
a13e2c95 UW |
208 | parse_spufs_run (int *fd, CORE_ADDR *addr) |
209 | { | |
210 | char buf[4]; | |
211 | CORE_ADDR pc = fetch_ppc_register (32); /* nip */ | |
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. */ | |
217 | if (*(unsigned int *)buf != INSTR_SC) | |
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 int | |
233 | spu_proc_xfer_spu (const char *annex, unsigned char *readbuf, | |
234 | const unsigned char *writebuf, | |
235 | CORE_ADDR offset, int len) | |
236 | { | |
237 | char buf[128]; | |
238 | int fd = 0; | |
239 | int ret = -1; | |
240 | ||
241 | if (!annex) | |
242 | return 0; | |
243 | ||
5472f405 | 244 | sprintf (buf, "/proc/%ld/fd/%s", ptid_get_lwp (current_ptid), annex); |
a13e2c95 UW |
245 | fd = open (buf, writebuf? O_WRONLY : O_RDONLY); |
246 | if (fd <= 0) | |
247 | return -1; | |
248 | ||
249 | if (offset != 0 | |
250 | && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) | |
251 | { | |
252 | close (fd); | |
374c1d38 | 253 | return 0; |
a13e2c95 UW |
254 | } |
255 | ||
256 | if (writebuf) | |
257 | ret = write (fd, writebuf, (size_t) len); | |
258 | else if (readbuf) | |
259 | ret = read (fd, readbuf, (size_t) len); | |
260 | ||
261 | close (fd); | |
262 | return ret; | |
263 | } | |
264 | ||
265 | ||
266 | /* Start an inferior process and returns its pid. | |
267 | ALLARGS is a vector of program-name and args. */ | |
268 | static int | |
269 | spu_create_inferior (char *program, char **allargs) | |
270 | { | |
271 | int pid; | |
95954743 | 272 | ptid_t ptid; |
a13e2c95 UW |
273 | |
274 | pid = fork (); | |
275 | if (pid < 0) | |
276 | perror_with_name ("fork"); | |
277 | ||
278 | if (pid == 0) | |
279 | { | |
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 | ||
95954743 PA |
294 | add_process (pid, 0); |
295 | ||
296 | ptid = ptid_build (pid, pid, 0); | |
297 | add_thread (ptid, NULL); | |
a13e2c95 UW |
298 | return pid; |
299 | } | |
300 | ||
301 | /* Attach to an inferior process. */ | |
302 | int | |
303 | spu_attach (unsigned long pid) | |
304 | { | |
95954743 PA |
305 | ptid_t ptid; |
306 | ||
a13e2c95 UW |
307 | if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0) |
308 | { | |
309 | fprintf (stderr, "Cannot attach to process %ld: %s (%d)\n", pid, | |
310 | strerror (errno), errno); | |
311 | fflush (stderr); | |
312 | _exit (0177); | |
313 | } | |
314 | ||
95954743 PA |
315 | add_process (pid, 1); |
316 | ptid = ptid_build (pid, pid, 0); | |
317 | add_thread (ptid, NULL); | |
a13e2c95 UW |
318 | return 0; |
319 | } | |
320 | ||
321 | /* Kill the inferior process. */ | |
95954743 | 322 | static int |
5472f405 | 323 | spu_kill (int pid) |
a13e2c95 | 324 | { |
4168d2d6 | 325 | int status, ret; |
5472f405 UW |
326 | struct process_info *process = find_process_pid (pid); |
327 | if (process == NULL) | |
328 | return -1; | |
329 | ||
330 | ptrace (PTRACE_KILL, pid, 0, 0); | |
4168d2d6 UW |
331 | |
332 | do { | |
333 | ret = waitpid (pid, &status, 0); | |
334 | if (WIFEXITED (status) || WIFSIGNALED (status)) | |
335 | break; | |
336 | } while (ret != -1 || errno != ECHILD); | |
337 | ||
338 | clear_inferiors (); | |
5472f405 | 339 | remove_process (process); |
95954743 | 340 | return 0; |
a13e2c95 UW |
341 | } |
342 | ||
343 | /* Detach from inferior process. */ | |
dd6953e1 | 344 | static int |
95954743 | 345 | spu_detach (int pid) |
a13e2c95 | 346 | { |
5472f405 UW |
347 | struct process_info *process = find_process_pid (pid); |
348 | if (process == NULL) | |
349 | return -1; | |
350 | ||
351 | ptrace (PTRACE_DETACH, pid, 0, 0); | |
4168d2d6 UW |
352 | |
353 | clear_inferiors (); | |
5472f405 | 354 | remove_process (process); |
dd6953e1 | 355 | return 0; |
a13e2c95 UW |
356 | } |
357 | ||
505106cd PA |
358 | static void |
359 | spu_mourn (struct process_info *process) | |
360 | { | |
361 | remove_process (process); | |
362 | } | |
363 | ||
444d6139 | 364 | static void |
95954743 | 365 | spu_join (int pid) |
444d6139 PA |
366 | { |
367 | int status, ret; | |
5472f405 UW |
368 | struct process_info *process; |
369 | ||
370 | process = find_process_pid (pid); | |
371 | if (process == NULL) | |
372 | return; | |
444d6139 PA |
373 | |
374 | do { | |
5472f405 | 375 | ret = waitpid (pid, &status, 0); |
444d6139 PA |
376 | if (WIFEXITED (status) || WIFSIGNALED (status)) |
377 | break; | |
378 | } while (ret != -1 || errno != ECHILD); | |
379 | } | |
380 | ||
a13e2c95 UW |
381 | /* Return nonzero if the given thread is still alive. */ |
382 | static int | |
95954743 | 383 | spu_thread_alive (ptid_t ptid) |
a13e2c95 | 384 | { |
5472f405 | 385 | return ptid_equal (ptid, current_ptid); |
a13e2c95 UW |
386 | } |
387 | ||
388 | /* Resume process. */ | |
389 | static void | |
2bd7c093 | 390 | spu_resume (struct thread_resume *resume_info, size_t n) |
a13e2c95 | 391 | { |
2bd7c093 | 392 | size_t i; |
a13e2c95 | 393 | |
2bd7c093 | 394 | for (i = 0; i < n; i++) |
95954743 | 395 | if (ptid_equal (resume_info[i].thread, minus_one_ptid) |
5472f405 | 396 | || ptid_equal (resume_info[i].thread, current_ptid)) |
2bd7c093 PA |
397 | break; |
398 | ||
399 | if (i == n) | |
a13e2c95 UW |
400 | return; |
401 | ||
402 | /* We don't support hardware single-stepping right now, assume | |
403 | GDB knows to use software single-stepping. */ | |
bd99dc85 | 404 | if (resume_info[i].kind == resume_step) |
a13e2c95 UW |
405 | fprintf (stderr, "Hardware single-step not supported.\n"); |
406 | ||
407 | regcache_invalidate (); | |
408 | ||
409 | errno = 0; | |
5472f405 | 410 | ptrace (PTRACE_CONT, ptid_get_lwp (current_ptid), 0, resume_info[i].sig); |
a13e2c95 UW |
411 | if (errno) |
412 | perror_with_name ("ptrace"); | |
413 | } | |
414 | ||
415 | /* Wait for process, returns status. */ | |
95954743 PA |
416 | static ptid_t |
417 | spu_wait (ptid_t ptid, struct target_waitstatus *ourstatus, int options) | |
a13e2c95 | 418 | { |
5472f405 | 419 | int pid = ptid_get_pid (ptid); |
a13e2c95 UW |
420 | int w; |
421 | int ret; | |
422 | ||
a13e2c95 UW |
423 | while (1) |
424 | { | |
5472f405 | 425 | ret = waitpid (pid, &w, WNOHANG | __WALL | __WNOTHREAD); |
a13e2c95 UW |
426 | |
427 | if (ret == -1) | |
428 | { | |
429 | if (errno != ECHILD) | |
430 | perror_with_name ("waitpid"); | |
431 | } | |
432 | else if (ret > 0) | |
433 | break; | |
434 | ||
435 | usleep (1000); | |
436 | } | |
437 | ||
438 | /* On the first wait, continue running the inferior until we are | |
439 | blocked inside an spu_run system call. */ | |
440 | if (!server_waiting) | |
441 | { | |
442 | int fd; | |
443 | CORE_ADDR addr; | |
444 | ||
445 | while (!parse_spufs_run (&fd, &addr)) | |
446 | { | |
5472f405 UW |
447 | ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0); |
448 | waitpid (pid, NULL, __WALL | __WNOTHREAD); | |
a13e2c95 UW |
449 | } |
450 | } | |
451 | ||
a13e2c95 UW |
452 | if (WIFEXITED (w)) |
453 | { | |
454 | fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w)); | |
5b1c542e PA |
455 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
456 | ourstatus->value.integer = WEXITSTATUS (w); | |
a13e2c95 | 457 | clear_inferiors (); |
95954743 | 458 | return pid_to_ptid (ret); |
a13e2c95 UW |
459 | } |
460 | else if (!WIFSTOPPED (w)) | |
461 | { | |
462 | fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w)); | |
5b1c542e PA |
463 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
464 | ourstatus->value.sig = target_signal_from_host (WTERMSIG (w)); | |
a13e2c95 | 465 | clear_inferiors (); |
95954743 | 466 | return pid_to_ptid (ret); |
a13e2c95 UW |
467 | } |
468 | ||
469 | /* After attach, we may have received a SIGSTOP. Do not return this | |
470 | as signal to GDB, or else it will try to continue with SIGSTOP ... */ | |
471 | if (!server_waiting) | |
472 | { | |
5b1c542e PA |
473 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
474 | ourstatus->value.sig = TARGET_SIGNAL_0; | |
95954743 | 475 | return ptid_build (ret, ret, 0); |
a13e2c95 UW |
476 | } |
477 | ||
5b1c542e PA |
478 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
479 | ourstatus->value.sig = target_signal_from_host (WSTOPSIG (w)); | |
95954743 | 480 | return ptid_build (ret, ret, 0); |
a13e2c95 UW |
481 | } |
482 | ||
483 | /* Fetch inferior registers. */ | |
484 | static void | |
85492558 | 485 | spu_fetch_registers (struct regcache *regcache, int regno) |
a13e2c95 UW |
486 | { |
487 | int fd; | |
488 | CORE_ADDR addr; | |
489 | ||
a13e2c95 UW |
490 | /* We must be stopped on a spu_run system call. */ |
491 | if (!parse_spufs_run (&fd, &addr)) | |
492 | return; | |
493 | ||
494 | /* The ID register holds the spufs file handle. */ | |
495 | if (regno == -1 || regno == SPU_ID_REGNUM) | |
85492558 | 496 | supply_register (regcache, SPU_ID_REGNUM, (char *)&fd); |
a13e2c95 UW |
497 | |
498 | /* The NPC register is found at ADDR. */ | |
499 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
500 | { | |
501 | char buf[4]; | |
502 | if (fetch_ppc_memory (addr, buf, 4) == 0) | |
85492558 | 503 | supply_register (regcache, SPU_PC_REGNUM, buf); |
a13e2c95 UW |
504 | } |
505 | ||
506 | /* The GPRs are found in the "regs" spufs file. */ | |
507 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS)) | |
508 | { | |
509 | unsigned char buf[16*SPU_NUM_CORE_REGS]; | |
510 | char annex[32]; | |
511 | int i; | |
512 | ||
513 | sprintf (annex, "%d/regs", fd); | |
514 | if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf) | |
515 | for (i = 0; i < SPU_NUM_CORE_REGS; i++) | |
85492558 | 516 | supply_register (regcache, i, buf + i*16); |
a13e2c95 UW |
517 | } |
518 | } | |
519 | ||
520 | /* Store inferior registers. */ | |
521 | static void | |
85492558 | 522 | spu_store_registers (struct regcache *regcache, int regno) |
a13e2c95 UW |
523 | { |
524 | int fd; | |
525 | CORE_ADDR addr; | |
526 | ||
527 | /* ??? Some callers use 0 to mean all registers. */ | |
528 | if (regno == 0) | |
529 | regno = -1; | |
530 | ||
531 | /* We must be stopped on a spu_run system call. */ | |
532 | if (!parse_spufs_run (&fd, &addr)) | |
533 | return; | |
534 | ||
535 | /* The NPC register is found at ADDR. */ | |
536 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
537 | { | |
538 | char buf[4]; | |
85492558 | 539 | collect_register (regcache, SPU_PC_REGNUM, buf); |
a13e2c95 UW |
540 | store_ppc_memory (addr, buf, 4); |
541 | } | |
542 | ||
543 | /* The GPRs are found in the "regs" spufs file. */ | |
544 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS)) | |
545 | { | |
546 | unsigned char buf[16*SPU_NUM_CORE_REGS]; | |
547 | char annex[32]; | |
548 | int i; | |
549 | ||
550 | for (i = 0; i < SPU_NUM_CORE_REGS; i++) | |
85492558 | 551 | collect_register (regcache, i, buf + i*16); |
a13e2c95 UW |
552 | |
553 | sprintf (annex, "%d/regs", fd); | |
554 | spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf); | |
555 | } | |
556 | } | |
557 | ||
558 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
559 | to debugger memory starting at MYADDR. */ | |
560 | static int | |
561 | spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) | |
562 | { | |
563 | int fd, ret; | |
564 | CORE_ADDR addr; | |
d2ed6730 UW |
565 | char annex[32], lslr_annex[32], buf[32]; |
566 | CORE_ADDR lslr; | |
a13e2c95 UW |
567 | |
568 | /* We must be stopped on a spu_run system call. */ | |
569 | if (!parse_spufs_run (&fd, &addr)) | |
570 | return 0; | |
571 | ||
572 | /* Use the "mem" spufs file to access SPU local store. */ | |
573 | sprintf (annex, "%d/mem", fd); | |
574 | ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len); | |
d2ed6730 UW |
575 | if (ret > 0) |
576 | return ret == len ? 0 : EIO; | |
577 | ||
578 | /* SPU local store access wraps the address around at the | |
579 | local store limit. We emulate this here. To avoid needing | |
580 | an extra access to retrieve the LSLR, we only do that after | |
581 | trying the original address first, and getting end-of-file. */ | |
582 | sprintf (lslr_annex, "%d/lslr", fd); | |
583 | memset (buf, 0, sizeof buf); | |
584 | if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL, | |
585 | 0, sizeof buf) <= 0) | |
586 | return ret; | |
587 | ||
588 | lslr = strtoul (buf, NULL, 16); | |
589 | ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr & lslr, len); | |
590 | ||
a13e2c95 UW |
591 | return ret == len ? 0 : EIO; |
592 | } | |
593 | ||
594 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
595 | to inferior's memory at MEMADDR. | |
596 | On failure (cannot write the inferior) | |
597 | returns the value of errno. */ | |
598 | static int | |
599 | spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len) | |
600 | { | |
601 | int fd, ret; | |
602 | CORE_ADDR addr; | |
d2ed6730 UW |
603 | char annex[32], lslr_annex[32], buf[32]; |
604 | CORE_ADDR lslr; | |
a13e2c95 UW |
605 | |
606 | /* We must be stopped on a spu_run system call. */ | |
607 | if (!parse_spufs_run (&fd, &addr)) | |
608 | return 0; | |
609 | ||
610 | /* Use the "mem" spufs file to access SPU local store. */ | |
611 | sprintf (annex, "%d/mem", fd); | |
612 | ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len); | |
d2ed6730 UW |
613 | if (ret > 0) |
614 | return ret == len ? 0 : EIO; | |
615 | ||
616 | /* SPU local store access wraps the address around at the | |
617 | local store limit. We emulate this here. To avoid needing | |
618 | an extra access to retrieve the LSLR, we only do that after | |
619 | trying the original address first, and getting end-of-file. */ | |
620 | sprintf (lslr_annex, "%d/lslr", fd); | |
621 | memset (buf, 0, sizeof buf); | |
622 | if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL, | |
623 | 0, sizeof buf) <= 0) | |
624 | return ret; | |
625 | ||
626 | lslr = strtoul (buf, NULL, 16); | |
627 | ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr & lslr, len); | |
628 | ||
a13e2c95 UW |
629 | return ret == len ? 0 : EIO; |
630 | } | |
631 | ||
632 | /* Look up special symbols -- unneded here. */ | |
633 | static void | |
634 | spu_look_up_symbols (void) | |
635 | { | |
636 | } | |
637 | ||
638 | /* Send signal to inferior. */ | |
639 | static void | |
ef57601b | 640 | spu_request_interrupt (void) |
a13e2c95 | 641 | { |
5472f405 | 642 | syscall (SYS_tkill, ptid_get_lwp (current_ptid), SIGINT); |
a13e2c95 UW |
643 | } |
644 | ||
a13e2c95 UW |
645 | static struct target_ops spu_target_ops = { |
646 | spu_create_inferior, | |
647 | spu_attach, | |
648 | spu_kill, | |
649 | spu_detach, | |
505106cd | 650 | spu_mourn, |
444d6139 | 651 | spu_join, |
a13e2c95 UW |
652 | spu_thread_alive, |
653 | spu_resume, | |
654 | spu_wait, | |
655 | spu_fetch_registers, | |
656 | spu_store_registers, | |
90d74c30 | 657 | NULL, /* prepare_to_access_memory */ |
0146f85b | 658 | NULL, /* done_accessing_memory */ |
a13e2c95 UW |
659 | spu_read_memory, |
660 | spu_write_memory, | |
661 | spu_look_up_symbols, | |
ef57601b | 662 | spu_request_interrupt, |
a13e2c95 | 663 | NULL, |
ab39bf24 UW |
664 | NULL, |
665 | NULL, | |
666 | NULL, | |
667 | NULL, | |
668 | NULL, | |
669 | NULL, | |
0e7f50da | 670 | spu_proc_xfer_spu, |
59a016f0 | 671 | hostio_last_error_from_errno, |
a13e2c95 UW |
672 | }; |
673 | ||
674 | void | |
675 | initialize_low (void) | |
676 | { | |
677 | static const unsigned char breakpoint[] = { 0x00, 0x00, 0x3f, 0xff }; | |
678 | ||
679 | set_target_ops (&spu_target_ops); | |
680 | set_breakpoint_data (breakpoint, sizeof breakpoint); | |
d05b4ac3 | 681 | init_registers_spu (); |
a13e2c95 | 682 | } |