Commit | Line | Data |
---|---|---|
a13e2c95 | 1 | /* Low level interface to SPUs, for the remote server for GDB. |
e2882c85 | 2 | Copyright (C) 2006-2018 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 <sys/ptrace.h> |
25 | #include <fcntl.h> | |
a13e2c95 | 26 | #include <unistd.h> |
a13e2c95 | 27 | #include <sys/syscall.h> |
602e3198 | 28 | #include "filestuff.h" |
533b0600 | 29 | #include "hostio.h" |
2090129c | 30 | #include "nat/fork-inferior.h" |
a13e2c95 UW |
31 | |
32 | /* Some older glibc versions do not define this. */ | |
33 | #ifndef __WNOTHREAD | |
34 | #define __WNOTHREAD 0x20000000 /* Don't wait on children of other | |
1b3f6016 | 35 | threads in this group */ |
a13e2c95 UW |
36 | #endif |
37 | ||
38 | #define PTRACE_TYPE_RET long | |
39 | #define PTRACE_TYPE_ARG3 long | |
40 | ||
41 | /* Number of registers. */ | |
42 | #define SPU_NUM_REGS 130 | |
43 | #define SPU_NUM_CORE_REGS 128 | |
44 | ||
45 | /* Special registers. */ | |
46 | #define SPU_ID_REGNUM 128 | |
47 | #define SPU_PC_REGNUM 129 | |
48 | ||
49 | /* PPU side system calls. */ | |
50 | #define INSTR_SC 0x44000002 | |
51 | #define NR_spu_run 0x0116 | |
52 | ||
a13e2c95 UW |
53 | /* These are used in remote-utils.c. */ |
54 | int using_threads = 0; | |
a13e2c95 | 55 | |
d05b4ac3 UW |
56 | /* Defined in auto-generated file reg-spu.c. */ |
57 | void init_registers_spu (void); | |
3aee8918 | 58 | extern const struct target_desc *tdesc_spu; |
a13e2c95 | 59 | |
fb78e89c AT |
60 | /* Software breakpoint instruction. */ |
61 | static const gdb_byte breakpoint[] = { 0x00, 0x00, 0x3f, 0xff }; | |
62 | ||
a13e2c95 UW |
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; | |
c1aebf87 | 80 | ptrace ((PTRACE_TYPE_ARG1) PPC_PTRACE_PEEKUSR_3264, tid, |
a13e2c95 UW |
81 | (PTRACE_TYPE_ARG3) (regno * 8), buf); |
82 | if (errno == 0) | |
c1aebf87 | 83 | ptrace ((PTRACE_TYPE_ARG1) PPC_PTRACE_PEEKUSR_3264, tid, |
a13e2c95 UW |
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; | |
c1aebf87 UW |
113 | ptrace ((PTRACE_TYPE_ARG1) PPC_PTRACE_PEEKTEXT_3264, tid, |
114 | (PTRACE_TYPE_ARG3) &addr_8, word); | |
a13e2c95 UW |
115 | } |
116 | else | |
117 | #endif | |
118 | *word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0); | |
119 | ||
120 | return errno; | |
121 | } | |
122 | ||
123 | /* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */ | |
124 | static int | |
125 | store_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET word) | |
126 | { | |
127 | errno = 0; | |
128 | ||
129 | #ifndef __powerpc64__ | |
130 | if (memaddr >> 32) | |
131 | { | |
132 | unsigned long long addr_8 = (unsigned long long) memaddr; | |
c1aebf87 UW |
133 | ptrace ((PTRACE_TYPE_ARG1) PPC_PTRACE_POKEDATA_3264, tid, |
134 | (PTRACE_TYPE_ARG3) &addr_8, word); | |
a13e2c95 UW |
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 | 155 | |
8d749320 | 156 | buffer = XALLOCAVEC (PTRACE_TYPE_RET, count); |
a13e2c95 UW |
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 | 180 | |
8d749320 | 181 | buffer = XALLOCAVEC (PTRACE_TYPE_RET, count); |
a13e2c95 UW |
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 | { | |
9d236627 | 210 | unsigned int insn; |
a13e2c95 UW |
211 | CORE_ADDR pc = fetch_ppc_register (32); /* nip */ |
212 | ||
213 | /* Fetch instruction preceding current NIP. */ | |
9d236627 | 214 | if (fetch_ppc_memory (pc-4, (char *) &insn, 4) != 0) |
a13e2c95 UW |
215 | return 0; |
216 | /* It should be a "sc" instruction. */ | |
9d236627 | 217 | if (insn != INSTR_SC) |
a13e2c95 UW |
218 | return 0; |
219 | /* System call number should be NR_spu_run. */ | |
220 | if (fetch_ppc_register (0) != NR_spu_run) | |
221 | return 0; | |
222 | ||
223 | /* Register 3 contains fd, register 4 the NPC param pointer. */ | |
224 | *fd = fetch_ppc_register (34); /* orig_gpr3 */ | |
225 | *addr = fetch_ppc_register (4); | |
226 | return 1; | |
227 | } | |
228 | ||
229 | ||
230 | /* Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF, | |
231 | using the /proc file system. */ | |
232 | static 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 | ||
2090129c SDJ |
265 | /* Callback to be used when calling fork_inferior, responsible for |
266 | actually initiating the tracing of the inferior. */ | |
267 | ||
268 | static void | |
269 | spu_ptrace_fun () | |
270 | { | |
271 | if (ptrace (PTRACE_TRACEME, 0, 0, 0) < 0) | |
272 | trace_start_error_with_name ("ptrace"); | |
273 | if (setpgid (0, 0) < 0) | |
274 | trace_start_error_with_name ("setpgid"); | |
275 | } | |
a13e2c95 UW |
276 | |
277 | /* Start an inferior process and returns its pid. | |
2090129c SDJ |
278 | PROGRAM is the name of the program to be started, and PROGRAM_ARGS |
279 | are its arguments. */ | |
280 | ||
a13e2c95 | 281 | static int |
2090129c | 282 | spu_create_inferior (const char *program, |
f5291a6f | 283 | const std::vector<char *> &program_args) |
a13e2c95 UW |
284 | { |
285 | int pid; | |
95954743 | 286 | ptid_t ptid; |
3aee8918 | 287 | struct process_info *proc; |
2090129c | 288 | std::string str_program_args = stringify_argv (program_args); |
a13e2c95 | 289 | |
2090129c SDJ |
290 | pid = fork_inferior (program, |
291 | str_program_args.c_str (), | |
9a6c7d9c | 292 | get_environ ()->envp (), spu_ptrace_fun, |
2090129c | 293 | NULL, NULL, NULL, NULL); |
a13e2c95 | 294 | |
2090129c | 295 | post_fork_inferior (pid, program); |
a13e2c95 | 296 | |
3aee8918 PA |
297 | proc = add_process (pid, 0); |
298 | proc->tdesc = tdesc_spu; | |
95954743 PA |
299 | |
300 | ptid = ptid_build (pid, pid, 0); | |
301 | add_thread (ptid, NULL); | |
a13e2c95 UW |
302 | return pid; |
303 | } | |
304 | ||
305 | /* Attach to an inferior process. */ | |
306 | int | |
307 | spu_attach (unsigned long pid) | |
308 | { | |
95954743 | 309 | ptid_t ptid; |
3aee8918 | 310 | struct process_info *proc; |
95954743 | 311 | |
a13e2c95 UW |
312 | if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0) |
313 | { | |
314 | fprintf (stderr, "Cannot attach to process %ld: %s (%d)\n", pid, | |
315 | strerror (errno), errno); | |
316 | fflush (stderr); | |
317 | _exit (0177); | |
318 | } | |
319 | ||
3aee8918 PA |
320 | proc = add_process (pid, 1); |
321 | proc->tdesc = tdesc_spu; | |
95954743 PA |
322 | ptid = ptid_build (pid, pid, 0); |
323 | add_thread (ptid, NULL); | |
a13e2c95 UW |
324 | return 0; |
325 | } | |
326 | ||
327 | /* Kill the inferior process. */ | |
95954743 | 328 | static int |
5472f405 | 329 | spu_kill (int pid) |
a13e2c95 | 330 | { |
4168d2d6 | 331 | int status, ret; |
5472f405 UW |
332 | struct process_info *process = find_process_pid (pid); |
333 | if (process == NULL) | |
334 | return -1; | |
335 | ||
336 | ptrace (PTRACE_KILL, pid, 0, 0); | |
4168d2d6 UW |
337 | |
338 | do { | |
339 | ret = waitpid (pid, &status, 0); | |
340 | if (WIFEXITED (status) || WIFSIGNALED (status)) | |
341 | break; | |
342 | } while (ret != -1 || errno != ECHILD); | |
343 | ||
344 | clear_inferiors (); | |
5472f405 | 345 | remove_process (process); |
95954743 | 346 | return 0; |
a13e2c95 UW |
347 | } |
348 | ||
349 | /* Detach from inferior process. */ | |
dd6953e1 | 350 | static int |
95954743 | 351 | spu_detach (int pid) |
a13e2c95 | 352 | { |
5472f405 UW |
353 | struct process_info *process = find_process_pid (pid); |
354 | if (process == NULL) | |
355 | return -1; | |
356 | ||
357 | ptrace (PTRACE_DETACH, pid, 0, 0); | |
4168d2d6 UW |
358 | |
359 | clear_inferiors (); | |
5472f405 | 360 | remove_process (process); |
dd6953e1 | 361 | return 0; |
a13e2c95 UW |
362 | } |
363 | ||
505106cd PA |
364 | static void |
365 | spu_mourn (struct process_info *process) | |
366 | { | |
367 | remove_process (process); | |
368 | } | |
369 | ||
444d6139 | 370 | static void |
95954743 | 371 | spu_join (int pid) |
444d6139 PA |
372 | { |
373 | int status, ret; | |
374 | ||
375 | do { | |
5472f405 | 376 | ret = waitpid (pid, &status, 0); |
444d6139 PA |
377 | if (WIFEXITED (status) || WIFSIGNALED (status)) |
378 | break; | |
379 | } while (ret != -1 || errno != ECHILD); | |
380 | } | |
381 | ||
a13e2c95 UW |
382 | /* Return nonzero if the given thread is still alive. */ |
383 | static int | |
95954743 | 384 | spu_thread_alive (ptid_t ptid) |
a13e2c95 | 385 | { |
5472f405 | 386 | return ptid_equal (ptid, current_ptid); |
a13e2c95 UW |
387 | } |
388 | ||
389 | /* Resume process. */ | |
390 | static void | |
2bd7c093 | 391 | spu_resume (struct thread_resume *resume_info, size_t n) |
a13e2c95 | 392 | { |
f0db101d | 393 | struct thread_info *thr = get_first_thread (); |
2bd7c093 | 394 | size_t i; |
a13e2c95 | 395 | |
2bd7c093 | 396 | for (i = 0; i < n; i++) |
95954743 | 397 | if (ptid_equal (resume_info[i].thread, minus_one_ptid) |
f0db101d | 398 | || ptid_equal (resume_info[i].thread, ptid_of (thr))) |
2bd7c093 PA |
399 | break; |
400 | ||
401 | if (i == n) | |
a13e2c95 UW |
402 | return; |
403 | ||
404 | /* We don't support hardware single-stepping right now, assume | |
405 | GDB knows to use software single-stepping. */ | |
bd99dc85 | 406 | if (resume_info[i].kind == resume_step) |
a13e2c95 UW |
407 | fprintf (stderr, "Hardware single-step not supported.\n"); |
408 | ||
409 | regcache_invalidate (); | |
410 | ||
411 | errno = 0; | |
f0db101d | 412 | ptrace (PTRACE_CONT, ptid_get_lwp (ptid_of (thr)), 0, resume_info[i].sig); |
a13e2c95 UW |
413 | if (errno) |
414 | perror_with_name ("ptrace"); | |
415 | } | |
416 | ||
417 | /* Wait for process, returns status. */ | |
95954743 PA |
418 | static ptid_t |
419 | spu_wait (ptid_t ptid, struct target_waitstatus *ourstatus, int options) | |
a13e2c95 | 420 | { |
5472f405 | 421 | int pid = ptid_get_pid (ptid); |
a13e2c95 UW |
422 | int w; |
423 | int ret; | |
424 | ||
a13e2c95 UW |
425 | while (1) |
426 | { | |
5472f405 | 427 | ret = waitpid (pid, &w, WNOHANG | __WALL | __WNOTHREAD); |
a13e2c95 UW |
428 | |
429 | if (ret == -1) | |
430 | { | |
431 | if (errno != ECHILD) | |
432 | perror_with_name ("waitpid"); | |
433 | } | |
434 | else if (ret > 0) | |
435 | break; | |
436 | ||
437 | usleep (1000); | |
438 | } | |
439 | ||
440 | /* On the first wait, continue running the inferior until we are | |
441 | blocked inside an spu_run system call. */ | |
442 | if (!server_waiting) | |
443 | { | |
444 | int fd; | |
445 | CORE_ADDR addr; | |
446 | ||
447 | while (!parse_spufs_run (&fd, &addr)) | |
448 | { | |
5472f405 UW |
449 | ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0); |
450 | waitpid (pid, NULL, __WALL | __WNOTHREAD); | |
a13e2c95 UW |
451 | } |
452 | } | |
453 | ||
a13e2c95 UW |
454 | if (WIFEXITED (w)) |
455 | { | |
456 | fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w)); | |
5b1c542e PA |
457 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
458 | ourstatus->value.integer = WEXITSTATUS (w); | |
a13e2c95 | 459 | clear_inferiors (); |
95954743 | 460 | return pid_to_ptid (ret); |
a13e2c95 UW |
461 | } |
462 | else if (!WIFSTOPPED (w)) | |
463 | { | |
464 | fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w)); | |
5b1c542e | 465 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
2ea28649 | 466 | ourstatus->value.sig = gdb_signal_from_host (WTERMSIG (w)); |
a13e2c95 | 467 | clear_inferiors (); |
95954743 | 468 | return pid_to_ptid (ret); |
a13e2c95 UW |
469 | } |
470 | ||
471 | /* After attach, we may have received a SIGSTOP. Do not return this | |
472 | as signal to GDB, or else it will try to continue with SIGSTOP ... */ | |
473 | if (!server_waiting) | |
474 | { | |
5b1c542e | 475 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
a493e3e2 | 476 | ourstatus->value.sig = GDB_SIGNAL_0; |
95954743 | 477 | return ptid_build (ret, ret, 0); |
a13e2c95 UW |
478 | } |
479 | ||
5b1c542e | 480 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
2ea28649 | 481 | ourstatus->value.sig = gdb_signal_from_host (WSTOPSIG (w)); |
95954743 | 482 | return ptid_build (ret, ret, 0); |
a13e2c95 UW |
483 | } |
484 | ||
485 | /* Fetch inferior registers. */ | |
486 | static void | |
85492558 | 487 | spu_fetch_registers (struct regcache *regcache, int regno) |
a13e2c95 UW |
488 | { |
489 | int fd; | |
490 | CORE_ADDR addr; | |
491 | ||
a13e2c95 UW |
492 | /* We must be stopped on a spu_run system call. */ |
493 | if (!parse_spufs_run (&fd, &addr)) | |
494 | return; | |
495 | ||
496 | /* The ID register holds the spufs file handle. */ | |
497 | if (regno == -1 || regno == SPU_ID_REGNUM) | |
85492558 | 498 | supply_register (regcache, SPU_ID_REGNUM, (char *)&fd); |
a13e2c95 UW |
499 | |
500 | /* The NPC register is found at ADDR. */ | |
501 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
502 | { | |
503 | char buf[4]; | |
504 | if (fetch_ppc_memory (addr, buf, 4) == 0) | |
85492558 | 505 | supply_register (regcache, SPU_PC_REGNUM, buf); |
a13e2c95 UW |
506 | } |
507 | ||
508 | /* The GPRs are found in the "regs" spufs file. */ | |
509 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS)) | |
510 | { | |
511 | unsigned char buf[16*SPU_NUM_CORE_REGS]; | |
512 | char annex[32]; | |
513 | int i; | |
514 | ||
515 | sprintf (annex, "%d/regs", fd); | |
516 | if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf) | |
517 | for (i = 0; i < SPU_NUM_CORE_REGS; i++) | |
85492558 | 518 | supply_register (regcache, i, buf + i*16); |
a13e2c95 UW |
519 | } |
520 | } | |
521 | ||
522 | /* Store inferior registers. */ | |
523 | static void | |
85492558 | 524 | spu_store_registers (struct regcache *regcache, int regno) |
a13e2c95 UW |
525 | { |
526 | int fd; | |
527 | CORE_ADDR addr; | |
528 | ||
529 | /* ??? Some callers use 0 to mean all registers. */ | |
530 | if (regno == 0) | |
531 | regno = -1; | |
532 | ||
533 | /* We must be stopped on a spu_run system call. */ | |
534 | if (!parse_spufs_run (&fd, &addr)) | |
535 | return; | |
536 | ||
537 | /* The NPC register is found at ADDR. */ | |
538 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
539 | { | |
540 | char buf[4]; | |
85492558 | 541 | collect_register (regcache, SPU_PC_REGNUM, buf); |
a13e2c95 UW |
542 | store_ppc_memory (addr, buf, 4); |
543 | } | |
544 | ||
545 | /* The GPRs are found in the "regs" spufs file. */ | |
546 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS)) | |
547 | { | |
548 | unsigned char buf[16*SPU_NUM_CORE_REGS]; | |
549 | char annex[32]; | |
550 | int i; | |
551 | ||
552 | for (i = 0; i < SPU_NUM_CORE_REGS; i++) | |
85492558 | 553 | collect_register (regcache, i, buf + i*16); |
a13e2c95 UW |
554 | |
555 | sprintf (annex, "%d/regs", fd); | |
556 | spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf); | |
557 | } | |
558 | } | |
559 | ||
560 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
561 | to debugger memory starting at MYADDR. */ | |
562 | static int | |
563 | spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) | |
564 | { | |
565 | int fd, ret; | |
566 | CORE_ADDR addr; | |
d2ed6730 UW |
567 | char annex[32], lslr_annex[32], buf[32]; |
568 | CORE_ADDR lslr; | |
a13e2c95 UW |
569 | |
570 | /* We must be stopped on a spu_run system call. */ | |
571 | if (!parse_spufs_run (&fd, &addr)) | |
572 | return 0; | |
573 | ||
574 | /* Use the "mem" spufs file to access SPU local store. */ | |
575 | sprintf (annex, "%d/mem", fd); | |
576 | ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len); | |
d2ed6730 UW |
577 | if (ret > 0) |
578 | return ret == len ? 0 : EIO; | |
579 | ||
580 | /* SPU local store access wraps the address around at the | |
581 | local store limit. We emulate this here. To avoid needing | |
582 | an extra access to retrieve the LSLR, we only do that after | |
583 | trying the original address first, and getting end-of-file. */ | |
584 | sprintf (lslr_annex, "%d/lslr", fd); | |
585 | memset (buf, 0, sizeof buf); | |
586 | if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL, | |
587 | 0, sizeof buf) <= 0) | |
588 | return ret; | |
589 | ||
590 | lslr = strtoul (buf, NULL, 16); | |
591 | ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr & lslr, len); | |
592 | ||
a13e2c95 UW |
593 | return ret == len ? 0 : EIO; |
594 | } | |
595 | ||
596 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
597 | to inferior's memory at MEMADDR. | |
598 | On failure (cannot write the inferior) | |
599 | returns the value of errno. */ | |
600 | static int | |
601 | spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len) | |
602 | { | |
603 | int fd, ret; | |
604 | CORE_ADDR addr; | |
d2ed6730 UW |
605 | char annex[32], lslr_annex[32], buf[32]; |
606 | CORE_ADDR lslr; | |
a13e2c95 UW |
607 | |
608 | /* We must be stopped on a spu_run system call. */ | |
609 | if (!parse_spufs_run (&fd, &addr)) | |
610 | return 0; | |
611 | ||
612 | /* Use the "mem" spufs file to access SPU local store. */ | |
613 | sprintf (annex, "%d/mem", fd); | |
614 | ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len); | |
d2ed6730 UW |
615 | if (ret > 0) |
616 | return ret == len ? 0 : EIO; | |
617 | ||
618 | /* SPU local store access wraps the address around at the | |
619 | local store limit. We emulate this here. To avoid needing | |
620 | an extra access to retrieve the LSLR, we only do that after | |
621 | trying the original address first, and getting end-of-file. */ | |
622 | sprintf (lslr_annex, "%d/lslr", fd); | |
623 | memset (buf, 0, sizeof buf); | |
624 | if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL, | |
625 | 0, sizeof buf) <= 0) | |
626 | return ret; | |
627 | ||
628 | lslr = strtoul (buf, NULL, 16); | |
629 | ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr & lslr, len); | |
630 | ||
a13e2c95 UW |
631 | return ret == len ? 0 : EIO; |
632 | } | |
633 | ||
634 | /* Look up special symbols -- unneded here. */ | |
635 | static void | |
636 | spu_look_up_symbols (void) | |
637 | { | |
638 | } | |
639 | ||
640 | /* Send signal to inferior. */ | |
641 | static void | |
ef57601b | 642 | spu_request_interrupt (void) |
a13e2c95 | 643 | { |
f0db101d PA |
644 | struct thread_info *thr = get_first_thread (); |
645 | ||
a8c6d4fc | 646 | syscall (SYS_tkill, lwpid_of (thr), SIGINT); |
a13e2c95 UW |
647 | } |
648 | ||
fb78e89c AT |
649 | /* Implementation of the target_ops method "sw_breakpoint_from_kind". */ |
650 | ||
651 | static const gdb_byte * | |
652 | spu_sw_breakpoint_from_kind (int kind, int *size) | |
653 | { | |
654 | *size = sizeof breakpoint; | |
655 | return breakpoint; | |
656 | } | |
657 | ||
a13e2c95 UW |
658 | static struct target_ops spu_target_ops = { |
659 | spu_create_inferior, | |
ece66d65 | 660 | NULL, /* post_create_inferior */ |
a13e2c95 UW |
661 | spu_attach, |
662 | spu_kill, | |
663 | spu_detach, | |
505106cd | 664 | spu_mourn, |
444d6139 | 665 | spu_join, |
a13e2c95 UW |
666 | spu_thread_alive, |
667 | spu_resume, | |
668 | spu_wait, | |
669 | spu_fetch_registers, | |
670 | spu_store_registers, | |
90d74c30 | 671 | NULL, /* prepare_to_access_memory */ |
0146f85b | 672 | NULL, /* done_accessing_memory */ |
a13e2c95 UW |
673 | spu_read_memory, |
674 | spu_write_memory, | |
675 | spu_look_up_symbols, | |
ef57601b | 676 | spu_request_interrupt, |
a13e2c95 | 677 | NULL, |
802e8e6d | 678 | NULL, /* supports_z_point_type */ |
ab39bf24 UW |
679 | NULL, |
680 | NULL, | |
f5771b1d PA |
681 | NULL, /* stopped_by_sw_breakpoint */ |
682 | NULL, /* supports_stopped_by_sw_breakpoint */ | |
683 | NULL, /* stopped_by_hw_breakpoint */ | |
684 | NULL, /* supports_stopped_by_hw_breakpoint */ | |
70b90b91 | 685 | NULL, /* supports_hardware_single_step */ |
ab39bf24 UW |
686 | NULL, |
687 | NULL, | |
688 | NULL, | |
689 | NULL, | |
0e7f50da | 690 | spu_proc_xfer_spu, |
59a016f0 | 691 | hostio_last_error_from_errno, |
fb78e89c AT |
692 | NULL, /* qxfer_osdata */ |
693 | NULL, /* qxfer_siginfo */ | |
694 | NULL, /* supports_non_stop */ | |
695 | NULL, /* async */ | |
696 | NULL, /* start_non_stop */ | |
697 | NULL, /* supports_multi_process */ | |
698 | NULL, /* supports_fork_events */ | |
699 | NULL, /* supports_vfork_events */ | |
700 | NULL, /* supports_exec_events */ | |
701 | NULL, /* handle_new_gdb_connection */ | |
702 | NULL, /* handle_monitor_command */ | |
703 | NULL, /* core_of_thread */ | |
704 | NULL, /* read_loadmap */ | |
705 | NULL, /* process_qsupported */ | |
706 | NULL, /* supports_tracepoints */ | |
707 | NULL, /* read_pc */ | |
708 | NULL, /* write_pc */ | |
709 | NULL, /* thread_stopped */ | |
710 | NULL, /* get_tib_address */ | |
711 | NULL, /* pause_all */ | |
712 | NULL, /* unpause_all */ | |
713 | NULL, /* stabilize_threads */ | |
714 | NULL, /* install_fast_tracepoint_jump_pad */ | |
715 | NULL, /* emit_ops */ | |
716 | NULL, /* supports_disable_randomization */ | |
717 | NULL, /* get_min_fast_tracepoint_insn_len */ | |
718 | NULL, /* qxfer_libraries_svr4 */ | |
719 | NULL, /* support_agent */ | |
720 | NULL, /* support_btrace */ | |
721 | NULL, /* enable_btrace */ | |
722 | NULL, /* disable_btrace */ | |
723 | NULL, /* read_btrace */ | |
724 | NULL, /* read_btrace_conf */ | |
725 | NULL, /* supports_range_stepping */ | |
726 | NULL, /* pid_to_exec_file */ | |
727 | NULL, /* multifs_open */ | |
728 | NULL, /* multifs_unlink */ | |
729 | NULL, /* multifs_readlink */ | |
730 | NULL, /* breakpoint_kind_from_pc */ | |
731 | spu_sw_breakpoint_from_kind, | |
a13e2c95 UW |
732 | }; |
733 | ||
734 | void | |
735 | initialize_low (void) | |
736 | { | |
a13e2c95 | 737 | set_target_ops (&spu_target_ops); |
d05b4ac3 | 738 | init_registers_spu (); |
a13e2c95 | 739 | } |