Commit | Line | Data |
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a13e2c95 | 1 | /* Low level interface to SPUs, for the remote server for GDB. |
28e7fd62 | 2 | Copyright (C) 2006-2013 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> | |
32 | ||
33 | /* Some older glibc versions do not define this. */ | |
34 | #ifndef __WNOTHREAD | |
35 | #define __WNOTHREAD 0x20000000 /* Don't wait on children of other | |
1b3f6016 | 36 | threads in this group */ |
a13e2c95 UW |
37 | #endif |
38 | ||
39 | #define PTRACE_TYPE_RET long | |
40 | #define PTRACE_TYPE_ARG3 long | |
41 | ||
42 | /* Number of registers. */ | |
43 | #define SPU_NUM_REGS 130 | |
44 | #define SPU_NUM_CORE_REGS 128 | |
45 | ||
46 | /* Special registers. */ | |
47 | #define SPU_ID_REGNUM 128 | |
48 | #define SPU_PC_REGNUM 129 | |
49 | ||
50 | /* PPU side system calls. */ | |
51 | #define INSTR_SC 0x44000002 | |
52 | #define NR_spu_run 0x0116 | |
53 | ||
a13e2c95 UW |
54 | /* These are used in remote-utils.c. */ |
55 | int using_threads = 0; | |
a13e2c95 | 56 | |
d05b4ac3 UW |
57 | /* Defined in auto-generated file reg-spu.c. */ |
58 | void init_registers_spu (void); | |
3aee8918 | 59 | extern const struct target_desc *tdesc_spu; |
a13e2c95 UW |
60 | |
61 | /* Fetch PPU register REGNO. */ | |
62 | static CORE_ADDR | |
63 | fetch_ppc_register (int regno) | |
64 | { | |
65 | PTRACE_TYPE_RET res; | |
66 | ||
5472f405 | 67 | int tid = ptid_get_lwp (current_ptid); |
a13e2c95 UW |
68 | |
69 | #ifndef __powerpc64__ | |
70 | /* If running as a 32-bit process on a 64-bit system, we attempt | |
71 | to get the full 64-bit register content of the target process. | |
72 | If the PPC special ptrace call fails, we're on a 32-bit system; | |
73 | just fall through to the regular ptrace call in that case. */ | |
74 | { | |
75 | char buf[8]; | |
76 | ||
77 | errno = 0; | |
78 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
79 | (PTRACE_TYPE_ARG3) (regno * 8), buf); | |
80 | if (errno == 0) | |
81 | ptrace (PPC_PTRACE_PEEKUSR_3264, tid, | |
82 | (PTRACE_TYPE_ARG3) (regno * 8 + 4), buf + 4); | |
83 | if (errno == 0) | |
84 | return (CORE_ADDR) *(unsigned long long *)buf; | |
85 | } | |
86 | #endif | |
87 | ||
88 | errno = 0; | |
89 | res = ptrace (PT_READ_U, tid, | |
1b3f6016 | 90 | (PTRACE_TYPE_ARG3) (regno * sizeof (PTRACE_TYPE_RET)), 0); |
a13e2c95 UW |
91 | if (errno != 0) |
92 | { | |
93 | char mess[128]; | |
94 | sprintf (mess, "reading PPC register #%d", regno); | |
95 | perror_with_name (mess); | |
96 | } | |
97 | ||
98 | return (CORE_ADDR) (unsigned long) res; | |
99 | } | |
100 | ||
101 | /* Fetch WORD from PPU memory at (aligned) MEMADDR in thread TID. */ | |
102 | static int | |
103 | fetch_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET *word) | |
104 | { | |
105 | errno = 0; | |
106 | ||
107 | #ifndef __powerpc64__ | |
108 | if (memaddr >> 32) | |
109 | { | |
110 | unsigned long long addr_8 = (unsigned long long) memaddr; | |
111 | ptrace (PPC_PTRACE_PEEKTEXT_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); | |
112 | } | |
113 | else | |
114 | #endif | |
115 | *word = ptrace (PT_READ_I, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, 0); | |
116 | ||
117 | return errno; | |
118 | } | |
119 | ||
120 | /* Store WORD into PPU memory at (aligned) MEMADDR in thread TID. */ | |
121 | static int | |
122 | store_ppc_memory_1 (int tid, CORE_ADDR memaddr, PTRACE_TYPE_RET word) | |
123 | { | |
124 | errno = 0; | |
125 | ||
126 | #ifndef __powerpc64__ | |
127 | if (memaddr >> 32) | |
128 | { | |
129 | unsigned long long addr_8 = (unsigned long long) memaddr; | |
130 | ptrace (PPC_PTRACE_POKEDATA_3264, tid, (PTRACE_TYPE_ARG3) &addr_8, word); | |
131 | } | |
132 | else | |
133 | #endif | |
134 | ptrace (PT_WRITE_D, tid, (PTRACE_TYPE_ARG3) (size_t) memaddr, word); | |
135 | ||
136 | return errno; | |
137 | } | |
138 | ||
139 | /* Fetch LEN bytes of PPU memory at MEMADDR to MYADDR. */ | |
140 | static int | |
141 | fetch_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len) | |
142 | { | |
143 | int i, ret; | |
144 | ||
145 | CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET); | |
146 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) | |
147 | / sizeof (PTRACE_TYPE_RET)); | |
148 | PTRACE_TYPE_RET *buffer; | |
149 | ||
5472f405 | 150 | int tid = ptid_get_lwp (current_ptid); |
a13e2c95 UW |
151 | |
152 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
153 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
154 | if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[i])) != 0) | |
155 | return ret; | |
156 | ||
157 | memcpy (myaddr, | |
158 | (char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
159 | len); | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | /* Store LEN bytes from MYADDR to PPU memory at MEMADDR. */ | |
165 | static int | |
166 | store_ppc_memory (CORE_ADDR memaddr, char *myaddr, int len) | |
167 | { | |
168 | int i, ret; | |
169 | ||
170 | CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_TYPE_RET); | |
171 | int count = ((((memaddr + len) - addr) + sizeof (PTRACE_TYPE_RET) - 1) | |
172 | / sizeof (PTRACE_TYPE_RET)); | |
173 | PTRACE_TYPE_RET *buffer; | |
174 | ||
5472f405 | 175 | int tid = ptid_get_lwp (current_ptid); |
a13e2c95 UW |
176 | |
177 | buffer = (PTRACE_TYPE_RET *) alloca (count * sizeof (PTRACE_TYPE_RET)); | |
178 | ||
179 | if (addr != memaddr || len < (int) sizeof (PTRACE_TYPE_RET)) | |
180 | if ((ret = fetch_ppc_memory_1 (tid, addr, &buffer[0])) != 0) | |
181 | return ret; | |
182 | ||
183 | if (count > 1) | |
184 | if ((ret = fetch_ppc_memory_1 (tid, addr + (count - 1) | |
185 | * sizeof (PTRACE_TYPE_RET), | |
186 | &buffer[count - 1])) != 0) | |
187 | return ret; | |
188 | ||
189 | memcpy ((char *) buffer + (memaddr & (sizeof (PTRACE_TYPE_RET) - 1)), | |
1b3f6016 | 190 | myaddr, len); |
a13e2c95 UW |
191 | |
192 | for (i = 0; i < count; i++, addr += sizeof (PTRACE_TYPE_RET)) | |
193 | if ((ret = store_ppc_memory_1 (tid, addr, buffer[i])) != 0) | |
194 | return ret; | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | ||
200 | /* If the PPU thread is currently stopped on a spu_run system call, | |
201 | return to FD and ADDR the file handle and NPC parameter address | |
202 | used with the system call. Return non-zero if successful. */ | |
1b3f6016 | 203 | static int |
a13e2c95 UW |
204 | parse_spufs_run (int *fd, CORE_ADDR *addr) |
205 | { | |
9d236627 | 206 | unsigned int insn; |
a13e2c95 UW |
207 | CORE_ADDR pc = fetch_ppc_register (32); /* nip */ |
208 | ||
209 | /* Fetch instruction preceding current NIP. */ | |
9d236627 | 210 | if (fetch_ppc_memory (pc-4, (char *) &insn, 4) != 0) |
a13e2c95 UW |
211 | return 0; |
212 | /* It should be a "sc" instruction. */ | |
9d236627 | 213 | if (insn != INSTR_SC) |
a13e2c95 UW |
214 | return 0; |
215 | /* System call number should be NR_spu_run. */ | |
216 | if (fetch_ppc_register (0) != NR_spu_run) | |
217 | return 0; | |
218 | ||
219 | /* Register 3 contains fd, register 4 the NPC param pointer. */ | |
220 | *fd = fetch_ppc_register (34); /* orig_gpr3 */ | |
221 | *addr = fetch_ppc_register (4); | |
222 | return 1; | |
223 | } | |
224 | ||
225 | ||
226 | /* Copy LEN bytes at OFFSET in spufs file ANNEX into/from READBUF or WRITEBUF, | |
227 | using the /proc file system. */ | |
228 | static int | |
229 | spu_proc_xfer_spu (const char *annex, unsigned char *readbuf, | |
230 | const unsigned char *writebuf, | |
231 | CORE_ADDR offset, int len) | |
232 | { | |
233 | char buf[128]; | |
234 | int fd = 0; | |
235 | int ret = -1; | |
236 | ||
237 | if (!annex) | |
238 | return 0; | |
239 | ||
5472f405 | 240 | sprintf (buf, "/proc/%ld/fd/%s", ptid_get_lwp (current_ptid), annex); |
a13e2c95 UW |
241 | fd = open (buf, writebuf? O_WRONLY : O_RDONLY); |
242 | if (fd <= 0) | |
243 | return -1; | |
244 | ||
245 | if (offset != 0 | |
246 | && lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset) | |
247 | { | |
248 | close (fd); | |
374c1d38 | 249 | return 0; |
a13e2c95 UW |
250 | } |
251 | ||
252 | if (writebuf) | |
253 | ret = write (fd, writebuf, (size_t) len); | |
254 | else if (readbuf) | |
255 | ret = read (fd, readbuf, (size_t) len); | |
256 | ||
257 | close (fd); | |
258 | return ret; | |
259 | } | |
260 | ||
261 | ||
262 | /* Start an inferior process and returns its pid. | |
263 | ALLARGS is a vector of program-name and args. */ | |
264 | static int | |
265 | spu_create_inferior (char *program, char **allargs) | |
266 | { | |
267 | int pid; | |
95954743 | 268 | ptid_t ptid; |
3aee8918 | 269 | struct process_info *proc; |
a13e2c95 UW |
270 | |
271 | pid = fork (); | |
272 | if (pid < 0) | |
273 | perror_with_name ("fork"); | |
274 | ||
275 | if (pid == 0) | |
276 | { | |
277 | ptrace (PTRACE_TRACEME, 0, 0, 0); | |
278 | ||
279 | setpgid (0, 0); | |
280 | ||
2b876972 DJ |
281 | execv (program, allargs); |
282 | if (errno == ENOENT) | |
283 | execvp (program, allargs); | |
a13e2c95 UW |
284 | |
285 | fprintf (stderr, "Cannot exec %s: %s.\n", program, | |
286 | strerror (errno)); | |
287 | fflush (stderr); | |
288 | _exit (0177); | |
289 | } | |
290 | ||
3aee8918 PA |
291 | proc = add_process (pid, 0); |
292 | proc->tdesc = tdesc_spu; | |
95954743 PA |
293 | |
294 | ptid = ptid_build (pid, pid, 0); | |
295 | add_thread (ptid, NULL); | |
a13e2c95 UW |
296 | return pid; |
297 | } | |
298 | ||
299 | /* Attach to an inferior process. */ | |
300 | int | |
301 | spu_attach (unsigned long pid) | |
302 | { | |
95954743 | 303 | ptid_t ptid; |
3aee8918 | 304 | struct process_info *proc; |
95954743 | 305 | |
a13e2c95 UW |
306 | if (ptrace (PTRACE_ATTACH, pid, 0, 0) != 0) |
307 | { | |
308 | fprintf (stderr, "Cannot attach to process %ld: %s (%d)\n", pid, | |
309 | strerror (errno), errno); | |
310 | fflush (stderr); | |
311 | _exit (0177); | |
312 | } | |
313 | ||
3aee8918 PA |
314 | proc = add_process (pid, 1); |
315 | proc->tdesc = tdesc_spu; | |
95954743 PA |
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; | |
368 | ||
369 | do { | |
5472f405 | 370 | ret = waitpid (pid, &status, 0); |
444d6139 PA |
371 | if (WIFEXITED (status) || WIFSIGNALED (status)) |
372 | break; | |
373 | } while (ret != -1 || errno != ECHILD); | |
374 | } | |
375 | ||
a13e2c95 UW |
376 | /* Return nonzero if the given thread is still alive. */ |
377 | static int | |
95954743 | 378 | spu_thread_alive (ptid_t ptid) |
a13e2c95 | 379 | { |
5472f405 | 380 | return ptid_equal (ptid, current_ptid); |
a13e2c95 UW |
381 | } |
382 | ||
383 | /* Resume process. */ | |
384 | static void | |
2bd7c093 | 385 | spu_resume (struct thread_resume *resume_info, size_t n) |
a13e2c95 | 386 | { |
2bd7c093 | 387 | size_t i; |
a13e2c95 | 388 | |
2bd7c093 | 389 | for (i = 0; i < n; i++) |
95954743 | 390 | if (ptid_equal (resume_info[i].thread, minus_one_ptid) |
5472f405 | 391 | || ptid_equal (resume_info[i].thread, current_ptid)) |
2bd7c093 PA |
392 | break; |
393 | ||
394 | if (i == n) | |
a13e2c95 UW |
395 | return; |
396 | ||
397 | /* We don't support hardware single-stepping right now, assume | |
398 | GDB knows to use software single-stepping. */ | |
bd99dc85 | 399 | if (resume_info[i].kind == resume_step) |
a13e2c95 UW |
400 | fprintf (stderr, "Hardware single-step not supported.\n"); |
401 | ||
402 | regcache_invalidate (); | |
403 | ||
404 | errno = 0; | |
5472f405 | 405 | ptrace (PTRACE_CONT, ptid_get_lwp (current_ptid), 0, resume_info[i].sig); |
a13e2c95 UW |
406 | if (errno) |
407 | perror_with_name ("ptrace"); | |
408 | } | |
409 | ||
410 | /* Wait for process, returns status. */ | |
95954743 PA |
411 | static ptid_t |
412 | spu_wait (ptid_t ptid, struct target_waitstatus *ourstatus, int options) | |
a13e2c95 | 413 | { |
5472f405 | 414 | int pid = ptid_get_pid (ptid); |
a13e2c95 UW |
415 | int w; |
416 | int ret; | |
417 | ||
a13e2c95 UW |
418 | while (1) |
419 | { | |
5472f405 | 420 | ret = waitpid (pid, &w, WNOHANG | __WALL | __WNOTHREAD); |
a13e2c95 UW |
421 | |
422 | if (ret == -1) | |
423 | { | |
424 | if (errno != ECHILD) | |
425 | perror_with_name ("waitpid"); | |
426 | } | |
427 | else if (ret > 0) | |
428 | break; | |
429 | ||
430 | usleep (1000); | |
431 | } | |
432 | ||
433 | /* On the first wait, continue running the inferior until we are | |
434 | blocked inside an spu_run system call. */ | |
435 | if (!server_waiting) | |
436 | { | |
437 | int fd; | |
438 | CORE_ADDR addr; | |
439 | ||
440 | while (!parse_spufs_run (&fd, &addr)) | |
441 | { | |
5472f405 UW |
442 | ptrace (PT_SYSCALL, pid, (PTRACE_TYPE_ARG3) 0, 0); |
443 | waitpid (pid, NULL, __WALL | __WNOTHREAD); | |
a13e2c95 UW |
444 | } |
445 | } | |
446 | ||
a13e2c95 UW |
447 | if (WIFEXITED (w)) |
448 | { | |
449 | fprintf (stderr, "\nChild exited with retcode = %x \n", WEXITSTATUS (w)); | |
5b1c542e PA |
450 | ourstatus->kind = TARGET_WAITKIND_EXITED; |
451 | ourstatus->value.integer = WEXITSTATUS (w); | |
a13e2c95 | 452 | clear_inferiors (); |
95954743 | 453 | return pid_to_ptid (ret); |
a13e2c95 UW |
454 | } |
455 | else if (!WIFSTOPPED (w)) | |
456 | { | |
457 | fprintf (stderr, "\nChild terminated with signal = %x \n", WTERMSIG (w)); | |
5b1c542e | 458 | ourstatus->kind = TARGET_WAITKIND_SIGNALLED; |
2ea28649 | 459 | ourstatus->value.sig = gdb_signal_from_host (WTERMSIG (w)); |
a13e2c95 | 460 | clear_inferiors (); |
95954743 | 461 | return pid_to_ptid (ret); |
a13e2c95 UW |
462 | } |
463 | ||
464 | /* After attach, we may have received a SIGSTOP. Do not return this | |
465 | as signal to GDB, or else it will try to continue with SIGSTOP ... */ | |
466 | if (!server_waiting) | |
467 | { | |
5b1c542e | 468 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
a493e3e2 | 469 | ourstatus->value.sig = GDB_SIGNAL_0; |
95954743 | 470 | return ptid_build (ret, ret, 0); |
a13e2c95 UW |
471 | } |
472 | ||
5b1c542e | 473 | ourstatus->kind = TARGET_WAITKIND_STOPPED; |
2ea28649 | 474 | ourstatus->value.sig = gdb_signal_from_host (WSTOPSIG (w)); |
95954743 | 475 | return ptid_build (ret, ret, 0); |
a13e2c95 UW |
476 | } |
477 | ||
478 | /* Fetch inferior registers. */ | |
479 | static void | |
85492558 | 480 | spu_fetch_registers (struct regcache *regcache, int regno) |
a13e2c95 UW |
481 | { |
482 | int fd; | |
483 | CORE_ADDR addr; | |
484 | ||
a13e2c95 UW |
485 | /* We must be stopped on a spu_run system call. */ |
486 | if (!parse_spufs_run (&fd, &addr)) | |
487 | return; | |
488 | ||
489 | /* The ID register holds the spufs file handle. */ | |
490 | if (regno == -1 || regno == SPU_ID_REGNUM) | |
85492558 | 491 | supply_register (regcache, SPU_ID_REGNUM, (char *)&fd); |
a13e2c95 UW |
492 | |
493 | /* The NPC register is found at ADDR. */ | |
494 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
495 | { | |
496 | char buf[4]; | |
497 | if (fetch_ppc_memory (addr, buf, 4) == 0) | |
85492558 | 498 | supply_register (regcache, SPU_PC_REGNUM, buf); |
a13e2c95 UW |
499 | } |
500 | ||
501 | /* The GPRs are found in the "regs" spufs file. */ | |
502 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS)) | |
503 | { | |
504 | unsigned char buf[16*SPU_NUM_CORE_REGS]; | |
505 | char annex[32]; | |
506 | int i; | |
507 | ||
508 | sprintf (annex, "%d/regs", fd); | |
509 | if (spu_proc_xfer_spu (annex, buf, NULL, 0, sizeof buf) == sizeof buf) | |
510 | for (i = 0; i < SPU_NUM_CORE_REGS; i++) | |
85492558 | 511 | supply_register (regcache, i, buf + i*16); |
a13e2c95 UW |
512 | } |
513 | } | |
514 | ||
515 | /* Store inferior registers. */ | |
516 | static void | |
85492558 | 517 | spu_store_registers (struct regcache *regcache, int regno) |
a13e2c95 UW |
518 | { |
519 | int fd; | |
520 | CORE_ADDR addr; | |
521 | ||
522 | /* ??? Some callers use 0 to mean all registers. */ | |
523 | if (regno == 0) | |
524 | regno = -1; | |
525 | ||
526 | /* We must be stopped on a spu_run system call. */ | |
527 | if (!parse_spufs_run (&fd, &addr)) | |
528 | return; | |
529 | ||
530 | /* The NPC register is found at ADDR. */ | |
531 | if (regno == -1 || regno == SPU_PC_REGNUM) | |
532 | { | |
533 | char buf[4]; | |
85492558 | 534 | collect_register (regcache, SPU_PC_REGNUM, buf); |
a13e2c95 UW |
535 | store_ppc_memory (addr, buf, 4); |
536 | } | |
537 | ||
538 | /* The GPRs are found in the "regs" spufs file. */ | |
539 | if (regno == -1 || (regno >= 0 && regno < SPU_NUM_CORE_REGS)) | |
540 | { | |
541 | unsigned char buf[16*SPU_NUM_CORE_REGS]; | |
542 | char annex[32]; | |
543 | int i; | |
544 | ||
545 | for (i = 0; i < SPU_NUM_CORE_REGS; i++) | |
85492558 | 546 | collect_register (regcache, i, buf + i*16); |
a13e2c95 UW |
547 | |
548 | sprintf (annex, "%d/regs", fd); | |
549 | spu_proc_xfer_spu (annex, NULL, buf, 0, sizeof buf); | |
550 | } | |
551 | } | |
552 | ||
553 | /* Copy LEN bytes from inferior's memory starting at MEMADDR | |
554 | to debugger memory starting at MYADDR. */ | |
555 | static int | |
556 | spu_read_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len) | |
557 | { | |
558 | int fd, ret; | |
559 | CORE_ADDR addr; | |
d2ed6730 UW |
560 | char annex[32], lslr_annex[32], buf[32]; |
561 | CORE_ADDR lslr; | |
a13e2c95 UW |
562 | |
563 | /* We must be stopped on a spu_run system call. */ | |
564 | if (!parse_spufs_run (&fd, &addr)) | |
565 | return 0; | |
566 | ||
567 | /* Use the "mem" spufs file to access SPU local store. */ | |
568 | sprintf (annex, "%d/mem", fd); | |
569 | ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr, len); | |
d2ed6730 UW |
570 | if (ret > 0) |
571 | return ret == len ? 0 : EIO; | |
572 | ||
573 | /* SPU local store access wraps the address around at the | |
574 | local store limit. We emulate this here. To avoid needing | |
575 | an extra access to retrieve the LSLR, we only do that after | |
576 | trying the original address first, and getting end-of-file. */ | |
577 | sprintf (lslr_annex, "%d/lslr", fd); | |
578 | memset (buf, 0, sizeof buf); | |
579 | if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL, | |
580 | 0, sizeof buf) <= 0) | |
581 | return ret; | |
582 | ||
583 | lslr = strtoul (buf, NULL, 16); | |
584 | ret = spu_proc_xfer_spu (annex, myaddr, NULL, memaddr & lslr, len); | |
585 | ||
a13e2c95 UW |
586 | return ret == len ? 0 : EIO; |
587 | } | |
588 | ||
589 | /* Copy LEN bytes of data from debugger memory at MYADDR | |
590 | to inferior's memory at MEMADDR. | |
591 | On failure (cannot write the inferior) | |
592 | returns the value of errno. */ | |
593 | static int | |
594 | spu_write_memory (CORE_ADDR memaddr, const unsigned char *myaddr, int len) | |
595 | { | |
596 | int fd, ret; | |
597 | CORE_ADDR addr; | |
d2ed6730 UW |
598 | char annex[32], lslr_annex[32], buf[32]; |
599 | CORE_ADDR lslr; | |
a13e2c95 UW |
600 | |
601 | /* We must be stopped on a spu_run system call. */ | |
602 | if (!parse_spufs_run (&fd, &addr)) | |
603 | return 0; | |
604 | ||
605 | /* Use the "mem" spufs file to access SPU local store. */ | |
606 | sprintf (annex, "%d/mem", fd); | |
607 | ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr, len); | |
d2ed6730 UW |
608 | if (ret > 0) |
609 | return ret == len ? 0 : EIO; | |
610 | ||
611 | /* SPU local store access wraps the address around at the | |
612 | local store limit. We emulate this here. To avoid needing | |
613 | an extra access to retrieve the LSLR, we only do that after | |
614 | trying the original address first, and getting end-of-file. */ | |
615 | sprintf (lslr_annex, "%d/lslr", fd); | |
616 | memset (buf, 0, sizeof buf); | |
617 | if (spu_proc_xfer_spu (lslr_annex, (unsigned char *)buf, NULL, | |
618 | 0, sizeof buf) <= 0) | |
619 | return ret; | |
620 | ||
621 | lslr = strtoul (buf, NULL, 16); | |
622 | ret = spu_proc_xfer_spu (annex, NULL, myaddr, memaddr & lslr, len); | |
623 | ||
a13e2c95 UW |
624 | return ret == len ? 0 : EIO; |
625 | } | |
626 | ||
627 | /* Look up special symbols -- unneded here. */ | |
628 | static void | |
629 | spu_look_up_symbols (void) | |
630 | { | |
631 | } | |
632 | ||
633 | /* Send signal to inferior. */ | |
634 | static void | |
ef57601b | 635 | spu_request_interrupt (void) |
a13e2c95 | 636 | { |
5472f405 | 637 | syscall (SYS_tkill, ptid_get_lwp (current_ptid), SIGINT); |
a13e2c95 UW |
638 | } |
639 | ||
a13e2c95 UW |
640 | static struct target_ops spu_target_ops = { |
641 | spu_create_inferior, | |
642 | spu_attach, | |
643 | spu_kill, | |
644 | spu_detach, | |
505106cd | 645 | spu_mourn, |
444d6139 | 646 | spu_join, |
a13e2c95 UW |
647 | spu_thread_alive, |
648 | spu_resume, | |
649 | spu_wait, | |
650 | spu_fetch_registers, | |
651 | spu_store_registers, | |
90d74c30 | 652 | NULL, /* prepare_to_access_memory */ |
0146f85b | 653 | NULL, /* done_accessing_memory */ |
a13e2c95 UW |
654 | spu_read_memory, |
655 | spu_write_memory, | |
656 | spu_look_up_symbols, | |
ef57601b | 657 | spu_request_interrupt, |
a13e2c95 | 658 | NULL, |
ab39bf24 UW |
659 | NULL, |
660 | NULL, | |
661 | NULL, | |
662 | NULL, | |
663 | NULL, | |
664 | NULL, | |
0e7f50da | 665 | spu_proc_xfer_spu, |
59a016f0 | 666 | hostio_last_error_from_errno, |
a13e2c95 UW |
667 | }; |
668 | ||
669 | void | |
670 | initialize_low (void) | |
671 | { | |
672 | static const unsigned char breakpoint[] = { 0x00, 0x00, 0x3f, 0xff }; | |
673 | ||
674 | set_target_ops (&spu_target_ops); | |
675 | set_breakpoint_data (breakpoint, sizeof breakpoint); | |
d05b4ac3 | 676 | init_registers_spu (); |
a13e2c95 | 677 | } |