Commit | Line | Data |
---|---|---|
0a30fbc4 | 1 | /* Register support routines for the remote server for GDB. |
61baf725 | 2 | Copyright (C) 2001-2017 Free Software Foundation, Inc. |
0a30fbc4 DJ |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
0a30fbc4 DJ |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
0a30fbc4 DJ |
18 | |
19 | #include "server.h" | |
20 | #include "regdef.h" | |
623b6bdf | 21 | #include "gdbthread.h" |
3aee8918 | 22 | #include "tdesc.h" |
9c3d6531 | 23 | #include "rsp-low.h" |
fa593d66 PA |
24 | #ifndef IN_PROCESS_AGENT |
25 | ||
442ea881 PA |
26 | struct regcache * |
27 | get_thread_regcache (struct thread_info *thread, int fetch) | |
c04a1aa8 | 28 | { |
442ea881 | 29 | struct regcache *regcache; |
c04a1aa8 | 30 | |
6afd337d | 31 | regcache = thread_regcache_data (thread); |
c04a1aa8 | 32 | |
3aee8918 PA |
33 | /* Threads' regcaches are created lazily, because biarch targets add |
34 | the main thread/lwp before seeing it stop for the first time, and | |
35 | it is only after the target sees the thread stop for the first | |
36 | time that the target has a chance of determining the process's | |
37 | architecture. IOW, when we first add the process's main thread | |
38 | we don't know which architecture/tdesc its regcache should | |
39 | have. */ | |
c04a1aa8 | 40 | if (regcache == NULL) |
3aee8918 PA |
41 | { |
42 | struct process_info *proc = get_thread_process (thread); | |
43 | ||
38e08fca | 44 | gdb_assert (proc->tdesc != NULL); |
3aee8918 PA |
45 | |
46 | regcache = new_register_cache (proc->tdesc); | |
6afd337d | 47 | set_thread_regcache_data (thread, regcache); |
3aee8918 | 48 | } |
c04a1aa8 | 49 | |
0d62e5e8 DJ |
50 | if (fetch && regcache->registers_valid == 0) |
51 | { | |
0bfdf32f | 52 | struct thread_info *saved_thread = current_thread; |
442ea881 | 53 | |
0bfdf32f | 54 | current_thread = thread; |
098dbe61 | 55 | /* Invalidate all registers, to prevent stale left-overs. */ |
c4dfafab SDJ |
56 | memset (regcache->register_status, REG_UNAVAILABLE, |
57 | regcache->tdesc->reg_defs.size ()); | |
442ea881 | 58 | fetch_inferior_registers (regcache, -1); |
0bfdf32f | 59 | current_thread = saved_thread; |
0d62e5e8 DJ |
60 | regcache->registers_valid = 1; |
61 | } | |
62 | ||
c04a1aa8 DJ |
63 | return regcache; |
64 | } | |
65 | ||
361c8ade GB |
66 | /* See common/common-regcache.h. */ |
67 | ||
68 | struct regcache * | |
69 | get_thread_regcache_for_ptid (ptid_t ptid) | |
70 | { | |
71 | return get_thread_regcache (find_thread_ptid (ptid), 1); | |
72 | } | |
73 | ||
0d62e5e8 | 74 | void |
3aee8918 | 75 | regcache_invalidate_thread (struct thread_info *thread) |
0d62e5e8 | 76 | { |
442ea881 | 77 | struct regcache *regcache; |
0d62e5e8 | 78 | |
6afd337d | 79 | regcache = thread_regcache_data (thread); |
0d62e5e8 | 80 | |
45ba0d02 PA |
81 | if (regcache == NULL) |
82 | return; | |
83 | ||
0d62e5e8 DJ |
84 | if (regcache->registers_valid) |
85 | { | |
0bfdf32f | 86 | struct thread_info *saved_thread = current_thread; |
0d62e5e8 | 87 | |
0bfdf32f | 88 | current_thread = thread; |
442ea881 | 89 | store_inferior_registers (regcache, -1); |
0bfdf32f | 90 | current_thread = saved_thread; |
0d62e5e8 DJ |
91 | } |
92 | ||
93 | regcache->registers_valid = 0; | |
94 | } | |
95 | ||
3aee8918 | 96 | static int |
9c80ecd6 | 97 | regcache_invalidate_one (thread_info *thread, void *pid_p) |
3aee8918 | 98 | { |
3aee8918 PA |
99 | int pid = *(int *) pid_p; |
100 | ||
101 | /* Only invalidate the regcaches of threads of this process. */ | |
9c80ecd6 | 102 | if (thread->id.pid () == pid) |
3aee8918 PA |
103 | regcache_invalidate_thread (thread); |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
80d82c19 JB |
108 | /* See regcache.h. */ |
109 | ||
110 | void | |
111 | regcache_invalidate_pid (int pid) | |
112 | { | |
113 | find_inferior (&all_threads, regcache_invalidate_one, &pid); | |
114 | } | |
115 | ||
116 | /* See regcache.h. */ | |
117 | ||
0d62e5e8 | 118 | void |
442ea881 | 119 | regcache_invalidate (void) |
0d62e5e8 | 120 | { |
3aee8918 | 121 | /* Only update the threads of the current process. */ |
9c80ecd6 | 122 | int pid = current_thread->id.pid (); |
3aee8918 | 123 | |
80d82c19 | 124 | regcache_invalidate_pid (pid); |
0d62e5e8 DJ |
125 | } |
126 | ||
fa593d66 PA |
127 | #endif |
128 | ||
219f2f23 | 129 | struct regcache * |
3aee8918 PA |
130 | init_register_cache (struct regcache *regcache, |
131 | const struct target_desc *tdesc, | |
132 | unsigned char *regbuf) | |
219f2f23 PA |
133 | { |
134 | if (regbuf == NULL) | |
135 | { | |
87f6c4e3 | 136 | #ifndef IN_PROCESS_AGENT |
219f2f23 PA |
137 | /* Make sure to zero-initialize the register cache when it is |
138 | created, in case there are registers the target never | |
139 | fetches. This way they'll read as zero instead of | |
140 | garbage. */ | |
3aee8918 | 141 | regcache->tdesc = tdesc; |
224c3ddb SM |
142 | regcache->registers |
143 | = (unsigned char *) xcalloc (1, tdesc->registers_size); | |
219f2f23 | 144 | regcache->registers_owned = 1; |
224c3ddb | 145 | regcache->register_status |
c4dfafab SDJ |
146 | = (unsigned char *) xmalloc (tdesc->reg_defs.size ()); |
147 | memset ((void *) regcache->register_status, REG_UNAVAILABLE, | |
148 | tdesc->reg_defs.size ()); | |
fa593d66 | 149 | #else |
38e08fca | 150 | gdb_assert_not_reached ("can't allocate memory from the heap"); |
fa593d66 | 151 | #endif |
87f6c4e3 GB |
152 | } |
153 | else | |
219f2f23 | 154 | { |
3aee8918 | 155 | regcache->tdesc = tdesc; |
219f2f23 PA |
156 | regcache->registers = regbuf; |
157 | regcache->registers_owned = 0; | |
1c79eb8a PA |
158 | #ifndef IN_PROCESS_AGENT |
159 | regcache->register_status = NULL; | |
160 | #endif | |
219f2f23 PA |
161 | } |
162 | ||
163 | regcache->registers_valid = 0; | |
164 | ||
165 | return regcache; | |
166 | } | |
167 | ||
fa593d66 PA |
168 | #ifndef IN_PROCESS_AGENT |
169 | ||
442ea881 | 170 | struct regcache * |
3aee8918 | 171 | new_register_cache (const struct target_desc *tdesc) |
c04a1aa8 | 172 | { |
8d749320 | 173 | struct regcache *regcache = XCNEW (struct regcache); |
c04a1aa8 | 174 | |
3aee8918 | 175 | gdb_assert (tdesc->registers_size != 0); |
5822d809 | 176 | |
3aee8918 | 177 | return init_register_cache (regcache, tdesc, NULL); |
c04a1aa8 DJ |
178 | } |
179 | ||
180 | void | |
442ea881 | 181 | free_register_cache (struct regcache *regcache) |
c04a1aa8 | 182 | { |
5822d809 PA |
183 | if (regcache) |
184 | { | |
fa593d66 PA |
185 | if (regcache->registers_owned) |
186 | free (regcache->registers); | |
1c79eb8a | 187 | free (regcache->register_status); |
5822d809 PA |
188 | free (regcache); |
189 | } | |
c04a1aa8 DJ |
190 | } |
191 | ||
fa593d66 PA |
192 | #endif |
193 | ||
219f2f23 PA |
194 | void |
195 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
196 | { | |
3aee8918 PA |
197 | gdb_assert (src != NULL && dst != NULL); |
198 | gdb_assert (src->tdesc == dst->tdesc); | |
199 | gdb_assert (src != dst); | |
200 | ||
201 | memcpy (dst->registers, src->registers, src->tdesc->registers_size); | |
1c79eb8a PA |
202 | #ifndef IN_PROCESS_AGENT |
203 | if (dst->register_status != NULL && src->register_status != NULL) | |
3aee8918 | 204 | memcpy (dst->register_status, src->register_status, |
c4dfafab | 205 | src->tdesc->reg_defs.size ()); |
1c79eb8a | 206 | #endif |
219f2f23 PA |
207 | dst->registers_valid = src->registers_valid; |
208 | } | |
209 | ||
219f2f23 | 210 | |
fa593d66 PA |
211 | #ifndef IN_PROCESS_AGENT |
212 | ||
0a30fbc4 | 213 | void |
442ea881 | 214 | registers_to_string (struct regcache *regcache, char *buf) |
0a30fbc4 | 215 | { |
442ea881 | 216 | unsigned char *registers = regcache->registers; |
3aee8918 | 217 | const struct target_desc *tdesc = regcache->tdesc; |
c04a1aa8 | 218 | |
c4dfafab | 219 | for (int i = 0; i < tdesc->reg_defs.size (); ++i) |
1c79eb8a | 220 | { |
c4dfafab SDJ |
221 | struct reg *reg = tdesc->reg_defs[i]; |
222 | ||
1c79eb8a PA |
223 | if (regcache->register_status[i] == REG_VALID) |
224 | { | |
e9371aff | 225 | bin2hex (registers, buf, register_size (tdesc, i)); |
3aee8918 | 226 | buf += register_size (tdesc, i) * 2; |
1c79eb8a PA |
227 | } |
228 | else | |
229 | { | |
3aee8918 PA |
230 | memset (buf, 'x', register_size (tdesc, i) * 2); |
231 | buf += register_size (tdesc, i) * 2; | |
1c79eb8a | 232 | } |
3aee8918 | 233 | registers += register_size (tdesc, i); |
1c79eb8a PA |
234 | } |
235 | *buf = '\0'; | |
0a30fbc4 DJ |
236 | } |
237 | ||
238 | void | |
442ea881 | 239 | registers_from_string (struct regcache *regcache, char *buf) |
0a30fbc4 DJ |
240 | { |
241 | int len = strlen (buf); | |
442ea881 | 242 | unsigned char *registers = regcache->registers; |
3aee8918 | 243 | const struct target_desc *tdesc = regcache->tdesc; |
0a30fbc4 | 244 | |
3aee8918 | 245 | if (len != tdesc->registers_size * 2) |
0a30fbc4 | 246 | { |
1b3f6016 | 247 | warning ("Wrong sized register packet (expected %d bytes, got %d)", |
3aee8918 PA |
248 | 2 * tdesc->registers_size, len); |
249 | if (len > tdesc->registers_size * 2) | |
250 | len = tdesc->registers_size * 2; | |
0a30fbc4 | 251 | } |
a7191e8b | 252 | hex2bin (buf, registers, len / 2); |
0a30fbc4 DJ |
253 | } |
254 | ||
0a30fbc4 | 255 | int |
3aee8918 | 256 | find_regno (const struct target_desc *tdesc, const char *name) |
0a30fbc4 | 257 | { |
c4dfafab SDJ |
258 | for (int i = 0; i < tdesc->reg_defs.size (); ++i) |
259 | { | |
260 | struct reg *reg = tdesc->reg_defs[i]; | |
0a30fbc4 | 261 | |
c4dfafab SDJ |
262 | if (strcmp (name, reg->name) == 0) |
263 | return i; | |
264 | } | |
38e08fca GB |
265 | internal_error (__FILE__, __LINE__, "Unknown register %s requested", |
266 | name); | |
0a30fbc4 DJ |
267 | } |
268 | ||
f7000548 YQ |
269 | #endif |
270 | ||
0a30fbc4 | 271 | struct reg * |
3aee8918 | 272 | find_register_by_number (const struct target_desc *tdesc, int n) |
0a30fbc4 | 273 | { |
c4dfafab | 274 | return tdesc->reg_defs[n]; |
0a30fbc4 DJ |
275 | } |
276 | ||
3aee8918 PA |
277 | #ifndef IN_PROCESS_AGENT |
278 | static void | |
279 | free_register_cache_thread (struct thread_info *thread) | |
280 | { | |
6afd337d | 281 | struct regcache *regcache = thread_regcache_data (thread); |
3aee8918 PA |
282 | |
283 | if (regcache != NULL) | |
284 | { | |
285 | regcache_invalidate_thread (thread); | |
286 | free_register_cache (regcache); | |
6afd337d | 287 | set_thread_regcache_data (thread, NULL); |
3aee8918 PA |
288 | } |
289 | } | |
290 | ||
3aee8918 PA |
291 | void |
292 | regcache_release (void) | |
293 | { | |
294 | /* Flush and release all pre-existing register caches. */ | |
9c80ecd6 | 295 | for_each_inferior (&all_threads, free_register_cache_thread); |
3aee8918 PA |
296 | } |
297 | #endif | |
298 | ||
0a30fbc4 | 299 | int |
3aee8918 | 300 | register_cache_size (const struct target_desc *tdesc) |
0a30fbc4 | 301 | { |
3aee8918 PA |
302 | return tdesc->registers_size; |
303 | } | |
304 | ||
305 | int | |
306 | register_size (const struct target_desc *tdesc, int n) | |
307 | { | |
f7000548 | 308 | return find_register_by_number (tdesc, n)->size / 8; |
0a30fbc4 DJ |
309 | } |
310 | ||
8d689ee5 YQ |
311 | /* See common/common-regcache.h. */ |
312 | ||
313 | int | |
314 | regcache_register_size (const struct regcache *regcache, int n) | |
315 | { | |
316 | return register_size (regcache->tdesc, n); | |
317 | } | |
318 | ||
f450004a | 319 | static unsigned char * |
442ea881 | 320 | register_data (struct regcache *regcache, int n, int fetch) |
0a30fbc4 | 321 | { |
f7000548 YQ |
322 | return (regcache->registers |
323 | + find_register_by_number (regcache->tdesc, n)->offset / 8); | |
0a30fbc4 DJ |
324 | } |
325 | ||
1c79eb8a PA |
326 | /* Supply register N, whose contents are stored in BUF, to REGCACHE. |
327 | If BUF is NULL, the register's value is recorded as | |
328 | unavailable. */ | |
329 | ||
58caa3dc | 330 | void |
442ea881 | 331 | supply_register (struct regcache *regcache, int n, const void *buf) |
58caa3dc | 332 | { |
3327ccf7 | 333 | if (buf) |
1c79eb8a | 334 | { |
3aee8918 PA |
335 | memcpy (register_data (regcache, n, 0), buf, |
336 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
337 | #ifndef IN_PROCESS_AGENT |
338 | if (regcache->register_status != NULL) | |
339 | regcache->register_status[n] = REG_VALID; | |
340 | #endif | |
341 | } | |
3327ccf7 | 342 | else |
1c79eb8a | 343 | { |
3aee8918 PA |
344 | memset (register_data (regcache, n, 0), 0, |
345 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
346 | #ifndef IN_PROCESS_AGENT |
347 | if (regcache->register_status != NULL) | |
348 | regcache->register_status[n] = REG_UNAVAILABLE; | |
349 | #endif | |
350 | } | |
58caa3dc DJ |
351 | } |
352 | ||
1c79eb8a PA |
353 | /* Supply register N with value zero to REGCACHE. */ |
354 | ||
355 | void | |
356 | supply_register_zeroed (struct regcache *regcache, int n) | |
357 | { | |
3aee8918 PA |
358 | memset (register_data (regcache, n, 0), 0, |
359 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
360 | #ifndef IN_PROCESS_AGENT |
361 | if (regcache->register_status != NULL) | |
362 | regcache->register_status[n] = REG_VALID; | |
363 | #endif | |
364 | } | |
365 | ||
366 | /* Supply the whole register set whose contents are stored in BUF, to | |
367 | REGCACHE. If BUF is NULL, all the registers' values are recorded | |
368 | as unavailable. */ | |
369 | ||
219f2f23 PA |
370 | void |
371 | supply_regblock (struct regcache *regcache, const void *buf) | |
372 | { | |
373 | if (buf) | |
1c79eb8a | 374 | { |
3aee8918 PA |
375 | const struct target_desc *tdesc = regcache->tdesc; |
376 | ||
377 | memcpy (regcache->registers, buf, tdesc->registers_size); | |
1c79eb8a PA |
378 | #ifndef IN_PROCESS_AGENT |
379 | { | |
380 | int i; | |
381 | ||
c4dfafab | 382 | for (i = 0; i < tdesc->reg_defs.size (); i++) |
1c79eb8a PA |
383 | regcache->register_status[i] = REG_VALID; |
384 | } | |
385 | #endif | |
386 | } | |
219f2f23 | 387 | else |
1c79eb8a | 388 | { |
3aee8918 PA |
389 | const struct target_desc *tdesc = regcache->tdesc; |
390 | ||
391 | memset (regcache->registers, 0, tdesc->registers_size); | |
1c79eb8a PA |
392 | #ifndef IN_PROCESS_AGENT |
393 | { | |
394 | int i; | |
395 | ||
c4dfafab | 396 | for (i = 0; i < tdesc->reg_defs.size (); i++) |
1c79eb8a PA |
397 | regcache->register_status[i] = REG_UNAVAILABLE; |
398 | } | |
399 | #endif | |
400 | } | |
219f2f23 PA |
401 | } |
402 | ||
fa593d66 PA |
403 | #ifndef IN_PROCESS_AGENT |
404 | ||
58caa3dc | 405 | void |
442ea881 PA |
406 | supply_register_by_name (struct regcache *regcache, |
407 | const char *name, const void *buf) | |
58caa3dc | 408 | { |
3aee8918 | 409 | supply_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc DJ |
410 | } |
411 | ||
fa593d66 PA |
412 | #endif |
413 | ||
58caa3dc | 414 | void |
442ea881 | 415 | collect_register (struct regcache *regcache, int n, void *buf) |
58caa3dc | 416 | { |
3aee8918 PA |
417 | memcpy (buf, register_data (regcache, n, 1), |
418 | register_size (regcache->tdesc, n)); | |
0d62e5e8 DJ |
419 | } |
420 | ||
68ce2059 AT |
421 | enum register_status |
422 | regcache_raw_read_unsigned (struct regcache *regcache, int regnum, | |
423 | ULONGEST *val) | |
424 | { | |
425 | int size; | |
426 | ||
427 | gdb_assert (regcache != NULL); | |
f7000548 | 428 | gdb_assert (regnum >= 0 |
c4dfafab | 429 | && regnum < regcache->tdesc->reg_defs.size ()); |
68ce2059 AT |
430 | |
431 | size = register_size (regcache->tdesc, regnum); | |
432 | ||
433 | if (size > (int) sizeof (ULONGEST)) | |
434 | error (_("That operation is not available on integers of more than" | |
435 | "%d bytes."), | |
436 | (int) sizeof (ULONGEST)); | |
437 | ||
9f6a71b4 | 438 | *val = 0; |
68ce2059 AT |
439 | collect_register (regcache, regnum, val); |
440 | ||
441 | return REG_VALID; | |
442 | } | |
443 | ||
fa593d66 PA |
444 | #ifndef IN_PROCESS_AGENT |
445 | ||
0d62e5e8 | 446 | void |
442ea881 | 447 | collect_register_as_string (struct regcache *regcache, int n, char *buf) |
0d62e5e8 | 448 | { |
e9371aff TT |
449 | bin2hex (register_data (regcache, n, 1), buf, |
450 | register_size (regcache->tdesc, n)); | |
58caa3dc DJ |
451 | } |
452 | ||
453 | void | |
442ea881 PA |
454 | collect_register_by_name (struct regcache *regcache, |
455 | const char *name, void *buf) | |
58caa3dc | 456 | { |
3aee8918 | 457 | collect_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc | 458 | } |
219f2f23 PA |
459 | |
460 | /* Special handling for register PC. */ | |
461 | ||
462 | CORE_ADDR | |
463 | regcache_read_pc (struct regcache *regcache) | |
464 | { | |
465 | CORE_ADDR pc_val; | |
466 | ||
467 | if (the_target->read_pc) | |
468 | pc_val = the_target->read_pc (regcache); | |
469 | else | |
470 | internal_error (__FILE__, __LINE__, | |
471 | "regcache_read_pc: Unable to find PC"); | |
472 | ||
473 | return pc_val; | |
474 | } | |
475 | ||
476 | void | |
477 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) | |
478 | { | |
479 | if (the_target->write_pc) | |
480 | the_target->write_pc (regcache, pc); | |
481 | else | |
482 | internal_error (__FILE__, __LINE__, | |
483 | "regcache_write_pc: Unable to update PC"); | |
484 | } | |
fa593d66 PA |
485 | |
486 | #endif |