Commit | Line | Data |
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0a30fbc4 | 1 | /* Register support routines for the remote server for GDB. |
ecd75fc8 | 2 | Copyright (C) 2001-2014 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 | |
442ea881 | 31 | regcache = (struct regcache *) inferior_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); | |
47 | set_inferior_regcache_data (thread, regcache); | |
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; |
442ea881 | 55 | fetch_inferior_registers (regcache, -1); |
0bfdf32f | 56 | current_thread = saved_thread; |
0d62e5e8 DJ |
57 | regcache->registers_valid = 1; |
58 | } | |
59 | ||
c04a1aa8 DJ |
60 | return regcache; |
61 | } | |
62 | ||
361c8ade GB |
63 | /* See common/common-regcache.h. */ |
64 | ||
65 | struct regcache * | |
66 | get_thread_regcache_for_ptid (ptid_t ptid) | |
67 | { | |
68 | return get_thread_regcache (find_thread_ptid (ptid), 1); | |
69 | } | |
70 | ||
0d62e5e8 | 71 | void |
3aee8918 | 72 | regcache_invalidate_thread (struct thread_info *thread) |
0d62e5e8 | 73 | { |
442ea881 | 74 | struct regcache *regcache; |
0d62e5e8 | 75 | |
442ea881 | 76 | regcache = (struct regcache *) inferior_regcache_data (thread); |
0d62e5e8 | 77 | |
45ba0d02 PA |
78 | if (regcache == NULL) |
79 | return; | |
80 | ||
0d62e5e8 DJ |
81 | if (regcache->registers_valid) |
82 | { | |
0bfdf32f | 83 | struct thread_info *saved_thread = current_thread; |
0d62e5e8 | 84 | |
0bfdf32f | 85 | current_thread = thread; |
442ea881 | 86 | store_inferior_registers (regcache, -1); |
0bfdf32f | 87 | current_thread = saved_thread; |
0d62e5e8 DJ |
88 | } |
89 | ||
90 | regcache->registers_valid = 0; | |
91 | } | |
92 | ||
3aee8918 PA |
93 | static int |
94 | regcache_invalidate_one (struct inferior_list_entry *entry, | |
95 | void *pid_p) | |
96 | { | |
97 | struct thread_info *thread = (struct thread_info *) entry; | |
98 | int pid = *(int *) pid_p; | |
99 | ||
100 | /* Only invalidate the regcaches of threads of this process. */ | |
101 | if (ptid_get_pid (entry->id) == pid) | |
102 | regcache_invalidate_thread (thread); | |
103 | ||
104 | return 0; | |
105 | } | |
106 | ||
0d62e5e8 | 107 | void |
442ea881 | 108 | regcache_invalidate (void) |
0d62e5e8 | 109 | { |
3aee8918 | 110 | /* Only update the threads of the current process. */ |
0bfdf32f | 111 | int pid = ptid_get_pid (current_thread->entry.id); |
3aee8918 PA |
112 | |
113 | find_inferior (&all_threads, regcache_invalidate_one, &pid); | |
0d62e5e8 DJ |
114 | } |
115 | ||
fa593d66 PA |
116 | #endif |
117 | ||
219f2f23 | 118 | struct regcache * |
3aee8918 PA |
119 | init_register_cache (struct regcache *regcache, |
120 | const struct target_desc *tdesc, | |
121 | unsigned char *regbuf) | |
219f2f23 PA |
122 | { |
123 | if (regbuf == NULL) | |
124 | { | |
87f6c4e3 | 125 | #ifndef IN_PROCESS_AGENT |
219f2f23 PA |
126 | /* Make sure to zero-initialize the register cache when it is |
127 | created, in case there are registers the target never | |
128 | fetches. This way they'll read as zero instead of | |
129 | garbage. */ | |
3aee8918 PA |
130 | regcache->tdesc = tdesc; |
131 | regcache->registers = xcalloc (1, tdesc->registers_size); | |
219f2f23 | 132 | regcache->registers_owned = 1; |
3aee8918 | 133 | regcache->register_status = xcalloc (1, tdesc->num_registers); |
1c79eb8a | 134 | gdb_assert (REG_UNAVAILABLE == 0); |
fa593d66 | 135 | #else |
38e08fca | 136 | gdb_assert_not_reached ("can't allocate memory from the heap"); |
fa593d66 | 137 | #endif |
87f6c4e3 GB |
138 | } |
139 | else | |
219f2f23 | 140 | { |
3aee8918 | 141 | regcache->tdesc = tdesc; |
219f2f23 PA |
142 | regcache->registers = regbuf; |
143 | regcache->registers_owned = 0; | |
1c79eb8a PA |
144 | #ifndef IN_PROCESS_AGENT |
145 | regcache->register_status = NULL; | |
146 | #endif | |
219f2f23 PA |
147 | } |
148 | ||
149 | regcache->registers_valid = 0; | |
150 | ||
151 | return regcache; | |
152 | } | |
153 | ||
fa593d66 PA |
154 | #ifndef IN_PROCESS_AGENT |
155 | ||
442ea881 | 156 | struct regcache * |
3aee8918 | 157 | new_register_cache (const struct target_desc *tdesc) |
c04a1aa8 | 158 | { |
442ea881 | 159 | struct regcache *regcache; |
c04a1aa8 | 160 | |
3aee8918 | 161 | gdb_assert (tdesc->registers_size != 0); |
5822d809 | 162 | |
bca929d3 | 163 | regcache = xmalloc (sizeof (*regcache)); |
3aee8918 | 164 | return init_register_cache (regcache, tdesc, NULL); |
c04a1aa8 DJ |
165 | } |
166 | ||
167 | void | |
442ea881 | 168 | free_register_cache (struct regcache *regcache) |
c04a1aa8 | 169 | { |
5822d809 PA |
170 | if (regcache) |
171 | { | |
fa593d66 PA |
172 | if (regcache->registers_owned) |
173 | free (regcache->registers); | |
1c79eb8a | 174 | free (regcache->register_status); |
5822d809 PA |
175 | free (regcache); |
176 | } | |
c04a1aa8 DJ |
177 | } |
178 | ||
fa593d66 PA |
179 | #endif |
180 | ||
219f2f23 PA |
181 | void |
182 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
183 | { | |
3aee8918 PA |
184 | gdb_assert (src != NULL && dst != NULL); |
185 | gdb_assert (src->tdesc == dst->tdesc); | |
186 | gdb_assert (src != dst); | |
187 | ||
188 | memcpy (dst->registers, src->registers, src->tdesc->registers_size); | |
1c79eb8a PA |
189 | #ifndef IN_PROCESS_AGENT |
190 | if (dst->register_status != NULL && src->register_status != NULL) | |
3aee8918 PA |
191 | memcpy (dst->register_status, src->register_status, |
192 | src->tdesc->num_registers); | |
1c79eb8a | 193 | #endif |
219f2f23 PA |
194 | dst->registers_valid = src->registers_valid; |
195 | } | |
196 | ||
219f2f23 | 197 | |
fa593d66 PA |
198 | #ifndef IN_PROCESS_AGENT |
199 | ||
0a30fbc4 | 200 | void |
442ea881 | 201 | registers_to_string (struct regcache *regcache, char *buf) |
0a30fbc4 | 202 | { |
442ea881 | 203 | unsigned char *registers = regcache->registers; |
3aee8918 | 204 | const struct target_desc *tdesc = regcache->tdesc; |
1c79eb8a | 205 | int i; |
c04a1aa8 | 206 | |
3aee8918 | 207 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
208 | { |
209 | if (regcache->register_status[i] == REG_VALID) | |
210 | { | |
e9371aff | 211 | bin2hex (registers, buf, register_size (tdesc, i)); |
3aee8918 | 212 | buf += register_size (tdesc, i) * 2; |
1c79eb8a PA |
213 | } |
214 | else | |
215 | { | |
3aee8918 PA |
216 | memset (buf, 'x', register_size (tdesc, i) * 2); |
217 | buf += register_size (tdesc, i) * 2; | |
1c79eb8a | 218 | } |
3aee8918 | 219 | registers += register_size (tdesc, i); |
1c79eb8a PA |
220 | } |
221 | *buf = '\0'; | |
0a30fbc4 DJ |
222 | } |
223 | ||
224 | void | |
442ea881 | 225 | registers_from_string (struct regcache *regcache, char *buf) |
0a30fbc4 DJ |
226 | { |
227 | int len = strlen (buf); | |
442ea881 | 228 | unsigned char *registers = regcache->registers; |
3aee8918 | 229 | const struct target_desc *tdesc = regcache->tdesc; |
0a30fbc4 | 230 | |
3aee8918 | 231 | if (len != tdesc->registers_size * 2) |
0a30fbc4 | 232 | { |
1b3f6016 | 233 | warning ("Wrong sized register packet (expected %d bytes, got %d)", |
3aee8918 PA |
234 | 2 * tdesc->registers_size, len); |
235 | if (len > tdesc->registers_size * 2) | |
236 | len = tdesc->registers_size * 2; | |
0a30fbc4 | 237 | } |
a7191e8b | 238 | hex2bin (buf, registers, len / 2); |
0a30fbc4 DJ |
239 | } |
240 | ||
241 | struct reg * | |
3aee8918 | 242 | find_register_by_name (const struct target_desc *tdesc, const char *name) |
0a30fbc4 DJ |
243 | { |
244 | int i; | |
245 | ||
3aee8918 PA |
246 | for (i = 0; i < tdesc->num_registers; i++) |
247 | if (strcmp (name, tdesc->reg_defs[i].name) == 0) | |
248 | return &tdesc->reg_defs[i]; | |
38e08fca GB |
249 | internal_error (__FILE__, __LINE__, "Unknown register %s requested", |
250 | name); | |
0a30fbc4 DJ |
251 | } |
252 | ||
253 | int | |
3aee8918 | 254 | find_regno (const struct target_desc *tdesc, const char *name) |
0a30fbc4 DJ |
255 | { |
256 | int i; | |
257 | ||
3aee8918 PA |
258 | for (i = 0; i < tdesc->num_registers; i++) |
259 | if (strcmp (name, tdesc->reg_defs[i].name) == 0) | |
0a30fbc4 | 260 | return i; |
38e08fca GB |
261 | internal_error (__FILE__, __LINE__, "Unknown register %s requested", |
262 | name); | |
0a30fbc4 DJ |
263 | } |
264 | ||
265 | struct reg * | |
3aee8918 | 266 | find_register_by_number (const struct target_desc *tdesc, int n) |
0a30fbc4 | 267 | { |
3aee8918 | 268 | return &tdesc->reg_defs[n]; |
0a30fbc4 DJ |
269 | } |
270 | ||
fa593d66 PA |
271 | #endif |
272 | ||
3aee8918 PA |
273 | #ifndef IN_PROCESS_AGENT |
274 | static void | |
275 | free_register_cache_thread (struct thread_info *thread) | |
276 | { | |
277 | struct regcache *regcache | |
278 | = (struct regcache *) inferior_regcache_data (thread); | |
279 | ||
280 | if (regcache != NULL) | |
281 | { | |
282 | regcache_invalidate_thread (thread); | |
283 | free_register_cache (regcache); | |
284 | set_inferior_regcache_data (thread, NULL); | |
285 | } | |
286 | } | |
287 | ||
288 | static void | |
289 | free_register_cache_thread_one (struct inferior_list_entry *entry) | |
290 | { | |
291 | struct thread_info *thread = (struct thread_info *) entry; | |
292 | ||
293 | free_register_cache_thread (thread); | |
294 | } | |
295 | ||
296 | void | |
297 | regcache_release (void) | |
298 | { | |
299 | /* Flush and release all pre-existing register caches. */ | |
300 | for_each_inferior (&all_threads, free_register_cache_thread_one); | |
301 | } | |
302 | #endif | |
303 | ||
0a30fbc4 | 304 | int |
3aee8918 | 305 | register_cache_size (const struct target_desc *tdesc) |
0a30fbc4 | 306 | { |
3aee8918 PA |
307 | return tdesc->registers_size; |
308 | } | |
309 | ||
310 | int | |
311 | register_size (const struct target_desc *tdesc, int n) | |
312 | { | |
313 | return tdesc->reg_defs[n].size / 8; | |
0a30fbc4 DJ |
314 | } |
315 | ||
f450004a | 316 | static unsigned char * |
442ea881 | 317 | register_data (struct regcache *regcache, int n, int fetch) |
0a30fbc4 | 318 | { |
3aee8918 | 319 | return regcache->registers + regcache->tdesc->reg_defs[n].offset / 8; |
0a30fbc4 DJ |
320 | } |
321 | ||
1c79eb8a PA |
322 | /* Supply register N, whose contents are stored in BUF, to REGCACHE. |
323 | If BUF is NULL, the register's value is recorded as | |
324 | unavailable. */ | |
325 | ||
58caa3dc | 326 | void |
442ea881 | 327 | supply_register (struct regcache *regcache, int n, const void *buf) |
58caa3dc | 328 | { |
3327ccf7 | 329 | if (buf) |
1c79eb8a | 330 | { |
3aee8918 PA |
331 | memcpy (register_data (regcache, n, 0), buf, |
332 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
333 | #ifndef IN_PROCESS_AGENT |
334 | if (regcache->register_status != NULL) | |
335 | regcache->register_status[n] = REG_VALID; | |
336 | #endif | |
337 | } | |
3327ccf7 | 338 | else |
1c79eb8a | 339 | { |
3aee8918 PA |
340 | memset (register_data (regcache, n, 0), 0, |
341 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
342 | #ifndef IN_PROCESS_AGENT |
343 | if (regcache->register_status != NULL) | |
344 | regcache->register_status[n] = REG_UNAVAILABLE; | |
345 | #endif | |
346 | } | |
58caa3dc DJ |
347 | } |
348 | ||
1c79eb8a PA |
349 | /* Supply register N with value zero to REGCACHE. */ |
350 | ||
351 | void | |
352 | supply_register_zeroed (struct regcache *regcache, int n) | |
353 | { | |
3aee8918 PA |
354 | memset (register_data (regcache, n, 0), 0, |
355 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
356 | #ifndef IN_PROCESS_AGENT |
357 | if (regcache->register_status != NULL) | |
358 | regcache->register_status[n] = REG_VALID; | |
359 | #endif | |
360 | } | |
361 | ||
362 | /* Supply the whole register set whose contents are stored in BUF, to | |
363 | REGCACHE. If BUF is NULL, all the registers' values are recorded | |
364 | as unavailable. */ | |
365 | ||
219f2f23 PA |
366 | void |
367 | supply_regblock (struct regcache *regcache, const void *buf) | |
368 | { | |
369 | if (buf) | |
1c79eb8a | 370 | { |
3aee8918 PA |
371 | const struct target_desc *tdesc = regcache->tdesc; |
372 | ||
373 | memcpy (regcache->registers, buf, tdesc->registers_size); | |
1c79eb8a PA |
374 | #ifndef IN_PROCESS_AGENT |
375 | { | |
376 | int i; | |
377 | ||
3aee8918 | 378 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
379 | regcache->register_status[i] = REG_VALID; |
380 | } | |
381 | #endif | |
382 | } | |
219f2f23 | 383 | else |
1c79eb8a | 384 | { |
3aee8918 PA |
385 | const struct target_desc *tdesc = regcache->tdesc; |
386 | ||
387 | memset (regcache->registers, 0, tdesc->registers_size); | |
1c79eb8a PA |
388 | #ifndef IN_PROCESS_AGENT |
389 | { | |
390 | int i; | |
391 | ||
3aee8918 | 392 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
393 | regcache->register_status[i] = REG_UNAVAILABLE; |
394 | } | |
395 | #endif | |
396 | } | |
219f2f23 PA |
397 | } |
398 | ||
fa593d66 PA |
399 | #ifndef IN_PROCESS_AGENT |
400 | ||
58caa3dc | 401 | void |
442ea881 PA |
402 | supply_register_by_name (struct regcache *regcache, |
403 | const char *name, const void *buf) | |
58caa3dc | 404 | { |
3aee8918 | 405 | supply_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc DJ |
406 | } |
407 | ||
fa593d66 PA |
408 | #endif |
409 | ||
58caa3dc | 410 | void |
442ea881 | 411 | collect_register (struct regcache *regcache, int n, void *buf) |
58caa3dc | 412 | { |
3aee8918 PA |
413 | memcpy (buf, register_data (regcache, n, 1), |
414 | register_size (regcache->tdesc, n)); | |
0d62e5e8 DJ |
415 | } |
416 | ||
fa593d66 PA |
417 | #ifndef IN_PROCESS_AGENT |
418 | ||
0d62e5e8 | 419 | void |
442ea881 | 420 | collect_register_as_string (struct regcache *regcache, int n, char *buf) |
0d62e5e8 | 421 | { |
e9371aff TT |
422 | bin2hex (register_data (regcache, n, 1), buf, |
423 | register_size (regcache->tdesc, n)); | |
58caa3dc DJ |
424 | } |
425 | ||
426 | void | |
442ea881 PA |
427 | collect_register_by_name (struct regcache *regcache, |
428 | const char *name, void *buf) | |
58caa3dc | 429 | { |
3aee8918 | 430 | collect_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc | 431 | } |
219f2f23 PA |
432 | |
433 | /* Special handling for register PC. */ | |
434 | ||
435 | CORE_ADDR | |
436 | regcache_read_pc (struct regcache *regcache) | |
437 | { | |
438 | CORE_ADDR pc_val; | |
439 | ||
440 | if (the_target->read_pc) | |
441 | pc_val = the_target->read_pc (regcache); | |
442 | else | |
443 | internal_error (__FILE__, __LINE__, | |
444 | "regcache_read_pc: Unable to find PC"); | |
445 | ||
446 | return pc_val; | |
447 | } | |
448 | ||
449 | void | |
450 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) | |
451 | { | |
452 | if (the_target->write_pc) | |
453 | the_target->write_pc (regcache, pc); | |
454 | else | |
455 | internal_error (__FILE__, __LINE__, | |
456 | "regcache_write_pc: Unable to update PC"); | |
457 | } | |
fa593d66 PA |
458 | |
459 | #endif |