Commit | Line | Data |
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0a30fbc4 | 1 | /* Register support routines for the remote server for GDB. |
32d0add0 | 2 | Copyright (C) 2001-2015 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 | |
a44892be | 31 | 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; |
098dbe61 AA |
55 | /* Invalidate all registers, to prevent stale left-overs. */ |
56 | memset (regcache->register_status, REG_UNAVAILABLE, | |
57 | regcache->tdesc->num_registers); | |
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 | |
a44892be | 79 | regcache = inferior_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 PA |
96 | static int |
97 | regcache_invalidate_one (struct inferior_list_entry *entry, | |
98 | void *pid_p) | |
99 | { | |
100 | struct thread_info *thread = (struct thread_info *) entry; | |
101 | int pid = *(int *) pid_p; | |
102 | ||
103 | /* Only invalidate the regcaches of threads of this process. */ | |
104 | if (ptid_get_pid (entry->id) == pid) | |
105 | regcache_invalidate_thread (thread); | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
0d62e5e8 | 110 | void |
442ea881 | 111 | regcache_invalidate (void) |
0d62e5e8 | 112 | { |
3aee8918 | 113 | /* Only update the threads of the current process. */ |
0bfdf32f | 114 | int pid = ptid_get_pid (current_thread->entry.id); |
3aee8918 PA |
115 | |
116 | find_inferior (&all_threads, regcache_invalidate_one, &pid); | |
0d62e5e8 DJ |
117 | } |
118 | ||
fa593d66 PA |
119 | #endif |
120 | ||
219f2f23 | 121 | struct regcache * |
3aee8918 PA |
122 | init_register_cache (struct regcache *regcache, |
123 | const struct target_desc *tdesc, | |
124 | unsigned char *regbuf) | |
219f2f23 PA |
125 | { |
126 | if (regbuf == NULL) | |
127 | { | |
87f6c4e3 | 128 | #ifndef IN_PROCESS_AGENT |
219f2f23 PA |
129 | /* Make sure to zero-initialize the register cache when it is |
130 | created, in case there are registers the target never | |
131 | fetches. This way they'll read as zero instead of | |
132 | garbage. */ | |
3aee8918 | 133 | regcache->tdesc = tdesc; |
224c3ddb SM |
134 | regcache->registers |
135 | = (unsigned char *) xcalloc (1, tdesc->registers_size); | |
219f2f23 | 136 | regcache->registers_owned = 1; |
224c3ddb SM |
137 | regcache->register_status |
138 | = (unsigned char *) xcalloc (1, tdesc->num_registers); | |
1c79eb8a | 139 | gdb_assert (REG_UNAVAILABLE == 0); |
fa593d66 | 140 | #else |
38e08fca | 141 | gdb_assert_not_reached ("can't allocate memory from the heap"); |
fa593d66 | 142 | #endif |
87f6c4e3 GB |
143 | } |
144 | else | |
219f2f23 | 145 | { |
3aee8918 | 146 | regcache->tdesc = tdesc; |
219f2f23 PA |
147 | regcache->registers = regbuf; |
148 | regcache->registers_owned = 0; | |
1c79eb8a PA |
149 | #ifndef IN_PROCESS_AGENT |
150 | regcache->register_status = NULL; | |
151 | #endif | |
219f2f23 PA |
152 | } |
153 | ||
154 | regcache->registers_valid = 0; | |
155 | ||
156 | return regcache; | |
157 | } | |
158 | ||
fa593d66 PA |
159 | #ifndef IN_PROCESS_AGENT |
160 | ||
442ea881 | 161 | struct regcache * |
3aee8918 | 162 | new_register_cache (const struct target_desc *tdesc) |
c04a1aa8 | 163 | { |
8d749320 | 164 | struct regcache *regcache = XCNEW (struct regcache); |
c04a1aa8 | 165 | |
3aee8918 | 166 | gdb_assert (tdesc->registers_size != 0); |
5822d809 | 167 | |
3aee8918 | 168 | return init_register_cache (regcache, tdesc, NULL); |
c04a1aa8 DJ |
169 | } |
170 | ||
171 | void | |
442ea881 | 172 | free_register_cache (struct regcache *regcache) |
c04a1aa8 | 173 | { |
5822d809 PA |
174 | if (regcache) |
175 | { | |
fa593d66 PA |
176 | if (regcache->registers_owned) |
177 | free (regcache->registers); | |
1c79eb8a | 178 | free (regcache->register_status); |
5822d809 PA |
179 | free (regcache); |
180 | } | |
c04a1aa8 DJ |
181 | } |
182 | ||
fa593d66 PA |
183 | #endif |
184 | ||
219f2f23 PA |
185 | void |
186 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
187 | { | |
3aee8918 PA |
188 | gdb_assert (src != NULL && dst != NULL); |
189 | gdb_assert (src->tdesc == dst->tdesc); | |
190 | gdb_assert (src != dst); | |
191 | ||
192 | memcpy (dst->registers, src->registers, src->tdesc->registers_size); | |
1c79eb8a PA |
193 | #ifndef IN_PROCESS_AGENT |
194 | if (dst->register_status != NULL && src->register_status != NULL) | |
3aee8918 PA |
195 | memcpy (dst->register_status, src->register_status, |
196 | src->tdesc->num_registers); | |
1c79eb8a | 197 | #endif |
219f2f23 PA |
198 | dst->registers_valid = src->registers_valid; |
199 | } | |
200 | ||
219f2f23 | 201 | |
fa593d66 PA |
202 | #ifndef IN_PROCESS_AGENT |
203 | ||
0a30fbc4 | 204 | void |
442ea881 | 205 | registers_to_string (struct regcache *regcache, char *buf) |
0a30fbc4 | 206 | { |
442ea881 | 207 | unsigned char *registers = regcache->registers; |
3aee8918 | 208 | const struct target_desc *tdesc = regcache->tdesc; |
1c79eb8a | 209 | int i; |
c04a1aa8 | 210 | |
3aee8918 | 211 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
212 | { |
213 | if (regcache->register_status[i] == REG_VALID) | |
214 | { | |
e9371aff | 215 | bin2hex (registers, buf, register_size (tdesc, i)); |
3aee8918 | 216 | buf += register_size (tdesc, i) * 2; |
1c79eb8a PA |
217 | } |
218 | else | |
219 | { | |
3aee8918 PA |
220 | memset (buf, 'x', register_size (tdesc, i) * 2); |
221 | buf += register_size (tdesc, i) * 2; | |
1c79eb8a | 222 | } |
3aee8918 | 223 | registers += register_size (tdesc, i); |
1c79eb8a PA |
224 | } |
225 | *buf = '\0'; | |
0a30fbc4 DJ |
226 | } |
227 | ||
228 | void | |
442ea881 | 229 | registers_from_string (struct regcache *regcache, char *buf) |
0a30fbc4 DJ |
230 | { |
231 | int len = strlen (buf); | |
442ea881 | 232 | unsigned char *registers = regcache->registers; |
3aee8918 | 233 | const struct target_desc *tdesc = regcache->tdesc; |
0a30fbc4 | 234 | |
3aee8918 | 235 | if (len != tdesc->registers_size * 2) |
0a30fbc4 | 236 | { |
1b3f6016 | 237 | warning ("Wrong sized register packet (expected %d bytes, got %d)", |
3aee8918 PA |
238 | 2 * tdesc->registers_size, len); |
239 | if (len > tdesc->registers_size * 2) | |
240 | len = tdesc->registers_size * 2; | |
0a30fbc4 | 241 | } |
a7191e8b | 242 | hex2bin (buf, registers, len / 2); |
0a30fbc4 DJ |
243 | } |
244 | ||
245 | struct reg * | |
3aee8918 | 246 | find_register_by_name (const struct target_desc *tdesc, const char *name) |
0a30fbc4 DJ |
247 | { |
248 | int i; | |
249 | ||
3aee8918 PA |
250 | for (i = 0; i < tdesc->num_registers; i++) |
251 | if (strcmp (name, tdesc->reg_defs[i].name) == 0) | |
252 | return &tdesc->reg_defs[i]; | |
38e08fca GB |
253 | internal_error (__FILE__, __LINE__, "Unknown register %s requested", |
254 | name); | |
0a30fbc4 DJ |
255 | } |
256 | ||
257 | int | |
3aee8918 | 258 | find_regno (const struct target_desc *tdesc, const char *name) |
0a30fbc4 DJ |
259 | { |
260 | int i; | |
261 | ||
3aee8918 PA |
262 | for (i = 0; i < tdesc->num_registers; i++) |
263 | if (strcmp (name, tdesc->reg_defs[i].name) == 0) | |
0a30fbc4 | 264 | return i; |
38e08fca GB |
265 | internal_error (__FILE__, __LINE__, "Unknown register %s requested", |
266 | name); | |
0a30fbc4 DJ |
267 | } |
268 | ||
269 | struct reg * | |
3aee8918 | 270 | find_register_by_number (const struct target_desc *tdesc, int n) |
0a30fbc4 | 271 | { |
3aee8918 | 272 | return &tdesc->reg_defs[n]; |
0a30fbc4 DJ |
273 | } |
274 | ||
fa593d66 PA |
275 | #endif |
276 | ||
3aee8918 PA |
277 | #ifndef IN_PROCESS_AGENT |
278 | static void | |
279 | free_register_cache_thread (struct thread_info *thread) | |
280 | { | |
a44892be | 281 | struct regcache *regcache = inferior_regcache_data (thread); |
3aee8918 PA |
282 | |
283 | if (regcache != NULL) | |
284 | { | |
285 | regcache_invalidate_thread (thread); | |
286 | free_register_cache (regcache); | |
287 | set_inferior_regcache_data (thread, NULL); | |
288 | } | |
289 | } | |
290 | ||
291 | static void | |
292 | free_register_cache_thread_one (struct inferior_list_entry *entry) | |
293 | { | |
294 | struct thread_info *thread = (struct thread_info *) entry; | |
295 | ||
296 | free_register_cache_thread (thread); | |
297 | } | |
298 | ||
299 | void | |
300 | regcache_release (void) | |
301 | { | |
302 | /* Flush and release all pre-existing register caches. */ | |
303 | for_each_inferior (&all_threads, free_register_cache_thread_one); | |
304 | } | |
305 | #endif | |
306 | ||
0a30fbc4 | 307 | int |
3aee8918 | 308 | register_cache_size (const struct target_desc *tdesc) |
0a30fbc4 | 309 | { |
3aee8918 PA |
310 | return tdesc->registers_size; |
311 | } | |
312 | ||
313 | int | |
314 | register_size (const struct target_desc *tdesc, int n) | |
315 | { | |
316 | return tdesc->reg_defs[n].size / 8; | |
0a30fbc4 DJ |
317 | } |
318 | ||
f450004a | 319 | static unsigned char * |
442ea881 | 320 | register_data (struct regcache *regcache, int n, int fetch) |
0a30fbc4 | 321 | { |
3aee8918 | 322 | return regcache->registers + regcache->tdesc->reg_defs[n].offset / 8; |
0a30fbc4 DJ |
323 | } |
324 | ||
1c79eb8a PA |
325 | /* Supply register N, whose contents are stored in BUF, to REGCACHE. |
326 | If BUF is NULL, the register's value is recorded as | |
327 | unavailable. */ | |
328 | ||
58caa3dc | 329 | void |
442ea881 | 330 | supply_register (struct regcache *regcache, int n, const void *buf) |
58caa3dc | 331 | { |
3327ccf7 | 332 | if (buf) |
1c79eb8a | 333 | { |
3aee8918 PA |
334 | memcpy (register_data (regcache, n, 0), buf, |
335 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
336 | #ifndef IN_PROCESS_AGENT |
337 | if (regcache->register_status != NULL) | |
338 | regcache->register_status[n] = REG_VALID; | |
339 | #endif | |
340 | } | |
3327ccf7 | 341 | else |
1c79eb8a | 342 | { |
3aee8918 PA |
343 | memset (register_data (regcache, n, 0), 0, |
344 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
345 | #ifndef IN_PROCESS_AGENT |
346 | if (regcache->register_status != NULL) | |
347 | regcache->register_status[n] = REG_UNAVAILABLE; | |
348 | #endif | |
349 | } | |
58caa3dc DJ |
350 | } |
351 | ||
1c79eb8a PA |
352 | /* Supply register N with value zero to REGCACHE. */ |
353 | ||
354 | void | |
355 | supply_register_zeroed (struct regcache *regcache, int n) | |
356 | { | |
3aee8918 PA |
357 | memset (register_data (regcache, n, 0), 0, |
358 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
359 | #ifndef IN_PROCESS_AGENT |
360 | if (regcache->register_status != NULL) | |
361 | regcache->register_status[n] = REG_VALID; | |
362 | #endif | |
363 | } | |
364 | ||
365 | /* Supply the whole register set whose contents are stored in BUF, to | |
366 | REGCACHE. If BUF is NULL, all the registers' values are recorded | |
367 | as unavailable. */ | |
368 | ||
219f2f23 PA |
369 | void |
370 | supply_regblock (struct regcache *regcache, const void *buf) | |
371 | { | |
372 | if (buf) | |
1c79eb8a | 373 | { |
3aee8918 PA |
374 | const struct target_desc *tdesc = regcache->tdesc; |
375 | ||
376 | memcpy (regcache->registers, buf, tdesc->registers_size); | |
1c79eb8a PA |
377 | #ifndef IN_PROCESS_AGENT |
378 | { | |
379 | int i; | |
380 | ||
3aee8918 | 381 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
382 | regcache->register_status[i] = REG_VALID; |
383 | } | |
384 | #endif | |
385 | } | |
219f2f23 | 386 | else |
1c79eb8a | 387 | { |
3aee8918 PA |
388 | const struct target_desc *tdesc = regcache->tdesc; |
389 | ||
390 | memset (regcache->registers, 0, tdesc->registers_size); | |
1c79eb8a PA |
391 | #ifndef IN_PROCESS_AGENT |
392 | { | |
393 | int i; | |
394 | ||
3aee8918 | 395 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
396 | regcache->register_status[i] = REG_UNAVAILABLE; |
397 | } | |
398 | #endif | |
399 | } | |
219f2f23 PA |
400 | } |
401 | ||
fa593d66 PA |
402 | #ifndef IN_PROCESS_AGENT |
403 | ||
58caa3dc | 404 | void |
442ea881 PA |
405 | supply_register_by_name (struct regcache *regcache, |
406 | const char *name, const void *buf) | |
58caa3dc | 407 | { |
3aee8918 | 408 | supply_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc DJ |
409 | } |
410 | ||
fa593d66 PA |
411 | #endif |
412 | ||
58caa3dc | 413 | void |
442ea881 | 414 | collect_register (struct regcache *regcache, int n, void *buf) |
58caa3dc | 415 | { |
3aee8918 PA |
416 | memcpy (buf, register_data (regcache, n, 1), |
417 | register_size (regcache->tdesc, n)); | |
0d62e5e8 DJ |
418 | } |
419 | ||
fa593d66 PA |
420 | #ifndef IN_PROCESS_AGENT |
421 | ||
0d62e5e8 | 422 | void |
442ea881 | 423 | collect_register_as_string (struct regcache *regcache, int n, char *buf) |
0d62e5e8 | 424 | { |
e9371aff TT |
425 | bin2hex (register_data (regcache, n, 1), buf, |
426 | register_size (regcache->tdesc, n)); | |
58caa3dc DJ |
427 | } |
428 | ||
429 | void | |
442ea881 PA |
430 | collect_register_by_name (struct regcache *regcache, |
431 | const char *name, void *buf) | |
58caa3dc | 432 | { |
3aee8918 | 433 | collect_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc | 434 | } |
219f2f23 PA |
435 | |
436 | /* Special handling for register PC. */ | |
437 | ||
438 | CORE_ADDR | |
439 | regcache_read_pc (struct regcache *regcache) | |
440 | { | |
441 | CORE_ADDR pc_val; | |
442 | ||
443 | if (the_target->read_pc) | |
444 | pc_val = the_target->read_pc (regcache); | |
445 | else | |
446 | internal_error (__FILE__, __LINE__, | |
447 | "regcache_read_pc: Unable to find PC"); | |
448 | ||
449 | return pc_val; | |
450 | } | |
451 | ||
452 | void | |
453 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) | |
454 | { | |
455 | if (the_target->write_pc) | |
456 | the_target->write_pc (regcache, pc); | |
457 | else | |
458 | internal_error (__FILE__, __LINE__, | |
459 | "regcache_write_pc: Unable to update PC"); | |
460 | } | |
fa593d66 PA |
461 | |
462 | #endif |