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 PA |
133 | regcache->tdesc = tdesc; |
134 | regcache->registers = xcalloc (1, tdesc->registers_size); | |
219f2f23 | 135 | regcache->registers_owned = 1; |
3aee8918 | 136 | regcache->register_status = xcalloc (1, tdesc->num_registers); |
1c79eb8a | 137 | gdb_assert (REG_UNAVAILABLE == 0); |
fa593d66 | 138 | #else |
38e08fca | 139 | gdb_assert_not_reached ("can't allocate memory from the heap"); |
fa593d66 | 140 | #endif |
87f6c4e3 GB |
141 | } |
142 | else | |
219f2f23 | 143 | { |
3aee8918 | 144 | regcache->tdesc = tdesc; |
219f2f23 PA |
145 | regcache->registers = regbuf; |
146 | regcache->registers_owned = 0; | |
1c79eb8a PA |
147 | #ifndef IN_PROCESS_AGENT |
148 | regcache->register_status = NULL; | |
149 | #endif | |
219f2f23 PA |
150 | } |
151 | ||
152 | regcache->registers_valid = 0; | |
153 | ||
154 | return regcache; | |
155 | } | |
156 | ||
fa593d66 PA |
157 | #ifndef IN_PROCESS_AGENT |
158 | ||
442ea881 | 159 | struct regcache * |
3aee8918 | 160 | new_register_cache (const struct target_desc *tdesc) |
c04a1aa8 | 161 | { |
442ea881 | 162 | struct regcache *regcache; |
c04a1aa8 | 163 | |
3aee8918 | 164 | gdb_assert (tdesc->registers_size != 0); |
5822d809 | 165 | |
bca929d3 | 166 | regcache = xmalloc (sizeof (*regcache)); |
3aee8918 | 167 | return init_register_cache (regcache, tdesc, NULL); |
c04a1aa8 DJ |
168 | } |
169 | ||
170 | void | |
442ea881 | 171 | free_register_cache (struct regcache *regcache) |
c04a1aa8 | 172 | { |
5822d809 PA |
173 | if (regcache) |
174 | { | |
fa593d66 PA |
175 | if (regcache->registers_owned) |
176 | free (regcache->registers); | |
1c79eb8a | 177 | free (regcache->register_status); |
5822d809 PA |
178 | free (regcache); |
179 | } | |
c04a1aa8 DJ |
180 | } |
181 | ||
fa593d66 PA |
182 | #endif |
183 | ||
219f2f23 PA |
184 | void |
185 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
186 | { | |
3aee8918 PA |
187 | gdb_assert (src != NULL && dst != NULL); |
188 | gdb_assert (src->tdesc == dst->tdesc); | |
189 | gdb_assert (src != dst); | |
190 | ||
191 | memcpy (dst->registers, src->registers, src->tdesc->registers_size); | |
1c79eb8a PA |
192 | #ifndef IN_PROCESS_AGENT |
193 | if (dst->register_status != NULL && src->register_status != NULL) | |
3aee8918 PA |
194 | memcpy (dst->register_status, src->register_status, |
195 | src->tdesc->num_registers); | |
1c79eb8a | 196 | #endif |
219f2f23 PA |
197 | dst->registers_valid = src->registers_valid; |
198 | } | |
199 | ||
219f2f23 | 200 | |
fa593d66 PA |
201 | #ifndef IN_PROCESS_AGENT |
202 | ||
0a30fbc4 | 203 | void |
442ea881 | 204 | registers_to_string (struct regcache *regcache, char *buf) |
0a30fbc4 | 205 | { |
442ea881 | 206 | unsigned char *registers = regcache->registers; |
3aee8918 | 207 | const struct target_desc *tdesc = regcache->tdesc; |
1c79eb8a | 208 | int i; |
c04a1aa8 | 209 | |
3aee8918 | 210 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
211 | { |
212 | if (regcache->register_status[i] == REG_VALID) | |
213 | { | |
e9371aff | 214 | bin2hex (registers, buf, register_size (tdesc, i)); |
3aee8918 | 215 | buf += register_size (tdesc, i) * 2; |
1c79eb8a PA |
216 | } |
217 | else | |
218 | { | |
3aee8918 PA |
219 | memset (buf, 'x', register_size (tdesc, i) * 2); |
220 | buf += register_size (tdesc, i) * 2; | |
1c79eb8a | 221 | } |
3aee8918 | 222 | registers += register_size (tdesc, i); |
1c79eb8a PA |
223 | } |
224 | *buf = '\0'; | |
0a30fbc4 DJ |
225 | } |
226 | ||
227 | void | |
442ea881 | 228 | registers_from_string (struct regcache *regcache, char *buf) |
0a30fbc4 DJ |
229 | { |
230 | int len = strlen (buf); | |
442ea881 | 231 | unsigned char *registers = regcache->registers; |
3aee8918 | 232 | const struct target_desc *tdesc = regcache->tdesc; |
0a30fbc4 | 233 | |
3aee8918 | 234 | if (len != tdesc->registers_size * 2) |
0a30fbc4 | 235 | { |
1b3f6016 | 236 | warning ("Wrong sized register packet (expected %d bytes, got %d)", |
3aee8918 PA |
237 | 2 * tdesc->registers_size, len); |
238 | if (len > tdesc->registers_size * 2) | |
239 | len = tdesc->registers_size * 2; | |
0a30fbc4 | 240 | } |
a7191e8b | 241 | hex2bin (buf, registers, len / 2); |
0a30fbc4 DJ |
242 | } |
243 | ||
244 | struct reg * | |
3aee8918 | 245 | find_register_by_name (const struct target_desc *tdesc, const char *name) |
0a30fbc4 DJ |
246 | { |
247 | int i; | |
248 | ||
3aee8918 PA |
249 | for (i = 0; i < tdesc->num_registers; i++) |
250 | if (strcmp (name, tdesc->reg_defs[i].name) == 0) | |
251 | return &tdesc->reg_defs[i]; | |
38e08fca GB |
252 | internal_error (__FILE__, __LINE__, "Unknown register %s requested", |
253 | name); | |
0a30fbc4 DJ |
254 | } |
255 | ||
256 | int | |
3aee8918 | 257 | find_regno (const struct target_desc *tdesc, const char *name) |
0a30fbc4 DJ |
258 | { |
259 | int i; | |
260 | ||
3aee8918 PA |
261 | for (i = 0; i < tdesc->num_registers; i++) |
262 | if (strcmp (name, tdesc->reg_defs[i].name) == 0) | |
0a30fbc4 | 263 | return i; |
38e08fca GB |
264 | internal_error (__FILE__, __LINE__, "Unknown register %s requested", |
265 | name); | |
0a30fbc4 DJ |
266 | } |
267 | ||
268 | struct reg * | |
3aee8918 | 269 | find_register_by_number (const struct target_desc *tdesc, int n) |
0a30fbc4 | 270 | { |
3aee8918 | 271 | return &tdesc->reg_defs[n]; |
0a30fbc4 DJ |
272 | } |
273 | ||
fa593d66 PA |
274 | #endif |
275 | ||
3aee8918 PA |
276 | #ifndef IN_PROCESS_AGENT |
277 | static void | |
278 | free_register_cache_thread (struct thread_info *thread) | |
279 | { | |
a44892be | 280 | struct regcache *regcache = inferior_regcache_data (thread); |
3aee8918 PA |
281 | |
282 | if (regcache != NULL) | |
283 | { | |
284 | regcache_invalidate_thread (thread); | |
285 | free_register_cache (regcache); | |
286 | set_inferior_regcache_data (thread, NULL); | |
287 | } | |
288 | } | |
289 | ||
290 | static void | |
291 | free_register_cache_thread_one (struct inferior_list_entry *entry) | |
292 | { | |
293 | struct thread_info *thread = (struct thread_info *) entry; | |
294 | ||
295 | free_register_cache_thread (thread); | |
296 | } | |
297 | ||
298 | void | |
299 | regcache_release (void) | |
300 | { | |
301 | /* Flush and release all pre-existing register caches. */ | |
302 | for_each_inferior (&all_threads, free_register_cache_thread_one); | |
303 | } | |
304 | #endif | |
305 | ||
0a30fbc4 | 306 | int |
3aee8918 | 307 | register_cache_size (const struct target_desc *tdesc) |
0a30fbc4 | 308 | { |
3aee8918 PA |
309 | return tdesc->registers_size; |
310 | } | |
311 | ||
312 | int | |
313 | register_size (const struct target_desc *tdesc, int n) | |
314 | { | |
315 | return tdesc->reg_defs[n].size / 8; | |
0a30fbc4 DJ |
316 | } |
317 | ||
f450004a | 318 | static unsigned char * |
442ea881 | 319 | register_data (struct regcache *regcache, int n, int fetch) |
0a30fbc4 | 320 | { |
3aee8918 | 321 | return regcache->registers + regcache->tdesc->reg_defs[n].offset / 8; |
0a30fbc4 DJ |
322 | } |
323 | ||
1c79eb8a PA |
324 | /* Supply register N, whose contents are stored in BUF, to REGCACHE. |
325 | If BUF is NULL, the register's value is recorded as | |
326 | unavailable. */ | |
327 | ||
58caa3dc | 328 | void |
442ea881 | 329 | supply_register (struct regcache *regcache, int n, const void *buf) |
58caa3dc | 330 | { |
3327ccf7 | 331 | if (buf) |
1c79eb8a | 332 | { |
3aee8918 PA |
333 | memcpy (register_data (regcache, n, 0), buf, |
334 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
335 | #ifndef IN_PROCESS_AGENT |
336 | if (regcache->register_status != NULL) | |
337 | regcache->register_status[n] = REG_VALID; | |
338 | #endif | |
339 | } | |
3327ccf7 | 340 | else |
1c79eb8a | 341 | { |
3aee8918 PA |
342 | memset (register_data (regcache, n, 0), 0, |
343 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
344 | #ifndef IN_PROCESS_AGENT |
345 | if (regcache->register_status != NULL) | |
346 | regcache->register_status[n] = REG_UNAVAILABLE; | |
347 | #endif | |
348 | } | |
58caa3dc DJ |
349 | } |
350 | ||
1c79eb8a PA |
351 | /* Supply register N with value zero to REGCACHE. */ |
352 | ||
353 | void | |
354 | supply_register_zeroed (struct regcache *regcache, int n) | |
355 | { | |
3aee8918 PA |
356 | memset (register_data (regcache, n, 0), 0, |
357 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
358 | #ifndef IN_PROCESS_AGENT |
359 | if (regcache->register_status != NULL) | |
360 | regcache->register_status[n] = REG_VALID; | |
361 | #endif | |
362 | } | |
363 | ||
364 | /* Supply the whole register set whose contents are stored in BUF, to | |
365 | REGCACHE. If BUF is NULL, all the registers' values are recorded | |
366 | as unavailable. */ | |
367 | ||
219f2f23 PA |
368 | void |
369 | supply_regblock (struct regcache *regcache, const void *buf) | |
370 | { | |
371 | if (buf) | |
1c79eb8a | 372 | { |
3aee8918 PA |
373 | const struct target_desc *tdesc = regcache->tdesc; |
374 | ||
375 | memcpy (regcache->registers, buf, tdesc->registers_size); | |
1c79eb8a PA |
376 | #ifndef IN_PROCESS_AGENT |
377 | { | |
378 | int i; | |
379 | ||
3aee8918 | 380 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
381 | regcache->register_status[i] = REG_VALID; |
382 | } | |
383 | #endif | |
384 | } | |
219f2f23 | 385 | else |
1c79eb8a | 386 | { |
3aee8918 PA |
387 | const struct target_desc *tdesc = regcache->tdesc; |
388 | ||
389 | memset (regcache->registers, 0, tdesc->registers_size); | |
1c79eb8a PA |
390 | #ifndef IN_PROCESS_AGENT |
391 | { | |
392 | int i; | |
393 | ||
3aee8918 | 394 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
395 | regcache->register_status[i] = REG_UNAVAILABLE; |
396 | } | |
397 | #endif | |
398 | } | |
219f2f23 PA |
399 | } |
400 | ||
fa593d66 PA |
401 | #ifndef IN_PROCESS_AGENT |
402 | ||
58caa3dc | 403 | void |
442ea881 PA |
404 | supply_register_by_name (struct regcache *regcache, |
405 | const char *name, const void *buf) | |
58caa3dc | 406 | { |
3aee8918 | 407 | supply_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc DJ |
408 | } |
409 | ||
fa593d66 PA |
410 | #endif |
411 | ||
58caa3dc | 412 | void |
442ea881 | 413 | collect_register (struct regcache *regcache, int n, void *buf) |
58caa3dc | 414 | { |
3aee8918 PA |
415 | memcpy (buf, register_data (regcache, n, 1), |
416 | register_size (regcache->tdesc, n)); | |
0d62e5e8 DJ |
417 | } |
418 | ||
fa593d66 PA |
419 | #ifndef IN_PROCESS_AGENT |
420 | ||
0d62e5e8 | 421 | void |
442ea881 | 422 | collect_register_as_string (struct regcache *regcache, int n, char *buf) |
0d62e5e8 | 423 | { |
e9371aff TT |
424 | bin2hex (register_data (regcache, n, 1), buf, |
425 | register_size (regcache->tdesc, n)); | |
58caa3dc DJ |
426 | } |
427 | ||
428 | void | |
442ea881 PA |
429 | collect_register_by_name (struct regcache *regcache, |
430 | const char *name, void *buf) | |
58caa3dc | 431 | { |
3aee8918 | 432 | collect_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc | 433 | } |
219f2f23 PA |
434 | |
435 | /* Special handling for register PC. */ | |
436 | ||
437 | CORE_ADDR | |
438 | regcache_read_pc (struct regcache *regcache) | |
439 | { | |
440 | CORE_ADDR pc_val; | |
441 | ||
442 | if (the_target->read_pc) | |
443 | pc_val = the_target->read_pc (regcache); | |
444 | else | |
445 | internal_error (__FILE__, __LINE__, | |
446 | "regcache_read_pc: Unable to find PC"); | |
447 | ||
448 | return pc_val; | |
449 | } | |
450 | ||
451 | void | |
452 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) | |
453 | { | |
454 | if (the_target->write_pc) | |
455 | the_target->write_pc (regcache, pc); | |
456 | else | |
457 | internal_error (__FILE__, __LINE__, | |
458 | "regcache_write_pc: Unable to update PC"); | |
459 | } | |
fa593d66 PA |
460 | |
461 | #endif |