Commit | Line | Data |
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0a30fbc4 | 1 | /* Register support routines for the remote server for GDB. |
28e7fd62 | 2 | Copyright (C) 2001-2013 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" |
0a30fbc4 DJ |
23 | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | ||
fa593d66 PA |
27 | #ifndef IN_PROCESS_AGENT |
28 | ||
442ea881 PA |
29 | struct regcache * |
30 | get_thread_regcache (struct thread_info *thread, int fetch) | |
c04a1aa8 | 31 | { |
442ea881 | 32 | struct regcache *regcache; |
c04a1aa8 | 33 | |
442ea881 | 34 | regcache = (struct regcache *) inferior_regcache_data (thread); |
c04a1aa8 | 35 | |
3aee8918 PA |
36 | /* Threads' regcaches are created lazily, because biarch targets add |
37 | the main thread/lwp before seeing it stop for the first time, and | |
38 | it is only after the target sees the thread stop for the first | |
39 | time that the target has a chance of determining the process's | |
40 | architecture. IOW, when we first add the process's main thread | |
41 | we don't know which architecture/tdesc its regcache should | |
42 | have. */ | |
c04a1aa8 | 43 | if (regcache == NULL) |
3aee8918 PA |
44 | { |
45 | struct process_info *proc = get_thread_process (thread); | |
46 | ||
47 | if (proc->tdesc == NULL) | |
48 | fatal ("no target description"); | |
49 | ||
50 | regcache = new_register_cache (proc->tdesc); | |
51 | set_inferior_regcache_data (thread, regcache); | |
52 | } | |
c04a1aa8 | 53 | |
0d62e5e8 DJ |
54 | if (fetch && regcache->registers_valid == 0) |
55 | { | |
442ea881 PA |
56 | struct thread_info *saved_inferior = current_inferior; |
57 | ||
58 | current_inferior = thread; | |
59 | fetch_inferior_registers (regcache, -1); | |
60 | current_inferior = saved_inferior; | |
0d62e5e8 DJ |
61 | regcache->registers_valid = 1; |
62 | } | |
63 | ||
c04a1aa8 DJ |
64 | return regcache; |
65 | } | |
66 | ||
0d62e5e8 | 67 | void |
3aee8918 | 68 | regcache_invalidate_thread (struct thread_info *thread) |
0d62e5e8 | 69 | { |
442ea881 | 70 | struct regcache *regcache; |
0d62e5e8 | 71 | |
442ea881 | 72 | regcache = (struct regcache *) inferior_regcache_data (thread); |
0d62e5e8 | 73 | |
45ba0d02 PA |
74 | if (regcache == NULL) |
75 | return; | |
76 | ||
0d62e5e8 DJ |
77 | if (regcache->registers_valid) |
78 | { | |
79 | struct thread_info *saved_inferior = current_inferior; | |
80 | ||
81 | current_inferior = thread; | |
442ea881 | 82 | store_inferior_registers (regcache, -1); |
0d62e5e8 DJ |
83 | current_inferior = saved_inferior; |
84 | } | |
85 | ||
86 | regcache->registers_valid = 0; | |
87 | } | |
88 | ||
3aee8918 PA |
89 | static int |
90 | regcache_invalidate_one (struct inferior_list_entry *entry, | |
91 | void *pid_p) | |
92 | { | |
93 | struct thread_info *thread = (struct thread_info *) entry; | |
94 | int pid = *(int *) pid_p; | |
95 | ||
96 | /* Only invalidate the regcaches of threads of this process. */ | |
97 | if (ptid_get_pid (entry->id) == pid) | |
98 | regcache_invalidate_thread (thread); | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
0d62e5e8 | 103 | void |
442ea881 | 104 | regcache_invalidate (void) |
0d62e5e8 | 105 | { |
3aee8918 PA |
106 | /* Only update the threads of the current process. */ |
107 | int pid = ptid_get_pid (current_inferior->entry.id); | |
108 | ||
109 | find_inferior (&all_threads, regcache_invalidate_one, &pid); | |
0d62e5e8 DJ |
110 | } |
111 | ||
fa593d66 PA |
112 | #endif |
113 | ||
219f2f23 | 114 | struct regcache * |
3aee8918 PA |
115 | init_register_cache (struct regcache *regcache, |
116 | const struct target_desc *tdesc, | |
117 | unsigned char *regbuf) | |
219f2f23 | 118 | { |
fa593d66 | 119 | #ifndef IN_PROCESS_AGENT |
219f2f23 PA |
120 | if (regbuf == NULL) |
121 | { | |
122 | /* Make sure to zero-initialize the register cache when it is | |
123 | created, in case there are registers the target never | |
124 | fetches. This way they'll read as zero instead of | |
125 | garbage. */ | |
3aee8918 PA |
126 | regcache->tdesc = tdesc; |
127 | regcache->registers = xcalloc (1, tdesc->registers_size); | |
219f2f23 | 128 | regcache->registers_owned = 1; |
3aee8918 | 129 | regcache->register_status = xcalloc (1, tdesc->num_registers); |
1c79eb8a | 130 | gdb_assert (REG_UNAVAILABLE == 0); |
219f2f23 PA |
131 | } |
132 | else | |
fa593d66 PA |
133 | #else |
134 | if (regbuf == NULL) | |
135 | fatal ("init_register_cache: can't allocate memory from the heap"); | |
136 | else | |
137 | #endif | |
219f2f23 | 138 | { |
3aee8918 | 139 | regcache->tdesc = tdesc; |
219f2f23 PA |
140 | regcache->registers = regbuf; |
141 | regcache->registers_owned = 0; | |
1c79eb8a PA |
142 | #ifndef IN_PROCESS_AGENT |
143 | regcache->register_status = NULL; | |
144 | #endif | |
219f2f23 PA |
145 | } |
146 | ||
147 | regcache->registers_valid = 0; | |
148 | ||
149 | return regcache; | |
150 | } | |
151 | ||
fa593d66 PA |
152 | #ifndef IN_PROCESS_AGENT |
153 | ||
442ea881 | 154 | struct regcache * |
3aee8918 | 155 | new_register_cache (const struct target_desc *tdesc) |
c04a1aa8 | 156 | { |
442ea881 | 157 | struct regcache *regcache; |
c04a1aa8 | 158 | |
3aee8918 | 159 | gdb_assert (tdesc->registers_size != 0); |
5822d809 | 160 | |
bca929d3 | 161 | regcache = xmalloc (sizeof (*regcache)); |
3aee8918 | 162 | return init_register_cache (regcache, tdesc, NULL); |
c04a1aa8 DJ |
163 | } |
164 | ||
165 | void | |
442ea881 | 166 | free_register_cache (struct regcache *regcache) |
c04a1aa8 | 167 | { |
5822d809 PA |
168 | if (regcache) |
169 | { | |
fa593d66 PA |
170 | if (regcache->registers_owned) |
171 | free (regcache->registers); | |
1c79eb8a | 172 | free (regcache->register_status); |
5822d809 PA |
173 | free (regcache); |
174 | } | |
c04a1aa8 DJ |
175 | } |
176 | ||
fa593d66 PA |
177 | #endif |
178 | ||
219f2f23 PA |
179 | void |
180 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
181 | { | |
3aee8918 PA |
182 | gdb_assert (src != NULL && dst != NULL); |
183 | gdb_assert (src->tdesc == dst->tdesc); | |
184 | gdb_assert (src != dst); | |
185 | ||
186 | memcpy (dst->registers, src->registers, src->tdesc->registers_size); | |
1c79eb8a PA |
187 | #ifndef IN_PROCESS_AGENT |
188 | if (dst->register_status != NULL && src->register_status != NULL) | |
3aee8918 PA |
189 | memcpy (dst->register_status, src->register_status, |
190 | src->tdesc->num_registers); | |
1c79eb8a | 191 | #endif |
219f2f23 PA |
192 | dst->registers_valid = src->registers_valid; |
193 | } | |
194 | ||
219f2f23 | 195 | |
fa593d66 PA |
196 | #ifndef IN_PROCESS_AGENT |
197 | ||
0a30fbc4 | 198 | void |
442ea881 | 199 | registers_to_string (struct regcache *regcache, char *buf) |
0a30fbc4 | 200 | { |
442ea881 | 201 | unsigned char *registers = regcache->registers; |
3aee8918 | 202 | const struct target_desc *tdesc = regcache->tdesc; |
1c79eb8a | 203 | int i; |
c04a1aa8 | 204 | |
3aee8918 | 205 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
206 | { |
207 | if (regcache->register_status[i] == REG_VALID) | |
208 | { | |
3aee8918 PA |
209 | convert_int_to_ascii (registers, buf, |
210 | register_size (tdesc, i)); | |
211 | buf += register_size (tdesc, i) * 2; | |
1c79eb8a PA |
212 | } |
213 | else | |
214 | { | |
3aee8918 PA |
215 | memset (buf, 'x', register_size (tdesc, i) * 2); |
216 | buf += register_size (tdesc, i) * 2; | |
1c79eb8a | 217 | } |
3aee8918 | 218 | registers += register_size (tdesc, i); |
1c79eb8a PA |
219 | } |
220 | *buf = '\0'; | |
0a30fbc4 DJ |
221 | } |
222 | ||
223 | void | |
442ea881 | 224 | registers_from_string (struct regcache *regcache, char *buf) |
0a30fbc4 DJ |
225 | { |
226 | int len = strlen (buf); | |
442ea881 | 227 | unsigned char *registers = regcache->registers; |
3aee8918 | 228 | const struct target_desc *tdesc = regcache->tdesc; |
0a30fbc4 | 229 | |
3aee8918 | 230 | if (len != tdesc->registers_size * 2) |
0a30fbc4 | 231 | { |
1b3f6016 | 232 | warning ("Wrong sized register packet (expected %d bytes, got %d)", |
3aee8918 PA |
233 | 2 * tdesc->registers_size, len); |
234 | if (len > tdesc->registers_size * 2) | |
235 | len = tdesc->registers_size * 2; | |
0a30fbc4 DJ |
236 | } |
237 | convert_ascii_to_int (buf, registers, len / 2); | |
238 | } | |
239 | ||
240 | struct reg * | |
3aee8918 | 241 | find_register_by_name (const struct target_desc *tdesc, const char *name) |
0a30fbc4 DJ |
242 | { |
243 | int i; | |
244 | ||
3aee8918 PA |
245 | for (i = 0; i < tdesc->num_registers; i++) |
246 | if (strcmp (name, tdesc->reg_defs[i].name) == 0) | |
247 | return &tdesc->reg_defs[i]; | |
0a30fbc4 DJ |
248 | fatal ("Unknown register %s requested", name); |
249 | return 0; | |
250 | } | |
251 | ||
252 | int | |
3aee8918 | 253 | find_regno (const struct target_desc *tdesc, const char *name) |
0a30fbc4 DJ |
254 | { |
255 | int i; | |
256 | ||
3aee8918 PA |
257 | for (i = 0; i < tdesc->num_registers; i++) |
258 | if (strcmp (name, tdesc->reg_defs[i].name) == 0) | |
0a30fbc4 DJ |
259 | return i; |
260 | fatal ("Unknown register %s requested", name); | |
261 | return -1; | |
262 | } | |
263 | ||
264 | struct reg * | |
3aee8918 | 265 | find_register_by_number (const struct target_desc *tdesc, int n) |
0a30fbc4 | 266 | { |
3aee8918 | 267 | return &tdesc->reg_defs[n]; |
0a30fbc4 DJ |
268 | } |
269 | ||
fa593d66 PA |
270 | #endif |
271 | ||
3aee8918 PA |
272 | #ifndef IN_PROCESS_AGENT |
273 | static void | |
274 | free_register_cache_thread (struct thread_info *thread) | |
275 | { | |
276 | struct regcache *regcache | |
277 | = (struct regcache *) inferior_regcache_data (thread); | |
278 | ||
279 | if (regcache != NULL) | |
280 | { | |
281 | regcache_invalidate_thread (thread); | |
282 | free_register_cache (regcache); | |
283 | set_inferior_regcache_data (thread, NULL); | |
284 | } | |
285 | } | |
286 | ||
287 | static void | |
288 | free_register_cache_thread_one (struct inferior_list_entry *entry) | |
289 | { | |
290 | struct thread_info *thread = (struct thread_info *) entry; | |
291 | ||
292 | free_register_cache_thread (thread); | |
293 | } | |
294 | ||
295 | void | |
296 | regcache_release (void) | |
297 | { | |
298 | /* Flush and release all pre-existing register caches. */ | |
299 | for_each_inferior (&all_threads, free_register_cache_thread_one); | |
300 | } | |
301 | #endif | |
302 | ||
0a30fbc4 | 303 | int |
3aee8918 | 304 | register_cache_size (const struct target_desc *tdesc) |
0a30fbc4 | 305 | { |
3aee8918 PA |
306 | return tdesc->registers_size; |
307 | } | |
308 | ||
309 | int | |
310 | register_size (const struct target_desc *tdesc, int n) | |
311 | { | |
312 | return tdesc->reg_defs[n].size / 8; | |
0a30fbc4 DJ |
313 | } |
314 | ||
f450004a | 315 | static unsigned char * |
442ea881 | 316 | register_data (struct regcache *regcache, int n, int fetch) |
0a30fbc4 | 317 | { |
3aee8918 | 318 | return regcache->registers + regcache->tdesc->reg_defs[n].offset / 8; |
0a30fbc4 DJ |
319 | } |
320 | ||
1c79eb8a PA |
321 | /* Supply register N, whose contents are stored in BUF, to REGCACHE. |
322 | If BUF is NULL, the register's value is recorded as | |
323 | unavailable. */ | |
324 | ||
58caa3dc | 325 | void |
442ea881 | 326 | supply_register (struct regcache *regcache, int n, const void *buf) |
58caa3dc | 327 | { |
3327ccf7 | 328 | if (buf) |
1c79eb8a | 329 | { |
3aee8918 PA |
330 | memcpy (register_data (regcache, n, 0), buf, |
331 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
332 | #ifndef IN_PROCESS_AGENT |
333 | if (regcache->register_status != NULL) | |
334 | regcache->register_status[n] = REG_VALID; | |
335 | #endif | |
336 | } | |
3327ccf7 | 337 | else |
1c79eb8a | 338 | { |
3aee8918 PA |
339 | memset (register_data (regcache, n, 0), 0, |
340 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
341 | #ifndef IN_PROCESS_AGENT |
342 | if (regcache->register_status != NULL) | |
343 | regcache->register_status[n] = REG_UNAVAILABLE; | |
344 | #endif | |
345 | } | |
58caa3dc DJ |
346 | } |
347 | ||
1c79eb8a PA |
348 | /* Supply register N with value zero to REGCACHE. */ |
349 | ||
350 | void | |
351 | supply_register_zeroed (struct regcache *regcache, int n) | |
352 | { | |
3aee8918 PA |
353 | memset (register_data (regcache, n, 0), 0, |
354 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
355 | #ifndef IN_PROCESS_AGENT |
356 | if (regcache->register_status != NULL) | |
357 | regcache->register_status[n] = REG_VALID; | |
358 | #endif | |
359 | } | |
360 | ||
361 | /* Supply the whole register set whose contents are stored in BUF, to | |
362 | REGCACHE. If BUF is NULL, all the registers' values are recorded | |
363 | as unavailable. */ | |
364 | ||
219f2f23 PA |
365 | void |
366 | supply_regblock (struct regcache *regcache, const void *buf) | |
367 | { | |
368 | if (buf) | |
1c79eb8a | 369 | { |
3aee8918 PA |
370 | const struct target_desc *tdesc = regcache->tdesc; |
371 | ||
372 | memcpy (regcache->registers, buf, tdesc->registers_size); | |
1c79eb8a PA |
373 | #ifndef IN_PROCESS_AGENT |
374 | { | |
375 | int i; | |
376 | ||
3aee8918 | 377 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
378 | regcache->register_status[i] = REG_VALID; |
379 | } | |
380 | #endif | |
381 | } | |
219f2f23 | 382 | else |
1c79eb8a | 383 | { |
3aee8918 PA |
384 | const struct target_desc *tdesc = regcache->tdesc; |
385 | ||
386 | memset (regcache->registers, 0, tdesc->registers_size); | |
1c79eb8a PA |
387 | #ifndef IN_PROCESS_AGENT |
388 | { | |
389 | int i; | |
390 | ||
3aee8918 | 391 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
392 | regcache->register_status[i] = REG_UNAVAILABLE; |
393 | } | |
394 | #endif | |
395 | } | |
219f2f23 PA |
396 | } |
397 | ||
fa593d66 PA |
398 | #ifndef IN_PROCESS_AGENT |
399 | ||
58caa3dc | 400 | void |
442ea881 PA |
401 | supply_register_by_name (struct regcache *regcache, |
402 | const char *name, const void *buf) | |
58caa3dc | 403 | { |
3aee8918 | 404 | supply_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc DJ |
405 | } |
406 | ||
fa593d66 PA |
407 | #endif |
408 | ||
58caa3dc | 409 | void |
442ea881 | 410 | collect_register (struct regcache *regcache, int n, void *buf) |
58caa3dc | 411 | { |
3aee8918 PA |
412 | memcpy (buf, register_data (regcache, n, 1), |
413 | register_size (regcache->tdesc, n)); | |
0d62e5e8 DJ |
414 | } |
415 | ||
fa593d66 PA |
416 | #ifndef IN_PROCESS_AGENT |
417 | ||
0d62e5e8 | 418 | void |
442ea881 | 419 | collect_register_as_string (struct regcache *regcache, int n, char *buf) |
0d62e5e8 | 420 | { |
3aee8918 PA |
421 | convert_int_to_ascii (register_data (regcache, n, 1), buf, |
422 | register_size (regcache->tdesc, n)); | |
58caa3dc DJ |
423 | } |
424 | ||
425 | void | |
442ea881 PA |
426 | collect_register_by_name (struct regcache *regcache, |
427 | const char *name, void *buf) | |
58caa3dc | 428 | { |
3aee8918 | 429 | collect_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc | 430 | } |
219f2f23 PA |
431 | |
432 | /* Special handling for register PC. */ | |
433 | ||
434 | CORE_ADDR | |
435 | regcache_read_pc (struct regcache *regcache) | |
436 | { | |
437 | CORE_ADDR pc_val; | |
438 | ||
439 | if (the_target->read_pc) | |
440 | pc_val = the_target->read_pc (regcache); | |
441 | else | |
442 | internal_error (__FILE__, __LINE__, | |
443 | "regcache_read_pc: Unable to find PC"); | |
444 | ||
445 | return pc_val; | |
446 | } | |
447 | ||
448 | void | |
449 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) | |
450 | { | |
451 | if (the_target->write_pc) | |
452 | the_target->write_pc (regcache, pc); | |
453 | else | |
454 | internal_error (__FILE__, __LINE__, | |
455 | "regcache_write_pc: Unable to update PC"); | |
456 | } | |
fa593d66 PA |
457 | |
458 | #endif |