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 | { | |
442ea881 PA |
52 | struct thread_info *saved_inferior = current_inferior; |
53 | ||
54 | current_inferior = thread; | |
55 | fetch_inferior_registers (regcache, -1); | |
56 | current_inferior = saved_inferior; | |
0d62e5e8 DJ |
57 | regcache->registers_valid = 1; |
58 | } | |
59 | ||
c04a1aa8 DJ |
60 | return regcache; |
61 | } | |
62 | ||
0d62e5e8 | 63 | void |
3aee8918 | 64 | regcache_invalidate_thread (struct thread_info *thread) |
0d62e5e8 | 65 | { |
442ea881 | 66 | struct regcache *regcache; |
0d62e5e8 | 67 | |
442ea881 | 68 | regcache = (struct regcache *) inferior_regcache_data (thread); |
0d62e5e8 | 69 | |
45ba0d02 PA |
70 | if (regcache == NULL) |
71 | return; | |
72 | ||
0d62e5e8 DJ |
73 | if (regcache->registers_valid) |
74 | { | |
75 | struct thread_info *saved_inferior = current_inferior; | |
76 | ||
77 | current_inferior = thread; | |
442ea881 | 78 | store_inferior_registers (regcache, -1); |
0d62e5e8 DJ |
79 | current_inferior = saved_inferior; |
80 | } | |
81 | ||
82 | regcache->registers_valid = 0; | |
83 | } | |
84 | ||
3aee8918 PA |
85 | static int |
86 | regcache_invalidate_one (struct inferior_list_entry *entry, | |
87 | void *pid_p) | |
88 | { | |
89 | struct thread_info *thread = (struct thread_info *) entry; | |
90 | int pid = *(int *) pid_p; | |
91 | ||
92 | /* Only invalidate the regcaches of threads of this process. */ | |
93 | if (ptid_get_pid (entry->id) == pid) | |
94 | regcache_invalidate_thread (thread); | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
0d62e5e8 | 99 | void |
442ea881 | 100 | regcache_invalidate (void) |
0d62e5e8 | 101 | { |
3aee8918 PA |
102 | /* Only update the threads of the current process. */ |
103 | int pid = ptid_get_pid (current_inferior->entry.id); | |
104 | ||
105 | find_inferior (&all_threads, regcache_invalidate_one, &pid); | |
0d62e5e8 DJ |
106 | } |
107 | ||
fa593d66 PA |
108 | #endif |
109 | ||
219f2f23 | 110 | struct regcache * |
3aee8918 PA |
111 | init_register_cache (struct regcache *regcache, |
112 | const struct target_desc *tdesc, | |
113 | unsigned char *regbuf) | |
219f2f23 PA |
114 | { |
115 | if (regbuf == NULL) | |
116 | { | |
87f6c4e3 | 117 | #ifndef IN_PROCESS_AGENT |
219f2f23 PA |
118 | /* Make sure to zero-initialize the register cache when it is |
119 | created, in case there are registers the target never | |
120 | fetches. This way they'll read as zero instead of | |
121 | garbage. */ | |
3aee8918 PA |
122 | regcache->tdesc = tdesc; |
123 | regcache->registers = xcalloc (1, tdesc->registers_size); | |
219f2f23 | 124 | regcache->registers_owned = 1; |
3aee8918 | 125 | regcache->register_status = xcalloc (1, tdesc->num_registers); |
1c79eb8a | 126 | gdb_assert (REG_UNAVAILABLE == 0); |
fa593d66 | 127 | #else |
38e08fca | 128 | gdb_assert_not_reached ("can't allocate memory from the heap"); |
fa593d66 | 129 | #endif |
87f6c4e3 GB |
130 | } |
131 | else | |
219f2f23 | 132 | { |
3aee8918 | 133 | regcache->tdesc = tdesc; |
219f2f23 PA |
134 | regcache->registers = regbuf; |
135 | regcache->registers_owned = 0; | |
1c79eb8a PA |
136 | #ifndef IN_PROCESS_AGENT |
137 | regcache->register_status = NULL; | |
138 | #endif | |
219f2f23 PA |
139 | } |
140 | ||
141 | regcache->registers_valid = 0; | |
142 | ||
143 | return regcache; | |
144 | } | |
145 | ||
fa593d66 PA |
146 | #ifndef IN_PROCESS_AGENT |
147 | ||
442ea881 | 148 | struct regcache * |
3aee8918 | 149 | new_register_cache (const struct target_desc *tdesc) |
c04a1aa8 | 150 | { |
442ea881 | 151 | struct regcache *regcache; |
c04a1aa8 | 152 | |
3aee8918 | 153 | gdb_assert (tdesc->registers_size != 0); |
5822d809 | 154 | |
bca929d3 | 155 | regcache = xmalloc (sizeof (*regcache)); |
3aee8918 | 156 | return init_register_cache (regcache, tdesc, NULL); |
c04a1aa8 DJ |
157 | } |
158 | ||
159 | void | |
442ea881 | 160 | free_register_cache (struct regcache *regcache) |
c04a1aa8 | 161 | { |
5822d809 PA |
162 | if (regcache) |
163 | { | |
fa593d66 PA |
164 | if (regcache->registers_owned) |
165 | free (regcache->registers); | |
1c79eb8a | 166 | free (regcache->register_status); |
5822d809 PA |
167 | free (regcache); |
168 | } | |
c04a1aa8 DJ |
169 | } |
170 | ||
fa593d66 PA |
171 | #endif |
172 | ||
219f2f23 PA |
173 | void |
174 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
175 | { | |
3aee8918 PA |
176 | gdb_assert (src != NULL && dst != NULL); |
177 | gdb_assert (src->tdesc == dst->tdesc); | |
178 | gdb_assert (src != dst); | |
179 | ||
180 | memcpy (dst->registers, src->registers, src->tdesc->registers_size); | |
1c79eb8a PA |
181 | #ifndef IN_PROCESS_AGENT |
182 | if (dst->register_status != NULL && src->register_status != NULL) | |
3aee8918 PA |
183 | memcpy (dst->register_status, src->register_status, |
184 | src->tdesc->num_registers); | |
1c79eb8a | 185 | #endif |
219f2f23 PA |
186 | dst->registers_valid = src->registers_valid; |
187 | } | |
188 | ||
219f2f23 | 189 | |
fa593d66 PA |
190 | #ifndef IN_PROCESS_AGENT |
191 | ||
0a30fbc4 | 192 | void |
442ea881 | 193 | registers_to_string (struct regcache *regcache, char *buf) |
0a30fbc4 | 194 | { |
442ea881 | 195 | unsigned char *registers = regcache->registers; |
3aee8918 | 196 | const struct target_desc *tdesc = regcache->tdesc; |
1c79eb8a | 197 | int i; |
c04a1aa8 | 198 | |
3aee8918 | 199 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
200 | { |
201 | if (regcache->register_status[i] == REG_VALID) | |
202 | { | |
e9371aff | 203 | bin2hex (registers, buf, register_size (tdesc, i)); |
3aee8918 | 204 | buf += register_size (tdesc, i) * 2; |
1c79eb8a PA |
205 | } |
206 | else | |
207 | { | |
3aee8918 PA |
208 | memset (buf, 'x', register_size (tdesc, i) * 2); |
209 | buf += register_size (tdesc, i) * 2; | |
1c79eb8a | 210 | } |
3aee8918 | 211 | registers += register_size (tdesc, i); |
1c79eb8a PA |
212 | } |
213 | *buf = '\0'; | |
0a30fbc4 DJ |
214 | } |
215 | ||
216 | void | |
442ea881 | 217 | registers_from_string (struct regcache *regcache, char *buf) |
0a30fbc4 DJ |
218 | { |
219 | int len = strlen (buf); | |
442ea881 | 220 | unsigned char *registers = regcache->registers; |
3aee8918 | 221 | const struct target_desc *tdesc = regcache->tdesc; |
0a30fbc4 | 222 | |
3aee8918 | 223 | if (len != tdesc->registers_size * 2) |
0a30fbc4 | 224 | { |
1b3f6016 | 225 | warning ("Wrong sized register packet (expected %d bytes, got %d)", |
3aee8918 PA |
226 | 2 * tdesc->registers_size, len); |
227 | if (len > tdesc->registers_size * 2) | |
228 | len = tdesc->registers_size * 2; | |
0a30fbc4 | 229 | } |
a7191e8b | 230 | hex2bin (buf, registers, len / 2); |
0a30fbc4 DJ |
231 | } |
232 | ||
233 | struct reg * | |
3aee8918 | 234 | find_register_by_name (const struct target_desc *tdesc, const char *name) |
0a30fbc4 DJ |
235 | { |
236 | int i; | |
237 | ||
3aee8918 PA |
238 | for (i = 0; i < tdesc->num_registers; i++) |
239 | if (strcmp (name, tdesc->reg_defs[i].name) == 0) | |
240 | return &tdesc->reg_defs[i]; | |
38e08fca GB |
241 | internal_error (__FILE__, __LINE__, "Unknown register %s requested", |
242 | name); | |
0a30fbc4 DJ |
243 | } |
244 | ||
245 | int | |
3aee8918 | 246 | find_regno (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) | |
0a30fbc4 | 252 | return i; |
38e08fca GB |
253 | internal_error (__FILE__, __LINE__, "Unknown register %s requested", |
254 | name); | |
0a30fbc4 DJ |
255 | } |
256 | ||
257 | struct reg * | |
3aee8918 | 258 | find_register_by_number (const struct target_desc *tdesc, int n) |
0a30fbc4 | 259 | { |
3aee8918 | 260 | return &tdesc->reg_defs[n]; |
0a30fbc4 DJ |
261 | } |
262 | ||
fa593d66 PA |
263 | #endif |
264 | ||
3aee8918 PA |
265 | #ifndef IN_PROCESS_AGENT |
266 | static void | |
267 | free_register_cache_thread (struct thread_info *thread) | |
268 | { | |
269 | struct regcache *regcache | |
270 | = (struct regcache *) inferior_regcache_data (thread); | |
271 | ||
272 | if (regcache != NULL) | |
273 | { | |
274 | regcache_invalidate_thread (thread); | |
275 | free_register_cache (regcache); | |
276 | set_inferior_regcache_data (thread, NULL); | |
277 | } | |
278 | } | |
279 | ||
280 | static void | |
281 | free_register_cache_thread_one (struct inferior_list_entry *entry) | |
282 | { | |
283 | struct thread_info *thread = (struct thread_info *) entry; | |
284 | ||
285 | free_register_cache_thread (thread); | |
286 | } | |
287 | ||
288 | void | |
289 | regcache_release (void) | |
290 | { | |
291 | /* Flush and release all pre-existing register caches. */ | |
292 | for_each_inferior (&all_threads, free_register_cache_thread_one); | |
293 | } | |
294 | #endif | |
295 | ||
0a30fbc4 | 296 | int |
3aee8918 | 297 | register_cache_size (const struct target_desc *tdesc) |
0a30fbc4 | 298 | { |
3aee8918 PA |
299 | return tdesc->registers_size; |
300 | } | |
301 | ||
302 | int | |
303 | register_size (const struct target_desc *tdesc, int n) | |
304 | { | |
305 | return tdesc->reg_defs[n].size / 8; | |
0a30fbc4 DJ |
306 | } |
307 | ||
f450004a | 308 | static unsigned char * |
442ea881 | 309 | register_data (struct regcache *regcache, int n, int fetch) |
0a30fbc4 | 310 | { |
3aee8918 | 311 | return regcache->registers + regcache->tdesc->reg_defs[n].offset / 8; |
0a30fbc4 DJ |
312 | } |
313 | ||
1c79eb8a PA |
314 | /* Supply register N, whose contents are stored in BUF, to REGCACHE. |
315 | If BUF is NULL, the register's value is recorded as | |
316 | unavailable. */ | |
317 | ||
58caa3dc | 318 | void |
442ea881 | 319 | supply_register (struct regcache *regcache, int n, const void *buf) |
58caa3dc | 320 | { |
3327ccf7 | 321 | if (buf) |
1c79eb8a | 322 | { |
3aee8918 PA |
323 | memcpy (register_data (regcache, n, 0), buf, |
324 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
325 | #ifndef IN_PROCESS_AGENT |
326 | if (regcache->register_status != NULL) | |
327 | regcache->register_status[n] = REG_VALID; | |
328 | #endif | |
329 | } | |
3327ccf7 | 330 | else |
1c79eb8a | 331 | { |
3aee8918 PA |
332 | memset (register_data (regcache, n, 0), 0, |
333 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
334 | #ifndef IN_PROCESS_AGENT |
335 | if (regcache->register_status != NULL) | |
336 | regcache->register_status[n] = REG_UNAVAILABLE; | |
337 | #endif | |
338 | } | |
58caa3dc DJ |
339 | } |
340 | ||
1c79eb8a PA |
341 | /* Supply register N with value zero to REGCACHE. */ |
342 | ||
343 | void | |
344 | supply_register_zeroed (struct regcache *regcache, int n) | |
345 | { | |
3aee8918 PA |
346 | memset (register_data (regcache, n, 0), 0, |
347 | register_size (regcache->tdesc, n)); | |
1c79eb8a PA |
348 | #ifndef IN_PROCESS_AGENT |
349 | if (regcache->register_status != NULL) | |
350 | regcache->register_status[n] = REG_VALID; | |
351 | #endif | |
352 | } | |
353 | ||
354 | /* Supply the whole register set whose contents are stored in BUF, to | |
355 | REGCACHE. If BUF is NULL, all the registers' values are recorded | |
356 | as unavailable. */ | |
357 | ||
219f2f23 PA |
358 | void |
359 | supply_regblock (struct regcache *regcache, const void *buf) | |
360 | { | |
361 | if (buf) | |
1c79eb8a | 362 | { |
3aee8918 PA |
363 | const struct target_desc *tdesc = regcache->tdesc; |
364 | ||
365 | memcpy (regcache->registers, buf, tdesc->registers_size); | |
1c79eb8a PA |
366 | #ifndef IN_PROCESS_AGENT |
367 | { | |
368 | int i; | |
369 | ||
3aee8918 | 370 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
371 | regcache->register_status[i] = REG_VALID; |
372 | } | |
373 | #endif | |
374 | } | |
219f2f23 | 375 | else |
1c79eb8a | 376 | { |
3aee8918 PA |
377 | const struct target_desc *tdesc = regcache->tdesc; |
378 | ||
379 | memset (regcache->registers, 0, tdesc->registers_size); | |
1c79eb8a PA |
380 | #ifndef IN_PROCESS_AGENT |
381 | { | |
382 | int i; | |
383 | ||
3aee8918 | 384 | for (i = 0; i < tdesc->num_registers; i++) |
1c79eb8a PA |
385 | regcache->register_status[i] = REG_UNAVAILABLE; |
386 | } | |
387 | #endif | |
388 | } | |
219f2f23 PA |
389 | } |
390 | ||
fa593d66 PA |
391 | #ifndef IN_PROCESS_AGENT |
392 | ||
58caa3dc | 393 | void |
442ea881 PA |
394 | supply_register_by_name (struct regcache *regcache, |
395 | const char *name, const void *buf) | |
58caa3dc | 396 | { |
3aee8918 | 397 | supply_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc DJ |
398 | } |
399 | ||
fa593d66 PA |
400 | #endif |
401 | ||
58caa3dc | 402 | void |
442ea881 | 403 | collect_register (struct regcache *regcache, int n, void *buf) |
58caa3dc | 404 | { |
3aee8918 PA |
405 | memcpy (buf, register_data (regcache, n, 1), |
406 | register_size (regcache->tdesc, n)); | |
0d62e5e8 DJ |
407 | } |
408 | ||
fa593d66 PA |
409 | #ifndef IN_PROCESS_AGENT |
410 | ||
0d62e5e8 | 411 | void |
442ea881 | 412 | collect_register_as_string (struct regcache *regcache, int n, char *buf) |
0d62e5e8 | 413 | { |
e9371aff TT |
414 | bin2hex (register_data (regcache, n, 1), buf, |
415 | register_size (regcache->tdesc, n)); | |
58caa3dc DJ |
416 | } |
417 | ||
418 | void | |
442ea881 PA |
419 | collect_register_by_name (struct regcache *regcache, |
420 | const char *name, void *buf) | |
58caa3dc | 421 | { |
3aee8918 | 422 | collect_register (regcache, find_regno (regcache->tdesc, name), buf); |
58caa3dc | 423 | } |
219f2f23 PA |
424 | |
425 | /* Special handling for register PC. */ | |
426 | ||
427 | CORE_ADDR | |
428 | regcache_read_pc (struct regcache *regcache) | |
429 | { | |
430 | CORE_ADDR pc_val; | |
431 | ||
432 | if (the_target->read_pc) | |
433 | pc_val = the_target->read_pc (regcache); | |
434 | else | |
435 | internal_error (__FILE__, __LINE__, | |
436 | "regcache_read_pc: Unable to find PC"); | |
437 | ||
438 | return pc_val; | |
439 | } | |
440 | ||
441 | void | |
442 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) | |
443 | { | |
444 | if (the_target->write_pc) | |
445 | the_target->write_pc (regcache, pc); | |
446 | else | |
447 | internal_error (__FILE__, __LINE__, | |
448 | "regcache_write_pc: Unable to update PC"); | |
449 | } | |
fa593d66 PA |
450 | |
451 | #endif |