Commit | Line | Data |
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0a30fbc4 | 1 | /* Register support routines for the remote server for GDB. |
7b6bb8da | 2 | Copyright (C) 2001, 2002, 2004, 2005, 2007, 2008, 2009, 2010, 2011 |
9b254dd1 | 3 | Free Software Foundation, Inc. |
0a30fbc4 DJ |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
0a30fbc4 DJ |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
0a30fbc4 DJ |
19 | |
20 | #include "server.h" | |
21 | #include "regdef.h" | |
22 | ||
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | ||
0a30fbc4 DJ |
26 | static int register_bytes; |
27 | ||
28 | static struct reg *reg_defs; | |
29 | static int num_registers; | |
30 | ||
31 | const char **gdbserver_expedite_regs; | |
32 | ||
fa593d66 PA |
33 | #ifndef IN_PROCESS_AGENT |
34 | ||
442ea881 PA |
35 | struct regcache * |
36 | get_thread_regcache (struct thread_info *thread, int fetch) | |
c04a1aa8 | 37 | { |
442ea881 | 38 | struct regcache *regcache; |
c04a1aa8 | 39 | |
442ea881 | 40 | regcache = (struct regcache *) inferior_regcache_data (thread); |
c04a1aa8 DJ |
41 | |
42 | if (regcache == NULL) | |
43 | fatal ("no register cache"); | |
44 | ||
0d62e5e8 DJ |
45 | if (fetch && regcache->registers_valid == 0) |
46 | { | |
442ea881 PA |
47 | struct thread_info *saved_inferior = current_inferior; |
48 | ||
49 | current_inferior = thread; | |
50 | fetch_inferior_registers (regcache, -1); | |
51 | current_inferior = saved_inferior; | |
0d62e5e8 DJ |
52 | regcache->registers_valid = 1; |
53 | } | |
54 | ||
c04a1aa8 DJ |
55 | return regcache; |
56 | } | |
57 | ||
0d62e5e8 DJ |
58 | void |
59 | regcache_invalidate_one (struct inferior_list_entry *entry) | |
60 | { | |
61 | struct thread_info *thread = (struct thread_info *) entry; | |
442ea881 | 62 | struct regcache *regcache; |
0d62e5e8 | 63 | |
442ea881 | 64 | regcache = (struct regcache *) inferior_regcache_data (thread); |
0d62e5e8 | 65 | |
45ba0d02 PA |
66 | if (regcache == NULL) |
67 | return; | |
68 | ||
0d62e5e8 DJ |
69 | if (regcache->registers_valid) |
70 | { | |
71 | struct thread_info *saved_inferior = current_inferior; | |
72 | ||
73 | current_inferior = thread; | |
442ea881 | 74 | store_inferior_registers (regcache, -1); |
0d62e5e8 DJ |
75 | current_inferior = saved_inferior; |
76 | } | |
77 | ||
78 | regcache->registers_valid = 0; | |
79 | } | |
80 | ||
81 | void | |
442ea881 | 82 | regcache_invalidate (void) |
0d62e5e8 DJ |
83 | { |
84 | for_each_inferior (&all_threads, regcache_invalidate_one); | |
85 | } | |
86 | ||
fa593d66 PA |
87 | #endif |
88 | ||
219f2f23 PA |
89 | struct regcache * |
90 | init_register_cache (struct regcache *regcache, unsigned char *regbuf) | |
91 | { | |
fa593d66 | 92 | #ifndef IN_PROCESS_AGENT |
219f2f23 PA |
93 | if (regbuf == NULL) |
94 | { | |
95 | /* Make sure to zero-initialize the register cache when it is | |
96 | created, in case there are registers the target never | |
97 | fetches. This way they'll read as zero instead of | |
98 | garbage. */ | |
99 | regcache->registers = xcalloc (1, register_bytes); | |
100 | regcache->registers_owned = 1; | |
101 | } | |
102 | else | |
fa593d66 PA |
103 | #else |
104 | if (regbuf == NULL) | |
105 | fatal ("init_register_cache: can't allocate memory from the heap"); | |
106 | else | |
107 | #endif | |
219f2f23 PA |
108 | { |
109 | regcache->registers = regbuf; | |
110 | regcache->registers_owned = 0; | |
111 | } | |
112 | ||
113 | regcache->registers_valid = 0; | |
114 | ||
115 | return regcache; | |
116 | } | |
117 | ||
fa593d66 PA |
118 | #ifndef IN_PROCESS_AGENT |
119 | ||
442ea881 | 120 | struct regcache * |
0d62e5e8 | 121 | new_register_cache (void) |
c04a1aa8 | 122 | { |
442ea881 | 123 | struct regcache *regcache; |
c04a1aa8 | 124 | |
5822d809 PA |
125 | if (register_bytes == 0) |
126 | return NULL; /* The architecture hasn't been initialized yet. */ | |
127 | ||
bca929d3 | 128 | regcache = xmalloc (sizeof (*regcache)); |
219f2f23 | 129 | return init_register_cache (regcache, NULL); |
c04a1aa8 DJ |
130 | } |
131 | ||
132 | void | |
442ea881 | 133 | free_register_cache (struct regcache *regcache) |
c04a1aa8 | 134 | { |
5822d809 PA |
135 | if (regcache) |
136 | { | |
fa593d66 PA |
137 | if (regcache->registers_owned) |
138 | free (regcache->registers); | |
5822d809 PA |
139 | free (regcache); |
140 | } | |
c04a1aa8 DJ |
141 | } |
142 | ||
fa593d66 PA |
143 | #endif |
144 | ||
219f2f23 PA |
145 | void |
146 | regcache_cpy (struct regcache *dst, struct regcache *src) | |
147 | { | |
148 | memcpy (dst->registers, src->registers, register_bytes); | |
149 | dst->registers_valid = src->registers_valid; | |
150 | } | |
151 | ||
fa593d66 | 152 | #ifndef IN_PROCESS_AGENT |
d61ddec4 UW |
153 | static void |
154 | realloc_register_cache (struct inferior_list_entry *thread_p) | |
155 | { | |
156 | struct thread_info *thread = (struct thread_info *) thread_p; | |
442ea881 PA |
157 | struct regcache *regcache |
158 | = (struct regcache *) inferior_regcache_data (thread); | |
d61ddec4 | 159 | |
5d267c4c PA |
160 | if (regcache != NULL) |
161 | regcache_invalidate_one (thread_p); | |
442ea881 | 162 | free_register_cache (regcache); |
d61ddec4 UW |
163 | set_inferior_regcache_data (thread, new_register_cache ()); |
164 | } | |
fa593d66 | 165 | #endif |
d61ddec4 | 166 | |
0a30fbc4 DJ |
167 | void |
168 | set_register_cache (struct reg *regs, int n) | |
169 | { | |
170 | int offset, i; | |
1b3f6016 | 171 | |
fa593d66 | 172 | #ifndef IN_PROCESS_AGENT |
45ba0d02 PA |
173 | /* Before changing the register cache internal layout, flush the |
174 | contents of valid caches back to the threads. */ | |
175 | regcache_invalidate (); | |
fa593d66 | 176 | #endif |
45ba0d02 | 177 | |
0a30fbc4 DJ |
178 | reg_defs = regs; |
179 | num_registers = n; | |
180 | ||
181 | offset = 0; | |
182 | for (i = 0; i < n; i++) | |
183 | { | |
184 | regs[i].offset = offset; | |
185 | offset += regs[i].size; | |
186 | } | |
187 | ||
188 | register_bytes = offset / 8; | |
d61ddec4 | 189 | |
bb9c3d36 UW |
190 | /* Make sure PBUFSIZ is large enough to hold a full register packet. */ |
191 | if (2 * register_bytes + 32 > PBUFSIZ) | |
192 | fatal ("Register packet size exceeds PBUFSIZ."); | |
193 | ||
fa593d66 | 194 | #ifndef IN_PROCESS_AGENT |
d61ddec4 UW |
195 | /* Re-allocate all pre-existing register caches. */ |
196 | for_each_inferior (&all_threads, realloc_register_cache); | |
fa593d66 | 197 | #endif |
0a30fbc4 DJ |
198 | } |
199 | ||
219f2f23 PA |
200 | int |
201 | register_cache_size (void) | |
202 | { | |
203 | return register_bytes; | |
204 | } | |
205 | ||
fa593d66 PA |
206 | #ifndef IN_PROCESS_AGENT |
207 | ||
0a30fbc4 | 208 | void |
442ea881 | 209 | registers_to_string (struct regcache *regcache, char *buf) |
0a30fbc4 | 210 | { |
442ea881 | 211 | unsigned char *registers = regcache->registers; |
c04a1aa8 | 212 | |
0a30fbc4 DJ |
213 | convert_int_to_ascii (registers, buf, register_bytes); |
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; |
0a30fbc4 DJ |
221 | |
222 | if (len != register_bytes * 2) | |
223 | { | |
1b3f6016 PA |
224 | warning ("Wrong sized register packet (expected %d bytes, got %d)", |
225 | 2*register_bytes, len); | |
0a30fbc4 DJ |
226 | if (len > register_bytes * 2) |
227 | len = register_bytes * 2; | |
228 | } | |
229 | convert_ascii_to_int (buf, registers, len / 2); | |
230 | } | |
231 | ||
232 | struct reg * | |
233 | find_register_by_name (const char *name) | |
234 | { | |
235 | int i; | |
236 | ||
237 | for (i = 0; i < num_registers; i++) | |
238 | if (!strcmp (name, reg_defs[i].name)) | |
239 | return ®_defs[i]; | |
240 | fatal ("Unknown register %s requested", name); | |
241 | return 0; | |
242 | } | |
243 | ||
244 | int | |
245 | find_regno (const char *name) | |
246 | { | |
247 | int i; | |
248 | ||
249 | for (i = 0; i < num_registers; i++) | |
250 | if (!strcmp (name, reg_defs[i].name)) | |
251 | return i; | |
252 | fatal ("Unknown register %s requested", name); | |
253 | return -1; | |
254 | } | |
255 | ||
256 | struct reg * | |
257 | find_register_by_number (int n) | |
258 | { | |
259 | return ®_defs[n]; | |
260 | } | |
261 | ||
fa593d66 PA |
262 | #endif |
263 | ||
0a30fbc4 DJ |
264 | int |
265 | register_size (int n) | |
266 | { | |
267 | return reg_defs[n].size / 8; | |
268 | } | |
269 | ||
f450004a | 270 | static unsigned char * |
442ea881 | 271 | register_data (struct regcache *regcache, int n, int fetch) |
0a30fbc4 | 272 | { |
442ea881 | 273 | return regcache->registers + (reg_defs[n].offset / 8); |
0a30fbc4 DJ |
274 | } |
275 | ||
58caa3dc | 276 | void |
442ea881 | 277 | supply_register (struct regcache *regcache, int n, const void *buf) |
58caa3dc | 278 | { |
3327ccf7 L |
279 | if (buf) |
280 | memcpy (register_data (regcache, n, 0), buf, register_size (n)); | |
281 | else | |
282 | memset (register_data (regcache, n, 0), 0, register_size (n)); | |
58caa3dc DJ |
283 | } |
284 | ||
219f2f23 PA |
285 | void |
286 | supply_regblock (struct regcache *regcache, const void *buf) | |
287 | { | |
288 | if (buf) | |
289 | memcpy (regcache->registers, buf, register_bytes); | |
290 | else | |
291 | memset (regcache->registers, 0, register_bytes); | |
292 | } | |
293 | ||
fa593d66 PA |
294 | #ifndef IN_PROCESS_AGENT |
295 | ||
58caa3dc | 296 | void |
442ea881 PA |
297 | supply_register_by_name (struct regcache *regcache, |
298 | const char *name, const void *buf) | |
58caa3dc | 299 | { |
442ea881 | 300 | supply_register (regcache, find_regno (name), buf); |
58caa3dc DJ |
301 | } |
302 | ||
fa593d66 PA |
303 | #endif |
304 | ||
58caa3dc | 305 | void |
442ea881 | 306 | collect_register (struct regcache *regcache, int n, void *buf) |
58caa3dc | 307 | { |
442ea881 | 308 | memcpy (buf, register_data (regcache, n, 1), register_size (n)); |
0d62e5e8 DJ |
309 | } |
310 | ||
fa593d66 PA |
311 | #ifndef IN_PROCESS_AGENT |
312 | ||
0d62e5e8 | 313 | void |
442ea881 | 314 | collect_register_as_string (struct regcache *regcache, int n, char *buf) |
0d62e5e8 | 315 | { |
442ea881 PA |
316 | convert_int_to_ascii (register_data (regcache, n, 1), |
317 | buf, register_size (n)); | |
58caa3dc DJ |
318 | } |
319 | ||
320 | void | |
442ea881 PA |
321 | collect_register_by_name (struct regcache *regcache, |
322 | const char *name, void *buf) | |
58caa3dc | 323 | { |
442ea881 | 324 | collect_register (regcache, find_regno (name), buf); |
58caa3dc | 325 | } |
219f2f23 PA |
326 | |
327 | /* Special handling for register PC. */ | |
328 | ||
329 | CORE_ADDR | |
330 | regcache_read_pc (struct regcache *regcache) | |
331 | { | |
332 | CORE_ADDR pc_val; | |
333 | ||
334 | if (the_target->read_pc) | |
335 | pc_val = the_target->read_pc (regcache); | |
336 | else | |
337 | internal_error (__FILE__, __LINE__, | |
338 | "regcache_read_pc: Unable to find PC"); | |
339 | ||
340 | return pc_val; | |
341 | } | |
342 | ||
343 | void | |
344 | regcache_write_pc (struct regcache *regcache, CORE_ADDR pc) | |
345 | { | |
346 | if (the_target->write_pc) | |
347 | the_target->write_pc (regcache, pc); | |
348 | else | |
349 | internal_error (__FILE__, __LINE__, | |
350 | "regcache_write_pc: Unable to update PC"); | |
351 | } | |
fa593d66 PA |
352 | |
353 | #endif |