Commit | Line | Data |
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0a30fbc4 | 1 | /* Register support routines for the remote server for GDB. |
9b254dd1 DJ |
2 | Copyright (C) 2001, 2002, 2004, 2005, 2007, 2008 |
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 | ||
a7f48742 DJ |
26 | /* The private data for the register cache. Note that we have one |
27 | per inferior; this is primarily for simplicity, as the performance | |
28 | benefit is minimal. */ | |
29 | ||
c04a1aa8 DJ |
30 | struct inferior_regcache_data |
31 | { | |
0d62e5e8 | 32 | int registers_valid; |
f450004a | 33 | unsigned char *registers; |
c04a1aa8 DJ |
34 | }; |
35 | ||
0a30fbc4 DJ |
36 | static int register_bytes; |
37 | ||
38 | static struct reg *reg_defs; | |
39 | static int num_registers; | |
40 | ||
41 | const char **gdbserver_expedite_regs; | |
42 | ||
c04a1aa8 | 43 | static struct inferior_regcache_data * |
0d62e5e8 | 44 | get_regcache (struct thread_info *inf, int fetch) |
c04a1aa8 DJ |
45 | { |
46 | struct inferior_regcache_data *regcache; | |
47 | ||
48 | regcache = (struct inferior_regcache_data *) inferior_regcache_data (inf); | |
49 | ||
50 | if (regcache == NULL) | |
51 | fatal ("no register cache"); | |
52 | ||
0d62e5e8 DJ |
53 | /* FIXME - fetch registers for INF */ |
54 | if (fetch && regcache->registers_valid == 0) | |
55 | { | |
56 | fetch_inferior_registers (0); | |
57 | regcache->registers_valid = 1; | |
58 | } | |
59 | ||
c04a1aa8 DJ |
60 | return regcache; |
61 | } | |
62 | ||
0d62e5e8 DJ |
63 | void |
64 | regcache_invalidate_one (struct inferior_list_entry *entry) | |
65 | { | |
66 | struct thread_info *thread = (struct thread_info *) entry; | |
67 | struct inferior_regcache_data *regcache; | |
68 | ||
69 | regcache = (struct inferior_regcache_data *) inferior_regcache_data (thread); | |
70 | ||
71 | if (regcache->registers_valid) | |
72 | { | |
73 | struct thread_info *saved_inferior = current_inferior; | |
74 | ||
75 | current_inferior = thread; | |
76 | store_inferior_registers (-1); | |
77 | current_inferior = saved_inferior; | |
78 | } | |
79 | ||
80 | regcache->registers_valid = 0; | |
81 | } | |
82 | ||
83 | void | |
84 | regcache_invalidate () | |
85 | { | |
86 | for_each_inferior (&all_threads, regcache_invalidate_one); | |
87 | } | |
88 | ||
0d62e5e8 DJ |
89 | void * |
90 | new_register_cache (void) | |
c04a1aa8 DJ |
91 | { |
92 | struct inferior_regcache_data *regcache; | |
93 | ||
94 | regcache = malloc (sizeof (*regcache)); | |
95 | ||
2a68b70e DJ |
96 | /* Make sure to zero-initialize the register cache when it is created, |
97 | in case there are registers the target never fetches. This way they'll | |
98 | read as zero instead of garbage. */ | |
99 | regcache->registers = calloc (1, register_bytes); | |
c04a1aa8 DJ |
100 | if (regcache->registers == NULL) |
101 | fatal ("Could not allocate register cache."); | |
102 | ||
0d62e5e8 DJ |
103 | regcache->registers_valid = 0; |
104 | ||
105 | return regcache; | |
c04a1aa8 DJ |
106 | } |
107 | ||
108 | void | |
0d62e5e8 | 109 | free_register_cache (void *regcache_p) |
c04a1aa8 | 110 | { |
0d62e5e8 DJ |
111 | struct inferior_regcache_data *regcache |
112 | = (struct inferior_regcache_data *) regcache_p; | |
113 | ||
114 | free (regcache->registers); | |
115 | free (regcache); | |
c04a1aa8 DJ |
116 | } |
117 | ||
d61ddec4 UW |
118 | static void |
119 | realloc_register_cache (struct inferior_list_entry *thread_p) | |
120 | { | |
121 | struct thread_info *thread = (struct thread_info *) thread_p; | |
122 | ||
123 | free_register_cache (inferior_regcache_data (thread)); | |
124 | set_inferior_regcache_data (thread, new_register_cache ()); | |
125 | } | |
126 | ||
0a30fbc4 DJ |
127 | void |
128 | set_register_cache (struct reg *regs, int n) | |
129 | { | |
130 | int offset, i; | |
131 | ||
132 | reg_defs = regs; | |
133 | num_registers = n; | |
134 | ||
135 | offset = 0; | |
136 | for (i = 0; i < n; i++) | |
137 | { | |
138 | regs[i].offset = offset; | |
139 | offset += regs[i].size; | |
140 | } | |
141 | ||
142 | register_bytes = offset / 8; | |
d61ddec4 | 143 | |
bb9c3d36 UW |
144 | /* Make sure PBUFSIZ is large enough to hold a full register packet. */ |
145 | if (2 * register_bytes + 32 > PBUFSIZ) | |
146 | fatal ("Register packet size exceeds PBUFSIZ."); | |
147 | ||
d61ddec4 UW |
148 | /* Re-allocate all pre-existing register caches. */ |
149 | for_each_inferior (&all_threads, realloc_register_cache); | |
0a30fbc4 DJ |
150 | } |
151 | ||
152 | void | |
153 | registers_to_string (char *buf) | |
154 | { | |
f450004a | 155 | unsigned char *registers = get_regcache (current_inferior, 1)->registers; |
c04a1aa8 | 156 | |
0a30fbc4 DJ |
157 | convert_int_to_ascii (registers, buf, register_bytes); |
158 | } | |
159 | ||
160 | void | |
161 | registers_from_string (char *buf) | |
162 | { | |
163 | int len = strlen (buf); | |
f450004a | 164 | unsigned char *registers = get_regcache (current_inferior, 1)->registers; |
0a30fbc4 DJ |
165 | |
166 | if (len != register_bytes * 2) | |
167 | { | |
168 | warning ("Wrong sized register packet (expected %d bytes, got %d)", 2*register_bytes, len); | |
169 | if (len > register_bytes * 2) | |
170 | len = register_bytes * 2; | |
171 | } | |
172 | convert_ascii_to_int (buf, registers, len / 2); | |
173 | } | |
174 | ||
175 | struct reg * | |
176 | find_register_by_name (const char *name) | |
177 | { | |
178 | int i; | |
179 | ||
180 | for (i = 0; i < num_registers; i++) | |
181 | if (!strcmp (name, reg_defs[i].name)) | |
182 | return ®_defs[i]; | |
183 | fatal ("Unknown register %s requested", name); | |
184 | return 0; | |
185 | } | |
186 | ||
187 | int | |
188 | find_regno (const char *name) | |
189 | { | |
190 | int i; | |
191 | ||
192 | for (i = 0; i < num_registers; i++) | |
193 | if (!strcmp (name, reg_defs[i].name)) | |
194 | return i; | |
195 | fatal ("Unknown register %s requested", name); | |
196 | return -1; | |
197 | } | |
198 | ||
199 | struct reg * | |
200 | find_register_by_number (int n) | |
201 | { | |
202 | return ®_defs[n]; | |
203 | } | |
204 | ||
205 | int | |
206 | register_size (int n) | |
207 | { | |
208 | return reg_defs[n].size / 8; | |
209 | } | |
210 | ||
f450004a | 211 | static unsigned char * |
0d62e5e8 | 212 | register_data (int n, int fetch) |
0a30fbc4 | 213 | { |
f450004a DJ |
214 | unsigned char *registers |
215 | = get_regcache (current_inferior, fetch)->registers; | |
c04a1aa8 | 216 | |
0a30fbc4 DJ |
217 | return registers + (reg_defs[n].offset / 8); |
218 | } | |
219 | ||
58caa3dc | 220 | void |
0729219d | 221 | supply_register (int n, const void *buf) |
58caa3dc | 222 | { |
0d62e5e8 | 223 | memcpy (register_data (n, 0), buf, register_size (n)); |
58caa3dc DJ |
224 | } |
225 | ||
226 | void | |
0729219d | 227 | supply_register_by_name (const char *name, const void *buf) |
58caa3dc DJ |
228 | { |
229 | supply_register (find_regno (name), buf); | |
230 | } | |
231 | ||
232 | void | |
0729219d | 233 | collect_register (int n, void *buf) |
58caa3dc | 234 | { |
0d62e5e8 DJ |
235 | memcpy (buf, register_data (n, 1), register_size (n)); |
236 | } | |
237 | ||
238 | void | |
239 | collect_register_as_string (int n, char *buf) | |
240 | { | |
241 | convert_int_to_ascii (register_data (n, 1), buf, register_size (n)); | |
58caa3dc DJ |
242 | } |
243 | ||
244 | void | |
0729219d | 245 | collect_register_by_name (const char *name, void *buf) |
58caa3dc DJ |
246 | { |
247 | collect_register (find_regno (name), buf); | |
248 | } |