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5796c8dc SS |
1 | /* Register groupings for GDB, the GNU debugger. |
2 | ||
25e4902b | 3 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
5796c8dc SS |
4 | |
5 | Contributed by Red Hat. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "arch-utils.h" | |
24 | #include "reggroups.h" | |
25 | #include "gdbtypes.h" | |
5796c8dc SS |
26 | #include "regcache.h" |
27 | #include "command.h" | |
28 | #include "gdbcmd.h" /* For maintenanceprintlist. */ | |
29 | ||
30 | /* Individual register groups. */ | |
31 | ||
32 | struct reggroup | |
33 | { | |
34 | const char *name; | |
35 | enum reggroup_type type; | |
36 | }; | |
37 | ||
38 | struct reggroup * | |
39 | reggroup_new (const char *name, enum reggroup_type type) | |
40 | { | |
25e4902b | 41 | struct reggroup *group = XNEW (struct reggroup); |
cf7f2e2d | 42 | |
5796c8dc SS |
43 | group->name = name; |
44 | group->type = type; | |
45 | return group; | |
46 | } | |
47 | ||
48 | /* Register group attributes. */ | |
49 | ||
50 | const char * | |
51 | reggroup_name (struct reggroup *group) | |
52 | { | |
53 | return group->name; | |
54 | } | |
55 | ||
56 | enum reggroup_type | |
57 | reggroup_type (struct reggroup *group) | |
58 | { | |
59 | return group->type; | |
60 | } | |
61 | ||
62 | /* A linked list of groups for the given architecture. */ | |
63 | ||
64 | struct reggroup_el | |
65 | { | |
66 | struct reggroup *group; | |
67 | struct reggroup_el *next; | |
68 | }; | |
69 | ||
70 | struct reggroups | |
71 | { | |
72 | struct reggroup_el *first; | |
73 | struct reggroup_el **last; | |
74 | }; | |
75 | ||
76 | static struct gdbarch_data *reggroups_data; | |
77 | ||
78 | static void * | |
79 | reggroups_init (struct gdbarch *gdbarch) | |
80 | { | |
81 | struct reggroups *groups = GDBARCH_OBSTACK_ZALLOC (gdbarch, | |
82 | struct reggroups); | |
cf7f2e2d | 83 | |
5796c8dc SS |
84 | groups->last = &groups->first; |
85 | return groups; | |
86 | } | |
87 | ||
88 | /* Add a register group (with attribute values) to the pre-defined | |
89 | list. */ | |
90 | ||
91 | static void | |
92 | add_group (struct reggroups *groups, struct reggroup *group, | |
93 | struct reggroup_el *el) | |
94 | { | |
95 | gdb_assert (group != NULL); | |
96 | el->group = group; | |
97 | el->next = NULL; | |
98 | (*groups->last) = el; | |
99 | groups->last = &el->next; | |
100 | } | |
101 | ||
102 | void | |
103 | reggroup_add (struct gdbarch *gdbarch, struct reggroup *group) | |
104 | { | |
105 | struct reggroups *groups = gdbarch_data (gdbarch, reggroups_data); | |
106 | ||
107 | if (groups == NULL) | |
108 | { | |
109 | /* ULGH, called during architecture initialization. Patch | |
110 | things up. */ | |
111 | groups = reggroups_init (gdbarch); | |
112 | deprecated_set_gdbarch_data (gdbarch, reggroups_data, groups); | |
113 | } | |
114 | add_group (groups, group, | |
115 | GDBARCH_OBSTACK_ZALLOC (gdbarch, struct reggroup_el)); | |
116 | } | |
117 | ||
118 | /* The default register groups for an architecture. */ | |
119 | ||
120 | static struct reggroups default_groups = { NULL, &default_groups.first }; | |
121 | ||
122 | /* A register group iterator. */ | |
123 | ||
124 | struct reggroup * | |
125 | reggroup_next (struct gdbarch *gdbarch, struct reggroup *last) | |
126 | { | |
127 | struct reggroups *groups; | |
128 | struct reggroup_el *el; | |
129 | ||
130 | /* Don't allow this function to be called during architecture | |
131 | creation. If there are no groups, use the default groups list. */ | |
132 | groups = gdbarch_data (gdbarch, reggroups_data); | |
133 | gdb_assert (groups != NULL); | |
134 | if (groups->first == NULL) | |
135 | groups = &default_groups; | |
136 | ||
137 | /* Return the first/next reggroup. */ | |
138 | if (last == NULL) | |
139 | return groups->first->group; | |
140 | for (el = groups->first; el != NULL; el = el->next) | |
141 | { | |
142 | if (el->group == last) | |
143 | { | |
144 | if (el->next != NULL) | |
145 | return el->next->group; | |
146 | else | |
147 | return NULL; | |
148 | } | |
149 | } | |
150 | return NULL; | |
151 | } | |
152 | ||
25e4902b AHJ |
153 | /* See reggroups.h. */ |
154 | ||
155 | struct reggroup * | |
156 | reggroup_prev (struct gdbarch *gdbarch, struct reggroup *curr) | |
157 | { | |
158 | struct reggroups *groups; | |
159 | struct reggroup_el *el; | |
160 | struct reggroup *prev; | |
161 | ||
162 | /* Don't allow this function to be called during architecture | |
163 | creation. If there are no groups, use the default groups list. */ | |
164 | groups = gdbarch_data (gdbarch, reggroups_data); | |
165 | gdb_assert (groups != NULL); | |
166 | if (groups->first == NULL) | |
167 | groups = &default_groups; | |
168 | ||
169 | prev = NULL; | |
170 | for (el = groups->first; el != NULL; el = el->next) | |
171 | { | |
172 | gdb_assert (el->group != NULL); | |
173 | if (el->group == curr) | |
174 | return prev; | |
175 | prev = el->group; | |
176 | } | |
177 | if (curr == NULL) | |
178 | return prev; | |
179 | return NULL; | |
180 | } | |
181 | ||
5796c8dc SS |
182 | /* Is REGNUM a member of REGGROUP? */ |
183 | int | |
184 | default_register_reggroup_p (struct gdbarch *gdbarch, int regnum, | |
185 | struct reggroup *group) | |
186 | { | |
187 | int vector_p; | |
188 | int float_p; | |
189 | int raw_p; | |
190 | ||
191 | if (gdbarch_register_name (gdbarch, regnum) == NULL | |
192 | || *gdbarch_register_name (gdbarch, regnum) == '\0') | |
193 | return 0; | |
194 | if (group == all_reggroup) | |
195 | return 1; | |
196 | vector_p = TYPE_VECTOR (register_type (gdbarch, regnum)); | |
197 | float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT; | |
198 | raw_p = regnum < gdbarch_num_regs (gdbarch); | |
199 | if (group == float_reggroup) | |
200 | return float_p; | |
201 | if (group == vector_reggroup) | |
202 | return vector_p; | |
203 | if (group == general_reggroup) | |
204 | return (!vector_p && !float_p); | |
205 | if (group == save_reggroup || group == restore_reggroup) | |
206 | return raw_p; | |
207 | return 0; | |
208 | } | |
209 | ||
210 | /* Dump out a table of register groups for the current architecture. */ | |
211 | ||
212 | static void | |
213 | reggroups_dump (struct gdbarch *gdbarch, struct ui_file *file) | |
214 | { | |
215 | struct reggroup *group = NULL; | |
216 | ||
217 | do | |
218 | { | |
219 | /* Group name. */ | |
220 | { | |
221 | const char *name; | |
cf7f2e2d | 222 | |
5796c8dc SS |
223 | if (group == NULL) |
224 | name = "Group"; | |
225 | else | |
226 | name = reggroup_name (group); | |
227 | fprintf_unfiltered (file, " %-10s", name); | |
228 | } | |
229 | ||
230 | /* Group type. */ | |
231 | { | |
232 | const char *type; | |
cf7f2e2d | 233 | |
5796c8dc SS |
234 | if (group == NULL) |
235 | type = "Type"; | |
236 | else | |
237 | { | |
238 | switch (reggroup_type (group)) | |
239 | { | |
240 | case USER_REGGROUP: | |
241 | type = "user"; | |
242 | break; | |
243 | case INTERNAL_REGGROUP: | |
244 | type = "internal"; | |
245 | break; | |
246 | default: | |
247 | internal_error (__FILE__, __LINE__, _("bad switch")); | |
248 | } | |
249 | } | |
250 | fprintf_unfiltered (file, " %-10s", type); | |
251 | } | |
252 | ||
253 | /* Note: If you change this, be sure to also update the | |
254 | documentation. */ | |
255 | ||
256 | fprintf_unfiltered (file, "\n"); | |
257 | ||
258 | group = reggroup_next (gdbarch, group); | |
259 | } | |
260 | while (group != NULL); | |
261 | } | |
262 | ||
263 | static void | |
264 | maintenance_print_reggroups (char *args, int from_tty) | |
265 | { | |
266 | struct gdbarch *gdbarch = get_current_arch (); | |
267 | ||
268 | if (args == NULL) | |
269 | reggroups_dump (gdbarch, gdb_stdout); | |
270 | else | |
271 | { | |
272 | struct cleanup *cleanups; | |
273 | struct ui_file *file = gdb_fopen (args, "w"); | |
cf7f2e2d | 274 | |
5796c8dc SS |
275 | if (file == NULL) |
276 | perror_with_name (_("maintenance print reggroups")); | |
277 | cleanups = make_cleanup_ui_file_delete (file); | |
278 | reggroups_dump (gdbarch, file); | |
279 | do_cleanups (cleanups); | |
280 | } | |
281 | } | |
282 | ||
283 | /* Pre-defined register groups. */ | |
284 | static struct reggroup general_group = { "general", USER_REGGROUP }; | |
285 | static struct reggroup float_group = { "float", USER_REGGROUP }; | |
286 | static struct reggroup system_group = { "system", USER_REGGROUP }; | |
287 | static struct reggroup vector_group = { "vector", USER_REGGROUP }; | |
288 | static struct reggroup all_group = { "all", USER_REGGROUP }; | |
289 | static struct reggroup save_group = { "save", INTERNAL_REGGROUP }; | |
290 | static struct reggroup restore_group = { "restore", INTERNAL_REGGROUP }; | |
291 | ||
292 | struct reggroup *const general_reggroup = &general_group; | |
293 | struct reggroup *const float_reggroup = &float_group; | |
294 | struct reggroup *const system_reggroup = &system_group; | |
295 | struct reggroup *const vector_reggroup = &vector_group; | |
296 | struct reggroup *const all_reggroup = &all_group; | |
297 | struct reggroup *const save_reggroup = &save_group; | |
298 | struct reggroup *const restore_reggroup = &restore_group; | |
299 | ||
300 | extern initialize_file_ftype _initialize_reggroup; /* -Wmissing-prototypes */ | |
301 | ||
302 | void | |
303 | _initialize_reggroup (void) | |
304 | { | |
305 | reggroups_data = gdbarch_data_register_post_init (reggroups_init); | |
306 | ||
307 | /* The pre-defined list of groups. */ | |
25e4902b AHJ |
308 | add_group (&default_groups, general_reggroup, XNEW (struct reggroup_el)); |
309 | add_group (&default_groups, float_reggroup, XNEW (struct reggroup_el)); | |
310 | add_group (&default_groups, system_reggroup, XNEW (struct reggroup_el)); | |
311 | add_group (&default_groups, vector_reggroup, XNEW (struct reggroup_el)); | |
312 | add_group (&default_groups, all_reggroup, XNEW (struct reggroup_el)); | |
313 | add_group (&default_groups, save_reggroup, XNEW (struct reggroup_el)); | |
314 | add_group (&default_groups, restore_reggroup, XNEW (struct reggroup_el)); | |
5796c8dc SS |
315 | |
316 | add_cmd ("reggroups", class_maintenance, | |
317 | maintenance_print_reggroups, _("\ | |
318 | Print the internal register group names.\n\ | |
319 | Takes an optional file parameter."), | |
320 | &maintenanceprintlist); | |
321 | ||
322 | } |