1 /* Register groupings for GDB, the GNU debugger. 2 3 Copyright (C) 2002-2013 Free Software Foundation, Inc. 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" 26 #include "gdb_assert.h" 27 #include "regcache.h" 28 #include "command.h" 29 #include "gdbcmd.h" /* For maintenanceprintlist. */ 30 31 /* Individual register groups. */ 32 33 struct reggroup 34 { 35 const char *name; 36 enum reggroup_type type; 37 }; 38 39 struct reggroup * 40 reggroup_new (const char *name, enum reggroup_type type) 41 { 42 struct reggroup *group = XMALLOC (struct reggroup); 43 44 group->name = name; 45 group->type = type; 46 return group; 47 } 48 49 /* Register group attributes. */ 50 51 const char * 52 reggroup_name (struct reggroup *group) 53 { 54 return group->name; 55 } 56 57 enum reggroup_type 58 reggroup_type (struct reggroup *group) 59 { 60 return group->type; 61 } 62 63 /* A linked list of groups for the given architecture. */ 64 65 struct reggroup_el 66 { 67 struct reggroup *group; 68 struct reggroup_el *next; 69 }; 70 71 struct reggroups 72 { 73 struct reggroup_el *first; 74 struct reggroup_el **last; 75 }; 76 77 static struct gdbarch_data *reggroups_data; 78 79 static void * 80 reggroups_init (struct gdbarch *gdbarch) 81 { 82 struct reggroups *groups = GDBARCH_OBSTACK_ZALLOC (gdbarch, 83 struct reggroups); 84 85 groups->last = &groups->first; 86 return groups; 87 } 88 89 /* Add a register group (with attribute values) to the pre-defined 90 list. */ 91 92 static void 93 add_group (struct reggroups *groups, struct reggroup *group, 94 struct reggroup_el *el) 95 { 96 gdb_assert (group != NULL); 97 el->group = group; 98 el->next = NULL; 99 (*groups->last) = el; 100 groups->last = &el->next; 101 } 102 103 void 104 reggroup_add (struct gdbarch *gdbarch, struct reggroup *group) 105 { 106 struct reggroups *groups = gdbarch_data (gdbarch, reggroups_data); 107 108 if (groups == NULL) 109 { 110 /* ULGH, called during architecture initialization. Patch 111 things up. */ 112 groups = reggroups_init (gdbarch); 113 deprecated_set_gdbarch_data (gdbarch, reggroups_data, groups); 114 } 115 add_group (groups, group, 116 GDBARCH_OBSTACK_ZALLOC (gdbarch, struct reggroup_el)); 117 } 118 119 /* The default register groups for an architecture. */ 120 121 static struct reggroups default_groups = { NULL, &default_groups.first }; 122 123 /* A register group iterator. */ 124 125 struct reggroup * 126 reggroup_next (struct gdbarch *gdbarch, struct reggroup *last) 127 { 128 struct reggroups *groups; 129 struct reggroup_el *el; 130 131 /* Don't allow this function to be called during architecture 132 creation. If there are no groups, use the default groups list. */ 133 groups = gdbarch_data (gdbarch, reggroups_data); 134 gdb_assert (groups != NULL); 135 if (groups->first == NULL) 136 groups = &default_groups; 137 138 /* Return the first/next reggroup. */ 139 if (last == NULL) 140 return groups->first->group; 141 for (el = groups->first; el != NULL; el = el->next) 142 { 143 if (el->group == last) 144 { 145 if (el->next != NULL) 146 return el->next->group; 147 else 148 return NULL; 149 } 150 } 151 return NULL; 152 } 153 154 /* Is REGNUM a member of REGGROUP? */ 155 int 156 default_register_reggroup_p (struct gdbarch *gdbarch, int regnum, 157 struct reggroup *group) 158 { 159 int vector_p; 160 int float_p; 161 int raw_p; 162 163 if (gdbarch_register_name (gdbarch, regnum) == NULL 164 || *gdbarch_register_name (gdbarch, regnum) == '\0') 165 return 0; 166 if (group == all_reggroup) 167 return 1; 168 vector_p = TYPE_VECTOR (register_type (gdbarch, regnum)); 169 float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT; 170 raw_p = regnum < gdbarch_num_regs (gdbarch); 171 if (group == float_reggroup) 172 return float_p; 173 if (group == vector_reggroup) 174 return vector_p; 175 if (group == general_reggroup) 176 return (!vector_p && !float_p); 177 if (group == save_reggroup || group == restore_reggroup) 178 return raw_p; 179 return 0; 180 } 181 182 /* Dump out a table of register groups for the current architecture. */ 183 184 static void 185 reggroups_dump (struct gdbarch *gdbarch, struct ui_file *file) 186 { 187 struct reggroup *group = NULL; 188 189 do 190 { 191 /* Group name. */ 192 { 193 const char *name; 194 195 if (group == NULL) 196 name = "Group"; 197 else 198 name = reggroup_name (group); 199 fprintf_unfiltered (file, " %-10s", name); 200 } 201 202 /* Group type. */ 203 { 204 const char *type; 205 206 if (group == NULL) 207 type = "Type"; 208 else 209 { 210 switch (reggroup_type (group)) 211 { 212 case USER_REGGROUP: 213 type = "user"; 214 break; 215 case INTERNAL_REGGROUP: 216 type = "internal"; 217 break; 218 default: 219 internal_error (__FILE__, __LINE__, _("bad switch")); 220 } 221 } 222 fprintf_unfiltered (file, " %-10s", type); 223 } 224 225 /* Note: If you change this, be sure to also update the 226 documentation. */ 227 228 fprintf_unfiltered (file, "\n"); 229 230 group = reggroup_next (gdbarch, group); 231 } 232 while (group != NULL); 233 } 234 235 static void 236 maintenance_print_reggroups (char *args, int from_tty) 237 { 238 struct gdbarch *gdbarch = get_current_arch (); 239 240 if (args == NULL) 241 reggroups_dump (gdbarch, gdb_stdout); 242 else 243 { 244 struct cleanup *cleanups; 245 struct ui_file *file = gdb_fopen (args, "w"); 246 247 if (file == NULL) 248 perror_with_name (_("maintenance print reggroups")); 249 cleanups = make_cleanup_ui_file_delete (file); 250 reggroups_dump (gdbarch, file); 251 do_cleanups (cleanups); 252 } 253 } 254 255 /* Pre-defined register groups. */ 256 static struct reggroup general_group = { "general", USER_REGGROUP }; 257 static struct reggroup float_group = { "float", USER_REGGROUP }; 258 static struct reggroup system_group = { "system", USER_REGGROUP }; 259 static struct reggroup vector_group = { "vector", USER_REGGROUP }; 260 static struct reggroup all_group = { "all", USER_REGGROUP }; 261 static struct reggroup save_group = { "save", INTERNAL_REGGROUP }; 262 static struct reggroup restore_group = { "restore", INTERNAL_REGGROUP }; 263 264 struct reggroup *const general_reggroup = &general_group; 265 struct reggroup *const float_reggroup = &float_group; 266 struct reggroup *const system_reggroup = &system_group; 267 struct reggroup *const vector_reggroup = &vector_group; 268 struct reggroup *const all_reggroup = &all_group; 269 struct reggroup *const save_reggroup = &save_group; 270 struct reggroup *const restore_reggroup = &restore_group; 271 272 extern initialize_file_ftype _initialize_reggroup; /* -Wmissing-prototypes */ 273 274 void 275 _initialize_reggroup (void) 276 { 277 reggroups_data = gdbarch_data_register_post_init (reggroups_init); 278 279 /* The pre-defined list of groups. */ 280 add_group (&default_groups, general_reggroup, XMALLOC (struct reggroup_el)); 281 add_group (&default_groups, float_reggroup, XMALLOC (struct reggroup_el)); 282 add_group (&default_groups, system_reggroup, XMALLOC (struct reggroup_el)); 283 add_group (&default_groups, vector_reggroup, XMALLOC (struct reggroup_el)); 284 add_group (&default_groups, all_reggroup, XMALLOC (struct reggroup_el)); 285 add_group (&default_groups, save_reggroup, XMALLOC (struct reggroup_el)); 286 add_group (&default_groups, restore_reggroup, XMALLOC (struct reggroup_el)); 287 288 add_cmd ("reggroups", class_maintenance, 289 maintenance_print_reggroups, _("\ 290 Print the internal register group names.\n\ 291 Takes an optional file parameter."), 292 &maintenanceprintlist); 293 294 } 295