gdb/reggroups.c

   1 /* Register groupings for GDB, the GNU debugger.
   2
   3    Copyright 2002 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 2 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, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 #include "defs.h"
  25 #include "reggroups.h"
  26 #include "gdbtypes.h"
  27 #include "gdb_assert.h"
  28 #include "regcache.h"
  29 #include "command.h"
  30 #include "gdbcmd.h"             /* For maintenanceprintlist.  */
  31
  32 /* Individual register groups.  */
  33
  34 struct reggroup
  35 {
  36   const char *name;
  37   enum reggroup_type type;
  38 };
  39
  40 struct reggroup *
  41 reggroup_new (const char *name, enum reggroup_type type)
  42 {
  43   struct reggroup *group = XMALLOC (struct reggroup);
  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 /* All the groups for a given architecture.  */
  64
  65 struct reggroups
  66 {
  67   int nr_group;
  68   struct reggroup **group;
  69 };
  70
  71 static struct gdbarch_data *reggroups_data;
  72
  73 static void *
  74 reggroups_init (struct gdbarch *gdbarch)
  75 {
  76   struct reggroups *groups = XMALLOC (struct reggroups);
  77   groups->nr_group = 0;
  78   groups->group = NULL;
  79   return groups;
  80 }
  81
  82 static void
  83 reggroups_free (struct gdbarch *gdbarch, void *data)
  84 {
  85   struct reggroups *groups = data;
  86   xfree (groups->group);
  87   xfree (groups);
  88 }
  89
  90 /* Add a register group (with attribute values) to the pre-defined
  91    list.  This function can be called during architecture
  92    initialization and hence needs to handle NULL architecture groups.  */
  93
  94 static void
  95 add_group (struct reggroups *groups, struct reggroup *group)
  96 {
  97   gdb_assert (group != NULL);
  98   groups->nr_group++;
  99   groups->group = xrealloc (groups->group, (sizeof (struct reggroup *)
 100                                             * (groups->nr_group + 1)));
 101   groups->group[groups->nr_group - 1] = group;
 102   groups->group[groups->nr_group] = NULL;
 103 }
 104
 105 void
 106 reggroup_add (struct gdbarch *gdbarch, struct reggroup *group)
 107 {
 108   struct reggroups *groups = gdbarch_data (gdbarch, reggroups_data);
 109   if (groups == NULL)
 110     {
 111       /* ULGH, called during architecture initialization.  Patch
 112          things up.  */
 113       groups = reggroups_init (gdbarch);
 114       set_gdbarch_data (gdbarch, reggroups_data, groups);
 115     }
 116   add_group (groups, group);
 117 }
 118
 119 /* The register groups for the current architecture.  Mumble something
 120    about the lifetime of the buffer....  */
 121
 122 static struct reggroups *default_groups;
 123
 124 struct reggroup * const*
 125 reggroups (struct gdbarch *gdbarch)
 126 {
 127   struct reggroups *groups = gdbarch_data (gdbarch, reggroups_data);
 128   /* Don't allow this function to be called during architecture
 129      creation.  */
 130   gdb_assert (groups != NULL);
 131   if (groups->group == NULL)
 132     return default_groups->group;
 133   else
 134     return groups->group;
 135 }
 136
 137 /* Is REGNUM a member of REGGROUP?  */
 138 int
 139 default_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
 140                              struct reggroup *group)
 141 {
 142   int vector_p;
 143   int float_p;
 144   int raw_p;
 145   if (REGISTER_NAME (regnum) == NULL
 146       || *REGISTER_NAME (regnum) == '\0')
 147     return 0;
 148   if (group == all_reggroup)
 149     return 1;
 150   vector_p = TYPE_VECTOR (register_type (gdbarch, regnum));
 151   float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT;
 152   /* FIXME: cagney/2003-04-13: Can't yet use gdbarch_num_regs
 153      (gdbarch), as not all architectures are multi-arch.  */
 154   raw_p = regnum < NUM_REGS;
 155   if (group == float_reggroup)
 156     return float_p;
 157   if (group == vector_reggroup)
 158     return vector_p;
 159   if (group == general_reggroup)
 160     return (!vector_p && !float_p);
 161   if (group == save_reggroup || group == restore_reggroup)
 162     return raw_p;
 163   return 0;
 164 }
 165
 166 /* Dump out a table of register groups for the current architecture.  */
 167
 168 static void
 169 reggroups_dump (struct gdbarch *gdbarch, struct ui_file *file)
 170 {
 171   struct reggroup *const *groups = reggroups (gdbarch);
 172   int i = -1;
 173   do
 174     {
 175       /* Group name.  */
 176       {
 177         const char *name;
 178         if (i < 0)
 179           name = "Group";
 180         else
 181           name = reggroup_name (groups[i]);
 182         fprintf_unfiltered (file, " %-10s", name);
 183       }
 184
 185       /* Group type.  */
 186       {
 187         const char *type;
 188         if (i < 0)
 189           type = "Type";
 190         else
 191           {
 192             switch (reggroup_type (groups[i]))
 193               {
 194               case USER_REGGROUP:
 195                 type = "user";
 196                 break;
 197               case INTERNAL_REGGROUP:
 198                 type = "internal";
 199                 break;
 200               default:
 201                 internal_error (__FILE__, __LINE__, "bad switch");
 202               }
 203           }
 204         fprintf_unfiltered (file, " %-10s", type);
 205       }
 206
 207       /* Note: If you change this, be sure to also update the
 208          documentation.  */
 209
 210       fprintf_unfiltered (file, "\n");
 211       i++;
 212     }
 213   while (groups[i] != NULL);
 214 }
 215
 216 static void
 217 maintenance_print_reggroups (char *args, int from_tty)
 218 {
 219   if (args == NULL)
 220     reggroups_dump (current_gdbarch, gdb_stdout);
 221   else
 222     {
 223       struct ui_file *file = gdb_fopen (args, "w");
 224       if (file == NULL)
 225         perror_with_name ("maintenance print reggroups");
 226       reggroups_dump (current_gdbarch, file);
 227       ui_file_delete (file);
 228     }
 229 }
 230
 231 /* Pre-defined register groups.  */
 232 static struct reggroup general_group = { "general", USER_REGGROUP };
 233 static struct reggroup float_group = { "float", USER_REGGROUP };
 234 static struct reggroup system_group = { "system", USER_REGGROUP };
 235 static struct reggroup vector_group = { "vector", USER_REGGROUP };
 236 static struct reggroup all_group = { "all", USER_REGGROUP };
 237 static struct reggroup save_group = { "save", INTERNAL_REGGROUP };
 238 static struct reggroup restore_group = { "restore", INTERNAL_REGGROUP };
 239
 240 struct reggroup *const general_reggroup = &general_group;
 241 struct reggroup *const float_reggroup = &float_group;
 242 struct reggroup *const system_reggroup = &system_group;
 243 struct reggroup *const vector_reggroup = &vector_group;
 244 struct reggroup *const all_reggroup = &all_group;
 245 struct reggroup *const save_reggroup = &save_group;
 246 struct reggroup *const restore_reggroup = &restore_group;
 247
 248 extern initialize_file_ftype _initialize_reggroup; /* -Wmissing-prototypes */
 249
 250 void
 251 _initialize_reggroup (void)
 252 {
 253   reggroups_data = register_gdbarch_data (reggroups_init, reggroups_free);
 254
 255   /* The pre-defined list of groups.  */
 256   default_groups = reggroups_init (NULL);
 257   add_group (default_groups, general_reggroup);
 258   add_group (default_groups, float_reggroup);
 259   add_group (default_groups, system_reggroup);
 260   add_group (default_groups, vector_reggroup);
 261   add_group (default_groups, all_reggroup);
 262   add_group (default_groups, save_reggroup);
 263   add_group (default_groups, restore_reggroup);
 264
 265
 266   add_cmd ("reggroups", class_maintenance,
 267            maintenance_print_reggroups, "\
 268 Print the internal register group names.\n\
 269 Takes an optional file parameter.",
 270            &maintenanceprintlist);
 271
 272 }