aboutsummaryrefslogtreecommitdiff
path: root/gdb/reggroups.c
blob: 887658d662f3e0c98c85168b7117554c137bf5cc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
/* Register groupings for GDB, the GNU debugger.

   Copyright (C) 2002, 2003 Free Software Foundation, Inc.

   Contributed by Red Hat.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.  */

#include "defs.h"
#include "reggroups.h"
#include "gdbtypes.h"
#include "gdb_assert.h"
#include "regcache.h"
#include "command.h"
#include "gdbcmd.h"		/* For maintenanceprintlist.  */

/* Individual register groups.  */

struct reggroup
{
  const char *name;
  enum reggroup_type type;
};

struct reggroup *
reggroup_new (const char *name, enum reggroup_type type)
{
  struct reggroup *group = XMALLOC (struct reggroup);
  group->name = name;
  group->type = type;
  return group;
}

/* Register group attributes.  */

const char *
reggroup_name (struct reggroup *group)
{
  return group->name;
}

enum reggroup_type
reggroup_type (struct reggroup *group)
{
  return group->type;
}

/* A linked list of groups for the given architecture.  */

struct reggroup_el
{
  struct reggroup *group;
  struct reggroup_el *next;
};

struct reggroups
{
  struct reggroup_el *first;
  struct reggroup_el **last;
};

static struct gdbarch_data *reggroups_data;

static void *
reggroups_init (struct gdbarch *gdbarch)
{
  struct reggroups *groups = GDBARCH_OBSTACK_ZALLOC (gdbarch,
						     struct reggroups);
  groups->last = &groups->first;
  return groups;
}

/* Add a register group (with attribute values) to the pre-defined
   list.  */

static void
add_group (struct reggroups *groups, struct reggroup *group,
	   struct reggroup_el *el)
{
  gdb_assert (group != NULL);
  el->group = group;
  el->next = NULL;
  (*groups->last) = el;
  groups->last = &el->next;
}

void
reggroup_add (struct gdbarch *gdbarch, struct reggroup *group)
{
  struct reggroups *groups = gdbarch_data (gdbarch, reggroups_data);

  if (groups == NULL)
    {
      /* ULGH, called during architecture initialization.  Patch
         things up.  */
      groups = reggroups_init (gdbarch);
      deprecated_set_gdbarch_data (gdbarch, reggroups_data, groups);
    }
  add_group (groups, group,
	     GDBARCH_OBSTACK_ZALLOC (gdbarch, struct reggroup_el));
}

/* The default register groups for an architecture.  */

static struct reggroups default_groups = { NULL, &default_groups.first };

/* A register group iterator.  */

struct reggroup *
reggroup_next (struct gdbarch *gdbarch, struct reggroup *last)
{
  struct reggroups *groups;
  struct reggroup_el *el;

  /* Don't allow this function to be called during architecture
     creation.  If there are no groups, use the default groups list.  */
  groups = gdbarch_data (gdbarch, reggroups_data);
  gdb_assert (groups != NULL);
  if (groups->first == NULL)
    groups = &default_groups;

  /* Return the first/next reggroup.  */
  if (last == NULL)
    return groups->first->group;
  for (el = groups->first; el != NULL; el = el->next)
    {
      if (el->group == last)
	{
	  if (el->next != NULL)
	    return el->next->group;
	  else
	    return NULL;
	}
    }
  return NULL;
}

/* Is REGNUM a member of REGGROUP?  */
int
default_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
			     struct reggroup *group)
{
  int vector_p;
  int float_p;
  int raw_p;

  if (REGISTER_NAME (regnum) == NULL
      || *REGISTER_NAME (regnum) == '\0')
    return 0;
  if (group == all_reggroup)
    return 1;
  vector_p = TYPE_VECTOR (register_type (gdbarch, regnum));
  float_p = TYPE_CODE (register_type (gdbarch, regnum)) == TYPE_CODE_FLT;
  /* FIXME: cagney/2003-04-13: Can't yet use gdbarch_num_regs
     (gdbarch), as not all architectures are multi-arch.  */
  raw_p = regnum < NUM_REGS;
  if (group == float_reggroup)
    return float_p;
  if (group == vector_reggroup)
    return vector_p;
  if (group == general_reggroup)
    return (!vector_p && !float_p);
  if (group == save_reggroup || group == restore_reggroup)
    return raw_p;
  return 0;   
}

/* Dump out a table of register groups for the current architecture.  */

static void
reggroups_dump (struct gdbarch *gdbarch, struct ui_file *file)
{
  struct reggroup *group = NULL;

  do
    {
      /* Group name.  */
      {
	const char *name;
	if (group == NULL)
	  name = "Group";
	else
	  name = reggroup_name (group);
	fprintf_unfiltered (file, " %-10s", name);
      }
      
      /* Group type.  */
      {
	const char *type;
	if (group == NULL)
	  type = "Type";
	else
	  {
	    switch (reggroup_type (group))
	      {
	      case USER_REGGROUP:
		type = "user";
		break;
	      case INTERNAL_REGGROUP:
		type = "internal";
		break;
	      default:
		internal_error (__FILE__, __LINE__, _("bad switch"));
	      }
	  }
	fprintf_unfiltered (file, " %-10s", type);
      }

      /* Note: If you change this, be sure to also update the
         documentation.  */
      
      fprintf_unfiltered (file, "\n");

      group = reggroup_next (gdbarch, group);
    }
  while (group != NULL);
}

static void
maintenance_print_reggroups (char *args, int from_tty)
{
  if (args == NULL)
    reggroups_dump (current_gdbarch, gdb_stdout);
  else
    {
      struct ui_file *file = gdb_fopen (args, "w");
      if (file == NULL)
	perror_with_name (_("maintenance print reggroups"));
      reggroups_dump (current_gdbarch, file);    
      ui_file_delete (file);
    }
}

/* Pre-defined register groups.  */
static struct reggroup general_group = { "general", USER_REGGROUP };
static struct reggroup float_group = { "float", USER_REGGROUP };
static struct reggroup system_group = { "system", USER_REGGROUP };
static struct reggroup vector_group = { "vector", USER_REGGROUP };
static struct reggroup all_group = { "all", USER_REGGROUP };
static struct reggroup save_group = { "save", INTERNAL_REGGROUP };
static struct reggroup restore_group = { "restore", INTERNAL_REGGROUP };

struct reggroup *const general_reggroup = &general_group;
struct reggroup *const float_reggroup = &float_group;
struct reggroup *const system_reggroup = &system_group;
struct reggroup *const vector_reggroup = &vector_group;
struct reggroup *const all_reggroup = &all_group;
struct reggroup *const save_reggroup = &save_group;
struct reggroup *const restore_reggroup = &restore_group;

extern initialize_file_ftype _initialize_reggroup; /* -Wmissing-prototypes */

void
_initialize_reggroup (void)
{
  reggroups_data = gdbarch_data_register_post_init (reggroups_init);

  /* The pre-defined list of groups.  */
  add_group (&default_groups, general_reggroup, XMALLOC (struct reggroup_el));
  add_group (&default_groups, float_reggroup, XMALLOC (struct reggroup_el));
  add_group (&default_groups, system_reggroup, XMALLOC (struct reggroup_el));
  add_group (&default_groups, vector_reggroup, XMALLOC (struct reggroup_el));
  add_group (&default_groups, all_reggroup, XMALLOC (struct reggroup_el));
  add_group (&default_groups, save_reggroup, XMALLOC (struct reggroup_el));
  add_group (&default_groups, restore_reggroup, XMALLOC (struct reggroup_el));

  add_cmd ("reggroups", class_maintenance,
	   maintenance_print_reggroups, _("\
Print the internal register group names.\n\
Takes an optional file parameter."),
	   &maintenanceprintlist);

}