aboutsummaryrefslogtreecommitdiff
path: root/gdb/gdbsupport/tdesc.c
blob: 1e2a3148132ce26458e61a4f376e91d73ee78c1c (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
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
/* Target description support for GDB.

   Copyright (C) 2018-2019 Free Software Foundation, Inc.

   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 3 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, see <http://www.gnu.org/licenses/>.  */

#include "common-defs.h"
#include "gdbsupport/tdesc.h"

tdesc_reg::tdesc_reg (struct tdesc_feature *feature, const std::string &name_,
		      int regnum, int save_restore_, const char *group_,
		      int bitsize_, const char *type_)
  : name (name_), target_regnum (regnum),
    save_restore (save_restore_),
    group (group_ != NULL ? group_ : ""),
    bitsize (bitsize_),
    type (type_ != NULL ? type_ : "<unknown>")
{
  /* If the register's type is target-defined, look it up now.  We may not
     have easy access to the containing feature when we want it later.  */
  tdesc_type = tdesc_named_type (feature, type.c_str ());
}

/* Predefined types.  */
static tdesc_type_builtin tdesc_predefined_types[] =
{
  { "bool", TDESC_TYPE_BOOL },
  { "int8", TDESC_TYPE_INT8 },
  { "int16", TDESC_TYPE_INT16 },
  { "int32", TDESC_TYPE_INT32 },
  { "int64", TDESC_TYPE_INT64 },
  { "int128", TDESC_TYPE_INT128 },
  { "uint8", TDESC_TYPE_UINT8 },
  { "uint16", TDESC_TYPE_UINT16 },
  { "uint32", TDESC_TYPE_UINT32 },
  { "uint64", TDESC_TYPE_UINT64 },
  { "uint128", TDESC_TYPE_UINT128 },
  { "code_ptr", TDESC_TYPE_CODE_PTR },
  { "data_ptr", TDESC_TYPE_DATA_PTR },
  { "ieee_half", TDESC_TYPE_IEEE_HALF },
  { "ieee_single", TDESC_TYPE_IEEE_SINGLE },
  { "ieee_double", TDESC_TYPE_IEEE_DOUBLE },
  { "arm_fpa_ext", TDESC_TYPE_ARM_FPA_EXT },
  { "i387_ext", TDESC_TYPE_I387_EXT }
};

void tdesc_feature::accept (tdesc_element_visitor &v) const
{
  v.visit_pre (this);

  for (const tdesc_type_up &type : types)
    type->accept (v);

  for (const tdesc_reg_up &reg : registers)
    reg->accept (v);

  v.visit_post (this);
}

bool tdesc_feature::operator== (const tdesc_feature &other) const
{
  if (name != other.name)
    return false;

  if (registers.size () != other.registers.size ())
    return false;

  for (int ix = 0; ix < registers.size (); ix++)
    {
      const tdesc_reg_up &reg1 = registers[ix];
      const tdesc_reg_up &reg2 = other.registers[ix];

      if (reg1 != reg2 && *reg1 != *reg2)
	return false;
      }

  if (types.size () != other.types.size ())
    return false;

  for (int ix = 0; ix < types.size (); ix++)
    {
      const tdesc_type_up &type1 = types[ix];
      const tdesc_type_up &type2 = other.types[ix];

      if (type1 != type2 && *type1 != *type2)
	return false;
    }

  return true;
}

/* Lookup a predefined type.  */

static struct tdesc_type *
tdesc_predefined_type (enum tdesc_type_kind kind)
{
  for (int ix = 0; ix < ARRAY_SIZE (tdesc_predefined_types); ix++)
    if (tdesc_predefined_types[ix].kind == kind)
      return &tdesc_predefined_types[ix];

  gdb_assert_not_reached ("bad predefined tdesc type");
}

/* See gdbsupport/tdesc.h.  */

struct tdesc_type *
tdesc_named_type (const struct tdesc_feature *feature, const char *id)
{
  /* First try target-defined types.  */
  for (const tdesc_type_up &type : feature->types)
    if (type->name == id)
      return type.get ();

  /* Next try the predefined types.  */
  for (int ix = 0; ix < ARRAY_SIZE (tdesc_predefined_types); ix++)
    if (tdesc_predefined_types[ix].name == id)
      return &tdesc_predefined_types[ix];

  return NULL;
}

/* See gdbsupport/tdesc.h.  */

void
tdesc_create_reg (struct tdesc_feature *feature, const char *name,
		  int regnum, int save_restore, const char *group,
		  int bitsize, const char *type)
{
  tdesc_reg *reg = new tdesc_reg (feature, name, regnum, save_restore,
				  group, bitsize, type);

  feature->registers.emplace_back (reg);
}

/* See gdbsupport/tdesc.h.  */

struct tdesc_type *
tdesc_create_vector (struct tdesc_feature *feature, const char *name,
		     struct tdesc_type *field_type, int count)
{
  tdesc_type_vector *type = new tdesc_type_vector (name, field_type, count);
  feature->types.emplace_back (type);

  return type;
}

/* See gdbsupport/tdesc.h.  */

tdesc_type_with_fields *
tdesc_create_struct (struct tdesc_feature *feature, const char *name)
{
  tdesc_type_with_fields *type
    = new tdesc_type_with_fields (name, TDESC_TYPE_STRUCT);
  feature->types.emplace_back (type);

  return type;
}

/* See gdbsupport/tdesc.h.  */

void
tdesc_set_struct_size (tdesc_type_with_fields *type, int size)
{
  gdb_assert (type->kind == TDESC_TYPE_STRUCT);
  gdb_assert (size > 0);
  type->size = size;
}

/* See gdbsupport/tdesc.h.  */

tdesc_type_with_fields *
tdesc_create_union (struct tdesc_feature *feature, const char *name)
{
  tdesc_type_with_fields *type
    = new tdesc_type_with_fields (name, TDESC_TYPE_UNION);
  feature->types.emplace_back (type);

  return type;
}

/* See gdbsupport/tdesc.h.  */

tdesc_type_with_fields *
tdesc_create_flags (struct tdesc_feature *feature, const char *name,
		    int size)
{
  gdb_assert (size > 0);

  tdesc_type_with_fields *type
    = new tdesc_type_with_fields (name, TDESC_TYPE_FLAGS, size);
  feature->types.emplace_back (type);

  return type;
}

/* See gdbsupport/tdesc.h.  */

tdesc_type_with_fields *
tdesc_create_enum (struct tdesc_feature *feature, const char *name,
		   int size)
{
  gdb_assert (size > 0);

  tdesc_type_with_fields *type
    = new tdesc_type_with_fields (name, TDESC_TYPE_ENUM, size);
  feature->types.emplace_back (type);

  return type;
}

/* See gdbsupport/tdesc.h.  */

void
tdesc_add_field (tdesc_type_with_fields *type, const char *field_name,
		 struct tdesc_type *field_type)
{
  gdb_assert (type->kind == TDESC_TYPE_UNION
	      || type->kind == TDESC_TYPE_STRUCT);

  /* Initialize start and end so we know this is not a bit-field
     when we print-c-tdesc.  */
  type->fields.emplace_back (field_name, field_type, -1, -1);
}

/* See gdbsupport/tdesc.h.  */

void
tdesc_add_typed_bitfield (tdesc_type_with_fields *type, const char *field_name,
			  int start, int end, struct tdesc_type *field_type)
{
  gdb_assert (type->kind == TDESC_TYPE_STRUCT
	      || type->kind == TDESC_TYPE_FLAGS);
  gdb_assert (start >= 0 && end >= start);

  type->fields.emplace_back (field_name, field_type, start, end);
}

/* See gdbsupport/tdesc.h.  */

void
tdesc_add_bitfield (tdesc_type_with_fields *type, const char *field_name,
		    int start, int end)
{
  struct tdesc_type *field_type;

  gdb_assert (start >= 0 && end >= start);

  if (type->size > 4)
    field_type = tdesc_predefined_type (TDESC_TYPE_UINT64);
  else
    field_type = tdesc_predefined_type (TDESC_TYPE_UINT32);

  tdesc_add_typed_bitfield (type, field_name, start, end, field_type);
}

/* See gdbsupport/tdesc.h.  */

void
tdesc_add_flag (tdesc_type_with_fields *type, int start,
		const char *flag_name)
{
  gdb_assert (type->kind == TDESC_TYPE_FLAGS
	      || type->kind == TDESC_TYPE_STRUCT);

  type->fields.emplace_back (flag_name,
			     tdesc_predefined_type (TDESC_TYPE_BOOL),
			     start, start);
}

/* See gdbsupport/tdesc.h.  */

void
tdesc_add_enum_value (tdesc_type_with_fields *type, int value,
		      const char *name)
{
  gdb_assert (type->kind == TDESC_TYPE_ENUM);
  type->fields.emplace_back (name,
			     tdesc_predefined_type (TDESC_TYPE_INT32),
			     value, -1);
}

void print_xml_feature::visit_pre (const tdesc_feature *e)
{
  string_appendf (*m_buffer, "<feature name=\"%s\">\n", e->name.c_str ());
}

void print_xml_feature::visit_post (const tdesc_feature *e)
{
  string_appendf (*m_buffer, "</feature>\n");
}

void print_xml_feature::visit (const tdesc_type_builtin *t)
{
  error (_("xml output is not supported for type \"%s\"."), t->name.c_str ());
}

void print_xml_feature::visit (const tdesc_type_vector *t)
{
  string_appendf (*m_buffer, "<vector id=\"%s\" type=\"%s\" count=\"%d\"/>\n",
		  t->name.c_str (), t->element_type->name.c_str (), t->count);
}

void print_xml_feature::visit (const tdesc_type_with_fields *t)
{
  const static char *types[] = { "struct", "union", "flags", "enum" };

  gdb_assert (t->kind >= TDESC_TYPE_STRUCT && t->kind <= TDESC_TYPE_ENUM);

  string_appendf (*m_buffer,
		  "<%s id=\"%s\"", types[t->kind - TDESC_TYPE_STRUCT],
		  t->name.c_str ());

  switch (t->kind)
    {
    case TDESC_TYPE_STRUCT:
    case TDESC_TYPE_FLAGS:
      if (t->size > 0)
	string_appendf (*m_buffer, " size=\"%d\"", t->size);
      string_appendf (*m_buffer, ">\n");

      for (const tdesc_type_field &f : t->fields)
	{
	  string_appendf (*m_buffer, "  <field name=\"%s\" ", f.name.c_str ());
	  if (f.start == -1)
	    string_appendf (*m_buffer, "type=\"%s\"/>\n",
			    f.type->name.c_str ());
	  else
	    string_appendf (*m_buffer, "start=\"%d\" end=\"%d\"/>\n", f.start,
			    f.end);
	}
      break;

    case TDESC_TYPE_ENUM:
      string_appendf (*m_buffer, ">\n");
      for (const tdesc_type_field &f : t->fields)
	string_appendf (*m_buffer, "  <field name=\"%s\" start=\"%d\"/>\n",
			f.name.c_str (), f.start);
      break;

    case TDESC_TYPE_UNION:
      string_appendf (*m_buffer, ">\n");
      for (const tdesc_type_field &f : t->fields)
	string_appendf (*m_buffer, "  <field name=\"%s\" type=\"%s\"/>\n",
			f.name.c_str (), f.type->name.c_str ());
      break;

    default:
      error (_("xml output is not supported for type \"%s\"."),
	     t->name.c_str ());
    }

  string_appendf (*m_buffer, "</%s>\n", types[t->kind - TDESC_TYPE_STRUCT]);
}

void print_xml_feature::visit (const tdesc_reg *r)
{
  string_appendf (*m_buffer,
		  "<reg name=\"%s\" bitsize=\"%d\" type=\"%s\" regnum=\"%ld\"",
		  r->name.c_str (), r->bitsize, r->type.c_str (),
		  r->target_regnum);

  if (r->group.length () > 0)
    string_appendf (*m_buffer, " group=\"%s\"", r->group.c_str ());

  if (r->save_restore == 0)
    string_appendf (*m_buffer, " save-restore=\"no\"");

  string_appendf (*m_buffer, "/>\n");
}

void print_xml_feature::visit_pre (const target_desc *e)
{
#ifndef IN_PROCESS_AGENT
  string_appendf (*m_buffer, "<?xml version=\"1.0\"?>\n");
  string_appendf (*m_buffer, "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">\n");
  string_appendf (*m_buffer, "<target>\n<architecture>%s</architecture>\n",
		  tdesc_architecture_name (e));

  const char *osabi = tdesc_osabi_name (e);
  if (osabi != nullptr)
    string_appendf (*m_buffer, "<osabi>%s</osabi>", osabi);
#endif
}

void print_xml_feature::visit_post (const target_desc *e)
{
  string_appendf (*m_buffer, "</target>\n");
}