aboutsummaryrefslogtreecommitdiff
path: root/gdbserver/tdesc.cc
blob: aff6f53029a3686be43d9b19565cc996f550a65b (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
/* Copyright (C) 2012-2024 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 "server.h"
#include "tdesc.h"
#include "regdef.h"

#ifndef IN_PROCESS_AGENT

target_desc::~target_desc ()
{
  xfree ((char *) arch);
  xfree ((char *) osabi);
}

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

  /* Compare the two vectors of expedited registers.  They will only match
     if the following conditions are met:

     - Both vectors have the same number of elements.
     - Both vectors contain the same elements.
     - The elements of both vectors appear in the same order.  */
  if (expedite_regs != other.expedite_regs)
    return false;

  return true;
}

#endif

void target_desc::accept (tdesc_element_visitor &v) const
{
#ifndef IN_PROCESS_AGENT
  v.visit_pre (this);

  for (const tdesc_feature_up &feature : features)
    feature->accept (v);

  v.visit_post (this);
#endif
}

void
init_target_desc (struct target_desc *tdesc,
		  const char **expedite_regs)
{
  int offset = 0;

  /* Go through all the features and populate reg_defs.  */
  for (const tdesc_feature_up &feature : tdesc->features)
    for (const tdesc_reg_up &treg : feature->registers)
      {
	int regnum = treg->target_regnum;

	/* Register number will increase (possibly with gaps) or be zero.  */
	gdb_assert (regnum == 0 || regnum >= tdesc->reg_defs.size ());

	if (regnum != 0)
	  tdesc->reg_defs.resize (regnum, gdb::reg (offset));

	tdesc->reg_defs.emplace_back (treg->name.c_str (), offset,
				      treg->bitsize);
	offset += treg->bitsize;
      }

  tdesc->registers_size = offset / 8;

  /* Make sure PBUFSIZ is large enough to hold a full register
     packet.  */
  gdb_assert (2 * tdesc->registers_size + 32 <= PBUFSIZ);

#ifndef IN_PROCESS_AGENT
  /* Drop the contents of the previous vector, if any.  */
  tdesc->expedite_regs.clear ();

  /* Initialize the vector with new expedite registers contents.  */
  int expedite_count = 0;
  while (expedite_regs[expedite_count] != nullptr)
    tdesc->expedite_regs.push_back (expedite_regs[expedite_count++]);
#endif
}

/* See gdbsupport/tdesc.h.  */

target_desc_up
allocate_target_description (void)
{
  return target_desc_up (new target_desc ());
}

/* See gdbsupport/tdesc.h.  */

void
target_desc_deleter::operator() (struct target_desc *target_desc) const
{
  delete target_desc;
}

#ifndef IN_PROCESS_AGENT

static const struct target_desc default_description {};

void
copy_target_description (struct target_desc *dest,
			 const struct target_desc *src)
{
  dest->reg_defs = src->reg_defs;
  dest->expedite_regs = src->expedite_regs;
  dest->registers_size = src->registers_size;
  dest->xmltarget = src->xmltarget;
}

const struct target_desc *
current_target_desc (void)
{
  if (current_thread == NULL)
    return &default_description;

  return current_process ()->tdesc;
}

/* An empty structure.  */

struct tdesc_compatible_info { };

/* See gdbsupport/tdesc.h.  */

const std::vector<tdesc_compatible_info_up> &
tdesc_compatible_info_list (const target_desc *target_desc)
{
  static std::vector<tdesc_compatible_info_up> empty;
  return empty;
}

/* See gdbsupport/tdesc.h.  */

const char *
tdesc_compatible_info_arch_name (const tdesc_compatible_info_up &c_info)
{
  return nullptr;
}

/* See gdbsupport/tdesc.h.  */

const char *
tdesc_architecture_name (const struct target_desc *target_desc)
{
  return target_desc->arch;
}

/* See gdbsupport/tdesc.h.  */

void
set_tdesc_architecture (struct target_desc *target_desc,
			const char *name)
{
  target_desc->arch = xstrdup (name);
}

/* See gdbsupport/tdesc.h.  */

const char *
tdesc_osabi_name (const struct target_desc *target_desc)
{
  return target_desc->osabi;
}

/* See gdbsupport/tdesc.h.  */

void
set_tdesc_osabi (struct target_desc *target_desc, const char *name)
{
  target_desc->osabi = xstrdup (name);
}

/* See gdbsupport/tdesc.h.  */

const char *
tdesc_get_features_xml (const target_desc *tdesc)
{
  /* Either .xmltarget or .features is not NULL.  */
  gdb_assert (tdesc->xmltarget != NULL
	      || (!tdesc->features.empty ()
		  && tdesc->arch != NULL));

  if (tdesc->xmltarget == NULL)
    {
      std::string buffer ("@");
      print_xml_feature v (&buffer);
      tdesc->accept (v);
      tdesc->xmltarget = xstrdup (buffer.c_str ());
    }

  return tdesc->xmltarget;
}
#endif

/* See gdbsupport/tdesc.h.  */

struct tdesc_feature *
tdesc_create_feature (struct target_desc *tdesc, const char *name)
{
  struct tdesc_feature *new_feature = new tdesc_feature (name);
  tdesc->features.emplace_back (new_feature);
  return new_feature;
}

/* See gdbsupport/tdesc.h.  */

bool
tdesc_contains_feature (const target_desc *tdesc, const std::string &feature)
{
  gdb_assert (tdesc != nullptr);

  for (const tdesc_feature_up &f : tdesc->features)
    {
      if (f->name == feature)
	return true;
    }

  return false;
}