aboutsummaryrefslogtreecommitdiff
path: root/gold/parameters.h
blob: 3186b6d454d3e848beb28a2fa4536456110c1941 (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
// parameters.h -- general parameters for a link using gold  -*- C++ -*-

// Copyright 2006, 2007 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.

// This file is part of gold.

// 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.

#ifndef GOLD_PARAMETERS_H
#define GOLD_PARAMETERS_H

namespace gold
{

class General_options;
class Errors;

// Here we define the Parameters class which simply holds simple
// general parameters which apply to the entire link.  We use a global
// variable for this.  This is in contrast to the General_options
// class, which holds the complete state of position independent
// command line options.  The hope is that Parameters will stay fairly
// simple, so that if this turns into a library it will be clear how
// these parameters should be set.

class Parameters
{
 public:
  Parameters(Errors*);

  // Return the error object.
  Errors*
  errors() const
  { return this->errors_; }

  // Return the output file name.
  const char*
  output_file_name() const
  {
    gold_assert(this->options_valid_);
    return this->output_file_name_;
  }

  // Whether we are generating a regular executable.
  bool
  output_is_executable() const
  {
    gold_assert(this->output_file_type_ != OUTPUT_INVALID);
    return this->output_file_type_ == OUTPUT_EXECUTABLE;
  }

  // Whether we are generating a shared library.
  bool
  output_is_shared() const
  {
    gold_assert(this->output_file_type_ != OUTPUT_INVALID);
    return this->output_file_type_ == OUTPUT_SHARED;
  }

  // Whether we are generating an object file.
  bool
  output_is_object() const
  {
    gold_assert(this->output_file_type_ != OUTPUT_INVALID);
    return this->output_file_type_ == OUTPUT_OBJECT;
  }

  // Whether we are generating position-independent output.
  // This is the case when generating either a shared library
  // or a regular executable with the --pic-executable option.
  // FIXME: support --pic-executable
  bool
  output_is_position_independent() const
  { return output_is_shared(); }

  // The target system root directory.  This is NULL if there isn't
  // one.
  const std::string&
  sysroot() const
  {
    gold_assert(this->options_valid_);
    return this->sysroot_;
  }

  // Whether to strip all symbols.
  bool
  strip_all() const
  {
    gold_assert(this->strip_ != STRIP_INVALID);
    return this->strip_ == STRIP_ALL;
  }

  // Whether to strip debugging information.
  bool
  strip_debug() const
  {
    gold_assert(this->strip_ != STRIP_INVALID);
    return this->strip_ == STRIP_ALL || this->strip_ == STRIP_DEBUG;
  }

  // Whether to strip debugging information that's not used by gdb.
  bool
  strip_debug_gdb() const
  {
    gold_assert(this->strip_ != STRIP_INVALID);
    return this->strip_debug() || this->strip_ == STRIP_DEBUG_UNUSED_BY_GDB;
  }

  // Whether to permit unresolved references from shared libraries.
  bool
  allow_shlib_undefined() const
  {
    gold_assert(this->options_valid_);
    return this->allow_shlib_undefined_;
  }

  // Whether we are doing a symbolic link, in which all defined
  // symbols are bound locally.
  bool
  symbolic() const
  {
    gold_assert(this->options_valid_);
    return this->symbolic_;
  }

  // Whether we should demangle C++ symbols in our log messages.
  bool
  demangle() const
  { return this->demangle_; }

  // Whether we should try to detect violations of the One Definition Rule.
  bool
  detect_odr_violations() const
  {
    gold_assert(this->options_valid_);
    return this->detect_odr_violations_;
  }

  // The general linker optimization level.
  int
  optimization_level() const
  {
    gold_assert(this->options_valid_);
    return this->optimization_level_;
  }

  // Whether the -E/--export-dynamic flag is set.
  bool
  export_dynamic() const
  {
    gold_assert(this->options_valid_);
    return this->export_dynamic_;
  }

  // Whether we are doing a static link--a link in which none of the
  // input files are shared libraries.  This is only known after we
  // have seen all the input files.
  bool
  doing_static_link() const
  {
    gold_assert(this->is_doing_static_link_valid_);
    return this->doing_static_link_;
  }

  // The size of the output file we are generating.  This should
  // return 32 or 64.
  int
  get_size() const
  {
    gold_assert(this->is_size_and_endian_valid_);
    return this->size_;
  }

  // Whether the output is big endian.
  bool
  is_big_endian() const
  {
    gold_assert(this->is_size_and_endian_valid_);
    return this->is_big_endian_;
  }

  // Set values recorded from options.
  void
  set_from_options(const General_options*);

  // Set whether we are doing a static link.
  void
  set_doing_static_link(bool doing_static_link);

  // Set the size and endianness.
  void
  set_size_and_endianness(int size, bool is_big_endian);

 private:
  // The types of output files.
  enum Output_file_type
    {
      // Uninitialized.
      OUTPUT_INVALID,
      // Generating executable.
      OUTPUT_EXECUTABLE,
      // Generating shared library.
      OUTPUT_SHARED,
      // Generating object file.
      OUTPUT_OBJECT
    };

  // Which symbols to strip.
  enum Strip
  {
    // Uninitialize.
    STRIP_INVALID,
    // Don't strip any symbols.
    STRIP_NONE,
    // Strip all symbols.
    STRIP_ALL,
    // Strip debugging information.
    STRIP_DEBUG,
    // Strip debugging information that's not used by gdb (at least <= 6.7)
    STRIP_DEBUG_UNUSED_BY_GDB
  };

  // A pointer to the error handling object.
  Errors* errors_;

  // Whether the fields set from the options are valid.
  bool options_valid_;
  // The output file name.
  const char* output_file_name_;
  // The type of the output file.
  Output_file_type output_file_type_;
  // The target system root directory.
  std::string sysroot_;
  // Which symbols to strip.
  Strip strip_;
  // Whether to allow undefined references from shared libraries.
  bool allow_shlib_undefined_;
  // Whether we are doing a symbolic link.
  bool symbolic_;
  // Whether we should demangle C++ symbols in our log messages.
  bool demangle_;
  // Whether we try to detect One Definition Rule violations.
  bool detect_odr_violations_;
  // The optimization level.
  int optimization_level_;
  // Whether the -E/--export-dynamic flag is set.
  bool export_dynamic_;

  // Whether the doing_static_link_ field is valid.
  bool is_doing_static_link_valid_;
  // Whether we are doing a static link.
  bool doing_static_link_;
  // Whether the size_ and is_big_endian_ fields are valid.
  bool is_size_and_endian_valid_;
  // The size of the output file--32 or 64.
  int size_;
  // Whether the output file is big endian.
  bool is_big_endian_;
};

// This is a global variable.
extern const Parameters* parameters;

// Initialize the global variable.
extern void initialize_parameters(Errors*);

// Set the options.
extern void set_parameters_from_options(const General_options*);

// Set the size and endianness of the global parameters variable.
extern void set_parameters_size_and_endianness(int size, bool is_big_endian);

// Set whether we are doing a static link.
extern void set_parameters_doing_static_link(bool doing_static_link);

} // End namespace gold.

#endif // !defined(GOLD_PARAMETERS_H)