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
|
// parameters.cc -- general parameters for a link using gold
// Copyright 2006, 2007, 2008, 2009, 2010 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.
#include "gold.h"
#include "debug.h"
#include "options.h"
#include "target.h"
#include "target-select.h"
namespace gold
{
// Our local version of the variable, which is not const.
static Parameters static_parameters;
// The global variable.
const Parameters* parameters = &static_parameters;
// A helper class to set the target once.
class Set_parameters_target_once : public Once
{
public:
Set_parameters_target_once(Parameters* parameters)
: parameters_(parameters)
{ }
protected:
void
do_run_once(void* arg)
{ this->parameters_->set_target_once(static_cast<Target*>(arg)); }
private:
Parameters* parameters_;
};
// We only need one Set_parameters_target_once.
static
Set_parameters_target_once set_parameters_target_once(&static_parameters);
// Class Parameters.
Parameters::Parameters()
: errors_(NULL), options_(NULL), target_(NULL),
doing_static_link_valid_(false), doing_static_link_(false),
debug_(0),
set_parameters_target_once_(&set_parameters_target_once)
{
}
void
Parameters::set_errors(Errors* errors)
{
gold_assert(this->errors_ == NULL);
this->errors_ = errors;
}
void
Parameters::set_options(const General_options* options)
{
gold_assert(!this->options_valid());
this->options_ = options;
// For speed, we convert the options() debug var from a string to an
// enum (from debug.h).
this->debug_ = debug_string_to_enum(this->options().debug());
// If --verbose is set, it acts as "--debug=files".
if (options->verbose())
this->debug_ |= DEBUG_FILES;
}
void
Parameters::set_doing_static_link(bool doing_static_link)
{
gold_assert(!this->doing_static_link_valid_);
this->doing_static_link_ = doing_static_link;
this->doing_static_link_valid_ = true;
}
void
Parameters::set_target(Target* target)
{
this->set_parameters_target_once_->run_once(static_cast<void*>(target));
gold_assert(target == this->target_);
}
// This is called at most once.
void
Parameters::set_target_once(Target* target)
{
gold_assert(this->target_ == NULL);
this->target_ = target;
}
// Clear the target, for testing.
void
Parameters::clear_target()
{
this->target_ = NULL;
// We need a new Set_parameters_target_once so that we can set the
// target again.
this->set_parameters_target_once_ = new Set_parameters_target_once(this);
}
// Return whether TARGET is compatible with the target we are using.
bool
Parameters::is_compatible_target(const Target* target) const
{
if (this->target_ == NULL)
return true;
return target == this->target_;
}
Parameters::Target_size_endianness
Parameters::size_and_endianness() const
{
if (this->target().get_size() == 32)
{
if (!this->target().is_big_endian())
{
#ifdef HAVE_TARGET_32_LITTLE
return TARGET_32_LITTLE;
#else
gold_unreachable();
#endif
}
else
{
#ifdef HAVE_TARGET_32_BIG
return TARGET_32_BIG;
#else
gold_unreachable();
#endif
}
}
else if (parameters->target().get_size() == 64)
{
if (!parameters->target().is_big_endian())
{
#ifdef HAVE_TARGET_64_LITTLE
return TARGET_64_LITTLE;
#else
gold_unreachable();
#endif
}
else
{
#ifdef HAVE_TARGET_64_BIG
return TARGET_64_BIG;
#else
gold_unreachable();
#endif
}
}
else
gold_unreachable();
}
void
set_parameters_errors(Errors* errors)
{ static_parameters.set_errors(errors); }
void
set_parameters_options(const General_options* options)
{ static_parameters.set_options(options); }
void
set_parameters_target(Target* target)
{
static_parameters.set_target(target);
target->select_as_default_target();
}
void
set_parameters_doing_static_link(bool doing_static_link)
{ static_parameters.set_doing_static_link(doing_static_link); }
// Force the target to be valid by using the default. Use the
// --oformat option is set; this supports the x86_64 kernel build,
// which converts a binary file to an object file using -r --format
// binary --oformat elf32-i386 foo.o. Otherwise use the configured
// default.
void
parameters_force_valid_target()
{
if (parameters->target_valid())
return;
gold_assert(parameters->options_valid());
if (parameters->options().user_set_oformat())
{
Target* target = select_target_by_name(parameters->options().oformat());
if (target != NULL)
{
set_parameters_target(target);
return;
}
gold_error(_("unrecognized output format %s"),
parameters->options().oformat());
}
// The GOLD_DEFAULT_xx macros are defined by the configure script.
Target* target = select_target(elfcpp::GOLD_DEFAULT_MACHINE,
GOLD_DEFAULT_SIZE,
GOLD_DEFAULT_BIG_ENDIAN,
elfcpp::GOLD_DEFAULT_OSABI,
0);
gold_assert(target != NULL);
set_parameters_target(target);
}
// Clear the current target, for testing.
void
parameters_clear_target()
{
static_parameters.clear_target();
}
} // End namespace gold.
|
