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
|
// parameters.h -- general parameters for a link using gold -*- C++ -*-
// 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.
#ifndef GOLD_PARAMETERS_H
#define GOLD_PARAMETERS_H
namespace gold
{
class General_options;
class Errors;
class Target;
template<int size, bool big_endian>
class Sized_target;
class Set_parameters_target_once;
// 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. The parameters class holds three types of data:
// 1) An Errors struct. Any part of the code that wants to log an
// error can use parameters->errors().
// 2) A const General_options. These are the options as read on
// the commandline.
// 3) Target information, such as size and endian-ness. This is
// available as soon as we've decided on the Target (after
// parsing the first .o file).
// 4) Whether we're doing a static link or not. This is set
// after all inputs have been read and we know if any is a
// dynamic library.
class Parameters
{
public:
Parameters();
// These should be called as soon as they are known.
void
set_errors(Errors* errors);
void
set_options(const General_options* options);
void
set_target(Target* target);
void
set_doing_static_link(bool doing_static_link);
// Return the error object.
Errors*
errors() const
{ return this->errors_; }
// Whether the options are valid. This should not normally be
// called, but it is needed by gold_exit.
bool
options_valid() const
{ return this->options_ != NULL; }
// Return the options object.
const General_options&
options() const
{
gold_assert(this->options_valid());
return *this->options_;
}
// Return whether the target field has been set.
bool
target_valid() const
{ return this->target_ != NULL; }
// The target of the output file we are generating.
const Target&
target() const
{
gold_assert(this->target_valid());
return *this->target_;
}
// The Sized_target of the output file. The caller must request the
// right size and endianness.
template<int size, bool big_endian>
Sized_target<size, big_endian>*
sized_target() const
{
gold_assert(this->target_valid());
return static_cast<Sized_target<size, big_endian>*>(this->target_);
}
// Clear the target, for testing.
void
clear_target();
// Return true if TARGET is compatible with the current target.
bool
is_compatible_target(const Target*) const;
bool
doing_static_link() const
{
gold_assert(this->doing_static_link_valid_);
return this->doing_static_link_;
}
// This is just a copy of options().debug(). We make a copy so we
// don't have to #include options.h in order to inline
// is_debugging_enabled, below.
int
debug() const
{
// This can be called before the options are set up.
if (!this->options_valid())
return 0;
return debug_;
}
// A convenience routine for combining size and endianness. It also
// checks the HAVE_TARGET_FOO configure options and dies if the
// current target's size/endianness is not supported according to
// HAVE_TARGET_FOO. Otherwise it returns this enum
enum Target_size_endianness
{ TARGET_32_LITTLE, TARGET_32_BIG, TARGET_64_LITTLE, TARGET_64_BIG };
Target_size_endianness
size_and_endianness() const;
private:
void
set_target_once(Target*);
void
check_target_endianness();
friend class Set_parameters_target_once;
Errors* errors_;
const General_options* options_;
Target* target_;
bool doing_static_link_valid_;
bool doing_static_link_;
int debug_;
Set_parameters_target_once* set_parameters_target_once_;
};
// This is a global variable.
extern const Parameters* parameters;
// We use free functions for these since they affect a global variable
// that is internal to parameters.cc.
extern void
set_parameters_errors(Errors* errors);
extern void
set_parameters_options(const General_options* options);
extern void
set_parameters_target(Target* target);
extern void
set_parameters_doing_static_link(bool doing_static_link);
// Ensure that the target to be valid by using the default target if
// necessary.
extern void
parameters_force_valid_target();
// Clear the current target, for testing.
extern void
parameters_clear_target();
// Return whether we are doing a particular debugging type. The
// argument is one of the flags from debug.h.
inline bool
is_debugging_enabled(unsigned int type)
{ return (parameters->debug() & type) != 0; }
} // End namespace gold.
#endif // !defined(GOLD_PARAMETERS_H)
|
