1 // readsyms.h -- read input file symbols for gold -*- C++ -*-
3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
23 #ifndef GOLD_READSYMS_H
24 #define GOLD_READSYMS_H
28 #include "workqueue.h"
39 // This Task is responsible for reading the symbols from an input
40 // file. This also includes reading the relocations so that we can
41 // check for any that require a PLT and/or a GOT. After the data has
42 // been read, this queues up another task to actually add the symbols
43 // to the symbol table. The tasks are separated because the file
44 // reading can occur in parallel but adding the symbols must be done
45 // in the order of the input files.
47 class Read_symbols : public Task
50 // DIRPATH is the list of directories to search for libraries.
51 // INPUT is the file to read. INPUT_GROUP is not NULL if we are in
52 // the middle of an input group. THIS_BLOCKER is used to prevent
53 // the associated Add_symbols task from running before the previous
54 // one has completed; it will be NULL for the first task.
55 // NEXT_BLOCKER is used to block the next input file from adding
57 Read_symbols(Input_objects* input_objects, Symbol_table* symtab,
58 Layout* layout, Dirsearch* dirpath, Mapfile* mapfile,
59 const Input_argument* input_argument,
60 Input_group* input_group, Task_token* this_blocker,
61 Task_token* next_blocker)
62 : input_objects_(input_objects), symtab_(symtab), layout_(layout),
63 dirpath_(dirpath), mapfile_(mapfile), input_argument_(input_argument),
64 input_group_(input_group), this_blocker_(this_blocker),
65 next_blocker_(next_blocker)
70 // The standard Task methods.
85 // Handle an archive group.
89 // Open and identify the file.
91 do_read_symbols(Workqueue*);
93 Input_objects* input_objects_;
94 Symbol_table* symtab_;
98 const Input_argument* input_argument_;
99 Input_group* input_group_;
100 Task_token* this_blocker_;
101 Task_token* next_blocker_;
104 // This Task handles adding the symbols to the symbol table. These
105 // tasks must be run in the same order as the arguments appear on the
108 class Add_symbols : public Task
111 // THIS_BLOCKER is used to prevent this task from running before the
112 // one for the previous input file. NEXT_BLOCKER is used to prevent
113 // the next task from running.
114 Add_symbols(Input_objects* input_objects, Symbol_table* symtab,
115 Layout* layout, Object* object,
116 Read_symbols_data* sd, Task_token* this_blocker,
117 Task_token* next_blocker)
118 : input_objects_(input_objects), symtab_(symtab), layout_(layout),
119 object_(object), sd_(sd), this_blocker_(this_blocker),
120 next_blocker_(next_blocker)
125 // The standard Task methods.
138 { return "Add_symbols " + this->object_->name(); }
141 Input_objects* input_objects_;
142 Symbol_table* symtab_;
145 Read_symbols_data* sd_;
146 Task_token* this_blocker_;
147 Task_token* next_blocker_;
150 // This class is used to track the archives in a group.
155 typedef std::vector<Archive*> Archives;
156 typedef Archives::const_iterator const_iterator;
162 // Add an archive to the group.
164 add_archive(Archive* arch)
165 { this->archives_.push_back(arch); }
167 // Loop over the archives in the group.
171 { return this->archives_.begin(); }
175 { return this->archives_.end(); }
181 // This class is used to finish up handling a group. It is just a
184 class Finish_group : public Task
187 Finish_group(Input_objects* input_objects, Symbol_table* symtab,
188 Layout* layout, Mapfile* mapfile, Input_group* input_group,
189 int saw_undefined, Task_token* this_blocker,
190 Task_token* next_blocker)
191 : input_objects_(input_objects), symtab_(symtab),
192 layout_(layout), mapfile_(mapfile), input_group_(input_group),
193 saw_undefined_(saw_undefined), this_blocker_(this_blocker),
194 next_blocker_(next_blocker)
199 // The standard Task methods.
212 { return "Finish_group"; }
215 Input_objects* input_objects_;
216 Symbol_table* symtab_;
219 Input_group* input_group_;
221 Task_token* this_blocker_;
222 Task_token* next_blocker_;
225 // This class is used to read a file which was not recognized as an
226 // object or archive. It tries to read it as a linker script, using
227 // the tokens to serialize with the calls to Add_symbols.
229 class Read_script : public Task
232 Read_script(Symbol_table* symtab, Layout* layout, Dirsearch* dirpath,
233 Input_objects* input_objects, Mapfile* mapfile,
234 Input_group* input_group, const Input_argument* input_argument,
235 Input_file* input_file, Task_token* this_blocker,
236 Task_token* next_blocker)
237 : symtab_(symtab), layout_(layout), dirpath_(dirpath),
238 input_objects_(input_objects), mapfile_(mapfile),
239 input_group_(input_group), input_argument_(input_argument),
240 input_file_(input_file), this_blocker_(this_blocker),
241 next_blocker_(next_blocker)
246 // The standard Task methods.
261 Symbol_table* symtab_;
264 Input_objects* input_objects_;
266 Input_group* input_group_;
267 const Input_argument* input_argument_;
268 Input_file* input_file_;
269 Task_token* this_blocker_;
270 Task_token* next_blocker_;
273 } // end namespace gold
275 #endif // !defined(GOLD_READSYMS_H)