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ead1e424 ILT |
1 | // defstd.cc -- define standard symbols for gold. |
2 | ||
6cb15b7f ILT |
3 | // Copyright 2006, 2007 Free Software Foundation, Inc. |
4 | // Written by Ian Lance Taylor <iant@google.com>. | |
5 | ||
6 | // This file is part of gold. | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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. | |
22 | ||
ead1e424 ILT |
23 | #include "gold.h" |
24 | ||
25 | #include "symtab.h" | |
26 | #include "defstd.h" | |
27 | ||
28 | // This is a simple file which defines the standard symbols like | |
29 | // "_end". | |
30 | ||
31 | namespace | |
32 | { | |
33 | ||
34 | using namespace gold; | |
35 | ||
36 | const Define_symbol_in_section in_section[] = | |
37 | { | |
38 | { | |
39 | "__preinit_array_start", // name | |
40 | ".preinit_array", // output_section | |
41 | 0, // value | |
42 | 0, // size | |
43 | elfcpp::STT_NOTYPE, // type | |
44 | elfcpp::STB_GLOBAL, // binding | |
45 | elfcpp::STV_HIDDEN, // visibility | |
46 | 0, // nonvis | |
47 | false, // offset_is_from_end | |
48 | true // only_if_ref | |
49 | }, | |
50 | { | |
51 | "__preinit_array_end", // name | |
52 | ".preinit_array", // output_section | |
53 | 0, // value | |
54 | 0, // size | |
55 | elfcpp::STT_NOTYPE, // type | |
56 | elfcpp::STB_GLOBAL, // binding | |
57 | elfcpp::STV_HIDDEN, // visibility | |
58 | 0, // nonvis | |
59 | true, // offset_is_from_end | |
60 | true // only_if_ref | |
61 | }, | |
62 | { | |
63 | "__init_array_start", // name | |
64 | ".init_array", // output_section | |
65 | 0, // value | |
66 | 0, // size | |
67 | elfcpp::STT_NOTYPE, // type | |
68 | elfcpp::STB_GLOBAL, // binding | |
69 | elfcpp::STV_HIDDEN, // visibility | |
70 | 0, // nonvis | |
71 | false, // offset_is_from_end | |
72 | true // only_if_ref | |
73 | }, | |
74 | { | |
75 | "__init_array_end", // name | |
76 | ".init_array", // output_section | |
77 | 0, // value | |
78 | 0, // size | |
79 | elfcpp::STT_NOTYPE, // type | |
80 | elfcpp::STB_GLOBAL, // binding | |
81 | elfcpp::STV_HIDDEN, // visibility | |
82 | 0, // nonvis | |
83 | true, // offset_is_from_end | |
84 | true // only_if_ref | |
85 | }, | |
86 | { | |
87 | "__fini_array_start", // name | |
88 | ".fini_array", // output_section | |
89 | 0, // value | |
90 | 0, // size | |
91 | elfcpp::STT_NOTYPE, // type | |
92 | elfcpp::STB_GLOBAL, // binding | |
93 | elfcpp::STV_HIDDEN, // visibility | |
94 | 0, // nonvis | |
95 | false, // offset_is_from_end | |
96 | true // only_if_ref | |
97 | }, | |
98 | { | |
99 | "__fini_array_end", // name | |
100 | ".fini_array", // output_section | |
101 | 0, // value | |
102 | 0, // size | |
103 | elfcpp::STT_NOTYPE, // type | |
104 | elfcpp::STB_GLOBAL, // binding | |
105 | elfcpp::STV_HIDDEN, // visibility | |
106 | 0, // nonvis | |
107 | true, // offset_is_from_end | |
108 | true // only_if_ref | |
109 | } | |
110 | }; | |
111 | ||
112 | const int in_section_count = sizeof in_section / sizeof in_section[0]; | |
113 | ||
114 | const Define_symbol_in_segment in_segment[] = | |
115 | { | |
f6ce93d6 ILT |
116 | { |
117 | "__executable_start", // name | |
118 | elfcpp::PT_LOAD, // segment_type | |
119 | elfcpp::PF(0), // segment_flags_set | |
120 | elfcpp::PF(0), // segment_flags_clear | |
121 | 0, // value | |
122 | 0, // size | |
123 | elfcpp::STT_NOTYPE, // type | |
124 | elfcpp::STB_GLOBAL, // binding | |
125 | elfcpp::STV_DEFAULT, // visibility | |
126 | 0, // nonvis | |
127 | Symbol::SEGMENT_START, // offset_from_base | |
128 | true // only_if_ref | |
129 | }, | |
130 | { | |
131 | "etext", // name | |
132 | elfcpp::PT_LOAD, // segment_type | |
133 | elfcpp::PF_X, // segment_flags_set | |
134 | elfcpp::PF_W, // segment_flags_clear | |
135 | 0, // value | |
136 | 0, // size | |
137 | elfcpp::STT_NOTYPE, // type | |
138 | elfcpp::STB_GLOBAL, // binding | |
139 | elfcpp::STV_DEFAULT, // visibility | |
140 | 0, // nonvis | |
141 | Symbol::SEGMENT_END, // offset_from_base | |
142 | true // only_if_ref | |
143 | }, | |
144 | { | |
145 | "_etext", // name | |
146 | elfcpp::PT_LOAD, // segment_type | |
147 | elfcpp::PF_X, // segment_flags_set | |
148 | elfcpp::PF_W, // segment_flags_clear | |
149 | 0, // value | |
150 | 0, // size | |
151 | elfcpp::STT_NOTYPE, // type | |
152 | elfcpp::STB_GLOBAL, // binding | |
153 | elfcpp::STV_DEFAULT, // visibility | |
154 | 0, // nonvis | |
155 | Symbol::SEGMENT_END, // offset_from_base | |
156 | true // only_if_ref | |
157 | }, | |
158 | { | |
159 | "__etext", // name | |
160 | elfcpp::PT_LOAD, // segment_type | |
161 | elfcpp::PF_X, // segment_flags_set | |
162 | elfcpp::PF_W, // segment_flags_clear | |
163 | 0, // value | |
164 | 0, // size | |
165 | elfcpp::STT_NOTYPE, // type | |
166 | elfcpp::STB_GLOBAL, // binding | |
167 | elfcpp::STV_DEFAULT, // visibility | |
168 | 0, // nonvis | |
169 | Symbol::SEGMENT_END, // offset_from_base | |
170 | true // only_if_ref | |
171 | }, | |
172 | { | |
173 | "_edata", // name | |
174 | elfcpp::PT_LOAD, // segment_type | |
04df9a57 | 175 | elfcpp::PF_W, // segment_flags_set |
f6ce93d6 ILT |
176 | elfcpp::PF(0), // segment_flags_clear |
177 | 0, // value | |
178 | 0, // size | |
179 | elfcpp::STT_NOTYPE, // type | |
180 | elfcpp::STB_GLOBAL, // binding | |
181 | elfcpp::STV_DEFAULT, // visibility | |
182 | 0, // nonvis | |
183 | Symbol::SEGMENT_BSS, // offset_from_base | |
184 | false // only_if_ref | |
185 | }, | |
186 | { | |
187 | "edata", // name | |
188 | elfcpp::PT_LOAD, // segment_type | |
04df9a57 | 189 | elfcpp::PF_W, // segment_flags_set |
f6ce93d6 ILT |
190 | elfcpp::PF(0), // segment_flags_clear |
191 | 0, // value | |
192 | 0, // size | |
193 | elfcpp::STT_NOTYPE, // type | |
194 | elfcpp::STB_GLOBAL, // binding | |
195 | elfcpp::STV_DEFAULT, // visibility | |
196 | 0, // nonvis | |
197 | Symbol::SEGMENT_BSS, // offset_from_base | |
198 | true // only_if_ref | |
199 | }, | |
200 | { | |
201 | "__bss_start", // name | |
202 | elfcpp::PT_LOAD, // segment_type | |
04df9a57 | 203 | elfcpp::PF_W, // segment_flags_set |
f6ce93d6 ILT |
204 | elfcpp::PF(0), // segment_flags_clear |
205 | 0, // value | |
206 | 0, // size | |
207 | elfcpp::STT_NOTYPE, // type | |
208 | elfcpp::STB_GLOBAL, // binding | |
209 | elfcpp::STV_DEFAULT, // visibility | |
210 | 0, // nonvis | |
211 | Symbol::SEGMENT_BSS, // offset_from_base | |
212 | false // only_if_ref | |
213 | }, | |
ead1e424 ILT |
214 | { |
215 | "_end", // name | |
216 | elfcpp::PT_LOAD, // segment_type | |
04df9a57 | 217 | elfcpp::PF_W, // segment_flags_set |
f6ce93d6 ILT |
218 | elfcpp::PF(0), // segment_flags_clear |
219 | 0, // value | |
220 | 0, // size | |
221 | elfcpp::STT_NOTYPE, // type | |
222 | elfcpp::STB_GLOBAL, // binding | |
223 | elfcpp::STV_DEFAULT, // visibility | |
224 | 0, // nonvis | |
04df9a57 | 225 | Symbol::SEGMENT_END, // offset_from_base |
f6ce93d6 ILT |
226 | false // only_if_ref |
227 | }, | |
228 | { | |
229 | "end", // name | |
230 | elfcpp::PT_LOAD, // segment_type | |
04df9a57 | 231 | elfcpp::PF_W, // segment_flags_set |
ead1e424 ILT |
232 | elfcpp::PF(0), // segment_flags_clear |
233 | 0, // value | |
234 | 0, // size | |
235 | elfcpp::STT_NOTYPE, // type | |
236 | elfcpp::STB_GLOBAL, // binding | |
237 | elfcpp::STV_DEFAULT, // visibility | |
238 | 0, // nonvis | |
04df9a57 | 239 | Symbol::SEGMENT_END, // offset_from_base |
ead1e424 ILT |
240 | false // only_if_ref |
241 | } | |
242 | }; | |
243 | ||
244 | const int in_segment_count = sizeof in_segment / sizeof in_segment[0]; | |
245 | ||
246 | } // End anonymous namespace. | |
247 | ||
248 | namespace gold | |
249 | { | |
250 | ||
251 | void | |
252 | define_standard_symbols(Symbol_table* symtab, const Layout* layout, | |
253 | Target* target) | |
254 | { | |
255 | symtab->define_symbols(layout, target, in_section_count, in_section); | |
256 | symtab->define_symbols(layout, target, in_segment_count, in_segment); | |
257 | } | |
258 | ||
259 | } // End namespace gold. |