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1 | // defstd.cc -- define standard symbols for gold. | |
2 | ||
3 | #include "gold.h" | |
4 | ||
5 | #include "symtab.h" | |
6 | #include "defstd.h" | |
7 | ||
8 | // This is a simple file which defines the standard symbols like | |
9 | // "_end". | |
10 | ||
11 | namespace | |
12 | { | |
13 | ||
14 | using namespace gold; | |
15 | ||
16 | const Define_symbol_in_section in_section[] = | |
17 | { | |
18 | { | |
19 | "__preinit_array_start", // name | |
20 | ".preinit_array", // output_section | |
21 | 0, // value | |
22 | 0, // size | |
23 | elfcpp::STT_NOTYPE, // type | |
24 | elfcpp::STB_GLOBAL, // binding | |
25 | elfcpp::STV_HIDDEN, // visibility | |
26 | 0, // nonvis | |
27 | false, // offset_is_from_end | |
28 | true // only_if_ref | |
29 | }, | |
30 | { | |
31 | "__preinit_array_end", // name | |
32 | ".preinit_array", // output_section | |
33 | 0, // value | |
34 | 0, // size | |
35 | elfcpp::STT_NOTYPE, // type | |
36 | elfcpp::STB_GLOBAL, // binding | |
37 | elfcpp::STV_HIDDEN, // visibility | |
38 | 0, // nonvis | |
39 | true, // offset_is_from_end | |
40 | true // only_if_ref | |
41 | }, | |
42 | { | |
43 | "__init_array_start", // name | |
44 | ".init_array", // output_section | |
45 | 0, // value | |
46 | 0, // size | |
47 | elfcpp::STT_NOTYPE, // type | |
48 | elfcpp::STB_GLOBAL, // binding | |
49 | elfcpp::STV_HIDDEN, // visibility | |
50 | 0, // nonvis | |
51 | false, // offset_is_from_end | |
52 | true // only_if_ref | |
53 | }, | |
54 | { | |
55 | "__init_array_end", // name | |
56 | ".init_array", // output_section | |
57 | 0, // value | |
58 | 0, // size | |
59 | elfcpp::STT_NOTYPE, // type | |
60 | elfcpp::STB_GLOBAL, // binding | |
61 | elfcpp::STV_HIDDEN, // visibility | |
62 | 0, // nonvis | |
63 | true, // offset_is_from_end | |
64 | true // only_if_ref | |
65 | }, | |
66 | { | |
67 | "__fini_array_start", // name | |
68 | ".fini_array", // output_section | |
69 | 0, // value | |
70 | 0, // size | |
71 | elfcpp::STT_NOTYPE, // type | |
72 | elfcpp::STB_GLOBAL, // binding | |
73 | elfcpp::STV_HIDDEN, // visibility | |
74 | 0, // nonvis | |
75 | false, // offset_is_from_end | |
76 | true // only_if_ref | |
77 | }, | |
78 | { | |
79 | "__fini_array_end", // name | |
80 | ".fini_array", // output_section | |
81 | 0, // value | |
82 | 0, // size | |
83 | elfcpp::STT_NOTYPE, // type | |
84 | elfcpp::STB_GLOBAL, // binding | |
85 | elfcpp::STV_HIDDEN, // visibility | |
86 | 0, // nonvis | |
87 | true, // offset_is_from_end | |
88 | true // only_if_ref | |
89 | } | |
90 | }; | |
91 | ||
92 | const int in_section_count = sizeof in_section / sizeof in_section[0]; | |
93 | ||
94 | const Define_symbol_in_segment in_segment[] = | |
95 | { | |
96 | { | |
97 | "__executable_start", // name | |
98 | elfcpp::PT_LOAD, // segment_type | |
99 | elfcpp::PF(0), // segment_flags_set | |
100 | elfcpp::PF(0), // segment_flags_clear | |
101 | 0, // value | |
102 | 0, // size | |
103 | elfcpp::STT_NOTYPE, // type | |
104 | elfcpp::STB_GLOBAL, // binding | |
105 | elfcpp::STV_DEFAULT, // visibility | |
106 | 0, // nonvis | |
107 | Symbol::SEGMENT_START, // offset_from_base | |
108 | true // only_if_ref | |
109 | }, | |
110 | { | |
111 | "etext", // name | |
112 | elfcpp::PT_LOAD, // segment_type | |
113 | elfcpp::PF_X, // segment_flags_set | |
114 | elfcpp::PF_W, // segment_flags_clear | |
115 | 0, // value | |
116 | 0, // size | |
117 | elfcpp::STT_NOTYPE, // type | |
118 | elfcpp::STB_GLOBAL, // binding | |
119 | elfcpp::STV_DEFAULT, // visibility | |
120 | 0, // nonvis | |
121 | Symbol::SEGMENT_END, // offset_from_base | |
122 | true // only_if_ref | |
123 | }, | |
124 | { | |
125 | "_etext", // name | |
126 | elfcpp::PT_LOAD, // segment_type | |
127 | elfcpp::PF_X, // segment_flags_set | |
128 | elfcpp::PF_W, // segment_flags_clear | |
129 | 0, // value | |
130 | 0, // size | |
131 | elfcpp::STT_NOTYPE, // type | |
132 | elfcpp::STB_GLOBAL, // binding | |
133 | elfcpp::STV_DEFAULT, // visibility | |
134 | 0, // nonvis | |
135 | Symbol::SEGMENT_END, // offset_from_base | |
136 | true // only_if_ref | |
137 | }, | |
138 | { | |
139 | "__etext", // name | |
140 | elfcpp::PT_LOAD, // segment_type | |
141 | elfcpp::PF_X, // segment_flags_set | |
142 | elfcpp::PF_W, // segment_flags_clear | |
143 | 0, // value | |
144 | 0, // size | |
145 | elfcpp::STT_NOTYPE, // type | |
146 | elfcpp::STB_GLOBAL, // binding | |
147 | elfcpp::STV_DEFAULT, // visibility | |
148 | 0, // nonvis | |
149 | Symbol::SEGMENT_END, // offset_from_base | |
150 | true // only_if_ref | |
151 | }, | |
152 | { | |
153 | "_edata", // name | |
154 | elfcpp::PT_LOAD, // segment_type | |
155 | elfcpp::PF_X, // segment_flags_set | |
156 | elfcpp::PF(0), // segment_flags_clear | |
157 | 0, // value | |
158 | 0, // size | |
159 | elfcpp::STT_NOTYPE, // type | |
160 | elfcpp::STB_GLOBAL, // binding | |
161 | elfcpp::STV_DEFAULT, // visibility | |
162 | 0, // nonvis | |
163 | Symbol::SEGMENT_BSS, // offset_from_base | |
164 | false // only_if_ref | |
165 | }, | |
166 | { | |
167 | "edata", // name | |
168 | elfcpp::PT_LOAD, // segment_type | |
169 | elfcpp::PF_X, // segment_flags_set | |
170 | elfcpp::PF(0), // segment_flags_clear | |
171 | 0, // value | |
172 | 0, // size | |
173 | elfcpp::STT_NOTYPE, // type | |
174 | elfcpp::STB_GLOBAL, // binding | |
175 | elfcpp::STV_DEFAULT, // visibility | |
176 | 0, // nonvis | |
177 | Symbol::SEGMENT_BSS, // offset_from_base | |
178 | true // only_if_ref | |
179 | }, | |
180 | { | |
181 | "__bss_start", // name | |
182 | elfcpp::PT_LOAD, // segment_type | |
183 | elfcpp::PF_X, // segment_flags_set | |
184 | elfcpp::PF(0), // segment_flags_clear | |
185 | 0, // value | |
186 | 0, // size | |
187 | elfcpp::STT_NOTYPE, // type | |
188 | elfcpp::STB_GLOBAL, // binding | |
189 | elfcpp::STV_DEFAULT, // visibility | |
190 | 0, // nonvis | |
191 | Symbol::SEGMENT_BSS, // offset_from_base | |
192 | false // only_if_ref | |
193 | }, | |
194 | { | |
195 | "_end", // name | |
196 | elfcpp::PT_LOAD, // segment_type | |
197 | elfcpp::PF_X, // segment_flags_set | |
198 | elfcpp::PF(0), // segment_flags_clear | |
199 | 0, // value | |
200 | 0, // size | |
201 | elfcpp::STT_NOTYPE, // type | |
202 | elfcpp::STB_GLOBAL, // binding | |
203 | elfcpp::STV_DEFAULT, // visibility | |
204 | 0, // nonvis | |
205 | Symbol::SEGMENT_START, // offset_from_base | |
206 | false // only_if_ref | |
207 | }, | |
208 | { | |
209 | "end", // name | |
210 | elfcpp::PT_LOAD, // segment_type | |
211 | elfcpp::PF_X, // segment_flags_set | |
212 | elfcpp::PF(0), // segment_flags_clear | |
213 | 0, // value | |
214 | 0, // size | |
215 | elfcpp::STT_NOTYPE, // type | |
216 | elfcpp::STB_GLOBAL, // binding | |
217 | elfcpp::STV_DEFAULT, // visibility | |
218 | 0, // nonvis | |
219 | Symbol::SEGMENT_START, // offset_from_base | |
220 | false // only_if_ref | |
221 | } | |
222 | }; | |
223 | ||
224 | const int in_segment_count = sizeof in_segment / sizeof in_segment[0]; | |
225 | ||
226 | } // End anonymous namespace. | |
227 | ||
228 | namespace gold | |
229 | { | |
230 | ||
231 | void | |
232 | define_standard_symbols(Symbol_table* symtab, const Layout* layout, | |
233 | Target* target) | |
234 | { | |
235 | symtab->define_symbols(layout, target, in_section_count, in_section); | |
236 | symtab->define_symbols(layout, target, in_segment_count, in_segment); | |
237 | } | |
238 | ||
239 | } // End namespace gold. |