Commit | Line | Data |
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14bfc3f5 ILT |
1 | // resolve.cc -- symbol resolution for gold |
2 | ||
3 | #include "gold.h" | |
4 | ||
5 | #include "elfcpp.h" | |
6 | #include "target.h" | |
7 | #include "object.h" | |
8 | #include "symtab.h" | |
9 | ||
10 | namespace gold | |
11 | { | |
12 | ||
1564db8d ILT |
13 | // Symbol methods used in this file. |
14 | ||
15 | // Override the fields in Symbol. | |
16 | ||
17 | template<int size, bool big_endian> | |
18 | void | |
19 | Symbol::override_base(const elfcpp::Sym<size, big_endian>& sym, | |
20 | Object* object) | |
21 | { | |
ead1e424 ILT |
22 | assert(this->source_ == FROM_OBJECT); |
23 | this->u_.from_object.object = object; | |
24 | // FIXME: Handle SHN_XINDEX. | |
25 | this->u_.from_object.shnum = sym.get_st_shndx(); | |
1564db8d ILT |
26 | this->type_ = sym.get_st_type(); |
27 | this->binding_ = sym.get_st_bind(); | |
28 | this->visibility_ = sym.get_st_visibility(); | |
ead1e424 | 29 | this->nonvis_ = sym.get_st_nonvis(); |
1564db8d ILT |
30 | } |
31 | ||
32 | // Override the fields in Sized_symbol. | |
33 | ||
34 | template<int size> | |
35 | template<bool big_endian> | |
36 | void | |
37 | Sized_symbol<size>::override(const elfcpp::Sym<size, big_endian>& sym, | |
38 | Object* object) | |
39 | { | |
40 | this->override_base(sym, object); | |
41 | this->value_ = sym.get_st_value(); | |
ead1e424 | 42 | this->symsize_ = sym.get_st_size(); |
1564db8d ILT |
43 | } |
44 | ||
14bfc3f5 ILT |
45 | // Resolve a symbol. This is called the second and subsequent times |
46 | // we see a symbol. TO is the pre-existing symbol. SYM is the new | |
47 | // symbol, seen in OBJECT. | |
48 | ||
49 | template<int size, bool big_endian> | |
50 | void | |
1564db8d | 51 | Symbol_table::resolve(Sized_symbol<size>* to, |
14bfc3f5 ILT |
52 | const elfcpp::Sym<size, big_endian>& sym, |
53 | Object* object) | |
54 | { | |
55 | if (object->target()->has_resolve()) | |
56 | { | |
274e99f9 | 57 | Sized_target<size, big_endian>* sized_target; |
593f47df ILT |
58 | sized_target = object->sized_target |
59 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
60 | SELECT_SIZE_ENDIAN_ONLY(size, big_endian)); | |
274e99f9 | 61 | sized_target->resolve(to, sym, object); |
14bfc3f5 ILT |
62 | return; |
63 | } | |
64 | ||
65 | // Build a little code for each symbol. | |
66 | // Bit 0: 0 for global, 1 for weak. | |
67 | // Bit 1: 0 for regular object, 1 for shared object | |
68 | // Bits 2-3: 0 for normal, 1 for undefined, 2 for common | |
69 | // This gives us values from 0 to 11: | |
70 | ||
71 | enum | |
72 | { | |
73 | DEF = 0, | |
74 | WEAK_DEF = 1, | |
75 | DYN_DEF = 2, | |
76 | DYN_WEAK_DEF = 3, | |
77 | UNDEF = 4, | |
78 | WEAK_UNDEF = 5, | |
79 | DYN_UNDEF = 6, | |
80 | DYN_WEAK_UNDEF = 7, | |
81 | COMMON = 8, | |
82 | WEAK_COMMON = 9, | |
83 | DYN_COMMON = 10, | |
84 | DYN_WEAK_COMMON = 11 | |
85 | }; | |
86 | ||
87 | int tobits; | |
88 | switch (to->binding()) | |
89 | { | |
90 | case elfcpp::STB_GLOBAL: | |
91 | tobits = 0; | |
92 | break; | |
93 | ||
94 | case elfcpp::STB_WEAK: | |
95 | tobits = 1; | |
96 | break; | |
97 | ||
98 | case elfcpp::STB_LOCAL: | |
99 | // We should only see externally visible symbols in the symbol | |
100 | // table. | |
101 | abort(); | |
102 | ||
103 | default: | |
104 | // Any target which wants to handle STB_LOOS, etc., needs to | |
105 | // define a resolve method. | |
106 | abort(); | |
107 | } | |
108 | ||
109 | if (to->object() != NULL && to->object()->is_dynamic()) | |
110 | tobits |= (1 << 1); | |
111 | ||
112 | switch (to->shnum()) | |
113 | { | |
114 | case elfcpp::SHN_UNDEF: | |
115 | tobits |= (1 << 2); | |
116 | break; | |
117 | ||
118 | case elfcpp::SHN_COMMON: | |
119 | tobits |= (2 << 2); | |
120 | break; | |
121 | ||
122 | default: | |
1564db8d ILT |
123 | if (to->type() == elfcpp::STT_COMMON) |
124 | tobits |= (2 << 2); | |
14bfc3f5 ILT |
125 | break; |
126 | } | |
127 | ||
128 | int frombits; | |
129 | switch (sym.get_st_bind()) | |
130 | { | |
131 | case elfcpp::STB_GLOBAL: | |
132 | frombits = 0; | |
133 | break; | |
134 | ||
135 | case elfcpp::STB_WEAK: | |
136 | frombits = 1; | |
137 | break; | |
138 | ||
139 | case elfcpp::STB_LOCAL: | |
140 | fprintf(stderr, | |
141 | _("%s: %s: invalid STB_LOCAL symbol %s in external symbols\n"), | |
142 | program_name, object->name().c_str(), to->name()); | |
143 | gold_exit(false); | |
144 | ||
145 | default: | |
146 | fprintf(stderr, | |
147 | _("%s: %s: unsupported symbol binding %d for symbol %s\n"), | |
148 | program_name, object->name().c_str(), | |
149 | static_cast<int>(sym.get_st_bind()), to->name()); | |
150 | gold_exit(false); | |
151 | } | |
152 | ||
153 | if (object->is_dynamic()) | |
1564db8d ILT |
154 | { |
155 | frombits |= (1 << 1); | |
156 | ||
157 | // Record that we've seen this symbol in a dynamic object. | |
158 | to->set_in_dyn(); | |
159 | } | |
14bfc3f5 ILT |
160 | |
161 | switch (sym.get_st_shndx()) | |
162 | { | |
163 | case elfcpp::SHN_UNDEF: | |
164 | frombits |= (1 << 2); | |
165 | break; | |
166 | ||
167 | case elfcpp::SHN_COMMON: | |
168 | frombits |= (2 << 2); | |
169 | break; | |
170 | ||
171 | default: | |
1564db8d ILT |
172 | if (sym.get_st_type() == elfcpp::STT_COMMON) |
173 | frombits |= (2 << 2); | |
14bfc3f5 ILT |
174 | break; |
175 | } | |
176 | ||
1564db8d ILT |
177 | // FIXME: Warn if either but not both of TO and SYM are STT_TLS. |
178 | ||
14bfc3f5 ILT |
179 | // We use a giant switch table for symbol resolution. This code is |
180 | // unwieldy, but: 1) it is efficient; 2) we definitely handle all | |
181 | // cases; 3) it is easy to change the handling of a particular case. | |
182 | // The alternative would be a series of conditionals, but it is easy | |
183 | // to get the ordering wrong. This could also be done as a table, | |
184 | // but that is no easier to understand than this large switch | |
185 | // statement. | |
186 | ||
187 | switch (tobits * 16 + frombits) | |
188 | { | |
189 | case DEF * 16 + DEF: | |
12e14209 ILT |
190 | // Two definitions of the same symbol. |
191 | fprintf(stderr, "%s: %s: multiple definition of %s\n", | |
192 | program_name, object->name().c_str(), to->name()); | |
193 | // FIXME: Report locations. Record that we have seen an error. | |
14bfc3f5 ILT |
194 | return; |
195 | ||
196 | case WEAK_DEF * 16 + DEF: | |
1564db8d ILT |
197 | // We've seen a weak definition, and now we see a strong |
198 | // definition. In the original SVR4 linker, this was treated as | |
199 | // a multiple definition error. In the Solaris linker and the | |
200 | // GNU linker, a weak definition followed by a regular | |
201 | // definition causes the weak definition to be overridden. We | |
202 | // are currently compatible with the GNU linker. In the future | |
203 | // we should add a target specific option to change this. | |
204 | // FIXME. | |
205 | to->override(sym, object); | |
14bfc3f5 ILT |
206 | return; |
207 | ||
208 | case DYN_DEF * 16 + DEF: | |
209 | case DYN_WEAK_DEF * 16 + DEF: | |
1564db8d ILT |
210 | // We've seen a definition in a dynamic object, and now we see a |
211 | // definition in a regular object. The definition in the | |
212 | // regular object overrides the definition in the dynamic | |
213 | // object. | |
214 | to->override(sym, object); | |
215 | return; | |
216 | ||
14bfc3f5 ILT |
217 | case UNDEF * 16 + DEF: |
218 | case WEAK_UNDEF * 16 + DEF: | |
219 | case DYN_UNDEF * 16 + DEF: | |
220 | case DYN_WEAK_UNDEF * 16 + DEF: | |
1564db8d ILT |
221 | // We've seen an undefined reference, and now we see a |
222 | // definition. We use the definition. | |
223 | to->override(sym, object); | |
224 | return; | |
225 | ||
14bfc3f5 ILT |
226 | case COMMON * 16 + DEF: |
227 | case WEAK_COMMON * 16 + DEF: | |
228 | case DYN_COMMON * 16 + DEF: | |
229 | case DYN_WEAK_COMMON * 16 + DEF: | |
1564db8d ILT |
230 | // We've seen a common symbol and now we see a definition. The |
231 | // definition overrides. FIXME: We should optionally issue a | |
232 | // warning. | |
233 | to->override(sym, object); | |
234 | return; | |
14bfc3f5 ILT |
235 | |
236 | case DEF * 16 + WEAK_DEF: | |
237 | case WEAK_DEF * 16 + WEAK_DEF: | |
1564db8d ILT |
238 | // We've seen a definition and now we see a weak definition. We |
239 | // ignore the new weak definition. | |
240 | return; | |
241 | ||
14bfc3f5 ILT |
242 | case DYN_DEF * 16 + WEAK_DEF: |
243 | case DYN_WEAK_DEF * 16 + WEAK_DEF: | |
1564db8d ILT |
244 | // We've seen a dynamic definition and now we see a regular weak |
245 | // definition. The regular weak definition overrides. | |
246 | to->override(sym, object); | |
247 | return; | |
248 | ||
14bfc3f5 ILT |
249 | case UNDEF * 16 + WEAK_DEF: |
250 | case WEAK_UNDEF * 16 + WEAK_DEF: | |
251 | case DYN_UNDEF * 16 + WEAK_DEF: | |
252 | case DYN_WEAK_UNDEF * 16 + WEAK_DEF: | |
1564db8d ILT |
253 | // A weak definition of a currently undefined symbol. |
254 | to->override(sym, object); | |
255 | return; | |
256 | ||
14bfc3f5 ILT |
257 | case COMMON * 16 + WEAK_DEF: |
258 | case WEAK_COMMON * 16 + WEAK_DEF: | |
1564db8d ILT |
259 | // A weak definition does not override a common definition. |
260 | return; | |
261 | ||
14bfc3f5 ILT |
262 | case DYN_COMMON * 16 + WEAK_DEF: |
263 | case DYN_WEAK_COMMON * 16 + WEAK_DEF: | |
1564db8d ILT |
264 | // A weak definition does override a definition in a dynamic |
265 | // object. FIXME: We should optionally issue a warning. | |
266 | to->override(sym, object); | |
267 | return; | |
14bfc3f5 ILT |
268 | |
269 | case DEF * 16 + DYN_DEF: | |
270 | case WEAK_DEF * 16 + DYN_DEF: | |
271 | case DYN_DEF * 16 + DYN_DEF: | |
272 | case DYN_WEAK_DEF * 16 + DYN_DEF: | |
1564db8d ILT |
273 | // Ignore a dynamic definition if we already have a definition. |
274 | return; | |
275 | ||
14bfc3f5 ILT |
276 | case UNDEF * 16 + DYN_DEF: |
277 | case WEAK_UNDEF * 16 + DYN_DEF: | |
278 | case DYN_UNDEF * 16 + DYN_DEF: | |
279 | case DYN_WEAK_UNDEF * 16 + DYN_DEF: | |
1564db8d ILT |
280 | // Use a dynamic definition if we have a reference. |
281 | to->override(sym, object); | |
282 | return; | |
283 | ||
14bfc3f5 ILT |
284 | case COMMON * 16 + DYN_DEF: |
285 | case WEAK_COMMON * 16 + DYN_DEF: | |
286 | case DYN_COMMON * 16 + DYN_DEF: | |
287 | case DYN_WEAK_COMMON * 16 + DYN_DEF: | |
1564db8d ILT |
288 | // Ignore a dynamic definition if we already have a common |
289 | // definition. | |
290 | return; | |
14bfc3f5 ILT |
291 | |
292 | case DEF * 16 + DYN_WEAK_DEF: | |
293 | case WEAK_DEF * 16 + DYN_WEAK_DEF: | |
294 | case DYN_DEF * 16 + DYN_WEAK_DEF: | |
295 | case DYN_WEAK_DEF * 16 + DYN_WEAK_DEF: | |
1564db8d ILT |
296 | // Ignore a weak dynamic definition if we already have a |
297 | // definition. | |
298 | return; | |
299 | ||
14bfc3f5 ILT |
300 | case UNDEF * 16 + DYN_WEAK_DEF: |
301 | case WEAK_UNDEF * 16 + DYN_WEAK_DEF: | |
302 | case DYN_UNDEF * 16 + DYN_WEAK_DEF: | |
303 | case DYN_WEAK_UNDEF * 16 + DYN_WEAK_DEF: | |
1564db8d ILT |
304 | // Use a weak dynamic definition if we have a reference. |
305 | to->override(sym, object); | |
306 | return; | |
307 | ||
14bfc3f5 ILT |
308 | case COMMON * 16 + DYN_WEAK_DEF: |
309 | case WEAK_COMMON * 16 + DYN_WEAK_DEF: | |
310 | case DYN_COMMON * 16 + DYN_WEAK_DEF: | |
311 | case DYN_WEAK_COMMON * 16 + DYN_WEAK_DEF: | |
1564db8d ILT |
312 | // Ignore a weak dynamic definition if we already have a common |
313 | // definition. | |
314 | return; | |
14bfc3f5 ILT |
315 | |
316 | case DEF * 16 + UNDEF: | |
317 | case WEAK_DEF * 16 + UNDEF: | |
318 | case DYN_DEF * 16 + UNDEF: | |
319 | case DYN_WEAK_DEF * 16 + UNDEF: | |
320 | case UNDEF * 16 + UNDEF: | |
ead1e424 ILT |
321 | // A new undefined reference tells us nothing. |
322 | return; | |
323 | ||
14bfc3f5 ILT |
324 | case WEAK_UNDEF * 16 + UNDEF: |
325 | case DYN_UNDEF * 16 + UNDEF: | |
326 | case DYN_WEAK_UNDEF * 16 + UNDEF: | |
ead1e424 ILT |
327 | // A strong undef overrides a dynamic or weak undef. |
328 | to->override(sym, object); | |
329 | return; | |
330 | ||
14bfc3f5 ILT |
331 | case COMMON * 16 + UNDEF: |
332 | case WEAK_COMMON * 16 + UNDEF: | |
333 | case DYN_COMMON * 16 + UNDEF: | |
334 | case DYN_WEAK_COMMON * 16 + UNDEF: | |
1564db8d ILT |
335 | // A new undefined reference tells us nothing. |
336 | return; | |
14bfc3f5 ILT |
337 | |
338 | case DEF * 16 + WEAK_UNDEF: | |
339 | case WEAK_DEF * 16 + WEAK_UNDEF: | |
340 | case DYN_DEF * 16 + WEAK_UNDEF: | |
341 | case DYN_WEAK_DEF * 16 + WEAK_UNDEF: | |
342 | case UNDEF * 16 + WEAK_UNDEF: | |
343 | case WEAK_UNDEF * 16 + WEAK_UNDEF: | |
344 | case DYN_UNDEF * 16 + WEAK_UNDEF: | |
345 | case DYN_WEAK_UNDEF * 16 + WEAK_UNDEF: | |
346 | case COMMON * 16 + WEAK_UNDEF: | |
347 | case WEAK_COMMON * 16 + WEAK_UNDEF: | |
348 | case DYN_COMMON * 16 + WEAK_UNDEF: | |
349 | case DYN_WEAK_COMMON * 16 + WEAK_UNDEF: | |
1564db8d ILT |
350 | // A new weak undefined reference tells us nothing. |
351 | return; | |
14bfc3f5 ILT |
352 | |
353 | case DEF * 16 + DYN_UNDEF: | |
354 | case WEAK_DEF * 16 + DYN_UNDEF: | |
355 | case DYN_DEF * 16 + DYN_UNDEF: | |
356 | case DYN_WEAK_DEF * 16 + DYN_UNDEF: | |
357 | case UNDEF * 16 + DYN_UNDEF: | |
358 | case WEAK_UNDEF * 16 + DYN_UNDEF: | |
359 | case DYN_UNDEF * 16 + DYN_UNDEF: | |
360 | case DYN_WEAK_UNDEF * 16 + DYN_UNDEF: | |
361 | case COMMON * 16 + DYN_UNDEF: | |
362 | case WEAK_COMMON * 16 + DYN_UNDEF: | |
363 | case DYN_COMMON * 16 + DYN_UNDEF: | |
364 | case DYN_WEAK_COMMON * 16 + DYN_UNDEF: | |
1564db8d ILT |
365 | // A new dynamic undefined reference tells us nothing. |
366 | return; | |
14bfc3f5 ILT |
367 | |
368 | case DEF * 16 + DYN_WEAK_UNDEF: | |
369 | case WEAK_DEF * 16 + DYN_WEAK_UNDEF: | |
370 | case DYN_DEF * 16 + DYN_WEAK_UNDEF: | |
371 | case DYN_WEAK_DEF * 16 + DYN_WEAK_UNDEF: | |
372 | case UNDEF * 16 + DYN_WEAK_UNDEF: | |
373 | case WEAK_UNDEF * 16 + DYN_WEAK_UNDEF: | |
374 | case DYN_UNDEF * 16 + DYN_WEAK_UNDEF: | |
375 | case DYN_WEAK_UNDEF * 16 + DYN_WEAK_UNDEF: | |
376 | case COMMON * 16 + DYN_WEAK_UNDEF: | |
377 | case WEAK_COMMON * 16 + DYN_WEAK_UNDEF: | |
378 | case DYN_COMMON * 16 + DYN_WEAK_UNDEF: | |
379 | case DYN_WEAK_COMMON * 16 + DYN_WEAK_UNDEF: | |
1564db8d ILT |
380 | // A new weak dynamic undefined reference tells us nothing. |
381 | return; | |
14bfc3f5 ILT |
382 | |
383 | case DEF * 16 + COMMON: | |
1564db8d ILT |
384 | // A common symbol does not override a definition. |
385 | return; | |
386 | ||
14bfc3f5 ILT |
387 | case WEAK_DEF * 16 + COMMON: |
388 | case DYN_DEF * 16 + COMMON: | |
389 | case DYN_WEAK_DEF * 16 + COMMON: | |
1564db8d ILT |
390 | // A common symbol does override a weak definition or a dynamic |
391 | // definition. | |
392 | to->override(sym, object); | |
393 | return; | |
394 | ||
14bfc3f5 ILT |
395 | case UNDEF * 16 + COMMON: |
396 | case WEAK_UNDEF * 16 + COMMON: | |
397 | case DYN_UNDEF * 16 + COMMON: | |
398 | case DYN_WEAK_UNDEF * 16 + COMMON: | |
1564db8d ILT |
399 | // A common symbol is a definition for a reference. |
400 | to->override(sym, object); | |
401 | return; | |
402 | ||
14bfc3f5 | 403 | case COMMON * 16 + COMMON: |
ead1e424 ILT |
404 | // Set the size to the maximum. |
405 | if (sym.get_st_size() > to->symsize()) | |
406 | to->set_symsize(sym.get_st_size()); | |
407 | return; | |
408 | ||
14bfc3f5 | 409 | case WEAK_COMMON * 16 + COMMON: |
ead1e424 ILT |
410 | // I'm not sure just what a weak common symbol means, but |
411 | // presumably it can be overridden by a regular common symbol. | |
412 | to->override(sym, object); | |
413 | return; | |
414 | ||
14bfc3f5 ILT |
415 | case DYN_COMMON * 16 + COMMON: |
416 | case DYN_WEAK_COMMON * 16 + COMMON: | |
ead1e424 ILT |
417 | { |
418 | // Use the real common symbol, but adjust the size if necessary. | |
419 | typename Sized_symbol<size>::Size_type symsize = to->symsize(); | |
420 | to->override(sym, object); | |
421 | if (to->symsize() < symsize) | |
422 | to->set_symsize(symsize); | |
423 | } | |
424 | return; | |
14bfc3f5 ILT |
425 | |
426 | case DEF * 16 + WEAK_COMMON: | |
427 | case WEAK_DEF * 16 + WEAK_COMMON: | |
428 | case DYN_DEF * 16 + WEAK_COMMON: | |
429 | case DYN_WEAK_DEF * 16 + WEAK_COMMON: | |
ead1e424 ILT |
430 | // Whatever a weak common symbol is, it won't override a |
431 | // definition. | |
432 | return; | |
433 | ||
14bfc3f5 ILT |
434 | case UNDEF * 16 + WEAK_COMMON: |
435 | case WEAK_UNDEF * 16 + WEAK_COMMON: | |
436 | case DYN_UNDEF * 16 + WEAK_COMMON: | |
437 | case DYN_WEAK_UNDEF * 16 + WEAK_COMMON: | |
ead1e424 ILT |
438 | // A weak common symbol is better than an undefined symbol. |
439 | to->override(sym, object); | |
440 | return; | |
441 | ||
14bfc3f5 ILT |
442 | case COMMON * 16 + WEAK_COMMON: |
443 | case WEAK_COMMON * 16 + WEAK_COMMON: | |
444 | case DYN_COMMON * 16 + WEAK_COMMON: | |
445 | case DYN_WEAK_COMMON * 16 + WEAK_COMMON: | |
ead1e424 ILT |
446 | // Ignore a weak common symbol in the presence of a real common |
447 | // symbol. | |
448 | return; | |
14bfc3f5 ILT |
449 | |
450 | case DEF * 16 + DYN_COMMON: | |
451 | case WEAK_DEF * 16 + DYN_COMMON: | |
452 | case DYN_DEF * 16 + DYN_COMMON: | |
453 | case DYN_WEAK_DEF * 16 + DYN_COMMON: | |
ead1e424 ILT |
454 | // Ignore a dynamic common symbol in the presence of a |
455 | // definition. | |
456 | return; | |
457 | ||
14bfc3f5 ILT |
458 | case UNDEF * 16 + DYN_COMMON: |
459 | case WEAK_UNDEF * 16 + DYN_COMMON: | |
460 | case DYN_UNDEF * 16 + DYN_COMMON: | |
461 | case DYN_WEAK_UNDEF * 16 + DYN_COMMON: | |
ead1e424 ILT |
462 | // A dynamic common symbol is a definition of sorts. |
463 | to->override(sym, object); | |
464 | return; | |
465 | ||
14bfc3f5 ILT |
466 | case COMMON * 16 + DYN_COMMON: |
467 | case WEAK_COMMON * 16 + DYN_COMMON: | |
468 | case DYN_COMMON * 16 + DYN_COMMON: | |
469 | case DYN_WEAK_COMMON * 16 + DYN_COMMON: | |
ead1e424 ILT |
470 | // Set the size to the maximum. |
471 | if (sym.get_st_size() > to->symsize()) | |
472 | to->set_symsize(sym.get_st_size()); | |
473 | return; | |
14bfc3f5 ILT |
474 | |
475 | case DEF * 16 + DYN_WEAK_COMMON: | |
476 | case WEAK_DEF * 16 + DYN_WEAK_COMMON: | |
477 | case DYN_DEF * 16 + DYN_WEAK_COMMON: | |
478 | case DYN_WEAK_DEF * 16 + DYN_WEAK_COMMON: | |
ead1e424 ILT |
479 | // A common symbol is ignored in the face of a definition. |
480 | return; | |
481 | ||
14bfc3f5 ILT |
482 | case UNDEF * 16 + DYN_WEAK_COMMON: |
483 | case WEAK_UNDEF * 16 + DYN_WEAK_COMMON: | |
484 | case DYN_UNDEF * 16 + DYN_WEAK_COMMON: | |
485 | case DYN_WEAK_UNDEF * 16 + DYN_WEAK_COMMON: | |
ead1e424 ILT |
486 | // I guess a weak common symbol is better than a definition. |
487 | to->override(sym, object); | |
488 | return; | |
489 | ||
14bfc3f5 ILT |
490 | case COMMON * 16 + DYN_WEAK_COMMON: |
491 | case WEAK_COMMON * 16 + DYN_WEAK_COMMON: | |
492 | case DYN_COMMON * 16 + DYN_WEAK_COMMON: | |
493 | case DYN_WEAK_COMMON * 16 + DYN_WEAK_COMMON: | |
ead1e424 ILT |
494 | // Set the size to the maximum. |
495 | if (sym.get_st_size() > to->symsize()) | |
496 | to->set_symsize(sym.get_st_size()); | |
497 | return; | |
1564db8d ILT |
498 | |
499 | default: | |
500 | abort(); | |
14bfc3f5 ILT |
501 | } |
502 | } | |
503 | ||
504 | // Instantiate the templates we need. We could use the configure | |
505 | // script to restrict this to only the ones needed for implemented | |
506 | // targets. | |
507 | ||
508 | template | |
509 | void | |
510 | Symbol_table::resolve<32, true>( | |
1564db8d | 511 | Sized_symbol<32>* to, |
14bfc3f5 ILT |
512 | const elfcpp::Sym<32, true>& sym, |
513 | Object* object); | |
514 | ||
515 | template | |
516 | void | |
517 | Symbol_table::resolve<32, false>( | |
1564db8d | 518 | Sized_symbol<32>* to, |
14bfc3f5 ILT |
519 | const elfcpp::Sym<32, false>& sym, |
520 | Object* object); | |
521 | ||
522 | template | |
523 | void | |
524 | Symbol_table::resolve<64, true>( | |
1564db8d | 525 | Sized_symbol<64>* to, |
14bfc3f5 ILT |
526 | const elfcpp::Sym<64, true>& sym, |
527 | Object* object); | |
528 | ||
529 | template | |
530 | void | |
531 | Symbol_table::resolve<64, false>( | |
1564db8d | 532 | Sized_symbol<64>* to, |
14bfc3f5 ILT |
533 | const elfcpp::Sym<64, false>& sym, |
534 | Object* object); | |
535 | ||
536 | } // End namespace gold. |