Commit | Line | Data |
---|---|---|
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 | { | |
a3ad94ed | 22 | gold_assert(this->source_ == FROM_OBJECT); |
ead1e424 ILT |
23 | this->u_.from_object.object = object; |
24 | // FIXME: Handle SHN_XINDEX. | |
16649710 | 25 | this->u_.from_object.shndx = 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. | |
a3ad94ed | 101 | gold_unreachable(); |
14bfc3f5 ILT |
102 | |
103 | default: | |
104 | // Any target which wants to handle STB_LOOS, etc., needs to | |
105 | // define a resolve method. | |
a3ad94ed | 106 | gold_unreachable(); |
14bfc3f5 ILT |
107 | } |
108 | ||
c06b7b0b ILT |
109 | if (to->source() == Symbol::FROM_OBJECT |
110 | && to->object()->is_dynamic()) | |
14bfc3f5 ILT |
111 | tobits |= (1 << 1); |
112 | ||
16649710 | 113 | switch (to->shndx()) |
14bfc3f5 ILT |
114 | { |
115 | case elfcpp::SHN_UNDEF: | |
116 | tobits |= (1 << 2); | |
117 | break; | |
118 | ||
119 | case elfcpp::SHN_COMMON: | |
120 | tobits |= (2 << 2); | |
121 | break; | |
122 | ||
123 | default: | |
1564db8d ILT |
124 | if (to->type() == elfcpp::STT_COMMON) |
125 | tobits |= (2 << 2); | |
14bfc3f5 ILT |
126 | break; |
127 | } | |
128 | ||
129 | int frombits; | |
130 | switch (sym.get_st_bind()) | |
131 | { | |
132 | case elfcpp::STB_GLOBAL: | |
133 | frombits = 0; | |
134 | break; | |
135 | ||
136 | case elfcpp::STB_WEAK: | |
137 | frombits = 1; | |
138 | break; | |
139 | ||
140 | case elfcpp::STB_LOCAL: | |
141 | fprintf(stderr, | |
142 | _("%s: %s: invalid STB_LOCAL symbol %s in external symbols\n"), | |
143 | program_name, object->name().c_str(), to->name()); | |
144 | gold_exit(false); | |
145 | ||
146 | default: | |
147 | fprintf(stderr, | |
148 | _("%s: %s: unsupported symbol binding %d for symbol %s\n"), | |
149 | program_name, object->name().c_str(), | |
150 | static_cast<int>(sym.get_st_bind()), to->name()); | |
151 | gold_exit(false); | |
152 | } | |
153 | ||
154 | if (object->is_dynamic()) | |
1564db8d ILT |
155 | { |
156 | frombits |= (1 << 1); | |
157 | ||
158 | // Record that we've seen this symbol in a dynamic object. | |
159 | to->set_in_dyn(); | |
160 | } | |
14bfc3f5 ILT |
161 | |
162 | switch (sym.get_st_shndx()) | |
163 | { | |
164 | case elfcpp::SHN_UNDEF: | |
165 | frombits |= (1 << 2); | |
166 | break; | |
167 | ||
168 | case elfcpp::SHN_COMMON: | |
169 | frombits |= (2 << 2); | |
170 | break; | |
171 | ||
172 | default: | |
1564db8d ILT |
173 | if (sym.get_st_type() == elfcpp::STT_COMMON) |
174 | frombits |= (2 << 2); | |
14bfc3f5 ILT |
175 | break; |
176 | } | |
177 | ||
c06b7b0b ILT |
178 | if ((tobits & (1 << 1)) != (frombits & (1 << 1))) |
179 | { | |
180 | // This symbol is seen in both a dynamic object and a regular | |
181 | // object. That means that we need the symbol to go into the | |
182 | // dynamic symbol table, so that the dynamic linker can use the | |
183 | // regular symbol to override or define the dynamic symbol. | |
184 | to->set_needs_dynsym_entry(); | |
185 | } | |
186 | ||
1564db8d ILT |
187 | // FIXME: Warn if either but not both of TO and SYM are STT_TLS. |
188 | ||
14bfc3f5 ILT |
189 | // We use a giant switch table for symbol resolution. This code is |
190 | // unwieldy, but: 1) it is efficient; 2) we definitely handle all | |
191 | // cases; 3) it is easy to change the handling of a particular case. | |
192 | // The alternative would be a series of conditionals, but it is easy | |
193 | // to get the ordering wrong. This could also be done as a table, | |
194 | // but that is no easier to understand than this large switch | |
195 | // statement. | |
196 | ||
197 | switch (tobits * 16 + frombits) | |
198 | { | |
199 | case DEF * 16 + DEF: | |
12e14209 ILT |
200 | // Two definitions of the same symbol. |
201 | fprintf(stderr, "%s: %s: multiple definition of %s\n", | |
202 | program_name, object->name().c_str(), to->name()); | |
203 | // FIXME: Report locations. Record that we have seen an error. | |
14bfc3f5 ILT |
204 | return; |
205 | ||
206 | case WEAK_DEF * 16 + DEF: | |
1564db8d ILT |
207 | // We've seen a weak definition, and now we see a strong |
208 | // definition. In the original SVR4 linker, this was treated as | |
209 | // a multiple definition error. In the Solaris linker and the | |
210 | // GNU linker, a weak definition followed by a regular | |
211 | // definition causes the weak definition to be overridden. We | |
212 | // are currently compatible with the GNU linker. In the future | |
213 | // we should add a target specific option to change this. | |
214 | // FIXME. | |
215 | to->override(sym, object); | |
14bfc3f5 ILT |
216 | return; |
217 | ||
218 | case DYN_DEF * 16 + DEF: | |
219 | case DYN_WEAK_DEF * 16 + DEF: | |
1564db8d ILT |
220 | // We've seen a definition in a dynamic object, and now we see a |
221 | // definition in a regular object. The definition in the | |
222 | // regular object overrides the definition in the dynamic | |
223 | // object. | |
224 | to->override(sym, object); | |
225 | return; | |
226 | ||
14bfc3f5 ILT |
227 | case UNDEF * 16 + DEF: |
228 | case WEAK_UNDEF * 16 + DEF: | |
229 | case DYN_UNDEF * 16 + DEF: | |
230 | case DYN_WEAK_UNDEF * 16 + DEF: | |
1564db8d ILT |
231 | // We've seen an undefined reference, and now we see a |
232 | // definition. We use the definition. | |
233 | to->override(sym, object); | |
234 | return; | |
235 | ||
14bfc3f5 ILT |
236 | case COMMON * 16 + DEF: |
237 | case WEAK_COMMON * 16 + DEF: | |
238 | case DYN_COMMON * 16 + DEF: | |
239 | case DYN_WEAK_COMMON * 16 + DEF: | |
1564db8d ILT |
240 | // We've seen a common symbol and now we see a definition. The |
241 | // definition overrides. FIXME: We should optionally issue a | |
242 | // warning. | |
243 | to->override(sym, object); | |
244 | return; | |
14bfc3f5 ILT |
245 | |
246 | case DEF * 16 + WEAK_DEF: | |
247 | case WEAK_DEF * 16 + WEAK_DEF: | |
1564db8d ILT |
248 | // We've seen a definition and now we see a weak definition. We |
249 | // ignore the new weak definition. | |
250 | return; | |
251 | ||
14bfc3f5 ILT |
252 | case DYN_DEF * 16 + WEAK_DEF: |
253 | case DYN_WEAK_DEF * 16 + WEAK_DEF: | |
1564db8d ILT |
254 | // We've seen a dynamic definition and now we see a regular weak |
255 | // definition. The regular weak definition overrides. | |
256 | to->override(sym, object); | |
257 | return; | |
258 | ||
14bfc3f5 ILT |
259 | case UNDEF * 16 + WEAK_DEF: |
260 | case WEAK_UNDEF * 16 + WEAK_DEF: | |
261 | case DYN_UNDEF * 16 + WEAK_DEF: | |
262 | case DYN_WEAK_UNDEF * 16 + WEAK_DEF: | |
1564db8d ILT |
263 | // A weak definition of a currently undefined symbol. |
264 | to->override(sym, object); | |
265 | return; | |
266 | ||
14bfc3f5 ILT |
267 | case COMMON * 16 + WEAK_DEF: |
268 | case WEAK_COMMON * 16 + WEAK_DEF: | |
1564db8d ILT |
269 | // A weak definition does not override a common definition. |
270 | return; | |
271 | ||
14bfc3f5 ILT |
272 | case DYN_COMMON * 16 + WEAK_DEF: |
273 | case DYN_WEAK_COMMON * 16 + WEAK_DEF: | |
1564db8d ILT |
274 | // A weak definition does override a definition in a dynamic |
275 | // object. FIXME: We should optionally issue a warning. | |
276 | to->override(sym, object); | |
277 | return; | |
14bfc3f5 ILT |
278 | |
279 | case DEF * 16 + DYN_DEF: | |
280 | case WEAK_DEF * 16 + DYN_DEF: | |
281 | case DYN_DEF * 16 + DYN_DEF: | |
282 | case DYN_WEAK_DEF * 16 + DYN_DEF: | |
1564db8d ILT |
283 | // Ignore a dynamic definition if we already have a definition. |
284 | return; | |
285 | ||
14bfc3f5 ILT |
286 | case UNDEF * 16 + DYN_DEF: |
287 | case WEAK_UNDEF * 16 + DYN_DEF: | |
288 | case DYN_UNDEF * 16 + DYN_DEF: | |
289 | case DYN_WEAK_UNDEF * 16 + DYN_DEF: | |
1564db8d ILT |
290 | // Use a dynamic definition if we have a reference. |
291 | to->override(sym, object); | |
292 | return; | |
293 | ||
14bfc3f5 ILT |
294 | case COMMON * 16 + DYN_DEF: |
295 | case WEAK_COMMON * 16 + DYN_DEF: | |
296 | case DYN_COMMON * 16 + DYN_DEF: | |
297 | case DYN_WEAK_COMMON * 16 + DYN_DEF: | |
1564db8d ILT |
298 | // Ignore a dynamic definition if we already have a common |
299 | // definition. | |
300 | return; | |
14bfc3f5 ILT |
301 | |
302 | case DEF * 16 + DYN_WEAK_DEF: | |
303 | case WEAK_DEF * 16 + DYN_WEAK_DEF: | |
304 | case DYN_DEF * 16 + DYN_WEAK_DEF: | |
305 | case DYN_WEAK_DEF * 16 + DYN_WEAK_DEF: | |
1564db8d ILT |
306 | // Ignore a weak dynamic definition if we already have a |
307 | // definition. | |
308 | return; | |
309 | ||
14bfc3f5 ILT |
310 | case UNDEF * 16 + DYN_WEAK_DEF: |
311 | case WEAK_UNDEF * 16 + DYN_WEAK_DEF: | |
312 | case DYN_UNDEF * 16 + DYN_WEAK_DEF: | |
313 | case DYN_WEAK_UNDEF * 16 + DYN_WEAK_DEF: | |
1564db8d ILT |
314 | // Use a weak dynamic definition if we have a reference. |
315 | to->override(sym, object); | |
316 | return; | |
317 | ||
14bfc3f5 ILT |
318 | case COMMON * 16 + DYN_WEAK_DEF: |
319 | case WEAK_COMMON * 16 + DYN_WEAK_DEF: | |
320 | case DYN_COMMON * 16 + DYN_WEAK_DEF: | |
321 | case DYN_WEAK_COMMON * 16 + DYN_WEAK_DEF: | |
1564db8d ILT |
322 | // Ignore a weak dynamic definition if we already have a common |
323 | // definition. | |
324 | return; | |
14bfc3f5 ILT |
325 | |
326 | case DEF * 16 + UNDEF: | |
327 | case WEAK_DEF * 16 + UNDEF: | |
328 | case DYN_DEF * 16 + UNDEF: | |
329 | case DYN_WEAK_DEF * 16 + UNDEF: | |
330 | case UNDEF * 16 + UNDEF: | |
ead1e424 ILT |
331 | // A new undefined reference tells us nothing. |
332 | return; | |
333 | ||
14bfc3f5 ILT |
334 | case WEAK_UNDEF * 16 + UNDEF: |
335 | case DYN_UNDEF * 16 + UNDEF: | |
336 | case DYN_WEAK_UNDEF * 16 + UNDEF: | |
ead1e424 ILT |
337 | // A strong undef overrides a dynamic or weak undef. |
338 | to->override(sym, object); | |
339 | return; | |
340 | ||
14bfc3f5 ILT |
341 | case COMMON * 16 + UNDEF: |
342 | case WEAK_COMMON * 16 + UNDEF: | |
343 | case DYN_COMMON * 16 + UNDEF: | |
344 | case DYN_WEAK_COMMON * 16 + UNDEF: | |
1564db8d ILT |
345 | // A new undefined reference tells us nothing. |
346 | return; | |
14bfc3f5 ILT |
347 | |
348 | case DEF * 16 + WEAK_UNDEF: | |
349 | case WEAK_DEF * 16 + WEAK_UNDEF: | |
350 | case DYN_DEF * 16 + WEAK_UNDEF: | |
351 | case DYN_WEAK_DEF * 16 + WEAK_UNDEF: | |
352 | case UNDEF * 16 + WEAK_UNDEF: | |
353 | case WEAK_UNDEF * 16 + WEAK_UNDEF: | |
354 | case DYN_UNDEF * 16 + WEAK_UNDEF: | |
355 | case DYN_WEAK_UNDEF * 16 + WEAK_UNDEF: | |
356 | case COMMON * 16 + WEAK_UNDEF: | |
357 | case WEAK_COMMON * 16 + WEAK_UNDEF: | |
358 | case DYN_COMMON * 16 + WEAK_UNDEF: | |
359 | case DYN_WEAK_COMMON * 16 + WEAK_UNDEF: | |
1564db8d ILT |
360 | // A new weak undefined reference tells us nothing. |
361 | return; | |
14bfc3f5 ILT |
362 | |
363 | case DEF * 16 + DYN_UNDEF: | |
364 | case WEAK_DEF * 16 + DYN_UNDEF: | |
365 | case DYN_DEF * 16 + DYN_UNDEF: | |
366 | case DYN_WEAK_DEF * 16 + DYN_UNDEF: | |
367 | case UNDEF * 16 + DYN_UNDEF: | |
368 | case WEAK_UNDEF * 16 + DYN_UNDEF: | |
369 | case DYN_UNDEF * 16 + DYN_UNDEF: | |
370 | case DYN_WEAK_UNDEF * 16 + DYN_UNDEF: | |
371 | case COMMON * 16 + DYN_UNDEF: | |
372 | case WEAK_COMMON * 16 + DYN_UNDEF: | |
373 | case DYN_COMMON * 16 + DYN_UNDEF: | |
374 | case DYN_WEAK_COMMON * 16 + DYN_UNDEF: | |
1564db8d ILT |
375 | // A new dynamic undefined reference tells us nothing. |
376 | return; | |
14bfc3f5 ILT |
377 | |
378 | case DEF * 16 + DYN_WEAK_UNDEF: | |
379 | case WEAK_DEF * 16 + DYN_WEAK_UNDEF: | |
380 | case DYN_DEF * 16 + DYN_WEAK_UNDEF: | |
381 | case DYN_WEAK_DEF * 16 + DYN_WEAK_UNDEF: | |
382 | case UNDEF * 16 + DYN_WEAK_UNDEF: | |
383 | case WEAK_UNDEF * 16 + DYN_WEAK_UNDEF: | |
384 | case DYN_UNDEF * 16 + DYN_WEAK_UNDEF: | |
385 | case DYN_WEAK_UNDEF * 16 + DYN_WEAK_UNDEF: | |
386 | case COMMON * 16 + DYN_WEAK_UNDEF: | |
387 | case WEAK_COMMON * 16 + DYN_WEAK_UNDEF: | |
388 | case DYN_COMMON * 16 + DYN_WEAK_UNDEF: | |
389 | case DYN_WEAK_COMMON * 16 + DYN_WEAK_UNDEF: | |
1564db8d ILT |
390 | // A new weak dynamic undefined reference tells us nothing. |
391 | return; | |
14bfc3f5 ILT |
392 | |
393 | case DEF * 16 + COMMON: | |
1564db8d ILT |
394 | // A common symbol does not override a definition. |
395 | return; | |
396 | ||
14bfc3f5 ILT |
397 | case WEAK_DEF * 16 + COMMON: |
398 | case DYN_DEF * 16 + COMMON: | |
399 | case DYN_WEAK_DEF * 16 + COMMON: | |
1564db8d ILT |
400 | // A common symbol does override a weak definition or a dynamic |
401 | // definition. | |
402 | to->override(sym, object); | |
403 | return; | |
404 | ||
14bfc3f5 ILT |
405 | case UNDEF * 16 + COMMON: |
406 | case WEAK_UNDEF * 16 + COMMON: | |
407 | case DYN_UNDEF * 16 + COMMON: | |
408 | case DYN_WEAK_UNDEF * 16 + COMMON: | |
1564db8d ILT |
409 | // A common symbol is a definition for a reference. |
410 | to->override(sym, object); | |
411 | return; | |
412 | ||
14bfc3f5 | 413 | case COMMON * 16 + COMMON: |
ead1e424 ILT |
414 | // Set the size to the maximum. |
415 | if (sym.get_st_size() > to->symsize()) | |
416 | to->set_symsize(sym.get_st_size()); | |
417 | return; | |
418 | ||
14bfc3f5 | 419 | case WEAK_COMMON * 16 + COMMON: |
ead1e424 ILT |
420 | // I'm not sure just what a weak common symbol means, but |
421 | // presumably it can be overridden by a regular common symbol. | |
422 | to->override(sym, object); | |
423 | return; | |
424 | ||
14bfc3f5 ILT |
425 | case DYN_COMMON * 16 + COMMON: |
426 | case DYN_WEAK_COMMON * 16 + COMMON: | |
ead1e424 ILT |
427 | { |
428 | // Use the real common symbol, but adjust the size if necessary. | |
429 | typename Sized_symbol<size>::Size_type symsize = to->symsize(); | |
430 | to->override(sym, object); | |
431 | if (to->symsize() < symsize) | |
432 | to->set_symsize(symsize); | |
433 | } | |
434 | return; | |
14bfc3f5 ILT |
435 | |
436 | case DEF * 16 + WEAK_COMMON: | |
437 | case WEAK_DEF * 16 + WEAK_COMMON: | |
438 | case DYN_DEF * 16 + WEAK_COMMON: | |
439 | case DYN_WEAK_DEF * 16 + WEAK_COMMON: | |
ead1e424 ILT |
440 | // Whatever a weak common symbol is, it won't override a |
441 | // definition. | |
442 | return; | |
443 | ||
14bfc3f5 ILT |
444 | case UNDEF * 16 + WEAK_COMMON: |
445 | case WEAK_UNDEF * 16 + WEAK_COMMON: | |
446 | case DYN_UNDEF * 16 + WEAK_COMMON: | |
447 | case DYN_WEAK_UNDEF * 16 + WEAK_COMMON: | |
ead1e424 ILT |
448 | // A weak common symbol is better than an undefined symbol. |
449 | to->override(sym, object); | |
450 | return; | |
451 | ||
14bfc3f5 ILT |
452 | case COMMON * 16 + WEAK_COMMON: |
453 | case WEAK_COMMON * 16 + WEAK_COMMON: | |
454 | case DYN_COMMON * 16 + WEAK_COMMON: | |
455 | case DYN_WEAK_COMMON * 16 + WEAK_COMMON: | |
ead1e424 ILT |
456 | // Ignore a weak common symbol in the presence of a real common |
457 | // symbol. | |
458 | return; | |
14bfc3f5 ILT |
459 | |
460 | case DEF * 16 + DYN_COMMON: | |
461 | case WEAK_DEF * 16 + DYN_COMMON: | |
462 | case DYN_DEF * 16 + DYN_COMMON: | |
463 | case DYN_WEAK_DEF * 16 + DYN_COMMON: | |
ead1e424 ILT |
464 | // Ignore a dynamic common symbol in the presence of a |
465 | // definition. | |
466 | return; | |
467 | ||
14bfc3f5 ILT |
468 | case UNDEF * 16 + DYN_COMMON: |
469 | case WEAK_UNDEF * 16 + DYN_COMMON: | |
470 | case DYN_UNDEF * 16 + DYN_COMMON: | |
471 | case DYN_WEAK_UNDEF * 16 + DYN_COMMON: | |
ead1e424 ILT |
472 | // A dynamic common symbol is a definition of sorts. |
473 | to->override(sym, object); | |
474 | return; | |
475 | ||
14bfc3f5 ILT |
476 | case COMMON * 16 + DYN_COMMON: |
477 | case WEAK_COMMON * 16 + DYN_COMMON: | |
478 | case DYN_COMMON * 16 + DYN_COMMON: | |
479 | case DYN_WEAK_COMMON * 16 + DYN_COMMON: | |
ead1e424 ILT |
480 | // Set the size to the maximum. |
481 | if (sym.get_st_size() > to->symsize()) | |
482 | to->set_symsize(sym.get_st_size()); | |
483 | return; | |
14bfc3f5 ILT |
484 | |
485 | case DEF * 16 + DYN_WEAK_COMMON: | |
486 | case WEAK_DEF * 16 + DYN_WEAK_COMMON: | |
487 | case DYN_DEF * 16 + DYN_WEAK_COMMON: | |
488 | case DYN_WEAK_DEF * 16 + DYN_WEAK_COMMON: | |
ead1e424 ILT |
489 | // A common symbol is ignored in the face of a definition. |
490 | return; | |
491 | ||
14bfc3f5 ILT |
492 | case UNDEF * 16 + DYN_WEAK_COMMON: |
493 | case WEAK_UNDEF * 16 + DYN_WEAK_COMMON: | |
494 | case DYN_UNDEF * 16 + DYN_WEAK_COMMON: | |
495 | case DYN_WEAK_UNDEF * 16 + DYN_WEAK_COMMON: | |
ead1e424 ILT |
496 | // I guess a weak common symbol is better than a definition. |
497 | to->override(sym, object); | |
498 | return; | |
499 | ||
14bfc3f5 ILT |
500 | case COMMON * 16 + DYN_WEAK_COMMON: |
501 | case WEAK_COMMON * 16 + DYN_WEAK_COMMON: | |
502 | case DYN_COMMON * 16 + DYN_WEAK_COMMON: | |
503 | case DYN_WEAK_COMMON * 16 + DYN_WEAK_COMMON: | |
ead1e424 ILT |
504 | // Set the size to the maximum. |
505 | if (sym.get_st_size() > to->symsize()) | |
506 | to->set_symsize(sym.get_st_size()); | |
507 | return; | |
1564db8d ILT |
508 | |
509 | default: | |
a3ad94ed | 510 | gold_unreachable(); |
14bfc3f5 ILT |
511 | } |
512 | } | |
513 | ||
514 | // Instantiate the templates we need. We could use the configure | |
515 | // script to restrict this to only the ones needed for implemented | |
516 | // targets. | |
517 | ||
518 | template | |
519 | void | |
520 | Symbol_table::resolve<32, true>( | |
1564db8d | 521 | Sized_symbol<32>* to, |
14bfc3f5 ILT |
522 | const elfcpp::Sym<32, true>& sym, |
523 | Object* object); | |
524 | ||
525 | template | |
526 | void | |
527 | Symbol_table::resolve<32, false>( | |
1564db8d | 528 | Sized_symbol<32>* to, |
14bfc3f5 ILT |
529 | const elfcpp::Sym<32, false>& sym, |
530 | Object* object); | |
531 | ||
532 | template | |
533 | void | |
534 | Symbol_table::resolve<64, true>( | |
1564db8d | 535 | Sized_symbol<64>* to, |
14bfc3f5 ILT |
536 | const elfcpp::Sym<64, true>& sym, |
537 | Object* object); | |
538 | ||
539 | template | |
540 | void | |
541 | Symbol_table::resolve<64, false>( | |
1564db8d | 542 | Sized_symbol<64>* to, |
14bfc3f5 ILT |
543 | const elfcpp::Sym<64, false>& sym, |
544 | Object* object); | |
545 | ||
546 | } // End namespace gold. |