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, | |
14b31740 | 20 | Object* object, const char* version) |
1564db8d | 21 | { |
a3ad94ed | 22 | gold_assert(this->source_ == FROM_OBJECT); |
ead1e424 | 23 | this->u_.from_object.object = object; |
14b31740 ILT |
24 | if (version != NULL && this->version() != version) |
25 | { | |
26 | gold_assert(this->version() == NULL); | |
27 | this->version_ = version; | |
28 | } | |
ead1e424 | 29 | // FIXME: Handle SHN_XINDEX. |
16649710 | 30 | this->u_.from_object.shndx = sym.get_st_shndx(); |
1564db8d ILT |
31 | this->type_ = sym.get_st_type(); |
32 | this->binding_ = sym.get_st_bind(); | |
33 | this->visibility_ = sym.get_st_visibility(); | |
ead1e424 | 34 | this->nonvis_ = sym.get_st_nonvis(); |
0d4f1889 ILT |
35 | if (object->is_dynamic()) |
36 | this->in_dyn_ = true; | |
37 | else | |
38 | this->in_reg_ = true; | |
1564db8d ILT |
39 | } |
40 | ||
41 | // Override the fields in Sized_symbol. | |
42 | ||
43 | template<int size> | |
44 | template<bool big_endian> | |
45 | void | |
46 | Sized_symbol<size>::override(const elfcpp::Sym<size, big_endian>& sym, | |
14b31740 | 47 | Object* object, const char* version) |
1564db8d | 48 | { |
14b31740 | 49 | this->override_base(sym, object, version); |
1564db8d | 50 | this->value_ = sym.get_st_value(); |
ead1e424 | 51 | this->symsize_ = sym.get_st_size(); |
1564db8d ILT |
52 | } |
53 | ||
14bfc3f5 ILT |
54 | // Resolve a symbol. This is called the second and subsequent times |
55 | // we see a symbol. TO is the pre-existing symbol. SYM is the new | |
14b31740 | 56 | // symbol, seen in OBJECT. VERSION of the version of SYM. |
14bfc3f5 ILT |
57 | |
58 | template<int size, bool big_endian> | |
59 | void | |
1564db8d | 60 | Symbol_table::resolve(Sized_symbol<size>* to, |
14bfc3f5 | 61 | const elfcpp::Sym<size, big_endian>& sym, |
14b31740 | 62 | Object* object, const char* version) |
14bfc3f5 ILT |
63 | { |
64 | if (object->target()->has_resolve()) | |
65 | { | |
274e99f9 | 66 | Sized_target<size, big_endian>* sized_target; |
593f47df ILT |
67 | sized_target = object->sized_target |
68 | SELECT_SIZE_ENDIAN_NAME(size, big_endian) ( | |
69 | SELECT_SIZE_ENDIAN_ONLY(size, big_endian)); | |
14b31740 | 70 | sized_target->resolve(to, sym, object, version); |
14bfc3f5 ILT |
71 | return; |
72 | } | |
73 | ||
74 | // Build a little code for each symbol. | |
75 | // Bit 0: 0 for global, 1 for weak. | |
76 | // Bit 1: 0 for regular object, 1 for shared object | |
77 | // Bits 2-3: 0 for normal, 1 for undefined, 2 for common | |
78 | // This gives us values from 0 to 11: | |
79 | ||
80 | enum | |
81 | { | |
82 | DEF = 0, | |
83 | WEAK_DEF = 1, | |
84 | DYN_DEF = 2, | |
85 | DYN_WEAK_DEF = 3, | |
86 | UNDEF = 4, | |
87 | WEAK_UNDEF = 5, | |
88 | DYN_UNDEF = 6, | |
89 | DYN_WEAK_UNDEF = 7, | |
90 | COMMON = 8, | |
91 | WEAK_COMMON = 9, | |
92 | DYN_COMMON = 10, | |
93 | DYN_WEAK_COMMON = 11 | |
94 | }; | |
95 | ||
96 | int tobits; | |
97 | switch (to->binding()) | |
98 | { | |
99 | case elfcpp::STB_GLOBAL: | |
100 | tobits = 0; | |
101 | break; | |
102 | ||
103 | case elfcpp::STB_WEAK: | |
104 | tobits = 1; | |
105 | break; | |
106 | ||
107 | case elfcpp::STB_LOCAL: | |
108 | // We should only see externally visible symbols in the symbol | |
109 | // table. | |
a3ad94ed | 110 | gold_unreachable(); |
14bfc3f5 ILT |
111 | |
112 | default: | |
113 | // Any target which wants to handle STB_LOOS, etc., needs to | |
114 | // define a resolve method. | |
a3ad94ed | 115 | gold_unreachable(); |
14bfc3f5 ILT |
116 | } |
117 | ||
c06b7b0b ILT |
118 | if (to->source() == Symbol::FROM_OBJECT |
119 | && to->object()->is_dynamic()) | |
14bfc3f5 ILT |
120 | tobits |= (1 << 1); |
121 | ||
16649710 | 122 | switch (to->shndx()) |
14bfc3f5 ILT |
123 | { |
124 | case elfcpp::SHN_UNDEF: | |
125 | tobits |= (1 << 2); | |
126 | break; | |
127 | ||
128 | case elfcpp::SHN_COMMON: | |
129 | tobits |= (2 << 2); | |
130 | break; | |
131 | ||
132 | default: | |
1564db8d ILT |
133 | if (to->type() == elfcpp::STT_COMMON) |
134 | tobits |= (2 << 2); | |
14bfc3f5 ILT |
135 | break; |
136 | } | |
137 | ||
138 | int frombits; | |
139 | switch (sym.get_st_bind()) | |
140 | { | |
141 | case elfcpp::STB_GLOBAL: | |
142 | frombits = 0; | |
143 | break; | |
144 | ||
145 | case elfcpp::STB_WEAK: | |
146 | frombits = 1; | |
147 | break; | |
148 | ||
149 | case elfcpp::STB_LOCAL: | |
150 | fprintf(stderr, | |
151 | _("%s: %s: invalid STB_LOCAL symbol %s in external symbols\n"), | |
152 | program_name, object->name().c_str(), to->name()); | |
153 | gold_exit(false); | |
154 | ||
155 | default: | |
156 | fprintf(stderr, | |
157 | _("%s: %s: unsupported symbol binding %d for symbol %s\n"), | |
158 | program_name, object->name().c_str(), | |
159 | static_cast<int>(sym.get_st_bind()), to->name()); | |
160 | gold_exit(false); | |
161 | } | |
162 | ||
008db82e ILT |
163 | if (!object->is_dynamic()) |
164 | { | |
165 | // Record that we've seen this symbol in a regular object. | |
166 | to->set_in_reg(); | |
167 | } | |
168 | else | |
1564db8d ILT |
169 | { |
170 | frombits |= (1 << 1); | |
171 | ||
172 | // Record that we've seen this symbol in a dynamic object. | |
173 | to->set_in_dyn(); | |
174 | } | |
14bfc3f5 ILT |
175 | |
176 | switch (sym.get_st_shndx()) | |
177 | { | |
178 | case elfcpp::SHN_UNDEF: | |
179 | frombits |= (1 << 2); | |
180 | break; | |
181 | ||
182 | case elfcpp::SHN_COMMON: | |
183 | frombits |= (2 << 2); | |
184 | break; | |
185 | ||
186 | default: | |
1564db8d ILT |
187 | if (sym.get_st_type() == elfcpp::STT_COMMON) |
188 | frombits |= (2 << 2); | |
14bfc3f5 ILT |
189 | break; |
190 | } | |
191 | ||
1564db8d ILT |
192 | // FIXME: Warn if either but not both of TO and SYM are STT_TLS. |
193 | ||
14bfc3f5 ILT |
194 | // We use a giant switch table for symbol resolution. This code is |
195 | // unwieldy, but: 1) it is efficient; 2) we definitely handle all | |
196 | // cases; 3) it is easy to change the handling of a particular case. | |
197 | // The alternative would be a series of conditionals, but it is easy | |
198 | // to get the ordering wrong. This could also be done as a table, | |
199 | // but that is no easier to understand than this large switch | |
200 | // statement. | |
201 | ||
202 | switch (tobits * 16 + frombits) | |
203 | { | |
204 | case DEF * 16 + DEF: | |
12e14209 ILT |
205 | // Two definitions of the same symbol. |
206 | fprintf(stderr, "%s: %s: multiple definition of %s\n", | |
207 | program_name, object->name().c_str(), to->name()); | |
208 | // FIXME: Report locations. Record that we have seen an error. | |
14bfc3f5 ILT |
209 | return; |
210 | ||
211 | case WEAK_DEF * 16 + DEF: | |
1564db8d ILT |
212 | // We've seen a weak definition, and now we see a strong |
213 | // definition. In the original SVR4 linker, this was treated as | |
214 | // a multiple definition error. In the Solaris linker and the | |
215 | // GNU linker, a weak definition followed by a regular | |
216 | // definition causes the weak definition to be overridden. We | |
217 | // are currently compatible with the GNU linker. In the future | |
218 | // we should add a target specific option to change this. | |
219 | // FIXME. | |
14b31740 | 220 | to->override(sym, object, version); |
14bfc3f5 ILT |
221 | return; |
222 | ||
223 | case DYN_DEF * 16 + DEF: | |
224 | case DYN_WEAK_DEF * 16 + DEF: | |
1564db8d ILT |
225 | // We've seen a definition in a dynamic object, and now we see a |
226 | // definition in a regular object. The definition in the | |
227 | // regular object overrides the definition in the dynamic | |
228 | // object. | |
14b31740 | 229 | to->override(sym, object, version); |
1564db8d ILT |
230 | return; |
231 | ||
14bfc3f5 ILT |
232 | case UNDEF * 16 + DEF: |
233 | case WEAK_UNDEF * 16 + DEF: | |
234 | case DYN_UNDEF * 16 + DEF: | |
235 | case DYN_WEAK_UNDEF * 16 + DEF: | |
1564db8d ILT |
236 | // We've seen an undefined reference, and now we see a |
237 | // definition. We use the definition. | |
14b31740 | 238 | to->override(sym, object, version); |
1564db8d ILT |
239 | return; |
240 | ||
14bfc3f5 ILT |
241 | case COMMON * 16 + DEF: |
242 | case WEAK_COMMON * 16 + DEF: | |
243 | case DYN_COMMON * 16 + DEF: | |
244 | case DYN_WEAK_COMMON * 16 + DEF: | |
1564db8d | 245 | // We've seen a common symbol and now we see a definition. The |
14b31740 | 246 | // definition overrides. FIXME: We should optionally issue, version a |
1564db8d | 247 | // warning. |
14b31740 | 248 | to->override(sym, object, version); |
1564db8d | 249 | return; |
14bfc3f5 ILT |
250 | |
251 | case DEF * 16 + WEAK_DEF: | |
252 | case WEAK_DEF * 16 + WEAK_DEF: | |
1564db8d ILT |
253 | // We've seen a definition and now we see a weak definition. We |
254 | // ignore the new weak definition. | |
255 | return; | |
256 | ||
14bfc3f5 ILT |
257 | case DYN_DEF * 16 + WEAK_DEF: |
258 | case DYN_WEAK_DEF * 16 + WEAK_DEF: | |
1564db8d ILT |
259 | // We've seen a dynamic definition and now we see a regular weak |
260 | // definition. The regular weak definition overrides. | |
14b31740 | 261 | to->override(sym, object, version); |
1564db8d ILT |
262 | return; |
263 | ||
14bfc3f5 ILT |
264 | case UNDEF * 16 + WEAK_DEF: |
265 | case WEAK_UNDEF * 16 + WEAK_DEF: | |
266 | case DYN_UNDEF * 16 + WEAK_DEF: | |
267 | case DYN_WEAK_UNDEF * 16 + WEAK_DEF: | |
1564db8d | 268 | // A weak definition of a currently undefined symbol. |
14b31740 | 269 | to->override(sym, object, version); |
1564db8d ILT |
270 | return; |
271 | ||
14bfc3f5 ILT |
272 | case COMMON * 16 + WEAK_DEF: |
273 | case WEAK_COMMON * 16 + WEAK_DEF: | |
1564db8d ILT |
274 | // A weak definition does not override a common definition. |
275 | return; | |
276 | ||
14bfc3f5 ILT |
277 | case DYN_COMMON * 16 + WEAK_DEF: |
278 | case DYN_WEAK_COMMON * 16 + WEAK_DEF: | |
1564db8d ILT |
279 | // A weak definition does override a definition in a dynamic |
280 | // object. FIXME: We should optionally issue a warning. | |
14b31740 | 281 | to->override(sym, object, version); |
1564db8d | 282 | return; |
14bfc3f5 ILT |
283 | |
284 | case DEF * 16 + DYN_DEF: | |
285 | case WEAK_DEF * 16 + DYN_DEF: | |
286 | case DYN_DEF * 16 + DYN_DEF: | |
287 | case DYN_WEAK_DEF * 16 + DYN_DEF: | |
1564db8d ILT |
288 | // Ignore a dynamic definition if we already have a definition. |
289 | return; | |
290 | ||
14bfc3f5 ILT |
291 | case UNDEF * 16 + DYN_DEF: |
292 | case WEAK_UNDEF * 16 + DYN_DEF: | |
293 | case DYN_UNDEF * 16 + DYN_DEF: | |
294 | case DYN_WEAK_UNDEF * 16 + DYN_DEF: | |
1564db8d | 295 | // Use a dynamic definition if we have a reference. |
14b31740 | 296 | to->override(sym, object, version); |
1564db8d ILT |
297 | return; |
298 | ||
14bfc3f5 ILT |
299 | case COMMON * 16 + DYN_DEF: |
300 | case WEAK_COMMON * 16 + DYN_DEF: | |
301 | case DYN_COMMON * 16 + DYN_DEF: | |
302 | case DYN_WEAK_COMMON * 16 + DYN_DEF: | |
1564db8d ILT |
303 | // Ignore a dynamic definition if we already have a common |
304 | // definition. | |
305 | return; | |
14bfc3f5 ILT |
306 | |
307 | case DEF * 16 + DYN_WEAK_DEF: | |
308 | case WEAK_DEF * 16 + DYN_WEAK_DEF: | |
309 | case DYN_DEF * 16 + DYN_WEAK_DEF: | |
310 | case DYN_WEAK_DEF * 16 + DYN_WEAK_DEF: | |
1564db8d ILT |
311 | // Ignore a weak dynamic definition if we already have a |
312 | // definition. | |
313 | return; | |
314 | ||
14bfc3f5 ILT |
315 | case UNDEF * 16 + DYN_WEAK_DEF: |
316 | case WEAK_UNDEF * 16 + DYN_WEAK_DEF: | |
317 | case DYN_UNDEF * 16 + DYN_WEAK_DEF: | |
318 | case DYN_WEAK_UNDEF * 16 + DYN_WEAK_DEF: | |
1564db8d | 319 | // Use a weak dynamic definition if we have a reference. |
14b31740 | 320 | to->override(sym, object, version); |
1564db8d ILT |
321 | return; |
322 | ||
14bfc3f5 ILT |
323 | case COMMON * 16 + DYN_WEAK_DEF: |
324 | case WEAK_COMMON * 16 + DYN_WEAK_DEF: | |
325 | case DYN_COMMON * 16 + DYN_WEAK_DEF: | |
326 | case DYN_WEAK_COMMON * 16 + DYN_WEAK_DEF: | |
1564db8d ILT |
327 | // Ignore a weak dynamic definition if we already have a common |
328 | // definition. | |
329 | return; | |
14bfc3f5 ILT |
330 | |
331 | case DEF * 16 + UNDEF: | |
332 | case WEAK_DEF * 16 + UNDEF: | |
333 | case DYN_DEF * 16 + UNDEF: | |
334 | case DYN_WEAK_DEF * 16 + UNDEF: | |
335 | case UNDEF * 16 + UNDEF: | |
ead1e424 ILT |
336 | // A new undefined reference tells us nothing. |
337 | return; | |
338 | ||
14bfc3f5 ILT |
339 | case WEAK_UNDEF * 16 + UNDEF: |
340 | case DYN_UNDEF * 16 + UNDEF: | |
341 | case DYN_WEAK_UNDEF * 16 + UNDEF: | |
ead1e424 | 342 | // A strong undef overrides a dynamic or weak undef. |
14b31740 | 343 | to->override(sym, object, version); |
ead1e424 ILT |
344 | return; |
345 | ||
14bfc3f5 ILT |
346 | case COMMON * 16 + UNDEF: |
347 | case WEAK_COMMON * 16 + UNDEF: | |
348 | case DYN_COMMON * 16 + UNDEF: | |
349 | case DYN_WEAK_COMMON * 16 + UNDEF: | |
1564db8d ILT |
350 | // A new undefined reference tells us nothing. |
351 | return; | |
14bfc3f5 ILT |
352 | |
353 | case DEF * 16 + WEAK_UNDEF: | |
354 | case WEAK_DEF * 16 + WEAK_UNDEF: | |
355 | case DYN_DEF * 16 + WEAK_UNDEF: | |
356 | case DYN_WEAK_DEF * 16 + WEAK_UNDEF: | |
357 | case UNDEF * 16 + WEAK_UNDEF: | |
358 | case WEAK_UNDEF * 16 + WEAK_UNDEF: | |
359 | case DYN_UNDEF * 16 + WEAK_UNDEF: | |
360 | case DYN_WEAK_UNDEF * 16 + WEAK_UNDEF: | |
361 | case COMMON * 16 + WEAK_UNDEF: | |
362 | case WEAK_COMMON * 16 + WEAK_UNDEF: | |
363 | case DYN_COMMON * 16 + WEAK_UNDEF: | |
364 | case DYN_WEAK_COMMON * 16 + WEAK_UNDEF: | |
1564db8d ILT |
365 | // A new weak undefined reference tells us nothing. |
366 | return; | |
14bfc3f5 ILT |
367 | |
368 | case DEF * 16 + DYN_UNDEF: | |
369 | case WEAK_DEF * 16 + DYN_UNDEF: | |
370 | case DYN_DEF * 16 + DYN_UNDEF: | |
371 | case DYN_WEAK_DEF * 16 + DYN_UNDEF: | |
372 | case UNDEF * 16 + DYN_UNDEF: | |
373 | case WEAK_UNDEF * 16 + DYN_UNDEF: | |
374 | case DYN_UNDEF * 16 + DYN_UNDEF: | |
375 | case DYN_WEAK_UNDEF * 16 + DYN_UNDEF: | |
376 | case COMMON * 16 + DYN_UNDEF: | |
377 | case WEAK_COMMON * 16 + DYN_UNDEF: | |
378 | case DYN_COMMON * 16 + DYN_UNDEF: | |
379 | case DYN_WEAK_COMMON * 16 + DYN_UNDEF: | |
1564db8d ILT |
380 | // A new dynamic undefined reference tells us nothing. |
381 | return; | |
14bfc3f5 ILT |
382 | |
383 | case DEF * 16 + DYN_WEAK_UNDEF: | |
384 | case WEAK_DEF * 16 + DYN_WEAK_UNDEF: | |
385 | case DYN_DEF * 16 + DYN_WEAK_UNDEF: | |
386 | case DYN_WEAK_DEF * 16 + DYN_WEAK_UNDEF: | |
387 | case UNDEF * 16 + DYN_WEAK_UNDEF: | |
388 | case WEAK_UNDEF * 16 + DYN_WEAK_UNDEF: | |
389 | case DYN_UNDEF * 16 + DYN_WEAK_UNDEF: | |
390 | case DYN_WEAK_UNDEF * 16 + DYN_WEAK_UNDEF: | |
391 | case COMMON * 16 + DYN_WEAK_UNDEF: | |
392 | case WEAK_COMMON * 16 + DYN_WEAK_UNDEF: | |
393 | case DYN_COMMON * 16 + DYN_WEAK_UNDEF: | |
394 | case DYN_WEAK_COMMON * 16 + DYN_WEAK_UNDEF: | |
1564db8d ILT |
395 | // A new weak dynamic undefined reference tells us nothing. |
396 | return; | |
14bfc3f5 ILT |
397 | |
398 | case DEF * 16 + COMMON: | |
1564db8d ILT |
399 | // A common symbol does not override a definition. |
400 | return; | |
401 | ||
14bfc3f5 ILT |
402 | case WEAK_DEF * 16 + COMMON: |
403 | case DYN_DEF * 16 + COMMON: | |
404 | case DYN_WEAK_DEF * 16 + COMMON: | |
1564db8d ILT |
405 | // A common symbol does override a weak definition or a dynamic |
406 | // definition. | |
14b31740 | 407 | to->override(sym, object, version); |
1564db8d ILT |
408 | return; |
409 | ||
14bfc3f5 ILT |
410 | case UNDEF * 16 + COMMON: |
411 | case WEAK_UNDEF * 16 + COMMON: | |
412 | case DYN_UNDEF * 16 + COMMON: | |
413 | case DYN_WEAK_UNDEF * 16 + COMMON: | |
1564db8d | 414 | // A common symbol is a definition for a reference. |
14b31740 | 415 | to->override(sym, object, version); |
1564db8d ILT |
416 | return; |
417 | ||
14bfc3f5 | 418 | case COMMON * 16 + COMMON: |
ead1e424 ILT |
419 | // Set the size to the maximum. |
420 | if (sym.get_st_size() > to->symsize()) | |
421 | to->set_symsize(sym.get_st_size()); | |
422 | return; | |
423 | ||
14bfc3f5 | 424 | case WEAK_COMMON * 16 + COMMON: |
ead1e424 ILT |
425 | // I'm not sure just what a weak common symbol means, but |
426 | // presumably it can be overridden by a regular common symbol. | |
14b31740 | 427 | to->override(sym, object, version); |
ead1e424 ILT |
428 | return; |
429 | ||
14bfc3f5 ILT |
430 | case DYN_COMMON * 16 + COMMON: |
431 | case DYN_WEAK_COMMON * 16 + COMMON: | |
ead1e424 ILT |
432 | { |
433 | // Use the real common symbol, but adjust the size if necessary. | |
434 | typename Sized_symbol<size>::Size_type symsize = to->symsize(); | |
14b31740 | 435 | to->override(sym, object, version); |
ead1e424 ILT |
436 | if (to->symsize() < symsize) |
437 | to->set_symsize(symsize); | |
438 | } | |
439 | return; | |
14bfc3f5 ILT |
440 | |
441 | case DEF * 16 + WEAK_COMMON: | |
442 | case WEAK_DEF * 16 + WEAK_COMMON: | |
443 | case DYN_DEF * 16 + WEAK_COMMON: | |
444 | case DYN_WEAK_DEF * 16 + WEAK_COMMON: | |
ead1e424 ILT |
445 | // Whatever a weak common symbol is, it won't override a |
446 | // definition. | |
447 | return; | |
448 | ||
14bfc3f5 ILT |
449 | case UNDEF * 16 + WEAK_COMMON: |
450 | case WEAK_UNDEF * 16 + WEAK_COMMON: | |
451 | case DYN_UNDEF * 16 + WEAK_COMMON: | |
452 | case DYN_WEAK_UNDEF * 16 + WEAK_COMMON: | |
ead1e424 | 453 | // A weak common symbol is better than an undefined symbol. |
14b31740 | 454 | to->override(sym, object, version); |
ead1e424 ILT |
455 | return; |
456 | ||
14bfc3f5 ILT |
457 | case COMMON * 16 + WEAK_COMMON: |
458 | case WEAK_COMMON * 16 + WEAK_COMMON: | |
459 | case DYN_COMMON * 16 + WEAK_COMMON: | |
460 | case DYN_WEAK_COMMON * 16 + WEAK_COMMON: | |
ead1e424 ILT |
461 | // Ignore a weak common symbol in the presence of a real common |
462 | // symbol. | |
463 | return; | |
14bfc3f5 ILT |
464 | |
465 | case DEF * 16 + DYN_COMMON: | |
466 | case WEAK_DEF * 16 + DYN_COMMON: | |
467 | case DYN_DEF * 16 + DYN_COMMON: | |
468 | case DYN_WEAK_DEF * 16 + DYN_COMMON: | |
ead1e424 ILT |
469 | // Ignore a dynamic common symbol in the presence of a |
470 | // definition. | |
471 | return; | |
472 | ||
14bfc3f5 ILT |
473 | case UNDEF * 16 + DYN_COMMON: |
474 | case WEAK_UNDEF * 16 + DYN_COMMON: | |
475 | case DYN_UNDEF * 16 + DYN_COMMON: | |
476 | case DYN_WEAK_UNDEF * 16 + DYN_COMMON: | |
ead1e424 | 477 | // A dynamic common symbol is a definition of sorts. |
14b31740 | 478 | to->override(sym, object, version); |
ead1e424 ILT |
479 | return; |
480 | ||
14bfc3f5 ILT |
481 | case COMMON * 16 + DYN_COMMON: |
482 | case WEAK_COMMON * 16 + DYN_COMMON: | |
483 | case DYN_COMMON * 16 + DYN_COMMON: | |
484 | case DYN_WEAK_COMMON * 16 + DYN_COMMON: | |
ead1e424 ILT |
485 | // Set the size to the maximum. |
486 | if (sym.get_st_size() > to->symsize()) | |
487 | to->set_symsize(sym.get_st_size()); | |
488 | return; | |
14bfc3f5 ILT |
489 | |
490 | case DEF * 16 + DYN_WEAK_COMMON: | |
491 | case WEAK_DEF * 16 + DYN_WEAK_COMMON: | |
492 | case DYN_DEF * 16 + DYN_WEAK_COMMON: | |
493 | case DYN_WEAK_DEF * 16 + DYN_WEAK_COMMON: | |
ead1e424 ILT |
494 | // A common symbol is ignored in the face of a definition. |
495 | return; | |
496 | ||
14bfc3f5 ILT |
497 | case UNDEF * 16 + DYN_WEAK_COMMON: |
498 | case WEAK_UNDEF * 16 + DYN_WEAK_COMMON: | |
499 | case DYN_UNDEF * 16 + DYN_WEAK_COMMON: | |
500 | case DYN_WEAK_UNDEF * 16 + DYN_WEAK_COMMON: | |
ead1e424 | 501 | // I guess a weak common symbol is better than a definition. |
14b31740 | 502 | to->override(sym, object, version); |
ead1e424 ILT |
503 | return; |
504 | ||
14bfc3f5 ILT |
505 | case COMMON * 16 + DYN_WEAK_COMMON: |
506 | case WEAK_COMMON * 16 + DYN_WEAK_COMMON: | |
507 | case DYN_COMMON * 16 + DYN_WEAK_COMMON: | |
508 | case DYN_WEAK_COMMON * 16 + DYN_WEAK_COMMON: | |
ead1e424 ILT |
509 | // Set the size to the maximum. |
510 | if (sym.get_st_size() > to->symsize()) | |
511 | to->set_symsize(sym.get_st_size()); | |
512 | return; | |
1564db8d ILT |
513 | |
514 | default: | |
a3ad94ed | 515 | gold_unreachable(); |
14bfc3f5 ILT |
516 | } |
517 | } | |
518 | ||
519 | // Instantiate the templates we need. We could use the configure | |
520 | // script to restrict this to only the ones needed for implemented | |
521 | // targets. | |
522 | ||
523 | template | |
524 | void | |
525 | Symbol_table::resolve<32, true>( | |
1564db8d | 526 | Sized_symbol<32>* to, |
14bfc3f5 | 527 | const elfcpp::Sym<32, true>& sym, |
14b31740 ILT |
528 | Object* object, |
529 | const char* version); | |
14bfc3f5 ILT |
530 | |
531 | template | |
532 | void | |
533 | Symbol_table::resolve<32, false>( | |
1564db8d | 534 | Sized_symbol<32>* to, |
14bfc3f5 | 535 | const elfcpp::Sym<32, false>& sym, |
14b31740 ILT |
536 | Object* object, |
537 | const char* version); | |
14bfc3f5 ILT |
538 | |
539 | template | |
540 | void | |
541 | Symbol_table::resolve<64, true>( | |
1564db8d | 542 | Sized_symbol<64>* to, |
14bfc3f5 | 543 | const elfcpp::Sym<64, true>& sym, |
14b31740 ILT |
544 | Object* object, |
545 | const char* version); | |
14bfc3f5 ILT |
546 | |
547 | template | |
548 | void | |
549 | Symbol_table::resolve<64, false>( | |
1564db8d | 550 | Sized_symbol<64>* to, |
14bfc3f5 | 551 | const elfcpp::Sym<64, false>& sym, |
14b31740 ILT |
552 | Object* object, |
553 | const char* version); | |
14bfc3f5 ILT |
554 | |
555 | } // End namespace gold. |