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61ba1cf9 ILT |
1 | // target-reloc.h -- target specific relocation support -*- C++ -*- |
2 | ||
ebdbb458 | 3 | // Copyright 2006, 2007, 2008 Free Software Foundation, Inc. |
6cb15b7f ILT |
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 | ||
61ba1cf9 ILT |
23 | #ifndef GOLD_TARGET_RELOC_H |
24 | #define GOLD_TARGET_RELOC_H | |
25 | ||
26 | #include "elfcpp.h" | |
27 | #include "symtab.h" | |
6a74a719 | 28 | #include "reloc.h" |
c06b7b0b | 29 | #include "reloc-types.h" |
61ba1cf9 ILT |
30 | |
31 | namespace gold | |
32 | { | |
33 | ||
6a74a719 ILT |
34 | // This function implements the generic part of reloc scanning. The |
35 | // template parameter Scan must be a class type which provides two | |
36 | // functions: local() and global(). Those functions implement the | |
37 | // machine specific part of scanning. We do it this way to | |
38 | // avoidmaking a function call for each relocation, and to avoid | |
39 | // repeating the generic code for each target. | |
92e059d8 | 40 | |
ead1e424 ILT |
41 | template<int size, bool big_endian, typename Target_type, int sh_type, |
42 | typename Scan> | |
92e059d8 ILT |
43 | inline void |
44 | scan_relocs( | |
45 | const General_options& options, | |
46 | Symbol_table* symtab, | |
ead1e424 ILT |
47 | Layout* layout, |
48 | Target_type* target, | |
f6ce93d6 | 49 | Sized_relobj<size, big_endian>* object, |
a3ad94ed | 50 | unsigned int data_shndx, |
92e059d8 ILT |
51 | const unsigned char* prelocs, |
52 | size_t reloc_count, | |
730cdc88 ILT |
53 | Output_section* output_section, |
54 | bool needs_special_offset_handling, | |
92e059d8 | 55 | size_t local_count, |
730cdc88 | 56 | const unsigned char* plocal_syms) |
92e059d8 ILT |
57 | { |
58 | typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype; | |
59 | const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size; | |
60 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
61 | Scan scan; | |
62 | ||
63 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
64 | { | |
65 | Reltype reloc(prelocs); | |
66 | ||
730cdc88 ILT |
67 | if (needs_special_offset_handling |
68 | && !output_section->is_input_address_mapped(object, data_shndx, | |
69 | reloc.get_r_offset())) | |
70 | continue; | |
71 | ||
92e059d8 ILT |
72 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
73 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
74 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
75 | ||
76 | if (r_sym < local_count) | |
77 | { | |
a3ad94ed | 78 | gold_assert(plocal_syms != NULL); |
92e059d8 ILT |
79 | typename elfcpp::Sym<size, big_endian> lsym(plocal_syms |
80 | + r_sym * sym_size); | |
81 | const unsigned int shndx = lsym.get_st_shndx(); | |
82 | if (shndx < elfcpp::SHN_LORESERVE | |
ead1e424 | 83 | && shndx != elfcpp::SHN_UNDEF |
92e059d8 ILT |
84 | && !object->is_section_included(lsym.get_st_shndx())) |
85 | { | |
86 | // RELOC is a relocation against a local symbol in a | |
87 | // section we are discarding. We can ignore this | |
88 | // relocation. It will eventually become a reloc | |
89 | // against the value zero. | |
90 | // | |
91 | // FIXME: We should issue a warning if this is an | |
92 | // allocated section; is this the best place to do it? | |
93 | // | |
94 | // FIXME: The old GNU linker would in some cases look | |
95 | // for the linkonce section which caused this section to | |
96 | // be discarded, and, if the other section was the same | |
97 | // size, change the reloc to refer to the other section. | |
98 | // That seems risky and weird to me, and I don't know of | |
99 | // any case where it is actually required. | |
100 | ||
101 | continue; | |
102 | } | |
103 | ||
a3ad94ed | 104 | scan.local(options, symtab, layout, target, object, data_shndx, |
07f397ab | 105 | output_section, reloc, r_type, lsym); |
92e059d8 ILT |
106 | } |
107 | else | |
108 | { | |
730cdc88 | 109 | Symbol* gsym = object->global_symbol(r_sym); |
a3ad94ed | 110 | gold_assert(gsym != NULL); |
92e059d8 ILT |
111 | if (gsym->is_forwarder()) |
112 | gsym = symtab->resolve_forwards(gsym); | |
113 | ||
a3ad94ed | 114 | scan.global(options, symtab, layout, target, object, data_shndx, |
07f397ab | 115 | output_section, reloc, r_type, gsym); |
92e059d8 ILT |
116 | } |
117 | } | |
118 | } | |
119 | ||
120 | // This function implements the generic part of relocation processing. | |
6a74a719 ILT |
121 | // The template parameter Relocate must be a class type which provides |
122 | // a single function, relocate(), which implements the machine | |
123 | // specific part of a relocation. | |
61ba1cf9 ILT |
124 | |
125 | // SIZE is the ELF size: 32 or 64. BIG_ENDIAN is the endianness of | |
92e059d8 ILT |
126 | // the data. SH_TYPE is the section type: SHT_REL or SHT_RELA. |
127 | // RELOCATE implements operator() to do a relocation. | |
61ba1cf9 | 128 | |
92e059d8 | 129 | // PRELOCS points to the relocation data. RELOC_COUNT is the number |
730cdc88 ILT |
130 | // of relocs. OUTPUT_SECTION is the output section. |
131 | // NEEDS_SPECIAL_OFFSET_HANDLING is true if input offsets need to be | |
132 | // mapped to output offsets. | |
133 | ||
134 | // VIEW is the section data, VIEW_ADDRESS is its memory address, and | |
135 | // VIEW_SIZE is the size. These refer to the input section, unless | |
136 | // NEEDS_SPECIAL_OFFSET_HANDLING is true, in which case they refer to | |
137 | // the output section. | |
61ba1cf9 | 138 | |
ead1e424 ILT |
139 | template<int size, bool big_endian, typename Target_type, int sh_type, |
140 | typename Relocate> | |
61ba1cf9 ILT |
141 | inline void |
142 | relocate_section( | |
92e059d8 | 143 | const Relocate_info<size, big_endian>* relinfo, |
ead1e424 | 144 | Target_type* target, |
61ba1cf9 ILT |
145 | const unsigned char* prelocs, |
146 | size_t reloc_count, | |
730cdc88 ILT |
147 | Output_section* output_section, |
148 | bool needs_special_offset_handling, | |
61ba1cf9 ILT |
149 | unsigned char* view, |
150 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
fe8718a4 | 151 | section_size_type view_size) |
61ba1cf9 ILT |
152 | { |
153 | typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype; | |
154 | const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size; | |
155 | Relocate relocate; | |
156 | ||
730cdc88 ILT |
157 | Sized_relobj<size, big_endian>* object = relinfo->object; |
158 | unsigned int local_count = object->local_symbol_count(); | |
92e059d8 | 159 | |
61ba1cf9 ILT |
160 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) |
161 | { | |
162 | Reltype reloc(prelocs); | |
163 | ||
fe8718a4 ILT |
164 | section_offset_type offset = |
165 | convert_to_section_size_type(reloc.get_r_offset()); | |
61ba1cf9 | 166 | |
730cdc88 ILT |
167 | if (needs_special_offset_handling) |
168 | { | |
169 | offset = output_section->output_offset(relinfo->object, | |
170 | relinfo->data_shndx, | |
171 | offset); | |
172 | if (offset == -1) | |
173 | continue; | |
174 | } | |
175 | ||
61ba1cf9 ILT |
176 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); |
177 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
178 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
179 | ||
c06b7b0b | 180 | const Sized_symbol<size>* sym; |
61ba1cf9 | 181 | |
b8e6aad9 ILT |
182 | Symbol_value<size> symval; |
183 | const Symbol_value<size> *psymval; | |
61ba1cf9 ILT |
184 | if (r_sym < local_count) |
185 | { | |
186 | sym = NULL; | |
730cdc88 | 187 | psymval = object->local_symbol(r_sym); |
61ba1cf9 ILT |
188 | } |
189 | else | |
190 | { | |
730cdc88 | 191 | const Symbol* gsym = object->global_symbol(r_sym); |
a3ad94ed | 192 | gold_assert(gsym != NULL); |
61ba1cf9 | 193 | if (gsym->is_forwarder()) |
92e059d8 | 194 | gsym = relinfo->symtab->resolve_forwards(gsym); |
61ba1cf9 | 195 | |
c06b7b0b | 196 | sym = static_cast<const Sized_symbol<size>*>(gsym); |
b8e6aad9 ILT |
197 | if (sym->has_symtab_index()) |
198 | symval.set_output_symtab_index(sym->symtab_index()); | |
199 | else | |
200 | symval.set_no_output_symtab_entry(); | |
201 | symval.set_output_value(sym->value()); | |
202 | psymval = &symval; | |
ead1e424 | 203 | } |
61ba1cf9 | 204 | |
b8e6aad9 | 205 | if (!relocate.relocate(relinfo, target, i, reloc, r_type, sym, psymval, |
ead1e424 ILT |
206 | view + offset, view_address + offset, view_size)) |
207 | continue; | |
208 | ||
fe8718a4 | 209 | if (offset < 0 || static_cast<section_size_type>(offset) >= view_size) |
ead1e424 | 210 | { |
75f2446e ILT |
211 | gold_error_at_location(relinfo, i, offset, |
212 | _("reloc has bad offset %zu"), | |
213 | static_cast<size_t>(offset)); | |
214 | continue; | |
61ba1cf9 ILT |
215 | } |
216 | ||
ead1e424 ILT |
217 | if (sym != NULL |
218 | && sym->is_undefined() | |
436ca963 | 219 | && sym->binding() != elfcpp::STB_WEAK |
eb42429a ILT |
220 | && (!parameters->options().shared() // -shared |
221 | || parameters->options().defs())) // -z defs | |
75f2446e | 222 | gold_undefined_symbol(sym, relinfo, i, offset); |
f6ce93d6 ILT |
223 | |
224 | if (sym != NULL && sym->has_warning()) | |
75f2446e | 225 | relinfo->symtab->issue_warning(sym, relinfo, i, offset); |
61ba1cf9 ILT |
226 | } |
227 | } | |
228 | ||
6a74a719 ILT |
229 | // This class may be used as a typical class for the |
230 | // Scan_relocatable_reloc parameter to scan_relocatable_relocs. The | |
231 | // template parameter Classify_reloc must be a class type which | |
232 | // provides a function get_size_for_reloc which returns the number of | |
233 | // bytes to which a reloc applies. This class is intended to capture | |
234 | // the most typical target behaviour, while still permitting targets | |
235 | // to define their own independent class for Scan_relocatable_reloc. | |
236 | ||
237 | template<int sh_type, typename Classify_reloc> | |
238 | class Default_scan_relocatable_relocs | |
239 | { | |
240 | public: | |
241 | // Return the strategy to use for a local symbol which is not a | |
242 | // section symbol, given the relocation type. | |
243 | inline Relocatable_relocs::Reloc_strategy | |
244 | local_non_section_strategy(unsigned int, Relobj*) | |
245 | { return Relocatable_relocs::RELOC_COPY; } | |
246 | ||
247 | // Return the strategy to use for a local symbol which is a section | |
248 | // symbol, given the relocation type. | |
249 | inline Relocatable_relocs::Reloc_strategy | |
250 | local_section_strategy(unsigned int r_type, Relobj* object) | |
251 | { | |
252 | if (sh_type == elfcpp::SHT_RELA) | |
253 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; | |
254 | else | |
255 | { | |
256 | Classify_reloc classify; | |
257 | switch (classify.get_size_for_reloc(r_type, object)) | |
258 | { | |
259 | case 0: | |
7019cd25 | 260 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0; |
6a74a719 ILT |
261 | case 1: |
262 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_1; | |
263 | case 2: | |
264 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_2; | |
265 | case 4: | |
266 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_4; | |
267 | case 8: | |
268 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_8; | |
269 | default: | |
270 | gold_unreachable(); | |
271 | } | |
272 | } | |
273 | } | |
274 | ||
275 | // Return the strategy to use for a global symbol, given the | |
276 | // relocation type, the object, and the symbol index. | |
277 | inline Relocatable_relocs::Reloc_strategy | |
278 | global_strategy(unsigned int, Relobj*, unsigned int) | |
279 | { return Relocatable_relocs::RELOC_COPY; } | |
280 | }; | |
281 | ||
282 | // Scan relocs during a relocatable link. This is a default | |
283 | // definition which should work for most targets. | |
284 | // Scan_relocatable_reloc must name a class type which provides three | |
285 | // functions which return a Relocatable_relocs::Reloc_strategy code: | |
286 | // global_strategy, local_non_section_strategy, and | |
287 | // local_section_strategy. Most targets should be able to use | |
288 | // Default_scan_relocatable_relocs as this class. | |
289 | ||
7019cd25 | 290 | template<int size, bool big_endian, int sh_type, |
6a74a719 ILT |
291 | typename Scan_relocatable_reloc> |
292 | void | |
293 | scan_relocatable_relocs( | |
294 | const General_options&, | |
295 | Symbol_table*, | |
296 | Layout*, | |
297 | Sized_relobj<size, big_endian>* object, | |
298 | unsigned int data_shndx, | |
299 | const unsigned char* prelocs, | |
300 | size_t reloc_count, | |
301 | Output_section* output_section, | |
302 | bool needs_special_offset_handling, | |
303 | size_t local_symbol_count, | |
304 | const unsigned char* plocal_syms, | |
305 | Relocatable_relocs* rr) | |
306 | { | |
307 | typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype; | |
308 | const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size; | |
309 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
310 | Scan_relocatable_reloc scan; | |
311 | ||
312 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
313 | { | |
314 | Reltype reloc(prelocs); | |
315 | ||
316 | Relocatable_relocs::Reloc_strategy strategy; | |
317 | ||
318 | if (needs_special_offset_handling | |
319 | && !output_section->is_input_address_mapped(object, data_shndx, | |
320 | reloc.get_r_offset())) | |
321 | strategy = Relocatable_relocs::RELOC_DISCARD; | |
322 | else | |
323 | { | |
324 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = | |
325 | reloc.get_r_info(); | |
326 | const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
327 | const unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
328 | ||
329 | if (r_sym >= local_symbol_count) | |
330 | strategy = scan.global_strategy(r_type, object, r_sym); | |
331 | else | |
332 | { | |
333 | gold_assert(plocal_syms != NULL); | |
334 | typename elfcpp::Sym<size, big_endian> lsym(plocal_syms | |
335 | + r_sym * sym_size); | |
336 | const unsigned int shndx = lsym.get_st_shndx(); | |
337 | if (shndx < elfcpp::SHN_LORESERVE | |
338 | && shndx != elfcpp::SHN_UNDEF | |
339 | && !object->is_section_included(lsym.get_st_shndx())) | |
340 | { | |
341 | // RELOC is a relocation against a local symbol | |
342 | // defined in a section we are discarding. Discard | |
343 | // the reloc. FIXME: Should we issue a warning? | |
344 | strategy = Relocatable_relocs::RELOC_DISCARD; | |
345 | } | |
346 | else if (lsym.get_st_type() != elfcpp::STT_SECTION) | |
347 | strategy = scan.local_non_section_strategy(r_type, object); | |
348 | else | |
349 | { | |
350 | strategy = scan.local_section_strategy(r_type, object); | |
351 | if (strategy != Relocatable_relocs::RELOC_DISCARD) | |
352 | { | |
353 | section_offset_type dummy; | |
354 | Output_section* os = object->output_section(shndx, | |
355 | &dummy); | |
356 | os->set_needs_symtab_index(); | |
357 | } | |
358 | } | |
359 | } | |
360 | } | |
361 | ||
362 | rr->set_next_reloc_strategy(strategy); | |
363 | } | |
364 | } | |
365 | ||
366 | // Relocate relocs during a relocatable link. This is a default | |
367 | // definition which should work for most targets. | |
368 | ||
7019cd25 | 369 | template<int size, bool big_endian, int sh_type> |
6a74a719 ILT |
370 | void |
371 | relocate_for_relocatable( | |
372 | const Relocate_info<size, big_endian>* relinfo, | |
373 | const unsigned char* prelocs, | |
374 | size_t reloc_count, | |
375 | Output_section* output_section, | |
376 | off_t offset_in_output_section, | |
377 | const Relocatable_relocs* rr, | |
378 | unsigned char* view, | |
6be6f3bd | 379 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, |
6a74a719 ILT |
380 | section_size_type, |
381 | unsigned char* reloc_view, | |
382 | section_size_type reloc_view_size) | |
383 | { | |
384 | typedef typename Reloc_types<sh_type, size, big_endian>::Reloc Reltype; | |
385 | typedef typename Reloc_types<sh_type, size, big_endian>::Reloc_write | |
386 | Reltype_write; | |
387 | const int reloc_size = Reloc_types<sh_type, size, big_endian>::reloc_size; | |
388 | ||
389 | Sized_relobj<size, big_endian>* const object = relinfo->object; | |
390 | const unsigned int local_count = object->local_symbol_count(); | |
391 | ||
392 | unsigned char* pwrite = reloc_view; | |
393 | ||
394 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
395 | { | |
396 | Relocatable_relocs::Reloc_strategy strategy = rr->strategy(i); | |
397 | if (strategy == Relocatable_relocs::RELOC_DISCARD) | |
398 | continue; | |
399 | ||
400 | Reltype reloc(prelocs); | |
401 | Reltype_write reloc_write(pwrite); | |
402 | ||
403 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); | |
404 | const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
405 | const unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
406 | ||
407 | // Get the new symbol index. | |
408 | ||
409 | unsigned int new_symndx; | |
410 | if (r_sym < local_count) | |
411 | { | |
412 | switch (strategy) | |
413 | { | |
414 | case Relocatable_relocs::RELOC_COPY: | |
415 | new_symndx = object->symtab_index(r_sym); | |
416 | gold_assert(new_symndx != -1U); | |
417 | break; | |
418 | ||
419 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
7019cd25 | 420 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0: |
6a74a719 ILT |
421 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_1: |
422 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_2: | |
423 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_4: | |
424 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_8: | |
425 | { | |
426 | // We are adjusting a section symbol. We need to find | |
427 | // the symbol table index of the section symbol for | |
428 | // the output section corresponding to input section | |
429 | // in which this symbol is defined. | |
430 | gold_assert(r_sym < local_count); | |
431 | unsigned int shndx = object->local_symbol_input_shndx(r_sym); | |
432 | section_offset_type dummy; | |
433 | Output_section* os = object->output_section(shndx, &dummy); | |
434 | gold_assert(os != NULL); | |
435 | gold_assert(os->needs_symtab_index()); | |
436 | new_symndx = os->symtab_index(); | |
437 | } | |
438 | break; | |
439 | ||
440 | default: | |
441 | gold_unreachable(); | |
442 | } | |
443 | } | |
444 | else | |
445 | { | |
446 | const Symbol* gsym = object->global_symbol(r_sym); | |
447 | gold_assert(gsym != NULL); | |
448 | if (gsym->is_forwarder()) | |
449 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
450 | ||
451 | gold_assert(gsym->has_symtab_index()); | |
452 | new_symndx = gsym->symtab_index(); | |
453 | } | |
454 | ||
455 | // Get the new offset--the location in the output section where | |
456 | // this relocation should be applied. | |
457 | ||
458 | off_t offset = reloc.get_r_offset(); | |
459 | off_t new_offset; | |
460 | if (offset_in_output_section != -1) | |
461 | new_offset = offset + offset_in_output_section; | |
462 | else | |
463 | { | |
464 | new_offset = output_section->output_offset(object, | |
465 | relinfo->data_shndx, | |
466 | offset); | |
467 | gold_assert(new_offset != -1); | |
468 | } | |
469 | ||
6be6f3bd ILT |
470 | // In an object file, r_offset is an offset within the section. |
471 | // In an executable or dynamic object, generated by | |
472 | // --emit-relocs, r_offset is an absolute address. | |
473 | if (!parameters->options().relocatable()) | |
474 | new_offset += view_address; | |
475 | ||
6a74a719 ILT |
476 | reloc_write.put_r_offset(new_offset); |
477 | reloc_write.put_r_info(elfcpp::elf_r_info<size>(new_symndx, r_type)); | |
478 | ||
479 | // Handle the reloc addend based on the strategy. | |
480 | ||
481 | if (strategy == Relocatable_relocs::RELOC_COPY) | |
482 | { | |
483 | if (sh_type == elfcpp::SHT_RELA) | |
484 | Reloc_types<sh_type, size, big_endian>:: | |
485 | copy_reloc_addend(&reloc_write, | |
486 | &reloc); | |
487 | } | |
488 | else | |
489 | { | |
490 | // The relocation uses a section symbol in the input file. | |
491 | // We are adjusting it to use a section symbol in the output | |
492 | // file. The input section symbol refers to some address in | |
493 | // the input section. We need the relocation in the output | |
494 | // file to refer to that same address. This adjustment to | |
495 | // the addend is the same calculation we use for a simple | |
496 | // absolute relocation for the input section symbol. | |
497 | ||
498 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); | |
499 | ||
500 | unsigned char* padd = view + offset; | |
501 | switch (strategy) | |
502 | { | |
503 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA: | |
504 | { | |
505 | typename elfcpp::Elf_types<size>::Elf_Swxword addend; | |
506 | addend = Reloc_types<sh_type, size, big_endian>:: | |
507 | get_reloc_addend(&reloc); | |
508 | addend = psymval->value(object, addend); | |
509 | Reloc_types<sh_type, size, big_endian>:: | |
510 | set_reloc_addend(&reloc_write, addend); | |
511 | } | |
512 | break; | |
513 | ||
7019cd25 ILT |
514 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_0: |
515 | break; | |
516 | ||
6a74a719 ILT |
517 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_1: |
518 | Relocate_functions<size, big_endian>::rel8(padd, object, | |
519 | psymval); | |
520 | break; | |
521 | ||
522 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_2: | |
523 | Relocate_functions<size, big_endian>::rel16(padd, object, | |
524 | psymval); | |
525 | break; | |
526 | ||
527 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_4: | |
528 | Relocate_functions<size, big_endian>::rel32(padd, object, | |
529 | psymval); | |
530 | break; | |
531 | ||
532 | case Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_8: | |
533 | Relocate_functions<size, big_endian>::rel64(padd, object, | |
534 | psymval); | |
535 | break; | |
536 | ||
537 | default: | |
538 | gold_unreachable(); | |
539 | } | |
540 | } | |
541 | ||
542 | pwrite += reloc_size; | |
543 | } | |
544 | ||
545 | gold_assert(static_cast<section_size_type>(pwrite - reloc_view) | |
546 | == reloc_view_size); | |
547 | } | |
548 | ||
61ba1cf9 ILT |
549 | } // End namespace gold. |
550 | ||
551 | #endif // !defined(GOLD_TARGET_RELOC_H) |