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14bfc3f5 | 1 | // target.h -- target support for gold -*- C++ -*- |
bae7f79e | 2 | |
6d03d481 | 3 | // Copyright 2006, 2007, 2008, 2009 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 | ||
bae7f79e ILT |
23 | // The abstract class Target is the interface for target specific |
24 | // support. It defines abstract methods which each target must | |
25 | // implement. Typically there will be one target per processor, but | |
26 | // in some cases it may be necessary to have subclasses. | |
27 | ||
28 | // For speed and consistency we want to use inline functions to handle | |
29 | // relocation processing. So besides implementations of the abstract | |
30 | // methods, each target is expected to define a template | |
31 | // specialization of the relocation functions. | |
32 | ||
33 | #ifndef GOLD_TARGET_H | |
34 | #define GOLD_TARGET_H | |
35 | ||
14bfc3f5 | 36 | #include "elfcpp.h" |
8851ecca | 37 | #include "options.h" |
cd72c291 | 38 | #include "parameters.h" |
20e6d0d6 | 39 | #include "debug.h" |
14bfc3f5 | 40 | |
bae7f79e ILT |
41 | namespace gold |
42 | { | |
43 | ||
14bfc3f5 | 44 | class Object; |
364c7fa5 | 45 | class Relobj; |
61ba1cf9 | 46 | template<int size, bool big_endian> |
f6ce93d6 | 47 | class Sized_relobj; |
6a74a719 | 48 | class Relocatable_relocs; |
92e059d8 | 49 | template<int size, bool big_endian> |
730cdc88 | 50 | class Relocate_info; |
364c7fa5 | 51 | class Reloc_symbol_changes; |
f6ce93d6 ILT |
52 | class Symbol; |
53 | template<int size> | |
54 | class Sized_symbol; | |
55 | class Symbol_table; | |
730cdc88 | 56 | class Output_section; |
d5b40221 | 57 | class Input_objects; |
14bfc3f5 ILT |
58 | |
59 | // The abstract class for target specific handling. | |
60 | ||
bae7f79e ILT |
61 | class Target |
62 | { | |
63 | public: | |
14bfc3f5 ILT |
64 | virtual ~Target() |
65 | { } | |
66 | ||
67 | // Return the bit size that this target implements. This should | |
68 | // return 32 or 64. | |
69 | int | |
70 | get_size() const | |
75f65a3e | 71 | { return this->pti_->size; } |
14bfc3f5 ILT |
72 | |
73 | // Return whether this target is big-endian. | |
74 | bool | |
75 | is_big_endian() const | |
75f65a3e | 76 | { return this->pti_->is_big_endian; } |
14bfc3f5 | 77 | |
61ba1cf9 ILT |
78 | // Machine code to store in e_machine field of ELF header. |
79 | elfcpp::EM | |
80 | machine_code() const | |
81 | { return this->pti_->machine_code; } | |
82 | ||
d5b40221 DK |
83 | // Processor specific flags to store in e_flags field of ELF header. |
84 | elfcpp::Elf_Word | |
85 | processor_specific_flags() const | |
86 | { return this->processor_specific_flags_; } | |
87 | ||
88 | // Whether processor specific flags are set at least once. | |
89 | bool | |
90 | are_processor_specific_flags_set() const | |
91 | { return this->are_processor_specific_flags_set_; } | |
92 | ||
14bfc3f5 ILT |
93 | // Whether this target has a specific make_symbol function. |
94 | bool | |
95 | has_make_symbol() const | |
75f65a3e | 96 | { return this->pti_->has_make_symbol; } |
14bfc3f5 ILT |
97 | |
98 | // Whether this target has a specific resolve function. | |
99 | bool | |
100 | has_resolve() const | |
75f65a3e ILT |
101 | { return this->pti_->has_resolve; } |
102 | ||
c51e6221 ILT |
103 | // Whether this target has a specific code fill function. |
104 | bool | |
105 | has_code_fill() const | |
106 | { return this->pti_->has_code_fill; } | |
107 | ||
dbe717ef ILT |
108 | // Return the default name of the dynamic linker. |
109 | const char* | |
110 | dynamic_linker() const | |
111 | { return this->pti_->dynamic_linker; } | |
112 | ||
75f65a3e ILT |
113 | // Return the default address to use for the text segment. |
114 | uint64_t | |
0c5e9c22 ILT |
115 | default_text_segment_address() const |
116 | { return this->pti_->default_text_segment_address; } | |
75f65a3e ILT |
117 | |
118 | // Return the ABI specified page size. | |
119 | uint64_t | |
120 | abi_pagesize() const | |
cd72c291 | 121 | { |
8851ecca ILT |
122 | if (parameters->options().max_page_size() > 0) |
123 | return parameters->options().max_page_size(); | |
cd72c291 ILT |
124 | else |
125 | return this->pti_->abi_pagesize; | |
126 | } | |
75f65a3e ILT |
127 | |
128 | // Return the common page size used on actual systems. | |
129 | uint64_t | |
130 | common_pagesize() const | |
cd72c291 | 131 | { |
8851ecca ILT |
132 | if (parameters->options().common_page_size() > 0) |
133 | return std::min(parameters->options().common_page_size(), | |
cd72c291 ILT |
134 | this->abi_pagesize()); |
135 | else | |
136 | return std::min(this->pti_->common_pagesize, | |
137 | this->abi_pagesize()); | |
138 | } | |
14bfc3f5 | 139 | |
35cdfc9a ILT |
140 | // If we see some object files with .note.GNU-stack sections, and |
141 | // some objects files without them, this returns whether we should | |
142 | // consider the object files without them to imply that the stack | |
143 | // should be executable. | |
144 | bool | |
145 | is_default_stack_executable() const | |
146 | { return this->pti_->is_default_stack_executable; } | |
147 | ||
0864d551 ILT |
148 | // Return a character which may appear as a prefix for a wrap |
149 | // symbol. If this character appears, we strip it when checking for | |
150 | // wrapping and add it back when forming the final symbol name. | |
151 | // This should be '\0' if not special prefix is required, which is | |
152 | // the normal case. | |
153 | char | |
154 | wrap_char() const | |
155 | { return this->pti_->wrap_char; } | |
156 | ||
8a5e3e08 ILT |
157 | // Return the special section index which indicates a small common |
158 | // symbol. This will return SHN_UNDEF if there are no small common | |
159 | // symbols. | |
160 | elfcpp::Elf_Half | |
161 | small_common_shndx() const | |
162 | { return this->pti_->small_common_shndx; } | |
163 | ||
164 | // Return values to add to the section flags for the section holding | |
165 | // small common symbols. | |
166 | elfcpp::Elf_Xword | |
167 | small_common_section_flags() const | |
168 | { | |
169 | gold_assert(this->pti_->small_common_shndx != elfcpp::SHN_UNDEF); | |
170 | return this->pti_->small_common_section_flags; | |
171 | } | |
172 | ||
173 | // Return the special section index which indicates a large common | |
174 | // symbol. This will return SHN_UNDEF if there are no large common | |
175 | // symbols. | |
176 | elfcpp::Elf_Half | |
177 | large_common_shndx() const | |
178 | { return this->pti_->large_common_shndx; } | |
179 | ||
180 | // Return values to add to the section flags for the section holding | |
181 | // large common symbols. | |
182 | elfcpp::Elf_Xword | |
183 | large_common_section_flags() const | |
184 | { | |
185 | gold_assert(this->pti_->large_common_shndx != elfcpp::SHN_UNDEF); | |
186 | return this->pti_->large_common_section_flags; | |
187 | } | |
188 | ||
189 | // This hook is called when an output section is created. | |
190 | void | |
191 | new_output_section(Output_section* os) const | |
192 | { this->do_new_output_section(os); } | |
193 | ||
5a6f7e2d ILT |
194 | // This is called to tell the target to complete any sections it is |
195 | // handling. After this all sections must have their final size. | |
196 | void | |
d5b40221 DK |
197 | finalize_sections(Layout* layout, const Input_objects* input_objects) |
198 | { return this->do_finalize_sections(layout, input_objects); } | |
5a6f7e2d | 199 | |
ab5c9e90 ILT |
200 | // Return the value to use for a global symbol which needs a special |
201 | // value in the dynamic symbol table. This will only be called if | |
202 | // the backend first calls symbol->set_needs_dynsym_value(). | |
203 | uint64_t | |
204 | dynsym_value(const Symbol* sym) const | |
205 | { return this->do_dynsym_value(sym); } | |
206 | ||
c51e6221 ILT |
207 | // Return a string to use to fill out a code section. This is |
208 | // basically one or more NOPS which must fill out the specified | |
209 | // length in bytes. | |
210 | std::string | |
8851ecca | 211 | code_fill(section_size_type length) const |
c51e6221 ILT |
212 | { return this->do_code_fill(length); } |
213 | ||
9a2d6984 ILT |
214 | // Return whether SYM is known to be defined by the ABI. This is |
215 | // used to avoid inappropriate warnings about undefined symbols. | |
216 | bool | |
9c2d0ef9 | 217 | is_defined_by_abi(const Symbol* sym) const |
9a2d6984 ILT |
218 | { return this->do_is_defined_by_abi(sym); } |
219 | ||
36959681 ILT |
220 | // Adjust the output file header before it is written out. VIEW |
221 | // points to the header in external form. LEN is the length. | |
222 | void | |
223 | adjust_elf_header(unsigned char* view, int len) const | |
224 | { return this->do_adjust_elf_header(view, len); } | |
225 | ||
bb04269c DK |
226 | // Return whether NAME is a local label name. This is used to implement the |
227 | // --discard-locals options. | |
228 | bool | |
229 | is_local_label_name(const char* name) const | |
230 | { return this->do_is_local_label_name(name); } | |
231 | ||
364c7fa5 ILT |
232 | // A function starts at OFFSET in section SHNDX in OBJECT. That |
233 | // function was compiled with -fsplit-stack, but it refers to a | |
234 | // function which was compiled without -fsplit-stack. VIEW is a | |
235 | // modifiable view of the section; VIEW_SIZE is the size of the | |
236 | // view. The target has to adjust the function so that it allocates | |
237 | // enough stack. | |
238 | void | |
239 | calls_non_split(Relobj* object, unsigned int shndx, | |
240 | section_offset_type fnoffset, section_size_type fnsize, | |
241 | unsigned char* view, section_size_type view_size, | |
242 | std::string* from, std::string* to) const | |
243 | { | |
244 | this->do_calls_non_split(object, shndx, fnoffset, fnsize, view, view_size, | |
245 | from, to); | |
246 | } | |
247 | ||
f733487b DK |
248 | // Make an ELF object. |
249 | template<int size, bool big_endian> | |
250 | Object* | |
251 | make_elf_object(const std::string& name, Input_file* input_file, | |
252 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
253 | { return this->do_make_elf_object(name, input_file, offset, ehdr); } | |
254 | ||
c0a62865 DK |
255 | // Make an output section. |
256 | Output_section* | |
257 | make_output_section(const char* name, elfcpp::Elf_Word type, | |
258 | elfcpp::Elf_Xword flags) | |
259 | { return this->do_make_output_section(name, type, flags); } | |
260 | ||
20e6d0d6 DK |
261 | // Return true if target wants to perform relaxation. |
262 | bool | |
263 | may_relax() const | |
264 | { | |
265 | // Run the dummy relaxation pass twice if relaxation debugging is enabled. | |
266 | if (is_debugging_enabled(DEBUG_RELAXATION)) | |
267 | return true; | |
268 | ||
269 | return this->do_may_relax(); | |
270 | } | |
271 | ||
272 | // Perform a relaxation pass. Return true if layout may be changed. | |
273 | bool | |
c0a62865 DK |
274 | relax(int pass, const Input_objects* input_objects, Symbol_table* symtab, |
275 | Layout* layout) | |
20e6d0d6 DK |
276 | { |
277 | // Run the dummy relaxation pass twice if relaxation debugging is enabled. | |
278 | if (is_debugging_enabled(DEBUG_RELAXATION)) | |
279 | return pass < 2; | |
280 | ||
c0a62865 DK |
281 | return this->do_relax(pass, input_objects, symtab, layout); |
282 | } | |
20e6d0d6 | 283 | |
14bfc3f5 | 284 | protected: |
75f65a3e ILT |
285 | // This struct holds the constant information for a child class. We |
286 | // use a struct to avoid the overhead of virtual function calls for | |
287 | // simple information. | |
288 | struct Target_info | |
289 | { | |
290 | // Address size (32 or 64). | |
291 | int size; | |
292 | // Whether the target is big endian. | |
293 | bool is_big_endian; | |
61ba1cf9 ILT |
294 | // The code to store in the e_machine field of the ELF header. |
295 | elfcpp::EM machine_code; | |
75f65a3e ILT |
296 | // Whether this target has a specific make_symbol function. |
297 | bool has_make_symbol; | |
298 | // Whether this target has a specific resolve function. | |
299 | bool has_resolve; | |
c51e6221 ILT |
300 | // Whether this target has a specific code fill function. |
301 | bool has_code_fill; | |
35cdfc9a ILT |
302 | // Whether an object file with no .note.GNU-stack sections implies |
303 | // that the stack should be executable. | |
304 | bool is_default_stack_executable; | |
0864d551 ILT |
305 | // Prefix character to strip when checking for wrapping. |
306 | char wrap_char; | |
dbe717ef ILT |
307 | // The default dynamic linker name. |
308 | const char* dynamic_linker; | |
75f65a3e | 309 | // The default text segment address. |
0c5e9c22 | 310 | uint64_t default_text_segment_address; |
75f65a3e ILT |
311 | // The ABI specified page size. |
312 | uint64_t abi_pagesize; | |
313 | // The common page size used by actual implementations. | |
314 | uint64_t common_pagesize; | |
8a5e3e08 ILT |
315 | // The special section index for small common symbols; SHN_UNDEF |
316 | // if none. | |
317 | elfcpp::Elf_Half small_common_shndx; | |
318 | // The special section index for large common symbols; SHN_UNDEF | |
319 | // if none. | |
320 | elfcpp::Elf_Half large_common_shndx; | |
321 | // Section flags for small common section. | |
322 | elfcpp::Elf_Xword small_common_section_flags; | |
323 | // Section flags for large common section. | |
324 | elfcpp::Elf_Xword large_common_section_flags; | |
75f65a3e ILT |
325 | }; |
326 | ||
327 | Target(const Target_info* pti) | |
d5b40221 DK |
328 | : pti_(pti), processor_specific_flags_(0), |
329 | are_processor_specific_flags_set_(false) | |
14bfc3f5 ILT |
330 | { } |
331 | ||
8a5e3e08 ILT |
332 | // Virtual function which may be implemented by the child class. |
333 | virtual void | |
334 | do_new_output_section(Output_section*) const | |
335 | { } | |
336 | ||
5a6f7e2d ILT |
337 | // Virtual function which may be implemented by the child class. |
338 | virtual void | |
d5b40221 | 339 | do_finalize_sections(Layout*, const Input_objects*) |
5a6f7e2d ILT |
340 | { } |
341 | ||
ab5c9e90 ILT |
342 | // Virtual function which may be implemented by the child class. |
343 | virtual uint64_t | |
344 | do_dynsym_value(const Symbol*) const | |
345 | { gold_unreachable(); } | |
346 | ||
c51e6221 ILT |
347 | // Virtual function which must be implemented by the child class if |
348 | // needed. | |
349 | virtual std::string | |
8851ecca | 350 | do_code_fill(section_size_type) const |
c51e6221 ILT |
351 | { gold_unreachable(); } |
352 | ||
9a2d6984 ILT |
353 | // Virtual function which may be implemented by the child class. |
354 | virtual bool | |
9c2d0ef9 | 355 | do_is_defined_by_abi(const Symbol*) const |
9a2d6984 ILT |
356 | { return false; } |
357 | ||
36959681 ILT |
358 | // Adjust the output file header before it is written out. VIEW |
359 | // points to the header in external form. LEN is the length, and | |
360 | // will be one of the values of elfcpp::Elf_sizes<size>::ehdr_size. | |
361 | // By default, we do nothing. | |
362 | virtual void | |
363 | do_adjust_elf_header(unsigned char*, int) const | |
364 | { } | |
365 | ||
bb04269c DK |
366 | // Virtual function which may be overriden by the child class. |
367 | virtual bool | |
368 | do_is_local_label_name(const char*) const; | |
369 | ||
364c7fa5 ILT |
370 | // Virtual function which may be overridden by the child class. |
371 | virtual void | |
372 | do_calls_non_split(Relobj* object, unsigned int, section_offset_type, | |
373 | section_size_type, unsigned char*, section_size_type, | |
374 | std::string*, std::string*) const; | |
375 | ||
f733487b DK |
376 | // make_elf_object hooks. There are four versions of these for |
377 | // different address sizes and endianities. | |
364c7fa5 | 378 | |
d5b40221 DK |
379 | // Set processor specific flags. |
380 | void | |
381 | set_processor_specific_flags(elfcpp::Elf_Word flags) | |
382 | { | |
383 | this->processor_specific_flags_ = flags; | |
384 | this->are_processor_specific_flags_set_ = true; | |
385 | } | |
386 | ||
f733487b DK |
387 | #ifdef HAVE_TARGET_32_LITTLE |
388 | // Virtual functions which may be overriden by the child class. | |
389 | virtual Object* | |
390 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
391 | const elfcpp::Ehdr<32, false>&); | |
392 | #endif | |
393 | ||
394 | #ifdef HAVE_TARGET_32_BIG | |
395 | // Virtual functions which may be overriden by the child class. | |
396 | virtual Object* | |
397 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
398 | const elfcpp::Ehdr<32, true>&); | |
399 | #endif | |
400 | ||
401 | #ifdef HAVE_TARGET_64_LITTLE | |
402 | // Virtual functions which may be overriden by the child class. | |
403 | virtual Object* | |
404 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
405 | const elfcpp::Ehdr<64, false>& ehdr); | |
406 | #endif | |
407 | ||
408 | #ifdef HAVE_TARGET_64_BIG | |
409 | // Virtual functions which may be overriden by the child class. | |
410 | virtual Object* | |
411 | do_make_elf_object(const std::string& name, Input_file* input_file, | |
412 | off_t offset, const elfcpp::Ehdr<64, true>& ehdr); | |
413 | #endif | |
414 | ||
c0a62865 DK |
415 | // Virtual functions which may be overriden by the child class. |
416 | virtual Output_section* | |
417 | do_make_output_section(const char* name, elfcpp::Elf_Word type, | |
418 | elfcpp::Elf_Xword flags); | |
419 | ||
20e6d0d6 DK |
420 | // Virtual function which may be overriden by the child class. |
421 | virtual bool | |
422 | do_may_relax() const | |
423 | { return parameters->options().relax(); } | |
424 | ||
425 | // Virtual function which may be overriden by the child class. | |
426 | virtual bool | |
c0a62865 | 427 | do_relax(int, const Input_objects*, Symbol_table*, Layout*) |
20e6d0d6 DK |
428 | { return false; } |
429 | ||
364c7fa5 ILT |
430 | // A function for targets to call. Return whether BYTES/LEN matches |
431 | // VIEW/VIEW_SIZE at OFFSET. | |
432 | bool | |
433 | match_view(const unsigned char* view, section_size_type view_size, | |
434 | section_offset_type offset, const char* bytes, size_t len) const; | |
435 | ||
436 | // Set the contents of a VIEW/VIEW_SIZE to nops starting at OFFSET | |
437 | // for LEN bytes. | |
438 | void | |
439 | set_view_to_nop(unsigned char* view, section_size_type view_size, | |
440 | section_offset_type offset, size_t len) const; | |
441 | ||
14bfc3f5 | 442 | private: |
f733487b DK |
443 | // The implementations of the four do_make_elf_object virtual functions are |
444 | // almost identical except for their sizes and endianity. We use a template. | |
445 | // for their implementations. | |
446 | template<int size, bool big_endian> | |
447 | inline Object* | |
448 | do_make_elf_object_implementation(const std::string&, Input_file*, off_t, | |
449 | const elfcpp::Ehdr<size, big_endian>&); | |
450 | ||
14bfc3f5 ILT |
451 | Target(const Target&); |
452 | Target& operator=(const Target&); | |
453 | ||
75f65a3e ILT |
454 | // The target information. |
455 | const Target_info* pti_; | |
d5b40221 DK |
456 | // Processor-specific flags. |
457 | elfcpp::Elf_Word processor_specific_flags_; | |
458 | // Whether the processor-specific flags are set at least once. | |
459 | bool are_processor_specific_flags_set_; | |
bae7f79e ILT |
460 | }; |
461 | ||
14bfc3f5 ILT |
462 | // The abstract class for a specific size and endianness of target. |
463 | // Each actual target implementation class should derive from an | |
464 | // instantiation of Sized_target. | |
465 | ||
466 | template<int size, bool big_endian> | |
467 | class Sized_target : public Target | |
468 | { | |
469 | public: | |
470 | // Make a new symbol table entry for the target. This should be | |
471 | // overridden by a target which needs additional information in the | |
472 | // symbol table. This will only be called if has_make_symbol() | |
473 | // returns true. | |
474 | virtual Sized_symbol<size>* | |
14b31740 | 475 | make_symbol() const |
a3ad94ed | 476 | { gold_unreachable(); } |
14bfc3f5 ILT |
477 | |
478 | // Resolve a symbol for the target. This should be overridden by a | |
479 | // target which needs to take special action. TO is the | |
480 | // pre-existing symbol. SYM is the new symbol, seen in OBJECT. | |
14b31740 ILT |
481 | // VERSION is the version of SYM. This will only be called if |
482 | // has_resolve() returns true. | |
14bfc3f5 | 483 | virtual void |
14b31740 ILT |
484 | resolve(Symbol*, const elfcpp::Sym<size, big_endian>&, Object*, |
485 | const char*) | |
a3ad94ed | 486 | { gold_unreachable(); } |
14bfc3f5 | 487 | |
6d03d481 ST |
488 | // Process the relocs for a section, and record information of the |
489 | // mapping from source to destination sections. This mapping is later | |
490 | // used to determine unreferenced garbage sections. This procedure is | |
491 | // only called during garbage collection. | |
492 | virtual void | |
ad0f2072 ILT |
493 | gc_process_relocs(Symbol_table* symtab, |
494 | Layout* layout, | |
495 | Sized_relobj<size, big_endian>* object, | |
496 | unsigned int data_shndx, | |
497 | unsigned int sh_type, | |
498 | const unsigned char* prelocs, | |
499 | size_t reloc_count, | |
500 | Output_section* output_section, | |
501 | bool needs_special_offset_handling, | |
502 | size_t local_symbol_count, | |
503 | const unsigned char* plocal_symbols) = 0; | |
6d03d481 | 504 | |
92e059d8 | 505 | // Scan the relocs for a section, and record any information |
ad0f2072 ILT |
506 | // required for the symbol. SYMTAB is the symbol table. OBJECT is |
507 | // the object in which the section appears. DATA_SHNDX is the | |
508 | // section index that these relocs apply to. SH_TYPE is the type of | |
509 | // the relocation section, SHT_REL or SHT_RELA. PRELOCS points to | |
510 | // the relocation data. RELOC_COUNT is the number of relocs. | |
511 | // LOCAL_SYMBOL_COUNT is the number of local symbols. | |
512 | // OUTPUT_SECTION is the output section. | |
730cdc88 ILT |
513 | // NEEDS_SPECIAL_OFFSET_HANDLING is true if offsets to the output |
514 | // sections are not mapped as usual. PLOCAL_SYMBOLS points to the | |
515 | // local symbol data from OBJECT. GLOBAL_SYMBOLS is the array of | |
516 | // pointers to the global symbol table from OBJECT. | |
61ba1cf9 | 517 | virtual void |
ad0f2072 | 518 | scan_relocs(Symbol_table* symtab, |
ead1e424 | 519 | Layout* layout, |
f6ce93d6 | 520 | Sized_relobj<size, big_endian>* object, |
a3ad94ed | 521 | unsigned int data_shndx, |
92e059d8 ILT |
522 | unsigned int sh_type, |
523 | const unsigned char* prelocs, | |
524 | size_t reloc_count, | |
730cdc88 ILT |
525 | Output_section* output_section, |
526 | bool needs_special_offset_handling, | |
92e059d8 | 527 | size_t local_symbol_count, |
730cdc88 | 528 | const unsigned char* plocal_symbols) = 0; |
92e059d8 ILT |
529 | |
530 | // Relocate section data. SH_TYPE is the type of the relocation | |
531 | // section, SHT_REL or SHT_RELA. PRELOCS points to the relocation | |
730cdc88 ILT |
532 | // information. RELOC_COUNT is the number of relocs. |
533 | // OUTPUT_SECTION is the output section. | |
534 | // NEEDS_SPECIAL_OFFSET_HANDLING is true if offsets must be mapped | |
535 | // to correspond to the output section. VIEW is a view into the | |
536 | // output file holding the section contents, VIEW_ADDRESS is the | |
537 | // virtual address of the view, and VIEW_SIZE is the size of the | |
538 | // view. If NEEDS_SPECIAL_OFFSET_HANDLING is true, the VIEW_xx | |
539 | // parameters refer to the complete output section data, not just | |
540 | // the input section data. | |
92e059d8 ILT |
541 | virtual void |
542 | relocate_section(const Relocate_info<size, big_endian>*, | |
543 | unsigned int sh_type, | |
544 | const unsigned char* prelocs, | |
545 | size_t reloc_count, | |
730cdc88 ILT |
546 | Output_section* output_section, |
547 | bool needs_special_offset_handling, | |
92e059d8 ILT |
548 | unsigned char* view, |
549 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
364c7fa5 ILT |
550 | section_size_type view_size, |
551 | const Reloc_symbol_changes*) = 0; | |
61ba1cf9 | 552 | |
6a74a719 ILT |
553 | // Scan the relocs during a relocatable link. The parameters are |
554 | // like scan_relocs, with an additional Relocatable_relocs | |
555 | // parameter, used to record the disposition of the relocs. | |
556 | virtual void | |
ad0f2072 | 557 | scan_relocatable_relocs(Symbol_table* symtab, |
6a74a719 ILT |
558 | Layout* layout, |
559 | Sized_relobj<size, big_endian>* object, | |
560 | unsigned int data_shndx, | |
561 | unsigned int sh_type, | |
562 | const unsigned char* prelocs, | |
563 | size_t reloc_count, | |
564 | Output_section* output_section, | |
565 | bool needs_special_offset_handling, | |
566 | size_t local_symbol_count, | |
567 | const unsigned char* plocal_symbols, | |
568 | Relocatable_relocs*) = 0; | |
569 | ||
570 | // Relocate a section during a relocatable link. The parameters are | |
571 | // like relocate_section, with additional parameters for the view of | |
572 | // the output reloc section. | |
573 | virtual void | |
574 | relocate_for_relocatable(const Relocate_info<size, big_endian>*, | |
575 | unsigned int sh_type, | |
576 | const unsigned char* prelocs, | |
577 | size_t reloc_count, | |
578 | Output_section* output_section, | |
579 | off_t offset_in_output_section, | |
580 | const Relocatable_relocs*, | |
581 | unsigned char* view, | |
582 | typename elfcpp::Elf_types<size>::Elf_Addr | |
583 | view_address, | |
584 | section_size_type view_size, | |
585 | unsigned char* reloc_view, | |
586 | section_size_type reloc_view_size) = 0; | |
587 | ||
14bfc3f5 | 588 | protected: |
75f65a3e ILT |
589 | Sized_target(const Target::Target_info* pti) |
590 | : Target(pti) | |
591 | { | |
a3ad94ed ILT |
592 | gold_assert(pti->size == size); |
593 | gold_assert(pti->is_big_endian ? big_endian : !big_endian); | |
75f65a3e | 594 | } |
14bfc3f5 | 595 | }; |
bae7f79e ILT |
596 | |
597 | } // End namespace gold. | |
598 | ||
599 | #endif // !defined(GOLD_TARGET_H) |