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9810d34d SS |
1 | // mips.cc -- mips target support for gold. |
2 | ||
6f2750fe | 3 | // Copyright (C) 2011-2016 Free Software Foundation, Inc. |
9810d34d SS |
4 | // Written by Sasa Stankovic <sasa.stankovic@imgtec.com> |
5 | // and Aleksandar Simeonov <aleksandar.simeonov@rt-rk.com>. | |
6 | // This file contains borrowed and adapted code from bfd/elfxx-mips.c. | |
7 | ||
8 | // This file is part of gold. | |
9 | ||
10 | // This program is free software; you can redistribute it and/or modify | |
11 | // it under the terms of the GNU General Public License as published by | |
12 | // the Free Software Foundation; either version 3 of the License, or | |
13 | // (at your option) any later version. | |
14 | ||
15 | // This program is distributed in the hope that it will be useful, | |
16 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | // GNU General Public License for more details. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License | |
21 | // along with this program; if not, write to the Free Software | |
22 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
23 | // MA 02110-1301, USA. | |
24 | ||
25 | #include "gold.h" | |
26 | ||
27 | #include <algorithm> | |
28 | #include <set> | |
29 | #include <sstream> | |
30 | #include "demangle.h" | |
31 | ||
32 | #include "elfcpp.h" | |
33 | #include "parameters.h" | |
34 | #include "reloc.h" | |
35 | #include "mips.h" | |
36 | #include "object.h" | |
37 | #include "symtab.h" | |
38 | #include "layout.h" | |
39 | #include "output.h" | |
40 | #include "copy-relocs.h" | |
41 | #include "target.h" | |
42 | #include "target-reloc.h" | |
43 | #include "target-select.h" | |
44 | #include "tls.h" | |
45 | #include "errors.h" | |
46 | #include "gc.h" | |
62661c93 | 47 | #include "nacl.h" |
9810d34d SS |
48 | |
49 | namespace | |
50 | { | |
51 | using namespace gold; | |
52 | ||
53 | template<int size, bool big_endian> | |
54 | class Mips_output_data_plt; | |
55 | ||
56 | template<int size, bool big_endian> | |
57 | class Mips_output_data_got; | |
58 | ||
59 | template<int size, bool big_endian> | |
60 | class Target_mips; | |
61 | ||
62 | template<int size, bool big_endian> | |
63 | class Mips_output_section_reginfo; | |
64 | ||
65 | template<int size, bool big_endian> | |
66 | class Mips_output_data_la25_stub; | |
67 | ||
68 | template<int size, bool big_endian> | |
69 | class Mips_output_data_mips_stubs; | |
70 | ||
71 | template<int size> | |
72 | class Mips_symbol; | |
73 | ||
74 | template<int size, bool big_endian> | |
75 | class Mips_got_info; | |
76 | ||
77 | template<int size, bool big_endian> | |
78 | class Mips_relobj; | |
79 | ||
80 | class Mips16_stub_section_base; | |
81 | ||
82 | template<int size, bool big_endian> | |
83 | class Mips16_stub_section; | |
84 | ||
85 | // The ABI says that every symbol used by dynamic relocations must have | |
86 | // a global GOT entry. Among other things, this provides the dynamic | |
87 | // linker with a free, directly-indexed cache. The GOT can therefore | |
88 | // contain symbols that are not referenced by GOT relocations themselves | |
89 | // (in other words, it may have symbols that are not referenced by things | |
90 | // like R_MIPS_GOT16 and R_MIPS_GOT_PAGE). | |
91 | ||
92 | // GOT relocations are less likely to overflow if we put the associated | |
93 | // GOT entries towards the beginning. We therefore divide the global | |
94 | // GOT entries into two areas: "normal" and "reloc-only". Entries in | |
95 | // the first area can be used for both dynamic relocations and GP-relative | |
96 | // accesses, while those in the "reloc-only" area are for dynamic | |
97 | // relocations only. | |
98 | ||
99 | // These GGA_* ("Global GOT Area") values are organised so that lower | |
100 | // values are more general than higher values. Also, non-GGA_NONE | |
101 | // values are ordered by the position of the area in the GOT. | |
102 | ||
103 | enum Global_got_area | |
104 | { | |
105 | GGA_NORMAL = 0, | |
106 | GGA_RELOC_ONLY = 1, | |
107 | GGA_NONE = 2 | |
108 | }; | |
109 | ||
110 | // The types of GOT entries needed for this platform. | |
111 | // These values are exposed to the ABI in an incremental link. | |
112 | // Do not renumber existing values without changing the version | |
113 | // number of the .gnu_incremental_inputs section. | |
114 | enum Got_type | |
115 | { | |
116 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
117 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
118 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
119 | ||
120 | // GOT entries for multi-GOT. We support up to 1024 GOTs in multi-GOT links. | |
121 | GOT_TYPE_STANDARD_MULTIGOT = 3, | |
122 | GOT_TYPE_TLS_OFFSET_MULTIGOT = GOT_TYPE_STANDARD_MULTIGOT + 1024, | |
123 | GOT_TYPE_TLS_PAIR_MULTIGOT = GOT_TYPE_TLS_OFFSET_MULTIGOT + 1024 | |
124 | }; | |
125 | ||
126 | // TLS type of GOT entry. | |
127 | enum Got_tls_type | |
128 | { | |
129 | GOT_TLS_NONE = 0, | |
130 | GOT_TLS_GD = 1, | |
131 | GOT_TLS_LDM = 2, | |
132 | GOT_TLS_IE = 4 | |
133 | }; | |
134 | ||
47a9f4fc VR |
135 | // Values found in the r_ssym field of a relocation entry. |
136 | enum Special_relocation_symbol | |
137 | { | |
138 | RSS_UNDEF = 0, // None - value is zero. | |
139 | RSS_GP = 1, // Value of GP. | |
140 | RSS_GP0 = 2, // Value of GP in object being relocated. | |
141 | RSS_LOC = 3 // Address of location being relocated. | |
142 | }; | |
143 | ||
144 | // Whether the section is readonly. | |
145 | static inline bool | |
146 | is_readonly_section(Output_section* output_section) | |
147 | { | |
148 | elfcpp::Elf_Xword section_flags = output_section->flags(); | |
149 | elfcpp::Elf_Word section_type = output_section->type(); | |
150 | ||
151 | if (section_type == elfcpp::SHT_NOBITS) | |
152 | return false; | |
153 | ||
154 | if (section_flags & elfcpp::SHF_WRITE) | |
155 | return false; | |
156 | ||
157 | return true; | |
158 | } | |
159 | ||
9810d34d SS |
160 | // Return TRUE if a relocation of type R_TYPE from OBJECT might |
161 | // require an la25 stub. See also local_pic_function, which determines | |
162 | // whether the destination function ever requires a stub. | |
163 | template<int size, bool big_endian> | |
164 | static inline bool | |
165 | relocation_needs_la25_stub(Mips_relobj<size, big_endian>* object, | |
166 | unsigned int r_type, bool target_is_16_bit_code) | |
167 | { | |
168 | // We specifically ignore branches and jumps from EF_PIC objects, | |
169 | // where the onus is on the compiler or programmer to perform any | |
170 | // necessary initialization of $25. Sometimes such initialization | |
171 | // is unnecessary; for example, -mno-shared functions do not use | |
172 | // the incoming value of $25, and may therefore be called directly. | |
173 | if (object->is_pic()) | |
174 | return false; | |
175 | ||
176 | switch (r_type) | |
177 | { | |
178 | case elfcpp::R_MIPS_26: | |
179 | case elfcpp::R_MIPS_PC16: | |
180 | case elfcpp::R_MICROMIPS_26_S1: | |
181 | case elfcpp::R_MICROMIPS_PC7_S1: | |
182 | case elfcpp::R_MICROMIPS_PC10_S1: | |
183 | case elfcpp::R_MICROMIPS_PC16_S1: | |
184 | case elfcpp::R_MICROMIPS_PC23_S2: | |
185 | return true; | |
186 | ||
187 | case elfcpp::R_MIPS16_26: | |
188 | return !target_is_16_bit_code; | |
189 | ||
190 | default: | |
191 | return false; | |
192 | } | |
193 | } | |
194 | ||
195 | // Return true if SYM is a locally-defined PIC function, in the sense | |
196 | // that it or its fn_stub might need $25 to be valid on entry. | |
197 | // Note that MIPS16 functions set up $gp using PC-relative instructions, | |
198 | // so they themselves never need $25 to be valid. Only non-MIPS16 | |
199 | // entry points are of interest here. | |
200 | template<int size, bool big_endian> | |
201 | static inline bool | |
202 | local_pic_function(Mips_symbol<size>* sym) | |
203 | { | |
204 | bool def_regular = (sym->source() == Symbol::FROM_OBJECT | |
205 | && !sym->object()->is_dynamic() | |
206 | && !sym->is_undefined()); | |
207 | ||
208 | if (sym->is_defined() && def_regular) | |
209 | { | |
210 | Mips_relobj<size, big_endian>* object = | |
211 | static_cast<Mips_relobj<size, big_endian>*>(sym->object()); | |
212 | ||
213 | if ((object->is_pic() || sym->is_pic()) | |
214 | && (!sym->is_mips16() | |
215 | || (sym->has_mips16_fn_stub() && sym->need_fn_stub()))) | |
216 | return true; | |
217 | } | |
218 | return false; | |
219 | } | |
220 | ||
221 | static inline bool | |
222 | hi16_reloc(int r_type) | |
223 | { | |
224 | return (r_type == elfcpp::R_MIPS_HI16 | |
225 | || r_type == elfcpp::R_MIPS16_HI16 | |
226 | || r_type == elfcpp::R_MICROMIPS_HI16); | |
227 | } | |
228 | ||
229 | static inline bool | |
230 | lo16_reloc(int r_type) | |
231 | { | |
232 | return (r_type == elfcpp::R_MIPS_LO16 | |
233 | || r_type == elfcpp::R_MIPS16_LO16 | |
234 | || r_type == elfcpp::R_MICROMIPS_LO16); | |
235 | } | |
236 | ||
237 | static inline bool | |
238 | got16_reloc(unsigned int r_type) | |
239 | { | |
240 | return (r_type == elfcpp::R_MIPS_GOT16 | |
241 | || r_type == elfcpp::R_MIPS16_GOT16 | |
242 | || r_type == elfcpp::R_MICROMIPS_GOT16); | |
243 | } | |
244 | ||
245 | static inline bool | |
246 | call_lo16_reloc(unsigned int r_type) | |
247 | { | |
248 | return (r_type == elfcpp::R_MIPS_CALL_LO16 | |
249 | || r_type == elfcpp::R_MICROMIPS_CALL_LO16); | |
250 | } | |
251 | ||
252 | static inline bool | |
253 | got_lo16_reloc(unsigned int r_type) | |
254 | { | |
255 | return (r_type == elfcpp::R_MIPS_GOT_LO16 | |
256 | || r_type == elfcpp::R_MICROMIPS_GOT_LO16); | |
257 | } | |
258 | ||
47a9f4fc VR |
259 | static inline bool |
260 | eh_reloc(unsigned int r_type) | |
261 | { | |
262 | return (r_type == elfcpp::R_MIPS_EH); | |
263 | } | |
264 | ||
9810d34d SS |
265 | static inline bool |
266 | got_disp_reloc(unsigned int r_type) | |
267 | { | |
268 | return (r_type == elfcpp::R_MIPS_GOT_DISP | |
269 | || r_type == elfcpp::R_MICROMIPS_GOT_DISP); | |
270 | } | |
271 | ||
272 | static inline bool | |
273 | got_page_reloc(unsigned int r_type) | |
274 | { | |
275 | return (r_type == elfcpp::R_MIPS_GOT_PAGE | |
276 | || r_type == elfcpp::R_MICROMIPS_GOT_PAGE); | |
277 | } | |
278 | ||
279 | static inline bool | |
280 | tls_gd_reloc(unsigned int r_type) | |
281 | { | |
282 | return (r_type == elfcpp::R_MIPS_TLS_GD | |
283 | || r_type == elfcpp::R_MIPS16_TLS_GD | |
284 | || r_type == elfcpp::R_MICROMIPS_TLS_GD); | |
285 | } | |
286 | ||
287 | static inline bool | |
288 | tls_gottprel_reloc(unsigned int r_type) | |
289 | { | |
290 | return (r_type == elfcpp::R_MIPS_TLS_GOTTPREL | |
291 | || r_type == elfcpp::R_MIPS16_TLS_GOTTPREL | |
292 | || r_type == elfcpp::R_MICROMIPS_TLS_GOTTPREL); | |
293 | } | |
294 | ||
295 | static inline bool | |
296 | tls_ldm_reloc(unsigned int r_type) | |
297 | { | |
298 | return (r_type == elfcpp::R_MIPS_TLS_LDM | |
299 | || r_type == elfcpp::R_MIPS16_TLS_LDM | |
300 | || r_type == elfcpp::R_MICROMIPS_TLS_LDM); | |
301 | } | |
302 | ||
303 | static inline bool | |
304 | mips16_call_reloc(unsigned int r_type) | |
305 | { | |
306 | return (r_type == elfcpp::R_MIPS16_26 | |
307 | || r_type == elfcpp::R_MIPS16_CALL16); | |
308 | } | |
309 | ||
310 | static inline bool | |
311 | jal_reloc(unsigned int r_type) | |
312 | { | |
313 | return (r_type == elfcpp::R_MIPS_26 | |
314 | || r_type == elfcpp::R_MIPS16_26 | |
315 | || r_type == elfcpp::R_MICROMIPS_26_S1); | |
316 | } | |
317 | ||
318 | static inline bool | |
319 | micromips_branch_reloc(unsigned int r_type) | |
320 | { | |
321 | return (r_type == elfcpp::R_MICROMIPS_26_S1 | |
322 | || r_type == elfcpp::R_MICROMIPS_PC16_S1 | |
323 | || r_type == elfcpp::R_MICROMIPS_PC10_S1 | |
324 | || r_type == elfcpp::R_MICROMIPS_PC7_S1); | |
325 | } | |
326 | ||
327 | // Check if R_TYPE is a MIPS16 reloc. | |
328 | static inline bool | |
329 | mips16_reloc(unsigned int r_type) | |
330 | { | |
331 | switch (r_type) | |
332 | { | |
333 | case elfcpp::R_MIPS16_26: | |
334 | case elfcpp::R_MIPS16_GPREL: | |
335 | case elfcpp::R_MIPS16_GOT16: | |
336 | case elfcpp::R_MIPS16_CALL16: | |
337 | case elfcpp::R_MIPS16_HI16: | |
338 | case elfcpp::R_MIPS16_LO16: | |
339 | case elfcpp::R_MIPS16_TLS_GD: | |
340 | case elfcpp::R_MIPS16_TLS_LDM: | |
341 | case elfcpp::R_MIPS16_TLS_DTPREL_HI16: | |
342 | case elfcpp::R_MIPS16_TLS_DTPREL_LO16: | |
343 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
344 | case elfcpp::R_MIPS16_TLS_TPREL_HI16: | |
345 | case elfcpp::R_MIPS16_TLS_TPREL_LO16: | |
346 | return true; | |
347 | ||
348 | default: | |
349 | return false; | |
350 | } | |
351 | } | |
352 | ||
353 | // Check if R_TYPE is a microMIPS reloc. | |
354 | static inline bool | |
355 | micromips_reloc(unsigned int r_type) | |
356 | { | |
357 | switch (r_type) | |
358 | { | |
359 | case elfcpp::R_MICROMIPS_26_S1: | |
360 | case elfcpp::R_MICROMIPS_HI16: | |
361 | case elfcpp::R_MICROMIPS_LO16: | |
362 | case elfcpp::R_MICROMIPS_GPREL16: | |
363 | case elfcpp::R_MICROMIPS_LITERAL: | |
364 | case elfcpp::R_MICROMIPS_GOT16: | |
365 | case elfcpp::R_MICROMIPS_PC7_S1: | |
366 | case elfcpp::R_MICROMIPS_PC10_S1: | |
367 | case elfcpp::R_MICROMIPS_PC16_S1: | |
368 | case elfcpp::R_MICROMIPS_CALL16: | |
369 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
370 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
371 | case elfcpp::R_MICROMIPS_GOT_OFST: | |
372 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
373 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
374 | case elfcpp::R_MICROMIPS_SUB: | |
375 | case elfcpp::R_MICROMIPS_HIGHER: | |
376 | case elfcpp::R_MICROMIPS_HIGHEST: | |
377 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
378 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
379 | case elfcpp::R_MICROMIPS_SCN_DISP: | |
380 | case elfcpp::R_MICROMIPS_JALR: | |
381 | case elfcpp::R_MICROMIPS_HI0_LO16: | |
382 | case elfcpp::R_MICROMIPS_TLS_GD: | |
383 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
384 | case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16: | |
385 | case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16: | |
386 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
387 | case elfcpp::R_MICROMIPS_TLS_TPREL_HI16: | |
388 | case elfcpp::R_MICROMIPS_TLS_TPREL_LO16: | |
389 | case elfcpp::R_MICROMIPS_GPREL7_S2: | |
390 | case elfcpp::R_MICROMIPS_PC23_S2: | |
391 | return true; | |
392 | ||
393 | default: | |
394 | return false; | |
395 | } | |
396 | } | |
397 | ||
398 | static inline bool | |
399 | is_matching_lo16_reloc(unsigned int high_reloc, unsigned int lo16_reloc) | |
400 | { | |
401 | switch (high_reloc) | |
402 | { | |
403 | case elfcpp::R_MIPS_HI16: | |
404 | case elfcpp::R_MIPS_GOT16: | |
405 | return lo16_reloc == elfcpp::R_MIPS_LO16; | |
406 | case elfcpp::R_MIPS16_HI16: | |
407 | case elfcpp::R_MIPS16_GOT16: | |
408 | return lo16_reloc == elfcpp::R_MIPS16_LO16; | |
409 | case elfcpp::R_MICROMIPS_HI16: | |
410 | case elfcpp::R_MICROMIPS_GOT16: | |
411 | return lo16_reloc == elfcpp::R_MICROMIPS_LO16; | |
412 | default: | |
413 | return false; | |
414 | } | |
415 | } | |
416 | ||
417 | // This class is used to hold information about one GOT entry. | |
418 | // There are three types of entry: | |
419 | // | |
420 | // (1) a SYMBOL + OFFSET address, where SYMBOL is local to an input object | |
421 | // (object != NULL, symndx >= 0, tls_type != GOT_TLS_LDM) | |
422 | // (2) a SYMBOL address, where SYMBOL is not local to an input object | |
15eb1beb VR |
423 | // (sym != NULL, symndx == -1) |
424 | // (3) a TLS LDM slot (there's only one of these per GOT.) | |
9810d34d SS |
425 | // (object != NULL, symndx == 0, tls_type == GOT_TLS_LDM) |
426 | ||
427 | template<int size, bool big_endian> | |
428 | class Mips_got_entry | |
429 | { | |
430 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
431 | ||
432 | public: | |
433 | Mips_got_entry(Mips_relobj<size, big_endian>* object, unsigned int symndx, | |
434 | Mips_address addend, unsigned char tls_type, | |
47a9f4fc | 435 | unsigned int shndx, bool is_section_symbol) |
15eb1beb | 436 | : addend_(addend), symndx_(symndx), tls_type_(tls_type), |
47a9f4fc | 437 | is_section_symbol_(is_section_symbol), shndx_(shndx) |
15eb1beb | 438 | { this->d.object = object; } |
9810d34d | 439 | |
15eb1beb VR |
440 | Mips_got_entry(Mips_symbol<size>* sym, unsigned char tls_type) |
441 | : addend_(0), symndx_(-1U), tls_type_(tls_type), | |
47a9f4fc | 442 | is_section_symbol_(false), shndx_(-1U) |
9810d34d SS |
443 | { this->d.sym = sym; } |
444 | ||
445 | // Return whether this entry is for a local symbol. | |
446 | bool | |
447 | is_for_local_symbol() const | |
448 | { return this->symndx_ != -1U; } | |
449 | ||
450 | // Return whether this entry is for a global symbol. | |
451 | bool | |
452 | is_for_global_symbol() const | |
453 | { return this->symndx_ == -1U; } | |
454 | ||
455 | // Return the hash of this entry. | |
456 | size_t | |
457 | hash() const | |
458 | { | |
459 | if (this->tls_type_ == GOT_TLS_LDM) | |
460 | return this->symndx_ + (1 << 18); | |
15eb1beb VR |
461 | |
462 | size_t name_hash_value = gold::string_hash<char>( | |
463 | (this->symndx_ != -1U) | |
464 | ? this->d.object->name().c_str() | |
465 | : this->d.sym->name()); | |
466 | size_t addend = this->addend_; | |
467 | return name_hash_value ^ this->symndx_ ^ addend; | |
9810d34d SS |
468 | } |
469 | ||
470 | // Return whether this entry is equal to OTHER. | |
471 | bool | |
472 | equals(Mips_got_entry<size, big_endian>* other) const | |
473 | { | |
9810d34d SS |
474 | if (this->tls_type_ == GOT_TLS_LDM) |
475 | return true; | |
15eb1beb VR |
476 | |
477 | return ((this->tls_type_ == other->tls_type_) | |
478 | && (this->symndx_ == other->symndx_) | |
479 | && ((this->symndx_ != -1U) | |
480 | ? (this->d.object == other->d.object) | |
481 | : (this->d.sym == other->d.sym)) | |
482 | && (this->addend_ == other->addend_)); | |
9810d34d SS |
483 | } |
484 | ||
485 | // Return input object that needs this GOT entry. | |
486 | Mips_relobj<size, big_endian>* | |
487 | object() const | |
488 | { | |
15eb1beb VR |
489 | gold_assert(this->symndx_ != -1U); |
490 | return this->d.object; | |
9810d34d SS |
491 | } |
492 | ||
493 | // Return local symbol index for local GOT entries. | |
494 | unsigned int | |
495 | symndx() const | |
496 | { | |
497 | gold_assert(this->symndx_ != -1U); | |
498 | return this->symndx_; | |
499 | } | |
500 | ||
501 | // Return the relocation addend for local GOT entries. | |
502 | Mips_address | |
503 | addend() const | |
15eb1beb | 504 | { return this->addend_; } |
9810d34d SS |
505 | |
506 | // Return global symbol for global GOT entries. | |
507 | Mips_symbol<size>* | |
508 | sym() const | |
509 | { | |
510 | gold_assert(this->symndx_ == -1U); | |
511 | return this->d.sym; | |
512 | } | |
513 | ||
514 | // Return whether this is a TLS GOT entry. | |
515 | bool | |
516 | is_tls_entry() const | |
517 | { return this->tls_type_ != GOT_TLS_NONE; } | |
518 | ||
519 | // Return TLS type of this GOT entry. | |
520 | unsigned char | |
521 | tls_type() const | |
522 | { return this->tls_type_; } | |
523 | ||
524 | // Return section index of the local symbol for local GOT entries. | |
525 | unsigned int | |
526 | shndx() const | |
527 | { return this->shndx_; } | |
528 | ||
47a9f4fc VR |
529 | // Return whether this is a STT_SECTION symbol. |
530 | bool | |
531 | is_section_symbol() const | |
532 | { return this->is_section_symbol_; } | |
533 | ||
9810d34d | 534 | private: |
15eb1beb VR |
535 | // The addend. |
536 | Mips_address addend_; | |
537 | ||
9810d34d SS |
538 | // The index of the symbol if we have a local symbol; -1 otherwise. |
539 | unsigned int symndx_; | |
540 | ||
541 | union | |
542 | { | |
15eb1beb VR |
543 | // The input object for local symbols that needs the GOT entry. |
544 | Mips_relobj<size, big_endian>* object; | |
9810d34d SS |
545 | // If symndx == -1, the global symbol corresponding to this GOT entry. The |
546 | // symbol's entry is in the local area if mips_sym->global_got_area is | |
547 | // GGA_NONE, otherwise it is in the global area. | |
548 | Mips_symbol<size>* sym; | |
549 | } d; | |
550 | ||
551 | // The TLS type of this GOT entry. An LDM GOT entry will be a local | |
552 | // symbol entry with r_symndx == 0. | |
553 | unsigned char tls_type_; | |
554 | ||
47a9f4fc VR |
555 | // Whether this is a STT_SECTION symbol. |
556 | bool is_section_symbol_; | |
557 | ||
9810d34d SS |
558 | // For local GOT entries, section index of the local symbol. |
559 | unsigned int shndx_; | |
560 | }; | |
561 | ||
562 | // Hash for Mips_got_entry. | |
563 | ||
564 | template<int size, bool big_endian> | |
565 | class Mips_got_entry_hash | |
566 | { | |
567 | public: | |
568 | size_t | |
569 | operator()(Mips_got_entry<size, big_endian>* entry) const | |
570 | { return entry->hash(); } | |
571 | }; | |
572 | ||
573 | // Equality for Mips_got_entry. | |
574 | ||
575 | template<int size, bool big_endian> | |
576 | class Mips_got_entry_eq | |
577 | { | |
578 | public: | |
579 | bool | |
580 | operator()(Mips_got_entry<size, big_endian>* e1, | |
581 | Mips_got_entry<size, big_endian>* e2) const | |
582 | { return e1->equals(e2); } | |
583 | }; | |
584 | ||
15eb1beb VR |
585 | // Hash for Mips_symbol. |
586 | ||
587 | template<int size> | |
588 | class Mips_symbol_hash | |
589 | { | |
590 | public: | |
591 | size_t | |
592 | operator()(Mips_symbol<size>* sym) const | |
593 | { return sym->hash(); } | |
594 | }; | |
595 | ||
9810d34d SS |
596 | // Got_page_range. This class describes a range of addends: [MIN_ADDEND, |
597 | // MAX_ADDEND]. The instances form a non-overlapping list that is sorted by | |
598 | // increasing MIN_ADDEND. | |
599 | ||
600 | struct Got_page_range | |
601 | { | |
602 | Got_page_range() | |
603 | : next(NULL), min_addend(0), max_addend(0) | |
604 | { } | |
605 | ||
606 | Got_page_range* next; | |
607 | int min_addend; | |
608 | int max_addend; | |
609 | ||
610 | // Return the maximum number of GOT page entries required. | |
611 | int | |
612 | get_max_pages() | |
613 | { return (this->max_addend - this->min_addend + 0x1ffff) >> 16; } | |
614 | }; | |
615 | ||
616 | // Got_page_entry. This class describes the range of addends that are applied | |
617 | // to page relocations against a given symbol. | |
618 | ||
619 | struct Got_page_entry | |
620 | { | |
621 | Got_page_entry() | |
622 | : object(NULL), symndx(-1U), ranges(NULL), num_pages(0) | |
623 | { } | |
624 | ||
625 | Got_page_entry(Object* object_, unsigned int symndx_) | |
626 | : object(object_), symndx(symndx_), ranges(NULL), num_pages(0) | |
627 | { } | |
628 | ||
629 | // The input object that needs the GOT page entry. | |
630 | Object* object; | |
631 | // The index of the symbol, as stored in the relocation r_info. | |
632 | unsigned int symndx; | |
633 | // The ranges for this page entry. | |
634 | Got_page_range* ranges; | |
635 | // The maximum number of page entries needed for RANGES. | |
636 | unsigned int num_pages; | |
637 | }; | |
638 | ||
639 | // Hash for Got_page_entry. | |
640 | ||
641 | struct Got_page_entry_hash | |
642 | { | |
643 | size_t | |
644 | operator()(Got_page_entry* entry) const | |
645 | { return reinterpret_cast<uintptr_t>(entry->object) + entry->symndx; } | |
646 | }; | |
647 | ||
648 | // Equality for Got_page_entry. | |
649 | ||
650 | struct Got_page_entry_eq | |
651 | { | |
652 | bool | |
653 | operator()(Got_page_entry* entry1, Got_page_entry* entry2) const | |
654 | { | |
655 | return entry1->object == entry2->object && entry1->symndx == entry2->symndx; | |
656 | } | |
657 | }; | |
658 | ||
659 | // This class is used to hold .got information when linking. | |
660 | ||
661 | template<int size, bool big_endian> | |
662 | class Mips_got_info | |
663 | { | |
664 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
665 | typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> | |
666 | Reloc_section; | |
667 | typedef Unordered_map<unsigned int, unsigned int> Got_page_offsets; | |
668 | ||
669 | // Unordered set of GOT entries. | |
670 | typedef Unordered_set<Mips_got_entry<size, big_endian>*, | |
671 | Mips_got_entry_hash<size, big_endian>, | |
672 | Mips_got_entry_eq<size, big_endian> > Got_entry_set; | |
673 | ||
674 | // Unordered set of GOT page entries. | |
675 | typedef Unordered_set<Got_page_entry*, | |
676 | Got_page_entry_hash, Got_page_entry_eq> Got_page_entry_set; | |
677 | ||
15eb1beb VR |
678 | // Unordered set of global GOT entries. |
679 | typedef Unordered_set<Mips_symbol<size>*, Mips_symbol_hash<size> > | |
680 | Global_got_entry_set; | |
681 | ||
9810d34d SS |
682 | public: |
683 | Mips_got_info() | |
684 | : local_gotno_(0), page_gotno_(0), global_gotno_(0), reloc_only_gotno_(0), | |
685 | tls_gotno_(0), tls_ldm_offset_(-1U), global_got_symbols_(), | |
686 | got_entries_(), got_page_entries_(), got_page_offset_start_(0), | |
687 | got_page_offset_next_(0), got_page_offsets_(), next_(NULL), index_(-1U), | |
688 | offset_(0) | |
689 | { } | |
690 | ||
691 | // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol | |
692 | // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT. | |
693 | void | |
694 | record_local_got_symbol(Mips_relobj<size, big_endian>* object, | |
695 | unsigned int symndx, Mips_address addend, | |
47a9f4fc VR |
696 | unsigned int r_type, unsigned int shndx, |
697 | bool is_section_symbol); | |
9810d34d SS |
698 | |
699 | // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM, | |
700 | // in OBJECT. FOR_CALL is true if the caller is only interested in | |
701 | // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic | |
702 | // relocation. | |
703 | void | |
704 | record_global_got_symbol(Mips_symbol<size>* mips_sym, | |
705 | Mips_relobj<size, big_endian>* object, | |
706 | unsigned int r_type, bool dyn_reloc, bool for_call); | |
707 | ||
708 | // Add ENTRY to master GOT and to OBJECT's GOT. | |
709 | void | |
710 | record_got_entry(Mips_got_entry<size, big_endian>* entry, | |
711 | Mips_relobj<size, big_endian>* object); | |
712 | ||
713 | // Record that OBJECT has a page relocation against symbol SYMNDX and | |
714 | // that ADDEND is the addend for that relocation. | |
715 | void | |
716 | record_got_page_entry(Mips_relobj<size, big_endian>* object, | |
717 | unsigned int symndx, int addend); | |
718 | ||
719 | // Create all entries that should be in the local part of the GOT. | |
720 | void | |
721 | add_local_entries(Target_mips<size, big_endian>* target, Layout* layout); | |
722 | ||
723 | // Create GOT page entries. | |
724 | void | |
725 | add_page_entries(Target_mips<size, big_endian>* target, Layout* layout); | |
726 | ||
727 | // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY. | |
728 | void | |
729 | add_global_entries(Target_mips<size, big_endian>* target, Layout* layout, | |
730 | unsigned int non_reloc_only_global_gotno); | |
731 | ||
732 | // Create global GOT entries that should be in the GGA_RELOC_ONLY area. | |
733 | void | |
734 | add_reloc_only_entries(Mips_output_data_got<size, big_endian>* got); | |
735 | ||
736 | // Create TLS GOT entries. | |
737 | void | |
738 | add_tls_entries(Target_mips<size, big_endian>* target, Layout* layout); | |
739 | ||
740 | // Decide whether the symbol needs an entry in the global part of the primary | |
741 | // GOT, setting global_got_area accordingly. Count the number of global | |
742 | // symbols that are in the primary GOT only because they have dynamic | |
743 | // relocations R_MIPS_REL32 against them (reloc_only_gotno). | |
744 | void | |
745 | count_got_symbols(Symbol_table* symtab); | |
746 | ||
747 | // Return the offset of GOT page entry for VALUE. | |
748 | unsigned int | |
749 | get_got_page_offset(Mips_address value, | |
750 | Mips_output_data_got<size, big_endian>* got); | |
751 | ||
752 | // Count the number of GOT entries required. | |
753 | void | |
754 | count_got_entries(); | |
755 | ||
756 | // Count the number of GOT entries required by ENTRY. Accumulate the result. | |
757 | void | |
758 | count_got_entry(Mips_got_entry<size, big_endian>* entry); | |
759 | ||
760 | // Add FROM's GOT entries. | |
761 | void | |
762 | add_got_entries(Mips_got_info<size, big_endian>* from); | |
763 | ||
764 | // Add FROM's GOT page entries. | |
765 | void | |
766 | add_got_page_entries(Mips_got_info<size, big_endian>* from); | |
767 | ||
768 | // Return GOT size. | |
769 | unsigned int | |
770 | got_size() const | |
771 | { return ((2 + this->local_gotno_ + this->page_gotno_ + this->global_gotno_ | |
772 | + this->tls_gotno_) * size/8); | |
773 | } | |
774 | ||
775 | // Return the number of local GOT entries. | |
776 | unsigned int | |
777 | local_gotno() const | |
778 | { return this->local_gotno_; } | |
779 | ||
780 | // Return the maximum number of page GOT entries needed. | |
781 | unsigned int | |
782 | page_gotno() const | |
783 | { return this->page_gotno_; } | |
784 | ||
785 | // Return the number of global GOT entries. | |
786 | unsigned int | |
787 | global_gotno() const | |
788 | { return this->global_gotno_; } | |
789 | ||
790 | // Set the number of global GOT entries. | |
791 | void | |
792 | set_global_gotno(unsigned int global_gotno) | |
793 | { this->global_gotno_ = global_gotno; } | |
794 | ||
795 | // Return the number of GGA_RELOC_ONLY global GOT entries. | |
796 | unsigned int | |
797 | reloc_only_gotno() const | |
798 | { return this->reloc_only_gotno_; } | |
799 | ||
800 | // Return the number of TLS GOT entries. | |
801 | unsigned int | |
802 | tls_gotno() const | |
803 | { return this->tls_gotno_; } | |
804 | ||
805 | // Return the GOT type for this GOT. Used for multi-GOT links only. | |
806 | unsigned int | |
807 | multigot_got_type(unsigned int got_type) const | |
808 | { | |
809 | switch (got_type) | |
810 | { | |
811 | case GOT_TYPE_STANDARD: | |
812 | return GOT_TYPE_STANDARD_MULTIGOT + this->index_; | |
813 | case GOT_TYPE_TLS_OFFSET: | |
814 | return GOT_TYPE_TLS_OFFSET_MULTIGOT + this->index_; | |
815 | case GOT_TYPE_TLS_PAIR: | |
816 | return GOT_TYPE_TLS_PAIR_MULTIGOT + this->index_; | |
817 | default: | |
818 | gold_unreachable(); | |
819 | } | |
820 | } | |
821 | ||
822 | // Remove lazy-binding stubs for global symbols in this GOT. | |
823 | void | |
824 | remove_lazy_stubs(Target_mips<size, big_endian>* target); | |
825 | ||
826 | // Return offset of this GOT from the start of .got section. | |
827 | unsigned int | |
828 | offset() const | |
829 | { return this->offset_; } | |
830 | ||
831 | // Set offset of this GOT from the start of .got section. | |
832 | void | |
833 | set_offset(unsigned int offset) | |
834 | { this->offset_ = offset; } | |
835 | ||
836 | // Set index of this GOT in multi-GOT links. | |
837 | void | |
838 | set_index(unsigned int index) | |
839 | { this->index_ = index; } | |
840 | ||
841 | // Return next GOT in multi-GOT links. | |
842 | Mips_got_info<size, big_endian>* | |
843 | next() const | |
844 | { return this->next_; } | |
845 | ||
846 | // Set next GOT in multi-GOT links. | |
847 | void | |
848 | set_next(Mips_got_info<size, big_endian>* next) | |
849 | { this->next_ = next; } | |
850 | ||
851 | // Return the offset of TLS LDM entry for this GOT. | |
852 | unsigned int | |
853 | tls_ldm_offset() const | |
854 | { return this->tls_ldm_offset_; } | |
855 | ||
856 | // Set the offset of TLS LDM entry for this GOT. | |
857 | void | |
858 | set_tls_ldm_offset(unsigned int tls_ldm_offset) | |
859 | { this->tls_ldm_offset_ = tls_ldm_offset; } | |
860 | ||
15eb1beb | 861 | Global_got_entry_set& |
9810d34d SS |
862 | global_got_symbols() |
863 | { return this->global_got_symbols_; } | |
864 | ||
865 | // Return the GOT_TLS_* type required by relocation type R_TYPE. | |
866 | static int | |
867 | mips_elf_reloc_tls_type(unsigned int r_type) | |
868 | { | |
869 | if (tls_gd_reloc(r_type)) | |
870 | return GOT_TLS_GD; | |
871 | ||
872 | if (tls_ldm_reloc(r_type)) | |
873 | return GOT_TLS_LDM; | |
874 | ||
875 | if (tls_gottprel_reloc(r_type)) | |
876 | return GOT_TLS_IE; | |
877 | ||
878 | return GOT_TLS_NONE; | |
879 | } | |
880 | ||
881 | // Return the number of GOT slots needed for GOT TLS type TYPE. | |
882 | static int | |
883 | mips_tls_got_entries(unsigned int type) | |
884 | { | |
885 | switch (type) | |
886 | { | |
887 | case GOT_TLS_GD: | |
888 | case GOT_TLS_LDM: | |
889 | return 2; | |
890 | ||
891 | case GOT_TLS_IE: | |
892 | return 1; | |
893 | ||
894 | case GOT_TLS_NONE: | |
895 | return 0; | |
896 | ||
897 | default: | |
898 | gold_unreachable(); | |
899 | } | |
900 | } | |
901 | ||
902 | private: | |
903 | // The number of local GOT entries. | |
904 | unsigned int local_gotno_; | |
905 | // The maximum number of page GOT entries needed. | |
906 | unsigned int page_gotno_; | |
907 | // The number of global GOT entries. | |
908 | unsigned int global_gotno_; | |
909 | // The number of global GOT entries that are in the GGA_RELOC_ONLY area. | |
910 | unsigned int reloc_only_gotno_; | |
911 | // The number of TLS GOT entries. | |
912 | unsigned int tls_gotno_; | |
913 | // The offset of TLS LDM entry for this GOT. | |
914 | unsigned int tls_ldm_offset_; | |
915 | // All symbols that have global GOT entry. | |
15eb1beb | 916 | Global_got_entry_set global_got_symbols_; |
9810d34d SS |
917 | // A hash table holding GOT entries. |
918 | Got_entry_set got_entries_; | |
919 | // A hash table of GOT page entries. | |
920 | Got_page_entry_set got_page_entries_; | |
921 | // The offset of first GOT page entry for this GOT. | |
922 | unsigned int got_page_offset_start_; | |
923 | // The offset of next available GOT page entry for this GOT. | |
924 | unsigned int got_page_offset_next_; | |
925 | // A hash table that maps GOT page entry value to the GOT offset where | |
926 | // the entry is located. | |
927 | Got_page_offsets got_page_offsets_; | |
928 | // In multi-GOT links, a pointer to the next GOT. | |
929 | Mips_got_info<size, big_endian>* next_; | |
930 | // Index of this GOT in multi-GOT links. | |
931 | unsigned int index_; | |
932 | // The offset of this GOT in multi-GOT links. | |
933 | unsigned int offset_; | |
934 | }; | |
935 | ||
936 | // This is a helper class used during relocation scan. It records GOT16 addend. | |
937 | ||
938 | template<int size, bool big_endian> | |
939 | struct got16_addend | |
940 | { | |
941 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
942 | ||
943 | got16_addend(const Sized_relobj_file<size, big_endian>* _object, | |
944 | unsigned int _shndx, unsigned int _r_type, unsigned int _r_sym, | |
945 | Mips_address _addend) | |
946 | : object(_object), shndx(_shndx), r_type(_r_type), r_sym(_r_sym), | |
947 | addend(_addend) | |
948 | { } | |
949 | ||
950 | const Sized_relobj_file<size, big_endian>* object; | |
951 | unsigned int shndx; | |
952 | unsigned int r_type; | |
953 | unsigned int r_sym; | |
954 | Mips_address addend; | |
955 | }; | |
956 | ||
957 | // Mips_symbol class. Holds additional symbol information needed for Mips. | |
958 | ||
959 | template<int size> | |
960 | class Mips_symbol : public Sized_symbol<size> | |
961 | { | |
962 | public: | |
963 | Mips_symbol() | |
964 | : need_fn_stub_(false), has_nonpic_branches_(false), la25_stub_offset_(-1U), | |
965 | has_static_relocs_(false), no_lazy_stub_(false), lazy_stub_offset_(0), | |
966 | pointer_equality_needed_(false), global_got_area_(GGA_NONE), | |
967 | global_gotoffset_(-1U), got_only_for_calls_(true), has_lazy_stub_(false), | |
968 | needs_mips_plt_(false), needs_comp_plt_(false), mips_plt_offset_(-1U), | |
969 | comp_plt_offset_(-1U), mips16_fn_stub_(NULL), mips16_call_stub_(NULL), | |
970 | mips16_call_fp_stub_(NULL), applied_secondary_got_fixup_(false) | |
971 | { } | |
972 | ||
973 | // Return whether this is a MIPS16 symbol. | |
974 | bool | |
975 | is_mips16() const | |
976 | { | |
977 | // (st_other & STO_MIPS16) == STO_MIPS16 | |
978 | return ((this->nonvis() & (elfcpp::STO_MIPS16 >> 2)) | |
979 | == elfcpp::STO_MIPS16 >> 2); | |
980 | } | |
981 | ||
982 | // Return whether this is a microMIPS symbol. | |
983 | bool | |
984 | is_micromips() const | |
985 | { | |
986 | // (st_other & STO_MIPS_ISA) == STO_MICROMIPS | |
987 | return ((this->nonvis() & (elfcpp::STO_MIPS_ISA >> 2)) | |
988 | == elfcpp::STO_MICROMIPS >> 2); | |
989 | } | |
990 | ||
991 | // Return whether the symbol needs MIPS16 fn_stub. | |
992 | bool | |
993 | need_fn_stub() const | |
994 | { return this->need_fn_stub_; } | |
995 | ||
996 | // Set that the symbol needs MIPS16 fn_stub. | |
997 | void | |
998 | set_need_fn_stub() | |
999 | { this->need_fn_stub_ = true; } | |
1000 | ||
1001 | // Return whether this symbol is referenced by branch relocations from | |
1002 | // any non-PIC input file. | |
1003 | bool | |
1004 | has_nonpic_branches() const | |
1005 | { return this->has_nonpic_branches_; } | |
1006 | ||
1007 | // Set that this symbol is referenced by branch relocations from | |
1008 | // any non-PIC input file. | |
1009 | void | |
1010 | set_has_nonpic_branches() | |
1011 | { this->has_nonpic_branches_ = true; } | |
1012 | ||
1013 | // Return the offset of the la25 stub for this symbol from the start of the | |
1014 | // la25 stub section. | |
1015 | unsigned int | |
1016 | la25_stub_offset() const | |
1017 | { return this->la25_stub_offset_; } | |
1018 | ||
1019 | // Set the offset of the la25 stub for this symbol from the start of the | |
1020 | // la25 stub section. | |
1021 | void | |
1022 | set_la25_stub_offset(unsigned int offset) | |
1023 | { this->la25_stub_offset_ = offset; } | |
1024 | ||
1025 | // Return whether the symbol has la25 stub. This is true if this symbol is | |
1026 | // for a PIC function, and there are non-PIC branches and jumps to it. | |
1027 | bool | |
1028 | has_la25_stub() const | |
1029 | { return this->la25_stub_offset_ != -1U; } | |
1030 | ||
1031 | // Return whether there is a relocation against this symbol that must be | |
1032 | // resolved by the static linker (that is, the relocation cannot possibly | |
1033 | // be made dynamic). | |
1034 | bool | |
1035 | has_static_relocs() const | |
1036 | { return this->has_static_relocs_; } | |
1037 | ||
1038 | // Set that there is a relocation against this symbol that must be resolved | |
1039 | // by the static linker (that is, the relocation cannot possibly be made | |
1040 | // dynamic). | |
1041 | void | |
1042 | set_has_static_relocs() | |
1043 | { this->has_static_relocs_ = true; } | |
1044 | ||
1045 | // Return whether we must not create a lazy-binding stub for this symbol. | |
1046 | bool | |
1047 | no_lazy_stub() const | |
1048 | { return this->no_lazy_stub_; } | |
1049 | ||
1050 | // Set that we must not create a lazy-binding stub for this symbol. | |
1051 | void | |
1052 | set_no_lazy_stub() | |
1053 | { this->no_lazy_stub_ = true; } | |
1054 | ||
1055 | // Return the offset of the lazy-binding stub for this symbol from the start | |
1056 | // of .MIPS.stubs section. | |
1057 | unsigned int | |
1058 | lazy_stub_offset() const | |
1059 | { return this->lazy_stub_offset_; } | |
1060 | ||
1061 | // Set the offset of the lazy-binding stub for this symbol from the start | |
1062 | // of .MIPS.stubs section. | |
1063 | void | |
1064 | set_lazy_stub_offset(unsigned int offset) | |
1065 | { this->lazy_stub_offset_ = offset; } | |
1066 | ||
1067 | // Return whether there are any relocations for this symbol where | |
1068 | // pointer equality matters. | |
1069 | bool | |
1070 | pointer_equality_needed() const | |
1071 | { return this->pointer_equality_needed_; } | |
1072 | ||
1073 | // Set that there are relocations for this symbol where pointer equality | |
1074 | // matters. | |
1075 | void | |
1076 | set_pointer_equality_needed() | |
1077 | { this->pointer_equality_needed_ = true; } | |
1078 | ||
1079 | // Return global GOT area where this symbol in located. | |
1080 | Global_got_area | |
1081 | global_got_area() const | |
1082 | { return this->global_got_area_; } | |
1083 | ||
1084 | // Set global GOT area where this symbol in located. | |
1085 | void | |
1086 | set_global_got_area(Global_got_area global_got_area) | |
1087 | { this->global_got_area_ = global_got_area; } | |
1088 | ||
1089 | // Return the global GOT offset for this symbol. For multi-GOT links, this | |
1090 | // returns the offset from the start of .got section to the first GOT entry | |
1091 | // for the symbol. Note that in multi-GOT links the symbol can have entry | |
1092 | // in more than one GOT. | |
1093 | unsigned int | |
1094 | global_gotoffset() const | |
1095 | { return this->global_gotoffset_; } | |
1096 | ||
1097 | // Set the global GOT offset for this symbol. Note that in multi-GOT links | |
1098 | // the symbol can have entry in more than one GOT. This method will set | |
1099 | // the offset only if it is less than current offset. | |
1100 | void | |
1101 | set_global_gotoffset(unsigned int offset) | |
1102 | { | |
1103 | if (this->global_gotoffset_ == -1U || offset < this->global_gotoffset_) | |
1104 | this->global_gotoffset_ = offset; | |
1105 | } | |
1106 | ||
1107 | // Return whether all GOT relocations for this symbol are for calls. | |
1108 | bool | |
1109 | got_only_for_calls() const | |
1110 | { return this->got_only_for_calls_; } | |
1111 | ||
1112 | // Set that there is a GOT relocation for this symbol that is not for call. | |
1113 | void | |
1114 | set_got_not_only_for_calls() | |
1115 | { this->got_only_for_calls_ = false; } | |
1116 | ||
1117 | // Return whether this is a PIC symbol. | |
1118 | bool | |
1119 | is_pic() const | |
1120 | { | |
1121 | // (st_other & STO_MIPS_FLAGS) == STO_MIPS_PIC | |
1122 | return ((this->nonvis() & (elfcpp::STO_MIPS_FLAGS >> 2)) | |
1123 | == (elfcpp::STO_MIPS_PIC >> 2)); | |
1124 | } | |
1125 | ||
1126 | // Set the flag in st_other field that marks this symbol as PIC. | |
1127 | void | |
1128 | set_pic() | |
1129 | { | |
1130 | if (this->is_mips16()) | |
1131 | // (st_other & ~(STO_MIPS16 | STO_MIPS_FLAGS)) | STO_MIPS_PIC | |
1132 | this->set_nonvis((this->nonvis() | |
1133 | & ~((elfcpp::STO_MIPS16 >> 2) | |
1134 | | (elfcpp::STO_MIPS_FLAGS >> 2))) | |
1135 | | (elfcpp::STO_MIPS_PIC >> 2)); | |
1136 | else | |
1137 | // (other & ~STO_MIPS_FLAGS) | STO_MIPS_PIC | |
1138 | this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS >> 2)) | |
1139 | | (elfcpp::STO_MIPS_PIC >> 2)); | |
1140 | } | |
1141 | ||
1142 | // Set the flag in st_other field that marks this symbol as PLT. | |
1143 | void | |
1144 | set_mips_plt() | |
1145 | { | |
1146 | if (this->is_mips16()) | |
1147 | // (st_other & (STO_MIPS16 | ~STO_MIPS_FLAGS)) | STO_MIPS_PLT | |
1148 | this->set_nonvis((this->nonvis() | |
1149 | & ((elfcpp::STO_MIPS16 >> 2) | |
1150 | | ~(elfcpp::STO_MIPS_FLAGS >> 2))) | |
1151 | | (elfcpp::STO_MIPS_PLT >> 2)); | |
1152 | ||
1153 | else | |
1154 | // (st_other & ~STO_MIPS_FLAGS) | STO_MIPS_PLT | |
1155 | this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS >> 2)) | |
1156 | | (elfcpp::STO_MIPS_PLT >> 2)); | |
1157 | } | |
1158 | ||
1159 | // Downcast a base pointer to a Mips_symbol pointer. | |
1160 | static Mips_symbol<size>* | |
1161 | as_mips_sym(Symbol* sym) | |
1162 | { return static_cast<Mips_symbol<size>*>(sym); } | |
1163 | ||
1164 | // Downcast a base pointer to a Mips_symbol pointer. | |
1165 | static const Mips_symbol<size>* | |
1166 | as_mips_sym(const Symbol* sym) | |
1167 | { return static_cast<const Mips_symbol<size>*>(sym); } | |
1168 | ||
1169 | // Return whether the symbol has lazy-binding stub. | |
1170 | bool | |
1171 | has_lazy_stub() const | |
1172 | { return this->has_lazy_stub_; } | |
1173 | ||
1174 | // Set whether the symbol has lazy-binding stub. | |
1175 | void | |
1176 | set_has_lazy_stub(bool has_lazy_stub) | |
1177 | { this->has_lazy_stub_ = has_lazy_stub; } | |
1178 | ||
1179 | // Return whether the symbol needs a standard PLT entry. | |
1180 | bool | |
1181 | needs_mips_plt() const | |
1182 | { return this->needs_mips_plt_; } | |
1183 | ||
1184 | // Set whether the symbol needs a standard PLT entry. | |
1185 | void | |
1186 | set_needs_mips_plt(bool needs_mips_plt) | |
1187 | { this->needs_mips_plt_ = needs_mips_plt; } | |
1188 | ||
1189 | // Return whether the symbol needs a compressed (MIPS16 or microMIPS) PLT | |
1190 | // entry. | |
1191 | bool | |
1192 | needs_comp_plt() const | |
1193 | { return this->needs_comp_plt_; } | |
1194 | ||
1195 | // Set whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry. | |
1196 | void | |
1197 | set_needs_comp_plt(bool needs_comp_plt) | |
1198 | { this->needs_comp_plt_ = needs_comp_plt; } | |
1199 | ||
1200 | // Return standard PLT entry offset, or -1 if none. | |
1201 | unsigned int | |
1202 | mips_plt_offset() const | |
1203 | { return this->mips_plt_offset_; } | |
1204 | ||
1205 | // Set standard PLT entry offset. | |
1206 | void | |
1207 | set_mips_plt_offset(unsigned int mips_plt_offset) | |
1208 | { this->mips_plt_offset_ = mips_plt_offset; } | |
1209 | ||
1210 | // Return whether the symbol has standard PLT entry. | |
1211 | bool | |
1212 | has_mips_plt_offset() const | |
1213 | { return this->mips_plt_offset_ != -1U; } | |
1214 | ||
1215 | // Return compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none. | |
1216 | unsigned int | |
1217 | comp_plt_offset() const | |
1218 | { return this->comp_plt_offset_; } | |
1219 | ||
1220 | // Set compressed (MIPS16 or microMIPS) PLT entry offset. | |
1221 | void | |
1222 | set_comp_plt_offset(unsigned int comp_plt_offset) | |
1223 | { this->comp_plt_offset_ = comp_plt_offset; } | |
1224 | ||
1225 | // Return whether the symbol has compressed (MIPS16 or microMIPS) PLT entry. | |
1226 | bool | |
1227 | has_comp_plt_offset() const | |
1228 | { return this->comp_plt_offset_ != -1U; } | |
1229 | ||
1230 | // Return MIPS16 fn stub for a symbol. | |
1231 | template<bool big_endian> | |
1232 | Mips16_stub_section<size, big_endian>* | |
1233 | get_mips16_fn_stub() const | |
1234 | { | |
1235 | return static_cast<Mips16_stub_section<size, big_endian>*>(mips16_fn_stub_); | |
1236 | } | |
1237 | ||
1238 | // Set MIPS16 fn stub for a symbol. | |
1239 | void | |
1240 | set_mips16_fn_stub(Mips16_stub_section_base* stub) | |
1241 | { this->mips16_fn_stub_ = stub; } | |
1242 | ||
1243 | // Return whether symbol has MIPS16 fn stub. | |
1244 | bool | |
1245 | has_mips16_fn_stub() const | |
1246 | { return this->mips16_fn_stub_ != NULL; } | |
1247 | ||
1248 | // Return MIPS16 call stub for a symbol. | |
1249 | template<bool big_endian> | |
1250 | Mips16_stub_section<size, big_endian>* | |
1251 | get_mips16_call_stub() const | |
1252 | { | |
1253 | return static_cast<Mips16_stub_section<size, big_endian>*>( | |
1254 | mips16_call_stub_); | |
1255 | } | |
1256 | ||
1257 | // Set MIPS16 call stub for a symbol. | |
1258 | void | |
1259 | set_mips16_call_stub(Mips16_stub_section_base* stub) | |
1260 | { this->mips16_call_stub_ = stub; } | |
1261 | ||
1262 | // Return whether symbol has MIPS16 call stub. | |
1263 | bool | |
1264 | has_mips16_call_stub() const | |
1265 | { return this->mips16_call_stub_ != NULL; } | |
1266 | ||
1267 | // Return MIPS16 call_fp stub for a symbol. | |
1268 | template<bool big_endian> | |
1269 | Mips16_stub_section<size, big_endian>* | |
1270 | get_mips16_call_fp_stub() const | |
1271 | { | |
1272 | return static_cast<Mips16_stub_section<size, big_endian>*>( | |
1273 | mips16_call_fp_stub_); | |
1274 | } | |
1275 | ||
1276 | // Set MIPS16 call_fp stub for a symbol. | |
1277 | void | |
1278 | set_mips16_call_fp_stub(Mips16_stub_section_base* stub) | |
1279 | { this->mips16_call_fp_stub_ = stub; } | |
1280 | ||
1281 | // Return whether symbol has MIPS16 call_fp stub. | |
1282 | bool | |
1283 | has_mips16_call_fp_stub() const | |
1284 | { return this->mips16_call_fp_stub_ != NULL; } | |
1285 | ||
1286 | bool | |
1287 | get_applied_secondary_got_fixup() const | |
1288 | { return applied_secondary_got_fixup_; } | |
1289 | ||
1290 | void | |
1291 | set_applied_secondary_got_fixup() | |
1292 | { this->applied_secondary_got_fixup_ = true; } | |
1293 | ||
15eb1beb VR |
1294 | // Return the hash of this symbol. |
1295 | size_t | |
1296 | hash() const | |
1297 | { | |
1298 | return gold::string_hash<char>(this->name()); | |
1299 | } | |
1300 | ||
9810d34d SS |
1301 | private: |
1302 | // Whether the symbol needs MIPS16 fn_stub. This is true if this symbol | |
1303 | // appears in any relocs other than a 16 bit call. | |
1304 | bool need_fn_stub_; | |
1305 | ||
1306 | // True if this symbol is referenced by branch relocations from | |
1307 | // any non-PIC input file. This is used to determine whether an | |
1308 | // la25 stub is required. | |
1309 | bool has_nonpic_branches_; | |
1310 | ||
1311 | // The offset of the la25 stub for this symbol from the start of the | |
1312 | // la25 stub section. | |
1313 | unsigned int la25_stub_offset_; | |
1314 | ||
1315 | // True if there is a relocation against this symbol that must be | |
1316 | // resolved by the static linker (that is, the relocation cannot | |
1317 | // possibly be made dynamic). | |
1318 | bool has_static_relocs_; | |
1319 | ||
1320 | // Whether we must not create a lazy-binding stub for this symbol. | |
1321 | // This is true if the symbol has relocations related to taking the | |
1322 | // function's address. | |
1323 | bool no_lazy_stub_; | |
1324 | ||
1325 | // The offset of the lazy-binding stub for this symbol from the start of | |
1326 | // .MIPS.stubs section. | |
1327 | unsigned int lazy_stub_offset_; | |
1328 | ||
1329 | // True if there are any relocations for this symbol where pointer equality | |
1330 | // matters. | |
1331 | bool pointer_equality_needed_; | |
1332 | ||
1333 | // Global GOT area where this symbol in located, or GGA_NONE if symbol is not | |
1334 | // in the global part of the GOT. | |
1335 | Global_got_area global_got_area_; | |
1336 | ||
1337 | // The global GOT offset for this symbol. For multi-GOT links, this is offset | |
1338 | // from the start of .got section to the first GOT entry for the symbol. | |
1339 | // Note that in multi-GOT links the symbol can have entry in more than one GOT. | |
1340 | unsigned int global_gotoffset_; | |
1341 | ||
1342 | // Whether all GOT relocations for this symbol are for calls. | |
1343 | bool got_only_for_calls_; | |
1344 | // Whether the symbol has lazy-binding stub. | |
1345 | bool has_lazy_stub_; | |
1346 | // Whether the symbol needs a standard PLT entry. | |
1347 | bool needs_mips_plt_; | |
1348 | // Whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry. | |
1349 | bool needs_comp_plt_; | |
1350 | // Standard PLT entry offset, or -1 if none. | |
1351 | unsigned int mips_plt_offset_; | |
1352 | // Compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none. | |
1353 | unsigned int comp_plt_offset_; | |
1354 | // MIPS16 fn stub for a symbol. | |
1355 | Mips16_stub_section_base* mips16_fn_stub_; | |
1356 | // MIPS16 call stub for a symbol. | |
1357 | Mips16_stub_section_base* mips16_call_stub_; | |
1358 | // MIPS16 call_fp stub for a symbol. | |
1359 | Mips16_stub_section_base* mips16_call_fp_stub_; | |
1360 | ||
1361 | bool applied_secondary_got_fixup_; | |
1362 | }; | |
1363 | ||
1364 | // Mips16_stub_section class. | |
1365 | ||
1366 | // The mips16 compiler uses a couple of special sections to handle | |
1367 | // floating point arguments. | |
1368 | ||
1369 | // Section names that look like .mips16.fn.FNNAME contain stubs that | |
1370 | // copy floating point arguments from the fp regs to the gp regs and | |
1371 | // then jump to FNNAME. If any 32 bit function calls FNNAME, the | |
1372 | // call should be redirected to the stub instead. If no 32 bit | |
1373 | // function calls FNNAME, the stub should be discarded. We need to | |
1374 | // consider any reference to the function, not just a call, because | |
1375 | // if the address of the function is taken we will need the stub, | |
1376 | // since the address might be passed to a 32 bit function. | |
1377 | ||
1378 | // Section names that look like .mips16.call.FNNAME contain stubs | |
1379 | // that copy floating point arguments from the gp regs to the fp | |
1380 | // regs and then jump to FNNAME. If FNNAME is a 32 bit function, | |
1381 | // then any 16 bit function that calls FNNAME should be redirected | |
1382 | // to the stub instead. If FNNAME is not a 32 bit function, the | |
1383 | // stub should be discarded. | |
1384 | ||
1385 | // .mips16.call.fp.FNNAME sections are similar, but contain stubs | |
1386 | // which call FNNAME and then copy the return value from the fp regs | |
1387 | // to the gp regs. These stubs store the return address in $18 while | |
1388 | // calling FNNAME; any function which might call one of these stubs | |
1389 | // must arrange to save $18 around the call. (This case is not | |
1390 | // needed for 32 bit functions that call 16 bit functions, because | |
1391 | // 16 bit functions always return floating point values in both | |
1392 | // $f0/$f1 and $2/$3.) | |
1393 | ||
1394 | // Note that in all cases FNNAME might be defined statically. | |
1395 | // Therefore, FNNAME is not used literally. Instead, the relocation | |
1396 | // information will indicate which symbol the section is for. | |
1397 | ||
1398 | // We record any stubs that we find in the symbol table. | |
1399 | ||
1400 | // TODO(sasa): All mips16 stub sections should be emitted in the .text section. | |
1401 | ||
1402 | class Mips16_stub_section_base { }; | |
1403 | ||
1404 | template<int size, bool big_endian> | |
1405 | class Mips16_stub_section : public Mips16_stub_section_base | |
1406 | { | |
1407 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
1408 | ||
1409 | public: | |
1410 | Mips16_stub_section(Mips_relobj<size, big_endian>* object, unsigned int shndx) | |
1411 | : object_(object), shndx_(shndx), r_sym_(0), gsym_(NULL), | |
1412 | found_r_mips_none_(false) | |
1413 | { | |
1414 | gold_assert(object->is_mips16_fn_stub_section(shndx) | |
1415 | || object->is_mips16_call_stub_section(shndx) | |
1416 | || object->is_mips16_call_fp_stub_section(shndx)); | |
1417 | } | |
1418 | ||
1419 | // Return the object of this stub section. | |
1420 | Mips_relobj<size, big_endian>* | |
1421 | object() const | |
1422 | { return this->object_; } | |
1423 | ||
1424 | // Return the size of a section. | |
1425 | uint64_t | |
1426 | section_size() const | |
1427 | { return this->object_->section_size(this->shndx_); } | |
1428 | ||
1429 | // Return section index of this stub section. | |
1430 | unsigned int | |
1431 | shndx() const | |
1432 | { return this->shndx_; } | |
1433 | ||
1434 | // Return symbol index, if stub is for a local function. | |
1435 | unsigned int | |
1436 | r_sym() const | |
1437 | { return this->r_sym_; } | |
1438 | ||
1439 | // Return symbol, if stub is for a global function. | |
1440 | Mips_symbol<size>* | |
1441 | gsym() const | |
1442 | { return this->gsym_; } | |
1443 | ||
1444 | // Return whether stub is for a local function. | |
1445 | bool | |
1446 | is_for_local_function() const | |
1447 | { return this->gsym_ == NULL; } | |
1448 | ||
1449 | // This method is called when a new relocation R_TYPE for local symbol R_SYM | |
1450 | // is found in the stub section. Try to find stub target. | |
1451 | void | |
1452 | new_local_reloc_found(unsigned int r_type, unsigned int r_sym) | |
1453 | { | |
1454 | // To find target symbol for this stub, trust the first R_MIPS_NONE | |
1455 | // relocation, if any. Otherwise trust the first relocation, whatever | |
1456 | // its kind. | |
1457 | if (this->found_r_mips_none_) | |
1458 | return; | |
1459 | if (r_type == elfcpp::R_MIPS_NONE) | |
1460 | { | |
1461 | this->r_sym_ = r_sym; | |
1462 | this->gsym_ = NULL; | |
1463 | this->found_r_mips_none_ = true; | |
1464 | } | |
1465 | else if (!is_target_found()) | |
1466 | this->r_sym_ = r_sym; | |
1467 | } | |
1468 | ||
1469 | // This method is called when a new relocation R_TYPE for global symbol GSYM | |
1470 | // is found in the stub section. Try to find stub target. | |
1471 | void | |
1472 | new_global_reloc_found(unsigned int r_type, Mips_symbol<size>* gsym) | |
1473 | { | |
1474 | // To find target symbol for this stub, trust the first R_MIPS_NONE | |
1475 | // relocation, if any. Otherwise trust the first relocation, whatever | |
1476 | // its kind. | |
1477 | if (this->found_r_mips_none_) | |
1478 | return; | |
1479 | if (r_type == elfcpp::R_MIPS_NONE) | |
1480 | { | |
1481 | this->gsym_ = gsym; | |
1482 | this->r_sym_ = 0; | |
1483 | this->found_r_mips_none_ = true; | |
1484 | } | |
1485 | else if (!is_target_found()) | |
1486 | this->gsym_ = gsym; | |
1487 | } | |
1488 | ||
1489 | // Return whether we found the stub target. | |
1490 | bool | |
1491 | is_target_found() const | |
1492 | { return this->r_sym_ != 0 || this->gsym_ != NULL; } | |
1493 | ||
1494 | // Return whether this is a fn stub. | |
1495 | bool | |
1496 | is_fn_stub() const | |
1497 | { return this->object_->is_mips16_fn_stub_section(this->shndx_); } | |
1498 | ||
1499 | // Return whether this is a call stub. | |
1500 | bool | |
1501 | is_call_stub() const | |
1502 | { return this->object_->is_mips16_call_stub_section(this->shndx_); } | |
1503 | ||
1504 | // Return whether this is a call_fp stub. | |
1505 | bool | |
1506 | is_call_fp_stub() const | |
1507 | { return this->object_->is_mips16_call_fp_stub_section(this->shndx_); } | |
1508 | ||
1509 | // Return the output address. | |
1510 | Mips_address | |
1511 | output_address() const | |
1512 | { | |
1513 | return (this->object_->output_section(this->shndx_)->address() | |
1514 | + this->object_->output_section_offset(this->shndx_)); | |
1515 | } | |
1516 | ||
1517 | private: | |
1518 | // The object of this stub section. | |
1519 | Mips_relobj<size, big_endian>* object_; | |
1520 | // The section index of this stub section. | |
1521 | unsigned int shndx_; | |
1522 | // The symbol index, if stub is for a local function. | |
1523 | unsigned int r_sym_; | |
1524 | // The symbol, if stub is for a global function. | |
1525 | Mips_symbol<size>* gsym_; | |
1526 | // True if we found R_MIPS_NONE relocation in this stub. | |
1527 | bool found_r_mips_none_; | |
1528 | }; | |
1529 | ||
1530 | // Mips_relobj class. | |
1531 | ||
1532 | template<int size, bool big_endian> | |
1533 | class Mips_relobj : public Sized_relobj_file<size, big_endian> | |
1534 | { | |
1535 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
1536 | typedef std::map<unsigned int, Mips16_stub_section<size, big_endian>*> | |
1537 | Mips16_stubs_int_map; | |
1538 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
1539 | ||
1540 | public: | |
1541 | Mips_relobj(const std::string& name, Input_file* input_file, off_t offset, | |
1542 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
1543 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
1544 | processor_specific_flags_(0), local_symbol_is_mips16_(), | |
1545 | local_symbol_is_micromips_(), mips16_stub_sections_(), | |
1546 | local_non_16bit_calls_(), local_16bit_calls_(), local_mips16_fn_stubs_(), | |
1547 | local_mips16_call_stubs_(), gp_(0), got_info_(NULL), | |
1548 | section_is_mips16_fn_stub_(), section_is_mips16_call_stub_(), | |
1549 | section_is_mips16_call_fp_stub_(), pdr_shndx_(-1U), gprmask_(0), | |
1550 | cprmask1_(0), cprmask2_(0), cprmask3_(0), cprmask4_(0) | |
1551 | { | |
1552 | this->is_pic_ = (ehdr.get_e_flags() & elfcpp::EF_MIPS_PIC) != 0; | |
1553 | this->is_n32_ = elfcpp::abi_n32(ehdr.get_e_flags()); | |
9810d34d SS |
1554 | } |
1555 | ||
1556 | ~Mips_relobj() | |
1557 | { } | |
1558 | ||
1559 | // Downcast a base pointer to a Mips_relobj pointer. This is | |
1560 | // not type-safe but we only use Mips_relobj not the base class. | |
1561 | static Mips_relobj<size, big_endian>* | |
1562 | as_mips_relobj(Relobj* relobj) | |
1563 | { return static_cast<Mips_relobj<size, big_endian>*>(relobj); } | |
1564 | ||
1565 | // Downcast a base pointer to a Mips_relobj pointer. This is | |
1566 | // not type-safe but we only use Mips_relobj not the base class. | |
1567 | static const Mips_relobj<size, big_endian>* | |
1568 | as_mips_relobj(const Relobj* relobj) | |
1569 | { return static_cast<const Mips_relobj<size, big_endian>*>(relobj); } | |
1570 | ||
1571 | // Processor-specific flags in ELF file header. This is valid only after | |
1572 | // reading symbols. | |
1573 | elfcpp::Elf_Word | |
1574 | processor_specific_flags() const | |
1575 | { return this->processor_specific_flags_; } | |
1576 | ||
1577 | // Whether a local symbol is MIPS16 symbol. R_SYM is the symbol table | |
1578 | // index. This is only valid after do_count_local_symbol is called. | |
1579 | bool | |
1580 | local_symbol_is_mips16(unsigned int r_sym) const | |
1581 | { | |
1582 | gold_assert(r_sym < this->local_symbol_is_mips16_.size()); | |
1583 | return this->local_symbol_is_mips16_[r_sym]; | |
1584 | } | |
1585 | ||
1586 | // Whether a local symbol is microMIPS symbol. R_SYM is the symbol table | |
1587 | // index. This is only valid after do_count_local_symbol is called. | |
1588 | bool | |
1589 | local_symbol_is_micromips(unsigned int r_sym) const | |
1590 | { | |
1591 | gold_assert(r_sym < this->local_symbol_is_micromips_.size()); | |
1592 | return this->local_symbol_is_micromips_[r_sym]; | |
1593 | } | |
1594 | ||
1595 | // Get or create MIPS16 stub section. | |
1596 | Mips16_stub_section<size, big_endian>* | |
1597 | get_mips16_stub_section(unsigned int shndx) | |
1598 | { | |
1599 | typename Mips16_stubs_int_map::const_iterator it = | |
1600 | this->mips16_stub_sections_.find(shndx); | |
1601 | if (it != this->mips16_stub_sections_.end()) | |
1602 | return (*it).second; | |
1603 | ||
1604 | Mips16_stub_section<size, big_endian>* stub_section = | |
1605 | new Mips16_stub_section<size, big_endian>(this, shndx); | |
1606 | this->mips16_stub_sections_.insert( | |
1607 | std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>( | |
1608 | stub_section->shndx(), stub_section)); | |
1609 | return stub_section; | |
1610 | } | |
1611 | ||
1612 | // Return MIPS16 fn stub section for local symbol R_SYM, or NULL if this | |
1613 | // object doesn't have fn stub for R_SYM. | |
1614 | Mips16_stub_section<size, big_endian>* | |
1615 | get_local_mips16_fn_stub(unsigned int r_sym) const | |
1616 | { | |
1617 | typename Mips16_stubs_int_map::const_iterator it = | |
1618 | this->local_mips16_fn_stubs_.find(r_sym); | |
1619 | if (it != this->local_mips16_fn_stubs_.end()) | |
1620 | return (*it).second; | |
1621 | return NULL; | |
1622 | } | |
1623 | ||
1624 | // Record that this object has MIPS16 fn stub for local symbol. This method | |
1625 | // is only called if we decided not to discard the stub. | |
1626 | void | |
1627 | add_local_mips16_fn_stub(Mips16_stub_section<size, big_endian>* stub) | |
1628 | { | |
1629 | gold_assert(stub->is_for_local_function()); | |
1630 | unsigned int r_sym = stub->r_sym(); | |
1631 | this->local_mips16_fn_stubs_.insert( | |
1632 | std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>( | |
1633 | r_sym, stub)); | |
1634 | } | |
1635 | ||
1636 | // Return MIPS16 call stub section for local symbol R_SYM, or NULL if this | |
1637 | // object doesn't have call stub for R_SYM. | |
1638 | Mips16_stub_section<size, big_endian>* | |
1639 | get_local_mips16_call_stub(unsigned int r_sym) const | |
1640 | { | |
1641 | typename Mips16_stubs_int_map::const_iterator it = | |
1642 | this->local_mips16_call_stubs_.find(r_sym); | |
1643 | if (it != this->local_mips16_call_stubs_.end()) | |
1644 | return (*it).second; | |
1645 | return NULL; | |
1646 | } | |
1647 | ||
1648 | // Record that this object has MIPS16 call stub for local symbol. This method | |
1649 | // is only called if we decided not to discard the stub. | |
1650 | void | |
1651 | add_local_mips16_call_stub(Mips16_stub_section<size, big_endian>* stub) | |
1652 | { | |
1653 | gold_assert(stub->is_for_local_function()); | |
1654 | unsigned int r_sym = stub->r_sym(); | |
1655 | this->local_mips16_call_stubs_.insert( | |
1656 | std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>( | |
1657 | r_sym, stub)); | |
1658 | } | |
1659 | ||
1660 | // Record that we found "non 16-bit" call relocation against local symbol | |
1661 | // SYMNDX. This reloc would need to refer to a MIPS16 fn stub, if there | |
1662 | // is one. | |
1663 | void | |
1664 | add_local_non_16bit_call(unsigned int symndx) | |
1665 | { this->local_non_16bit_calls_.insert(symndx); } | |
1666 | ||
1667 | // Return true if there is any "non 16-bit" call relocation against local | |
1668 | // symbol SYMNDX in this object. | |
1669 | bool | |
1670 | has_local_non_16bit_call_relocs(unsigned int symndx) | |
1671 | { | |
1672 | return (this->local_non_16bit_calls_.find(symndx) | |
1673 | != this->local_non_16bit_calls_.end()); | |
1674 | } | |
1675 | ||
1676 | // Record that we found 16-bit call relocation R_MIPS16_26 against local | |
1677 | // symbol SYMNDX. Local MIPS16 call or call_fp stubs will only be needed | |
1678 | // if there is some R_MIPS16_26 relocation that refers to the stub symbol. | |
1679 | void | |
1680 | add_local_16bit_call(unsigned int symndx) | |
1681 | { this->local_16bit_calls_.insert(symndx); } | |
1682 | ||
1683 | // Return true if there is any 16-bit call relocation R_MIPS16_26 against local | |
1684 | // symbol SYMNDX in this object. | |
1685 | bool | |
1686 | has_local_16bit_call_relocs(unsigned int symndx) | |
1687 | { | |
1688 | return (this->local_16bit_calls_.find(symndx) | |
1689 | != this->local_16bit_calls_.end()); | |
1690 | } | |
1691 | ||
1692 | // Get gp value that was used to create this object. | |
1693 | Mips_address | |
1694 | gp_value() const | |
1695 | { return this->gp_; } | |
1696 | ||
1697 | // Return whether the object is a PIC object. | |
1698 | bool | |
1699 | is_pic() const | |
1700 | { return this->is_pic_; } | |
1701 | ||
1702 | // Return whether the object uses N32 ABI. | |
1703 | bool | |
1704 | is_n32() const | |
1705 | { return this->is_n32_; } | |
1706 | ||
1707 | // Return whether the object uses N64 ABI. | |
1708 | bool | |
1709 | is_n64() const | |
01b84e25 | 1710 | { return size == 64; } |
9810d34d SS |
1711 | |
1712 | // Return whether the object uses NewABI conventions. | |
1713 | bool | |
1714 | is_newabi() const | |
01b84e25 | 1715 | { return this->is_n32() || this->is_n64(); } |
9810d34d SS |
1716 | |
1717 | // Return Mips_got_info for this object. | |
1718 | Mips_got_info<size, big_endian>* | |
1719 | get_got_info() const | |
1720 | { return this->got_info_; } | |
1721 | ||
1722 | // Return Mips_got_info for this object. Create new info if it doesn't exist. | |
1723 | Mips_got_info<size, big_endian>* | |
1724 | get_or_create_got_info() | |
1725 | { | |
1726 | if (!this->got_info_) | |
1727 | this->got_info_ = new Mips_got_info<size, big_endian>(); | |
1728 | return this->got_info_; | |
1729 | } | |
1730 | ||
1731 | // Set Mips_got_info for this object. | |
1732 | void | |
1733 | set_got_info(Mips_got_info<size, big_endian>* got_info) | |
1734 | { this->got_info_ = got_info; } | |
1735 | ||
1736 | // Whether a section SHDNX is a MIPS16 stub section. This is only valid | |
1737 | // after do_read_symbols is called. | |
1738 | bool | |
1739 | is_mips16_stub_section(unsigned int shndx) | |
1740 | { | |
1741 | return (is_mips16_fn_stub_section(shndx) | |
1742 | || is_mips16_call_stub_section(shndx) | |
1743 | || is_mips16_call_fp_stub_section(shndx)); | |
1744 | } | |
1745 | ||
1746 | // Return TRUE if relocations in section SHNDX can refer directly to a | |
1747 | // MIPS16 function rather than to a hard-float stub. This is only valid | |
1748 | // after do_read_symbols is called. | |
1749 | bool | |
1750 | section_allows_mips16_refs(unsigned int shndx) | |
1751 | { | |
1752 | return (this->is_mips16_stub_section(shndx) || shndx == this->pdr_shndx_); | |
1753 | } | |
1754 | ||
1755 | // Whether a section SHDNX is a MIPS16 fn stub section. This is only valid | |
1756 | // after do_read_symbols is called. | |
1757 | bool | |
1758 | is_mips16_fn_stub_section(unsigned int shndx) | |
1759 | { | |
1760 | gold_assert(shndx < this->section_is_mips16_fn_stub_.size()); | |
1761 | return this->section_is_mips16_fn_stub_[shndx]; | |
1762 | } | |
1763 | ||
1764 | // Whether a section SHDNX is a MIPS16 call stub section. This is only valid | |
1765 | // after do_read_symbols is called. | |
1766 | bool | |
1767 | is_mips16_call_stub_section(unsigned int shndx) | |
1768 | { | |
1769 | gold_assert(shndx < this->section_is_mips16_call_stub_.size()); | |
1770 | return this->section_is_mips16_call_stub_[shndx]; | |
1771 | } | |
1772 | ||
1773 | // Whether a section SHDNX is a MIPS16 call_fp stub section. This is only | |
1774 | // valid after do_read_symbols is called. | |
1775 | bool | |
1776 | is_mips16_call_fp_stub_section(unsigned int shndx) | |
1777 | { | |
1778 | gold_assert(shndx < this->section_is_mips16_call_fp_stub_.size()); | |
1779 | return this->section_is_mips16_call_fp_stub_[shndx]; | |
1780 | } | |
1781 | ||
1782 | // Discard MIPS16 stub secions that are not needed. | |
1783 | void | |
1784 | discard_mips16_stub_sections(Symbol_table* symtab); | |
1785 | ||
1786 | // Return gprmask from the .reginfo section of this object. | |
1787 | Valtype | |
1788 | gprmask() const | |
1789 | { return this->gprmask_; } | |
1790 | ||
1791 | // Return cprmask1 from the .reginfo section of this object. | |
1792 | Valtype | |
1793 | cprmask1() const | |
1794 | { return this->cprmask1_; } | |
1795 | ||
1796 | // Return cprmask2 from the .reginfo section of this object. | |
1797 | Valtype | |
1798 | cprmask2() const | |
1799 | { return this->cprmask2_; } | |
1800 | ||
1801 | // Return cprmask3 from the .reginfo section of this object. | |
1802 | Valtype | |
1803 | cprmask3() const | |
1804 | { return this->cprmask3_; } | |
1805 | ||
1806 | // Return cprmask4 from the .reginfo section of this object. | |
1807 | Valtype | |
1808 | cprmask4() const | |
1809 | { return this->cprmask4_; } | |
1810 | ||
1811 | protected: | |
1812 | // Count the local symbols. | |
1813 | void | |
1814 | do_count_local_symbols(Stringpool_template<char>*, | |
1815 | Stringpool_template<char>*); | |
1816 | ||
1817 | // Read the symbol information. | |
1818 | void | |
1819 | do_read_symbols(Read_symbols_data* sd); | |
1820 | ||
1821 | private: | |
47a9f4fc VR |
1822 | // The name of the options section. |
1823 | const char* mips_elf_options_section_name() | |
1824 | { return this->is_newabi() ? ".MIPS.options" : ".options"; } | |
1825 | ||
9810d34d SS |
1826 | // processor-specific flags in ELF file header. |
1827 | elfcpp::Elf_Word processor_specific_flags_; | |
1828 | ||
1829 | // Bit vector to tell if a local symbol is a MIPS16 symbol or not. | |
1830 | // This is only valid after do_count_local_symbol is called. | |
1831 | std::vector<bool> local_symbol_is_mips16_; | |
1832 | ||
1833 | // Bit vector to tell if a local symbol is a microMIPS symbol or not. | |
1834 | // This is only valid after do_count_local_symbol is called. | |
1835 | std::vector<bool> local_symbol_is_micromips_; | |
1836 | ||
1837 | // Map from section index to the MIPS16 stub for that section. This contains | |
1838 | // all stubs found in this object. | |
1839 | Mips16_stubs_int_map mips16_stub_sections_; | |
1840 | ||
1841 | // Local symbols that have "non 16-bit" call relocation. This relocation | |
1842 | // would need to refer to a MIPS16 fn stub, if there is one. | |
1843 | std::set<unsigned int> local_non_16bit_calls_; | |
1844 | ||
1845 | // Local symbols that have 16-bit call relocation R_MIPS16_26. Local MIPS16 | |
1846 | // call or call_fp stubs will only be needed if there is some R_MIPS16_26 | |
1847 | // relocation that refers to the stub symbol. | |
1848 | std::set<unsigned int> local_16bit_calls_; | |
1849 | ||
1850 | // Map from local symbol index to the MIPS16 fn stub for that symbol. | |
1851 | // This contains only the stubs that we decided not to discard. | |
1852 | Mips16_stubs_int_map local_mips16_fn_stubs_; | |
1853 | ||
1854 | // Map from local symbol index to the MIPS16 call stub for that symbol. | |
1855 | // This contains only the stubs that we decided not to discard. | |
1856 | Mips16_stubs_int_map local_mips16_call_stubs_; | |
1857 | ||
1858 | // gp value that was used to create this object. | |
1859 | Mips_address gp_; | |
1860 | // Whether the object is a PIC object. | |
1861 | bool is_pic_ : 1; | |
1862 | // Whether the object uses N32 ABI. | |
1863 | bool is_n32_ : 1; | |
9810d34d SS |
1864 | // The Mips_got_info for this object. |
1865 | Mips_got_info<size, big_endian>* got_info_; | |
1866 | ||
1867 | // Bit vector to tell if a section is a MIPS16 fn stub section or not. | |
1868 | // This is only valid after do_read_symbols is called. | |
1869 | std::vector<bool> section_is_mips16_fn_stub_; | |
1870 | ||
1871 | // Bit vector to tell if a section is a MIPS16 call stub section or not. | |
1872 | // This is only valid after do_read_symbols is called. | |
1873 | std::vector<bool> section_is_mips16_call_stub_; | |
1874 | ||
1875 | // Bit vector to tell if a section is a MIPS16 call_fp stub section or not. | |
1876 | // This is only valid after do_read_symbols is called. | |
1877 | std::vector<bool> section_is_mips16_call_fp_stub_; | |
1878 | ||
1879 | // .pdr section index. | |
1880 | unsigned int pdr_shndx_; | |
1881 | ||
1882 | // gprmask from the .reginfo section of this object. | |
1883 | Valtype gprmask_; | |
1884 | // cprmask1 from the .reginfo section of this object. | |
1885 | Valtype cprmask1_; | |
1886 | // cprmask2 from the .reginfo section of this object. | |
1887 | Valtype cprmask2_; | |
1888 | // cprmask3 from the .reginfo section of this object. | |
1889 | Valtype cprmask3_; | |
1890 | // cprmask4 from the .reginfo section of this object. | |
1891 | Valtype cprmask4_; | |
1892 | }; | |
1893 | ||
1894 | // Mips_output_data_got class. | |
1895 | ||
1896 | template<int size, bool big_endian> | |
1897 | class Mips_output_data_got : public Output_data_got<size, big_endian> | |
1898 | { | |
1899 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
1900 | typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> | |
1901 | Reloc_section; | |
1902 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
1903 | ||
1904 | public: | |
1905 | Mips_output_data_got(Target_mips<size, big_endian>* target, | |
1906 | Symbol_table* symtab, Layout* layout) | |
1907 | : Output_data_got<size, big_endian>(), target_(target), | |
1908 | symbol_table_(symtab), layout_(layout), static_relocs_(), got_view_(NULL), | |
1909 | first_global_got_dynsym_index_(-1U), primary_got_(NULL), | |
1910 | secondary_got_relocs_() | |
1911 | { | |
1912 | this->master_got_info_ = new Mips_got_info<size, big_endian>(); | |
1913 | this->set_addralign(16); | |
1914 | } | |
1915 | ||
1916 | // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol | |
1917 | // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT. | |
1918 | void | |
1919 | record_local_got_symbol(Mips_relobj<size, big_endian>* object, | |
1920 | unsigned int symndx, Mips_address addend, | |
47a9f4fc VR |
1921 | unsigned int r_type, unsigned int shndx, |
1922 | bool is_section_symbol) | |
9810d34d SS |
1923 | { |
1924 | this->master_got_info_->record_local_got_symbol(object, symndx, addend, | |
47a9f4fc VR |
1925 | r_type, shndx, |
1926 | is_section_symbol); | |
9810d34d SS |
1927 | } |
1928 | ||
1929 | // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM, | |
1930 | // in OBJECT. FOR_CALL is true if the caller is only interested in | |
1931 | // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic | |
1932 | // relocation. | |
1933 | void | |
1934 | record_global_got_symbol(Mips_symbol<size>* mips_sym, | |
1935 | Mips_relobj<size, big_endian>* object, | |
1936 | unsigned int r_type, bool dyn_reloc, bool for_call) | |
1937 | { | |
1938 | this->master_got_info_->record_global_got_symbol(mips_sym, object, r_type, | |
1939 | dyn_reloc, for_call); | |
1940 | } | |
1941 | ||
1942 | // Record that OBJECT has a page relocation against symbol SYMNDX and | |
1943 | // that ADDEND is the addend for that relocation. | |
1944 | void | |
1945 | record_got_page_entry(Mips_relobj<size, big_endian>* object, | |
1946 | unsigned int symndx, int addend) | |
1947 | { this->master_got_info_->record_got_page_entry(object, symndx, addend); } | |
1948 | ||
1949 | // Add a static entry for the GOT entry at OFFSET. GSYM is a global | |
1950 | // symbol and R_TYPE is the code of a dynamic relocation that needs to be | |
1951 | // applied in a static link. | |
1952 | void | |
1953 | add_static_reloc(unsigned int got_offset, unsigned int r_type, | |
1954 | Mips_symbol<size>* gsym) | |
1955 | { this->static_relocs_.push_back(Static_reloc(got_offset, r_type, gsym)); } | |
1956 | ||
1957 | // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object | |
1958 | // defining a local symbol with INDEX. R_TYPE is the code of a dynamic | |
1959 | // relocation that needs to be applied in a static link. | |
1960 | void | |
1961 | add_static_reloc(unsigned int got_offset, unsigned int r_type, | |
1962 | Sized_relobj_file<size, big_endian>* relobj, | |
1963 | unsigned int index) | |
1964 | { | |
1965 | this->static_relocs_.push_back(Static_reloc(got_offset, r_type, relobj, | |
1966 | index)); | |
1967 | } | |
1968 | ||
1969 | // Record that global symbol GSYM has R_TYPE dynamic relocation in the | |
1970 | // secondary GOT at OFFSET. | |
1971 | void | |
1972 | add_secondary_got_reloc(unsigned int got_offset, unsigned int r_type, | |
1973 | Mips_symbol<size>* gsym) | |
1974 | { | |
1975 | this->secondary_got_relocs_.push_back(Static_reloc(got_offset, | |
1976 | r_type, gsym)); | |
1977 | } | |
1978 | ||
1979 | // Update GOT entry at OFFSET with VALUE. | |
1980 | void | |
1981 | update_got_entry(unsigned int offset, Mips_address value) | |
1982 | { | |
1983 | elfcpp::Swap<size, big_endian>::writeval(this->got_view_ + offset, value); | |
1984 | } | |
1985 | ||
1986 | // Return the number of entries in local part of the GOT. This includes | |
1987 | // local entries, page entries and 2 reserved entries. | |
1988 | unsigned int | |
1989 | get_local_gotno() const | |
1990 | { | |
1991 | if (!this->multi_got()) | |
1992 | { | |
1993 | return (2 + this->master_got_info_->local_gotno() | |
1994 | + this->master_got_info_->page_gotno()); | |
1995 | } | |
1996 | else | |
1997 | return 2 + this->primary_got_->local_gotno() + this->primary_got_->page_gotno(); | |
1998 | } | |
1999 | ||
2000 | // Return dynamic symbol table index of the first symbol with global GOT | |
2001 | // entry. | |
2002 | unsigned int | |
2003 | first_global_got_dynsym_index() const | |
2004 | { return this->first_global_got_dynsym_index_; } | |
2005 | ||
2006 | // Set dynamic symbol table index of the first symbol with global GOT entry. | |
2007 | void | |
2008 | set_first_global_got_dynsym_index(unsigned int index) | |
2009 | { this->first_global_got_dynsym_index_ = index; } | |
2010 | ||
2011 | // Lay out the GOT. Add local, global and TLS entries. If GOT is | |
2012 | // larger than 64K, create multi-GOT. | |
2013 | void | |
2014 | lay_out_got(Layout* layout, Symbol_table* symtab, | |
2015 | const Input_objects* input_objects); | |
2016 | ||
2017 | // Create multi-GOT. For every GOT, add local, global and TLS entries. | |
2018 | void | |
2019 | lay_out_multi_got(Layout* layout, const Input_objects* input_objects); | |
2020 | ||
2021 | // Attempt to merge GOTs of different input objects. | |
2022 | void | |
2023 | merge_gots(const Input_objects* input_objects); | |
2024 | ||
2025 | // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if | |
2026 | // this would lead to overflow, true if they were merged successfully. | |
2027 | bool | |
2028 | merge_got_with(Mips_got_info<size, big_endian>* from, | |
2029 | Mips_relobj<size, big_endian>* object, | |
2030 | Mips_got_info<size, big_endian>* to); | |
2031 | ||
2032 | // Return the offset of GOT page entry for VALUE. For multi-GOT links, | |
2033 | // use OBJECT's GOT. | |
2034 | unsigned int | |
2035 | get_got_page_offset(Mips_address value, | |
2036 | const Mips_relobj<size, big_endian>* object) | |
2037 | { | |
2038 | Mips_got_info<size, big_endian>* g = (!this->multi_got() | |
2039 | ? this->master_got_info_ | |
2040 | : object->get_got_info()); | |
2041 | gold_assert(g != NULL); | |
2042 | return g->get_got_page_offset(value, this); | |
2043 | } | |
2044 | ||
2045 | // Return the GOT offset of type GOT_TYPE of the global symbol | |
2046 | // GSYM. For multi-GOT links, use OBJECT's GOT. | |
2047 | unsigned int got_offset(const Symbol* gsym, unsigned int got_type, | |
2048 | Mips_relobj<size, big_endian>* object) const | |
2049 | { | |
2050 | if (!this->multi_got()) | |
2051 | return gsym->got_offset(got_type); | |
2052 | else | |
2053 | { | |
2054 | Mips_got_info<size, big_endian>* g = object->get_got_info(); | |
2055 | gold_assert(g != NULL); | |
2056 | return gsym->got_offset(g->multigot_got_type(got_type)); | |
2057 | } | |
2058 | } | |
2059 | ||
2060 | // Return the GOT offset of type GOT_TYPE of the local symbol | |
2061 | // SYMNDX. | |
2062 | unsigned int | |
2063 | got_offset(unsigned int symndx, unsigned int got_type, | |
47a9f4fc VR |
2064 | Sized_relobj_file<size, big_endian>* object, |
2065 | uint64_t addend) const | |
2066 | { return object->local_got_offset(symndx, got_type, addend); } | |
9810d34d SS |
2067 | |
2068 | // Return the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT. | |
2069 | unsigned int | |
2070 | tls_ldm_offset(Mips_relobj<size, big_endian>* object) const | |
2071 | { | |
2072 | Mips_got_info<size, big_endian>* g = (!this->multi_got() | |
2073 | ? this->master_got_info_ | |
2074 | : object->get_got_info()); | |
2075 | gold_assert(g != NULL); | |
2076 | return g->tls_ldm_offset(); | |
2077 | } | |
2078 | ||
2079 | // Set the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT. | |
2080 | void | |
2081 | set_tls_ldm_offset(unsigned int tls_ldm_offset, | |
2082 | Mips_relobj<size, big_endian>* object) | |
2083 | { | |
2084 | Mips_got_info<size, big_endian>* g = (!this->multi_got() | |
2085 | ? this->master_got_info_ | |
2086 | : object->get_got_info()); | |
2087 | gold_assert(g != NULL); | |
2088 | g->set_tls_ldm_offset(tls_ldm_offset); | |
2089 | } | |
2090 | ||
2091 | // Return true for multi-GOT links. | |
2092 | bool | |
2093 | multi_got() const | |
2094 | { return this->primary_got_ != NULL; } | |
2095 | ||
2096 | // Return the offset of OBJECT's GOT from the start of .got section. | |
2097 | unsigned int | |
2098 | get_got_offset(const Mips_relobj<size, big_endian>* object) | |
2099 | { | |
2100 | if (!this->multi_got()) | |
2101 | return 0; | |
2102 | else | |
2103 | { | |
2104 | Mips_got_info<size, big_endian>* g = object->get_got_info(); | |
2105 | return g != NULL ? g->offset() : 0; | |
2106 | } | |
2107 | } | |
2108 | ||
2109 | // Create global GOT entries that should be in the GGA_RELOC_ONLY area. | |
2110 | void | |
2111 | add_reloc_only_entries() | |
2112 | { this->master_got_info_->add_reloc_only_entries(this); } | |
2113 | ||
2114 | // Return offset of the primary GOT's entry for global symbol. | |
2115 | unsigned int | |
2116 | get_primary_got_offset(const Mips_symbol<size>* sym) const | |
2117 | { | |
2118 | gold_assert(sym->global_got_area() != GGA_NONE); | |
2119 | return (this->get_local_gotno() + sym->dynsym_index() | |
2120 | - this->first_global_got_dynsym_index()) * size/8; | |
2121 | } | |
2122 | ||
2123 | // For the entry at offset GOT_OFFSET, return its offset from the gp. | |
2124 | // Input argument GOT_OFFSET is always global offset from the start of | |
2125 | // .got section, for both single and multi-GOT links. | |
2126 | // For single GOT links, this returns GOT_OFFSET - 0x7FF0. For multi-GOT | |
2127 | // links, the return value is object_got_offset - 0x7FF0, where | |
2128 | // object_got_offset is offset in the OBJECT's GOT. | |
2129 | int | |
2130 | gp_offset(unsigned int got_offset, | |
2131 | const Mips_relobj<size, big_endian>* object) const | |
2132 | { | |
2133 | return (this->address() + got_offset | |
2134 | - this->target_->adjusted_gp_value(object)); | |
2135 | } | |
2136 | ||
2137 | protected: | |
2138 | // Write out the GOT table. | |
2139 | void | |
2140 | do_write(Output_file*); | |
2141 | ||
2142 | private: | |
2143 | ||
2144 | // This class represent dynamic relocations that need to be applied by | |
2145 | // gold because we are using TLS relocations in a static link. | |
2146 | class Static_reloc | |
2147 | { | |
2148 | public: | |
2149 | Static_reloc(unsigned int got_offset, unsigned int r_type, | |
2150 | Mips_symbol<size>* gsym) | |
2151 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(true) | |
2152 | { this->u_.global.symbol = gsym; } | |
2153 | ||
2154 | Static_reloc(unsigned int got_offset, unsigned int r_type, | |
2155 | Sized_relobj_file<size, big_endian>* relobj, unsigned int index) | |
2156 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(false) | |
2157 | { | |
2158 | this->u_.local.relobj = relobj; | |
2159 | this->u_.local.index = index; | |
2160 | } | |
2161 | ||
2162 | // Return the GOT offset. | |
2163 | unsigned int | |
2164 | got_offset() const | |
2165 | { return this->got_offset_; } | |
2166 | ||
2167 | // Relocation type. | |
2168 | unsigned int | |
2169 | r_type() const | |
2170 | { return this->r_type_; } | |
2171 | ||
2172 | // Whether the symbol is global or not. | |
2173 | bool | |
2174 | symbol_is_global() const | |
2175 | { return this->symbol_is_global_; } | |
2176 | ||
2177 | // For a relocation against a global symbol, the global symbol. | |
2178 | Mips_symbol<size>* | |
2179 | symbol() const | |
2180 | { | |
2181 | gold_assert(this->symbol_is_global_); | |
2182 | return this->u_.global.symbol; | |
2183 | } | |
2184 | ||
2185 | // For a relocation against a local symbol, the defining object. | |
2186 | Sized_relobj_file<size, big_endian>* | |
2187 | relobj() const | |
2188 | { | |
2189 | gold_assert(!this->symbol_is_global_); | |
2190 | return this->u_.local.relobj; | |
2191 | } | |
2192 | ||
2193 | // For a relocation against a local symbol, the local symbol index. | |
2194 | unsigned int | |
2195 | index() const | |
2196 | { | |
2197 | gold_assert(!this->symbol_is_global_); | |
2198 | return this->u_.local.index; | |
2199 | } | |
2200 | ||
2201 | private: | |
2202 | // GOT offset of the entry to which this relocation is applied. | |
2203 | unsigned int got_offset_; | |
2204 | // Type of relocation. | |
2205 | unsigned int r_type_; | |
2206 | // Whether this relocation is against a global symbol. | |
2207 | bool symbol_is_global_; | |
2208 | // A global or local symbol. | |
2209 | union | |
2210 | { | |
2211 | struct | |
2212 | { | |
2213 | // For a global symbol, the symbol itself. | |
2214 | Mips_symbol<size>* symbol; | |
2215 | } global; | |
2216 | struct | |
2217 | { | |
2218 | // For a local symbol, the object defining object. | |
2219 | Sized_relobj_file<size, big_endian>* relobj; | |
2220 | // For a local symbol, the symbol index. | |
2221 | unsigned int index; | |
2222 | } local; | |
2223 | } u_; | |
2224 | }; | |
2225 | ||
2226 | // The target. | |
2227 | Target_mips<size, big_endian>* target_; | |
2228 | // The symbol table. | |
2229 | Symbol_table* symbol_table_; | |
2230 | // The layout. | |
2231 | Layout* layout_; | |
2232 | // Static relocs to be applied to the GOT. | |
2233 | std::vector<Static_reloc> static_relocs_; | |
2234 | // .got section view. | |
2235 | unsigned char* got_view_; | |
2236 | // The dynamic symbol table index of the first symbol with global GOT entry. | |
2237 | unsigned int first_global_got_dynsym_index_; | |
2238 | // The master GOT information. | |
2239 | Mips_got_info<size, big_endian>* master_got_info_; | |
2240 | // The primary GOT information. | |
2241 | Mips_got_info<size, big_endian>* primary_got_; | |
2242 | // Secondary GOT fixups. | |
2243 | std::vector<Static_reloc> secondary_got_relocs_; | |
2244 | }; | |
2245 | ||
2246 | // A class to handle LA25 stubs - non-PIC interface to a PIC function. There are | |
2247 | // two ways of creating these interfaces. The first is to add: | |
2248 | // | |
2249 | // lui $25,%hi(func) | |
2250 | // j func | |
2251 | // addiu $25,$25,%lo(func) | |
2252 | // | |
2253 | // to a separate trampoline section. The second is to add: | |
2254 | // | |
2255 | // lui $25,%hi(func) | |
2256 | // addiu $25,$25,%lo(func) | |
2257 | // | |
2258 | // immediately before a PIC function "func", but only if a function is at the | |
2259 | // beginning of the section, and the section is not too heavily aligned (i.e we | |
2260 | // would need to add no more than 2 nops before the stub.) | |
2261 | // | |
2262 | // We only create stubs of the first type. | |
2263 | ||
2264 | template<int size, bool big_endian> | |
2265 | class Mips_output_data_la25_stub : public Output_section_data | |
2266 | { | |
2267 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
2268 | ||
2269 | public: | |
2270 | Mips_output_data_la25_stub() | |
2271 | : Output_section_data(size == 32 ? 4 : 8), symbols_() | |
2272 | { } | |
2273 | ||
2274 | // Create LA25 stub for a symbol. | |
2275 | void | |
2276 | create_la25_stub(Symbol_table* symtab, Target_mips<size, big_endian>* target, | |
2277 | Mips_symbol<size>* gsym); | |
2278 | ||
2279 | // Return output address of a stub. | |
2280 | Mips_address | |
2281 | stub_address(const Mips_symbol<size>* sym) const | |
2282 | { | |
2283 | gold_assert(sym->has_la25_stub()); | |
2284 | return this->address() + sym->la25_stub_offset(); | |
2285 | } | |
2286 | ||
2287 | protected: | |
2288 | void | |
2289 | do_adjust_output_section(Output_section* os) | |
2290 | { os->set_entsize(0); } | |
2291 | ||
2292 | private: | |
2293 | // Template for standard LA25 stub. | |
2294 | static const uint32_t la25_stub_entry[]; | |
2295 | // Template for microMIPS LA25 stub. | |
2296 | static const uint32_t la25_stub_micromips_entry[]; | |
2297 | ||
2298 | // Set the final size. | |
2299 | void | |
2300 | set_final_data_size() | |
2301 | { this->set_data_size(this->symbols_.size() * 16); } | |
2302 | ||
2303 | // Create a symbol for SYM stub's value and size, to help make the | |
2304 | // disassembly easier to read. | |
2305 | void | |
2306 | create_stub_symbol(Mips_symbol<size>* sym, Symbol_table* symtab, | |
2307 | Target_mips<size, big_endian>* target, uint64_t symsize); | |
2308 | ||
1a08ae21 VR |
2309 | // Write to a map file. |
2310 | void | |
2311 | do_print_to_mapfile(Mapfile* mapfile) const | |
2312 | { mapfile->print_output_data(this, _(".LA25.stubs")); } | |
2313 | ||
9810d34d SS |
2314 | // Write out the LA25 stub section. |
2315 | void | |
2316 | do_write(Output_file*); | |
2317 | ||
2318 | // Symbols that have LA25 stubs. | |
15eb1beb | 2319 | std::vector<Mips_symbol<size>*> symbols_; |
9810d34d SS |
2320 | }; |
2321 | ||
47a9f4fc VR |
2322 | // MIPS-specific relocation writer. |
2323 | ||
2324 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
2325 | struct Mips_output_reloc_writer; | |
2326 | ||
2327 | template<int sh_type, bool dynamic, bool big_endian> | |
2328 | struct Mips_output_reloc_writer<sh_type, dynamic, 32, big_endian> | |
2329 | { | |
2330 | typedef Output_reloc<sh_type, dynamic, 32, big_endian> Output_reloc_type; | |
2331 | typedef std::vector<Output_reloc_type> Relocs; | |
2332 | ||
2333 | static void | |
2334 | write(typename Relocs::const_iterator p, unsigned char* pov) | |
2335 | { p->write(pov); } | |
2336 | }; | |
2337 | ||
2338 | template<int sh_type, bool dynamic, bool big_endian> | |
2339 | struct Mips_output_reloc_writer<sh_type, dynamic, 64, big_endian> | |
2340 | { | |
2341 | typedef Output_reloc<sh_type, dynamic, 64, big_endian> Output_reloc_type; | |
2342 | typedef std::vector<Output_reloc_type> Relocs; | |
2343 | ||
2344 | static void | |
2345 | write(typename Relocs::const_iterator p, unsigned char* pov) | |
2346 | { | |
2347 | elfcpp::Mips64_rel_write<big_endian> orel(pov); | |
2348 | orel.put_r_offset(p->get_address()); | |
2349 | orel.put_r_sym(p->get_symbol_index()); | |
2350 | orel.put_r_ssym(RSS_UNDEF); | |
2351 | orel.put_r_type(p->type()); | |
2352 | if (p->type() == elfcpp::R_MIPS_REL32) | |
2353 | orel.put_r_type2(elfcpp::R_MIPS_64); | |
2354 | else | |
2355 | orel.put_r_type2(elfcpp::R_MIPS_NONE); | |
2356 | orel.put_r_type3(elfcpp::R_MIPS_NONE); | |
2357 | } | |
2358 | }; | |
2359 | ||
2360 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
2361 | class Mips_output_data_reloc : public Output_data_reloc<sh_type, dynamic, | |
2362 | size, big_endian> | |
2363 | { | |
2364 | public: | |
2365 | Mips_output_data_reloc(bool sort_relocs) | |
2366 | : Output_data_reloc<sh_type, dynamic, size, big_endian>(sort_relocs) | |
2367 | { } | |
2368 | ||
2369 | protected: | |
2370 | // Write out the data. | |
2371 | void | |
2372 | do_write(Output_file* of) | |
2373 | { | |
2374 | typedef Mips_output_reloc_writer<sh_type, dynamic, size, | |
2375 | big_endian> Writer; | |
2376 | this->template do_write_generic<Writer>(of); | |
2377 | } | |
2378 | }; | |
2379 | ||
2380 | ||
9810d34d SS |
2381 | // A class to handle the PLT data. |
2382 | ||
2383 | template<int size, bool big_endian> | |
2384 | class Mips_output_data_plt : public Output_section_data | |
2385 | { | |
2386 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
47a9f4fc VR |
2387 | typedef Mips_output_data_reloc<elfcpp::SHT_REL, true, |
2388 | size, big_endian> Reloc_section; | |
9810d34d SS |
2389 | |
2390 | public: | |
2391 | // Create the PLT section. The ordinary .got section is an argument, | |
2392 | // since we need to refer to the start. | |
2393 | Mips_output_data_plt(Layout* layout, Output_data_space* got_plt, | |
2394 | Target_mips<size, big_endian>* target) | |
2395 | : Output_section_data(size == 32 ? 4 : 8), got_plt_(got_plt), symbols_(), | |
2396 | plt_mips_offset_(0), plt_comp_offset_(0), plt_header_size_(0), | |
2397 | target_(target) | |
2398 | { | |
2399 | this->rel_ = new Reloc_section(false); | |
2400 | layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL, | |
2401 | elfcpp::SHF_ALLOC, this->rel_, | |
2402 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
2403 | } | |
2404 | ||
2405 | // Add an entry to the PLT for a symbol referenced by r_type relocation. | |
2406 | void | |
2407 | add_entry(Mips_symbol<size>* gsym, unsigned int r_type); | |
2408 | ||
2409 | // Return the .rel.plt section data. | |
2410 | const Reloc_section* | |
2411 | rel_plt() const | |
2412 | { return this->rel_; } | |
2413 | ||
2414 | // Return the number of PLT entries. | |
2415 | unsigned int | |
2416 | entry_count() const | |
2417 | { return this->symbols_.size(); } | |
2418 | ||
2419 | // Return the offset of the first non-reserved PLT entry. | |
2420 | unsigned int | |
2421 | first_plt_entry_offset() const | |
2422 | { return sizeof(plt0_entry_o32); } | |
2423 | ||
2424 | // Return the size of a PLT entry. | |
2425 | unsigned int | |
2426 | plt_entry_size() const | |
2427 | { return sizeof(plt_entry); } | |
2428 | ||
2429 | // Set final PLT offsets. For each symbol, determine whether standard or | |
2430 | // compressed (MIPS16 or microMIPS) PLT entry is used. | |
2431 | void | |
2432 | set_plt_offsets(); | |
2433 | ||
2434 | // Return the offset of the first standard PLT entry. | |
2435 | unsigned int | |
2436 | first_mips_plt_offset() const | |
2437 | { return this->plt_header_size_; } | |
2438 | ||
2439 | // Return the offset of the first compressed PLT entry. | |
2440 | unsigned int | |
2441 | first_comp_plt_offset() const | |
2442 | { return this->plt_header_size_ + this->plt_mips_offset_; } | |
2443 | ||
2444 | // Return whether there are any standard PLT entries. | |
2445 | bool | |
2446 | has_standard_entries() const | |
2447 | { return this->plt_mips_offset_ > 0; } | |
2448 | ||
2449 | // Return the output address of standard PLT entry. | |
2450 | Mips_address | |
2451 | mips_entry_address(const Mips_symbol<size>* sym) const | |
2452 | { | |
2453 | gold_assert (sym->has_mips_plt_offset()); | |
2454 | return (this->address() + this->first_mips_plt_offset() | |
2455 | + sym->mips_plt_offset()); | |
2456 | } | |
2457 | ||
2458 | // Return the output address of compressed (MIPS16 or microMIPS) PLT entry. | |
2459 | Mips_address | |
2460 | comp_entry_address(const Mips_symbol<size>* sym) const | |
2461 | { | |
2462 | gold_assert (sym->has_comp_plt_offset()); | |
2463 | return (this->address() + this->first_comp_plt_offset() | |
2464 | + sym->comp_plt_offset()); | |
2465 | } | |
2466 | ||
2467 | protected: | |
2468 | void | |
2469 | do_adjust_output_section(Output_section* os) | |
2470 | { os->set_entsize(0); } | |
2471 | ||
2472 | // Write to a map file. | |
2473 | void | |
2474 | do_print_to_mapfile(Mapfile* mapfile) const | |
2475 | { mapfile->print_output_data(this, _(".plt")); } | |
2476 | ||
2477 | private: | |
2478 | // Template for the first PLT entry. | |
2479 | static const uint32_t plt0_entry_o32[]; | |
2480 | static const uint32_t plt0_entry_n32[]; | |
2481 | static const uint32_t plt0_entry_n64[]; | |
2482 | static const uint32_t plt0_entry_micromips_o32[]; | |
2483 | static const uint32_t plt0_entry_micromips32_o32[]; | |
2484 | ||
2485 | // Template for subsequent PLT entries. | |
2486 | static const uint32_t plt_entry[]; | |
2487 | static const uint32_t plt_entry_mips16_o32[]; | |
2488 | static const uint32_t plt_entry_micromips_o32[]; | |
2489 | static const uint32_t plt_entry_micromips32_o32[]; | |
2490 | ||
2491 | // Set the final size. | |
2492 | void | |
2493 | set_final_data_size() | |
2494 | { | |
2495 | this->set_data_size(this->plt_header_size_ + this->plt_mips_offset_ | |
2496 | + this->plt_comp_offset_); | |
2497 | } | |
2498 | ||
2499 | // Write out the PLT data. | |
2500 | void | |
2501 | do_write(Output_file*); | |
2502 | ||
2503 | // Return whether the plt header contains microMIPS code. For the sake of | |
2504 | // cache alignment always use a standard header whenever any standard entries | |
2505 | // are present even if microMIPS entries are present as well. This also lets | |
2506 | // the microMIPS header rely on the value of $v0 only set by microMIPS | |
2507 | // entries, for a small size reduction. | |
2508 | bool | |
2509 | is_plt_header_compressed() const | |
2510 | { | |
2511 | gold_assert(this->plt_mips_offset_ + this->plt_comp_offset_ != 0); | |
2512 | return this->target_->is_output_micromips() && this->plt_mips_offset_ == 0; | |
2513 | } | |
2514 | ||
2515 | // Return the size of the PLT header. | |
2516 | unsigned int | |
2517 | get_plt_header_size() const | |
2518 | { | |
2519 | if (this->target_->is_output_n64()) | |
2520 | return 4 * sizeof(plt0_entry_n64) / sizeof(plt0_entry_n64[0]); | |
2521 | else if (this->target_->is_output_n32()) | |
2522 | return 4 * sizeof(plt0_entry_n32) / sizeof(plt0_entry_n32[0]); | |
2523 | else if (!this->is_plt_header_compressed()) | |
2524 | return 4 * sizeof(plt0_entry_o32) / sizeof(plt0_entry_o32[0]); | |
2525 | else if (this->target_->use_32bit_micromips_instructions()) | |
2526 | return (2 * sizeof(plt0_entry_micromips32_o32) | |
2527 | / sizeof(plt0_entry_micromips32_o32[0])); | |
2528 | else | |
2529 | return (2 * sizeof(plt0_entry_micromips_o32) | |
2530 | / sizeof(plt0_entry_micromips_o32[0])); | |
2531 | } | |
2532 | ||
2533 | // Return the PLT header entry. | |
2534 | const uint32_t* | |
2535 | get_plt_header_entry() const | |
2536 | { | |
2537 | if (this->target_->is_output_n64()) | |
2538 | return plt0_entry_n64; | |
2539 | else if (this->target_->is_output_n32()) | |
2540 | return plt0_entry_n32; | |
2541 | else if (!this->is_plt_header_compressed()) | |
2542 | return plt0_entry_o32; | |
2543 | else if (this->target_->use_32bit_micromips_instructions()) | |
2544 | return plt0_entry_micromips32_o32; | |
2545 | else | |
2546 | return plt0_entry_micromips_o32; | |
2547 | } | |
2548 | ||
2549 | // Return the size of the standard PLT entry. | |
2550 | unsigned int | |
2551 | standard_plt_entry_size() const | |
2552 | { return 4 * sizeof(plt_entry) / sizeof(plt_entry[0]); } | |
2553 | ||
2554 | // Return the size of the compressed PLT entry. | |
2555 | unsigned int | |
2556 | compressed_plt_entry_size() const | |
2557 | { | |
2558 | gold_assert(!this->target_->is_output_newabi()); | |
2559 | ||
2560 | if (!this->target_->is_output_micromips()) | |
2561 | return (2 * sizeof(plt_entry_mips16_o32) | |
2562 | / sizeof(plt_entry_mips16_o32[0])); | |
2563 | else if (this->target_->use_32bit_micromips_instructions()) | |
2564 | return (2 * sizeof(plt_entry_micromips32_o32) | |
2565 | / sizeof(plt_entry_micromips32_o32[0])); | |
2566 | else | |
2567 | return (2 * sizeof(plt_entry_micromips_o32) | |
2568 | / sizeof(plt_entry_micromips_o32[0])); | |
2569 | } | |
2570 | ||
2571 | // The reloc section. | |
2572 | Reloc_section* rel_; | |
2573 | // The .got.plt section. | |
2574 | Output_data_space* got_plt_; | |
2575 | // Symbols that have PLT entry. | |
2576 | std::vector<Mips_symbol<size>*> symbols_; | |
2577 | // The offset of the next standard PLT entry to create. | |
2578 | unsigned int plt_mips_offset_; | |
2579 | // The offset of the next compressed PLT entry to create. | |
2580 | unsigned int plt_comp_offset_; | |
2581 | // The size of the PLT header in bytes. | |
2582 | unsigned int plt_header_size_; | |
2583 | // The target. | |
2584 | Target_mips<size, big_endian>* target_; | |
2585 | }; | |
2586 | ||
2587 | // A class to handle the .MIPS.stubs data. | |
2588 | ||
2589 | template<int size, bool big_endian> | |
2590 | class Mips_output_data_mips_stubs : public Output_section_data | |
2591 | { | |
2592 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
2593 | ||
15eb1beb VR |
2594 | // Unordered set of .MIPS.stubs entries. |
2595 | typedef Unordered_set<Mips_symbol<size>*, Mips_symbol_hash<size> > | |
2596 | Mips_stubs_entry_set; | |
2597 | ||
9810d34d SS |
2598 | public: |
2599 | Mips_output_data_mips_stubs(Target_mips<size, big_endian>* target) | |
2600 | : Output_section_data(size == 32 ? 4 : 8), symbols_(), dynsym_count_(-1U), | |
2601 | stub_offsets_are_set_(false), target_(target) | |
2602 | { } | |
2603 | ||
2604 | // Create entry for a symbol. | |
2605 | void | |
2606 | make_entry(Mips_symbol<size>*); | |
2607 | ||
2608 | // Remove entry for a symbol. | |
2609 | void | |
2610 | remove_entry(Mips_symbol<size>* gsym); | |
2611 | ||
2612 | // Set stub offsets for symbols. This method expects that the number of | |
2613 | // entries in dynamic symbol table is set. | |
2614 | void | |
2615 | set_lazy_stub_offsets(); | |
2616 | ||
2617 | void | |
2618 | set_needs_dynsym_value(); | |
2619 | ||
2620 | // Set the number of entries in dynamic symbol table. | |
2621 | void | |
2622 | set_dynsym_count(unsigned int dynsym_count) | |
2623 | { this->dynsym_count_ = dynsym_count; } | |
2624 | ||
2625 | // Return maximum size of the stub, ie. the stub size if the dynamic symbol | |
2626 | // count is greater than 0x10000. If the dynamic symbol count is less than | |
2627 | // 0x10000, the stub will be 4 bytes smaller. | |
2628 | // There's no disadvantage from using microMIPS code here, so for the sake of | |
2629 | // pure-microMIPS binaries we prefer it whenever there's any microMIPS code in | |
2630 | // output produced at all. This has a benefit of stubs being shorter by | |
2631 | // 4 bytes each too, unless in the insn32 mode. | |
2632 | unsigned int | |
2633 | stub_max_size() const | |
2634 | { | |
2635 | if (!this->target_->is_output_micromips() | |
2636 | || this->target_->use_32bit_micromips_instructions()) | |
2637 | return 20; | |
2638 | else | |
2639 | return 16; | |
2640 | } | |
2641 | ||
2642 | // Return the size of the stub. This method expects that the final dynsym | |
2643 | // count is set. | |
2644 | unsigned int | |
2645 | stub_size() const | |
2646 | { | |
2647 | gold_assert(this->dynsym_count_ != -1U); | |
2648 | if (this->dynsym_count_ > 0x10000) | |
2649 | return this->stub_max_size(); | |
2650 | else | |
2651 | return this->stub_max_size() - 4; | |
2652 | } | |
2653 | ||
2654 | // Return output address of a stub. | |
2655 | Mips_address | |
2656 | stub_address(const Mips_symbol<size>* sym) const | |
2657 | { | |
2658 | gold_assert(sym->has_lazy_stub()); | |
2659 | return this->address() + sym->lazy_stub_offset(); | |
2660 | } | |
2661 | ||
2662 | protected: | |
2663 | void | |
2664 | do_adjust_output_section(Output_section* os) | |
2665 | { os->set_entsize(0); } | |
2666 | ||
2667 | // Write to a map file. | |
2668 | void | |
2669 | do_print_to_mapfile(Mapfile* mapfile) const | |
2670 | { mapfile->print_output_data(this, _(".MIPS.stubs")); } | |
2671 | ||
2672 | private: | |
2673 | static const uint32_t lazy_stub_normal_1[]; | |
2674 | static const uint32_t lazy_stub_normal_1_n64[]; | |
2675 | static const uint32_t lazy_stub_normal_2[]; | |
2676 | static const uint32_t lazy_stub_normal_2_n64[]; | |
2677 | static const uint32_t lazy_stub_big[]; | |
2678 | static const uint32_t lazy_stub_big_n64[]; | |
2679 | ||
2680 | static const uint32_t lazy_stub_micromips_normal_1[]; | |
2681 | static const uint32_t lazy_stub_micromips_normal_1_n64[]; | |
2682 | static const uint32_t lazy_stub_micromips_normal_2[]; | |
2683 | static const uint32_t lazy_stub_micromips_normal_2_n64[]; | |
2684 | static const uint32_t lazy_stub_micromips_big[]; | |
2685 | static const uint32_t lazy_stub_micromips_big_n64[]; | |
2686 | ||
2687 | static const uint32_t lazy_stub_micromips32_normal_1[]; | |
2688 | static const uint32_t lazy_stub_micromips32_normal_1_n64[]; | |
2689 | static const uint32_t lazy_stub_micromips32_normal_2[]; | |
2690 | static const uint32_t lazy_stub_micromips32_normal_2_n64[]; | |
2691 | static const uint32_t lazy_stub_micromips32_big[]; | |
2692 | static const uint32_t lazy_stub_micromips32_big_n64[]; | |
2693 | ||
2694 | // Set the final size. | |
2695 | void | |
2696 | set_final_data_size() | |
2697 | { this->set_data_size(this->symbols_.size() * this->stub_max_size()); } | |
2698 | ||
2699 | // Write out the .MIPS.stubs data. | |
2700 | void | |
2701 | do_write(Output_file*); | |
2702 | ||
2703 | // .MIPS.stubs symbols | |
15eb1beb | 2704 | Mips_stubs_entry_set symbols_; |
9810d34d SS |
2705 | // Number of entries in dynamic symbol table. |
2706 | unsigned int dynsym_count_; | |
2707 | // Whether the stub offsets are set. | |
2708 | bool stub_offsets_are_set_; | |
2709 | // The target. | |
2710 | Target_mips<size, big_endian>* target_; | |
2711 | }; | |
2712 | ||
2713 | // This class handles Mips .reginfo output section. | |
2714 | ||
2715 | template<int size, bool big_endian> | |
2716 | class Mips_output_section_reginfo : public Output_section | |
2717 | { | |
2718 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
2719 | ||
2720 | public: | |
2721 | Mips_output_section_reginfo(const char* name, elfcpp::Elf_Word type, | |
2722 | elfcpp::Elf_Xword flags, | |
2723 | Target_mips<size, big_endian>* target) | |
2724 | : Output_section(name, type, flags), target_(target), gprmask_(0), | |
2725 | cprmask1_(0), cprmask2_(0), cprmask3_(0), cprmask4_(0) | |
2726 | { } | |
2727 | ||
2728 | // Downcast a base pointer to a Mips_output_section_reginfo pointer. | |
2729 | static Mips_output_section_reginfo<size, big_endian>* | |
2730 | as_mips_output_section_reginfo(Output_section* os) | |
2731 | { return static_cast<Mips_output_section_reginfo<size, big_endian>*>(os); } | |
2732 | ||
2733 | // Set masks of the output .reginfo section. | |
2734 | void | |
2735 | set_masks(Valtype gprmask, Valtype cprmask1, Valtype cprmask2, | |
2736 | Valtype cprmask3, Valtype cprmask4) | |
2737 | { | |
2738 | this->gprmask_ = gprmask; | |
2739 | this->cprmask1_ = cprmask1; | |
2740 | this->cprmask2_ = cprmask2; | |
2741 | this->cprmask3_ = cprmask3; | |
2742 | this->cprmask4_ = cprmask4; | |
2743 | } | |
2744 | ||
2745 | protected: | |
2746 | // Set the final data size. | |
2747 | void | |
2748 | set_final_data_size() | |
2749 | { this->set_data_size(24); } | |
2750 | ||
2751 | // Write out reginfo section. | |
2752 | void | |
2753 | do_write(Output_file* of); | |
2754 | ||
2755 | private: | |
2756 | Target_mips<size, big_endian>* target_; | |
2757 | ||
2758 | // gprmask of the output .reginfo section. | |
2759 | Valtype gprmask_; | |
2760 | // cprmask1 of the output .reginfo section. | |
2761 | Valtype cprmask1_; | |
2762 | // cprmask2 of the output .reginfo section. | |
2763 | Valtype cprmask2_; | |
2764 | // cprmask3 of the output .reginfo section. | |
2765 | Valtype cprmask3_; | |
2766 | // cprmask4 of the output .reginfo section. | |
2767 | Valtype cprmask4_; | |
2768 | }; | |
2769 | ||
2770 | // The MIPS target has relocation types which default handling of relocatable | |
2771 | // relocation cannot process. So we have to extend the default code. | |
2772 | ||
4d625b70 | 2773 | template<bool big_endian, typename Classify_reloc> |
9810d34d | 2774 | class Mips_scan_relocatable_relocs : |
4d625b70 | 2775 | public Default_scan_relocatable_relocs<Classify_reloc> |
9810d34d SS |
2776 | { |
2777 | public: | |
2778 | // Return the strategy to use for a local symbol which is a section | |
2779 | // symbol, given the relocation type. | |
2780 | inline Relocatable_relocs::Reloc_strategy | |
2781 | local_section_strategy(unsigned int r_type, Relobj* object) | |
2782 | { | |
4d625b70 | 2783 | if (Classify_reloc::sh_type == elfcpp::SHT_RELA) |
9810d34d SS |
2784 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; |
2785 | else | |
2786 | { | |
2787 | switch (r_type) | |
2788 | { | |
2789 | case elfcpp::R_MIPS_26: | |
2790 | return Relocatable_relocs::RELOC_SPECIAL; | |
2791 | ||
2792 | default: | |
4d625b70 | 2793 | return Default_scan_relocatable_relocs<Classify_reloc>:: |
9810d34d SS |
2794 | local_section_strategy(r_type, object); |
2795 | } | |
2796 | } | |
2797 | } | |
2798 | }; | |
2799 | ||
2800 | // Mips_copy_relocs class. The only difference from the base class is the | |
2801 | // method emit_mips, which should be called instead of Copy_reloc_entry::emit. | |
2802 | // Mips cannot convert all relocation types to dynamic relocs. If a reloc | |
2803 | // cannot be made dynamic, a COPY reloc is emitted. | |
2804 | ||
2805 | template<int sh_type, int size, bool big_endian> | |
2806 | class Mips_copy_relocs : public Copy_relocs<sh_type, size, big_endian> | |
2807 | { | |
2808 | public: | |
2809 | Mips_copy_relocs() | |
2810 | : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_MIPS_COPY) | |
2811 | { } | |
2812 | ||
2813 | // Emit any saved relocations which turn out to be needed. This is | |
2814 | // called after all the relocs have been scanned. | |
2815 | void | |
2816 | emit_mips(Output_data_reloc<sh_type, true, size, big_endian>*, | |
2817 | Symbol_table*, Layout*, Target_mips<size, big_endian>*); | |
2818 | ||
2819 | private: | |
2820 | typedef typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry | |
2821 | Copy_reloc_entry; | |
2822 | ||
2823 | // Emit this reloc if appropriate. This is called after we have | |
2824 | // scanned all the relocations, so we know whether we emitted a | |
2825 | // COPY relocation for SYM_. | |
2826 | void | |
2827 | emit_entry(Copy_reloc_entry& entry, | |
2828 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section, | |
2829 | Symbol_table* symtab, Layout* layout, | |
2830 | Target_mips<size, big_endian>* target); | |
2831 | }; | |
2832 | ||
2833 | ||
2834 | // Return true if the symbol SYM should be considered to resolve local | |
2835 | // to the current module, and false otherwise. The logic is taken from | |
2836 | // GNU ld's method _bfd_elf_symbol_refs_local_p. | |
2837 | static bool | |
2838 | symbol_refs_local(const Symbol* sym, bool has_dynsym_entry, | |
2839 | bool local_protected) | |
2840 | { | |
2841 | // If it's a local sym, of course we resolve locally. | |
2842 | if (sym == NULL) | |
2843 | return true; | |
2844 | ||
2845 | // STV_HIDDEN or STV_INTERNAL ones must be local. | |
2846 | if (sym->visibility() == elfcpp::STV_HIDDEN | |
2847 | || sym->visibility() == elfcpp::STV_INTERNAL) | |
2848 | return true; | |
2849 | ||
2850 | // If we don't have a definition in a regular file, then we can't | |
2851 | // resolve locally. The sym is either undefined or dynamic. | |
2852 | if (sym->source() != Symbol::FROM_OBJECT || sym->object()->is_dynamic() | |
2853 | || sym->is_undefined()) | |
2854 | return false; | |
2855 | ||
2856 | // Forced local symbols resolve locally. | |
2857 | if (sym->is_forced_local()) | |
2858 | return true; | |
2859 | ||
2860 | // As do non-dynamic symbols. | |
2861 | if (!has_dynsym_entry) | |
2862 | return true; | |
2863 | ||
2864 | // At this point, we know the symbol is defined and dynamic. In an | |
2865 | // executable it must resolve locally, likewise when building symbolic | |
2866 | // shared libraries. | |
2867 | if (parameters->options().output_is_executable() | |
2868 | || parameters->options().Bsymbolic()) | |
2869 | return true; | |
2870 | ||
2871 | // Now deal with defined dynamic symbols in shared libraries. Ones | |
2872 | // with default visibility might not resolve locally. | |
2873 | if (sym->visibility() == elfcpp::STV_DEFAULT) | |
2874 | return false; | |
2875 | ||
2876 | // STV_PROTECTED non-function symbols are local. | |
2877 | if (sym->type() != elfcpp::STT_FUNC) | |
2878 | return true; | |
2879 | ||
2880 | // Function pointer equality tests may require that STV_PROTECTED | |
2881 | // symbols be treated as dynamic symbols. If the address of a | |
2882 | // function not defined in an executable is set to that function's | |
2883 | // plt entry in the executable, then the address of the function in | |
2884 | // a shared library must also be the plt entry in the executable. | |
2885 | return local_protected; | |
2886 | } | |
2887 | ||
2888 | // Return TRUE if references to this symbol always reference the symbol in this | |
2889 | // object. | |
2890 | static bool | |
2891 | symbol_references_local(const Symbol* sym, bool has_dynsym_entry) | |
2892 | { | |
2893 | return symbol_refs_local(sym, has_dynsym_entry, false); | |
2894 | } | |
2895 | ||
2896 | // Return TRUE if calls to this symbol always call the version in this object. | |
2897 | static bool | |
2898 | symbol_calls_local(const Symbol* sym, bool has_dynsym_entry) | |
2899 | { | |
2900 | return symbol_refs_local(sym, has_dynsym_entry, true); | |
2901 | } | |
2902 | ||
2903 | // Compare GOT offsets of two symbols. | |
2904 | ||
2905 | template<int size, bool big_endian> | |
2906 | static bool | |
2907 | got_offset_compare(Symbol* sym1, Symbol* sym2) | |
2908 | { | |
2909 | Mips_symbol<size>* mips_sym1 = Mips_symbol<size>::as_mips_sym(sym1); | |
2910 | Mips_symbol<size>* mips_sym2 = Mips_symbol<size>::as_mips_sym(sym2); | |
2911 | unsigned int area1 = mips_sym1->global_got_area(); | |
2912 | unsigned int area2 = mips_sym2->global_got_area(); | |
2913 | gold_assert(area1 != GGA_NONE && area1 != GGA_NONE); | |
2914 | ||
2915 | // GGA_NORMAL entries always come before GGA_RELOC_ONLY. | |
2916 | if (area1 != area2) | |
2917 | return area1 < area2; | |
2918 | ||
2919 | return mips_sym1->global_gotoffset() < mips_sym2->global_gotoffset(); | |
2920 | } | |
2921 | ||
2922 | // This method divides dynamic symbols into symbols that have GOT entry, and | |
2923 | // symbols that don't have GOT entry. It also sorts symbols with the GOT entry. | |
2924 | // Mips ABI requires that symbols with the GOT entry must be at the end of | |
2925 | // dynamic symbol table, and the order in dynamic symbol table must match the | |
2926 | // order in GOT. | |
2927 | ||
2928 | template<int size, bool big_endian> | |
2929 | static void | |
2930 | reorder_dyn_symbols(std::vector<Symbol*>* dyn_symbols, | |
2931 | std::vector<Symbol*>* non_got_symbols, | |
2932 | std::vector<Symbol*>* got_symbols) | |
2933 | { | |
2934 | for (std::vector<Symbol*>::iterator p = dyn_symbols->begin(); | |
2935 | p != dyn_symbols->end(); | |
2936 | ++p) | |
2937 | { | |
2938 | Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(*p); | |
2939 | if (mips_sym->global_got_area() == GGA_NORMAL | |
2940 | || mips_sym->global_got_area() == GGA_RELOC_ONLY) | |
2941 | got_symbols->push_back(mips_sym); | |
2942 | else | |
2943 | non_got_symbols->push_back(mips_sym); | |
2944 | } | |
2945 | ||
2946 | std::sort(got_symbols->begin(), got_symbols->end(), | |
2947 | got_offset_compare<size, big_endian>); | |
2948 | } | |
2949 | ||
2950 | // Functor class for processing the global symbol table. | |
2951 | ||
2952 | template<int size, bool big_endian> | |
2953 | class Symbol_visitor_check_symbols | |
2954 | { | |
2955 | public: | |
2956 | Symbol_visitor_check_symbols(Target_mips<size, big_endian>* target, | |
2957 | Layout* layout, Symbol_table* symtab) | |
2958 | : target_(target), layout_(layout), symtab_(symtab) | |
2959 | { } | |
2960 | ||
2961 | void | |
2962 | operator()(Sized_symbol<size>* sym) | |
2963 | { | |
2964 | Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(sym); | |
2965 | if (local_pic_function<size, big_endian>(mips_sym)) | |
2966 | { | |
2967 | // SYM is a function that might need $25 to be valid on entry. | |
2968 | // If we're creating a non-PIC relocatable object, mark SYM as | |
2969 | // being PIC. If we're creating a non-relocatable object with | |
2970 | // non-PIC branches and jumps to SYM, make sure that SYM has an la25 | |
2971 | // stub. | |
2972 | if (parameters->options().relocatable()) | |
2973 | { | |
2974 | if (!parameters->options().output_is_position_independent()) | |
2975 | mips_sym->set_pic(); | |
2976 | } | |
2977 | else if (mips_sym->has_nonpic_branches()) | |
2978 | { | |
2979 | this->target_->la25_stub_section(layout_) | |
2980 | ->create_la25_stub(this->symtab_, this->target_, mips_sym); | |
2981 | } | |
2982 | } | |
2983 | } | |
2984 | ||
2985 | private: | |
2986 | Target_mips<size, big_endian>* target_; | |
2987 | Layout* layout_; | |
2988 | Symbol_table* symtab_; | |
2989 | }; | |
2990 | ||
4d625b70 CC |
2991 | // Relocation types, parameterized by SHT_REL vs. SHT_RELA, size, |
2992 | // and endianness. The relocation format for MIPS-64 is non-standard. | |
2993 | ||
2994 | template<int sh_type, int size, bool big_endian> | |
2995 | struct Mips_reloc_types; | |
2996 | ||
2997 | template<bool big_endian> | |
2998 | struct Mips_reloc_types<elfcpp::SHT_REL, 32, big_endian> | |
2999 | { | |
3000 | typedef typename elfcpp::Rel<32, big_endian> Reloc; | |
3001 | typedef typename elfcpp::Rel_write<32, big_endian> Reloc_write; | |
3002 | ||
47a9f4fc | 3003 | static typename elfcpp::Elf_types<32>::Elf_Swxword |
4d625b70 CC |
3004 | get_r_addend(const Reloc*) |
3005 | { return 0; } | |
3006 | ||
3007 | static inline void | |
3008 | set_reloc_addend(Reloc_write*, | |
3009 | typename elfcpp::Elf_types<32>::Elf_Swxword) | |
3010 | { gold_unreachable(); } | |
3011 | }; | |
3012 | ||
3013 | template<bool big_endian> | |
3014 | struct Mips_reloc_types<elfcpp::SHT_RELA, 32, big_endian> | |
3015 | { | |
3016 | typedef typename elfcpp::Rela<32, big_endian> Reloc; | |
3017 | typedef typename elfcpp::Rela_write<32, big_endian> Reloc_write; | |
3018 | ||
47a9f4fc | 3019 | static typename elfcpp::Elf_types<32>::Elf_Swxword |
4d625b70 CC |
3020 | get_r_addend(const Reloc* reloc) |
3021 | { return reloc->get_r_addend(); } | |
3022 | ||
3023 | static inline void | |
3024 | set_reloc_addend(Reloc_write* p, | |
3025 | typename elfcpp::Elf_types<32>::Elf_Swxword val) | |
3026 | { p->put_r_addend(val); } | |
3027 | }; | |
3028 | ||
3029 | template<bool big_endian> | |
3030 | struct Mips_reloc_types<elfcpp::SHT_REL, 64, big_endian> | |
3031 | { | |
3032 | typedef typename elfcpp::Mips64_rel<big_endian> Reloc; | |
3033 | typedef typename elfcpp::Mips64_rel_write<big_endian> Reloc_write; | |
3034 | ||
47a9f4fc | 3035 | static typename elfcpp::Elf_types<64>::Elf_Swxword |
4d625b70 CC |
3036 | get_r_addend(const Reloc*) |
3037 | { return 0; } | |
3038 | ||
3039 | static inline void | |
3040 | set_reloc_addend(Reloc_write*, | |
3041 | typename elfcpp::Elf_types<64>::Elf_Swxword) | |
3042 | { gold_unreachable(); } | |
3043 | }; | |
3044 | ||
3045 | template<bool big_endian> | |
3046 | struct Mips_reloc_types<elfcpp::SHT_RELA, 64, big_endian> | |
3047 | { | |
3048 | typedef typename elfcpp::Mips64_rela<big_endian> Reloc; | |
3049 | typedef typename elfcpp::Mips64_rela_write<big_endian> Reloc_write; | |
3050 | ||
47a9f4fc | 3051 | static typename elfcpp::Elf_types<64>::Elf_Swxword |
4d625b70 CC |
3052 | get_r_addend(const Reloc* reloc) |
3053 | { return reloc->get_r_addend(); } | |
3054 | ||
3055 | static inline void | |
3056 | set_reloc_addend(Reloc_write* p, | |
3057 | typename elfcpp::Elf_types<64>::Elf_Swxword val) | |
3058 | { p->put_r_addend(val); } | |
3059 | }; | |
3060 | ||
3061 | // Forward declaration. | |
3062 | static unsigned int | |
3063 | mips_get_size_for_reloc(unsigned int, Relobj*); | |
3064 | ||
3065 | // A class for inquiring about properties of a relocation, | |
3066 | // used while scanning relocs during a relocatable link and | |
3067 | // garbage collection. | |
3068 | ||
3069 | template<int sh_type_, int size, bool big_endian> | |
3070 | class Mips_classify_reloc; | |
3071 | ||
3072 | template<int sh_type_, bool big_endian> | |
3073 | class Mips_classify_reloc<sh_type_, 32, big_endian> : | |
3074 | public gold::Default_classify_reloc<sh_type_, 32, big_endian> | |
3075 | { | |
3076 | public: | |
3077 | typedef typename Mips_reloc_types<sh_type_, 32, big_endian>::Reloc | |
3078 | Reltype; | |
3079 | typedef typename Mips_reloc_types<sh_type_, 32, big_endian>::Reloc_write | |
3080 | Reltype_write; | |
3081 | ||
3082 | // Return the symbol referred to by the relocation. | |
3083 | static inline unsigned int | |
3084 | get_r_sym(const Reltype* reloc) | |
3085 | { return elfcpp::elf_r_sym<32>(reloc->get_r_info()); } | |
3086 | ||
3087 | // Return the type of the relocation. | |
3088 | static inline unsigned int | |
3089 | get_r_type(const Reltype* reloc) | |
3090 | { return elfcpp::elf_r_type<32>(reloc->get_r_info()); } | |
3091 | ||
47a9f4fc VR |
3092 | static inline unsigned int |
3093 | get_r_type2(const Reltype*) | |
3094 | { return 0; } | |
3095 | ||
3096 | static inline unsigned int | |
3097 | get_r_type3(const Reltype*) | |
3098 | { return 0; } | |
3099 | ||
3100 | static inline unsigned int | |
3101 | get_r_ssym(const Reltype*) | |
3102 | { return 0; } | |
3103 | ||
4d625b70 CC |
3104 | // Return the explicit addend of the relocation (return 0 for SHT_REL). |
3105 | static inline unsigned int | |
3106 | get_r_addend(const Reltype* reloc) | |
8a8880cb CC |
3107 | { |
3108 | if (sh_type_ == elfcpp::SHT_REL) | |
3109 | return 0; | |
3110 | return Mips_reloc_types<sh_type_, 32, big_endian>::get_r_addend(reloc); | |
3111 | } | |
4d625b70 CC |
3112 | |
3113 | // Write the r_info field to a new reloc, using the r_info field from | |
3114 | // the original reloc, replacing the r_sym field with R_SYM. | |
3115 | static inline void | |
3116 | put_r_info(Reltype_write* new_reloc, Reltype* reloc, unsigned int r_sym) | |
3117 | { | |
3118 | unsigned int r_type = elfcpp::elf_r_type<32>(reloc->get_r_info()); | |
c2fa9ced | 3119 | new_reloc->put_r_info(elfcpp::elf_r_info<32>(r_sym, r_type)); |
4d625b70 CC |
3120 | } |
3121 | ||
3122 | // Write the r_addend field to a new reloc. | |
3123 | static inline void | |
3124 | put_r_addend(Reltype_write* to, | |
3125 | typename elfcpp::Elf_types<32>::Elf_Swxword addend) | |
3126 | { Mips_reloc_types<sh_type_, 32, big_endian>::set_reloc_addend(to, addend); } | |
3127 | ||
3128 | // Return the size of the addend of the relocation (only used for SHT_REL). | |
3129 | static unsigned int | |
3130 | get_size_for_reloc(unsigned int r_type, Relobj* obj) | |
3131 | { return mips_get_size_for_reloc(r_type, obj); } | |
3132 | }; | |
3133 | ||
3134 | template<int sh_type_, bool big_endian> | |
3135 | class Mips_classify_reloc<sh_type_, 64, big_endian> : | |
3136 | public gold::Default_classify_reloc<sh_type_, 64, big_endian> | |
3137 | { | |
3138 | public: | |
3139 | typedef typename Mips_reloc_types<sh_type_, 64, big_endian>::Reloc | |
3140 | Reltype; | |
3141 | typedef typename Mips_reloc_types<sh_type_, 64, big_endian>::Reloc_write | |
3142 | Reltype_write; | |
3143 | ||
3144 | // Return the symbol referred to by the relocation. | |
3145 | static inline unsigned int | |
3146 | get_r_sym(const Reltype* reloc) | |
3147 | { return reloc->get_r_sym(); } | |
3148 | ||
47a9f4fc | 3149 | // Return the r_type of the relocation. |
4d625b70 CC |
3150 | static inline unsigned int |
3151 | get_r_type(const Reltype* reloc) | |
3152 | { return reloc->get_r_type(); } | |
3153 | ||
47a9f4fc VR |
3154 | // Return the r_type2 of the relocation. |
3155 | static inline unsigned int | |
3156 | get_r_type2(const Reltype* reloc) | |
3157 | { return reloc->get_r_type2(); } | |
3158 | ||
3159 | // Return the r_type3 of the relocation. | |
3160 | static inline unsigned int | |
3161 | get_r_type3(const Reltype* reloc) | |
3162 | { return reloc->get_r_type3(); } | |
3163 | ||
3164 | // Return the special symbol of the relocation. | |
3165 | static inline unsigned int | |
3166 | get_r_ssym(const Reltype* reloc) | |
3167 | { return reloc->get_r_ssym(); } | |
3168 | ||
4d625b70 CC |
3169 | // Return the explicit addend of the relocation (return 0 for SHT_REL). |
3170 | static inline typename elfcpp::Elf_types<64>::Elf_Swxword | |
3171 | get_r_addend(const Reltype* reloc) | |
8a8880cb CC |
3172 | { |
3173 | if (sh_type_ == elfcpp::SHT_REL) | |
3174 | return 0; | |
3175 | return Mips_reloc_types<sh_type_, 64, big_endian>::get_r_addend(reloc); | |
3176 | } | |
4d625b70 CC |
3177 | |
3178 | // Write the r_info field to a new reloc, using the r_info field from | |
3179 | // the original reloc, replacing the r_sym field with R_SYM. | |
3180 | static inline void | |
3181 | put_r_info(Reltype_write* new_reloc, Reltype* reloc, unsigned int r_sym) | |
3182 | { | |
3183 | new_reloc->put_r_sym(r_sym); | |
3184 | new_reloc->put_r_ssym(reloc->get_r_ssym()); | |
3185 | new_reloc->put_r_type3(reloc->get_r_type3()); | |
3186 | new_reloc->put_r_type2(reloc->get_r_type2()); | |
3187 | new_reloc->put_r_type(reloc->get_r_type()); | |
3188 | } | |
3189 | ||
3190 | // Write the r_addend field to a new reloc. | |
3191 | static inline void | |
3192 | put_r_addend(Reltype_write* to, | |
3193 | typename elfcpp::Elf_types<64>::Elf_Swxword addend) | |
3194 | { Mips_reloc_types<sh_type_, 64, big_endian>::set_reloc_addend(to, addend); } | |
3195 | ||
3196 | // Return the size of the addend of the relocation (only used for SHT_REL). | |
3197 | static unsigned int | |
3198 | get_size_for_reloc(unsigned int r_type, Relobj* obj) | |
3199 | { return mips_get_size_for_reloc(r_type, obj); } | |
3200 | }; | |
3201 | ||
9810d34d SS |
3202 | template<int size, bool big_endian> |
3203 | class Target_mips : public Sized_target<size, big_endian> | |
3204 | { | |
3205 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
47a9f4fc | 3206 | typedef Mips_output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> |
9810d34d | 3207 | Reloc_section; |
9810d34d SS |
3208 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32; |
3209 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
4d625b70 CC |
3210 | typedef typename Mips_reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc |
3211 | Reltype; | |
3212 | typedef typename Mips_reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc | |
3213 | Relatype; | |
9810d34d SS |
3214 | |
3215 | public: | |
3216 | Target_mips(const Target::Target_info* info = &mips_info) | |
3217 | : Sized_target<size, big_endian>(info), got_(NULL), gp_(NULL), plt_(NULL), | |
3218 | got_plt_(NULL), rel_dyn_(NULL), copy_relocs_(), | |
3219 | dyn_relocs_(), la25_stub_(NULL), mips_mach_extensions_(), | |
01b84e25 VR |
3220 | mips_stubs_(NULL), mach_(0), layout_(NULL), got16_addends_(), |
3221 | entry_symbol_is_compressed_(false), insn32_(false) | |
9810d34d SS |
3222 | { |
3223 | this->add_machine_extensions(); | |
3224 | } | |
3225 | ||
3226 | // The offset of $gp from the beginning of the .got section. | |
3227 | static const unsigned int MIPS_GP_OFFSET = 0x7ff0; | |
3228 | ||
3229 | // The maximum size of the GOT for it to be addressable using 16-bit | |
3230 | // offsets from $gp. | |
3231 | static const unsigned int MIPS_GOT_MAX_SIZE = MIPS_GP_OFFSET + 0x7fff; | |
3232 | ||
3233 | // Make a new symbol table entry for the Mips target. | |
3234 | Sized_symbol<size>* | |
dc1c8a16 | 3235 | make_symbol(const char*, elfcpp::STT, Object*, unsigned int, uint64_t) |
9810d34d SS |
3236 | { return new Mips_symbol<size>(); } |
3237 | ||
3238 | // Process the relocations to determine unreferenced sections for | |
3239 | // garbage collection. | |
3240 | void | |
3241 | gc_process_relocs(Symbol_table* symtab, | |
3242 | Layout* layout, | |
3243 | Sized_relobj_file<size, big_endian>* object, | |
3244 | unsigned int data_shndx, | |
3245 | unsigned int sh_type, | |
3246 | const unsigned char* prelocs, | |
3247 | size_t reloc_count, | |
3248 | Output_section* output_section, | |
3249 | bool needs_special_offset_handling, | |
3250 | size_t local_symbol_count, | |
3251 | const unsigned char* plocal_symbols); | |
3252 | ||
3253 | // Scan the relocations to look for symbol adjustments. | |
3254 | void | |
3255 | scan_relocs(Symbol_table* symtab, | |
3256 | Layout* layout, | |
3257 | Sized_relobj_file<size, big_endian>* object, | |
3258 | unsigned int data_shndx, | |
3259 | unsigned int sh_type, | |
3260 | const unsigned char* prelocs, | |
3261 | size_t reloc_count, | |
3262 | Output_section* output_section, | |
3263 | bool needs_special_offset_handling, | |
3264 | size_t local_symbol_count, | |
3265 | const unsigned char* plocal_symbols); | |
3266 | ||
3267 | // Finalize the sections. | |
3268 | void | |
3269 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); | |
3270 | ||
3271 | // Relocate a section. | |
3272 | void | |
3273 | relocate_section(const Relocate_info<size, big_endian>*, | |
3274 | unsigned int sh_type, | |
3275 | const unsigned char* prelocs, | |
3276 | size_t reloc_count, | |
3277 | Output_section* output_section, | |
3278 | bool needs_special_offset_handling, | |
3279 | unsigned char* view, | |
3280 | Mips_address view_address, | |
3281 | section_size_type view_size, | |
3282 | const Reloc_symbol_changes*); | |
3283 | ||
3284 | // Scan the relocs during a relocatable link. | |
3285 | void | |
3286 | scan_relocatable_relocs(Symbol_table* symtab, | |
3287 | Layout* layout, | |
3288 | Sized_relobj_file<size, big_endian>* object, | |
3289 | unsigned int data_shndx, | |
3290 | unsigned int sh_type, | |
3291 | const unsigned char* prelocs, | |
3292 | size_t reloc_count, | |
3293 | Output_section* output_section, | |
3294 | bool needs_special_offset_handling, | |
3295 | size_t local_symbol_count, | |
3296 | const unsigned char* plocal_symbols, | |
3297 | Relocatable_relocs*); | |
3298 | ||
4d625b70 CC |
3299 | // Scan the relocs for --emit-relocs. |
3300 | void | |
3301 | emit_relocs_scan(Symbol_table* symtab, | |
3302 | Layout* layout, | |
3303 | Sized_relobj_file<size, big_endian>* object, | |
3304 | unsigned int data_shndx, | |
3305 | unsigned int sh_type, | |
3306 | const unsigned char* prelocs, | |
3307 | size_t reloc_count, | |
3308 | Output_section* output_section, | |
3309 | bool needs_special_offset_handling, | |
3310 | size_t local_symbol_count, | |
3311 | const unsigned char* plocal_syms, | |
3312 | Relocatable_relocs* rr); | |
3313 | ||
9810d34d SS |
3314 | // Emit relocations for a section. |
3315 | void | |
3316 | relocate_relocs(const Relocate_info<size, big_endian>*, | |
3317 | unsigned int sh_type, | |
3318 | const unsigned char* prelocs, | |
3319 | size_t reloc_count, | |
3320 | Output_section* output_section, | |
3321 | typename elfcpp::Elf_types<size>::Elf_Off | |
3322 | offset_in_output_section, | |
9810d34d SS |
3323 | unsigned char* view, |
3324 | Mips_address view_address, | |
3325 | section_size_type view_size, | |
3326 | unsigned char* reloc_view, | |
3327 | section_size_type reloc_view_size); | |
3328 | ||
3329 | // Perform target-specific processing in a relocatable link. This is | |
3330 | // only used if we use the relocation strategy RELOC_SPECIAL. | |
3331 | void | |
3332 | relocate_special_relocatable(const Relocate_info<size, big_endian>* relinfo, | |
3333 | unsigned int sh_type, | |
3334 | const unsigned char* preloc_in, | |
3335 | size_t relnum, | |
3336 | Output_section* output_section, | |
3337 | typename elfcpp::Elf_types<size>::Elf_Off | |
3338 | offset_in_output_section, | |
3339 | unsigned char* view, | |
3340 | Mips_address view_address, | |
3341 | section_size_type view_size, | |
3342 | unsigned char* preloc_out); | |
3343 | ||
3344 | // Return whether SYM is defined by the ABI. | |
3345 | bool | |
3346 | do_is_defined_by_abi(const Symbol* sym) const | |
3347 | { | |
3348 | return ((strcmp(sym->name(), "__gnu_local_gp") == 0) | |
3349 | || (strcmp(sym->name(), "_gp_disp") == 0) | |
3350 | || (strcmp(sym->name(), "___tls_get_addr") == 0)); | |
3351 | } | |
3352 | ||
3353 | // Return the number of entries in the GOT. | |
3354 | unsigned int | |
3355 | got_entry_count() const | |
3356 | { | |
3357 | if (!this->has_got_section()) | |
3358 | return 0; | |
3359 | return this->got_size() / (size/8); | |
3360 | } | |
3361 | ||
3362 | // Return the number of entries in the PLT. | |
3363 | unsigned int | |
3364 | plt_entry_count() const | |
3365 | { | |
3366 | if (this->plt_ == NULL) | |
3367 | return 0; | |
3368 | return this->plt_->entry_count(); | |
3369 | } | |
3370 | ||
3371 | // Return the offset of the first non-reserved PLT entry. | |
3372 | unsigned int | |
3373 | first_plt_entry_offset() const | |
3374 | { return this->plt_->first_plt_entry_offset(); } | |
3375 | ||
3376 | // Return the size of each PLT entry. | |
3377 | unsigned int | |
3378 | plt_entry_size() const | |
3379 | { return this->plt_->plt_entry_size(); } | |
3380 | ||
3381 | // Get the GOT section, creating it if necessary. | |
3382 | Mips_output_data_got<size, big_endian>* | |
3383 | got_section(Symbol_table*, Layout*); | |
3384 | ||
3385 | // Get the GOT section. | |
3386 | Mips_output_data_got<size, big_endian>* | |
3387 | got_section() const | |
3388 | { | |
3389 | gold_assert(this->got_ != NULL); | |
3390 | return this->got_; | |
3391 | } | |
3392 | ||
3393 | // Get the .MIPS.stubs section, creating it if necessary. | |
3394 | Mips_output_data_mips_stubs<size, big_endian>* | |
3395 | mips_stubs_section(Layout* layout); | |
3396 | ||
3397 | // Get the .MIPS.stubs section. | |
3398 | Mips_output_data_mips_stubs<size, big_endian>* | |
3399 | mips_stubs_section() const | |
3400 | { | |
3401 | gold_assert(this->mips_stubs_ != NULL); | |
3402 | return this->mips_stubs_; | |
3403 | } | |
3404 | ||
3405 | // Get the LA25 stub section, creating it if necessary. | |
3406 | Mips_output_data_la25_stub<size, big_endian>* | |
3407 | la25_stub_section(Layout*); | |
3408 | ||
3409 | // Get the LA25 stub section. | |
3410 | Mips_output_data_la25_stub<size, big_endian>* | |
3411 | la25_stub_section() | |
3412 | { | |
3413 | gold_assert(this->la25_stub_ != NULL); | |
3414 | return this->la25_stub_; | |
3415 | } | |
3416 | ||
3417 | // Get gp value. It has the value of .got + 0x7FF0. | |
3418 | Mips_address | |
3419 | gp_value() const | |
3420 | { | |
3421 | if (this->gp_ != NULL) | |
3422 | return this->gp_->value(); | |
3423 | return 0; | |
3424 | } | |
3425 | ||
3426 | // Get gp value. It has the value of .got + 0x7FF0. Adjust it for | |
3427 | // multi-GOT links so that OBJECT's GOT + 0x7FF0 is returned. | |
3428 | Mips_address | |
3429 | adjusted_gp_value(const Mips_relobj<size, big_endian>* object) | |
3430 | { | |
3431 | if (this->gp_ == NULL) | |
3432 | return 0; | |
3433 | ||
3434 | bool multi_got = false; | |
3435 | if (this->has_got_section()) | |
3436 | multi_got = this->got_section()->multi_got(); | |
3437 | if (!multi_got) | |
3438 | return this->gp_->value(); | |
3439 | else | |
3440 | return this->gp_->value() + this->got_section()->get_got_offset(object); | |
3441 | } | |
3442 | ||
3443 | // Get the dynamic reloc section, creating it if necessary. | |
3444 | Reloc_section* | |
3445 | rel_dyn_section(Layout*); | |
3446 | ||
3447 | bool | |
3448 | do_has_custom_set_dynsym_indexes() const | |
3449 | { return true; } | |
3450 | ||
3451 | // Don't emit input .reginfo sections to output .reginfo. | |
3452 | bool | |
3453 | do_should_include_section(elfcpp::Elf_Word sh_type) const | |
3454 | { return sh_type != elfcpp::SHT_MIPS_REGINFO; } | |
3455 | ||
3456 | // Set the dynamic symbol indexes. INDEX is the index of the first | |
3457 | // global dynamic symbol. Pointers to the symbols are stored into the | |
3458 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
3459 | // updated dynamic symbol index. | |
3460 | unsigned int | |
3461 | do_set_dynsym_indexes(std::vector<Symbol*>* dyn_symbols, unsigned int index, | |
3462 | std::vector<Symbol*>* syms, Stringpool* dynpool, | |
3463 | Versions* versions, Symbol_table* symtab) const; | |
3464 | ||
3465 | // Remove .MIPS.stubs entry for a symbol. | |
3466 | void | |
3467 | remove_lazy_stub_entry(Mips_symbol<size>* sym) | |
3468 | { | |
3469 | if (this->mips_stubs_ != NULL) | |
3470 | this->mips_stubs_->remove_entry(sym); | |
3471 | } | |
3472 | ||
3473 | // The value to write into got[1] for SVR4 targets, to identify it is | |
3474 | // a GNU object. The dynamic linker can then use got[1] to store the | |
3475 | // module pointer. | |
3476 | uint64_t | |
3477 | mips_elf_gnu_got1_mask() | |
3478 | { | |
3479 | if (this->is_output_n64()) | |
3480 | return (uint64_t)1 << 63; | |
3481 | else | |
3482 | return 1 << 31; | |
3483 | } | |
3484 | ||
3485 | // Whether the output has microMIPS code. This is valid only after | |
3486 | // merge_processor_specific_flags() is called. | |
3487 | bool | |
3488 | is_output_micromips() const | |
3489 | { | |
3490 | gold_assert(this->are_processor_specific_flags_set()); | |
3491 | return elfcpp::is_micromips(this->processor_specific_flags()); | |
3492 | } | |
3493 | ||
3494 | // Whether the output uses N32 ABI. This is valid only after | |
3495 | // merge_processor_specific_flags() is called. | |
3496 | bool | |
3497 | is_output_n32() const | |
3498 | { | |
3499 | gold_assert(this->are_processor_specific_flags_set()); | |
3500 | return elfcpp::abi_n32(this->processor_specific_flags()); | |
3501 | } | |
3502 | ||
01b84e25 | 3503 | // Whether the output uses N64 ABI. |
9810d34d SS |
3504 | bool |
3505 | is_output_n64() const | |
01b84e25 | 3506 | { return size == 64; } |
9810d34d SS |
3507 | |
3508 | // Whether the output uses NEWABI. This is valid only after | |
3509 | // merge_processor_specific_flags() is called. | |
3510 | bool | |
3511 | is_output_newabi() const | |
3512 | { return this->is_output_n32() || this->is_output_n64(); } | |
3513 | ||
3514 | // Whether we can only use 32-bit microMIPS instructions. | |
3515 | bool | |
3516 | use_32bit_micromips_instructions() const | |
3517 | { return this->insn32_; } | |
3518 | ||
4d625b70 CC |
3519 | // Return the r_sym field from a relocation. |
3520 | unsigned int | |
3521 | get_r_sym(const unsigned char* preloc) const | |
3522 | { | |
3523 | // Since REL and RELA relocs share the same structure through | |
3524 | // the r_info field, we can just use REL here. | |
3525 | Reltype rel(preloc); | |
3526 | return Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: | |
3527 | get_r_sym(&rel); | |
3528 | } | |
3529 | ||
9810d34d SS |
3530 | protected: |
3531 | // Return the value to use for a dynamic symbol which requires special | |
3532 | // treatment. This is how we support equality comparisons of function | |
3533 | // pointers across shared library boundaries, as described in the | |
3534 | // processor specific ABI supplement. | |
3535 | uint64_t | |
3536 | do_dynsym_value(const Symbol* gsym) const; | |
3537 | ||
3538 | // Make an ELF object. | |
3539 | Object* | |
3540 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
3541 | const elfcpp::Ehdr<size, big_endian>& ehdr); | |
3542 | ||
3543 | Object* | |
3544 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
3545 | const elfcpp::Ehdr<size, !big_endian>&) | |
3546 | { gold_unreachable(); } | |
3547 | ||
3548 | // Make an output section. | |
3549 | Output_section* | |
3550 | do_make_output_section(const char* name, elfcpp::Elf_Word type, | |
3551 | elfcpp::Elf_Xword flags) | |
3552 | { | |
3553 | if (type == elfcpp::SHT_MIPS_REGINFO) | |
3554 | return new Mips_output_section_reginfo<size, big_endian>(name, type, | |
3555 | flags, this); | |
3556 | else | |
3557 | return new Output_section(name, type, flags); | |
3558 | } | |
3559 | ||
3560 | // Adjust ELF file header. | |
3561 | void | |
3562 | do_adjust_elf_header(unsigned char* view, int len); | |
3563 | ||
3564 | // Get the custom dynamic tag value. | |
3565 | unsigned int | |
3566 | do_dynamic_tag_custom_value(elfcpp::DT) const; | |
3567 | ||
3568 | // Adjust the value written to the dynamic symbol table. | |
3569 | virtual void | |
3570 | do_adjust_dyn_symbol(const Symbol* sym, unsigned char* view) const | |
3571 | { | |
3572 | elfcpp::Sym<size, big_endian> isym(view); | |
3573 | elfcpp::Sym_write<size, big_endian> osym(view); | |
3574 | const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(sym); | |
3575 | ||
3576 | // Keep dynamic compressed symbols odd. This allows the dynamic linker | |
3577 | // to treat compressed symbols like any other. | |
3578 | Mips_address value = isym.get_st_value(); | |
3579 | if (mips_sym->is_mips16() && value != 0) | |
3580 | { | |
3581 | if (!mips_sym->has_mips16_fn_stub()) | |
3582 | value |= 1; | |
3583 | else | |
3584 | { | |
3585 | // If we have a MIPS16 function with a stub, the dynamic symbol | |
3586 | // must refer to the stub, since only the stub uses the standard | |
3587 | // calling conventions. Stub contains MIPS32 code, so don't add +1 | |
3588 | // in this case. | |
3589 | ||
3590 | // There is a code which does this in the method | |
3591 | // Target_mips::do_dynsym_value, but that code will only be | |
3592 | // executed if the symbol is from dynobj. | |
3593 | // TODO(sasa): GNU ld also changes the value in non-dynamic symbol | |
3594 | // table. | |
3595 | ||
3596 | Mips16_stub_section<size, big_endian>* fn_stub = | |
3597 | mips_sym->template get_mips16_fn_stub<big_endian>(); | |
3598 | value = fn_stub->output_address(); | |
3599 | osym.put_st_size(fn_stub->section_size()); | |
3600 | } | |
3601 | ||
3602 | osym.put_st_value(value); | |
3603 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), | |
3604 | mips_sym->nonvis() - (elfcpp::STO_MIPS16 >> 2))); | |
3605 | } | |
3606 | else if ((mips_sym->is_micromips() | |
3607 | // Stubs are always microMIPS if there is any microMIPS code in | |
3608 | // the output. | |
3609 | || (this->is_output_micromips() && mips_sym->has_lazy_stub())) | |
3610 | && value != 0) | |
3611 | { | |
3612 | osym.put_st_value(value | 1); | |
3613 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), | |
3614 | mips_sym->nonvis() - (elfcpp::STO_MICROMIPS >> 2))); | |
3615 | } | |
3616 | } | |
3617 | ||
3618 | private: | |
3619 | // The class which scans relocations. | |
3620 | class Scan | |
3621 | { | |
3622 | public: | |
3623 | Scan() | |
3624 | { } | |
3625 | ||
3626 | static inline int | |
3627 | get_reference_flags(unsigned int r_type); | |
3628 | ||
3629 | inline void | |
3630 | local(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3631 | Sized_relobj_file<size, big_endian>* object, | |
3632 | unsigned int data_shndx, | |
3633 | Output_section* output_section, | |
4d625b70 | 3634 | const Reltype& reloc, unsigned int r_type, |
9810d34d SS |
3635 | const elfcpp::Sym<size, big_endian>& lsym, |
3636 | bool is_discarded); | |
3637 | ||
3638 | inline void | |
3639 | local(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3640 | Sized_relobj_file<size, big_endian>* object, | |
3641 | unsigned int data_shndx, | |
3642 | Output_section* output_section, | |
4d625b70 | 3643 | const Relatype& reloc, unsigned int r_type, |
9810d34d SS |
3644 | const elfcpp::Sym<size, big_endian>& lsym, |
3645 | bool is_discarded); | |
3646 | ||
3647 | inline void | |
3648 | local(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3649 | Sized_relobj_file<size, big_endian>* object, | |
3650 | unsigned int data_shndx, | |
3651 | Output_section* output_section, | |
4d625b70 CC |
3652 | const Relatype* rela, |
3653 | const Reltype* rel, | |
9810d34d SS |
3654 | unsigned int rel_type, |
3655 | unsigned int r_type, | |
3656 | const elfcpp::Sym<size, big_endian>& lsym, | |
3657 | bool is_discarded); | |
3658 | ||
3659 | inline void | |
3660 | global(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3661 | Sized_relobj_file<size, big_endian>* object, | |
3662 | unsigned int data_shndx, | |
3663 | Output_section* output_section, | |
4d625b70 | 3664 | const Reltype& reloc, unsigned int r_type, |
9810d34d SS |
3665 | Symbol* gsym); |
3666 | ||
3667 | inline void | |
3668 | global(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3669 | Sized_relobj_file<size, big_endian>* object, | |
3670 | unsigned int data_shndx, | |
3671 | Output_section* output_section, | |
4d625b70 | 3672 | const Relatype& reloc, unsigned int r_type, |
9810d34d SS |
3673 | Symbol* gsym); |
3674 | ||
3675 | inline void | |
3676 | global(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3677 | Sized_relobj_file<size, big_endian>* object, | |
3678 | unsigned int data_shndx, | |
3679 | Output_section* output_section, | |
4d625b70 CC |
3680 | const Relatype* rela, |
3681 | const Reltype* rel, | |
9810d34d SS |
3682 | unsigned int rel_type, |
3683 | unsigned int r_type, | |
3684 | Symbol* gsym); | |
3685 | ||
3686 | inline bool | |
3687 | local_reloc_may_be_function_pointer(Symbol_table* , Layout*, | |
3688 | Target_mips*, | |
3689 | Sized_relobj_file<size, big_endian>*, | |
3690 | unsigned int, | |
3691 | Output_section*, | |
4d625b70 | 3692 | const Reltype&, |
9810d34d SS |
3693 | unsigned int, |
3694 | const elfcpp::Sym<size, big_endian>&) | |
3695 | { return false; } | |
3696 | ||
3697 | inline bool | |
3698 | global_reloc_may_be_function_pointer(Symbol_table*, Layout*, | |
3699 | Target_mips*, | |
3700 | Sized_relobj_file<size, big_endian>*, | |
3701 | unsigned int, | |
3702 | Output_section*, | |
4d625b70 | 3703 | const Reltype&, |
9810d34d SS |
3704 | unsigned int, Symbol*) |
3705 | { return false; } | |
3706 | ||
3707 | inline bool | |
3708 | local_reloc_may_be_function_pointer(Symbol_table*, Layout*, | |
3709 | Target_mips*, | |
3710 | Sized_relobj_file<size, big_endian>*, | |
3711 | unsigned int, | |
3712 | Output_section*, | |
4d625b70 | 3713 | const Relatype&, |
9810d34d SS |
3714 | unsigned int, |
3715 | const elfcpp::Sym<size, big_endian>&) | |
3716 | { return false; } | |
3717 | ||
3718 | inline bool | |
3719 | global_reloc_may_be_function_pointer(Symbol_table*, Layout*, | |
3720 | Target_mips*, | |
3721 | Sized_relobj_file<size, big_endian>*, | |
3722 | unsigned int, | |
3723 | Output_section*, | |
4d625b70 | 3724 | const Relatype&, |
9810d34d SS |
3725 | unsigned int, Symbol*) |
3726 | { return false; } | |
3727 | private: | |
3728 | static void | |
3729 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, | |
3730 | unsigned int r_type); | |
3731 | ||
3732 | static void | |
3733 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, | |
3734 | unsigned int r_type, Symbol*); | |
3735 | }; | |
3736 | ||
3737 | // The class which implements relocation. | |
3738 | class Relocate | |
3739 | { | |
3740 | public: | |
3741 | Relocate() | |
3742 | { } | |
3743 | ||
3744 | ~Relocate() | |
3745 | { } | |
3746 | ||
47a9f4fc | 3747 | // Return whether a R_MIPS_32/R_MIPS_64 relocation needs to be applied. |
9810d34d | 3748 | inline bool |
47a9f4fc VR |
3749 | should_apply_static_reloc(const Mips_symbol<size>* gsym, |
3750 | unsigned int r_type, | |
3751 | Output_section* output_section, | |
3752 | Target_mips* target); | |
9810d34d SS |
3753 | |
3754 | // Do a relocation. Return false if the caller should not issue | |
3755 | // any warnings about this relocation. | |
3756 | inline bool | |
91a65d2f AM |
3757 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
3758 | Target_mips*, Output_section*, size_t, const unsigned char*, | |
3759 | const Sized_symbol<size>*, const Symbol_value<size>*, | |
3760 | unsigned char*, Mips_address, section_size_type); | |
9810d34d SS |
3761 | }; |
3762 | ||
9810d34d SS |
3763 | // This POD class holds the dynamic relocations that should be emitted instead |
3764 | // of R_MIPS_32, R_MIPS_REL32 and R_MIPS_64 relocations. We will emit these | |
3765 | // relocations if it turns out that the symbol does not have static | |
3766 | // relocations. | |
3767 | class Dyn_reloc | |
3768 | { | |
3769 | public: | |
3770 | Dyn_reloc(Mips_symbol<size>* sym, unsigned int r_type, | |
3771 | Mips_relobj<size, big_endian>* relobj, unsigned int shndx, | |
3772 | Output_section* output_section, Mips_address r_offset) | |
3773 | : sym_(sym), r_type_(r_type), relobj_(relobj), | |
3774 | shndx_(shndx), output_section_(output_section), | |
3775 | r_offset_(r_offset) | |
3776 | { } | |
3777 | ||
3778 | // Emit this reloc if appropriate. This is called after we have | |
3779 | // scanned all the relocations, so we know whether the symbol has | |
3780 | // static relocations. | |
3781 | void | |
3782 | emit(Reloc_section* rel_dyn, Mips_output_data_got<size, big_endian>* got, | |
3783 | Symbol_table* symtab) | |
3784 | { | |
3785 | if (!this->sym_->has_static_relocs()) | |
3786 | { | |
3787 | got->record_global_got_symbol(this->sym_, this->relobj_, | |
3788 | this->r_type_, true, false); | |
3789 | if (!symbol_references_local(this->sym_, | |
3790 | this->sym_->should_add_dynsym_entry(symtab))) | |
3791 | rel_dyn->add_global(this->sym_, this->r_type_, | |
3792 | this->output_section_, this->relobj_, | |
3793 | this->shndx_, this->r_offset_); | |
3794 | else | |
3795 | rel_dyn->add_symbolless_global_addend(this->sym_, this->r_type_, | |
3796 | this->output_section_, this->relobj_, | |
3797 | this->shndx_, this->r_offset_); | |
3798 | } | |
3799 | } | |
3800 | ||
3801 | private: | |
3802 | Mips_symbol<size>* sym_; | |
3803 | unsigned int r_type_; | |
3804 | Mips_relobj<size, big_endian>* relobj_; | |
3805 | unsigned int shndx_; | |
3806 | Output_section* output_section_; | |
3807 | Mips_address r_offset_; | |
3808 | }; | |
3809 | ||
3810 | // Adjust TLS relocation type based on the options and whether this | |
3811 | // is a local symbol. | |
3812 | static tls::Tls_optimization | |
3813 | optimize_tls_reloc(bool is_final, int r_type); | |
3814 | ||
3815 | // Return whether there is a GOT section. | |
3816 | bool | |
3817 | has_got_section() const | |
3818 | { return this->got_ != NULL; } | |
3819 | ||
3820 | // Check whether the given ELF header flags describe a 32-bit binary. | |
3821 | bool | |
3822 | mips_32bit_flags(elfcpp::Elf_Word); | |
3823 | ||
3824 | enum Mips_mach { | |
3825 | mach_mips3000 = 3000, | |
3826 | mach_mips3900 = 3900, | |
3827 | mach_mips4000 = 4000, | |
3828 | mach_mips4010 = 4010, | |
3829 | mach_mips4100 = 4100, | |
3830 | mach_mips4111 = 4111, | |
3831 | mach_mips4120 = 4120, | |
3832 | mach_mips4300 = 4300, | |
3833 | mach_mips4400 = 4400, | |
3834 | mach_mips4600 = 4600, | |
3835 | mach_mips4650 = 4650, | |
3836 | mach_mips5000 = 5000, | |
3837 | mach_mips5400 = 5400, | |
3838 | mach_mips5500 = 5500, | |
3839 | mach_mips6000 = 6000, | |
3840 | mach_mips7000 = 7000, | |
3841 | mach_mips8000 = 8000, | |
3842 | mach_mips9000 = 9000, | |
3843 | mach_mips10000 = 10000, | |
3844 | mach_mips12000 = 12000, | |
3845 | mach_mips14000 = 14000, | |
3846 | mach_mips16000 = 16000, | |
3847 | mach_mips16 = 16, | |
3848 | mach_mips5 = 5, | |
3849 | mach_mips_loongson_2e = 3001, | |
3850 | mach_mips_loongson_2f = 3002, | |
3851 | mach_mips_loongson_3a = 3003, | |
3852 | mach_mips_sb1 = 12310201, // octal 'SB', 01 | |
3853 | mach_mips_octeon = 6501, | |
3854 | mach_mips_octeonp = 6601, | |
3855 | mach_mips_octeon2 = 6502, | |
3856 | mach_mips_xlr = 887682, // decimal 'XLR' | |
3857 | mach_mipsisa32 = 32, | |
3858 | mach_mipsisa32r2 = 33, | |
3859 | mach_mipsisa64 = 64, | |
3860 | mach_mipsisa64r2 = 65, | |
3861 | mach_mips_micromips = 96 | |
3862 | }; | |
3863 | ||
3864 | // Return the MACH for a MIPS e_flags value. | |
3865 | unsigned int | |
3866 | elf_mips_mach(elfcpp::Elf_Word); | |
3867 | ||
3868 | // Check whether machine EXTENSION is an extension of machine BASE. | |
3869 | bool | |
3870 | mips_mach_extends(unsigned int, unsigned int); | |
3871 | ||
3872 | // Merge processor specific flags. | |
3873 | void | |
01b84e25 | 3874 | merge_processor_specific_flags(const std::string&, elfcpp::Elf_Word, bool); |
9810d34d SS |
3875 | |
3876 | // True if we are linking for CPUs that are faster if JAL is converted to BAL. | |
3877 | static inline bool | |
3878 | jal_to_bal() | |
3879 | { return false; } | |
3880 | ||
3881 | // True if we are linking for CPUs that are faster if JALR is converted to | |
3882 | // BAL. This should be safe for all architectures. We enable this predicate | |
3883 | // for all CPUs. | |
3884 | static inline bool | |
3885 | jalr_to_bal() | |
3886 | { return true; } | |
3887 | ||
3888 | // True if we are linking for CPUs that are faster if JR is converted to B. | |
3889 | // This should be safe for all architectures. We enable this predicate for | |
3890 | // all CPUs. | |
3891 | static inline bool | |
3892 | jr_to_b() | |
3893 | { return true; } | |
3894 | ||
3895 | // Return the size of the GOT section. | |
3896 | section_size_type | |
3897 | got_size() const | |
3898 | { | |
3899 | gold_assert(this->got_ != NULL); | |
3900 | return this->got_->data_size(); | |
3901 | } | |
3902 | ||
3903 | // Create a PLT entry for a global symbol referenced by r_type relocation. | |
3904 | void | |
3905 | make_plt_entry(Symbol_table*, Layout*, Mips_symbol<size>*, | |
3906 | unsigned int r_type); | |
3907 | ||
3908 | // Get the PLT section. | |
3909 | Mips_output_data_plt<size, big_endian>* | |
3910 | plt_section() const | |
3911 | { | |
3912 | gold_assert(this->plt_ != NULL); | |
3913 | return this->plt_; | |
3914 | } | |
3915 | ||
3916 | // Get the GOT PLT section. | |
3917 | const Mips_output_data_plt<size, big_endian>* | |
3918 | got_plt_section() const | |
3919 | { | |
3920 | gold_assert(this->got_plt_ != NULL); | |
3921 | return this->got_plt_; | |
3922 | } | |
3923 | ||
3924 | // Copy a relocation against a global symbol. | |
3925 | void | |
3926 | copy_reloc(Symbol_table* symtab, Layout* layout, | |
3927 | Sized_relobj_file<size, big_endian>* object, | |
3928 | unsigned int shndx, Output_section* output_section, | |
47a9f4fc | 3929 | Symbol* sym, unsigned int r_type, Mips_address r_offset) |
9810d34d SS |
3930 | { |
3931 | this->copy_relocs_.copy_reloc(symtab, layout, | |
3932 | symtab->get_sized_symbol<size>(sym), | |
3933 | object, shndx, output_section, | |
47a9f4fc | 3934 | r_type, r_offset, 0, |
859d7987 | 3935 | this->rel_dyn_section(layout)); |
9810d34d SS |
3936 | } |
3937 | ||
3938 | void | |
3939 | dynamic_reloc(Mips_symbol<size>* sym, unsigned int r_type, | |
3940 | Mips_relobj<size, big_endian>* relobj, | |
3941 | unsigned int shndx, Output_section* output_section, | |
3942 | Mips_address r_offset) | |
3943 | { | |
3944 | this->dyn_relocs_.push_back(Dyn_reloc(sym, r_type, relobj, shndx, | |
3945 | output_section, r_offset)); | |
3946 | } | |
3947 | ||
3948 | // Calculate value of _gp symbol. | |
3949 | void | |
3950 | set_gp(Layout*, Symbol_table*); | |
3951 | ||
3952 | const char* | |
01b84e25 | 3953 | elf_mips_abi_name(elfcpp::Elf_Word e_flags); |
9810d34d SS |
3954 | const char* |
3955 | elf_mips_mach_name(elfcpp::Elf_Word e_flags); | |
3956 | ||
3957 | // Adds entries that describe how machines relate to one another. The entries | |
3958 | // are ordered topologically with MIPS I extensions listed last. First | |
3959 | // element is extension, second element is base. | |
3960 | void | |
3961 | add_machine_extensions() | |
3962 | { | |
3963 | // MIPS64r2 extensions. | |
3964 | this->add_extension(mach_mips_octeon2, mach_mips_octeonp); | |
3965 | this->add_extension(mach_mips_octeonp, mach_mips_octeon); | |
3966 | this->add_extension(mach_mips_octeon, mach_mipsisa64r2); | |
3967 | ||
3968 | // MIPS64 extensions. | |
3969 | this->add_extension(mach_mipsisa64r2, mach_mipsisa64); | |
3970 | this->add_extension(mach_mips_sb1, mach_mipsisa64); | |
3971 | this->add_extension(mach_mips_xlr, mach_mipsisa64); | |
3972 | this->add_extension(mach_mips_loongson_3a, mach_mipsisa64); | |
3973 | ||
3974 | // MIPS V extensions. | |
3975 | this->add_extension(mach_mipsisa64, mach_mips5); | |
3976 | ||
3977 | // R10000 extensions. | |
3978 | this->add_extension(mach_mips12000, mach_mips10000); | |
3979 | this->add_extension(mach_mips14000, mach_mips10000); | |
3980 | this->add_extension(mach_mips16000, mach_mips10000); | |
3981 | ||
3982 | // R5000 extensions. Note: the vr5500 ISA is an extension of the core | |
3983 | // vr5400 ISA, but doesn't include the multimedia stuff. It seems | |
3984 | // better to allow vr5400 and vr5500 code to be merged anyway, since | |
3985 | // many libraries will just use the core ISA. Perhaps we could add | |
3986 | // some sort of ASE flag if this ever proves a problem. | |
3987 | this->add_extension(mach_mips5500, mach_mips5400); | |
3988 | this->add_extension(mach_mips5400, mach_mips5000); | |
3989 | ||
3990 | // MIPS IV extensions. | |
3991 | this->add_extension(mach_mips5, mach_mips8000); | |
3992 | this->add_extension(mach_mips10000, mach_mips8000); | |
3993 | this->add_extension(mach_mips5000, mach_mips8000); | |
3994 | this->add_extension(mach_mips7000, mach_mips8000); | |
3995 | this->add_extension(mach_mips9000, mach_mips8000); | |
3996 | ||
3997 | // VR4100 extensions. | |
3998 | this->add_extension(mach_mips4120, mach_mips4100); | |
3999 | this->add_extension(mach_mips4111, mach_mips4100); | |
4000 | ||
4001 | // MIPS III extensions. | |
4002 | this->add_extension(mach_mips_loongson_2e, mach_mips4000); | |
4003 | this->add_extension(mach_mips_loongson_2f, mach_mips4000); | |
4004 | this->add_extension(mach_mips8000, mach_mips4000); | |
4005 | this->add_extension(mach_mips4650, mach_mips4000); | |
4006 | this->add_extension(mach_mips4600, mach_mips4000); | |
4007 | this->add_extension(mach_mips4400, mach_mips4000); | |
4008 | this->add_extension(mach_mips4300, mach_mips4000); | |
4009 | this->add_extension(mach_mips4100, mach_mips4000); | |
4010 | this->add_extension(mach_mips4010, mach_mips4000); | |
4011 | ||
4012 | // MIPS32 extensions. | |
4013 | this->add_extension(mach_mipsisa32r2, mach_mipsisa32); | |
4014 | ||
4015 | // MIPS II extensions. | |
4016 | this->add_extension(mach_mips4000, mach_mips6000); | |
4017 | this->add_extension(mach_mipsisa32, mach_mips6000); | |
4018 | ||
4019 | // MIPS I extensions. | |
4020 | this->add_extension(mach_mips6000, mach_mips3000); | |
4021 | this->add_extension(mach_mips3900, mach_mips3000); | |
4022 | } | |
4023 | ||
4024 | // Add value to MIPS extenstions. | |
4025 | void | |
4026 | add_extension(unsigned int base, unsigned int extension) | |
4027 | { | |
4028 | std::pair<unsigned int, unsigned int> ext(base, extension); | |
4029 | this->mips_mach_extensions_.push_back(ext); | |
4030 | } | |
4031 | ||
4032 | // Return the number of entries in the .dynsym section. | |
4033 | unsigned int get_dt_mips_symtabno() const | |
4034 | { | |
4035 | return ((unsigned int)(this->layout_->dynsym_section()->data_size() | |
4036 | / elfcpp::Elf_sizes<size>::sym_size)); | |
4037 | // TODO(sasa): Entry size is MIPS_ELF_SYM_SIZE. | |
4038 | } | |
4039 | ||
4040 | // Information about this specific target which we pass to the | |
4041 | // general Target structure. | |
62661c93 | 4042 | static const Target::Target_info mips_info; |
9810d34d SS |
4043 | // The GOT section. |
4044 | Mips_output_data_got<size, big_endian>* got_; | |
4045 | // gp symbol. It has the value of .got + 0x7FF0. | |
4046 | Sized_symbol<size>* gp_; | |
4047 | // The PLT section. | |
4048 | Mips_output_data_plt<size, big_endian>* plt_; | |
4049 | // The GOT PLT section. | |
4050 | Output_data_space* got_plt_; | |
4051 | // The dynamic reloc section. | |
4052 | Reloc_section* rel_dyn_; | |
4053 | // Relocs saved to avoid a COPY reloc. | |
4054 | Mips_copy_relocs<elfcpp::SHT_REL, size, big_endian> copy_relocs_; | |
4055 | ||
4056 | // A list of dyn relocs to be saved. | |
4057 | std::vector<Dyn_reloc> dyn_relocs_; | |
4058 | ||
4059 | // The LA25 stub section. | |
4060 | Mips_output_data_la25_stub<size, big_endian>* la25_stub_; | |
4061 | // Architecture extensions. | |
4062 | std::vector<std::pair<unsigned int, unsigned int> > mips_mach_extensions_; | |
4063 | // .MIPS.stubs | |
4064 | Mips_output_data_mips_stubs<size, big_endian>* mips_stubs_; | |
4065 | ||
9810d34d SS |
4066 | unsigned int mach_; |
4067 | Layout* layout_; | |
4068 | ||
4069 | typename std::list<got16_addend<size, big_endian> > got16_addends_; | |
4070 | ||
4071 | // Whether the entry symbol is mips16 or micromips. | |
4072 | bool entry_symbol_is_compressed_; | |
4073 | ||
4074 | // Whether we can use only 32-bit microMIPS instructions. | |
4075 | // TODO(sasa): This should be a linker option. | |
4076 | bool insn32_; | |
4077 | }; | |
4078 | ||
9810d34d SS |
4079 | // Helper structure for R_MIPS*_HI16/LO16 and R_MIPS*_GOT16/LO16 relocations. |
4080 | // It records high part of the relocation pair. | |
4081 | ||
4082 | template<int size, bool big_endian> | |
4083 | struct reloc_high | |
4084 | { | |
4085 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
4086 | ||
4087 | reloc_high(unsigned char* _view, const Mips_relobj<size, big_endian>* _object, | |
4088 | const Symbol_value<size>* _psymval, Mips_address _addend, | |
3d0064a9 | 4089 | unsigned int _r_type, unsigned int _r_sym, bool _extract_addend, |
9810d34d SS |
4090 | Mips_address _address = 0, bool _gp_disp = false) |
4091 | : view(_view), object(_object), psymval(_psymval), addend(_addend), | |
3d0064a9 CC |
4092 | r_type(_r_type), r_sym(_r_sym), extract_addend(_extract_addend), |
4093 | address(_address), gp_disp(_gp_disp) | |
9810d34d SS |
4094 | { } |
4095 | ||
4096 | unsigned char* view; | |
4097 | const Mips_relobj<size, big_endian>* object; | |
4098 | const Symbol_value<size>* psymval; | |
4099 | Mips_address addend; | |
4100 | unsigned int r_type; | |
3d0064a9 | 4101 | unsigned int r_sym; |
9810d34d SS |
4102 | bool extract_addend; |
4103 | Mips_address address; | |
4104 | bool gp_disp; | |
4105 | }; | |
4106 | ||
4107 | template<int size, bool big_endian> | |
4108 | class Mips_relocate_functions : public Relocate_functions<size, big_endian> | |
4109 | { | |
4110 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
47a9f4fc | 4111 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; |
9810d34d SS |
4112 | typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype16; |
4113 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32; | |
47a9f4fc | 4114 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype64; |
9810d34d SS |
4115 | |
4116 | public: | |
4117 | typedef enum | |
4118 | { | |
4119 | STATUS_OKAY, // No error during relocation. | |
4120 | STATUS_OVERFLOW, // Relocation overflow. | |
4121 | STATUS_BAD_RELOC // Relocation cannot be applied. | |
4122 | } Status; | |
4123 | ||
4124 | private: | |
4125 | typedef Relocate_functions<size, big_endian> Base; | |
4126 | typedef Mips_relocate_functions<size, big_endian> This; | |
4127 | ||
4128 | static typename std::list<reloc_high<size, big_endian> > hi16_relocs; | |
4129 | static typename std::list<reloc_high<size, big_endian> > got16_relocs; | |
4130 | ||
47a9f4fc VR |
4131 | template<int valsize> |
4132 | static inline typename This::Status | |
4133 | check_overflow(Valtype value) | |
4134 | { | |
4135 | if (size == 32) | |
4136 | return (Bits<valsize>::has_overflow32(value) | |
4137 | ? This::STATUS_OVERFLOW | |
4138 | : This::STATUS_OKAY); | |
4139 | ||
4140 | return (Bits<valsize>::has_overflow(value) | |
4141 | ? This::STATUS_OVERFLOW | |
4142 | : This::STATUS_OKAY); | |
4143 | } | |
4144 | ||
4145 | static inline bool | |
4146 | should_shuffle_micromips_reloc(unsigned int r_type) | |
4147 | { | |
4148 | return (micromips_reloc(r_type) | |
4149 | && r_type != elfcpp::R_MICROMIPS_PC7_S1 | |
4150 | && r_type != elfcpp::R_MICROMIPS_PC10_S1); | |
4151 | } | |
4152 | ||
4153 | public: | |
9810d34d SS |
4154 | // R_MIPS16_26 is used for the mips16 jal and jalx instructions. |
4155 | // Most mips16 instructions are 16 bits, but these instructions | |
4156 | // are 32 bits. | |
4157 | // | |
4158 | // The format of these instructions is: | |
4159 | // | |
4160 | // +--------------+--------------------------------+ | |
4161 | // | JALX | X| Imm 20:16 | Imm 25:21 | | |
4162 | // +--------------+--------------------------------+ | |
4163 | // | Immediate 15:0 | | |
4164 | // +-----------------------------------------------+ | |
4165 | // | |
4166 | // JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx. | |
4167 | // Note that the immediate value in the first word is swapped. | |
4168 | // | |
4169 | // When producing a relocatable object file, R_MIPS16_26 is | |
4170 | // handled mostly like R_MIPS_26. In particular, the addend is | |
4171 | // stored as a straight 26-bit value in a 32-bit instruction. | |
4172 | // (gas makes life simpler for itself by never adjusting a | |
4173 | // R_MIPS16_26 reloc to be against a section, so the addend is | |
4174 | // always zero). However, the 32 bit instruction is stored as 2 | |
4175 | // 16-bit values, rather than a single 32-bit value. In a | |
4176 | // big-endian file, the result is the same; in a little-endian | |
4177 | // file, the two 16-bit halves of the 32 bit value are swapped. | |
4178 | // This is so that a disassembler can recognize the jal | |
4179 | // instruction. | |
4180 | // | |
4181 | // When doing a final link, R_MIPS16_26 is treated as a 32 bit | |
4182 | // instruction stored as two 16-bit values. The addend A is the | |
4183 | // contents of the targ26 field. The calculation is the same as | |
4184 | // R_MIPS_26. When storing the calculated value, reorder the | |
4185 | // immediate value as shown above, and don't forget to store the | |
4186 | // value as two 16-bit values. | |
4187 | // | |
4188 | // To put it in MIPS ABI terms, the relocation field is T-targ26-16, | |
4189 | // defined as | |
4190 | // | |
4191 | // big-endian: | |
4192 | // +--------+----------------------+ | |
4193 | // | | | | |
4194 | // | | targ26-16 | | |
4195 | // |31 26|25 0| | |
4196 | // +--------+----------------------+ | |
4197 | // | |
4198 | // little-endian: | |
4199 | // +----------+------+-------------+ | |
4200 | // | | | | | |
4201 | // | sub1 | | sub2 | | |
4202 | // |0 9|10 15|16 31| | |
4203 | // +----------+--------------------+ | |
4204 | // where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is | |
4205 | // ((sub1 << 16) | sub2)). | |
4206 | // | |
4207 | // When producing a relocatable object file, the calculation is | |
4208 | // (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2) | |
4209 | // When producing a fully linked file, the calculation is | |
4210 | // let R = (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2) | |
4211 | // ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff) | |
4212 | // | |
4213 | // The table below lists the other MIPS16 instruction relocations. | |
4214 | // Each one is calculated in the same way as the non-MIPS16 relocation | |
4215 | // given on the right, but using the extended MIPS16 layout of 16-bit | |
4216 | // immediate fields: | |
4217 | // | |
4218 | // R_MIPS16_GPREL R_MIPS_GPREL16 | |
4219 | // R_MIPS16_GOT16 R_MIPS_GOT16 | |
4220 | // R_MIPS16_CALL16 R_MIPS_CALL16 | |
4221 | // R_MIPS16_HI16 R_MIPS_HI16 | |
4222 | // R_MIPS16_LO16 R_MIPS_LO16 | |
4223 | // | |
4224 | // A typical instruction will have a format like this: | |
4225 | // | |
4226 | // +--------------+--------------------------------+ | |
4227 | // | EXTEND | Imm 10:5 | Imm 15:11 | | |
4228 | // +--------------+--------------------------------+ | |
4229 | // | Major | rx | ry | Imm 4:0 | | |
4230 | // +--------------+--------------------------------+ | |
4231 | // | |
4232 | // EXTEND is the five bit value 11110. Major is the instruction | |
4233 | // opcode. | |
4234 | // | |
4235 | // All we need to do here is shuffle the bits appropriately. | |
4236 | // As above, the two 16-bit halves must be swapped on a | |
4237 | // little-endian system. | |
4238 | ||
4239 | // Similar to MIPS16, the two 16-bit halves in microMIPS must be swapped | |
4240 | // on a little-endian system. This does not apply to R_MICROMIPS_PC7_S1 | |
4241 | // and R_MICROMIPS_PC10_S1 relocs that apply to 16-bit instructions. | |
4242 | ||
9810d34d SS |
4243 | static void |
4244 | mips_reloc_unshuffle(unsigned char* view, unsigned int r_type, | |
4245 | bool jal_shuffle) | |
4246 | { | |
4247 | if (!mips16_reloc(r_type) | |
4248 | && !should_shuffle_micromips_reloc(r_type)) | |
4249 | return; | |
4250 | ||
4251 | // Pick up the first and second halfwords of the instruction. | |
4252 | Valtype16 first = elfcpp::Swap<16, big_endian>::readval(view); | |
4253 | Valtype16 second = elfcpp::Swap<16, big_endian>::readval(view + 2); | |
4254 | Valtype32 val; | |
4255 | ||
4256 | if (micromips_reloc(r_type) | |
4257 | || (r_type == elfcpp::R_MIPS16_26 && !jal_shuffle)) | |
4258 | val = first << 16 | second; | |
4259 | else if (r_type != elfcpp::R_MIPS16_26) | |
4260 | val = (((first & 0xf800) << 16) | ((second & 0xffe0) << 11) | |
4261 | | ((first & 0x1f) << 11) | (first & 0x7e0) | (second & 0x1f)); | |
4262 | else | |
4263 | val = (((first & 0xfc00) << 16) | ((first & 0x3e0) << 11) | |
4264 | | ((first & 0x1f) << 21) | second); | |
4265 | ||
4266 | elfcpp::Swap<32, big_endian>::writeval(view, val); | |
4267 | } | |
4268 | ||
4269 | static void | |
4270 | mips_reloc_shuffle(unsigned char* view, unsigned int r_type, bool jal_shuffle) | |
4271 | { | |
4272 | if (!mips16_reloc(r_type) | |
4273 | && !should_shuffle_micromips_reloc(r_type)) | |
4274 | return; | |
4275 | ||
4276 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
4277 | Valtype16 first, second; | |
4278 | ||
4279 | if (micromips_reloc(r_type) | |
4280 | || (r_type == elfcpp::R_MIPS16_26 && !jal_shuffle)) | |
4281 | { | |
4282 | second = val & 0xffff; | |
4283 | first = val >> 16; | |
4284 | } | |
4285 | else if (r_type != elfcpp::R_MIPS16_26) | |
4286 | { | |
4287 | second = ((val >> 11) & 0xffe0) | (val & 0x1f); | |
4288 | first = ((val >> 16) & 0xf800) | ((val >> 11) & 0x1f) | (val & 0x7e0); | |
4289 | } | |
4290 | else | |
4291 | { | |
4292 | second = val & 0xffff; | |
4293 | first = ((val >> 16) & 0xfc00) | ((val >> 11) & 0x3e0) | |
4294 | | ((val >> 21) & 0x1f); | |
4295 | } | |
4296 | ||
4297 | elfcpp::Swap<16, big_endian>::writeval(view + 2, second); | |
4298 | elfcpp::Swap<16, big_endian>::writeval(view, first); | |
4299 | } | |
4300 | ||
9810d34d SS |
4301 | // R_MIPS_16: S + sign-extend(A) |
4302 | static inline typename This::Status | |
4303 | rel16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4304 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc | 4305 | bool extract_addend, bool calculate_only, Valtype* calculated_value) |
9810d34d | 4306 | { |
9810d34d SS |
4307 | Valtype16* wv = reinterpret_cast<Valtype16*>(view); |
4308 | Valtype16 val = elfcpp::Swap<16, big_endian>::readval(wv); | |
4309 | ||
47a9f4fc VR |
4310 | Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val) |
4311 | : addend_a); | |
9810d34d | 4312 | |
47a9f4fc | 4313 | Valtype x = psymval->value(object, addend); |
9810d34d | 4314 | val = Bits<16>::bit_select32(val, x, 0xffffU); |
47a9f4fc VR |
4315 | |
4316 | if (calculate_only) | |
4317 | { | |
4318 | *calculated_value = x; | |
4319 | return This::STATUS_OKAY; | |
4320 | } | |
4321 | else | |
4322 | elfcpp::Swap<16, big_endian>::writeval(wv, val); | |
4323 | ||
4324 | return check_overflow<16>(x); | |
9810d34d SS |
4325 | } |
4326 | ||
4327 | // R_MIPS_32: S + A | |
4328 | static inline typename This::Status | |
4329 | rel32(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4330 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc | 4331 | bool extract_addend, bool calculate_only, Valtype* calculated_value) |
9810d34d | 4332 | { |
9810d34d | 4333 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
47a9f4fc | 4334 | Valtype addend = (extract_addend |
9810d34d | 4335 | ? elfcpp::Swap<32, big_endian>::readval(wv) |
47a9f4fc VR |
4336 | : addend_a); |
4337 | Valtype x = psymval->value(object, addend); | |
4338 | ||
4339 | if (calculate_only) | |
4340 | *calculated_value = x; | |
4341 | else | |
4342 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
4343 | ||
9810d34d SS |
4344 | return This::STATUS_OKAY; |
4345 | } | |
4346 | ||
4347 | // R_MIPS_JALR, R_MICROMIPS_JALR | |
4348 | static inline typename This::Status | |
4349 | reljalr(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4350 | const Symbol_value<size>* psymval, Mips_address address, | |
4351 | Mips_address addend_a, bool extract_addend, bool cross_mode_jump, | |
47a9f4fc VR |
4352 | unsigned int r_type, bool jalr_to_bal, bool jr_to_b, |
4353 | bool calculate_only, Valtype* calculated_value) | |
9810d34d | 4354 | { |
9810d34d | 4355 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
47a9f4fc | 4356 | Valtype addend = extract_addend ? 0 : addend_a; |
9810d34d SS |
4357 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); |
4358 | ||
4359 | // Try converting J(AL)R to B(AL), if the target is in range. | |
4360 | if (!parameters->options().relocatable() | |
4361 | && r_type == elfcpp::R_MIPS_JALR | |
4362 | && !cross_mode_jump | |
4363 | && ((jalr_to_bal && val == 0x0320f809) // jalr t9 | |
4364 | || (jr_to_b && val == 0x03200008))) // jr t9 | |
4365 | { | |
4366 | int offset = psymval->value(object, addend) - (address + 4); | |
4367 | if (!Bits<18>::has_overflow32(offset)) | |
4368 | { | |
4369 | if (val == 0x03200008) // jr t9 | |
4370 | val = 0x10000000 | (((Valtype32)offset >> 2) & 0xffff); // b addr | |
4371 | else | |
4372 | val = 0x04110000 | (((Valtype32)offset >> 2) & 0xffff); //bal addr | |
4373 | } | |
4374 | } | |
4375 | ||
47a9f4fc VR |
4376 | if (calculate_only) |
4377 | *calculated_value = val; | |
4378 | else | |
4379 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4380 | ||
9810d34d SS |
4381 | return This::STATUS_OKAY; |
4382 | } | |
4383 | ||
4384 | // R_MIPS_PC32: S + A - P | |
4385 | static inline typename This::Status | |
4386 | relpc32(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4387 | const Symbol_value<size>* psymval, Mips_address address, | |
47a9f4fc VR |
4388 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
4389 | Valtype* calculated_value) | |
9810d34d | 4390 | { |
9810d34d | 4391 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
47a9f4fc | 4392 | Valtype addend = (extract_addend |
9810d34d | 4393 | ? elfcpp::Swap<32, big_endian>::readval(wv) |
47a9f4fc VR |
4394 | : addend_a); |
4395 | Valtype x = psymval->value(object, addend) - address; | |
4396 | ||
4397 | if (calculate_only) | |
4398 | *calculated_value = x; | |
4399 | else | |
4400 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
4401 | ||
9810d34d SS |
4402 | return This::STATUS_OKAY; |
4403 | } | |
4404 | ||
4405 | // R_MIPS_26, R_MIPS16_26, R_MICROMIPS_26_S1 | |
4406 | static inline typename This::Status | |
4407 | rel26(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4408 | const Symbol_value<size>* psymval, Mips_address address, | |
4409 | bool local, Mips_address addend_a, bool extract_addend, | |
4410 | const Symbol* gsym, bool cross_mode_jump, unsigned int r_type, | |
47a9f4fc | 4411 | bool jal_to_bal, bool calculate_only, Valtype* calculated_value) |
9810d34d | 4412 | { |
9810d34d SS |
4413 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4414 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4415 | ||
47a9f4fc | 4416 | Valtype addend; |
9810d34d SS |
4417 | if (extract_addend) |
4418 | { | |
4419 | if (r_type == elfcpp::R_MICROMIPS_26_S1) | |
4420 | addend = (val & 0x03ffffff) << 1; | |
4421 | else | |
4422 | addend = (val & 0x03ffffff) << 2; | |
4423 | } | |
4424 | else | |
4425 | addend = addend_a; | |
4426 | ||
4427 | // Make sure the target of JALX is word-aligned. Bit 0 must be | |
4428 | // the correct ISA mode selector and bit 1 must be 0. | |
47a9f4fc | 4429 | if (!calculate_only && cross_mode_jump |
9810d34d SS |
4430 | && (psymval->value(object, 0) & 3) != (r_type == elfcpp::R_MIPS_26)) |
4431 | { | |
4432 | gold_warning(_("JALX to a non-word-aligned address")); | |
9810d34d SS |
4433 | return This::STATUS_BAD_RELOC; |
4434 | } | |
4435 | ||
4436 | // Shift is 2, unusually, for microMIPS JALX. | |
4437 | unsigned int shift = | |
4438 | (!cross_mode_jump && r_type == elfcpp::R_MICROMIPS_26_S1) ? 1 : 2; | |
4439 | ||
47a9f4fc | 4440 | Valtype x; |
9810d34d SS |
4441 | if (local) |
4442 | x = addend | ((address + 4) & (0xfc000000 << shift)); | |
4443 | else | |
4444 | { | |
4445 | if (shift == 1) | |
4446 | x = Bits<27>::sign_extend32(addend); | |
4447 | else | |
4448 | x = Bits<28>::sign_extend32(addend); | |
4449 | } | |
4450 | x = psymval->value(object, x) >> shift; | |
4451 | ||
47a9f4fc | 4452 | if (!calculate_only && !local && !gsym->is_weak_undefined()) |
9810d34d SS |
4453 | { |
4454 | if ((x >> 26) != ((address + 4) >> (26 + shift))) | |
4455 | { | |
4456 | gold_error(_("relocation truncated to fit: %u against '%s'"), | |
4457 | r_type, gsym->name()); | |
4458 | return This::STATUS_OVERFLOW; | |
4459 | } | |
4460 | } | |
4461 | ||
4462 | val = Bits<32>::bit_select32(val, x, 0x03ffffff); | |
4463 | ||
4464 | // If required, turn JAL into JALX. | |
4465 | if (cross_mode_jump) | |
4466 | { | |
4467 | bool ok; | |
4468 | Valtype32 opcode = val >> 26; | |
4469 | Valtype32 jalx_opcode; | |
4470 | ||
4471 | // Check to see if the opcode is already JAL or JALX. | |
4472 | if (r_type == elfcpp::R_MIPS16_26) | |
4473 | { | |
4474 | ok = (opcode == 0x6) || (opcode == 0x7); | |
4475 | jalx_opcode = 0x7; | |
4476 | } | |
4477 | else if (r_type == elfcpp::R_MICROMIPS_26_S1) | |
4478 | { | |
4479 | ok = (opcode == 0x3d) || (opcode == 0x3c); | |
4480 | jalx_opcode = 0x3c; | |
4481 | } | |
4482 | else | |
4483 | { | |
4484 | ok = (opcode == 0x3) || (opcode == 0x1d); | |
4485 | jalx_opcode = 0x1d; | |
4486 | } | |
4487 | ||
4488 | // If the opcode is not JAL or JALX, there's a problem. We cannot | |
4489 | // convert J or JALS to JALX. | |
47a9f4fc | 4490 | if (!calculate_only && !ok) |
9810d34d SS |
4491 | { |
4492 | gold_error(_("Unsupported jump between ISA modes; consider " | |
4493 | "recompiling with interlinking enabled.")); | |
4494 | return This::STATUS_BAD_RELOC; | |
4495 | } | |
4496 | ||
4497 | // Make this the JALX opcode. | |
4498 | val = (val & ~(0x3f << 26)) | (jalx_opcode << 26); | |
4499 | } | |
4500 | ||
4501 | // Try converting JAL to BAL, if the target is in range. | |
4502 | if (!parameters->options().relocatable() | |
4503 | && !cross_mode_jump | |
4504 | && ((jal_to_bal | |
4505 | && r_type == elfcpp::R_MIPS_26 | |
4506 | && (val >> 26) == 0x3))) // jal addr | |
4507 | { | |
4508 | Valtype32 dest = (x << 2) | (((address + 4) >> 28) << 28); | |
4509 | int offset = dest - (address + 4); | |
4510 | if (!Bits<18>::has_overflow32(offset)) | |
4511 | { | |
4512 | if (val == 0x03200008) // jr t9 | |
4513 | val = 0x10000000 | (((Valtype32)offset >> 2) & 0xffff); // b addr | |
4514 | else | |
4515 | val = 0x04110000 | (((Valtype32)offset >> 2) & 0xffff); //bal addr | |
4516 | } | |
4517 | } | |
4518 | ||
47a9f4fc VR |
4519 | if (calculate_only) |
4520 | *calculated_value = val; | |
4521 | else | |
4522 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4523 | ||
9810d34d SS |
4524 | return This::STATUS_OKAY; |
4525 | } | |
4526 | ||
4527 | // R_MIPS_PC16 | |
4528 | static inline typename This::Status | |
4529 | relpc16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4530 | const Symbol_value<size>* psymval, Mips_address address, | |
47a9f4fc VR |
4531 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
4532 | Valtype* calculated_value) | |
9810d34d | 4533 | { |
9810d34d SS |
4534 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4535 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4536 | ||
47a9f4fc VR |
4537 | Valtype addend = (extract_addend |
4538 | ? Bits<18>::sign_extend32((val & 0xffff) << 2) | |
4539 | : addend_a); | |
9810d34d | 4540 | |
47a9f4fc | 4541 | Valtype x = psymval->value(object, addend) - address; |
9810d34d | 4542 | val = Bits<16>::bit_select32(val, x >> 2, 0xffff); |
47a9f4fc VR |
4543 | |
4544 | if (calculate_only) | |
4545 | { | |
4546 | *calculated_value = x >> 2; | |
4547 | return This::STATUS_OKAY; | |
4548 | } | |
4549 | else | |
4550 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4551 | ||
4552 | return check_overflow<18>(x); | |
9810d34d SS |
4553 | } |
4554 | ||
4555 | // R_MICROMIPS_PC7_S1 | |
4556 | static inline typename This::Status | |
4557 | relmicromips_pc7_s1(unsigned char* view, | |
4558 | const Mips_relobj<size, big_endian>* object, | |
4559 | const Symbol_value<size>* psymval, Mips_address address, | |
4560 | Mips_address addend_a, bool extract_addend, | |
47a9f4fc | 4561 | bool calculate_only, Valtype* calculated_value) |
9810d34d | 4562 | { |
9810d34d SS |
4563 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4564 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4565 | ||
47a9f4fc VR |
4566 | Valtype addend = extract_addend ? Bits<8>::sign_extend32((val & 0x7f) << 1) |
4567 | : addend_a; | |
9810d34d | 4568 | |
47a9f4fc | 4569 | Valtype x = psymval->value(object, addend) - address; |
9810d34d | 4570 | val = Bits<16>::bit_select32(val, x >> 1, 0x7f); |
47a9f4fc VR |
4571 | |
4572 | if (calculate_only) | |
4573 | { | |
4574 | *calculated_value = x >> 1; | |
4575 | return This::STATUS_OKAY; | |
4576 | } | |
4577 | else | |
4578 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4579 | ||
4580 | return check_overflow<8>(x); | |
9810d34d SS |
4581 | } |
4582 | ||
4583 | // R_MICROMIPS_PC10_S1 | |
4584 | static inline typename This::Status | |
4585 | relmicromips_pc10_s1(unsigned char* view, | |
4586 | const Mips_relobj<size, big_endian>* object, | |
4587 | const Symbol_value<size>* psymval, Mips_address address, | |
4588 | Mips_address addend_a, bool extract_addend, | |
47a9f4fc | 4589 | bool calculate_only, Valtype* calculated_value) |
9810d34d | 4590 | { |
9810d34d SS |
4591 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4592 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4593 | ||
47a9f4fc VR |
4594 | Valtype addend = (extract_addend |
4595 | ? Bits<11>::sign_extend32((val & 0x3ff) << 1) | |
4596 | : addend_a); | |
9810d34d | 4597 | |
47a9f4fc | 4598 | Valtype x = psymval->value(object, addend) - address; |
9810d34d | 4599 | val = Bits<16>::bit_select32(val, x >> 1, 0x3ff); |
47a9f4fc VR |
4600 | |
4601 | if (calculate_only) | |
4602 | { | |
4603 | *calculated_value = x >> 1; | |
4604 | return This::STATUS_OKAY; | |
4605 | } | |
4606 | else | |
4607 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4608 | ||
4609 | return check_overflow<11>(x); | |
9810d34d SS |
4610 | } |
4611 | ||
4612 | // R_MICROMIPS_PC16_S1 | |
4613 | static inline typename This::Status | |
4614 | relmicromips_pc16_s1(unsigned char* view, | |
4615 | const Mips_relobj<size, big_endian>* object, | |
4616 | const Symbol_value<size>* psymval, Mips_address address, | |
4617 | Mips_address addend_a, bool extract_addend, | |
47a9f4fc | 4618 | bool calculate_only, Valtype* calculated_value) |
9810d34d | 4619 | { |
9810d34d SS |
4620 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4621 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4622 | ||
47a9f4fc VR |
4623 | Valtype addend = (extract_addend |
4624 | ? Bits<17>::sign_extend32((val & 0xffff) << 1) | |
4625 | : addend_a); | |
9810d34d | 4626 | |
47a9f4fc | 4627 | Valtype x = psymval->value(object, addend) - address; |
9810d34d | 4628 | val = Bits<16>::bit_select32(val, x >> 1, 0xffff); |
47a9f4fc VR |
4629 | |
4630 | if (calculate_only) | |
4631 | { | |
4632 | *calculated_value = x >> 1; | |
4633 | return This::STATUS_OKAY; | |
4634 | } | |
4635 | else | |
4636 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4637 | ||
4638 | return check_overflow<17>(x); | |
9810d34d SS |
4639 | } |
4640 | ||
4641 | // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16, | |
4642 | static inline typename This::Status | |
4643 | relhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4644 | const Symbol_value<size>* psymval, Mips_address addend, | |
4645 | Mips_address address, bool gp_disp, unsigned int r_type, | |
3d0064a9 | 4646 | unsigned int r_sym, bool extract_addend) |
9810d34d SS |
4647 | { |
4648 | // Record the relocation. It will be resolved when we find lo16 part. | |
4649 | hi16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval, | |
3d0064a9 CC |
4650 | addend, r_type, r_sym, extract_addend, address, |
4651 | gp_disp)); | |
9810d34d SS |
4652 | return This::STATUS_OKAY; |
4653 | } | |
4654 | ||
4655 | // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16, | |
4656 | static inline typename This::Status | |
4657 | do_relhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4658 | const Symbol_value<size>* psymval, Mips_address addend_hi, | |
4659 | Mips_address address, bool is_gp_disp, unsigned int r_type, | |
4660 | bool extract_addend, Valtype32 addend_lo, | |
47a9f4fc VR |
4661 | Target_mips<size, big_endian>* target, bool calculate_only, |
4662 | Valtype* calculated_value) | |
9810d34d | 4663 | { |
9810d34d SS |
4664 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4665 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4666 | ||
47a9f4fc | 4667 | Valtype addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo |
9810d34d SS |
4668 | : addend_hi); |
4669 | ||
4670 | Valtype32 value; | |
4671 | if (!is_gp_disp) | |
4672 | value = psymval->value(object, addend); | |
4673 | else | |
4674 | { | |
4675 | // For MIPS16 ABI code we generate this sequence | |
4676 | // 0: li $v0,%hi(_gp_disp) | |
4677 | // 4: addiupc $v1,%lo(_gp_disp) | |
4678 | // 8: sll $v0,16 | |
4679 | // 12: addu $v0,$v1 | |
4680 | // 14: move $gp,$v0 | |
4681 | // So the offsets of hi and lo relocs are the same, but the | |
4682 | // base $pc is that used by the ADDIUPC instruction at $t9 + 4. | |
4683 | // ADDIUPC clears the low two bits of the instruction address, | |
4684 | // so the base is ($t9 + 4) & ~3. | |
4685 | Valtype32 gp_disp; | |
4686 | if (r_type == elfcpp::R_MIPS16_HI16) | |
4687 | gp_disp = (target->adjusted_gp_value(object) | |
4688 | - ((address + 4) & ~0x3)); | |
4689 | // The microMIPS .cpload sequence uses the same assembly | |
4690 | // instructions as the traditional psABI version, but the | |
4691 | // incoming $t9 has the low bit set. | |
4692 | else if (r_type == elfcpp::R_MICROMIPS_HI16) | |
4693 | gp_disp = target->adjusted_gp_value(object) - address - 1; | |
4694 | else | |
4695 | gp_disp = target->adjusted_gp_value(object) - address; | |
4696 | value = gp_disp + addend; | |
4697 | } | |
47a9f4fc | 4698 | Valtype x = ((value + 0x8000) >> 16) & 0xffff; |
9810d34d | 4699 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
4700 | |
4701 | if (calculate_only) | |
4702 | { | |
4703 | *calculated_value = x; | |
4704 | return This::STATUS_OKAY; | |
4705 | } | |
4706 | else | |
4707 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4708 | ||
4709 | return (is_gp_disp ? check_overflow<16>(x) | |
4710 | : This::STATUS_OKAY); | |
9810d34d SS |
4711 | } |
4712 | ||
4713 | // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16 | |
4714 | static inline typename This::Status | |
4715 | relgot16_local(unsigned char* view, | |
4716 | const Mips_relobj<size, big_endian>* object, | |
4717 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
3d0064a9 | 4718 | bool extract_addend, unsigned int r_type, unsigned int r_sym) |
9810d34d SS |
4719 | { |
4720 | // Record the relocation. It will be resolved when we find lo16 part. | |
4721 | got16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval, | |
3d0064a9 | 4722 | addend_a, r_type, r_sym, extract_addend)); |
9810d34d SS |
4723 | return This::STATUS_OKAY; |
4724 | } | |
4725 | ||
4726 | // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16 | |
4727 | static inline typename This::Status | |
4728 | do_relgot16_local(unsigned char* view, | |
4729 | const Mips_relobj<size, big_endian>* object, | |
4730 | const Symbol_value<size>* psymval, Mips_address addend_hi, | |
47a9f4fc VR |
4731 | bool extract_addend, Valtype32 addend_lo, |
4732 | Target_mips<size, big_endian>* target, bool calculate_only, | |
4733 | Valtype* calculated_value) | |
9810d34d | 4734 | { |
9810d34d SS |
4735 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4736 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4737 | ||
47a9f4fc | 4738 | Valtype addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo |
9810d34d SS |
4739 | : addend_hi); |
4740 | ||
4741 | // Find GOT page entry. | |
4742 | Mips_address value = ((psymval->value(object, addend) + 0x8000) >> 16) | |
4743 | & 0xffff; | |
4744 | value <<= 16; | |
4745 | unsigned int got_offset = | |
4746 | target->got_section()->get_got_page_offset(value, object); | |
4747 | ||
4748 | // Resolve the relocation. | |
47a9f4fc | 4749 | Valtype x = target->got_section()->gp_offset(got_offset, object); |
9810d34d | 4750 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
4751 | |
4752 | if (calculate_only) | |
4753 | { | |
4754 | *calculated_value = x; | |
4755 | return This::STATUS_OKAY; | |
4756 | } | |
4757 | else | |
4758 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4759 | ||
4760 | return check_overflow<16>(x); | |
9810d34d SS |
4761 | } |
4762 | ||
4763 | // R_MIPS_LO16, R_MIPS16_LO16, R_MICROMIPS_LO16, R_MICROMIPS_HI0_LO16 | |
4764 | static inline typename This::Status | |
4765 | rello16(Target_mips<size, big_endian>* target, unsigned char* view, | |
4766 | const Mips_relobj<size, big_endian>* object, | |
4767 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
4768 | bool extract_addend, Mips_address address, bool is_gp_disp, | |
47a9f4fc VR |
4769 | unsigned int r_type, unsigned int r_sym, unsigned int rel_type, |
4770 | bool calculate_only, Valtype* calculated_value) | |
9810d34d | 4771 | { |
9810d34d SS |
4772 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4773 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4774 | ||
47a9f4fc VR |
4775 | Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff) |
4776 | : addend_a); | |
9810d34d | 4777 | |
47a9f4fc | 4778 | if (rel_type == elfcpp::SHT_REL) |
9810d34d | 4779 | { |
47a9f4fc VR |
4780 | typename This::Status reloc_status = This::STATUS_OKAY; |
4781 | // Resolve pending R_MIPS_HI16 relocations. | |
4782 | typename std::list<reloc_high<size, big_endian> >::iterator it = | |
4783 | hi16_relocs.begin(); | |
4784 | while (it != hi16_relocs.end()) | |
9810d34d | 4785 | { |
47a9f4fc VR |
4786 | reloc_high<size, big_endian> hi16 = *it; |
4787 | if (hi16.r_sym == r_sym | |
4788 | && is_matching_lo16_reloc(hi16.r_type, r_type)) | |
4789 | { | |
4790 | mips_reloc_unshuffle(hi16.view, hi16.r_type, false); | |
4791 | reloc_status = do_relhi16(hi16.view, hi16.object, hi16.psymval, | |
4792 | hi16.addend, hi16.address, hi16.gp_disp, | |
4793 | hi16.r_type, hi16.extract_addend, addend, | |
4794 | target, calculate_only, calculated_value); | |
4795 | mips_reloc_shuffle(hi16.view, hi16.r_type, false); | |
4796 | if (reloc_status == This::STATUS_OVERFLOW) | |
4797 | return This::STATUS_OVERFLOW; | |
4798 | it = hi16_relocs.erase(it); | |
4799 | } | |
4800 | else | |
4801 | ++it; | |
9810d34d | 4802 | } |
9810d34d | 4803 | |
47a9f4fc VR |
4804 | // Resolve pending local R_MIPS_GOT16 relocations. |
4805 | typename std::list<reloc_high<size, big_endian> >::iterator it2 = | |
4806 | got16_relocs.begin(); | |
4807 | while (it2 != got16_relocs.end()) | |
9810d34d | 4808 | { |
47a9f4fc VR |
4809 | reloc_high<size, big_endian> got16 = *it2; |
4810 | if (got16.r_sym == r_sym | |
4811 | && is_matching_lo16_reloc(got16.r_type, r_type)) | |
4812 | { | |
4813 | mips_reloc_unshuffle(got16.view, got16.r_type, false); | |
4814 | ||
4815 | reloc_status = do_relgot16_local(got16.view, got16.object, | |
4816 | got16.psymval, got16.addend, | |
4817 | got16.extract_addend, addend, target, | |
4818 | calculate_only, calculated_value); | |
4819 | ||
4820 | mips_reloc_shuffle(got16.view, got16.r_type, false); | |
4821 | if (reloc_status == This::STATUS_OVERFLOW) | |
4822 | return This::STATUS_OVERFLOW; | |
4823 | it2 = got16_relocs.erase(it2); | |
4824 | } | |
4825 | else | |
4826 | ++it2; | |
9810d34d | 4827 | } |
9810d34d SS |
4828 | } |
4829 | ||
4830 | // Resolve R_MIPS_LO16 relocation. | |
47a9f4fc | 4831 | Valtype x; |
9810d34d SS |
4832 | if (!is_gp_disp) |
4833 | x = psymval->value(object, addend); | |
4834 | else | |
4835 | { | |
4836 | // See the comment for R_MIPS16_HI16 above for the reason | |
4837 | // for this conditional. | |
4838 | Valtype32 gp_disp; | |
4839 | if (r_type == elfcpp::R_MIPS16_LO16) | |
4840 | gp_disp = target->adjusted_gp_value(object) - (address & ~0x3); | |
4841 | else if (r_type == elfcpp::R_MICROMIPS_LO16 | |
4842 | || r_type == elfcpp::R_MICROMIPS_HI0_LO16) | |
4843 | gp_disp = target->adjusted_gp_value(object) - address + 3; | |
4844 | else | |
4845 | gp_disp = target->adjusted_gp_value(object) - address + 4; | |
4846 | // The MIPS ABI requires checking the R_MIPS_LO16 relocation | |
4847 | // for overflow. Relocations against _gp_disp are normally | |
4848 | // generated from the .cpload pseudo-op. It generates code | |
4849 | // that normally looks like this: | |
4850 | ||
4851 | // lui $gp,%hi(_gp_disp) | |
4852 | // addiu $gp,$gp,%lo(_gp_disp) | |
4853 | // addu $gp,$gp,$t9 | |
4854 | ||
4855 | // Here $t9 holds the address of the function being called, | |
4856 | // as required by the MIPS ELF ABI. The R_MIPS_LO16 | |
4857 | // relocation can easily overflow in this situation, but the | |
4858 | // R_MIPS_HI16 relocation will handle the overflow. | |
4859 | // Therefore, we consider this a bug in the MIPS ABI, and do | |
4860 | // not check for overflow here. | |
4861 | x = gp_disp + addend; | |
4862 | } | |
4863 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
47a9f4fc VR |
4864 | |
4865 | if (calculate_only) | |
4866 | *calculated_value = x; | |
4867 | else | |
4868 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4869 | ||
9810d34d SS |
4870 | return This::STATUS_OKAY; |
4871 | } | |
4872 | ||
4873 | // R_MIPS_CALL16, R_MIPS16_CALL16, R_MICROMIPS_CALL16 | |
4874 | // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16 | |
4875 | // R_MIPS_TLS_GD, R_MIPS16_TLS_GD, R_MICROMIPS_TLS_GD | |
4876 | // R_MIPS_TLS_GOTTPREL, R_MIPS16_TLS_GOTTPREL, R_MICROMIPS_TLS_GOTTPREL | |
4877 | // R_MIPS_TLS_LDM, R_MIPS16_TLS_LDM, R_MICROMIPS_TLS_LDM | |
4878 | // R_MIPS_GOT_DISP, R_MICROMIPS_GOT_DISP | |
4879 | static inline typename This::Status | |
47a9f4fc VR |
4880 | relgot(unsigned char* view, int gp_offset, bool calculate_only, |
4881 | Valtype* calculated_value) | |
9810d34d | 4882 | { |
9810d34d SS |
4883 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4884 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 4885 | Valtype x = gp_offset; |
9810d34d | 4886 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
4887 | |
4888 | if (calculate_only) | |
4889 | { | |
4890 | *calculated_value = x; | |
4891 | return This::STATUS_OKAY; | |
4892 | } | |
4893 | else | |
4894 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4895 | ||
4896 | return check_overflow<16>(x); | |
4897 | } | |
4898 | ||
4899 | // R_MIPS_EH | |
4900 | static inline typename This::Status | |
4901 | releh(unsigned char* view, int gp_offset, bool calculate_only, | |
4902 | Valtype* calculated_value) | |
4903 | { | |
4904 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
4905 | Valtype x = gp_offset; | |
4906 | ||
4907 | if (calculate_only) | |
4908 | { | |
4909 | *calculated_value = x; | |
4910 | return This::STATUS_OKAY; | |
4911 | } | |
4912 | else | |
4913 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
4914 | ||
4915 | return check_overflow<32>(x); | |
9810d34d SS |
4916 | } |
4917 | ||
4918 | // R_MIPS_GOT_PAGE, R_MICROMIPS_GOT_PAGE | |
4919 | static inline typename This::Status | |
4920 | relgotpage(Target_mips<size, big_endian>* target, unsigned char* view, | |
4921 | const Mips_relobj<size, big_endian>* object, | |
4922 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc VR |
4923 | bool extract_addend, bool calculate_only, |
4924 | Valtype* calculated_value) | |
9810d34d | 4925 | { |
9810d34d SS |
4926 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4927 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
47a9f4fc | 4928 | Valtype addend = extract_addend ? val & 0xffff : addend_a; |
9810d34d SS |
4929 | |
4930 | // Find a GOT page entry that points to within 32KB of symbol + addend. | |
4931 | Mips_address value = (psymval->value(object, addend) + 0x8000) & ~0xffff; | |
4932 | unsigned int got_offset = | |
4933 | target->got_section()->get_got_page_offset(value, object); | |
4934 | ||
47a9f4fc | 4935 | Valtype x = target->got_section()->gp_offset(got_offset, object); |
9810d34d | 4936 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
4937 | |
4938 | if (calculate_only) | |
4939 | { | |
4940 | *calculated_value = x; | |
4941 | return This::STATUS_OKAY; | |
4942 | } | |
4943 | else | |
4944 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4945 | ||
4946 | return check_overflow<16>(x); | |
9810d34d SS |
4947 | } |
4948 | ||
4949 | // R_MIPS_GOT_OFST, R_MICROMIPS_GOT_OFST | |
4950 | static inline typename This::Status | |
4951 | relgotofst(Target_mips<size, big_endian>* target, unsigned char* view, | |
4952 | const Mips_relobj<size, big_endian>* object, | |
4953 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc VR |
4954 | bool extract_addend, bool local, bool calculate_only, |
4955 | Valtype* calculated_value) | |
9810d34d | 4956 | { |
9810d34d SS |
4957 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4958 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
47a9f4fc | 4959 | Valtype addend = extract_addend ? val & 0xffff : addend_a; |
9810d34d SS |
4960 | |
4961 | // For a local symbol, find a GOT page entry that points to within 32KB of | |
4962 | // symbol + addend. Relocation value is the offset of the GOT page entry's | |
4963 | // value from symbol + addend. | |
4964 | // For a global symbol, relocation value is addend. | |
47a9f4fc | 4965 | Valtype x; |
9810d34d SS |
4966 | if (local) |
4967 | { | |
4968 | // Find GOT page entry. | |
4969 | Mips_address value = ((psymval->value(object, addend) + 0x8000) | |
4970 | & ~0xffff); | |
4971 | target->got_section()->get_got_page_offset(value, object); | |
4972 | ||
4973 | x = psymval->value(object, addend) - value; | |
4974 | } | |
4975 | else | |
4976 | x = addend; | |
4977 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
47a9f4fc VR |
4978 | |
4979 | if (calculate_only) | |
4980 | { | |
4981 | *calculated_value = x; | |
4982 | return This::STATUS_OKAY; | |
4983 | } | |
4984 | else | |
4985 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4986 | ||
4987 | return check_overflow<16>(x); | |
9810d34d SS |
4988 | } |
4989 | ||
4990 | // R_MIPS_GOT_HI16, R_MIPS_CALL_HI16, | |
4991 | // R_MICROMIPS_GOT_HI16, R_MICROMIPS_CALL_HI16 | |
4992 | static inline typename This::Status | |
47a9f4fc VR |
4993 | relgot_hi16(unsigned char* view, int gp_offset, bool calculate_only, |
4994 | Valtype* calculated_value) | |
9810d34d | 4995 | { |
9810d34d SS |
4996 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4997 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 4998 | Valtype x = gp_offset; |
9810d34d SS |
4999 | x = ((x + 0x8000) >> 16) & 0xffff; |
5000 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
47a9f4fc VR |
5001 | |
5002 | if (calculate_only) | |
5003 | *calculated_value = x; | |
5004 | else | |
5005 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5006 | ||
9810d34d SS |
5007 | return This::STATUS_OKAY; |
5008 | } | |
5009 | ||
5010 | // R_MIPS_GOT_LO16, R_MIPS_CALL_LO16, | |
5011 | // R_MICROMIPS_GOT_LO16, R_MICROMIPS_CALL_LO16 | |
5012 | static inline typename This::Status | |
47a9f4fc VR |
5013 | relgot_lo16(unsigned char* view, int gp_offset, bool calculate_only, |
5014 | Valtype* calculated_value) | |
9810d34d | 5015 | { |
9810d34d SS |
5016 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5017 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5018 | Valtype x = gp_offset; |
9810d34d | 5019 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5020 | |
5021 | if (calculate_only) | |
5022 | *calculated_value = x; | |
5023 | else | |
5024 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5025 | ||
9810d34d SS |
5026 | return This::STATUS_OKAY; |
5027 | } | |
5028 | ||
5029 | // R_MIPS_GPREL16, R_MIPS16_GPREL, R_MIPS_LITERAL, R_MICROMIPS_LITERAL | |
5030 | // R_MICROMIPS_GPREL7_S2, R_MICROMIPS_GPREL16 | |
5031 | static inline typename This::Status | |
5032 | relgprel(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5033 | const Symbol_value<size>* psymval, Mips_address gp, | |
5034 | Mips_address addend_a, bool extract_addend, bool local, | |
47a9f4fc VR |
5035 | unsigned int r_type, bool calculate_only, |
5036 | Valtype* calculated_value) | |
9810d34d | 5037 | { |
9810d34d SS |
5038 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5039 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
5040 | ||
47a9f4fc | 5041 | Valtype addend; |
9810d34d SS |
5042 | if (extract_addend) |
5043 | { | |
5044 | if (r_type == elfcpp::R_MICROMIPS_GPREL7_S2) | |
5045 | addend = (val & 0x7f) << 2; | |
5046 | else | |
5047 | addend = val & 0xffff; | |
5048 | // Only sign-extend the addend if it was extracted from the | |
5049 | // instruction. If the addend was separate, leave it alone, | |
5050 | // otherwise we may lose significant bits. | |
5051 | addend = Bits<16>::sign_extend32(addend); | |
5052 | } | |
5053 | else | |
5054 | addend = addend_a; | |
5055 | ||
47a9f4fc | 5056 | Valtype x = psymval->value(object, addend) - gp; |
9810d34d SS |
5057 | |
5058 | // If the symbol was local, any earlier relocatable links will | |
5059 | // have adjusted its addend with the gp offset, so compensate | |
5060 | // for that now. Don't do it for symbols forced local in this | |
5061 | // link, though, since they won't have had the gp offset applied | |
5062 | // to them before. | |
5063 | if (local) | |
5064 | x += object->gp_value(); | |
5065 | ||
5066 | if (r_type == elfcpp::R_MICROMIPS_GPREL7_S2) | |
5067 | val = Bits<32>::bit_select32(val, x, 0x7f); | |
5068 | else | |
5069 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
47a9f4fc VR |
5070 | |
5071 | if (calculate_only) | |
5072 | { | |
5073 | *calculated_value = x; | |
5074 | return This::STATUS_OKAY; | |
5075 | } | |
5076 | else | |
5077 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5078 | ||
5079 | if (check_overflow<16>(x) == This::STATUS_OVERFLOW) | |
9810d34d SS |
5080 | { |
5081 | gold_error(_("small-data section exceeds 64KB; lower small-data size " | |
5082 | "limit (see option -G)")); | |
5083 | return This::STATUS_OVERFLOW; | |
5084 | } | |
5085 | return This::STATUS_OKAY; | |
5086 | } | |
5087 | ||
5088 | // R_MIPS_GPREL32 | |
5089 | static inline typename This::Status | |
5090 | relgprel32(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5091 | const Symbol_value<size>* psymval, Mips_address gp, | |
47a9f4fc VR |
5092 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
5093 | Valtype* calculated_value) | |
9810d34d | 5094 | { |
9810d34d SS |
5095 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5096 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5097 | Valtype addend = extract_addend ? val : addend_a; |
9810d34d SS |
5098 | |
5099 | // R_MIPS_GPREL32 relocations are defined for local symbols only. | |
47a9f4fc VR |
5100 | Valtype x = psymval->value(object, addend) + object->gp_value() - gp; |
5101 | ||
5102 | if (calculate_only) | |
5103 | *calculated_value = x; | |
5104 | else | |
5105 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
5106 | ||
9810d34d SS |
5107 | return This::STATUS_OKAY; |
5108 | } | |
5109 | ||
5110 | // R_MIPS_TLS_TPREL_HI16, R_MIPS16_TLS_TPREL_HI16, R_MICROMIPS_TLS_TPREL_HI16 | |
5111 | // R_MIPS_TLS_DTPREL_HI16, R_MIPS16_TLS_DTPREL_HI16, | |
5112 | // R_MICROMIPS_TLS_DTPREL_HI16 | |
5113 | static inline typename This::Status | |
5114 | tlsrelhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5115 | const Symbol_value<size>* psymval, Valtype32 tp_offset, | |
47a9f4fc VR |
5116 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
5117 | Valtype* calculated_value) | |
9810d34d | 5118 | { |
9810d34d SS |
5119 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5120 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5121 | Valtype addend = extract_addend ? val & 0xffff : addend_a; |
9810d34d SS |
5122 | |
5123 | // tls symbol values are relative to tls_segment()->vaddr() | |
47a9f4fc | 5124 | Valtype x = ((psymval->value(object, addend) - tp_offset) + 0x8000) >> 16; |
9810d34d | 5125 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5126 | |
5127 | if (calculate_only) | |
5128 | *calculated_value = x; | |
5129 | else | |
5130 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5131 | ||
9810d34d SS |
5132 | return This::STATUS_OKAY; |
5133 | } | |
5134 | ||
5135 | // R_MIPS_TLS_TPREL_LO16, R_MIPS16_TLS_TPREL_LO16, R_MICROMIPS_TLS_TPREL_LO16, | |
5136 | // R_MIPS_TLS_DTPREL_LO16, R_MIPS16_TLS_DTPREL_LO16, | |
5137 | // R_MICROMIPS_TLS_DTPREL_LO16, | |
5138 | static inline typename This::Status | |
5139 | tlsrello16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5140 | const Symbol_value<size>* psymval, Valtype32 tp_offset, | |
47a9f4fc VR |
5141 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
5142 | Valtype* calculated_value) | |
9810d34d | 5143 | { |
9810d34d SS |
5144 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5145 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5146 | Valtype addend = extract_addend ? val & 0xffff : addend_a; |
9810d34d SS |
5147 | |
5148 | // tls symbol values are relative to tls_segment()->vaddr() | |
47a9f4fc | 5149 | Valtype x = psymval->value(object, addend) - tp_offset; |
9810d34d | 5150 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5151 | |
5152 | if (calculate_only) | |
5153 | *calculated_value = x; | |
5154 | else | |
5155 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5156 | ||
9810d34d SS |
5157 | return This::STATUS_OKAY; |
5158 | } | |
5159 | ||
5160 | // R_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL64, | |
5161 | // R_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL64 | |
5162 | static inline typename This::Status | |
5163 | tlsrel32(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5164 | const Symbol_value<size>* psymval, Valtype32 tp_offset, | |
47a9f4fc VR |
5165 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
5166 | Valtype* calculated_value) | |
9810d34d | 5167 | { |
9810d34d SS |
5168 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5169 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5170 | Valtype addend = extract_addend ? val : addend_a; |
9810d34d SS |
5171 | |
5172 | // tls symbol values are relative to tls_segment()->vaddr() | |
47a9f4fc VR |
5173 | Valtype x = psymval->value(object, addend) - tp_offset; |
5174 | ||
5175 | if (calculate_only) | |
5176 | *calculated_value = x; | |
5177 | else | |
5178 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
5179 | ||
9810d34d SS |
5180 | return This::STATUS_OKAY; |
5181 | } | |
5182 | ||
5183 | // R_MIPS_SUB, R_MICROMIPS_SUB | |
5184 | static inline typename This::Status | |
5185 | relsub(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5186 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc | 5187 | bool extract_addend, bool calculate_only, Valtype* calculated_value) |
9810d34d | 5188 | { |
47a9f4fc VR |
5189 | Valtype64* wv = reinterpret_cast<Valtype64*>(view); |
5190 | Valtype64 addend = (extract_addend | |
5191 | ? elfcpp::Swap<64, big_endian>::readval(wv) | |
5192 | : addend_a); | |
5193 | ||
5194 | Valtype64 x = psymval->value(object, -addend); | |
5195 | if (calculate_only) | |
5196 | *calculated_value = x; | |
5197 | else | |
5198 | elfcpp::Swap<64, big_endian>::writeval(wv, x); | |
9810d34d | 5199 | |
9810d34d | 5200 | return This::STATUS_OKAY; |
47a9f4fc VR |
5201 | } |
5202 | ||
5203 | // R_MIPS_64: S + A | |
5204 | static inline typename This::Status | |
5205 | rel64(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5206 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
5207 | bool extract_addend, bool calculate_only, Valtype* calculated_value, | |
5208 | bool apply_addend_only) | |
5209 | { | |
5210 | Valtype64* wv = reinterpret_cast<Valtype64*>(view); | |
5211 | Valtype64 addend = (extract_addend | |
5212 | ? elfcpp::Swap<64, big_endian>::readval(wv) | |
5213 | : addend_a); | |
5214 | ||
5215 | Valtype64 x = psymval->value(object, addend); | |
5216 | if (calculate_only) | |
5217 | *calculated_value = x; | |
5218 | else | |
5219 | { | |
5220 | if (apply_addend_only) | |
5221 | x = addend; | |
5222 | elfcpp::Swap<64, big_endian>::writeval(wv, x); | |
5223 | } | |
5224 | ||
5225 | return This::STATUS_OKAY; | |
5226 | } | |
5227 | ||
9810d34d SS |
5228 | }; |
5229 | ||
5230 | template<int size, bool big_endian> | |
5231 | typename std::list<reloc_high<size, big_endian> > | |
5232 | Mips_relocate_functions<size, big_endian>::hi16_relocs; | |
5233 | ||
5234 | template<int size, bool big_endian> | |
5235 | typename std::list<reloc_high<size, big_endian> > | |
5236 | Mips_relocate_functions<size, big_endian>::got16_relocs; | |
5237 | ||
5238 | // Mips_got_info methods. | |
5239 | ||
5240 | // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol | |
5241 | // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT. | |
5242 | ||
5243 | template<int size, bool big_endian> | |
5244 | void | |
5245 | Mips_got_info<size, big_endian>::record_local_got_symbol( | |
5246 | Mips_relobj<size, big_endian>* object, unsigned int symndx, | |
47a9f4fc VR |
5247 | Mips_address addend, unsigned int r_type, unsigned int shndx, |
5248 | bool is_section_symbol) | |
9810d34d SS |
5249 | { |
5250 | Mips_got_entry<size, big_endian>* entry = | |
5251 | new Mips_got_entry<size, big_endian>(object, symndx, addend, | |
5252 | mips_elf_reloc_tls_type(r_type), | |
47a9f4fc | 5253 | shndx, is_section_symbol); |
9810d34d SS |
5254 | this->record_got_entry(entry, object); |
5255 | } | |
5256 | ||
5257 | // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM, | |
5258 | // in OBJECT. FOR_CALL is true if the caller is only interested in | |
5259 | // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic | |
5260 | // relocation. | |
5261 | ||
5262 | template<int size, bool big_endian> | |
5263 | void | |
5264 | Mips_got_info<size, big_endian>::record_global_got_symbol( | |
5265 | Mips_symbol<size>* mips_sym, Mips_relobj<size, big_endian>* object, | |
5266 | unsigned int r_type, bool dyn_reloc, bool for_call) | |
5267 | { | |
5268 | if (!for_call) | |
5269 | mips_sym->set_got_not_only_for_calls(); | |
5270 | ||
5271 | // A global symbol in the GOT must also be in the dynamic symbol table. | |
5272 | if (!mips_sym->needs_dynsym_entry()) | |
5273 | { | |
5274 | switch (mips_sym->visibility()) | |
5275 | { | |
5276 | case elfcpp::STV_INTERNAL: | |
5277 | case elfcpp::STV_HIDDEN: | |
5278 | mips_sym->set_is_forced_local(); | |
5279 | break; | |
5280 | default: | |
5281 | mips_sym->set_needs_dynsym_entry(); | |
5282 | break; | |
5283 | } | |
5284 | } | |
5285 | ||
5286 | unsigned char tls_type = mips_elf_reloc_tls_type(r_type); | |
5287 | if (tls_type == GOT_TLS_NONE) | |
5288 | this->global_got_symbols_.insert(mips_sym); | |
5289 | ||
5290 | if (dyn_reloc) | |
5291 | { | |
5292 | if (mips_sym->global_got_area() == GGA_NONE) | |
5293 | mips_sym->set_global_got_area(GGA_RELOC_ONLY); | |
5294 | return; | |
5295 | } | |
5296 | ||
5297 | Mips_got_entry<size, big_endian>* entry = | |
15eb1beb | 5298 | new Mips_got_entry<size, big_endian>(mips_sym, tls_type); |
9810d34d SS |
5299 | |
5300 | this->record_got_entry(entry, object); | |
5301 | } | |
5302 | ||
5303 | // Add ENTRY to master GOT and to OBJECT's GOT. | |
5304 | ||
5305 | template<int size, bool big_endian> | |
5306 | void | |
5307 | Mips_got_info<size, big_endian>::record_got_entry( | |
5308 | Mips_got_entry<size, big_endian>* entry, | |
5309 | Mips_relobj<size, big_endian>* object) | |
5310 | { | |
15eb1beb | 5311 | this->got_entries_.insert(entry); |
9810d34d SS |
5312 | |
5313 | // Create the GOT entry for the OBJECT's GOT. | |
5314 | Mips_got_info<size, big_endian>* g = object->get_or_create_got_info(); | |
5315 | Mips_got_entry<size, big_endian>* entry2 = | |
5316 | new Mips_got_entry<size, big_endian>(*entry); | |
5317 | ||
15eb1beb | 5318 | g->got_entries_.insert(entry2); |
9810d34d SS |
5319 | } |
5320 | ||
5321 | // Record that OBJECT has a page relocation against symbol SYMNDX and | |
5322 | // that ADDEND is the addend for that relocation. | |
5323 | // This function creates an upper bound on the number of GOT slots | |
5324 | // required; no attempt is made to combine references to non-overridable | |
5325 | // global symbols across multiple input files. | |
5326 | ||
5327 | template<int size, bool big_endian> | |
5328 | void | |
5329 | Mips_got_info<size, big_endian>::record_got_page_entry( | |
5330 | Mips_relobj<size, big_endian>* object, unsigned int symndx, int addend) | |
5331 | { | |
5332 | struct Got_page_range **range_ptr, *range; | |
5333 | int old_pages, new_pages; | |
5334 | ||
5335 | // Find the Got_page_entry for this symbol. | |
5336 | Got_page_entry* entry = new Got_page_entry(object, symndx); | |
5337 | typename Got_page_entry_set::iterator it = | |
5338 | this->got_page_entries_.find(entry); | |
5339 | if (it != this->got_page_entries_.end()) | |
5340 | entry = *it; | |
5341 | else | |
5342 | this->got_page_entries_.insert(entry); | |
5343 | ||
5344 | // Add the same entry to the OBJECT's GOT. | |
5345 | Got_page_entry* entry2 = NULL; | |
5346 | Mips_got_info<size, big_endian>* g2 = object->get_or_create_got_info(); | |
5347 | if (g2->got_page_entries_.find(entry) == g2->got_page_entries_.end()) | |
5348 | { | |
5349 | entry2 = new Got_page_entry(*entry); | |
5350 | g2->got_page_entries_.insert(entry2); | |
5351 | } | |
5352 | ||
5353 | // Skip over ranges whose maximum extent cannot share a page entry | |
5354 | // with ADDEND. | |
5355 | range_ptr = &entry->ranges; | |
5356 | while (*range_ptr && addend > (*range_ptr)->max_addend + 0xffff) | |
5357 | range_ptr = &(*range_ptr)->next; | |
5358 | ||
5359 | // If we scanned to the end of the list, or found a range whose | |
5360 | // minimum extent cannot share a page entry with ADDEND, create | |
5361 | // a new singleton range. | |
5362 | range = *range_ptr; | |
5363 | if (!range || addend < range->min_addend - 0xffff) | |
5364 | { | |
5365 | range = new Got_page_range(); | |
5366 | range->next = *range_ptr; | |
5367 | range->min_addend = addend; | |
5368 | range->max_addend = addend; | |
5369 | ||
5370 | *range_ptr = range; | |
5371 | ++entry->num_pages; | |
5372 | if (entry2 != NULL) | |
5373 | ++entry2->num_pages; | |
5374 | ++this->page_gotno_; | |
5375 | ++g2->page_gotno_; | |
5376 | return; | |
5377 | } | |
5378 | ||
5379 | // Remember how many pages the old range contributed. | |
5380 | old_pages = range->get_max_pages(); | |
5381 | ||
5382 | // Update the ranges. | |
5383 | if (addend < range->min_addend) | |
5384 | range->min_addend = addend; | |
5385 | else if (addend > range->max_addend) | |
5386 | { | |
5387 | if (range->next && addend >= range->next->min_addend - 0xffff) | |
5388 | { | |
5389 | old_pages += range->next->get_max_pages(); | |
5390 | range->max_addend = range->next->max_addend; | |
5391 | range->next = range->next->next; | |
5392 | } | |
5393 | else | |
5394 | range->max_addend = addend; | |
5395 | } | |
5396 | ||
5397 | // Record any change in the total estimate. | |
5398 | new_pages = range->get_max_pages(); | |
5399 | if (old_pages != new_pages) | |
5400 | { | |
5401 | entry->num_pages += new_pages - old_pages; | |
5402 | if (entry2 != NULL) | |
5403 | entry2->num_pages += new_pages - old_pages; | |
5404 | this->page_gotno_ += new_pages - old_pages; | |
5405 | g2->page_gotno_ += new_pages - old_pages; | |
5406 | } | |
5407 | } | |
5408 | ||
5409 | // Create all entries that should be in the local part of the GOT. | |
5410 | ||
5411 | template<int size, bool big_endian> | |
5412 | void | |
5413 | Mips_got_info<size, big_endian>::add_local_entries( | |
5414 | Target_mips<size, big_endian>* target, Layout* layout) | |
5415 | { | |
5416 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
5417 | // First two GOT entries are reserved. The first entry will be filled at | |
5418 | // runtime. The second entry will be used by some runtime loaders. | |
5419 | got->add_constant(0); | |
5420 | got->add_constant(target->mips_elf_gnu_got1_mask()); | |
5421 | ||
5422 | for (typename Got_entry_set::iterator | |
5423 | p = this->got_entries_.begin(); | |
5424 | p != this->got_entries_.end(); | |
5425 | ++p) | |
5426 | { | |
5427 | Mips_got_entry<size, big_endian>* entry = *p; | |
5428 | if (entry->is_for_local_symbol() && !entry->is_tls_entry()) | |
5429 | { | |
5430 | got->add_local(entry->object(), entry->symndx(), | |
47a9f4fc | 5431 | GOT_TYPE_STANDARD, entry->addend()); |
9810d34d | 5432 | unsigned int got_offset = entry->object()->local_got_offset( |
47a9f4fc | 5433 | entry->symndx(), GOT_TYPE_STANDARD, entry->addend()); |
9810d34d SS |
5434 | if (got->multi_got() && this->index_ > 0 |
5435 | && parameters->options().output_is_position_independent()) | |
47a9f4fc VR |
5436 | { |
5437 | if (!entry->is_section_symbol()) | |
5438 | target->rel_dyn_section(layout)->add_local(entry->object(), | |
5439 | entry->symndx(), elfcpp::R_MIPS_REL32, got, got_offset); | |
5440 | else | |
5441 | target->rel_dyn_section(layout)->add_symbolless_local_addend( | |
5442 | entry->object(), entry->symndx(), elfcpp::R_MIPS_REL32, | |
5443 | got, got_offset); | |
5444 | } | |
9810d34d SS |
5445 | } |
5446 | } | |
5447 | ||
5448 | this->add_page_entries(target, layout); | |
5449 | ||
5450 | // Add global entries that should be in the local area. | |
5451 | for (typename Got_entry_set::iterator | |
5452 | p = this->got_entries_.begin(); | |
5453 | p != this->got_entries_.end(); | |
5454 | ++p) | |
5455 | { | |
5456 | Mips_got_entry<size, big_endian>* entry = *p; | |
5457 | if (!entry->is_for_global_symbol()) | |
5458 | continue; | |
5459 | ||
5460 | Mips_symbol<size>* mips_sym = entry->sym(); | |
5461 | if (mips_sym->global_got_area() == GGA_NONE && !entry->is_tls_entry()) | |
5462 | { | |
5463 | unsigned int got_type; | |
5464 | if (!got->multi_got()) | |
5465 | got_type = GOT_TYPE_STANDARD; | |
5466 | else | |
5467 | got_type = GOT_TYPE_STANDARD_MULTIGOT + this->index_; | |
5468 | if (got->add_global(mips_sym, got_type)) | |
5469 | { | |
5470 | mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type)); | |
5471 | if (got->multi_got() && this->index_ > 0 | |
5472 | && parameters->options().output_is_position_independent()) | |
5473 | target->rel_dyn_section(layout)->add_symbolless_global_addend( | |
5474 | mips_sym, elfcpp::R_MIPS_REL32, got, | |
5475 | mips_sym->got_offset(got_type)); | |
5476 | } | |
5477 | } | |
5478 | } | |
5479 | } | |
5480 | ||
5481 | // Create GOT page entries. | |
5482 | ||
5483 | template<int size, bool big_endian> | |
5484 | void | |
5485 | Mips_got_info<size, big_endian>::add_page_entries( | |
5486 | Target_mips<size, big_endian>* target, Layout* layout) | |
5487 | { | |
5488 | if (this->page_gotno_ == 0) | |
5489 | return; | |
5490 | ||
5491 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
5492 | this->got_page_offset_start_ = got->add_constant(0); | |
5493 | if (got->multi_got() && this->index_ > 0 | |
5494 | && parameters->options().output_is_position_independent()) | |
5495 | target->rel_dyn_section(layout)->add_absolute(elfcpp::R_MIPS_REL32, got, | |
5496 | this->got_page_offset_start_); | |
5497 | int num_entries = this->page_gotno_; | |
5498 | unsigned int prev_offset = this->got_page_offset_start_; | |
5499 | while (--num_entries > 0) | |
5500 | { | |
5501 | unsigned int next_offset = got->add_constant(0); | |
5502 | if (got->multi_got() && this->index_ > 0 | |
5503 | && parameters->options().output_is_position_independent()) | |
5504 | target->rel_dyn_section(layout)->add_absolute(elfcpp::R_MIPS_REL32, got, | |
5505 | next_offset); | |
5506 | gold_assert(next_offset == prev_offset + size/8); | |
5507 | prev_offset = next_offset; | |
5508 | } | |
5509 | this->got_page_offset_next_ = this->got_page_offset_start_; | |
5510 | } | |
5511 | ||
5512 | // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY. | |
5513 | ||
5514 | template<int size, bool big_endian> | |
5515 | void | |
5516 | Mips_got_info<size, big_endian>::add_global_entries( | |
5517 | Target_mips<size, big_endian>* target, Layout* layout, | |
5518 | unsigned int non_reloc_only_global_gotno) | |
5519 | { | |
5520 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
5521 | // Add GGA_NORMAL entries. | |
5522 | unsigned int count = 0; | |
5523 | for (typename Got_entry_set::iterator | |
5524 | p = this->got_entries_.begin(); | |
5525 | p != this->got_entries_.end(); | |
5526 | ++p) | |
5527 | { | |
5528 | Mips_got_entry<size, big_endian>* entry = *p; | |
5529 | if (!entry->is_for_global_symbol()) | |
5530 | continue; | |
5531 | ||
5532 | Mips_symbol<size>* mips_sym = entry->sym(); | |
5533 | if (mips_sym->global_got_area() != GGA_NORMAL) | |
5534 | continue; | |
5535 | ||
5536 | unsigned int got_type; | |
5537 | if (!got->multi_got()) | |
5538 | got_type = GOT_TYPE_STANDARD; | |
5539 | else | |
5540 | // In multi-GOT links, global symbol can be in both primary and | |
5541 | // secondary GOT(s). By creating custom GOT type | |
5542 | // (GOT_TYPE_STANDARD_MULTIGOT + got_index) we ensure that symbol | |
5543 | // is added to secondary GOT(s). | |
5544 | got_type = GOT_TYPE_STANDARD_MULTIGOT + this->index_; | |
5545 | if (!got->add_global(mips_sym, got_type)) | |
5546 | continue; | |
5547 | ||
5548 | mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type)); | |
5549 | if (got->multi_got() && this->index_ == 0) | |
5550 | count++; | |
5551 | if (got->multi_got() && this->index_ > 0) | |
5552 | { | |
5553 | if (parameters->options().output_is_position_independent() | |
5554 | || (!parameters->doing_static_link() | |
5555 | && mips_sym->is_from_dynobj() && !mips_sym->is_undefined())) | |
5556 | { | |
5557 | target->rel_dyn_section(layout)->add_global( | |
5558 | mips_sym, elfcpp::R_MIPS_REL32, got, | |
5559 | mips_sym->got_offset(got_type)); | |
5560 | got->add_secondary_got_reloc(mips_sym->got_offset(got_type), | |
5561 | elfcpp::R_MIPS_REL32, mips_sym); | |
5562 | } | |
5563 | } | |
5564 | } | |
5565 | ||
5566 | if (!got->multi_got() || this->index_ == 0) | |
5567 | { | |
5568 | if (got->multi_got()) | |
5569 | { | |
5570 | // We need to allocate space in the primary GOT for GGA_NORMAL entries | |
5571 | // of secondary GOTs, to ensure that GOT offsets of GGA_RELOC_ONLY | |
5572 | // entries correspond to dynamic symbol indexes. | |
5573 | while (count < non_reloc_only_global_gotno) | |
5574 | { | |
5575 | got->add_constant(0); | |
5576 | ++count; | |
5577 | } | |
5578 | } | |
5579 | ||
5580 | // Add GGA_RELOC_ONLY entries. | |
5581 | got->add_reloc_only_entries(); | |
5582 | } | |
5583 | } | |
5584 | ||
5585 | // Create global GOT entries that should be in the GGA_RELOC_ONLY area. | |
5586 | ||
5587 | template<int size, bool big_endian> | |
5588 | void | |
5589 | Mips_got_info<size, big_endian>::add_reloc_only_entries( | |
5590 | Mips_output_data_got<size, big_endian>* got) | |
5591 | { | |
15eb1beb | 5592 | for (typename Global_got_entry_set::iterator |
9810d34d SS |
5593 | p = this->global_got_symbols_.begin(); |
5594 | p != this->global_got_symbols_.end(); | |
5595 | ++p) | |
5596 | { | |
5597 | Mips_symbol<size>* mips_sym = *p; | |
5598 | if (mips_sym->global_got_area() == GGA_RELOC_ONLY) | |
5599 | { | |
5600 | unsigned int got_type; | |
5601 | if (!got->multi_got()) | |
5602 | got_type = GOT_TYPE_STANDARD; | |
5603 | else | |
5604 | got_type = GOT_TYPE_STANDARD_MULTIGOT; | |
5605 | if (got->add_global(mips_sym, got_type)) | |
5606 | mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type)); | |
5607 | } | |
5608 | } | |
5609 | } | |
5610 | ||
5611 | // Create TLS GOT entries. | |
5612 | ||
5613 | template<int size, bool big_endian> | |
5614 | void | |
5615 | Mips_got_info<size, big_endian>::add_tls_entries( | |
5616 | Target_mips<size, big_endian>* target, Layout* layout) | |
5617 | { | |
5618 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
5619 | // Add local tls entries. | |
5620 | for (typename Got_entry_set::iterator | |
5621 | p = this->got_entries_.begin(); | |
5622 | p != this->got_entries_.end(); | |
5623 | ++p) | |
5624 | { | |
5625 | Mips_got_entry<size, big_endian>* entry = *p; | |
5626 | if (!entry->is_tls_entry() || !entry->is_for_local_symbol()) | |
5627 | continue; | |
5628 | ||
5629 | if (entry->tls_type() == GOT_TLS_GD) | |
5630 | { | |
5631 | unsigned int got_type = GOT_TYPE_TLS_PAIR; | |
5632 | unsigned int r_type1 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 | |
5633 | : elfcpp::R_MIPS_TLS_DTPMOD64); | |
5634 | unsigned int r_type2 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 | |
5635 | : elfcpp::R_MIPS_TLS_DTPREL64); | |
5636 | ||
5637 | if (!parameters->doing_static_link()) | |
5638 | { | |
5639 | got->add_local_pair_with_rel(entry->object(), entry->symndx(), | |
5640 | entry->shndx(), got_type, | |
5641 | target->rel_dyn_section(layout), | |
47a9f4fc | 5642 | r_type1, entry->addend()); |
9810d34d | 5643 | unsigned int got_offset = |
47a9f4fc VR |
5644 | entry->object()->local_got_offset(entry->symndx(), got_type, |
5645 | entry->addend()); | |
9810d34d SS |
5646 | got->add_static_reloc(got_offset + size/8, r_type2, |
5647 | entry->object(), entry->symndx()); | |
5648 | } | |
5649 | else | |
5650 | { | |
5651 | // We are doing a static link. Mark it as belong to module 1, | |
5652 | // the executable. | |
5653 | unsigned int got_offset = got->add_constant(1); | |
5654 | entry->object()->set_local_got_offset(entry->symndx(), got_type, | |
47a9f4fc VR |
5655 | got_offset, |
5656 | entry->addend()); | |
9810d34d SS |
5657 | got->add_constant(0); |
5658 | got->add_static_reloc(got_offset + size/8, r_type2, | |
5659 | entry->object(), entry->symndx()); | |
5660 | } | |
5661 | } | |
5662 | else if (entry->tls_type() == GOT_TLS_IE) | |
5663 | { | |
5664 | unsigned int got_type = GOT_TYPE_TLS_OFFSET; | |
5665 | unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 | |
5666 | : elfcpp::R_MIPS_TLS_TPREL64); | |
5667 | if (!parameters->doing_static_link()) | |
5668 | got->add_local_with_rel(entry->object(), entry->symndx(), got_type, | |
47a9f4fc VR |
5669 | target->rel_dyn_section(layout), r_type, |
5670 | entry->addend()); | |
9810d34d SS |
5671 | else |
5672 | { | |
47a9f4fc VR |
5673 | got->add_local(entry->object(), entry->symndx(), got_type, |
5674 | entry->addend()); | |
9810d34d | 5675 | unsigned int got_offset = |
47a9f4fc VR |
5676 | entry->object()->local_got_offset(entry->symndx(), got_type, |
5677 | entry->addend()); | |
9810d34d SS |
5678 | got->add_static_reloc(got_offset, r_type, entry->object(), |
5679 | entry->symndx()); | |
5680 | } | |
5681 | } | |
5682 | else if (entry->tls_type() == GOT_TLS_LDM) | |
5683 | { | |
5684 | unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 | |
5685 | : elfcpp::R_MIPS_TLS_DTPMOD64); | |
5686 | unsigned int got_offset; | |
5687 | if (!parameters->doing_static_link()) | |
5688 | { | |
5689 | got_offset = got->add_constant(0); | |
5690 | target->rel_dyn_section(layout)->add_local( | |
5691 | entry->object(), 0, r_type, got, got_offset); | |
5692 | } | |
5693 | else | |
5694 | // We are doing a static link. Just mark it as belong to module 1, | |
5695 | // the executable. | |
5696 | got_offset = got->add_constant(1); | |
5697 | ||
5698 | got->add_constant(0); | |
5699 | got->set_tls_ldm_offset(got_offset, entry->object()); | |
5700 | } | |
5701 | else | |
5702 | gold_unreachable(); | |
5703 | } | |
5704 | ||
5705 | // Add global tls entries. | |
5706 | for (typename Got_entry_set::iterator | |
5707 | p = this->got_entries_.begin(); | |
5708 | p != this->got_entries_.end(); | |
5709 | ++p) | |
5710 | { | |
5711 | Mips_got_entry<size, big_endian>* entry = *p; | |
5712 | if (!entry->is_tls_entry() || !entry->is_for_global_symbol()) | |
5713 | continue; | |
5714 | ||
5715 | Mips_symbol<size>* mips_sym = entry->sym(); | |
5716 | if (entry->tls_type() == GOT_TLS_GD) | |
5717 | { | |
5718 | unsigned int got_type; | |
5719 | if (!got->multi_got()) | |
5720 | got_type = GOT_TYPE_TLS_PAIR; | |
5721 | else | |
5722 | got_type = GOT_TYPE_TLS_PAIR_MULTIGOT + this->index_; | |
5723 | unsigned int r_type1 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 | |
5724 | : elfcpp::R_MIPS_TLS_DTPMOD64); | |
5725 | unsigned int r_type2 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 | |
5726 | : elfcpp::R_MIPS_TLS_DTPREL64); | |
5727 | if (!parameters->doing_static_link()) | |
5728 | got->add_global_pair_with_rel(mips_sym, got_type, | |
5729 | target->rel_dyn_section(layout), r_type1, r_type2); | |
5730 | else | |
5731 | { | |
5732 | // Add a GOT pair for for R_MIPS_TLS_GD. The creates a pair of | |
5733 | // GOT entries. The first one is initialized to be 1, which is the | |
5734 | // module index for the main executable and the second one 0. A | |
5735 | // reloc of the type R_MIPS_TLS_DTPREL32/64 will be created for | |
5736 | // the second GOT entry and will be applied by gold. | |
5737 | unsigned int got_offset = got->add_constant(1); | |
5738 | mips_sym->set_got_offset(got_type, got_offset); | |
5739 | got->add_constant(0); | |
5740 | got->add_static_reloc(got_offset + size/8, r_type2, mips_sym); | |
5741 | } | |
5742 | } | |
5743 | else if (entry->tls_type() == GOT_TLS_IE) | |
5744 | { | |
5745 | unsigned int got_type; | |
5746 | if (!got->multi_got()) | |
5747 | got_type = GOT_TYPE_TLS_OFFSET; | |
5748 | else | |
5749 | got_type = GOT_TYPE_TLS_OFFSET_MULTIGOT + this->index_; | |
5750 | unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 | |
5751 | : elfcpp::R_MIPS_TLS_TPREL64); | |
5752 | if (!parameters->doing_static_link()) | |
5753 | got->add_global_with_rel(mips_sym, got_type, | |
5754 | target->rel_dyn_section(layout), r_type); | |
5755 | else | |
5756 | { | |
5757 | got->add_global(mips_sym, got_type); | |
5758 | unsigned int got_offset = mips_sym->got_offset(got_type); | |
5759 | got->add_static_reloc(got_offset, r_type, mips_sym); | |
5760 | } | |
5761 | } | |
5762 | else | |
5763 | gold_unreachable(); | |
5764 | } | |
5765 | } | |
5766 | ||
5767 | // Decide whether the symbol needs an entry in the global part of the primary | |
5768 | // GOT, setting global_got_area accordingly. Count the number of global | |
5769 | // symbols that are in the primary GOT only because they have dynamic | |
5770 | // relocations R_MIPS_REL32 against them (reloc_only_gotno). | |
5771 | ||
5772 | template<int size, bool big_endian> | |
5773 | void | |
5774 | Mips_got_info<size, big_endian>::count_got_symbols(Symbol_table* symtab) | |
5775 | { | |
15eb1beb | 5776 | for (typename Global_got_entry_set::iterator |
9810d34d SS |
5777 | p = this->global_got_symbols_.begin(); |
5778 | p != this->global_got_symbols_.end(); | |
5779 | ++p) | |
5780 | { | |
5781 | Mips_symbol<size>* sym = *p; | |
5782 | // Make a final decision about whether the symbol belongs in the | |
5783 | // local or global GOT. Symbols that bind locally can (and in the | |
5784 | // case of forced-local symbols, must) live in the local GOT. | |
5785 | // Those that are aren't in the dynamic symbol table must also | |
5786 | // live in the local GOT. | |
5787 | ||
5788 | if (!sym->should_add_dynsym_entry(symtab) | |
5789 | || (sym->got_only_for_calls() | |
5790 | ? symbol_calls_local(sym, sym->should_add_dynsym_entry(symtab)) | |
5791 | : symbol_references_local(sym, | |
5792 | sym->should_add_dynsym_entry(symtab)))) | |
5793 | // The symbol belongs in the local GOT. We no longer need this | |
5794 | // entry if it was only used for relocations; those relocations | |
5795 | // will be against the null or section symbol instead. | |
5796 | sym->set_global_got_area(GGA_NONE); | |
5797 | else if (sym->global_got_area() == GGA_RELOC_ONLY) | |
5798 | { | |
5799 | ++this->reloc_only_gotno_; | |
5800 | ++this->global_gotno_ ; | |
5801 | } | |
5802 | } | |
5803 | } | |
5804 | ||
5805 | // Return the offset of GOT page entry for VALUE. Initialize the entry with | |
5806 | // VALUE if it is not initialized. | |
5807 | ||
5808 | template<int size, bool big_endian> | |
5809 | unsigned int | |
5810 | Mips_got_info<size, big_endian>::get_got_page_offset(Mips_address value, | |
5811 | Mips_output_data_got<size, big_endian>* got) | |
5812 | { | |
5813 | typename Got_page_offsets::iterator it = this->got_page_offsets_.find(value); | |
5814 | if (it != this->got_page_offsets_.end()) | |
5815 | return it->second; | |
5816 | ||
5817 | gold_assert(this->got_page_offset_next_ < this->got_page_offset_start_ | |
5818 | + (size/8) * this->page_gotno_); | |
5819 | ||
5820 | unsigned int got_offset = this->got_page_offset_next_; | |
5821 | this->got_page_offsets_[value] = got_offset; | |
5822 | this->got_page_offset_next_ += size/8; | |
5823 | got->update_got_entry(got_offset, value); | |
5824 | return got_offset; | |
5825 | } | |
5826 | ||
5827 | // Remove lazy-binding stubs for global symbols in this GOT. | |
5828 | ||
5829 | template<int size, bool big_endian> | |
5830 | void | |
5831 | Mips_got_info<size, big_endian>::remove_lazy_stubs( | |
5832 | Target_mips<size, big_endian>* target) | |
5833 | { | |
5834 | for (typename Got_entry_set::iterator | |
5835 | p = this->got_entries_.begin(); | |
5836 | p != this->got_entries_.end(); | |
5837 | ++p) | |
5838 | { | |
5839 | Mips_got_entry<size, big_endian>* entry = *p; | |
5840 | if (entry->is_for_global_symbol()) | |
5841 | target->remove_lazy_stub_entry(entry->sym()); | |
5842 | } | |
5843 | } | |
5844 | ||
5845 | // Count the number of GOT entries required. | |
5846 | ||
5847 | template<int size, bool big_endian> | |
5848 | void | |
5849 | Mips_got_info<size, big_endian>::count_got_entries() | |
5850 | { | |
5851 | for (typename Got_entry_set::iterator | |
5852 | p = this->got_entries_.begin(); | |
5853 | p != this->got_entries_.end(); | |
5854 | ++p) | |
5855 | { | |
5856 | this->count_got_entry(*p); | |
5857 | } | |
5858 | } | |
5859 | ||
5860 | // Count the number of GOT entries required by ENTRY. Accumulate the result. | |
5861 | ||
5862 | template<int size, bool big_endian> | |
5863 | void | |
5864 | Mips_got_info<size, big_endian>::count_got_entry( | |
5865 | Mips_got_entry<size, big_endian>* entry) | |
5866 | { | |
5867 | if (entry->is_tls_entry()) | |
5868 | this->tls_gotno_ += mips_tls_got_entries(entry->tls_type()); | |
5869 | else if (entry->is_for_local_symbol() | |
5870 | || entry->sym()->global_got_area() == GGA_NONE) | |
5871 | ++this->local_gotno_; | |
5872 | else | |
5873 | ++this->global_gotno_; | |
5874 | } | |
5875 | ||
5876 | // Add FROM's GOT entries. | |
5877 | ||
5878 | template<int size, bool big_endian> | |
5879 | void | |
5880 | Mips_got_info<size, big_endian>::add_got_entries( | |
5881 | Mips_got_info<size, big_endian>* from) | |
5882 | { | |
5883 | for (typename Got_entry_set::iterator | |
5884 | p = from->got_entries_.begin(); | |
5885 | p != from->got_entries_.end(); | |
5886 | ++p) | |
5887 | { | |
5888 | Mips_got_entry<size, big_endian>* entry = *p; | |
5889 | if (this->got_entries_.find(entry) == this->got_entries_.end()) | |
5890 | { | |
5891 | Mips_got_entry<size, big_endian>* entry2 = | |
5892 | new Mips_got_entry<size, big_endian>(*entry); | |
5893 | this->got_entries_.insert(entry2); | |
5894 | this->count_got_entry(entry); | |
5895 | } | |
5896 | } | |
5897 | } | |
5898 | ||
5899 | // Add FROM's GOT page entries. | |
5900 | ||
5901 | template<int size, bool big_endian> | |
5902 | void | |
5903 | Mips_got_info<size, big_endian>::add_got_page_entries( | |
5904 | Mips_got_info<size, big_endian>* from) | |
5905 | { | |
5906 | for (typename Got_page_entry_set::iterator | |
5907 | p = from->got_page_entries_.begin(); | |
5908 | p != from->got_page_entries_.end(); | |
5909 | ++p) | |
5910 | { | |
5911 | Got_page_entry* entry = *p; | |
5912 | if (this->got_page_entries_.find(entry) == this->got_page_entries_.end()) | |
5913 | { | |
5914 | Got_page_entry* entry2 = new Got_page_entry(*entry); | |
5915 | this->got_page_entries_.insert(entry2); | |
5916 | this->page_gotno_ += entry->num_pages; | |
5917 | } | |
5918 | } | |
5919 | } | |
5920 | ||
5921 | // Mips_output_data_got methods. | |
5922 | ||
5923 | // Lay out the GOT. Add local, global and TLS entries. If GOT is | |
5924 | // larger than 64K, create multi-GOT. | |
5925 | ||
5926 | template<int size, bool big_endian> | |
5927 | void | |
5928 | Mips_output_data_got<size, big_endian>::lay_out_got(Layout* layout, | |
5929 | Symbol_table* symtab, const Input_objects* input_objects) | |
5930 | { | |
5931 | // Decide which symbols need to go in the global part of the GOT and | |
5932 | // count the number of reloc-only GOT symbols. | |
5933 | this->master_got_info_->count_got_symbols(symtab); | |
5934 | ||
5935 | // Count the number of GOT entries. | |
5936 | this->master_got_info_->count_got_entries(); | |
5937 | ||
5938 | unsigned int got_size = this->master_got_info_->got_size(); | |
5939 | if (got_size > Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE) | |
5940 | this->lay_out_multi_got(layout, input_objects); | |
5941 | else | |
5942 | { | |
5943 | // Record that all objects use single GOT. | |
5944 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); | |
5945 | p != input_objects->relobj_end(); | |
5946 | ++p) | |
5947 | { | |
5948 | Mips_relobj<size, big_endian>* object = | |
5949 | Mips_relobj<size, big_endian>::as_mips_relobj(*p); | |
5950 | if (object->get_got_info() != NULL) | |
5951 | object->set_got_info(this->master_got_info_); | |
5952 | } | |
5953 | ||
5954 | this->master_got_info_->add_local_entries(this->target_, layout); | |
5955 | this->master_got_info_->add_global_entries(this->target_, layout, | |
5956 | /*not used*/-1U); | |
5957 | this->master_got_info_->add_tls_entries(this->target_, layout); | |
5958 | } | |
5959 | } | |
5960 | ||
5961 | // Create multi-GOT. For every GOT, add local, global and TLS entries. | |
5962 | ||
5963 | template<int size, bool big_endian> | |
5964 | void | |
5965 | Mips_output_data_got<size, big_endian>::lay_out_multi_got(Layout* layout, | |
5966 | const Input_objects* input_objects) | |
5967 | { | |
5968 | // Try to merge the GOTs of input objects together, as long as they | |
5969 | // don't seem to exceed the maximum GOT size, choosing one of them | |
5970 | // to be the primary GOT. | |
5971 | this->merge_gots(input_objects); | |
5972 | ||
5973 | // Every symbol that is referenced in a dynamic relocation must be | |
5974 | // present in the primary GOT. | |
5975 | this->primary_got_->set_global_gotno(this->master_got_info_->global_gotno()); | |
5976 | ||
5977 | // Add GOT entries. | |
5978 | unsigned int i = 0; | |
5979 | unsigned int offset = 0; | |
5980 | Mips_got_info<size, big_endian>* g = this->primary_got_; | |
5981 | do | |
5982 | { | |
5983 | g->set_index(i); | |
5984 | g->set_offset(offset); | |
5985 | ||
5986 | g->add_local_entries(this->target_, layout); | |
5987 | if (i == 0) | |
5988 | g->add_global_entries(this->target_, layout, | |
5989 | (this->master_got_info_->global_gotno() | |
5990 | - this->master_got_info_->reloc_only_gotno())); | |
5991 | else | |
5992 | g->add_global_entries(this->target_, layout, /*not used*/-1U); | |
5993 | g->add_tls_entries(this->target_, layout); | |
5994 | ||
5995 | // Forbid global symbols in every non-primary GOT from having | |
5996 | // lazy-binding stubs. | |
5997 | if (i > 0) | |
5998 | g->remove_lazy_stubs(this->target_); | |
5999 | ||
6000 | ++i; | |
6001 | offset += g->got_size(); | |
6002 | g = g->next(); | |
6003 | } | |
6004 | while (g); | |
6005 | } | |
6006 | ||
6007 | // Attempt to merge GOTs of different input objects. Try to use as much as | |
6008 | // possible of the primary GOT, since it doesn't require explicit dynamic | |
6009 | // relocations, but don't use objects that would reference global symbols | |
6010 | // out of the addressable range. Failing the primary GOT, attempt to merge | |
6011 | // with the current GOT, or finish the current GOT and then make make the new | |
6012 | // GOT current. | |
6013 | ||
6014 | template<int size, bool big_endian> | |
6015 | void | |
6016 | Mips_output_data_got<size, big_endian>::merge_gots( | |
6017 | const Input_objects* input_objects) | |
6018 | { | |
6019 | gold_assert(this->primary_got_ == NULL); | |
6020 | Mips_got_info<size, big_endian>* current = NULL; | |
6021 | ||
6022 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); | |
6023 | p != input_objects->relobj_end(); | |
6024 | ++p) | |
6025 | { | |
6026 | Mips_relobj<size, big_endian>* object = | |
6027 | Mips_relobj<size, big_endian>::as_mips_relobj(*p); | |
6028 | ||
6029 | Mips_got_info<size, big_endian>* g = object->get_got_info(); | |
6030 | if (g == NULL) | |
6031 | continue; | |
6032 | ||
6033 | g->count_got_entries(); | |
6034 | ||
6035 | // Work out the number of page, local and TLS entries. | |
6036 | unsigned int estimate = this->master_got_info_->page_gotno(); | |
6037 | if (estimate > g->page_gotno()) | |
6038 | estimate = g->page_gotno(); | |
6039 | estimate += g->local_gotno() + g->tls_gotno(); | |
6040 | ||
6041 | // We place TLS GOT entries after both locals and globals. The globals | |
6042 | // for the primary GOT may overflow the normal GOT size limit, so be | |
6043 | // sure not to merge a GOT which requires TLS with the primary GOT in that | |
6044 | // case. This doesn't affect non-primary GOTs. | |
6045 | estimate += (g->tls_gotno() > 0 ? this->master_got_info_->global_gotno() | |
6046 | : g->global_gotno()); | |
6047 | ||
6048 | unsigned int max_count = | |
6049 | Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE / (size/8) - 2; | |
6050 | if (estimate <= max_count) | |
6051 | { | |
6052 | // If we don't have a primary GOT, use it as | |
6053 | // a starting point for the primary GOT. | |
6054 | if (!this->primary_got_) | |
6055 | { | |
6056 | this->primary_got_ = g; | |
6057 | continue; | |
6058 | } | |
6059 | ||
6060 | // Try merging with the primary GOT. | |
6061 | if (this->merge_got_with(g, object, this->primary_got_)) | |
6062 | continue; | |
6063 | } | |
6064 | ||
6065 | // If we can merge with the last-created GOT, do it. | |
6066 | if (current && this->merge_got_with(g, object, current)) | |
6067 | continue; | |
6068 | ||
6069 | // Well, we couldn't merge, so create a new GOT. Don't check if it | |
6070 | // fits; if it turns out that it doesn't, we'll get relocation | |
6071 | // overflows anyway. | |
6072 | g->set_next(current); | |
6073 | current = g; | |
6074 | } | |
6075 | ||
6076 | // If we do not find any suitable primary GOT, create an empty one. | |
6077 | if (this->primary_got_ == NULL) | |
6078 | this->primary_got_ = new Mips_got_info<size, big_endian>(); | |
6079 | ||
6080 | // Link primary GOT with secondary GOTs. | |
6081 | this->primary_got_->set_next(current); | |
6082 | } | |
6083 | ||
6084 | // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if | |
6085 | // this would lead to overflow, true if they were merged successfully. | |
6086 | ||
6087 | template<int size, bool big_endian> | |
6088 | bool | |
6089 | Mips_output_data_got<size, big_endian>::merge_got_with( | |
6090 | Mips_got_info<size, big_endian>* from, | |
6091 | Mips_relobj<size, big_endian>* object, | |
6092 | Mips_got_info<size, big_endian>* to) | |
6093 | { | |
6094 | // Work out how many page entries we would need for the combined GOT. | |
6095 | unsigned int estimate = this->master_got_info_->page_gotno(); | |
6096 | if (estimate >= from->page_gotno() + to->page_gotno()) | |
6097 | estimate = from->page_gotno() + to->page_gotno(); | |
6098 | ||
6099 | // Conservatively estimate how many local and TLS entries would be needed. | |
6100 | estimate += from->local_gotno() + to->local_gotno(); | |
6101 | estimate += from->tls_gotno() + to->tls_gotno(); | |
6102 | ||
6103 | // If we're merging with the primary got, any TLS relocations will | |
6104 | // come after the full set of global entries. Otherwise estimate those | |
6105 | // conservatively as well. | |
6106 | if (to == this->primary_got_ && (from->tls_gotno() + to->tls_gotno()) > 0) | |
6107 | estimate += this->master_got_info_->global_gotno(); | |
6108 | else | |
6109 | estimate += from->global_gotno() + to->global_gotno(); | |
6110 | ||
6111 | // Bail out if the combined GOT might be too big. | |
6112 | unsigned int max_count = | |
6113 | Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE / (size/8) - 2; | |
6114 | if (estimate > max_count) | |
6115 | return false; | |
6116 | ||
6117 | // Transfer the object's GOT information from FROM to TO. | |
6118 | to->add_got_entries(from); | |
6119 | to->add_got_page_entries(from); | |
6120 | ||
6121 | // Record that OBJECT should use output GOT TO. | |
6122 | object->set_got_info(to); | |
6123 | ||
6124 | return true; | |
6125 | } | |
6126 | ||
6127 | // Write out the GOT. | |
6128 | ||
6129 | template<int size, bool big_endian> | |
6130 | void | |
6131 | Mips_output_data_got<size, big_endian>::do_write(Output_file* of) | |
6132 | { | |
a080d84d AV |
6133 | typedef Unordered_set<Mips_symbol<size>*, Mips_symbol_hash<size> > |
6134 | Mips_stubs_entry_set; | |
6135 | ||
9810d34d SS |
6136 | // Call parent to write out GOT. |
6137 | Output_data_got<size, big_endian>::do_write(of); | |
6138 | ||
6139 | const off_t offset = this->offset(); | |
6140 | const section_size_type oview_size = | |
6141 | convert_to_section_size_type(this->data_size()); | |
6142 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
6143 | ||
6144 | // Needed for fixing values of .got section. | |
6145 | this->got_view_ = oview; | |
6146 | ||
6147 | // Write lazy stub addresses. | |
a080d84d | 6148 | for (typename Mips_stubs_entry_set::iterator |
9810d34d SS |
6149 | p = this->master_got_info_->global_got_symbols().begin(); |
6150 | p != this->master_got_info_->global_got_symbols().end(); | |
6151 | ++p) | |
6152 | { | |
6153 | Mips_symbol<size>* mips_sym = *p; | |
6154 | if (mips_sym->has_lazy_stub()) | |
6155 | { | |
6156 | Valtype* wv = reinterpret_cast<Valtype*>( | |
6157 | oview + this->get_primary_got_offset(mips_sym)); | |
6158 | Valtype value = | |
6159 | this->target_->mips_stubs_section()->stub_address(mips_sym); | |
6160 | elfcpp::Swap<size, big_endian>::writeval(wv, value); | |
6161 | } | |
6162 | } | |
6163 | ||
6164 | // Add +1 to GGA_NONE nonzero MIPS16 and microMIPS entries. | |
a080d84d | 6165 | for (typename Mips_stubs_entry_set::iterator |
9810d34d SS |
6166 | p = this->master_got_info_->global_got_symbols().begin(); |
6167 | p != this->master_got_info_->global_got_symbols().end(); | |
6168 | ++p) | |
6169 | { | |
6170 | Mips_symbol<size>* mips_sym = *p; | |
6171 | if (!this->multi_got() | |
6172 | && (mips_sym->is_mips16() || mips_sym->is_micromips()) | |
6173 | && mips_sym->global_got_area() == GGA_NONE | |
6174 | && mips_sym->has_got_offset(GOT_TYPE_STANDARD)) | |
6175 | { | |
6176 | Valtype* wv = reinterpret_cast<Valtype*>( | |
6177 | oview + mips_sym->got_offset(GOT_TYPE_STANDARD)); | |
6178 | Valtype value = elfcpp::Swap<size, big_endian>::readval(wv); | |
6179 | if (value != 0) | |
6180 | { | |
6181 | value |= 1; | |
6182 | elfcpp::Swap<size, big_endian>::writeval(wv, value); | |
6183 | } | |
6184 | } | |
6185 | } | |
6186 | ||
6187 | if (!this->secondary_got_relocs_.empty()) | |
6188 | { | |
6189 | // Fixup for the secondary GOT R_MIPS_REL32 relocs. For global | |
6190 | // secondary GOT entries with non-zero initial value copy the value | |
6191 | // to the corresponding primary GOT entry, and set the secondary GOT | |
6192 | // entry to zero. | |
6193 | // TODO(sasa): This is workaround. It needs to be investigated further. | |
6194 | ||
6195 | for (size_t i = 0; i < this->secondary_got_relocs_.size(); ++i) | |
6196 | { | |
6197 | Static_reloc& reloc(this->secondary_got_relocs_[i]); | |
6198 | if (reloc.symbol_is_global()) | |
6199 | { | |
6200 | Mips_symbol<size>* gsym = reloc.symbol(); | |
6201 | gold_assert(gsym != NULL); | |
6202 | ||
6203 | unsigned got_offset = reloc.got_offset(); | |
6204 | gold_assert(got_offset < oview_size); | |
6205 | ||
6206 | // Find primary GOT entry. | |
6207 | Valtype* wv_prim = reinterpret_cast<Valtype*>( | |
6208 | oview + this->get_primary_got_offset(gsym)); | |
6209 | ||
6210 | // Find secondary GOT entry. | |
6211 | Valtype* wv_sec = reinterpret_cast<Valtype*>(oview + got_offset); | |
6212 | ||
6213 | Valtype value = elfcpp::Swap<size, big_endian>::readval(wv_sec); | |
6214 | if (value != 0) | |
6215 | { | |
6216 | elfcpp::Swap<size, big_endian>::writeval(wv_prim, value); | |
6217 | elfcpp::Swap<size, big_endian>::writeval(wv_sec, 0); | |
6218 | gsym->set_applied_secondary_got_fixup(); | |
6219 | } | |
6220 | } | |
6221 | } | |
6222 | ||
6223 | of->write_output_view(offset, oview_size, oview); | |
6224 | } | |
6225 | ||
6226 | // We are done if there is no fix up. | |
6227 | if (this->static_relocs_.empty()) | |
6228 | return; | |
6229 | ||
6230 | Output_segment* tls_segment = this->layout_->tls_segment(); | |
6231 | gold_assert(tls_segment != NULL); | |
6232 | ||
6233 | for (size_t i = 0; i < this->static_relocs_.size(); ++i) | |
6234 | { | |
6235 | Static_reloc& reloc(this->static_relocs_[i]); | |
6236 | ||
6237 | Mips_address value; | |
6238 | if (!reloc.symbol_is_global()) | |
6239 | { | |
6240 | Sized_relobj_file<size, big_endian>* object = reloc.relobj(); | |
6241 | const Symbol_value<size>* psymval = | |
6242 | object->local_symbol(reloc.index()); | |
6243 | ||
6244 | // We are doing static linking. Issue an error and skip this | |
6245 | // relocation if the symbol is undefined or in a discarded_section. | |
6246 | bool is_ordinary; | |
6247 | unsigned int shndx = psymval->input_shndx(&is_ordinary); | |
6248 | if ((shndx == elfcpp::SHN_UNDEF) | |
6249 | || (is_ordinary | |
6250 | && shndx != elfcpp::SHN_UNDEF | |
6251 | && !object->is_section_included(shndx) | |
6252 | && !this->symbol_table_->is_section_folded(object, shndx))) | |
6253 | { | |
6254 | gold_error(_("undefined or discarded local symbol %u from " | |
6255 | " object %s in GOT"), | |
6256 | reloc.index(), reloc.relobj()->name().c_str()); | |
6257 | continue; | |
6258 | } | |
6259 | ||
6260 | value = psymval->value(object, 0); | |
6261 | } | |
6262 | else | |
6263 | { | |
6264 | const Mips_symbol<size>* gsym = reloc.symbol(); | |
6265 | gold_assert(gsym != NULL); | |
6266 | ||
6267 | // We are doing static linking. Issue an error and skip this | |
6268 | // relocation if the symbol is undefined or in a discarded_section | |
6269 | // unless it is a weakly_undefined symbol. | |
6270 | if ((gsym->is_defined_in_discarded_section() || gsym->is_undefined()) | |
6271 | && !gsym->is_weak_undefined()) | |
6272 | { | |
6273 | gold_error(_("undefined or discarded symbol %s in GOT"), | |
6274 | gsym->name()); | |
6275 | continue; | |
6276 | } | |
6277 | ||
6278 | if (!gsym->is_weak_undefined()) | |
6279 | value = gsym->value(); | |
6280 | else | |
6281 | value = 0; | |
6282 | } | |
6283 | ||
6284 | unsigned got_offset = reloc.got_offset(); | |
6285 | gold_assert(got_offset < oview_size); | |
6286 | ||
6287 | Valtype* wv = reinterpret_cast<Valtype*>(oview + got_offset); | |
6288 | Valtype x; | |
6289 | ||
6290 | switch (reloc.r_type()) | |
6291 | { | |
6292 | case elfcpp::R_MIPS_TLS_DTPMOD32: | |
6293 | case elfcpp::R_MIPS_TLS_DTPMOD64: | |
6294 | x = value; | |
6295 | break; | |
6296 | case elfcpp::R_MIPS_TLS_DTPREL32: | |
6297 | case elfcpp::R_MIPS_TLS_DTPREL64: | |
6298 | x = value - elfcpp::DTP_OFFSET; | |
6299 | break; | |
6300 | case elfcpp::R_MIPS_TLS_TPREL32: | |
6301 | case elfcpp::R_MIPS_TLS_TPREL64: | |
6302 | x = value - elfcpp::TP_OFFSET; | |
6303 | break; | |
6304 | default: | |
6305 | gold_unreachable(); | |
6306 | break; | |
6307 | } | |
6308 | ||
6309 | elfcpp::Swap<size, big_endian>::writeval(wv, x); | |
6310 | } | |
6311 | ||
6312 | of->write_output_view(offset, oview_size, oview); | |
6313 | } | |
6314 | ||
6315 | // Mips_relobj methods. | |
6316 | ||
6317 | // Count the local symbols. The Mips backend needs to know if a symbol | |
6318 | // is a MIPS16 or microMIPS function or not. For global symbols, it is easy | |
6319 | // because the Symbol object keeps the ELF symbol type and st_other field. | |
6320 | // For local symbol it is harder because we cannot access this information. | |
6321 | // So we override the do_count_local_symbol in parent and scan local symbols to | |
6322 | // mark MIPS16 and microMIPS functions. This is not the most efficient way but | |
6323 | // I do not want to slow down other ports by calling a per symbol target hook | |
6324 | // inside Sized_relobj_file<size, big_endian>::do_count_local_symbols. | |
6325 | ||
6326 | template<int size, bool big_endian> | |
6327 | void | |
6328 | Mips_relobj<size, big_endian>::do_count_local_symbols( | |
6329 | Stringpool_template<char>* pool, | |
6330 | Stringpool_template<char>* dynpool) | |
6331 | { | |
6332 | // Ask parent to count the local symbols. | |
6333 | Sized_relobj_file<size, big_endian>::do_count_local_symbols(pool, dynpool); | |
6334 | const unsigned int loccount = this->local_symbol_count(); | |
6335 | if (loccount == 0) | |
6336 | return; | |
6337 | ||
6338 | // Initialize the mips16 and micromips function bit-vector. | |
6339 | this->local_symbol_is_mips16_.resize(loccount, false); | |
6340 | this->local_symbol_is_micromips_.resize(loccount, false); | |
6341 | ||
6342 | // Read the symbol table section header. | |
6343 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
6344 | elfcpp::Shdr<size, big_endian> | |
6345 | symtabshdr(this, this->elf_file()->section_header(symtab_shndx)); | |
6346 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); | |
6347 | ||
6348 | // Read the local symbols. | |
6349 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
6350 | gold_assert(loccount == symtabshdr.get_sh_info()); | |
6351 | off_t locsize = loccount * sym_size; | |
6352 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), | |
6353 | locsize, true, true); | |
6354 | ||
6355 | // Loop over the local symbols and mark any MIPS16 or microMIPS local symbols. | |
6356 | ||
6357 | // Skip the first dummy symbol. | |
6358 | psyms += sym_size; | |
6359 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
6360 | { | |
6361 | elfcpp::Sym<size, big_endian> sym(psyms); | |
6362 | unsigned char st_other = sym.get_st_other(); | |
6363 | this->local_symbol_is_mips16_[i] = elfcpp::elf_st_is_mips16(st_other); | |
6364 | this->local_symbol_is_micromips_[i] = | |
6365 | elfcpp::elf_st_is_micromips(st_other); | |
6366 | } | |
6367 | } | |
6368 | ||
6369 | // Read the symbol information. | |
6370 | ||
6371 | template<int size, bool big_endian> | |
6372 | void | |
6373 | Mips_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
6374 | { | |
6375 | // Call parent class to read symbol information. | |
f35c4853 | 6376 | this->base_read_symbols(sd); |
9810d34d SS |
6377 | |
6378 | // Read processor-specific flags in ELF file header. | |
6379 | const unsigned char* pehdr = this->get_view(elfcpp::file_header_offset, | |
6380 | elfcpp::Elf_sizes<size>::ehdr_size, | |
6381 | true, false); | |
6382 | elfcpp::Ehdr<size, big_endian> ehdr(pehdr); | |
6383 | this->processor_specific_flags_ = ehdr.get_e_flags(); | |
6384 | ||
6385 | // Get the section names. | |
6386 | const unsigned char* pnamesu = sd->section_names->data(); | |
6387 | const char* pnames = reinterpret_cast<const char*>(pnamesu); | |
6388 | ||
6389 | // Initialize the mips16 stub section bit-vectors. | |
6390 | this->section_is_mips16_fn_stub_.resize(this->shnum(), false); | |
6391 | this->section_is_mips16_call_stub_.resize(this->shnum(), false); | |
6392 | this->section_is_mips16_call_fp_stub_.resize(this->shnum(), false); | |
6393 | ||
6394 | const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
6395 | const unsigned char* pshdrs = sd->section_headers->data(); | |
6396 | const unsigned char* ps = pshdrs + shdr_size; | |
6397 | for (unsigned int i = 1; i < this->shnum(); ++i, ps += shdr_size) | |
6398 | { | |
6399 | elfcpp::Shdr<size, big_endian> shdr(ps); | |
6400 | ||
6401 | if (shdr.get_sh_type() == elfcpp::SHT_MIPS_REGINFO) | |
6402 | { | |
6403 | // Read the gp value that was used to create this object. We need the | |
6404 | // gp value while processing relocs. The .reginfo section is not used | |
6405 | // in the 64-bit MIPS ELF ABI. | |
6406 | section_offset_type section_offset = shdr.get_sh_offset(); | |
6407 | section_size_type section_size = | |
6408 | convert_to_section_size_type(shdr.get_sh_size()); | |
6409 | const unsigned char* view = | |
6410 | this->get_view(section_offset, section_size, true, false); | |
6411 | ||
6412 | this->gp_ = elfcpp::Swap<size, big_endian>::readval(view + 20); | |
6413 | ||
6414 | // Read the rest of .reginfo. | |
6415 | this->gprmask_ = elfcpp::Swap<size, big_endian>::readval(view); | |
6416 | this->cprmask1_ = elfcpp::Swap<size, big_endian>::readval(view + 4); | |
6417 | this->cprmask2_ = elfcpp::Swap<size, big_endian>::readval(view + 8); | |
6418 | this->cprmask3_ = elfcpp::Swap<size, big_endian>::readval(view + 12); | |
6419 | this->cprmask4_ = elfcpp::Swap<size, big_endian>::readval(view + 16); | |
6420 | } | |
6421 | ||
47a9f4fc VR |
6422 | // In the 64-bit ABI, .MIPS.options section holds register information. |
6423 | // A SHT_MIPS_OPTIONS section contains a series of options, each of which | |
6424 | // starts with this header: | |
6425 | // | |
6426 | // typedef struct | |
6427 | // { | |
6428 | // // Type of option. | |
6429 | // unsigned char kind[1]; | |
6430 | // // Size of option descriptor, including header. | |
6431 | // unsigned char size[1]; | |
6432 | // // Section index of affected section, or 0 for global option. | |
6433 | // unsigned char section[2]; | |
6434 | // // Information specific to this kind of option. | |
6435 | // unsigned char info[4]; | |
6436 | // }; | |
6437 | // | |
6438 | // For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and set | |
6439 | // the gp value based on what we find. We may see both SHT_MIPS_REGINFO | |
6440 | // and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case, they should agree. | |
9810d34d | 6441 | |
47a9f4fc | 6442 | if (shdr.get_sh_type() == elfcpp::SHT_MIPS_OPTIONS) |
9810d34d | 6443 | { |
47a9f4fc VR |
6444 | section_offset_type section_offset = shdr.get_sh_offset(); |
6445 | section_size_type section_size = | |
6446 | convert_to_section_size_type(shdr.get_sh_size()); | |
6447 | const unsigned char* view = | |
6448 | this->get_view(section_offset, section_size, true, false); | |
6449 | const unsigned char* end = view + section_size; | |
6450 | ||
6451 | while (view + 8 <= end) | |
6452 | { | |
6453 | unsigned char kind = elfcpp::Swap<8, big_endian>::readval(view); | |
6454 | unsigned char sz = elfcpp::Swap<8, big_endian>::readval(view + 1); | |
6455 | if (sz < 8) | |
6456 | { | |
6457 | gold_error(_("%s: Warning: bad `%s' option size %u smaller " | |
6458 | "than its header"), | |
6459 | this->name().c_str(), | |
6460 | this->mips_elf_options_section_name(), sz); | |
6461 | break; | |
6462 | } | |
6463 | ||
6464 | if (this->is_n64() && kind == elfcpp::ODK_REGINFO) | |
6465 | { | |
6466 | // In the 64 bit ABI, an ODK_REGINFO option is the following | |
6467 | // structure. The info field of the options header is not | |
6468 | // used. | |
6469 | // | |
6470 | // typedef struct | |
6471 | // { | |
6472 | // // Mask of general purpose registers used. | |
6473 | // unsigned char ri_gprmask[4]; | |
6474 | // // Padding. | |
6475 | // unsigned char ri_pad[4]; | |
6476 | // // Mask of co-processor registers used. | |
6477 | // unsigned char ri_cprmask[4][4]; | |
6478 | // // GP register value for this object file. | |
6479 | // unsigned char ri_gp_value[8]; | |
6480 | // }; | |
6481 | ||
6482 | this->gp_ = elfcpp::Swap<size, big_endian>::readval(view | |
6483 | + 32); | |
6484 | } | |
6485 | else if (kind == elfcpp::ODK_REGINFO) | |
6486 | { | |
6487 | // In the 32 bit ABI, an ODK_REGINFO option is the following | |
6488 | // structure. The info field of the options header is not | |
6489 | // used. The same structure is used in .reginfo section. | |
6490 | // | |
6491 | // typedef struct | |
6492 | // { | |
6493 | // unsigned char ri_gprmask[4]; | |
6494 | // unsigned char ri_cprmask[4][4]; | |
6495 | // unsigned char ri_gp_value[4]; | |
6496 | // }; | |
6497 | ||
6498 | this->gp_ = elfcpp::Swap<size, big_endian>::readval(view | |
6499 | + 28); | |
6500 | } | |
6501 | view += sz; | |
6502 | } | |
6503 | } | |
6504 | ||
6505 | const char* name = pnames + shdr.get_sh_name(); | |
6506 | this->section_is_mips16_fn_stub_[i] = is_prefix_of(".mips16.fn", name); | |
6507 | this->section_is_mips16_call_stub_[i] = | |
6508 | is_prefix_of(".mips16.call.", name); | |
6509 | this->section_is_mips16_call_fp_stub_[i] = | |
6510 | is_prefix_of(".mips16.call.fp.", name); | |
6511 | ||
6512 | if (strcmp(name, ".pdr") == 0) | |
6513 | { | |
6514 | gold_assert(this->pdr_shndx_ == -1U); | |
6515 | this->pdr_shndx_ = i; | |
6516 | } | |
6517 | } | |
6518 | } | |
6519 | ||
9810d34d SS |
6520 | // Discard MIPS16 stub secions that are not needed. |
6521 | ||
6522 | template<int size, bool big_endian> | |
6523 | void | |
6524 | Mips_relobj<size, big_endian>::discard_mips16_stub_sections(Symbol_table* symtab) | |
6525 | { | |
6526 | for (typename Mips16_stubs_int_map::const_iterator | |
6527 | it = this->mips16_stub_sections_.begin(); | |
6528 | it != this->mips16_stub_sections_.end(); ++it) | |
6529 | { | |
6530 | Mips16_stub_section<size, big_endian>* stub_section = it->second; | |
6531 | if (!stub_section->is_target_found()) | |
6532 | { | |
6533 | gold_error(_("no relocation found in mips16 stub section '%s'"), | |
6534 | stub_section->object() | |
6535 | ->section_name(stub_section->shndx()).c_str()); | |
6536 | } | |
6537 | ||
6538 | bool discard = false; | |
6539 | if (stub_section->is_for_local_function()) | |
6540 | { | |
6541 | if (stub_section->is_fn_stub()) | |
6542 | { | |
6543 | // This stub is for a local symbol. This stub will only | |
6544 | // be needed if there is some relocation in this object, | |
6545 | // other than a 16 bit function call, which refers to this | |
6546 | // symbol. | |
6547 | if (!this->has_local_non_16bit_call_relocs(stub_section->r_sym())) | |
6548 | discard = true; | |
6549 | else | |
6550 | this->add_local_mips16_fn_stub(stub_section); | |
6551 | } | |
6552 | else | |
6553 | { | |
6554 | // This stub is for a local symbol. This stub will only | |
6555 | // be needed if there is some relocation (R_MIPS16_26) in | |
6556 | // this object that refers to this symbol. | |
6557 | gold_assert(stub_section->is_call_stub() | |
6558 | || stub_section->is_call_fp_stub()); | |
6559 | if (!this->has_local_16bit_call_relocs(stub_section->r_sym())) | |
6560 | discard = true; | |
6561 | else | |
6562 | this->add_local_mips16_call_stub(stub_section); | |
6563 | } | |
6564 | } | |
6565 | else | |
6566 | { | |
6567 | Mips_symbol<size>* gsym = stub_section->gsym(); | |
6568 | if (stub_section->is_fn_stub()) | |
6569 | { | |
6570 | if (gsym->has_mips16_fn_stub()) | |
6571 | // We already have a stub for this function. | |
6572 | discard = true; | |
6573 | else | |
6574 | { | |
6575 | gsym->set_mips16_fn_stub(stub_section); | |
6576 | if (gsym->should_add_dynsym_entry(symtab)) | |
6577 | { | |
6578 | // If we have a MIPS16 function with a stub, the | |
6579 | // dynamic symbol must refer to the stub, since only | |
6580 | // the stub uses the standard calling conventions. | |
6581 | gsym->set_need_fn_stub(); | |
6582 | if (gsym->is_from_dynobj()) | |
6583 | gsym->set_needs_dynsym_value(); | |
6584 | } | |
6585 | } | |
6586 | if (!gsym->need_fn_stub()) | |
6587 | discard = true; | |
6588 | } | |
6589 | else if (stub_section->is_call_stub()) | |
6590 | { | |
6591 | if (gsym->is_mips16()) | |
6592 | // We don't need the call_stub; this is a 16 bit | |
6593 | // function, so calls from other 16 bit functions are | |
6594 | // OK. | |
6595 | discard = true; | |
6596 | else if (gsym->has_mips16_call_stub()) | |
6597 | // We already have a stub for this function. | |
6598 | discard = true; | |
6599 | else | |
6600 | gsym->set_mips16_call_stub(stub_section); | |
6601 | } | |
6602 | else | |
6603 | { | |
6604 | gold_assert(stub_section->is_call_fp_stub()); | |
6605 | if (gsym->is_mips16()) | |
6606 | // We don't need the call_stub; this is a 16 bit | |
6607 | // function, so calls from other 16 bit functions are | |
6608 | // OK. | |
6609 | discard = true; | |
6610 | else if (gsym->has_mips16_call_fp_stub()) | |
6611 | // We already have a stub for this function. | |
6612 | discard = true; | |
6613 | else | |
6614 | gsym->set_mips16_call_fp_stub(stub_section); | |
6615 | } | |
6616 | } | |
6617 | if (discard) | |
6618 | this->set_output_section(stub_section->shndx(), NULL); | |
6619 | } | |
6620 | } | |
6621 | ||
6622 | // Mips_output_data_la25_stub methods. | |
6623 | ||
6624 | // Template for standard LA25 stub. | |
6625 | template<int size, bool big_endian> | |
6626 | const uint32_t | |
6627 | Mips_output_data_la25_stub<size, big_endian>::la25_stub_entry[] = | |
6628 | { | |
6629 | 0x3c190000, // lui $25,%hi(func) | |
6630 | 0x08000000, // j func | |
6631 | 0x27390000, // add $25,$25,%lo(func) | |
6632 | 0x00000000 // nop | |
6633 | }; | |
6634 | ||
6635 | // Template for microMIPS LA25 stub. | |
6636 | template<int size, bool big_endian> | |
6637 | const uint32_t | |
6638 | Mips_output_data_la25_stub<size, big_endian>::la25_stub_micromips_entry[] = | |
6639 | { | |
6640 | 0x41b9, 0x0000, // lui t9,%hi(func) | |
6641 | 0xd400, 0x0000, // j func | |
6642 | 0x3339, 0x0000, // addiu t9,t9,%lo(func) | |
6643 | 0x0000, 0x0000 // nop | |
6644 | }; | |
6645 | ||
6646 | // Create la25 stub for a symbol. | |
6647 | ||
6648 | template<int size, bool big_endian> | |
6649 | void | |
6650 | Mips_output_data_la25_stub<size, big_endian>::create_la25_stub( | |
6651 | Symbol_table* symtab, Target_mips<size, big_endian>* target, | |
6652 | Mips_symbol<size>* gsym) | |
6653 | { | |
6654 | if (!gsym->has_la25_stub()) | |
6655 | { | |
6656 | gsym->set_la25_stub_offset(this->symbols_.size() * 16); | |
15eb1beb | 6657 | this->symbols_.push_back(gsym); |
9810d34d SS |
6658 | this->create_stub_symbol(gsym, symtab, target, 16); |
6659 | } | |
6660 | } | |
6661 | ||
6662 | // Create a symbol for SYM stub's value and size, to help make the disassembly | |
6663 | // easier to read. | |
6664 | ||
6665 | template<int size, bool big_endian> | |
6666 | void | |
6667 | Mips_output_data_la25_stub<size, big_endian>::create_stub_symbol( | |
6668 | Mips_symbol<size>* sym, Symbol_table* symtab, | |
6669 | Target_mips<size, big_endian>* target, uint64_t symsize) | |
6670 | { | |
6671 | std::string name(".pic."); | |
6672 | name += sym->name(); | |
6673 | ||
6674 | unsigned int offset = sym->la25_stub_offset(); | |
6675 | if (sym->is_micromips()) | |
6676 | offset |= 1; | |
6677 | ||
6678 | // Make it a local function. | |
6679 | Symbol* new_sym = symtab->define_in_output_data(name.c_str(), NULL, | |
6680 | Symbol_table::PREDEFINED, | |
6681 | target->la25_stub_section(), | |
6682 | offset, symsize, elfcpp::STT_FUNC, | |
6683 | elfcpp::STB_LOCAL, | |
6684 | elfcpp::STV_DEFAULT, 0, | |
6685 | false, false); | |
6686 | new_sym->set_is_forced_local(); | |
6687 | } | |
6688 | ||
6689 | // Write out la25 stubs. This uses the hand-coded instructions above, | |
6690 | // and adjusts them as needed. | |
6691 | ||
6692 | template<int size, bool big_endian> | |
6693 | void | |
6694 | Mips_output_data_la25_stub<size, big_endian>::do_write(Output_file* of) | |
6695 | { | |
6696 | const off_t offset = this->offset(); | |
6697 | const section_size_type oview_size = | |
6698 | convert_to_section_size_type(this->data_size()); | |
6699 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
6700 | ||
15eb1beb | 6701 | for (typename std::vector<Mips_symbol<size>*>::iterator |
9810d34d SS |
6702 | p = this->symbols_.begin(); |
6703 | p != this->symbols_.end(); | |
6704 | ++p) | |
6705 | { | |
6706 | Mips_symbol<size>* sym = *p; | |
6707 | unsigned char* pov = oview + sym->la25_stub_offset(); | |
6708 | ||
6709 | Mips_address target = sym->value(); | |
6710 | if (!sym->is_micromips()) | |
6711 | { | |
6712 | elfcpp::Swap<32, big_endian>::writeval(pov, | |
6713 | la25_stub_entry[0] | (((target + 0x8000) >> 16) & 0xffff)); | |
6714 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, | |
6715 | la25_stub_entry[1] | ((target >> 2) & 0x3ffffff)); | |
6716 | elfcpp::Swap<32, big_endian>::writeval(pov + 8, | |
6717 | la25_stub_entry[2] | (target & 0xffff)); | |
6718 | elfcpp::Swap<32, big_endian>::writeval(pov + 12, la25_stub_entry[3]); | |
6719 | } | |
6720 | else | |
6721 | { | |
6722 | target |= 1; | |
6723 | // First stub instruction. Paste high 16-bits of the target. | |
6724 | elfcpp::Swap<16, big_endian>::writeval(pov, | |
6725 | la25_stub_micromips_entry[0]); | |
6726 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, | |
6727 | ((target + 0x8000) >> 16) & 0xffff); | |
6728 | // Second stub instruction. Paste low 26-bits of the target, shifted | |
6729 | // right by 1. | |
6730 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, | |
6731 | la25_stub_micromips_entry[2] | ((target >> 17) & 0x3ff)); | |
6732 | elfcpp::Swap<16, big_endian>::writeval(pov + 6, | |
6733 | la25_stub_micromips_entry[3] | ((target >> 1) & 0xffff)); | |
6734 | // Third stub instruction. Paste low 16-bits of the target. | |
6735 | elfcpp::Swap<16, big_endian>::writeval(pov + 8, | |
6736 | la25_stub_micromips_entry[4]); | |
6737 | elfcpp::Swap<16, big_endian>::writeval(pov + 10, target & 0xffff); | |
6738 | // Fourth stub instruction. | |
6739 | elfcpp::Swap<16, big_endian>::writeval(pov + 12, | |
6740 | la25_stub_micromips_entry[6]); | |
6741 | elfcpp::Swap<16, big_endian>::writeval(pov + 14, | |
6742 | la25_stub_micromips_entry[7]); | |
6743 | } | |
6744 | } | |
6745 | ||
6746 | of->write_output_view(offset, oview_size, oview); | |
6747 | } | |
6748 | ||
6749 | // Mips_output_data_plt methods. | |
6750 | ||
6751 | // The format of the first PLT entry in an O32 executable. | |
6752 | template<int size, bool big_endian> | |
6753 | const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_o32[] = | |
6754 | { | |
6755 | 0x3c1c0000, // lui $28, %hi(&GOTPLT[0]) | |
6756 | 0x8f990000, // lw $25, %lo(&GOTPLT[0])($28) | |
6757 | 0x279c0000, // addiu $28, $28, %lo(&GOTPLT[0]) | |
6758 | 0x031cc023, // subu $24, $24, $28 | |
40fc1451 | 6759 | 0x03e07825, // or $15, $31, zero |
9810d34d SS |
6760 | 0x0018c082, // srl $24, $24, 2 |
6761 | 0x0320f809, // jalr $25 | |
6762 | 0x2718fffe // subu $24, $24, 2 | |
6763 | }; | |
6764 | ||
6765 | // The format of the first PLT entry in an N32 executable. Different | |
6766 | // because gp ($28) is not available; we use t2 ($14) instead. | |
6767 | template<int size, bool big_endian> | |
6768 | const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_n32[] = | |
6769 | { | |
6770 | 0x3c0e0000, // lui $14, %hi(&GOTPLT[0]) | |
6771 | 0x8dd90000, // lw $25, %lo(&GOTPLT[0])($14) | |
6772 | 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0]) | |
6773 | 0x030ec023, // subu $24, $24, $14 | |
40fc1451 | 6774 | 0x03e07825, // or $15, $31, zero |
9810d34d SS |
6775 | 0x0018c082, // srl $24, $24, 2 |
6776 | 0x0320f809, // jalr $25 | |
6777 | 0x2718fffe // subu $24, $24, 2 | |
6778 | }; | |
6779 | ||
6780 | // The format of the first PLT entry in an N64 executable. Different | |
6781 | // from N32 because of the increased size of GOT entries. | |
6782 | template<int size, bool big_endian> | |
6783 | const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_n64[] = | |
6784 | { | |
6785 | 0x3c0e0000, // lui $14, %hi(&GOTPLT[0]) | |
6786 | 0xddd90000, // ld $25, %lo(&GOTPLT[0])($14) | |
6787 | 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0]) | |
6788 | 0x030ec023, // subu $24, $24, $14 | |
40fc1451 | 6789 | 0x03e07825, // or $15, $31, zero |
9810d34d SS |
6790 | 0x0018c0c2, // srl $24, $24, 3 |
6791 | 0x0320f809, // jalr $25 | |
6792 | 0x2718fffe // subu $24, $24, 2 | |
6793 | }; | |
6794 | ||
6795 | // The format of the microMIPS first PLT entry in an O32 executable. | |
6796 | // We rely on v0 ($2) rather than t8 ($24) to contain the address | |
6797 | // of the GOTPLT entry handled, so this stub may only be used when | |
6798 | // all the subsequent PLT entries are microMIPS code too. | |
6799 | // | |
6800 | // The trailing NOP is for alignment and correct disassembly only. | |
6801 | template<int size, bool big_endian> | |
6802 | const uint32_t Mips_output_data_plt<size, big_endian>:: | |
6803 | plt0_entry_micromips_o32[] = | |
6804 | { | |
6805 | 0x7980, 0x0000, // addiupc $3, (&GOTPLT[0]) - . | |
6806 | 0xff23, 0x0000, // lw $25, 0($3) | |
6807 | 0x0535, // subu $2, $2, $3 | |
6808 | 0x2525, // srl $2, $2, 2 | |
6809 | 0x3302, 0xfffe, // subu $24, $2, 2 | |
6810 | 0x0dff, // move $15, $31 | |
6811 | 0x45f9, // jalrs $25 | |
6812 | 0x0f83, // move $28, $3 | |
6813 | 0x0c00 // nop | |
6814 | }; | |
6815 | ||
6816 | // The format of the microMIPS first PLT entry in an O32 executable | |
6817 | // in the insn32 mode. | |
6818 | template<int size, bool big_endian> | |
6819 | const uint32_t Mips_output_data_plt<size, big_endian>:: | |
6820 | plt0_entry_micromips32_o32[] = | |
6821 | { | |
6822 | 0x41bc, 0x0000, // lui $28, %hi(&GOTPLT[0]) | |
6823 | 0xff3c, 0x0000, // lw $25, %lo(&GOTPLT[0])($28) | |
6824 | 0x339c, 0x0000, // addiu $28, $28, %lo(&GOTPLT[0]) | |
6825 | 0x0398, 0xc1d0, // subu $24, $24, $28 | |
40fc1451 | 6826 | 0x001f, 0x7a90, // or $15, $31, zero |
9810d34d SS |
6827 | 0x0318, 0x1040, // srl $24, $24, 2 |
6828 | 0x03f9, 0x0f3c, // jalr $25 | |
6829 | 0x3318, 0xfffe // subu $24, $24, 2 | |
6830 | }; | |
6831 | ||
6832 | // The format of subsequent standard entries in the PLT. | |
6833 | template<int size, bool big_endian> | |
6834 | const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry[] = | |
6835 | { | |
6836 | 0x3c0f0000, // lui $15, %hi(.got.plt entry) | |
47a9f4fc | 6837 | 0x01f90000, // l[wd] $25, %lo(.got.plt entry)($15) |
9810d34d SS |
6838 | 0x03200008, // jr $25 |
6839 | 0x25f80000 // addiu $24, $15, %lo(.got.plt entry) | |
6840 | }; | |
6841 | ||
6842 | // The format of subsequent MIPS16 o32 PLT entries. We use v1 ($3) as a | |
6843 | // temporary because t8 ($24) and t9 ($25) are not directly addressable. | |
6844 | // Note that this differs from the GNU ld which uses both v0 ($2) and v1 ($3). | |
6845 | // We cannot use v0 because MIPS16 call stubs from the CS toolchain expect | |
6846 | // target function address in register v0. | |
6847 | template<int size, bool big_endian> | |
6848 | const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry_mips16_o32[] = | |
6849 | { | |
6850 | 0xb303, // lw $3, 12($pc) | |
6851 | 0x651b, // move $24, $3 | |
6852 | 0x9b60, // lw $3, 0($3) | |
6853 | 0xeb00, // jr $3 | |
6854 | 0x653b, // move $25, $3 | |
6855 | 0x6500, // nop | |
6856 | 0x0000, 0x0000 // .word (.got.plt entry) | |
6857 | }; | |
6858 | ||
6859 | // The format of subsequent microMIPS o32 PLT entries. We use v0 ($2) | |
6860 | // as a temporary because t8 ($24) is not addressable with ADDIUPC. | |
6861 | template<int size, bool big_endian> | |
6862 | const uint32_t Mips_output_data_plt<size, big_endian>:: | |
6863 | plt_entry_micromips_o32[] = | |
6864 | { | |
6865 | 0x7900, 0x0000, // addiupc $2, (.got.plt entry) - . | |
6866 | 0xff22, 0x0000, // lw $25, 0($2) | |
6867 | 0x4599, // jr $25 | |
6868 | 0x0f02 // move $24, $2 | |
6869 | }; | |
6870 | ||
6871 | // The format of subsequent microMIPS o32 PLT entries in the insn32 mode. | |
6872 | template<int size, bool big_endian> | |
6873 | const uint32_t Mips_output_data_plt<size, big_endian>:: | |
6874 | plt_entry_micromips32_o32[] = | |
6875 | { | |
6876 | 0x41af, 0x0000, // lui $15, %hi(.got.plt entry) | |
6877 | 0xff2f, 0x0000, // lw $25, %lo(.got.plt entry)($15) | |
6878 | 0x0019, 0x0f3c, // jr $25 | |
6879 | 0x330f, 0x0000 // addiu $24, $15, %lo(.got.plt entry) | |
6880 | }; | |
6881 | ||
6882 | // Add an entry to the PLT for a symbol referenced by r_type relocation. | |
6883 | ||
6884 | template<int size, bool big_endian> | |
6885 | void | |
6886 | Mips_output_data_plt<size, big_endian>::add_entry(Mips_symbol<size>* gsym, | |
6887 | unsigned int r_type) | |
6888 | { | |
6889 | gold_assert(!gsym->has_plt_offset()); | |
6890 | ||
6891 | // Final PLT offset for a symbol will be set in method set_plt_offsets(). | |
6892 | gsym->set_plt_offset(this->entry_count() * sizeof(plt_entry) | |
6893 | + sizeof(plt0_entry_o32)); | |
6894 | this->symbols_.push_back(gsym); | |
6895 | ||
6896 | // Record whether the relocation requires a standard MIPS | |
6897 | // or a compressed code entry. | |
6898 | if (jal_reloc(r_type)) | |
6899 | { | |
6900 | if (r_type == elfcpp::R_MIPS_26) | |
6901 | gsym->set_needs_mips_plt(true); | |
6902 | else | |
6903 | gsym->set_needs_comp_plt(true); | |
6904 | } | |
6905 | ||
6906 | section_offset_type got_offset = this->got_plt_->current_data_size(); | |
6907 | ||
6908 | // Every PLT entry needs a GOT entry which points back to the PLT | |
6909 | // entry (this will be changed by the dynamic linker, normally | |
6910 | // lazily when the function is called). | |
6911 | this->got_plt_->set_current_data_size(got_offset + size/8); | |
6912 | ||
6913 | gsym->set_needs_dynsym_entry(); | |
6914 | this->rel_->add_global(gsym, elfcpp::R_MIPS_JUMP_SLOT, this->got_plt_, | |
6915 | got_offset); | |
6916 | } | |
6917 | ||
6918 | // Set final PLT offsets. For each symbol, determine whether standard or | |
6919 | // compressed (MIPS16 or microMIPS) PLT entry is used. | |
6920 | ||
6921 | template<int size, bool big_endian> | |
6922 | void | |
6923 | Mips_output_data_plt<size, big_endian>::set_plt_offsets() | |
6924 | { | |
6925 | // The sizes of individual PLT entries. | |
6926 | unsigned int plt_mips_entry_size = this->standard_plt_entry_size(); | |
6927 | unsigned int plt_comp_entry_size = (!this->target_->is_output_newabi() | |
6928 | ? this->compressed_plt_entry_size() : 0); | |
6929 | ||
6930 | for (typename std::vector<Mips_symbol<size>*>::const_iterator | |
6931 | p = this->symbols_.begin(); p != this->symbols_.end(); ++p) | |
6932 | { | |
6933 | Mips_symbol<size>* mips_sym = *p; | |
6934 | ||
6935 | // There are no defined MIPS16 or microMIPS PLT entries for n32 or n64, | |
6936 | // so always use a standard entry there. | |
6937 | // | |
6938 | // If the symbol has a MIPS16 call stub and gets a PLT entry, then | |
6939 | // all MIPS16 calls will go via that stub, and there is no benefit | |
6940 | // to having a MIPS16 entry. And in the case of call_stub a | |
6941 | // standard entry actually has to be used as the stub ends with a J | |
6942 | // instruction. | |
6943 | if (this->target_->is_output_newabi() | |
6944 | || mips_sym->has_mips16_call_stub() | |
6945 | || mips_sym->has_mips16_call_fp_stub()) | |
6946 | { | |
6947 | mips_sym->set_needs_mips_plt(true); | |
6948 | mips_sym->set_needs_comp_plt(false); | |
6949 | } | |
6950 | ||
6951 | // Otherwise, if there are no direct calls to the function, we | |
6952 | // have a free choice of whether to use standard or compressed | |
6953 | // entries. Prefer microMIPS entries if the object is known to | |
6954 | // contain microMIPS code, so that it becomes possible to create | |
6955 | // pure microMIPS binaries. Prefer standard entries otherwise, | |
6956 | // because MIPS16 ones are no smaller and are usually slower. | |
6957 | if (!mips_sym->needs_mips_plt() && !mips_sym->needs_comp_plt()) | |
6958 | { | |
6959 | if (this->target_->is_output_micromips()) | |
6960 | mips_sym->set_needs_comp_plt(true); | |
6961 | else | |
6962 | mips_sym->set_needs_mips_plt(true); | |
6963 | } | |
6964 | ||
6965 | if (mips_sym->needs_mips_plt()) | |
6966 | { | |
6967 | mips_sym->set_mips_plt_offset(this->plt_mips_offset_); | |
6968 | this->plt_mips_offset_ += plt_mips_entry_size; | |
6969 | } | |
6970 | if (mips_sym->needs_comp_plt()) | |
6971 | { | |
6972 | mips_sym->set_comp_plt_offset(this->plt_comp_offset_); | |
6973 | this->plt_comp_offset_ += plt_comp_entry_size; | |
6974 | } | |
6975 | } | |
6976 | ||
6977 | // Figure out the size of the PLT header if we know that we are using it. | |
6978 | if (this->plt_mips_offset_ + this->plt_comp_offset_ != 0) | |
6979 | this->plt_header_size_ = this->get_plt_header_size(); | |
6980 | } | |
6981 | ||
6982 | // Write out the PLT. This uses the hand-coded instructions above, | |
6983 | // and adjusts them as needed. | |
6984 | ||
6985 | template<int size, bool big_endian> | |
6986 | void | |
6987 | Mips_output_data_plt<size, big_endian>::do_write(Output_file* of) | |
6988 | { | |
6989 | const off_t offset = this->offset(); | |
6990 | const section_size_type oview_size = | |
6991 | convert_to_section_size_type(this->data_size()); | |
6992 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
6993 | ||
6994 | const off_t gotplt_file_offset = this->got_plt_->offset(); | |
6995 | const section_size_type gotplt_size = | |
6996 | convert_to_section_size_type(this->got_plt_->data_size()); | |
6997 | unsigned char* const gotplt_view = of->get_output_view(gotplt_file_offset, | |
6998 | gotplt_size); | |
6999 | unsigned char* pov = oview; | |
7000 | ||
7001 | Mips_address plt_address = this->address(); | |
7002 | ||
7003 | // Calculate the address of .got.plt. | |
7004 | Mips_address gotplt_addr = this->got_plt_->address(); | |
7005 | Mips_address gotplt_addr_high = ((gotplt_addr + 0x8000) >> 16) & 0xffff; | |
7006 | Mips_address gotplt_addr_low = gotplt_addr & 0xffff; | |
7007 | ||
7008 | // The PLT sequence is not safe for N64 if .got.plt's address can | |
7009 | // not be loaded in two instructions. | |
7010 | gold_assert((gotplt_addr & ~(Mips_address) 0x7fffffff) == 0 | |
7011 | || ~(gotplt_addr | 0x7fffffff) == 0); | |
7012 | ||
7013 | // Write the PLT header. | |
7014 | const uint32_t* plt0_entry = this->get_plt_header_entry(); | |
7015 | if (plt0_entry == plt0_entry_micromips_o32) | |
7016 | { | |
7017 | // Write microMIPS PLT header. | |
7018 | gold_assert(gotplt_addr % 4 == 0); | |
7019 | ||
7020 | Mips_address gotpc_offset = gotplt_addr - ((plt_address | 3) ^ 3); | |
7021 | ||
7022 | // ADDIUPC has a span of +/-16MB, check we're in range. | |
7023 | if (gotpc_offset + 0x1000000 >= 0x2000000) | |
7024 | { | |
7025 | gold_error(_(".got.plt offset of %ld from .plt beyond the range of " | |
7026 | "ADDIUPC"), (long)gotpc_offset); | |
7027 | return; | |
7028 | } | |
7029 | ||
7030 | elfcpp::Swap<16, big_endian>::writeval(pov, | |
7031 | plt0_entry[0] | ((gotpc_offset >> 18) & 0x7f)); | |
7032 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, | |
7033 | (gotpc_offset >> 2) & 0xffff); | |
7034 | pov += 4; | |
7035 | for (unsigned int i = 2; | |
7036 | i < (sizeof(plt0_entry_micromips_o32) | |
7037 | / sizeof(plt0_entry_micromips_o32[0])); | |
7038 | i++) | |
7039 | { | |
7040 | elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[i]); | |
7041 | pov += 2; | |
7042 | } | |
7043 | } | |
7044 | else if (plt0_entry == plt0_entry_micromips32_o32) | |
7045 | { | |
7046 | // Write microMIPS PLT header in insn32 mode. | |
7047 | elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[0]); | |
7048 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, gotplt_addr_high); | |
7049 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, plt0_entry[2]); | |
7050 | elfcpp::Swap<16, big_endian>::writeval(pov + 6, gotplt_addr_low); | |
7051 | elfcpp::Swap<16, big_endian>::writeval(pov + 8, plt0_entry[4]); | |
7052 | elfcpp::Swap<16, big_endian>::writeval(pov + 10, gotplt_addr_low); | |
7053 | pov += 12; | |
7054 | for (unsigned int i = 6; | |
7055 | i < (sizeof(plt0_entry_micromips32_o32) | |
7056 | / sizeof(plt0_entry_micromips32_o32[0])); | |
7057 | i++) | |
7058 | { | |
7059 | elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[i]); | |
7060 | pov += 2; | |
7061 | } | |
7062 | } | |
7063 | else | |
7064 | { | |
7065 | // Write standard PLT header. | |
7066 | elfcpp::Swap<32, big_endian>::writeval(pov, | |
7067 | plt0_entry[0] | gotplt_addr_high); | |
7068 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, | |
7069 | plt0_entry[1] | gotplt_addr_low); | |
7070 | elfcpp::Swap<32, big_endian>::writeval(pov + 8, | |
7071 | plt0_entry[2] | gotplt_addr_low); | |
7072 | pov += 12; | |
7073 | for (int i = 3; i < 8; i++) | |
7074 | { | |
7075 | elfcpp::Swap<32, big_endian>::writeval(pov, plt0_entry[i]); | |
7076 | pov += 4; | |
7077 | } | |
7078 | } | |
7079 | ||
7080 | ||
7081 | unsigned char* gotplt_pov = gotplt_view; | |
7082 | unsigned int got_entry_size = size/8; // TODO(sasa): MIPS_ELF_GOT_SIZE | |
7083 | ||
7084 | // The first two entries in .got.plt are reserved. | |
7085 | elfcpp::Swap<size, big_endian>::writeval(gotplt_pov, 0); | |
7086 | elfcpp::Swap<size, big_endian>::writeval(gotplt_pov + got_entry_size, 0); | |
7087 | ||
7088 | unsigned int gotplt_offset = 2 * got_entry_size; | |
7089 | gotplt_pov += 2 * got_entry_size; | |
7090 | ||
7091 | // Calculate the address of the PLT header. | |
7092 | Mips_address header_address = (plt_address | |
7093 | + (this->is_plt_header_compressed() ? 1 : 0)); | |
7094 | ||
7095 | // Initialize compressed PLT area view. | |
7096 | unsigned char* pov2 = pov + this->plt_mips_offset_; | |
7097 | ||
7098 | // Write the PLT entries. | |
7099 | for (typename std::vector<Mips_symbol<size>*>::const_iterator | |
7100 | p = this->symbols_.begin(); | |
7101 | p != this->symbols_.end(); | |
7102 | ++p, gotplt_pov += got_entry_size, gotplt_offset += got_entry_size) | |
7103 | { | |
7104 | Mips_symbol<size>* mips_sym = *p; | |
7105 | ||
7106 | // Calculate the address of the .got.plt entry. | |
7107 | uint32_t gotplt_entry_addr = (gotplt_addr + gotplt_offset); | |
7108 | uint32_t gotplt_entry_addr_hi = (((gotplt_entry_addr + 0x8000) >> 16) | |
7109 | & 0xffff); | |
7110 | uint32_t gotplt_entry_addr_lo = gotplt_entry_addr & 0xffff; | |
7111 | ||
7112 | // Initially point the .got.plt entry at the PLT header. | |
7113 | if (this->target_->is_output_n64()) | |
7114 | elfcpp::Swap<64, big_endian>::writeval(gotplt_pov, header_address); | |
7115 | else | |
7116 | elfcpp::Swap<32, big_endian>::writeval(gotplt_pov, header_address); | |
7117 | ||
7118 | // Now handle the PLT itself. First the standard entry. | |
7119 | if (mips_sym->has_mips_plt_offset()) | |
7120 | { | |
7121 | // Pick the load opcode (LW or LD). | |
7122 | uint64_t load = this->target_->is_output_n64() ? 0xdc000000 | |
7123 | : 0x8c000000; | |
7124 | ||
7125 | // Fill in the PLT entry itself. | |
7126 | elfcpp::Swap<32, big_endian>::writeval(pov, | |
7127 | plt_entry[0] | gotplt_entry_addr_hi); | |
7128 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, | |
7129 | plt_entry[1] | gotplt_entry_addr_lo | load); | |
7130 | elfcpp::Swap<32, big_endian>::writeval(pov + 8, plt_entry[2]); | |
7131 | elfcpp::Swap<32, big_endian>::writeval(pov + 12, | |
7132 | plt_entry[3] | gotplt_entry_addr_lo); | |
7133 | pov += 16; | |
7134 | } | |
7135 | ||
7136 | // Now the compressed entry. They come after any standard ones. | |
7137 | if (mips_sym->has_comp_plt_offset()) | |
7138 | { | |
7139 | if (!this->target_->is_output_micromips()) | |
7140 | { | |
7141 | // Write MIPS16 PLT entry. | |
7142 | const uint32_t* plt_entry = plt_entry_mips16_o32; | |
7143 | ||
7144 | elfcpp::Swap<16, big_endian>::writeval(pov2, plt_entry[0]); | |
7145 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 2, plt_entry[1]); | |
7146 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]); | |
7147 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, plt_entry[3]); | |
7148 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]); | |
7149 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]); | |
7150 | elfcpp::Swap<32, big_endian>::writeval(pov2 + 12, | |
7151 | gotplt_entry_addr); | |
7152 | pov2 += 16; | |
7153 | } | |
7154 | else if (this->target_->use_32bit_micromips_instructions()) | |
7155 | { | |
7156 | // Write microMIPS PLT entry in insn32 mode. | |
7157 | const uint32_t* plt_entry = plt_entry_micromips32_o32; | |
7158 | ||
7159 | elfcpp::Swap<16, big_endian>::writeval(pov2, plt_entry[0]); | |
7160 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 2, | |
7161 | gotplt_entry_addr_hi); | |
7162 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]); | |
7163 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, | |
7164 | gotplt_entry_addr_lo); | |
7165 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]); | |
7166 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]); | |
7167 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 12, plt_entry[6]); | |
7168 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 14, | |
7169 | gotplt_entry_addr_lo); | |
7170 | pov2 += 16; | |
7171 | } | |
7172 | else | |
7173 | { | |
7174 | // Write microMIPS PLT entry. | |
7175 | const uint32_t* plt_entry = plt_entry_micromips_o32; | |
7176 | ||
7177 | gold_assert(gotplt_entry_addr % 4 == 0); | |
7178 | ||
7179 | Mips_address loc_address = plt_address + pov2 - oview; | |
7180 | int gotpc_offset = gotplt_entry_addr - ((loc_address | 3) ^ 3); | |
7181 | ||
7182 | // ADDIUPC has a span of +/-16MB, check we're in range. | |
7183 | if (gotpc_offset + 0x1000000 >= 0x2000000) | |
7184 | { | |
7185 | gold_error(_(".got.plt offset of %ld from .plt beyond the " | |
7186 | "range of ADDIUPC"), (long)gotpc_offset); | |
7187 | return; | |
7188 | } | |
7189 | ||
7190 | elfcpp::Swap<16, big_endian>::writeval(pov2, | |
7191 | plt_entry[0] | ((gotpc_offset >> 18) & 0x7f)); | |
7192 | elfcpp::Swap<16, big_endian>::writeval( | |
7193 | pov2 + 2, (gotpc_offset >> 2) & 0xffff); | |
7194 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]); | |
7195 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, plt_entry[3]); | |
7196 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]); | |
7197 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]); | |
7198 | pov2 += 12; | |
7199 | } | |
7200 | } | |
7201 | } | |
7202 | ||
7203 | // Check the number of bytes written for standard entries. | |
7204 | gold_assert(static_cast<section_size_type>( | |
7205 | pov - oview - this->plt_header_size_) == this->plt_mips_offset_); | |
7206 | // Check the number of bytes written for compressed entries. | |
7207 | gold_assert((static_cast<section_size_type>(pov2 - pov) | |
7208 | == this->plt_comp_offset_)); | |
7209 | // Check the total number of bytes written. | |
7210 | gold_assert(static_cast<section_size_type>(pov2 - oview) == oview_size); | |
7211 | ||
7212 | gold_assert(static_cast<section_size_type>(gotplt_pov - gotplt_view) | |
7213 | == gotplt_size); | |
7214 | ||
7215 | of->write_output_view(offset, oview_size, oview); | |
7216 | of->write_output_view(gotplt_file_offset, gotplt_size, gotplt_view); | |
7217 | } | |
7218 | ||
7219 | // Mips_output_data_mips_stubs methods. | |
7220 | ||
7221 | // The format of the lazy binding stub when dynamic symbol count is less than | |
7222 | // 64K, dynamic symbol index is less than 32K, and ABI is not N64. | |
7223 | template<int size, bool big_endian> | |
7224 | const uint32_t | |
7225 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_1[4] = | |
7226 | { | |
7227 | 0x8f998010, // lw t9,0x8010(gp) | |
40fc1451 | 7228 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7229 | 0x0320f809, // jalr t9,ra |
7230 | 0x24180000 // addiu t8,zero,DYN_INDEX sign extended | |
7231 | }; | |
7232 | ||
7233 | // The format of the lazy binding stub when dynamic symbol count is less than | |
7234 | // 64K, dynamic symbol index is less than 32K, and ABI is N64. | |
7235 | template<int size, bool big_endian> | |
7236 | const uint32_t | |
7237 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_1_n64[4] = | |
7238 | { | |
7239 | 0xdf998010, // ld t9,0x8010(gp) | |
40fc1451 | 7240 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7241 | 0x0320f809, // jalr t9,ra |
7242 | 0x64180000 // daddiu t8,zero,DYN_INDEX sign extended | |
7243 | }; | |
7244 | ||
7245 | // The format of the lazy binding stub when dynamic symbol count is less than | |
7246 | // 64K, dynamic symbol index is between 32K and 64K, and ABI is not N64. | |
7247 | template<int size, bool big_endian> | |
7248 | const uint32_t | |
7249 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_2[4] = | |
7250 | { | |
7251 | 0x8f998010, // lw t9,0x8010(gp) | |
40fc1451 | 7252 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7253 | 0x0320f809, // jalr t9,ra |
7254 | 0x34180000 // ori t8,zero,DYN_INDEX unsigned | |
7255 | }; | |
7256 | ||
7257 | // The format of the lazy binding stub when dynamic symbol count is less than | |
7258 | // 64K, dynamic symbol index is between 32K and 64K, and ABI is N64. | |
7259 | template<int size, bool big_endian> | |
7260 | const uint32_t | |
7261 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_2_n64[4] = | |
7262 | { | |
7263 | 0xdf998010, // ld t9,0x8010(gp) | |
40fc1451 | 7264 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7265 | 0x0320f809, // jalr t9,ra |
7266 | 0x34180000 // ori t8,zero,DYN_INDEX unsigned | |
7267 | }; | |
7268 | ||
7269 | // The format of the lazy binding stub when dynamic symbol count is greater than | |
7270 | // 64K, and ABI is not N64. | |
7271 | template<int size, bool big_endian> | |
7272 | const uint32_t Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_big[5] = | |
7273 | { | |
7274 | 0x8f998010, // lw t9,0x8010(gp) | |
40fc1451 | 7275 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7276 | 0x3c180000, // lui t8,DYN_INDEX |
7277 | 0x0320f809, // jalr t9,ra | |
7278 | 0x37180000 // ori t8,t8,DYN_INDEX | |
7279 | }; | |
7280 | ||
7281 | // The format of the lazy binding stub when dynamic symbol count is greater than | |
7282 | // 64K, and ABI is N64. | |
7283 | template<int size, bool big_endian> | |
7284 | const uint32_t | |
7285 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_big_n64[5] = | |
7286 | { | |
7287 | 0xdf998010, // ld t9,0x8010(gp) | |
40fc1451 | 7288 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7289 | 0x3c180000, // lui t8,DYN_INDEX |
7290 | 0x0320f809, // jalr t9,ra | |
7291 | 0x37180000 // ori t8,t8,DYN_INDEX | |
7292 | }; | |
7293 | ||
7294 | // microMIPS stubs. | |
7295 | ||
7296 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7297 | // less than 64K, dynamic symbol index is less than 32K, and ABI is not N64. | |
7298 | template<int size, bool big_endian> | |
7299 | const uint32_t | |
7300 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_normal_1[] = | |
7301 | { | |
7302 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
7303 | 0x0dff, // move t7,ra | |
7304 | 0x45d9, // jalr t9 | |
7305 | 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended | |
7306 | }; | |
7307 | ||
7308 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7309 | // less than 64K, dynamic symbol index is less than 32K, and ABI is N64. | |
7310 | template<int size, bool big_endian> | |
7311 | const uint32_t | |
7312 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7313 | lazy_stub_micromips_normal_1_n64[] = | |
7314 | { | |
7315 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
7316 | 0x0dff, // move t7,ra | |
7317 | 0x45d9, // jalr t9 | |
7318 | 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended | |
7319 | }; | |
7320 | ||
7321 | // The format of the microMIPS lazy binding stub when dynamic symbol | |
7322 | // count is less than 64K, dynamic symbol index is between 32K and 64K, | |
7323 | // and ABI is not N64. | |
7324 | template<int size, bool big_endian> | |
7325 | const uint32_t | |
7326 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_normal_2[] = | |
7327 | { | |
7328 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
7329 | 0x0dff, // move t7,ra | |
7330 | 0x45d9, // jalr t9 | |
7331 | 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned | |
7332 | }; | |
7333 | ||
7334 | // The format of the microMIPS lazy binding stub when dynamic symbol | |
7335 | // count is less than 64K, dynamic symbol index is between 32K and 64K, | |
7336 | // and ABI is N64. | |
7337 | template<int size, bool big_endian> | |
7338 | const uint32_t | |
7339 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7340 | lazy_stub_micromips_normal_2_n64[] = | |
7341 | { | |
7342 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
7343 | 0x0dff, // move t7,ra | |
7344 | 0x45d9, // jalr t9 | |
7345 | 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned | |
7346 | }; | |
7347 | ||
7348 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7349 | // greater than 64K, and ABI is not N64. | |
7350 | template<int size, bool big_endian> | |
7351 | const uint32_t | |
7352 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_big[] = | |
7353 | { | |
7354 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
7355 | 0x0dff, // move t7,ra | |
7356 | 0x41b8, 0x0000, // lui t8,DYN_INDEX | |
7357 | 0x45d9, // jalr t9 | |
7358 | 0x5318, 0x0000 // ori t8,t8,DYN_INDEX | |
7359 | }; | |
7360 | ||
7361 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7362 | // greater than 64K, and ABI is N64. | |
7363 | template<int size, bool big_endian> | |
7364 | const uint32_t | |
7365 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_big_n64[] = | |
7366 | { | |
7367 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
7368 | 0x0dff, // move t7,ra | |
7369 | 0x41b8, 0x0000, // lui t8,DYN_INDEX | |
7370 | 0x45d9, // jalr t9 | |
7371 | 0x5318, 0x0000 // ori t8,t8,DYN_INDEX | |
7372 | }; | |
7373 | ||
7374 | // 32-bit microMIPS stubs. | |
7375 | ||
7376 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7377 | // less than 64K, dynamic symbol index is less than 32K, ABI is not N64, and we | |
7378 | // can use only 32-bit instructions. | |
7379 | template<int size, bool big_endian> | |
7380 | const uint32_t | |
7381 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7382 | lazy_stub_micromips32_normal_1[] = | |
7383 | { | |
7384 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
40fc1451 | 7385 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7386 | 0x03f9, 0x0f3c, // jalr ra,t9 |
7387 | 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended | |
7388 | }; | |
7389 | ||
7390 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7391 | // less than 64K, dynamic symbol index is less than 32K, ABI is N64, and we can | |
7392 | // use only 32-bit instructions. | |
7393 | template<int size, bool big_endian> | |
7394 | const uint32_t | |
7395 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7396 | lazy_stub_micromips32_normal_1_n64[] = | |
7397 | { | |
7398 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
40fc1451 | 7399 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7400 | 0x03f9, 0x0f3c, // jalr ra,t9 |
7401 | 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended | |
7402 | }; | |
7403 | ||
7404 | // The format of the microMIPS lazy binding stub when dynamic symbol | |
7405 | // count is less than 64K, dynamic symbol index is between 32K and 64K, | |
7406 | // ABI is not N64, and we can use only 32-bit instructions. | |
7407 | template<int size, bool big_endian> | |
7408 | const uint32_t | |
7409 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7410 | lazy_stub_micromips32_normal_2[] = | |
7411 | { | |
7412 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
40fc1451 | 7413 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7414 | 0x03f9, 0x0f3c, // jalr ra,t9 |
7415 | 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned | |
7416 | }; | |
7417 | ||
7418 | // The format of the microMIPS lazy binding stub when dynamic symbol | |
7419 | // count is less than 64K, dynamic symbol index is between 32K and 64K, | |
7420 | // ABI is N64, and we can use only 32-bit instructions. | |
7421 | template<int size, bool big_endian> | |
7422 | const uint32_t | |
7423 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7424 | lazy_stub_micromips32_normal_2_n64[] = | |
7425 | { | |
7426 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
40fc1451 | 7427 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7428 | 0x03f9, 0x0f3c, // jalr ra,t9 |
7429 | 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned | |
7430 | }; | |
7431 | ||
7432 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7433 | // greater than 64K, ABI is not N64, and we can use only 32-bit instructions. | |
7434 | template<int size, bool big_endian> | |
7435 | const uint32_t | |
7436 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips32_big[] = | |
7437 | { | |
7438 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
40fc1451 | 7439 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7440 | 0x41b8, 0x0000, // lui t8,DYN_INDEX |
7441 | 0x03f9, 0x0f3c, // jalr ra,t9 | |
7442 | 0x5318, 0x0000 // ori t8,t8,DYN_INDEX | |
7443 | }; | |
7444 | ||
7445 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7446 | // greater than 64K, ABI is N64, and we can use only 32-bit instructions. | |
7447 | template<int size, bool big_endian> | |
7448 | const uint32_t | |
7449 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips32_big_n64[] = | |
7450 | { | |
7451 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
40fc1451 | 7452 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7453 | 0x41b8, 0x0000, // lui t8,DYN_INDEX |
7454 | 0x03f9, 0x0f3c, // jalr ra,t9 | |
7455 | 0x5318, 0x0000 // ori t8,t8,DYN_INDEX | |
7456 | }; | |
7457 | ||
7458 | // Create entry for a symbol. | |
7459 | ||
7460 | template<int size, bool big_endian> | |
7461 | void | |
7462 | Mips_output_data_mips_stubs<size, big_endian>::make_entry( | |
7463 | Mips_symbol<size>* gsym) | |
7464 | { | |
7465 | if (!gsym->has_lazy_stub() && !gsym->has_plt_offset()) | |
7466 | { | |
7467 | this->symbols_.insert(gsym); | |
7468 | gsym->set_has_lazy_stub(true); | |
7469 | } | |
7470 | } | |
7471 | ||
7472 | // Remove entry for a symbol. | |
7473 | ||
7474 | template<int size, bool big_endian> | |
7475 | void | |
7476 | Mips_output_data_mips_stubs<size, big_endian>::remove_entry( | |
7477 | Mips_symbol<size>* gsym) | |
7478 | { | |
7479 | if (gsym->has_lazy_stub()) | |
7480 | { | |
7481 | this->symbols_.erase(gsym); | |
7482 | gsym->set_has_lazy_stub(false); | |
7483 | } | |
7484 | } | |
7485 | ||
7486 | // Set stub offsets for symbols. This method expects that the number of | |
7487 | // entries in dynamic symbol table is set. | |
7488 | ||
7489 | template<int size, bool big_endian> | |
7490 | void | |
7491 | Mips_output_data_mips_stubs<size, big_endian>::set_lazy_stub_offsets() | |
7492 | { | |
7493 | gold_assert(this->dynsym_count_ != -1U); | |
7494 | ||
7495 | if (this->stub_offsets_are_set_) | |
7496 | return; | |
7497 | ||
7498 | unsigned int stub_size = this->stub_size(); | |
7499 | unsigned int offset = 0; | |
15eb1beb | 7500 | for (typename Mips_stubs_entry_set::const_iterator |
9810d34d SS |
7501 | p = this->symbols_.begin(); |
7502 | p != this->symbols_.end(); | |
7503 | ++p, offset += stub_size) | |
7504 | { | |
7505 | Mips_symbol<size>* mips_sym = *p; | |
7506 | mips_sym->set_lazy_stub_offset(offset); | |
7507 | } | |
7508 | this->stub_offsets_are_set_ = true; | |
7509 | } | |
7510 | ||
7511 | template<int size, bool big_endian> | |
7512 | void | |
7513 | Mips_output_data_mips_stubs<size, big_endian>::set_needs_dynsym_value() | |
7514 | { | |
15eb1beb | 7515 | for (typename Mips_stubs_entry_set::const_iterator |
9810d34d SS |
7516 | p = this->symbols_.begin(); p != this->symbols_.end(); ++p) |
7517 | { | |
7518 | Mips_symbol<size>* sym = *p; | |
7519 | if (sym->is_from_dynobj()) | |
7520 | sym->set_needs_dynsym_value(); | |
7521 | } | |
7522 | } | |
7523 | ||
7524 | // Write out the .MIPS.stubs. This uses the hand-coded instructions and | |
7525 | // adjusts them as needed. | |
7526 | ||
7527 | template<int size, bool big_endian> | |
7528 | void | |
7529 | Mips_output_data_mips_stubs<size, big_endian>::do_write(Output_file* of) | |
7530 | { | |
7531 | const off_t offset = this->offset(); | |
7532 | const section_size_type oview_size = | |
7533 | convert_to_section_size_type(this->data_size()); | |
7534 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
7535 | ||
7536 | bool big_stub = this->dynsym_count_ > 0x10000; | |
7537 | ||
7538 | unsigned char* pov = oview; | |
15eb1beb | 7539 | for (typename Mips_stubs_entry_set::const_iterator |
9810d34d SS |
7540 | p = this->symbols_.begin(); p != this->symbols_.end(); ++p) |
7541 | { | |
7542 | Mips_symbol<size>* sym = *p; | |
7543 | const uint32_t* lazy_stub; | |
7544 | bool n64 = this->target_->is_output_n64(); | |
7545 | ||
7546 | if (!this->target_->is_output_micromips()) | |
7547 | { | |
7548 | // Write standard (non-microMIPS) stub. | |
7549 | if (!big_stub) | |
7550 | { | |
7551 | if (sym->dynsym_index() & ~0x7fff) | |
7552 | // Dynsym index is between 32K and 64K. | |
7553 | lazy_stub = n64 ? lazy_stub_normal_2_n64 : lazy_stub_normal_2; | |
7554 | else | |
7555 | // Dynsym index is less than 32K. | |
7556 | lazy_stub = n64 ? lazy_stub_normal_1_n64 : lazy_stub_normal_1; | |
7557 | } | |
7558 | else | |
7559 | lazy_stub = n64 ? lazy_stub_big_n64 : lazy_stub_big; | |
7560 | ||
7561 | unsigned int i = 0; | |
7562 | elfcpp::Swap<32, big_endian>::writeval(pov, lazy_stub[i]); | |
7563 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, lazy_stub[i + 1]); | |
7564 | pov += 8; | |
7565 | ||
7566 | i += 2; | |
7567 | if (big_stub) | |
7568 | { | |
7569 | // LUI instruction of the big stub. Paste high 16 bits of the | |
7570 | // dynsym index. | |
7571 | elfcpp::Swap<32, big_endian>::writeval(pov, | |
7572 | lazy_stub[i] | ((sym->dynsym_index() >> 16) & 0x7fff)); | |
7573 | pov += 4; | |
7574 | i += 1; | |
7575 | } | |
7576 | elfcpp::Swap<32, big_endian>::writeval(pov, lazy_stub[i]); | |
7577 | // Last stub instruction. Paste low 16 bits of the dynsym index. | |
7578 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, | |
7579 | lazy_stub[i + 1] | (sym->dynsym_index() & 0xffff)); | |
7580 | pov += 8; | |
7581 | } | |
7582 | else if (this->target_->use_32bit_micromips_instructions()) | |
7583 | { | |
7584 | // Write microMIPS stub in insn32 mode. | |
7585 | if (!big_stub) | |
7586 | { | |
7587 | if (sym->dynsym_index() & ~0x7fff) | |
7588 | // Dynsym index is between 32K and 64K. | |
7589 | lazy_stub = n64 ? lazy_stub_micromips32_normal_2_n64 | |
7590 | : lazy_stub_micromips32_normal_2; | |
7591 | else | |
7592 | // Dynsym index is less than 32K. | |
7593 | lazy_stub = n64 ? lazy_stub_micromips32_normal_1_n64 | |
7594 | : lazy_stub_micromips32_normal_1; | |
7595 | } | |
7596 | else | |
7597 | lazy_stub = n64 ? lazy_stub_micromips32_big_n64 | |
7598 | : lazy_stub_micromips32_big; | |
7599 | ||
7600 | unsigned int i = 0; | |
7601 | // First stub instruction. We emit 32-bit microMIPS instructions by | |
7602 | // emitting two 16-bit parts because on microMIPS the 16-bit part of | |
7603 | // the instruction where the opcode is must always come first, for | |
7604 | // both little and big endian. | |
7605 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
7606 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]); | |
7607 | // Second stub instruction. | |
7608 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]); | |
7609 | elfcpp::Swap<16, big_endian>::writeval(pov + 6, lazy_stub[i + 3]); | |
7610 | pov += 8; | |
7611 | i += 4; | |
7612 | if (big_stub) | |
7613 | { | |
7614 | // LUI instruction of the big stub. Paste high 16 bits of the | |
7615 | // dynsym index. | |
7616 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
7617 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, | |
7618 | (sym->dynsym_index() >> 16) & 0x7fff); | |
7619 | pov += 4; | |
7620 | i += 2; | |
7621 | } | |
7622 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
7623 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]); | |
7624 | // Last stub instruction. Paste low 16 bits of the dynsym index. | |
7625 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]); | |
7626 | elfcpp::Swap<16, big_endian>::writeval(pov + 6, | |
7627 | sym->dynsym_index() & 0xffff); | |
7628 | pov += 8; | |
7629 | } | |
7630 | else | |
7631 | { | |
7632 | // Write microMIPS stub. | |
7633 | if (!big_stub) | |
7634 | { | |
7635 | if (sym->dynsym_index() & ~0x7fff) | |
7636 | // Dynsym index is between 32K and 64K. | |
7637 | lazy_stub = n64 ? lazy_stub_micromips_normal_2_n64 | |
7638 | : lazy_stub_micromips_normal_2; | |
7639 | else | |
7640 | // Dynsym index is less than 32K. | |
7641 | lazy_stub = n64 ? lazy_stub_micromips_normal_1_n64 | |
7642 | : lazy_stub_micromips_normal_1; | |
7643 | } | |
7644 | else | |
7645 | lazy_stub = n64 ? lazy_stub_micromips_big_n64 | |
7646 | : lazy_stub_micromips_big; | |
7647 | ||
7648 | unsigned int i = 0; | |
7649 | // First stub instruction. We emit 32-bit microMIPS instructions by | |
7650 | // emitting two 16-bit parts because on microMIPS the 16-bit part of | |
7651 | // the instruction where the opcode is must always come first, for | |
7652 | // both little and big endian. | |
7653 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
7654 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]); | |
7655 | // Second stub instruction. | |
7656 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]); | |
7657 | pov += 6; | |
7658 | i += 3; | |
7659 | if (big_stub) | |
7660 | { | |
7661 | // LUI instruction of the big stub. Paste high 16 bits of the | |
7662 | // dynsym index. | |
7663 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
7664 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, | |
7665 | (sym->dynsym_index() >> 16) & 0x7fff); | |
7666 | pov += 4; | |
7667 | i += 2; | |
7668 | } | |
7669 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
7670 | // Last stub instruction. Paste low 16 bits of the dynsym index. | |
7671 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]); | |
7672 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, | |
7673 | sym->dynsym_index() & 0xffff); | |
7674 | pov += 6; | |
7675 | } | |
7676 | } | |
7677 | ||
7678 | // We always allocate 20 bytes for every stub, because final dynsym count is | |
7679 | // not known in method do_finalize_sections. There are 4 unused bytes per | |
7680 | // stub if final dynsym count is less than 0x10000. | |
7681 | unsigned int used = pov - oview; | |
7682 | unsigned int unused = big_stub ? 0 : this->symbols_.size() * 4; | |
7683 | gold_assert(static_cast<section_size_type>(used + unused) == oview_size); | |
7684 | ||
7685 | // Fill the unused space with zeroes. | |
7686 | // TODO(sasa): Can we strip unused bytes during the relaxation? | |
7687 | if (unused > 0) | |
7688 | memset(pov, 0, unused); | |
7689 | ||
7690 | of->write_output_view(offset, oview_size, oview); | |
7691 | } | |
7692 | ||
7693 | // Mips_output_section_reginfo methods. | |
7694 | ||
7695 | template<int size, bool big_endian> | |
7696 | void | |
7697 | Mips_output_section_reginfo<size, big_endian>::do_write(Output_file* of) | |
7698 | { | |
7699 | off_t offset = this->offset(); | |
7700 | off_t data_size = this->data_size(); | |
7701 | ||
7702 | unsigned char* view = of->get_output_view(offset, data_size); | |
7703 | elfcpp::Swap<size, big_endian>::writeval(view, this->gprmask_); | |
7704 | elfcpp::Swap<size, big_endian>::writeval(view + 4, this->cprmask1_); | |
7705 | elfcpp::Swap<size, big_endian>::writeval(view + 8, this->cprmask2_); | |
7706 | elfcpp::Swap<size, big_endian>::writeval(view + 12, this->cprmask3_); | |
7707 | elfcpp::Swap<size, big_endian>::writeval(view + 16, this->cprmask4_); | |
7708 | // Write the gp value. | |
7709 | elfcpp::Swap<size, big_endian>::writeval(view + 20, | |
7710 | this->target_->gp_value()); | |
7711 | ||
7712 | of->write_output_view(offset, data_size, view); | |
7713 | } | |
7714 | ||
7715 | // Mips_copy_relocs methods. | |
7716 | ||
7717 | // Emit any saved relocs. | |
7718 | ||
7719 | template<int sh_type, int size, bool big_endian> | |
7720 | void | |
7721 | Mips_copy_relocs<sh_type, size, big_endian>::emit_mips( | |
7722 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section, | |
7723 | Symbol_table* symtab, Layout* layout, Target_mips<size, big_endian>* target) | |
7724 | { | |
7725 | for (typename Copy_relocs<sh_type, size, big_endian>:: | |
7726 | Copy_reloc_entries::iterator p = this->entries_.begin(); | |
7727 | p != this->entries_.end(); | |
7728 | ++p) | |
7729 | emit_entry(*p, reloc_section, symtab, layout, target); | |
7730 | ||
7731 | // We no longer need the saved information. | |
7732 | this->entries_.clear(); | |
7733 | } | |
7734 | ||
7735 | // Emit the reloc if appropriate. | |
7736 | ||
7737 | template<int sh_type, int size, bool big_endian> | |
7738 | void | |
7739 | Mips_copy_relocs<sh_type, size, big_endian>::emit_entry( | |
7740 | Copy_reloc_entry& entry, | |
7741 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section, | |
7742 | Symbol_table* symtab, Layout* layout, Target_mips<size, big_endian>* target) | |
7743 | { | |
7744 | // If the symbol is no longer defined in a dynamic object, then we | |
7745 | // emitted a COPY relocation, and we do not want to emit this | |
7746 | // dynamic relocation. | |
7747 | if (!entry.sym_->is_from_dynobj()) | |
7748 | return; | |
7749 | ||
7750 | bool can_make_dynamic = (entry.reloc_type_ == elfcpp::R_MIPS_32 | |
7751 | || entry.reloc_type_ == elfcpp::R_MIPS_REL32 | |
7752 | || entry.reloc_type_ == elfcpp::R_MIPS_64); | |
7753 | ||
7754 | Mips_symbol<size>* sym = Mips_symbol<size>::as_mips_sym(entry.sym_); | |
7755 | if (can_make_dynamic && !sym->has_static_relocs()) | |
7756 | { | |
7757 | Mips_relobj<size, big_endian>* object = | |
7758 | Mips_relobj<size, big_endian>::as_mips_relobj(entry.relobj_); | |
7759 | target->got_section(symtab, layout)->record_global_got_symbol( | |
7760 | sym, object, entry.reloc_type_, true, false); | |
7761 | if (!symbol_references_local(sym, sym->should_add_dynsym_entry(symtab))) | |
7762 | target->rel_dyn_section(layout)->add_global(sym, elfcpp::R_MIPS_REL32, | |
7763 | entry.output_section_, entry.relobj_, entry.shndx_, entry.address_); | |
7764 | else | |
7765 | target->rel_dyn_section(layout)->add_symbolless_global_addend( | |
7766 | sym, elfcpp::R_MIPS_REL32, entry.output_section_, entry.relobj_, | |
7767 | entry.shndx_, entry.address_); | |
7768 | } | |
7769 | else | |
7770 | this->make_copy_reloc(symtab, layout, | |
7771 | static_cast<Sized_symbol<size>*>(entry.sym_), | |
6eeb0170 | 7772 | entry.relobj_, |
9810d34d SS |
7773 | reloc_section); |
7774 | } | |
7775 | ||
7776 | // Target_mips methods. | |
7777 | ||
7778 | // Return the value to use for a dynamic symbol which requires special | |
7779 | // treatment. This is how we support equality comparisons of function | |
7780 | // pointers across shared library boundaries, as described in the | |
7781 | // processor specific ABI supplement. | |
7782 | ||
7783 | template<int size, bool big_endian> | |
7784 | uint64_t | |
7785 | Target_mips<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
7786 | { | |
7787 | uint64_t value = 0; | |
7788 | const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym); | |
7789 | ||
7790 | if (!mips_sym->has_lazy_stub()) | |
7791 | { | |
7792 | if (mips_sym->has_plt_offset()) | |
7793 | { | |
7794 | // We distinguish between PLT entries and lazy-binding stubs by | |
7795 | // giving the former an st_other value of STO_MIPS_PLT. Set the | |
7796 | // value to the stub address if there are any relocations in the | |
7797 | // binary where pointer equality matters. | |
7798 | if (mips_sym->pointer_equality_needed()) | |
7799 | { | |
7800 | // Prefer a standard MIPS PLT entry. | |
7801 | if (mips_sym->has_mips_plt_offset()) | |
7802 | value = this->plt_section()->mips_entry_address(mips_sym); | |
7803 | else | |
7804 | value = this->plt_section()->comp_entry_address(mips_sym) + 1; | |
7805 | } | |
7806 | else | |
7807 | value = 0; | |
7808 | } | |
7809 | } | |
7810 | else | |
7811 | { | |
7812 | // First, set stub offsets for symbols. This method expects that the | |
7813 | // number of entries in dynamic symbol table is set. | |
7814 | this->mips_stubs_section()->set_lazy_stub_offsets(); | |
7815 | ||
7816 | // The run-time linker uses the st_value field of the symbol | |
7817 | // to reset the global offset table entry for this external | |
7818 | // to its stub address when unlinking a shared object. | |
7819 | value = this->mips_stubs_section()->stub_address(mips_sym); | |
7820 | } | |
7821 | ||
7822 | if (mips_sym->has_mips16_fn_stub()) | |
7823 | { | |
7824 | // If we have a MIPS16 function with a stub, the dynamic symbol must | |
7825 | // refer to the stub, since only the stub uses the standard calling | |
7826 | // conventions. | |
7827 | value = mips_sym->template | |
7828 | get_mips16_fn_stub<big_endian>()->output_address(); | |
7829 | } | |
7830 | ||
7831 | return value; | |
7832 | } | |
7833 | ||
7834 | // Get the dynamic reloc section, creating it if necessary. It's always | |
7835 | // .rel.dyn, even for MIPS64. | |
7836 | ||
7837 | template<int size, bool big_endian> | |
7838 | typename Target_mips<size, big_endian>::Reloc_section* | |
7839 | Target_mips<size, big_endian>::rel_dyn_section(Layout* layout) | |
7840 | { | |
7841 | if (this->rel_dyn_ == NULL) | |
7842 | { | |
7843 | gold_assert(layout != NULL); | |
7844 | this->rel_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
7845 | layout->add_output_section_data(".rel.dyn", elfcpp::SHT_REL, | |
7846 | elfcpp::SHF_ALLOC, this->rel_dyn_, | |
7847 | ORDER_DYNAMIC_RELOCS, false); | |
7848 | ||
7849 | // First entry in .rel.dyn has to be null. | |
7850 | // This is hack - we define dummy output data and set its address to 0, | |
7851 | // and define absolute R_MIPS_NONE relocation with offset 0 against it. | |
7852 | // This ensures that the entry is null. | |
7853 | Output_data* od = new Output_data_zero_fill(0, 0); | |
7854 | od->set_address(0); | |
7855 | this->rel_dyn_->add_absolute(elfcpp::R_MIPS_NONE, od, 0); | |
7856 | } | |
7857 | return this->rel_dyn_; | |
7858 | } | |
7859 | ||
7860 | // Get the GOT section, creating it if necessary. | |
7861 | ||
7862 | template<int size, bool big_endian> | |
7863 | Mips_output_data_got<size, big_endian>* | |
7864 | Target_mips<size, big_endian>::got_section(Symbol_table* symtab, | |
7865 | Layout* layout) | |
7866 | { | |
7867 | if (this->got_ == NULL) | |
7868 | { | |
7869 | gold_assert(symtab != NULL && layout != NULL); | |
7870 | ||
7871 | this->got_ = new Mips_output_data_got<size, big_endian>(this, symtab, | |
7872 | layout); | |
7873 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
7874 | (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE | | |
7875 | elfcpp::SHF_MIPS_GPREL), | |
7876 | this->got_, ORDER_DATA, false); | |
7877 | ||
7878 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. | |
7879 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
7880 | Symbol_table::PREDEFINED, | |
7881 | this->got_, | |
7882 | 0, 0, elfcpp::STT_OBJECT, | |
7883 | elfcpp::STB_GLOBAL, | |
7884 | elfcpp::STV_DEFAULT, 0, | |
7885 | false, false); | |
7886 | } | |
7887 | ||
7888 | return this->got_; | |
7889 | } | |
7890 | ||
7891 | // Calculate value of _gp symbol. | |
7892 | ||
7893 | template<int size, bool big_endian> | |
7894 | void | |
7895 | Target_mips<size, big_endian>::set_gp(Layout* layout, Symbol_table* symtab) | |
7896 | { | |
7897 | if (this->gp_ != NULL) | |
7898 | return; | |
7899 | ||
7900 | Output_data* section = layout->find_output_section(".got"); | |
7901 | if (section == NULL) | |
7902 | { | |
7903 | // If there is no .got section, gp should be based on .sdata. | |
7904 | // TODO(sasa): This is probably not needed. This was needed for older | |
7905 | // MIPS architectures which accessed both GOT and .sdata section using | |
7906 | // gp-relative addressing. Modern Mips Linux ELF architectures don't | |
7907 | // access .sdata using gp-relative addressing. | |
7908 | for (Layout::Section_list::const_iterator | |
7909 | p = layout->section_list().begin(); | |
7910 | p != layout->section_list().end(); | |
7911 | ++p) | |
7912 | { | |
7913 | if (strcmp((*p)->name(), ".sdata") == 0) | |
7914 | { | |
7915 | section = *p; | |
7916 | break; | |
7917 | } | |
7918 | } | |
7919 | } | |
7920 | ||
7921 | Sized_symbol<size>* gp = | |
7922 | static_cast<Sized_symbol<size>*>(symtab->lookup("_gp")); | |
7923 | if (gp != NULL) | |
7924 | { | |
7925 | if (gp->source() != Symbol::IS_CONSTANT && section != NULL) | |
7926 | gp->init_output_data(gp->name(), NULL, section, MIPS_GP_OFFSET, 0, | |
7927 | elfcpp::STT_OBJECT, | |
7928 | elfcpp::STB_GLOBAL, | |
7929 | elfcpp::STV_DEFAULT, 0, | |
7930 | false, false); | |
7931 | this->gp_ = gp; | |
7932 | } | |
7933 | else if (section != NULL) | |
7934 | { | |
7935 | gp = static_cast<Sized_symbol<size>*>(symtab->define_in_output_data( | |
7936 | "_gp", NULL, Symbol_table::PREDEFINED, | |
7937 | section, MIPS_GP_OFFSET, 0, | |
7938 | elfcpp::STT_OBJECT, | |
7939 | elfcpp::STB_GLOBAL, | |
7940 | elfcpp::STV_DEFAULT, | |
7941 | 0, false, false)); | |
7942 | this->gp_ = gp; | |
7943 | } | |
7944 | } | |
7945 | ||
7946 | // Set the dynamic symbol indexes. INDEX is the index of the first | |
7947 | // global dynamic symbol. Pointers to the symbols are stored into the | |
7948 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
7949 | // updated dynamic symbol index. | |
7950 | ||
7951 | template<int size, bool big_endian> | |
7952 | unsigned int | |
7953 | Target_mips<size, big_endian>::do_set_dynsym_indexes( | |
7954 | std::vector<Symbol*>* dyn_symbols, unsigned int index, | |
7955 | std::vector<Symbol*>* syms, Stringpool* dynpool, | |
7956 | Versions* versions, Symbol_table* symtab) const | |
7957 | { | |
7958 | std::vector<Symbol*> non_got_symbols; | |
7959 | std::vector<Symbol*> got_symbols; | |
7960 | ||
7961 | reorder_dyn_symbols<size, big_endian>(dyn_symbols, &non_got_symbols, | |
7962 | &got_symbols); | |
7963 | ||
7964 | for (std::vector<Symbol*>::iterator p = non_got_symbols.begin(); | |
7965 | p != non_got_symbols.end(); | |
7966 | ++p) | |
7967 | { | |
7968 | Symbol* sym = *p; | |
7969 | ||
7970 | // Note that SYM may already have a dynamic symbol index, since | |
7971 | // some symbols appear more than once in the symbol table, with | |
7972 | // and without a version. | |
7973 | ||
7974 | if (!sym->has_dynsym_index()) | |
7975 | { | |
7976 | sym->set_dynsym_index(index); | |
7977 | ++index; | |
7978 | syms->push_back(sym); | |
7979 | dynpool->add(sym->name(), false, NULL); | |
7980 | ||
7981 | // Record any version information. | |
7982 | if (sym->version() != NULL) | |
7983 | versions->record_version(symtab, dynpool, sym); | |
7984 | ||
7985 | // If the symbol is defined in a dynamic object and is | |
7986 | // referenced in a regular object, then mark the dynamic | |
7987 | // object as needed. This is used to implement --as-needed. | |
7988 | if (sym->is_from_dynobj() && sym->in_reg()) | |
7989 | sym->object()->set_is_needed(); | |
7990 | } | |
7991 | } | |
7992 | ||
7993 | for (std::vector<Symbol*>::iterator p = got_symbols.begin(); | |
7994 | p != got_symbols.end(); | |
7995 | ++p) | |
7996 | { | |
7997 | Symbol* sym = *p; | |
7998 | if (!sym->has_dynsym_index()) | |
7999 | { | |
8000 | // Record any version information. | |
8001 | if (sym->version() != NULL) | |
8002 | versions->record_version(symtab, dynpool, sym); | |
8003 | } | |
8004 | } | |
8005 | ||
8006 | index = versions->finalize(symtab, index, syms); | |
8007 | ||
8008 | int got_sym_count = 0; | |
8009 | for (std::vector<Symbol*>::iterator p = got_symbols.begin(); | |
8010 | p != got_symbols.end(); | |
8011 | ++p) | |
8012 | { | |
8013 | Symbol* sym = *p; | |
8014 | ||
8015 | if (!sym->has_dynsym_index()) | |
8016 | { | |
8017 | ++got_sym_count; | |
8018 | sym->set_dynsym_index(index); | |
8019 | ++index; | |
8020 | syms->push_back(sym); | |
8021 | dynpool->add(sym->name(), false, NULL); | |
8022 | ||
8023 | // If the symbol is defined in a dynamic object and is | |
8024 | // referenced in a regular object, then mark the dynamic | |
8025 | // object as needed. This is used to implement --as-needed. | |
8026 | if (sym->is_from_dynobj() && sym->in_reg()) | |
8027 | sym->object()->set_is_needed(); | |
8028 | } | |
8029 | } | |
8030 | ||
8031 | // Set index of the first symbol that has .got entry. | |
8032 | this->got_->set_first_global_got_dynsym_index( | |
8033 | got_sym_count > 0 ? index - got_sym_count : -1U); | |
8034 | ||
8035 | if (this->mips_stubs_ != NULL) | |
8036 | this->mips_stubs_->set_dynsym_count(index); | |
8037 | ||
8038 | return index; | |
8039 | } | |
8040 | ||
8041 | // Create a PLT entry for a global symbol referenced by r_type relocation. | |
8042 | ||
8043 | template<int size, bool big_endian> | |
8044 | void | |
8045 | Target_mips<size, big_endian>::make_plt_entry(Symbol_table* symtab, | |
8046 | Layout* layout, | |
8047 | Mips_symbol<size>* gsym, | |
8048 | unsigned int r_type) | |
8049 | { | |
8050 | if (gsym->has_lazy_stub() || gsym->has_plt_offset()) | |
8051 | return; | |
8052 | ||
8053 | if (this->plt_ == NULL) | |
8054 | { | |
8055 | // Create the GOT section first. | |
8056 | this->got_section(symtab, layout); | |
8057 | ||
8058 | this->got_plt_ = new Output_data_space(4, "** GOT PLT"); | |
8059 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
8060 | (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), | |
8061 | this->got_plt_, ORDER_DATA, false); | |
8062 | ||
8063 | // The first two entries are reserved. | |
8064 | this->got_plt_->set_current_data_size(2 * size/8); | |
8065 | ||
8066 | this->plt_ = new Mips_output_data_plt<size, big_endian>(layout, | |
8067 | this->got_plt_, | |
8068 | this); | |
8069 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
8070 | (elfcpp::SHF_ALLOC | |
8071 | | elfcpp::SHF_EXECINSTR), | |
8072 | this->plt_, ORDER_PLT, false); | |
8073 | } | |
8074 | ||
8075 | this->plt_->add_entry(gsym, r_type); | |
8076 | } | |
8077 | ||
8078 | ||
8079 | // Get the .MIPS.stubs section, creating it if necessary. | |
8080 | ||
8081 | template<int size, bool big_endian> | |
8082 | Mips_output_data_mips_stubs<size, big_endian>* | |
8083 | Target_mips<size, big_endian>::mips_stubs_section(Layout* layout) | |
8084 | { | |
8085 | if (this->mips_stubs_ == NULL) | |
8086 | { | |
8087 | this->mips_stubs_ = | |
8088 | new Mips_output_data_mips_stubs<size, big_endian>(this); | |
8089 | layout->add_output_section_data(".MIPS.stubs", elfcpp::SHT_PROGBITS, | |
8090 | (elfcpp::SHF_ALLOC | |
8091 | | elfcpp::SHF_EXECINSTR), | |
8092 | this->mips_stubs_, ORDER_PLT, false); | |
8093 | } | |
8094 | return this->mips_stubs_; | |
8095 | } | |
8096 | ||
8097 | // Get the LA25 stub section, creating it if necessary. | |
8098 | ||
8099 | template<int size, bool big_endian> | |
8100 | Mips_output_data_la25_stub<size, big_endian>* | |
8101 | Target_mips<size, big_endian>::la25_stub_section(Layout* layout) | |
8102 | { | |
8103 | if (this->la25_stub_ == NULL) | |
8104 | { | |
8105 | this->la25_stub_ = new Mips_output_data_la25_stub<size, big_endian>(); | |
8106 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
8107 | (elfcpp::SHF_ALLOC | |
8108 | | elfcpp::SHF_EXECINSTR), | |
8109 | this->la25_stub_, ORDER_TEXT, false); | |
8110 | } | |
8111 | return this->la25_stub_; | |
8112 | } | |
8113 | ||
8114 | // Process the relocations to determine unreferenced sections for | |
8115 | // garbage collection. | |
8116 | ||
8117 | template<int size, bool big_endian> | |
8118 | void | |
8119 | Target_mips<size, big_endian>::gc_process_relocs( | |
8120 | Symbol_table* symtab, | |
8121 | Layout* layout, | |
8122 | Sized_relobj_file<size, big_endian>* object, | |
8123 | unsigned int data_shndx, | |
47a9f4fc | 8124 | unsigned int sh_type, |
9810d34d SS |
8125 | const unsigned char* prelocs, |
8126 | size_t reloc_count, | |
8127 | Output_section* output_section, | |
8128 | bool needs_special_offset_handling, | |
8129 | size_t local_symbol_count, | |
8130 | const unsigned char* plocal_symbols) | |
8131 | { | |
8132 | typedef Target_mips<size, big_endian> Mips; | |
9810d34d | 8133 | |
47a9f4fc VR |
8134 | if (sh_type == elfcpp::SHT_REL) |
8135 | { | |
8136 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
8137 | Classify_reloc; | |
8138 | ||
8139 | gold::gc_process_relocs<size, big_endian, Mips, Scan, Classify_reloc>( | |
8140 | symtab, | |
8141 | layout, | |
8142 | this, | |
8143 | object, | |
8144 | data_shndx, | |
8145 | prelocs, | |
8146 | reloc_count, | |
8147 | output_section, | |
8148 | needs_special_offset_handling, | |
8149 | local_symbol_count, | |
8150 | plocal_symbols); | |
8151 | } | |
8152 | else if (sh_type == elfcpp::SHT_RELA) | |
8153 | { | |
8154 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
8155 | Classify_reloc; | |
8156 | ||
8157 | gold::gc_process_relocs<size, big_endian, Mips, Scan, Classify_reloc>( | |
8158 | symtab, | |
8159 | layout, | |
8160 | this, | |
8161 | object, | |
8162 | data_shndx, | |
8163 | prelocs, | |
8164 | reloc_count, | |
8165 | output_section, | |
8166 | needs_special_offset_handling, | |
8167 | local_symbol_count, | |
8168 | plocal_symbols); | |
8169 | } | |
8170 | else | |
8171 | gold_unreachable(); | |
9810d34d SS |
8172 | } |
8173 | ||
8174 | // Scan relocations for a section. | |
8175 | ||
8176 | template<int size, bool big_endian> | |
8177 | void | |
8178 | Target_mips<size, big_endian>::scan_relocs( | |
8179 | Symbol_table* symtab, | |
8180 | Layout* layout, | |
8181 | Sized_relobj_file<size, big_endian>* object, | |
8182 | unsigned int data_shndx, | |
8183 | unsigned int sh_type, | |
8184 | const unsigned char* prelocs, | |
8185 | size_t reloc_count, | |
8186 | Output_section* output_section, | |
8187 | bool needs_special_offset_handling, | |
8188 | size_t local_symbol_count, | |
8189 | const unsigned char* plocal_symbols) | |
8190 | { | |
8191 | typedef Target_mips<size, big_endian> Mips; | |
9810d34d SS |
8192 | |
8193 | if (sh_type == elfcpp::SHT_REL) | |
4d625b70 CC |
8194 | { |
8195 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
8196 | Classify_reloc; | |
8197 | ||
8198 | gold::scan_relocs<size, big_endian, Mips, Scan, Classify_reloc>( | |
8199 | symtab, | |
8200 | layout, | |
8201 | this, | |
8202 | object, | |
8203 | data_shndx, | |
8204 | prelocs, | |
8205 | reloc_count, | |
8206 | output_section, | |
8207 | needs_special_offset_handling, | |
8208 | local_symbol_count, | |
8209 | plocal_symbols); | |
8210 | } | |
9810d34d | 8211 | else if (sh_type == elfcpp::SHT_RELA) |
4d625b70 CC |
8212 | { |
8213 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
8214 | Classify_reloc; | |
8215 | ||
8216 | gold::scan_relocs<size, big_endian, Mips, Scan, Classify_reloc>( | |
8217 | symtab, | |
8218 | layout, | |
8219 | this, | |
8220 | object, | |
8221 | data_shndx, | |
8222 | prelocs, | |
8223 | reloc_count, | |
8224 | output_section, | |
8225 | needs_special_offset_handling, | |
8226 | local_symbol_count, | |
8227 | plocal_symbols); | |
8228 | } | |
9810d34d SS |
8229 | } |
8230 | ||
8231 | template<int size, bool big_endian> | |
8232 | bool | |
8233 | Target_mips<size, big_endian>::mips_32bit_flags(elfcpp::Elf_Word flags) | |
8234 | { | |
8235 | return ((flags & elfcpp::EF_MIPS_32BITMODE) != 0 | |
8236 | || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_O32 | |
8237 | || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_EABI32 | |
8238 | || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_1 | |
8239 | || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_2 | |
8240 | || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32 | |
8241 | || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32R2); | |
8242 | } | |
8243 | ||
8244 | // Return the MACH for a MIPS e_flags value. | |
8245 | template<int size, bool big_endian> | |
8246 | unsigned int | |
8247 | Target_mips<size, big_endian>::elf_mips_mach(elfcpp::Elf_Word flags) | |
8248 | { | |
8249 | switch (flags & elfcpp::EF_MIPS_MACH) | |
8250 | { | |
8251 | case elfcpp::E_MIPS_MACH_3900: | |
8252 | return mach_mips3900; | |
8253 | ||
8254 | case elfcpp::E_MIPS_MACH_4010: | |
8255 | return mach_mips4010; | |
8256 | ||
8257 | case elfcpp::E_MIPS_MACH_4100: | |
8258 | return mach_mips4100; | |
8259 | ||
8260 | case elfcpp::E_MIPS_MACH_4111: | |
8261 | return mach_mips4111; | |
8262 | ||
8263 | case elfcpp::E_MIPS_MACH_4120: | |
8264 | return mach_mips4120; | |
8265 | ||
8266 | case elfcpp::E_MIPS_MACH_4650: | |
8267 | return mach_mips4650; | |
8268 | ||
8269 | case elfcpp::E_MIPS_MACH_5400: | |
8270 | return mach_mips5400; | |
8271 | ||
8272 | case elfcpp::E_MIPS_MACH_5500: | |
8273 | return mach_mips5500; | |
8274 | ||
8275 | case elfcpp::E_MIPS_MACH_9000: | |
8276 | return mach_mips9000; | |
8277 | ||
8278 | case elfcpp::E_MIPS_MACH_SB1: | |
8279 | return mach_mips_sb1; | |
8280 | ||
8281 | case elfcpp::E_MIPS_MACH_LS2E: | |
8282 | return mach_mips_loongson_2e; | |
8283 | ||
8284 | case elfcpp::E_MIPS_MACH_LS2F: | |
8285 | return mach_mips_loongson_2f; | |
8286 | ||
8287 | case elfcpp::E_MIPS_MACH_LS3A: | |
8288 | return mach_mips_loongson_3a; | |
8289 | ||
8290 | case elfcpp::E_MIPS_MACH_OCTEON2: | |
8291 | return mach_mips_octeon2; | |
8292 | ||
8293 | case elfcpp::E_MIPS_MACH_OCTEON: | |
8294 | return mach_mips_octeon; | |
8295 | ||
8296 | case elfcpp::E_MIPS_MACH_XLR: | |
8297 | return mach_mips_xlr; | |
8298 | ||
8299 | default: | |
8300 | switch (flags & elfcpp::EF_MIPS_ARCH) | |
8301 | { | |
8302 | default: | |
8303 | case elfcpp::E_MIPS_ARCH_1: | |
8304 | return mach_mips3000; | |
8305 | ||
8306 | case elfcpp::E_MIPS_ARCH_2: | |
8307 | return mach_mips6000; | |
8308 | ||
8309 | case elfcpp::E_MIPS_ARCH_3: | |
8310 | return mach_mips4000; | |
8311 | ||
8312 | case elfcpp::E_MIPS_ARCH_4: | |
8313 | return mach_mips8000; | |
8314 | ||
8315 | case elfcpp::E_MIPS_ARCH_5: | |
8316 | return mach_mips5; | |
8317 | ||
8318 | case elfcpp::E_MIPS_ARCH_32: | |
8319 | return mach_mipsisa32; | |
8320 | ||
8321 | case elfcpp::E_MIPS_ARCH_64: | |
8322 | return mach_mipsisa64; | |
8323 | ||
8324 | case elfcpp::E_MIPS_ARCH_32R2: | |
8325 | return mach_mipsisa32r2; | |
8326 | ||
8327 | case elfcpp::E_MIPS_ARCH_64R2: | |
8328 | return mach_mipsisa64r2; | |
8329 | } | |
8330 | } | |
8331 | ||
8332 | return 0; | |
8333 | } | |
8334 | ||
8335 | // Check whether machine EXTENSION is an extension of machine BASE. | |
8336 | template<int size, bool big_endian> | |
8337 | bool | |
8338 | Target_mips<size, big_endian>::mips_mach_extends(unsigned int base, | |
8339 | unsigned int extension) | |
8340 | { | |
8341 | if (extension == base) | |
8342 | return true; | |
8343 | ||
8344 | if ((base == mach_mipsisa32) | |
8345 | && this->mips_mach_extends(mach_mipsisa64, extension)) | |
8346 | return true; | |
8347 | ||
8348 | if ((base == mach_mipsisa32r2) | |
8349 | && this->mips_mach_extends(mach_mipsisa64r2, extension)) | |
8350 | return true; | |
8351 | ||
8352 | for (unsigned int i = 0; i < this->mips_mach_extensions_.size(); ++i) | |
8353 | if (extension == this->mips_mach_extensions_[i].first) | |
8354 | { | |
8355 | extension = this->mips_mach_extensions_[i].second; | |
8356 | if (extension == base) | |
8357 | return true; | |
8358 | } | |
8359 | ||
8360 | return false; | |
8361 | } | |
8362 | ||
8363 | template<int size, bool big_endian> | |
8364 | void | |
8365 | Target_mips<size, big_endian>::merge_processor_specific_flags( | |
01b84e25 | 8366 | const std::string& name, elfcpp::Elf_Word in_flags, bool dyn_obj) |
9810d34d SS |
8367 | { |
8368 | // If flags are not set yet, just copy them. | |
8369 | if (!this->are_processor_specific_flags_set()) | |
8370 | { | |
8371 | this->set_processor_specific_flags(in_flags); | |
9810d34d SS |
8372 | this->mach_ = this->elf_mips_mach(in_flags); |
8373 | return; | |
8374 | } | |
8375 | ||
8376 | elfcpp::Elf_Word new_flags = in_flags; | |
8377 | elfcpp::Elf_Word old_flags = this->processor_specific_flags(); | |
8378 | elfcpp::Elf_Word merged_flags = this->processor_specific_flags(); | |
8379 | merged_flags |= new_flags & elfcpp::EF_MIPS_NOREORDER; | |
8380 | ||
8381 | // Check flag compatibility. | |
8382 | new_flags &= ~elfcpp::EF_MIPS_NOREORDER; | |
8383 | old_flags &= ~elfcpp::EF_MIPS_NOREORDER; | |
8384 | ||
8385 | // Some IRIX 6 BSD-compatibility objects have this bit set. It | |
8386 | // doesn't seem to matter. | |
8387 | new_flags &= ~elfcpp::EF_MIPS_XGOT; | |
8388 | old_flags &= ~elfcpp::EF_MIPS_XGOT; | |
8389 | ||
8390 | // MIPSpro generates ucode info in n64 objects. Again, we should | |
8391 | // just be able to ignore this. | |
8392 | new_flags &= ~elfcpp::EF_MIPS_UCODE; | |
8393 | old_flags &= ~elfcpp::EF_MIPS_UCODE; | |
8394 | ||
8395 | // DSOs should only be linked with CPIC code. | |
8396 | if (dyn_obj) | |
8397 | new_flags |= elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC; | |
8398 | ||
8399 | if (new_flags == old_flags) | |
8400 | { | |
8401 | this->set_processor_specific_flags(merged_flags); | |
8402 | return; | |
8403 | } | |
8404 | ||
8405 | if (((new_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0) | |
8406 | != ((old_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0)) | |
8407 | gold_warning(_("%s: linking abicalls files with non-abicalls files"), | |
8408 | name.c_str()); | |
8409 | ||
8410 | if (new_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) | |
8411 | merged_flags |= elfcpp::EF_MIPS_CPIC; | |
8412 | if (!(new_flags & elfcpp::EF_MIPS_PIC)) | |
8413 | merged_flags &= ~elfcpp::EF_MIPS_PIC; | |
8414 | ||
8415 | new_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC); | |
8416 | old_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC); | |
8417 | ||
8418 | // Compare the ISAs. | |
8419 | if (mips_32bit_flags(old_flags) != mips_32bit_flags(new_flags)) | |
8420 | gold_error(_("%s: linking 32-bit code with 64-bit code"), name.c_str()); | |
8421 | else if (!this->mips_mach_extends(this->elf_mips_mach(in_flags), this->mach_)) | |
8422 | { | |
8423 | // Output ISA isn't the same as, or an extension of, input ISA. | |
8424 | if (this->mips_mach_extends(this->mach_, this->elf_mips_mach(in_flags))) | |
8425 | { | |
8426 | // Copy the architecture info from input object to output. Also copy | |
8427 | // the 32-bit flag (if set) so that we continue to recognise | |
8428 | // output as a 32-bit binary. | |
8429 | this->mach_ = this->elf_mips_mach(in_flags); | |
8430 | merged_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH); | |
8431 | merged_flags |= (new_flags & (elfcpp::EF_MIPS_ARCH | |
8432 | | elfcpp::EF_MIPS_MACH | elfcpp::EF_MIPS_32BITMODE)); | |
8433 | ||
8434 | // Copy across the ABI flags if output doesn't use them | |
8435 | // and if that was what caused us to treat input object as 32-bit. | |
8436 | if ((old_flags & elfcpp::EF_MIPS_ABI) == 0 | |
8437 | && this->mips_32bit_flags(new_flags) | |
8438 | && !this->mips_32bit_flags(new_flags & ~elfcpp::EF_MIPS_ABI)) | |
8439 | merged_flags |= new_flags & elfcpp::EF_MIPS_ABI; | |
8440 | } | |
8441 | else | |
8442 | // The ISAs aren't compatible. | |
8443 | gold_error(_("%s: linking %s module with previous %s modules"), | |
8444 | name.c_str(), this->elf_mips_mach_name(in_flags), | |
8445 | this->elf_mips_mach_name(merged_flags)); | |
8446 | } | |
8447 | ||
8448 | new_flags &= (~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | |
8449 | | elfcpp::EF_MIPS_32BITMODE)); | |
8450 | old_flags &= (~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | |
8451 | | elfcpp::EF_MIPS_32BITMODE)); | |
8452 | ||
01b84e25 VR |
8453 | // Compare ABIs. |
8454 | if ((new_flags & elfcpp::EF_MIPS_ABI) != (old_flags & elfcpp::EF_MIPS_ABI)) | |
9810d34d SS |
8455 | { |
8456 | // Only error if both are set (to different values). | |
01b84e25 | 8457 | if ((new_flags & elfcpp::EF_MIPS_ABI) |
9810d34d | 8458 | && (old_flags & elfcpp::EF_MIPS_ABI)) |
9810d34d SS |
8459 | gold_error(_("%s: ABI mismatch: linking %s module with " |
8460 | "previous %s modules"), name.c_str(), | |
01b84e25 VR |
8461 | this->elf_mips_abi_name(in_flags), |
8462 | this->elf_mips_abi_name(merged_flags)); | |
9810d34d SS |
8463 | |
8464 | new_flags &= ~elfcpp::EF_MIPS_ABI; | |
8465 | old_flags &= ~elfcpp::EF_MIPS_ABI; | |
8466 | } | |
8467 | ||
8468 | // Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together | |
8469 | // and allow arbitrary mixing of the remaining ASEs (retain the union). | |
8470 | if ((new_flags & elfcpp::EF_MIPS_ARCH_ASE) | |
8471 | != (old_flags & elfcpp::EF_MIPS_ARCH_ASE)) | |
8472 | { | |
8473 | int old_micro = old_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS; | |
8474 | int new_micro = new_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS; | |
8475 | int old_m16 = old_flags & elfcpp::EF_MIPS_ARCH_ASE_M16; | |
8476 | int new_m16 = new_flags & elfcpp::EF_MIPS_ARCH_ASE_M16; | |
8477 | int micro_mis = old_m16 && new_micro; | |
8478 | int m16_mis = old_micro && new_m16; | |
8479 | ||
8480 | if (m16_mis || micro_mis) | |
8481 | gold_error(_("%s: ASE mismatch: linking %s module with " | |
8482 | "previous %s modules"), name.c_str(), | |
8483 | m16_mis ? "MIPS16" : "microMIPS", | |
8484 | m16_mis ? "microMIPS" : "MIPS16"); | |
8485 | ||
8486 | merged_flags |= new_flags & elfcpp::EF_MIPS_ARCH_ASE; | |
8487 | ||
8488 | new_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE; | |
8489 | old_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE; | |
8490 | } | |
8491 | ||
8492 | // Warn about any other mismatches. | |
8493 | if (new_flags != old_flags) | |
8494 | gold_error(_("%s: uses different e_flags (0x%x) fields than previous " | |
8495 | "modules (0x%x)"), name.c_str(), new_flags, old_flags); | |
8496 | ||
8497 | this->set_processor_specific_flags(merged_flags); | |
8498 | } | |
8499 | ||
8500 | // Adjust ELF file header. | |
8501 | ||
8502 | template<int size, bool big_endian> | |
8503 | void | |
8504 | Target_mips<size, big_endian>::do_adjust_elf_header( | |
8505 | unsigned char* view, | |
8506 | int len) | |
8507 | { | |
8508 | gold_assert(len == elfcpp::Elf_sizes<size>::ehdr_size); | |
8509 | ||
01b84e25 VR |
8510 | if (!this->entry_symbol_is_compressed_) |
8511 | return; | |
9810d34d | 8512 | |
01b84e25 | 8513 | elfcpp::Ehdr<size, big_endian> ehdr(view); |
9810d34d | 8514 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); |
01b84e25 VR |
8515 | |
8516 | oehdr.put_e_entry(ehdr.get_e_entry() + 1); | |
9810d34d SS |
8517 | } |
8518 | ||
8519 | // do_make_elf_object to override the same function in the base class. | |
8520 | // We need to use a target-specific sub-class of | |
8521 | // Sized_relobj_file<size, big_endian> to store Mips specific information. | |
8522 | // Hence we need to have our own ELF object creation. | |
8523 | ||
8524 | template<int size, bool big_endian> | |
8525 | Object* | |
8526 | Target_mips<size, big_endian>::do_make_elf_object( | |
8527 | const std::string& name, | |
8528 | Input_file* input_file, | |
8529 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
8530 | { | |
8531 | int et = ehdr.get_e_type(); | |
8532 | // ET_EXEC files are valid input for --just-symbols/-R, | |
8533 | // and we treat them as relocatable objects. | |
8534 | if (et == elfcpp::ET_REL | |
8535 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
8536 | { | |
8537 | Mips_relobj<size, big_endian>* obj = | |
8538 | new Mips_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
8539 | obj->setup(); | |
8540 | return obj; | |
8541 | } | |
8542 | else if (et == elfcpp::ET_DYN) | |
8543 | { | |
8544 | // TODO(sasa): Should we create Mips_dynobj? | |
8545 | return Target::do_make_elf_object(name, input_file, offset, ehdr); | |
8546 | } | |
8547 | else | |
8548 | { | |
8549 | gold_error(_("%s: unsupported ELF file type %d"), | |
8550 | name.c_str(), et); | |
8551 | return NULL; | |
8552 | } | |
8553 | } | |
8554 | ||
8555 | // Finalize the sections. | |
8556 | ||
8557 | template <int size, bool big_endian> | |
8558 | void | |
8559 | Target_mips<size, big_endian>::do_finalize_sections(Layout* layout, | |
8560 | const Input_objects* input_objects, | |
8561 | Symbol_table* symtab) | |
8562 | { | |
8563 | // Add +1 to MIPS16 and microMIPS init_ and _fini symbols so that DT_INIT and | |
8564 | // DT_FINI have correct values. | |
8565 | Mips_symbol<size>* init = static_cast<Mips_symbol<size>*>( | |
8566 | symtab->lookup(parameters->options().init())); | |
8567 | if (init != NULL && (init->is_mips16() || init->is_micromips())) | |
8568 | init->set_value(init->value() | 1); | |
8569 | Mips_symbol<size>* fini = static_cast<Mips_symbol<size>*>( | |
8570 | symtab->lookup(parameters->options().fini())); | |
8571 | if (fini != NULL && (fini->is_mips16() || fini->is_micromips())) | |
8572 | fini->set_value(fini->value() | 1); | |
8573 | ||
8574 | // Check whether the entry symbol is mips16 or micromips. This is needed to | |
8575 | // adjust entry address in ELF header. | |
8576 | Mips_symbol<size>* entry = | |
8577 | static_cast<Mips_symbol<size>*>(symtab->lookup(this->entry_symbol_name())); | |
8578 | this->entry_symbol_is_compressed_ = (entry != NULL && (entry->is_mips16() | |
8579 | || entry->is_micromips())); | |
8580 | ||
8581 | if (!parameters->doing_static_link() | |
8582 | && (strcmp(parameters->options().hash_style(), "gnu") == 0 | |
8583 | || strcmp(parameters->options().hash_style(), "both") == 0)) | |
8584 | { | |
8585 | // .gnu.hash and the MIPS ABI require .dynsym to be sorted in different | |
8586 | // ways. .gnu.hash needs symbols to be grouped by hash code whereas the | |
8587 | // MIPS ABI requires a mapping between the GOT and the symbol table. | |
8588 | gold_error(".gnu.hash is incompatible with the MIPS ABI"); | |
8589 | } | |
8590 | ||
8591 | // Check whether the final section that was scanned has HI16 or GOT16 | |
8592 | // relocations without the corresponding LO16 part. | |
8593 | if (this->got16_addends_.size() > 0) | |
8594 | gold_error("Can't find matching LO16 reloc"); | |
8595 | ||
8596 | // Set _gp value. | |
8597 | this->set_gp(layout, symtab); | |
8598 | ||
8599 | // Check for any mips16 stub sections that we can discard. | |
8600 | if (!parameters->options().relocatable()) | |
8601 | { | |
8602 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); | |
8603 | p != input_objects->relobj_end(); | |
8604 | ++p) | |
8605 | { | |
8606 | Mips_relobj<size, big_endian>* object = | |
8607 | Mips_relobj<size, big_endian>::as_mips_relobj(*p); | |
8608 | object->discard_mips16_stub_sections(symtab); | |
8609 | } | |
8610 | } | |
8611 | ||
8612 | // Merge processor-specific flags. | |
8613 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); | |
8614 | p != input_objects->relobj_end(); | |
8615 | ++p) | |
8616 | { | |
8617 | Mips_relobj<size, big_endian>* relobj = | |
8618 | Mips_relobj<size, big_endian>::as_mips_relobj(*p); | |
8619 | ||
8620 | Input_file::Format format = relobj->input_file()->format(); | |
8621 | if (format == Input_file::FORMAT_ELF) | |
8622 | { | |
8623 | // Read processor-specific flags in ELF file header. | |
8624 | const unsigned char* pehdr = relobj->get_view( | |
8625 | elfcpp::file_header_offset, | |
8626 | elfcpp::Elf_sizes<size>::ehdr_size, | |
8627 | true, false); | |
8628 | ||
8629 | elfcpp::Ehdr<size, big_endian> ehdr(pehdr); | |
8630 | elfcpp::Elf_Word in_flags = ehdr.get_e_flags(); | |
47a9f4fc VR |
8631 | // If all input sections will be discarded, don't use this object |
8632 | // file for merging processor specific flags. | |
8633 | bool should_merge_processor_specific_flags = false; | |
8634 | ||
8635 | for (unsigned int i = 1; i < relobj->shnum(); ++i) | |
8636 | if (relobj->output_section(i) != NULL) | |
8637 | { | |
8638 | should_merge_processor_specific_flags = true; | |
8639 | break; | |
8640 | } | |
9810d34d | 8641 | |
47a9f4fc VR |
8642 | if (should_merge_processor_specific_flags) |
8643 | this->merge_processor_specific_flags(relobj->name(), in_flags, | |
01b84e25 | 8644 | false); |
9810d34d SS |
8645 | } |
8646 | } | |
8647 | ||
8648 | for (Input_objects::Dynobj_iterator p = input_objects->dynobj_begin(); | |
8649 | p != input_objects->dynobj_end(); | |
8650 | ++p) | |
8651 | { | |
8652 | Sized_dynobj<size, big_endian>* dynobj = | |
8653 | static_cast<Sized_dynobj<size, big_endian>*>(*p); | |
8654 | ||
8655 | // Read processor-specific flags. | |
8656 | const unsigned char* pehdr = dynobj->get_view(elfcpp::file_header_offset, | |
8657 | elfcpp::Elf_sizes<size>::ehdr_size, | |
8658 | true, false); | |
8659 | ||
8660 | elfcpp::Ehdr<size, big_endian> ehdr(pehdr); | |
8661 | elfcpp::Elf_Word in_flags = ehdr.get_e_flags(); | |
9810d34d | 8662 | |
01b84e25 | 8663 | this->merge_processor_specific_flags(dynobj->name(), in_flags, true); |
9810d34d SS |
8664 | } |
8665 | ||
8666 | // Merge .reginfo contents of input objects. | |
8667 | Valtype gprmask = 0; | |
8668 | Valtype cprmask1 = 0; | |
8669 | Valtype cprmask2 = 0; | |
8670 | Valtype cprmask3 = 0; | |
8671 | Valtype cprmask4 = 0; | |
8672 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); | |
8673 | p != input_objects->relobj_end(); | |
8674 | ++p) | |
8675 | { | |
8676 | Mips_relobj<size, big_endian>* relobj = | |
8677 | Mips_relobj<size, big_endian>::as_mips_relobj(*p); | |
8678 | ||
8679 | gprmask |= relobj->gprmask(); | |
8680 | cprmask1 |= relobj->cprmask1(); | |
8681 | cprmask2 |= relobj->cprmask2(); | |
8682 | cprmask3 |= relobj->cprmask3(); | |
8683 | cprmask4 |= relobj->cprmask4(); | |
8684 | } | |
8685 | ||
8686 | if (this->plt_ != NULL) | |
8687 | { | |
8688 | // Set final PLT offsets for symbols. | |
8689 | this->plt_section()->set_plt_offsets(); | |
8690 | ||
8691 | // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. | |
8692 | // Set STO_MICROMIPS flag if the output has microMIPS code, but only if | |
8693 | // there are no standard PLT entries present. | |
8694 | unsigned char nonvis = 0; | |
8695 | if (this->is_output_micromips() | |
8696 | && !this->plt_section()->has_standard_entries()) | |
8697 | nonvis = elfcpp::STO_MICROMIPS >> 2; | |
8698 | symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, | |
8699 | Symbol_table::PREDEFINED, | |
8700 | this->plt_, | |
8701 | 0, 0, elfcpp::STT_FUNC, | |
8702 | elfcpp::STB_LOCAL, | |
8703 | elfcpp::STV_DEFAULT, nonvis, | |
8704 | false, false); | |
8705 | } | |
8706 | ||
8707 | if (this->mips_stubs_ != NULL) | |
8708 | { | |
8709 | // Define _MIPS_STUBS_ at the start of the .MIPS.stubs section. | |
8710 | unsigned char nonvis = 0; | |
8711 | if (this->is_output_micromips()) | |
8712 | nonvis = elfcpp::STO_MICROMIPS >> 2; | |
8713 | symtab->define_in_output_data("_MIPS_STUBS_", NULL, | |
8714 | Symbol_table::PREDEFINED, | |
8715 | this->mips_stubs_, | |
8716 | 0, 0, elfcpp::STT_FUNC, | |
8717 | elfcpp::STB_LOCAL, | |
8718 | elfcpp::STV_DEFAULT, nonvis, | |
8719 | false, false); | |
8720 | } | |
8721 | ||
8722 | if (!parameters->options().relocatable() && !parameters->doing_static_link()) | |
8723 | // In case there is no .got section, create one. | |
8724 | this->got_section(symtab, layout); | |
8725 | ||
8726 | // Emit any relocs we saved in an attempt to avoid generating COPY | |
8727 | // relocs. | |
8728 | if (this->copy_relocs_.any_saved_relocs()) | |
8729 | this->copy_relocs_.emit_mips(this->rel_dyn_section(layout), symtab, layout, | |
8730 | this); | |
8731 | ||
8732 | // Emit dynamic relocs. | |
8733 | for (typename std::vector<Dyn_reloc>::iterator p = this->dyn_relocs_.begin(); | |
8734 | p != this->dyn_relocs_.end(); | |
8735 | ++p) | |
8736 | p->emit(this->rel_dyn_section(layout), this->got_section(), symtab); | |
8737 | ||
8738 | if (this->has_got_section()) | |
8739 | this->got_section()->lay_out_got(layout, symtab, input_objects); | |
8740 | ||
8741 | if (this->mips_stubs_ != NULL) | |
8742 | this->mips_stubs_->set_needs_dynsym_value(); | |
8743 | ||
8744 | // Check for functions that might need $25 to be valid on entry. | |
8745 | // TODO(sasa): Can we do this without iterating over all symbols? | |
8746 | typedef Symbol_visitor_check_symbols<size, big_endian> Symbol_visitor; | |
8747 | symtab->for_all_symbols<size, Symbol_visitor>(Symbol_visitor(this, layout, | |
8748 | symtab)); | |
8749 | ||
8750 | // Add NULL segment. | |
8751 | if (!parameters->options().relocatable()) | |
8752 | layout->make_output_segment(elfcpp::PT_NULL, 0); | |
8753 | ||
8754 | for (Layout::Section_list::const_iterator p = layout->section_list().begin(); | |
8755 | p != layout->section_list().end(); | |
8756 | ++p) | |
8757 | { | |
8758 | if ((*p)->type() == elfcpp::SHT_MIPS_REGINFO) | |
8759 | { | |
8760 | Mips_output_section_reginfo<size, big_endian>* reginfo = | |
8761 | Mips_output_section_reginfo<size, big_endian>:: | |
8762 | as_mips_output_section_reginfo(*p); | |
8763 | ||
8764 | reginfo->set_masks(gprmask, cprmask1, cprmask2, cprmask3, cprmask4); | |
8765 | ||
8766 | if (!parameters->options().relocatable()) | |
8767 | { | |
8768 | Output_segment* reginfo_segment = | |
8769 | layout->make_output_segment(elfcpp::PT_MIPS_REGINFO, | |
8770 | elfcpp::PF_R); | |
8771 | reginfo_segment->add_output_section_to_nonload(reginfo, | |
8772 | elfcpp::PF_R); | |
8773 | } | |
8774 | } | |
8775 | } | |
8776 | ||
8777 | // Fill in some more dynamic tags. | |
8778 | // TODO(sasa): Add more dynamic tags. | |
8779 | const Reloc_section* rel_plt = (this->plt_ == NULL | |
8780 | ? NULL : this->plt_->rel_plt()); | |
8781 | layout->add_target_dynamic_tags(true, this->got_, rel_plt, | |
8782 | this->rel_dyn_, true, false); | |
8783 | ||
8784 | Output_data_dynamic* const odyn = layout->dynamic_data(); | |
8785 | if (odyn != NULL | |
8786 | && !parameters->options().relocatable() | |
8787 | && !parameters->doing_static_link()) | |
8788 | { | |
8789 | unsigned int d_val; | |
8790 | // This element holds a 32-bit version id for the Runtime | |
8791 | // Linker Interface. This will start at integer value 1. | |
8792 | d_val = 0x01; | |
8793 | odyn->add_constant(elfcpp::DT_MIPS_RLD_VERSION, d_val); | |
8794 | ||
8795 | // Dynamic flags | |
8796 | d_val = elfcpp::RHF_NOTPOT; | |
8797 | odyn->add_constant(elfcpp::DT_MIPS_FLAGS, d_val); | |
8798 | ||
8799 | // Save layout for using when emiting custom dynamic tags. | |
8800 | this->layout_ = layout; | |
8801 | ||
8802 | // This member holds the base address of the segment. | |
8803 | odyn->add_custom(elfcpp::DT_MIPS_BASE_ADDRESS); | |
8804 | ||
8805 | // This member holds the number of entries in the .dynsym section. | |
8806 | odyn->add_custom(elfcpp::DT_MIPS_SYMTABNO); | |
8807 | ||
8808 | // This member holds the index of the first dynamic symbol | |
8809 | // table entry that corresponds to an entry in the global offset table. | |
8810 | odyn->add_custom(elfcpp::DT_MIPS_GOTSYM); | |
8811 | ||
8812 | // This member holds the number of local GOT entries. | |
8813 | odyn->add_constant(elfcpp::DT_MIPS_LOCAL_GOTNO, | |
8814 | this->got_->get_local_gotno()); | |
8815 | ||
8816 | if (this->plt_ != NULL) | |
8817 | // DT_MIPS_PLTGOT dynamic tag | |
8818 | odyn->add_section_address(elfcpp::DT_MIPS_PLTGOT, this->got_plt_); | |
8819 | } | |
8820 | } | |
8821 | ||
8822 | // Get the custom dynamic tag value. | |
8823 | template<int size, bool big_endian> | |
8824 | unsigned int | |
8825 | Target_mips<size, big_endian>::do_dynamic_tag_custom_value(elfcpp::DT tag) const | |
8826 | { | |
8827 | switch (tag) | |
8828 | { | |
8829 | case elfcpp::DT_MIPS_BASE_ADDRESS: | |
8830 | { | |
8831 | // The base address of the segment. | |
8832 | // At this point, the segment list has been sorted into final order, | |
8833 | // so just return vaddr of the first readable PT_LOAD segment. | |
8834 | Output_segment* seg = | |
8835 | this->layout_->find_output_segment(elfcpp::PT_LOAD, elfcpp::PF_R, 0); | |
8836 | gold_assert(seg != NULL); | |
8837 | return seg->vaddr(); | |
8838 | } | |
8839 | ||
8840 | case elfcpp::DT_MIPS_SYMTABNO: | |
8841 | // The number of entries in the .dynsym section. | |
8842 | return this->get_dt_mips_symtabno(); | |
8843 | ||
8844 | case elfcpp::DT_MIPS_GOTSYM: | |
8845 | { | |
8846 | // The index of the first dynamic symbol table entry that corresponds | |
8847 | // to an entry in the GOT. | |
8848 | if (this->got_->first_global_got_dynsym_index() != -1U) | |
8849 | return this->got_->first_global_got_dynsym_index(); | |
8850 | else | |
8851 | // In case if we don't have global GOT symbols we default to setting | |
8852 | // DT_MIPS_GOTSYM to the same value as DT_MIPS_SYMTABNO. | |
8853 | return this->get_dt_mips_symtabno(); | |
8854 | } | |
8855 | ||
8856 | default: | |
8857 | gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag); | |
8858 | } | |
8859 | ||
8860 | return (unsigned int)-1; | |
8861 | } | |
8862 | ||
8863 | // Relocate section data. | |
8864 | ||
8865 | template<int size, bool big_endian> | |
8866 | void | |
8867 | Target_mips<size, big_endian>::relocate_section( | |
8868 | const Relocate_info<size, big_endian>* relinfo, | |
8869 | unsigned int sh_type, | |
8870 | const unsigned char* prelocs, | |
8871 | size_t reloc_count, | |
8872 | Output_section* output_section, | |
8873 | bool needs_special_offset_handling, | |
8874 | unsigned char* view, | |
8875 | Mips_address address, | |
8876 | section_size_type view_size, | |
8877 | const Reloc_symbol_changes* reloc_symbol_changes) | |
8878 | { | |
8879 | typedef Target_mips<size, big_endian> Mips; | |
8880 | typedef typename Target_mips<size, big_endian>::Relocate Mips_relocate; | |
8881 | ||
8882 | if (sh_type == elfcpp::SHT_REL) | |
4d625b70 CC |
8883 | { |
8884 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
8885 | Classify_reloc; | |
8886 | ||
8887 | gold::relocate_section<size, big_endian, Mips, Mips_relocate, | |
8888 | gold::Default_comdat_behavior, Classify_reloc>( | |
8889 | relinfo, | |
8890 | this, | |
8891 | prelocs, | |
8892 | reloc_count, | |
8893 | output_section, | |
8894 | needs_special_offset_handling, | |
8895 | view, | |
8896 | address, | |
8897 | view_size, | |
8898 | reloc_symbol_changes); | |
8899 | } | |
9810d34d | 8900 | else if (sh_type == elfcpp::SHT_RELA) |
4d625b70 CC |
8901 | { |
8902 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
8903 | Classify_reloc; | |
8904 | ||
8905 | gold::relocate_section<size, big_endian, Mips, Mips_relocate, | |
8906 | gold::Default_comdat_behavior, Classify_reloc>( | |
8907 | relinfo, | |
8908 | this, | |
8909 | prelocs, | |
8910 | reloc_count, | |
8911 | output_section, | |
8912 | needs_special_offset_handling, | |
8913 | view, | |
8914 | address, | |
8915 | view_size, | |
8916 | reloc_symbol_changes); | |
8917 | } | |
9810d34d SS |
8918 | } |
8919 | ||
8920 | // Return the size of a relocation while scanning during a relocatable | |
8921 | // link. | |
8922 | ||
9810d34d | 8923 | unsigned int |
4d625b70 | 8924 | mips_get_size_for_reloc(unsigned int r_type, Relobj* object) |
9810d34d SS |
8925 | { |
8926 | switch (r_type) | |
8927 | { | |
8928 | case elfcpp::R_MIPS_NONE: | |
8929 | case elfcpp::R_MIPS_TLS_DTPMOD64: | |
8930 | case elfcpp::R_MIPS_TLS_DTPREL64: | |
8931 | case elfcpp::R_MIPS_TLS_TPREL64: | |
8932 | return 0; | |
8933 | ||
8934 | case elfcpp::R_MIPS_32: | |
8935 | case elfcpp::R_MIPS_TLS_DTPMOD32: | |
8936 | case elfcpp::R_MIPS_TLS_DTPREL32: | |
8937 | case elfcpp::R_MIPS_TLS_TPREL32: | |
8938 | case elfcpp::R_MIPS_REL32: | |
8939 | case elfcpp::R_MIPS_PC32: | |
8940 | case elfcpp::R_MIPS_GPREL32: | |
8941 | case elfcpp::R_MIPS_JALR: | |
47a9f4fc | 8942 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
8943 | return 4; |
8944 | ||
8945 | case elfcpp::R_MIPS_16: | |
8946 | case elfcpp::R_MIPS_HI16: | |
8947 | case elfcpp::R_MIPS_LO16: | |
8948 | case elfcpp::R_MIPS_GPREL16: | |
8949 | case elfcpp::R_MIPS16_HI16: | |
8950 | case elfcpp::R_MIPS16_LO16: | |
8951 | case elfcpp::R_MIPS_PC16: | |
8952 | case elfcpp::R_MIPS_GOT16: | |
8953 | case elfcpp::R_MIPS16_GOT16: | |
8954 | case elfcpp::R_MIPS_CALL16: | |
8955 | case elfcpp::R_MIPS16_CALL16: | |
8956 | case elfcpp::R_MIPS_GOT_HI16: | |
8957 | case elfcpp::R_MIPS_CALL_HI16: | |
8958 | case elfcpp::R_MIPS_GOT_LO16: | |
8959 | case elfcpp::R_MIPS_CALL_LO16: | |
8960 | case elfcpp::R_MIPS_TLS_DTPREL_HI16: | |
8961 | case elfcpp::R_MIPS_TLS_DTPREL_LO16: | |
8962 | case elfcpp::R_MIPS_TLS_TPREL_HI16: | |
8963 | case elfcpp::R_MIPS_TLS_TPREL_LO16: | |
8964 | case elfcpp::R_MIPS16_GPREL: | |
8965 | case elfcpp::R_MIPS_GOT_DISP: | |
8966 | case elfcpp::R_MIPS_LITERAL: | |
8967 | case elfcpp::R_MIPS_GOT_PAGE: | |
8968 | case elfcpp::R_MIPS_GOT_OFST: | |
8969 | case elfcpp::R_MIPS_TLS_GD: | |
8970 | case elfcpp::R_MIPS_TLS_LDM: | |
8971 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
8972 | return 2; | |
8973 | ||
8974 | // These relocations are not byte sized | |
8975 | case elfcpp::R_MIPS_26: | |
8976 | case elfcpp::R_MIPS16_26: | |
8977 | return 4; | |
8978 | ||
8979 | case elfcpp::R_MIPS_COPY: | |
8980 | case elfcpp::R_MIPS_JUMP_SLOT: | |
8981 | object->error(_("unexpected reloc %u in object file"), r_type); | |
8982 | return 0; | |
8983 | ||
8984 | default: | |
8985 | object->error(_("unsupported reloc %u in object file"), r_type); | |
8986 | return 0; | |
8987 | } | |
8988 | } | |
8989 | ||
8990 | // Scan the relocs during a relocatable link. | |
8991 | ||
8992 | template<int size, bool big_endian> | |
8993 | void | |
8994 | Target_mips<size, big_endian>::scan_relocatable_relocs( | |
8995 | Symbol_table* symtab, | |
8996 | Layout* layout, | |
8997 | Sized_relobj_file<size, big_endian>* object, | |
8998 | unsigned int data_shndx, | |
8999 | unsigned int sh_type, | |
9000 | const unsigned char* prelocs, | |
9001 | size_t reloc_count, | |
9002 | Output_section* output_section, | |
9003 | bool needs_special_offset_handling, | |
9004 | size_t local_symbol_count, | |
9005 | const unsigned char* plocal_symbols, | |
9006 | Relocatable_relocs* rr) | |
9007 | { | |
47a9f4fc VR |
9008 | if (sh_type == elfcpp::SHT_REL) |
9009 | { | |
9010 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
9011 | Classify_reloc; | |
9012 | typedef Mips_scan_relocatable_relocs<big_endian, Classify_reloc> | |
9013 | Scan_relocatable_relocs; | |
9014 | ||
9015 | gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>( | |
9016 | symtab, | |
9017 | layout, | |
9018 | object, | |
9019 | data_shndx, | |
9020 | prelocs, | |
9021 | reloc_count, | |
9022 | output_section, | |
9023 | needs_special_offset_handling, | |
9024 | local_symbol_count, | |
9025 | plocal_symbols, | |
9026 | rr); | |
9027 | } | |
9028 | else if (sh_type == elfcpp::SHT_RELA) | |
9029 | { | |
9030 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
9031 | Classify_reloc; | |
9032 | typedef Mips_scan_relocatable_relocs<big_endian, Classify_reloc> | |
9033 | Scan_relocatable_relocs; | |
9034 | ||
9035 | gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>( | |
9036 | symtab, | |
9037 | layout, | |
9038 | object, | |
9039 | data_shndx, | |
9040 | prelocs, | |
9041 | reloc_count, | |
9042 | output_section, | |
9043 | needs_special_offset_handling, | |
9044 | local_symbol_count, | |
9045 | plocal_symbols, | |
9046 | rr); | |
9047 | } | |
9048 | else | |
9049 | gold_unreachable(); | |
9810d34d SS |
9050 | } |
9051 | ||
4d625b70 CC |
9052 | // Scan the relocs for --emit-relocs. |
9053 | ||
9054 | template<int size, bool big_endian> | |
9055 | void | |
9056 | Target_mips<size, big_endian>::emit_relocs_scan( | |
9057 | Symbol_table* symtab, | |
9058 | Layout* layout, | |
9059 | Sized_relobj_file<size, big_endian>* object, | |
9060 | unsigned int data_shndx, | |
9061 | unsigned int sh_type, | |
9062 | const unsigned char* prelocs, | |
9063 | size_t reloc_count, | |
9064 | Output_section* output_section, | |
9065 | bool needs_special_offset_handling, | |
9066 | size_t local_symbol_count, | |
9067 | const unsigned char* plocal_syms, | |
9068 | Relocatable_relocs* rr) | |
9069 | { | |
47a9f4fc VR |
9070 | if (sh_type == elfcpp::SHT_REL) |
9071 | { | |
9072 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
9073 | Classify_reloc; | |
9074 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
9075 | Emit_relocs_strategy; | |
9076 | ||
9077 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
9078 | symtab, | |
9079 | layout, | |
9080 | object, | |
9081 | data_shndx, | |
9082 | prelocs, | |
9083 | reloc_count, | |
9084 | output_section, | |
9085 | needs_special_offset_handling, | |
9086 | local_symbol_count, | |
9087 | plocal_syms, | |
9088 | rr); | |
9089 | } | |
9090 | else if (sh_type == elfcpp::SHT_RELA) | |
9091 | { | |
9092 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
9093 | Classify_reloc; | |
9094 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
9095 | Emit_relocs_strategy; | |
9096 | ||
9097 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
9098 | symtab, | |
9099 | layout, | |
9100 | object, | |
9101 | data_shndx, | |
9102 | prelocs, | |
9103 | reloc_count, | |
9104 | output_section, | |
9105 | needs_special_offset_handling, | |
9106 | local_symbol_count, | |
9107 | plocal_syms, | |
9108 | rr); | |
9109 | } | |
9110 | else | |
9111 | gold_unreachable(); | |
4d625b70 CC |
9112 | } |
9113 | ||
9810d34d SS |
9114 | // Emit relocations for a section. |
9115 | ||
9116 | template<int size, bool big_endian> | |
9117 | void | |
9118 | Target_mips<size, big_endian>::relocate_relocs( | |
9119 | const Relocate_info<size, big_endian>* relinfo, | |
9120 | unsigned int sh_type, | |
9121 | const unsigned char* prelocs, | |
9122 | size_t reloc_count, | |
9123 | Output_section* output_section, | |
9124 | typename elfcpp::Elf_types<size>::Elf_Off | |
9125 | offset_in_output_section, | |
9810d34d SS |
9126 | unsigned char* view, |
9127 | Mips_address view_address, | |
9128 | section_size_type view_size, | |
9129 | unsigned char* reloc_view, | |
9130 | section_size_type reloc_view_size) | |
9131 | { | |
47a9f4fc VR |
9132 | if (sh_type == elfcpp::SHT_REL) |
9133 | { | |
9134 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
9135 | Classify_reloc; | |
9136 | ||
9137 | gold::relocate_relocs<size, big_endian, Classify_reloc>( | |
9138 | relinfo, | |
9139 | prelocs, | |
9140 | reloc_count, | |
9141 | output_section, | |
9142 | offset_in_output_section, | |
9143 | view, | |
9144 | view_address, | |
9145 | view_size, | |
9146 | reloc_view, | |
9147 | reloc_view_size); | |
9148 | } | |
9149 | else if (sh_type == elfcpp::SHT_RELA) | |
9150 | { | |
9151 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
9152 | Classify_reloc; | |
9153 | ||
9154 | gold::relocate_relocs<size, big_endian, Classify_reloc>( | |
9155 | relinfo, | |
9156 | prelocs, | |
9157 | reloc_count, | |
9158 | output_section, | |
9159 | offset_in_output_section, | |
9160 | view, | |
9161 | view_address, | |
9162 | view_size, | |
9163 | reloc_view, | |
9164 | reloc_view_size); | |
9165 | } | |
9166 | else | |
9167 | gold_unreachable(); | |
9810d34d SS |
9168 | } |
9169 | ||
9170 | // Perform target-specific processing in a relocatable link. This is | |
9171 | // only used if we use the relocation strategy RELOC_SPECIAL. | |
9172 | ||
9173 | template<int size, bool big_endian> | |
9174 | void | |
9175 | Target_mips<size, big_endian>::relocate_special_relocatable( | |
9176 | const Relocate_info<size, big_endian>* relinfo, | |
9177 | unsigned int sh_type, | |
9178 | const unsigned char* preloc_in, | |
9179 | size_t relnum, | |
9180 | Output_section* output_section, | |
9181 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, | |
9182 | unsigned char* view, | |
9183 | Mips_address view_address, | |
9184 | section_size_type, | |
9185 | unsigned char* preloc_out) | |
9186 | { | |
9187 | // We can only handle REL type relocation sections. | |
9188 | gold_assert(sh_type == elfcpp::SHT_REL); | |
9189 | ||
9190 | typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc | |
9191 | Reltype; | |
9192 | typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc_write | |
9193 | Reltype_write; | |
9194 | ||
9195 | typedef Mips_relocate_functions<size, big_endian> Reloc_funcs; | |
9196 | ||
9197 | const Mips_address invalid_address = static_cast<Mips_address>(0) - 1; | |
9198 | ||
9199 | Mips_relobj<size, big_endian>* object = | |
9200 | Mips_relobj<size, big_endian>::as_mips_relobj(relinfo->object); | |
9201 | const unsigned int local_count = object->local_symbol_count(); | |
9202 | ||
9203 | Reltype reloc(preloc_in); | |
9204 | Reltype_write reloc_write(preloc_out); | |
9205 | ||
9206 | elfcpp::Elf_types<32>::Elf_WXword r_info = reloc.get_r_info(); | |
9207 | const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
9208 | const unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
9209 | ||
9210 | // Get the new symbol index. | |
9211 | // We only use RELOC_SPECIAL strategy in local relocations. | |
9212 | gold_assert(r_sym < local_count); | |
9213 | ||
9214 | // We are adjusting a section symbol. We need to find | |
9215 | // the symbol table index of the section symbol for | |
9216 | // the output section corresponding to input section | |
9217 | // in which this symbol is defined. | |
9218 | bool is_ordinary; | |
9219 | unsigned int shndx = object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
9220 | gold_assert(is_ordinary); | |
9221 | Output_section* os = object->output_section(shndx); | |
9222 | gold_assert(os != NULL); | |
9223 | gold_assert(os->needs_symtab_index()); | |
9224 | unsigned int new_symndx = os->symtab_index(); | |
9225 | ||
9226 | // Get the new offset--the location in the output section where | |
9227 | // this relocation should be applied. | |
9228 | ||
9229 | Mips_address offset = reloc.get_r_offset(); | |
9230 | Mips_address new_offset; | |
9231 | if (offset_in_output_section != invalid_address) | |
9232 | new_offset = offset + offset_in_output_section; | |
9233 | else | |
9234 | { | |
9235 | section_offset_type sot_offset = | |
9236 | convert_types<section_offset_type, Mips_address>(offset); | |
9237 | section_offset_type new_sot_offset = | |
9238 | output_section->output_offset(object, relinfo->data_shndx, | |
9239 | sot_offset); | |
9240 | gold_assert(new_sot_offset != -1); | |
9241 | new_offset = new_sot_offset; | |
9242 | } | |
9243 | ||
9244 | // In an object file, r_offset is an offset within the section. | |
9245 | // In an executable or dynamic object, generated by | |
9246 | // --emit-relocs, r_offset is an absolute address. | |
9247 | if (!parameters->options().relocatable()) | |
9248 | { | |
9249 | new_offset += view_address; | |
9250 | if (offset_in_output_section != invalid_address) | |
9251 | new_offset -= offset_in_output_section; | |
9252 | } | |
9253 | ||
9254 | reloc_write.put_r_offset(new_offset); | |
9255 | reloc_write.put_r_info(elfcpp::elf_r_info<32>(new_symndx, r_type)); | |
9256 | ||
9257 | // Handle the reloc addend. | |
9258 | // The relocation uses a section symbol in the input file. | |
9259 | // We are adjusting it to use a section symbol in the output | |
9260 | // file. The input section symbol refers to some address in | |
9261 | // the input section. We need the relocation in the output | |
9262 | // file to refer to that same address. This adjustment to | |
9263 | // the addend is the same calculation we use for a simple | |
9264 | // absolute relocation for the input section symbol. | |
47a9f4fc | 9265 | Valtype calculated_value = 0; |
9810d34d SS |
9266 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); |
9267 | ||
9268 | unsigned char* paddend = view + offset; | |
9269 | typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY; | |
9270 | switch (r_type) | |
9271 | { | |
9272 | case elfcpp::R_MIPS_26: | |
9273 | reloc_status = Reloc_funcs::rel26(paddend, object, psymval, | |
9274 | offset_in_output_section, true, 0, sh_type == elfcpp::SHT_REL, NULL, | |
47a9f4fc VR |
9275 | false /*TODO(sasa): cross mode jump*/, r_type, this->jal_to_bal(), |
9276 | false, &calculated_value); | |
9810d34d SS |
9277 | break; |
9278 | ||
9279 | default: | |
9280 | gold_unreachable(); | |
9281 | } | |
9282 | ||
9283 | // Report any errors. | |
9284 | switch (reloc_status) | |
9285 | { | |
9286 | case Reloc_funcs::STATUS_OKAY: | |
9287 | break; | |
9288 | case Reloc_funcs::STATUS_OVERFLOW: | |
9289 | gold_error_at_location(relinfo, relnum, reloc.get_r_offset(), | |
9290 | _("relocation overflow")); | |
9291 | break; | |
9292 | case Reloc_funcs::STATUS_BAD_RELOC: | |
9293 | gold_error_at_location(relinfo, relnum, reloc.get_r_offset(), | |
9294 | _("unexpected opcode while processing relocation")); | |
9295 | break; | |
9296 | default: | |
9297 | gold_unreachable(); | |
9298 | } | |
9299 | } | |
9300 | ||
9301 | // Optimize the TLS relocation type based on what we know about the | |
9302 | // symbol. IS_FINAL is true if the final address of this symbol is | |
9303 | // known at link time. | |
9304 | ||
9305 | template<int size, bool big_endian> | |
9306 | tls::Tls_optimization | |
9307 | Target_mips<size, big_endian>::optimize_tls_reloc(bool, int) | |
9308 | { | |
9309 | // FIXME: Currently we do not do any TLS optimization. | |
9310 | return tls::TLSOPT_NONE; | |
9311 | } | |
9312 | ||
9313 | // Scan a relocation for a local symbol. | |
9314 | ||
9315 | template<int size, bool big_endian> | |
9316 | inline void | |
9317 | Target_mips<size, big_endian>::Scan::local( | |
9318 | Symbol_table* symtab, | |
9319 | Layout* layout, | |
9320 | Target_mips<size, big_endian>* target, | |
9321 | Sized_relobj_file<size, big_endian>* object, | |
9322 | unsigned int data_shndx, | |
9323 | Output_section* output_section, | |
4d625b70 CC |
9324 | const Relatype* rela, |
9325 | const Reltype* rel, | |
9810d34d SS |
9326 | unsigned int rel_type, |
9327 | unsigned int r_type, | |
9328 | const elfcpp::Sym<size, big_endian>& lsym, | |
9329 | bool is_discarded) | |
9330 | { | |
9331 | if (is_discarded) | |
9332 | return; | |
9333 | ||
9334 | Mips_address r_offset; | |
4d625b70 | 9335 | unsigned int r_sym; |
9810d34d SS |
9336 | typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
9337 | ||
9338 | if (rel_type == elfcpp::SHT_RELA) | |
9339 | { | |
9340 | r_offset = rela->get_r_offset(); | |
4d625b70 CC |
9341 | r_sym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: |
9342 | get_r_sym(rela); | |
9810d34d SS |
9343 | r_addend = rela->get_r_addend(); |
9344 | } | |
9345 | else | |
9346 | { | |
9347 | r_offset = rel->get_r_offset(); | |
4d625b70 CC |
9348 | r_sym = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: |
9349 | get_r_sym(rel); | |
9810d34d SS |
9350 | r_addend = 0; |
9351 | } | |
9352 | ||
9810d34d SS |
9353 | Mips_relobj<size, big_endian>* mips_obj = |
9354 | Mips_relobj<size, big_endian>::as_mips_relobj(object); | |
9355 | ||
9356 | if (mips_obj->is_mips16_stub_section(data_shndx)) | |
9357 | { | |
9358 | mips_obj->get_mips16_stub_section(data_shndx) | |
9359 | ->new_local_reloc_found(r_type, r_sym); | |
9360 | } | |
9361 | ||
9362 | if (r_type == elfcpp::R_MIPS_NONE) | |
9363 | // R_MIPS_NONE is used in mips16 stub sections, to define the target of the | |
9364 | // mips16 stub. | |
9365 | return; | |
9366 | ||
9367 | if (!mips16_call_reloc(r_type) | |
9368 | && !mips_obj->section_allows_mips16_refs(data_shndx)) | |
9369 | // This reloc would need to refer to a MIPS16 hard-float stub, if | |
9370 | // there is one. We ignore MIPS16 stub sections and .pdr section when | |
9371 | // looking for relocs that would need to refer to MIPS16 stubs. | |
9372 | mips_obj->add_local_non_16bit_call(r_sym); | |
9373 | ||
9374 | if (r_type == elfcpp::R_MIPS16_26 | |
9375 | && !mips_obj->section_allows_mips16_refs(data_shndx)) | |
9376 | mips_obj->add_local_16bit_call(r_sym); | |
9377 | ||
9378 | switch (r_type) | |
9379 | { | |
9380 | case elfcpp::R_MIPS_GOT16: | |
9381 | case elfcpp::R_MIPS_CALL16: | |
9382 | case elfcpp::R_MIPS_CALL_HI16: | |
9383 | case elfcpp::R_MIPS_CALL_LO16: | |
9384 | case elfcpp::R_MIPS_GOT_HI16: | |
9385 | case elfcpp::R_MIPS_GOT_LO16: | |
9386 | case elfcpp::R_MIPS_GOT_PAGE: | |
9387 | case elfcpp::R_MIPS_GOT_OFST: | |
9388 | case elfcpp::R_MIPS_GOT_DISP: | |
9389 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
9390 | case elfcpp::R_MIPS_TLS_GD: | |
9391 | case elfcpp::R_MIPS_TLS_LDM: | |
9392 | case elfcpp::R_MIPS16_GOT16: | |
9393 | case elfcpp::R_MIPS16_CALL16: | |
9394 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
9395 | case elfcpp::R_MIPS16_TLS_GD: | |
9396 | case elfcpp::R_MIPS16_TLS_LDM: | |
9397 | case elfcpp::R_MICROMIPS_GOT16: | |
9398 | case elfcpp::R_MICROMIPS_CALL16: | |
9399 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
9400 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
9401 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
9402 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
9403 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
9404 | case elfcpp::R_MICROMIPS_GOT_OFST: | |
9405 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
9406 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
9407 | case elfcpp::R_MICROMIPS_TLS_GD: | |
9408 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
47a9f4fc | 9409 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
9410 | // We need a GOT section. |
9411 | target->got_section(symtab, layout); | |
9412 | break; | |
9413 | ||
9414 | default: | |
9415 | break; | |
9416 | } | |
9417 | ||
9418 | if (call_lo16_reloc(r_type) | |
9419 | || got_lo16_reloc(r_type) | |
47a9f4fc VR |
9420 | || got_disp_reloc(r_type) |
9421 | || eh_reloc(r_type)) | |
9810d34d SS |
9422 | { |
9423 | // We may need a local GOT entry for this relocation. We | |
9424 | // don't count R_MIPS_GOT_PAGE because we can estimate the | |
9425 | // maximum number of pages needed by looking at the size of | |
9426 | // the segment. Similar comments apply to R_MIPS*_GOT16 and | |
9427 | // R_MIPS*_CALL16. We don't count R_MIPS_GOT_HI16, or | |
9428 | // R_MIPS_CALL_HI16 because these are always followed by an | |
9429 | // R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16. | |
9430 | Mips_output_data_got<size, big_endian>* got = | |
9431 | target->got_section(symtab, layout); | |
47a9f4fc VR |
9432 | bool is_section_symbol = lsym.get_st_type() == elfcpp::STT_SECTION; |
9433 | got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type, -1U, | |
9434 | is_section_symbol); | |
9810d34d SS |
9435 | } |
9436 | ||
9437 | switch (r_type) | |
9438 | { | |
9439 | case elfcpp::R_MIPS_CALL16: | |
9440 | case elfcpp::R_MIPS16_CALL16: | |
9441 | case elfcpp::R_MICROMIPS_CALL16: | |
9442 | gold_error(_("CALL16 reloc at 0x%lx not against global symbol "), | |
9443 | (unsigned long)r_offset); | |
9444 | return; | |
9445 | ||
9446 | case elfcpp::R_MIPS_GOT_PAGE: | |
9447 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
9448 | case elfcpp::R_MIPS16_GOT16: | |
9449 | case elfcpp::R_MIPS_GOT16: | |
9450 | case elfcpp::R_MIPS_GOT_HI16: | |
9451 | case elfcpp::R_MIPS_GOT_LO16: | |
9452 | case elfcpp::R_MICROMIPS_GOT16: | |
9453 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
9454 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
9455 | { | |
9456 | // This relocation needs a page entry in the GOT. | |
9457 | // Get the section contents. | |
9458 | section_size_type view_size = 0; | |
9459 | const unsigned char* view = object->section_contents(data_shndx, | |
9460 | &view_size, false); | |
9461 | view += r_offset; | |
9462 | ||
9463 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
9464 | Valtype32 addend = (rel_type == elfcpp::SHT_REL ? val & 0xffff | |
9465 | : r_addend); | |
9466 | ||
9467 | if (rel_type == elfcpp::SHT_REL && got16_reloc(r_type)) | |
9468 | target->got16_addends_.push_back(got16_addend<size, big_endian>( | |
9469 | object, data_shndx, r_type, r_sym, addend)); | |
9470 | else | |
9471 | target->got_section()->record_got_page_entry(mips_obj, r_sym, addend); | |
9472 | break; | |
9473 | } | |
9474 | ||
9475 | case elfcpp::R_MIPS_HI16: | |
9476 | case elfcpp::R_MIPS16_HI16: | |
9477 | case elfcpp::R_MICROMIPS_HI16: | |
9478 | // Record the reloc so that we can check whether the corresponding LO16 | |
9479 | // part exists. | |
9480 | if (rel_type == elfcpp::SHT_REL) | |
9481 | target->got16_addends_.push_back(got16_addend<size, big_endian>( | |
9482 | object, data_shndx, r_type, r_sym, 0)); | |
9483 | break; | |
9484 | ||
9485 | case elfcpp::R_MIPS_LO16: | |
9486 | case elfcpp::R_MIPS16_LO16: | |
9487 | case elfcpp::R_MICROMIPS_LO16: | |
9488 | { | |
9489 | if (rel_type != elfcpp::SHT_REL) | |
9490 | break; | |
9491 | ||
9492 | // Find corresponding GOT16/HI16 relocation. | |
9493 | ||
9494 | // According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must | |
9495 | // be immediately following. However, for the IRIX6 ABI, the next | |
9496 | // relocation may be a composed relocation consisting of several | |
9497 | // relocations for the same address. In that case, the R_MIPS_LO16 | |
9498 | // relocation may occur as one of these. We permit a similar | |
9499 | // extension in general, as that is useful for GCC. | |
9500 | ||
9501 | // In some cases GCC dead code elimination removes the LO16 but | |
9502 | // keeps the corresponding HI16. This is strictly speaking a | |
9503 | // violation of the ABI but not immediately harmful. | |
9504 | ||
9505 | typename std::list<got16_addend<size, big_endian> >::iterator it = | |
9506 | target->got16_addends_.begin(); | |
9507 | while (it != target->got16_addends_.end()) | |
9508 | { | |
9509 | got16_addend<size, big_endian> _got16_addend = *it; | |
9510 | ||
9511 | // TODO(sasa): Split got16_addends_ list into two lists - one for | |
9512 | // GOT16 relocs and the other for HI16 relocs. | |
9513 | ||
9514 | // Report an error if we find HI16 or GOT16 reloc from the | |
9515 | // previous section without the matching LO16 part. | |
9516 | if (_got16_addend.object != object | |
9517 | || _got16_addend.shndx != data_shndx) | |
9518 | { | |
9519 | gold_error("Can't find matching LO16 reloc"); | |
9520 | break; | |
9521 | } | |
9522 | ||
9523 | if (_got16_addend.r_sym != r_sym | |
9524 | || !is_matching_lo16_reloc(_got16_addend.r_type, r_type)) | |
9525 | { | |
9526 | ++it; | |
9527 | continue; | |
9528 | } | |
9529 | ||
9530 | // We found a matching HI16 or GOT16 reloc for this LO16 reloc. | |
9531 | // For GOT16, we need to calculate combined addend and record GOT page | |
9532 | // entry. | |
9533 | if (got16_reloc(_got16_addend.r_type)) | |
9534 | { | |
9535 | ||
9536 | section_size_type view_size = 0; | |
9537 | const unsigned char* view = object->section_contents(data_shndx, | |
9538 | &view_size, | |
9539 | false); | |
9540 | view += r_offset; | |
9541 | ||
9542 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
9543 | int32_t addend = Bits<16>::sign_extend32(val & 0xffff); | |
9544 | ||
9545 | addend = (_got16_addend.addend << 16) + addend; | |
9546 | target->got_section()->record_got_page_entry(mips_obj, r_sym, | |
9547 | addend); | |
9548 | } | |
9549 | ||
9550 | it = target->got16_addends_.erase(it); | |
9551 | } | |
9552 | break; | |
9553 | } | |
9554 | } | |
9555 | ||
9556 | switch (r_type) | |
9557 | { | |
9558 | case elfcpp::R_MIPS_32: | |
9559 | case elfcpp::R_MIPS_REL32: | |
9560 | case elfcpp::R_MIPS_64: | |
9561 | { | |
9562 | if (parameters->options().output_is_position_independent()) | |
9563 | { | |
9564 | // If building a shared library (or a position-independent | |
9565 | // executable), we need to create a dynamic relocation for | |
9566 | // this location. | |
47a9f4fc VR |
9567 | if (is_readonly_section(output_section)) |
9568 | break; | |
9810d34d | 9569 | Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
9810d34d SS |
9570 | rel_dyn->add_symbolless_local_addend(object, r_sym, |
9571 | elfcpp::R_MIPS_REL32, | |
9572 | output_section, data_shndx, | |
9573 | r_offset); | |
9574 | } | |
9575 | break; | |
9576 | } | |
9577 | ||
9578 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
9579 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
9580 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
9581 | case elfcpp::R_MIPS_TLS_LDM: | |
9582 | case elfcpp::R_MIPS16_TLS_LDM: | |
9583 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
9584 | case elfcpp::R_MIPS_TLS_GD: | |
9585 | case elfcpp::R_MIPS16_TLS_GD: | |
9586 | case elfcpp::R_MICROMIPS_TLS_GD: | |
9587 | { | |
9810d34d SS |
9588 | bool output_is_shared = parameters->options().shared(); |
9589 | const tls::Tls_optimization optimized_type | |
9590 | = Target_mips<size, big_endian>::optimize_tls_reloc( | |
9591 | !output_is_shared, r_type); | |
9592 | switch (r_type) | |
9593 | { | |
9594 | case elfcpp::R_MIPS_TLS_GD: | |
9595 | case elfcpp::R_MIPS16_TLS_GD: | |
9596 | case elfcpp::R_MICROMIPS_TLS_GD: | |
9597 | if (optimized_type == tls::TLSOPT_NONE) | |
9598 | { | |
9599 | // Create a pair of GOT entries for the module index and | |
9600 | // dtv-relative offset. | |
9601 | Mips_output_data_got<size, big_endian>* got = | |
9602 | target->got_section(symtab, layout); | |
9603 | unsigned int shndx = lsym.get_st_shndx(); | |
9604 | bool is_ordinary; | |
9605 | shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
9606 | if (!is_ordinary) | |
9607 | { | |
9608 | object->error(_("local symbol %u has bad shndx %u"), | |
9609 | r_sym, shndx); | |
9610 | break; | |
9611 | } | |
9612 | got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type, | |
47a9f4fc | 9613 | shndx, false); |
9810d34d SS |
9614 | } |
9615 | else | |
9616 | { | |
9617 | // FIXME: TLS optimization not supported yet. | |
9618 | gold_unreachable(); | |
9619 | } | |
9620 | break; | |
9621 | ||
9622 | case elfcpp::R_MIPS_TLS_LDM: | |
9623 | case elfcpp::R_MIPS16_TLS_LDM: | |
9624 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
9625 | if (optimized_type == tls::TLSOPT_NONE) | |
9626 | { | |
9627 | // We always record LDM symbols as local with index 0. | |
9628 | target->got_section()->record_local_got_symbol(mips_obj, 0, | |
9629 | r_addend, r_type, | |
47a9f4fc | 9630 | -1U, false); |
9810d34d SS |
9631 | } |
9632 | else | |
9633 | { | |
9634 | // FIXME: TLS optimization not supported yet. | |
9635 | gold_unreachable(); | |
9636 | } | |
9637 | break; | |
9638 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
9639 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
9640 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
9641 | layout->set_has_static_tls(); | |
9642 | if (optimized_type == tls::TLSOPT_NONE) | |
9643 | { | |
9644 | // Create a GOT entry for the tp-relative offset. | |
9645 | Mips_output_data_got<size, big_endian>* got = | |
9646 | target->got_section(symtab, layout); | |
9647 | got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type, | |
47a9f4fc | 9648 | -1U, false); |
9810d34d SS |
9649 | } |
9650 | else | |
9651 | { | |
9652 | // FIXME: TLS optimization not supported yet. | |
9653 | gold_unreachable(); | |
9654 | } | |
9655 | break; | |
9656 | ||
9657 | default: | |
9658 | gold_unreachable(); | |
9659 | } | |
9660 | } | |
9661 | break; | |
9662 | ||
9663 | default: | |
9664 | break; | |
9665 | } | |
9666 | ||
9667 | // Refuse some position-dependent relocations when creating a | |
9668 | // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're | |
9669 | // not PIC, but we can create dynamic relocations and the result | |
9670 | // will be fine. Also do not refuse R_MIPS_LO16, which can be | |
9671 | // combined with R_MIPS_GOT16. | |
9672 | if (parameters->options().shared()) | |
9673 | { | |
9674 | switch (r_type) | |
9675 | { | |
9676 | case elfcpp::R_MIPS16_HI16: | |
9677 | case elfcpp::R_MIPS_HI16: | |
9678 | case elfcpp::R_MICROMIPS_HI16: | |
9679 | // Don't refuse a high part relocation if it's against | |
9680 | // no symbol (e.g. part of a compound relocation). | |
9681 | if (r_sym == 0) | |
9682 | break; | |
9683 | ||
9684 | // FALLTHROUGH | |
9685 | ||
9686 | case elfcpp::R_MIPS16_26: | |
9687 | case elfcpp::R_MIPS_26: | |
9688 | case elfcpp::R_MICROMIPS_26_S1: | |
9689 | gold_error(_("%s: relocation %u against `%s' can not be used when " | |
9690 | "making a shared object; recompile with -fPIC"), | |
9691 | object->name().c_str(), r_type, "a local symbol"); | |
9692 | default: | |
9693 | break; | |
9694 | } | |
9695 | } | |
9696 | } | |
9697 | ||
9698 | template<int size, bool big_endian> | |
9699 | inline void | |
9700 | Target_mips<size, big_endian>::Scan::local( | |
9701 | Symbol_table* symtab, | |
9702 | Layout* layout, | |
9703 | Target_mips<size, big_endian>* target, | |
9704 | Sized_relobj_file<size, big_endian>* object, | |
9705 | unsigned int data_shndx, | |
9706 | Output_section* output_section, | |
4d625b70 | 9707 | const Reltype& reloc, |
9810d34d SS |
9708 | unsigned int r_type, |
9709 | const elfcpp::Sym<size, big_endian>& lsym, | |
9710 | bool is_discarded) | |
9711 | { | |
9712 | if (is_discarded) | |
9713 | return; | |
9714 | ||
9715 | local( | |
9716 | symtab, | |
9717 | layout, | |
9718 | target, | |
9719 | object, | |
9720 | data_shndx, | |
9721 | output_section, | |
4d625b70 | 9722 | (const Relatype*) NULL, |
9810d34d SS |
9723 | &reloc, |
9724 | elfcpp::SHT_REL, | |
9725 | r_type, | |
9726 | lsym, is_discarded); | |
9727 | } | |
9728 | ||
9729 | ||
9730 | template<int size, bool big_endian> | |
9731 | inline void | |
9732 | Target_mips<size, big_endian>::Scan::local( | |
9733 | Symbol_table* symtab, | |
9734 | Layout* layout, | |
9735 | Target_mips<size, big_endian>* target, | |
9736 | Sized_relobj_file<size, big_endian>* object, | |
9737 | unsigned int data_shndx, | |
9738 | Output_section* output_section, | |
4d625b70 | 9739 | const Relatype& reloc, |
9810d34d SS |
9740 | unsigned int r_type, |
9741 | const elfcpp::Sym<size, big_endian>& lsym, | |
9742 | bool is_discarded) | |
9743 | { | |
9744 | if (is_discarded) | |
9745 | return; | |
9746 | ||
9747 | local( | |
9748 | symtab, | |
9749 | layout, | |
9750 | target, | |
9751 | object, | |
9752 | data_shndx, | |
9753 | output_section, | |
9754 | &reloc, | |
4d625b70 | 9755 | (const Reltype*) NULL, |
9810d34d SS |
9756 | elfcpp::SHT_RELA, |
9757 | r_type, | |
9758 | lsym, is_discarded); | |
9759 | } | |
9760 | ||
9761 | // Scan a relocation for a global symbol. | |
9762 | ||
9763 | template<int size, bool big_endian> | |
9764 | inline void | |
9765 | Target_mips<size, big_endian>::Scan::global( | |
9766 | Symbol_table* symtab, | |
9767 | Layout* layout, | |
9768 | Target_mips<size, big_endian>* target, | |
9769 | Sized_relobj_file<size, big_endian>* object, | |
9770 | unsigned int data_shndx, | |
9771 | Output_section* output_section, | |
4d625b70 CC |
9772 | const Relatype* rela, |
9773 | const Reltype* rel, | |
9810d34d SS |
9774 | unsigned int rel_type, |
9775 | unsigned int r_type, | |
9776 | Symbol* gsym) | |
9777 | { | |
9778 | Mips_address r_offset; | |
4d625b70 | 9779 | unsigned int r_sym; |
9810d34d SS |
9780 | typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
9781 | ||
9782 | if (rel_type == elfcpp::SHT_RELA) | |
9783 | { | |
9784 | r_offset = rela->get_r_offset(); | |
4d625b70 CC |
9785 | r_sym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: |
9786 | get_r_sym(rela); | |
9810d34d SS |
9787 | r_addend = rela->get_r_addend(); |
9788 | } | |
9789 | else | |
9790 | { | |
9791 | r_offset = rel->get_r_offset(); | |
4d625b70 CC |
9792 | r_sym = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: |
9793 | get_r_sym(rel); | |
9810d34d SS |
9794 | r_addend = 0; |
9795 | } | |
9796 | ||
9810d34d SS |
9797 | Mips_relobj<size, big_endian>* mips_obj = |
9798 | Mips_relobj<size, big_endian>::as_mips_relobj(object); | |
9799 | Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym); | |
9800 | ||
9801 | if (mips_obj->is_mips16_stub_section(data_shndx)) | |
9802 | { | |
9803 | mips_obj->get_mips16_stub_section(data_shndx) | |
9804 | ->new_global_reloc_found(r_type, mips_sym); | |
9805 | } | |
9806 | ||
9807 | if (r_type == elfcpp::R_MIPS_NONE) | |
9808 | // R_MIPS_NONE is used in mips16 stub sections, to define the target of the | |
9809 | // mips16 stub. | |
9810 | return; | |
9811 | ||
9812 | if (!mips16_call_reloc(r_type) | |
9813 | && !mips_obj->section_allows_mips16_refs(data_shndx)) | |
9814 | // This reloc would need to refer to a MIPS16 hard-float stub, if | |
9815 | // there is one. We ignore MIPS16 stub sections and .pdr section when | |
9816 | // looking for relocs that would need to refer to MIPS16 stubs. | |
9817 | mips_sym->set_need_fn_stub(); | |
9818 | ||
9819 | // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got | |
9820 | // section. We check here to avoid creating a dynamic reloc against | |
9821 | // _GLOBAL_OFFSET_TABLE_. | |
9822 | if (!target->has_got_section() | |
9823 | && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) | |
9824 | target->got_section(symtab, layout); | |
9825 | ||
9826 | // We need PLT entries if there are static-only relocations against | |
9827 | // an externally-defined function. This can technically occur for | |
9828 | // shared libraries if there are branches to the symbol, although it | |
9829 | // is unlikely that this will be used in practice due to the short | |
9830 | // ranges involved. It can occur for any relative or absolute relocation | |
9831 | // in executables; in that case, the PLT entry becomes the function's | |
9832 | // canonical address. | |
9833 | bool static_reloc = false; | |
9834 | ||
9835 | // Set CAN_MAKE_DYNAMIC to true if we can convert this | |
9836 | // relocation into a dynamic one. | |
9837 | bool can_make_dynamic = false; | |
9838 | switch (r_type) | |
9839 | { | |
9840 | case elfcpp::R_MIPS_GOT16: | |
9841 | case elfcpp::R_MIPS_CALL16: | |
9842 | case elfcpp::R_MIPS_CALL_HI16: | |
9843 | case elfcpp::R_MIPS_CALL_LO16: | |
9844 | case elfcpp::R_MIPS_GOT_HI16: | |
9845 | case elfcpp::R_MIPS_GOT_LO16: | |
9846 | case elfcpp::R_MIPS_GOT_PAGE: | |
9847 | case elfcpp::R_MIPS_GOT_OFST: | |
9848 | case elfcpp::R_MIPS_GOT_DISP: | |
9849 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
9850 | case elfcpp::R_MIPS_TLS_GD: | |
9851 | case elfcpp::R_MIPS_TLS_LDM: | |
9852 | case elfcpp::R_MIPS16_GOT16: | |
9853 | case elfcpp::R_MIPS16_CALL16: | |
9854 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
9855 | case elfcpp::R_MIPS16_TLS_GD: | |
9856 | case elfcpp::R_MIPS16_TLS_LDM: | |
9857 | case elfcpp::R_MICROMIPS_GOT16: | |
9858 | case elfcpp::R_MICROMIPS_CALL16: | |
9859 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
9860 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
9861 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
9862 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
9863 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
9864 | case elfcpp::R_MICROMIPS_GOT_OFST: | |
9865 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
9866 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
9867 | case elfcpp::R_MICROMIPS_TLS_GD: | |
9868 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
47a9f4fc | 9869 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
9870 | // We need a GOT section. |
9871 | target->got_section(symtab, layout); | |
9872 | break; | |
9873 | ||
9874 | // This is just a hint; it can safely be ignored. Don't set | |
9875 | // has_static_relocs for the corresponding symbol. | |
9876 | case elfcpp::R_MIPS_JALR: | |
9877 | case elfcpp::R_MICROMIPS_JALR: | |
9878 | break; | |
9879 | ||
9880 | case elfcpp::R_MIPS_GPREL16: | |
9881 | case elfcpp::R_MIPS_GPREL32: | |
9882 | case elfcpp::R_MIPS16_GPREL: | |
9883 | case elfcpp::R_MICROMIPS_GPREL16: | |
9884 | // TODO(sasa) | |
9885 | // GP-relative relocations always resolve to a definition in a | |
9886 | // regular input file, ignoring the one-definition rule. This is | |
9887 | // important for the GP setup sequence in NewABI code, which | |
9888 | // always resolves to a local function even if other relocations | |
9889 | // against the symbol wouldn't. | |
9890 | //constrain_symbol_p = FALSE; | |
9891 | break; | |
9892 | ||
9893 | case elfcpp::R_MIPS_32: | |
9894 | case elfcpp::R_MIPS_REL32: | |
9895 | case elfcpp::R_MIPS_64: | |
47a9f4fc VR |
9896 | if ((parameters->options().shared() |
9897 | || (strcmp(gsym->name(), "__gnu_local_gp") != 0 | |
9898 | && (!is_readonly_section(output_section) | |
9899 | || mips_obj->is_pic()))) | |
9900 | && (output_section->flags() & elfcpp::SHF_ALLOC) != 0) | |
9810d34d SS |
9901 | { |
9902 | if (r_type != elfcpp::R_MIPS_REL32) | |
47a9f4fc | 9903 | mips_sym->set_pointer_equality_needed(); |
9810d34d SS |
9904 | can_make_dynamic = true; |
9905 | break; | |
9906 | } | |
9907 | // Fall through. | |
9908 | ||
9909 | default: | |
9910 | // Most static relocations require pointer equality, except | |
9911 | // for branches. | |
9912 | mips_sym->set_pointer_equality_needed(); | |
9913 | ||
9914 | // Fall through. | |
9915 | ||
9916 | case elfcpp::R_MIPS_26: | |
9917 | case elfcpp::R_MIPS_PC16: | |
9918 | case elfcpp::R_MIPS16_26: | |
9919 | case elfcpp::R_MICROMIPS_26_S1: | |
9920 | case elfcpp::R_MICROMIPS_PC7_S1: | |
9921 | case elfcpp::R_MICROMIPS_PC10_S1: | |
9922 | case elfcpp::R_MICROMIPS_PC16_S1: | |
9923 | case elfcpp::R_MICROMIPS_PC23_S2: | |
9924 | static_reloc = true; | |
9925 | mips_sym->set_has_static_relocs(); | |
9926 | break; | |
9927 | } | |
9928 | ||
9929 | // If there are call relocations against an externally-defined symbol, | |
9930 | // see whether we can create a MIPS lazy-binding stub for it. We can | |
9931 | // only do this if all references to the function are through call | |
9932 | // relocations, and in that case, the traditional lazy-binding stubs | |
9933 | // are much more efficient than PLT entries. | |
9934 | switch (r_type) | |
9935 | { | |
9936 | case elfcpp::R_MIPS16_CALL16: | |
9937 | case elfcpp::R_MIPS_CALL16: | |
9938 | case elfcpp::R_MIPS_CALL_HI16: | |
9939 | case elfcpp::R_MIPS_CALL_LO16: | |
9940 | case elfcpp::R_MIPS_JALR: | |
9941 | case elfcpp::R_MICROMIPS_CALL16: | |
9942 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
9943 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
9944 | case elfcpp::R_MICROMIPS_JALR: | |
9945 | if (!mips_sym->no_lazy_stub()) | |
9946 | { | |
9947 | if ((mips_sym->needs_plt_entry() && mips_sym->is_from_dynobj()) | |
9948 | // Calls from shared objects to undefined symbols of type | |
9949 | // STT_NOTYPE need lazy-binding stub. | |
9950 | || (mips_sym->is_undefined() && parameters->options().shared())) | |
9951 | target->mips_stubs_section(layout)->make_entry(mips_sym); | |
9952 | } | |
9953 | break; | |
9954 | default: | |
9955 | { | |
9956 | // We must not create a stub for a symbol that has relocations | |
9957 | // related to taking the function's address. | |
9958 | mips_sym->set_no_lazy_stub(); | |
9959 | target->remove_lazy_stub_entry(mips_sym); | |
9960 | break; | |
9961 | } | |
9962 | } | |
9963 | ||
9964 | if (relocation_needs_la25_stub<size, big_endian>(mips_obj, r_type, | |
9965 | mips_sym->is_mips16())) | |
9966 | mips_sym->set_has_nonpic_branches(); | |
9967 | ||
9968 | // R_MIPS_HI16 against _gp_disp is used for $gp setup, | |
9969 | // and has a special meaning. | |
9970 | bool gp_disp_against_hi16 = (!mips_obj->is_newabi() | |
9971 | && strcmp(gsym->name(), "_gp_disp") == 0 | |
9972 | && (hi16_reloc(r_type) || lo16_reloc(r_type))); | |
9973 | if (static_reloc && gsym->needs_plt_entry()) | |
9974 | { | |
9975 | target->make_plt_entry(symtab, layout, mips_sym, r_type); | |
9976 | ||
9977 | // Since this is not a PC-relative relocation, we may be | |
9978 | // taking the address of a function. In that case we need to | |
9979 | // set the entry in the dynamic symbol table to the address of | |
9980 | // the PLT entry. | |
9981 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
9982 | { | |
9983 | gsym->set_needs_dynsym_value(); | |
9984 | // We distinguish between PLT entries and lazy-binding stubs by | |
9985 | // giving the former an st_other value of STO_MIPS_PLT. Set the | |
9986 | // flag if there are any relocations in the binary where pointer | |
9987 | // equality matters. | |
9988 | if (mips_sym->pointer_equality_needed()) | |
9989 | mips_sym->set_mips_plt(); | |
9990 | } | |
9991 | } | |
9992 | if ((static_reloc || can_make_dynamic) && !gp_disp_against_hi16) | |
9993 | { | |
9994 | // Absolute addressing relocations. | |
9995 | // Make a dynamic relocation if necessary. | |
9996 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) | |
9997 | { | |
9998 | if (gsym->may_need_copy_reloc()) | |
9999 | { | |
47a9f4fc VR |
10000 | target->copy_reloc(symtab, layout, object, data_shndx, |
10001 | output_section, gsym, r_type, r_offset); | |
9810d34d SS |
10002 | } |
10003 | else if (can_make_dynamic) | |
10004 | { | |
10005 | // Create .rel.dyn section. | |
10006 | target->rel_dyn_section(layout); | |
10007 | target->dynamic_reloc(mips_sym, elfcpp::R_MIPS_REL32, mips_obj, | |
10008 | data_shndx, output_section, r_offset); | |
10009 | } | |
10010 | else | |
10011 | gold_error(_("non-dynamic relocations refer to dynamic symbol %s"), | |
10012 | gsym->name()); | |
10013 | } | |
10014 | } | |
10015 | ||
10016 | bool for_call = false; | |
10017 | switch (r_type) | |
10018 | { | |
10019 | case elfcpp::R_MIPS_CALL16: | |
10020 | case elfcpp::R_MIPS16_CALL16: | |
10021 | case elfcpp::R_MICROMIPS_CALL16: | |
10022 | case elfcpp::R_MIPS_CALL_HI16: | |
10023 | case elfcpp::R_MIPS_CALL_LO16: | |
10024 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
10025 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
10026 | for_call = true; | |
10027 | // Fall through. | |
10028 | ||
10029 | case elfcpp::R_MIPS16_GOT16: | |
10030 | case elfcpp::R_MIPS_GOT16: | |
10031 | case elfcpp::R_MIPS_GOT_HI16: | |
10032 | case elfcpp::R_MIPS_GOT_LO16: | |
10033 | case elfcpp::R_MICROMIPS_GOT16: | |
10034 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
10035 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
10036 | case elfcpp::R_MIPS_GOT_DISP: | |
10037 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
47a9f4fc | 10038 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
10039 | { |
10040 | // The symbol requires a GOT entry. | |
10041 | Mips_output_data_got<size, big_endian>* got = | |
10042 | target->got_section(symtab, layout); | |
10043 | got->record_global_got_symbol(mips_sym, mips_obj, r_type, false, | |
10044 | for_call); | |
10045 | mips_sym->set_global_got_area(GGA_NORMAL); | |
10046 | } | |
10047 | break; | |
10048 | ||
10049 | case elfcpp::R_MIPS_GOT_PAGE: | |
10050 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
10051 | { | |
10052 | // This relocation needs a page entry in the GOT. | |
10053 | // Get the section contents. | |
10054 | section_size_type view_size = 0; | |
10055 | const unsigned char* view = | |
10056 | object->section_contents(data_shndx, &view_size, false); | |
10057 | view += r_offset; | |
10058 | ||
10059 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
10060 | Valtype32 addend = (rel_type == elfcpp::SHT_REL ? val & 0xffff | |
10061 | : r_addend); | |
10062 | Mips_output_data_got<size, big_endian>* got = | |
10063 | target->got_section(symtab, layout); | |
10064 | got->record_got_page_entry(mips_obj, r_sym, addend); | |
10065 | ||
10066 | // If this is a global, overridable symbol, GOT_PAGE will | |
10067 | // decay to GOT_DISP, so we'll need a GOT entry for it. | |
10068 | bool def_regular = (mips_sym->source() == Symbol::FROM_OBJECT | |
10069 | && !mips_sym->object()->is_dynamic() | |
10070 | && !mips_sym->is_undefined()); | |
10071 | if (!def_regular | |
10072 | || (parameters->options().output_is_position_independent() | |
10073 | && !parameters->options().Bsymbolic() | |
10074 | && !mips_sym->is_forced_local())) | |
10075 | { | |
10076 | got->record_global_got_symbol(mips_sym, mips_obj, r_type, false, | |
10077 | for_call); | |
10078 | mips_sym->set_global_got_area(GGA_NORMAL); | |
10079 | } | |
10080 | } | |
10081 | break; | |
10082 | ||
10083 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
10084 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
10085 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
10086 | case elfcpp::R_MIPS_TLS_LDM: | |
10087 | case elfcpp::R_MIPS16_TLS_LDM: | |
10088 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
10089 | case elfcpp::R_MIPS_TLS_GD: | |
10090 | case elfcpp::R_MIPS16_TLS_GD: | |
10091 | case elfcpp::R_MICROMIPS_TLS_GD: | |
10092 | { | |
10093 | const bool is_final = gsym->final_value_is_known(); | |
10094 | const tls::Tls_optimization optimized_type = | |
10095 | Target_mips<size, big_endian>::optimize_tls_reloc(is_final, r_type); | |
10096 | ||
10097 | switch (r_type) | |
10098 | { | |
10099 | case elfcpp::R_MIPS_TLS_GD: | |
10100 | case elfcpp::R_MIPS16_TLS_GD: | |
10101 | case elfcpp::R_MICROMIPS_TLS_GD: | |
10102 | if (optimized_type == tls::TLSOPT_NONE) | |
10103 | { | |
10104 | // Create a pair of GOT entries for the module index and | |
10105 | // dtv-relative offset. | |
10106 | Mips_output_data_got<size, big_endian>* got = | |
10107 | target->got_section(symtab, layout); | |
10108 | got->record_global_got_symbol(mips_sym, mips_obj, r_type, false, | |
10109 | false); | |
10110 | } | |
10111 | else | |
10112 | { | |
10113 | // FIXME: TLS optimization not supported yet. | |
10114 | gold_unreachable(); | |
10115 | } | |
10116 | break; | |
10117 | ||
10118 | case elfcpp::R_MIPS_TLS_LDM: | |
10119 | case elfcpp::R_MIPS16_TLS_LDM: | |
10120 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
10121 | if (optimized_type == tls::TLSOPT_NONE) | |
10122 | { | |
10123 | // We always record LDM symbols as local with index 0. | |
10124 | target->got_section()->record_local_got_symbol(mips_obj, 0, | |
10125 | r_addend, r_type, | |
47a9f4fc | 10126 | -1U, false); |
9810d34d SS |
10127 | } |
10128 | else | |
10129 | { | |
10130 | // FIXME: TLS optimization not supported yet. | |
10131 | gold_unreachable(); | |
10132 | } | |
10133 | break; | |
10134 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
10135 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
10136 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
10137 | layout->set_has_static_tls(); | |
10138 | if (optimized_type == tls::TLSOPT_NONE) | |
10139 | { | |
10140 | // Create a GOT entry for the tp-relative offset. | |
10141 | Mips_output_data_got<size, big_endian>* got = | |
10142 | target->got_section(symtab, layout); | |
10143 | got->record_global_got_symbol(mips_sym, mips_obj, r_type, false, | |
10144 | false); | |
10145 | } | |
10146 | else | |
10147 | { | |
10148 | // FIXME: TLS optimization not supported yet. | |
10149 | gold_unreachable(); | |
10150 | } | |
10151 | break; | |
10152 | ||
10153 | default: | |
10154 | gold_unreachable(); | |
10155 | } | |
10156 | } | |
10157 | break; | |
10158 | case elfcpp::R_MIPS_COPY: | |
10159 | case elfcpp::R_MIPS_JUMP_SLOT: | |
10160 | // These are relocations which should only be seen by the | |
10161 | // dynamic linker, and should never be seen here. | |
10162 | gold_error(_("%s: unexpected reloc %u in object file"), | |
10163 | object->name().c_str(), r_type); | |
10164 | break; | |
10165 | ||
10166 | default: | |
10167 | break; | |
10168 | } | |
10169 | ||
10170 | // Refuse some position-dependent relocations when creating a | |
10171 | // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're | |
10172 | // not PIC, but we can create dynamic relocations and the result | |
10173 | // will be fine. Also do not refuse R_MIPS_LO16, which can be | |
10174 | // combined with R_MIPS_GOT16. | |
10175 | if (parameters->options().shared()) | |
10176 | { | |
10177 | switch (r_type) | |
10178 | { | |
10179 | case elfcpp::R_MIPS16_HI16: | |
10180 | case elfcpp::R_MIPS_HI16: | |
10181 | case elfcpp::R_MICROMIPS_HI16: | |
10182 | // Don't refuse a high part relocation if it's against | |
10183 | // no symbol (e.g. part of a compound relocation). | |
10184 | if (r_sym == 0) | |
10185 | break; | |
10186 | ||
10187 | // R_MIPS_HI16 against _gp_disp is used for $gp setup, | |
10188 | // and has a special meaning. | |
10189 | if (!mips_obj->is_newabi() && strcmp(gsym->name(), "_gp_disp") == 0) | |
10190 | break; | |
10191 | ||
10192 | // FALLTHROUGH | |
10193 | ||
10194 | case elfcpp::R_MIPS16_26: | |
10195 | case elfcpp::R_MIPS_26: | |
10196 | case elfcpp::R_MICROMIPS_26_S1: | |
10197 | gold_error(_("%s: relocation %u against `%s' can not be used when " | |
10198 | "making a shared object; recompile with -fPIC"), | |
10199 | object->name().c_str(), r_type, gsym->name()); | |
10200 | default: | |
10201 | break; | |
10202 | } | |
10203 | } | |
10204 | } | |
10205 | ||
10206 | template<int size, bool big_endian> | |
10207 | inline void | |
10208 | Target_mips<size, big_endian>::Scan::global( | |
10209 | Symbol_table* symtab, | |
10210 | Layout* layout, | |
10211 | Target_mips<size, big_endian>* target, | |
10212 | Sized_relobj_file<size, big_endian>* object, | |
10213 | unsigned int data_shndx, | |
10214 | Output_section* output_section, | |
4d625b70 | 10215 | const Relatype& reloc, |
9810d34d SS |
10216 | unsigned int r_type, |
10217 | Symbol* gsym) | |
10218 | { | |
10219 | global( | |
10220 | symtab, | |
10221 | layout, | |
10222 | target, | |
10223 | object, | |
10224 | data_shndx, | |
10225 | output_section, | |
10226 | &reloc, | |
4d625b70 | 10227 | (const Reltype*) NULL, |
9810d34d SS |
10228 | elfcpp::SHT_RELA, |
10229 | r_type, | |
10230 | gsym); | |
10231 | } | |
10232 | ||
10233 | template<int size, bool big_endian> | |
10234 | inline void | |
10235 | Target_mips<size, big_endian>::Scan::global( | |
10236 | Symbol_table* symtab, | |
10237 | Layout* layout, | |
10238 | Target_mips<size, big_endian>* target, | |
10239 | Sized_relobj_file<size, big_endian>* object, | |
10240 | unsigned int data_shndx, | |
10241 | Output_section* output_section, | |
4d625b70 | 10242 | const Reltype& reloc, |
9810d34d SS |
10243 | unsigned int r_type, |
10244 | Symbol* gsym) | |
10245 | { | |
10246 | global( | |
10247 | symtab, | |
10248 | layout, | |
10249 | target, | |
10250 | object, | |
10251 | data_shndx, | |
10252 | output_section, | |
4d625b70 | 10253 | (const Relatype*) NULL, |
9810d34d SS |
10254 | &reloc, |
10255 | elfcpp::SHT_REL, | |
10256 | r_type, | |
10257 | gsym); | |
10258 | } | |
10259 | ||
47a9f4fc VR |
10260 | // Return whether a R_MIPS_32/R_MIPS64 relocation needs to be applied. |
10261 | // In cases where Scan::local() or Scan::global() has created | |
10262 | // a dynamic relocation, the addend of the relocation is carried | |
10263 | // in the data, and we must not apply the static relocation. | |
9810d34d SS |
10264 | |
10265 | template<int size, bool big_endian> | |
10266 | inline bool | |
47a9f4fc | 10267 | Target_mips<size, big_endian>::Relocate::should_apply_static_reloc( |
9810d34d SS |
10268 | const Mips_symbol<size>* gsym, |
10269 | unsigned int r_type, | |
10270 | Output_section* output_section, | |
10271 | Target_mips* target) | |
10272 | { | |
10273 | // If the output section is not allocated, then we didn't call | |
10274 | // scan_relocs, we didn't create a dynamic reloc, and we must apply | |
10275 | // the reloc here. | |
10276 | if ((output_section->flags() & elfcpp::SHF_ALLOC) == 0) | |
10277 | return true; | |
10278 | ||
10279 | if (gsym == NULL) | |
10280 | return true; | |
10281 | else | |
10282 | { | |
10283 | // For global symbols, we use the same helper routines used in the | |
10284 | // scan pass. | |
10285 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)) | |
10286 | && !gsym->may_need_copy_reloc()) | |
10287 | { | |
10288 | // We have generated dynamic reloc (R_MIPS_REL32). | |
10289 | ||
10290 | bool multi_got = false; | |
10291 | if (target->has_got_section()) | |
10292 | multi_got = target->got_section()->multi_got(); | |
10293 | bool has_got_offset; | |
10294 | if (!multi_got) | |
10295 | has_got_offset = gsym->has_got_offset(GOT_TYPE_STANDARD); | |
10296 | else | |
10297 | has_got_offset = gsym->global_gotoffset() != -1U; | |
10298 | if (!has_got_offset) | |
10299 | return true; | |
10300 | else | |
10301 | // Apply the relocation only if the symbol is in the local got. | |
10302 | // Do not apply the relocation if the symbol is in the global | |
10303 | // got. | |
10304 | return symbol_references_local(gsym, gsym->has_dynsym_index()); | |
10305 | } | |
10306 | else | |
10307 | // We have not generated dynamic reloc. | |
10308 | return true; | |
10309 | } | |
10310 | } | |
10311 | ||
10312 | // Perform a relocation. | |
10313 | ||
10314 | template<int size, bool big_endian> | |
10315 | inline bool | |
10316 | Target_mips<size, big_endian>::Relocate::relocate( | |
10317 | const Relocate_info<size, big_endian>* relinfo, | |
91a65d2f | 10318 | unsigned int rel_type, |
9810d34d SS |
10319 | Target_mips* target, |
10320 | Output_section* output_section, | |
10321 | size_t relnum, | |
91a65d2f | 10322 | const unsigned char* preloc, |
9810d34d SS |
10323 | const Sized_symbol<size>* gsym, |
10324 | const Symbol_value<size>* psymval, | |
10325 | unsigned char* view, | |
10326 | Mips_address address, | |
10327 | section_size_type) | |
10328 | { | |
10329 | Mips_address r_offset; | |
4d625b70 CC |
10330 | unsigned int r_sym; |
10331 | unsigned int r_type; | |
47a9f4fc VR |
10332 | unsigned int r_type2; |
10333 | unsigned int r_type3; | |
10334 | unsigned char r_ssym; | |
9810d34d SS |
10335 | typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
10336 | ||
10337 | if (rel_type == elfcpp::SHT_RELA) | |
10338 | { | |
4d625b70 | 10339 | const Relatype rela(preloc); |
91a65d2f | 10340 | r_offset = rela.get_r_offset(); |
4d625b70 CC |
10341 | r_sym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: |
10342 | get_r_sym(&rela); | |
10343 | r_type = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: | |
10344 | get_r_type(&rela); | |
47a9f4fc VR |
10345 | r_type2 = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: |
10346 | get_r_type2(&rela); | |
10347 | r_type3 = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: | |
10348 | get_r_type3(&rela); | |
10349 | r_ssym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: | |
10350 | get_r_ssym(&rela); | |
91a65d2f | 10351 | r_addend = rela.get_r_addend(); |
9810d34d SS |
10352 | } |
10353 | else | |
10354 | { | |
4d625b70 | 10355 | const Reltype rel(preloc); |
91a65d2f | 10356 | r_offset = rel.get_r_offset(); |
4d625b70 CC |
10357 | r_sym = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: |
10358 | get_r_sym(&rel); | |
10359 | r_type = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: | |
10360 | get_r_type(&rel); | |
47a9f4fc VR |
10361 | r_ssym = 0; |
10362 | r_type2 = 0; | |
10363 | r_type3 = 0; | |
9810d34d SS |
10364 | r_addend = 0; |
10365 | } | |
10366 | ||
10367 | typedef Mips_relocate_functions<size, big_endian> Reloc_funcs; | |
10368 | typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY; | |
10369 | ||
10370 | Mips_relobj<size, big_endian>* object = | |
4d625b70 | 10371 | Mips_relobj<size, big_endian>::as_mips_relobj(relinfo->object); |
9810d34d | 10372 | |
9810d34d SS |
10373 | bool target_is_16_bit_code = false; |
10374 | bool target_is_micromips_code = false; | |
10375 | bool cross_mode_jump; | |
10376 | ||
10377 | Symbol_value<size> symval; | |
10378 | ||
10379 | const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym); | |
10380 | ||
10381 | bool changed_symbol_value = false; | |
10382 | if (gsym == NULL) | |
10383 | { | |
10384 | target_is_16_bit_code = object->local_symbol_is_mips16(r_sym); | |
10385 | target_is_micromips_code = object->local_symbol_is_micromips(r_sym); | |
10386 | if (target_is_16_bit_code || target_is_micromips_code) | |
10387 | { | |
10388 | // MIPS16/microMIPS text labels should be treated as odd. | |
10389 | symval.set_output_value(psymval->value(object, 1)); | |
10390 | psymval = &symval; | |
10391 | changed_symbol_value = true; | |
10392 | } | |
10393 | } | |
10394 | else | |
10395 | { | |
10396 | target_is_16_bit_code = mips_sym->is_mips16(); | |
10397 | target_is_micromips_code = mips_sym->is_micromips(); | |
10398 | ||
10399 | // If this is a mips16/microMIPS text symbol, add 1 to the value to make | |
10400 | // it odd. This will cause something like .word SYM to come up with | |
10401 | // the right value when it is loaded into the PC. | |
10402 | ||
10403 | if ((mips_sym->is_mips16() || mips_sym->is_micromips()) | |
10404 | && psymval->value(object, 0) != 0) | |
10405 | { | |
10406 | symval.set_output_value(psymval->value(object, 0) | 1); | |
10407 | psymval = &symval; | |
10408 | changed_symbol_value = true; | |
10409 | } | |
10410 | ||
10411 | // Pick the value to use for symbols defined in shared objects. | |
10412 | if (mips_sym->use_plt_offset(Scan::get_reference_flags(r_type)) | |
10413 | || mips_sym->has_lazy_stub()) | |
10414 | { | |
10415 | Mips_address value; | |
10416 | if (!mips_sym->has_lazy_stub()) | |
10417 | { | |
10418 | // Prefer a standard MIPS PLT entry. | |
10419 | if (mips_sym->has_mips_plt_offset()) | |
10420 | { | |
10421 | value = target->plt_section()->mips_entry_address(mips_sym); | |
10422 | target_is_micromips_code = false; | |
10423 | target_is_16_bit_code = false; | |
10424 | } | |
10425 | else | |
10426 | { | |
10427 | value = (target->plt_section()->comp_entry_address(mips_sym) | |
10428 | + 1); | |
10429 | if (target->is_output_micromips()) | |
10430 | target_is_micromips_code = true; | |
10431 | else | |
10432 | target_is_16_bit_code = true; | |
10433 | } | |
10434 | } | |
10435 | else | |
10436 | value = target->mips_stubs_section()->stub_address(mips_sym); | |
10437 | ||
10438 | symval.set_output_value(value); | |
10439 | psymval = &symval; | |
10440 | } | |
10441 | } | |
10442 | ||
10443 | // TRUE if the symbol referred to by this relocation is "_gp_disp". | |
10444 | // Note that such a symbol must always be a global symbol. | |
10445 | bool gp_disp = (gsym != NULL && (strcmp(gsym->name(), "_gp_disp") == 0) | |
10446 | && !object->is_newabi()); | |
10447 | ||
10448 | // TRUE if the symbol referred to by this relocation is "__gnu_local_gp". | |
10449 | // Note that such a symbol must always be a global symbol. | |
10450 | bool gnu_local_gp = gsym && (strcmp(gsym->name(), "__gnu_local_gp") == 0); | |
10451 | ||
10452 | ||
10453 | if (gp_disp) | |
10454 | { | |
10455 | if (!hi16_reloc(r_type) && !lo16_reloc(r_type)) | |
10456 | gold_error_at_location(relinfo, relnum, r_offset, | |
10457 | _("relocations against _gp_disp are permitted only" | |
10458 | " with R_MIPS_HI16 and R_MIPS_LO16 relocations.")); | |
10459 | } | |
10460 | else if (gnu_local_gp) | |
10461 | { | |
10462 | // __gnu_local_gp is _gp symbol. | |
10463 | symval.set_output_value(target->adjusted_gp_value(object)); | |
10464 | psymval = &symval; | |
10465 | } | |
10466 | ||
10467 | // If this is a reference to a 16-bit function with a stub, we need | |
10468 | // to redirect the relocation to the stub unless: | |
10469 | // | |
10470 | // (a) the relocation is for a MIPS16 JAL; | |
10471 | // | |
10472 | // (b) the relocation is for a MIPS16 PIC call, and there are no | |
10473 | // non-MIPS16 uses of the GOT slot; or | |
10474 | // | |
10475 | // (c) the section allows direct references to MIPS16 functions. | |
10476 | if (r_type != elfcpp::R_MIPS16_26 | |
10477 | && !parameters->options().relocatable() | |
10478 | && ((mips_sym != NULL | |
10479 | && mips_sym->has_mips16_fn_stub() | |
10480 | && (r_type != elfcpp::R_MIPS16_CALL16 || mips_sym->need_fn_stub())) | |
10481 | || (mips_sym == NULL | |
10482 | && object->get_local_mips16_fn_stub(r_sym) != NULL)) | |
10483 | && !object->section_allows_mips16_refs(relinfo->data_shndx)) | |
10484 | { | |
10485 | // This is a 32- or 64-bit call to a 16-bit function. We should | |
10486 | // have already noticed that we were going to need the | |
10487 | // stub. | |
10488 | Mips_address value; | |
10489 | if (mips_sym == NULL) | |
10490 | value = object->get_local_mips16_fn_stub(r_sym)->output_address(); | |
10491 | else | |
10492 | { | |
10493 | gold_assert(mips_sym->need_fn_stub()); | |
10494 | if (mips_sym->has_la25_stub()) | |
10495 | value = target->la25_stub_section()->stub_address(mips_sym); | |
10496 | else | |
10497 | { | |
10498 | value = mips_sym->template | |
10499 | get_mips16_fn_stub<big_endian>()->output_address(); | |
10500 | } | |
10501 | } | |
10502 | symval.set_output_value(value); | |
10503 | psymval = &symval; | |
10504 | changed_symbol_value = true; | |
10505 | ||
10506 | // The target is 16-bit, but the stub isn't. | |
10507 | target_is_16_bit_code = false; | |
10508 | } | |
10509 | // If this is a MIPS16 call with a stub, that is made through the PLT or | |
10510 | // to a standard MIPS function, we need to redirect the call to the stub. | |
10511 | // Note that we specifically exclude R_MIPS16_CALL16 from this behavior; | |
10512 | // indirect calls should use an indirect stub instead. | |
10513 | else if (r_type == elfcpp::R_MIPS16_26 && !parameters->options().relocatable() | |
10514 | && ((mips_sym != NULL | |
10515 | && (mips_sym->has_mips16_call_stub() | |
10516 | || mips_sym->has_mips16_call_fp_stub())) | |
10517 | || (mips_sym == NULL | |
10518 | && object->get_local_mips16_call_stub(r_sym) != NULL)) | |
10519 | && ((mips_sym != NULL && mips_sym->has_plt_offset()) | |
10520 | || !target_is_16_bit_code)) | |
10521 | { | |
10522 | Mips16_stub_section<size, big_endian>* call_stub; | |
10523 | if (mips_sym == NULL) | |
10524 | call_stub = object->get_local_mips16_call_stub(r_sym); | |
10525 | else | |
10526 | { | |
10527 | // If both call_stub and call_fp_stub are defined, we can figure | |
10528 | // out which one to use by checking which one appears in the input | |
10529 | // file. | |
10530 | if (mips_sym->has_mips16_call_stub() | |
10531 | && mips_sym->has_mips16_call_fp_stub()) | |
10532 | { | |
10533 | call_stub = NULL; | |
10534 | for (unsigned int i = 1; i < object->shnum(); ++i) | |
10535 | { | |
10536 | if (object->is_mips16_call_fp_stub_section(i)) | |
10537 | { | |
10538 | call_stub = mips_sym->template | |
10539 | get_mips16_call_fp_stub<big_endian>(); | |
10540 | break; | |
10541 | } | |
10542 | ||
10543 | } | |
10544 | if (call_stub == NULL) | |
10545 | call_stub = | |
10546 | mips_sym->template get_mips16_call_stub<big_endian>(); | |
10547 | } | |
10548 | else if (mips_sym->has_mips16_call_stub()) | |
10549 | call_stub = mips_sym->template get_mips16_call_stub<big_endian>(); | |
10550 | else | |
10551 | call_stub = mips_sym->template get_mips16_call_fp_stub<big_endian>(); | |
10552 | } | |
10553 | ||
10554 | symval.set_output_value(call_stub->output_address()); | |
10555 | psymval = &symval; | |
10556 | changed_symbol_value = true; | |
10557 | } | |
10558 | // If this is a direct call to a PIC function, redirect to the | |
10559 | // non-PIC stub. | |
10560 | else if (mips_sym != NULL | |
10561 | && mips_sym->has_la25_stub() | |
10562 | && relocation_needs_la25_stub<size, big_endian>( | |
10563 | object, r_type, target_is_16_bit_code)) | |
10564 | { | |
10565 | Mips_address value = target->la25_stub_section()->stub_address(mips_sym); | |
10566 | if (mips_sym->is_micromips()) | |
10567 | value += 1; | |
10568 | symval.set_output_value(value); | |
10569 | psymval = &symval; | |
10570 | } | |
10571 | // For direct MIPS16 and microMIPS calls make sure the compressed PLT | |
10572 | // entry is used if a standard PLT entry has also been made. | |
10573 | else if ((r_type == elfcpp::R_MIPS16_26 | |
10574 | || r_type == elfcpp::R_MICROMIPS_26_S1) | |
10575 | && !parameters->options().relocatable() | |
10576 | && mips_sym != NULL | |
10577 | && mips_sym->has_plt_offset() | |
10578 | && mips_sym->has_comp_plt_offset() | |
10579 | && mips_sym->has_mips_plt_offset()) | |
10580 | { | |
10581 | Mips_address value = (target->plt_section()->comp_entry_address(mips_sym) | |
10582 | + 1); | |
10583 | symval.set_output_value(value); | |
10584 | psymval = &symval; | |
10585 | ||
10586 | target_is_16_bit_code = !target->is_output_micromips(); | |
10587 | target_is_micromips_code = target->is_output_micromips(); | |
10588 | } | |
10589 | ||
10590 | // Make sure MIPS16 and microMIPS are not used together. | |
10591 | if ((r_type == elfcpp::R_MIPS16_26 && target_is_micromips_code) | |
10592 | || (micromips_branch_reloc(r_type) && target_is_16_bit_code)) | |
10593 | { | |
10594 | gold_error(_("MIPS16 and microMIPS functions cannot call each other")); | |
10595 | } | |
10596 | ||
10597 | // Calls from 16-bit code to 32-bit code and vice versa require the | |
10598 | // mode change. However, we can ignore calls to undefined weak symbols, | |
10599 | // which should never be executed at runtime. This exception is important | |
10600 | // because the assembly writer may have "known" that any definition of the | |
10601 | // symbol would be 16-bit code, and that direct jumps were therefore | |
10602 | // acceptable. | |
10603 | cross_mode_jump = | |
10604 | (!parameters->options().relocatable() | |
10605 | && !(gsym != NULL && gsym->is_weak_undefined()) | |
10606 | && ((r_type == elfcpp::R_MIPS16_26 && !target_is_16_bit_code) | |
10607 | || (r_type == elfcpp::R_MICROMIPS_26_S1 && !target_is_micromips_code) | |
10608 | || ((r_type == elfcpp::R_MIPS_26 || r_type == elfcpp::R_MIPS_JALR) | |
10609 | && (target_is_16_bit_code || target_is_micromips_code)))); | |
10610 | ||
10611 | bool local = (mips_sym == NULL | |
10612 | || (mips_sym->got_only_for_calls() | |
10613 | ? symbol_calls_local(mips_sym, mips_sym->has_dynsym_index()) | |
10614 | : symbol_references_local(mips_sym, | |
10615 | mips_sym->has_dynsym_index()))); | |
10616 | ||
10617 | // Global R_MIPS_GOT_PAGE/R_MICROMIPS_GOT_PAGE relocations are equivalent | |
10618 | // to R_MIPS_GOT_DISP/R_MICROMIPS_GOT_DISP. The addend is applied by the | |
10619 | // corresponding R_MIPS_GOT_OFST/R_MICROMIPS_GOT_OFST. | |
10620 | if (got_page_reloc(r_type) && !local) | |
10621 | r_type = (micromips_reloc(r_type) ? elfcpp::R_MICROMIPS_GOT_DISP | |
10622 | : elfcpp::R_MIPS_GOT_DISP); | |
10623 | ||
10624 | unsigned int got_offset = 0; | |
10625 | int gp_offset = 0; | |
10626 | ||
47a9f4fc VR |
10627 | bool calculate_only = false; |
10628 | Valtype calculated_value = 0; | |
9810d34d | 10629 | bool extract_addend = rel_type == elfcpp::SHT_REL; |
47a9f4fc VR |
10630 | unsigned int r_types[3] = { r_type, r_type2, r_type3 }; |
10631 | ||
10632 | Reloc_funcs::mips_reloc_unshuffle(view, r_type, false); | |
10633 | ||
10634 | // For Mips64 N64 ABI, there may be up to three operations specified per | |
10635 | // record, by the fields r_type, r_type2, and r_type3. The first operation | |
10636 | // takes its addend from the relocation record. Each subsequent operation | |
10637 | // takes as its addend the result of the previous operation. | |
10638 | // The first operation in a record which references a symbol uses the symbol | |
10639 | // implied by r_sym. The next operation in a record which references a symbol | |
10640 | // uses the special symbol value given by the r_ssym field. A third operation | |
10641 | // in a record which references a symbol will assume a NULL symbol, | |
10642 | // i.e. value zero. | |
10643 | ||
10644 | // TODO(Vladimir) | |
10645 | // Check if a record references to a symbol. | |
10646 | for (unsigned int i = 0; i < 3; ++i) | |
9810d34d | 10647 | { |
47a9f4fc VR |
10648 | if (r_types[i] == elfcpp::R_MIPS_NONE) |
10649 | break; | |
9810d34d | 10650 | |
47a9f4fc VR |
10651 | // TODO(Vladimir) |
10652 | // Check if the next relocation is for the same instruction. | |
10653 | calculate_only = i == 2 ? false | |
10654 | : r_types[i+1] != elfcpp::R_MIPS_NONE; | |
10655 | ||
10656 | if (object->is_n64()) | |
9810d34d | 10657 | { |
47a9f4fc | 10658 | if (i == 1) |
9810d34d | 10659 | { |
47a9f4fc VR |
10660 | // Handle special symbol for r_type2 relocation type. |
10661 | switch (r_ssym) | |
10662 | { | |
10663 | case RSS_UNDEF: | |
10664 | symval.set_output_value(0); | |
10665 | break; | |
10666 | case RSS_GP: | |
10667 | symval.set_output_value(target->gp_value()); | |
10668 | break; | |
10669 | case RSS_GP0: | |
10670 | symval.set_output_value(object->gp_value()); | |
10671 | break; | |
10672 | case RSS_LOC: | |
10673 | symval.set_output_value(address); | |
10674 | break; | |
10675 | default: | |
10676 | gold_unreachable(); | |
10677 | } | |
9810d34d SS |
10678 | psymval = &symval; |
10679 | } | |
47a9f4fc VR |
10680 | else if (i == 2) |
10681 | { | |
10682 | // For r_type3 symbol value is 0. | |
10683 | symval.set_output_value(0); | |
10684 | } | |
9810d34d | 10685 | } |
9810d34d | 10686 | |
47a9f4fc VR |
10687 | bool update_got_entry = false; |
10688 | switch (r_types[i]) | |
10689 | { | |
10690 | case elfcpp::R_MIPS_NONE: | |
10691 | break; | |
10692 | case elfcpp::R_MIPS_16: | |
10693 | reloc_status = Reloc_funcs::rel16(view, object, psymval, r_addend, | |
10694 | extract_addend, calculate_only, | |
10695 | &calculated_value); | |
10696 | break; | |
9810d34d | 10697 | |
47a9f4fc VR |
10698 | case elfcpp::R_MIPS_32: |
10699 | if (should_apply_static_reloc(mips_sym, r_types[i], output_section, | |
10700 | target)) | |
10701 | reloc_status = Reloc_funcs::rel32(view, object, psymval, r_addend, | |
10702 | extract_addend, calculate_only, | |
10703 | &calculated_value); | |
10704 | if (mips_sym != NULL | |
10705 | && (mips_sym->is_mips16() || mips_sym->is_micromips()) | |
10706 | && mips_sym->global_got_area() == GGA_RELOC_ONLY) | |
10707 | { | |
10708 | // If mips_sym->has_mips16_fn_stub() is false, symbol value is | |
10709 | // already updated by adding +1. | |
10710 | if (mips_sym->has_mips16_fn_stub()) | |
10711 | { | |
10712 | gold_assert(mips_sym->need_fn_stub()); | |
10713 | Mips16_stub_section<size, big_endian>* fn_stub = | |
10714 | mips_sym->template get_mips16_fn_stub<big_endian>(); | |
9810d34d | 10715 | |
47a9f4fc VR |
10716 | symval.set_output_value(fn_stub->output_address()); |
10717 | psymval = &symval; | |
10718 | } | |
10719 | got_offset = mips_sym->global_gotoffset(); | |
10720 | update_got_entry = true; | |
10721 | } | |
10722 | break; | |
9810d34d | 10723 | |
47a9f4fc VR |
10724 | case elfcpp::R_MIPS_64: |
10725 | if (should_apply_static_reloc(mips_sym, r_types[i], output_section, | |
10726 | target)) | |
10727 | reloc_status = Reloc_funcs::rel64(view, object, psymval, r_addend, | |
10728 | extract_addend, calculate_only, | |
10729 | &calculated_value, false); | |
10730 | else if (target->is_output_n64() && r_addend != 0) | |
10731 | // Only apply the addend. The static relocation was RELA, but the | |
10732 | // dynamic relocation is REL, so we need to apply the addend. | |
10733 | reloc_status = Reloc_funcs::rel64(view, object, psymval, r_addend, | |
10734 | extract_addend, calculate_only, | |
10735 | &calculated_value, true); | |
10736 | break; | |
10737 | case elfcpp::R_MIPS_REL32: | |
10738 | gold_unreachable(); | |
9810d34d | 10739 | |
47a9f4fc VR |
10740 | case elfcpp::R_MIPS_PC32: |
10741 | reloc_status = Reloc_funcs::relpc32(view, object, psymval, address, | |
10742 | r_addend, extract_addend, | |
10743 | calculate_only, | |
10744 | &calculated_value); | |
10745 | break; | |
9810d34d | 10746 | |
47a9f4fc VR |
10747 | case elfcpp::R_MIPS16_26: |
10748 | // The calculation for R_MIPS16_26 is just the same as for an | |
10749 | // R_MIPS_26. It's only the storage of the relocated field into | |
10750 | // the output file that's different. So, we just fall through to the | |
10751 | // R_MIPS_26 case here. | |
10752 | case elfcpp::R_MIPS_26: | |
10753 | case elfcpp::R_MICROMIPS_26_S1: | |
10754 | reloc_status = Reloc_funcs::rel26(view, object, psymval, address, | |
10755 | gsym == NULL, r_addend, extract_addend, gsym, cross_mode_jump, | |
10756 | r_types[i], target->jal_to_bal(), calculate_only, | |
10757 | &calculated_value); | |
10758 | break; | |
9810d34d | 10759 | |
47a9f4fc VR |
10760 | case elfcpp::R_MIPS_HI16: |
10761 | case elfcpp::R_MIPS16_HI16: | |
10762 | case elfcpp::R_MICROMIPS_HI16: | |
10763 | if (rel_type == elfcpp::SHT_RELA) | |
10764 | reloc_status = Reloc_funcs::do_relhi16(view, object, psymval, | |
10765 | r_addend, address, | |
10766 | gp_disp, r_types[i], | |
10767 | extract_addend, 0, | |
10768 | target, calculate_only, | |
10769 | &calculated_value); | |
10770 | else if (rel_type == elfcpp::SHT_REL) | |
10771 | reloc_status = Reloc_funcs::relhi16(view, object, psymval, r_addend, | |
10772 | address, gp_disp, r_types[i], | |
10773 | r_sym, extract_addend); | |
10774 | else | |
10775 | gold_unreachable(); | |
10776 | break; | |
9810d34d | 10777 | |
47a9f4fc VR |
10778 | case elfcpp::R_MIPS_LO16: |
10779 | case elfcpp::R_MIPS16_LO16: | |
10780 | case elfcpp::R_MICROMIPS_LO16: | |
10781 | case elfcpp::R_MICROMIPS_HI0_LO16: | |
10782 | reloc_status = Reloc_funcs::rello16(target, view, object, psymval, | |
10783 | r_addend, extract_addend, address, | |
10784 | gp_disp, r_types[i], r_sym, | |
10785 | rel_type, calculate_only, | |
10786 | &calculated_value); | |
10787 | break; | |
9810d34d | 10788 | |
47a9f4fc VR |
10789 | case elfcpp::R_MIPS_LITERAL: |
10790 | case elfcpp::R_MICROMIPS_LITERAL: | |
10791 | // Because we don't merge literal sections, we can handle this | |
10792 | // just like R_MIPS_GPREL16. In the long run, we should merge | |
10793 | // shared literals, and then we will need to additional work | |
10794 | // here. | |
9810d34d | 10795 | |
47a9f4fc | 10796 | // Fall through. |
9810d34d | 10797 | |
47a9f4fc VR |
10798 | case elfcpp::R_MIPS_GPREL16: |
10799 | case elfcpp::R_MIPS16_GPREL: | |
10800 | case elfcpp::R_MICROMIPS_GPREL7_S2: | |
10801 | case elfcpp::R_MICROMIPS_GPREL16: | |
10802 | reloc_status = Reloc_funcs::relgprel(view, object, psymval, | |
10803 | target->adjusted_gp_value(object), | |
10804 | r_addend, extract_addend, | |
10805 | gsym == NULL, r_types[i], | |
10806 | calculate_only, &calculated_value); | |
10807 | break; | |
9810d34d | 10808 | |
47a9f4fc VR |
10809 | case elfcpp::R_MIPS_PC16: |
10810 | reloc_status = Reloc_funcs::relpc16(view, object, psymval, address, | |
10811 | r_addend, extract_addend, | |
10812 | calculate_only, | |
10813 | &calculated_value); | |
10814 | break; | |
10815 | case elfcpp::R_MICROMIPS_PC7_S1: | |
10816 | reloc_status = Reloc_funcs::relmicromips_pc7_s1(view, object, psymval, | |
10817 | address, r_addend, | |
10818 | extract_addend, | |
10819 | calculate_only, | |
10820 | &calculated_value); | |
10821 | break; | |
10822 | case elfcpp::R_MICROMIPS_PC10_S1: | |
10823 | reloc_status = Reloc_funcs::relmicromips_pc10_s1(view, object, | |
10824 | psymval, address, | |
10825 | r_addend, extract_addend, | |
10826 | calculate_only, | |
10827 | &calculated_value); | |
10828 | break; | |
10829 | case elfcpp::R_MICROMIPS_PC16_S1: | |
10830 | reloc_status = Reloc_funcs::relmicromips_pc16_s1(view, object, | |
10831 | psymval, address, | |
10832 | r_addend, extract_addend, | |
10833 | calculate_only, | |
10834 | &calculated_value); | |
10835 | break; | |
10836 | case elfcpp::R_MIPS_GPREL32: | |
10837 | reloc_status = Reloc_funcs::relgprel32(view, object, psymval, | |
10838 | target->adjusted_gp_value(object), | |
10839 | r_addend, extract_addend, | |
10840 | calculate_only, | |
10841 | &calculated_value); | |
10842 | break; | |
10843 | case elfcpp::R_MIPS_GOT_HI16: | |
10844 | case elfcpp::R_MIPS_CALL_HI16: | |
10845 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
10846 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
10847 | if (gsym != NULL) | |
10848 | got_offset = target->got_section()->got_offset(gsym, | |
10849 | GOT_TYPE_STANDARD, | |
10850 | object); | |
10851 | else | |
10852 | got_offset = target->got_section()->got_offset(r_sym, | |
10853 | GOT_TYPE_STANDARD, | |
10854 | object, r_addend); | |
10855 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
10856 | reloc_status = Reloc_funcs::relgot_hi16(view, gp_offset, | |
10857 | calculate_only, | |
10858 | &calculated_value); | |
10859 | update_got_entry = changed_symbol_value; | |
10860 | break; | |
9810d34d | 10861 | |
47a9f4fc VR |
10862 | case elfcpp::R_MIPS_GOT_LO16: |
10863 | case elfcpp::R_MIPS_CALL_LO16: | |
10864 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
10865 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
10866 | if (gsym != NULL) | |
10867 | got_offset = target->got_section()->got_offset(gsym, | |
10868 | GOT_TYPE_STANDARD, | |
10869 | object); | |
10870 | else | |
10871 | got_offset = target->got_section()->got_offset(r_sym, | |
10872 | GOT_TYPE_STANDARD, | |
10873 | object, r_addend); | |
10874 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
10875 | reloc_status = Reloc_funcs::relgot_lo16(view, gp_offset, | |
10876 | calculate_only, | |
10877 | &calculated_value); | |
10878 | update_got_entry = changed_symbol_value; | |
10879 | break; | |
10880 | ||
10881 | case elfcpp::R_MIPS_GOT_DISP: | |
10882 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
10883 | case elfcpp::R_MIPS_EH: | |
10884 | if (gsym != NULL) | |
10885 | got_offset = target->got_section()->got_offset(gsym, | |
10886 | GOT_TYPE_STANDARD, | |
10887 | object); | |
10888 | else | |
10889 | got_offset = target->got_section()->got_offset(r_sym, | |
10890 | GOT_TYPE_STANDARD, | |
10891 | object, r_addend); | |
10892 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
10893 | if (eh_reloc(r_types[i])) | |
10894 | reloc_status = Reloc_funcs::releh(view, gp_offset, | |
10895 | calculate_only, | |
10896 | &calculated_value); | |
10897 | else | |
10898 | reloc_status = Reloc_funcs::relgot(view, gp_offset, | |
10899 | calculate_only, | |
10900 | &calculated_value); | |
10901 | break; | |
10902 | case elfcpp::R_MIPS_CALL16: | |
10903 | case elfcpp::R_MIPS16_CALL16: | |
10904 | case elfcpp::R_MICROMIPS_CALL16: | |
10905 | gold_assert(gsym != NULL); | |
9810d34d SS |
10906 | got_offset = target->got_section()->got_offset(gsym, |
10907 | GOT_TYPE_STANDARD, | |
10908 | object); | |
10909 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
47a9f4fc VR |
10910 | reloc_status = Reloc_funcs::relgot(view, gp_offset, |
10911 | calculate_only, &calculated_value); | |
10912 | // TODO(sasa): We should also initialize update_got_entry | |
10913 | // in other place swhere relgot is called. | |
10914 | update_got_entry = changed_symbol_value; | |
10915 | break; | |
9810d34d | 10916 | |
47a9f4fc VR |
10917 | case elfcpp::R_MIPS_GOT16: |
10918 | case elfcpp::R_MIPS16_GOT16: | |
10919 | case elfcpp::R_MICROMIPS_GOT16: | |
10920 | if (gsym != NULL) | |
10921 | { | |
10922 | got_offset = target->got_section()->got_offset(gsym, | |
10923 | GOT_TYPE_STANDARD, | |
10924 | object); | |
10925 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
10926 | reloc_status = Reloc_funcs::relgot(view, gp_offset, | |
10927 | calculate_only, | |
10928 | &calculated_value); | |
10929 | } | |
10930 | else | |
10931 | { | |
10932 | if (rel_type == elfcpp::SHT_RELA) | |
10933 | reloc_status = Reloc_funcs::do_relgot16_local(view, object, | |
10934 | psymval, r_addend, | |
10935 | extract_addend, 0, | |
10936 | target, | |
10937 | calculate_only, | |
10938 | &calculated_value); | |
10939 | else if (rel_type == elfcpp::SHT_REL) | |
10940 | reloc_status = Reloc_funcs::relgot16_local(view, object, | |
10941 | psymval, r_addend, | |
10942 | extract_addend, | |
10943 | r_types[i], r_sym); | |
10944 | else | |
10945 | gold_unreachable(); | |
10946 | } | |
10947 | update_got_entry = changed_symbol_value; | |
10948 | break; | |
9810d34d | 10949 | |
47a9f4fc VR |
10950 | case elfcpp::R_MIPS_TLS_GD: |
10951 | case elfcpp::R_MIPS16_TLS_GD: | |
10952 | case elfcpp::R_MICROMIPS_TLS_GD: | |
10953 | if (gsym != NULL) | |
10954 | got_offset = target->got_section()->got_offset(gsym, | |
10955 | GOT_TYPE_TLS_PAIR, | |
10956 | object); | |
10957 | else | |
10958 | got_offset = target->got_section()->got_offset(r_sym, | |
10959 | GOT_TYPE_TLS_PAIR, | |
10960 | object, r_addend); | |
10961 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
10962 | reloc_status = Reloc_funcs::relgot(view, gp_offset, calculate_only, | |
10963 | &calculated_value); | |
10964 | break; | |
9810d34d | 10965 | |
47a9f4fc VR |
10966 | case elfcpp::R_MIPS_TLS_GOTTPREL: |
10967 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
10968 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
10969 | if (gsym != NULL) | |
10970 | got_offset = target->got_section()->got_offset(gsym, | |
10971 | GOT_TYPE_TLS_OFFSET, | |
10972 | object); | |
10973 | else | |
10974 | got_offset = target->got_section()->got_offset(r_sym, | |
10975 | GOT_TYPE_TLS_OFFSET, | |
10976 | object, r_addend); | |
10977 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
10978 | reloc_status = Reloc_funcs::relgot(view, gp_offset, calculate_only, | |
10979 | &calculated_value); | |
10980 | break; | |
9810d34d | 10981 | |
47a9f4fc VR |
10982 | case elfcpp::R_MIPS_TLS_LDM: |
10983 | case elfcpp::R_MIPS16_TLS_LDM: | |
10984 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
10985 | // Relocate the field with the offset of the GOT entry for | |
10986 | // the module index. | |
10987 | got_offset = target->got_section()->tls_ldm_offset(object); | |
10988 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
10989 | reloc_status = Reloc_funcs::relgot(view, gp_offset, calculate_only, | |
10990 | &calculated_value); | |
10991 | break; | |
9810d34d | 10992 | |
47a9f4fc VR |
10993 | case elfcpp::R_MIPS_GOT_PAGE: |
10994 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
10995 | reloc_status = Reloc_funcs::relgotpage(target, view, object, psymval, | |
10996 | r_addend, extract_addend, | |
10997 | calculate_only, | |
10998 | &calculated_value); | |
10999 | break; | |
9810d34d | 11000 | |
47a9f4fc VR |
11001 | case elfcpp::R_MIPS_GOT_OFST: |
11002 | case elfcpp::R_MICROMIPS_GOT_OFST: | |
11003 | reloc_status = Reloc_funcs::relgotofst(target, view, object, psymval, | |
11004 | r_addend, extract_addend, | |
11005 | local, calculate_only, | |
11006 | &calculated_value); | |
11007 | break; | |
9810d34d | 11008 | |
47a9f4fc VR |
11009 | case elfcpp::R_MIPS_JALR: |
11010 | case elfcpp::R_MICROMIPS_JALR: | |
11011 | // This relocation is only a hint. In some cases, we optimize | |
11012 | // it into a bal instruction. But we don't try to optimize | |
11013 | // when the symbol does not resolve locally. | |
11014 | if (gsym == NULL | |
11015 | || symbol_calls_local(gsym, gsym->has_dynsym_index())) | |
11016 | reloc_status = Reloc_funcs::reljalr(view, object, psymval, address, | |
11017 | r_addend, extract_addend, | |
11018 | cross_mode_jump, r_types[i], | |
11019 | target->jalr_to_bal(), | |
11020 | target->jr_to_b(), | |
11021 | calculate_only, | |
11022 | &calculated_value); | |
11023 | break; | |
9810d34d | 11024 | |
47a9f4fc VR |
11025 | case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
11026 | case elfcpp::R_MIPS16_TLS_DTPREL_HI16: | |
11027 | case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16: | |
11028 | reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval, | |
11029 | elfcpp::DTP_OFFSET, r_addend, | |
11030 | extract_addend, calculate_only, | |
11031 | &calculated_value); | |
11032 | break; | |
11033 | case elfcpp::R_MIPS_TLS_DTPREL_LO16: | |
11034 | case elfcpp::R_MIPS16_TLS_DTPREL_LO16: | |
11035 | case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16: | |
11036 | reloc_status = Reloc_funcs::tlsrello16(view, object, psymval, | |
11037 | elfcpp::DTP_OFFSET, r_addend, | |
11038 | extract_addend, calculate_only, | |
11039 | &calculated_value); | |
11040 | break; | |
11041 | case elfcpp::R_MIPS_TLS_DTPREL32: | |
11042 | case elfcpp::R_MIPS_TLS_DTPREL64: | |
11043 | reloc_status = Reloc_funcs::tlsrel32(view, object, psymval, | |
11044 | elfcpp::DTP_OFFSET, r_addend, | |
11045 | extract_addend, calculate_only, | |
11046 | &calculated_value); | |
11047 | break; | |
11048 | case elfcpp::R_MIPS_TLS_TPREL_HI16: | |
11049 | case elfcpp::R_MIPS16_TLS_TPREL_HI16: | |
11050 | case elfcpp::R_MICROMIPS_TLS_TPREL_HI16: | |
11051 | reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval, | |
11052 | elfcpp::TP_OFFSET, r_addend, | |
11053 | extract_addend, calculate_only, | |
11054 | &calculated_value); | |
11055 | break; | |
11056 | case elfcpp::R_MIPS_TLS_TPREL_LO16: | |
11057 | case elfcpp::R_MIPS16_TLS_TPREL_LO16: | |
11058 | case elfcpp::R_MICROMIPS_TLS_TPREL_LO16: | |
11059 | reloc_status = Reloc_funcs::tlsrello16(view, object, psymval, | |
11060 | elfcpp::TP_OFFSET, r_addend, | |
11061 | extract_addend, calculate_only, | |
11062 | &calculated_value); | |
11063 | break; | |
11064 | case elfcpp::R_MIPS_TLS_TPREL32: | |
11065 | case elfcpp::R_MIPS_TLS_TPREL64: | |
11066 | reloc_status = Reloc_funcs::tlsrel32(view, object, psymval, | |
11067 | elfcpp::TP_OFFSET, r_addend, | |
11068 | extract_addend, calculate_only, | |
11069 | &calculated_value); | |
11070 | break; | |
11071 | case elfcpp::R_MIPS_SUB: | |
11072 | case elfcpp::R_MICROMIPS_SUB: | |
11073 | reloc_status = Reloc_funcs::relsub(view, object, psymval, r_addend, | |
11074 | extract_addend, | |
11075 | calculate_only, &calculated_value); | |
11076 | break; | |
11077 | default: | |
11078 | gold_error_at_location(relinfo, relnum, r_offset, | |
11079 | _("unsupported reloc %u"), r_types[i]); | |
11080 | break; | |
11081 | } | |
11082 | ||
11083 | if (update_got_entry) | |
11084 | { | |
11085 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
11086 | if (mips_sym != NULL && mips_sym->get_applied_secondary_got_fixup()) | |
11087 | got->update_got_entry(got->get_primary_got_offset(mips_sym), | |
11088 | psymval->value(object, 0)); | |
11089 | else | |
11090 | got->update_got_entry(got_offset, psymval->value(object, 0)); | |
11091 | } | |
11092 | ||
11093 | r_addend = calculated_value; | |
9810d34d SS |
11094 | } |
11095 | ||
47a9f4fc VR |
11096 | bool jal_shuffle = jal_reloc(r_type) ? !parameters->options().relocatable() |
11097 | : false; | |
11098 | Reloc_funcs::mips_reloc_shuffle(view, r_type, jal_shuffle); | |
11099 | ||
9810d34d SS |
11100 | // Report any errors. |
11101 | switch (reloc_status) | |
11102 | { | |
11103 | case Reloc_funcs::STATUS_OKAY: | |
11104 | break; | |
11105 | case Reloc_funcs::STATUS_OVERFLOW: | |
11106 | gold_error_at_location(relinfo, relnum, r_offset, | |
11107 | _("relocation overflow")); | |
11108 | break; | |
11109 | case Reloc_funcs::STATUS_BAD_RELOC: | |
11110 | gold_error_at_location(relinfo, relnum, r_offset, | |
11111 | _("unexpected opcode while processing relocation")); | |
11112 | break; | |
11113 | default: | |
11114 | gold_unreachable(); | |
11115 | } | |
11116 | ||
11117 | return true; | |
11118 | } | |
11119 | ||
9810d34d SS |
11120 | // Get the Reference_flags for a particular relocation. |
11121 | ||
11122 | template<int size, bool big_endian> | |
11123 | int | |
11124 | Target_mips<size, big_endian>::Scan::get_reference_flags( | |
11125 | unsigned int r_type) | |
11126 | { | |
11127 | switch (r_type) | |
11128 | { | |
11129 | case elfcpp::R_MIPS_NONE: | |
11130 | // No symbol reference. | |
11131 | return 0; | |
11132 | ||
11133 | case elfcpp::R_MIPS_16: | |
11134 | case elfcpp::R_MIPS_32: | |
11135 | case elfcpp::R_MIPS_64: | |
11136 | case elfcpp::R_MIPS_HI16: | |
11137 | case elfcpp::R_MIPS_LO16: | |
11138 | case elfcpp::R_MIPS16_HI16: | |
11139 | case elfcpp::R_MIPS16_LO16: | |
11140 | case elfcpp::R_MICROMIPS_HI16: | |
11141 | case elfcpp::R_MICROMIPS_LO16: | |
11142 | return Symbol::ABSOLUTE_REF; | |
11143 | ||
11144 | case elfcpp::R_MIPS_26: | |
11145 | case elfcpp::R_MIPS16_26: | |
11146 | case elfcpp::R_MICROMIPS_26_S1: | |
11147 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; | |
11148 | ||
11149 | case elfcpp::R_MIPS_GPREL32: | |
11150 | case elfcpp::R_MIPS_GPREL16: | |
11151 | case elfcpp::R_MIPS_REL32: | |
11152 | case elfcpp::R_MIPS16_GPREL: | |
11153 | return Symbol::RELATIVE_REF; | |
11154 | ||
11155 | case elfcpp::R_MIPS_PC16: | |
11156 | case elfcpp::R_MIPS_PC32: | |
11157 | case elfcpp::R_MIPS_JALR: | |
11158 | case elfcpp::R_MICROMIPS_JALR: | |
11159 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; | |
11160 | ||
11161 | case elfcpp::R_MIPS_GOT16: | |
11162 | case elfcpp::R_MIPS_CALL16: | |
11163 | case elfcpp::R_MIPS_GOT_DISP: | |
11164 | case elfcpp::R_MIPS_GOT_HI16: | |
11165 | case elfcpp::R_MIPS_GOT_LO16: | |
11166 | case elfcpp::R_MIPS_CALL_HI16: | |
11167 | case elfcpp::R_MIPS_CALL_LO16: | |
11168 | case elfcpp::R_MIPS_LITERAL: | |
11169 | case elfcpp::R_MIPS_GOT_PAGE: | |
11170 | case elfcpp::R_MIPS_GOT_OFST: | |
11171 | case elfcpp::R_MIPS16_GOT16: | |
11172 | case elfcpp::R_MIPS16_CALL16: | |
11173 | case elfcpp::R_MICROMIPS_GOT16: | |
11174 | case elfcpp::R_MICROMIPS_CALL16: | |
11175 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
11176 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
11177 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
11178 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
47a9f4fc | 11179 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
11180 | // Absolute in GOT. |
11181 | return Symbol::RELATIVE_REF; | |
11182 | ||
11183 | case elfcpp::R_MIPS_TLS_DTPMOD32: | |
11184 | case elfcpp::R_MIPS_TLS_DTPREL32: | |
11185 | case elfcpp::R_MIPS_TLS_DTPMOD64: | |
11186 | case elfcpp::R_MIPS_TLS_DTPREL64: | |
11187 | case elfcpp::R_MIPS_TLS_GD: | |
11188 | case elfcpp::R_MIPS_TLS_LDM: | |
11189 | case elfcpp::R_MIPS_TLS_DTPREL_HI16: | |
11190 | case elfcpp::R_MIPS_TLS_DTPREL_LO16: | |
11191 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
11192 | case elfcpp::R_MIPS_TLS_TPREL32: | |
11193 | case elfcpp::R_MIPS_TLS_TPREL64: | |
11194 | case elfcpp::R_MIPS_TLS_TPREL_HI16: | |
11195 | case elfcpp::R_MIPS_TLS_TPREL_LO16: | |
11196 | case elfcpp::R_MIPS16_TLS_GD: | |
11197 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
11198 | case elfcpp::R_MICROMIPS_TLS_GD: | |
11199 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
11200 | case elfcpp::R_MICROMIPS_TLS_TPREL_HI16: | |
11201 | case elfcpp::R_MICROMIPS_TLS_TPREL_LO16: | |
11202 | return Symbol::TLS_REF; | |
11203 | ||
11204 | case elfcpp::R_MIPS_COPY: | |
11205 | case elfcpp::R_MIPS_JUMP_SLOT: | |
11206 | default: | |
11207 | gold_unreachable(); | |
11208 | // Not expected. We will give an error later. | |
11209 | return 0; | |
11210 | } | |
11211 | } | |
11212 | ||
11213 | // Report an unsupported relocation against a local symbol. | |
11214 | ||
11215 | template<int size, bool big_endian> | |
11216 | void | |
11217 | Target_mips<size, big_endian>::Scan::unsupported_reloc_local( | |
11218 | Sized_relobj_file<size, big_endian>* object, | |
11219 | unsigned int r_type) | |
11220 | { | |
11221 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
11222 | object->name().c_str(), r_type); | |
11223 | } | |
11224 | ||
11225 | // Report an unsupported relocation against a global symbol. | |
11226 | ||
11227 | template<int size, bool big_endian> | |
11228 | void | |
11229 | Target_mips<size, big_endian>::Scan::unsupported_reloc_global( | |
11230 | Sized_relobj_file<size, big_endian>* object, | |
11231 | unsigned int r_type, | |
11232 | Symbol* gsym) | |
11233 | { | |
11234 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
11235 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
11236 | } | |
11237 | ||
11238 | // Return printable name for ABI. | |
11239 | template<int size, bool big_endian> | |
11240 | const char* | |
01b84e25 | 11241 | Target_mips<size, big_endian>::elf_mips_abi_name(elfcpp::Elf_Word e_flags) |
9810d34d SS |
11242 | { |
11243 | switch (e_flags & elfcpp::EF_MIPS_ABI) | |
11244 | { | |
11245 | case 0: | |
11246 | if ((e_flags & elfcpp::EF_MIPS_ABI2) != 0) | |
11247 | return "N32"; | |
01b84e25 | 11248 | else if (size == 64) |
9810d34d SS |
11249 | return "64"; |
11250 | else | |
11251 | return "none"; | |
11252 | case elfcpp::E_MIPS_ABI_O32: | |
11253 | return "O32"; | |
11254 | case elfcpp::E_MIPS_ABI_O64: | |
11255 | return "O64"; | |
11256 | case elfcpp::E_MIPS_ABI_EABI32: | |
11257 | return "EABI32"; | |
11258 | case elfcpp::E_MIPS_ABI_EABI64: | |
11259 | return "EABI64"; | |
11260 | default: | |
11261 | return "unknown abi"; | |
11262 | } | |
11263 | } | |
11264 | ||
11265 | template<int size, bool big_endian> | |
11266 | const char* | |
11267 | Target_mips<size, big_endian>::elf_mips_mach_name(elfcpp::Elf_Word e_flags) | |
11268 | { | |
11269 | switch (e_flags & elfcpp::EF_MIPS_MACH) | |
11270 | { | |
11271 | case elfcpp::E_MIPS_MACH_3900: | |
11272 | return "mips:3900"; | |
11273 | case elfcpp::E_MIPS_MACH_4010: | |
11274 | return "mips:4010"; | |
11275 | case elfcpp::E_MIPS_MACH_4100: | |
11276 | return "mips:4100"; | |
11277 | case elfcpp::E_MIPS_MACH_4111: | |
11278 | return "mips:4111"; | |
11279 | case elfcpp::E_MIPS_MACH_4120: | |
11280 | return "mips:4120"; | |
11281 | case elfcpp::E_MIPS_MACH_4650: | |
11282 | return "mips:4650"; | |
11283 | case elfcpp::E_MIPS_MACH_5400: | |
11284 | return "mips:5400"; | |
11285 | case elfcpp::E_MIPS_MACH_5500: | |
11286 | return "mips:5500"; | |
11287 | case elfcpp::E_MIPS_MACH_SB1: | |
11288 | return "mips:sb1"; | |
11289 | case elfcpp::E_MIPS_MACH_9000: | |
11290 | return "mips:9000"; | |
11291 | case elfcpp::E_MIPS_MACH_LS2E: | |
11292 | return "mips:loongson-2e"; | |
11293 | case elfcpp::E_MIPS_MACH_LS2F: | |
11294 | return "mips:loongson-2f"; | |
11295 | case elfcpp::E_MIPS_MACH_LS3A: | |
11296 | return "mips:loongson-3a"; | |
11297 | case elfcpp::E_MIPS_MACH_OCTEON: | |
11298 | return "mips:octeon"; | |
11299 | case elfcpp::E_MIPS_MACH_OCTEON2: | |
11300 | return "mips:octeon2"; | |
11301 | case elfcpp::E_MIPS_MACH_XLR: | |
11302 | return "mips:xlr"; | |
11303 | default: | |
11304 | switch (e_flags & elfcpp::EF_MIPS_ARCH) | |
11305 | { | |
11306 | default: | |
11307 | case elfcpp::E_MIPS_ARCH_1: | |
11308 | return "mips:3000"; | |
11309 | ||
11310 | case elfcpp::E_MIPS_ARCH_2: | |
11311 | return "mips:6000"; | |
11312 | ||
11313 | case elfcpp::E_MIPS_ARCH_3: | |
11314 | return "mips:4000"; | |
11315 | ||
11316 | case elfcpp::E_MIPS_ARCH_4: | |
11317 | return "mips:8000"; | |
11318 | ||
11319 | case elfcpp::E_MIPS_ARCH_5: | |
11320 | return "mips:mips5"; | |
11321 | ||
11322 | case elfcpp::E_MIPS_ARCH_32: | |
11323 | return "mips:isa32"; | |
11324 | ||
11325 | case elfcpp::E_MIPS_ARCH_64: | |
11326 | return "mips:isa64"; | |
11327 | ||
11328 | case elfcpp::E_MIPS_ARCH_32R2: | |
11329 | return "mips:isa32r2"; | |
11330 | ||
11331 | case elfcpp::E_MIPS_ARCH_64R2: | |
11332 | return "mips:isa64r2"; | |
11333 | } | |
11334 | } | |
11335 | return "unknown CPU"; | |
11336 | } | |
11337 | ||
11338 | template<int size, bool big_endian> | |
62661c93 | 11339 | const Target::Target_info Target_mips<size, big_endian>::mips_info = |
9810d34d SS |
11340 | { |
11341 | size, // size | |
11342 | big_endian, // is_big_endian | |
11343 | elfcpp::EM_MIPS, // machine_code | |
11344 | true, // has_make_symbol | |
11345 | false, // has_resolve | |
11346 | false, // has_code_fill | |
11347 | true, // is_default_stack_executable | |
11348 | false, // can_icf_inline_merge_sections | |
11349 | '\0', // wrap_char | |
47a9f4fc | 11350 | size == 32 ? "/lib/ld.so.1" : "/lib64/ld.so.1", // dynamic_linker |
9810d34d SS |
11351 | 0x400000, // default_text_segment_address |
11352 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
11353 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) | |
11354 | false, // isolate_execinstr | |
11355 | 0, // rosegment_gap | |
11356 | elfcpp::SHN_UNDEF, // small_common_shndx | |
11357 | elfcpp::SHN_UNDEF, // large_common_shndx | |
11358 | 0, // small_common_section_flags | |
11359 | 0, // large_common_section_flags | |
11360 | NULL, // attributes_section | |
11361 | NULL, // attributes_vendor | |
8d9743bd MK |
11362 | "__start", // entry_symbol_name |
11363 | 32, // hash_entry_size | |
9810d34d SS |
11364 | }; |
11365 | ||
62661c93 SS |
11366 | template<int size, bool big_endian> |
11367 | class Target_mips_nacl : public Target_mips<size, big_endian> | |
11368 | { | |
11369 | public: | |
11370 | Target_mips_nacl() | |
11371 | : Target_mips<size, big_endian>(&mips_nacl_info) | |
11372 | { } | |
11373 | ||
11374 | private: | |
11375 | static const Target::Target_info mips_nacl_info; | |
11376 | }; | |
11377 | ||
11378 | template<int size, bool big_endian> | |
11379 | const Target::Target_info Target_mips_nacl<size, big_endian>::mips_nacl_info = | |
11380 | { | |
11381 | size, // size | |
11382 | big_endian, // is_big_endian | |
11383 | elfcpp::EM_MIPS, // machine_code | |
11384 | true, // has_make_symbol | |
11385 | false, // has_resolve | |
11386 | false, // has_code_fill | |
11387 | true, // is_default_stack_executable | |
11388 | false, // can_icf_inline_merge_sections | |
11389 | '\0', // wrap_char | |
11390 | "/lib/ld.so.1", // dynamic_linker | |
11391 | 0x20000, // default_text_segment_address | |
11392 | 0x10000, // abi_pagesize (overridable by -z max-page-size) | |
11393 | 0x10000, // common_pagesize (overridable by -z common-page-size) | |
11394 | true, // isolate_execinstr | |
11395 | 0x10000000, // rosegment_gap | |
11396 | elfcpp::SHN_UNDEF, // small_common_shndx | |
11397 | elfcpp::SHN_UNDEF, // large_common_shndx | |
11398 | 0, // small_common_section_flags | |
11399 | 0, // large_common_section_flags | |
11400 | NULL, // attributes_section | |
11401 | NULL, // attributes_vendor | |
8d9743bd MK |
11402 | "_start", // entry_symbol_name |
11403 | 32, // hash_entry_size | |
62661c93 SS |
11404 | }; |
11405 | ||
11406 | // Target selector for Mips. Note this is never instantiated directly. | |
11407 | // It's only used in Target_selector_mips_nacl, below. | |
9810d34d SS |
11408 | |
11409 | template<int size, bool big_endian> | |
11410 | class Target_selector_mips : public Target_selector | |
11411 | { | |
11412 | public: | |
11413 | Target_selector_mips() | |
11414 | : Target_selector(elfcpp::EM_MIPS, size, big_endian, | |
11415 | (size == 64 ? | |
11416 | (big_endian ? "elf64-tradbigmips" : "elf64-tradlittlemips") : | |
11417 | (big_endian ? "elf32-tradbigmips" : "elf32-tradlittlemips")), | |
11418 | (size == 64 ? | |
47a9f4fc VR |
11419 | (big_endian ? "elf64btsmip" : "elf64ltsmip") : |
11420 | (big_endian ? "elf32btsmip" : "elf32ltsmip"))) | |
9810d34d SS |
11421 | { } |
11422 | ||
11423 | Target* do_instantiate_target() | |
11424 | { return new Target_mips<size, big_endian>(); } | |
11425 | }; | |
11426 | ||
62661c93 SS |
11427 | template<int size, bool big_endian> |
11428 | class Target_selector_mips_nacl | |
11429 | : public Target_selector_nacl<Target_selector_mips<size, big_endian>, | |
11430 | Target_mips_nacl<size, big_endian> > | |
11431 | { | |
11432 | public: | |
11433 | Target_selector_mips_nacl() | |
11434 | : Target_selector_nacl<Target_selector_mips<size, big_endian>, | |
11435 | Target_mips_nacl<size, big_endian> >( | |
11436 | // NaCl currently supports only MIPS32 little-endian. | |
11437 | "mipsel", "elf32-tradlittlemips-nacl", "elf32-tradlittlemips-nacl") | |
11438 | { } | |
11439 | }; | |
9810d34d | 11440 | |
62661c93 SS |
11441 | Target_selector_mips_nacl<32, true> target_selector_mips32; |
11442 | Target_selector_mips_nacl<32, false> target_selector_mips32el; | |
11443 | Target_selector_mips_nacl<64, true> target_selector_mips64; | |
11444 | Target_selector_mips_nacl<64, false> target_selector_mips64el; | |
9810d34d SS |
11445 | |
11446 | } // End anonymous namespace. |