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9810d34d SS |
1 | // mips.cc -- mips target support for gold. |
2 | ||
2571583a | 3 | // Copyright (C) 2011-2017 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" | |
b52717c0 | 47 | #include "attributes.h" |
62661c93 | 48 | #include "nacl.h" |
9810d34d SS |
49 | |
50 | namespace | |
51 | { | |
52 | using namespace gold; | |
53 | ||
54 | template<int size, bool big_endian> | |
55 | class Mips_output_data_plt; | |
56 | ||
57 | template<int size, bool big_endian> | |
58 | class Mips_output_data_got; | |
59 | ||
60 | template<int size, bool big_endian> | |
61 | class Target_mips; | |
62 | ||
63 | template<int size, bool big_endian> | |
64 | class Mips_output_section_reginfo; | |
65 | ||
1728969e VR |
66 | template<int size, bool big_endian> |
67 | class Mips_output_section_options; | |
68 | ||
9810d34d SS |
69 | template<int size, bool big_endian> |
70 | class Mips_output_data_la25_stub; | |
71 | ||
72 | template<int size, bool big_endian> | |
73 | class Mips_output_data_mips_stubs; | |
74 | ||
75 | template<int size> | |
76 | class Mips_symbol; | |
77 | ||
78 | template<int size, bool big_endian> | |
79 | class Mips_got_info; | |
80 | ||
81 | template<int size, bool big_endian> | |
82 | class Mips_relobj; | |
83 | ||
84 | class Mips16_stub_section_base; | |
85 | ||
86 | template<int size, bool big_endian> | |
87 | class Mips16_stub_section; | |
88 | ||
89 | // The ABI says that every symbol used by dynamic relocations must have | |
90 | // a global GOT entry. Among other things, this provides the dynamic | |
91 | // linker with a free, directly-indexed cache. The GOT can therefore | |
92 | // contain symbols that are not referenced by GOT relocations themselves | |
93 | // (in other words, it may have symbols that are not referenced by things | |
94 | // like R_MIPS_GOT16 and R_MIPS_GOT_PAGE). | |
95 | ||
96 | // GOT relocations are less likely to overflow if we put the associated | |
97 | // GOT entries towards the beginning. We therefore divide the global | |
98 | // GOT entries into two areas: "normal" and "reloc-only". Entries in | |
99 | // the first area can be used for both dynamic relocations and GP-relative | |
100 | // accesses, while those in the "reloc-only" area are for dynamic | |
101 | // relocations only. | |
102 | ||
103 | // These GGA_* ("Global GOT Area") values are organised so that lower | |
104 | // values are more general than higher values. Also, non-GGA_NONE | |
105 | // values are ordered by the position of the area in the GOT. | |
106 | ||
107 | enum Global_got_area | |
108 | { | |
109 | GGA_NORMAL = 0, | |
110 | GGA_RELOC_ONLY = 1, | |
111 | GGA_NONE = 2 | |
112 | }; | |
113 | ||
114 | // The types of GOT entries needed for this platform. | |
115 | // These values are exposed to the ABI in an incremental link. | |
116 | // Do not renumber existing values without changing the version | |
117 | // number of the .gnu_incremental_inputs section. | |
118 | enum Got_type | |
119 | { | |
120 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
121 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
122 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
123 | ||
124 | // GOT entries for multi-GOT. We support up to 1024 GOTs in multi-GOT links. | |
125 | GOT_TYPE_STANDARD_MULTIGOT = 3, | |
126 | GOT_TYPE_TLS_OFFSET_MULTIGOT = GOT_TYPE_STANDARD_MULTIGOT + 1024, | |
127 | GOT_TYPE_TLS_PAIR_MULTIGOT = GOT_TYPE_TLS_OFFSET_MULTIGOT + 1024 | |
128 | }; | |
129 | ||
130 | // TLS type of GOT entry. | |
131 | enum Got_tls_type | |
132 | { | |
133 | GOT_TLS_NONE = 0, | |
134 | GOT_TLS_GD = 1, | |
135 | GOT_TLS_LDM = 2, | |
136 | GOT_TLS_IE = 4 | |
137 | }; | |
138 | ||
47a9f4fc VR |
139 | // Values found in the r_ssym field of a relocation entry. |
140 | enum Special_relocation_symbol | |
141 | { | |
142 | RSS_UNDEF = 0, // None - value is zero. | |
143 | RSS_GP = 1, // Value of GP. | |
144 | RSS_GP0 = 2, // Value of GP in object being relocated. | |
145 | RSS_LOC = 3 // Address of location being relocated. | |
146 | }; | |
147 | ||
148 | // Whether the section is readonly. | |
149 | static inline bool | |
150 | is_readonly_section(Output_section* output_section) | |
151 | { | |
152 | elfcpp::Elf_Xword section_flags = output_section->flags(); | |
153 | elfcpp::Elf_Word section_type = output_section->type(); | |
154 | ||
155 | if (section_type == elfcpp::SHT_NOBITS) | |
156 | return false; | |
157 | ||
158 | if (section_flags & elfcpp::SHF_WRITE) | |
159 | return false; | |
160 | ||
161 | return true; | |
162 | } | |
163 | ||
9810d34d SS |
164 | // Return TRUE if a relocation of type R_TYPE from OBJECT might |
165 | // require an la25 stub. See also local_pic_function, which determines | |
166 | // whether the destination function ever requires a stub. | |
167 | template<int size, bool big_endian> | |
168 | static inline bool | |
169 | relocation_needs_la25_stub(Mips_relobj<size, big_endian>* object, | |
170 | unsigned int r_type, bool target_is_16_bit_code) | |
171 | { | |
172 | // We specifically ignore branches and jumps from EF_PIC objects, | |
173 | // where the onus is on the compiler or programmer to perform any | |
174 | // necessary initialization of $25. Sometimes such initialization | |
175 | // is unnecessary; for example, -mno-shared functions do not use | |
176 | // the incoming value of $25, and may therefore be called directly. | |
177 | if (object->is_pic()) | |
178 | return false; | |
179 | ||
180 | switch (r_type) | |
181 | { | |
182 | case elfcpp::R_MIPS_26: | |
183 | case elfcpp::R_MIPS_PC16: | |
f5b11759 VR |
184 | case elfcpp::R_MIPS_PC21_S2: |
185 | case elfcpp::R_MIPS_PC26_S2: | |
9810d34d SS |
186 | case elfcpp::R_MICROMIPS_26_S1: |
187 | case elfcpp::R_MICROMIPS_PC7_S1: | |
188 | case elfcpp::R_MICROMIPS_PC10_S1: | |
189 | case elfcpp::R_MICROMIPS_PC16_S1: | |
190 | case elfcpp::R_MICROMIPS_PC23_S2: | |
191 | return true; | |
192 | ||
193 | case elfcpp::R_MIPS16_26: | |
194 | return !target_is_16_bit_code; | |
195 | ||
196 | default: | |
197 | return false; | |
198 | } | |
199 | } | |
200 | ||
201 | // Return true if SYM is a locally-defined PIC function, in the sense | |
202 | // that it or its fn_stub might need $25 to be valid on entry. | |
203 | // Note that MIPS16 functions set up $gp using PC-relative instructions, | |
204 | // so they themselves never need $25 to be valid. Only non-MIPS16 | |
205 | // entry points are of interest here. | |
206 | template<int size, bool big_endian> | |
207 | static inline bool | |
208 | local_pic_function(Mips_symbol<size>* sym) | |
209 | { | |
210 | bool def_regular = (sym->source() == Symbol::FROM_OBJECT | |
211 | && !sym->object()->is_dynamic() | |
212 | && !sym->is_undefined()); | |
213 | ||
214 | if (sym->is_defined() && def_regular) | |
215 | { | |
216 | Mips_relobj<size, big_endian>* object = | |
217 | static_cast<Mips_relobj<size, big_endian>*>(sym->object()); | |
218 | ||
219 | if ((object->is_pic() || sym->is_pic()) | |
220 | && (!sym->is_mips16() | |
221 | || (sym->has_mips16_fn_stub() && sym->need_fn_stub()))) | |
222 | return true; | |
223 | } | |
224 | return false; | |
225 | } | |
226 | ||
227 | static inline bool | |
228 | hi16_reloc(int r_type) | |
229 | { | |
230 | return (r_type == elfcpp::R_MIPS_HI16 | |
231 | || r_type == elfcpp::R_MIPS16_HI16 | |
f5b11759 VR |
232 | || r_type == elfcpp::R_MICROMIPS_HI16 |
233 | || r_type == elfcpp::R_MIPS_PCHI16); | |
9810d34d SS |
234 | } |
235 | ||
236 | static inline bool | |
237 | lo16_reloc(int r_type) | |
238 | { | |
239 | return (r_type == elfcpp::R_MIPS_LO16 | |
240 | || r_type == elfcpp::R_MIPS16_LO16 | |
f5b11759 VR |
241 | || r_type == elfcpp::R_MICROMIPS_LO16 |
242 | || r_type == elfcpp::R_MIPS_PCLO16); | |
9810d34d SS |
243 | } |
244 | ||
245 | static inline bool | |
246 | got16_reloc(unsigned int r_type) | |
247 | { | |
248 | return (r_type == elfcpp::R_MIPS_GOT16 | |
249 | || r_type == elfcpp::R_MIPS16_GOT16 | |
250 | || r_type == elfcpp::R_MICROMIPS_GOT16); | |
251 | } | |
252 | ||
253 | static inline bool | |
254 | call_lo16_reloc(unsigned int r_type) | |
255 | { | |
256 | return (r_type == elfcpp::R_MIPS_CALL_LO16 | |
257 | || r_type == elfcpp::R_MICROMIPS_CALL_LO16); | |
258 | } | |
259 | ||
260 | static inline bool | |
261 | got_lo16_reloc(unsigned int r_type) | |
262 | { | |
263 | return (r_type == elfcpp::R_MIPS_GOT_LO16 | |
264 | || r_type == elfcpp::R_MICROMIPS_GOT_LO16); | |
265 | } | |
266 | ||
47a9f4fc VR |
267 | static inline bool |
268 | eh_reloc(unsigned int r_type) | |
269 | { | |
270 | return (r_type == elfcpp::R_MIPS_EH); | |
271 | } | |
272 | ||
9810d34d SS |
273 | static inline bool |
274 | got_disp_reloc(unsigned int r_type) | |
275 | { | |
276 | return (r_type == elfcpp::R_MIPS_GOT_DISP | |
277 | || r_type == elfcpp::R_MICROMIPS_GOT_DISP); | |
278 | } | |
279 | ||
280 | static inline bool | |
281 | got_page_reloc(unsigned int r_type) | |
282 | { | |
283 | return (r_type == elfcpp::R_MIPS_GOT_PAGE | |
284 | || r_type == elfcpp::R_MICROMIPS_GOT_PAGE); | |
285 | } | |
286 | ||
287 | static inline bool | |
288 | tls_gd_reloc(unsigned int r_type) | |
289 | { | |
290 | return (r_type == elfcpp::R_MIPS_TLS_GD | |
291 | || r_type == elfcpp::R_MIPS16_TLS_GD | |
292 | || r_type == elfcpp::R_MICROMIPS_TLS_GD); | |
293 | } | |
294 | ||
295 | static inline bool | |
296 | tls_gottprel_reloc(unsigned int r_type) | |
297 | { | |
298 | return (r_type == elfcpp::R_MIPS_TLS_GOTTPREL | |
299 | || r_type == elfcpp::R_MIPS16_TLS_GOTTPREL | |
300 | || r_type == elfcpp::R_MICROMIPS_TLS_GOTTPREL); | |
301 | } | |
302 | ||
303 | static inline bool | |
304 | tls_ldm_reloc(unsigned int r_type) | |
305 | { | |
306 | return (r_type == elfcpp::R_MIPS_TLS_LDM | |
307 | || r_type == elfcpp::R_MIPS16_TLS_LDM | |
308 | || r_type == elfcpp::R_MICROMIPS_TLS_LDM); | |
309 | } | |
310 | ||
311 | static inline bool | |
312 | mips16_call_reloc(unsigned int r_type) | |
313 | { | |
314 | return (r_type == elfcpp::R_MIPS16_26 | |
315 | || r_type == elfcpp::R_MIPS16_CALL16); | |
316 | } | |
317 | ||
318 | static inline bool | |
319 | jal_reloc(unsigned int r_type) | |
320 | { | |
321 | return (r_type == elfcpp::R_MIPS_26 | |
322 | || r_type == elfcpp::R_MIPS16_26 | |
323 | || r_type == elfcpp::R_MICROMIPS_26_S1); | |
324 | } | |
325 | ||
326 | static inline bool | |
327 | micromips_branch_reloc(unsigned int r_type) | |
328 | { | |
329 | return (r_type == elfcpp::R_MICROMIPS_26_S1 | |
330 | || r_type == elfcpp::R_MICROMIPS_PC16_S1 | |
331 | || r_type == elfcpp::R_MICROMIPS_PC10_S1 | |
332 | || r_type == elfcpp::R_MICROMIPS_PC7_S1); | |
333 | } | |
334 | ||
335 | // Check if R_TYPE is a MIPS16 reloc. | |
336 | static inline bool | |
337 | mips16_reloc(unsigned int r_type) | |
338 | { | |
339 | switch (r_type) | |
340 | { | |
341 | case elfcpp::R_MIPS16_26: | |
342 | case elfcpp::R_MIPS16_GPREL: | |
343 | case elfcpp::R_MIPS16_GOT16: | |
344 | case elfcpp::R_MIPS16_CALL16: | |
345 | case elfcpp::R_MIPS16_HI16: | |
346 | case elfcpp::R_MIPS16_LO16: | |
347 | case elfcpp::R_MIPS16_TLS_GD: | |
348 | case elfcpp::R_MIPS16_TLS_LDM: | |
349 | case elfcpp::R_MIPS16_TLS_DTPREL_HI16: | |
350 | case elfcpp::R_MIPS16_TLS_DTPREL_LO16: | |
351 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
352 | case elfcpp::R_MIPS16_TLS_TPREL_HI16: | |
353 | case elfcpp::R_MIPS16_TLS_TPREL_LO16: | |
354 | return true; | |
355 | ||
356 | default: | |
357 | return false; | |
358 | } | |
359 | } | |
360 | ||
361 | // Check if R_TYPE is a microMIPS reloc. | |
362 | static inline bool | |
363 | micromips_reloc(unsigned int r_type) | |
364 | { | |
365 | switch (r_type) | |
366 | { | |
367 | case elfcpp::R_MICROMIPS_26_S1: | |
368 | case elfcpp::R_MICROMIPS_HI16: | |
369 | case elfcpp::R_MICROMIPS_LO16: | |
370 | case elfcpp::R_MICROMIPS_GPREL16: | |
371 | case elfcpp::R_MICROMIPS_LITERAL: | |
372 | case elfcpp::R_MICROMIPS_GOT16: | |
373 | case elfcpp::R_MICROMIPS_PC7_S1: | |
374 | case elfcpp::R_MICROMIPS_PC10_S1: | |
375 | case elfcpp::R_MICROMIPS_PC16_S1: | |
376 | case elfcpp::R_MICROMIPS_CALL16: | |
377 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
378 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
379 | case elfcpp::R_MICROMIPS_GOT_OFST: | |
380 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
381 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
382 | case elfcpp::R_MICROMIPS_SUB: | |
383 | case elfcpp::R_MICROMIPS_HIGHER: | |
384 | case elfcpp::R_MICROMIPS_HIGHEST: | |
385 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
386 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
387 | case elfcpp::R_MICROMIPS_SCN_DISP: | |
388 | case elfcpp::R_MICROMIPS_JALR: | |
389 | case elfcpp::R_MICROMIPS_HI0_LO16: | |
390 | case elfcpp::R_MICROMIPS_TLS_GD: | |
391 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
392 | case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16: | |
393 | case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16: | |
394 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
395 | case elfcpp::R_MICROMIPS_TLS_TPREL_HI16: | |
396 | case elfcpp::R_MICROMIPS_TLS_TPREL_LO16: | |
397 | case elfcpp::R_MICROMIPS_GPREL7_S2: | |
398 | case elfcpp::R_MICROMIPS_PC23_S2: | |
399 | return true; | |
400 | ||
401 | default: | |
402 | return false; | |
403 | } | |
404 | } | |
405 | ||
406 | static inline bool | |
407 | is_matching_lo16_reloc(unsigned int high_reloc, unsigned int lo16_reloc) | |
408 | { | |
409 | switch (high_reloc) | |
410 | { | |
411 | case elfcpp::R_MIPS_HI16: | |
412 | case elfcpp::R_MIPS_GOT16: | |
413 | return lo16_reloc == elfcpp::R_MIPS_LO16; | |
f5b11759 VR |
414 | case elfcpp::R_MIPS_PCHI16: |
415 | return lo16_reloc == elfcpp::R_MIPS_PCLO16; | |
9810d34d SS |
416 | case elfcpp::R_MIPS16_HI16: |
417 | case elfcpp::R_MIPS16_GOT16: | |
418 | return lo16_reloc == elfcpp::R_MIPS16_LO16; | |
419 | case elfcpp::R_MICROMIPS_HI16: | |
420 | case elfcpp::R_MICROMIPS_GOT16: | |
421 | return lo16_reloc == elfcpp::R_MICROMIPS_LO16; | |
422 | default: | |
423 | return false; | |
424 | } | |
425 | } | |
426 | ||
427 | // This class is used to hold information about one GOT entry. | |
428 | // There are three types of entry: | |
429 | // | |
430 | // (1) a SYMBOL + OFFSET address, where SYMBOL is local to an input object | |
431 | // (object != NULL, symndx >= 0, tls_type != GOT_TLS_LDM) | |
432 | // (2) a SYMBOL address, where SYMBOL is not local to an input object | |
15eb1beb VR |
433 | // (sym != NULL, symndx == -1) |
434 | // (3) a TLS LDM slot (there's only one of these per GOT.) | |
9810d34d SS |
435 | // (object != NULL, symndx == 0, tls_type == GOT_TLS_LDM) |
436 | ||
437 | template<int size, bool big_endian> | |
438 | class Mips_got_entry | |
439 | { | |
440 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
441 | ||
442 | public: | |
443 | Mips_got_entry(Mips_relobj<size, big_endian>* object, unsigned int symndx, | |
444 | Mips_address addend, unsigned char tls_type, | |
47a9f4fc | 445 | unsigned int shndx, bool is_section_symbol) |
15eb1beb | 446 | : addend_(addend), symndx_(symndx), tls_type_(tls_type), |
47a9f4fc | 447 | is_section_symbol_(is_section_symbol), shndx_(shndx) |
15eb1beb | 448 | { this->d.object = object; } |
9810d34d | 449 | |
15eb1beb VR |
450 | Mips_got_entry(Mips_symbol<size>* sym, unsigned char tls_type) |
451 | : addend_(0), symndx_(-1U), tls_type_(tls_type), | |
47a9f4fc | 452 | is_section_symbol_(false), shndx_(-1U) |
9810d34d SS |
453 | { this->d.sym = sym; } |
454 | ||
455 | // Return whether this entry is for a local symbol. | |
456 | bool | |
457 | is_for_local_symbol() const | |
458 | { return this->symndx_ != -1U; } | |
459 | ||
460 | // Return whether this entry is for a global symbol. | |
461 | bool | |
462 | is_for_global_symbol() const | |
463 | { return this->symndx_ == -1U; } | |
464 | ||
465 | // Return the hash of this entry. | |
466 | size_t | |
467 | hash() const | |
468 | { | |
469 | if (this->tls_type_ == GOT_TLS_LDM) | |
470 | return this->symndx_ + (1 << 18); | |
15eb1beb VR |
471 | |
472 | size_t name_hash_value = gold::string_hash<char>( | |
473 | (this->symndx_ != -1U) | |
474 | ? this->d.object->name().c_str() | |
475 | : this->d.sym->name()); | |
476 | size_t addend = this->addend_; | |
477 | return name_hash_value ^ this->symndx_ ^ addend; | |
9810d34d SS |
478 | } |
479 | ||
480 | // Return whether this entry is equal to OTHER. | |
481 | bool | |
482 | equals(Mips_got_entry<size, big_endian>* other) const | |
483 | { | |
9810d34d SS |
484 | if (this->tls_type_ == GOT_TLS_LDM) |
485 | return true; | |
15eb1beb VR |
486 | |
487 | return ((this->tls_type_ == other->tls_type_) | |
488 | && (this->symndx_ == other->symndx_) | |
489 | && ((this->symndx_ != -1U) | |
490 | ? (this->d.object == other->d.object) | |
491 | : (this->d.sym == other->d.sym)) | |
492 | && (this->addend_ == other->addend_)); | |
9810d34d SS |
493 | } |
494 | ||
495 | // Return input object that needs this GOT entry. | |
496 | Mips_relobj<size, big_endian>* | |
497 | object() const | |
498 | { | |
15eb1beb VR |
499 | gold_assert(this->symndx_ != -1U); |
500 | return this->d.object; | |
9810d34d SS |
501 | } |
502 | ||
503 | // Return local symbol index for local GOT entries. | |
504 | unsigned int | |
505 | symndx() const | |
506 | { | |
507 | gold_assert(this->symndx_ != -1U); | |
508 | return this->symndx_; | |
509 | } | |
510 | ||
511 | // Return the relocation addend for local GOT entries. | |
512 | Mips_address | |
513 | addend() const | |
15eb1beb | 514 | { return this->addend_; } |
9810d34d SS |
515 | |
516 | // Return global symbol for global GOT entries. | |
517 | Mips_symbol<size>* | |
518 | sym() const | |
519 | { | |
520 | gold_assert(this->symndx_ == -1U); | |
521 | return this->d.sym; | |
522 | } | |
523 | ||
524 | // Return whether this is a TLS GOT entry. | |
525 | bool | |
526 | is_tls_entry() const | |
527 | { return this->tls_type_ != GOT_TLS_NONE; } | |
528 | ||
529 | // Return TLS type of this GOT entry. | |
530 | unsigned char | |
531 | tls_type() const | |
532 | { return this->tls_type_; } | |
533 | ||
534 | // Return section index of the local symbol for local GOT entries. | |
535 | unsigned int | |
536 | shndx() const | |
537 | { return this->shndx_; } | |
538 | ||
47a9f4fc VR |
539 | // Return whether this is a STT_SECTION symbol. |
540 | bool | |
541 | is_section_symbol() const | |
542 | { return this->is_section_symbol_; } | |
543 | ||
9810d34d | 544 | private: |
15eb1beb VR |
545 | // The addend. |
546 | Mips_address addend_; | |
547 | ||
9810d34d SS |
548 | // The index of the symbol if we have a local symbol; -1 otherwise. |
549 | unsigned int symndx_; | |
550 | ||
551 | union | |
552 | { | |
15eb1beb VR |
553 | // The input object for local symbols that needs the GOT entry. |
554 | Mips_relobj<size, big_endian>* object; | |
9810d34d SS |
555 | // If symndx == -1, the global symbol corresponding to this GOT entry. The |
556 | // symbol's entry is in the local area if mips_sym->global_got_area is | |
557 | // GGA_NONE, otherwise it is in the global area. | |
558 | Mips_symbol<size>* sym; | |
559 | } d; | |
560 | ||
561 | // The TLS type of this GOT entry. An LDM GOT entry will be a local | |
562 | // symbol entry with r_symndx == 0. | |
563 | unsigned char tls_type_; | |
564 | ||
47a9f4fc VR |
565 | // Whether this is a STT_SECTION symbol. |
566 | bool is_section_symbol_; | |
567 | ||
9810d34d SS |
568 | // For local GOT entries, section index of the local symbol. |
569 | unsigned int shndx_; | |
570 | }; | |
571 | ||
572 | // Hash for Mips_got_entry. | |
573 | ||
574 | template<int size, bool big_endian> | |
575 | class Mips_got_entry_hash | |
576 | { | |
577 | public: | |
578 | size_t | |
579 | operator()(Mips_got_entry<size, big_endian>* entry) const | |
580 | { return entry->hash(); } | |
581 | }; | |
582 | ||
583 | // Equality for Mips_got_entry. | |
584 | ||
585 | template<int size, bool big_endian> | |
586 | class Mips_got_entry_eq | |
587 | { | |
588 | public: | |
589 | bool | |
590 | operator()(Mips_got_entry<size, big_endian>* e1, | |
591 | Mips_got_entry<size, big_endian>* e2) const | |
592 | { return e1->equals(e2); } | |
593 | }; | |
594 | ||
15eb1beb VR |
595 | // Hash for Mips_symbol. |
596 | ||
597 | template<int size> | |
598 | class Mips_symbol_hash | |
599 | { | |
600 | public: | |
601 | size_t | |
602 | operator()(Mips_symbol<size>* sym) const | |
603 | { return sym->hash(); } | |
604 | }; | |
605 | ||
9810d34d SS |
606 | // Got_page_range. This class describes a range of addends: [MIN_ADDEND, |
607 | // MAX_ADDEND]. The instances form a non-overlapping list that is sorted by | |
608 | // increasing MIN_ADDEND. | |
609 | ||
610 | struct Got_page_range | |
611 | { | |
612 | Got_page_range() | |
613 | : next(NULL), min_addend(0), max_addend(0) | |
614 | { } | |
615 | ||
616 | Got_page_range* next; | |
617 | int min_addend; | |
618 | int max_addend; | |
619 | ||
620 | // Return the maximum number of GOT page entries required. | |
621 | int | |
622 | get_max_pages() | |
623 | { return (this->max_addend - this->min_addend + 0x1ffff) >> 16; } | |
624 | }; | |
625 | ||
626 | // Got_page_entry. This class describes the range of addends that are applied | |
627 | // to page relocations against a given symbol. | |
628 | ||
629 | struct Got_page_entry | |
630 | { | |
631 | Got_page_entry() | |
632 | : object(NULL), symndx(-1U), ranges(NULL), num_pages(0) | |
633 | { } | |
634 | ||
635 | Got_page_entry(Object* object_, unsigned int symndx_) | |
636 | : object(object_), symndx(symndx_), ranges(NULL), num_pages(0) | |
637 | { } | |
638 | ||
639 | // The input object that needs the GOT page entry. | |
640 | Object* object; | |
641 | // The index of the symbol, as stored in the relocation r_info. | |
642 | unsigned int symndx; | |
643 | // The ranges for this page entry. | |
644 | Got_page_range* ranges; | |
645 | // The maximum number of page entries needed for RANGES. | |
646 | unsigned int num_pages; | |
647 | }; | |
648 | ||
649 | // Hash for Got_page_entry. | |
650 | ||
651 | struct Got_page_entry_hash | |
652 | { | |
653 | size_t | |
654 | operator()(Got_page_entry* entry) const | |
655 | { return reinterpret_cast<uintptr_t>(entry->object) + entry->symndx; } | |
656 | }; | |
657 | ||
658 | // Equality for Got_page_entry. | |
659 | ||
660 | struct Got_page_entry_eq | |
661 | { | |
662 | bool | |
663 | operator()(Got_page_entry* entry1, Got_page_entry* entry2) const | |
664 | { | |
665 | return entry1->object == entry2->object && entry1->symndx == entry2->symndx; | |
666 | } | |
667 | }; | |
668 | ||
669 | // This class is used to hold .got information when linking. | |
670 | ||
671 | template<int size, bool big_endian> | |
672 | class Mips_got_info | |
673 | { | |
674 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
675 | typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> | |
676 | Reloc_section; | |
677 | typedef Unordered_map<unsigned int, unsigned int> Got_page_offsets; | |
678 | ||
679 | // Unordered set of GOT entries. | |
680 | typedef Unordered_set<Mips_got_entry<size, big_endian>*, | |
681 | Mips_got_entry_hash<size, big_endian>, | |
682 | Mips_got_entry_eq<size, big_endian> > Got_entry_set; | |
683 | ||
684 | // Unordered set of GOT page entries. | |
685 | typedef Unordered_set<Got_page_entry*, | |
686 | Got_page_entry_hash, Got_page_entry_eq> Got_page_entry_set; | |
687 | ||
15eb1beb VR |
688 | // Unordered set of global GOT entries. |
689 | typedef Unordered_set<Mips_symbol<size>*, Mips_symbol_hash<size> > | |
690 | Global_got_entry_set; | |
691 | ||
9810d34d SS |
692 | public: |
693 | Mips_got_info() | |
694 | : local_gotno_(0), page_gotno_(0), global_gotno_(0), reloc_only_gotno_(0), | |
695 | tls_gotno_(0), tls_ldm_offset_(-1U), global_got_symbols_(), | |
696 | got_entries_(), got_page_entries_(), got_page_offset_start_(0), | |
697 | got_page_offset_next_(0), got_page_offsets_(), next_(NULL), index_(-1U), | |
698 | offset_(0) | |
699 | { } | |
700 | ||
701 | // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol | |
702 | // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT. | |
703 | void | |
704 | record_local_got_symbol(Mips_relobj<size, big_endian>* object, | |
705 | unsigned int symndx, Mips_address addend, | |
47a9f4fc VR |
706 | unsigned int r_type, unsigned int shndx, |
707 | bool is_section_symbol); | |
9810d34d SS |
708 | |
709 | // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM, | |
710 | // in OBJECT. FOR_CALL is true if the caller is only interested in | |
711 | // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic | |
712 | // relocation. | |
713 | void | |
714 | record_global_got_symbol(Mips_symbol<size>* mips_sym, | |
715 | Mips_relobj<size, big_endian>* object, | |
716 | unsigned int r_type, bool dyn_reloc, bool for_call); | |
717 | ||
718 | // Add ENTRY to master GOT and to OBJECT's GOT. | |
719 | void | |
720 | record_got_entry(Mips_got_entry<size, big_endian>* entry, | |
721 | Mips_relobj<size, big_endian>* object); | |
722 | ||
723 | // Record that OBJECT has a page relocation against symbol SYMNDX and | |
724 | // that ADDEND is the addend for that relocation. | |
725 | void | |
726 | record_got_page_entry(Mips_relobj<size, big_endian>* object, | |
727 | unsigned int symndx, int addend); | |
728 | ||
729 | // Create all entries that should be in the local part of the GOT. | |
730 | void | |
731 | add_local_entries(Target_mips<size, big_endian>* target, Layout* layout); | |
732 | ||
733 | // Create GOT page entries. | |
734 | void | |
735 | add_page_entries(Target_mips<size, big_endian>* target, Layout* layout); | |
736 | ||
737 | // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY. | |
738 | void | |
739 | add_global_entries(Target_mips<size, big_endian>* target, Layout* layout, | |
740 | unsigned int non_reloc_only_global_gotno); | |
741 | ||
742 | // Create global GOT entries that should be in the GGA_RELOC_ONLY area. | |
743 | void | |
744 | add_reloc_only_entries(Mips_output_data_got<size, big_endian>* got); | |
745 | ||
746 | // Create TLS GOT entries. | |
747 | void | |
748 | add_tls_entries(Target_mips<size, big_endian>* target, Layout* layout); | |
749 | ||
750 | // Decide whether the symbol needs an entry in the global part of the primary | |
751 | // GOT, setting global_got_area accordingly. Count the number of global | |
752 | // symbols that are in the primary GOT only because they have dynamic | |
753 | // relocations R_MIPS_REL32 against them (reloc_only_gotno). | |
754 | void | |
755 | count_got_symbols(Symbol_table* symtab); | |
756 | ||
757 | // Return the offset of GOT page entry for VALUE. | |
758 | unsigned int | |
759 | get_got_page_offset(Mips_address value, | |
760 | Mips_output_data_got<size, big_endian>* got); | |
761 | ||
762 | // Count the number of GOT entries required. | |
763 | void | |
764 | count_got_entries(); | |
765 | ||
766 | // Count the number of GOT entries required by ENTRY. Accumulate the result. | |
767 | void | |
768 | count_got_entry(Mips_got_entry<size, big_endian>* entry); | |
769 | ||
770 | // Add FROM's GOT entries. | |
771 | void | |
772 | add_got_entries(Mips_got_info<size, big_endian>* from); | |
773 | ||
774 | // Add FROM's GOT page entries. | |
775 | void | |
776 | add_got_page_entries(Mips_got_info<size, big_endian>* from); | |
777 | ||
778 | // Return GOT size. | |
779 | unsigned int | |
780 | got_size() const | |
781 | { return ((2 + this->local_gotno_ + this->page_gotno_ + this->global_gotno_ | |
782 | + this->tls_gotno_) * size/8); | |
783 | } | |
784 | ||
785 | // Return the number of local GOT entries. | |
786 | unsigned int | |
787 | local_gotno() const | |
788 | { return this->local_gotno_; } | |
789 | ||
790 | // Return the maximum number of page GOT entries needed. | |
791 | unsigned int | |
792 | page_gotno() const | |
793 | { return this->page_gotno_; } | |
794 | ||
795 | // Return the number of global GOT entries. | |
796 | unsigned int | |
797 | global_gotno() const | |
798 | { return this->global_gotno_; } | |
799 | ||
800 | // Set the number of global GOT entries. | |
801 | void | |
802 | set_global_gotno(unsigned int global_gotno) | |
803 | { this->global_gotno_ = global_gotno; } | |
804 | ||
805 | // Return the number of GGA_RELOC_ONLY global GOT entries. | |
806 | unsigned int | |
807 | reloc_only_gotno() const | |
808 | { return this->reloc_only_gotno_; } | |
809 | ||
810 | // Return the number of TLS GOT entries. | |
811 | unsigned int | |
812 | tls_gotno() const | |
813 | { return this->tls_gotno_; } | |
814 | ||
815 | // Return the GOT type for this GOT. Used for multi-GOT links only. | |
816 | unsigned int | |
817 | multigot_got_type(unsigned int got_type) const | |
818 | { | |
819 | switch (got_type) | |
820 | { | |
821 | case GOT_TYPE_STANDARD: | |
822 | return GOT_TYPE_STANDARD_MULTIGOT + this->index_; | |
823 | case GOT_TYPE_TLS_OFFSET: | |
824 | return GOT_TYPE_TLS_OFFSET_MULTIGOT + this->index_; | |
825 | case GOT_TYPE_TLS_PAIR: | |
826 | return GOT_TYPE_TLS_PAIR_MULTIGOT + this->index_; | |
827 | default: | |
828 | gold_unreachable(); | |
829 | } | |
830 | } | |
831 | ||
832 | // Remove lazy-binding stubs for global symbols in this GOT. | |
833 | void | |
834 | remove_lazy_stubs(Target_mips<size, big_endian>* target); | |
835 | ||
836 | // Return offset of this GOT from the start of .got section. | |
837 | unsigned int | |
838 | offset() const | |
839 | { return this->offset_; } | |
840 | ||
841 | // Set offset of this GOT from the start of .got section. | |
842 | void | |
843 | set_offset(unsigned int offset) | |
844 | { this->offset_ = offset; } | |
845 | ||
846 | // Set index of this GOT in multi-GOT links. | |
847 | void | |
848 | set_index(unsigned int index) | |
849 | { this->index_ = index; } | |
850 | ||
851 | // Return next GOT in multi-GOT links. | |
852 | Mips_got_info<size, big_endian>* | |
853 | next() const | |
854 | { return this->next_; } | |
855 | ||
856 | // Set next GOT in multi-GOT links. | |
857 | void | |
858 | set_next(Mips_got_info<size, big_endian>* next) | |
859 | { this->next_ = next; } | |
860 | ||
861 | // Return the offset of TLS LDM entry for this GOT. | |
862 | unsigned int | |
863 | tls_ldm_offset() const | |
864 | { return this->tls_ldm_offset_; } | |
865 | ||
866 | // Set the offset of TLS LDM entry for this GOT. | |
867 | void | |
868 | set_tls_ldm_offset(unsigned int tls_ldm_offset) | |
869 | { this->tls_ldm_offset_ = tls_ldm_offset; } | |
870 | ||
15eb1beb | 871 | Global_got_entry_set& |
9810d34d SS |
872 | global_got_symbols() |
873 | { return this->global_got_symbols_; } | |
874 | ||
875 | // Return the GOT_TLS_* type required by relocation type R_TYPE. | |
876 | static int | |
877 | mips_elf_reloc_tls_type(unsigned int r_type) | |
878 | { | |
879 | if (tls_gd_reloc(r_type)) | |
880 | return GOT_TLS_GD; | |
881 | ||
882 | if (tls_ldm_reloc(r_type)) | |
883 | return GOT_TLS_LDM; | |
884 | ||
885 | if (tls_gottprel_reloc(r_type)) | |
886 | return GOT_TLS_IE; | |
887 | ||
888 | return GOT_TLS_NONE; | |
889 | } | |
890 | ||
891 | // Return the number of GOT slots needed for GOT TLS type TYPE. | |
892 | static int | |
893 | mips_tls_got_entries(unsigned int type) | |
894 | { | |
895 | switch (type) | |
896 | { | |
897 | case GOT_TLS_GD: | |
898 | case GOT_TLS_LDM: | |
899 | return 2; | |
900 | ||
901 | case GOT_TLS_IE: | |
902 | return 1; | |
903 | ||
904 | case GOT_TLS_NONE: | |
905 | return 0; | |
906 | ||
907 | default: | |
908 | gold_unreachable(); | |
909 | } | |
910 | } | |
911 | ||
912 | private: | |
913 | // The number of local GOT entries. | |
914 | unsigned int local_gotno_; | |
915 | // The maximum number of page GOT entries needed. | |
916 | unsigned int page_gotno_; | |
917 | // The number of global GOT entries. | |
918 | unsigned int global_gotno_; | |
919 | // The number of global GOT entries that are in the GGA_RELOC_ONLY area. | |
920 | unsigned int reloc_only_gotno_; | |
921 | // The number of TLS GOT entries. | |
922 | unsigned int tls_gotno_; | |
923 | // The offset of TLS LDM entry for this GOT. | |
924 | unsigned int tls_ldm_offset_; | |
925 | // All symbols that have global GOT entry. | |
15eb1beb | 926 | Global_got_entry_set global_got_symbols_; |
9810d34d SS |
927 | // A hash table holding GOT entries. |
928 | Got_entry_set got_entries_; | |
929 | // A hash table of GOT page entries. | |
930 | Got_page_entry_set got_page_entries_; | |
931 | // The offset of first GOT page entry for this GOT. | |
932 | unsigned int got_page_offset_start_; | |
933 | // The offset of next available GOT page entry for this GOT. | |
934 | unsigned int got_page_offset_next_; | |
935 | // A hash table that maps GOT page entry value to the GOT offset where | |
936 | // the entry is located. | |
937 | Got_page_offsets got_page_offsets_; | |
938 | // In multi-GOT links, a pointer to the next GOT. | |
939 | Mips_got_info<size, big_endian>* next_; | |
940 | // Index of this GOT in multi-GOT links. | |
941 | unsigned int index_; | |
942 | // The offset of this GOT in multi-GOT links. | |
943 | unsigned int offset_; | |
944 | }; | |
945 | ||
946 | // This is a helper class used during relocation scan. It records GOT16 addend. | |
947 | ||
948 | template<int size, bool big_endian> | |
949 | struct got16_addend | |
950 | { | |
951 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
952 | ||
953 | got16_addend(const Sized_relobj_file<size, big_endian>* _object, | |
954 | unsigned int _shndx, unsigned int _r_type, unsigned int _r_sym, | |
955 | Mips_address _addend) | |
956 | : object(_object), shndx(_shndx), r_type(_r_type), r_sym(_r_sym), | |
957 | addend(_addend) | |
958 | { } | |
959 | ||
960 | const Sized_relobj_file<size, big_endian>* object; | |
961 | unsigned int shndx; | |
962 | unsigned int r_type; | |
963 | unsigned int r_sym; | |
964 | Mips_address addend; | |
965 | }; | |
966 | ||
b52717c0 VR |
967 | // .MIPS.abiflags section content |
968 | ||
969 | template<bool big_endian> | |
970 | struct Mips_abiflags | |
971 | { | |
972 | typedef typename elfcpp::Swap<8, big_endian>::Valtype Valtype8; | |
973 | typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype16; | |
974 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32; | |
975 | ||
976 | Mips_abiflags() | |
977 | : version(0), isa_level(0), isa_rev(0), gpr_size(0), cpr1_size(0), | |
978 | cpr2_size(0), fp_abi(0), isa_ext(0), ases(0), flags1(0), flags2(0) | |
979 | { } | |
980 | ||
981 | // Version of flags structure. | |
982 | Valtype16 version; | |
983 | // The level of the ISA: 1-5, 32, 64. | |
984 | Valtype8 isa_level; | |
985 | // The revision of ISA: 0 for MIPS V and below, 1-n otherwise. | |
986 | Valtype8 isa_rev; | |
987 | // The size of general purpose registers. | |
988 | Valtype8 gpr_size; | |
989 | // The size of co-processor 1 registers. | |
990 | Valtype8 cpr1_size; | |
991 | // The size of co-processor 2 registers. | |
992 | Valtype8 cpr2_size; | |
993 | // The floating-point ABI. | |
994 | Valtype8 fp_abi; | |
995 | // Processor-specific extension. | |
996 | Valtype32 isa_ext; | |
997 | // Mask of ASEs used. | |
998 | Valtype32 ases; | |
999 | // Mask of general flags. | |
1000 | Valtype32 flags1; | |
1001 | Valtype32 flags2; | |
1002 | }; | |
1003 | ||
9810d34d SS |
1004 | // Mips_symbol class. Holds additional symbol information needed for Mips. |
1005 | ||
1006 | template<int size> | |
1007 | class Mips_symbol : public Sized_symbol<size> | |
1008 | { | |
1009 | public: | |
1010 | Mips_symbol() | |
1011 | : need_fn_stub_(false), has_nonpic_branches_(false), la25_stub_offset_(-1U), | |
1012 | has_static_relocs_(false), no_lazy_stub_(false), lazy_stub_offset_(0), | |
1013 | pointer_equality_needed_(false), global_got_area_(GGA_NONE), | |
1014 | global_gotoffset_(-1U), got_only_for_calls_(true), has_lazy_stub_(false), | |
1015 | needs_mips_plt_(false), needs_comp_plt_(false), mips_plt_offset_(-1U), | |
1016 | comp_plt_offset_(-1U), mips16_fn_stub_(NULL), mips16_call_stub_(NULL), | |
1017 | mips16_call_fp_stub_(NULL), applied_secondary_got_fixup_(false) | |
1018 | { } | |
1019 | ||
1020 | // Return whether this is a MIPS16 symbol. | |
1021 | bool | |
1022 | is_mips16() const | |
1023 | { | |
1024 | // (st_other & STO_MIPS16) == STO_MIPS16 | |
1025 | return ((this->nonvis() & (elfcpp::STO_MIPS16 >> 2)) | |
1026 | == elfcpp::STO_MIPS16 >> 2); | |
1027 | } | |
1028 | ||
1029 | // Return whether this is a microMIPS symbol. | |
1030 | bool | |
1031 | is_micromips() const | |
1032 | { | |
1033 | // (st_other & STO_MIPS_ISA) == STO_MICROMIPS | |
1034 | return ((this->nonvis() & (elfcpp::STO_MIPS_ISA >> 2)) | |
1035 | == elfcpp::STO_MICROMIPS >> 2); | |
1036 | } | |
1037 | ||
1038 | // Return whether the symbol needs MIPS16 fn_stub. | |
1039 | bool | |
1040 | need_fn_stub() const | |
1041 | { return this->need_fn_stub_; } | |
1042 | ||
1043 | // Set that the symbol needs MIPS16 fn_stub. | |
1044 | void | |
1045 | set_need_fn_stub() | |
1046 | { this->need_fn_stub_ = true; } | |
1047 | ||
1048 | // Return whether this symbol is referenced by branch relocations from | |
1049 | // any non-PIC input file. | |
1050 | bool | |
1051 | has_nonpic_branches() const | |
1052 | { return this->has_nonpic_branches_; } | |
1053 | ||
1054 | // Set that this symbol is referenced by branch relocations from | |
1055 | // any non-PIC input file. | |
1056 | void | |
1057 | set_has_nonpic_branches() | |
1058 | { this->has_nonpic_branches_ = true; } | |
1059 | ||
1060 | // Return the offset of the la25 stub for this symbol from the start of the | |
1061 | // la25 stub section. | |
1062 | unsigned int | |
1063 | la25_stub_offset() const | |
1064 | { return this->la25_stub_offset_; } | |
1065 | ||
1066 | // Set the offset of the la25 stub for this symbol from the start of the | |
1067 | // la25 stub section. | |
1068 | void | |
1069 | set_la25_stub_offset(unsigned int offset) | |
1070 | { this->la25_stub_offset_ = offset; } | |
1071 | ||
1072 | // Return whether the symbol has la25 stub. This is true if this symbol is | |
1073 | // for a PIC function, and there are non-PIC branches and jumps to it. | |
1074 | bool | |
1075 | has_la25_stub() const | |
1076 | { return this->la25_stub_offset_ != -1U; } | |
1077 | ||
1078 | // Return whether there is a relocation against this symbol that must be | |
1079 | // resolved by the static linker (that is, the relocation cannot possibly | |
1080 | // be made dynamic). | |
1081 | bool | |
1082 | has_static_relocs() const | |
1083 | { return this->has_static_relocs_; } | |
1084 | ||
1085 | // Set that there is a relocation against this symbol that must be resolved | |
1086 | // by the static linker (that is, the relocation cannot possibly be made | |
1087 | // dynamic). | |
1088 | void | |
1089 | set_has_static_relocs() | |
1090 | { this->has_static_relocs_ = true; } | |
1091 | ||
1092 | // Return whether we must not create a lazy-binding stub for this symbol. | |
1093 | bool | |
1094 | no_lazy_stub() const | |
1095 | { return this->no_lazy_stub_; } | |
1096 | ||
1097 | // Set that we must not create a lazy-binding stub for this symbol. | |
1098 | void | |
1099 | set_no_lazy_stub() | |
1100 | { this->no_lazy_stub_ = true; } | |
1101 | ||
1102 | // Return the offset of the lazy-binding stub for this symbol from the start | |
1103 | // of .MIPS.stubs section. | |
1104 | unsigned int | |
1105 | lazy_stub_offset() const | |
1106 | { return this->lazy_stub_offset_; } | |
1107 | ||
1108 | // Set the offset of the lazy-binding stub for this symbol from the start | |
1109 | // of .MIPS.stubs section. | |
1110 | void | |
1111 | set_lazy_stub_offset(unsigned int offset) | |
1112 | { this->lazy_stub_offset_ = offset; } | |
1113 | ||
1114 | // Return whether there are any relocations for this symbol where | |
1115 | // pointer equality matters. | |
1116 | bool | |
1117 | pointer_equality_needed() const | |
1118 | { return this->pointer_equality_needed_; } | |
1119 | ||
1120 | // Set that there are relocations for this symbol where pointer equality | |
1121 | // matters. | |
1122 | void | |
1123 | set_pointer_equality_needed() | |
1124 | { this->pointer_equality_needed_ = true; } | |
1125 | ||
1126 | // Return global GOT area where this symbol in located. | |
1127 | Global_got_area | |
1128 | global_got_area() const | |
1129 | { return this->global_got_area_; } | |
1130 | ||
1131 | // Set global GOT area where this symbol in located. | |
1132 | void | |
1133 | set_global_got_area(Global_got_area global_got_area) | |
1134 | { this->global_got_area_ = global_got_area; } | |
1135 | ||
1136 | // Return the global GOT offset for this symbol. For multi-GOT links, this | |
1137 | // returns the offset from the start of .got section to the first GOT entry | |
1138 | // for the symbol. Note that in multi-GOT links the symbol can have entry | |
1139 | // in more than one GOT. | |
1140 | unsigned int | |
1141 | global_gotoffset() const | |
1142 | { return this->global_gotoffset_; } | |
1143 | ||
1144 | // Set the global GOT offset for this symbol. Note that in multi-GOT links | |
1145 | // the symbol can have entry in more than one GOT. This method will set | |
1146 | // the offset only if it is less than current offset. | |
1147 | void | |
1148 | set_global_gotoffset(unsigned int offset) | |
1149 | { | |
1150 | if (this->global_gotoffset_ == -1U || offset < this->global_gotoffset_) | |
1151 | this->global_gotoffset_ = offset; | |
1152 | } | |
1153 | ||
1154 | // Return whether all GOT relocations for this symbol are for calls. | |
1155 | bool | |
1156 | got_only_for_calls() const | |
1157 | { return this->got_only_for_calls_; } | |
1158 | ||
1159 | // Set that there is a GOT relocation for this symbol that is not for call. | |
1160 | void | |
1161 | set_got_not_only_for_calls() | |
1162 | { this->got_only_for_calls_ = false; } | |
1163 | ||
1164 | // Return whether this is a PIC symbol. | |
1165 | bool | |
1166 | is_pic() const | |
1167 | { | |
1168 | // (st_other & STO_MIPS_FLAGS) == STO_MIPS_PIC | |
1169 | return ((this->nonvis() & (elfcpp::STO_MIPS_FLAGS >> 2)) | |
1170 | == (elfcpp::STO_MIPS_PIC >> 2)); | |
1171 | } | |
1172 | ||
1173 | // Set the flag in st_other field that marks this symbol as PIC. | |
1174 | void | |
1175 | set_pic() | |
1176 | { | |
1177 | if (this->is_mips16()) | |
1178 | // (st_other & ~(STO_MIPS16 | STO_MIPS_FLAGS)) | STO_MIPS_PIC | |
1179 | this->set_nonvis((this->nonvis() | |
1180 | & ~((elfcpp::STO_MIPS16 >> 2) | |
1181 | | (elfcpp::STO_MIPS_FLAGS >> 2))) | |
1182 | | (elfcpp::STO_MIPS_PIC >> 2)); | |
1183 | else | |
1184 | // (other & ~STO_MIPS_FLAGS) | STO_MIPS_PIC | |
1185 | this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS >> 2)) | |
1186 | | (elfcpp::STO_MIPS_PIC >> 2)); | |
1187 | } | |
1188 | ||
1189 | // Set the flag in st_other field that marks this symbol as PLT. | |
1190 | void | |
1191 | set_mips_plt() | |
1192 | { | |
1193 | if (this->is_mips16()) | |
1194 | // (st_other & (STO_MIPS16 | ~STO_MIPS_FLAGS)) | STO_MIPS_PLT | |
1195 | this->set_nonvis((this->nonvis() | |
1196 | & ((elfcpp::STO_MIPS16 >> 2) | |
1197 | | ~(elfcpp::STO_MIPS_FLAGS >> 2))) | |
1198 | | (elfcpp::STO_MIPS_PLT >> 2)); | |
1199 | ||
1200 | else | |
1201 | // (st_other & ~STO_MIPS_FLAGS) | STO_MIPS_PLT | |
1202 | this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS >> 2)) | |
1203 | | (elfcpp::STO_MIPS_PLT >> 2)); | |
1204 | } | |
1205 | ||
1206 | // Downcast a base pointer to a Mips_symbol pointer. | |
1207 | static Mips_symbol<size>* | |
1208 | as_mips_sym(Symbol* sym) | |
1209 | { return static_cast<Mips_symbol<size>*>(sym); } | |
1210 | ||
1211 | // Downcast a base pointer to a Mips_symbol pointer. | |
1212 | static const Mips_symbol<size>* | |
1213 | as_mips_sym(const Symbol* sym) | |
1214 | { return static_cast<const Mips_symbol<size>*>(sym); } | |
1215 | ||
1216 | // Return whether the symbol has lazy-binding stub. | |
1217 | bool | |
1218 | has_lazy_stub() const | |
1219 | { return this->has_lazy_stub_; } | |
1220 | ||
1221 | // Set whether the symbol has lazy-binding stub. | |
1222 | void | |
1223 | set_has_lazy_stub(bool has_lazy_stub) | |
1224 | { this->has_lazy_stub_ = has_lazy_stub; } | |
1225 | ||
1226 | // Return whether the symbol needs a standard PLT entry. | |
1227 | bool | |
1228 | needs_mips_plt() const | |
1229 | { return this->needs_mips_plt_; } | |
1230 | ||
1231 | // Set whether the symbol needs a standard PLT entry. | |
1232 | void | |
1233 | set_needs_mips_plt(bool needs_mips_plt) | |
1234 | { this->needs_mips_plt_ = needs_mips_plt; } | |
1235 | ||
1236 | // Return whether the symbol needs a compressed (MIPS16 or microMIPS) PLT | |
1237 | // entry. | |
1238 | bool | |
1239 | needs_comp_plt() const | |
1240 | { return this->needs_comp_plt_; } | |
1241 | ||
1242 | // Set whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry. | |
1243 | void | |
1244 | set_needs_comp_plt(bool needs_comp_plt) | |
1245 | { this->needs_comp_plt_ = needs_comp_plt; } | |
1246 | ||
1247 | // Return standard PLT entry offset, or -1 if none. | |
1248 | unsigned int | |
1249 | mips_plt_offset() const | |
1250 | { return this->mips_plt_offset_; } | |
1251 | ||
1252 | // Set standard PLT entry offset. | |
1253 | void | |
1254 | set_mips_plt_offset(unsigned int mips_plt_offset) | |
1255 | { this->mips_plt_offset_ = mips_plt_offset; } | |
1256 | ||
1257 | // Return whether the symbol has standard PLT entry. | |
1258 | bool | |
1259 | has_mips_plt_offset() const | |
1260 | { return this->mips_plt_offset_ != -1U; } | |
1261 | ||
1262 | // Return compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none. | |
1263 | unsigned int | |
1264 | comp_plt_offset() const | |
1265 | { return this->comp_plt_offset_; } | |
1266 | ||
1267 | // Set compressed (MIPS16 or microMIPS) PLT entry offset. | |
1268 | void | |
1269 | set_comp_plt_offset(unsigned int comp_plt_offset) | |
1270 | { this->comp_plt_offset_ = comp_plt_offset; } | |
1271 | ||
1272 | // Return whether the symbol has compressed (MIPS16 or microMIPS) PLT entry. | |
1273 | bool | |
1274 | has_comp_plt_offset() const | |
1275 | { return this->comp_plt_offset_ != -1U; } | |
1276 | ||
1277 | // Return MIPS16 fn stub for a symbol. | |
1278 | template<bool big_endian> | |
1279 | Mips16_stub_section<size, big_endian>* | |
1280 | get_mips16_fn_stub() const | |
1281 | { | |
1282 | return static_cast<Mips16_stub_section<size, big_endian>*>(mips16_fn_stub_); | |
1283 | } | |
1284 | ||
1285 | // Set MIPS16 fn stub for a symbol. | |
1286 | void | |
1287 | set_mips16_fn_stub(Mips16_stub_section_base* stub) | |
1288 | { this->mips16_fn_stub_ = stub; } | |
1289 | ||
1290 | // Return whether symbol has MIPS16 fn stub. | |
1291 | bool | |
1292 | has_mips16_fn_stub() const | |
1293 | { return this->mips16_fn_stub_ != NULL; } | |
1294 | ||
1295 | // Return MIPS16 call stub for a symbol. | |
1296 | template<bool big_endian> | |
1297 | Mips16_stub_section<size, big_endian>* | |
1298 | get_mips16_call_stub() const | |
1299 | { | |
1300 | return static_cast<Mips16_stub_section<size, big_endian>*>( | |
1301 | mips16_call_stub_); | |
1302 | } | |
1303 | ||
1304 | // Set MIPS16 call stub for a symbol. | |
1305 | void | |
1306 | set_mips16_call_stub(Mips16_stub_section_base* stub) | |
1307 | { this->mips16_call_stub_ = stub; } | |
1308 | ||
1309 | // Return whether symbol has MIPS16 call stub. | |
1310 | bool | |
1311 | has_mips16_call_stub() const | |
1312 | { return this->mips16_call_stub_ != NULL; } | |
1313 | ||
1314 | // Return MIPS16 call_fp stub for a symbol. | |
1315 | template<bool big_endian> | |
1316 | Mips16_stub_section<size, big_endian>* | |
1317 | get_mips16_call_fp_stub() const | |
1318 | { | |
1319 | return static_cast<Mips16_stub_section<size, big_endian>*>( | |
1320 | mips16_call_fp_stub_); | |
1321 | } | |
1322 | ||
1323 | // Set MIPS16 call_fp stub for a symbol. | |
1324 | void | |
1325 | set_mips16_call_fp_stub(Mips16_stub_section_base* stub) | |
1326 | { this->mips16_call_fp_stub_ = stub; } | |
1327 | ||
1328 | // Return whether symbol has MIPS16 call_fp stub. | |
1329 | bool | |
1330 | has_mips16_call_fp_stub() const | |
1331 | { return this->mips16_call_fp_stub_ != NULL; } | |
1332 | ||
1333 | bool | |
1334 | get_applied_secondary_got_fixup() const | |
1335 | { return applied_secondary_got_fixup_; } | |
1336 | ||
1337 | void | |
1338 | set_applied_secondary_got_fixup() | |
1339 | { this->applied_secondary_got_fixup_ = true; } | |
1340 | ||
15eb1beb VR |
1341 | // Return the hash of this symbol. |
1342 | size_t | |
1343 | hash() const | |
1344 | { | |
1345 | return gold::string_hash<char>(this->name()); | |
1346 | } | |
1347 | ||
9810d34d SS |
1348 | private: |
1349 | // Whether the symbol needs MIPS16 fn_stub. This is true if this symbol | |
1350 | // appears in any relocs other than a 16 bit call. | |
1351 | bool need_fn_stub_; | |
1352 | ||
1353 | // True if this symbol is referenced by branch relocations from | |
1354 | // any non-PIC input file. This is used to determine whether an | |
1355 | // la25 stub is required. | |
1356 | bool has_nonpic_branches_; | |
1357 | ||
1358 | // The offset of the la25 stub for this symbol from the start of the | |
1359 | // la25 stub section. | |
1360 | unsigned int la25_stub_offset_; | |
1361 | ||
1362 | // True if there is a relocation against this symbol that must be | |
1363 | // resolved by the static linker (that is, the relocation cannot | |
1364 | // possibly be made dynamic). | |
1365 | bool has_static_relocs_; | |
1366 | ||
1367 | // Whether we must not create a lazy-binding stub for this symbol. | |
1368 | // This is true if the symbol has relocations related to taking the | |
1369 | // function's address. | |
1370 | bool no_lazy_stub_; | |
1371 | ||
1372 | // The offset of the lazy-binding stub for this symbol from the start of | |
1373 | // .MIPS.stubs section. | |
1374 | unsigned int lazy_stub_offset_; | |
1375 | ||
1376 | // True if there are any relocations for this symbol where pointer equality | |
1377 | // matters. | |
1378 | bool pointer_equality_needed_; | |
1379 | ||
1380 | // Global GOT area where this symbol in located, or GGA_NONE if symbol is not | |
1381 | // in the global part of the GOT. | |
1382 | Global_got_area global_got_area_; | |
1383 | ||
1384 | // The global GOT offset for this symbol. For multi-GOT links, this is offset | |
1385 | // from the start of .got section to the first GOT entry for the symbol. | |
1386 | // Note that in multi-GOT links the symbol can have entry in more than one GOT. | |
1387 | unsigned int global_gotoffset_; | |
1388 | ||
1389 | // Whether all GOT relocations for this symbol are for calls. | |
1390 | bool got_only_for_calls_; | |
1391 | // Whether the symbol has lazy-binding stub. | |
1392 | bool has_lazy_stub_; | |
1393 | // Whether the symbol needs a standard PLT entry. | |
1394 | bool needs_mips_plt_; | |
1395 | // Whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry. | |
1396 | bool needs_comp_plt_; | |
1397 | // Standard PLT entry offset, or -1 if none. | |
1398 | unsigned int mips_plt_offset_; | |
1399 | // Compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none. | |
1400 | unsigned int comp_plt_offset_; | |
1401 | // MIPS16 fn stub for a symbol. | |
1402 | Mips16_stub_section_base* mips16_fn_stub_; | |
1403 | // MIPS16 call stub for a symbol. | |
1404 | Mips16_stub_section_base* mips16_call_stub_; | |
1405 | // MIPS16 call_fp stub for a symbol. | |
1406 | Mips16_stub_section_base* mips16_call_fp_stub_; | |
1407 | ||
1408 | bool applied_secondary_got_fixup_; | |
1409 | }; | |
1410 | ||
1411 | // Mips16_stub_section class. | |
1412 | ||
1413 | // The mips16 compiler uses a couple of special sections to handle | |
1414 | // floating point arguments. | |
1415 | ||
1416 | // Section names that look like .mips16.fn.FNNAME contain stubs that | |
1417 | // copy floating point arguments from the fp regs to the gp regs and | |
1418 | // then jump to FNNAME. If any 32 bit function calls FNNAME, the | |
1419 | // call should be redirected to the stub instead. If no 32 bit | |
1420 | // function calls FNNAME, the stub should be discarded. We need to | |
1421 | // consider any reference to the function, not just a call, because | |
1422 | // if the address of the function is taken we will need the stub, | |
1423 | // since the address might be passed to a 32 bit function. | |
1424 | ||
1425 | // Section names that look like .mips16.call.FNNAME contain stubs | |
1426 | // that copy floating point arguments from the gp regs to the fp | |
1427 | // regs and then jump to FNNAME. If FNNAME is a 32 bit function, | |
1428 | // then any 16 bit function that calls FNNAME should be redirected | |
1429 | // to the stub instead. If FNNAME is not a 32 bit function, the | |
1430 | // stub should be discarded. | |
1431 | ||
1432 | // .mips16.call.fp.FNNAME sections are similar, but contain stubs | |
1433 | // which call FNNAME and then copy the return value from the fp regs | |
1434 | // to the gp regs. These stubs store the return address in $18 while | |
1435 | // calling FNNAME; any function which might call one of these stubs | |
1436 | // must arrange to save $18 around the call. (This case is not | |
1437 | // needed for 32 bit functions that call 16 bit functions, because | |
1438 | // 16 bit functions always return floating point values in both | |
1439 | // $f0/$f1 and $2/$3.) | |
1440 | ||
1441 | // Note that in all cases FNNAME might be defined statically. | |
1442 | // Therefore, FNNAME is not used literally. Instead, the relocation | |
1443 | // information will indicate which symbol the section is for. | |
1444 | ||
1445 | // We record any stubs that we find in the symbol table. | |
1446 | ||
1447 | // TODO(sasa): All mips16 stub sections should be emitted in the .text section. | |
1448 | ||
1449 | class Mips16_stub_section_base { }; | |
1450 | ||
1451 | template<int size, bool big_endian> | |
1452 | class Mips16_stub_section : public Mips16_stub_section_base | |
1453 | { | |
1454 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
1455 | ||
1456 | public: | |
1457 | Mips16_stub_section(Mips_relobj<size, big_endian>* object, unsigned int shndx) | |
1458 | : object_(object), shndx_(shndx), r_sym_(0), gsym_(NULL), | |
1459 | found_r_mips_none_(false) | |
1460 | { | |
1461 | gold_assert(object->is_mips16_fn_stub_section(shndx) | |
1462 | || object->is_mips16_call_stub_section(shndx) | |
1463 | || object->is_mips16_call_fp_stub_section(shndx)); | |
1464 | } | |
1465 | ||
1466 | // Return the object of this stub section. | |
1467 | Mips_relobj<size, big_endian>* | |
1468 | object() const | |
1469 | { return this->object_; } | |
1470 | ||
1471 | // Return the size of a section. | |
1472 | uint64_t | |
1473 | section_size() const | |
1474 | { return this->object_->section_size(this->shndx_); } | |
1475 | ||
1476 | // Return section index of this stub section. | |
1477 | unsigned int | |
1478 | shndx() const | |
1479 | { return this->shndx_; } | |
1480 | ||
1481 | // Return symbol index, if stub is for a local function. | |
1482 | unsigned int | |
1483 | r_sym() const | |
1484 | { return this->r_sym_; } | |
1485 | ||
1486 | // Return symbol, if stub is for a global function. | |
1487 | Mips_symbol<size>* | |
1488 | gsym() const | |
1489 | { return this->gsym_; } | |
1490 | ||
1491 | // Return whether stub is for a local function. | |
1492 | bool | |
1493 | is_for_local_function() const | |
1494 | { return this->gsym_ == NULL; } | |
1495 | ||
1496 | // This method is called when a new relocation R_TYPE for local symbol R_SYM | |
1497 | // is found in the stub section. Try to find stub target. | |
1498 | void | |
1499 | new_local_reloc_found(unsigned int r_type, unsigned int r_sym) | |
1500 | { | |
1501 | // To find target symbol for this stub, trust the first R_MIPS_NONE | |
1502 | // relocation, if any. Otherwise trust the first relocation, whatever | |
1503 | // its kind. | |
1504 | if (this->found_r_mips_none_) | |
1505 | return; | |
1506 | if (r_type == elfcpp::R_MIPS_NONE) | |
1507 | { | |
1508 | this->r_sym_ = r_sym; | |
1509 | this->gsym_ = NULL; | |
1510 | this->found_r_mips_none_ = true; | |
1511 | } | |
1512 | else if (!is_target_found()) | |
1513 | this->r_sym_ = r_sym; | |
1514 | } | |
1515 | ||
1516 | // This method is called when a new relocation R_TYPE for global symbol GSYM | |
1517 | // is found in the stub section. Try to find stub target. | |
1518 | void | |
1519 | new_global_reloc_found(unsigned int r_type, Mips_symbol<size>* gsym) | |
1520 | { | |
1521 | // To find target symbol for this stub, trust the first R_MIPS_NONE | |
1522 | // relocation, if any. Otherwise trust the first relocation, whatever | |
1523 | // its kind. | |
1524 | if (this->found_r_mips_none_) | |
1525 | return; | |
1526 | if (r_type == elfcpp::R_MIPS_NONE) | |
1527 | { | |
1528 | this->gsym_ = gsym; | |
1529 | this->r_sym_ = 0; | |
1530 | this->found_r_mips_none_ = true; | |
1531 | } | |
1532 | else if (!is_target_found()) | |
1533 | this->gsym_ = gsym; | |
1534 | } | |
1535 | ||
1536 | // Return whether we found the stub target. | |
1537 | bool | |
1538 | is_target_found() const | |
1539 | { return this->r_sym_ != 0 || this->gsym_ != NULL; } | |
1540 | ||
1541 | // Return whether this is a fn stub. | |
1542 | bool | |
1543 | is_fn_stub() const | |
1544 | { return this->object_->is_mips16_fn_stub_section(this->shndx_); } | |
1545 | ||
1546 | // Return whether this is a call stub. | |
1547 | bool | |
1548 | is_call_stub() const | |
1549 | { return this->object_->is_mips16_call_stub_section(this->shndx_); } | |
1550 | ||
1551 | // Return whether this is a call_fp stub. | |
1552 | bool | |
1553 | is_call_fp_stub() const | |
1554 | { return this->object_->is_mips16_call_fp_stub_section(this->shndx_); } | |
1555 | ||
1556 | // Return the output address. | |
1557 | Mips_address | |
1558 | output_address() const | |
1559 | { | |
1560 | return (this->object_->output_section(this->shndx_)->address() | |
1561 | + this->object_->output_section_offset(this->shndx_)); | |
1562 | } | |
1563 | ||
1564 | private: | |
1565 | // The object of this stub section. | |
1566 | Mips_relobj<size, big_endian>* object_; | |
1567 | // The section index of this stub section. | |
1568 | unsigned int shndx_; | |
1569 | // The symbol index, if stub is for a local function. | |
1570 | unsigned int r_sym_; | |
1571 | // The symbol, if stub is for a global function. | |
1572 | Mips_symbol<size>* gsym_; | |
1573 | // True if we found R_MIPS_NONE relocation in this stub. | |
1574 | bool found_r_mips_none_; | |
1575 | }; | |
1576 | ||
1577 | // Mips_relobj class. | |
1578 | ||
1579 | template<int size, bool big_endian> | |
1580 | class Mips_relobj : public Sized_relobj_file<size, big_endian> | |
1581 | { | |
1582 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
1583 | typedef std::map<unsigned int, Mips16_stub_section<size, big_endian>*> | |
1584 | Mips16_stubs_int_map; | |
1585 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
1586 | ||
1587 | public: | |
1588 | Mips_relobj(const std::string& name, Input_file* input_file, off_t offset, | |
1589 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
1590 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
1591 | processor_specific_flags_(0), local_symbol_is_mips16_(), | |
1592 | local_symbol_is_micromips_(), mips16_stub_sections_(), | |
1593 | local_non_16bit_calls_(), local_16bit_calls_(), local_mips16_fn_stubs_(), | |
82e49872 VR |
1594 | local_mips16_call_stubs_(), gp_(0), has_reginfo_section_(false), |
1595 | got_info_(NULL), section_is_mips16_fn_stub_(), | |
1596 | section_is_mips16_call_stub_(), section_is_mips16_call_fp_stub_(), | |
b52717c0 VR |
1597 | pdr_shndx_(-1U), attributes_section_data_(NULL), abiflags_(NULL), |
1598 | gprmask_(0), cprmask1_(0), cprmask2_(0), cprmask3_(0), cprmask4_(0) | |
9810d34d SS |
1599 | { |
1600 | this->is_pic_ = (ehdr.get_e_flags() & elfcpp::EF_MIPS_PIC) != 0; | |
1601 | this->is_n32_ = elfcpp::abi_n32(ehdr.get_e_flags()); | |
9810d34d SS |
1602 | } |
1603 | ||
1604 | ~Mips_relobj() | |
b52717c0 | 1605 | { delete this->attributes_section_data_; } |
9810d34d SS |
1606 | |
1607 | // Downcast a base pointer to a Mips_relobj pointer. This is | |
1608 | // not type-safe but we only use Mips_relobj not the base class. | |
1609 | static Mips_relobj<size, big_endian>* | |
1610 | as_mips_relobj(Relobj* relobj) | |
1611 | { return static_cast<Mips_relobj<size, big_endian>*>(relobj); } | |
1612 | ||
1613 | // Downcast a base pointer to a Mips_relobj pointer. This is | |
1614 | // not type-safe but we only use Mips_relobj not the base class. | |
1615 | static const Mips_relobj<size, big_endian>* | |
1616 | as_mips_relobj(const Relobj* relobj) | |
1617 | { return static_cast<const Mips_relobj<size, big_endian>*>(relobj); } | |
1618 | ||
1619 | // Processor-specific flags in ELF file header. This is valid only after | |
1620 | // reading symbols. | |
1621 | elfcpp::Elf_Word | |
1622 | processor_specific_flags() const | |
1623 | { return this->processor_specific_flags_; } | |
1624 | ||
1625 | // Whether a local symbol is MIPS16 symbol. R_SYM is the symbol table | |
1626 | // index. This is only valid after do_count_local_symbol is called. | |
1627 | bool | |
1628 | local_symbol_is_mips16(unsigned int r_sym) const | |
1629 | { | |
1630 | gold_assert(r_sym < this->local_symbol_is_mips16_.size()); | |
1631 | return this->local_symbol_is_mips16_[r_sym]; | |
1632 | } | |
1633 | ||
1634 | // Whether a local symbol is microMIPS symbol. R_SYM is the symbol table | |
1635 | // index. This is only valid after do_count_local_symbol is called. | |
1636 | bool | |
1637 | local_symbol_is_micromips(unsigned int r_sym) const | |
1638 | { | |
1639 | gold_assert(r_sym < this->local_symbol_is_micromips_.size()); | |
1640 | return this->local_symbol_is_micromips_[r_sym]; | |
1641 | } | |
1642 | ||
1643 | // Get or create MIPS16 stub section. | |
1644 | Mips16_stub_section<size, big_endian>* | |
1645 | get_mips16_stub_section(unsigned int shndx) | |
1646 | { | |
1647 | typename Mips16_stubs_int_map::const_iterator it = | |
1648 | this->mips16_stub_sections_.find(shndx); | |
1649 | if (it != this->mips16_stub_sections_.end()) | |
1650 | return (*it).second; | |
1651 | ||
1652 | Mips16_stub_section<size, big_endian>* stub_section = | |
1653 | new Mips16_stub_section<size, big_endian>(this, shndx); | |
1654 | this->mips16_stub_sections_.insert( | |
1655 | std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>( | |
1656 | stub_section->shndx(), stub_section)); | |
1657 | return stub_section; | |
1658 | } | |
1659 | ||
1660 | // Return MIPS16 fn stub section for local symbol R_SYM, or NULL if this | |
1661 | // object doesn't have fn stub for R_SYM. | |
1662 | Mips16_stub_section<size, big_endian>* | |
1663 | get_local_mips16_fn_stub(unsigned int r_sym) const | |
1664 | { | |
1665 | typename Mips16_stubs_int_map::const_iterator it = | |
1666 | this->local_mips16_fn_stubs_.find(r_sym); | |
1667 | if (it != this->local_mips16_fn_stubs_.end()) | |
1668 | return (*it).second; | |
1669 | return NULL; | |
1670 | } | |
1671 | ||
1672 | // Record that this object has MIPS16 fn stub for local symbol. This method | |
1673 | // is only called if we decided not to discard the stub. | |
1674 | void | |
1675 | add_local_mips16_fn_stub(Mips16_stub_section<size, big_endian>* stub) | |
1676 | { | |
1677 | gold_assert(stub->is_for_local_function()); | |
1678 | unsigned int r_sym = stub->r_sym(); | |
1679 | this->local_mips16_fn_stubs_.insert( | |
1680 | std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>( | |
1681 | r_sym, stub)); | |
1682 | } | |
1683 | ||
1684 | // Return MIPS16 call stub section for local symbol R_SYM, or NULL if this | |
1685 | // object doesn't have call stub for R_SYM. | |
1686 | Mips16_stub_section<size, big_endian>* | |
1687 | get_local_mips16_call_stub(unsigned int r_sym) const | |
1688 | { | |
1689 | typename Mips16_stubs_int_map::const_iterator it = | |
1690 | this->local_mips16_call_stubs_.find(r_sym); | |
1691 | if (it != this->local_mips16_call_stubs_.end()) | |
1692 | return (*it).second; | |
1693 | return NULL; | |
1694 | } | |
1695 | ||
1696 | // Record that this object has MIPS16 call stub for local symbol. This method | |
1697 | // is only called if we decided not to discard the stub. | |
1698 | void | |
1699 | add_local_mips16_call_stub(Mips16_stub_section<size, big_endian>* stub) | |
1700 | { | |
1701 | gold_assert(stub->is_for_local_function()); | |
1702 | unsigned int r_sym = stub->r_sym(); | |
1703 | this->local_mips16_call_stubs_.insert( | |
1704 | std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>( | |
1705 | r_sym, stub)); | |
1706 | } | |
1707 | ||
1708 | // Record that we found "non 16-bit" call relocation against local symbol | |
1709 | // SYMNDX. This reloc would need to refer to a MIPS16 fn stub, if there | |
1710 | // is one. | |
1711 | void | |
1712 | add_local_non_16bit_call(unsigned int symndx) | |
1713 | { this->local_non_16bit_calls_.insert(symndx); } | |
1714 | ||
1715 | // Return true if there is any "non 16-bit" call relocation against local | |
1716 | // symbol SYMNDX in this object. | |
1717 | bool | |
1718 | has_local_non_16bit_call_relocs(unsigned int symndx) | |
1719 | { | |
1720 | return (this->local_non_16bit_calls_.find(symndx) | |
1721 | != this->local_non_16bit_calls_.end()); | |
1722 | } | |
1723 | ||
1724 | // Record that we found 16-bit call relocation R_MIPS16_26 against local | |
1725 | // symbol SYMNDX. Local MIPS16 call or call_fp stubs will only be needed | |
1726 | // if there is some R_MIPS16_26 relocation that refers to the stub symbol. | |
1727 | void | |
1728 | add_local_16bit_call(unsigned int symndx) | |
1729 | { this->local_16bit_calls_.insert(symndx); } | |
1730 | ||
1731 | // Return true if there is any 16-bit call relocation R_MIPS16_26 against local | |
1732 | // symbol SYMNDX in this object. | |
1733 | bool | |
1734 | has_local_16bit_call_relocs(unsigned int symndx) | |
1735 | { | |
1736 | return (this->local_16bit_calls_.find(symndx) | |
1737 | != this->local_16bit_calls_.end()); | |
1738 | } | |
1739 | ||
1740 | // Get gp value that was used to create this object. | |
1741 | Mips_address | |
1742 | gp_value() const | |
1743 | { return this->gp_; } | |
1744 | ||
1745 | // Return whether the object is a PIC object. | |
1746 | bool | |
1747 | is_pic() const | |
1748 | { return this->is_pic_; } | |
1749 | ||
1750 | // Return whether the object uses N32 ABI. | |
1751 | bool | |
1752 | is_n32() const | |
1753 | { return this->is_n32_; } | |
1754 | ||
1755 | // Return whether the object uses N64 ABI. | |
1756 | bool | |
1757 | is_n64() const | |
01b84e25 | 1758 | { return size == 64; } |
9810d34d SS |
1759 | |
1760 | // Return whether the object uses NewABI conventions. | |
1761 | bool | |
1762 | is_newabi() const | |
01b84e25 | 1763 | { return this->is_n32() || this->is_n64(); } |
9810d34d SS |
1764 | |
1765 | // Return Mips_got_info for this object. | |
1766 | Mips_got_info<size, big_endian>* | |
1767 | get_got_info() const | |
1768 | { return this->got_info_; } | |
1769 | ||
1770 | // Return Mips_got_info for this object. Create new info if it doesn't exist. | |
1771 | Mips_got_info<size, big_endian>* | |
1772 | get_or_create_got_info() | |
1773 | { | |
1774 | if (!this->got_info_) | |
1775 | this->got_info_ = new Mips_got_info<size, big_endian>(); | |
1776 | return this->got_info_; | |
1777 | } | |
1778 | ||
1779 | // Set Mips_got_info for this object. | |
1780 | void | |
1781 | set_got_info(Mips_got_info<size, big_endian>* got_info) | |
1782 | { this->got_info_ = got_info; } | |
1783 | ||
1784 | // Whether a section SHDNX is a MIPS16 stub section. This is only valid | |
1785 | // after do_read_symbols is called. | |
1786 | bool | |
1787 | is_mips16_stub_section(unsigned int shndx) | |
1788 | { | |
1789 | return (is_mips16_fn_stub_section(shndx) | |
1790 | || is_mips16_call_stub_section(shndx) | |
1791 | || is_mips16_call_fp_stub_section(shndx)); | |
1792 | } | |
1793 | ||
1794 | // Return TRUE if relocations in section SHNDX can refer directly to a | |
1795 | // MIPS16 function rather than to a hard-float stub. This is only valid | |
1796 | // after do_read_symbols is called. | |
1797 | bool | |
1798 | section_allows_mips16_refs(unsigned int shndx) | |
1799 | { | |
1800 | return (this->is_mips16_stub_section(shndx) || shndx == this->pdr_shndx_); | |
1801 | } | |
1802 | ||
1803 | // Whether a section SHDNX is a MIPS16 fn stub section. This is only valid | |
1804 | // after do_read_symbols is called. | |
1805 | bool | |
1806 | is_mips16_fn_stub_section(unsigned int shndx) | |
1807 | { | |
1808 | gold_assert(shndx < this->section_is_mips16_fn_stub_.size()); | |
1809 | return this->section_is_mips16_fn_stub_[shndx]; | |
1810 | } | |
1811 | ||
1812 | // Whether a section SHDNX is a MIPS16 call stub section. This is only valid | |
1813 | // after do_read_symbols is called. | |
1814 | bool | |
1815 | is_mips16_call_stub_section(unsigned int shndx) | |
1816 | { | |
1817 | gold_assert(shndx < this->section_is_mips16_call_stub_.size()); | |
1818 | return this->section_is_mips16_call_stub_[shndx]; | |
1819 | } | |
1820 | ||
1821 | // Whether a section SHDNX is a MIPS16 call_fp stub section. This is only | |
1822 | // valid after do_read_symbols is called. | |
1823 | bool | |
1824 | is_mips16_call_fp_stub_section(unsigned int shndx) | |
1825 | { | |
1826 | gold_assert(shndx < this->section_is_mips16_call_fp_stub_.size()); | |
1827 | return this->section_is_mips16_call_fp_stub_[shndx]; | |
1828 | } | |
1829 | ||
1830 | // Discard MIPS16 stub secions that are not needed. | |
1831 | void | |
1832 | discard_mips16_stub_sections(Symbol_table* symtab); | |
1833 | ||
82e49872 VR |
1834 | // Return whether there is a .reginfo section. |
1835 | bool | |
1836 | has_reginfo_section() const | |
1837 | { return this->has_reginfo_section_; } | |
1838 | ||
9810d34d SS |
1839 | // Return gprmask from the .reginfo section of this object. |
1840 | Valtype | |
1841 | gprmask() const | |
1842 | { return this->gprmask_; } | |
1843 | ||
1844 | // Return cprmask1 from the .reginfo section of this object. | |
1845 | Valtype | |
1846 | cprmask1() const | |
1847 | { return this->cprmask1_; } | |
1848 | ||
1849 | // Return cprmask2 from the .reginfo section of this object. | |
1850 | Valtype | |
1851 | cprmask2() const | |
1852 | { return this->cprmask2_; } | |
1853 | ||
1854 | // Return cprmask3 from the .reginfo section of this object. | |
1855 | Valtype | |
1856 | cprmask3() const | |
1857 | { return this->cprmask3_; } | |
1858 | ||
1859 | // Return cprmask4 from the .reginfo section of this object. | |
1860 | Valtype | |
1861 | cprmask4() const | |
1862 | { return this->cprmask4_; } | |
1863 | ||
b52717c0 VR |
1864 | // This is the contents of the .MIPS.abiflags section if there is one. |
1865 | Mips_abiflags<big_endian>* | |
1866 | abiflags() | |
1867 | { return this->abiflags_; } | |
1868 | ||
1869 | // This is the contents of the .gnu.attribute section if there is one. | |
1870 | const Attributes_section_data* | |
1871 | attributes_section_data() const | |
1872 | { return this->attributes_section_data_; } | |
1873 | ||
9810d34d SS |
1874 | protected: |
1875 | // Count the local symbols. | |
1876 | void | |
1877 | do_count_local_symbols(Stringpool_template<char>*, | |
1878 | Stringpool_template<char>*); | |
1879 | ||
1880 | // Read the symbol information. | |
1881 | void | |
1882 | do_read_symbols(Read_symbols_data* sd); | |
1883 | ||
1884 | private: | |
47a9f4fc VR |
1885 | // The name of the options section. |
1886 | const char* mips_elf_options_section_name() | |
1887 | { return this->is_newabi() ? ".MIPS.options" : ".options"; } | |
1888 | ||
9810d34d SS |
1889 | // processor-specific flags in ELF file header. |
1890 | elfcpp::Elf_Word processor_specific_flags_; | |
1891 | ||
1892 | // Bit vector to tell if a local symbol is a MIPS16 symbol or not. | |
1893 | // This is only valid after do_count_local_symbol is called. | |
1894 | std::vector<bool> local_symbol_is_mips16_; | |
1895 | ||
1896 | // Bit vector to tell if a local symbol is a microMIPS symbol or not. | |
1897 | // This is only valid after do_count_local_symbol is called. | |
1898 | std::vector<bool> local_symbol_is_micromips_; | |
1899 | ||
1900 | // Map from section index to the MIPS16 stub for that section. This contains | |
1901 | // all stubs found in this object. | |
1902 | Mips16_stubs_int_map mips16_stub_sections_; | |
1903 | ||
1904 | // Local symbols that have "non 16-bit" call relocation. This relocation | |
1905 | // would need to refer to a MIPS16 fn stub, if there is one. | |
1906 | std::set<unsigned int> local_non_16bit_calls_; | |
1907 | ||
1908 | // Local symbols that have 16-bit call relocation R_MIPS16_26. Local MIPS16 | |
1909 | // call or call_fp stubs will only be needed if there is some R_MIPS16_26 | |
1910 | // relocation that refers to the stub symbol. | |
1911 | std::set<unsigned int> local_16bit_calls_; | |
1912 | ||
1913 | // Map from local symbol index to the MIPS16 fn stub for that symbol. | |
1914 | // This contains only the stubs that we decided not to discard. | |
1915 | Mips16_stubs_int_map local_mips16_fn_stubs_; | |
1916 | ||
1917 | // Map from local symbol index to the MIPS16 call stub for that symbol. | |
1918 | // This contains only the stubs that we decided not to discard. | |
1919 | Mips16_stubs_int_map local_mips16_call_stubs_; | |
1920 | ||
1921 | // gp value that was used to create this object. | |
1922 | Mips_address gp_; | |
1923 | // Whether the object is a PIC object. | |
1924 | bool is_pic_ : 1; | |
1925 | // Whether the object uses N32 ABI. | |
1926 | bool is_n32_ : 1; | |
82e49872 VR |
1927 | // Whether the object contains a .reginfo section. |
1928 | bool has_reginfo_section_ : 1; | |
9810d34d SS |
1929 | // The Mips_got_info for this object. |
1930 | Mips_got_info<size, big_endian>* got_info_; | |
1931 | ||
1932 | // Bit vector to tell if a section is a MIPS16 fn stub section or not. | |
1933 | // This is only valid after do_read_symbols is called. | |
1934 | std::vector<bool> section_is_mips16_fn_stub_; | |
1935 | ||
1936 | // Bit vector to tell if a section is a MIPS16 call stub section or not. | |
1937 | // This is only valid after do_read_symbols is called. | |
1938 | std::vector<bool> section_is_mips16_call_stub_; | |
1939 | ||
1940 | // Bit vector to tell if a section is a MIPS16 call_fp stub section or not. | |
1941 | // This is only valid after do_read_symbols is called. | |
1942 | std::vector<bool> section_is_mips16_call_fp_stub_; | |
1943 | ||
1944 | // .pdr section index. | |
1945 | unsigned int pdr_shndx_; | |
1946 | ||
b52717c0 VR |
1947 | // Object attributes if there is a .gnu.attributes section or NULL. |
1948 | Attributes_section_data* attributes_section_data_; | |
1949 | ||
1950 | // Object abiflags if there is a .MIPS.abiflags section or NULL. | |
1951 | Mips_abiflags<big_endian>* abiflags_; | |
1952 | ||
9810d34d SS |
1953 | // gprmask from the .reginfo section of this object. |
1954 | Valtype gprmask_; | |
1955 | // cprmask1 from the .reginfo section of this object. | |
1956 | Valtype cprmask1_; | |
1957 | // cprmask2 from the .reginfo section of this object. | |
1958 | Valtype cprmask2_; | |
1959 | // cprmask3 from the .reginfo section of this object. | |
1960 | Valtype cprmask3_; | |
1961 | // cprmask4 from the .reginfo section of this object. | |
1962 | Valtype cprmask4_; | |
1963 | }; | |
1964 | ||
1965 | // Mips_output_data_got class. | |
1966 | ||
1967 | template<int size, bool big_endian> | |
1968 | class Mips_output_data_got : public Output_data_got<size, big_endian> | |
1969 | { | |
1970 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
1971 | typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> | |
1972 | Reloc_section; | |
1973 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
1974 | ||
1975 | public: | |
1976 | Mips_output_data_got(Target_mips<size, big_endian>* target, | |
1977 | Symbol_table* symtab, Layout* layout) | |
1978 | : Output_data_got<size, big_endian>(), target_(target), | |
1979 | symbol_table_(symtab), layout_(layout), static_relocs_(), got_view_(NULL), | |
1980 | first_global_got_dynsym_index_(-1U), primary_got_(NULL), | |
1981 | secondary_got_relocs_() | |
1982 | { | |
1983 | this->master_got_info_ = new Mips_got_info<size, big_endian>(); | |
1984 | this->set_addralign(16); | |
1985 | } | |
1986 | ||
1987 | // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol | |
1988 | // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT. | |
1989 | void | |
1990 | record_local_got_symbol(Mips_relobj<size, big_endian>* object, | |
1991 | unsigned int symndx, Mips_address addend, | |
47a9f4fc VR |
1992 | unsigned int r_type, unsigned int shndx, |
1993 | bool is_section_symbol) | |
9810d34d SS |
1994 | { |
1995 | this->master_got_info_->record_local_got_symbol(object, symndx, addend, | |
47a9f4fc VR |
1996 | r_type, shndx, |
1997 | is_section_symbol); | |
9810d34d SS |
1998 | } |
1999 | ||
2000 | // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM, | |
2001 | // in OBJECT. FOR_CALL is true if the caller is only interested in | |
2002 | // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic | |
2003 | // relocation. | |
2004 | void | |
2005 | record_global_got_symbol(Mips_symbol<size>* mips_sym, | |
2006 | Mips_relobj<size, big_endian>* object, | |
2007 | unsigned int r_type, bool dyn_reloc, bool for_call) | |
2008 | { | |
2009 | this->master_got_info_->record_global_got_symbol(mips_sym, object, r_type, | |
2010 | dyn_reloc, for_call); | |
2011 | } | |
2012 | ||
2013 | // Record that OBJECT has a page relocation against symbol SYMNDX and | |
2014 | // that ADDEND is the addend for that relocation. | |
2015 | void | |
2016 | record_got_page_entry(Mips_relobj<size, big_endian>* object, | |
2017 | unsigned int symndx, int addend) | |
2018 | { this->master_got_info_->record_got_page_entry(object, symndx, addend); } | |
2019 | ||
2020 | // Add a static entry for the GOT entry at OFFSET. GSYM is a global | |
2021 | // symbol and R_TYPE is the code of a dynamic relocation that needs to be | |
2022 | // applied in a static link. | |
2023 | void | |
2024 | add_static_reloc(unsigned int got_offset, unsigned int r_type, | |
2025 | Mips_symbol<size>* gsym) | |
2026 | { this->static_relocs_.push_back(Static_reloc(got_offset, r_type, gsym)); } | |
2027 | ||
2028 | // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object | |
2029 | // defining a local symbol with INDEX. R_TYPE is the code of a dynamic | |
2030 | // relocation that needs to be applied in a static link. | |
2031 | void | |
2032 | add_static_reloc(unsigned int got_offset, unsigned int r_type, | |
2033 | Sized_relobj_file<size, big_endian>* relobj, | |
2034 | unsigned int index) | |
2035 | { | |
2036 | this->static_relocs_.push_back(Static_reloc(got_offset, r_type, relobj, | |
2037 | index)); | |
2038 | } | |
2039 | ||
2040 | // Record that global symbol GSYM has R_TYPE dynamic relocation in the | |
2041 | // secondary GOT at OFFSET. | |
2042 | void | |
2043 | add_secondary_got_reloc(unsigned int got_offset, unsigned int r_type, | |
2044 | Mips_symbol<size>* gsym) | |
2045 | { | |
2046 | this->secondary_got_relocs_.push_back(Static_reloc(got_offset, | |
2047 | r_type, gsym)); | |
2048 | } | |
2049 | ||
2050 | // Update GOT entry at OFFSET with VALUE. | |
2051 | void | |
2052 | update_got_entry(unsigned int offset, Mips_address value) | |
2053 | { | |
2054 | elfcpp::Swap<size, big_endian>::writeval(this->got_view_ + offset, value); | |
2055 | } | |
2056 | ||
2057 | // Return the number of entries in local part of the GOT. This includes | |
2058 | // local entries, page entries and 2 reserved entries. | |
2059 | unsigned int | |
2060 | get_local_gotno() const | |
2061 | { | |
2062 | if (!this->multi_got()) | |
2063 | { | |
2064 | return (2 + this->master_got_info_->local_gotno() | |
2065 | + this->master_got_info_->page_gotno()); | |
2066 | } | |
2067 | else | |
2068 | return 2 + this->primary_got_->local_gotno() + this->primary_got_->page_gotno(); | |
2069 | } | |
2070 | ||
2071 | // Return dynamic symbol table index of the first symbol with global GOT | |
2072 | // entry. | |
2073 | unsigned int | |
2074 | first_global_got_dynsym_index() const | |
2075 | { return this->first_global_got_dynsym_index_; } | |
2076 | ||
2077 | // Set dynamic symbol table index of the first symbol with global GOT entry. | |
2078 | void | |
2079 | set_first_global_got_dynsym_index(unsigned int index) | |
2080 | { this->first_global_got_dynsym_index_ = index; } | |
2081 | ||
2082 | // Lay out the GOT. Add local, global and TLS entries. If GOT is | |
2083 | // larger than 64K, create multi-GOT. | |
2084 | void | |
2085 | lay_out_got(Layout* layout, Symbol_table* symtab, | |
2086 | const Input_objects* input_objects); | |
2087 | ||
2088 | // Create multi-GOT. For every GOT, add local, global and TLS entries. | |
2089 | void | |
2090 | lay_out_multi_got(Layout* layout, const Input_objects* input_objects); | |
2091 | ||
2092 | // Attempt to merge GOTs of different input objects. | |
2093 | void | |
2094 | merge_gots(const Input_objects* input_objects); | |
2095 | ||
2096 | // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if | |
2097 | // this would lead to overflow, true if they were merged successfully. | |
2098 | bool | |
2099 | merge_got_with(Mips_got_info<size, big_endian>* from, | |
2100 | Mips_relobj<size, big_endian>* object, | |
2101 | Mips_got_info<size, big_endian>* to); | |
2102 | ||
2103 | // Return the offset of GOT page entry for VALUE. For multi-GOT links, | |
2104 | // use OBJECT's GOT. | |
2105 | unsigned int | |
2106 | get_got_page_offset(Mips_address value, | |
2107 | const Mips_relobj<size, big_endian>* object) | |
2108 | { | |
2109 | Mips_got_info<size, big_endian>* g = (!this->multi_got() | |
2110 | ? this->master_got_info_ | |
2111 | : object->get_got_info()); | |
2112 | gold_assert(g != NULL); | |
2113 | return g->get_got_page_offset(value, this); | |
2114 | } | |
2115 | ||
2116 | // Return the GOT offset of type GOT_TYPE of the global symbol | |
2117 | // GSYM. For multi-GOT links, use OBJECT's GOT. | |
2118 | unsigned int got_offset(const Symbol* gsym, unsigned int got_type, | |
2119 | Mips_relobj<size, big_endian>* object) const | |
2120 | { | |
2121 | if (!this->multi_got()) | |
2122 | return gsym->got_offset(got_type); | |
2123 | else | |
2124 | { | |
2125 | Mips_got_info<size, big_endian>* g = object->get_got_info(); | |
2126 | gold_assert(g != NULL); | |
2127 | return gsym->got_offset(g->multigot_got_type(got_type)); | |
2128 | } | |
2129 | } | |
2130 | ||
2131 | // Return the GOT offset of type GOT_TYPE of the local symbol | |
2132 | // SYMNDX. | |
2133 | unsigned int | |
2134 | got_offset(unsigned int symndx, unsigned int got_type, | |
47a9f4fc VR |
2135 | Sized_relobj_file<size, big_endian>* object, |
2136 | uint64_t addend) const | |
2137 | { return object->local_got_offset(symndx, got_type, addend); } | |
9810d34d SS |
2138 | |
2139 | // Return the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT. | |
2140 | unsigned int | |
2141 | tls_ldm_offset(Mips_relobj<size, big_endian>* object) const | |
2142 | { | |
2143 | Mips_got_info<size, big_endian>* g = (!this->multi_got() | |
2144 | ? this->master_got_info_ | |
2145 | : object->get_got_info()); | |
2146 | gold_assert(g != NULL); | |
2147 | return g->tls_ldm_offset(); | |
2148 | } | |
2149 | ||
2150 | // Set the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT. | |
2151 | void | |
2152 | set_tls_ldm_offset(unsigned int tls_ldm_offset, | |
2153 | Mips_relobj<size, big_endian>* object) | |
2154 | { | |
2155 | Mips_got_info<size, big_endian>* g = (!this->multi_got() | |
2156 | ? this->master_got_info_ | |
2157 | : object->get_got_info()); | |
2158 | gold_assert(g != NULL); | |
2159 | g->set_tls_ldm_offset(tls_ldm_offset); | |
2160 | } | |
2161 | ||
2162 | // Return true for multi-GOT links. | |
2163 | bool | |
2164 | multi_got() const | |
2165 | { return this->primary_got_ != NULL; } | |
2166 | ||
2167 | // Return the offset of OBJECT's GOT from the start of .got section. | |
2168 | unsigned int | |
2169 | get_got_offset(const Mips_relobj<size, big_endian>* object) | |
2170 | { | |
2171 | if (!this->multi_got()) | |
2172 | return 0; | |
2173 | else | |
2174 | { | |
2175 | Mips_got_info<size, big_endian>* g = object->get_got_info(); | |
2176 | return g != NULL ? g->offset() : 0; | |
2177 | } | |
2178 | } | |
2179 | ||
2180 | // Create global GOT entries that should be in the GGA_RELOC_ONLY area. | |
2181 | void | |
2182 | add_reloc_only_entries() | |
2183 | { this->master_got_info_->add_reloc_only_entries(this); } | |
2184 | ||
2185 | // Return offset of the primary GOT's entry for global symbol. | |
2186 | unsigned int | |
2187 | get_primary_got_offset(const Mips_symbol<size>* sym) const | |
2188 | { | |
2189 | gold_assert(sym->global_got_area() != GGA_NONE); | |
2190 | return (this->get_local_gotno() + sym->dynsym_index() | |
2191 | - this->first_global_got_dynsym_index()) * size/8; | |
2192 | } | |
2193 | ||
2194 | // For the entry at offset GOT_OFFSET, return its offset from the gp. | |
2195 | // Input argument GOT_OFFSET is always global offset from the start of | |
2196 | // .got section, for both single and multi-GOT links. | |
2197 | // For single GOT links, this returns GOT_OFFSET - 0x7FF0. For multi-GOT | |
2198 | // links, the return value is object_got_offset - 0x7FF0, where | |
2199 | // object_got_offset is offset in the OBJECT's GOT. | |
2200 | int | |
2201 | gp_offset(unsigned int got_offset, | |
2202 | const Mips_relobj<size, big_endian>* object) const | |
2203 | { | |
2204 | return (this->address() + got_offset | |
2205 | - this->target_->adjusted_gp_value(object)); | |
2206 | } | |
2207 | ||
2208 | protected: | |
2209 | // Write out the GOT table. | |
2210 | void | |
2211 | do_write(Output_file*); | |
2212 | ||
2213 | private: | |
2214 | ||
2215 | // This class represent dynamic relocations that need to be applied by | |
2216 | // gold because we are using TLS relocations in a static link. | |
2217 | class Static_reloc | |
2218 | { | |
2219 | public: | |
2220 | Static_reloc(unsigned int got_offset, unsigned int r_type, | |
2221 | Mips_symbol<size>* gsym) | |
2222 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(true) | |
2223 | { this->u_.global.symbol = gsym; } | |
2224 | ||
2225 | Static_reloc(unsigned int got_offset, unsigned int r_type, | |
2226 | Sized_relobj_file<size, big_endian>* relobj, unsigned int index) | |
2227 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(false) | |
2228 | { | |
2229 | this->u_.local.relobj = relobj; | |
2230 | this->u_.local.index = index; | |
2231 | } | |
2232 | ||
2233 | // Return the GOT offset. | |
2234 | unsigned int | |
2235 | got_offset() const | |
2236 | { return this->got_offset_; } | |
2237 | ||
2238 | // Relocation type. | |
2239 | unsigned int | |
2240 | r_type() const | |
2241 | { return this->r_type_; } | |
2242 | ||
2243 | // Whether the symbol is global or not. | |
2244 | bool | |
2245 | symbol_is_global() const | |
2246 | { return this->symbol_is_global_; } | |
2247 | ||
2248 | // For a relocation against a global symbol, the global symbol. | |
2249 | Mips_symbol<size>* | |
2250 | symbol() const | |
2251 | { | |
2252 | gold_assert(this->symbol_is_global_); | |
2253 | return this->u_.global.symbol; | |
2254 | } | |
2255 | ||
2256 | // For a relocation against a local symbol, the defining object. | |
2257 | Sized_relobj_file<size, big_endian>* | |
2258 | relobj() const | |
2259 | { | |
2260 | gold_assert(!this->symbol_is_global_); | |
2261 | return this->u_.local.relobj; | |
2262 | } | |
2263 | ||
2264 | // For a relocation against a local symbol, the local symbol index. | |
2265 | unsigned int | |
2266 | index() const | |
2267 | { | |
2268 | gold_assert(!this->symbol_is_global_); | |
2269 | return this->u_.local.index; | |
2270 | } | |
2271 | ||
2272 | private: | |
2273 | // GOT offset of the entry to which this relocation is applied. | |
2274 | unsigned int got_offset_; | |
2275 | // Type of relocation. | |
2276 | unsigned int r_type_; | |
2277 | // Whether this relocation is against a global symbol. | |
2278 | bool symbol_is_global_; | |
2279 | // A global or local symbol. | |
2280 | union | |
2281 | { | |
2282 | struct | |
2283 | { | |
2284 | // For a global symbol, the symbol itself. | |
2285 | Mips_symbol<size>* symbol; | |
2286 | } global; | |
2287 | struct | |
2288 | { | |
2289 | // For a local symbol, the object defining object. | |
2290 | Sized_relobj_file<size, big_endian>* relobj; | |
2291 | // For a local symbol, the symbol index. | |
2292 | unsigned int index; | |
2293 | } local; | |
2294 | } u_; | |
2295 | }; | |
2296 | ||
2297 | // The target. | |
2298 | Target_mips<size, big_endian>* target_; | |
2299 | // The symbol table. | |
2300 | Symbol_table* symbol_table_; | |
2301 | // The layout. | |
2302 | Layout* layout_; | |
2303 | // Static relocs to be applied to the GOT. | |
2304 | std::vector<Static_reloc> static_relocs_; | |
2305 | // .got section view. | |
2306 | unsigned char* got_view_; | |
2307 | // The dynamic symbol table index of the first symbol with global GOT entry. | |
2308 | unsigned int first_global_got_dynsym_index_; | |
2309 | // The master GOT information. | |
2310 | Mips_got_info<size, big_endian>* master_got_info_; | |
2311 | // The primary GOT information. | |
2312 | Mips_got_info<size, big_endian>* primary_got_; | |
2313 | // Secondary GOT fixups. | |
2314 | std::vector<Static_reloc> secondary_got_relocs_; | |
2315 | }; | |
2316 | ||
2317 | // A class to handle LA25 stubs - non-PIC interface to a PIC function. There are | |
2318 | // two ways of creating these interfaces. The first is to add: | |
2319 | // | |
2320 | // lui $25,%hi(func) | |
2321 | // j func | |
2322 | // addiu $25,$25,%lo(func) | |
2323 | // | |
2324 | // to a separate trampoline section. The second is to add: | |
2325 | // | |
2326 | // lui $25,%hi(func) | |
2327 | // addiu $25,$25,%lo(func) | |
2328 | // | |
2329 | // immediately before a PIC function "func", but only if a function is at the | |
2330 | // beginning of the section, and the section is not too heavily aligned (i.e we | |
2331 | // would need to add no more than 2 nops before the stub.) | |
2332 | // | |
2333 | // We only create stubs of the first type. | |
2334 | ||
2335 | template<int size, bool big_endian> | |
2336 | class Mips_output_data_la25_stub : public Output_section_data | |
2337 | { | |
2338 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
2339 | ||
2340 | public: | |
2341 | Mips_output_data_la25_stub() | |
2342 | : Output_section_data(size == 32 ? 4 : 8), symbols_() | |
2343 | { } | |
2344 | ||
2345 | // Create LA25 stub for a symbol. | |
2346 | void | |
2347 | create_la25_stub(Symbol_table* symtab, Target_mips<size, big_endian>* target, | |
2348 | Mips_symbol<size>* gsym); | |
2349 | ||
2350 | // Return output address of a stub. | |
2351 | Mips_address | |
2352 | stub_address(const Mips_symbol<size>* sym) const | |
2353 | { | |
2354 | gold_assert(sym->has_la25_stub()); | |
2355 | return this->address() + sym->la25_stub_offset(); | |
2356 | } | |
2357 | ||
2358 | protected: | |
2359 | void | |
2360 | do_adjust_output_section(Output_section* os) | |
2361 | { os->set_entsize(0); } | |
2362 | ||
2363 | private: | |
2364 | // Template for standard LA25 stub. | |
2365 | static const uint32_t la25_stub_entry[]; | |
2366 | // Template for microMIPS LA25 stub. | |
2367 | static const uint32_t la25_stub_micromips_entry[]; | |
2368 | ||
2369 | // Set the final size. | |
2370 | void | |
2371 | set_final_data_size() | |
2372 | { this->set_data_size(this->symbols_.size() * 16); } | |
2373 | ||
2374 | // Create a symbol for SYM stub's value and size, to help make the | |
2375 | // disassembly easier to read. | |
2376 | void | |
2377 | create_stub_symbol(Mips_symbol<size>* sym, Symbol_table* symtab, | |
2378 | Target_mips<size, big_endian>* target, uint64_t symsize); | |
2379 | ||
1a08ae21 VR |
2380 | // Write to a map file. |
2381 | void | |
2382 | do_print_to_mapfile(Mapfile* mapfile) const | |
2383 | { mapfile->print_output_data(this, _(".LA25.stubs")); } | |
2384 | ||
9810d34d SS |
2385 | // Write out the LA25 stub section. |
2386 | void | |
2387 | do_write(Output_file*); | |
2388 | ||
2389 | // Symbols that have LA25 stubs. | |
15eb1beb | 2390 | std::vector<Mips_symbol<size>*> symbols_; |
9810d34d SS |
2391 | }; |
2392 | ||
47a9f4fc VR |
2393 | // MIPS-specific relocation writer. |
2394 | ||
2395 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
2396 | struct Mips_output_reloc_writer; | |
2397 | ||
2398 | template<int sh_type, bool dynamic, bool big_endian> | |
2399 | struct Mips_output_reloc_writer<sh_type, dynamic, 32, big_endian> | |
2400 | { | |
2401 | typedef Output_reloc<sh_type, dynamic, 32, big_endian> Output_reloc_type; | |
2402 | typedef std::vector<Output_reloc_type> Relocs; | |
2403 | ||
2404 | static void | |
2405 | write(typename Relocs::const_iterator p, unsigned char* pov) | |
2406 | { p->write(pov); } | |
2407 | }; | |
2408 | ||
2409 | template<int sh_type, bool dynamic, bool big_endian> | |
2410 | struct Mips_output_reloc_writer<sh_type, dynamic, 64, big_endian> | |
2411 | { | |
2412 | typedef Output_reloc<sh_type, dynamic, 64, big_endian> Output_reloc_type; | |
2413 | typedef std::vector<Output_reloc_type> Relocs; | |
2414 | ||
2415 | static void | |
2416 | write(typename Relocs::const_iterator p, unsigned char* pov) | |
2417 | { | |
2418 | elfcpp::Mips64_rel_write<big_endian> orel(pov); | |
2419 | orel.put_r_offset(p->get_address()); | |
2420 | orel.put_r_sym(p->get_symbol_index()); | |
2421 | orel.put_r_ssym(RSS_UNDEF); | |
2422 | orel.put_r_type(p->type()); | |
2423 | if (p->type() == elfcpp::R_MIPS_REL32) | |
2424 | orel.put_r_type2(elfcpp::R_MIPS_64); | |
2425 | else | |
2426 | orel.put_r_type2(elfcpp::R_MIPS_NONE); | |
2427 | orel.put_r_type3(elfcpp::R_MIPS_NONE); | |
2428 | } | |
2429 | }; | |
2430 | ||
2431 | template<int sh_type, bool dynamic, int size, bool big_endian> | |
2432 | class Mips_output_data_reloc : public Output_data_reloc<sh_type, dynamic, | |
2433 | size, big_endian> | |
2434 | { | |
2435 | public: | |
2436 | Mips_output_data_reloc(bool sort_relocs) | |
2437 | : Output_data_reloc<sh_type, dynamic, size, big_endian>(sort_relocs) | |
2438 | { } | |
2439 | ||
2440 | protected: | |
2441 | // Write out the data. | |
2442 | void | |
2443 | do_write(Output_file* of) | |
2444 | { | |
2445 | typedef Mips_output_reloc_writer<sh_type, dynamic, size, | |
2446 | big_endian> Writer; | |
2447 | this->template do_write_generic<Writer>(of); | |
2448 | } | |
2449 | }; | |
2450 | ||
2451 | ||
9810d34d SS |
2452 | // A class to handle the PLT data. |
2453 | ||
2454 | template<int size, bool big_endian> | |
2455 | class Mips_output_data_plt : public Output_section_data | |
2456 | { | |
2457 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
47a9f4fc VR |
2458 | typedef Mips_output_data_reloc<elfcpp::SHT_REL, true, |
2459 | size, big_endian> Reloc_section; | |
9810d34d SS |
2460 | |
2461 | public: | |
2462 | // Create the PLT section. The ordinary .got section is an argument, | |
2463 | // since we need to refer to the start. | |
2464 | Mips_output_data_plt(Layout* layout, Output_data_space* got_plt, | |
2465 | Target_mips<size, big_endian>* target) | |
2466 | : Output_section_data(size == 32 ? 4 : 8), got_plt_(got_plt), symbols_(), | |
2467 | plt_mips_offset_(0), plt_comp_offset_(0), plt_header_size_(0), | |
2468 | target_(target) | |
2469 | { | |
2470 | this->rel_ = new Reloc_section(false); | |
2471 | layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL, | |
2472 | elfcpp::SHF_ALLOC, this->rel_, | |
2473 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
2474 | } | |
2475 | ||
2476 | // Add an entry to the PLT for a symbol referenced by r_type relocation. | |
2477 | void | |
2478 | add_entry(Mips_symbol<size>* gsym, unsigned int r_type); | |
2479 | ||
2480 | // Return the .rel.plt section data. | |
04bc2a28 | 2481 | Reloc_section* |
9810d34d SS |
2482 | rel_plt() const |
2483 | { return this->rel_; } | |
2484 | ||
2485 | // Return the number of PLT entries. | |
2486 | unsigned int | |
2487 | entry_count() const | |
2488 | { return this->symbols_.size(); } | |
2489 | ||
2490 | // Return the offset of the first non-reserved PLT entry. | |
2491 | unsigned int | |
2492 | first_plt_entry_offset() const | |
2493 | { return sizeof(plt0_entry_o32); } | |
2494 | ||
2495 | // Return the size of a PLT entry. | |
2496 | unsigned int | |
2497 | plt_entry_size() const | |
2498 | { return sizeof(plt_entry); } | |
2499 | ||
2500 | // Set final PLT offsets. For each symbol, determine whether standard or | |
2501 | // compressed (MIPS16 or microMIPS) PLT entry is used. | |
2502 | void | |
2503 | set_plt_offsets(); | |
2504 | ||
2505 | // Return the offset of the first standard PLT entry. | |
2506 | unsigned int | |
2507 | first_mips_plt_offset() const | |
2508 | { return this->plt_header_size_; } | |
2509 | ||
2510 | // Return the offset of the first compressed PLT entry. | |
2511 | unsigned int | |
2512 | first_comp_plt_offset() const | |
2513 | { return this->plt_header_size_ + this->plt_mips_offset_; } | |
2514 | ||
2515 | // Return whether there are any standard PLT entries. | |
2516 | bool | |
2517 | has_standard_entries() const | |
2518 | { return this->plt_mips_offset_ > 0; } | |
2519 | ||
2520 | // Return the output address of standard PLT entry. | |
2521 | Mips_address | |
2522 | mips_entry_address(const Mips_symbol<size>* sym) const | |
2523 | { | |
2524 | gold_assert (sym->has_mips_plt_offset()); | |
2525 | return (this->address() + this->first_mips_plt_offset() | |
2526 | + sym->mips_plt_offset()); | |
2527 | } | |
2528 | ||
2529 | // Return the output address of compressed (MIPS16 or microMIPS) PLT entry. | |
2530 | Mips_address | |
2531 | comp_entry_address(const Mips_symbol<size>* sym) const | |
2532 | { | |
2533 | gold_assert (sym->has_comp_plt_offset()); | |
2534 | return (this->address() + this->first_comp_plt_offset() | |
2535 | + sym->comp_plt_offset()); | |
2536 | } | |
2537 | ||
2538 | protected: | |
2539 | void | |
2540 | do_adjust_output_section(Output_section* os) | |
2541 | { os->set_entsize(0); } | |
2542 | ||
2543 | // Write to a map file. | |
2544 | void | |
2545 | do_print_to_mapfile(Mapfile* mapfile) const | |
2546 | { mapfile->print_output_data(this, _(".plt")); } | |
2547 | ||
2548 | private: | |
2549 | // Template for the first PLT entry. | |
2550 | static const uint32_t plt0_entry_o32[]; | |
2551 | static const uint32_t plt0_entry_n32[]; | |
2552 | static const uint32_t plt0_entry_n64[]; | |
2553 | static const uint32_t plt0_entry_micromips_o32[]; | |
2554 | static const uint32_t plt0_entry_micromips32_o32[]; | |
2555 | ||
2556 | // Template for subsequent PLT entries. | |
2557 | static const uint32_t plt_entry[]; | |
f5b11759 | 2558 | static const uint32_t plt_entry_r6[]; |
9810d34d SS |
2559 | static const uint32_t plt_entry_mips16_o32[]; |
2560 | static const uint32_t plt_entry_micromips_o32[]; | |
2561 | static const uint32_t plt_entry_micromips32_o32[]; | |
2562 | ||
2563 | // Set the final size. | |
2564 | void | |
2565 | set_final_data_size() | |
2566 | { | |
2567 | this->set_data_size(this->plt_header_size_ + this->plt_mips_offset_ | |
2568 | + this->plt_comp_offset_); | |
2569 | } | |
2570 | ||
2571 | // Write out the PLT data. | |
2572 | void | |
2573 | do_write(Output_file*); | |
2574 | ||
2575 | // Return whether the plt header contains microMIPS code. For the sake of | |
2576 | // cache alignment always use a standard header whenever any standard entries | |
2577 | // are present even if microMIPS entries are present as well. This also lets | |
2578 | // the microMIPS header rely on the value of $v0 only set by microMIPS | |
2579 | // entries, for a small size reduction. | |
2580 | bool | |
2581 | is_plt_header_compressed() const | |
2582 | { | |
2583 | gold_assert(this->plt_mips_offset_ + this->plt_comp_offset_ != 0); | |
2584 | return this->target_->is_output_micromips() && this->plt_mips_offset_ == 0; | |
2585 | } | |
2586 | ||
2587 | // Return the size of the PLT header. | |
2588 | unsigned int | |
2589 | get_plt_header_size() const | |
2590 | { | |
2591 | if (this->target_->is_output_n64()) | |
2592 | return 4 * sizeof(plt0_entry_n64) / sizeof(plt0_entry_n64[0]); | |
2593 | else if (this->target_->is_output_n32()) | |
2594 | return 4 * sizeof(plt0_entry_n32) / sizeof(plt0_entry_n32[0]); | |
2595 | else if (!this->is_plt_header_compressed()) | |
2596 | return 4 * sizeof(plt0_entry_o32) / sizeof(plt0_entry_o32[0]); | |
2597 | else if (this->target_->use_32bit_micromips_instructions()) | |
2598 | return (2 * sizeof(plt0_entry_micromips32_o32) | |
2599 | / sizeof(plt0_entry_micromips32_o32[0])); | |
2600 | else | |
2601 | return (2 * sizeof(plt0_entry_micromips_o32) | |
2602 | / sizeof(plt0_entry_micromips_o32[0])); | |
2603 | } | |
2604 | ||
2605 | // Return the PLT header entry. | |
2606 | const uint32_t* | |
2607 | get_plt_header_entry() const | |
2608 | { | |
2609 | if (this->target_->is_output_n64()) | |
2610 | return plt0_entry_n64; | |
2611 | else if (this->target_->is_output_n32()) | |
2612 | return plt0_entry_n32; | |
2613 | else if (!this->is_plt_header_compressed()) | |
2614 | return plt0_entry_o32; | |
2615 | else if (this->target_->use_32bit_micromips_instructions()) | |
2616 | return plt0_entry_micromips32_o32; | |
2617 | else | |
2618 | return plt0_entry_micromips_o32; | |
2619 | } | |
2620 | ||
2621 | // Return the size of the standard PLT entry. | |
2622 | unsigned int | |
2623 | standard_plt_entry_size() const | |
2624 | { return 4 * sizeof(plt_entry) / sizeof(plt_entry[0]); } | |
2625 | ||
2626 | // Return the size of the compressed PLT entry. | |
2627 | unsigned int | |
2628 | compressed_plt_entry_size() const | |
2629 | { | |
2630 | gold_assert(!this->target_->is_output_newabi()); | |
2631 | ||
2632 | if (!this->target_->is_output_micromips()) | |
2633 | return (2 * sizeof(plt_entry_mips16_o32) | |
2634 | / sizeof(plt_entry_mips16_o32[0])); | |
2635 | else if (this->target_->use_32bit_micromips_instructions()) | |
2636 | return (2 * sizeof(plt_entry_micromips32_o32) | |
2637 | / sizeof(plt_entry_micromips32_o32[0])); | |
2638 | else | |
2639 | return (2 * sizeof(plt_entry_micromips_o32) | |
2640 | / sizeof(plt_entry_micromips_o32[0])); | |
2641 | } | |
2642 | ||
2643 | // The reloc section. | |
2644 | Reloc_section* rel_; | |
2645 | // The .got.plt section. | |
2646 | Output_data_space* got_plt_; | |
2647 | // Symbols that have PLT entry. | |
2648 | std::vector<Mips_symbol<size>*> symbols_; | |
2649 | // The offset of the next standard PLT entry to create. | |
2650 | unsigned int plt_mips_offset_; | |
2651 | // The offset of the next compressed PLT entry to create. | |
2652 | unsigned int plt_comp_offset_; | |
2653 | // The size of the PLT header in bytes. | |
2654 | unsigned int plt_header_size_; | |
2655 | // The target. | |
2656 | Target_mips<size, big_endian>* target_; | |
2657 | }; | |
2658 | ||
2659 | // A class to handle the .MIPS.stubs data. | |
2660 | ||
2661 | template<int size, bool big_endian> | |
2662 | class Mips_output_data_mips_stubs : public Output_section_data | |
2663 | { | |
2664 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
2665 | ||
15eb1beb VR |
2666 | // Unordered set of .MIPS.stubs entries. |
2667 | typedef Unordered_set<Mips_symbol<size>*, Mips_symbol_hash<size> > | |
2668 | Mips_stubs_entry_set; | |
2669 | ||
9810d34d SS |
2670 | public: |
2671 | Mips_output_data_mips_stubs(Target_mips<size, big_endian>* target) | |
2672 | : Output_section_data(size == 32 ? 4 : 8), symbols_(), dynsym_count_(-1U), | |
2673 | stub_offsets_are_set_(false), target_(target) | |
2674 | { } | |
2675 | ||
2676 | // Create entry for a symbol. | |
2677 | void | |
2678 | make_entry(Mips_symbol<size>*); | |
2679 | ||
2680 | // Remove entry for a symbol. | |
2681 | void | |
2682 | remove_entry(Mips_symbol<size>* gsym); | |
2683 | ||
2684 | // Set stub offsets for symbols. This method expects that the number of | |
2685 | // entries in dynamic symbol table is set. | |
2686 | void | |
2687 | set_lazy_stub_offsets(); | |
2688 | ||
2689 | void | |
2690 | set_needs_dynsym_value(); | |
2691 | ||
2692 | // Set the number of entries in dynamic symbol table. | |
2693 | void | |
2694 | set_dynsym_count(unsigned int dynsym_count) | |
2695 | { this->dynsym_count_ = dynsym_count; } | |
2696 | ||
2697 | // Return maximum size of the stub, ie. the stub size if the dynamic symbol | |
2698 | // count is greater than 0x10000. If the dynamic symbol count is less than | |
2699 | // 0x10000, the stub will be 4 bytes smaller. | |
2700 | // There's no disadvantage from using microMIPS code here, so for the sake of | |
2701 | // pure-microMIPS binaries we prefer it whenever there's any microMIPS code in | |
2702 | // output produced at all. This has a benefit of stubs being shorter by | |
2703 | // 4 bytes each too, unless in the insn32 mode. | |
2704 | unsigned int | |
2705 | stub_max_size() const | |
2706 | { | |
2707 | if (!this->target_->is_output_micromips() | |
2708 | || this->target_->use_32bit_micromips_instructions()) | |
2709 | return 20; | |
2710 | else | |
2711 | return 16; | |
2712 | } | |
2713 | ||
2714 | // Return the size of the stub. This method expects that the final dynsym | |
2715 | // count is set. | |
2716 | unsigned int | |
2717 | stub_size() const | |
2718 | { | |
2719 | gold_assert(this->dynsym_count_ != -1U); | |
2720 | if (this->dynsym_count_ > 0x10000) | |
2721 | return this->stub_max_size(); | |
2722 | else | |
2723 | return this->stub_max_size() - 4; | |
2724 | } | |
2725 | ||
2726 | // Return output address of a stub. | |
2727 | Mips_address | |
2728 | stub_address(const Mips_symbol<size>* sym) const | |
2729 | { | |
2730 | gold_assert(sym->has_lazy_stub()); | |
2731 | return this->address() + sym->lazy_stub_offset(); | |
2732 | } | |
2733 | ||
2734 | protected: | |
2735 | void | |
2736 | do_adjust_output_section(Output_section* os) | |
2737 | { os->set_entsize(0); } | |
2738 | ||
2739 | // Write to a map file. | |
2740 | void | |
2741 | do_print_to_mapfile(Mapfile* mapfile) const | |
2742 | { mapfile->print_output_data(this, _(".MIPS.stubs")); } | |
2743 | ||
2744 | private: | |
2745 | static const uint32_t lazy_stub_normal_1[]; | |
2746 | static const uint32_t lazy_stub_normal_1_n64[]; | |
2747 | static const uint32_t lazy_stub_normal_2[]; | |
2748 | static const uint32_t lazy_stub_normal_2_n64[]; | |
2749 | static const uint32_t lazy_stub_big[]; | |
2750 | static const uint32_t lazy_stub_big_n64[]; | |
2751 | ||
2752 | static const uint32_t lazy_stub_micromips_normal_1[]; | |
2753 | static const uint32_t lazy_stub_micromips_normal_1_n64[]; | |
2754 | static const uint32_t lazy_stub_micromips_normal_2[]; | |
2755 | static const uint32_t lazy_stub_micromips_normal_2_n64[]; | |
2756 | static const uint32_t lazy_stub_micromips_big[]; | |
2757 | static const uint32_t lazy_stub_micromips_big_n64[]; | |
2758 | ||
2759 | static const uint32_t lazy_stub_micromips32_normal_1[]; | |
2760 | static const uint32_t lazy_stub_micromips32_normal_1_n64[]; | |
2761 | static const uint32_t lazy_stub_micromips32_normal_2[]; | |
2762 | static const uint32_t lazy_stub_micromips32_normal_2_n64[]; | |
2763 | static const uint32_t lazy_stub_micromips32_big[]; | |
2764 | static const uint32_t lazy_stub_micromips32_big_n64[]; | |
2765 | ||
2766 | // Set the final size. | |
2767 | void | |
2768 | set_final_data_size() | |
2769 | { this->set_data_size(this->symbols_.size() * this->stub_max_size()); } | |
2770 | ||
2771 | // Write out the .MIPS.stubs data. | |
2772 | void | |
2773 | do_write(Output_file*); | |
2774 | ||
2775 | // .MIPS.stubs symbols | |
15eb1beb | 2776 | Mips_stubs_entry_set symbols_; |
9810d34d SS |
2777 | // Number of entries in dynamic symbol table. |
2778 | unsigned int dynsym_count_; | |
2779 | // Whether the stub offsets are set. | |
2780 | bool stub_offsets_are_set_; | |
2781 | // The target. | |
2782 | Target_mips<size, big_endian>* target_; | |
2783 | }; | |
2784 | ||
2785 | // This class handles Mips .reginfo output section. | |
2786 | ||
2787 | template<int size, bool big_endian> | |
82e49872 | 2788 | class Mips_output_section_reginfo : public Output_section_data |
9810d34d SS |
2789 | { |
2790 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
2791 | ||
2792 | public: | |
82e49872 VR |
2793 | Mips_output_section_reginfo(Target_mips<size, big_endian>* target, |
2794 | Valtype gprmask, Valtype cprmask1, | |
2795 | Valtype cprmask2, Valtype cprmask3, | |
2796 | Valtype cprmask4) | |
2797 | : Output_section_data(24, 4, true), target_(target), | |
2798 | gprmask_(gprmask), cprmask1_(cprmask1), cprmask2_(cprmask2), | |
2799 | cprmask3_(cprmask3), cprmask4_(cprmask4) | |
9810d34d SS |
2800 | { } |
2801 | ||
9810d34d | 2802 | protected: |
82e49872 | 2803 | // Write to a map file. |
9810d34d | 2804 | void |
82e49872 VR |
2805 | do_print_to_mapfile(Mapfile* mapfile) const |
2806 | { mapfile->print_output_data(this, _(".reginfo")); } | |
9810d34d SS |
2807 | |
2808 | // Write out reginfo section. | |
2809 | void | |
2810 | do_write(Output_file* of); | |
2811 | ||
2812 | private: | |
2813 | Target_mips<size, big_endian>* target_; | |
2814 | ||
2815 | // gprmask of the output .reginfo section. | |
2816 | Valtype gprmask_; | |
2817 | // cprmask1 of the output .reginfo section. | |
2818 | Valtype cprmask1_; | |
2819 | // cprmask2 of the output .reginfo section. | |
2820 | Valtype cprmask2_; | |
2821 | // cprmask3 of the output .reginfo section. | |
2822 | Valtype cprmask3_; | |
2823 | // cprmask4 of the output .reginfo section. | |
2824 | Valtype cprmask4_; | |
2825 | }; | |
2826 | ||
1728969e VR |
2827 | // This class handles .MIPS.options output section. |
2828 | ||
2829 | template<int size, bool big_endian> | |
2830 | class Mips_output_section_options : public Output_section | |
2831 | { | |
2832 | public: | |
2833 | Mips_output_section_options(const char* name, elfcpp::Elf_Word type, | |
2834 | elfcpp::Elf_Xword flags, | |
2835 | Target_mips<size, big_endian>* target) | |
2836 | : Output_section(name, type, flags), target_(target) | |
2837 | { | |
2838 | // After the input sections are written, we only need to update | |
2839 | // ri_gp_value field of ODK_REGINFO entries. | |
2840 | this->set_after_input_sections(); | |
2841 | } | |
2842 | ||
2843 | protected: | |
2844 | // Write out option section. | |
2845 | void | |
2846 | do_write(Output_file* of); | |
2847 | ||
2848 | private: | |
2849 | Target_mips<size, big_endian>* target_; | |
2850 | }; | |
2851 | ||
b52717c0 VR |
2852 | // This class handles .MIPS.abiflags output section. |
2853 | ||
2854 | template<int size, bool big_endian> | |
2855 | class Mips_output_section_abiflags : public Output_section_data | |
2856 | { | |
2857 | public: | |
2858 | Mips_output_section_abiflags(const Mips_abiflags<big_endian>& abiflags) | |
2859 | : Output_section_data(24, 8, true), abiflags_(abiflags) | |
2860 | { } | |
2861 | ||
2862 | protected: | |
2863 | // Write to a map file. | |
2864 | void | |
2865 | do_print_to_mapfile(Mapfile* mapfile) const | |
2866 | { mapfile->print_output_data(this, _(".MIPS.abiflags")); } | |
2867 | ||
2868 | void | |
2869 | do_write(Output_file* of); | |
2870 | ||
2871 | private: | |
2872 | const Mips_abiflags<big_endian>& abiflags_; | |
2873 | }; | |
2874 | ||
9810d34d SS |
2875 | // The MIPS target has relocation types which default handling of relocatable |
2876 | // relocation cannot process. So we have to extend the default code. | |
2877 | ||
4d625b70 | 2878 | template<bool big_endian, typename Classify_reloc> |
9810d34d | 2879 | class Mips_scan_relocatable_relocs : |
4d625b70 | 2880 | public Default_scan_relocatable_relocs<Classify_reloc> |
9810d34d SS |
2881 | { |
2882 | public: | |
2883 | // Return the strategy to use for a local symbol which is a section | |
2884 | // symbol, given the relocation type. | |
2885 | inline Relocatable_relocs::Reloc_strategy | |
2886 | local_section_strategy(unsigned int r_type, Relobj* object) | |
2887 | { | |
4d625b70 | 2888 | if (Classify_reloc::sh_type == elfcpp::SHT_RELA) |
9810d34d SS |
2889 | return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA; |
2890 | else | |
2891 | { | |
2892 | switch (r_type) | |
2893 | { | |
2894 | case elfcpp::R_MIPS_26: | |
2895 | return Relocatable_relocs::RELOC_SPECIAL; | |
2896 | ||
2897 | default: | |
4d625b70 | 2898 | return Default_scan_relocatable_relocs<Classify_reloc>:: |
9810d34d SS |
2899 | local_section_strategy(r_type, object); |
2900 | } | |
2901 | } | |
2902 | } | |
2903 | }; | |
2904 | ||
2905 | // Mips_copy_relocs class. The only difference from the base class is the | |
2906 | // method emit_mips, which should be called instead of Copy_reloc_entry::emit. | |
2907 | // Mips cannot convert all relocation types to dynamic relocs. If a reloc | |
2908 | // cannot be made dynamic, a COPY reloc is emitted. | |
2909 | ||
2910 | template<int sh_type, int size, bool big_endian> | |
2911 | class Mips_copy_relocs : public Copy_relocs<sh_type, size, big_endian> | |
2912 | { | |
2913 | public: | |
2914 | Mips_copy_relocs() | |
2915 | : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_MIPS_COPY) | |
2916 | { } | |
2917 | ||
2918 | // Emit any saved relocations which turn out to be needed. This is | |
2919 | // called after all the relocs have been scanned. | |
2920 | void | |
2921 | emit_mips(Output_data_reloc<sh_type, true, size, big_endian>*, | |
2922 | Symbol_table*, Layout*, Target_mips<size, big_endian>*); | |
2923 | ||
2924 | private: | |
2925 | typedef typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry | |
2926 | Copy_reloc_entry; | |
2927 | ||
2928 | // Emit this reloc if appropriate. This is called after we have | |
2929 | // scanned all the relocations, so we know whether we emitted a | |
2930 | // COPY relocation for SYM_. | |
2931 | void | |
2932 | emit_entry(Copy_reloc_entry& entry, | |
2933 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section, | |
2934 | Symbol_table* symtab, Layout* layout, | |
2935 | Target_mips<size, big_endian>* target); | |
2936 | }; | |
2937 | ||
2938 | ||
2939 | // Return true if the symbol SYM should be considered to resolve local | |
2940 | // to the current module, and false otherwise. The logic is taken from | |
2941 | // GNU ld's method _bfd_elf_symbol_refs_local_p. | |
2942 | static bool | |
2943 | symbol_refs_local(const Symbol* sym, bool has_dynsym_entry, | |
2944 | bool local_protected) | |
2945 | { | |
2946 | // If it's a local sym, of course we resolve locally. | |
2947 | if (sym == NULL) | |
2948 | return true; | |
2949 | ||
2950 | // STV_HIDDEN or STV_INTERNAL ones must be local. | |
2951 | if (sym->visibility() == elfcpp::STV_HIDDEN | |
2952 | || sym->visibility() == elfcpp::STV_INTERNAL) | |
2953 | return true; | |
2954 | ||
2955 | // If we don't have a definition in a regular file, then we can't | |
2956 | // resolve locally. The sym is either undefined or dynamic. | |
453018bf | 2957 | if (sym->is_from_dynobj() || sym->is_undefined()) |
9810d34d SS |
2958 | return false; |
2959 | ||
2960 | // Forced local symbols resolve locally. | |
2961 | if (sym->is_forced_local()) | |
2962 | return true; | |
2963 | ||
2964 | // As do non-dynamic symbols. | |
2965 | if (!has_dynsym_entry) | |
2966 | return true; | |
2967 | ||
2968 | // At this point, we know the symbol is defined and dynamic. In an | |
2969 | // executable it must resolve locally, likewise when building symbolic | |
2970 | // shared libraries. | |
2971 | if (parameters->options().output_is_executable() | |
2972 | || parameters->options().Bsymbolic()) | |
2973 | return true; | |
2974 | ||
2975 | // Now deal with defined dynamic symbols in shared libraries. Ones | |
2976 | // with default visibility might not resolve locally. | |
2977 | if (sym->visibility() == elfcpp::STV_DEFAULT) | |
2978 | return false; | |
2979 | ||
2980 | // STV_PROTECTED non-function symbols are local. | |
2981 | if (sym->type() != elfcpp::STT_FUNC) | |
2982 | return true; | |
2983 | ||
2984 | // Function pointer equality tests may require that STV_PROTECTED | |
2985 | // symbols be treated as dynamic symbols. If the address of a | |
2986 | // function not defined in an executable is set to that function's | |
2987 | // plt entry in the executable, then the address of the function in | |
2988 | // a shared library must also be the plt entry in the executable. | |
2989 | return local_protected; | |
2990 | } | |
2991 | ||
2992 | // Return TRUE if references to this symbol always reference the symbol in this | |
2993 | // object. | |
2994 | static bool | |
2995 | symbol_references_local(const Symbol* sym, bool has_dynsym_entry) | |
2996 | { | |
2997 | return symbol_refs_local(sym, has_dynsym_entry, false); | |
2998 | } | |
2999 | ||
3000 | // Return TRUE if calls to this symbol always call the version in this object. | |
3001 | static bool | |
3002 | symbol_calls_local(const Symbol* sym, bool has_dynsym_entry) | |
3003 | { | |
3004 | return symbol_refs_local(sym, has_dynsym_entry, true); | |
3005 | } | |
3006 | ||
3007 | // Compare GOT offsets of two symbols. | |
3008 | ||
3009 | template<int size, bool big_endian> | |
3010 | static bool | |
3011 | got_offset_compare(Symbol* sym1, Symbol* sym2) | |
3012 | { | |
3013 | Mips_symbol<size>* mips_sym1 = Mips_symbol<size>::as_mips_sym(sym1); | |
3014 | Mips_symbol<size>* mips_sym2 = Mips_symbol<size>::as_mips_sym(sym2); | |
3015 | unsigned int area1 = mips_sym1->global_got_area(); | |
3016 | unsigned int area2 = mips_sym2->global_got_area(); | |
3017 | gold_assert(area1 != GGA_NONE && area1 != GGA_NONE); | |
3018 | ||
3019 | // GGA_NORMAL entries always come before GGA_RELOC_ONLY. | |
3020 | if (area1 != area2) | |
3021 | return area1 < area2; | |
3022 | ||
3023 | return mips_sym1->global_gotoffset() < mips_sym2->global_gotoffset(); | |
3024 | } | |
3025 | ||
3026 | // This method divides dynamic symbols into symbols that have GOT entry, and | |
3027 | // symbols that don't have GOT entry. It also sorts symbols with the GOT entry. | |
3028 | // Mips ABI requires that symbols with the GOT entry must be at the end of | |
3029 | // dynamic symbol table, and the order in dynamic symbol table must match the | |
3030 | // order in GOT. | |
3031 | ||
3032 | template<int size, bool big_endian> | |
3033 | static void | |
3034 | reorder_dyn_symbols(std::vector<Symbol*>* dyn_symbols, | |
3035 | std::vector<Symbol*>* non_got_symbols, | |
3036 | std::vector<Symbol*>* got_symbols) | |
3037 | { | |
3038 | for (std::vector<Symbol*>::iterator p = dyn_symbols->begin(); | |
3039 | p != dyn_symbols->end(); | |
3040 | ++p) | |
3041 | { | |
3042 | Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(*p); | |
3043 | if (mips_sym->global_got_area() == GGA_NORMAL | |
3044 | || mips_sym->global_got_area() == GGA_RELOC_ONLY) | |
3045 | got_symbols->push_back(mips_sym); | |
3046 | else | |
3047 | non_got_symbols->push_back(mips_sym); | |
3048 | } | |
3049 | ||
3050 | std::sort(got_symbols->begin(), got_symbols->end(), | |
3051 | got_offset_compare<size, big_endian>); | |
3052 | } | |
3053 | ||
3054 | // Functor class for processing the global symbol table. | |
3055 | ||
3056 | template<int size, bool big_endian> | |
3057 | class Symbol_visitor_check_symbols | |
3058 | { | |
3059 | public: | |
3060 | Symbol_visitor_check_symbols(Target_mips<size, big_endian>* target, | |
3061 | Layout* layout, Symbol_table* symtab) | |
3062 | : target_(target), layout_(layout), symtab_(symtab) | |
3063 | { } | |
3064 | ||
3065 | void | |
3066 | operator()(Sized_symbol<size>* sym) | |
3067 | { | |
3068 | Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(sym); | |
3069 | if (local_pic_function<size, big_endian>(mips_sym)) | |
3070 | { | |
3071 | // SYM is a function that might need $25 to be valid on entry. | |
3072 | // If we're creating a non-PIC relocatable object, mark SYM as | |
3073 | // being PIC. If we're creating a non-relocatable object with | |
3074 | // non-PIC branches and jumps to SYM, make sure that SYM has an la25 | |
3075 | // stub. | |
3076 | if (parameters->options().relocatable()) | |
3077 | { | |
3078 | if (!parameters->options().output_is_position_independent()) | |
3079 | mips_sym->set_pic(); | |
3080 | } | |
3081 | else if (mips_sym->has_nonpic_branches()) | |
3082 | { | |
3083 | this->target_->la25_stub_section(layout_) | |
3084 | ->create_la25_stub(this->symtab_, this->target_, mips_sym); | |
3085 | } | |
3086 | } | |
3087 | } | |
3088 | ||
3089 | private: | |
3090 | Target_mips<size, big_endian>* target_; | |
3091 | Layout* layout_; | |
3092 | Symbol_table* symtab_; | |
3093 | }; | |
3094 | ||
4d625b70 CC |
3095 | // Relocation types, parameterized by SHT_REL vs. SHT_RELA, size, |
3096 | // and endianness. The relocation format for MIPS-64 is non-standard. | |
3097 | ||
3098 | template<int sh_type, int size, bool big_endian> | |
3099 | struct Mips_reloc_types; | |
3100 | ||
3101 | template<bool big_endian> | |
3102 | struct Mips_reloc_types<elfcpp::SHT_REL, 32, big_endian> | |
3103 | { | |
3104 | typedef typename elfcpp::Rel<32, big_endian> Reloc; | |
3105 | typedef typename elfcpp::Rel_write<32, big_endian> Reloc_write; | |
3106 | ||
47a9f4fc | 3107 | static typename elfcpp::Elf_types<32>::Elf_Swxword |
4d625b70 CC |
3108 | get_r_addend(const Reloc*) |
3109 | { return 0; } | |
3110 | ||
3111 | static inline void | |
3112 | set_reloc_addend(Reloc_write*, | |
3113 | typename elfcpp::Elf_types<32>::Elf_Swxword) | |
3114 | { gold_unreachable(); } | |
3115 | }; | |
3116 | ||
3117 | template<bool big_endian> | |
3118 | struct Mips_reloc_types<elfcpp::SHT_RELA, 32, big_endian> | |
3119 | { | |
3120 | typedef typename elfcpp::Rela<32, big_endian> Reloc; | |
3121 | typedef typename elfcpp::Rela_write<32, big_endian> Reloc_write; | |
3122 | ||
47a9f4fc | 3123 | static typename elfcpp::Elf_types<32>::Elf_Swxword |
4d625b70 CC |
3124 | get_r_addend(const Reloc* reloc) |
3125 | { return reloc->get_r_addend(); } | |
3126 | ||
3127 | static inline void | |
3128 | set_reloc_addend(Reloc_write* p, | |
3129 | typename elfcpp::Elf_types<32>::Elf_Swxword val) | |
3130 | { p->put_r_addend(val); } | |
3131 | }; | |
3132 | ||
3133 | template<bool big_endian> | |
3134 | struct Mips_reloc_types<elfcpp::SHT_REL, 64, big_endian> | |
3135 | { | |
3136 | typedef typename elfcpp::Mips64_rel<big_endian> Reloc; | |
3137 | typedef typename elfcpp::Mips64_rel_write<big_endian> Reloc_write; | |
3138 | ||
47a9f4fc | 3139 | static typename elfcpp::Elf_types<64>::Elf_Swxword |
4d625b70 CC |
3140 | get_r_addend(const Reloc*) |
3141 | { return 0; } | |
3142 | ||
3143 | static inline void | |
3144 | set_reloc_addend(Reloc_write*, | |
3145 | typename elfcpp::Elf_types<64>::Elf_Swxword) | |
3146 | { gold_unreachable(); } | |
3147 | }; | |
3148 | ||
3149 | template<bool big_endian> | |
3150 | struct Mips_reloc_types<elfcpp::SHT_RELA, 64, big_endian> | |
3151 | { | |
3152 | typedef typename elfcpp::Mips64_rela<big_endian> Reloc; | |
3153 | typedef typename elfcpp::Mips64_rela_write<big_endian> Reloc_write; | |
3154 | ||
47a9f4fc | 3155 | static typename elfcpp::Elf_types<64>::Elf_Swxword |
4d625b70 CC |
3156 | get_r_addend(const Reloc* reloc) |
3157 | { return reloc->get_r_addend(); } | |
3158 | ||
3159 | static inline void | |
3160 | set_reloc_addend(Reloc_write* p, | |
3161 | typename elfcpp::Elf_types<64>::Elf_Swxword val) | |
3162 | { p->put_r_addend(val); } | |
3163 | }; | |
3164 | ||
3165 | // Forward declaration. | |
3166 | static unsigned int | |
3167 | mips_get_size_for_reloc(unsigned int, Relobj*); | |
3168 | ||
3169 | // A class for inquiring about properties of a relocation, | |
3170 | // used while scanning relocs during a relocatable link and | |
3171 | // garbage collection. | |
3172 | ||
3173 | template<int sh_type_, int size, bool big_endian> | |
3174 | class Mips_classify_reloc; | |
3175 | ||
3176 | template<int sh_type_, bool big_endian> | |
3177 | class Mips_classify_reloc<sh_type_, 32, big_endian> : | |
3178 | public gold::Default_classify_reloc<sh_type_, 32, big_endian> | |
3179 | { | |
3180 | public: | |
3181 | typedef typename Mips_reloc_types<sh_type_, 32, big_endian>::Reloc | |
3182 | Reltype; | |
3183 | typedef typename Mips_reloc_types<sh_type_, 32, big_endian>::Reloc_write | |
3184 | Reltype_write; | |
3185 | ||
3186 | // Return the symbol referred to by the relocation. | |
3187 | static inline unsigned int | |
3188 | get_r_sym(const Reltype* reloc) | |
3189 | { return elfcpp::elf_r_sym<32>(reloc->get_r_info()); } | |
3190 | ||
3191 | // Return the type of the relocation. | |
3192 | static inline unsigned int | |
3193 | get_r_type(const Reltype* reloc) | |
3194 | { return elfcpp::elf_r_type<32>(reloc->get_r_info()); } | |
3195 | ||
47a9f4fc VR |
3196 | static inline unsigned int |
3197 | get_r_type2(const Reltype*) | |
3198 | { return 0; } | |
3199 | ||
3200 | static inline unsigned int | |
3201 | get_r_type3(const Reltype*) | |
3202 | { return 0; } | |
3203 | ||
3204 | static inline unsigned int | |
3205 | get_r_ssym(const Reltype*) | |
3206 | { return 0; } | |
3207 | ||
4d625b70 CC |
3208 | // Return the explicit addend of the relocation (return 0 for SHT_REL). |
3209 | static inline unsigned int | |
3210 | get_r_addend(const Reltype* reloc) | |
8a8880cb CC |
3211 | { |
3212 | if (sh_type_ == elfcpp::SHT_REL) | |
3213 | return 0; | |
3214 | return Mips_reloc_types<sh_type_, 32, big_endian>::get_r_addend(reloc); | |
3215 | } | |
4d625b70 CC |
3216 | |
3217 | // Write the r_info field to a new reloc, using the r_info field from | |
3218 | // the original reloc, replacing the r_sym field with R_SYM. | |
3219 | static inline void | |
3220 | put_r_info(Reltype_write* new_reloc, Reltype* reloc, unsigned int r_sym) | |
3221 | { | |
3222 | unsigned int r_type = elfcpp::elf_r_type<32>(reloc->get_r_info()); | |
c2fa9ced | 3223 | new_reloc->put_r_info(elfcpp::elf_r_info<32>(r_sym, r_type)); |
4d625b70 CC |
3224 | } |
3225 | ||
3226 | // Write the r_addend field to a new reloc. | |
3227 | static inline void | |
3228 | put_r_addend(Reltype_write* to, | |
3229 | typename elfcpp::Elf_types<32>::Elf_Swxword addend) | |
3230 | { Mips_reloc_types<sh_type_, 32, big_endian>::set_reloc_addend(to, addend); } | |
3231 | ||
3232 | // Return the size of the addend of the relocation (only used for SHT_REL). | |
3233 | static unsigned int | |
3234 | get_size_for_reloc(unsigned int r_type, Relobj* obj) | |
3235 | { return mips_get_size_for_reloc(r_type, obj); } | |
3236 | }; | |
3237 | ||
3238 | template<int sh_type_, bool big_endian> | |
3239 | class Mips_classify_reloc<sh_type_, 64, big_endian> : | |
3240 | public gold::Default_classify_reloc<sh_type_, 64, big_endian> | |
3241 | { | |
3242 | public: | |
3243 | typedef typename Mips_reloc_types<sh_type_, 64, big_endian>::Reloc | |
3244 | Reltype; | |
3245 | typedef typename Mips_reloc_types<sh_type_, 64, big_endian>::Reloc_write | |
3246 | Reltype_write; | |
3247 | ||
3248 | // Return the symbol referred to by the relocation. | |
3249 | static inline unsigned int | |
3250 | get_r_sym(const Reltype* reloc) | |
3251 | { return reloc->get_r_sym(); } | |
3252 | ||
47a9f4fc | 3253 | // Return the r_type of the relocation. |
4d625b70 CC |
3254 | static inline unsigned int |
3255 | get_r_type(const Reltype* reloc) | |
3256 | { return reloc->get_r_type(); } | |
3257 | ||
47a9f4fc VR |
3258 | // Return the r_type2 of the relocation. |
3259 | static inline unsigned int | |
3260 | get_r_type2(const Reltype* reloc) | |
3261 | { return reloc->get_r_type2(); } | |
3262 | ||
3263 | // Return the r_type3 of the relocation. | |
3264 | static inline unsigned int | |
3265 | get_r_type3(const Reltype* reloc) | |
3266 | { return reloc->get_r_type3(); } | |
3267 | ||
3268 | // Return the special symbol of the relocation. | |
3269 | static inline unsigned int | |
3270 | get_r_ssym(const Reltype* reloc) | |
3271 | { return reloc->get_r_ssym(); } | |
3272 | ||
4d625b70 CC |
3273 | // Return the explicit addend of the relocation (return 0 for SHT_REL). |
3274 | static inline typename elfcpp::Elf_types<64>::Elf_Swxword | |
3275 | get_r_addend(const Reltype* reloc) | |
8a8880cb CC |
3276 | { |
3277 | if (sh_type_ == elfcpp::SHT_REL) | |
3278 | return 0; | |
3279 | return Mips_reloc_types<sh_type_, 64, big_endian>::get_r_addend(reloc); | |
3280 | } | |
4d625b70 CC |
3281 | |
3282 | // Write the r_info field to a new reloc, using the r_info field from | |
3283 | // the original reloc, replacing the r_sym field with R_SYM. | |
3284 | static inline void | |
3285 | put_r_info(Reltype_write* new_reloc, Reltype* reloc, unsigned int r_sym) | |
3286 | { | |
3287 | new_reloc->put_r_sym(r_sym); | |
3288 | new_reloc->put_r_ssym(reloc->get_r_ssym()); | |
3289 | new_reloc->put_r_type3(reloc->get_r_type3()); | |
3290 | new_reloc->put_r_type2(reloc->get_r_type2()); | |
3291 | new_reloc->put_r_type(reloc->get_r_type()); | |
3292 | } | |
3293 | ||
3294 | // Write the r_addend field to a new reloc. | |
3295 | static inline void | |
3296 | put_r_addend(Reltype_write* to, | |
3297 | typename elfcpp::Elf_types<64>::Elf_Swxword addend) | |
3298 | { Mips_reloc_types<sh_type_, 64, big_endian>::set_reloc_addend(to, addend); } | |
3299 | ||
3300 | // Return the size of the addend of the relocation (only used for SHT_REL). | |
3301 | static unsigned int | |
3302 | get_size_for_reloc(unsigned int r_type, Relobj* obj) | |
3303 | { return mips_get_size_for_reloc(r_type, obj); } | |
3304 | }; | |
3305 | ||
9810d34d SS |
3306 | template<int size, bool big_endian> |
3307 | class Target_mips : public Sized_target<size, big_endian> | |
3308 | { | |
3309 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
47a9f4fc | 3310 | typedef Mips_output_data_reloc<elfcpp::SHT_REL, true, size, big_endian> |
9810d34d | 3311 | Reloc_section; |
9810d34d SS |
3312 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32; |
3313 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
4d625b70 CC |
3314 | typedef typename Mips_reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc |
3315 | Reltype; | |
3316 | typedef typename Mips_reloc_types<elfcpp::SHT_RELA, size, big_endian>::Reloc | |
3317 | Relatype; | |
9810d34d SS |
3318 | |
3319 | public: | |
3320 | Target_mips(const Target::Target_info* info = &mips_info) | |
3321 | : Sized_target<size, big_endian>(info), got_(NULL), gp_(NULL), plt_(NULL), | |
a8ecc9fe VR |
3322 | got_plt_(NULL), rel_dyn_(NULL), rld_map_(NULL), copy_relocs_(), |
3323 | dyn_relocs_(), la25_stub_(NULL), mips_mach_extensions_(), | |
3324 | mips_stubs_(NULL), attributes_section_data_(NULL), abiflags_(NULL), | |
3325 | mach_(0), layout_(NULL), got16_addends_(), has_abiflags_section_(false), | |
01b84e25 | 3326 | entry_symbol_is_compressed_(false), insn32_(false) |
9810d34d SS |
3327 | { |
3328 | this->add_machine_extensions(); | |
3329 | } | |
3330 | ||
3331 | // The offset of $gp from the beginning of the .got section. | |
3332 | static const unsigned int MIPS_GP_OFFSET = 0x7ff0; | |
3333 | ||
3334 | // The maximum size of the GOT for it to be addressable using 16-bit | |
3335 | // offsets from $gp. | |
3336 | static const unsigned int MIPS_GOT_MAX_SIZE = MIPS_GP_OFFSET + 0x7fff; | |
3337 | ||
3338 | // Make a new symbol table entry for the Mips target. | |
3339 | Sized_symbol<size>* | |
dc1c8a16 | 3340 | make_symbol(const char*, elfcpp::STT, Object*, unsigned int, uint64_t) |
9810d34d SS |
3341 | { return new Mips_symbol<size>(); } |
3342 | ||
3343 | // Process the relocations to determine unreferenced sections for | |
3344 | // garbage collection. | |
3345 | void | |
3346 | gc_process_relocs(Symbol_table* symtab, | |
3347 | Layout* layout, | |
3348 | Sized_relobj_file<size, big_endian>* object, | |
3349 | unsigned int data_shndx, | |
3350 | unsigned int sh_type, | |
3351 | const unsigned char* prelocs, | |
3352 | size_t reloc_count, | |
3353 | Output_section* output_section, | |
3354 | bool needs_special_offset_handling, | |
3355 | size_t local_symbol_count, | |
3356 | const unsigned char* plocal_symbols); | |
3357 | ||
3358 | // Scan the relocations to look for symbol adjustments. | |
3359 | void | |
3360 | scan_relocs(Symbol_table* symtab, | |
3361 | Layout* layout, | |
3362 | Sized_relobj_file<size, big_endian>* object, | |
3363 | unsigned int data_shndx, | |
3364 | unsigned int sh_type, | |
3365 | const unsigned char* prelocs, | |
3366 | size_t reloc_count, | |
3367 | Output_section* output_section, | |
3368 | bool needs_special_offset_handling, | |
3369 | size_t local_symbol_count, | |
3370 | const unsigned char* plocal_symbols); | |
3371 | ||
3372 | // Finalize the sections. | |
3373 | void | |
3374 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); | |
3375 | ||
3376 | // Relocate a section. | |
3377 | void | |
3378 | relocate_section(const Relocate_info<size, big_endian>*, | |
3379 | unsigned int sh_type, | |
3380 | const unsigned char* prelocs, | |
3381 | size_t reloc_count, | |
3382 | Output_section* output_section, | |
3383 | bool needs_special_offset_handling, | |
3384 | unsigned char* view, | |
3385 | Mips_address view_address, | |
3386 | section_size_type view_size, | |
3387 | const Reloc_symbol_changes*); | |
3388 | ||
3389 | // Scan the relocs during a relocatable link. | |
3390 | void | |
3391 | scan_relocatable_relocs(Symbol_table* symtab, | |
3392 | Layout* layout, | |
3393 | Sized_relobj_file<size, big_endian>* object, | |
3394 | unsigned int data_shndx, | |
3395 | unsigned int sh_type, | |
3396 | const unsigned char* prelocs, | |
3397 | size_t reloc_count, | |
3398 | Output_section* output_section, | |
3399 | bool needs_special_offset_handling, | |
3400 | size_t local_symbol_count, | |
3401 | const unsigned char* plocal_symbols, | |
3402 | Relocatable_relocs*); | |
3403 | ||
4d625b70 CC |
3404 | // Scan the relocs for --emit-relocs. |
3405 | void | |
3406 | emit_relocs_scan(Symbol_table* symtab, | |
3407 | Layout* layout, | |
3408 | Sized_relobj_file<size, big_endian>* object, | |
3409 | unsigned int data_shndx, | |
3410 | unsigned int sh_type, | |
3411 | const unsigned char* prelocs, | |
3412 | size_t reloc_count, | |
3413 | Output_section* output_section, | |
3414 | bool needs_special_offset_handling, | |
3415 | size_t local_symbol_count, | |
3416 | const unsigned char* plocal_syms, | |
3417 | Relocatable_relocs* rr); | |
3418 | ||
9810d34d SS |
3419 | // Emit relocations for a section. |
3420 | void | |
3421 | relocate_relocs(const Relocate_info<size, big_endian>*, | |
3422 | unsigned int sh_type, | |
3423 | const unsigned char* prelocs, | |
3424 | size_t reloc_count, | |
3425 | Output_section* output_section, | |
3426 | typename elfcpp::Elf_types<size>::Elf_Off | |
3427 | offset_in_output_section, | |
9810d34d SS |
3428 | unsigned char* view, |
3429 | Mips_address view_address, | |
3430 | section_size_type view_size, | |
3431 | unsigned char* reloc_view, | |
3432 | section_size_type reloc_view_size); | |
3433 | ||
3434 | // Perform target-specific processing in a relocatable link. This is | |
3435 | // only used if we use the relocation strategy RELOC_SPECIAL. | |
3436 | void | |
3437 | relocate_special_relocatable(const Relocate_info<size, big_endian>* relinfo, | |
3438 | unsigned int sh_type, | |
3439 | const unsigned char* preloc_in, | |
3440 | size_t relnum, | |
3441 | Output_section* output_section, | |
3442 | typename elfcpp::Elf_types<size>::Elf_Off | |
3443 | offset_in_output_section, | |
3444 | unsigned char* view, | |
3445 | Mips_address view_address, | |
3446 | section_size_type view_size, | |
3447 | unsigned char* preloc_out); | |
3448 | ||
3449 | // Return whether SYM is defined by the ABI. | |
3450 | bool | |
3451 | do_is_defined_by_abi(const Symbol* sym) const | |
3452 | { | |
3453 | return ((strcmp(sym->name(), "__gnu_local_gp") == 0) | |
3454 | || (strcmp(sym->name(), "_gp_disp") == 0) | |
3455 | || (strcmp(sym->name(), "___tls_get_addr") == 0)); | |
3456 | } | |
3457 | ||
3458 | // Return the number of entries in the GOT. | |
3459 | unsigned int | |
3460 | got_entry_count() const | |
3461 | { | |
3462 | if (!this->has_got_section()) | |
3463 | return 0; | |
3464 | return this->got_size() / (size/8); | |
3465 | } | |
3466 | ||
3467 | // Return the number of entries in the PLT. | |
3468 | unsigned int | |
3469 | plt_entry_count() const | |
3470 | { | |
3471 | if (this->plt_ == NULL) | |
3472 | return 0; | |
3473 | return this->plt_->entry_count(); | |
3474 | } | |
3475 | ||
3476 | // Return the offset of the first non-reserved PLT entry. | |
3477 | unsigned int | |
3478 | first_plt_entry_offset() const | |
3479 | { return this->plt_->first_plt_entry_offset(); } | |
3480 | ||
3481 | // Return the size of each PLT entry. | |
3482 | unsigned int | |
3483 | plt_entry_size() const | |
3484 | { return this->plt_->plt_entry_size(); } | |
3485 | ||
3486 | // Get the GOT section, creating it if necessary. | |
3487 | Mips_output_data_got<size, big_endian>* | |
3488 | got_section(Symbol_table*, Layout*); | |
3489 | ||
3490 | // Get the GOT section. | |
3491 | Mips_output_data_got<size, big_endian>* | |
3492 | got_section() const | |
3493 | { | |
3494 | gold_assert(this->got_ != NULL); | |
3495 | return this->got_; | |
3496 | } | |
3497 | ||
3498 | // Get the .MIPS.stubs section, creating it if necessary. | |
3499 | Mips_output_data_mips_stubs<size, big_endian>* | |
3500 | mips_stubs_section(Layout* layout); | |
3501 | ||
3502 | // Get the .MIPS.stubs section. | |
3503 | Mips_output_data_mips_stubs<size, big_endian>* | |
3504 | mips_stubs_section() const | |
3505 | { | |
3506 | gold_assert(this->mips_stubs_ != NULL); | |
3507 | return this->mips_stubs_; | |
3508 | } | |
3509 | ||
3510 | // Get the LA25 stub section, creating it if necessary. | |
3511 | Mips_output_data_la25_stub<size, big_endian>* | |
3512 | la25_stub_section(Layout*); | |
3513 | ||
3514 | // Get the LA25 stub section. | |
3515 | Mips_output_data_la25_stub<size, big_endian>* | |
3516 | la25_stub_section() | |
3517 | { | |
3518 | gold_assert(this->la25_stub_ != NULL); | |
3519 | return this->la25_stub_; | |
3520 | } | |
3521 | ||
3522 | // Get gp value. It has the value of .got + 0x7FF0. | |
3523 | Mips_address | |
3524 | gp_value() const | |
3525 | { | |
3526 | if (this->gp_ != NULL) | |
3527 | return this->gp_->value(); | |
3528 | return 0; | |
3529 | } | |
3530 | ||
3531 | // Get gp value. It has the value of .got + 0x7FF0. Adjust it for | |
3532 | // multi-GOT links so that OBJECT's GOT + 0x7FF0 is returned. | |
3533 | Mips_address | |
3534 | adjusted_gp_value(const Mips_relobj<size, big_endian>* object) | |
3535 | { | |
3536 | if (this->gp_ == NULL) | |
3537 | return 0; | |
3538 | ||
3539 | bool multi_got = false; | |
3540 | if (this->has_got_section()) | |
3541 | multi_got = this->got_section()->multi_got(); | |
3542 | if (!multi_got) | |
3543 | return this->gp_->value(); | |
3544 | else | |
3545 | return this->gp_->value() + this->got_section()->get_got_offset(object); | |
3546 | } | |
3547 | ||
3548 | // Get the dynamic reloc section, creating it if necessary. | |
3549 | Reloc_section* | |
3550 | rel_dyn_section(Layout*); | |
3551 | ||
3552 | bool | |
3553 | do_has_custom_set_dynsym_indexes() const | |
3554 | { return true; } | |
3555 | ||
b52717c0 VR |
3556 | // Don't emit input .reginfo/.MIPS.abiflags sections to |
3557 | // output .reginfo/.MIPS.abiflags. | |
9810d34d SS |
3558 | bool |
3559 | do_should_include_section(elfcpp::Elf_Word sh_type) const | |
b52717c0 VR |
3560 | { |
3561 | return ((sh_type != elfcpp::SHT_MIPS_REGINFO) | |
3562 | && (sh_type != elfcpp::SHT_MIPS_ABIFLAGS)); | |
3563 | } | |
9810d34d SS |
3564 | |
3565 | // Set the dynamic symbol indexes. INDEX is the index of the first | |
3566 | // global dynamic symbol. Pointers to the symbols are stored into the | |
3567 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
3568 | // updated dynamic symbol index. | |
3569 | unsigned int | |
3570 | do_set_dynsym_indexes(std::vector<Symbol*>* dyn_symbols, unsigned int index, | |
3571 | std::vector<Symbol*>* syms, Stringpool* dynpool, | |
3572 | Versions* versions, Symbol_table* symtab) const; | |
3573 | ||
3574 | // Remove .MIPS.stubs entry for a symbol. | |
3575 | void | |
3576 | remove_lazy_stub_entry(Mips_symbol<size>* sym) | |
3577 | { | |
3578 | if (this->mips_stubs_ != NULL) | |
3579 | this->mips_stubs_->remove_entry(sym); | |
3580 | } | |
3581 | ||
3582 | // The value to write into got[1] for SVR4 targets, to identify it is | |
3583 | // a GNU object. The dynamic linker can then use got[1] to store the | |
3584 | // module pointer. | |
3585 | uint64_t | |
3586 | mips_elf_gnu_got1_mask() | |
3587 | { | |
3588 | if (this->is_output_n64()) | |
3589 | return (uint64_t)1 << 63; | |
3590 | else | |
3591 | return 1 << 31; | |
3592 | } | |
3593 | ||
3594 | // Whether the output has microMIPS code. This is valid only after | |
b52717c0 | 3595 | // merge_obj_e_flags() is called. |
9810d34d SS |
3596 | bool |
3597 | is_output_micromips() const | |
3598 | { | |
3599 | gold_assert(this->are_processor_specific_flags_set()); | |
3600 | return elfcpp::is_micromips(this->processor_specific_flags()); | |
3601 | } | |
3602 | ||
3603 | // Whether the output uses N32 ABI. This is valid only after | |
b52717c0 | 3604 | // merge_obj_e_flags() is called. |
9810d34d SS |
3605 | bool |
3606 | is_output_n32() const | |
3607 | { | |
3608 | gold_assert(this->are_processor_specific_flags_set()); | |
3609 | return elfcpp::abi_n32(this->processor_specific_flags()); | |
3610 | } | |
3611 | ||
f5b11759 VR |
3612 | // Whether the output uses R6 ISA. This is valid only after |
3613 | // merge_obj_e_flags() is called. | |
3614 | bool | |
3615 | is_output_r6() const | |
3616 | { | |
3617 | gold_assert(this->are_processor_specific_flags_set()); | |
3618 | return elfcpp::r6_isa(this->processor_specific_flags()); | |
3619 | } | |
3620 | ||
01b84e25 | 3621 | // Whether the output uses N64 ABI. |
9810d34d SS |
3622 | bool |
3623 | is_output_n64() const | |
01b84e25 | 3624 | { return size == 64; } |
9810d34d SS |
3625 | |
3626 | // Whether the output uses NEWABI. This is valid only after | |
b52717c0 | 3627 | // merge_obj_e_flags() is called. |
9810d34d SS |
3628 | bool |
3629 | is_output_newabi() const | |
3630 | { return this->is_output_n32() || this->is_output_n64(); } | |
3631 | ||
3632 | // Whether we can only use 32-bit microMIPS instructions. | |
3633 | bool | |
3634 | use_32bit_micromips_instructions() const | |
3635 | { return this->insn32_; } | |
3636 | ||
4d625b70 CC |
3637 | // Return the r_sym field from a relocation. |
3638 | unsigned int | |
3639 | get_r_sym(const unsigned char* preloc) const | |
3640 | { | |
3641 | // Since REL and RELA relocs share the same structure through | |
3642 | // the r_info field, we can just use REL here. | |
3643 | Reltype rel(preloc); | |
3644 | return Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: | |
3645 | get_r_sym(&rel); | |
3646 | } | |
3647 | ||
9810d34d SS |
3648 | protected: |
3649 | // Return the value to use for a dynamic symbol which requires special | |
3650 | // treatment. This is how we support equality comparisons of function | |
3651 | // pointers across shared library boundaries, as described in the | |
3652 | // processor specific ABI supplement. | |
3653 | uint64_t | |
3654 | do_dynsym_value(const Symbol* gsym) const; | |
3655 | ||
3656 | // Make an ELF object. | |
3657 | Object* | |
3658 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
3659 | const elfcpp::Ehdr<size, big_endian>& ehdr); | |
3660 | ||
3661 | Object* | |
3662 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
3663 | const elfcpp::Ehdr<size, !big_endian>&) | |
3664 | { gold_unreachable(); } | |
3665 | ||
1728969e VR |
3666 | // Make an output section. |
3667 | Output_section* | |
3668 | do_make_output_section(const char* name, elfcpp::Elf_Word type, | |
3669 | elfcpp::Elf_Xword flags) | |
3670 | { | |
3671 | if (type == elfcpp::SHT_MIPS_OPTIONS) | |
3672 | return new Mips_output_section_options<size, big_endian>(name, type, | |
3673 | flags, this); | |
3674 | else | |
3675 | return new Output_section(name, type, flags); | |
3676 | } | |
3677 | ||
9810d34d SS |
3678 | // Adjust ELF file header. |
3679 | void | |
3680 | do_adjust_elf_header(unsigned char* view, int len); | |
3681 | ||
3682 | // Get the custom dynamic tag value. | |
3683 | unsigned int | |
3684 | do_dynamic_tag_custom_value(elfcpp::DT) const; | |
3685 | ||
3686 | // Adjust the value written to the dynamic symbol table. | |
3687 | virtual void | |
3688 | do_adjust_dyn_symbol(const Symbol* sym, unsigned char* view) const | |
3689 | { | |
3690 | elfcpp::Sym<size, big_endian> isym(view); | |
3691 | elfcpp::Sym_write<size, big_endian> osym(view); | |
3692 | const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(sym); | |
3693 | ||
3694 | // Keep dynamic compressed symbols odd. This allows the dynamic linker | |
3695 | // to treat compressed symbols like any other. | |
3696 | Mips_address value = isym.get_st_value(); | |
3697 | if (mips_sym->is_mips16() && value != 0) | |
3698 | { | |
3699 | if (!mips_sym->has_mips16_fn_stub()) | |
3700 | value |= 1; | |
3701 | else | |
3702 | { | |
3703 | // If we have a MIPS16 function with a stub, the dynamic symbol | |
3704 | // must refer to the stub, since only the stub uses the standard | |
3705 | // calling conventions. Stub contains MIPS32 code, so don't add +1 | |
3706 | // in this case. | |
3707 | ||
3708 | // There is a code which does this in the method | |
3709 | // Target_mips::do_dynsym_value, but that code will only be | |
3710 | // executed if the symbol is from dynobj. | |
3711 | // TODO(sasa): GNU ld also changes the value in non-dynamic symbol | |
3712 | // table. | |
3713 | ||
3714 | Mips16_stub_section<size, big_endian>* fn_stub = | |
3715 | mips_sym->template get_mips16_fn_stub<big_endian>(); | |
3716 | value = fn_stub->output_address(); | |
3717 | osym.put_st_size(fn_stub->section_size()); | |
3718 | } | |
3719 | ||
3720 | osym.put_st_value(value); | |
3721 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), | |
3722 | mips_sym->nonvis() - (elfcpp::STO_MIPS16 >> 2))); | |
3723 | } | |
3724 | else if ((mips_sym->is_micromips() | |
3725 | // Stubs are always microMIPS if there is any microMIPS code in | |
3726 | // the output. | |
3727 | || (this->is_output_micromips() && mips_sym->has_lazy_stub())) | |
3728 | && value != 0) | |
3729 | { | |
3730 | osym.put_st_value(value | 1); | |
3731 | osym.put_st_other(elfcpp::elf_st_other(sym->visibility(), | |
3732 | mips_sym->nonvis() - (elfcpp::STO_MICROMIPS >> 2))); | |
3733 | } | |
3734 | } | |
3735 | ||
3736 | private: | |
3737 | // The class which scans relocations. | |
3738 | class Scan | |
3739 | { | |
3740 | public: | |
3741 | Scan() | |
3742 | { } | |
3743 | ||
3744 | static inline int | |
3745 | get_reference_flags(unsigned int r_type); | |
3746 | ||
3747 | inline void | |
3748 | local(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3749 | Sized_relobj_file<size, big_endian>* object, | |
3750 | unsigned int data_shndx, | |
3751 | Output_section* output_section, | |
4d625b70 | 3752 | const Reltype& reloc, unsigned int r_type, |
9810d34d SS |
3753 | const elfcpp::Sym<size, big_endian>& lsym, |
3754 | bool is_discarded); | |
3755 | ||
3756 | inline void | |
3757 | local(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3758 | Sized_relobj_file<size, big_endian>* object, | |
3759 | unsigned int data_shndx, | |
3760 | Output_section* output_section, | |
4d625b70 | 3761 | const Relatype& reloc, unsigned int r_type, |
9810d34d SS |
3762 | const elfcpp::Sym<size, big_endian>& lsym, |
3763 | bool is_discarded); | |
3764 | ||
3765 | inline void | |
3766 | local(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3767 | Sized_relobj_file<size, big_endian>* object, | |
3768 | unsigned int data_shndx, | |
3769 | Output_section* output_section, | |
4d625b70 CC |
3770 | const Relatype* rela, |
3771 | const Reltype* rel, | |
9810d34d SS |
3772 | unsigned int rel_type, |
3773 | unsigned int r_type, | |
3774 | const elfcpp::Sym<size, big_endian>& lsym, | |
3775 | bool is_discarded); | |
3776 | ||
3777 | inline void | |
3778 | global(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3779 | Sized_relobj_file<size, big_endian>* object, | |
3780 | unsigned int data_shndx, | |
3781 | Output_section* output_section, | |
4d625b70 | 3782 | const Reltype& reloc, unsigned int r_type, |
9810d34d SS |
3783 | Symbol* gsym); |
3784 | ||
3785 | inline void | |
3786 | global(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3787 | Sized_relobj_file<size, big_endian>* object, | |
3788 | unsigned int data_shndx, | |
3789 | Output_section* output_section, | |
4d625b70 | 3790 | const Relatype& reloc, unsigned int r_type, |
9810d34d SS |
3791 | Symbol* gsym); |
3792 | ||
3793 | inline void | |
3794 | global(Symbol_table* symtab, Layout* layout, Target_mips* target, | |
3795 | Sized_relobj_file<size, big_endian>* object, | |
3796 | unsigned int data_shndx, | |
3797 | Output_section* output_section, | |
4d625b70 CC |
3798 | const Relatype* rela, |
3799 | const Reltype* rel, | |
9810d34d SS |
3800 | unsigned int rel_type, |
3801 | unsigned int r_type, | |
3802 | Symbol* gsym); | |
3803 | ||
3804 | inline bool | |
3805 | local_reloc_may_be_function_pointer(Symbol_table* , Layout*, | |
3806 | Target_mips*, | |
3807 | Sized_relobj_file<size, big_endian>*, | |
3808 | unsigned int, | |
3809 | Output_section*, | |
4d625b70 | 3810 | const Reltype&, |
9810d34d SS |
3811 | unsigned int, |
3812 | const elfcpp::Sym<size, big_endian>&) | |
3813 | { return false; } | |
3814 | ||
3815 | inline bool | |
3816 | global_reloc_may_be_function_pointer(Symbol_table*, Layout*, | |
3817 | Target_mips*, | |
3818 | Sized_relobj_file<size, big_endian>*, | |
3819 | unsigned int, | |
3820 | Output_section*, | |
4d625b70 | 3821 | const Reltype&, |
9810d34d SS |
3822 | unsigned int, Symbol*) |
3823 | { return false; } | |
3824 | ||
3825 | inline bool | |
3826 | local_reloc_may_be_function_pointer(Symbol_table*, Layout*, | |
3827 | Target_mips*, | |
3828 | Sized_relobj_file<size, big_endian>*, | |
3829 | unsigned int, | |
3830 | Output_section*, | |
4d625b70 | 3831 | const Relatype&, |
9810d34d SS |
3832 | unsigned int, |
3833 | const elfcpp::Sym<size, big_endian>&) | |
3834 | { return false; } | |
3835 | ||
3836 | inline bool | |
3837 | global_reloc_may_be_function_pointer(Symbol_table*, Layout*, | |
3838 | Target_mips*, | |
3839 | Sized_relobj_file<size, big_endian>*, | |
3840 | unsigned int, | |
3841 | Output_section*, | |
4d625b70 | 3842 | const Relatype&, |
9810d34d SS |
3843 | unsigned int, Symbol*) |
3844 | { return false; } | |
3845 | private: | |
3846 | static void | |
3847 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, | |
3848 | unsigned int r_type); | |
3849 | ||
3850 | static void | |
3851 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, | |
3852 | unsigned int r_type, Symbol*); | |
3853 | }; | |
3854 | ||
3855 | // The class which implements relocation. | |
3856 | class Relocate | |
3857 | { | |
3858 | public: | |
3859 | Relocate() | |
152c92b2 | 3860 | : calculated_value_(0), calculate_only_(false) |
9810d34d SS |
3861 | { } |
3862 | ||
3863 | ~Relocate() | |
3864 | { } | |
3865 | ||
47a9f4fc | 3866 | // Return whether a R_MIPS_32/R_MIPS_64 relocation needs to be applied. |
9810d34d | 3867 | inline bool |
47a9f4fc VR |
3868 | should_apply_static_reloc(const Mips_symbol<size>* gsym, |
3869 | unsigned int r_type, | |
3870 | Output_section* output_section, | |
3871 | Target_mips* target); | |
9810d34d SS |
3872 | |
3873 | // Do a relocation. Return false if the caller should not issue | |
3874 | // any warnings about this relocation. | |
3875 | inline bool | |
91a65d2f AM |
3876 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
3877 | Target_mips*, Output_section*, size_t, const unsigned char*, | |
3878 | const Sized_symbol<size>*, const Symbol_value<size>*, | |
3879 | unsigned char*, Mips_address, section_size_type); | |
152c92b2 VR |
3880 | |
3881 | private: | |
3882 | // Result of the relocation. | |
3883 | Valtype calculated_value_; | |
3884 | // Whether we have to calculate relocation instead of applying it. | |
3885 | bool calculate_only_; | |
9810d34d SS |
3886 | }; |
3887 | ||
9810d34d SS |
3888 | // This POD class holds the dynamic relocations that should be emitted instead |
3889 | // of R_MIPS_32, R_MIPS_REL32 and R_MIPS_64 relocations. We will emit these | |
3890 | // relocations if it turns out that the symbol does not have static | |
3891 | // relocations. | |
3892 | class Dyn_reloc | |
3893 | { | |
3894 | public: | |
3895 | Dyn_reloc(Mips_symbol<size>* sym, unsigned int r_type, | |
3896 | Mips_relobj<size, big_endian>* relobj, unsigned int shndx, | |
3897 | Output_section* output_section, Mips_address r_offset) | |
3898 | : sym_(sym), r_type_(r_type), relobj_(relobj), | |
3899 | shndx_(shndx), output_section_(output_section), | |
3900 | r_offset_(r_offset) | |
3901 | { } | |
3902 | ||
3903 | // Emit this reloc if appropriate. This is called after we have | |
3904 | // scanned all the relocations, so we know whether the symbol has | |
3905 | // static relocations. | |
3906 | void | |
3907 | emit(Reloc_section* rel_dyn, Mips_output_data_got<size, big_endian>* got, | |
3908 | Symbol_table* symtab) | |
3909 | { | |
3910 | if (!this->sym_->has_static_relocs()) | |
3911 | { | |
3912 | got->record_global_got_symbol(this->sym_, this->relobj_, | |
3913 | this->r_type_, true, false); | |
3914 | if (!symbol_references_local(this->sym_, | |
3915 | this->sym_->should_add_dynsym_entry(symtab))) | |
3916 | rel_dyn->add_global(this->sym_, this->r_type_, | |
3917 | this->output_section_, this->relobj_, | |
3918 | this->shndx_, this->r_offset_); | |
3919 | else | |
3920 | rel_dyn->add_symbolless_global_addend(this->sym_, this->r_type_, | |
3921 | this->output_section_, this->relobj_, | |
3922 | this->shndx_, this->r_offset_); | |
3923 | } | |
3924 | } | |
3925 | ||
3926 | private: | |
3927 | Mips_symbol<size>* sym_; | |
3928 | unsigned int r_type_; | |
3929 | Mips_relobj<size, big_endian>* relobj_; | |
3930 | unsigned int shndx_; | |
3931 | Output_section* output_section_; | |
3932 | Mips_address r_offset_; | |
3933 | }; | |
3934 | ||
3935 | // Adjust TLS relocation type based on the options and whether this | |
3936 | // is a local symbol. | |
3937 | static tls::Tls_optimization | |
3938 | optimize_tls_reloc(bool is_final, int r_type); | |
3939 | ||
3940 | // Return whether there is a GOT section. | |
3941 | bool | |
3942 | has_got_section() const | |
3943 | { return this->got_ != NULL; } | |
3944 | ||
3945 | // Check whether the given ELF header flags describe a 32-bit binary. | |
3946 | bool | |
3947 | mips_32bit_flags(elfcpp::Elf_Word); | |
3948 | ||
3949 | enum Mips_mach { | |
3950 | mach_mips3000 = 3000, | |
3951 | mach_mips3900 = 3900, | |
3952 | mach_mips4000 = 4000, | |
3953 | mach_mips4010 = 4010, | |
3954 | mach_mips4100 = 4100, | |
3955 | mach_mips4111 = 4111, | |
3956 | mach_mips4120 = 4120, | |
3957 | mach_mips4300 = 4300, | |
3958 | mach_mips4400 = 4400, | |
3959 | mach_mips4600 = 4600, | |
3960 | mach_mips4650 = 4650, | |
3961 | mach_mips5000 = 5000, | |
3962 | mach_mips5400 = 5400, | |
3963 | mach_mips5500 = 5500, | |
b52717c0 | 3964 | mach_mips5900 = 5900, |
9810d34d SS |
3965 | mach_mips6000 = 6000, |
3966 | mach_mips7000 = 7000, | |
3967 | mach_mips8000 = 8000, | |
3968 | mach_mips9000 = 9000, | |
3969 | mach_mips10000 = 10000, | |
3970 | mach_mips12000 = 12000, | |
3971 | mach_mips14000 = 14000, | |
3972 | mach_mips16000 = 16000, | |
3973 | mach_mips16 = 16, | |
3974 | mach_mips5 = 5, | |
3975 | mach_mips_loongson_2e = 3001, | |
3976 | mach_mips_loongson_2f = 3002, | |
3977 | mach_mips_loongson_3a = 3003, | |
3978 | mach_mips_sb1 = 12310201, // octal 'SB', 01 | |
3979 | mach_mips_octeon = 6501, | |
3980 | mach_mips_octeonp = 6601, | |
3981 | mach_mips_octeon2 = 6502, | |
b52717c0 | 3982 | mach_mips_octeon3 = 6503, |
9810d34d SS |
3983 | mach_mips_xlr = 887682, // decimal 'XLR' |
3984 | mach_mipsisa32 = 32, | |
3985 | mach_mipsisa32r2 = 33, | |
b52717c0 VR |
3986 | mach_mipsisa32r3 = 34, |
3987 | mach_mipsisa32r5 = 36, | |
f5b11759 | 3988 | mach_mipsisa32r6 = 37, |
9810d34d SS |
3989 | mach_mipsisa64 = 64, |
3990 | mach_mipsisa64r2 = 65, | |
b52717c0 VR |
3991 | mach_mipsisa64r3 = 66, |
3992 | mach_mipsisa64r5 = 68, | |
f5b11759 | 3993 | mach_mipsisa64r6 = 69, |
9810d34d SS |
3994 | mach_mips_micromips = 96 |
3995 | }; | |
3996 | ||
3997 | // Return the MACH for a MIPS e_flags value. | |
3998 | unsigned int | |
3999 | elf_mips_mach(elfcpp::Elf_Word); | |
4000 | ||
b52717c0 VR |
4001 | // Return the MACH for each .MIPS.abiflags ISA Extension. |
4002 | unsigned int | |
4003 | mips_isa_ext_mach(unsigned int); | |
4004 | ||
4005 | // Return the .MIPS.abiflags value representing each ISA Extension. | |
4006 | unsigned int | |
4007 | mips_isa_ext(unsigned int); | |
4008 | ||
4009 | // Update the isa_level, isa_rev, isa_ext fields of abiflags. | |
4010 | void | |
4011 | update_abiflags_isa(const std::string&, elfcpp::Elf_Word, | |
4012 | Mips_abiflags<big_endian>*); | |
4013 | ||
4014 | // Infer the content of the ABI flags based on the elf header. | |
4015 | void | |
4016 | infer_abiflags(Mips_relobj<size, big_endian>*, Mips_abiflags<big_endian>*); | |
4017 | ||
4018 | // Create abiflags from elf header or from .MIPS.abiflags section. | |
4019 | void | |
4020 | create_abiflags(Mips_relobj<size, big_endian>*, Mips_abiflags<big_endian>*); | |
4021 | ||
4022 | // Return the meaning of fp_abi, or "unknown" if not known. | |
4023 | const char* | |
4024 | fp_abi_string(int); | |
4025 | ||
4026 | // Select fp_abi. | |
4027 | int | |
4028 | select_fp_abi(const std::string&, int, int); | |
4029 | ||
4030 | // Merge attributes from input object. | |
4031 | void | |
4032 | merge_obj_attributes(const std::string&, const Attributes_section_data*); | |
4033 | ||
4034 | // Merge abiflags from input object. | |
4035 | void | |
4036 | merge_obj_abiflags(const std::string&, Mips_abiflags<big_endian>*); | |
4037 | ||
9810d34d SS |
4038 | // Check whether machine EXTENSION is an extension of machine BASE. |
4039 | bool | |
4040 | mips_mach_extends(unsigned int, unsigned int); | |
4041 | ||
b52717c0 | 4042 | // Merge file header flags from input object. |
9810d34d | 4043 | void |
b52717c0 VR |
4044 | merge_obj_e_flags(const std::string&, elfcpp::Elf_Word); |
4045 | ||
4046 | // Encode ISA level and revision as a single value. | |
4047 | int | |
4048 | level_rev(unsigned char isa_level, unsigned char isa_rev) const | |
4049 | { return (isa_level << 3) | isa_rev; } | |
9810d34d SS |
4050 | |
4051 | // True if we are linking for CPUs that are faster if JAL is converted to BAL. | |
4052 | static inline bool | |
4053 | jal_to_bal() | |
4054 | { return false; } | |
4055 | ||
4056 | // True if we are linking for CPUs that are faster if JALR is converted to | |
4057 | // BAL. This should be safe for all architectures. We enable this predicate | |
4058 | // for all CPUs. | |
4059 | static inline bool | |
4060 | jalr_to_bal() | |
4061 | { return true; } | |
4062 | ||
4063 | // True if we are linking for CPUs that are faster if JR is converted to B. | |
4064 | // This should be safe for all architectures. We enable this predicate for | |
4065 | // all CPUs. | |
4066 | static inline bool | |
4067 | jr_to_b() | |
4068 | { return true; } | |
4069 | ||
4070 | // Return the size of the GOT section. | |
4071 | section_size_type | |
4072 | got_size() const | |
4073 | { | |
4074 | gold_assert(this->got_ != NULL); | |
4075 | return this->got_->data_size(); | |
4076 | } | |
4077 | ||
4078 | // Create a PLT entry for a global symbol referenced by r_type relocation. | |
4079 | void | |
4080 | make_plt_entry(Symbol_table*, Layout*, Mips_symbol<size>*, | |
4081 | unsigned int r_type); | |
4082 | ||
4083 | // Get the PLT section. | |
4084 | Mips_output_data_plt<size, big_endian>* | |
4085 | plt_section() const | |
4086 | { | |
4087 | gold_assert(this->plt_ != NULL); | |
4088 | return this->plt_; | |
4089 | } | |
4090 | ||
4091 | // Get the GOT PLT section. | |
4092 | const Mips_output_data_plt<size, big_endian>* | |
4093 | got_plt_section() const | |
4094 | { | |
4095 | gold_assert(this->got_plt_ != NULL); | |
4096 | return this->got_plt_; | |
4097 | } | |
4098 | ||
4099 | // Copy a relocation against a global symbol. | |
4100 | void | |
4101 | copy_reloc(Symbol_table* symtab, Layout* layout, | |
4102 | Sized_relobj_file<size, big_endian>* object, | |
4103 | unsigned int shndx, Output_section* output_section, | |
47a9f4fc | 4104 | Symbol* sym, unsigned int r_type, Mips_address r_offset) |
9810d34d SS |
4105 | { |
4106 | this->copy_relocs_.copy_reloc(symtab, layout, | |
4107 | symtab->get_sized_symbol<size>(sym), | |
4108 | object, shndx, output_section, | |
47a9f4fc | 4109 | r_type, r_offset, 0, |
859d7987 | 4110 | this->rel_dyn_section(layout)); |
9810d34d SS |
4111 | } |
4112 | ||
4113 | void | |
4114 | dynamic_reloc(Mips_symbol<size>* sym, unsigned int r_type, | |
4115 | Mips_relobj<size, big_endian>* relobj, | |
4116 | unsigned int shndx, Output_section* output_section, | |
4117 | Mips_address r_offset) | |
4118 | { | |
4119 | this->dyn_relocs_.push_back(Dyn_reloc(sym, r_type, relobj, shndx, | |
4120 | output_section, r_offset)); | |
4121 | } | |
4122 | ||
4123 | // Calculate value of _gp symbol. | |
4124 | void | |
4125 | set_gp(Layout*, Symbol_table*); | |
4126 | ||
4127 | const char* | |
01b84e25 | 4128 | elf_mips_abi_name(elfcpp::Elf_Word e_flags); |
9810d34d SS |
4129 | const char* |
4130 | elf_mips_mach_name(elfcpp::Elf_Word e_flags); | |
4131 | ||
4132 | // Adds entries that describe how machines relate to one another. The entries | |
4133 | // are ordered topologically with MIPS I extensions listed last. First | |
4134 | // element is extension, second element is base. | |
4135 | void | |
4136 | add_machine_extensions() | |
4137 | { | |
4138 | // MIPS64r2 extensions. | |
b52717c0 | 4139 | this->add_extension(mach_mips_octeon3, mach_mips_octeon2); |
9810d34d SS |
4140 | this->add_extension(mach_mips_octeon2, mach_mips_octeonp); |
4141 | this->add_extension(mach_mips_octeonp, mach_mips_octeon); | |
4142 | this->add_extension(mach_mips_octeon, mach_mipsisa64r2); | |
b52717c0 | 4143 | this->add_extension(mach_mips_loongson_3a, mach_mipsisa64r2); |
9810d34d SS |
4144 | |
4145 | // MIPS64 extensions. | |
4146 | this->add_extension(mach_mipsisa64r2, mach_mipsisa64); | |
4147 | this->add_extension(mach_mips_sb1, mach_mipsisa64); | |
4148 | this->add_extension(mach_mips_xlr, mach_mipsisa64); | |
9810d34d SS |
4149 | |
4150 | // MIPS V extensions. | |
4151 | this->add_extension(mach_mipsisa64, mach_mips5); | |
4152 | ||
4153 | // R10000 extensions. | |
4154 | this->add_extension(mach_mips12000, mach_mips10000); | |
4155 | this->add_extension(mach_mips14000, mach_mips10000); | |
4156 | this->add_extension(mach_mips16000, mach_mips10000); | |
4157 | ||
4158 | // R5000 extensions. Note: the vr5500 ISA is an extension of the core | |
4159 | // vr5400 ISA, but doesn't include the multimedia stuff. It seems | |
4160 | // better to allow vr5400 and vr5500 code to be merged anyway, since | |
4161 | // many libraries will just use the core ISA. Perhaps we could add | |
4162 | // some sort of ASE flag if this ever proves a problem. | |
4163 | this->add_extension(mach_mips5500, mach_mips5400); | |
4164 | this->add_extension(mach_mips5400, mach_mips5000); | |
4165 | ||
4166 | // MIPS IV extensions. | |
4167 | this->add_extension(mach_mips5, mach_mips8000); | |
4168 | this->add_extension(mach_mips10000, mach_mips8000); | |
4169 | this->add_extension(mach_mips5000, mach_mips8000); | |
4170 | this->add_extension(mach_mips7000, mach_mips8000); | |
4171 | this->add_extension(mach_mips9000, mach_mips8000); | |
4172 | ||
4173 | // VR4100 extensions. | |
4174 | this->add_extension(mach_mips4120, mach_mips4100); | |
4175 | this->add_extension(mach_mips4111, mach_mips4100); | |
4176 | ||
4177 | // MIPS III extensions. | |
4178 | this->add_extension(mach_mips_loongson_2e, mach_mips4000); | |
4179 | this->add_extension(mach_mips_loongson_2f, mach_mips4000); | |
4180 | this->add_extension(mach_mips8000, mach_mips4000); | |
4181 | this->add_extension(mach_mips4650, mach_mips4000); | |
4182 | this->add_extension(mach_mips4600, mach_mips4000); | |
4183 | this->add_extension(mach_mips4400, mach_mips4000); | |
4184 | this->add_extension(mach_mips4300, mach_mips4000); | |
4185 | this->add_extension(mach_mips4100, mach_mips4000); | |
4186 | this->add_extension(mach_mips4010, mach_mips4000); | |
b52717c0 | 4187 | this->add_extension(mach_mips5900, mach_mips4000); |
9810d34d SS |
4188 | |
4189 | // MIPS32 extensions. | |
4190 | this->add_extension(mach_mipsisa32r2, mach_mipsisa32); | |
4191 | ||
4192 | // MIPS II extensions. | |
4193 | this->add_extension(mach_mips4000, mach_mips6000); | |
4194 | this->add_extension(mach_mipsisa32, mach_mips6000); | |
4195 | ||
4196 | // MIPS I extensions. | |
4197 | this->add_extension(mach_mips6000, mach_mips3000); | |
4198 | this->add_extension(mach_mips3900, mach_mips3000); | |
4199 | } | |
4200 | ||
4201 | // Add value to MIPS extenstions. | |
4202 | void | |
4203 | add_extension(unsigned int base, unsigned int extension) | |
4204 | { | |
4205 | std::pair<unsigned int, unsigned int> ext(base, extension); | |
4206 | this->mips_mach_extensions_.push_back(ext); | |
4207 | } | |
4208 | ||
4209 | // Return the number of entries in the .dynsym section. | |
4210 | unsigned int get_dt_mips_symtabno() const | |
4211 | { | |
4212 | return ((unsigned int)(this->layout_->dynsym_section()->data_size() | |
4213 | / elfcpp::Elf_sizes<size>::sym_size)); | |
4214 | // TODO(sasa): Entry size is MIPS_ELF_SYM_SIZE. | |
4215 | } | |
4216 | ||
4217 | // Information about this specific target which we pass to the | |
4218 | // general Target structure. | |
62661c93 | 4219 | static const Target::Target_info mips_info; |
9810d34d SS |
4220 | // The GOT section. |
4221 | Mips_output_data_got<size, big_endian>* got_; | |
4222 | // gp symbol. It has the value of .got + 0x7FF0. | |
4223 | Sized_symbol<size>* gp_; | |
4224 | // The PLT section. | |
4225 | Mips_output_data_plt<size, big_endian>* plt_; | |
4226 | // The GOT PLT section. | |
4227 | Output_data_space* got_plt_; | |
4228 | // The dynamic reloc section. | |
4229 | Reloc_section* rel_dyn_; | |
a8ecc9fe VR |
4230 | // The .rld_map section. |
4231 | Output_data_zero_fill* rld_map_; | |
9810d34d SS |
4232 | // Relocs saved to avoid a COPY reloc. |
4233 | Mips_copy_relocs<elfcpp::SHT_REL, size, big_endian> copy_relocs_; | |
4234 | ||
4235 | // A list of dyn relocs to be saved. | |
4236 | std::vector<Dyn_reloc> dyn_relocs_; | |
4237 | ||
4238 | // The LA25 stub section. | |
4239 | Mips_output_data_la25_stub<size, big_endian>* la25_stub_; | |
4240 | // Architecture extensions. | |
4241 | std::vector<std::pair<unsigned int, unsigned int> > mips_mach_extensions_; | |
4242 | // .MIPS.stubs | |
4243 | Mips_output_data_mips_stubs<size, big_endian>* mips_stubs_; | |
4244 | ||
b52717c0 VR |
4245 | // Attributes section data in output. |
4246 | Attributes_section_data* attributes_section_data_; | |
4247 | // .MIPS.abiflags section data in output. | |
4248 | Mips_abiflags<big_endian>* abiflags_; | |
4249 | ||
9810d34d SS |
4250 | unsigned int mach_; |
4251 | Layout* layout_; | |
4252 | ||
4253 | typename std::list<got16_addend<size, big_endian> > got16_addends_; | |
4254 | ||
b52717c0 VR |
4255 | // Whether there is an input .MIPS.abiflags section. |
4256 | bool has_abiflags_section_; | |
4257 | ||
9810d34d SS |
4258 | // Whether the entry symbol is mips16 or micromips. |
4259 | bool entry_symbol_is_compressed_; | |
4260 | ||
4261 | // Whether we can use only 32-bit microMIPS instructions. | |
4262 | // TODO(sasa): This should be a linker option. | |
4263 | bool insn32_; | |
4264 | }; | |
4265 | ||
9810d34d SS |
4266 | // Helper structure for R_MIPS*_HI16/LO16 and R_MIPS*_GOT16/LO16 relocations. |
4267 | // It records high part of the relocation pair. | |
4268 | ||
4269 | template<int size, bool big_endian> | |
4270 | struct reloc_high | |
4271 | { | |
4272 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
4273 | ||
4274 | reloc_high(unsigned char* _view, const Mips_relobj<size, big_endian>* _object, | |
4275 | const Symbol_value<size>* _psymval, Mips_address _addend, | |
3d0064a9 | 4276 | unsigned int _r_type, unsigned int _r_sym, bool _extract_addend, |
9810d34d SS |
4277 | Mips_address _address = 0, bool _gp_disp = false) |
4278 | : view(_view), object(_object), psymval(_psymval), addend(_addend), | |
3d0064a9 CC |
4279 | r_type(_r_type), r_sym(_r_sym), extract_addend(_extract_addend), |
4280 | address(_address), gp_disp(_gp_disp) | |
9810d34d SS |
4281 | { } |
4282 | ||
4283 | unsigned char* view; | |
4284 | const Mips_relobj<size, big_endian>* object; | |
4285 | const Symbol_value<size>* psymval; | |
4286 | Mips_address addend; | |
4287 | unsigned int r_type; | |
3d0064a9 | 4288 | unsigned int r_sym; |
9810d34d SS |
4289 | bool extract_addend; |
4290 | Mips_address address; | |
4291 | bool gp_disp; | |
4292 | }; | |
4293 | ||
4294 | template<int size, bool big_endian> | |
4295 | class Mips_relocate_functions : public Relocate_functions<size, big_endian> | |
4296 | { | |
4297 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address; | |
47a9f4fc | 4298 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; |
9810d34d SS |
4299 | typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype16; |
4300 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32; | |
47a9f4fc | 4301 | typedef typename elfcpp::Swap<64, big_endian>::Valtype Valtype64; |
9810d34d SS |
4302 | |
4303 | public: | |
4304 | typedef enum | |
4305 | { | |
f5b11759 VR |
4306 | STATUS_OKAY, // No error during relocation. |
4307 | STATUS_OVERFLOW, // Relocation overflow. | |
4308 | STATUS_BAD_RELOC, // Relocation cannot be applied. | |
4309 | STATUS_PCREL_UNALIGNED // Unaligned PC-relative relocation. | |
9810d34d SS |
4310 | } Status; |
4311 | ||
4312 | private: | |
4313 | typedef Relocate_functions<size, big_endian> Base; | |
4314 | typedef Mips_relocate_functions<size, big_endian> This; | |
4315 | ||
4316 | static typename std::list<reloc_high<size, big_endian> > hi16_relocs; | |
4317 | static typename std::list<reloc_high<size, big_endian> > got16_relocs; | |
f5b11759 | 4318 | static typename std::list<reloc_high<size, big_endian> > pchi16_relocs; |
9810d34d | 4319 | |
47a9f4fc VR |
4320 | template<int valsize> |
4321 | static inline typename This::Status | |
4322 | check_overflow(Valtype value) | |
4323 | { | |
4324 | if (size == 32) | |
4325 | return (Bits<valsize>::has_overflow32(value) | |
4326 | ? This::STATUS_OVERFLOW | |
4327 | : This::STATUS_OKAY); | |
4328 | ||
4329 | return (Bits<valsize>::has_overflow(value) | |
4330 | ? This::STATUS_OVERFLOW | |
4331 | : This::STATUS_OKAY); | |
4332 | } | |
4333 | ||
4334 | static inline bool | |
4335 | should_shuffle_micromips_reloc(unsigned int r_type) | |
4336 | { | |
4337 | return (micromips_reloc(r_type) | |
4338 | && r_type != elfcpp::R_MICROMIPS_PC7_S1 | |
4339 | && r_type != elfcpp::R_MICROMIPS_PC10_S1); | |
4340 | } | |
4341 | ||
4342 | public: | |
9810d34d SS |
4343 | // R_MIPS16_26 is used for the mips16 jal and jalx instructions. |
4344 | // Most mips16 instructions are 16 bits, but these instructions | |
4345 | // are 32 bits. | |
4346 | // | |
4347 | // The format of these instructions is: | |
4348 | // | |
4349 | // +--------------+--------------------------------+ | |
4350 | // | JALX | X| Imm 20:16 | Imm 25:21 | | |
4351 | // +--------------+--------------------------------+ | |
4352 | // | Immediate 15:0 | | |
4353 | // +-----------------------------------------------+ | |
4354 | // | |
4355 | // JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx. | |
4356 | // Note that the immediate value in the first word is swapped. | |
4357 | // | |
4358 | // When producing a relocatable object file, R_MIPS16_26 is | |
4359 | // handled mostly like R_MIPS_26. In particular, the addend is | |
4360 | // stored as a straight 26-bit value in a 32-bit instruction. | |
4361 | // (gas makes life simpler for itself by never adjusting a | |
4362 | // R_MIPS16_26 reloc to be against a section, so the addend is | |
4363 | // always zero). However, the 32 bit instruction is stored as 2 | |
4364 | // 16-bit values, rather than a single 32-bit value. In a | |
4365 | // big-endian file, the result is the same; in a little-endian | |
4366 | // file, the two 16-bit halves of the 32 bit value are swapped. | |
4367 | // This is so that a disassembler can recognize the jal | |
4368 | // instruction. | |
4369 | // | |
4370 | // When doing a final link, R_MIPS16_26 is treated as a 32 bit | |
4371 | // instruction stored as two 16-bit values. The addend A is the | |
4372 | // contents of the targ26 field. The calculation is the same as | |
4373 | // R_MIPS_26. When storing the calculated value, reorder the | |
4374 | // immediate value as shown above, and don't forget to store the | |
4375 | // value as two 16-bit values. | |
4376 | // | |
4377 | // To put it in MIPS ABI terms, the relocation field is T-targ26-16, | |
4378 | // defined as | |
4379 | // | |
4380 | // big-endian: | |
4381 | // +--------+----------------------+ | |
4382 | // | | | | |
4383 | // | | targ26-16 | | |
4384 | // |31 26|25 0| | |
4385 | // +--------+----------------------+ | |
4386 | // | |
4387 | // little-endian: | |
4388 | // +----------+------+-------------+ | |
4389 | // | | | | | |
4390 | // | sub1 | | sub2 | | |
4391 | // |0 9|10 15|16 31| | |
4392 | // +----------+--------------------+ | |
4393 | // where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is | |
4394 | // ((sub1 << 16) | sub2)). | |
4395 | // | |
4396 | // When producing a relocatable object file, the calculation is | |
4397 | // (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2) | |
4398 | // When producing a fully linked file, the calculation is | |
4399 | // let R = (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2) | |
4400 | // ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff) | |
4401 | // | |
4402 | // The table below lists the other MIPS16 instruction relocations. | |
4403 | // Each one is calculated in the same way as the non-MIPS16 relocation | |
4404 | // given on the right, but using the extended MIPS16 layout of 16-bit | |
4405 | // immediate fields: | |
4406 | // | |
4407 | // R_MIPS16_GPREL R_MIPS_GPREL16 | |
4408 | // R_MIPS16_GOT16 R_MIPS_GOT16 | |
4409 | // R_MIPS16_CALL16 R_MIPS_CALL16 | |
4410 | // R_MIPS16_HI16 R_MIPS_HI16 | |
4411 | // R_MIPS16_LO16 R_MIPS_LO16 | |
4412 | // | |
4413 | // A typical instruction will have a format like this: | |
4414 | // | |
4415 | // +--------------+--------------------------------+ | |
4416 | // | EXTEND | Imm 10:5 | Imm 15:11 | | |
4417 | // +--------------+--------------------------------+ | |
4418 | // | Major | rx | ry | Imm 4:0 | | |
4419 | // +--------------+--------------------------------+ | |
4420 | // | |
4421 | // EXTEND is the five bit value 11110. Major is the instruction | |
4422 | // opcode. | |
4423 | // | |
4424 | // All we need to do here is shuffle the bits appropriately. | |
4425 | // As above, the two 16-bit halves must be swapped on a | |
4426 | // little-endian system. | |
4427 | ||
4428 | // Similar to MIPS16, the two 16-bit halves in microMIPS must be swapped | |
4429 | // on a little-endian system. This does not apply to R_MICROMIPS_PC7_S1 | |
4430 | // and R_MICROMIPS_PC10_S1 relocs that apply to 16-bit instructions. | |
4431 | ||
9810d34d SS |
4432 | static void |
4433 | mips_reloc_unshuffle(unsigned char* view, unsigned int r_type, | |
4434 | bool jal_shuffle) | |
4435 | { | |
4436 | if (!mips16_reloc(r_type) | |
4437 | && !should_shuffle_micromips_reloc(r_type)) | |
4438 | return; | |
4439 | ||
4440 | // Pick up the first and second halfwords of the instruction. | |
4441 | Valtype16 first = elfcpp::Swap<16, big_endian>::readval(view); | |
4442 | Valtype16 second = elfcpp::Swap<16, big_endian>::readval(view + 2); | |
4443 | Valtype32 val; | |
4444 | ||
4445 | if (micromips_reloc(r_type) | |
4446 | || (r_type == elfcpp::R_MIPS16_26 && !jal_shuffle)) | |
4447 | val = first << 16 | second; | |
4448 | else if (r_type != elfcpp::R_MIPS16_26) | |
4449 | val = (((first & 0xf800) << 16) | ((second & 0xffe0) << 11) | |
4450 | | ((first & 0x1f) << 11) | (first & 0x7e0) | (second & 0x1f)); | |
4451 | else | |
4452 | val = (((first & 0xfc00) << 16) | ((first & 0x3e0) << 11) | |
4453 | | ((first & 0x1f) << 21) | second); | |
4454 | ||
4455 | elfcpp::Swap<32, big_endian>::writeval(view, val); | |
4456 | } | |
4457 | ||
4458 | static void | |
4459 | mips_reloc_shuffle(unsigned char* view, unsigned int r_type, bool jal_shuffle) | |
4460 | { | |
4461 | if (!mips16_reloc(r_type) | |
4462 | && !should_shuffle_micromips_reloc(r_type)) | |
4463 | return; | |
4464 | ||
4465 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
4466 | Valtype16 first, second; | |
4467 | ||
4468 | if (micromips_reloc(r_type) | |
4469 | || (r_type == elfcpp::R_MIPS16_26 && !jal_shuffle)) | |
4470 | { | |
4471 | second = val & 0xffff; | |
4472 | first = val >> 16; | |
4473 | } | |
4474 | else if (r_type != elfcpp::R_MIPS16_26) | |
4475 | { | |
4476 | second = ((val >> 11) & 0xffe0) | (val & 0x1f); | |
4477 | first = ((val >> 16) & 0xf800) | ((val >> 11) & 0x1f) | (val & 0x7e0); | |
4478 | } | |
4479 | else | |
4480 | { | |
4481 | second = val & 0xffff; | |
4482 | first = ((val >> 16) & 0xfc00) | ((val >> 11) & 0x3e0) | |
4483 | | ((val >> 21) & 0x1f); | |
4484 | } | |
4485 | ||
4486 | elfcpp::Swap<16, big_endian>::writeval(view + 2, second); | |
4487 | elfcpp::Swap<16, big_endian>::writeval(view, first); | |
4488 | } | |
4489 | ||
9810d34d SS |
4490 | // R_MIPS_16: S + sign-extend(A) |
4491 | static inline typename This::Status | |
4492 | rel16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4493 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc | 4494 | bool extract_addend, bool calculate_only, Valtype* calculated_value) |
9810d34d | 4495 | { |
9810d34d SS |
4496 | Valtype16* wv = reinterpret_cast<Valtype16*>(view); |
4497 | Valtype16 val = elfcpp::Swap<16, big_endian>::readval(wv); | |
4498 | ||
47a9f4fc VR |
4499 | Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val) |
4500 | : addend_a); | |
9810d34d | 4501 | |
47a9f4fc | 4502 | Valtype x = psymval->value(object, addend); |
9810d34d | 4503 | val = Bits<16>::bit_select32(val, x, 0xffffU); |
47a9f4fc VR |
4504 | |
4505 | if (calculate_only) | |
4506 | { | |
4507 | *calculated_value = x; | |
4508 | return This::STATUS_OKAY; | |
4509 | } | |
4510 | else | |
4511 | elfcpp::Swap<16, big_endian>::writeval(wv, val); | |
4512 | ||
4513 | return check_overflow<16>(x); | |
9810d34d SS |
4514 | } |
4515 | ||
4516 | // R_MIPS_32: S + A | |
4517 | static inline typename This::Status | |
4518 | rel32(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4519 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc | 4520 | bool extract_addend, bool calculate_only, Valtype* calculated_value) |
9810d34d | 4521 | { |
9810d34d | 4522 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
47a9f4fc | 4523 | Valtype addend = (extract_addend |
9810d34d | 4524 | ? elfcpp::Swap<32, big_endian>::readval(wv) |
47a9f4fc VR |
4525 | : addend_a); |
4526 | Valtype x = psymval->value(object, addend); | |
4527 | ||
4528 | if (calculate_only) | |
4529 | *calculated_value = x; | |
4530 | else | |
4531 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
4532 | ||
9810d34d SS |
4533 | return This::STATUS_OKAY; |
4534 | } | |
4535 | ||
4536 | // R_MIPS_JALR, R_MICROMIPS_JALR | |
4537 | static inline typename This::Status | |
4538 | reljalr(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4539 | const Symbol_value<size>* psymval, Mips_address address, | |
4540 | Mips_address addend_a, bool extract_addend, bool cross_mode_jump, | |
47a9f4fc VR |
4541 | unsigned int r_type, bool jalr_to_bal, bool jr_to_b, |
4542 | bool calculate_only, Valtype* calculated_value) | |
9810d34d | 4543 | { |
9810d34d | 4544 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
47a9f4fc | 4545 | Valtype addend = extract_addend ? 0 : addend_a; |
9810d34d SS |
4546 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); |
4547 | ||
4548 | // Try converting J(AL)R to B(AL), if the target is in range. | |
1e1247c8 | 4549 | if (r_type == elfcpp::R_MIPS_JALR |
9810d34d SS |
4550 | && !cross_mode_jump |
4551 | && ((jalr_to_bal && val == 0x0320f809) // jalr t9 | |
4552 | || (jr_to_b && val == 0x03200008))) // jr t9 | |
4553 | { | |
4554 | int offset = psymval->value(object, addend) - (address + 4); | |
4555 | if (!Bits<18>::has_overflow32(offset)) | |
4556 | { | |
4557 | if (val == 0x03200008) // jr t9 | |
4558 | val = 0x10000000 | (((Valtype32)offset >> 2) & 0xffff); // b addr | |
4559 | else | |
4560 | val = 0x04110000 | (((Valtype32)offset >> 2) & 0xffff); //bal addr | |
4561 | } | |
4562 | } | |
4563 | ||
47a9f4fc VR |
4564 | if (calculate_only) |
4565 | *calculated_value = val; | |
4566 | else | |
4567 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4568 | ||
9810d34d SS |
4569 | return This::STATUS_OKAY; |
4570 | } | |
4571 | ||
4572 | // R_MIPS_PC32: S + A - P | |
4573 | static inline typename This::Status | |
4574 | relpc32(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4575 | const Symbol_value<size>* psymval, Mips_address address, | |
47a9f4fc VR |
4576 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
4577 | Valtype* calculated_value) | |
9810d34d | 4578 | { |
9810d34d | 4579 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
47a9f4fc | 4580 | Valtype addend = (extract_addend |
9810d34d | 4581 | ? elfcpp::Swap<32, big_endian>::readval(wv) |
47a9f4fc VR |
4582 | : addend_a); |
4583 | Valtype x = psymval->value(object, addend) - address; | |
4584 | ||
4585 | if (calculate_only) | |
4586 | *calculated_value = x; | |
4587 | else | |
4588 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
4589 | ||
9810d34d SS |
4590 | return This::STATUS_OKAY; |
4591 | } | |
4592 | ||
4593 | // R_MIPS_26, R_MIPS16_26, R_MICROMIPS_26_S1 | |
4594 | static inline typename This::Status | |
4595 | rel26(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4596 | const Symbol_value<size>* psymval, Mips_address address, | |
4597 | bool local, Mips_address addend_a, bool extract_addend, | |
4598 | const Symbol* gsym, bool cross_mode_jump, unsigned int r_type, | |
47a9f4fc | 4599 | bool jal_to_bal, bool calculate_only, Valtype* calculated_value) |
9810d34d | 4600 | { |
9810d34d SS |
4601 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4602 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4603 | ||
47a9f4fc | 4604 | Valtype addend; |
9810d34d SS |
4605 | if (extract_addend) |
4606 | { | |
4607 | if (r_type == elfcpp::R_MICROMIPS_26_S1) | |
4608 | addend = (val & 0x03ffffff) << 1; | |
4609 | else | |
4610 | addend = (val & 0x03ffffff) << 2; | |
4611 | } | |
4612 | else | |
4613 | addend = addend_a; | |
4614 | ||
4615 | // Make sure the target of JALX is word-aligned. Bit 0 must be | |
4616 | // the correct ISA mode selector and bit 1 must be 0. | |
47a9f4fc | 4617 | if (!calculate_only && cross_mode_jump |
9810d34d SS |
4618 | && (psymval->value(object, 0) & 3) != (r_type == elfcpp::R_MIPS_26)) |
4619 | { | |
4620 | gold_warning(_("JALX to a non-word-aligned address")); | |
9810d34d SS |
4621 | return This::STATUS_BAD_RELOC; |
4622 | } | |
4623 | ||
4624 | // Shift is 2, unusually, for microMIPS JALX. | |
4625 | unsigned int shift = | |
4626 | (!cross_mode_jump && r_type == elfcpp::R_MICROMIPS_26_S1) ? 1 : 2; | |
4627 | ||
47a9f4fc | 4628 | Valtype x; |
9810d34d SS |
4629 | if (local) |
4630 | x = addend | ((address + 4) & (0xfc000000 << shift)); | |
4631 | else | |
4632 | { | |
4633 | if (shift == 1) | |
4634 | x = Bits<27>::sign_extend32(addend); | |
4635 | else | |
4636 | x = Bits<28>::sign_extend32(addend); | |
4637 | } | |
4638 | x = psymval->value(object, x) >> shift; | |
4639 | ||
c3847462 VR |
4640 | if (!calculate_only && !local && !gsym->is_weak_undefined() |
4641 | && ((x >> 26) != ((address + 4) >> (26 + shift)))) | |
4642 | return This::STATUS_OVERFLOW; | |
9810d34d SS |
4643 | |
4644 | val = Bits<32>::bit_select32(val, x, 0x03ffffff); | |
4645 | ||
4646 | // If required, turn JAL into JALX. | |
4647 | if (cross_mode_jump) | |
4648 | { | |
4649 | bool ok; | |
4650 | Valtype32 opcode = val >> 26; | |
4651 | Valtype32 jalx_opcode; | |
4652 | ||
4653 | // Check to see if the opcode is already JAL or JALX. | |
4654 | if (r_type == elfcpp::R_MIPS16_26) | |
4655 | { | |
4656 | ok = (opcode == 0x6) || (opcode == 0x7); | |
4657 | jalx_opcode = 0x7; | |
4658 | } | |
4659 | else if (r_type == elfcpp::R_MICROMIPS_26_S1) | |
4660 | { | |
4661 | ok = (opcode == 0x3d) || (opcode == 0x3c); | |
4662 | jalx_opcode = 0x3c; | |
4663 | } | |
4664 | else | |
4665 | { | |
4666 | ok = (opcode == 0x3) || (opcode == 0x1d); | |
4667 | jalx_opcode = 0x1d; | |
4668 | } | |
4669 | ||
4670 | // If the opcode is not JAL or JALX, there's a problem. We cannot | |
4671 | // convert J or JALS to JALX. | |
47a9f4fc | 4672 | if (!calculate_only && !ok) |
9810d34d SS |
4673 | { |
4674 | gold_error(_("Unsupported jump between ISA modes; consider " | |
4675 | "recompiling with interlinking enabled.")); | |
4676 | return This::STATUS_BAD_RELOC; | |
4677 | } | |
4678 | ||
4679 | // Make this the JALX opcode. | |
4680 | val = (val & ~(0x3f << 26)) | (jalx_opcode << 26); | |
4681 | } | |
4682 | ||
4683 | // Try converting JAL to BAL, if the target is in range. | |
4684 | if (!parameters->options().relocatable() | |
4685 | && !cross_mode_jump | |
4686 | && ((jal_to_bal | |
4687 | && r_type == elfcpp::R_MIPS_26 | |
4688 | && (val >> 26) == 0x3))) // jal addr | |
4689 | { | |
4690 | Valtype32 dest = (x << 2) | (((address + 4) >> 28) << 28); | |
4691 | int offset = dest - (address + 4); | |
4692 | if (!Bits<18>::has_overflow32(offset)) | |
4693 | { | |
4694 | if (val == 0x03200008) // jr t9 | |
4695 | val = 0x10000000 | (((Valtype32)offset >> 2) & 0xffff); // b addr | |
4696 | else | |
4697 | val = 0x04110000 | (((Valtype32)offset >> 2) & 0xffff); //bal addr | |
4698 | } | |
4699 | } | |
4700 | ||
47a9f4fc VR |
4701 | if (calculate_only) |
4702 | *calculated_value = val; | |
4703 | else | |
4704 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4705 | ||
9810d34d SS |
4706 | return This::STATUS_OKAY; |
4707 | } | |
4708 | ||
4709 | // R_MIPS_PC16 | |
4710 | static inline typename This::Status | |
4711 | relpc16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4712 | const Symbol_value<size>* psymval, Mips_address address, | |
47a9f4fc VR |
4713 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
4714 | Valtype* calculated_value) | |
9810d34d | 4715 | { |
9810d34d SS |
4716 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4717 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4718 | ||
47a9f4fc VR |
4719 | Valtype addend = (extract_addend |
4720 | ? Bits<18>::sign_extend32((val & 0xffff) << 2) | |
4721 | : addend_a); | |
9810d34d | 4722 | |
47a9f4fc | 4723 | Valtype x = psymval->value(object, addend) - address; |
9810d34d | 4724 | val = Bits<16>::bit_select32(val, x >> 2, 0xffff); |
47a9f4fc VR |
4725 | |
4726 | if (calculate_only) | |
4727 | { | |
4728 | *calculated_value = x >> 2; | |
4729 | return This::STATUS_OKAY; | |
4730 | } | |
4731 | else | |
4732 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4733 | ||
beceef50 VR |
4734 | if (psymval->value(object, addend) & 3) |
4735 | return This::STATUS_PCREL_UNALIGNED; | |
4736 | ||
47a9f4fc | 4737 | return check_overflow<18>(x); |
9810d34d SS |
4738 | } |
4739 | ||
f5b11759 VR |
4740 | // R_MIPS_PC21_S2 |
4741 | static inline typename This::Status | |
4742 | relpc21(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4743 | const Symbol_value<size>* psymval, Mips_address address, | |
4744 | Mips_address addend_a, bool extract_addend, bool calculate_only, | |
4745 | Valtype* calculated_value) | |
4746 | { | |
4747 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
4748 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4749 | ||
4750 | Valtype addend = (extract_addend | |
4751 | ? Bits<23>::sign_extend32((val & 0x1fffff) << 2) | |
4752 | : addend_a); | |
4753 | ||
4754 | Valtype x = psymval->value(object, addend) - address; | |
4755 | val = Bits<21>::bit_select32(val, x >> 2, 0x1fffff); | |
4756 | ||
4757 | if (calculate_only) | |
4758 | { | |
4759 | *calculated_value = x >> 2; | |
4760 | return This::STATUS_OKAY; | |
4761 | } | |
4762 | else | |
4763 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4764 | ||
4765 | if (psymval->value(object, addend) & 3) | |
4766 | return This::STATUS_PCREL_UNALIGNED; | |
4767 | ||
4768 | return check_overflow<23>(x); | |
4769 | } | |
4770 | ||
4771 | // R_MIPS_PC26_S2 | |
4772 | static inline typename This::Status | |
4773 | relpc26(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4774 | const Symbol_value<size>* psymval, Mips_address address, | |
4775 | Mips_address addend_a, bool extract_addend, bool calculate_only, | |
4776 | Valtype* calculated_value) | |
4777 | { | |
4778 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
4779 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4780 | ||
4781 | Valtype addend = (extract_addend | |
4782 | ? Bits<28>::sign_extend32((val & 0x3ffffff) << 2) | |
4783 | : addend_a); | |
4784 | ||
4785 | Valtype x = psymval->value(object, addend) - address; | |
4786 | val = Bits<26>::bit_select32(val, x >> 2, 0x3ffffff); | |
4787 | ||
4788 | if (calculate_only) | |
4789 | { | |
4790 | *calculated_value = x >> 2; | |
4791 | return This::STATUS_OKAY; | |
4792 | } | |
4793 | else | |
4794 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4795 | ||
4796 | if (psymval->value(object, addend) & 3) | |
4797 | return This::STATUS_PCREL_UNALIGNED; | |
4798 | ||
4799 | return check_overflow<28>(x); | |
4800 | } | |
4801 | ||
4802 | // R_MIPS_PC18_S3 | |
4803 | static inline typename This::Status | |
4804 | relpc18(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4805 | const Symbol_value<size>* psymval, Mips_address address, | |
4806 | Mips_address addend_a, bool extract_addend, bool calculate_only, | |
4807 | Valtype* calculated_value) | |
4808 | { | |
4809 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
4810 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4811 | ||
4812 | Valtype addend = (extract_addend | |
4813 | ? Bits<21>::sign_extend32((val & 0x3ffff) << 3) | |
4814 | : addend_a); | |
4815 | ||
4816 | Valtype x = psymval->value(object, addend) - ((address | 7) ^ 7); | |
4817 | val = Bits<18>::bit_select32(val, x >> 3, 0x3ffff); | |
4818 | ||
4819 | if (calculate_only) | |
4820 | { | |
4821 | *calculated_value = x >> 3; | |
4822 | return This::STATUS_OKAY; | |
4823 | } | |
4824 | else | |
4825 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4826 | ||
4827 | if (psymval->value(object, addend) & 7) | |
4828 | return This::STATUS_PCREL_UNALIGNED; | |
4829 | ||
4830 | return check_overflow<21>(x); | |
4831 | } | |
4832 | ||
4833 | // R_MIPS_PC19_S2 | |
4834 | static inline typename This::Status | |
4835 | relpc19(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4836 | const Symbol_value<size>* psymval, Mips_address address, | |
4837 | Mips_address addend_a, bool extract_addend, bool calculate_only, | |
4838 | Valtype* calculated_value) | |
4839 | { | |
4840 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
4841 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4842 | ||
4843 | Valtype addend = (extract_addend | |
4844 | ? Bits<21>::sign_extend32((val & 0x7ffff) << 2) | |
4845 | : addend_a); | |
4846 | ||
4847 | Valtype x = psymval->value(object, addend) - address; | |
4848 | val = Bits<19>::bit_select32(val, x >> 2, 0x7ffff); | |
4849 | ||
4850 | if (calculate_only) | |
4851 | { | |
4852 | *calculated_value = x >> 2; | |
4853 | return This::STATUS_OKAY; | |
4854 | } | |
4855 | else | |
4856 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4857 | ||
4858 | if (psymval->value(object, addend) & 3) | |
4859 | return This::STATUS_PCREL_UNALIGNED; | |
4860 | ||
4861 | return check_overflow<21>(x); | |
4862 | } | |
4863 | ||
4864 | // R_MIPS_PCHI16 | |
4865 | static inline typename This::Status | |
4866 | relpchi16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4867 | const Symbol_value<size>* psymval, Mips_address addend, | |
4868 | Mips_address address, unsigned int r_sym, bool extract_addend) | |
4869 | { | |
4870 | // Record the relocation. It will be resolved when we find pclo16 part. | |
4871 | pchi16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval, | |
4872 | addend, 0, r_sym, extract_addend, address)); | |
4873 | return This::STATUS_OKAY; | |
4874 | } | |
4875 | ||
4876 | // R_MIPS_PCHI16 | |
4877 | static inline typename This::Status | |
4878 | do_relpchi16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4879 | const Symbol_value<size>* psymval, Mips_address addend_hi, | |
4880 | Mips_address address, bool extract_addend, Valtype32 addend_lo, | |
4881 | bool calculate_only, Valtype* calculated_value) | |
4882 | { | |
4883 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
4884 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4885 | ||
4886 | Valtype addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo | |
4887 | : addend_hi); | |
4888 | ||
4889 | Valtype value = psymval->value(object, addend) - address; | |
4890 | Valtype x = ((value + 0x8000) >> 16) & 0xffff; | |
4891 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
4892 | ||
4893 | if (calculate_only) | |
4894 | *calculated_value = x; | |
4895 | else | |
4896 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4897 | ||
4898 | return This::STATUS_OKAY; | |
4899 | } | |
4900 | ||
4901 | // R_MIPS_PCLO16 | |
4902 | static inline typename This::Status | |
4903 | relpclo16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
4904 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
4905 | bool extract_addend, Mips_address address, unsigned int r_sym, | |
4906 | unsigned int rel_type, bool calculate_only, | |
4907 | Valtype* calculated_value) | |
4908 | { | |
4909 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
4910 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4911 | ||
4912 | Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff) | |
4913 | : addend_a); | |
4914 | ||
4915 | if (rel_type == elfcpp::SHT_REL) | |
4916 | { | |
4917 | // Resolve pending R_MIPS_PCHI16 relocations. | |
4918 | typename std::list<reloc_high<size, big_endian> >::iterator it = | |
4919 | pchi16_relocs.begin(); | |
4920 | while (it != pchi16_relocs.end()) | |
4921 | { | |
4922 | reloc_high<size, big_endian> pchi16 = *it; | |
4923 | if (pchi16.r_sym == r_sym) | |
4924 | { | |
4925 | do_relpchi16(pchi16.view, pchi16.object, pchi16.psymval, | |
4926 | pchi16.addend, pchi16.address, | |
4927 | pchi16.extract_addend, addend, calculate_only, | |
4928 | calculated_value); | |
4929 | it = pchi16_relocs.erase(it); | |
4930 | } | |
4931 | else | |
4932 | ++it; | |
4933 | } | |
4934 | } | |
4935 | ||
4936 | // Resolve R_MIPS_PCLO16 relocation. | |
4937 | Valtype x = psymval->value(object, addend) - address; | |
4938 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
4939 | ||
4940 | if (calculate_only) | |
4941 | *calculated_value = x; | |
4942 | else | |
4943 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4944 | ||
4945 | return This::STATUS_OKAY; | |
4946 | } | |
4947 | ||
9810d34d SS |
4948 | // R_MICROMIPS_PC7_S1 |
4949 | static inline typename This::Status | |
4950 | relmicromips_pc7_s1(unsigned char* view, | |
4951 | const Mips_relobj<size, big_endian>* object, | |
4952 | const Symbol_value<size>* psymval, Mips_address address, | |
4953 | Mips_address addend_a, bool extract_addend, | |
47a9f4fc | 4954 | bool calculate_only, Valtype* calculated_value) |
9810d34d | 4955 | { |
9810d34d SS |
4956 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4957 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4958 | ||
47a9f4fc VR |
4959 | Valtype addend = extract_addend ? Bits<8>::sign_extend32((val & 0x7f) << 1) |
4960 | : addend_a; | |
9810d34d | 4961 | |
47a9f4fc | 4962 | Valtype x = psymval->value(object, addend) - address; |
9810d34d | 4963 | val = Bits<16>::bit_select32(val, x >> 1, 0x7f); |
47a9f4fc VR |
4964 | |
4965 | if (calculate_only) | |
4966 | { | |
4967 | *calculated_value = x >> 1; | |
4968 | return This::STATUS_OKAY; | |
4969 | } | |
4970 | else | |
4971 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
4972 | ||
4973 | return check_overflow<8>(x); | |
9810d34d SS |
4974 | } |
4975 | ||
4976 | // R_MICROMIPS_PC10_S1 | |
4977 | static inline typename This::Status | |
4978 | relmicromips_pc10_s1(unsigned char* view, | |
4979 | const Mips_relobj<size, big_endian>* object, | |
4980 | const Symbol_value<size>* psymval, Mips_address address, | |
4981 | Mips_address addend_a, bool extract_addend, | |
47a9f4fc | 4982 | bool calculate_only, Valtype* calculated_value) |
9810d34d | 4983 | { |
9810d34d SS |
4984 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
4985 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
4986 | ||
47a9f4fc VR |
4987 | Valtype addend = (extract_addend |
4988 | ? Bits<11>::sign_extend32((val & 0x3ff) << 1) | |
4989 | : addend_a); | |
9810d34d | 4990 | |
47a9f4fc | 4991 | Valtype x = psymval->value(object, addend) - address; |
9810d34d | 4992 | val = Bits<16>::bit_select32(val, x >> 1, 0x3ff); |
47a9f4fc VR |
4993 | |
4994 | if (calculate_only) | |
4995 | { | |
4996 | *calculated_value = x >> 1; | |
4997 | return This::STATUS_OKAY; | |
4998 | } | |
4999 | else | |
5000 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5001 | ||
5002 | return check_overflow<11>(x); | |
9810d34d SS |
5003 | } |
5004 | ||
5005 | // R_MICROMIPS_PC16_S1 | |
5006 | static inline typename This::Status | |
5007 | relmicromips_pc16_s1(unsigned char* view, | |
5008 | const Mips_relobj<size, big_endian>* object, | |
5009 | const Symbol_value<size>* psymval, Mips_address address, | |
5010 | Mips_address addend_a, bool extract_addend, | |
47a9f4fc | 5011 | bool calculate_only, Valtype* calculated_value) |
9810d34d | 5012 | { |
9810d34d SS |
5013 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5014 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
5015 | ||
47a9f4fc VR |
5016 | Valtype addend = (extract_addend |
5017 | ? Bits<17>::sign_extend32((val & 0xffff) << 1) | |
5018 | : addend_a); | |
9810d34d | 5019 | |
47a9f4fc | 5020 | Valtype x = psymval->value(object, addend) - address; |
9810d34d | 5021 | val = Bits<16>::bit_select32(val, x >> 1, 0xffff); |
47a9f4fc VR |
5022 | |
5023 | if (calculate_only) | |
5024 | { | |
5025 | *calculated_value = x >> 1; | |
5026 | return This::STATUS_OKAY; | |
5027 | } | |
5028 | else | |
5029 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5030 | ||
5031 | return check_overflow<17>(x); | |
9810d34d SS |
5032 | } |
5033 | ||
5034 | // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16, | |
5035 | static inline typename This::Status | |
5036 | relhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5037 | const Symbol_value<size>* psymval, Mips_address addend, | |
5038 | Mips_address address, bool gp_disp, unsigned int r_type, | |
3d0064a9 | 5039 | unsigned int r_sym, bool extract_addend) |
9810d34d SS |
5040 | { |
5041 | // Record the relocation. It will be resolved when we find lo16 part. | |
5042 | hi16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval, | |
3d0064a9 CC |
5043 | addend, r_type, r_sym, extract_addend, address, |
5044 | gp_disp)); | |
9810d34d SS |
5045 | return This::STATUS_OKAY; |
5046 | } | |
5047 | ||
5048 | // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16, | |
5049 | static inline typename This::Status | |
5050 | do_relhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5051 | const Symbol_value<size>* psymval, Mips_address addend_hi, | |
5052 | Mips_address address, bool is_gp_disp, unsigned int r_type, | |
5053 | bool extract_addend, Valtype32 addend_lo, | |
47a9f4fc VR |
5054 | Target_mips<size, big_endian>* target, bool calculate_only, |
5055 | Valtype* calculated_value) | |
9810d34d | 5056 | { |
9810d34d SS |
5057 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5058 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
5059 | ||
47a9f4fc | 5060 | Valtype addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo |
9810d34d SS |
5061 | : addend_hi); |
5062 | ||
5063 | Valtype32 value; | |
5064 | if (!is_gp_disp) | |
5065 | value = psymval->value(object, addend); | |
5066 | else | |
5067 | { | |
5068 | // For MIPS16 ABI code we generate this sequence | |
5069 | // 0: li $v0,%hi(_gp_disp) | |
5070 | // 4: addiupc $v1,%lo(_gp_disp) | |
5071 | // 8: sll $v0,16 | |
5072 | // 12: addu $v0,$v1 | |
5073 | // 14: move $gp,$v0 | |
5074 | // So the offsets of hi and lo relocs are the same, but the | |
5075 | // base $pc is that used by the ADDIUPC instruction at $t9 + 4. | |
5076 | // ADDIUPC clears the low two bits of the instruction address, | |
5077 | // so the base is ($t9 + 4) & ~3. | |
5078 | Valtype32 gp_disp; | |
5079 | if (r_type == elfcpp::R_MIPS16_HI16) | |
5080 | gp_disp = (target->adjusted_gp_value(object) | |
5081 | - ((address + 4) & ~0x3)); | |
5082 | // The microMIPS .cpload sequence uses the same assembly | |
5083 | // instructions as the traditional psABI version, but the | |
5084 | // incoming $t9 has the low bit set. | |
5085 | else if (r_type == elfcpp::R_MICROMIPS_HI16) | |
5086 | gp_disp = target->adjusted_gp_value(object) - address - 1; | |
5087 | else | |
5088 | gp_disp = target->adjusted_gp_value(object) - address; | |
5089 | value = gp_disp + addend; | |
5090 | } | |
47a9f4fc | 5091 | Valtype x = ((value + 0x8000) >> 16) & 0xffff; |
9810d34d | 5092 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5093 | |
5094 | if (calculate_only) | |
5095 | { | |
5096 | *calculated_value = x; | |
5097 | return This::STATUS_OKAY; | |
5098 | } | |
5099 | else | |
5100 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5101 | ||
5102 | return (is_gp_disp ? check_overflow<16>(x) | |
5103 | : This::STATUS_OKAY); | |
9810d34d SS |
5104 | } |
5105 | ||
5106 | // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16 | |
5107 | static inline typename This::Status | |
5108 | relgot16_local(unsigned char* view, | |
5109 | const Mips_relobj<size, big_endian>* object, | |
5110 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
3d0064a9 | 5111 | bool extract_addend, unsigned int r_type, unsigned int r_sym) |
9810d34d SS |
5112 | { |
5113 | // Record the relocation. It will be resolved when we find lo16 part. | |
5114 | got16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval, | |
3d0064a9 | 5115 | addend_a, r_type, r_sym, extract_addend)); |
9810d34d SS |
5116 | return This::STATUS_OKAY; |
5117 | } | |
5118 | ||
5119 | // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16 | |
5120 | static inline typename This::Status | |
5121 | do_relgot16_local(unsigned char* view, | |
5122 | const Mips_relobj<size, big_endian>* object, | |
5123 | const Symbol_value<size>* psymval, Mips_address addend_hi, | |
47a9f4fc VR |
5124 | bool extract_addend, Valtype32 addend_lo, |
5125 | Target_mips<size, big_endian>* target, bool calculate_only, | |
5126 | Valtype* calculated_value) | |
9810d34d | 5127 | { |
9810d34d SS |
5128 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5129 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
5130 | ||
47a9f4fc | 5131 | Valtype addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo |
9810d34d SS |
5132 | : addend_hi); |
5133 | ||
5134 | // Find GOT page entry. | |
5135 | Mips_address value = ((psymval->value(object, addend) + 0x8000) >> 16) | |
5136 | & 0xffff; | |
5137 | value <<= 16; | |
5138 | unsigned int got_offset = | |
5139 | target->got_section()->get_got_page_offset(value, object); | |
5140 | ||
5141 | // Resolve the relocation. | |
47a9f4fc | 5142 | Valtype x = target->got_section()->gp_offset(got_offset, object); |
9810d34d | 5143 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5144 | |
5145 | if (calculate_only) | |
5146 | { | |
5147 | *calculated_value = x; | |
5148 | return This::STATUS_OKAY; | |
5149 | } | |
5150 | else | |
5151 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5152 | ||
5153 | return check_overflow<16>(x); | |
9810d34d SS |
5154 | } |
5155 | ||
5156 | // R_MIPS_LO16, R_MIPS16_LO16, R_MICROMIPS_LO16, R_MICROMIPS_HI0_LO16 | |
5157 | static inline typename This::Status | |
5158 | rello16(Target_mips<size, big_endian>* target, unsigned char* view, | |
5159 | const Mips_relobj<size, big_endian>* object, | |
5160 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
5161 | bool extract_addend, Mips_address address, bool is_gp_disp, | |
47a9f4fc VR |
5162 | unsigned int r_type, unsigned int r_sym, unsigned int rel_type, |
5163 | bool calculate_only, Valtype* calculated_value) | |
9810d34d | 5164 | { |
9810d34d SS |
5165 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5166 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
5167 | ||
47a9f4fc VR |
5168 | Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff) |
5169 | : addend_a); | |
9810d34d | 5170 | |
47a9f4fc | 5171 | if (rel_type == elfcpp::SHT_REL) |
9810d34d | 5172 | { |
47a9f4fc VR |
5173 | typename This::Status reloc_status = This::STATUS_OKAY; |
5174 | // Resolve pending R_MIPS_HI16 relocations. | |
5175 | typename std::list<reloc_high<size, big_endian> >::iterator it = | |
5176 | hi16_relocs.begin(); | |
5177 | while (it != hi16_relocs.end()) | |
9810d34d | 5178 | { |
47a9f4fc VR |
5179 | reloc_high<size, big_endian> hi16 = *it; |
5180 | if (hi16.r_sym == r_sym | |
5181 | && is_matching_lo16_reloc(hi16.r_type, r_type)) | |
5182 | { | |
5183 | mips_reloc_unshuffle(hi16.view, hi16.r_type, false); | |
5184 | reloc_status = do_relhi16(hi16.view, hi16.object, hi16.psymval, | |
5185 | hi16.addend, hi16.address, hi16.gp_disp, | |
5186 | hi16.r_type, hi16.extract_addend, addend, | |
5187 | target, calculate_only, calculated_value); | |
5188 | mips_reloc_shuffle(hi16.view, hi16.r_type, false); | |
5189 | if (reloc_status == This::STATUS_OVERFLOW) | |
5190 | return This::STATUS_OVERFLOW; | |
5191 | it = hi16_relocs.erase(it); | |
5192 | } | |
5193 | else | |
5194 | ++it; | |
9810d34d | 5195 | } |
9810d34d | 5196 | |
47a9f4fc VR |
5197 | // Resolve pending local R_MIPS_GOT16 relocations. |
5198 | typename std::list<reloc_high<size, big_endian> >::iterator it2 = | |
5199 | got16_relocs.begin(); | |
5200 | while (it2 != got16_relocs.end()) | |
9810d34d | 5201 | { |
47a9f4fc VR |
5202 | reloc_high<size, big_endian> got16 = *it2; |
5203 | if (got16.r_sym == r_sym | |
5204 | && is_matching_lo16_reloc(got16.r_type, r_type)) | |
5205 | { | |
5206 | mips_reloc_unshuffle(got16.view, got16.r_type, false); | |
5207 | ||
5208 | reloc_status = do_relgot16_local(got16.view, got16.object, | |
5209 | got16.psymval, got16.addend, | |
5210 | got16.extract_addend, addend, target, | |
5211 | calculate_only, calculated_value); | |
5212 | ||
5213 | mips_reloc_shuffle(got16.view, got16.r_type, false); | |
5214 | if (reloc_status == This::STATUS_OVERFLOW) | |
5215 | return This::STATUS_OVERFLOW; | |
5216 | it2 = got16_relocs.erase(it2); | |
5217 | } | |
5218 | else | |
5219 | ++it2; | |
9810d34d | 5220 | } |
9810d34d SS |
5221 | } |
5222 | ||
5223 | // Resolve R_MIPS_LO16 relocation. | |
47a9f4fc | 5224 | Valtype x; |
9810d34d SS |
5225 | if (!is_gp_disp) |
5226 | x = psymval->value(object, addend); | |
5227 | else | |
5228 | { | |
5229 | // See the comment for R_MIPS16_HI16 above for the reason | |
5230 | // for this conditional. | |
5231 | Valtype32 gp_disp; | |
5232 | if (r_type == elfcpp::R_MIPS16_LO16) | |
5233 | gp_disp = target->adjusted_gp_value(object) - (address & ~0x3); | |
5234 | else if (r_type == elfcpp::R_MICROMIPS_LO16 | |
5235 | || r_type == elfcpp::R_MICROMIPS_HI0_LO16) | |
5236 | gp_disp = target->adjusted_gp_value(object) - address + 3; | |
5237 | else | |
5238 | gp_disp = target->adjusted_gp_value(object) - address + 4; | |
5239 | // The MIPS ABI requires checking the R_MIPS_LO16 relocation | |
5240 | // for overflow. Relocations against _gp_disp are normally | |
5241 | // generated from the .cpload pseudo-op. It generates code | |
5242 | // that normally looks like this: | |
5243 | ||
5244 | // lui $gp,%hi(_gp_disp) | |
5245 | // addiu $gp,$gp,%lo(_gp_disp) | |
5246 | // addu $gp,$gp,$t9 | |
5247 | ||
5248 | // Here $t9 holds the address of the function being called, | |
5249 | // as required by the MIPS ELF ABI. The R_MIPS_LO16 | |
5250 | // relocation can easily overflow in this situation, but the | |
5251 | // R_MIPS_HI16 relocation will handle the overflow. | |
5252 | // Therefore, we consider this a bug in the MIPS ABI, and do | |
5253 | // not check for overflow here. | |
5254 | x = gp_disp + addend; | |
5255 | } | |
5256 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
47a9f4fc VR |
5257 | |
5258 | if (calculate_only) | |
5259 | *calculated_value = x; | |
5260 | else | |
5261 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5262 | ||
9810d34d SS |
5263 | return This::STATUS_OKAY; |
5264 | } | |
5265 | ||
5266 | // R_MIPS_CALL16, R_MIPS16_CALL16, R_MICROMIPS_CALL16 | |
5267 | // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16 | |
5268 | // R_MIPS_TLS_GD, R_MIPS16_TLS_GD, R_MICROMIPS_TLS_GD | |
5269 | // R_MIPS_TLS_GOTTPREL, R_MIPS16_TLS_GOTTPREL, R_MICROMIPS_TLS_GOTTPREL | |
5270 | // R_MIPS_TLS_LDM, R_MIPS16_TLS_LDM, R_MICROMIPS_TLS_LDM | |
5271 | // R_MIPS_GOT_DISP, R_MICROMIPS_GOT_DISP | |
5272 | static inline typename This::Status | |
47a9f4fc VR |
5273 | relgot(unsigned char* view, int gp_offset, bool calculate_only, |
5274 | Valtype* calculated_value) | |
9810d34d | 5275 | { |
9810d34d SS |
5276 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5277 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5278 | Valtype x = gp_offset; |
9810d34d | 5279 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5280 | |
5281 | if (calculate_only) | |
5282 | { | |
5283 | *calculated_value = x; | |
5284 | return This::STATUS_OKAY; | |
5285 | } | |
5286 | else | |
5287 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5288 | ||
5289 | return check_overflow<16>(x); | |
5290 | } | |
5291 | ||
5292 | // R_MIPS_EH | |
5293 | static inline typename This::Status | |
5294 | releh(unsigned char* view, int gp_offset, bool calculate_only, | |
5295 | Valtype* calculated_value) | |
5296 | { | |
5297 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
5298 | Valtype x = gp_offset; | |
5299 | ||
5300 | if (calculate_only) | |
5301 | { | |
5302 | *calculated_value = x; | |
5303 | return This::STATUS_OKAY; | |
5304 | } | |
5305 | else | |
5306 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
5307 | ||
5308 | return check_overflow<32>(x); | |
9810d34d SS |
5309 | } |
5310 | ||
5311 | // R_MIPS_GOT_PAGE, R_MICROMIPS_GOT_PAGE | |
5312 | static inline typename This::Status | |
5313 | relgotpage(Target_mips<size, big_endian>* target, unsigned char* view, | |
5314 | const Mips_relobj<size, big_endian>* object, | |
5315 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc VR |
5316 | bool extract_addend, bool calculate_only, |
5317 | Valtype* calculated_value) | |
9810d34d | 5318 | { |
9810d34d SS |
5319 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5320 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
47a9f4fc | 5321 | Valtype addend = extract_addend ? val & 0xffff : addend_a; |
9810d34d SS |
5322 | |
5323 | // Find a GOT page entry that points to within 32KB of symbol + addend. | |
5324 | Mips_address value = (psymval->value(object, addend) + 0x8000) & ~0xffff; | |
5325 | unsigned int got_offset = | |
5326 | target->got_section()->get_got_page_offset(value, object); | |
5327 | ||
47a9f4fc | 5328 | Valtype x = target->got_section()->gp_offset(got_offset, object); |
9810d34d | 5329 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5330 | |
5331 | if (calculate_only) | |
5332 | { | |
5333 | *calculated_value = x; | |
5334 | return This::STATUS_OKAY; | |
5335 | } | |
5336 | else | |
5337 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5338 | ||
5339 | return check_overflow<16>(x); | |
9810d34d SS |
5340 | } |
5341 | ||
5342 | // R_MIPS_GOT_OFST, R_MICROMIPS_GOT_OFST | |
5343 | static inline typename This::Status | |
5344 | relgotofst(Target_mips<size, big_endian>* target, unsigned char* view, | |
5345 | const Mips_relobj<size, big_endian>* object, | |
5346 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc VR |
5347 | bool extract_addend, bool local, bool calculate_only, |
5348 | Valtype* calculated_value) | |
9810d34d | 5349 | { |
9810d34d SS |
5350 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5351 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
47a9f4fc | 5352 | Valtype addend = extract_addend ? val & 0xffff : addend_a; |
9810d34d SS |
5353 | |
5354 | // For a local symbol, find a GOT page entry that points to within 32KB of | |
5355 | // symbol + addend. Relocation value is the offset of the GOT page entry's | |
5356 | // value from symbol + addend. | |
5357 | // For a global symbol, relocation value is addend. | |
47a9f4fc | 5358 | Valtype x; |
9810d34d SS |
5359 | if (local) |
5360 | { | |
5361 | // Find GOT page entry. | |
5362 | Mips_address value = ((psymval->value(object, addend) + 0x8000) | |
5363 | & ~0xffff); | |
5364 | target->got_section()->get_got_page_offset(value, object); | |
5365 | ||
5366 | x = psymval->value(object, addend) - value; | |
5367 | } | |
5368 | else | |
5369 | x = addend; | |
5370 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
47a9f4fc VR |
5371 | |
5372 | if (calculate_only) | |
5373 | { | |
5374 | *calculated_value = x; | |
5375 | return This::STATUS_OKAY; | |
5376 | } | |
5377 | else | |
5378 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5379 | ||
5380 | return check_overflow<16>(x); | |
9810d34d SS |
5381 | } |
5382 | ||
5383 | // R_MIPS_GOT_HI16, R_MIPS_CALL_HI16, | |
5384 | // R_MICROMIPS_GOT_HI16, R_MICROMIPS_CALL_HI16 | |
5385 | static inline typename This::Status | |
47a9f4fc VR |
5386 | relgot_hi16(unsigned char* view, int gp_offset, bool calculate_only, |
5387 | Valtype* calculated_value) | |
9810d34d | 5388 | { |
9810d34d SS |
5389 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5390 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5391 | Valtype x = gp_offset; |
9810d34d SS |
5392 | x = ((x + 0x8000) >> 16) & 0xffff; |
5393 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
47a9f4fc VR |
5394 | |
5395 | if (calculate_only) | |
5396 | *calculated_value = x; | |
5397 | else | |
5398 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5399 | ||
9810d34d SS |
5400 | return This::STATUS_OKAY; |
5401 | } | |
5402 | ||
5403 | // R_MIPS_GOT_LO16, R_MIPS_CALL_LO16, | |
5404 | // R_MICROMIPS_GOT_LO16, R_MICROMIPS_CALL_LO16 | |
5405 | static inline typename This::Status | |
47a9f4fc VR |
5406 | relgot_lo16(unsigned char* view, int gp_offset, bool calculate_only, |
5407 | Valtype* calculated_value) | |
9810d34d | 5408 | { |
9810d34d SS |
5409 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5410 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5411 | Valtype x = gp_offset; |
9810d34d | 5412 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5413 | |
5414 | if (calculate_only) | |
5415 | *calculated_value = x; | |
5416 | else | |
5417 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5418 | ||
9810d34d SS |
5419 | return This::STATUS_OKAY; |
5420 | } | |
5421 | ||
5422 | // R_MIPS_GPREL16, R_MIPS16_GPREL, R_MIPS_LITERAL, R_MICROMIPS_LITERAL | |
5423 | // R_MICROMIPS_GPREL7_S2, R_MICROMIPS_GPREL16 | |
5424 | static inline typename This::Status | |
5425 | relgprel(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5426 | const Symbol_value<size>* psymval, Mips_address gp, | |
5427 | Mips_address addend_a, bool extract_addend, bool local, | |
47a9f4fc VR |
5428 | unsigned int r_type, bool calculate_only, |
5429 | Valtype* calculated_value) | |
9810d34d | 5430 | { |
9810d34d SS |
5431 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5432 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
5433 | ||
47a9f4fc | 5434 | Valtype addend; |
9810d34d SS |
5435 | if (extract_addend) |
5436 | { | |
5437 | if (r_type == elfcpp::R_MICROMIPS_GPREL7_S2) | |
5438 | addend = (val & 0x7f) << 2; | |
5439 | else | |
5440 | addend = val & 0xffff; | |
5441 | // Only sign-extend the addend if it was extracted from the | |
5442 | // instruction. If the addend was separate, leave it alone, | |
5443 | // otherwise we may lose significant bits. | |
5444 | addend = Bits<16>::sign_extend32(addend); | |
5445 | } | |
5446 | else | |
5447 | addend = addend_a; | |
5448 | ||
47a9f4fc | 5449 | Valtype x = psymval->value(object, addend) - gp; |
9810d34d SS |
5450 | |
5451 | // If the symbol was local, any earlier relocatable links will | |
5452 | // have adjusted its addend with the gp offset, so compensate | |
5453 | // for that now. Don't do it for symbols forced local in this | |
5454 | // link, though, since they won't have had the gp offset applied | |
5455 | // to them before. | |
5456 | if (local) | |
5457 | x += object->gp_value(); | |
5458 | ||
5459 | if (r_type == elfcpp::R_MICROMIPS_GPREL7_S2) | |
5460 | val = Bits<32>::bit_select32(val, x, 0x7f); | |
5461 | else | |
5462 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
47a9f4fc VR |
5463 | |
5464 | if (calculate_only) | |
5465 | { | |
5466 | *calculated_value = x; | |
5467 | return This::STATUS_OKAY; | |
5468 | } | |
5469 | else | |
5470 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5471 | ||
5472 | if (check_overflow<16>(x) == This::STATUS_OVERFLOW) | |
9810d34d SS |
5473 | { |
5474 | gold_error(_("small-data section exceeds 64KB; lower small-data size " | |
5475 | "limit (see option -G)")); | |
5476 | return This::STATUS_OVERFLOW; | |
5477 | } | |
5478 | return This::STATUS_OKAY; | |
5479 | } | |
5480 | ||
5481 | // R_MIPS_GPREL32 | |
5482 | static inline typename This::Status | |
5483 | relgprel32(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5484 | const Symbol_value<size>* psymval, Mips_address gp, | |
47a9f4fc VR |
5485 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
5486 | Valtype* calculated_value) | |
9810d34d | 5487 | { |
9810d34d SS |
5488 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5489 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5490 | Valtype addend = extract_addend ? val : addend_a; |
9810d34d SS |
5491 | |
5492 | // R_MIPS_GPREL32 relocations are defined for local symbols only. | |
47a9f4fc VR |
5493 | Valtype x = psymval->value(object, addend) + object->gp_value() - gp; |
5494 | ||
5495 | if (calculate_only) | |
5496 | *calculated_value = x; | |
5497 | else | |
5498 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
5499 | ||
9810d34d SS |
5500 | return This::STATUS_OKAY; |
5501 | } | |
5502 | ||
5503 | // R_MIPS_TLS_TPREL_HI16, R_MIPS16_TLS_TPREL_HI16, R_MICROMIPS_TLS_TPREL_HI16 | |
5504 | // R_MIPS_TLS_DTPREL_HI16, R_MIPS16_TLS_DTPREL_HI16, | |
5505 | // R_MICROMIPS_TLS_DTPREL_HI16 | |
5506 | static inline typename This::Status | |
5507 | tlsrelhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5508 | const Symbol_value<size>* psymval, Valtype32 tp_offset, | |
47a9f4fc VR |
5509 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
5510 | Valtype* calculated_value) | |
9810d34d | 5511 | { |
9810d34d SS |
5512 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5513 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5514 | Valtype addend = extract_addend ? val & 0xffff : addend_a; |
9810d34d SS |
5515 | |
5516 | // tls symbol values are relative to tls_segment()->vaddr() | |
47a9f4fc | 5517 | Valtype x = ((psymval->value(object, addend) - tp_offset) + 0x8000) >> 16; |
9810d34d | 5518 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5519 | |
5520 | if (calculate_only) | |
5521 | *calculated_value = x; | |
5522 | else | |
5523 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5524 | ||
9810d34d SS |
5525 | return This::STATUS_OKAY; |
5526 | } | |
5527 | ||
5528 | // R_MIPS_TLS_TPREL_LO16, R_MIPS16_TLS_TPREL_LO16, R_MICROMIPS_TLS_TPREL_LO16, | |
5529 | // R_MIPS_TLS_DTPREL_LO16, R_MIPS16_TLS_DTPREL_LO16, | |
5530 | // R_MICROMIPS_TLS_DTPREL_LO16, | |
5531 | static inline typename This::Status | |
5532 | tlsrello16(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5533 | const Symbol_value<size>* psymval, Valtype32 tp_offset, | |
47a9f4fc VR |
5534 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
5535 | Valtype* calculated_value) | |
9810d34d | 5536 | { |
9810d34d SS |
5537 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5538 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5539 | Valtype addend = extract_addend ? val & 0xffff : addend_a; |
9810d34d SS |
5540 | |
5541 | // tls symbol values are relative to tls_segment()->vaddr() | |
47a9f4fc | 5542 | Valtype x = psymval->value(object, addend) - tp_offset; |
9810d34d | 5543 | val = Bits<32>::bit_select32(val, x, 0xffff); |
47a9f4fc VR |
5544 | |
5545 | if (calculate_only) | |
5546 | *calculated_value = x; | |
5547 | else | |
5548 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5549 | ||
9810d34d SS |
5550 | return This::STATUS_OKAY; |
5551 | } | |
5552 | ||
5553 | // R_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL64, | |
5554 | // R_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL64 | |
5555 | static inline typename This::Status | |
5556 | tlsrel32(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5557 | const Symbol_value<size>* psymval, Valtype32 tp_offset, | |
47a9f4fc VR |
5558 | Mips_address addend_a, bool extract_addend, bool calculate_only, |
5559 | Valtype* calculated_value) | |
9810d34d | 5560 | { |
9810d34d SS |
5561 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); |
5562 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
47a9f4fc | 5563 | Valtype addend = extract_addend ? val : addend_a; |
9810d34d SS |
5564 | |
5565 | // tls symbol values are relative to tls_segment()->vaddr() | |
47a9f4fc VR |
5566 | Valtype x = psymval->value(object, addend) - tp_offset; |
5567 | ||
5568 | if (calculate_only) | |
5569 | *calculated_value = x; | |
5570 | else | |
5571 | elfcpp::Swap<32, big_endian>::writeval(wv, x); | |
5572 | ||
9810d34d SS |
5573 | return This::STATUS_OKAY; |
5574 | } | |
5575 | ||
5576 | // R_MIPS_SUB, R_MICROMIPS_SUB | |
5577 | static inline typename This::Status | |
5578 | relsub(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5579 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
47a9f4fc | 5580 | bool extract_addend, bool calculate_only, Valtype* calculated_value) |
9810d34d | 5581 | { |
47a9f4fc VR |
5582 | Valtype64* wv = reinterpret_cast<Valtype64*>(view); |
5583 | Valtype64 addend = (extract_addend | |
5584 | ? elfcpp::Swap<64, big_endian>::readval(wv) | |
5585 | : addend_a); | |
5586 | ||
5587 | Valtype64 x = psymval->value(object, -addend); | |
5588 | if (calculate_only) | |
5589 | *calculated_value = x; | |
5590 | else | |
5591 | elfcpp::Swap<64, big_endian>::writeval(wv, x); | |
9810d34d | 5592 | |
9810d34d | 5593 | return This::STATUS_OKAY; |
47a9f4fc VR |
5594 | } |
5595 | ||
5596 | // R_MIPS_64: S + A | |
5597 | static inline typename This::Status | |
5598 | rel64(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5599 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
5600 | bool extract_addend, bool calculate_only, Valtype* calculated_value, | |
5601 | bool apply_addend_only) | |
5602 | { | |
5603 | Valtype64* wv = reinterpret_cast<Valtype64*>(view); | |
5604 | Valtype64 addend = (extract_addend | |
5605 | ? elfcpp::Swap<64, big_endian>::readval(wv) | |
5606 | : addend_a); | |
5607 | ||
5608 | Valtype64 x = psymval->value(object, addend); | |
5609 | if (calculate_only) | |
5610 | *calculated_value = x; | |
5611 | else | |
5612 | { | |
5613 | if (apply_addend_only) | |
5614 | x = addend; | |
5615 | elfcpp::Swap<64, big_endian>::writeval(wv, x); | |
5616 | } | |
5617 | ||
5618 | return This::STATUS_OKAY; | |
5619 | } | |
5620 | ||
e242ece1 VR |
5621 | // R_MIPS_HIGHER, R_MICROMIPS_HIGHER |
5622 | static inline typename This::Status | |
5623 | relhigher(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5624 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
5625 | bool extract_addend, bool calculate_only, Valtype* calculated_value) | |
5626 | { | |
5627 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
5628 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
5629 | Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff) | |
5630 | : addend_a); | |
5631 | ||
5632 | Valtype x = psymval->value(object, addend); | |
5633 | x = ((x + (uint64_t) 0x80008000) >> 32) & 0xffff; | |
5634 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
5635 | ||
5636 | if (calculate_only) | |
5637 | *calculated_value = x; | |
5638 | else | |
5639 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5640 | ||
5641 | return This::STATUS_OKAY; | |
5642 | } | |
5643 | ||
5644 | // R_MIPS_HIGHEST, R_MICROMIPS_HIGHEST | |
5645 | static inline typename This::Status | |
5646 | relhighest(unsigned char* view, const Mips_relobj<size, big_endian>* object, | |
5647 | const Symbol_value<size>* psymval, Mips_address addend_a, | |
5648 | bool extract_addend, bool calculate_only, | |
5649 | Valtype* calculated_value) | |
5650 | { | |
5651 | Valtype32* wv = reinterpret_cast<Valtype32*>(view); | |
5652 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv); | |
5653 | Valtype addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff) | |
5654 | : addend_a); | |
5655 | ||
5656 | Valtype x = psymval->value(object, addend); | |
5657 | x = ((x + (uint64_t) 0x800080008000) >> 48) & 0xffff; | |
5658 | val = Bits<32>::bit_select32(val, x, 0xffff); | |
5659 | ||
5660 | if (calculate_only) | |
5661 | *calculated_value = x; | |
5662 | else | |
5663 | elfcpp::Swap<32, big_endian>::writeval(wv, val); | |
5664 | ||
5665 | return This::STATUS_OKAY; | |
5666 | } | |
9810d34d SS |
5667 | }; |
5668 | ||
5669 | template<int size, bool big_endian> | |
5670 | typename std::list<reloc_high<size, big_endian> > | |
5671 | Mips_relocate_functions<size, big_endian>::hi16_relocs; | |
5672 | ||
5673 | template<int size, bool big_endian> | |
5674 | typename std::list<reloc_high<size, big_endian> > | |
5675 | Mips_relocate_functions<size, big_endian>::got16_relocs; | |
5676 | ||
f5b11759 VR |
5677 | template<int size, bool big_endian> |
5678 | typename std::list<reloc_high<size, big_endian> > | |
5679 | Mips_relocate_functions<size, big_endian>::pchi16_relocs; | |
5680 | ||
9810d34d SS |
5681 | // Mips_got_info methods. |
5682 | ||
5683 | // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol | |
5684 | // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT. | |
5685 | ||
5686 | template<int size, bool big_endian> | |
5687 | void | |
5688 | Mips_got_info<size, big_endian>::record_local_got_symbol( | |
5689 | Mips_relobj<size, big_endian>* object, unsigned int symndx, | |
47a9f4fc VR |
5690 | Mips_address addend, unsigned int r_type, unsigned int shndx, |
5691 | bool is_section_symbol) | |
9810d34d SS |
5692 | { |
5693 | Mips_got_entry<size, big_endian>* entry = | |
5694 | new Mips_got_entry<size, big_endian>(object, symndx, addend, | |
5695 | mips_elf_reloc_tls_type(r_type), | |
47a9f4fc | 5696 | shndx, is_section_symbol); |
9810d34d SS |
5697 | this->record_got_entry(entry, object); |
5698 | } | |
5699 | ||
5700 | // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM, | |
5701 | // in OBJECT. FOR_CALL is true if the caller is only interested in | |
5702 | // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic | |
5703 | // relocation. | |
5704 | ||
5705 | template<int size, bool big_endian> | |
5706 | void | |
5707 | Mips_got_info<size, big_endian>::record_global_got_symbol( | |
5708 | Mips_symbol<size>* mips_sym, Mips_relobj<size, big_endian>* object, | |
5709 | unsigned int r_type, bool dyn_reloc, bool for_call) | |
5710 | { | |
5711 | if (!for_call) | |
5712 | mips_sym->set_got_not_only_for_calls(); | |
5713 | ||
5714 | // A global symbol in the GOT must also be in the dynamic symbol table. | |
c1f59f8f | 5715 | if (!mips_sym->needs_dynsym_entry() && !mips_sym->is_forced_local()) |
9810d34d SS |
5716 | { |
5717 | switch (mips_sym->visibility()) | |
5718 | { | |
5719 | case elfcpp::STV_INTERNAL: | |
5720 | case elfcpp::STV_HIDDEN: | |
5721 | mips_sym->set_is_forced_local(); | |
5722 | break; | |
5723 | default: | |
5724 | mips_sym->set_needs_dynsym_entry(); | |
5725 | break; | |
5726 | } | |
5727 | } | |
5728 | ||
5729 | unsigned char tls_type = mips_elf_reloc_tls_type(r_type); | |
5730 | if (tls_type == GOT_TLS_NONE) | |
5731 | this->global_got_symbols_.insert(mips_sym); | |
5732 | ||
5733 | if (dyn_reloc) | |
5734 | { | |
5735 | if (mips_sym->global_got_area() == GGA_NONE) | |
5736 | mips_sym->set_global_got_area(GGA_RELOC_ONLY); | |
5737 | return; | |
5738 | } | |
5739 | ||
5740 | Mips_got_entry<size, big_endian>* entry = | |
15eb1beb | 5741 | new Mips_got_entry<size, big_endian>(mips_sym, tls_type); |
9810d34d SS |
5742 | |
5743 | this->record_got_entry(entry, object); | |
5744 | } | |
5745 | ||
5746 | // Add ENTRY to master GOT and to OBJECT's GOT. | |
5747 | ||
5748 | template<int size, bool big_endian> | |
5749 | void | |
5750 | Mips_got_info<size, big_endian>::record_got_entry( | |
5751 | Mips_got_entry<size, big_endian>* entry, | |
5752 | Mips_relobj<size, big_endian>* object) | |
5753 | { | |
15eb1beb | 5754 | this->got_entries_.insert(entry); |
9810d34d SS |
5755 | |
5756 | // Create the GOT entry for the OBJECT's GOT. | |
5757 | Mips_got_info<size, big_endian>* g = object->get_or_create_got_info(); | |
5758 | Mips_got_entry<size, big_endian>* entry2 = | |
5759 | new Mips_got_entry<size, big_endian>(*entry); | |
5760 | ||
15eb1beb | 5761 | g->got_entries_.insert(entry2); |
9810d34d SS |
5762 | } |
5763 | ||
5764 | // Record that OBJECT has a page relocation against symbol SYMNDX and | |
5765 | // that ADDEND is the addend for that relocation. | |
5766 | // This function creates an upper bound on the number of GOT slots | |
5767 | // required; no attempt is made to combine references to non-overridable | |
5768 | // global symbols across multiple input files. | |
5769 | ||
5770 | template<int size, bool big_endian> | |
5771 | void | |
5772 | Mips_got_info<size, big_endian>::record_got_page_entry( | |
5773 | Mips_relobj<size, big_endian>* object, unsigned int symndx, int addend) | |
5774 | { | |
5775 | struct Got_page_range **range_ptr, *range; | |
5776 | int old_pages, new_pages; | |
5777 | ||
5778 | // Find the Got_page_entry for this symbol. | |
5779 | Got_page_entry* entry = new Got_page_entry(object, symndx); | |
5780 | typename Got_page_entry_set::iterator it = | |
5781 | this->got_page_entries_.find(entry); | |
5782 | if (it != this->got_page_entries_.end()) | |
5783 | entry = *it; | |
5784 | else | |
5785 | this->got_page_entries_.insert(entry); | |
5786 | ||
5787 | // Add the same entry to the OBJECT's GOT. | |
5788 | Got_page_entry* entry2 = NULL; | |
5789 | Mips_got_info<size, big_endian>* g2 = object->get_or_create_got_info(); | |
5790 | if (g2->got_page_entries_.find(entry) == g2->got_page_entries_.end()) | |
5791 | { | |
5792 | entry2 = new Got_page_entry(*entry); | |
5793 | g2->got_page_entries_.insert(entry2); | |
5794 | } | |
5795 | ||
5796 | // Skip over ranges whose maximum extent cannot share a page entry | |
5797 | // with ADDEND. | |
5798 | range_ptr = &entry->ranges; | |
5799 | while (*range_ptr && addend > (*range_ptr)->max_addend + 0xffff) | |
5800 | range_ptr = &(*range_ptr)->next; | |
5801 | ||
5802 | // If we scanned to the end of the list, or found a range whose | |
5803 | // minimum extent cannot share a page entry with ADDEND, create | |
5804 | // a new singleton range. | |
5805 | range = *range_ptr; | |
5806 | if (!range || addend < range->min_addend - 0xffff) | |
5807 | { | |
5808 | range = new Got_page_range(); | |
5809 | range->next = *range_ptr; | |
5810 | range->min_addend = addend; | |
5811 | range->max_addend = addend; | |
5812 | ||
5813 | *range_ptr = range; | |
5814 | ++entry->num_pages; | |
5815 | if (entry2 != NULL) | |
5816 | ++entry2->num_pages; | |
5817 | ++this->page_gotno_; | |
5818 | ++g2->page_gotno_; | |
5819 | return; | |
5820 | } | |
5821 | ||
5822 | // Remember how many pages the old range contributed. | |
5823 | old_pages = range->get_max_pages(); | |
5824 | ||
5825 | // Update the ranges. | |
5826 | if (addend < range->min_addend) | |
5827 | range->min_addend = addend; | |
5828 | else if (addend > range->max_addend) | |
5829 | { | |
5830 | if (range->next && addend >= range->next->min_addend - 0xffff) | |
5831 | { | |
5832 | old_pages += range->next->get_max_pages(); | |
5833 | range->max_addend = range->next->max_addend; | |
5834 | range->next = range->next->next; | |
5835 | } | |
5836 | else | |
5837 | range->max_addend = addend; | |
5838 | } | |
5839 | ||
5840 | // Record any change in the total estimate. | |
5841 | new_pages = range->get_max_pages(); | |
5842 | if (old_pages != new_pages) | |
5843 | { | |
5844 | entry->num_pages += new_pages - old_pages; | |
5845 | if (entry2 != NULL) | |
5846 | entry2->num_pages += new_pages - old_pages; | |
5847 | this->page_gotno_ += new_pages - old_pages; | |
5848 | g2->page_gotno_ += new_pages - old_pages; | |
5849 | } | |
5850 | } | |
5851 | ||
5852 | // Create all entries that should be in the local part of the GOT. | |
5853 | ||
5854 | template<int size, bool big_endian> | |
5855 | void | |
5856 | Mips_got_info<size, big_endian>::add_local_entries( | |
5857 | Target_mips<size, big_endian>* target, Layout* layout) | |
5858 | { | |
5859 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
5860 | // First two GOT entries are reserved. The first entry will be filled at | |
5861 | // runtime. The second entry will be used by some runtime loaders. | |
5862 | got->add_constant(0); | |
5863 | got->add_constant(target->mips_elf_gnu_got1_mask()); | |
5864 | ||
5865 | for (typename Got_entry_set::iterator | |
5866 | p = this->got_entries_.begin(); | |
5867 | p != this->got_entries_.end(); | |
5868 | ++p) | |
5869 | { | |
5870 | Mips_got_entry<size, big_endian>* entry = *p; | |
5871 | if (entry->is_for_local_symbol() && !entry->is_tls_entry()) | |
5872 | { | |
5873 | got->add_local(entry->object(), entry->symndx(), | |
47a9f4fc | 5874 | GOT_TYPE_STANDARD, entry->addend()); |
9810d34d | 5875 | unsigned int got_offset = entry->object()->local_got_offset( |
47a9f4fc | 5876 | entry->symndx(), GOT_TYPE_STANDARD, entry->addend()); |
9810d34d SS |
5877 | if (got->multi_got() && this->index_ > 0 |
5878 | && parameters->options().output_is_position_independent()) | |
47a9f4fc VR |
5879 | { |
5880 | if (!entry->is_section_symbol()) | |
5881 | target->rel_dyn_section(layout)->add_local(entry->object(), | |
5882 | entry->symndx(), elfcpp::R_MIPS_REL32, got, got_offset); | |
5883 | else | |
5884 | target->rel_dyn_section(layout)->add_symbolless_local_addend( | |
5885 | entry->object(), entry->symndx(), elfcpp::R_MIPS_REL32, | |
5886 | got, got_offset); | |
5887 | } | |
9810d34d SS |
5888 | } |
5889 | } | |
5890 | ||
5891 | this->add_page_entries(target, layout); | |
5892 | ||
5893 | // Add global entries that should be in the local area. | |
5894 | for (typename Got_entry_set::iterator | |
5895 | p = this->got_entries_.begin(); | |
5896 | p != this->got_entries_.end(); | |
5897 | ++p) | |
5898 | { | |
5899 | Mips_got_entry<size, big_endian>* entry = *p; | |
5900 | if (!entry->is_for_global_symbol()) | |
5901 | continue; | |
5902 | ||
5903 | Mips_symbol<size>* mips_sym = entry->sym(); | |
5904 | if (mips_sym->global_got_area() == GGA_NONE && !entry->is_tls_entry()) | |
5905 | { | |
5906 | unsigned int got_type; | |
5907 | if (!got->multi_got()) | |
5908 | got_type = GOT_TYPE_STANDARD; | |
5909 | else | |
5910 | got_type = GOT_TYPE_STANDARD_MULTIGOT + this->index_; | |
5911 | if (got->add_global(mips_sym, got_type)) | |
5912 | { | |
5913 | mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type)); | |
5914 | if (got->multi_got() && this->index_ > 0 | |
5915 | && parameters->options().output_is_position_independent()) | |
5916 | target->rel_dyn_section(layout)->add_symbolless_global_addend( | |
5917 | mips_sym, elfcpp::R_MIPS_REL32, got, | |
5918 | mips_sym->got_offset(got_type)); | |
5919 | } | |
5920 | } | |
5921 | } | |
5922 | } | |
5923 | ||
5924 | // Create GOT page entries. | |
5925 | ||
5926 | template<int size, bool big_endian> | |
5927 | void | |
5928 | Mips_got_info<size, big_endian>::add_page_entries( | |
5929 | Target_mips<size, big_endian>* target, Layout* layout) | |
5930 | { | |
5931 | if (this->page_gotno_ == 0) | |
5932 | return; | |
5933 | ||
5934 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
5935 | this->got_page_offset_start_ = got->add_constant(0); | |
5936 | if (got->multi_got() && this->index_ > 0 | |
5937 | && parameters->options().output_is_position_independent()) | |
5938 | target->rel_dyn_section(layout)->add_absolute(elfcpp::R_MIPS_REL32, got, | |
5939 | this->got_page_offset_start_); | |
5940 | int num_entries = this->page_gotno_; | |
5941 | unsigned int prev_offset = this->got_page_offset_start_; | |
5942 | while (--num_entries > 0) | |
5943 | { | |
5944 | unsigned int next_offset = got->add_constant(0); | |
5945 | if (got->multi_got() && this->index_ > 0 | |
5946 | && parameters->options().output_is_position_independent()) | |
5947 | target->rel_dyn_section(layout)->add_absolute(elfcpp::R_MIPS_REL32, got, | |
5948 | next_offset); | |
5949 | gold_assert(next_offset == prev_offset + size/8); | |
5950 | prev_offset = next_offset; | |
5951 | } | |
5952 | this->got_page_offset_next_ = this->got_page_offset_start_; | |
5953 | } | |
5954 | ||
5955 | // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY. | |
5956 | ||
5957 | template<int size, bool big_endian> | |
5958 | void | |
5959 | Mips_got_info<size, big_endian>::add_global_entries( | |
5960 | Target_mips<size, big_endian>* target, Layout* layout, | |
5961 | unsigned int non_reloc_only_global_gotno) | |
5962 | { | |
5963 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
5964 | // Add GGA_NORMAL entries. | |
5965 | unsigned int count = 0; | |
5966 | for (typename Got_entry_set::iterator | |
5967 | p = this->got_entries_.begin(); | |
5968 | p != this->got_entries_.end(); | |
5969 | ++p) | |
5970 | { | |
5971 | Mips_got_entry<size, big_endian>* entry = *p; | |
5972 | if (!entry->is_for_global_symbol()) | |
5973 | continue; | |
5974 | ||
5975 | Mips_symbol<size>* mips_sym = entry->sym(); | |
5976 | if (mips_sym->global_got_area() != GGA_NORMAL) | |
5977 | continue; | |
5978 | ||
5979 | unsigned int got_type; | |
5980 | if (!got->multi_got()) | |
5981 | got_type = GOT_TYPE_STANDARD; | |
5982 | else | |
5983 | // In multi-GOT links, global symbol can be in both primary and | |
5984 | // secondary GOT(s). By creating custom GOT type | |
5985 | // (GOT_TYPE_STANDARD_MULTIGOT + got_index) we ensure that symbol | |
5986 | // is added to secondary GOT(s). | |
5987 | got_type = GOT_TYPE_STANDARD_MULTIGOT + this->index_; | |
5988 | if (!got->add_global(mips_sym, got_type)) | |
5989 | continue; | |
5990 | ||
5991 | mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type)); | |
5992 | if (got->multi_got() && this->index_ == 0) | |
5993 | count++; | |
5994 | if (got->multi_got() && this->index_ > 0) | |
5995 | { | |
5996 | if (parameters->options().output_is_position_independent() | |
5997 | || (!parameters->doing_static_link() | |
5998 | && mips_sym->is_from_dynobj() && !mips_sym->is_undefined())) | |
5999 | { | |
6000 | target->rel_dyn_section(layout)->add_global( | |
6001 | mips_sym, elfcpp::R_MIPS_REL32, got, | |
6002 | mips_sym->got_offset(got_type)); | |
6003 | got->add_secondary_got_reloc(mips_sym->got_offset(got_type), | |
6004 | elfcpp::R_MIPS_REL32, mips_sym); | |
6005 | } | |
6006 | } | |
6007 | } | |
6008 | ||
6009 | if (!got->multi_got() || this->index_ == 0) | |
6010 | { | |
6011 | if (got->multi_got()) | |
6012 | { | |
6013 | // We need to allocate space in the primary GOT for GGA_NORMAL entries | |
6014 | // of secondary GOTs, to ensure that GOT offsets of GGA_RELOC_ONLY | |
6015 | // entries correspond to dynamic symbol indexes. | |
6016 | while (count < non_reloc_only_global_gotno) | |
6017 | { | |
6018 | got->add_constant(0); | |
6019 | ++count; | |
6020 | } | |
6021 | } | |
6022 | ||
6023 | // Add GGA_RELOC_ONLY entries. | |
6024 | got->add_reloc_only_entries(); | |
6025 | } | |
6026 | } | |
6027 | ||
6028 | // Create global GOT entries that should be in the GGA_RELOC_ONLY area. | |
6029 | ||
6030 | template<int size, bool big_endian> | |
6031 | void | |
6032 | Mips_got_info<size, big_endian>::add_reloc_only_entries( | |
6033 | Mips_output_data_got<size, big_endian>* got) | |
6034 | { | |
15eb1beb | 6035 | for (typename Global_got_entry_set::iterator |
9810d34d SS |
6036 | p = this->global_got_symbols_.begin(); |
6037 | p != this->global_got_symbols_.end(); | |
6038 | ++p) | |
6039 | { | |
6040 | Mips_symbol<size>* mips_sym = *p; | |
6041 | if (mips_sym->global_got_area() == GGA_RELOC_ONLY) | |
6042 | { | |
6043 | unsigned int got_type; | |
6044 | if (!got->multi_got()) | |
6045 | got_type = GOT_TYPE_STANDARD; | |
6046 | else | |
6047 | got_type = GOT_TYPE_STANDARD_MULTIGOT; | |
6048 | if (got->add_global(mips_sym, got_type)) | |
6049 | mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type)); | |
6050 | } | |
6051 | } | |
6052 | } | |
6053 | ||
6054 | // Create TLS GOT entries. | |
6055 | ||
6056 | template<int size, bool big_endian> | |
6057 | void | |
6058 | Mips_got_info<size, big_endian>::add_tls_entries( | |
6059 | Target_mips<size, big_endian>* target, Layout* layout) | |
6060 | { | |
6061 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
6062 | // Add local tls entries. | |
6063 | for (typename Got_entry_set::iterator | |
6064 | p = this->got_entries_.begin(); | |
6065 | p != this->got_entries_.end(); | |
6066 | ++p) | |
6067 | { | |
6068 | Mips_got_entry<size, big_endian>* entry = *p; | |
6069 | if (!entry->is_tls_entry() || !entry->is_for_local_symbol()) | |
6070 | continue; | |
6071 | ||
6072 | if (entry->tls_type() == GOT_TLS_GD) | |
6073 | { | |
6074 | unsigned int got_type = GOT_TYPE_TLS_PAIR; | |
6075 | unsigned int r_type1 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 | |
6076 | : elfcpp::R_MIPS_TLS_DTPMOD64); | |
6077 | unsigned int r_type2 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 | |
6078 | : elfcpp::R_MIPS_TLS_DTPREL64); | |
6079 | ||
6080 | if (!parameters->doing_static_link()) | |
6081 | { | |
6082 | got->add_local_pair_with_rel(entry->object(), entry->symndx(), | |
6083 | entry->shndx(), got_type, | |
6084 | target->rel_dyn_section(layout), | |
47a9f4fc | 6085 | r_type1, entry->addend()); |
9810d34d | 6086 | unsigned int got_offset = |
47a9f4fc VR |
6087 | entry->object()->local_got_offset(entry->symndx(), got_type, |
6088 | entry->addend()); | |
9810d34d SS |
6089 | got->add_static_reloc(got_offset + size/8, r_type2, |
6090 | entry->object(), entry->symndx()); | |
6091 | } | |
6092 | else | |
6093 | { | |
6094 | // We are doing a static link. Mark it as belong to module 1, | |
6095 | // the executable. | |
6096 | unsigned int got_offset = got->add_constant(1); | |
6097 | entry->object()->set_local_got_offset(entry->symndx(), got_type, | |
47a9f4fc VR |
6098 | got_offset, |
6099 | entry->addend()); | |
9810d34d SS |
6100 | got->add_constant(0); |
6101 | got->add_static_reloc(got_offset + size/8, r_type2, | |
6102 | entry->object(), entry->symndx()); | |
6103 | } | |
6104 | } | |
6105 | else if (entry->tls_type() == GOT_TLS_IE) | |
6106 | { | |
6107 | unsigned int got_type = GOT_TYPE_TLS_OFFSET; | |
6108 | unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 | |
6109 | : elfcpp::R_MIPS_TLS_TPREL64); | |
6110 | if (!parameters->doing_static_link()) | |
6111 | got->add_local_with_rel(entry->object(), entry->symndx(), got_type, | |
47a9f4fc VR |
6112 | target->rel_dyn_section(layout), r_type, |
6113 | entry->addend()); | |
9810d34d SS |
6114 | else |
6115 | { | |
47a9f4fc VR |
6116 | got->add_local(entry->object(), entry->symndx(), got_type, |
6117 | entry->addend()); | |
9810d34d | 6118 | unsigned int got_offset = |
47a9f4fc VR |
6119 | entry->object()->local_got_offset(entry->symndx(), got_type, |
6120 | entry->addend()); | |
9810d34d SS |
6121 | got->add_static_reloc(got_offset, r_type, entry->object(), |
6122 | entry->symndx()); | |
6123 | } | |
6124 | } | |
6125 | else if (entry->tls_type() == GOT_TLS_LDM) | |
6126 | { | |
6127 | unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 | |
6128 | : elfcpp::R_MIPS_TLS_DTPMOD64); | |
6129 | unsigned int got_offset; | |
6130 | if (!parameters->doing_static_link()) | |
6131 | { | |
6132 | got_offset = got->add_constant(0); | |
6133 | target->rel_dyn_section(layout)->add_local( | |
6134 | entry->object(), 0, r_type, got, got_offset); | |
6135 | } | |
6136 | else | |
6137 | // We are doing a static link. Just mark it as belong to module 1, | |
6138 | // the executable. | |
6139 | got_offset = got->add_constant(1); | |
6140 | ||
6141 | got->add_constant(0); | |
6142 | got->set_tls_ldm_offset(got_offset, entry->object()); | |
6143 | } | |
6144 | else | |
6145 | gold_unreachable(); | |
6146 | } | |
6147 | ||
6148 | // Add global tls entries. | |
6149 | for (typename Got_entry_set::iterator | |
6150 | p = this->got_entries_.begin(); | |
6151 | p != this->got_entries_.end(); | |
6152 | ++p) | |
6153 | { | |
6154 | Mips_got_entry<size, big_endian>* entry = *p; | |
6155 | if (!entry->is_tls_entry() || !entry->is_for_global_symbol()) | |
6156 | continue; | |
6157 | ||
6158 | Mips_symbol<size>* mips_sym = entry->sym(); | |
6159 | if (entry->tls_type() == GOT_TLS_GD) | |
6160 | { | |
6161 | unsigned int got_type; | |
6162 | if (!got->multi_got()) | |
6163 | got_type = GOT_TYPE_TLS_PAIR; | |
6164 | else | |
6165 | got_type = GOT_TYPE_TLS_PAIR_MULTIGOT + this->index_; | |
6166 | unsigned int r_type1 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32 | |
6167 | : elfcpp::R_MIPS_TLS_DTPMOD64); | |
6168 | unsigned int r_type2 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32 | |
6169 | : elfcpp::R_MIPS_TLS_DTPREL64); | |
6170 | if (!parameters->doing_static_link()) | |
6171 | got->add_global_pair_with_rel(mips_sym, got_type, | |
6172 | target->rel_dyn_section(layout), r_type1, r_type2); | |
6173 | else | |
6174 | { | |
6175 | // Add a GOT pair for for R_MIPS_TLS_GD. The creates a pair of | |
6176 | // GOT entries. The first one is initialized to be 1, which is the | |
6177 | // module index for the main executable and the second one 0. A | |
6178 | // reloc of the type R_MIPS_TLS_DTPREL32/64 will be created for | |
6179 | // the second GOT entry and will be applied by gold. | |
6180 | unsigned int got_offset = got->add_constant(1); | |
6181 | mips_sym->set_got_offset(got_type, got_offset); | |
6182 | got->add_constant(0); | |
6183 | got->add_static_reloc(got_offset + size/8, r_type2, mips_sym); | |
6184 | } | |
6185 | } | |
6186 | else if (entry->tls_type() == GOT_TLS_IE) | |
6187 | { | |
6188 | unsigned int got_type; | |
6189 | if (!got->multi_got()) | |
6190 | got_type = GOT_TYPE_TLS_OFFSET; | |
6191 | else | |
6192 | got_type = GOT_TYPE_TLS_OFFSET_MULTIGOT + this->index_; | |
6193 | unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_TPREL32 | |
6194 | : elfcpp::R_MIPS_TLS_TPREL64); | |
6195 | if (!parameters->doing_static_link()) | |
6196 | got->add_global_with_rel(mips_sym, got_type, | |
6197 | target->rel_dyn_section(layout), r_type); | |
6198 | else | |
6199 | { | |
6200 | got->add_global(mips_sym, got_type); | |
6201 | unsigned int got_offset = mips_sym->got_offset(got_type); | |
6202 | got->add_static_reloc(got_offset, r_type, mips_sym); | |
6203 | } | |
6204 | } | |
6205 | else | |
6206 | gold_unreachable(); | |
6207 | } | |
6208 | } | |
6209 | ||
6210 | // Decide whether the symbol needs an entry in the global part of the primary | |
6211 | // GOT, setting global_got_area accordingly. Count the number of global | |
6212 | // symbols that are in the primary GOT only because they have dynamic | |
6213 | // relocations R_MIPS_REL32 against them (reloc_only_gotno). | |
6214 | ||
6215 | template<int size, bool big_endian> | |
6216 | void | |
6217 | Mips_got_info<size, big_endian>::count_got_symbols(Symbol_table* symtab) | |
6218 | { | |
15eb1beb | 6219 | for (typename Global_got_entry_set::iterator |
9810d34d SS |
6220 | p = this->global_got_symbols_.begin(); |
6221 | p != this->global_got_symbols_.end(); | |
6222 | ++p) | |
6223 | { | |
6224 | Mips_symbol<size>* sym = *p; | |
6225 | // Make a final decision about whether the symbol belongs in the | |
6226 | // local or global GOT. Symbols that bind locally can (and in the | |
6227 | // case of forced-local symbols, must) live in the local GOT. | |
6228 | // Those that are aren't in the dynamic symbol table must also | |
6229 | // live in the local GOT. | |
6230 | ||
6231 | if (!sym->should_add_dynsym_entry(symtab) | |
6232 | || (sym->got_only_for_calls() | |
6233 | ? symbol_calls_local(sym, sym->should_add_dynsym_entry(symtab)) | |
6234 | : symbol_references_local(sym, | |
6235 | sym->should_add_dynsym_entry(symtab)))) | |
6236 | // The symbol belongs in the local GOT. We no longer need this | |
6237 | // entry if it was only used for relocations; those relocations | |
6238 | // will be against the null or section symbol instead. | |
6239 | sym->set_global_got_area(GGA_NONE); | |
6240 | else if (sym->global_got_area() == GGA_RELOC_ONLY) | |
6241 | { | |
6242 | ++this->reloc_only_gotno_; | |
6243 | ++this->global_gotno_ ; | |
6244 | } | |
6245 | } | |
6246 | } | |
6247 | ||
6248 | // Return the offset of GOT page entry for VALUE. Initialize the entry with | |
6249 | // VALUE if it is not initialized. | |
6250 | ||
6251 | template<int size, bool big_endian> | |
6252 | unsigned int | |
6253 | Mips_got_info<size, big_endian>::get_got_page_offset(Mips_address value, | |
6254 | Mips_output_data_got<size, big_endian>* got) | |
6255 | { | |
6256 | typename Got_page_offsets::iterator it = this->got_page_offsets_.find(value); | |
6257 | if (it != this->got_page_offsets_.end()) | |
6258 | return it->second; | |
6259 | ||
6260 | gold_assert(this->got_page_offset_next_ < this->got_page_offset_start_ | |
6261 | + (size/8) * this->page_gotno_); | |
6262 | ||
6263 | unsigned int got_offset = this->got_page_offset_next_; | |
6264 | this->got_page_offsets_[value] = got_offset; | |
6265 | this->got_page_offset_next_ += size/8; | |
6266 | got->update_got_entry(got_offset, value); | |
6267 | return got_offset; | |
6268 | } | |
6269 | ||
6270 | // Remove lazy-binding stubs for global symbols in this GOT. | |
6271 | ||
6272 | template<int size, bool big_endian> | |
6273 | void | |
6274 | Mips_got_info<size, big_endian>::remove_lazy_stubs( | |
6275 | Target_mips<size, big_endian>* target) | |
6276 | { | |
6277 | for (typename Got_entry_set::iterator | |
6278 | p = this->got_entries_.begin(); | |
6279 | p != this->got_entries_.end(); | |
6280 | ++p) | |
6281 | { | |
6282 | Mips_got_entry<size, big_endian>* entry = *p; | |
6283 | if (entry->is_for_global_symbol()) | |
6284 | target->remove_lazy_stub_entry(entry->sym()); | |
6285 | } | |
6286 | } | |
6287 | ||
6288 | // Count the number of GOT entries required. | |
6289 | ||
6290 | template<int size, bool big_endian> | |
6291 | void | |
6292 | Mips_got_info<size, big_endian>::count_got_entries() | |
6293 | { | |
6294 | for (typename Got_entry_set::iterator | |
6295 | p = this->got_entries_.begin(); | |
6296 | p != this->got_entries_.end(); | |
6297 | ++p) | |
6298 | { | |
6299 | this->count_got_entry(*p); | |
6300 | } | |
6301 | } | |
6302 | ||
6303 | // Count the number of GOT entries required by ENTRY. Accumulate the result. | |
6304 | ||
6305 | template<int size, bool big_endian> | |
6306 | void | |
6307 | Mips_got_info<size, big_endian>::count_got_entry( | |
6308 | Mips_got_entry<size, big_endian>* entry) | |
6309 | { | |
6310 | if (entry->is_tls_entry()) | |
6311 | this->tls_gotno_ += mips_tls_got_entries(entry->tls_type()); | |
6312 | else if (entry->is_for_local_symbol() | |
6313 | || entry->sym()->global_got_area() == GGA_NONE) | |
6314 | ++this->local_gotno_; | |
6315 | else | |
6316 | ++this->global_gotno_; | |
6317 | } | |
6318 | ||
6319 | // Add FROM's GOT entries. | |
6320 | ||
6321 | template<int size, bool big_endian> | |
6322 | void | |
6323 | Mips_got_info<size, big_endian>::add_got_entries( | |
6324 | Mips_got_info<size, big_endian>* from) | |
6325 | { | |
6326 | for (typename Got_entry_set::iterator | |
6327 | p = from->got_entries_.begin(); | |
6328 | p != from->got_entries_.end(); | |
6329 | ++p) | |
6330 | { | |
6331 | Mips_got_entry<size, big_endian>* entry = *p; | |
6332 | if (this->got_entries_.find(entry) == this->got_entries_.end()) | |
6333 | { | |
6334 | Mips_got_entry<size, big_endian>* entry2 = | |
6335 | new Mips_got_entry<size, big_endian>(*entry); | |
6336 | this->got_entries_.insert(entry2); | |
6337 | this->count_got_entry(entry); | |
6338 | } | |
6339 | } | |
6340 | } | |
6341 | ||
6342 | // Add FROM's GOT page entries. | |
6343 | ||
6344 | template<int size, bool big_endian> | |
6345 | void | |
6346 | Mips_got_info<size, big_endian>::add_got_page_entries( | |
6347 | Mips_got_info<size, big_endian>* from) | |
6348 | { | |
6349 | for (typename Got_page_entry_set::iterator | |
6350 | p = from->got_page_entries_.begin(); | |
6351 | p != from->got_page_entries_.end(); | |
6352 | ++p) | |
6353 | { | |
6354 | Got_page_entry* entry = *p; | |
6355 | if (this->got_page_entries_.find(entry) == this->got_page_entries_.end()) | |
6356 | { | |
6357 | Got_page_entry* entry2 = new Got_page_entry(*entry); | |
6358 | this->got_page_entries_.insert(entry2); | |
6359 | this->page_gotno_ += entry->num_pages; | |
6360 | } | |
6361 | } | |
6362 | } | |
6363 | ||
6364 | // Mips_output_data_got methods. | |
6365 | ||
6366 | // Lay out the GOT. Add local, global and TLS entries. If GOT is | |
6367 | // larger than 64K, create multi-GOT. | |
6368 | ||
6369 | template<int size, bool big_endian> | |
6370 | void | |
6371 | Mips_output_data_got<size, big_endian>::lay_out_got(Layout* layout, | |
6372 | Symbol_table* symtab, const Input_objects* input_objects) | |
6373 | { | |
6374 | // Decide which symbols need to go in the global part of the GOT and | |
6375 | // count the number of reloc-only GOT symbols. | |
6376 | this->master_got_info_->count_got_symbols(symtab); | |
6377 | ||
6378 | // Count the number of GOT entries. | |
6379 | this->master_got_info_->count_got_entries(); | |
6380 | ||
6381 | unsigned int got_size = this->master_got_info_->got_size(); | |
6382 | if (got_size > Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE) | |
6383 | this->lay_out_multi_got(layout, input_objects); | |
6384 | else | |
6385 | { | |
6386 | // Record that all objects use single GOT. | |
6387 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); | |
6388 | p != input_objects->relobj_end(); | |
6389 | ++p) | |
6390 | { | |
6391 | Mips_relobj<size, big_endian>* object = | |
6392 | Mips_relobj<size, big_endian>::as_mips_relobj(*p); | |
6393 | if (object->get_got_info() != NULL) | |
6394 | object->set_got_info(this->master_got_info_); | |
6395 | } | |
6396 | ||
6397 | this->master_got_info_->add_local_entries(this->target_, layout); | |
6398 | this->master_got_info_->add_global_entries(this->target_, layout, | |
6399 | /*not used*/-1U); | |
6400 | this->master_got_info_->add_tls_entries(this->target_, layout); | |
6401 | } | |
6402 | } | |
6403 | ||
6404 | // Create multi-GOT. For every GOT, add local, global and TLS entries. | |
6405 | ||
6406 | template<int size, bool big_endian> | |
6407 | void | |
6408 | Mips_output_data_got<size, big_endian>::lay_out_multi_got(Layout* layout, | |
6409 | const Input_objects* input_objects) | |
6410 | { | |
6411 | // Try to merge the GOTs of input objects together, as long as they | |
6412 | // don't seem to exceed the maximum GOT size, choosing one of them | |
6413 | // to be the primary GOT. | |
6414 | this->merge_gots(input_objects); | |
6415 | ||
6416 | // Every symbol that is referenced in a dynamic relocation must be | |
6417 | // present in the primary GOT. | |
6418 | this->primary_got_->set_global_gotno(this->master_got_info_->global_gotno()); | |
6419 | ||
6420 | // Add GOT entries. | |
6421 | unsigned int i = 0; | |
6422 | unsigned int offset = 0; | |
6423 | Mips_got_info<size, big_endian>* g = this->primary_got_; | |
6424 | do | |
6425 | { | |
6426 | g->set_index(i); | |
6427 | g->set_offset(offset); | |
6428 | ||
6429 | g->add_local_entries(this->target_, layout); | |
6430 | if (i == 0) | |
6431 | g->add_global_entries(this->target_, layout, | |
6432 | (this->master_got_info_->global_gotno() | |
6433 | - this->master_got_info_->reloc_only_gotno())); | |
6434 | else | |
6435 | g->add_global_entries(this->target_, layout, /*not used*/-1U); | |
6436 | g->add_tls_entries(this->target_, layout); | |
6437 | ||
6438 | // Forbid global symbols in every non-primary GOT from having | |
6439 | // lazy-binding stubs. | |
6440 | if (i > 0) | |
6441 | g->remove_lazy_stubs(this->target_); | |
6442 | ||
6443 | ++i; | |
6444 | offset += g->got_size(); | |
6445 | g = g->next(); | |
6446 | } | |
6447 | while (g); | |
6448 | } | |
6449 | ||
6450 | // Attempt to merge GOTs of different input objects. Try to use as much as | |
6451 | // possible of the primary GOT, since it doesn't require explicit dynamic | |
6452 | // relocations, but don't use objects that would reference global symbols | |
6453 | // out of the addressable range. Failing the primary GOT, attempt to merge | |
6454 | // with the current GOT, or finish the current GOT and then make make the new | |
6455 | // GOT current. | |
6456 | ||
6457 | template<int size, bool big_endian> | |
6458 | void | |
6459 | Mips_output_data_got<size, big_endian>::merge_gots( | |
6460 | const Input_objects* input_objects) | |
6461 | { | |
6462 | gold_assert(this->primary_got_ == NULL); | |
6463 | Mips_got_info<size, big_endian>* current = NULL; | |
6464 | ||
6465 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); | |
6466 | p != input_objects->relobj_end(); | |
6467 | ++p) | |
6468 | { | |
6469 | Mips_relobj<size, big_endian>* object = | |
6470 | Mips_relobj<size, big_endian>::as_mips_relobj(*p); | |
6471 | ||
6472 | Mips_got_info<size, big_endian>* g = object->get_got_info(); | |
6473 | if (g == NULL) | |
6474 | continue; | |
6475 | ||
6476 | g->count_got_entries(); | |
6477 | ||
6478 | // Work out the number of page, local and TLS entries. | |
6479 | unsigned int estimate = this->master_got_info_->page_gotno(); | |
6480 | if (estimate > g->page_gotno()) | |
6481 | estimate = g->page_gotno(); | |
6482 | estimate += g->local_gotno() + g->tls_gotno(); | |
6483 | ||
6484 | // We place TLS GOT entries after both locals and globals. The globals | |
6485 | // for the primary GOT may overflow the normal GOT size limit, so be | |
6486 | // sure not to merge a GOT which requires TLS with the primary GOT in that | |
6487 | // case. This doesn't affect non-primary GOTs. | |
6488 | estimate += (g->tls_gotno() > 0 ? this->master_got_info_->global_gotno() | |
6489 | : g->global_gotno()); | |
6490 | ||
6491 | unsigned int max_count = | |
6492 | Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE / (size/8) - 2; | |
6493 | if (estimate <= max_count) | |
6494 | { | |
6495 | // If we don't have a primary GOT, use it as | |
6496 | // a starting point for the primary GOT. | |
6497 | if (!this->primary_got_) | |
6498 | { | |
6499 | this->primary_got_ = g; | |
6500 | continue; | |
6501 | } | |
6502 | ||
6503 | // Try merging with the primary GOT. | |
6504 | if (this->merge_got_with(g, object, this->primary_got_)) | |
6505 | continue; | |
6506 | } | |
6507 | ||
6508 | // If we can merge with the last-created GOT, do it. | |
6509 | if (current && this->merge_got_with(g, object, current)) | |
6510 | continue; | |
6511 | ||
6512 | // Well, we couldn't merge, so create a new GOT. Don't check if it | |
6513 | // fits; if it turns out that it doesn't, we'll get relocation | |
6514 | // overflows anyway. | |
6515 | g->set_next(current); | |
6516 | current = g; | |
6517 | } | |
6518 | ||
6519 | // If we do not find any suitable primary GOT, create an empty one. | |
6520 | if (this->primary_got_ == NULL) | |
6521 | this->primary_got_ = new Mips_got_info<size, big_endian>(); | |
6522 | ||
6523 | // Link primary GOT with secondary GOTs. | |
6524 | this->primary_got_->set_next(current); | |
6525 | } | |
6526 | ||
6527 | // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if | |
6528 | // this would lead to overflow, true if they were merged successfully. | |
6529 | ||
6530 | template<int size, bool big_endian> | |
6531 | bool | |
6532 | Mips_output_data_got<size, big_endian>::merge_got_with( | |
6533 | Mips_got_info<size, big_endian>* from, | |
6534 | Mips_relobj<size, big_endian>* object, | |
6535 | Mips_got_info<size, big_endian>* to) | |
6536 | { | |
6537 | // Work out how many page entries we would need for the combined GOT. | |
6538 | unsigned int estimate = this->master_got_info_->page_gotno(); | |
6539 | if (estimate >= from->page_gotno() + to->page_gotno()) | |
6540 | estimate = from->page_gotno() + to->page_gotno(); | |
6541 | ||
6542 | // Conservatively estimate how many local and TLS entries would be needed. | |
6543 | estimate += from->local_gotno() + to->local_gotno(); | |
6544 | estimate += from->tls_gotno() + to->tls_gotno(); | |
6545 | ||
6546 | // If we're merging with the primary got, any TLS relocations will | |
6547 | // come after the full set of global entries. Otherwise estimate those | |
6548 | // conservatively as well. | |
6549 | if (to == this->primary_got_ && (from->tls_gotno() + to->tls_gotno()) > 0) | |
6550 | estimate += this->master_got_info_->global_gotno(); | |
6551 | else | |
6552 | estimate += from->global_gotno() + to->global_gotno(); | |
6553 | ||
6554 | // Bail out if the combined GOT might be too big. | |
6555 | unsigned int max_count = | |
6556 | Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE / (size/8) - 2; | |
6557 | if (estimate > max_count) | |
6558 | return false; | |
6559 | ||
6560 | // Transfer the object's GOT information from FROM to TO. | |
6561 | to->add_got_entries(from); | |
6562 | to->add_got_page_entries(from); | |
6563 | ||
6564 | // Record that OBJECT should use output GOT TO. | |
6565 | object->set_got_info(to); | |
6566 | ||
6567 | return true; | |
6568 | } | |
6569 | ||
6570 | // Write out the GOT. | |
6571 | ||
6572 | template<int size, bool big_endian> | |
6573 | void | |
6574 | Mips_output_data_got<size, big_endian>::do_write(Output_file* of) | |
6575 | { | |
a080d84d AV |
6576 | typedef Unordered_set<Mips_symbol<size>*, Mips_symbol_hash<size> > |
6577 | Mips_stubs_entry_set; | |
6578 | ||
9810d34d SS |
6579 | // Call parent to write out GOT. |
6580 | Output_data_got<size, big_endian>::do_write(of); | |
6581 | ||
6582 | const off_t offset = this->offset(); | |
6583 | const section_size_type oview_size = | |
6584 | convert_to_section_size_type(this->data_size()); | |
6585 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
6586 | ||
6587 | // Needed for fixing values of .got section. | |
6588 | this->got_view_ = oview; | |
6589 | ||
6590 | // Write lazy stub addresses. | |
a080d84d | 6591 | for (typename Mips_stubs_entry_set::iterator |
9810d34d SS |
6592 | p = this->master_got_info_->global_got_symbols().begin(); |
6593 | p != this->master_got_info_->global_got_symbols().end(); | |
6594 | ++p) | |
6595 | { | |
6596 | Mips_symbol<size>* mips_sym = *p; | |
6597 | if (mips_sym->has_lazy_stub()) | |
6598 | { | |
6599 | Valtype* wv = reinterpret_cast<Valtype*>( | |
6600 | oview + this->get_primary_got_offset(mips_sym)); | |
6601 | Valtype value = | |
6602 | this->target_->mips_stubs_section()->stub_address(mips_sym); | |
6603 | elfcpp::Swap<size, big_endian>::writeval(wv, value); | |
6604 | } | |
6605 | } | |
6606 | ||
6607 | // Add +1 to GGA_NONE nonzero MIPS16 and microMIPS entries. | |
a080d84d | 6608 | for (typename Mips_stubs_entry_set::iterator |
9810d34d SS |
6609 | p = this->master_got_info_->global_got_symbols().begin(); |
6610 | p != this->master_got_info_->global_got_symbols().end(); | |
6611 | ++p) | |
6612 | { | |
6613 | Mips_symbol<size>* mips_sym = *p; | |
6614 | if (!this->multi_got() | |
6615 | && (mips_sym->is_mips16() || mips_sym->is_micromips()) | |
6616 | && mips_sym->global_got_area() == GGA_NONE | |
6617 | && mips_sym->has_got_offset(GOT_TYPE_STANDARD)) | |
6618 | { | |
6619 | Valtype* wv = reinterpret_cast<Valtype*>( | |
6620 | oview + mips_sym->got_offset(GOT_TYPE_STANDARD)); | |
6621 | Valtype value = elfcpp::Swap<size, big_endian>::readval(wv); | |
6622 | if (value != 0) | |
6623 | { | |
6624 | value |= 1; | |
6625 | elfcpp::Swap<size, big_endian>::writeval(wv, value); | |
6626 | } | |
6627 | } | |
6628 | } | |
6629 | ||
6630 | if (!this->secondary_got_relocs_.empty()) | |
6631 | { | |
6632 | // Fixup for the secondary GOT R_MIPS_REL32 relocs. For global | |
6633 | // secondary GOT entries with non-zero initial value copy the value | |
6634 | // to the corresponding primary GOT entry, and set the secondary GOT | |
6635 | // entry to zero. | |
6636 | // TODO(sasa): This is workaround. It needs to be investigated further. | |
6637 | ||
6638 | for (size_t i = 0; i < this->secondary_got_relocs_.size(); ++i) | |
6639 | { | |
6640 | Static_reloc& reloc(this->secondary_got_relocs_[i]); | |
6641 | if (reloc.symbol_is_global()) | |
6642 | { | |
6643 | Mips_symbol<size>* gsym = reloc.symbol(); | |
6644 | gold_assert(gsym != NULL); | |
6645 | ||
6646 | unsigned got_offset = reloc.got_offset(); | |
6647 | gold_assert(got_offset < oview_size); | |
6648 | ||
6649 | // Find primary GOT entry. | |
6650 | Valtype* wv_prim = reinterpret_cast<Valtype*>( | |
6651 | oview + this->get_primary_got_offset(gsym)); | |
6652 | ||
6653 | // Find secondary GOT entry. | |
6654 | Valtype* wv_sec = reinterpret_cast<Valtype*>(oview + got_offset); | |
6655 | ||
6656 | Valtype value = elfcpp::Swap<size, big_endian>::readval(wv_sec); | |
6657 | if (value != 0) | |
6658 | { | |
6659 | elfcpp::Swap<size, big_endian>::writeval(wv_prim, value); | |
6660 | elfcpp::Swap<size, big_endian>::writeval(wv_sec, 0); | |
6661 | gsym->set_applied_secondary_got_fixup(); | |
6662 | } | |
6663 | } | |
6664 | } | |
6665 | ||
6666 | of->write_output_view(offset, oview_size, oview); | |
6667 | } | |
6668 | ||
6669 | // We are done if there is no fix up. | |
6670 | if (this->static_relocs_.empty()) | |
6671 | return; | |
6672 | ||
6673 | Output_segment* tls_segment = this->layout_->tls_segment(); | |
6674 | gold_assert(tls_segment != NULL); | |
6675 | ||
6676 | for (size_t i = 0; i < this->static_relocs_.size(); ++i) | |
6677 | { | |
6678 | Static_reloc& reloc(this->static_relocs_[i]); | |
6679 | ||
6680 | Mips_address value; | |
6681 | if (!reloc.symbol_is_global()) | |
6682 | { | |
6683 | Sized_relobj_file<size, big_endian>* object = reloc.relobj(); | |
6684 | const Symbol_value<size>* psymval = | |
6685 | object->local_symbol(reloc.index()); | |
6686 | ||
6687 | // We are doing static linking. Issue an error and skip this | |
6688 | // relocation if the symbol is undefined or in a discarded_section. | |
6689 | bool is_ordinary; | |
6690 | unsigned int shndx = psymval->input_shndx(&is_ordinary); | |
6691 | if ((shndx == elfcpp::SHN_UNDEF) | |
6692 | || (is_ordinary | |
6693 | && shndx != elfcpp::SHN_UNDEF | |
6694 | && !object->is_section_included(shndx) | |
6695 | && !this->symbol_table_->is_section_folded(object, shndx))) | |
6696 | { | |
6697 | gold_error(_("undefined or discarded local symbol %u from " | |
6698 | " object %s in GOT"), | |
6699 | reloc.index(), reloc.relobj()->name().c_str()); | |
6700 | continue; | |
6701 | } | |
6702 | ||
6703 | value = psymval->value(object, 0); | |
6704 | } | |
6705 | else | |
6706 | { | |
6707 | const Mips_symbol<size>* gsym = reloc.symbol(); | |
6708 | gold_assert(gsym != NULL); | |
6709 | ||
6710 | // We are doing static linking. Issue an error and skip this | |
6711 | // relocation if the symbol is undefined or in a discarded_section | |
6712 | // unless it is a weakly_undefined symbol. | |
6713 | if ((gsym->is_defined_in_discarded_section() || gsym->is_undefined()) | |
6714 | && !gsym->is_weak_undefined()) | |
6715 | { | |
6716 | gold_error(_("undefined or discarded symbol %s in GOT"), | |
6717 | gsym->name()); | |
6718 | continue; | |
6719 | } | |
6720 | ||
6721 | if (!gsym->is_weak_undefined()) | |
6722 | value = gsym->value(); | |
6723 | else | |
6724 | value = 0; | |
6725 | } | |
6726 | ||
6727 | unsigned got_offset = reloc.got_offset(); | |
6728 | gold_assert(got_offset < oview_size); | |
6729 | ||
6730 | Valtype* wv = reinterpret_cast<Valtype*>(oview + got_offset); | |
6731 | Valtype x; | |
6732 | ||
6733 | switch (reloc.r_type()) | |
6734 | { | |
6735 | case elfcpp::R_MIPS_TLS_DTPMOD32: | |
6736 | case elfcpp::R_MIPS_TLS_DTPMOD64: | |
6737 | x = value; | |
6738 | break; | |
6739 | case elfcpp::R_MIPS_TLS_DTPREL32: | |
6740 | case elfcpp::R_MIPS_TLS_DTPREL64: | |
6741 | x = value - elfcpp::DTP_OFFSET; | |
6742 | break; | |
6743 | case elfcpp::R_MIPS_TLS_TPREL32: | |
6744 | case elfcpp::R_MIPS_TLS_TPREL64: | |
6745 | x = value - elfcpp::TP_OFFSET; | |
6746 | break; | |
6747 | default: | |
6748 | gold_unreachable(); | |
6749 | break; | |
6750 | } | |
6751 | ||
6752 | elfcpp::Swap<size, big_endian>::writeval(wv, x); | |
6753 | } | |
6754 | ||
6755 | of->write_output_view(offset, oview_size, oview); | |
6756 | } | |
6757 | ||
6758 | // Mips_relobj methods. | |
6759 | ||
6760 | // Count the local symbols. The Mips backend needs to know if a symbol | |
6761 | // is a MIPS16 or microMIPS function or not. For global symbols, it is easy | |
6762 | // because the Symbol object keeps the ELF symbol type and st_other field. | |
6763 | // For local symbol it is harder because we cannot access this information. | |
6764 | // So we override the do_count_local_symbol in parent and scan local symbols to | |
6765 | // mark MIPS16 and microMIPS functions. This is not the most efficient way but | |
6766 | // I do not want to slow down other ports by calling a per symbol target hook | |
6767 | // inside Sized_relobj_file<size, big_endian>::do_count_local_symbols. | |
6768 | ||
6769 | template<int size, bool big_endian> | |
6770 | void | |
6771 | Mips_relobj<size, big_endian>::do_count_local_symbols( | |
6772 | Stringpool_template<char>* pool, | |
6773 | Stringpool_template<char>* dynpool) | |
6774 | { | |
6775 | // Ask parent to count the local symbols. | |
6776 | Sized_relobj_file<size, big_endian>::do_count_local_symbols(pool, dynpool); | |
6777 | const unsigned int loccount = this->local_symbol_count(); | |
6778 | if (loccount == 0) | |
6779 | return; | |
6780 | ||
6781 | // Initialize the mips16 and micromips function bit-vector. | |
6782 | this->local_symbol_is_mips16_.resize(loccount, false); | |
6783 | this->local_symbol_is_micromips_.resize(loccount, false); | |
6784 | ||
6785 | // Read the symbol table section header. | |
6786 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
6787 | elfcpp::Shdr<size, big_endian> | |
6788 | symtabshdr(this, this->elf_file()->section_header(symtab_shndx)); | |
6789 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); | |
6790 | ||
6791 | // Read the local symbols. | |
6792 | const int sym_size = elfcpp::Elf_sizes<size>::sym_size; | |
6793 | gold_assert(loccount == symtabshdr.get_sh_info()); | |
6794 | off_t locsize = loccount * sym_size; | |
6795 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), | |
6796 | locsize, true, true); | |
6797 | ||
6798 | // Loop over the local symbols and mark any MIPS16 or microMIPS local symbols. | |
6799 | ||
6800 | // Skip the first dummy symbol. | |
6801 | psyms += sym_size; | |
6802 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
6803 | { | |
6804 | elfcpp::Sym<size, big_endian> sym(psyms); | |
6805 | unsigned char st_other = sym.get_st_other(); | |
6806 | this->local_symbol_is_mips16_[i] = elfcpp::elf_st_is_mips16(st_other); | |
6807 | this->local_symbol_is_micromips_[i] = | |
6808 | elfcpp::elf_st_is_micromips(st_other); | |
6809 | } | |
6810 | } | |
6811 | ||
6812 | // Read the symbol information. | |
6813 | ||
6814 | template<int size, bool big_endian> | |
6815 | void | |
6816 | Mips_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd) | |
6817 | { | |
6818 | // Call parent class to read symbol information. | |
f35c4853 | 6819 | this->base_read_symbols(sd); |
9810d34d SS |
6820 | |
6821 | // Read processor-specific flags in ELF file header. | |
6822 | const unsigned char* pehdr = this->get_view(elfcpp::file_header_offset, | |
6823 | elfcpp::Elf_sizes<size>::ehdr_size, | |
6824 | true, false); | |
6825 | elfcpp::Ehdr<size, big_endian> ehdr(pehdr); | |
6826 | this->processor_specific_flags_ = ehdr.get_e_flags(); | |
6827 | ||
6828 | // Get the section names. | |
6829 | const unsigned char* pnamesu = sd->section_names->data(); | |
6830 | const char* pnames = reinterpret_cast<const char*>(pnamesu); | |
6831 | ||
6832 | // Initialize the mips16 stub section bit-vectors. | |
6833 | this->section_is_mips16_fn_stub_.resize(this->shnum(), false); | |
6834 | this->section_is_mips16_call_stub_.resize(this->shnum(), false); | |
6835 | this->section_is_mips16_call_fp_stub_.resize(this->shnum(), false); | |
6836 | ||
6837 | const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
6838 | const unsigned char* pshdrs = sd->section_headers->data(); | |
6839 | const unsigned char* ps = pshdrs + shdr_size; | |
6840 | for (unsigned int i = 1; i < this->shnum(); ++i, ps += shdr_size) | |
6841 | { | |
6842 | elfcpp::Shdr<size, big_endian> shdr(ps); | |
6843 | ||
6844 | if (shdr.get_sh_type() == elfcpp::SHT_MIPS_REGINFO) | |
6845 | { | |
82e49872 | 6846 | this->has_reginfo_section_ = true; |
9810d34d SS |
6847 | // Read the gp value that was used to create this object. We need the |
6848 | // gp value while processing relocs. The .reginfo section is not used | |
6849 | // in the 64-bit MIPS ELF ABI. | |
6850 | section_offset_type section_offset = shdr.get_sh_offset(); | |
6851 | section_size_type section_size = | |
6852 | convert_to_section_size_type(shdr.get_sh_size()); | |
6853 | const unsigned char* view = | |
6854 | this->get_view(section_offset, section_size, true, false); | |
6855 | ||
6856 | this->gp_ = elfcpp::Swap<size, big_endian>::readval(view + 20); | |
6857 | ||
6858 | // Read the rest of .reginfo. | |
6859 | this->gprmask_ = elfcpp::Swap<size, big_endian>::readval(view); | |
6860 | this->cprmask1_ = elfcpp::Swap<size, big_endian>::readval(view + 4); | |
6861 | this->cprmask2_ = elfcpp::Swap<size, big_endian>::readval(view + 8); | |
6862 | this->cprmask3_ = elfcpp::Swap<size, big_endian>::readval(view + 12); | |
6863 | this->cprmask4_ = elfcpp::Swap<size, big_endian>::readval(view + 16); | |
6864 | } | |
6865 | ||
b52717c0 VR |
6866 | if (shdr.get_sh_type() == elfcpp::SHT_GNU_ATTRIBUTES) |
6867 | { | |
6868 | gold_assert(this->attributes_section_data_ == NULL); | |
6869 | section_offset_type section_offset = shdr.get_sh_offset(); | |
6870 | section_size_type section_size = | |
6871 | convert_to_section_size_type(shdr.get_sh_size()); | |
6872 | const unsigned char* view = | |
6873 | this->get_view(section_offset, section_size, true, false); | |
6874 | this->attributes_section_data_ = | |
6875 | new Attributes_section_data(view, section_size); | |
6876 | } | |
6877 | ||
6878 | if (shdr.get_sh_type() == elfcpp::SHT_MIPS_ABIFLAGS) | |
6879 | { | |
6880 | gold_assert(this->abiflags_ == NULL); | |
6881 | section_offset_type section_offset = shdr.get_sh_offset(); | |
6882 | section_size_type section_size = | |
6883 | convert_to_section_size_type(shdr.get_sh_size()); | |
6884 | const unsigned char* view = | |
6885 | this->get_view(section_offset, section_size, true, false); | |
6886 | this->abiflags_ = new Mips_abiflags<big_endian>(); | |
6887 | ||
6888 | this->abiflags_->version = | |
6889 | elfcpp::Swap<16, big_endian>::readval(view); | |
6890 | if (this->abiflags_->version != 0) | |
6891 | { | |
6892 | gold_error(_("%s: .MIPS.abiflags section has " | |
6893 | "unsupported version %u"), | |
6894 | this->name().c_str(), | |
6895 | this->abiflags_->version); | |
6896 | break; | |
6897 | } | |
6898 | this->abiflags_->isa_level = | |
6899 | elfcpp::Swap<8, big_endian>::readval(view + 2); | |
6900 | this->abiflags_->isa_rev = | |
6901 | elfcpp::Swap<8, big_endian>::readval(view + 3); | |
6902 | this->abiflags_->gpr_size = | |
6903 | elfcpp::Swap<8, big_endian>::readval(view + 4); | |
6904 | this->abiflags_->cpr1_size = | |
6905 | elfcpp::Swap<8, big_endian>::readval(view + 5); | |
6906 | this->abiflags_->cpr2_size = | |
6907 | elfcpp::Swap<8, big_endian>::readval(view + 6); | |
6908 | this->abiflags_->fp_abi = | |
6909 | elfcpp::Swap<8, big_endian>::readval(view + 7); | |
6910 | this->abiflags_->isa_ext = | |
6911 | elfcpp::Swap<32, big_endian>::readval(view + 8); | |
6912 | this->abiflags_->ases = | |
6913 | elfcpp::Swap<32, big_endian>::readval(view + 12); | |
6914 | this->abiflags_->flags1 = | |
6915 | elfcpp::Swap<32, big_endian>::readval(view + 16); | |
6916 | this->abiflags_->flags2 = | |
6917 | elfcpp::Swap<32, big_endian>::readval(view + 20); | |
6918 | } | |
6919 | ||
47a9f4fc VR |
6920 | // In the 64-bit ABI, .MIPS.options section holds register information. |
6921 | // A SHT_MIPS_OPTIONS section contains a series of options, each of which | |
6922 | // starts with this header: | |
6923 | // | |
6924 | // typedef struct | |
6925 | // { | |
6926 | // // Type of option. | |
6927 | // unsigned char kind[1]; | |
6928 | // // Size of option descriptor, including header. | |
6929 | // unsigned char size[1]; | |
6930 | // // Section index of affected section, or 0 for global option. | |
6931 | // unsigned char section[2]; | |
6932 | // // Information specific to this kind of option. | |
6933 | // unsigned char info[4]; | |
6934 | // }; | |
6935 | // | |
6936 | // For a SHT_MIPS_OPTIONS section, look for a ODK_REGINFO entry, and set | |
6937 | // the gp value based on what we find. We may see both SHT_MIPS_REGINFO | |
6938 | // and SHT_MIPS_OPTIONS/ODK_REGINFO; in that case, they should agree. | |
9810d34d | 6939 | |
47a9f4fc | 6940 | if (shdr.get_sh_type() == elfcpp::SHT_MIPS_OPTIONS) |
9810d34d | 6941 | { |
47a9f4fc VR |
6942 | section_offset_type section_offset = shdr.get_sh_offset(); |
6943 | section_size_type section_size = | |
6944 | convert_to_section_size_type(shdr.get_sh_size()); | |
6945 | const unsigned char* view = | |
6946 | this->get_view(section_offset, section_size, true, false); | |
6947 | const unsigned char* end = view + section_size; | |
6948 | ||
6949 | while (view + 8 <= end) | |
6950 | { | |
6951 | unsigned char kind = elfcpp::Swap<8, big_endian>::readval(view); | |
6952 | unsigned char sz = elfcpp::Swap<8, big_endian>::readval(view + 1); | |
6953 | if (sz < 8) | |
6954 | { | |
6955 | gold_error(_("%s: Warning: bad `%s' option size %u smaller " | |
6956 | "than its header"), | |
6957 | this->name().c_str(), | |
6958 | this->mips_elf_options_section_name(), sz); | |
6959 | break; | |
6960 | } | |
6961 | ||
6962 | if (this->is_n64() && kind == elfcpp::ODK_REGINFO) | |
6963 | { | |
6964 | // In the 64 bit ABI, an ODK_REGINFO option is the following | |
6965 | // structure. The info field of the options header is not | |
6966 | // used. | |
6967 | // | |
6968 | // typedef struct | |
6969 | // { | |
6970 | // // Mask of general purpose registers used. | |
6971 | // unsigned char ri_gprmask[4]; | |
6972 | // // Padding. | |
6973 | // unsigned char ri_pad[4]; | |
6974 | // // Mask of co-processor registers used. | |
6975 | // unsigned char ri_cprmask[4][4]; | |
6976 | // // GP register value for this object file. | |
6977 | // unsigned char ri_gp_value[8]; | |
6978 | // }; | |
6979 | ||
6980 | this->gp_ = elfcpp::Swap<size, big_endian>::readval(view | |
6981 | + 32); | |
6982 | } | |
6983 | else if (kind == elfcpp::ODK_REGINFO) | |
6984 | { | |
6985 | // In the 32 bit ABI, an ODK_REGINFO option is the following | |
6986 | // structure. The info field of the options header is not | |
6987 | // used. The same structure is used in .reginfo section. | |
6988 | // | |
6989 | // typedef struct | |
6990 | // { | |
6991 | // unsigned char ri_gprmask[4]; | |
6992 | // unsigned char ri_cprmask[4][4]; | |
6993 | // unsigned char ri_gp_value[4]; | |
6994 | // }; | |
6995 | ||
6996 | this->gp_ = elfcpp::Swap<size, big_endian>::readval(view | |
6997 | + 28); | |
6998 | } | |
6999 | view += sz; | |
7000 | } | |
7001 | } | |
7002 | ||
7003 | const char* name = pnames + shdr.get_sh_name(); | |
7004 | this->section_is_mips16_fn_stub_[i] = is_prefix_of(".mips16.fn", name); | |
7005 | this->section_is_mips16_call_stub_[i] = | |
7006 | is_prefix_of(".mips16.call.", name); | |
7007 | this->section_is_mips16_call_fp_stub_[i] = | |
7008 | is_prefix_of(".mips16.call.fp.", name); | |
7009 | ||
7010 | if (strcmp(name, ".pdr") == 0) | |
7011 | { | |
7012 | gold_assert(this->pdr_shndx_ == -1U); | |
7013 | this->pdr_shndx_ = i; | |
7014 | } | |
7015 | } | |
7016 | } | |
7017 | ||
9810d34d SS |
7018 | // Discard MIPS16 stub secions that are not needed. |
7019 | ||
7020 | template<int size, bool big_endian> | |
7021 | void | |
7022 | Mips_relobj<size, big_endian>::discard_mips16_stub_sections(Symbol_table* symtab) | |
7023 | { | |
7024 | for (typename Mips16_stubs_int_map::const_iterator | |
7025 | it = this->mips16_stub_sections_.begin(); | |
7026 | it != this->mips16_stub_sections_.end(); ++it) | |
7027 | { | |
7028 | Mips16_stub_section<size, big_endian>* stub_section = it->second; | |
7029 | if (!stub_section->is_target_found()) | |
7030 | { | |
7031 | gold_error(_("no relocation found in mips16 stub section '%s'"), | |
7032 | stub_section->object() | |
7033 | ->section_name(stub_section->shndx()).c_str()); | |
7034 | } | |
7035 | ||
7036 | bool discard = false; | |
7037 | if (stub_section->is_for_local_function()) | |
7038 | { | |
7039 | if (stub_section->is_fn_stub()) | |
7040 | { | |
7041 | // This stub is for a local symbol. This stub will only | |
7042 | // be needed if there is some relocation in this object, | |
7043 | // other than a 16 bit function call, which refers to this | |
7044 | // symbol. | |
7045 | if (!this->has_local_non_16bit_call_relocs(stub_section->r_sym())) | |
7046 | discard = true; | |
7047 | else | |
7048 | this->add_local_mips16_fn_stub(stub_section); | |
7049 | } | |
7050 | else | |
7051 | { | |
7052 | // This stub is for a local symbol. This stub will only | |
7053 | // be needed if there is some relocation (R_MIPS16_26) in | |
7054 | // this object that refers to this symbol. | |
7055 | gold_assert(stub_section->is_call_stub() | |
7056 | || stub_section->is_call_fp_stub()); | |
7057 | if (!this->has_local_16bit_call_relocs(stub_section->r_sym())) | |
7058 | discard = true; | |
7059 | else | |
7060 | this->add_local_mips16_call_stub(stub_section); | |
7061 | } | |
7062 | } | |
7063 | else | |
7064 | { | |
7065 | Mips_symbol<size>* gsym = stub_section->gsym(); | |
7066 | if (stub_section->is_fn_stub()) | |
7067 | { | |
7068 | if (gsym->has_mips16_fn_stub()) | |
7069 | // We already have a stub for this function. | |
7070 | discard = true; | |
7071 | else | |
7072 | { | |
7073 | gsym->set_mips16_fn_stub(stub_section); | |
7074 | if (gsym->should_add_dynsym_entry(symtab)) | |
7075 | { | |
7076 | // If we have a MIPS16 function with a stub, the | |
7077 | // dynamic symbol must refer to the stub, since only | |
7078 | // the stub uses the standard calling conventions. | |
7079 | gsym->set_need_fn_stub(); | |
7080 | if (gsym->is_from_dynobj()) | |
7081 | gsym->set_needs_dynsym_value(); | |
7082 | } | |
7083 | } | |
7084 | if (!gsym->need_fn_stub()) | |
7085 | discard = true; | |
7086 | } | |
7087 | else if (stub_section->is_call_stub()) | |
7088 | { | |
7089 | if (gsym->is_mips16()) | |
7090 | // We don't need the call_stub; this is a 16 bit | |
7091 | // function, so calls from other 16 bit functions are | |
7092 | // OK. | |
7093 | discard = true; | |
7094 | else if (gsym->has_mips16_call_stub()) | |
7095 | // We already have a stub for this function. | |
7096 | discard = true; | |
7097 | else | |
7098 | gsym->set_mips16_call_stub(stub_section); | |
7099 | } | |
7100 | else | |
7101 | { | |
7102 | gold_assert(stub_section->is_call_fp_stub()); | |
7103 | if (gsym->is_mips16()) | |
7104 | // We don't need the call_stub; this is a 16 bit | |
7105 | // function, so calls from other 16 bit functions are | |
7106 | // OK. | |
7107 | discard = true; | |
7108 | else if (gsym->has_mips16_call_fp_stub()) | |
7109 | // We already have a stub for this function. | |
7110 | discard = true; | |
7111 | else | |
7112 | gsym->set_mips16_call_fp_stub(stub_section); | |
7113 | } | |
7114 | } | |
7115 | if (discard) | |
7116 | this->set_output_section(stub_section->shndx(), NULL); | |
7117 | } | |
7118 | } | |
7119 | ||
7120 | // Mips_output_data_la25_stub methods. | |
7121 | ||
7122 | // Template for standard LA25 stub. | |
7123 | template<int size, bool big_endian> | |
7124 | const uint32_t | |
7125 | Mips_output_data_la25_stub<size, big_endian>::la25_stub_entry[] = | |
7126 | { | |
7127 | 0x3c190000, // lui $25,%hi(func) | |
7128 | 0x08000000, // j func | |
7129 | 0x27390000, // add $25,$25,%lo(func) | |
7130 | 0x00000000 // nop | |
7131 | }; | |
7132 | ||
7133 | // Template for microMIPS LA25 stub. | |
7134 | template<int size, bool big_endian> | |
7135 | const uint32_t | |
7136 | Mips_output_data_la25_stub<size, big_endian>::la25_stub_micromips_entry[] = | |
7137 | { | |
7138 | 0x41b9, 0x0000, // lui t9,%hi(func) | |
7139 | 0xd400, 0x0000, // j func | |
7140 | 0x3339, 0x0000, // addiu t9,t9,%lo(func) | |
7141 | 0x0000, 0x0000 // nop | |
7142 | }; | |
7143 | ||
7144 | // Create la25 stub for a symbol. | |
7145 | ||
7146 | template<int size, bool big_endian> | |
7147 | void | |
7148 | Mips_output_data_la25_stub<size, big_endian>::create_la25_stub( | |
7149 | Symbol_table* symtab, Target_mips<size, big_endian>* target, | |
7150 | Mips_symbol<size>* gsym) | |
7151 | { | |
7152 | if (!gsym->has_la25_stub()) | |
7153 | { | |
7154 | gsym->set_la25_stub_offset(this->symbols_.size() * 16); | |
15eb1beb | 7155 | this->symbols_.push_back(gsym); |
9810d34d SS |
7156 | this->create_stub_symbol(gsym, symtab, target, 16); |
7157 | } | |
7158 | } | |
7159 | ||
7160 | // Create a symbol for SYM stub's value and size, to help make the disassembly | |
7161 | // easier to read. | |
7162 | ||
7163 | template<int size, bool big_endian> | |
7164 | void | |
7165 | Mips_output_data_la25_stub<size, big_endian>::create_stub_symbol( | |
7166 | Mips_symbol<size>* sym, Symbol_table* symtab, | |
7167 | Target_mips<size, big_endian>* target, uint64_t symsize) | |
7168 | { | |
7169 | std::string name(".pic."); | |
7170 | name += sym->name(); | |
7171 | ||
7172 | unsigned int offset = sym->la25_stub_offset(); | |
7173 | if (sym->is_micromips()) | |
7174 | offset |= 1; | |
7175 | ||
7176 | // Make it a local function. | |
7177 | Symbol* new_sym = symtab->define_in_output_data(name.c_str(), NULL, | |
7178 | Symbol_table::PREDEFINED, | |
7179 | target->la25_stub_section(), | |
7180 | offset, symsize, elfcpp::STT_FUNC, | |
7181 | elfcpp::STB_LOCAL, | |
7182 | elfcpp::STV_DEFAULT, 0, | |
7183 | false, false); | |
7184 | new_sym->set_is_forced_local(); | |
7185 | } | |
7186 | ||
7187 | // Write out la25 stubs. This uses the hand-coded instructions above, | |
7188 | // and adjusts them as needed. | |
7189 | ||
7190 | template<int size, bool big_endian> | |
7191 | void | |
7192 | Mips_output_data_la25_stub<size, big_endian>::do_write(Output_file* of) | |
7193 | { | |
7194 | const off_t offset = this->offset(); | |
7195 | const section_size_type oview_size = | |
7196 | convert_to_section_size_type(this->data_size()); | |
7197 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
7198 | ||
15eb1beb | 7199 | for (typename std::vector<Mips_symbol<size>*>::iterator |
9810d34d SS |
7200 | p = this->symbols_.begin(); |
7201 | p != this->symbols_.end(); | |
7202 | ++p) | |
7203 | { | |
7204 | Mips_symbol<size>* sym = *p; | |
7205 | unsigned char* pov = oview + sym->la25_stub_offset(); | |
7206 | ||
7207 | Mips_address target = sym->value(); | |
7208 | if (!sym->is_micromips()) | |
7209 | { | |
7210 | elfcpp::Swap<32, big_endian>::writeval(pov, | |
7211 | la25_stub_entry[0] | (((target + 0x8000) >> 16) & 0xffff)); | |
7212 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, | |
7213 | la25_stub_entry[1] | ((target >> 2) & 0x3ffffff)); | |
7214 | elfcpp::Swap<32, big_endian>::writeval(pov + 8, | |
7215 | la25_stub_entry[2] | (target & 0xffff)); | |
7216 | elfcpp::Swap<32, big_endian>::writeval(pov + 12, la25_stub_entry[3]); | |
7217 | } | |
7218 | else | |
7219 | { | |
7220 | target |= 1; | |
7221 | // First stub instruction. Paste high 16-bits of the target. | |
7222 | elfcpp::Swap<16, big_endian>::writeval(pov, | |
7223 | la25_stub_micromips_entry[0]); | |
7224 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, | |
7225 | ((target + 0x8000) >> 16) & 0xffff); | |
7226 | // Second stub instruction. Paste low 26-bits of the target, shifted | |
7227 | // right by 1. | |
7228 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, | |
7229 | la25_stub_micromips_entry[2] | ((target >> 17) & 0x3ff)); | |
7230 | elfcpp::Swap<16, big_endian>::writeval(pov + 6, | |
7231 | la25_stub_micromips_entry[3] | ((target >> 1) & 0xffff)); | |
7232 | // Third stub instruction. Paste low 16-bits of the target. | |
7233 | elfcpp::Swap<16, big_endian>::writeval(pov + 8, | |
7234 | la25_stub_micromips_entry[4]); | |
7235 | elfcpp::Swap<16, big_endian>::writeval(pov + 10, target & 0xffff); | |
7236 | // Fourth stub instruction. | |
7237 | elfcpp::Swap<16, big_endian>::writeval(pov + 12, | |
7238 | la25_stub_micromips_entry[6]); | |
7239 | elfcpp::Swap<16, big_endian>::writeval(pov + 14, | |
7240 | la25_stub_micromips_entry[7]); | |
7241 | } | |
7242 | } | |
7243 | ||
7244 | of->write_output_view(offset, oview_size, oview); | |
7245 | } | |
7246 | ||
7247 | // Mips_output_data_plt methods. | |
7248 | ||
7249 | // The format of the first PLT entry in an O32 executable. | |
7250 | template<int size, bool big_endian> | |
7251 | const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_o32[] = | |
7252 | { | |
7253 | 0x3c1c0000, // lui $28, %hi(&GOTPLT[0]) | |
7254 | 0x8f990000, // lw $25, %lo(&GOTPLT[0])($28) | |
7255 | 0x279c0000, // addiu $28, $28, %lo(&GOTPLT[0]) | |
7256 | 0x031cc023, // subu $24, $24, $28 | |
40fc1451 | 7257 | 0x03e07825, // or $15, $31, zero |
9810d34d SS |
7258 | 0x0018c082, // srl $24, $24, 2 |
7259 | 0x0320f809, // jalr $25 | |
7260 | 0x2718fffe // subu $24, $24, 2 | |
7261 | }; | |
7262 | ||
7263 | // The format of the first PLT entry in an N32 executable. Different | |
7264 | // because gp ($28) is not available; we use t2 ($14) instead. | |
7265 | template<int size, bool big_endian> | |
7266 | const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_n32[] = | |
7267 | { | |
7268 | 0x3c0e0000, // lui $14, %hi(&GOTPLT[0]) | |
7269 | 0x8dd90000, // lw $25, %lo(&GOTPLT[0])($14) | |
7270 | 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0]) | |
7271 | 0x030ec023, // subu $24, $24, $14 | |
40fc1451 | 7272 | 0x03e07825, // or $15, $31, zero |
9810d34d SS |
7273 | 0x0018c082, // srl $24, $24, 2 |
7274 | 0x0320f809, // jalr $25 | |
7275 | 0x2718fffe // subu $24, $24, 2 | |
7276 | }; | |
7277 | ||
7278 | // The format of the first PLT entry in an N64 executable. Different | |
7279 | // from N32 because of the increased size of GOT entries. | |
7280 | template<int size, bool big_endian> | |
7281 | const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_n64[] = | |
7282 | { | |
7283 | 0x3c0e0000, // lui $14, %hi(&GOTPLT[0]) | |
7284 | 0xddd90000, // ld $25, %lo(&GOTPLT[0])($14) | |
7285 | 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0]) | |
7286 | 0x030ec023, // subu $24, $24, $14 | |
40fc1451 | 7287 | 0x03e07825, // or $15, $31, zero |
9810d34d SS |
7288 | 0x0018c0c2, // srl $24, $24, 3 |
7289 | 0x0320f809, // jalr $25 | |
7290 | 0x2718fffe // subu $24, $24, 2 | |
7291 | }; | |
7292 | ||
7293 | // The format of the microMIPS first PLT entry in an O32 executable. | |
7294 | // We rely on v0 ($2) rather than t8 ($24) to contain the address | |
7295 | // of the GOTPLT entry handled, so this stub may only be used when | |
7296 | // all the subsequent PLT entries are microMIPS code too. | |
7297 | // | |
7298 | // The trailing NOP is for alignment and correct disassembly only. | |
7299 | template<int size, bool big_endian> | |
7300 | const uint32_t Mips_output_data_plt<size, big_endian>:: | |
7301 | plt0_entry_micromips_o32[] = | |
7302 | { | |
7303 | 0x7980, 0x0000, // addiupc $3, (&GOTPLT[0]) - . | |
7304 | 0xff23, 0x0000, // lw $25, 0($3) | |
7305 | 0x0535, // subu $2, $2, $3 | |
7306 | 0x2525, // srl $2, $2, 2 | |
7307 | 0x3302, 0xfffe, // subu $24, $2, 2 | |
7308 | 0x0dff, // move $15, $31 | |
7309 | 0x45f9, // jalrs $25 | |
7310 | 0x0f83, // move $28, $3 | |
7311 | 0x0c00 // nop | |
7312 | }; | |
7313 | ||
7314 | // The format of the microMIPS first PLT entry in an O32 executable | |
7315 | // in the insn32 mode. | |
7316 | template<int size, bool big_endian> | |
7317 | const uint32_t Mips_output_data_plt<size, big_endian>:: | |
7318 | plt0_entry_micromips32_o32[] = | |
7319 | { | |
7320 | 0x41bc, 0x0000, // lui $28, %hi(&GOTPLT[0]) | |
7321 | 0xff3c, 0x0000, // lw $25, %lo(&GOTPLT[0])($28) | |
7322 | 0x339c, 0x0000, // addiu $28, $28, %lo(&GOTPLT[0]) | |
7323 | 0x0398, 0xc1d0, // subu $24, $24, $28 | |
40fc1451 | 7324 | 0x001f, 0x7a90, // or $15, $31, zero |
9810d34d SS |
7325 | 0x0318, 0x1040, // srl $24, $24, 2 |
7326 | 0x03f9, 0x0f3c, // jalr $25 | |
7327 | 0x3318, 0xfffe // subu $24, $24, 2 | |
7328 | }; | |
7329 | ||
7330 | // The format of subsequent standard entries in the PLT. | |
7331 | template<int size, bool big_endian> | |
7332 | const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry[] = | |
7333 | { | |
7334 | 0x3c0f0000, // lui $15, %hi(.got.plt entry) | |
47a9f4fc | 7335 | 0x01f90000, // l[wd] $25, %lo(.got.plt entry)($15) |
9810d34d SS |
7336 | 0x03200008, // jr $25 |
7337 | 0x25f80000 // addiu $24, $15, %lo(.got.plt entry) | |
7338 | }; | |
7339 | ||
f5b11759 VR |
7340 | // The format of subsequent R6 PLT entries. |
7341 | template<int size, bool big_endian> | |
7342 | const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry_r6[] = | |
7343 | { | |
7344 | 0x3c0f0000, // lui $15, %hi(.got.plt entry) | |
7345 | 0x01f90000, // l[wd] $25, %lo(.got.plt entry)($15) | |
7346 | 0x03200009, // jr $25 | |
7347 | 0x25f80000 // addiu $24, $15, %lo(.got.plt entry) | |
7348 | }; | |
7349 | ||
9810d34d SS |
7350 | // The format of subsequent MIPS16 o32 PLT entries. We use v1 ($3) as a |
7351 | // temporary because t8 ($24) and t9 ($25) are not directly addressable. | |
7352 | // Note that this differs from the GNU ld which uses both v0 ($2) and v1 ($3). | |
7353 | // We cannot use v0 because MIPS16 call stubs from the CS toolchain expect | |
7354 | // target function address in register v0. | |
7355 | template<int size, bool big_endian> | |
7356 | const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry_mips16_o32[] = | |
7357 | { | |
7358 | 0xb303, // lw $3, 12($pc) | |
7359 | 0x651b, // move $24, $3 | |
7360 | 0x9b60, // lw $3, 0($3) | |
7361 | 0xeb00, // jr $3 | |
7362 | 0x653b, // move $25, $3 | |
7363 | 0x6500, // nop | |
7364 | 0x0000, 0x0000 // .word (.got.plt entry) | |
7365 | }; | |
7366 | ||
7367 | // The format of subsequent microMIPS o32 PLT entries. We use v0 ($2) | |
7368 | // as a temporary because t8 ($24) is not addressable with ADDIUPC. | |
7369 | template<int size, bool big_endian> | |
7370 | const uint32_t Mips_output_data_plt<size, big_endian>:: | |
7371 | plt_entry_micromips_o32[] = | |
7372 | { | |
7373 | 0x7900, 0x0000, // addiupc $2, (.got.plt entry) - . | |
7374 | 0xff22, 0x0000, // lw $25, 0($2) | |
7375 | 0x4599, // jr $25 | |
7376 | 0x0f02 // move $24, $2 | |
7377 | }; | |
7378 | ||
7379 | // The format of subsequent microMIPS o32 PLT entries in the insn32 mode. | |
7380 | template<int size, bool big_endian> | |
7381 | const uint32_t Mips_output_data_plt<size, big_endian>:: | |
7382 | plt_entry_micromips32_o32[] = | |
7383 | { | |
7384 | 0x41af, 0x0000, // lui $15, %hi(.got.plt entry) | |
7385 | 0xff2f, 0x0000, // lw $25, %lo(.got.plt entry)($15) | |
7386 | 0x0019, 0x0f3c, // jr $25 | |
7387 | 0x330f, 0x0000 // addiu $24, $15, %lo(.got.plt entry) | |
7388 | }; | |
7389 | ||
7390 | // Add an entry to the PLT for a symbol referenced by r_type relocation. | |
7391 | ||
7392 | template<int size, bool big_endian> | |
7393 | void | |
7394 | Mips_output_data_plt<size, big_endian>::add_entry(Mips_symbol<size>* gsym, | |
7395 | unsigned int r_type) | |
7396 | { | |
7397 | gold_assert(!gsym->has_plt_offset()); | |
7398 | ||
7399 | // Final PLT offset for a symbol will be set in method set_plt_offsets(). | |
7400 | gsym->set_plt_offset(this->entry_count() * sizeof(plt_entry) | |
7401 | + sizeof(plt0_entry_o32)); | |
7402 | this->symbols_.push_back(gsym); | |
7403 | ||
7404 | // Record whether the relocation requires a standard MIPS | |
7405 | // or a compressed code entry. | |
7406 | if (jal_reloc(r_type)) | |
7407 | { | |
7408 | if (r_type == elfcpp::R_MIPS_26) | |
7409 | gsym->set_needs_mips_plt(true); | |
7410 | else | |
7411 | gsym->set_needs_comp_plt(true); | |
7412 | } | |
7413 | ||
7414 | section_offset_type got_offset = this->got_plt_->current_data_size(); | |
7415 | ||
7416 | // Every PLT entry needs a GOT entry which points back to the PLT | |
7417 | // entry (this will be changed by the dynamic linker, normally | |
7418 | // lazily when the function is called). | |
7419 | this->got_plt_->set_current_data_size(got_offset + size/8); | |
7420 | ||
7421 | gsym->set_needs_dynsym_entry(); | |
7422 | this->rel_->add_global(gsym, elfcpp::R_MIPS_JUMP_SLOT, this->got_plt_, | |
7423 | got_offset); | |
7424 | } | |
7425 | ||
7426 | // Set final PLT offsets. For each symbol, determine whether standard or | |
7427 | // compressed (MIPS16 or microMIPS) PLT entry is used. | |
7428 | ||
7429 | template<int size, bool big_endian> | |
7430 | void | |
7431 | Mips_output_data_plt<size, big_endian>::set_plt_offsets() | |
7432 | { | |
7433 | // The sizes of individual PLT entries. | |
7434 | unsigned int plt_mips_entry_size = this->standard_plt_entry_size(); | |
7435 | unsigned int plt_comp_entry_size = (!this->target_->is_output_newabi() | |
7436 | ? this->compressed_plt_entry_size() : 0); | |
7437 | ||
7438 | for (typename std::vector<Mips_symbol<size>*>::const_iterator | |
7439 | p = this->symbols_.begin(); p != this->symbols_.end(); ++p) | |
7440 | { | |
7441 | Mips_symbol<size>* mips_sym = *p; | |
7442 | ||
7443 | // There are no defined MIPS16 or microMIPS PLT entries for n32 or n64, | |
7444 | // so always use a standard entry there. | |
7445 | // | |
7446 | // If the symbol has a MIPS16 call stub and gets a PLT entry, then | |
7447 | // all MIPS16 calls will go via that stub, and there is no benefit | |
7448 | // to having a MIPS16 entry. And in the case of call_stub a | |
7449 | // standard entry actually has to be used as the stub ends with a J | |
7450 | // instruction. | |
7451 | if (this->target_->is_output_newabi() | |
7452 | || mips_sym->has_mips16_call_stub() | |
7453 | || mips_sym->has_mips16_call_fp_stub()) | |
7454 | { | |
7455 | mips_sym->set_needs_mips_plt(true); | |
7456 | mips_sym->set_needs_comp_plt(false); | |
7457 | } | |
7458 | ||
7459 | // Otherwise, if there are no direct calls to the function, we | |
7460 | // have a free choice of whether to use standard or compressed | |
7461 | // entries. Prefer microMIPS entries if the object is known to | |
7462 | // contain microMIPS code, so that it becomes possible to create | |
7463 | // pure microMIPS binaries. Prefer standard entries otherwise, | |
7464 | // because MIPS16 ones are no smaller and are usually slower. | |
7465 | if (!mips_sym->needs_mips_plt() && !mips_sym->needs_comp_plt()) | |
7466 | { | |
7467 | if (this->target_->is_output_micromips()) | |
7468 | mips_sym->set_needs_comp_plt(true); | |
7469 | else | |
7470 | mips_sym->set_needs_mips_plt(true); | |
7471 | } | |
7472 | ||
7473 | if (mips_sym->needs_mips_plt()) | |
7474 | { | |
7475 | mips_sym->set_mips_plt_offset(this->plt_mips_offset_); | |
7476 | this->plt_mips_offset_ += plt_mips_entry_size; | |
7477 | } | |
7478 | if (mips_sym->needs_comp_plt()) | |
7479 | { | |
7480 | mips_sym->set_comp_plt_offset(this->plt_comp_offset_); | |
7481 | this->plt_comp_offset_ += plt_comp_entry_size; | |
7482 | } | |
7483 | } | |
7484 | ||
7485 | // Figure out the size of the PLT header if we know that we are using it. | |
7486 | if (this->plt_mips_offset_ + this->plt_comp_offset_ != 0) | |
7487 | this->plt_header_size_ = this->get_plt_header_size(); | |
7488 | } | |
7489 | ||
7490 | // Write out the PLT. This uses the hand-coded instructions above, | |
7491 | // and adjusts them as needed. | |
7492 | ||
7493 | template<int size, bool big_endian> | |
7494 | void | |
7495 | Mips_output_data_plt<size, big_endian>::do_write(Output_file* of) | |
7496 | { | |
7497 | const off_t offset = this->offset(); | |
7498 | const section_size_type oview_size = | |
7499 | convert_to_section_size_type(this->data_size()); | |
7500 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
7501 | ||
7502 | const off_t gotplt_file_offset = this->got_plt_->offset(); | |
7503 | const section_size_type gotplt_size = | |
7504 | convert_to_section_size_type(this->got_plt_->data_size()); | |
7505 | unsigned char* const gotplt_view = of->get_output_view(gotplt_file_offset, | |
7506 | gotplt_size); | |
7507 | unsigned char* pov = oview; | |
7508 | ||
7509 | Mips_address plt_address = this->address(); | |
7510 | ||
7511 | // Calculate the address of .got.plt. | |
7512 | Mips_address gotplt_addr = this->got_plt_->address(); | |
7513 | Mips_address gotplt_addr_high = ((gotplt_addr + 0x8000) >> 16) & 0xffff; | |
7514 | Mips_address gotplt_addr_low = gotplt_addr & 0xffff; | |
7515 | ||
7516 | // The PLT sequence is not safe for N64 if .got.plt's address can | |
7517 | // not be loaded in two instructions. | |
7518 | gold_assert((gotplt_addr & ~(Mips_address) 0x7fffffff) == 0 | |
7519 | || ~(gotplt_addr | 0x7fffffff) == 0); | |
7520 | ||
7521 | // Write the PLT header. | |
7522 | const uint32_t* plt0_entry = this->get_plt_header_entry(); | |
7523 | if (plt0_entry == plt0_entry_micromips_o32) | |
7524 | { | |
7525 | // Write microMIPS PLT header. | |
7526 | gold_assert(gotplt_addr % 4 == 0); | |
7527 | ||
7528 | Mips_address gotpc_offset = gotplt_addr - ((plt_address | 3) ^ 3); | |
7529 | ||
7530 | // ADDIUPC has a span of +/-16MB, check we're in range. | |
7531 | if (gotpc_offset + 0x1000000 >= 0x2000000) | |
7532 | { | |
7533 | gold_error(_(".got.plt offset of %ld from .plt beyond the range of " | |
7534 | "ADDIUPC"), (long)gotpc_offset); | |
7535 | return; | |
7536 | } | |
7537 | ||
7538 | elfcpp::Swap<16, big_endian>::writeval(pov, | |
7539 | plt0_entry[0] | ((gotpc_offset >> 18) & 0x7f)); | |
7540 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, | |
7541 | (gotpc_offset >> 2) & 0xffff); | |
7542 | pov += 4; | |
7543 | for (unsigned int i = 2; | |
7544 | i < (sizeof(plt0_entry_micromips_o32) | |
7545 | / sizeof(plt0_entry_micromips_o32[0])); | |
7546 | i++) | |
7547 | { | |
7548 | elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[i]); | |
7549 | pov += 2; | |
7550 | } | |
7551 | } | |
7552 | else if (plt0_entry == plt0_entry_micromips32_o32) | |
7553 | { | |
7554 | // Write microMIPS PLT header in insn32 mode. | |
7555 | elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[0]); | |
7556 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, gotplt_addr_high); | |
7557 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, plt0_entry[2]); | |
7558 | elfcpp::Swap<16, big_endian>::writeval(pov + 6, gotplt_addr_low); | |
7559 | elfcpp::Swap<16, big_endian>::writeval(pov + 8, plt0_entry[4]); | |
7560 | elfcpp::Swap<16, big_endian>::writeval(pov + 10, gotplt_addr_low); | |
7561 | pov += 12; | |
7562 | for (unsigned int i = 6; | |
7563 | i < (sizeof(plt0_entry_micromips32_o32) | |
7564 | / sizeof(plt0_entry_micromips32_o32[0])); | |
7565 | i++) | |
7566 | { | |
7567 | elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[i]); | |
7568 | pov += 2; | |
7569 | } | |
7570 | } | |
7571 | else | |
7572 | { | |
7573 | // Write standard PLT header. | |
7574 | elfcpp::Swap<32, big_endian>::writeval(pov, | |
7575 | plt0_entry[0] | gotplt_addr_high); | |
7576 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, | |
7577 | plt0_entry[1] | gotplt_addr_low); | |
7578 | elfcpp::Swap<32, big_endian>::writeval(pov + 8, | |
7579 | plt0_entry[2] | gotplt_addr_low); | |
7580 | pov += 12; | |
7581 | for (int i = 3; i < 8; i++) | |
7582 | { | |
7583 | elfcpp::Swap<32, big_endian>::writeval(pov, plt0_entry[i]); | |
7584 | pov += 4; | |
7585 | } | |
7586 | } | |
7587 | ||
7588 | ||
7589 | unsigned char* gotplt_pov = gotplt_view; | |
7590 | unsigned int got_entry_size = size/8; // TODO(sasa): MIPS_ELF_GOT_SIZE | |
7591 | ||
7592 | // The first two entries in .got.plt are reserved. | |
7593 | elfcpp::Swap<size, big_endian>::writeval(gotplt_pov, 0); | |
7594 | elfcpp::Swap<size, big_endian>::writeval(gotplt_pov + got_entry_size, 0); | |
7595 | ||
7596 | unsigned int gotplt_offset = 2 * got_entry_size; | |
7597 | gotplt_pov += 2 * got_entry_size; | |
7598 | ||
7599 | // Calculate the address of the PLT header. | |
7600 | Mips_address header_address = (plt_address | |
7601 | + (this->is_plt_header_compressed() ? 1 : 0)); | |
7602 | ||
7603 | // Initialize compressed PLT area view. | |
7604 | unsigned char* pov2 = pov + this->plt_mips_offset_; | |
7605 | ||
7606 | // Write the PLT entries. | |
7607 | for (typename std::vector<Mips_symbol<size>*>::const_iterator | |
7608 | p = this->symbols_.begin(); | |
7609 | p != this->symbols_.end(); | |
7610 | ++p, gotplt_pov += got_entry_size, gotplt_offset += got_entry_size) | |
7611 | { | |
7612 | Mips_symbol<size>* mips_sym = *p; | |
7613 | ||
7614 | // Calculate the address of the .got.plt entry. | |
7615 | uint32_t gotplt_entry_addr = (gotplt_addr + gotplt_offset); | |
7616 | uint32_t gotplt_entry_addr_hi = (((gotplt_entry_addr + 0x8000) >> 16) | |
7617 | & 0xffff); | |
7618 | uint32_t gotplt_entry_addr_lo = gotplt_entry_addr & 0xffff; | |
7619 | ||
7620 | // Initially point the .got.plt entry at the PLT header. | |
7621 | if (this->target_->is_output_n64()) | |
7622 | elfcpp::Swap<64, big_endian>::writeval(gotplt_pov, header_address); | |
7623 | else | |
7624 | elfcpp::Swap<32, big_endian>::writeval(gotplt_pov, header_address); | |
7625 | ||
7626 | // Now handle the PLT itself. First the standard entry. | |
7627 | if (mips_sym->has_mips_plt_offset()) | |
7628 | { | |
7629 | // Pick the load opcode (LW or LD). | |
7630 | uint64_t load = this->target_->is_output_n64() ? 0xdc000000 | |
7631 | : 0x8c000000; | |
7632 | ||
f5b11759 VR |
7633 | const uint32_t* entry = this->target_->is_output_r6() ? plt_entry_r6 |
7634 | : plt_entry; | |
7635 | ||
9810d34d SS |
7636 | // Fill in the PLT entry itself. |
7637 | elfcpp::Swap<32, big_endian>::writeval(pov, | |
f5b11759 | 7638 | entry[0] | gotplt_entry_addr_hi); |
9810d34d | 7639 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, |
f5b11759 VR |
7640 | entry[1] | gotplt_entry_addr_lo | load); |
7641 | elfcpp::Swap<32, big_endian>::writeval(pov + 8, entry[2]); | |
9810d34d | 7642 | elfcpp::Swap<32, big_endian>::writeval(pov + 12, |
f5b11759 | 7643 | entry[3] | gotplt_entry_addr_lo); |
9810d34d SS |
7644 | pov += 16; |
7645 | } | |
7646 | ||
7647 | // Now the compressed entry. They come after any standard ones. | |
7648 | if (mips_sym->has_comp_plt_offset()) | |
7649 | { | |
7650 | if (!this->target_->is_output_micromips()) | |
7651 | { | |
7652 | // Write MIPS16 PLT entry. | |
7653 | const uint32_t* plt_entry = plt_entry_mips16_o32; | |
7654 | ||
7655 | elfcpp::Swap<16, big_endian>::writeval(pov2, plt_entry[0]); | |
7656 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 2, plt_entry[1]); | |
7657 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]); | |
7658 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, plt_entry[3]); | |
7659 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]); | |
7660 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]); | |
7661 | elfcpp::Swap<32, big_endian>::writeval(pov2 + 12, | |
7662 | gotplt_entry_addr); | |
7663 | pov2 += 16; | |
7664 | } | |
7665 | else if (this->target_->use_32bit_micromips_instructions()) | |
7666 | { | |
7667 | // Write microMIPS PLT entry in insn32 mode. | |
7668 | const uint32_t* plt_entry = plt_entry_micromips32_o32; | |
7669 | ||
7670 | elfcpp::Swap<16, big_endian>::writeval(pov2, plt_entry[0]); | |
7671 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 2, | |
7672 | gotplt_entry_addr_hi); | |
7673 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]); | |
7674 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, | |
7675 | gotplt_entry_addr_lo); | |
7676 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]); | |
7677 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]); | |
7678 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 12, plt_entry[6]); | |
7679 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 14, | |
7680 | gotplt_entry_addr_lo); | |
7681 | pov2 += 16; | |
7682 | } | |
7683 | else | |
7684 | { | |
7685 | // Write microMIPS PLT entry. | |
7686 | const uint32_t* plt_entry = plt_entry_micromips_o32; | |
7687 | ||
7688 | gold_assert(gotplt_entry_addr % 4 == 0); | |
7689 | ||
7690 | Mips_address loc_address = plt_address + pov2 - oview; | |
7691 | int gotpc_offset = gotplt_entry_addr - ((loc_address | 3) ^ 3); | |
7692 | ||
7693 | // ADDIUPC has a span of +/-16MB, check we're in range. | |
7694 | if (gotpc_offset + 0x1000000 >= 0x2000000) | |
7695 | { | |
7696 | gold_error(_(".got.plt offset of %ld from .plt beyond the " | |
7697 | "range of ADDIUPC"), (long)gotpc_offset); | |
7698 | return; | |
7699 | } | |
7700 | ||
7701 | elfcpp::Swap<16, big_endian>::writeval(pov2, | |
7702 | plt_entry[0] | ((gotpc_offset >> 18) & 0x7f)); | |
7703 | elfcpp::Swap<16, big_endian>::writeval( | |
7704 | pov2 + 2, (gotpc_offset >> 2) & 0xffff); | |
7705 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]); | |
7706 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, plt_entry[3]); | |
7707 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]); | |
7708 | elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]); | |
7709 | pov2 += 12; | |
7710 | } | |
7711 | } | |
7712 | } | |
7713 | ||
7714 | // Check the number of bytes written for standard entries. | |
7715 | gold_assert(static_cast<section_size_type>( | |
7716 | pov - oview - this->plt_header_size_) == this->plt_mips_offset_); | |
7717 | // Check the number of bytes written for compressed entries. | |
7718 | gold_assert((static_cast<section_size_type>(pov2 - pov) | |
7719 | == this->plt_comp_offset_)); | |
7720 | // Check the total number of bytes written. | |
7721 | gold_assert(static_cast<section_size_type>(pov2 - oview) == oview_size); | |
7722 | ||
7723 | gold_assert(static_cast<section_size_type>(gotplt_pov - gotplt_view) | |
7724 | == gotplt_size); | |
7725 | ||
7726 | of->write_output_view(offset, oview_size, oview); | |
7727 | of->write_output_view(gotplt_file_offset, gotplt_size, gotplt_view); | |
7728 | } | |
7729 | ||
7730 | // Mips_output_data_mips_stubs methods. | |
7731 | ||
7732 | // The format of the lazy binding stub when dynamic symbol count is less than | |
7733 | // 64K, dynamic symbol index is less than 32K, and ABI is not N64. | |
7734 | template<int size, bool big_endian> | |
7735 | const uint32_t | |
7736 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_1[4] = | |
7737 | { | |
7738 | 0x8f998010, // lw t9,0x8010(gp) | |
40fc1451 | 7739 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7740 | 0x0320f809, // jalr t9,ra |
7741 | 0x24180000 // addiu t8,zero,DYN_INDEX sign extended | |
7742 | }; | |
7743 | ||
7744 | // The format of the lazy binding stub when dynamic symbol count is less than | |
7745 | // 64K, dynamic symbol index is less than 32K, and ABI is N64. | |
7746 | template<int size, bool big_endian> | |
7747 | const uint32_t | |
7748 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_1_n64[4] = | |
7749 | { | |
7750 | 0xdf998010, // ld t9,0x8010(gp) | |
40fc1451 | 7751 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7752 | 0x0320f809, // jalr t9,ra |
7753 | 0x64180000 // daddiu t8,zero,DYN_INDEX sign extended | |
7754 | }; | |
7755 | ||
7756 | // The format of the lazy binding stub when dynamic symbol count is less than | |
7757 | // 64K, dynamic symbol index is between 32K and 64K, and ABI is not N64. | |
7758 | template<int size, bool big_endian> | |
7759 | const uint32_t | |
7760 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_2[4] = | |
7761 | { | |
7762 | 0x8f998010, // lw t9,0x8010(gp) | |
40fc1451 | 7763 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7764 | 0x0320f809, // jalr t9,ra |
7765 | 0x34180000 // ori t8,zero,DYN_INDEX unsigned | |
7766 | }; | |
7767 | ||
7768 | // The format of the lazy binding stub when dynamic symbol count is less than | |
7769 | // 64K, dynamic symbol index is between 32K and 64K, and ABI is N64. | |
7770 | template<int size, bool big_endian> | |
7771 | const uint32_t | |
7772 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_2_n64[4] = | |
7773 | { | |
7774 | 0xdf998010, // ld t9,0x8010(gp) | |
40fc1451 | 7775 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7776 | 0x0320f809, // jalr t9,ra |
7777 | 0x34180000 // ori t8,zero,DYN_INDEX unsigned | |
7778 | }; | |
7779 | ||
7780 | // The format of the lazy binding stub when dynamic symbol count is greater than | |
7781 | // 64K, and ABI is not N64. | |
7782 | template<int size, bool big_endian> | |
7783 | const uint32_t Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_big[5] = | |
7784 | { | |
7785 | 0x8f998010, // lw t9,0x8010(gp) | |
40fc1451 | 7786 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7787 | 0x3c180000, // lui t8,DYN_INDEX |
7788 | 0x0320f809, // jalr t9,ra | |
7789 | 0x37180000 // ori t8,t8,DYN_INDEX | |
7790 | }; | |
7791 | ||
7792 | // The format of the lazy binding stub when dynamic symbol count is greater than | |
7793 | // 64K, and ABI is N64. | |
7794 | template<int size, bool big_endian> | |
7795 | const uint32_t | |
7796 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_big_n64[5] = | |
7797 | { | |
7798 | 0xdf998010, // ld t9,0x8010(gp) | |
40fc1451 | 7799 | 0x03e07825, // or t7,ra,zero |
9810d34d SS |
7800 | 0x3c180000, // lui t8,DYN_INDEX |
7801 | 0x0320f809, // jalr t9,ra | |
7802 | 0x37180000 // ori t8,t8,DYN_INDEX | |
7803 | }; | |
7804 | ||
7805 | // microMIPS stubs. | |
7806 | ||
7807 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7808 | // less than 64K, dynamic symbol index is less than 32K, and ABI is not N64. | |
7809 | template<int size, bool big_endian> | |
7810 | const uint32_t | |
7811 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_normal_1[] = | |
7812 | { | |
7813 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
7814 | 0x0dff, // move t7,ra | |
7815 | 0x45d9, // jalr t9 | |
7816 | 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended | |
7817 | }; | |
7818 | ||
7819 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7820 | // less than 64K, dynamic symbol index is less than 32K, and ABI is N64. | |
7821 | template<int size, bool big_endian> | |
7822 | const uint32_t | |
7823 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7824 | lazy_stub_micromips_normal_1_n64[] = | |
7825 | { | |
7826 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
7827 | 0x0dff, // move t7,ra | |
7828 | 0x45d9, // jalr t9 | |
7829 | 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended | |
7830 | }; | |
7831 | ||
7832 | // The format of the microMIPS lazy binding stub when dynamic symbol | |
7833 | // count is less than 64K, dynamic symbol index is between 32K and 64K, | |
7834 | // and ABI is not N64. | |
7835 | template<int size, bool big_endian> | |
7836 | const uint32_t | |
7837 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_normal_2[] = | |
7838 | { | |
7839 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
7840 | 0x0dff, // move t7,ra | |
7841 | 0x45d9, // jalr t9 | |
7842 | 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned | |
7843 | }; | |
7844 | ||
7845 | // The format of the microMIPS lazy binding stub when dynamic symbol | |
7846 | // count is less than 64K, dynamic symbol index is between 32K and 64K, | |
7847 | // and ABI is N64. | |
7848 | template<int size, bool big_endian> | |
7849 | const uint32_t | |
7850 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7851 | lazy_stub_micromips_normal_2_n64[] = | |
7852 | { | |
7853 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
7854 | 0x0dff, // move t7,ra | |
7855 | 0x45d9, // jalr t9 | |
7856 | 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned | |
7857 | }; | |
7858 | ||
7859 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7860 | // greater than 64K, and ABI is not N64. | |
7861 | template<int size, bool big_endian> | |
7862 | const uint32_t | |
7863 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_big[] = | |
7864 | { | |
7865 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
7866 | 0x0dff, // move t7,ra | |
7867 | 0x41b8, 0x0000, // lui t8,DYN_INDEX | |
7868 | 0x45d9, // jalr t9 | |
7869 | 0x5318, 0x0000 // ori t8,t8,DYN_INDEX | |
7870 | }; | |
7871 | ||
7872 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7873 | // greater than 64K, and ABI is N64. | |
7874 | template<int size, bool big_endian> | |
7875 | const uint32_t | |
7876 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_big_n64[] = | |
7877 | { | |
7878 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
7879 | 0x0dff, // move t7,ra | |
7880 | 0x41b8, 0x0000, // lui t8,DYN_INDEX | |
7881 | 0x45d9, // jalr t9 | |
7882 | 0x5318, 0x0000 // ori t8,t8,DYN_INDEX | |
7883 | }; | |
7884 | ||
7885 | // 32-bit microMIPS stubs. | |
7886 | ||
7887 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7888 | // less than 64K, dynamic symbol index is less than 32K, ABI is not N64, and we | |
7889 | // can use only 32-bit instructions. | |
7890 | template<int size, bool big_endian> | |
7891 | const uint32_t | |
7892 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7893 | lazy_stub_micromips32_normal_1[] = | |
7894 | { | |
7895 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
40fc1451 | 7896 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7897 | 0x03f9, 0x0f3c, // jalr ra,t9 |
7898 | 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended | |
7899 | }; | |
7900 | ||
7901 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7902 | // less than 64K, dynamic symbol index is less than 32K, ABI is N64, and we can | |
7903 | // use only 32-bit instructions. | |
7904 | template<int size, bool big_endian> | |
7905 | const uint32_t | |
7906 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7907 | lazy_stub_micromips32_normal_1_n64[] = | |
7908 | { | |
7909 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
40fc1451 | 7910 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7911 | 0x03f9, 0x0f3c, // jalr ra,t9 |
7912 | 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended | |
7913 | }; | |
7914 | ||
7915 | // The format of the microMIPS lazy binding stub when dynamic symbol | |
7916 | // count is less than 64K, dynamic symbol index is between 32K and 64K, | |
7917 | // ABI is not N64, and we can use only 32-bit instructions. | |
7918 | template<int size, bool big_endian> | |
7919 | const uint32_t | |
7920 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7921 | lazy_stub_micromips32_normal_2[] = | |
7922 | { | |
7923 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
40fc1451 | 7924 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7925 | 0x03f9, 0x0f3c, // jalr ra,t9 |
7926 | 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned | |
7927 | }; | |
7928 | ||
7929 | // The format of the microMIPS lazy binding stub when dynamic symbol | |
7930 | // count is less than 64K, dynamic symbol index is between 32K and 64K, | |
7931 | // ABI is N64, and we can use only 32-bit instructions. | |
7932 | template<int size, bool big_endian> | |
7933 | const uint32_t | |
7934 | Mips_output_data_mips_stubs<size, big_endian>:: | |
7935 | lazy_stub_micromips32_normal_2_n64[] = | |
7936 | { | |
7937 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
40fc1451 | 7938 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7939 | 0x03f9, 0x0f3c, // jalr ra,t9 |
7940 | 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned | |
7941 | }; | |
7942 | ||
7943 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7944 | // greater than 64K, ABI is not N64, and we can use only 32-bit instructions. | |
7945 | template<int size, bool big_endian> | |
7946 | const uint32_t | |
7947 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips32_big[] = | |
7948 | { | |
7949 | 0xff3c, 0x8010, // lw t9,0x8010(gp) | |
40fc1451 | 7950 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7951 | 0x41b8, 0x0000, // lui t8,DYN_INDEX |
7952 | 0x03f9, 0x0f3c, // jalr ra,t9 | |
7953 | 0x5318, 0x0000 // ori t8,t8,DYN_INDEX | |
7954 | }; | |
7955 | ||
7956 | // The format of the microMIPS lazy binding stub when dynamic symbol count is | |
7957 | // greater than 64K, ABI is N64, and we can use only 32-bit instructions. | |
7958 | template<int size, bool big_endian> | |
7959 | const uint32_t | |
7960 | Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips32_big_n64[] = | |
7961 | { | |
7962 | 0xdf3c, 0x8010, // ld t9,0x8010(gp) | |
40fc1451 | 7963 | 0x001f, 0x7a90, // or t7,ra,zero |
9810d34d SS |
7964 | 0x41b8, 0x0000, // lui t8,DYN_INDEX |
7965 | 0x03f9, 0x0f3c, // jalr ra,t9 | |
7966 | 0x5318, 0x0000 // ori t8,t8,DYN_INDEX | |
7967 | }; | |
7968 | ||
7969 | // Create entry for a symbol. | |
7970 | ||
7971 | template<int size, bool big_endian> | |
7972 | void | |
7973 | Mips_output_data_mips_stubs<size, big_endian>::make_entry( | |
7974 | Mips_symbol<size>* gsym) | |
7975 | { | |
7976 | if (!gsym->has_lazy_stub() && !gsym->has_plt_offset()) | |
7977 | { | |
7978 | this->symbols_.insert(gsym); | |
7979 | gsym->set_has_lazy_stub(true); | |
7980 | } | |
7981 | } | |
7982 | ||
7983 | // Remove entry for a symbol. | |
7984 | ||
7985 | template<int size, bool big_endian> | |
7986 | void | |
7987 | Mips_output_data_mips_stubs<size, big_endian>::remove_entry( | |
7988 | Mips_symbol<size>* gsym) | |
7989 | { | |
7990 | if (gsym->has_lazy_stub()) | |
7991 | { | |
7992 | this->symbols_.erase(gsym); | |
7993 | gsym->set_has_lazy_stub(false); | |
7994 | } | |
7995 | } | |
7996 | ||
7997 | // Set stub offsets for symbols. This method expects that the number of | |
7998 | // entries in dynamic symbol table is set. | |
7999 | ||
8000 | template<int size, bool big_endian> | |
8001 | void | |
8002 | Mips_output_data_mips_stubs<size, big_endian>::set_lazy_stub_offsets() | |
8003 | { | |
8004 | gold_assert(this->dynsym_count_ != -1U); | |
8005 | ||
8006 | if (this->stub_offsets_are_set_) | |
8007 | return; | |
8008 | ||
8009 | unsigned int stub_size = this->stub_size(); | |
8010 | unsigned int offset = 0; | |
15eb1beb | 8011 | for (typename Mips_stubs_entry_set::const_iterator |
9810d34d SS |
8012 | p = this->symbols_.begin(); |
8013 | p != this->symbols_.end(); | |
8014 | ++p, offset += stub_size) | |
8015 | { | |
8016 | Mips_symbol<size>* mips_sym = *p; | |
8017 | mips_sym->set_lazy_stub_offset(offset); | |
8018 | } | |
8019 | this->stub_offsets_are_set_ = true; | |
8020 | } | |
8021 | ||
8022 | template<int size, bool big_endian> | |
8023 | void | |
8024 | Mips_output_data_mips_stubs<size, big_endian>::set_needs_dynsym_value() | |
8025 | { | |
15eb1beb | 8026 | for (typename Mips_stubs_entry_set::const_iterator |
9810d34d SS |
8027 | p = this->symbols_.begin(); p != this->symbols_.end(); ++p) |
8028 | { | |
8029 | Mips_symbol<size>* sym = *p; | |
8030 | if (sym->is_from_dynobj()) | |
8031 | sym->set_needs_dynsym_value(); | |
8032 | } | |
8033 | } | |
8034 | ||
8035 | // Write out the .MIPS.stubs. This uses the hand-coded instructions and | |
8036 | // adjusts them as needed. | |
8037 | ||
8038 | template<int size, bool big_endian> | |
8039 | void | |
8040 | Mips_output_data_mips_stubs<size, big_endian>::do_write(Output_file* of) | |
8041 | { | |
8042 | const off_t offset = this->offset(); | |
8043 | const section_size_type oview_size = | |
8044 | convert_to_section_size_type(this->data_size()); | |
8045 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
8046 | ||
8047 | bool big_stub = this->dynsym_count_ > 0x10000; | |
8048 | ||
8049 | unsigned char* pov = oview; | |
15eb1beb | 8050 | for (typename Mips_stubs_entry_set::const_iterator |
9810d34d SS |
8051 | p = this->symbols_.begin(); p != this->symbols_.end(); ++p) |
8052 | { | |
8053 | Mips_symbol<size>* sym = *p; | |
8054 | const uint32_t* lazy_stub; | |
8055 | bool n64 = this->target_->is_output_n64(); | |
8056 | ||
8057 | if (!this->target_->is_output_micromips()) | |
8058 | { | |
8059 | // Write standard (non-microMIPS) stub. | |
8060 | if (!big_stub) | |
8061 | { | |
8062 | if (sym->dynsym_index() & ~0x7fff) | |
8063 | // Dynsym index is between 32K and 64K. | |
8064 | lazy_stub = n64 ? lazy_stub_normal_2_n64 : lazy_stub_normal_2; | |
8065 | else | |
8066 | // Dynsym index is less than 32K. | |
8067 | lazy_stub = n64 ? lazy_stub_normal_1_n64 : lazy_stub_normal_1; | |
8068 | } | |
8069 | else | |
8070 | lazy_stub = n64 ? lazy_stub_big_n64 : lazy_stub_big; | |
8071 | ||
8072 | unsigned int i = 0; | |
8073 | elfcpp::Swap<32, big_endian>::writeval(pov, lazy_stub[i]); | |
8074 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, lazy_stub[i + 1]); | |
8075 | pov += 8; | |
8076 | ||
8077 | i += 2; | |
8078 | if (big_stub) | |
8079 | { | |
8080 | // LUI instruction of the big stub. Paste high 16 bits of the | |
8081 | // dynsym index. | |
8082 | elfcpp::Swap<32, big_endian>::writeval(pov, | |
8083 | lazy_stub[i] | ((sym->dynsym_index() >> 16) & 0x7fff)); | |
8084 | pov += 4; | |
8085 | i += 1; | |
8086 | } | |
8087 | elfcpp::Swap<32, big_endian>::writeval(pov, lazy_stub[i]); | |
8088 | // Last stub instruction. Paste low 16 bits of the dynsym index. | |
8089 | elfcpp::Swap<32, big_endian>::writeval(pov + 4, | |
8090 | lazy_stub[i + 1] | (sym->dynsym_index() & 0xffff)); | |
8091 | pov += 8; | |
8092 | } | |
8093 | else if (this->target_->use_32bit_micromips_instructions()) | |
8094 | { | |
8095 | // Write microMIPS stub in insn32 mode. | |
8096 | if (!big_stub) | |
8097 | { | |
8098 | if (sym->dynsym_index() & ~0x7fff) | |
8099 | // Dynsym index is between 32K and 64K. | |
8100 | lazy_stub = n64 ? lazy_stub_micromips32_normal_2_n64 | |
8101 | : lazy_stub_micromips32_normal_2; | |
8102 | else | |
8103 | // Dynsym index is less than 32K. | |
8104 | lazy_stub = n64 ? lazy_stub_micromips32_normal_1_n64 | |
8105 | : lazy_stub_micromips32_normal_1; | |
8106 | } | |
8107 | else | |
8108 | lazy_stub = n64 ? lazy_stub_micromips32_big_n64 | |
8109 | : lazy_stub_micromips32_big; | |
8110 | ||
8111 | unsigned int i = 0; | |
8112 | // First stub instruction. We emit 32-bit microMIPS instructions by | |
8113 | // emitting two 16-bit parts because on microMIPS the 16-bit part of | |
8114 | // the instruction where the opcode is must always come first, for | |
8115 | // both little and big endian. | |
8116 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
8117 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]); | |
8118 | // Second stub instruction. | |
8119 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]); | |
8120 | elfcpp::Swap<16, big_endian>::writeval(pov + 6, lazy_stub[i + 3]); | |
8121 | pov += 8; | |
8122 | i += 4; | |
8123 | if (big_stub) | |
8124 | { | |
8125 | // LUI instruction of the big stub. Paste high 16 bits of the | |
8126 | // dynsym index. | |
8127 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
8128 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, | |
8129 | (sym->dynsym_index() >> 16) & 0x7fff); | |
8130 | pov += 4; | |
8131 | i += 2; | |
8132 | } | |
8133 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
8134 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]); | |
8135 | // Last stub instruction. Paste low 16 bits of the dynsym index. | |
8136 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]); | |
8137 | elfcpp::Swap<16, big_endian>::writeval(pov + 6, | |
8138 | sym->dynsym_index() & 0xffff); | |
8139 | pov += 8; | |
8140 | } | |
8141 | else | |
8142 | { | |
8143 | // Write microMIPS stub. | |
8144 | if (!big_stub) | |
8145 | { | |
8146 | if (sym->dynsym_index() & ~0x7fff) | |
8147 | // Dynsym index is between 32K and 64K. | |
8148 | lazy_stub = n64 ? lazy_stub_micromips_normal_2_n64 | |
8149 | : lazy_stub_micromips_normal_2; | |
8150 | else | |
8151 | // Dynsym index is less than 32K. | |
8152 | lazy_stub = n64 ? lazy_stub_micromips_normal_1_n64 | |
8153 | : lazy_stub_micromips_normal_1; | |
8154 | } | |
8155 | else | |
8156 | lazy_stub = n64 ? lazy_stub_micromips_big_n64 | |
8157 | : lazy_stub_micromips_big; | |
8158 | ||
8159 | unsigned int i = 0; | |
8160 | // First stub instruction. We emit 32-bit microMIPS instructions by | |
8161 | // emitting two 16-bit parts because on microMIPS the 16-bit part of | |
8162 | // the instruction where the opcode is must always come first, for | |
8163 | // both little and big endian. | |
8164 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
8165 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]); | |
8166 | // Second stub instruction. | |
8167 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]); | |
8168 | pov += 6; | |
8169 | i += 3; | |
8170 | if (big_stub) | |
8171 | { | |
8172 | // LUI instruction of the big stub. Paste high 16 bits of the | |
8173 | // dynsym index. | |
8174 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
8175 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, | |
8176 | (sym->dynsym_index() >> 16) & 0x7fff); | |
8177 | pov += 4; | |
8178 | i += 2; | |
8179 | } | |
8180 | elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]); | |
8181 | // Last stub instruction. Paste low 16 bits of the dynsym index. | |
8182 | elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]); | |
8183 | elfcpp::Swap<16, big_endian>::writeval(pov + 4, | |
8184 | sym->dynsym_index() & 0xffff); | |
8185 | pov += 6; | |
8186 | } | |
8187 | } | |
8188 | ||
8189 | // We always allocate 20 bytes for every stub, because final dynsym count is | |
8190 | // not known in method do_finalize_sections. There are 4 unused bytes per | |
8191 | // stub if final dynsym count is less than 0x10000. | |
8192 | unsigned int used = pov - oview; | |
8193 | unsigned int unused = big_stub ? 0 : this->symbols_.size() * 4; | |
8194 | gold_assert(static_cast<section_size_type>(used + unused) == oview_size); | |
8195 | ||
8196 | // Fill the unused space with zeroes. | |
8197 | // TODO(sasa): Can we strip unused bytes during the relaxation? | |
8198 | if (unused > 0) | |
8199 | memset(pov, 0, unused); | |
8200 | ||
8201 | of->write_output_view(offset, oview_size, oview); | |
8202 | } | |
8203 | ||
8204 | // Mips_output_section_reginfo methods. | |
8205 | ||
8206 | template<int size, bool big_endian> | |
8207 | void | |
8208 | Mips_output_section_reginfo<size, big_endian>::do_write(Output_file* of) | |
8209 | { | |
8210 | off_t offset = this->offset(); | |
8211 | off_t data_size = this->data_size(); | |
8212 | ||
8213 | unsigned char* view = of->get_output_view(offset, data_size); | |
8214 | elfcpp::Swap<size, big_endian>::writeval(view, this->gprmask_); | |
8215 | elfcpp::Swap<size, big_endian>::writeval(view + 4, this->cprmask1_); | |
8216 | elfcpp::Swap<size, big_endian>::writeval(view + 8, this->cprmask2_); | |
8217 | elfcpp::Swap<size, big_endian>::writeval(view + 12, this->cprmask3_); | |
8218 | elfcpp::Swap<size, big_endian>::writeval(view + 16, this->cprmask4_); | |
8219 | // Write the gp value. | |
8220 | elfcpp::Swap<size, big_endian>::writeval(view + 20, | |
8221 | this->target_->gp_value()); | |
8222 | ||
8223 | of->write_output_view(offset, data_size, view); | |
8224 | } | |
8225 | ||
1728969e VR |
8226 | // Mips_output_section_options methods. |
8227 | ||
8228 | template<int size, bool big_endian> | |
8229 | void | |
8230 | Mips_output_section_options<size, big_endian>::do_write(Output_file* of) | |
8231 | { | |
8232 | off_t offset = this->offset(); | |
8233 | const section_size_type oview_size = | |
8234 | convert_to_section_size_type(this->data_size()); | |
8235 | unsigned char* view = of->get_output_view(offset, oview_size); | |
8236 | const unsigned char* end = view + oview_size; | |
8237 | ||
8238 | while (view + 8 <= end) | |
8239 | { | |
8240 | unsigned char kind = elfcpp::Swap<8, big_endian>::readval(view); | |
8241 | unsigned char sz = elfcpp::Swap<8, big_endian>::readval(view + 1); | |
8242 | if (sz < 8) | |
8243 | { | |
8244 | gold_error(_("Warning: bad `%s' option size %u smaller " | |
8245 | "than its header in output section"), | |
8246 | this->name(), sz); | |
8247 | break; | |
8248 | } | |
8249 | ||
8250 | // Only update ri_gp_value (GP register value) field of ODK_REGINFO entry. | |
8251 | if (this->target_->is_output_n64() && kind == elfcpp::ODK_REGINFO) | |
8252 | elfcpp::Swap<size, big_endian>::writeval(view + 32, | |
8253 | this->target_->gp_value()); | |
8254 | else if (kind == elfcpp::ODK_REGINFO) | |
8255 | elfcpp::Swap<size, big_endian>::writeval(view + 28, | |
8256 | this->target_->gp_value()); | |
8257 | ||
8258 | view += sz; | |
8259 | } | |
8260 | ||
8261 | of->write_output_view(offset, oview_size, view); | |
8262 | } | |
8263 | ||
b52717c0 VR |
8264 | // Mips_output_section_abiflags methods. |
8265 | ||
8266 | template<int size, bool big_endian> | |
8267 | void | |
8268 | Mips_output_section_abiflags<size, big_endian>::do_write(Output_file* of) | |
8269 | { | |
8270 | off_t offset = this->offset(); | |
8271 | off_t data_size = this->data_size(); | |
8272 | ||
8273 | unsigned char* view = of->get_output_view(offset, data_size); | |
8274 | elfcpp::Swap<16, big_endian>::writeval(view, this->abiflags_.version); | |
8275 | elfcpp::Swap<8, big_endian>::writeval(view + 2, this->abiflags_.isa_level); | |
8276 | elfcpp::Swap<8, big_endian>::writeval(view + 3, this->abiflags_.isa_rev); | |
8277 | elfcpp::Swap<8, big_endian>::writeval(view + 4, this->abiflags_.gpr_size); | |
8278 | elfcpp::Swap<8, big_endian>::writeval(view + 5, this->abiflags_.cpr1_size); | |
8279 | elfcpp::Swap<8, big_endian>::writeval(view + 6, this->abiflags_.cpr2_size); | |
8280 | elfcpp::Swap<8, big_endian>::writeval(view + 7, this->abiflags_.fp_abi); | |
8281 | elfcpp::Swap<32, big_endian>::writeval(view + 8, this->abiflags_.isa_ext); | |
8282 | elfcpp::Swap<32, big_endian>::writeval(view + 12, this->abiflags_.ases); | |
8283 | elfcpp::Swap<32, big_endian>::writeval(view + 16, this->abiflags_.flags1); | |
8284 | elfcpp::Swap<32, big_endian>::writeval(view + 20, this->abiflags_.flags2); | |
8285 | ||
8286 | of->write_output_view(offset, data_size, view); | |
8287 | } | |
8288 | ||
9810d34d SS |
8289 | // Mips_copy_relocs methods. |
8290 | ||
8291 | // Emit any saved relocs. | |
8292 | ||
8293 | template<int sh_type, int size, bool big_endian> | |
8294 | void | |
8295 | Mips_copy_relocs<sh_type, size, big_endian>::emit_mips( | |
8296 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section, | |
8297 | Symbol_table* symtab, Layout* layout, Target_mips<size, big_endian>* target) | |
8298 | { | |
8299 | for (typename Copy_relocs<sh_type, size, big_endian>:: | |
8300 | Copy_reloc_entries::iterator p = this->entries_.begin(); | |
8301 | p != this->entries_.end(); | |
8302 | ++p) | |
8303 | emit_entry(*p, reloc_section, symtab, layout, target); | |
8304 | ||
8305 | // We no longer need the saved information. | |
8306 | this->entries_.clear(); | |
8307 | } | |
8308 | ||
8309 | // Emit the reloc if appropriate. | |
8310 | ||
8311 | template<int sh_type, int size, bool big_endian> | |
8312 | void | |
8313 | Mips_copy_relocs<sh_type, size, big_endian>::emit_entry( | |
8314 | Copy_reloc_entry& entry, | |
8315 | Output_data_reloc<sh_type, true, size, big_endian>* reloc_section, | |
8316 | Symbol_table* symtab, Layout* layout, Target_mips<size, big_endian>* target) | |
8317 | { | |
8318 | // If the symbol is no longer defined in a dynamic object, then we | |
8319 | // emitted a COPY relocation, and we do not want to emit this | |
8320 | // dynamic relocation. | |
8321 | if (!entry.sym_->is_from_dynobj()) | |
8322 | return; | |
8323 | ||
8324 | bool can_make_dynamic = (entry.reloc_type_ == elfcpp::R_MIPS_32 | |
8325 | || entry.reloc_type_ == elfcpp::R_MIPS_REL32 | |
8326 | || entry.reloc_type_ == elfcpp::R_MIPS_64); | |
8327 | ||
8328 | Mips_symbol<size>* sym = Mips_symbol<size>::as_mips_sym(entry.sym_); | |
8329 | if (can_make_dynamic && !sym->has_static_relocs()) | |
8330 | { | |
8331 | Mips_relobj<size, big_endian>* object = | |
8332 | Mips_relobj<size, big_endian>::as_mips_relobj(entry.relobj_); | |
8333 | target->got_section(symtab, layout)->record_global_got_symbol( | |
8334 | sym, object, entry.reloc_type_, true, false); | |
8335 | if (!symbol_references_local(sym, sym->should_add_dynsym_entry(symtab))) | |
8336 | target->rel_dyn_section(layout)->add_global(sym, elfcpp::R_MIPS_REL32, | |
8337 | entry.output_section_, entry.relobj_, entry.shndx_, entry.address_); | |
8338 | else | |
8339 | target->rel_dyn_section(layout)->add_symbolless_global_addend( | |
8340 | sym, elfcpp::R_MIPS_REL32, entry.output_section_, entry.relobj_, | |
8341 | entry.shndx_, entry.address_); | |
8342 | } | |
8343 | else | |
8344 | this->make_copy_reloc(symtab, layout, | |
8345 | static_cast<Sized_symbol<size>*>(entry.sym_), | |
6eeb0170 | 8346 | entry.relobj_, |
9810d34d SS |
8347 | reloc_section); |
8348 | } | |
8349 | ||
8350 | // Target_mips methods. | |
8351 | ||
8352 | // Return the value to use for a dynamic symbol which requires special | |
8353 | // treatment. This is how we support equality comparisons of function | |
8354 | // pointers across shared library boundaries, as described in the | |
8355 | // processor specific ABI supplement. | |
8356 | ||
8357 | template<int size, bool big_endian> | |
8358 | uint64_t | |
8359 | Target_mips<size, big_endian>::do_dynsym_value(const Symbol* gsym) const | |
8360 | { | |
8361 | uint64_t value = 0; | |
8362 | const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym); | |
8363 | ||
8364 | if (!mips_sym->has_lazy_stub()) | |
8365 | { | |
8366 | if (mips_sym->has_plt_offset()) | |
8367 | { | |
8368 | // We distinguish between PLT entries and lazy-binding stubs by | |
8369 | // giving the former an st_other value of STO_MIPS_PLT. Set the | |
8370 | // value to the stub address if there are any relocations in the | |
8371 | // binary where pointer equality matters. | |
8372 | if (mips_sym->pointer_equality_needed()) | |
8373 | { | |
8374 | // Prefer a standard MIPS PLT entry. | |
8375 | if (mips_sym->has_mips_plt_offset()) | |
8376 | value = this->plt_section()->mips_entry_address(mips_sym); | |
8377 | else | |
8378 | value = this->plt_section()->comp_entry_address(mips_sym) + 1; | |
8379 | } | |
8380 | else | |
8381 | value = 0; | |
8382 | } | |
8383 | } | |
8384 | else | |
8385 | { | |
8386 | // First, set stub offsets for symbols. This method expects that the | |
8387 | // number of entries in dynamic symbol table is set. | |
8388 | this->mips_stubs_section()->set_lazy_stub_offsets(); | |
8389 | ||
8390 | // The run-time linker uses the st_value field of the symbol | |
8391 | // to reset the global offset table entry for this external | |
8392 | // to its stub address when unlinking a shared object. | |
8393 | value = this->mips_stubs_section()->stub_address(mips_sym); | |
8394 | } | |
8395 | ||
8396 | if (mips_sym->has_mips16_fn_stub()) | |
8397 | { | |
8398 | // If we have a MIPS16 function with a stub, the dynamic symbol must | |
8399 | // refer to the stub, since only the stub uses the standard calling | |
8400 | // conventions. | |
8401 | value = mips_sym->template | |
8402 | get_mips16_fn_stub<big_endian>()->output_address(); | |
8403 | } | |
8404 | ||
8405 | return value; | |
8406 | } | |
8407 | ||
8408 | // Get the dynamic reloc section, creating it if necessary. It's always | |
8409 | // .rel.dyn, even for MIPS64. | |
8410 | ||
8411 | template<int size, bool big_endian> | |
8412 | typename Target_mips<size, big_endian>::Reloc_section* | |
8413 | Target_mips<size, big_endian>::rel_dyn_section(Layout* layout) | |
8414 | { | |
8415 | if (this->rel_dyn_ == NULL) | |
8416 | { | |
8417 | gold_assert(layout != NULL); | |
8418 | this->rel_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
8419 | layout->add_output_section_data(".rel.dyn", elfcpp::SHT_REL, | |
8420 | elfcpp::SHF_ALLOC, this->rel_dyn_, | |
8421 | ORDER_DYNAMIC_RELOCS, false); | |
8422 | ||
8423 | // First entry in .rel.dyn has to be null. | |
8424 | // This is hack - we define dummy output data and set its address to 0, | |
8425 | // and define absolute R_MIPS_NONE relocation with offset 0 against it. | |
8426 | // This ensures that the entry is null. | |
8427 | Output_data* od = new Output_data_zero_fill(0, 0); | |
8428 | od->set_address(0); | |
8429 | this->rel_dyn_->add_absolute(elfcpp::R_MIPS_NONE, od, 0); | |
8430 | } | |
8431 | return this->rel_dyn_; | |
8432 | } | |
8433 | ||
8434 | // Get the GOT section, creating it if necessary. | |
8435 | ||
8436 | template<int size, bool big_endian> | |
8437 | Mips_output_data_got<size, big_endian>* | |
8438 | Target_mips<size, big_endian>::got_section(Symbol_table* symtab, | |
8439 | Layout* layout) | |
8440 | { | |
8441 | if (this->got_ == NULL) | |
8442 | { | |
8443 | gold_assert(symtab != NULL && layout != NULL); | |
8444 | ||
8445 | this->got_ = new Mips_output_data_got<size, big_endian>(this, symtab, | |
8446 | layout); | |
8447 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, | |
8448 | (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE | | |
8449 | elfcpp::SHF_MIPS_GPREL), | |
8450 | this->got_, ORDER_DATA, false); | |
8451 | ||
8452 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. | |
8453 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, | |
8454 | Symbol_table::PREDEFINED, | |
8455 | this->got_, | |
8456 | 0, 0, elfcpp::STT_OBJECT, | |
8457 | elfcpp::STB_GLOBAL, | |
453018bf | 8458 | elfcpp::STV_HIDDEN, 0, |
9810d34d SS |
8459 | false, false); |
8460 | } | |
8461 | ||
8462 | return this->got_; | |
8463 | } | |
8464 | ||
8465 | // Calculate value of _gp symbol. | |
8466 | ||
8467 | template<int size, bool big_endian> | |
8468 | void | |
8469 | Target_mips<size, big_endian>::set_gp(Layout* layout, Symbol_table* symtab) | |
8470 | { | |
453018bf | 8471 | gold_assert(this->gp_ == NULL); |
9810d34d SS |
8472 | |
8473 | Sized_symbol<size>* gp = | |
8474 | static_cast<Sized_symbol<size>*>(symtab->lookup("_gp")); | |
453018bf VR |
8475 | |
8476 | // Set _gp symbol if the linker script hasn't created it. | |
8477 | if (gp == NULL || gp->source() != Symbol::IS_CONSTANT) | |
9810d34d | 8478 | { |
453018bf VR |
8479 | // If there is no .got section, gp should be based on .sdata. |
8480 | Output_data* gp_section = (this->got_ != NULL | |
8481 | ? this->got_->output_section() | |
8482 | : layout->find_output_section(".sdata")); | |
8483 | ||
8484 | if (gp_section != NULL) | |
8485 | gp = static_cast<Sized_symbol<size>*>(symtab->define_in_output_data( | |
8486 | "_gp", NULL, Symbol_table::PREDEFINED, | |
8487 | gp_section, MIPS_GP_OFFSET, 0, | |
8488 | elfcpp::STT_NOTYPE, | |
8489 | elfcpp::STB_LOCAL, | |
8490 | elfcpp::STV_DEFAULT, | |
8491 | 0, false, false)); | |
9810d34d | 8492 | } |
453018bf VR |
8493 | |
8494 | this->gp_ = gp; | |
9810d34d SS |
8495 | } |
8496 | ||
8497 | // Set the dynamic symbol indexes. INDEX is the index of the first | |
8498 | // global dynamic symbol. Pointers to the symbols are stored into the | |
8499 | // vector SYMS. The names are added to DYNPOOL. This returns an | |
8500 | // updated dynamic symbol index. | |
8501 | ||
8502 | template<int size, bool big_endian> | |
8503 | unsigned int | |
8504 | Target_mips<size, big_endian>::do_set_dynsym_indexes( | |
8505 | std::vector<Symbol*>* dyn_symbols, unsigned int index, | |
8506 | std::vector<Symbol*>* syms, Stringpool* dynpool, | |
8507 | Versions* versions, Symbol_table* symtab) const | |
8508 | { | |
8509 | std::vector<Symbol*> non_got_symbols; | |
8510 | std::vector<Symbol*> got_symbols; | |
8511 | ||
8512 | reorder_dyn_symbols<size, big_endian>(dyn_symbols, &non_got_symbols, | |
8513 | &got_symbols); | |
8514 | ||
8515 | for (std::vector<Symbol*>::iterator p = non_got_symbols.begin(); | |
8516 | p != non_got_symbols.end(); | |
8517 | ++p) | |
8518 | { | |
8519 | Symbol* sym = *p; | |
8520 | ||
8521 | // Note that SYM may already have a dynamic symbol index, since | |
8522 | // some symbols appear more than once in the symbol table, with | |
8523 | // and without a version. | |
8524 | ||
8525 | if (!sym->has_dynsym_index()) | |
8526 | { | |
8527 | sym->set_dynsym_index(index); | |
8528 | ++index; | |
8529 | syms->push_back(sym); | |
8530 | dynpool->add(sym->name(), false, NULL); | |
8531 | ||
8532 | // Record any version information. | |
8533 | if (sym->version() != NULL) | |
8534 | versions->record_version(symtab, dynpool, sym); | |
8535 | ||
8536 | // If the symbol is defined in a dynamic object and is | |
8537 | // referenced in a regular object, then mark the dynamic | |
8538 | // object as needed. This is used to implement --as-needed. | |
8539 | if (sym->is_from_dynobj() && sym->in_reg()) | |
8540 | sym->object()->set_is_needed(); | |
8541 | } | |
8542 | } | |
8543 | ||
8544 | for (std::vector<Symbol*>::iterator p = got_symbols.begin(); | |
8545 | p != got_symbols.end(); | |
8546 | ++p) | |
8547 | { | |
8548 | Symbol* sym = *p; | |
8549 | if (!sym->has_dynsym_index()) | |
8550 | { | |
8551 | // Record any version information. | |
8552 | if (sym->version() != NULL) | |
8553 | versions->record_version(symtab, dynpool, sym); | |
8554 | } | |
8555 | } | |
8556 | ||
8557 | index = versions->finalize(symtab, index, syms); | |
8558 | ||
8559 | int got_sym_count = 0; | |
8560 | for (std::vector<Symbol*>::iterator p = got_symbols.begin(); | |
8561 | p != got_symbols.end(); | |
8562 | ++p) | |
8563 | { | |
8564 | Symbol* sym = *p; | |
8565 | ||
8566 | if (!sym->has_dynsym_index()) | |
8567 | { | |
8568 | ++got_sym_count; | |
8569 | sym->set_dynsym_index(index); | |
8570 | ++index; | |
8571 | syms->push_back(sym); | |
8572 | dynpool->add(sym->name(), false, NULL); | |
8573 | ||
8574 | // If the symbol is defined in a dynamic object and is | |
8575 | // referenced in a regular object, then mark the dynamic | |
8576 | // object as needed. This is used to implement --as-needed. | |
8577 | if (sym->is_from_dynobj() && sym->in_reg()) | |
8578 | sym->object()->set_is_needed(); | |
8579 | } | |
8580 | } | |
8581 | ||
8582 | // Set index of the first symbol that has .got entry. | |
8583 | this->got_->set_first_global_got_dynsym_index( | |
8584 | got_sym_count > 0 ? index - got_sym_count : -1U); | |
8585 | ||
8586 | if (this->mips_stubs_ != NULL) | |
8587 | this->mips_stubs_->set_dynsym_count(index); | |
8588 | ||
8589 | return index; | |
8590 | } | |
8591 | ||
8592 | // Create a PLT entry for a global symbol referenced by r_type relocation. | |
8593 | ||
8594 | template<int size, bool big_endian> | |
8595 | void | |
8596 | Target_mips<size, big_endian>::make_plt_entry(Symbol_table* symtab, | |
8597 | Layout* layout, | |
8598 | Mips_symbol<size>* gsym, | |
8599 | unsigned int r_type) | |
8600 | { | |
8601 | if (gsym->has_lazy_stub() || gsym->has_plt_offset()) | |
8602 | return; | |
8603 | ||
8604 | if (this->plt_ == NULL) | |
8605 | { | |
8606 | // Create the GOT section first. | |
8607 | this->got_section(symtab, layout); | |
8608 | ||
8609 | this->got_plt_ = new Output_data_space(4, "** GOT PLT"); | |
8610 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
8611 | (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), | |
8612 | this->got_plt_, ORDER_DATA, false); | |
8613 | ||
8614 | // The first two entries are reserved. | |
8615 | this->got_plt_->set_current_data_size(2 * size/8); | |
8616 | ||
8617 | this->plt_ = new Mips_output_data_plt<size, big_endian>(layout, | |
8618 | this->got_plt_, | |
8619 | this); | |
8620 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
8621 | (elfcpp::SHF_ALLOC | |
8622 | | elfcpp::SHF_EXECINSTR), | |
8623 | this->plt_, ORDER_PLT, false); | |
04bc2a28 VR |
8624 | |
8625 | // Make the sh_info field of .rel.plt point to .plt. | |
8626 | Output_section* rel_plt_os = this->plt_->rel_plt()->output_section(); | |
8627 | rel_plt_os->set_info_section(this->plt_->output_section()); | |
9810d34d SS |
8628 | } |
8629 | ||
8630 | this->plt_->add_entry(gsym, r_type); | |
8631 | } | |
8632 | ||
8633 | ||
8634 | // Get the .MIPS.stubs section, creating it if necessary. | |
8635 | ||
8636 | template<int size, bool big_endian> | |
8637 | Mips_output_data_mips_stubs<size, big_endian>* | |
8638 | Target_mips<size, big_endian>::mips_stubs_section(Layout* layout) | |
8639 | { | |
8640 | if (this->mips_stubs_ == NULL) | |
8641 | { | |
8642 | this->mips_stubs_ = | |
8643 | new Mips_output_data_mips_stubs<size, big_endian>(this); | |
8644 | layout->add_output_section_data(".MIPS.stubs", elfcpp::SHT_PROGBITS, | |
8645 | (elfcpp::SHF_ALLOC | |
8646 | | elfcpp::SHF_EXECINSTR), | |
8647 | this->mips_stubs_, ORDER_PLT, false); | |
8648 | } | |
8649 | return this->mips_stubs_; | |
8650 | } | |
8651 | ||
8652 | // Get the LA25 stub section, creating it if necessary. | |
8653 | ||
8654 | template<int size, bool big_endian> | |
8655 | Mips_output_data_la25_stub<size, big_endian>* | |
8656 | Target_mips<size, big_endian>::la25_stub_section(Layout* layout) | |
8657 | { | |
8658 | if (this->la25_stub_ == NULL) | |
8659 | { | |
8660 | this->la25_stub_ = new Mips_output_data_la25_stub<size, big_endian>(); | |
8661 | layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS, | |
8662 | (elfcpp::SHF_ALLOC | |
8663 | | elfcpp::SHF_EXECINSTR), | |
8664 | this->la25_stub_, ORDER_TEXT, false); | |
8665 | } | |
8666 | return this->la25_stub_; | |
8667 | } | |
8668 | ||
8669 | // Process the relocations to determine unreferenced sections for | |
8670 | // garbage collection. | |
8671 | ||
8672 | template<int size, bool big_endian> | |
8673 | void | |
8674 | Target_mips<size, big_endian>::gc_process_relocs( | |
8675 | Symbol_table* symtab, | |
8676 | Layout* layout, | |
8677 | Sized_relobj_file<size, big_endian>* object, | |
8678 | unsigned int data_shndx, | |
47a9f4fc | 8679 | unsigned int sh_type, |
9810d34d SS |
8680 | const unsigned char* prelocs, |
8681 | size_t reloc_count, | |
8682 | Output_section* output_section, | |
8683 | bool needs_special_offset_handling, | |
8684 | size_t local_symbol_count, | |
8685 | const unsigned char* plocal_symbols) | |
8686 | { | |
8687 | typedef Target_mips<size, big_endian> Mips; | |
9810d34d | 8688 | |
47a9f4fc VR |
8689 | if (sh_type == elfcpp::SHT_REL) |
8690 | { | |
8691 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
8692 | Classify_reloc; | |
8693 | ||
8694 | gold::gc_process_relocs<size, big_endian, Mips, Scan, Classify_reloc>( | |
8695 | symtab, | |
8696 | layout, | |
8697 | this, | |
8698 | object, | |
8699 | data_shndx, | |
8700 | prelocs, | |
8701 | reloc_count, | |
8702 | output_section, | |
8703 | needs_special_offset_handling, | |
8704 | local_symbol_count, | |
8705 | plocal_symbols); | |
8706 | } | |
8707 | else if (sh_type == elfcpp::SHT_RELA) | |
8708 | { | |
8709 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
8710 | Classify_reloc; | |
8711 | ||
8712 | gold::gc_process_relocs<size, big_endian, Mips, Scan, Classify_reloc>( | |
8713 | symtab, | |
8714 | layout, | |
8715 | this, | |
8716 | object, | |
8717 | data_shndx, | |
8718 | prelocs, | |
8719 | reloc_count, | |
8720 | output_section, | |
8721 | needs_special_offset_handling, | |
8722 | local_symbol_count, | |
8723 | plocal_symbols); | |
8724 | } | |
8725 | else | |
8726 | gold_unreachable(); | |
9810d34d SS |
8727 | } |
8728 | ||
8729 | // Scan relocations for a section. | |
8730 | ||
8731 | template<int size, bool big_endian> | |
8732 | void | |
8733 | Target_mips<size, big_endian>::scan_relocs( | |
8734 | Symbol_table* symtab, | |
8735 | Layout* layout, | |
8736 | Sized_relobj_file<size, big_endian>* object, | |
8737 | unsigned int data_shndx, | |
8738 | unsigned int sh_type, | |
8739 | const unsigned char* prelocs, | |
8740 | size_t reloc_count, | |
8741 | Output_section* output_section, | |
8742 | bool needs_special_offset_handling, | |
8743 | size_t local_symbol_count, | |
8744 | const unsigned char* plocal_symbols) | |
8745 | { | |
8746 | typedef Target_mips<size, big_endian> Mips; | |
9810d34d SS |
8747 | |
8748 | if (sh_type == elfcpp::SHT_REL) | |
4d625b70 CC |
8749 | { |
8750 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
8751 | Classify_reloc; | |
8752 | ||
8753 | gold::scan_relocs<size, big_endian, Mips, Scan, Classify_reloc>( | |
8754 | symtab, | |
8755 | layout, | |
8756 | this, | |
8757 | object, | |
8758 | data_shndx, | |
8759 | prelocs, | |
8760 | reloc_count, | |
8761 | output_section, | |
8762 | needs_special_offset_handling, | |
8763 | local_symbol_count, | |
8764 | plocal_symbols); | |
8765 | } | |
9810d34d | 8766 | else if (sh_type == elfcpp::SHT_RELA) |
4d625b70 CC |
8767 | { |
8768 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
8769 | Classify_reloc; | |
8770 | ||
8771 | gold::scan_relocs<size, big_endian, Mips, Scan, Classify_reloc>( | |
8772 | symtab, | |
8773 | layout, | |
8774 | this, | |
8775 | object, | |
8776 | data_shndx, | |
8777 | prelocs, | |
8778 | reloc_count, | |
8779 | output_section, | |
8780 | needs_special_offset_handling, | |
8781 | local_symbol_count, | |
8782 | plocal_symbols); | |
8783 | } | |
9810d34d SS |
8784 | } |
8785 | ||
8786 | template<int size, bool big_endian> | |
8787 | bool | |
8788 | Target_mips<size, big_endian>::mips_32bit_flags(elfcpp::Elf_Word flags) | |
8789 | { | |
8790 | return ((flags & elfcpp::EF_MIPS_32BITMODE) != 0 | |
8791 | || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_O32 | |
8792 | || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_EABI32 | |
8793 | || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_1 | |
8794 | || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_2 | |
8795 | || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32 | |
f5b11759 VR |
8796 | || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32R2 |
8797 | || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32R6); | |
9810d34d SS |
8798 | } |
8799 | ||
8800 | // Return the MACH for a MIPS e_flags value. | |
8801 | template<int size, bool big_endian> | |
8802 | unsigned int | |
8803 | Target_mips<size, big_endian>::elf_mips_mach(elfcpp::Elf_Word flags) | |
8804 | { | |
8805 | switch (flags & elfcpp::EF_MIPS_MACH) | |
8806 | { | |
8807 | case elfcpp::E_MIPS_MACH_3900: | |
8808 | return mach_mips3900; | |
8809 | ||
8810 | case elfcpp::E_MIPS_MACH_4010: | |
8811 | return mach_mips4010; | |
8812 | ||
8813 | case elfcpp::E_MIPS_MACH_4100: | |
8814 | return mach_mips4100; | |
8815 | ||
8816 | case elfcpp::E_MIPS_MACH_4111: | |
8817 | return mach_mips4111; | |
8818 | ||
8819 | case elfcpp::E_MIPS_MACH_4120: | |
8820 | return mach_mips4120; | |
8821 | ||
8822 | case elfcpp::E_MIPS_MACH_4650: | |
8823 | return mach_mips4650; | |
8824 | ||
8825 | case elfcpp::E_MIPS_MACH_5400: | |
8826 | return mach_mips5400; | |
8827 | ||
8828 | case elfcpp::E_MIPS_MACH_5500: | |
8829 | return mach_mips5500; | |
8830 | ||
b52717c0 VR |
8831 | case elfcpp::E_MIPS_MACH_5900: |
8832 | return mach_mips5900; | |
8833 | ||
9810d34d SS |
8834 | case elfcpp::E_MIPS_MACH_9000: |
8835 | return mach_mips9000; | |
8836 | ||
8837 | case elfcpp::E_MIPS_MACH_SB1: | |
8838 | return mach_mips_sb1; | |
8839 | ||
8840 | case elfcpp::E_MIPS_MACH_LS2E: | |
8841 | return mach_mips_loongson_2e; | |
8842 | ||
8843 | case elfcpp::E_MIPS_MACH_LS2F: | |
8844 | return mach_mips_loongson_2f; | |
8845 | ||
8846 | case elfcpp::E_MIPS_MACH_LS3A: | |
8847 | return mach_mips_loongson_3a; | |
8848 | ||
b52717c0 VR |
8849 | case elfcpp::E_MIPS_MACH_OCTEON3: |
8850 | return mach_mips_octeon3; | |
8851 | ||
9810d34d SS |
8852 | case elfcpp::E_MIPS_MACH_OCTEON2: |
8853 | return mach_mips_octeon2; | |
8854 | ||
8855 | case elfcpp::E_MIPS_MACH_OCTEON: | |
8856 | return mach_mips_octeon; | |
8857 | ||
8858 | case elfcpp::E_MIPS_MACH_XLR: | |
8859 | return mach_mips_xlr; | |
8860 | ||
8861 | default: | |
8862 | switch (flags & elfcpp::EF_MIPS_ARCH) | |
8863 | { | |
8864 | default: | |
8865 | case elfcpp::E_MIPS_ARCH_1: | |
8866 | return mach_mips3000; | |
8867 | ||
8868 | case elfcpp::E_MIPS_ARCH_2: | |
8869 | return mach_mips6000; | |
8870 | ||
8871 | case elfcpp::E_MIPS_ARCH_3: | |
8872 | return mach_mips4000; | |
8873 | ||
8874 | case elfcpp::E_MIPS_ARCH_4: | |
8875 | return mach_mips8000; | |
8876 | ||
8877 | case elfcpp::E_MIPS_ARCH_5: | |
8878 | return mach_mips5; | |
8879 | ||
8880 | case elfcpp::E_MIPS_ARCH_32: | |
8881 | return mach_mipsisa32; | |
8882 | ||
8883 | case elfcpp::E_MIPS_ARCH_64: | |
8884 | return mach_mipsisa64; | |
8885 | ||
8886 | case elfcpp::E_MIPS_ARCH_32R2: | |
8887 | return mach_mipsisa32r2; | |
8888 | ||
f5b11759 VR |
8889 | case elfcpp::E_MIPS_ARCH_32R6: |
8890 | return mach_mipsisa32r6; | |
8891 | ||
9810d34d SS |
8892 | case elfcpp::E_MIPS_ARCH_64R2: |
8893 | return mach_mipsisa64r2; | |
f5b11759 VR |
8894 | |
8895 | case elfcpp::E_MIPS_ARCH_64R6: | |
8896 | return mach_mipsisa64r6; | |
9810d34d SS |
8897 | } |
8898 | } | |
8899 | ||
8900 | return 0; | |
8901 | } | |
8902 | ||
b52717c0 VR |
8903 | // Return the MACH for each .MIPS.abiflags ISA Extension. |
8904 | ||
8905 | template<int size, bool big_endian> | |
8906 | unsigned int | |
8907 | Target_mips<size, big_endian>::mips_isa_ext_mach(unsigned int isa_ext) | |
8908 | { | |
8909 | switch (isa_ext) | |
8910 | { | |
8911 | case elfcpp::AFL_EXT_3900: | |
8912 | return mach_mips3900; | |
8913 | ||
8914 | case elfcpp::AFL_EXT_4010: | |
8915 | return mach_mips4010; | |
8916 | ||
8917 | case elfcpp::AFL_EXT_4100: | |
8918 | return mach_mips4100; | |
8919 | ||
8920 | case elfcpp::AFL_EXT_4111: | |
8921 | return mach_mips4111; | |
8922 | ||
8923 | case elfcpp::AFL_EXT_4120: | |
8924 | return mach_mips4120; | |
8925 | ||
8926 | case elfcpp::AFL_EXT_4650: | |
8927 | return mach_mips4650; | |
8928 | ||
8929 | case elfcpp::AFL_EXT_5400: | |
8930 | return mach_mips5400; | |
8931 | ||
8932 | case elfcpp::AFL_EXT_5500: | |
8933 | return mach_mips5500; | |
8934 | ||
8935 | case elfcpp::AFL_EXT_5900: | |
8936 | return mach_mips5900; | |
8937 | ||
8938 | case elfcpp::AFL_EXT_10000: | |
8939 | return mach_mips10000; | |
8940 | ||
8941 | case elfcpp::AFL_EXT_LOONGSON_2E: | |
8942 | return mach_mips_loongson_2e; | |
8943 | ||
8944 | case elfcpp::AFL_EXT_LOONGSON_2F: | |
8945 | return mach_mips_loongson_2f; | |
8946 | ||
8947 | case elfcpp::AFL_EXT_LOONGSON_3A: | |
8948 | return mach_mips_loongson_3a; | |
8949 | ||
8950 | case elfcpp::AFL_EXT_SB1: | |
8951 | return mach_mips_sb1; | |
8952 | ||
8953 | case elfcpp::AFL_EXT_OCTEON: | |
8954 | return mach_mips_octeon; | |
8955 | ||
8956 | case elfcpp::AFL_EXT_OCTEONP: | |
8957 | return mach_mips_octeonp; | |
8958 | ||
8959 | case elfcpp::AFL_EXT_OCTEON2: | |
8960 | return mach_mips_octeon2; | |
8961 | ||
8962 | case elfcpp::AFL_EXT_XLR: | |
8963 | return mach_mips_xlr; | |
8964 | ||
8965 | default: | |
8966 | return mach_mips3000; | |
8967 | } | |
8968 | } | |
8969 | ||
8970 | // Return the .MIPS.abiflags value representing each ISA Extension. | |
8971 | ||
8972 | template<int size, bool big_endian> | |
8973 | unsigned int | |
8974 | Target_mips<size, big_endian>::mips_isa_ext(unsigned int mips_mach) | |
8975 | { | |
8976 | switch (mips_mach) | |
8977 | { | |
8978 | case mach_mips3900: | |
8979 | return elfcpp::AFL_EXT_3900; | |
8980 | ||
8981 | case mach_mips4010: | |
8982 | return elfcpp::AFL_EXT_4010; | |
8983 | ||
8984 | case mach_mips4100: | |
8985 | return elfcpp::AFL_EXT_4100; | |
8986 | ||
8987 | case mach_mips4111: | |
8988 | return elfcpp::AFL_EXT_4111; | |
8989 | ||
8990 | case mach_mips4120: | |
8991 | return elfcpp::AFL_EXT_4120; | |
8992 | ||
8993 | case mach_mips4650: | |
8994 | return elfcpp::AFL_EXT_4650; | |
8995 | ||
8996 | case mach_mips5400: | |
8997 | return elfcpp::AFL_EXT_5400; | |
8998 | ||
8999 | case mach_mips5500: | |
9000 | return elfcpp::AFL_EXT_5500; | |
9001 | ||
9002 | case mach_mips5900: | |
9003 | return elfcpp::AFL_EXT_5900; | |
9004 | ||
9005 | case mach_mips10000: | |
9006 | return elfcpp::AFL_EXT_10000; | |
9007 | ||
9008 | case mach_mips_loongson_2e: | |
9009 | return elfcpp::AFL_EXT_LOONGSON_2E; | |
9010 | ||
9011 | case mach_mips_loongson_2f: | |
9012 | return elfcpp::AFL_EXT_LOONGSON_2F; | |
9013 | ||
9014 | case mach_mips_loongson_3a: | |
9015 | return elfcpp::AFL_EXT_LOONGSON_3A; | |
9016 | ||
9017 | case mach_mips_sb1: | |
9018 | return elfcpp::AFL_EXT_SB1; | |
9019 | ||
9020 | case mach_mips_octeon: | |
9021 | return elfcpp::AFL_EXT_OCTEON; | |
9022 | ||
9023 | case mach_mips_octeonp: | |
9024 | return elfcpp::AFL_EXT_OCTEONP; | |
9025 | ||
9026 | case mach_mips_octeon3: | |
9027 | return elfcpp::AFL_EXT_OCTEON3; | |
9028 | ||
9029 | case mach_mips_octeon2: | |
9030 | return elfcpp::AFL_EXT_OCTEON2; | |
9031 | ||
9032 | case mach_mips_xlr: | |
9033 | return elfcpp::AFL_EXT_XLR; | |
9034 | ||
9035 | default: | |
9036 | return 0; | |
9037 | } | |
9038 | } | |
9039 | ||
9040 | // Update the isa_level, isa_rev, isa_ext fields of abiflags. | |
9041 | ||
9042 | template<int size, bool big_endian> | |
9043 | void | |
9044 | Target_mips<size, big_endian>::update_abiflags_isa(const std::string& name, | |
9045 | elfcpp::Elf_Word e_flags, Mips_abiflags<big_endian>* abiflags) | |
9046 | { | |
9047 | int new_isa = 0; | |
9048 | switch (e_flags & elfcpp::EF_MIPS_ARCH) | |
9049 | { | |
9050 | case elfcpp::E_MIPS_ARCH_1: | |
9051 | new_isa = this->level_rev(1, 0); | |
9052 | break; | |
9053 | case elfcpp::E_MIPS_ARCH_2: | |
9054 | new_isa = this->level_rev(2, 0); | |
9055 | break; | |
9056 | case elfcpp::E_MIPS_ARCH_3: | |
9057 | new_isa = this->level_rev(3, 0); | |
9058 | break; | |
9059 | case elfcpp::E_MIPS_ARCH_4: | |
9060 | new_isa = this->level_rev(4, 0); | |
9061 | break; | |
9062 | case elfcpp::E_MIPS_ARCH_5: | |
9063 | new_isa = this->level_rev(5, 0); | |
9064 | break; | |
9065 | case elfcpp::E_MIPS_ARCH_32: | |
9066 | new_isa = this->level_rev(32, 1); | |
9067 | break; | |
9068 | case elfcpp::E_MIPS_ARCH_32R2: | |
9069 | new_isa = this->level_rev(32, 2); | |
9070 | break; | |
f5b11759 VR |
9071 | case elfcpp::E_MIPS_ARCH_32R6: |
9072 | new_isa = this->level_rev(32, 6); | |
9073 | break; | |
b52717c0 VR |
9074 | case elfcpp::E_MIPS_ARCH_64: |
9075 | new_isa = this->level_rev(64, 1); | |
9076 | break; | |
9077 | case elfcpp::E_MIPS_ARCH_64R2: | |
9078 | new_isa = this->level_rev(64, 2); | |
9079 | break; | |
f5b11759 VR |
9080 | case elfcpp::E_MIPS_ARCH_64R6: |
9081 | new_isa = this->level_rev(64, 6); | |
9082 | break; | |
b52717c0 VR |
9083 | default: |
9084 | gold_error(_("%s: Unknown architecture %s"), name.c_str(), | |
9085 | this->elf_mips_mach_name(e_flags)); | |
9086 | } | |
9087 | ||
9088 | if (new_isa > this->level_rev(abiflags->isa_level, abiflags->isa_rev)) | |
9089 | { | |
9090 | // Decode a single value into level and revision. | |
9091 | abiflags->isa_level = new_isa >> 3; | |
9092 | abiflags->isa_rev = new_isa & 0x7; | |
9093 | } | |
9094 | ||
9095 | // Update the isa_ext if needed. | |
9096 | if (this->mips_mach_extends(this->mips_isa_ext_mach(abiflags->isa_ext), | |
9097 | this->elf_mips_mach(e_flags))) | |
9098 | abiflags->isa_ext = this->mips_isa_ext(this->elf_mips_mach(e_flags)); | |
9099 | } | |
9100 | ||
9101 | // Infer the content of the ABI flags based on the elf header. | |
9102 | ||
9103 | template<int size, bool big_endian> | |
9104 | void | |
9105 | Target_mips<size, big_endian>::infer_abiflags( | |
9106 | Mips_relobj<size, big_endian>* relobj, Mips_abiflags<big_endian>* abiflags) | |
9107 | { | |
9108 | const Attributes_section_data* pasd = relobj->attributes_section_data(); | |
9109 | int attr_fp_abi = elfcpp::Val_GNU_MIPS_ABI_FP_ANY; | |
9110 | elfcpp::Elf_Word e_flags = relobj->processor_specific_flags(); | |
9111 | ||
9112 | this->update_abiflags_isa(relobj->name(), e_flags, abiflags); | |
9113 | if (pasd != NULL) | |
9114 | { | |
9115 | // Read fp_abi from the .gnu.attribute section. | |
9116 | const Object_attribute* attr = | |
9117 | pasd->known_attributes(Object_attribute::OBJ_ATTR_GNU); | |
9118 | attr_fp_abi = attr[elfcpp::Tag_GNU_MIPS_ABI_FP].int_value(); | |
9119 | } | |
9120 | ||
9121 | abiflags->fp_abi = attr_fp_abi; | |
9122 | abiflags->cpr1_size = elfcpp::AFL_REG_NONE; | |
9123 | abiflags->cpr2_size = elfcpp::AFL_REG_NONE; | |
9124 | abiflags->gpr_size = this->mips_32bit_flags(e_flags) ? elfcpp::AFL_REG_32 | |
9125 | : elfcpp::AFL_REG_64; | |
9126 | ||
9127 | if (abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_SINGLE | |
9128 | || abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_XX | |
9129 | || (abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE | |
9130 | && abiflags->gpr_size == elfcpp::AFL_REG_32)) | |
9131 | abiflags->cpr1_size = elfcpp::AFL_REG_32; | |
9132 | else if (abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE | |
9133 | || abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_64 | |
9134 | || abiflags->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_64A) | |
9135 | abiflags->cpr1_size = elfcpp::AFL_REG_64; | |
9136 | ||
9137 | if (e_flags & elfcpp::EF_MIPS_ARCH_ASE_MDMX) | |
9138 | abiflags->ases |= elfcpp::AFL_ASE_MDMX; | |
9139 | if (e_flags & elfcpp::EF_MIPS_ARCH_ASE_M16) | |
9140 | abiflags->ases |= elfcpp::AFL_ASE_MIPS16; | |
9141 | if (e_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS) | |
9142 | abiflags->ases |= elfcpp::AFL_ASE_MICROMIPS; | |
9143 | ||
9144 | if (abiflags->fp_abi != elfcpp::Val_GNU_MIPS_ABI_FP_ANY | |
9145 | && abiflags->fp_abi != elfcpp::Val_GNU_MIPS_ABI_FP_SOFT | |
9146 | && abiflags->fp_abi != elfcpp::Val_GNU_MIPS_ABI_FP_64A | |
9147 | && abiflags->isa_level >= 32 | |
9148 | && abiflags->isa_ext != elfcpp::AFL_EXT_LOONGSON_3A) | |
9149 | abiflags->flags1 |= elfcpp::AFL_FLAGS1_ODDSPREG; | |
9150 | } | |
9151 | ||
9152 | // Create abiflags from elf header or from .MIPS.abiflags section. | |
9153 | ||
9154 | template<int size, bool big_endian> | |
9155 | void | |
9156 | Target_mips<size, big_endian>::create_abiflags( | |
9157 | Mips_relobj<size, big_endian>* relobj, | |
9158 | Mips_abiflags<big_endian>* abiflags) | |
9159 | { | |
9160 | Mips_abiflags<big_endian>* sec_abiflags = relobj->abiflags(); | |
9161 | Mips_abiflags<big_endian> header_abiflags; | |
9162 | ||
9163 | this->infer_abiflags(relobj, &header_abiflags); | |
9164 | ||
9165 | if (sec_abiflags == NULL) | |
9166 | { | |
9167 | // If there is no input .MIPS.abiflags section, use abiflags created | |
9168 | // from elf header. | |
9169 | *abiflags = header_abiflags; | |
9170 | return; | |
9171 | } | |
9172 | ||
9173 | this->has_abiflags_section_ = true; | |
9174 | ||
9175 | // It is not possible to infer the correct ISA revision for R3 or R5 | |
9176 | // so drop down to R2 for the checks. | |
9177 | unsigned char isa_rev = sec_abiflags->isa_rev; | |
9178 | if (isa_rev == 3 || isa_rev == 5) | |
9179 | isa_rev = 2; | |
9180 | ||
9181 | // Check compatibility between abiflags created from elf header | |
9182 | // and abiflags from .MIPS.abiflags section in this object file. | |
9183 | if (this->level_rev(sec_abiflags->isa_level, isa_rev) | |
9184 | < this->level_rev(header_abiflags.isa_level, header_abiflags.isa_rev)) | |
9185 | gold_warning(_("%s: Inconsistent ISA between e_flags and .MIPS.abiflags"), | |
9186 | relobj->name().c_str()); | |
9187 | if (header_abiflags.fp_abi != elfcpp::Val_GNU_MIPS_ABI_FP_ANY | |
9188 | && sec_abiflags->fp_abi != header_abiflags.fp_abi) | |
9189 | gold_warning(_("%s: Inconsistent FP ABI between .gnu.attributes and " | |
9190 | ".MIPS.abiflags"), relobj->name().c_str()); | |
9191 | if ((sec_abiflags->ases & header_abiflags.ases) != header_abiflags.ases) | |
9192 | gold_warning(_("%s: Inconsistent ASEs between e_flags and .MIPS.abiflags"), | |
9193 | relobj->name().c_str()); | |
9194 | // The isa_ext is allowed to be an extension of what can be inferred | |
9195 | // from e_flags. | |
9196 | if (!this->mips_mach_extends(this->mips_isa_ext_mach(header_abiflags.isa_ext), | |
9197 | this->mips_isa_ext_mach(sec_abiflags->isa_ext))) | |
9198 | gold_warning(_("%s: Inconsistent ISA extensions between e_flags and " | |
9199 | ".MIPS.abiflags"), relobj->name().c_str()); | |
9200 | if (sec_abiflags->flags2 != 0) | |
9201 | gold_warning(_("%s: Unexpected flag in the flags2 field of " | |
9202 | ".MIPS.abiflags (0x%x)"), relobj->name().c_str(), | |
9203 | sec_abiflags->flags2); | |
9204 | // Use abiflags from .MIPS.abiflags section. | |
9205 | *abiflags = *sec_abiflags; | |
9206 | } | |
9207 | ||
9208 | // Return the meaning of fp_abi, or "unknown" if not known. | |
9209 | ||
9210 | template<int size, bool big_endian> | |
9211 | const char* | |
9212 | Target_mips<size, big_endian>::fp_abi_string(int fp) | |
9213 | { | |
9214 | switch (fp) | |
9215 | { | |
9216 | case elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE: | |
9217 | return "-mdouble-float"; | |
9218 | case elfcpp::Val_GNU_MIPS_ABI_FP_SINGLE: | |
9219 | return "-msingle-float"; | |
9220 | case elfcpp::Val_GNU_MIPS_ABI_FP_SOFT: | |
9221 | return "-msoft-float"; | |
9222 | case elfcpp::Val_GNU_MIPS_ABI_FP_OLD_64: | |
9223 | return _("-mips32r2 -mfp64 (12 callee-saved)"); | |
9224 | case elfcpp::Val_GNU_MIPS_ABI_FP_XX: | |
9225 | return "-mfpxx"; | |
9226 | case elfcpp::Val_GNU_MIPS_ABI_FP_64: | |
9227 | return "-mgp32 -mfp64"; | |
9228 | case elfcpp::Val_GNU_MIPS_ABI_FP_64A: | |
9229 | return "-mgp32 -mfp64 -mno-odd-spreg"; | |
9230 | default: | |
9231 | return "unknown"; | |
9232 | } | |
9233 | } | |
9234 | ||
9235 | // Select fp_abi. | |
9236 | ||
9237 | template<int size, bool big_endian> | |
9238 | int | |
9239 | Target_mips<size, big_endian>::select_fp_abi(const std::string& name, int in_fp, | |
9240 | int out_fp) | |
9241 | { | |
9242 | if (in_fp == out_fp) | |
9243 | return out_fp; | |
9244 | ||
9245 | if (out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_ANY) | |
9246 | return in_fp; | |
9247 | else if (out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_XX | |
9248 | && (in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE | |
9249 | || in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64 | |
9250 | || in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64A)) | |
9251 | return in_fp; | |
9252 | else if (in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_XX | |
9253 | && (out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_DOUBLE | |
9254 | || out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64 | |
9255 | || out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64A)) | |
9256 | return out_fp; // Keep the current setting. | |
9257 | else if (out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64A | |
9258 | && in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64) | |
9259 | return in_fp; | |
9260 | else if (in_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64A | |
9261 | && out_fp == elfcpp::Val_GNU_MIPS_ABI_FP_64) | |
9262 | return out_fp; // Keep the current setting. | |
9263 | else if (in_fp != elfcpp::Val_GNU_MIPS_ABI_FP_ANY) | |
9264 | gold_warning(_("%s: FP ABI %s is incompatible with %s"), name.c_str(), | |
9265 | fp_abi_string(in_fp), fp_abi_string(out_fp)); | |
9266 | return out_fp; | |
9267 | } | |
9268 | ||
9269 | // Merge attributes from input object. | |
9270 | ||
9271 | template<int size, bool big_endian> | |
9272 | void | |
9273 | Target_mips<size, big_endian>::merge_obj_attributes(const std::string& name, | |
9274 | const Attributes_section_data* pasd) | |
9275 | { | |
9276 | // Return if there is no attributes section data. | |
9277 | if (pasd == NULL) | |
9278 | return; | |
9279 | ||
9280 | // If output has no object attributes, just copy. | |
9281 | if (this->attributes_section_data_ == NULL) | |
9282 | { | |
9283 | this->attributes_section_data_ = new Attributes_section_data(*pasd); | |
9284 | return; | |
9285 | } | |
9286 | ||
9287 | Object_attribute* out_attr = this->attributes_section_data_->known_attributes( | |
9288 | Object_attribute::OBJ_ATTR_GNU); | |
9289 | ||
9290 | out_attr[elfcpp::Tag_GNU_MIPS_ABI_FP].set_type(1); | |
9291 | out_attr[elfcpp::Tag_GNU_MIPS_ABI_FP].set_int_value(this->abiflags_->fp_abi); | |
9292 | ||
9293 | // Merge Tag_compatibility attributes and any common GNU ones. | |
9294 | this->attributes_section_data_->merge(name.c_str(), pasd); | |
9295 | } | |
9296 | ||
9297 | // Merge abiflags from input object. | |
9298 | ||
9299 | template<int size, bool big_endian> | |
9300 | void | |
9301 | Target_mips<size, big_endian>::merge_obj_abiflags(const std::string& name, | |
9302 | Mips_abiflags<big_endian>* in_abiflags) | |
9303 | { | |
9304 | // If output has no abiflags, just copy. | |
9305 | if (this->abiflags_ == NULL) | |
9306 | { | |
9307 | this->abiflags_ = new Mips_abiflags<big_endian>(*in_abiflags); | |
9308 | return; | |
9309 | } | |
9310 | ||
9311 | this->abiflags_->fp_abi = this->select_fp_abi(name, in_abiflags->fp_abi, | |
9312 | this->abiflags_->fp_abi); | |
9313 | ||
9314 | // Merge abiflags. | |
9315 | this->abiflags_->isa_level = std::max(this->abiflags_->isa_level, | |
9316 | in_abiflags->isa_level); | |
9317 | this->abiflags_->isa_rev = std::max(this->abiflags_->isa_rev, | |
9318 | in_abiflags->isa_rev); | |
9319 | this->abiflags_->gpr_size = std::max(this->abiflags_->gpr_size, | |
9320 | in_abiflags->gpr_size); | |
9321 | this->abiflags_->cpr1_size = std::max(this->abiflags_->cpr1_size, | |
9322 | in_abiflags->cpr1_size); | |
9323 | this->abiflags_->cpr2_size = std::max(this->abiflags_->cpr2_size, | |
9324 | in_abiflags->cpr2_size); | |
9325 | this->abiflags_->ases |= in_abiflags->ases; | |
9326 | this->abiflags_->flags1 |= in_abiflags->flags1; | |
9327 | } | |
9328 | ||
9810d34d SS |
9329 | // Check whether machine EXTENSION is an extension of machine BASE. |
9330 | template<int size, bool big_endian> | |
9331 | bool | |
9332 | Target_mips<size, big_endian>::mips_mach_extends(unsigned int base, | |
9333 | unsigned int extension) | |
9334 | { | |
9335 | if (extension == base) | |
9336 | return true; | |
9337 | ||
9338 | if ((base == mach_mipsisa32) | |
9339 | && this->mips_mach_extends(mach_mipsisa64, extension)) | |
9340 | return true; | |
9341 | ||
9342 | if ((base == mach_mipsisa32r2) | |
9343 | && this->mips_mach_extends(mach_mipsisa64r2, extension)) | |
9344 | return true; | |
9345 | ||
9346 | for (unsigned int i = 0; i < this->mips_mach_extensions_.size(); ++i) | |
9347 | if (extension == this->mips_mach_extensions_[i].first) | |
9348 | { | |
9349 | extension = this->mips_mach_extensions_[i].second; | |
9350 | if (extension == base) | |
9351 | return true; | |
9352 | } | |
9353 | ||
9354 | return false; | |
9355 | } | |
9356 | ||
b52717c0 VR |
9357 | // Merge file header flags from input object. |
9358 | ||
9810d34d SS |
9359 | template<int size, bool big_endian> |
9360 | void | |
b52717c0 VR |
9361 | Target_mips<size, big_endian>::merge_obj_e_flags(const std::string& name, |
9362 | elfcpp::Elf_Word in_flags) | |
9810d34d SS |
9363 | { |
9364 | // If flags are not set yet, just copy them. | |
9365 | if (!this->are_processor_specific_flags_set()) | |
9366 | { | |
9367 | this->set_processor_specific_flags(in_flags); | |
9810d34d SS |
9368 | this->mach_ = this->elf_mips_mach(in_flags); |
9369 | return; | |
9370 | } | |
9371 | ||
9372 | elfcpp::Elf_Word new_flags = in_flags; | |
9373 | elfcpp::Elf_Word old_flags = this->processor_specific_flags(); | |
9374 | elfcpp::Elf_Word merged_flags = this->processor_specific_flags(); | |
9375 | merged_flags |= new_flags & elfcpp::EF_MIPS_NOREORDER; | |
9376 | ||
9377 | // Check flag compatibility. | |
9378 | new_flags &= ~elfcpp::EF_MIPS_NOREORDER; | |
9379 | old_flags &= ~elfcpp::EF_MIPS_NOREORDER; | |
9380 | ||
9381 | // Some IRIX 6 BSD-compatibility objects have this bit set. It | |
9382 | // doesn't seem to matter. | |
9383 | new_flags &= ~elfcpp::EF_MIPS_XGOT; | |
9384 | old_flags &= ~elfcpp::EF_MIPS_XGOT; | |
9385 | ||
9386 | // MIPSpro generates ucode info in n64 objects. Again, we should | |
9387 | // just be able to ignore this. | |
9388 | new_flags &= ~elfcpp::EF_MIPS_UCODE; | |
9389 | old_flags &= ~elfcpp::EF_MIPS_UCODE; | |
9390 | ||
9810d34d SS |
9391 | if (new_flags == old_flags) |
9392 | { | |
9393 | this->set_processor_specific_flags(merged_flags); | |
9394 | return; | |
9395 | } | |
9396 | ||
9397 | if (((new_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0) | |
9398 | != ((old_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0)) | |
9399 | gold_warning(_("%s: linking abicalls files with non-abicalls files"), | |
9400 | name.c_str()); | |
9401 | ||
9402 | if (new_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) | |
9403 | merged_flags |= elfcpp::EF_MIPS_CPIC; | |
9404 | if (!(new_flags & elfcpp::EF_MIPS_PIC)) | |
9405 | merged_flags &= ~elfcpp::EF_MIPS_PIC; | |
9406 | ||
9407 | new_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC); | |
9408 | old_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC); | |
9409 | ||
9410 | // Compare the ISAs. | |
9411 | if (mips_32bit_flags(old_flags) != mips_32bit_flags(new_flags)) | |
9412 | gold_error(_("%s: linking 32-bit code with 64-bit code"), name.c_str()); | |
9413 | else if (!this->mips_mach_extends(this->elf_mips_mach(in_flags), this->mach_)) | |
9414 | { | |
9415 | // Output ISA isn't the same as, or an extension of, input ISA. | |
9416 | if (this->mips_mach_extends(this->mach_, this->elf_mips_mach(in_flags))) | |
9417 | { | |
9418 | // Copy the architecture info from input object to output. Also copy | |
9419 | // the 32-bit flag (if set) so that we continue to recognise | |
9420 | // output as a 32-bit binary. | |
9421 | this->mach_ = this->elf_mips_mach(in_flags); | |
9422 | merged_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH); | |
9423 | merged_flags |= (new_flags & (elfcpp::EF_MIPS_ARCH | |
9424 | | elfcpp::EF_MIPS_MACH | elfcpp::EF_MIPS_32BITMODE)); | |
9425 | ||
b52717c0 VR |
9426 | // Update the ABI flags isa_level, isa_rev, isa_ext fields. |
9427 | this->update_abiflags_isa(name, merged_flags, this->abiflags_); | |
9428 | ||
9810d34d SS |
9429 | // Copy across the ABI flags if output doesn't use them |
9430 | // and if that was what caused us to treat input object as 32-bit. | |
9431 | if ((old_flags & elfcpp::EF_MIPS_ABI) == 0 | |
9432 | && this->mips_32bit_flags(new_flags) | |
9433 | && !this->mips_32bit_flags(new_flags & ~elfcpp::EF_MIPS_ABI)) | |
9434 | merged_flags |= new_flags & elfcpp::EF_MIPS_ABI; | |
9435 | } | |
9436 | else | |
9437 | // The ISAs aren't compatible. | |
9438 | gold_error(_("%s: linking %s module with previous %s modules"), | |
9439 | name.c_str(), this->elf_mips_mach_name(in_flags), | |
9440 | this->elf_mips_mach_name(merged_flags)); | |
9441 | } | |
9442 | ||
9443 | new_flags &= (~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | |
9444 | | elfcpp::EF_MIPS_32BITMODE)); | |
9445 | old_flags &= (~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH | |
9446 | | elfcpp::EF_MIPS_32BITMODE)); | |
9447 | ||
01b84e25 VR |
9448 | // Compare ABIs. |
9449 | if ((new_flags & elfcpp::EF_MIPS_ABI) != (old_flags & elfcpp::EF_MIPS_ABI)) | |
9810d34d SS |
9450 | { |
9451 | // Only error if both are set (to different values). | |
01b84e25 | 9452 | if ((new_flags & elfcpp::EF_MIPS_ABI) |
9810d34d | 9453 | && (old_flags & elfcpp::EF_MIPS_ABI)) |
9810d34d SS |
9454 | gold_error(_("%s: ABI mismatch: linking %s module with " |
9455 | "previous %s modules"), name.c_str(), | |
01b84e25 VR |
9456 | this->elf_mips_abi_name(in_flags), |
9457 | this->elf_mips_abi_name(merged_flags)); | |
9810d34d SS |
9458 | |
9459 | new_flags &= ~elfcpp::EF_MIPS_ABI; | |
9460 | old_flags &= ~elfcpp::EF_MIPS_ABI; | |
9461 | } | |
9462 | ||
9463 | // Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together | |
9464 | // and allow arbitrary mixing of the remaining ASEs (retain the union). | |
9465 | if ((new_flags & elfcpp::EF_MIPS_ARCH_ASE) | |
9466 | != (old_flags & elfcpp::EF_MIPS_ARCH_ASE)) | |
9467 | { | |
9468 | int old_micro = old_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS; | |
9469 | int new_micro = new_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS; | |
9470 | int old_m16 = old_flags & elfcpp::EF_MIPS_ARCH_ASE_M16; | |
9471 | int new_m16 = new_flags & elfcpp::EF_MIPS_ARCH_ASE_M16; | |
9472 | int micro_mis = old_m16 && new_micro; | |
9473 | int m16_mis = old_micro && new_m16; | |
9474 | ||
9475 | if (m16_mis || micro_mis) | |
9476 | gold_error(_("%s: ASE mismatch: linking %s module with " | |
9477 | "previous %s modules"), name.c_str(), | |
9478 | m16_mis ? "MIPS16" : "microMIPS", | |
9479 | m16_mis ? "microMIPS" : "MIPS16"); | |
9480 | ||
9481 | merged_flags |= new_flags & elfcpp::EF_MIPS_ARCH_ASE; | |
9482 | ||
9483 | new_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE; | |
9484 | old_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE; | |
9485 | } | |
9486 | ||
b52717c0 VR |
9487 | // Compare NaN encodings. |
9488 | if ((new_flags & elfcpp::EF_MIPS_NAN2008) != (old_flags & elfcpp::EF_MIPS_NAN2008)) | |
9489 | { | |
9490 | gold_error(_("%s: linking %s module with previous %s modules"), | |
9491 | name.c_str(), | |
9492 | (new_flags & elfcpp::EF_MIPS_NAN2008 | |
9493 | ? "-mnan=2008" : "-mnan=legacy"), | |
9494 | (old_flags & elfcpp::EF_MIPS_NAN2008 | |
9495 | ? "-mnan=2008" : "-mnan=legacy")); | |
9496 | ||
9497 | new_flags &= ~elfcpp::EF_MIPS_NAN2008; | |
9498 | old_flags &= ~elfcpp::EF_MIPS_NAN2008; | |
9499 | } | |
9500 | ||
9501 | // Compare FP64 state. | |
9502 | if ((new_flags & elfcpp::EF_MIPS_FP64) != (old_flags & elfcpp::EF_MIPS_FP64)) | |
9503 | { | |
9504 | gold_error(_("%s: linking %s module with previous %s modules"), | |
9505 | name.c_str(), | |
9506 | (new_flags & elfcpp::EF_MIPS_FP64 | |
9507 | ? "-mfp64" : "-mfp32"), | |
9508 | (old_flags & elfcpp::EF_MIPS_FP64 | |
9509 | ? "-mfp64" : "-mfp32")); | |
9510 | ||
9511 | new_flags &= ~elfcpp::EF_MIPS_FP64; | |
9512 | old_flags &= ~elfcpp::EF_MIPS_FP64; | |
9513 | } | |
9514 | ||
9810d34d SS |
9515 | // Warn about any other mismatches. |
9516 | if (new_flags != old_flags) | |
9517 | gold_error(_("%s: uses different e_flags (0x%x) fields than previous " | |
9518 | "modules (0x%x)"), name.c_str(), new_flags, old_flags); | |
9519 | ||
9520 | this->set_processor_specific_flags(merged_flags); | |
9521 | } | |
9522 | ||
9523 | // Adjust ELF file header. | |
9524 | ||
9525 | template<int size, bool big_endian> | |
9526 | void | |
9527 | Target_mips<size, big_endian>::do_adjust_elf_header( | |
9528 | unsigned char* view, | |
9529 | int len) | |
9530 | { | |
9531 | gold_assert(len == elfcpp::Elf_sizes<size>::ehdr_size); | |
9532 | ||
01b84e25 | 9533 | elfcpp::Ehdr<size, big_endian> ehdr(view); |
b52717c0 VR |
9534 | unsigned char e_ident[elfcpp::EI_NIDENT]; |
9535 | elfcpp::Elf_Word flags = this->processor_specific_flags(); | |
9536 | memcpy(e_ident, ehdr.get_e_ident(), elfcpp::EI_NIDENT); | |
9537 | ||
9538 | unsigned char ei_abiversion = 0; | |
9539 | elfcpp::Elf_Half type = ehdr.get_e_type(); | |
9540 | if (type == elfcpp::ET_EXEC | |
9541 | && parameters->options().copyreloc() | |
9542 | && (flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) | |
9543 | == elfcpp::EF_MIPS_CPIC) | |
9544 | ei_abiversion = 1; | |
9545 | ||
9546 | if (this->abiflags_ != NULL | |
9547 | && (this->abiflags_->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_64 | |
9548 | || this->abiflags_->fp_abi == elfcpp::Val_GNU_MIPS_ABI_FP_64A)) | |
9549 | ei_abiversion = 3; | |
9550 | ||
9551 | e_ident[elfcpp::EI_ABIVERSION] = ei_abiversion; | |
9810d34d | 9552 | elfcpp::Ehdr_write<size, big_endian> oehdr(view); |
b52717c0 | 9553 | oehdr.put_e_ident(e_ident); |
01b84e25 | 9554 | |
b52717c0 VR |
9555 | if (this->entry_symbol_is_compressed_) |
9556 | oehdr.put_e_entry(ehdr.get_e_entry() + 1); | |
9810d34d SS |
9557 | } |
9558 | ||
9559 | // do_make_elf_object to override the same function in the base class. | |
9560 | // We need to use a target-specific sub-class of | |
9561 | // Sized_relobj_file<size, big_endian> to store Mips specific information. | |
9562 | // Hence we need to have our own ELF object creation. | |
9563 | ||
9564 | template<int size, bool big_endian> | |
9565 | Object* | |
9566 | Target_mips<size, big_endian>::do_make_elf_object( | |
9567 | const std::string& name, | |
9568 | Input_file* input_file, | |
9569 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
9570 | { | |
9571 | int et = ehdr.get_e_type(); | |
9572 | // ET_EXEC files are valid input for --just-symbols/-R, | |
9573 | // and we treat them as relocatable objects. | |
9574 | if (et == elfcpp::ET_REL | |
9575 | || (et == elfcpp::ET_EXEC && input_file->just_symbols())) | |
9576 | { | |
9577 | Mips_relobj<size, big_endian>* obj = | |
9578 | new Mips_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
9579 | obj->setup(); | |
9580 | return obj; | |
9581 | } | |
9582 | else if (et == elfcpp::ET_DYN) | |
9583 | { | |
9584 | // TODO(sasa): Should we create Mips_dynobj? | |
9585 | return Target::do_make_elf_object(name, input_file, offset, ehdr); | |
9586 | } | |
9587 | else | |
9588 | { | |
9589 | gold_error(_("%s: unsupported ELF file type %d"), | |
9590 | name.c_str(), et); | |
9591 | return NULL; | |
9592 | } | |
9593 | } | |
9594 | ||
9595 | // Finalize the sections. | |
9596 | ||
9597 | template <int size, bool big_endian> | |
9598 | void | |
9599 | Target_mips<size, big_endian>::do_finalize_sections(Layout* layout, | |
9600 | const Input_objects* input_objects, | |
9601 | Symbol_table* symtab) | |
9602 | { | |
9603 | // Add +1 to MIPS16 and microMIPS init_ and _fini symbols so that DT_INIT and | |
9604 | // DT_FINI have correct values. | |
9605 | Mips_symbol<size>* init = static_cast<Mips_symbol<size>*>( | |
9606 | symtab->lookup(parameters->options().init())); | |
9607 | if (init != NULL && (init->is_mips16() || init->is_micromips())) | |
9608 | init->set_value(init->value() | 1); | |
9609 | Mips_symbol<size>* fini = static_cast<Mips_symbol<size>*>( | |
9610 | symtab->lookup(parameters->options().fini())); | |
9611 | if (fini != NULL && (fini->is_mips16() || fini->is_micromips())) | |
9612 | fini->set_value(fini->value() | 1); | |
9613 | ||
9614 | // Check whether the entry symbol is mips16 or micromips. This is needed to | |
9615 | // adjust entry address in ELF header. | |
9616 | Mips_symbol<size>* entry = | |
9617 | static_cast<Mips_symbol<size>*>(symtab->lookup(this->entry_symbol_name())); | |
9618 | this->entry_symbol_is_compressed_ = (entry != NULL && (entry->is_mips16() | |
9619 | || entry->is_micromips())); | |
9620 | ||
9621 | if (!parameters->doing_static_link() | |
9622 | && (strcmp(parameters->options().hash_style(), "gnu") == 0 | |
9623 | || strcmp(parameters->options().hash_style(), "both") == 0)) | |
9624 | { | |
9625 | // .gnu.hash and the MIPS ABI require .dynsym to be sorted in different | |
9626 | // ways. .gnu.hash needs symbols to be grouped by hash code whereas the | |
9627 | // MIPS ABI requires a mapping between the GOT and the symbol table. | |
9628 | gold_error(".gnu.hash is incompatible with the MIPS ABI"); | |
9629 | } | |
9630 | ||
9631 | // Check whether the final section that was scanned has HI16 or GOT16 | |
9632 | // relocations without the corresponding LO16 part. | |
9633 | if (this->got16_addends_.size() > 0) | |
9634 | gold_error("Can't find matching LO16 reloc"); | |
9635 | ||
9810d34d SS |
9636 | // Check for any mips16 stub sections that we can discard. |
9637 | if (!parameters->options().relocatable()) | |
9638 | { | |
9639 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); | |
9640 | p != input_objects->relobj_end(); | |
9641 | ++p) | |
9642 | { | |
9643 | Mips_relobj<size, big_endian>* object = | |
9644 | Mips_relobj<size, big_endian>::as_mips_relobj(*p); | |
9645 | object->discard_mips16_stub_sections(symtab); | |
9646 | } | |
9647 | } | |
9648 | ||
82e49872 VR |
9649 | Valtype gprmask = 0; |
9650 | Valtype cprmask1 = 0; | |
9651 | Valtype cprmask2 = 0; | |
9652 | Valtype cprmask3 = 0; | |
9653 | Valtype cprmask4 = 0; | |
9654 | bool has_reginfo_section = false; | |
9655 | ||
9810d34d SS |
9656 | for (Input_objects::Relobj_iterator p = input_objects->relobj_begin(); |
9657 | p != input_objects->relobj_end(); | |
9658 | ++p) | |
9659 | { | |
9660 | Mips_relobj<size, big_endian>* relobj = | |
9661 | Mips_relobj<size, big_endian>::as_mips_relobj(*p); | |
9662 | ||
82e49872 VR |
9663 | // Merge .reginfo contents of input objects. |
9664 | if (relobj->has_reginfo_section()) | |
9665 | { | |
9666 | has_reginfo_section = true; | |
9667 | gprmask |= relobj->gprmask(); | |
9668 | cprmask1 |= relobj->cprmask1(); | |
9669 | cprmask2 |= relobj->cprmask2(); | |
9670 | cprmask3 |= relobj->cprmask3(); | |
9671 | cprmask4 |= relobj->cprmask4(); | |
9672 | } | |
9673 | ||
9810d34d | 9674 | Input_file::Format format = relobj->input_file()->format(); |
b52717c0 VR |
9675 | if (format != Input_file::FORMAT_ELF) |
9676 | continue; | |
9810d34d | 9677 | |
b52717c0 VR |
9678 | // If all input sections will be discarded, don't use this object |
9679 | // file for merging processor specific flags. | |
9680 | bool should_merge_processor_specific_flags = false; | |
47a9f4fc | 9681 | |
b52717c0 VR |
9682 | for (unsigned int i = 1; i < relobj->shnum(); ++i) |
9683 | if (relobj->output_section(i) != NULL) | |
9684 | { | |
9685 | should_merge_processor_specific_flags = true; | |
9686 | break; | |
9687 | } | |
9810d34d | 9688 | |
b52717c0 VR |
9689 | if (!should_merge_processor_specific_flags) |
9690 | continue; | |
9691 | ||
9692 | // Merge processor specific flags. | |
9693 | Mips_abiflags<big_endian> in_abiflags; | |
9694 | ||
9695 | this->create_abiflags(relobj, &in_abiflags); | |
9696 | this->merge_obj_e_flags(relobj->name(), | |
9697 | relobj->processor_specific_flags()); | |
9698 | this->merge_obj_abiflags(relobj->name(), &in_abiflags); | |
9699 | this->merge_obj_attributes(relobj->name(), | |
9700 | relobj->attributes_section_data()); | |
9810d34d SS |
9701 | } |
9702 | ||
b52717c0 VR |
9703 | // Create a .gnu.attributes section if we have merged any attributes |
9704 | // from inputs. | |
9705 | if (this->attributes_section_data_ != NULL) | |
9810d34d | 9706 | { |
b52717c0 VR |
9707 | Output_attributes_section_data* attributes_section = |
9708 | new Output_attributes_section_data(*this->attributes_section_data_); | |
9709 | layout->add_output_section_data(".gnu.attributes", | |
9710 | elfcpp::SHT_GNU_ATTRIBUTES, 0, | |
9711 | attributes_section, ORDER_INVALID, false); | |
9712 | } | |
9810d34d | 9713 | |
b52717c0 VR |
9714 | // Create .MIPS.abiflags output section if there is an input section. |
9715 | if (this->has_abiflags_section_) | |
9716 | { | |
9717 | Mips_output_section_abiflags<size, big_endian>* abiflags_section = | |
9718 | new Mips_output_section_abiflags<size, big_endian>(*this->abiflags_); | |
9810d34d | 9719 | |
b52717c0 VR |
9720 | Output_section* os = |
9721 | layout->add_output_section_data(".MIPS.abiflags", | |
9722 | elfcpp::SHT_MIPS_ABIFLAGS, | |
9723 | elfcpp::SHF_ALLOC, | |
9724 | abiflags_section, ORDER_INVALID, false); | |
9810d34d | 9725 | |
b52717c0 VR |
9726 | if (!parameters->options().relocatable() && os != NULL) |
9727 | { | |
9728 | Output_segment* abiflags_segment = | |
9729 | layout->make_output_segment(elfcpp::PT_MIPS_ABIFLAGS, elfcpp::PF_R); | |
9730 | abiflags_segment->add_output_section_to_nonload(os, elfcpp::PF_R); | |
9731 | } | |
9810d34d SS |
9732 | } |
9733 | ||
82e49872 | 9734 | if (has_reginfo_section && !parameters->options().gc_sections()) |
9810d34d | 9735 | { |
82e49872 VR |
9736 | // Create .reginfo output section. |
9737 | Mips_output_section_reginfo<size, big_endian>* reginfo_section = | |
9738 | new Mips_output_section_reginfo<size, big_endian>(this, gprmask, | |
9739 | cprmask1, cprmask2, | |
9740 | cprmask3, cprmask4); | |
9741 | ||
9742 | Output_section* os = | |
9743 | layout->add_output_section_data(".reginfo", elfcpp::SHT_MIPS_REGINFO, | |
9744 | elfcpp::SHF_ALLOC, reginfo_section, | |
9745 | ORDER_INVALID, false); | |
9746 | ||
9747 | if (!parameters->options().relocatable() && os != NULL) | |
9748 | { | |
9749 | Output_segment* reginfo_segment = | |
9750 | layout->make_output_segment(elfcpp::PT_MIPS_REGINFO, | |
9751 | elfcpp::PF_R); | |
9752 | reginfo_segment->add_output_section_to_nonload(os, elfcpp::PF_R); | |
9753 | } | |
9810d34d SS |
9754 | } |
9755 | ||
9756 | if (this->plt_ != NULL) | |
9757 | { | |
9758 | // Set final PLT offsets for symbols. | |
9759 | this->plt_section()->set_plt_offsets(); | |
9760 | ||
9761 | // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. | |
9762 | // Set STO_MICROMIPS flag if the output has microMIPS code, but only if | |
9763 | // there are no standard PLT entries present. | |
9764 | unsigned char nonvis = 0; | |
9765 | if (this->is_output_micromips() | |
9766 | && !this->plt_section()->has_standard_entries()) | |
9767 | nonvis = elfcpp::STO_MICROMIPS >> 2; | |
9768 | symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, | |
9769 | Symbol_table::PREDEFINED, | |
9770 | this->plt_, | |
9771 | 0, 0, elfcpp::STT_FUNC, | |
9772 | elfcpp::STB_LOCAL, | |
9773 | elfcpp::STV_DEFAULT, nonvis, | |
9774 | false, false); | |
9775 | } | |
9776 | ||
9777 | if (this->mips_stubs_ != NULL) | |
9778 | { | |
9779 | // Define _MIPS_STUBS_ at the start of the .MIPS.stubs section. | |
9780 | unsigned char nonvis = 0; | |
9781 | if (this->is_output_micromips()) | |
9782 | nonvis = elfcpp::STO_MICROMIPS >> 2; | |
9783 | symtab->define_in_output_data("_MIPS_STUBS_", NULL, | |
9784 | Symbol_table::PREDEFINED, | |
9785 | this->mips_stubs_, | |
9786 | 0, 0, elfcpp::STT_FUNC, | |
9787 | elfcpp::STB_LOCAL, | |
9788 | elfcpp::STV_DEFAULT, nonvis, | |
9789 | false, false); | |
9790 | } | |
9791 | ||
9792 | if (!parameters->options().relocatable() && !parameters->doing_static_link()) | |
9793 | // In case there is no .got section, create one. | |
9794 | this->got_section(symtab, layout); | |
9795 | ||
9796 | // Emit any relocs we saved in an attempt to avoid generating COPY | |
9797 | // relocs. | |
9798 | if (this->copy_relocs_.any_saved_relocs()) | |
9799 | this->copy_relocs_.emit_mips(this->rel_dyn_section(layout), symtab, layout, | |
9800 | this); | |
9801 | ||
453018bf VR |
9802 | // Set _gp value. |
9803 | this->set_gp(layout, symtab); | |
9804 | ||
9810d34d SS |
9805 | // Emit dynamic relocs. |
9806 | for (typename std::vector<Dyn_reloc>::iterator p = this->dyn_relocs_.begin(); | |
9807 | p != this->dyn_relocs_.end(); | |
9808 | ++p) | |
9809 | p->emit(this->rel_dyn_section(layout), this->got_section(), symtab); | |
9810 | ||
9811 | if (this->has_got_section()) | |
9812 | this->got_section()->lay_out_got(layout, symtab, input_objects); | |
9813 | ||
9814 | if (this->mips_stubs_ != NULL) | |
9815 | this->mips_stubs_->set_needs_dynsym_value(); | |
9816 | ||
9817 | // Check for functions that might need $25 to be valid on entry. | |
9818 | // TODO(sasa): Can we do this without iterating over all symbols? | |
9819 | typedef Symbol_visitor_check_symbols<size, big_endian> Symbol_visitor; | |
9820 | symtab->for_all_symbols<size, Symbol_visitor>(Symbol_visitor(this, layout, | |
9821 | symtab)); | |
9822 | ||
9823 | // Add NULL segment. | |
9824 | if (!parameters->options().relocatable()) | |
9825 | layout->make_output_segment(elfcpp::PT_NULL, 0); | |
9826 | ||
9810d34d SS |
9827 | // Fill in some more dynamic tags. |
9828 | // TODO(sasa): Add more dynamic tags. | |
9829 | const Reloc_section* rel_plt = (this->plt_ == NULL | |
9830 | ? NULL : this->plt_->rel_plt()); | |
9831 | layout->add_target_dynamic_tags(true, this->got_, rel_plt, | |
9832 | this->rel_dyn_, true, false); | |
9833 | ||
9834 | Output_data_dynamic* const odyn = layout->dynamic_data(); | |
9835 | if (odyn != NULL | |
9836 | && !parameters->options().relocatable() | |
9837 | && !parameters->doing_static_link()) | |
9838 | { | |
9839 | unsigned int d_val; | |
9840 | // This element holds a 32-bit version id for the Runtime | |
9841 | // Linker Interface. This will start at integer value 1. | |
9842 | d_val = 0x01; | |
9843 | odyn->add_constant(elfcpp::DT_MIPS_RLD_VERSION, d_val); | |
9844 | ||
9845 | // Dynamic flags | |
9846 | d_val = elfcpp::RHF_NOTPOT; | |
9847 | odyn->add_constant(elfcpp::DT_MIPS_FLAGS, d_val); | |
9848 | ||
5c3024d2 | 9849 | // Save layout for using when emitting custom dynamic tags. |
9810d34d SS |
9850 | this->layout_ = layout; |
9851 | ||
9852 | // This member holds the base address of the segment. | |
9853 | odyn->add_custom(elfcpp::DT_MIPS_BASE_ADDRESS); | |
9854 | ||
9855 | // This member holds the number of entries in the .dynsym section. | |
9856 | odyn->add_custom(elfcpp::DT_MIPS_SYMTABNO); | |
9857 | ||
9858 | // This member holds the index of the first dynamic symbol | |
9859 | // table entry that corresponds to an entry in the global offset table. | |
9860 | odyn->add_custom(elfcpp::DT_MIPS_GOTSYM); | |
9861 | ||
9862 | // This member holds the number of local GOT entries. | |
9863 | odyn->add_constant(elfcpp::DT_MIPS_LOCAL_GOTNO, | |
9864 | this->got_->get_local_gotno()); | |
9865 | ||
9866 | if (this->plt_ != NULL) | |
9867 | // DT_MIPS_PLTGOT dynamic tag | |
9868 | odyn->add_section_address(elfcpp::DT_MIPS_PLTGOT, this->got_plt_); | |
a8ecc9fe VR |
9869 | |
9870 | if (!parameters->options().shared()) | |
9871 | { | |
9872 | this->rld_map_ = new Output_data_zero_fill(size / 8, size / 8); | |
9873 | ||
9874 | layout->add_output_section_data(".rld_map", elfcpp::SHT_PROGBITS, | |
9875 | (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), | |
9876 | this->rld_map_, ORDER_INVALID, false); | |
9877 | ||
9878 | // __RLD_MAP will be filled in by the runtime loader to contain | |
9879 | // a pointer to the _r_debug structure. | |
9880 | Symbol* rld_map = symtab->define_in_output_data("__RLD_MAP", NULL, | |
9881 | Symbol_table::PREDEFINED, | |
9882 | this->rld_map_, | |
9883 | 0, 0, elfcpp::STT_OBJECT, | |
9884 | elfcpp::STB_GLOBAL, | |
9885 | elfcpp::STV_DEFAULT, 0, | |
9886 | false, false); | |
9887 | ||
c1f59f8f VR |
9888 | if (!rld_map->is_forced_local()) |
9889 | rld_map->set_needs_dynsym_entry(); | |
a8ecc9fe VR |
9890 | |
9891 | if (!parameters->options().pie()) | |
9892 | // This member holds the absolute address of the debug pointer. | |
9893 | odyn->add_section_address(elfcpp::DT_MIPS_RLD_MAP, this->rld_map_); | |
9894 | else | |
9895 | // This member holds the offset to the debug pointer, | |
9896 | // relative to the address of the tag. | |
9897 | odyn->add_custom(elfcpp::DT_MIPS_RLD_MAP_REL); | |
9898 | } | |
9810d34d | 9899 | } |
a8ecc9fe | 9900 | } |
9810d34d SS |
9901 | |
9902 | // Get the custom dynamic tag value. | |
9903 | template<int size, bool big_endian> | |
9904 | unsigned int | |
9905 | Target_mips<size, big_endian>::do_dynamic_tag_custom_value(elfcpp::DT tag) const | |
9906 | { | |
9907 | switch (tag) | |
9908 | { | |
9909 | case elfcpp::DT_MIPS_BASE_ADDRESS: | |
9910 | { | |
9911 | // The base address of the segment. | |
9912 | // At this point, the segment list has been sorted into final order, | |
9913 | // so just return vaddr of the first readable PT_LOAD segment. | |
9914 | Output_segment* seg = | |
9915 | this->layout_->find_output_segment(elfcpp::PT_LOAD, elfcpp::PF_R, 0); | |
9916 | gold_assert(seg != NULL); | |
9917 | return seg->vaddr(); | |
9918 | } | |
9919 | ||
9920 | case elfcpp::DT_MIPS_SYMTABNO: | |
9921 | // The number of entries in the .dynsym section. | |
9922 | return this->get_dt_mips_symtabno(); | |
9923 | ||
9924 | case elfcpp::DT_MIPS_GOTSYM: | |
9925 | { | |
9926 | // The index of the first dynamic symbol table entry that corresponds | |
9927 | // to an entry in the GOT. | |
9928 | if (this->got_->first_global_got_dynsym_index() != -1U) | |
9929 | return this->got_->first_global_got_dynsym_index(); | |
9930 | else | |
9931 | // In case if we don't have global GOT symbols we default to setting | |
9932 | // DT_MIPS_GOTSYM to the same value as DT_MIPS_SYMTABNO. | |
9933 | return this->get_dt_mips_symtabno(); | |
9934 | } | |
9935 | ||
a8ecc9fe VR |
9936 | case elfcpp::DT_MIPS_RLD_MAP_REL: |
9937 | { | |
9938 | // The MIPS_RLD_MAP_REL tag stores the offset to the debug pointer, | |
9939 | // relative to the address of the tag. | |
9940 | Output_data_dynamic* const odyn = this->layout_->dynamic_data(); | |
9941 | unsigned int entry_offset = | |
9942 | odyn->get_entry_offset(elfcpp::DT_MIPS_RLD_MAP_REL); | |
9943 | gold_assert(entry_offset != -1U); | |
9944 | return this->rld_map_->address() - (odyn->address() + entry_offset); | |
9945 | } | |
9810d34d SS |
9946 | default: |
9947 | gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag); | |
9948 | } | |
9949 | ||
9950 | return (unsigned int)-1; | |
9951 | } | |
9952 | ||
9953 | // Relocate section data. | |
9954 | ||
9955 | template<int size, bool big_endian> | |
9956 | void | |
9957 | Target_mips<size, big_endian>::relocate_section( | |
9958 | const Relocate_info<size, big_endian>* relinfo, | |
9959 | unsigned int sh_type, | |
9960 | const unsigned char* prelocs, | |
9961 | size_t reloc_count, | |
9962 | Output_section* output_section, | |
9963 | bool needs_special_offset_handling, | |
9964 | unsigned char* view, | |
9965 | Mips_address address, | |
9966 | section_size_type view_size, | |
9967 | const Reloc_symbol_changes* reloc_symbol_changes) | |
9968 | { | |
9969 | typedef Target_mips<size, big_endian> Mips; | |
9970 | typedef typename Target_mips<size, big_endian>::Relocate Mips_relocate; | |
9971 | ||
9972 | if (sh_type == elfcpp::SHT_REL) | |
4d625b70 CC |
9973 | { |
9974 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
9975 | Classify_reloc; | |
9976 | ||
9977 | gold::relocate_section<size, big_endian, Mips, Mips_relocate, | |
9978 | gold::Default_comdat_behavior, Classify_reloc>( | |
9979 | relinfo, | |
9980 | this, | |
9981 | prelocs, | |
9982 | reloc_count, | |
9983 | output_section, | |
9984 | needs_special_offset_handling, | |
9985 | view, | |
9986 | address, | |
9987 | view_size, | |
9988 | reloc_symbol_changes); | |
9989 | } | |
9810d34d | 9990 | else if (sh_type == elfcpp::SHT_RELA) |
4d625b70 CC |
9991 | { |
9992 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
9993 | Classify_reloc; | |
9994 | ||
9995 | gold::relocate_section<size, big_endian, Mips, Mips_relocate, | |
9996 | gold::Default_comdat_behavior, Classify_reloc>( | |
9997 | relinfo, | |
9998 | this, | |
9999 | prelocs, | |
10000 | reloc_count, | |
10001 | output_section, | |
10002 | needs_special_offset_handling, | |
10003 | view, | |
10004 | address, | |
10005 | view_size, | |
10006 | reloc_symbol_changes); | |
10007 | } | |
9810d34d SS |
10008 | } |
10009 | ||
10010 | // Return the size of a relocation while scanning during a relocatable | |
10011 | // link. | |
10012 | ||
9810d34d | 10013 | unsigned int |
4d625b70 | 10014 | mips_get_size_for_reloc(unsigned int r_type, Relobj* object) |
9810d34d SS |
10015 | { |
10016 | switch (r_type) | |
10017 | { | |
10018 | case elfcpp::R_MIPS_NONE: | |
10019 | case elfcpp::R_MIPS_TLS_DTPMOD64: | |
10020 | case elfcpp::R_MIPS_TLS_DTPREL64: | |
10021 | case elfcpp::R_MIPS_TLS_TPREL64: | |
10022 | return 0; | |
10023 | ||
10024 | case elfcpp::R_MIPS_32: | |
10025 | case elfcpp::R_MIPS_TLS_DTPMOD32: | |
10026 | case elfcpp::R_MIPS_TLS_DTPREL32: | |
10027 | case elfcpp::R_MIPS_TLS_TPREL32: | |
10028 | case elfcpp::R_MIPS_REL32: | |
10029 | case elfcpp::R_MIPS_PC32: | |
10030 | case elfcpp::R_MIPS_GPREL32: | |
10031 | case elfcpp::R_MIPS_JALR: | |
47a9f4fc | 10032 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
10033 | return 4; |
10034 | ||
10035 | case elfcpp::R_MIPS_16: | |
10036 | case elfcpp::R_MIPS_HI16: | |
10037 | case elfcpp::R_MIPS_LO16: | |
e242ece1 VR |
10038 | case elfcpp::R_MIPS_HIGHER: |
10039 | case elfcpp::R_MIPS_HIGHEST: | |
9810d34d SS |
10040 | case elfcpp::R_MIPS_GPREL16: |
10041 | case elfcpp::R_MIPS16_HI16: | |
10042 | case elfcpp::R_MIPS16_LO16: | |
10043 | case elfcpp::R_MIPS_PC16: | |
f5b11759 VR |
10044 | case elfcpp::R_MIPS_PCHI16: |
10045 | case elfcpp::R_MIPS_PCLO16: | |
9810d34d SS |
10046 | case elfcpp::R_MIPS_GOT16: |
10047 | case elfcpp::R_MIPS16_GOT16: | |
10048 | case elfcpp::R_MIPS_CALL16: | |
10049 | case elfcpp::R_MIPS16_CALL16: | |
10050 | case elfcpp::R_MIPS_GOT_HI16: | |
10051 | case elfcpp::R_MIPS_CALL_HI16: | |
10052 | case elfcpp::R_MIPS_GOT_LO16: | |
10053 | case elfcpp::R_MIPS_CALL_LO16: | |
10054 | case elfcpp::R_MIPS_TLS_DTPREL_HI16: | |
10055 | case elfcpp::R_MIPS_TLS_DTPREL_LO16: | |
10056 | case elfcpp::R_MIPS_TLS_TPREL_HI16: | |
10057 | case elfcpp::R_MIPS_TLS_TPREL_LO16: | |
10058 | case elfcpp::R_MIPS16_GPREL: | |
10059 | case elfcpp::R_MIPS_GOT_DISP: | |
10060 | case elfcpp::R_MIPS_LITERAL: | |
10061 | case elfcpp::R_MIPS_GOT_PAGE: | |
10062 | case elfcpp::R_MIPS_GOT_OFST: | |
10063 | case elfcpp::R_MIPS_TLS_GD: | |
10064 | case elfcpp::R_MIPS_TLS_LDM: | |
10065 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
10066 | return 2; | |
10067 | ||
10068 | // These relocations are not byte sized | |
10069 | case elfcpp::R_MIPS_26: | |
10070 | case elfcpp::R_MIPS16_26: | |
f5b11759 VR |
10071 | case elfcpp::R_MIPS_PC21_S2: |
10072 | case elfcpp::R_MIPS_PC26_S2: | |
10073 | case elfcpp::R_MIPS_PC18_S3: | |
10074 | case elfcpp::R_MIPS_PC19_S2: | |
9810d34d SS |
10075 | return 4; |
10076 | ||
10077 | case elfcpp::R_MIPS_COPY: | |
10078 | case elfcpp::R_MIPS_JUMP_SLOT: | |
10079 | object->error(_("unexpected reloc %u in object file"), r_type); | |
10080 | return 0; | |
10081 | ||
10082 | default: | |
10083 | object->error(_("unsupported reloc %u in object file"), r_type); | |
10084 | return 0; | |
10085 | } | |
10086 | } | |
10087 | ||
10088 | // Scan the relocs during a relocatable link. | |
10089 | ||
10090 | template<int size, bool big_endian> | |
10091 | void | |
10092 | Target_mips<size, big_endian>::scan_relocatable_relocs( | |
10093 | Symbol_table* symtab, | |
10094 | Layout* layout, | |
10095 | Sized_relobj_file<size, big_endian>* object, | |
10096 | unsigned int data_shndx, | |
10097 | unsigned int sh_type, | |
10098 | const unsigned char* prelocs, | |
10099 | size_t reloc_count, | |
10100 | Output_section* output_section, | |
10101 | bool needs_special_offset_handling, | |
10102 | size_t local_symbol_count, | |
10103 | const unsigned char* plocal_symbols, | |
10104 | Relocatable_relocs* rr) | |
10105 | { | |
47a9f4fc VR |
10106 | if (sh_type == elfcpp::SHT_REL) |
10107 | { | |
10108 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
10109 | Classify_reloc; | |
10110 | typedef Mips_scan_relocatable_relocs<big_endian, Classify_reloc> | |
10111 | Scan_relocatable_relocs; | |
10112 | ||
10113 | gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>( | |
10114 | symtab, | |
10115 | layout, | |
10116 | object, | |
10117 | data_shndx, | |
10118 | prelocs, | |
10119 | reloc_count, | |
10120 | output_section, | |
10121 | needs_special_offset_handling, | |
10122 | local_symbol_count, | |
10123 | plocal_symbols, | |
10124 | rr); | |
10125 | } | |
10126 | else if (sh_type == elfcpp::SHT_RELA) | |
10127 | { | |
10128 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
10129 | Classify_reloc; | |
10130 | typedef Mips_scan_relocatable_relocs<big_endian, Classify_reloc> | |
10131 | Scan_relocatable_relocs; | |
10132 | ||
10133 | gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>( | |
10134 | symtab, | |
10135 | layout, | |
10136 | object, | |
10137 | data_shndx, | |
10138 | prelocs, | |
10139 | reloc_count, | |
10140 | output_section, | |
10141 | needs_special_offset_handling, | |
10142 | local_symbol_count, | |
10143 | plocal_symbols, | |
10144 | rr); | |
10145 | } | |
10146 | else | |
10147 | gold_unreachable(); | |
9810d34d SS |
10148 | } |
10149 | ||
4d625b70 CC |
10150 | // Scan the relocs for --emit-relocs. |
10151 | ||
10152 | template<int size, bool big_endian> | |
10153 | void | |
10154 | Target_mips<size, big_endian>::emit_relocs_scan( | |
10155 | Symbol_table* symtab, | |
10156 | Layout* layout, | |
10157 | Sized_relobj_file<size, big_endian>* object, | |
10158 | unsigned int data_shndx, | |
10159 | unsigned int sh_type, | |
10160 | const unsigned char* prelocs, | |
10161 | size_t reloc_count, | |
10162 | Output_section* output_section, | |
10163 | bool needs_special_offset_handling, | |
10164 | size_t local_symbol_count, | |
10165 | const unsigned char* plocal_syms, | |
10166 | Relocatable_relocs* rr) | |
10167 | { | |
47a9f4fc VR |
10168 | if (sh_type == elfcpp::SHT_REL) |
10169 | { | |
10170 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
10171 | Classify_reloc; | |
10172 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
10173 | Emit_relocs_strategy; | |
10174 | ||
10175 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
10176 | symtab, | |
10177 | layout, | |
10178 | object, | |
10179 | data_shndx, | |
10180 | prelocs, | |
10181 | reloc_count, | |
10182 | output_section, | |
10183 | needs_special_offset_handling, | |
10184 | local_symbol_count, | |
10185 | plocal_syms, | |
10186 | rr); | |
10187 | } | |
10188 | else if (sh_type == elfcpp::SHT_RELA) | |
10189 | { | |
10190 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
10191 | Classify_reloc; | |
10192 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
10193 | Emit_relocs_strategy; | |
10194 | ||
10195 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( | |
10196 | symtab, | |
10197 | layout, | |
10198 | object, | |
10199 | data_shndx, | |
10200 | prelocs, | |
10201 | reloc_count, | |
10202 | output_section, | |
10203 | needs_special_offset_handling, | |
10204 | local_symbol_count, | |
10205 | plocal_syms, | |
10206 | rr); | |
10207 | } | |
10208 | else | |
10209 | gold_unreachable(); | |
4d625b70 CC |
10210 | } |
10211 | ||
9810d34d SS |
10212 | // Emit relocations for a section. |
10213 | ||
10214 | template<int size, bool big_endian> | |
10215 | void | |
10216 | Target_mips<size, big_endian>::relocate_relocs( | |
10217 | const Relocate_info<size, big_endian>* relinfo, | |
10218 | unsigned int sh_type, | |
10219 | const unsigned char* prelocs, | |
10220 | size_t reloc_count, | |
10221 | Output_section* output_section, | |
10222 | typename elfcpp::Elf_types<size>::Elf_Off | |
10223 | offset_in_output_section, | |
9810d34d SS |
10224 | unsigned char* view, |
10225 | Mips_address view_address, | |
10226 | section_size_type view_size, | |
10227 | unsigned char* reloc_view, | |
10228 | section_size_type reloc_view_size) | |
10229 | { | |
47a9f4fc VR |
10230 | if (sh_type == elfcpp::SHT_REL) |
10231 | { | |
10232 | typedef Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian> | |
10233 | Classify_reloc; | |
10234 | ||
10235 | gold::relocate_relocs<size, big_endian, Classify_reloc>( | |
10236 | relinfo, | |
10237 | prelocs, | |
10238 | reloc_count, | |
10239 | output_section, | |
10240 | offset_in_output_section, | |
10241 | view, | |
10242 | view_address, | |
10243 | view_size, | |
10244 | reloc_view, | |
10245 | reloc_view_size); | |
10246 | } | |
10247 | else if (sh_type == elfcpp::SHT_RELA) | |
10248 | { | |
10249 | typedef Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
10250 | Classify_reloc; | |
10251 | ||
10252 | gold::relocate_relocs<size, big_endian, Classify_reloc>( | |
10253 | relinfo, | |
10254 | prelocs, | |
10255 | reloc_count, | |
10256 | output_section, | |
10257 | offset_in_output_section, | |
10258 | view, | |
10259 | view_address, | |
10260 | view_size, | |
10261 | reloc_view, | |
10262 | reloc_view_size); | |
10263 | } | |
10264 | else | |
10265 | gold_unreachable(); | |
9810d34d SS |
10266 | } |
10267 | ||
10268 | // Perform target-specific processing in a relocatable link. This is | |
10269 | // only used if we use the relocation strategy RELOC_SPECIAL. | |
10270 | ||
10271 | template<int size, bool big_endian> | |
10272 | void | |
10273 | Target_mips<size, big_endian>::relocate_special_relocatable( | |
10274 | const Relocate_info<size, big_endian>* relinfo, | |
10275 | unsigned int sh_type, | |
10276 | const unsigned char* preloc_in, | |
10277 | size_t relnum, | |
10278 | Output_section* output_section, | |
10279 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, | |
10280 | unsigned char* view, | |
10281 | Mips_address view_address, | |
10282 | section_size_type, | |
10283 | unsigned char* preloc_out) | |
10284 | { | |
10285 | // We can only handle REL type relocation sections. | |
10286 | gold_assert(sh_type == elfcpp::SHT_REL); | |
10287 | ||
10288 | typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc | |
10289 | Reltype; | |
10290 | typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc_write | |
10291 | Reltype_write; | |
10292 | ||
10293 | typedef Mips_relocate_functions<size, big_endian> Reloc_funcs; | |
10294 | ||
10295 | const Mips_address invalid_address = static_cast<Mips_address>(0) - 1; | |
10296 | ||
10297 | Mips_relobj<size, big_endian>* object = | |
10298 | Mips_relobj<size, big_endian>::as_mips_relobj(relinfo->object); | |
10299 | const unsigned int local_count = object->local_symbol_count(); | |
10300 | ||
10301 | Reltype reloc(preloc_in); | |
10302 | Reltype_write reloc_write(preloc_out); | |
10303 | ||
10304 | elfcpp::Elf_types<32>::Elf_WXword r_info = reloc.get_r_info(); | |
10305 | const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
10306 | const unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
10307 | ||
10308 | // Get the new symbol index. | |
10309 | // We only use RELOC_SPECIAL strategy in local relocations. | |
10310 | gold_assert(r_sym < local_count); | |
10311 | ||
10312 | // We are adjusting a section symbol. We need to find | |
10313 | // the symbol table index of the section symbol for | |
10314 | // the output section corresponding to input section | |
10315 | // in which this symbol is defined. | |
10316 | bool is_ordinary; | |
10317 | unsigned int shndx = object->local_symbol_input_shndx(r_sym, &is_ordinary); | |
10318 | gold_assert(is_ordinary); | |
10319 | Output_section* os = object->output_section(shndx); | |
10320 | gold_assert(os != NULL); | |
10321 | gold_assert(os->needs_symtab_index()); | |
10322 | unsigned int new_symndx = os->symtab_index(); | |
10323 | ||
10324 | // Get the new offset--the location in the output section where | |
10325 | // this relocation should be applied. | |
10326 | ||
10327 | Mips_address offset = reloc.get_r_offset(); | |
10328 | Mips_address new_offset; | |
10329 | if (offset_in_output_section != invalid_address) | |
10330 | new_offset = offset + offset_in_output_section; | |
10331 | else | |
10332 | { | |
10333 | section_offset_type sot_offset = | |
10334 | convert_types<section_offset_type, Mips_address>(offset); | |
10335 | section_offset_type new_sot_offset = | |
10336 | output_section->output_offset(object, relinfo->data_shndx, | |
10337 | sot_offset); | |
10338 | gold_assert(new_sot_offset != -1); | |
10339 | new_offset = new_sot_offset; | |
10340 | } | |
10341 | ||
10342 | // In an object file, r_offset is an offset within the section. | |
10343 | // In an executable or dynamic object, generated by | |
10344 | // --emit-relocs, r_offset is an absolute address. | |
10345 | if (!parameters->options().relocatable()) | |
10346 | { | |
10347 | new_offset += view_address; | |
10348 | if (offset_in_output_section != invalid_address) | |
10349 | new_offset -= offset_in_output_section; | |
10350 | } | |
10351 | ||
10352 | reloc_write.put_r_offset(new_offset); | |
10353 | reloc_write.put_r_info(elfcpp::elf_r_info<32>(new_symndx, r_type)); | |
10354 | ||
10355 | // Handle the reloc addend. | |
10356 | // The relocation uses a section symbol in the input file. | |
10357 | // We are adjusting it to use a section symbol in the output | |
10358 | // file. The input section symbol refers to some address in | |
10359 | // the input section. We need the relocation in the output | |
10360 | // file to refer to that same address. This adjustment to | |
10361 | // the addend is the same calculation we use for a simple | |
10362 | // absolute relocation for the input section symbol. | |
47a9f4fc | 10363 | Valtype calculated_value = 0; |
9810d34d SS |
10364 | const Symbol_value<size>* psymval = object->local_symbol(r_sym); |
10365 | ||
10366 | unsigned char* paddend = view + offset; | |
10367 | typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY; | |
10368 | switch (r_type) | |
10369 | { | |
10370 | case elfcpp::R_MIPS_26: | |
10371 | reloc_status = Reloc_funcs::rel26(paddend, object, psymval, | |
10372 | offset_in_output_section, true, 0, sh_type == elfcpp::SHT_REL, NULL, | |
47a9f4fc VR |
10373 | false /*TODO(sasa): cross mode jump*/, r_type, this->jal_to_bal(), |
10374 | false, &calculated_value); | |
9810d34d SS |
10375 | break; |
10376 | ||
10377 | default: | |
10378 | gold_unreachable(); | |
10379 | } | |
10380 | ||
10381 | // Report any errors. | |
10382 | switch (reloc_status) | |
10383 | { | |
10384 | case Reloc_funcs::STATUS_OKAY: | |
10385 | break; | |
10386 | case Reloc_funcs::STATUS_OVERFLOW: | |
10387 | gold_error_at_location(relinfo, relnum, reloc.get_r_offset(), | |
c3847462 VR |
10388 | _("relocation overflow: " |
10389 | "%u against local symbol %u in %s"), | |
10390 | r_type, r_sym, object->name().c_str()); | |
9810d34d SS |
10391 | break; |
10392 | case Reloc_funcs::STATUS_BAD_RELOC: | |
10393 | gold_error_at_location(relinfo, relnum, reloc.get_r_offset(), | |
10394 | _("unexpected opcode while processing relocation")); | |
10395 | break; | |
10396 | default: | |
10397 | gold_unreachable(); | |
10398 | } | |
10399 | } | |
10400 | ||
10401 | // Optimize the TLS relocation type based on what we know about the | |
10402 | // symbol. IS_FINAL is true if the final address of this symbol is | |
10403 | // known at link time. | |
10404 | ||
10405 | template<int size, bool big_endian> | |
10406 | tls::Tls_optimization | |
10407 | Target_mips<size, big_endian>::optimize_tls_reloc(bool, int) | |
10408 | { | |
10409 | // FIXME: Currently we do not do any TLS optimization. | |
10410 | return tls::TLSOPT_NONE; | |
10411 | } | |
10412 | ||
10413 | // Scan a relocation for a local symbol. | |
10414 | ||
10415 | template<int size, bool big_endian> | |
10416 | inline void | |
10417 | Target_mips<size, big_endian>::Scan::local( | |
10418 | Symbol_table* symtab, | |
10419 | Layout* layout, | |
10420 | Target_mips<size, big_endian>* target, | |
10421 | Sized_relobj_file<size, big_endian>* object, | |
10422 | unsigned int data_shndx, | |
10423 | Output_section* output_section, | |
4d625b70 CC |
10424 | const Relatype* rela, |
10425 | const Reltype* rel, | |
9810d34d SS |
10426 | unsigned int rel_type, |
10427 | unsigned int r_type, | |
10428 | const elfcpp::Sym<size, big_endian>& lsym, | |
10429 | bool is_discarded) | |
10430 | { | |
10431 | if (is_discarded) | |
10432 | return; | |
10433 | ||
10434 | Mips_address r_offset; | |
4d625b70 | 10435 | unsigned int r_sym; |
9810d34d SS |
10436 | typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
10437 | ||
10438 | if (rel_type == elfcpp::SHT_RELA) | |
10439 | { | |
10440 | r_offset = rela->get_r_offset(); | |
4d625b70 CC |
10441 | r_sym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: |
10442 | get_r_sym(rela); | |
9810d34d SS |
10443 | r_addend = rela->get_r_addend(); |
10444 | } | |
10445 | else | |
10446 | { | |
10447 | r_offset = rel->get_r_offset(); | |
4d625b70 CC |
10448 | r_sym = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: |
10449 | get_r_sym(rel); | |
9810d34d SS |
10450 | r_addend = 0; |
10451 | } | |
10452 | ||
9810d34d SS |
10453 | Mips_relobj<size, big_endian>* mips_obj = |
10454 | Mips_relobj<size, big_endian>::as_mips_relobj(object); | |
10455 | ||
10456 | if (mips_obj->is_mips16_stub_section(data_shndx)) | |
10457 | { | |
10458 | mips_obj->get_mips16_stub_section(data_shndx) | |
10459 | ->new_local_reloc_found(r_type, r_sym); | |
10460 | } | |
10461 | ||
10462 | if (r_type == elfcpp::R_MIPS_NONE) | |
10463 | // R_MIPS_NONE is used in mips16 stub sections, to define the target of the | |
10464 | // mips16 stub. | |
10465 | return; | |
10466 | ||
10467 | if (!mips16_call_reloc(r_type) | |
10468 | && !mips_obj->section_allows_mips16_refs(data_shndx)) | |
10469 | // This reloc would need to refer to a MIPS16 hard-float stub, if | |
10470 | // there is one. We ignore MIPS16 stub sections and .pdr section when | |
10471 | // looking for relocs that would need to refer to MIPS16 stubs. | |
10472 | mips_obj->add_local_non_16bit_call(r_sym); | |
10473 | ||
10474 | if (r_type == elfcpp::R_MIPS16_26 | |
10475 | && !mips_obj->section_allows_mips16_refs(data_shndx)) | |
10476 | mips_obj->add_local_16bit_call(r_sym); | |
10477 | ||
10478 | switch (r_type) | |
10479 | { | |
10480 | case elfcpp::R_MIPS_GOT16: | |
10481 | case elfcpp::R_MIPS_CALL16: | |
10482 | case elfcpp::R_MIPS_CALL_HI16: | |
10483 | case elfcpp::R_MIPS_CALL_LO16: | |
10484 | case elfcpp::R_MIPS_GOT_HI16: | |
10485 | case elfcpp::R_MIPS_GOT_LO16: | |
10486 | case elfcpp::R_MIPS_GOT_PAGE: | |
10487 | case elfcpp::R_MIPS_GOT_OFST: | |
10488 | case elfcpp::R_MIPS_GOT_DISP: | |
10489 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
10490 | case elfcpp::R_MIPS_TLS_GD: | |
10491 | case elfcpp::R_MIPS_TLS_LDM: | |
10492 | case elfcpp::R_MIPS16_GOT16: | |
10493 | case elfcpp::R_MIPS16_CALL16: | |
10494 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
10495 | case elfcpp::R_MIPS16_TLS_GD: | |
10496 | case elfcpp::R_MIPS16_TLS_LDM: | |
10497 | case elfcpp::R_MICROMIPS_GOT16: | |
10498 | case elfcpp::R_MICROMIPS_CALL16: | |
10499 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
10500 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
10501 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
10502 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
10503 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
10504 | case elfcpp::R_MICROMIPS_GOT_OFST: | |
10505 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
10506 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
10507 | case elfcpp::R_MICROMIPS_TLS_GD: | |
10508 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
47a9f4fc | 10509 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
10510 | // We need a GOT section. |
10511 | target->got_section(symtab, layout); | |
10512 | break; | |
10513 | ||
10514 | default: | |
10515 | break; | |
10516 | } | |
10517 | ||
10518 | if (call_lo16_reloc(r_type) | |
10519 | || got_lo16_reloc(r_type) | |
47a9f4fc VR |
10520 | || got_disp_reloc(r_type) |
10521 | || eh_reloc(r_type)) | |
9810d34d SS |
10522 | { |
10523 | // We may need a local GOT entry for this relocation. We | |
10524 | // don't count R_MIPS_GOT_PAGE because we can estimate the | |
10525 | // maximum number of pages needed by looking at the size of | |
10526 | // the segment. Similar comments apply to R_MIPS*_GOT16 and | |
10527 | // R_MIPS*_CALL16. We don't count R_MIPS_GOT_HI16, or | |
10528 | // R_MIPS_CALL_HI16 because these are always followed by an | |
10529 | // R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16. | |
10530 | Mips_output_data_got<size, big_endian>* got = | |
10531 | target->got_section(symtab, layout); | |
47a9f4fc VR |
10532 | bool is_section_symbol = lsym.get_st_type() == elfcpp::STT_SECTION; |
10533 | got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type, -1U, | |
10534 | is_section_symbol); | |
9810d34d SS |
10535 | } |
10536 | ||
10537 | switch (r_type) | |
10538 | { | |
10539 | case elfcpp::R_MIPS_CALL16: | |
10540 | case elfcpp::R_MIPS16_CALL16: | |
10541 | case elfcpp::R_MICROMIPS_CALL16: | |
10542 | gold_error(_("CALL16 reloc at 0x%lx not against global symbol "), | |
10543 | (unsigned long)r_offset); | |
10544 | return; | |
10545 | ||
10546 | case elfcpp::R_MIPS_GOT_PAGE: | |
10547 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
10548 | case elfcpp::R_MIPS16_GOT16: | |
10549 | case elfcpp::R_MIPS_GOT16: | |
10550 | case elfcpp::R_MIPS_GOT_HI16: | |
10551 | case elfcpp::R_MIPS_GOT_LO16: | |
10552 | case elfcpp::R_MICROMIPS_GOT16: | |
10553 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
10554 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
10555 | { | |
10556 | // This relocation needs a page entry in the GOT. | |
10557 | // Get the section contents. | |
10558 | section_size_type view_size = 0; | |
10559 | const unsigned char* view = object->section_contents(data_shndx, | |
10560 | &view_size, false); | |
10561 | view += r_offset; | |
10562 | ||
10563 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
10564 | Valtype32 addend = (rel_type == elfcpp::SHT_REL ? val & 0xffff | |
10565 | : r_addend); | |
10566 | ||
10567 | if (rel_type == elfcpp::SHT_REL && got16_reloc(r_type)) | |
10568 | target->got16_addends_.push_back(got16_addend<size, big_endian>( | |
10569 | object, data_shndx, r_type, r_sym, addend)); | |
10570 | else | |
10571 | target->got_section()->record_got_page_entry(mips_obj, r_sym, addend); | |
10572 | break; | |
10573 | } | |
10574 | ||
10575 | case elfcpp::R_MIPS_HI16: | |
f5b11759 | 10576 | case elfcpp::R_MIPS_PCHI16: |
9810d34d SS |
10577 | case elfcpp::R_MIPS16_HI16: |
10578 | case elfcpp::R_MICROMIPS_HI16: | |
10579 | // Record the reloc so that we can check whether the corresponding LO16 | |
10580 | // part exists. | |
10581 | if (rel_type == elfcpp::SHT_REL) | |
10582 | target->got16_addends_.push_back(got16_addend<size, big_endian>( | |
10583 | object, data_shndx, r_type, r_sym, 0)); | |
10584 | break; | |
10585 | ||
10586 | case elfcpp::R_MIPS_LO16: | |
f5b11759 | 10587 | case elfcpp::R_MIPS_PCLO16: |
9810d34d SS |
10588 | case elfcpp::R_MIPS16_LO16: |
10589 | case elfcpp::R_MICROMIPS_LO16: | |
10590 | { | |
10591 | if (rel_type != elfcpp::SHT_REL) | |
10592 | break; | |
10593 | ||
10594 | // Find corresponding GOT16/HI16 relocation. | |
10595 | ||
10596 | // According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must | |
10597 | // be immediately following. However, for the IRIX6 ABI, the next | |
10598 | // relocation may be a composed relocation consisting of several | |
10599 | // relocations for the same address. In that case, the R_MIPS_LO16 | |
10600 | // relocation may occur as one of these. We permit a similar | |
10601 | // extension in general, as that is useful for GCC. | |
10602 | ||
10603 | // In some cases GCC dead code elimination removes the LO16 but | |
10604 | // keeps the corresponding HI16. This is strictly speaking a | |
10605 | // violation of the ABI but not immediately harmful. | |
10606 | ||
10607 | typename std::list<got16_addend<size, big_endian> >::iterator it = | |
10608 | target->got16_addends_.begin(); | |
10609 | while (it != target->got16_addends_.end()) | |
10610 | { | |
10611 | got16_addend<size, big_endian> _got16_addend = *it; | |
10612 | ||
10613 | // TODO(sasa): Split got16_addends_ list into two lists - one for | |
10614 | // GOT16 relocs and the other for HI16 relocs. | |
10615 | ||
10616 | // Report an error if we find HI16 or GOT16 reloc from the | |
10617 | // previous section without the matching LO16 part. | |
10618 | if (_got16_addend.object != object | |
10619 | || _got16_addend.shndx != data_shndx) | |
10620 | { | |
10621 | gold_error("Can't find matching LO16 reloc"); | |
10622 | break; | |
10623 | } | |
10624 | ||
10625 | if (_got16_addend.r_sym != r_sym | |
10626 | || !is_matching_lo16_reloc(_got16_addend.r_type, r_type)) | |
10627 | { | |
10628 | ++it; | |
10629 | continue; | |
10630 | } | |
10631 | ||
10632 | // We found a matching HI16 or GOT16 reloc for this LO16 reloc. | |
10633 | // For GOT16, we need to calculate combined addend and record GOT page | |
10634 | // entry. | |
10635 | if (got16_reloc(_got16_addend.r_type)) | |
10636 | { | |
10637 | ||
10638 | section_size_type view_size = 0; | |
10639 | const unsigned char* view = object->section_contents(data_shndx, | |
10640 | &view_size, | |
10641 | false); | |
10642 | view += r_offset; | |
10643 | ||
10644 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
10645 | int32_t addend = Bits<16>::sign_extend32(val & 0xffff); | |
10646 | ||
10647 | addend = (_got16_addend.addend << 16) + addend; | |
10648 | target->got_section()->record_got_page_entry(mips_obj, r_sym, | |
10649 | addend); | |
10650 | } | |
10651 | ||
10652 | it = target->got16_addends_.erase(it); | |
10653 | } | |
10654 | break; | |
10655 | } | |
10656 | } | |
10657 | ||
10658 | switch (r_type) | |
10659 | { | |
10660 | case elfcpp::R_MIPS_32: | |
10661 | case elfcpp::R_MIPS_REL32: | |
10662 | case elfcpp::R_MIPS_64: | |
10663 | { | |
10664 | if (parameters->options().output_is_position_independent()) | |
10665 | { | |
10666 | // If building a shared library (or a position-independent | |
10667 | // executable), we need to create a dynamic relocation for | |
10668 | // this location. | |
47a9f4fc VR |
10669 | if (is_readonly_section(output_section)) |
10670 | break; | |
9810d34d | 10671 | Reloc_section* rel_dyn = target->rel_dyn_section(layout); |
9810d34d SS |
10672 | rel_dyn->add_symbolless_local_addend(object, r_sym, |
10673 | elfcpp::R_MIPS_REL32, | |
10674 | output_section, data_shndx, | |
10675 | r_offset); | |
10676 | } | |
10677 | break; | |
10678 | } | |
10679 | ||
10680 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
10681 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
10682 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
10683 | case elfcpp::R_MIPS_TLS_LDM: | |
10684 | case elfcpp::R_MIPS16_TLS_LDM: | |
10685 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
10686 | case elfcpp::R_MIPS_TLS_GD: | |
10687 | case elfcpp::R_MIPS16_TLS_GD: | |
10688 | case elfcpp::R_MICROMIPS_TLS_GD: | |
10689 | { | |
9810d34d SS |
10690 | bool output_is_shared = parameters->options().shared(); |
10691 | const tls::Tls_optimization optimized_type | |
10692 | = Target_mips<size, big_endian>::optimize_tls_reloc( | |
10693 | !output_is_shared, r_type); | |
10694 | switch (r_type) | |
10695 | { | |
10696 | case elfcpp::R_MIPS_TLS_GD: | |
10697 | case elfcpp::R_MIPS16_TLS_GD: | |
10698 | case elfcpp::R_MICROMIPS_TLS_GD: | |
10699 | if (optimized_type == tls::TLSOPT_NONE) | |
10700 | { | |
10701 | // Create a pair of GOT entries for the module index and | |
10702 | // dtv-relative offset. | |
10703 | Mips_output_data_got<size, big_endian>* got = | |
10704 | target->got_section(symtab, layout); | |
10705 | unsigned int shndx = lsym.get_st_shndx(); | |
10706 | bool is_ordinary; | |
10707 | shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); | |
10708 | if (!is_ordinary) | |
10709 | { | |
10710 | object->error(_("local symbol %u has bad shndx %u"), | |
10711 | r_sym, shndx); | |
10712 | break; | |
10713 | } | |
10714 | got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type, | |
47a9f4fc | 10715 | shndx, false); |
9810d34d SS |
10716 | } |
10717 | else | |
10718 | { | |
10719 | // FIXME: TLS optimization not supported yet. | |
10720 | gold_unreachable(); | |
10721 | } | |
10722 | break; | |
10723 | ||
10724 | case elfcpp::R_MIPS_TLS_LDM: | |
10725 | case elfcpp::R_MIPS16_TLS_LDM: | |
10726 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
10727 | if (optimized_type == tls::TLSOPT_NONE) | |
10728 | { | |
10729 | // We always record LDM symbols as local with index 0. | |
10730 | target->got_section()->record_local_got_symbol(mips_obj, 0, | |
10731 | r_addend, r_type, | |
47a9f4fc | 10732 | -1U, false); |
9810d34d SS |
10733 | } |
10734 | else | |
10735 | { | |
10736 | // FIXME: TLS optimization not supported yet. | |
10737 | gold_unreachable(); | |
10738 | } | |
10739 | break; | |
10740 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
10741 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
10742 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
10743 | layout->set_has_static_tls(); | |
10744 | if (optimized_type == tls::TLSOPT_NONE) | |
10745 | { | |
10746 | // Create a GOT entry for the tp-relative offset. | |
10747 | Mips_output_data_got<size, big_endian>* got = | |
10748 | target->got_section(symtab, layout); | |
10749 | got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type, | |
47a9f4fc | 10750 | -1U, false); |
9810d34d SS |
10751 | } |
10752 | else | |
10753 | { | |
10754 | // FIXME: TLS optimization not supported yet. | |
10755 | gold_unreachable(); | |
10756 | } | |
10757 | break; | |
10758 | ||
10759 | default: | |
10760 | gold_unreachable(); | |
10761 | } | |
10762 | } | |
10763 | break; | |
10764 | ||
10765 | default: | |
10766 | break; | |
10767 | } | |
10768 | ||
10769 | // Refuse some position-dependent relocations when creating a | |
10770 | // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're | |
10771 | // not PIC, but we can create dynamic relocations and the result | |
10772 | // will be fine. Also do not refuse R_MIPS_LO16, which can be | |
10773 | // combined with R_MIPS_GOT16. | |
10774 | if (parameters->options().shared()) | |
10775 | { | |
10776 | switch (r_type) | |
10777 | { | |
10778 | case elfcpp::R_MIPS16_HI16: | |
10779 | case elfcpp::R_MIPS_HI16: | |
e242ece1 VR |
10780 | case elfcpp::R_MIPS_HIGHER: |
10781 | case elfcpp::R_MIPS_HIGHEST: | |
9810d34d | 10782 | case elfcpp::R_MICROMIPS_HI16: |
e242ece1 VR |
10783 | case elfcpp::R_MICROMIPS_HIGHER: |
10784 | case elfcpp::R_MICROMIPS_HIGHEST: | |
9810d34d SS |
10785 | // Don't refuse a high part relocation if it's against |
10786 | // no symbol (e.g. part of a compound relocation). | |
10787 | if (r_sym == 0) | |
10788 | break; | |
d8e90251 | 10789 | // Fall through. |
9810d34d SS |
10790 | |
10791 | case elfcpp::R_MIPS16_26: | |
10792 | case elfcpp::R_MIPS_26: | |
10793 | case elfcpp::R_MICROMIPS_26_S1: | |
10794 | gold_error(_("%s: relocation %u against `%s' can not be used when " | |
10795 | "making a shared object; recompile with -fPIC"), | |
10796 | object->name().c_str(), r_type, "a local symbol"); | |
10797 | default: | |
10798 | break; | |
10799 | } | |
10800 | } | |
10801 | } | |
10802 | ||
10803 | template<int size, bool big_endian> | |
10804 | inline void | |
10805 | Target_mips<size, big_endian>::Scan::local( | |
10806 | Symbol_table* symtab, | |
10807 | Layout* layout, | |
10808 | Target_mips<size, big_endian>* target, | |
10809 | Sized_relobj_file<size, big_endian>* object, | |
10810 | unsigned int data_shndx, | |
10811 | Output_section* output_section, | |
4d625b70 | 10812 | const Reltype& reloc, |
9810d34d SS |
10813 | unsigned int r_type, |
10814 | const elfcpp::Sym<size, big_endian>& lsym, | |
10815 | bool is_discarded) | |
10816 | { | |
10817 | if (is_discarded) | |
10818 | return; | |
10819 | ||
10820 | local( | |
10821 | symtab, | |
10822 | layout, | |
10823 | target, | |
10824 | object, | |
10825 | data_shndx, | |
10826 | output_section, | |
4d625b70 | 10827 | (const Relatype*) NULL, |
9810d34d SS |
10828 | &reloc, |
10829 | elfcpp::SHT_REL, | |
10830 | r_type, | |
10831 | lsym, is_discarded); | |
10832 | } | |
10833 | ||
10834 | ||
10835 | template<int size, bool big_endian> | |
10836 | inline void | |
10837 | Target_mips<size, big_endian>::Scan::local( | |
10838 | Symbol_table* symtab, | |
10839 | Layout* layout, | |
10840 | Target_mips<size, big_endian>* target, | |
10841 | Sized_relobj_file<size, big_endian>* object, | |
10842 | unsigned int data_shndx, | |
10843 | Output_section* output_section, | |
4d625b70 | 10844 | const Relatype& reloc, |
9810d34d SS |
10845 | unsigned int r_type, |
10846 | const elfcpp::Sym<size, big_endian>& lsym, | |
10847 | bool is_discarded) | |
10848 | { | |
10849 | if (is_discarded) | |
10850 | return; | |
10851 | ||
10852 | local( | |
10853 | symtab, | |
10854 | layout, | |
10855 | target, | |
10856 | object, | |
10857 | data_shndx, | |
10858 | output_section, | |
10859 | &reloc, | |
4d625b70 | 10860 | (const Reltype*) NULL, |
9810d34d SS |
10861 | elfcpp::SHT_RELA, |
10862 | r_type, | |
10863 | lsym, is_discarded); | |
10864 | } | |
10865 | ||
10866 | // Scan a relocation for a global symbol. | |
10867 | ||
10868 | template<int size, bool big_endian> | |
10869 | inline void | |
10870 | Target_mips<size, big_endian>::Scan::global( | |
10871 | Symbol_table* symtab, | |
10872 | Layout* layout, | |
10873 | Target_mips<size, big_endian>* target, | |
10874 | Sized_relobj_file<size, big_endian>* object, | |
10875 | unsigned int data_shndx, | |
10876 | Output_section* output_section, | |
4d625b70 CC |
10877 | const Relatype* rela, |
10878 | const Reltype* rel, | |
9810d34d SS |
10879 | unsigned int rel_type, |
10880 | unsigned int r_type, | |
10881 | Symbol* gsym) | |
10882 | { | |
10883 | Mips_address r_offset; | |
4d625b70 | 10884 | unsigned int r_sym; |
9810d34d SS |
10885 | typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
10886 | ||
10887 | if (rel_type == elfcpp::SHT_RELA) | |
10888 | { | |
10889 | r_offset = rela->get_r_offset(); | |
4d625b70 CC |
10890 | r_sym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: |
10891 | get_r_sym(rela); | |
9810d34d SS |
10892 | r_addend = rela->get_r_addend(); |
10893 | } | |
10894 | else | |
10895 | { | |
10896 | r_offset = rel->get_r_offset(); | |
4d625b70 CC |
10897 | r_sym = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: |
10898 | get_r_sym(rel); | |
9810d34d SS |
10899 | r_addend = 0; |
10900 | } | |
10901 | ||
9810d34d SS |
10902 | Mips_relobj<size, big_endian>* mips_obj = |
10903 | Mips_relobj<size, big_endian>::as_mips_relobj(object); | |
10904 | Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym); | |
10905 | ||
10906 | if (mips_obj->is_mips16_stub_section(data_shndx)) | |
10907 | { | |
10908 | mips_obj->get_mips16_stub_section(data_shndx) | |
10909 | ->new_global_reloc_found(r_type, mips_sym); | |
10910 | } | |
10911 | ||
10912 | if (r_type == elfcpp::R_MIPS_NONE) | |
10913 | // R_MIPS_NONE is used in mips16 stub sections, to define the target of the | |
10914 | // mips16 stub. | |
10915 | return; | |
10916 | ||
10917 | if (!mips16_call_reloc(r_type) | |
10918 | && !mips_obj->section_allows_mips16_refs(data_shndx)) | |
10919 | // This reloc would need to refer to a MIPS16 hard-float stub, if | |
10920 | // there is one. We ignore MIPS16 stub sections and .pdr section when | |
10921 | // looking for relocs that would need to refer to MIPS16 stubs. | |
10922 | mips_sym->set_need_fn_stub(); | |
10923 | ||
9810d34d SS |
10924 | // We need PLT entries if there are static-only relocations against |
10925 | // an externally-defined function. This can technically occur for | |
10926 | // shared libraries if there are branches to the symbol, although it | |
10927 | // is unlikely that this will be used in practice due to the short | |
10928 | // ranges involved. It can occur for any relative or absolute relocation | |
10929 | // in executables; in that case, the PLT entry becomes the function's | |
10930 | // canonical address. | |
10931 | bool static_reloc = false; | |
10932 | ||
10933 | // Set CAN_MAKE_DYNAMIC to true if we can convert this | |
10934 | // relocation into a dynamic one. | |
10935 | bool can_make_dynamic = false; | |
10936 | switch (r_type) | |
10937 | { | |
10938 | case elfcpp::R_MIPS_GOT16: | |
10939 | case elfcpp::R_MIPS_CALL16: | |
10940 | case elfcpp::R_MIPS_CALL_HI16: | |
10941 | case elfcpp::R_MIPS_CALL_LO16: | |
10942 | case elfcpp::R_MIPS_GOT_HI16: | |
10943 | case elfcpp::R_MIPS_GOT_LO16: | |
10944 | case elfcpp::R_MIPS_GOT_PAGE: | |
10945 | case elfcpp::R_MIPS_GOT_OFST: | |
10946 | case elfcpp::R_MIPS_GOT_DISP: | |
10947 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
10948 | case elfcpp::R_MIPS_TLS_GD: | |
10949 | case elfcpp::R_MIPS_TLS_LDM: | |
10950 | case elfcpp::R_MIPS16_GOT16: | |
10951 | case elfcpp::R_MIPS16_CALL16: | |
10952 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
10953 | case elfcpp::R_MIPS16_TLS_GD: | |
10954 | case elfcpp::R_MIPS16_TLS_LDM: | |
10955 | case elfcpp::R_MICROMIPS_GOT16: | |
10956 | case elfcpp::R_MICROMIPS_CALL16: | |
10957 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
10958 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
10959 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
10960 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
10961 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
10962 | case elfcpp::R_MICROMIPS_GOT_OFST: | |
10963 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
10964 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
10965 | case elfcpp::R_MICROMIPS_TLS_GD: | |
10966 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
47a9f4fc | 10967 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
10968 | // We need a GOT section. |
10969 | target->got_section(symtab, layout); | |
10970 | break; | |
10971 | ||
10972 | // This is just a hint; it can safely be ignored. Don't set | |
10973 | // has_static_relocs for the corresponding symbol. | |
10974 | case elfcpp::R_MIPS_JALR: | |
10975 | case elfcpp::R_MICROMIPS_JALR: | |
10976 | break; | |
10977 | ||
10978 | case elfcpp::R_MIPS_GPREL16: | |
10979 | case elfcpp::R_MIPS_GPREL32: | |
10980 | case elfcpp::R_MIPS16_GPREL: | |
10981 | case elfcpp::R_MICROMIPS_GPREL16: | |
10982 | // TODO(sasa) | |
10983 | // GP-relative relocations always resolve to a definition in a | |
10984 | // regular input file, ignoring the one-definition rule. This is | |
10985 | // important for the GP setup sequence in NewABI code, which | |
10986 | // always resolves to a local function even if other relocations | |
10987 | // against the symbol wouldn't. | |
10988 | //constrain_symbol_p = FALSE; | |
10989 | break; | |
10990 | ||
10991 | case elfcpp::R_MIPS_32: | |
10992 | case elfcpp::R_MIPS_REL32: | |
10993 | case elfcpp::R_MIPS_64: | |
47a9f4fc VR |
10994 | if ((parameters->options().shared() |
10995 | || (strcmp(gsym->name(), "__gnu_local_gp") != 0 | |
10996 | && (!is_readonly_section(output_section) | |
10997 | || mips_obj->is_pic()))) | |
10998 | && (output_section->flags() & elfcpp::SHF_ALLOC) != 0) | |
9810d34d SS |
10999 | { |
11000 | if (r_type != elfcpp::R_MIPS_REL32) | |
47a9f4fc | 11001 | mips_sym->set_pointer_equality_needed(); |
9810d34d SS |
11002 | can_make_dynamic = true; |
11003 | break; | |
11004 | } | |
11005 | // Fall through. | |
11006 | ||
11007 | default: | |
11008 | // Most static relocations require pointer equality, except | |
11009 | // for branches. | |
11010 | mips_sym->set_pointer_equality_needed(); | |
9810d34d SS |
11011 | // Fall through. |
11012 | ||
11013 | case elfcpp::R_MIPS_26: | |
11014 | case elfcpp::R_MIPS_PC16: | |
f5b11759 VR |
11015 | case elfcpp::R_MIPS_PC21_S2: |
11016 | case elfcpp::R_MIPS_PC26_S2: | |
9810d34d SS |
11017 | case elfcpp::R_MIPS16_26: |
11018 | case elfcpp::R_MICROMIPS_26_S1: | |
11019 | case elfcpp::R_MICROMIPS_PC7_S1: | |
11020 | case elfcpp::R_MICROMIPS_PC10_S1: | |
11021 | case elfcpp::R_MICROMIPS_PC16_S1: | |
11022 | case elfcpp::R_MICROMIPS_PC23_S2: | |
11023 | static_reloc = true; | |
11024 | mips_sym->set_has_static_relocs(); | |
11025 | break; | |
11026 | } | |
11027 | ||
11028 | // If there are call relocations against an externally-defined symbol, | |
11029 | // see whether we can create a MIPS lazy-binding stub for it. We can | |
11030 | // only do this if all references to the function are through call | |
11031 | // relocations, and in that case, the traditional lazy-binding stubs | |
11032 | // are much more efficient than PLT entries. | |
11033 | switch (r_type) | |
11034 | { | |
11035 | case elfcpp::R_MIPS16_CALL16: | |
11036 | case elfcpp::R_MIPS_CALL16: | |
11037 | case elfcpp::R_MIPS_CALL_HI16: | |
11038 | case elfcpp::R_MIPS_CALL_LO16: | |
11039 | case elfcpp::R_MIPS_JALR: | |
11040 | case elfcpp::R_MICROMIPS_CALL16: | |
11041 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
11042 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
11043 | case elfcpp::R_MICROMIPS_JALR: | |
11044 | if (!mips_sym->no_lazy_stub()) | |
11045 | { | |
11046 | if ((mips_sym->needs_plt_entry() && mips_sym->is_from_dynobj()) | |
11047 | // Calls from shared objects to undefined symbols of type | |
11048 | // STT_NOTYPE need lazy-binding stub. | |
11049 | || (mips_sym->is_undefined() && parameters->options().shared())) | |
11050 | target->mips_stubs_section(layout)->make_entry(mips_sym); | |
11051 | } | |
11052 | break; | |
11053 | default: | |
11054 | { | |
11055 | // We must not create a stub for a symbol that has relocations | |
11056 | // related to taking the function's address. | |
11057 | mips_sym->set_no_lazy_stub(); | |
11058 | target->remove_lazy_stub_entry(mips_sym); | |
11059 | break; | |
11060 | } | |
11061 | } | |
11062 | ||
11063 | if (relocation_needs_la25_stub<size, big_endian>(mips_obj, r_type, | |
11064 | mips_sym->is_mips16())) | |
11065 | mips_sym->set_has_nonpic_branches(); | |
11066 | ||
11067 | // R_MIPS_HI16 against _gp_disp is used for $gp setup, | |
11068 | // and has a special meaning. | |
11069 | bool gp_disp_against_hi16 = (!mips_obj->is_newabi() | |
11070 | && strcmp(gsym->name(), "_gp_disp") == 0 | |
11071 | && (hi16_reloc(r_type) || lo16_reloc(r_type))); | |
11072 | if (static_reloc && gsym->needs_plt_entry()) | |
11073 | { | |
11074 | target->make_plt_entry(symtab, layout, mips_sym, r_type); | |
11075 | ||
11076 | // Since this is not a PC-relative relocation, we may be | |
11077 | // taking the address of a function. In that case we need to | |
11078 | // set the entry in the dynamic symbol table to the address of | |
11079 | // the PLT entry. | |
11080 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
11081 | { | |
11082 | gsym->set_needs_dynsym_value(); | |
11083 | // We distinguish between PLT entries and lazy-binding stubs by | |
11084 | // giving the former an st_other value of STO_MIPS_PLT. Set the | |
11085 | // flag if there are any relocations in the binary where pointer | |
11086 | // equality matters. | |
11087 | if (mips_sym->pointer_equality_needed()) | |
11088 | mips_sym->set_mips_plt(); | |
11089 | } | |
11090 | } | |
11091 | if ((static_reloc || can_make_dynamic) && !gp_disp_against_hi16) | |
11092 | { | |
11093 | // Absolute addressing relocations. | |
11094 | // Make a dynamic relocation if necessary. | |
11095 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) | |
11096 | { | |
11097 | if (gsym->may_need_copy_reloc()) | |
11098 | { | |
47a9f4fc VR |
11099 | target->copy_reloc(symtab, layout, object, data_shndx, |
11100 | output_section, gsym, r_type, r_offset); | |
9810d34d SS |
11101 | } |
11102 | else if (can_make_dynamic) | |
11103 | { | |
11104 | // Create .rel.dyn section. | |
11105 | target->rel_dyn_section(layout); | |
11106 | target->dynamic_reloc(mips_sym, elfcpp::R_MIPS_REL32, mips_obj, | |
11107 | data_shndx, output_section, r_offset); | |
11108 | } | |
11109 | else | |
11110 | gold_error(_("non-dynamic relocations refer to dynamic symbol %s"), | |
11111 | gsym->name()); | |
11112 | } | |
11113 | } | |
11114 | ||
11115 | bool for_call = false; | |
11116 | switch (r_type) | |
11117 | { | |
11118 | case elfcpp::R_MIPS_CALL16: | |
11119 | case elfcpp::R_MIPS16_CALL16: | |
11120 | case elfcpp::R_MICROMIPS_CALL16: | |
11121 | case elfcpp::R_MIPS_CALL_HI16: | |
11122 | case elfcpp::R_MIPS_CALL_LO16: | |
11123 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
11124 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
11125 | for_call = true; | |
11126 | // Fall through. | |
11127 | ||
11128 | case elfcpp::R_MIPS16_GOT16: | |
11129 | case elfcpp::R_MIPS_GOT16: | |
11130 | case elfcpp::R_MIPS_GOT_HI16: | |
11131 | case elfcpp::R_MIPS_GOT_LO16: | |
11132 | case elfcpp::R_MICROMIPS_GOT16: | |
11133 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
11134 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
11135 | case elfcpp::R_MIPS_GOT_DISP: | |
11136 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
47a9f4fc | 11137 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
11138 | { |
11139 | // The symbol requires a GOT entry. | |
11140 | Mips_output_data_got<size, big_endian>* got = | |
11141 | target->got_section(symtab, layout); | |
11142 | got->record_global_got_symbol(mips_sym, mips_obj, r_type, false, | |
11143 | for_call); | |
11144 | mips_sym->set_global_got_area(GGA_NORMAL); | |
11145 | } | |
11146 | break; | |
11147 | ||
11148 | case elfcpp::R_MIPS_GOT_PAGE: | |
11149 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
11150 | { | |
11151 | // This relocation needs a page entry in the GOT. | |
11152 | // Get the section contents. | |
11153 | section_size_type view_size = 0; | |
11154 | const unsigned char* view = | |
11155 | object->section_contents(data_shndx, &view_size, false); | |
11156 | view += r_offset; | |
11157 | ||
11158 | Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view); | |
11159 | Valtype32 addend = (rel_type == elfcpp::SHT_REL ? val & 0xffff | |
11160 | : r_addend); | |
11161 | Mips_output_data_got<size, big_endian>* got = | |
11162 | target->got_section(symtab, layout); | |
11163 | got->record_got_page_entry(mips_obj, r_sym, addend); | |
11164 | ||
11165 | // If this is a global, overridable symbol, GOT_PAGE will | |
11166 | // decay to GOT_DISP, so we'll need a GOT entry for it. | |
11167 | bool def_regular = (mips_sym->source() == Symbol::FROM_OBJECT | |
11168 | && !mips_sym->object()->is_dynamic() | |
11169 | && !mips_sym->is_undefined()); | |
11170 | if (!def_regular | |
11171 | || (parameters->options().output_is_position_independent() | |
11172 | && !parameters->options().Bsymbolic() | |
11173 | && !mips_sym->is_forced_local())) | |
11174 | { | |
11175 | got->record_global_got_symbol(mips_sym, mips_obj, r_type, false, | |
11176 | for_call); | |
11177 | mips_sym->set_global_got_area(GGA_NORMAL); | |
11178 | } | |
11179 | } | |
11180 | break; | |
11181 | ||
11182 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
11183 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
11184 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
11185 | case elfcpp::R_MIPS_TLS_LDM: | |
11186 | case elfcpp::R_MIPS16_TLS_LDM: | |
11187 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
11188 | case elfcpp::R_MIPS_TLS_GD: | |
11189 | case elfcpp::R_MIPS16_TLS_GD: | |
11190 | case elfcpp::R_MICROMIPS_TLS_GD: | |
11191 | { | |
11192 | const bool is_final = gsym->final_value_is_known(); | |
11193 | const tls::Tls_optimization optimized_type = | |
11194 | Target_mips<size, big_endian>::optimize_tls_reloc(is_final, r_type); | |
11195 | ||
11196 | switch (r_type) | |
11197 | { | |
11198 | case elfcpp::R_MIPS_TLS_GD: | |
11199 | case elfcpp::R_MIPS16_TLS_GD: | |
11200 | case elfcpp::R_MICROMIPS_TLS_GD: | |
11201 | if (optimized_type == tls::TLSOPT_NONE) | |
11202 | { | |
11203 | // Create a pair of GOT entries for the module index and | |
11204 | // dtv-relative offset. | |
11205 | Mips_output_data_got<size, big_endian>* got = | |
11206 | target->got_section(symtab, layout); | |
11207 | got->record_global_got_symbol(mips_sym, mips_obj, r_type, false, | |
11208 | false); | |
11209 | } | |
11210 | else | |
11211 | { | |
11212 | // FIXME: TLS optimization not supported yet. | |
11213 | gold_unreachable(); | |
11214 | } | |
11215 | break; | |
11216 | ||
11217 | case elfcpp::R_MIPS_TLS_LDM: | |
11218 | case elfcpp::R_MIPS16_TLS_LDM: | |
11219 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
11220 | if (optimized_type == tls::TLSOPT_NONE) | |
11221 | { | |
11222 | // We always record LDM symbols as local with index 0. | |
11223 | target->got_section()->record_local_got_symbol(mips_obj, 0, | |
11224 | r_addend, r_type, | |
47a9f4fc | 11225 | -1U, false); |
9810d34d SS |
11226 | } |
11227 | else | |
11228 | { | |
11229 | // FIXME: TLS optimization not supported yet. | |
11230 | gold_unreachable(); | |
11231 | } | |
11232 | break; | |
11233 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
11234 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
11235 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
11236 | layout->set_has_static_tls(); | |
11237 | if (optimized_type == tls::TLSOPT_NONE) | |
11238 | { | |
11239 | // Create a GOT entry for the tp-relative offset. | |
11240 | Mips_output_data_got<size, big_endian>* got = | |
11241 | target->got_section(symtab, layout); | |
11242 | got->record_global_got_symbol(mips_sym, mips_obj, r_type, false, | |
11243 | false); | |
11244 | } | |
11245 | else | |
11246 | { | |
11247 | // FIXME: TLS optimization not supported yet. | |
11248 | gold_unreachable(); | |
11249 | } | |
11250 | break; | |
11251 | ||
11252 | default: | |
11253 | gold_unreachable(); | |
11254 | } | |
11255 | } | |
11256 | break; | |
11257 | case elfcpp::R_MIPS_COPY: | |
11258 | case elfcpp::R_MIPS_JUMP_SLOT: | |
11259 | // These are relocations which should only be seen by the | |
11260 | // dynamic linker, and should never be seen here. | |
11261 | gold_error(_("%s: unexpected reloc %u in object file"), | |
11262 | object->name().c_str(), r_type); | |
11263 | break; | |
11264 | ||
11265 | default: | |
11266 | break; | |
11267 | } | |
11268 | ||
11269 | // Refuse some position-dependent relocations when creating a | |
11270 | // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're | |
11271 | // not PIC, but we can create dynamic relocations and the result | |
11272 | // will be fine. Also do not refuse R_MIPS_LO16, which can be | |
11273 | // combined with R_MIPS_GOT16. | |
11274 | if (parameters->options().shared()) | |
11275 | { | |
11276 | switch (r_type) | |
11277 | { | |
11278 | case elfcpp::R_MIPS16_HI16: | |
11279 | case elfcpp::R_MIPS_HI16: | |
e242ece1 VR |
11280 | case elfcpp::R_MIPS_HIGHER: |
11281 | case elfcpp::R_MIPS_HIGHEST: | |
9810d34d | 11282 | case elfcpp::R_MICROMIPS_HI16: |
e242ece1 VR |
11283 | case elfcpp::R_MICROMIPS_HIGHER: |
11284 | case elfcpp::R_MICROMIPS_HIGHEST: | |
9810d34d SS |
11285 | // Don't refuse a high part relocation if it's against |
11286 | // no symbol (e.g. part of a compound relocation). | |
11287 | if (r_sym == 0) | |
11288 | break; | |
11289 | ||
11290 | // R_MIPS_HI16 against _gp_disp is used for $gp setup, | |
11291 | // and has a special meaning. | |
11292 | if (!mips_obj->is_newabi() && strcmp(gsym->name(), "_gp_disp") == 0) | |
11293 | break; | |
d8e90251 | 11294 | // Fall through. |
9810d34d SS |
11295 | |
11296 | case elfcpp::R_MIPS16_26: | |
11297 | case elfcpp::R_MIPS_26: | |
11298 | case elfcpp::R_MICROMIPS_26_S1: | |
11299 | gold_error(_("%s: relocation %u against `%s' can not be used when " | |
11300 | "making a shared object; recompile with -fPIC"), | |
11301 | object->name().c_str(), r_type, gsym->name()); | |
11302 | default: | |
11303 | break; | |
11304 | } | |
11305 | } | |
11306 | } | |
11307 | ||
11308 | template<int size, bool big_endian> | |
11309 | inline void | |
11310 | Target_mips<size, big_endian>::Scan::global( | |
11311 | Symbol_table* symtab, | |
11312 | Layout* layout, | |
11313 | Target_mips<size, big_endian>* target, | |
11314 | Sized_relobj_file<size, big_endian>* object, | |
11315 | unsigned int data_shndx, | |
11316 | Output_section* output_section, | |
4d625b70 | 11317 | const Relatype& reloc, |
9810d34d SS |
11318 | unsigned int r_type, |
11319 | Symbol* gsym) | |
11320 | { | |
11321 | global( | |
11322 | symtab, | |
11323 | layout, | |
11324 | target, | |
11325 | object, | |
11326 | data_shndx, | |
11327 | output_section, | |
11328 | &reloc, | |
4d625b70 | 11329 | (const Reltype*) NULL, |
9810d34d SS |
11330 | elfcpp::SHT_RELA, |
11331 | r_type, | |
11332 | gsym); | |
11333 | } | |
11334 | ||
11335 | template<int size, bool big_endian> | |
11336 | inline void | |
11337 | Target_mips<size, big_endian>::Scan::global( | |
11338 | Symbol_table* symtab, | |
11339 | Layout* layout, | |
11340 | Target_mips<size, big_endian>* target, | |
11341 | Sized_relobj_file<size, big_endian>* object, | |
11342 | unsigned int data_shndx, | |
11343 | Output_section* output_section, | |
4d625b70 | 11344 | const Reltype& reloc, |
9810d34d SS |
11345 | unsigned int r_type, |
11346 | Symbol* gsym) | |
11347 | { | |
11348 | global( | |
11349 | symtab, | |
11350 | layout, | |
11351 | target, | |
11352 | object, | |
11353 | data_shndx, | |
11354 | output_section, | |
4d625b70 | 11355 | (const Relatype*) NULL, |
9810d34d SS |
11356 | &reloc, |
11357 | elfcpp::SHT_REL, | |
11358 | r_type, | |
11359 | gsym); | |
11360 | } | |
11361 | ||
47a9f4fc VR |
11362 | // Return whether a R_MIPS_32/R_MIPS64 relocation needs to be applied. |
11363 | // In cases where Scan::local() or Scan::global() has created | |
11364 | // a dynamic relocation, the addend of the relocation is carried | |
11365 | // in the data, and we must not apply the static relocation. | |
9810d34d SS |
11366 | |
11367 | template<int size, bool big_endian> | |
11368 | inline bool | |
47a9f4fc | 11369 | Target_mips<size, big_endian>::Relocate::should_apply_static_reloc( |
9810d34d SS |
11370 | const Mips_symbol<size>* gsym, |
11371 | unsigned int r_type, | |
11372 | Output_section* output_section, | |
11373 | Target_mips* target) | |
11374 | { | |
11375 | // If the output section is not allocated, then we didn't call | |
11376 | // scan_relocs, we didn't create a dynamic reloc, and we must apply | |
11377 | // the reloc here. | |
11378 | if ((output_section->flags() & elfcpp::SHF_ALLOC) == 0) | |
11379 | return true; | |
11380 | ||
11381 | if (gsym == NULL) | |
11382 | return true; | |
11383 | else | |
11384 | { | |
11385 | // For global symbols, we use the same helper routines used in the | |
11386 | // scan pass. | |
11387 | if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)) | |
11388 | && !gsym->may_need_copy_reloc()) | |
11389 | { | |
11390 | // We have generated dynamic reloc (R_MIPS_REL32). | |
11391 | ||
11392 | bool multi_got = false; | |
11393 | if (target->has_got_section()) | |
11394 | multi_got = target->got_section()->multi_got(); | |
11395 | bool has_got_offset; | |
11396 | if (!multi_got) | |
11397 | has_got_offset = gsym->has_got_offset(GOT_TYPE_STANDARD); | |
11398 | else | |
11399 | has_got_offset = gsym->global_gotoffset() != -1U; | |
11400 | if (!has_got_offset) | |
11401 | return true; | |
11402 | else | |
11403 | // Apply the relocation only if the symbol is in the local got. | |
11404 | // Do not apply the relocation if the symbol is in the global | |
11405 | // got. | |
11406 | return symbol_references_local(gsym, gsym->has_dynsym_index()); | |
11407 | } | |
11408 | else | |
11409 | // We have not generated dynamic reloc. | |
11410 | return true; | |
11411 | } | |
11412 | } | |
11413 | ||
11414 | // Perform a relocation. | |
11415 | ||
11416 | template<int size, bool big_endian> | |
11417 | inline bool | |
11418 | Target_mips<size, big_endian>::Relocate::relocate( | |
11419 | const Relocate_info<size, big_endian>* relinfo, | |
91a65d2f | 11420 | unsigned int rel_type, |
9810d34d SS |
11421 | Target_mips* target, |
11422 | Output_section* output_section, | |
11423 | size_t relnum, | |
91a65d2f | 11424 | const unsigned char* preloc, |
9810d34d SS |
11425 | const Sized_symbol<size>* gsym, |
11426 | const Symbol_value<size>* psymval, | |
11427 | unsigned char* view, | |
11428 | Mips_address address, | |
11429 | section_size_type) | |
11430 | { | |
11431 | Mips_address r_offset; | |
4d625b70 CC |
11432 | unsigned int r_sym; |
11433 | unsigned int r_type; | |
47a9f4fc VR |
11434 | unsigned int r_type2; |
11435 | unsigned int r_type3; | |
11436 | unsigned char r_ssym; | |
9810d34d | 11437 | typename elfcpp::Elf_types<size>::Elf_Swxword r_addend; |
152c92b2 VR |
11438 | // r_offset and r_type of the next relocation is needed for resolving multiple |
11439 | // consecutive relocations with the same offset. | |
11440 | Mips_address next_r_offset = static_cast<Mips_address>(0) - 1; | |
11441 | unsigned int next_r_type = elfcpp::R_MIPS_NONE; | |
11442 | ||
11443 | elfcpp::Shdr<size, big_endian> shdr(relinfo->reloc_shdr); | |
11444 | size_t reloc_count = shdr.get_sh_size() / shdr.get_sh_entsize(); | |
9810d34d SS |
11445 | |
11446 | if (rel_type == elfcpp::SHT_RELA) | |
11447 | { | |
4d625b70 | 11448 | const Relatype rela(preloc); |
91a65d2f | 11449 | r_offset = rela.get_r_offset(); |
4d625b70 CC |
11450 | r_sym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: |
11451 | get_r_sym(&rela); | |
11452 | r_type = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: | |
11453 | get_r_type(&rela); | |
47a9f4fc VR |
11454 | r_type2 = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: |
11455 | get_r_type2(&rela); | |
11456 | r_type3 = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: | |
11457 | get_r_type3(&rela); | |
11458 | r_ssym = Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: | |
11459 | get_r_ssym(&rela); | |
91a65d2f | 11460 | r_addend = rela.get_r_addend(); |
152c92b2 VR |
11461 | // If this is not last relocation, get r_offset and r_type of the next |
11462 | // relocation. | |
11463 | if (relnum + 1 < reloc_count) | |
11464 | { | |
11465 | const int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
11466 | const Relatype next_rela(preloc + reloc_size); | |
11467 | next_r_offset = next_rela.get_r_offset(); | |
11468 | next_r_type = | |
11469 | Mips_classify_reloc<elfcpp::SHT_RELA, size, big_endian>:: | |
11470 | get_r_type(&next_rela); | |
11471 | } | |
9810d34d SS |
11472 | } |
11473 | else | |
11474 | { | |
4d625b70 | 11475 | const Reltype rel(preloc); |
91a65d2f | 11476 | r_offset = rel.get_r_offset(); |
4d625b70 CC |
11477 | r_sym = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: |
11478 | get_r_sym(&rel); | |
11479 | r_type = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: | |
11480 | get_r_type(&rel); | |
47a9f4fc | 11481 | r_ssym = 0; |
152c92b2 VR |
11482 | r_type2 = elfcpp::R_MIPS_NONE; |
11483 | r_type3 = elfcpp::R_MIPS_NONE; | |
9810d34d | 11484 | r_addend = 0; |
152c92b2 VR |
11485 | // If this is not last relocation, get r_offset and r_type of the next |
11486 | // relocation. | |
11487 | if (relnum + 1 < reloc_count) | |
11488 | { | |
11489 | const int reloc_size = elfcpp::Elf_sizes<size>::rel_size; | |
11490 | const Reltype next_rel(preloc + reloc_size); | |
11491 | next_r_offset = next_rel.get_r_offset(); | |
11492 | next_r_type = Mips_classify_reloc<elfcpp::SHT_REL, size, big_endian>:: | |
11493 | get_r_type(&next_rel); | |
11494 | } | |
9810d34d SS |
11495 | } |
11496 | ||
11497 | typedef Mips_relocate_functions<size, big_endian> Reloc_funcs; | |
11498 | typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY; | |
11499 | ||
11500 | Mips_relobj<size, big_endian>* object = | |
4d625b70 | 11501 | Mips_relobj<size, big_endian>::as_mips_relobj(relinfo->object); |
9810d34d | 11502 | |
9810d34d SS |
11503 | bool target_is_16_bit_code = false; |
11504 | bool target_is_micromips_code = false; | |
11505 | bool cross_mode_jump; | |
11506 | ||
11507 | Symbol_value<size> symval; | |
11508 | ||
11509 | const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym); | |
11510 | ||
11511 | bool changed_symbol_value = false; | |
11512 | if (gsym == NULL) | |
11513 | { | |
11514 | target_is_16_bit_code = object->local_symbol_is_mips16(r_sym); | |
11515 | target_is_micromips_code = object->local_symbol_is_micromips(r_sym); | |
11516 | if (target_is_16_bit_code || target_is_micromips_code) | |
11517 | { | |
11518 | // MIPS16/microMIPS text labels should be treated as odd. | |
11519 | symval.set_output_value(psymval->value(object, 1)); | |
11520 | psymval = &symval; | |
11521 | changed_symbol_value = true; | |
11522 | } | |
11523 | } | |
11524 | else | |
11525 | { | |
11526 | target_is_16_bit_code = mips_sym->is_mips16(); | |
11527 | target_is_micromips_code = mips_sym->is_micromips(); | |
11528 | ||
11529 | // If this is a mips16/microMIPS text symbol, add 1 to the value to make | |
11530 | // it odd. This will cause something like .word SYM to come up with | |
11531 | // the right value when it is loaded into the PC. | |
11532 | ||
11533 | if ((mips_sym->is_mips16() || mips_sym->is_micromips()) | |
11534 | && psymval->value(object, 0) != 0) | |
11535 | { | |
11536 | symval.set_output_value(psymval->value(object, 0) | 1); | |
11537 | psymval = &symval; | |
11538 | changed_symbol_value = true; | |
11539 | } | |
11540 | ||
11541 | // Pick the value to use for symbols defined in shared objects. | |
11542 | if (mips_sym->use_plt_offset(Scan::get_reference_flags(r_type)) | |
11543 | || mips_sym->has_lazy_stub()) | |
11544 | { | |
11545 | Mips_address value; | |
11546 | if (!mips_sym->has_lazy_stub()) | |
11547 | { | |
11548 | // Prefer a standard MIPS PLT entry. | |
11549 | if (mips_sym->has_mips_plt_offset()) | |
11550 | { | |
11551 | value = target->plt_section()->mips_entry_address(mips_sym); | |
11552 | target_is_micromips_code = false; | |
11553 | target_is_16_bit_code = false; | |
11554 | } | |
11555 | else | |
11556 | { | |
11557 | value = (target->plt_section()->comp_entry_address(mips_sym) | |
11558 | + 1); | |
11559 | if (target->is_output_micromips()) | |
11560 | target_is_micromips_code = true; | |
11561 | else | |
11562 | target_is_16_bit_code = true; | |
11563 | } | |
11564 | } | |
11565 | else | |
11566 | value = target->mips_stubs_section()->stub_address(mips_sym); | |
11567 | ||
11568 | symval.set_output_value(value); | |
11569 | psymval = &symval; | |
11570 | } | |
11571 | } | |
11572 | ||
11573 | // TRUE if the symbol referred to by this relocation is "_gp_disp". | |
11574 | // Note that such a symbol must always be a global symbol. | |
11575 | bool gp_disp = (gsym != NULL && (strcmp(gsym->name(), "_gp_disp") == 0) | |
11576 | && !object->is_newabi()); | |
11577 | ||
11578 | // TRUE if the symbol referred to by this relocation is "__gnu_local_gp". | |
11579 | // Note that such a symbol must always be a global symbol. | |
11580 | bool gnu_local_gp = gsym && (strcmp(gsym->name(), "__gnu_local_gp") == 0); | |
11581 | ||
11582 | ||
11583 | if (gp_disp) | |
11584 | { | |
11585 | if (!hi16_reloc(r_type) && !lo16_reloc(r_type)) | |
11586 | gold_error_at_location(relinfo, relnum, r_offset, | |
11587 | _("relocations against _gp_disp are permitted only" | |
11588 | " with R_MIPS_HI16 and R_MIPS_LO16 relocations.")); | |
11589 | } | |
11590 | else if (gnu_local_gp) | |
11591 | { | |
11592 | // __gnu_local_gp is _gp symbol. | |
11593 | symval.set_output_value(target->adjusted_gp_value(object)); | |
11594 | psymval = &symval; | |
11595 | } | |
11596 | ||
11597 | // If this is a reference to a 16-bit function with a stub, we need | |
11598 | // to redirect the relocation to the stub unless: | |
11599 | // | |
11600 | // (a) the relocation is for a MIPS16 JAL; | |
11601 | // | |
11602 | // (b) the relocation is for a MIPS16 PIC call, and there are no | |
11603 | // non-MIPS16 uses of the GOT slot; or | |
11604 | // | |
11605 | // (c) the section allows direct references to MIPS16 functions. | |
11606 | if (r_type != elfcpp::R_MIPS16_26 | |
9810d34d SS |
11607 | && ((mips_sym != NULL |
11608 | && mips_sym->has_mips16_fn_stub() | |
11609 | && (r_type != elfcpp::R_MIPS16_CALL16 || mips_sym->need_fn_stub())) | |
11610 | || (mips_sym == NULL | |
11611 | && object->get_local_mips16_fn_stub(r_sym) != NULL)) | |
11612 | && !object->section_allows_mips16_refs(relinfo->data_shndx)) | |
11613 | { | |
11614 | // This is a 32- or 64-bit call to a 16-bit function. We should | |
11615 | // have already noticed that we were going to need the | |
11616 | // stub. | |
11617 | Mips_address value; | |
11618 | if (mips_sym == NULL) | |
11619 | value = object->get_local_mips16_fn_stub(r_sym)->output_address(); | |
11620 | else | |
11621 | { | |
11622 | gold_assert(mips_sym->need_fn_stub()); | |
11623 | if (mips_sym->has_la25_stub()) | |
11624 | value = target->la25_stub_section()->stub_address(mips_sym); | |
11625 | else | |
11626 | { | |
11627 | value = mips_sym->template | |
11628 | get_mips16_fn_stub<big_endian>()->output_address(); | |
11629 | } | |
11630 | } | |
11631 | symval.set_output_value(value); | |
11632 | psymval = &symval; | |
11633 | changed_symbol_value = true; | |
11634 | ||
11635 | // The target is 16-bit, but the stub isn't. | |
11636 | target_is_16_bit_code = false; | |
11637 | } | |
11638 | // If this is a MIPS16 call with a stub, that is made through the PLT or | |
11639 | // to a standard MIPS function, we need to redirect the call to the stub. | |
11640 | // Note that we specifically exclude R_MIPS16_CALL16 from this behavior; | |
11641 | // indirect calls should use an indirect stub instead. | |
1e1247c8 | 11642 | else if (r_type == elfcpp::R_MIPS16_26 |
9810d34d SS |
11643 | && ((mips_sym != NULL |
11644 | && (mips_sym->has_mips16_call_stub() | |
11645 | || mips_sym->has_mips16_call_fp_stub())) | |
11646 | || (mips_sym == NULL | |
11647 | && object->get_local_mips16_call_stub(r_sym) != NULL)) | |
11648 | && ((mips_sym != NULL && mips_sym->has_plt_offset()) | |
11649 | || !target_is_16_bit_code)) | |
11650 | { | |
11651 | Mips16_stub_section<size, big_endian>* call_stub; | |
11652 | if (mips_sym == NULL) | |
11653 | call_stub = object->get_local_mips16_call_stub(r_sym); | |
11654 | else | |
11655 | { | |
11656 | // If both call_stub and call_fp_stub are defined, we can figure | |
11657 | // out which one to use by checking which one appears in the input | |
11658 | // file. | |
11659 | if (mips_sym->has_mips16_call_stub() | |
11660 | && mips_sym->has_mips16_call_fp_stub()) | |
11661 | { | |
11662 | call_stub = NULL; | |
11663 | for (unsigned int i = 1; i < object->shnum(); ++i) | |
11664 | { | |
11665 | if (object->is_mips16_call_fp_stub_section(i)) | |
11666 | { | |
11667 | call_stub = mips_sym->template | |
11668 | get_mips16_call_fp_stub<big_endian>(); | |
11669 | break; | |
11670 | } | |
11671 | ||
11672 | } | |
11673 | if (call_stub == NULL) | |
11674 | call_stub = | |
11675 | mips_sym->template get_mips16_call_stub<big_endian>(); | |
11676 | } | |
11677 | else if (mips_sym->has_mips16_call_stub()) | |
11678 | call_stub = mips_sym->template get_mips16_call_stub<big_endian>(); | |
11679 | else | |
11680 | call_stub = mips_sym->template get_mips16_call_fp_stub<big_endian>(); | |
11681 | } | |
11682 | ||
11683 | symval.set_output_value(call_stub->output_address()); | |
11684 | psymval = &symval; | |
11685 | changed_symbol_value = true; | |
11686 | } | |
11687 | // If this is a direct call to a PIC function, redirect to the | |
11688 | // non-PIC stub. | |
11689 | else if (mips_sym != NULL | |
11690 | && mips_sym->has_la25_stub() | |
11691 | && relocation_needs_la25_stub<size, big_endian>( | |
11692 | object, r_type, target_is_16_bit_code)) | |
11693 | { | |
11694 | Mips_address value = target->la25_stub_section()->stub_address(mips_sym); | |
11695 | if (mips_sym->is_micromips()) | |
11696 | value += 1; | |
11697 | symval.set_output_value(value); | |
11698 | psymval = &symval; | |
11699 | } | |
11700 | // For direct MIPS16 and microMIPS calls make sure the compressed PLT | |
11701 | // entry is used if a standard PLT entry has also been made. | |
11702 | else if ((r_type == elfcpp::R_MIPS16_26 | |
11703 | || r_type == elfcpp::R_MICROMIPS_26_S1) | |
9810d34d SS |
11704 | && mips_sym != NULL |
11705 | && mips_sym->has_plt_offset() | |
11706 | && mips_sym->has_comp_plt_offset() | |
11707 | && mips_sym->has_mips_plt_offset()) | |
11708 | { | |
11709 | Mips_address value = (target->plt_section()->comp_entry_address(mips_sym) | |
11710 | + 1); | |
11711 | symval.set_output_value(value); | |
11712 | psymval = &symval; | |
11713 | ||
11714 | target_is_16_bit_code = !target->is_output_micromips(); | |
11715 | target_is_micromips_code = target->is_output_micromips(); | |
11716 | } | |
11717 | ||
11718 | // Make sure MIPS16 and microMIPS are not used together. | |
11719 | if ((r_type == elfcpp::R_MIPS16_26 && target_is_micromips_code) | |
11720 | || (micromips_branch_reloc(r_type) && target_is_16_bit_code)) | |
11721 | { | |
11722 | gold_error(_("MIPS16 and microMIPS functions cannot call each other")); | |
11723 | } | |
11724 | ||
11725 | // Calls from 16-bit code to 32-bit code and vice versa require the | |
11726 | // mode change. However, we can ignore calls to undefined weak symbols, | |
11727 | // which should never be executed at runtime. This exception is important | |
11728 | // because the assembly writer may have "known" that any definition of the | |
11729 | // symbol would be 16-bit code, and that direct jumps were therefore | |
11730 | // acceptable. | |
11731 | cross_mode_jump = | |
1e1247c8 | 11732 | (!(gsym != NULL && gsym->is_weak_undefined()) |
9810d34d SS |
11733 | && ((r_type == elfcpp::R_MIPS16_26 && !target_is_16_bit_code) |
11734 | || (r_type == elfcpp::R_MICROMIPS_26_S1 && !target_is_micromips_code) | |
11735 | || ((r_type == elfcpp::R_MIPS_26 || r_type == elfcpp::R_MIPS_JALR) | |
11736 | && (target_is_16_bit_code || target_is_micromips_code)))); | |
11737 | ||
11738 | bool local = (mips_sym == NULL | |
11739 | || (mips_sym->got_only_for_calls() | |
11740 | ? symbol_calls_local(mips_sym, mips_sym->has_dynsym_index()) | |
11741 | : symbol_references_local(mips_sym, | |
11742 | mips_sym->has_dynsym_index()))); | |
11743 | ||
11744 | // Global R_MIPS_GOT_PAGE/R_MICROMIPS_GOT_PAGE relocations are equivalent | |
11745 | // to R_MIPS_GOT_DISP/R_MICROMIPS_GOT_DISP. The addend is applied by the | |
11746 | // corresponding R_MIPS_GOT_OFST/R_MICROMIPS_GOT_OFST. | |
11747 | if (got_page_reloc(r_type) && !local) | |
11748 | r_type = (micromips_reloc(r_type) ? elfcpp::R_MICROMIPS_GOT_DISP | |
11749 | : elfcpp::R_MIPS_GOT_DISP); | |
11750 | ||
11751 | unsigned int got_offset = 0; | |
11752 | int gp_offset = 0; | |
11753 | ||
152c92b2 | 11754 | // Whether we have to extract addend from instruction. |
9810d34d | 11755 | bool extract_addend = rel_type == elfcpp::SHT_REL; |
47a9f4fc VR |
11756 | unsigned int r_types[3] = { r_type, r_type2, r_type3 }; |
11757 | ||
11758 | Reloc_funcs::mips_reloc_unshuffle(view, r_type, false); | |
11759 | ||
11760 | // For Mips64 N64 ABI, there may be up to three operations specified per | |
11761 | // record, by the fields r_type, r_type2, and r_type3. The first operation | |
11762 | // takes its addend from the relocation record. Each subsequent operation | |
11763 | // takes as its addend the result of the previous operation. | |
11764 | // The first operation in a record which references a symbol uses the symbol | |
11765 | // implied by r_sym. The next operation in a record which references a symbol | |
11766 | // uses the special symbol value given by the r_ssym field. A third operation | |
11767 | // in a record which references a symbol will assume a NULL symbol, | |
11768 | // i.e. value zero. | |
11769 | ||
11770 | // TODO(Vladimir) | |
11771 | // Check if a record references to a symbol. | |
11772 | for (unsigned int i = 0; i < 3; ++i) | |
9810d34d | 11773 | { |
47a9f4fc VR |
11774 | if (r_types[i] == elfcpp::R_MIPS_NONE) |
11775 | break; | |
9810d34d | 11776 | |
152c92b2 VR |
11777 | // If we didn't apply previous relocation, use its result as addend |
11778 | // for current. | |
11779 | if (this->calculate_only_) | |
11780 | { | |
11781 | r_addend = this->calculated_value_; | |
11782 | extract_addend = false; | |
11783 | } | |
11784 | ||
11785 | // In the N32 and 64-bit ABIs there may be multiple consecutive | |
11786 | // relocations for the same offset. In that case we are | |
11787 | // supposed to treat the output of each relocation as the addend | |
11788 | // for the next. For N64 ABI, we are checking offsets only in a | |
11789 | // third operation in a record (r_type3). | |
11790 | this->calculate_only_ = | |
11791 | (object->is_n64() && i < 2 | |
11792 | ? r_types[i+1] != elfcpp::R_MIPS_NONE | |
11793 | : (r_offset == next_r_offset) && (next_r_type != elfcpp::R_MIPS_NONE)); | |
47a9f4fc VR |
11794 | |
11795 | if (object->is_n64()) | |
9810d34d | 11796 | { |
47a9f4fc | 11797 | if (i == 1) |
9810d34d | 11798 | { |
47a9f4fc VR |
11799 | // Handle special symbol for r_type2 relocation type. |
11800 | switch (r_ssym) | |
11801 | { | |
11802 | case RSS_UNDEF: | |
11803 | symval.set_output_value(0); | |
11804 | break; | |
11805 | case RSS_GP: | |
11806 | symval.set_output_value(target->gp_value()); | |
11807 | break; | |
11808 | case RSS_GP0: | |
11809 | symval.set_output_value(object->gp_value()); | |
11810 | break; | |
11811 | case RSS_LOC: | |
11812 | symval.set_output_value(address); | |
11813 | break; | |
11814 | default: | |
11815 | gold_unreachable(); | |
11816 | } | |
9810d34d SS |
11817 | psymval = &symval; |
11818 | } | |
47a9f4fc VR |
11819 | else if (i == 2) |
11820 | { | |
11821 | // For r_type3 symbol value is 0. | |
11822 | symval.set_output_value(0); | |
11823 | } | |
9810d34d | 11824 | } |
9810d34d | 11825 | |
47a9f4fc VR |
11826 | bool update_got_entry = false; |
11827 | switch (r_types[i]) | |
11828 | { | |
11829 | case elfcpp::R_MIPS_NONE: | |
11830 | break; | |
11831 | case elfcpp::R_MIPS_16: | |
11832 | reloc_status = Reloc_funcs::rel16(view, object, psymval, r_addend, | |
152c92b2 VR |
11833 | extract_addend, |
11834 | this->calculate_only_, | |
11835 | &this->calculated_value_); | |
47a9f4fc | 11836 | break; |
9810d34d | 11837 | |
47a9f4fc VR |
11838 | case elfcpp::R_MIPS_32: |
11839 | if (should_apply_static_reloc(mips_sym, r_types[i], output_section, | |
11840 | target)) | |
11841 | reloc_status = Reloc_funcs::rel32(view, object, psymval, r_addend, | |
152c92b2 VR |
11842 | extract_addend, |
11843 | this->calculate_only_, | |
11844 | &this->calculated_value_); | |
47a9f4fc VR |
11845 | if (mips_sym != NULL |
11846 | && (mips_sym->is_mips16() || mips_sym->is_micromips()) | |
11847 | && mips_sym->global_got_area() == GGA_RELOC_ONLY) | |
11848 | { | |
11849 | // If mips_sym->has_mips16_fn_stub() is false, symbol value is | |
11850 | // already updated by adding +1. | |
11851 | if (mips_sym->has_mips16_fn_stub()) | |
11852 | { | |
11853 | gold_assert(mips_sym->need_fn_stub()); | |
11854 | Mips16_stub_section<size, big_endian>* fn_stub = | |
11855 | mips_sym->template get_mips16_fn_stub<big_endian>(); | |
9810d34d | 11856 | |
47a9f4fc VR |
11857 | symval.set_output_value(fn_stub->output_address()); |
11858 | psymval = &symval; | |
11859 | } | |
11860 | got_offset = mips_sym->global_gotoffset(); | |
11861 | update_got_entry = true; | |
11862 | } | |
11863 | break; | |
9810d34d | 11864 | |
47a9f4fc VR |
11865 | case elfcpp::R_MIPS_64: |
11866 | if (should_apply_static_reloc(mips_sym, r_types[i], output_section, | |
11867 | target)) | |
11868 | reloc_status = Reloc_funcs::rel64(view, object, psymval, r_addend, | |
152c92b2 VR |
11869 | extract_addend, |
11870 | this->calculate_only_, | |
11871 | &this->calculated_value_, false); | |
47a9f4fc VR |
11872 | else if (target->is_output_n64() && r_addend != 0) |
11873 | // Only apply the addend. The static relocation was RELA, but the | |
11874 | // dynamic relocation is REL, so we need to apply the addend. | |
11875 | reloc_status = Reloc_funcs::rel64(view, object, psymval, r_addend, | |
152c92b2 VR |
11876 | extract_addend, |
11877 | this->calculate_only_, | |
11878 | &this->calculated_value_, true); | |
47a9f4fc VR |
11879 | break; |
11880 | case elfcpp::R_MIPS_REL32: | |
11881 | gold_unreachable(); | |
9810d34d | 11882 | |
47a9f4fc VR |
11883 | case elfcpp::R_MIPS_PC32: |
11884 | reloc_status = Reloc_funcs::relpc32(view, object, psymval, address, | |
11885 | r_addend, extract_addend, | |
152c92b2 VR |
11886 | this->calculate_only_, |
11887 | &this->calculated_value_); | |
47a9f4fc | 11888 | break; |
9810d34d | 11889 | |
47a9f4fc VR |
11890 | case elfcpp::R_MIPS16_26: |
11891 | // The calculation for R_MIPS16_26 is just the same as for an | |
11892 | // R_MIPS_26. It's only the storage of the relocated field into | |
11893 | // the output file that's different. So, we just fall through to the | |
11894 | // R_MIPS_26 case here. | |
11895 | case elfcpp::R_MIPS_26: | |
11896 | case elfcpp::R_MICROMIPS_26_S1: | |
11897 | reloc_status = Reloc_funcs::rel26(view, object, psymval, address, | |
11898 | gsym == NULL, r_addend, extract_addend, gsym, cross_mode_jump, | |
152c92b2 VR |
11899 | r_types[i], target->jal_to_bal(), this->calculate_only_, |
11900 | &this->calculated_value_); | |
47a9f4fc | 11901 | break; |
9810d34d | 11902 | |
47a9f4fc VR |
11903 | case elfcpp::R_MIPS_HI16: |
11904 | case elfcpp::R_MIPS16_HI16: | |
11905 | case elfcpp::R_MICROMIPS_HI16: | |
11906 | if (rel_type == elfcpp::SHT_RELA) | |
11907 | reloc_status = Reloc_funcs::do_relhi16(view, object, psymval, | |
11908 | r_addend, address, | |
11909 | gp_disp, r_types[i], | |
11910 | extract_addend, 0, | |
152c92b2 VR |
11911 | target, |
11912 | this->calculate_only_, | |
11913 | &this->calculated_value_); | |
47a9f4fc VR |
11914 | else if (rel_type == elfcpp::SHT_REL) |
11915 | reloc_status = Reloc_funcs::relhi16(view, object, psymval, r_addend, | |
11916 | address, gp_disp, r_types[i], | |
11917 | r_sym, extract_addend); | |
11918 | else | |
11919 | gold_unreachable(); | |
11920 | break; | |
9810d34d | 11921 | |
47a9f4fc VR |
11922 | case elfcpp::R_MIPS_LO16: |
11923 | case elfcpp::R_MIPS16_LO16: | |
11924 | case elfcpp::R_MICROMIPS_LO16: | |
11925 | case elfcpp::R_MICROMIPS_HI0_LO16: | |
11926 | reloc_status = Reloc_funcs::rello16(target, view, object, psymval, | |
11927 | r_addend, extract_addend, address, | |
11928 | gp_disp, r_types[i], r_sym, | |
152c92b2 VR |
11929 | rel_type, this->calculate_only_, |
11930 | &this->calculated_value_); | |
47a9f4fc | 11931 | break; |
9810d34d | 11932 | |
47a9f4fc VR |
11933 | case elfcpp::R_MIPS_LITERAL: |
11934 | case elfcpp::R_MICROMIPS_LITERAL: | |
11935 | // Because we don't merge literal sections, we can handle this | |
11936 | // just like R_MIPS_GPREL16. In the long run, we should merge | |
11937 | // shared literals, and then we will need to additional work | |
11938 | // here. | |
9810d34d | 11939 | |
47a9f4fc | 11940 | // Fall through. |
9810d34d | 11941 | |
47a9f4fc VR |
11942 | case elfcpp::R_MIPS_GPREL16: |
11943 | case elfcpp::R_MIPS16_GPREL: | |
11944 | case elfcpp::R_MICROMIPS_GPREL7_S2: | |
11945 | case elfcpp::R_MICROMIPS_GPREL16: | |
11946 | reloc_status = Reloc_funcs::relgprel(view, object, psymval, | |
11947 | target->adjusted_gp_value(object), | |
11948 | r_addend, extract_addend, | |
11949 | gsym == NULL, r_types[i], | |
152c92b2 VR |
11950 | this->calculate_only_, |
11951 | &this->calculated_value_); | |
47a9f4fc | 11952 | break; |
9810d34d | 11953 | |
47a9f4fc VR |
11954 | case elfcpp::R_MIPS_PC16: |
11955 | reloc_status = Reloc_funcs::relpc16(view, object, psymval, address, | |
11956 | r_addend, extract_addend, | |
152c92b2 VR |
11957 | this->calculate_only_, |
11958 | &this->calculated_value_); | |
47a9f4fc | 11959 | break; |
f5b11759 VR |
11960 | |
11961 | case elfcpp::R_MIPS_PC21_S2: | |
11962 | reloc_status = Reloc_funcs::relpc21(view, object, psymval, address, | |
11963 | r_addend, extract_addend, | |
152c92b2 VR |
11964 | this->calculate_only_, |
11965 | &this->calculated_value_); | |
f5b11759 VR |
11966 | break; |
11967 | ||
11968 | case elfcpp::R_MIPS_PC26_S2: | |
11969 | reloc_status = Reloc_funcs::relpc26(view, object, psymval, address, | |
11970 | r_addend, extract_addend, | |
152c92b2 VR |
11971 | this->calculate_only_, |
11972 | &this->calculated_value_); | |
f5b11759 VR |
11973 | break; |
11974 | ||
11975 | case elfcpp::R_MIPS_PC18_S3: | |
11976 | reloc_status = Reloc_funcs::relpc18(view, object, psymval, address, | |
11977 | r_addend, extract_addend, | |
152c92b2 VR |
11978 | this->calculate_only_, |
11979 | &this->calculated_value_); | |
f5b11759 VR |
11980 | break; |
11981 | ||
11982 | case elfcpp::R_MIPS_PC19_S2: | |
11983 | reloc_status = Reloc_funcs::relpc19(view, object, psymval, address, | |
11984 | r_addend, extract_addend, | |
152c92b2 VR |
11985 | this->calculate_only_, |
11986 | &this->calculated_value_); | |
f5b11759 VR |
11987 | break; |
11988 | ||
11989 | case elfcpp::R_MIPS_PCHI16: | |
11990 | if (rel_type == elfcpp::SHT_RELA) | |
11991 | reloc_status = Reloc_funcs::do_relpchi16(view, object, psymval, | |
11992 | r_addend, address, | |
11993 | extract_addend, 0, | |
152c92b2 VR |
11994 | this->calculate_only_, |
11995 | &this->calculated_value_); | |
f5b11759 VR |
11996 | else if (rel_type == elfcpp::SHT_REL) |
11997 | reloc_status = Reloc_funcs::relpchi16(view, object, psymval, | |
11998 | r_addend, address, r_sym, | |
11999 | extract_addend); | |
12000 | else | |
12001 | gold_unreachable(); | |
12002 | break; | |
12003 | ||
12004 | case elfcpp::R_MIPS_PCLO16: | |
12005 | reloc_status = Reloc_funcs::relpclo16(view, object, psymval, r_addend, | |
12006 | extract_addend, address, r_sym, | |
152c92b2 VR |
12007 | rel_type, this->calculate_only_, |
12008 | &this->calculated_value_); | |
f5b11759 | 12009 | break; |
47a9f4fc VR |
12010 | case elfcpp::R_MICROMIPS_PC7_S1: |
12011 | reloc_status = Reloc_funcs::relmicromips_pc7_s1(view, object, psymval, | |
152c92b2 VR |
12012 | address, r_addend, |
12013 | extract_addend, | |
12014 | this->calculate_only_, | |
12015 | &this->calculated_value_); | |
47a9f4fc VR |
12016 | break; |
12017 | case elfcpp::R_MICROMIPS_PC10_S1: | |
12018 | reloc_status = Reloc_funcs::relmicromips_pc10_s1(view, object, | |
152c92b2 VR |
12019 | psymval, address, |
12020 | r_addend, extract_addend, | |
12021 | this->calculate_only_, | |
12022 | &this->calculated_value_); | |
47a9f4fc VR |
12023 | break; |
12024 | case elfcpp::R_MICROMIPS_PC16_S1: | |
12025 | reloc_status = Reloc_funcs::relmicromips_pc16_s1(view, object, | |
152c92b2 VR |
12026 | psymval, address, |
12027 | r_addend, extract_addend, | |
12028 | this->calculate_only_, | |
12029 | &this->calculated_value_); | |
47a9f4fc VR |
12030 | break; |
12031 | case elfcpp::R_MIPS_GPREL32: | |
12032 | reloc_status = Reloc_funcs::relgprel32(view, object, psymval, | |
12033 | target->adjusted_gp_value(object), | |
12034 | r_addend, extract_addend, | |
152c92b2 VR |
12035 | this->calculate_only_, |
12036 | &this->calculated_value_); | |
47a9f4fc VR |
12037 | break; |
12038 | case elfcpp::R_MIPS_GOT_HI16: | |
12039 | case elfcpp::R_MIPS_CALL_HI16: | |
12040 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
12041 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
12042 | if (gsym != NULL) | |
12043 | got_offset = target->got_section()->got_offset(gsym, | |
12044 | GOT_TYPE_STANDARD, | |
12045 | object); | |
12046 | else | |
12047 | got_offset = target->got_section()->got_offset(r_sym, | |
12048 | GOT_TYPE_STANDARD, | |
12049 | object, r_addend); | |
12050 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
12051 | reloc_status = Reloc_funcs::relgot_hi16(view, gp_offset, | |
152c92b2 VR |
12052 | this->calculate_only_, |
12053 | &this->calculated_value_); | |
47a9f4fc VR |
12054 | update_got_entry = changed_symbol_value; |
12055 | break; | |
9810d34d | 12056 | |
47a9f4fc VR |
12057 | case elfcpp::R_MIPS_GOT_LO16: |
12058 | case elfcpp::R_MIPS_CALL_LO16: | |
12059 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
12060 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
12061 | if (gsym != NULL) | |
12062 | got_offset = target->got_section()->got_offset(gsym, | |
12063 | GOT_TYPE_STANDARD, | |
12064 | object); | |
12065 | else | |
12066 | got_offset = target->got_section()->got_offset(r_sym, | |
12067 | GOT_TYPE_STANDARD, | |
12068 | object, r_addend); | |
12069 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
12070 | reloc_status = Reloc_funcs::relgot_lo16(view, gp_offset, | |
152c92b2 VR |
12071 | this->calculate_only_, |
12072 | &this->calculated_value_); | |
47a9f4fc VR |
12073 | update_got_entry = changed_symbol_value; |
12074 | break; | |
12075 | ||
12076 | case elfcpp::R_MIPS_GOT_DISP: | |
12077 | case elfcpp::R_MICROMIPS_GOT_DISP: | |
12078 | case elfcpp::R_MIPS_EH: | |
12079 | if (gsym != NULL) | |
12080 | got_offset = target->got_section()->got_offset(gsym, | |
12081 | GOT_TYPE_STANDARD, | |
12082 | object); | |
12083 | else | |
12084 | got_offset = target->got_section()->got_offset(r_sym, | |
12085 | GOT_TYPE_STANDARD, | |
12086 | object, r_addend); | |
12087 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
12088 | if (eh_reloc(r_types[i])) | |
12089 | reloc_status = Reloc_funcs::releh(view, gp_offset, | |
152c92b2 VR |
12090 | this->calculate_only_, |
12091 | &this->calculated_value_); | |
47a9f4fc VR |
12092 | else |
12093 | reloc_status = Reloc_funcs::relgot(view, gp_offset, | |
152c92b2 VR |
12094 | this->calculate_only_, |
12095 | &this->calculated_value_); | |
47a9f4fc VR |
12096 | break; |
12097 | case elfcpp::R_MIPS_CALL16: | |
12098 | case elfcpp::R_MIPS16_CALL16: | |
12099 | case elfcpp::R_MICROMIPS_CALL16: | |
12100 | gold_assert(gsym != NULL); | |
9810d34d SS |
12101 | got_offset = target->got_section()->got_offset(gsym, |
12102 | GOT_TYPE_STANDARD, | |
12103 | object); | |
12104 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
47a9f4fc | 12105 | reloc_status = Reloc_funcs::relgot(view, gp_offset, |
152c92b2 VR |
12106 | this->calculate_only_, |
12107 | &this->calculated_value_); | |
47a9f4fc VR |
12108 | // TODO(sasa): We should also initialize update_got_entry |
12109 | // in other place swhere relgot is called. | |
12110 | update_got_entry = changed_symbol_value; | |
12111 | break; | |
9810d34d | 12112 | |
47a9f4fc VR |
12113 | case elfcpp::R_MIPS_GOT16: |
12114 | case elfcpp::R_MIPS16_GOT16: | |
12115 | case elfcpp::R_MICROMIPS_GOT16: | |
12116 | if (gsym != NULL) | |
12117 | { | |
12118 | got_offset = target->got_section()->got_offset(gsym, | |
12119 | GOT_TYPE_STANDARD, | |
12120 | object); | |
12121 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
12122 | reloc_status = Reloc_funcs::relgot(view, gp_offset, | |
152c92b2 VR |
12123 | this->calculate_only_, |
12124 | &this->calculated_value_); | |
47a9f4fc VR |
12125 | } |
12126 | else | |
12127 | { | |
12128 | if (rel_type == elfcpp::SHT_RELA) | |
12129 | reloc_status = Reloc_funcs::do_relgot16_local(view, object, | |
152c92b2 VR |
12130 | psymval, r_addend, |
12131 | extract_addend, 0, | |
12132 | target, | |
12133 | this->calculate_only_, | |
12134 | &this->calculated_value_); | |
47a9f4fc VR |
12135 | else if (rel_type == elfcpp::SHT_REL) |
12136 | reloc_status = Reloc_funcs::relgot16_local(view, object, | |
12137 | psymval, r_addend, | |
12138 | extract_addend, | |
12139 | r_types[i], r_sym); | |
12140 | else | |
12141 | gold_unreachable(); | |
12142 | } | |
12143 | update_got_entry = changed_symbol_value; | |
12144 | break; | |
9810d34d | 12145 | |
47a9f4fc VR |
12146 | case elfcpp::R_MIPS_TLS_GD: |
12147 | case elfcpp::R_MIPS16_TLS_GD: | |
12148 | case elfcpp::R_MICROMIPS_TLS_GD: | |
12149 | if (gsym != NULL) | |
12150 | got_offset = target->got_section()->got_offset(gsym, | |
12151 | GOT_TYPE_TLS_PAIR, | |
12152 | object); | |
12153 | else | |
12154 | got_offset = target->got_section()->got_offset(r_sym, | |
12155 | GOT_TYPE_TLS_PAIR, | |
12156 | object, r_addend); | |
12157 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
152c92b2 VR |
12158 | reloc_status = Reloc_funcs::relgot(view, gp_offset, |
12159 | this->calculate_only_, | |
12160 | &this->calculated_value_); | |
47a9f4fc | 12161 | break; |
9810d34d | 12162 | |
47a9f4fc VR |
12163 | case elfcpp::R_MIPS_TLS_GOTTPREL: |
12164 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
12165 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
12166 | if (gsym != NULL) | |
12167 | got_offset = target->got_section()->got_offset(gsym, | |
12168 | GOT_TYPE_TLS_OFFSET, | |
12169 | object); | |
12170 | else | |
12171 | got_offset = target->got_section()->got_offset(r_sym, | |
12172 | GOT_TYPE_TLS_OFFSET, | |
12173 | object, r_addend); | |
12174 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
152c92b2 VR |
12175 | reloc_status = Reloc_funcs::relgot(view, gp_offset, |
12176 | this->calculate_only_, | |
12177 | &this->calculated_value_); | |
47a9f4fc | 12178 | break; |
9810d34d | 12179 | |
47a9f4fc VR |
12180 | case elfcpp::R_MIPS_TLS_LDM: |
12181 | case elfcpp::R_MIPS16_TLS_LDM: | |
12182 | case elfcpp::R_MICROMIPS_TLS_LDM: | |
12183 | // Relocate the field with the offset of the GOT entry for | |
12184 | // the module index. | |
12185 | got_offset = target->got_section()->tls_ldm_offset(object); | |
12186 | gp_offset = target->got_section()->gp_offset(got_offset, object); | |
152c92b2 VR |
12187 | reloc_status = Reloc_funcs::relgot(view, gp_offset, |
12188 | this->calculate_only_, | |
12189 | &this->calculated_value_); | |
47a9f4fc | 12190 | break; |
9810d34d | 12191 | |
47a9f4fc VR |
12192 | case elfcpp::R_MIPS_GOT_PAGE: |
12193 | case elfcpp::R_MICROMIPS_GOT_PAGE: | |
12194 | reloc_status = Reloc_funcs::relgotpage(target, view, object, psymval, | |
12195 | r_addend, extract_addend, | |
152c92b2 VR |
12196 | this->calculate_only_, |
12197 | &this->calculated_value_); | |
47a9f4fc | 12198 | break; |
9810d34d | 12199 | |
47a9f4fc VR |
12200 | case elfcpp::R_MIPS_GOT_OFST: |
12201 | case elfcpp::R_MICROMIPS_GOT_OFST: | |
12202 | reloc_status = Reloc_funcs::relgotofst(target, view, object, psymval, | |
12203 | r_addend, extract_addend, | |
152c92b2 VR |
12204 | local, this->calculate_only_, |
12205 | &this->calculated_value_); | |
47a9f4fc | 12206 | break; |
9810d34d | 12207 | |
47a9f4fc VR |
12208 | case elfcpp::R_MIPS_JALR: |
12209 | case elfcpp::R_MICROMIPS_JALR: | |
12210 | // This relocation is only a hint. In some cases, we optimize | |
12211 | // it into a bal instruction. But we don't try to optimize | |
12212 | // when the symbol does not resolve locally. | |
12213 | if (gsym == NULL | |
12214 | || symbol_calls_local(gsym, gsym->has_dynsym_index())) | |
12215 | reloc_status = Reloc_funcs::reljalr(view, object, psymval, address, | |
12216 | r_addend, extract_addend, | |
12217 | cross_mode_jump, r_types[i], | |
12218 | target->jalr_to_bal(), | |
12219 | target->jr_to_b(), | |
152c92b2 VR |
12220 | this->calculate_only_, |
12221 | &this->calculated_value_); | |
47a9f4fc | 12222 | break; |
9810d34d | 12223 | |
47a9f4fc VR |
12224 | case elfcpp::R_MIPS_TLS_DTPREL_HI16: |
12225 | case elfcpp::R_MIPS16_TLS_DTPREL_HI16: | |
12226 | case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16: | |
12227 | reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval, | |
12228 | elfcpp::DTP_OFFSET, r_addend, | |
152c92b2 VR |
12229 | extract_addend, |
12230 | this->calculate_only_, | |
12231 | &this->calculated_value_); | |
47a9f4fc VR |
12232 | break; |
12233 | case elfcpp::R_MIPS_TLS_DTPREL_LO16: | |
12234 | case elfcpp::R_MIPS16_TLS_DTPREL_LO16: | |
12235 | case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16: | |
12236 | reloc_status = Reloc_funcs::tlsrello16(view, object, psymval, | |
12237 | elfcpp::DTP_OFFSET, r_addend, | |
152c92b2 VR |
12238 | extract_addend, |
12239 | this->calculate_only_, | |
12240 | &this->calculated_value_); | |
47a9f4fc VR |
12241 | break; |
12242 | case elfcpp::R_MIPS_TLS_DTPREL32: | |
12243 | case elfcpp::R_MIPS_TLS_DTPREL64: | |
12244 | reloc_status = Reloc_funcs::tlsrel32(view, object, psymval, | |
12245 | elfcpp::DTP_OFFSET, r_addend, | |
152c92b2 VR |
12246 | extract_addend, |
12247 | this->calculate_only_, | |
12248 | &this->calculated_value_); | |
47a9f4fc VR |
12249 | break; |
12250 | case elfcpp::R_MIPS_TLS_TPREL_HI16: | |
12251 | case elfcpp::R_MIPS16_TLS_TPREL_HI16: | |
12252 | case elfcpp::R_MICROMIPS_TLS_TPREL_HI16: | |
12253 | reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval, | |
12254 | elfcpp::TP_OFFSET, r_addend, | |
152c92b2 VR |
12255 | extract_addend, |
12256 | this->calculate_only_, | |
12257 | &this->calculated_value_); | |
47a9f4fc VR |
12258 | break; |
12259 | case elfcpp::R_MIPS_TLS_TPREL_LO16: | |
12260 | case elfcpp::R_MIPS16_TLS_TPREL_LO16: | |
12261 | case elfcpp::R_MICROMIPS_TLS_TPREL_LO16: | |
12262 | reloc_status = Reloc_funcs::tlsrello16(view, object, psymval, | |
12263 | elfcpp::TP_OFFSET, r_addend, | |
152c92b2 VR |
12264 | extract_addend, |
12265 | this->calculate_only_, | |
12266 | &this->calculated_value_); | |
47a9f4fc VR |
12267 | break; |
12268 | case elfcpp::R_MIPS_TLS_TPREL32: | |
12269 | case elfcpp::R_MIPS_TLS_TPREL64: | |
12270 | reloc_status = Reloc_funcs::tlsrel32(view, object, psymval, | |
12271 | elfcpp::TP_OFFSET, r_addend, | |
152c92b2 VR |
12272 | extract_addend, |
12273 | this->calculate_only_, | |
12274 | &this->calculated_value_); | |
47a9f4fc VR |
12275 | break; |
12276 | case elfcpp::R_MIPS_SUB: | |
12277 | case elfcpp::R_MICROMIPS_SUB: | |
12278 | reloc_status = Reloc_funcs::relsub(view, object, psymval, r_addend, | |
12279 | extract_addend, | |
152c92b2 VR |
12280 | this->calculate_only_, |
12281 | &this->calculated_value_); | |
47a9f4fc | 12282 | break; |
e242ece1 VR |
12283 | case elfcpp::R_MIPS_HIGHER: |
12284 | case elfcpp::R_MICROMIPS_HIGHER: | |
12285 | reloc_status = Reloc_funcs::relhigher(view, object, psymval, r_addend, | |
152c92b2 VR |
12286 | extract_addend, |
12287 | this->calculate_only_, | |
12288 | &this->calculated_value_); | |
e242ece1 VR |
12289 | break; |
12290 | case elfcpp::R_MIPS_HIGHEST: | |
12291 | case elfcpp::R_MICROMIPS_HIGHEST: | |
12292 | reloc_status = Reloc_funcs::relhighest(view, object, psymval, | |
12293 | r_addend, extract_addend, | |
152c92b2 VR |
12294 | this->calculate_only_, |
12295 | &this->calculated_value_); | |
e242ece1 | 12296 | break; |
47a9f4fc VR |
12297 | default: |
12298 | gold_error_at_location(relinfo, relnum, r_offset, | |
12299 | _("unsupported reloc %u"), r_types[i]); | |
12300 | break; | |
12301 | } | |
12302 | ||
12303 | if (update_got_entry) | |
12304 | { | |
12305 | Mips_output_data_got<size, big_endian>* got = target->got_section(); | |
12306 | if (mips_sym != NULL && mips_sym->get_applied_secondary_got_fixup()) | |
12307 | got->update_got_entry(got->get_primary_got_offset(mips_sym), | |
12308 | psymval->value(object, 0)); | |
12309 | else | |
12310 | got->update_got_entry(got_offset, psymval->value(object, 0)); | |
12311 | } | |
9810d34d SS |
12312 | } |
12313 | ||
1e1247c8 | 12314 | bool jal_shuffle = jal_reloc(r_type); |
47a9f4fc VR |
12315 | Reloc_funcs::mips_reloc_shuffle(view, r_type, jal_shuffle); |
12316 | ||
9810d34d SS |
12317 | // Report any errors. |
12318 | switch (reloc_status) | |
12319 | { | |
12320 | case Reloc_funcs::STATUS_OKAY: | |
12321 | break; | |
12322 | case Reloc_funcs::STATUS_OVERFLOW: | |
c3847462 VR |
12323 | if (gsym == NULL) |
12324 | gold_error_at_location(relinfo, relnum, r_offset, | |
12325 | _("relocation overflow: " | |
12326 | "%u against local symbol %u in %s"), | |
12327 | r_type, r_sym, object->name().c_str()); | |
12328 | else if (gsym->is_defined() && gsym->source() == Symbol::FROM_OBJECT) | |
12329 | gold_error_at_location(relinfo, relnum, r_offset, | |
12330 | _("relocation overflow: " | |
12331 | "%u against '%s' defined in %s"), | |
12332 | r_type, gsym->demangled_name().c_str(), | |
12333 | gsym->object()->name().c_str()); | |
12334 | else | |
12335 | gold_error_at_location(relinfo, relnum, r_offset, | |
12336 | _("relocation overflow: %u against '%s'"), | |
12337 | r_type, gsym->demangled_name().c_str()); | |
9810d34d SS |
12338 | break; |
12339 | case Reloc_funcs::STATUS_BAD_RELOC: | |
12340 | gold_error_at_location(relinfo, relnum, r_offset, | |
12341 | _("unexpected opcode while processing relocation")); | |
12342 | break; | |
f5b11759 VR |
12343 | case Reloc_funcs::STATUS_PCREL_UNALIGNED: |
12344 | gold_error_at_location(relinfo, relnum, r_offset, | |
12345 | _("unaligned PC-relative relocation")); | |
12346 | break; | |
9810d34d SS |
12347 | default: |
12348 | gold_unreachable(); | |
12349 | } | |
12350 | ||
12351 | return true; | |
12352 | } | |
12353 | ||
9810d34d SS |
12354 | // Get the Reference_flags for a particular relocation. |
12355 | ||
12356 | template<int size, bool big_endian> | |
12357 | int | |
12358 | Target_mips<size, big_endian>::Scan::get_reference_flags( | |
12359 | unsigned int r_type) | |
12360 | { | |
12361 | switch (r_type) | |
12362 | { | |
12363 | case elfcpp::R_MIPS_NONE: | |
12364 | // No symbol reference. | |
12365 | return 0; | |
12366 | ||
12367 | case elfcpp::R_MIPS_16: | |
12368 | case elfcpp::R_MIPS_32: | |
12369 | case elfcpp::R_MIPS_64: | |
12370 | case elfcpp::R_MIPS_HI16: | |
12371 | case elfcpp::R_MIPS_LO16: | |
e242ece1 VR |
12372 | case elfcpp::R_MIPS_HIGHER: |
12373 | case elfcpp::R_MIPS_HIGHEST: | |
9810d34d SS |
12374 | case elfcpp::R_MIPS16_HI16: |
12375 | case elfcpp::R_MIPS16_LO16: | |
12376 | case elfcpp::R_MICROMIPS_HI16: | |
12377 | case elfcpp::R_MICROMIPS_LO16: | |
e242ece1 VR |
12378 | case elfcpp::R_MICROMIPS_HIGHER: |
12379 | case elfcpp::R_MICROMIPS_HIGHEST: | |
9810d34d SS |
12380 | return Symbol::ABSOLUTE_REF; |
12381 | ||
12382 | case elfcpp::R_MIPS_26: | |
12383 | case elfcpp::R_MIPS16_26: | |
12384 | case elfcpp::R_MICROMIPS_26_S1: | |
12385 | return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; | |
12386 | ||
f5b11759 VR |
12387 | case elfcpp::R_MIPS_PC18_S3: |
12388 | case elfcpp::R_MIPS_PC19_S2: | |
12389 | case elfcpp::R_MIPS_PCHI16: | |
12390 | case elfcpp::R_MIPS_PCLO16: | |
9810d34d SS |
12391 | case elfcpp::R_MIPS_GPREL32: |
12392 | case elfcpp::R_MIPS_GPREL16: | |
12393 | case elfcpp::R_MIPS_REL32: | |
12394 | case elfcpp::R_MIPS16_GPREL: | |
12395 | return Symbol::RELATIVE_REF; | |
12396 | ||
12397 | case elfcpp::R_MIPS_PC16: | |
12398 | case elfcpp::R_MIPS_PC32: | |
f5b11759 VR |
12399 | case elfcpp::R_MIPS_PC21_S2: |
12400 | case elfcpp::R_MIPS_PC26_S2: | |
9810d34d SS |
12401 | case elfcpp::R_MIPS_JALR: |
12402 | case elfcpp::R_MICROMIPS_JALR: | |
12403 | return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; | |
12404 | ||
12405 | case elfcpp::R_MIPS_GOT16: | |
12406 | case elfcpp::R_MIPS_CALL16: | |
12407 | case elfcpp::R_MIPS_GOT_DISP: | |
12408 | case elfcpp::R_MIPS_GOT_HI16: | |
12409 | case elfcpp::R_MIPS_GOT_LO16: | |
12410 | case elfcpp::R_MIPS_CALL_HI16: | |
12411 | case elfcpp::R_MIPS_CALL_LO16: | |
12412 | case elfcpp::R_MIPS_LITERAL: | |
12413 | case elfcpp::R_MIPS_GOT_PAGE: | |
12414 | case elfcpp::R_MIPS_GOT_OFST: | |
12415 | case elfcpp::R_MIPS16_GOT16: | |
12416 | case elfcpp::R_MIPS16_CALL16: | |
12417 | case elfcpp::R_MICROMIPS_GOT16: | |
12418 | case elfcpp::R_MICROMIPS_CALL16: | |
12419 | case elfcpp::R_MICROMIPS_GOT_HI16: | |
12420 | case elfcpp::R_MICROMIPS_GOT_LO16: | |
12421 | case elfcpp::R_MICROMIPS_CALL_HI16: | |
12422 | case elfcpp::R_MICROMIPS_CALL_LO16: | |
47a9f4fc | 12423 | case elfcpp::R_MIPS_EH: |
9810d34d SS |
12424 | // Absolute in GOT. |
12425 | return Symbol::RELATIVE_REF; | |
12426 | ||
12427 | case elfcpp::R_MIPS_TLS_DTPMOD32: | |
12428 | case elfcpp::R_MIPS_TLS_DTPREL32: | |
12429 | case elfcpp::R_MIPS_TLS_DTPMOD64: | |
12430 | case elfcpp::R_MIPS_TLS_DTPREL64: | |
12431 | case elfcpp::R_MIPS_TLS_GD: | |
12432 | case elfcpp::R_MIPS_TLS_LDM: | |
12433 | case elfcpp::R_MIPS_TLS_DTPREL_HI16: | |
12434 | case elfcpp::R_MIPS_TLS_DTPREL_LO16: | |
12435 | case elfcpp::R_MIPS_TLS_GOTTPREL: | |
12436 | case elfcpp::R_MIPS_TLS_TPREL32: | |
12437 | case elfcpp::R_MIPS_TLS_TPREL64: | |
12438 | case elfcpp::R_MIPS_TLS_TPREL_HI16: | |
12439 | case elfcpp::R_MIPS_TLS_TPREL_LO16: | |
12440 | case elfcpp::R_MIPS16_TLS_GD: | |
12441 | case elfcpp::R_MIPS16_TLS_GOTTPREL: | |
12442 | case elfcpp::R_MICROMIPS_TLS_GD: | |
12443 | case elfcpp::R_MICROMIPS_TLS_GOTTPREL: | |
12444 | case elfcpp::R_MICROMIPS_TLS_TPREL_HI16: | |
12445 | case elfcpp::R_MICROMIPS_TLS_TPREL_LO16: | |
12446 | return Symbol::TLS_REF; | |
12447 | ||
12448 | case elfcpp::R_MIPS_COPY: | |
12449 | case elfcpp::R_MIPS_JUMP_SLOT: | |
12450 | default: | |
9810d34d SS |
12451 | // Not expected. We will give an error later. |
12452 | return 0; | |
12453 | } | |
12454 | } | |
12455 | ||
12456 | // Report an unsupported relocation against a local symbol. | |
12457 | ||
12458 | template<int size, bool big_endian> | |
12459 | void | |
12460 | Target_mips<size, big_endian>::Scan::unsupported_reloc_local( | |
12461 | Sized_relobj_file<size, big_endian>* object, | |
12462 | unsigned int r_type) | |
12463 | { | |
12464 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
12465 | object->name().c_str(), r_type); | |
12466 | } | |
12467 | ||
12468 | // Report an unsupported relocation against a global symbol. | |
12469 | ||
12470 | template<int size, bool big_endian> | |
12471 | void | |
12472 | Target_mips<size, big_endian>::Scan::unsupported_reloc_global( | |
12473 | Sized_relobj_file<size, big_endian>* object, | |
12474 | unsigned int r_type, | |
12475 | Symbol* gsym) | |
12476 | { | |
12477 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
12478 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
12479 | } | |
12480 | ||
12481 | // Return printable name for ABI. | |
12482 | template<int size, bool big_endian> | |
12483 | const char* | |
01b84e25 | 12484 | Target_mips<size, big_endian>::elf_mips_abi_name(elfcpp::Elf_Word e_flags) |
9810d34d SS |
12485 | { |
12486 | switch (e_flags & elfcpp::EF_MIPS_ABI) | |
12487 | { | |
12488 | case 0: | |
12489 | if ((e_flags & elfcpp::EF_MIPS_ABI2) != 0) | |
12490 | return "N32"; | |
01b84e25 | 12491 | else if (size == 64) |
9810d34d SS |
12492 | return "64"; |
12493 | else | |
12494 | return "none"; | |
12495 | case elfcpp::E_MIPS_ABI_O32: | |
12496 | return "O32"; | |
12497 | case elfcpp::E_MIPS_ABI_O64: | |
12498 | return "O64"; | |
12499 | case elfcpp::E_MIPS_ABI_EABI32: | |
12500 | return "EABI32"; | |
12501 | case elfcpp::E_MIPS_ABI_EABI64: | |
12502 | return "EABI64"; | |
12503 | default: | |
12504 | return "unknown abi"; | |
12505 | } | |
12506 | } | |
12507 | ||
12508 | template<int size, bool big_endian> | |
12509 | const char* | |
12510 | Target_mips<size, big_endian>::elf_mips_mach_name(elfcpp::Elf_Word e_flags) | |
12511 | { | |
12512 | switch (e_flags & elfcpp::EF_MIPS_MACH) | |
12513 | { | |
12514 | case elfcpp::E_MIPS_MACH_3900: | |
12515 | return "mips:3900"; | |
12516 | case elfcpp::E_MIPS_MACH_4010: | |
12517 | return "mips:4010"; | |
12518 | case elfcpp::E_MIPS_MACH_4100: | |
12519 | return "mips:4100"; | |
12520 | case elfcpp::E_MIPS_MACH_4111: | |
12521 | return "mips:4111"; | |
12522 | case elfcpp::E_MIPS_MACH_4120: | |
12523 | return "mips:4120"; | |
12524 | case elfcpp::E_MIPS_MACH_4650: | |
12525 | return "mips:4650"; | |
12526 | case elfcpp::E_MIPS_MACH_5400: | |
12527 | return "mips:5400"; | |
12528 | case elfcpp::E_MIPS_MACH_5500: | |
12529 | return "mips:5500"; | |
b52717c0 VR |
12530 | case elfcpp::E_MIPS_MACH_5900: |
12531 | return "mips:5900"; | |
9810d34d SS |
12532 | case elfcpp::E_MIPS_MACH_SB1: |
12533 | return "mips:sb1"; | |
12534 | case elfcpp::E_MIPS_MACH_9000: | |
12535 | return "mips:9000"; | |
12536 | case elfcpp::E_MIPS_MACH_LS2E: | |
b52717c0 | 12537 | return "mips:loongson_2e"; |
9810d34d | 12538 | case elfcpp::E_MIPS_MACH_LS2F: |
b52717c0 | 12539 | return "mips:loongson_2f"; |
9810d34d | 12540 | case elfcpp::E_MIPS_MACH_LS3A: |
b52717c0 | 12541 | return "mips:loongson_3a"; |
9810d34d SS |
12542 | case elfcpp::E_MIPS_MACH_OCTEON: |
12543 | return "mips:octeon"; | |
12544 | case elfcpp::E_MIPS_MACH_OCTEON2: | |
12545 | return "mips:octeon2"; | |
b52717c0 VR |
12546 | case elfcpp::E_MIPS_MACH_OCTEON3: |
12547 | return "mips:octeon3"; | |
9810d34d SS |
12548 | case elfcpp::E_MIPS_MACH_XLR: |
12549 | return "mips:xlr"; | |
12550 | default: | |
12551 | switch (e_flags & elfcpp::EF_MIPS_ARCH) | |
12552 | { | |
12553 | default: | |
12554 | case elfcpp::E_MIPS_ARCH_1: | |
12555 | return "mips:3000"; | |
12556 | ||
12557 | case elfcpp::E_MIPS_ARCH_2: | |
12558 | return "mips:6000"; | |
12559 | ||
12560 | case elfcpp::E_MIPS_ARCH_3: | |
12561 | return "mips:4000"; | |
12562 | ||
12563 | case elfcpp::E_MIPS_ARCH_4: | |
12564 | return "mips:8000"; | |
12565 | ||
12566 | case elfcpp::E_MIPS_ARCH_5: | |
12567 | return "mips:mips5"; | |
12568 | ||
12569 | case elfcpp::E_MIPS_ARCH_32: | |
12570 | return "mips:isa32"; | |
12571 | ||
12572 | case elfcpp::E_MIPS_ARCH_64: | |
12573 | return "mips:isa64"; | |
12574 | ||
12575 | case elfcpp::E_MIPS_ARCH_32R2: | |
12576 | return "mips:isa32r2"; | |
12577 | ||
f5b11759 VR |
12578 | case elfcpp::E_MIPS_ARCH_32R6: |
12579 | return "mips:isa32r6"; | |
12580 | ||
9810d34d SS |
12581 | case elfcpp::E_MIPS_ARCH_64R2: |
12582 | return "mips:isa64r2"; | |
f5b11759 VR |
12583 | |
12584 | case elfcpp::E_MIPS_ARCH_64R6: | |
12585 | return "mips:isa64r6"; | |
9810d34d SS |
12586 | } |
12587 | } | |
12588 | return "unknown CPU"; | |
12589 | } | |
12590 | ||
12591 | template<int size, bool big_endian> | |
62661c93 | 12592 | const Target::Target_info Target_mips<size, big_endian>::mips_info = |
9810d34d SS |
12593 | { |
12594 | size, // size | |
12595 | big_endian, // is_big_endian | |
12596 | elfcpp::EM_MIPS, // machine_code | |
12597 | true, // has_make_symbol | |
12598 | false, // has_resolve | |
12599 | false, // has_code_fill | |
12600 | true, // is_default_stack_executable | |
12601 | false, // can_icf_inline_merge_sections | |
12602 | '\0', // wrap_char | |
47a9f4fc | 12603 | size == 32 ? "/lib/ld.so.1" : "/lib64/ld.so.1", // dynamic_linker |
9810d34d SS |
12604 | 0x400000, // default_text_segment_address |
12605 | 64 * 1024, // abi_pagesize (overridable by -z max-page-size) | |
12606 | 4 * 1024, // common_pagesize (overridable by -z common-page-size) | |
12607 | false, // isolate_execinstr | |
12608 | 0, // rosegment_gap | |
12609 | elfcpp::SHN_UNDEF, // small_common_shndx | |
12610 | elfcpp::SHN_UNDEF, // large_common_shndx | |
12611 | 0, // small_common_section_flags | |
12612 | 0, // large_common_section_flags | |
12613 | NULL, // attributes_section | |
12614 | NULL, // attributes_vendor | |
8d9743bd MK |
12615 | "__start", // entry_symbol_name |
12616 | 32, // hash_entry_size | |
9810d34d SS |
12617 | }; |
12618 | ||
62661c93 SS |
12619 | template<int size, bool big_endian> |
12620 | class Target_mips_nacl : public Target_mips<size, big_endian> | |
12621 | { | |
12622 | public: | |
12623 | Target_mips_nacl() | |
12624 | : Target_mips<size, big_endian>(&mips_nacl_info) | |
12625 | { } | |
12626 | ||
12627 | private: | |
12628 | static const Target::Target_info mips_nacl_info; | |
12629 | }; | |
12630 | ||
12631 | template<int size, bool big_endian> | |
12632 | const Target::Target_info Target_mips_nacl<size, big_endian>::mips_nacl_info = | |
12633 | { | |
12634 | size, // size | |
12635 | big_endian, // is_big_endian | |
12636 | elfcpp::EM_MIPS, // machine_code | |
12637 | true, // has_make_symbol | |
12638 | false, // has_resolve | |
12639 | false, // has_code_fill | |
12640 | true, // is_default_stack_executable | |
12641 | false, // can_icf_inline_merge_sections | |
12642 | '\0', // wrap_char | |
12643 | "/lib/ld.so.1", // dynamic_linker | |
12644 | 0x20000, // default_text_segment_address | |
12645 | 0x10000, // abi_pagesize (overridable by -z max-page-size) | |
12646 | 0x10000, // common_pagesize (overridable by -z common-page-size) | |
12647 | true, // isolate_execinstr | |
12648 | 0x10000000, // rosegment_gap | |
12649 | elfcpp::SHN_UNDEF, // small_common_shndx | |
12650 | elfcpp::SHN_UNDEF, // large_common_shndx | |
12651 | 0, // small_common_section_flags | |
12652 | 0, // large_common_section_flags | |
12653 | NULL, // attributes_section | |
12654 | NULL, // attributes_vendor | |
8d9743bd MK |
12655 | "_start", // entry_symbol_name |
12656 | 32, // hash_entry_size | |
62661c93 SS |
12657 | }; |
12658 | ||
12659 | // Target selector for Mips. Note this is never instantiated directly. | |
12660 | // It's only used in Target_selector_mips_nacl, below. | |
9810d34d SS |
12661 | |
12662 | template<int size, bool big_endian> | |
12663 | class Target_selector_mips : public Target_selector | |
12664 | { | |
12665 | public: | |
12666 | Target_selector_mips() | |
12667 | : Target_selector(elfcpp::EM_MIPS, size, big_endian, | |
12668 | (size == 64 ? | |
12669 | (big_endian ? "elf64-tradbigmips" : "elf64-tradlittlemips") : | |
12670 | (big_endian ? "elf32-tradbigmips" : "elf32-tradlittlemips")), | |
12671 | (size == 64 ? | |
47a9f4fc VR |
12672 | (big_endian ? "elf64btsmip" : "elf64ltsmip") : |
12673 | (big_endian ? "elf32btsmip" : "elf32ltsmip"))) | |
9810d34d SS |
12674 | { } |
12675 | ||
12676 | Target* do_instantiate_target() | |
12677 | { return new Target_mips<size, big_endian>(); } | |
12678 | }; | |
12679 | ||
62661c93 SS |
12680 | template<int size, bool big_endian> |
12681 | class Target_selector_mips_nacl | |
12682 | : public Target_selector_nacl<Target_selector_mips<size, big_endian>, | |
12683 | Target_mips_nacl<size, big_endian> > | |
12684 | { | |
12685 | public: | |
12686 | Target_selector_mips_nacl() | |
12687 | : Target_selector_nacl<Target_selector_mips<size, big_endian>, | |
12688 | Target_mips_nacl<size, big_endian> >( | |
12689 | // NaCl currently supports only MIPS32 little-endian. | |
12690 | "mipsel", "elf32-tradlittlemips-nacl", "elf32-tradlittlemips-nacl") | |
12691 | { } | |
12692 | }; | |
9810d34d | 12693 | |
62661c93 SS |
12694 | Target_selector_mips_nacl<32, true> target_selector_mips32; |
12695 | Target_selector_mips_nacl<32, false> target_selector_mips32el; | |
12696 | Target_selector_mips_nacl<64, true> target_selector_mips64; | |
12697 | Target_selector_mips_nacl<64, false> target_selector_mips64el; | |
9810d34d SS |
12698 | |
12699 | } // End anonymous namespace. |