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053a4d68 JY |
1 | // aarch64.cc -- aarch64 target support for gold. |
2 | ||
219d1afa | 3 | // Copyright (C) 2014-2018 Free Software Foundation, Inc. |
9363c7c3 | 4 | // Written by Jing Yu <jingyu@google.com> and Han Shen <shenhan@google.com>. |
053a4d68 JY |
5 | |
6 | // This file is part of gold. | |
7 | ||
8 | // This program is free software; you can redistribute it and/or modify | |
9 | // it under the terms of the GNU General Public License as published by | |
10 | // the Free Software Foundation; either version 3 of the License, or | |
11 | // (at your option) any later version. | |
12 | ||
13 | // This program is distributed in the hope that it will be useful, | |
14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | // GNU General Public License for more details. | |
17 | ||
18 | // You should have received a copy of the GNU General Public License | |
19 | // along with this program; if not, write to the Free Software | |
20 | // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
21 | // MA 02110-1301, USA. | |
22 | ||
23 | #include "gold.h" | |
24 | ||
25 | #include <cstring> | |
5019d64a | 26 | #include <map> |
a48d0c12 | 27 | #include <set> |
053a4d68 JY |
28 | |
29 | #include "elfcpp.h" | |
30 | #include "dwarf.h" | |
31 | #include "parameters.h" | |
32 | #include "reloc.h" | |
33 | #include "aarch64.h" | |
34 | #include "object.h" | |
35 | #include "symtab.h" | |
36 | #include "layout.h" | |
37 | #include "output.h" | |
38 | #include "copy-relocs.h" | |
39 | #include "target.h" | |
40 | #include "target-reloc.h" | |
41 | #include "target-select.h" | |
42 | #include "tls.h" | |
43 | #include "freebsd.h" | |
44 | #include "nacl.h" | |
45 | #include "gc.h" | |
46 | #include "icf.h" | |
9363c7c3 | 47 | #include "aarch64-reloc-property.h" |
053a4d68 JY |
48 | |
49 | // The first three .got.plt entries are reserved. | |
50 | const int32_t AARCH64_GOTPLT_RESERVE_COUNT = 3; | |
51 | ||
83a01957 | 52 | |
053a4d68 JY |
53 | namespace |
54 | { | |
55 | ||
56 | using namespace gold; | |
57 | ||
58 | template<int size, bool big_endian> | |
59 | class Output_data_plt_aarch64; | |
60 | ||
61 | template<int size, bool big_endian> | |
62 | class Output_data_plt_aarch64_standard; | |
63 | ||
64 | template<int size, bool big_endian> | |
65 | class Target_aarch64; | |
66 | ||
9363c7c3 JY |
67 | template<int size, bool big_endian> |
68 | class AArch64_relocate_functions; | |
69 | ||
5019d64a HS |
70 | // Utility class dealing with insns. This is ported from macros in |
71 | // bfd/elfnn-aarch64.cc, but wrapped inside a class as static members. This | |
72 | // class is used in erratum sequence scanning. | |
73 | ||
74 | template<bool big_endian> | |
75 | class AArch64_insn_utilities | |
76 | { | |
77 | public: | |
78 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
79 | ||
2f0c79aa HS |
80 | static const int BYTES_PER_INSN; |
81 | ||
82 | // Zero register encoding - 31. | |
83 | static const unsigned int AARCH64_ZR; | |
5019d64a HS |
84 | |
85 | static unsigned int | |
86 | aarch64_bit(Insntype insn, int pos) | |
87 | { return ((1 << pos) & insn) >> pos; } | |
88 | ||
89 | static unsigned int | |
90 | aarch64_bits(Insntype insn, int pos, int l) | |
91 | { return (insn >> pos) & ((1 << l) - 1); } | |
92 | ||
2f0c79aa HS |
93 | // Get the encoding field "op31" of 3-source data processing insns. "op31" is |
94 | // the name defined in armv8 insn manual C3.5.9. | |
95 | static unsigned int | |
96 | aarch64_op31(Insntype insn) | |
97 | { return aarch64_bits(insn, 21, 3); } | |
98 | ||
99 | // Get the encoding field "ra" of 3-source data processing insns. "ra" is the | |
100 | // third source register. See armv8 insn manual C3.5.9. | |
101 | static unsigned int | |
102 | aarch64_ra(Insntype insn) | |
103 | { return aarch64_bits(insn, 10, 5); } | |
104 | ||
0ef3814f HS |
105 | static bool |
106 | is_adr(const Insntype insn) | |
107 | { return (insn & 0x9F000000) == 0x10000000; } | |
108 | ||
5019d64a HS |
109 | static bool |
110 | is_adrp(const Insntype insn) | |
111 | { return (insn & 0x9F000000) == 0x90000000; } | |
112 | ||
37de058a JW |
113 | static bool |
114 | is_mrs_tpidr_el0(const Insntype insn) | |
115 | { return (insn & 0xFFFFFFE0) == 0xd53bd040; } | |
116 | ||
5019d64a HS |
117 | static unsigned int |
118 | aarch64_rm(const Insntype insn) | |
119 | { return aarch64_bits(insn, 16, 5); } | |
120 | ||
121 | static unsigned int | |
122 | aarch64_rn(const Insntype insn) | |
123 | { return aarch64_bits(insn, 5, 5); } | |
124 | ||
125 | static unsigned int | |
126 | aarch64_rd(const Insntype insn) | |
127 | { return aarch64_bits(insn, 0, 5); } | |
128 | ||
129 | static unsigned int | |
130 | aarch64_rt(const Insntype insn) | |
131 | { return aarch64_bits(insn, 0, 5); } | |
132 | ||
133 | static unsigned int | |
134 | aarch64_rt2(const Insntype insn) | |
135 | { return aarch64_bits(insn, 10, 5); } | |
136 | ||
0ef3814f HS |
137 | // Encode imm21 into adr. Signed imm21 is in the range of [-1M, 1M). |
138 | static Insntype | |
139 | aarch64_adr_encode_imm(Insntype adr, int imm21) | |
140 | { | |
141 | gold_assert(is_adr(adr)); | |
142 | gold_assert(-(1 << 20) <= imm21 && imm21 < (1 << 20)); | |
143 | const int mask19 = (1 << 19) - 1; | |
144 | const int mask2 = 3; | |
145 | adr &= ~((mask19 << 5) | (mask2 << 29)); | |
146 | adr |= ((imm21 & mask2) << 29) | (((imm21 >> 2) & mask19) << 5); | |
147 | return adr; | |
148 | } | |
149 | ||
150 | // Retrieve encoded adrp 33-bit signed imm value. This value is obtained by | |
151 | // 21-bit signed imm encoded in the insn multiplied by 4k (page size) and | |
152 | // 64-bit sign-extended, resulting in [-4G, 4G) with 12-lsb being 0. | |
153 | static int64_t | |
154 | aarch64_adrp_decode_imm(const Insntype adrp) | |
155 | { | |
156 | const int mask19 = (1 << 19) - 1; | |
157 | const int mask2 = 3; | |
158 | gold_assert(is_adrp(adrp)); | |
159 | // 21-bit imm encoded in adrp. | |
160 | uint64_t imm = ((adrp >> 29) & mask2) | (((adrp >> 5) & mask19) << 2); | |
161 | // Retrieve msb of 21-bit-signed imm for sign extension. | |
162 | uint64_t msbt = (imm >> 20) & 1; | |
5c3024d2 | 163 | // Real value is imm multiplied by 4k. Value now has 33-bit information. |
0ef3814f HS |
164 | int64_t value = imm << 12; |
165 | // Sign extend to 64-bit by repeating msbt 31 (64-33) times and merge it | |
166 | // with value. | |
167 | return ((((uint64_t)(1) << 32) - msbt) << 33) | value; | |
168 | } | |
169 | ||
5019d64a HS |
170 | static bool |
171 | aarch64_b(const Insntype insn) | |
172 | { return (insn & 0xFC000000) == 0x14000000; } | |
173 | ||
174 | static bool | |
175 | aarch64_bl(const Insntype insn) | |
176 | { return (insn & 0xFC000000) == 0x94000000; } | |
177 | ||
178 | static bool | |
179 | aarch64_blr(const Insntype insn) | |
180 | { return (insn & 0xFFFFFC1F) == 0xD63F0000; } | |
181 | ||
182 | static bool | |
183 | aarch64_br(const Insntype insn) | |
184 | { return (insn & 0xFFFFFC1F) == 0xD61F0000; } | |
185 | ||
186 | // All ld/st ops. See C4-182 of the ARM ARM. The encoding space for | |
187 | // LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. | |
188 | static bool | |
189 | aarch64_ld(Insntype insn) { return aarch64_bit(insn, 22) == 1; } | |
190 | ||
191 | static bool | |
192 | aarch64_ldst(Insntype insn) | |
193 | { return (insn & 0x0a000000) == 0x08000000; } | |
194 | ||
195 | static bool | |
196 | aarch64_ldst_ex(Insntype insn) | |
197 | { return (insn & 0x3f000000) == 0x08000000; } | |
198 | ||
199 | static bool | |
200 | aarch64_ldst_pcrel(Insntype insn) | |
201 | { return (insn & 0x3b000000) == 0x18000000; } | |
202 | ||
203 | static bool | |
204 | aarch64_ldst_nap(Insntype insn) | |
205 | { return (insn & 0x3b800000) == 0x28000000; } | |
206 | ||
207 | static bool | |
208 | aarch64_ldstp_pi(Insntype insn) | |
209 | { return (insn & 0x3b800000) == 0x28800000; } | |
210 | ||
211 | static bool | |
212 | aarch64_ldstp_o(Insntype insn) | |
213 | { return (insn & 0x3b800000) == 0x29000000; } | |
214 | ||
215 | static bool | |
216 | aarch64_ldstp_pre(Insntype insn) | |
217 | { return (insn & 0x3b800000) == 0x29800000; } | |
218 | ||
219 | static bool | |
220 | aarch64_ldst_ui(Insntype insn) | |
221 | { return (insn & 0x3b200c00) == 0x38000000; } | |
222 | ||
223 | static bool | |
224 | aarch64_ldst_piimm(Insntype insn) | |
225 | { return (insn & 0x3b200c00) == 0x38000400; } | |
226 | ||
227 | static bool | |
228 | aarch64_ldst_u(Insntype insn) | |
229 | { return (insn & 0x3b200c00) == 0x38000800; } | |
230 | ||
231 | static bool | |
232 | aarch64_ldst_preimm(Insntype insn) | |
233 | { return (insn & 0x3b200c00) == 0x38000c00; } | |
234 | ||
235 | static bool | |
236 | aarch64_ldst_ro(Insntype insn) | |
237 | { return (insn & 0x3b200c00) == 0x38200800; } | |
238 | ||
239 | static bool | |
240 | aarch64_ldst_uimm(Insntype insn) | |
241 | { return (insn & 0x3b000000) == 0x39000000; } | |
242 | ||
243 | static bool | |
244 | aarch64_ldst_simd_m(Insntype insn) | |
245 | { return (insn & 0xbfbf0000) == 0x0c000000; } | |
246 | ||
247 | static bool | |
248 | aarch64_ldst_simd_m_pi(Insntype insn) | |
249 | { return (insn & 0xbfa00000) == 0x0c800000; } | |
250 | ||
251 | static bool | |
252 | aarch64_ldst_simd_s(Insntype insn) | |
253 | { return (insn & 0xbf9f0000) == 0x0d000000; } | |
254 | ||
255 | static bool | |
256 | aarch64_ldst_simd_s_pi(Insntype insn) | |
257 | { return (insn & 0xbf800000) == 0x0d800000; } | |
258 | ||
259 | // Classify an INSN if it is indeed a load/store. Return true if INSN is a | |
260 | // LD/ST instruction otherwise return false. For scalar LD/ST instructions | |
261 | // PAIR is FALSE, RT is returned and RT2 is set equal to RT. For LD/ST pair | |
262 | // instructions PAIR is TRUE, RT and RT2 are returned. | |
263 | static bool | |
264 | aarch64_mem_op_p(Insntype insn, unsigned int *rt, unsigned int *rt2, | |
265 | bool *pair, bool *load) | |
266 | { | |
267 | uint32_t opcode; | |
268 | unsigned int r; | |
269 | uint32_t opc = 0; | |
270 | uint32_t v = 0; | |
271 | uint32_t opc_v = 0; | |
272 | ||
de194d85 | 273 | /* Bail out quickly if INSN doesn't fall into the load-store |
5019d64a HS |
274 | encoding space. */ |
275 | if (!aarch64_ldst (insn)) | |
276 | return false; | |
277 | ||
278 | *pair = false; | |
279 | *load = false; | |
280 | if (aarch64_ldst_ex (insn)) | |
281 | { | |
282 | *rt = aarch64_rt (insn); | |
283 | *rt2 = *rt; | |
284 | if (aarch64_bit (insn, 21) == 1) | |
285 | { | |
286 | *pair = true; | |
287 | *rt2 = aarch64_rt2 (insn); | |
288 | } | |
289 | *load = aarch64_ld (insn); | |
290 | return true; | |
291 | } | |
292 | else if (aarch64_ldst_nap (insn) | |
293 | || aarch64_ldstp_pi (insn) | |
294 | || aarch64_ldstp_o (insn) | |
295 | || aarch64_ldstp_pre (insn)) | |
296 | { | |
297 | *pair = true; | |
298 | *rt = aarch64_rt (insn); | |
299 | *rt2 = aarch64_rt2 (insn); | |
300 | *load = aarch64_ld (insn); | |
301 | return true; | |
302 | } | |
303 | else if (aarch64_ldst_pcrel (insn) | |
304 | || aarch64_ldst_ui (insn) | |
305 | || aarch64_ldst_piimm (insn) | |
306 | || aarch64_ldst_u (insn) | |
307 | || aarch64_ldst_preimm (insn) | |
308 | || aarch64_ldst_ro (insn) | |
309 | || aarch64_ldst_uimm (insn)) | |
310 | { | |
311 | *rt = aarch64_rt (insn); | |
312 | *rt2 = *rt; | |
313 | if (aarch64_ldst_pcrel (insn)) | |
314 | *load = true; | |
315 | opc = aarch64_bits (insn, 22, 2); | |
316 | v = aarch64_bit (insn, 26); | |
317 | opc_v = opc | (v << 2); | |
318 | *load = (opc_v == 1 || opc_v == 2 || opc_v == 3 | |
319 | || opc_v == 5 || opc_v == 7); | |
320 | return true; | |
321 | } | |
322 | else if (aarch64_ldst_simd_m (insn) | |
323 | || aarch64_ldst_simd_m_pi (insn)) | |
324 | { | |
325 | *rt = aarch64_rt (insn); | |
326 | *load = aarch64_bit (insn, 22); | |
327 | opcode = (insn >> 12) & 0xf; | |
328 | switch (opcode) | |
329 | { | |
330 | case 0: | |
331 | case 2: | |
332 | *rt2 = *rt + 3; | |
333 | break; | |
334 | ||
335 | case 4: | |
336 | case 6: | |
337 | *rt2 = *rt + 2; | |
338 | break; | |
339 | ||
340 | case 7: | |
341 | *rt2 = *rt; | |
342 | break; | |
343 | ||
344 | case 8: | |
345 | case 10: | |
346 | *rt2 = *rt + 1; | |
347 | break; | |
348 | ||
349 | default: | |
350 | return false; | |
351 | } | |
352 | return true; | |
353 | } | |
354 | else if (aarch64_ldst_simd_s (insn) | |
355 | || aarch64_ldst_simd_s_pi (insn)) | |
356 | { | |
357 | *rt = aarch64_rt (insn); | |
358 | r = (insn >> 21) & 1; | |
359 | *load = aarch64_bit (insn, 22); | |
360 | opcode = (insn >> 13) & 0x7; | |
361 | switch (opcode) | |
362 | { | |
363 | case 0: | |
364 | case 2: | |
365 | case 4: | |
366 | *rt2 = *rt + r; | |
367 | break; | |
368 | ||
369 | case 1: | |
370 | case 3: | |
371 | case 5: | |
372 | *rt2 = *rt + (r == 0 ? 2 : 3); | |
373 | break; | |
374 | ||
375 | case 6: | |
376 | *rt2 = *rt + r; | |
377 | break; | |
378 | ||
379 | case 7: | |
380 | *rt2 = *rt + (r == 0 ? 2 : 3); | |
381 | break; | |
382 | ||
383 | default: | |
384 | return false; | |
385 | } | |
386 | return true; | |
387 | } | |
388 | return false; | |
2f0c79aa HS |
389 | } // End of "aarch64_mem_op_p". |
390 | ||
391 | // Return true if INSN is mac insn. | |
392 | static bool | |
393 | aarch64_mac(Insntype insn) | |
394 | { return (insn & 0xff000000) == 0x9b000000; } | |
395 | ||
396 | // Return true if INSN is multiply-accumulate. | |
397 | // (This is similar to implementaton in elfnn-aarch64.c.) | |
398 | static bool | |
399 | aarch64_mlxl(Insntype insn) | |
400 | { | |
401 | uint32_t op31 = aarch64_op31(insn); | |
402 | if (aarch64_mac(insn) | |
403 | && (op31 == 0 || op31 == 1 || op31 == 5) | |
404 | /* Exclude MUL instructions which are encoded as a multiple-accumulate | |
405 | with RA = XZR. */ | |
406 | && aarch64_ra(insn) != AARCH64_ZR) | |
407 | { | |
408 | return true; | |
409 | } | |
410 | return false; | |
5019d64a | 411 | } |
2f0c79aa HS |
412 | }; // End of "AArch64_insn_utilities". |
413 | ||
414 | ||
415 | // Insn length in byte. | |
416 | ||
417 | template<bool big_endian> | |
418 | const int AArch64_insn_utilities<big_endian>::BYTES_PER_INSN = 4; | |
419 | ||
420 | ||
421 | // Zero register encoding - 31. | |
422 | ||
423 | template<bool big_endian> | |
424 | const unsigned int AArch64_insn_utilities<big_endian>::AARCH64_ZR = 0x1f; | |
5019d64a HS |
425 | |
426 | ||
053a4d68 JY |
427 | // Output_data_got_aarch64 class. |
428 | ||
429 | template<int size, bool big_endian> | |
430 | class Output_data_got_aarch64 : public Output_data_got<size, big_endian> | |
431 | { | |
432 | public: | |
433 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype; | |
434 | Output_data_got_aarch64(Symbol_table* symtab, Layout* layout) | |
9363c7c3 JY |
435 | : Output_data_got<size, big_endian>(), |
436 | symbol_table_(symtab), layout_(layout) | |
053a4d68 JY |
437 | { } |
438 | ||
8e33481e HS |
439 | // Add a static entry for the GOT entry at OFFSET. GSYM is a global |
440 | // symbol and R_TYPE is the code of a dynamic relocation that needs to be | |
441 | // applied in a static link. | |
442 | void | |
443 | add_static_reloc(unsigned int got_offset, unsigned int r_type, Symbol* gsym) | |
444 | { this->static_relocs_.push_back(Static_reloc(got_offset, r_type, gsym)); } | |
445 | ||
446 | ||
447 | // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object | |
448 | // defining a local symbol with INDEX. R_TYPE is the code of a dynamic | |
449 | // relocation that needs to be applied in a static link. | |
450 | void | |
451 | add_static_reloc(unsigned int got_offset, unsigned int r_type, | |
452 | Sized_relobj_file<size, big_endian>* relobj, | |
453 | unsigned int index) | |
454 | { | |
455 | this->static_relocs_.push_back(Static_reloc(got_offset, r_type, relobj, | |
456 | index)); | |
457 | } | |
458 | ||
459 | ||
053a4d68 JY |
460 | protected: |
461 | // Write out the GOT table. | |
462 | void | |
463 | do_write(Output_file* of) { | |
464 | // The first entry in the GOT is the address of the .dynamic section. | |
465 | gold_assert(this->data_size() >= size / 8); | |
466 | Output_section* dynamic = this->layout_->dynamic_section(); | |
467 | Valtype dynamic_addr = dynamic == NULL ? 0 : dynamic->address(); | |
468 | this->replace_constant(0, dynamic_addr); | |
469 | Output_data_got<size, big_endian>::do_write(of); | |
8e33481e HS |
470 | |
471 | // Handling static relocs | |
472 | if (this->static_relocs_.empty()) | |
473 | return; | |
474 | ||
475 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
476 | ||
477 | gold_assert(parameters->doing_static_link()); | |
478 | const off_t offset = this->offset(); | |
479 | const section_size_type oview_size = | |
480 | convert_to_section_size_type(this->data_size()); | |
481 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
482 | ||
483 | Output_segment* tls_segment = this->layout_->tls_segment(); | |
484 | gold_assert(tls_segment != NULL); | |
485 | ||
486 | AArch64_address aligned_tcb_address = | |
83a01957 | 487 | align_address(Target_aarch64<size, big_endian>::TCB_SIZE, |
8e33481e HS |
488 | tls_segment->maximum_alignment()); |
489 | ||
490 | for (size_t i = 0; i < this->static_relocs_.size(); ++i) | |
491 | { | |
492 | Static_reloc& reloc(this->static_relocs_[i]); | |
493 | AArch64_address value; | |
494 | ||
495 | if (!reloc.symbol_is_global()) | |
496 | { | |
497 | Sized_relobj_file<size, big_endian>* object = reloc.relobj(); | |
498 | const Symbol_value<size>* psymval = | |
499 | reloc.relobj()->local_symbol(reloc.index()); | |
500 | ||
501 | // We are doing static linking. Issue an error and skip this | |
502 | // relocation if the symbol is undefined or in a discarded_section. | |
503 | bool is_ordinary; | |
504 | unsigned int shndx = psymval->input_shndx(&is_ordinary); | |
505 | if ((shndx == elfcpp::SHN_UNDEF) | |
506 | || (is_ordinary | |
507 | && shndx != elfcpp::SHN_UNDEF | |
508 | && !object->is_section_included(shndx) | |
509 | && !this->symbol_table_->is_section_folded(object, shndx))) | |
510 | { | |
511 | gold_error(_("undefined or discarded local symbol %u from " | |
512 | " object %s in GOT"), | |
513 | reloc.index(), reloc.relobj()->name().c_str()); | |
514 | continue; | |
515 | } | |
516 | value = psymval->value(object, 0); | |
517 | } | |
518 | else | |
519 | { | |
520 | const Symbol* gsym = reloc.symbol(); | |
521 | gold_assert(gsym != NULL); | |
522 | if (gsym->is_forwarder()) | |
523 | gsym = this->symbol_table_->resolve_forwards(gsym); | |
524 | ||
525 | // We are doing static linking. Issue an error and skip this | |
526 | // relocation if the symbol is undefined or in a discarded_section | |
527 | // unless it is a weakly_undefined symbol. | |
528 | if ((gsym->is_defined_in_discarded_section() | |
529 | || gsym->is_undefined()) | |
530 | && !gsym->is_weak_undefined()) | |
531 | { | |
532 | gold_error(_("undefined or discarded symbol %s in GOT"), | |
533 | gsym->name()); | |
534 | continue; | |
535 | } | |
536 | ||
537 | if (!gsym->is_weak_undefined()) | |
538 | { | |
539 | const Sized_symbol<size>* sym = | |
540 | static_cast<const Sized_symbol<size>*>(gsym); | |
541 | value = sym->value(); | |
542 | } | |
543 | else | |
544 | value = 0; | |
545 | } | |
546 | ||
547 | unsigned got_offset = reloc.got_offset(); | |
548 | gold_assert(got_offset < oview_size); | |
549 | ||
550 | typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype; | |
551 | Valtype* wv = reinterpret_cast<Valtype*>(oview + got_offset); | |
552 | Valtype x; | |
553 | switch (reloc.r_type()) | |
554 | { | |
555 | case elfcpp::R_AARCH64_TLS_DTPREL64: | |
556 | x = value; | |
557 | break; | |
558 | case elfcpp::R_AARCH64_TLS_TPREL64: | |
559 | x = value + aligned_tcb_address; | |
560 | break; | |
561 | default: | |
562 | gold_unreachable(); | |
563 | } | |
564 | elfcpp::Swap<size, big_endian>::writeval(wv, x); | |
565 | } | |
566 | ||
567 | of->write_output_view(offset, oview_size, oview); | |
053a4d68 JY |
568 | } |
569 | ||
570 | private: | |
9363c7c3 JY |
571 | // Symbol table of the output object. |
572 | Symbol_table* symbol_table_; | |
053a4d68 JY |
573 | // A pointer to the Layout class, so that we can find the .dynamic |
574 | // section when we write out the GOT section. | |
575 | Layout* layout_; | |
8e33481e | 576 | |
8e33481e HS |
577 | // This class represent dynamic relocations that need to be applied by |
578 | // gold because we are using TLS relocations in a static link. | |
579 | class Static_reloc | |
580 | { | |
581 | public: | |
582 | Static_reloc(unsigned int got_offset, unsigned int r_type, Symbol* gsym) | |
583 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(true) | |
584 | { this->u_.global.symbol = gsym; } | |
585 | ||
586 | Static_reloc(unsigned int got_offset, unsigned int r_type, | |
587 | Sized_relobj_file<size, big_endian>* relobj, unsigned int index) | |
588 | : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(false) | |
589 | { | |
590 | this->u_.local.relobj = relobj; | |
591 | this->u_.local.index = index; | |
592 | } | |
593 | ||
594 | // Return the GOT offset. | |
595 | unsigned int | |
596 | got_offset() const | |
597 | { return this->got_offset_; } | |
598 | ||
599 | // Relocation type. | |
600 | unsigned int | |
601 | r_type() const | |
602 | { return this->r_type_; } | |
603 | ||
604 | // Whether the symbol is global or not. | |
605 | bool | |
606 | symbol_is_global() const | |
607 | { return this->symbol_is_global_; } | |
608 | ||
609 | // For a relocation against a global symbol, the global symbol. | |
610 | Symbol* | |
611 | symbol() const | |
612 | { | |
613 | gold_assert(this->symbol_is_global_); | |
614 | return this->u_.global.symbol; | |
615 | } | |
616 | ||
617 | // For a relocation against a local symbol, the defining object. | |
618 | Sized_relobj_file<size, big_endian>* | |
619 | relobj() const | |
620 | { | |
621 | gold_assert(!this->symbol_is_global_); | |
622 | return this->u_.local.relobj; | |
623 | } | |
624 | ||
625 | // For a relocation against a local symbol, the local symbol index. | |
626 | unsigned int | |
627 | index() const | |
628 | { | |
629 | gold_assert(!this->symbol_is_global_); | |
630 | return this->u_.local.index; | |
631 | } | |
632 | ||
633 | private: | |
634 | // GOT offset of the entry to which this relocation is applied. | |
635 | unsigned int got_offset_; | |
636 | // Type of relocation. | |
637 | unsigned int r_type_; | |
638 | // Whether this relocation is against a global symbol. | |
639 | bool symbol_is_global_; | |
640 | // A global or local symbol. | |
641 | union | |
642 | { | |
83a01957 HS |
643 | struct |
644 | { | |
645 | // For a global symbol, the symbol itself. | |
646 | Symbol* symbol; | |
647 | } global; | |
648 | struct | |
649 | { | |
650 | // For a local symbol, the object defining the symbol. | |
651 | Sized_relobj_file<size, big_endian>* relobj; | |
652 | // For a local symbol, the symbol index. | |
653 | unsigned int index; | |
654 | } local; | |
655 | } u_; | |
656 | }; // End of inner class Static_reloc | |
657 | ||
658 | std::vector<Static_reloc> static_relocs_; | |
659 | }; // End of Output_data_got_aarch64 | |
660 | ||
661 | ||
662 | template<int size, bool big_endian> | |
663 | class AArch64_input_section; | |
664 | ||
665 | ||
666 | template<int size, bool big_endian> | |
667 | class AArch64_output_section; | |
668 | ||
669 | ||
83a01957 | 670 | template<int size, bool big_endian> |
a48d0c12 HS |
671 | class AArch64_relobj; |
672 | ||
673 | ||
674 | // Stub type enum constants. | |
675 | ||
676 | enum | |
83a01957 | 677 | { |
a48d0c12 | 678 | ST_NONE = 0, |
83a01957 | 679 | |
a48d0c12 HS |
680 | // Using adrp/add pair, 4 insns (including alignment) without mem access, |
681 | // the fastest stub. This has a limited jump distance, which is tested by | |
682 | // aarch64_valid_for_adrp_p. | |
683 | ST_ADRP_BRANCH = 1, | |
83a01957 | 684 | |
a48d0c12 HS |
685 | // Using ldr-absolute-address/br-register, 4 insns with 1 mem access, |
686 | // unlimited in jump distance. | |
687 | ST_LONG_BRANCH_ABS = 2, | |
83a01957 | 688 | |
a48d0c12 HS |
689 | // Using ldr/calculate-pcrel/jump, 8 insns (including alignment) with 1 |
690 | // mem access, slowest one. Only used in position independent executables. | |
691 | ST_LONG_BRANCH_PCREL = 3, | |
83a01957 | 692 | |
a48d0c12 HS |
693 | // Stub for erratum 843419 handling. |
694 | ST_E_843419 = 4, | |
83a01957 | 695 | |
2f0c79aa HS |
696 | // Stub for erratum 835769 handling. |
697 | ST_E_835769 = 5, | |
698 | ||
a48d0c12 | 699 | // Number of total stub types. |
2f0c79aa | 700 | ST_NUMBER = 6 |
a48d0c12 | 701 | }; |
83a01957 | 702 | |
83a01957 | 703 | |
a48d0c12 HS |
704 | // Struct that wraps insns for a particular stub. All stub templates are |
705 | // created/initialized as constants by Stub_template_repertoire. | |
83a01957 | 706 | |
a48d0c12 HS |
707 | template<bool big_endian> |
708 | struct Stub_template | |
709 | { | |
710 | const typename AArch64_insn_utilities<big_endian>::Insntype* insns; | |
711 | const int insn_num; | |
712 | }; | |
83a01957 | 713 | |
83a01957 | 714 | |
a48d0c12 HS |
715 | // Simple singleton class that creates/initializes/stores all types of stub |
716 | // templates. | |
717 | ||
718 | template<bool big_endian> | |
719 | class Stub_template_repertoire | |
720 | { | |
721 | public: | |
722 | typedef typename AArch64_insn_utilities<big_endian>::Insntype Insntype; | |
723 | ||
724 | // Single static method to get stub template for a given stub type. | |
725 | static const Stub_template<big_endian>* | |
726 | get_stub_template(int type) | |
83a01957 | 727 | { |
a48d0c12 HS |
728 | static Stub_template_repertoire<big_endian> singleton; |
729 | return singleton.stub_templates_[type]; | |
83a01957 HS |
730 | } |
731 | ||
a48d0c12 HS |
732 | private: |
733 | // Constructor - creates/initializes all stub templates. | |
734 | Stub_template_repertoire(); | |
735 | ~Stub_template_repertoire() | |
83a01957 HS |
736 | { } |
737 | ||
a48d0c12 HS |
738 | // Disallowing copy ctor and copy assignment operator. |
739 | Stub_template_repertoire(Stub_template_repertoire&); | |
740 | Stub_template_repertoire& operator=(Stub_template_repertoire&); | |
83a01957 | 741 | |
a48d0c12 HS |
742 | // Data that stores all insn templates. |
743 | const Stub_template<big_endian>* stub_templates_[ST_NUMBER]; | |
744 | }; // End of "class Stub_template_repertoire". | |
745 | ||
746 | ||
747 | // Constructor - creates/initilizes all stub templates. | |
748 | ||
749 | template<bool big_endian> | |
750 | Stub_template_repertoire<big_endian>::Stub_template_repertoire() | |
751 | { | |
752 | // Insn array definitions. | |
753 | const static Insntype ST_NONE_INSNS[] = {}; | |
754 | ||
755 | const static Insntype ST_ADRP_BRANCH_INSNS[] = | |
756 | { | |
757 | 0x90000010, /* adrp ip0, X */ | |
758 | /* ADR_PREL_PG_HI21(X) */ | |
759 | 0x91000210, /* add ip0, ip0, :lo12:X */ | |
760 | /* ADD_ABS_LO12_NC(X) */ | |
761 | 0xd61f0200, /* br ip0 */ | |
762 | 0x00000000, /* alignment padding */ | |
763 | }; | |
764 | ||
765 | const static Insntype ST_LONG_BRANCH_ABS_INSNS[] = | |
766 | { | |
767 | 0x58000050, /* ldr ip0, 0x8 */ | |
768 | 0xd61f0200, /* br ip0 */ | |
769 | 0x00000000, /* address field */ | |
770 | 0x00000000, /* address fields */ | |
771 | }; | |
772 | ||
773 | const static Insntype ST_LONG_BRANCH_PCREL_INSNS[] = | |
774 | { | |
775 | 0x58000090, /* ldr ip0, 0x10 */ | |
776 | 0x10000011, /* adr ip1, #0 */ | |
777 | 0x8b110210, /* add ip0, ip0, ip1 */ | |
778 | 0xd61f0200, /* br ip0 */ | |
779 | 0x00000000, /* address field */ | |
780 | 0x00000000, /* address field */ | |
781 | 0x00000000, /* alignment padding */ | |
782 | 0x00000000, /* alignment padding */ | |
783 | }; | |
784 | ||
785 | const static Insntype ST_E_843419_INSNS[] = | |
786 | { | |
787 | 0x00000000, /* Placeholder for erratum insn. */ | |
788 | 0x14000000, /* b <label> */ | |
789 | }; | |
790 | ||
a24df305 NC |
791 | // ST_E_835769 has the same stub template as ST_E_843419 |
792 | // but we reproduce the array here so that the sizeof | |
793 | // expressions in install_insn_template will work. | |
794 | const static Insntype ST_E_835769_INSNS[] = | |
795 | { | |
796 | 0x00000000, /* Placeholder for erratum insn. */ | |
797 | 0x14000000, /* b <label> */ | |
798 | }; | |
2f0c79aa | 799 | |
a48d0c12 HS |
800 | #define install_insn_template(T) \ |
801 | const static Stub_template<big_endian> template_##T = { \ | |
802 | T##_INSNS, sizeof(T##_INSNS) / sizeof(T##_INSNS[0]) }; \ | |
803 | this->stub_templates_[T] = &template_##T | |
804 | ||
805 | install_insn_template(ST_NONE); | |
806 | install_insn_template(ST_ADRP_BRANCH); | |
807 | install_insn_template(ST_LONG_BRANCH_ABS); | |
808 | install_insn_template(ST_LONG_BRANCH_PCREL); | |
809 | install_insn_template(ST_E_843419); | |
2f0c79aa | 810 | install_insn_template(ST_E_835769); |
a48d0c12 HS |
811 | |
812 | #undef install_insn_template | |
813 | } | |
814 | ||
815 | ||
816 | // Base class for stubs. | |
817 | ||
818 | template<int size, bool big_endian> | |
819 | class Stub_base | |
820 | { | |
821 | public: | |
822 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
823 | typedef typename AArch64_insn_utilities<big_endian>::Insntype Insntype; | |
824 | ||
825 | static const AArch64_address invalid_address = | |
826 | static_cast<AArch64_address>(-1); | |
827 | ||
828 | static const section_offset_type invalid_offset = | |
829 | static_cast<section_offset_type>(-1); | |
830 | ||
831 | Stub_base(int type) | |
832 | : destination_address_(invalid_address), | |
833 | offset_(invalid_offset), | |
834 | type_(type) | |
835 | {} | |
836 | ||
837 | ~Stub_base() | |
838 | {} | |
839 | ||
840 | // Get stub type. | |
841 | int | |
842 | type() const | |
843 | { return this->type_; } | |
844 | ||
845 | // Get stub template that provides stub insn information. | |
846 | const Stub_template<big_endian>* | |
847 | stub_template() const | |
83a01957 | 848 | { |
a48d0c12 HS |
849 | return Stub_template_repertoire<big_endian>:: |
850 | get_stub_template(this->type()); | |
83a01957 HS |
851 | } |
852 | ||
a48d0c12 | 853 | // Get destination address. |
83a01957 HS |
854 | AArch64_address |
855 | destination_address() const | |
856 | { | |
857 | gold_assert(this->destination_address_ != this->invalid_address); | |
858 | return this->destination_address_; | |
859 | } | |
860 | ||
861 | // Set destination address. | |
862 | void | |
863 | set_destination_address(AArch64_address address) | |
864 | { | |
865 | gold_assert(address != this->invalid_address); | |
866 | this->destination_address_ = address; | |
867 | } | |
868 | ||
869 | // Reset the destination address. | |
870 | void | |
871 | reset_destination_address() | |
872 | { this->destination_address_ = this->invalid_address; } | |
873 | ||
a48d0c12 HS |
874 | // Get offset of code stub. For Reloc_stub, it is the offset from the |
875 | // beginning of its containing stub table; for Erratum_stub, it is the offset | |
876 | // from the end of reloc_stubs. | |
877 | section_offset_type | |
878 | offset() const | |
879 | { | |
880 | gold_assert(this->offset_ != this->invalid_offset); | |
881 | return this->offset_; | |
882 | } | |
83a01957 | 883 | |
a48d0c12 HS |
884 | // Set stub offset. |
885 | void | |
886 | set_offset(section_offset_type offset) | |
887 | { this->offset_ = offset; } | |
83a01957 | 888 | |
a48d0c12 HS |
889 | // Return the stub insn. |
890 | const Insntype* | |
891 | insns() const | |
892 | { return this->stub_template()->insns; } | |
83a01957 | 893 | |
a48d0c12 HS |
894 | // Return num of stub insns. |
895 | unsigned int | |
896 | insn_num() const | |
897 | { return this->stub_template()->insn_num; } | |
898 | ||
899 | // Get size of the stub. | |
900 | int | |
901 | stub_size() const | |
902 | { | |
903 | return this->insn_num() * | |
904 | AArch64_insn_utilities<big_endian>::BYTES_PER_INSN; | |
905 | } | |
83a01957 HS |
906 | |
907 | // Write stub to output file. | |
908 | void | |
909 | write(unsigned char* view, section_size_type view_size) | |
910 | { this->do_write(view, view_size); } | |
911 | ||
a48d0c12 HS |
912 | protected: |
913 | // Abstract method to be implemented by sub-classes. | |
914 | virtual void | |
915 | do_write(unsigned char*, section_size_type) = 0; | |
916 | ||
917 | private: | |
918 | // The last insn of a stub is a jump to destination insn. This field records | |
919 | // the destination address. | |
920 | AArch64_address destination_address_; | |
921 | // The stub offset. Note this has difference interpretations between an | |
922 | // Reloc_stub and an Erratum_stub. For Reloc_stub this is the offset from the | |
923 | // beginning of the containing stub_table, whereas for Erratum_stub, this is | |
924 | // the offset from the end of reloc_stubs. | |
925 | section_offset_type offset_; | |
926 | // Stub type. | |
927 | const int type_; | |
928 | }; // End of "Stub_base". | |
929 | ||
930 | ||
931 | // Erratum stub class. An erratum stub differs from a reloc stub in that for | |
932 | // each erratum occurrence, we generate an erratum stub. We never share erratum | |
c092b67b | 933 | // stubs, whereas for reloc stubs, different branch insns share a single reloc |
a48d0c12 HS |
934 | // stub as long as the branch targets are the same. (More to the point, reloc |
935 | // stubs can be shared because they're used to reach a specific target, whereas | |
936 | // erratum stubs branch back to the original control flow.) | |
937 | ||
938 | template<int size, bool big_endian> | |
939 | class Erratum_stub : public Stub_base<size, big_endian> | |
940 | { | |
941 | public: | |
942 | typedef AArch64_relobj<size, big_endian> The_aarch64_relobj; | |
943 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
56b06706 | 944 | typedef AArch64_insn_utilities<big_endian> Insn_utilities; |
a48d0c12 HS |
945 | typedef typename AArch64_insn_utilities<big_endian>::Insntype Insntype; |
946 | ||
5d7908e0 | 947 | static const int STUB_ADDR_ALIGN; |
a48d0c12 HS |
948 | |
949 | static const Insntype invalid_insn = static_cast<Insntype>(-1); | |
950 | ||
951 | Erratum_stub(The_aarch64_relobj* relobj, int type, | |
952 | unsigned shndx, unsigned int sh_offset) | |
953 | : Stub_base<size, big_endian>(type), relobj_(relobj), | |
954 | shndx_(shndx), sh_offset_(sh_offset), | |
955 | erratum_insn_(invalid_insn), | |
956 | erratum_address_(this->invalid_address) | |
957 | {} | |
958 | ||
959 | ~Erratum_stub() {} | |
960 | ||
961 | // Return the object that contains the erratum. | |
962 | The_aarch64_relobj* | |
963 | relobj() | |
964 | { return this->relobj_; } | |
965 | ||
966 | // Get section index of the erratum. | |
967 | unsigned int | |
968 | shndx() const | |
969 | { return this->shndx_; } | |
970 | ||
971 | // Get section offset of the erratum. | |
972 | unsigned int | |
973 | sh_offset() const | |
974 | { return this->sh_offset_; } | |
975 | ||
976 | // Get the erratum insn. This is the insn located at erratum_insn_address. | |
977 | Insntype | |
978 | erratum_insn() const | |
979 | { | |
980 | gold_assert(this->erratum_insn_ != this->invalid_insn); | |
981 | return this->erratum_insn_; | |
982 | } | |
983 | ||
984 | // Set the insn that the erratum happens to. | |
985 | void | |
986 | set_erratum_insn(Insntype insn) | |
987 | { this->erratum_insn_ = insn; } | |
988 | ||
56b06706 HS |
989 | // For 843419, the erratum insn is ld/st xt, [xn, #uimm], which may be a |
990 | // relocation spot, in this case, the erratum_insn_ recorded at scanning phase | |
991 | // is no longer the one we want to write out to the stub, update erratum_insn_ | |
992 | // with relocated version. Also note that in this case xn must not be "PC", so | |
993 | // it is safe to move the erratum insn from the origin place to the stub. For | |
994 | // 835769, the erratum insn is multiply-accumulate insn, which could not be a | |
995 | // relocation spot (assertion added though). | |
996 | void | |
997 | update_erratum_insn(Insntype insn) | |
998 | { | |
999 | gold_assert(this->erratum_insn_ != this->invalid_insn); | |
1000 | switch (this->type()) | |
1001 | { | |
1002 | case ST_E_843419: | |
1003 | gold_assert(Insn_utilities::aarch64_ldst_uimm(insn)); | |
1004 | gold_assert(Insn_utilities::aarch64_ldst_uimm(this->erratum_insn())); | |
1005 | gold_assert(Insn_utilities::aarch64_rd(insn) == | |
1006 | Insn_utilities::aarch64_rd(this->erratum_insn())); | |
1007 | gold_assert(Insn_utilities::aarch64_rn(insn) == | |
1008 | Insn_utilities::aarch64_rn(this->erratum_insn())); | |
1009 | // Update plain ld/st insn with relocated insn. | |
1010 | this->erratum_insn_ = insn; | |
1011 | break; | |
1012 | case ST_E_835769: | |
1013 | gold_assert(insn == this->erratum_insn()); | |
1014 | break; | |
1015 | default: | |
1016 | gold_unreachable(); | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | ||
a48d0c12 HS |
1021 | // Return the address where an erratum must be done. |
1022 | AArch64_address | |
1023 | erratum_address() const | |
1024 | { | |
1025 | gold_assert(this->erratum_address_ != this->invalid_address); | |
1026 | return this->erratum_address_; | |
1027 | } | |
1028 | ||
1029 | // Set the address where an erratum must be done. | |
1030 | void | |
1031 | set_erratum_address(AArch64_address addr) | |
1032 | { this->erratum_address_ = addr; } | |
1033 | ||
fd6798fa PS |
1034 | // Later relaxation passes of may alter the recorded erratum and destination |
1035 | // address. Given an up to date output section address of shidx_ in | |
1036 | // relobj_ we can derive the erratum_address and destination address. | |
1037 | void | |
1038 | update_erratum_address(AArch64_address output_section_addr) | |
1039 | { | |
1040 | const int BPI = AArch64_insn_utilities<big_endian>::BYTES_PER_INSN; | |
1041 | AArch64_address updated_addr = output_section_addr + this->sh_offset_; | |
1042 | this->set_erratum_address(updated_addr); | |
1043 | this->set_destination_address(updated_addr + BPI); | |
1044 | } | |
1045 | ||
a48d0c12 | 1046 | // Comparator used to group Erratum_stubs in a set by (obj, shndx, |
5c3024d2 | 1047 | // sh_offset). We do not include 'type' in the calculation, because there is |
a48d0c12 HS |
1048 | // at most one stub type at (obj, shndx, sh_offset). |
1049 | bool | |
1050 | operator<(const Erratum_stub<size, big_endian>& k) const | |
1051 | { | |
1052 | if (this == &k) | |
1053 | return false; | |
1054 | // We group stubs by relobj. | |
1055 | if (this->relobj_ != k.relobj_) | |
1056 | return this->relobj_ < k.relobj_; | |
1057 | // Then by section index. | |
1058 | if (this->shndx_ != k.shndx_) | |
1059 | return this->shndx_ < k.shndx_; | |
1060 | // Lastly by section offset. | |
1061 | return this->sh_offset_ < k.sh_offset_; | |
1062 | } | |
1063 | ||
df2f63a6 HS |
1064 | void |
1065 | invalidate_erratum_stub() | |
1066 | { | |
e0feb133 CC |
1067 | gold_assert(this->erratum_insn_ != invalid_insn); |
1068 | this->erratum_insn_ = invalid_insn; | |
df2f63a6 HS |
1069 | } |
1070 | ||
1071 | bool | |
1072 | is_invalidated_erratum_stub() | |
e0feb133 | 1073 | { return this->erratum_insn_ == invalid_insn; } |
df2f63a6 | 1074 | |
a48d0c12 HS |
1075 | protected: |
1076 | virtual void | |
1077 | do_write(unsigned char*, section_size_type); | |
1078 | ||
1079 | private: | |
1080 | // The object that needs to be fixed. | |
1081 | The_aarch64_relobj* relobj_; | |
1082 | // The shndx in the object that needs to be fixed. | |
1083 | const unsigned int shndx_; | |
1084 | // The section offset in the obejct that needs to be fixed. | |
1085 | const unsigned int sh_offset_; | |
1086 | // The insn to be fixed. | |
1087 | Insntype erratum_insn_; | |
1088 | // The address of the above insn. | |
1089 | AArch64_address erratum_address_; | |
1090 | }; // End of "Erratum_stub". | |
1091 | ||
0ef3814f HS |
1092 | |
1093 | // Erratum sub class to wrap additional info needed by 843419. In fixing this | |
1094 | // erratum, we may choose to replace 'adrp' with 'adr', in this case, we need | |
1095 | // adrp's code position (two or three insns before erratum insn itself). | |
1096 | ||
1097 | template<int size, bool big_endian> | |
1098 | class E843419_stub : public Erratum_stub<size, big_endian> | |
1099 | { | |
1100 | public: | |
1101 | typedef typename AArch64_insn_utilities<big_endian>::Insntype Insntype; | |
1102 | ||
1103 | E843419_stub(AArch64_relobj<size, big_endian>* relobj, | |
1104 | unsigned int shndx, unsigned int sh_offset, | |
1105 | unsigned int adrp_sh_offset) | |
1106 | : Erratum_stub<size, big_endian>(relobj, ST_E_843419, shndx, sh_offset), | |
1107 | adrp_sh_offset_(adrp_sh_offset) | |
1108 | {} | |
1109 | ||
1110 | unsigned int | |
1111 | adrp_sh_offset() const | |
1112 | { return this->adrp_sh_offset_; } | |
1113 | ||
1114 | private: | |
1115 | // Section offset of "adrp". (We do not need a "adrp_shndx_" field, because we | |
de194d85 | 1116 | // can obtain it from its parent.) |
0ef3814f HS |
1117 | const unsigned int adrp_sh_offset_; |
1118 | }; | |
1119 | ||
1120 | ||
5d7908e0 CC |
1121 | template<int size, bool big_endian> |
1122 | const int Erratum_stub<size, big_endian>::STUB_ADDR_ALIGN = 4; | |
a48d0c12 HS |
1123 | |
1124 | // Comparator used in set definition. | |
1125 | template<int size, bool big_endian> | |
1126 | struct Erratum_stub_less | |
1127 | { | |
1128 | bool | |
1129 | operator()(const Erratum_stub<size, big_endian>* s1, | |
1130 | const Erratum_stub<size, big_endian>* s2) const | |
1131 | { return *s1 < *s2; } | |
1132 | }; | |
1133 | ||
1134 | // Erratum_stub implementation for writing stub to output file. | |
1135 | ||
1136 | template<int size, bool big_endian> | |
1137 | void | |
1138 | Erratum_stub<size, big_endian>::do_write(unsigned char* view, section_size_type) | |
1139 | { | |
1140 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
1141 | const Insntype* insns = this->insns(); | |
1142 | uint32_t num_insns = this->insn_num(); | |
1143 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
2f0c79aa HS |
1144 | // For current implemented erratum 843419 and 835769, the first insn in the |
1145 | // stub is always a copy of the problematic insn (in 843419, the mem access | |
1146 | // insn, in 835769, the mac insn), followed by a jump-back. | |
a48d0c12 HS |
1147 | elfcpp::Swap<32, big_endian>::writeval(ip, this->erratum_insn()); |
1148 | for (uint32_t i = 1; i < num_insns; ++i) | |
1149 | elfcpp::Swap<32, big_endian>::writeval(ip + i, insns[i]); | |
1150 | } | |
1151 | ||
1152 | ||
1153 | // Reloc stub class. | |
1154 | ||
1155 | template<int size, bool big_endian> | |
1156 | class Reloc_stub : public Stub_base<size, big_endian> | |
1157 | { | |
1158 | public: | |
1159 | typedef Reloc_stub<size, big_endian> This; | |
1160 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
1161 | ||
1162 | // Branch range. This is used to calculate the section group size, as well as | |
1163 | // determine whether a stub is needed. | |
1164 | static const int MAX_BRANCH_OFFSET = ((1 << 25) - 1) << 2; | |
1165 | static const int MIN_BRANCH_OFFSET = -((1 << 25) << 2); | |
1166 | ||
1167 | // Constant used to determine if an offset fits in the adrp instruction | |
1168 | // encoding. | |
1169 | static const int MAX_ADRP_IMM = (1 << 20) - 1; | |
1170 | static const int MIN_ADRP_IMM = -(1 << 20); | |
1171 | ||
1172 | static const int BYTES_PER_INSN = 4; | |
5d7908e0 | 1173 | static const int STUB_ADDR_ALIGN; |
a48d0c12 HS |
1174 | |
1175 | // Determine whether the offset fits in the jump/branch instruction. | |
1176 | static bool | |
1177 | aarch64_valid_branch_offset_p(int64_t offset) | |
1178 | { return offset >= MIN_BRANCH_OFFSET && offset <= MAX_BRANCH_OFFSET; } | |
1179 | ||
1180 | // Determine whether the offset fits in the adrp immediate field. | |
1181 | static bool | |
1182 | aarch64_valid_for_adrp_p(AArch64_address location, AArch64_address dest) | |
1183 | { | |
1184 | typedef AArch64_relocate_functions<size, big_endian> Reloc; | |
1185 | int64_t adrp_imm = (Reloc::Page(dest) - Reloc::Page(location)) >> 12; | |
1186 | return adrp_imm >= MIN_ADRP_IMM && adrp_imm <= MAX_ADRP_IMM; | |
1187 | } | |
1188 | ||
1189 | // Determine the stub type for a certain relocation or ST_NONE, if no stub is | |
1190 | // needed. | |
1191 | static int | |
1192 | stub_type_for_reloc(unsigned int r_type, AArch64_address address, | |
1193 | AArch64_address target); | |
1194 | ||
1195 | Reloc_stub(int type) | |
1196 | : Stub_base<size, big_endian>(type) | |
1197 | { } | |
1198 | ||
1199 | ~Reloc_stub() | |
1200 | { } | |
1201 | ||
83a01957 HS |
1202 | // The key class used to index the stub instance in the stub table's stub map. |
1203 | class Key | |
1204 | { | |
1205 | public: | |
a48d0c12 | 1206 | Key(int type, const Symbol* symbol, const Relobj* relobj, |
83a01957 | 1207 | unsigned int r_sym, int32_t addend) |
a48d0c12 | 1208 | : type_(type), addend_(addend) |
83a01957 HS |
1209 | { |
1210 | if (symbol != NULL) | |
1211 | { | |
1212 | this->r_sym_ = Reloc_stub::invalid_index; | |
1213 | this->u_.symbol = symbol; | |
1214 | } | |
1215 | else | |
1216 | { | |
1217 | gold_assert(relobj != NULL && r_sym != invalid_index); | |
1218 | this->r_sym_ = r_sym; | |
1219 | this->u_.relobj = relobj; | |
1220 | } | |
1221 | } | |
1222 | ||
1223 | ~Key() | |
1224 | { } | |
1225 | ||
1226 | // Return stub type. | |
a48d0c12 HS |
1227 | int |
1228 | type() const | |
1229 | { return this->type_; } | |
83a01957 HS |
1230 | |
1231 | // Return the local symbol index or invalid_index. | |
1232 | unsigned int | |
1233 | r_sym() const | |
1234 | { return this->r_sym_; } | |
1235 | ||
1236 | // Return the symbol if there is one. | |
1237 | const Symbol* | |
1238 | symbol() const | |
1239 | { return this->r_sym_ == invalid_index ? this->u_.symbol : NULL; } | |
1240 | ||
1241 | // Return the relobj if there is one. | |
1242 | const Relobj* | |
1243 | relobj() const | |
1244 | { return this->r_sym_ != invalid_index ? this->u_.relobj : NULL; } | |
1245 | ||
1246 | // Whether this equals to another key k. | |
1247 | bool | |
1248 | eq(const Key& k) const | |
1249 | { | |
a48d0c12 | 1250 | return ((this->type_ == k.type_) |
83a01957 HS |
1251 | && (this->r_sym_ == k.r_sym_) |
1252 | && ((this->r_sym_ != Reloc_stub::invalid_index) | |
1253 | ? (this->u_.relobj == k.u_.relobj) | |
1254 | : (this->u_.symbol == k.u_.symbol)) | |
1255 | && (this->addend_ == k.addend_)); | |
1256 | } | |
1257 | ||
1258 | // Return a hash value. | |
1259 | size_t | |
1260 | hash_value() const | |
1261 | { | |
1262 | size_t name_hash_value = gold::string_hash<char>( | |
1263 | (this->r_sym_ != Reloc_stub::invalid_index) | |
1264 | ? this->u_.relobj->name().c_str() | |
1265 | : this->u_.symbol->name()); | |
1266 | // We only have 4 stub types. | |
a48d0c12 | 1267 | size_t stub_type_hash_value = 0x03 & this->type_; |
83a01957 HS |
1268 | return (name_hash_value |
1269 | ^ stub_type_hash_value | |
1270 | ^ ((this->r_sym_ & 0x3fff) << 2) | |
1271 | ^ ((this->addend_ & 0xffff) << 16)); | |
1272 | } | |
1273 | ||
1274 | // Functors for STL associative containers. | |
1275 | struct hash | |
1276 | { | |
1277 | size_t | |
1278 | operator()(const Key& k) const | |
1279 | { return k.hash_value(); } | |
1280 | }; | |
1281 | ||
1282 | struct equal_to | |
1283 | { | |
1284 | bool | |
1285 | operator()(const Key& k1, const Key& k2) const | |
1286 | { return k1.eq(k2); } | |
1287 | }; | |
1288 | ||
9726c3c1 | 1289 | private: |
83a01957 | 1290 | // Stub type. |
a48d0c12 | 1291 | const int type_; |
83a01957 HS |
1292 | // If this is a local symbol, this is the index in the defining object. |
1293 | // Otherwise, it is invalid_index for a global symbol. | |
1294 | unsigned int r_sym_; | |
1295 | // If r_sym_ is an invalid index, this points to a global symbol. | |
1296 | // Otherwise, it points to a relobj. We used the unsized and target | |
1297 | // independent Symbol and Relobj classes instead of Sized_symbol<32> and | |
1298 | // Arm_relobj, in order to avoid making the stub class a template | |
1299 | // as most of the stub machinery is endianness-neutral. However, it | |
1300 | // may require a bit of casting done by users of this class. | |
1301 | union | |
1302 | { | |
1303 | const Symbol* symbol; | |
1304 | const Relobj* relobj; | |
1305 | } u_; | |
1306 | // Addend associated with a reloc. | |
1307 | int32_t addend_; | |
1308 | }; // End of inner class Reloc_stub::Key | |
1309 | ||
1310 | protected: | |
1311 | // This may be overridden in the child class. | |
1312 | virtual void | |
1313 | do_write(unsigned char*, section_size_type); | |
1314 | ||
1315 | private: | |
83a01957 | 1316 | static const unsigned int invalid_index = static_cast<unsigned int>(-1); |
83a01957 HS |
1317 | }; // End of Reloc_stub |
1318 | ||
5d7908e0 CC |
1319 | template<int size, bool big_endian> |
1320 | const int Reloc_stub<size, big_endian>::STUB_ADDR_ALIGN = 4; | |
83a01957 HS |
1321 | |
1322 | // Write data to output file. | |
1323 | ||
1324 | template<int size, bool big_endian> | |
1325 | void | |
1326 | Reloc_stub<size, big_endian>:: | |
1327 | do_write(unsigned char* view, section_size_type) | |
1328 | { | |
1329 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
a48d0c12 HS |
1330 | const uint32_t* insns = this->insns(); |
1331 | uint32_t num_insns = this->insn_num(); | |
83a01957 | 1332 | Insntype* ip = reinterpret_cast<Insntype*>(view); |
a48d0c12 HS |
1333 | for (uint32_t i = 0; i < num_insns; ++i) |
1334 | elfcpp::Swap<32, big_endian>::writeval(ip + i, insns[i]); | |
83a01957 HS |
1335 | } |
1336 | ||
1337 | ||
83a01957 HS |
1338 | // Determine the stub type for a certain relocation or ST_NONE, if no stub is |
1339 | // needed. | |
1340 | ||
1341 | template<int size, bool big_endian> | |
a48d0c12 | 1342 | inline int |
83a01957 HS |
1343 | Reloc_stub<size, big_endian>::stub_type_for_reloc( |
1344 | unsigned int r_type, AArch64_address location, AArch64_address dest) | |
1345 | { | |
1346 | int64_t branch_offset = 0; | |
1347 | switch(r_type) | |
1348 | { | |
1349 | case elfcpp::R_AARCH64_CALL26: | |
1350 | case elfcpp::R_AARCH64_JUMP26: | |
1351 | branch_offset = dest - location; | |
1352 | break; | |
1353 | default: | |
9726c3c1 | 1354 | gold_unreachable(); |
83a01957 HS |
1355 | } |
1356 | ||
1357 | if (aarch64_valid_branch_offset_p(branch_offset)) | |
1358 | return ST_NONE; | |
1359 | ||
1360 | if (aarch64_valid_for_adrp_p(location, dest)) | |
1361 | return ST_ADRP_BRANCH; | |
1362 | ||
9a472eda HS |
1363 | // Always use PC-relative addressing in case of -shared or -pie. |
1364 | if (parameters->options().output_is_position_independent()) | |
83a01957 HS |
1365 | return ST_LONG_BRANCH_PCREL; |
1366 | ||
9a472eda HS |
1367 | // This saves 2 insns per stub, compared to ST_LONG_BRANCH_PCREL. |
1368 | // But is only applicable to non-shared or non-pie. | |
83a01957 HS |
1369 | return ST_LONG_BRANCH_ABS; |
1370 | } | |
1371 | ||
df2f63a6 HS |
1372 | // A class to hold stubs for the ARM target. This contains 2 different types of |
1373 | // stubs - reloc stubs and erratum stubs. | |
83a01957 HS |
1374 | |
1375 | template<int size, bool big_endian> | |
1376 | class Stub_table : public Output_data | |
1377 | { | |
1378 | public: | |
1379 | typedef Target_aarch64<size, big_endian> The_target_aarch64; | |
1380 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
a48d0c12 | 1381 | typedef AArch64_relobj<size, big_endian> The_aarch64_relobj; |
83a01957 HS |
1382 | typedef AArch64_input_section<size, big_endian> The_aarch64_input_section; |
1383 | typedef Reloc_stub<size, big_endian> The_reloc_stub; | |
1384 | typedef typename The_reloc_stub::Key The_reloc_stub_key; | |
a48d0c12 HS |
1385 | typedef Erratum_stub<size, big_endian> The_erratum_stub; |
1386 | typedef Erratum_stub_less<size, big_endian> The_erratum_stub_less; | |
83a01957 HS |
1387 | typedef typename The_reloc_stub_key::hash The_reloc_stub_key_hash; |
1388 | typedef typename The_reloc_stub_key::equal_to The_reloc_stub_key_equal_to; | |
1389 | typedef Stub_table<size, big_endian> The_stub_table; | |
1390 | typedef Unordered_map<The_reloc_stub_key, The_reloc_stub*, | |
1391 | The_reloc_stub_key_hash, The_reloc_stub_key_equal_to> | |
1392 | Reloc_stub_map; | |
1393 | typedef typename Reloc_stub_map::const_iterator Reloc_stub_map_const_iter; | |
1394 | typedef Relocate_info<size, big_endian> The_relocate_info; | |
1395 | ||
a48d0c12 HS |
1396 | typedef std::set<The_erratum_stub*, The_erratum_stub_less> Erratum_stub_set; |
1397 | typedef typename Erratum_stub_set::iterator Erratum_stub_set_iter; | |
1398 | ||
83a01957 | 1399 | Stub_table(The_aarch64_input_section* owner) |
a48d0c12 HS |
1400 | : Output_data(), owner_(owner), reloc_stubs_size_(0), |
1401 | erratum_stubs_size_(0), prev_data_size_(0) | |
83a01957 HS |
1402 | { } |
1403 | ||
1404 | ~Stub_table() | |
1405 | { } | |
1406 | ||
1407 | The_aarch64_input_section* | |
1408 | owner() const | |
1409 | { return owner_; } | |
1410 | ||
1411 | // Whether this stub table is empty. | |
1412 | bool | |
1413 | empty() const | |
a48d0c12 | 1414 | { return reloc_stubs_.empty() && erratum_stubs_.empty(); } |
83a01957 HS |
1415 | |
1416 | // Return the current data size. | |
1417 | off_t | |
1418 | current_data_size() const | |
1419 | { return this->current_data_size_for_child(); } | |
1420 | ||
1421 | // Add a STUB using KEY. The caller is responsible for avoiding addition | |
1422 | // if a STUB with the same key has already been added. | |
1423 | void | |
1424 | add_reloc_stub(The_reloc_stub* stub, const The_reloc_stub_key& key); | |
1425 | ||
a48d0c12 HS |
1426 | // Add an erratum stub into the erratum stub set. The set is ordered by |
1427 | // (relobj, shndx, sh_offset). | |
1428 | void | |
1429 | add_erratum_stub(The_erratum_stub* stub); | |
1430 | ||
1431 | // Find if such erratum exists for any given (obj, shndx, sh_offset). | |
1432 | The_erratum_stub* | |
1433 | find_erratum_stub(The_aarch64_relobj* a64relobj, | |
1434 | unsigned int shndx, unsigned int sh_offset); | |
1435 | ||
1436 | // Find all the erratums for a given input section. The return value is a pair | |
1437 | // of iterators [begin, end). | |
1438 | std::pair<Erratum_stub_set_iter, Erratum_stub_set_iter> | |
1439 | find_erratum_stubs_for_input_section(The_aarch64_relobj* a64relobj, | |
1440 | unsigned int shndx); | |
1441 | ||
1442 | // Compute the erratum stub address. | |
1443 | AArch64_address | |
1444 | erratum_stub_address(The_erratum_stub* stub) const | |
1445 | { | |
1446 | AArch64_address r = align_address(this->address() + this->reloc_stubs_size_, | |
1447 | The_erratum_stub::STUB_ADDR_ALIGN); | |
1448 | r += stub->offset(); | |
1449 | return r; | |
1450 | } | |
1451 | ||
83a01957 HS |
1452 | // Finalize stubs. No-op here, just for completeness. |
1453 | void | |
1454 | finalize_stubs() | |
1455 | { } | |
1456 | ||
1457 | // Look up a relocation stub using KEY. Return NULL if there is none. | |
1458 | The_reloc_stub* | |
1459 | find_reloc_stub(The_reloc_stub_key& key) | |
1460 | { | |
1461 | Reloc_stub_map_const_iter p = this->reloc_stubs_.find(key); | |
1462 | return (p != this->reloc_stubs_.end()) ? p->second : NULL; | |
1463 | } | |
1464 | ||
df2f63a6 | 1465 | // Relocate reloc stubs in this stub table. This does not relocate erratum stubs. |
83a01957 | 1466 | void |
df2f63a6 HS |
1467 | relocate_reloc_stubs(const The_relocate_info*, |
1468 | The_target_aarch64*, | |
1469 | Output_section*, | |
1470 | unsigned char*, | |
1471 | AArch64_address, | |
1472 | section_size_type); | |
1473 | ||
1474 | // Relocate an erratum stub. | |
1475 | void | |
1476 | relocate_erratum_stub(The_erratum_stub*, unsigned char*); | |
83a01957 HS |
1477 | |
1478 | // Update data size at the end of a relaxation pass. Return true if data size | |
1479 | // is different from that of the previous relaxation pass. | |
1480 | bool | |
1481 | update_data_size_changed_p() | |
1482 | { | |
1483 | // No addralign changed here. | |
a48d0c12 HS |
1484 | off_t s = align_address(this->reloc_stubs_size_, |
1485 | The_erratum_stub::STUB_ADDR_ALIGN) | |
1486 | + this->erratum_stubs_size_; | |
83a01957 HS |
1487 | bool changed = (s != this->prev_data_size_); |
1488 | this->prev_data_size_ = s; | |
1489 | return changed; | |
1490 | } | |
1491 | ||
1492 | protected: | |
1493 | // Write out section contents. | |
1494 | void | |
1495 | do_write(Output_file*); | |
1496 | ||
1497 | // Return the required alignment. | |
1498 | uint64_t | |
1499 | do_addralign() const | |
a48d0c12 HS |
1500 | { |
1501 | return std::max(The_reloc_stub::STUB_ADDR_ALIGN, | |
1502 | The_erratum_stub::STUB_ADDR_ALIGN); | |
1503 | } | |
83a01957 HS |
1504 | |
1505 | // Reset address and file offset. | |
1506 | void | |
1507 | do_reset_address_and_file_offset() | |
1508 | { this->set_current_data_size_for_child(this->prev_data_size_); } | |
1509 | ||
1510 | // Set final data size. | |
1511 | void | |
1512 | set_final_data_size() | |
1513 | { this->set_data_size(this->current_data_size()); } | |
1514 | ||
1515 | private: | |
df2f63a6 | 1516 | // Relocate one reloc stub. |
83a01957 | 1517 | void |
df2f63a6 HS |
1518 | relocate_reloc_stub(The_reloc_stub*, |
1519 | const The_relocate_info*, | |
1520 | The_target_aarch64*, | |
1521 | Output_section*, | |
1522 | unsigned char*, | |
1523 | AArch64_address, | |
1524 | section_size_type); | |
83a01957 HS |
1525 | |
1526 | private: | |
1527 | // Owner of this stub table. | |
1528 | The_aarch64_input_section* owner_; | |
1529 | // The relocation stubs. | |
1530 | Reloc_stub_map reloc_stubs_; | |
a48d0c12 HS |
1531 | // The erratum stubs. |
1532 | Erratum_stub_set erratum_stubs_; | |
83a01957 HS |
1533 | // Size of reloc stubs. |
1534 | off_t reloc_stubs_size_; | |
a48d0c12 HS |
1535 | // Size of erratum stubs. |
1536 | off_t erratum_stubs_size_; | |
83a01957 HS |
1537 | // data size of this in the previous pass. |
1538 | off_t prev_data_size_; | |
1539 | }; // End of Stub_table | |
1540 | ||
1541 | ||
a48d0c12 HS |
1542 | // Add an erratum stub into the erratum stub set. The set is ordered by |
1543 | // (relobj, shndx, sh_offset). | |
1544 | ||
1545 | template<int size, bool big_endian> | |
1546 | void | |
1547 | Stub_table<size, big_endian>::add_erratum_stub(The_erratum_stub* stub) | |
1548 | { | |
1549 | std::pair<Erratum_stub_set_iter, bool> ret = | |
1550 | this->erratum_stubs_.insert(stub); | |
1551 | gold_assert(ret.second); | |
1552 | this->erratum_stubs_size_ = align_address( | |
1553 | this->erratum_stubs_size_, The_erratum_stub::STUB_ADDR_ALIGN); | |
1554 | stub->set_offset(this->erratum_stubs_size_); | |
1555 | this->erratum_stubs_size_ += stub->stub_size(); | |
1556 | } | |
1557 | ||
1558 | ||
56b06706 | 1559 | // Find if such erratum exists for given (obj, shndx, sh_offset). |
a48d0c12 HS |
1560 | |
1561 | template<int size, bool big_endian> | |
1562 | Erratum_stub<size, big_endian>* | |
1563 | Stub_table<size, big_endian>::find_erratum_stub( | |
1564 | The_aarch64_relobj* a64relobj, unsigned int shndx, unsigned int sh_offset) | |
1565 | { | |
1566 | // A dummy object used as key to search in the set. | |
1567 | The_erratum_stub key(a64relobj, ST_NONE, | |
1568 | shndx, sh_offset); | |
1569 | Erratum_stub_set_iter i = this->erratum_stubs_.find(&key); | |
1570 | if (i != this->erratum_stubs_.end()) | |
1571 | { | |
1572 | The_erratum_stub* stub(*i); | |
1573 | gold_assert(stub->erratum_insn() != 0); | |
1574 | return stub; | |
1575 | } | |
1576 | return NULL; | |
1577 | } | |
1578 | ||
1579 | ||
1580 | // Find all the errata for a given input section. The return value is a pair of | |
1581 | // iterators [begin, end). | |
1582 | ||
1583 | template<int size, bool big_endian> | |
1584 | std::pair<typename Stub_table<size, big_endian>::Erratum_stub_set_iter, | |
1585 | typename Stub_table<size, big_endian>::Erratum_stub_set_iter> | |
1586 | Stub_table<size, big_endian>::find_erratum_stubs_for_input_section( | |
1587 | The_aarch64_relobj* a64relobj, unsigned int shndx) | |
1588 | { | |
1589 | typedef std::pair<Erratum_stub_set_iter, Erratum_stub_set_iter> Result_pair; | |
1590 | Erratum_stub_set_iter start, end; | |
1591 | The_erratum_stub low_key(a64relobj, ST_NONE, shndx, 0); | |
1592 | start = this->erratum_stubs_.lower_bound(&low_key); | |
1593 | if (start == this->erratum_stubs_.end()) | |
1594 | return Result_pair(this->erratum_stubs_.end(), | |
1595 | this->erratum_stubs_.end()); | |
1596 | end = start; | |
1597 | while (end != this->erratum_stubs_.end() && | |
1598 | (*end)->relobj() == a64relobj && (*end)->shndx() == shndx) | |
1599 | ++end; | |
1600 | return Result_pair(start, end); | |
1601 | } | |
1602 | ||
1603 | ||
83a01957 HS |
1604 | // Add a STUB using KEY. The caller is responsible for avoiding addition |
1605 | // if a STUB with the same key has already been added. | |
1606 | ||
1607 | template<int size, bool big_endian> | |
1608 | void | |
1609 | Stub_table<size, big_endian>::add_reloc_stub( | |
1610 | The_reloc_stub* stub, const The_reloc_stub_key& key) | |
1611 | { | |
a48d0c12 | 1612 | gold_assert(stub->type() == key.type()); |
83a01957 HS |
1613 | this->reloc_stubs_[key] = stub; |
1614 | ||
1615 | // Assign stub offset early. We can do this because we never remove | |
1616 | // reloc stubs and they are in the beginning of the stub table. | |
1617 | this->reloc_stubs_size_ = align_address(this->reloc_stubs_size_, | |
1618 | The_reloc_stub::STUB_ADDR_ALIGN); | |
1619 | stub->set_offset(this->reloc_stubs_size_); | |
1620 | this->reloc_stubs_size_ += stub->stub_size(); | |
1621 | } | |
1622 | ||
1623 | ||
df2f63a6 | 1624 | // Relocate an erratum stub. |
83a01957 HS |
1625 | |
1626 | template<int size, bool big_endian> | |
1627 | void | |
1628 | Stub_table<size, big_endian>:: | |
df2f63a6 HS |
1629 | relocate_erratum_stub(The_erratum_stub* estub, |
1630 | unsigned char* view) | |
83a01957 | 1631 | { |
a48d0c12 HS |
1632 | // Just for convenience. |
1633 | const int BPI = AArch64_insn_utilities<big_endian>::BYTES_PER_INSN; | |
1634 | ||
df2f63a6 HS |
1635 | gold_assert(!estub->is_invalidated_erratum_stub()); |
1636 | AArch64_address stub_address = this->erratum_stub_address(estub); | |
1637 | // The address of "b" in the stub that is to be "relocated". | |
1638 | AArch64_address stub_b_insn_address; | |
1639 | // Branch offset that is to be filled in "b" insn. | |
1640 | int b_offset = 0; | |
1641 | switch (estub->type()) | |
a48d0c12 | 1642 | { |
df2f63a6 HS |
1643 | case ST_E_843419: |
1644 | case ST_E_835769: | |
1645 | // The 1st insn of the erratum could be a relocation spot, | |
1646 | // in this case we need to fix it with | |
1647 | // "(*i)->erratum_insn()". | |
1648 | elfcpp::Swap<32, big_endian>::writeval( | |
1649 | view + (stub_address - this->address()), | |
1650 | estub->erratum_insn()); | |
1651 | // For the erratum, the 2nd insn is a b-insn to be patched | |
1652 | // (relocated). | |
1653 | stub_b_insn_address = stub_address + 1 * BPI; | |
1654 | b_offset = estub->destination_address() - stub_b_insn_address; | |
1655 | AArch64_relocate_functions<size, big_endian>::construct_b( | |
1656 | view + (stub_b_insn_address - this->address()), | |
1657 | ((unsigned int)(b_offset)) & 0xfffffff); | |
1658 | break; | |
1659 | default: | |
1660 | gold_unreachable(); | |
1661 | break; | |
a48d0c12 | 1662 | } |
df2f63a6 | 1663 | estub->invalidate_erratum_stub(); |
83a01957 HS |
1664 | } |
1665 | ||
1666 | ||
df2f63a6 HS |
1667 | // Relocate only reloc stubs in this stub table. This does not relocate erratum |
1668 | // stubs. | |
83a01957 HS |
1669 | |
1670 | template<int size, bool big_endian> | |
1671 | void | |
1672 | Stub_table<size, big_endian>:: | |
df2f63a6 HS |
1673 | relocate_reloc_stubs(const The_relocate_info* relinfo, |
1674 | The_target_aarch64* target_aarch64, | |
1675 | Output_section* output_section, | |
1676 | unsigned char* view, | |
1677 | AArch64_address address, | |
1678 | section_size_type view_size) | |
1679 | { | |
1680 | // "view_size" is the total size of the stub_table. | |
1681 | gold_assert(address == this->address() && | |
1682 | view_size == static_cast<section_size_type>(this->data_size())); | |
1683 | for(Reloc_stub_map_const_iter p = this->reloc_stubs_.begin(); | |
1684 | p != this->reloc_stubs_.end(); ++p) | |
1685 | relocate_reloc_stub(p->second, relinfo, target_aarch64, output_section, | |
1686 | view, address, view_size); | |
1687 | } | |
1688 | ||
1689 | ||
1690 | // Relocate one reloc stub. This is a helper for | |
1691 | // Stub_table::relocate_reloc_stubs(). | |
1692 | ||
1693 | template<int size, bool big_endian> | |
1694 | void | |
1695 | Stub_table<size, big_endian>:: | |
1696 | relocate_reloc_stub(The_reloc_stub* stub, | |
1697 | const The_relocate_info* relinfo, | |
1698 | The_target_aarch64* target_aarch64, | |
1699 | Output_section* output_section, | |
1700 | unsigned char* view, | |
1701 | AArch64_address address, | |
1702 | section_size_type view_size) | |
83a01957 HS |
1703 | { |
1704 | // "offset" is the offset from the beginning of the stub_table. | |
1705 | section_size_type offset = stub->offset(); | |
1706 | section_size_type stub_size = stub->stub_size(); | |
1707 | // "view_size" is the total size of the stub_table. | |
1708 | gold_assert(offset + stub_size <= view_size); | |
1709 | ||
df2f63a6 HS |
1710 | target_aarch64->relocate_reloc_stub(stub, relinfo, output_section, |
1711 | view + offset, address + offset, view_size); | |
83a01957 HS |
1712 | } |
1713 | ||
1714 | ||
1715 | // Write out the stubs to file. | |
1716 | ||
1717 | template<int size, bool big_endian> | |
1718 | void | |
1719 | Stub_table<size, big_endian>::do_write(Output_file* of) | |
1720 | { | |
1721 | off_t offset = this->offset(); | |
1722 | const section_size_type oview_size = | |
1723 | convert_to_section_size_type(this->data_size()); | |
1724 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
1725 | ||
1726 | // Write relocation stubs. | |
1727 | for (typename Reloc_stub_map::const_iterator p = this->reloc_stubs_.begin(); | |
1728 | p != this->reloc_stubs_.end(); ++p) | |
1729 | { | |
1730 | The_reloc_stub* stub = p->second; | |
1731 | AArch64_address address = this->address() + stub->offset(); | |
1732 | gold_assert(address == | |
1733 | align_address(address, The_reloc_stub::STUB_ADDR_ALIGN)); | |
1734 | stub->write(oview + stub->offset(), stub->stub_size()); | |
1735 | } | |
1736 | ||
a48d0c12 HS |
1737 | // Write erratum stubs. |
1738 | unsigned int erratum_stub_start_offset = | |
1739 | align_address(this->reloc_stubs_size_, The_erratum_stub::STUB_ADDR_ALIGN); | |
1740 | for (typename Erratum_stub_set::iterator p = this->erratum_stubs_.begin(); | |
1741 | p != this->erratum_stubs_.end(); ++p) | |
1742 | { | |
1743 | The_erratum_stub* stub(*p); | |
1744 | stub->write(oview + erratum_stub_start_offset + stub->offset(), | |
1745 | stub->stub_size()); | |
1746 | } | |
1747 | ||
83a01957 HS |
1748 | of->write_output_view(this->offset(), oview_size, oview); |
1749 | } | |
1750 | ||
1751 | ||
1752 | // AArch64_relobj class. | |
1753 | ||
1754 | template<int size, bool big_endian> | |
1755 | class AArch64_relobj : public Sized_relobj_file<size, big_endian> | |
1756 | { | |
1757 | public: | |
1758 | typedef AArch64_relobj<size, big_endian> This; | |
1759 | typedef Target_aarch64<size, big_endian> The_target_aarch64; | |
1760 | typedef AArch64_input_section<size, big_endian> The_aarch64_input_section; | |
1761 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
1762 | typedef Stub_table<size, big_endian> The_stub_table; | |
a48d0c12 HS |
1763 | typedef Erratum_stub<size, big_endian> The_erratum_stub; |
1764 | typedef typename The_stub_table::Erratum_stub_set_iter Erratum_stub_set_iter; | |
83a01957 HS |
1765 | typedef std::vector<The_stub_table*> Stub_table_list; |
1766 | static const AArch64_address invalid_address = | |
1767 | static_cast<AArch64_address>(-1); | |
1768 | ||
1769 | AArch64_relobj(const std::string& name, Input_file* input_file, off_t offset, | |
1770 | const typename elfcpp::Ehdr<size, big_endian>& ehdr) | |
1771 | : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr), | |
1772 | stub_tables_() | |
1773 | { } | |
1774 | ||
1775 | ~AArch64_relobj() | |
1776 | { } | |
1777 | ||
1778 | // Return the stub table of the SHNDX-th section if there is one. | |
1779 | The_stub_table* | |
1780 | stub_table(unsigned int shndx) const | |
1781 | { | |
1782 | gold_assert(shndx < this->stub_tables_.size()); | |
1783 | return this->stub_tables_[shndx]; | |
1784 | } | |
1785 | ||
1786 | // Set STUB_TABLE to be the stub_table of the SHNDX-th section. | |
1787 | void | |
1788 | set_stub_table(unsigned int shndx, The_stub_table* stub_table) | |
1789 | { | |
1790 | gold_assert(shndx < this->stub_tables_.size()); | |
1791 | this->stub_tables_[shndx] = stub_table; | |
1792 | } | |
1793 | ||
2f0c79aa | 1794 | // Entrance to errata scanning. |
5019d64a | 1795 | void |
2f0c79aa HS |
1796 | scan_errata(unsigned int shndx, |
1797 | const elfcpp::Shdr<size, big_endian>&, | |
1798 | Output_section*, const Symbol_table*, | |
1799 | The_target_aarch64*); | |
5019d64a HS |
1800 | |
1801 | // Scan all relocation sections for stub generation. | |
83a01957 HS |
1802 | void |
1803 | scan_sections_for_stubs(The_target_aarch64*, const Symbol_table*, | |
1804 | const Layout*); | |
1805 | ||
1806 | // Whether a section is a scannable text section. | |
1807 | bool | |
1808 | text_section_is_scannable(const elfcpp::Shdr<size, big_endian>&, unsigned int, | |
1809 | const Output_section*, const Symbol_table*); | |
1810 | ||
1811 | // Convert regular input section with index SHNDX to a relaxed section. | |
1812 | void | |
6bf56e74 | 1813 | convert_input_section_to_relaxed_section(unsigned shndx) |
83a01957 HS |
1814 | { |
1815 | // The stubs have relocations and we need to process them after writing | |
1816 | // out the stubs. So relocation now must follow section write. | |
6bf56e74 | 1817 | this->set_section_offset(shndx, -1ULL); |
83a01957 HS |
1818 | this->set_relocs_must_follow_section_writes(); |
1819 | } | |
1820 | ||
5019d64a HS |
1821 | // Structure for mapping symbol position. |
1822 | struct Mapping_symbol_position | |
1823 | { | |
1824 | Mapping_symbol_position(unsigned int shndx, AArch64_address offset): | |
1825 | shndx_(shndx), offset_(offset) | |
1826 | {} | |
1827 | ||
1828 | // "<" comparator used in ordered_map container. | |
1829 | bool | |
1830 | operator<(const Mapping_symbol_position& p) const | |
1831 | { | |
1832 | return (this->shndx_ < p.shndx_ | |
1833 | || (this->shndx_ == p.shndx_ && this->offset_ < p.offset_)); | |
1834 | } | |
1835 | ||
1836 | // Section index. | |
1837 | unsigned int shndx_; | |
1838 | ||
1839 | // Section offset. | |
1840 | AArch64_address offset_; | |
1841 | }; | |
1842 | ||
1843 | typedef std::map<Mapping_symbol_position, char> Mapping_symbol_info; | |
1844 | ||
83a01957 HS |
1845 | protected: |
1846 | // Post constructor setup. | |
1847 | void | |
1848 | do_setup() | |
1849 | { | |
1850 | // Call parent's setup method. | |
1851 | Sized_relobj_file<size, big_endian>::do_setup(); | |
1852 | ||
1853 | // Initialize look-up tables. | |
1854 | this->stub_tables_.resize(this->shnum()); | |
1855 | } | |
1856 | ||
1857 | virtual void | |
1858 | do_relocate_sections( | |
1859 | const Symbol_table* symtab, const Layout* layout, | |
1860 | const unsigned char* pshdrs, Output_file* of, | |
1861 | typename Sized_relobj_file<size, big_endian>::Views* pviews); | |
1862 | ||
5019d64a HS |
1863 | // Count local symbols and (optionally) record mapping info. |
1864 | virtual void | |
1865 | do_count_local_symbols(Stringpool_template<char>*, | |
1866 | Stringpool_template<char>*); | |
1867 | ||
83a01957 | 1868 | private: |
df2f63a6 HS |
1869 | // Fix all errata in the object, and for each erratum, relocate corresponding |
1870 | // erratum stub. | |
a48d0c12 | 1871 | void |
df2f63a6 HS |
1872 | fix_errata_and_relocate_erratum_stubs( |
1873 | typename Sized_relobj_file<size, big_endian>::Views* pviews); | |
a48d0c12 | 1874 | |
0ef3814f HS |
1875 | // Try to fix erratum 843419 in an optimized way. Return true if patch is |
1876 | // applied. | |
1877 | bool | |
1878 | try_fix_erratum_843419_optimized( | |
972d8a18 | 1879 | The_erratum_stub*, AArch64_address, |
0ef3814f HS |
1880 | typename Sized_relobj_file<size, big_endian>::View_size&); |
1881 | ||
83a01957 HS |
1882 | // Whether a section needs to be scanned for relocation stubs. |
1883 | bool | |
1884 | section_needs_reloc_stub_scanning(const elfcpp::Shdr<size, big_endian>&, | |
1885 | const Relobj::Output_sections&, | |
1886 | const Symbol_table*, const unsigned char*); | |
1887 | ||
1888 | // List of stub tables. | |
1889 | Stub_table_list stub_tables_; | |
5019d64a HS |
1890 | |
1891 | // Mapping symbol information sorted by (section index, section_offset). | |
1892 | Mapping_symbol_info mapping_symbol_info_; | |
83a01957 HS |
1893 | }; // End of AArch64_relobj |
1894 | ||
1895 | ||
5019d64a HS |
1896 | // Override to record mapping symbol information. |
1897 | template<int size, bool big_endian> | |
1898 | void | |
1899 | AArch64_relobj<size, big_endian>::do_count_local_symbols( | |
1900 | Stringpool_template<char>* pool, Stringpool_template<char>* dynpool) | |
1901 | { | |
1902 | Sized_relobj_file<size, big_endian>::do_count_local_symbols(pool, dynpool); | |
1903 | ||
1904 | // Only erratum-fixing work needs mapping symbols, so skip this time consuming | |
1905 | // processing if not fixing erratum. | |
2f0c79aa HS |
1906 | if (!parameters->options().fix_cortex_a53_843419() |
1907 | && !parameters->options().fix_cortex_a53_835769()) | |
5019d64a HS |
1908 | return; |
1909 | ||
1910 | const unsigned int loccount = this->local_symbol_count(); | |
1911 | if (loccount == 0) | |
1912 | return; | |
1913 | ||
1914 | // Read the symbol table section header. | |
1915 | const unsigned int symtab_shndx = this->symtab_shndx(); | |
1916 | elfcpp::Shdr<size, big_endian> | |
1917 | symtabshdr(this, this->elf_file()->section_header(symtab_shndx)); | |
1918 | gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB); | |
1919 | ||
1920 | // Read the local symbols. | |
1921 | const int sym_size =elfcpp::Elf_sizes<size>::sym_size; | |
1922 | gold_assert(loccount == symtabshdr.get_sh_info()); | |
1923 | off_t locsize = loccount * sym_size; | |
1924 | const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(), | |
1925 | locsize, true, true); | |
1926 | ||
1927 | // For mapping symbol processing, we need to read the symbol names. | |
1928 | unsigned int strtab_shndx = this->adjust_shndx(symtabshdr.get_sh_link()); | |
1929 | if (strtab_shndx >= this->shnum()) | |
1930 | { | |
1931 | this->error(_("invalid symbol table name index: %u"), strtab_shndx); | |
1932 | return; | |
1933 | } | |
1934 | ||
1935 | elfcpp::Shdr<size, big_endian> | |
1936 | strtabshdr(this, this->elf_file()->section_header(strtab_shndx)); | |
1937 | if (strtabshdr.get_sh_type() != elfcpp::SHT_STRTAB) | |
1938 | { | |
1939 | this->error(_("symbol table name section has wrong type: %u"), | |
1940 | static_cast<unsigned int>(strtabshdr.get_sh_type())); | |
1941 | return; | |
1942 | } | |
1943 | ||
1944 | const char* pnames = | |
1945 | reinterpret_cast<const char*>(this->get_view(strtabshdr.get_sh_offset(), | |
1946 | strtabshdr.get_sh_size(), | |
1947 | false, false)); | |
1948 | ||
1949 | // Skip the first dummy symbol. | |
1950 | psyms += sym_size; | |
1951 | typename Sized_relobj_file<size, big_endian>::Local_values* | |
1952 | plocal_values = this->local_values(); | |
1953 | for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size) | |
1954 | { | |
1955 | elfcpp::Sym<size, big_endian> sym(psyms); | |
1956 | Symbol_value<size>& lv((*plocal_values)[i]); | |
1957 | AArch64_address input_value = lv.input_value(); | |
1958 | ||
b91deca9 HS |
1959 | // Check to see if this is a mapping symbol. AArch64 mapping symbols are |
1960 | // defined in "ELF for the ARM 64-bit Architecture", Table 4-4, Mapping | |
1961 | // symbols. | |
1962 | // Mapping symbols could be one of the following 4 forms - | |
1963 | // a) $x | |
1964 | // b) $x.<any...> | |
1965 | // c) $d | |
1966 | // d) $d.<any...> | |
5019d64a HS |
1967 | const char* sym_name = pnames + sym.get_st_name(); |
1968 | if (sym_name[0] == '$' && (sym_name[1] == 'x' || sym_name[1] == 'd') | |
b91deca9 | 1969 | && (sym_name[2] == '\0' || sym_name[2] == '.')) |
5019d64a HS |
1970 | { |
1971 | bool is_ordinary; | |
1972 | unsigned int input_shndx = | |
1973 | this->adjust_sym_shndx(i, sym.get_st_shndx(), &is_ordinary); | |
1974 | gold_assert(is_ordinary); | |
1975 | ||
1976 | Mapping_symbol_position msp(input_shndx, input_value); | |
1977 | // Insert mapping_symbol_info into map whose ordering is defined by | |
1978 | // (shndx, offset_within_section). | |
1979 | this->mapping_symbol_info_[msp] = sym_name[1]; | |
1980 | } | |
1981 | } | |
1982 | } | |
1983 | ||
1984 | ||
df2f63a6 HS |
1985 | // Fix all errata in the object and for each erratum, we relocate the |
1986 | // corresponding erratum stub (by calling Stub_table::relocate_erratum_stub). | |
a48d0c12 HS |
1987 | |
1988 | template<int size, bool big_endian> | |
1989 | void | |
df2f63a6 | 1990 | AArch64_relobj<size, big_endian>::fix_errata_and_relocate_erratum_stubs( |
a48d0c12 HS |
1991 | typename Sized_relobj_file<size, big_endian>::Views* pviews) |
1992 | { | |
1993 | typedef typename elfcpp::Swap<32,big_endian>::Valtype Insntype; | |
1994 | unsigned int shnum = this->shnum(); | |
972d8a18 | 1995 | const Relobj::Output_sections& out_sections(this->output_sections()); |
a48d0c12 HS |
1996 | for (unsigned int i = 1; i < shnum; ++i) |
1997 | { | |
1998 | The_stub_table* stub_table = this->stub_table(i); | |
1999 | if (!stub_table) | |
2000 | continue; | |
2001 | std::pair<Erratum_stub_set_iter, Erratum_stub_set_iter> | |
2002 | ipair(stub_table->find_erratum_stubs_for_input_section(this, i)); | |
2003 | Erratum_stub_set_iter p = ipair.first, end = ipair.second; | |
972d8a18 HS |
2004 | typename Sized_relobj_file<size, big_endian>::View_size& |
2005 | pview((*pviews)[i]); | |
2006 | AArch64_address view_offset = 0; | |
2007 | if (pview.is_input_output_view) | |
2008 | { | |
2009 | // In this case, write_sections has not added the output offset to | |
2010 | // the view's address, so we must do so. Currently this only happens | |
2011 | // for a relaxed section. | |
2012 | unsigned int index = this->adjust_shndx(i); | |
2013 | const Output_relaxed_input_section* poris = | |
2014 | out_sections[index]->find_relaxed_input_section(this, index); | |
2015 | gold_assert(poris != NULL); | |
2016 | view_offset = poris->address() - pview.address; | |
2017 | } | |
2018 | ||
a48d0c12 HS |
2019 | while (p != end) |
2020 | { | |
2021 | The_erratum_stub* stub = *p; | |
a48d0c12 HS |
2022 | |
2023 | // Double check data before fix. | |
972d8a18 | 2024 | gold_assert(pview.address + view_offset + stub->sh_offset() |
56b06706 HS |
2025 | == stub->erratum_address()); |
2026 | ||
2027 | // Update previously recorded erratum insn with relocated | |
2028 | // version. | |
a48d0c12 | 2029 | Insntype* ip = |
972d8a18 HS |
2030 | reinterpret_cast<Insntype*>( |
2031 | pview.view + view_offset + stub->sh_offset()); | |
a48d0c12 | 2032 | Insntype insn_to_fix = ip[0]; |
56b06706 | 2033 | stub->update_erratum_insn(insn_to_fix); |
a48d0c12 | 2034 | |
0ef3814f HS |
2035 | // First try to see if erratum is 843419 and if it can be fixed |
2036 | // without using branch-to-stub. | |
972d8a18 | 2037 | if (!try_fix_erratum_843419_optimized(stub, view_offset, pview)) |
0ef3814f HS |
2038 | { |
2039 | // Replace the erratum insn with a branch-to-stub. | |
2040 | AArch64_address stub_address = | |
2041 | stub_table->erratum_stub_address(stub); | |
2042 | unsigned int b_offset = stub_address - stub->erratum_address(); | |
2043 | AArch64_relocate_functions<size, big_endian>::construct_b( | |
972d8a18 HS |
2044 | pview.view + view_offset + stub->sh_offset(), |
2045 | b_offset & 0xfffffff); | |
0ef3814f | 2046 | } |
df2f63a6 HS |
2047 | |
2048 | // Erratum fix is done (or skipped), continue to relocate erratum | |
2049 | // stub. Note, when erratum fix is skipped (either because we | |
2050 | // proactively change the code sequence or the code sequence is | |
2051 | // changed by relaxation, etc), we can still safely relocate the | |
2052 | // erratum stub, ignoring the fact the erratum could never be | |
2053 | // executed. | |
2054 | stub_table->relocate_erratum_stub( | |
972d8a18 | 2055 | stub, |
036aae79 | 2056 | pview.view + (stub_table->address() - pview.address)); |
df2f63a6 HS |
2057 | |
2058 | // Next erratum stub. | |
a48d0c12 HS |
2059 | ++p; |
2060 | } | |
2061 | } | |
2062 | } | |
2063 | ||
2064 | ||
0ef3814f HS |
2065 | // This is an optimization for 843419. This erratum requires the sequence begin |
2066 | // with 'adrp', when final value calculated by adrp fits in adr, we can just | |
2067 | // replace 'adrp' with 'adr', so we save 2 jumps per occurrence. (Note, however, | |
2068 | // in this case, we do not delete the erratum stub (too late to do so), it is | |
2069 | // merely generated without ever being called.) | |
2070 | ||
2071 | template<int size, bool big_endian> | |
2072 | bool | |
2073 | AArch64_relobj<size, big_endian>::try_fix_erratum_843419_optimized( | |
972d8a18 | 2074 | The_erratum_stub* stub, AArch64_address view_offset, |
0ef3814f HS |
2075 | typename Sized_relobj_file<size, big_endian>::View_size& pview) |
2076 | { | |
2077 | if (stub->type() != ST_E_843419) | |
2078 | return false; | |
2079 | ||
2080 | typedef AArch64_insn_utilities<big_endian> Insn_utilities; | |
2081 | typedef typename elfcpp::Swap<32,big_endian>::Valtype Insntype; | |
2082 | E843419_stub<size, big_endian>* e843419_stub = | |
2083 | reinterpret_cast<E843419_stub<size, big_endian>*>(stub); | |
972d8a18 HS |
2084 | AArch64_address pc = |
2085 | pview.address + view_offset + e843419_stub->adrp_sh_offset(); | |
37de058a | 2086 | unsigned int adrp_offset = e843419_stub->adrp_sh_offset (); |
972d8a18 HS |
2087 | Insntype* adrp_view = |
2088 | reinterpret_cast<Insntype*>(pview.view + view_offset + adrp_offset); | |
0ef3814f | 2089 | Insntype adrp_insn = adrp_view[0]; |
37de058a JW |
2090 | |
2091 | // If the instruction at adrp_sh_offset is "mrs R, tpidr_el0", it may come | |
2092 | // from IE -> LE relaxation etc. This is a side-effect of TLS relaxation that | |
2093 | // ADRP has been turned into MRS, there is no erratum risk anymore. | |
2094 | // Therefore, we return true to avoid doing unnecessary branch-to-stub. | |
2095 | if (Insn_utilities::is_mrs_tpidr_el0(adrp_insn)) | |
2096 | return true; | |
2097 | ||
2098 | // If the instruction at adrp_sh_offset is not ADRP and the instruction before | |
2099 | // it is "mrs R, tpidr_el0", it may come from LD -> LE relaxation etc. | |
2100 | // Like the above case, there is no erratum risk any more, we can safely | |
2101 | // return true. | |
2102 | if (!Insn_utilities::is_adrp(adrp_insn) && adrp_offset) | |
2103 | { | |
972d8a18 HS |
2104 | Insntype* prev_view = |
2105 | reinterpret_cast<Insntype*>( | |
2106 | pview.view + view_offset + adrp_offset - 4); | |
37de058a JW |
2107 | Insntype prev_insn = prev_view[0]; |
2108 | ||
2109 | if (Insn_utilities::is_mrs_tpidr_el0(prev_insn)) | |
2110 | return true; | |
2111 | } | |
2112 | ||
2113 | /* If we reach here, the first instruction must be ADRP. */ | |
0ef3814f HS |
2114 | gold_assert(Insn_utilities::is_adrp(adrp_insn)); |
2115 | // Get adrp 33-bit signed imm value. | |
2116 | int64_t adrp_imm = Insn_utilities:: | |
2117 | aarch64_adrp_decode_imm(adrp_insn); | |
2118 | // adrp - final value transferred to target register is calculated as: | |
2119 | // PC[11:0] = Zeros(12) | |
2120 | // adrp_dest_value = PC + adrp_imm; | |
2121 | int64_t adrp_dest_value = (pc & ~((1 << 12) - 1)) + adrp_imm; | |
2122 | // adr -final value transferred to target register is calucalted as: | |
2123 | // PC + adr_imm | |
2124 | // So we have: | |
2125 | // PC + adr_imm = adrp_dest_value | |
2126 | // ==> | |
2127 | // adr_imm = adrp_dest_value - PC | |
2128 | int64_t adr_imm = adrp_dest_value - pc; | |
2129 | // Check if imm fits in adr (21-bit signed). | |
2130 | if (-(1 << 20) <= adr_imm && adr_imm < (1 << 20)) | |
2131 | { | |
2132 | // Convert 'adrp' into 'adr'. | |
f945ba50 | 2133 | Insntype adr_insn = adrp_insn & ((1u << 31) - 1); |
0ef3814f HS |
2134 | adr_insn = Insn_utilities:: |
2135 | aarch64_adr_encode_imm(adr_insn, adr_imm); | |
2136 | elfcpp::Swap<32, big_endian>::writeval(adrp_view, adr_insn); | |
2137 | return true; | |
2138 | } | |
2139 | return false; | |
2140 | } | |
2141 | ||
2142 | ||
83a01957 HS |
2143 | // Relocate sections. |
2144 | ||
2145 | template<int size, bool big_endian> | |
2146 | void | |
2147 | AArch64_relobj<size, big_endian>::do_relocate_sections( | |
2148 | const Symbol_table* symtab, const Layout* layout, | |
2149 | const unsigned char* pshdrs, Output_file* of, | |
2150 | typename Sized_relobj_file<size, big_endian>::Views* pviews) | |
2151 | { | |
98461510 CC |
2152 | // Relocate the section data. |
2153 | this->relocate_section_range(symtab, layout, pshdrs, of, pviews, | |
2154 | 1, this->shnum() - 1); | |
83a01957 HS |
2155 | |
2156 | // We do not generate stubs if doing a relocatable link. | |
2157 | if (parameters->options().relocatable()) | |
2158 | return; | |
2159 | ||
df2f63a6 HS |
2160 | // This part only relocates erratum stubs that belong to input sections of this |
2161 | // object file. | |
2f0c79aa HS |
2162 | if (parameters->options().fix_cortex_a53_843419() |
2163 | || parameters->options().fix_cortex_a53_835769()) | |
df2f63a6 | 2164 | this->fix_errata_and_relocate_erratum_stubs(pviews); |
a48d0c12 | 2165 | |
83a01957 HS |
2166 | Relocate_info<size, big_endian> relinfo; |
2167 | relinfo.symtab = symtab; | |
2168 | relinfo.layout = layout; | |
2169 | relinfo.object = this; | |
2170 | ||
df2f63a6 HS |
2171 | // This part relocates all reloc stubs that are contained in stub_tables of |
2172 | // this object file. | |
83a01957 HS |
2173 | unsigned int shnum = this->shnum(); |
2174 | The_target_aarch64* target = The_target_aarch64::current_target(); | |
2175 | ||
2176 | for (unsigned int i = 1; i < shnum; ++i) | |
2177 | { | |
2178 | The_aarch64_input_section* aarch64_input_section = | |
2179 | target->find_aarch64_input_section(this, i); | |
2180 | if (aarch64_input_section != NULL | |
2181 | && aarch64_input_section->is_stub_table_owner() | |
2182 | && !aarch64_input_section->stub_table()->empty()) | |
2183 | { | |
2184 | Output_section* os = this->output_section(i); | |
2185 | gold_assert(os != NULL); | |
2186 | ||
2187 | relinfo.reloc_shndx = elfcpp::SHN_UNDEF; | |
2188 | relinfo.reloc_shdr = NULL; | |
2189 | relinfo.data_shndx = i; | |
2190 | relinfo.data_shdr = pshdrs + i * elfcpp::Elf_sizes<size>::shdr_size; | |
2191 | ||
2192 | typename Sized_relobj_file<size, big_endian>::View_size& | |
2193 | view_struct = (*pviews)[i]; | |
2194 | gold_assert(view_struct.view != NULL); | |
2195 | ||
2196 | The_stub_table* stub_table = aarch64_input_section->stub_table(); | |
2197 | off_t offset = stub_table->address() - view_struct.address; | |
2198 | unsigned char* view = view_struct.view + offset; | |
2199 | AArch64_address address = stub_table->address(); | |
2200 | section_size_type view_size = stub_table->data_size(); | |
df2f63a6 HS |
2201 | stub_table->relocate_reloc_stubs(&relinfo, target, os, view, address, |
2202 | view_size); | |
83a01957 HS |
2203 | } |
2204 | } | |
2205 | } | |
2206 | ||
2207 | ||
2208 | // Determine if an input section is scannable for stub processing. SHDR is | |
2209 | // the header of the section and SHNDX is the section index. OS is the output | |
2210 | // section for the input section and SYMTAB is the global symbol table used to | |
2211 | // look up ICF information. | |
2212 | ||
2213 | template<int size, bool big_endian> | |
2214 | bool | |
2215 | AArch64_relobj<size, big_endian>::text_section_is_scannable( | |
2216 | const elfcpp::Shdr<size, big_endian>& text_shdr, | |
2217 | unsigned int text_shndx, | |
2218 | const Output_section* os, | |
2219 | const Symbol_table* symtab) | |
2220 | { | |
2221 | // Skip any empty sections, unallocated sections or sections whose | |
2222 | // type are not SHT_PROGBITS. | |
2223 | if (text_shdr.get_sh_size() == 0 | |
2224 | || (text_shdr.get_sh_flags() & elfcpp::SHF_ALLOC) == 0 | |
2225 | || text_shdr.get_sh_type() != elfcpp::SHT_PROGBITS) | |
2226 | return false; | |
2227 | ||
2228 | // Skip any discarded or ICF'ed sections. | |
2229 | if (os == NULL || symtab->is_section_folded(this, text_shndx)) | |
2230 | return false; | |
2231 | ||
2232 | // Skip exception frame. | |
2233 | if (strcmp(os->name(), ".eh_frame") == 0) | |
2234 | return false ; | |
2235 | ||
2236 | gold_assert(!this->is_output_section_offset_invalid(text_shndx) || | |
2237 | os->find_relaxed_input_section(this, text_shndx) != NULL); | |
2238 | ||
2239 | return true; | |
2240 | } | |
2241 | ||
2242 | ||
2243 | // Determine if we want to scan the SHNDX-th section for relocation stubs. | |
2244 | // This is a helper for AArch64_relobj::scan_sections_for_stubs(). | |
2245 | ||
2246 | template<int size, bool big_endian> | |
2247 | bool | |
2248 | AArch64_relobj<size, big_endian>::section_needs_reloc_stub_scanning( | |
2249 | const elfcpp::Shdr<size, big_endian>& shdr, | |
2250 | const Relobj::Output_sections& out_sections, | |
2251 | const Symbol_table* symtab, | |
2252 | const unsigned char* pshdrs) | |
2253 | { | |
2254 | unsigned int sh_type = shdr.get_sh_type(); | |
2255 | if (sh_type != elfcpp::SHT_RELA) | |
2256 | return false; | |
2257 | ||
2258 | // Ignore empty section. | |
2259 | off_t sh_size = shdr.get_sh_size(); | |
2260 | if (sh_size == 0) | |
2261 | return false; | |
2262 | ||
2263 | // Ignore reloc section with unexpected symbol table. The | |
2264 | // error will be reported in the final link. | |
2265 | if (this->adjust_shndx(shdr.get_sh_link()) != this->symtab_shndx()) | |
2266 | return false; | |
2267 | ||
2268 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
2269 | unsigned int reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
2270 | ||
2271 | // Ignore reloc section with unexpected entsize or uneven size. | |
2272 | // The error will be reported in the final link. | |
2273 | if (reloc_size != shdr.get_sh_entsize() || sh_size % reloc_size != 0) | |
2274 | return false; | |
2275 | ||
2276 | // Ignore reloc section with bad info. This error will be | |
2277 | // reported in the final link. | |
2278 | unsigned int text_shndx = this->adjust_shndx(shdr.get_sh_info()); | |
2279 | if (text_shndx >= this->shnum()) | |
2280 | return false; | |
2281 | ||
2282 | const unsigned int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2283 | const elfcpp::Shdr<size, big_endian> text_shdr(pshdrs + | |
2284 | text_shndx * shdr_size); | |
2285 | return this->text_section_is_scannable(text_shdr, text_shndx, | |
2286 | out_sections[text_shndx], symtab); | |
2287 | } | |
2288 | ||
2289 | ||
2f0c79aa | 2290 | // Scan section SHNDX for erratum 843419 and 835769. |
5019d64a HS |
2291 | |
2292 | template<int size, bool big_endian> | |
2293 | void | |
2f0c79aa | 2294 | AArch64_relobj<size, big_endian>::scan_errata( |
5019d64a HS |
2295 | unsigned int shndx, const elfcpp::Shdr<size, big_endian>& shdr, |
2296 | Output_section* os, const Symbol_table* symtab, | |
2297 | The_target_aarch64* target) | |
2298 | { | |
2299 | if (shdr.get_sh_size() == 0 | |
2300 | || (shdr.get_sh_flags() & | |
2301 | (elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR)) == 0 | |
2302 | || shdr.get_sh_type() != elfcpp::SHT_PROGBITS) | |
2303 | return; | |
2304 | ||
2305 | if (!os || symtab->is_section_folded(this, shndx)) return; | |
2306 | ||
2307 | AArch64_address output_offset = this->get_output_section_offset(shndx); | |
2308 | AArch64_address output_address; | |
2309 | if (output_offset != invalid_address) | |
2310 | output_address = os->address() + output_offset; | |
2311 | else | |
2312 | { | |
2313 | const Output_relaxed_input_section* poris = | |
2314 | os->find_relaxed_input_section(this, shndx); | |
2315 | if (!poris) return; | |
2316 | output_address = poris->address(); | |
2317 | } | |
2318 | ||
fd6798fa PS |
2319 | // Update the addresses in previously generated erratum stubs. Unlike when |
2320 | // we scan relocations for stubs, if section addresses have changed due to | |
2321 | // other relaxations we are unlikely to scan the same erratum instances | |
2322 | // again. | |
2323 | The_stub_table* stub_table = this->stub_table(shndx); | |
2324 | if (stub_table) | |
2325 | { | |
2326 | std::pair<Erratum_stub_set_iter, Erratum_stub_set_iter> | |
2327 | ipair(stub_table->find_erratum_stubs_for_input_section(this, shndx)); | |
2328 | for (Erratum_stub_set_iter p = ipair.first; p != ipair.second; ++p) | |
2329 | (*p)->update_erratum_address(output_address); | |
2330 | } | |
2331 | ||
5019d64a HS |
2332 | section_size_type input_view_size = 0; |
2333 | const unsigned char* input_view = | |
2334 | this->section_contents(shndx, &input_view_size, false); | |
2335 | ||
2336 | Mapping_symbol_position section_start(shndx, 0); | |
2337 | // Find the first mapping symbol record within section shndx. | |
2338 | typename Mapping_symbol_info::const_iterator p = | |
2339 | this->mapping_symbol_info_.lower_bound(section_start); | |
5019d64a HS |
2340 | while (p != this->mapping_symbol_info_.end() && |
2341 | p->first.shndx_ == shndx) | |
2342 | { | |
2343 | typename Mapping_symbol_info::const_iterator prev = p; | |
2344 | ++p; | |
2345 | if (prev->second == 'x') | |
2346 | { | |
2347 | section_size_type span_start = | |
2348 | convert_to_section_size_type(prev->first.offset_); | |
2349 | section_size_type span_end; | |
2350 | if (p != this->mapping_symbol_info_.end() | |
2351 | && p->first.shndx_ == shndx) | |
2352 | span_end = convert_to_section_size_type(p->first.offset_); | |
2353 | else | |
2354 | span_end = convert_to_section_size_type(shdr.get_sh_size()); | |
2f0c79aa HS |
2355 | |
2356 | // Here we do not share the scanning code of both errata. For 843419, | |
2357 | // only the last few insns of each page are examined, which is fast, | |
2358 | // whereas, for 835769, every insn pair needs to be checked. | |
2359 | ||
2360 | if (parameters->options().fix_cortex_a53_843419()) | |
2361 | target->scan_erratum_843419_span( | |
2362 | this, shndx, span_start, span_end, | |
2363 | const_cast<unsigned char*>(input_view), output_address); | |
2364 | ||
2365 | if (parameters->options().fix_cortex_a53_835769()) | |
2366 | target->scan_erratum_835769_span( | |
5019d64a HS |
2367 | this, shndx, span_start, span_end, |
2368 | const_cast<unsigned char*>(input_view), output_address); | |
2369 | } | |
2370 | } | |
2371 | } | |
2372 | ||
2373 | ||
83a01957 HS |
2374 | // Scan relocations for stub generation. |
2375 | ||
2376 | template<int size, bool big_endian> | |
2377 | void | |
2378 | AArch64_relobj<size, big_endian>::scan_sections_for_stubs( | |
2379 | The_target_aarch64* target, | |
2380 | const Symbol_table* symtab, | |
2381 | const Layout* layout) | |
2382 | { | |
2383 | unsigned int shnum = this->shnum(); | |
2384 | const unsigned int shdr_size = elfcpp::Elf_sizes<size>::shdr_size; | |
2385 | ||
2386 | // Read the section headers. | |
2387 | const unsigned char* pshdrs = this->get_view(this->elf_file()->shoff(), | |
2388 | shnum * shdr_size, | |
2389 | true, true); | |
2390 | ||
2391 | // To speed up processing, we set up hash tables for fast lookup of | |
2392 | // input offsets to output addresses. | |
2393 | this->initialize_input_to_output_maps(); | |
2394 | ||
2395 | const Relobj::Output_sections& out_sections(this->output_sections()); | |
2396 | ||
2397 | Relocate_info<size, big_endian> relinfo; | |
2398 | relinfo.symtab = symtab; | |
2399 | relinfo.layout = layout; | |
2400 | relinfo.object = this; | |
2401 | ||
2402 | // Do relocation stubs scanning. | |
2403 | const unsigned char* p = pshdrs + shdr_size; | |
2404 | for (unsigned int i = 1; i < shnum; ++i, p += shdr_size) | |
2405 | { | |
2406 | const elfcpp::Shdr<size, big_endian> shdr(p); | |
2f0c79aa HS |
2407 | if (parameters->options().fix_cortex_a53_843419() |
2408 | || parameters->options().fix_cortex_a53_835769()) | |
2409 | scan_errata(i, shdr, out_sections[i], symtab, target); | |
83a01957 HS |
2410 | if (this->section_needs_reloc_stub_scanning(shdr, out_sections, symtab, |
2411 | pshdrs)) | |
2412 | { | |
2413 | unsigned int index = this->adjust_shndx(shdr.get_sh_info()); | |
2414 | AArch64_address output_offset = | |
2415 | this->get_output_section_offset(index); | |
2416 | AArch64_address output_address; | |
2417 | if (output_offset != invalid_address) | |
2418 | { | |
2419 | output_address = out_sections[index]->address() + output_offset; | |
2420 | } | |
2421 | else | |
2422 | { | |
2423 | // Currently this only happens for a relaxed section. | |
2424 | const Output_relaxed_input_section* poris = | |
2425 | out_sections[index]->find_relaxed_input_section(this, index); | |
2426 | gold_assert(poris != NULL); | |
2427 | output_address = poris->address(); | |
2428 | } | |
2429 | ||
2430 | // Get the relocations. | |
2431 | const unsigned char* prelocs = this->get_view(shdr.get_sh_offset(), | |
2432 | shdr.get_sh_size(), | |
2433 | true, false); | |
2434 | ||
2435 | // Get the section contents. | |
2436 | section_size_type input_view_size = 0; | |
2437 | const unsigned char* input_view = | |
2438 | this->section_contents(index, &input_view_size, false); | |
2439 | ||
2440 | relinfo.reloc_shndx = i; | |
2441 | relinfo.data_shndx = index; | |
2442 | unsigned int sh_type = shdr.get_sh_type(); | |
2443 | unsigned int reloc_size; | |
2444 | gold_assert (sh_type == elfcpp::SHT_RELA); | |
2445 | reloc_size = elfcpp::Elf_sizes<size>::rela_size; | |
2446 | ||
2447 | Output_section* os = out_sections[index]; | |
2448 | target->scan_section_for_stubs(&relinfo, sh_type, prelocs, | |
2449 | shdr.get_sh_size() / reloc_size, | |
2450 | os, | |
2451 | output_offset == invalid_address, | |
2452 | input_view, output_address, | |
2453 | input_view_size); | |
2454 | } | |
2455 | } | |
2456 | } | |
2457 | ||
2458 | ||
2459 | // A class to wrap an ordinary input section containing executable code. | |
2460 | ||
2461 | template<int size, bool big_endian> | |
2462 | class AArch64_input_section : public Output_relaxed_input_section | |
2463 | { | |
2464 | public: | |
2465 | typedef Stub_table<size, big_endian> The_stub_table; | |
2466 | ||
2467 | AArch64_input_section(Relobj* relobj, unsigned int shndx) | |
2468 | : Output_relaxed_input_section(relobj, shndx, 1), | |
2469 | stub_table_(NULL), | |
2470 | original_contents_(NULL), original_size_(0), | |
2471 | original_addralign_(1) | |
2472 | { } | |
2473 | ||
2474 | ~AArch64_input_section() | |
2475 | { delete[] this->original_contents_; } | |
2476 | ||
2477 | // Initialize. | |
2478 | void | |
2479 | init(); | |
2480 | ||
2481 | // Set the stub_table. | |
2482 | void | |
2483 | set_stub_table(The_stub_table* st) | |
2484 | { this->stub_table_ = st; } | |
2485 | ||
2486 | // Whether this is a stub table owner. | |
2487 | bool | |
2488 | is_stub_table_owner() const | |
2489 | { return this->stub_table_ != NULL && this->stub_table_->owner() == this; } | |
2490 | ||
2491 | // Return the original size of the section. | |
2492 | uint32_t | |
2493 | original_size() const | |
2494 | { return this->original_size_; } | |
2495 | ||
2496 | // Return the stub table. | |
2497 | The_stub_table* | |
2498 | stub_table() | |
2499 | { return stub_table_; } | |
2500 | ||
2501 | protected: | |
2502 | // Write out this input section. | |
2503 | void | |
2504 | do_write(Output_file*); | |
2505 | ||
2506 | // Return required alignment of this. | |
2507 | uint64_t | |
2508 | do_addralign() const | |
2509 | { | |
2510 | if (this->is_stub_table_owner()) | |
2511 | return std::max(this->stub_table_->addralign(), | |
2512 | static_cast<uint64_t>(this->original_addralign_)); | |
2513 | else | |
2514 | return this->original_addralign_; | |
2515 | } | |
2516 | ||
2517 | // Finalize data size. | |
2518 | void | |
2519 | set_final_data_size(); | |
2520 | ||
2521 | // Reset address and file offset. | |
2522 | void | |
2523 | do_reset_address_and_file_offset(); | |
2524 | ||
2525 | // Output offset. | |
2526 | bool | |
2527 | do_output_offset(const Relobj* object, unsigned int shndx, | |
2528 | section_offset_type offset, | |
2529 | section_offset_type* poutput) const | |
2530 | { | |
2531 | if ((object == this->relobj()) | |
2532 | && (shndx == this->shndx()) | |
2533 | && (offset >= 0) | |
2534 | && (offset <= | |
2535 | convert_types<section_offset_type, uint32_t>(this->original_size_))) | |
2536 | { | |
2537 | *poutput = offset; | |
2538 | return true; | |
2539 | } | |
2540 | else | |
2541 | return false; | |
2542 | } | |
2543 | ||
2544 | private: | |
2545 | // Copying is not allowed. | |
2546 | AArch64_input_section(const AArch64_input_section&); | |
2547 | AArch64_input_section& operator=(const AArch64_input_section&); | |
2548 | ||
2549 | // The relocation stubs. | |
2550 | The_stub_table* stub_table_; | |
2551 | // Original section contents. We have to make a copy here since the file | |
2552 | // containing the original section may not be locked when we need to access | |
2553 | // the contents. | |
2554 | unsigned char* original_contents_; | |
2555 | // Section size of the original input section. | |
2556 | uint32_t original_size_; | |
2557 | // Address alignment of the original input section. | |
2558 | uint32_t original_addralign_; | |
2559 | }; // End of AArch64_input_section | |
2560 | ||
2561 | ||
2562 | // Finalize data size. | |
2563 | ||
2564 | template<int size, bool big_endian> | |
2565 | void | |
2566 | AArch64_input_section<size, big_endian>::set_final_data_size() | |
2567 | { | |
2568 | off_t off = convert_types<off_t, uint64_t>(this->original_size_); | |
2569 | ||
2570 | if (this->is_stub_table_owner()) | |
2571 | { | |
2572 | this->stub_table_->finalize_data_size(); | |
2573 | off = align_address(off, this->stub_table_->addralign()); | |
2574 | off += this->stub_table_->data_size(); | |
2575 | } | |
2576 | this->set_data_size(off); | |
2577 | } | |
2578 | ||
2579 | ||
2580 | // Reset address and file offset. | |
2581 | ||
2582 | template<int size, bool big_endian> | |
2583 | void | |
2584 | AArch64_input_section<size, big_endian>::do_reset_address_and_file_offset() | |
2585 | { | |
2586 | // Size of the original input section contents. | |
2587 | off_t off = convert_types<off_t, uint64_t>(this->original_size_); | |
2588 | ||
2589 | // If this is a stub table owner, account for the stub table size. | |
2590 | if (this->is_stub_table_owner()) | |
2591 | { | |
2592 | The_stub_table* stub_table = this->stub_table_; | |
2593 | ||
2594 | // Reset the stub table's address and file offset. The | |
2595 | // current data size for child will be updated after that. | |
2596 | stub_table_->reset_address_and_file_offset(); | |
2597 | off = align_address(off, stub_table_->addralign()); | |
2598 | off += stub_table->current_data_size(); | |
2599 | } | |
2600 | ||
2601 | this->set_current_data_size(off); | |
2602 | } | |
2603 | ||
2604 | ||
2605 | // Initialize an Arm_input_section. | |
2606 | ||
2607 | template<int size, bool big_endian> | |
2608 | void | |
2609 | AArch64_input_section<size, big_endian>::init() | |
2610 | { | |
2611 | Relobj* relobj = this->relobj(); | |
2612 | unsigned int shndx = this->shndx(); | |
2613 | ||
2614 | // We have to cache original size, alignment and contents to avoid locking | |
2615 | // the original file. | |
2616 | this->original_addralign_ = | |
2617 | convert_types<uint32_t, uint64_t>(relobj->section_addralign(shndx)); | |
2618 | ||
2619 | // This is not efficient but we expect only a small number of relaxed | |
2620 | // input sections for stubs. | |
2621 | section_size_type section_size; | |
2622 | const unsigned char* section_contents = | |
2623 | relobj->section_contents(shndx, §ion_size, false); | |
2624 | this->original_size_ = | |
2625 | convert_types<uint32_t, uint64_t>(relobj->section_size(shndx)); | |
2626 | ||
2627 | gold_assert(this->original_contents_ == NULL); | |
2628 | this->original_contents_ = new unsigned char[section_size]; | |
2629 | memcpy(this->original_contents_, section_contents, section_size); | |
2630 | ||
2631 | // We want to make this look like the original input section after | |
2632 | // output sections are finalized. | |
2633 | Output_section* os = relobj->output_section(shndx); | |
2634 | off_t offset = relobj->output_section_offset(shndx); | |
2635 | gold_assert(os != NULL && !relobj->is_output_section_offset_invalid(shndx)); | |
2636 | this->set_address(os->address() + offset); | |
2637 | this->set_file_offset(os->offset() + offset); | |
2638 | this->set_current_data_size(this->original_size_); | |
2639 | this->finalize_data_size(); | |
2640 | } | |
2641 | ||
2642 | ||
2643 | // Write data to output file. | |
2644 | ||
2645 | template<int size, bool big_endian> | |
2646 | void | |
2647 | AArch64_input_section<size, big_endian>::do_write(Output_file* of) | |
2648 | { | |
2649 | // We have to write out the original section content. | |
2650 | gold_assert(this->original_contents_ != NULL); | |
2651 | of->write(this->offset(), this->original_contents_, | |
2652 | this->original_size_); | |
2653 | ||
2654 | // If this owns a stub table and it is not empty, write it. | |
2655 | if (this->is_stub_table_owner() && !this->stub_table_->empty()) | |
2656 | this->stub_table_->write(of); | |
2657 | } | |
2658 | ||
2659 | ||
2660 | // Arm output section class. This is defined mainly to add a number of stub | |
2661 | // generation methods. | |
2662 | ||
2663 | template<int size, bool big_endian> | |
2664 | class AArch64_output_section : public Output_section | |
2665 | { | |
2666 | public: | |
2667 | typedef Target_aarch64<size, big_endian> The_target_aarch64; | |
2668 | typedef AArch64_relobj<size, big_endian> The_aarch64_relobj; | |
2669 | typedef Stub_table<size, big_endian> The_stub_table; | |
2670 | typedef AArch64_input_section<size, big_endian> The_aarch64_input_section; | |
2671 | ||
2672 | public: | |
2673 | AArch64_output_section(const char* name, elfcpp::Elf_Word type, | |
2674 | elfcpp::Elf_Xword flags) | |
2675 | : Output_section(name, type, flags) | |
2676 | { } | |
2677 | ||
2678 | ~AArch64_output_section() {} | |
2679 | ||
2680 | // Group input sections for stub generation. | |
2681 | void | |
2682 | group_sections(section_size_type, bool, Target_aarch64<size, big_endian>*, | |
2683 | const Task*); | |
2684 | ||
2685 | private: | |
2686 | typedef Output_section::Input_section Input_section; | |
2687 | typedef Output_section::Input_section_list Input_section_list; | |
2688 | ||
2689 | // Create a stub group. | |
2690 | void | |
2691 | create_stub_group(Input_section_list::const_iterator, | |
2692 | Input_section_list::const_iterator, | |
2693 | Input_section_list::const_iterator, | |
2694 | The_target_aarch64*, | |
2695 | std::vector<Output_relaxed_input_section*>&, | |
2696 | const Task*); | |
2697 | }; // End of AArch64_output_section | |
2698 | ||
2699 | ||
2700 | // Create a stub group for input sections from FIRST to LAST. OWNER points to | |
2701 | // the input section that will be the owner of the stub table. | |
2702 | ||
2703 | template<int size, bool big_endian> void | |
2704 | AArch64_output_section<size, big_endian>::create_stub_group( | |
2705 | Input_section_list::const_iterator first, | |
2706 | Input_section_list::const_iterator last, | |
2707 | Input_section_list::const_iterator owner, | |
2708 | The_target_aarch64* target, | |
2709 | std::vector<Output_relaxed_input_section*>& new_relaxed_sections, | |
2710 | const Task* task) | |
2711 | { | |
2712 | // Currently we convert ordinary input sections into relaxed sections only | |
2713 | // at this point. | |
2714 | The_aarch64_input_section* input_section; | |
2715 | if (owner->is_relaxed_input_section()) | |
2716 | gold_unreachable(); | |
2717 | else | |
2718 | { | |
2719 | gold_assert(owner->is_input_section()); | |
2720 | // Create a new relaxed input section. We need to lock the original | |
2721 | // file. | |
2722 | Task_lock_obj<Object> tl(task, owner->relobj()); | |
2723 | input_section = | |
2724 | target->new_aarch64_input_section(owner->relobj(), owner->shndx()); | |
2725 | new_relaxed_sections.push_back(input_section); | |
2726 | } | |
2727 | ||
2728 | // Create a stub table. | |
2729 | The_stub_table* stub_table = | |
2730 | target->new_stub_table(input_section); | |
2731 | ||
2732 | input_section->set_stub_table(stub_table); | |
2733 | ||
2734 | Input_section_list::const_iterator p = first; | |
2735 | // Look for input sections or relaxed input sections in [first ... last]. | |
2736 | do | |
2737 | { | |
2738 | if (p->is_input_section() || p->is_relaxed_input_section()) | |
2739 | { | |
2740 | // The stub table information for input sections live | |
2741 | // in their objects. | |
2742 | The_aarch64_relobj* aarch64_relobj = | |
2743 | static_cast<The_aarch64_relobj*>(p->relobj()); | |
2744 | aarch64_relobj->set_stub_table(p->shndx(), stub_table); | |
2745 | } | |
2746 | } | |
2747 | while (p++ != last); | |
2748 | } | |
2749 | ||
2750 | ||
2751 | // Group input sections for stub generation. GROUP_SIZE is roughly the limit of | |
2752 | // stub groups. We grow a stub group by adding input section until the size is | |
2753 | // just below GROUP_SIZE. The last input section will be converted into a stub | |
2754 | // table owner. If STUB_ALWAYS_AFTER_BRANCH is false, we also add input sectiond | |
2755 | // after the stub table, effectively doubling the group size. | |
2756 | // | |
2757 | // This is similar to the group_sections() function in elf32-arm.c but is | |
2758 | // implemented differently. | |
2759 | ||
2760 | template<int size, bool big_endian> | |
2761 | void AArch64_output_section<size, big_endian>::group_sections( | |
2762 | section_size_type group_size, | |
2763 | bool stubs_always_after_branch, | |
2764 | Target_aarch64<size, big_endian>* target, | |
2765 | const Task* task) | |
2766 | { | |
2767 | typedef enum | |
2768 | { | |
2769 | NO_GROUP, | |
2770 | FINDING_STUB_SECTION, | |
2771 | HAS_STUB_SECTION | |
2772 | } State; | |
2773 | ||
2774 | std::vector<Output_relaxed_input_section*> new_relaxed_sections; | |
2775 | ||
2776 | State state = NO_GROUP; | |
2777 | section_size_type off = 0; | |
2778 | section_size_type group_begin_offset = 0; | |
2779 | section_size_type group_end_offset = 0; | |
2780 | section_size_type stub_table_end_offset = 0; | |
2781 | Input_section_list::const_iterator group_begin = | |
2782 | this->input_sections().end(); | |
2783 | Input_section_list::const_iterator stub_table = | |
2784 | this->input_sections().end(); | |
2785 | Input_section_list::const_iterator group_end = this->input_sections().end(); | |
2786 | for (Input_section_list::const_iterator p = this->input_sections().begin(); | |
2787 | p != this->input_sections().end(); | |
2788 | ++p) | |
2789 | { | |
2790 | section_size_type section_begin_offset = | |
2791 | align_address(off, p->addralign()); | |
2792 | section_size_type section_end_offset = | |
2793 | section_begin_offset + p->data_size(); | |
2794 | ||
2795 | // Check to see if we should group the previously seen sections. | |
2796 | switch (state) | |
2797 | { | |
2798 | case NO_GROUP: | |
2799 | break; | |
2800 | ||
2801 | case FINDING_STUB_SECTION: | |
2802 | // Adding this section makes the group larger than GROUP_SIZE. | |
2803 | if (section_end_offset - group_begin_offset >= group_size) | |
2804 | { | |
2805 | if (stubs_always_after_branch) | |
2806 | { | |
2807 | gold_assert(group_end != this->input_sections().end()); | |
2808 | this->create_stub_group(group_begin, group_end, group_end, | |
2809 | target, new_relaxed_sections, | |
2810 | task); | |
2811 | state = NO_GROUP; | |
2812 | } | |
2813 | else | |
2814 | { | |
2815 | // Input sections up to stub_group_size bytes after the stub | |
2816 | // table can be handled by it too. | |
2817 | state = HAS_STUB_SECTION; | |
2818 | stub_table = group_end; | |
2819 | stub_table_end_offset = group_end_offset; | |
2820 | } | |
2821 | } | |
2822 | break; | |
2823 | ||
2824 | case HAS_STUB_SECTION: | |
2825 | // Adding this section makes the post stub-section group larger | |
2826 | // than GROUP_SIZE. | |
2827 | gold_unreachable(); | |
2828 | // NOT SUPPORTED YET. For completeness only. | |
2829 | if (section_end_offset - stub_table_end_offset >= group_size) | |
2830 | { | |
2831 | gold_assert(group_end != this->input_sections().end()); | |
2832 | this->create_stub_group(group_begin, group_end, stub_table, | |
2833 | target, new_relaxed_sections, task); | |
2834 | state = NO_GROUP; | |
2835 | } | |
2836 | break; | |
2837 | ||
2838 | default: | |
2839 | gold_unreachable(); | |
2840 | } | |
2841 | ||
2842 | // If we see an input section and currently there is no group, start | |
2843 | // a new one. Skip any empty sections. We look at the data size | |
2844 | // instead of calling p->relobj()->section_size() to avoid locking. | |
2845 | if ((p->is_input_section() || p->is_relaxed_input_section()) | |
2846 | && (p->data_size() != 0)) | |
2847 | { | |
2848 | if (state == NO_GROUP) | |
2849 | { | |
2850 | state = FINDING_STUB_SECTION; | |
2851 | group_begin = p; | |
2852 | group_begin_offset = section_begin_offset; | |
2853 | } | |
2854 | ||
2855 | // Keep track of the last input section seen. | |
2856 | group_end = p; | |
2857 | group_end_offset = section_end_offset; | |
2858 | } | |
2859 | ||
2860 | off = section_end_offset; | |
2861 | } | |
2862 | ||
2863 | // Create a stub group for any ungrouped sections. | |
2864 | if (state == FINDING_STUB_SECTION || state == HAS_STUB_SECTION) | |
2865 | { | |
2866 | gold_assert(group_end != this->input_sections().end()); | |
2867 | this->create_stub_group(group_begin, group_end, | |
2868 | (state == FINDING_STUB_SECTION | |
2869 | ? group_end | |
2870 | : stub_table), | |
2871 | target, new_relaxed_sections, task); | |
2872 | } | |
8e33481e | 2873 | |
83a01957 HS |
2874 | if (!new_relaxed_sections.empty()) |
2875 | this->convert_input_sections_to_relaxed_sections(new_relaxed_sections); | |
2876 | ||
2877 | // Update the section offsets | |
2878 | for (size_t i = 0; i < new_relaxed_sections.size(); ++i) | |
2879 | { | |
2880 | The_aarch64_relobj* relobj = static_cast<The_aarch64_relobj*>( | |
2881 | new_relaxed_sections[i]->relobj()); | |
2882 | unsigned int shndx = new_relaxed_sections[i]->shndx(); | |
2883 | // Tell AArch64_relobj that this input section is converted. | |
2884 | relobj->convert_input_section_to_relaxed_section(shndx); | |
2885 | } | |
2886 | } // End of AArch64_output_section::group_sections | |
3a531937 | 2887 | |
053a4d68 | 2888 | |
9363c7c3 JY |
2889 | AArch64_reloc_property_table* aarch64_reloc_property_table = NULL; |
2890 | ||
3a531937 | 2891 | |
053a4d68 JY |
2892 | // The aarch64 target class. |
2893 | // See the ABI at | |
2894 | // http://infocenter.arm.com/help/topic/com.arm.doc.ihi0056b/IHI0056B_aaelf64.pdf | |
2895 | template<int size, bool big_endian> | |
2896 | class Target_aarch64 : public Sized_target<size, big_endian> | |
2897 | { | |
2898 | public: | |
83a01957 | 2899 | typedef Target_aarch64<size, big_endian> This; |
053a4d68 JY |
2900 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
2901 | Reloc_section; | |
83a01957 | 2902 | typedef Relocate_info<size, big_endian> The_relocate_info; |
053a4d68 | 2903 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
83a01957 HS |
2904 | typedef AArch64_relobj<size, big_endian> The_aarch64_relobj; |
2905 | typedef Reloc_stub<size, big_endian> The_reloc_stub; | |
a48d0c12 | 2906 | typedef Erratum_stub<size, big_endian> The_erratum_stub; |
83a01957 HS |
2907 | typedef typename Reloc_stub<size, big_endian>::Key The_reloc_stub_key; |
2908 | typedef Stub_table<size, big_endian> The_stub_table; | |
2909 | typedef std::vector<The_stub_table*> Stub_table_list; | |
2910 | typedef typename Stub_table_list::iterator Stub_table_iterator; | |
2911 | typedef AArch64_input_section<size, big_endian> The_aarch64_input_section; | |
2912 | typedef AArch64_output_section<size, big_endian> The_aarch64_output_section; | |
2913 | typedef Unordered_map<Section_id, | |
2914 | AArch64_input_section<size, big_endian>*, | |
2915 | Section_id_hash> AArch64_input_section_map; | |
5019d64a | 2916 | typedef AArch64_insn_utilities<big_endian> Insn_utilities; |
8e33481e | 2917 | const static int TCB_SIZE = size / 8 * 2; |
053a4d68 JY |
2918 | |
2919 | Target_aarch64(const Target::Target_info* info = &aarch64_info) | |
2920 | : Sized_target<size, big_endian>(info), | |
3a531937 JY |
2921 | got_(NULL), plt_(NULL), got_plt_(NULL), got_irelative_(NULL), |
2922 | got_tlsdesc_(NULL), global_offset_table_(NULL), rela_dyn_(NULL), | |
2923 | rela_irelative_(NULL), copy_relocs_(elfcpp::R_AARCH64_COPY), | |
83a01957 HS |
2924 | got_mod_index_offset_(-1U), |
2925 | tlsdesc_reloc_info_(), tls_base_symbol_defined_(false), | |
0bf32ea9 | 2926 | stub_tables_(), stub_group_size_(0), aarch64_input_section_map_() |
053a4d68 JY |
2927 | { } |
2928 | ||
2929 | // Scan the relocations to determine unreferenced sections for | |
2930 | // garbage collection. | |
2931 | void | |
2932 | gc_process_relocs(Symbol_table* symtab, | |
2933 | Layout* layout, | |
2934 | Sized_relobj_file<size, big_endian>* object, | |
2935 | unsigned int data_shndx, | |
2936 | unsigned int sh_type, | |
2937 | const unsigned char* prelocs, | |
2938 | size_t reloc_count, | |
2939 | Output_section* output_section, | |
2940 | bool needs_special_offset_handling, | |
2941 | size_t local_symbol_count, | |
2942 | const unsigned char* plocal_symbols); | |
2943 | ||
2944 | // Scan the relocations to look for symbol adjustments. | |
2945 | void | |
2946 | scan_relocs(Symbol_table* symtab, | |
2947 | Layout* layout, | |
2948 | Sized_relobj_file<size, big_endian>* object, | |
2949 | unsigned int data_shndx, | |
2950 | unsigned int sh_type, | |
2951 | const unsigned char* prelocs, | |
2952 | size_t reloc_count, | |
2953 | Output_section* output_section, | |
2954 | bool needs_special_offset_handling, | |
2955 | size_t local_symbol_count, | |
2956 | const unsigned char* plocal_symbols); | |
2957 | ||
2958 | // Finalize the sections. | |
2959 | void | |
2960 | do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); | |
2961 | ||
3a531937 JY |
2962 | // Return the value to use for a dynamic which requires special |
2963 | // treatment. | |
2964 | uint64_t | |
2965 | do_dynsym_value(const Symbol*) const; | |
2966 | ||
053a4d68 JY |
2967 | // Relocate a section. |
2968 | void | |
2969 | relocate_section(const Relocate_info<size, big_endian>*, | |
2970 | unsigned int sh_type, | |
2971 | const unsigned char* prelocs, | |
2972 | size_t reloc_count, | |
2973 | Output_section* output_section, | |
2974 | bool needs_special_offset_handling, | |
2975 | unsigned char* view, | |
2976 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
2977 | section_size_type view_size, | |
2978 | const Reloc_symbol_changes*); | |
2979 | ||
2980 | // Scan the relocs during a relocatable link. | |
2981 | void | |
2982 | scan_relocatable_relocs(Symbol_table* symtab, | |
2983 | Layout* layout, | |
2984 | Sized_relobj_file<size, big_endian>* object, | |
2985 | unsigned int data_shndx, | |
2986 | unsigned int sh_type, | |
2987 | const unsigned char* prelocs, | |
2988 | size_t reloc_count, | |
2989 | Output_section* output_section, | |
2990 | bool needs_special_offset_handling, | |
2991 | size_t local_symbol_count, | |
2992 | const unsigned char* plocal_symbols, | |
2993 | Relocatable_relocs*); | |
2994 | ||
4d625b70 CC |
2995 | // Scan the relocs for --emit-relocs. |
2996 | void | |
2997 | emit_relocs_scan(Symbol_table* symtab, | |
2998 | Layout* layout, | |
2999 | Sized_relobj_file<size, big_endian>* object, | |
3000 | unsigned int data_shndx, | |
3001 | unsigned int sh_type, | |
3002 | const unsigned char* prelocs, | |
3003 | size_t reloc_count, | |
3004 | Output_section* output_section, | |
3005 | bool needs_special_offset_handling, | |
3006 | size_t local_symbol_count, | |
3007 | const unsigned char* plocal_syms, | |
3008 | Relocatable_relocs* rr); | |
3009 | ||
053a4d68 JY |
3010 | // Relocate a section during a relocatable link. |
3011 | void | |
3012 | relocate_relocs( | |
3013 | const Relocate_info<size, big_endian>*, | |
3014 | unsigned int sh_type, | |
3015 | const unsigned char* prelocs, | |
3016 | size_t reloc_count, | |
3017 | Output_section* output_section, | |
3018 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, | |
053a4d68 JY |
3019 | unsigned char* view, |
3020 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
3021 | section_size_type view_size, | |
3022 | unsigned char* reloc_view, | |
3023 | section_size_type reloc_view_size); | |
3024 | ||
3a531937 JY |
3025 | // Return the symbol index to use for a target specific relocation. |
3026 | // The only target specific relocation is R_AARCH64_TLSDESC for a | |
3027 | // local symbol, which is an absolute reloc. | |
3028 | unsigned int | |
3029 | do_reloc_symbol_index(void*, unsigned int r_type) const | |
3030 | { | |
3031 | gold_assert(r_type == elfcpp::R_AARCH64_TLSDESC); | |
3032 | return 0; | |
3033 | } | |
3034 | ||
3035 | // Return the addend to use for a target specific relocation. | |
7fa5525f RÁE |
3036 | uint64_t |
3037 | do_reloc_addend(void* arg, unsigned int r_type, uint64_t addend) const; | |
3a531937 | 3038 | |
9363c7c3 JY |
3039 | // Return the PLT section. |
3040 | uint64_t | |
3041 | do_plt_address_for_global(const Symbol* gsym) const | |
3042 | { return this->plt_section()->address_for_global(gsym); } | |
3043 | ||
3044 | uint64_t | |
3045 | do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const | |
3046 | { return this->plt_section()->address_for_local(relobj, symndx); } | |
3047 | ||
9726c3c1 HS |
3048 | // This function should be defined in targets that can use relocation |
3049 | // types to determine (implemented in local_reloc_may_be_function_pointer | |
3050 | // and global_reloc_may_be_function_pointer) | |
3051 | // if a function's pointer is taken. ICF uses this in safe mode to only | |
3052 | // fold those functions whose pointer is defintely not taken. | |
3053 | bool | |
3054 | do_can_check_for_function_pointers() const | |
3055 | { return true; } | |
3056 | ||
053a4d68 JY |
3057 | // Return the number of entries in the PLT. |
3058 | unsigned int | |
3059 | plt_entry_count() const; | |
3060 | ||
3061 | //Return the offset of the first non-reserved PLT entry. | |
3062 | unsigned int | |
3063 | first_plt_entry_offset() const; | |
3064 | ||
3065 | // Return the size of each PLT entry. | |
3066 | unsigned int | |
3067 | plt_entry_size() const; | |
3068 | ||
83a01957 HS |
3069 | // Create a stub table. |
3070 | The_stub_table* | |
3071 | new_stub_table(The_aarch64_input_section*); | |
3072 | ||
3073 | // Create an aarch64 input section. | |
3074 | The_aarch64_input_section* | |
3075 | new_aarch64_input_section(Relobj*, unsigned int); | |
3076 | ||
3077 | // Find an aarch64 input section instance for a given OBJ and SHNDX. | |
3078 | The_aarch64_input_section* | |
3079 | find_aarch64_input_section(Relobj*, unsigned int) const; | |
3080 | ||
3081 | // Return the thread control block size. | |
8e33481e HS |
3082 | unsigned int |
3083 | tcb_size() const { return This::TCB_SIZE; } | |
3084 | ||
83a01957 HS |
3085 | // Scan a section for stub generation. |
3086 | void | |
3087 | scan_section_for_stubs(const Relocate_info<size, big_endian>*, unsigned int, | |
3088 | const unsigned char*, size_t, Output_section*, | |
3089 | bool, const unsigned char*, | |
3090 | Address, | |
3091 | section_size_type); | |
3092 | ||
3093 | // Scan a relocation section for stub. | |
3094 | template<int sh_type> | |
3095 | void | |
3096 | scan_reloc_section_for_stubs( | |
3097 | const The_relocate_info* relinfo, | |
3098 | const unsigned char* prelocs, | |
3099 | size_t reloc_count, | |
3100 | Output_section* output_section, | |
3101 | bool needs_special_offset_handling, | |
3102 | const unsigned char* view, | |
3103 | Address view_address, | |
3104 | section_size_type); | |
3105 | ||
df2f63a6 | 3106 | // Relocate a single reloc stub. |
83a01957 | 3107 | void |
df2f63a6 HS |
3108 | relocate_reloc_stub(The_reloc_stub*, const Relocate_info<size, big_endian>*, |
3109 | Output_section*, unsigned char*, Address, | |
3110 | section_size_type); | |
83a01957 HS |
3111 | |
3112 | // Get the default AArch64 target. | |
3113 | static This* | |
3114 | current_target() | |
3115 | { | |
3116 | gold_assert(parameters->target().machine_code() == elfcpp::EM_AARCH64 | |
3117 | && parameters->target().get_size() == size | |
3118 | && parameters->target().is_big_endian() == big_endian); | |
3119 | return static_cast<This*>(parameters->sized_target<size, big_endian>()); | |
3120 | } | |
3121 | ||
5019d64a | 3122 | |
2f0c79aa | 3123 | // Scan erratum 843419 for a part of a section. |
5019d64a HS |
3124 | void |
3125 | scan_erratum_843419_span( | |
3126 | AArch64_relobj<size, big_endian>*, | |
2f0c79aa HS |
3127 | unsigned int, |
3128 | const section_size_type, | |
3129 | const section_size_type, | |
3130 | unsigned char*, | |
3131 | Address); | |
3132 | ||
3133 | // Scan erratum 835769 for a part of a section. | |
3134 | void | |
3135 | scan_erratum_835769_span( | |
3136 | AArch64_relobj<size, big_endian>*, | |
3137 | unsigned int, | |
5019d64a HS |
3138 | const section_size_type, |
3139 | const section_size_type, | |
3140 | unsigned char*, | |
3141 | Address); | |
3142 | ||
9363c7c3 JY |
3143 | protected: |
3144 | void | |
3145 | do_select_as_default_target() | |
3146 | { | |
3147 | gold_assert(aarch64_reloc_property_table == NULL); | |
3148 | aarch64_reloc_property_table = new AArch64_reloc_property_table(); | |
3149 | } | |
3150 | ||
3a531937 JY |
3151 | // Add a new reloc argument, returning the index in the vector. |
3152 | size_t | |
3153 | add_tlsdesc_info(Sized_relobj_file<size, big_endian>* object, | |
3154 | unsigned int r_sym) | |
3155 | { | |
3156 | this->tlsdesc_reloc_info_.push_back(Tlsdesc_info(object, r_sym)); | |
3157 | return this->tlsdesc_reloc_info_.size() - 1; | |
3158 | } | |
3159 | ||
9363c7c3 | 3160 | virtual Output_data_plt_aarch64<size, big_endian>* |
3a531937 JY |
3161 | do_make_data_plt(Layout* layout, |
3162 | Output_data_got_aarch64<size, big_endian>* got, | |
3163 | Output_data_space* got_plt, | |
3164 | Output_data_space* got_irelative) | |
9363c7c3 | 3165 | { |
3a531937 JY |
3166 | return new Output_data_plt_aarch64_standard<size, big_endian>( |
3167 | layout, got, got_plt, got_irelative); | |
9363c7c3 JY |
3168 | } |
3169 | ||
83a01957 HS |
3170 | |
3171 | // do_make_elf_object to override the same function in the base class. | |
3172 | Object* | |
3173 | do_make_elf_object(const std::string&, Input_file*, off_t, | |
3174 | const elfcpp::Ehdr<size, big_endian>&); | |
3175 | ||
9363c7c3 | 3176 | Output_data_plt_aarch64<size, big_endian>* |
3a531937 JY |
3177 | make_data_plt(Layout* layout, |
3178 | Output_data_got_aarch64<size, big_endian>* got, | |
3179 | Output_data_space* got_plt, | |
3180 | Output_data_space* got_irelative) | |
9363c7c3 | 3181 | { |
3a531937 | 3182 | return this->do_make_data_plt(layout, got, got_plt, got_irelative); |
9363c7c3 JY |
3183 | } |
3184 | ||
83a01957 HS |
3185 | // We only need to generate stubs, and hence perform relaxation if we are |
3186 | // not doing relocatable linking. | |
3187 | virtual bool | |
3188 | do_may_relax() const | |
3189 | { return !parameters->options().relocatable(); } | |
3190 | ||
3191 | // Relaxation hook. This is where we do stub generation. | |
3192 | virtual bool | |
3193 | do_relax(int, const Input_objects*, Symbol_table*, Layout*, const Task*); | |
3194 | ||
3195 | void | |
3196 | group_sections(Layout* layout, | |
3197 | section_size_type group_size, | |
3198 | bool stubs_always_after_branch, | |
3199 | const Task* task); | |
3200 | ||
3201 | void | |
3202 | scan_reloc_for_stub(const The_relocate_info*, unsigned int, | |
3203 | const Sized_symbol<size>*, unsigned int, | |
3204 | const Symbol_value<size>*, | |
3205 | typename elfcpp::Elf_types<size>::Elf_Swxword, | |
3206 | Address Elf_Addr); | |
3207 | ||
3208 | // Make an output section. | |
3209 | Output_section* | |
3210 | do_make_output_section(const char* name, elfcpp::Elf_Word type, | |
3211 | elfcpp::Elf_Xword flags) | |
3212 | { return new The_aarch64_output_section(name, type, flags); } | |
3213 | ||
053a4d68 JY |
3214 | private: |
3215 | // The class which scans relocations. | |
3216 | class Scan | |
3217 | { | |
3218 | public: | |
3219 | Scan() | |
3220 | : issued_non_pic_error_(false) | |
3221 | { } | |
3222 | ||
053a4d68 JY |
3223 | inline void |
3224 | local(Symbol_table* symtab, Layout* layout, Target_aarch64* target, | |
3225 | Sized_relobj_file<size, big_endian>* object, | |
3226 | unsigned int data_shndx, | |
3227 | Output_section* output_section, | |
3228 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
3229 | const elfcpp::Sym<size, big_endian>& lsym, | |
3230 | bool is_discarded); | |
3231 | ||
3232 | inline void | |
3233 | global(Symbol_table* symtab, Layout* layout, Target_aarch64* target, | |
3234 | Sized_relobj_file<size, big_endian>* object, | |
3235 | unsigned int data_shndx, | |
3236 | Output_section* output_section, | |
3237 | const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, | |
3238 | Symbol* gsym); | |
3239 | ||
3240 | inline bool | |
3241 | local_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
9363c7c3 JY |
3242 | Target_aarch64<size, big_endian>* , |
3243 | Sized_relobj_file<size, big_endian>* , | |
3244 | unsigned int , | |
3245 | Output_section* , | |
3246 | const elfcpp::Rela<size, big_endian>& , | |
3247 | unsigned int r_type, | |
3248 | const elfcpp::Sym<size, big_endian>&); | |
053a4d68 JY |
3249 | |
3250 | inline bool | |
3251 | global_reloc_may_be_function_pointer(Symbol_table* , Layout* , | |
9363c7c3 JY |
3252 | Target_aarch64<size, big_endian>* , |
3253 | Sized_relobj_file<size, big_endian>* , | |
3254 | unsigned int , | |
3255 | Output_section* , | |
3256 | const elfcpp::Rela<size, big_endian>& , | |
3257 | unsigned int r_type, | |
3258 | Symbol* gsym); | |
053a4d68 JY |
3259 | |
3260 | private: | |
3261 | static void | |
3262 | unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, | |
3263 | unsigned int r_type); | |
3264 | ||
3265 | static void | |
3266 | unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, | |
3267 | unsigned int r_type, Symbol*); | |
3268 | ||
3269 | inline bool | |
3270 | possible_function_pointer_reloc(unsigned int r_type); | |
3271 | ||
3272 | void | |
3273 | check_non_pic(Relobj*, unsigned int r_type); | |
3274 | ||
9726c3c1 HS |
3275 | bool |
3276 | reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>*, | |
3277 | unsigned int r_type); | |
3278 | ||
053a4d68 JY |
3279 | // Whether we have issued an error about a non-PIC compilation. |
3280 | bool issued_non_pic_error_; | |
3281 | }; | |
3282 | ||
3283 | // The class which implements relocation. | |
3284 | class Relocate | |
3285 | { | |
3286 | public: | |
3287 | Relocate() | |
3a531937 | 3288 | : skip_call_tls_get_addr_(false) |
053a4d68 JY |
3289 | { } |
3290 | ||
3291 | ~Relocate() | |
3292 | { } | |
3293 | ||
3294 | // Do a relocation. Return false if the caller should not issue | |
3295 | // any warnings about this relocation. | |
3296 | inline bool | |
91a65d2f AM |
3297 | relocate(const Relocate_info<size, big_endian>*, unsigned int, |
3298 | Target_aarch64*, Output_section*, size_t, const unsigned char*, | |
3299 | const Sized_symbol<size>*, const Symbol_value<size>*, | |
053a4d68 JY |
3300 | unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, |
3301 | section_size_type); | |
3302 | ||
8e33481e | 3303 | private: |
83a01957 HS |
3304 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3305 | relocate_tls(const Relocate_info<size, big_endian>*, | |
8e33481e HS |
3306 | Target_aarch64<size, big_endian>*, |
3307 | size_t, | |
3308 | const elfcpp::Rela<size, big_endian>&, | |
3309 | unsigned int r_type, const Sized_symbol<size>*, | |
3310 | const Symbol_value<size>*, | |
3311 | unsigned char*, | |
3312 | typename elfcpp::Elf_types<size>::Elf_Addr); | |
3313 | ||
83a01957 | 3314 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 3315 | tls_gd_to_le( |
83a01957 | 3316 | const Relocate_info<size, big_endian>*, |
3a531937 JY |
3317 | Target_aarch64<size, big_endian>*, |
3318 | const elfcpp::Rela<size, big_endian>&, | |
3319 | unsigned int, | |
3320 | unsigned char*, | |
3321 | const Symbol_value<size>*); | |
3322 | ||
9726c3c1 HS |
3323 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3324 | tls_ld_to_le( | |
3325 | const Relocate_info<size, big_endian>*, | |
3326 | Target_aarch64<size, big_endian>*, | |
3327 | const elfcpp::Rela<size, big_endian>&, | |
3328 | unsigned int, | |
3329 | unsigned char*, | |
3330 | const Symbol_value<size>*); | |
3331 | ||
83a01957 | 3332 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 3333 | tls_ie_to_le( |
83a01957 | 3334 | const Relocate_info<size, big_endian>*, |
3a531937 JY |
3335 | Target_aarch64<size, big_endian>*, |
3336 | const elfcpp::Rela<size, big_endian>&, | |
3337 | unsigned int, | |
3338 | unsigned char*, | |
3339 | const Symbol_value<size>*); | |
3340 | ||
83a01957 | 3341 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 3342 | tls_desc_gd_to_le( |
83a01957 | 3343 | const Relocate_info<size, big_endian>*, |
3a531937 JY |
3344 | Target_aarch64<size, big_endian>*, |
3345 | const elfcpp::Rela<size, big_endian>&, | |
3346 | unsigned int, | |
3347 | unsigned char*, | |
3348 | const Symbol_value<size>*); | |
3349 | ||
83a01957 | 3350 | inline typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 3351 | tls_desc_gd_to_ie( |
83a01957 | 3352 | const Relocate_info<size, big_endian>*, |
3a531937 JY |
3353 | Target_aarch64<size, big_endian>*, |
3354 | const elfcpp::Rela<size, big_endian>&, | |
3355 | unsigned int, | |
3356 | unsigned char*, | |
3357 | const Symbol_value<size>*, | |
3358 | typename elfcpp::Elf_types<size>::Elf_Addr, | |
3359 | typename elfcpp::Elf_types<size>::Elf_Addr); | |
3360 | ||
3361 | bool skip_call_tls_get_addr_; | |
3362 | ||
8e33481e | 3363 | }; // End of class Relocate |
053a4d68 | 3364 | |
053a4d68 JY |
3365 | // Adjust TLS relocation type based on the options and whether this |
3366 | // is a local symbol. | |
3367 | static tls::Tls_optimization | |
3368 | optimize_tls_reloc(bool is_final, int r_type); | |
3369 | ||
3370 | // Get the GOT section, creating it if necessary. | |
3371 | Output_data_got_aarch64<size, big_endian>* | |
3372 | got_section(Symbol_table*, Layout*); | |
3373 | ||
3374 | // Get the GOT PLT section. | |
3375 | Output_data_space* | |
3376 | got_plt_section() const | |
3377 | { | |
3378 | gold_assert(this->got_plt_ != NULL); | |
3379 | return this->got_plt_; | |
3380 | } | |
3381 | ||
3a531937 JY |
3382 | // Get the GOT section for TLSDESC entries. |
3383 | Output_data_got<size, big_endian>* | |
3384 | got_tlsdesc_section() const | |
3385 | { | |
3386 | gold_assert(this->got_tlsdesc_ != NULL); | |
3387 | return this->got_tlsdesc_; | |
3388 | } | |
3389 | ||
053a4d68 JY |
3390 | // Create the PLT section. |
3391 | void | |
3392 | make_plt_section(Symbol_table* symtab, Layout* layout); | |
3393 | ||
3394 | // Create a PLT entry for a global symbol. | |
3395 | void | |
3396 | make_plt_entry(Symbol_table*, Layout*, Symbol*); | |
3397 | ||
3a531937 JY |
3398 | // Create a PLT entry for a local STT_GNU_IFUNC symbol. |
3399 | void | |
3400 | make_local_ifunc_plt_entry(Symbol_table*, Layout*, | |
3401 | Sized_relobj_file<size, big_endian>* relobj, | |
3402 | unsigned int local_sym_index); | |
3403 | ||
3404 | // Define the _TLS_MODULE_BASE_ symbol in the TLS segment. | |
3405 | void | |
3406 | define_tls_base_symbol(Symbol_table*, Layout*); | |
3407 | ||
3408 | // Create the reserved PLT and GOT entries for the TLS descriptor resolver. | |
3409 | void | |
3410 | reserve_tlsdesc_entries(Symbol_table* symtab, Layout* layout); | |
3411 | ||
3412 | // Create a GOT entry for the TLS module index. | |
3413 | unsigned int | |
3414 | got_mod_index_entry(Symbol_table* symtab, Layout* layout, | |
3415 | Sized_relobj_file<size, big_endian>* object); | |
3416 | ||
053a4d68 JY |
3417 | // Get the PLT section. |
3418 | Output_data_plt_aarch64<size, big_endian>* | |
3419 | plt_section() const | |
3420 | { | |
3421 | gold_assert(this->plt_ != NULL); | |
3422 | return this->plt_; | |
3423 | } | |
3424 | ||
0ef3814f HS |
3425 | // Helper method to create erratum stubs for ST_E_843419 and ST_E_835769. For |
3426 | // ST_E_843419, we need an additional field for adrp offset. | |
2f0c79aa HS |
3427 | void create_erratum_stub( |
3428 | AArch64_relobj<size, big_endian>* relobj, | |
3429 | unsigned int shndx, | |
3430 | section_size_type erratum_insn_offset, | |
3431 | Address erratum_address, | |
3432 | typename Insn_utilities::Insntype erratum_insn, | |
0ef3814f HS |
3433 | int erratum_type, |
3434 | unsigned int e843419_adrp_offset=0); | |
2f0c79aa | 3435 | |
5019d64a HS |
3436 | // Return whether this is a 3-insn erratum sequence. |
3437 | bool is_erratum_843419_sequence( | |
3438 | typename elfcpp::Swap<32,big_endian>::Valtype insn1, | |
3439 | typename elfcpp::Swap<32,big_endian>::Valtype insn2, | |
3440 | typename elfcpp::Swap<32,big_endian>::Valtype insn3); | |
3441 | ||
2f0c79aa HS |
3442 | // Return whether this is a 835769 sequence. |
3443 | // (Similarly implemented as in elfnn-aarch64.c.) | |
3444 | bool is_erratum_835769_sequence( | |
3445 | typename elfcpp::Swap<32,big_endian>::Valtype, | |
3446 | typename elfcpp::Swap<32,big_endian>::Valtype); | |
3447 | ||
053a4d68 JY |
3448 | // Get the dynamic reloc section, creating it if necessary. |
3449 | Reloc_section* | |
3450 | rela_dyn_section(Layout*); | |
3451 | ||
3a531937 JY |
3452 | // Get the section to use for TLSDESC relocations. |
3453 | Reloc_section* | |
3454 | rela_tlsdesc_section(Layout*) const; | |
3455 | ||
3456 | // Get the section to use for IRELATIVE relocations. | |
3457 | Reloc_section* | |
3458 | rela_irelative_section(Layout*); | |
3459 | ||
053a4d68 JY |
3460 | // Add a potential copy relocation. |
3461 | void | |
3462 | copy_reloc(Symbol_table* symtab, Layout* layout, | |
3463 | Sized_relobj_file<size, big_endian>* object, | |
3464 | unsigned int shndx, Output_section* output_section, | |
3465 | Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) | |
3466 | { | |
859d7987 | 3467 | unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
053a4d68 JY |
3468 | this->copy_relocs_.copy_reloc(symtab, layout, |
3469 | symtab->get_sized_symbol<size>(sym), | |
3470 | object, shndx, output_section, | |
859d7987 CC |
3471 | r_type, reloc.get_r_offset(), |
3472 | reloc.get_r_addend(), | |
3473 | this->rela_dyn_section(layout)); | |
053a4d68 JY |
3474 | } |
3475 | ||
3476 | // Information about this specific target which we pass to the | |
3477 | // general Target structure. | |
3478 | static const Target::Target_info aarch64_info; | |
3479 | ||
3480 | // The types of GOT entries needed for this platform. | |
3481 | // These values are exposed to the ABI in an incremental link. | |
3482 | // Do not renumber existing values without changing the version | |
3483 | // number of the .gnu_incremental_inputs section. | |
3484 | enum Got_type | |
3485 | { | |
3486 | GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol | |
3487 | GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset | |
3488 | GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair | |
3489 | GOT_TYPE_TLS_DESC = 3 // GOT entry for TLS_DESC pair | |
3490 | }; | |
3491 | ||
3a531937 JY |
3492 | // This type is used as the argument to the target specific |
3493 | // relocation routines. The only target specific reloc is | |
3494 | // R_AARCh64_TLSDESC against a local symbol. | |
3495 | struct Tlsdesc_info | |
3496 | { | |
3497 | Tlsdesc_info(Sized_relobj_file<size, big_endian>* a_object, | |
3498 | unsigned int a_r_sym) | |
3499 | : object(a_object), r_sym(a_r_sym) | |
3500 | { } | |
3501 | ||
3502 | // The object in which the local symbol is defined. | |
3503 | Sized_relobj_file<size, big_endian>* object; | |
3504 | // The local symbol index in the object. | |
3505 | unsigned int r_sym; | |
3506 | }; | |
3507 | ||
053a4d68 JY |
3508 | // The GOT section. |
3509 | Output_data_got_aarch64<size, big_endian>* got_; | |
3510 | // The PLT section. | |
3511 | Output_data_plt_aarch64<size, big_endian>* plt_; | |
3512 | // The GOT PLT section. | |
3513 | Output_data_space* got_plt_; | |
3a531937 JY |
3514 | // The GOT section for IRELATIVE relocations. |
3515 | Output_data_space* got_irelative_; | |
3516 | // The GOT section for TLSDESC relocations. | |
3517 | Output_data_got<size, big_endian>* got_tlsdesc_; | |
053a4d68 JY |
3518 | // The _GLOBAL_OFFSET_TABLE_ symbol. |
3519 | Symbol* global_offset_table_; | |
3520 | // The dynamic reloc section. | |
3521 | Reloc_section* rela_dyn_; | |
3a531937 JY |
3522 | // The section to use for IRELATIVE relocs. |
3523 | Reloc_section* rela_irelative_; | |
053a4d68 JY |
3524 | // Relocs saved to avoid a COPY reloc. |
3525 | Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; | |
3a531937 JY |
3526 | // Offset of the GOT entry for the TLS module index. |
3527 | unsigned int got_mod_index_offset_; | |
3528 | // We handle R_AARCH64_TLSDESC against a local symbol as a target | |
3529 | // specific relocation. Here we store the object and local symbol | |
3530 | // index for the relocation. | |
3531 | std::vector<Tlsdesc_info> tlsdesc_reloc_info_; | |
3532 | // True if the _TLS_MODULE_BASE_ symbol has been defined. | |
3533 | bool tls_base_symbol_defined_; | |
83a01957 HS |
3534 | // List of stub_tables |
3535 | Stub_table_list stub_tables_; | |
0bf32ea9 JY |
3536 | // Actual stub group size |
3537 | section_size_type stub_group_size_; | |
83a01957 | 3538 | AArch64_input_section_map aarch64_input_section_map_; |
8e33481e | 3539 | }; // End of Target_aarch64 |
053a4d68 | 3540 | |
3a531937 | 3541 | |
053a4d68 JY |
3542 | template<> |
3543 | const Target::Target_info Target_aarch64<64, false>::aarch64_info = | |
3544 | { | |
3545 | 64, // size | |
3546 | false, // is_big_endian | |
3547 | elfcpp::EM_AARCH64, // machine_code | |
3548 | false, // has_make_symbol | |
3549 | false, // has_resolve | |
3550 | false, // has_code_fill | |
0cf44ec8 | 3551 | false, // is_default_stack_executable |
9726c3c1 | 3552 | true, // can_icf_inline_merge_sections |
053a4d68 JY |
3553 | '\0', // wrap_char |
3554 | "/lib/ld.so.1", // program interpreter | |
3555 | 0x400000, // default_text_segment_address | |
3b0357da | 3556 | 0x10000, // abi_pagesize (overridable by -z max-page-size) |
053a4d68 JY |
3557 | 0x1000, // common_pagesize (overridable by -z common-page-size) |
3558 | false, // isolate_execinstr | |
3559 | 0, // rosegment_gap | |
3560 | elfcpp::SHN_UNDEF, // small_common_shndx | |
3561 | elfcpp::SHN_UNDEF, // large_common_shndx | |
3562 | 0, // small_common_section_flags | |
3563 | 0, // large_common_section_flags | |
3564 | NULL, // attributes_section | |
3565 | NULL, // attributes_vendor | |
8d9743bd MK |
3566 | "_start", // entry_symbol_name |
3567 | 32, // hash_entry_size | |
bce5a025 | 3568 | elfcpp::SHT_PROGBITS, // unwind_section_type |
053a4d68 JY |
3569 | }; |
3570 | ||
3571 | template<> | |
3572 | const Target::Target_info Target_aarch64<32, false>::aarch64_info = | |
3573 | { | |
3574 | 32, // size | |
3575 | false, // is_big_endian | |
3576 | elfcpp::EM_AARCH64, // machine_code | |
3577 | false, // has_make_symbol | |
3578 | false, // has_resolve | |
3579 | false, // has_code_fill | |
0cf44ec8 | 3580 | false, // is_default_stack_executable |
053a4d68 JY |
3581 | false, // can_icf_inline_merge_sections |
3582 | '\0', // wrap_char | |
3583 | "/lib/ld.so.1", // program interpreter | |
3584 | 0x400000, // default_text_segment_address | |
3b0357da | 3585 | 0x10000, // abi_pagesize (overridable by -z max-page-size) |
053a4d68 JY |
3586 | 0x1000, // common_pagesize (overridable by -z common-page-size) |
3587 | false, // isolate_execinstr | |
3588 | 0, // rosegment_gap | |
3589 | elfcpp::SHN_UNDEF, // small_common_shndx | |
3590 | elfcpp::SHN_UNDEF, // large_common_shndx | |
3591 | 0, // small_common_section_flags | |
3592 | 0, // large_common_section_flags | |
3593 | NULL, // attributes_section | |
3594 | NULL, // attributes_vendor | |
8d9743bd MK |
3595 | "_start", // entry_symbol_name |
3596 | 32, // hash_entry_size | |
bce5a025 | 3597 | elfcpp::SHT_PROGBITS, // unwind_section_type |
053a4d68 JY |
3598 | }; |
3599 | ||
3600 | template<> | |
3601 | const Target::Target_info Target_aarch64<64, true>::aarch64_info = | |
3602 | { | |
3603 | 64, // size | |
3604 | true, // is_big_endian | |
3605 | elfcpp::EM_AARCH64, // machine_code | |
3606 | false, // has_make_symbol | |
3607 | false, // has_resolve | |
3608 | false, // has_code_fill | |
0cf44ec8 | 3609 | false, // is_default_stack_executable |
9726c3c1 | 3610 | true, // can_icf_inline_merge_sections |
053a4d68 JY |
3611 | '\0', // wrap_char |
3612 | "/lib/ld.so.1", // program interpreter | |
3613 | 0x400000, // default_text_segment_address | |
3b0357da | 3614 | 0x10000, // abi_pagesize (overridable by -z max-page-size) |
053a4d68 JY |
3615 | 0x1000, // common_pagesize (overridable by -z common-page-size) |
3616 | false, // isolate_execinstr | |
3617 | 0, // rosegment_gap | |
3618 | elfcpp::SHN_UNDEF, // small_common_shndx | |
3619 | elfcpp::SHN_UNDEF, // large_common_shndx | |
3620 | 0, // small_common_section_flags | |
3621 | 0, // large_common_section_flags | |
3622 | NULL, // attributes_section | |
3623 | NULL, // attributes_vendor | |
8d9743bd MK |
3624 | "_start", // entry_symbol_name |
3625 | 32, // hash_entry_size | |
bce5a025 | 3626 | elfcpp::SHT_PROGBITS, // unwind_section_type |
053a4d68 JY |
3627 | }; |
3628 | ||
3629 | template<> | |
3630 | const Target::Target_info Target_aarch64<32, true>::aarch64_info = | |
3631 | { | |
3632 | 32, // size | |
3633 | true, // is_big_endian | |
3634 | elfcpp::EM_AARCH64, // machine_code | |
3635 | false, // has_make_symbol | |
3636 | false, // has_resolve | |
3637 | false, // has_code_fill | |
0cf44ec8 | 3638 | false, // is_default_stack_executable |
053a4d68 JY |
3639 | false, // can_icf_inline_merge_sections |
3640 | '\0', // wrap_char | |
3641 | "/lib/ld.so.1", // program interpreter | |
3642 | 0x400000, // default_text_segment_address | |
3b0357da | 3643 | 0x10000, // abi_pagesize (overridable by -z max-page-size) |
053a4d68 JY |
3644 | 0x1000, // common_pagesize (overridable by -z common-page-size) |
3645 | false, // isolate_execinstr | |
3646 | 0, // rosegment_gap | |
3647 | elfcpp::SHN_UNDEF, // small_common_shndx | |
3648 | elfcpp::SHN_UNDEF, // large_common_shndx | |
3649 | 0, // small_common_section_flags | |
3650 | 0, // large_common_section_flags | |
3651 | NULL, // attributes_section | |
3652 | NULL, // attributes_vendor | |
8d9743bd MK |
3653 | "_start", // entry_symbol_name |
3654 | 32, // hash_entry_size | |
bce5a025 | 3655 | elfcpp::SHT_PROGBITS, // unwind_section_type |
053a4d68 JY |
3656 | }; |
3657 | ||
3658 | // Get the GOT section, creating it if necessary. | |
3659 | ||
3660 | template<int size, bool big_endian> | |
3661 | Output_data_got_aarch64<size, big_endian>* | |
3662 | Target_aarch64<size, big_endian>::got_section(Symbol_table* symtab, | |
9363c7c3 | 3663 | Layout* layout) |
053a4d68 JY |
3664 | { |
3665 | if (this->got_ == NULL) | |
3666 | { | |
3667 | gold_assert(symtab != NULL && layout != NULL); | |
3668 | ||
3669 | // When using -z now, we can treat .got.plt as a relro section. | |
3670 | // Without -z now, it is modified after program startup by lazy | |
3671 | // PLT relocations. | |
3672 | bool is_got_plt_relro = parameters->options().now(); | |
3673 | Output_section_order got_order = (is_got_plt_relro | |
3674 | ? ORDER_RELRO | |
3675 | : ORDER_RELRO_LAST); | |
3676 | Output_section_order got_plt_order = (is_got_plt_relro | |
3677 | ? ORDER_RELRO | |
3678 | : ORDER_NON_RELRO_FIRST); | |
3679 | ||
3680 | // Layout of .got and .got.plt sections. | |
3681 | // .got[0] &_DYNAMIC <-_GLOBAL_OFFSET_TABLE_ | |
3682 | // ... | |
3683 | // .gotplt[0] reserved for ld.so (&linkmap) <--DT_PLTGOT | |
3684 | // .gotplt[1] reserved for ld.so (resolver) | |
3685 | // .gotplt[2] reserved | |
3686 | ||
3687 | // Generate .got section. | |
3688 | this->got_ = new Output_data_got_aarch64<size, big_endian>(symtab, | |
9363c7c3 | 3689 | layout); |
053a4d68 | 3690 | layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, |
9363c7c3 JY |
3691 | (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), |
3692 | this->got_, got_order, true); | |
053a4d68 JY |
3693 | // The first word of GOT is reserved for the address of .dynamic. |
3694 | // We put 0 here now. The value will be replaced later in | |
3695 | // Output_data_got_aarch64::do_write. | |
3696 | this->got_->add_constant(0); | |
3697 | ||
3698 | // Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT. | |
3699 | // _GLOBAL_OFFSET_TABLE_ value points to the start of the .got section, | |
3700 | // even if there is a .got.plt section. | |
3701 | this->global_offset_table_ = | |
9363c7c3 JY |
3702 | symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, |
3703 | Symbol_table::PREDEFINED, | |
3704 | this->got_, | |
3705 | 0, 0, elfcpp::STT_OBJECT, | |
3706 | elfcpp::STB_LOCAL, | |
3707 | elfcpp::STV_HIDDEN, 0, | |
3708 | false, false); | |
053a4d68 JY |
3709 | |
3710 | // Generate .got.plt section. | |
3711 | this->got_plt_ = new Output_data_space(size / 8, "** GOT PLT"); | |
3712 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
9363c7c3 JY |
3713 | (elfcpp::SHF_ALLOC |
3714 | | elfcpp::SHF_WRITE), | |
3715 | this->got_plt_, got_plt_order, | |
3716 | is_got_plt_relro); | |
053a4d68 JY |
3717 | |
3718 | // The first three entries are reserved. | |
9363c7c3 JY |
3719 | this->got_plt_->set_current_data_size( |
3720 | AARCH64_GOTPLT_RESERVE_COUNT * (size / 8)); | |
053a4d68 | 3721 | |
3a531937 JY |
3722 | // If there are any IRELATIVE relocations, they get GOT entries |
3723 | // in .got.plt after the jump slot entries. | |
3724 | this->got_irelative_ = new Output_data_space(size / 8, | |
3725 | "** GOT IRELATIVE PLT"); | |
3726 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
3727 | (elfcpp::SHF_ALLOC | |
3728 | | elfcpp::SHF_WRITE), | |
3729 | this->got_irelative_, | |
3730 | got_plt_order, | |
3731 | is_got_plt_relro); | |
3732 | ||
3733 | // If there are any TLSDESC relocations, they get GOT entries in | |
3734 | // .got.plt after the jump slot and IRELATIVE entries. | |
3735 | this->got_tlsdesc_ = new Output_data_got<size, big_endian>(); | |
3736 | layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS, | |
3737 | (elfcpp::SHF_ALLOC | |
3738 | | elfcpp::SHF_WRITE), | |
3739 | this->got_tlsdesc_, | |
3740 | got_plt_order, | |
3741 | is_got_plt_relro); | |
3742 | ||
053a4d68 | 3743 | if (!is_got_plt_relro) |
9363c7c3 JY |
3744 | { |
3745 | // Those bytes can go into the relro segment. | |
3746 | layout->increase_relro( | |
3747 | AARCH64_GOTPLT_RESERVE_COUNT * (size / 8)); | |
3748 | } | |
053a4d68 JY |
3749 | |
3750 | } | |
3751 | return this->got_; | |
3752 | } | |
3753 | ||
3754 | // Get the dynamic reloc section, creating it if necessary. | |
3755 | ||
3756 | template<int size, bool big_endian> | |
3757 | typename Target_aarch64<size, big_endian>::Reloc_section* | |
3758 | Target_aarch64<size, big_endian>::rela_dyn_section(Layout* layout) | |
3759 | { | |
3760 | if (this->rela_dyn_ == NULL) | |
3761 | { | |
3762 | gold_assert(layout != NULL); | |
3763 | this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); | |
3764 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
3765 | elfcpp::SHF_ALLOC, this->rela_dyn_, | |
3766 | ORDER_DYNAMIC_RELOCS, false); | |
3767 | } | |
3768 | return this->rela_dyn_; | |
3769 | } | |
3770 | ||
3a531937 JY |
3771 | // Get the section to use for IRELATIVE relocs, creating it if |
3772 | // necessary. These go in .rela.dyn, but only after all other dynamic | |
3773 | // relocations. They need to follow the other dynamic relocations so | |
3774 | // that they can refer to global variables initialized by those | |
3775 | // relocs. | |
3776 | ||
3777 | template<int size, bool big_endian> | |
3778 | typename Target_aarch64<size, big_endian>::Reloc_section* | |
3779 | Target_aarch64<size, big_endian>::rela_irelative_section(Layout* layout) | |
3780 | { | |
3781 | if (this->rela_irelative_ == NULL) | |
3782 | { | |
3783 | // Make sure we have already created the dynamic reloc section. | |
3784 | this->rela_dyn_section(layout); | |
3785 | this->rela_irelative_ = new Reloc_section(false); | |
3786 | layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, | |
3787 | elfcpp::SHF_ALLOC, this->rela_irelative_, | |
3788 | ORDER_DYNAMIC_RELOCS, false); | |
3789 | gold_assert(this->rela_dyn_->output_section() | |
3790 | == this->rela_irelative_->output_section()); | |
3791 | } | |
3792 | return this->rela_irelative_; | |
3793 | } | |
3794 | ||
3795 | ||
83a01957 HS |
3796 | // do_make_elf_object to override the same function in the base class. We need |
3797 | // to use a target-specific sub-class of Sized_relobj_file<size, big_endian> to | |
3798 | // store backend specific information. Hence we need to have our own ELF object | |
3799 | // creation. | |
3800 | ||
3801 | template<int size, bool big_endian> | |
3802 | Object* | |
3803 | Target_aarch64<size, big_endian>::do_make_elf_object( | |
3804 | const std::string& name, | |
3805 | Input_file* input_file, | |
3806 | off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) | |
3807 | { | |
3808 | int et = ehdr.get_e_type(); | |
3809 | // ET_EXEC files are valid input for --just-symbols/-R, | |
3810 | // and we treat them as relocatable objects. | |
3811 | if (et == elfcpp::ET_EXEC && input_file->just_symbols()) | |
3812 | return Sized_target<size, big_endian>::do_make_elf_object( | |
3813 | name, input_file, offset, ehdr); | |
3814 | else if (et == elfcpp::ET_REL) | |
3815 | { | |
3816 | AArch64_relobj<size, big_endian>* obj = | |
3817 | new AArch64_relobj<size, big_endian>(name, input_file, offset, ehdr); | |
3818 | obj->setup(); | |
3819 | return obj; | |
3820 | } | |
3821 | else if (et == elfcpp::ET_DYN) | |
3822 | { | |
3823 | // Keep base implementation. | |
3824 | Sized_dynobj<size, big_endian>* obj = | |
3825 | new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr); | |
3826 | obj->setup(); | |
3827 | return obj; | |
3828 | } | |
3829 | else | |
3830 | { | |
3831 | gold_error(_("%s: unsupported ELF file type %d"), | |
3832 | name.c_str(), et); | |
3833 | return NULL; | |
3834 | } | |
3835 | } | |
3836 | ||
3837 | ||
3838 | // Scan a relocation for stub generation. | |
3839 | ||
3840 | template<int size, bool big_endian> | |
3841 | void | |
3842 | Target_aarch64<size, big_endian>::scan_reloc_for_stub( | |
3843 | const Relocate_info<size, big_endian>* relinfo, | |
3844 | unsigned int r_type, | |
3845 | const Sized_symbol<size>* gsym, | |
3846 | unsigned int r_sym, | |
3847 | const Symbol_value<size>* psymval, | |
3848 | typename elfcpp::Elf_types<size>::Elf_Swxword addend, | |
3849 | Address address) | |
3850 | { | |
3851 | const AArch64_relobj<size, big_endian>* aarch64_relobj = | |
3852 | static_cast<AArch64_relobj<size, big_endian>*>(relinfo->object); | |
3853 | ||
3854 | Symbol_value<size> symval; | |
3855 | if (gsym != NULL) | |
3856 | { | |
3857 | const AArch64_reloc_property* arp = aarch64_reloc_property_table-> | |
3858 | get_reloc_property(r_type); | |
3859 | if (gsym->use_plt_offset(arp->reference_flags())) | |
3860 | { | |
3861 | // This uses a PLT, change the symbol value. | |
69431bab | 3862 | symval.set_output_value(this->plt_address_for_global(gsym)); |
83a01957 HS |
3863 | psymval = &symval; |
3864 | } | |
3865 | else if (gsym->is_undefined()) | |
81b6fe3b | 3866 | { |
c092b67b EC |
3867 | // There is no need to generate a stub symbol if the original symbol |
3868 | // is undefined. | |
81b6fe3b EC |
3869 | gold_debug(DEBUG_TARGET, |
3870 | "stub: not creating a stub for undefined symbol %s in file %s", | |
3871 | gsym->name(), aarch64_relobj->name().c_str()); | |
3872 | return; | |
3873 | } | |
83a01957 HS |
3874 | } |
3875 | ||
3876 | // Get the symbol value. | |
3877 | typename Symbol_value<size>::Value value = psymval->value(aarch64_relobj, 0); | |
3878 | ||
3879 | // Owing to pipelining, the PC relative branches below actually skip | |
3880 | // two instructions when the branch offset is 0. | |
3881 | Address destination = static_cast<Address>(-1); | |
3882 | switch (r_type) | |
3883 | { | |
3884 | case elfcpp::R_AARCH64_CALL26: | |
3885 | case elfcpp::R_AARCH64_JUMP26: | |
3886 | destination = value + addend; | |
3887 | break; | |
3888 | default: | |
9726c3c1 | 3889 | gold_unreachable(); |
83a01957 HS |
3890 | } |
3891 | ||
a48d0c12 | 3892 | int stub_type = The_reloc_stub:: |
83a01957 | 3893 | stub_type_for_reloc(r_type, address, destination); |
a48d0c12 | 3894 | if (stub_type == ST_NONE) |
5019d64a | 3895 | return; |
83a01957 HS |
3896 | |
3897 | The_stub_table* stub_table = aarch64_relobj->stub_table(relinfo->data_shndx); | |
3898 | gold_assert(stub_table != NULL); | |
3899 | ||
3900 | The_reloc_stub_key key(stub_type, gsym, aarch64_relobj, r_sym, addend); | |
3901 | The_reloc_stub* stub = stub_table->find_reloc_stub(key); | |
3902 | if (stub == NULL) | |
3903 | { | |
3904 | stub = new The_reloc_stub(stub_type); | |
3905 | stub_table->add_reloc_stub(stub, key); | |
3906 | } | |
3907 | stub->set_destination_address(destination); | |
3908 | } // End of Target_aarch64::scan_reloc_for_stub | |
3909 | ||
3910 | ||
3911 | // This function scans a relocation section for stub generation. | |
3912 | // The template parameter Relocate must be a class type which provides | |
3913 | // a single function, relocate(), which implements the machine | |
3914 | // specific part of a relocation. | |
3915 | ||
3916 | // BIG_ENDIAN is the endianness of the data. SH_TYPE is the section type: | |
3917 | // SHT_REL or SHT_RELA. | |
3918 | ||
3919 | // PRELOCS points to the relocation data. RELOC_COUNT is the number | |
3920 | // of relocs. OUTPUT_SECTION is the output section. | |
3921 | // NEEDS_SPECIAL_OFFSET_HANDLING is true if input offsets need to be | |
3922 | // mapped to output offsets. | |
3923 | ||
3924 | // VIEW is the section data, VIEW_ADDRESS is its memory address, and | |
3925 | // VIEW_SIZE is the size. These refer to the input section, unless | |
3926 | // NEEDS_SPECIAL_OFFSET_HANDLING is true, in which case they refer to | |
3927 | // the output section. | |
3928 | ||
3929 | template<int size, bool big_endian> | |
3930 | template<int sh_type> | |
3931 | void inline | |
3932 | Target_aarch64<size, big_endian>::scan_reloc_section_for_stubs( | |
3933 | const Relocate_info<size, big_endian>* relinfo, | |
3934 | const unsigned char* prelocs, | |
3935 | size_t reloc_count, | |
3936 | Output_section* /*output_section*/, | |
3937 | bool /*needs_special_offset_handling*/, | |
3938 | const unsigned char* /*view*/, | |
3939 | Address view_address, | |
3940 | section_size_type) | |
3941 | { | |
3942 | typedef typename Reloc_types<sh_type,size,big_endian>::Reloc Reltype; | |
3943 | ||
3944 | const int reloc_size = | |
3945 | Reloc_types<sh_type,size,big_endian>::reloc_size; | |
3946 | AArch64_relobj<size, big_endian>* object = | |
3947 | static_cast<AArch64_relobj<size, big_endian>*>(relinfo->object); | |
3948 | unsigned int local_count = object->local_symbol_count(); | |
3949 | ||
3950 | gold::Default_comdat_behavior default_comdat_behavior; | |
3951 | Comdat_behavior comdat_behavior = CB_UNDETERMINED; | |
3952 | ||
3953 | for (size_t i = 0; i < reloc_count; ++i, prelocs += reloc_size) | |
3954 | { | |
3955 | Reltype reloc(prelocs); | |
3956 | typename elfcpp::Elf_types<size>::Elf_WXword r_info = reloc.get_r_info(); | |
3957 | unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info); | |
3958 | unsigned int r_type = elfcpp::elf_r_type<size>(r_info); | |
3959 | if (r_type != elfcpp::R_AARCH64_CALL26 | |
3960 | && r_type != elfcpp::R_AARCH64_JUMP26) | |
3961 | continue; | |
3962 | ||
3963 | section_offset_type offset = | |
3964 | convert_to_section_size_type(reloc.get_r_offset()); | |
3965 | ||
3966 | // Get the addend. | |
3967 | typename elfcpp::Elf_types<size>::Elf_Swxword addend = | |
3968 | reloc.get_r_addend(); | |
3969 | ||
3970 | const Sized_symbol<size>* sym; | |
3971 | Symbol_value<size> symval; | |
3972 | const Symbol_value<size> *psymval; | |
3973 | bool is_defined_in_discarded_section; | |
3974 | unsigned int shndx; | |
43193fe9 | 3975 | const Symbol* gsym = NULL; |
83a01957 HS |
3976 | if (r_sym < local_count) |
3977 | { | |
3978 | sym = NULL; | |
3979 | psymval = object->local_symbol(r_sym); | |
3980 | ||
3981 | // If the local symbol belongs to a section we are discarding, | |
3982 | // and that section is a debug section, try to find the | |
3983 | // corresponding kept section and map this symbol to its | |
3984 | // counterpart in the kept section. The symbol must not | |
3985 | // correspond to a section we are folding. | |
3986 | bool is_ordinary; | |
3987 | shndx = psymval->input_shndx(&is_ordinary); | |
3988 | is_defined_in_discarded_section = | |
3989 | (is_ordinary | |
3990 | && shndx != elfcpp::SHN_UNDEF | |
3991 | && !object->is_section_included(shndx) | |
3992 | && !relinfo->symtab->is_section_folded(object, shndx)); | |
3993 | ||
3994 | // We need to compute the would-be final value of this local | |
3995 | // symbol. | |
3996 | if (!is_defined_in_discarded_section) | |
3997 | { | |
3998 | typedef Sized_relobj_file<size, big_endian> ObjType; | |
0f125432 CC |
3999 | if (psymval->is_section_symbol()) |
4000 | symval.set_is_section_symbol(); | |
83a01957 HS |
4001 | typename ObjType::Compute_final_local_value_status status = |
4002 | object->compute_final_local_value(r_sym, psymval, &symval, | |
4003 | relinfo->symtab); | |
4004 | if (status == ObjType::CFLV_OK) | |
4005 | { | |
4006 | // Currently we cannot handle a branch to a target in | |
4007 | // a merged section. If this is the case, issue an error | |
4008 | // and also free the merge symbol value. | |
4009 | if (!symval.has_output_value()) | |
4010 | { | |
4011 | const std::string& section_name = | |
4012 | object->section_name(shndx); | |
4013 | object->error(_("cannot handle branch to local %u " | |
4014 | "in a merged section %s"), | |
4015 | r_sym, section_name.c_str()); | |
4016 | } | |
4017 | psymval = &symval; | |
4018 | } | |
4019 | else | |
4020 | { | |
4021 | // We cannot determine the final value. | |
4022 | continue; | |
4023 | } | |
4024 | } | |
4025 | } | |
4026 | else | |
4027 | { | |
83a01957 HS |
4028 | gsym = object->global_symbol(r_sym); |
4029 | gold_assert(gsym != NULL); | |
4030 | if (gsym->is_forwarder()) | |
4031 | gsym = relinfo->symtab->resolve_forwards(gsym); | |
4032 | ||
4033 | sym = static_cast<const Sized_symbol<size>*>(gsym); | |
4034 | if (sym->has_symtab_index() && sym->symtab_index() != -1U) | |
4035 | symval.set_output_symtab_index(sym->symtab_index()); | |
4036 | else | |
4037 | symval.set_no_output_symtab_entry(); | |
4038 | ||
4039 | // We need to compute the would-be final value of this global | |
4040 | // symbol. | |
4041 | const Symbol_table* symtab = relinfo->symtab; | |
4042 | const Sized_symbol<size>* sized_symbol = | |
4043 | symtab->get_sized_symbol<size>(gsym); | |
4044 | Symbol_table::Compute_final_value_status status; | |
4045 | typename elfcpp::Elf_types<size>::Elf_Addr value = | |
4046 | symtab->compute_final_value<size>(sized_symbol, &status); | |
4047 | ||
4048 | // Skip this if the symbol has not output section. | |
4049 | if (status == Symbol_table::CFVS_NO_OUTPUT_SECTION) | |
4050 | continue; | |
4051 | symval.set_output_value(value); | |
4052 | ||
4053 | if (gsym->type() == elfcpp::STT_TLS) | |
4054 | symval.set_is_tls_symbol(); | |
4055 | else if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
4056 | symval.set_is_ifunc_symbol(); | |
4057 | psymval = &symval; | |
4058 | ||
4059 | is_defined_in_discarded_section = | |
4060 | (gsym->is_defined_in_discarded_section() | |
4061 | && gsym->is_undefined()); | |
4062 | shndx = 0; | |
4063 | } | |
4064 | ||
4065 | Symbol_value<size> symval2; | |
4066 | if (is_defined_in_discarded_section) | |
4067 | { | |
43193fe9 CC |
4068 | std::string name = object->section_name(relinfo->data_shndx); |
4069 | ||
83a01957 | 4070 | if (comdat_behavior == CB_UNDETERMINED) |
83a01957 | 4071 | comdat_behavior = default_comdat_behavior.get(name.c_str()); |
43193fe9 | 4072 | |
83a01957 HS |
4073 | if (comdat_behavior == CB_PRETEND) |
4074 | { | |
4075 | bool found; | |
4076 | typename elfcpp::Elf_types<size>::Elf_Addr value = | |
43193fe9 | 4077 | object->map_to_kept_section(shndx, name, &found); |
83a01957 HS |
4078 | if (found) |
4079 | symval2.set_output_value(value + psymval->input_value()); | |
4080 | else | |
4081 | symval2.set_output_value(0); | |
4082 | } | |
4083 | else | |
4084 | { | |
43193fe9 CC |
4085 | if (comdat_behavior == CB_ERROR) |
4086 | issue_discarded_error(relinfo, i, offset, r_sym, gsym); | |
83a01957 HS |
4087 | symval2.set_output_value(0); |
4088 | } | |
4089 | symval2.set_no_output_symtab_entry(); | |
4090 | psymval = &symval2; | |
4091 | } | |
4092 | ||
83a01957 HS |
4093 | this->scan_reloc_for_stub(relinfo, r_type, sym, r_sym, psymval, |
4094 | addend, view_address + offset); | |
4095 | } // End of iterating relocs in a section | |
4096 | } // End of Target_aarch64::scan_reloc_section_for_stubs | |
4097 | ||
4098 | ||
4099 | // Scan an input section for stub generation. | |
4100 | ||
4101 | template<int size, bool big_endian> | |
4102 | void | |
4103 | Target_aarch64<size, big_endian>::scan_section_for_stubs( | |
4104 | const Relocate_info<size, big_endian>* relinfo, | |
4105 | unsigned int sh_type, | |
4106 | const unsigned char* prelocs, | |
4107 | size_t reloc_count, | |
4108 | Output_section* output_section, | |
4109 | bool needs_special_offset_handling, | |
4110 | const unsigned char* view, | |
4111 | Address view_address, | |
4112 | section_size_type view_size) | |
4113 | { | |
4114 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
4115 | this->scan_reloc_section_for_stubs<elfcpp::SHT_RELA>( | |
4116 | relinfo, | |
4117 | prelocs, | |
4118 | reloc_count, | |
4119 | output_section, | |
4120 | needs_special_offset_handling, | |
4121 | view, | |
4122 | view_address, | |
4123 | view_size); | |
4124 | } | |
4125 | ||
4126 | ||
df2f63a6 | 4127 | // Relocate a single reloc stub. |
83a01957 HS |
4128 | |
4129 | template<int size, bool big_endian> | |
4130 | void Target_aarch64<size, big_endian>:: | |
df2f63a6 HS |
4131 | relocate_reloc_stub(The_reloc_stub* stub, |
4132 | const The_relocate_info*, | |
4133 | Output_section*, | |
4134 | unsigned char* view, | |
4135 | Address address, | |
4136 | section_size_type) | |
83a01957 HS |
4137 | { |
4138 | typedef AArch64_relocate_functions<size, big_endian> The_reloc_functions; | |
4139 | typedef typename The_reloc_functions::Status The_reloc_functions_status; | |
4140 | typedef typename elfcpp::Swap<32,big_endian>::Valtype Insntype; | |
4141 | ||
4142 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
a48d0c12 HS |
4143 | int insn_number = stub->insn_num(); |
4144 | const uint32_t* insns = stub->insns(); | |
83a01957 HS |
4145 | // Check the insns are really those stub insns. |
4146 | for (int i = 0; i < insn_number; ++i) | |
4147 | { | |
4148 | Insntype insn = elfcpp::Swap<32,big_endian>::readval(ip + i); | |
a48d0c12 | 4149 | gold_assert(((uint32_t)insn == insns[i])); |
83a01957 HS |
4150 | } |
4151 | ||
4152 | Address dest = stub->destination_address(); | |
4153 | ||
a48d0c12 | 4154 | switch(stub->type()) |
83a01957 | 4155 | { |
a48d0c12 | 4156 | case ST_ADRP_BRANCH: |
83a01957 HS |
4157 | { |
4158 | // 1st reloc is ADR_PREL_PG_HI21 | |
4159 | The_reloc_functions_status status = | |
4160 | The_reloc_functions::adrp(view, dest, address); | |
4161 | // An error should never arise in the above step. If so, please | |
4162 | // check 'aarch64_valid_for_adrp_p'. | |
4163 | gold_assert(status == The_reloc_functions::STATUS_OKAY); | |
4164 | ||
4165 | // 2nd reloc is ADD_ABS_LO12_NC | |
4166 | const AArch64_reloc_property* arp = | |
4167 | aarch64_reloc_property_table->get_reloc_property( | |
4168 | elfcpp::R_AARCH64_ADD_ABS_LO12_NC); | |
4169 | gold_assert(arp != NULL); | |
4170 | status = The_reloc_functions::template | |
4171 | rela_general<32>(view + 4, dest, 0, arp); | |
4172 | // An error should never arise, it is an "_NC" relocation. | |
4173 | gold_assert(status == The_reloc_functions::STATUS_OKAY); | |
4174 | } | |
4175 | break; | |
4176 | ||
a48d0c12 | 4177 | case ST_LONG_BRANCH_ABS: |
83a01957 HS |
4178 | // 1st reloc is R_AARCH64_PREL64, at offset 8 |
4179 | elfcpp::Swap<64,big_endian>::writeval(view + 8, dest); | |
4180 | break; | |
4181 | ||
a48d0c12 | 4182 | case ST_LONG_BRANCH_PCREL: |
83a01957 HS |
4183 | { |
4184 | // "PC" calculation is the 2nd insn in the stub. | |
4185 | uint64_t offset = dest - (address + 4); | |
4186 | // Offset is placed at offset 4 and 5. | |
4187 | elfcpp::Swap<64,big_endian>::writeval(view + 16, offset); | |
4188 | } | |
4189 | break; | |
4190 | ||
4191 | default: | |
9726c3c1 | 4192 | gold_unreachable(); |
83a01957 HS |
4193 | } |
4194 | } | |
4195 | ||
4196 | ||
053a4d68 JY |
4197 | // A class to handle the PLT data. |
4198 | // This is an abstract base class that handles most of the linker details | |
4199 | // but does not know the actual contents of PLT entries. The derived | |
4200 | // classes below fill in those details. | |
4201 | ||
4202 | template<int size, bool big_endian> | |
4203 | class Output_data_plt_aarch64 : public Output_section_data | |
4204 | { | |
4205 | public: | |
4206 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> | |
4207 | Reloc_section; | |
4208 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
4209 | ||
4210 | Output_data_plt_aarch64(Layout* layout, | |
9363c7c3 | 4211 | uint64_t addralign, |
3a531937 JY |
4212 | Output_data_got_aarch64<size, big_endian>* got, |
4213 | Output_data_space* got_plt, | |
4214 | Output_data_space* got_irelative) | |
9726c3c1 | 4215 | : Output_section_data(addralign), tlsdesc_rel_(NULL), irelative_rel_(NULL), |
3a531937 JY |
4216 | got_(got), got_plt_(got_plt), got_irelative_(got_irelative), |
4217 | count_(0), irelative_count_(0), tlsdesc_got_offset_(-1U) | |
053a4d68 JY |
4218 | { this->init(layout); } |
4219 | ||
4220 | // Initialize the PLT section. | |
4221 | void | |
4222 | init(Layout* layout); | |
4223 | ||
4224 | // Add an entry to the PLT. | |
4225 | void | |
9726c3c1 HS |
4226 | add_entry(Symbol_table*, Layout*, Symbol* gsym); |
4227 | ||
4228 | // Add an entry to the PLT for a local STT_GNU_IFUNC symbol. | |
4229 | unsigned int | |
4230 | add_local_ifunc_entry(Symbol_table* symtab, Layout*, | |
4231 | Sized_relobj_file<size, big_endian>* relobj, | |
4232 | unsigned int local_sym_index); | |
4233 | ||
4234 | // Add the relocation for a PLT entry. | |
4235 | void | |
4236 | add_relocation(Symbol_table*, Layout*, Symbol* gsym, | |
4237 | unsigned int got_offset); | |
053a4d68 | 4238 | |
3a531937 JY |
4239 | // Add the reserved TLSDESC_PLT entry to the PLT. |
4240 | void | |
4241 | reserve_tlsdesc_entry(unsigned int got_offset) | |
4242 | { this->tlsdesc_got_offset_ = got_offset; } | |
4243 | ||
4244 | // Return true if a TLSDESC_PLT entry has been reserved. | |
4245 | bool | |
4246 | has_tlsdesc_entry() const | |
4247 | { return this->tlsdesc_got_offset_ != -1U; } | |
4248 | ||
4249 | // Return the GOT offset for the reserved TLSDESC_PLT entry. | |
4250 | unsigned int | |
4251 | get_tlsdesc_got_offset() const | |
4252 | { return this->tlsdesc_got_offset_; } | |
4253 | ||
4254 | // Return the PLT offset of the reserved TLSDESC_PLT entry. | |
4255 | unsigned int | |
4256 | get_tlsdesc_plt_offset() const | |
4257 | { | |
4258 | return (this->first_plt_entry_offset() + | |
4259 | (this->count_ + this->irelative_count_) | |
4260 | * this->get_plt_entry_size()); | |
4261 | } | |
4262 | ||
053a4d68 JY |
4263 | // Return the .rela.plt section data. |
4264 | Reloc_section* | |
4265 | rela_plt() | |
4266 | { return this->rel_; } | |
4267 | ||
3a531937 JY |
4268 | // Return where the TLSDESC relocations should go. |
4269 | Reloc_section* | |
4270 | rela_tlsdesc(Layout*); | |
4271 | ||
4272 | // Return where the IRELATIVE relocations should go in the PLT | |
4273 | // relocations. | |
4274 | Reloc_section* | |
4275 | rela_irelative(Symbol_table*, Layout*); | |
4276 | ||
9363c7c3 JY |
4277 | // Return whether we created a section for IRELATIVE relocations. |
4278 | bool | |
4279 | has_irelative_section() const | |
4280 | { return this->irelative_rel_ != NULL; } | |
4281 | ||
053a4d68 JY |
4282 | // Return the number of PLT entries. |
4283 | unsigned int | |
4284 | entry_count() const | |
3a531937 | 4285 | { return this->count_ + this->irelative_count_; } |
053a4d68 JY |
4286 | |
4287 | // Return the offset of the first non-reserved PLT entry. | |
4288 | unsigned int | |
3a531937 | 4289 | first_plt_entry_offset() const |
053a4d68 JY |
4290 | { return this->do_first_plt_entry_offset(); } |
4291 | ||
4292 | // Return the size of a PLT entry. | |
4293 | unsigned int | |
4294 | get_plt_entry_size() const | |
4295 | { return this->do_get_plt_entry_size(); } | |
4296 | ||
3a531937 JY |
4297 | // Return the reserved tlsdesc entry size. |
4298 | unsigned int | |
4299 | get_plt_tlsdesc_entry_size() const | |
4300 | { return this->do_get_plt_tlsdesc_entry_size(); } | |
4301 | ||
9363c7c3 JY |
4302 | // Return the PLT address to use for a global symbol. |
4303 | uint64_t | |
4304 | address_for_global(const Symbol*); | |
4305 | ||
4306 | // Return the PLT address to use for a local symbol. | |
4307 | uint64_t | |
4308 | address_for_local(const Relobj*, unsigned int symndx); | |
4309 | ||
053a4d68 JY |
4310 | protected: |
4311 | // Fill in the first PLT entry. | |
4312 | void | |
4313 | fill_first_plt_entry(unsigned char* pov, | |
4314 | Address got_address, | |
4315 | Address plt_address) | |
4316 | { this->do_fill_first_plt_entry(pov, got_address, plt_address); } | |
4317 | ||
4318 | // Fill in a normal PLT entry. | |
4319 | void | |
4320 | fill_plt_entry(unsigned char* pov, | |
4321 | Address got_address, | |
4322 | Address plt_address, | |
4323 | unsigned int got_offset, | |
4324 | unsigned int plt_offset) | |
4325 | { | |
4326 | this->do_fill_plt_entry(pov, got_address, plt_address, | |
4327 | got_offset, plt_offset); | |
4328 | } | |
4329 | ||
3a531937 JY |
4330 | // Fill in the reserved TLSDESC PLT entry. |
4331 | void | |
4332 | fill_tlsdesc_entry(unsigned char* pov, | |
4333 | Address gotplt_address, | |
4334 | Address plt_address, | |
4335 | Address got_base, | |
4336 | unsigned int tlsdesc_got_offset, | |
4337 | unsigned int plt_offset) | |
4338 | { | |
4339 | this->do_fill_tlsdesc_entry(pov, gotplt_address, plt_address, got_base, | |
4340 | tlsdesc_got_offset, plt_offset); | |
4341 | } | |
4342 | ||
053a4d68 JY |
4343 | virtual unsigned int |
4344 | do_first_plt_entry_offset() const = 0; | |
4345 | ||
4346 | virtual unsigned int | |
4347 | do_get_plt_entry_size() const = 0; | |
4348 | ||
3a531937 JY |
4349 | virtual unsigned int |
4350 | do_get_plt_tlsdesc_entry_size() const = 0; | |
4351 | ||
053a4d68 JY |
4352 | virtual void |
4353 | do_fill_first_plt_entry(unsigned char* pov, | |
4354 | Address got_addr, | |
4355 | Address plt_addr) = 0; | |
4356 | ||
4357 | virtual void | |
4358 | do_fill_plt_entry(unsigned char* pov, | |
4359 | Address got_address, | |
4360 | Address plt_address, | |
4361 | unsigned int got_offset, | |
4362 | unsigned int plt_offset) = 0; | |
4363 | ||
3a531937 JY |
4364 | virtual void |
4365 | do_fill_tlsdesc_entry(unsigned char* pov, | |
4366 | Address gotplt_address, | |
4367 | Address plt_address, | |
4368 | Address got_base, | |
4369 | unsigned int tlsdesc_got_offset, | |
4370 | unsigned int plt_offset) = 0; | |
4371 | ||
053a4d68 JY |
4372 | void |
4373 | do_adjust_output_section(Output_section* os); | |
4374 | ||
4375 | // Write to a map file. | |
4376 | void | |
4377 | do_print_to_mapfile(Mapfile* mapfile) const | |
4378 | { mapfile->print_output_data(this, _("** PLT")); } | |
4379 | ||
4380 | private: | |
4381 | // Set the final size. | |
4382 | void | |
4383 | set_final_data_size(); | |
4384 | ||
4385 | // Write out the PLT data. | |
4386 | void | |
4387 | do_write(Output_file*); | |
4388 | ||
4389 | // The reloc section. | |
4390 | Reloc_section* rel_; | |
3a531937 JY |
4391 | |
4392 | // The TLSDESC relocs, if necessary. These must follow the regular | |
4393 | // PLT relocs. | |
4394 | Reloc_section* tlsdesc_rel_; | |
4395 | ||
9363c7c3 JY |
4396 | // The IRELATIVE relocs, if necessary. These must follow the |
4397 | // regular PLT relocations. | |
4398 | Reloc_section* irelative_rel_; | |
3a531937 | 4399 | |
053a4d68 JY |
4400 | // The .got section. |
4401 | Output_data_got_aarch64<size, big_endian>* got_; | |
3a531937 | 4402 | |
053a4d68 JY |
4403 | // The .got.plt section. |
4404 | Output_data_space* got_plt_; | |
3a531937 JY |
4405 | |
4406 | // The part of the .got.plt section used for IRELATIVE relocs. | |
4407 | Output_data_space* got_irelative_; | |
4408 | ||
053a4d68 JY |
4409 | // The number of PLT entries. |
4410 | unsigned int count_; | |
3a531937 | 4411 | |
fa89cc82 | 4412 | // Number of PLT entries with R_AARCH64_IRELATIVE relocs. These |
3a531937 JY |
4413 | // follow the regular PLT entries. |
4414 | unsigned int irelative_count_; | |
4415 | ||
4416 | // GOT offset of the reserved TLSDESC_GOT entry for the lazy trampoline. | |
4417 | // Communicated to the loader via DT_TLSDESC_GOT. The magic value -1 | |
4418 | // indicates an offset is not allocated. | |
4419 | unsigned int tlsdesc_got_offset_; | |
053a4d68 JY |
4420 | }; |
4421 | ||
4422 | // Initialize the PLT section. | |
4423 | ||
4424 | template<int size, bool big_endian> | |
4425 | void | |
4426 | Output_data_plt_aarch64<size, big_endian>::init(Layout* layout) | |
4427 | { | |
4428 | this->rel_ = new Reloc_section(false); | |
4429 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
4430 | elfcpp::SHF_ALLOC, this->rel_, | |
4431 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
4432 | } | |
4433 | ||
4434 | template<int size, bool big_endian> | |
4435 | void | |
4436 | Output_data_plt_aarch64<size, big_endian>::do_adjust_output_section( | |
4437 | Output_section* os) | |
4438 | { | |
4439 | os->set_entsize(this->get_plt_entry_size()); | |
4440 | } | |
4441 | ||
4442 | // Add an entry to the PLT. | |
4443 | ||
4444 | template<int size, bool big_endian> | |
4445 | void | |
9726c3c1 HS |
4446 | Output_data_plt_aarch64<size, big_endian>::add_entry(Symbol_table* symtab, |
4447 | Layout* layout, Symbol* gsym) | |
053a4d68 JY |
4448 | { |
4449 | gold_assert(!gsym->has_plt_offset()); | |
9363c7c3 | 4450 | |
9726c3c1 HS |
4451 | unsigned int* pcount; |
4452 | unsigned int plt_reserved; | |
4453 | Output_section_data_build* got; | |
9363c7c3 | 4454 | |
9726c3c1 HS |
4455 | if (gsym->type() == elfcpp::STT_GNU_IFUNC |
4456 | && gsym->can_use_relative_reloc(false)) | |
4457 | { | |
4458 | pcount = &this->irelative_count_; | |
4459 | plt_reserved = 0; | |
4460 | got = this->got_irelative_; | |
4461 | } | |
4462 | else | |
4463 | { | |
4464 | pcount = &this->count_; | |
4465 | plt_reserved = this->first_plt_entry_offset(); | |
4466 | got = this->got_plt_; | |
4467 | } | |
9363c7c3 | 4468 | |
9726c3c1 HS |
4469 | gsym->set_plt_offset((*pcount) * this->get_plt_entry_size() |
4470 | + plt_reserved); | |
4471 | ||
4472 | ++*pcount; | |
4473 | ||
4474 | section_offset_type got_offset = got->current_data_size(); | |
9363c7c3 JY |
4475 | |
4476 | // Every PLT entry needs a GOT entry which points back to the PLT | |
4477 | // entry (this will be changed by the dynamic linker, normally | |
4478 | // lazily when the function is called). | |
9726c3c1 | 4479 | got->set_current_data_size(got_offset + size / 8); |
9363c7c3 JY |
4480 | |
4481 | // Every PLT entry needs a reloc. | |
9726c3c1 | 4482 | this->add_relocation(symtab, layout, gsym, got_offset); |
9363c7c3 JY |
4483 | |
4484 | // Note that we don't need to save the symbol. The contents of the | |
4485 | // PLT are independent of which symbols are used. The symbols only | |
4486 | // appear in the relocations. | |
4487 | } | |
4488 | ||
9726c3c1 HS |
4489 | // Add an entry to the PLT for a local STT_GNU_IFUNC symbol. Return |
4490 | // the PLT offset. | |
4491 | ||
4492 | template<int size, bool big_endian> | |
4493 | unsigned int | |
4494 | Output_data_plt_aarch64<size, big_endian>::add_local_ifunc_entry( | |
4495 | Symbol_table* symtab, | |
4496 | Layout* layout, | |
4497 | Sized_relobj_file<size, big_endian>* relobj, | |
4498 | unsigned int local_sym_index) | |
4499 | { | |
4500 | unsigned int plt_offset = this->irelative_count_ * this->get_plt_entry_size(); | |
4501 | ++this->irelative_count_; | |
4502 | ||
4503 | section_offset_type got_offset = this->got_irelative_->current_data_size(); | |
4504 | ||
4505 | // Every PLT entry needs a GOT entry which points back to the PLT | |
4506 | // entry. | |
4507 | this->got_irelative_->set_current_data_size(got_offset + size / 8); | |
4508 | ||
4509 | // Every PLT entry needs a reloc. | |
4510 | Reloc_section* rela = this->rela_irelative(symtab, layout); | |
4511 | rela->add_symbolless_local_addend(relobj, local_sym_index, | |
4512 | elfcpp::R_AARCH64_IRELATIVE, | |
4513 | this->got_irelative_, got_offset, 0); | |
4514 | ||
4515 | return plt_offset; | |
4516 | } | |
4517 | ||
4518 | // Add the relocation for a PLT entry. | |
4519 | ||
4520 | template<int size, bool big_endian> | |
4521 | void | |
4522 | Output_data_plt_aarch64<size, big_endian>::add_relocation( | |
4523 | Symbol_table* symtab, Layout* layout, Symbol* gsym, unsigned int got_offset) | |
4524 | { | |
4525 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
4526 | && gsym->can_use_relative_reloc(false)) | |
4527 | { | |
4528 | Reloc_section* rela = this->rela_irelative(symtab, layout); | |
4529 | rela->add_symbolless_global_addend(gsym, elfcpp::R_AARCH64_IRELATIVE, | |
4530 | this->got_irelative_, got_offset, 0); | |
4531 | } | |
4532 | else | |
4533 | { | |
4534 | gsym->set_needs_dynsym_entry(); | |
4535 | this->rel_->add_global(gsym, elfcpp::R_AARCH64_JUMP_SLOT, this->got_plt_, | |
4536 | got_offset, 0); | |
4537 | } | |
4538 | } | |
4539 | ||
3a531937 JY |
4540 | // Return where the TLSDESC relocations should go, creating it if |
4541 | // necessary. These follow the JUMP_SLOT relocations. | |
4542 | ||
4543 | template<int size, bool big_endian> | |
4544 | typename Output_data_plt_aarch64<size, big_endian>::Reloc_section* | |
4545 | Output_data_plt_aarch64<size, big_endian>::rela_tlsdesc(Layout* layout) | |
4546 | { | |
4547 | if (this->tlsdesc_rel_ == NULL) | |
4548 | { | |
4549 | this->tlsdesc_rel_ = new Reloc_section(false); | |
4550 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
4551 | elfcpp::SHF_ALLOC, this->tlsdesc_rel_, | |
4552 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
4553 | gold_assert(this->tlsdesc_rel_->output_section() | |
4554 | == this->rel_->output_section()); | |
4555 | } | |
4556 | return this->tlsdesc_rel_; | |
4557 | } | |
4558 | ||
4559 | // Return where the IRELATIVE relocations should go in the PLT. These | |
4560 | // follow the JUMP_SLOT and the TLSDESC relocations. | |
4561 | ||
4562 | template<int size, bool big_endian> | |
4563 | typename Output_data_plt_aarch64<size, big_endian>::Reloc_section* | |
4564 | Output_data_plt_aarch64<size, big_endian>::rela_irelative(Symbol_table* symtab, | |
4565 | Layout* layout) | |
4566 | { | |
4567 | if (this->irelative_rel_ == NULL) | |
4568 | { | |
4569 | // Make sure we have a place for the TLSDESC relocations, in | |
4570 | // case we see any later on. | |
4571 | this->rela_tlsdesc(layout); | |
4572 | this->irelative_rel_ = new Reloc_section(false); | |
4573 | layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, | |
4574 | elfcpp::SHF_ALLOC, this->irelative_rel_, | |
4575 | ORDER_DYNAMIC_PLT_RELOCS, false); | |
4576 | gold_assert(this->irelative_rel_->output_section() | |
4577 | == this->rel_->output_section()); | |
4578 | ||
4579 | if (parameters->doing_static_link()) | |
4580 | { | |
4581 | // A statically linked executable will only have a .rela.plt | |
4582 | // section to hold R_AARCH64_IRELATIVE relocs for | |
4583 | // STT_GNU_IFUNC symbols. The library will use these | |
4584 | // symbols to locate the IRELATIVE relocs at program startup | |
4585 | // time. | |
4586 | symtab->define_in_output_data("__rela_iplt_start", NULL, | |
4587 | Symbol_table::PREDEFINED, | |
4588 | this->irelative_rel_, 0, 0, | |
4589 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
4590 | elfcpp::STV_HIDDEN, 0, false, true); | |
4591 | symtab->define_in_output_data("__rela_iplt_end", NULL, | |
4592 | Symbol_table::PREDEFINED, | |
4593 | this->irelative_rel_, 0, 0, | |
4594 | elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, | |
4595 | elfcpp::STV_HIDDEN, 0, true, true); | |
4596 | } | |
4597 | } | |
4598 | return this->irelative_rel_; | |
4599 | } | |
4600 | ||
9363c7c3 JY |
4601 | // Return the PLT address to use for a global symbol. |
4602 | ||
4603 | template<int size, bool big_endian> | |
4604 | uint64_t | |
4605 | Output_data_plt_aarch64<size, big_endian>::address_for_global( | |
4606 | const Symbol* gsym) | |
4607 | { | |
4608 | uint64_t offset = 0; | |
4609 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
4610 | && gsym->can_use_relative_reloc(false)) | |
4611 | offset = (this->first_plt_entry_offset() + | |
4612 | this->count_ * this->get_plt_entry_size()); | |
4613 | return this->address() + offset + gsym->plt_offset(); | |
4614 | } | |
4615 | ||
4616 | // Return the PLT address to use for a local symbol. These are always | |
4617 | // IRELATIVE relocs. | |
4618 | ||
4619 | template<int size, bool big_endian> | |
4620 | uint64_t | |
4621 | Output_data_plt_aarch64<size, big_endian>::address_for_local( | |
4622 | const Relobj* object, | |
4623 | unsigned int r_sym) | |
4624 | { | |
4625 | return (this->address() | |
4626 | + this->first_plt_entry_offset() | |
4627 | + this->count_ * this->get_plt_entry_size() | |
4628 | + object->local_plt_offset(r_sym)); | |
053a4d68 JY |
4629 | } |
4630 | ||
4631 | // Set the final size. | |
9363c7c3 | 4632 | |
053a4d68 JY |
4633 | template<int size, bool big_endian> |
4634 | void | |
4635 | Output_data_plt_aarch64<size, big_endian>::set_final_data_size() | |
4636 | { | |
3a531937 JY |
4637 | unsigned int count = this->count_ + this->irelative_count_; |
4638 | unsigned int extra_size = 0; | |
4639 | if (this->has_tlsdesc_entry()) | |
4640 | extra_size += this->get_plt_tlsdesc_entry_size(); | |
053a4d68 | 4641 | this->set_data_size(this->first_plt_entry_offset() |
3a531937 JY |
4642 | + count * this->get_plt_entry_size() |
4643 | + extra_size); | |
053a4d68 JY |
4644 | } |
4645 | ||
4646 | template<int size, bool big_endian> | |
4647 | class Output_data_plt_aarch64_standard : | |
4648 | public Output_data_plt_aarch64<size, big_endian> | |
4649 | { | |
4650 | public: | |
4651 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
3a531937 JY |
4652 | Output_data_plt_aarch64_standard( |
4653 | Layout* layout, | |
4654 | Output_data_got_aarch64<size, big_endian>* got, | |
4655 | Output_data_space* got_plt, | |
4656 | Output_data_space* got_irelative) | |
053a4d68 | 4657 | : Output_data_plt_aarch64<size, big_endian>(layout, |
9363c7c3 | 4658 | size == 32 ? 4 : 8, |
3a531937 JY |
4659 | got, got_plt, |
4660 | got_irelative) | |
053a4d68 JY |
4661 | { } |
4662 | ||
4663 | protected: | |
4664 | // Return the offset of the first non-reserved PLT entry. | |
4665 | virtual unsigned int | |
4666 | do_first_plt_entry_offset() const | |
4667 | { return this->first_plt_entry_size; } | |
4668 | ||
4669 | // Return the size of a PLT entry | |
4670 | virtual unsigned int | |
4671 | do_get_plt_entry_size() const | |
4672 | { return this->plt_entry_size; } | |
4673 | ||
3a531937 JY |
4674 | // Return the size of a tlsdesc entry |
4675 | virtual unsigned int | |
4676 | do_get_plt_tlsdesc_entry_size() const | |
4677 | { return this->plt_tlsdesc_entry_size; } | |
4678 | ||
053a4d68 JY |
4679 | virtual void |
4680 | do_fill_first_plt_entry(unsigned char* pov, | |
9363c7c3 JY |
4681 | Address got_address, |
4682 | Address plt_address); | |
053a4d68 JY |
4683 | |
4684 | virtual void | |
4685 | do_fill_plt_entry(unsigned char* pov, | |
9363c7c3 JY |
4686 | Address got_address, |
4687 | Address plt_address, | |
4688 | unsigned int got_offset, | |
4689 | unsigned int plt_offset); | |
053a4d68 | 4690 | |
3a531937 JY |
4691 | virtual void |
4692 | do_fill_tlsdesc_entry(unsigned char* pov, | |
4693 | Address gotplt_address, | |
4694 | Address plt_address, | |
4695 | Address got_base, | |
4696 | unsigned int tlsdesc_got_offset, | |
4697 | unsigned int plt_offset); | |
4698 | ||
053a4d68 JY |
4699 | private: |
4700 | // The size of the first plt entry size. | |
4701 | static const int first_plt_entry_size = 32; | |
4702 | // The size of the plt entry size. | |
4703 | static const int plt_entry_size = 16; | |
3a531937 JY |
4704 | // The size of the plt tlsdesc entry size. |
4705 | static const int plt_tlsdesc_entry_size = 32; | |
053a4d68 JY |
4706 | // Template for the first PLT entry. |
4707 | static const uint32_t first_plt_entry[first_plt_entry_size / 4]; | |
4708 | // Template for subsequent PLT entries. | |
4709 | static const uint32_t plt_entry[plt_entry_size / 4]; | |
3a531937 JY |
4710 | // The reserved TLSDESC entry in the PLT for an executable. |
4711 | static const uint32_t tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4]; | |
053a4d68 JY |
4712 | }; |
4713 | ||
4714 | // The first entry in the PLT for an executable. | |
4715 | ||
4716 | template<> | |
4717 | const uint32_t | |
4718 | Output_data_plt_aarch64_standard<32, false>:: | |
4719 | first_plt_entry[first_plt_entry_size / 4] = | |
4720 | { | |
4721 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
4722 | 0x90000010, /* adrp x16, PLT_GOT+0x8 */ | |
4723 | 0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */ | |
4724 | 0x11002210, /* add w16, w16,#PLT_GOT+0x8 */ | |
4725 | 0xd61f0220, /* br x17 */ | |
4726 | 0xd503201f, /* nop */ | |
4727 | 0xd503201f, /* nop */ | |
4728 | 0xd503201f, /* nop */ | |
4729 | }; | |
4730 | ||
83a01957 | 4731 | |
053a4d68 JY |
4732 | template<> |
4733 | const uint32_t | |
4734 | Output_data_plt_aarch64_standard<32, true>:: | |
4735 | first_plt_entry[first_plt_entry_size / 4] = | |
4736 | { | |
4737 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
4738 | 0x90000010, /* adrp x16, PLT_GOT+0x8 */ | |
4739 | 0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */ | |
4740 | 0x11002210, /* add w16, w16,#PLT_GOT+0x8 */ | |
4741 | 0xd61f0220, /* br x17 */ | |
4742 | 0xd503201f, /* nop */ | |
4743 | 0xd503201f, /* nop */ | |
4744 | 0xd503201f, /* nop */ | |
4745 | }; | |
4746 | ||
83a01957 | 4747 | |
053a4d68 JY |
4748 | template<> |
4749 | const uint32_t | |
4750 | Output_data_plt_aarch64_standard<64, false>:: | |
4751 | first_plt_entry[first_plt_entry_size / 4] = | |
4752 | { | |
4753 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
4754 | 0x90000010, /* adrp x16, PLT_GOT+16 */ | |
4755 | 0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */ | |
4756 | 0x91004210, /* add x16, x16,#PLT_GOT+0x10 */ | |
4757 | 0xd61f0220, /* br x17 */ | |
4758 | 0xd503201f, /* nop */ | |
4759 | 0xd503201f, /* nop */ | |
4760 | 0xd503201f, /* nop */ | |
4761 | }; | |
4762 | ||
83a01957 | 4763 | |
053a4d68 JY |
4764 | template<> |
4765 | const uint32_t | |
4766 | Output_data_plt_aarch64_standard<64, true>:: | |
4767 | first_plt_entry[first_plt_entry_size / 4] = | |
4768 | { | |
4769 | 0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */ | |
4770 | 0x90000010, /* adrp x16, PLT_GOT+16 */ | |
4771 | 0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */ | |
4772 | 0x91004210, /* add x16, x16,#PLT_GOT+0x10 */ | |
4773 | 0xd61f0220, /* br x17 */ | |
4774 | 0xd503201f, /* nop */ | |
4775 | 0xd503201f, /* nop */ | |
4776 | 0xd503201f, /* nop */ | |
4777 | }; | |
4778 | ||
83a01957 | 4779 | |
053a4d68 JY |
4780 | template<> |
4781 | const uint32_t | |
4782 | Output_data_plt_aarch64_standard<32, false>:: | |
4783 | plt_entry[plt_entry_size / 4] = | |
4784 | { | |
4785 | 0x90000010, /* adrp x16, PLTGOT + n * 4 */ | |
4786 | 0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */ | |
4787 | 0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
4788 | 0xd61f0220, /* br x17. */ | |
4789 | }; | |
4790 | ||
83a01957 | 4791 | |
053a4d68 JY |
4792 | template<> |
4793 | const uint32_t | |
4794 | Output_data_plt_aarch64_standard<32, true>:: | |
4795 | plt_entry[plt_entry_size / 4] = | |
4796 | { | |
4797 | 0x90000010, /* adrp x16, PLTGOT + n * 4 */ | |
4798 | 0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */ | |
4799 | 0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */ | |
4800 | 0xd61f0220, /* br x17. */ | |
4801 | }; | |
4802 | ||
83a01957 | 4803 | |
053a4d68 JY |
4804 | template<> |
4805 | const uint32_t | |
4806 | Output_data_plt_aarch64_standard<64, false>:: | |
4807 | plt_entry[plt_entry_size / 4] = | |
4808 | { | |
4809 | 0x90000010, /* adrp x16, PLTGOT + n * 8 */ | |
4810 | 0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
4811 | 0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
4812 | 0xd61f0220, /* br x17. */ | |
4813 | }; | |
4814 | ||
83a01957 | 4815 | |
053a4d68 JY |
4816 | template<> |
4817 | const uint32_t | |
4818 | Output_data_plt_aarch64_standard<64, true>:: | |
4819 | plt_entry[plt_entry_size / 4] = | |
4820 | { | |
4821 | 0x90000010, /* adrp x16, PLTGOT + n * 8 */ | |
4822 | 0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */ | |
4823 | 0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */ | |
4824 | 0xd61f0220, /* br x17. */ | |
4825 | }; | |
4826 | ||
83a01957 | 4827 | |
053a4d68 JY |
4828 | template<int size, bool big_endian> |
4829 | void | |
4830 | Output_data_plt_aarch64_standard<size, big_endian>::do_fill_first_plt_entry( | |
4831 | unsigned char* pov, | |
9363c7c3 JY |
4832 | Address got_address, |
4833 | Address plt_address) | |
053a4d68 JY |
4834 | { |
4835 | // PLT0 of the small PLT looks like this in ELF64 - | |
4836 | // stp x16, x30, [sp, #-16]! Save the reloc and lr on stack. | |
4837 | // adrp x16, PLT_GOT + 16 Get the page base of the GOTPLT | |
4838 | // ldr x17, [x16, #:lo12:PLT_GOT+16] Load the address of the | |
4839 | // symbol resolver | |
4840 | // add x16, x16, #:lo12:PLT_GOT+16 Load the lo12 bits of the | |
4841 | // GOTPLT entry for this. | |
4842 | // br x17 | |
4843 | // PLT0 will be slightly different in ELF32 due to different got entry | |
4844 | // size. | |
4845 | memcpy(pov, this->first_plt_entry, this->first_plt_entry_size); | |
9363c7c3 JY |
4846 | Address gotplt_2nd_ent = got_address + (size / 8) * 2; |
4847 | ||
4848 | // Fill in the top 21 bits for this: ADRP x16, PLT_GOT + 8 * 2. | |
4849 | // ADRP: (PG(S+A)-PG(P)) >> 12) & 0x1fffff. | |
4850 | // FIXME: This only works for 64bit | |
4851 | AArch64_relocate_functions<size, big_endian>::adrp(pov + 4, | |
4852 | gotplt_2nd_ent, plt_address + 4); | |
4853 | ||
4854 | // Fill in R_AARCH64_LDST8_LO12 | |
4855 | elfcpp::Swap<32, big_endian>::writeval( | |
4856 | pov + 8, | |
4857 | ((this->first_plt_entry[2] & 0xffc003ff) | |
4858 | | ((gotplt_2nd_ent & 0xff8) << 7))); | |
4859 | ||
4860 | // Fill in R_AARCH64_ADD_ABS_LO12 | |
4861 | elfcpp::Swap<32, big_endian>::writeval( | |
4862 | pov + 12, | |
4863 | ((this->first_plt_entry[3] & 0xffc003ff) | |
4864 | | ((gotplt_2nd_ent & 0xfff) << 10))); | |
053a4d68 JY |
4865 | } |
4866 | ||
83a01957 | 4867 | |
053a4d68 | 4868 | // Subsequent entries in the PLT for an executable. |
9363c7c3 | 4869 | // FIXME: This only works for 64bit |
053a4d68 JY |
4870 | |
4871 | template<int size, bool big_endian> | |
4872 | void | |
4873 | Output_data_plt_aarch64_standard<size, big_endian>::do_fill_plt_entry( | |
4874 | unsigned char* pov, | |
9363c7c3 JY |
4875 | Address got_address, |
4876 | Address plt_address, | |
4877 | unsigned int got_offset, | |
4878 | unsigned int plt_offset) | |
053a4d68 JY |
4879 | { |
4880 | memcpy(pov, this->plt_entry, this->plt_entry_size); | |
9363c7c3 JY |
4881 | |
4882 | Address gotplt_entry_address = got_address + got_offset; | |
4883 | Address plt_entry_address = plt_address + plt_offset; | |
4884 | ||
4885 | // Fill in R_AARCH64_PCREL_ADR_HI21 | |
4886 | AArch64_relocate_functions<size, big_endian>::adrp( | |
4887 | pov, | |
4888 | gotplt_entry_address, | |
4889 | plt_entry_address); | |
4890 | ||
4891 | // Fill in R_AARCH64_LDST64_ABS_LO12 | |
4892 | elfcpp::Swap<32, big_endian>::writeval( | |
4893 | pov + 4, | |
4894 | ((this->plt_entry[1] & 0xffc003ff) | |
4895 | | ((gotplt_entry_address & 0xff8) << 7))); | |
4896 | ||
4897 | // Fill in R_AARCH64_ADD_ABS_LO12 | |
4898 | elfcpp::Swap<32, big_endian>::writeval( | |
4899 | pov + 8, | |
4900 | ((this->plt_entry[2] & 0xffc003ff) | |
4901 | | ((gotplt_entry_address & 0xfff) <<10))); | |
4902 | ||
053a4d68 JY |
4903 | } |
4904 | ||
3a531937 JY |
4905 | |
4906 | template<> | |
4907 | const uint32_t | |
4908 | Output_data_plt_aarch64_standard<32, false>:: | |
4909 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
4910 | { | |
4911 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
4912 | 0x90000002, /* adrp x2, 0 */ | |
4913 | 0x90000003, /* adrp x3, 0 */ | |
4914 | 0xb9400042, /* ldr w2, [w2, #0] */ | |
4915 | 0x11000063, /* add w3, w3, 0 */ | |
4916 | 0xd61f0040, /* br x2 */ | |
4917 | 0xd503201f, /* nop */ | |
4918 | 0xd503201f, /* nop */ | |
4919 | }; | |
4920 | ||
4921 | template<> | |
4922 | const uint32_t | |
4923 | Output_data_plt_aarch64_standard<32, true>:: | |
4924 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
4925 | { | |
4926 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
4927 | 0x90000002, /* adrp x2, 0 */ | |
4928 | 0x90000003, /* adrp x3, 0 */ | |
4929 | 0xb9400042, /* ldr w2, [w2, #0] */ | |
4930 | 0x11000063, /* add w3, w3, 0 */ | |
4931 | 0xd61f0040, /* br x2 */ | |
4932 | 0xd503201f, /* nop */ | |
4933 | 0xd503201f, /* nop */ | |
4934 | }; | |
4935 | ||
4936 | template<> | |
4937 | const uint32_t | |
4938 | Output_data_plt_aarch64_standard<64, false>:: | |
4939 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
4940 | { | |
4941 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
4942 | 0x90000002, /* adrp x2, 0 */ | |
4943 | 0x90000003, /* adrp x3, 0 */ | |
4944 | 0xf9400042, /* ldr x2, [x2, #0] */ | |
4945 | 0x91000063, /* add x3, x3, 0 */ | |
4946 | 0xd61f0040, /* br x2 */ | |
4947 | 0xd503201f, /* nop */ | |
4948 | 0xd503201f, /* nop */ | |
4949 | }; | |
4950 | ||
4951 | template<> | |
4952 | const uint32_t | |
4953 | Output_data_plt_aarch64_standard<64, true>:: | |
4954 | tlsdesc_plt_entry[plt_tlsdesc_entry_size / 4] = | |
4955 | { | |
4956 | 0xa9bf0fe2, /* stp x2, x3, [sp, #-16]! */ | |
4957 | 0x90000002, /* adrp x2, 0 */ | |
4958 | 0x90000003, /* adrp x3, 0 */ | |
4959 | 0xf9400042, /* ldr x2, [x2, #0] */ | |
4960 | 0x91000063, /* add x3, x3, 0 */ | |
4961 | 0xd61f0040, /* br x2 */ | |
4962 | 0xd503201f, /* nop */ | |
4963 | 0xd503201f, /* nop */ | |
4964 | }; | |
4965 | ||
4966 | template<int size, bool big_endian> | |
4967 | void | |
4968 | Output_data_plt_aarch64_standard<size, big_endian>::do_fill_tlsdesc_entry( | |
4969 | unsigned char* pov, | |
4970 | Address gotplt_address, | |
4971 | Address plt_address, | |
4972 | Address got_base, | |
4973 | unsigned int tlsdesc_got_offset, | |
4974 | unsigned int plt_offset) | |
4975 | { | |
4976 | memcpy(pov, tlsdesc_plt_entry, plt_tlsdesc_entry_size); | |
4977 | ||
4978 | // move DT_TLSDESC_GOT address into x2 | |
4979 | // move .got.plt address into x3 | |
4980 | Address tlsdesc_got_entry = got_base + tlsdesc_got_offset; | |
4981 | Address plt_entry_address = plt_address + plt_offset; | |
4982 | ||
4983 | // R_AARCH64_ADR_PREL_PG_HI21 | |
4984 | AArch64_relocate_functions<size, big_endian>::adrp( | |
4985 | pov + 4, | |
4986 | tlsdesc_got_entry, | |
4987 | plt_entry_address + 4); | |
4988 | ||
4989 | // R_AARCH64_ADR_PREL_PG_HI21 | |
4990 | AArch64_relocate_functions<size, big_endian>::adrp( | |
4991 | pov + 8, | |
4992 | gotplt_address, | |
4993 | plt_entry_address + 8); | |
4994 | ||
4995 | // R_AARCH64_LDST64_ABS_LO12 | |
4996 | elfcpp::Swap<32, big_endian>::writeval( | |
4997 | pov + 12, | |
4998 | ((this->tlsdesc_plt_entry[3] & 0xffc003ff) | |
4999 | | ((tlsdesc_got_entry & 0xff8) << 7))); | |
5000 | ||
5001 | // R_AARCH64_ADD_ABS_LO12 | |
5002 | elfcpp::Swap<32, big_endian>::writeval( | |
5003 | pov + 16, | |
5004 | ((this->tlsdesc_plt_entry[4] & 0xffc003ff) | |
5005 | | ((gotplt_address & 0xfff) << 10))); | |
5006 | } | |
5007 | ||
053a4d68 JY |
5008 | // Write out the PLT. This uses the hand-coded instructions above, |
5009 | // and adjusts them as needed. This is specified by the AMD64 ABI. | |
5010 | ||
5011 | template<int size, bool big_endian> | |
5012 | void | |
5013 | Output_data_plt_aarch64<size, big_endian>::do_write(Output_file* of) | |
5014 | { | |
5015 | const off_t offset = this->offset(); | |
5016 | const section_size_type oview_size = | |
5017 | convert_to_section_size_type(this->data_size()); | |
5018 | unsigned char* const oview = of->get_output_view(offset, oview_size); | |
5019 | ||
5020 | const off_t got_file_offset = this->got_plt_->offset(); | |
9726c3c1 HS |
5021 | gold_assert(got_file_offset + this->got_plt_->data_size() |
5022 | == this->got_irelative_->offset()); | |
5023 | ||
053a4d68 | 5024 | const section_size_type got_size = |
9726c3c1 HS |
5025 | convert_to_section_size_type(this->got_plt_->data_size() |
5026 | + this->got_irelative_->data_size()); | |
053a4d68 JY |
5027 | unsigned char* const got_view = of->get_output_view(got_file_offset, |
5028 | got_size); | |
5029 | ||
5030 | unsigned char* pov = oview; | |
5031 | ||
5032 | // The base address of the .plt section. | |
5033 | typename elfcpp::Elf_types<size>::Elf_Addr plt_address = this->address(); | |
053a4d68 | 5034 | // The base address of the PLT portion of the .got section. |
3a531937 JY |
5035 | typename elfcpp::Elf_types<size>::Elf_Addr gotplt_address |
5036 | = this->got_plt_->address(); | |
053a4d68 | 5037 | |
3a531937 | 5038 | this->fill_first_plt_entry(pov, gotplt_address, plt_address); |
053a4d68 JY |
5039 | pov += this->first_plt_entry_offset(); |
5040 | ||
5041 | // The first three entries in .got.plt are reserved. | |
5042 | unsigned char* got_pov = got_view; | |
5043 | memset(got_pov, 0, size / 8 * AARCH64_GOTPLT_RESERVE_COUNT); | |
5044 | got_pov += (size / 8) * AARCH64_GOTPLT_RESERVE_COUNT; | |
5045 | ||
5046 | unsigned int plt_offset = this->first_plt_entry_offset(); | |
5047 | unsigned int got_offset = (size / 8) * AARCH64_GOTPLT_RESERVE_COUNT; | |
3a531937 | 5048 | const unsigned int count = this->count_ + this->irelative_count_; |
053a4d68 JY |
5049 | for (unsigned int plt_index = 0; |
5050 | plt_index < count; | |
5051 | ++plt_index, | |
5052 | pov += this->get_plt_entry_size(), | |
5053 | got_pov += size / 8, | |
5054 | plt_offset += this->get_plt_entry_size(), | |
5055 | got_offset += size / 8) | |
5056 | { | |
5057 | // Set and adjust the PLT entry itself. | |
3a531937 | 5058 | this->fill_plt_entry(pov, gotplt_address, plt_address, |
9363c7c3 | 5059 | got_offset, plt_offset); |
053a4d68 | 5060 | |
9363c7c3 JY |
5061 | // Set the entry in the GOT, which points to plt0. |
5062 | elfcpp::Swap<size, big_endian>::writeval(got_pov, plt_address); | |
053a4d68 JY |
5063 | } |
5064 | ||
3a531937 JY |
5065 | if (this->has_tlsdesc_entry()) |
5066 | { | |
5067 | // Set and adjust the reserved TLSDESC PLT entry. | |
5068 | unsigned int tlsdesc_got_offset = this->get_tlsdesc_got_offset(); | |
5069 | // The base address of the .base section. | |
5070 | typename elfcpp::Elf_types<size>::Elf_Addr got_base = | |
5071 | this->got_->address(); | |
5072 | this->fill_tlsdesc_entry(pov, gotplt_address, plt_address, got_base, | |
5073 | tlsdesc_got_offset, plt_offset); | |
5074 | pov += this->get_plt_tlsdesc_entry_size(); | |
5075 | } | |
5076 | ||
053a4d68 JY |
5077 | gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
5078 | gold_assert(static_cast<section_size_type>(got_pov - got_view) == got_size); | |
5079 | ||
5080 | of->write_output_view(offset, oview_size, oview); | |
5081 | of->write_output_view(got_file_offset, got_size, got_view); | |
5082 | } | |
5083 | ||
9363c7c3 JY |
5084 | // Telling how to update the immediate field of an instruction. |
5085 | struct AArch64_howto | |
5086 | { | |
5087 | // The immediate field mask. | |
5088 | elfcpp::Elf_Xword dst_mask; | |
5089 | ||
5090 | // The offset to apply relocation immediate | |
5091 | int doffset; | |
5092 | ||
5093 | // The second part offset, if the immediate field has two parts. | |
5094 | // -1 if the immediate field has only one part. | |
5095 | int doffset2; | |
5096 | }; | |
5097 | ||
5098 | static const AArch64_howto aarch64_howto[AArch64_reloc_property::INST_NUM] = | |
5099 | { | |
5100 | {0, -1, -1}, // DATA | |
5101 | {0x1fffe0, 5, -1}, // MOVW [20:5]-imm16 | |
5102 | {0xffffe0, 5, -1}, // LD [23:5]-imm19 | |
5103 | {0x60ffffe0, 29, 5}, // ADR [30:29]-immlo [23:5]-immhi | |
5104 | {0x60ffffe0, 29, 5}, // ADRP [30:29]-immlo [23:5]-immhi | |
5105 | {0x3ffc00, 10, -1}, // ADD [21:10]-imm12 | |
5106 | {0x3ffc00, 10, -1}, // LDST [21:10]-imm12 | |
5107 | {0x7ffe0, 5, -1}, // TBZNZ [18:5]-imm14 | |
5108 | {0xffffe0, 5, -1}, // CONDB [23:5]-imm19 | |
5109 | {0x3ffffff, 0, -1}, // B [25:0]-imm26 | |
5110 | {0x3ffffff, 0, -1}, // CALL [25:0]-imm26 | |
5111 | }; | |
5112 | ||
5113 | // AArch64 relocate function class | |
5114 | ||
5115 | template<int size, bool big_endian> | |
5116 | class AArch64_relocate_functions | |
5117 | { | |
5118 | public: | |
5119 | typedef enum | |
5120 | { | |
5121 | STATUS_OKAY, // No error during relocation. | |
5122 | STATUS_OVERFLOW, // Relocation overflow. | |
5123 | STATUS_BAD_RELOC, // Relocation cannot be applied. | |
5124 | } Status; | |
5125 | ||
9363c7c3 JY |
5126 | typedef AArch64_relocate_functions<size, big_endian> This; |
5127 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; | |
83a01957 HS |
5128 | typedef Relocate_info<size, big_endian> The_relocate_info; |
5129 | typedef AArch64_relobj<size, big_endian> The_aarch64_relobj; | |
5130 | typedef Reloc_stub<size, big_endian> The_reloc_stub; | |
83a01957 HS |
5131 | typedef Stub_table<size, big_endian> The_stub_table; |
5132 | typedef elfcpp::Rela<size, big_endian> The_rela; | |
9726c3c1 | 5133 | typedef typename elfcpp::Swap<size, big_endian>::Valtype AArch64_valtype; |
9363c7c3 JY |
5134 | |
5135 | // Return the page address of the address. | |
5136 | // Page(address) = address & ~0xFFF | |
5137 | ||
9726c3c1 | 5138 | static inline AArch64_valtype |
9363c7c3 JY |
5139 | Page(Address address) |
5140 | { | |
5141 | return (address & (~static_cast<Address>(0xFFF))); | |
5142 | } | |
5143 | ||
83a01957 | 5144 | private: |
9363c7c3 JY |
5145 | // Update instruction (pointed by view) with selected bits (immed). |
5146 | // val = (val & ~dst_mask) | (immed << doffset) | |
5147 | ||
5148 | template<int valsize> | |
5149 | static inline void | |
5150 | update_view(unsigned char* view, | |
9726c3c1 | 5151 | AArch64_valtype immed, |
9363c7c3 JY |
5152 | elfcpp::Elf_Xword doffset, |
5153 | elfcpp::Elf_Xword dst_mask) | |
5154 | { | |
5155 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
5156 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
5157 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
5158 | ||
5159 | // Clear immediate fields. | |
5160 | val &= ~dst_mask; | |
5161 | elfcpp::Swap<valsize, big_endian>::writeval(wv, | |
5162 | static_cast<Valtype>(val | (immed << doffset))); | |
5163 | } | |
5164 | ||
5165 | // Update two parts of an instruction (pointed by view) with selected | |
5166 | // bits (immed1 and immed2). | |
5167 | // val = (val & ~dst_mask) | (immed1 << doffset1) | (immed2 << doffset2) | |
5168 | ||
5169 | template<int valsize> | |
5170 | static inline void | |
5171 | update_view_two_parts( | |
5172 | unsigned char* view, | |
9726c3c1 HS |
5173 | AArch64_valtype immed1, |
5174 | AArch64_valtype immed2, | |
9363c7c3 JY |
5175 | elfcpp::Elf_Xword doffset1, |
5176 | elfcpp::Elf_Xword doffset2, | |
5177 | elfcpp::Elf_Xword dst_mask) | |
5178 | { | |
5179 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; | |
5180 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
5181 | Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); | |
5182 | val &= ~dst_mask; | |
5183 | elfcpp::Swap<valsize, big_endian>::writeval(wv, | |
5184 | static_cast<Valtype>(val | (immed1 << doffset1) | | |
5185 | (immed2 << doffset2))); | |
5186 | } | |
5187 | ||
9726c3c1 | 5188 | // Update adr or adrp instruction with immed. |
9363c7c3 JY |
5189 | // In adr and adrp: [30:29] immlo [23:5] immhi |
5190 | ||
5191 | static inline void | |
9726c3c1 | 5192 | update_adr(unsigned char* view, AArch64_valtype immed) |
9363c7c3 JY |
5193 | { |
5194 | elfcpp::Elf_Xword dst_mask = (0x3 << 29) | (0x7ffff << 5); | |
9363c7c3 JY |
5195 | This::template update_view_two_parts<32>( |
5196 | view, | |
5197 | immed & 0x3, | |
5198 | (immed & 0x1ffffc) >> 2, | |
5199 | 29, | |
5200 | 5, | |
5201 | dst_mask); | |
5202 | } | |
5203 | ||
3a531937 JY |
5204 | // Update movz/movn instruction with bits immed. |
5205 | // Set instruction to movz if is_movz is true, otherwise set instruction | |
5206 | // to movn. | |
9726c3c1 | 5207 | |
3a531937 JY |
5208 | static inline void |
5209 | update_movnz(unsigned char* view, | |
9726c3c1 | 5210 | AArch64_valtype immed, |
3a531937 JY |
5211 | bool is_movz) |
5212 | { | |
5213 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype; | |
5214 | Valtype* wv = reinterpret_cast<Valtype*>(view); | |
5215 | Valtype val = elfcpp::Swap<32, big_endian>::readval(wv); | |
5216 | ||
5217 | const elfcpp::Elf_Xword doffset = | |
5218 | aarch64_howto[AArch64_reloc_property::INST_MOVW].doffset; | |
5219 | const elfcpp::Elf_Xword dst_mask = | |
5220 | aarch64_howto[AArch64_reloc_property::INST_MOVW].dst_mask; | |
5221 | ||
5222 | // Clear immediate fields and opc code. | |
9726c3c1 | 5223 | val &= ~(dst_mask | (0x3 << 29)); |
3a531937 JY |
5224 | |
5225 | // Set instruction to movz or movn. | |
5226 | // movz: [30:29] is 10 movn: [30:29] is 00 | |
5227 | if (is_movz) | |
9726c3c1 | 5228 | val |= (0x2 << 29); |
3a531937 JY |
5229 | |
5230 | elfcpp::Swap<32, big_endian>::writeval(wv, | |
5231 | static_cast<Valtype>(val | (immed << doffset))); | |
5232 | } | |
5233 | ||
5c28a503 HS |
5234 | public: |
5235 | ||
9726c3c1 HS |
5236 | // Update selected bits in text. |
5237 | ||
5238 | template<int valsize> | |
5239 | static inline typename This::Status | |
5240 | reloc_common(unsigned char* view, Address x, | |
5241 | const AArch64_reloc_property* reloc_property) | |
5242 | { | |
5243 | // Select bits from X. | |
5244 | Address immed = reloc_property->select_x_value(x); | |
5245 | ||
5246 | // Update view. | |
5247 | const AArch64_reloc_property::Reloc_inst inst = | |
5248 | reloc_property->reloc_inst(); | |
5249 | // If it is a data relocation or instruction has 2 parts of immediate | |
5250 | // fields, you should not call pcrela_general. | |
5251 | gold_assert(aarch64_howto[inst].doffset2 == -1 && | |
5252 | aarch64_howto[inst].doffset != -1); | |
5253 | This::template update_view<valsize>(view, immed, | |
5254 | aarch64_howto[inst].doffset, | |
5255 | aarch64_howto[inst].dst_mask); | |
5256 | ||
5257 | // Do check overflow or alignment if needed. | |
5258 | return (reloc_property->checkup_x_value(x) | |
5259 | ? This::STATUS_OKAY | |
5260 | : This::STATUS_OVERFLOW); | |
5261 | } | |
5262 | ||
a48d0c12 HS |
5263 | // Construct a B insn. Note, although we group it here with other relocation |
5264 | // operation, there is actually no 'relocation' involved here. | |
5265 | static inline void | |
5266 | construct_b(unsigned char* view, unsigned int branch_offset) | |
5267 | { | |
5268 | update_view_two_parts<32>(view, 0x05, (branch_offset >> 2), | |
5269 | 26, 0, 0xffffffff); | |
5270 | } | |
5271 | ||
9363c7c3 JY |
5272 | // Do a simple rela relocation at unaligned addresses. |
5273 | ||
5274 | template<int valsize> | |
5275 | static inline typename This::Status | |
5276 | rela_ua(unsigned char* view, | |
5277 | const Sized_relobj_file<size, big_endian>* object, | |
5278 | const Symbol_value<size>* psymval, | |
9726c3c1 | 5279 | AArch64_valtype addend, |
9363c7c3 JY |
5280 | const AArch64_reloc_property* reloc_property) |
5281 | { | |
5282 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype | |
5283 | Valtype; | |
5284 | typename elfcpp::Elf_types<size>::Elf_Addr x = | |
5285 | psymval->value(object, addend); | |
5286 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, | |
5287 | static_cast<Valtype>(x)); | |
5288 | return (reloc_property->checkup_x_value(x) | |
5289 | ? This::STATUS_OKAY | |
5290 | : This::STATUS_OVERFLOW); | |
5291 | } | |
5292 | ||
5293 | // Do a simple pc-relative relocation at unaligned addresses. | |
5294 | ||
5295 | template<int valsize> | |
5296 | static inline typename This::Status | |
5297 | pcrela_ua(unsigned char* view, | |
5298 | const Sized_relobj_file<size, big_endian>* object, | |
5299 | const Symbol_value<size>* psymval, | |
9726c3c1 | 5300 | AArch64_valtype addend, |
9363c7c3 JY |
5301 | Address address, |
5302 | const AArch64_reloc_property* reloc_property) | |
5303 | { | |
5304 | typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype | |
5305 | Valtype; | |
3a531937 | 5306 | Address x = psymval->value(object, addend) - address; |
9363c7c3 JY |
5307 | elfcpp::Swap_unaligned<valsize, big_endian>::writeval(view, |
5308 | static_cast<Valtype>(x)); | |
5309 | return (reloc_property->checkup_x_value(x) | |
5310 | ? This::STATUS_OKAY | |
5311 | : This::STATUS_OVERFLOW); | |
5312 | } | |
5313 | ||
5314 | // Do a simple rela relocation at aligned addresses. | |
5315 | ||
5316 | template<int valsize> | |
5317 | static inline typename This::Status | |
5318 | rela( | |
5319 | unsigned char* view, | |
5320 | const Sized_relobj_file<size, big_endian>* object, | |
5321 | const Symbol_value<size>* psymval, | |
9726c3c1 | 5322 | AArch64_valtype addend, |
9363c7c3 JY |
5323 | const AArch64_reloc_property* reloc_property) |
5324 | { | |
9726c3c1 | 5325 | typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; |
9363c7c3 | 5326 | Valtype* wv = reinterpret_cast<Valtype*>(view); |
3a531937 | 5327 | Address x = psymval->value(object, addend); |
9726c3c1 | 5328 | elfcpp::Swap<valsize, big_endian>::writeval(wv,static_cast<Valtype>(x)); |
9363c7c3 JY |
5329 | return (reloc_property->checkup_x_value(x) |
5330 | ? This::STATUS_OKAY | |
5331 | : This::STATUS_OVERFLOW); | |
5332 | } | |
5333 | ||
5334 | // Do relocate. Update selected bits in text. | |
5335 | // new_val = (val & ~dst_mask) | (immed << doffset) | |
5336 | ||
5337 | template<int valsize> | |
5338 | static inline typename This::Status | |
5339 | rela_general(unsigned char* view, | |
5340 | const Sized_relobj_file<size, big_endian>* object, | |
5341 | const Symbol_value<size>* psymval, | |
9726c3c1 | 5342 | AArch64_valtype addend, |
9363c7c3 JY |
5343 | const AArch64_reloc_property* reloc_property) |
5344 | { | |
5345 | // Calculate relocation. | |
83a01957 | 5346 | Address x = psymval->value(object, addend); |
9726c3c1 | 5347 | return This::template reloc_common<valsize>(view, x, reloc_property); |
9363c7c3 JY |
5348 | } |
5349 | ||
5350 | // Do relocate. Update selected bits in text. | |
5351 | // new val = (val & ~dst_mask) | (immed << doffset) | |
5352 | ||
5353 | template<int valsize> | |
5354 | static inline typename This::Status | |
5355 | rela_general( | |
5356 | unsigned char* view, | |
9726c3c1 HS |
5357 | AArch64_valtype s, |
5358 | AArch64_valtype addend, | |
9363c7c3 JY |
5359 | const AArch64_reloc_property* reloc_property) |
5360 | { | |
5361 | // Calculate relocation. | |
5362 | Address x = s + addend; | |
9726c3c1 | 5363 | return This::template reloc_common<valsize>(view, x, reloc_property); |
9363c7c3 JY |
5364 | } |
5365 | ||
5366 | // Do address relative relocate. Update selected bits in text. | |
5367 | // new val = (val & ~dst_mask) | (immed << doffset) | |
5368 | ||
5369 | template<int valsize> | |
5370 | static inline typename This::Status | |
5371 | pcrela_general( | |
5372 | unsigned char* view, | |
5373 | const Sized_relobj_file<size, big_endian>* object, | |
5374 | const Symbol_value<size>* psymval, | |
9726c3c1 | 5375 | AArch64_valtype addend, |
9363c7c3 JY |
5376 | Address address, |
5377 | const AArch64_reloc_property* reloc_property) | |
5378 | { | |
5379 | // Calculate relocation. | |
3a531937 | 5380 | Address x = psymval->value(object, addend) - address; |
9726c3c1 HS |
5381 | return This::template reloc_common<valsize>(view, x, reloc_property); |
5382 | } | |
9363c7c3 | 5383 | |
9363c7c3 | 5384 | |
9726c3c1 | 5385 | // Calculate (S + A) - address, update adr instruction. |
9363c7c3 | 5386 | |
9726c3c1 HS |
5387 | static inline typename This::Status |
5388 | adr(unsigned char* view, | |
5389 | const Sized_relobj_file<size, big_endian>* object, | |
5390 | const Symbol_value<size>* psymval, | |
5391 | Address addend, | |
5392 | Address address, | |
5393 | const AArch64_reloc_property* /* reloc_property */) | |
5394 | { | |
5395 | AArch64_valtype x = psymval->value(object, addend) - address; | |
5396 | // Pick bits [20:0] of X. | |
5397 | AArch64_valtype immed = x & 0x1fffff; | |
5398 | update_adr(view, immed); | |
5399 | // Check -2^20 <= X < 2^20 | |
5400 | return (size == 64 && Bits<21>::has_overflow((x)) | |
5401 | ? This::STATUS_OVERFLOW | |
5402 | : This::STATUS_OKAY); | |
9363c7c3 JY |
5403 | } |
5404 | ||
5405 | // Calculate PG(S+A) - PG(address), update adrp instruction. | |
5406 | // R_AARCH64_ADR_PREL_PG_HI21 | |
5407 | ||
5408 | static inline typename This::Status | |
5409 | adrp( | |
5410 | unsigned char* view, | |
5411 | Address sa, | |
5412 | Address address) | |
5413 | { | |
9726c3c1 HS |
5414 | AArch64_valtype x = This::Page(sa) - This::Page(address); |
5415 | // Pick [32:12] of X. | |
5416 | AArch64_valtype immed = (x >> 12) & 0x1fffff; | |
5417 | update_adr(view, immed); | |
83a01957 HS |
5418 | // Check -2^32 <= X < 2^32 |
5419 | return (size == 64 && Bits<33>::has_overflow((x)) | |
9363c7c3 JY |
5420 | ? This::STATUS_OVERFLOW |
5421 | : This::STATUS_OKAY); | |
5422 | } | |
5423 | ||
5424 | // Calculate PG(S+A) - PG(address), update adrp instruction. | |
5425 | // R_AARCH64_ADR_PREL_PG_HI21 | |
5426 | ||
5427 | static inline typename This::Status | |
5428 | adrp(unsigned char* view, | |
5429 | const Sized_relobj_file<size, big_endian>* object, | |
5430 | const Symbol_value<size>* psymval, | |
5431 | Address addend, | |
5432 | Address address, | |
5433 | const AArch64_reloc_property* reloc_property) | |
5434 | { | |
5435 | Address sa = psymval->value(object, addend); | |
9726c3c1 HS |
5436 | AArch64_valtype x = This::Page(sa) - This::Page(address); |
5437 | // Pick [32:12] of X. | |
5438 | AArch64_valtype immed = (x >> 12) & 0x1fffff; | |
5439 | update_adr(view, immed); | |
9363c7c3 JY |
5440 | return (reloc_property->checkup_x_value(x) |
5441 | ? This::STATUS_OKAY | |
5442 | : This::STATUS_OVERFLOW); | |
5443 | } | |
5444 | ||
3a531937 JY |
5445 | // Update mov[n/z] instruction. Check overflow if needed. |
5446 | // If X >=0, set the instruction to movz and its immediate value to the | |
5447 | // selected bits S. | |
5448 | // If X < 0, set the instruction to movn and its immediate value to | |
5449 | // NOT (selected bits of). | |
5450 | ||
5451 | static inline typename This::Status | |
5452 | movnz(unsigned char* view, | |
9726c3c1 | 5453 | AArch64_valtype x, |
3a531937 JY |
5454 | const AArch64_reloc_property* reloc_property) |
5455 | { | |
5456 | // Select bits from X. | |
9726c3c1 HS |
5457 | Address immed; |
5458 | bool is_movz; | |
5459 | typedef typename elfcpp::Elf_types<size>::Elf_Swxword SignedW; | |
5460 | if (static_cast<SignedW>(x) >= 0) | |
5461 | { | |
5462 | immed = reloc_property->select_x_value(x); | |
5463 | is_movz = true; | |
5464 | } | |
5465 | else | |
3a531937 | 5466 | { |
9726c3c1 | 5467 | immed = reloc_property->select_x_value(~x);; |
3a531937 JY |
5468 | is_movz = false; |
5469 | } | |
5470 | ||
5471 | // Update movnz instruction. | |
5472 | update_movnz(view, immed, is_movz); | |
5473 | ||
5474 | // Do check overflow or alignment if needed. | |
5475 | return (reloc_property->checkup_x_value(x) | |
5476 | ? This::STATUS_OKAY | |
5477 | : This::STATUS_OVERFLOW); | |
5478 | } | |
5479 | ||
83a01957 HS |
5480 | static inline bool |
5481 | maybe_apply_stub(unsigned int, | |
5482 | const The_relocate_info*, | |
5483 | const The_rela&, | |
5484 | unsigned char*, | |
5485 | Address, | |
5486 | const Sized_symbol<size>*, | |
5487 | const Symbol_value<size>*, | |
0bf32ea9 JY |
5488 | const Sized_relobj_file<size, big_endian>*, |
5489 | section_size_type); | |
83a01957 | 5490 | |
3a531937 JY |
5491 | }; // End of AArch64_relocate_functions |
5492 | ||
5493 | ||
83a01957 HS |
5494 | // For a certain relocation type (usually jump/branch), test to see if the |
5495 | // destination needs a stub to fulfil. If so, re-route the destination of the | |
5496 | // original instruction to the stub, note, at this time, the stub has already | |
5497 | // been generated. | |
5498 | ||
5499 | template<int size, bool big_endian> | |
5500 | bool | |
5501 | AArch64_relocate_functions<size, big_endian>:: | |
5502 | maybe_apply_stub(unsigned int r_type, | |
5503 | const The_relocate_info* relinfo, | |
5504 | const The_rela& rela, | |
5505 | unsigned char* view, | |
5506 | Address address, | |
5507 | const Sized_symbol<size>* gsym, | |
5508 | const Symbol_value<size>* psymval, | |
0bf32ea9 JY |
5509 | const Sized_relobj_file<size, big_endian>* object, |
5510 | section_size_type current_group_size) | |
83a01957 HS |
5511 | { |
5512 | if (parameters->options().relocatable()) | |
5513 | return false; | |
5514 | ||
5515 | typename elfcpp::Elf_types<size>::Elf_Swxword addend = rela.get_r_addend(); | |
5516 | Address branch_target = psymval->value(object, 0) + addend; | |
a48d0c12 HS |
5517 | int stub_type = |
5518 | The_reloc_stub::stub_type_for_reloc(r_type, address, branch_target); | |
5519 | if (stub_type == ST_NONE) | |
83a01957 HS |
5520 | return false; |
5521 | ||
5522 | const The_aarch64_relobj* aarch64_relobj = | |
5523 | static_cast<const The_aarch64_relobj*>(object); | |
69431bab EC |
5524 | const AArch64_reloc_property* arp = |
5525 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
5526 | gold_assert(arp != NULL); | |
5527 | ||
5528 | // We don't create stubs for undefined symbols, but do for weak. | |
5529 | if (gsym | |
5530 | && !gsym->use_plt_offset(arp->reference_flags()) | |
5531 | && gsym->is_undefined()) | |
81b6fe3b EC |
5532 | { |
5533 | gold_debug(DEBUG_TARGET, | |
5534 | "stub: looking for a stub for undefined symbol %s in file %s", | |
5535 | gsym->name(), aarch64_relobj->name().c_str()); | |
5536 | return false; | |
5537 | } | |
5538 | ||
83a01957 HS |
5539 | The_stub_table* stub_table = aarch64_relobj->stub_table(relinfo->data_shndx); |
5540 | gold_assert(stub_table != NULL); | |
5541 | ||
5542 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
5543 | typename The_reloc_stub::Key stub_key(stub_type, gsym, object, r_sym, addend); | |
5544 | The_reloc_stub* stub = stub_table->find_reloc_stub(stub_key); | |
5545 | gold_assert(stub != NULL); | |
5546 | ||
5547 | Address new_branch_target = stub_table->address() + stub->offset(); | |
5548 | typename elfcpp::Swap<size, big_endian>::Valtype branch_offset = | |
5549 | new_branch_target - address; | |
aed56ec5 | 5550 | typename This::Status status = This::template |
83a01957 HS |
5551 | rela_general<32>(view, branch_offset, 0, arp); |
5552 | if (status != This::STATUS_OKAY) | |
5553 | gold_error(_("Stub is too far away, try a smaller value " | |
0bf32ea9 | 5554 | "for '--stub-group-size'. The current value is 0x%lx."), |
add6016b | 5555 | static_cast<unsigned long>(current_group_size)); |
83a01957 HS |
5556 | return true; |
5557 | } | |
5558 | ||
5559 | ||
5560 | // Group input sections for stub generation. | |
5561 | // | |
5562 | // We group input sections in an output section so that the total size, | |
5563 | // including any padding space due to alignment is smaller than GROUP_SIZE | |
5564 | // unless the only input section in group is bigger than GROUP_SIZE already. | |
5565 | // Then an ARM stub table is created to follow the last input section | |
5566 | // in group. For each group an ARM stub table is created an is placed | |
5567 | // after the last group. If STUB_ALWAYS_AFTER_BRANCH is false, we further | |
5568 | // extend the group after the stub table. | |
5569 | ||
5570 | template<int size, bool big_endian> | |
5571 | void | |
5572 | Target_aarch64<size, big_endian>::group_sections( | |
5573 | Layout* layout, | |
5574 | section_size_type group_size, | |
5575 | bool stubs_always_after_branch, | |
5576 | const Task* task) | |
5577 | { | |
5578 | // Group input sections and insert stub table | |
5579 | Layout::Section_list section_list; | |
5580 | layout->get_executable_sections(§ion_list); | |
5581 | for (Layout::Section_list::const_iterator p = section_list.begin(); | |
5582 | p != section_list.end(); | |
5583 | ++p) | |
5584 | { | |
5585 | AArch64_output_section<size, big_endian>* output_section = | |
5586 | static_cast<AArch64_output_section<size, big_endian>*>(*p); | |
5587 | output_section->group_sections(group_size, stubs_always_after_branch, | |
5588 | this, task); | |
5589 | } | |
5590 | } | |
5591 | ||
5592 | ||
5593 | // Find the AArch64_input_section object corresponding to the SHNDX-th input | |
5594 | // section of RELOBJ. | |
5595 | ||
5596 | template<int size, bool big_endian> | |
5597 | AArch64_input_section<size, big_endian>* | |
5598 | Target_aarch64<size, big_endian>::find_aarch64_input_section( | |
5599 | Relobj* relobj, unsigned int shndx) const | |
5600 | { | |
5601 | Section_id sid(relobj, shndx); | |
5602 | typename AArch64_input_section_map::const_iterator p = | |
5603 | this->aarch64_input_section_map_.find(sid); | |
5604 | return (p != this->aarch64_input_section_map_.end()) ? p->second : NULL; | |
5605 | } | |
5606 | ||
5607 | ||
5608 | // Make a new AArch64_input_section object. | |
5609 | ||
5610 | template<int size, bool big_endian> | |
5611 | AArch64_input_section<size, big_endian>* | |
5612 | Target_aarch64<size, big_endian>::new_aarch64_input_section( | |
5613 | Relobj* relobj, unsigned int shndx) | |
5614 | { | |
5615 | Section_id sid(relobj, shndx); | |
5616 | ||
5617 | AArch64_input_section<size, big_endian>* input_section = | |
5618 | new AArch64_input_section<size, big_endian>(relobj, shndx); | |
5619 | input_section->init(); | |
5620 | ||
5621 | // Register new AArch64_input_section in map for look-up. | |
5622 | std::pair<typename AArch64_input_section_map::iterator,bool> ins = | |
5623 | this->aarch64_input_section_map_.insert( | |
5624 | std::make_pair(sid, input_section)); | |
5625 | ||
5626 | // Make sure that it we have not created another AArch64_input_section | |
5627 | // for this input section already. | |
5628 | gold_assert(ins.second); | |
5629 | ||
5630 | return input_section; | |
5631 | } | |
5632 | ||
5633 | ||
5634 | // Relaxation hook. This is where we do stub generation. | |
5635 | ||
5636 | template<int size, bool big_endian> | |
5637 | bool | |
5638 | Target_aarch64<size, big_endian>::do_relax( | |
5639 | int pass, | |
5640 | const Input_objects* input_objects, | |
5641 | Symbol_table* symtab, | |
5642 | Layout* layout , | |
5643 | const Task* task) | |
5644 | { | |
5645 | gold_assert(!parameters->options().relocatable()); | |
5646 | if (pass == 1) | |
5647 | { | |
0bf32ea9 JY |
5648 | // We don't handle negative stub_group_size right now. |
5649 | this->stub_group_size_ = abs(parameters->options().stub_group_size()); | |
5650 | if (this->stub_group_size_ == 1) | |
83a01957 HS |
5651 | { |
5652 | // Leave room for 4096 4-byte stub entries. If we exceed that, then we | |
5653 | // will fail to link. The user will have to relink with an explicit | |
5654 | // group size option. | |
0bf32ea9 JY |
5655 | this->stub_group_size_ = The_reloc_stub::MAX_BRANCH_OFFSET - |
5656 | 4096 * 4; | |
83a01957 | 5657 | } |
0bf32ea9 | 5658 | group_sections(layout, this->stub_group_size_, true, task); |
83a01957 HS |
5659 | } |
5660 | else | |
5661 | { | |
5662 | // If this is not the first pass, addresses and file offsets have | |
5663 | // been reset at this point, set them here. | |
5664 | for (Stub_table_iterator sp = this->stub_tables_.begin(); | |
5665 | sp != this->stub_tables_.end(); ++sp) | |
5666 | { | |
5667 | The_stub_table* stt = *sp; | |
5668 | The_aarch64_input_section* owner = stt->owner(); | |
5669 | off_t off = align_address(owner->original_size(), | |
5670 | stt->addralign()); | |
5671 | stt->set_address_and_file_offset(owner->address() + off, | |
5672 | owner->offset() + off); | |
5673 | } | |
5674 | } | |
5675 | ||
5676 | // Scan relocs for relocation stubs | |
5677 | for (Input_objects::Relobj_iterator op = input_objects->relobj_begin(); | |
5678 | op != input_objects->relobj_end(); | |
5679 | ++op) | |
5680 | { | |
5681 | The_aarch64_relobj* aarch64_relobj = | |
5682 | static_cast<The_aarch64_relobj*>(*op); | |
5683 | // Lock the object so we can read from it. This is only called | |
5684 | // single-threaded from Layout::finalize, so it is OK to lock. | |
5685 | Task_lock_obj<Object> tl(task, aarch64_relobj); | |
5686 | aarch64_relobj->scan_sections_for_stubs(this, symtab, layout); | |
5687 | } | |
5688 | ||
5689 | bool any_stub_table_changed = false; | |
5690 | for (Stub_table_iterator siter = this->stub_tables_.begin(); | |
5691 | siter != this->stub_tables_.end() && !any_stub_table_changed; ++siter) | |
5692 | { | |
5693 | The_stub_table* stub_table = *siter; | |
5694 | if (stub_table->update_data_size_changed_p()) | |
5695 | { | |
5696 | The_aarch64_input_section* owner = stub_table->owner(); | |
5697 | uint64_t address = owner->address(); | |
5698 | off_t offset = owner->offset(); | |
5699 | owner->reset_address_and_file_offset(); | |
5700 | owner->set_address_and_file_offset(address, offset); | |
5701 | ||
5702 | any_stub_table_changed = true; | |
5703 | } | |
5704 | } | |
5705 | ||
5706 | // Do not continue relaxation. | |
5707 | bool continue_relaxation = any_stub_table_changed; | |
5708 | if (!continue_relaxation) | |
5709 | for (Stub_table_iterator sp = this->stub_tables_.begin(); | |
5710 | (sp != this->stub_tables_.end()); | |
5711 | ++sp) | |
5712 | (*sp)->finalize_stubs(); | |
5713 | ||
5714 | return continue_relaxation; | |
5715 | } | |
5716 | ||
5717 | ||
5718 | // Make a new Stub_table. | |
5719 | ||
5720 | template<int size, bool big_endian> | |
5721 | Stub_table<size, big_endian>* | |
5722 | Target_aarch64<size, big_endian>::new_stub_table( | |
5723 | AArch64_input_section<size, big_endian>* owner) | |
5724 | { | |
5725 | Stub_table<size, big_endian>* stub_table = | |
5726 | new Stub_table<size, big_endian>(owner); | |
5727 | stub_table->set_address(align_address( | |
5728 | owner->address() + owner->data_size(), 8)); | |
5729 | stub_table->set_file_offset(owner->offset() + owner->data_size()); | |
5730 | stub_table->finalize_data_size(); | |
5731 | ||
5732 | this->stub_tables_.push_back(stub_table); | |
5733 | ||
5734 | return stub_table; | |
5735 | } | |
5736 | ||
5737 | ||
3a531937 | 5738 | template<int size, bool big_endian> |
7fa5525f | 5739 | uint64_t |
3a531937 | 5740 | Target_aarch64<size, big_endian>::do_reloc_addend( |
7fa5525f | 5741 | void* arg, unsigned int r_type, uint64_t) const |
3a531937 JY |
5742 | { |
5743 | gold_assert(r_type == elfcpp::R_AARCH64_TLSDESC); | |
5744 | uintptr_t intarg = reinterpret_cast<uintptr_t>(arg); | |
5745 | gold_assert(intarg < this->tlsdesc_reloc_info_.size()); | |
5746 | const Tlsdesc_info& ti(this->tlsdesc_reloc_info_[intarg]); | |
5747 | const Symbol_value<size>* psymval = ti.object->local_symbol(ti.r_sym); | |
5748 | gold_assert(psymval->is_tls_symbol()); | |
5749 | // The value of a TLS symbol is the offset in the TLS segment. | |
5750 | return psymval->value(ti.object, 0); | |
5751 | } | |
9363c7c3 | 5752 | |
053a4d68 JY |
5753 | // Return the number of entries in the PLT. |
5754 | ||
5755 | template<int size, bool big_endian> | |
5756 | unsigned int | |
5757 | Target_aarch64<size, big_endian>::plt_entry_count() const | |
5758 | { | |
5759 | if (this->plt_ == NULL) | |
5760 | return 0; | |
5761 | return this->plt_->entry_count(); | |
5762 | } | |
5763 | ||
5764 | // Return the offset of the first non-reserved PLT entry. | |
5765 | ||
5766 | template<int size, bool big_endian> | |
5767 | unsigned int | |
5768 | Target_aarch64<size, big_endian>::first_plt_entry_offset() const | |
5769 | { | |
5770 | return this->plt_->first_plt_entry_offset(); | |
5771 | } | |
5772 | ||
5773 | // Return the size of each PLT entry. | |
5774 | ||
5775 | template<int size, bool big_endian> | |
5776 | unsigned int | |
5777 | Target_aarch64<size, big_endian>::plt_entry_size() const | |
5778 | { | |
5779 | return this->plt_->get_plt_entry_size(); | |
5780 | } | |
5781 | ||
3a531937 | 5782 | // Define the _TLS_MODULE_BASE_ symbol in the TLS segment. |
053a4d68 JY |
5783 | |
5784 | template<int size, bool big_endian> | |
3a531937 JY |
5785 | void |
5786 | Target_aarch64<size, big_endian>::define_tls_base_symbol( | |
5787 | Symbol_table* symtab, Layout* layout) | |
053a4d68 | 5788 | { |
3a531937 JY |
5789 | if (this->tls_base_symbol_defined_) |
5790 | return; | |
5791 | ||
5792 | Output_segment* tls_segment = layout->tls_segment(); | |
5793 | if (tls_segment != NULL) | |
5794 | { | |
6b0ad2eb | 5795 | // _TLS_MODULE_BASE_ always points to the beginning of tls segment. |
3a531937 JY |
5796 | symtab->define_in_output_segment("_TLS_MODULE_BASE_", NULL, |
5797 | Symbol_table::PREDEFINED, | |
5798 | tls_segment, 0, 0, | |
5799 | elfcpp::STT_TLS, | |
5800 | elfcpp::STB_LOCAL, | |
5801 | elfcpp::STV_HIDDEN, 0, | |
6b0ad2eb | 5802 | Symbol::SEGMENT_START, |
3a531937 JY |
5803 | true); |
5804 | } | |
5805 | this->tls_base_symbol_defined_ = true; | |
053a4d68 JY |
5806 | } |
5807 | ||
3a531937 | 5808 | // Create the reserved PLT and GOT entries for the TLS descriptor resolver. |
053a4d68 JY |
5809 | |
5810 | template<int size, bool big_endian> | |
3a531937 JY |
5811 | void |
5812 | Target_aarch64<size, big_endian>::reserve_tlsdesc_entries( | |
5813 | Symbol_table* symtab, Layout* layout) | |
053a4d68 | 5814 | { |
3a531937 JY |
5815 | if (this->plt_ == NULL) |
5816 | this->make_plt_section(symtab, layout); | |
5817 | ||
5818 | if (!this->plt_->has_tlsdesc_entry()) | |
053a4d68 | 5819 | { |
3a531937 JY |
5820 | // Allocate the TLSDESC_GOT entry. |
5821 | Output_data_got_aarch64<size, big_endian>* got = | |
5822 | this->got_section(symtab, layout); | |
5823 | unsigned int got_offset = got->add_constant(0); | |
5824 | ||
5825 | // Allocate the TLSDESC_PLT entry. | |
5826 | this->plt_->reserve_tlsdesc_entry(got_offset); | |
053a4d68 | 5827 | } |
053a4d68 JY |
5828 | } |
5829 | ||
3a531937 | 5830 | // Create a GOT entry for the TLS module index. |
053a4d68 JY |
5831 | |
5832 | template<int size, bool big_endian> | |
3a531937 JY |
5833 | unsigned int |
5834 | Target_aarch64<size, big_endian>::got_mod_index_entry( | |
5835 | Symbol_table* symtab, Layout* layout, | |
5836 | Sized_relobj_file<size, big_endian>* object) | |
5837 | { | |
5838 | if (this->got_mod_index_offset_ == -1U) | |
5839 | { | |
5840 | gold_assert(symtab != NULL && layout != NULL && object != NULL); | |
5841 | Reloc_section* rela_dyn = this->rela_dyn_section(layout); | |
5842 | Output_data_got_aarch64<size, big_endian>* got = | |
5843 | this->got_section(symtab, layout); | |
5844 | unsigned int got_offset = got->add_constant(0); | |
5845 | rela_dyn->add_local(object, 0, elfcpp::R_AARCH64_TLS_DTPMOD64, got, | |
5846 | got_offset, 0); | |
5847 | got->add_constant(0); | |
5848 | this->got_mod_index_offset_ = got_offset; | |
5849 | } | |
5850 | return this->got_mod_index_offset_; | |
5851 | } | |
5852 | ||
5853 | // Optimize the TLS relocation type based on what we know about the | |
5854 | // symbol. IS_FINAL is true if the final address of this symbol is | |
5855 | // known at link time. | |
5856 | ||
5857 | template<int size, bool big_endian> | |
5858 | tls::Tls_optimization | |
5859 | Target_aarch64<size, big_endian>::optimize_tls_reloc(bool is_final, | |
5860 | int r_type) | |
5861 | { | |
5862 | // If we are generating a shared library, then we can't do anything | |
5863 | // in the linker | |
5864 | if (parameters->options().shared()) | |
5865 | return tls::TLSOPT_NONE; | |
5866 | ||
5867 | switch (r_type) | |
5868 | { | |
5869 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: | |
5870 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
5871 | case elfcpp::R_AARCH64_TLSDESC_LD_PREL19: | |
5872 | case elfcpp::R_AARCH64_TLSDESC_ADR_PREL21: | |
5873 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
5874 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
5875 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
5876 | case elfcpp::R_AARCH64_TLSDESC_OFF_G1: | |
5877 | case elfcpp::R_AARCH64_TLSDESC_OFF_G0_NC: | |
5878 | case elfcpp::R_AARCH64_TLSDESC_LDR: | |
5879 | case elfcpp::R_AARCH64_TLSDESC_ADD: | |
5880 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
5881 | // These are General-Dynamic which permits fully general TLS | |
5882 | // access. Since we know that we are generating an executable, | |
5883 | // we can convert this to Initial-Exec. If we also know that | |
5884 | // this is a local symbol, we can further switch to Local-Exec. | |
5885 | if (is_final) | |
5886 | return tls::TLSOPT_TO_LE; | |
5887 | return tls::TLSOPT_TO_IE; | |
5888 | ||
9726c3c1 HS |
5889 | case elfcpp::R_AARCH64_TLSLD_ADR_PAGE21: |
5890 | case elfcpp::R_AARCH64_TLSLD_ADD_LO12_NC: | |
5891 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1: | |
5892 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: | |
6b0ad2eb JY |
5893 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12: |
5894 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: | |
9726c3c1 HS |
5895 | // These are Local-Dynamic, which refer to local symbols in the |
5896 | // dynamic TLS block. Since we know that we generating an | |
5897 | // executable, we can switch to Local-Exec. | |
5898 | return tls::TLSOPT_TO_LE; | |
5899 | ||
3a531937 JY |
5900 | case elfcpp::R_AARCH64_TLSIE_MOVW_GOTTPREL_G1: |
5901 | case elfcpp::R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: | |
5902 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
5903 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
5904 | case elfcpp::R_AARCH64_TLSIE_LD_GOTTPREL_PREL19: | |
5905 | // These are Initial-Exec relocs which get the thread offset | |
5906 | // from the GOT. If we know that we are linking against the | |
5907 | // local symbol, we can switch to Local-Exec, which links the | |
5908 | // thread offset into the instruction. | |
5909 | if (is_final) | |
5910 | return tls::TLSOPT_TO_LE; | |
5911 | return tls::TLSOPT_NONE; | |
5912 | ||
5913 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
5914 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
5915 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
5916 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
5917 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
5918 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: | |
5919 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
5920 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
e82e6b2b CC |
5921 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12: |
5922 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC: | |
5923 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12: | |
5924 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC: | |
5925 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12: | |
5926 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC: | |
5927 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12: | |
5928 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC: | |
3a531937 JY |
5929 | // When we already have Local-Exec, there is nothing further we |
5930 | // can do. | |
5931 | return tls::TLSOPT_NONE; | |
5932 | ||
5933 | default: | |
5934 | gold_unreachable(); | |
5935 | } | |
5936 | } | |
5937 | ||
5938 | // Returns true if this relocation type could be that of a function pointer. | |
5939 | ||
5940 | template<int size, bool big_endian> | |
5941 | inline bool | |
5942 | Target_aarch64<size, big_endian>::Scan::possible_function_pointer_reloc( | |
5943 | unsigned int r_type) | |
5944 | { | |
5945 | switch (r_type) | |
5946 | { | |
9726c3c1 HS |
5947 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: |
5948 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: | |
5949 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: | |
5950 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
5951 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
3a531937 JY |
5952 | { |
5953 | return true; | |
5954 | } | |
5955 | } | |
5956 | return false; | |
5957 | } | |
5958 | ||
5959 | // For safe ICF, scan a relocation for a local symbol to check if it | |
5960 | // corresponds to a function pointer being taken. In that case mark | |
5961 | // the function whose pointer was taken as not foldable. | |
5962 | ||
5963 | template<int size, bool big_endian> | |
5964 | inline bool | |
5965 | Target_aarch64<size, big_endian>::Scan::local_reloc_may_be_function_pointer( | |
5966 | Symbol_table* , | |
053a4d68 JY |
5967 | Layout* , |
5968 | Target_aarch64<size, big_endian>* , | |
5969 | Sized_relobj_file<size, big_endian>* , | |
5970 | unsigned int , | |
5971 | Output_section* , | |
5972 | const elfcpp::Rela<size, big_endian>& , | |
5973 | unsigned int r_type, | |
5974 | const elfcpp::Sym<size, big_endian>&) | |
5975 | { | |
9726c3c1 | 5976 | // When building a shared library, do not fold any local symbols. |
053a4d68 | 5977 | return (parameters->options().shared() |
9363c7c3 | 5978 | || possible_function_pointer_reloc(r_type)); |
053a4d68 JY |
5979 | } |
5980 | ||
5981 | // For safe ICF, scan a relocation for a global symbol to check if it | |
5982 | // corresponds to a function pointer being taken. In that case mark | |
5983 | // the function whose pointer was taken as not foldable. | |
5984 | ||
5985 | template<int size, bool big_endian> | |
5986 | inline bool | |
5987 | Target_aarch64<size, big_endian>::Scan::global_reloc_may_be_function_pointer( | |
5988 | Symbol_table* , | |
5989 | Layout* , | |
5990 | Target_aarch64<size, big_endian>* , | |
5991 | Sized_relobj_file<size, big_endian>* , | |
5992 | unsigned int , | |
5993 | Output_section* , | |
5994 | const elfcpp::Rela<size, big_endian>& , | |
5995 | unsigned int r_type, | |
5996 | Symbol* gsym) | |
5997 | { | |
5998 | // When building a shared library, do not fold symbols whose visibility | |
5999 | // is hidden, internal or protected. | |
6000 | return ((parameters->options().shared() | |
9363c7c3 JY |
6001 | && (gsym->visibility() == elfcpp::STV_INTERNAL |
6002 | || gsym->visibility() == elfcpp::STV_PROTECTED | |
6003 | || gsym->visibility() == elfcpp::STV_HIDDEN)) | |
6004 | || possible_function_pointer_reloc(r_type)); | |
053a4d68 JY |
6005 | } |
6006 | ||
6007 | // Report an unsupported relocation against a local symbol. | |
6008 | ||
6009 | template<int size, bool big_endian> | |
6010 | void | |
6011 | Target_aarch64<size, big_endian>::Scan::unsupported_reloc_local( | |
6012 | Sized_relobj_file<size, big_endian>* object, | |
6013 | unsigned int r_type) | |
6014 | { | |
6015 | gold_error(_("%s: unsupported reloc %u against local symbol"), | |
6016 | object->name().c_str(), r_type); | |
6017 | } | |
6018 | ||
6019 | // We are about to emit a dynamic relocation of type R_TYPE. If the | |
6020 | // dynamic linker does not support it, issue an error. | |
6021 | ||
6022 | template<int size, bool big_endian> | |
6023 | void | |
6024 | Target_aarch64<size, big_endian>::Scan::check_non_pic(Relobj* object, | |
9363c7c3 | 6025 | unsigned int r_type) |
053a4d68 JY |
6026 | { |
6027 | gold_assert(r_type != elfcpp::R_AARCH64_NONE); | |
6028 | ||
6029 | switch (r_type) | |
6030 | { | |
6031 | // These are the relocation types supported by glibc for AARCH64. | |
6032 | case elfcpp::R_AARCH64_NONE: | |
6033 | case elfcpp::R_AARCH64_COPY: | |
6034 | case elfcpp::R_AARCH64_GLOB_DAT: | |
6035 | case elfcpp::R_AARCH64_JUMP_SLOT: | |
6036 | case elfcpp::R_AARCH64_RELATIVE: | |
6037 | case elfcpp::R_AARCH64_TLS_DTPREL64: | |
6038 | case elfcpp::R_AARCH64_TLS_DTPMOD64: | |
6039 | case elfcpp::R_AARCH64_TLS_TPREL64: | |
6040 | case elfcpp::R_AARCH64_TLSDESC: | |
6041 | case elfcpp::R_AARCH64_IRELATIVE: | |
6042 | case elfcpp::R_AARCH64_ABS32: | |
6043 | case elfcpp::R_AARCH64_ABS64: | |
6044 | return; | |
6045 | ||
6046 | default: | |
6047 | break; | |
6048 | } | |
6049 | ||
6050 | // This prevents us from issuing more than one error per reloc | |
6051 | // section. But we can still wind up issuing more than one | |
6052 | // error per object file. | |
6053 | if (this->issued_non_pic_error_) | |
6054 | return; | |
6055 | gold_assert(parameters->options().output_is_position_independent()); | |
6056 | object->error(_("requires unsupported dynamic reloc; " | |
9363c7c3 | 6057 | "recompile with -fPIC")); |
053a4d68 JY |
6058 | this->issued_non_pic_error_ = true; |
6059 | return; | |
6060 | } | |
6061 | ||
9726c3c1 HS |
6062 | // Return whether we need to make a PLT entry for a relocation of the |
6063 | // given type against a STT_GNU_IFUNC symbol. | |
6064 | ||
6065 | template<int size, bool big_endian> | |
6066 | bool | |
6067 | Target_aarch64<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( | |
6068 | Sized_relobj_file<size, big_endian>* object, | |
6069 | unsigned int r_type) | |
6070 | { | |
6071 | const AArch64_reloc_property* arp = | |
6072 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
6073 | gold_assert(arp != NULL); | |
6074 | ||
6075 | int flags = arp->reference_flags(); | |
6076 | if (flags & Symbol::TLS_REF) | |
6077 | { | |
6078 | gold_error(_("%s: unsupported TLS reloc %s for IFUNC symbol"), | |
6079 | object->name().c_str(), arp->name().c_str()); | |
6080 | return false; | |
6081 | } | |
6082 | return flags != 0; | |
6083 | } | |
6084 | ||
053a4d68 JY |
6085 | // Scan a relocation for a local symbol. |
6086 | ||
6087 | template<int size, bool big_endian> | |
6088 | inline void | |
6089 | Target_aarch64<size, big_endian>::Scan::local( | |
8e33481e HS |
6090 | Symbol_table* symtab, |
6091 | Layout* layout, | |
6092 | Target_aarch64<size, big_endian>* target, | |
9363c7c3 | 6093 | Sized_relobj_file<size, big_endian>* object, |
8e33481e HS |
6094 | unsigned int data_shndx, |
6095 | Output_section* output_section, | |
6096 | const elfcpp::Rela<size, big_endian>& rela, | |
053a4d68 | 6097 | unsigned int r_type, |
9726c3c1 | 6098 | const elfcpp::Sym<size, big_endian>& lsym, |
053a4d68 JY |
6099 | bool is_discarded) |
6100 | { | |
6101 | if (is_discarded) | |
6102 | return; | |
6103 | ||
8e33481e | 6104 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
3a531937 | 6105 | Reloc_section; |
3a531937 | 6106 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
8e33481e | 6107 | |
9726c3c1 HS |
6108 | // A local STT_GNU_IFUNC symbol may require a PLT entry. |
6109 | bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; | |
6110 | if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
6111 | target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); | |
6112 | ||
053a4d68 JY |
6113 | switch (r_type) |
6114 | { | |
5627d875 IK |
6115 | case elfcpp::R_AARCH64_NONE: |
6116 | break; | |
6117 | ||
9363c7c3 JY |
6118 | case elfcpp::R_AARCH64_ABS32: |
6119 | case elfcpp::R_AARCH64_ABS16: | |
8e33481e HS |
6120 | if (parameters->options().output_is_position_independent()) |
6121 | { | |
6122 | gold_error(_("%s: unsupported reloc %u in pos independent link."), | |
6123 | object->name().c_str(), r_type); | |
6124 | } | |
6125 | break; | |
6126 | ||
6127 | case elfcpp::R_AARCH64_ABS64: | |
9363c7c3 JY |
6128 | // If building a shared library or pie, we need to mark this as a dynmic |
6129 | // reloction, so that the dynamic loader can relocate it. | |
9363c7c3 JY |
6130 | if (parameters->options().output_is_position_independent()) |
6131 | { | |
8e33481e | 6132 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
8e33481e HS |
6133 | rela_dyn->add_local_relative(object, r_sym, |
6134 | elfcpp::R_AARCH64_RELATIVE, | |
6135 | output_section, | |
6136 | data_shndx, | |
6137 | rela.get_r_offset(), | |
6138 | rela.get_r_addend(), | |
9726c3c1 | 6139 | is_ifunc); |
9363c7c3 JY |
6140 | } |
6141 | break; | |
6142 | ||
8e33481e HS |
6143 | case elfcpp::R_AARCH64_PREL64: |
6144 | case elfcpp::R_AARCH64_PREL32: | |
6145 | case elfcpp::R_AARCH64_PREL16: | |
6146 | break; | |
6147 | ||
4d2f5d58 HS |
6148 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: |
6149 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
5c28a503 HS |
6150 | case elfcpp::R_AARCH64_LD64_GOTPAGE_LO15: |
6151 | // The above relocations are used to access GOT entries. | |
4d2f5d58 | 6152 | { |
8032ac03 IK |
6153 | Output_data_got_aarch64<size, big_endian>* got = |
6154 | target->got_section(symtab, layout); | |
4d2f5d58 HS |
6155 | bool is_new = false; |
6156 | // This symbol requires a GOT entry. | |
6157 | if (is_ifunc) | |
6158 | is_new = got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD); | |
6159 | else | |
6160 | is_new = got->add_local(object, r_sym, GOT_TYPE_STANDARD); | |
6161 | if (is_new && parameters->options().output_is_position_independent()) | |
6162 | target->rela_dyn_section(layout)-> | |
6163 | add_local_relative(object, | |
6164 | r_sym, | |
6165 | elfcpp::R_AARCH64_RELATIVE, | |
6166 | got, | |
6167 | object->local_got_offset(r_sym, | |
6168 | GOT_TYPE_STANDARD), | |
6169 | 0, | |
6170 | false); | |
6171 | } | |
6172 | break; | |
6173 | ||
8769bc4b HS |
6174 | case elfcpp::R_AARCH64_MOVW_UABS_G0: // 263 |
6175 | case elfcpp::R_AARCH64_MOVW_UABS_G0_NC: // 264 | |
6176 | case elfcpp::R_AARCH64_MOVW_UABS_G1: // 265 | |
6177 | case elfcpp::R_AARCH64_MOVW_UABS_G1_NC: // 266 | |
6178 | case elfcpp::R_AARCH64_MOVW_UABS_G2: // 267 | |
6179 | case elfcpp::R_AARCH64_MOVW_UABS_G2_NC: // 268 | |
6180 | case elfcpp::R_AARCH64_MOVW_UABS_G3: // 269 | |
6181 | case elfcpp::R_AARCH64_MOVW_SABS_G0: // 270 | |
6182 | case elfcpp::R_AARCH64_MOVW_SABS_G1: // 271 | |
6183 | case elfcpp::R_AARCH64_MOVW_SABS_G2: // 272 | |
6184 | if (parameters->options().output_is_position_independent()) | |
6185 | { | |
6186 | gold_error(_("%s: unsupported reloc %u in pos independent link."), | |
6187 | object->name().c_str(), r_type); | |
6188 | } | |
6189 | break; | |
6190 | ||
3a531937 JY |
6191 | case elfcpp::R_AARCH64_LD_PREL_LO19: // 273 |
6192 | case elfcpp::R_AARCH64_ADR_PREL_LO21: // 274 | |
6193 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: // 275 | |
6194 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: // 276 | |
6195 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: // 277 | |
6196 | case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC: // 278 | |
6197 | case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC: // 284 | |
6198 | case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC: // 285 | |
6199 | case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC: // 286 | |
8e33481e | 6200 | case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC: // 299 |
3a531937 | 6201 | break; |
053a4d68 | 6202 | |
8e33481e HS |
6203 | // Control flow, pc-relative. We don't need to do anything for a relative |
6204 | // addressing relocation against a local symbol if it does not reference | |
6205 | // the GOT. | |
6206 | case elfcpp::R_AARCH64_TSTBR14: | |
6207 | case elfcpp::R_AARCH64_CONDBR19: | |
6208 | case elfcpp::R_AARCH64_JUMP26: | |
6209 | case elfcpp::R_AARCH64_CALL26: | |
6210 | break; | |
6211 | ||
6212 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: | |
6213 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
6214 | { | |
3a531937 JY |
6215 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: |
6216 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
6217 | if (tlsopt == tls::TLSOPT_TO_LE) | |
6218 | break; | |
6219 | ||
8e33481e HS |
6220 | layout->set_has_static_tls(); |
6221 | // Create a GOT entry for the tp-relative offset. | |
8e33481e HS |
6222 | if (!parameters->doing_static_link()) |
6223 | { | |
8032ac03 IK |
6224 | Output_data_got_aarch64<size, big_endian>* got = |
6225 | target->got_section(symtab, layout); | |
8e33481e HS |
6226 | got->add_local_with_rel(object, r_sym, GOT_TYPE_TLS_OFFSET, |
6227 | target->rela_dyn_section(layout), | |
6228 | elfcpp::R_AARCH64_TLS_TPREL64); | |
6229 | } | |
6230 | else if (!object->local_has_got_offset(r_sym, | |
6231 | GOT_TYPE_TLS_OFFSET)) | |
6232 | { | |
8032ac03 IK |
6233 | Output_data_got_aarch64<size, big_endian>* got = |
6234 | target->got_section(symtab, layout); | |
8e33481e HS |
6235 | got->add_local(object, r_sym, GOT_TYPE_TLS_OFFSET); |
6236 | unsigned int got_offset = | |
6237 | object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET); | |
6238 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
6239 | gold_assert(addend == 0); | |
6240 | got->add_static_reloc(got_offset, elfcpp::R_AARCH64_TLS_TPREL64, | |
6241 | object, r_sym); | |
6242 | } | |
6243 | } | |
6244 | break; | |
6245 | ||
3a531937 JY |
6246 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
6247 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
6248 | { | |
6249 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
6250 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
6251 | if (tlsopt == tls::TLSOPT_TO_LE) | |
6252 | { | |
6253 | layout->set_has_static_tls(); | |
6254 | break; | |
6255 | } | |
6256 | gold_assert(tlsopt == tls::TLSOPT_NONE); | |
6257 | ||
8032ac03 IK |
6258 | Output_data_got_aarch64<size, big_endian>* got = |
6259 | target->got_section(symtab, layout); | |
3a531937 JY |
6260 | got->add_local_pair_with_rel(object,r_sym, data_shndx, |
6261 | GOT_TYPE_TLS_PAIR, | |
6262 | target->rela_dyn_section(layout), | |
6263 | elfcpp::R_AARCH64_TLS_DTPMOD64); | |
6264 | } | |
6265 | break; | |
6266 | ||
1a920511 JY |
6267 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2: |
6268 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
6269 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
6270 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
6271 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
8e33481e HS |
6272 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: |
6273 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
6274 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
e82e6b2b CC |
6275 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12: |
6276 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC: | |
6277 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12: | |
6278 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC: | |
6279 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12: | |
6280 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC: | |
6281 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12: | |
6282 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC: | |
8e33481e HS |
6283 | { |
6284 | layout->set_has_static_tls(); | |
6285 | bool output_is_shared = parameters->options().shared(); | |
6286 | if (output_is_shared) | |
3a531937 | 6287 | gold_error(_("%s: unsupported TLSLE reloc %u in shared code."), |
8e33481e HS |
6288 | object->name().c_str(), r_type); |
6289 | } | |
9363c7c3 JY |
6290 | break; |
6291 | ||
9726c3c1 HS |
6292 | case elfcpp::R_AARCH64_TLSLD_ADR_PAGE21: |
6293 | case elfcpp::R_AARCH64_TLSLD_ADD_LO12_NC: | |
6294 | { | |
6295 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
6296 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
6297 | if (tlsopt == tls::TLSOPT_NONE) | |
6298 | { | |
6299 | // Create a GOT entry for the module index. | |
6300 | target->got_mod_index_entry(symtab, layout, object); | |
6301 | } | |
6302 | else if (tlsopt != tls::TLSOPT_TO_LE) | |
6303 | unsupported_reloc_local(object, r_type); | |
6304 | } | |
6305 | break; | |
6306 | ||
6307 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1: | |
6308 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: | |
6b0ad2eb JY |
6309 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12: |
6310 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: | |
9726c3c1 HS |
6311 | break; |
6312 | ||
3a531937 JY |
6313 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
6314 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
6315 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
6316 | { | |
6317 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
6318 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
6319 | target->define_tls_base_symbol(symtab, layout); | |
6320 | if (tlsopt == tls::TLSOPT_NONE) | |
6321 | { | |
6322 | // Create reserved PLT and GOT entries for the resolver. | |
6323 | target->reserve_tlsdesc_entries(symtab, layout); | |
6324 | ||
6325 | // Generate a double GOT entry with an R_AARCH64_TLSDESC reloc. | |
6326 | // The R_AARCH64_TLSDESC reloc is resolved lazily, so the GOT | |
6327 | // entry needs to be in an area in .got.plt, not .got. Call | |
6328 | // got_section to make sure the section has been created. | |
6329 | target->got_section(symtab, layout); | |
6330 | Output_data_got<size, big_endian>* got = | |
6331 | target->got_tlsdesc_section(); | |
6332 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
6333 | if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_DESC)) | |
6334 | { | |
6335 | unsigned int got_offset = got->add_constant(0); | |
6336 | got->add_constant(0); | |
6337 | object->set_local_got_offset(r_sym, GOT_TYPE_TLS_DESC, | |
6338 | got_offset); | |
6339 | Reloc_section* rt = target->rela_tlsdesc_section(layout); | |
6340 | // We store the arguments we need in a vector, and use | |
6341 | // the index into the vector as the parameter to pass | |
6342 | // to the target specific routines. | |
6343 | uintptr_t intarg = target->add_tlsdesc_info(object, r_sym); | |
6344 | void* arg = reinterpret_cast<void*>(intarg); | |
6345 | rt->add_target_specific(elfcpp::R_AARCH64_TLSDESC, arg, | |
6346 | got, got_offset, 0); | |
6347 | } | |
6348 | } | |
6349 | else if (tlsopt != tls::TLSOPT_TO_LE) | |
6350 | unsupported_reloc_local(object, r_type); | |
6351 | } | |
6352 | break; | |
6353 | ||
6354 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
6355 | break; | |
6356 | ||
9363c7c3 JY |
6357 | default: |
6358 | unsupported_reloc_local(object, r_type); | |
053a4d68 JY |
6359 | } |
6360 | } | |
6361 | ||
6362 | ||
6363 | // Report an unsupported relocation against a global symbol. | |
6364 | ||
6365 | template<int size, bool big_endian> | |
6366 | void | |
6367 | Target_aarch64<size, big_endian>::Scan::unsupported_reloc_global( | |
6368 | Sized_relobj_file<size, big_endian>* object, | |
6369 | unsigned int r_type, | |
6370 | Symbol* gsym) | |
6371 | { | |
6372 | gold_error(_("%s: unsupported reloc %u against global symbol %s"), | |
6373 | object->name().c_str(), r_type, gsym->demangled_name().c_str()); | |
6374 | } | |
6375 | ||
6376 | template<int size, bool big_endian> | |
6377 | inline void | |
6378 | Target_aarch64<size, big_endian>::Scan::global( | |
9363c7c3 JY |
6379 | Symbol_table* symtab, |
6380 | Layout* layout, | |
6381 | Target_aarch64<size, big_endian>* target, | |
8e33481e HS |
6382 | Sized_relobj_file<size, big_endian> * object, |
6383 | unsigned int data_shndx, | |
6384 | Output_section* output_section, | |
6385 | const elfcpp::Rela<size, big_endian>& rela, | |
9363c7c3 JY |
6386 | unsigned int r_type, |
6387 | Symbol* gsym) | |
053a4d68 | 6388 | { |
9726c3c1 HS |
6389 | // A STT_GNU_IFUNC symbol may require a PLT entry. |
6390 | if (gsym->type() == elfcpp::STT_GNU_IFUNC | |
6391 | && this->reloc_needs_plt_for_ifunc(object, r_type)) | |
6392 | target->make_plt_entry(symtab, layout, gsym); | |
6393 | ||
8e33481e HS |
6394 | typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> |
6395 | Reloc_section; | |
3a531937 JY |
6396 | const AArch64_reloc_property* arp = |
6397 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
6398 | gold_assert(arp != NULL); | |
6399 | ||
9363c7c3 JY |
6400 | switch (r_type) |
6401 | { | |
5627d875 IK |
6402 | case elfcpp::R_AARCH64_NONE: |
6403 | break; | |
6404 | ||
8e33481e HS |
6405 | case elfcpp::R_AARCH64_ABS16: |
6406 | case elfcpp::R_AARCH64_ABS32: | |
9363c7c3 | 6407 | case elfcpp::R_AARCH64_ABS64: |
8e33481e HS |
6408 | { |
6409 | // Make a PLT entry if necessary. | |
6410 | if (gsym->needs_plt_entry()) | |
6411 | { | |
6412 | target->make_plt_entry(symtab, layout, gsym); | |
6413 | // Since this is not a PC-relative relocation, we may be | |
6414 | // taking the address of a function. In that case we need to | |
6415 | // set the entry in the dynamic symbol table to the address of | |
6416 | // the PLT entry. | |
6417 | if (gsym->is_from_dynobj() && !parameters->options().shared()) | |
6418 | gsym->set_needs_dynsym_value(); | |
6419 | } | |
6420 | // Make a dynamic relocation if necessary. | |
8e33481e HS |
6421 | if (gsym->needs_dynamic_reloc(arp->reference_flags())) |
6422 | { | |
6423 | if (!parameters->options().output_is_position_independent() | |
6424 | && gsym->may_need_copy_reloc()) | |
6425 | { | |
3a531937 JY |
6426 | target->copy_reloc(symtab, layout, object, |
6427 | data_shndx, output_section, gsym, rela); | |
8e33481e | 6428 | } |
9726c3c1 HS |
6429 | else if (r_type == elfcpp::R_AARCH64_ABS64 |
6430 | && gsym->type() == elfcpp::STT_GNU_IFUNC | |
6431 | && gsym->can_use_relative_reloc(false) | |
6432 | && !gsym->is_from_dynobj() | |
6433 | && !gsym->is_undefined() | |
6434 | && !gsym->is_preemptible()) | |
6435 | { | |
6436 | // Use an IRELATIVE reloc for a locally defined STT_GNU_IFUNC | |
6437 | // symbol. This makes a function address in a PIE executable | |
6438 | // match the address in a shared library that it links against. | |
6439 | Reloc_section* rela_dyn = | |
6440 | target->rela_irelative_section(layout); | |
6441 | unsigned int r_type = elfcpp::R_AARCH64_IRELATIVE; | |
6442 | rela_dyn->add_symbolless_global_addend(gsym, r_type, | |
6443 | output_section, object, | |
6444 | data_shndx, | |
6445 | rela.get_r_offset(), | |
6446 | rela.get_r_addend()); | |
6447 | } | |
8e33481e HS |
6448 | else if (r_type == elfcpp::R_AARCH64_ABS64 |
6449 | && gsym->can_use_relative_reloc(false)) | |
6450 | { | |
6451 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); | |
6452 | rela_dyn->add_global_relative(gsym, | |
6453 | elfcpp::R_AARCH64_RELATIVE, | |
6454 | output_section, | |
6455 | object, | |
6456 | data_shndx, | |
6457 | rela.get_r_offset(), | |
6458 | rela.get_r_addend(), | |
6459 | false); | |
6460 | } | |
6461 | else | |
6462 | { | |
6463 | check_non_pic(object, r_type); | |
6464 | Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian>* | |
6465 | rela_dyn = target->rela_dyn_section(layout); | |
6466 | rela_dyn->add_global( | |
6467 | gsym, r_type, output_section, object, | |
6468 | data_shndx, rela.get_r_offset(),rela.get_r_addend()); | |
6469 | } | |
6470 | } | |
6471 | } | |
6472 | break; | |
6473 | ||
6474 | case elfcpp::R_AARCH64_PREL16: | |
6475 | case elfcpp::R_AARCH64_PREL32: | |
6476 | case elfcpp::R_AARCH64_PREL64: | |
9363c7c3 JY |
6477 | // This is used to fill the GOT absolute address. |
6478 | if (gsym->needs_plt_entry()) | |
6479 | { | |
6480 | target->make_plt_entry(symtab, layout, gsym); | |
6481 | } | |
6482 | break; | |
6483 | ||
8769bc4b HS |
6484 | case elfcpp::R_AARCH64_MOVW_UABS_G0: // 263 |
6485 | case elfcpp::R_AARCH64_MOVW_UABS_G0_NC: // 264 | |
6486 | case elfcpp::R_AARCH64_MOVW_UABS_G1: // 265 | |
6487 | case elfcpp::R_AARCH64_MOVW_UABS_G1_NC: // 266 | |
6488 | case elfcpp::R_AARCH64_MOVW_UABS_G2: // 267 | |
6489 | case elfcpp::R_AARCH64_MOVW_UABS_G2_NC: // 268 | |
6490 | case elfcpp::R_AARCH64_MOVW_UABS_G3: // 269 | |
6491 | case elfcpp::R_AARCH64_MOVW_SABS_G0: // 270 | |
6492 | case elfcpp::R_AARCH64_MOVW_SABS_G1: // 271 | |
6493 | case elfcpp::R_AARCH64_MOVW_SABS_G2: // 272 | |
6494 | if (parameters->options().output_is_position_independent()) | |
6495 | { | |
6496 | gold_error(_("%s: unsupported reloc %u in pos independent link."), | |
6497 | object->name().c_str(), r_type); | |
6498 | } | |
6499 | break; | |
6500 | ||
3a531937 JY |
6501 | case elfcpp::R_AARCH64_LD_PREL_LO19: // 273 |
6502 | case elfcpp::R_AARCH64_ADR_PREL_LO21: // 274 | |
6503 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: // 275 | |
6504 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: // 276 | |
6505 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: // 277 | |
6506 | case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC: // 278 | |
6507 | case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC: // 284 | |
6508 | case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC: // 285 | |
6509 | case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC: // 286 | |
8e33481e | 6510 | case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC: // 299 |
9363c7c3 | 6511 | { |
3a531937 JY |
6512 | if (gsym->needs_plt_entry()) |
6513 | target->make_plt_entry(symtab, layout, gsym); | |
6514 | // Make a dynamic relocation if necessary. | |
6515 | if (gsym->needs_dynamic_reloc(arp->reference_flags())) | |
6516 | { | |
6517 | if (parameters->options().output_is_executable() | |
6518 | && gsym->may_need_copy_reloc()) | |
6519 | { | |
6520 | target->copy_reloc(symtab, layout, object, | |
6521 | data_shndx, output_section, gsym, rela); | |
6522 | } | |
6523 | } | |
9363c7c3 JY |
6524 | break; |
6525 | } | |
6526 | ||
6527 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
6528 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
5c28a503 | 6529 | case elfcpp::R_AARCH64_LD64_GOTPAGE_LO15: |
9363c7c3 | 6530 | { |
5c28a503 | 6531 | // The above relocations are used to access GOT entries. |
9363c7c3 JY |
6532 | // Note a GOT entry is an *address* to a symbol. |
6533 | // The symbol requires a GOT entry | |
6534 | Output_data_got_aarch64<size, big_endian>* got = | |
6535 | target->got_section(symtab, layout); | |
6536 | if (gsym->final_value_is_known()) | |
6537 | { | |
9726c3c1 HS |
6538 | // For a STT_GNU_IFUNC symbol we want the PLT address. |
6539 | if (gsym->type() == elfcpp::STT_GNU_IFUNC) | |
6540 | got->add_global_plt(gsym, GOT_TYPE_STANDARD); | |
6541 | else | |
6542 | got->add_global(gsym, GOT_TYPE_STANDARD); | |
9363c7c3 JY |
6543 | } |
6544 | else | |
6545 | { | |
9726c3c1 HS |
6546 | // If this symbol is not fully resolved, we need to add a dynamic |
6547 | // relocation for it. | |
9363c7c3 | 6548 | Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
9726c3c1 HS |
6549 | |
6550 | // Use a GLOB_DAT rather than a RELATIVE reloc if: | |
6551 | // | |
6552 | // 1) The symbol may be defined in some other module. | |
6553 | // 2) We are building a shared library and this is a protected | |
6554 | // symbol; using GLOB_DAT means that the dynamic linker can use | |
6555 | // the address of the PLT in the main executable when appropriate | |
6556 | // so that function address comparisons work. | |
6557 | // 3) This is a STT_GNU_IFUNC symbol in position dependent code, | |
6558 | // again so that function address comparisons work. | |
9363c7c3 JY |
6559 | if (gsym->is_from_dynobj() |
6560 | || gsym->is_undefined() | |
6561 | || gsym->is_preemptible() | |
6562 | || (gsym->visibility() == elfcpp::STV_PROTECTED | |
9726c3c1 HS |
6563 | && parameters->options().shared()) |
6564 | || (gsym->type() == elfcpp::STT_GNU_IFUNC | |
6565 | && parameters->options().output_is_position_independent())) | |
9363c7c3 JY |
6566 | got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, |
6567 | rela_dyn, elfcpp::R_AARCH64_GLOB_DAT); | |
6568 | else | |
6569 | { | |
9726c3c1 HS |
6570 | // For a STT_GNU_IFUNC symbol we want to write the PLT |
6571 | // offset into the GOT, so that function pointer | |
6572 | // comparisons work correctly. | |
6573 | bool is_new; | |
6574 | if (gsym->type() != elfcpp::STT_GNU_IFUNC) | |
6575 | is_new = got->add_global(gsym, GOT_TYPE_STANDARD); | |
6576 | else | |
6577 | { | |
6578 | is_new = got->add_global_plt(gsym, GOT_TYPE_STANDARD); | |
6579 | // Tell the dynamic linker to use the PLT address | |
6580 | // when resolving relocations. | |
6581 | if (gsym->is_from_dynobj() | |
6582 | && !parameters->options().shared()) | |
6583 | gsym->set_needs_dynsym_value(); | |
6584 | } | |
6585 | if (is_new) | |
3a531937 JY |
6586 | { |
6587 | rela_dyn->add_global_relative( | |
6588 | gsym, elfcpp::R_AARCH64_RELATIVE, | |
6589 | got, | |
6590 | gsym->got_offset(GOT_TYPE_STANDARD), | |
6591 | 0, | |
6592 | false); | |
6593 | } | |
9363c7c3 JY |
6594 | } |
6595 | } | |
6596 | break; | |
6597 | } | |
6598 | ||
8e33481e HS |
6599 | case elfcpp::R_AARCH64_TSTBR14: |
6600 | case elfcpp::R_AARCH64_CONDBR19: | |
9363c7c3 JY |
6601 | case elfcpp::R_AARCH64_JUMP26: |
6602 | case elfcpp::R_AARCH64_CALL26: | |
6603 | { | |
6604 | if (gsym->final_value_is_known()) | |
6605 | break; | |
6606 | ||
6607 | if (gsym->is_defined() && | |
6608 | !gsym->is_from_dynobj() && | |
6609 | !gsym->is_preemptible()) | |
6610 | break; | |
6611 | ||
6612 | // Make plt entry for function call. | |
9363c7c3 JY |
6613 | target->make_plt_entry(symtab, layout, gsym); |
6614 | break; | |
6615 | } | |
6616 | ||
3a531937 JY |
6617 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
6618 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: // General dynamic | |
6619 | { | |
6620 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
6621 | optimize_tls_reloc(gsym->final_value_is_known(), r_type); | |
6622 | if (tlsopt == tls::TLSOPT_TO_LE) | |
6623 | { | |
6624 | layout->set_has_static_tls(); | |
6625 | break; | |
6626 | } | |
6627 | gold_assert(tlsopt == tls::TLSOPT_NONE); | |
6628 | ||
6629 | // General dynamic. | |
6630 | Output_data_got_aarch64<size, big_endian>* got = | |
6631 | target->got_section(symtab, layout); | |
6632 | // Create 2 consecutive entries for module index and offset. | |
6633 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR, | |
6634 | target->rela_dyn_section(layout), | |
6635 | elfcpp::R_AARCH64_TLS_DTPMOD64, | |
6636 | elfcpp::R_AARCH64_TLS_DTPREL64); | |
6637 | } | |
6638 | break; | |
6639 | ||
9726c3c1 HS |
6640 | case elfcpp::R_AARCH64_TLSLD_ADR_PAGE21: |
6641 | case elfcpp::R_AARCH64_TLSLD_ADD_LO12_NC: // Local dynamic | |
6642 | { | |
6643 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
6644 | optimize_tls_reloc(!parameters->options().shared(), r_type); | |
6645 | if (tlsopt == tls::TLSOPT_NONE) | |
6646 | { | |
6647 | // Create a GOT entry for the module index. | |
6648 | target->got_mod_index_entry(symtab, layout, object); | |
6649 | } | |
6650 | else if (tlsopt != tls::TLSOPT_TO_LE) | |
6651 | unsupported_reloc_local(object, r_type); | |
6652 | } | |
6653 | break; | |
6654 | ||
6655 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1: | |
6b0ad2eb JY |
6656 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: |
6657 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12: | |
6658 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: // Other local dynamic | |
9726c3c1 HS |
6659 | break; |
6660 | ||
8e33481e | 6661 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
3a531937 | 6662 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: // Initial executable |
8e33481e | 6663 | { |
9726c3c1 | 6664 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: |
3a531937 JY |
6665 | optimize_tls_reloc(gsym->final_value_is_known(), r_type); |
6666 | if (tlsopt == tls::TLSOPT_TO_LE) | |
6667 | break; | |
6668 | ||
8e33481e HS |
6669 | layout->set_has_static_tls(); |
6670 | // Create a GOT entry for the tp-relative offset. | |
6671 | Output_data_got_aarch64<size, big_endian>* got | |
6672 | = target->got_section(symtab, layout); | |
6673 | if (!parameters->doing_static_link()) | |
6674 | { | |
6675 | got->add_global_with_rel( | |
6676 | gsym, GOT_TYPE_TLS_OFFSET, | |
6677 | target->rela_dyn_section(layout), | |
6678 | elfcpp::R_AARCH64_TLS_TPREL64); | |
6679 | } | |
6680 | if (!gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)) | |
6681 | { | |
6682 | got->add_global(gsym, GOT_TYPE_TLS_OFFSET); | |
6683 | unsigned int got_offset = | |
6684 | gsym->got_offset(GOT_TYPE_TLS_OFFSET); | |
6685 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
6686 | gold_assert(addend == 0); | |
6687 | got->add_static_reloc(got_offset, | |
6688 | elfcpp::R_AARCH64_TLS_TPREL64, gsym); | |
6689 | } | |
6690 | } | |
6691 | break; | |
6692 | ||
1a920511 JY |
6693 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2: |
6694 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
6695 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
6696 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
6697 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
8e33481e HS |
6698 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: |
6699 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
e82e6b2b CC |
6700 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: |
6701 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12: | |
6702 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC: | |
6703 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12: | |
6704 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC: | |
6705 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12: | |
6706 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC: | |
6707 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12: | |
6708 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC: // Local executable | |
8e33481e HS |
6709 | layout->set_has_static_tls(); |
6710 | if (parameters->options().shared()) | |
6711 | gold_error(_("%s: unsupported TLSLE reloc type %u in shared objects."), | |
6712 | object->name().c_str(), r_type); | |
6713 | break; | |
6714 | ||
3a531937 JY |
6715 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
6716 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
6717 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: // TLS descriptor | |
6718 | { | |
6719 | target->define_tls_base_symbol(symtab, layout); | |
6720 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
6721 | optimize_tls_reloc(gsym->final_value_is_known(), r_type); | |
6722 | if (tlsopt == tls::TLSOPT_NONE) | |
6723 | { | |
6724 | // Create reserved PLT and GOT entries for the resolver. | |
6725 | target->reserve_tlsdesc_entries(symtab, layout); | |
6726 | ||
6727 | // Create a double GOT entry with an R_AARCH64_TLSDESC | |
6728 | // relocation. The R_AARCH64_TLSDESC is resolved lazily, so the GOT | |
6729 | // entry needs to be in an area in .got.plt, not .got. Call | |
6730 | // got_section to make sure the section has been created. | |
6731 | target->got_section(symtab, layout); | |
6732 | Output_data_got<size, big_endian>* got = | |
6733 | target->got_tlsdesc_section(); | |
6734 | Reloc_section* rt = target->rela_tlsdesc_section(layout); | |
6735 | got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_DESC, rt, | |
6736 | elfcpp::R_AARCH64_TLSDESC, 0); | |
6737 | } | |
6738 | else if (tlsopt == tls::TLSOPT_TO_IE) | |
6739 | { | |
6740 | // Create a GOT entry for the tp-relative offset. | |
6741 | Output_data_got<size, big_endian>* got | |
6742 | = target->got_section(symtab, layout); | |
6743 | got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET, | |
6744 | target->rela_dyn_section(layout), | |
6745 | elfcpp::R_AARCH64_TLS_TPREL64); | |
6746 | } | |
6747 | else if (tlsopt != tls::TLSOPT_TO_LE) | |
6748 | unsupported_reloc_global(object, r_type, gsym); | |
6749 | } | |
6750 | break; | |
6751 | ||
6752 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
6753 | break; | |
6754 | ||
9363c7c3 | 6755 | default: |
8e33481e | 6756 | gold_error(_("%s: unsupported reloc type in global scan"), |
3a531937 JY |
6757 | aarch64_reloc_property_table-> |
6758 | reloc_name_in_error_message(r_type).c_str()); | |
9363c7c3 | 6759 | } |
053a4d68 | 6760 | return; |
9363c7c3 JY |
6761 | } // End of Scan::global |
6762 | ||
3a531937 | 6763 | |
9363c7c3 JY |
6764 | // Create the PLT section. |
6765 | template<int size, bool big_endian> | |
6766 | void | |
6767 | Target_aarch64<size, big_endian>::make_plt_section( | |
6768 | Symbol_table* symtab, Layout* layout) | |
6769 | { | |
6770 | if (this->plt_ == NULL) | |
6771 | { | |
6772 | // Create the GOT section first. | |
6773 | this->got_section(symtab, layout); | |
6774 | ||
3a531937 JY |
6775 | this->plt_ = this->make_data_plt(layout, this->got_, this->got_plt_, |
6776 | this->got_irelative_); | |
9363c7c3 JY |
6777 | |
6778 | layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, | |
6779 | (elfcpp::SHF_ALLOC | |
6780 | | elfcpp::SHF_EXECINSTR), | |
6781 | this->plt_, ORDER_PLT, false); | |
6782 | ||
6783 | // Make the sh_info field of .rela.plt point to .plt. | |
6784 | Output_section* rela_plt_os = this->plt_->rela_plt()->output_section(); | |
6785 | rela_plt_os->set_info_section(this->plt_->output_section()); | |
6786 | } | |
6787 | } | |
6788 | ||
3a531937 JY |
6789 | // Return the section for TLSDESC relocations. |
6790 | ||
6791 | template<int size, bool big_endian> | |
6792 | typename Target_aarch64<size, big_endian>::Reloc_section* | |
6793 | Target_aarch64<size, big_endian>::rela_tlsdesc_section(Layout* layout) const | |
6794 | { | |
6795 | return this->plt_section()->rela_tlsdesc(layout); | |
6796 | } | |
6797 | ||
9363c7c3 JY |
6798 | // Create a PLT entry for a global symbol. |
6799 | ||
6800 | template<int size, bool big_endian> | |
6801 | void | |
6802 | Target_aarch64<size, big_endian>::make_plt_entry( | |
6803 | Symbol_table* symtab, | |
6804 | Layout* layout, | |
6805 | Symbol* gsym) | |
6806 | { | |
6807 | if (gsym->has_plt_offset()) | |
6808 | return; | |
6809 | ||
6810 | if (this->plt_ == NULL) | |
6811 | this->make_plt_section(symtab, layout); | |
6812 | ||
9726c3c1 HS |
6813 | this->plt_->add_entry(symtab, layout, gsym); |
6814 | } | |
6815 | ||
6816 | // Make a PLT entry for a local STT_GNU_IFUNC symbol. | |
6817 | ||
6818 | template<int size, bool big_endian> | |
6819 | void | |
6820 | Target_aarch64<size, big_endian>::make_local_ifunc_plt_entry( | |
6821 | Symbol_table* symtab, Layout* layout, | |
6822 | Sized_relobj_file<size, big_endian>* relobj, | |
6823 | unsigned int local_sym_index) | |
6824 | { | |
6825 | if (relobj->local_has_plt_offset(local_sym_index)) | |
6826 | return; | |
6827 | if (this->plt_ == NULL) | |
6828 | this->make_plt_section(symtab, layout); | |
6829 | unsigned int plt_offset = this->plt_->add_local_ifunc_entry(symtab, layout, | |
6830 | relobj, | |
6831 | local_sym_index); | |
6832 | relobj->set_local_plt_offset(local_sym_index, plt_offset); | |
053a4d68 JY |
6833 | } |
6834 | ||
6835 | template<int size, bool big_endian> | |
6836 | void | |
6837 | Target_aarch64<size, big_endian>::gc_process_relocs( | |
6838 | Symbol_table* symtab, | |
6839 | Layout* layout, | |
6840 | Sized_relobj_file<size, big_endian>* object, | |
6841 | unsigned int data_shndx, | |
6842 | unsigned int sh_type, | |
6843 | const unsigned char* prelocs, | |
6844 | size_t reloc_count, | |
6845 | Output_section* output_section, | |
6846 | bool needs_special_offset_handling, | |
6847 | size_t local_symbol_count, | |
6848 | const unsigned char* plocal_symbols) | |
6849 | { | |
4d625b70 CC |
6850 | typedef Target_aarch64<size, big_endian> Aarch64; |
6851 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
6852 | Classify_reloc; | |
6853 | ||
053a4d68 JY |
6854 | if (sh_type == elfcpp::SHT_REL) |
6855 | { | |
6856 | return; | |
6857 | } | |
6858 | ||
4d625b70 | 6859 | gold::gc_process_relocs<size, big_endian, Aarch64, Scan, Classify_reloc>( |
053a4d68 JY |
6860 | symtab, |
6861 | layout, | |
6862 | this, | |
6863 | object, | |
6864 | data_shndx, | |
6865 | prelocs, | |
6866 | reloc_count, | |
6867 | output_section, | |
6868 | needs_special_offset_handling, | |
6869 | local_symbol_count, | |
6870 | plocal_symbols); | |
6871 | } | |
6872 | ||
6873 | // Scan relocations for a section. | |
6874 | ||
6875 | template<int size, bool big_endian> | |
6876 | void | |
6877 | Target_aarch64<size, big_endian>::scan_relocs( | |
6878 | Symbol_table* symtab, | |
6879 | Layout* layout, | |
6880 | Sized_relobj_file<size, big_endian>* object, | |
6881 | unsigned int data_shndx, | |
6882 | unsigned int sh_type, | |
6883 | const unsigned char* prelocs, | |
6884 | size_t reloc_count, | |
6885 | Output_section* output_section, | |
6886 | bool needs_special_offset_handling, | |
6887 | size_t local_symbol_count, | |
6888 | const unsigned char* plocal_symbols) | |
6889 | { | |
4d625b70 CC |
6890 | typedef Target_aarch64<size, big_endian> Aarch64; |
6891 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> | |
6892 | Classify_reloc; | |
6893 | ||
053a4d68 JY |
6894 | if (sh_type == elfcpp::SHT_REL) |
6895 | { | |
6896 | gold_error(_("%s: unsupported REL reloc section"), | |
6897 | object->name().c_str()); | |
6898 | return; | |
6899 | } | |
4d625b70 CC |
6900 | |
6901 | gold::scan_relocs<size, big_endian, Aarch64, Scan, Classify_reloc>( | |
053a4d68 JY |
6902 | symtab, |
6903 | layout, | |
6904 | this, | |
6905 | object, | |
6906 | data_shndx, | |
6907 | prelocs, | |
6908 | reloc_count, | |
6909 | output_section, | |
6910 | needs_special_offset_handling, | |
6911 | local_symbol_count, | |
6912 | plocal_symbols); | |
6913 | } | |
6914 | ||
3a531937 JY |
6915 | // Return the value to use for a dynamic which requires special |
6916 | // treatment. This is how we support equality comparisons of function | |
6917 | // pointers across shared library boundaries, as described in the | |
6918 | // processor specific ABI supplement. | |
6919 | ||
83a01957 | 6920 | template<int size, bool big_endian> |
3a531937 | 6921 | uint64_t |
83a01957 | 6922 | Target_aarch64<size, big_endian>::do_dynsym_value(const Symbol* gsym) const |
3a531937 JY |
6923 | { |
6924 | gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); | |
6925 | return this->plt_address_for_global(gsym); | |
6926 | } | |
6927 | ||
83a01957 | 6928 | |
053a4d68 JY |
6929 | // Finalize the sections. |
6930 | ||
6931 | template<int size, bool big_endian> | |
6932 | void | |
6933 | Target_aarch64<size, big_endian>::do_finalize_sections( | |
9363c7c3 | 6934 | Layout* layout, |
053a4d68 | 6935 | const Input_objects*, |
9363c7c3 | 6936 | Symbol_table* symtab) |
053a4d68 | 6937 | { |
9363c7c3 JY |
6938 | const Reloc_section* rel_plt = (this->plt_ == NULL |
6939 | ? NULL | |
6940 | : this->plt_->rela_plt()); | |
6941 | layout->add_target_dynamic_tags(false, this->got_plt_, rel_plt, | |
6942 | this->rela_dyn_, true, false); | |
6943 | ||
3a531937 JY |
6944 | // Emit any relocs we saved in an attempt to avoid generating COPY |
6945 | // relocs. | |
6946 | if (this->copy_relocs_.any_saved_relocs()) | |
6947 | this->copy_relocs_.emit(this->rela_dyn_section(layout)); | |
6948 | ||
6949 | // Fill in some more dynamic tags. | |
6950 | Output_data_dynamic* const odyn = layout->dynamic_data(); | |
6951 | if (odyn != NULL) | |
6952 | { | |
6953 | if (this->plt_ != NULL | |
6954 | && this->plt_->output_section() != NULL | |
6955 | && this->plt_ ->has_tlsdesc_entry()) | |
6956 | { | |
6957 | unsigned int plt_offset = this->plt_->get_tlsdesc_plt_offset(); | |
6958 | unsigned int got_offset = this->plt_->get_tlsdesc_got_offset(); | |
6959 | this->got_->finalize_data_size(); | |
6960 | odyn->add_section_plus_offset(elfcpp::DT_TLSDESC_PLT, | |
6961 | this->plt_, plt_offset); | |
6962 | odyn->add_section_plus_offset(elfcpp::DT_TLSDESC_GOT, | |
6963 | this->got_, got_offset); | |
6964 | } | |
6965 | } | |
6966 | ||
9363c7c3 | 6967 | // Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of |
a45a8f91 | 6968 | // the .got section. |
9363c7c3 JY |
6969 | Symbol* sym = this->global_offset_table_; |
6970 | if (sym != NULL) | |
6971 | { | |
a45a8f91 | 6972 | uint64_t data_size = this->got_->current_data_size(); |
9363c7c3 JY |
6973 | symtab->get_sized_symbol<size>(sym)->set_symsize(data_size); |
6974 | ||
6975 | // If the .got section is more than 0x8000 bytes, we add | |
6976 | // 0x8000 to the value of _GLOBAL_OFFSET_TABLE_, so that 16 | |
6977 | // bit relocations have a greater chance of working. | |
6978 | if (data_size >= 0x8000) | |
6979 | symtab->get_sized_symbol<size>(sym)->set_value( | |
6980 | symtab->get_sized_symbol<size>(sym)->value() + 0x8000); | |
6981 | } | |
6982 | ||
6983 | if (parameters->doing_static_link() | |
6984 | && (this->plt_ == NULL || !this->plt_->has_irelative_section())) | |
6985 | { | |
6986 | // If linking statically, make sure that the __rela_iplt symbols | |
6987 | // were defined if necessary, even if we didn't create a PLT. | |
6988 | static const Define_symbol_in_segment syms[] = | |
6989 | { | |
6990 | { | |
6991 | "__rela_iplt_start", // name | |
6992 | elfcpp::PT_LOAD, // segment_type | |
6993 | elfcpp::PF_W, // segment_flags_set | |
6994 | elfcpp::PF(0), // segment_flags_clear | |
6995 | 0, // value | |
6996 | 0, // size | |
6997 | elfcpp::STT_NOTYPE, // type | |
6998 | elfcpp::STB_GLOBAL, // binding | |
6999 | elfcpp::STV_HIDDEN, // visibility | |
7000 | 0, // nonvis | |
7001 | Symbol::SEGMENT_START, // offset_from_base | |
7002 | true // only_if_ref | |
7003 | }, | |
7004 | { | |
7005 | "__rela_iplt_end", // name | |
7006 | elfcpp::PT_LOAD, // segment_type | |
7007 | elfcpp::PF_W, // segment_flags_set | |
7008 | elfcpp::PF(0), // segment_flags_clear | |
7009 | 0, // value | |
7010 | 0, // size | |
7011 | elfcpp::STT_NOTYPE, // type | |
7012 | elfcpp::STB_GLOBAL, // binding | |
7013 | elfcpp::STV_HIDDEN, // visibility | |
7014 | 0, // nonvis | |
7015 | Symbol::SEGMENT_START, // offset_from_base | |
7016 | true // only_if_ref | |
7017 | } | |
7018 | }; | |
7019 | ||
7020 | symtab->define_symbols(layout, 2, syms, | |
7021 | layout->script_options()->saw_sections_clause()); | |
7022 | } | |
7023 | ||
053a4d68 JY |
7024 | return; |
7025 | } | |
7026 | ||
7027 | // Perform a relocation. | |
7028 | ||
7029 | template<int size, bool big_endian> | |
7030 | inline bool | |
7031 | Target_aarch64<size, big_endian>::Relocate::relocate( | |
9363c7c3 | 7032 | const Relocate_info<size, big_endian>* relinfo, |
91a65d2f | 7033 | unsigned int, |
9363c7c3 | 7034 | Target_aarch64<size, big_endian>* target, |
053a4d68 | 7035 | Output_section* , |
9363c7c3 | 7036 | size_t relnum, |
91a65d2f | 7037 | const unsigned char* preloc, |
9363c7c3 JY |
7038 | const Sized_symbol<size>* gsym, |
7039 | const Symbol_value<size>* psymval, | |
7040 | unsigned char* view, | |
7041 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
053a4d68 JY |
7042 | section_size_type /* view_size */) |
7043 | { | |
9363c7c3 JY |
7044 | if (view == NULL) |
7045 | return true; | |
7046 | ||
7047 | typedef AArch64_relocate_functions<size, big_endian> Reloc; | |
7048 | ||
91a65d2f AM |
7049 | const elfcpp::Rela<size, big_endian> rela(preloc); |
7050 | unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); | |
9363c7c3 JY |
7051 | const AArch64_reloc_property* reloc_property = |
7052 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
7053 | ||
7054 | if (reloc_property == NULL) | |
7055 | { | |
7056 | std::string reloc_name = | |
7057 | aarch64_reloc_property_table->reloc_name_in_error_message(r_type); | |
7058 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7059 | _("cannot relocate %s in object file"), | |
7060 | reloc_name.c_str()); | |
7061 | return true; | |
7062 | } | |
7063 | ||
7064 | const Sized_relobj_file<size, big_endian>* object = relinfo->object; | |
7065 | ||
7066 | // Pick the value to use for symbols defined in the PLT. | |
7067 | Symbol_value<size> symval; | |
7068 | if (gsym != NULL | |
7069 | && gsym->use_plt_offset(reloc_property->reference_flags())) | |
7070 | { | |
7071 | symval.set_output_value(target->plt_address_for_global(gsym)); | |
7072 | psymval = &symval; | |
7073 | } | |
7074 | else if (gsym == NULL && psymval->is_ifunc_symbol()) | |
7075 | { | |
7076 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
7077 | if (object->local_has_plt_offset(r_sym)) | |
7078 | { | |
7079 | symval.set_output_value(target->plt_address_for_local(object, r_sym)); | |
7080 | psymval = &symval; | |
7081 | } | |
7082 | } | |
7083 | ||
7084 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
7085 | ||
7086 | // Get the GOT offset if needed. | |
7087 | // For aarch64, the GOT pointer points to the start of the GOT section. | |
7088 | bool have_got_offset = false; | |
7089 | int got_offset = 0; | |
7090 | int got_base = (target->got_ != NULL | |
7091 | ? (target->got_->current_data_size() >= 0x8000 | |
7092 | ? 0x8000 : 0) | |
7093 | : 0); | |
7094 | switch (r_type) | |
7095 | { | |
7096 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G0: | |
7097 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G0_NC: | |
7098 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G1: | |
7099 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G1_NC: | |
7100 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G2: | |
7101 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G2_NC: | |
7102 | case elfcpp::R_AARCH64_MOVW_GOTOFF_G3: | |
7103 | case elfcpp::R_AARCH64_GOTREL64: | |
7104 | case elfcpp::R_AARCH64_GOTREL32: | |
7105 | case elfcpp::R_AARCH64_GOT_LD_PREL19: | |
7106 | case elfcpp::R_AARCH64_LD64_GOTOFF_LO15: | |
7107 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
7108 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
7109 | case elfcpp::R_AARCH64_LD64_GOTPAGE_LO15: | |
7110 | if (gsym != NULL) | |
7111 | { | |
7112 | gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); | |
7113 | got_offset = gsym->got_offset(GOT_TYPE_STANDARD) - got_base; | |
7114 | } | |
7115 | else | |
7116 | { | |
7117 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
7118 | gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); | |
7119 | got_offset = (object->local_got_offset(r_sym, GOT_TYPE_STANDARD) | |
7120 | - got_base); | |
7121 | } | |
7122 | have_got_offset = true; | |
7123 | break; | |
8e33481e | 7124 | |
9363c7c3 JY |
7125 | default: |
7126 | break; | |
7127 | } | |
7128 | ||
7129 | typename Reloc::Status reloc_status = Reloc::STATUS_OKAY; | |
7130 | typename elfcpp::Elf_types<size>::Elf_Addr value; | |
7131 | switch (r_type) | |
7132 | { | |
7133 | case elfcpp::R_AARCH64_NONE: | |
7134 | break; | |
7135 | ||
7136 | case elfcpp::R_AARCH64_ABS64: | |
0eccf19f CC |
7137 | if (!parameters->options().apply_dynamic_relocs() |
7138 | && parameters->options().output_is_position_independent() | |
7139 | && gsym != NULL | |
7140 | && gsym->needs_dynamic_reloc(reloc_property->reference_flags()) | |
7141 | && !gsym->can_use_relative_reloc(false)) | |
7142 | // We have generated an absolute dynamic relocation, so do not | |
7143 | // apply the relocation statically. (Works around bugs in older | |
7144 | // Android dynamic linkers.) | |
7145 | break; | |
9363c7c3 JY |
7146 | reloc_status = Reloc::template rela_ua<64>( |
7147 | view, object, psymval, addend, reloc_property); | |
7148 | break; | |
7149 | ||
7150 | case elfcpp::R_AARCH64_ABS32: | |
0eccf19f CC |
7151 | if (!parameters->options().apply_dynamic_relocs() |
7152 | && parameters->options().output_is_position_independent() | |
7153 | && gsym != NULL | |
7154 | && gsym->needs_dynamic_reloc(reloc_property->reference_flags())) | |
7155 | // We have generated an absolute dynamic relocation, so do not | |
7156 | // apply the relocation statically. (Works around bugs in older | |
7157 | // Android dynamic linkers.) | |
7158 | break; | |
9363c7c3 JY |
7159 | reloc_status = Reloc::template rela_ua<32>( |
7160 | view, object, psymval, addend, reloc_property); | |
7161 | break; | |
7162 | ||
7163 | case elfcpp::R_AARCH64_ABS16: | |
0eccf19f CC |
7164 | if (!parameters->options().apply_dynamic_relocs() |
7165 | && parameters->options().output_is_position_independent() | |
7166 | && gsym != NULL | |
7167 | && gsym->needs_dynamic_reloc(reloc_property->reference_flags())) | |
7168 | // We have generated an absolute dynamic relocation, so do not | |
7169 | // apply the relocation statically. (Works around bugs in older | |
7170 | // Android dynamic linkers.) | |
7171 | break; | |
9363c7c3 JY |
7172 | reloc_status = Reloc::template rela_ua<16>( |
7173 | view, object, psymval, addend, reloc_property); | |
7174 | break; | |
7175 | ||
7176 | case elfcpp::R_AARCH64_PREL64: | |
7177 | reloc_status = Reloc::template pcrela_ua<64>( | |
7178 | view, object, psymval, addend, address, reloc_property); | |
83a01957 | 7179 | break; |
9363c7c3 JY |
7180 | |
7181 | case elfcpp::R_AARCH64_PREL32: | |
7182 | reloc_status = Reloc::template pcrela_ua<32>( | |
7183 | view, object, psymval, addend, address, reloc_property); | |
83a01957 | 7184 | break; |
9363c7c3 JY |
7185 | |
7186 | case elfcpp::R_AARCH64_PREL16: | |
7187 | reloc_status = Reloc::template pcrela_ua<16>( | |
7188 | view, object, psymval, addend, address, reloc_property); | |
83a01957 | 7189 | break; |
9363c7c3 | 7190 | |
8769bc4b HS |
7191 | case elfcpp::R_AARCH64_MOVW_UABS_G0: |
7192 | case elfcpp::R_AARCH64_MOVW_UABS_G0_NC: | |
7193 | case elfcpp::R_AARCH64_MOVW_UABS_G1: | |
7194 | case elfcpp::R_AARCH64_MOVW_UABS_G1_NC: | |
7195 | case elfcpp::R_AARCH64_MOVW_UABS_G2: | |
7196 | case elfcpp::R_AARCH64_MOVW_UABS_G2_NC: | |
7197 | case elfcpp::R_AARCH64_MOVW_UABS_G3: | |
7198 | reloc_status = Reloc::template rela_general<32>( | |
7199 | view, object, psymval, addend, reloc_property); | |
7200 | break; | |
7201 | case elfcpp::R_AARCH64_MOVW_SABS_G0: | |
7202 | case elfcpp::R_AARCH64_MOVW_SABS_G1: | |
7203 | case elfcpp::R_AARCH64_MOVW_SABS_G2: | |
7204 | reloc_status = Reloc::movnz(view, psymval->value(object, addend), | |
7205 | reloc_property); | |
7206 | break; | |
7207 | ||
9726c3c1 HS |
7208 | case elfcpp::R_AARCH64_LD_PREL_LO19: |
7209 | reloc_status = Reloc::template pcrela_general<32>( | |
7210 | view, object, psymval, addend, address, reloc_property); | |
7211 | break; | |
7212 | ||
7213 | case elfcpp::R_AARCH64_ADR_PREL_LO21: | |
7214 | reloc_status = Reloc::adr(view, object, psymval, addend, | |
7215 | address, reloc_property); | |
7216 | break; | |
7217 | ||
9363c7c3 JY |
7218 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21_NC: |
7219 | case elfcpp::R_AARCH64_ADR_PREL_PG_HI21: | |
7220 | reloc_status = Reloc::adrp(view, object, psymval, addend, address, | |
7221 | reloc_property); | |
7222 | break; | |
7223 | ||
7224 | case elfcpp::R_AARCH64_LDST8_ABS_LO12_NC: | |
7225 | case elfcpp::R_AARCH64_LDST16_ABS_LO12_NC: | |
7226 | case elfcpp::R_AARCH64_LDST32_ABS_LO12_NC: | |
7227 | case elfcpp::R_AARCH64_LDST64_ABS_LO12_NC: | |
7228 | case elfcpp::R_AARCH64_LDST128_ABS_LO12_NC: | |
7229 | case elfcpp::R_AARCH64_ADD_ABS_LO12_NC: | |
7230 | reloc_status = Reloc::template rela_general<32>( | |
7231 | view, object, psymval, addend, reloc_property); | |
7232 | break; | |
7233 | ||
3a531937 JY |
7234 | case elfcpp::R_AARCH64_CALL26: |
7235 | if (this->skip_call_tls_get_addr_) | |
7236 | { | |
7237 | // Double check that the TLSGD insn has been optimized away. | |
7238 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
7239 | Insntype insn = elfcpp::Swap<32, big_endian>::readval( | |
7240 | reinterpret_cast<Insntype*>(view)); | |
7241 | gold_assert((insn & 0xff000000) == 0x91000000); | |
7242 | ||
7243 | reloc_status = Reloc::STATUS_OKAY; | |
7244 | this->skip_call_tls_get_addr_ = false; | |
7245 | // Return false to stop further processing this reloc. | |
7246 | return false; | |
7247 | } | |
d8e90251 | 7248 | // Fall through. |
83a01957 HS |
7249 | case elfcpp::R_AARCH64_JUMP26: |
7250 | if (Reloc::maybe_apply_stub(r_type, relinfo, rela, view, address, | |
0bf32ea9 JY |
7251 | gsym, psymval, object, |
7252 | target->stub_group_size_)) | |
83a01957 | 7253 | break; |
d8e90251 | 7254 | // Fall through. |
8e33481e HS |
7255 | case elfcpp::R_AARCH64_TSTBR14: |
7256 | case elfcpp::R_AARCH64_CONDBR19: | |
9363c7c3 JY |
7257 | reloc_status = Reloc::template pcrela_general<32>( |
7258 | view, object, psymval, addend, address, reloc_property); | |
7259 | break; | |
7260 | ||
7261 | case elfcpp::R_AARCH64_ADR_GOT_PAGE: | |
7262 | gold_assert(have_got_offset); | |
7263 | value = target->got_->address() + got_base + got_offset; | |
7264 | reloc_status = Reloc::adrp(view, value + addend, address); | |
7265 | break; | |
7266 | ||
7267 | case elfcpp::R_AARCH64_LD64_GOT_LO12_NC: | |
7268 | gold_assert(have_got_offset); | |
7269 | value = target->got_->address() + got_base + got_offset; | |
7270 | reloc_status = Reloc::template rela_general<32>( | |
7271 | view, value, addend, reloc_property); | |
7272 | break; | |
7273 | ||
5c28a503 HS |
7274 | case elfcpp::R_AARCH64_LD64_GOTPAGE_LO15: |
7275 | { | |
7276 | gold_assert(have_got_offset); | |
7277 | value = target->got_->address() + got_base + got_offset + addend - | |
7278 | Reloc::Page(target->got_->address() + got_base); | |
7279 | if ((value & 7) != 0) | |
7280 | reloc_status = Reloc::STATUS_OVERFLOW; | |
7281 | else | |
7282 | reloc_status = Reloc::template reloc_common<32>( | |
7283 | view, value, reloc_property); | |
7284 | break; | |
7285 | } | |
7286 | ||
3a531937 JY |
7287 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
7288 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
9726c3c1 HS |
7289 | case elfcpp::R_AARCH64_TLSLD_ADR_PAGE21: |
7290 | case elfcpp::R_AARCH64_TLSLD_ADD_LO12_NC: | |
7291 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1: | |
7292 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: | |
6b0ad2eb JY |
7293 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12: |
7294 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: | |
8e33481e HS |
7295 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
7296 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
1a920511 JY |
7297 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2: |
7298 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
7299 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
7300 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
7301 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
8e33481e HS |
7302 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: |
7303 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
7304 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
e82e6b2b CC |
7305 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12: |
7306 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC: | |
7307 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12: | |
7308 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC: | |
7309 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12: | |
7310 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC: | |
7311 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12: | |
7312 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC: | |
3a531937 JY |
7313 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
7314 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
7315 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
7316 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
8e33481e HS |
7317 | reloc_status = relocate_tls(relinfo, target, relnum, rela, r_type, |
7318 | gsym, psymval, view, address); | |
7319 | break; | |
7320 | ||
3a531937 JY |
7321 | // These are dynamic relocations, which are unexpected when linking. |
7322 | case elfcpp::R_AARCH64_COPY: | |
7323 | case elfcpp::R_AARCH64_GLOB_DAT: | |
7324 | case elfcpp::R_AARCH64_JUMP_SLOT: | |
7325 | case elfcpp::R_AARCH64_RELATIVE: | |
7326 | case elfcpp::R_AARCH64_IRELATIVE: | |
7327 | case elfcpp::R_AARCH64_TLS_DTPREL64: | |
7328 | case elfcpp::R_AARCH64_TLS_DTPMOD64: | |
7329 | case elfcpp::R_AARCH64_TLS_TPREL64: | |
7330 | case elfcpp::R_AARCH64_TLSDESC: | |
9363c7c3 | 7331 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
3a531937 | 7332 | _("unexpected reloc %u in object file"), |
9363c7c3 JY |
7333 | r_type); |
7334 | break; | |
3a531937 JY |
7335 | |
7336 | default: | |
7337 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7338 | _("unsupported reloc %s"), | |
7339 | reloc_property->name().c_str()); | |
7340 | break; | |
9363c7c3 JY |
7341 | } |
7342 | ||
7343 | // Report any errors. | |
7344 | switch (reloc_status) | |
7345 | { | |
7346 | case Reloc::STATUS_OKAY: | |
7347 | break; | |
7348 | case Reloc::STATUS_OVERFLOW: | |
7349 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7350 | _("relocation overflow in %s"), | |
7351 | reloc_property->name().c_str()); | |
7352 | break; | |
7353 | case Reloc::STATUS_BAD_RELOC: | |
7354 | gold_error_at_location( | |
7355 | relinfo, | |
7356 | relnum, | |
7357 | rela.get_r_offset(), | |
7358 | _("unexpected opcode while processing relocation %s"), | |
7359 | reloc_property->name().c_str()); | |
7360 | break; | |
7361 | default: | |
7362 | gold_unreachable(); | |
7363 | } | |
7364 | ||
053a4d68 JY |
7365 | return true; |
7366 | } | |
7367 | ||
3a531937 | 7368 | |
8e33481e HS |
7369 | template<int size, bool big_endian> |
7370 | inline | |
83a01957 | 7371 | typename AArch64_relocate_functions<size, big_endian>::Status |
8e33481e | 7372 | Target_aarch64<size, big_endian>::Relocate::relocate_tls( |
83a01957 | 7373 | const Relocate_info<size, big_endian>* relinfo, |
3a531937 JY |
7374 | Target_aarch64<size, big_endian>* target, |
7375 | size_t relnum, | |
7376 | const elfcpp::Rela<size, big_endian>& rela, | |
7377 | unsigned int r_type, const Sized_symbol<size>* gsym, | |
7378 | const Symbol_value<size>* psymval, | |
7379 | unsigned char* view, | |
8e33481e HS |
7380 | typename elfcpp::Elf_types<size>::Elf_Addr address) |
7381 | { | |
83a01957 | 7382 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 | 7383 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; |
8e33481e | 7384 | |
3a531937 JY |
7385 | Output_segment* tls_segment = relinfo->layout->tls_segment(); |
7386 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
7387 | const AArch64_reloc_property* reloc_property = | |
7388 | aarch64_reloc_property_table->get_reloc_property(r_type); | |
8e33481e HS |
7389 | gold_assert(reloc_property != NULL); |
7390 | ||
3a531937 JY |
7391 | const bool is_final = (gsym == NULL |
7392 | ? !parameters->options().shared() | |
7393 | : gsym->final_value_is_known()); | |
7394 | tls::Tls_optimization tlsopt = Target_aarch64<size, big_endian>:: | |
7395 | optimize_tls_reloc(is_final, r_type); | |
7396 | ||
83a01957 | 7397 | Sized_relobj_file<size, big_endian>* object = relinfo->object; |
3a531937 | 7398 | int tls_got_offset_type; |
8e33481e HS |
7399 | switch (r_type) |
7400 | { | |
3a531937 JY |
7401 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: |
7402 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: // Global-dynamic | |
7403 | { | |
7404 | if (tlsopt == tls::TLSOPT_TO_LE) | |
7405 | { | |
7406 | if (tls_segment == NULL) | |
7407 | { | |
7408 | gold_assert(parameters->errors()->error_count() > 0 | |
7409 | || issue_undefined_symbol_error(gsym)); | |
7410 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
7411 | } | |
7412 | return tls_gd_to_le(relinfo, target, rela, r_type, view, | |
7413 | psymval); | |
7414 | } | |
7415 | else if (tlsopt == tls::TLSOPT_NONE) | |
7416 | { | |
7417 | tls_got_offset_type = GOT_TYPE_TLS_PAIR; | |
7418 | // Firstly get the address for the got entry. | |
7419 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; | |
7420 | if (gsym != NULL) | |
7421 | { | |
7422 | gold_assert(gsym->has_got_offset(tls_got_offset_type)); | |
7423 | got_entry_address = target->got_->address() + | |
7424 | gsym->got_offset(tls_got_offset_type); | |
7425 | } | |
7426 | else | |
7427 | { | |
7428 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
7429 | gold_assert( | |
7430 | object->local_has_got_offset(r_sym, tls_got_offset_type)); | |
7431 | got_entry_address = target->got_->address() + | |
7432 | object->local_got_offset(r_sym, tls_got_offset_type); | |
7433 | } | |
7434 | ||
7435 | // Relocate the address into adrp/ld, adrp/add pair. | |
7436 | switch (r_type) | |
7437 | { | |
7438 | case elfcpp::R_AARCH64_TLSGD_ADR_PAGE21: | |
7439 | return aarch64_reloc_funcs::adrp( | |
7440 | view, got_entry_address + addend, address); | |
7441 | ||
7442 | break; | |
7443 | ||
7444 | case elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC: | |
7445 | return aarch64_reloc_funcs::template rela_general<32>( | |
7446 | view, got_entry_address, addend, reloc_property); | |
7447 | break; | |
7448 | ||
7449 | default: | |
9726c3c1 | 7450 | gold_unreachable(); |
3a531937 JY |
7451 | } |
7452 | } | |
7453 | gold_error_at_location(relinfo, relnum, rela.get_r_offset(), | |
7454 | _("unsupported gd_to_ie relaxation on %u"), | |
7455 | r_type); | |
7456 | } | |
7457 | break; | |
7458 | ||
9726c3c1 HS |
7459 | case elfcpp::R_AARCH64_TLSLD_ADR_PAGE21: |
7460 | case elfcpp::R_AARCH64_TLSLD_ADD_LO12_NC: // Local-dynamic | |
7461 | { | |
7462 | if (tlsopt == tls::TLSOPT_TO_LE) | |
7463 | { | |
7464 | if (tls_segment == NULL) | |
7465 | { | |
7466 | gold_assert(parameters->errors()->error_count() > 0 | |
7467 | || issue_undefined_symbol_error(gsym)); | |
7468 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
7469 | } | |
7470 | return this->tls_ld_to_le(relinfo, target, rela, r_type, view, | |
7471 | psymval); | |
7472 | } | |
7473 | ||
7474 | gold_assert(tlsopt == tls::TLSOPT_NONE); | |
7475 | // Relocate the field with the offset of the GOT entry for | |
7476 | // the module index. | |
7477 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; | |
7478 | got_entry_address = (target->got_mod_index_entry(NULL, NULL, NULL) + | |
7479 | target->got_->address()); | |
7480 | ||
7481 | switch (r_type) | |
7482 | { | |
7483 | case elfcpp::R_AARCH64_TLSLD_ADR_PAGE21: | |
7484 | return aarch64_reloc_funcs::adrp( | |
7485 | view, got_entry_address + addend, address); | |
7486 | break; | |
7487 | ||
7488 | case elfcpp::R_AARCH64_TLSLD_ADD_LO12_NC: | |
7489 | return aarch64_reloc_funcs::template rela_general<32>( | |
7490 | view, got_entry_address, addend, reloc_property); | |
7491 | break; | |
7492 | ||
7493 | default: | |
7494 | gold_unreachable(); | |
7495 | } | |
7496 | } | |
7497 | break; | |
7498 | ||
7499 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1: | |
6b0ad2eb JY |
7500 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: |
7501 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12: | |
7502 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: // Other local-dynamic | |
9726c3c1 HS |
7503 | { |
7504 | AArch64_address value = psymval->value(object, 0); | |
7505 | if (tlsopt == tls::TLSOPT_TO_LE) | |
7506 | { | |
7507 | if (tls_segment == NULL) | |
7508 | { | |
7509 | gold_assert(parameters->errors()->error_count() > 0 | |
7510 | || issue_undefined_symbol_error(gsym)); | |
7511 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
7512 | } | |
9726c3c1 HS |
7513 | } |
7514 | switch (r_type) | |
7515 | { | |
7516 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1: | |
7517 | return aarch64_reloc_funcs::movnz(view, value + addend, | |
7518 | reloc_property); | |
7519 | break; | |
7520 | ||
7521 | case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: | |
6b0ad2eb JY |
7522 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12: |
7523 | case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: | |
9726c3c1 HS |
7524 | return aarch64_reloc_funcs::template rela_general<32>( |
7525 | view, value, addend, reloc_property); | |
7526 | break; | |
7527 | ||
7528 | default: | |
7529 | gold_unreachable(); | |
7530 | } | |
7531 | // We should never reach here. | |
7532 | } | |
7533 | break; | |
7534 | ||
8e33481e | 7535 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
3a531937 | 7536 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: // Initial-exec |
8e33481e | 7537 | { |
3a531937 JY |
7538 | if (tlsopt == tls::TLSOPT_TO_LE) |
7539 | { | |
7540 | if (tls_segment == NULL) | |
7541 | { | |
7542 | gold_assert(parameters->errors()->error_count() > 0 | |
7543 | || issue_undefined_symbol_error(gsym)); | |
7544 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
7545 | } | |
7546 | return tls_ie_to_le(relinfo, target, rela, r_type, view, | |
7547 | psymval); | |
7548 | } | |
7549 | tls_got_offset_type = GOT_TYPE_TLS_OFFSET; | |
7550 | ||
7551 | // Firstly get the address for the got entry. | |
8e33481e HS |
7552 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; |
7553 | if (gsym != NULL) | |
7554 | { | |
3a531937 | 7555 | gold_assert(gsym->has_got_offset(tls_got_offset_type)); |
8e33481e | 7556 | got_entry_address = target->got_->address() + |
3a531937 | 7557 | gsym->got_offset(tls_got_offset_type); |
8e33481e HS |
7558 | } |
7559 | else | |
7560 | { | |
7561 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
7562 | gold_assert( | |
3a531937 | 7563 | object->local_has_got_offset(r_sym, tls_got_offset_type)); |
8e33481e | 7564 | got_entry_address = target->got_->address() + |
3a531937 | 7565 | object->local_got_offset(r_sym, tls_got_offset_type); |
8e33481e | 7566 | } |
3a531937 JY |
7567 | // Relocate the address into adrp/ld, adrp/add pair. |
7568 | switch (r_type) | |
8e33481e | 7569 | { |
3a531937 JY |
7570 | case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: |
7571 | return aarch64_reloc_funcs::adrp(view, got_entry_address + addend, | |
7572 | address); | |
7573 | break; | |
7574 | case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: | |
7575 | return aarch64_reloc_funcs::template rela_general<32>( | |
7576 | view, got_entry_address, addend, reloc_property); | |
7577 | default: | |
9726c3c1 | 7578 | gold_unreachable(); |
8e33481e | 7579 | } |
8e33481e | 7580 | } |
3a531937 | 7581 | // We shall never reach here. |
8e33481e HS |
7582 | break; |
7583 | ||
1a920511 JY |
7584 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2: |
7585 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
7586 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: | |
7587 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
7588 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: | |
8e33481e HS |
7589 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12: |
7590 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12: | |
7591 | case elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: | |
e82e6b2b CC |
7592 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12: |
7593 | case elfcpp::R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC: | |
7594 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12: | |
7595 | case elfcpp::R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC: | |
7596 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12: | |
7597 | case elfcpp::R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC: | |
7598 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12: | |
7599 | case elfcpp::R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC: | |
8e33481e | 7600 | { |
8e33481e | 7601 | gold_assert(tls_segment != NULL); |
3a531937 | 7602 | AArch64_address value = psymval->value(object, 0); |
8e33481e HS |
7603 | |
7604 | if (!parameters->options().shared()) | |
7605 | { | |
3a531937 JY |
7606 | AArch64_address aligned_tcb_size = |
7607 | align_address(target->tcb_size(), | |
7608 | tls_segment->maximum_alignment()); | |
1a920511 JY |
7609 | value += aligned_tcb_size; |
7610 | switch (r_type) | |
7611 | { | |
7612 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2: | |
7613 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G1: | |
7614 | case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G0: | |
7615 | return aarch64_reloc_funcs::movnz(view, value + addend, | |
7616 | reloc_property); | |
7617 | default: | |
7618 | return aarch64_reloc_funcs::template | |
7619 | rela_general<32>(view, | |
7620 | value, | |
7621 | addend, | |
7622 | reloc_property); | |
7623 | } | |
8e33481e HS |
7624 | } |
7625 | else | |
7626 | gold_error(_("%s: unsupported reloc %u " | |
7627 | "in non-static TLSLE mode."), | |
7628 | object->name().c_str(), r_type); | |
7629 | } | |
7630 | break; | |
7631 | ||
3a531937 JY |
7632 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: |
7633 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
7634 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
7635 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
7636 | { | |
7637 | if (tlsopt == tls::TLSOPT_TO_LE) | |
7638 | { | |
7639 | if (tls_segment == NULL) | |
7640 | { | |
7641 | gold_assert(parameters->errors()->error_count() > 0 | |
7642 | || issue_undefined_symbol_error(gsym)); | |
7643 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
7644 | } | |
7645 | return tls_desc_gd_to_le(relinfo, target, rela, r_type, | |
7646 | view, psymval); | |
7647 | } | |
7648 | else | |
7649 | { | |
7650 | tls_got_offset_type = (tlsopt == tls::TLSOPT_TO_IE | |
7651 | ? GOT_TYPE_TLS_OFFSET | |
7652 | : GOT_TYPE_TLS_DESC); | |
cefdd1cd | 7653 | int got_tlsdesc_offset = 0; |
3a531937 JY |
7654 | if (r_type != elfcpp::R_AARCH64_TLSDESC_CALL |
7655 | && tlsopt == tls::TLSOPT_NONE) | |
7656 | { | |
7657 | // We created GOT entries in the .got.tlsdesc portion of the | |
7658 | // .got.plt section, but the offset stored in the symbol is the | |
7659 | // offset within .got.tlsdesc. | |
cefdd1cd IK |
7660 | got_tlsdesc_offset = (target->got_tlsdesc_->address() |
7661 | - target->got_->address()); | |
3a531937 JY |
7662 | } |
7663 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address; | |
7664 | if (gsym != NULL) | |
7665 | { | |
7666 | gold_assert(gsym->has_got_offset(tls_got_offset_type)); | |
7667 | got_entry_address = target->got_->address() | |
7668 | + got_tlsdesc_offset | |
7669 | + gsym->got_offset(tls_got_offset_type); | |
7670 | } | |
7671 | else | |
7672 | { | |
7673 | unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); | |
7674 | gold_assert( | |
7675 | object->local_has_got_offset(r_sym, tls_got_offset_type)); | |
7676 | got_entry_address = target->got_->address() + | |
7677 | got_tlsdesc_offset + | |
7678 | object->local_got_offset(r_sym, tls_got_offset_type); | |
7679 | } | |
7680 | if (tlsopt == tls::TLSOPT_TO_IE) | |
7681 | { | |
3a531937 JY |
7682 | return tls_desc_gd_to_ie(relinfo, target, rela, r_type, |
7683 | view, psymval, got_entry_address, | |
7684 | address); | |
7685 | } | |
7686 | ||
7687 | // Now do tlsdesc relocation. | |
7688 | switch (r_type) | |
7689 | { | |
7690 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
7691 | return aarch64_reloc_funcs::adrp(view, | |
7692 | got_entry_address + addend, | |
7693 | address); | |
7694 | break; | |
7695 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
7696 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
7697 | return aarch64_reloc_funcs::template rela_general<32>( | |
7698 | view, got_entry_address, addend, reloc_property); | |
7699 | break; | |
7700 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
7701 | return aarch64_reloc_funcs::STATUS_OKAY; | |
7702 | break; | |
7703 | default: | |
7704 | gold_unreachable(); | |
7705 | } | |
7706 | } | |
7707 | } | |
7708 | break; | |
7709 | ||
8e33481e HS |
7710 | default: |
7711 | gold_error(_("%s: unsupported TLS reloc %u."), | |
7712 | object->name().c_str(), r_type); | |
7713 | } | |
7714 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
3a531937 JY |
7715 | } // End of relocate_tls. |
7716 | ||
7717 | ||
7718 | template<int size, bool big_endian> | |
7719 | inline | |
83a01957 | 7720 | typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 7721 | Target_aarch64<size, big_endian>::Relocate::tls_gd_to_le( |
83a01957 | 7722 | const Relocate_info<size, big_endian>* relinfo, |
3a531937 JY |
7723 | Target_aarch64<size, big_endian>* target, |
7724 | const elfcpp::Rela<size, big_endian>& rela, | |
7725 | unsigned int r_type, | |
7726 | unsigned char* view, | |
7727 | const Symbol_value<size>* psymval) | |
7728 | { | |
83a01957 | 7729 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 JY |
7730 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; |
7731 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
7732 | ||
7733 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
7734 | Insntype insn1 = elfcpp::Swap<32, big_endian>::readval(ip); | |
7735 | Insntype insn2 = elfcpp::Swap<32, big_endian>::readval(ip + 1); | |
7736 | Insntype insn3 = elfcpp::Swap<32, big_endian>::readval(ip + 2); | |
7737 | ||
7738 | if (r_type == elfcpp::R_AARCH64_TLSGD_ADD_LO12_NC) | |
7739 | { | |
7740 | // This is the 2nd relocs, optimization should already have been | |
7741 | // done. | |
7742 | gold_assert((insn1 & 0xfff00000) == 0x91400000); | |
7743 | return aarch64_reloc_funcs::STATUS_OKAY; | |
7744 | } | |
7745 | ||
7746 | // The original sequence is - | |
7747 | // 90000000 adrp x0, 0 <main> | |
7748 | // 91000000 add x0, x0, #0x0 | |
7749 | // 94000000 bl 0 <__tls_get_addr> | |
7750 | // optimized to sequence - | |
7751 | // d53bd040 mrs x0, tpidr_el0 | |
7752 | // 91400000 add x0, x0, #0x0, lsl #12 | |
7753 | // 91000000 add x0, x0, #0x0 | |
7754 | ||
7755 | // Unlike tls_ie_to_le, we change the 3 insns in one function call when we | |
7756 | // encounter the first relocation "R_AARCH64_TLSGD_ADR_PAGE21". Because we | |
7757 | // have to change "bl tls_get_addr", which does not have a corresponding tls | |
7758 | // relocation type. So before proceeding, we need to make sure compiler | |
7759 | // does not change the sequence. | |
7760 | if(!(insn1 == 0x90000000 // adrp x0,0 | |
7761 | && insn2 == 0x91000000 // add x0, x0, #0x0 | |
7762 | && insn3 == 0x94000000)) // bl 0 | |
7763 | { | |
7764 | // Ideally we should give up gd_to_le relaxation and do gd access. | |
7765 | // However the gd_to_le relaxation decision has been made early | |
7766 | // in the scan stage, where we did not allocate any GOT entry for | |
7767 | // this symbol. Therefore we have to exit and report error now. | |
7768 | gold_error(_("unexpected reloc insn sequence while relaxing " | |
7769 | "tls gd to le for reloc %u."), r_type); | |
7770 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
7771 | } | |
7772 | ||
7773 | // Write new insns. | |
7774 | insn1 = 0xd53bd040; // mrs x0, tpidr_el0 | |
7775 | insn2 = 0x91400000; // add x0, x0, #0x0, lsl #12 | |
7776 | insn3 = 0x91000000; // add x0, x0, #0x0 | |
7777 | elfcpp::Swap<32, big_endian>::writeval(ip, insn1); | |
7778 | elfcpp::Swap<32, big_endian>::writeval(ip + 1, insn2); | |
7779 | elfcpp::Swap<32, big_endian>::writeval(ip + 2, insn3); | |
7780 | ||
7781 | // Calculate tprel value. | |
7782 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
7783 | gold_assert(tls_segment != NULL); | |
7784 | AArch64_address value = psymval->value(relinfo->object, 0); | |
7785 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
7786 | AArch64_address aligned_tcb_size = | |
7787 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
7788 | AArch64_address x = value + aligned_tcb_size; | |
7789 | ||
7790 | // After new insns are written, apply TLSLE relocs. | |
7791 | const AArch64_reloc_property* rp1 = | |
7792 | aarch64_reloc_property_table->get_reloc_property( | |
7793 | elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12); | |
7794 | const AArch64_reloc_property* rp2 = | |
7795 | aarch64_reloc_property_table->get_reloc_property( | |
7796 | elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12); | |
7797 | gold_assert(rp1 != NULL && rp2 != NULL); | |
7798 | ||
7799 | typename aarch64_reloc_funcs::Status s1 = | |
7800 | aarch64_reloc_funcs::template rela_general<32>(view + 4, | |
7801 | x, | |
7802 | addend, | |
7803 | rp1); | |
7804 | if (s1 != aarch64_reloc_funcs::STATUS_OKAY) | |
7805 | return s1; | |
7806 | ||
7807 | typename aarch64_reloc_funcs::Status s2 = | |
7808 | aarch64_reloc_funcs::template rela_general<32>(view + 8, | |
7809 | x, | |
7810 | addend, | |
7811 | rp2); | |
7812 | ||
7813 | this->skip_call_tls_get_addr_ = true; | |
7814 | return s2; | |
7815 | } // End of tls_gd_to_le | |
7816 | ||
7817 | ||
9726c3c1 HS |
7818 | template<int size, bool big_endian> |
7819 | inline | |
7820 | typename AArch64_relocate_functions<size, big_endian>::Status | |
7821 | Target_aarch64<size, big_endian>::Relocate::tls_ld_to_le( | |
7822 | const Relocate_info<size, big_endian>* relinfo, | |
7823 | Target_aarch64<size, big_endian>* target, | |
7824 | const elfcpp::Rela<size, big_endian>& rela, | |
7825 | unsigned int r_type, | |
7826 | unsigned char* view, | |
7827 | const Symbol_value<size>* psymval) | |
7828 | { | |
7829 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; | |
7830 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
7831 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
7832 | ||
7833 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
7834 | Insntype insn1 = elfcpp::Swap<32, big_endian>::readval(ip); | |
7835 | Insntype insn2 = elfcpp::Swap<32, big_endian>::readval(ip + 1); | |
7836 | Insntype insn3 = elfcpp::Swap<32, big_endian>::readval(ip + 2); | |
7837 | ||
7838 | if (r_type == elfcpp::R_AARCH64_TLSLD_ADD_LO12_NC) | |
7839 | { | |
7840 | // This is the 2nd relocs, optimization should already have been | |
7841 | // done. | |
7842 | gold_assert((insn1 & 0xfff00000) == 0x91400000); | |
7843 | return aarch64_reloc_funcs::STATUS_OKAY; | |
7844 | } | |
7845 | ||
7846 | // The original sequence is - | |
7847 | // 90000000 adrp x0, 0 <main> | |
7848 | // 91000000 add x0, x0, #0x0 | |
7849 | // 94000000 bl 0 <__tls_get_addr> | |
7850 | // optimized to sequence - | |
7851 | // d53bd040 mrs x0, tpidr_el0 | |
7852 | // 91400000 add x0, x0, #0x0, lsl #12 | |
7853 | // 91000000 add x0, x0, #0x0 | |
7854 | ||
7855 | // Unlike tls_ie_to_le, we change the 3 insns in one function call when we | |
7856 | // encounter the first relocation "R_AARCH64_TLSLD_ADR_PAGE21". Because we | |
7857 | // have to change "bl tls_get_addr", which does not have a corresponding tls | |
7858 | // relocation type. So before proceeding, we need to make sure compiler | |
7859 | // does not change the sequence. | |
7860 | if(!(insn1 == 0x90000000 // adrp x0,0 | |
7861 | && insn2 == 0x91000000 // add x0, x0, #0x0 | |
7862 | && insn3 == 0x94000000)) // bl 0 | |
7863 | { | |
7864 | // Ideally we should give up gd_to_le relaxation and do gd access. | |
7865 | // However the gd_to_le relaxation decision has been made early | |
c092b67b EC |
7866 | // in the scan stage, where we did not allocate a GOT entry for |
7867 | // this symbol. Therefore we have to exit and report an error now. | |
9726c3c1 HS |
7868 | gold_error(_("unexpected reloc insn sequence while relaxing " |
7869 | "tls gd to le for reloc %u."), r_type); | |
7870 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
7871 | } | |
7872 | ||
7873 | // Write new insns. | |
7874 | insn1 = 0xd53bd040; // mrs x0, tpidr_el0 | |
7875 | insn2 = 0x91400000; // add x0, x0, #0x0, lsl #12 | |
7876 | insn3 = 0x91000000; // add x0, x0, #0x0 | |
7877 | elfcpp::Swap<32, big_endian>::writeval(ip, insn1); | |
7878 | elfcpp::Swap<32, big_endian>::writeval(ip + 1, insn2); | |
7879 | elfcpp::Swap<32, big_endian>::writeval(ip + 2, insn3); | |
7880 | ||
7881 | // Calculate tprel value. | |
7882 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
7883 | gold_assert(tls_segment != NULL); | |
7884 | AArch64_address value = psymval->value(relinfo->object, 0); | |
7885 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
7886 | AArch64_address aligned_tcb_size = | |
7887 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
7888 | AArch64_address x = value + aligned_tcb_size; | |
7889 | ||
7890 | // After new insns are written, apply TLSLE relocs. | |
7891 | const AArch64_reloc_property* rp1 = | |
7892 | aarch64_reloc_property_table->get_reloc_property( | |
7893 | elfcpp::R_AARCH64_TLSLE_ADD_TPREL_HI12); | |
7894 | const AArch64_reloc_property* rp2 = | |
7895 | aarch64_reloc_property_table->get_reloc_property( | |
7896 | elfcpp::R_AARCH64_TLSLE_ADD_TPREL_LO12); | |
7897 | gold_assert(rp1 != NULL && rp2 != NULL); | |
7898 | ||
7899 | typename aarch64_reloc_funcs::Status s1 = | |
7900 | aarch64_reloc_funcs::template rela_general<32>(view + 4, | |
7901 | x, | |
7902 | addend, | |
7903 | rp1); | |
7904 | if (s1 != aarch64_reloc_funcs::STATUS_OKAY) | |
7905 | return s1; | |
7906 | ||
7907 | typename aarch64_reloc_funcs::Status s2 = | |
7908 | aarch64_reloc_funcs::template rela_general<32>(view + 8, | |
7909 | x, | |
7910 | addend, | |
7911 | rp2); | |
7912 | ||
7913 | this->skip_call_tls_get_addr_ = true; | |
7914 | return s2; | |
7915 | ||
7916 | } // End of tls_ld_to_le | |
7917 | ||
3a531937 JY |
7918 | template<int size, bool big_endian> |
7919 | inline | |
83a01957 | 7920 | typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 7921 | Target_aarch64<size, big_endian>::Relocate::tls_ie_to_le( |
83a01957 | 7922 | const Relocate_info<size, big_endian>* relinfo, |
3a531937 JY |
7923 | Target_aarch64<size, big_endian>* target, |
7924 | const elfcpp::Rela<size, big_endian>& rela, | |
7925 | unsigned int r_type, | |
7926 | unsigned char* view, | |
7927 | const Symbol_value<size>* psymval) | |
7928 | { | |
7929 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
7930 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
83a01957 | 7931 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 JY |
7932 | |
7933 | AArch64_address value = psymval->value(relinfo->object, 0); | |
7934 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
7935 | AArch64_address aligned_tcb_address = | |
7936 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
7937 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
7938 | AArch64_address x = value + addend + aligned_tcb_address; | |
7939 | // "x" is the offset to tp, we can only do this if x is within | |
7940 | // range [0, 2^32-1] | |
7941 | if (!(size == 32 || (size == 64 && (static_cast<uint64_t>(x) >> 32) == 0))) | |
7942 | { | |
7943 | gold_error(_("TLS variable referred by reloc %u is too far from TP."), | |
7944 | r_type); | |
7945 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
7946 | } | |
7947 | ||
7948 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
7949 | Insntype insn = elfcpp::Swap<32, big_endian>::readval(ip); | |
7950 | unsigned int regno; | |
7951 | Insntype newinsn; | |
7952 | if (r_type == elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21) | |
7953 | { | |
7954 | // Generate movz. | |
7955 | regno = (insn & 0x1f); | |
7956 | newinsn = (0xd2a00000 | regno) | (((x >> 16) & 0xffff) << 5); | |
7957 | } | |
7958 | else if (r_type == elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC) | |
7959 | { | |
7960 | // Generate movk. | |
7961 | regno = (insn & 0x1f); | |
7962 | gold_assert(regno == ((insn >> 5) & 0x1f)); | |
7963 | newinsn = (0xf2800000 | regno) | ((x & 0xffff) << 5); | |
7964 | } | |
7965 | else | |
9726c3c1 | 7966 | gold_unreachable(); |
3a531937 JY |
7967 | |
7968 | elfcpp::Swap<32, big_endian>::writeval(ip, newinsn); | |
7969 | return aarch64_reloc_funcs::STATUS_OKAY; | |
7970 | } // End of tls_ie_to_le | |
7971 | ||
7972 | ||
7973 | template<int size, bool big_endian> | |
7974 | inline | |
83a01957 | 7975 | typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 7976 | Target_aarch64<size, big_endian>::Relocate::tls_desc_gd_to_le( |
83a01957 | 7977 | const Relocate_info<size, big_endian>* relinfo, |
3a531937 JY |
7978 | Target_aarch64<size, big_endian>* target, |
7979 | const elfcpp::Rela<size, big_endian>& rela, | |
7980 | unsigned int r_type, | |
7981 | unsigned char* view, | |
7982 | const Symbol_value<size>* psymval) | |
7983 | { | |
7984 | typedef typename elfcpp::Elf_types<size>::Elf_Addr AArch64_address; | |
7985 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
83a01957 | 7986 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 JY |
7987 | |
7988 | // TLSDESC-GD sequence is like: | |
7989 | // adrp x0, :tlsdesc:v1 | |
7990 | // ldr x1, [x0, #:tlsdesc_lo12:v1] | |
7991 | // add x0, x0, :tlsdesc_lo12:v1 | |
7992 | // .tlsdesccall v1 | |
7993 | // blr x1 | |
7994 | // After desc_gd_to_le optimization, the sequence will be like: | |
7995 | // movz x0, #0x0, lsl #16 | |
7996 | // movk x0, #0x10 | |
7997 | // nop | |
7998 | // nop | |
7999 | ||
8000 | // Calculate tprel value. | |
8001 | Output_segment* tls_segment = relinfo->layout->tls_segment(); | |
8002 | gold_assert(tls_segment != NULL); | |
8003 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
8004 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
8005 | AArch64_address value = psymval->value(relinfo->object, addend); | |
8006 | AArch64_address aligned_tcb_size = | |
8007 | align_address(target->tcb_size(), tls_segment->maximum_alignment()); | |
8008 | AArch64_address x = value + aligned_tcb_size; | |
8009 | // x is the offset to tp, we can only do this if x is within range | |
8010 | // [0, 2^32-1]. If x is out of range, fail and exit. | |
8011 | if (size == 64 && (static_cast<uint64_t>(x) >> 32) != 0) | |
8012 | { | |
8013 | gold_error(_("TLS variable referred by reloc %u is too far from TP. " | |
8014 | "We Can't do gd_to_le relaxation.\n"), r_type); | |
8015 | return aarch64_reloc_funcs::STATUS_BAD_RELOC; | |
8016 | } | |
8017 | Insntype newinsn; | |
8018 | switch (r_type) | |
8019 | { | |
8020 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
8021 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
8022 | // Change to nop | |
8023 | newinsn = 0xd503201f; | |
8024 | break; | |
8025 | ||
8026 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
8027 | // Change to movz. | |
8028 | newinsn = 0xd2a00000 | (((x >> 16) & 0xffff) << 5); | |
8029 | break; | |
8030 | ||
8031 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
8032 | // Change to movk. | |
8033 | newinsn = 0xf2800000 | ((x & 0xffff) << 5); | |
8034 | break; | |
8035 | ||
8036 | default: | |
8037 | gold_error(_("unsupported tlsdesc gd_to_le optimization on reloc %u"), | |
8038 | r_type); | |
8039 | gold_unreachable(); | |
8040 | } | |
8041 | elfcpp::Swap<32, big_endian>::writeval(ip, newinsn); | |
8042 | return aarch64_reloc_funcs::STATUS_OKAY; | |
8043 | } // End of tls_desc_gd_to_le | |
8044 | ||
8045 | ||
8046 | template<int size, bool big_endian> | |
8047 | inline | |
83a01957 | 8048 | typename AArch64_relocate_functions<size, big_endian>::Status |
3a531937 | 8049 | Target_aarch64<size, big_endian>::Relocate::tls_desc_gd_to_ie( |
83a01957 | 8050 | const Relocate_info<size, big_endian>* /* relinfo */, |
3a531937 JY |
8051 | Target_aarch64<size, big_endian>* /* target */, |
8052 | const elfcpp::Rela<size, big_endian>& rela, | |
8053 | unsigned int r_type, | |
8054 | unsigned char* view, | |
8055 | const Symbol_value<size>* /* psymval */, | |
8056 | typename elfcpp::Elf_types<size>::Elf_Addr got_entry_address, | |
8057 | typename elfcpp::Elf_types<size>::Elf_Addr address) | |
8058 | { | |
8059 | typedef typename elfcpp::Swap<32, big_endian>::Valtype Insntype; | |
83a01957 | 8060 | typedef AArch64_relocate_functions<size, big_endian> aarch64_reloc_funcs; |
3a531937 JY |
8061 | |
8062 | // TLSDESC-GD sequence is like: | |
8063 | // adrp x0, :tlsdesc:v1 | |
8064 | // ldr x1, [x0, #:tlsdesc_lo12:v1] | |
8065 | // add x0, x0, :tlsdesc_lo12:v1 | |
8066 | // .tlsdesccall v1 | |
8067 | // blr x1 | |
8068 | // After desc_gd_to_ie optimization, the sequence will be like: | |
8069 | // adrp x0, :tlsie:v1 | |
8070 | // ldr x0, [x0, :tlsie_lo12:v1] | |
8071 | // nop | |
8072 | // nop | |
8073 | ||
8074 | Insntype* ip = reinterpret_cast<Insntype*>(view); | |
8075 | const elfcpp::Elf_Xword addend = rela.get_r_addend(); | |
8076 | Insntype newinsn; | |
8077 | switch (r_type) | |
8078 | { | |
8079 | case elfcpp::R_AARCH64_TLSDESC_ADD_LO12: | |
8080 | case elfcpp::R_AARCH64_TLSDESC_CALL: | |
8081 | // Change to nop | |
8082 | newinsn = 0xd503201f; | |
8083 | elfcpp::Swap<32, big_endian>::writeval(ip, newinsn); | |
8084 | break; | |
8085 | ||
8086 | case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21: | |
8087 | { | |
8088 | return aarch64_reloc_funcs::adrp(view, got_entry_address + addend, | |
8089 | address); | |
8090 | } | |
8091 | break; | |
8092 | ||
8093 | case elfcpp::R_AARCH64_TLSDESC_LD64_LO12: | |
8094 | { | |
bb779192 HS |
8095 | // Set ldr target register to be x0. |
8096 | Insntype insn = elfcpp::Swap<32, big_endian>::readval(ip); | |
8097 | insn &= 0xffffffe0; | |
8098 | elfcpp::Swap<32, big_endian>::writeval(ip, insn); | |
8099 | // Do relocation. | |
3a531937 JY |
8100 | const AArch64_reloc_property* reloc_property = |
8101 | aarch64_reloc_property_table->get_reloc_property( | |
8102 | elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC); | |
8103 | return aarch64_reloc_funcs::template rela_general<32>( | |
8104 | view, got_entry_address, addend, reloc_property); | |
8105 | } | |
8106 | break; | |
8e33481e | 8107 | |
3a531937 JY |
8108 | default: |
8109 | gold_error(_("Don't support tlsdesc gd_to_ie optimization on reloc %u"), | |
8110 | r_type); | |
8111 | gold_unreachable(); | |
8112 | } | |
8113 | return aarch64_reloc_funcs::STATUS_OKAY; | |
8114 | } // End of tls_desc_gd_to_ie | |
8e33481e | 8115 | |
053a4d68 JY |
8116 | // Relocate section data. |
8117 | ||
8118 | template<int size, bool big_endian> | |
8119 | void | |
8120 | Target_aarch64<size, big_endian>::relocate_section( | |
9363c7c3 | 8121 | const Relocate_info<size, big_endian>* relinfo, |
053a4d68 | 8122 | unsigned int sh_type, |
9363c7c3 JY |
8123 | const unsigned char* prelocs, |
8124 | size_t reloc_count, | |
8125 | Output_section* output_section, | |
8126 | bool needs_special_offset_handling, | |
8127 | unsigned char* view, | |
8128 | typename elfcpp::Elf_types<size>::Elf_Addr address, | |
8129 | section_size_type view_size, | |
8130 | const Reloc_symbol_changes* reloc_symbol_changes) | |
053a4d68 | 8131 | { |
6bf56e74 | 8132 | typedef typename elfcpp::Elf_types<size>::Elf_Addr Address; |
4d625b70 | 8133 | typedef Target_aarch64<size, big_endian> Aarch64; |
9363c7c3 | 8134 | typedef typename Target_aarch64<size, big_endian>::Relocate AArch64_relocate; |
4d625b70 CC |
8135 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
8136 | Classify_reloc; | |
8137 | ||
8138 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
8139 | ||
6bf56e74 IK |
8140 | // See if we are relocating a relaxed input section. If so, the view |
8141 | // covers the whole output section and we need to adjust accordingly. | |
8142 | if (needs_special_offset_handling) | |
8143 | { | |
8144 | const Output_relaxed_input_section* poris = | |
8145 | output_section->find_relaxed_input_section(relinfo->object, | |
8146 | relinfo->data_shndx); | |
8147 | if (poris != NULL) | |
8148 | { | |
8149 | Address section_address = poris->address(); | |
8150 | section_size_type section_size = poris->data_size(); | |
8151 | ||
8152 | gold_assert((section_address >= address) | |
8153 | && ((section_address + section_size) | |
8154 | <= (address + view_size))); | |
8155 | ||
8156 | off_t offset = section_address - address; | |
8157 | view += offset; | |
8158 | address += offset; | |
8159 | view_size = section_size; | |
8160 | } | |
8161 | } | |
8162 | ||
4d625b70 CC |
8163 | gold::relocate_section<size, big_endian, Aarch64, AArch64_relocate, |
8164 | gold::Default_comdat_behavior, Classify_reloc>( | |
9363c7c3 JY |
8165 | relinfo, |
8166 | this, | |
8167 | prelocs, | |
8168 | reloc_count, | |
8169 | output_section, | |
8170 | needs_special_offset_handling, | |
8171 | view, | |
8172 | address, | |
8173 | view_size, | |
8174 | reloc_symbol_changes); | |
053a4d68 JY |
8175 | } |
8176 | ||
4d625b70 | 8177 | // Scan the relocs during a relocatable link. |
053a4d68 JY |
8178 | |
8179 | template<int size, bool big_endian> | |
4d625b70 CC |
8180 | void |
8181 | Target_aarch64<size, big_endian>::scan_relocatable_relocs( | |
8182 | Symbol_table* symtab, | |
8183 | Layout* layout, | |
8184 | Sized_relobj_file<size, big_endian>* object, | |
8185 | unsigned int data_shndx, | |
8186 | unsigned int sh_type, | |
8187 | const unsigned char* prelocs, | |
8188 | size_t reloc_count, | |
8189 | Output_section* output_section, | |
8190 | bool needs_special_offset_handling, | |
8191 | size_t local_symbol_count, | |
8192 | const unsigned char* plocal_symbols, | |
8193 | Relocatable_relocs* rr) | |
053a4d68 | 8194 | { |
4d625b70 CC |
8195 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
8196 | Classify_reloc; | |
8197 | typedef gold::Default_scan_relocatable_relocs<Classify_reloc> | |
8198 | Scan_relocatable_relocs; | |
8199 | ||
8200 | gold_assert(sh_type == elfcpp::SHT_RELA); | |
8201 | ||
8202 | gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>( | |
8203 | symtab, | |
8204 | layout, | |
8205 | object, | |
8206 | data_shndx, | |
8207 | prelocs, | |
8208 | reloc_count, | |
8209 | output_section, | |
8210 | needs_special_offset_handling, | |
8211 | local_symbol_count, | |
8212 | plocal_symbols, | |
8213 | rr); | |
053a4d68 JY |
8214 | } |
8215 | ||
4d625b70 | 8216 | // Scan the relocs for --emit-relocs. |
053a4d68 JY |
8217 | |
8218 | template<int size, bool big_endian> | |
8219 | void | |
4d625b70 | 8220 | Target_aarch64<size, big_endian>::emit_relocs_scan( |
8e33481e HS |
8221 | Symbol_table* symtab, |
8222 | Layout* layout, | |
8223 | Sized_relobj_file<size, big_endian>* object, | |
8224 | unsigned int data_shndx, | |
053a4d68 | 8225 | unsigned int sh_type, |
8e33481e HS |
8226 | const unsigned char* prelocs, |
8227 | size_t reloc_count, | |
8228 | Output_section* output_section, | |
8229 | bool needs_special_offset_handling, | |
8230 | size_t local_symbol_count, | |
4d625b70 | 8231 | const unsigned char* plocal_syms, |
8e33481e | 8232 | Relocatable_relocs* rr) |
053a4d68 | 8233 | { |
4d625b70 CC |
8234 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
8235 | Classify_reloc; | |
8236 | typedef gold::Default_emit_relocs_strategy<Classify_reloc> | |
8237 | Emit_relocs_strategy; | |
8e33481e | 8238 | |
4d625b70 | 8239 | gold_assert(sh_type == elfcpp::SHT_RELA); |
8e33481e | 8240 | |
4d625b70 | 8241 | gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( |
8e33481e HS |
8242 | symtab, |
8243 | layout, | |
8244 | object, | |
8245 | data_shndx, | |
8246 | prelocs, | |
8247 | reloc_count, | |
8248 | output_section, | |
8249 | needs_special_offset_handling, | |
8250 | local_symbol_count, | |
4d625b70 | 8251 | plocal_syms, |
8e33481e | 8252 | rr); |
053a4d68 JY |
8253 | } |
8254 | ||
8255 | // Relocate a section during a relocatable link. | |
8256 | ||
8257 | template<int size, bool big_endian> | |
8258 | void | |
8259 | Target_aarch64<size, big_endian>::relocate_relocs( | |
8e33481e | 8260 | const Relocate_info<size, big_endian>* relinfo, |
053a4d68 | 8261 | unsigned int sh_type, |
8e33481e HS |
8262 | const unsigned char* prelocs, |
8263 | size_t reloc_count, | |
8264 | Output_section* output_section, | |
8265 | typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, | |
8e33481e HS |
8266 | unsigned char* view, |
8267 | typename elfcpp::Elf_types<size>::Elf_Addr view_address, | |
8268 | section_size_type view_size, | |
8269 | unsigned char* reloc_view, | |
8270 | section_size_type reloc_view_size) | |
053a4d68 | 8271 | { |
4d625b70 CC |
8272 | typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
8273 | Classify_reloc; | |
8274 | ||
053a4d68 | 8275 | gold_assert(sh_type == elfcpp::SHT_RELA); |
8e33481e | 8276 | |
4d625b70 | 8277 | gold::relocate_relocs<size, big_endian, Classify_reloc>( |
8e33481e HS |
8278 | relinfo, |
8279 | prelocs, | |
8280 | reloc_count, | |
8281 | output_section, | |
8282 | offset_in_output_section, | |
8e33481e HS |
8283 | view, |
8284 | view_address, | |
8285 | view_size, | |
8286 | reloc_view, | |
8287 | reloc_view_size); | |
053a4d68 JY |
8288 | } |
8289 | ||
83a01957 | 8290 | |
5019d64a HS |
8291 | // Return whether this is a 3-insn erratum sequence. |
8292 | ||
8293 | template<int size, bool big_endian> | |
8294 | bool | |
8295 | Target_aarch64<size, big_endian>::is_erratum_843419_sequence( | |
8296 | typename elfcpp::Swap<32,big_endian>::Valtype insn1, | |
8297 | typename elfcpp::Swap<32,big_endian>::Valtype insn2, | |
8298 | typename elfcpp::Swap<32,big_endian>::Valtype insn3) | |
8299 | { | |
8300 | unsigned rt1, rt2; | |
8301 | bool load, pair; | |
8302 | ||
8303 | // The 2nd insn is a single register load or store; or register pair | |
8304 | // store. | |
8305 | if (Insn_utilities::aarch64_mem_op_p(insn2, &rt1, &rt2, &pair, &load) | |
8306 | && (!pair || (pair && !load))) | |
8307 | { | |
8308 | // The 3rd insn is a load or store instruction from the "Load/store | |
8309 | // register (unsigned immediate)" encoding class, using Rn as the | |
8310 | // base address register. | |
8311 | if (Insn_utilities::aarch64_ldst_uimm(insn3) | |
8312 | && (Insn_utilities::aarch64_rn(insn3) | |
8313 | == Insn_utilities::aarch64_rd(insn1))) | |
8314 | return true; | |
8315 | } | |
8316 | return false; | |
8317 | } | |
8318 | ||
8319 | ||
2f0c79aa HS |
8320 | // Return whether this is a 835769 sequence. |
8321 | // (Similarly implemented as in elfnn-aarch64.c.) | |
8322 | ||
8323 | template<int size, bool big_endian> | |
8324 | bool | |
8325 | Target_aarch64<size, big_endian>::is_erratum_835769_sequence( | |
8326 | typename elfcpp::Swap<32,big_endian>::Valtype insn1, | |
8327 | typename elfcpp::Swap<32,big_endian>::Valtype insn2) | |
8328 | { | |
8329 | uint32_t rt; | |
24228130 | 8330 | uint32_t rt2 = 0; |
2f0c79aa HS |
8331 | uint32_t rn; |
8332 | uint32_t rm; | |
8333 | uint32_t ra; | |
8334 | bool pair; | |
8335 | bool load; | |
8336 | ||
8337 | if (Insn_utilities::aarch64_mlxl(insn2) | |
8338 | && Insn_utilities::aarch64_mem_op_p (insn1, &rt, &rt2, &pair, &load)) | |
8339 | { | |
8340 | /* Any SIMD memory op is independent of the subsequent MLA | |
8341 | by definition of the erratum. */ | |
8342 | if (Insn_utilities::aarch64_bit(insn1, 26)) | |
8343 | return true; | |
8344 | ||
8345 | /* If not SIMD, check for integer memory ops and MLA relationship. */ | |
8346 | rn = Insn_utilities::aarch64_rn(insn2); | |
8347 | ra = Insn_utilities::aarch64_ra(insn2); | |
8348 | rm = Insn_utilities::aarch64_rm(insn2); | |
8349 | ||
8350 | /* If this is a load and there's a true(RAW) dependency, we are safe | |
8351 | and this is not an erratum sequence. */ | |
8352 | if (load && | |
8353 | (rt == rn || rt == rm || rt == ra | |
8354 | || (pair && (rt2 == rn || rt2 == rm || rt2 == ra)))) | |
8355 | return false; | |
8356 | ||
8357 | /* We conservatively put out stubs for all other cases (including | |
8358 | writebacks). */ | |
8359 | return true; | |
8360 | } | |
8361 | ||
8362 | return false; | |
8363 | } | |
8364 | ||
8365 | ||
8366 | // Helper method to create erratum stub for ST_E_843419 and ST_E_835769. | |
8367 | ||
8368 | template<int size, bool big_endian> | |
8369 | void | |
8370 | Target_aarch64<size, big_endian>::create_erratum_stub( | |
8371 | AArch64_relobj<size, big_endian>* relobj, | |
8372 | unsigned int shndx, | |
8373 | section_size_type erratum_insn_offset, | |
8374 | Address erratum_address, | |
8375 | typename Insn_utilities::Insntype erratum_insn, | |
0ef3814f HS |
8376 | int erratum_type, |
8377 | unsigned int e843419_adrp_offset) | |
2f0c79aa HS |
8378 | { |
8379 | gold_assert(erratum_type == ST_E_843419 || erratum_type == ST_E_835769); | |
8380 | The_stub_table* stub_table = relobj->stub_table(shndx); | |
8381 | gold_assert(stub_table != NULL); | |
8382 | if (stub_table->find_erratum_stub(relobj, | |
8383 | shndx, | |
8384 | erratum_insn_offset) == NULL) | |
8385 | { | |
8386 | const int BPI = AArch64_insn_utilities<big_endian>::BYTES_PER_INSN; | |
0ef3814f HS |
8387 | The_erratum_stub* stub; |
8388 | if (erratum_type == ST_E_835769) | |
8389 | stub = new The_erratum_stub(relobj, erratum_type, shndx, | |
8390 | erratum_insn_offset); | |
8391 | else if (erratum_type == ST_E_843419) | |
8392 | stub = new E843419_stub<size, big_endian>( | |
8393 | relobj, shndx, erratum_insn_offset, e843419_adrp_offset); | |
8394 | else | |
8395 | gold_unreachable(); | |
2f0c79aa HS |
8396 | stub->set_erratum_insn(erratum_insn); |
8397 | stub->set_erratum_address(erratum_address); | |
8398 | // For erratum ST_E_843419 and ST_E_835769, the destination address is | |
8399 | // always the next insn after erratum insn. | |
8400 | stub->set_destination_address(erratum_address + BPI); | |
8401 | stub_table->add_erratum_stub(stub); | |
8402 | } | |
8403 | } | |
8404 | ||
8405 | ||
8406 | // Scan erratum for section SHNDX range [output_address + span_start, | |
8407 | // output_address + span_end). Note here we do not share the code with | |
8408 | // scan_erratum_843419_span function, because for 843419 we optimize by only | |
8409 | // scanning the last few insns of a page, whereas for 835769, we need to scan | |
8410 | // every insn. | |
8411 | ||
8412 | template<int size, bool big_endian> | |
8413 | void | |
8414 | Target_aarch64<size, big_endian>::scan_erratum_835769_span( | |
8415 | AArch64_relobj<size, big_endian>* relobj, | |
8416 | unsigned int shndx, | |
8417 | const section_size_type span_start, | |
8418 | const section_size_type span_end, | |
8419 | unsigned char* input_view, | |
8420 | Address output_address) | |
8421 | { | |
8422 | typedef typename Insn_utilities::Insntype Insntype; | |
8423 | ||
8424 | const int BPI = AArch64_insn_utilities<big_endian>::BYTES_PER_INSN; | |
8425 | ||
8426 | // Adjust output_address and view to the start of span. | |
8427 | output_address += span_start; | |
8428 | input_view += span_start; | |
8429 | ||
8430 | section_size_type span_length = span_end - span_start; | |
8431 | section_size_type offset = 0; | |
8432 | for (offset = 0; offset + BPI < span_length; offset += BPI) | |
8433 | { | |
8434 | Insntype* ip = reinterpret_cast<Insntype*>(input_view + offset); | |
8435 | Insntype insn1 = ip[0]; | |
8436 | Insntype insn2 = ip[1]; | |
8437 | if (is_erratum_835769_sequence(insn1, insn2)) | |
8438 | { | |
8439 | Insntype erratum_insn = insn2; | |
8440 | // "span_start + offset" is the offset for insn1. So for insn2, it is | |
8441 | // "span_start + offset + BPI". | |
8442 | section_size_type erratum_insn_offset = span_start + offset + BPI; | |
8443 | Address erratum_address = output_address + offset + BPI; | |
73854cdd | 8444 | gold_info(_("Erratum 835769 found and fixed at \"%s\", " |
2f0c79aa HS |
8445 | "section %d, offset 0x%08x."), |
8446 | relobj->name().c_str(), shndx, | |
8447 | (unsigned int)(span_start + offset)); | |
8448 | ||
8449 | this->create_erratum_stub(relobj, shndx, | |
8450 | erratum_insn_offset, erratum_address, | |
8451 | erratum_insn, ST_E_835769); | |
8452 | offset += BPI; // Skip mac insn. | |
8453 | } | |
8454 | } | |
8455 | } // End of "Target_aarch64::scan_erratum_835769_span". | |
8456 | ||
8457 | ||
5019d64a HS |
8458 | // Scan erratum for section SHNDX range |
8459 | // [output_address + span_start, output_address + span_end). | |
8460 | ||
8461 | template<int size, bool big_endian> | |
8462 | void | |
8463 | Target_aarch64<size, big_endian>::scan_erratum_843419_span( | |
8464 | AArch64_relobj<size, big_endian>* relobj, | |
8465 | unsigned int shndx, | |
8466 | const section_size_type span_start, | |
8467 | const section_size_type span_end, | |
8468 | unsigned char* input_view, | |
8469 | Address output_address) | |
8470 | { | |
8471 | typedef typename Insn_utilities::Insntype Insntype; | |
8472 | ||
8473 | // Adjust output_address and view to the start of span. | |
8474 | output_address += span_start; | |
8475 | input_view += span_start; | |
8476 | ||
8477 | if ((output_address & 0x03) != 0) | |
8478 | return; | |
8479 | ||
8480 | section_size_type offset = 0; | |
8481 | section_size_type span_length = span_end - span_start; | |
8482 | // The first instruction must be ending at 0xFF8 or 0xFFC. | |
8483 | unsigned int page_offset = output_address & 0xFFF; | |
8484 | // Make sure starting position, that is "output_address+offset", | |
8485 | // starts at page position 0xff8 or 0xffc. | |
8486 | if (page_offset < 0xff8) | |
8487 | offset = 0xff8 - page_offset; | |
8488 | while (offset + 3 * Insn_utilities::BYTES_PER_INSN <= span_length) | |
8489 | { | |
8490 | Insntype* ip = reinterpret_cast<Insntype*>(input_view + offset); | |
8491 | Insntype insn1 = ip[0]; | |
8492 | if (Insn_utilities::is_adrp(insn1)) | |
8493 | { | |
8494 | Insntype insn2 = ip[1]; | |
8495 | Insntype insn3 = ip[2]; | |
a48d0c12 HS |
8496 | Insntype erratum_insn; |
8497 | unsigned insn_offset; | |
5019d64a HS |
8498 | bool do_report = false; |
8499 | if (is_erratum_843419_sequence(insn1, insn2, insn3)) | |
a48d0c12 HS |
8500 | { |
8501 | do_report = true; | |
8502 | erratum_insn = insn3; | |
8503 | insn_offset = 2 * Insn_utilities::BYTES_PER_INSN; | |
8504 | } | |
5019d64a HS |
8505 | else if (offset + 4 * Insn_utilities::BYTES_PER_INSN <= span_length) |
8506 | { | |
8507 | // Optionally we can have an insn between ins2 and ins3 | |
8508 | Insntype insn_opt = ip[2]; | |
8509 | // And insn_opt must not be a branch. | |
8510 | if (!Insn_utilities::aarch64_b(insn_opt) | |
8511 | && !Insn_utilities::aarch64_bl(insn_opt) | |
8512 | && !Insn_utilities::aarch64_blr(insn_opt) | |
8513 | && !Insn_utilities::aarch64_br(insn_opt)) | |
8514 | { | |
8515 | // And insn_opt must not write to dest reg in insn1. However | |
8516 | // we do a conservative scan, which means we may fix/report | |
8517 | // more than necessary, but it doesn't hurt. | |
8518 | ||
8519 | Insntype insn4 = ip[3]; | |
8520 | if (is_erratum_843419_sequence(insn1, insn2, insn4)) | |
a48d0c12 HS |
8521 | { |
8522 | do_report = true; | |
8523 | erratum_insn = insn4; | |
8524 | insn_offset = 3 * Insn_utilities::BYTES_PER_INSN; | |
8525 | } | |
5019d64a HS |
8526 | } |
8527 | } | |
8528 | if (do_report) | |
8529 | { | |
2f0c79aa | 8530 | unsigned int erratum_insn_offset = |
a48d0c12 | 8531 | span_start + offset + insn_offset; |
2f0c79aa HS |
8532 | Address erratum_address = |
8533 | output_address + offset + insn_offset; | |
8534 | create_erratum_stub(relobj, shndx, | |
8535 | erratum_insn_offset, erratum_address, | |
0ef3814f HS |
8536 | erratum_insn, ST_E_843419, |
8537 | span_start + offset); | |
5019d64a HS |
8538 | } |
8539 | } | |
8540 | ||
8541 | // Advance to next candidate instruction. We only consider instruction | |
8542 | // sequences starting at a page offset of 0xff8 or 0xffc. | |
8543 | page_offset = (output_address + offset) & 0xfff; | |
8544 | if (page_offset == 0xff8) | |
8545 | offset += 4; | |
8546 | else // (page_offset == 0xffc), we move to next page's 0xff8. | |
8547 | offset += 0xffc; | |
8548 | } | |
a48d0c12 | 8549 | } // End of "Target_aarch64::scan_erratum_843419_span". |
5019d64a HS |
8550 | |
8551 | ||
053a4d68 JY |
8552 | // The selector for aarch64 object files. |
8553 | ||
8554 | template<int size, bool big_endian> | |
8555 | class Target_selector_aarch64 : public Target_selector | |
8556 | { | |
8557 | public: | |
9363c7c3 | 8558 | Target_selector_aarch64(); |
053a4d68 JY |
8559 | |
8560 | virtual Target* | |
8561 | do_instantiate_target() | |
8562 | { return new Target_aarch64<size, big_endian>(); } | |
8563 | }; | |
8564 | ||
9363c7c3 JY |
8565 | template<> |
8566 | Target_selector_aarch64<32, true>::Target_selector_aarch64() | |
8567 | : Target_selector(elfcpp::EM_AARCH64, 32, true, | |
8568 | "elf32-bigaarch64", "aarch64_elf32_be_vec") | |
8569 | { } | |
8570 | ||
8571 | template<> | |
8572 | Target_selector_aarch64<32, false>::Target_selector_aarch64() | |
8573 | : Target_selector(elfcpp::EM_AARCH64, 32, false, | |
8574 | "elf32-littleaarch64", "aarch64_elf32_le_vec") | |
8575 | { } | |
8576 | ||
8577 | template<> | |
8578 | Target_selector_aarch64<64, true>::Target_selector_aarch64() | |
8579 | : Target_selector(elfcpp::EM_AARCH64, 64, true, | |
8580 | "elf64-bigaarch64", "aarch64_elf64_be_vec") | |
8581 | { } | |
8582 | ||
8583 | template<> | |
8584 | Target_selector_aarch64<64, false>::Target_selector_aarch64() | |
8585 | : Target_selector(elfcpp::EM_AARCH64, 64, false, | |
8586 | "elf64-littleaarch64", "aarch64_elf64_le_vec") | |
8587 | { } | |
8588 | ||
053a4d68 JY |
8589 | Target_selector_aarch64<32, true> target_selector_aarch64elf32b; |
8590 | Target_selector_aarch64<32, false> target_selector_aarch64elf32; | |
8591 | Target_selector_aarch64<64, true> target_selector_aarch64elfb; | |
8592 | Target_selector_aarch64<64, false> target_selector_aarch64elf; | |
8593 | ||
053a4d68 | 8594 | } // End anonymous namespace. |