1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2015 Free Software Foundation, Inc.
3 Contributed by ARM Ltd.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not,
19 see <http://www.gnu.org/licenses/>. */
21 /* Notes on implementation:
23 Thread Local Store (TLS)
27 The implementation currently supports both traditional TLS and TLS
28 descriptors, but only general dynamic (GD).
30 For traditional TLS the assembler will present us with code
31 fragments of the form:
34 R_AARCH64_TLSGD_ADR_PAGE21(foo)
35 add x0, :tlsgd_lo12:foo
36 R_AARCH64_TLSGD_ADD_LO12_NC(foo)
40 For TLS descriptors the assembler will present us with code
41 fragments of the form:
43 adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE21(foo)
44 ldr x1, [x0, #:tlsdesc_lo12:foo] R_AARCH64_TLSDESC_LD64_LO12(foo)
45 add x0, x0, #:tlsdesc_lo12:foo R_AARCH64_TLSDESC_ADD_LO12(foo)
47 blr x1 R_AARCH64_TLSDESC_CALL(foo)
49 The relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} against foo
50 indicate that foo is thread local and should be accessed via the
51 traditional TLS mechanims.
53 The relocations R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC}
54 against foo indicate that 'foo' is thread local and should be accessed
55 via a TLS descriptor mechanism.
57 The precise instruction sequence is only relevant from the
58 perspective of linker relaxation which is currently not implemented.
60 The static linker must detect that 'foo' is a TLS object and
61 allocate a double GOT entry. The GOT entry must be created for both
62 global and local TLS symbols. Note that this is different to none
63 TLS local objects which do not need a GOT entry.
65 In the traditional TLS mechanism, the double GOT entry is used to
66 provide the tls_index structure, containing module and offset
67 entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD
68 on the module entry. The loader will subsequently fixup this
69 relocation with the module identity.
71 For global traditional TLS symbols the static linker places an
72 R_AARCH64_TLS_DTPREL relocation on the offset entry. The loader
73 will subsequently fixup the offset. For local TLS symbols the static
74 linker fixes up offset.
76 In the TLS descriptor mechanism the double GOT entry is used to
77 provide the descriptor. The static linker places the relocation
78 R_AARCH64_TLSDESC on the first GOT slot. The loader will
79 subsequently fix this up.
83 The handling of TLS symbols is implemented across a number of
84 different backend functions. The following is a top level view of
85 what processing is performed where.
87 The TLS implementation maintains state information for each TLS
88 symbol. The state information for local and global symbols is kept
89 in different places. Global symbols use generic BFD structures while
90 local symbols use backend specific structures that are allocated and
91 maintained entirely by the backend.
95 elfNN_aarch64_check_relocs()
97 This function is invoked for each relocation.
99 The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and
100 R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} are
101 spotted. One time creation of local symbol data structures are
102 created when the first local symbol is seen.
104 The reference count for a symbol is incremented. The GOT type for
105 each symbol is marked as general dynamic.
107 elfNN_aarch64_allocate_dynrelocs ()
109 For each global with positive reference count we allocate a double
110 GOT slot. For a traditional TLS symbol we allocate space for two
111 relocation entries on the GOT, for a TLS descriptor symbol we
112 allocate space for one relocation on the slot. Record the GOT offset
115 elfNN_aarch64_size_dynamic_sections ()
117 Iterate all input BFDS, look for in the local symbol data structure
118 constructed earlier for local TLS symbols and allocate them double
119 GOT slots along with space for a single GOT relocation. Update the
120 local symbol structure to record the GOT offset allocated.
122 elfNN_aarch64_relocate_section ()
124 Calls elfNN_aarch64_final_link_relocate ()
126 Emit the relevant TLS relocations against the GOT for each TLS
127 symbol. For local TLS symbols emit the GOT offset directly. The GOT
128 relocations are emitted once the first time a TLS symbol is
129 encountered. The implementation uses the LSB of the GOT offset to
130 flag that the relevant GOT relocations for a symbol have been
131 emitted. All of the TLS code that uses the GOT offset needs to take
132 care to mask out this flag bit before using the offset.
134 elfNN_aarch64_final_link_relocate ()
136 Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */
140 #include "libiberty.h"
142 #include "bfd_stdint.h"
145 #include "objalloc.h"
146 #include "elf/aarch64.h"
147 #include "elfxx-aarch64.h"
152 #define AARCH64_R(NAME) R_AARCH64_ ## NAME
153 #define AARCH64_R_STR(NAME) "R_AARCH64_" #NAME
154 #define HOWTO64(...) HOWTO (__VA_ARGS__)
155 #define HOWTO32(...) EMPTY_HOWTO (0)
156 #define LOG_FILE_ALIGN 3
160 #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
161 #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME
162 #define HOWTO64(...) EMPTY_HOWTO (0)
163 #define HOWTO32(...) HOWTO (__VA_ARGS__)
164 #define LOG_FILE_ALIGN 2
167 #define IS_AARCH64_TLS_RELOC(R_TYPE) \
168 ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
169 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
170 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
171 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
182 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
183 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
184 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
186 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
187 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
188 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
190 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
191 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
192 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
193 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
194 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
195 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
201 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
202 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC)
204 #define ELIMINATE_COPY_RELOCS 0
206 /* Return size of a relocation entry. HTAB is the bfd's
207 elf_aarch64_link_hash_entry. */
208 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
210 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
211 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
212 #define PLT_ENTRY_SIZE (32)
213 #define PLT_SMALL_ENTRY_SIZE (16)
214 #define PLT_TLSDESC_ENTRY_SIZE (32)
216 /* Encoding of the nop instruction */
217 #define INSN_NOP 0xd503201f
219 #define aarch64_compute_jump_table_size(htab) \
220 (((htab)->root.srelplt == NULL) ? 0 \
221 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
223 /* The first entry in a procedure linkage table looks like this
224 if the distance between the PLTGOT and the PLT is < 4GB use
225 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
226 in x16 and needs to work out PLTGOT[1] by using an address of
227 [x16,#-GOT_ENTRY_SIZE]. */
228 static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] =
230 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
231 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
233 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
234 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
236 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
237 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
239 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
240 0x1f, 0x20, 0x03, 0xd5, /* nop */
241 0x1f, 0x20, 0x03, 0xd5, /* nop */
242 0x1f, 0x20, 0x03, 0xd5, /* nop */
245 /* Per function entry in a procedure linkage table looks like this
246 if the distance between the PLTGOT and the PLT is < 4GB use
247 these PLT entries. */
248 static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] =
250 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
252 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
253 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
255 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
256 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
258 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
261 static const bfd_byte
262 elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
264 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
265 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
266 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
268 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
269 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
271 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
272 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
274 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
275 0x1f, 0x20, 0x03, 0xd5, /* nop */
276 0x1f, 0x20, 0x03, 0xd5, /* nop */
279 #define elf_info_to_howto elfNN_aarch64_info_to_howto
280 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
282 #define AARCH64_ELF_ABI_VERSION 0
284 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
285 #define ALL_ONES (~ (bfd_vma) 0)
287 /* Indexed by the bfd interal reloc enumerators.
288 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
291 static reloc_howto_type elfNN_aarch64_howto_table[] =
295 /* Basic data relocations. */
298 HOWTO (R_AARCH64_NULL, /* type */
300 3, /* size (0 = byte, 1 = short, 2 = long) */
302 FALSE, /* pc_relative */
304 complain_overflow_dont, /* complain_on_overflow */
305 bfd_elf_generic_reloc, /* special_function */
306 "R_AARCH64_NULL", /* name */
307 FALSE, /* partial_inplace */
310 FALSE), /* pcrel_offset */
312 HOWTO (R_AARCH64_NONE, /* type */
314 3, /* size (0 = byte, 1 = short, 2 = long) */
316 FALSE, /* pc_relative */
318 complain_overflow_dont, /* complain_on_overflow */
319 bfd_elf_generic_reloc, /* special_function */
320 "R_AARCH64_NONE", /* name */
321 FALSE, /* partial_inplace */
324 FALSE), /* pcrel_offset */
328 HOWTO64 (AARCH64_R (ABS64), /* type */
330 4, /* size (4 = long long) */
332 FALSE, /* pc_relative */
334 complain_overflow_unsigned, /* complain_on_overflow */
335 bfd_elf_generic_reloc, /* special_function */
336 AARCH64_R_STR (ABS64), /* name */
337 FALSE, /* partial_inplace */
338 ALL_ONES, /* src_mask */
339 ALL_ONES, /* dst_mask */
340 FALSE), /* pcrel_offset */
343 HOWTO (AARCH64_R (ABS32), /* type */
345 2, /* size (0 = byte, 1 = short, 2 = long) */
347 FALSE, /* pc_relative */
349 complain_overflow_unsigned, /* complain_on_overflow */
350 bfd_elf_generic_reloc, /* special_function */
351 AARCH64_R_STR (ABS32), /* name */
352 FALSE, /* partial_inplace */
353 0xffffffff, /* src_mask */
354 0xffffffff, /* dst_mask */
355 FALSE), /* pcrel_offset */
358 HOWTO (AARCH64_R (ABS16), /* type */
360 1, /* size (0 = byte, 1 = short, 2 = long) */
362 FALSE, /* pc_relative */
364 complain_overflow_unsigned, /* complain_on_overflow */
365 bfd_elf_generic_reloc, /* special_function */
366 AARCH64_R_STR (ABS16), /* name */
367 FALSE, /* partial_inplace */
368 0xffff, /* src_mask */
369 0xffff, /* dst_mask */
370 FALSE), /* pcrel_offset */
372 /* .xword: (S+A-P) */
373 HOWTO64 (AARCH64_R (PREL64), /* type */
375 4, /* size (4 = long long) */
377 TRUE, /* pc_relative */
379 complain_overflow_signed, /* complain_on_overflow */
380 bfd_elf_generic_reloc, /* special_function */
381 AARCH64_R_STR (PREL64), /* name */
382 FALSE, /* partial_inplace */
383 ALL_ONES, /* src_mask */
384 ALL_ONES, /* dst_mask */
385 TRUE), /* pcrel_offset */
388 HOWTO (AARCH64_R (PREL32), /* type */
390 2, /* size (0 = byte, 1 = short, 2 = long) */
392 TRUE, /* pc_relative */
394 complain_overflow_signed, /* complain_on_overflow */
395 bfd_elf_generic_reloc, /* special_function */
396 AARCH64_R_STR (PREL32), /* name */
397 FALSE, /* partial_inplace */
398 0xffffffff, /* src_mask */
399 0xffffffff, /* dst_mask */
400 TRUE), /* pcrel_offset */
403 HOWTO (AARCH64_R (PREL16), /* type */
405 1, /* size (0 = byte, 1 = short, 2 = long) */
407 TRUE, /* pc_relative */
409 complain_overflow_signed, /* complain_on_overflow */
410 bfd_elf_generic_reloc, /* special_function */
411 AARCH64_R_STR (PREL16), /* name */
412 FALSE, /* partial_inplace */
413 0xffff, /* src_mask */
414 0xffff, /* dst_mask */
415 TRUE), /* pcrel_offset */
417 /* Group relocations to create a 16, 32, 48 or 64 bit
418 unsigned data or abs address inline. */
420 /* MOVZ: ((S+A) >> 0) & 0xffff */
421 HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
423 2, /* size (0 = byte, 1 = short, 2 = long) */
425 FALSE, /* pc_relative */
427 complain_overflow_unsigned, /* complain_on_overflow */
428 bfd_elf_generic_reloc, /* special_function */
429 AARCH64_R_STR (MOVW_UABS_G0), /* name */
430 FALSE, /* partial_inplace */
431 0xffff, /* src_mask */
432 0xffff, /* dst_mask */
433 FALSE), /* pcrel_offset */
435 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
436 HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
438 2, /* size (0 = byte, 1 = short, 2 = long) */
440 FALSE, /* pc_relative */
442 complain_overflow_dont, /* complain_on_overflow */
443 bfd_elf_generic_reloc, /* special_function */
444 AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */
445 FALSE, /* partial_inplace */
446 0xffff, /* src_mask */
447 0xffff, /* dst_mask */
448 FALSE), /* pcrel_offset */
450 /* MOVZ: ((S+A) >> 16) & 0xffff */
451 HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
453 2, /* size (0 = byte, 1 = short, 2 = long) */
455 FALSE, /* pc_relative */
457 complain_overflow_unsigned, /* complain_on_overflow */
458 bfd_elf_generic_reloc, /* special_function */
459 AARCH64_R_STR (MOVW_UABS_G1), /* name */
460 FALSE, /* partial_inplace */
461 0xffff, /* src_mask */
462 0xffff, /* dst_mask */
463 FALSE), /* pcrel_offset */
465 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
466 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
468 2, /* size (0 = byte, 1 = short, 2 = long) */
470 FALSE, /* pc_relative */
472 complain_overflow_dont, /* complain_on_overflow */
473 bfd_elf_generic_reloc, /* special_function */
474 AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */
475 FALSE, /* partial_inplace */
476 0xffff, /* src_mask */
477 0xffff, /* dst_mask */
478 FALSE), /* pcrel_offset */
480 /* MOVZ: ((S+A) >> 32) & 0xffff */
481 HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
483 2, /* size (0 = byte, 1 = short, 2 = long) */
485 FALSE, /* pc_relative */
487 complain_overflow_unsigned, /* complain_on_overflow */
488 bfd_elf_generic_reloc, /* special_function */
489 AARCH64_R_STR (MOVW_UABS_G2), /* name */
490 FALSE, /* partial_inplace */
491 0xffff, /* src_mask */
492 0xffff, /* dst_mask */
493 FALSE), /* pcrel_offset */
495 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
496 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
498 2, /* size (0 = byte, 1 = short, 2 = long) */
500 FALSE, /* pc_relative */
502 complain_overflow_dont, /* complain_on_overflow */
503 bfd_elf_generic_reloc, /* special_function */
504 AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */
505 FALSE, /* partial_inplace */
506 0xffff, /* src_mask */
507 0xffff, /* dst_mask */
508 FALSE), /* pcrel_offset */
510 /* MOVZ: ((S+A) >> 48) & 0xffff */
511 HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
513 2, /* size (0 = byte, 1 = short, 2 = long) */
515 FALSE, /* pc_relative */
517 complain_overflow_unsigned, /* complain_on_overflow */
518 bfd_elf_generic_reloc, /* special_function */
519 AARCH64_R_STR (MOVW_UABS_G3), /* name */
520 FALSE, /* partial_inplace */
521 0xffff, /* src_mask */
522 0xffff, /* dst_mask */
523 FALSE), /* pcrel_offset */
525 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
526 signed data or abs address inline. Will change instruction
527 to MOVN or MOVZ depending on sign of calculated value. */
529 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
530 HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
532 2, /* size (0 = byte, 1 = short, 2 = long) */
534 FALSE, /* pc_relative */
536 complain_overflow_signed, /* complain_on_overflow */
537 bfd_elf_generic_reloc, /* special_function */
538 AARCH64_R_STR (MOVW_SABS_G0), /* name */
539 FALSE, /* partial_inplace */
540 0xffff, /* src_mask */
541 0xffff, /* dst_mask */
542 FALSE), /* pcrel_offset */
544 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
545 HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
547 2, /* size (0 = byte, 1 = short, 2 = long) */
549 FALSE, /* pc_relative */
551 complain_overflow_signed, /* complain_on_overflow */
552 bfd_elf_generic_reloc, /* special_function */
553 AARCH64_R_STR (MOVW_SABS_G1), /* name */
554 FALSE, /* partial_inplace */
555 0xffff, /* src_mask */
556 0xffff, /* dst_mask */
557 FALSE), /* pcrel_offset */
559 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
560 HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
562 2, /* size (0 = byte, 1 = short, 2 = long) */
564 FALSE, /* pc_relative */
566 complain_overflow_signed, /* complain_on_overflow */
567 bfd_elf_generic_reloc, /* special_function */
568 AARCH64_R_STR (MOVW_SABS_G2), /* name */
569 FALSE, /* partial_inplace */
570 0xffff, /* src_mask */
571 0xffff, /* dst_mask */
572 FALSE), /* pcrel_offset */
574 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
575 addresses: PG(x) is (x & ~0xfff). */
577 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
578 HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
582 TRUE, /* pc_relative */
584 complain_overflow_signed, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 AARCH64_R_STR (LD_PREL_LO19), /* name */
587 FALSE, /* partial_inplace */
588 0x7ffff, /* src_mask */
589 0x7ffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
592 /* ADR: (S+A-P) & 0x1fffff */
593 HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
595 2, /* size (0 = byte, 1 = short, 2 = long) */
597 TRUE, /* pc_relative */
599 complain_overflow_signed, /* complain_on_overflow */
600 bfd_elf_generic_reloc, /* special_function */
601 AARCH64_R_STR (ADR_PREL_LO21), /* name */
602 FALSE, /* partial_inplace */
603 0x1fffff, /* src_mask */
604 0x1fffff, /* dst_mask */
605 TRUE), /* pcrel_offset */
607 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
608 HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
610 2, /* size (0 = byte, 1 = short, 2 = long) */
612 TRUE, /* pc_relative */
614 complain_overflow_signed, /* complain_on_overflow */
615 bfd_elf_generic_reloc, /* special_function */
616 AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */
617 FALSE, /* partial_inplace */
618 0x1fffff, /* src_mask */
619 0x1fffff, /* dst_mask */
620 TRUE), /* pcrel_offset */
622 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
623 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
625 2, /* size (0 = byte, 1 = short, 2 = long) */
627 TRUE, /* pc_relative */
629 complain_overflow_dont, /* complain_on_overflow */
630 bfd_elf_generic_reloc, /* special_function */
631 AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */
632 FALSE, /* partial_inplace */
633 0x1fffff, /* src_mask */
634 0x1fffff, /* dst_mask */
635 TRUE), /* pcrel_offset */
637 /* ADD: (S+A) & 0xfff [no overflow check] */
638 HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
640 2, /* size (0 = byte, 1 = short, 2 = long) */
642 FALSE, /* pc_relative */
644 complain_overflow_dont, /* complain_on_overflow */
645 bfd_elf_generic_reloc, /* special_function */
646 AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */
647 FALSE, /* partial_inplace */
648 0x3ffc00, /* src_mask */
649 0x3ffc00, /* dst_mask */
650 FALSE), /* pcrel_offset */
652 /* LD/ST8: (S+A) & 0xfff */
653 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
655 2, /* size (0 = byte, 1 = short, 2 = long) */
657 FALSE, /* pc_relative */
659 complain_overflow_dont, /* complain_on_overflow */
660 bfd_elf_generic_reloc, /* special_function */
661 AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */
662 FALSE, /* partial_inplace */
663 0xfff, /* src_mask */
664 0xfff, /* dst_mask */
665 FALSE), /* pcrel_offset */
667 /* Relocations for control-flow instructions. */
669 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
670 HOWTO (AARCH64_R (TSTBR14), /* type */
672 2, /* size (0 = byte, 1 = short, 2 = long) */
674 TRUE, /* pc_relative */
676 complain_overflow_signed, /* complain_on_overflow */
677 bfd_elf_generic_reloc, /* special_function */
678 AARCH64_R_STR (TSTBR14), /* name */
679 FALSE, /* partial_inplace */
680 0x3fff, /* src_mask */
681 0x3fff, /* dst_mask */
682 TRUE), /* pcrel_offset */
684 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
685 HOWTO (AARCH64_R (CONDBR19), /* type */
687 2, /* size (0 = byte, 1 = short, 2 = long) */
689 TRUE, /* pc_relative */
691 complain_overflow_signed, /* complain_on_overflow */
692 bfd_elf_generic_reloc, /* special_function */
693 AARCH64_R_STR (CONDBR19), /* name */
694 FALSE, /* partial_inplace */
695 0x7ffff, /* src_mask */
696 0x7ffff, /* dst_mask */
697 TRUE), /* pcrel_offset */
699 /* B: ((S+A-P) >> 2) & 0x3ffffff */
700 HOWTO (AARCH64_R (JUMP26), /* type */
702 2, /* size (0 = byte, 1 = short, 2 = long) */
704 TRUE, /* pc_relative */
706 complain_overflow_signed, /* complain_on_overflow */
707 bfd_elf_generic_reloc, /* special_function */
708 AARCH64_R_STR (JUMP26), /* name */
709 FALSE, /* partial_inplace */
710 0x3ffffff, /* src_mask */
711 0x3ffffff, /* dst_mask */
712 TRUE), /* pcrel_offset */
714 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
715 HOWTO (AARCH64_R (CALL26), /* type */
717 2, /* size (0 = byte, 1 = short, 2 = long) */
719 TRUE, /* pc_relative */
721 complain_overflow_signed, /* complain_on_overflow */
722 bfd_elf_generic_reloc, /* special_function */
723 AARCH64_R_STR (CALL26), /* name */
724 FALSE, /* partial_inplace */
725 0x3ffffff, /* src_mask */
726 0x3ffffff, /* dst_mask */
727 TRUE), /* pcrel_offset */
729 /* LD/ST16: (S+A) & 0xffe */
730 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
732 2, /* size (0 = byte, 1 = short, 2 = long) */
734 FALSE, /* pc_relative */
736 complain_overflow_dont, /* complain_on_overflow */
737 bfd_elf_generic_reloc, /* special_function */
738 AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */
739 FALSE, /* partial_inplace */
740 0xffe, /* src_mask */
741 0xffe, /* dst_mask */
742 FALSE), /* pcrel_offset */
744 /* LD/ST32: (S+A) & 0xffc */
745 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
747 2, /* size (0 = byte, 1 = short, 2 = long) */
749 FALSE, /* pc_relative */
751 complain_overflow_dont, /* complain_on_overflow */
752 bfd_elf_generic_reloc, /* special_function */
753 AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */
754 FALSE, /* partial_inplace */
755 0xffc, /* src_mask */
756 0xffc, /* dst_mask */
757 FALSE), /* pcrel_offset */
759 /* LD/ST64: (S+A) & 0xff8 */
760 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
762 2, /* size (0 = byte, 1 = short, 2 = long) */
764 FALSE, /* pc_relative */
766 complain_overflow_dont, /* complain_on_overflow */
767 bfd_elf_generic_reloc, /* special_function */
768 AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */
769 FALSE, /* partial_inplace */
770 0xff8, /* src_mask */
771 0xff8, /* dst_mask */
772 FALSE), /* pcrel_offset */
774 /* LD/ST128: (S+A) & 0xff0 */
775 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
777 2, /* size (0 = byte, 1 = short, 2 = long) */
779 FALSE, /* pc_relative */
781 complain_overflow_dont, /* complain_on_overflow */
782 bfd_elf_generic_reloc, /* special_function */
783 AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */
784 FALSE, /* partial_inplace */
785 0xff0, /* src_mask */
786 0xff0, /* dst_mask */
787 FALSE), /* pcrel_offset */
789 /* Set a load-literal immediate field to bits
790 0x1FFFFC of G(S)-P */
791 HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
793 2, /* size (0 = byte,1 = short,2 = long) */
795 TRUE, /* pc_relative */
797 complain_overflow_signed, /* complain_on_overflow */
798 bfd_elf_generic_reloc, /* special_function */
799 AARCH64_R_STR (GOT_LD_PREL19), /* name */
800 FALSE, /* partial_inplace */
801 0xffffe0, /* src_mask */
802 0xffffe0, /* dst_mask */
803 TRUE), /* pcrel_offset */
805 /* Get to the page for the GOT entry for the symbol
806 (G(S) - P) using an ADRP instruction. */
807 HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
811 TRUE, /* pc_relative */
813 complain_overflow_dont, /* complain_on_overflow */
814 bfd_elf_generic_reloc, /* special_function */
815 AARCH64_R_STR (ADR_GOT_PAGE), /* name */
816 FALSE, /* partial_inplace */
817 0x1fffff, /* src_mask */
818 0x1fffff, /* dst_mask */
819 TRUE), /* pcrel_offset */
821 /* LD64: GOT offset G(S) & 0xff8 */
822 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
824 2, /* size (0 = byte, 1 = short, 2 = long) */
826 FALSE, /* pc_relative */
828 complain_overflow_dont, /* complain_on_overflow */
829 bfd_elf_generic_reloc, /* special_function */
830 AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */
831 FALSE, /* partial_inplace */
832 0xff8, /* src_mask */
833 0xff8, /* dst_mask */
834 FALSE), /* pcrel_offset */
836 /* LD32: GOT offset G(S) & 0xffc */
837 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
839 2, /* size (0 = byte, 1 = short, 2 = long) */
841 FALSE, /* pc_relative */
843 complain_overflow_dont, /* complain_on_overflow */
844 bfd_elf_generic_reloc, /* special_function */
845 AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */
846 FALSE, /* partial_inplace */
847 0xffc, /* src_mask */
848 0xffc, /* dst_mask */
849 FALSE), /* pcrel_offset */
851 /* Get to the page for the GOT entry for the symbol
852 (G(S) - P) using an ADRP instruction. */
853 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */
855 2, /* size (0 = byte, 1 = short, 2 = long) */
857 TRUE, /* pc_relative */
859 complain_overflow_dont, /* complain_on_overflow */
860 bfd_elf_generic_reloc, /* special_function */
861 AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */
862 FALSE, /* partial_inplace */
863 0x1fffff, /* src_mask */
864 0x1fffff, /* dst_mask */
865 TRUE), /* pcrel_offset */
867 HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */
869 2, /* size (0 = byte, 1 = short, 2 = long) */
871 TRUE, /* pc_relative */
873 complain_overflow_dont, /* complain_on_overflow */
874 bfd_elf_generic_reloc, /* special_function */
875 AARCH64_R_STR (TLSGD_ADR_PREL21), /* name */
876 FALSE, /* partial_inplace */
877 0x1fffff, /* src_mask */
878 0x1fffff, /* dst_mask */
879 TRUE), /* pcrel_offset */
881 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
882 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
884 2, /* size (0 = byte, 1 = short, 2 = long) */
886 FALSE, /* pc_relative */
888 complain_overflow_dont, /* complain_on_overflow */
889 bfd_elf_generic_reloc, /* special_function */
890 AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */
891 FALSE, /* partial_inplace */
892 0xfff, /* src_mask */
893 0xfff, /* dst_mask */
894 FALSE), /* pcrel_offset */
896 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
898 2, /* size (0 = byte, 1 = short, 2 = long) */
900 FALSE, /* pc_relative */
902 complain_overflow_dont, /* complain_on_overflow */
903 bfd_elf_generic_reloc, /* special_function */
904 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */
905 FALSE, /* partial_inplace */
906 0xffff, /* src_mask */
907 0xffff, /* dst_mask */
908 FALSE), /* pcrel_offset */
910 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
912 2, /* size (0 = byte, 1 = short, 2 = long) */
914 FALSE, /* pc_relative */
916 complain_overflow_dont, /* complain_on_overflow */
917 bfd_elf_generic_reloc, /* special_function */
918 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */
919 FALSE, /* partial_inplace */
920 0xffff, /* src_mask */
921 0xffff, /* dst_mask */
922 FALSE), /* pcrel_offset */
924 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
926 2, /* size (0 = byte, 1 = short, 2 = long) */
928 FALSE, /* pc_relative */
930 complain_overflow_dont, /* complain_on_overflow */
931 bfd_elf_generic_reloc, /* special_function */
932 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */
933 FALSE, /* partial_inplace */
934 0x1fffff, /* src_mask */
935 0x1fffff, /* dst_mask */
936 FALSE), /* pcrel_offset */
938 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
940 2, /* size (0 = byte, 1 = short, 2 = long) */
942 FALSE, /* pc_relative */
944 complain_overflow_dont, /* complain_on_overflow */
945 bfd_elf_generic_reloc, /* special_function */
946 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */
947 FALSE, /* partial_inplace */
948 0xff8, /* src_mask */
949 0xff8, /* dst_mask */
950 FALSE), /* pcrel_offset */
952 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
954 2, /* size (0 = byte, 1 = short, 2 = long) */
956 FALSE, /* pc_relative */
958 complain_overflow_dont, /* complain_on_overflow */
959 bfd_elf_generic_reloc, /* special_function */
960 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */
961 FALSE, /* partial_inplace */
962 0xffc, /* src_mask */
963 0xffc, /* dst_mask */
964 FALSE), /* pcrel_offset */
966 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
968 2, /* size (0 = byte, 1 = short, 2 = long) */
970 FALSE, /* pc_relative */
972 complain_overflow_dont, /* complain_on_overflow */
973 bfd_elf_generic_reloc, /* special_function */
974 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */
975 FALSE, /* partial_inplace */
976 0x1ffffc, /* src_mask */
977 0x1ffffc, /* dst_mask */
978 FALSE), /* pcrel_offset */
980 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
982 2, /* size (0 = byte, 1 = short, 2 = long) */
984 FALSE, /* pc_relative */
986 complain_overflow_unsigned, /* complain_on_overflow */
987 bfd_elf_generic_reloc, /* special_function */
988 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */
989 FALSE, /* partial_inplace */
990 0xffff, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
994 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
996 2, /* size (0 = byte, 1 = short, 2 = long) */
998 FALSE, /* pc_relative */
1000 complain_overflow_dont, /* complain_on_overflow */
1001 bfd_elf_generic_reloc, /* special_function */
1002 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */
1003 FALSE, /* partial_inplace */
1004 0xffff, /* src_mask */
1005 0xffff, /* dst_mask */
1006 FALSE), /* pcrel_offset */
1008 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
1009 16, /* rightshift */
1010 2, /* size (0 = byte, 1 = short, 2 = long) */
1012 FALSE, /* pc_relative */
1014 complain_overflow_dont, /* complain_on_overflow */
1015 bfd_elf_generic_reloc, /* special_function */
1016 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */
1017 FALSE, /* partial_inplace */
1018 0xffff, /* src_mask */
1019 0xffff, /* dst_mask */
1020 FALSE), /* pcrel_offset */
1022 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
1024 2, /* size (0 = byte, 1 = short, 2 = long) */
1026 FALSE, /* pc_relative */
1028 complain_overflow_dont, /* complain_on_overflow */
1029 bfd_elf_generic_reloc, /* special_function */
1030 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */
1031 FALSE, /* partial_inplace */
1032 0xffff, /* src_mask */
1033 0xffff, /* dst_mask */
1034 FALSE), /* pcrel_offset */
1036 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
1038 2, /* size (0 = byte, 1 = short, 2 = long) */
1040 FALSE, /* pc_relative */
1042 complain_overflow_dont, /* complain_on_overflow */
1043 bfd_elf_generic_reloc, /* special_function */
1044 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */
1045 FALSE, /* partial_inplace */
1046 0xffff, /* src_mask */
1047 0xffff, /* dst_mask */
1048 FALSE), /* pcrel_offset */
1050 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
1051 12, /* rightshift */
1052 2, /* size (0 = byte, 1 = short, 2 = long) */
1054 FALSE, /* pc_relative */
1056 complain_overflow_unsigned, /* complain_on_overflow */
1057 bfd_elf_generic_reloc, /* special_function */
1058 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */
1059 FALSE, /* partial_inplace */
1060 0xfff, /* src_mask */
1061 0xfff, /* dst_mask */
1062 FALSE), /* pcrel_offset */
1064 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
1066 2, /* size (0 = byte, 1 = short, 2 = long) */
1068 FALSE, /* pc_relative */
1070 complain_overflow_dont, /* complain_on_overflow */
1071 bfd_elf_generic_reloc, /* special_function */
1072 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */
1073 FALSE, /* partial_inplace */
1074 0xfff, /* src_mask */
1075 0xfff, /* dst_mask */
1076 FALSE), /* pcrel_offset */
1078 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
1080 2, /* size (0 = byte, 1 = short, 2 = long) */
1082 FALSE, /* pc_relative */
1084 complain_overflow_dont, /* complain_on_overflow */
1085 bfd_elf_generic_reloc, /* special_function */
1086 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */
1087 FALSE, /* partial_inplace */
1088 0xfff, /* src_mask */
1089 0xfff, /* dst_mask */
1090 FALSE), /* pcrel_offset */
1092 HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
1094 2, /* size (0 = byte, 1 = short, 2 = long) */
1096 TRUE, /* pc_relative */
1098 complain_overflow_dont, /* complain_on_overflow */
1099 bfd_elf_generic_reloc, /* special_function */
1100 AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */
1101 FALSE, /* partial_inplace */
1102 0x0ffffe0, /* src_mask */
1103 0x0ffffe0, /* dst_mask */
1104 TRUE), /* pcrel_offset */
1106 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
1108 2, /* size (0 = byte, 1 = short, 2 = long) */
1110 TRUE, /* pc_relative */
1112 complain_overflow_dont, /* complain_on_overflow */
1113 bfd_elf_generic_reloc, /* special_function */
1114 AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */
1115 FALSE, /* partial_inplace */
1116 0x1fffff, /* src_mask */
1117 0x1fffff, /* dst_mask */
1118 TRUE), /* pcrel_offset */
1120 /* Get to the page for the GOT entry for the symbol
1121 (G(S) - P) using an ADRP instruction. */
1122 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */
1123 12, /* rightshift */
1124 2, /* size (0 = byte, 1 = short, 2 = long) */
1126 TRUE, /* pc_relative */
1128 complain_overflow_dont, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */
1131 FALSE, /* partial_inplace */
1132 0x1fffff, /* src_mask */
1133 0x1fffff, /* dst_mask */
1134 TRUE), /* pcrel_offset */
1136 /* LD64: GOT offset G(S) & 0xff8. */
1137 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */
1139 2, /* size (0 = byte, 1 = short, 2 = long) */
1141 FALSE, /* pc_relative */
1143 complain_overflow_dont, /* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */
1146 FALSE, /* partial_inplace */
1147 0xff8, /* src_mask */
1148 0xff8, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1151 /* LD32: GOT offset G(S) & 0xffc. */
1152 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
1154 2, /* size (0 = byte, 1 = short, 2 = long) */
1156 FALSE, /* pc_relative */
1158 complain_overflow_dont, /* complain_on_overflow */
1159 bfd_elf_generic_reloc, /* special_function */
1160 AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */
1161 FALSE, /* partial_inplace */
1162 0xffc, /* src_mask */
1163 0xffc, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1166 /* ADD: GOT offset G(S) & 0xfff. */
1167 HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */
1169 2, /* size (0 = byte, 1 = short, 2 = long) */
1171 FALSE, /* pc_relative */
1173 complain_overflow_dont, /* complain_on_overflow */
1174 bfd_elf_generic_reloc, /* special_function */
1175 AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */
1176 FALSE, /* partial_inplace */
1177 0xfff, /* src_mask */
1178 0xfff, /* dst_mask */
1179 FALSE), /* pcrel_offset */
1181 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
1182 16, /* rightshift */
1183 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 FALSE, /* pc_relative */
1187 complain_overflow_dont, /* complain_on_overflow */
1188 bfd_elf_generic_reloc, /* special_function */
1189 AARCH64_R_STR (TLSDESC_OFF_G1), /* name */
1190 FALSE, /* partial_inplace */
1191 0xffff, /* src_mask */
1192 0xffff, /* dst_mask */
1193 FALSE), /* pcrel_offset */
1195 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
1197 2, /* size (0 = byte, 1 = short, 2 = long) */
1199 FALSE, /* pc_relative */
1201 complain_overflow_dont, /* complain_on_overflow */
1202 bfd_elf_generic_reloc, /* special_function */
1203 AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */
1204 FALSE, /* partial_inplace */
1205 0xffff, /* src_mask */
1206 0xffff, /* dst_mask */
1207 FALSE), /* pcrel_offset */
1209 HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
1211 2, /* size (0 = byte, 1 = short, 2 = long) */
1213 FALSE, /* pc_relative */
1215 complain_overflow_dont, /* complain_on_overflow */
1216 bfd_elf_generic_reloc, /* special_function */
1217 AARCH64_R_STR (TLSDESC_LDR), /* name */
1218 FALSE, /* partial_inplace */
1221 FALSE), /* pcrel_offset */
1223 HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
1225 2, /* size (0 = byte, 1 = short, 2 = long) */
1227 FALSE, /* pc_relative */
1229 complain_overflow_dont, /* complain_on_overflow */
1230 bfd_elf_generic_reloc, /* special_function */
1231 AARCH64_R_STR (TLSDESC_ADD), /* name */
1232 FALSE, /* partial_inplace */
1235 FALSE), /* pcrel_offset */
1237 HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
1239 2, /* size (0 = byte, 1 = short, 2 = long) */
1241 FALSE, /* pc_relative */
1243 complain_overflow_dont, /* complain_on_overflow */
1244 bfd_elf_generic_reloc, /* special_function */
1245 AARCH64_R_STR (TLSDESC_CALL), /* name */
1246 FALSE, /* partial_inplace */
1249 FALSE), /* pcrel_offset */
1251 HOWTO (AARCH64_R (COPY), /* type */
1253 2, /* size (0 = byte, 1 = short, 2 = long) */
1255 FALSE, /* pc_relative */
1257 complain_overflow_bitfield, /* complain_on_overflow */
1258 bfd_elf_generic_reloc, /* special_function */
1259 AARCH64_R_STR (COPY), /* name */
1260 TRUE, /* partial_inplace */
1261 0xffffffff, /* src_mask */
1262 0xffffffff, /* dst_mask */
1263 FALSE), /* pcrel_offset */
1265 HOWTO (AARCH64_R (GLOB_DAT), /* type */
1267 2, /* size (0 = byte, 1 = short, 2 = long) */
1269 FALSE, /* pc_relative */
1271 complain_overflow_bitfield, /* complain_on_overflow */
1272 bfd_elf_generic_reloc, /* special_function */
1273 AARCH64_R_STR (GLOB_DAT), /* name */
1274 TRUE, /* partial_inplace */
1275 0xffffffff, /* src_mask */
1276 0xffffffff, /* dst_mask */
1277 FALSE), /* pcrel_offset */
1279 HOWTO (AARCH64_R (JUMP_SLOT), /* type */
1281 2, /* size (0 = byte, 1 = short, 2 = long) */
1283 FALSE, /* pc_relative */
1285 complain_overflow_bitfield, /* complain_on_overflow */
1286 bfd_elf_generic_reloc, /* special_function */
1287 AARCH64_R_STR (JUMP_SLOT), /* name */
1288 TRUE, /* partial_inplace */
1289 0xffffffff, /* src_mask */
1290 0xffffffff, /* dst_mask */
1291 FALSE), /* pcrel_offset */
1293 HOWTO (AARCH64_R (RELATIVE), /* type */
1295 2, /* size (0 = byte, 1 = short, 2 = long) */
1297 FALSE, /* pc_relative */
1299 complain_overflow_bitfield, /* complain_on_overflow */
1300 bfd_elf_generic_reloc, /* special_function */
1301 AARCH64_R_STR (RELATIVE), /* name */
1302 TRUE, /* partial_inplace */
1303 ALL_ONES, /* src_mask */
1304 ALL_ONES, /* dst_mask */
1305 FALSE), /* pcrel_offset */
1307 HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
1309 2, /* size (0 = byte, 1 = short, 2 = long) */
1311 FALSE, /* pc_relative */
1313 complain_overflow_dont, /* complain_on_overflow */
1314 bfd_elf_generic_reloc, /* special_function */
1316 AARCH64_R_STR (TLS_DTPMOD64), /* name */
1318 AARCH64_R_STR (TLS_DTPMOD), /* name */
1320 FALSE, /* partial_inplace */
1322 ALL_ONES, /* dst_mask */
1323 FALSE), /* pc_reloffset */
1325 HOWTO (AARCH64_R (TLS_DTPREL), /* type */
1327 2, /* size (0 = byte, 1 = short, 2 = long) */
1329 FALSE, /* pc_relative */
1331 complain_overflow_dont, /* complain_on_overflow */
1332 bfd_elf_generic_reloc, /* special_function */
1334 AARCH64_R_STR (TLS_DTPREL64), /* name */
1336 AARCH64_R_STR (TLS_DTPREL), /* name */
1338 FALSE, /* partial_inplace */
1340 ALL_ONES, /* dst_mask */
1341 FALSE), /* pcrel_offset */
1343 HOWTO (AARCH64_R (TLS_TPREL), /* type */
1345 2, /* size (0 = byte, 1 = short, 2 = long) */
1347 FALSE, /* pc_relative */
1349 complain_overflow_dont, /* complain_on_overflow */
1350 bfd_elf_generic_reloc, /* special_function */
1352 AARCH64_R_STR (TLS_TPREL64), /* name */
1354 AARCH64_R_STR (TLS_TPREL), /* name */
1356 FALSE, /* partial_inplace */
1358 ALL_ONES, /* dst_mask */
1359 FALSE), /* pcrel_offset */
1361 HOWTO (AARCH64_R (TLSDESC), /* type */
1363 2, /* size (0 = byte, 1 = short, 2 = long) */
1365 FALSE, /* pc_relative */
1367 complain_overflow_dont, /* complain_on_overflow */
1368 bfd_elf_generic_reloc, /* special_function */
1369 AARCH64_R_STR (TLSDESC), /* name */
1370 FALSE, /* partial_inplace */
1372 ALL_ONES, /* dst_mask */
1373 FALSE), /* pcrel_offset */
1375 HOWTO (AARCH64_R (IRELATIVE), /* type */
1377 2, /* size (0 = byte, 1 = short, 2 = long) */
1379 FALSE, /* pc_relative */
1381 complain_overflow_bitfield, /* complain_on_overflow */
1382 bfd_elf_generic_reloc, /* special_function */
1383 AARCH64_R_STR (IRELATIVE), /* name */
1384 FALSE, /* partial_inplace */
1386 ALL_ONES, /* dst_mask */
1387 FALSE), /* pcrel_offset */
1392 static reloc_howto_type elfNN_aarch64_howto_none =
1393 HOWTO (R_AARCH64_NONE, /* type */
1395 3, /* size (0 = byte, 1 = short, 2 = long) */
1397 FALSE, /* pc_relative */
1399 complain_overflow_dont,/* complain_on_overflow */
1400 bfd_elf_generic_reloc, /* special_function */
1401 "R_AARCH64_NONE", /* name */
1402 FALSE, /* partial_inplace */
1405 FALSE); /* pcrel_offset */
1407 /* Given HOWTO, return the bfd internal relocation enumerator. */
1409 static bfd_reloc_code_real_type
1410 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
1413 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
1414 const ptrdiff_t offset
1415 = howto - elfNN_aarch64_howto_table;
1417 if (offset > 0 && offset < size - 1)
1418 return BFD_RELOC_AARCH64_RELOC_START + offset;
1420 if (howto == &elfNN_aarch64_howto_none)
1421 return BFD_RELOC_AARCH64_NONE;
1423 return BFD_RELOC_AARCH64_RELOC_START;
1426 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1428 static bfd_reloc_code_real_type
1429 elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type)
1431 static bfd_boolean initialized_p = FALSE;
1432 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1433 static unsigned int offsets[R_AARCH64_end];
1435 if (initialized_p == FALSE)
1439 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1440 if (elfNN_aarch64_howto_table[i].type != 0)
1441 offsets[elfNN_aarch64_howto_table[i].type] = i;
1443 initialized_p = TRUE;
1446 if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
1447 return BFD_RELOC_AARCH64_NONE;
1449 /* PR 17512: file: b371e70a. */
1450 if (r_type >= R_AARCH64_end)
1452 _bfd_error_handler (_("Invalid AArch64 reloc number: %d"), r_type);
1453 bfd_set_error (bfd_error_bad_value);
1454 return BFD_RELOC_AARCH64_NONE;
1457 return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
1460 struct elf_aarch64_reloc_map
1462 bfd_reloc_code_real_type from;
1463 bfd_reloc_code_real_type to;
1466 /* Map bfd generic reloc to AArch64-specific reloc. */
1467 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
1469 {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
1471 /* Basic data relocations. */
1472 {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN},
1473 {BFD_RELOC_64, BFD_RELOC_AARCH64_64},
1474 {BFD_RELOC_32, BFD_RELOC_AARCH64_32},
1475 {BFD_RELOC_16, BFD_RELOC_AARCH64_16},
1476 {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL},
1477 {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL},
1478 {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL},
1481 /* Given the bfd internal relocation enumerator in CODE, return the
1482 corresponding howto entry. */
1484 static reloc_howto_type *
1485 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
1489 /* Convert bfd generic reloc to AArch64-specific reloc. */
1490 if (code < BFD_RELOC_AARCH64_RELOC_START
1491 || code > BFD_RELOC_AARCH64_RELOC_END)
1492 for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++)
1493 if (elf_aarch64_reloc_map[i].from == code)
1495 code = elf_aarch64_reloc_map[i].to;
1499 if (code > BFD_RELOC_AARCH64_RELOC_START
1500 && code < BFD_RELOC_AARCH64_RELOC_END)
1501 if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type)
1502 return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START];
1504 if (code == BFD_RELOC_AARCH64_NONE)
1505 return &elfNN_aarch64_howto_none;
1510 static reloc_howto_type *
1511 elfNN_aarch64_howto_from_type (unsigned int r_type)
1513 bfd_reloc_code_real_type val;
1514 reloc_howto_type *howto;
1519 bfd_set_error (bfd_error_bad_value);
1524 if (r_type == R_AARCH64_NONE)
1525 return &elfNN_aarch64_howto_none;
1527 val = elfNN_aarch64_bfd_reloc_from_type (r_type);
1528 howto = elfNN_aarch64_howto_from_bfd_reloc (val);
1533 bfd_set_error (bfd_error_bad_value);
1538 elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
1539 Elf_Internal_Rela *elf_reloc)
1541 unsigned int r_type;
1543 r_type = ELFNN_R_TYPE (elf_reloc->r_info);
1544 bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type);
1547 static reloc_howto_type *
1548 elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1549 bfd_reloc_code_real_type code)
1551 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
1556 bfd_set_error (bfd_error_bad_value);
1560 static reloc_howto_type *
1561 elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1566 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1567 if (elfNN_aarch64_howto_table[i].name != NULL
1568 && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0)
1569 return &elfNN_aarch64_howto_table[i];
1574 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
1575 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
1576 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
1577 #define TARGET_BIG_NAME "elfNN-bigaarch64"
1579 /* The linker script knows the section names for placement.
1580 The entry_names are used to do simple name mangling on the stubs.
1581 Given a function name, and its type, the stub can be found. The
1582 name can be changed. The only requirement is the %s be present. */
1583 #define STUB_ENTRY_NAME "__%s_veneer"
1585 /* The name of the dynamic interpreter. This is put in the .interp
1587 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1589 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
1590 (((1 << 25) - 1) << 2)
1591 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
1594 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
1595 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
1598 aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
1600 bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12;
1601 return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM;
1605 aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
1607 bfd_signed_vma offset = (bfd_signed_vma) (value - place);
1608 return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET
1609 && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET);
1612 static const uint32_t aarch64_adrp_branch_stub [] =
1614 0x90000010, /* adrp ip0, X */
1615 /* R_AARCH64_ADR_HI21_PCREL(X) */
1616 0x91000210, /* add ip0, ip0, :lo12:X */
1617 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
1618 0xd61f0200, /* br ip0 */
1621 static const uint32_t aarch64_long_branch_stub[] =
1624 0x58000090, /* ldr ip0, 1f */
1626 0x18000090, /* ldr wip0, 1f */
1628 0x10000011, /* adr ip1, #0 */
1629 0x8b110210, /* add ip0, ip0, ip1 */
1630 0xd61f0200, /* br ip0 */
1631 0x00000000, /* 1: .xword or .word
1632 R_AARCH64_PRELNN(X) + 12
1637 static const uint32_t aarch64_erratum_835769_stub[] =
1639 0x00000000, /* Placeholder for multiply accumulate. */
1640 0x14000000, /* b <label> */
1643 /* Section name for stubs is the associated section name plus this
1645 #define STUB_SUFFIX ".stub"
1647 enum elf_aarch64_stub_type
1650 aarch64_stub_adrp_branch,
1651 aarch64_stub_long_branch,
1652 aarch64_stub_erratum_835769_veneer,
1655 struct elf_aarch64_stub_hash_entry
1657 /* Base hash table entry structure. */
1658 struct bfd_hash_entry root;
1660 /* The stub section. */
1663 /* Offset within stub_sec of the beginning of this stub. */
1664 bfd_vma stub_offset;
1666 /* Given the symbol's value and its section we can determine its final
1667 value when building the stubs (so the stub knows where to jump). */
1668 bfd_vma target_value;
1669 asection *target_section;
1671 enum elf_aarch64_stub_type stub_type;
1673 /* The symbol table entry, if any, that this was derived from. */
1674 struct elf_aarch64_link_hash_entry *h;
1676 /* Destination symbol type */
1677 unsigned char st_type;
1679 /* Where this stub is being called from, or, in the case of combined
1680 stub sections, the first input section in the group. */
1683 /* The name for the local symbol at the start of this stub. The
1684 stub name in the hash table has to be unique; this does not, so
1685 it can be friendlier. */
1688 /* The instruction which caused this stub to be generated (only valid for
1689 erratum 835769 workaround stubs at present). */
1690 uint32_t veneered_insn;
1693 /* Used to build a map of a section. This is required for mixed-endian
1696 typedef struct elf_elf_section_map
1701 elf_aarch64_section_map;
1704 typedef struct _aarch64_elf_section_data
1706 struct bfd_elf_section_data elf;
1707 unsigned int mapcount;
1708 unsigned int mapsize;
1709 elf_aarch64_section_map *map;
1711 _aarch64_elf_section_data;
1713 #define elf_aarch64_section_data(sec) \
1714 ((_aarch64_elf_section_data *) elf_section_data (sec))
1716 /* A fix-descriptor for erratum 835769. */
1717 struct aarch64_erratum_835769_fix
1722 uint32_t veneered_insn;
1724 enum elf_aarch64_stub_type stub_type;
1727 /* The size of the thread control block which is defined to be two pointers. */
1728 #define TCB_SIZE (ARCH_SIZE/8)*2
1730 struct elf_aarch64_local_symbol
1732 unsigned int got_type;
1733 bfd_signed_vma got_refcount;
1736 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
1737 offset is from the end of the jump table and reserved entries
1740 The magic value (bfd_vma) -1 indicates that an offset has not be
1742 bfd_vma tlsdesc_got_jump_table_offset;
1745 struct elf_aarch64_obj_tdata
1747 struct elf_obj_tdata root;
1749 /* local symbol descriptors */
1750 struct elf_aarch64_local_symbol *locals;
1752 /* Zero to warn when linking objects with incompatible enum sizes. */
1753 int no_enum_size_warning;
1755 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
1756 int no_wchar_size_warning;
1759 #define elf_aarch64_tdata(bfd) \
1760 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
1762 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
1764 #define is_aarch64_elf(bfd) \
1765 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1766 && elf_tdata (bfd) != NULL \
1767 && elf_object_id (bfd) == AARCH64_ELF_DATA)
1770 elfNN_aarch64_mkobject (bfd *abfd)
1772 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
1776 #define elf_aarch64_hash_entry(ent) \
1777 ((struct elf_aarch64_link_hash_entry *)(ent))
1779 #define GOT_UNKNOWN 0
1780 #define GOT_NORMAL 1
1781 #define GOT_TLS_GD 2
1782 #define GOT_TLS_IE 4
1783 #define GOT_TLSDESC_GD 8
1785 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
1787 /* AArch64 ELF linker hash entry. */
1788 struct elf_aarch64_link_hash_entry
1790 struct elf_link_hash_entry root;
1792 /* Track dynamic relocs copied for this symbol. */
1793 struct elf_dyn_relocs *dyn_relocs;
1795 /* Since PLT entries have variable size, we need to record the
1796 index into .got.plt instead of recomputing it from the PLT
1798 bfd_signed_vma plt_got_offset;
1800 /* Bit mask representing the type of GOT entry(s) if any required by
1802 unsigned int got_type;
1804 /* A pointer to the most recently used stub hash entry against this
1806 struct elf_aarch64_stub_hash_entry *stub_cache;
1808 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
1809 is from the end of the jump table and reserved entries within the PLTGOT.
1811 The magic value (bfd_vma) -1 indicates that an offset has not
1813 bfd_vma tlsdesc_got_jump_table_offset;
1817 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
1819 unsigned long r_symndx)
1822 return elf_aarch64_hash_entry (h)->got_type;
1824 if (! elf_aarch64_locals (abfd))
1827 return elf_aarch64_locals (abfd)[r_symndx].got_type;
1830 /* Get the AArch64 elf linker hash table from a link_info structure. */
1831 #define elf_aarch64_hash_table(info) \
1832 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
1834 #define aarch64_stub_hash_lookup(table, string, create, copy) \
1835 ((struct elf_aarch64_stub_hash_entry *) \
1836 bfd_hash_lookup ((table), (string), (create), (copy)))
1838 /* AArch64 ELF linker hash table. */
1839 struct elf_aarch64_link_hash_table
1841 /* The main hash table. */
1842 struct elf_link_hash_table root;
1844 /* Nonzero to force PIC branch veneers. */
1847 /* Fix erratum 835769. */
1848 int fix_erratum_835769;
1850 /* The number of bytes in the initial entry in the PLT. */
1851 bfd_size_type plt_header_size;
1853 /* The number of bytes in the subsequent PLT etries. */
1854 bfd_size_type plt_entry_size;
1856 /* Short-cuts to get to dynamic linker sections. */
1860 /* Small local sym cache. */
1861 struct sym_cache sym_cache;
1863 /* For convenience in allocate_dynrelocs. */
1866 /* The amount of space used by the reserved portion of the sgotplt
1867 section, plus whatever space is used by the jump slots. */
1868 bfd_vma sgotplt_jump_table_size;
1870 /* The stub hash table. */
1871 struct bfd_hash_table stub_hash_table;
1873 /* Linker stub bfd. */
1876 /* Linker call-backs. */
1877 asection *(*add_stub_section) (const char *, asection *);
1878 void (*layout_sections_again) (void);
1880 /* Array to keep track of which stub sections have been created, and
1881 information on stub grouping. */
1884 /* This is the section to which stubs in the group will be
1887 /* The stub section. */
1891 /* Assorted information used by elfNN_aarch64_size_stubs. */
1892 unsigned int bfd_count;
1894 asection **input_list;
1896 /* The offset into splt of the PLT entry for the TLS descriptor
1897 resolver. Special values are 0, if not necessary (or not found
1898 to be necessary yet), and -1 if needed but not determined
1900 bfd_vma tlsdesc_plt;
1902 /* The GOT offset for the lazy trampoline. Communicated to the
1903 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
1904 indicates an offset is not allocated. */
1905 bfd_vma dt_tlsdesc_got;
1907 /* Used by local STT_GNU_IFUNC symbols. */
1908 htab_t loc_hash_table;
1909 void * loc_hash_memory;
1912 /* Create an entry in an AArch64 ELF linker hash table. */
1914 static struct bfd_hash_entry *
1915 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
1916 struct bfd_hash_table *table,
1919 struct elf_aarch64_link_hash_entry *ret =
1920 (struct elf_aarch64_link_hash_entry *) entry;
1922 /* Allocate the structure if it has not already been allocated by a
1925 ret = bfd_hash_allocate (table,
1926 sizeof (struct elf_aarch64_link_hash_entry));
1928 return (struct bfd_hash_entry *) ret;
1930 /* Call the allocation method of the superclass. */
1931 ret = ((struct elf_aarch64_link_hash_entry *)
1932 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1936 ret->dyn_relocs = NULL;
1937 ret->got_type = GOT_UNKNOWN;
1938 ret->plt_got_offset = (bfd_vma) - 1;
1939 ret->stub_cache = NULL;
1940 ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
1943 return (struct bfd_hash_entry *) ret;
1946 /* Initialize an entry in the stub hash table. */
1948 static struct bfd_hash_entry *
1949 stub_hash_newfunc (struct bfd_hash_entry *entry,
1950 struct bfd_hash_table *table, const char *string)
1952 /* Allocate the structure if it has not already been allocated by a
1956 entry = bfd_hash_allocate (table,
1958 elf_aarch64_stub_hash_entry));
1963 /* Call the allocation method of the superclass. */
1964 entry = bfd_hash_newfunc (entry, table, string);
1967 struct elf_aarch64_stub_hash_entry *eh;
1969 /* Initialize the local fields. */
1970 eh = (struct elf_aarch64_stub_hash_entry *) entry;
1971 eh->stub_sec = NULL;
1972 eh->stub_offset = 0;
1973 eh->target_value = 0;
1974 eh->target_section = NULL;
1975 eh->stub_type = aarch64_stub_none;
1983 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1984 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1985 as global symbol. We reuse indx and dynstr_index for local symbol
1986 hash since they aren't used by global symbols in this backend. */
1989 elfNN_aarch64_local_htab_hash (const void *ptr)
1991 struct elf_link_hash_entry *h
1992 = (struct elf_link_hash_entry *) ptr;
1993 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1996 /* Compare local hash entries. */
1999 elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
2001 struct elf_link_hash_entry *h1
2002 = (struct elf_link_hash_entry *) ptr1;
2003 struct elf_link_hash_entry *h2
2004 = (struct elf_link_hash_entry *) ptr2;
2006 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
2009 /* Find and/or create a hash entry for local symbol. */
2011 static struct elf_link_hash_entry *
2012 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab,
2013 bfd *abfd, const Elf_Internal_Rela *rel,
2016 struct elf_aarch64_link_hash_entry e, *ret;
2017 asection *sec = abfd->sections;
2018 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
2019 ELFNN_R_SYM (rel->r_info));
2022 e.root.indx = sec->id;
2023 e.root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2024 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
2025 create ? INSERT : NO_INSERT);
2032 ret = (struct elf_aarch64_link_hash_entry *) *slot;
2036 ret = (struct elf_aarch64_link_hash_entry *)
2037 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
2038 sizeof (struct elf_aarch64_link_hash_entry));
2041 memset (ret, 0, sizeof (*ret));
2042 ret->root.indx = sec->id;
2043 ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2044 ret->root.dynindx = -1;
2050 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2053 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
2054 struct elf_link_hash_entry *dir,
2055 struct elf_link_hash_entry *ind)
2057 struct elf_aarch64_link_hash_entry *edir, *eind;
2059 edir = (struct elf_aarch64_link_hash_entry *) dir;
2060 eind = (struct elf_aarch64_link_hash_entry *) ind;
2062 if (eind->dyn_relocs != NULL)
2064 if (edir->dyn_relocs != NULL)
2066 struct elf_dyn_relocs **pp;
2067 struct elf_dyn_relocs *p;
2069 /* Add reloc counts against the indirect sym to the direct sym
2070 list. Merge any entries against the same section. */
2071 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2073 struct elf_dyn_relocs *q;
2075 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2076 if (q->sec == p->sec)
2078 q->pc_count += p->pc_count;
2079 q->count += p->count;
2086 *pp = edir->dyn_relocs;
2089 edir->dyn_relocs = eind->dyn_relocs;
2090 eind->dyn_relocs = NULL;
2093 if (ind->root.type == bfd_link_hash_indirect)
2095 /* Copy over PLT info. */
2096 if (dir->got.refcount <= 0)
2098 edir->got_type = eind->got_type;
2099 eind->got_type = GOT_UNKNOWN;
2103 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2106 /* Destroy an AArch64 elf linker hash table. */
2109 elfNN_aarch64_link_hash_table_free (bfd *obfd)
2111 struct elf_aarch64_link_hash_table *ret
2112 = (struct elf_aarch64_link_hash_table *) obfd->link.hash;
2114 if (ret->loc_hash_table)
2115 htab_delete (ret->loc_hash_table);
2116 if (ret->loc_hash_memory)
2117 objalloc_free ((struct objalloc *) ret->loc_hash_memory);
2119 bfd_hash_table_free (&ret->stub_hash_table);
2120 _bfd_elf_link_hash_table_free (obfd);
2123 /* Create an AArch64 elf linker hash table. */
2125 static struct bfd_link_hash_table *
2126 elfNN_aarch64_link_hash_table_create (bfd *abfd)
2128 struct elf_aarch64_link_hash_table *ret;
2129 bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
2131 ret = bfd_zmalloc (amt);
2135 if (!_bfd_elf_link_hash_table_init
2136 (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
2137 sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
2143 ret->plt_header_size = PLT_ENTRY_SIZE;
2144 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
2146 ret->dt_tlsdesc_got = (bfd_vma) - 1;
2148 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2149 sizeof (struct elf_aarch64_stub_hash_entry)))
2151 _bfd_elf_link_hash_table_free (abfd);
2155 ret->loc_hash_table = htab_try_create (1024,
2156 elfNN_aarch64_local_htab_hash,
2157 elfNN_aarch64_local_htab_eq,
2159 ret->loc_hash_memory = objalloc_create ();
2160 if (!ret->loc_hash_table || !ret->loc_hash_memory)
2162 elfNN_aarch64_link_hash_table_free (abfd);
2165 ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free;
2167 return &ret->root.root;
2171 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2172 bfd_vma offset, bfd_vma value)
2174 reloc_howto_type *howto;
2177 howto = elfNN_aarch64_howto_from_type (r_type);
2178 place = (input_section->output_section->vma + input_section->output_offset
2181 r_type = elfNN_aarch64_bfd_reloc_from_type (r_type);
2182 value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE);
2183 return _bfd_aarch64_elf_put_addend (input_bfd,
2184 input_section->contents + offset, r_type,
2188 static enum elf_aarch64_stub_type
2189 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2191 if (aarch64_valid_for_adrp_p (value, place))
2192 return aarch64_stub_adrp_branch;
2193 return aarch64_stub_long_branch;
2196 /* Determine the type of stub needed, if any, for a call. */
2198 static enum elf_aarch64_stub_type
2199 aarch64_type_of_stub (struct bfd_link_info *info,
2200 asection *input_sec,
2201 const Elf_Internal_Rela *rel,
2202 unsigned char st_type,
2203 struct elf_aarch64_link_hash_entry *hash,
2204 bfd_vma destination)
2207 bfd_signed_vma branch_offset;
2208 unsigned int r_type;
2209 struct elf_aarch64_link_hash_table *globals;
2210 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2211 bfd_boolean via_plt_p;
2213 if (st_type != STT_FUNC)
2216 globals = elf_aarch64_hash_table (info);
2217 via_plt_p = (globals->root.splt != NULL && hash != NULL
2218 && hash->root.plt.offset != (bfd_vma) - 1);
2223 /* Determine where the call point is. */
2224 location = (input_sec->output_offset
2225 + input_sec->output_section->vma + rel->r_offset);
2227 branch_offset = (bfd_signed_vma) (destination - location);
2229 r_type = ELFNN_R_TYPE (rel->r_info);
2231 /* We don't want to redirect any old unconditional jump in this way,
2232 only one which is being used for a sibcall, where it is
2233 acceptable for the IP0 and IP1 registers to be clobbered. */
2234 if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
2235 && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
2236 || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
2238 stub_type = aarch64_stub_long_branch;
2244 /* Build a name for an entry in the stub hash table. */
2247 elfNN_aarch64_stub_name (const asection *input_section,
2248 const asection *sym_sec,
2249 const struct elf_aarch64_link_hash_entry *hash,
2250 const Elf_Internal_Rela *rel)
2257 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
2258 stub_name = bfd_malloc (len);
2259 if (stub_name != NULL)
2260 snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
2261 (unsigned int) input_section->id,
2262 hash->root.root.root.string,
2267 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2268 stub_name = bfd_malloc (len);
2269 if (stub_name != NULL)
2270 snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
2271 (unsigned int) input_section->id,
2272 (unsigned int) sym_sec->id,
2273 (unsigned int) ELFNN_R_SYM (rel->r_info),
2280 /* Look up an entry in the stub hash. Stub entries are cached because
2281 creating the stub name takes a bit of time. */
2283 static struct elf_aarch64_stub_hash_entry *
2284 elfNN_aarch64_get_stub_entry (const asection *input_section,
2285 const asection *sym_sec,
2286 struct elf_link_hash_entry *hash,
2287 const Elf_Internal_Rela *rel,
2288 struct elf_aarch64_link_hash_table *htab)
2290 struct elf_aarch64_stub_hash_entry *stub_entry;
2291 struct elf_aarch64_link_hash_entry *h =
2292 (struct elf_aarch64_link_hash_entry *) hash;
2293 const asection *id_sec;
2295 if ((input_section->flags & SEC_CODE) == 0)
2298 /* If this input section is part of a group of sections sharing one
2299 stub section, then use the id of the first section in the group.
2300 Stub names need to include a section id, as there may well be
2301 more than one stub used to reach say, printf, and we need to
2302 distinguish between them. */
2303 id_sec = htab->stub_group[input_section->id].link_sec;
2305 if (h != NULL && h->stub_cache != NULL
2306 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
2308 stub_entry = h->stub_cache;
2314 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
2315 if (stub_name == NULL)
2318 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
2319 stub_name, FALSE, FALSE);
2321 h->stub_cache = stub_entry;
2329 /* Add a new stub entry to the stub hash. Not all fields of the new
2330 stub entry are initialised. */
2332 static struct elf_aarch64_stub_hash_entry *
2333 elfNN_aarch64_add_stub (const char *stub_name,
2335 struct elf_aarch64_link_hash_table *htab)
2339 struct elf_aarch64_stub_hash_entry *stub_entry;
2341 link_sec = htab->stub_group[section->id].link_sec;
2342 stub_sec = htab->stub_group[section->id].stub_sec;
2343 if (stub_sec == NULL)
2345 stub_sec = htab->stub_group[link_sec->id].stub_sec;
2346 if (stub_sec == NULL)
2352 namelen = strlen (link_sec->name);
2353 len = namelen + sizeof (STUB_SUFFIX);
2354 s_name = bfd_alloc (htab->stub_bfd, len);
2358 memcpy (s_name, link_sec->name, namelen);
2359 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2360 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
2361 if (stub_sec == NULL)
2363 htab->stub_group[link_sec->id].stub_sec = stub_sec;
2365 htab->stub_group[section->id].stub_sec = stub_sec;
2368 /* Enter this entry into the linker stub hash table. */
2369 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2371 if (stub_entry == NULL)
2373 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2374 section->owner, stub_name);
2378 stub_entry->stub_sec = stub_sec;
2379 stub_entry->stub_offset = 0;
2380 stub_entry->id_sec = link_sec;
2386 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
2387 void *in_arg ATTRIBUTE_UNUSED)
2389 struct elf_aarch64_stub_hash_entry *stub_entry;
2394 bfd_vma veneered_insn_loc;
2395 bfd_vma veneer_entry_loc;
2396 bfd_signed_vma branch_offset = 0;
2397 unsigned int template_size;
2398 const uint32_t *template;
2401 /* Massage our args to the form they really have. */
2402 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2404 stub_sec = stub_entry->stub_sec;
2406 /* Make a note of the offset within the stubs for this entry. */
2407 stub_entry->stub_offset = stub_sec->size;
2408 loc = stub_sec->contents + stub_entry->stub_offset;
2410 stub_bfd = stub_sec->owner;
2412 /* This is the address of the stub destination. */
2413 sym_value = (stub_entry->target_value
2414 + stub_entry->target_section->output_offset
2415 + stub_entry->target_section->output_section->vma);
2417 if (stub_entry->stub_type == aarch64_stub_long_branch)
2419 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
2420 + stub_sec->output_offset);
2422 /* See if we can relax the stub. */
2423 if (aarch64_valid_for_adrp_p (sym_value, place))
2424 stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
2427 switch (stub_entry->stub_type)
2429 case aarch64_stub_adrp_branch:
2430 template = aarch64_adrp_branch_stub;
2431 template_size = sizeof (aarch64_adrp_branch_stub);
2433 case aarch64_stub_long_branch:
2434 template = aarch64_long_branch_stub;
2435 template_size = sizeof (aarch64_long_branch_stub);
2437 case aarch64_stub_erratum_835769_veneer:
2438 template = aarch64_erratum_835769_stub;
2439 template_size = sizeof (aarch64_erratum_835769_stub);
2445 for (i = 0; i < (template_size / sizeof template[0]); i++)
2447 bfd_putl32 (template[i], loc);
2451 template_size = (template_size + 7) & ~7;
2452 stub_sec->size += template_size;
2454 switch (stub_entry->stub_type)
2456 case aarch64_stub_adrp_branch:
2457 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
2458 stub_entry->stub_offset, sym_value))
2459 /* The stub would not have been relaxed if the offset was out
2463 _bfd_final_link_relocate
2464 (elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC)),
2468 stub_entry->stub_offset + 4,
2473 case aarch64_stub_long_branch:
2474 /* We want the value relative to the address 12 bytes back from the
2476 _bfd_final_link_relocate (elfNN_aarch64_howto_from_type
2477 (AARCH64_R (PRELNN)), stub_bfd, stub_sec,
2479 stub_entry->stub_offset + 16,
2483 case aarch64_stub_erratum_835769_veneer:
2484 veneered_insn_loc = stub_entry->target_section->output_section->vma
2485 + stub_entry->target_section->output_offset
2486 + stub_entry->target_value;
2487 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
2488 + stub_entry->stub_sec->output_offset
2489 + stub_entry->stub_offset;
2490 branch_offset = veneered_insn_loc - veneer_entry_loc;
2491 branch_offset >>= 2;
2492 branch_offset &= 0x3ffffff;
2493 bfd_putl32 (stub_entry->veneered_insn,
2494 stub_sec->contents + stub_entry->stub_offset);
2495 bfd_putl32 (template[1] | branch_offset,
2496 stub_sec->contents + stub_entry->stub_offset + 4);
2506 /* As above, but don't actually build the stub. Just bump offset so
2507 we know stub section sizes. */
2510 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
2511 void *in_arg ATTRIBUTE_UNUSED)
2513 struct elf_aarch64_stub_hash_entry *stub_entry;
2516 /* Massage our args to the form they really have. */
2517 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2519 switch (stub_entry->stub_type)
2521 case aarch64_stub_adrp_branch:
2522 size = sizeof (aarch64_adrp_branch_stub);
2524 case aarch64_stub_long_branch:
2525 size = sizeof (aarch64_long_branch_stub);
2527 case aarch64_stub_erratum_835769_veneer:
2528 size = sizeof (aarch64_erratum_835769_stub);
2534 size = (size + 7) & ~7;
2535 stub_entry->stub_sec->size += size;
2539 /* External entry points for sizing and building linker stubs. */
2541 /* Set up various things so that we can make a list of input sections
2542 for each output section included in the link. Returns -1 on error,
2543 0 when no stubs will be needed, and 1 on success. */
2546 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
2547 struct bfd_link_info *info)
2550 unsigned int bfd_count;
2551 int top_id, top_index;
2553 asection **input_list, **list;
2555 struct elf_aarch64_link_hash_table *htab =
2556 elf_aarch64_hash_table (info);
2558 if (!is_elf_hash_table (htab))
2561 /* Count the number of input BFDs and find the top input section id. */
2562 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2563 input_bfd != NULL; input_bfd = input_bfd->link.next)
2566 for (section = input_bfd->sections;
2567 section != NULL; section = section->next)
2569 if (top_id < section->id)
2570 top_id = section->id;
2573 htab->bfd_count = bfd_count;
2575 amt = sizeof (struct map_stub) * (top_id + 1);
2576 htab->stub_group = bfd_zmalloc (amt);
2577 if (htab->stub_group == NULL)
2580 /* We can't use output_bfd->section_count here to find the top output
2581 section index as some sections may have been removed, and
2582 _bfd_strip_section_from_output doesn't renumber the indices. */
2583 for (section = output_bfd->sections, top_index = 0;
2584 section != NULL; section = section->next)
2586 if (top_index < section->index)
2587 top_index = section->index;
2590 htab->top_index = top_index;
2591 amt = sizeof (asection *) * (top_index + 1);
2592 input_list = bfd_malloc (amt);
2593 htab->input_list = input_list;
2594 if (input_list == NULL)
2597 /* For sections we aren't interested in, mark their entries with a
2598 value we can check later. */
2599 list = input_list + top_index;
2601 *list = bfd_abs_section_ptr;
2602 while (list-- != input_list);
2604 for (section = output_bfd->sections;
2605 section != NULL; section = section->next)
2607 if ((section->flags & SEC_CODE) != 0)
2608 input_list[section->index] = NULL;
2614 /* Used by elfNN_aarch64_next_input_section and group_sections. */
2615 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2617 /* The linker repeatedly calls this function for each input section,
2618 in the order that input sections are linked into output sections.
2619 Build lists of input sections to determine groupings between which
2620 we may insert linker stubs. */
2623 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
2625 struct elf_aarch64_link_hash_table *htab =
2626 elf_aarch64_hash_table (info);
2628 if (isec->output_section->index <= htab->top_index)
2630 asection **list = htab->input_list + isec->output_section->index;
2632 if (*list != bfd_abs_section_ptr)
2634 /* Steal the link_sec pointer for our list. */
2635 /* This happens to make the list in reverse order,
2636 which is what we want. */
2637 PREV_SEC (isec) = *list;
2643 /* See whether we can group stub sections together. Grouping stub
2644 sections may result in fewer stubs. More importantly, we need to
2645 put all .init* and .fini* stubs at the beginning of the .init or
2646 .fini output sections respectively, because glibc splits the
2647 _init and _fini functions into multiple parts. Putting a stub in
2648 the middle of a function is not a good idea. */
2651 group_sections (struct elf_aarch64_link_hash_table *htab,
2652 bfd_size_type stub_group_size,
2653 bfd_boolean stubs_always_before_branch)
2655 asection **list = htab->input_list + htab->top_index;
2659 asection *tail = *list;
2661 if (tail == bfd_abs_section_ptr)
2664 while (tail != NULL)
2668 bfd_size_type total;
2672 while ((prev = PREV_SEC (curr)) != NULL
2673 && ((total += curr->output_offset - prev->output_offset)
2677 /* OK, the size from the start of CURR to the end is less
2678 than stub_group_size and thus can be handled by one stub
2679 section. (Or the tail section is itself larger than
2680 stub_group_size, in which case we may be toast.)
2681 We should really be keeping track of the total size of
2682 stubs added here, as stubs contribute to the final output
2686 prev = PREV_SEC (tail);
2687 /* Set up this stub group. */
2688 htab->stub_group[tail->id].link_sec = curr;
2690 while (tail != curr && (tail = prev) != NULL);
2692 /* But wait, there's more! Input sections up to stub_group_size
2693 bytes before the stub section can be handled by it too. */
2694 if (!stubs_always_before_branch)
2698 && ((total += tail->output_offset - prev->output_offset)
2702 prev = PREV_SEC (tail);
2703 htab->stub_group[tail->id].link_sec = curr;
2709 while (list-- != htab->input_list);
2711 free (htab->input_list);
2716 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
2718 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
2719 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
2720 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
2721 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
2722 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
2723 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
2725 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
2726 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
2727 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
2728 #define AARCH64_ZR 0x1f
2730 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
2731 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
2733 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
2734 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
2735 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
2736 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
2737 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
2738 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
2739 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
2740 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
2741 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
2742 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
2743 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
2744 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
2745 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
2746 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
2747 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
2748 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
2749 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
2750 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
2752 /* Classify an INSN if it is indeed a load/store.
2754 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
2756 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
2759 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned.
2764 aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2,
2765 bfd_boolean *pair, bfd_boolean *load)
2773 /* Bail out quickly if INSN doesn't fall into the the load-store
2775 if (!AARCH64_LDST (insn))
2780 if (AARCH64_LDST_EX (insn))
2782 *rt = AARCH64_RT (insn);
2784 if (AARCH64_BIT (insn, 21) == 1)
2787 *rt2 = AARCH64_RT2 (insn);
2789 *load = AARCH64_LD (insn);
2792 else if (AARCH64_LDST_NAP (insn)
2793 || AARCH64_LDSTP_PI (insn)
2794 || AARCH64_LDSTP_O (insn)
2795 || AARCH64_LDSTP_PRE (insn))
2798 *rt = AARCH64_RT (insn);
2799 *rt2 = AARCH64_RT2 (insn);
2800 *load = AARCH64_LD (insn);
2803 else if (AARCH64_LDST_PCREL (insn)
2804 || AARCH64_LDST_UI (insn)
2805 || AARCH64_LDST_PIIMM (insn)
2806 || AARCH64_LDST_U (insn)
2807 || AARCH64_LDST_PREIMM (insn)
2808 || AARCH64_LDST_RO (insn)
2809 || AARCH64_LDST_UIMM (insn))
2811 *rt = AARCH64_RT (insn);
2813 if (AARCH64_LDST_PCREL (insn))
2815 opc = AARCH64_BITS (insn, 22, 2);
2816 v = AARCH64_BIT (insn, 26);
2817 opc_v = opc | (v << 2);
2818 *load = (opc_v == 1 || opc_v == 2 || opc_v == 3
2819 || opc_v == 5 || opc_v == 7);
2822 else if (AARCH64_LDST_SIMD_M (insn)
2823 || AARCH64_LDST_SIMD_M_PI (insn))
2825 *rt = AARCH64_RT (insn);
2826 *load = AARCH64_BIT (insn, 22);
2827 opcode = (insn >> 12) & 0xf;
2854 else if (AARCH64_LDST_SIMD_S (insn)
2855 || AARCH64_LDST_SIMD_S_PI (insn))
2857 *rt = AARCH64_RT (insn);
2858 r = (insn >> 21) & 1;
2859 *load = AARCH64_BIT (insn, 22);
2860 opcode = (insn >> 13) & 0x7;
2872 *rt2 = *rt + (r == 0 ? 2 : 3);
2880 *rt2 = *rt + (r == 0 ? 2 : 3);
2892 /* Return TRUE if INSN is multiply-accumulate. */
2895 aarch64_mlxl_p (uint32_t insn)
2897 uint32_t op31 = AARCH64_OP31 (insn);
2899 if (AARCH64_MAC (insn)
2900 && (op31 == 0 || op31 == 1 || op31 == 5)
2901 /* Exclude MUL instructions which are encoded as a multiple accumulate
2903 && AARCH64_RA (insn) != AARCH64_ZR)
2909 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
2910 it is possible for a 64-bit multiply-accumulate instruction to generate an
2911 incorrect result. The details are quite complex and hard to
2912 determine statically, since branches in the code may exist in some
2913 circumstances, but all cases end with a memory (load, store, or
2914 prefetch) instruction followed immediately by the multiply-accumulate
2915 operation. We employ a linker patching technique, by moving the potentially
2916 affected multiply-accumulate instruction into a patch region and replacing
2917 the original instruction with a branch to the patch. This function checks
2918 if INSN_1 is the memory operation followed by a multiply-accumulate
2919 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
2920 if INSN_1 and INSN_2 are safe. */
2923 aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2)
2933 if (aarch64_mlxl_p (insn_2)
2934 && aarch64_mem_op_p (insn_1, &rt, &rt2, &pair, &load))
2936 /* Any SIMD memory op is independent of the subsequent MLA
2937 by definition of the erratum. */
2938 if (AARCH64_BIT (insn_1, 26))
2941 /* If not SIMD, check for integer memory ops and MLA relationship. */
2942 rn = AARCH64_RN (insn_2);
2943 ra = AARCH64_RA (insn_2);
2944 rm = AARCH64_RM (insn_2);
2946 /* If this is a load and there's a true(RAW) dependency, we are safe
2947 and this is not an erratum sequence. */
2949 (rt == rn || rt == rm || rt == ra
2950 || (pair && (rt2 == rn || rt2 == rm || rt2 == ra))))
2953 /* We conservatively put out stubs for all other cases (including
2961 /* Used to order a list of mapping symbols by address. */
2964 elf_aarch64_compare_mapping (const void *a, const void *b)
2966 const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a;
2967 const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b;
2969 if (amap->vma > bmap->vma)
2971 else if (amap->vma < bmap->vma)
2973 else if (amap->type > bmap->type)
2974 /* Ensure results do not depend on the host qsort for objects with
2975 multiple mapping symbols at the same address by sorting on type
2978 else if (amap->type < bmap->type)
2985 /* Scan for cortex-a53 erratum 835769 sequence.
2987 Return TRUE else FALSE on abnormal termination. */
2990 erratum_835769_scan (bfd *input_bfd,
2991 struct bfd_link_info *info,
2992 struct aarch64_erratum_835769_fix **fixes_p,
2993 unsigned int *num_fixes_p,
2994 unsigned int *fix_table_size_p)
2997 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
2998 struct aarch64_erratum_835769_fix *fixes = *fixes_p;
2999 unsigned int num_fixes = *num_fixes_p;
3000 unsigned int fix_table_size = *fix_table_size_p;
3005 for (section = input_bfd->sections;
3007 section = section->next)
3009 bfd_byte *contents = NULL;
3010 struct _aarch64_elf_section_data *sec_data;
3013 if (elf_section_type (section) != SHT_PROGBITS
3014 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
3015 || (section->flags & SEC_EXCLUDE) != 0
3016 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
3017 || (section->output_section == bfd_abs_section_ptr))
3020 if (elf_section_data (section)->this_hdr.contents != NULL)
3021 contents = elf_section_data (section)->this_hdr.contents;
3022 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
3025 sec_data = elf_aarch64_section_data (section);
3027 qsort (sec_data->map, sec_data->mapcount,
3028 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3030 for (span = 0; span < sec_data->mapcount; span++)
3032 unsigned int span_start = sec_data->map[span].vma;
3033 unsigned int span_end = ((span == sec_data->mapcount - 1)
3034 ? sec_data->map[0].vma + section->size
3035 : sec_data->map[span + 1].vma);
3037 char span_type = sec_data->map[span].type;
3039 if (span_type == 'd')
3042 for (i = span_start; i + 4 < span_end; i += 4)
3044 uint32_t insn_1 = bfd_getl32 (contents + i);
3045 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3047 if (aarch64_erratum_sequence (insn_1, insn_2))
3049 char *stub_name = NULL;
3050 stub_name = (char *) bfd_malloc
3051 (strlen ("__erratum_835769_veneer_") + 16);
3052 if (stub_name != NULL)
3054 (stub_name,"__erratum_835769_veneer_%d", num_fixes);
3058 if (num_fixes == fix_table_size)
3060 fix_table_size *= 2;
3062 (struct aarch64_erratum_835769_fix *)
3064 sizeof (struct aarch64_erratum_835769_fix)
3070 fixes[num_fixes].input_bfd = input_bfd;
3071 fixes[num_fixes].section = section;
3072 fixes[num_fixes].offset = i + 4;
3073 fixes[num_fixes].veneered_insn = insn_2;
3074 fixes[num_fixes].stub_name = stub_name;
3075 fixes[num_fixes].stub_type = aarch64_stub_erratum_835769_veneer;
3080 if (elf_section_data (section)->this_hdr.contents == NULL)
3085 *num_fixes_p = num_fixes;
3086 *fix_table_size_p = fix_table_size;
3090 /* Find or create a stub section. */
3093 elf_aarch64_create_or_find_stub_sec (asection *section,
3094 struct elf_aarch64_link_hash_table *htab)
3099 link_sec = htab->stub_group[section->id].link_sec;
3100 BFD_ASSERT (link_sec != NULL);
3101 stub_sec = htab->stub_group[section->id].stub_sec;
3103 if (stub_sec == NULL)
3105 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3106 if (stub_sec == NULL)
3112 namelen = strlen (link_sec->name);
3113 len = namelen + sizeof (STUB_SUFFIX);
3114 s_name = (char *) bfd_alloc (htab->stub_bfd, len);
3118 memcpy (s_name, link_sec->name, namelen);
3119 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3120 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3122 if (stub_sec == NULL)
3124 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3126 htab->stub_group[section->id].stub_sec = stub_sec;
3132 /* Determine and set the size of the stub section for a final link.
3134 The basic idea here is to examine all the relocations looking for
3135 PC-relative calls to a target that is unreachable with a "bl"
3139 elfNN_aarch64_size_stubs (bfd *output_bfd,
3141 struct bfd_link_info *info,
3142 bfd_signed_vma group_size,
3143 asection * (*add_stub_section) (const char *,
3145 void (*layout_sections_again) (void))
3147 bfd_size_type stub_group_size;
3148 bfd_boolean stubs_always_before_branch;
3149 bfd_boolean stub_changed = 0;
3150 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3151 struct aarch64_erratum_835769_fix *erratum_835769_fixes = NULL;
3152 unsigned int num_erratum_835769_fixes = 0;
3153 unsigned int erratum_835769_fix_table_size = 10;
3156 if (htab->fix_erratum_835769)
3158 erratum_835769_fixes
3159 = (struct aarch64_erratum_835769_fix *)
3161 (sizeof (struct aarch64_erratum_835769_fix) *
3162 erratum_835769_fix_table_size);
3163 if (erratum_835769_fixes == NULL)
3164 goto error_ret_free_local;
3167 /* Propagate mach to stub bfd, because it may not have been
3168 finalized when we created stub_bfd. */
3169 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3170 bfd_get_mach (output_bfd));
3172 /* Stash our params away. */
3173 htab->stub_bfd = stub_bfd;
3174 htab->add_stub_section = add_stub_section;
3175 htab->layout_sections_again = layout_sections_again;
3176 stubs_always_before_branch = group_size < 0;
3178 stub_group_size = -group_size;
3180 stub_group_size = group_size;
3182 if (stub_group_size == 1)
3184 /* Default values. */
3185 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
3186 stub_group_size = 127 * 1024 * 1024;
3189 group_sections (htab, stub_group_size, stubs_always_before_branch);
3195 unsigned prev_num_erratum_835769_fixes = num_erratum_835769_fixes;
3197 num_erratum_835769_fixes = 0;
3198 for (input_bfd = info->input_bfds;
3199 input_bfd != NULL; input_bfd = input_bfd->link.next)
3201 Elf_Internal_Shdr *symtab_hdr;
3203 Elf_Internal_Sym *local_syms = NULL;
3205 /* We'll need the symbol table in a second. */
3206 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3207 if (symtab_hdr->sh_info == 0)
3210 /* Walk over each section attached to the input bfd. */
3211 for (section = input_bfd->sections;
3212 section != NULL; section = section->next)
3214 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3216 /* If there aren't any relocs, then there's nothing more
3218 if ((section->flags & SEC_RELOC) == 0
3219 || section->reloc_count == 0
3220 || (section->flags & SEC_CODE) == 0)
3223 /* If this section is a link-once section that will be
3224 discarded, then don't create any stubs. */
3225 if (section->output_section == NULL
3226 || section->output_section->owner != output_bfd)
3229 /* Get the relocs. */
3231 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3232 NULL, info->keep_memory);
3233 if (internal_relocs == NULL)
3234 goto error_ret_free_local;
3236 /* Now examine each relocation. */
3237 irela = internal_relocs;
3238 irelaend = irela + section->reloc_count;
3239 for (; irela < irelaend; irela++)
3241 unsigned int r_type, r_indx;
3242 enum elf_aarch64_stub_type stub_type;
3243 struct elf_aarch64_stub_hash_entry *stub_entry;
3246 bfd_vma destination;
3247 struct elf_aarch64_link_hash_entry *hash;
3248 const char *sym_name;
3250 const asection *id_sec;
3251 unsigned char st_type;
3254 r_type = ELFNN_R_TYPE (irela->r_info);
3255 r_indx = ELFNN_R_SYM (irela->r_info);
3257 if (r_type >= (unsigned int) R_AARCH64_end)
3259 bfd_set_error (bfd_error_bad_value);
3260 error_ret_free_internal:
3261 if (elf_section_data (section)->relocs == NULL)
3262 free (internal_relocs);
3263 goto error_ret_free_local;
3266 /* Only look for stubs on unconditional branch and
3267 branch and link instructions. */
3268 if (r_type != (unsigned int) AARCH64_R (CALL26)
3269 && r_type != (unsigned int) AARCH64_R (JUMP26))
3272 /* Now determine the call target, its name, value,
3279 if (r_indx < symtab_hdr->sh_info)
3281 /* It's a local symbol. */
3282 Elf_Internal_Sym *sym;
3283 Elf_Internal_Shdr *hdr;
3285 if (local_syms == NULL)
3288 = (Elf_Internal_Sym *) symtab_hdr->contents;
3289 if (local_syms == NULL)
3291 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3292 symtab_hdr->sh_info, 0,
3294 if (local_syms == NULL)
3295 goto error_ret_free_internal;
3298 sym = local_syms + r_indx;
3299 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3300 sym_sec = hdr->bfd_section;
3302 /* This is an undefined symbol. It can never
3306 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3307 sym_value = sym->st_value;
3308 destination = (sym_value + irela->r_addend
3309 + sym_sec->output_offset
3310 + sym_sec->output_section->vma);
3311 st_type = ELF_ST_TYPE (sym->st_info);
3313 = bfd_elf_string_from_elf_section (input_bfd,
3314 symtab_hdr->sh_link,
3321 e_indx = r_indx - symtab_hdr->sh_info;
3322 hash = ((struct elf_aarch64_link_hash_entry *)
3323 elf_sym_hashes (input_bfd)[e_indx]);
3325 while (hash->root.root.type == bfd_link_hash_indirect
3326 || hash->root.root.type == bfd_link_hash_warning)
3327 hash = ((struct elf_aarch64_link_hash_entry *)
3328 hash->root.root.u.i.link);
3330 if (hash->root.root.type == bfd_link_hash_defined
3331 || hash->root.root.type == bfd_link_hash_defweak)
3333 struct elf_aarch64_link_hash_table *globals =
3334 elf_aarch64_hash_table (info);
3335 sym_sec = hash->root.root.u.def.section;
3336 sym_value = hash->root.root.u.def.value;
3337 /* For a destination in a shared library,
3338 use the PLT stub as target address to
3339 decide whether a branch stub is
3341 if (globals->root.splt != NULL && hash != NULL
3342 && hash->root.plt.offset != (bfd_vma) - 1)
3344 sym_sec = globals->root.splt;
3345 sym_value = hash->root.plt.offset;
3346 if (sym_sec->output_section != NULL)
3347 destination = (sym_value
3348 + sym_sec->output_offset
3350 sym_sec->output_section->vma);
3352 else if (sym_sec->output_section != NULL)
3353 destination = (sym_value + irela->r_addend
3354 + sym_sec->output_offset
3355 + sym_sec->output_section->vma);
3357 else if (hash->root.root.type == bfd_link_hash_undefined
3358 || (hash->root.root.type
3359 == bfd_link_hash_undefweak))
3361 /* For a shared library, use the PLT stub as
3362 target address to decide whether a long
3363 branch stub is needed.
3364 For absolute code, they cannot be handled. */
3365 struct elf_aarch64_link_hash_table *globals =
3366 elf_aarch64_hash_table (info);
3368 if (globals->root.splt != NULL && hash != NULL
3369 && hash->root.plt.offset != (bfd_vma) - 1)
3371 sym_sec = globals->root.splt;
3372 sym_value = hash->root.plt.offset;
3373 if (sym_sec->output_section != NULL)
3374 destination = (sym_value
3375 + sym_sec->output_offset
3377 sym_sec->output_section->vma);
3384 bfd_set_error (bfd_error_bad_value);
3385 goto error_ret_free_internal;
3387 st_type = ELF_ST_TYPE (hash->root.type);
3388 sym_name = hash->root.root.root.string;
3391 /* Determine what (if any) linker stub is needed. */
3392 stub_type = aarch64_type_of_stub
3393 (info, section, irela, st_type, hash, destination);
3394 if (stub_type == aarch64_stub_none)
3397 /* Support for grouping stub sections. */
3398 id_sec = htab->stub_group[section->id].link_sec;
3400 /* Get the name of this stub. */
3401 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
3404 goto error_ret_free_internal;
3407 aarch64_stub_hash_lookup (&htab->stub_hash_table,
3408 stub_name, FALSE, FALSE);
3409 if (stub_entry != NULL)
3411 /* The proper stub has already been created. */
3416 stub_entry = elfNN_aarch64_add_stub (stub_name, section,
3418 if (stub_entry == NULL)
3421 goto error_ret_free_internal;
3424 stub_entry->target_value = sym_value;
3425 stub_entry->target_section = sym_sec;
3426 stub_entry->stub_type = stub_type;
3427 stub_entry->h = hash;
3428 stub_entry->st_type = st_type;
3430 if (sym_name == NULL)
3431 sym_name = "unnamed";
3432 len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
3433 stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
3434 if (stub_entry->output_name == NULL)
3437 goto error_ret_free_internal;
3440 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
3443 stub_changed = TRUE;
3446 /* We're done with the internal relocs, free them. */
3447 if (elf_section_data (section)->relocs == NULL)
3448 free (internal_relocs);
3451 if (htab->fix_erratum_835769)
3453 /* Scan for sequences which might trigger erratum 835769. */
3454 if (!erratum_835769_scan (input_bfd, info, &erratum_835769_fixes,
3455 &num_erratum_835769_fixes,
3456 &erratum_835769_fix_table_size))
3457 goto error_ret_free_local;
3461 if (prev_num_erratum_835769_fixes != num_erratum_835769_fixes)
3462 stub_changed = TRUE;
3467 /* OK, we've added some stubs. Find out the new size of the
3469 for (stub_sec = htab->stub_bfd->sections;
3470 stub_sec != NULL; stub_sec = stub_sec->next)
3472 /* Ignore non-stub sections. */
3473 if (!strstr (stub_sec->name, STUB_SUFFIX))
3478 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
3480 /* Add erratum 835769 veneers to stub section sizes too. */
3481 if (htab->fix_erratum_835769)
3482 for (i = 0; i < num_erratum_835769_fixes; i++)
3484 stub_sec = elf_aarch64_create_or_find_stub_sec
3485 (erratum_835769_fixes[i].section, htab);
3487 if (stub_sec == NULL)
3488 goto error_ret_free_local;
3490 stub_sec->size += 8;
3493 /* Ask the linker to do its stuff. */
3494 (*htab->layout_sections_again) ();
3495 stub_changed = FALSE;
3498 /* Add stubs for erratum 835769 fixes now. */
3499 if (htab->fix_erratum_835769)
3501 for (i = 0; i < num_erratum_835769_fixes; i++)
3503 struct elf_aarch64_stub_hash_entry *stub_entry;
3504 char *stub_name = erratum_835769_fixes[i].stub_name;
3505 asection *section = erratum_835769_fixes[i].section;
3506 unsigned int section_id = erratum_835769_fixes[i].section->id;
3507 asection *link_sec = htab->stub_group[section_id].link_sec;
3508 asection *stub_sec = htab->stub_group[section_id].stub_sec;
3510 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
3511 stub_name, TRUE, FALSE);
3512 if (stub_entry == NULL)
3514 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3520 stub_entry->stub_sec = stub_sec;
3521 stub_entry->stub_offset = 0;
3522 stub_entry->id_sec = link_sec;
3523 stub_entry->stub_type = erratum_835769_fixes[i].stub_type;
3524 stub_entry->target_section = section;
3525 stub_entry->target_value = erratum_835769_fixes[i].offset;
3526 stub_entry->veneered_insn = erratum_835769_fixes[i].veneered_insn;
3527 stub_entry->output_name = erratum_835769_fixes[i].stub_name;
3533 error_ret_free_local:
3537 /* Build all the stubs associated with the current output file. The
3538 stubs are kept in a hash table attached to the main linker hash
3539 table. We also set up the .plt entries for statically linked PIC
3540 functions here. This function is called via aarch64_elf_finish in the
3544 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
3547 struct bfd_hash_table *table;
3548 struct elf_aarch64_link_hash_table *htab;
3550 htab = elf_aarch64_hash_table (info);
3552 for (stub_sec = htab->stub_bfd->sections;
3553 stub_sec != NULL; stub_sec = stub_sec->next)
3557 /* Ignore non-stub sections. */
3558 if (!strstr (stub_sec->name, STUB_SUFFIX))
3561 /* Allocate memory to hold the linker stubs. */
3562 size = stub_sec->size;
3563 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
3564 if (stub_sec->contents == NULL && size != 0)
3569 /* Build the stubs as directed by the stub hash table. */
3570 table = &htab->stub_hash_table;
3571 bfd_hash_traverse (table, aarch64_build_one_stub, info);
3577 /* Add an entry to the code/data map for section SEC. */
3580 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
3582 struct _aarch64_elf_section_data *sec_data =
3583 elf_aarch64_section_data (sec);
3584 unsigned int newidx;
3586 if (sec_data->map == NULL)
3588 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
3589 sec_data->mapcount = 0;
3590 sec_data->mapsize = 1;
3593 newidx = sec_data->mapcount++;
3595 if (sec_data->mapcount > sec_data->mapsize)
3597 sec_data->mapsize *= 2;
3598 sec_data->map = bfd_realloc_or_free
3599 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
3604 sec_data->map[newidx].vma = vma;
3605 sec_data->map[newidx].type = type;
3610 /* Initialise maps of insn/data for input BFDs. */
3612 bfd_elfNN_aarch64_init_maps (bfd *abfd)
3614 Elf_Internal_Sym *isymbuf;
3615 Elf_Internal_Shdr *hdr;
3616 unsigned int i, localsyms;
3618 /* Make sure that we are dealing with an AArch64 elf binary. */
3619 if (!is_aarch64_elf (abfd))
3622 if ((abfd->flags & DYNAMIC) != 0)
3625 hdr = &elf_symtab_hdr (abfd);
3626 localsyms = hdr->sh_info;
3628 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3629 should contain the number of local symbols, which should come before any
3630 global symbols. Mapping symbols are always local. */
3631 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
3633 /* No internal symbols read? Skip this BFD. */
3634 if (isymbuf == NULL)
3637 for (i = 0; i < localsyms; i++)
3639 Elf_Internal_Sym *isym = &isymbuf[i];
3640 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3643 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
3645 name = bfd_elf_string_from_elf_section (abfd,
3649 if (bfd_is_aarch64_special_symbol_name
3650 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
3651 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
3656 /* Set option values needed during linking. */
3658 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
3659 struct bfd_link_info *link_info,
3661 int no_wchar_warn, int pic_veneer,
3662 int fix_erratum_835769)
3664 struct elf_aarch64_link_hash_table *globals;
3666 globals = elf_aarch64_hash_table (link_info);
3667 globals->pic_veneer = pic_veneer;
3668 globals->fix_erratum_835769 = fix_erratum_835769;
3670 BFD_ASSERT (is_aarch64_elf (output_bfd));
3671 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
3672 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
3676 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
3677 struct elf_aarch64_link_hash_table
3678 *globals, struct bfd_link_info *info,
3679 bfd_vma value, bfd *output_bfd,
3680 bfd_boolean *unresolved_reloc_p)
3682 bfd_vma off = (bfd_vma) - 1;
3683 asection *basegot = globals->root.sgot;
3684 bfd_boolean dyn = globals->root.dynamic_sections_created;
3688 BFD_ASSERT (basegot != NULL);
3689 off = h->got.offset;
3690 BFD_ASSERT (off != (bfd_vma) - 1);
3691 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3693 && SYMBOL_REFERENCES_LOCAL (info, h))
3694 || (ELF_ST_VISIBILITY (h->other)
3695 && h->root.type == bfd_link_hash_undefweak))
3697 /* This is actually a static link, or it is a -Bsymbolic link
3698 and the symbol is defined locally. We must initialize this
3699 entry in the global offset table. Since the offset must
3700 always be a multiple of 8 (4 in the case of ILP32), we use
3701 the least significant bit to record whether we have
3702 initialized it already.
3703 When doing a dynamic link, we create a .rel(a).got relocation
3704 entry to initialize the value. This is done in the
3705 finish_dynamic_symbol routine. */
3710 bfd_put_NN (output_bfd, value, basegot->contents + off);
3715 *unresolved_reloc_p = FALSE;
3717 off = off + basegot->output_section->vma + basegot->output_offset;
3723 /* Change R_TYPE to a more efficient access model where possible,
3724 return the new reloc type. */
3726 static bfd_reloc_code_real_type
3727 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
3728 struct elf_link_hash_entry *h)
3730 bfd_boolean is_local = h == NULL;
3734 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3735 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3737 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
3738 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
3740 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
3742 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
3745 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
3747 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
3748 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
3750 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3751 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
3753 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
3754 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
3756 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3757 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
3759 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
3760 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
3762 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
3765 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
3767 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
3768 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
3770 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3771 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3772 /* Instructions with these relocations will become NOPs. */
3773 return BFD_RELOC_AARCH64_NONE;
3783 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
3787 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
3788 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
3789 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
3790 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
3793 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3794 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
3795 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3798 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3799 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3800 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
3801 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3802 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
3803 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
3804 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
3805 return GOT_TLSDESC_GD;
3807 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3808 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
3809 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
3810 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
3813 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
3814 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
3815 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
3816 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
3817 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
3818 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
3819 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
3820 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
3830 aarch64_can_relax_tls (bfd *input_bfd,
3831 struct bfd_link_info *info,
3832 bfd_reloc_code_real_type r_type,
3833 struct elf_link_hash_entry *h,
3834 unsigned long r_symndx)
3836 unsigned int symbol_got_type;
3837 unsigned int reloc_got_type;
3839 if (! IS_AARCH64_TLS_RELOC (r_type))
3842 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
3843 reloc_got_type = aarch64_reloc_got_type (r_type);
3845 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
3851 if (h && h->root.type == bfd_link_hash_undefweak)
3857 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
3860 static bfd_reloc_code_real_type
3861 aarch64_tls_transition (bfd *input_bfd,
3862 struct bfd_link_info *info,
3863 unsigned int r_type,
3864 struct elf_link_hash_entry *h,
3865 unsigned long r_symndx)
3867 bfd_reloc_code_real_type bfd_r_type
3868 = elfNN_aarch64_bfd_reloc_from_type (r_type);
3870 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
3873 return aarch64_tls_transition_without_check (bfd_r_type, h);
3876 /* Return the base VMA address which should be subtracted from real addresses
3877 when resolving R_AARCH64_TLS_DTPREL relocation. */
3880 dtpoff_base (struct bfd_link_info *info)
3882 /* If tls_sec is NULL, we should have signalled an error already. */
3883 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
3884 return elf_hash_table (info)->tls_sec->vma;
3887 /* Return the base VMA address which should be subtracted from real addresses
3888 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
3891 tpoff_base (struct bfd_link_info *info)
3893 struct elf_link_hash_table *htab = elf_hash_table (info);
3895 /* If tls_sec is NULL, we should have signalled an error already. */
3896 BFD_ASSERT (htab->tls_sec != NULL);
3898 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
3899 htab->tls_sec->alignment_power);
3900 return htab->tls_sec->vma - base;
3904 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3905 unsigned long r_symndx)
3907 /* Calculate the address of the GOT entry for symbol
3908 referred to in h. */
3910 return &h->got.offset;
3914 struct elf_aarch64_local_symbol *l;
3916 l = elf_aarch64_locals (input_bfd);
3917 return &l[r_symndx].got_offset;
3922 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3923 unsigned long r_symndx)
3926 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
3931 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
3932 unsigned long r_symndx)
3935 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3940 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3941 unsigned long r_symndx)
3944 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3950 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3951 unsigned long r_symndx)
3953 /* Calculate the address of the GOT entry for symbol
3954 referred to in h. */
3957 struct elf_aarch64_link_hash_entry *eh;
3958 eh = (struct elf_aarch64_link_hash_entry *) h;
3959 return &eh->tlsdesc_got_jump_table_offset;
3964 struct elf_aarch64_local_symbol *l;
3966 l = elf_aarch64_locals (input_bfd);
3967 return &l[r_symndx].tlsdesc_got_jump_table_offset;
3972 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3973 unsigned long r_symndx)
3976 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3981 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
3982 struct elf_link_hash_entry *h,
3983 unsigned long r_symndx)
3986 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3991 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3992 unsigned long r_symndx)
3995 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4000 /* Data for make_branch_to_erratum_835769_stub(). */
4002 struct erratum_835769_branch_to_stub_data
4004 asection *output_section;
4008 /* Helper to insert branches to erratum 835769 stubs in the right
4009 places for a particular section. */
4012 make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry,
4015 struct elf_aarch64_stub_hash_entry *stub_entry;
4016 struct erratum_835769_branch_to_stub_data *data;
4018 unsigned long branch_insn = 0;
4019 bfd_vma veneered_insn_loc, veneer_entry_loc;
4020 bfd_signed_vma branch_offset;
4021 unsigned int target;
4024 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
4025 data = (struct erratum_835769_branch_to_stub_data *) in_arg;
4027 if (stub_entry->target_section != data->output_section
4028 || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer)
4031 contents = data->contents;
4032 veneered_insn_loc = stub_entry->target_section->output_section->vma
4033 + stub_entry->target_section->output_offset
4034 + stub_entry->target_value;
4035 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4036 + stub_entry->stub_sec->output_offset
4037 + stub_entry->stub_offset;
4038 branch_offset = veneer_entry_loc - veneered_insn_loc;
4040 abfd = stub_entry->target_section->owner;
4041 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4042 (*_bfd_error_handler)
4043 (_("%B: error: Erratum 835769 stub out "
4044 "of range (input file too large)"), abfd);
4046 target = stub_entry->target_value;
4047 branch_insn = 0x14000000;
4048 branch_offset >>= 2;
4049 branch_offset &= 0x3ffffff;
4050 branch_insn |= branch_offset;
4051 bfd_putl32 (branch_insn, &contents[target]);
4057 elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED,
4058 struct bfd_link_info *link_info,
4063 struct elf_aarch64_link_hash_table *globals =
4064 elf_aarch64_hash_table (link_info);
4066 if (globals == NULL)
4069 /* Fix code to point to erratum 835769 stubs. */
4070 if (globals->fix_erratum_835769)
4072 struct erratum_835769_branch_to_stub_data data;
4074 data.output_section = sec;
4075 data.contents = contents;
4076 bfd_hash_traverse (&globals->stub_hash_table,
4077 make_branch_to_erratum_835769_stub, &data);
4083 /* Perform a relocation as part of a final link. */
4084 static bfd_reloc_status_type
4085 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
4088 asection *input_section,
4090 Elf_Internal_Rela *rel,
4092 struct bfd_link_info *info,
4094 struct elf_link_hash_entry *h,
4095 bfd_boolean *unresolved_reloc_p,
4096 bfd_boolean save_addend,
4097 bfd_vma *saved_addend,
4098 Elf_Internal_Sym *sym)
4100 Elf_Internal_Shdr *symtab_hdr;
4101 unsigned int r_type = howto->type;
4102 bfd_reloc_code_real_type bfd_r_type
4103 = elfNN_aarch64_bfd_reloc_from_howto (howto);
4104 bfd_reloc_code_real_type new_bfd_r_type;
4105 unsigned long r_symndx;
4106 bfd_byte *hit_data = contents + rel->r_offset;
4108 bfd_signed_vma signed_addend;
4109 struct elf_aarch64_link_hash_table *globals;
4110 bfd_boolean weak_undef_p;
4112 globals = elf_aarch64_hash_table (info);
4114 symtab_hdr = &elf_symtab_hdr (input_bfd);
4116 BFD_ASSERT (is_aarch64_elf (input_bfd));
4118 r_symndx = ELFNN_R_SYM (rel->r_info);
4120 /* It is possible to have linker relaxations on some TLS access
4121 models. Update our information here. */
4122 new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx);
4123 if (new_bfd_r_type != bfd_r_type)
4125 bfd_r_type = new_bfd_r_type;
4126 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4127 BFD_ASSERT (howto != NULL);
4128 r_type = howto->type;
4131 place = input_section->output_section->vma
4132 + input_section->output_offset + rel->r_offset;
4134 /* Get addend, accumulating the addend for consecutive relocs
4135 which refer to the same offset. */
4136 signed_addend = saved_addend ? *saved_addend : 0;
4137 signed_addend += rel->r_addend;
4139 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
4140 : bfd_is_und_section (sym_sec));
4142 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4143 it here if it is defined in a non-shared object. */
4145 && h->type == STT_GNU_IFUNC
4153 if ((input_section->flags & SEC_ALLOC) == 0
4154 || h->plt.offset == (bfd_vma) -1)
4157 /* STT_GNU_IFUNC symbol must go through PLT. */
4158 plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
4159 value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
4164 if (h->root.root.string)
4165 name = h->root.root.string;
4167 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4169 (*_bfd_error_handler)
4170 (_("%B: relocation %s against STT_GNU_IFUNC "
4171 "symbol `%s' isn't handled by %s"), input_bfd,
4172 howto->name, name, __FUNCTION__);
4173 bfd_set_error (bfd_error_bad_value);
4176 case BFD_RELOC_AARCH64_NN:
4177 if (rel->r_addend != 0)
4179 if (h->root.root.string)
4180 name = h->root.root.string;
4182 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4184 (*_bfd_error_handler)
4185 (_("%B: relocation %s against STT_GNU_IFUNC "
4186 "symbol `%s' has non-zero addend: %d"),
4187 input_bfd, howto->name, name, rel->r_addend);
4188 bfd_set_error (bfd_error_bad_value);
4192 /* Generate dynamic relocation only when there is a
4193 non-GOT reference in a shared object. */
4194 if (info->shared && h->non_got_ref)
4196 Elf_Internal_Rela outrel;
4199 /* Need a dynamic relocation to get the real function
4201 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4205 if (outrel.r_offset == (bfd_vma) -1
4206 || outrel.r_offset == (bfd_vma) -2)
4209 outrel.r_offset += (input_section->output_section->vma
4210 + input_section->output_offset);
4212 if (h->dynindx == -1
4214 || info->executable)
4216 /* This symbol is resolved locally. */
4217 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
4218 outrel.r_addend = (h->root.u.def.value
4219 + h->root.u.def.section->output_section->vma
4220 + h->root.u.def.section->output_offset);
4224 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4225 outrel.r_addend = 0;
4228 sreloc = globals->root.irelifunc;
4229 elf_append_rela (output_bfd, sreloc, &outrel);
4231 /* If this reloc is against an external symbol, we
4232 do not want to fiddle with the addend. Otherwise,
4233 we need to include the symbol value so that it
4234 becomes an addend for the dynamic reloc. For an
4235 internal symbol, we have updated addend. */
4236 return bfd_reloc_ok;
4239 case BFD_RELOC_AARCH64_JUMP26:
4240 case BFD_RELOC_AARCH64_CALL26:
4241 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4244 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
4246 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4247 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4248 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4249 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4250 base_got = globals->root.sgot;
4251 off = h->got.offset;
4253 if (base_got == NULL)
4256 if (off == (bfd_vma) -1)
4260 /* We can't use h->got.offset here to save state, or
4261 even just remember the offset, as finish_dynamic_symbol
4262 would use that as offset into .got. */
4264 if (globals->root.splt != NULL)
4266 plt_index = ((h->plt.offset - globals->plt_header_size) /
4267 globals->plt_entry_size);
4268 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4269 base_got = globals->root.sgotplt;
4273 plt_index = h->plt.offset / globals->plt_entry_size;
4274 off = plt_index * GOT_ENTRY_SIZE;
4275 base_got = globals->root.igotplt;
4278 if (h->dynindx == -1
4282 /* This references the local definition. We must
4283 initialize this entry in the global offset table.
4284 Since the offset must always be a multiple of 8,
4285 we use the least significant bit to record
4286 whether we have initialized it already.
4288 When doing a dynamic link, we create a .rela.got
4289 relocation entry to initialize the value. This
4290 is done in the finish_dynamic_symbol routine. */
4295 bfd_put_NN (output_bfd, value,
4296 base_got->contents + off);
4297 /* Note that this is harmless as -1 | 1 still is -1. */
4301 value = (base_got->output_section->vma
4302 + base_got->output_offset + off);
4305 value = aarch64_calculate_got_entry_vma (h, globals, info,
4307 unresolved_reloc_p);
4308 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4310 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
4311 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4312 case BFD_RELOC_AARCH64_ADD_LO12:
4319 case BFD_RELOC_AARCH64_NONE:
4320 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4321 *unresolved_reloc_p = FALSE;
4322 return bfd_reloc_ok;
4324 case BFD_RELOC_AARCH64_NN:
4326 /* When generating a shared object or relocatable executable, these
4327 relocations are copied into the output file to be resolved at
4329 if (((info->shared == TRUE) || globals->root.is_relocatable_executable)
4330 && (input_section->flags & SEC_ALLOC)
4332 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4333 || h->root.type != bfd_link_hash_undefweak))
4335 Elf_Internal_Rela outrel;
4337 bfd_boolean skip, relocate;
4340 *unresolved_reloc_p = FALSE;
4345 outrel.r_addend = signed_addend;
4347 _bfd_elf_section_offset (output_bfd, info, input_section,
4349 if (outrel.r_offset == (bfd_vma) - 1)
4351 else if (outrel.r_offset == (bfd_vma) - 2)
4357 outrel.r_offset += (input_section->output_section->vma
4358 + input_section->output_offset);
4361 memset (&outrel, 0, sizeof outrel);
4364 && (!info->shared || !SYMBOLIC_BIND (info, h) || !h->def_regular))
4365 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4370 /* On SVR4-ish systems, the dynamic loader cannot
4371 relocate the text and data segments independently,
4372 so the symbol does not matter. */
4374 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
4375 outrel.r_addend += value;
4378 sreloc = elf_section_data (input_section)->sreloc;
4379 if (sreloc == NULL || sreloc->contents == NULL)
4380 return bfd_reloc_notsupported;
4382 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
4383 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
4385 if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
4387 /* Sanity to check that we have previously allocated
4388 sufficient space in the relocation section for the
4389 number of relocations we actually want to emit. */
4393 /* If this reloc is against an external symbol, we do not want to
4394 fiddle with the addend. Otherwise, we need to include the symbol
4395 value so that it becomes an addend for the dynamic reloc. */
4397 return bfd_reloc_ok;
4399 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4400 contents, rel->r_offset, value,
4404 value += signed_addend;
4407 case BFD_RELOC_AARCH64_JUMP26:
4408 case BFD_RELOC_AARCH64_CALL26:
4410 asection *splt = globals->root.splt;
4411 bfd_boolean via_plt_p =
4412 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
4414 /* A call to an undefined weak symbol is converted to a jump to
4415 the next instruction unless a PLT entry will be created.
4416 The jump to the next instruction is optimized as a NOP.
4417 Do the same for local undefined symbols. */
4418 if (weak_undef_p && ! via_plt_p)
4420 bfd_putl32 (INSN_NOP, hit_data);
4421 return bfd_reloc_ok;
4424 /* If the call goes through a PLT entry, make sure to
4425 check distance to the right destination address. */
4428 value = (splt->output_section->vma
4429 + splt->output_offset + h->plt.offset);
4430 *unresolved_reloc_p = FALSE;
4433 /* If the target symbol is global and marked as a function the
4434 relocation applies a function call or a tail call. In this
4435 situation we can veneer out of range branches. The veneers
4436 use IP0 and IP1 hence cannot be used arbitrary out of range
4437 branches that occur within the body of a function. */
4438 if (h && h->type == STT_FUNC)
4440 /* Check if a stub has to be inserted because the destination
4442 if (! aarch64_valid_branch_p (value, place))
4444 /* The target is out of reach, so redirect the branch to
4445 the local stub for this function. */
4446 struct elf_aarch64_stub_hash_entry *stub_entry;
4447 stub_entry = elfNN_aarch64_get_stub_entry (input_section,
4450 if (stub_entry != NULL)
4451 value = (stub_entry->stub_offset
4452 + stub_entry->stub_sec->output_offset
4453 + stub_entry->stub_sec->output_section->vma);
4457 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4458 signed_addend, weak_undef_p);
4461 case BFD_RELOC_AARCH64_16:
4463 case BFD_RELOC_AARCH64_32:
4465 case BFD_RELOC_AARCH64_ADD_LO12:
4466 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
4467 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4468 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
4469 case BFD_RELOC_AARCH64_BRANCH19:
4470 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
4471 case BFD_RELOC_AARCH64_LDST8_LO12:
4472 case BFD_RELOC_AARCH64_LDST16_LO12:
4473 case BFD_RELOC_AARCH64_LDST32_LO12:
4474 case BFD_RELOC_AARCH64_LDST64_LO12:
4475 case BFD_RELOC_AARCH64_LDST128_LO12:
4476 case BFD_RELOC_AARCH64_MOVW_G0_S:
4477 case BFD_RELOC_AARCH64_MOVW_G1_S:
4478 case BFD_RELOC_AARCH64_MOVW_G2_S:
4479 case BFD_RELOC_AARCH64_MOVW_G0:
4480 case BFD_RELOC_AARCH64_MOVW_G0_NC:
4481 case BFD_RELOC_AARCH64_MOVW_G1:
4482 case BFD_RELOC_AARCH64_MOVW_G1_NC:
4483 case BFD_RELOC_AARCH64_MOVW_G2:
4484 case BFD_RELOC_AARCH64_MOVW_G2_NC:
4485 case BFD_RELOC_AARCH64_MOVW_G3:
4486 case BFD_RELOC_AARCH64_16_PCREL:
4487 case BFD_RELOC_AARCH64_32_PCREL:
4488 case BFD_RELOC_AARCH64_64_PCREL:
4489 case BFD_RELOC_AARCH64_TSTBR14:
4490 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4491 signed_addend, weak_undef_p);
4494 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4495 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4496 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4497 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4498 if (globals->root.sgot == NULL)
4499 BFD_ASSERT (h != NULL);
4503 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
4505 unresolved_reloc_p);
4506 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4511 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4512 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4513 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4514 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4515 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4516 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4517 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4518 if (globals->root.sgot == NULL)
4519 return bfd_reloc_notsupported;
4521 value = (symbol_got_offset (input_bfd, h, r_symndx)
4522 + globals->root.sgot->output_section->vma
4523 + globals->root.sgot->output_offset);
4525 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4527 *unresolved_reloc_p = FALSE;
4530 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4531 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4532 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4533 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4534 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4535 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4536 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4537 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4538 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4539 signed_addend - tpoff_base (info),
4541 *unresolved_reloc_p = FALSE;
4544 case BFD_RELOC_AARCH64_TLSDESC_ADD:
4545 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4546 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4547 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4548 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4549 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
4550 case BFD_RELOC_AARCH64_TLSDESC_LDR:
4551 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4552 if (globals->root.sgot == NULL)
4553 return bfd_reloc_notsupported;
4554 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
4555 + globals->root.sgotplt->output_section->vma
4556 + globals->root.sgotplt->output_offset
4557 + globals->sgotplt_jump_table_size);
4559 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4561 *unresolved_reloc_p = FALSE;
4565 return bfd_reloc_notsupported;
4569 *saved_addend = value;
4571 /* Only apply the final relocation in a sequence. */
4573 return bfd_reloc_continue;
4575 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
4579 /* Handle TLS relaxations. Relaxing is possible for symbols that use
4580 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
4583 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
4584 is to then call final_link_relocate. Return other values in the
4587 static bfd_reloc_status_type
4588 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
4589 bfd *input_bfd, bfd_byte *contents,
4590 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
4592 bfd_boolean is_local = h == NULL;
4593 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
4596 BFD_ASSERT (globals && input_bfd && contents && rel);
4598 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
4600 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4601 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4604 /* GD->LE relaxation:
4605 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
4607 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
4609 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
4610 return bfd_reloc_continue;
4614 /* GD->IE relaxation:
4615 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
4617 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
4619 return bfd_reloc_continue;
4622 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4626 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4629 /* Tiny TLSDESC->LE relaxation:
4630 ldr x1, :tlsdesc:var => movz x0, #:tprel_g1:var
4631 adr x0, :tlsdesc:var => movk x0, #:tprel_g0_nc:var
4635 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
4636 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
4638 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
4639 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
4640 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4642 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
4643 bfd_putl32 (0xf2800000, contents + rel->r_offset + 4);
4644 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
4645 return bfd_reloc_continue;
4649 /* Tiny TLSDESC->IE relaxation:
4650 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
4651 adr x0, :tlsdesc:var => nop
4655 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
4656 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
4658 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4659 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4661 bfd_putl32 (0x58000000, contents + rel->r_offset);
4662 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
4663 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
4664 return bfd_reloc_continue;
4667 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4670 /* Tiny GD->LE relaxation:
4671 adr x0, :tlsgd:var => mrs x1, tpidr_el0
4672 bl __tls_get_addr => add x0, x1, #:tprel_hi12:x, lsl #12
4673 nop => add x0, x0, #:tprel_lo12_nc:x
4676 /* First kill the tls_get_addr reloc on the bl instruction. */
4677 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
4679 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0);
4680 bfd_putl32 (0x91400020, contents + rel->r_offset + 4);
4681 bfd_putl32 (0x91000000, contents + rel->r_offset + 8);
4683 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
4684 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC));
4685 rel[1].r_offset = rel->r_offset + 8;
4687 /* Move the current relocation to the second instruction in
4690 rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
4691 AARCH64_R (TLSLE_ADD_TPREL_HI12));
4692 return bfd_reloc_continue;
4696 /* Tiny GD->IE relaxation:
4697 adr x0, :tlsgd:var => ldr x0, :gottprel:var
4698 bl __tls_get_addr => mrs x1, tpidr_el0
4699 nop => add x0, x0, x1
4702 /* First kill the tls_get_addr reloc on the bl instruction. */
4703 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
4704 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4706 bfd_putl32 (0x58000000, contents + rel->r_offset);
4707 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
4708 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
4709 return bfd_reloc_continue;
4712 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4713 return bfd_reloc_continue;
4715 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4718 /* GD->LE relaxation:
4719 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
4721 bfd_putl32 (0xf2800000, contents + rel->r_offset);
4722 return bfd_reloc_continue;
4726 /* GD->IE relaxation:
4727 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
4729 insn = bfd_getl32 (contents + rel->r_offset);
4731 bfd_putl32 (insn, contents + rel->r_offset);
4732 return bfd_reloc_continue;
4735 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4738 /* GD->LE relaxation
4739 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
4740 bl __tls_get_addr => mrs x1, tpidr_el0
4741 nop => add x0, x1, x0
4744 /* First kill the tls_get_addr reloc on the bl instruction. */
4745 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
4746 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4748 bfd_putl32 (0xf2800000, contents + rel->r_offset);
4749 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
4750 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
4751 return bfd_reloc_continue;
4755 /* GD->IE relaxation
4756 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
4757 BL __tls_get_addr => mrs x1, tpidr_el0
4759 NOP => add x0, x1, x0
4762 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
4764 /* Remove the relocation on the BL instruction. */
4765 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4767 bfd_putl32 (0xf9400000, contents + rel->r_offset);
4769 /* We choose to fixup the BL and NOP instructions using the
4770 offset from the second relocation to allow flexibility in
4771 scheduling instructions between the ADD and BL. */
4772 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
4773 bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4);
4774 return bfd_reloc_continue;
4777 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4778 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4779 /* GD->IE/LE relaxation:
4780 add x0, x0, #:tlsdesc_lo12:var => nop
4783 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
4784 return bfd_reloc_ok;
4786 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4787 /* IE->LE relaxation:
4788 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
4792 insn = bfd_getl32 (contents + rel->r_offset);
4793 bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset);
4795 return bfd_reloc_continue;
4797 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4798 /* IE->LE relaxation:
4799 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
4803 insn = bfd_getl32 (contents + rel->r_offset);
4804 bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset);
4806 return bfd_reloc_continue;
4809 return bfd_reloc_continue;
4812 return bfd_reloc_ok;
4815 /* Relocate an AArch64 ELF section. */
4818 elfNN_aarch64_relocate_section (bfd *output_bfd,
4819 struct bfd_link_info *info,
4821 asection *input_section,
4823 Elf_Internal_Rela *relocs,
4824 Elf_Internal_Sym *local_syms,
4825 asection **local_sections)
4827 Elf_Internal_Shdr *symtab_hdr;
4828 struct elf_link_hash_entry **sym_hashes;
4829 Elf_Internal_Rela *rel;
4830 Elf_Internal_Rela *relend;
4832 struct elf_aarch64_link_hash_table *globals;
4833 bfd_boolean save_addend = FALSE;
4836 globals = elf_aarch64_hash_table (info);
4838 symtab_hdr = &elf_symtab_hdr (input_bfd);
4839 sym_hashes = elf_sym_hashes (input_bfd);
4842 relend = relocs + input_section->reloc_count;
4843 for (; rel < relend; rel++)
4845 unsigned int r_type;
4846 bfd_reloc_code_real_type bfd_r_type;
4847 bfd_reloc_code_real_type relaxed_bfd_r_type;
4848 reloc_howto_type *howto;
4849 unsigned long r_symndx;
4850 Elf_Internal_Sym *sym;
4852 struct elf_link_hash_entry *h;
4854 bfd_reloc_status_type r;
4857 bfd_boolean unresolved_reloc = FALSE;
4858 char *error_message = NULL;
4860 r_symndx = ELFNN_R_SYM (rel->r_info);
4861 r_type = ELFNN_R_TYPE (rel->r_info);
4863 bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type);
4864 howto = bfd_reloc.howto;
4868 (*_bfd_error_handler)
4869 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
4870 input_bfd, input_section, r_type);
4873 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
4879 if (r_symndx < symtab_hdr->sh_info)
4881 sym = local_syms + r_symndx;
4882 sym_type = ELFNN_ST_TYPE (sym->st_info);
4883 sec = local_sections[r_symndx];
4885 /* An object file might have a reference to a local
4886 undefined symbol. This is a daft object file, but we
4887 should at least do something about it. */
4888 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
4889 && bfd_is_und_section (sec)
4890 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
4892 if (!info->callbacks->undefined_symbol
4893 (info, bfd_elf_string_from_elf_section
4894 (input_bfd, symtab_hdr->sh_link, sym->st_name),
4895 input_bfd, input_section, rel->r_offset, TRUE))
4899 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4901 /* Relocate against local STT_GNU_IFUNC symbol. */
4902 if (!info->relocatable
4903 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4905 h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
4910 /* Set STT_GNU_IFUNC symbol value. */
4911 h->root.u.def.value = sym->st_value;
4912 h->root.u.def.section = sec;
4917 bfd_boolean warned, ignored;
4919 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4920 r_symndx, symtab_hdr, sym_hashes,
4922 unresolved_reloc, warned, ignored);
4927 if (sec != NULL && discarded_section (sec))
4928 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
4929 rel, 1, relend, howto, 0, contents);
4931 if (info->relocatable)
4935 name = h->root.root.string;
4938 name = (bfd_elf_string_from_elf_section
4939 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4940 if (name == NULL || *name == '\0')
4941 name = bfd_section_name (input_bfd, sec);
4945 && r_type != R_AARCH64_NONE
4946 && r_type != R_AARCH64_NULL
4948 || h->root.type == bfd_link_hash_defined
4949 || h->root.type == bfd_link_hash_defweak)
4950 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
4952 (*_bfd_error_handler)
4953 ((sym_type == STT_TLS
4954 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4955 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4957 input_section, (long) rel->r_offset, howto->name, name);
4960 /* We relax only if we can see that there can be a valid transition
4961 from a reloc type to another.
4962 We call elfNN_aarch64_final_link_relocate unless we're completely
4963 done, i.e., the relaxation produced the final output we want. */
4965 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
4967 if (relaxed_bfd_r_type != bfd_r_type)
4969 bfd_r_type = relaxed_bfd_r_type;
4970 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4971 BFD_ASSERT (howto != NULL);
4972 r_type = howto->type;
4973 r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
4974 unresolved_reloc = 0;
4977 r = bfd_reloc_continue;
4979 /* There may be multiple consecutive relocations for the
4980 same offset. In that case we are supposed to treat the
4981 output of each relocation as the addend for the next. */
4982 if (rel + 1 < relend
4983 && rel->r_offset == rel[1].r_offset
4984 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
4985 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
4988 save_addend = FALSE;
4990 if (r == bfd_reloc_continue)
4991 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
4992 input_section, contents, rel,
4993 relocation, info, sec,
4994 h, &unresolved_reloc,
4995 save_addend, &addend, sym);
4997 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
4999 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5000 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5001 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5002 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5004 bfd_boolean need_relocs = FALSE;
5009 off = symbol_got_offset (input_bfd, h, r_symndx);
5010 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5013 (info->shared || indx != 0) &&
5015 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5016 || h->root.type != bfd_link_hash_undefweak);
5018 BFD_ASSERT (globals->root.srelgot != NULL);
5022 Elf_Internal_Rela rela;
5023 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
5025 rela.r_offset = globals->root.sgot->output_section->vma +
5026 globals->root.sgot->output_offset + off;
5029 loc = globals->root.srelgot->contents;
5030 loc += globals->root.srelgot->reloc_count++
5031 * RELOC_SIZE (htab);
5032 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5036 bfd_put_NN (output_bfd,
5037 relocation - dtpoff_base (info),
5038 globals->root.sgot->contents + off
5043 /* This TLS symbol is global. We emit a
5044 relocation to fixup the tls offset at load
5047 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
5050 (globals->root.sgot->output_section->vma
5051 + globals->root.sgot->output_offset + off
5054 loc = globals->root.srelgot->contents;
5055 loc += globals->root.srelgot->reloc_count++
5056 * RELOC_SIZE (globals);
5057 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5058 bfd_put_NN (output_bfd, (bfd_vma) 0,
5059 globals->root.sgot->contents + off
5065 bfd_put_NN (output_bfd, (bfd_vma) 1,
5066 globals->root.sgot->contents + off);
5067 bfd_put_NN (output_bfd,
5068 relocation - dtpoff_base (info),
5069 globals->root.sgot->contents + off
5073 symbol_got_offset_mark (input_bfd, h, r_symndx);
5077 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5078 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
5079 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5080 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5082 bfd_boolean need_relocs = FALSE;
5087 off = symbol_got_offset (input_bfd, h, r_symndx);
5089 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5092 (info->shared || indx != 0) &&
5094 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5095 || h->root.type != bfd_link_hash_undefweak);
5097 BFD_ASSERT (globals->root.srelgot != NULL);
5101 Elf_Internal_Rela rela;
5104 rela.r_addend = relocation - dtpoff_base (info);
5108 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
5109 rela.r_offset = globals->root.sgot->output_section->vma +
5110 globals->root.sgot->output_offset + off;
5112 loc = globals->root.srelgot->contents;
5113 loc += globals->root.srelgot->reloc_count++
5114 * RELOC_SIZE (htab);
5116 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5118 bfd_put_NN (output_bfd, rela.r_addend,
5119 globals->root.sgot->contents + off);
5122 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
5123 globals->root.sgot->contents + off);
5125 symbol_got_offset_mark (input_bfd, h, r_symndx);
5129 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5130 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5131 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5132 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5133 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5134 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5135 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5136 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5139 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5140 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5141 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5142 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
5143 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5144 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
5146 bfd_boolean need_relocs = FALSE;
5147 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
5148 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
5150 need_relocs = (h == NULL
5151 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5152 || h->root.type != bfd_link_hash_undefweak);
5154 BFD_ASSERT (globals->root.srelgot != NULL);
5155 BFD_ASSERT (globals->root.sgot != NULL);
5160 Elf_Internal_Rela rela;
5161 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
5164 rela.r_offset = (globals->root.sgotplt->output_section->vma
5165 + globals->root.sgotplt->output_offset
5166 + off + globals->sgotplt_jump_table_size);
5169 rela.r_addend = relocation - dtpoff_base (info);
5171 /* Allocate the next available slot in the PLT reloc
5172 section to hold our R_AARCH64_TLSDESC, the next
5173 available slot is determined from reloc_count,
5174 which we step. But note, reloc_count was
5175 artifically moved down while allocating slots for
5176 real PLT relocs such that all of the PLT relocs
5177 will fit above the initial reloc_count and the
5178 extra stuff will fit below. */
5179 loc = globals->root.srelplt->contents;
5180 loc += globals->root.srelplt->reloc_count++
5181 * RELOC_SIZE (globals);
5183 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5185 bfd_put_NN (output_bfd, (bfd_vma) 0,
5186 globals->root.sgotplt->contents + off +
5187 globals->sgotplt_jump_table_size);
5188 bfd_put_NN (output_bfd, (bfd_vma) 0,
5189 globals->root.sgotplt->contents + off +
5190 globals->sgotplt_jump_table_size +
5194 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
5205 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5206 because such sections are not SEC_ALLOC and thus ld.so will
5207 not process them. */
5208 if (unresolved_reloc
5209 && !((input_section->flags & SEC_DEBUGGING) != 0
5211 && _bfd_elf_section_offset (output_bfd, info, input_section,
5212 +rel->r_offset) != (bfd_vma) - 1)
5214 (*_bfd_error_handler)
5216 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5217 input_bfd, input_section, (long) rel->r_offset, howto->name,
5218 h->root.root.string);
5222 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
5226 case bfd_reloc_overflow:
5227 /* If the overflowing reloc was to an undefined symbol,
5228 we have already printed one error message and there
5229 is no point complaining again. */
5231 h->root.type != bfd_link_hash_undefined)
5232 && (!((*info->callbacks->reloc_overflow)
5233 (info, (h ? &h->root : NULL), name, howto->name,
5234 (bfd_vma) 0, input_bfd, input_section,
5239 case bfd_reloc_undefined:
5240 if (!((*info->callbacks->undefined_symbol)
5241 (info, name, input_bfd, input_section,
5242 rel->r_offset, TRUE)))
5246 case bfd_reloc_outofrange:
5247 error_message = _("out of range");
5250 case bfd_reloc_notsupported:
5251 error_message = _("unsupported relocation");
5254 case bfd_reloc_dangerous:
5255 /* error_message should already be set. */
5259 error_message = _("unknown error");
5263 BFD_ASSERT (error_message != NULL);
5264 if (!((*info->callbacks->reloc_dangerous)
5265 (info, error_message, input_bfd, input_section,
5276 /* Set the right machine number. */
5279 elfNN_aarch64_object_p (bfd *abfd)
5282 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
5284 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
5289 /* Function to keep AArch64 specific flags in the ELF header. */
5292 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
5294 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
5299 elf_elfheader (abfd)->e_flags = flags;
5300 elf_flags_init (abfd) = TRUE;
5306 /* Merge backend specific data from an object file to the output
5307 object file when linking. */
5310 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5314 bfd_boolean flags_compatible = TRUE;
5317 /* Check if we have the same endianess. */
5318 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5321 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
5324 /* The input BFD must have had its flags initialised. */
5325 /* The following seems bogus to me -- The flags are initialized in
5326 the assembler but I don't think an elf_flags_init field is
5327 written into the object. */
5328 /* BFD_ASSERT (elf_flags_init (ibfd)); */
5330 in_flags = elf_elfheader (ibfd)->e_flags;
5331 out_flags = elf_elfheader (obfd)->e_flags;
5333 if (!elf_flags_init (obfd))
5335 /* If the input is the default architecture and had the default
5336 flags then do not bother setting the flags for the output
5337 architecture, instead allow future merges to do this. If no
5338 future merges ever set these flags then they will retain their
5339 uninitialised values, which surprise surprise, correspond
5340 to the default values. */
5341 if (bfd_get_arch_info (ibfd)->the_default
5342 && elf_elfheader (ibfd)->e_flags == 0)
5345 elf_flags_init (obfd) = TRUE;
5346 elf_elfheader (obfd)->e_flags = in_flags;
5348 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
5349 && bfd_get_arch_info (obfd)->the_default)
5350 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
5351 bfd_get_mach (ibfd));
5356 /* Identical flags must be compatible. */
5357 if (in_flags == out_flags)
5360 /* Check to see if the input BFD actually contains any sections. If
5361 not, its flags may not have been initialised either, but it
5362 cannot actually cause any incompatiblity. Do not short-circuit
5363 dynamic objects; their section list may be emptied by
5364 elf_link_add_object_symbols.
5366 Also check to see if there are no code sections in the input.
5367 In this case there is no need to check for code specific flags.
5368 XXX - do we need to worry about floating-point format compatability
5369 in data sections ? */
5370 if (!(ibfd->flags & DYNAMIC))
5372 bfd_boolean null_input_bfd = TRUE;
5373 bfd_boolean only_data_sections = TRUE;
5375 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5377 if ((bfd_get_section_flags (ibfd, sec)
5378 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5379 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5380 only_data_sections = FALSE;
5382 null_input_bfd = FALSE;
5386 if (null_input_bfd || only_data_sections)
5390 return flags_compatible;
5393 /* Display the flags field. */
5396 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
5398 FILE *file = (FILE *) ptr;
5399 unsigned long flags;
5401 BFD_ASSERT (abfd != NULL && ptr != NULL);
5403 /* Print normal ELF private data. */
5404 _bfd_elf_print_private_bfd_data (abfd, ptr);
5406 flags = elf_elfheader (abfd)->e_flags;
5407 /* Ignore init flag - it may not be set, despite the flags field
5408 containing valid data. */
5410 /* xgettext:c-format */
5411 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5414 fprintf (file, _("<Unrecognised flag bits set>"));
5421 /* Update the got entry reference counts for the section being removed. */
5424 elfNN_aarch64_gc_sweep_hook (bfd *abfd,
5425 struct bfd_link_info *info,
5427 const Elf_Internal_Rela * relocs)
5429 struct elf_aarch64_link_hash_table *htab;
5430 Elf_Internal_Shdr *symtab_hdr;
5431 struct elf_link_hash_entry **sym_hashes;
5432 struct elf_aarch64_local_symbol *locals;
5433 const Elf_Internal_Rela *rel, *relend;
5435 if (info->relocatable)
5438 htab = elf_aarch64_hash_table (info);
5443 elf_section_data (sec)->local_dynrel = NULL;
5445 symtab_hdr = &elf_symtab_hdr (abfd);
5446 sym_hashes = elf_sym_hashes (abfd);
5448 locals = elf_aarch64_locals (abfd);
5450 relend = relocs + sec->reloc_count;
5451 for (rel = relocs; rel < relend; rel++)
5453 unsigned long r_symndx;
5454 unsigned int r_type;
5455 struct elf_link_hash_entry *h = NULL;
5457 r_symndx = ELFNN_R_SYM (rel->r_info);
5459 if (r_symndx >= symtab_hdr->sh_info)
5462 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5463 while (h->root.type == bfd_link_hash_indirect
5464 || h->root.type == bfd_link_hash_warning)
5465 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5469 Elf_Internal_Sym *isym;
5471 /* A local symbol. */
5472 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5475 /* Check relocation against local STT_GNU_IFUNC symbol. */
5477 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5479 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE);
5487 struct elf_aarch64_link_hash_entry *eh;
5488 struct elf_dyn_relocs **pp;
5489 struct elf_dyn_relocs *p;
5491 eh = (struct elf_aarch64_link_hash_entry *) h;
5493 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5496 /* Everything must go for SEC. */
5502 r_type = ELFNN_R_TYPE (rel->r_info);
5503 switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx))
5505 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5506 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5507 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5508 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5509 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5510 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5511 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5512 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5513 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5514 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5515 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5516 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5517 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5518 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5519 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5520 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5521 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5522 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5523 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5524 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5525 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5526 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5527 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5528 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5529 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5532 if (h->got.refcount > 0)
5533 h->got.refcount -= 1;
5535 if (h->type == STT_GNU_IFUNC)
5537 if (h->plt.refcount > 0)
5538 h->plt.refcount -= 1;
5541 else if (locals != NULL)
5543 if (locals[r_symndx].got_refcount > 0)
5544 locals[r_symndx].got_refcount -= 1;
5548 case BFD_RELOC_AARCH64_CALL26:
5549 case BFD_RELOC_AARCH64_JUMP26:
5550 /* If this is a local symbol then we resolve it
5551 directly without creating a PLT entry. */
5555 if (h->plt.refcount > 0)
5556 h->plt.refcount -= 1;
5559 case BFD_RELOC_AARCH64_MOVW_G0_NC:
5560 case BFD_RELOC_AARCH64_MOVW_G1_NC:
5561 case BFD_RELOC_AARCH64_MOVW_G2_NC:
5562 case BFD_RELOC_AARCH64_MOVW_G3:
5563 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
5564 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5565 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
5566 case BFD_RELOC_AARCH64_NN:
5567 if (h != NULL && info->executable)
5569 if (h->plt.refcount > 0)
5570 h->plt.refcount -= 1;
5582 /* Adjust a symbol defined by a dynamic object and referenced by a
5583 regular object. The current definition is in some section of the
5584 dynamic object, but we're not including those sections. We have to
5585 change the definition to something the rest of the link can
5589 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
5590 struct elf_link_hash_entry *h)
5592 struct elf_aarch64_link_hash_table *htab;
5595 /* If this is a function, put it in the procedure linkage table. We
5596 will fill in the contents of the procedure linkage table later,
5597 when we know the address of the .got section. */
5598 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
5600 if (h->plt.refcount <= 0
5601 || (h->type != STT_GNU_IFUNC
5602 && (SYMBOL_CALLS_LOCAL (info, h)
5603 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5604 && h->root.type == bfd_link_hash_undefweak))))
5606 /* This case can occur if we saw a CALL26 reloc in
5607 an input file, but the symbol wasn't referred to
5608 by a dynamic object or all references were
5609 garbage collected. In which case we can end up
5611 h->plt.offset = (bfd_vma) - 1;
5618 /* It's possible that we incorrectly decided a .plt reloc was
5619 needed for an R_X86_64_PC32 reloc to a non-function sym in
5620 check_relocs. We can't decide accurately between function and
5621 non-function syms in check-relocs; Objects loaded later in
5622 the link may change h->type. So fix it now. */
5623 h->plt.offset = (bfd_vma) - 1;
5626 /* If this is a weak symbol, and there is a real definition, the
5627 processor independent code will have arranged for us to see the
5628 real definition first, and we can just use the same value. */
5629 if (h->u.weakdef != NULL)
5631 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5632 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5633 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5634 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5635 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
5636 h->non_got_ref = h->u.weakdef->non_got_ref;
5640 /* If we are creating a shared library, we must presume that the
5641 only references to the symbol are via the global offset table.
5642 For such cases we need not do anything here; the relocations will
5643 be handled correctly by relocate_section. */
5647 /* If there are no references to this symbol that do not use the
5648 GOT, we don't need to generate a copy reloc. */
5649 if (!h->non_got_ref)
5652 /* If -z nocopyreloc was given, we won't generate them either. */
5653 if (info->nocopyreloc)
5659 /* We must allocate the symbol in our .dynbss section, which will
5660 become part of the .bss section of the executable. There will be
5661 an entry for this symbol in the .dynsym section. The dynamic
5662 object will contain position independent code, so all references
5663 from the dynamic object to this symbol will go through the global
5664 offset table. The dynamic linker will use the .dynsym entry to
5665 determine the address it must put in the global offset table, so
5666 both the dynamic object and the regular object will refer to the
5667 same memory location for the variable. */
5669 htab = elf_aarch64_hash_table (info);
5671 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
5672 to copy the initial value out of the dynamic object and into the
5673 runtime process image. */
5674 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5676 htab->srelbss->size += RELOC_SIZE (htab);
5682 return _bfd_elf_adjust_dynamic_copy (info, h, s);
5687 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
5689 struct elf_aarch64_local_symbol *locals;
5690 locals = elf_aarch64_locals (abfd);
5693 locals = (struct elf_aarch64_local_symbol *)
5694 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
5697 elf_aarch64_locals (abfd) = locals;
5702 /* Create the .got section to hold the global offset table. */
5705 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
5707 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5710 struct elf_link_hash_entry *h;
5711 struct elf_link_hash_table *htab = elf_hash_table (info);
5713 /* This function may be called more than once. */
5714 s = bfd_get_linker_section (abfd, ".got");
5718 flags = bed->dynamic_sec_flags;
5720 s = bfd_make_section_anyway_with_flags (abfd,
5721 (bed->rela_plts_and_copies_p
5722 ? ".rela.got" : ".rel.got"),
5723 (bed->dynamic_sec_flags
5726 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
5730 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
5732 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
5735 htab->sgot->size += GOT_ENTRY_SIZE;
5737 if (bed->want_got_sym)
5739 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
5740 (or .got.plt) section. We don't do this in the linker script
5741 because we don't want to define the symbol if we are not creating
5742 a global offset table. */
5743 h = _bfd_elf_define_linkage_sym (abfd, info, s,
5744 "_GLOBAL_OFFSET_TABLE_");
5745 elf_hash_table (info)->hgot = h;
5750 if (bed->want_got_plt)
5752 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
5754 || !bfd_set_section_alignment (abfd, s,
5755 bed->s->log_file_align))
5760 /* The first bit of the global offset table is the header. */
5761 s->size += bed->got_header_size;
5766 /* Look through the relocs for a section during the first phase. */
5769 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
5770 asection *sec, const Elf_Internal_Rela *relocs)
5772 Elf_Internal_Shdr *symtab_hdr;
5773 struct elf_link_hash_entry **sym_hashes;
5774 const Elf_Internal_Rela *rel;
5775 const Elf_Internal_Rela *rel_end;
5778 struct elf_aarch64_link_hash_table *htab;
5780 if (info->relocatable)
5783 BFD_ASSERT (is_aarch64_elf (abfd));
5785 htab = elf_aarch64_hash_table (info);
5788 symtab_hdr = &elf_symtab_hdr (abfd);
5789 sym_hashes = elf_sym_hashes (abfd);
5791 rel_end = relocs + sec->reloc_count;
5792 for (rel = relocs; rel < rel_end; rel++)
5794 struct elf_link_hash_entry *h;
5795 unsigned long r_symndx;
5796 unsigned int r_type;
5797 bfd_reloc_code_real_type bfd_r_type;
5798 Elf_Internal_Sym *isym;
5800 r_symndx = ELFNN_R_SYM (rel->r_info);
5801 r_type = ELFNN_R_TYPE (rel->r_info);
5803 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
5805 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
5810 if (r_symndx < symtab_hdr->sh_info)
5812 /* A local symbol. */
5813 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5818 /* Check relocation against local STT_GNU_IFUNC symbol. */
5819 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5821 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
5826 /* Fake a STT_GNU_IFUNC symbol. */
5827 h->type = STT_GNU_IFUNC;
5830 h->forced_local = 1;
5831 h->root.type = bfd_link_hash_defined;
5838 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5839 while (h->root.type == bfd_link_hash_indirect
5840 || h->root.type == bfd_link_hash_warning)
5841 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5843 /* PR15323, ref flags aren't set for references in the same
5845 h->root.non_ir_ref = 1;
5848 /* Could be done earlier, if h were already available. */
5849 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
5853 /* Create the ifunc sections for static executables. If we
5854 never see an indirect function symbol nor we are building
5855 a static executable, those sections will be empty and
5856 won't appear in output. */
5862 case BFD_RELOC_AARCH64_NN:
5863 case BFD_RELOC_AARCH64_CALL26:
5864 case BFD_RELOC_AARCH64_JUMP26:
5865 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5866 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5867 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5868 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5869 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5870 case BFD_RELOC_AARCH64_ADD_LO12:
5871 if (htab->root.dynobj == NULL)
5872 htab->root.dynobj = abfd;
5873 if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
5878 /* It is referenced by a non-shared object. */
5880 h->root.non_ir_ref = 1;
5885 case BFD_RELOC_AARCH64_NN:
5887 /* We don't need to handle relocs into sections not going into
5888 the "real" output. */
5889 if ((sec->flags & SEC_ALLOC) == 0)
5897 h->plt.refcount += 1;
5898 h->pointer_equality_needed = 1;
5901 /* No need to do anything if we're not creating a shared
5907 struct elf_dyn_relocs *p;
5908 struct elf_dyn_relocs **head;
5910 /* We must copy these reloc types into the output file.
5911 Create a reloc section in dynobj and make room for
5915 if (htab->root.dynobj == NULL)
5916 htab->root.dynobj = abfd;
5918 sreloc = _bfd_elf_make_dynamic_reloc_section
5919 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
5925 /* If this is a global symbol, we count the number of
5926 relocations we need for this symbol. */
5929 struct elf_aarch64_link_hash_entry *eh;
5930 eh = (struct elf_aarch64_link_hash_entry *) h;
5931 head = &eh->dyn_relocs;
5935 /* Track dynamic relocs needed for local syms too.
5936 We really need local syms available to do this
5942 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5947 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5951 /* Beware of type punned pointers vs strict aliasing
5953 vpp = &(elf_section_data (s)->local_dynrel);
5954 head = (struct elf_dyn_relocs **) vpp;
5958 if (p == NULL || p->sec != sec)
5960 bfd_size_type amt = sizeof *p;
5961 p = ((struct elf_dyn_relocs *)
5962 bfd_zalloc (htab->root.dynobj, amt));
5975 /* RR: We probably want to keep a consistency check that
5976 there are no dangling GOT_PAGE relocs. */
5977 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5978 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5979 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5980 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5981 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5982 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5983 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5984 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5985 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5986 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5987 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5988 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5989 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5990 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5991 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5992 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5993 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5994 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5995 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5996 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5997 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5998 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5999 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
6000 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
6001 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
6004 unsigned old_got_type;
6006 got_type = aarch64_reloc_got_type (bfd_r_type);
6010 h->got.refcount += 1;
6011 old_got_type = elf_aarch64_hash_entry (h)->got_type;
6015 struct elf_aarch64_local_symbol *locals;
6017 if (!elfNN_aarch64_allocate_local_symbols
6018 (abfd, symtab_hdr->sh_info))
6021 locals = elf_aarch64_locals (abfd);
6022 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
6023 locals[r_symndx].got_refcount += 1;
6024 old_got_type = locals[r_symndx].got_type;
6027 /* If a variable is accessed with both general dynamic TLS
6028 methods, two slots may be created. */
6029 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
6030 got_type |= old_got_type;
6032 /* We will already have issued an error message if there
6033 is a TLS/non-TLS mismatch, based on the symbol type.
6034 So just combine any TLS types needed. */
6035 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
6036 && got_type != GOT_NORMAL)
6037 got_type |= old_got_type;
6039 /* If the symbol is accessed by both IE and GD methods, we
6040 are able to relax. Turn off the GD flag, without
6041 messing up with any other kind of TLS types that may be
6043 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
6044 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
6046 if (old_got_type != got_type)
6049 elf_aarch64_hash_entry (h)->got_type = got_type;
6052 struct elf_aarch64_local_symbol *locals;
6053 locals = elf_aarch64_locals (abfd);
6054 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
6055 locals[r_symndx].got_type = got_type;
6059 if (htab->root.dynobj == NULL)
6060 htab->root.dynobj = abfd;
6061 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
6066 case BFD_RELOC_AARCH64_MOVW_G0_NC:
6067 case BFD_RELOC_AARCH64_MOVW_G1_NC:
6068 case BFD_RELOC_AARCH64_MOVW_G2_NC:
6069 case BFD_RELOC_AARCH64_MOVW_G3:
6072 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
6073 (*_bfd_error_handler)
6074 (_("%B: relocation %s against `%s' can not be used when making "
6075 "a shared object; recompile with -fPIC"),
6076 abfd, elfNN_aarch64_howto_table[howto_index].name,
6077 (h) ? h->root.root.string : "a local symbol");
6078 bfd_set_error (bfd_error_bad_value);
6082 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
6083 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
6084 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
6085 if (h != NULL && info->executable)
6087 /* If this reloc is in a read-only section, we might
6088 need a copy reloc. We can't check reliably at this
6089 stage whether the section is read-only, as input
6090 sections have not yet been mapped to output sections.
6091 Tentatively set the flag for now, and correct in
6092 adjust_dynamic_symbol. */
6094 h->plt.refcount += 1;
6095 h->pointer_equality_needed = 1;
6097 /* FIXME:: RR need to handle these in shared libraries
6098 and essentially bomb out as these being non-PIC
6099 relocations in shared libraries. */
6102 case BFD_RELOC_AARCH64_CALL26:
6103 case BFD_RELOC_AARCH64_JUMP26:
6104 /* If this is a local symbol then we resolve it
6105 directly without creating a PLT entry. */
6110 if (h->plt.refcount <= 0)
6111 h->plt.refcount = 1;
6113 h->plt.refcount += 1;
6124 /* Treat mapping symbols as special target symbols. */
6127 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
6130 return bfd_is_aarch64_special_symbol_name (sym->name,
6131 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
6134 /* This is a copy of elf_find_function () from elf.c except that
6135 AArch64 mapping symbols are ignored when looking for function names. */
6138 aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6142 const char **filename_ptr,
6143 const char **functionname_ptr)
6145 const char *filename = NULL;
6146 asymbol *func = NULL;
6147 bfd_vma low_func = 0;
6150 for (p = symbols; *p != NULL; p++)
6154 q = (elf_symbol_type *) * p;
6156 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6161 filename = bfd_asymbol_name (&q->symbol);
6165 /* Skip mapping symbols. */
6166 if ((q->symbol.flags & BSF_LOCAL)
6167 && (bfd_is_aarch64_special_symbol_name
6168 (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
6171 if (bfd_get_section (&q->symbol) == section
6172 && q->symbol.value >= low_func && q->symbol.value <= offset)
6174 func = (asymbol *) q;
6175 low_func = q->symbol.value;
6185 *filename_ptr = filename;
6186 if (functionname_ptr)
6187 *functionname_ptr = bfd_asymbol_name (func);
6193 /* Find the nearest line to a particular section and offset, for error
6194 reporting. This code is a duplicate of the code in elf.c, except
6195 that it uses aarch64_elf_find_function. */
6198 elfNN_aarch64_find_nearest_line (bfd *abfd,
6202 const char **filename_ptr,
6203 const char **functionname_ptr,
6204 unsigned int *line_ptr,
6205 unsigned int *discriminator_ptr)
6207 bfd_boolean found = FALSE;
6209 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
6210 filename_ptr, functionname_ptr,
6211 line_ptr, discriminator_ptr,
6212 dwarf_debug_sections, 0,
6213 &elf_tdata (abfd)->dwarf2_find_line_info))
6215 if (!*functionname_ptr)
6216 aarch64_elf_find_function (abfd, symbols, section, offset,
6217 *filename_ptr ? NULL : filename_ptr,
6223 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
6224 toolchain uses DWARF1. */
6226 if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6227 &found, filename_ptr,
6228 functionname_ptr, line_ptr,
6229 &elf_tdata (abfd)->line_info))
6232 if (found && (*functionname_ptr || *line_ptr))
6235 if (symbols == NULL)
6238 if (!aarch64_elf_find_function (abfd, symbols, section, offset,
6239 filename_ptr, functionname_ptr))
6247 elfNN_aarch64_find_inliner_info (bfd *abfd,
6248 const char **filename_ptr,
6249 const char **functionname_ptr,
6250 unsigned int *line_ptr)
6253 found = _bfd_dwarf2_find_inliner_info
6254 (abfd, filename_ptr,
6255 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
6261 elfNN_aarch64_post_process_headers (bfd *abfd,
6262 struct bfd_link_info *link_info)
6264 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
6266 i_ehdrp = elf_elfheader (abfd);
6267 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
6269 _bfd_elf_post_process_headers (abfd, link_info);
6272 static enum elf_reloc_type_class
6273 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
6274 const asection *rel_sec ATTRIBUTE_UNUSED,
6275 const Elf_Internal_Rela *rela)
6277 switch ((int) ELFNN_R_TYPE (rela->r_info))
6279 case AARCH64_R (RELATIVE):
6280 return reloc_class_relative;
6281 case AARCH64_R (JUMP_SLOT):
6282 return reloc_class_plt;
6283 case AARCH64_R (COPY):
6284 return reloc_class_copy;
6286 return reloc_class_normal;
6290 /* Handle an AArch64 specific section when reading an object file. This is
6291 called when bfd_section_from_shdr finds a section with an unknown
6295 elfNN_aarch64_section_from_shdr (bfd *abfd,
6296 Elf_Internal_Shdr *hdr,
6297 const char *name, int shindex)
6299 /* There ought to be a place to keep ELF backend specific flags, but
6300 at the moment there isn't one. We just keep track of the
6301 sections by their name, instead. Fortunately, the ABI gives
6302 names for all the AArch64 specific sections, so we will probably get
6304 switch (hdr->sh_type)
6306 case SHT_AARCH64_ATTRIBUTES:
6313 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6319 /* A structure used to record a list of sections, independently
6320 of the next and prev fields in the asection structure. */
6321 typedef struct section_list
6324 struct section_list *next;
6325 struct section_list *prev;
6329 /* Unfortunately we need to keep a list of sections for which
6330 an _aarch64_elf_section_data structure has been allocated. This
6331 is because it is possible for functions like elfNN_aarch64_write_section
6332 to be called on a section which has had an elf_data_structure
6333 allocated for it (and so the used_by_bfd field is valid) but
6334 for which the AArch64 extended version of this structure - the
6335 _aarch64_elf_section_data structure - has not been allocated. */
6336 static section_list *sections_with_aarch64_elf_section_data = NULL;
6339 record_section_with_aarch64_elf_section_data (asection *sec)
6341 struct section_list *entry;
6343 entry = bfd_malloc (sizeof (*entry));
6347 entry->next = sections_with_aarch64_elf_section_data;
6349 if (entry->next != NULL)
6350 entry->next->prev = entry;
6351 sections_with_aarch64_elf_section_data = entry;
6354 static struct section_list *
6355 find_aarch64_elf_section_entry (asection *sec)
6357 struct section_list *entry;
6358 static struct section_list *last_entry = NULL;
6360 /* This is a short cut for the typical case where the sections are added
6361 to the sections_with_aarch64_elf_section_data list in forward order and
6362 then looked up here in backwards order. This makes a real difference
6363 to the ld-srec/sec64k.exp linker test. */
6364 entry = sections_with_aarch64_elf_section_data;
6365 if (last_entry != NULL)
6367 if (last_entry->sec == sec)
6369 else if (last_entry->next != NULL && last_entry->next->sec == sec)
6370 entry = last_entry->next;
6373 for (; entry; entry = entry->next)
6374 if (entry->sec == sec)
6378 /* Record the entry prior to this one - it is the entry we are
6379 most likely to want to locate next time. Also this way if we
6380 have been called from
6381 unrecord_section_with_aarch64_elf_section_data () we will not
6382 be caching a pointer that is about to be freed. */
6383 last_entry = entry->prev;
6389 unrecord_section_with_aarch64_elf_section_data (asection *sec)
6391 struct section_list *entry;
6393 entry = find_aarch64_elf_section_entry (sec);
6397 if (entry->prev != NULL)
6398 entry->prev->next = entry->next;
6399 if (entry->next != NULL)
6400 entry->next->prev = entry->prev;
6401 if (entry == sections_with_aarch64_elf_section_data)
6402 sections_with_aarch64_elf_section_data = entry->next;
6411 struct bfd_link_info *info;
6414 int (*func) (void *, const char *, Elf_Internal_Sym *,
6415 asection *, struct elf_link_hash_entry *);
6416 } output_arch_syminfo;
6418 enum map_symbol_type
6425 /* Output a single mapping symbol. */
6428 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
6429 enum map_symbol_type type, bfd_vma offset)
6431 static const char *names[2] = { "$x", "$d" };
6432 Elf_Internal_Sym sym;
6434 sym.st_value = (osi->sec->output_section->vma
6435 + osi->sec->output_offset + offset);
6438 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
6439 sym.st_shndx = osi->sec_shndx;
6440 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
6445 /* Output mapping symbols for PLT entries associated with H. */
6448 elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf)
6450 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
6453 if (h->root.type == bfd_link_hash_indirect)
6456 if (h->root.type == bfd_link_hash_warning)
6457 /* When warning symbols are created, they **replace** the "real"
6458 entry in the hash table, thus we never get to see the real
6459 symbol in a hash traversal. So look at it now. */
6460 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6462 if (h->plt.offset == (bfd_vma) - 1)
6465 addr = h->plt.offset;
6468 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6475 /* Output a single local symbol for a generated stub. */
6478 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
6479 bfd_vma offset, bfd_vma size)
6481 Elf_Internal_Sym sym;
6483 sym.st_value = (osi->sec->output_section->vma
6484 + osi->sec->output_offset + offset);
6487 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6488 sym.st_shndx = osi->sec_shndx;
6489 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
6493 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6495 struct elf_aarch64_stub_hash_entry *stub_entry;
6499 output_arch_syminfo *osi;
6501 /* Massage our args to the form they really have. */
6502 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
6503 osi = (output_arch_syminfo *) in_arg;
6505 stub_sec = stub_entry->stub_sec;
6507 /* Ensure this stub is attached to the current section being
6509 if (stub_sec != osi->sec)
6512 addr = (bfd_vma) stub_entry->stub_offset;
6514 stub_name = stub_entry->output_name;
6516 switch (stub_entry->stub_type)
6518 case aarch64_stub_adrp_branch:
6519 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
6520 sizeof (aarch64_adrp_branch_stub)))
6522 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6525 case aarch64_stub_long_branch:
6526 if (!elfNN_aarch64_output_stub_sym
6527 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
6529 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6531 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
6534 case aarch64_stub_erratum_835769_veneer:
6535 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
6536 sizeof (aarch64_erratum_835769_stub)))
6538 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6548 /* Output mapping symbols for linker generated sections. */
6551 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
6552 struct bfd_link_info *info,
6554 int (*func) (void *, const char *,
6557 struct elf_link_hash_entry
6560 output_arch_syminfo osi;
6561 struct elf_aarch64_link_hash_table *htab;
6563 htab = elf_aarch64_hash_table (info);
6569 /* Long calls stubs. */
6570 if (htab->stub_bfd && htab->stub_bfd->sections)
6574 for (stub_sec = htab->stub_bfd->sections;
6575 stub_sec != NULL; stub_sec = stub_sec->next)
6577 /* Ignore non-stub sections. */
6578 if (!strstr (stub_sec->name, STUB_SUFFIX))
6583 osi.sec_shndx = _bfd_elf_section_from_bfd_section
6584 (output_bfd, osi.sec->output_section);
6586 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
6591 /* Finally, output mapping symbols for the PLT. */
6592 if (!htab->root.splt || htab->root.splt->size == 0)
6595 /* For now live without mapping symbols for the plt. */
6596 osi.sec_shndx = _bfd_elf_section_from_bfd_section
6597 (output_bfd, htab->root.splt->output_section);
6598 osi.sec = htab->root.splt;
6600 elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map,
6607 /* Allocate target specific section data. */
6610 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
6612 if (!sec->used_by_bfd)
6614 _aarch64_elf_section_data *sdata;
6615 bfd_size_type amt = sizeof (*sdata);
6617 sdata = bfd_zalloc (abfd, amt);
6620 sec->used_by_bfd = sdata;
6623 record_section_with_aarch64_elf_section_data (sec);
6625 return _bfd_elf_new_section_hook (abfd, sec);
6630 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
6632 void *ignore ATTRIBUTE_UNUSED)
6634 unrecord_section_with_aarch64_elf_section_data (sec);
6638 elfNN_aarch64_close_and_cleanup (bfd *abfd)
6641 bfd_map_over_sections (abfd,
6642 unrecord_section_via_map_over_sections, NULL);
6644 return _bfd_elf_close_and_cleanup (abfd);
6648 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
6651 bfd_map_over_sections (abfd,
6652 unrecord_section_via_map_over_sections, NULL);
6654 return _bfd_free_cached_info (abfd);
6657 /* Create dynamic sections. This is different from the ARM backend in that
6658 the got, plt, gotplt and their relocation sections are all created in the
6659 standard part of the bfd elf backend. */
6662 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
6663 struct bfd_link_info *info)
6665 struct elf_aarch64_link_hash_table *htab;
6667 /* We need to create .got section. */
6668 if (!aarch64_elf_create_got_section (dynobj, info))
6671 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
6674 htab = elf_aarch64_hash_table (info);
6675 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
6677 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
6679 if (!htab->sdynbss || (!info->shared && !htab->srelbss))
6686 /* Allocate space in .plt, .got and associated reloc sections for
6690 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6692 struct bfd_link_info *info;
6693 struct elf_aarch64_link_hash_table *htab;
6694 struct elf_aarch64_link_hash_entry *eh;
6695 struct elf_dyn_relocs *p;
6697 /* An example of a bfd_link_hash_indirect symbol is versioned
6698 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
6699 -> __gxx_personality_v0(bfd_link_hash_defined)
6701 There is no need to process bfd_link_hash_indirect symbols here
6702 because we will also be presented with the concrete instance of
6703 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
6704 called to copy all relevant data from the generic to the concrete
6707 if (h->root.type == bfd_link_hash_indirect)
6710 if (h->root.type == bfd_link_hash_warning)
6711 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6713 info = (struct bfd_link_info *) inf;
6714 htab = elf_aarch64_hash_table (info);
6716 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
6717 here if it is defined and referenced in a non-shared object. */
6718 if (h->type == STT_GNU_IFUNC
6721 else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
6723 /* Make sure this symbol is output as a dynamic symbol.
6724 Undefined weak syms won't yet be marked as dynamic. */
6725 if (h->dynindx == -1 && !h->forced_local)
6727 if (!bfd_elf_link_record_dynamic_symbol (info, h))
6731 if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
6733 asection *s = htab->root.splt;
6735 /* If this is the first .plt entry, make room for the special
6738 s->size += htab->plt_header_size;
6740 h->plt.offset = s->size;
6742 /* If this symbol is not defined in a regular file, and we are
6743 not generating a shared library, then set the symbol to this
6744 location in the .plt. This is required to make function
6745 pointers compare as equal between the normal executable and
6746 the shared library. */
6747 if (!info->shared && !h->def_regular)
6749 h->root.u.def.section = s;
6750 h->root.u.def.value = h->plt.offset;
6753 /* Make room for this entry. For now we only create the
6754 small model PLT entries. We later need to find a way
6755 of relaxing into these from the large model PLT entries. */
6756 s->size += PLT_SMALL_ENTRY_SIZE;
6758 /* We also need to make an entry in the .got.plt section, which
6759 will be placed in the .got section by the linker script. */
6760 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
6762 /* We also need to make an entry in the .rela.plt section. */
6763 htab->root.srelplt->size += RELOC_SIZE (htab);
6765 /* We need to ensure that all GOT entries that serve the PLT
6766 are consecutive with the special GOT slots [0] [1] and
6767 [2]. Any addtional relocations, such as
6768 R_AARCH64_TLSDESC, must be placed after the PLT related
6769 entries. We abuse the reloc_count such that during
6770 sizing we adjust reloc_count to indicate the number of
6771 PLT related reserved entries. In subsequent phases when
6772 filling in the contents of the reloc entries, PLT related
6773 entries are placed by computing their PLT index (0
6774 .. reloc_count). While other none PLT relocs are placed
6775 at the slot indicated by reloc_count and reloc_count is
6778 htab->root.srelplt->reloc_count++;
6782 h->plt.offset = (bfd_vma) - 1;
6788 h->plt.offset = (bfd_vma) - 1;
6792 eh = (struct elf_aarch64_link_hash_entry *) h;
6793 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
6795 if (h->got.refcount > 0)
6798 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
6800 h->got.offset = (bfd_vma) - 1;
6802 dyn = htab->root.dynamic_sections_created;
6804 /* Make sure this symbol is output as a dynamic symbol.
6805 Undefined weak syms won't yet be marked as dynamic. */
6806 if (dyn && h->dynindx == -1 && !h->forced_local)
6808 if (!bfd_elf_link_record_dynamic_symbol (info, h))
6812 if (got_type == GOT_UNKNOWN)
6815 else if (got_type == GOT_NORMAL)
6817 h->got.offset = htab->root.sgot->size;
6818 htab->root.sgot->size += GOT_ENTRY_SIZE;
6819 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6820 || h->root.type != bfd_link_hash_undefweak)
6822 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6824 htab->root.srelgot->size += RELOC_SIZE (htab);
6830 if (got_type & GOT_TLSDESC_GD)
6832 eh->tlsdesc_got_jump_table_offset =
6833 (htab->root.sgotplt->size
6834 - aarch64_compute_jump_table_size (htab));
6835 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
6836 h->got.offset = (bfd_vma) - 2;
6839 if (got_type & GOT_TLS_GD)
6841 h->got.offset = htab->root.sgot->size;
6842 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
6845 if (got_type & GOT_TLS_IE)
6847 h->got.offset = htab->root.sgot->size;
6848 htab->root.sgot->size += GOT_ENTRY_SIZE;
6851 indx = h && h->dynindx != -1 ? h->dynindx : 0;
6852 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6853 || h->root.type != bfd_link_hash_undefweak)
6856 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6858 if (got_type & GOT_TLSDESC_GD)
6860 htab->root.srelplt->size += RELOC_SIZE (htab);
6861 /* Note reloc_count not incremented here! We have
6862 already adjusted reloc_count for this relocation
6865 /* TLSDESC PLT is now needed, but not yet determined. */
6866 htab->tlsdesc_plt = (bfd_vma) - 1;
6869 if (got_type & GOT_TLS_GD)
6870 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
6872 if (got_type & GOT_TLS_IE)
6873 htab->root.srelgot->size += RELOC_SIZE (htab);
6879 h->got.offset = (bfd_vma) - 1;
6882 if (eh->dyn_relocs == NULL)
6885 /* In the shared -Bsymbolic case, discard space allocated for
6886 dynamic pc-relative relocs against symbols which turn out to be
6887 defined in regular objects. For the normal shared case, discard
6888 space for pc-relative relocs that have become local due to symbol
6889 visibility changes. */
6893 /* Relocs that use pc_count are those that appear on a call
6894 insn, or certain REL relocs that can generated via assembly.
6895 We want calls to protected symbols to resolve directly to the
6896 function rather than going via the plt. If people want
6897 function pointer comparisons to work as expected then they
6898 should avoid writing weird assembly. */
6899 if (SYMBOL_CALLS_LOCAL (info, h))
6901 struct elf_dyn_relocs **pp;
6903 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
6905 p->count -= p->pc_count;
6914 /* Also discard relocs on undefined weak syms with non-default
6916 if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
6918 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6919 eh->dyn_relocs = NULL;
6921 /* Make sure undefined weak symbols are output as a dynamic
6923 else if (h->dynindx == -1
6925 && !bfd_elf_link_record_dynamic_symbol (info, h))
6930 else if (ELIMINATE_COPY_RELOCS)
6932 /* For the non-shared case, discard space for relocs against
6933 symbols which turn out to need copy relocs or are not
6939 || (htab->root.dynamic_sections_created
6940 && (h->root.type == bfd_link_hash_undefweak
6941 || h->root.type == bfd_link_hash_undefined))))
6943 /* Make sure this symbol is output as a dynamic symbol.
6944 Undefined weak syms won't yet be marked as dynamic. */
6945 if (h->dynindx == -1
6947 && !bfd_elf_link_record_dynamic_symbol (info, h))
6950 /* If that succeeded, we know we'll be keeping all the
6952 if (h->dynindx != -1)
6956 eh->dyn_relocs = NULL;
6961 /* Finally, allocate space. */
6962 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6966 sreloc = elf_section_data (p->sec)->sreloc;
6968 BFD_ASSERT (sreloc != NULL);
6970 sreloc->size += p->count * RELOC_SIZE (htab);
6976 /* Allocate space in .plt, .got and associated reloc sections for
6977 ifunc dynamic relocs. */
6980 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
6983 struct bfd_link_info *info;
6984 struct elf_aarch64_link_hash_table *htab;
6985 struct elf_aarch64_link_hash_entry *eh;
6987 /* An example of a bfd_link_hash_indirect symbol is versioned
6988 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
6989 -> __gxx_personality_v0(bfd_link_hash_defined)
6991 There is no need to process bfd_link_hash_indirect symbols here
6992 because we will also be presented with the concrete instance of
6993 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
6994 called to copy all relevant data from the generic to the concrete
6997 if (h->root.type == bfd_link_hash_indirect)
7000 if (h->root.type == bfd_link_hash_warning)
7001 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7003 info = (struct bfd_link_info *) inf;
7004 htab = elf_aarch64_hash_table (info);
7006 eh = (struct elf_aarch64_link_hash_entry *) h;
7008 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
7009 here if it is defined and referenced in a non-shared object. */
7010 if (h->type == STT_GNU_IFUNC
7012 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
7014 htab->plt_entry_size,
7015 htab->plt_header_size,
7020 /* Allocate space in .plt, .got and associated reloc sections for
7021 local dynamic relocs. */
7024 elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
7026 struct elf_link_hash_entry *h
7027 = (struct elf_link_hash_entry *) *slot;
7029 if (h->type != STT_GNU_IFUNC
7033 || h->root.type != bfd_link_hash_defined)
7036 return elfNN_aarch64_allocate_dynrelocs (h, inf);
7039 /* Allocate space in .plt, .got and associated reloc sections for
7040 local ifunc dynamic relocs. */
7043 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
7045 struct elf_link_hash_entry *h
7046 = (struct elf_link_hash_entry *) *slot;
7048 if (h->type != STT_GNU_IFUNC
7052 || h->root.type != bfd_link_hash_defined)
7055 return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
7058 /* This is the most important function of all . Innocuosly named
7061 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7062 struct bfd_link_info *info)
7064 struct elf_aarch64_link_hash_table *htab;
7070 htab = elf_aarch64_hash_table ((info));
7071 dynobj = htab->root.dynobj;
7073 BFD_ASSERT (dynobj != NULL);
7075 if (htab->root.dynamic_sections_created)
7077 if (info->executable)
7079 s = bfd_get_linker_section (dynobj, ".interp");
7082 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7083 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7087 /* Set up .got offsets for local syms, and space for local dynamic
7089 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7091 struct elf_aarch64_local_symbol *locals = NULL;
7092 Elf_Internal_Shdr *symtab_hdr;
7096 if (!is_aarch64_elf (ibfd))
7099 for (s = ibfd->sections; s != NULL; s = s->next)
7101 struct elf_dyn_relocs *p;
7103 for (p = (struct elf_dyn_relocs *)
7104 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
7106 if (!bfd_is_abs_section (p->sec)
7107 && bfd_is_abs_section (p->sec->output_section))
7109 /* Input section has been discarded, either because
7110 it is a copy of a linkonce section or due to
7111 linker script /DISCARD/, so we'll be discarding
7114 else if (p->count != 0)
7116 srel = elf_section_data (p->sec)->sreloc;
7117 srel->size += p->count * RELOC_SIZE (htab);
7118 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7119 info->flags |= DF_TEXTREL;
7124 locals = elf_aarch64_locals (ibfd);
7128 symtab_hdr = &elf_symtab_hdr (ibfd);
7129 srel = htab->root.srelgot;
7130 for (i = 0; i < symtab_hdr->sh_info; i++)
7132 locals[i].got_offset = (bfd_vma) - 1;
7133 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
7134 if (locals[i].got_refcount > 0)
7136 unsigned got_type = locals[i].got_type;
7137 if (got_type & GOT_TLSDESC_GD)
7139 locals[i].tlsdesc_got_jump_table_offset =
7140 (htab->root.sgotplt->size
7141 - aarch64_compute_jump_table_size (htab));
7142 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
7143 locals[i].got_offset = (bfd_vma) - 2;
7146 if (got_type & GOT_TLS_GD)
7148 locals[i].got_offset = htab->root.sgot->size;
7149 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
7152 if (got_type & GOT_TLS_IE)
7154 locals[i].got_offset = htab->root.sgot->size;
7155 htab->root.sgot->size += GOT_ENTRY_SIZE;
7158 if (got_type == GOT_UNKNOWN)
7162 if (got_type == GOT_NORMAL)
7168 if (got_type & GOT_TLSDESC_GD)
7170 htab->root.srelplt->size += RELOC_SIZE (htab);
7171 /* Note RELOC_COUNT not incremented here! */
7172 htab->tlsdesc_plt = (bfd_vma) - 1;
7175 if (got_type & GOT_TLS_GD)
7176 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
7178 if (got_type & GOT_TLS_IE)
7179 htab->root.srelgot->size += RELOC_SIZE (htab);
7184 locals[i].got_refcount = (bfd_vma) - 1;
7190 /* Allocate global sym .plt and .got entries, and space for global
7191 sym dynamic relocs. */
7192 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
7195 /* Allocate global ifunc sym .plt and .got entries, and space for global
7196 ifunc sym dynamic relocs. */
7197 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
7200 /* Allocate .plt and .got entries, and space for local symbols. */
7201 htab_traverse (htab->loc_hash_table,
7202 elfNN_aarch64_allocate_local_dynrelocs,
7205 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
7206 htab_traverse (htab->loc_hash_table,
7207 elfNN_aarch64_allocate_local_ifunc_dynrelocs,
7210 /* For every jump slot reserved in the sgotplt, reloc_count is
7211 incremented. However, when we reserve space for TLS descriptors,
7212 it's not incremented, so in order to compute the space reserved
7213 for them, it suffices to multiply the reloc count by the jump
7216 if (htab->root.srelplt)
7217 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
7219 if (htab->tlsdesc_plt)
7221 if (htab->root.splt->size == 0)
7222 htab->root.splt->size += PLT_ENTRY_SIZE;
7224 htab->tlsdesc_plt = htab->root.splt->size;
7225 htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
7227 /* If we're not using lazy TLS relocations, don't generate the
7228 GOT entry required. */
7229 if (!(info->flags & DF_BIND_NOW))
7231 htab->dt_tlsdesc_got = htab->root.sgot->size;
7232 htab->root.sgot->size += GOT_ENTRY_SIZE;
7236 /* Init mapping symbols information to use later to distingush between
7237 code and data while scanning for erratam 835769. */
7238 if (htab->fix_erratum_835769)
7239 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7241 if (!is_aarch64_elf (ibfd))
7243 bfd_elfNN_aarch64_init_maps (ibfd);
7246 /* We now have determined the sizes of the various dynamic sections.
7247 Allocate memory for them. */
7249 for (s = dynobj->sections; s != NULL; s = s->next)
7251 if ((s->flags & SEC_LINKER_CREATED) == 0)
7254 if (s == htab->root.splt
7255 || s == htab->root.sgot
7256 || s == htab->root.sgotplt
7257 || s == htab->root.iplt
7258 || s == htab->root.igotplt || s == htab->sdynbss)
7260 /* Strip this section if we don't need it; see the
7263 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7265 if (s->size != 0 && s != htab->root.srelplt)
7268 /* We use the reloc_count field as a counter if we need
7269 to copy relocs into the output file. */
7270 if (s != htab->root.srelplt)
7275 /* It's not one of our sections, so don't allocate space. */
7281 /* If we don't need this section, strip it from the
7282 output file. This is mostly to handle .rela.bss and
7283 .rela.plt. We must create both sections in
7284 create_dynamic_sections, because they must be created
7285 before the linker maps input sections to output
7286 sections. The linker does that before
7287 adjust_dynamic_symbol is called, and it is that
7288 function which decides whether anything needs to go
7289 into these sections. */
7291 s->flags |= SEC_EXCLUDE;
7295 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7298 /* Allocate memory for the section contents. We use bfd_zalloc
7299 here in case unused entries are not reclaimed before the
7300 section's contents are written out. This should not happen,
7301 but this way if it does, we get a R_AARCH64_NONE reloc instead
7303 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
7304 if (s->contents == NULL)
7308 if (htab->root.dynamic_sections_created)
7310 /* Add some entries to the .dynamic section. We fill in the
7311 values later, in elfNN_aarch64_finish_dynamic_sections, but we
7312 must add the entries now so that we get the correct size for
7313 the .dynamic section. The DT_DEBUG entry is filled in by the
7314 dynamic linker and used by the debugger. */
7315 #define add_dynamic_entry(TAG, VAL) \
7316 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7318 if (info->executable)
7320 if (!add_dynamic_entry (DT_DEBUG, 0))
7324 if (htab->root.splt->size != 0)
7326 if (!add_dynamic_entry (DT_PLTGOT, 0)
7327 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7328 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7329 || !add_dynamic_entry (DT_JMPREL, 0))
7332 if (htab->tlsdesc_plt
7333 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
7334 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
7340 if (!add_dynamic_entry (DT_RELA, 0)
7341 || !add_dynamic_entry (DT_RELASZ, 0)
7342 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
7345 /* If any dynamic relocs apply to a read-only section,
7346 then we need a DT_TEXTREL entry. */
7347 if ((info->flags & DF_TEXTREL) != 0)
7349 if (!add_dynamic_entry (DT_TEXTREL, 0))
7354 #undef add_dynamic_entry
7360 elf_aarch64_update_plt_entry (bfd *output_bfd,
7361 bfd_reloc_code_real_type r_type,
7362 bfd_byte *plt_entry, bfd_vma value)
7364 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
7366 _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
7370 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
7371 struct elf_aarch64_link_hash_table
7372 *htab, bfd *output_bfd,
7373 struct bfd_link_info *info)
7375 bfd_byte *plt_entry;
7378 bfd_vma gotplt_entry_address;
7379 bfd_vma plt_entry_address;
7380 Elf_Internal_Rela rela;
7382 asection *plt, *gotplt, *relplt;
7384 /* When building a static executable, use .iplt, .igot.plt and
7385 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7386 if (htab->root.splt != NULL)
7388 plt = htab->root.splt;
7389 gotplt = htab->root.sgotplt;
7390 relplt = htab->root.srelplt;
7394 plt = htab->root.iplt;
7395 gotplt = htab->root.igotplt;
7396 relplt = htab->root.irelplt;
7399 /* Get the index in the procedure linkage table which
7400 corresponds to this symbol. This is the index of this symbol
7401 in all the symbols for which we are making plt entries. The
7402 first entry in the procedure linkage table is reserved.
7404 Get the offset into the .got table of the entry that
7405 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
7406 bytes. The first three are reserved for the dynamic linker.
7408 For static executables, we don't reserve anything. */
7410 if (plt == htab->root.splt)
7412 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
7413 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
7417 plt_index = h->plt.offset / htab->plt_entry_size;
7418 got_offset = plt_index * GOT_ENTRY_SIZE;
7421 plt_entry = plt->contents + h->plt.offset;
7422 plt_entry_address = plt->output_section->vma
7423 + plt->output_offset + h->plt.offset;
7424 gotplt_entry_address = gotplt->output_section->vma +
7425 gotplt->output_offset + got_offset;
7427 /* Copy in the boiler-plate for the PLTn entry. */
7428 memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
7430 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
7431 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
7432 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7434 PG (gotplt_entry_address) -
7435 PG (plt_entry_address));
7437 /* Fill in the lo12 bits for the load from the pltgot. */
7438 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
7440 PG_OFFSET (gotplt_entry_address));
7442 /* Fill in the lo12 bits for the add from the pltgot entry. */
7443 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
7445 PG_OFFSET (gotplt_entry_address));
7447 /* All the GOTPLT Entries are essentially initialized to PLT0. */
7448 bfd_put_NN (output_bfd,
7449 plt->output_section->vma + plt->output_offset,
7450 gotplt->contents + got_offset);
7452 rela.r_offset = gotplt_entry_address;
7454 if (h->dynindx == -1
7455 || ((info->executable
7456 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7458 && h->type == STT_GNU_IFUNC))
7460 /* If an STT_GNU_IFUNC symbol is locally defined, generate
7461 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
7462 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
7463 rela.r_addend = (h->root.u.def.value
7464 + h->root.u.def.section->output_section->vma
7465 + h->root.u.def.section->output_offset);
7469 /* Fill in the entry in the .rela.plt section. */
7470 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
7474 /* Compute the relocation entry to used based on PLT index and do
7475 not adjust reloc_count. The reloc_count has already been adjusted
7476 to account for this entry. */
7477 loc = relplt->contents + plt_index * RELOC_SIZE (htab);
7478 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7481 /* Size sections even though they're not dynamic. We use it to setup
7482 _TLS_MODULE_BASE_, if needed. */
7485 elfNN_aarch64_always_size_sections (bfd *output_bfd,
7486 struct bfd_link_info *info)
7490 if (info->relocatable)
7493 tls_sec = elf_hash_table (info)->tls_sec;
7497 struct elf_link_hash_entry *tlsbase;
7499 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
7500 "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
7504 struct bfd_link_hash_entry *h = NULL;
7505 const struct elf_backend_data *bed =
7506 get_elf_backend_data (output_bfd);
7508 if (!(_bfd_generic_link_add_one_symbol
7509 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
7510 tls_sec, 0, NULL, FALSE, bed->collect, &h)))
7513 tlsbase->type = STT_TLS;
7514 tlsbase = (struct elf_link_hash_entry *) h;
7515 tlsbase->def_regular = 1;
7516 tlsbase->other = STV_HIDDEN;
7517 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
7524 /* Finish up dynamic symbol handling. We set the contents of various
7525 dynamic sections here. */
7527 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
7528 struct bfd_link_info *info,
7529 struct elf_link_hash_entry *h,
7530 Elf_Internal_Sym *sym)
7532 struct elf_aarch64_link_hash_table *htab;
7533 htab = elf_aarch64_hash_table (info);
7535 if (h->plt.offset != (bfd_vma) - 1)
7537 asection *plt, *gotplt, *relplt;
7539 /* This symbol has an entry in the procedure linkage table. Set
7542 /* When building a static executable, use .iplt, .igot.plt and
7543 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7544 if (htab->root.splt != NULL)
7546 plt = htab->root.splt;
7547 gotplt = htab->root.sgotplt;
7548 relplt = htab->root.srelplt;
7552 plt = htab->root.iplt;
7553 gotplt = htab->root.igotplt;
7554 relplt = htab->root.irelplt;
7557 /* This symbol has an entry in the procedure linkage table. Set
7559 if ((h->dynindx == -1
7560 && !((h->forced_local || info->executable)
7562 && h->type == STT_GNU_IFUNC))
7568 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
7569 if (!h->def_regular)
7571 /* Mark the symbol as undefined, rather than as defined in
7572 the .plt section. */
7573 sym->st_shndx = SHN_UNDEF;
7574 /* If the symbol is weak we need to clear the value.
7575 Otherwise, the PLT entry would provide a definition for
7576 the symbol even if the symbol wasn't defined anywhere,
7577 and so the symbol would never be NULL. Leave the value if
7578 there were any relocations where pointer equality matters
7579 (this is a clue for the dynamic linker, to make function
7580 pointer comparisons work between an application and shared
7582 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
7587 if (h->got.offset != (bfd_vma) - 1
7588 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL)
7590 Elf_Internal_Rela rela;
7593 /* This symbol has an entry in the global offset table. Set it
7595 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
7598 rela.r_offset = (htab->root.sgot->output_section->vma
7599 + htab->root.sgot->output_offset
7600 + (h->got.offset & ~(bfd_vma) 1));
7603 && h->type == STT_GNU_IFUNC)
7607 /* Generate R_AARCH64_GLOB_DAT. */
7614 if (!h->pointer_equality_needed)
7617 /* For non-shared object, we can't use .got.plt, which
7618 contains the real function address if we need pointer
7619 equality. We load the GOT entry with the PLT entry. */
7620 plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
7621 bfd_put_NN (output_bfd, (plt->output_section->vma
7622 + plt->output_offset
7624 htab->root.sgot->contents
7625 + (h->got.offset & ~(bfd_vma) 1));
7629 else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
7631 if (!h->def_regular)
7634 BFD_ASSERT ((h->got.offset & 1) != 0);
7635 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
7636 rela.r_addend = (h->root.u.def.value
7637 + h->root.u.def.section->output_section->vma
7638 + h->root.u.def.section->output_offset);
7643 BFD_ASSERT ((h->got.offset & 1) == 0);
7644 bfd_put_NN (output_bfd, (bfd_vma) 0,
7645 htab->root.sgot->contents + h->got.offset);
7646 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
7650 loc = htab->root.srelgot->contents;
7651 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
7652 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7657 Elf_Internal_Rela rela;
7660 /* This symbol needs a copy reloc. Set it up. */
7662 if (h->dynindx == -1
7663 || (h->root.type != bfd_link_hash_defined
7664 && h->root.type != bfd_link_hash_defweak)
7665 || htab->srelbss == NULL)
7668 rela.r_offset = (h->root.u.def.value
7669 + h->root.u.def.section->output_section->vma
7670 + h->root.u.def.section->output_offset);
7671 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
7673 loc = htab->srelbss->contents;
7674 loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab);
7675 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7678 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
7679 be NULL for local symbols. */
7681 && (h == elf_hash_table (info)->hdynamic
7682 || h == elf_hash_table (info)->hgot))
7683 sym->st_shndx = SHN_ABS;
7688 /* Finish up local dynamic symbol handling. We set the contents of
7689 various dynamic sections here. */
7692 elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
7694 struct elf_link_hash_entry *h
7695 = (struct elf_link_hash_entry *) *slot;
7696 struct bfd_link_info *info
7697 = (struct bfd_link_info *) inf;
7699 return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
7704 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
7705 struct elf_aarch64_link_hash_table
7708 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
7709 small and large plts and at the minute just generates
7712 /* PLT0 of the small PLT looks like this in ELF64 -
7713 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
7714 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
7715 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
7717 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
7718 // GOTPLT entry for this.
7720 PLT0 will be slightly different in ELF32 due to different got entry
7723 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
7727 memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
7729 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
7732 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
7733 + htab->root.sgotplt->output_offset
7734 + GOT_ENTRY_SIZE * 2);
7736 plt_base = htab->root.splt->output_section->vma +
7737 htab->root.splt->output_offset;
7739 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
7740 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
7741 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7742 htab->root.splt->contents + 4,
7743 PG (plt_got_2nd_ent) - PG (plt_base + 4));
7745 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
7746 htab->root.splt->contents + 8,
7747 PG_OFFSET (plt_got_2nd_ent));
7749 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
7750 htab->root.splt->contents + 12,
7751 PG_OFFSET (plt_got_2nd_ent));
7755 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
7756 struct bfd_link_info *info)
7758 struct elf_aarch64_link_hash_table *htab;
7762 htab = elf_aarch64_hash_table (info);
7763 dynobj = htab->root.dynobj;
7764 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
7766 if (htab->root.dynamic_sections_created)
7768 ElfNN_External_Dyn *dyncon, *dynconend;
7770 if (sdyn == NULL || htab->root.sgot == NULL)
7773 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
7774 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
7775 for (; dyncon < dynconend; dyncon++)
7777 Elf_Internal_Dyn dyn;
7780 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
7788 s = htab->root.sgotplt;
7789 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7793 dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma;
7797 s = htab->root.srelplt;
7798 dyn.d_un.d_val = s->size;
7802 /* The procedure linkage table relocs (DT_JMPREL) should
7803 not be included in the overall relocs (DT_RELA).
7804 Therefore, we override the DT_RELASZ entry here to
7805 make it not include the JMPREL relocs. Since the
7806 linker script arranges for .rela.plt to follow all
7807 other relocation sections, we don't have to worry
7808 about changing the DT_RELA entry. */
7809 if (htab->root.srelplt != NULL)
7811 s = htab->root.srelplt;
7812 dyn.d_un.d_val -= s->size;
7816 case DT_TLSDESC_PLT:
7817 s = htab->root.splt;
7818 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
7819 + htab->tlsdesc_plt;
7822 case DT_TLSDESC_GOT:
7823 s = htab->root.sgot;
7824 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
7825 + htab->dt_tlsdesc_got;
7829 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
7834 /* Fill in the special first entry in the procedure linkage table. */
7835 if (htab->root.splt && htab->root.splt->size > 0)
7837 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
7839 elf_section_data (htab->root.splt->output_section)->
7840 this_hdr.sh_entsize = htab->plt_entry_size;
7843 if (htab->tlsdesc_plt)
7845 bfd_put_NN (output_bfd, (bfd_vma) 0,
7846 htab->root.sgot->contents + htab->dt_tlsdesc_got);
7848 memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
7849 elfNN_aarch64_tlsdesc_small_plt_entry,
7850 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
7853 bfd_vma adrp1_addr =
7854 htab->root.splt->output_section->vma
7855 + htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
7857 bfd_vma adrp2_addr = adrp1_addr + 4;
7860 htab->root.sgot->output_section->vma
7861 + htab->root.sgot->output_offset;
7863 bfd_vma pltgot_addr =
7864 htab->root.sgotplt->output_section->vma
7865 + htab->root.sgotplt->output_offset;
7867 bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
7869 bfd_byte *plt_entry =
7870 htab->root.splt->contents + htab->tlsdesc_plt;
7872 /* adrp x2, DT_TLSDESC_GOT */
7873 elf_aarch64_update_plt_entry (output_bfd,
7874 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7876 (PG (dt_tlsdesc_got)
7877 - PG (adrp1_addr)));
7880 elf_aarch64_update_plt_entry (output_bfd,
7881 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7884 - PG (adrp2_addr)));
7886 /* ldr x2, [x2, #0] */
7887 elf_aarch64_update_plt_entry (output_bfd,
7888 BFD_RELOC_AARCH64_LDSTNN_LO12,
7890 PG_OFFSET (dt_tlsdesc_got));
7893 elf_aarch64_update_plt_entry (output_bfd,
7894 BFD_RELOC_AARCH64_ADD_LO12,
7896 PG_OFFSET (pltgot_addr));
7901 if (htab->root.sgotplt)
7903 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
7905 (*_bfd_error_handler)
7906 (_("discarded output section: `%A'"), htab->root.sgotplt);
7910 /* Fill in the first three entries in the global offset table. */
7911 if (htab->root.sgotplt->size > 0)
7913 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
7915 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
7916 bfd_put_NN (output_bfd,
7918 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
7919 bfd_put_NN (output_bfd,
7921 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
7924 if (htab->root.sgot)
7926 if (htab->root.sgot->size > 0)
7929 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
7930 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
7934 elf_section_data (htab->root.sgotplt->output_section)->
7935 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
7938 if (htab->root.sgot && htab->root.sgot->size > 0)
7939 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
7942 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
7943 htab_traverse (htab->loc_hash_table,
7944 elfNN_aarch64_finish_local_dynamic_symbol,
7950 /* Return address for Ith PLT stub in section PLT, for relocation REL
7951 or (bfd_vma) -1 if it should not be included. */
7954 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
7955 const arelent *rel ATTRIBUTE_UNUSED)
7957 return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
7961 /* We use this so we can override certain functions
7962 (though currently we don't). */
7964 const struct elf_size_info elfNN_aarch64_size_info =
7966 sizeof (ElfNN_External_Ehdr),
7967 sizeof (ElfNN_External_Phdr),
7968 sizeof (ElfNN_External_Shdr),
7969 sizeof (ElfNN_External_Rel),
7970 sizeof (ElfNN_External_Rela),
7971 sizeof (ElfNN_External_Sym),
7972 sizeof (ElfNN_External_Dyn),
7973 sizeof (Elf_External_Note),
7974 4, /* Hash table entry size. */
7975 1, /* Internal relocs per external relocs. */
7976 ARCH_SIZE, /* Arch size. */
7977 LOG_FILE_ALIGN, /* Log_file_align. */
7978 ELFCLASSNN, EV_CURRENT,
7979 bfd_elfNN_write_out_phdrs,
7980 bfd_elfNN_write_shdrs_and_ehdr,
7981 bfd_elfNN_checksum_contents,
7982 bfd_elfNN_write_relocs,
7983 bfd_elfNN_swap_symbol_in,
7984 bfd_elfNN_swap_symbol_out,
7985 bfd_elfNN_slurp_reloc_table,
7986 bfd_elfNN_slurp_symbol_table,
7987 bfd_elfNN_swap_dyn_in,
7988 bfd_elfNN_swap_dyn_out,
7989 bfd_elfNN_swap_reloc_in,
7990 bfd_elfNN_swap_reloc_out,
7991 bfd_elfNN_swap_reloca_in,
7992 bfd_elfNN_swap_reloca_out
7995 #define ELF_ARCH bfd_arch_aarch64
7996 #define ELF_MACHINE_CODE EM_AARCH64
7997 #define ELF_MAXPAGESIZE 0x10000
7998 #define ELF_MINPAGESIZE 0x1000
7999 #define ELF_COMMONPAGESIZE 0x1000
8001 #define bfd_elfNN_close_and_cleanup \
8002 elfNN_aarch64_close_and_cleanup
8004 #define bfd_elfNN_bfd_free_cached_info \
8005 elfNN_aarch64_bfd_free_cached_info
8007 #define bfd_elfNN_bfd_is_target_special_symbol \
8008 elfNN_aarch64_is_target_special_symbol
8010 #define bfd_elfNN_bfd_link_hash_table_create \
8011 elfNN_aarch64_link_hash_table_create
8013 #define bfd_elfNN_bfd_merge_private_bfd_data \
8014 elfNN_aarch64_merge_private_bfd_data
8016 #define bfd_elfNN_bfd_print_private_bfd_data \
8017 elfNN_aarch64_print_private_bfd_data
8019 #define bfd_elfNN_bfd_reloc_type_lookup \
8020 elfNN_aarch64_reloc_type_lookup
8022 #define bfd_elfNN_bfd_reloc_name_lookup \
8023 elfNN_aarch64_reloc_name_lookup
8025 #define bfd_elfNN_bfd_set_private_flags \
8026 elfNN_aarch64_set_private_flags
8028 #define bfd_elfNN_find_inliner_info \
8029 elfNN_aarch64_find_inliner_info
8031 #define bfd_elfNN_find_nearest_line \
8032 elfNN_aarch64_find_nearest_line
8034 #define bfd_elfNN_mkobject \
8035 elfNN_aarch64_mkobject
8037 #define bfd_elfNN_new_section_hook \
8038 elfNN_aarch64_new_section_hook
8040 #define elf_backend_adjust_dynamic_symbol \
8041 elfNN_aarch64_adjust_dynamic_symbol
8043 #define elf_backend_always_size_sections \
8044 elfNN_aarch64_always_size_sections
8046 #define elf_backend_check_relocs \
8047 elfNN_aarch64_check_relocs
8049 #define elf_backend_copy_indirect_symbol \
8050 elfNN_aarch64_copy_indirect_symbol
8052 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
8053 to them in our hash. */
8054 #define elf_backend_create_dynamic_sections \
8055 elfNN_aarch64_create_dynamic_sections
8057 #define elf_backend_init_index_section \
8058 _bfd_elf_init_2_index_sections
8060 #define elf_backend_finish_dynamic_sections \
8061 elfNN_aarch64_finish_dynamic_sections
8063 #define elf_backend_finish_dynamic_symbol \
8064 elfNN_aarch64_finish_dynamic_symbol
8066 #define elf_backend_gc_sweep_hook \
8067 elfNN_aarch64_gc_sweep_hook
8069 #define elf_backend_object_p \
8070 elfNN_aarch64_object_p
8072 #define elf_backend_output_arch_local_syms \
8073 elfNN_aarch64_output_arch_local_syms
8075 #define elf_backend_plt_sym_val \
8076 elfNN_aarch64_plt_sym_val
8078 #define elf_backend_post_process_headers \
8079 elfNN_aarch64_post_process_headers
8081 #define elf_backend_relocate_section \
8082 elfNN_aarch64_relocate_section
8084 #define elf_backend_reloc_type_class \
8085 elfNN_aarch64_reloc_type_class
8087 #define elf_backend_section_from_shdr \
8088 elfNN_aarch64_section_from_shdr
8090 #define elf_backend_size_dynamic_sections \
8091 elfNN_aarch64_size_dynamic_sections
8093 #define elf_backend_size_info \
8094 elfNN_aarch64_size_info
8096 #define elf_backend_write_section \
8097 elfNN_aarch64_write_section
8099 #define elf_backend_can_refcount 1
8100 #define elf_backend_can_gc_sections 1
8101 #define elf_backend_plt_readonly 1
8102 #define elf_backend_want_got_plt 1
8103 #define elf_backend_want_plt_sym 0
8104 #define elf_backend_may_use_rel_p 0
8105 #define elf_backend_may_use_rela_p 1
8106 #define elf_backend_default_use_rela_p 1
8107 #define elf_backend_rela_normal 1
8108 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
8109 #define elf_backend_default_execstack 0
8111 #undef elf_backend_obj_attrs_section
8112 #define elf_backend_obj_attrs_section ".ARM.attributes"
8114 #include "elfNN-target.h"