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_ADD_LO12_NC \
169 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
170 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
171 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
182 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
183 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
184 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
186 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
187 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
188 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
189 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
190 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
192 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
193 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \
194 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
195 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \
201 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
202 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
203 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
204 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1)
206 #define ELIMINATE_COPY_RELOCS 0
208 /* Return size of a relocation entry. HTAB is the bfd's
209 elf_aarch64_link_hash_entry. */
210 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
212 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
213 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
214 #define PLT_ENTRY_SIZE (32)
215 #define PLT_SMALL_ENTRY_SIZE (16)
216 #define PLT_TLSDESC_ENTRY_SIZE (32)
218 /* Encoding of the nop instruction */
219 #define INSN_NOP 0xd503201f
221 #define aarch64_compute_jump_table_size(htab) \
222 (((htab)->root.srelplt == NULL) ? 0 \
223 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
225 /* The first entry in a procedure linkage table looks like this
226 if the distance between the PLTGOT and the PLT is < 4GB use
227 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
228 in x16 and needs to work out PLTGOT[1] by using an address of
229 [x16,#-GOT_ENTRY_SIZE]. */
230 static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] =
232 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
233 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
235 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
236 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
238 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
239 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
241 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
242 0x1f, 0x20, 0x03, 0xd5, /* nop */
243 0x1f, 0x20, 0x03, 0xd5, /* nop */
244 0x1f, 0x20, 0x03, 0xd5, /* nop */
247 /* Per function entry in a procedure linkage table looks like this
248 if the distance between the PLTGOT and the PLT is < 4GB use
249 these PLT entries. */
250 static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] =
252 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
254 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
255 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
257 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
258 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
260 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
263 static const bfd_byte
264 elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
266 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
267 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
268 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
270 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
271 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
273 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
274 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
276 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
277 0x1f, 0x20, 0x03, 0xd5, /* nop */
278 0x1f, 0x20, 0x03, 0xd5, /* nop */
281 #define elf_info_to_howto elfNN_aarch64_info_to_howto
282 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
284 #define AARCH64_ELF_ABI_VERSION 0
286 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
287 #define ALL_ONES (~ (bfd_vma) 0)
289 /* Indexed by the bfd interal reloc enumerators.
290 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
293 static reloc_howto_type elfNN_aarch64_howto_table[] =
297 /* Basic data relocations. */
300 HOWTO (R_AARCH64_NULL, /* type */
302 3, /* size (0 = byte, 1 = short, 2 = long) */
304 FALSE, /* pc_relative */
306 complain_overflow_dont, /* complain_on_overflow */
307 bfd_elf_generic_reloc, /* special_function */
308 "R_AARCH64_NULL", /* name */
309 FALSE, /* partial_inplace */
312 FALSE), /* pcrel_offset */
314 HOWTO (R_AARCH64_NONE, /* type */
316 3, /* size (0 = byte, 1 = short, 2 = long) */
318 FALSE, /* pc_relative */
320 complain_overflow_dont, /* complain_on_overflow */
321 bfd_elf_generic_reloc, /* special_function */
322 "R_AARCH64_NONE", /* name */
323 FALSE, /* partial_inplace */
326 FALSE), /* pcrel_offset */
330 HOWTO64 (AARCH64_R (ABS64), /* type */
332 4, /* size (4 = long long) */
334 FALSE, /* pc_relative */
336 complain_overflow_unsigned, /* complain_on_overflow */
337 bfd_elf_generic_reloc, /* special_function */
338 AARCH64_R_STR (ABS64), /* name */
339 FALSE, /* partial_inplace */
340 ALL_ONES, /* src_mask */
341 ALL_ONES, /* dst_mask */
342 FALSE), /* pcrel_offset */
345 HOWTO (AARCH64_R (ABS32), /* type */
347 2, /* size (0 = byte, 1 = short, 2 = long) */
349 FALSE, /* pc_relative */
351 complain_overflow_unsigned, /* complain_on_overflow */
352 bfd_elf_generic_reloc, /* special_function */
353 AARCH64_R_STR (ABS32), /* name */
354 FALSE, /* partial_inplace */
355 0xffffffff, /* src_mask */
356 0xffffffff, /* dst_mask */
357 FALSE), /* pcrel_offset */
360 HOWTO (AARCH64_R (ABS16), /* type */
362 1, /* size (0 = byte, 1 = short, 2 = long) */
364 FALSE, /* pc_relative */
366 complain_overflow_unsigned, /* complain_on_overflow */
367 bfd_elf_generic_reloc, /* special_function */
368 AARCH64_R_STR (ABS16), /* name */
369 FALSE, /* partial_inplace */
370 0xffff, /* src_mask */
371 0xffff, /* dst_mask */
372 FALSE), /* pcrel_offset */
374 /* .xword: (S+A-P) */
375 HOWTO64 (AARCH64_R (PREL64), /* type */
377 4, /* size (4 = long long) */
379 TRUE, /* pc_relative */
381 complain_overflow_signed, /* complain_on_overflow */
382 bfd_elf_generic_reloc, /* special_function */
383 AARCH64_R_STR (PREL64), /* name */
384 FALSE, /* partial_inplace */
385 ALL_ONES, /* src_mask */
386 ALL_ONES, /* dst_mask */
387 TRUE), /* pcrel_offset */
390 HOWTO (AARCH64_R (PREL32), /* type */
392 2, /* size (0 = byte, 1 = short, 2 = long) */
394 TRUE, /* pc_relative */
396 complain_overflow_signed, /* complain_on_overflow */
397 bfd_elf_generic_reloc, /* special_function */
398 AARCH64_R_STR (PREL32), /* name */
399 FALSE, /* partial_inplace */
400 0xffffffff, /* src_mask */
401 0xffffffff, /* dst_mask */
402 TRUE), /* pcrel_offset */
405 HOWTO (AARCH64_R (PREL16), /* type */
407 1, /* size (0 = byte, 1 = short, 2 = long) */
409 TRUE, /* pc_relative */
411 complain_overflow_signed, /* complain_on_overflow */
412 bfd_elf_generic_reloc, /* special_function */
413 AARCH64_R_STR (PREL16), /* name */
414 FALSE, /* partial_inplace */
415 0xffff, /* src_mask */
416 0xffff, /* dst_mask */
417 TRUE), /* pcrel_offset */
419 /* Group relocations to create a 16, 32, 48 or 64 bit
420 unsigned data or abs address inline. */
422 /* MOVZ: ((S+A) >> 0) & 0xffff */
423 HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
425 2, /* size (0 = byte, 1 = short, 2 = long) */
427 FALSE, /* pc_relative */
429 complain_overflow_unsigned, /* complain_on_overflow */
430 bfd_elf_generic_reloc, /* special_function */
431 AARCH64_R_STR (MOVW_UABS_G0), /* name */
432 FALSE, /* partial_inplace */
433 0xffff, /* src_mask */
434 0xffff, /* dst_mask */
435 FALSE), /* pcrel_offset */
437 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
438 HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
440 2, /* size (0 = byte, 1 = short, 2 = long) */
442 FALSE, /* pc_relative */
444 complain_overflow_dont, /* complain_on_overflow */
445 bfd_elf_generic_reloc, /* special_function */
446 AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */
447 FALSE, /* partial_inplace */
448 0xffff, /* src_mask */
449 0xffff, /* dst_mask */
450 FALSE), /* pcrel_offset */
452 /* MOVZ: ((S+A) >> 16) & 0xffff */
453 HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
455 2, /* size (0 = byte, 1 = short, 2 = long) */
457 FALSE, /* pc_relative */
459 complain_overflow_unsigned, /* complain_on_overflow */
460 bfd_elf_generic_reloc, /* special_function */
461 AARCH64_R_STR (MOVW_UABS_G1), /* name */
462 FALSE, /* partial_inplace */
463 0xffff, /* src_mask */
464 0xffff, /* dst_mask */
465 FALSE), /* pcrel_offset */
467 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
468 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
472 FALSE, /* pc_relative */
474 complain_overflow_dont, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */
477 FALSE, /* partial_inplace */
478 0xffff, /* src_mask */
479 0xffff, /* dst_mask */
480 FALSE), /* pcrel_offset */
482 /* MOVZ: ((S+A) >> 32) & 0xffff */
483 HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
485 2, /* size (0 = byte, 1 = short, 2 = long) */
487 FALSE, /* pc_relative */
489 complain_overflow_unsigned, /* complain_on_overflow */
490 bfd_elf_generic_reloc, /* special_function */
491 AARCH64_R_STR (MOVW_UABS_G2), /* name */
492 FALSE, /* partial_inplace */
493 0xffff, /* src_mask */
494 0xffff, /* dst_mask */
495 FALSE), /* pcrel_offset */
497 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
498 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
500 2, /* size (0 = byte, 1 = short, 2 = long) */
502 FALSE, /* pc_relative */
504 complain_overflow_dont, /* complain_on_overflow */
505 bfd_elf_generic_reloc, /* special_function */
506 AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */
507 FALSE, /* partial_inplace */
508 0xffff, /* src_mask */
509 0xffff, /* dst_mask */
510 FALSE), /* pcrel_offset */
512 /* MOVZ: ((S+A) >> 48) & 0xffff */
513 HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
515 2, /* size (0 = byte, 1 = short, 2 = long) */
517 FALSE, /* pc_relative */
519 complain_overflow_unsigned, /* complain_on_overflow */
520 bfd_elf_generic_reloc, /* special_function */
521 AARCH64_R_STR (MOVW_UABS_G3), /* name */
522 FALSE, /* partial_inplace */
523 0xffff, /* src_mask */
524 0xffff, /* dst_mask */
525 FALSE), /* pcrel_offset */
527 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
528 signed data or abs address inline. Will change instruction
529 to MOVN or MOVZ depending on sign of calculated value. */
531 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
532 HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
534 2, /* size (0 = byte, 1 = short, 2 = long) */
536 FALSE, /* pc_relative */
538 complain_overflow_signed, /* complain_on_overflow */
539 bfd_elf_generic_reloc, /* special_function */
540 AARCH64_R_STR (MOVW_SABS_G0), /* name */
541 FALSE, /* partial_inplace */
542 0xffff, /* src_mask */
543 0xffff, /* dst_mask */
544 FALSE), /* pcrel_offset */
546 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
547 HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
549 2, /* size (0 = byte, 1 = short, 2 = long) */
551 FALSE, /* pc_relative */
553 complain_overflow_signed, /* complain_on_overflow */
554 bfd_elf_generic_reloc, /* special_function */
555 AARCH64_R_STR (MOVW_SABS_G1), /* name */
556 FALSE, /* partial_inplace */
557 0xffff, /* src_mask */
558 0xffff, /* dst_mask */
559 FALSE), /* pcrel_offset */
561 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
562 HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
564 2, /* size (0 = byte, 1 = short, 2 = long) */
566 FALSE, /* pc_relative */
568 complain_overflow_signed, /* complain_on_overflow */
569 bfd_elf_generic_reloc, /* special_function */
570 AARCH64_R_STR (MOVW_SABS_G2), /* name */
571 FALSE, /* partial_inplace */
572 0xffff, /* src_mask */
573 0xffff, /* dst_mask */
574 FALSE), /* pcrel_offset */
576 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
577 addresses: PG(x) is (x & ~0xfff). */
579 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
580 HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
582 2, /* size (0 = byte, 1 = short, 2 = long) */
584 TRUE, /* pc_relative */
586 complain_overflow_signed, /* complain_on_overflow */
587 bfd_elf_generic_reloc, /* special_function */
588 AARCH64_R_STR (LD_PREL_LO19), /* name */
589 FALSE, /* partial_inplace */
590 0x7ffff, /* src_mask */
591 0x7ffff, /* dst_mask */
592 TRUE), /* pcrel_offset */
594 /* ADR: (S+A-P) & 0x1fffff */
595 HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
597 2, /* size (0 = byte, 1 = short, 2 = long) */
599 TRUE, /* pc_relative */
601 complain_overflow_signed, /* complain_on_overflow */
602 bfd_elf_generic_reloc, /* special_function */
603 AARCH64_R_STR (ADR_PREL_LO21), /* name */
604 FALSE, /* partial_inplace */
605 0x1fffff, /* src_mask */
606 0x1fffff, /* dst_mask */
607 TRUE), /* pcrel_offset */
609 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
610 HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
614 TRUE, /* pc_relative */
616 complain_overflow_signed, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */
619 FALSE, /* partial_inplace */
620 0x1fffff, /* src_mask */
621 0x1fffff, /* dst_mask */
622 TRUE), /* pcrel_offset */
624 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
625 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
627 2, /* size (0 = byte, 1 = short, 2 = long) */
629 TRUE, /* pc_relative */
631 complain_overflow_dont, /* complain_on_overflow */
632 bfd_elf_generic_reloc, /* special_function */
633 AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */
634 FALSE, /* partial_inplace */
635 0x1fffff, /* src_mask */
636 0x1fffff, /* dst_mask */
637 TRUE), /* pcrel_offset */
639 /* ADD: (S+A) & 0xfff [no overflow check] */
640 HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
642 2, /* size (0 = byte, 1 = short, 2 = long) */
644 FALSE, /* pc_relative */
646 complain_overflow_dont, /* complain_on_overflow */
647 bfd_elf_generic_reloc, /* special_function */
648 AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */
649 FALSE, /* partial_inplace */
650 0x3ffc00, /* src_mask */
651 0x3ffc00, /* dst_mask */
652 FALSE), /* pcrel_offset */
654 /* LD/ST8: (S+A) & 0xfff */
655 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
657 2, /* size (0 = byte, 1 = short, 2 = long) */
659 FALSE, /* pc_relative */
661 complain_overflow_dont, /* complain_on_overflow */
662 bfd_elf_generic_reloc, /* special_function */
663 AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */
664 FALSE, /* partial_inplace */
665 0xfff, /* src_mask */
666 0xfff, /* dst_mask */
667 FALSE), /* pcrel_offset */
669 /* Relocations for control-flow instructions. */
671 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
672 HOWTO (AARCH64_R (TSTBR14), /* type */
674 2, /* size (0 = byte, 1 = short, 2 = long) */
676 TRUE, /* pc_relative */
678 complain_overflow_signed, /* complain_on_overflow */
679 bfd_elf_generic_reloc, /* special_function */
680 AARCH64_R_STR (TSTBR14), /* name */
681 FALSE, /* partial_inplace */
682 0x3fff, /* src_mask */
683 0x3fff, /* dst_mask */
684 TRUE), /* pcrel_offset */
686 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
687 HOWTO (AARCH64_R (CONDBR19), /* type */
689 2, /* size (0 = byte, 1 = short, 2 = long) */
691 TRUE, /* pc_relative */
693 complain_overflow_signed, /* complain_on_overflow */
694 bfd_elf_generic_reloc, /* special_function */
695 AARCH64_R_STR (CONDBR19), /* name */
696 FALSE, /* partial_inplace */
697 0x7ffff, /* src_mask */
698 0x7ffff, /* dst_mask */
699 TRUE), /* pcrel_offset */
701 /* B: ((S+A-P) >> 2) & 0x3ffffff */
702 HOWTO (AARCH64_R (JUMP26), /* type */
704 2, /* size (0 = byte, 1 = short, 2 = long) */
706 TRUE, /* pc_relative */
708 complain_overflow_signed, /* complain_on_overflow */
709 bfd_elf_generic_reloc, /* special_function */
710 AARCH64_R_STR (JUMP26), /* name */
711 FALSE, /* partial_inplace */
712 0x3ffffff, /* src_mask */
713 0x3ffffff, /* dst_mask */
714 TRUE), /* pcrel_offset */
716 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
717 HOWTO (AARCH64_R (CALL26), /* type */
719 2, /* size (0 = byte, 1 = short, 2 = long) */
721 TRUE, /* pc_relative */
723 complain_overflow_signed, /* complain_on_overflow */
724 bfd_elf_generic_reloc, /* special_function */
725 AARCH64_R_STR (CALL26), /* name */
726 FALSE, /* partial_inplace */
727 0x3ffffff, /* src_mask */
728 0x3ffffff, /* dst_mask */
729 TRUE), /* pcrel_offset */
731 /* LD/ST16: (S+A) & 0xffe */
732 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
736 FALSE, /* pc_relative */
738 complain_overflow_dont, /* complain_on_overflow */
739 bfd_elf_generic_reloc, /* special_function */
740 AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */
741 FALSE, /* partial_inplace */
742 0xffe, /* src_mask */
743 0xffe, /* dst_mask */
744 FALSE), /* pcrel_offset */
746 /* LD/ST32: (S+A) & 0xffc */
747 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
749 2, /* size (0 = byte, 1 = short, 2 = long) */
751 FALSE, /* pc_relative */
753 complain_overflow_dont, /* complain_on_overflow */
754 bfd_elf_generic_reloc, /* special_function */
755 AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */
756 FALSE, /* partial_inplace */
757 0xffc, /* src_mask */
758 0xffc, /* dst_mask */
759 FALSE), /* pcrel_offset */
761 /* LD/ST64: (S+A) & 0xff8 */
762 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
764 2, /* size (0 = byte, 1 = short, 2 = long) */
766 FALSE, /* pc_relative */
768 complain_overflow_dont, /* complain_on_overflow */
769 bfd_elf_generic_reloc, /* special_function */
770 AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */
771 FALSE, /* partial_inplace */
772 0xff8, /* src_mask */
773 0xff8, /* dst_mask */
774 FALSE), /* pcrel_offset */
776 /* LD/ST128: (S+A) & 0xff0 */
777 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
779 2, /* size (0 = byte, 1 = short, 2 = long) */
781 FALSE, /* pc_relative */
783 complain_overflow_dont, /* complain_on_overflow */
784 bfd_elf_generic_reloc, /* special_function */
785 AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */
786 FALSE, /* partial_inplace */
787 0xff0, /* src_mask */
788 0xff0, /* dst_mask */
789 FALSE), /* pcrel_offset */
791 /* Set a load-literal immediate field to bits
792 0x1FFFFC of G(S)-P */
793 HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
795 2, /* size (0 = byte,1 = short,2 = long) */
797 TRUE, /* pc_relative */
799 complain_overflow_signed, /* complain_on_overflow */
800 bfd_elf_generic_reloc, /* special_function */
801 AARCH64_R_STR (GOT_LD_PREL19), /* name */
802 FALSE, /* partial_inplace */
803 0xffffe0, /* src_mask */
804 0xffffe0, /* dst_mask */
805 TRUE), /* pcrel_offset */
807 /* Get to the page for the GOT entry for the symbol
808 (G(S) - P) using an ADRP instruction. */
809 HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */
811 2, /* size (0 = byte, 1 = short, 2 = long) */
813 TRUE, /* pc_relative */
815 complain_overflow_dont, /* complain_on_overflow */
816 bfd_elf_generic_reloc, /* special_function */
817 AARCH64_R_STR (ADR_GOT_PAGE), /* name */
818 FALSE, /* partial_inplace */
819 0x1fffff, /* src_mask */
820 0x1fffff, /* dst_mask */
821 TRUE), /* pcrel_offset */
823 /* LD64: GOT offset G(S) & 0xff8 */
824 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
826 2, /* size (0 = byte, 1 = short, 2 = long) */
828 FALSE, /* pc_relative */
830 complain_overflow_dont, /* complain_on_overflow */
831 bfd_elf_generic_reloc, /* special_function */
832 AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */
833 FALSE, /* partial_inplace */
834 0xff8, /* src_mask */
835 0xff8, /* dst_mask */
836 FALSE), /* pcrel_offset */
838 /* LD32: GOT offset G(S) & 0xffc */
839 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
841 2, /* size (0 = byte, 1 = short, 2 = long) */
843 FALSE, /* pc_relative */
845 complain_overflow_dont, /* complain_on_overflow */
846 bfd_elf_generic_reloc, /* special_function */
847 AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */
848 FALSE, /* partial_inplace */
849 0xffc, /* src_mask */
850 0xffc, /* dst_mask */
851 FALSE), /* pcrel_offset */
853 /* LD64: GOT offset for the symbol. */
854 HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15), /* type */
856 2, /* size (0 = byte, 1 = short, 2 = long) */
858 FALSE, /* pc_relative */
860 complain_overflow_unsigned, /* complain_on_overflow */
861 bfd_elf_generic_reloc, /* special_function */
862 AARCH64_R_STR (LD64_GOTOFF_LO15), /* name */
863 FALSE, /* partial_inplace */
864 0x7ff8, /* src_mask */
865 0x7ff8, /* dst_mask */
866 FALSE), /* pcrel_offset */
868 /* LD32: GOT offset to the page address of GOT table.
869 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */
870 HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14), /* type */
872 2, /* size (0 = byte, 1 = short, 2 = long) */
874 FALSE, /* pc_relative */
876 complain_overflow_unsigned, /* complain_on_overflow */
877 bfd_elf_generic_reloc, /* special_function */
878 AARCH64_R_STR (LD32_GOTPAGE_LO14), /* name */
879 FALSE, /* partial_inplace */
880 0x5ffc, /* src_mask */
881 0x5ffc, /* dst_mask */
882 FALSE), /* pcrel_offset */
884 /* LD64: GOT offset to the page address of GOT table.
885 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */
886 HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15), /* type */
888 2, /* size (0 = byte, 1 = short, 2 = long) */
890 FALSE, /* pc_relative */
892 complain_overflow_unsigned, /* complain_on_overflow */
893 bfd_elf_generic_reloc, /* special_function */
894 AARCH64_R_STR (LD64_GOTPAGE_LO15), /* name */
895 FALSE, /* partial_inplace */
896 0x7ff8, /* src_mask */
897 0x7ff8, /* dst_mask */
898 FALSE), /* pcrel_offset */
900 /* Get to the page for the GOT entry for the symbol
901 (G(S) - P) using an ADRP instruction. */
902 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */
904 2, /* size (0 = byte, 1 = short, 2 = long) */
906 TRUE, /* pc_relative */
908 complain_overflow_dont, /* complain_on_overflow */
909 bfd_elf_generic_reloc, /* special_function */
910 AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */
911 FALSE, /* partial_inplace */
912 0x1fffff, /* src_mask */
913 0x1fffff, /* dst_mask */
914 TRUE), /* pcrel_offset */
916 HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */
918 2, /* size (0 = byte, 1 = short, 2 = long) */
920 TRUE, /* pc_relative */
922 complain_overflow_dont, /* complain_on_overflow */
923 bfd_elf_generic_reloc, /* special_function */
924 AARCH64_R_STR (TLSGD_ADR_PREL21), /* name */
925 FALSE, /* partial_inplace */
926 0x1fffff, /* src_mask */
927 0x1fffff, /* dst_mask */
928 TRUE), /* pcrel_offset */
930 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
931 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
933 2, /* size (0 = byte, 1 = short, 2 = long) */
935 FALSE, /* pc_relative */
937 complain_overflow_dont, /* complain_on_overflow */
938 bfd_elf_generic_reloc, /* special_function */
939 AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */
940 FALSE, /* partial_inplace */
941 0xfff, /* src_mask */
942 0xfff, /* dst_mask */
943 FALSE), /* pcrel_offset */
945 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
947 2, /* size (0 = byte, 1 = short, 2 = long) */
949 FALSE, /* pc_relative */
951 complain_overflow_dont, /* complain_on_overflow */
952 bfd_elf_generic_reloc, /* special_function */
953 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */
954 FALSE, /* partial_inplace */
955 0xffff, /* src_mask */
956 0xffff, /* dst_mask */
957 FALSE), /* pcrel_offset */
959 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
961 2, /* size (0 = byte, 1 = short, 2 = long) */
963 FALSE, /* pc_relative */
965 complain_overflow_dont, /* complain_on_overflow */
966 bfd_elf_generic_reloc, /* special_function */
967 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */
968 FALSE, /* partial_inplace */
969 0xffff, /* src_mask */
970 0xffff, /* dst_mask */
971 FALSE), /* pcrel_offset */
973 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
975 2, /* size (0 = byte, 1 = short, 2 = long) */
977 FALSE, /* pc_relative */
979 complain_overflow_dont, /* complain_on_overflow */
980 bfd_elf_generic_reloc, /* special_function */
981 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */
982 FALSE, /* partial_inplace */
983 0x1fffff, /* src_mask */
984 0x1fffff, /* dst_mask */
985 FALSE), /* pcrel_offset */
987 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
989 2, /* size (0 = byte, 1 = short, 2 = long) */
991 FALSE, /* pc_relative */
993 complain_overflow_dont, /* complain_on_overflow */
994 bfd_elf_generic_reloc, /* special_function */
995 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */
996 FALSE, /* partial_inplace */
997 0xff8, /* src_mask */
998 0xff8, /* dst_mask */
999 FALSE), /* pcrel_offset */
1001 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
1003 2, /* size (0 = byte, 1 = short, 2 = long) */
1005 FALSE, /* pc_relative */
1007 complain_overflow_dont, /* complain_on_overflow */
1008 bfd_elf_generic_reloc, /* special_function */
1009 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */
1010 FALSE, /* partial_inplace */
1011 0xffc, /* src_mask */
1012 0xffc, /* dst_mask */
1013 FALSE), /* pcrel_offset */
1015 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
1017 2, /* size (0 = byte, 1 = short, 2 = long) */
1019 FALSE, /* pc_relative */
1021 complain_overflow_dont, /* complain_on_overflow */
1022 bfd_elf_generic_reloc, /* special_function */
1023 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */
1024 FALSE, /* partial_inplace */
1025 0x1ffffc, /* src_mask */
1026 0x1ffffc, /* dst_mask */
1027 FALSE), /* pcrel_offset */
1029 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1030 HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC), /* type */
1032 2, /* size (0 = byte, 1 = short, 2 = long) */
1034 FALSE, /* pc_relative */
1036 complain_overflow_dont, /* complain_on_overflow */
1037 bfd_elf_generic_reloc, /* special_function */
1038 AARCH64_R_STR (TLSLD_ADD_LO12_NC), /* name */
1039 FALSE, /* partial_inplace */
1040 0xfff, /* src_mask */
1041 0xfff, /* dst_mask */
1042 FALSE), /* pcrel_offset */
1044 /* Get to the page for the GOT entry for the symbol
1045 (G(S) - P) using an ADRP instruction. */
1046 HOWTO (AARCH64_R (TLSLD_ADR_PAGE21), /* type */
1047 12, /* rightshift */
1048 2, /* size (0 = byte, 1 = short, 2 = long) */
1050 TRUE, /* pc_relative */
1052 complain_overflow_signed, /* complain_on_overflow */
1053 bfd_elf_generic_reloc, /* special_function */
1054 AARCH64_R_STR (TLSLD_ADR_PAGE21), /* name */
1055 FALSE, /* partial_inplace */
1056 0x1fffff, /* src_mask */
1057 0x1fffff, /* dst_mask */
1058 TRUE), /* pcrel_offset */
1060 HOWTO (AARCH64_R (TLSLD_ADR_PREL21), /* type */
1062 2, /* size (0 = byte, 1 = short, 2 = long) */
1064 TRUE, /* pc_relative */
1066 complain_overflow_signed, /* complain_on_overflow */
1067 bfd_elf_generic_reloc, /* special_function */
1068 AARCH64_R_STR (TLSLD_ADR_PREL21), /* name */
1069 FALSE, /* partial_inplace */
1070 0x1fffff, /* src_mask */
1071 0x1fffff, /* dst_mask */
1072 TRUE), /* pcrel_offset */
1074 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
1075 32, /* rightshift */
1076 2, /* size (0 = byte, 1 = short, 2 = long) */
1078 FALSE, /* pc_relative */
1080 complain_overflow_unsigned, /* complain_on_overflow */
1081 bfd_elf_generic_reloc, /* special_function */
1082 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */
1083 FALSE, /* partial_inplace */
1084 0xffff, /* src_mask */
1085 0xffff, /* dst_mask */
1086 FALSE), /* pcrel_offset */
1088 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
1089 16, /* rightshift */
1090 2, /* size (0 = byte, 1 = short, 2 = long) */
1092 FALSE, /* pc_relative */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 bfd_elf_generic_reloc, /* special_function */
1096 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */
1097 FALSE, /* partial_inplace */
1098 0xffff, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1102 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
1103 16, /* rightshift */
1104 2, /* size (0 = byte, 1 = short, 2 = long) */
1106 FALSE, /* pc_relative */
1108 complain_overflow_dont, /* complain_on_overflow */
1109 bfd_elf_generic_reloc, /* special_function */
1110 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */
1111 FALSE, /* partial_inplace */
1112 0xffff, /* src_mask */
1113 0xffff, /* dst_mask */
1114 FALSE), /* pcrel_offset */
1116 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
1118 2, /* size (0 = byte, 1 = short, 2 = long) */
1120 FALSE, /* pc_relative */
1122 complain_overflow_dont, /* complain_on_overflow */
1123 bfd_elf_generic_reloc, /* special_function */
1124 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */
1125 FALSE, /* partial_inplace */
1126 0xffff, /* src_mask */
1127 0xffff, /* dst_mask */
1128 FALSE), /* pcrel_offset */
1130 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
1132 2, /* size (0 = byte, 1 = short, 2 = long) */
1134 FALSE, /* pc_relative */
1136 complain_overflow_dont, /* complain_on_overflow */
1137 bfd_elf_generic_reloc, /* special_function */
1138 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */
1139 FALSE, /* partial_inplace */
1140 0xffff, /* src_mask */
1141 0xffff, /* dst_mask */
1142 FALSE), /* pcrel_offset */
1144 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
1145 12, /* rightshift */
1146 2, /* size (0 = byte, 1 = short, 2 = long) */
1148 FALSE, /* pc_relative */
1150 complain_overflow_unsigned, /* complain_on_overflow */
1151 bfd_elf_generic_reloc, /* special_function */
1152 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */
1153 FALSE, /* partial_inplace */
1154 0xfff, /* src_mask */
1155 0xfff, /* dst_mask */
1156 FALSE), /* pcrel_offset */
1158 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
1160 2, /* size (0 = byte, 1 = short, 2 = long) */
1162 FALSE, /* pc_relative */
1164 complain_overflow_unsigned, /* complain_on_overflow */
1165 bfd_elf_generic_reloc, /* special_function */
1166 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */
1167 FALSE, /* partial_inplace */
1168 0xfff, /* src_mask */
1169 0xfff, /* dst_mask */
1170 FALSE), /* pcrel_offset */
1172 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
1174 2, /* size (0 = byte, 1 = short, 2 = long) */
1176 FALSE, /* pc_relative */
1178 complain_overflow_dont, /* complain_on_overflow */
1179 bfd_elf_generic_reloc, /* special_function */
1180 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */
1181 FALSE, /* partial_inplace */
1182 0xfff, /* src_mask */
1183 0xfff, /* dst_mask */
1184 FALSE), /* pcrel_offset */
1186 HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
1188 2, /* size (0 = byte, 1 = short, 2 = long) */
1190 TRUE, /* pc_relative */
1192 complain_overflow_dont, /* complain_on_overflow */
1193 bfd_elf_generic_reloc, /* special_function */
1194 AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */
1195 FALSE, /* partial_inplace */
1196 0x0ffffe0, /* src_mask */
1197 0x0ffffe0, /* dst_mask */
1198 TRUE), /* pcrel_offset */
1200 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
1202 2, /* size (0 = byte, 1 = short, 2 = long) */
1204 TRUE, /* pc_relative */
1206 complain_overflow_dont, /* complain_on_overflow */
1207 bfd_elf_generic_reloc, /* special_function */
1208 AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */
1209 FALSE, /* partial_inplace */
1210 0x1fffff, /* src_mask */
1211 0x1fffff, /* dst_mask */
1212 TRUE), /* pcrel_offset */
1214 /* Get to the page for the GOT entry for the symbol
1215 (G(S) - P) using an ADRP instruction. */
1216 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */
1217 12, /* rightshift */
1218 2, /* size (0 = byte, 1 = short, 2 = long) */
1220 TRUE, /* pc_relative */
1222 complain_overflow_dont, /* complain_on_overflow */
1223 bfd_elf_generic_reloc, /* special_function */
1224 AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */
1225 FALSE, /* partial_inplace */
1226 0x1fffff, /* src_mask */
1227 0x1fffff, /* dst_mask */
1228 TRUE), /* pcrel_offset */
1230 /* LD64: GOT offset G(S) & 0xff8. */
1231 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */
1233 2, /* size (0 = byte, 1 = short, 2 = long) */
1235 FALSE, /* pc_relative */
1237 complain_overflow_dont, /* complain_on_overflow */
1238 bfd_elf_generic_reloc, /* special_function */
1239 AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */
1240 FALSE, /* partial_inplace */
1241 0xff8, /* src_mask */
1242 0xff8, /* dst_mask */
1243 FALSE), /* pcrel_offset */
1245 /* LD32: GOT offset G(S) & 0xffc. */
1246 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
1248 2, /* size (0 = byte, 1 = short, 2 = long) */
1250 FALSE, /* pc_relative */
1252 complain_overflow_dont, /* complain_on_overflow */
1253 bfd_elf_generic_reloc, /* special_function */
1254 AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */
1255 FALSE, /* partial_inplace */
1256 0xffc, /* src_mask */
1257 0xffc, /* dst_mask */
1258 FALSE), /* pcrel_offset */
1260 /* ADD: GOT offset G(S) & 0xfff. */
1261 HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */
1263 2, /* size (0 = byte, 1 = short, 2 = long) */
1265 FALSE, /* pc_relative */
1267 complain_overflow_dont, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */
1270 FALSE, /* partial_inplace */
1271 0xfff, /* src_mask */
1272 0xfff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1275 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
1276 16, /* rightshift */
1277 2, /* size (0 = byte, 1 = short, 2 = long) */
1279 FALSE, /* pc_relative */
1281 complain_overflow_dont, /* complain_on_overflow */
1282 bfd_elf_generic_reloc, /* special_function */
1283 AARCH64_R_STR (TLSDESC_OFF_G1), /* name */
1284 FALSE, /* partial_inplace */
1285 0xffff, /* src_mask */
1286 0xffff, /* dst_mask */
1287 FALSE), /* pcrel_offset */
1289 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1293 FALSE, /* pc_relative */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */
1298 FALSE, /* partial_inplace */
1299 0xffff, /* src_mask */
1300 0xffff, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1303 HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1307 FALSE, /* pc_relative */
1309 complain_overflow_dont, /* complain_on_overflow */
1310 bfd_elf_generic_reloc, /* special_function */
1311 AARCH64_R_STR (TLSDESC_LDR), /* name */
1312 FALSE, /* partial_inplace */
1315 FALSE), /* pcrel_offset */
1317 HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1321 FALSE, /* pc_relative */
1323 complain_overflow_dont, /* complain_on_overflow */
1324 bfd_elf_generic_reloc, /* special_function */
1325 AARCH64_R_STR (TLSDESC_ADD), /* name */
1326 FALSE, /* partial_inplace */
1329 FALSE), /* pcrel_offset */
1331 HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
1333 2, /* size (0 = byte, 1 = short, 2 = long) */
1335 FALSE, /* pc_relative */
1337 complain_overflow_dont, /* complain_on_overflow */
1338 bfd_elf_generic_reloc, /* special_function */
1339 AARCH64_R_STR (TLSDESC_CALL), /* name */
1340 FALSE, /* partial_inplace */
1343 FALSE), /* pcrel_offset */
1345 HOWTO (AARCH64_R (COPY), /* type */
1347 2, /* size (0 = byte, 1 = short, 2 = long) */
1349 FALSE, /* pc_relative */
1351 complain_overflow_bitfield, /* complain_on_overflow */
1352 bfd_elf_generic_reloc, /* special_function */
1353 AARCH64_R_STR (COPY), /* name */
1354 TRUE, /* partial_inplace */
1355 0xffffffff, /* src_mask */
1356 0xffffffff, /* dst_mask */
1357 FALSE), /* pcrel_offset */
1359 HOWTO (AARCH64_R (GLOB_DAT), /* type */
1361 2, /* size (0 = byte, 1 = short, 2 = long) */
1363 FALSE, /* pc_relative */
1365 complain_overflow_bitfield, /* complain_on_overflow */
1366 bfd_elf_generic_reloc, /* special_function */
1367 AARCH64_R_STR (GLOB_DAT), /* name */
1368 TRUE, /* partial_inplace */
1369 0xffffffff, /* src_mask */
1370 0xffffffff, /* dst_mask */
1371 FALSE), /* pcrel_offset */
1373 HOWTO (AARCH64_R (JUMP_SLOT), /* type */
1375 2, /* size (0 = byte, 1 = short, 2 = long) */
1377 FALSE, /* pc_relative */
1379 complain_overflow_bitfield, /* complain_on_overflow */
1380 bfd_elf_generic_reloc, /* special_function */
1381 AARCH64_R_STR (JUMP_SLOT), /* name */
1382 TRUE, /* partial_inplace */
1383 0xffffffff, /* src_mask */
1384 0xffffffff, /* dst_mask */
1385 FALSE), /* pcrel_offset */
1387 HOWTO (AARCH64_R (RELATIVE), /* type */
1389 2, /* size (0 = byte, 1 = short, 2 = long) */
1391 FALSE, /* pc_relative */
1393 complain_overflow_bitfield, /* complain_on_overflow */
1394 bfd_elf_generic_reloc, /* special_function */
1395 AARCH64_R_STR (RELATIVE), /* name */
1396 TRUE, /* partial_inplace */
1397 ALL_ONES, /* src_mask */
1398 ALL_ONES, /* dst_mask */
1399 FALSE), /* pcrel_offset */
1401 HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
1403 2, /* size (0 = byte, 1 = short, 2 = long) */
1405 FALSE, /* pc_relative */
1407 complain_overflow_dont, /* complain_on_overflow */
1408 bfd_elf_generic_reloc, /* special_function */
1410 AARCH64_R_STR (TLS_DTPMOD64), /* name */
1412 AARCH64_R_STR (TLS_DTPMOD), /* name */
1414 FALSE, /* partial_inplace */
1416 ALL_ONES, /* dst_mask */
1417 FALSE), /* pc_reloffset */
1419 HOWTO (AARCH64_R (TLS_DTPREL), /* type */
1421 2, /* size (0 = byte, 1 = short, 2 = long) */
1423 FALSE, /* pc_relative */
1425 complain_overflow_dont, /* complain_on_overflow */
1426 bfd_elf_generic_reloc, /* special_function */
1428 AARCH64_R_STR (TLS_DTPREL64), /* name */
1430 AARCH64_R_STR (TLS_DTPREL), /* name */
1432 FALSE, /* partial_inplace */
1434 ALL_ONES, /* dst_mask */
1435 FALSE), /* pcrel_offset */
1437 HOWTO (AARCH64_R (TLS_TPREL), /* type */
1439 2, /* size (0 = byte, 1 = short, 2 = long) */
1441 FALSE, /* pc_relative */
1443 complain_overflow_dont, /* complain_on_overflow */
1444 bfd_elf_generic_reloc, /* special_function */
1446 AARCH64_R_STR (TLS_TPREL64), /* name */
1448 AARCH64_R_STR (TLS_TPREL), /* name */
1450 FALSE, /* partial_inplace */
1452 ALL_ONES, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1455 HOWTO (AARCH64_R (TLSDESC), /* type */
1457 2, /* size (0 = byte, 1 = short, 2 = long) */
1459 FALSE, /* pc_relative */
1461 complain_overflow_dont, /* complain_on_overflow */
1462 bfd_elf_generic_reloc, /* special_function */
1463 AARCH64_R_STR (TLSDESC), /* name */
1464 FALSE, /* partial_inplace */
1466 ALL_ONES, /* dst_mask */
1467 FALSE), /* pcrel_offset */
1469 HOWTO (AARCH64_R (IRELATIVE), /* type */
1471 2, /* size (0 = byte, 1 = short, 2 = long) */
1473 FALSE, /* pc_relative */
1475 complain_overflow_bitfield, /* complain_on_overflow */
1476 bfd_elf_generic_reloc, /* special_function */
1477 AARCH64_R_STR (IRELATIVE), /* name */
1478 FALSE, /* partial_inplace */
1480 ALL_ONES, /* dst_mask */
1481 FALSE), /* pcrel_offset */
1486 static reloc_howto_type elfNN_aarch64_howto_none =
1487 HOWTO (R_AARCH64_NONE, /* type */
1489 3, /* size (0 = byte, 1 = short, 2 = long) */
1491 FALSE, /* pc_relative */
1493 complain_overflow_dont,/* complain_on_overflow */
1494 bfd_elf_generic_reloc, /* special_function */
1495 "R_AARCH64_NONE", /* name */
1496 FALSE, /* partial_inplace */
1499 FALSE); /* pcrel_offset */
1501 /* Given HOWTO, return the bfd internal relocation enumerator. */
1503 static bfd_reloc_code_real_type
1504 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
1507 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
1508 const ptrdiff_t offset
1509 = howto - elfNN_aarch64_howto_table;
1511 if (offset > 0 && offset < size - 1)
1512 return BFD_RELOC_AARCH64_RELOC_START + offset;
1514 if (howto == &elfNN_aarch64_howto_none)
1515 return BFD_RELOC_AARCH64_NONE;
1517 return BFD_RELOC_AARCH64_RELOC_START;
1520 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1522 static bfd_reloc_code_real_type
1523 elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type)
1525 static bfd_boolean initialized_p = FALSE;
1526 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1527 static unsigned int offsets[R_AARCH64_end];
1529 if (initialized_p == FALSE)
1533 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1534 if (elfNN_aarch64_howto_table[i].type != 0)
1535 offsets[elfNN_aarch64_howto_table[i].type] = i;
1537 initialized_p = TRUE;
1540 if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
1541 return BFD_RELOC_AARCH64_NONE;
1543 /* PR 17512: file: b371e70a. */
1544 if (r_type >= R_AARCH64_end)
1546 _bfd_error_handler (_("Invalid AArch64 reloc number: %d"), r_type);
1547 bfd_set_error (bfd_error_bad_value);
1548 return BFD_RELOC_AARCH64_NONE;
1551 return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
1554 struct elf_aarch64_reloc_map
1556 bfd_reloc_code_real_type from;
1557 bfd_reloc_code_real_type to;
1560 /* Map bfd generic reloc to AArch64-specific reloc. */
1561 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
1563 {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
1565 /* Basic data relocations. */
1566 {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN},
1567 {BFD_RELOC_64, BFD_RELOC_AARCH64_64},
1568 {BFD_RELOC_32, BFD_RELOC_AARCH64_32},
1569 {BFD_RELOC_16, BFD_RELOC_AARCH64_16},
1570 {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL},
1571 {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL},
1572 {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL},
1575 /* Given the bfd internal relocation enumerator in CODE, return the
1576 corresponding howto entry. */
1578 static reloc_howto_type *
1579 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
1583 /* Convert bfd generic reloc to AArch64-specific reloc. */
1584 if (code < BFD_RELOC_AARCH64_RELOC_START
1585 || code > BFD_RELOC_AARCH64_RELOC_END)
1586 for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++)
1587 if (elf_aarch64_reloc_map[i].from == code)
1589 code = elf_aarch64_reloc_map[i].to;
1593 if (code > BFD_RELOC_AARCH64_RELOC_START
1594 && code < BFD_RELOC_AARCH64_RELOC_END)
1595 if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type)
1596 return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START];
1598 if (code == BFD_RELOC_AARCH64_NONE)
1599 return &elfNN_aarch64_howto_none;
1604 static reloc_howto_type *
1605 elfNN_aarch64_howto_from_type (unsigned int r_type)
1607 bfd_reloc_code_real_type val;
1608 reloc_howto_type *howto;
1613 bfd_set_error (bfd_error_bad_value);
1618 if (r_type == R_AARCH64_NONE)
1619 return &elfNN_aarch64_howto_none;
1621 val = elfNN_aarch64_bfd_reloc_from_type (r_type);
1622 howto = elfNN_aarch64_howto_from_bfd_reloc (val);
1627 bfd_set_error (bfd_error_bad_value);
1632 elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
1633 Elf_Internal_Rela *elf_reloc)
1635 unsigned int r_type;
1637 r_type = ELFNN_R_TYPE (elf_reloc->r_info);
1638 bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type);
1641 static reloc_howto_type *
1642 elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1643 bfd_reloc_code_real_type code)
1645 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
1650 bfd_set_error (bfd_error_bad_value);
1654 static reloc_howto_type *
1655 elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1660 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1661 if (elfNN_aarch64_howto_table[i].name != NULL
1662 && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0)
1663 return &elfNN_aarch64_howto_table[i];
1668 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
1669 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
1670 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
1671 #define TARGET_BIG_NAME "elfNN-bigaarch64"
1673 /* The linker script knows the section names for placement.
1674 The entry_names are used to do simple name mangling on the stubs.
1675 Given a function name, and its type, the stub can be found. The
1676 name can be changed. The only requirement is the %s be present. */
1677 #define STUB_ENTRY_NAME "__%s_veneer"
1679 /* The name of the dynamic interpreter. This is put in the .interp
1681 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1683 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
1684 (((1 << 25) - 1) << 2)
1685 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
1688 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
1689 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
1692 aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
1694 bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12;
1695 return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM;
1699 aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
1701 bfd_signed_vma offset = (bfd_signed_vma) (value - place);
1702 return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET
1703 && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET);
1706 static const uint32_t aarch64_adrp_branch_stub [] =
1708 0x90000010, /* adrp ip0, X */
1709 /* R_AARCH64_ADR_HI21_PCREL(X) */
1710 0x91000210, /* add ip0, ip0, :lo12:X */
1711 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
1712 0xd61f0200, /* br ip0 */
1715 static const uint32_t aarch64_long_branch_stub[] =
1718 0x58000090, /* ldr ip0, 1f */
1720 0x18000090, /* ldr wip0, 1f */
1722 0x10000011, /* adr ip1, #0 */
1723 0x8b110210, /* add ip0, ip0, ip1 */
1724 0xd61f0200, /* br ip0 */
1725 0x00000000, /* 1: .xword or .word
1726 R_AARCH64_PRELNN(X) + 12
1731 static const uint32_t aarch64_erratum_835769_stub[] =
1733 0x00000000, /* Placeholder for multiply accumulate. */
1734 0x14000000, /* b <label> */
1737 static const uint32_t aarch64_erratum_843419_stub[] =
1739 0x00000000, /* Placeholder for LDR instruction. */
1740 0x14000000, /* b <label> */
1743 /* Section name for stubs is the associated section name plus this
1745 #define STUB_SUFFIX ".stub"
1747 enum elf_aarch64_stub_type
1750 aarch64_stub_adrp_branch,
1751 aarch64_stub_long_branch,
1752 aarch64_stub_erratum_835769_veneer,
1753 aarch64_stub_erratum_843419_veneer,
1756 struct elf_aarch64_stub_hash_entry
1758 /* Base hash table entry structure. */
1759 struct bfd_hash_entry root;
1761 /* The stub section. */
1764 /* Offset within stub_sec of the beginning of this stub. */
1765 bfd_vma stub_offset;
1767 /* Given the symbol's value and its section we can determine its final
1768 value when building the stubs (so the stub knows where to jump). */
1769 bfd_vma target_value;
1770 asection *target_section;
1772 enum elf_aarch64_stub_type stub_type;
1774 /* The symbol table entry, if any, that this was derived from. */
1775 struct elf_aarch64_link_hash_entry *h;
1777 /* Destination symbol type */
1778 unsigned char st_type;
1780 /* Where this stub is being called from, or, in the case of combined
1781 stub sections, the first input section in the group. */
1784 /* The name for the local symbol at the start of this stub. The
1785 stub name in the hash table has to be unique; this does not, so
1786 it can be friendlier. */
1789 /* The instruction which caused this stub to be generated (only valid for
1790 erratum 835769 workaround stubs at present). */
1791 uint32_t veneered_insn;
1793 /* In an erratum 843419 workaround stub, the ADRP instruction offset. */
1794 bfd_vma adrp_offset;
1797 /* Used to build a map of a section. This is required for mixed-endian
1800 typedef struct elf_elf_section_map
1805 elf_aarch64_section_map;
1808 typedef struct _aarch64_elf_section_data
1810 struct bfd_elf_section_data elf;
1811 unsigned int mapcount;
1812 unsigned int mapsize;
1813 elf_aarch64_section_map *map;
1815 _aarch64_elf_section_data;
1817 #define elf_aarch64_section_data(sec) \
1818 ((_aarch64_elf_section_data *) elf_section_data (sec))
1820 /* The size of the thread control block which is defined to be two pointers. */
1821 #define TCB_SIZE (ARCH_SIZE/8)*2
1823 struct elf_aarch64_local_symbol
1825 unsigned int got_type;
1826 bfd_signed_vma got_refcount;
1829 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
1830 offset is from the end of the jump table and reserved entries
1833 The magic value (bfd_vma) -1 indicates that an offset has not be
1835 bfd_vma tlsdesc_got_jump_table_offset;
1838 struct elf_aarch64_obj_tdata
1840 struct elf_obj_tdata root;
1842 /* local symbol descriptors */
1843 struct elf_aarch64_local_symbol *locals;
1845 /* Zero to warn when linking objects with incompatible enum sizes. */
1846 int no_enum_size_warning;
1848 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
1849 int no_wchar_size_warning;
1852 #define elf_aarch64_tdata(bfd) \
1853 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
1855 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
1857 #define is_aarch64_elf(bfd) \
1858 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1859 && elf_tdata (bfd) != NULL \
1860 && elf_object_id (bfd) == AARCH64_ELF_DATA)
1863 elfNN_aarch64_mkobject (bfd *abfd)
1865 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
1869 #define elf_aarch64_hash_entry(ent) \
1870 ((struct elf_aarch64_link_hash_entry *)(ent))
1872 #define GOT_UNKNOWN 0
1873 #define GOT_NORMAL 1
1874 #define GOT_TLS_GD 2
1875 #define GOT_TLS_IE 4
1876 #define GOT_TLSDESC_GD 8
1878 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
1880 /* AArch64 ELF linker hash entry. */
1881 struct elf_aarch64_link_hash_entry
1883 struct elf_link_hash_entry root;
1885 /* Track dynamic relocs copied for this symbol. */
1886 struct elf_dyn_relocs *dyn_relocs;
1888 /* Since PLT entries have variable size, we need to record the
1889 index into .got.plt instead of recomputing it from the PLT
1891 bfd_signed_vma plt_got_offset;
1893 /* Bit mask representing the type of GOT entry(s) if any required by
1895 unsigned int got_type;
1897 /* A pointer to the most recently used stub hash entry against this
1899 struct elf_aarch64_stub_hash_entry *stub_cache;
1901 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
1902 is from the end of the jump table and reserved entries within the PLTGOT.
1904 The magic value (bfd_vma) -1 indicates that an offset has not
1906 bfd_vma tlsdesc_got_jump_table_offset;
1910 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
1912 unsigned long r_symndx)
1915 return elf_aarch64_hash_entry (h)->got_type;
1917 if (! elf_aarch64_locals (abfd))
1920 return elf_aarch64_locals (abfd)[r_symndx].got_type;
1923 /* Get the AArch64 elf linker hash table from a link_info structure. */
1924 #define elf_aarch64_hash_table(info) \
1925 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
1927 #define aarch64_stub_hash_lookup(table, string, create, copy) \
1928 ((struct elf_aarch64_stub_hash_entry *) \
1929 bfd_hash_lookup ((table), (string), (create), (copy)))
1931 /* AArch64 ELF linker hash table. */
1932 struct elf_aarch64_link_hash_table
1934 /* The main hash table. */
1935 struct elf_link_hash_table root;
1937 /* Nonzero to force PIC branch veneers. */
1940 /* Fix erratum 835769. */
1941 int fix_erratum_835769;
1943 /* Fix erratum 843419. */
1944 int fix_erratum_843419;
1946 /* Enable ADRP->ADR rewrite for erratum 843419 workaround. */
1947 int fix_erratum_843419_adr;
1949 /* The number of bytes in the initial entry in the PLT. */
1950 bfd_size_type plt_header_size;
1952 /* The number of bytes in the subsequent PLT etries. */
1953 bfd_size_type plt_entry_size;
1955 /* Short-cuts to get to dynamic linker sections. */
1959 /* Small local sym cache. */
1960 struct sym_cache sym_cache;
1962 /* For convenience in allocate_dynrelocs. */
1965 /* The amount of space used by the reserved portion of the sgotplt
1966 section, plus whatever space is used by the jump slots. */
1967 bfd_vma sgotplt_jump_table_size;
1969 /* The stub hash table. */
1970 struct bfd_hash_table stub_hash_table;
1972 /* Linker stub bfd. */
1975 /* Linker call-backs. */
1976 asection *(*add_stub_section) (const char *, asection *);
1977 void (*layout_sections_again) (void);
1979 /* Array to keep track of which stub sections have been created, and
1980 information on stub grouping. */
1983 /* This is the section to which stubs in the group will be
1986 /* The stub section. */
1990 /* Assorted information used by elfNN_aarch64_size_stubs. */
1991 unsigned int bfd_count;
1993 asection **input_list;
1995 /* The offset into splt of the PLT entry for the TLS descriptor
1996 resolver. Special values are 0, if not necessary (or not found
1997 to be necessary yet), and -1 if needed but not determined
1999 bfd_vma tlsdesc_plt;
2001 /* The GOT offset for the lazy trampoline. Communicated to the
2002 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
2003 indicates an offset is not allocated. */
2004 bfd_vma dt_tlsdesc_got;
2006 /* Used by local STT_GNU_IFUNC symbols. */
2007 htab_t loc_hash_table;
2008 void * loc_hash_memory;
2011 /* Create an entry in an AArch64 ELF linker hash table. */
2013 static struct bfd_hash_entry *
2014 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
2015 struct bfd_hash_table *table,
2018 struct elf_aarch64_link_hash_entry *ret =
2019 (struct elf_aarch64_link_hash_entry *) entry;
2021 /* Allocate the structure if it has not already been allocated by a
2024 ret = bfd_hash_allocate (table,
2025 sizeof (struct elf_aarch64_link_hash_entry));
2027 return (struct bfd_hash_entry *) ret;
2029 /* Call the allocation method of the superclass. */
2030 ret = ((struct elf_aarch64_link_hash_entry *)
2031 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2035 ret->dyn_relocs = NULL;
2036 ret->got_type = GOT_UNKNOWN;
2037 ret->plt_got_offset = (bfd_vma) - 1;
2038 ret->stub_cache = NULL;
2039 ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
2042 return (struct bfd_hash_entry *) ret;
2045 /* Initialize an entry in the stub hash table. */
2047 static struct bfd_hash_entry *
2048 stub_hash_newfunc (struct bfd_hash_entry *entry,
2049 struct bfd_hash_table *table, const char *string)
2051 /* Allocate the structure if it has not already been allocated by a
2055 entry = bfd_hash_allocate (table,
2057 elf_aarch64_stub_hash_entry));
2062 /* Call the allocation method of the superclass. */
2063 entry = bfd_hash_newfunc (entry, table, string);
2066 struct elf_aarch64_stub_hash_entry *eh;
2068 /* Initialize the local fields. */
2069 eh = (struct elf_aarch64_stub_hash_entry *) entry;
2070 eh->adrp_offset = 0;
2071 eh->stub_sec = NULL;
2072 eh->stub_offset = 0;
2073 eh->target_value = 0;
2074 eh->target_section = NULL;
2075 eh->stub_type = aarch64_stub_none;
2083 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
2084 for local symbol so that we can handle local STT_GNU_IFUNC symbols
2085 as global symbol. We reuse indx and dynstr_index for local symbol
2086 hash since they aren't used by global symbols in this backend. */
2089 elfNN_aarch64_local_htab_hash (const void *ptr)
2091 struct elf_link_hash_entry *h
2092 = (struct elf_link_hash_entry *) ptr;
2093 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
2096 /* Compare local hash entries. */
2099 elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
2101 struct elf_link_hash_entry *h1
2102 = (struct elf_link_hash_entry *) ptr1;
2103 struct elf_link_hash_entry *h2
2104 = (struct elf_link_hash_entry *) ptr2;
2106 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
2109 /* Find and/or create a hash entry for local symbol. */
2111 static struct elf_link_hash_entry *
2112 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab,
2113 bfd *abfd, const Elf_Internal_Rela *rel,
2116 struct elf_aarch64_link_hash_entry e, *ret;
2117 asection *sec = abfd->sections;
2118 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
2119 ELFNN_R_SYM (rel->r_info));
2122 e.root.indx = sec->id;
2123 e.root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2124 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
2125 create ? INSERT : NO_INSERT);
2132 ret = (struct elf_aarch64_link_hash_entry *) *slot;
2136 ret = (struct elf_aarch64_link_hash_entry *)
2137 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
2138 sizeof (struct elf_aarch64_link_hash_entry));
2141 memset (ret, 0, sizeof (*ret));
2142 ret->root.indx = sec->id;
2143 ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2144 ret->root.dynindx = -1;
2150 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2153 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
2154 struct elf_link_hash_entry *dir,
2155 struct elf_link_hash_entry *ind)
2157 struct elf_aarch64_link_hash_entry *edir, *eind;
2159 edir = (struct elf_aarch64_link_hash_entry *) dir;
2160 eind = (struct elf_aarch64_link_hash_entry *) ind;
2162 if (eind->dyn_relocs != NULL)
2164 if (edir->dyn_relocs != NULL)
2166 struct elf_dyn_relocs **pp;
2167 struct elf_dyn_relocs *p;
2169 /* Add reloc counts against the indirect sym to the direct sym
2170 list. Merge any entries against the same section. */
2171 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2173 struct elf_dyn_relocs *q;
2175 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2176 if (q->sec == p->sec)
2178 q->pc_count += p->pc_count;
2179 q->count += p->count;
2186 *pp = edir->dyn_relocs;
2189 edir->dyn_relocs = eind->dyn_relocs;
2190 eind->dyn_relocs = NULL;
2193 if (ind->root.type == bfd_link_hash_indirect)
2195 /* Copy over PLT info. */
2196 if (dir->got.refcount <= 0)
2198 edir->got_type = eind->got_type;
2199 eind->got_type = GOT_UNKNOWN;
2203 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2206 /* Destroy an AArch64 elf linker hash table. */
2209 elfNN_aarch64_link_hash_table_free (bfd *obfd)
2211 struct elf_aarch64_link_hash_table *ret
2212 = (struct elf_aarch64_link_hash_table *) obfd->link.hash;
2214 if (ret->loc_hash_table)
2215 htab_delete (ret->loc_hash_table);
2216 if (ret->loc_hash_memory)
2217 objalloc_free ((struct objalloc *) ret->loc_hash_memory);
2219 bfd_hash_table_free (&ret->stub_hash_table);
2220 _bfd_elf_link_hash_table_free (obfd);
2223 /* Create an AArch64 elf linker hash table. */
2225 static struct bfd_link_hash_table *
2226 elfNN_aarch64_link_hash_table_create (bfd *abfd)
2228 struct elf_aarch64_link_hash_table *ret;
2229 bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
2231 ret = bfd_zmalloc (amt);
2235 if (!_bfd_elf_link_hash_table_init
2236 (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
2237 sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
2243 ret->plt_header_size = PLT_ENTRY_SIZE;
2244 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
2246 ret->dt_tlsdesc_got = (bfd_vma) - 1;
2248 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2249 sizeof (struct elf_aarch64_stub_hash_entry)))
2251 _bfd_elf_link_hash_table_free (abfd);
2255 ret->loc_hash_table = htab_try_create (1024,
2256 elfNN_aarch64_local_htab_hash,
2257 elfNN_aarch64_local_htab_eq,
2259 ret->loc_hash_memory = objalloc_create ();
2260 if (!ret->loc_hash_table || !ret->loc_hash_memory)
2262 elfNN_aarch64_link_hash_table_free (abfd);
2265 ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free;
2267 return &ret->root.root;
2271 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2272 bfd_vma offset, bfd_vma value)
2274 reloc_howto_type *howto;
2277 howto = elfNN_aarch64_howto_from_type (r_type);
2278 place = (input_section->output_section->vma + input_section->output_offset
2281 r_type = elfNN_aarch64_bfd_reloc_from_type (r_type);
2282 value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE);
2283 return _bfd_aarch64_elf_put_addend (input_bfd,
2284 input_section->contents + offset, r_type,
2288 static enum elf_aarch64_stub_type
2289 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2291 if (aarch64_valid_for_adrp_p (value, place))
2292 return aarch64_stub_adrp_branch;
2293 return aarch64_stub_long_branch;
2296 /* Determine the type of stub needed, if any, for a call. */
2298 static enum elf_aarch64_stub_type
2299 aarch64_type_of_stub (struct bfd_link_info *info,
2300 asection *input_sec,
2301 const Elf_Internal_Rela *rel,
2302 unsigned char st_type,
2303 struct elf_aarch64_link_hash_entry *hash,
2304 bfd_vma destination)
2307 bfd_signed_vma branch_offset;
2308 unsigned int r_type;
2309 struct elf_aarch64_link_hash_table *globals;
2310 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2311 bfd_boolean via_plt_p;
2313 if (st_type != STT_FUNC)
2316 globals = elf_aarch64_hash_table (info);
2317 via_plt_p = (globals->root.splt != NULL && hash != NULL
2318 && hash->root.plt.offset != (bfd_vma) - 1);
2323 /* Determine where the call point is. */
2324 location = (input_sec->output_offset
2325 + input_sec->output_section->vma + rel->r_offset);
2327 branch_offset = (bfd_signed_vma) (destination - location);
2329 r_type = ELFNN_R_TYPE (rel->r_info);
2331 /* We don't want to redirect any old unconditional jump in this way,
2332 only one which is being used for a sibcall, where it is
2333 acceptable for the IP0 and IP1 registers to be clobbered. */
2334 if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
2335 && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
2336 || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
2338 stub_type = aarch64_stub_long_branch;
2344 /* Build a name for an entry in the stub hash table. */
2347 elfNN_aarch64_stub_name (const asection *input_section,
2348 const asection *sym_sec,
2349 const struct elf_aarch64_link_hash_entry *hash,
2350 const Elf_Internal_Rela *rel)
2357 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
2358 stub_name = bfd_malloc (len);
2359 if (stub_name != NULL)
2360 snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
2361 (unsigned int) input_section->id,
2362 hash->root.root.root.string,
2367 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2368 stub_name = bfd_malloc (len);
2369 if (stub_name != NULL)
2370 snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
2371 (unsigned int) input_section->id,
2372 (unsigned int) sym_sec->id,
2373 (unsigned int) ELFNN_R_SYM (rel->r_info),
2380 /* Look up an entry in the stub hash. Stub entries are cached because
2381 creating the stub name takes a bit of time. */
2383 static struct elf_aarch64_stub_hash_entry *
2384 elfNN_aarch64_get_stub_entry (const asection *input_section,
2385 const asection *sym_sec,
2386 struct elf_link_hash_entry *hash,
2387 const Elf_Internal_Rela *rel,
2388 struct elf_aarch64_link_hash_table *htab)
2390 struct elf_aarch64_stub_hash_entry *stub_entry;
2391 struct elf_aarch64_link_hash_entry *h =
2392 (struct elf_aarch64_link_hash_entry *) hash;
2393 const asection *id_sec;
2395 if ((input_section->flags & SEC_CODE) == 0)
2398 /* If this input section is part of a group of sections sharing one
2399 stub section, then use the id of the first section in the group.
2400 Stub names need to include a section id, as there may well be
2401 more than one stub used to reach say, printf, and we need to
2402 distinguish between them. */
2403 id_sec = htab->stub_group[input_section->id].link_sec;
2405 if (h != NULL && h->stub_cache != NULL
2406 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
2408 stub_entry = h->stub_cache;
2414 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
2415 if (stub_name == NULL)
2418 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
2419 stub_name, FALSE, FALSE);
2421 h->stub_cache = stub_entry;
2430 /* Create a stub section. */
2433 _bfd_aarch64_create_stub_section (asection *section,
2434 struct elf_aarch64_link_hash_table *htab)
2440 namelen = strlen (section->name);
2441 len = namelen + sizeof (STUB_SUFFIX);
2442 s_name = bfd_alloc (htab->stub_bfd, len);
2446 memcpy (s_name, section->name, namelen);
2447 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2448 return (*htab->add_stub_section) (s_name, section);
2452 /* Find or create a stub section for a link section.
2454 Fix or create the stub section used to collect stubs attached to
2455 the specified link section. */
2458 _bfd_aarch64_get_stub_for_link_section (asection *link_section,
2459 struct elf_aarch64_link_hash_table *htab)
2461 if (htab->stub_group[link_section->id].stub_sec == NULL)
2462 htab->stub_group[link_section->id].stub_sec
2463 = _bfd_aarch64_create_stub_section (link_section, htab);
2464 return htab->stub_group[link_section->id].stub_sec;
2468 /* Find or create a stub section in the stub group for an input
2472 _bfd_aarch64_create_or_find_stub_sec (asection *section,
2473 struct elf_aarch64_link_hash_table *htab)
2475 asection *link_sec = htab->stub_group[section->id].link_sec;
2476 return _bfd_aarch64_get_stub_for_link_section (link_sec, htab);
2480 /* Add a new stub entry in the stub group associated with an input
2481 section to the stub hash. Not all fields of the new stub entry are
2484 static struct elf_aarch64_stub_hash_entry *
2485 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name,
2487 struct elf_aarch64_link_hash_table *htab)
2491 struct elf_aarch64_stub_hash_entry *stub_entry;
2493 link_sec = htab->stub_group[section->id].link_sec;
2494 stub_sec = _bfd_aarch64_create_or_find_stub_sec (section, htab);
2496 /* Enter this entry into the linker stub hash table. */
2497 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2499 if (stub_entry == NULL)
2501 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2502 section->owner, stub_name);
2506 stub_entry->stub_sec = stub_sec;
2507 stub_entry->stub_offset = 0;
2508 stub_entry->id_sec = link_sec;
2513 /* Add a new stub entry in the final stub section to the stub hash.
2514 Not all fields of the new stub entry are initialised. */
2516 static struct elf_aarch64_stub_hash_entry *
2517 _bfd_aarch64_add_stub_entry_after (const char *stub_name,
2518 asection *link_section,
2519 struct elf_aarch64_link_hash_table *htab)
2522 struct elf_aarch64_stub_hash_entry *stub_entry;
2524 stub_sec = _bfd_aarch64_get_stub_for_link_section (link_section, htab);
2525 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2527 if (stub_entry == NULL)
2529 (*_bfd_error_handler) (_("cannot create stub entry %s"), stub_name);
2533 stub_entry->stub_sec = stub_sec;
2534 stub_entry->stub_offset = 0;
2535 stub_entry->id_sec = link_section;
2542 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
2543 void *in_arg ATTRIBUTE_UNUSED)
2545 struct elf_aarch64_stub_hash_entry *stub_entry;
2550 bfd_vma veneered_insn_loc;
2551 bfd_vma veneer_entry_loc;
2552 bfd_signed_vma branch_offset = 0;
2553 unsigned int template_size;
2554 const uint32_t *template;
2557 /* Massage our args to the form they really have. */
2558 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2560 stub_sec = stub_entry->stub_sec;
2562 /* Make a note of the offset within the stubs for this entry. */
2563 stub_entry->stub_offset = stub_sec->size;
2564 loc = stub_sec->contents + stub_entry->stub_offset;
2566 stub_bfd = stub_sec->owner;
2568 /* This is the address of the stub destination. */
2569 sym_value = (stub_entry->target_value
2570 + stub_entry->target_section->output_offset
2571 + stub_entry->target_section->output_section->vma);
2573 if (stub_entry->stub_type == aarch64_stub_long_branch)
2575 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
2576 + stub_sec->output_offset);
2578 /* See if we can relax the stub. */
2579 if (aarch64_valid_for_adrp_p (sym_value, place))
2580 stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
2583 switch (stub_entry->stub_type)
2585 case aarch64_stub_adrp_branch:
2586 template = aarch64_adrp_branch_stub;
2587 template_size = sizeof (aarch64_adrp_branch_stub);
2589 case aarch64_stub_long_branch:
2590 template = aarch64_long_branch_stub;
2591 template_size = sizeof (aarch64_long_branch_stub);
2593 case aarch64_stub_erratum_835769_veneer:
2594 template = aarch64_erratum_835769_stub;
2595 template_size = sizeof (aarch64_erratum_835769_stub);
2597 case aarch64_stub_erratum_843419_veneer:
2598 template = aarch64_erratum_843419_stub;
2599 template_size = sizeof (aarch64_erratum_843419_stub);
2605 for (i = 0; i < (template_size / sizeof template[0]); i++)
2607 bfd_putl32 (template[i], loc);
2611 template_size = (template_size + 7) & ~7;
2612 stub_sec->size += template_size;
2614 switch (stub_entry->stub_type)
2616 case aarch64_stub_adrp_branch:
2617 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
2618 stub_entry->stub_offset, sym_value))
2619 /* The stub would not have been relaxed if the offset was out
2623 if (aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC), stub_bfd, stub_sec,
2624 stub_entry->stub_offset + 4, sym_value))
2628 case aarch64_stub_long_branch:
2629 /* We want the value relative to the address 12 bytes back from the
2631 if (aarch64_relocate (AARCH64_R (PRELNN), stub_bfd, stub_sec,
2632 stub_entry->stub_offset + 16, sym_value + 12))
2636 case aarch64_stub_erratum_835769_veneer:
2637 veneered_insn_loc = stub_entry->target_section->output_section->vma
2638 + stub_entry->target_section->output_offset
2639 + stub_entry->target_value;
2640 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
2641 + stub_entry->stub_sec->output_offset
2642 + stub_entry->stub_offset;
2643 branch_offset = veneered_insn_loc - veneer_entry_loc;
2644 branch_offset >>= 2;
2645 branch_offset &= 0x3ffffff;
2646 bfd_putl32 (stub_entry->veneered_insn,
2647 stub_sec->contents + stub_entry->stub_offset);
2648 bfd_putl32 (template[1] | branch_offset,
2649 stub_sec->contents + stub_entry->stub_offset + 4);
2652 case aarch64_stub_erratum_843419_veneer:
2653 if (aarch64_relocate (AARCH64_R (JUMP26), stub_bfd, stub_sec,
2654 stub_entry->stub_offset + 4, sym_value + 4))
2665 /* As above, but don't actually build the stub. Just bump offset so
2666 we know stub section sizes. */
2669 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
2670 void *in_arg ATTRIBUTE_UNUSED)
2672 struct elf_aarch64_stub_hash_entry *stub_entry;
2675 /* Massage our args to the form they really have. */
2676 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2678 switch (stub_entry->stub_type)
2680 case aarch64_stub_adrp_branch:
2681 size = sizeof (aarch64_adrp_branch_stub);
2683 case aarch64_stub_long_branch:
2684 size = sizeof (aarch64_long_branch_stub);
2686 case aarch64_stub_erratum_835769_veneer:
2687 size = sizeof (aarch64_erratum_835769_stub);
2689 case aarch64_stub_erratum_843419_veneer:
2690 size = sizeof (aarch64_erratum_843419_stub);
2696 size = (size + 7) & ~7;
2697 stub_entry->stub_sec->size += size;
2701 /* External entry points for sizing and building linker stubs. */
2703 /* Set up various things so that we can make a list of input sections
2704 for each output section included in the link. Returns -1 on error,
2705 0 when no stubs will be needed, and 1 on success. */
2708 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
2709 struct bfd_link_info *info)
2712 unsigned int bfd_count;
2713 int top_id, top_index;
2715 asection **input_list, **list;
2717 struct elf_aarch64_link_hash_table *htab =
2718 elf_aarch64_hash_table (info);
2720 if (!is_elf_hash_table (htab))
2723 /* Count the number of input BFDs and find the top input section id. */
2724 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2725 input_bfd != NULL; input_bfd = input_bfd->link.next)
2728 for (section = input_bfd->sections;
2729 section != NULL; section = section->next)
2731 if (top_id < section->id)
2732 top_id = section->id;
2735 htab->bfd_count = bfd_count;
2737 amt = sizeof (struct map_stub) * (top_id + 1);
2738 htab->stub_group = bfd_zmalloc (amt);
2739 if (htab->stub_group == NULL)
2742 /* We can't use output_bfd->section_count here to find the top output
2743 section index as some sections may have been removed, and
2744 _bfd_strip_section_from_output doesn't renumber the indices. */
2745 for (section = output_bfd->sections, top_index = 0;
2746 section != NULL; section = section->next)
2748 if (top_index < section->index)
2749 top_index = section->index;
2752 htab->top_index = top_index;
2753 amt = sizeof (asection *) * (top_index + 1);
2754 input_list = bfd_malloc (amt);
2755 htab->input_list = input_list;
2756 if (input_list == NULL)
2759 /* For sections we aren't interested in, mark their entries with a
2760 value we can check later. */
2761 list = input_list + top_index;
2763 *list = bfd_abs_section_ptr;
2764 while (list-- != input_list);
2766 for (section = output_bfd->sections;
2767 section != NULL; section = section->next)
2769 if ((section->flags & SEC_CODE) != 0)
2770 input_list[section->index] = NULL;
2776 /* Used by elfNN_aarch64_next_input_section and group_sections. */
2777 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2779 /* The linker repeatedly calls this function for each input section,
2780 in the order that input sections are linked into output sections.
2781 Build lists of input sections to determine groupings between which
2782 we may insert linker stubs. */
2785 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
2787 struct elf_aarch64_link_hash_table *htab =
2788 elf_aarch64_hash_table (info);
2790 if (isec->output_section->index <= htab->top_index)
2792 asection **list = htab->input_list + isec->output_section->index;
2794 if (*list != bfd_abs_section_ptr)
2796 /* Steal the link_sec pointer for our list. */
2797 /* This happens to make the list in reverse order,
2798 which is what we want. */
2799 PREV_SEC (isec) = *list;
2805 /* See whether we can group stub sections together. Grouping stub
2806 sections may result in fewer stubs. More importantly, we need to
2807 put all .init* and .fini* stubs at the beginning of the .init or
2808 .fini output sections respectively, because glibc splits the
2809 _init and _fini functions into multiple parts. Putting a stub in
2810 the middle of a function is not a good idea. */
2813 group_sections (struct elf_aarch64_link_hash_table *htab,
2814 bfd_size_type stub_group_size,
2815 bfd_boolean stubs_always_before_branch)
2817 asection **list = htab->input_list + htab->top_index;
2821 asection *tail = *list;
2823 if (tail == bfd_abs_section_ptr)
2826 while (tail != NULL)
2830 bfd_size_type total;
2834 while ((prev = PREV_SEC (curr)) != NULL
2835 && ((total += curr->output_offset - prev->output_offset)
2839 /* OK, the size from the start of CURR to the end is less
2840 than stub_group_size and thus can be handled by one stub
2841 section. (Or the tail section is itself larger than
2842 stub_group_size, in which case we may be toast.)
2843 We should really be keeping track of the total size of
2844 stubs added here, as stubs contribute to the final output
2848 prev = PREV_SEC (tail);
2849 /* Set up this stub group. */
2850 htab->stub_group[tail->id].link_sec = curr;
2852 while (tail != curr && (tail = prev) != NULL);
2854 /* But wait, there's more! Input sections up to stub_group_size
2855 bytes before the stub section can be handled by it too. */
2856 if (!stubs_always_before_branch)
2860 && ((total += tail->output_offset - prev->output_offset)
2864 prev = PREV_SEC (tail);
2865 htab->stub_group[tail->id].link_sec = curr;
2871 while (list-- != htab->input_list);
2873 free (htab->input_list);
2878 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
2880 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
2881 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
2882 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
2883 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
2884 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
2885 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
2887 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
2888 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
2889 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
2890 #define AARCH64_ZR 0x1f
2892 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
2893 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
2895 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
2896 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
2897 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
2898 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
2899 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
2900 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
2901 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
2902 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
2903 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
2904 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
2905 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
2906 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
2907 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
2908 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
2909 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
2910 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
2911 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
2912 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
2914 /* Classify an INSN if it is indeed a load/store.
2916 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
2918 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
2921 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned.
2926 aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2,
2927 bfd_boolean *pair, bfd_boolean *load)
2935 /* Bail out quickly if INSN doesn't fall into the the load-store
2937 if (!AARCH64_LDST (insn))
2942 if (AARCH64_LDST_EX (insn))
2944 *rt = AARCH64_RT (insn);
2946 if (AARCH64_BIT (insn, 21) == 1)
2949 *rt2 = AARCH64_RT2 (insn);
2951 *load = AARCH64_LD (insn);
2954 else if (AARCH64_LDST_NAP (insn)
2955 || AARCH64_LDSTP_PI (insn)
2956 || AARCH64_LDSTP_O (insn)
2957 || AARCH64_LDSTP_PRE (insn))
2960 *rt = AARCH64_RT (insn);
2961 *rt2 = AARCH64_RT2 (insn);
2962 *load = AARCH64_LD (insn);
2965 else if (AARCH64_LDST_PCREL (insn)
2966 || AARCH64_LDST_UI (insn)
2967 || AARCH64_LDST_PIIMM (insn)
2968 || AARCH64_LDST_U (insn)
2969 || AARCH64_LDST_PREIMM (insn)
2970 || AARCH64_LDST_RO (insn)
2971 || AARCH64_LDST_UIMM (insn))
2973 *rt = AARCH64_RT (insn);
2975 if (AARCH64_LDST_PCREL (insn))
2977 opc = AARCH64_BITS (insn, 22, 2);
2978 v = AARCH64_BIT (insn, 26);
2979 opc_v = opc | (v << 2);
2980 *load = (opc_v == 1 || opc_v == 2 || opc_v == 3
2981 || opc_v == 5 || opc_v == 7);
2984 else if (AARCH64_LDST_SIMD_M (insn)
2985 || AARCH64_LDST_SIMD_M_PI (insn))
2987 *rt = AARCH64_RT (insn);
2988 *load = AARCH64_BIT (insn, 22);
2989 opcode = (insn >> 12) & 0xf;
3016 else if (AARCH64_LDST_SIMD_S (insn)
3017 || AARCH64_LDST_SIMD_S_PI (insn))
3019 *rt = AARCH64_RT (insn);
3020 r = (insn >> 21) & 1;
3021 *load = AARCH64_BIT (insn, 22);
3022 opcode = (insn >> 13) & 0x7;
3034 *rt2 = *rt + (r == 0 ? 2 : 3);
3042 *rt2 = *rt + (r == 0 ? 2 : 3);
3054 /* Return TRUE if INSN is multiply-accumulate. */
3057 aarch64_mlxl_p (uint32_t insn)
3059 uint32_t op31 = AARCH64_OP31 (insn);
3061 if (AARCH64_MAC (insn)
3062 && (op31 == 0 || op31 == 1 || op31 == 5)
3063 /* Exclude MUL instructions which are encoded as a multiple accumulate
3065 && AARCH64_RA (insn) != AARCH64_ZR)
3071 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
3072 it is possible for a 64-bit multiply-accumulate instruction to generate an
3073 incorrect result. The details are quite complex and hard to
3074 determine statically, since branches in the code may exist in some
3075 circumstances, but all cases end with a memory (load, store, or
3076 prefetch) instruction followed immediately by the multiply-accumulate
3077 operation. We employ a linker patching technique, by moving the potentially
3078 affected multiply-accumulate instruction into a patch region and replacing
3079 the original instruction with a branch to the patch. This function checks
3080 if INSN_1 is the memory operation followed by a multiply-accumulate
3081 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
3082 if INSN_1 and INSN_2 are safe. */
3085 aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2)
3095 if (aarch64_mlxl_p (insn_2)
3096 && aarch64_mem_op_p (insn_1, &rt, &rt2, &pair, &load))
3098 /* Any SIMD memory op is independent of the subsequent MLA
3099 by definition of the erratum. */
3100 if (AARCH64_BIT (insn_1, 26))
3103 /* If not SIMD, check for integer memory ops and MLA relationship. */
3104 rn = AARCH64_RN (insn_2);
3105 ra = AARCH64_RA (insn_2);
3106 rm = AARCH64_RM (insn_2);
3108 /* If this is a load and there's a true(RAW) dependency, we are safe
3109 and this is not an erratum sequence. */
3111 (rt == rn || rt == rm || rt == ra
3112 || (pair && (rt2 == rn || rt2 == rm || rt2 == ra))))
3115 /* We conservatively put out stubs for all other cases (including
3123 /* Used to order a list of mapping symbols by address. */
3126 elf_aarch64_compare_mapping (const void *a, const void *b)
3128 const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a;
3129 const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b;
3131 if (amap->vma > bmap->vma)
3133 else if (amap->vma < bmap->vma)
3135 else if (amap->type > bmap->type)
3136 /* Ensure results do not depend on the host qsort for objects with
3137 multiple mapping symbols at the same address by sorting on type
3140 else if (amap->type < bmap->type)
3148 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes)
3150 char *stub_name = (char *) bfd_malloc
3151 (strlen ("__erratum_835769_veneer_") + 16);
3152 sprintf (stub_name,"__erratum_835769_veneer_%d", num_fixes);
3156 /* Scan for Cortex-A53 erratum 835769 sequence.
3158 Return TRUE else FALSE on abnormal termination. */
3161 _bfd_aarch64_erratum_835769_scan (bfd *input_bfd,
3162 struct bfd_link_info *info,
3163 unsigned int *num_fixes_p)
3166 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3167 unsigned int num_fixes = *num_fixes_p;
3172 for (section = input_bfd->sections;
3174 section = section->next)
3176 bfd_byte *contents = NULL;
3177 struct _aarch64_elf_section_data *sec_data;
3180 if (elf_section_type (section) != SHT_PROGBITS
3181 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
3182 || (section->flags & SEC_EXCLUDE) != 0
3183 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
3184 || (section->output_section == bfd_abs_section_ptr))
3187 if (elf_section_data (section)->this_hdr.contents != NULL)
3188 contents = elf_section_data (section)->this_hdr.contents;
3189 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
3192 sec_data = elf_aarch64_section_data (section);
3194 qsort (sec_data->map, sec_data->mapcount,
3195 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3197 for (span = 0; span < sec_data->mapcount; span++)
3199 unsigned int span_start = sec_data->map[span].vma;
3200 unsigned int span_end = ((span == sec_data->mapcount - 1)
3201 ? sec_data->map[0].vma + section->size
3202 : sec_data->map[span + 1].vma);
3204 char span_type = sec_data->map[span].type;
3206 if (span_type == 'd')
3209 for (i = span_start; i + 4 < span_end; i += 4)
3211 uint32_t insn_1 = bfd_getl32 (contents + i);
3212 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3214 if (aarch64_erratum_sequence (insn_1, insn_2))
3216 struct elf_aarch64_stub_hash_entry *stub_entry;
3217 char *stub_name = _bfd_aarch64_erratum_835769_stub_name (num_fixes);
3221 stub_entry = _bfd_aarch64_add_stub_entry_in_group (stub_name,
3227 stub_entry->stub_type = aarch64_stub_erratum_835769_veneer;
3228 stub_entry->target_section = section;
3229 stub_entry->target_value = i + 4;
3230 stub_entry->veneered_insn = insn_2;
3231 stub_entry->output_name = stub_name;
3236 if (elf_section_data (section)->this_hdr.contents == NULL)
3240 *num_fixes_p = num_fixes;
3246 /* Test if instruction INSN is ADRP. */
3249 _bfd_aarch64_adrp_p (uint32_t insn)
3251 return ((insn & 0x9f000000) == 0x90000000);
3255 /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */
3258 _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1, uint32_t insn_2,
3266 return (aarch64_mem_op_p (insn_2, &rt, &rt2, &pair, &load)
3269 && AARCH64_LDST_UIMM (insn_3)
3270 && AARCH64_RN (insn_3) == AARCH64_RD (insn_1));
3274 /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence.
3276 Return TRUE if section CONTENTS at offset I contains one of the
3277 erratum 843419 sequences, otherwise return FALSE. If a sequence is
3278 seen set P_VENEER_I to the offset of the final LOAD/STORE
3279 instruction in the sequence.
3283 _bfd_aarch64_erratum_843419_p (bfd_byte *contents, bfd_vma vma,
3284 bfd_vma i, bfd_vma span_end,
3285 bfd_vma *p_veneer_i)
3287 uint32_t insn_1 = bfd_getl32 (contents + i);
3289 if (!_bfd_aarch64_adrp_p (insn_1))
3292 if (span_end < i + 12)
3295 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3296 uint32_t insn_3 = bfd_getl32 (contents + i + 8);
3298 if ((vma & 0xfff) != 0xff8 && (vma & 0xfff) != 0xffc)
3301 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_3))
3303 *p_veneer_i = i + 8;
3307 if (span_end < i + 16)
3310 uint32_t insn_4 = bfd_getl32 (contents + i + 12);
3312 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_4))
3314 *p_veneer_i = i + 12;
3322 /* Resize all stub sections. */
3325 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table *htab)
3329 /* OK, we've added some stubs. Find out the new size of the
3331 for (section = htab->stub_bfd->sections;
3332 section != NULL; section = section->next)
3334 /* Ignore non-stub sections. */
3335 if (!strstr (section->name, STUB_SUFFIX))
3340 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
3342 for (section = htab->stub_bfd->sections;
3343 section != NULL; section = section->next)
3345 if (!strstr (section->name, STUB_SUFFIX))
3351 /* Ensure all stub sections have a size which is a multiple of
3352 4096. This is important in order to ensure that the insertion
3353 of stub sections does not in itself move existing code around
3354 in such a way that new errata sequences are created. */
3355 if (htab->fix_erratum_843419)
3357 section->size = BFD_ALIGN (section->size, 0x1000);
3362 /* Construct an erratum 843419 workaround stub name.
3366 _bfd_aarch64_erratum_843419_stub_name (asection *input_section,
3369 const bfd_size_type len = 8 + 4 + 1 + 8 + 1 + 16 + 1;
3370 char *stub_name = bfd_malloc (len);
3372 if (stub_name != NULL)
3373 snprintf (stub_name, len, "e843419@%04x_%08x_%" BFD_VMA_FMT "x",
3374 input_section->owner->id,
3380 /* Build a stub_entry structure describing an 843419 fixup.
3382 The stub_entry constructed is populated with the bit pattern INSN
3383 of the instruction located at OFFSET within input SECTION.
3385 Returns TRUE on success. */
3388 _bfd_aarch64_erratum_843419_fixup (uint32_t insn,
3389 bfd_vma adrp_offset,
3390 bfd_vma ldst_offset,
3392 struct bfd_link_info *info)
3394 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3396 struct elf_aarch64_stub_hash_entry *stub_entry;
3398 stub_name = _bfd_aarch64_erratum_843419_stub_name (section, ldst_offset);
3399 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3407 /* We always place an 843419 workaround veneer in the stub section
3408 attached to the input section in which an erratum sequence has
3409 been found. This ensures that later in the link process (in
3410 elfNN_aarch64_write_section) when we copy the veneered
3411 instruction from the input section into the stub section the
3412 copied instruction will have had any relocations applied to it.
3413 If we placed workaround veneers in any other stub section then we
3414 could not assume that all relocations have been processed on the
3415 corresponding input section at the point we output the stub
3419 stub_entry = _bfd_aarch64_add_stub_entry_after (stub_name, section, htab);
3420 if (stub_entry == NULL)
3426 stub_entry->adrp_offset = adrp_offset;
3427 stub_entry->target_value = ldst_offset;
3428 stub_entry->target_section = section;
3429 stub_entry->stub_type = aarch64_stub_erratum_843419_veneer;
3430 stub_entry->veneered_insn = insn;
3431 stub_entry->output_name = stub_name;
3437 /* Scan an input section looking for the signature of erratum 843419.
3439 Scans input SECTION in INPUT_BFD looking for erratum 843419
3440 signatures, for each signature found a stub_entry is created
3441 describing the location of the erratum for subsequent fixup.
3443 Return TRUE on successful scan, FALSE on failure to scan.
3447 _bfd_aarch64_erratum_843419_scan (bfd *input_bfd, asection *section,
3448 struct bfd_link_info *info)
3450 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3455 if (elf_section_type (section) != SHT_PROGBITS
3456 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
3457 || (section->flags & SEC_EXCLUDE) != 0
3458 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
3459 || (section->output_section == bfd_abs_section_ptr))
3464 bfd_byte *contents = NULL;
3465 struct _aarch64_elf_section_data *sec_data;
3468 if (elf_section_data (section)->this_hdr.contents != NULL)
3469 contents = elf_section_data (section)->this_hdr.contents;
3470 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
3473 sec_data = elf_aarch64_section_data (section);
3475 qsort (sec_data->map, sec_data->mapcount,
3476 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3478 for (span = 0; span < sec_data->mapcount; span++)
3480 unsigned int span_start = sec_data->map[span].vma;
3481 unsigned int span_end = ((span == sec_data->mapcount - 1)
3482 ? sec_data->map[0].vma + section->size
3483 : sec_data->map[span + 1].vma);
3485 char span_type = sec_data->map[span].type;
3487 if (span_type == 'd')
3490 for (i = span_start; i + 8 < span_end; i += 4)
3492 bfd_vma vma = (section->output_section->vma
3493 + section->output_offset
3497 if (_bfd_aarch64_erratum_843419_p
3498 (contents, vma, i, span_end, &veneer_i))
3500 uint32_t insn = bfd_getl32 (contents + veneer_i);
3502 if (!_bfd_aarch64_erratum_843419_fixup (insn, i, veneer_i,
3509 if (elf_section_data (section)->this_hdr.contents == NULL)
3518 /* Determine and set the size of the stub section for a final link.
3520 The basic idea here is to examine all the relocations looking for
3521 PC-relative calls to a target that is unreachable with a "bl"
3525 elfNN_aarch64_size_stubs (bfd *output_bfd,
3527 struct bfd_link_info *info,
3528 bfd_signed_vma group_size,
3529 asection * (*add_stub_section) (const char *,
3531 void (*layout_sections_again) (void))
3533 bfd_size_type stub_group_size;
3534 bfd_boolean stubs_always_before_branch;
3535 bfd_boolean stub_changed = FALSE;
3536 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3537 unsigned int num_erratum_835769_fixes = 0;
3539 /* Propagate mach to stub bfd, because it may not have been
3540 finalized when we created stub_bfd. */
3541 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3542 bfd_get_mach (output_bfd));
3544 /* Stash our params away. */
3545 htab->stub_bfd = stub_bfd;
3546 htab->add_stub_section = add_stub_section;
3547 htab->layout_sections_again = layout_sections_again;
3548 stubs_always_before_branch = group_size < 0;
3550 stub_group_size = -group_size;
3552 stub_group_size = group_size;
3554 if (stub_group_size == 1)
3556 /* Default values. */
3557 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
3558 stub_group_size = 127 * 1024 * 1024;
3561 group_sections (htab, stub_group_size, stubs_always_before_branch);
3563 (*htab->layout_sections_again) ();
3565 if (htab->fix_erratum_835769)
3569 for (input_bfd = info->input_bfds;
3570 input_bfd != NULL; input_bfd = input_bfd->link.next)
3571 if (!_bfd_aarch64_erratum_835769_scan (input_bfd, info,
3572 &num_erratum_835769_fixes))
3575 _bfd_aarch64_resize_stubs (htab);
3576 (*htab->layout_sections_again) ();
3579 if (htab->fix_erratum_843419)
3583 for (input_bfd = info->input_bfds;
3585 input_bfd = input_bfd->link.next)
3589 for (section = input_bfd->sections;
3591 section = section->next)
3592 if (!_bfd_aarch64_erratum_843419_scan (input_bfd, section, info))
3596 _bfd_aarch64_resize_stubs (htab);
3597 (*htab->layout_sections_again) ();
3604 for (input_bfd = info->input_bfds;
3605 input_bfd != NULL; input_bfd = input_bfd->link.next)
3607 Elf_Internal_Shdr *symtab_hdr;
3609 Elf_Internal_Sym *local_syms = NULL;
3611 /* We'll need the symbol table in a second. */
3612 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3613 if (symtab_hdr->sh_info == 0)
3616 /* Walk over each section attached to the input bfd. */
3617 for (section = input_bfd->sections;
3618 section != NULL; section = section->next)
3620 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3622 /* If there aren't any relocs, then there's nothing more
3624 if ((section->flags & SEC_RELOC) == 0
3625 || section->reloc_count == 0
3626 || (section->flags & SEC_CODE) == 0)
3629 /* If this section is a link-once section that will be
3630 discarded, then don't create any stubs. */
3631 if (section->output_section == NULL
3632 || section->output_section->owner != output_bfd)
3635 /* Get the relocs. */
3637 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3638 NULL, info->keep_memory);
3639 if (internal_relocs == NULL)
3640 goto error_ret_free_local;
3642 /* Now examine each relocation. */
3643 irela = internal_relocs;
3644 irelaend = irela + section->reloc_count;
3645 for (; irela < irelaend; irela++)
3647 unsigned int r_type, r_indx;
3648 enum elf_aarch64_stub_type stub_type;
3649 struct elf_aarch64_stub_hash_entry *stub_entry;
3652 bfd_vma destination;
3653 struct elf_aarch64_link_hash_entry *hash;
3654 const char *sym_name;
3656 const asection *id_sec;
3657 unsigned char st_type;
3660 r_type = ELFNN_R_TYPE (irela->r_info);
3661 r_indx = ELFNN_R_SYM (irela->r_info);
3663 if (r_type >= (unsigned int) R_AARCH64_end)
3665 bfd_set_error (bfd_error_bad_value);
3666 error_ret_free_internal:
3667 if (elf_section_data (section)->relocs == NULL)
3668 free (internal_relocs);
3669 goto error_ret_free_local;
3672 /* Only look for stubs on unconditional branch and
3673 branch and link instructions. */
3674 if (r_type != (unsigned int) AARCH64_R (CALL26)
3675 && r_type != (unsigned int) AARCH64_R (JUMP26))
3678 /* Now determine the call target, its name, value,
3685 if (r_indx < symtab_hdr->sh_info)
3687 /* It's a local symbol. */
3688 Elf_Internal_Sym *sym;
3689 Elf_Internal_Shdr *hdr;
3691 if (local_syms == NULL)
3694 = (Elf_Internal_Sym *) symtab_hdr->contents;
3695 if (local_syms == NULL)
3697 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3698 symtab_hdr->sh_info, 0,
3700 if (local_syms == NULL)
3701 goto error_ret_free_internal;
3704 sym = local_syms + r_indx;
3705 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3706 sym_sec = hdr->bfd_section;
3708 /* This is an undefined symbol. It can never
3712 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3713 sym_value = sym->st_value;
3714 destination = (sym_value + irela->r_addend
3715 + sym_sec->output_offset
3716 + sym_sec->output_section->vma);
3717 st_type = ELF_ST_TYPE (sym->st_info);
3719 = bfd_elf_string_from_elf_section (input_bfd,
3720 symtab_hdr->sh_link,
3727 e_indx = r_indx - symtab_hdr->sh_info;
3728 hash = ((struct elf_aarch64_link_hash_entry *)
3729 elf_sym_hashes (input_bfd)[e_indx]);
3731 while (hash->root.root.type == bfd_link_hash_indirect
3732 || hash->root.root.type == bfd_link_hash_warning)
3733 hash = ((struct elf_aarch64_link_hash_entry *)
3734 hash->root.root.u.i.link);
3736 if (hash->root.root.type == bfd_link_hash_defined
3737 || hash->root.root.type == bfd_link_hash_defweak)
3739 struct elf_aarch64_link_hash_table *globals =
3740 elf_aarch64_hash_table (info);
3741 sym_sec = hash->root.root.u.def.section;
3742 sym_value = hash->root.root.u.def.value;
3743 /* For a destination in a shared library,
3744 use the PLT stub as target address to
3745 decide whether a branch stub is
3747 if (globals->root.splt != NULL && hash != NULL
3748 && hash->root.plt.offset != (bfd_vma) - 1)
3750 sym_sec = globals->root.splt;
3751 sym_value = hash->root.plt.offset;
3752 if (sym_sec->output_section != NULL)
3753 destination = (sym_value
3754 + sym_sec->output_offset
3756 sym_sec->output_section->vma);
3758 else if (sym_sec->output_section != NULL)
3759 destination = (sym_value + irela->r_addend
3760 + sym_sec->output_offset
3761 + sym_sec->output_section->vma);
3763 else if (hash->root.root.type == bfd_link_hash_undefined
3764 || (hash->root.root.type
3765 == bfd_link_hash_undefweak))
3767 /* For a shared library, use the PLT stub as
3768 target address to decide whether a long
3769 branch stub is needed.
3770 For absolute code, they cannot be handled. */
3771 struct elf_aarch64_link_hash_table *globals =
3772 elf_aarch64_hash_table (info);
3774 if (globals->root.splt != NULL && hash != NULL
3775 && hash->root.plt.offset != (bfd_vma) - 1)
3777 sym_sec = globals->root.splt;
3778 sym_value = hash->root.plt.offset;
3779 if (sym_sec->output_section != NULL)
3780 destination = (sym_value
3781 + sym_sec->output_offset
3783 sym_sec->output_section->vma);
3790 bfd_set_error (bfd_error_bad_value);
3791 goto error_ret_free_internal;
3793 st_type = ELF_ST_TYPE (hash->root.type);
3794 sym_name = hash->root.root.root.string;
3797 /* Determine what (if any) linker stub is needed. */
3798 stub_type = aarch64_type_of_stub
3799 (info, section, irela, st_type, hash, destination);
3800 if (stub_type == aarch64_stub_none)
3803 /* Support for grouping stub sections. */
3804 id_sec = htab->stub_group[section->id].link_sec;
3806 /* Get the name of this stub. */
3807 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
3810 goto error_ret_free_internal;
3813 aarch64_stub_hash_lookup (&htab->stub_hash_table,
3814 stub_name, FALSE, FALSE);
3815 if (stub_entry != NULL)
3817 /* The proper stub has already been created. */
3822 stub_entry = _bfd_aarch64_add_stub_entry_in_group
3823 (stub_name, section, htab);
3824 if (stub_entry == NULL)
3827 goto error_ret_free_internal;
3830 stub_entry->target_value = sym_value;
3831 stub_entry->target_section = sym_sec;
3832 stub_entry->stub_type = stub_type;
3833 stub_entry->h = hash;
3834 stub_entry->st_type = st_type;
3836 if (sym_name == NULL)
3837 sym_name = "unnamed";
3838 len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
3839 stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
3840 if (stub_entry->output_name == NULL)
3843 goto error_ret_free_internal;
3846 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
3849 stub_changed = TRUE;
3852 /* We're done with the internal relocs, free them. */
3853 if (elf_section_data (section)->relocs == NULL)
3854 free (internal_relocs);
3861 _bfd_aarch64_resize_stubs (htab);
3863 /* Ask the linker to do its stuff. */
3864 (*htab->layout_sections_again) ();
3865 stub_changed = FALSE;
3870 error_ret_free_local:
3874 /* Build all the stubs associated with the current output file. The
3875 stubs are kept in a hash table attached to the main linker hash
3876 table. We also set up the .plt entries for statically linked PIC
3877 functions here. This function is called via aarch64_elf_finish in the
3881 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
3884 struct bfd_hash_table *table;
3885 struct elf_aarch64_link_hash_table *htab;
3887 htab = elf_aarch64_hash_table (info);
3889 for (stub_sec = htab->stub_bfd->sections;
3890 stub_sec != NULL; stub_sec = stub_sec->next)
3894 /* Ignore non-stub sections. */
3895 if (!strstr (stub_sec->name, STUB_SUFFIX))
3898 /* Allocate memory to hold the linker stubs. */
3899 size = stub_sec->size;
3900 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
3901 if (stub_sec->contents == NULL && size != 0)
3905 bfd_putl32 (0x14000000 | (size >> 2), stub_sec->contents);
3906 stub_sec->size += 4;
3909 /* Build the stubs as directed by the stub hash table. */
3910 table = &htab->stub_hash_table;
3911 bfd_hash_traverse (table, aarch64_build_one_stub, info);
3917 /* Add an entry to the code/data map for section SEC. */
3920 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
3922 struct _aarch64_elf_section_data *sec_data =
3923 elf_aarch64_section_data (sec);
3924 unsigned int newidx;
3926 if (sec_data->map == NULL)
3928 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
3929 sec_data->mapcount = 0;
3930 sec_data->mapsize = 1;
3933 newidx = sec_data->mapcount++;
3935 if (sec_data->mapcount > sec_data->mapsize)
3937 sec_data->mapsize *= 2;
3938 sec_data->map = bfd_realloc_or_free
3939 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
3944 sec_data->map[newidx].vma = vma;
3945 sec_data->map[newidx].type = type;
3950 /* Initialise maps of insn/data for input BFDs. */
3952 bfd_elfNN_aarch64_init_maps (bfd *abfd)
3954 Elf_Internal_Sym *isymbuf;
3955 Elf_Internal_Shdr *hdr;
3956 unsigned int i, localsyms;
3958 /* Make sure that we are dealing with an AArch64 elf binary. */
3959 if (!is_aarch64_elf (abfd))
3962 if ((abfd->flags & DYNAMIC) != 0)
3965 hdr = &elf_symtab_hdr (abfd);
3966 localsyms = hdr->sh_info;
3968 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3969 should contain the number of local symbols, which should come before any
3970 global symbols. Mapping symbols are always local. */
3971 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
3973 /* No internal symbols read? Skip this BFD. */
3974 if (isymbuf == NULL)
3977 for (i = 0; i < localsyms; i++)
3979 Elf_Internal_Sym *isym = &isymbuf[i];
3980 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3983 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
3985 name = bfd_elf_string_from_elf_section (abfd,
3989 if (bfd_is_aarch64_special_symbol_name
3990 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
3991 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
3996 /* Set option values needed during linking. */
3998 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
3999 struct bfd_link_info *link_info,
4001 int no_wchar_warn, int pic_veneer,
4002 int fix_erratum_835769,
4003 int fix_erratum_843419)
4005 struct elf_aarch64_link_hash_table *globals;
4007 globals = elf_aarch64_hash_table (link_info);
4008 globals->pic_veneer = pic_veneer;
4009 globals->fix_erratum_835769 = fix_erratum_835769;
4010 globals->fix_erratum_843419 = fix_erratum_843419;
4011 globals->fix_erratum_843419_adr = TRUE;
4013 BFD_ASSERT (is_aarch64_elf (output_bfd));
4014 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
4015 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
4019 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
4020 struct elf_aarch64_link_hash_table
4021 *globals, struct bfd_link_info *info,
4022 bfd_vma value, bfd *output_bfd,
4023 bfd_boolean *unresolved_reloc_p)
4025 bfd_vma off = (bfd_vma) - 1;
4026 asection *basegot = globals->root.sgot;
4027 bfd_boolean dyn = globals->root.dynamic_sections_created;
4031 BFD_ASSERT (basegot != NULL);
4032 off = h->got.offset;
4033 BFD_ASSERT (off != (bfd_vma) - 1);
4034 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
4036 && SYMBOL_REFERENCES_LOCAL (info, h))
4037 || (ELF_ST_VISIBILITY (h->other)
4038 && h->root.type == bfd_link_hash_undefweak))
4040 /* This is actually a static link, or it is a -Bsymbolic link
4041 and the symbol is defined locally. We must initialize this
4042 entry in the global offset table. Since the offset must
4043 always be a multiple of 8 (4 in the case of ILP32), we use
4044 the least significant bit to record whether we have
4045 initialized it already.
4046 When doing a dynamic link, we create a .rel(a).got relocation
4047 entry to initialize the value. This is done in the
4048 finish_dynamic_symbol routine. */
4053 bfd_put_NN (output_bfd, value, basegot->contents + off);
4058 *unresolved_reloc_p = FALSE;
4060 off = off + basegot->output_section->vma + basegot->output_offset;
4066 /* Change R_TYPE to a more efficient access model where possible,
4067 return the new reloc type. */
4069 static bfd_reloc_code_real_type
4070 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
4071 struct elf_link_hash_entry *h)
4073 bfd_boolean is_local = h == NULL;
4077 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4078 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4080 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4081 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
4083 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4085 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4088 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4090 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4091 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4093 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4094 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4096 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4097 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
4099 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4100 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
4102 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4103 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
4105 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4108 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4110 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
4111 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4113 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4114 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4115 /* Instructions with these relocations will become NOPs. */
4116 return BFD_RELOC_AARCH64_NONE;
4126 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
4130 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4131 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4132 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4133 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4134 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4135 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4138 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4139 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4140 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4141 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
4142 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
4145 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4146 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4147 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4148 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4149 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4150 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
4151 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4152 return GOT_TLSDESC_GD;
4154 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4155 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4156 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4157 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4160 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4161 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4162 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4163 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4164 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4165 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4166 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4167 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4177 aarch64_can_relax_tls (bfd *input_bfd,
4178 struct bfd_link_info *info,
4179 bfd_reloc_code_real_type r_type,
4180 struct elf_link_hash_entry *h,
4181 unsigned long r_symndx)
4183 unsigned int symbol_got_type;
4184 unsigned int reloc_got_type;
4186 if (! IS_AARCH64_TLS_RELOC (r_type))
4189 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
4190 reloc_got_type = aarch64_reloc_got_type (r_type);
4192 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
4198 if (h && h->root.type == bfd_link_hash_undefweak)
4204 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
4207 static bfd_reloc_code_real_type
4208 aarch64_tls_transition (bfd *input_bfd,
4209 struct bfd_link_info *info,
4210 unsigned int r_type,
4211 struct elf_link_hash_entry *h,
4212 unsigned long r_symndx)
4214 bfd_reloc_code_real_type bfd_r_type
4215 = elfNN_aarch64_bfd_reloc_from_type (r_type);
4217 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
4220 return aarch64_tls_transition_without_check (bfd_r_type, h);
4223 /* Return the base VMA address which should be subtracted from real addresses
4224 when resolving R_AARCH64_TLS_DTPREL relocation. */
4227 dtpoff_base (struct bfd_link_info *info)
4229 /* If tls_sec is NULL, we should have signalled an error already. */
4230 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4231 return elf_hash_table (info)->tls_sec->vma;
4234 /* Return the base VMA address which should be subtracted from real addresses
4235 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
4238 tpoff_base (struct bfd_link_info *info)
4240 struct elf_link_hash_table *htab = elf_hash_table (info);
4242 /* If tls_sec is NULL, we should have signalled an error already. */
4243 BFD_ASSERT (htab->tls_sec != NULL);
4245 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
4246 htab->tls_sec->alignment_power);
4247 return htab->tls_sec->vma - base;
4251 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
4252 unsigned long r_symndx)
4254 /* Calculate the address of the GOT entry for symbol
4255 referred to in h. */
4257 return &h->got.offset;
4261 struct elf_aarch64_local_symbol *l;
4263 l = elf_aarch64_locals (input_bfd);
4264 return &l[r_symndx].got_offset;
4269 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
4270 unsigned long r_symndx)
4273 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
4278 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
4279 unsigned long r_symndx)
4282 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
4287 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
4288 unsigned long r_symndx)
4291 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
4297 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
4298 unsigned long r_symndx)
4300 /* Calculate the address of the GOT entry for symbol
4301 referred to in h. */
4304 struct elf_aarch64_link_hash_entry *eh;
4305 eh = (struct elf_aarch64_link_hash_entry *) h;
4306 return &eh->tlsdesc_got_jump_table_offset;
4311 struct elf_aarch64_local_symbol *l;
4313 l = elf_aarch64_locals (input_bfd);
4314 return &l[r_symndx].tlsdesc_got_jump_table_offset;
4319 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
4320 unsigned long r_symndx)
4323 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4328 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
4329 struct elf_link_hash_entry *h,
4330 unsigned long r_symndx)
4333 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4338 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
4339 unsigned long r_symndx)
4342 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4347 /* Data for make_branch_to_erratum_835769_stub(). */
4349 struct erratum_835769_branch_to_stub_data
4351 struct bfd_link_info *info;
4352 asection *output_section;
4356 /* Helper to insert branches to erratum 835769 stubs in the right
4357 places for a particular section. */
4360 make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry,
4363 struct elf_aarch64_stub_hash_entry *stub_entry;
4364 struct erratum_835769_branch_to_stub_data *data;
4366 unsigned long branch_insn = 0;
4367 bfd_vma veneered_insn_loc, veneer_entry_loc;
4368 bfd_signed_vma branch_offset;
4369 unsigned int target;
4372 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
4373 data = (struct erratum_835769_branch_to_stub_data *) in_arg;
4375 if (stub_entry->target_section != data->output_section
4376 || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer)
4379 contents = data->contents;
4380 veneered_insn_loc = stub_entry->target_section->output_section->vma
4381 + stub_entry->target_section->output_offset
4382 + stub_entry->target_value;
4383 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4384 + stub_entry->stub_sec->output_offset
4385 + stub_entry->stub_offset;
4386 branch_offset = veneer_entry_loc - veneered_insn_loc;
4388 abfd = stub_entry->target_section->owner;
4389 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4390 (*_bfd_error_handler)
4391 (_("%B: error: Erratum 835769 stub out "
4392 "of range (input file too large)"), abfd);
4394 target = stub_entry->target_value;
4395 branch_insn = 0x14000000;
4396 branch_offset >>= 2;
4397 branch_offset &= 0x3ffffff;
4398 branch_insn |= branch_offset;
4399 bfd_putl32 (branch_insn, &contents[target]);
4406 _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry *gen_entry,
4409 struct elf_aarch64_stub_hash_entry *stub_entry
4410 = (struct elf_aarch64_stub_hash_entry *) gen_entry;
4411 struct erratum_835769_branch_to_stub_data *data
4412 = (struct erratum_835769_branch_to_stub_data *) in_arg;
4413 struct bfd_link_info *info;
4414 struct elf_aarch64_link_hash_table *htab;
4422 contents = data->contents;
4423 section = data->output_section;
4425 htab = elf_aarch64_hash_table (info);
4427 if (stub_entry->target_section != section
4428 || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer)
4431 insn = bfd_getl32 (contents + stub_entry->target_value);
4433 stub_entry->stub_sec->contents + stub_entry->stub_offset);
4435 place = (section->output_section->vma + section->output_offset
4436 + stub_entry->adrp_offset);
4437 insn = bfd_getl32 (contents + stub_entry->adrp_offset);
4439 if ((insn & AARCH64_ADRP_OP_MASK) != AARCH64_ADRP_OP)
4442 bfd_signed_vma imm =
4443 (_bfd_aarch64_sign_extend
4444 ((bfd_vma) _bfd_aarch64_decode_adrp_imm (insn) << 12, 33)
4447 if (htab->fix_erratum_843419_adr
4448 && (imm >= AARCH64_MIN_ADRP_IMM && imm <= AARCH64_MAX_ADRP_IMM))
4450 insn = (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP, imm)
4451 | AARCH64_RT (insn));
4452 bfd_putl32 (insn, contents + stub_entry->adrp_offset);
4456 bfd_vma veneered_insn_loc;
4457 bfd_vma veneer_entry_loc;
4458 bfd_signed_vma branch_offset;
4459 uint32_t branch_insn;
4461 veneered_insn_loc = stub_entry->target_section->output_section->vma
4462 + stub_entry->target_section->output_offset
4463 + stub_entry->target_value;
4464 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4465 + stub_entry->stub_sec->output_offset
4466 + stub_entry->stub_offset;
4467 branch_offset = veneer_entry_loc - veneered_insn_loc;
4469 abfd = stub_entry->target_section->owner;
4470 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4471 (*_bfd_error_handler)
4472 (_("%B: error: Erratum 843419 stub out "
4473 "of range (input file too large)"), abfd);
4475 branch_insn = 0x14000000;
4476 branch_offset >>= 2;
4477 branch_offset &= 0x3ffffff;
4478 branch_insn |= branch_offset;
4479 bfd_putl32 (branch_insn, contents + stub_entry->target_value);
4486 elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED,
4487 struct bfd_link_info *link_info,
4492 struct elf_aarch64_link_hash_table *globals =
4493 elf_aarch64_hash_table (link_info);
4495 if (globals == NULL)
4498 /* Fix code to point to erratum 835769 stubs. */
4499 if (globals->fix_erratum_835769)
4501 struct erratum_835769_branch_to_stub_data data;
4503 data.info = link_info;
4504 data.output_section = sec;
4505 data.contents = contents;
4506 bfd_hash_traverse (&globals->stub_hash_table,
4507 make_branch_to_erratum_835769_stub, &data);
4510 if (globals->fix_erratum_843419)
4512 struct erratum_835769_branch_to_stub_data data;
4514 data.info = link_info;
4515 data.output_section = sec;
4516 data.contents = contents;
4517 bfd_hash_traverse (&globals->stub_hash_table,
4518 _bfd_aarch64_erratum_843419_branch_to_stub, &data);
4524 /* Perform a relocation as part of a final link. */
4525 static bfd_reloc_status_type
4526 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
4529 asection *input_section,
4531 Elf_Internal_Rela *rel,
4533 struct bfd_link_info *info,
4535 struct elf_link_hash_entry *h,
4536 bfd_boolean *unresolved_reloc_p,
4537 bfd_boolean save_addend,
4538 bfd_vma *saved_addend,
4539 Elf_Internal_Sym *sym)
4541 Elf_Internal_Shdr *symtab_hdr;
4542 unsigned int r_type = howto->type;
4543 bfd_reloc_code_real_type bfd_r_type
4544 = elfNN_aarch64_bfd_reloc_from_howto (howto);
4545 bfd_reloc_code_real_type new_bfd_r_type;
4546 unsigned long r_symndx;
4547 bfd_byte *hit_data = contents + rel->r_offset;
4549 bfd_signed_vma signed_addend;
4550 struct elf_aarch64_link_hash_table *globals;
4551 bfd_boolean weak_undef_p;
4554 globals = elf_aarch64_hash_table (info);
4556 symtab_hdr = &elf_symtab_hdr (input_bfd);
4558 BFD_ASSERT (is_aarch64_elf (input_bfd));
4560 r_symndx = ELFNN_R_SYM (rel->r_info);
4562 /* It is possible to have linker relaxations on some TLS access
4563 models. Update our information here. */
4564 new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx);
4565 if (new_bfd_r_type != bfd_r_type)
4567 bfd_r_type = new_bfd_r_type;
4568 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4569 BFD_ASSERT (howto != NULL);
4570 r_type = howto->type;
4573 place = input_section->output_section->vma
4574 + input_section->output_offset + rel->r_offset;
4576 /* Get addend, accumulating the addend for consecutive relocs
4577 which refer to the same offset. */
4578 signed_addend = saved_addend ? *saved_addend : 0;
4579 signed_addend += rel->r_addend;
4581 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
4582 : bfd_is_und_section (sym_sec));
4584 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4585 it here if it is defined in a non-shared object. */
4587 && h->type == STT_GNU_IFUNC
4594 if ((input_section->flags & SEC_ALLOC) == 0
4595 || h->plt.offset == (bfd_vma) -1)
4598 /* STT_GNU_IFUNC symbol must go through PLT. */
4599 plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
4600 value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
4605 if (h->root.root.string)
4606 name = h->root.root.string;
4608 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4610 (*_bfd_error_handler)
4611 (_("%B: relocation %s against STT_GNU_IFUNC "
4612 "symbol `%s' isn't handled by %s"), input_bfd,
4613 howto->name, name, __FUNCTION__);
4614 bfd_set_error (bfd_error_bad_value);
4617 case BFD_RELOC_AARCH64_NN:
4618 if (rel->r_addend != 0)
4620 if (h->root.root.string)
4621 name = h->root.root.string;
4623 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4625 (*_bfd_error_handler)
4626 (_("%B: relocation %s against STT_GNU_IFUNC "
4627 "symbol `%s' has non-zero addend: %d"),
4628 input_bfd, howto->name, name, rel->r_addend);
4629 bfd_set_error (bfd_error_bad_value);
4633 /* Generate dynamic relocation only when there is a
4634 non-GOT reference in a shared object. */
4635 if (info->shared && h->non_got_ref)
4637 Elf_Internal_Rela outrel;
4640 /* Need a dynamic relocation to get the real function
4642 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4646 if (outrel.r_offset == (bfd_vma) -1
4647 || outrel.r_offset == (bfd_vma) -2)
4650 outrel.r_offset += (input_section->output_section->vma
4651 + input_section->output_offset);
4653 if (h->dynindx == -1
4655 || info->executable)
4657 /* This symbol is resolved locally. */
4658 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
4659 outrel.r_addend = (h->root.u.def.value
4660 + h->root.u.def.section->output_section->vma
4661 + h->root.u.def.section->output_offset);
4665 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4666 outrel.r_addend = 0;
4669 sreloc = globals->root.irelifunc;
4670 elf_append_rela (output_bfd, sreloc, &outrel);
4672 /* If this reloc is against an external symbol, we
4673 do not want to fiddle with the addend. Otherwise,
4674 we need to include the symbol value so that it
4675 becomes an addend for the dynamic reloc. For an
4676 internal symbol, we have updated addend. */
4677 return bfd_reloc_ok;
4680 case BFD_RELOC_AARCH64_CALL26:
4681 case BFD_RELOC_AARCH64_JUMP26:
4682 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4685 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
4687 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4688 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4689 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4690 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4691 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4692 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4693 base_got = globals->root.sgot;
4694 off = h->got.offset;
4696 if (base_got == NULL)
4699 if (off == (bfd_vma) -1)
4703 /* We can't use h->got.offset here to save state, or
4704 even just remember the offset, as finish_dynamic_symbol
4705 would use that as offset into .got. */
4707 if (globals->root.splt != NULL)
4709 plt_index = ((h->plt.offset - globals->plt_header_size) /
4710 globals->plt_entry_size);
4711 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4712 base_got = globals->root.sgotplt;
4716 plt_index = h->plt.offset / globals->plt_entry_size;
4717 off = plt_index * GOT_ENTRY_SIZE;
4718 base_got = globals->root.igotplt;
4721 if (h->dynindx == -1
4725 /* This references the local definition. We must
4726 initialize this entry in the global offset table.
4727 Since the offset must always be a multiple of 8,
4728 we use the least significant bit to record
4729 whether we have initialized it already.
4731 When doing a dynamic link, we create a .rela.got
4732 relocation entry to initialize the value. This
4733 is done in the finish_dynamic_symbol routine. */
4738 bfd_put_NN (output_bfd, value,
4739 base_got->contents + off);
4740 /* Note that this is harmless as -1 | 1 still is -1. */
4744 value = (base_got->output_section->vma
4745 + base_got->output_offset + off);
4748 value = aarch64_calculate_got_entry_vma (h, globals, info,
4750 unresolved_reloc_p);
4751 if (bfd_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
4752 || bfd_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
4753 addend = (globals->root.sgot->output_section->vma
4754 + globals->root.sgot->output_offset);
4755 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4756 addend, weak_undef_p);
4757 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
4758 case BFD_RELOC_AARCH64_ADD_LO12:
4759 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4766 case BFD_RELOC_AARCH64_NONE:
4767 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4768 *unresolved_reloc_p = FALSE;
4769 return bfd_reloc_ok;
4771 case BFD_RELOC_AARCH64_NN:
4773 /* When generating a shared object or relocatable executable, these
4774 relocations are copied into the output file to be resolved at
4776 if (((info->shared == TRUE) || globals->root.is_relocatable_executable)
4777 && (input_section->flags & SEC_ALLOC)
4779 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4780 || h->root.type != bfd_link_hash_undefweak))
4782 Elf_Internal_Rela outrel;
4784 bfd_boolean skip, relocate;
4787 *unresolved_reloc_p = FALSE;
4792 outrel.r_addend = signed_addend;
4794 _bfd_elf_section_offset (output_bfd, info, input_section,
4796 if (outrel.r_offset == (bfd_vma) - 1)
4798 else if (outrel.r_offset == (bfd_vma) - 2)
4804 outrel.r_offset += (input_section->output_section->vma
4805 + input_section->output_offset);
4808 memset (&outrel, 0, sizeof outrel);
4811 && (!info->shared || !SYMBOLIC_BIND (info, h) || !h->def_regular))
4812 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4817 /* On SVR4-ish systems, the dynamic loader cannot
4818 relocate the text and data segments independently,
4819 so the symbol does not matter. */
4821 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
4822 outrel.r_addend += value;
4825 sreloc = elf_section_data (input_section)->sreloc;
4826 if (sreloc == NULL || sreloc->contents == NULL)
4827 return bfd_reloc_notsupported;
4829 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
4830 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
4832 if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
4834 /* Sanity to check that we have previously allocated
4835 sufficient space in the relocation section for the
4836 number of relocations we actually want to emit. */
4840 /* If this reloc is against an external symbol, we do not want to
4841 fiddle with the addend. Otherwise, we need to include the symbol
4842 value so that it becomes an addend for the dynamic reloc. */
4844 return bfd_reloc_ok;
4846 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4847 contents, rel->r_offset, value,
4851 value += signed_addend;
4854 case BFD_RELOC_AARCH64_CALL26:
4855 case BFD_RELOC_AARCH64_JUMP26:
4857 asection *splt = globals->root.splt;
4858 bfd_boolean via_plt_p =
4859 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
4861 /* A call to an undefined weak symbol is converted to a jump to
4862 the next instruction unless a PLT entry will be created.
4863 The jump to the next instruction is optimized as a NOP.
4864 Do the same for local undefined symbols. */
4865 if (weak_undef_p && ! via_plt_p)
4867 bfd_putl32 (INSN_NOP, hit_data);
4868 return bfd_reloc_ok;
4871 /* If the call goes through a PLT entry, make sure to
4872 check distance to the right destination address. */
4875 value = (splt->output_section->vma
4876 + splt->output_offset + h->plt.offset);
4877 *unresolved_reloc_p = FALSE;
4880 /* If the target symbol is global and marked as a function the
4881 relocation applies a function call or a tail call. In this
4882 situation we can veneer out of range branches. The veneers
4883 use IP0 and IP1 hence cannot be used arbitrary out of range
4884 branches that occur within the body of a function. */
4885 if (h && h->type == STT_FUNC)
4887 /* Check if a stub has to be inserted because the destination
4889 if (! aarch64_valid_branch_p (value, place))
4891 /* The target is out of reach, so redirect the branch to
4892 the local stub for this function. */
4893 struct elf_aarch64_stub_hash_entry *stub_entry;
4894 stub_entry = elfNN_aarch64_get_stub_entry (input_section,
4897 if (stub_entry != NULL)
4898 value = (stub_entry->stub_offset
4899 + stub_entry->stub_sec->output_offset
4900 + stub_entry->stub_sec->output_section->vma);
4904 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4905 signed_addend, weak_undef_p);
4908 case BFD_RELOC_AARCH64_16_PCREL:
4909 case BFD_RELOC_AARCH64_32_PCREL:
4910 case BFD_RELOC_AARCH64_64_PCREL:
4911 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
4912 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4913 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
4914 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
4916 && (input_section->flags & SEC_ALLOC) != 0
4917 && (input_section->flags & SEC_READONLY) != 0
4921 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
4923 (*_bfd_error_handler)
4924 (_("%B: relocation %s against external symbol `%s' can not be used"
4925 " when making a shared object; recompile with -fPIC"),
4926 input_bfd, elfNN_aarch64_howto_table[howto_index].name,
4927 h->root.root.string);
4928 bfd_set_error (bfd_error_bad_value);
4932 case BFD_RELOC_AARCH64_16:
4934 case BFD_RELOC_AARCH64_32:
4936 case BFD_RELOC_AARCH64_ADD_LO12:
4937 case BFD_RELOC_AARCH64_BRANCH19:
4938 case BFD_RELOC_AARCH64_LDST128_LO12:
4939 case BFD_RELOC_AARCH64_LDST16_LO12:
4940 case BFD_RELOC_AARCH64_LDST32_LO12:
4941 case BFD_RELOC_AARCH64_LDST64_LO12:
4942 case BFD_RELOC_AARCH64_LDST8_LO12:
4943 case BFD_RELOC_AARCH64_MOVW_G0:
4944 case BFD_RELOC_AARCH64_MOVW_G0_NC:
4945 case BFD_RELOC_AARCH64_MOVW_G0_S:
4946 case BFD_RELOC_AARCH64_MOVW_G1:
4947 case BFD_RELOC_AARCH64_MOVW_G1_NC:
4948 case BFD_RELOC_AARCH64_MOVW_G1_S:
4949 case BFD_RELOC_AARCH64_MOVW_G2:
4950 case BFD_RELOC_AARCH64_MOVW_G2_NC:
4951 case BFD_RELOC_AARCH64_MOVW_G2_S:
4952 case BFD_RELOC_AARCH64_MOVW_G3:
4953 case BFD_RELOC_AARCH64_TSTBR14:
4954 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4955 signed_addend, weak_undef_p);
4958 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4959 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4960 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4961 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4962 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4963 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4964 if (globals->root.sgot == NULL)
4965 BFD_ASSERT (h != NULL);
4970 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
4972 unresolved_reloc_p);
4973 if (bfd_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
4974 || bfd_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
4975 addend = (globals->root.sgot->output_section->vma
4976 + globals->root.sgot->output_offset);
4977 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4978 addend, weak_undef_p);
4983 struct elf_aarch64_local_symbol *locals
4984 = elf_aarch64_locals (input_bfd);
4988 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
4989 (*_bfd_error_handler)
4990 (_("%B: Local symbol descriptor table be NULL when applying "
4991 "relocation %s against local symbol"),
4992 input_bfd, elfNN_aarch64_howto_table[howto_index].name);
4996 off = symbol_got_offset (input_bfd, h, r_symndx);
4997 base_got = globals->root.sgot;
4998 bfd_vma got_entry_addr = (base_got->output_section->vma
4999 + base_got->output_offset + off);
5001 if (!symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5003 bfd_put_64 (output_bfd, value, base_got->contents + off);
5008 Elf_Internal_Rela outrel;
5010 /* For local symbol, we have done absolute relocation in static
5011 linking stageh. While for share library, we need to update
5012 the content of GOT entry according to the share objects
5013 loading base address. So we need to generate a
5014 R_AARCH64_RELATIVE reloc for dynamic linker. */
5015 s = globals->root.srelgot;
5019 outrel.r_offset = got_entry_addr;
5020 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
5021 outrel.r_addend = value;
5022 elf_append_rela (output_bfd, s, &outrel);
5025 symbol_got_offset_mark (input_bfd, h, r_symndx);
5028 /* Update the relocation value to GOT entry addr as we have transformed
5029 the direct data access into indirect data access through GOT. */
5030 value = got_entry_addr;
5032 if (bfd_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5033 || bfd_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
5034 addend = base_got->output_section->vma + base_got->output_offset;
5036 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5037 addend, weak_undef_p);
5042 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5043 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5044 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5045 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5046 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5047 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5048 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5049 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
5050 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
5051 if (globals->root.sgot == NULL)
5052 return bfd_reloc_notsupported;
5054 value = (symbol_got_offset (input_bfd, h, r_symndx)
5055 + globals->root.sgot->output_section->vma
5056 + globals->root.sgot->output_offset);
5058 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5060 *unresolved_reloc_p = FALSE;
5063 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5064 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5065 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5066 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5067 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5068 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5069 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5070 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5071 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5072 signed_addend - tpoff_base (info),
5074 *unresolved_reloc_p = FALSE;
5077 case BFD_RELOC_AARCH64_TLSDESC_ADD:
5078 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5079 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5080 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5081 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5082 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5083 case BFD_RELOC_AARCH64_TLSDESC_LDR:
5084 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5085 if (globals->root.sgot == NULL)
5086 return bfd_reloc_notsupported;
5087 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
5088 + globals->root.sgotplt->output_section->vma
5089 + globals->root.sgotplt->output_offset
5090 + globals->sgotplt_jump_table_size);
5092 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5094 *unresolved_reloc_p = FALSE;
5098 return bfd_reloc_notsupported;
5102 *saved_addend = value;
5104 /* Only apply the final relocation in a sequence. */
5106 return bfd_reloc_continue;
5108 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
5112 /* Handle TLS relaxations. Relaxing is possible for symbols that use
5113 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
5116 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
5117 is to then call final_link_relocate. Return other values in the
5120 static bfd_reloc_status_type
5121 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
5122 bfd *input_bfd, bfd_byte *contents,
5123 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
5125 bfd_boolean is_local = h == NULL;
5126 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
5129 BFD_ASSERT (globals && input_bfd && contents && rel);
5131 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
5133 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5134 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5137 /* GD->LE relaxation:
5138 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
5140 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
5142 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
5143 return bfd_reloc_continue;
5147 /* GD->IE relaxation:
5148 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
5150 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
5152 return bfd_reloc_continue;
5155 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5159 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5162 /* Tiny TLSDESC->LE relaxation:
5163 ldr x1, :tlsdesc:var => movz x0, #:tprel_g1:var
5164 adr x0, :tlsdesc:var => movk x0, #:tprel_g0_nc:var
5168 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
5169 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
5171 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5172 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
5173 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5175 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
5176 bfd_putl32 (0xf2800000, contents + rel->r_offset + 4);
5177 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
5178 return bfd_reloc_continue;
5182 /* Tiny TLSDESC->IE relaxation:
5183 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
5184 adr x0, :tlsdesc:var => nop
5188 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
5189 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
5191 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5192 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5194 bfd_putl32 (0x58000000, contents + rel->r_offset);
5195 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
5196 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
5197 return bfd_reloc_continue;
5200 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5203 /* Tiny GD->LE relaxation:
5204 adr x0, :tlsgd:var => mrs x1, tpidr_el0
5205 bl __tls_get_addr => add x0, x1, #:tprel_hi12:x, lsl #12
5206 nop => add x0, x0, #:tprel_lo12_nc:x
5209 /* First kill the tls_get_addr reloc on the bl instruction. */
5210 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5212 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0);
5213 bfd_putl32 (0x91400020, contents + rel->r_offset + 4);
5214 bfd_putl32 (0x91000000, contents + rel->r_offset + 8);
5216 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5217 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC));
5218 rel[1].r_offset = rel->r_offset + 8;
5220 /* Move the current relocation to the second instruction in
5223 rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5224 AARCH64_R (TLSLE_ADD_TPREL_HI12));
5225 return bfd_reloc_continue;
5229 /* Tiny GD->IE relaxation:
5230 adr x0, :tlsgd:var => ldr x0, :gottprel:var
5231 bl __tls_get_addr => mrs x1, tpidr_el0
5232 nop => add x0, x0, x1
5235 /* First kill the tls_get_addr reloc on the bl instruction. */
5236 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5237 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5239 bfd_putl32 (0x58000000, contents + rel->r_offset);
5240 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
5241 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
5242 return bfd_reloc_continue;
5245 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5246 return bfd_reloc_continue;
5248 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
5251 /* GD->LE relaxation:
5252 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
5254 bfd_putl32 (0xf2800000, contents + rel->r_offset);
5255 return bfd_reloc_continue;
5259 /* GD->IE relaxation:
5260 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
5262 insn = bfd_getl32 (contents + rel->r_offset);
5264 bfd_putl32 (insn, contents + rel->r_offset);
5265 return bfd_reloc_continue;
5268 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5271 /* GD->LE relaxation
5272 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
5273 bl __tls_get_addr => mrs x1, tpidr_el0
5274 nop => add x0, x1, x0
5277 /* First kill the tls_get_addr reloc on the bl instruction. */
5278 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5279 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5281 bfd_putl32 (0xf2800000, contents + rel->r_offset);
5282 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
5283 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
5284 return bfd_reloc_continue;
5288 /* GD->IE relaxation
5289 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
5290 BL __tls_get_addr => mrs x1, tpidr_el0
5292 NOP => add x0, x1, x0
5295 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
5297 /* Remove the relocation on the BL instruction. */
5298 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5300 bfd_putl32 (0xf9400000, contents + rel->r_offset);
5302 /* We choose to fixup the BL and NOP instructions using the
5303 offset from the second relocation to allow flexibility in
5304 scheduling instructions between the ADD and BL. */
5305 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
5306 bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4);
5307 return bfd_reloc_continue;
5310 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5311 case BFD_RELOC_AARCH64_TLSDESC_CALL:
5312 /* GD->IE/LE relaxation:
5313 add x0, x0, #:tlsdesc_lo12:var => nop
5316 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
5317 return bfd_reloc_ok;
5319 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5320 /* IE->LE relaxation:
5321 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
5325 insn = bfd_getl32 (contents + rel->r_offset);
5326 bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset);
5328 return bfd_reloc_continue;
5330 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
5331 /* IE->LE relaxation:
5332 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
5336 insn = bfd_getl32 (contents + rel->r_offset);
5337 bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset);
5339 return bfd_reloc_continue;
5342 return bfd_reloc_continue;
5345 return bfd_reloc_ok;
5348 /* Relocate an AArch64 ELF section. */
5351 elfNN_aarch64_relocate_section (bfd *output_bfd,
5352 struct bfd_link_info *info,
5354 asection *input_section,
5356 Elf_Internal_Rela *relocs,
5357 Elf_Internal_Sym *local_syms,
5358 asection **local_sections)
5360 Elf_Internal_Shdr *symtab_hdr;
5361 struct elf_link_hash_entry **sym_hashes;
5362 Elf_Internal_Rela *rel;
5363 Elf_Internal_Rela *relend;
5365 struct elf_aarch64_link_hash_table *globals;
5366 bfd_boolean save_addend = FALSE;
5369 globals = elf_aarch64_hash_table (info);
5371 symtab_hdr = &elf_symtab_hdr (input_bfd);
5372 sym_hashes = elf_sym_hashes (input_bfd);
5375 relend = relocs + input_section->reloc_count;
5376 for (; rel < relend; rel++)
5378 unsigned int r_type;
5379 bfd_reloc_code_real_type bfd_r_type;
5380 bfd_reloc_code_real_type relaxed_bfd_r_type;
5381 reloc_howto_type *howto;
5382 unsigned long r_symndx;
5383 Elf_Internal_Sym *sym;
5385 struct elf_link_hash_entry *h;
5387 bfd_reloc_status_type r;
5390 bfd_boolean unresolved_reloc = FALSE;
5391 char *error_message = NULL;
5393 r_symndx = ELFNN_R_SYM (rel->r_info);
5394 r_type = ELFNN_R_TYPE (rel->r_info);
5396 bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type);
5397 howto = bfd_reloc.howto;
5401 (*_bfd_error_handler)
5402 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
5403 input_bfd, input_section, r_type);
5406 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
5412 if (r_symndx < symtab_hdr->sh_info)
5414 sym = local_syms + r_symndx;
5415 sym_type = ELFNN_ST_TYPE (sym->st_info);
5416 sec = local_sections[r_symndx];
5418 /* An object file might have a reference to a local
5419 undefined symbol. This is a daft object file, but we
5420 should at least do something about it. */
5421 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
5422 && bfd_is_und_section (sec)
5423 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
5425 if (!info->callbacks->undefined_symbol
5426 (info, bfd_elf_string_from_elf_section
5427 (input_bfd, symtab_hdr->sh_link, sym->st_name),
5428 input_bfd, input_section, rel->r_offset, TRUE))
5432 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5434 /* Relocate against local STT_GNU_IFUNC symbol. */
5435 if (!info->relocatable
5436 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
5438 h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
5443 /* Set STT_GNU_IFUNC symbol value. */
5444 h->root.u.def.value = sym->st_value;
5445 h->root.u.def.section = sec;
5450 bfd_boolean warned, ignored;
5452 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5453 r_symndx, symtab_hdr, sym_hashes,
5455 unresolved_reloc, warned, ignored);
5460 if (sec != NULL && discarded_section (sec))
5461 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
5462 rel, 1, relend, howto, 0, contents);
5464 if (info->relocatable)
5468 name = h->root.root.string;
5471 name = (bfd_elf_string_from_elf_section
5472 (input_bfd, symtab_hdr->sh_link, sym->st_name));
5473 if (name == NULL || *name == '\0')
5474 name = bfd_section_name (input_bfd, sec);
5478 && r_type != R_AARCH64_NONE
5479 && r_type != R_AARCH64_NULL
5481 || h->root.type == bfd_link_hash_defined
5482 || h->root.type == bfd_link_hash_defweak)
5483 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
5485 (*_bfd_error_handler)
5486 ((sym_type == STT_TLS
5487 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
5488 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
5490 input_section, (long) rel->r_offset, howto->name, name);
5493 /* We relax only if we can see that there can be a valid transition
5494 from a reloc type to another.
5495 We call elfNN_aarch64_final_link_relocate unless we're completely
5496 done, i.e., the relaxation produced the final output we want. */
5498 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
5500 if (relaxed_bfd_r_type != bfd_r_type)
5502 bfd_r_type = relaxed_bfd_r_type;
5503 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
5504 BFD_ASSERT (howto != NULL);
5505 r_type = howto->type;
5506 r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
5507 unresolved_reloc = 0;
5510 r = bfd_reloc_continue;
5512 /* There may be multiple consecutive relocations for the
5513 same offset. In that case we are supposed to treat the
5514 output of each relocation as the addend for the next. */
5515 if (rel + 1 < relend
5516 && rel->r_offset == rel[1].r_offset
5517 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
5518 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
5521 save_addend = FALSE;
5523 if (r == bfd_reloc_continue)
5524 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
5525 input_section, contents, rel,
5526 relocation, info, sec,
5527 h, &unresolved_reloc,
5528 save_addend, &addend, sym);
5530 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
5532 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5533 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5534 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5535 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
5536 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
5537 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5539 bfd_boolean need_relocs = FALSE;
5544 off = symbol_got_offset (input_bfd, h, r_symndx);
5545 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5548 (info->shared || indx != 0) &&
5550 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5551 || h->root.type != bfd_link_hash_undefweak);
5553 BFD_ASSERT (globals->root.srelgot != NULL);
5557 Elf_Internal_Rela rela;
5558 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
5560 rela.r_offset = globals->root.sgot->output_section->vma +
5561 globals->root.sgot->output_offset + off;
5564 loc = globals->root.srelgot->contents;
5565 loc += globals->root.srelgot->reloc_count++
5566 * RELOC_SIZE (htab);
5567 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5569 bfd_reloc_code_real_type real_type =
5570 elfNN_aarch64_bfd_reloc_from_type (r_type);
5572 if (real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
5573 || real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21)
5575 /* For local dynamic, don't generate DTPREL in any case.
5576 Initialize the DTPREL slot into zero, so we get module
5577 base address when invoke runtime TLS resolver. */
5578 bfd_put_NN (output_bfd, 0,
5579 globals->root.sgot->contents + off
5584 bfd_put_NN (output_bfd,
5585 relocation - dtpoff_base (info),
5586 globals->root.sgot->contents + off
5591 /* This TLS symbol is global. We emit a
5592 relocation to fixup the tls offset at load
5595 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
5598 (globals->root.sgot->output_section->vma
5599 + globals->root.sgot->output_offset + off
5602 loc = globals->root.srelgot->contents;
5603 loc += globals->root.srelgot->reloc_count++
5604 * RELOC_SIZE (globals);
5605 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5606 bfd_put_NN (output_bfd, (bfd_vma) 0,
5607 globals->root.sgot->contents + off
5613 bfd_put_NN (output_bfd, (bfd_vma) 1,
5614 globals->root.sgot->contents + off);
5615 bfd_put_NN (output_bfd,
5616 relocation - dtpoff_base (info),
5617 globals->root.sgot->contents + off
5621 symbol_got_offset_mark (input_bfd, h, r_symndx);
5625 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5626 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
5627 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5628 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5630 bfd_boolean need_relocs = FALSE;
5635 off = symbol_got_offset (input_bfd, h, r_symndx);
5637 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5640 (info->shared || indx != 0) &&
5642 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5643 || h->root.type != bfd_link_hash_undefweak);
5645 BFD_ASSERT (globals->root.srelgot != NULL);
5649 Elf_Internal_Rela rela;
5652 rela.r_addend = relocation - dtpoff_base (info);
5656 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
5657 rela.r_offset = globals->root.sgot->output_section->vma +
5658 globals->root.sgot->output_offset + off;
5660 loc = globals->root.srelgot->contents;
5661 loc += globals->root.srelgot->reloc_count++
5662 * RELOC_SIZE (htab);
5664 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5666 bfd_put_NN (output_bfd, rela.r_addend,
5667 globals->root.sgot->contents + off);
5670 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
5671 globals->root.sgot->contents + off);
5673 symbol_got_offset_mark (input_bfd, h, r_symndx);
5677 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5678 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5679 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5680 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5681 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5682 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5683 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5684 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5687 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5688 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5689 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5690 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
5691 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5692 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
5694 bfd_boolean need_relocs = FALSE;
5695 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
5696 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
5698 need_relocs = (h == NULL
5699 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5700 || h->root.type != bfd_link_hash_undefweak);
5702 BFD_ASSERT (globals->root.srelgot != NULL);
5703 BFD_ASSERT (globals->root.sgot != NULL);
5708 Elf_Internal_Rela rela;
5709 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
5712 rela.r_offset = (globals->root.sgotplt->output_section->vma
5713 + globals->root.sgotplt->output_offset
5714 + off + globals->sgotplt_jump_table_size);
5717 rela.r_addend = relocation - dtpoff_base (info);
5719 /* Allocate the next available slot in the PLT reloc
5720 section to hold our R_AARCH64_TLSDESC, the next
5721 available slot is determined from reloc_count,
5722 which we step. But note, reloc_count was
5723 artifically moved down while allocating slots for
5724 real PLT relocs such that all of the PLT relocs
5725 will fit above the initial reloc_count and the
5726 extra stuff will fit below. */
5727 loc = globals->root.srelplt->contents;
5728 loc += globals->root.srelplt->reloc_count++
5729 * RELOC_SIZE (globals);
5731 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5733 bfd_put_NN (output_bfd, (bfd_vma) 0,
5734 globals->root.sgotplt->contents + off +
5735 globals->sgotplt_jump_table_size);
5736 bfd_put_NN (output_bfd, (bfd_vma) 0,
5737 globals->root.sgotplt->contents + off +
5738 globals->sgotplt_jump_table_size +
5742 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
5753 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5754 because such sections are not SEC_ALLOC and thus ld.so will
5755 not process them. */
5756 if (unresolved_reloc
5757 && !((input_section->flags & SEC_DEBUGGING) != 0
5759 && _bfd_elf_section_offset (output_bfd, info, input_section,
5760 +rel->r_offset) != (bfd_vma) - 1)
5762 (*_bfd_error_handler)
5764 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5765 input_bfd, input_section, (long) rel->r_offset, howto->name,
5766 h->root.root.string);
5770 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
5774 case bfd_reloc_overflow:
5775 if (!(*info->callbacks->reloc_overflow)
5776 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
5777 input_bfd, input_section, rel->r_offset))
5781 case bfd_reloc_undefined:
5782 if (!((*info->callbacks->undefined_symbol)
5783 (info, name, input_bfd, input_section,
5784 rel->r_offset, TRUE)))
5788 case bfd_reloc_outofrange:
5789 error_message = _("out of range");
5792 case bfd_reloc_notsupported:
5793 error_message = _("unsupported relocation");
5796 case bfd_reloc_dangerous:
5797 /* error_message should already be set. */
5801 error_message = _("unknown error");
5805 BFD_ASSERT (error_message != NULL);
5806 if (!((*info->callbacks->reloc_dangerous)
5807 (info, error_message, input_bfd, input_section,
5818 /* Set the right machine number. */
5821 elfNN_aarch64_object_p (bfd *abfd)
5824 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
5826 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
5831 /* Function to keep AArch64 specific flags in the ELF header. */
5834 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
5836 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
5841 elf_elfheader (abfd)->e_flags = flags;
5842 elf_flags_init (abfd) = TRUE;
5848 /* Merge backend specific data from an object file to the output
5849 object file when linking. */
5852 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5856 bfd_boolean flags_compatible = TRUE;
5859 /* Check if we have the same endianess. */
5860 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5863 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
5866 /* The input BFD must have had its flags initialised. */
5867 /* The following seems bogus to me -- The flags are initialized in
5868 the assembler but I don't think an elf_flags_init field is
5869 written into the object. */
5870 /* BFD_ASSERT (elf_flags_init (ibfd)); */
5872 in_flags = elf_elfheader (ibfd)->e_flags;
5873 out_flags = elf_elfheader (obfd)->e_flags;
5875 if (!elf_flags_init (obfd))
5877 /* If the input is the default architecture and had the default
5878 flags then do not bother setting the flags for the output
5879 architecture, instead allow future merges to do this. If no
5880 future merges ever set these flags then they will retain their
5881 uninitialised values, which surprise surprise, correspond
5882 to the default values. */
5883 if (bfd_get_arch_info (ibfd)->the_default
5884 && elf_elfheader (ibfd)->e_flags == 0)
5887 elf_flags_init (obfd) = TRUE;
5888 elf_elfheader (obfd)->e_flags = in_flags;
5890 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
5891 && bfd_get_arch_info (obfd)->the_default)
5892 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
5893 bfd_get_mach (ibfd));
5898 /* Identical flags must be compatible. */
5899 if (in_flags == out_flags)
5902 /* Check to see if the input BFD actually contains any sections. If
5903 not, its flags may not have been initialised either, but it
5904 cannot actually cause any incompatiblity. Do not short-circuit
5905 dynamic objects; their section list may be emptied by
5906 elf_link_add_object_symbols.
5908 Also check to see if there are no code sections in the input.
5909 In this case there is no need to check for code specific flags.
5910 XXX - do we need to worry about floating-point format compatability
5911 in data sections ? */
5912 if (!(ibfd->flags & DYNAMIC))
5914 bfd_boolean null_input_bfd = TRUE;
5915 bfd_boolean only_data_sections = TRUE;
5917 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5919 if ((bfd_get_section_flags (ibfd, sec)
5920 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5921 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5922 only_data_sections = FALSE;
5924 null_input_bfd = FALSE;
5928 if (null_input_bfd || only_data_sections)
5932 return flags_compatible;
5935 /* Display the flags field. */
5938 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
5940 FILE *file = (FILE *) ptr;
5941 unsigned long flags;
5943 BFD_ASSERT (abfd != NULL && ptr != NULL);
5945 /* Print normal ELF private data. */
5946 _bfd_elf_print_private_bfd_data (abfd, ptr);
5948 flags = elf_elfheader (abfd)->e_flags;
5949 /* Ignore init flag - it may not be set, despite the flags field
5950 containing valid data. */
5952 /* xgettext:c-format */
5953 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5956 fprintf (file, _("<Unrecognised flag bits set>"));
5963 /* Update the got entry reference counts for the section being removed. */
5966 elfNN_aarch64_gc_sweep_hook (bfd *abfd,
5967 struct bfd_link_info *info,
5969 const Elf_Internal_Rela * relocs)
5971 struct elf_aarch64_link_hash_table *htab;
5972 Elf_Internal_Shdr *symtab_hdr;
5973 struct elf_link_hash_entry **sym_hashes;
5974 struct elf_aarch64_local_symbol *locals;
5975 const Elf_Internal_Rela *rel, *relend;
5977 if (info->relocatable)
5980 htab = elf_aarch64_hash_table (info);
5985 elf_section_data (sec)->local_dynrel = NULL;
5987 symtab_hdr = &elf_symtab_hdr (abfd);
5988 sym_hashes = elf_sym_hashes (abfd);
5990 locals = elf_aarch64_locals (abfd);
5992 relend = relocs + sec->reloc_count;
5993 for (rel = relocs; rel < relend; rel++)
5995 unsigned long r_symndx;
5996 unsigned int r_type;
5997 struct elf_link_hash_entry *h = NULL;
5999 r_symndx = ELFNN_R_SYM (rel->r_info);
6001 if (r_symndx >= symtab_hdr->sh_info)
6004 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6005 while (h->root.type == bfd_link_hash_indirect
6006 || h->root.type == bfd_link_hash_warning)
6007 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6011 Elf_Internal_Sym *isym;
6013 /* A local symbol. */
6014 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6017 /* Check relocation against local STT_GNU_IFUNC symbol. */
6019 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
6021 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE);
6029 struct elf_aarch64_link_hash_entry *eh;
6030 struct elf_dyn_relocs **pp;
6031 struct elf_dyn_relocs *p;
6033 eh = (struct elf_aarch64_link_hash_entry *) h;
6035 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6038 /* Everything must go for SEC. */
6044 r_type = ELFNN_R_TYPE (rel->r_info);
6045 switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx))
6047 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
6048 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
6049 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
6050 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
6051 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
6052 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
6053 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
6054 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6055 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6056 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
6057 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
6058 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6059 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6060 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6061 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6062 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6063 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
6064 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
6065 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6066 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6067 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6068 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
6069 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
6070 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
6071 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
6072 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
6073 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
6074 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
6075 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
6078 if (h->got.refcount > 0)
6079 h->got.refcount -= 1;
6081 if (h->type == STT_GNU_IFUNC)
6083 if (h->plt.refcount > 0)
6084 h->plt.refcount -= 1;
6087 else if (locals != NULL)
6089 if (locals[r_symndx].got_refcount > 0)
6090 locals[r_symndx].got_refcount -= 1;
6094 case BFD_RELOC_AARCH64_CALL26:
6095 case BFD_RELOC_AARCH64_JUMP26:
6096 /* If this is a local symbol then we resolve it
6097 directly without creating a PLT entry. */
6101 if (h->plt.refcount > 0)
6102 h->plt.refcount -= 1;
6105 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
6106 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
6107 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
6108 case BFD_RELOC_AARCH64_MOVW_G0_NC:
6109 case BFD_RELOC_AARCH64_MOVW_G1_NC:
6110 case BFD_RELOC_AARCH64_MOVW_G2_NC:
6111 case BFD_RELOC_AARCH64_MOVW_G3:
6112 case BFD_RELOC_AARCH64_NN:
6113 if (h != NULL && info->executable)
6115 if (h->plt.refcount > 0)
6116 h->plt.refcount -= 1;
6128 /* Adjust a symbol defined by a dynamic object and referenced by a
6129 regular object. The current definition is in some section of the
6130 dynamic object, but we're not including those sections. We have to
6131 change the definition to something the rest of the link can
6135 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
6136 struct elf_link_hash_entry *h)
6138 struct elf_aarch64_link_hash_table *htab;
6141 /* If this is a function, put it in the procedure linkage table. We
6142 will fill in the contents of the procedure linkage table later,
6143 when we know the address of the .got section. */
6144 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
6146 if (h->plt.refcount <= 0
6147 || (h->type != STT_GNU_IFUNC
6148 && (SYMBOL_CALLS_LOCAL (info, h)
6149 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6150 && h->root.type == bfd_link_hash_undefweak))))
6152 /* This case can occur if we saw a CALL26 reloc in
6153 an input file, but the symbol wasn't referred to
6154 by a dynamic object or all references were
6155 garbage collected. In which case we can end up
6157 h->plt.offset = (bfd_vma) - 1;
6164 /* Otherwise, reset to -1. */
6165 h->plt.offset = (bfd_vma) - 1;
6168 /* If this is a weak symbol, and there is a real definition, the
6169 processor independent code will have arranged for us to see the
6170 real definition first, and we can just use the same value. */
6171 if (h->u.weakdef != NULL)
6173 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6174 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6175 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6176 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6177 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
6178 h->non_got_ref = h->u.weakdef->non_got_ref;
6182 /* If we are creating a shared library, we must presume that the
6183 only references to the symbol are via the global offset table.
6184 For such cases we need not do anything here; the relocations will
6185 be handled correctly by relocate_section. */
6189 /* If there are no references to this symbol that do not use the
6190 GOT, we don't need to generate a copy reloc. */
6191 if (!h->non_got_ref)
6194 /* If -z nocopyreloc was given, we won't generate them either. */
6195 if (info->nocopyreloc)
6201 /* We must allocate the symbol in our .dynbss section, which will
6202 become part of the .bss section of the executable. There will be
6203 an entry for this symbol in the .dynsym section. The dynamic
6204 object will contain position independent code, so all references
6205 from the dynamic object to this symbol will go through the global
6206 offset table. The dynamic linker will use the .dynsym entry to
6207 determine the address it must put in the global offset table, so
6208 both the dynamic object and the regular object will refer to the
6209 same memory location for the variable. */
6211 htab = elf_aarch64_hash_table (info);
6213 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
6214 to copy the initial value out of the dynamic object and into the
6215 runtime process image. */
6216 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6218 htab->srelbss->size += RELOC_SIZE (htab);
6224 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6229 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
6231 struct elf_aarch64_local_symbol *locals;
6232 locals = elf_aarch64_locals (abfd);
6235 locals = (struct elf_aarch64_local_symbol *)
6236 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
6239 elf_aarch64_locals (abfd) = locals;
6244 /* Create the .got section to hold the global offset table. */
6247 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
6249 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6252 struct elf_link_hash_entry *h;
6253 struct elf_link_hash_table *htab = elf_hash_table (info);
6255 /* This function may be called more than once. */
6256 s = bfd_get_linker_section (abfd, ".got");
6260 flags = bed->dynamic_sec_flags;
6262 s = bfd_make_section_anyway_with_flags (abfd,
6263 (bed->rela_plts_and_copies_p
6264 ? ".rela.got" : ".rel.got"),
6265 (bed->dynamic_sec_flags
6268 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
6272 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
6274 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
6277 htab->sgot->size += GOT_ENTRY_SIZE;
6279 if (bed->want_got_sym)
6281 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
6282 (or .got.plt) section. We don't do this in the linker script
6283 because we don't want to define the symbol if we are not creating
6284 a global offset table. */
6285 h = _bfd_elf_define_linkage_sym (abfd, info, s,
6286 "_GLOBAL_OFFSET_TABLE_");
6287 elf_hash_table (info)->hgot = h;
6292 if (bed->want_got_plt)
6294 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
6296 || !bfd_set_section_alignment (abfd, s,
6297 bed->s->log_file_align))
6302 /* The first bit of the global offset table is the header. */
6303 s->size += bed->got_header_size;
6308 /* Look through the relocs for a section during the first phase. */
6311 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
6312 asection *sec, const Elf_Internal_Rela *relocs)
6314 Elf_Internal_Shdr *symtab_hdr;
6315 struct elf_link_hash_entry **sym_hashes;
6316 const Elf_Internal_Rela *rel;
6317 const Elf_Internal_Rela *rel_end;
6320 struct elf_aarch64_link_hash_table *htab;
6322 if (info->relocatable)
6325 BFD_ASSERT (is_aarch64_elf (abfd));
6327 htab = elf_aarch64_hash_table (info);
6330 symtab_hdr = &elf_symtab_hdr (abfd);
6331 sym_hashes = elf_sym_hashes (abfd);
6333 rel_end = relocs + sec->reloc_count;
6334 for (rel = relocs; rel < rel_end; rel++)
6336 struct elf_link_hash_entry *h;
6337 unsigned long r_symndx;
6338 unsigned int r_type;
6339 bfd_reloc_code_real_type bfd_r_type;
6340 Elf_Internal_Sym *isym;
6342 r_symndx = ELFNN_R_SYM (rel->r_info);
6343 r_type = ELFNN_R_TYPE (rel->r_info);
6345 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
6347 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
6352 if (r_symndx < symtab_hdr->sh_info)
6354 /* A local symbol. */
6355 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6360 /* Check relocation against local STT_GNU_IFUNC symbol. */
6361 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
6363 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
6368 /* Fake a STT_GNU_IFUNC symbol. */
6369 h->type = STT_GNU_IFUNC;
6372 h->forced_local = 1;
6373 h->root.type = bfd_link_hash_defined;
6380 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6381 while (h->root.type == bfd_link_hash_indirect
6382 || h->root.type == bfd_link_hash_warning)
6383 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6385 /* PR15323, ref flags aren't set for references in the same
6387 h->root.non_ir_ref = 1;
6390 /* Could be done earlier, if h were already available. */
6391 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
6395 /* Create the ifunc sections for static executables. If we
6396 never see an indirect function symbol nor we are building
6397 a static executable, those sections will be empty and
6398 won't appear in output. */
6404 case BFD_RELOC_AARCH64_ADD_LO12:
6405 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
6406 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
6407 case BFD_RELOC_AARCH64_CALL26:
6408 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
6409 case BFD_RELOC_AARCH64_JUMP26:
6410 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
6411 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
6412 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
6413 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
6414 case BFD_RELOC_AARCH64_NN:
6415 if (htab->root.dynobj == NULL)
6416 htab->root.dynobj = abfd;
6417 if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
6422 /* It is referenced by a non-shared object. */
6424 h->root.non_ir_ref = 1;
6429 case BFD_RELOC_AARCH64_NN:
6431 /* We don't need to handle relocs into sections not going into
6432 the "real" output. */
6433 if ((sec->flags & SEC_ALLOC) == 0)
6441 h->plt.refcount += 1;
6442 h->pointer_equality_needed = 1;
6445 /* No need to do anything if we're not creating a shared
6451 struct elf_dyn_relocs *p;
6452 struct elf_dyn_relocs **head;
6454 /* We must copy these reloc types into the output file.
6455 Create a reloc section in dynobj and make room for
6459 if (htab->root.dynobj == NULL)
6460 htab->root.dynobj = abfd;
6462 sreloc = _bfd_elf_make_dynamic_reloc_section
6463 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
6469 /* If this is a global symbol, we count the number of
6470 relocations we need for this symbol. */
6473 struct elf_aarch64_link_hash_entry *eh;
6474 eh = (struct elf_aarch64_link_hash_entry *) h;
6475 head = &eh->dyn_relocs;
6479 /* Track dynamic relocs needed for local syms too.
6480 We really need local syms available to do this
6486 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6491 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6495 /* Beware of type punned pointers vs strict aliasing
6497 vpp = &(elf_section_data (s)->local_dynrel);
6498 head = (struct elf_dyn_relocs **) vpp;
6502 if (p == NULL || p->sec != sec)
6504 bfd_size_type amt = sizeof *p;
6505 p = ((struct elf_dyn_relocs *)
6506 bfd_zalloc (htab->root.dynobj, amt));
6519 /* RR: We probably want to keep a consistency check that
6520 there are no dangling GOT_PAGE relocs. */
6521 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
6522 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
6523 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
6524 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
6525 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
6526 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
6527 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
6528 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6529 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6530 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
6531 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
6532 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6533 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6534 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6535 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6536 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6537 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
6538 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
6539 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6540 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6541 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6542 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
6543 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
6544 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
6545 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
6546 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
6547 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
6548 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
6549 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
6552 unsigned old_got_type;
6554 got_type = aarch64_reloc_got_type (bfd_r_type);
6558 h->got.refcount += 1;
6559 old_got_type = elf_aarch64_hash_entry (h)->got_type;
6563 struct elf_aarch64_local_symbol *locals;
6565 if (!elfNN_aarch64_allocate_local_symbols
6566 (abfd, symtab_hdr->sh_info))
6569 locals = elf_aarch64_locals (abfd);
6570 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
6571 locals[r_symndx].got_refcount += 1;
6572 old_got_type = locals[r_symndx].got_type;
6575 /* If a variable is accessed with both general dynamic TLS
6576 methods, two slots may be created. */
6577 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
6578 got_type |= old_got_type;
6580 /* We will already have issued an error message if there
6581 is a TLS/non-TLS mismatch, based on the symbol type.
6582 So just combine any TLS types needed. */
6583 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
6584 && got_type != GOT_NORMAL)
6585 got_type |= old_got_type;
6587 /* If the symbol is accessed by both IE and GD methods, we
6588 are able to relax. Turn off the GD flag, without
6589 messing up with any other kind of TLS types that may be
6591 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
6592 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
6594 if (old_got_type != got_type)
6597 elf_aarch64_hash_entry (h)->got_type = got_type;
6600 struct elf_aarch64_local_symbol *locals;
6601 locals = elf_aarch64_locals (abfd);
6602 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
6603 locals[r_symndx].got_type = got_type;
6607 if (htab->root.dynobj == NULL)
6608 htab->root.dynobj = abfd;
6609 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
6614 case BFD_RELOC_AARCH64_MOVW_G0_NC:
6615 case BFD_RELOC_AARCH64_MOVW_G1_NC:
6616 case BFD_RELOC_AARCH64_MOVW_G2_NC:
6617 case BFD_RELOC_AARCH64_MOVW_G3:
6620 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
6621 (*_bfd_error_handler)
6622 (_("%B: relocation %s against `%s' can not be used when making "
6623 "a shared object; recompile with -fPIC"),
6624 abfd, elfNN_aarch64_howto_table[howto_index].name,
6625 (h) ? h->root.root.string : "a local symbol");
6626 bfd_set_error (bfd_error_bad_value);
6630 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
6631 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
6632 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
6633 if (h != NULL && info->executable)
6635 /* If this reloc is in a read-only section, we might
6636 need a copy reloc. We can't check reliably at this
6637 stage whether the section is read-only, as input
6638 sections have not yet been mapped to output sections.
6639 Tentatively set the flag for now, and correct in
6640 adjust_dynamic_symbol. */
6642 h->plt.refcount += 1;
6643 h->pointer_equality_needed = 1;
6645 /* FIXME:: RR need to handle these in shared libraries
6646 and essentially bomb out as these being non-PIC
6647 relocations in shared libraries. */
6650 case BFD_RELOC_AARCH64_CALL26:
6651 case BFD_RELOC_AARCH64_JUMP26:
6652 /* If this is a local symbol then we resolve it
6653 directly without creating a PLT entry. */
6658 if (h->plt.refcount <= 0)
6659 h->plt.refcount = 1;
6661 h->plt.refcount += 1;
6672 /* Treat mapping symbols as special target symbols. */
6675 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
6678 return bfd_is_aarch64_special_symbol_name (sym->name,
6679 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
6682 /* This is a copy of elf_find_function () from elf.c except that
6683 AArch64 mapping symbols are ignored when looking for function names. */
6686 aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6690 const char **filename_ptr,
6691 const char **functionname_ptr)
6693 const char *filename = NULL;
6694 asymbol *func = NULL;
6695 bfd_vma low_func = 0;
6698 for (p = symbols; *p != NULL; p++)
6702 q = (elf_symbol_type *) * p;
6704 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6709 filename = bfd_asymbol_name (&q->symbol);
6713 /* Skip mapping symbols. */
6714 if ((q->symbol.flags & BSF_LOCAL)
6715 && (bfd_is_aarch64_special_symbol_name
6716 (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
6719 if (bfd_get_section (&q->symbol) == section
6720 && q->symbol.value >= low_func && q->symbol.value <= offset)
6722 func = (asymbol *) q;
6723 low_func = q->symbol.value;
6733 *filename_ptr = filename;
6734 if (functionname_ptr)
6735 *functionname_ptr = bfd_asymbol_name (func);
6741 /* Find the nearest line to a particular section and offset, for error
6742 reporting. This code is a duplicate of the code in elf.c, except
6743 that it uses aarch64_elf_find_function. */
6746 elfNN_aarch64_find_nearest_line (bfd *abfd,
6750 const char **filename_ptr,
6751 const char **functionname_ptr,
6752 unsigned int *line_ptr,
6753 unsigned int *discriminator_ptr)
6755 bfd_boolean found = FALSE;
6757 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
6758 filename_ptr, functionname_ptr,
6759 line_ptr, discriminator_ptr,
6760 dwarf_debug_sections, 0,
6761 &elf_tdata (abfd)->dwarf2_find_line_info))
6763 if (!*functionname_ptr)
6764 aarch64_elf_find_function (abfd, symbols, section, offset,
6765 *filename_ptr ? NULL : filename_ptr,
6771 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
6772 toolchain uses DWARF1. */
6774 if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6775 &found, filename_ptr,
6776 functionname_ptr, line_ptr,
6777 &elf_tdata (abfd)->line_info))
6780 if (found && (*functionname_ptr || *line_ptr))
6783 if (symbols == NULL)
6786 if (!aarch64_elf_find_function (abfd, symbols, section, offset,
6787 filename_ptr, functionname_ptr))
6795 elfNN_aarch64_find_inliner_info (bfd *abfd,
6796 const char **filename_ptr,
6797 const char **functionname_ptr,
6798 unsigned int *line_ptr)
6801 found = _bfd_dwarf2_find_inliner_info
6802 (abfd, filename_ptr,
6803 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
6809 elfNN_aarch64_post_process_headers (bfd *abfd,
6810 struct bfd_link_info *link_info)
6812 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
6814 i_ehdrp = elf_elfheader (abfd);
6815 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
6817 _bfd_elf_post_process_headers (abfd, link_info);
6820 static enum elf_reloc_type_class
6821 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
6822 const asection *rel_sec ATTRIBUTE_UNUSED,
6823 const Elf_Internal_Rela *rela)
6825 switch ((int) ELFNN_R_TYPE (rela->r_info))
6827 case AARCH64_R (RELATIVE):
6828 return reloc_class_relative;
6829 case AARCH64_R (JUMP_SLOT):
6830 return reloc_class_plt;
6831 case AARCH64_R (COPY):
6832 return reloc_class_copy;
6834 return reloc_class_normal;
6838 /* Handle an AArch64 specific section when reading an object file. This is
6839 called when bfd_section_from_shdr finds a section with an unknown
6843 elfNN_aarch64_section_from_shdr (bfd *abfd,
6844 Elf_Internal_Shdr *hdr,
6845 const char *name, int shindex)
6847 /* There ought to be a place to keep ELF backend specific flags, but
6848 at the moment there isn't one. We just keep track of the
6849 sections by their name, instead. Fortunately, the ABI gives
6850 names for all the AArch64 specific sections, so we will probably get
6852 switch (hdr->sh_type)
6854 case SHT_AARCH64_ATTRIBUTES:
6861 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6867 /* A structure used to record a list of sections, independently
6868 of the next and prev fields in the asection structure. */
6869 typedef struct section_list
6872 struct section_list *next;
6873 struct section_list *prev;
6877 /* Unfortunately we need to keep a list of sections for which
6878 an _aarch64_elf_section_data structure has been allocated. This
6879 is because it is possible for functions like elfNN_aarch64_write_section
6880 to be called on a section which has had an elf_data_structure
6881 allocated for it (and so the used_by_bfd field is valid) but
6882 for which the AArch64 extended version of this structure - the
6883 _aarch64_elf_section_data structure - has not been allocated. */
6884 static section_list *sections_with_aarch64_elf_section_data = NULL;
6887 record_section_with_aarch64_elf_section_data (asection *sec)
6889 struct section_list *entry;
6891 entry = bfd_malloc (sizeof (*entry));
6895 entry->next = sections_with_aarch64_elf_section_data;
6897 if (entry->next != NULL)
6898 entry->next->prev = entry;
6899 sections_with_aarch64_elf_section_data = entry;
6902 static struct section_list *
6903 find_aarch64_elf_section_entry (asection *sec)
6905 struct section_list *entry;
6906 static struct section_list *last_entry = NULL;
6908 /* This is a short cut for the typical case where the sections are added
6909 to the sections_with_aarch64_elf_section_data list in forward order and
6910 then looked up here in backwards order. This makes a real difference
6911 to the ld-srec/sec64k.exp linker test. */
6912 entry = sections_with_aarch64_elf_section_data;
6913 if (last_entry != NULL)
6915 if (last_entry->sec == sec)
6917 else if (last_entry->next != NULL && last_entry->next->sec == sec)
6918 entry = last_entry->next;
6921 for (; entry; entry = entry->next)
6922 if (entry->sec == sec)
6926 /* Record the entry prior to this one - it is the entry we are
6927 most likely to want to locate next time. Also this way if we
6928 have been called from
6929 unrecord_section_with_aarch64_elf_section_data () we will not
6930 be caching a pointer that is about to be freed. */
6931 last_entry = entry->prev;
6937 unrecord_section_with_aarch64_elf_section_data (asection *sec)
6939 struct section_list *entry;
6941 entry = find_aarch64_elf_section_entry (sec);
6945 if (entry->prev != NULL)
6946 entry->prev->next = entry->next;
6947 if (entry->next != NULL)
6948 entry->next->prev = entry->prev;
6949 if (entry == sections_with_aarch64_elf_section_data)
6950 sections_with_aarch64_elf_section_data = entry->next;
6959 struct bfd_link_info *info;
6962 int (*func) (void *, const char *, Elf_Internal_Sym *,
6963 asection *, struct elf_link_hash_entry *);
6964 } output_arch_syminfo;
6966 enum map_symbol_type
6973 /* Output a single mapping symbol. */
6976 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
6977 enum map_symbol_type type, bfd_vma offset)
6979 static const char *names[2] = { "$x", "$d" };
6980 Elf_Internal_Sym sym;
6982 sym.st_value = (osi->sec->output_section->vma
6983 + osi->sec->output_offset + offset);
6986 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
6987 sym.st_shndx = osi->sec_shndx;
6988 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
6993 /* Output mapping symbols for PLT entries associated with H. */
6996 elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf)
6998 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
7001 if (h->root.type == bfd_link_hash_indirect)
7004 if (h->root.type == bfd_link_hash_warning)
7005 /* When warning symbols are created, they **replace** the "real"
7006 entry in the hash table, thus we never get to see the real
7007 symbol in a hash traversal. So look at it now. */
7008 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7010 if (h->plt.offset == (bfd_vma) - 1)
7013 addr = h->plt.offset;
7016 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7023 /* Output a single local symbol for a generated stub. */
7026 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
7027 bfd_vma offset, bfd_vma size)
7029 Elf_Internal_Sym sym;
7031 sym.st_value = (osi->sec->output_section->vma
7032 + osi->sec->output_offset + offset);
7035 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7036 sym.st_shndx = osi->sec_shndx;
7037 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
7041 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7043 struct elf_aarch64_stub_hash_entry *stub_entry;
7047 output_arch_syminfo *osi;
7049 /* Massage our args to the form they really have. */
7050 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
7051 osi = (output_arch_syminfo *) in_arg;
7053 stub_sec = stub_entry->stub_sec;
7055 /* Ensure this stub is attached to the current section being
7057 if (stub_sec != osi->sec)
7060 addr = (bfd_vma) stub_entry->stub_offset;
7062 stub_name = stub_entry->output_name;
7064 switch (stub_entry->stub_type)
7066 case aarch64_stub_adrp_branch:
7067 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7068 sizeof (aarch64_adrp_branch_stub)))
7070 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7073 case aarch64_stub_long_branch:
7074 if (!elfNN_aarch64_output_stub_sym
7075 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
7077 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7079 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
7082 case aarch64_stub_erratum_835769_veneer:
7083 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7084 sizeof (aarch64_erratum_835769_stub)))
7086 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7089 case aarch64_stub_erratum_843419_veneer:
7090 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7091 sizeof (aarch64_erratum_843419_stub)))
7093 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7104 /* Output mapping symbols for linker generated sections. */
7107 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
7108 struct bfd_link_info *info,
7110 int (*func) (void *, const char *,
7113 struct elf_link_hash_entry
7116 output_arch_syminfo osi;
7117 struct elf_aarch64_link_hash_table *htab;
7119 htab = elf_aarch64_hash_table (info);
7125 /* Long calls stubs. */
7126 if (htab->stub_bfd && htab->stub_bfd->sections)
7130 for (stub_sec = htab->stub_bfd->sections;
7131 stub_sec != NULL; stub_sec = stub_sec->next)
7133 /* Ignore non-stub sections. */
7134 if (!strstr (stub_sec->name, STUB_SUFFIX))
7139 osi.sec_shndx = _bfd_elf_section_from_bfd_section
7140 (output_bfd, osi.sec->output_section);
7142 /* The first instruction in a stub is always a branch. */
7143 if (!elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0))
7146 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
7151 /* Finally, output mapping symbols for the PLT. */
7152 if (!htab->root.splt || htab->root.splt->size == 0)
7155 /* For now live without mapping symbols for the plt. */
7156 osi.sec_shndx = _bfd_elf_section_from_bfd_section
7157 (output_bfd, htab->root.splt->output_section);
7158 osi.sec = htab->root.splt;
7160 elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map,
7167 /* Allocate target specific section data. */
7170 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
7172 if (!sec->used_by_bfd)
7174 _aarch64_elf_section_data *sdata;
7175 bfd_size_type amt = sizeof (*sdata);
7177 sdata = bfd_zalloc (abfd, amt);
7180 sec->used_by_bfd = sdata;
7183 record_section_with_aarch64_elf_section_data (sec);
7185 return _bfd_elf_new_section_hook (abfd, sec);
7190 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
7192 void *ignore ATTRIBUTE_UNUSED)
7194 unrecord_section_with_aarch64_elf_section_data (sec);
7198 elfNN_aarch64_close_and_cleanup (bfd *abfd)
7201 bfd_map_over_sections (abfd,
7202 unrecord_section_via_map_over_sections, NULL);
7204 return _bfd_elf_close_and_cleanup (abfd);
7208 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
7211 bfd_map_over_sections (abfd,
7212 unrecord_section_via_map_over_sections, NULL);
7214 return _bfd_free_cached_info (abfd);
7217 /* Create dynamic sections. This is different from the ARM backend in that
7218 the got, plt, gotplt and their relocation sections are all created in the
7219 standard part of the bfd elf backend. */
7222 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
7223 struct bfd_link_info *info)
7225 struct elf_aarch64_link_hash_table *htab;
7227 /* We need to create .got section. */
7228 if (!aarch64_elf_create_got_section (dynobj, info))
7231 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
7234 htab = elf_aarch64_hash_table (info);
7235 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
7237 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
7239 if (!htab->sdynbss || (!info->shared && !htab->srelbss))
7246 /* Allocate space in .plt, .got and associated reloc sections for
7250 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7252 struct bfd_link_info *info;
7253 struct elf_aarch64_link_hash_table *htab;
7254 struct elf_aarch64_link_hash_entry *eh;
7255 struct elf_dyn_relocs *p;
7257 /* An example of a bfd_link_hash_indirect symbol is versioned
7258 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
7259 -> __gxx_personality_v0(bfd_link_hash_defined)
7261 There is no need to process bfd_link_hash_indirect symbols here
7262 because we will also be presented with the concrete instance of
7263 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
7264 called to copy all relevant data from the generic to the concrete
7267 if (h->root.type == bfd_link_hash_indirect)
7270 if (h->root.type == bfd_link_hash_warning)
7271 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7273 info = (struct bfd_link_info *) inf;
7274 htab = elf_aarch64_hash_table (info);
7276 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
7277 here if it is defined and referenced in a non-shared object. */
7278 if (h->type == STT_GNU_IFUNC
7281 else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
7283 /* Make sure this symbol is output as a dynamic symbol.
7284 Undefined weak syms won't yet be marked as dynamic. */
7285 if (h->dynindx == -1 && !h->forced_local)
7287 if (!bfd_elf_link_record_dynamic_symbol (info, h))
7291 if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
7293 asection *s = htab->root.splt;
7295 /* If this is the first .plt entry, make room for the special
7298 s->size += htab->plt_header_size;
7300 h->plt.offset = s->size;
7302 /* If this symbol is not defined in a regular file, and we are
7303 not generating a shared library, then set the symbol to this
7304 location in the .plt. This is required to make function
7305 pointers compare as equal between the normal executable and
7306 the shared library. */
7307 if (!info->shared && !h->def_regular)
7309 h->root.u.def.section = s;
7310 h->root.u.def.value = h->plt.offset;
7313 /* Make room for this entry. For now we only create the
7314 small model PLT entries. We later need to find a way
7315 of relaxing into these from the large model PLT entries. */
7316 s->size += PLT_SMALL_ENTRY_SIZE;
7318 /* We also need to make an entry in the .got.plt section, which
7319 will be placed in the .got section by the linker script. */
7320 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
7322 /* We also need to make an entry in the .rela.plt section. */
7323 htab->root.srelplt->size += RELOC_SIZE (htab);
7325 /* We need to ensure that all GOT entries that serve the PLT
7326 are consecutive with the special GOT slots [0] [1] and
7327 [2]. Any addtional relocations, such as
7328 R_AARCH64_TLSDESC, must be placed after the PLT related
7329 entries. We abuse the reloc_count such that during
7330 sizing we adjust reloc_count to indicate the number of
7331 PLT related reserved entries. In subsequent phases when
7332 filling in the contents of the reloc entries, PLT related
7333 entries are placed by computing their PLT index (0
7334 .. reloc_count). While other none PLT relocs are placed
7335 at the slot indicated by reloc_count and reloc_count is
7338 htab->root.srelplt->reloc_count++;
7342 h->plt.offset = (bfd_vma) - 1;
7348 h->plt.offset = (bfd_vma) - 1;
7352 eh = (struct elf_aarch64_link_hash_entry *) h;
7353 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
7355 if (h->got.refcount > 0)
7358 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
7360 h->got.offset = (bfd_vma) - 1;
7362 dyn = htab->root.dynamic_sections_created;
7364 /* Make sure this symbol is output as a dynamic symbol.
7365 Undefined weak syms won't yet be marked as dynamic. */
7366 if (dyn && h->dynindx == -1 && !h->forced_local)
7368 if (!bfd_elf_link_record_dynamic_symbol (info, h))
7372 if (got_type == GOT_UNKNOWN)
7375 else if (got_type == GOT_NORMAL)
7377 h->got.offset = htab->root.sgot->size;
7378 htab->root.sgot->size += GOT_ENTRY_SIZE;
7379 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7380 || h->root.type != bfd_link_hash_undefweak)
7382 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
7384 htab->root.srelgot->size += RELOC_SIZE (htab);
7390 if (got_type & GOT_TLSDESC_GD)
7392 eh->tlsdesc_got_jump_table_offset =
7393 (htab->root.sgotplt->size
7394 - aarch64_compute_jump_table_size (htab));
7395 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
7396 h->got.offset = (bfd_vma) - 2;
7399 if (got_type & GOT_TLS_GD)
7401 h->got.offset = htab->root.sgot->size;
7402 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
7405 if (got_type & GOT_TLS_IE)
7407 h->got.offset = htab->root.sgot->size;
7408 htab->root.sgot->size += GOT_ENTRY_SIZE;
7411 indx = h && h->dynindx != -1 ? h->dynindx : 0;
7412 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7413 || h->root.type != bfd_link_hash_undefweak)
7416 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
7418 if (got_type & GOT_TLSDESC_GD)
7420 htab->root.srelplt->size += RELOC_SIZE (htab);
7421 /* Note reloc_count not incremented here! We have
7422 already adjusted reloc_count for this relocation
7425 /* TLSDESC PLT is now needed, but not yet determined. */
7426 htab->tlsdesc_plt = (bfd_vma) - 1;
7429 if (got_type & GOT_TLS_GD)
7430 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
7432 if (got_type & GOT_TLS_IE)
7433 htab->root.srelgot->size += RELOC_SIZE (htab);
7439 h->got.offset = (bfd_vma) - 1;
7442 if (eh->dyn_relocs == NULL)
7445 /* In the shared -Bsymbolic case, discard space allocated for
7446 dynamic pc-relative relocs against symbols which turn out to be
7447 defined in regular objects. For the normal shared case, discard
7448 space for pc-relative relocs that have become local due to symbol
7449 visibility changes. */
7453 /* Relocs that use pc_count are those that appear on a call
7454 insn, or certain REL relocs that can generated via assembly.
7455 We want calls to protected symbols to resolve directly to the
7456 function rather than going via the plt. If people want
7457 function pointer comparisons to work as expected then they
7458 should avoid writing weird assembly. */
7459 if (SYMBOL_CALLS_LOCAL (info, h))
7461 struct elf_dyn_relocs **pp;
7463 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
7465 p->count -= p->pc_count;
7474 /* Also discard relocs on undefined weak syms with non-default
7476 if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
7478 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7479 eh->dyn_relocs = NULL;
7481 /* Make sure undefined weak symbols are output as a dynamic
7483 else if (h->dynindx == -1
7485 && !bfd_elf_link_record_dynamic_symbol (info, h))
7490 else if (ELIMINATE_COPY_RELOCS)
7492 /* For the non-shared case, discard space for relocs against
7493 symbols which turn out to need copy relocs or are not
7499 || (htab->root.dynamic_sections_created
7500 && (h->root.type == bfd_link_hash_undefweak
7501 || h->root.type == bfd_link_hash_undefined))))
7503 /* Make sure this symbol is output as a dynamic symbol.
7504 Undefined weak syms won't yet be marked as dynamic. */
7505 if (h->dynindx == -1
7507 && !bfd_elf_link_record_dynamic_symbol (info, h))
7510 /* If that succeeded, we know we'll be keeping all the
7512 if (h->dynindx != -1)
7516 eh->dyn_relocs = NULL;
7521 /* Finally, allocate space. */
7522 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7526 sreloc = elf_section_data (p->sec)->sreloc;
7528 BFD_ASSERT (sreloc != NULL);
7530 sreloc->size += p->count * RELOC_SIZE (htab);
7536 /* Allocate space in .plt, .got and associated reloc sections for
7537 ifunc dynamic relocs. */
7540 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
7543 struct bfd_link_info *info;
7544 struct elf_aarch64_link_hash_table *htab;
7545 struct elf_aarch64_link_hash_entry *eh;
7547 /* An example of a bfd_link_hash_indirect symbol is versioned
7548 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
7549 -> __gxx_personality_v0(bfd_link_hash_defined)
7551 There is no need to process bfd_link_hash_indirect symbols here
7552 because we will also be presented with the concrete instance of
7553 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
7554 called to copy all relevant data from the generic to the concrete
7557 if (h->root.type == bfd_link_hash_indirect)
7560 if (h->root.type == bfd_link_hash_warning)
7561 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7563 info = (struct bfd_link_info *) inf;
7564 htab = elf_aarch64_hash_table (info);
7566 eh = (struct elf_aarch64_link_hash_entry *) h;
7568 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
7569 here if it is defined and referenced in a non-shared object. */
7570 if (h->type == STT_GNU_IFUNC
7572 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
7574 htab->plt_entry_size,
7575 htab->plt_header_size,
7580 /* Allocate space in .plt, .got and associated reloc sections for
7581 local dynamic relocs. */
7584 elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
7586 struct elf_link_hash_entry *h
7587 = (struct elf_link_hash_entry *) *slot;
7589 if (h->type != STT_GNU_IFUNC
7593 || h->root.type != bfd_link_hash_defined)
7596 return elfNN_aarch64_allocate_dynrelocs (h, inf);
7599 /* Allocate space in .plt, .got and associated reloc sections for
7600 local ifunc dynamic relocs. */
7603 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
7605 struct elf_link_hash_entry *h
7606 = (struct elf_link_hash_entry *) *slot;
7608 if (h->type != STT_GNU_IFUNC
7612 || h->root.type != bfd_link_hash_defined)
7615 return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
7618 /* Find any dynamic relocs that apply to read-only sections. */
7621 aarch64_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
7623 struct elf_aarch64_link_hash_entry * eh;
7624 struct elf_dyn_relocs * p;
7626 eh = (struct elf_aarch64_link_hash_entry *) h;
7627 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7629 asection *s = p->sec;
7631 if (s != NULL && (s->flags & SEC_READONLY) != 0)
7633 struct bfd_link_info *info = (struct bfd_link_info *) inf;
7635 info->flags |= DF_TEXTREL;
7637 /* Not an error, just cut short the traversal. */
7644 /* This is the most important function of all . Innocuosly named
7647 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
7648 struct bfd_link_info *info)
7650 struct elf_aarch64_link_hash_table *htab;
7656 htab = elf_aarch64_hash_table ((info));
7657 dynobj = htab->root.dynobj;
7659 BFD_ASSERT (dynobj != NULL);
7661 if (htab->root.dynamic_sections_created)
7663 if (info->executable)
7665 s = bfd_get_linker_section (dynobj, ".interp");
7668 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
7669 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
7673 /* Set up .got offsets for local syms, and space for local dynamic
7675 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7677 struct elf_aarch64_local_symbol *locals = NULL;
7678 Elf_Internal_Shdr *symtab_hdr;
7682 if (!is_aarch64_elf (ibfd))
7685 for (s = ibfd->sections; s != NULL; s = s->next)
7687 struct elf_dyn_relocs *p;
7689 for (p = (struct elf_dyn_relocs *)
7690 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
7692 if (!bfd_is_abs_section (p->sec)
7693 && bfd_is_abs_section (p->sec->output_section))
7695 /* Input section has been discarded, either because
7696 it is a copy of a linkonce section or due to
7697 linker script /DISCARD/, so we'll be discarding
7700 else if (p->count != 0)
7702 srel = elf_section_data (p->sec)->sreloc;
7703 srel->size += p->count * RELOC_SIZE (htab);
7704 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
7705 info->flags |= DF_TEXTREL;
7710 locals = elf_aarch64_locals (ibfd);
7714 symtab_hdr = &elf_symtab_hdr (ibfd);
7715 srel = htab->root.srelgot;
7716 for (i = 0; i < symtab_hdr->sh_info; i++)
7718 locals[i].got_offset = (bfd_vma) - 1;
7719 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
7720 if (locals[i].got_refcount > 0)
7722 unsigned got_type = locals[i].got_type;
7723 if (got_type & GOT_TLSDESC_GD)
7725 locals[i].tlsdesc_got_jump_table_offset =
7726 (htab->root.sgotplt->size
7727 - aarch64_compute_jump_table_size (htab));
7728 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
7729 locals[i].got_offset = (bfd_vma) - 2;
7732 if (got_type & GOT_TLS_GD)
7734 locals[i].got_offset = htab->root.sgot->size;
7735 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
7738 if (got_type & GOT_TLS_IE
7739 || got_type & GOT_NORMAL)
7741 locals[i].got_offset = htab->root.sgot->size;
7742 htab->root.sgot->size += GOT_ENTRY_SIZE;
7745 if (got_type == GOT_UNKNOWN)
7751 if (got_type & GOT_TLSDESC_GD)
7753 htab->root.srelplt->size += RELOC_SIZE (htab);
7754 /* Note RELOC_COUNT not incremented here! */
7755 htab->tlsdesc_plt = (bfd_vma) - 1;
7758 if (got_type & GOT_TLS_GD)
7759 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
7761 if (got_type & GOT_TLS_IE
7762 || got_type & GOT_NORMAL)
7763 htab->root.srelgot->size += RELOC_SIZE (htab);
7768 locals[i].got_refcount = (bfd_vma) - 1;
7774 /* Allocate global sym .plt and .got entries, and space for global
7775 sym dynamic relocs. */
7776 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
7779 /* Allocate global ifunc sym .plt and .got entries, and space for global
7780 ifunc sym dynamic relocs. */
7781 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
7784 /* Allocate .plt and .got entries, and space for local symbols. */
7785 htab_traverse (htab->loc_hash_table,
7786 elfNN_aarch64_allocate_local_dynrelocs,
7789 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
7790 htab_traverse (htab->loc_hash_table,
7791 elfNN_aarch64_allocate_local_ifunc_dynrelocs,
7794 /* For every jump slot reserved in the sgotplt, reloc_count is
7795 incremented. However, when we reserve space for TLS descriptors,
7796 it's not incremented, so in order to compute the space reserved
7797 for them, it suffices to multiply the reloc count by the jump
7800 if (htab->root.srelplt)
7801 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
7803 if (htab->tlsdesc_plt)
7805 if (htab->root.splt->size == 0)
7806 htab->root.splt->size += PLT_ENTRY_SIZE;
7808 htab->tlsdesc_plt = htab->root.splt->size;
7809 htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
7811 /* If we're not using lazy TLS relocations, don't generate the
7812 GOT entry required. */
7813 if (!(info->flags & DF_BIND_NOW))
7815 htab->dt_tlsdesc_got = htab->root.sgot->size;
7816 htab->root.sgot->size += GOT_ENTRY_SIZE;
7820 /* Init mapping symbols information to use later to distingush between
7821 code and data while scanning for errata. */
7822 if (htab->fix_erratum_835769 || htab->fix_erratum_843419)
7823 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7825 if (!is_aarch64_elf (ibfd))
7827 bfd_elfNN_aarch64_init_maps (ibfd);
7830 /* We now have determined the sizes of the various dynamic sections.
7831 Allocate memory for them. */
7833 for (s = dynobj->sections; s != NULL; s = s->next)
7835 if ((s->flags & SEC_LINKER_CREATED) == 0)
7838 if (s == htab->root.splt
7839 || s == htab->root.sgot
7840 || s == htab->root.sgotplt
7841 || s == htab->root.iplt
7842 || s == htab->root.igotplt || s == htab->sdynbss)
7844 /* Strip this section if we don't need it; see the
7847 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7849 if (s->size != 0 && s != htab->root.srelplt)
7852 /* We use the reloc_count field as a counter if we need
7853 to copy relocs into the output file. */
7854 if (s != htab->root.srelplt)
7859 /* It's not one of our sections, so don't allocate space. */
7865 /* If we don't need this section, strip it from the
7866 output file. This is mostly to handle .rela.bss and
7867 .rela.plt. We must create both sections in
7868 create_dynamic_sections, because they must be created
7869 before the linker maps input sections to output
7870 sections. The linker does that before
7871 adjust_dynamic_symbol is called, and it is that
7872 function which decides whether anything needs to go
7873 into these sections. */
7875 s->flags |= SEC_EXCLUDE;
7879 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7882 /* Allocate memory for the section contents. We use bfd_zalloc
7883 here in case unused entries are not reclaimed before the
7884 section's contents are written out. This should not happen,
7885 but this way if it does, we get a R_AARCH64_NONE reloc instead
7887 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
7888 if (s->contents == NULL)
7892 if (htab->root.dynamic_sections_created)
7894 /* Add some entries to the .dynamic section. We fill in the
7895 values later, in elfNN_aarch64_finish_dynamic_sections, but we
7896 must add the entries now so that we get the correct size for
7897 the .dynamic section. The DT_DEBUG entry is filled in by the
7898 dynamic linker and used by the debugger. */
7899 #define add_dynamic_entry(TAG, VAL) \
7900 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7902 if (info->executable)
7904 if (!add_dynamic_entry (DT_DEBUG, 0))
7908 if (htab->root.splt->size != 0)
7910 if (!add_dynamic_entry (DT_PLTGOT, 0)
7911 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7912 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7913 || !add_dynamic_entry (DT_JMPREL, 0))
7916 if (htab->tlsdesc_plt
7917 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
7918 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
7924 if (!add_dynamic_entry (DT_RELA, 0)
7925 || !add_dynamic_entry (DT_RELASZ, 0)
7926 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
7929 /* If any dynamic relocs apply to a read-only section,
7930 then we need a DT_TEXTREL entry. */
7931 if ((info->flags & DF_TEXTREL) == 0)
7932 elf_link_hash_traverse (& htab->root, aarch64_readonly_dynrelocs,
7935 if ((info->flags & DF_TEXTREL) != 0)
7937 if (!add_dynamic_entry (DT_TEXTREL, 0))
7942 #undef add_dynamic_entry
7948 elf_aarch64_update_plt_entry (bfd *output_bfd,
7949 bfd_reloc_code_real_type r_type,
7950 bfd_byte *plt_entry, bfd_vma value)
7952 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
7954 _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
7958 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
7959 struct elf_aarch64_link_hash_table
7960 *htab, bfd *output_bfd,
7961 struct bfd_link_info *info)
7963 bfd_byte *plt_entry;
7966 bfd_vma gotplt_entry_address;
7967 bfd_vma plt_entry_address;
7968 Elf_Internal_Rela rela;
7970 asection *plt, *gotplt, *relplt;
7972 /* When building a static executable, use .iplt, .igot.plt and
7973 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7974 if (htab->root.splt != NULL)
7976 plt = htab->root.splt;
7977 gotplt = htab->root.sgotplt;
7978 relplt = htab->root.srelplt;
7982 plt = htab->root.iplt;
7983 gotplt = htab->root.igotplt;
7984 relplt = htab->root.irelplt;
7987 /* Get the index in the procedure linkage table which
7988 corresponds to this symbol. This is the index of this symbol
7989 in all the symbols for which we are making plt entries. The
7990 first entry in the procedure linkage table is reserved.
7992 Get the offset into the .got table of the entry that
7993 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
7994 bytes. The first three are reserved for the dynamic linker.
7996 For static executables, we don't reserve anything. */
7998 if (plt == htab->root.splt)
8000 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
8001 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
8005 plt_index = h->plt.offset / htab->plt_entry_size;
8006 got_offset = plt_index * GOT_ENTRY_SIZE;
8009 plt_entry = plt->contents + h->plt.offset;
8010 plt_entry_address = plt->output_section->vma
8011 + plt->output_offset + h->plt.offset;
8012 gotplt_entry_address = gotplt->output_section->vma +
8013 gotplt->output_offset + got_offset;
8015 /* Copy in the boiler-plate for the PLTn entry. */
8016 memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
8018 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8019 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8020 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8022 PG (gotplt_entry_address) -
8023 PG (plt_entry_address));
8025 /* Fill in the lo12 bits for the load from the pltgot. */
8026 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
8028 PG_OFFSET (gotplt_entry_address));
8030 /* Fill in the lo12 bits for the add from the pltgot entry. */
8031 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
8033 PG_OFFSET (gotplt_entry_address));
8035 /* All the GOTPLT Entries are essentially initialized to PLT0. */
8036 bfd_put_NN (output_bfd,
8037 plt->output_section->vma + plt->output_offset,
8038 gotplt->contents + got_offset);
8040 rela.r_offset = gotplt_entry_address;
8042 if (h->dynindx == -1
8043 || ((info->executable
8044 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8046 && h->type == STT_GNU_IFUNC))
8048 /* If an STT_GNU_IFUNC symbol is locally defined, generate
8049 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
8050 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
8051 rela.r_addend = (h->root.u.def.value
8052 + h->root.u.def.section->output_section->vma
8053 + h->root.u.def.section->output_offset);
8057 /* Fill in the entry in the .rela.plt section. */
8058 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
8062 /* Compute the relocation entry to used based on PLT index and do
8063 not adjust reloc_count. The reloc_count has already been adjusted
8064 to account for this entry. */
8065 loc = relplt->contents + plt_index * RELOC_SIZE (htab);
8066 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8069 /* Size sections even though they're not dynamic. We use it to setup
8070 _TLS_MODULE_BASE_, if needed. */
8073 elfNN_aarch64_always_size_sections (bfd *output_bfd,
8074 struct bfd_link_info *info)
8078 if (info->relocatable)
8081 tls_sec = elf_hash_table (info)->tls_sec;
8085 struct elf_link_hash_entry *tlsbase;
8087 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
8088 "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
8092 struct bfd_link_hash_entry *h = NULL;
8093 const struct elf_backend_data *bed =
8094 get_elf_backend_data (output_bfd);
8096 if (!(_bfd_generic_link_add_one_symbol
8097 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
8098 tls_sec, 0, NULL, FALSE, bed->collect, &h)))
8101 tlsbase->type = STT_TLS;
8102 tlsbase = (struct elf_link_hash_entry *) h;
8103 tlsbase->def_regular = 1;
8104 tlsbase->other = STV_HIDDEN;
8105 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
8112 /* Finish up dynamic symbol handling. We set the contents of various
8113 dynamic sections here. */
8115 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
8116 struct bfd_link_info *info,
8117 struct elf_link_hash_entry *h,
8118 Elf_Internal_Sym *sym)
8120 struct elf_aarch64_link_hash_table *htab;
8121 htab = elf_aarch64_hash_table (info);
8123 if (h->plt.offset != (bfd_vma) - 1)
8125 asection *plt, *gotplt, *relplt;
8127 /* This symbol has an entry in the procedure linkage table. Set
8130 /* When building a static executable, use .iplt, .igot.plt and
8131 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8132 if (htab->root.splt != NULL)
8134 plt = htab->root.splt;
8135 gotplt = htab->root.sgotplt;
8136 relplt = htab->root.srelplt;
8140 plt = htab->root.iplt;
8141 gotplt = htab->root.igotplt;
8142 relplt = htab->root.irelplt;
8145 /* This symbol has an entry in the procedure linkage table. Set
8147 if ((h->dynindx == -1
8148 && !((h->forced_local || info->executable)
8150 && h->type == STT_GNU_IFUNC))
8156 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
8157 if (!h->def_regular)
8159 /* Mark the symbol as undefined, rather than as defined in
8160 the .plt section. */
8161 sym->st_shndx = SHN_UNDEF;
8162 /* If the symbol is weak we need to clear the value.
8163 Otherwise, the PLT entry would provide a definition for
8164 the symbol even if the symbol wasn't defined anywhere,
8165 and so the symbol would never be NULL. Leave the value if
8166 there were any relocations where pointer equality matters
8167 (this is a clue for the dynamic linker, to make function
8168 pointer comparisons work between an application and shared
8170 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
8175 if (h->got.offset != (bfd_vma) - 1
8176 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL)
8178 Elf_Internal_Rela rela;
8181 /* This symbol has an entry in the global offset table. Set it
8183 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
8186 rela.r_offset = (htab->root.sgot->output_section->vma
8187 + htab->root.sgot->output_offset
8188 + (h->got.offset & ~(bfd_vma) 1));
8191 && h->type == STT_GNU_IFUNC)
8195 /* Generate R_AARCH64_GLOB_DAT. */
8202 if (!h->pointer_equality_needed)
8205 /* For non-shared object, we can't use .got.plt, which
8206 contains the real function address if we need pointer
8207 equality. We load the GOT entry with the PLT entry. */
8208 plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
8209 bfd_put_NN (output_bfd, (plt->output_section->vma
8210 + plt->output_offset
8212 htab->root.sgot->contents
8213 + (h->got.offset & ~(bfd_vma) 1));
8217 else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
8219 if (!h->def_regular)
8222 BFD_ASSERT ((h->got.offset & 1) != 0);
8223 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
8224 rela.r_addend = (h->root.u.def.value
8225 + h->root.u.def.section->output_section->vma
8226 + h->root.u.def.section->output_offset);
8231 BFD_ASSERT ((h->got.offset & 1) == 0);
8232 bfd_put_NN (output_bfd, (bfd_vma) 0,
8233 htab->root.sgot->contents + h->got.offset);
8234 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
8238 loc = htab->root.srelgot->contents;
8239 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
8240 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8245 Elf_Internal_Rela rela;
8248 /* This symbol needs a copy reloc. Set it up. */
8250 if (h->dynindx == -1
8251 || (h->root.type != bfd_link_hash_defined
8252 && h->root.type != bfd_link_hash_defweak)
8253 || htab->srelbss == NULL)
8256 rela.r_offset = (h->root.u.def.value
8257 + h->root.u.def.section->output_section->vma
8258 + h->root.u.def.section->output_offset);
8259 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
8261 loc = htab->srelbss->contents;
8262 loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab);
8263 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8266 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
8267 be NULL for local symbols. */
8269 && (h == elf_hash_table (info)->hdynamic
8270 || h == elf_hash_table (info)->hgot))
8271 sym->st_shndx = SHN_ABS;
8276 /* Finish up local dynamic symbol handling. We set the contents of
8277 various dynamic sections here. */
8280 elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
8282 struct elf_link_hash_entry *h
8283 = (struct elf_link_hash_entry *) *slot;
8284 struct bfd_link_info *info
8285 = (struct bfd_link_info *) inf;
8287 return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
8292 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
8293 struct elf_aarch64_link_hash_table
8296 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
8297 small and large plts and at the minute just generates
8300 /* PLT0 of the small PLT looks like this in ELF64 -
8301 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
8302 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
8303 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
8305 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
8306 // GOTPLT entry for this.
8308 PLT0 will be slightly different in ELF32 due to different got entry
8311 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
8315 memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
8317 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
8320 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
8321 + htab->root.sgotplt->output_offset
8322 + GOT_ENTRY_SIZE * 2);
8324 plt_base = htab->root.splt->output_section->vma +
8325 htab->root.splt->output_offset;
8327 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8328 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8329 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8330 htab->root.splt->contents + 4,
8331 PG (plt_got_2nd_ent) - PG (plt_base + 4));
8333 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
8334 htab->root.splt->contents + 8,
8335 PG_OFFSET (plt_got_2nd_ent));
8337 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
8338 htab->root.splt->contents + 12,
8339 PG_OFFSET (plt_got_2nd_ent));
8343 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
8344 struct bfd_link_info *info)
8346 struct elf_aarch64_link_hash_table *htab;
8350 htab = elf_aarch64_hash_table (info);
8351 dynobj = htab->root.dynobj;
8352 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
8354 if (htab->root.dynamic_sections_created)
8356 ElfNN_External_Dyn *dyncon, *dynconend;
8358 if (sdyn == NULL || htab->root.sgot == NULL)
8361 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
8362 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
8363 for (; dyncon < dynconend; dyncon++)
8365 Elf_Internal_Dyn dyn;
8368 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
8376 s = htab->root.sgotplt;
8377 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8381 dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma;
8385 s = htab->root.srelplt;
8386 dyn.d_un.d_val = s->size;
8390 /* The procedure linkage table relocs (DT_JMPREL) should
8391 not be included in the overall relocs (DT_RELA).
8392 Therefore, we override the DT_RELASZ entry here to
8393 make it not include the JMPREL relocs. Since the
8394 linker script arranges for .rela.plt to follow all
8395 other relocation sections, we don't have to worry
8396 about changing the DT_RELA entry. */
8397 if (htab->root.srelplt != NULL)
8399 s = htab->root.srelplt;
8400 dyn.d_un.d_val -= s->size;
8404 case DT_TLSDESC_PLT:
8405 s = htab->root.splt;
8406 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
8407 + htab->tlsdesc_plt;
8410 case DT_TLSDESC_GOT:
8411 s = htab->root.sgot;
8412 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
8413 + htab->dt_tlsdesc_got;
8417 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
8422 /* Fill in the special first entry in the procedure linkage table. */
8423 if (htab->root.splt && htab->root.splt->size > 0)
8425 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
8427 elf_section_data (htab->root.splt->output_section)->
8428 this_hdr.sh_entsize = htab->plt_entry_size;
8431 if (htab->tlsdesc_plt)
8433 bfd_put_NN (output_bfd, (bfd_vma) 0,
8434 htab->root.sgot->contents + htab->dt_tlsdesc_got);
8436 memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
8437 elfNN_aarch64_tlsdesc_small_plt_entry,
8438 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
8441 bfd_vma adrp1_addr =
8442 htab->root.splt->output_section->vma
8443 + htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
8445 bfd_vma adrp2_addr = adrp1_addr + 4;
8448 htab->root.sgot->output_section->vma
8449 + htab->root.sgot->output_offset;
8451 bfd_vma pltgot_addr =
8452 htab->root.sgotplt->output_section->vma
8453 + htab->root.sgotplt->output_offset;
8455 bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
8457 bfd_byte *plt_entry =
8458 htab->root.splt->contents + htab->tlsdesc_plt;
8460 /* adrp x2, DT_TLSDESC_GOT */
8461 elf_aarch64_update_plt_entry (output_bfd,
8462 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8464 (PG (dt_tlsdesc_got)
8465 - PG (adrp1_addr)));
8468 elf_aarch64_update_plt_entry (output_bfd,
8469 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8472 - PG (adrp2_addr)));
8474 /* ldr x2, [x2, #0] */
8475 elf_aarch64_update_plt_entry (output_bfd,
8476 BFD_RELOC_AARCH64_LDSTNN_LO12,
8478 PG_OFFSET (dt_tlsdesc_got));
8481 elf_aarch64_update_plt_entry (output_bfd,
8482 BFD_RELOC_AARCH64_ADD_LO12,
8484 PG_OFFSET (pltgot_addr));
8489 if (htab->root.sgotplt)
8491 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
8493 (*_bfd_error_handler)
8494 (_("discarded output section: `%A'"), htab->root.sgotplt);
8498 /* Fill in the first three entries in the global offset table. */
8499 if (htab->root.sgotplt->size > 0)
8501 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
8503 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
8504 bfd_put_NN (output_bfd,
8506 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
8507 bfd_put_NN (output_bfd,
8509 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
8512 if (htab->root.sgot)
8514 if (htab->root.sgot->size > 0)
8517 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
8518 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
8522 elf_section_data (htab->root.sgotplt->output_section)->
8523 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
8526 if (htab->root.sgot && htab->root.sgot->size > 0)
8527 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
8530 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
8531 htab_traverse (htab->loc_hash_table,
8532 elfNN_aarch64_finish_local_dynamic_symbol,
8538 /* Return address for Ith PLT stub in section PLT, for relocation REL
8539 or (bfd_vma) -1 if it should not be included. */
8542 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
8543 const arelent *rel ATTRIBUTE_UNUSED)
8545 return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
8549 /* We use this so we can override certain functions
8550 (though currently we don't). */
8552 const struct elf_size_info elfNN_aarch64_size_info =
8554 sizeof (ElfNN_External_Ehdr),
8555 sizeof (ElfNN_External_Phdr),
8556 sizeof (ElfNN_External_Shdr),
8557 sizeof (ElfNN_External_Rel),
8558 sizeof (ElfNN_External_Rela),
8559 sizeof (ElfNN_External_Sym),
8560 sizeof (ElfNN_External_Dyn),
8561 sizeof (Elf_External_Note),
8562 4, /* Hash table entry size. */
8563 1, /* Internal relocs per external relocs. */
8564 ARCH_SIZE, /* Arch size. */
8565 LOG_FILE_ALIGN, /* Log_file_align. */
8566 ELFCLASSNN, EV_CURRENT,
8567 bfd_elfNN_write_out_phdrs,
8568 bfd_elfNN_write_shdrs_and_ehdr,
8569 bfd_elfNN_checksum_contents,
8570 bfd_elfNN_write_relocs,
8571 bfd_elfNN_swap_symbol_in,
8572 bfd_elfNN_swap_symbol_out,
8573 bfd_elfNN_slurp_reloc_table,
8574 bfd_elfNN_slurp_symbol_table,
8575 bfd_elfNN_swap_dyn_in,
8576 bfd_elfNN_swap_dyn_out,
8577 bfd_elfNN_swap_reloc_in,
8578 bfd_elfNN_swap_reloc_out,
8579 bfd_elfNN_swap_reloca_in,
8580 bfd_elfNN_swap_reloca_out
8583 #define ELF_ARCH bfd_arch_aarch64
8584 #define ELF_MACHINE_CODE EM_AARCH64
8585 #define ELF_MAXPAGESIZE 0x10000
8586 #define ELF_MINPAGESIZE 0x1000
8587 #define ELF_COMMONPAGESIZE 0x1000
8589 #define bfd_elfNN_close_and_cleanup \
8590 elfNN_aarch64_close_and_cleanup
8592 #define bfd_elfNN_bfd_free_cached_info \
8593 elfNN_aarch64_bfd_free_cached_info
8595 #define bfd_elfNN_bfd_is_target_special_symbol \
8596 elfNN_aarch64_is_target_special_symbol
8598 #define bfd_elfNN_bfd_link_hash_table_create \
8599 elfNN_aarch64_link_hash_table_create
8601 #define bfd_elfNN_bfd_merge_private_bfd_data \
8602 elfNN_aarch64_merge_private_bfd_data
8604 #define bfd_elfNN_bfd_print_private_bfd_data \
8605 elfNN_aarch64_print_private_bfd_data
8607 #define bfd_elfNN_bfd_reloc_type_lookup \
8608 elfNN_aarch64_reloc_type_lookup
8610 #define bfd_elfNN_bfd_reloc_name_lookup \
8611 elfNN_aarch64_reloc_name_lookup
8613 #define bfd_elfNN_bfd_set_private_flags \
8614 elfNN_aarch64_set_private_flags
8616 #define bfd_elfNN_find_inliner_info \
8617 elfNN_aarch64_find_inliner_info
8619 #define bfd_elfNN_find_nearest_line \
8620 elfNN_aarch64_find_nearest_line
8622 #define bfd_elfNN_mkobject \
8623 elfNN_aarch64_mkobject
8625 #define bfd_elfNN_new_section_hook \
8626 elfNN_aarch64_new_section_hook
8628 #define elf_backend_adjust_dynamic_symbol \
8629 elfNN_aarch64_adjust_dynamic_symbol
8631 #define elf_backend_always_size_sections \
8632 elfNN_aarch64_always_size_sections
8634 #define elf_backend_check_relocs \
8635 elfNN_aarch64_check_relocs
8637 #define elf_backend_copy_indirect_symbol \
8638 elfNN_aarch64_copy_indirect_symbol
8640 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
8641 to them in our hash. */
8642 #define elf_backend_create_dynamic_sections \
8643 elfNN_aarch64_create_dynamic_sections
8645 #define elf_backend_init_index_section \
8646 _bfd_elf_init_2_index_sections
8648 #define elf_backend_finish_dynamic_sections \
8649 elfNN_aarch64_finish_dynamic_sections
8651 #define elf_backend_finish_dynamic_symbol \
8652 elfNN_aarch64_finish_dynamic_symbol
8654 #define elf_backend_gc_sweep_hook \
8655 elfNN_aarch64_gc_sweep_hook
8657 #define elf_backend_object_p \
8658 elfNN_aarch64_object_p
8660 #define elf_backend_output_arch_local_syms \
8661 elfNN_aarch64_output_arch_local_syms
8663 #define elf_backend_plt_sym_val \
8664 elfNN_aarch64_plt_sym_val
8666 #define elf_backend_post_process_headers \
8667 elfNN_aarch64_post_process_headers
8669 #define elf_backend_relocate_section \
8670 elfNN_aarch64_relocate_section
8672 #define elf_backend_reloc_type_class \
8673 elfNN_aarch64_reloc_type_class
8675 #define elf_backend_section_from_shdr \
8676 elfNN_aarch64_section_from_shdr
8678 #define elf_backend_size_dynamic_sections \
8679 elfNN_aarch64_size_dynamic_sections
8681 #define elf_backend_size_info \
8682 elfNN_aarch64_size_info
8684 #define elf_backend_write_section \
8685 elfNN_aarch64_write_section
8687 #define elf_backend_can_refcount 1
8688 #define elf_backend_can_gc_sections 1
8689 #define elf_backend_plt_readonly 1
8690 #define elf_backend_want_got_plt 1
8691 #define elf_backend_want_plt_sym 0
8692 #define elf_backend_may_use_rel_p 0
8693 #define elf_backend_may_use_rela_p 1
8694 #define elf_backend_default_use_rela_p 1
8695 #define elf_backend_rela_normal 1
8696 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
8697 #define elf_backend_default_execstack 0
8698 #define elf_backend_extern_protected_data 1
8700 #undef elf_backend_obj_attrs_section
8701 #define elf_backend_obj_attrs_section ".ARM.attributes"
8703 #include "elfNN-target.h"
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