1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2014 Free Software Foundation, Inc.
3 Contributed by ARM Ltd.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not,
19 see <http://www.gnu.org/licenses/>. */
21 /* Notes on implementation:
23 Thread Local Store (TLS)
27 The implementation currently supports both traditional TLS and TLS
28 descriptors, but only general dynamic (GD).
30 For traditional TLS the assembler will present us with code
31 fragments of the form:
34 R_AARCH64_TLSGD_ADR_PAGE21(foo)
35 add x0, :tlsgd_lo12:foo
36 R_AARCH64_TLSGD_ADD_LO12_NC(foo)
40 For TLS descriptors the assembler will present us with code
41 fragments of the form:
43 adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE21(foo)
44 ldr x1, [x0, #:tlsdesc_lo12:foo] R_AARCH64_TLSDESC_LD64_LO12(foo)
45 add x0, x0, #:tlsdesc_lo12:foo R_AARCH64_TLSDESC_ADD_LO12(foo)
47 blr x1 R_AARCH64_TLSDESC_CALL(foo)
49 The relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} against foo
50 indicate that foo is thread local and should be accessed via the
51 traditional TLS mechanims.
53 The relocations R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC}
54 against foo indicate that 'foo' is thread local and should be accessed
55 via a TLS descriptor mechanism.
57 The precise instruction sequence is only relevant from the
58 perspective of linker relaxation which is currently not implemented.
60 The static linker must detect that 'foo' is a TLS object and
61 allocate a double GOT entry. The GOT entry must be created for both
62 global and local TLS symbols. Note that this is different to none
63 TLS local objects which do not need a GOT entry.
65 In the traditional TLS mechanism, the double GOT entry is used to
66 provide the tls_index structure, containing module and offset
67 entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD
68 on the module entry. The loader will subsequently fixup this
69 relocation with the module identity.
71 For global traditional TLS symbols the static linker places an
72 R_AARCH64_TLS_DTPREL relocation on the offset entry. The loader
73 will subsequently fixup the offset. For local TLS symbols the static
74 linker fixes up offset.
76 In the TLS descriptor mechanism the double GOT entry is used to
77 provide the descriptor. The static linker places the relocation
78 R_AARCH64_TLSDESC on the first GOT slot. The loader will
79 subsequently fix this up.
83 The handling of TLS symbols is implemented across a number of
84 different backend functions. The following is a top level view of
85 what processing is performed where.
87 The TLS implementation maintains state information for each TLS
88 symbol. The state information for local and global symbols is kept
89 in different places. Global symbols use generic BFD structures while
90 local symbols use backend specific structures that are allocated and
91 maintained entirely by the backend.
95 elfNN_aarch64_check_relocs()
97 This function is invoked for each relocation.
99 The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and
100 R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} are
101 spotted. One time creation of local symbol data structures are
102 created when the first local symbol is seen.
104 The reference count for a symbol is incremented. The GOT type for
105 each symbol is marked as general dynamic.
107 elfNN_aarch64_allocate_dynrelocs ()
109 For each global with positive reference count we allocate a double
110 GOT slot. For a traditional TLS symbol we allocate space for two
111 relocation entries on the GOT, for a TLS descriptor symbol we
112 allocate space for one relocation on the slot. Record the GOT offset
115 elfNN_aarch64_size_dynamic_sections ()
117 Iterate all input BFDS, look for in the local symbol data structure
118 constructed earlier for local TLS symbols and allocate them double
119 GOT slots along with space for a single GOT relocation. Update the
120 local symbol structure to record the GOT offset allocated.
122 elfNN_aarch64_relocate_section ()
124 Calls elfNN_aarch64_final_link_relocate ()
126 Emit the relevant TLS relocations against the GOT for each TLS
127 symbol. For local TLS symbols emit the GOT offset directly. The GOT
128 relocations are emitted once the first time a TLS symbol is
129 encountered. The implementation uses the LSB of the GOT offset to
130 flag that the relevant GOT relocations for a symbol have been
131 emitted. All of the TLS code that uses the GOT offset needs to take
132 care to mask out this flag bit before using the offset.
134 elfNN_aarch64_final_link_relocate ()
136 Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */
140 #include "libiberty.h"
142 #include "bfd_stdint.h"
145 #include "objalloc.h"
146 #include "elf/aarch64.h"
147 #include "elfxx-aarch64.h"
152 #define AARCH64_R(NAME) R_AARCH64_ ## NAME
153 #define AARCH64_R_STR(NAME) "R_AARCH64_" #NAME
154 #define HOWTO64(...) HOWTO (__VA_ARGS__)
155 #define HOWTO32(...) EMPTY_HOWTO (0)
156 #define LOG_FILE_ALIGN 3
160 #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
161 #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME
162 #define HOWTO64(...) EMPTY_HOWTO (0)
163 #define HOWTO32(...) HOWTO (__VA_ARGS__)
164 #define LOG_FILE_ALIGN 2
167 #define IS_AARCH64_TLS_RELOC(R_TYPE) \
168 ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
169 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
170 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
171 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_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_TLS_DTPMOD \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
186 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
187 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
189 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
190 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
191 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
192 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
193 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
194 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \
195 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
201 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC)
203 #define ELIMINATE_COPY_RELOCS 0
205 /* Return size of a relocation entry. HTAB is the bfd's
206 elf_aarch64_link_hash_entry. */
207 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
209 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
210 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
211 #define PLT_ENTRY_SIZE (32)
212 #define PLT_SMALL_ENTRY_SIZE (16)
213 #define PLT_TLSDESC_ENTRY_SIZE (32)
215 /* Encoding of the nop instruction */
216 #define INSN_NOP 0xd503201f
218 #define aarch64_compute_jump_table_size(htab) \
219 (((htab)->root.srelplt == NULL) ? 0 \
220 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
222 /* The first entry in a procedure linkage table looks like this
223 if the distance between the PLTGOT and the PLT is < 4GB use
224 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
225 in x16 and needs to work out PLTGOT[1] by using an address of
226 [x16,#-GOT_ENTRY_SIZE]. */
227 static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] =
229 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
230 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
232 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
233 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
235 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
236 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
238 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
239 0x1f, 0x20, 0x03, 0xd5, /* nop */
240 0x1f, 0x20, 0x03, 0xd5, /* nop */
241 0x1f, 0x20, 0x03, 0xd5, /* nop */
244 /* Per function entry in a procedure linkage table looks like this
245 if the distance between the PLTGOT and the PLT is < 4GB use
246 these PLT entries. */
247 static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] =
249 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
251 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
252 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
254 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
255 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
257 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
260 static const bfd_byte
261 elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
263 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
264 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
265 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
267 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
268 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
270 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
271 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
273 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
274 0x1f, 0x20, 0x03, 0xd5, /* nop */
275 0x1f, 0x20, 0x03, 0xd5, /* nop */
278 #define elf_info_to_howto elfNN_aarch64_info_to_howto
279 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
281 #define AARCH64_ELF_ABI_VERSION 0
283 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
284 #define ALL_ONES (~ (bfd_vma) 0)
286 /* Indexed by the bfd interal reloc enumerators.
287 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
290 static reloc_howto_type elfNN_aarch64_howto_table[] =
294 /* Basic data relocations. */
297 HOWTO (R_AARCH64_NULL, /* type */
299 0, /* size (0 = byte, 1 = short, 2 = long) */
301 FALSE, /* pc_relative */
303 complain_overflow_dont, /* complain_on_overflow */
304 bfd_elf_generic_reloc, /* special_function */
305 "R_AARCH64_NULL", /* name */
306 FALSE, /* partial_inplace */
309 FALSE), /* pcrel_offset */
311 HOWTO (R_AARCH64_NONE, /* type */
313 0, /* size (0 = byte, 1 = short, 2 = long) */
315 FALSE, /* pc_relative */
317 complain_overflow_dont, /* complain_on_overflow */
318 bfd_elf_generic_reloc, /* special_function */
319 "R_AARCH64_NONE", /* name */
320 FALSE, /* partial_inplace */
323 FALSE), /* pcrel_offset */
327 HOWTO64 (AARCH64_R (ABS64), /* type */
329 4, /* size (4 = long long) */
331 FALSE, /* pc_relative */
333 complain_overflow_unsigned, /* complain_on_overflow */
334 bfd_elf_generic_reloc, /* special_function */
335 AARCH64_R_STR (ABS64), /* name */
336 FALSE, /* partial_inplace */
337 ALL_ONES, /* src_mask */
338 ALL_ONES, /* dst_mask */
339 FALSE), /* pcrel_offset */
342 HOWTO (AARCH64_R (ABS32), /* type */
344 2, /* size (0 = byte, 1 = short, 2 = long) */
346 FALSE, /* pc_relative */
348 complain_overflow_unsigned, /* complain_on_overflow */
349 bfd_elf_generic_reloc, /* special_function */
350 AARCH64_R_STR (ABS32), /* name */
351 FALSE, /* partial_inplace */
352 0xffffffff, /* src_mask */
353 0xffffffff, /* dst_mask */
354 FALSE), /* pcrel_offset */
357 HOWTO (AARCH64_R (ABS16), /* type */
359 1, /* size (0 = byte, 1 = short, 2 = long) */
361 FALSE, /* pc_relative */
363 complain_overflow_unsigned, /* complain_on_overflow */
364 bfd_elf_generic_reloc, /* special_function */
365 AARCH64_R_STR (ABS16), /* name */
366 FALSE, /* partial_inplace */
367 0xffff, /* src_mask */
368 0xffff, /* dst_mask */
369 FALSE), /* pcrel_offset */
371 /* .xword: (S+A-P) */
372 HOWTO64 (AARCH64_R (PREL64), /* type */
374 4, /* size (4 = long long) */
376 TRUE, /* pc_relative */
378 complain_overflow_signed, /* complain_on_overflow */
379 bfd_elf_generic_reloc, /* special_function */
380 AARCH64_R_STR (PREL64), /* name */
381 FALSE, /* partial_inplace */
382 ALL_ONES, /* src_mask */
383 ALL_ONES, /* dst_mask */
384 TRUE), /* pcrel_offset */
387 HOWTO (AARCH64_R (PREL32), /* type */
389 2, /* size (0 = byte, 1 = short, 2 = long) */
391 TRUE, /* pc_relative */
393 complain_overflow_signed, /* complain_on_overflow */
394 bfd_elf_generic_reloc, /* special_function */
395 AARCH64_R_STR (PREL32), /* name */
396 FALSE, /* partial_inplace */
397 0xffffffff, /* src_mask */
398 0xffffffff, /* dst_mask */
399 TRUE), /* pcrel_offset */
402 HOWTO (AARCH64_R (PREL16), /* type */
404 1, /* size (0 = byte, 1 = short, 2 = long) */
406 TRUE, /* pc_relative */
408 complain_overflow_signed, /* complain_on_overflow */
409 bfd_elf_generic_reloc, /* special_function */
410 AARCH64_R_STR (PREL16), /* name */
411 FALSE, /* partial_inplace */
412 0xffff, /* src_mask */
413 0xffff, /* dst_mask */
414 TRUE), /* pcrel_offset */
416 /* Group relocations to create a 16, 32, 48 or 64 bit
417 unsigned data or abs address inline. */
419 /* MOVZ: ((S+A) >> 0) & 0xffff */
420 HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
422 2, /* size (0 = byte, 1 = short, 2 = long) */
424 FALSE, /* pc_relative */
426 complain_overflow_unsigned, /* complain_on_overflow */
427 bfd_elf_generic_reloc, /* special_function */
428 AARCH64_R_STR (MOVW_UABS_G0), /* name */
429 FALSE, /* partial_inplace */
430 0xffff, /* src_mask */
431 0xffff, /* dst_mask */
432 FALSE), /* pcrel_offset */
434 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
435 HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
437 2, /* size (0 = byte, 1 = short, 2 = long) */
439 FALSE, /* pc_relative */
441 complain_overflow_dont, /* complain_on_overflow */
442 bfd_elf_generic_reloc, /* special_function */
443 AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */
444 FALSE, /* partial_inplace */
445 0xffff, /* src_mask */
446 0xffff, /* dst_mask */
447 FALSE), /* pcrel_offset */
449 /* MOVZ: ((S+A) >> 16) & 0xffff */
450 HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
452 2, /* size (0 = byte, 1 = short, 2 = long) */
454 FALSE, /* pc_relative */
456 complain_overflow_unsigned, /* complain_on_overflow */
457 bfd_elf_generic_reloc, /* special_function */
458 AARCH64_R_STR (MOVW_UABS_G1), /* name */
459 FALSE, /* partial_inplace */
460 0xffff, /* src_mask */
461 0xffff, /* dst_mask */
462 FALSE), /* pcrel_offset */
464 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
465 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
467 2, /* size (0 = byte, 1 = short, 2 = long) */
469 FALSE, /* pc_relative */
471 complain_overflow_dont, /* complain_on_overflow */
472 bfd_elf_generic_reloc, /* special_function */
473 AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */
474 FALSE, /* partial_inplace */
475 0xffff, /* src_mask */
476 0xffff, /* dst_mask */
477 FALSE), /* pcrel_offset */
479 /* MOVZ: ((S+A) >> 32) & 0xffff */
480 HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
482 2, /* size (0 = byte, 1 = short, 2 = long) */
484 FALSE, /* pc_relative */
486 complain_overflow_unsigned, /* complain_on_overflow */
487 bfd_elf_generic_reloc, /* special_function */
488 AARCH64_R_STR (MOVW_UABS_G2), /* name */
489 FALSE, /* partial_inplace */
490 0xffff, /* src_mask */
491 0xffff, /* dst_mask */
492 FALSE), /* pcrel_offset */
494 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
495 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
497 2, /* size (0 = byte, 1 = short, 2 = long) */
499 FALSE, /* pc_relative */
501 complain_overflow_dont, /* complain_on_overflow */
502 bfd_elf_generic_reloc, /* special_function */
503 AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */
504 FALSE, /* partial_inplace */
505 0xffff, /* src_mask */
506 0xffff, /* dst_mask */
507 FALSE), /* pcrel_offset */
509 /* MOVZ: ((S+A) >> 48) & 0xffff */
510 HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
512 2, /* size (0 = byte, 1 = short, 2 = long) */
514 FALSE, /* pc_relative */
516 complain_overflow_unsigned, /* complain_on_overflow */
517 bfd_elf_generic_reloc, /* special_function */
518 AARCH64_R_STR (MOVW_UABS_G3), /* name */
519 FALSE, /* partial_inplace */
520 0xffff, /* src_mask */
521 0xffff, /* dst_mask */
522 FALSE), /* pcrel_offset */
524 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
525 signed data or abs address inline. Will change instruction
526 to MOVN or MOVZ depending on sign of calculated value. */
528 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
529 HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
531 2, /* size (0 = byte, 1 = short, 2 = long) */
533 FALSE, /* pc_relative */
535 complain_overflow_signed, /* complain_on_overflow */
536 bfd_elf_generic_reloc, /* special_function */
537 AARCH64_R_STR (MOVW_SABS_G0), /* name */
538 FALSE, /* partial_inplace */
539 0xffff, /* src_mask */
540 0xffff, /* dst_mask */
541 FALSE), /* pcrel_offset */
543 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
544 HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
546 2, /* size (0 = byte, 1 = short, 2 = long) */
548 FALSE, /* pc_relative */
550 complain_overflow_signed, /* complain_on_overflow */
551 bfd_elf_generic_reloc, /* special_function */
552 AARCH64_R_STR (MOVW_SABS_G1), /* name */
553 FALSE, /* partial_inplace */
554 0xffff, /* src_mask */
555 0xffff, /* dst_mask */
556 FALSE), /* pcrel_offset */
558 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
559 HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
561 2, /* size (0 = byte, 1 = short, 2 = long) */
563 FALSE, /* pc_relative */
565 complain_overflow_signed, /* complain_on_overflow */
566 bfd_elf_generic_reloc, /* special_function */
567 AARCH64_R_STR (MOVW_SABS_G2), /* name */
568 FALSE, /* partial_inplace */
569 0xffff, /* src_mask */
570 0xffff, /* dst_mask */
571 FALSE), /* pcrel_offset */
573 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
574 addresses: PG(x) is (x & ~0xfff). */
576 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
577 HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
579 2, /* size (0 = byte, 1 = short, 2 = long) */
581 TRUE, /* pc_relative */
583 complain_overflow_signed, /* complain_on_overflow */
584 bfd_elf_generic_reloc, /* special_function */
585 AARCH64_R_STR (LD_PREL_LO19), /* name */
586 FALSE, /* partial_inplace */
587 0x7ffff, /* src_mask */
588 0x7ffff, /* dst_mask */
589 TRUE), /* pcrel_offset */
591 /* ADR: (S+A-P) & 0x1fffff */
592 HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
594 2, /* size (0 = byte, 1 = short, 2 = long) */
596 TRUE, /* pc_relative */
598 complain_overflow_signed, /* complain_on_overflow */
599 bfd_elf_generic_reloc, /* special_function */
600 AARCH64_R_STR (ADR_PREL_LO21), /* name */
601 FALSE, /* partial_inplace */
602 0x1fffff, /* src_mask */
603 0x1fffff, /* dst_mask */
604 TRUE), /* pcrel_offset */
606 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
607 HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
609 2, /* size (0 = byte, 1 = short, 2 = long) */
611 TRUE, /* pc_relative */
613 complain_overflow_signed, /* complain_on_overflow */
614 bfd_elf_generic_reloc, /* special_function */
615 AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */
616 FALSE, /* partial_inplace */
617 0x1fffff, /* src_mask */
618 0x1fffff, /* dst_mask */
619 TRUE), /* pcrel_offset */
621 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
622 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
624 2, /* size (0 = byte, 1 = short, 2 = long) */
626 TRUE, /* pc_relative */
628 complain_overflow_dont, /* complain_on_overflow */
629 bfd_elf_generic_reloc, /* special_function */
630 AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */
631 FALSE, /* partial_inplace */
632 0x1fffff, /* src_mask */
633 0x1fffff, /* dst_mask */
634 TRUE), /* pcrel_offset */
636 /* ADD: (S+A) & 0xfff [no overflow check] */
637 HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
639 2, /* size (0 = byte, 1 = short, 2 = long) */
641 FALSE, /* pc_relative */
643 complain_overflow_dont, /* complain_on_overflow */
644 bfd_elf_generic_reloc, /* special_function */
645 AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */
646 FALSE, /* partial_inplace */
647 0x3ffc00, /* src_mask */
648 0x3ffc00, /* dst_mask */
649 FALSE), /* pcrel_offset */
651 /* LD/ST8: (S+A) & 0xfff */
652 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
654 2, /* size (0 = byte, 1 = short, 2 = long) */
656 FALSE, /* pc_relative */
658 complain_overflow_dont, /* complain_on_overflow */
659 bfd_elf_generic_reloc, /* special_function */
660 AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */
661 FALSE, /* partial_inplace */
662 0xfff, /* src_mask */
663 0xfff, /* dst_mask */
664 FALSE), /* pcrel_offset */
666 /* Relocations for control-flow instructions. */
668 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
669 HOWTO (AARCH64_R (TSTBR14), /* type */
671 2, /* size (0 = byte, 1 = short, 2 = long) */
673 TRUE, /* pc_relative */
675 complain_overflow_signed, /* complain_on_overflow */
676 bfd_elf_generic_reloc, /* special_function */
677 AARCH64_R_STR (TSTBR14), /* name */
678 FALSE, /* partial_inplace */
679 0x3fff, /* src_mask */
680 0x3fff, /* dst_mask */
681 TRUE), /* pcrel_offset */
683 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
684 HOWTO (AARCH64_R (CONDBR19), /* type */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
688 TRUE, /* pc_relative */
690 complain_overflow_signed, /* complain_on_overflow */
691 bfd_elf_generic_reloc, /* special_function */
692 AARCH64_R_STR (CONDBR19), /* name */
693 FALSE, /* partial_inplace */
694 0x7ffff, /* src_mask */
695 0x7ffff, /* dst_mask */
696 TRUE), /* pcrel_offset */
698 /* B: ((S+A-P) >> 2) & 0x3ffffff */
699 HOWTO (AARCH64_R (JUMP26), /* type */
701 2, /* size (0 = byte, 1 = short, 2 = long) */
703 TRUE, /* pc_relative */
705 complain_overflow_signed, /* complain_on_overflow */
706 bfd_elf_generic_reloc, /* special_function */
707 AARCH64_R_STR (JUMP26), /* name */
708 FALSE, /* partial_inplace */
709 0x3ffffff, /* src_mask */
710 0x3ffffff, /* dst_mask */
711 TRUE), /* pcrel_offset */
713 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
714 HOWTO (AARCH64_R (CALL26), /* type */
716 2, /* size (0 = byte, 1 = short, 2 = long) */
718 TRUE, /* pc_relative */
720 complain_overflow_signed, /* complain_on_overflow */
721 bfd_elf_generic_reloc, /* special_function */
722 AARCH64_R_STR (CALL26), /* name */
723 FALSE, /* partial_inplace */
724 0x3ffffff, /* src_mask */
725 0x3ffffff, /* dst_mask */
726 TRUE), /* pcrel_offset */
728 /* LD/ST16: (S+A) & 0xffe */
729 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
731 2, /* size (0 = byte, 1 = short, 2 = long) */
733 FALSE, /* pc_relative */
735 complain_overflow_dont, /* complain_on_overflow */
736 bfd_elf_generic_reloc, /* special_function */
737 AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */
738 FALSE, /* partial_inplace */
739 0xffe, /* src_mask */
740 0xffe, /* dst_mask */
741 FALSE), /* pcrel_offset */
743 /* LD/ST32: (S+A) & 0xffc */
744 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
746 2, /* size (0 = byte, 1 = short, 2 = long) */
748 FALSE, /* pc_relative */
750 complain_overflow_dont, /* complain_on_overflow */
751 bfd_elf_generic_reloc, /* special_function */
752 AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */
753 FALSE, /* partial_inplace */
754 0xffc, /* src_mask */
755 0xffc, /* dst_mask */
756 FALSE), /* pcrel_offset */
758 /* LD/ST64: (S+A) & 0xff8 */
759 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
761 2, /* size (0 = byte, 1 = short, 2 = long) */
763 FALSE, /* pc_relative */
765 complain_overflow_dont, /* complain_on_overflow */
766 bfd_elf_generic_reloc, /* special_function */
767 AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */
768 FALSE, /* partial_inplace */
769 0xff8, /* src_mask */
770 0xff8, /* dst_mask */
771 FALSE), /* pcrel_offset */
773 /* LD/ST128: (S+A) & 0xff0 */
774 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
776 2, /* size (0 = byte, 1 = short, 2 = long) */
778 FALSE, /* pc_relative */
780 complain_overflow_dont, /* complain_on_overflow */
781 bfd_elf_generic_reloc, /* special_function */
782 AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */
783 FALSE, /* partial_inplace */
784 0xff0, /* src_mask */
785 0xff0, /* dst_mask */
786 FALSE), /* pcrel_offset */
788 /* Set a load-literal immediate field to bits
789 0x1FFFFC of G(S)-P */
790 HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
792 2, /* size (0 = byte,1 = short,2 = long) */
794 TRUE, /* pc_relative */
796 complain_overflow_signed, /* complain_on_overflow */
797 bfd_elf_generic_reloc, /* special_function */
798 AARCH64_R_STR (GOT_LD_PREL19), /* name */
799 FALSE, /* partial_inplace */
800 0xffffe0, /* src_mask */
801 0xffffe0, /* dst_mask */
802 TRUE), /* pcrel_offset */
804 /* Get to the page for the GOT entry for the symbol
805 (G(S) - P) using an ADRP instruction. */
806 HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */
808 2, /* size (0 = byte, 1 = short, 2 = long) */
810 TRUE, /* pc_relative */
812 complain_overflow_dont, /* complain_on_overflow */
813 bfd_elf_generic_reloc, /* special_function */
814 AARCH64_R_STR (ADR_GOT_PAGE), /* name */
815 FALSE, /* partial_inplace */
816 0x1fffff, /* src_mask */
817 0x1fffff, /* dst_mask */
818 TRUE), /* pcrel_offset */
820 /* LD64: GOT offset G(S) & 0xff8 */
821 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
823 2, /* size (0 = byte, 1 = short, 2 = long) */
825 FALSE, /* pc_relative */
827 complain_overflow_dont, /* complain_on_overflow */
828 bfd_elf_generic_reloc, /* special_function */
829 AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */
830 FALSE, /* partial_inplace */
831 0xff8, /* src_mask */
832 0xff8, /* dst_mask */
833 FALSE), /* pcrel_offset */
835 /* LD32: GOT offset G(S) & 0xffc */
836 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
838 2, /* size (0 = byte, 1 = short, 2 = long) */
840 FALSE, /* pc_relative */
842 complain_overflow_dont, /* complain_on_overflow */
843 bfd_elf_generic_reloc, /* special_function */
844 AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */
845 FALSE, /* partial_inplace */
846 0xffc, /* src_mask */
847 0xffc, /* dst_mask */
848 FALSE), /* pcrel_offset */
850 /* Get to the page for the GOT entry for the symbol
851 (G(S) - P) using an ADRP instruction. */
852 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */
854 2, /* size (0 = byte, 1 = short, 2 = long) */
856 TRUE, /* pc_relative */
858 complain_overflow_dont, /* complain_on_overflow */
859 bfd_elf_generic_reloc, /* special_function */
860 AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */
861 FALSE, /* partial_inplace */
862 0x1fffff, /* src_mask */
863 0x1fffff, /* dst_mask */
864 TRUE), /* pcrel_offset */
866 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
867 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
869 2, /* size (0 = byte, 1 = short, 2 = long) */
871 FALSE, /* pc_relative */
873 complain_overflow_dont, /* complain_on_overflow */
874 bfd_elf_generic_reloc, /* special_function */
875 AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */
876 FALSE, /* partial_inplace */
877 0xfff, /* src_mask */
878 0xfff, /* dst_mask */
879 FALSE), /* pcrel_offset */
881 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
883 2, /* size (0 = byte, 1 = short, 2 = long) */
885 FALSE, /* pc_relative */
887 complain_overflow_dont, /* complain_on_overflow */
888 bfd_elf_generic_reloc, /* special_function */
889 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */
890 FALSE, /* partial_inplace */
891 0xffff, /* src_mask */
892 0xffff, /* dst_mask */
893 FALSE), /* pcrel_offset */
895 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
897 2, /* size (0 = byte, 1 = short, 2 = long) */
899 FALSE, /* pc_relative */
901 complain_overflow_dont, /* complain_on_overflow */
902 bfd_elf_generic_reloc, /* special_function */
903 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */
904 FALSE, /* partial_inplace */
905 0xffff, /* src_mask */
906 0xffff, /* dst_mask */
907 FALSE), /* pcrel_offset */
909 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
911 2, /* size (0 = byte, 1 = short, 2 = long) */
913 FALSE, /* pc_relative */
915 complain_overflow_dont, /* complain_on_overflow */
916 bfd_elf_generic_reloc, /* special_function */
917 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */
918 FALSE, /* partial_inplace */
919 0x1fffff, /* src_mask */
920 0x1fffff, /* dst_mask */
921 FALSE), /* pcrel_offset */
923 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
925 2, /* size (0 = byte, 1 = short, 2 = long) */
927 FALSE, /* pc_relative */
929 complain_overflow_dont, /* complain_on_overflow */
930 bfd_elf_generic_reloc, /* special_function */
931 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */
932 FALSE, /* partial_inplace */
933 0xff8, /* src_mask */
934 0xff8, /* dst_mask */
935 FALSE), /* pcrel_offset */
937 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
939 2, /* size (0 = byte, 1 = short, 2 = long) */
941 FALSE, /* pc_relative */
943 complain_overflow_dont, /* complain_on_overflow */
944 bfd_elf_generic_reloc, /* special_function */
945 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */
946 FALSE, /* partial_inplace */
947 0xffc, /* src_mask */
948 0xffc, /* dst_mask */
949 FALSE), /* pcrel_offset */
951 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
953 2, /* size (0 = byte, 1 = short, 2 = long) */
955 FALSE, /* pc_relative */
957 complain_overflow_dont, /* complain_on_overflow */
958 bfd_elf_generic_reloc, /* special_function */
959 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */
960 FALSE, /* partial_inplace */
961 0x1ffffc, /* src_mask */
962 0x1ffffc, /* dst_mask */
963 FALSE), /* pcrel_offset */
965 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
967 2, /* size (0 = byte, 1 = short, 2 = long) */
969 FALSE, /* pc_relative */
971 complain_overflow_dont, /* complain_on_overflow */
972 bfd_elf_generic_reloc, /* special_function */
973 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */
974 FALSE, /* partial_inplace */
975 0xffff, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
979 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
981 2, /* size (0 = byte, 1 = short, 2 = long) */
983 FALSE, /* pc_relative */
985 complain_overflow_dont, /* complain_on_overflow */
986 bfd_elf_generic_reloc, /* special_function */
987 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */
988 FALSE, /* partial_inplace */
989 0xffff, /* src_mask */
990 0xffff, /* dst_mask */
991 FALSE), /* pcrel_offset */
993 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
995 2, /* size (0 = byte, 1 = short, 2 = long) */
997 FALSE, /* pc_relative */
999 complain_overflow_dont, /* complain_on_overflow */
1000 bfd_elf_generic_reloc, /* special_function */
1001 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */
1002 FALSE, /* partial_inplace */
1003 0xffff, /* src_mask */
1004 0xffff, /* dst_mask */
1005 FALSE), /* pcrel_offset */
1007 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
1009 2, /* size (0 = byte, 1 = short, 2 = long) */
1011 FALSE, /* pc_relative */
1013 complain_overflow_dont, /* complain_on_overflow */
1014 bfd_elf_generic_reloc, /* special_function */
1015 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */
1016 FALSE, /* partial_inplace */
1017 0xffff, /* src_mask */
1018 0xffff, /* dst_mask */
1019 FALSE), /* pcrel_offset */
1021 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
1023 2, /* size (0 = byte, 1 = short, 2 = long) */
1025 FALSE, /* pc_relative */
1027 complain_overflow_dont, /* complain_on_overflow */
1028 bfd_elf_generic_reloc, /* special_function */
1029 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */
1030 FALSE, /* partial_inplace */
1031 0xffff, /* src_mask */
1032 0xffff, /* dst_mask */
1033 FALSE), /* pcrel_offset */
1035 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
1036 12, /* rightshift */
1037 2, /* size (0 = byte, 1 = short, 2 = long) */
1039 FALSE, /* pc_relative */
1041 complain_overflow_dont, /* complain_on_overflow */
1042 bfd_elf_generic_reloc, /* special_function */
1043 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */
1044 FALSE, /* partial_inplace */
1045 0xfff, /* src_mask */
1046 0xfff, /* dst_mask */
1047 FALSE), /* pcrel_offset */
1049 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
1051 2, /* size (0 = byte, 1 = short, 2 = long) */
1053 FALSE, /* pc_relative */
1055 complain_overflow_dont, /* complain_on_overflow */
1056 bfd_elf_generic_reloc, /* special_function */
1057 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */
1058 FALSE, /* partial_inplace */
1059 0xfff, /* src_mask */
1060 0xfff, /* dst_mask */
1061 FALSE), /* pcrel_offset */
1063 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
1065 2, /* size (0 = byte, 1 = short, 2 = long) */
1067 FALSE, /* pc_relative */
1069 complain_overflow_dont, /* complain_on_overflow */
1070 bfd_elf_generic_reloc, /* special_function */
1071 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */
1072 FALSE, /* partial_inplace */
1073 0xfff, /* src_mask */
1074 0xfff, /* dst_mask */
1075 FALSE), /* pcrel_offset */
1077 HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
1079 2, /* size (0 = byte, 1 = short, 2 = long) */
1081 TRUE, /* pc_relative */
1083 complain_overflow_dont, /* complain_on_overflow */
1084 bfd_elf_generic_reloc, /* special_function */
1085 AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */
1086 FALSE, /* partial_inplace */
1087 0x1ffffc, /* src_mask */
1088 0x1ffffc, /* dst_mask */
1089 TRUE), /* pcrel_offset */
1091 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
1093 2, /* size (0 = byte, 1 = short, 2 = long) */
1095 TRUE, /* pc_relative */
1097 complain_overflow_dont, /* complain_on_overflow */
1098 bfd_elf_generic_reloc, /* special_function */
1099 AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */
1100 FALSE, /* partial_inplace */
1101 0x1fffff, /* src_mask */
1102 0x1fffff, /* dst_mask */
1103 TRUE), /* pcrel_offset */
1105 /* Get to the page for the GOT entry for the symbol
1106 (G(S) - P) using an ADRP instruction. */
1107 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */
1108 12, /* rightshift */
1109 2, /* size (0 = byte, 1 = short, 2 = long) */
1111 TRUE, /* pc_relative */
1113 complain_overflow_dont, /* complain_on_overflow */
1114 bfd_elf_generic_reloc, /* special_function */
1115 AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */
1116 FALSE, /* partial_inplace */
1117 0x1fffff, /* src_mask */
1118 0x1fffff, /* dst_mask */
1119 TRUE), /* pcrel_offset */
1121 /* LD64: GOT offset G(S) & 0xff8. */
1122 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */
1124 2, /* size (0 = byte, 1 = short, 2 = long) */
1126 FALSE, /* pc_relative */
1128 complain_overflow_dont, /* complain_on_overflow */
1129 bfd_elf_generic_reloc, /* special_function */
1130 AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */
1131 FALSE, /* partial_inplace */
1132 0xff8, /* src_mask */
1133 0xff8, /* dst_mask */
1134 FALSE), /* pcrel_offset */
1136 /* LD32: GOT offset G(S) & 0xffc. */
1137 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
1139 2, /* size (0 = byte, 1 = short, 2 = long) */
1141 FALSE, /* pc_relative */
1143 complain_overflow_dont, /* complain_on_overflow */
1144 bfd_elf_generic_reloc, /* special_function */
1145 AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */
1146 FALSE, /* partial_inplace */
1147 0xffc, /* src_mask */
1148 0xffc, /* dst_mask */
1149 FALSE), /* pcrel_offset */
1151 /* ADD: GOT offset G(S) & 0xfff. */
1152 HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */
1154 2, /* size (0 = byte, 1 = short, 2 = long) */
1156 FALSE, /* pc_relative */
1158 complain_overflow_dont, /* complain_on_overflow */
1159 bfd_elf_generic_reloc, /* special_function */
1160 AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */
1161 FALSE, /* partial_inplace */
1162 0xfff, /* src_mask */
1163 0xfff, /* dst_mask */
1164 FALSE), /* pcrel_offset */
1166 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
1167 16, /* rightshift */
1168 2, /* size (0 = byte, 1 = short, 2 = long) */
1170 FALSE, /* pc_relative */
1172 complain_overflow_dont, /* complain_on_overflow */
1173 bfd_elf_generic_reloc, /* special_function */
1174 AARCH64_R_STR (TLSDESC_OFF_G1), /* name */
1175 FALSE, /* partial_inplace */
1176 0xffff, /* src_mask */
1177 0xffff, /* dst_mask */
1178 FALSE), /* pcrel_offset */
1180 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
1182 2, /* size (0 = byte, 1 = short, 2 = long) */
1184 FALSE, /* pc_relative */
1186 complain_overflow_dont, /* complain_on_overflow */
1187 bfd_elf_generic_reloc, /* special_function */
1188 AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */
1189 FALSE, /* partial_inplace */
1190 0xffff, /* src_mask */
1191 0xffff, /* dst_mask */
1192 FALSE), /* pcrel_offset */
1194 HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
1196 2, /* size (0 = byte, 1 = short, 2 = long) */
1198 FALSE, /* pc_relative */
1200 complain_overflow_dont, /* complain_on_overflow */
1201 bfd_elf_generic_reloc, /* special_function */
1202 AARCH64_R_STR (TLSDESC_LDR), /* name */
1203 FALSE, /* partial_inplace */
1206 FALSE), /* pcrel_offset */
1208 HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
1210 2, /* size (0 = byte, 1 = short, 2 = long) */
1212 FALSE, /* pc_relative */
1214 complain_overflow_dont, /* complain_on_overflow */
1215 bfd_elf_generic_reloc, /* special_function */
1216 AARCH64_R_STR (TLSDESC_ADD), /* name */
1217 FALSE, /* partial_inplace */
1220 FALSE), /* pcrel_offset */
1222 HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
1224 2, /* size (0 = byte, 1 = short, 2 = long) */
1226 FALSE, /* pc_relative */
1228 complain_overflow_dont, /* complain_on_overflow */
1229 bfd_elf_generic_reloc, /* special_function */
1230 AARCH64_R_STR (TLSDESC_CALL), /* name */
1231 FALSE, /* partial_inplace */
1234 FALSE), /* pcrel_offset */
1236 HOWTO (AARCH64_R (COPY), /* type */
1238 2, /* size (0 = byte, 1 = short, 2 = long) */
1240 FALSE, /* pc_relative */
1242 complain_overflow_bitfield, /* complain_on_overflow */
1243 bfd_elf_generic_reloc, /* special_function */
1244 AARCH64_R_STR (COPY), /* name */
1245 TRUE, /* partial_inplace */
1246 0xffffffff, /* src_mask */
1247 0xffffffff, /* dst_mask */
1248 FALSE), /* pcrel_offset */
1250 HOWTO (AARCH64_R (GLOB_DAT), /* type */
1252 2, /* size (0 = byte, 1 = short, 2 = long) */
1254 FALSE, /* pc_relative */
1256 complain_overflow_bitfield, /* complain_on_overflow */
1257 bfd_elf_generic_reloc, /* special_function */
1258 AARCH64_R_STR (GLOB_DAT), /* name */
1259 TRUE, /* partial_inplace */
1260 0xffffffff, /* src_mask */
1261 0xffffffff, /* dst_mask */
1262 FALSE), /* pcrel_offset */
1264 HOWTO (AARCH64_R (JUMP_SLOT), /* type */
1266 2, /* size (0 = byte, 1 = short, 2 = long) */
1268 FALSE, /* pc_relative */
1270 complain_overflow_bitfield, /* complain_on_overflow */
1271 bfd_elf_generic_reloc, /* special_function */
1272 AARCH64_R_STR (JUMP_SLOT), /* name */
1273 TRUE, /* partial_inplace */
1274 0xffffffff, /* src_mask */
1275 0xffffffff, /* dst_mask */
1276 FALSE), /* pcrel_offset */
1278 HOWTO (AARCH64_R (RELATIVE), /* type */
1280 2, /* size (0 = byte, 1 = short, 2 = long) */
1282 FALSE, /* pc_relative */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 AARCH64_R_STR (RELATIVE), /* name */
1287 TRUE, /* partial_inplace */
1288 ALL_ONES, /* src_mask */
1289 ALL_ONES, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1292 HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
1294 2, /* size (0 = byte, 1 = short, 2 = long) */
1296 FALSE, /* pc_relative */
1298 complain_overflow_dont, /* complain_on_overflow */
1299 bfd_elf_generic_reloc, /* special_function */
1301 AARCH64_R_STR (TLS_DTPMOD64), /* name */
1303 AARCH64_R_STR (TLS_DTPMOD), /* name */
1305 FALSE, /* partial_inplace */
1307 ALL_ONES, /* dst_mask */
1308 FALSE), /* pc_reloffset */
1310 HOWTO (AARCH64_R (TLS_DTPREL), /* type */
1312 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 FALSE, /* pc_relative */
1316 complain_overflow_dont, /* complain_on_overflow */
1317 bfd_elf_generic_reloc, /* special_function */
1319 AARCH64_R_STR (TLS_DTPREL64), /* name */
1321 AARCH64_R_STR (TLS_DTPREL), /* name */
1323 FALSE, /* partial_inplace */
1325 ALL_ONES, /* dst_mask */
1326 FALSE), /* pcrel_offset */
1328 HOWTO (AARCH64_R (TLS_TPREL), /* type */
1330 2, /* size (0 = byte, 1 = short, 2 = long) */
1332 FALSE, /* pc_relative */
1334 complain_overflow_dont, /* complain_on_overflow */
1335 bfd_elf_generic_reloc, /* special_function */
1337 AARCH64_R_STR (TLS_TPREL64), /* name */
1339 AARCH64_R_STR (TLS_TPREL), /* name */
1341 FALSE, /* partial_inplace */
1343 ALL_ONES, /* dst_mask */
1344 FALSE), /* pcrel_offset */
1346 HOWTO (AARCH64_R (TLSDESC), /* type */
1348 2, /* size (0 = byte, 1 = short, 2 = long) */
1350 FALSE, /* pc_relative */
1352 complain_overflow_dont, /* complain_on_overflow */
1353 bfd_elf_generic_reloc, /* special_function */
1354 AARCH64_R_STR (TLSDESC), /* name */
1355 FALSE, /* partial_inplace */
1357 ALL_ONES, /* dst_mask */
1358 FALSE), /* pcrel_offset */
1360 HOWTO (AARCH64_R (IRELATIVE), /* type */
1362 2, /* size (0 = byte, 1 = short, 2 = long) */
1364 FALSE, /* pc_relative */
1366 complain_overflow_bitfield, /* complain_on_overflow */
1367 bfd_elf_generic_reloc, /* special_function */
1368 AARCH64_R_STR (IRELATIVE), /* name */
1369 FALSE, /* partial_inplace */
1371 ALL_ONES, /* dst_mask */
1372 FALSE), /* pcrel_offset */
1377 static reloc_howto_type elfNN_aarch64_howto_none =
1378 HOWTO (R_AARCH64_NONE, /* type */
1380 0, /* size (0 = byte, 1 = short, 2 = long) */
1382 FALSE, /* pc_relative */
1384 complain_overflow_dont,/* complain_on_overflow */
1385 bfd_elf_generic_reloc, /* special_function */
1386 "R_AARCH64_NONE", /* name */
1387 FALSE, /* partial_inplace */
1390 FALSE); /* pcrel_offset */
1392 /* Given HOWTO, return the bfd internal relocation enumerator. */
1394 static bfd_reloc_code_real_type
1395 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
1398 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
1399 const ptrdiff_t offset
1400 = howto - elfNN_aarch64_howto_table;
1402 if (offset > 0 && offset < size - 1)
1403 return BFD_RELOC_AARCH64_RELOC_START + offset;
1405 if (howto == &elfNN_aarch64_howto_none)
1406 return BFD_RELOC_AARCH64_NONE;
1408 return BFD_RELOC_AARCH64_RELOC_START;
1411 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1413 static bfd_reloc_code_real_type
1414 elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type)
1416 static bfd_boolean initialized_p = FALSE;
1417 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1418 static unsigned int offsets[R_AARCH64_end];
1420 if (initialized_p == FALSE)
1424 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1425 if (elfNN_aarch64_howto_table[i].type != 0)
1426 offsets[elfNN_aarch64_howto_table[i].type] = i;
1428 initialized_p = TRUE;
1431 if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
1432 return BFD_RELOC_AARCH64_NONE;
1434 return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
1437 struct elf_aarch64_reloc_map
1439 bfd_reloc_code_real_type from;
1440 bfd_reloc_code_real_type to;
1443 /* Map bfd generic reloc to AArch64-specific reloc. */
1444 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
1446 {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
1448 /* Basic data relocations. */
1449 {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN},
1450 {BFD_RELOC_64, BFD_RELOC_AARCH64_64},
1451 {BFD_RELOC_32, BFD_RELOC_AARCH64_32},
1452 {BFD_RELOC_16, BFD_RELOC_AARCH64_16},
1453 {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL},
1454 {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL},
1455 {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL},
1458 /* Given the bfd internal relocation enumerator in CODE, return the
1459 corresponding howto entry. */
1461 static reloc_howto_type *
1462 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
1466 /* Convert bfd generic reloc to AArch64-specific reloc. */
1467 if (code < BFD_RELOC_AARCH64_RELOC_START
1468 || code > BFD_RELOC_AARCH64_RELOC_END)
1469 for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++)
1470 if (elf_aarch64_reloc_map[i].from == code)
1472 code = elf_aarch64_reloc_map[i].to;
1476 if (code > BFD_RELOC_AARCH64_RELOC_START
1477 && code < BFD_RELOC_AARCH64_RELOC_END)
1478 if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type)
1479 return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START];
1481 if (code == BFD_RELOC_AARCH64_NONE)
1482 return &elfNN_aarch64_howto_none;
1487 static reloc_howto_type *
1488 elfNN_aarch64_howto_from_type (unsigned int r_type)
1490 bfd_reloc_code_real_type val;
1491 reloc_howto_type *howto;
1496 bfd_set_error (bfd_error_bad_value);
1501 if (r_type == R_AARCH64_NONE)
1502 return &elfNN_aarch64_howto_none;
1504 val = elfNN_aarch64_bfd_reloc_from_type (r_type);
1505 howto = elfNN_aarch64_howto_from_bfd_reloc (val);
1510 bfd_set_error (bfd_error_bad_value);
1515 elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
1516 Elf_Internal_Rela *elf_reloc)
1518 unsigned int r_type;
1520 r_type = ELFNN_R_TYPE (elf_reloc->r_info);
1521 bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type);
1524 static reloc_howto_type *
1525 elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1526 bfd_reloc_code_real_type code)
1528 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
1533 bfd_set_error (bfd_error_bad_value);
1537 static reloc_howto_type *
1538 elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1543 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1544 if (elfNN_aarch64_howto_table[i].name != NULL
1545 && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0)
1546 return &elfNN_aarch64_howto_table[i];
1551 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
1552 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
1553 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
1554 #define TARGET_BIG_NAME "elfNN-bigaarch64"
1556 /* The linker script knows the section names for placement.
1557 The entry_names are used to do simple name mangling on the stubs.
1558 Given a function name, and its type, the stub can be found. The
1559 name can be changed. The only requirement is the %s be present. */
1560 #define STUB_ENTRY_NAME "__%s_veneer"
1562 /* The name of the dynamic interpreter. This is put in the .interp
1564 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1566 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
1567 (((1 << 25) - 1) << 2)
1568 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
1571 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
1572 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
1575 aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
1577 bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12;
1578 return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM;
1582 aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
1584 bfd_signed_vma offset = (bfd_signed_vma) (value - place);
1585 return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET
1586 && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET);
1589 static const uint32_t aarch64_adrp_branch_stub [] =
1591 0x90000010, /* adrp ip0, X */
1592 /* R_AARCH64_ADR_HI21_PCREL(X) */
1593 0x91000210, /* add ip0, ip0, :lo12:X */
1594 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
1595 0xd61f0200, /* br ip0 */
1598 static const uint32_t aarch64_long_branch_stub[] =
1601 0x58000090, /* ldr ip0, 1f */
1603 0x18000090, /* ldr wip0, 1f */
1605 0x10000011, /* adr ip1, #0 */
1606 0x8b110210, /* add ip0, ip0, ip1 */
1607 0xd61f0200, /* br ip0 */
1608 0x00000000, /* 1: .xword or .word
1609 R_AARCH64_PRELNN(X) + 12
1614 static const uint32_t aarch64_erratum_835769_stub[] =
1616 0x00000000, /* Placeholder for multiply accumulate. */
1617 0x14000000, /* b <label> */
1620 /* Section name for stubs is the associated section name plus this
1622 #define STUB_SUFFIX ".stub"
1624 enum elf_aarch64_stub_type
1627 aarch64_stub_adrp_branch,
1628 aarch64_stub_long_branch,
1629 aarch64_stub_erratum_835769_veneer,
1632 struct elf_aarch64_stub_hash_entry
1634 /* Base hash table entry structure. */
1635 struct bfd_hash_entry root;
1637 /* The stub section. */
1640 /* Offset within stub_sec of the beginning of this stub. */
1641 bfd_vma stub_offset;
1643 /* Given the symbol's value and its section we can determine its final
1644 value when building the stubs (so the stub knows where to jump). */
1645 bfd_vma target_value;
1646 asection *target_section;
1648 enum elf_aarch64_stub_type stub_type;
1650 /* The symbol table entry, if any, that this was derived from. */
1651 struct elf_aarch64_link_hash_entry *h;
1653 /* Destination symbol type */
1654 unsigned char st_type;
1656 /* Where this stub is being called from, or, in the case of combined
1657 stub sections, the first input section in the group. */
1660 /* The name for the local symbol at the start of this stub. The
1661 stub name in the hash table has to be unique; this does not, so
1662 it can be friendlier. */
1665 /* The instruction which caused this stub to be generated (only valid for
1666 erratum 835769 workaround stubs at present). */
1667 uint32_t veneered_insn;
1670 /* Used to build a map of a section. This is required for mixed-endian
1673 typedef struct elf_elf_section_map
1678 elf_aarch64_section_map;
1681 typedef struct _aarch64_elf_section_data
1683 struct bfd_elf_section_data elf;
1684 unsigned int mapcount;
1685 unsigned int mapsize;
1686 elf_aarch64_section_map *map;
1688 _aarch64_elf_section_data;
1690 #define elf_aarch64_section_data(sec) \
1691 ((_aarch64_elf_section_data *) elf_section_data (sec))
1693 /* A fix-descriptor for erratum 835769. */
1694 struct aarch64_erratum_835769_fix
1699 uint32_t veneered_insn;
1701 enum elf_aarch64_stub_type stub_type;
1704 /* The size of the thread control block which is defined to be two pointers. */
1705 #define TCB_SIZE (ARCH_SIZE/8)*2
1707 struct elf_aarch64_local_symbol
1709 unsigned int got_type;
1710 bfd_signed_vma got_refcount;
1713 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
1714 offset is from the end of the jump table and reserved entries
1717 The magic value (bfd_vma) -1 indicates that an offset has not be
1719 bfd_vma tlsdesc_got_jump_table_offset;
1722 struct elf_aarch64_obj_tdata
1724 struct elf_obj_tdata root;
1726 /* local symbol descriptors */
1727 struct elf_aarch64_local_symbol *locals;
1729 /* Zero to warn when linking objects with incompatible enum sizes. */
1730 int no_enum_size_warning;
1732 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
1733 int no_wchar_size_warning;
1736 #define elf_aarch64_tdata(bfd) \
1737 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
1739 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
1741 #define is_aarch64_elf(bfd) \
1742 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1743 && elf_tdata (bfd) != NULL \
1744 && elf_object_id (bfd) == AARCH64_ELF_DATA)
1747 elfNN_aarch64_mkobject (bfd *abfd)
1749 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
1753 #define elf_aarch64_hash_entry(ent) \
1754 ((struct elf_aarch64_link_hash_entry *)(ent))
1756 #define GOT_UNKNOWN 0
1757 #define GOT_NORMAL 1
1758 #define GOT_TLS_GD 2
1759 #define GOT_TLS_IE 4
1760 #define GOT_TLSDESC_GD 8
1762 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
1764 /* AArch64 ELF linker hash entry. */
1765 struct elf_aarch64_link_hash_entry
1767 struct elf_link_hash_entry root;
1769 /* Track dynamic relocs copied for this symbol. */
1770 struct elf_dyn_relocs *dyn_relocs;
1772 /* Since PLT entries have variable size, we need to record the
1773 index into .got.plt instead of recomputing it from the PLT
1775 bfd_signed_vma plt_got_offset;
1777 /* Bit mask representing the type of GOT entry(s) if any required by
1779 unsigned int got_type;
1781 /* A pointer to the most recently used stub hash entry against this
1783 struct elf_aarch64_stub_hash_entry *stub_cache;
1785 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
1786 is from the end of the jump table and reserved entries within the PLTGOT.
1788 The magic value (bfd_vma) -1 indicates that an offset has not
1790 bfd_vma tlsdesc_got_jump_table_offset;
1794 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
1796 unsigned long r_symndx)
1799 return elf_aarch64_hash_entry (h)->got_type;
1801 if (! elf_aarch64_locals (abfd))
1804 return elf_aarch64_locals (abfd)[r_symndx].got_type;
1807 /* Get the AArch64 elf linker hash table from a link_info structure. */
1808 #define elf_aarch64_hash_table(info) \
1809 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
1811 #define aarch64_stub_hash_lookup(table, string, create, copy) \
1812 ((struct elf_aarch64_stub_hash_entry *) \
1813 bfd_hash_lookup ((table), (string), (create), (copy)))
1815 /* AArch64 ELF linker hash table. */
1816 struct elf_aarch64_link_hash_table
1818 /* The main hash table. */
1819 struct elf_link_hash_table root;
1821 /* Nonzero to force PIC branch veneers. */
1824 /* Fix erratum 835769. */
1825 int fix_erratum_835769;
1827 /* A table of fix locations for erratum 835769. This holds erratum
1828 fix locations between elfNN_aarch64_size_stubs() and
1829 elfNN_aarch64_write_section(). */
1830 struct aarch64_erratum_835769_fix *aarch64_erratum_835769_fixes;
1831 unsigned int num_aarch64_erratum_835769_fixes;
1833 /* The number of bytes in the initial entry in the PLT. */
1834 bfd_size_type plt_header_size;
1836 /* The number of bytes in the subsequent PLT etries. */
1837 bfd_size_type plt_entry_size;
1839 /* Short-cuts to get to dynamic linker sections. */
1843 /* Small local sym cache. */
1844 struct sym_cache sym_cache;
1846 /* For convenience in allocate_dynrelocs. */
1849 /* The amount of space used by the reserved portion of the sgotplt
1850 section, plus whatever space is used by the jump slots. */
1851 bfd_vma sgotplt_jump_table_size;
1853 /* The stub hash table. */
1854 struct bfd_hash_table stub_hash_table;
1856 /* Linker stub bfd. */
1859 /* Linker call-backs. */
1860 asection *(*add_stub_section) (const char *, asection *);
1861 void (*layout_sections_again) (void);
1863 /* Array to keep track of which stub sections have been created, and
1864 information on stub grouping. */
1867 /* This is the section to which stubs in the group will be
1870 /* The stub section. */
1874 /* Assorted information used by elfNN_aarch64_size_stubs. */
1875 unsigned int bfd_count;
1877 asection **input_list;
1879 /* The offset into splt of the PLT entry for the TLS descriptor
1880 resolver. Special values are 0, if not necessary (or not found
1881 to be necessary yet), and -1 if needed but not determined
1883 bfd_vma tlsdesc_plt;
1885 /* The GOT offset for the lazy trampoline. Communicated to the
1886 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
1887 indicates an offset is not allocated. */
1888 bfd_vma dt_tlsdesc_got;
1890 /* Used by local STT_GNU_IFUNC symbols. */
1891 htab_t loc_hash_table;
1892 void * loc_hash_memory;
1895 /* Create an entry in an AArch64 ELF linker hash table. */
1897 static struct bfd_hash_entry *
1898 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
1899 struct bfd_hash_table *table,
1902 struct elf_aarch64_link_hash_entry *ret =
1903 (struct elf_aarch64_link_hash_entry *) entry;
1905 /* Allocate the structure if it has not already been allocated by a
1908 ret = bfd_hash_allocate (table,
1909 sizeof (struct elf_aarch64_link_hash_entry));
1911 return (struct bfd_hash_entry *) ret;
1913 /* Call the allocation method of the superclass. */
1914 ret = ((struct elf_aarch64_link_hash_entry *)
1915 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1919 ret->dyn_relocs = NULL;
1920 ret->got_type = GOT_UNKNOWN;
1921 ret->plt_got_offset = (bfd_vma) - 1;
1922 ret->stub_cache = NULL;
1923 ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
1926 return (struct bfd_hash_entry *) ret;
1929 /* Initialize an entry in the stub hash table. */
1931 static struct bfd_hash_entry *
1932 stub_hash_newfunc (struct bfd_hash_entry *entry,
1933 struct bfd_hash_table *table, const char *string)
1935 /* Allocate the structure if it has not already been allocated by a
1939 entry = bfd_hash_allocate (table,
1941 elf_aarch64_stub_hash_entry));
1946 /* Call the allocation method of the superclass. */
1947 entry = bfd_hash_newfunc (entry, table, string);
1950 struct elf_aarch64_stub_hash_entry *eh;
1952 /* Initialize the local fields. */
1953 eh = (struct elf_aarch64_stub_hash_entry *) entry;
1954 eh->stub_sec = NULL;
1955 eh->stub_offset = 0;
1956 eh->target_value = 0;
1957 eh->target_section = NULL;
1958 eh->stub_type = aarch64_stub_none;
1966 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1967 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1968 as global symbol. We reuse indx and dynstr_index for local symbol
1969 hash since they aren't used by global symbols in this backend. */
1972 elfNN_aarch64_local_htab_hash (const void *ptr)
1974 struct elf_link_hash_entry *h
1975 = (struct elf_link_hash_entry *) ptr;
1976 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1979 /* Compare local hash entries. */
1982 elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
1984 struct elf_link_hash_entry *h1
1985 = (struct elf_link_hash_entry *) ptr1;
1986 struct elf_link_hash_entry *h2
1987 = (struct elf_link_hash_entry *) ptr2;
1989 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
1992 /* Find and/or create a hash entry for local symbol. */
1994 static struct elf_link_hash_entry *
1995 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab,
1996 bfd *abfd, const Elf_Internal_Rela *rel,
1999 struct elf_aarch64_link_hash_entry e, *ret;
2000 asection *sec = abfd->sections;
2001 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
2002 ELFNN_R_SYM (rel->r_info));
2005 e.root.indx = sec->id;
2006 e.root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2007 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
2008 create ? INSERT : NO_INSERT);
2015 ret = (struct elf_aarch64_link_hash_entry *) *slot;
2019 ret = (struct elf_aarch64_link_hash_entry *)
2020 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
2021 sizeof (struct elf_aarch64_link_hash_entry));
2024 memset (ret, 0, sizeof (*ret));
2025 ret->root.indx = sec->id;
2026 ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2027 ret->root.dynindx = -1;
2033 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2036 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
2037 struct elf_link_hash_entry *dir,
2038 struct elf_link_hash_entry *ind)
2040 struct elf_aarch64_link_hash_entry *edir, *eind;
2042 edir = (struct elf_aarch64_link_hash_entry *) dir;
2043 eind = (struct elf_aarch64_link_hash_entry *) ind;
2045 if (eind->dyn_relocs != NULL)
2047 if (edir->dyn_relocs != NULL)
2049 struct elf_dyn_relocs **pp;
2050 struct elf_dyn_relocs *p;
2052 /* Add reloc counts against the indirect sym to the direct sym
2053 list. Merge any entries against the same section. */
2054 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2056 struct elf_dyn_relocs *q;
2058 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2059 if (q->sec == p->sec)
2061 q->pc_count += p->pc_count;
2062 q->count += p->count;
2069 *pp = edir->dyn_relocs;
2072 edir->dyn_relocs = eind->dyn_relocs;
2073 eind->dyn_relocs = NULL;
2076 if (ind->root.type == bfd_link_hash_indirect)
2078 /* Copy over PLT info. */
2079 if (dir->got.refcount <= 0)
2081 edir->got_type = eind->got_type;
2082 eind->got_type = GOT_UNKNOWN;
2086 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2089 /* Destroy an AArch64 elf linker hash table. */
2092 elfNN_aarch64_link_hash_table_free (bfd *obfd)
2094 struct elf_aarch64_link_hash_table *ret
2095 = (struct elf_aarch64_link_hash_table *) obfd->link.hash;
2097 if (ret->loc_hash_table)
2098 htab_delete (ret->loc_hash_table);
2099 if (ret->loc_hash_memory)
2100 objalloc_free ((struct objalloc *) ret->loc_hash_memory);
2102 bfd_hash_table_free (&ret->stub_hash_table);
2103 _bfd_elf_link_hash_table_free (obfd);
2106 /* Create an AArch64 elf linker hash table. */
2108 static struct bfd_link_hash_table *
2109 elfNN_aarch64_link_hash_table_create (bfd *abfd)
2111 struct elf_aarch64_link_hash_table *ret;
2112 bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
2114 ret = bfd_zmalloc (amt);
2118 if (!_bfd_elf_link_hash_table_init
2119 (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
2120 sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
2126 ret->plt_header_size = PLT_ENTRY_SIZE;
2127 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
2129 ret->dt_tlsdesc_got = (bfd_vma) - 1;
2131 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2132 sizeof (struct elf_aarch64_stub_hash_entry)))
2134 _bfd_elf_link_hash_table_free (abfd);
2138 ret->loc_hash_table = htab_try_create (1024,
2139 elfNN_aarch64_local_htab_hash,
2140 elfNN_aarch64_local_htab_eq,
2142 ret->loc_hash_memory = objalloc_create ();
2143 if (!ret->loc_hash_table || !ret->loc_hash_memory)
2145 elfNN_aarch64_link_hash_table_free (abfd);
2148 ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free;
2150 return &ret->root.root;
2154 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2155 bfd_vma offset, bfd_vma value)
2157 reloc_howto_type *howto;
2160 howto = elfNN_aarch64_howto_from_type (r_type);
2161 place = (input_section->output_section->vma + input_section->output_offset
2164 r_type = elfNN_aarch64_bfd_reloc_from_type (r_type);
2165 value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE);
2166 return _bfd_aarch64_elf_put_addend (input_bfd,
2167 input_section->contents + offset, r_type,
2171 static enum elf_aarch64_stub_type
2172 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2174 if (aarch64_valid_for_adrp_p (value, place))
2175 return aarch64_stub_adrp_branch;
2176 return aarch64_stub_long_branch;
2179 /* Determine the type of stub needed, if any, for a call. */
2181 static enum elf_aarch64_stub_type
2182 aarch64_type_of_stub (struct bfd_link_info *info,
2183 asection *input_sec,
2184 const Elf_Internal_Rela *rel,
2185 unsigned char st_type,
2186 struct elf_aarch64_link_hash_entry *hash,
2187 bfd_vma destination)
2190 bfd_signed_vma branch_offset;
2191 unsigned int r_type;
2192 struct elf_aarch64_link_hash_table *globals;
2193 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2194 bfd_boolean via_plt_p;
2196 if (st_type != STT_FUNC)
2199 globals = elf_aarch64_hash_table (info);
2200 via_plt_p = (globals->root.splt != NULL && hash != NULL
2201 && hash->root.plt.offset != (bfd_vma) - 1);
2206 /* Determine where the call point is. */
2207 location = (input_sec->output_offset
2208 + input_sec->output_section->vma + rel->r_offset);
2210 branch_offset = (bfd_signed_vma) (destination - location);
2212 r_type = ELFNN_R_TYPE (rel->r_info);
2214 /* We don't want to redirect any old unconditional jump in this way,
2215 only one which is being used for a sibcall, where it is
2216 acceptable for the IP0 and IP1 registers to be clobbered. */
2217 if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
2218 && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
2219 || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
2221 stub_type = aarch64_stub_long_branch;
2227 /* Build a name for an entry in the stub hash table. */
2230 elfNN_aarch64_stub_name (const asection *input_section,
2231 const asection *sym_sec,
2232 const struct elf_aarch64_link_hash_entry *hash,
2233 const Elf_Internal_Rela *rel)
2240 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
2241 stub_name = bfd_malloc (len);
2242 if (stub_name != NULL)
2243 snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
2244 (unsigned int) input_section->id,
2245 hash->root.root.root.string,
2250 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2251 stub_name = bfd_malloc (len);
2252 if (stub_name != NULL)
2253 snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
2254 (unsigned int) input_section->id,
2255 (unsigned int) sym_sec->id,
2256 (unsigned int) ELFNN_R_SYM (rel->r_info),
2263 /* Look up an entry in the stub hash. Stub entries are cached because
2264 creating the stub name takes a bit of time. */
2266 static struct elf_aarch64_stub_hash_entry *
2267 elfNN_aarch64_get_stub_entry (const asection *input_section,
2268 const asection *sym_sec,
2269 struct elf_link_hash_entry *hash,
2270 const Elf_Internal_Rela *rel,
2271 struct elf_aarch64_link_hash_table *htab)
2273 struct elf_aarch64_stub_hash_entry *stub_entry;
2274 struct elf_aarch64_link_hash_entry *h =
2275 (struct elf_aarch64_link_hash_entry *) hash;
2276 const asection *id_sec;
2278 if ((input_section->flags & SEC_CODE) == 0)
2281 /* If this input section is part of a group of sections sharing one
2282 stub section, then use the id of the first section in the group.
2283 Stub names need to include a section id, as there may well be
2284 more than one stub used to reach say, printf, and we need to
2285 distinguish between them. */
2286 id_sec = htab->stub_group[input_section->id].link_sec;
2288 if (h != NULL && h->stub_cache != NULL
2289 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
2291 stub_entry = h->stub_cache;
2297 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
2298 if (stub_name == NULL)
2301 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
2302 stub_name, FALSE, FALSE);
2304 h->stub_cache = stub_entry;
2312 /* Add a new stub entry to the stub hash. Not all fields of the new
2313 stub entry are initialised. */
2315 static struct elf_aarch64_stub_hash_entry *
2316 elfNN_aarch64_add_stub (const char *stub_name,
2318 struct elf_aarch64_link_hash_table *htab)
2322 struct elf_aarch64_stub_hash_entry *stub_entry;
2324 link_sec = htab->stub_group[section->id].link_sec;
2325 stub_sec = htab->stub_group[section->id].stub_sec;
2326 if (stub_sec == NULL)
2328 stub_sec = htab->stub_group[link_sec->id].stub_sec;
2329 if (stub_sec == NULL)
2335 namelen = strlen (link_sec->name);
2336 len = namelen + sizeof (STUB_SUFFIX);
2337 s_name = bfd_alloc (htab->stub_bfd, len);
2341 memcpy (s_name, link_sec->name, namelen);
2342 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2343 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
2344 if (stub_sec == NULL)
2346 htab->stub_group[link_sec->id].stub_sec = stub_sec;
2348 htab->stub_group[section->id].stub_sec = stub_sec;
2351 /* Enter this entry into the linker stub hash table. */
2352 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2354 if (stub_entry == NULL)
2356 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2357 section->owner, stub_name);
2361 stub_entry->stub_sec = stub_sec;
2362 stub_entry->stub_offset = 0;
2363 stub_entry->id_sec = link_sec;
2369 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
2370 void *in_arg ATTRIBUTE_UNUSED)
2372 struct elf_aarch64_stub_hash_entry *stub_entry;
2377 bfd_vma veneered_insn_loc;
2378 bfd_vma veneer_entry_loc;
2379 bfd_signed_vma branch_offset = 0;
2380 unsigned int template_size;
2381 const uint32_t *template;
2384 /* Massage our args to the form they really have. */
2385 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2387 stub_sec = stub_entry->stub_sec;
2389 /* Make a note of the offset within the stubs for this entry. */
2390 stub_entry->stub_offset = stub_sec->size;
2391 loc = stub_sec->contents + stub_entry->stub_offset;
2393 stub_bfd = stub_sec->owner;
2395 /* This is the address of the stub destination. */
2396 sym_value = (stub_entry->target_value
2397 + stub_entry->target_section->output_offset
2398 + stub_entry->target_section->output_section->vma);
2400 if (stub_entry->stub_type == aarch64_stub_long_branch)
2402 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
2403 + stub_sec->output_offset);
2405 /* See if we can relax the stub. */
2406 if (aarch64_valid_for_adrp_p (sym_value, place))
2407 stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
2410 switch (stub_entry->stub_type)
2412 case aarch64_stub_adrp_branch:
2413 template = aarch64_adrp_branch_stub;
2414 template_size = sizeof (aarch64_adrp_branch_stub);
2416 case aarch64_stub_long_branch:
2417 template = aarch64_long_branch_stub;
2418 template_size = sizeof (aarch64_long_branch_stub);
2420 case aarch64_stub_erratum_835769_veneer:
2421 template = aarch64_erratum_835769_stub;
2422 template_size = sizeof (aarch64_erratum_835769_stub);
2429 for (i = 0; i < (template_size / sizeof template[0]); i++)
2431 bfd_putl32 (template[i], loc);
2435 template_size = (template_size + 7) & ~7;
2436 stub_sec->size += template_size;
2438 switch (stub_entry->stub_type)
2440 case aarch64_stub_adrp_branch:
2441 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
2442 stub_entry->stub_offset, sym_value))
2443 /* The stub would not have been relaxed if the offset was out
2447 _bfd_final_link_relocate
2448 (elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC)),
2452 stub_entry->stub_offset + 4,
2457 case aarch64_stub_long_branch:
2458 /* We want the value relative to the address 12 bytes back from the
2460 _bfd_final_link_relocate (elfNN_aarch64_howto_from_type
2461 (AARCH64_R (PRELNN)), stub_bfd, stub_sec,
2463 stub_entry->stub_offset + 16,
2467 case aarch64_stub_erratum_835769_veneer:
2468 veneered_insn_loc = stub_entry->target_section->output_section->vma
2469 + stub_entry->target_section->output_offset
2470 + stub_entry->target_value;
2471 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
2472 + stub_entry->stub_sec->output_offset
2473 + stub_entry->stub_offset;
2474 branch_offset = veneered_insn_loc - veneer_entry_loc;
2475 branch_offset >>= 2;
2476 branch_offset &= 0x3ffffff;
2477 bfd_putl32 (stub_entry->veneered_insn,
2478 stub_sec->contents + stub_entry->stub_offset);
2479 bfd_putl32 (template[1] | branch_offset,
2480 stub_sec->contents + stub_entry->stub_offset + 4);
2490 /* As above, but don't actually build the stub. Just bump offset so
2491 we know stub section sizes. */
2494 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
2495 void *in_arg ATTRIBUTE_UNUSED)
2497 struct elf_aarch64_stub_hash_entry *stub_entry;
2500 /* Massage our args to the form they really have. */
2501 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2503 switch (stub_entry->stub_type)
2505 case aarch64_stub_adrp_branch:
2506 size = sizeof (aarch64_adrp_branch_stub);
2508 case aarch64_stub_long_branch:
2509 size = sizeof (aarch64_long_branch_stub);
2511 case aarch64_stub_erratum_835769_veneer:
2512 size = sizeof (aarch64_erratum_835769_stub);
2520 size = (size + 7) & ~7;
2521 stub_entry->stub_sec->size += size;
2525 /* External entry points for sizing and building linker stubs. */
2527 /* Set up various things so that we can make a list of input sections
2528 for each output section included in the link. Returns -1 on error,
2529 0 when no stubs will be needed, and 1 on success. */
2532 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
2533 struct bfd_link_info *info)
2536 unsigned int bfd_count;
2537 int top_id, top_index;
2539 asection **input_list, **list;
2541 struct elf_aarch64_link_hash_table *htab =
2542 elf_aarch64_hash_table (info);
2544 if (!is_elf_hash_table (htab))
2547 /* Count the number of input BFDs and find the top input section id. */
2548 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2549 input_bfd != NULL; input_bfd = input_bfd->link.next)
2552 for (section = input_bfd->sections;
2553 section != NULL; section = section->next)
2555 if (top_id < section->id)
2556 top_id = section->id;
2559 htab->bfd_count = bfd_count;
2561 amt = sizeof (struct map_stub) * (top_id + 1);
2562 htab->stub_group = bfd_zmalloc (amt);
2563 if (htab->stub_group == NULL)
2566 /* We can't use output_bfd->section_count here to find the top output
2567 section index as some sections may have been removed, and
2568 _bfd_strip_section_from_output doesn't renumber the indices. */
2569 for (section = output_bfd->sections, top_index = 0;
2570 section != NULL; section = section->next)
2572 if (top_index < section->index)
2573 top_index = section->index;
2576 htab->top_index = top_index;
2577 amt = sizeof (asection *) * (top_index + 1);
2578 input_list = bfd_malloc (amt);
2579 htab->input_list = input_list;
2580 if (input_list == NULL)
2583 /* For sections we aren't interested in, mark their entries with a
2584 value we can check later. */
2585 list = input_list + top_index;
2587 *list = bfd_abs_section_ptr;
2588 while (list-- != input_list);
2590 for (section = output_bfd->sections;
2591 section != NULL; section = section->next)
2593 if ((section->flags & SEC_CODE) != 0)
2594 input_list[section->index] = NULL;
2600 /* Used by elfNN_aarch64_next_input_section and group_sections. */
2601 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2603 /* The linker repeatedly calls this function for each input section,
2604 in the order that input sections are linked into output sections.
2605 Build lists of input sections to determine groupings between which
2606 we may insert linker stubs. */
2609 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
2611 struct elf_aarch64_link_hash_table *htab =
2612 elf_aarch64_hash_table (info);
2614 if (isec->output_section->index <= htab->top_index)
2616 asection **list = htab->input_list + isec->output_section->index;
2618 if (*list != bfd_abs_section_ptr)
2620 /* Steal the link_sec pointer for our list. */
2621 /* This happens to make the list in reverse order,
2622 which is what we want. */
2623 PREV_SEC (isec) = *list;
2629 /* See whether we can group stub sections together. Grouping stub
2630 sections may result in fewer stubs. More importantly, we need to
2631 put all .init* and .fini* stubs at the beginning of the .init or
2632 .fini output sections respectively, because glibc splits the
2633 _init and _fini functions into multiple parts. Putting a stub in
2634 the middle of a function is not a good idea. */
2637 group_sections (struct elf_aarch64_link_hash_table *htab,
2638 bfd_size_type stub_group_size,
2639 bfd_boolean stubs_always_before_branch)
2641 asection **list = htab->input_list + htab->top_index;
2645 asection *tail = *list;
2647 if (tail == bfd_abs_section_ptr)
2650 while (tail != NULL)
2654 bfd_size_type total;
2658 while ((prev = PREV_SEC (curr)) != NULL
2659 && ((total += curr->output_offset - prev->output_offset)
2663 /* OK, the size from the start of CURR to the end is less
2664 than stub_group_size and thus can be handled by one stub
2665 section. (Or the tail section is itself larger than
2666 stub_group_size, in which case we may be toast.)
2667 We should really be keeping track of the total size of
2668 stubs added here, as stubs contribute to the final output
2672 prev = PREV_SEC (tail);
2673 /* Set up this stub group. */
2674 htab->stub_group[tail->id].link_sec = curr;
2676 while (tail != curr && (tail = prev) != NULL);
2678 /* But wait, there's more! Input sections up to stub_group_size
2679 bytes before the stub section can be handled by it too. */
2680 if (!stubs_always_before_branch)
2684 && ((total += tail->output_offset - prev->output_offset)
2688 prev = PREV_SEC (tail);
2689 htab->stub_group[tail->id].link_sec = curr;
2695 while (list-- != htab->input_list);
2697 free (htab->input_list);
2702 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
2704 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
2705 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
2706 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
2707 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
2708 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
2709 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
2711 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
2712 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
2713 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
2714 #define AARCH64_ZR 0x1f
2716 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
2717 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
2719 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
2720 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
2721 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
2722 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
2723 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
2724 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
2725 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
2726 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
2727 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
2728 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
2729 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
2730 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
2731 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
2732 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
2733 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
2734 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
2735 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
2736 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
2738 /* Classify an INSN if it is indeed a load/store. Return TRUE if INSN
2739 is a load/store along with the Rt and Rtn. Return FALSE if not a
2743 aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rtn,
2744 bfd_boolean *pair, bfd_boolean *load)
2752 /* Bail out quickly if INSN doesn't fall into the the load-store
2754 if (!AARCH64_LDST (insn))
2759 if (AARCH64_LDST_EX (insn))
2761 *rt = AARCH64_RT (insn);
2763 if (AARCH64_BIT (insn, 21) == 1)
2766 *rtn = AARCH64_RT2 (insn);
2768 *load = AARCH64_LD (insn);
2771 else if (AARCH64_LDST_NAP (insn)
2772 || AARCH64_LDSTP_PI (insn)
2773 || AARCH64_LDSTP_O (insn)
2774 || AARCH64_LDSTP_PRE (insn))
2777 *rt = AARCH64_RT (insn);
2778 *rtn = AARCH64_RT2 (insn);
2779 *load = AARCH64_LD (insn);
2782 else if (AARCH64_LDST_PCREL (insn)
2783 || AARCH64_LDST_UI (insn)
2784 || AARCH64_LDST_PIIMM (insn)
2785 || AARCH64_LDST_U (insn)
2786 || AARCH64_LDST_PREIMM (insn)
2787 || AARCH64_LDST_RO (insn)
2788 || AARCH64_LDST_UIMM (insn))
2790 *rt = AARCH64_RT (insn);
2792 if (AARCH64_LDST_PCREL (insn))
2794 opc = AARCH64_BITS (insn, 22, 2);
2795 v = AARCH64_BIT (insn, 26);
2796 opc_v = opc | (v << 2);
2797 *load = (opc_v == 1 || opc_v == 2 || opc_v == 3
2798 || opc_v == 5 || opc_v == 7);
2801 else if (AARCH64_LDST_SIMD_M (insn)
2802 || AARCH64_LDST_SIMD_M_PI (insn))
2804 *rt = AARCH64_RT (insn);
2805 *load = AARCH64_BIT (insn, 22);
2806 opcode = (insn >> 12) & 0xf;
2833 else if (AARCH64_LDST_SIMD_S (insn)
2834 || AARCH64_LDST_SIMD_S_PI (insn))
2836 *rt = AARCH64_RT (insn);
2837 r = (insn >> 21) & 1;
2838 *load = AARCH64_BIT (insn, 22);
2839 opcode = (insn >> 13) & 0x7;
2851 *rtn = *rt + (r == 0 ? 2 : 3);
2859 *rtn = *rt + (r == 0 ? 2 : 3);
2871 /* Return TRUE if INSN is multiply-accumulate. */
2874 aarch64_mlxl_p (uint32_t insn)
2876 uint32_t op31 = AARCH64_OP31 (insn);
2878 if (AARCH64_MAC (insn)
2879 && (op31 == 0 || op31 == 1 || op31 == 5)
2880 /* Exclude MUL instructions which are encoded as a multiple accumulate
2882 && AARCH64_RA (insn) != AARCH64_ZR)
2888 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
2889 it is possible for a 64-bit multiply-accumulate instruction to generate an
2890 incorrect result. The details are quite complex and hard to
2891 determine statically, since branches in the code may exist in some
2892 circumstances, but all cases end with a memory (load, store, or
2893 prefetch) instruction followed immediately by the multiply-accumulate
2894 operation. We employ a linker patching technique, by moving the potentially
2895 affected multiply-accumulate instruction into a patch region and replacing
2896 the original instruction with a branch to the patch. This function checks
2897 if INSN_1 is the memory operation followed by a multiply-accumulate
2898 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
2899 if INSN_1 and INSN_2 are safe. */
2902 aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2)
2912 if (aarch64_mlxl_p (insn_2)
2913 && aarch64_mem_op_p (insn_1, &rt, &rtn, &pair, &load))
2915 /* Any SIMD memory op is independent of the subsequent MLA
2916 by definition of the erratum. */
2917 if (AARCH64_BIT (insn_1, 26))
2920 /* If not SIMD, check for integer memory ops and MLA relationship. */
2921 rn = AARCH64_RN (insn_2);
2922 ra = AARCH64_RA (insn_2);
2923 rm = AARCH64_RM (insn_2);
2925 /* If this is a load and there's a true(RAW) dependency, we are safe
2926 and this is not an erratum sequence. */
2928 (rt == rn || rt == rm || rt == ra
2929 || (pair && (rtn == rn || rtn == rm || rtn == ra))))
2932 /* We conservatively put out stubs for all other cases (including
2940 /* Used to order a list of mapping symbols by address. */
2943 elf_aarch64_compare_mapping (const void *a, const void *b)
2945 const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a;
2946 const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b;
2948 if (amap->vma > bmap->vma)
2950 else if (amap->vma < bmap->vma)
2952 else if (amap->type > bmap->type)
2953 /* Ensure results do not depend on the host qsort for objects with
2954 multiple mapping symbols at the same address by sorting on type
2957 else if (amap->type < bmap->type)
2964 erratum_835769_scan (bfd *input_bfd,
2965 struct bfd_link_info *info,
2966 struct aarch64_erratum_835769_fix **fixes_p,
2967 unsigned int *num_fixes_p,
2968 unsigned int *fix_table_size_p)
2971 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
2972 struct aarch64_erratum_835769_fix *fixes = *fixes_p;
2973 unsigned int num_fixes = *num_fixes_p;
2974 unsigned int fix_table_size = *fix_table_size_p;
2979 for (section = input_bfd->sections;
2981 section = section->next)
2983 bfd_byte *contents = NULL;
2984 struct _aarch64_elf_section_data *sec_data;
2987 if (elf_section_type (section) != SHT_PROGBITS
2988 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
2989 || (section->flags & SEC_EXCLUDE) != 0
2990 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
2991 || (section->output_section == bfd_abs_section_ptr))
2994 if (elf_section_data (section)->this_hdr.contents != NULL)
2995 contents = elf_section_data (section)->this_hdr.contents;
2996 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
2999 sec_data = elf_aarch64_section_data (section);
3001 qsort (sec_data->map, sec_data->mapcount,
3002 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3004 for (span = 0; span < sec_data->mapcount; span++)
3006 unsigned int span_start = sec_data->map[span].vma;
3007 unsigned int span_end = ((span == sec_data->mapcount - 1)
3008 ? sec_data->map[0].vma + section->size
3009 : sec_data->map[span + 1].vma);
3011 char span_type = sec_data->map[span].type;
3013 if (span_type == 'd')
3016 for (i = span_start; i + 4 < span_end; i += 4)
3018 uint32_t insn_1 = bfd_getl32 (contents + i);
3019 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3021 if (aarch64_erratum_sequence (insn_1, insn_2))
3023 char *stub_name = NULL;
3024 stub_name = (char *) bfd_malloc
3025 (strlen ("__erratum_835769_veneer_") + 16);
3026 if (stub_name != NULL)
3028 (stub_name,"__erratum_835769_veneer_%d", num_fixes);
3032 if (num_fixes == fix_table_size)
3034 fix_table_size *= 2;
3036 (struct aarch64_erratum_835769_fix *)
3038 sizeof (struct aarch64_erratum_835769_fix)
3044 fixes[num_fixes].input_bfd = input_bfd;
3045 fixes[num_fixes].section = section;
3046 fixes[num_fixes].offset = i + 4;
3047 fixes[num_fixes].veneered_insn = insn_2;
3048 fixes[num_fixes].stub_name = stub_name;
3049 fixes[num_fixes].stub_type = aarch64_stub_erratum_835769_veneer;
3054 if (elf_section_data (section)->this_hdr.contents == NULL)
3059 *num_fixes_p = num_fixes;
3060 *fix_table_size_p = fix_table_size;
3064 /* Find or create a stub section. Returns a pointer to the stub section, and
3065 the section to which the stub section will be attached (in *LINK_SEC_P).
3066 LINK_SEC_P may be NULL. */
3069 elf_aarch64_create_or_find_stub_sec (asection **link_sec_p, asection *section,
3070 struct elf_aarch64_link_hash_table *htab)
3075 link_sec = htab->stub_group[section->id].link_sec;
3076 BFD_ASSERT (link_sec != NULL);
3077 stub_sec = htab->stub_group[section->id].stub_sec;
3079 if (stub_sec == NULL)
3081 stub_sec = htab->stub_group[link_sec->id].stub_sec;
3082 if (stub_sec == NULL)
3088 namelen = strlen (link_sec->name);
3089 len = namelen + sizeof (STUB_SUFFIX);
3090 s_name = (char *) bfd_alloc (htab->stub_bfd, len);
3094 memcpy (s_name, link_sec->name, namelen);
3095 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
3096 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
3098 if (stub_sec == NULL)
3100 htab->stub_group[link_sec->id].stub_sec = stub_sec;
3102 htab->stub_group[section->id].stub_sec = stub_sec;
3106 *link_sec_p = link_sec;
3111 /* Determine and set the size of the stub section for a final link.
3113 The basic idea here is to examine all the relocations looking for
3114 PC-relative calls to a target that is unreachable with a "bl"
3118 elfNN_aarch64_size_stubs (bfd *output_bfd,
3120 struct bfd_link_info *info,
3121 bfd_signed_vma group_size,
3122 asection * (*add_stub_section) (const char *,
3124 void (*layout_sections_again) (void))
3126 bfd_size_type stub_group_size;
3127 bfd_boolean stubs_always_before_branch;
3128 bfd_boolean stub_changed = 0;
3129 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3130 struct aarch64_erratum_835769_fix *erratum_835769_fixes = NULL;
3131 unsigned int num_erratum_835769_fixes = 0;
3132 unsigned int erratum_835769_fix_table_size = 10;
3135 if (htab->fix_erratum_835769)
3137 erratum_835769_fixes
3138 = (struct aarch64_erratum_835769_fix *)
3140 (sizeof (struct aarch64_erratum_835769_fix) *
3141 erratum_835769_fix_table_size);
3142 if (erratum_835769_fixes == NULL)
3143 goto error_ret_free_local;
3146 /* Propagate mach to stub bfd, because it may not have been
3147 finalized when we created stub_bfd. */
3148 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3149 bfd_get_mach (output_bfd));
3151 /* Stash our params away. */
3152 htab->stub_bfd = stub_bfd;
3153 htab->add_stub_section = add_stub_section;
3154 htab->layout_sections_again = layout_sections_again;
3155 stubs_always_before_branch = group_size < 0;
3157 stub_group_size = -group_size;
3159 stub_group_size = group_size;
3161 if (stub_group_size == 1)
3163 /* Default values. */
3164 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
3165 stub_group_size = 127 * 1024 * 1024;
3168 group_sections (htab, stub_group_size, stubs_always_before_branch);
3173 unsigned int bfd_indx;
3175 unsigned prev_num_erratum_835769_fixes = num_erratum_835769_fixes;
3177 num_erratum_835769_fixes = 0;
3178 for (input_bfd = info->input_bfds, bfd_indx = 0;
3179 input_bfd != NULL; input_bfd = input_bfd->link.next, bfd_indx++)
3181 Elf_Internal_Shdr *symtab_hdr;
3183 Elf_Internal_Sym *local_syms = NULL;
3185 /* We'll need the symbol table in a second. */
3186 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3187 if (symtab_hdr->sh_info == 0)
3190 /* Walk over each section attached to the input bfd. */
3191 for (section = input_bfd->sections;
3192 section != NULL; section = section->next)
3194 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3196 /* If there aren't any relocs, then there's nothing more
3198 if ((section->flags & SEC_RELOC) == 0
3199 || section->reloc_count == 0
3200 || (section->flags & SEC_CODE) == 0)
3203 /* If this section is a link-once section that will be
3204 discarded, then don't create any stubs. */
3205 if (section->output_section == NULL
3206 || section->output_section->owner != output_bfd)
3209 /* Get the relocs. */
3211 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3212 NULL, info->keep_memory);
3213 if (internal_relocs == NULL)
3214 goto error_ret_free_local;
3216 /* Now examine each relocation. */
3217 irela = internal_relocs;
3218 irelaend = irela + section->reloc_count;
3219 for (; irela < irelaend; irela++)
3221 unsigned int r_type, r_indx;
3222 enum elf_aarch64_stub_type stub_type;
3223 struct elf_aarch64_stub_hash_entry *stub_entry;
3226 bfd_vma destination;
3227 struct elf_aarch64_link_hash_entry *hash;
3228 const char *sym_name;
3230 const asection *id_sec;
3231 unsigned char st_type;
3234 r_type = ELFNN_R_TYPE (irela->r_info);
3235 r_indx = ELFNN_R_SYM (irela->r_info);
3237 if (r_type >= (unsigned int) R_AARCH64_end)
3239 bfd_set_error (bfd_error_bad_value);
3240 error_ret_free_internal:
3241 if (elf_section_data (section)->relocs == NULL)
3242 free (internal_relocs);
3243 goto error_ret_free_local;
3246 /* Only look for stubs on unconditional branch and
3247 branch and link instructions. */
3248 if (r_type != (unsigned int) AARCH64_R (CALL26)
3249 && r_type != (unsigned int) AARCH64_R (JUMP26))
3252 /* Now determine the call target, its name, value,
3259 if (r_indx < symtab_hdr->sh_info)
3261 /* It's a local symbol. */
3262 Elf_Internal_Sym *sym;
3263 Elf_Internal_Shdr *hdr;
3265 if (local_syms == NULL)
3268 = (Elf_Internal_Sym *) symtab_hdr->contents;
3269 if (local_syms == NULL)
3271 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
3272 symtab_hdr->sh_info, 0,
3274 if (local_syms == NULL)
3275 goto error_ret_free_internal;
3278 sym = local_syms + r_indx;
3279 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
3280 sym_sec = hdr->bfd_section;
3282 /* This is an undefined symbol. It can never
3286 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
3287 sym_value = sym->st_value;
3288 destination = (sym_value + irela->r_addend
3289 + sym_sec->output_offset
3290 + sym_sec->output_section->vma);
3291 st_type = ELF_ST_TYPE (sym->st_info);
3293 = bfd_elf_string_from_elf_section (input_bfd,
3294 symtab_hdr->sh_link,
3301 e_indx = r_indx - symtab_hdr->sh_info;
3302 hash = ((struct elf_aarch64_link_hash_entry *)
3303 elf_sym_hashes (input_bfd)[e_indx]);
3305 while (hash->root.root.type == bfd_link_hash_indirect
3306 || hash->root.root.type == bfd_link_hash_warning)
3307 hash = ((struct elf_aarch64_link_hash_entry *)
3308 hash->root.root.u.i.link);
3310 if (hash->root.root.type == bfd_link_hash_defined
3311 || hash->root.root.type == bfd_link_hash_defweak)
3313 struct elf_aarch64_link_hash_table *globals =
3314 elf_aarch64_hash_table (info);
3315 sym_sec = hash->root.root.u.def.section;
3316 sym_value = hash->root.root.u.def.value;
3317 /* For a destination in a shared library,
3318 use the PLT stub as target address to
3319 decide whether a branch stub is
3321 if (globals->root.splt != NULL && hash != NULL
3322 && hash->root.plt.offset != (bfd_vma) - 1)
3324 sym_sec = globals->root.splt;
3325 sym_value = hash->root.plt.offset;
3326 if (sym_sec->output_section != NULL)
3327 destination = (sym_value
3328 + sym_sec->output_offset
3330 sym_sec->output_section->vma);
3332 else if (sym_sec->output_section != NULL)
3333 destination = (sym_value + irela->r_addend
3334 + sym_sec->output_offset
3335 + sym_sec->output_section->vma);
3337 else if (hash->root.root.type == bfd_link_hash_undefined
3338 || (hash->root.root.type
3339 == bfd_link_hash_undefweak))
3341 /* For a shared library, use the PLT stub as
3342 target address to decide whether a long
3343 branch stub is needed.
3344 For absolute code, they cannot be handled. */
3345 struct elf_aarch64_link_hash_table *globals =
3346 elf_aarch64_hash_table (info);
3348 if (globals->root.splt != NULL && hash != NULL
3349 && hash->root.plt.offset != (bfd_vma) - 1)
3351 sym_sec = globals->root.splt;
3352 sym_value = hash->root.plt.offset;
3353 if (sym_sec->output_section != NULL)
3354 destination = (sym_value
3355 + sym_sec->output_offset
3357 sym_sec->output_section->vma);
3364 bfd_set_error (bfd_error_bad_value);
3365 goto error_ret_free_internal;
3367 st_type = ELF_ST_TYPE (hash->root.type);
3368 sym_name = hash->root.root.root.string;
3371 /* Determine what (if any) linker stub is needed. */
3372 stub_type = aarch64_type_of_stub
3373 (info, section, irela, st_type, hash, destination);
3374 if (stub_type == aarch64_stub_none)
3377 /* Support for grouping stub sections. */
3378 id_sec = htab->stub_group[section->id].link_sec;
3380 /* Get the name of this stub. */
3381 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
3384 goto error_ret_free_internal;
3387 aarch64_stub_hash_lookup (&htab->stub_hash_table,
3388 stub_name, FALSE, FALSE);
3389 if (stub_entry != NULL)
3391 /* The proper stub has already been created. */
3396 stub_entry = elfNN_aarch64_add_stub (stub_name, section,
3398 if (stub_entry == NULL)
3401 goto error_ret_free_internal;
3404 stub_entry->target_value = sym_value;
3405 stub_entry->target_section = sym_sec;
3406 stub_entry->stub_type = stub_type;
3407 stub_entry->h = hash;
3408 stub_entry->st_type = st_type;
3410 if (sym_name == NULL)
3411 sym_name = "unnamed";
3412 len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
3413 stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
3414 if (stub_entry->output_name == NULL)
3417 goto error_ret_free_internal;
3420 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
3423 stub_changed = TRUE;
3426 /* We're done with the internal relocs, free them. */
3427 if (elf_section_data (section)->relocs == NULL)
3428 free (internal_relocs);
3431 if (htab->fix_erratum_835769)
3433 /* Scan for sequences which might trigger erratum 835769. */
3434 if (erratum_835769_scan (input_bfd, info, &erratum_835769_fixes,
3435 &num_erratum_835769_fixes,
3436 &erratum_835769_fix_table_size) != 0)
3437 goto error_ret_free_local;
3441 if (prev_num_erratum_835769_fixes != num_erratum_835769_fixes)
3442 stub_changed = TRUE;
3447 /* OK, we've added some stubs. Find out the new size of the
3449 for (stub_sec = htab->stub_bfd->sections;
3450 stub_sec != NULL; stub_sec = stub_sec->next)
3452 /* Ignore non-stub sections. */
3453 if (!strstr (stub_sec->name, STUB_SUFFIX))
3458 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
3460 /* Add erratum 835769 veneers to stub section sizes too. */
3461 if (htab->fix_erratum_835769)
3462 for (i = 0; i < num_erratum_835769_fixes; i++)
3464 stub_sec = elf_aarch64_create_or_find_stub_sec (NULL,
3465 erratum_835769_fixes[i].section, htab);
3467 if (stub_sec == NULL)
3468 goto error_ret_free_local;
3470 stub_sec->size += 8;
3473 /* Ask the linker to do its stuff. */
3474 (*htab->layout_sections_again) ();
3475 stub_changed = FALSE;
3478 /* Add stubs for erratum 835769 fixes now. */
3479 if (htab->fix_erratum_835769)
3481 for (i = 0; i < num_erratum_835769_fixes; i++)
3483 struct elf_aarch64_stub_hash_entry *stub_entry;
3484 char *stub_name = erratum_835769_fixes[i].stub_name;
3485 asection *section = erratum_835769_fixes[i].section;
3486 unsigned int section_id = erratum_835769_fixes[i].section->id;
3487 asection *link_sec = htab->stub_group[section_id].link_sec;
3488 asection *stub_sec = htab->stub_group[section_id].stub_sec;
3490 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
3491 stub_name, TRUE, FALSE);
3492 if (stub_entry == NULL)
3494 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
3500 stub_entry->stub_sec = stub_sec;
3501 stub_entry->stub_offset = 0;
3502 stub_entry->id_sec = link_sec;
3503 stub_entry->stub_type = erratum_835769_fixes[i].stub_type;
3504 stub_entry->target_section = section;
3505 stub_entry->target_value = erratum_835769_fixes[i].offset;
3506 stub_entry->veneered_insn = erratum_835769_fixes[i].veneered_insn;
3507 stub_entry->output_name = erratum_835769_fixes[i].stub_name;
3510 /* Stash the erratum 835769 fix array for use later in
3511 elfNN_aarch64_write_section(). */
3512 htab->aarch64_erratum_835769_fixes = erratum_835769_fixes;
3513 htab->num_aarch64_erratum_835769_fixes = num_erratum_835769_fixes;
3517 htab->aarch64_erratum_835769_fixes = NULL;
3518 htab->num_aarch64_erratum_835769_fixes = 0;
3523 error_ret_free_local:
3527 /* Build all the stubs associated with the current output file. The
3528 stubs are kept in a hash table attached to the main linker hash
3529 table. We also set up the .plt entries for statically linked PIC
3530 functions here. This function is called via aarch64_elf_finish in the
3534 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
3537 struct bfd_hash_table *table;
3538 struct elf_aarch64_link_hash_table *htab;
3540 htab = elf_aarch64_hash_table (info);
3542 for (stub_sec = htab->stub_bfd->sections;
3543 stub_sec != NULL; stub_sec = stub_sec->next)
3547 /* Ignore non-stub sections. */
3548 if (!strstr (stub_sec->name, STUB_SUFFIX))
3551 /* Allocate memory to hold the linker stubs. */
3552 size = stub_sec->size;
3553 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
3554 if (stub_sec->contents == NULL && size != 0)
3559 /* Build the stubs as directed by the stub hash table. */
3560 table = &htab->stub_hash_table;
3561 bfd_hash_traverse (table, aarch64_build_one_stub, info);
3567 /* Add an entry to the code/data map for section SEC. */
3570 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
3572 struct _aarch64_elf_section_data *sec_data =
3573 elf_aarch64_section_data (sec);
3574 unsigned int newidx;
3576 if (sec_data->map == NULL)
3578 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
3579 sec_data->mapcount = 0;
3580 sec_data->mapsize = 1;
3583 newidx = sec_data->mapcount++;
3585 if (sec_data->mapcount > sec_data->mapsize)
3587 sec_data->mapsize *= 2;
3588 sec_data->map = bfd_realloc_or_free
3589 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
3594 sec_data->map[newidx].vma = vma;
3595 sec_data->map[newidx].type = type;
3600 /* Initialise maps of insn/data for input BFDs. */
3602 bfd_elfNN_aarch64_init_maps (bfd *abfd)
3604 Elf_Internal_Sym *isymbuf;
3605 Elf_Internal_Shdr *hdr;
3606 unsigned int i, localsyms;
3608 /* Make sure that we are dealing with an AArch64 elf binary. */
3609 if (!is_aarch64_elf (abfd))
3612 if ((abfd->flags & DYNAMIC) != 0)
3615 hdr = &elf_symtab_hdr (abfd);
3616 localsyms = hdr->sh_info;
3618 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3619 should contain the number of local symbols, which should come before any
3620 global symbols. Mapping symbols are always local. */
3621 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
3623 /* No internal symbols read? Skip this BFD. */
3624 if (isymbuf == NULL)
3627 for (i = 0; i < localsyms; i++)
3629 Elf_Internal_Sym *isym = &isymbuf[i];
3630 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3633 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
3635 name = bfd_elf_string_from_elf_section (abfd,
3639 if (bfd_is_aarch64_special_symbol_name
3640 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
3641 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
3646 /* Set option values needed during linking. */
3648 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
3649 struct bfd_link_info *link_info,
3651 int no_wchar_warn, int pic_veneer,
3652 int fix_erratum_835769)
3654 struct elf_aarch64_link_hash_table *globals;
3656 globals = elf_aarch64_hash_table (link_info);
3657 globals->pic_veneer = pic_veneer;
3658 globals->fix_erratum_835769 = fix_erratum_835769;
3660 BFD_ASSERT (is_aarch64_elf (output_bfd));
3661 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
3662 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
3666 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
3667 struct elf_aarch64_link_hash_table
3668 *globals, struct bfd_link_info *info,
3669 bfd_vma value, bfd *output_bfd,
3670 bfd_boolean *unresolved_reloc_p)
3672 bfd_vma off = (bfd_vma) - 1;
3673 asection *basegot = globals->root.sgot;
3674 bfd_boolean dyn = globals->root.dynamic_sections_created;
3678 BFD_ASSERT (basegot != NULL);
3679 off = h->got.offset;
3680 BFD_ASSERT (off != (bfd_vma) - 1);
3681 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3683 && SYMBOL_REFERENCES_LOCAL (info, h))
3684 || (ELF_ST_VISIBILITY (h->other)
3685 && h->root.type == bfd_link_hash_undefweak))
3687 /* This is actually a static link, or it is a -Bsymbolic link
3688 and the symbol is defined locally. We must initialize this
3689 entry in the global offset table. Since the offset must
3690 always be a multiple of 8 (4 in the case of ILP32), we use
3691 the least significant bit to record whether we have
3692 initialized it already.
3693 When doing a dynamic link, we create a .rel(a).got relocation
3694 entry to initialize the value. This is done in the
3695 finish_dynamic_symbol routine. */
3700 bfd_put_NN (output_bfd, value, basegot->contents + off);
3705 *unresolved_reloc_p = FALSE;
3707 off = off + basegot->output_section->vma + basegot->output_offset;
3713 /* Change R_TYPE to a more efficient access model where possible,
3714 return the new reloc type. */
3716 static bfd_reloc_code_real_type
3717 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
3718 struct elf_link_hash_entry *h)
3720 bfd_boolean is_local = h == NULL;
3724 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3725 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3727 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
3728 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
3730 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3731 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
3733 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
3734 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
3736 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3737 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
3739 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
3740 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
3742 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3743 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3744 /* Instructions with these relocations will become NOPs. */
3745 return BFD_RELOC_AARCH64_NONE;
3755 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
3759 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
3760 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
3761 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
3762 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
3765 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3766 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3769 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3770 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3771 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3772 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
3773 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
3774 return GOT_TLSDESC_GD;
3776 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3777 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
3778 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
3781 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
3782 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
3783 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
3784 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
3785 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
3786 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
3787 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
3788 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
3798 aarch64_can_relax_tls (bfd *input_bfd,
3799 struct bfd_link_info *info,
3800 bfd_reloc_code_real_type r_type,
3801 struct elf_link_hash_entry *h,
3802 unsigned long r_symndx)
3804 unsigned int symbol_got_type;
3805 unsigned int reloc_got_type;
3807 if (! IS_AARCH64_TLS_RELOC (r_type))
3810 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
3811 reloc_got_type = aarch64_reloc_got_type (r_type);
3813 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
3819 if (h && h->root.type == bfd_link_hash_undefweak)
3825 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
3828 static bfd_reloc_code_real_type
3829 aarch64_tls_transition (bfd *input_bfd,
3830 struct bfd_link_info *info,
3831 unsigned int r_type,
3832 struct elf_link_hash_entry *h,
3833 unsigned long r_symndx)
3835 bfd_reloc_code_real_type bfd_r_type
3836 = elfNN_aarch64_bfd_reloc_from_type (r_type);
3838 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
3841 return aarch64_tls_transition_without_check (bfd_r_type, h);
3844 /* Return the base VMA address which should be subtracted from real addresses
3845 when resolving R_AARCH64_TLS_DTPREL relocation. */
3848 dtpoff_base (struct bfd_link_info *info)
3850 /* If tls_sec is NULL, we should have signalled an error already. */
3851 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
3852 return elf_hash_table (info)->tls_sec->vma;
3855 /* Return the base VMA address which should be subtracted from real addresses
3856 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
3859 tpoff_base (struct bfd_link_info *info)
3861 struct elf_link_hash_table *htab = elf_hash_table (info);
3863 /* If tls_sec is NULL, we should have signalled an error already. */
3864 BFD_ASSERT (htab->tls_sec != NULL);
3866 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
3867 htab->tls_sec->alignment_power);
3868 return htab->tls_sec->vma - base;
3872 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3873 unsigned long r_symndx)
3875 /* Calculate the address of the GOT entry for symbol
3876 referred to in h. */
3878 return &h->got.offset;
3882 struct elf_aarch64_local_symbol *l;
3884 l = elf_aarch64_locals (input_bfd);
3885 return &l[r_symndx].got_offset;
3890 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3891 unsigned long r_symndx)
3894 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
3899 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
3900 unsigned long r_symndx)
3903 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3908 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3909 unsigned long r_symndx)
3912 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3918 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3919 unsigned long r_symndx)
3921 /* Calculate the address of the GOT entry for symbol
3922 referred to in h. */
3925 struct elf_aarch64_link_hash_entry *eh;
3926 eh = (struct elf_aarch64_link_hash_entry *) h;
3927 return &eh->tlsdesc_got_jump_table_offset;
3932 struct elf_aarch64_local_symbol *l;
3934 l = elf_aarch64_locals (input_bfd);
3935 return &l[r_symndx].tlsdesc_got_jump_table_offset;
3940 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3941 unsigned long r_symndx)
3944 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3949 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
3950 struct elf_link_hash_entry *h,
3951 unsigned long r_symndx)
3954 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3959 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3960 unsigned long r_symndx)
3963 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3968 /* Data for make_branch_to_erratum_835769_stub(). */
3970 struct erratum_835769_branch_to_stub_data
3972 asection *output_section;
3976 /* Helper to insert branches to erratum 835769 stubs in the right
3977 places for a particular section. */
3980 make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry,
3983 struct elf_aarch64_stub_hash_entry *stub_entry;
3984 struct erratum_835769_branch_to_stub_data *data;
3986 unsigned long branch_insn = 0;
3987 bfd_vma veneered_insn_loc, veneer_entry_loc;
3988 bfd_signed_vma branch_offset;
3989 unsigned int target;
3992 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
3993 data = (struct erratum_835769_branch_to_stub_data *) in_arg;
3995 if (stub_entry->target_section != data->output_section
3996 || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer)
3999 contents = data->contents;
4000 veneered_insn_loc = stub_entry->target_section->output_section->vma
4001 + stub_entry->target_section->output_offset
4002 + stub_entry->target_value;
4003 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4004 + stub_entry->stub_sec->output_offset
4005 + stub_entry->stub_offset;
4006 branch_offset = veneer_entry_loc - veneered_insn_loc;
4008 abfd = stub_entry->target_section->owner;
4009 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4010 (*_bfd_error_handler)
4011 (_("%B: error: Erratum 835769 stub out "
4012 "of range (input file too large)"), abfd);
4014 target = stub_entry->target_value;
4015 branch_insn = 0x14000000;
4016 branch_offset >>= 2;
4017 branch_offset &= 0x3ffffff;
4018 branch_insn |= branch_offset;
4019 bfd_putl32 (branch_insn, &contents[target]);
4025 elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED,
4026 struct bfd_link_info *link_info,
4031 struct elf_aarch64_link_hash_table *globals =
4032 elf_aarch64_hash_table (link_info);
4034 if (globals == NULL)
4037 /* Fix code to point to erratum 835769 stubs. */
4038 if (globals->fix_erratum_835769)
4040 struct erratum_835769_branch_to_stub_data data;
4042 data.output_section = sec;
4043 data.contents = contents;
4044 bfd_hash_traverse (&globals->stub_hash_table,
4045 make_branch_to_erratum_835769_stub, &data);
4051 /* Perform a relocation as part of a final link. */
4052 static bfd_reloc_status_type
4053 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
4056 asection *input_section,
4058 Elf_Internal_Rela *rel,
4060 struct bfd_link_info *info,
4062 struct elf_link_hash_entry *h,
4063 bfd_boolean *unresolved_reloc_p,
4064 bfd_boolean save_addend,
4065 bfd_vma *saved_addend,
4066 Elf_Internal_Sym *sym)
4068 Elf_Internal_Shdr *symtab_hdr;
4069 unsigned int r_type = howto->type;
4070 bfd_reloc_code_real_type bfd_r_type
4071 = elfNN_aarch64_bfd_reloc_from_howto (howto);
4072 bfd_reloc_code_real_type new_bfd_r_type;
4073 unsigned long r_symndx;
4074 bfd_byte *hit_data = contents + rel->r_offset;
4076 bfd_signed_vma signed_addend;
4077 struct elf_aarch64_link_hash_table *globals;
4078 bfd_boolean weak_undef_p;
4080 globals = elf_aarch64_hash_table (info);
4082 symtab_hdr = &elf_symtab_hdr (input_bfd);
4084 BFD_ASSERT (is_aarch64_elf (input_bfd));
4086 r_symndx = ELFNN_R_SYM (rel->r_info);
4088 /* It is possible to have linker relaxations on some TLS access
4089 models. Update our information here. */
4090 new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx);
4091 if (new_bfd_r_type != bfd_r_type)
4093 bfd_r_type = new_bfd_r_type;
4094 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4095 BFD_ASSERT (howto != NULL);
4096 r_type = howto->type;
4099 place = input_section->output_section->vma
4100 + input_section->output_offset + rel->r_offset;
4102 /* Get addend, accumulating the addend for consecutive relocs
4103 which refer to the same offset. */
4104 signed_addend = saved_addend ? *saved_addend : 0;
4105 signed_addend += rel->r_addend;
4107 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
4108 : bfd_is_und_section (sym_sec));
4110 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4111 it here if it is defined in a non-shared object. */
4113 && h->type == STT_GNU_IFUNC
4121 if ((input_section->flags & SEC_ALLOC) == 0
4122 || h->plt.offset == (bfd_vma) -1)
4125 /* STT_GNU_IFUNC symbol must go through PLT. */
4126 plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
4127 value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
4132 if (h->root.root.string)
4133 name = h->root.root.string;
4135 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4137 (*_bfd_error_handler)
4138 (_("%B: relocation %s against STT_GNU_IFUNC "
4139 "symbol `%s' isn't handled by %s"), input_bfd,
4140 howto->name, name, __FUNCTION__);
4141 bfd_set_error (bfd_error_bad_value);
4144 case BFD_RELOC_AARCH64_NN:
4145 if (rel->r_addend != 0)
4147 if (h->root.root.string)
4148 name = h->root.root.string;
4150 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4152 (*_bfd_error_handler)
4153 (_("%B: relocation %s against STT_GNU_IFUNC "
4154 "symbol `%s' has non-zero addend: %d"),
4155 input_bfd, howto->name, name, rel->r_addend);
4156 bfd_set_error (bfd_error_bad_value);
4160 /* Generate dynamic relocation only when there is a
4161 non-GOT reference in a shared object. */
4162 if (info->shared && h->non_got_ref)
4164 Elf_Internal_Rela outrel;
4167 /* Need a dynamic relocation to get the real function
4169 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4173 if (outrel.r_offset == (bfd_vma) -1
4174 || outrel.r_offset == (bfd_vma) -2)
4177 outrel.r_offset += (input_section->output_section->vma
4178 + input_section->output_offset);
4180 if (h->dynindx == -1
4182 || info->executable)
4184 /* This symbol is resolved locally. */
4185 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
4186 outrel.r_addend = (h->root.u.def.value
4187 + h->root.u.def.section->output_section->vma
4188 + h->root.u.def.section->output_offset);
4192 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4193 outrel.r_addend = 0;
4196 sreloc = globals->root.irelifunc;
4197 elf_append_rela (output_bfd, sreloc, &outrel);
4199 /* If this reloc is against an external symbol, we
4200 do not want to fiddle with the addend. Otherwise,
4201 we need to include the symbol value so that it
4202 becomes an addend for the dynamic reloc. For an
4203 internal symbol, we have updated addend. */
4204 return bfd_reloc_ok;
4207 case BFD_RELOC_AARCH64_JUMP26:
4208 case BFD_RELOC_AARCH64_CALL26:
4209 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4212 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
4214 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4215 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4216 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4217 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4218 base_got = globals->root.sgot;
4219 off = h->got.offset;
4221 if (base_got == NULL)
4224 if (off == (bfd_vma) -1)
4228 /* We can't use h->got.offset here to save state, or
4229 even just remember the offset, as finish_dynamic_symbol
4230 would use that as offset into .got. */
4232 if (globals->root.splt != NULL)
4234 plt_index = ((h->plt.offset - globals->plt_header_size) /
4235 globals->plt_entry_size);
4236 off = (plt_index + 3) * GOT_ENTRY_SIZE;
4237 base_got = globals->root.sgotplt;
4241 plt_index = h->plt.offset / globals->plt_entry_size;
4242 off = plt_index * GOT_ENTRY_SIZE;
4243 base_got = globals->root.igotplt;
4246 if (h->dynindx == -1
4250 /* This references the local definition. We must
4251 initialize this entry in the global offset table.
4252 Since the offset must always be a multiple of 8,
4253 we use the least significant bit to record
4254 whether we have initialized it already.
4256 When doing a dynamic link, we create a .rela.got
4257 relocation entry to initialize the value. This
4258 is done in the finish_dynamic_symbol routine. */
4263 bfd_put_NN (output_bfd, value,
4264 base_got->contents + off);
4265 /* Note that this is harmless as -1 | 1 still is -1. */
4269 value = (base_got->output_section->vma
4270 + base_got->output_offset + off);
4273 value = aarch64_calculate_got_entry_vma (h, globals, info,
4275 unresolved_reloc_p);
4276 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4278 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
4279 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4280 case BFD_RELOC_AARCH64_ADD_LO12:
4287 case BFD_RELOC_AARCH64_NONE:
4288 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4289 *unresolved_reloc_p = FALSE;
4290 return bfd_reloc_ok;
4292 case BFD_RELOC_AARCH64_NN:
4294 /* When generating a shared object or relocatable executable, these
4295 relocations are copied into the output file to be resolved at
4297 if (((info->shared == TRUE) || globals->root.is_relocatable_executable)
4298 && (input_section->flags & SEC_ALLOC)
4300 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4301 || h->root.type != bfd_link_hash_undefweak))
4303 Elf_Internal_Rela outrel;
4305 bfd_boolean skip, relocate;
4308 *unresolved_reloc_p = FALSE;
4313 outrel.r_addend = signed_addend;
4315 _bfd_elf_section_offset (output_bfd, info, input_section,
4317 if (outrel.r_offset == (bfd_vma) - 1)
4319 else if (outrel.r_offset == (bfd_vma) - 2)
4325 outrel.r_offset += (input_section->output_section->vma
4326 + input_section->output_offset);
4329 memset (&outrel, 0, sizeof outrel);
4332 && (!info->shared || !info->symbolic || !h->def_regular))
4333 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4338 /* On SVR4-ish systems, the dynamic loader cannot
4339 relocate the text and data segments independently,
4340 so the symbol does not matter. */
4342 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
4343 outrel.r_addend += value;
4346 sreloc = elf_section_data (input_section)->sreloc;
4347 if (sreloc == NULL || sreloc->contents == NULL)
4348 return bfd_reloc_notsupported;
4350 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
4351 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
4353 if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
4355 /* Sanity to check that we have previously allocated
4356 sufficient space in the relocation section for the
4357 number of relocations we actually want to emit. */
4361 /* If this reloc is against an external symbol, we do not want to
4362 fiddle with the addend. Otherwise, we need to include the symbol
4363 value so that it becomes an addend for the dynamic reloc. */
4365 return bfd_reloc_ok;
4367 return _bfd_final_link_relocate (howto, input_bfd, input_section,
4368 contents, rel->r_offset, value,
4372 value += signed_addend;
4375 case BFD_RELOC_AARCH64_JUMP26:
4376 case BFD_RELOC_AARCH64_CALL26:
4378 asection *splt = globals->root.splt;
4379 bfd_boolean via_plt_p =
4380 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
4382 /* A call to an undefined weak symbol is converted to a jump to
4383 the next instruction unless a PLT entry will be created.
4384 The jump to the next instruction is optimized as a NOP.
4385 Do the same for local undefined symbols. */
4386 if (weak_undef_p && ! via_plt_p)
4388 bfd_putl32 (INSN_NOP, hit_data);
4389 return bfd_reloc_ok;
4392 /* If the call goes through a PLT entry, make sure to
4393 check distance to the right destination address. */
4396 value = (splt->output_section->vma
4397 + splt->output_offset + h->plt.offset);
4398 *unresolved_reloc_p = FALSE;
4401 /* If the target symbol is global and marked as a function the
4402 relocation applies a function call or a tail call. In this
4403 situation we can veneer out of range branches. The veneers
4404 use IP0 and IP1 hence cannot be used arbitrary out of range
4405 branches that occur within the body of a function. */
4406 if (h && h->type == STT_FUNC)
4408 /* Check if a stub has to be inserted because the destination
4410 if (! aarch64_valid_branch_p (value, place))
4412 /* The target is out of reach, so redirect the branch to
4413 the local stub for this function. */
4414 struct elf_aarch64_stub_hash_entry *stub_entry;
4415 stub_entry = elfNN_aarch64_get_stub_entry (input_section,
4418 if (stub_entry != NULL)
4419 value = (stub_entry->stub_offset
4420 + stub_entry->stub_sec->output_offset
4421 + stub_entry->stub_sec->output_section->vma);
4425 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4426 signed_addend, weak_undef_p);
4429 case BFD_RELOC_AARCH64_16:
4431 case BFD_RELOC_AARCH64_32:
4433 case BFD_RELOC_AARCH64_ADD_LO12:
4434 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
4435 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4436 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
4437 case BFD_RELOC_AARCH64_BRANCH19:
4438 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
4439 case BFD_RELOC_AARCH64_LDST8_LO12:
4440 case BFD_RELOC_AARCH64_LDST16_LO12:
4441 case BFD_RELOC_AARCH64_LDST32_LO12:
4442 case BFD_RELOC_AARCH64_LDST64_LO12:
4443 case BFD_RELOC_AARCH64_LDST128_LO12:
4444 case BFD_RELOC_AARCH64_MOVW_G0_S:
4445 case BFD_RELOC_AARCH64_MOVW_G1_S:
4446 case BFD_RELOC_AARCH64_MOVW_G2_S:
4447 case BFD_RELOC_AARCH64_MOVW_G0:
4448 case BFD_RELOC_AARCH64_MOVW_G0_NC:
4449 case BFD_RELOC_AARCH64_MOVW_G1:
4450 case BFD_RELOC_AARCH64_MOVW_G1_NC:
4451 case BFD_RELOC_AARCH64_MOVW_G2:
4452 case BFD_RELOC_AARCH64_MOVW_G2_NC:
4453 case BFD_RELOC_AARCH64_MOVW_G3:
4454 case BFD_RELOC_AARCH64_16_PCREL:
4455 case BFD_RELOC_AARCH64_32_PCREL:
4456 case BFD_RELOC_AARCH64_64_PCREL:
4457 case BFD_RELOC_AARCH64_TSTBR14:
4458 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4459 signed_addend, weak_undef_p);
4462 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4463 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4464 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4465 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4466 if (globals->root.sgot == NULL)
4467 BFD_ASSERT (h != NULL);
4471 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
4473 unresolved_reloc_p);
4474 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4479 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4480 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4481 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4482 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4483 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4484 if (globals->root.sgot == NULL)
4485 return bfd_reloc_notsupported;
4487 value = (symbol_got_offset (input_bfd, h, r_symndx)
4488 + globals->root.sgot->output_section->vma
4489 + globals->root.sgot->output_offset);
4491 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4493 *unresolved_reloc_p = FALSE;
4496 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4497 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4498 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4499 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4500 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4501 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4502 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4503 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4504 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4505 signed_addend - tpoff_base (info),
4507 *unresolved_reloc_p = FALSE;
4510 case BFD_RELOC_AARCH64_TLSDESC_ADD:
4511 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4512 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4513 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4514 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
4515 case BFD_RELOC_AARCH64_TLSDESC_LDR:
4516 if (globals->root.sgot == NULL)
4517 return bfd_reloc_notsupported;
4518 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
4519 + globals->root.sgotplt->output_section->vma
4520 + globals->root.sgotplt->output_offset
4521 + globals->sgotplt_jump_table_size);
4523 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4525 *unresolved_reloc_p = FALSE;
4529 return bfd_reloc_notsupported;
4533 *saved_addend = value;
4535 /* Only apply the final relocation in a sequence. */
4537 return bfd_reloc_continue;
4539 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
4543 /* Handle TLS relaxations. Relaxing is possible for symbols that use
4544 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
4547 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
4548 is to then call final_link_relocate. Return other values in the
4551 static bfd_reloc_status_type
4552 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
4553 bfd *input_bfd, bfd_byte *contents,
4554 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
4556 bfd_boolean is_local = h == NULL;
4557 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
4560 BFD_ASSERT (globals && input_bfd && contents && rel);
4562 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
4564 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4565 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4568 /* GD->LE relaxation:
4569 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
4571 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
4573 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
4574 return bfd_reloc_continue;
4578 /* GD->IE relaxation:
4579 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
4581 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
4583 return bfd_reloc_continue;
4586 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4589 /* GD->LE relaxation:
4590 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
4592 bfd_putl32 (0xf2800000, contents + rel->r_offset);
4593 return bfd_reloc_continue;
4597 /* GD->IE relaxation:
4598 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
4600 insn = bfd_getl32 (contents + rel->r_offset);
4602 bfd_putl32 (insn, contents + rel->r_offset);
4603 return bfd_reloc_continue;
4606 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4609 /* GD->LE relaxation
4610 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
4611 bl __tls_get_addr => mrs x1, tpidr_el0
4612 nop => add x0, x1, x0
4615 /* First kill the tls_get_addr reloc on the bl instruction. */
4616 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
4617 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4619 bfd_putl32 (0xf2800000, contents + rel->r_offset);
4620 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
4621 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
4622 return bfd_reloc_continue;
4626 /* GD->IE relaxation
4627 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
4628 BL __tls_get_addr => mrs x1, tpidr_el0
4630 NOP => add x0, x1, x0
4633 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
4635 /* Remove the relocation on the BL instruction. */
4636 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
4638 bfd_putl32 (0xf9400000, contents + rel->r_offset);
4640 /* We choose to fixup the BL and NOP instructions using the
4641 offset from the second relocation to allow flexibility in
4642 scheduling instructions between the ADD and BL. */
4643 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
4644 bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4);
4645 return bfd_reloc_continue;
4648 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4649 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4650 /* GD->IE/LE relaxation:
4651 add x0, x0, #:tlsdesc_lo12:var => nop
4654 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
4655 return bfd_reloc_ok;
4657 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4658 /* IE->LE relaxation:
4659 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
4663 insn = bfd_getl32 (contents + rel->r_offset);
4664 bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset);
4666 return bfd_reloc_continue;
4668 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4669 /* IE->LE relaxation:
4670 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
4674 insn = bfd_getl32 (contents + rel->r_offset);
4675 bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset);
4677 return bfd_reloc_continue;
4680 return bfd_reloc_continue;
4683 return bfd_reloc_ok;
4686 /* Relocate an AArch64 ELF section. */
4689 elfNN_aarch64_relocate_section (bfd *output_bfd,
4690 struct bfd_link_info *info,
4692 asection *input_section,
4694 Elf_Internal_Rela *relocs,
4695 Elf_Internal_Sym *local_syms,
4696 asection **local_sections)
4698 Elf_Internal_Shdr *symtab_hdr;
4699 struct elf_link_hash_entry **sym_hashes;
4700 Elf_Internal_Rela *rel;
4701 Elf_Internal_Rela *relend;
4703 struct elf_aarch64_link_hash_table *globals;
4704 bfd_boolean save_addend = FALSE;
4707 globals = elf_aarch64_hash_table (info);
4709 symtab_hdr = &elf_symtab_hdr (input_bfd);
4710 sym_hashes = elf_sym_hashes (input_bfd);
4713 relend = relocs + input_section->reloc_count;
4714 for (; rel < relend; rel++)
4716 unsigned int r_type;
4717 bfd_reloc_code_real_type bfd_r_type;
4718 bfd_reloc_code_real_type relaxed_bfd_r_type;
4719 reloc_howto_type *howto;
4720 unsigned long r_symndx;
4721 Elf_Internal_Sym *sym;
4723 struct elf_link_hash_entry *h;
4725 bfd_reloc_status_type r;
4728 bfd_boolean unresolved_reloc = FALSE;
4729 char *error_message = NULL;
4731 r_symndx = ELFNN_R_SYM (rel->r_info);
4732 r_type = ELFNN_R_TYPE (rel->r_info);
4734 bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type);
4735 howto = bfd_reloc.howto;
4739 (*_bfd_error_handler)
4740 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
4741 input_bfd, input_section, r_type);
4744 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
4750 if (r_symndx < symtab_hdr->sh_info)
4752 sym = local_syms + r_symndx;
4753 sym_type = ELFNN_ST_TYPE (sym->st_info);
4754 sec = local_sections[r_symndx];
4756 /* An object file might have a reference to a local
4757 undefined symbol. This is a daft object file, but we
4758 should at least do something about it. */
4759 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
4760 && bfd_is_und_section (sec)
4761 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
4763 if (!info->callbacks->undefined_symbol
4764 (info, bfd_elf_string_from_elf_section
4765 (input_bfd, symtab_hdr->sh_link, sym->st_name),
4766 input_bfd, input_section, rel->r_offset, TRUE))
4770 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4772 /* Relocate against local STT_GNU_IFUNC symbol. */
4773 if (!info->relocatable
4774 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4776 h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
4781 /* Set STT_GNU_IFUNC symbol value. */
4782 h->root.u.def.value = sym->st_value;
4783 h->root.u.def.section = sec;
4788 bfd_boolean warned, ignored;
4790 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4791 r_symndx, symtab_hdr, sym_hashes,
4793 unresolved_reloc, warned, ignored);
4798 if (sec != NULL && discarded_section (sec))
4799 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
4800 rel, 1, relend, howto, 0, contents);
4802 if (info->relocatable)
4806 name = h->root.root.string;
4809 name = (bfd_elf_string_from_elf_section
4810 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4811 if (name == NULL || *name == '\0')
4812 name = bfd_section_name (input_bfd, sec);
4816 && r_type != R_AARCH64_NONE
4817 && r_type != R_AARCH64_NULL
4819 || h->root.type == bfd_link_hash_defined
4820 || h->root.type == bfd_link_hash_defweak)
4821 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
4823 (*_bfd_error_handler)
4824 ((sym_type == STT_TLS
4825 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4826 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4828 input_section, (long) rel->r_offset, howto->name, name);
4831 /* We relax only if we can see that there can be a valid transition
4832 from a reloc type to another.
4833 We call elfNN_aarch64_final_link_relocate unless we're completely
4834 done, i.e., the relaxation produced the final output we want. */
4836 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
4838 if (relaxed_bfd_r_type != bfd_r_type)
4840 bfd_r_type = relaxed_bfd_r_type;
4841 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4842 BFD_ASSERT (howto != NULL);
4843 r_type = howto->type;
4844 r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
4845 unresolved_reloc = 0;
4848 r = bfd_reloc_continue;
4850 /* There may be multiple consecutive relocations for the
4851 same offset. In that case we are supposed to treat the
4852 output of each relocation as the addend for the next. */
4853 if (rel + 1 < relend
4854 && rel->r_offset == rel[1].r_offset
4855 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
4856 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
4859 save_addend = FALSE;
4861 if (r == bfd_reloc_continue)
4862 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
4863 input_section, contents, rel,
4864 relocation, info, sec,
4865 h, &unresolved_reloc,
4866 save_addend, &addend, sym);
4868 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
4870 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4871 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4872 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
4874 bfd_boolean need_relocs = FALSE;
4879 off = symbol_got_offset (input_bfd, h, r_symndx);
4880 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4883 (info->shared || indx != 0) &&
4885 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4886 || h->root.type != bfd_link_hash_undefweak);
4888 BFD_ASSERT (globals->root.srelgot != NULL);
4892 Elf_Internal_Rela rela;
4893 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
4895 rela.r_offset = globals->root.sgot->output_section->vma +
4896 globals->root.sgot->output_offset + off;
4899 loc = globals->root.srelgot->contents;
4900 loc += globals->root.srelgot->reloc_count++
4901 * RELOC_SIZE (htab);
4902 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4906 bfd_put_NN (output_bfd,
4907 relocation - dtpoff_base (info),
4908 globals->root.sgot->contents + off
4913 /* This TLS symbol is global. We emit a
4914 relocation to fixup the tls offset at load
4917 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
4920 (globals->root.sgot->output_section->vma
4921 + globals->root.sgot->output_offset + off
4924 loc = globals->root.srelgot->contents;
4925 loc += globals->root.srelgot->reloc_count++
4926 * RELOC_SIZE (globals);
4927 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4928 bfd_put_NN (output_bfd, (bfd_vma) 0,
4929 globals->root.sgot->contents + off
4935 bfd_put_NN (output_bfd, (bfd_vma) 1,
4936 globals->root.sgot->contents + off);
4937 bfd_put_NN (output_bfd,
4938 relocation - dtpoff_base (info),
4939 globals->root.sgot->contents + off
4943 symbol_got_offset_mark (input_bfd, h, r_symndx);
4947 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4948 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4949 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
4951 bfd_boolean need_relocs = FALSE;
4956 off = symbol_got_offset (input_bfd, h, r_symndx);
4958 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4961 (info->shared || indx != 0) &&
4963 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4964 || h->root.type != bfd_link_hash_undefweak);
4966 BFD_ASSERT (globals->root.srelgot != NULL);
4970 Elf_Internal_Rela rela;
4973 rela.r_addend = relocation - dtpoff_base (info);
4977 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
4978 rela.r_offset = globals->root.sgot->output_section->vma +
4979 globals->root.sgot->output_offset + off;
4981 loc = globals->root.srelgot->contents;
4982 loc += globals->root.srelgot->reloc_count++
4983 * RELOC_SIZE (htab);
4985 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4987 bfd_put_NN (output_bfd, rela.r_addend,
4988 globals->root.sgot->contents + off);
4991 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
4992 globals->root.sgot->contents + off);
4994 symbol_got_offset_mark (input_bfd, h, r_symndx);
4998 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4999 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5000 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5001 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5002 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5003 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5004 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5005 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5008 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5009 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5010 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
5011 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
5013 bfd_boolean need_relocs = FALSE;
5014 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
5015 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
5017 need_relocs = (h == NULL
5018 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5019 || h->root.type != bfd_link_hash_undefweak);
5021 BFD_ASSERT (globals->root.srelgot != NULL);
5022 BFD_ASSERT (globals->root.sgot != NULL);
5027 Elf_Internal_Rela rela;
5028 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
5031 rela.r_offset = (globals->root.sgotplt->output_section->vma
5032 + globals->root.sgotplt->output_offset
5033 + off + globals->sgotplt_jump_table_size);
5036 rela.r_addend = relocation - dtpoff_base (info);
5038 /* Allocate the next available slot in the PLT reloc
5039 section to hold our R_AARCH64_TLSDESC, the next
5040 available slot is determined from reloc_count,
5041 which we step. But note, reloc_count was
5042 artifically moved down while allocating slots for
5043 real PLT relocs such that all of the PLT relocs
5044 will fit above the initial reloc_count and the
5045 extra stuff will fit below. */
5046 loc = globals->root.srelplt->contents;
5047 loc += globals->root.srelplt->reloc_count++
5048 * RELOC_SIZE (globals);
5050 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
5052 bfd_put_NN (output_bfd, (bfd_vma) 0,
5053 globals->root.sgotplt->contents + off +
5054 globals->sgotplt_jump_table_size);
5055 bfd_put_NN (output_bfd, (bfd_vma) 0,
5056 globals->root.sgotplt->contents + off +
5057 globals->sgotplt_jump_table_size +
5061 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
5072 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5073 because such sections are not SEC_ALLOC and thus ld.so will
5074 not process them. */
5075 if (unresolved_reloc
5076 && !((input_section->flags & SEC_DEBUGGING) != 0
5078 && _bfd_elf_section_offset (output_bfd, info, input_section,
5079 +rel->r_offset) != (bfd_vma) - 1)
5081 (*_bfd_error_handler)
5083 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5084 input_bfd, input_section, (long) rel->r_offset, howto->name,
5085 h->root.root.string);
5089 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
5093 case bfd_reloc_overflow:
5094 /* If the overflowing reloc was to an undefined symbol,
5095 we have already printed one error message and there
5096 is no point complaining again. */
5098 h->root.type != bfd_link_hash_undefined)
5099 && (!((*info->callbacks->reloc_overflow)
5100 (info, (h ? &h->root : NULL), name, howto->name,
5101 (bfd_vma) 0, input_bfd, input_section,
5106 case bfd_reloc_undefined:
5107 if (!((*info->callbacks->undefined_symbol)
5108 (info, name, input_bfd, input_section,
5109 rel->r_offset, TRUE)))
5113 case bfd_reloc_outofrange:
5114 error_message = _("out of range");
5117 case bfd_reloc_notsupported:
5118 error_message = _("unsupported relocation");
5121 case bfd_reloc_dangerous:
5122 /* error_message should already be set. */
5126 error_message = _("unknown error");
5130 BFD_ASSERT (error_message != NULL);
5131 if (!((*info->callbacks->reloc_dangerous)
5132 (info, error_message, input_bfd, input_section,
5143 /* Set the right machine number. */
5146 elfNN_aarch64_object_p (bfd *abfd)
5149 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
5151 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
5156 /* Function to keep AArch64 specific flags in the ELF header. */
5159 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
5161 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
5166 elf_elfheader (abfd)->e_flags = flags;
5167 elf_flags_init (abfd) = TRUE;
5173 /* Merge backend specific data from an object file to the output
5174 object file when linking. */
5177 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
5181 bfd_boolean flags_compatible = TRUE;
5184 /* Check if we have the same endianess. */
5185 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
5188 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
5191 /* The input BFD must have had its flags initialised. */
5192 /* The following seems bogus to me -- The flags are initialized in
5193 the assembler but I don't think an elf_flags_init field is
5194 written into the object. */
5195 /* BFD_ASSERT (elf_flags_init (ibfd)); */
5197 in_flags = elf_elfheader (ibfd)->e_flags;
5198 out_flags = elf_elfheader (obfd)->e_flags;
5200 if (!elf_flags_init (obfd))
5202 /* If the input is the default architecture and had the default
5203 flags then do not bother setting the flags for the output
5204 architecture, instead allow future merges to do this. If no
5205 future merges ever set these flags then they will retain their
5206 uninitialised values, which surprise surprise, correspond
5207 to the default values. */
5208 if (bfd_get_arch_info (ibfd)->the_default
5209 && elf_elfheader (ibfd)->e_flags == 0)
5212 elf_flags_init (obfd) = TRUE;
5213 elf_elfheader (obfd)->e_flags = in_flags;
5215 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
5216 && bfd_get_arch_info (obfd)->the_default)
5217 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
5218 bfd_get_mach (ibfd));
5223 /* Identical flags must be compatible. */
5224 if (in_flags == out_flags)
5227 /* Check to see if the input BFD actually contains any sections. If
5228 not, its flags may not have been initialised either, but it
5229 cannot actually cause any incompatiblity. Do not short-circuit
5230 dynamic objects; their section list may be emptied by
5231 elf_link_add_object_symbols.
5233 Also check to see if there are no code sections in the input.
5234 In this case there is no need to check for code specific flags.
5235 XXX - do we need to worry about floating-point format compatability
5236 in data sections ? */
5237 if (!(ibfd->flags & DYNAMIC))
5239 bfd_boolean null_input_bfd = TRUE;
5240 bfd_boolean only_data_sections = TRUE;
5242 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
5244 if ((bfd_get_section_flags (ibfd, sec)
5245 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5246 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
5247 only_data_sections = FALSE;
5249 null_input_bfd = FALSE;
5253 if (null_input_bfd || only_data_sections)
5257 return flags_compatible;
5260 /* Display the flags field. */
5263 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
5265 FILE *file = (FILE *) ptr;
5266 unsigned long flags;
5268 BFD_ASSERT (abfd != NULL && ptr != NULL);
5270 /* Print normal ELF private data. */
5271 _bfd_elf_print_private_bfd_data (abfd, ptr);
5273 flags = elf_elfheader (abfd)->e_flags;
5274 /* Ignore init flag - it may not be set, despite the flags field
5275 containing valid data. */
5277 /* xgettext:c-format */
5278 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
5281 fprintf (file, _("<Unrecognised flag bits set>"));
5288 /* Update the got entry reference counts for the section being removed. */
5291 elfNN_aarch64_gc_sweep_hook (bfd *abfd,
5292 struct bfd_link_info *info,
5294 const Elf_Internal_Rela * relocs)
5296 struct elf_aarch64_link_hash_table *htab;
5297 Elf_Internal_Shdr *symtab_hdr;
5298 struct elf_link_hash_entry **sym_hashes;
5299 struct elf_aarch64_local_symbol *locals;
5300 const Elf_Internal_Rela *rel, *relend;
5302 if (info->relocatable)
5305 htab = elf_aarch64_hash_table (info);
5310 elf_section_data (sec)->local_dynrel = NULL;
5312 symtab_hdr = &elf_symtab_hdr (abfd);
5313 sym_hashes = elf_sym_hashes (abfd);
5315 locals = elf_aarch64_locals (abfd);
5317 relend = relocs + sec->reloc_count;
5318 for (rel = relocs; rel < relend; rel++)
5320 unsigned long r_symndx;
5321 unsigned int r_type;
5322 struct elf_link_hash_entry *h = NULL;
5324 r_symndx = ELFNN_R_SYM (rel->r_info);
5326 if (r_symndx >= symtab_hdr->sh_info)
5329 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5330 while (h->root.type == bfd_link_hash_indirect
5331 || h->root.type == bfd_link_hash_warning)
5332 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5336 Elf_Internal_Sym *isym;
5338 /* A local symbol. */
5339 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5342 /* Check relocation against local STT_GNU_IFUNC symbol. */
5344 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5346 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE);
5354 struct elf_aarch64_link_hash_entry *eh;
5355 struct elf_dyn_relocs **pp;
5356 struct elf_dyn_relocs *p;
5358 eh = (struct elf_aarch64_link_hash_entry *) h;
5360 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
5363 /* Everything must go for SEC. */
5369 r_type = ELFNN_R_TYPE (rel->r_info);
5370 switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx))
5372 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5373 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5374 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5375 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5376 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5377 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5378 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5379 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5380 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5381 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5382 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5383 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5384 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5385 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5386 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5387 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5388 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5389 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5390 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5391 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5392 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5395 if (h->got.refcount > 0)
5396 h->got.refcount -= 1;
5398 if (h->type == STT_GNU_IFUNC)
5400 if (h->plt.refcount > 0)
5401 h->plt.refcount -= 1;
5404 else if (locals != NULL)
5406 if (locals[r_symndx].got_refcount > 0)
5407 locals[r_symndx].got_refcount -= 1;
5411 case BFD_RELOC_AARCH64_CALL26:
5412 case BFD_RELOC_AARCH64_JUMP26:
5413 /* If this is a local symbol then we resolve it
5414 directly without creating a PLT entry. */
5418 if (h->plt.refcount > 0)
5419 h->plt.refcount -= 1;
5422 case BFD_RELOC_AARCH64_MOVW_G0_NC:
5423 case BFD_RELOC_AARCH64_MOVW_G1_NC:
5424 case BFD_RELOC_AARCH64_MOVW_G2_NC:
5425 case BFD_RELOC_AARCH64_MOVW_G3:
5426 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
5427 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5428 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
5429 case BFD_RELOC_AARCH64_NN:
5430 if (h != NULL && info->executable)
5432 if (h->plt.refcount > 0)
5433 h->plt.refcount -= 1;
5445 /* Adjust a symbol defined by a dynamic object and referenced by a
5446 regular object. The current definition is in some section of the
5447 dynamic object, but we're not including those sections. We have to
5448 change the definition to something the rest of the link can
5452 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
5453 struct elf_link_hash_entry *h)
5455 struct elf_aarch64_link_hash_table *htab;
5458 /* If this is a function, put it in the procedure linkage table. We
5459 will fill in the contents of the procedure linkage table later,
5460 when we know the address of the .got section. */
5461 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
5463 if (h->plt.refcount <= 0
5464 || (h->type != STT_GNU_IFUNC
5465 && (SYMBOL_CALLS_LOCAL (info, h)
5466 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
5467 && h->root.type == bfd_link_hash_undefweak))))
5469 /* This case can occur if we saw a CALL26 reloc in
5470 an input file, but the symbol wasn't referred to
5471 by a dynamic object or all references were
5472 garbage collected. In which case we can end up
5474 h->plt.offset = (bfd_vma) - 1;
5481 /* It's possible that we incorrectly decided a .plt reloc was
5482 needed for an R_X86_64_PC32 reloc to a non-function sym in
5483 check_relocs. We can't decide accurately between function and
5484 non-function syms in check-relocs; Objects loaded later in
5485 the link may change h->type. So fix it now. */
5486 h->plt.offset = (bfd_vma) - 1;
5489 /* If this is a weak symbol, and there is a real definition, the
5490 processor independent code will have arranged for us to see the
5491 real definition first, and we can just use the same value. */
5492 if (h->u.weakdef != NULL)
5494 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
5495 || h->u.weakdef->root.type == bfd_link_hash_defweak);
5496 h->root.u.def.section = h->u.weakdef->root.u.def.section;
5497 h->root.u.def.value = h->u.weakdef->root.u.def.value;
5498 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
5499 h->non_got_ref = h->u.weakdef->non_got_ref;
5503 /* If we are creating a shared library, we must presume that the
5504 only references to the symbol are via the global offset table.
5505 For such cases we need not do anything here; the relocations will
5506 be handled correctly by relocate_section. */
5510 /* If there are no references to this symbol that do not use the
5511 GOT, we don't need to generate a copy reloc. */
5512 if (!h->non_got_ref)
5515 /* If -z nocopyreloc was given, we won't generate them either. */
5516 if (info->nocopyreloc)
5522 /* We must allocate the symbol in our .dynbss section, which will
5523 become part of the .bss section of the executable. There will be
5524 an entry for this symbol in the .dynsym section. The dynamic
5525 object will contain position independent code, so all references
5526 from the dynamic object to this symbol will go through the global
5527 offset table. The dynamic linker will use the .dynsym entry to
5528 determine the address it must put in the global offset table, so
5529 both the dynamic object and the regular object will refer to the
5530 same memory location for the variable. */
5532 htab = elf_aarch64_hash_table (info);
5534 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
5535 to copy the initial value out of the dynamic object and into the
5536 runtime process image. */
5537 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
5539 htab->srelbss->size += RELOC_SIZE (htab);
5545 return _bfd_elf_adjust_dynamic_copy (h, s);
5550 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
5552 struct elf_aarch64_local_symbol *locals;
5553 locals = elf_aarch64_locals (abfd);
5556 locals = (struct elf_aarch64_local_symbol *)
5557 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
5560 elf_aarch64_locals (abfd) = locals;
5565 /* Create the .got section to hold the global offset table. */
5568 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
5570 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5573 struct elf_link_hash_entry *h;
5574 struct elf_link_hash_table *htab = elf_hash_table (info);
5576 /* This function may be called more than once. */
5577 s = bfd_get_linker_section (abfd, ".got");
5581 flags = bed->dynamic_sec_flags;
5583 s = bfd_make_section_anyway_with_flags (abfd,
5584 (bed->rela_plts_and_copies_p
5585 ? ".rela.got" : ".rel.got"),
5586 (bed->dynamic_sec_flags
5589 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
5593 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
5595 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
5598 htab->sgot->size += GOT_ENTRY_SIZE;
5600 if (bed->want_got_sym)
5602 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
5603 (or .got.plt) section. We don't do this in the linker script
5604 because we don't want to define the symbol if we are not creating
5605 a global offset table. */
5606 h = _bfd_elf_define_linkage_sym (abfd, info, s,
5607 "_GLOBAL_OFFSET_TABLE_");
5608 elf_hash_table (info)->hgot = h;
5613 if (bed->want_got_plt)
5615 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
5617 || !bfd_set_section_alignment (abfd, s,
5618 bed->s->log_file_align))
5623 /* The first bit of the global offset table is the header. */
5624 s->size += bed->got_header_size;
5629 /* Look through the relocs for a section during the first phase. */
5632 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
5633 asection *sec, const Elf_Internal_Rela *relocs)
5635 Elf_Internal_Shdr *symtab_hdr;
5636 struct elf_link_hash_entry **sym_hashes;
5637 const Elf_Internal_Rela *rel;
5638 const Elf_Internal_Rela *rel_end;
5641 struct elf_aarch64_link_hash_table *htab;
5643 if (info->relocatable)
5646 BFD_ASSERT (is_aarch64_elf (abfd));
5648 htab = elf_aarch64_hash_table (info);
5651 symtab_hdr = &elf_symtab_hdr (abfd);
5652 sym_hashes = elf_sym_hashes (abfd);
5654 rel_end = relocs + sec->reloc_count;
5655 for (rel = relocs; rel < rel_end; rel++)
5657 struct elf_link_hash_entry *h;
5658 unsigned long r_symndx;
5659 unsigned int r_type;
5660 bfd_reloc_code_real_type bfd_r_type;
5661 Elf_Internal_Sym *isym;
5663 r_symndx = ELFNN_R_SYM (rel->r_info);
5664 r_type = ELFNN_R_TYPE (rel->r_info);
5666 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
5668 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
5673 if (r_symndx < symtab_hdr->sh_info)
5675 /* A local symbol. */
5676 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5681 /* Check relocation against local STT_GNU_IFUNC symbol. */
5682 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5684 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
5689 /* Fake a STT_GNU_IFUNC symbol. */
5690 h->type = STT_GNU_IFUNC;
5693 h->forced_local = 1;
5694 h->root.type = bfd_link_hash_defined;
5701 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5702 while (h->root.type == bfd_link_hash_indirect
5703 || h->root.type == bfd_link_hash_warning)
5704 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5706 /* PR15323, ref flags aren't set for references in the same
5708 h->root.non_ir_ref = 1;
5711 /* Could be done earlier, if h were already available. */
5712 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
5716 /* Create the ifunc sections for static executables. If we
5717 never see an indirect function symbol nor we are building
5718 a static executable, those sections will be empty and
5719 won't appear in output. */
5725 case BFD_RELOC_AARCH64_NN:
5726 case BFD_RELOC_AARCH64_CALL26:
5727 case BFD_RELOC_AARCH64_JUMP26:
5728 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5729 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5730 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5731 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5732 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5733 case BFD_RELOC_AARCH64_ADD_LO12:
5734 if (htab->root.dynobj == NULL)
5735 htab->root.dynobj = abfd;
5736 if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
5741 /* It is referenced by a non-shared object. */
5743 h->root.non_ir_ref = 1;
5748 case BFD_RELOC_AARCH64_NN:
5750 /* We don't need to handle relocs into sections not going into
5751 the "real" output. */
5752 if ((sec->flags & SEC_ALLOC) == 0)
5760 h->plt.refcount += 1;
5761 h->pointer_equality_needed = 1;
5764 /* No need to do anything if we're not creating a shared
5770 struct elf_dyn_relocs *p;
5771 struct elf_dyn_relocs **head;
5773 /* We must copy these reloc types into the output file.
5774 Create a reloc section in dynobj and make room for
5778 if (htab->root.dynobj == NULL)
5779 htab->root.dynobj = abfd;
5781 sreloc = _bfd_elf_make_dynamic_reloc_section
5782 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
5788 /* If this is a global symbol, we count the number of
5789 relocations we need for this symbol. */
5792 struct elf_aarch64_link_hash_entry *eh;
5793 eh = (struct elf_aarch64_link_hash_entry *) h;
5794 head = &eh->dyn_relocs;
5798 /* Track dynamic relocs needed for local syms too.
5799 We really need local syms available to do this
5805 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5810 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5814 /* Beware of type punned pointers vs strict aliasing
5816 vpp = &(elf_section_data (s)->local_dynrel);
5817 head = (struct elf_dyn_relocs **) vpp;
5821 if (p == NULL || p->sec != sec)
5823 bfd_size_type amt = sizeof *p;
5824 p = ((struct elf_dyn_relocs *)
5825 bfd_zalloc (htab->root.dynobj, amt));
5838 /* RR: We probably want to keep a consistency check that
5839 there are no dangling GOT_PAGE relocs. */
5840 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5841 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5842 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5843 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5844 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5845 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5846 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5847 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5848 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5849 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5850 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5851 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5852 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5853 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5854 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5855 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5856 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5857 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5858 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5859 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5860 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5863 unsigned old_got_type;
5865 got_type = aarch64_reloc_got_type (bfd_r_type);
5869 h->got.refcount += 1;
5870 old_got_type = elf_aarch64_hash_entry (h)->got_type;
5874 struct elf_aarch64_local_symbol *locals;
5876 if (!elfNN_aarch64_allocate_local_symbols
5877 (abfd, symtab_hdr->sh_info))
5880 locals = elf_aarch64_locals (abfd);
5881 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
5882 locals[r_symndx].got_refcount += 1;
5883 old_got_type = locals[r_symndx].got_type;
5886 /* If a variable is accessed with both general dynamic TLS
5887 methods, two slots may be created. */
5888 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
5889 got_type |= old_got_type;
5891 /* We will already have issued an error message if there
5892 is a TLS/non-TLS mismatch, based on the symbol type.
5893 So just combine any TLS types needed. */
5894 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
5895 && got_type != GOT_NORMAL)
5896 got_type |= old_got_type;
5898 /* If the symbol is accessed by both IE and GD methods, we
5899 are able to relax. Turn off the GD flag, without
5900 messing up with any other kind of TLS types that may be
5902 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
5903 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
5905 if (old_got_type != got_type)
5908 elf_aarch64_hash_entry (h)->got_type = got_type;
5911 struct elf_aarch64_local_symbol *locals;
5912 locals = elf_aarch64_locals (abfd);
5913 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
5914 locals[r_symndx].got_type = got_type;
5918 if (htab->root.dynobj == NULL)
5919 htab->root.dynobj = abfd;
5920 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
5925 case BFD_RELOC_AARCH64_MOVW_G0_NC:
5926 case BFD_RELOC_AARCH64_MOVW_G1_NC:
5927 case BFD_RELOC_AARCH64_MOVW_G2_NC:
5928 case BFD_RELOC_AARCH64_MOVW_G3:
5931 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
5932 (*_bfd_error_handler)
5933 (_("%B: relocation %s against `%s' can not be used when making "
5934 "a shared object; recompile with -fPIC"),
5935 abfd, elfNN_aarch64_howto_table[howto_index].name,
5936 (h) ? h->root.root.string : "a local symbol");
5937 bfd_set_error (bfd_error_bad_value);
5941 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
5942 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5943 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
5944 if (h != NULL && info->executable)
5946 /* If this reloc is in a read-only section, we might
5947 need a copy reloc. We can't check reliably at this
5948 stage whether the section is read-only, as input
5949 sections have not yet been mapped to output sections.
5950 Tentatively set the flag for now, and correct in
5951 adjust_dynamic_symbol. */
5953 h->plt.refcount += 1;
5954 h->pointer_equality_needed = 1;
5956 /* FIXME:: RR need to handle these in shared libraries
5957 and essentially bomb out as these being non-PIC
5958 relocations in shared libraries. */
5961 case BFD_RELOC_AARCH64_CALL26:
5962 case BFD_RELOC_AARCH64_JUMP26:
5963 /* If this is a local symbol then we resolve it
5964 directly without creating a PLT entry. */
5969 if (h->plt.refcount <= 0)
5970 h->plt.refcount = 1;
5972 h->plt.refcount += 1;
5983 /* Treat mapping symbols as special target symbols. */
5986 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
5989 return bfd_is_aarch64_special_symbol_name (sym->name,
5990 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
5993 /* This is a copy of elf_find_function () from elf.c except that
5994 AArch64 mapping symbols are ignored when looking for function names. */
5997 aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
6001 const char **filename_ptr,
6002 const char **functionname_ptr)
6004 const char *filename = NULL;
6005 asymbol *func = NULL;
6006 bfd_vma low_func = 0;
6009 for (p = symbols; *p != NULL; p++)
6013 q = (elf_symbol_type *) * p;
6015 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
6020 filename = bfd_asymbol_name (&q->symbol);
6024 /* Skip mapping symbols. */
6025 if ((q->symbol.flags & BSF_LOCAL)
6026 && (bfd_is_aarch64_special_symbol_name
6027 (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
6030 if (bfd_get_section (&q->symbol) == section
6031 && q->symbol.value >= low_func && q->symbol.value <= offset)
6033 func = (asymbol *) q;
6034 low_func = q->symbol.value;
6044 *filename_ptr = filename;
6045 if (functionname_ptr)
6046 *functionname_ptr = bfd_asymbol_name (func);
6052 /* Find the nearest line to a particular section and offset, for error
6053 reporting. This code is a duplicate of the code in elf.c, except
6054 that it uses aarch64_elf_find_function. */
6057 elfNN_aarch64_find_nearest_line (bfd *abfd,
6061 const char **filename_ptr,
6062 const char **functionname_ptr,
6063 unsigned int *line_ptr,
6064 unsigned int *discriminator_ptr)
6066 bfd_boolean found = FALSE;
6068 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
6069 filename_ptr, functionname_ptr,
6070 line_ptr, discriminator_ptr,
6071 dwarf_debug_sections, 0,
6072 &elf_tdata (abfd)->dwarf2_find_line_info))
6074 if (!*functionname_ptr)
6075 aarch64_elf_find_function (abfd, symbols, section, offset,
6076 *filename_ptr ? NULL : filename_ptr,
6082 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
6083 toolchain uses DWARF1. */
6085 if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
6086 &found, filename_ptr,
6087 functionname_ptr, line_ptr,
6088 &elf_tdata (abfd)->line_info))
6091 if (found && (*functionname_ptr || *line_ptr))
6094 if (symbols == NULL)
6097 if (!aarch64_elf_find_function (abfd, symbols, section, offset,
6098 filename_ptr, functionname_ptr))
6106 elfNN_aarch64_find_inliner_info (bfd *abfd,
6107 const char **filename_ptr,
6108 const char **functionname_ptr,
6109 unsigned int *line_ptr)
6112 found = _bfd_dwarf2_find_inliner_info
6113 (abfd, filename_ptr,
6114 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
6120 elfNN_aarch64_post_process_headers (bfd *abfd,
6121 struct bfd_link_info *link_info)
6123 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
6125 i_ehdrp = elf_elfheader (abfd);
6126 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
6128 _bfd_elf_post_process_headers (abfd, link_info);
6131 static enum elf_reloc_type_class
6132 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
6133 const asection *rel_sec ATTRIBUTE_UNUSED,
6134 const Elf_Internal_Rela *rela)
6136 switch ((int) ELFNN_R_TYPE (rela->r_info))
6138 case AARCH64_R (RELATIVE):
6139 return reloc_class_relative;
6140 case AARCH64_R (JUMP_SLOT):
6141 return reloc_class_plt;
6142 case AARCH64_R (COPY):
6143 return reloc_class_copy;
6145 return reloc_class_normal;
6149 /* Handle an AArch64 specific section when reading an object file. This is
6150 called when bfd_section_from_shdr finds a section with an unknown
6154 elfNN_aarch64_section_from_shdr (bfd *abfd,
6155 Elf_Internal_Shdr *hdr,
6156 const char *name, int shindex)
6158 /* There ought to be a place to keep ELF backend specific flags, but
6159 at the moment there isn't one. We just keep track of the
6160 sections by their name, instead. Fortunately, the ABI gives
6161 names for all the AArch64 specific sections, so we will probably get
6163 switch (hdr->sh_type)
6165 case SHT_AARCH64_ATTRIBUTES:
6172 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
6178 /* A structure used to record a list of sections, independently
6179 of the next and prev fields in the asection structure. */
6180 typedef struct section_list
6183 struct section_list *next;
6184 struct section_list *prev;
6188 /* Unfortunately we need to keep a list of sections for which
6189 an _aarch64_elf_section_data structure has been allocated. This
6190 is because it is possible for functions like elfNN_aarch64_write_section
6191 to be called on a section which has had an elf_data_structure
6192 allocated for it (and so the used_by_bfd field is valid) but
6193 for which the AArch64 extended version of this structure - the
6194 _aarch64_elf_section_data structure - has not been allocated. */
6195 static section_list *sections_with_aarch64_elf_section_data = NULL;
6198 record_section_with_aarch64_elf_section_data (asection *sec)
6200 struct section_list *entry;
6202 entry = bfd_malloc (sizeof (*entry));
6206 entry->next = sections_with_aarch64_elf_section_data;
6208 if (entry->next != NULL)
6209 entry->next->prev = entry;
6210 sections_with_aarch64_elf_section_data = entry;
6213 static struct section_list *
6214 find_aarch64_elf_section_entry (asection *sec)
6216 struct section_list *entry;
6217 static struct section_list *last_entry = NULL;
6219 /* This is a short cut for the typical case where the sections are added
6220 to the sections_with_aarch64_elf_section_data list in forward order and
6221 then looked up here in backwards order. This makes a real difference
6222 to the ld-srec/sec64k.exp linker test. */
6223 entry = sections_with_aarch64_elf_section_data;
6224 if (last_entry != NULL)
6226 if (last_entry->sec == sec)
6228 else if (last_entry->next != NULL && last_entry->next->sec == sec)
6229 entry = last_entry->next;
6232 for (; entry; entry = entry->next)
6233 if (entry->sec == sec)
6237 /* Record the entry prior to this one - it is the entry we are
6238 most likely to want to locate next time. Also this way if we
6239 have been called from
6240 unrecord_section_with_aarch64_elf_section_data () we will not
6241 be caching a pointer that is about to be freed. */
6242 last_entry = entry->prev;
6248 unrecord_section_with_aarch64_elf_section_data (asection *sec)
6250 struct section_list *entry;
6252 entry = find_aarch64_elf_section_entry (sec);
6256 if (entry->prev != NULL)
6257 entry->prev->next = entry->next;
6258 if (entry->next != NULL)
6259 entry->next->prev = entry->prev;
6260 if (entry == sections_with_aarch64_elf_section_data)
6261 sections_with_aarch64_elf_section_data = entry->next;
6270 struct bfd_link_info *info;
6273 int (*func) (void *, const char *, Elf_Internal_Sym *,
6274 asection *, struct elf_link_hash_entry *);
6275 } output_arch_syminfo;
6277 enum map_symbol_type
6284 /* Output a single mapping symbol. */
6287 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
6288 enum map_symbol_type type, bfd_vma offset)
6290 static const char *names[2] = { "$x", "$d" };
6291 Elf_Internal_Sym sym;
6293 sym.st_value = (osi->sec->output_section->vma
6294 + osi->sec->output_offset + offset);
6297 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
6298 sym.st_shndx = osi->sec_shndx;
6299 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
6304 /* Output mapping symbols for PLT entries associated with H. */
6307 elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf)
6309 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
6312 if (h->root.type == bfd_link_hash_indirect)
6315 if (h->root.type == bfd_link_hash_warning)
6316 /* When warning symbols are created, they **replace** the "real"
6317 entry in the hash table, thus we never get to see the real
6318 symbol in a hash traversal. So look at it now. */
6319 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6321 if (h->plt.offset == (bfd_vma) - 1)
6324 addr = h->plt.offset;
6327 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6334 /* Output a single local symbol for a generated stub. */
6337 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
6338 bfd_vma offset, bfd_vma size)
6340 Elf_Internal_Sym sym;
6342 sym.st_value = (osi->sec->output_section->vma
6343 + osi->sec->output_offset + offset);
6346 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
6347 sym.st_shndx = osi->sec_shndx;
6348 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
6352 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
6354 struct elf_aarch64_stub_hash_entry *stub_entry;
6358 output_arch_syminfo *osi;
6360 /* Massage our args to the form they really have. */
6361 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
6362 osi = (output_arch_syminfo *) in_arg;
6364 stub_sec = stub_entry->stub_sec;
6366 /* Ensure this stub is attached to the current section being
6368 if (stub_sec != osi->sec)
6371 addr = (bfd_vma) stub_entry->stub_offset;
6373 stub_name = stub_entry->output_name;
6375 switch (stub_entry->stub_type)
6377 case aarch64_stub_adrp_branch:
6378 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
6379 sizeof (aarch64_adrp_branch_stub)))
6381 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6384 case aarch64_stub_long_branch:
6385 if (!elfNN_aarch64_output_stub_sym
6386 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
6388 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6390 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
6393 case aarch64_stub_erratum_835769_veneer:
6394 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
6395 sizeof (aarch64_erratum_835769_stub)))
6397 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
6407 /* Output mapping symbols for linker generated sections. */
6410 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
6411 struct bfd_link_info *info,
6413 int (*func) (void *, const char *,
6416 struct elf_link_hash_entry
6419 output_arch_syminfo osi;
6420 struct elf_aarch64_link_hash_table *htab;
6422 htab = elf_aarch64_hash_table (info);
6428 /* Long calls stubs. */
6429 if (htab->stub_bfd && htab->stub_bfd->sections)
6433 for (stub_sec = htab->stub_bfd->sections;
6434 stub_sec != NULL; stub_sec = stub_sec->next)
6436 /* Ignore non-stub sections. */
6437 if (!strstr (stub_sec->name, STUB_SUFFIX))
6442 osi.sec_shndx = _bfd_elf_section_from_bfd_section
6443 (output_bfd, osi.sec->output_section);
6445 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
6450 /* Finally, output mapping symbols for the PLT. */
6451 if (!htab->root.splt || htab->root.splt->size == 0)
6454 /* For now live without mapping symbols for the plt. */
6455 osi.sec_shndx = _bfd_elf_section_from_bfd_section
6456 (output_bfd, htab->root.splt->output_section);
6457 osi.sec = htab->root.splt;
6459 elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map,
6466 /* Allocate target specific section data. */
6469 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
6471 if (!sec->used_by_bfd)
6473 _aarch64_elf_section_data *sdata;
6474 bfd_size_type amt = sizeof (*sdata);
6476 sdata = bfd_zalloc (abfd, amt);
6479 sec->used_by_bfd = sdata;
6482 record_section_with_aarch64_elf_section_data (sec);
6484 return _bfd_elf_new_section_hook (abfd, sec);
6489 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
6491 void *ignore ATTRIBUTE_UNUSED)
6493 unrecord_section_with_aarch64_elf_section_data (sec);
6497 elfNN_aarch64_close_and_cleanup (bfd *abfd)
6500 bfd_map_over_sections (abfd,
6501 unrecord_section_via_map_over_sections, NULL);
6503 return _bfd_elf_close_and_cleanup (abfd);
6507 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
6510 bfd_map_over_sections (abfd,
6511 unrecord_section_via_map_over_sections, NULL);
6513 return _bfd_free_cached_info (abfd);
6516 /* Create dynamic sections. This is different from the ARM backend in that
6517 the got, plt, gotplt and their relocation sections are all created in the
6518 standard part of the bfd elf backend. */
6521 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
6522 struct bfd_link_info *info)
6524 struct elf_aarch64_link_hash_table *htab;
6526 /* We need to create .got section. */
6527 if (!aarch64_elf_create_got_section (dynobj, info))
6530 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
6533 htab = elf_aarch64_hash_table (info);
6534 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
6536 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
6538 if (!htab->sdynbss || (!info->shared && !htab->srelbss))
6545 /* Allocate space in .plt, .got and associated reloc sections for
6549 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6551 struct bfd_link_info *info;
6552 struct elf_aarch64_link_hash_table *htab;
6553 struct elf_aarch64_link_hash_entry *eh;
6554 struct elf_dyn_relocs *p;
6556 /* An example of a bfd_link_hash_indirect symbol is versioned
6557 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
6558 -> __gxx_personality_v0(bfd_link_hash_defined)
6560 There is no need to process bfd_link_hash_indirect symbols here
6561 because we will also be presented with the concrete instance of
6562 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
6563 called to copy all relevant data from the generic to the concrete
6566 if (h->root.type == bfd_link_hash_indirect)
6569 if (h->root.type == bfd_link_hash_warning)
6570 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6572 info = (struct bfd_link_info *) inf;
6573 htab = elf_aarch64_hash_table (info);
6575 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
6576 here if it is defined and referenced in a non-shared object. */
6577 if (h->type == STT_GNU_IFUNC
6580 else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
6582 /* Make sure this symbol is output as a dynamic symbol.
6583 Undefined weak syms won't yet be marked as dynamic. */
6584 if (h->dynindx == -1 && !h->forced_local)
6586 if (!bfd_elf_link_record_dynamic_symbol (info, h))
6590 if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
6592 asection *s = htab->root.splt;
6594 /* If this is the first .plt entry, make room for the special
6597 s->size += htab->plt_header_size;
6599 h->plt.offset = s->size;
6601 /* If this symbol is not defined in a regular file, and we are
6602 not generating a shared library, then set the symbol to this
6603 location in the .plt. This is required to make function
6604 pointers compare as equal between the normal executable and
6605 the shared library. */
6606 if (!info->shared && !h->def_regular)
6608 h->root.u.def.section = s;
6609 h->root.u.def.value = h->plt.offset;
6612 /* Make room for this entry. For now we only create the
6613 small model PLT entries. We later need to find a way
6614 of relaxing into these from the large model PLT entries. */
6615 s->size += PLT_SMALL_ENTRY_SIZE;
6617 /* We also need to make an entry in the .got.plt section, which
6618 will be placed in the .got section by the linker script. */
6619 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
6621 /* We also need to make an entry in the .rela.plt section. */
6622 htab->root.srelplt->size += RELOC_SIZE (htab);
6624 /* We need to ensure that all GOT entries that serve the PLT
6625 are consecutive with the special GOT slots [0] [1] and
6626 [2]. Any addtional relocations, such as
6627 R_AARCH64_TLSDESC, must be placed after the PLT related
6628 entries. We abuse the reloc_count such that during
6629 sizing we adjust reloc_count to indicate the number of
6630 PLT related reserved entries. In subsequent phases when
6631 filling in the contents of the reloc entries, PLT related
6632 entries are placed by computing their PLT index (0
6633 .. reloc_count). While other none PLT relocs are placed
6634 at the slot indicated by reloc_count and reloc_count is
6637 htab->root.srelplt->reloc_count++;
6641 h->plt.offset = (bfd_vma) - 1;
6647 h->plt.offset = (bfd_vma) - 1;
6651 eh = (struct elf_aarch64_link_hash_entry *) h;
6652 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
6654 if (h->got.refcount > 0)
6657 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
6659 h->got.offset = (bfd_vma) - 1;
6661 dyn = htab->root.dynamic_sections_created;
6663 /* Make sure this symbol is output as a dynamic symbol.
6664 Undefined weak syms won't yet be marked as dynamic. */
6665 if (dyn && h->dynindx == -1 && !h->forced_local)
6667 if (!bfd_elf_link_record_dynamic_symbol (info, h))
6671 if (got_type == GOT_UNKNOWN)
6674 else if (got_type == GOT_NORMAL)
6676 h->got.offset = htab->root.sgot->size;
6677 htab->root.sgot->size += GOT_ENTRY_SIZE;
6678 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6679 || h->root.type != bfd_link_hash_undefweak)
6681 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6683 htab->root.srelgot->size += RELOC_SIZE (htab);
6689 if (got_type & GOT_TLSDESC_GD)
6691 eh->tlsdesc_got_jump_table_offset =
6692 (htab->root.sgotplt->size
6693 - aarch64_compute_jump_table_size (htab));
6694 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
6695 h->got.offset = (bfd_vma) - 2;
6698 if (got_type & GOT_TLS_GD)
6700 h->got.offset = htab->root.sgot->size;
6701 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
6704 if (got_type & GOT_TLS_IE)
6706 h->got.offset = htab->root.sgot->size;
6707 htab->root.sgot->size += GOT_ENTRY_SIZE;
6710 indx = h && h->dynindx != -1 ? h->dynindx : 0;
6711 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6712 || h->root.type != bfd_link_hash_undefweak)
6715 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6717 if (got_type & GOT_TLSDESC_GD)
6719 htab->root.srelplt->size += RELOC_SIZE (htab);
6720 /* Note reloc_count not incremented here! We have
6721 already adjusted reloc_count for this relocation
6724 /* TLSDESC PLT is now needed, but not yet determined. */
6725 htab->tlsdesc_plt = (bfd_vma) - 1;
6728 if (got_type & GOT_TLS_GD)
6729 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
6731 if (got_type & GOT_TLS_IE)
6732 htab->root.srelgot->size += RELOC_SIZE (htab);
6738 h->got.offset = (bfd_vma) - 1;
6741 if (eh->dyn_relocs == NULL)
6744 /* In the shared -Bsymbolic case, discard space allocated for
6745 dynamic pc-relative relocs against symbols which turn out to be
6746 defined in regular objects. For the normal shared case, discard
6747 space for pc-relative relocs that have become local due to symbol
6748 visibility changes. */
6752 /* Relocs that use pc_count are those that appear on a call
6753 insn, or certain REL relocs that can generated via assembly.
6754 We want calls to protected symbols to resolve directly to the
6755 function rather than going via the plt. If people want
6756 function pointer comparisons to work as expected then they
6757 should avoid writing weird assembly. */
6758 if (SYMBOL_CALLS_LOCAL (info, h))
6760 struct elf_dyn_relocs **pp;
6762 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
6764 p->count -= p->pc_count;
6773 /* Also discard relocs on undefined weak syms with non-default
6775 if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
6777 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6778 eh->dyn_relocs = NULL;
6780 /* Make sure undefined weak symbols are output as a dynamic
6782 else if (h->dynindx == -1
6784 && !bfd_elf_link_record_dynamic_symbol (info, h))
6789 else if (ELIMINATE_COPY_RELOCS)
6791 /* For the non-shared case, discard space for relocs against
6792 symbols which turn out to need copy relocs or are not
6798 || (htab->root.dynamic_sections_created
6799 && (h->root.type == bfd_link_hash_undefweak
6800 || h->root.type == bfd_link_hash_undefined))))
6802 /* Make sure this symbol is output as a dynamic symbol.
6803 Undefined weak syms won't yet be marked as dynamic. */
6804 if (h->dynindx == -1
6806 && !bfd_elf_link_record_dynamic_symbol (info, h))
6809 /* If that succeeded, we know we'll be keeping all the
6811 if (h->dynindx != -1)
6815 eh->dyn_relocs = NULL;
6820 /* Finally, allocate space. */
6821 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6825 sreloc = elf_section_data (p->sec)->sreloc;
6827 BFD_ASSERT (sreloc != NULL);
6829 sreloc->size += p->count * RELOC_SIZE (htab);
6835 /* Allocate space in .plt, .got and associated reloc sections for
6836 ifunc dynamic relocs. */
6839 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
6842 struct bfd_link_info *info;
6843 struct elf_aarch64_link_hash_table *htab;
6844 struct elf_aarch64_link_hash_entry *eh;
6846 /* An example of a bfd_link_hash_indirect symbol is versioned
6847 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
6848 -> __gxx_personality_v0(bfd_link_hash_defined)
6850 There is no need to process bfd_link_hash_indirect symbols here
6851 because we will also be presented with the concrete instance of
6852 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
6853 called to copy all relevant data from the generic to the concrete
6856 if (h->root.type == bfd_link_hash_indirect)
6859 if (h->root.type == bfd_link_hash_warning)
6860 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6862 info = (struct bfd_link_info *) inf;
6863 htab = elf_aarch64_hash_table (info);
6865 eh = (struct elf_aarch64_link_hash_entry *) h;
6867 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
6868 here if it is defined and referenced in a non-shared object. */
6869 if (h->type == STT_GNU_IFUNC
6871 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
6873 htab->plt_entry_size,
6874 htab->plt_header_size,
6879 /* Allocate space in .plt, .got and associated reloc sections for
6880 local dynamic relocs. */
6883 elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
6885 struct elf_link_hash_entry *h
6886 = (struct elf_link_hash_entry *) *slot;
6888 if (h->type != STT_GNU_IFUNC
6892 || h->root.type != bfd_link_hash_defined)
6895 return elfNN_aarch64_allocate_dynrelocs (h, inf);
6898 /* Allocate space in .plt, .got and associated reloc sections for
6899 local ifunc dynamic relocs. */
6902 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
6904 struct elf_link_hash_entry *h
6905 = (struct elf_link_hash_entry *) *slot;
6907 if (h->type != STT_GNU_IFUNC
6911 || h->root.type != bfd_link_hash_defined)
6914 return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
6917 /* This is the most important function of all . Innocuosly named
6920 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6921 struct bfd_link_info *info)
6923 struct elf_aarch64_link_hash_table *htab;
6929 htab = elf_aarch64_hash_table ((info));
6930 dynobj = htab->root.dynobj;
6932 BFD_ASSERT (dynobj != NULL);
6934 if (htab->root.dynamic_sections_created)
6936 if (info->executable)
6938 s = bfd_get_linker_section (dynobj, ".interp");
6941 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6942 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6946 /* Set up .got offsets for local syms, and space for local dynamic
6948 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
6950 struct elf_aarch64_local_symbol *locals = NULL;
6951 Elf_Internal_Shdr *symtab_hdr;
6955 if (!is_aarch64_elf (ibfd))
6958 for (s = ibfd->sections; s != NULL; s = s->next)
6960 struct elf_dyn_relocs *p;
6962 for (p = (struct elf_dyn_relocs *)
6963 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
6965 if (!bfd_is_abs_section (p->sec)
6966 && bfd_is_abs_section (p->sec->output_section))
6968 /* Input section has been discarded, either because
6969 it is a copy of a linkonce section or due to
6970 linker script /DISCARD/, so we'll be discarding
6973 else if (p->count != 0)
6975 srel = elf_section_data (p->sec)->sreloc;
6976 srel->size += p->count * RELOC_SIZE (htab);
6977 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
6978 info->flags |= DF_TEXTREL;
6983 locals = elf_aarch64_locals (ibfd);
6987 symtab_hdr = &elf_symtab_hdr (ibfd);
6988 srel = htab->root.srelgot;
6989 for (i = 0; i < symtab_hdr->sh_info; i++)
6991 locals[i].got_offset = (bfd_vma) - 1;
6992 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
6993 if (locals[i].got_refcount > 0)
6995 unsigned got_type = locals[i].got_type;
6996 if (got_type & GOT_TLSDESC_GD)
6998 locals[i].tlsdesc_got_jump_table_offset =
6999 (htab->root.sgotplt->size
7000 - aarch64_compute_jump_table_size (htab));
7001 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
7002 locals[i].got_offset = (bfd_vma) - 2;
7005 if (got_type & GOT_TLS_GD)
7007 locals[i].got_offset = htab->root.sgot->size;
7008 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
7011 if (got_type & GOT_TLS_IE)
7013 locals[i].got_offset = htab->root.sgot->size;
7014 htab->root.sgot->size += GOT_ENTRY_SIZE;
7017 if (got_type == GOT_UNKNOWN)
7021 if (got_type == GOT_NORMAL)
7027 if (got_type & GOT_TLSDESC_GD)
7029 htab->root.srelplt->size += RELOC_SIZE (htab);
7030 /* Note RELOC_COUNT not incremented here! */
7031 htab->tlsdesc_plt = (bfd_vma) - 1;
7034 if (got_type & GOT_TLS_GD)
7035 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
7037 if (got_type & GOT_TLS_IE)
7038 htab->root.srelgot->size += RELOC_SIZE (htab);
7043 locals[i].got_refcount = (bfd_vma) - 1;
7049 /* Allocate global sym .plt and .got entries, and space for global
7050 sym dynamic relocs. */
7051 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
7054 /* Allocate global ifunc sym .plt and .got entries, and space for global
7055 ifunc sym dynamic relocs. */
7056 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
7059 /* Allocate .plt and .got entries, and space for local symbols. */
7060 htab_traverse (htab->loc_hash_table,
7061 elfNN_aarch64_allocate_local_dynrelocs,
7064 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
7065 htab_traverse (htab->loc_hash_table,
7066 elfNN_aarch64_allocate_local_ifunc_dynrelocs,
7069 /* For every jump slot reserved in the sgotplt, reloc_count is
7070 incremented. However, when we reserve space for TLS descriptors,
7071 it's not incremented, so in order to compute the space reserved
7072 for them, it suffices to multiply the reloc count by the jump
7075 if (htab->root.srelplt)
7076 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
7078 if (htab->tlsdesc_plt)
7080 if (htab->root.splt->size == 0)
7081 htab->root.splt->size += PLT_ENTRY_SIZE;
7083 htab->tlsdesc_plt = htab->root.splt->size;
7084 htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
7086 /* If we're not using lazy TLS relocations, don't generate the
7087 GOT entry required. */
7088 if (!(info->flags & DF_BIND_NOW))
7090 htab->dt_tlsdesc_got = htab->root.sgot->size;
7091 htab->root.sgot->size += GOT_ENTRY_SIZE;
7095 /* Init mapping symbols information to use later to distingush between
7096 code and data while scanning for erratam 835769. */
7097 if (htab->fix_erratum_835769)
7098 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
7100 if (!is_aarch64_elf (ibfd))
7102 bfd_elfNN_aarch64_init_maps (ibfd);
7105 /* We now have determined the sizes of the various dynamic sections.
7106 Allocate memory for them. */
7108 for (s = dynobj->sections; s != NULL; s = s->next)
7110 if ((s->flags & SEC_LINKER_CREATED) == 0)
7113 if (s == htab->root.splt
7114 || s == htab->root.sgot
7115 || s == htab->root.sgotplt
7116 || s == htab->root.iplt
7117 || s == htab->root.igotplt || s == htab->sdynbss)
7119 /* Strip this section if we don't need it; see the
7122 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
7124 if (s->size != 0 && s != htab->root.srelplt)
7127 /* We use the reloc_count field as a counter if we need
7128 to copy relocs into the output file. */
7129 if (s != htab->root.srelplt)
7134 /* It's not one of our sections, so don't allocate space. */
7140 /* If we don't need this section, strip it from the
7141 output file. This is mostly to handle .rela.bss and
7142 .rela.plt. We must create both sections in
7143 create_dynamic_sections, because they must be created
7144 before the linker maps input sections to output
7145 sections. The linker does that before
7146 adjust_dynamic_symbol is called, and it is that
7147 function which decides whether anything needs to go
7148 into these sections. */
7150 s->flags |= SEC_EXCLUDE;
7154 if ((s->flags & SEC_HAS_CONTENTS) == 0)
7157 /* Allocate memory for the section contents. We use bfd_zalloc
7158 here in case unused entries are not reclaimed before the
7159 section's contents are written out. This should not happen,
7160 but this way if it does, we get a R_AARCH64_NONE reloc instead
7162 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
7163 if (s->contents == NULL)
7167 if (htab->root.dynamic_sections_created)
7169 /* Add some entries to the .dynamic section. We fill in the
7170 values later, in elfNN_aarch64_finish_dynamic_sections, but we
7171 must add the entries now so that we get the correct size for
7172 the .dynamic section. The DT_DEBUG entry is filled in by the
7173 dynamic linker and used by the debugger. */
7174 #define add_dynamic_entry(TAG, VAL) \
7175 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
7177 if (info->executable)
7179 if (!add_dynamic_entry (DT_DEBUG, 0))
7183 if (htab->root.splt->size != 0)
7185 if (!add_dynamic_entry (DT_PLTGOT, 0)
7186 || !add_dynamic_entry (DT_PLTRELSZ, 0)
7187 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
7188 || !add_dynamic_entry (DT_JMPREL, 0))
7191 if (htab->tlsdesc_plt
7192 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
7193 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
7199 if (!add_dynamic_entry (DT_RELA, 0)
7200 || !add_dynamic_entry (DT_RELASZ, 0)
7201 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
7204 /* If any dynamic relocs apply to a read-only section,
7205 then we need a DT_TEXTREL entry. */
7206 if ((info->flags & DF_TEXTREL) != 0)
7208 if (!add_dynamic_entry (DT_TEXTREL, 0))
7213 #undef add_dynamic_entry
7219 elf_aarch64_update_plt_entry (bfd *output_bfd,
7220 bfd_reloc_code_real_type r_type,
7221 bfd_byte *plt_entry, bfd_vma value)
7223 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
7225 _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
7229 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
7230 struct elf_aarch64_link_hash_table
7231 *htab, bfd *output_bfd,
7232 struct bfd_link_info *info)
7234 bfd_byte *plt_entry;
7237 bfd_vma gotplt_entry_address;
7238 bfd_vma plt_entry_address;
7239 Elf_Internal_Rela rela;
7241 asection *plt, *gotplt, *relplt;
7243 /* When building a static executable, use .iplt, .igot.plt and
7244 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7245 if (htab->root.splt != NULL)
7247 plt = htab->root.splt;
7248 gotplt = htab->root.sgotplt;
7249 relplt = htab->root.srelplt;
7253 plt = htab->root.iplt;
7254 gotplt = htab->root.igotplt;
7255 relplt = htab->root.irelplt;
7258 /* Get the index in the procedure linkage table which
7259 corresponds to this symbol. This is the index of this symbol
7260 in all the symbols for which we are making plt entries. The
7261 first entry in the procedure linkage table is reserved.
7263 Get the offset into the .got table of the entry that
7264 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
7265 bytes. The first three are reserved for the dynamic linker.
7267 For static executables, we don't reserve anything. */
7269 if (plt == htab->root.splt)
7271 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
7272 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
7276 plt_index = h->plt.offset / htab->plt_entry_size;
7277 got_offset = plt_index * GOT_ENTRY_SIZE;
7280 plt_entry = plt->contents + h->plt.offset;
7281 plt_entry_address = plt->output_section->vma
7282 + plt->output_offset + h->plt.offset;
7283 gotplt_entry_address = gotplt->output_section->vma +
7284 gotplt->output_offset + got_offset;
7286 /* Copy in the boiler-plate for the PLTn entry. */
7287 memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
7289 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
7290 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
7291 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7293 PG (gotplt_entry_address) -
7294 PG (plt_entry_address));
7296 /* Fill in the lo12 bits for the load from the pltgot. */
7297 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
7299 PG_OFFSET (gotplt_entry_address));
7301 /* Fill in the lo12 bits for the add from the pltgot entry. */
7302 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
7304 PG_OFFSET (gotplt_entry_address));
7306 /* All the GOTPLT Entries are essentially initialized to PLT0. */
7307 bfd_put_NN (output_bfd,
7308 plt->output_section->vma + plt->output_offset,
7309 gotplt->contents + got_offset);
7311 rela.r_offset = gotplt_entry_address;
7313 if (h->dynindx == -1
7314 || ((info->executable
7315 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7317 && h->type == STT_GNU_IFUNC))
7319 /* If an STT_GNU_IFUNC symbol is locally defined, generate
7320 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
7321 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
7322 rela.r_addend = (h->root.u.def.value
7323 + h->root.u.def.section->output_section->vma
7324 + h->root.u.def.section->output_offset);
7328 /* Fill in the entry in the .rela.plt section. */
7329 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
7333 /* Compute the relocation entry to used based on PLT index and do
7334 not adjust reloc_count. The reloc_count has already been adjusted
7335 to account for this entry. */
7336 loc = relplt->contents + plt_index * RELOC_SIZE (htab);
7337 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7340 /* Size sections even though they're not dynamic. We use it to setup
7341 _TLS_MODULE_BASE_, if needed. */
7344 elfNN_aarch64_always_size_sections (bfd *output_bfd,
7345 struct bfd_link_info *info)
7349 if (info->relocatable)
7352 tls_sec = elf_hash_table (info)->tls_sec;
7356 struct elf_link_hash_entry *tlsbase;
7358 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
7359 "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
7363 struct bfd_link_hash_entry *h = NULL;
7364 const struct elf_backend_data *bed =
7365 get_elf_backend_data (output_bfd);
7367 if (!(_bfd_generic_link_add_one_symbol
7368 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
7369 tls_sec, 0, NULL, FALSE, bed->collect, &h)))
7372 tlsbase->type = STT_TLS;
7373 tlsbase = (struct elf_link_hash_entry *) h;
7374 tlsbase->def_regular = 1;
7375 tlsbase->other = STV_HIDDEN;
7376 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
7383 /* Finish up dynamic symbol handling. We set the contents of various
7384 dynamic sections here. */
7386 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
7387 struct bfd_link_info *info,
7388 struct elf_link_hash_entry *h,
7389 Elf_Internal_Sym *sym)
7391 struct elf_aarch64_link_hash_table *htab;
7392 htab = elf_aarch64_hash_table (info);
7394 if (h->plt.offset != (bfd_vma) - 1)
7396 asection *plt, *gotplt, *relplt;
7398 /* This symbol has an entry in the procedure linkage table. Set
7401 /* When building a static executable, use .iplt, .igot.plt and
7402 .rela.iplt sections for STT_GNU_IFUNC symbols. */
7403 if (htab->root.splt != NULL)
7405 plt = htab->root.splt;
7406 gotplt = htab->root.sgotplt;
7407 relplt = htab->root.srelplt;
7411 plt = htab->root.iplt;
7412 gotplt = htab->root.igotplt;
7413 relplt = htab->root.irelplt;
7416 /* This symbol has an entry in the procedure linkage table. Set
7418 if ((h->dynindx == -1
7419 && !((h->forced_local || info->executable)
7421 && h->type == STT_GNU_IFUNC))
7427 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
7428 if (!h->def_regular)
7430 /* Mark the symbol as undefined, rather than as defined in
7431 the .plt section. Leave the value alone. This is a clue
7432 for the dynamic linker, to make function pointer
7433 comparisons work between an application and shared
7435 sym->st_shndx = SHN_UNDEF;
7439 if (h->got.offset != (bfd_vma) - 1
7440 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL)
7442 Elf_Internal_Rela rela;
7445 /* This symbol has an entry in the global offset table. Set it
7447 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
7450 rela.r_offset = (htab->root.sgot->output_section->vma
7451 + htab->root.sgot->output_offset
7452 + (h->got.offset & ~(bfd_vma) 1));
7455 && h->type == STT_GNU_IFUNC)
7459 /* Generate R_AARCH64_GLOB_DAT. */
7466 if (!h->pointer_equality_needed)
7469 /* For non-shared object, we can't use .got.plt, which
7470 contains the real function address if we need pointer
7471 equality. We load the GOT entry with the PLT entry. */
7472 plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
7473 bfd_put_NN (output_bfd, (plt->output_section->vma
7474 + plt->output_offset
7476 htab->root.sgot->contents
7477 + (h->got.offset & ~(bfd_vma) 1));
7481 else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
7483 if (!h->def_regular)
7486 BFD_ASSERT ((h->got.offset & 1) != 0);
7487 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
7488 rela.r_addend = (h->root.u.def.value
7489 + h->root.u.def.section->output_section->vma
7490 + h->root.u.def.section->output_offset);
7495 BFD_ASSERT ((h->got.offset & 1) == 0);
7496 bfd_put_NN (output_bfd, (bfd_vma) 0,
7497 htab->root.sgot->contents + h->got.offset);
7498 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
7502 loc = htab->root.srelgot->contents;
7503 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
7504 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7509 Elf_Internal_Rela rela;
7512 /* This symbol needs a copy reloc. Set it up. */
7514 if (h->dynindx == -1
7515 || (h->root.type != bfd_link_hash_defined
7516 && h->root.type != bfd_link_hash_defweak)
7517 || htab->srelbss == NULL)
7520 rela.r_offset = (h->root.u.def.value
7521 + h->root.u.def.section->output_section->vma
7522 + h->root.u.def.section->output_offset);
7523 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
7525 loc = htab->srelbss->contents;
7526 loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab);
7527 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
7530 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
7531 be NULL for local symbols. */
7533 && (h == elf_hash_table (info)->hdynamic
7534 || h == elf_hash_table (info)->hgot))
7535 sym->st_shndx = SHN_ABS;
7540 /* Finish up local dynamic symbol handling. We set the contents of
7541 various dynamic sections here. */
7544 elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
7546 struct elf_link_hash_entry *h
7547 = (struct elf_link_hash_entry *) *slot;
7548 struct bfd_link_info *info
7549 = (struct bfd_link_info *) inf;
7551 return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
7556 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
7557 struct elf_aarch64_link_hash_table
7560 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
7561 small and large plts and at the minute just generates
7564 /* PLT0 of the small PLT looks like this in ELF64 -
7565 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
7566 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
7567 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
7569 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
7570 // GOTPLT entry for this.
7572 PLT0 will be slightly different in ELF32 due to different got entry
7575 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
7579 memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
7581 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
7584 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
7585 + htab->root.sgotplt->output_offset
7586 + GOT_ENTRY_SIZE * 2);
7588 plt_base = htab->root.splt->output_section->vma +
7589 htab->root.splt->output_offset;
7591 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
7592 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
7593 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7594 htab->root.splt->contents + 4,
7595 PG (plt_got_2nd_ent) - PG (plt_base + 4));
7597 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
7598 htab->root.splt->contents + 8,
7599 PG_OFFSET (plt_got_2nd_ent));
7601 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
7602 htab->root.splt->contents + 12,
7603 PG_OFFSET (plt_got_2nd_ent));
7607 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
7608 struct bfd_link_info *info)
7610 struct elf_aarch64_link_hash_table *htab;
7614 htab = elf_aarch64_hash_table (info);
7615 dynobj = htab->root.dynobj;
7616 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
7618 if (htab->root.dynamic_sections_created)
7620 ElfNN_External_Dyn *dyncon, *dynconend;
7622 if (sdyn == NULL || htab->root.sgot == NULL)
7625 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
7626 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
7627 for (; dyncon < dynconend; dyncon++)
7629 Elf_Internal_Dyn dyn;
7632 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
7640 s = htab->root.sgotplt;
7641 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7645 dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma;
7649 s = htab->root.srelplt;
7650 dyn.d_un.d_val = s->size;
7654 /* The procedure linkage table relocs (DT_JMPREL) should
7655 not be included in the overall relocs (DT_RELA).
7656 Therefore, we override the DT_RELASZ entry here to
7657 make it not include the JMPREL relocs. Since the
7658 linker script arranges for .rela.plt to follow all
7659 other relocation sections, we don't have to worry
7660 about changing the DT_RELA entry. */
7661 if (htab->root.srelplt != NULL)
7663 s = htab->root.srelplt;
7664 dyn.d_un.d_val -= s->size;
7668 case DT_TLSDESC_PLT:
7669 s = htab->root.splt;
7670 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
7671 + htab->tlsdesc_plt;
7674 case DT_TLSDESC_GOT:
7675 s = htab->root.sgot;
7676 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
7677 + htab->dt_tlsdesc_got;
7681 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
7686 /* Fill in the special first entry in the procedure linkage table. */
7687 if (htab->root.splt && htab->root.splt->size > 0)
7689 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
7691 elf_section_data (htab->root.splt->output_section)->
7692 this_hdr.sh_entsize = htab->plt_entry_size;
7695 if (htab->tlsdesc_plt)
7697 bfd_put_NN (output_bfd, (bfd_vma) 0,
7698 htab->root.sgot->contents + htab->dt_tlsdesc_got);
7700 memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
7701 elfNN_aarch64_tlsdesc_small_plt_entry,
7702 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
7705 bfd_vma adrp1_addr =
7706 htab->root.splt->output_section->vma
7707 + htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
7709 bfd_vma adrp2_addr = adrp1_addr + 4;
7712 htab->root.sgot->output_section->vma
7713 + htab->root.sgot->output_offset;
7715 bfd_vma pltgot_addr =
7716 htab->root.sgotplt->output_section->vma
7717 + htab->root.sgotplt->output_offset;
7719 bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
7721 bfd_byte *plt_entry =
7722 htab->root.splt->contents + htab->tlsdesc_plt;
7724 /* adrp x2, DT_TLSDESC_GOT */
7725 elf_aarch64_update_plt_entry (output_bfd,
7726 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7728 (PG (dt_tlsdesc_got)
7729 - PG (adrp1_addr)));
7732 elf_aarch64_update_plt_entry (output_bfd,
7733 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7736 - PG (adrp2_addr)));
7738 /* ldr x2, [x2, #0] */
7739 elf_aarch64_update_plt_entry (output_bfd,
7740 BFD_RELOC_AARCH64_LDSTNN_LO12,
7742 PG_OFFSET (dt_tlsdesc_got));
7745 elf_aarch64_update_plt_entry (output_bfd,
7746 BFD_RELOC_AARCH64_ADD_LO12,
7748 PG_OFFSET (pltgot_addr));
7753 if (htab->root.sgotplt)
7755 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
7757 (*_bfd_error_handler)
7758 (_("discarded output section: `%A'"), htab->root.sgotplt);
7762 /* Fill in the first three entries in the global offset table. */
7763 if (htab->root.sgotplt->size > 0)
7765 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
7767 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
7768 bfd_put_NN (output_bfd,
7770 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
7771 bfd_put_NN (output_bfd,
7773 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
7776 if (htab->root.sgot)
7778 if (htab->root.sgot->size > 0)
7781 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
7782 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
7786 elf_section_data (htab->root.sgotplt->output_section)->
7787 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
7790 if (htab->root.sgot && htab->root.sgot->size > 0)
7791 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
7794 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
7795 htab_traverse (htab->loc_hash_table,
7796 elfNN_aarch64_finish_local_dynamic_symbol,
7802 /* Return address for Ith PLT stub in section PLT, for relocation REL
7803 or (bfd_vma) -1 if it should not be included. */
7806 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
7807 const arelent *rel ATTRIBUTE_UNUSED)
7809 return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
7813 /* We use this so we can override certain functions
7814 (though currently we don't). */
7816 const struct elf_size_info elfNN_aarch64_size_info =
7818 sizeof (ElfNN_External_Ehdr),
7819 sizeof (ElfNN_External_Phdr),
7820 sizeof (ElfNN_External_Shdr),
7821 sizeof (ElfNN_External_Rel),
7822 sizeof (ElfNN_External_Rela),
7823 sizeof (ElfNN_External_Sym),
7824 sizeof (ElfNN_External_Dyn),
7825 sizeof (Elf_External_Note),
7826 4, /* Hash table entry size. */
7827 1, /* Internal relocs per external relocs. */
7828 ARCH_SIZE, /* Arch size. */
7829 LOG_FILE_ALIGN, /* Log_file_align. */
7830 ELFCLASSNN, EV_CURRENT,
7831 bfd_elfNN_write_out_phdrs,
7832 bfd_elfNN_write_shdrs_and_ehdr,
7833 bfd_elfNN_checksum_contents,
7834 bfd_elfNN_write_relocs,
7835 bfd_elfNN_swap_symbol_in,
7836 bfd_elfNN_swap_symbol_out,
7837 bfd_elfNN_slurp_reloc_table,
7838 bfd_elfNN_slurp_symbol_table,
7839 bfd_elfNN_swap_dyn_in,
7840 bfd_elfNN_swap_dyn_out,
7841 bfd_elfNN_swap_reloc_in,
7842 bfd_elfNN_swap_reloc_out,
7843 bfd_elfNN_swap_reloca_in,
7844 bfd_elfNN_swap_reloca_out
7847 #define ELF_ARCH bfd_arch_aarch64
7848 #define ELF_MACHINE_CODE EM_AARCH64
7849 #define ELF_MAXPAGESIZE 0x10000
7850 #define ELF_MINPAGESIZE 0x1000
7851 #define ELF_COMMONPAGESIZE 0x1000
7853 #define bfd_elfNN_close_and_cleanup \
7854 elfNN_aarch64_close_and_cleanup
7856 #define bfd_elfNN_bfd_free_cached_info \
7857 elfNN_aarch64_bfd_free_cached_info
7859 #define bfd_elfNN_bfd_is_target_special_symbol \
7860 elfNN_aarch64_is_target_special_symbol
7862 #define bfd_elfNN_bfd_link_hash_table_create \
7863 elfNN_aarch64_link_hash_table_create
7865 #define bfd_elfNN_bfd_merge_private_bfd_data \
7866 elfNN_aarch64_merge_private_bfd_data
7868 #define bfd_elfNN_bfd_print_private_bfd_data \
7869 elfNN_aarch64_print_private_bfd_data
7871 #define bfd_elfNN_bfd_reloc_type_lookup \
7872 elfNN_aarch64_reloc_type_lookup
7874 #define bfd_elfNN_bfd_reloc_name_lookup \
7875 elfNN_aarch64_reloc_name_lookup
7877 #define bfd_elfNN_bfd_set_private_flags \
7878 elfNN_aarch64_set_private_flags
7880 #define bfd_elfNN_find_inliner_info \
7881 elfNN_aarch64_find_inliner_info
7883 #define bfd_elfNN_find_nearest_line \
7884 elfNN_aarch64_find_nearest_line
7886 #define bfd_elfNN_mkobject \
7887 elfNN_aarch64_mkobject
7889 #define bfd_elfNN_new_section_hook \
7890 elfNN_aarch64_new_section_hook
7892 #define elf_backend_adjust_dynamic_symbol \
7893 elfNN_aarch64_adjust_dynamic_symbol
7895 #define elf_backend_always_size_sections \
7896 elfNN_aarch64_always_size_sections
7898 #define elf_backend_check_relocs \
7899 elfNN_aarch64_check_relocs
7901 #define elf_backend_copy_indirect_symbol \
7902 elfNN_aarch64_copy_indirect_symbol
7904 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
7905 to them in our hash. */
7906 #define elf_backend_create_dynamic_sections \
7907 elfNN_aarch64_create_dynamic_sections
7909 #define elf_backend_init_index_section \
7910 _bfd_elf_init_2_index_sections
7912 #define elf_backend_finish_dynamic_sections \
7913 elfNN_aarch64_finish_dynamic_sections
7915 #define elf_backend_finish_dynamic_symbol \
7916 elfNN_aarch64_finish_dynamic_symbol
7918 #define elf_backend_gc_sweep_hook \
7919 elfNN_aarch64_gc_sweep_hook
7921 #define elf_backend_object_p \
7922 elfNN_aarch64_object_p
7924 #define elf_backend_output_arch_local_syms \
7925 elfNN_aarch64_output_arch_local_syms
7927 #define elf_backend_plt_sym_val \
7928 elfNN_aarch64_plt_sym_val
7930 #define elf_backend_post_process_headers \
7931 elfNN_aarch64_post_process_headers
7933 #define elf_backend_relocate_section \
7934 elfNN_aarch64_relocate_section
7936 #define elf_backend_reloc_type_class \
7937 elfNN_aarch64_reloc_type_class
7939 #define elf_backend_section_from_shdr \
7940 elfNN_aarch64_section_from_shdr
7942 #define elf_backend_size_dynamic_sections \
7943 elfNN_aarch64_size_dynamic_sections
7945 #define elf_backend_size_info \
7946 elfNN_aarch64_size_info
7948 #define elf_backend_write_section \
7949 elfNN_aarch64_write_section
7951 #define elf_backend_can_refcount 1
7952 #define elf_backend_can_gc_sections 1
7953 #define elf_backend_plt_readonly 1
7954 #define elf_backend_want_got_plt 1
7955 #define elf_backend_want_plt_sym 0
7956 #define elf_backend_may_use_rel_p 0
7957 #define elf_backend_may_use_rela_p 1
7958 #define elf_backend_default_use_rela_p 1
7959 #define elf_backend_rela_normal 1
7960 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
7961 #define elf_backend_default_execstack 0
7963 #undef elf_backend_obj_attrs_section
7964 #define elf_backend_obj_attrs_section ".ARM.attributes"
7966 #include "elfNN-target.h"
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