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 /* Section name for stubs is the associated section name plus this
1616 #define STUB_SUFFIX ".stub"
1618 enum elf_aarch64_stub_type
1621 aarch64_stub_adrp_branch,
1622 aarch64_stub_long_branch,
1625 struct elf_aarch64_stub_hash_entry
1627 /* Base hash table entry structure. */
1628 struct bfd_hash_entry root;
1630 /* The stub section. */
1633 /* Offset within stub_sec of the beginning of this stub. */
1634 bfd_vma stub_offset;
1636 /* Given the symbol's value and its section we can determine its final
1637 value when building the stubs (so the stub knows where to jump). */
1638 bfd_vma target_value;
1639 asection *target_section;
1641 enum elf_aarch64_stub_type stub_type;
1643 /* The symbol table entry, if any, that this was derived from. */
1644 struct elf_aarch64_link_hash_entry *h;
1646 /* Destination symbol type */
1647 unsigned char st_type;
1649 /* Where this stub is being called from, or, in the case of combined
1650 stub sections, the first input section in the group. */
1653 /* The name for the local symbol at the start of this stub. The
1654 stub name in the hash table has to be unique; this does not, so
1655 it can be friendlier. */
1659 /* Used to build a map of a section. This is required for mixed-endian
1662 typedef struct elf_elf_section_map
1667 elf_aarch64_section_map;
1670 typedef struct _aarch64_elf_section_data
1672 struct bfd_elf_section_data elf;
1673 unsigned int mapcount;
1674 unsigned int mapsize;
1675 elf_aarch64_section_map *map;
1677 _aarch64_elf_section_data;
1679 #define elf_aarch64_section_data(sec) \
1680 ((_aarch64_elf_section_data *) elf_section_data (sec))
1682 /* The size of the thread control block which is defined to be two pointers. */
1683 #define TCB_SIZE (ARCH_SIZE/8)*2
1685 struct elf_aarch64_local_symbol
1687 unsigned int got_type;
1688 bfd_signed_vma got_refcount;
1691 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
1692 offset is from the end of the jump table and reserved entries
1695 The magic value (bfd_vma) -1 indicates that an offset has not be
1697 bfd_vma tlsdesc_got_jump_table_offset;
1700 struct elf_aarch64_obj_tdata
1702 struct elf_obj_tdata root;
1704 /* local symbol descriptors */
1705 struct elf_aarch64_local_symbol *locals;
1707 /* Zero to warn when linking objects with incompatible enum sizes. */
1708 int no_enum_size_warning;
1710 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
1711 int no_wchar_size_warning;
1714 #define elf_aarch64_tdata(bfd) \
1715 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
1717 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
1719 #define is_aarch64_elf(bfd) \
1720 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1721 && elf_tdata (bfd) != NULL \
1722 && elf_object_id (bfd) == AARCH64_ELF_DATA)
1725 elfNN_aarch64_mkobject (bfd *abfd)
1727 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
1731 #define elf_aarch64_hash_entry(ent) \
1732 ((struct elf_aarch64_link_hash_entry *)(ent))
1734 #define GOT_UNKNOWN 0
1735 #define GOT_NORMAL 1
1736 #define GOT_TLS_GD 2
1737 #define GOT_TLS_IE 4
1738 #define GOT_TLSDESC_GD 8
1740 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
1742 /* AArch64 ELF linker hash entry. */
1743 struct elf_aarch64_link_hash_entry
1745 struct elf_link_hash_entry root;
1747 /* Track dynamic relocs copied for this symbol. */
1748 struct elf_dyn_relocs *dyn_relocs;
1750 /* Since PLT entries have variable size, we need to record the
1751 index into .got.plt instead of recomputing it from the PLT
1753 bfd_signed_vma plt_got_offset;
1755 /* Bit mask representing the type of GOT entry(s) if any required by
1757 unsigned int got_type;
1759 /* A pointer to the most recently used stub hash entry against this
1761 struct elf_aarch64_stub_hash_entry *stub_cache;
1763 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
1764 is from the end of the jump table and reserved entries within the PLTGOT.
1766 The magic value (bfd_vma) -1 indicates that an offset has not
1768 bfd_vma tlsdesc_got_jump_table_offset;
1772 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
1774 unsigned long r_symndx)
1777 return elf_aarch64_hash_entry (h)->got_type;
1779 if (! elf_aarch64_locals (abfd))
1782 return elf_aarch64_locals (abfd)[r_symndx].got_type;
1785 /* Get the AArch64 elf linker hash table from a link_info structure. */
1786 #define elf_aarch64_hash_table(info) \
1787 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
1789 #define aarch64_stub_hash_lookup(table, string, create, copy) \
1790 ((struct elf_aarch64_stub_hash_entry *) \
1791 bfd_hash_lookup ((table), (string), (create), (copy)))
1793 /* AArch64 ELF linker hash table. */
1794 struct elf_aarch64_link_hash_table
1796 /* The main hash table. */
1797 struct elf_link_hash_table root;
1799 /* Nonzero to force PIC branch veneers. */
1802 /* The number of bytes in the initial entry in the PLT. */
1803 bfd_size_type plt_header_size;
1805 /* The number of bytes in the subsequent PLT etries. */
1806 bfd_size_type plt_entry_size;
1808 /* Short-cuts to get to dynamic linker sections. */
1812 /* Small local sym cache. */
1813 struct sym_cache sym_cache;
1815 /* For convenience in allocate_dynrelocs. */
1818 /* The amount of space used by the reserved portion of the sgotplt
1819 section, plus whatever space is used by the jump slots. */
1820 bfd_vma sgotplt_jump_table_size;
1822 /* The stub hash table. */
1823 struct bfd_hash_table stub_hash_table;
1825 /* Linker stub bfd. */
1828 /* Linker call-backs. */
1829 asection *(*add_stub_section) (const char *, asection *);
1830 void (*layout_sections_again) (void);
1832 /* Array to keep track of which stub sections have been created, and
1833 information on stub grouping. */
1836 /* This is the section to which stubs in the group will be
1839 /* The stub section. */
1843 /* Assorted information used by elfNN_aarch64_size_stubs. */
1844 unsigned int bfd_count;
1846 asection **input_list;
1848 /* The offset into splt of the PLT entry for the TLS descriptor
1849 resolver. Special values are 0, if not necessary (or not found
1850 to be necessary yet), and -1 if needed but not determined
1852 bfd_vma tlsdesc_plt;
1854 /* The GOT offset for the lazy trampoline. Communicated to the
1855 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
1856 indicates an offset is not allocated. */
1857 bfd_vma dt_tlsdesc_got;
1859 /* Used by local STT_GNU_IFUNC symbols. */
1860 htab_t loc_hash_table;
1861 void * loc_hash_memory;
1864 /* Create an entry in an AArch64 ELF linker hash table. */
1866 static struct bfd_hash_entry *
1867 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
1868 struct bfd_hash_table *table,
1871 struct elf_aarch64_link_hash_entry *ret =
1872 (struct elf_aarch64_link_hash_entry *) entry;
1874 /* Allocate the structure if it has not already been allocated by a
1877 ret = bfd_hash_allocate (table,
1878 sizeof (struct elf_aarch64_link_hash_entry));
1880 return (struct bfd_hash_entry *) ret;
1882 /* Call the allocation method of the superclass. */
1883 ret = ((struct elf_aarch64_link_hash_entry *)
1884 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
1888 ret->dyn_relocs = NULL;
1889 ret->got_type = GOT_UNKNOWN;
1890 ret->plt_got_offset = (bfd_vma) - 1;
1891 ret->stub_cache = NULL;
1892 ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
1895 return (struct bfd_hash_entry *) ret;
1898 /* Initialize an entry in the stub hash table. */
1900 static struct bfd_hash_entry *
1901 stub_hash_newfunc (struct bfd_hash_entry *entry,
1902 struct bfd_hash_table *table, const char *string)
1904 /* Allocate the structure if it has not already been allocated by a
1908 entry = bfd_hash_allocate (table,
1910 elf_aarch64_stub_hash_entry));
1915 /* Call the allocation method of the superclass. */
1916 entry = bfd_hash_newfunc (entry, table, string);
1919 struct elf_aarch64_stub_hash_entry *eh;
1921 /* Initialize the local fields. */
1922 eh = (struct elf_aarch64_stub_hash_entry *) entry;
1923 eh->stub_sec = NULL;
1924 eh->stub_offset = 0;
1925 eh->target_value = 0;
1926 eh->target_section = NULL;
1927 eh->stub_type = aarch64_stub_none;
1935 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1936 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1937 as global symbol. We reuse indx and dynstr_index for local symbol
1938 hash since they aren't used by global symbols in this backend. */
1941 elfNN_aarch64_local_htab_hash (const void *ptr)
1943 struct elf_link_hash_entry *h
1944 = (struct elf_link_hash_entry *) ptr;
1945 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
1948 /* Compare local hash entries. */
1951 elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
1953 struct elf_link_hash_entry *h1
1954 = (struct elf_link_hash_entry *) ptr1;
1955 struct elf_link_hash_entry *h2
1956 = (struct elf_link_hash_entry *) ptr2;
1958 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
1961 /* Find and/or create a hash entry for local symbol. */
1963 static struct elf_link_hash_entry *
1964 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab,
1965 bfd *abfd, const Elf_Internal_Rela *rel,
1968 struct elf_aarch64_link_hash_entry e, *ret;
1969 asection *sec = abfd->sections;
1970 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
1971 ELFNN_R_SYM (rel->r_info));
1974 e.root.indx = sec->id;
1975 e.root.dynstr_index = ELFNN_R_SYM (rel->r_info);
1976 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
1977 create ? INSERT : NO_INSERT);
1984 ret = (struct elf_aarch64_link_hash_entry *) *slot;
1988 ret = (struct elf_aarch64_link_hash_entry *)
1989 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
1990 sizeof (struct elf_aarch64_link_hash_entry));
1993 memset (ret, 0, sizeof (*ret));
1994 ret->root.indx = sec->id;
1995 ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info);
1996 ret->root.dynindx = -1;
2002 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2005 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
2006 struct elf_link_hash_entry *dir,
2007 struct elf_link_hash_entry *ind)
2009 struct elf_aarch64_link_hash_entry *edir, *eind;
2011 edir = (struct elf_aarch64_link_hash_entry *) dir;
2012 eind = (struct elf_aarch64_link_hash_entry *) ind;
2014 if (eind->dyn_relocs != NULL)
2016 if (edir->dyn_relocs != NULL)
2018 struct elf_dyn_relocs **pp;
2019 struct elf_dyn_relocs *p;
2021 /* Add reloc counts against the indirect sym to the direct sym
2022 list. Merge any entries against the same section. */
2023 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2025 struct elf_dyn_relocs *q;
2027 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2028 if (q->sec == p->sec)
2030 q->pc_count += p->pc_count;
2031 q->count += p->count;
2038 *pp = edir->dyn_relocs;
2041 edir->dyn_relocs = eind->dyn_relocs;
2042 eind->dyn_relocs = NULL;
2045 if (ind->root.type == bfd_link_hash_indirect)
2047 /* Copy over PLT info. */
2048 if (dir->got.refcount <= 0)
2050 edir->got_type = eind->got_type;
2051 eind->got_type = GOT_UNKNOWN;
2055 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2058 /* Create an AArch64 elf linker hash table. */
2060 static struct bfd_link_hash_table *
2061 elfNN_aarch64_link_hash_table_create (bfd *abfd)
2063 struct elf_aarch64_link_hash_table *ret;
2064 bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
2066 ret = bfd_zmalloc (amt);
2070 if (!_bfd_elf_link_hash_table_init
2071 (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
2072 sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
2078 ret->plt_header_size = PLT_ENTRY_SIZE;
2079 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
2081 ret->dt_tlsdesc_got = (bfd_vma) - 1;
2083 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2084 sizeof (struct elf_aarch64_stub_hash_entry)))
2090 ret->loc_hash_table = htab_try_create (1024,
2091 elfNN_aarch64_local_htab_hash,
2092 elfNN_aarch64_local_htab_eq,
2094 ret->loc_hash_memory = objalloc_create ();
2095 if (!ret->loc_hash_table || !ret->loc_hash_memory)
2101 return &ret->root.root;
2104 /* Free the derived linker hash table. */
2107 elfNN_aarch64_hash_table_free (struct bfd_link_hash_table *hash)
2109 struct elf_aarch64_link_hash_table *ret
2110 = (struct elf_aarch64_link_hash_table *) hash;
2112 if (ret->loc_hash_table)
2113 htab_delete (ret->loc_hash_table);
2114 if (ret->loc_hash_memory)
2115 objalloc_free ((struct objalloc *) ret->loc_hash_memory);
2117 bfd_hash_table_free (&ret->stub_hash_table);
2118 _bfd_elf_link_hash_table_free (hash);
2122 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2123 bfd_vma offset, bfd_vma value)
2125 reloc_howto_type *howto;
2128 howto = elfNN_aarch64_howto_from_type (r_type);
2129 place = (input_section->output_section->vma + input_section->output_offset
2132 r_type = elfNN_aarch64_bfd_reloc_from_type (r_type);
2133 value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE);
2134 return _bfd_aarch64_elf_put_addend (input_bfd,
2135 input_section->contents + offset, r_type,
2139 static enum elf_aarch64_stub_type
2140 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2142 if (aarch64_valid_for_adrp_p (value, place))
2143 return aarch64_stub_adrp_branch;
2144 return aarch64_stub_long_branch;
2147 /* Determine the type of stub needed, if any, for a call. */
2149 static enum elf_aarch64_stub_type
2150 aarch64_type_of_stub (struct bfd_link_info *info,
2151 asection *input_sec,
2152 const Elf_Internal_Rela *rel,
2153 unsigned char st_type,
2154 struct elf_aarch64_link_hash_entry *hash,
2155 bfd_vma destination)
2158 bfd_signed_vma branch_offset;
2159 unsigned int r_type;
2160 struct elf_aarch64_link_hash_table *globals;
2161 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2162 bfd_boolean via_plt_p;
2164 if (st_type != STT_FUNC)
2167 globals = elf_aarch64_hash_table (info);
2168 via_plt_p = (globals->root.splt != NULL && hash != NULL
2169 && hash->root.plt.offset != (bfd_vma) - 1);
2174 /* Determine where the call point is. */
2175 location = (input_sec->output_offset
2176 + input_sec->output_section->vma + rel->r_offset);
2178 branch_offset = (bfd_signed_vma) (destination - location);
2180 r_type = ELFNN_R_TYPE (rel->r_info);
2182 /* We don't want to redirect any old unconditional jump in this way,
2183 only one which is being used for a sibcall, where it is
2184 acceptable for the IP0 and IP1 registers to be clobbered. */
2185 if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
2186 && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
2187 || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
2189 stub_type = aarch64_stub_long_branch;
2195 /* Build a name for an entry in the stub hash table. */
2198 elfNN_aarch64_stub_name (const asection *input_section,
2199 const asection *sym_sec,
2200 const struct elf_aarch64_link_hash_entry *hash,
2201 const Elf_Internal_Rela *rel)
2208 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
2209 stub_name = bfd_malloc (len);
2210 if (stub_name != NULL)
2211 snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
2212 (unsigned int) input_section->id,
2213 hash->root.root.root.string,
2218 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2219 stub_name = bfd_malloc (len);
2220 if (stub_name != NULL)
2221 snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
2222 (unsigned int) input_section->id,
2223 (unsigned int) sym_sec->id,
2224 (unsigned int) ELFNN_R_SYM (rel->r_info),
2231 /* Look up an entry in the stub hash. Stub entries are cached because
2232 creating the stub name takes a bit of time. */
2234 static struct elf_aarch64_stub_hash_entry *
2235 elfNN_aarch64_get_stub_entry (const asection *input_section,
2236 const asection *sym_sec,
2237 struct elf_link_hash_entry *hash,
2238 const Elf_Internal_Rela *rel,
2239 struct elf_aarch64_link_hash_table *htab)
2241 struct elf_aarch64_stub_hash_entry *stub_entry;
2242 struct elf_aarch64_link_hash_entry *h =
2243 (struct elf_aarch64_link_hash_entry *) hash;
2244 const asection *id_sec;
2246 if ((input_section->flags & SEC_CODE) == 0)
2249 /* If this input section is part of a group of sections sharing one
2250 stub section, then use the id of the first section in the group.
2251 Stub names need to include a section id, as there may well be
2252 more than one stub used to reach say, printf, and we need to
2253 distinguish between them. */
2254 id_sec = htab->stub_group[input_section->id].link_sec;
2256 if (h != NULL && h->stub_cache != NULL
2257 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
2259 stub_entry = h->stub_cache;
2265 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
2266 if (stub_name == NULL)
2269 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
2270 stub_name, FALSE, FALSE);
2272 h->stub_cache = stub_entry;
2280 /* Add a new stub entry to the stub hash. Not all fields of the new
2281 stub entry are initialised. */
2283 static struct elf_aarch64_stub_hash_entry *
2284 elfNN_aarch64_add_stub (const char *stub_name,
2286 struct elf_aarch64_link_hash_table *htab)
2290 struct elf_aarch64_stub_hash_entry *stub_entry;
2292 link_sec = htab->stub_group[section->id].link_sec;
2293 stub_sec = htab->stub_group[section->id].stub_sec;
2294 if (stub_sec == NULL)
2296 stub_sec = htab->stub_group[link_sec->id].stub_sec;
2297 if (stub_sec == NULL)
2303 namelen = strlen (link_sec->name);
2304 len = namelen + sizeof (STUB_SUFFIX);
2305 s_name = bfd_alloc (htab->stub_bfd, len);
2309 memcpy (s_name, link_sec->name, namelen);
2310 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2311 stub_sec = (*htab->add_stub_section) (s_name, link_sec);
2312 if (stub_sec == NULL)
2314 htab->stub_group[link_sec->id].stub_sec = stub_sec;
2316 htab->stub_group[section->id].stub_sec = stub_sec;
2319 /* Enter this entry into the linker stub hash table. */
2320 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2322 if (stub_entry == NULL)
2324 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2325 section->owner, stub_name);
2329 stub_entry->stub_sec = stub_sec;
2330 stub_entry->stub_offset = 0;
2331 stub_entry->id_sec = link_sec;
2337 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
2338 void *in_arg ATTRIBUTE_UNUSED)
2340 struct elf_aarch64_stub_hash_entry *stub_entry;
2345 unsigned int template_size;
2346 const uint32_t *template;
2349 /* Massage our args to the form they really have. */
2350 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2352 stub_sec = stub_entry->stub_sec;
2354 /* Make a note of the offset within the stubs for this entry. */
2355 stub_entry->stub_offset = stub_sec->size;
2356 loc = stub_sec->contents + stub_entry->stub_offset;
2358 stub_bfd = stub_sec->owner;
2360 /* This is the address of the stub destination. */
2361 sym_value = (stub_entry->target_value
2362 + stub_entry->target_section->output_offset
2363 + stub_entry->target_section->output_section->vma);
2365 if (stub_entry->stub_type == aarch64_stub_long_branch)
2367 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
2368 + stub_sec->output_offset);
2370 /* See if we can relax the stub. */
2371 if (aarch64_valid_for_adrp_p (sym_value, place))
2372 stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
2375 switch (stub_entry->stub_type)
2377 case aarch64_stub_adrp_branch:
2378 template = aarch64_adrp_branch_stub;
2379 template_size = sizeof (aarch64_adrp_branch_stub);
2381 case aarch64_stub_long_branch:
2382 template = aarch64_long_branch_stub;
2383 template_size = sizeof (aarch64_long_branch_stub);
2390 for (i = 0; i < (template_size / sizeof template[0]); i++)
2392 bfd_putl32 (template[i], loc);
2396 template_size = (template_size + 7) & ~7;
2397 stub_sec->size += template_size;
2399 switch (stub_entry->stub_type)
2401 case aarch64_stub_adrp_branch:
2402 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
2403 stub_entry->stub_offset, sym_value))
2404 /* The stub would not have been relaxed if the offset was out
2408 _bfd_final_link_relocate
2409 (elfNN_aarch64_howto_from_type (AARCH64_R (ADD_ABS_LO12_NC)),
2413 stub_entry->stub_offset + 4,
2418 case aarch64_stub_long_branch:
2419 /* We want the value relative to the address 12 bytes back from the
2421 _bfd_final_link_relocate (elfNN_aarch64_howto_from_type
2422 (AARCH64_R (PRELNN)), stub_bfd, stub_sec,
2424 stub_entry->stub_offset + 16,
2434 /* As above, but don't actually build the stub. Just bump offset so
2435 we know stub section sizes. */
2438 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
2439 void *in_arg ATTRIBUTE_UNUSED)
2441 struct elf_aarch64_stub_hash_entry *stub_entry;
2444 /* Massage our args to the form they really have. */
2445 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2447 switch (stub_entry->stub_type)
2449 case aarch64_stub_adrp_branch:
2450 size = sizeof (aarch64_adrp_branch_stub);
2452 case aarch64_stub_long_branch:
2453 size = sizeof (aarch64_long_branch_stub);
2461 size = (size + 7) & ~7;
2462 stub_entry->stub_sec->size += size;
2466 /* External entry points for sizing and building linker stubs. */
2468 /* Set up various things so that we can make a list of input sections
2469 for each output section included in the link. Returns -1 on error,
2470 0 when no stubs will be needed, and 1 on success. */
2473 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
2474 struct bfd_link_info *info)
2477 unsigned int bfd_count;
2478 int top_id, top_index;
2480 asection **input_list, **list;
2482 struct elf_aarch64_link_hash_table *htab =
2483 elf_aarch64_hash_table (info);
2485 if (!is_elf_hash_table (htab))
2488 /* Count the number of input BFDs and find the top input section id. */
2489 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
2490 input_bfd != NULL; input_bfd = input_bfd->link_next)
2493 for (section = input_bfd->sections;
2494 section != NULL; section = section->next)
2496 if (top_id < section->id)
2497 top_id = section->id;
2500 htab->bfd_count = bfd_count;
2502 amt = sizeof (struct map_stub) * (top_id + 1);
2503 htab->stub_group = bfd_zmalloc (amt);
2504 if (htab->stub_group == NULL)
2507 /* We can't use output_bfd->section_count here to find the top output
2508 section index as some sections may have been removed, and
2509 _bfd_strip_section_from_output doesn't renumber the indices. */
2510 for (section = output_bfd->sections, top_index = 0;
2511 section != NULL; section = section->next)
2513 if (top_index < section->index)
2514 top_index = section->index;
2517 htab->top_index = top_index;
2518 amt = sizeof (asection *) * (top_index + 1);
2519 input_list = bfd_malloc (amt);
2520 htab->input_list = input_list;
2521 if (input_list == NULL)
2524 /* For sections we aren't interested in, mark their entries with a
2525 value we can check later. */
2526 list = input_list + top_index;
2528 *list = bfd_abs_section_ptr;
2529 while (list-- != input_list);
2531 for (section = output_bfd->sections;
2532 section != NULL; section = section->next)
2534 if ((section->flags & SEC_CODE) != 0)
2535 input_list[section->index] = NULL;
2541 /* Used by elfNN_aarch64_next_input_section and group_sections. */
2542 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
2544 /* The linker repeatedly calls this function for each input section,
2545 in the order that input sections are linked into output sections.
2546 Build lists of input sections to determine groupings between which
2547 we may insert linker stubs. */
2550 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
2552 struct elf_aarch64_link_hash_table *htab =
2553 elf_aarch64_hash_table (info);
2555 if (isec->output_section->index <= htab->top_index)
2557 asection **list = htab->input_list + isec->output_section->index;
2559 if (*list != bfd_abs_section_ptr)
2561 /* Steal the link_sec pointer for our list. */
2562 /* This happens to make the list in reverse order,
2563 which is what we want. */
2564 PREV_SEC (isec) = *list;
2570 /* See whether we can group stub sections together. Grouping stub
2571 sections may result in fewer stubs. More importantly, we need to
2572 put all .init* and .fini* stubs at the beginning of the .init or
2573 .fini output sections respectively, because glibc splits the
2574 _init and _fini functions into multiple parts. Putting a stub in
2575 the middle of a function is not a good idea. */
2578 group_sections (struct elf_aarch64_link_hash_table *htab,
2579 bfd_size_type stub_group_size,
2580 bfd_boolean stubs_always_before_branch)
2582 asection **list = htab->input_list + htab->top_index;
2586 asection *tail = *list;
2588 if (tail == bfd_abs_section_ptr)
2591 while (tail != NULL)
2595 bfd_size_type total;
2599 while ((prev = PREV_SEC (curr)) != NULL
2600 && ((total += curr->output_offset - prev->output_offset)
2604 /* OK, the size from the start of CURR to the end is less
2605 than stub_group_size and thus can be handled by one stub
2606 section. (Or the tail section is itself larger than
2607 stub_group_size, in which case we may be toast.)
2608 We should really be keeping track of the total size of
2609 stubs added here, as stubs contribute to the final output
2613 prev = PREV_SEC (tail);
2614 /* Set up this stub group. */
2615 htab->stub_group[tail->id].link_sec = curr;
2617 while (tail != curr && (tail = prev) != NULL);
2619 /* But wait, there's more! Input sections up to stub_group_size
2620 bytes before the stub section can be handled by it too. */
2621 if (!stubs_always_before_branch)
2625 && ((total += tail->output_offset - prev->output_offset)
2629 prev = PREV_SEC (tail);
2630 htab->stub_group[tail->id].link_sec = curr;
2636 while (list-- != htab->input_list);
2638 free (htab->input_list);
2643 /* Determine and set the size of the stub section for a final link.
2645 The basic idea here is to examine all the relocations looking for
2646 PC-relative calls to a target that is unreachable with a "bl"
2650 elfNN_aarch64_size_stubs (bfd *output_bfd,
2652 struct bfd_link_info *info,
2653 bfd_signed_vma group_size,
2654 asection * (*add_stub_section) (const char *,
2656 void (*layout_sections_again) (void))
2658 bfd_size_type stub_group_size;
2659 bfd_boolean stubs_always_before_branch;
2660 bfd_boolean stub_changed = 0;
2661 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
2663 /* Propagate mach to stub bfd, because it may not have been
2664 finalized when we created stub_bfd. */
2665 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
2666 bfd_get_mach (output_bfd));
2668 /* Stash our params away. */
2669 htab->stub_bfd = stub_bfd;
2670 htab->add_stub_section = add_stub_section;
2671 htab->layout_sections_again = layout_sections_again;
2672 stubs_always_before_branch = group_size < 0;
2674 stub_group_size = -group_size;
2676 stub_group_size = group_size;
2678 if (stub_group_size == 1)
2680 /* Default values. */
2681 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
2682 stub_group_size = 127 * 1024 * 1024;
2685 group_sections (htab, stub_group_size, stubs_always_before_branch);
2690 unsigned int bfd_indx;
2693 for (input_bfd = info->input_bfds, bfd_indx = 0;
2694 input_bfd != NULL; input_bfd = input_bfd->link_next, bfd_indx++)
2696 Elf_Internal_Shdr *symtab_hdr;
2698 Elf_Internal_Sym *local_syms = NULL;
2700 /* We'll need the symbol table in a second. */
2701 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2702 if (symtab_hdr->sh_info == 0)
2705 /* Walk over each section attached to the input bfd. */
2706 for (section = input_bfd->sections;
2707 section != NULL; section = section->next)
2709 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
2711 /* If there aren't any relocs, then there's nothing more
2713 if ((section->flags & SEC_RELOC) == 0
2714 || section->reloc_count == 0
2715 || (section->flags & SEC_CODE) == 0)
2718 /* If this section is a link-once section that will be
2719 discarded, then don't create any stubs. */
2720 if (section->output_section == NULL
2721 || section->output_section->owner != output_bfd)
2724 /* Get the relocs. */
2726 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
2727 NULL, info->keep_memory);
2728 if (internal_relocs == NULL)
2729 goto error_ret_free_local;
2731 /* Now examine each relocation. */
2732 irela = internal_relocs;
2733 irelaend = irela + section->reloc_count;
2734 for (; irela < irelaend; irela++)
2736 unsigned int r_type, r_indx;
2737 enum elf_aarch64_stub_type stub_type;
2738 struct elf_aarch64_stub_hash_entry *stub_entry;
2741 bfd_vma destination;
2742 struct elf_aarch64_link_hash_entry *hash;
2743 const char *sym_name;
2745 const asection *id_sec;
2746 unsigned char st_type;
2749 r_type = ELFNN_R_TYPE (irela->r_info);
2750 r_indx = ELFNN_R_SYM (irela->r_info);
2752 if (r_type >= (unsigned int) R_AARCH64_end)
2754 bfd_set_error (bfd_error_bad_value);
2755 error_ret_free_internal:
2756 if (elf_section_data (section)->relocs == NULL)
2757 free (internal_relocs);
2758 goto error_ret_free_local;
2761 /* Only look for stubs on unconditional branch and
2762 branch and link instructions. */
2763 if (r_type != (unsigned int) AARCH64_R (CALL26)
2764 && r_type != (unsigned int) AARCH64_R (JUMP26))
2767 /* Now determine the call target, its name, value,
2774 if (r_indx < symtab_hdr->sh_info)
2776 /* It's a local symbol. */
2777 Elf_Internal_Sym *sym;
2778 Elf_Internal_Shdr *hdr;
2780 if (local_syms == NULL)
2783 = (Elf_Internal_Sym *) symtab_hdr->contents;
2784 if (local_syms == NULL)
2786 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
2787 symtab_hdr->sh_info, 0,
2789 if (local_syms == NULL)
2790 goto error_ret_free_internal;
2793 sym = local_syms + r_indx;
2794 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
2795 sym_sec = hdr->bfd_section;
2797 /* This is an undefined symbol. It can never
2801 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2802 sym_value = sym->st_value;
2803 destination = (sym_value + irela->r_addend
2804 + sym_sec->output_offset
2805 + sym_sec->output_section->vma);
2806 st_type = ELF_ST_TYPE (sym->st_info);
2808 = bfd_elf_string_from_elf_section (input_bfd,
2809 symtab_hdr->sh_link,
2816 e_indx = r_indx - symtab_hdr->sh_info;
2817 hash = ((struct elf_aarch64_link_hash_entry *)
2818 elf_sym_hashes (input_bfd)[e_indx]);
2820 while (hash->root.root.type == bfd_link_hash_indirect
2821 || hash->root.root.type == bfd_link_hash_warning)
2822 hash = ((struct elf_aarch64_link_hash_entry *)
2823 hash->root.root.u.i.link);
2825 if (hash->root.root.type == bfd_link_hash_defined
2826 || hash->root.root.type == bfd_link_hash_defweak)
2828 struct elf_aarch64_link_hash_table *globals =
2829 elf_aarch64_hash_table (info);
2830 sym_sec = hash->root.root.u.def.section;
2831 sym_value = hash->root.root.u.def.value;
2832 /* For a destination in a shared library,
2833 use the PLT stub as target address to
2834 decide whether a branch stub is
2836 if (globals->root.splt != NULL && hash != NULL
2837 && hash->root.plt.offset != (bfd_vma) - 1)
2839 sym_sec = globals->root.splt;
2840 sym_value = hash->root.plt.offset;
2841 if (sym_sec->output_section != NULL)
2842 destination = (sym_value
2843 + sym_sec->output_offset
2845 sym_sec->output_section->vma);
2847 else if (sym_sec->output_section != NULL)
2848 destination = (sym_value + irela->r_addend
2849 + sym_sec->output_offset
2850 + sym_sec->output_section->vma);
2852 else if (hash->root.root.type == bfd_link_hash_undefined
2853 || (hash->root.root.type
2854 == bfd_link_hash_undefweak))
2856 /* For a shared library, use the PLT stub as
2857 target address to decide whether a long
2858 branch stub is needed.
2859 For absolute code, they cannot be handled. */
2860 struct elf_aarch64_link_hash_table *globals =
2861 elf_aarch64_hash_table (info);
2863 if (globals->root.splt != NULL && hash != NULL
2864 && hash->root.plt.offset != (bfd_vma) - 1)
2866 sym_sec = globals->root.splt;
2867 sym_value = hash->root.plt.offset;
2868 if (sym_sec->output_section != NULL)
2869 destination = (sym_value
2870 + sym_sec->output_offset
2872 sym_sec->output_section->vma);
2879 bfd_set_error (bfd_error_bad_value);
2880 goto error_ret_free_internal;
2882 st_type = ELF_ST_TYPE (hash->root.type);
2883 sym_name = hash->root.root.root.string;
2886 /* Determine what (if any) linker stub is needed. */
2887 stub_type = aarch64_type_of_stub
2888 (info, section, irela, st_type, hash, destination);
2889 if (stub_type == aarch64_stub_none)
2892 /* Support for grouping stub sections. */
2893 id_sec = htab->stub_group[section->id].link_sec;
2895 /* Get the name of this stub. */
2896 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
2899 goto error_ret_free_internal;
2902 aarch64_stub_hash_lookup (&htab->stub_hash_table,
2903 stub_name, FALSE, FALSE);
2904 if (stub_entry != NULL)
2906 /* The proper stub has already been created. */
2911 stub_entry = elfNN_aarch64_add_stub (stub_name, section,
2913 if (stub_entry == NULL)
2916 goto error_ret_free_internal;
2919 stub_entry->target_value = sym_value;
2920 stub_entry->target_section = sym_sec;
2921 stub_entry->stub_type = stub_type;
2922 stub_entry->h = hash;
2923 stub_entry->st_type = st_type;
2925 if (sym_name == NULL)
2926 sym_name = "unnamed";
2927 len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
2928 stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
2929 if (stub_entry->output_name == NULL)
2932 goto error_ret_free_internal;
2935 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
2938 stub_changed = TRUE;
2941 /* We're done with the internal relocs, free them. */
2942 if (elf_section_data (section)->relocs == NULL)
2943 free (internal_relocs);
2950 /* OK, we've added some stubs. Find out the new size of the
2952 for (stub_sec = htab->stub_bfd->sections;
2953 stub_sec != NULL; stub_sec = stub_sec->next)
2956 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
2958 /* Ask the linker to do its stuff. */
2959 (*htab->layout_sections_again) ();
2960 stub_changed = FALSE;
2965 error_ret_free_local:
2969 /* Build all the stubs associated with the current output file. The
2970 stubs are kept in a hash table attached to the main linker hash
2971 table. We also set up the .plt entries for statically linked PIC
2972 functions here. This function is called via aarch64_elf_finish in the
2976 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
2979 struct bfd_hash_table *table;
2980 struct elf_aarch64_link_hash_table *htab;
2982 htab = elf_aarch64_hash_table (info);
2984 for (stub_sec = htab->stub_bfd->sections;
2985 stub_sec != NULL; stub_sec = stub_sec->next)
2989 /* Ignore non-stub sections. */
2990 if (!strstr (stub_sec->name, STUB_SUFFIX))
2993 /* Allocate memory to hold the linker stubs. */
2994 size = stub_sec->size;
2995 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
2996 if (stub_sec->contents == NULL && size != 0)
3001 /* Build the stubs as directed by the stub hash table. */
3002 table = &htab->stub_hash_table;
3003 bfd_hash_traverse (table, aarch64_build_one_stub, info);
3009 /* Add an entry to the code/data map for section SEC. */
3012 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
3014 struct _aarch64_elf_section_data *sec_data =
3015 elf_aarch64_section_data (sec);
3016 unsigned int newidx;
3018 if (sec_data->map == NULL)
3020 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
3021 sec_data->mapcount = 0;
3022 sec_data->mapsize = 1;
3025 newidx = sec_data->mapcount++;
3027 if (sec_data->mapcount > sec_data->mapsize)
3029 sec_data->mapsize *= 2;
3030 sec_data->map = bfd_realloc_or_free
3031 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
3036 sec_data->map[newidx].vma = vma;
3037 sec_data->map[newidx].type = type;
3042 /* Initialise maps of insn/data for input BFDs. */
3044 bfd_elfNN_aarch64_init_maps (bfd *abfd)
3046 Elf_Internal_Sym *isymbuf;
3047 Elf_Internal_Shdr *hdr;
3048 unsigned int i, localsyms;
3050 /* Make sure that we are dealing with an AArch64 elf binary. */
3051 if (!is_aarch64_elf (abfd))
3054 if ((abfd->flags & DYNAMIC) != 0)
3057 hdr = &elf_symtab_hdr (abfd);
3058 localsyms = hdr->sh_info;
3060 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
3061 should contain the number of local symbols, which should come before any
3062 global symbols. Mapping symbols are always local. */
3063 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
3065 /* No internal symbols read? Skip this BFD. */
3066 if (isymbuf == NULL)
3069 for (i = 0; i < localsyms; i++)
3071 Elf_Internal_Sym *isym = &isymbuf[i];
3072 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
3075 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
3077 name = bfd_elf_string_from_elf_section (abfd,
3081 if (bfd_is_aarch64_special_symbol_name
3082 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
3083 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
3088 /* Set option values needed during linking. */
3090 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
3091 struct bfd_link_info *link_info,
3093 int no_wchar_warn, int pic_veneer)
3095 struct elf_aarch64_link_hash_table *globals;
3097 globals = elf_aarch64_hash_table (link_info);
3098 globals->pic_veneer = pic_veneer;
3100 BFD_ASSERT (is_aarch64_elf (output_bfd));
3101 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
3102 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
3106 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
3107 struct elf_aarch64_link_hash_table
3108 *globals, struct bfd_link_info *info,
3109 bfd_vma value, bfd *output_bfd,
3110 bfd_boolean *unresolved_reloc_p)
3112 bfd_vma off = (bfd_vma) - 1;
3113 asection *basegot = globals->root.sgot;
3114 bfd_boolean dyn = globals->root.dynamic_sections_created;
3118 BFD_ASSERT (basegot != NULL);
3119 off = h->got.offset;
3120 BFD_ASSERT (off != (bfd_vma) - 1);
3121 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3123 && SYMBOL_REFERENCES_LOCAL (info, h))
3124 || (ELF_ST_VISIBILITY (h->other)
3125 && h->root.type == bfd_link_hash_undefweak))
3127 /* This is actually a static link, or it is a -Bsymbolic link
3128 and the symbol is defined locally. We must initialize this
3129 entry in the global offset table. Since the offset must
3130 always be a multiple of 8 (4 in the case of ILP32), we use
3131 the least significant bit to record whether we have
3132 initialized it already.
3133 When doing a dynamic link, we create a .rel(a).got relocation
3134 entry to initialize the value. This is done in the
3135 finish_dynamic_symbol routine. */
3140 bfd_put_NN (output_bfd, value, basegot->contents + off);
3145 *unresolved_reloc_p = FALSE;
3147 off = off + basegot->output_section->vma + basegot->output_offset;
3153 /* Change R_TYPE to a more efficient access model where possible,
3154 return the new reloc type. */
3156 static bfd_reloc_code_real_type
3157 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
3158 struct elf_link_hash_entry *h)
3160 bfd_boolean is_local = h == NULL;
3164 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3165 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3167 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
3168 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
3170 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3171 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
3173 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
3174 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
3176 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3177 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
3179 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
3180 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
3182 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3183 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3184 /* Instructions with these relocations will become NOPs. */
3185 return BFD_RELOC_AARCH64_NONE;
3195 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
3199 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
3200 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
3201 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
3202 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
3205 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3206 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3209 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3210 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3211 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3212 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
3213 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
3214 return GOT_TLSDESC_GD;
3216 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3217 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
3218 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
3221 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
3222 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
3223 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
3224 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
3225 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
3226 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
3227 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
3228 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
3238 aarch64_can_relax_tls (bfd *input_bfd,
3239 struct bfd_link_info *info,
3240 bfd_reloc_code_real_type r_type,
3241 struct elf_link_hash_entry *h,
3242 unsigned long r_symndx)
3244 unsigned int symbol_got_type;
3245 unsigned int reloc_got_type;
3247 if (! IS_AARCH64_TLS_RELOC (r_type))
3250 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
3251 reloc_got_type = aarch64_reloc_got_type (r_type);
3253 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
3259 if (h && h->root.type == bfd_link_hash_undefweak)
3265 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
3268 static bfd_reloc_code_real_type
3269 aarch64_tls_transition (bfd *input_bfd,
3270 struct bfd_link_info *info,
3271 unsigned int r_type,
3272 struct elf_link_hash_entry *h,
3273 unsigned long r_symndx)
3275 bfd_reloc_code_real_type bfd_r_type
3276 = elfNN_aarch64_bfd_reloc_from_type (r_type);
3278 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
3281 return aarch64_tls_transition_without_check (bfd_r_type, h);
3284 /* Return the base VMA address which should be subtracted from real addresses
3285 when resolving R_AARCH64_TLS_DTPREL relocation. */
3288 dtpoff_base (struct bfd_link_info *info)
3290 /* If tls_sec is NULL, we should have signalled an error already. */
3291 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
3292 return elf_hash_table (info)->tls_sec->vma;
3295 /* Return the base VMA address which should be subtracted from real addresses
3296 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
3299 tpoff_base (struct bfd_link_info *info)
3301 struct elf_link_hash_table *htab = elf_hash_table (info);
3303 /* If tls_sec is NULL, we should have signalled an error already. */
3304 BFD_ASSERT (htab->tls_sec != NULL);
3306 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
3307 htab->tls_sec->alignment_power);
3308 return htab->tls_sec->vma - base;
3312 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3313 unsigned long r_symndx)
3315 /* Calculate the address of the GOT entry for symbol
3316 referred to in h. */
3318 return &h->got.offset;
3322 struct elf_aarch64_local_symbol *l;
3324 l = elf_aarch64_locals (input_bfd);
3325 return &l[r_symndx].got_offset;
3330 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3331 unsigned long r_symndx)
3334 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
3339 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
3340 unsigned long r_symndx)
3343 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3348 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3349 unsigned long r_symndx)
3352 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
3358 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
3359 unsigned long r_symndx)
3361 /* Calculate the address of the GOT entry for symbol
3362 referred to in h. */
3365 struct elf_aarch64_link_hash_entry *eh;
3366 eh = (struct elf_aarch64_link_hash_entry *) h;
3367 return &eh->tlsdesc_got_jump_table_offset;
3372 struct elf_aarch64_local_symbol *l;
3374 l = elf_aarch64_locals (input_bfd);
3375 return &l[r_symndx].tlsdesc_got_jump_table_offset;
3380 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
3381 unsigned long r_symndx)
3384 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3389 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
3390 struct elf_link_hash_entry *h,
3391 unsigned long r_symndx)
3394 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3399 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
3400 unsigned long r_symndx)
3403 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
3408 /* Perform a relocation as part of a final link. */
3409 static bfd_reloc_status_type
3410 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
3413 asection *input_section,
3415 Elf_Internal_Rela *rel,
3417 struct bfd_link_info *info,
3419 struct elf_link_hash_entry *h,
3420 bfd_boolean *unresolved_reloc_p,
3421 bfd_boolean save_addend,
3422 bfd_vma *saved_addend,
3423 Elf_Internal_Sym *sym)
3425 Elf_Internal_Shdr *symtab_hdr;
3426 unsigned int r_type = howto->type;
3427 bfd_reloc_code_real_type bfd_r_type
3428 = elfNN_aarch64_bfd_reloc_from_howto (howto);
3429 bfd_reloc_code_real_type new_bfd_r_type;
3430 unsigned long r_symndx;
3431 bfd_byte *hit_data = contents + rel->r_offset;
3433 bfd_signed_vma signed_addend;
3434 struct elf_aarch64_link_hash_table *globals;
3435 bfd_boolean weak_undef_p;
3437 globals = elf_aarch64_hash_table (info);
3439 symtab_hdr = &elf_symtab_hdr (input_bfd);
3441 BFD_ASSERT (is_aarch64_elf (input_bfd));
3443 r_symndx = ELFNN_R_SYM (rel->r_info);
3445 /* It is possible to have linker relaxations on some TLS access
3446 models. Update our information here. */
3447 new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx);
3448 if (new_bfd_r_type != bfd_r_type)
3450 bfd_r_type = new_bfd_r_type;
3451 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
3452 BFD_ASSERT (howto != NULL);
3453 r_type = howto->type;
3456 place = input_section->output_section->vma
3457 + input_section->output_offset + rel->r_offset;
3459 /* Get addend, accumulating the addend for consecutive relocs
3460 which refer to the same offset. */
3461 signed_addend = saved_addend ? *saved_addend : 0;
3462 signed_addend += rel->r_addend;
3464 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
3465 : bfd_is_und_section (sym_sec));
3467 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3468 it here if it is defined in a non-shared object. */
3470 && h->type == STT_GNU_IFUNC
3478 if ((input_section->flags & SEC_ALLOC) == 0
3479 || h->plt.offset == (bfd_vma) -1)
3482 /* STT_GNU_IFUNC symbol must go through PLT. */
3483 plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
3484 value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
3489 if (h->root.root.string)
3490 name = h->root.root.string;
3492 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3494 (*_bfd_error_handler)
3495 (_("%B: relocation %s against STT_GNU_IFUNC "
3496 "symbol `%s' isn't handled by %s"), input_bfd,
3497 howto->name, name, __FUNCTION__);
3498 bfd_set_error (bfd_error_bad_value);
3501 case BFD_RELOC_AARCH64_NN:
3502 if (rel->r_addend != 0)
3504 if (h->root.root.string)
3505 name = h->root.root.string;
3507 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
3509 (*_bfd_error_handler)
3510 (_("%B: relocation %s against STT_GNU_IFUNC "
3511 "symbol `%s' has non-zero addend: %d"),
3512 input_bfd, howto->name, name, rel->r_addend);
3513 bfd_set_error (bfd_error_bad_value);
3517 /* Generate dynamic relocation only when there is a
3518 non-GOT reference in a shared object. */
3519 if (info->shared && h->non_got_ref)
3521 Elf_Internal_Rela outrel;
3524 /* Need a dynamic relocation to get the real function
3526 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
3530 if (outrel.r_offset == (bfd_vma) -1
3531 || outrel.r_offset == (bfd_vma) -2)
3534 outrel.r_offset += (input_section->output_section->vma
3535 + input_section->output_offset);
3537 if (h->dynindx == -1
3539 || info->executable)
3541 /* This symbol is resolved locally. */
3542 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
3543 outrel.r_addend = (h->root.u.def.value
3544 + h->root.u.def.section->output_section->vma
3545 + h->root.u.def.section->output_offset);
3549 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
3550 outrel.r_addend = 0;
3553 sreloc = globals->root.irelifunc;
3554 elf_append_rela (output_bfd, sreloc, &outrel);
3556 /* If this reloc is against an external symbol, we
3557 do not want to fiddle with the addend. Otherwise,
3558 we need to include the symbol value so that it
3559 becomes an addend for the dynamic reloc. For an
3560 internal symbol, we have updated addend. */
3561 return bfd_reloc_ok;
3564 case BFD_RELOC_AARCH64_JUMP26:
3565 case BFD_RELOC_AARCH64_CALL26:
3566 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3569 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
3571 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
3572 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
3573 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
3574 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
3575 base_got = globals->root.sgot;
3576 off = h->got.offset;
3578 if (base_got == NULL)
3581 if (off == (bfd_vma) -1)
3585 /* We can't use h->got.offset here to save state, or
3586 even just remember the offset, as finish_dynamic_symbol
3587 would use that as offset into .got. */
3589 if (globals->root.splt != NULL)
3591 plt_index = ((h->plt.offset - globals->plt_header_size) /
3592 globals->plt_entry_size);
3593 off = (plt_index + 3) * GOT_ENTRY_SIZE;
3594 base_got = globals->root.sgotplt;
3598 plt_index = h->plt.offset / globals->plt_entry_size;
3599 off = plt_index * GOT_ENTRY_SIZE;
3600 base_got = globals->root.igotplt;
3603 if (h->dynindx == -1
3607 /* This references the local definition. We must
3608 initialize this entry in the global offset table.
3609 Since the offset must always be a multiple of 8,
3610 we use the least significant bit to record
3611 whether we have initialized it already.
3613 When doing a dynamic link, we create a .rela.got
3614 relocation entry to initialize the value. This
3615 is done in the finish_dynamic_symbol routine. */
3620 bfd_put_NN (output_bfd, value,
3621 base_got->contents + off);
3622 /* Note that this is harmless as -1 | 1 still is -1. */
3626 value = (base_got->output_section->vma
3627 + base_got->output_offset + off);
3630 value = aarch64_calculate_got_entry_vma (h, globals, info,
3632 unresolved_reloc_p);
3633 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3635 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
3636 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
3637 case BFD_RELOC_AARCH64_ADD_LO12:
3644 case BFD_RELOC_AARCH64_NONE:
3645 case BFD_RELOC_AARCH64_TLSDESC_CALL:
3646 *unresolved_reloc_p = FALSE;
3647 return bfd_reloc_ok;
3649 case BFD_RELOC_AARCH64_NN:
3651 /* When generating a shared object or relocatable executable, these
3652 relocations are copied into the output file to be resolved at
3654 if (((info->shared == TRUE) || globals->root.is_relocatable_executable)
3655 && (input_section->flags & SEC_ALLOC)
3657 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3658 || h->root.type != bfd_link_hash_undefweak))
3660 Elf_Internal_Rela outrel;
3662 bfd_boolean skip, relocate;
3665 *unresolved_reloc_p = FALSE;
3670 outrel.r_addend = signed_addend;
3672 _bfd_elf_section_offset (output_bfd, info, input_section,
3674 if (outrel.r_offset == (bfd_vma) - 1)
3676 else if (outrel.r_offset == (bfd_vma) - 2)
3682 outrel.r_offset += (input_section->output_section->vma
3683 + input_section->output_offset);
3686 memset (&outrel, 0, sizeof outrel);
3689 && (!info->shared || !info->symbolic || !h->def_regular))
3690 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
3695 /* On SVR4-ish systems, the dynamic loader cannot
3696 relocate the text and data segments independently,
3697 so the symbol does not matter. */
3699 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
3700 outrel.r_addend += value;
3703 sreloc = elf_section_data (input_section)->sreloc;
3704 if (sreloc == NULL || sreloc->contents == NULL)
3705 return bfd_reloc_notsupported;
3707 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
3708 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
3710 if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
3712 /* Sanity to check that we have previously allocated
3713 sufficient space in the relocation section for the
3714 number of relocations we actually want to emit. */
3718 /* If this reloc is against an external symbol, we do not want to
3719 fiddle with the addend. Otherwise, we need to include the symbol
3720 value so that it becomes an addend for the dynamic reloc. */
3722 return bfd_reloc_ok;
3724 return _bfd_final_link_relocate (howto, input_bfd, input_section,
3725 contents, rel->r_offset, value,
3729 value += signed_addend;
3732 case BFD_RELOC_AARCH64_JUMP26:
3733 case BFD_RELOC_AARCH64_CALL26:
3735 asection *splt = globals->root.splt;
3736 bfd_boolean via_plt_p =
3737 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
3739 /* A call to an undefined weak symbol is converted to a jump to
3740 the next instruction unless a PLT entry will be created.
3741 The jump to the next instruction is optimized as a NOP.
3742 Do the same for local undefined symbols. */
3743 if (weak_undef_p && ! via_plt_p)
3745 bfd_putl32 (INSN_NOP, hit_data);
3746 return bfd_reloc_ok;
3749 /* If the call goes through a PLT entry, make sure to
3750 check distance to the right destination address. */
3753 value = (splt->output_section->vma
3754 + splt->output_offset + h->plt.offset);
3755 *unresolved_reloc_p = FALSE;
3758 /* If the target symbol is global and marked as a function the
3759 relocation applies a function call or a tail call. In this
3760 situation we can veneer out of range branches. The veneers
3761 use IP0 and IP1 hence cannot be used arbitrary out of range
3762 branches that occur within the body of a function. */
3763 if (h && h->type == STT_FUNC)
3765 /* Check if a stub has to be inserted because the destination
3767 if (! aarch64_valid_branch_p (value, place))
3769 /* The target is out of reach, so redirect the branch to
3770 the local stub for this function. */
3771 struct elf_aarch64_stub_hash_entry *stub_entry;
3772 stub_entry = elfNN_aarch64_get_stub_entry (input_section,
3775 if (stub_entry != NULL)
3776 value = (stub_entry->stub_offset
3777 + stub_entry->stub_sec->output_offset
3778 + stub_entry->stub_sec->output_section->vma);
3782 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3783 signed_addend, weak_undef_p);
3786 case BFD_RELOC_AARCH64_16:
3788 case BFD_RELOC_AARCH64_32:
3790 case BFD_RELOC_AARCH64_ADD_LO12:
3791 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
3792 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
3793 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
3794 case BFD_RELOC_AARCH64_BRANCH19:
3795 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
3796 case BFD_RELOC_AARCH64_LDST8_LO12:
3797 case BFD_RELOC_AARCH64_LDST16_LO12:
3798 case BFD_RELOC_AARCH64_LDST32_LO12:
3799 case BFD_RELOC_AARCH64_LDST64_LO12:
3800 case BFD_RELOC_AARCH64_LDST128_LO12:
3801 case BFD_RELOC_AARCH64_MOVW_G0_S:
3802 case BFD_RELOC_AARCH64_MOVW_G1_S:
3803 case BFD_RELOC_AARCH64_MOVW_G2_S:
3804 case BFD_RELOC_AARCH64_MOVW_G0:
3805 case BFD_RELOC_AARCH64_MOVW_G0_NC:
3806 case BFD_RELOC_AARCH64_MOVW_G1:
3807 case BFD_RELOC_AARCH64_MOVW_G1_NC:
3808 case BFD_RELOC_AARCH64_MOVW_G2:
3809 case BFD_RELOC_AARCH64_MOVW_G2_NC:
3810 case BFD_RELOC_AARCH64_MOVW_G3:
3811 case BFD_RELOC_AARCH64_16_PCREL:
3812 case BFD_RELOC_AARCH64_32_PCREL:
3813 case BFD_RELOC_AARCH64_64_PCREL:
3814 case BFD_RELOC_AARCH64_TSTBR14:
3815 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3816 signed_addend, weak_undef_p);
3819 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
3820 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
3821 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
3822 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
3823 if (globals->root.sgot == NULL)
3824 BFD_ASSERT (h != NULL);
3828 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
3830 unresolved_reloc_p);
3831 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3836 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3837 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3838 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
3839 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
3840 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
3841 if (globals->root.sgot == NULL)
3842 return bfd_reloc_notsupported;
3844 value = (symbol_got_offset (input_bfd, h, r_symndx)
3845 + globals->root.sgot->output_section->vma
3846 + globals->root.sgot->output_offset);
3848 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3850 *unresolved_reloc_p = FALSE;
3853 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
3854 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
3855 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
3856 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
3857 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
3858 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
3859 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
3860 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
3861 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3862 signed_addend - tpoff_base (info),
3864 *unresolved_reloc_p = FALSE;
3867 case BFD_RELOC_AARCH64_TLSDESC_ADD:
3868 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
3869 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3870 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
3871 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
3872 case BFD_RELOC_AARCH64_TLSDESC_LDR:
3873 if (globals->root.sgot == NULL)
3874 return bfd_reloc_notsupported;
3875 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
3876 + globals->root.sgotplt->output_section->vma
3877 + globals->root.sgotplt->output_offset
3878 + globals->sgotplt_jump_table_size);
3880 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
3882 *unresolved_reloc_p = FALSE;
3886 return bfd_reloc_notsupported;
3890 *saved_addend = value;
3892 /* Only apply the final relocation in a sequence. */
3894 return bfd_reloc_continue;
3896 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
3900 /* Handle TLS relaxations. Relaxing is possible for symbols that use
3901 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
3904 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
3905 is to then call final_link_relocate. Return other values in the
3908 static bfd_reloc_status_type
3909 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
3910 bfd *input_bfd, bfd_byte *contents,
3911 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
3913 bfd_boolean is_local = h == NULL;
3914 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
3917 BFD_ASSERT (globals && input_bfd && contents && rel);
3919 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
3921 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
3922 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
3925 /* GD->LE relaxation:
3926 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
3928 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
3930 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
3931 return bfd_reloc_continue;
3935 /* GD->IE relaxation:
3936 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
3938 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
3940 return bfd_reloc_continue;
3943 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
3946 /* GD->LE relaxation:
3947 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
3949 bfd_putl32 (0xf2800000, contents + rel->r_offset);
3950 return bfd_reloc_continue;
3954 /* GD->IE relaxation:
3955 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
3957 insn = bfd_getl32 (contents + rel->r_offset);
3959 bfd_putl32 (insn, contents + rel->r_offset);
3960 return bfd_reloc_continue;
3963 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
3966 /* GD->LE relaxation
3967 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
3968 bl __tls_get_addr => mrs x1, tpidr_el0
3969 nop => add x0, x1, x0
3972 /* First kill the tls_get_addr reloc on the bl instruction. */
3973 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
3974 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
3976 bfd_putl32 (0xf2800000, contents + rel->r_offset);
3977 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
3978 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
3979 return bfd_reloc_continue;
3983 /* GD->IE relaxation
3984 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
3985 BL __tls_get_addr => mrs x1, tpidr_el0
3987 NOP => add x0, x1, x0
3990 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
3992 /* Remove the relocation on the BL instruction. */
3993 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
3995 bfd_putl32 (0xf9400000, contents + rel->r_offset);
3997 /* We choose to fixup the BL and NOP instructions using the
3998 offset from the second relocation to allow flexibility in
3999 scheduling instructions between the ADD and BL. */
4000 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
4001 bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4);
4002 return bfd_reloc_continue;
4005 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4006 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4007 /* GD->IE/LE relaxation:
4008 add x0, x0, #:tlsdesc_lo12:var => nop
4011 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
4012 return bfd_reloc_ok;
4014 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4015 /* IE->LE relaxation:
4016 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
4020 insn = bfd_getl32 (contents + rel->r_offset);
4021 bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset);
4023 return bfd_reloc_continue;
4025 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4026 /* IE->LE relaxation:
4027 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
4031 insn = bfd_getl32 (contents + rel->r_offset);
4032 bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset);
4034 return bfd_reloc_continue;
4037 return bfd_reloc_continue;
4040 return bfd_reloc_ok;
4043 /* Relocate an AArch64 ELF section. */
4046 elfNN_aarch64_relocate_section (bfd *output_bfd,
4047 struct bfd_link_info *info,
4049 asection *input_section,
4051 Elf_Internal_Rela *relocs,
4052 Elf_Internal_Sym *local_syms,
4053 asection **local_sections)
4055 Elf_Internal_Shdr *symtab_hdr;
4056 struct elf_link_hash_entry **sym_hashes;
4057 Elf_Internal_Rela *rel;
4058 Elf_Internal_Rela *relend;
4060 struct elf_aarch64_link_hash_table *globals;
4061 bfd_boolean save_addend = FALSE;
4064 globals = elf_aarch64_hash_table (info);
4066 symtab_hdr = &elf_symtab_hdr (input_bfd);
4067 sym_hashes = elf_sym_hashes (input_bfd);
4070 relend = relocs + input_section->reloc_count;
4071 for (; rel < relend; rel++)
4073 unsigned int r_type;
4074 bfd_reloc_code_real_type bfd_r_type;
4075 bfd_reloc_code_real_type relaxed_bfd_r_type;
4076 reloc_howto_type *howto;
4077 unsigned long r_symndx;
4078 Elf_Internal_Sym *sym;
4080 struct elf_link_hash_entry *h;
4082 bfd_reloc_status_type r;
4085 bfd_boolean unresolved_reloc = FALSE;
4086 char *error_message = NULL;
4088 r_symndx = ELFNN_R_SYM (rel->r_info);
4089 r_type = ELFNN_R_TYPE (rel->r_info);
4091 bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type);
4092 howto = bfd_reloc.howto;
4096 (*_bfd_error_handler)
4097 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
4098 input_bfd, input_section, r_type);
4101 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
4107 if (r_symndx < symtab_hdr->sh_info)
4109 sym = local_syms + r_symndx;
4110 sym_type = ELFNN_ST_TYPE (sym->st_info);
4111 sec = local_sections[r_symndx];
4113 /* An object file might have a reference to a local
4114 undefined symbol. This is a daft object file, but we
4115 should at least do something about it. */
4116 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
4117 && bfd_is_und_section (sec)
4118 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
4120 if (!info->callbacks->undefined_symbol
4121 (info, bfd_elf_string_from_elf_section
4122 (input_bfd, symtab_hdr->sh_link, sym->st_name),
4123 input_bfd, input_section, rel->r_offset, TRUE))
4127 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
4129 /* Relocate against local STT_GNU_IFUNC symbol. */
4130 if (!info->relocatable
4131 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4133 h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
4138 /* Set STT_GNU_IFUNC symbol value. */
4139 h->root.u.def.value = sym->st_value;
4140 h->root.u.def.section = sec;
4145 bfd_boolean warned, ignored;
4147 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
4148 r_symndx, symtab_hdr, sym_hashes,
4150 unresolved_reloc, warned, ignored);
4155 if (sec != NULL && discarded_section (sec))
4156 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
4157 rel, 1, relend, howto, 0, contents);
4159 if (info->relocatable)
4161 /* This is a relocatable link. We don't have to change
4162 anything, unless the reloc is against a section symbol,
4163 in which case we have to adjust according to where the
4164 section symbol winds up in the output section. */
4165 if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
4166 rel->r_addend += sec->output_offset;
4171 name = h->root.root.string;
4174 name = (bfd_elf_string_from_elf_section
4175 (input_bfd, symtab_hdr->sh_link, sym->st_name));
4176 if (name == NULL || *name == '\0')
4177 name = bfd_section_name (input_bfd, sec);
4181 && r_type != R_AARCH64_NONE
4182 && r_type != R_AARCH64_NULL
4184 || h->root.type == bfd_link_hash_defined
4185 || h->root.type == bfd_link_hash_defweak)
4186 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
4188 (*_bfd_error_handler)
4189 ((sym_type == STT_TLS
4190 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
4191 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
4193 input_section, (long) rel->r_offset, howto->name, name);
4196 /* We relax only if we can see that there can be a valid transition
4197 from a reloc type to another.
4198 We call elfNN_aarch64_final_link_relocate unless we're completely
4199 done, i.e., the relaxation produced the final output we want. */
4201 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
4203 if (relaxed_bfd_r_type != bfd_r_type)
4205 bfd_r_type = relaxed_bfd_r_type;
4206 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4207 BFD_ASSERT (howto != NULL);
4208 r_type = howto->type;
4209 r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
4210 unresolved_reloc = 0;
4213 r = bfd_reloc_continue;
4215 /* There may be multiple consecutive relocations for the
4216 same offset. In that case we are supposed to treat the
4217 output of each relocation as the addend for the next. */
4218 if (rel + 1 < relend
4219 && rel->r_offset == rel[1].r_offset
4220 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
4221 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
4224 save_addend = FALSE;
4226 if (r == bfd_reloc_continue)
4227 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
4228 input_section, contents, rel,
4229 relocation, info, sec,
4230 h, &unresolved_reloc,
4231 save_addend, &addend, sym);
4233 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
4235 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4236 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4237 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
4239 bfd_boolean need_relocs = FALSE;
4244 off = symbol_got_offset (input_bfd, h, r_symndx);
4245 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4248 (info->shared || indx != 0) &&
4250 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4251 || h->root.type != bfd_link_hash_undefweak);
4253 BFD_ASSERT (globals->root.srelgot != NULL);
4257 Elf_Internal_Rela rela;
4258 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
4260 rela.r_offset = globals->root.sgot->output_section->vma +
4261 globals->root.sgot->output_offset + off;
4264 loc = globals->root.srelgot->contents;
4265 loc += globals->root.srelgot->reloc_count++
4266 * RELOC_SIZE (htab);
4267 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4271 bfd_put_NN (output_bfd,
4272 relocation - dtpoff_base (info),
4273 globals->root.sgot->contents + off
4278 /* This TLS symbol is global. We emit a
4279 relocation to fixup the tls offset at load
4282 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
4285 (globals->root.sgot->output_section->vma
4286 + globals->root.sgot->output_offset + off
4289 loc = globals->root.srelgot->contents;
4290 loc += globals->root.srelgot->reloc_count++
4291 * RELOC_SIZE (globals);
4292 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4293 bfd_put_NN (output_bfd, (bfd_vma) 0,
4294 globals->root.sgot->contents + off
4300 bfd_put_NN (output_bfd, (bfd_vma) 1,
4301 globals->root.sgot->contents + off);
4302 bfd_put_NN (output_bfd,
4303 relocation - dtpoff_base (info),
4304 globals->root.sgot->contents + off
4308 symbol_got_offset_mark (input_bfd, h, r_symndx);
4312 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4313 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4314 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
4316 bfd_boolean need_relocs = FALSE;
4321 off = symbol_got_offset (input_bfd, h, r_symndx);
4323 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4326 (info->shared || indx != 0) &&
4328 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4329 || h->root.type != bfd_link_hash_undefweak);
4331 BFD_ASSERT (globals->root.srelgot != NULL);
4335 Elf_Internal_Rela rela;
4338 rela.r_addend = relocation - dtpoff_base (info);
4342 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
4343 rela.r_offset = globals->root.sgot->output_section->vma +
4344 globals->root.sgot->output_offset + off;
4346 loc = globals->root.srelgot->contents;
4347 loc += globals->root.srelgot->reloc_count++
4348 * RELOC_SIZE (htab);
4350 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4352 bfd_put_NN (output_bfd, rela.r_addend,
4353 globals->root.sgot->contents + off);
4356 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
4357 globals->root.sgot->contents + off);
4359 symbol_got_offset_mark (input_bfd, h, r_symndx);
4363 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4364 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4365 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4366 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4367 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4368 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4369 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4370 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4373 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4374 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4375 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4376 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
4378 bfd_boolean need_relocs = FALSE;
4379 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
4380 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
4382 need_relocs = (h == NULL
4383 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4384 || h->root.type != bfd_link_hash_undefweak);
4386 BFD_ASSERT (globals->root.srelgot != NULL);
4387 BFD_ASSERT (globals->root.sgot != NULL);
4392 Elf_Internal_Rela rela;
4393 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
4396 rela.r_offset = (globals->root.sgotplt->output_section->vma
4397 + globals->root.sgotplt->output_offset
4398 + off + globals->sgotplt_jump_table_size);
4401 rela.r_addend = relocation - dtpoff_base (info);
4403 /* Allocate the next available slot in the PLT reloc
4404 section to hold our R_AARCH64_TLSDESC, the next
4405 available slot is determined from reloc_count,
4406 which we step. But note, reloc_count was
4407 artifically moved down while allocating slots for
4408 real PLT relocs such that all of the PLT relocs
4409 will fit above the initial reloc_count and the
4410 extra stuff will fit below. */
4411 loc = globals->root.srelplt->contents;
4412 loc += globals->root.srelplt->reloc_count++
4413 * RELOC_SIZE (globals);
4415 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
4417 bfd_put_NN (output_bfd, (bfd_vma) 0,
4418 globals->root.sgotplt->contents + off +
4419 globals->sgotplt_jump_table_size);
4420 bfd_put_NN (output_bfd, (bfd_vma) 0,
4421 globals->root.sgotplt->contents + off +
4422 globals->sgotplt_jump_table_size +
4426 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
4437 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4438 because such sections are not SEC_ALLOC and thus ld.so will
4439 not process them. */
4440 if (unresolved_reloc
4441 && !((input_section->flags & SEC_DEBUGGING) != 0
4443 && _bfd_elf_section_offset (output_bfd, info, input_section,
4444 +rel->r_offset) != (bfd_vma) - 1)
4446 (*_bfd_error_handler)
4448 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4449 input_bfd, input_section, (long) rel->r_offset, howto->name,
4450 h->root.root.string);
4454 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
4458 case bfd_reloc_overflow:
4459 /* If the overflowing reloc was to an undefined symbol,
4460 we have already printed one error message and there
4461 is no point complaining again. */
4463 h->root.type != bfd_link_hash_undefined)
4464 && (!((*info->callbacks->reloc_overflow)
4465 (info, (h ? &h->root : NULL), name, howto->name,
4466 (bfd_vma) 0, input_bfd, input_section,
4471 case bfd_reloc_undefined:
4472 if (!((*info->callbacks->undefined_symbol)
4473 (info, name, input_bfd, input_section,
4474 rel->r_offset, TRUE)))
4478 case bfd_reloc_outofrange:
4479 error_message = _("out of range");
4482 case bfd_reloc_notsupported:
4483 error_message = _("unsupported relocation");
4486 case bfd_reloc_dangerous:
4487 /* error_message should already be set. */
4491 error_message = _("unknown error");
4495 BFD_ASSERT (error_message != NULL);
4496 if (!((*info->callbacks->reloc_dangerous)
4497 (info, error_message, input_bfd, input_section,
4508 /* Set the right machine number. */
4511 elfNN_aarch64_object_p (bfd *abfd)
4514 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
4516 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
4521 /* Function to keep AArch64 specific flags in the ELF header. */
4524 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
4526 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
4531 elf_elfheader (abfd)->e_flags = flags;
4532 elf_flags_init (abfd) = TRUE;
4538 /* Merge backend specific data from an object file to the output
4539 object file when linking. */
4542 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4546 bfd_boolean flags_compatible = TRUE;
4549 /* Check if we have the same endianess. */
4550 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
4553 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
4556 /* The input BFD must have had its flags initialised. */
4557 /* The following seems bogus to me -- The flags are initialized in
4558 the assembler but I don't think an elf_flags_init field is
4559 written into the object. */
4560 /* BFD_ASSERT (elf_flags_init (ibfd)); */
4562 in_flags = elf_elfheader (ibfd)->e_flags;
4563 out_flags = elf_elfheader (obfd)->e_flags;
4565 if (!elf_flags_init (obfd))
4567 /* If the input is the default architecture and had the default
4568 flags then do not bother setting the flags for the output
4569 architecture, instead allow future merges to do this. If no
4570 future merges ever set these flags then they will retain their
4571 uninitialised values, which surprise surprise, correspond
4572 to the default values. */
4573 if (bfd_get_arch_info (ibfd)->the_default
4574 && elf_elfheader (ibfd)->e_flags == 0)
4577 elf_flags_init (obfd) = TRUE;
4578 elf_elfheader (obfd)->e_flags = in_flags;
4580 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
4581 && bfd_get_arch_info (obfd)->the_default)
4582 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
4583 bfd_get_mach (ibfd));
4588 /* Identical flags must be compatible. */
4589 if (in_flags == out_flags)
4592 /* Check to see if the input BFD actually contains any sections. If
4593 not, its flags may not have been initialised either, but it
4594 cannot actually cause any incompatiblity. Do not short-circuit
4595 dynamic objects; their section list may be emptied by
4596 elf_link_add_object_symbols.
4598 Also check to see if there are no code sections in the input.
4599 In this case there is no need to check for code specific flags.
4600 XXX - do we need to worry about floating-point format compatability
4601 in data sections ? */
4602 if (!(ibfd->flags & DYNAMIC))
4604 bfd_boolean null_input_bfd = TRUE;
4605 bfd_boolean only_data_sections = TRUE;
4607 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
4609 if ((bfd_get_section_flags (ibfd, sec)
4610 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4611 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
4612 only_data_sections = FALSE;
4614 null_input_bfd = FALSE;
4618 if (null_input_bfd || only_data_sections)
4622 return flags_compatible;
4625 /* Display the flags field. */
4628 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
4630 FILE *file = (FILE *) ptr;
4631 unsigned long flags;
4633 BFD_ASSERT (abfd != NULL && ptr != NULL);
4635 /* Print normal ELF private data. */
4636 _bfd_elf_print_private_bfd_data (abfd, ptr);
4638 flags = elf_elfheader (abfd)->e_flags;
4639 /* Ignore init flag - it may not be set, despite the flags field
4640 containing valid data. */
4642 /* xgettext:c-format */
4643 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4646 fprintf (file, _("<Unrecognised flag bits set>"));
4653 /* Update the got entry reference counts for the section being removed. */
4656 elfNN_aarch64_gc_sweep_hook (bfd *abfd,
4657 struct bfd_link_info *info,
4659 const Elf_Internal_Rela * relocs)
4661 struct elf_aarch64_link_hash_table *htab;
4662 Elf_Internal_Shdr *symtab_hdr;
4663 struct elf_link_hash_entry **sym_hashes;
4664 struct elf_aarch64_local_symbol *locals;
4665 const Elf_Internal_Rela *rel, *relend;
4667 if (info->relocatable)
4670 htab = elf_aarch64_hash_table (info);
4675 elf_section_data (sec)->local_dynrel = NULL;
4677 symtab_hdr = &elf_symtab_hdr (abfd);
4678 sym_hashes = elf_sym_hashes (abfd);
4680 locals = elf_aarch64_locals (abfd);
4682 relend = relocs + sec->reloc_count;
4683 for (rel = relocs; rel < relend; rel++)
4685 unsigned long r_symndx;
4686 unsigned int r_type;
4687 struct elf_link_hash_entry *h = NULL;
4689 r_symndx = ELFNN_R_SYM (rel->r_info);
4691 if (r_symndx >= symtab_hdr->sh_info)
4694 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
4695 while (h->root.type == bfd_link_hash_indirect
4696 || h->root.type == bfd_link_hash_warning)
4697 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4701 Elf_Internal_Sym *isym;
4703 /* A local symbol. */
4704 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
4707 /* Check relocation against local STT_GNU_IFUNC symbol. */
4709 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
4711 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE);
4719 struct elf_aarch64_link_hash_entry *eh;
4720 struct elf_dyn_relocs **pp;
4721 struct elf_dyn_relocs *p;
4723 eh = (struct elf_aarch64_link_hash_entry *) h;
4725 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
4728 /* Everything must go for SEC. */
4734 r_type = ELFNN_R_TYPE (rel->r_info);
4735 switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx))
4737 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4738 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4739 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4740 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4741 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4742 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4743 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4744 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
4745 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4746 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4747 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4748 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4749 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4750 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
4751 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
4752 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
4753 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
4754 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
4755 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
4756 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
4757 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
4760 if (h->got.refcount > 0)
4761 h->got.refcount -= 1;
4763 if (h->type == STT_GNU_IFUNC)
4765 if (h->plt.refcount > 0)
4766 h->plt.refcount -= 1;
4769 else if (locals != NULL)
4771 if (locals[r_symndx].got_refcount > 0)
4772 locals[r_symndx].got_refcount -= 1;
4776 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
4777 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
4778 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
4779 if (h != NULL && info->executable)
4781 if (h->plt.refcount > 0)
4782 h->plt.refcount -= 1;
4786 case BFD_RELOC_AARCH64_CALL26:
4787 case BFD_RELOC_AARCH64_JUMP26:
4788 /* If this is a local symbol then we resolve it
4789 directly without creating a PLT entry. */
4793 if (h->plt.refcount > 0)
4794 h->plt.refcount -= 1;
4797 case BFD_RELOC_AARCH64_NN:
4798 if (h != NULL && info->executable)
4800 if (h->plt.refcount > 0)
4801 h->plt.refcount -= 1;
4813 /* Adjust a symbol defined by a dynamic object and referenced by a
4814 regular object. The current definition is in some section of the
4815 dynamic object, but we're not including those sections. We have to
4816 change the definition to something the rest of the link can
4820 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
4821 struct elf_link_hash_entry *h)
4823 struct elf_aarch64_link_hash_table *htab;
4826 /* If this is a function, put it in the procedure linkage table. We
4827 will fill in the contents of the procedure linkage table later,
4828 when we know the address of the .got section. */
4829 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
4831 if (h->plt.refcount <= 0
4832 || (h->type != STT_GNU_IFUNC
4833 && (SYMBOL_CALLS_LOCAL (info, h)
4834 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4835 && h->root.type == bfd_link_hash_undefweak))))
4837 /* This case can occur if we saw a CALL26 reloc in
4838 an input file, but the symbol wasn't referred to
4839 by a dynamic object or all references were
4840 garbage collected. In which case we can end up
4842 h->plt.offset = (bfd_vma) - 1;
4849 /* It's possible that we incorrectly decided a .plt reloc was
4850 needed for an R_X86_64_PC32 reloc to a non-function sym in
4851 check_relocs. We can't decide accurately between function and
4852 non-function syms in check-relocs; Objects loaded later in
4853 the link may change h->type. So fix it now. */
4854 h->plt.offset = (bfd_vma) - 1;
4857 /* If this is a weak symbol, and there is a real definition, the
4858 processor independent code will have arranged for us to see the
4859 real definition first, and we can just use the same value. */
4860 if (h->u.weakdef != NULL)
4862 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4863 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4864 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4865 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4866 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
4867 h->non_got_ref = h->u.weakdef->non_got_ref;
4871 /* If we are creating a shared library, we must presume that the
4872 only references to the symbol are via the global offset table.
4873 For such cases we need not do anything here; the relocations will
4874 be handled correctly by relocate_section. */
4878 /* If there are no references to this symbol that do not use the
4879 GOT, we don't need to generate a copy reloc. */
4880 if (!h->non_got_ref)
4883 /* If -z nocopyreloc was given, we won't generate them either. */
4884 if (info->nocopyreloc)
4890 /* We must allocate the symbol in our .dynbss section, which will
4891 become part of the .bss section of the executable. There will be
4892 an entry for this symbol in the .dynsym section. The dynamic
4893 object will contain position independent code, so all references
4894 from the dynamic object to this symbol will go through the global
4895 offset table. The dynamic linker will use the .dynsym entry to
4896 determine the address it must put in the global offset table, so
4897 both the dynamic object and the regular object will refer to the
4898 same memory location for the variable. */
4900 htab = elf_aarch64_hash_table (info);
4902 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
4903 to copy the initial value out of the dynamic object and into the
4904 runtime process image. */
4905 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
4907 htab->srelbss->size += RELOC_SIZE (htab);
4913 return _bfd_elf_adjust_dynamic_copy (h, s);
4918 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
4920 struct elf_aarch64_local_symbol *locals;
4921 locals = elf_aarch64_locals (abfd);
4924 locals = (struct elf_aarch64_local_symbol *)
4925 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
4928 elf_aarch64_locals (abfd) = locals;
4933 /* Create the .got section to hold the global offset table. */
4936 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
4938 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
4941 struct elf_link_hash_entry *h;
4942 struct elf_link_hash_table *htab = elf_hash_table (info);
4944 /* This function may be called more than once. */
4945 s = bfd_get_linker_section (abfd, ".got");
4949 flags = bed->dynamic_sec_flags;
4951 s = bfd_make_section_anyway_with_flags (abfd,
4952 (bed->rela_plts_and_copies_p
4953 ? ".rela.got" : ".rel.got"),
4954 (bed->dynamic_sec_flags
4957 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
4961 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
4963 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
4966 htab->sgot->size += GOT_ENTRY_SIZE;
4968 if (bed->want_got_sym)
4970 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
4971 (or .got.plt) section. We don't do this in the linker script
4972 because we don't want to define the symbol if we are not creating
4973 a global offset table. */
4974 h = _bfd_elf_define_linkage_sym (abfd, info, s,
4975 "_GLOBAL_OFFSET_TABLE_");
4976 elf_hash_table (info)->hgot = h;
4981 if (bed->want_got_plt)
4983 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
4985 || !bfd_set_section_alignment (abfd, s,
4986 bed->s->log_file_align))
4991 /* The first bit of the global offset table is the header. */
4992 s->size += bed->got_header_size;
4997 /* Look through the relocs for a section during the first phase. */
5000 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
5001 asection *sec, const Elf_Internal_Rela *relocs)
5003 Elf_Internal_Shdr *symtab_hdr;
5004 struct elf_link_hash_entry **sym_hashes;
5005 const Elf_Internal_Rela *rel;
5006 const Elf_Internal_Rela *rel_end;
5009 struct elf_aarch64_link_hash_table *htab;
5011 if (info->relocatable)
5014 BFD_ASSERT (is_aarch64_elf (abfd));
5016 htab = elf_aarch64_hash_table (info);
5019 symtab_hdr = &elf_symtab_hdr (abfd);
5020 sym_hashes = elf_sym_hashes (abfd);
5022 rel_end = relocs + sec->reloc_count;
5023 for (rel = relocs; rel < rel_end; rel++)
5025 struct elf_link_hash_entry *h;
5026 unsigned long r_symndx;
5027 unsigned int r_type;
5028 bfd_reloc_code_real_type bfd_r_type;
5029 Elf_Internal_Sym *isym;
5031 r_symndx = ELFNN_R_SYM (rel->r_info);
5032 r_type = ELFNN_R_TYPE (rel->r_info);
5034 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
5036 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
5041 if (r_symndx < symtab_hdr->sh_info)
5043 /* A local symbol. */
5044 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5049 /* Check relocation against local STT_GNU_IFUNC symbol. */
5050 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
5052 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
5057 /* Fake a STT_GNU_IFUNC symbol. */
5058 h->type = STT_GNU_IFUNC;
5061 h->forced_local = 1;
5062 h->root.type = bfd_link_hash_defined;
5069 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
5070 while (h->root.type == bfd_link_hash_indirect
5071 || h->root.type == bfd_link_hash_warning)
5072 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5074 /* PR15323, ref flags aren't set for references in the same
5076 h->root.non_ir_ref = 1;
5079 /* Could be done earlier, if h were already available. */
5080 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
5084 /* Create the ifunc sections for static executables. If we
5085 never see an indirect function symbol nor we are building
5086 a static executable, those sections will be empty and
5087 won't appear in output. */
5093 case BFD_RELOC_AARCH64_NN:
5094 case BFD_RELOC_AARCH64_CALL26:
5095 case BFD_RELOC_AARCH64_JUMP26:
5096 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5097 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5098 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5099 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5100 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5101 case BFD_RELOC_AARCH64_ADD_LO12:
5102 if (htab->root.dynobj == NULL)
5103 htab->root.dynobj = abfd;
5104 if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
5109 /* It is referenced by a non-shared object. */
5111 h->root.non_ir_ref = 1;
5116 case BFD_RELOC_AARCH64_NN:
5118 /* We don't need to handle relocs into sections not going into
5119 the "real" output. */
5120 if ((sec->flags & SEC_ALLOC) == 0)
5128 h->plt.refcount += 1;
5129 h->pointer_equality_needed = 1;
5132 /* No need to do anything if we're not creating a shared
5138 struct elf_dyn_relocs *p;
5139 struct elf_dyn_relocs **head;
5141 /* We must copy these reloc types into the output file.
5142 Create a reloc section in dynobj and make room for
5146 if (htab->root.dynobj == NULL)
5147 htab->root.dynobj = abfd;
5149 sreloc = _bfd_elf_make_dynamic_reloc_section
5150 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
5156 /* If this is a global symbol, we count the number of
5157 relocations we need for this symbol. */
5160 struct elf_aarch64_link_hash_entry *eh;
5161 eh = (struct elf_aarch64_link_hash_entry *) h;
5162 head = &eh->dyn_relocs;
5166 /* Track dynamic relocs needed for local syms too.
5167 We really need local syms available to do this
5173 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
5178 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
5182 /* Beware of type punned pointers vs strict aliasing
5184 vpp = &(elf_section_data (s)->local_dynrel);
5185 head = (struct elf_dyn_relocs **) vpp;
5189 if (p == NULL || p->sec != sec)
5191 bfd_size_type amt = sizeof *p;
5192 p = ((struct elf_dyn_relocs *)
5193 bfd_zalloc (htab->root.dynobj, amt));
5206 /* RR: We probably want to keep a consistency check that
5207 there are no dangling GOT_PAGE relocs. */
5208 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5209 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5210 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5211 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5212 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5213 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5214 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5215 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5216 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5217 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5218 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5219 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5220 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5221 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5222 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5223 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5224 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5225 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5226 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5227 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5228 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5231 unsigned old_got_type;
5233 got_type = aarch64_reloc_got_type (bfd_r_type);
5237 h->got.refcount += 1;
5238 old_got_type = elf_aarch64_hash_entry (h)->got_type;
5242 struct elf_aarch64_local_symbol *locals;
5244 if (!elfNN_aarch64_allocate_local_symbols
5245 (abfd, symtab_hdr->sh_info))
5248 locals = elf_aarch64_locals (abfd);
5249 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
5250 locals[r_symndx].got_refcount += 1;
5251 old_got_type = locals[r_symndx].got_type;
5254 /* If a variable is accessed with both general dynamic TLS
5255 methods, two slots may be created. */
5256 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
5257 got_type |= old_got_type;
5259 /* We will already have issued an error message if there
5260 is a TLS/non-TLS mismatch, based on the symbol type.
5261 So just combine any TLS types needed. */
5262 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
5263 && got_type != GOT_NORMAL)
5264 got_type |= old_got_type;
5266 /* If the symbol is accessed by both IE and GD methods, we
5267 are able to relax. Turn off the GD flag, without
5268 messing up with any other kind of TLS types that may be
5270 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
5271 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
5273 if (old_got_type != got_type)
5276 elf_aarch64_hash_entry (h)->got_type = got_type;
5279 struct elf_aarch64_local_symbol *locals;
5280 locals = elf_aarch64_locals (abfd);
5281 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
5282 locals[r_symndx].got_type = got_type;
5286 if (htab->root.dynobj == NULL)
5287 htab->root.dynobj = abfd;
5288 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
5293 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
5294 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5295 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
5296 if (h != NULL && info->executable)
5298 /* If this reloc is in a read-only section, we might
5299 need a copy reloc. We can't check reliably at this
5300 stage whether the section is read-only, as input
5301 sections have not yet been mapped to output sections.
5302 Tentatively set the flag for now, and correct in
5303 adjust_dynamic_symbol. */
5305 h->plt.refcount += 1;
5306 h->pointer_equality_needed = 1;
5308 /* FIXME:: RR need to handle these in shared libraries
5309 and essentially bomb out as these being non-PIC
5310 relocations in shared libraries. */
5313 case BFD_RELOC_AARCH64_CALL26:
5314 case BFD_RELOC_AARCH64_JUMP26:
5315 /* If this is a local symbol then we resolve it
5316 directly without creating a PLT entry. */
5321 if (h->plt.refcount <= 0)
5322 h->plt.refcount = 1;
5324 h->plt.refcount += 1;
5335 /* Treat mapping symbols as special target symbols. */
5338 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
5341 return bfd_is_aarch64_special_symbol_name (sym->name,
5342 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
5345 /* This is a copy of elf_find_function () from elf.c except that
5346 AArch64 mapping symbols are ignored when looking for function names. */
5349 aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
5353 const char **filename_ptr,
5354 const char **functionname_ptr)
5356 const char *filename = NULL;
5357 asymbol *func = NULL;
5358 bfd_vma low_func = 0;
5361 for (p = symbols; *p != NULL; p++)
5365 q = (elf_symbol_type *) * p;
5367 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
5372 filename = bfd_asymbol_name (&q->symbol);
5376 /* Skip mapping symbols. */
5377 if ((q->symbol.flags & BSF_LOCAL)
5378 && (bfd_is_aarch64_special_symbol_name
5379 (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
5382 if (bfd_get_section (&q->symbol) == section
5383 && q->symbol.value >= low_func && q->symbol.value <= offset)
5385 func = (asymbol *) q;
5386 low_func = q->symbol.value;
5396 *filename_ptr = filename;
5397 if (functionname_ptr)
5398 *functionname_ptr = bfd_asymbol_name (func);
5404 /* Find the nearest line to a particular section and offset, for error
5405 reporting. This code is a duplicate of the code in elf.c, except
5406 that it uses aarch64_elf_find_function. */
5409 elfNN_aarch64_find_nearest_line (bfd *abfd,
5413 const char **filename_ptr,
5414 const char **functionname_ptr,
5415 unsigned int *line_ptr)
5417 bfd_boolean found = FALSE;
5419 /* We skip _bfd_dwarf1_find_nearest_line since no known AArch64
5420 toolchain uses it. */
5422 if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
5423 section, symbols, offset,
5424 filename_ptr, functionname_ptr,
5426 &elf_tdata (abfd)->dwarf2_find_line_info))
5428 if (!*functionname_ptr)
5429 aarch64_elf_find_function (abfd, section, symbols, offset,
5430 *filename_ptr ? NULL : filename_ptr,
5436 if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
5437 &found, filename_ptr,
5438 functionname_ptr, line_ptr,
5439 &elf_tdata (abfd)->line_info))
5442 if (found && (*functionname_ptr || *line_ptr))
5445 if (symbols == NULL)
5448 if (!aarch64_elf_find_function (abfd, section, symbols, offset,
5449 filename_ptr, functionname_ptr))
5457 elfNN_aarch64_find_inliner_info (bfd *abfd,
5458 const char **filename_ptr,
5459 const char **functionname_ptr,
5460 unsigned int *line_ptr)
5463 found = _bfd_dwarf2_find_inliner_info
5464 (abfd, filename_ptr,
5465 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
5471 elfNN_aarch64_post_process_headers (bfd *abfd,
5472 struct bfd_link_info *link_info)
5474 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
5476 i_ehdrp = elf_elfheader (abfd);
5477 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
5479 _bfd_elf_post_process_headers (abfd, link_info);
5482 static enum elf_reloc_type_class
5483 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
5484 const asection *rel_sec ATTRIBUTE_UNUSED,
5485 const Elf_Internal_Rela *rela)
5487 switch ((int) ELFNN_R_TYPE (rela->r_info))
5489 case AARCH64_R (RELATIVE):
5490 return reloc_class_relative;
5491 case AARCH64_R (JUMP_SLOT):
5492 return reloc_class_plt;
5493 case AARCH64_R (COPY):
5494 return reloc_class_copy;
5496 return reloc_class_normal;
5500 /* Handle an AArch64 specific section when reading an object file. This is
5501 called when bfd_section_from_shdr finds a section with an unknown
5505 elfNN_aarch64_section_from_shdr (bfd *abfd,
5506 Elf_Internal_Shdr *hdr,
5507 const char *name, int shindex)
5509 /* There ought to be a place to keep ELF backend specific flags, but
5510 at the moment there isn't one. We just keep track of the
5511 sections by their name, instead. Fortunately, the ABI gives
5512 names for all the AArch64 specific sections, so we will probably get
5514 switch (hdr->sh_type)
5516 case SHT_AARCH64_ATTRIBUTES:
5523 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
5529 /* A structure used to record a list of sections, independently
5530 of the next and prev fields in the asection structure. */
5531 typedef struct section_list
5534 struct section_list *next;
5535 struct section_list *prev;
5539 /* Unfortunately we need to keep a list of sections for which
5540 an _aarch64_elf_section_data structure has been allocated. This
5541 is because it is possible for functions like elfNN_aarch64_write_section
5542 to be called on a section which has had an elf_data_structure
5543 allocated for it (and so the used_by_bfd field is valid) but
5544 for which the AArch64 extended version of this structure - the
5545 _aarch64_elf_section_data structure - has not been allocated. */
5546 static section_list *sections_with_aarch64_elf_section_data = NULL;
5549 record_section_with_aarch64_elf_section_data (asection *sec)
5551 struct section_list *entry;
5553 entry = bfd_malloc (sizeof (*entry));
5557 entry->next = sections_with_aarch64_elf_section_data;
5559 if (entry->next != NULL)
5560 entry->next->prev = entry;
5561 sections_with_aarch64_elf_section_data = entry;
5564 static struct section_list *
5565 find_aarch64_elf_section_entry (asection *sec)
5567 struct section_list *entry;
5568 static struct section_list *last_entry = NULL;
5570 /* This is a short cut for the typical case where the sections are added
5571 to the sections_with_aarch64_elf_section_data list in forward order and
5572 then looked up here in backwards order. This makes a real difference
5573 to the ld-srec/sec64k.exp linker test. */
5574 entry = sections_with_aarch64_elf_section_data;
5575 if (last_entry != NULL)
5577 if (last_entry->sec == sec)
5579 else if (last_entry->next != NULL && last_entry->next->sec == sec)
5580 entry = last_entry->next;
5583 for (; entry; entry = entry->next)
5584 if (entry->sec == sec)
5588 /* Record the entry prior to this one - it is the entry we are
5589 most likely to want to locate next time. Also this way if we
5590 have been called from
5591 unrecord_section_with_aarch64_elf_section_data () we will not
5592 be caching a pointer that is about to be freed. */
5593 last_entry = entry->prev;
5599 unrecord_section_with_aarch64_elf_section_data (asection *sec)
5601 struct section_list *entry;
5603 entry = find_aarch64_elf_section_entry (sec);
5607 if (entry->prev != NULL)
5608 entry->prev->next = entry->next;
5609 if (entry->next != NULL)
5610 entry->next->prev = entry->prev;
5611 if (entry == sections_with_aarch64_elf_section_data)
5612 sections_with_aarch64_elf_section_data = entry->next;
5621 struct bfd_link_info *info;
5624 int (*func) (void *, const char *, Elf_Internal_Sym *,
5625 asection *, struct elf_link_hash_entry *);
5626 } output_arch_syminfo;
5628 enum map_symbol_type
5635 /* Output a single mapping symbol. */
5638 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
5639 enum map_symbol_type type, bfd_vma offset)
5641 static const char *names[2] = { "$x", "$d" };
5642 Elf_Internal_Sym sym;
5644 sym.st_value = (osi->sec->output_section->vma
5645 + osi->sec->output_offset + offset);
5648 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
5649 sym.st_shndx = osi->sec_shndx;
5650 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
5655 /* Output mapping symbols for PLT entries associated with H. */
5658 elfNN_aarch64_output_plt_map (struct elf_link_hash_entry *h, void *inf)
5660 output_arch_syminfo *osi = (output_arch_syminfo *) inf;
5663 if (h->root.type == bfd_link_hash_indirect)
5666 if (h->root.type == bfd_link_hash_warning)
5667 /* When warning symbols are created, they **replace** the "real"
5668 entry in the hash table, thus we never get to see the real
5669 symbol in a hash traversal. So look at it now. */
5670 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5672 if (h->plt.offset == (bfd_vma) - 1)
5675 addr = h->plt.offset;
5678 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
5685 /* Output a single local symbol for a generated stub. */
5688 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
5689 bfd_vma offset, bfd_vma size)
5691 Elf_Internal_Sym sym;
5693 sym.st_value = (osi->sec->output_section->vma
5694 + osi->sec->output_offset + offset);
5697 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
5698 sym.st_shndx = osi->sec_shndx;
5699 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
5703 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
5705 struct elf_aarch64_stub_hash_entry *stub_entry;
5709 output_arch_syminfo *osi;
5711 /* Massage our args to the form they really have. */
5712 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
5713 osi = (output_arch_syminfo *) in_arg;
5715 stub_sec = stub_entry->stub_sec;
5717 /* Ensure this stub is attached to the current section being
5719 if (stub_sec != osi->sec)
5722 addr = (bfd_vma) stub_entry->stub_offset;
5724 stub_name = stub_entry->output_name;
5726 switch (stub_entry->stub_type)
5728 case aarch64_stub_adrp_branch:
5729 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
5730 sizeof (aarch64_adrp_branch_stub)))
5732 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
5735 case aarch64_stub_long_branch:
5736 if (!elfNN_aarch64_output_stub_sym
5737 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
5739 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
5741 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
5751 /* Output mapping symbols for linker generated sections. */
5754 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
5755 struct bfd_link_info *info,
5757 int (*func) (void *, const char *,
5760 struct elf_link_hash_entry
5763 output_arch_syminfo osi;
5764 struct elf_aarch64_link_hash_table *htab;
5766 htab = elf_aarch64_hash_table (info);
5772 /* Long calls stubs. */
5773 if (htab->stub_bfd && htab->stub_bfd->sections)
5777 for (stub_sec = htab->stub_bfd->sections;
5778 stub_sec != NULL; stub_sec = stub_sec->next)
5780 /* Ignore non-stub sections. */
5781 if (!strstr (stub_sec->name, STUB_SUFFIX))
5786 osi.sec_shndx = _bfd_elf_section_from_bfd_section
5787 (output_bfd, osi.sec->output_section);
5789 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
5794 /* Finally, output mapping symbols for the PLT. */
5795 if (!htab->root.splt || htab->root.splt->size == 0)
5798 /* For now live without mapping symbols for the plt. */
5799 osi.sec_shndx = _bfd_elf_section_from_bfd_section
5800 (output_bfd, htab->root.splt->output_section);
5801 osi.sec = htab->root.splt;
5803 elf_link_hash_traverse (&htab->root, elfNN_aarch64_output_plt_map,
5810 /* Allocate target specific section data. */
5813 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
5815 if (!sec->used_by_bfd)
5817 _aarch64_elf_section_data *sdata;
5818 bfd_size_type amt = sizeof (*sdata);
5820 sdata = bfd_zalloc (abfd, amt);
5823 sec->used_by_bfd = sdata;
5826 record_section_with_aarch64_elf_section_data (sec);
5828 return _bfd_elf_new_section_hook (abfd, sec);
5833 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
5835 void *ignore ATTRIBUTE_UNUSED)
5837 unrecord_section_with_aarch64_elf_section_data (sec);
5841 elfNN_aarch64_close_and_cleanup (bfd *abfd)
5844 bfd_map_over_sections (abfd,
5845 unrecord_section_via_map_over_sections, NULL);
5847 return _bfd_elf_close_and_cleanup (abfd);
5851 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
5854 bfd_map_over_sections (abfd,
5855 unrecord_section_via_map_over_sections, NULL);
5857 return _bfd_free_cached_info (abfd);
5860 /* Create dynamic sections. This is different from the ARM backend in that
5861 the got, plt, gotplt and their relocation sections are all created in the
5862 standard part of the bfd elf backend. */
5865 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
5866 struct bfd_link_info *info)
5868 struct elf_aarch64_link_hash_table *htab;
5870 /* We need to create .got section. */
5871 if (!aarch64_elf_create_got_section (dynobj, info))
5874 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
5877 htab = elf_aarch64_hash_table (info);
5878 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
5880 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
5882 if (!htab->sdynbss || (!info->shared && !htab->srelbss))
5889 /* Allocate space in .plt, .got and associated reloc sections for
5893 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
5895 struct bfd_link_info *info;
5896 struct elf_aarch64_link_hash_table *htab;
5897 struct elf_aarch64_link_hash_entry *eh;
5898 struct elf_dyn_relocs *p;
5900 /* An example of a bfd_link_hash_indirect symbol is versioned
5901 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
5902 -> __gxx_personality_v0(bfd_link_hash_defined)
5904 There is no need to process bfd_link_hash_indirect symbols here
5905 because we will also be presented with the concrete instance of
5906 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
5907 called to copy all relevant data from the generic to the concrete
5910 if (h->root.type == bfd_link_hash_indirect)
5913 if (h->root.type == bfd_link_hash_warning)
5914 h = (struct elf_link_hash_entry *) h->root.u.i.link;
5916 info = (struct bfd_link_info *) inf;
5917 htab = elf_aarch64_hash_table (info);
5919 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
5920 here if it is defined and referenced in a non-shared object. */
5921 if (h->type == STT_GNU_IFUNC
5924 else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
5926 /* Make sure this symbol is output as a dynamic symbol.
5927 Undefined weak syms won't yet be marked as dynamic. */
5928 if (h->dynindx == -1 && !h->forced_local)
5930 if (!bfd_elf_link_record_dynamic_symbol (info, h))
5934 if (info->shared || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
5936 asection *s = htab->root.splt;
5938 /* If this is the first .plt entry, make room for the special
5941 s->size += htab->plt_header_size;
5943 h->plt.offset = s->size;
5945 /* If this symbol is not defined in a regular file, and we are
5946 not generating a shared library, then set the symbol to this
5947 location in the .plt. This is required to make function
5948 pointers compare as equal between the normal executable and
5949 the shared library. */
5950 if (!info->shared && !h->def_regular)
5952 h->root.u.def.section = s;
5953 h->root.u.def.value = h->plt.offset;
5956 /* Make room for this entry. For now we only create the
5957 small model PLT entries. We later need to find a way
5958 of relaxing into these from the large model PLT entries. */
5959 s->size += PLT_SMALL_ENTRY_SIZE;
5961 /* We also need to make an entry in the .got.plt section, which
5962 will be placed in the .got section by the linker script. */
5963 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
5965 /* We also need to make an entry in the .rela.plt section. */
5966 htab->root.srelplt->size += RELOC_SIZE (htab);
5968 /* We need to ensure that all GOT entries that serve the PLT
5969 are consecutive with the special GOT slots [0] [1] and
5970 [2]. Any addtional relocations, such as
5971 R_AARCH64_TLSDESC, must be placed after the PLT related
5972 entries. We abuse the reloc_count such that during
5973 sizing we adjust reloc_count to indicate the number of
5974 PLT related reserved entries. In subsequent phases when
5975 filling in the contents of the reloc entries, PLT related
5976 entries are placed by computing their PLT index (0
5977 .. reloc_count). While other none PLT relocs are placed
5978 at the slot indicated by reloc_count and reloc_count is
5981 htab->root.srelplt->reloc_count++;
5985 h->plt.offset = (bfd_vma) - 1;
5991 h->plt.offset = (bfd_vma) - 1;
5995 eh = (struct elf_aarch64_link_hash_entry *) h;
5996 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
5998 if (h->got.refcount > 0)
6001 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
6003 h->got.offset = (bfd_vma) - 1;
6005 dyn = htab->root.dynamic_sections_created;
6007 /* Make sure this symbol is output as a dynamic symbol.
6008 Undefined weak syms won't yet be marked as dynamic. */
6009 if (dyn && h->dynindx == -1 && !h->forced_local)
6011 if (!bfd_elf_link_record_dynamic_symbol (info, h))
6015 if (got_type == GOT_UNKNOWN)
6018 else if (got_type == GOT_NORMAL)
6020 h->got.offset = htab->root.sgot->size;
6021 htab->root.sgot->size += GOT_ENTRY_SIZE;
6022 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6023 || h->root.type != bfd_link_hash_undefweak)
6025 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6027 htab->root.srelgot->size += RELOC_SIZE (htab);
6033 if (got_type & GOT_TLSDESC_GD)
6035 eh->tlsdesc_got_jump_table_offset =
6036 (htab->root.sgotplt->size
6037 - aarch64_compute_jump_table_size (htab));
6038 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
6039 h->got.offset = (bfd_vma) - 2;
6042 if (got_type & GOT_TLS_GD)
6044 h->got.offset = htab->root.sgot->size;
6045 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
6048 if (got_type & GOT_TLS_IE)
6050 h->got.offset = htab->root.sgot->size;
6051 htab->root.sgot->size += GOT_ENTRY_SIZE;
6054 indx = h && h->dynindx != -1 ? h->dynindx : 0;
6055 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6056 || h->root.type != bfd_link_hash_undefweak)
6059 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
6061 if (got_type & GOT_TLSDESC_GD)
6063 htab->root.srelplt->size += RELOC_SIZE (htab);
6064 /* Note reloc_count not incremented here! We have
6065 already adjusted reloc_count for this relocation
6068 /* TLSDESC PLT is now needed, but not yet determined. */
6069 htab->tlsdesc_plt = (bfd_vma) - 1;
6072 if (got_type & GOT_TLS_GD)
6073 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
6075 if (got_type & GOT_TLS_IE)
6076 htab->root.srelgot->size += RELOC_SIZE (htab);
6082 h->got.offset = (bfd_vma) - 1;
6085 if (eh->dyn_relocs == NULL)
6088 /* In the shared -Bsymbolic case, discard space allocated for
6089 dynamic pc-relative relocs against symbols which turn out to be
6090 defined in regular objects. For the normal shared case, discard
6091 space for pc-relative relocs that have become local due to symbol
6092 visibility changes. */
6096 /* Relocs that use pc_count are those that appear on a call
6097 insn, or certain REL relocs that can generated via assembly.
6098 We want calls to protected symbols to resolve directly to the
6099 function rather than going via the plt. If people want
6100 function pointer comparisons to work as expected then they
6101 should avoid writing weird assembly. */
6102 if (SYMBOL_CALLS_LOCAL (info, h))
6104 struct elf_dyn_relocs **pp;
6106 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
6108 p->count -= p->pc_count;
6117 /* Also discard relocs on undefined weak syms with non-default
6119 if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
6121 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6122 eh->dyn_relocs = NULL;
6124 /* Make sure undefined weak symbols are output as a dynamic
6126 else if (h->dynindx == -1
6128 && !bfd_elf_link_record_dynamic_symbol (info, h))
6133 else if (ELIMINATE_COPY_RELOCS)
6135 /* For the non-shared case, discard space for relocs against
6136 symbols which turn out to need copy relocs or are not
6142 || (htab->root.dynamic_sections_created
6143 && (h->root.type == bfd_link_hash_undefweak
6144 || h->root.type == bfd_link_hash_undefined))))
6146 /* Make sure this symbol is output as a dynamic symbol.
6147 Undefined weak syms won't yet be marked as dynamic. */
6148 if (h->dynindx == -1
6150 && !bfd_elf_link_record_dynamic_symbol (info, h))
6153 /* If that succeeded, we know we'll be keeping all the
6155 if (h->dynindx != -1)
6159 eh->dyn_relocs = NULL;
6164 /* Finally, allocate space. */
6165 for (p = eh->dyn_relocs; p != NULL; p = p->next)
6169 sreloc = elf_section_data (p->sec)->sreloc;
6171 BFD_ASSERT (sreloc != NULL);
6173 sreloc->size += p->count * RELOC_SIZE (htab);
6179 /* Allocate space in .plt, .got and associated reloc sections for
6180 ifunc dynamic relocs. */
6183 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
6186 struct bfd_link_info *info;
6187 struct elf_aarch64_link_hash_table *htab;
6188 struct elf_aarch64_link_hash_entry *eh;
6190 /* An example of a bfd_link_hash_indirect symbol is versioned
6191 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
6192 -> __gxx_personality_v0(bfd_link_hash_defined)
6194 There is no need to process bfd_link_hash_indirect symbols here
6195 because we will also be presented with the concrete instance of
6196 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
6197 called to copy all relevant data from the generic to the concrete
6200 if (h->root.type == bfd_link_hash_indirect)
6203 if (h->root.type == bfd_link_hash_warning)
6204 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6206 info = (struct bfd_link_info *) inf;
6207 htab = elf_aarch64_hash_table (info);
6209 eh = (struct elf_aarch64_link_hash_entry *) h;
6211 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
6212 here if it is defined and referenced in a non-shared object. */
6213 if (h->type == STT_GNU_IFUNC
6215 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
6217 htab->plt_entry_size,
6218 htab->plt_header_size,
6223 /* Allocate space in .plt, .got and associated reloc sections for
6224 local dynamic relocs. */
6227 elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
6229 struct elf_link_hash_entry *h
6230 = (struct elf_link_hash_entry *) *slot;
6232 if (h->type != STT_GNU_IFUNC
6236 || h->root.type != bfd_link_hash_defined)
6239 return elfNN_aarch64_allocate_dynrelocs (h, inf);
6242 /* Allocate space in .plt, .got and associated reloc sections for
6243 local ifunc dynamic relocs. */
6246 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
6248 struct elf_link_hash_entry *h
6249 = (struct elf_link_hash_entry *) *slot;
6251 if (h->type != STT_GNU_IFUNC
6255 || h->root.type != bfd_link_hash_defined)
6258 return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
6261 /* This is the most important function of all . Innocuosly named
6264 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
6265 struct bfd_link_info *info)
6267 struct elf_aarch64_link_hash_table *htab;
6273 htab = elf_aarch64_hash_table ((info));
6274 dynobj = htab->root.dynobj;
6276 BFD_ASSERT (dynobj != NULL);
6278 if (htab->root.dynamic_sections_created)
6280 if (info->executable)
6282 s = bfd_get_linker_section (dynobj, ".interp");
6285 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
6286 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
6290 /* Set up .got offsets for local syms, and space for local dynamic
6292 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
6294 struct elf_aarch64_local_symbol *locals = NULL;
6295 Elf_Internal_Shdr *symtab_hdr;
6299 if (!is_aarch64_elf (ibfd))
6302 for (s = ibfd->sections; s != NULL; s = s->next)
6304 struct elf_dyn_relocs *p;
6306 for (p = (struct elf_dyn_relocs *)
6307 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
6309 if (!bfd_is_abs_section (p->sec)
6310 && bfd_is_abs_section (p->sec->output_section))
6312 /* Input section has been discarded, either because
6313 it is a copy of a linkonce section or due to
6314 linker script /DISCARD/, so we'll be discarding
6317 else if (p->count != 0)
6319 srel = elf_section_data (p->sec)->sreloc;
6320 srel->size += p->count * RELOC_SIZE (htab);
6321 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
6322 info->flags |= DF_TEXTREL;
6327 locals = elf_aarch64_locals (ibfd);
6331 symtab_hdr = &elf_symtab_hdr (ibfd);
6332 srel = htab->root.srelgot;
6333 for (i = 0; i < symtab_hdr->sh_info; i++)
6335 locals[i].got_offset = (bfd_vma) - 1;
6336 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
6337 if (locals[i].got_refcount > 0)
6339 unsigned got_type = locals[i].got_type;
6340 if (got_type & GOT_TLSDESC_GD)
6342 locals[i].tlsdesc_got_jump_table_offset =
6343 (htab->root.sgotplt->size
6344 - aarch64_compute_jump_table_size (htab));
6345 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
6346 locals[i].got_offset = (bfd_vma) - 2;
6349 if (got_type & GOT_TLS_GD)
6351 locals[i].got_offset = htab->root.sgot->size;
6352 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
6355 if (got_type & GOT_TLS_IE)
6357 locals[i].got_offset = htab->root.sgot->size;
6358 htab->root.sgot->size += GOT_ENTRY_SIZE;
6361 if (got_type == GOT_UNKNOWN)
6365 if (got_type == GOT_NORMAL)
6371 if (got_type & GOT_TLSDESC_GD)
6373 htab->root.srelplt->size += RELOC_SIZE (htab);
6374 /* Note RELOC_COUNT not incremented here! */
6375 htab->tlsdesc_plt = (bfd_vma) - 1;
6378 if (got_type & GOT_TLS_GD)
6379 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
6381 if (got_type & GOT_TLS_IE)
6382 htab->root.srelgot->size += RELOC_SIZE (htab);
6387 locals[i].got_refcount = (bfd_vma) - 1;
6393 /* Allocate global sym .plt and .got entries, and space for global
6394 sym dynamic relocs. */
6395 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
6398 /* Allocate global ifunc sym .plt and .got entries, and space for global
6399 ifunc sym dynamic relocs. */
6400 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
6403 /* Allocate .plt and .got entries, and space for local symbols. */
6404 htab_traverse (htab->loc_hash_table,
6405 elfNN_aarch64_allocate_local_dynrelocs,
6408 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
6409 htab_traverse (htab->loc_hash_table,
6410 elfNN_aarch64_allocate_local_ifunc_dynrelocs,
6413 /* For every jump slot reserved in the sgotplt, reloc_count is
6414 incremented. However, when we reserve space for TLS descriptors,
6415 it's not incremented, so in order to compute the space reserved
6416 for them, it suffices to multiply the reloc count by the jump
6419 if (htab->root.srelplt)
6420 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
6422 if (htab->tlsdesc_plt)
6424 if (htab->root.splt->size == 0)
6425 htab->root.splt->size += PLT_ENTRY_SIZE;
6427 htab->tlsdesc_plt = htab->root.splt->size;
6428 htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
6430 /* If we're not using lazy TLS relocations, don't generate the
6431 GOT entry required. */
6432 if (!(info->flags & DF_BIND_NOW))
6434 htab->dt_tlsdesc_got = htab->root.sgot->size;
6435 htab->root.sgot->size += GOT_ENTRY_SIZE;
6439 /* We now have determined the sizes of the various dynamic sections.
6440 Allocate memory for them. */
6442 for (s = dynobj->sections; s != NULL; s = s->next)
6444 if ((s->flags & SEC_LINKER_CREATED) == 0)
6447 if (s == htab->root.splt
6448 || s == htab->root.sgot
6449 || s == htab->root.sgotplt
6450 || s == htab->root.iplt
6451 || s == htab->root.igotplt || s == htab->sdynbss)
6453 /* Strip this section if we don't need it; see the
6456 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
6458 if (s->size != 0 && s != htab->root.srelplt)
6461 /* We use the reloc_count field as a counter if we need
6462 to copy relocs into the output file. */
6463 if (s != htab->root.srelplt)
6468 /* It's not one of our sections, so don't allocate space. */
6474 /* If we don't need this section, strip it from the
6475 output file. This is mostly to handle .rela.bss and
6476 .rela.plt. We must create both sections in
6477 create_dynamic_sections, because they must be created
6478 before the linker maps input sections to output
6479 sections. The linker does that before
6480 adjust_dynamic_symbol is called, and it is that
6481 function which decides whether anything needs to go
6482 into these sections. */
6484 s->flags |= SEC_EXCLUDE;
6488 if ((s->flags & SEC_HAS_CONTENTS) == 0)
6491 /* Allocate memory for the section contents. We use bfd_zalloc
6492 here in case unused entries are not reclaimed before the
6493 section's contents are written out. This should not happen,
6494 but this way if it does, we get a R_AARCH64_NONE reloc instead
6496 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
6497 if (s->contents == NULL)
6501 if (htab->root.dynamic_sections_created)
6503 /* Add some entries to the .dynamic section. We fill in the
6504 values later, in elfNN_aarch64_finish_dynamic_sections, but we
6505 must add the entries now so that we get the correct size for
6506 the .dynamic section. The DT_DEBUG entry is filled in by the
6507 dynamic linker and used by the debugger. */
6508 #define add_dynamic_entry(TAG, VAL) \
6509 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
6511 if (info->executable)
6513 if (!add_dynamic_entry (DT_DEBUG, 0))
6517 if (htab->root.splt->size != 0)
6519 if (!add_dynamic_entry (DT_PLTGOT, 0)
6520 || !add_dynamic_entry (DT_PLTRELSZ, 0)
6521 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
6522 || !add_dynamic_entry (DT_JMPREL, 0))
6525 if (htab->tlsdesc_plt
6526 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
6527 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
6533 if (!add_dynamic_entry (DT_RELA, 0)
6534 || !add_dynamic_entry (DT_RELASZ, 0)
6535 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
6538 /* If any dynamic relocs apply to a read-only section,
6539 then we need a DT_TEXTREL entry. */
6540 if ((info->flags & DF_TEXTREL) != 0)
6542 if (!add_dynamic_entry (DT_TEXTREL, 0))
6547 #undef add_dynamic_entry
6553 elf_aarch64_update_plt_entry (bfd *output_bfd,
6554 bfd_reloc_code_real_type r_type,
6555 bfd_byte *plt_entry, bfd_vma value)
6557 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
6559 _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
6563 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
6564 struct elf_aarch64_link_hash_table
6565 *htab, bfd *output_bfd,
6566 struct bfd_link_info *info)
6568 bfd_byte *plt_entry;
6571 bfd_vma gotplt_entry_address;
6572 bfd_vma plt_entry_address;
6573 Elf_Internal_Rela rela;
6575 asection *plt, *gotplt, *relplt;
6577 /* When building a static executable, use .iplt, .igot.plt and
6578 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6579 if (htab->root.splt != NULL)
6581 plt = htab->root.splt;
6582 gotplt = htab->root.sgotplt;
6583 relplt = htab->root.srelplt;
6587 plt = htab->root.iplt;
6588 gotplt = htab->root.igotplt;
6589 relplt = htab->root.irelplt;
6592 /* Get the index in the procedure linkage table which
6593 corresponds to this symbol. This is the index of this symbol
6594 in all the symbols for which we are making plt entries. The
6595 first entry in the procedure linkage table is reserved.
6597 Get the offset into the .got table of the entry that
6598 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
6599 bytes. The first three are reserved for the dynamic linker.
6601 For static executables, we don't reserve anything. */
6603 if (plt == htab->root.splt)
6605 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
6606 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
6610 plt_index = h->plt.offset / htab->plt_entry_size;
6611 got_offset = plt_index * GOT_ENTRY_SIZE;
6614 plt_entry = plt->contents + h->plt.offset;
6615 plt_entry_address = plt->output_section->vma
6616 + plt->output_offset + h->plt.offset;
6617 gotplt_entry_address = gotplt->output_section->vma +
6618 gotplt->output_offset + got_offset;
6620 /* Copy in the boiler-plate for the PLTn entry. */
6621 memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
6623 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
6624 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
6625 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
6627 PG (gotplt_entry_address) -
6628 PG (plt_entry_address));
6630 /* Fill in the lo12 bits for the load from the pltgot. */
6631 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
6633 PG_OFFSET (gotplt_entry_address));
6635 /* Fill in the lo12 bits for the add from the pltgot entry. */
6636 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
6638 PG_OFFSET (gotplt_entry_address));
6640 /* All the GOTPLT Entries are essentially initialized to PLT0. */
6641 bfd_put_NN (output_bfd,
6642 plt->output_section->vma + plt->output_offset,
6643 gotplt->contents + got_offset);
6645 rela.r_offset = gotplt_entry_address;
6647 if (h->dynindx == -1
6648 || ((info->executable
6649 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
6651 && h->type == STT_GNU_IFUNC))
6653 /* If an STT_GNU_IFUNC symbol is locally defined, generate
6654 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
6655 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
6656 rela.r_addend = (h->root.u.def.value
6657 + h->root.u.def.section->output_section->vma
6658 + h->root.u.def.section->output_offset);
6662 /* Fill in the entry in the .rela.plt section. */
6663 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
6667 /* Compute the relocation entry to used based on PLT index and do
6668 not adjust reloc_count. The reloc_count has already been adjusted
6669 to account for this entry. */
6670 loc = relplt->contents + plt_index * RELOC_SIZE (htab);
6671 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6674 /* Size sections even though they're not dynamic. We use it to setup
6675 _TLS_MODULE_BASE_, if needed. */
6678 elfNN_aarch64_always_size_sections (bfd *output_bfd,
6679 struct bfd_link_info *info)
6683 if (info->relocatable)
6686 tls_sec = elf_hash_table (info)->tls_sec;
6690 struct elf_link_hash_entry *tlsbase;
6692 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
6693 "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
6697 struct bfd_link_hash_entry *h = NULL;
6698 const struct elf_backend_data *bed =
6699 get_elf_backend_data (output_bfd);
6701 if (!(_bfd_generic_link_add_one_symbol
6702 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
6703 tls_sec, 0, NULL, FALSE, bed->collect, &h)))
6706 tlsbase->type = STT_TLS;
6707 tlsbase = (struct elf_link_hash_entry *) h;
6708 tlsbase->def_regular = 1;
6709 tlsbase->other = STV_HIDDEN;
6710 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
6717 /* Finish up dynamic symbol handling. We set the contents of various
6718 dynamic sections here. */
6720 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
6721 struct bfd_link_info *info,
6722 struct elf_link_hash_entry *h,
6723 Elf_Internal_Sym *sym)
6725 struct elf_aarch64_link_hash_table *htab;
6726 htab = elf_aarch64_hash_table (info);
6728 if (h->plt.offset != (bfd_vma) - 1)
6730 asection *plt, *gotplt, *relplt;
6732 /* This symbol has an entry in the procedure linkage table. Set
6735 /* When building a static executable, use .iplt, .igot.plt and
6736 .rela.iplt sections for STT_GNU_IFUNC symbols. */
6737 if (htab->root.splt != NULL)
6739 plt = htab->root.splt;
6740 gotplt = htab->root.sgotplt;
6741 relplt = htab->root.srelplt;
6745 plt = htab->root.iplt;
6746 gotplt = htab->root.igotplt;
6747 relplt = htab->root.irelplt;
6750 /* This symbol has an entry in the procedure linkage table. Set
6752 if ((h->dynindx == -1
6753 && !((h->forced_local || info->executable)
6755 && h->type == STT_GNU_IFUNC))
6761 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
6762 if (!h->def_regular)
6764 /* Mark the symbol as undefined, rather than as defined in
6765 the .plt section. Leave the value alone. This is a clue
6766 for the dynamic linker, to make function pointer
6767 comparisons work between an application and shared
6769 sym->st_shndx = SHN_UNDEF;
6773 if (h->got.offset != (bfd_vma) - 1
6774 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL)
6776 Elf_Internal_Rela rela;
6779 /* This symbol has an entry in the global offset table. Set it
6781 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
6784 rela.r_offset = (htab->root.sgot->output_section->vma
6785 + htab->root.sgot->output_offset
6786 + (h->got.offset & ~(bfd_vma) 1));
6789 && h->type == STT_GNU_IFUNC)
6793 /* Generate R_AARCH64_GLOB_DAT. */
6800 if (!h->pointer_equality_needed)
6803 /* For non-shared object, we can't use .got.plt, which
6804 contains the real function address if we need pointer
6805 equality. We load the GOT entry with the PLT entry. */
6806 plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
6807 bfd_put_NN (output_bfd, (plt->output_section->vma
6808 + plt->output_offset
6810 htab->root.sgot->contents
6811 + (h->got.offset & ~(bfd_vma) 1));
6815 else if (info->shared && SYMBOL_REFERENCES_LOCAL (info, h))
6817 if (!h->def_regular)
6820 BFD_ASSERT ((h->got.offset & 1) != 0);
6821 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
6822 rela.r_addend = (h->root.u.def.value
6823 + h->root.u.def.section->output_section->vma
6824 + h->root.u.def.section->output_offset);
6829 BFD_ASSERT ((h->got.offset & 1) == 0);
6830 bfd_put_NN (output_bfd, (bfd_vma) 0,
6831 htab->root.sgot->contents + h->got.offset);
6832 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
6836 loc = htab->root.srelgot->contents;
6837 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
6838 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6843 Elf_Internal_Rela rela;
6846 /* This symbol needs a copy reloc. Set it up. */
6848 if (h->dynindx == -1
6849 || (h->root.type != bfd_link_hash_defined
6850 && h->root.type != bfd_link_hash_defweak)
6851 || htab->srelbss == NULL)
6854 rela.r_offset = (h->root.u.def.value
6855 + h->root.u.def.section->output_section->vma
6856 + h->root.u.def.section->output_offset);
6857 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
6859 loc = htab->srelbss->contents;
6860 loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab);
6861 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6864 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
6865 be NULL for local symbols. */
6867 && (h == elf_hash_table (info)->hdynamic
6868 || h == elf_hash_table (info)->hgot))
6869 sym->st_shndx = SHN_ABS;
6874 /* Finish up local dynamic symbol handling. We set the contents of
6875 various dynamic sections here. */
6878 elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
6880 struct elf_link_hash_entry *h
6881 = (struct elf_link_hash_entry *) *slot;
6882 struct bfd_link_info *info
6883 = (struct bfd_link_info *) inf;
6885 return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
6890 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
6891 struct elf_aarch64_link_hash_table
6894 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
6895 small and large plts and at the minute just generates
6898 /* PLT0 of the small PLT looks like this in ELF64 -
6899 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
6900 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
6901 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
6903 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
6904 // GOTPLT entry for this.
6906 PLT0 will be slightly different in ELF32 due to different got entry
6909 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
6913 memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
6915 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
6918 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
6919 + htab->root.sgotplt->output_offset
6920 + GOT_ENTRY_SIZE * 2);
6922 plt_base = htab->root.splt->output_section->vma +
6923 htab->root.splt->output_offset;
6925 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
6926 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
6927 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
6928 htab->root.splt->contents + 4,
6929 PG (plt_got_2nd_ent) - PG (plt_base + 4));
6931 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
6932 htab->root.splt->contents + 8,
6933 PG_OFFSET (plt_got_2nd_ent));
6935 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
6936 htab->root.splt->contents + 12,
6937 PG_OFFSET (plt_got_2nd_ent));
6941 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
6942 struct bfd_link_info *info)
6944 struct elf_aarch64_link_hash_table *htab;
6948 htab = elf_aarch64_hash_table (info);
6949 dynobj = htab->root.dynobj;
6950 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
6952 if (htab->root.dynamic_sections_created)
6954 ElfNN_External_Dyn *dyncon, *dynconend;
6956 if (sdyn == NULL || htab->root.sgot == NULL)
6959 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
6960 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
6961 for (; dyncon < dynconend; dyncon++)
6963 Elf_Internal_Dyn dyn;
6966 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
6974 s = htab->root.sgotplt;
6975 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6979 dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma;
6983 s = htab->root.srelplt;
6984 dyn.d_un.d_val = s->size;
6988 /* The procedure linkage table relocs (DT_JMPREL) should
6989 not be included in the overall relocs (DT_RELA).
6990 Therefore, we override the DT_RELASZ entry here to
6991 make it not include the JMPREL relocs. Since the
6992 linker script arranges for .rela.plt to follow all
6993 other relocation sections, we don't have to worry
6994 about changing the DT_RELA entry. */
6995 if (htab->root.srelplt != NULL)
6997 s = htab->root.srelplt;
6998 dyn.d_un.d_val -= s->size;
7002 case DT_TLSDESC_PLT:
7003 s = htab->root.splt;
7004 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
7005 + htab->tlsdesc_plt;
7008 case DT_TLSDESC_GOT:
7009 s = htab->root.sgot;
7010 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
7011 + htab->dt_tlsdesc_got;
7015 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
7020 /* Fill in the special first entry in the procedure linkage table. */
7021 if (htab->root.splt && htab->root.splt->size > 0)
7023 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
7025 elf_section_data (htab->root.splt->output_section)->
7026 this_hdr.sh_entsize = htab->plt_entry_size;
7029 if (htab->tlsdesc_plt)
7031 bfd_put_NN (output_bfd, (bfd_vma) 0,
7032 htab->root.sgot->contents + htab->dt_tlsdesc_got);
7034 memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
7035 elfNN_aarch64_tlsdesc_small_plt_entry,
7036 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
7039 bfd_vma adrp1_addr =
7040 htab->root.splt->output_section->vma
7041 + htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
7043 bfd_vma adrp2_addr = adrp1_addr + 4;
7046 htab->root.sgot->output_section->vma
7047 + htab->root.sgot->output_offset;
7049 bfd_vma pltgot_addr =
7050 htab->root.sgotplt->output_section->vma
7051 + htab->root.sgotplt->output_offset;
7053 bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
7055 bfd_byte *plt_entry =
7056 htab->root.splt->contents + htab->tlsdesc_plt;
7058 /* adrp x2, DT_TLSDESC_GOT */
7059 elf_aarch64_update_plt_entry (output_bfd,
7060 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7062 (PG (dt_tlsdesc_got)
7063 - PG (adrp1_addr)));
7066 elf_aarch64_update_plt_entry (output_bfd,
7067 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
7070 - PG (adrp2_addr)));
7072 /* ldr x2, [x2, #0] */
7073 elf_aarch64_update_plt_entry (output_bfd,
7074 BFD_RELOC_AARCH64_LDSTNN_LO12,
7076 PG_OFFSET (dt_tlsdesc_got));
7079 elf_aarch64_update_plt_entry (output_bfd,
7080 BFD_RELOC_AARCH64_ADD_LO12,
7082 PG_OFFSET (pltgot_addr));
7087 if (htab->root.sgotplt)
7089 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
7091 (*_bfd_error_handler)
7092 (_("discarded output section: `%A'"), htab->root.sgotplt);
7096 /* Fill in the first three entries in the global offset table. */
7097 if (htab->root.sgotplt->size > 0)
7099 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
7101 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
7102 bfd_put_NN (output_bfd,
7104 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
7105 bfd_put_NN (output_bfd,
7107 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
7110 if (htab->root.sgot)
7112 if (htab->root.sgot->size > 0)
7115 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
7116 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
7120 elf_section_data (htab->root.sgotplt->output_section)->
7121 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
7124 if (htab->root.sgot && htab->root.sgot->size > 0)
7125 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
7128 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
7129 htab_traverse (htab->loc_hash_table,
7130 elfNN_aarch64_finish_local_dynamic_symbol,
7136 /* Return address for Ith PLT stub in section PLT, for relocation REL
7137 or (bfd_vma) -1 if it should not be included. */
7140 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
7141 const arelent *rel ATTRIBUTE_UNUSED)
7143 return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
7147 /* We use this so we can override certain functions
7148 (though currently we don't). */
7150 const struct elf_size_info elfNN_aarch64_size_info =
7152 sizeof (ElfNN_External_Ehdr),
7153 sizeof (ElfNN_External_Phdr),
7154 sizeof (ElfNN_External_Shdr),
7155 sizeof (ElfNN_External_Rel),
7156 sizeof (ElfNN_External_Rela),
7157 sizeof (ElfNN_External_Sym),
7158 sizeof (ElfNN_External_Dyn),
7159 sizeof (Elf_External_Note),
7160 4, /* Hash table entry size. */
7161 1, /* Internal relocs per external relocs. */
7162 ARCH_SIZE, /* Arch size. */
7163 LOG_FILE_ALIGN, /* Log_file_align. */
7164 ELFCLASSNN, EV_CURRENT,
7165 bfd_elfNN_write_out_phdrs,
7166 bfd_elfNN_write_shdrs_and_ehdr,
7167 bfd_elfNN_checksum_contents,
7168 bfd_elfNN_write_relocs,
7169 bfd_elfNN_swap_symbol_in,
7170 bfd_elfNN_swap_symbol_out,
7171 bfd_elfNN_slurp_reloc_table,
7172 bfd_elfNN_slurp_symbol_table,
7173 bfd_elfNN_swap_dyn_in,
7174 bfd_elfNN_swap_dyn_out,
7175 bfd_elfNN_swap_reloc_in,
7176 bfd_elfNN_swap_reloc_out,
7177 bfd_elfNN_swap_reloca_in,
7178 bfd_elfNN_swap_reloca_out
7181 #define ELF_ARCH bfd_arch_aarch64
7182 #define ELF_MACHINE_CODE EM_AARCH64
7183 #define ELF_MAXPAGESIZE 0x10000
7184 #define ELF_MINPAGESIZE 0x1000
7185 #define ELF_COMMONPAGESIZE 0x1000
7187 #define bfd_elfNN_close_and_cleanup \
7188 elfNN_aarch64_close_and_cleanup
7190 #define bfd_elfNN_bfd_free_cached_info \
7191 elfNN_aarch64_bfd_free_cached_info
7193 #define bfd_elfNN_bfd_is_target_special_symbol \
7194 elfNN_aarch64_is_target_special_symbol
7196 #define bfd_elfNN_bfd_link_hash_table_create \
7197 elfNN_aarch64_link_hash_table_create
7199 #define bfd_elfNN_bfd_link_hash_table_free \
7200 elfNN_aarch64_hash_table_free
7202 #define bfd_elfNN_bfd_merge_private_bfd_data \
7203 elfNN_aarch64_merge_private_bfd_data
7205 #define bfd_elfNN_bfd_print_private_bfd_data \
7206 elfNN_aarch64_print_private_bfd_data
7208 #define bfd_elfNN_bfd_reloc_type_lookup \
7209 elfNN_aarch64_reloc_type_lookup
7211 #define bfd_elfNN_bfd_reloc_name_lookup \
7212 elfNN_aarch64_reloc_name_lookup
7214 #define bfd_elfNN_bfd_set_private_flags \
7215 elfNN_aarch64_set_private_flags
7217 #define bfd_elfNN_find_inliner_info \
7218 elfNN_aarch64_find_inliner_info
7220 #define bfd_elfNN_find_nearest_line \
7221 elfNN_aarch64_find_nearest_line
7223 #define bfd_elfNN_mkobject \
7224 elfNN_aarch64_mkobject
7226 #define bfd_elfNN_new_section_hook \
7227 elfNN_aarch64_new_section_hook
7229 #define elf_backend_adjust_dynamic_symbol \
7230 elfNN_aarch64_adjust_dynamic_symbol
7232 #define elf_backend_always_size_sections \
7233 elfNN_aarch64_always_size_sections
7235 #define elf_backend_check_relocs \
7236 elfNN_aarch64_check_relocs
7238 #define elf_backend_copy_indirect_symbol \
7239 elfNN_aarch64_copy_indirect_symbol
7241 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
7242 to them in our hash. */
7243 #define elf_backend_create_dynamic_sections \
7244 elfNN_aarch64_create_dynamic_sections
7246 #define elf_backend_init_index_section \
7247 _bfd_elf_init_2_index_sections
7249 #define elf_backend_finish_dynamic_sections \
7250 elfNN_aarch64_finish_dynamic_sections
7252 #define elf_backend_finish_dynamic_symbol \
7253 elfNN_aarch64_finish_dynamic_symbol
7255 #define elf_backend_gc_sweep_hook \
7256 elfNN_aarch64_gc_sweep_hook
7258 #define elf_backend_object_p \
7259 elfNN_aarch64_object_p
7261 #define elf_backend_output_arch_local_syms \
7262 elfNN_aarch64_output_arch_local_syms
7264 #define elf_backend_plt_sym_val \
7265 elfNN_aarch64_plt_sym_val
7267 #define elf_backend_post_process_headers \
7268 elfNN_aarch64_post_process_headers
7270 #define elf_backend_relocate_section \
7271 elfNN_aarch64_relocate_section
7273 #define elf_backend_reloc_type_class \
7274 elfNN_aarch64_reloc_type_class
7276 #define elf_backend_section_from_shdr \
7277 elfNN_aarch64_section_from_shdr
7279 #define elf_backend_size_dynamic_sections \
7280 elfNN_aarch64_size_dynamic_sections
7282 #define elf_backend_size_info \
7283 elfNN_aarch64_size_info
7285 #define elf_backend_can_refcount 1
7286 #define elf_backend_can_gc_sections 1
7287 #define elf_backend_plt_readonly 1
7288 #define elf_backend_want_got_plt 1
7289 #define elf_backend_want_plt_sym 0
7290 #define elf_backend_may_use_rel_p 0
7291 #define elf_backend_may_use_rela_p 1
7292 #define elf_backend_default_use_rela_p 1
7293 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
7294 #define elf_backend_default_execstack 0
7296 #undef elf_backend_obj_attrs_section
7297 #define elf_backend_obj_attrs_section ".ARM.attributes"
7299 #include "elfNN-target.h"
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