1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2015 Free Software Foundation, Inc.
3 Contributed by ARM Ltd.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not,
19 see <http://www.gnu.org/licenses/>. */
21 /* Notes on implementation:
23 Thread Local Store (TLS)
27 The implementation currently supports both traditional TLS and TLS
28 descriptors, but only general dynamic (GD).
30 For traditional TLS the assembler will present us with code
31 fragments of the form:
34 R_AARCH64_TLSGD_ADR_PAGE21(foo)
35 add x0, :tlsgd_lo12:foo
36 R_AARCH64_TLSGD_ADD_LO12_NC(foo)
40 For TLS descriptors the assembler will present us with code
41 fragments of the form:
43 adrp x0, :tlsdesc:foo R_AARCH64_TLSDESC_ADR_PAGE21(foo)
44 ldr x1, [x0, #:tlsdesc_lo12:foo] R_AARCH64_TLSDESC_LD64_LO12(foo)
45 add x0, x0, #:tlsdesc_lo12:foo R_AARCH64_TLSDESC_ADD_LO12(foo)
47 blr x1 R_AARCH64_TLSDESC_CALL(foo)
49 The relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} against foo
50 indicate that foo is thread local and should be accessed via the
51 traditional TLS mechanims.
53 The relocations R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC}
54 against foo indicate that 'foo' is thread local and should be accessed
55 via a TLS descriptor mechanism.
57 The precise instruction sequence is only relevant from the
58 perspective of linker relaxation which is currently not implemented.
60 The static linker must detect that 'foo' is a TLS object and
61 allocate a double GOT entry. The GOT entry must be created for both
62 global and local TLS symbols. Note that this is different to none
63 TLS local objects which do not need a GOT entry.
65 In the traditional TLS mechanism, the double GOT entry is used to
66 provide the tls_index structure, containing module and offset
67 entries. The static linker places the relocation R_AARCH64_TLS_DTPMOD
68 on the module entry. The loader will subsequently fixup this
69 relocation with the module identity.
71 For global traditional TLS symbols the static linker places an
72 R_AARCH64_TLS_DTPREL relocation on the offset entry. The loader
73 will subsequently fixup the offset. For local TLS symbols the static
74 linker fixes up offset.
76 In the TLS descriptor mechanism the double GOT entry is used to
77 provide the descriptor. The static linker places the relocation
78 R_AARCH64_TLSDESC on the first GOT slot. The loader will
79 subsequently fix this up.
83 The handling of TLS symbols is implemented across a number of
84 different backend functions. The following is a top level view of
85 what processing is performed where.
87 The TLS implementation maintains state information for each TLS
88 symbol. The state information for local and global symbols is kept
89 in different places. Global symbols use generic BFD structures while
90 local symbols use backend specific structures that are allocated and
91 maintained entirely by the backend.
95 elfNN_aarch64_check_relocs()
97 This function is invoked for each relocation.
99 The TLS relocations R_AARCH64_TLSGD_{ADR_PREL21,ADD_LO12_NC} and
100 R_AARCH64_TLSDESC_{ADR_PAGE21,LD64_LO12_NC,ADD_LO12_NC} are
101 spotted. One time creation of local symbol data structures are
102 created when the first local symbol is seen.
104 The reference count for a symbol is incremented. The GOT type for
105 each symbol is marked as general dynamic.
107 elfNN_aarch64_allocate_dynrelocs ()
109 For each global with positive reference count we allocate a double
110 GOT slot. For a traditional TLS symbol we allocate space for two
111 relocation entries on the GOT, for a TLS descriptor symbol we
112 allocate space for one relocation on the slot. Record the GOT offset
115 elfNN_aarch64_size_dynamic_sections ()
117 Iterate all input BFDS, look for in the local symbol data structure
118 constructed earlier for local TLS symbols and allocate them double
119 GOT slots along with space for a single GOT relocation. Update the
120 local symbol structure to record the GOT offset allocated.
122 elfNN_aarch64_relocate_section ()
124 Calls elfNN_aarch64_final_link_relocate ()
126 Emit the relevant TLS relocations against the GOT for each TLS
127 symbol. For local TLS symbols emit the GOT offset directly. The GOT
128 relocations are emitted once the first time a TLS symbol is
129 encountered. The implementation uses the LSB of the GOT offset to
130 flag that the relevant GOT relocations for a symbol have been
131 emitted. All of the TLS code that uses the GOT offset needs to take
132 care to mask out this flag bit before using the offset.
134 elfNN_aarch64_final_link_relocate ()
136 Fixup the R_AARCH64_TLSGD_{ADR_PREL21, ADD_LO12_NC} relocations. */
140 #include "libiberty.h"
142 #include "bfd_stdint.h"
145 #include "objalloc.h"
146 #include "elf/aarch64.h"
147 #include "elfxx-aarch64.h"
152 #define AARCH64_R(NAME) R_AARCH64_ ## NAME
153 #define AARCH64_R_STR(NAME) "R_AARCH64_" #NAME
154 #define HOWTO64(...) HOWTO (__VA_ARGS__)
155 #define HOWTO32(...) EMPTY_HOWTO (0)
156 #define LOG_FILE_ALIGN 3
160 #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
161 #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME
162 #define HOWTO64(...) EMPTY_HOWTO (0)
163 #define HOWTO32(...) HOWTO (__VA_ARGS__)
164 #define LOG_FILE_ALIGN 2
167 #define IS_AARCH64_TLS_RELOC(R_TYPE) \
168 ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
169 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
170 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
171 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12 \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12 \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
182 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 \
183 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12 \
184 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12 \
186 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC \
187 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12 \
188 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC \
189 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12 \
190 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC \
191 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0 \
192 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC \
193 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1 \
194 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC \
195 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2 \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
201 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
202 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
203 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
204 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
205 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
206 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
207 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
209 #define IS_AARCH64_TLS_RELAX_RELOC(R_TYPE) \
210 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
211 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
212 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
213 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
214 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
215 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC \
216 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
217 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
218 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
219 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
220 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
221 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC \
222 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
223 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
224 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21)
226 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
227 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \
228 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
229 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC \
230 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
231 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
232 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
233 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
234 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC \
235 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
236 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
237 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
238 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1)
240 #define ELIMINATE_COPY_RELOCS 0
242 /* Return size of a relocation entry. HTAB is the bfd's
243 elf_aarch64_link_hash_entry. */
244 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
246 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
247 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
248 #define PLT_ENTRY_SIZE (32)
249 #define PLT_SMALL_ENTRY_SIZE (16)
250 #define PLT_TLSDESC_ENTRY_SIZE (32)
252 /* Encoding of the nop instruction */
253 #define INSN_NOP 0xd503201f
255 #define aarch64_compute_jump_table_size(htab) \
256 (((htab)->root.srelplt == NULL) ? 0 \
257 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
259 /* The first entry in a procedure linkage table looks like this
260 if the distance between the PLTGOT and the PLT is < 4GB use
261 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
262 in x16 and needs to work out PLTGOT[1] by using an address of
263 [x16,#-GOT_ENTRY_SIZE]. */
264 static const bfd_byte elfNN_aarch64_small_plt0_entry[PLT_ENTRY_SIZE] =
266 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
267 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
269 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
270 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
272 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
273 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
275 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
276 0x1f, 0x20, 0x03, 0xd5, /* nop */
277 0x1f, 0x20, 0x03, 0xd5, /* nop */
278 0x1f, 0x20, 0x03, 0xd5, /* nop */
281 /* Per function entry in a procedure linkage table looks like this
282 if the distance between the PLTGOT and the PLT is < 4GB use
283 these PLT entries. */
284 static const bfd_byte elfNN_aarch64_small_plt_entry[PLT_SMALL_ENTRY_SIZE] =
286 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
288 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
289 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
291 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
292 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
294 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
297 static const bfd_byte
298 elfNN_aarch64_tlsdesc_small_plt_entry[PLT_TLSDESC_ENTRY_SIZE] =
300 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
301 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
302 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
304 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
305 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
307 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
308 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
310 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
311 0x1f, 0x20, 0x03, 0xd5, /* nop */
312 0x1f, 0x20, 0x03, 0xd5, /* nop */
315 #define elf_info_to_howto elfNN_aarch64_info_to_howto
316 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
318 #define AARCH64_ELF_ABI_VERSION 0
320 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
321 #define ALL_ONES (~ (bfd_vma) 0)
323 /* Indexed by the bfd interal reloc enumerators.
324 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
327 static reloc_howto_type elfNN_aarch64_howto_table[] =
331 /* Basic data relocations. */
334 HOWTO (R_AARCH64_NULL, /* type */
336 3, /* size (0 = byte, 1 = short, 2 = long) */
338 FALSE, /* pc_relative */
340 complain_overflow_dont, /* complain_on_overflow */
341 bfd_elf_generic_reloc, /* special_function */
342 "R_AARCH64_NULL", /* name */
343 FALSE, /* partial_inplace */
346 FALSE), /* pcrel_offset */
348 HOWTO (R_AARCH64_NONE, /* type */
350 3, /* size (0 = byte, 1 = short, 2 = long) */
352 FALSE, /* pc_relative */
354 complain_overflow_dont, /* complain_on_overflow */
355 bfd_elf_generic_reloc, /* special_function */
356 "R_AARCH64_NONE", /* name */
357 FALSE, /* partial_inplace */
360 FALSE), /* pcrel_offset */
364 HOWTO64 (AARCH64_R (ABS64), /* type */
366 4, /* size (4 = long long) */
368 FALSE, /* pc_relative */
370 complain_overflow_unsigned, /* complain_on_overflow */
371 bfd_elf_generic_reloc, /* special_function */
372 AARCH64_R_STR (ABS64), /* name */
373 FALSE, /* partial_inplace */
374 ALL_ONES, /* src_mask */
375 ALL_ONES, /* dst_mask */
376 FALSE), /* pcrel_offset */
379 HOWTO (AARCH64_R (ABS32), /* type */
381 2, /* size (0 = byte, 1 = short, 2 = long) */
383 FALSE, /* pc_relative */
385 complain_overflow_unsigned, /* complain_on_overflow */
386 bfd_elf_generic_reloc, /* special_function */
387 AARCH64_R_STR (ABS32), /* name */
388 FALSE, /* partial_inplace */
389 0xffffffff, /* src_mask */
390 0xffffffff, /* dst_mask */
391 FALSE), /* pcrel_offset */
394 HOWTO (AARCH64_R (ABS16), /* type */
396 1, /* size (0 = byte, 1 = short, 2 = long) */
398 FALSE, /* pc_relative */
400 complain_overflow_unsigned, /* complain_on_overflow */
401 bfd_elf_generic_reloc, /* special_function */
402 AARCH64_R_STR (ABS16), /* name */
403 FALSE, /* partial_inplace */
404 0xffff, /* src_mask */
405 0xffff, /* dst_mask */
406 FALSE), /* pcrel_offset */
408 /* .xword: (S+A-P) */
409 HOWTO64 (AARCH64_R (PREL64), /* type */
411 4, /* size (4 = long long) */
413 TRUE, /* pc_relative */
415 complain_overflow_signed, /* complain_on_overflow */
416 bfd_elf_generic_reloc, /* special_function */
417 AARCH64_R_STR (PREL64), /* name */
418 FALSE, /* partial_inplace */
419 ALL_ONES, /* src_mask */
420 ALL_ONES, /* dst_mask */
421 TRUE), /* pcrel_offset */
424 HOWTO (AARCH64_R (PREL32), /* type */
426 2, /* size (0 = byte, 1 = short, 2 = long) */
428 TRUE, /* pc_relative */
430 complain_overflow_signed, /* complain_on_overflow */
431 bfd_elf_generic_reloc, /* special_function */
432 AARCH64_R_STR (PREL32), /* name */
433 FALSE, /* partial_inplace */
434 0xffffffff, /* src_mask */
435 0xffffffff, /* dst_mask */
436 TRUE), /* pcrel_offset */
439 HOWTO (AARCH64_R (PREL16), /* type */
441 1, /* size (0 = byte, 1 = short, 2 = long) */
443 TRUE, /* pc_relative */
445 complain_overflow_signed, /* complain_on_overflow */
446 bfd_elf_generic_reloc, /* special_function */
447 AARCH64_R_STR (PREL16), /* name */
448 FALSE, /* partial_inplace */
449 0xffff, /* src_mask */
450 0xffff, /* dst_mask */
451 TRUE), /* pcrel_offset */
453 /* Group relocations to create a 16, 32, 48 or 64 bit
454 unsigned data or abs address inline. */
456 /* MOVZ: ((S+A) >> 0) & 0xffff */
457 HOWTO (AARCH64_R (MOVW_UABS_G0), /* type */
459 2, /* size (0 = byte, 1 = short, 2 = long) */
461 FALSE, /* pc_relative */
463 complain_overflow_unsigned, /* complain_on_overflow */
464 bfd_elf_generic_reloc, /* special_function */
465 AARCH64_R_STR (MOVW_UABS_G0), /* name */
466 FALSE, /* partial_inplace */
467 0xffff, /* src_mask */
468 0xffff, /* dst_mask */
469 FALSE), /* pcrel_offset */
471 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
472 HOWTO (AARCH64_R (MOVW_UABS_G0_NC), /* type */
474 2, /* size (0 = byte, 1 = short, 2 = long) */
476 FALSE, /* pc_relative */
478 complain_overflow_dont, /* complain_on_overflow */
479 bfd_elf_generic_reloc, /* special_function */
480 AARCH64_R_STR (MOVW_UABS_G0_NC), /* name */
481 FALSE, /* partial_inplace */
482 0xffff, /* src_mask */
483 0xffff, /* dst_mask */
484 FALSE), /* pcrel_offset */
486 /* MOVZ: ((S+A) >> 16) & 0xffff */
487 HOWTO (AARCH64_R (MOVW_UABS_G1), /* type */
489 2, /* size (0 = byte, 1 = short, 2 = long) */
491 FALSE, /* pc_relative */
493 complain_overflow_unsigned, /* complain_on_overflow */
494 bfd_elf_generic_reloc, /* special_function */
495 AARCH64_R_STR (MOVW_UABS_G1), /* name */
496 FALSE, /* partial_inplace */
497 0xffff, /* src_mask */
498 0xffff, /* dst_mask */
499 FALSE), /* pcrel_offset */
501 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
502 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC), /* type */
504 2, /* size (0 = byte, 1 = short, 2 = long) */
506 FALSE, /* pc_relative */
508 complain_overflow_dont, /* complain_on_overflow */
509 bfd_elf_generic_reloc, /* special_function */
510 AARCH64_R_STR (MOVW_UABS_G1_NC), /* name */
511 FALSE, /* partial_inplace */
512 0xffff, /* src_mask */
513 0xffff, /* dst_mask */
514 FALSE), /* pcrel_offset */
516 /* MOVZ: ((S+A) >> 32) & 0xffff */
517 HOWTO64 (AARCH64_R (MOVW_UABS_G2), /* type */
519 2, /* size (0 = byte, 1 = short, 2 = long) */
521 FALSE, /* pc_relative */
523 complain_overflow_unsigned, /* complain_on_overflow */
524 bfd_elf_generic_reloc, /* special_function */
525 AARCH64_R_STR (MOVW_UABS_G2), /* name */
526 FALSE, /* partial_inplace */
527 0xffff, /* src_mask */
528 0xffff, /* dst_mask */
529 FALSE), /* pcrel_offset */
531 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
532 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC), /* type */
534 2, /* size (0 = byte, 1 = short, 2 = long) */
536 FALSE, /* pc_relative */
538 complain_overflow_dont, /* complain_on_overflow */
539 bfd_elf_generic_reloc, /* special_function */
540 AARCH64_R_STR (MOVW_UABS_G2_NC), /* name */
541 FALSE, /* partial_inplace */
542 0xffff, /* src_mask */
543 0xffff, /* dst_mask */
544 FALSE), /* pcrel_offset */
546 /* MOVZ: ((S+A) >> 48) & 0xffff */
547 HOWTO64 (AARCH64_R (MOVW_UABS_G3), /* type */
549 2, /* size (0 = byte, 1 = short, 2 = long) */
551 FALSE, /* pc_relative */
553 complain_overflow_unsigned, /* complain_on_overflow */
554 bfd_elf_generic_reloc, /* special_function */
555 AARCH64_R_STR (MOVW_UABS_G3), /* name */
556 FALSE, /* partial_inplace */
557 0xffff, /* src_mask */
558 0xffff, /* dst_mask */
559 FALSE), /* pcrel_offset */
561 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
562 signed data or abs address inline. Will change instruction
563 to MOVN or MOVZ depending on sign of calculated value. */
565 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
566 HOWTO (AARCH64_R (MOVW_SABS_G0), /* type */
568 2, /* size (0 = byte, 1 = short, 2 = long) */
570 FALSE, /* pc_relative */
572 complain_overflow_signed, /* complain_on_overflow */
573 bfd_elf_generic_reloc, /* special_function */
574 AARCH64_R_STR (MOVW_SABS_G0), /* name */
575 FALSE, /* partial_inplace */
576 0xffff, /* src_mask */
577 0xffff, /* dst_mask */
578 FALSE), /* pcrel_offset */
580 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
581 HOWTO64 (AARCH64_R (MOVW_SABS_G1), /* type */
583 2, /* size (0 = byte, 1 = short, 2 = long) */
585 FALSE, /* pc_relative */
587 complain_overflow_signed, /* complain_on_overflow */
588 bfd_elf_generic_reloc, /* special_function */
589 AARCH64_R_STR (MOVW_SABS_G1), /* name */
590 FALSE, /* partial_inplace */
591 0xffff, /* src_mask */
592 0xffff, /* dst_mask */
593 FALSE), /* pcrel_offset */
595 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
596 HOWTO64 (AARCH64_R (MOVW_SABS_G2), /* type */
598 2, /* size (0 = byte, 1 = short, 2 = long) */
600 FALSE, /* pc_relative */
602 complain_overflow_signed, /* complain_on_overflow */
603 bfd_elf_generic_reloc, /* special_function */
604 AARCH64_R_STR (MOVW_SABS_G2), /* name */
605 FALSE, /* partial_inplace */
606 0xffff, /* src_mask */
607 0xffff, /* dst_mask */
608 FALSE), /* pcrel_offset */
610 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
611 addresses: PG(x) is (x & ~0xfff). */
613 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
614 HOWTO (AARCH64_R (LD_PREL_LO19), /* type */
616 2, /* size (0 = byte, 1 = short, 2 = long) */
618 TRUE, /* pc_relative */
620 complain_overflow_signed, /* complain_on_overflow */
621 bfd_elf_generic_reloc, /* special_function */
622 AARCH64_R_STR (LD_PREL_LO19), /* name */
623 FALSE, /* partial_inplace */
624 0x7ffff, /* src_mask */
625 0x7ffff, /* dst_mask */
626 TRUE), /* pcrel_offset */
628 /* ADR: (S+A-P) & 0x1fffff */
629 HOWTO (AARCH64_R (ADR_PREL_LO21), /* type */
631 2, /* size (0 = byte, 1 = short, 2 = long) */
633 TRUE, /* pc_relative */
635 complain_overflow_signed, /* complain_on_overflow */
636 bfd_elf_generic_reloc, /* special_function */
637 AARCH64_R_STR (ADR_PREL_LO21), /* name */
638 FALSE, /* partial_inplace */
639 0x1fffff, /* src_mask */
640 0x1fffff, /* dst_mask */
641 TRUE), /* pcrel_offset */
643 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
644 HOWTO (AARCH64_R (ADR_PREL_PG_HI21), /* type */
646 2, /* size (0 = byte, 1 = short, 2 = long) */
648 TRUE, /* pc_relative */
650 complain_overflow_signed, /* complain_on_overflow */
651 bfd_elf_generic_reloc, /* special_function */
652 AARCH64_R_STR (ADR_PREL_PG_HI21), /* name */
653 FALSE, /* partial_inplace */
654 0x1fffff, /* src_mask */
655 0x1fffff, /* dst_mask */
656 TRUE), /* pcrel_offset */
658 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
659 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC), /* type */
661 2, /* size (0 = byte, 1 = short, 2 = long) */
663 TRUE, /* pc_relative */
665 complain_overflow_dont, /* complain_on_overflow */
666 bfd_elf_generic_reloc, /* special_function */
667 AARCH64_R_STR (ADR_PREL_PG_HI21_NC), /* name */
668 FALSE, /* partial_inplace */
669 0x1fffff, /* src_mask */
670 0x1fffff, /* dst_mask */
671 TRUE), /* pcrel_offset */
673 /* ADD: (S+A) & 0xfff [no overflow check] */
674 HOWTO (AARCH64_R (ADD_ABS_LO12_NC), /* type */
676 2, /* size (0 = byte, 1 = short, 2 = long) */
678 FALSE, /* pc_relative */
680 complain_overflow_dont, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 AARCH64_R_STR (ADD_ABS_LO12_NC), /* name */
683 FALSE, /* partial_inplace */
684 0x3ffc00, /* src_mask */
685 0x3ffc00, /* dst_mask */
686 FALSE), /* pcrel_offset */
688 /* LD/ST8: (S+A) & 0xfff */
689 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC), /* type */
691 2, /* size (0 = byte, 1 = short, 2 = long) */
693 FALSE, /* pc_relative */
695 complain_overflow_dont, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 AARCH64_R_STR (LDST8_ABS_LO12_NC), /* name */
698 FALSE, /* partial_inplace */
699 0xfff, /* src_mask */
700 0xfff, /* dst_mask */
701 FALSE), /* pcrel_offset */
703 /* Relocations for control-flow instructions. */
705 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
706 HOWTO (AARCH64_R (TSTBR14), /* type */
708 2, /* size (0 = byte, 1 = short, 2 = long) */
710 TRUE, /* pc_relative */
712 complain_overflow_signed, /* complain_on_overflow */
713 bfd_elf_generic_reloc, /* special_function */
714 AARCH64_R_STR (TSTBR14), /* name */
715 FALSE, /* partial_inplace */
716 0x3fff, /* src_mask */
717 0x3fff, /* dst_mask */
718 TRUE), /* pcrel_offset */
720 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
721 HOWTO (AARCH64_R (CONDBR19), /* type */
723 2, /* size (0 = byte, 1 = short, 2 = long) */
725 TRUE, /* pc_relative */
727 complain_overflow_signed, /* complain_on_overflow */
728 bfd_elf_generic_reloc, /* special_function */
729 AARCH64_R_STR (CONDBR19), /* name */
730 FALSE, /* partial_inplace */
731 0x7ffff, /* src_mask */
732 0x7ffff, /* dst_mask */
733 TRUE), /* pcrel_offset */
735 /* B: ((S+A-P) >> 2) & 0x3ffffff */
736 HOWTO (AARCH64_R (JUMP26), /* type */
738 2, /* size (0 = byte, 1 = short, 2 = long) */
740 TRUE, /* pc_relative */
742 complain_overflow_signed, /* complain_on_overflow */
743 bfd_elf_generic_reloc, /* special_function */
744 AARCH64_R_STR (JUMP26), /* name */
745 FALSE, /* partial_inplace */
746 0x3ffffff, /* src_mask */
747 0x3ffffff, /* dst_mask */
748 TRUE), /* pcrel_offset */
750 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
751 HOWTO (AARCH64_R (CALL26), /* type */
753 2, /* size (0 = byte, 1 = short, 2 = long) */
755 TRUE, /* pc_relative */
757 complain_overflow_signed, /* complain_on_overflow */
758 bfd_elf_generic_reloc, /* special_function */
759 AARCH64_R_STR (CALL26), /* name */
760 FALSE, /* partial_inplace */
761 0x3ffffff, /* src_mask */
762 0x3ffffff, /* dst_mask */
763 TRUE), /* pcrel_offset */
765 /* LD/ST16: (S+A) & 0xffe */
766 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC), /* type */
768 2, /* size (0 = byte, 1 = short, 2 = long) */
770 FALSE, /* pc_relative */
772 complain_overflow_dont, /* complain_on_overflow */
773 bfd_elf_generic_reloc, /* special_function */
774 AARCH64_R_STR (LDST16_ABS_LO12_NC), /* name */
775 FALSE, /* partial_inplace */
776 0xffe, /* src_mask */
777 0xffe, /* dst_mask */
778 FALSE), /* pcrel_offset */
780 /* LD/ST32: (S+A) & 0xffc */
781 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC), /* type */
783 2, /* size (0 = byte, 1 = short, 2 = long) */
785 FALSE, /* pc_relative */
787 complain_overflow_dont, /* complain_on_overflow */
788 bfd_elf_generic_reloc, /* special_function */
789 AARCH64_R_STR (LDST32_ABS_LO12_NC), /* name */
790 FALSE, /* partial_inplace */
791 0xffc, /* src_mask */
792 0xffc, /* dst_mask */
793 FALSE), /* pcrel_offset */
795 /* LD/ST64: (S+A) & 0xff8 */
796 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC), /* type */
798 2, /* size (0 = byte, 1 = short, 2 = long) */
800 FALSE, /* pc_relative */
802 complain_overflow_dont, /* complain_on_overflow */
803 bfd_elf_generic_reloc, /* special_function */
804 AARCH64_R_STR (LDST64_ABS_LO12_NC), /* name */
805 FALSE, /* partial_inplace */
806 0xff8, /* src_mask */
807 0xff8, /* dst_mask */
808 FALSE), /* pcrel_offset */
810 /* LD/ST128: (S+A) & 0xff0 */
811 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC), /* type */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
815 FALSE, /* pc_relative */
817 complain_overflow_dont, /* complain_on_overflow */
818 bfd_elf_generic_reloc, /* special_function */
819 AARCH64_R_STR (LDST128_ABS_LO12_NC), /* name */
820 FALSE, /* partial_inplace */
821 0xff0, /* src_mask */
822 0xff0, /* dst_mask */
823 FALSE), /* pcrel_offset */
825 /* Set a load-literal immediate field to bits
826 0x1FFFFC of G(S)-P */
827 HOWTO (AARCH64_R (GOT_LD_PREL19), /* type */
829 2, /* size (0 = byte,1 = short,2 = long) */
831 TRUE, /* pc_relative */
833 complain_overflow_signed, /* complain_on_overflow */
834 bfd_elf_generic_reloc, /* special_function */
835 AARCH64_R_STR (GOT_LD_PREL19), /* name */
836 FALSE, /* partial_inplace */
837 0xffffe0, /* src_mask */
838 0xffffe0, /* dst_mask */
839 TRUE), /* pcrel_offset */
841 /* Get to the page for the GOT entry for the symbol
842 (G(S) - P) using an ADRP instruction. */
843 HOWTO (AARCH64_R (ADR_GOT_PAGE), /* type */
845 2, /* size (0 = byte, 1 = short, 2 = long) */
847 TRUE, /* pc_relative */
849 complain_overflow_dont, /* complain_on_overflow */
850 bfd_elf_generic_reloc, /* special_function */
851 AARCH64_R_STR (ADR_GOT_PAGE), /* name */
852 FALSE, /* partial_inplace */
853 0x1fffff, /* src_mask */
854 0x1fffff, /* dst_mask */
855 TRUE), /* pcrel_offset */
857 /* LD64: GOT offset G(S) & 0xff8 */
858 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC), /* type */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
862 FALSE, /* pc_relative */
864 complain_overflow_dont, /* complain_on_overflow */
865 bfd_elf_generic_reloc, /* special_function */
866 AARCH64_R_STR (LD64_GOT_LO12_NC), /* name */
867 FALSE, /* partial_inplace */
868 0xff8, /* src_mask */
869 0xff8, /* dst_mask */
870 FALSE), /* pcrel_offset */
872 /* LD32: GOT offset G(S) & 0xffc */
873 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC), /* type */
875 2, /* size (0 = byte, 1 = short, 2 = long) */
877 FALSE, /* pc_relative */
879 complain_overflow_dont, /* complain_on_overflow */
880 bfd_elf_generic_reloc, /* special_function */
881 AARCH64_R_STR (LD32_GOT_LO12_NC), /* name */
882 FALSE, /* partial_inplace */
883 0xffc, /* src_mask */
884 0xffc, /* dst_mask */
885 FALSE), /* pcrel_offset */
887 /* Lower 16 bits of GOT offset for the symbol. */
888 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G0_NC), /* type */
890 2, /* size (0 = byte, 1 = short, 2 = long) */
892 FALSE, /* pc_relative */
894 complain_overflow_dont, /* complain_on_overflow */
895 bfd_elf_generic_reloc, /* special_function */
896 AARCH64_R_STR (MOVW_GOTOFF_G0_NC), /* name */
897 FALSE, /* partial_inplace */
898 0xffff, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
902 /* Higher 16 bits of GOT offset for the symbol. */
903 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G1), /* type */
905 2, /* size (0 = byte, 1 = short, 2 = long) */
907 FALSE, /* pc_relative */
909 complain_overflow_unsigned, /* complain_on_overflow */
910 bfd_elf_generic_reloc, /* special_function */
911 AARCH64_R_STR (MOVW_GOTOFF_G1), /* name */
912 FALSE, /* partial_inplace */
913 0xffff, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
917 /* LD64: GOT offset for the symbol. */
918 HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15), /* type */
920 2, /* size (0 = byte, 1 = short, 2 = long) */
922 FALSE, /* pc_relative */
924 complain_overflow_unsigned, /* complain_on_overflow */
925 bfd_elf_generic_reloc, /* special_function */
926 AARCH64_R_STR (LD64_GOTOFF_LO15), /* name */
927 FALSE, /* partial_inplace */
928 0x7ff8, /* src_mask */
929 0x7ff8, /* dst_mask */
930 FALSE), /* pcrel_offset */
932 /* LD32: GOT offset to the page address of GOT table.
933 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */
934 HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14), /* type */
936 2, /* size (0 = byte, 1 = short, 2 = long) */
938 FALSE, /* pc_relative */
940 complain_overflow_unsigned, /* complain_on_overflow */
941 bfd_elf_generic_reloc, /* special_function */
942 AARCH64_R_STR (LD32_GOTPAGE_LO14), /* name */
943 FALSE, /* partial_inplace */
944 0x5ffc, /* src_mask */
945 0x5ffc, /* dst_mask */
946 FALSE), /* pcrel_offset */
948 /* LD64: GOT offset to the page address of GOT table.
949 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */
950 HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15), /* type */
952 2, /* size (0 = byte, 1 = short, 2 = long) */
954 FALSE, /* pc_relative */
956 complain_overflow_unsigned, /* complain_on_overflow */
957 bfd_elf_generic_reloc, /* special_function */
958 AARCH64_R_STR (LD64_GOTPAGE_LO15), /* name */
959 FALSE, /* partial_inplace */
960 0x7ff8, /* src_mask */
961 0x7ff8, /* dst_mask */
962 FALSE), /* pcrel_offset */
964 /* Get to the page for the GOT entry for the symbol
965 (G(S) - P) using an ADRP instruction. */
966 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21), /* type */
968 2, /* size (0 = byte, 1 = short, 2 = long) */
970 TRUE, /* pc_relative */
972 complain_overflow_dont, /* complain_on_overflow */
973 bfd_elf_generic_reloc, /* special_function */
974 AARCH64_R_STR (TLSGD_ADR_PAGE21), /* name */
975 FALSE, /* partial_inplace */
976 0x1fffff, /* src_mask */
977 0x1fffff, /* dst_mask */
978 TRUE), /* pcrel_offset */
980 HOWTO (AARCH64_R (TLSGD_ADR_PREL21), /* type */
982 2, /* size (0 = byte, 1 = short, 2 = long) */
984 TRUE, /* pc_relative */
986 complain_overflow_dont, /* complain_on_overflow */
987 bfd_elf_generic_reloc, /* special_function */
988 AARCH64_R_STR (TLSGD_ADR_PREL21), /* name */
989 FALSE, /* partial_inplace */
990 0x1fffff, /* src_mask */
991 0x1fffff, /* dst_mask */
992 TRUE), /* pcrel_offset */
994 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
995 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC), /* type */
997 2, /* size (0 = byte, 1 = short, 2 = long) */
999 FALSE, /* pc_relative */
1001 complain_overflow_dont, /* complain_on_overflow */
1002 bfd_elf_generic_reloc, /* special_function */
1003 AARCH64_R_STR (TLSGD_ADD_LO12_NC), /* name */
1004 FALSE, /* partial_inplace */
1005 0xfff, /* src_mask */
1006 0xfff, /* dst_mask */
1007 FALSE), /* pcrel_offset */
1009 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1), /* type */
1010 16, /* rightshift */
1011 2, /* size (0 = byte, 1 = short, 2 = long) */
1013 FALSE, /* pc_relative */
1015 complain_overflow_dont, /* complain_on_overflow */
1016 bfd_elf_generic_reloc, /* special_function */
1017 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1), /* name */
1018 FALSE, /* partial_inplace */
1019 0xffff, /* src_mask */
1020 0xffff, /* dst_mask */
1021 FALSE), /* pcrel_offset */
1023 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC), /* type */
1025 2, /* size (0 = byte, 1 = short, 2 = long) */
1027 FALSE, /* pc_relative */
1029 complain_overflow_dont, /* complain_on_overflow */
1030 bfd_elf_generic_reloc, /* special_function */
1031 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC), /* name */
1032 FALSE, /* partial_inplace */
1033 0xffff, /* src_mask */
1034 0xffff, /* dst_mask */
1035 FALSE), /* pcrel_offset */
1037 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21), /* type */
1038 12, /* rightshift */
1039 2, /* size (0 = byte, 1 = short, 2 = long) */
1041 FALSE, /* pc_relative */
1043 complain_overflow_dont, /* complain_on_overflow */
1044 bfd_elf_generic_reloc, /* special_function */
1045 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21), /* name */
1046 FALSE, /* partial_inplace */
1047 0x1fffff, /* src_mask */
1048 0x1fffff, /* dst_mask */
1049 FALSE), /* pcrel_offset */
1051 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC), /* type */
1053 2, /* size (0 = byte, 1 = short, 2 = long) */
1055 FALSE, /* pc_relative */
1057 complain_overflow_dont, /* complain_on_overflow */
1058 bfd_elf_generic_reloc, /* special_function */
1059 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC), /* name */
1060 FALSE, /* partial_inplace */
1061 0xff8, /* src_mask */
1062 0xff8, /* dst_mask */
1063 FALSE), /* pcrel_offset */
1065 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC), /* type */
1067 2, /* size (0 = byte, 1 = short, 2 = long) */
1069 FALSE, /* pc_relative */
1071 complain_overflow_dont, /* complain_on_overflow */
1072 bfd_elf_generic_reloc, /* special_function */
1073 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC), /* name */
1074 FALSE, /* partial_inplace */
1075 0xffc, /* src_mask */
1076 0xffc, /* dst_mask */
1077 FALSE), /* pcrel_offset */
1079 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19), /* type */
1081 2, /* size (0 = byte, 1 = short, 2 = long) */
1083 FALSE, /* pc_relative */
1085 complain_overflow_dont, /* complain_on_overflow */
1086 bfd_elf_generic_reloc, /* special_function */
1087 AARCH64_R_STR (TLSIE_LD_GOTTPREL_PREL19), /* name */
1088 FALSE, /* partial_inplace */
1089 0x1ffffc, /* src_mask */
1090 0x1ffffc, /* dst_mask */
1091 FALSE), /* pcrel_offset */
1093 /* ADD: bit[23:12] of byte offset to module TLS base address. */
1094 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_HI12), /* type */
1095 12, /* rightshift */
1096 2, /* size (0 = byte, 1 = short, 2 = long) */
1098 FALSE, /* pc_relative */
1100 complain_overflow_unsigned, /* complain_on_overflow */
1101 bfd_elf_generic_reloc, /* special_function */
1102 AARCH64_R_STR (TLSLD_ADD_DTPREL_HI12), /* name */
1103 FALSE, /* partial_inplace */
1104 0xfff, /* src_mask */
1105 0xfff, /* dst_mask */
1106 FALSE), /* pcrel_offset */
1108 /* Unsigned 12 bit byte offset to module TLS base address. */
1109 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12), /* type */
1111 2, /* size (0 = byte, 1 = short, 2 = long) */
1113 FALSE, /* pc_relative */
1115 complain_overflow_unsigned, /* complain_on_overflow */
1116 bfd_elf_generic_reloc, /* special_function */
1117 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12), /* name */
1118 FALSE, /* partial_inplace */
1119 0xfff, /* src_mask */
1120 0xfff, /* dst_mask */
1121 FALSE), /* pcrel_offset */
1123 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12. */
1124 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12_NC), /* type */
1126 2, /* size (0 = byte, 1 = short, 2 = long) */
1128 FALSE, /* pc_relative */
1130 complain_overflow_dont, /* complain_on_overflow */
1131 bfd_elf_generic_reloc, /* special_function */
1132 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12_NC), /* name */
1133 FALSE, /* partial_inplace */
1134 0xfff, /* src_mask */
1135 0xfff, /* dst_mask */
1136 FALSE), /* pcrel_offset */
1138 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1139 HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC), /* type */
1141 2, /* size (0 = byte, 1 = short, 2 = long) */
1143 FALSE, /* pc_relative */
1145 complain_overflow_dont, /* complain_on_overflow */
1146 bfd_elf_generic_reloc, /* special_function */
1147 AARCH64_R_STR (TLSLD_ADD_LO12_NC), /* name */
1148 FALSE, /* partial_inplace */
1149 0xfff, /* src_mask */
1150 0xfff, /* dst_mask */
1151 FALSE), /* pcrel_offset */
1153 /* Get to the page for the GOT entry for the symbol
1154 (G(S) - P) using an ADRP instruction. */
1155 HOWTO (AARCH64_R (TLSLD_ADR_PAGE21), /* type */
1156 12, /* rightshift */
1157 2, /* size (0 = byte, 1 = short, 2 = long) */
1159 TRUE, /* pc_relative */
1161 complain_overflow_signed, /* complain_on_overflow */
1162 bfd_elf_generic_reloc, /* special_function */
1163 AARCH64_R_STR (TLSLD_ADR_PAGE21), /* name */
1164 FALSE, /* partial_inplace */
1165 0x1fffff, /* src_mask */
1166 0x1fffff, /* dst_mask */
1167 TRUE), /* pcrel_offset */
1169 HOWTO (AARCH64_R (TLSLD_ADR_PREL21), /* type */
1171 2, /* size (0 = byte, 1 = short, 2 = long) */
1173 TRUE, /* pc_relative */
1175 complain_overflow_signed, /* complain_on_overflow */
1176 bfd_elf_generic_reloc, /* special_function */
1177 AARCH64_R_STR (TLSLD_ADR_PREL21), /* name */
1178 FALSE, /* partial_inplace */
1179 0x1fffff, /* src_mask */
1180 0x1fffff, /* dst_mask */
1181 TRUE), /* pcrel_offset */
1183 /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */
1184 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12), /* type */
1186 2, /* size (0 = byte, 1 = short, 2 = long) */
1188 FALSE, /* pc_relative */
1190 complain_overflow_unsigned, /* complain_on_overflow */
1191 bfd_elf_generic_reloc, /* special_function */
1192 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12), /* name */
1193 FALSE, /* partial_inplace */
1194 0x1ffc00, /* src_mask */
1195 0x1ffc00, /* dst_mask */
1196 FALSE), /* pcrel_offset */
1198 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12, but no overflow check. */
1199 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12_NC), /* type */
1201 2, /* size (0 = byte, 1 = short, 2 = long) */
1203 FALSE, /* pc_relative */
1205 complain_overflow_dont, /* complain_on_overflow */
1206 bfd_elf_generic_reloc, /* special_function */
1207 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12_NC), /* name */
1208 FALSE, /* partial_inplace */
1209 0x1ffc00, /* src_mask */
1210 0x1ffc00, /* dst_mask */
1211 FALSE), /* pcrel_offset */
1213 /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */
1214 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12), /* type */
1216 2, /* size (0 = byte, 1 = short, 2 = long) */
1218 FALSE, /* pc_relative */
1220 complain_overflow_unsigned, /* complain_on_overflow */
1221 bfd_elf_generic_reloc, /* special_function */
1222 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12), /* name */
1223 FALSE, /* partial_inplace */
1224 0x3ffc00, /* src_mask */
1225 0x3ffc00, /* dst_mask */
1226 FALSE), /* pcrel_offset */
1228 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12, but no overflow check. */
1229 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12_NC), /* type */
1231 2, /* size (0 = byte, 1 = short, 2 = long) */
1233 FALSE, /* pc_relative */
1235 complain_overflow_dont, /* complain_on_overflow */
1236 bfd_elf_generic_reloc, /* special_function */
1237 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12_NC), /* name */
1238 FALSE, /* partial_inplace */
1239 0xffc00, /* src_mask */
1240 0xffc00, /* dst_mask */
1241 FALSE), /* pcrel_offset */
1243 /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */
1244 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12), /* type */
1246 2, /* size (0 = byte, 1 = short, 2 = long) */
1248 FALSE, /* pc_relative */
1250 complain_overflow_unsigned, /* complain_on_overflow */
1251 bfd_elf_generic_reloc, /* special_function */
1252 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12), /* name */
1253 FALSE, /* partial_inplace */
1254 0x3ffc00, /* src_mask */
1255 0x3ffc00, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1258 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12, but no overflow check. */
1259 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12_NC), /* type */
1261 2, /* size (0 = byte, 1 = short, 2 = long) */
1263 FALSE, /* pc_relative */
1265 complain_overflow_dont, /* complain_on_overflow */
1266 bfd_elf_generic_reloc, /* special_function */
1267 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12_NC), /* name */
1268 FALSE, /* partial_inplace */
1269 0x7fc00, /* src_mask */
1270 0x7fc00, /* dst_mask */
1271 FALSE), /* pcrel_offset */
1273 /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */
1274 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12), /* type */
1276 2, /* size (0 = byte, 1 = short, 2 = long) */
1278 FALSE, /* pc_relative */
1280 complain_overflow_unsigned, /* complain_on_overflow */
1281 bfd_elf_generic_reloc, /* special_function */
1282 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12), /* name */
1283 FALSE, /* partial_inplace */
1284 0x3ffc00, /* src_mask */
1285 0x3ffc00, /* dst_mask */
1286 FALSE), /* pcrel_offset */
1288 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12, but no overflow check. */
1289 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12_NC), /* type */
1291 2, /* size (0 = byte, 1 = short, 2 = long) */
1293 FALSE, /* pc_relative */
1295 complain_overflow_dont, /* complain_on_overflow */
1296 bfd_elf_generic_reloc, /* special_function */
1297 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12_NC), /* name */
1298 FALSE, /* partial_inplace */
1299 0x3ffc00, /* src_mask */
1300 0x3ffc00, /* dst_mask */
1301 FALSE), /* pcrel_offset */
1303 /* MOVZ: bit[15:0] of byte offset to module TLS base address. */
1304 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0), /* type */
1306 2, /* size (0 = byte, 1 = short, 2 = long) */
1308 FALSE, /* pc_relative */
1310 complain_overflow_unsigned, /* complain_on_overflow */
1311 bfd_elf_generic_reloc, /* special_function */
1312 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0), /* name */
1313 FALSE, /* partial_inplace */
1314 0xffff, /* src_mask */
1315 0xffff, /* dst_mask */
1316 FALSE), /* pcrel_offset */
1318 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0. */
1319 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0_NC), /* type */
1321 2, /* size (0 = byte, 1 = short, 2 = long) */
1323 FALSE, /* pc_relative */
1325 complain_overflow_dont, /* complain_on_overflow */
1326 bfd_elf_generic_reloc, /* special_function */
1327 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0_NC), /* name */
1328 FALSE, /* partial_inplace */
1329 0xffff, /* src_mask */
1330 0xffff, /* dst_mask */
1331 FALSE), /* pcrel_offset */
1333 /* MOVZ: bit[31:16] of byte offset to module TLS base address. */
1334 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G1), /* type */
1335 16, /* rightshift */
1336 2, /* size (0 = byte, 1 = short, 2 = long) */
1338 FALSE, /* pc_relative */
1340 complain_overflow_unsigned, /* complain_on_overflow */
1341 bfd_elf_generic_reloc, /* special_function */
1342 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1), /* name */
1343 FALSE, /* partial_inplace */
1344 0xffff, /* src_mask */
1345 0xffff, /* dst_mask */
1346 FALSE), /* pcrel_offset */
1348 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1. */
1349 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G1_NC), /* type */
1350 16, /* rightshift */
1351 2, /* size (0 = byte, 1 = short, 2 = long) */
1353 FALSE, /* pc_relative */
1355 complain_overflow_dont, /* complain_on_overflow */
1356 bfd_elf_generic_reloc, /* special_function */
1357 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1_NC), /* name */
1358 FALSE, /* partial_inplace */
1359 0xffff, /* src_mask */
1360 0xffff, /* dst_mask */
1361 FALSE), /* pcrel_offset */
1363 /* MOVZ: bit[47:32] of byte offset to module TLS base address. */
1364 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G2), /* type */
1365 32, /* rightshift */
1366 2, /* size (0 = byte, 1 = short, 2 = long) */
1368 FALSE, /* pc_relative */
1370 complain_overflow_unsigned, /* complain_on_overflow */
1371 bfd_elf_generic_reloc, /* special_function */
1372 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G2), /* name */
1373 FALSE, /* partial_inplace */
1374 0xffff, /* src_mask */
1375 0xffff, /* dst_mask */
1376 FALSE), /* pcrel_offset */
1378 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2), /* type */
1379 32, /* rightshift */
1380 2, /* size (0 = byte, 1 = short, 2 = long) */
1382 FALSE, /* pc_relative */
1384 complain_overflow_unsigned, /* complain_on_overflow */
1385 bfd_elf_generic_reloc, /* special_function */
1386 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2), /* name */
1387 FALSE, /* partial_inplace */
1388 0xffff, /* src_mask */
1389 0xffff, /* dst_mask */
1390 FALSE), /* pcrel_offset */
1392 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1), /* type */
1393 16, /* rightshift */
1394 2, /* size (0 = byte, 1 = short, 2 = long) */
1396 FALSE, /* pc_relative */
1398 complain_overflow_dont, /* complain_on_overflow */
1399 bfd_elf_generic_reloc, /* special_function */
1400 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1), /* name */
1401 FALSE, /* partial_inplace */
1402 0xffff, /* src_mask */
1403 0xffff, /* dst_mask */
1404 FALSE), /* pcrel_offset */
1406 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC), /* type */
1407 16, /* rightshift */
1408 2, /* size (0 = byte, 1 = short, 2 = long) */
1410 FALSE, /* pc_relative */
1412 complain_overflow_dont, /* complain_on_overflow */
1413 bfd_elf_generic_reloc, /* special_function */
1414 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC), /* name */
1415 FALSE, /* partial_inplace */
1416 0xffff, /* src_mask */
1417 0xffff, /* dst_mask */
1418 FALSE), /* pcrel_offset */
1420 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0), /* type */
1422 2, /* size (0 = byte, 1 = short, 2 = long) */
1424 FALSE, /* pc_relative */
1426 complain_overflow_dont, /* complain_on_overflow */
1427 bfd_elf_generic_reloc, /* special_function */
1428 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0), /* name */
1429 FALSE, /* partial_inplace */
1430 0xffff, /* src_mask */
1431 0xffff, /* dst_mask */
1432 FALSE), /* pcrel_offset */
1434 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC), /* type */
1436 2, /* size (0 = byte, 1 = short, 2 = long) */
1438 FALSE, /* pc_relative */
1440 complain_overflow_dont, /* complain_on_overflow */
1441 bfd_elf_generic_reloc, /* special_function */
1442 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC), /* name */
1443 FALSE, /* partial_inplace */
1444 0xffff, /* src_mask */
1445 0xffff, /* dst_mask */
1446 FALSE), /* pcrel_offset */
1448 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12), /* type */
1449 12, /* rightshift */
1450 2, /* size (0 = byte, 1 = short, 2 = long) */
1452 FALSE, /* pc_relative */
1454 complain_overflow_unsigned, /* complain_on_overflow */
1455 bfd_elf_generic_reloc, /* special_function */
1456 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12), /* name */
1457 FALSE, /* partial_inplace */
1458 0xfff, /* src_mask */
1459 0xfff, /* dst_mask */
1460 FALSE), /* pcrel_offset */
1462 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12), /* type */
1464 2, /* size (0 = byte, 1 = short, 2 = long) */
1466 FALSE, /* pc_relative */
1468 complain_overflow_unsigned, /* complain_on_overflow */
1469 bfd_elf_generic_reloc, /* special_function */
1470 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12), /* name */
1471 FALSE, /* partial_inplace */
1472 0xfff, /* src_mask */
1473 0xfff, /* dst_mask */
1474 FALSE), /* pcrel_offset */
1476 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC), /* type */
1478 2, /* size (0 = byte, 1 = short, 2 = long) */
1480 FALSE, /* pc_relative */
1482 complain_overflow_dont, /* complain_on_overflow */
1483 bfd_elf_generic_reloc, /* special_function */
1484 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC), /* name */
1485 FALSE, /* partial_inplace */
1486 0xfff, /* src_mask */
1487 0xfff, /* dst_mask */
1488 FALSE), /* pcrel_offset */
1490 HOWTO (AARCH64_R (TLSDESC_LD_PREL19), /* type */
1492 2, /* size (0 = byte, 1 = short, 2 = long) */
1494 TRUE, /* pc_relative */
1496 complain_overflow_dont, /* complain_on_overflow */
1497 bfd_elf_generic_reloc, /* special_function */
1498 AARCH64_R_STR (TLSDESC_LD_PREL19), /* name */
1499 FALSE, /* partial_inplace */
1500 0x0ffffe0, /* src_mask */
1501 0x0ffffe0, /* dst_mask */
1502 TRUE), /* pcrel_offset */
1504 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21), /* type */
1506 2, /* size (0 = byte, 1 = short, 2 = long) */
1508 TRUE, /* pc_relative */
1510 complain_overflow_dont, /* complain_on_overflow */
1511 bfd_elf_generic_reloc, /* special_function */
1512 AARCH64_R_STR (TLSDESC_ADR_PREL21), /* name */
1513 FALSE, /* partial_inplace */
1514 0x1fffff, /* src_mask */
1515 0x1fffff, /* dst_mask */
1516 TRUE), /* pcrel_offset */
1518 /* Get to the page for the GOT entry for the symbol
1519 (G(S) - P) using an ADRP instruction. */
1520 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21), /* type */
1521 12, /* rightshift */
1522 2, /* size (0 = byte, 1 = short, 2 = long) */
1524 TRUE, /* pc_relative */
1526 complain_overflow_dont, /* complain_on_overflow */
1527 bfd_elf_generic_reloc, /* special_function */
1528 AARCH64_R_STR (TLSDESC_ADR_PAGE21), /* name */
1529 FALSE, /* partial_inplace */
1530 0x1fffff, /* src_mask */
1531 0x1fffff, /* dst_mask */
1532 TRUE), /* pcrel_offset */
1534 /* LD64: GOT offset G(S) & 0xff8. */
1535 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12_NC), /* type */
1537 2, /* size (0 = byte, 1 = short, 2 = long) */
1539 FALSE, /* pc_relative */
1541 complain_overflow_dont, /* complain_on_overflow */
1542 bfd_elf_generic_reloc, /* special_function */
1543 AARCH64_R_STR (TLSDESC_LD64_LO12_NC), /* name */
1544 FALSE, /* partial_inplace */
1545 0xff8, /* src_mask */
1546 0xff8, /* dst_mask */
1547 FALSE), /* pcrel_offset */
1549 /* LD32: GOT offset G(S) & 0xffc. */
1550 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC), /* type */
1552 2, /* size (0 = byte, 1 = short, 2 = long) */
1554 FALSE, /* pc_relative */
1556 complain_overflow_dont, /* complain_on_overflow */
1557 bfd_elf_generic_reloc, /* special_function */
1558 AARCH64_R_STR (TLSDESC_LD32_LO12_NC), /* name */
1559 FALSE, /* partial_inplace */
1560 0xffc, /* src_mask */
1561 0xffc, /* dst_mask */
1562 FALSE), /* pcrel_offset */
1564 /* ADD: GOT offset G(S) & 0xfff. */
1565 HOWTO (AARCH64_R (TLSDESC_ADD_LO12_NC), /* type */
1567 2, /* size (0 = byte, 1 = short, 2 = long) */
1569 FALSE, /* pc_relative */
1571 complain_overflow_dont, /* complain_on_overflow */
1572 bfd_elf_generic_reloc, /* special_function */
1573 AARCH64_R_STR (TLSDESC_ADD_LO12_NC), /* name */
1574 FALSE, /* partial_inplace */
1575 0xfff, /* src_mask */
1576 0xfff, /* dst_mask */
1577 FALSE), /* pcrel_offset */
1579 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1), /* type */
1580 16, /* rightshift */
1581 2, /* size (0 = byte, 1 = short, 2 = long) */
1583 FALSE, /* pc_relative */
1585 complain_overflow_dont, /* complain_on_overflow */
1586 bfd_elf_generic_reloc, /* special_function */
1587 AARCH64_R_STR (TLSDESC_OFF_G1), /* name */
1588 FALSE, /* partial_inplace */
1589 0xffff, /* src_mask */
1590 0xffff, /* dst_mask */
1591 FALSE), /* pcrel_offset */
1593 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC), /* type */
1595 2, /* size (0 = byte, 1 = short, 2 = long) */
1597 FALSE, /* pc_relative */
1599 complain_overflow_dont, /* complain_on_overflow */
1600 bfd_elf_generic_reloc, /* special_function */
1601 AARCH64_R_STR (TLSDESC_OFF_G0_NC), /* name */
1602 FALSE, /* partial_inplace */
1603 0xffff, /* src_mask */
1604 0xffff, /* dst_mask */
1605 FALSE), /* pcrel_offset */
1607 HOWTO64 (AARCH64_R (TLSDESC_LDR), /* type */
1609 2, /* size (0 = byte, 1 = short, 2 = long) */
1611 FALSE, /* pc_relative */
1613 complain_overflow_dont, /* complain_on_overflow */
1614 bfd_elf_generic_reloc, /* special_function */
1615 AARCH64_R_STR (TLSDESC_LDR), /* name */
1616 FALSE, /* partial_inplace */
1619 FALSE), /* pcrel_offset */
1621 HOWTO64 (AARCH64_R (TLSDESC_ADD), /* type */
1623 2, /* size (0 = byte, 1 = short, 2 = long) */
1625 FALSE, /* pc_relative */
1627 complain_overflow_dont, /* complain_on_overflow */
1628 bfd_elf_generic_reloc, /* special_function */
1629 AARCH64_R_STR (TLSDESC_ADD), /* name */
1630 FALSE, /* partial_inplace */
1633 FALSE), /* pcrel_offset */
1635 HOWTO (AARCH64_R (TLSDESC_CALL), /* type */
1637 2, /* size (0 = byte, 1 = short, 2 = long) */
1639 FALSE, /* pc_relative */
1641 complain_overflow_dont, /* complain_on_overflow */
1642 bfd_elf_generic_reloc, /* special_function */
1643 AARCH64_R_STR (TLSDESC_CALL), /* name */
1644 FALSE, /* partial_inplace */
1647 FALSE), /* pcrel_offset */
1649 HOWTO (AARCH64_R (COPY), /* type */
1651 2, /* size (0 = byte, 1 = short, 2 = long) */
1653 FALSE, /* pc_relative */
1655 complain_overflow_bitfield, /* complain_on_overflow */
1656 bfd_elf_generic_reloc, /* special_function */
1657 AARCH64_R_STR (COPY), /* name */
1658 TRUE, /* partial_inplace */
1659 0xffffffff, /* src_mask */
1660 0xffffffff, /* dst_mask */
1661 FALSE), /* pcrel_offset */
1663 HOWTO (AARCH64_R (GLOB_DAT), /* type */
1665 2, /* size (0 = byte, 1 = short, 2 = long) */
1667 FALSE, /* pc_relative */
1669 complain_overflow_bitfield, /* complain_on_overflow */
1670 bfd_elf_generic_reloc, /* special_function */
1671 AARCH64_R_STR (GLOB_DAT), /* name */
1672 TRUE, /* partial_inplace */
1673 0xffffffff, /* src_mask */
1674 0xffffffff, /* dst_mask */
1675 FALSE), /* pcrel_offset */
1677 HOWTO (AARCH64_R (JUMP_SLOT), /* type */
1679 2, /* size (0 = byte, 1 = short, 2 = long) */
1681 FALSE, /* pc_relative */
1683 complain_overflow_bitfield, /* complain_on_overflow */
1684 bfd_elf_generic_reloc, /* special_function */
1685 AARCH64_R_STR (JUMP_SLOT), /* name */
1686 TRUE, /* partial_inplace */
1687 0xffffffff, /* src_mask */
1688 0xffffffff, /* dst_mask */
1689 FALSE), /* pcrel_offset */
1691 HOWTO (AARCH64_R (RELATIVE), /* type */
1693 2, /* size (0 = byte, 1 = short, 2 = long) */
1695 FALSE, /* pc_relative */
1697 complain_overflow_bitfield, /* complain_on_overflow */
1698 bfd_elf_generic_reloc, /* special_function */
1699 AARCH64_R_STR (RELATIVE), /* name */
1700 TRUE, /* partial_inplace */
1701 ALL_ONES, /* src_mask */
1702 ALL_ONES, /* dst_mask */
1703 FALSE), /* pcrel_offset */
1705 HOWTO (AARCH64_R (TLS_DTPMOD), /* type */
1707 2, /* size (0 = byte, 1 = short, 2 = long) */
1709 FALSE, /* pc_relative */
1711 complain_overflow_dont, /* complain_on_overflow */
1712 bfd_elf_generic_reloc, /* special_function */
1714 AARCH64_R_STR (TLS_DTPMOD64), /* name */
1716 AARCH64_R_STR (TLS_DTPMOD), /* name */
1718 FALSE, /* partial_inplace */
1720 ALL_ONES, /* dst_mask */
1721 FALSE), /* pc_reloffset */
1723 HOWTO (AARCH64_R (TLS_DTPREL), /* type */
1725 2, /* size (0 = byte, 1 = short, 2 = long) */
1727 FALSE, /* pc_relative */
1729 complain_overflow_dont, /* complain_on_overflow */
1730 bfd_elf_generic_reloc, /* special_function */
1732 AARCH64_R_STR (TLS_DTPREL64), /* name */
1734 AARCH64_R_STR (TLS_DTPREL), /* name */
1736 FALSE, /* partial_inplace */
1738 ALL_ONES, /* dst_mask */
1739 FALSE), /* pcrel_offset */
1741 HOWTO (AARCH64_R (TLS_TPREL), /* type */
1743 2, /* size (0 = byte, 1 = short, 2 = long) */
1745 FALSE, /* pc_relative */
1747 complain_overflow_dont, /* complain_on_overflow */
1748 bfd_elf_generic_reloc, /* special_function */
1750 AARCH64_R_STR (TLS_TPREL64), /* name */
1752 AARCH64_R_STR (TLS_TPREL), /* name */
1754 FALSE, /* partial_inplace */
1756 ALL_ONES, /* dst_mask */
1757 FALSE), /* pcrel_offset */
1759 HOWTO (AARCH64_R (TLSDESC), /* type */
1761 2, /* size (0 = byte, 1 = short, 2 = long) */
1763 FALSE, /* pc_relative */
1765 complain_overflow_dont, /* complain_on_overflow */
1766 bfd_elf_generic_reloc, /* special_function */
1767 AARCH64_R_STR (TLSDESC), /* name */
1768 FALSE, /* partial_inplace */
1770 ALL_ONES, /* dst_mask */
1771 FALSE), /* pcrel_offset */
1773 HOWTO (AARCH64_R (IRELATIVE), /* type */
1775 2, /* size (0 = byte, 1 = short, 2 = long) */
1777 FALSE, /* pc_relative */
1779 complain_overflow_bitfield, /* complain_on_overflow */
1780 bfd_elf_generic_reloc, /* special_function */
1781 AARCH64_R_STR (IRELATIVE), /* name */
1782 FALSE, /* partial_inplace */
1784 ALL_ONES, /* dst_mask */
1785 FALSE), /* pcrel_offset */
1790 static reloc_howto_type elfNN_aarch64_howto_none =
1791 HOWTO (R_AARCH64_NONE, /* type */
1793 3, /* size (0 = byte, 1 = short, 2 = long) */
1795 FALSE, /* pc_relative */
1797 complain_overflow_dont,/* complain_on_overflow */
1798 bfd_elf_generic_reloc, /* special_function */
1799 "R_AARCH64_NONE", /* name */
1800 FALSE, /* partial_inplace */
1803 FALSE); /* pcrel_offset */
1805 /* Given HOWTO, return the bfd internal relocation enumerator. */
1807 static bfd_reloc_code_real_type
1808 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type *howto)
1811 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table);
1812 const ptrdiff_t offset
1813 = howto - elfNN_aarch64_howto_table;
1815 if (offset > 0 && offset < size - 1)
1816 return BFD_RELOC_AARCH64_RELOC_START + offset;
1818 if (howto == &elfNN_aarch64_howto_none)
1819 return BFD_RELOC_AARCH64_NONE;
1821 return BFD_RELOC_AARCH64_RELOC_START;
1824 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1826 static bfd_reloc_code_real_type
1827 elfNN_aarch64_bfd_reloc_from_type (unsigned int r_type)
1829 static bfd_boolean initialized_p = FALSE;
1830 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1831 static unsigned int offsets[R_AARCH64_end];
1833 if (initialized_p == FALSE)
1837 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1838 if (elfNN_aarch64_howto_table[i].type != 0)
1839 offsets[elfNN_aarch64_howto_table[i].type] = i;
1841 initialized_p = TRUE;
1844 if (r_type == R_AARCH64_NONE || r_type == R_AARCH64_NULL)
1845 return BFD_RELOC_AARCH64_NONE;
1847 /* PR 17512: file: b371e70a. */
1848 if (r_type >= R_AARCH64_end)
1850 _bfd_error_handler (_("Invalid AArch64 reloc number: %d"), r_type);
1851 bfd_set_error (bfd_error_bad_value);
1852 return BFD_RELOC_AARCH64_NONE;
1855 return BFD_RELOC_AARCH64_RELOC_START + offsets[r_type];
1858 struct elf_aarch64_reloc_map
1860 bfd_reloc_code_real_type from;
1861 bfd_reloc_code_real_type to;
1864 /* Map bfd generic reloc to AArch64-specific reloc. */
1865 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map[] =
1867 {BFD_RELOC_NONE, BFD_RELOC_AARCH64_NONE},
1869 /* Basic data relocations. */
1870 {BFD_RELOC_CTOR, BFD_RELOC_AARCH64_NN},
1871 {BFD_RELOC_64, BFD_RELOC_AARCH64_64},
1872 {BFD_RELOC_32, BFD_RELOC_AARCH64_32},
1873 {BFD_RELOC_16, BFD_RELOC_AARCH64_16},
1874 {BFD_RELOC_64_PCREL, BFD_RELOC_AARCH64_64_PCREL},
1875 {BFD_RELOC_32_PCREL, BFD_RELOC_AARCH64_32_PCREL},
1876 {BFD_RELOC_16_PCREL, BFD_RELOC_AARCH64_16_PCREL},
1879 /* Given the bfd internal relocation enumerator in CODE, return the
1880 corresponding howto entry. */
1882 static reloc_howto_type *
1883 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code)
1887 /* Convert bfd generic reloc to AArch64-specific reloc. */
1888 if (code < BFD_RELOC_AARCH64_RELOC_START
1889 || code > BFD_RELOC_AARCH64_RELOC_END)
1890 for (i = 0; i < ARRAY_SIZE (elf_aarch64_reloc_map); i++)
1891 if (elf_aarch64_reloc_map[i].from == code)
1893 code = elf_aarch64_reloc_map[i].to;
1897 if (code > BFD_RELOC_AARCH64_RELOC_START
1898 && code < BFD_RELOC_AARCH64_RELOC_END)
1899 if (elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START].type)
1900 return &elfNN_aarch64_howto_table[code - BFD_RELOC_AARCH64_RELOC_START];
1902 if (code == BFD_RELOC_AARCH64_NONE)
1903 return &elfNN_aarch64_howto_none;
1908 static reloc_howto_type *
1909 elfNN_aarch64_howto_from_type (unsigned int r_type)
1911 bfd_reloc_code_real_type val;
1912 reloc_howto_type *howto;
1917 bfd_set_error (bfd_error_bad_value);
1922 if (r_type == R_AARCH64_NONE)
1923 return &elfNN_aarch64_howto_none;
1925 val = elfNN_aarch64_bfd_reloc_from_type (r_type);
1926 howto = elfNN_aarch64_howto_from_bfd_reloc (val);
1931 bfd_set_error (bfd_error_bad_value);
1936 elfNN_aarch64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *bfd_reloc,
1937 Elf_Internal_Rela *elf_reloc)
1939 unsigned int r_type;
1941 r_type = ELFNN_R_TYPE (elf_reloc->r_info);
1942 bfd_reloc->howto = elfNN_aarch64_howto_from_type (r_type);
1945 static reloc_howto_type *
1946 elfNN_aarch64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1947 bfd_reloc_code_real_type code)
1949 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (code);
1954 bfd_set_error (bfd_error_bad_value);
1958 static reloc_howto_type *
1959 elfNN_aarch64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1964 for (i = 1; i < ARRAY_SIZE (elfNN_aarch64_howto_table) - 1; ++i)
1965 if (elfNN_aarch64_howto_table[i].name != NULL
1966 && strcasecmp (elfNN_aarch64_howto_table[i].name, r_name) == 0)
1967 return &elfNN_aarch64_howto_table[i];
1972 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
1973 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
1974 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
1975 #define TARGET_BIG_NAME "elfNN-bigaarch64"
1977 /* The linker script knows the section names for placement.
1978 The entry_names are used to do simple name mangling on the stubs.
1979 Given a function name, and its type, the stub can be found. The
1980 name can be changed. The only requirement is the %s be present. */
1981 #define STUB_ENTRY_NAME "__%s_veneer"
1983 /* The name of the dynamic interpreter. This is put in the .interp
1985 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
1987 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
1988 (((1 << 25) - 1) << 2)
1989 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
1992 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
1993 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
1996 aarch64_valid_for_adrp_p (bfd_vma value, bfd_vma place)
1998 bfd_signed_vma offset = (bfd_signed_vma) (PG (value) - PG (place)) >> 12;
1999 return offset <= AARCH64_MAX_ADRP_IMM && offset >= AARCH64_MIN_ADRP_IMM;
2003 aarch64_valid_branch_p (bfd_vma value, bfd_vma place)
2005 bfd_signed_vma offset = (bfd_signed_vma) (value - place);
2006 return (offset <= AARCH64_MAX_FWD_BRANCH_OFFSET
2007 && offset >= AARCH64_MAX_BWD_BRANCH_OFFSET);
2010 static const uint32_t aarch64_adrp_branch_stub [] =
2012 0x90000010, /* adrp ip0, X */
2013 /* R_AARCH64_ADR_HI21_PCREL(X) */
2014 0x91000210, /* add ip0, ip0, :lo12:X */
2015 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
2016 0xd61f0200, /* br ip0 */
2019 static const uint32_t aarch64_long_branch_stub[] =
2022 0x58000090, /* ldr ip0, 1f */
2024 0x18000090, /* ldr wip0, 1f */
2026 0x10000011, /* adr ip1, #0 */
2027 0x8b110210, /* add ip0, ip0, ip1 */
2028 0xd61f0200, /* br ip0 */
2029 0x00000000, /* 1: .xword or .word
2030 R_AARCH64_PRELNN(X) + 12
2035 static const uint32_t aarch64_erratum_835769_stub[] =
2037 0x00000000, /* Placeholder for multiply accumulate. */
2038 0x14000000, /* b <label> */
2041 static const uint32_t aarch64_erratum_843419_stub[] =
2043 0x00000000, /* Placeholder for LDR instruction. */
2044 0x14000000, /* b <label> */
2047 /* Section name for stubs is the associated section name plus this
2049 #define STUB_SUFFIX ".stub"
2051 enum elf_aarch64_stub_type
2054 aarch64_stub_adrp_branch,
2055 aarch64_stub_long_branch,
2056 aarch64_stub_erratum_835769_veneer,
2057 aarch64_stub_erratum_843419_veneer,
2060 struct elf_aarch64_stub_hash_entry
2062 /* Base hash table entry structure. */
2063 struct bfd_hash_entry root;
2065 /* The stub section. */
2068 /* Offset within stub_sec of the beginning of this stub. */
2069 bfd_vma stub_offset;
2071 /* Given the symbol's value and its section we can determine its final
2072 value when building the stubs (so the stub knows where to jump). */
2073 bfd_vma target_value;
2074 asection *target_section;
2076 enum elf_aarch64_stub_type stub_type;
2078 /* The symbol table entry, if any, that this was derived from. */
2079 struct elf_aarch64_link_hash_entry *h;
2081 /* Destination symbol type */
2082 unsigned char st_type;
2084 /* Where this stub is being called from, or, in the case of combined
2085 stub sections, the first input section in the group. */
2088 /* The name for the local symbol at the start of this stub. The
2089 stub name in the hash table has to be unique; this does not, so
2090 it can be friendlier. */
2093 /* The instruction which caused this stub to be generated (only valid for
2094 erratum 835769 workaround stubs at present). */
2095 uint32_t veneered_insn;
2097 /* In an erratum 843419 workaround stub, the ADRP instruction offset. */
2098 bfd_vma adrp_offset;
2101 /* Used to build a map of a section. This is required for mixed-endian
2104 typedef struct elf_elf_section_map
2109 elf_aarch64_section_map;
2112 typedef struct _aarch64_elf_section_data
2114 struct bfd_elf_section_data elf;
2115 unsigned int mapcount;
2116 unsigned int mapsize;
2117 elf_aarch64_section_map *map;
2119 _aarch64_elf_section_data;
2121 #define elf_aarch64_section_data(sec) \
2122 ((_aarch64_elf_section_data *) elf_section_data (sec))
2124 /* The size of the thread control block which is defined to be two pointers. */
2125 #define TCB_SIZE (ARCH_SIZE/8)*2
2127 struct elf_aarch64_local_symbol
2129 unsigned int got_type;
2130 bfd_signed_vma got_refcount;
2133 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
2134 offset is from the end of the jump table and reserved entries
2137 The magic value (bfd_vma) -1 indicates that an offset has not be
2139 bfd_vma tlsdesc_got_jump_table_offset;
2142 struct elf_aarch64_obj_tdata
2144 struct elf_obj_tdata root;
2146 /* local symbol descriptors */
2147 struct elf_aarch64_local_symbol *locals;
2149 /* Zero to warn when linking objects with incompatible enum sizes. */
2150 int no_enum_size_warning;
2152 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2153 int no_wchar_size_warning;
2156 #define elf_aarch64_tdata(bfd) \
2157 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
2159 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
2161 #define is_aarch64_elf(bfd) \
2162 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2163 && elf_tdata (bfd) != NULL \
2164 && elf_object_id (bfd) == AARCH64_ELF_DATA)
2167 elfNN_aarch64_mkobject (bfd *abfd)
2169 return bfd_elf_allocate_object (abfd, sizeof (struct elf_aarch64_obj_tdata),
2173 #define elf_aarch64_hash_entry(ent) \
2174 ((struct elf_aarch64_link_hash_entry *)(ent))
2176 #define GOT_UNKNOWN 0
2177 #define GOT_NORMAL 1
2178 #define GOT_TLS_GD 2
2179 #define GOT_TLS_IE 4
2180 #define GOT_TLSDESC_GD 8
2182 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
2184 /* AArch64 ELF linker hash entry. */
2185 struct elf_aarch64_link_hash_entry
2187 struct elf_link_hash_entry root;
2189 /* Track dynamic relocs copied for this symbol. */
2190 struct elf_dyn_relocs *dyn_relocs;
2192 /* Since PLT entries have variable size, we need to record the
2193 index into .got.plt instead of recomputing it from the PLT
2195 bfd_signed_vma plt_got_offset;
2197 /* Bit mask representing the type of GOT entry(s) if any required by
2199 unsigned int got_type;
2201 /* A pointer to the most recently used stub hash entry against this
2203 struct elf_aarch64_stub_hash_entry *stub_cache;
2205 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
2206 is from the end of the jump table and reserved entries within the PLTGOT.
2208 The magic value (bfd_vma) -1 indicates that an offset has not
2210 bfd_vma tlsdesc_got_jump_table_offset;
2214 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry *h,
2216 unsigned long r_symndx)
2219 return elf_aarch64_hash_entry (h)->got_type;
2221 if (! elf_aarch64_locals (abfd))
2224 return elf_aarch64_locals (abfd)[r_symndx].got_type;
2227 /* Get the AArch64 elf linker hash table from a link_info structure. */
2228 #define elf_aarch64_hash_table(info) \
2229 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
2231 #define aarch64_stub_hash_lookup(table, string, create, copy) \
2232 ((struct elf_aarch64_stub_hash_entry *) \
2233 bfd_hash_lookup ((table), (string), (create), (copy)))
2235 /* AArch64 ELF linker hash table. */
2236 struct elf_aarch64_link_hash_table
2238 /* The main hash table. */
2239 struct elf_link_hash_table root;
2241 /* Nonzero to force PIC branch veneers. */
2244 /* Fix erratum 835769. */
2245 int fix_erratum_835769;
2247 /* Fix erratum 843419. */
2248 int fix_erratum_843419;
2250 /* Enable ADRP->ADR rewrite for erratum 843419 workaround. */
2251 int fix_erratum_843419_adr;
2253 /* The number of bytes in the initial entry in the PLT. */
2254 bfd_size_type plt_header_size;
2256 /* The number of bytes in the subsequent PLT etries. */
2257 bfd_size_type plt_entry_size;
2259 /* Short-cuts to get to dynamic linker sections. */
2263 /* Small local sym cache. */
2264 struct sym_cache sym_cache;
2266 /* For convenience in allocate_dynrelocs. */
2269 /* The amount of space used by the reserved portion of the sgotplt
2270 section, plus whatever space is used by the jump slots. */
2271 bfd_vma sgotplt_jump_table_size;
2273 /* The stub hash table. */
2274 struct bfd_hash_table stub_hash_table;
2276 /* Linker stub bfd. */
2279 /* Linker call-backs. */
2280 asection *(*add_stub_section) (const char *, asection *);
2281 void (*layout_sections_again) (void);
2283 /* Array to keep track of which stub sections have been created, and
2284 information on stub grouping. */
2287 /* This is the section to which stubs in the group will be
2290 /* The stub section. */
2294 /* Assorted information used by elfNN_aarch64_size_stubs. */
2295 unsigned int bfd_count;
2296 unsigned int top_index;
2297 asection **input_list;
2299 /* The offset into splt of the PLT entry for the TLS descriptor
2300 resolver. Special values are 0, if not necessary (or not found
2301 to be necessary yet), and -1 if needed but not determined
2303 bfd_vma tlsdesc_plt;
2305 /* The GOT offset for the lazy trampoline. Communicated to the
2306 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
2307 indicates an offset is not allocated. */
2308 bfd_vma dt_tlsdesc_got;
2310 /* Used by local STT_GNU_IFUNC symbols. */
2311 htab_t loc_hash_table;
2312 void * loc_hash_memory;
2315 /* Create an entry in an AArch64 ELF linker hash table. */
2317 static struct bfd_hash_entry *
2318 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry *entry,
2319 struct bfd_hash_table *table,
2322 struct elf_aarch64_link_hash_entry *ret =
2323 (struct elf_aarch64_link_hash_entry *) entry;
2325 /* Allocate the structure if it has not already been allocated by a
2328 ret = bfd_hash_allocate (table,
2329 sizeof (struct elf_aarch64_link_hash_entry));
2331 return (struct bfd_hash_entry *) ret;
2333 /* Call the allocation method of the superclass. */
2334 ret = ((struct elf_aarch64_link_hash_entry *)
2335 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
2339 ret->dyn_relocs = NULL;
2340 ret->got_type = GOT_UNKNOWN;
2341 ret->plt_got_offset = (bfd_vma) - 1;
2342 ret->stub_cache = NULL;
2343 ret->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
2346 return (struct bfd_hash_entry *) ret;
2349 /* Initialize an entry in the stub hash table. */
2351 static struct bfd_hash_entry *
2352 stub_hash_newfunc (struct bfd_hash_entry *entry,
2353 struct bfd_hash_table *table, const char *string)
2355 /* Allocate the structure if it has not already been allocated by a
2359 entry = bfd_hash_allocate (table,
2361 elf_aarch64_stub_hash_entry));
2366 /* Call the allocation method of the superclass. */
2367 entry = bfd_hash_newfunc (entry, table, string);
2370 struct elf_aarch64_stub_hash_entry *eh;
2372 /* Initialize the local fields. */
2373 eh = (struct elf_aarch64_stub_hash_entry *) entry;
2374 eh->adrp_offset = 0;
2375 eh->stub_sec = NULL;
2376 eh->stub_offset = 0;
2377 eh->target_value = 0;
2378 eh->target_section = NULL;
2379 eh->stub_type = aarch64_stub_none;
2387 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
2388 for local symbol so that we can handle local STT_GNU_IFUNC symbols
2389 as global symbol. We reuse indx and dynstr_index for local symbol
2390 hash since they aren't used by global symbols in this backend. */
2393 elfNN_aarch64_local_htab_hash (const void *ptr)
2395 struct elf_link_hash_entry *h
2396 = (struct elf_link_hash_entry *) ptr;
2397 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
2400 /* Compare local hash entries. */
2403 elfNN_aarch64_local_htab_eq (const void *ptr1, const void *ptr2)
2405 struct elf_link_hash_entry *h1
2406 = (struct elf_link_hash_entry *) ptr1;
2407 struct elf_link_hash_entry *h2
2408 = (struct elf_link_hash_entry *) ptr2;
2410 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
2413 /* Find and/or create a hash entry for local symbol. */
2415 static struct elf_link_hash_entry *
2416 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table *htab,
2417 bfd *abfd, const Elf_Internal_Rela *rel,
2420 struct elf_aarch64_link_hash_entry e, *ret;
2421 asection *sec = abfd->sections;
2422 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
2423 ELFNN_R_SYM (rel->r_info));
2426 e.root.indx = sec->id;
2427 e.root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2428 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
2429 create ? INSERT : NO_INSERT);
2436 ret = (struct elf_aarch64_link_hash_entry *) *slot;
2440 ret = (struct elf_aarch64_link_hash_entry *)
2441 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
2442 sizeof (struct elf_aarch64_link_hash_entry));
2445 memset (ret, 0, sizeof (*ret));
2446 ret->root.indx = sec->id;
2447 ret->root.dynstr_index = ELFNN_R_SYM (rel->r_info);
2448 ret->root.dynindx = -1;
2454 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2457 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info *info,
2458 struct elf_link_hash_entry *dir,
2459 struct elf_link_hash_entry *ind)
2461 struct elf_aarch64_link_hash_entry *edir, *eind;
2463 edir = (struct elf_aarch64_link_hash_entry *) dir;
2464 eind = (struct elf_aarch64_link_hash_entry *) ind;
2466 if (eind->dyn_relocs != NULL)
2468 if (edir->dyn_relocs != NULL)
2470 struct elf_dyn_relocs **pp;
2471 struct elf_dyn_relocs *p;
2473 /* Add reloc counts against the indirect sym to the direct sym
2474 list. Merge any entries against the same section. */
2475 for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
2477 struct elf_dyn_relocs *q;
2479 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2480 if (q->sec == p->sec)
2482 q->pc_count += p->pc_count;
2483 q->count += p->count;
2490 *pp = edir->dyn_relocs;
2493 edir->dyn_relocs = eind->dyn_relocs;
2494 eind->dyn_relocs = NULL;
2497 if (ind->root.type == bfd_link_hash_indirect)
2499 /* Copy over PLT info. */
2500 if (dir->got.refcount <= 0)
2502 edir->got_type = eind->got_type;
2503 eind->got_type = GOT_UNKNOWN;
2507 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2510 /* Destroy an AArch64 elf linker hash table. */
2513 elfNN_aarch64_link_hash_table_free (bfd *obfd)
2515 struct elf_aarch64_link_hash_table *ret
2516 = (struct elf_aarch64_link_hash_table *) obfd->link.hash;
2518 if (ret->loc_hash_table)
2519 htab_delete (ret->loc_hash_table);
2520 if (ret->loc_hash_memory)
2521 objalloc_free ((struct objalloc *) ret->loc_hash_memory);
2523 bfd_hash_table_free (&ret->stub_hash_table);
2524 _bfd_elf_link_hash_table_free (obfd);
2527 /* Create an AArch64 elf linker hash table. */
2529 static struct bfd_link_hash_table *
2530 elfNN_aarch64_link_hash_table_create (bfd *abfd)
2532 struct elf_aarch64_link_hash_table *ret;
2533 bfd_size_type amt = sizeof (struct elf_aarch64_link_hash_table);
2535 ret = bfd_zmalloc (amt);
2539 if (!_bfd_elf_link_hash_table_init
2540 (&ret->root, abfd, elfNN_aarch64_link_hash_newfunc,
2541 sizeof (struct elf_aarch64_link_hash_entry), AARCH64_ELF_DATA))
2547 ret->plt_header_size = PLT_ENTRY_SIZE;
2548 ret->plt_entry_size = PLT_SMALL_ENTRY_SIZE;
2550 ret->dt_tlsdesc_got = (bfd_vma) - 1;
2552 if (!bfd_hash_table_init (&ret->stub_hash_table, stub_hash_newfunc,
2553 sizeof (struct elf_aarch64_stub_hash_entry)))
2555 _bfd_elf_link_hash_table_free (abfd);
2559 ret->loc_hash_table = htab_try_create (1024,
2560 elfNN_aarch64_local_htab_hash,
2561 elfNN_aarch64_local_htab_eq,
2563 ret->loc_hash_memory = objalloc_create ();
2564 if (!ret->loc_hash_table || !ret->loc_hash_memory)
2566 elfNN_aarch64_link_hash_table_free (abfd);
2569 ret->root.root.hash_table_free = elfNN_aarch64_link_hash_table_free;
2571 return &ret->root.root;
2575 aarch64_relocate (unsigned int r_type, bfd *input_bfd, asection *input_section,
2576 bfd_vma offset, bfd_vma value)
2578 reloc_howto_type *howto;
2581 howto = elfNN_aarch64_howto_from_type (r_type);
2582 place = (input_section->output_section->vma + input_section->output_offset
2585 r_type = elfNN_aarch64_bfd_reloc_from_type (r_type);
2586 value = _bfd_aarch64_elf_resolve_relocation (r_type, place, value, 0, FALSE);
2587 return _bfd_aarch64_elf_put_addend (input_bfd,
2588 input_section->contents + offset, r_type,
2592 static enum elf_aarch64_stub_type
2593 aarch64_select_branch_stub (bfd_vma value, bfd_vma place)
2595 if (aarch64_valid_for_adrp_p (value, place))
2596 return aarch64_stub_adrp_branch;
2597 return aarch64_stub_long_branch;
2600 /* Determine the type of stub needed, if any, for a call. */
2602 static enum elf_aarch64_stub_type
2603 aarch64_type_of_stub (struct bfd_link_info *info,
2604 asection *input_sec,
2605 const Elf_Internal_Rela *rel,
2607 unsigned char st_type,
2608 struct elf_aarch64_link_hash_entry *hash,
2609 bfd_vma destination)
2612 bfd_signed_vma branch_offset;
2613 unsigned int r_type;
2614 struct elf_aarch64_link_hash_table *globals;
2615 enum elf_aarch64_stub_type stub_type = aarch64_stub_none;
2616 bfd_boolean via_plt_p;
2618 if (st_type != STT_FUNC
2619 && (sym_sec != bfd_abs_section_ptr))
2622 globals = elf_aarch64_hash_table (info);
2623 via_plt_p = (globals->root.splt != NULL && hash != NULL
2624 && hash->root.plt.offset != (bfd_vma) - 1);
2625 /* Make sure call to plt stub can fit into the branch range. */
2627 destination = (globals->root.splt->output_section->vma
2628 + globals->root.splt->output_offset
2629 + hash->root.plt.offset);
2631 /* Determine where the call point is. */
2632 location = (input_sec->output_offset
2633 + input_sec->output_section->vma + rel->r_offset);
2635 branch_offset = (bfd_signed_vma) (destination - location);
2637 r_type = ELFNN_R_TYPE (rel->r_info);
2639 /* We don't want to redirect any old unconditional jump in this way,
2640 only one which is being used for a sibcall, where it is
2641 acceptable for the IP0 and IP1 registers to be clobbered. */
2642 if ((r_type == AARCH64_R (CALL26) || r_type == AARCH64_R (JUMP26))
2643 && (branch_offset > AARCH64_MAX_FWD_BRANCH_OFFSET
2644 || branch_offset < AARCH64_MAX_BWD_BRANCH_OFFSET))
2646 stub_type = aarch64_stub_long_branch;
2652 /* Build a name for an entry in the stub hash table. */
2655 elfNN_aarch64_stub_name (const asection *input_section,
2656 const asection *sym_sec,
2657 const struct elf_aarch64_link_hash_entry *hash,
2658 const Elf_Internal_Rela *rel)
2665 len = 8 + 1 + strlen (hash->root.root.root.string) + 1 + 16 + 1;
2666 stub_name = bfd_malloc (len);
2667 if (stub_name != NULL)
2668 snprintf (stub_name, len, "%08x_%s+%" BFD_VMA_FMT "x",
2669 (unsigned int) input_section->id,
2670 hash->root.root.root.string,
2675 len = 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2676 stub_name = bfd_malloc (len);
2677 if (stub_name != NULL)
2678 snprintf (stub_name, len, "%08x_%x:%x+%" BFD_VMA_FMT "x",
2679 (unsigned int) input_section->id,
2680 (unsigned int) sym_sec->id,
2681 (unsigned int) ELFNN_R_SYM (rel->r_info),
2688 /* Look up an entry in the stub hash. Stub entries are cached because
2689 creating the stub name takes a bit of time. */
2691 static struct elf_aarch64_stub_hash_entry *
2692 elfNN_aarch64_get_stub_entry (const asection *input_section,
2693 const asection *sym_sec,
2694 struct elf_link_hash_entry *hash,
2695 const Elf_Internal_Rela *rel,
2696 struct elf_aarch64_link_hash_table *htab)
2698 struct elf_aarch64_stub_hash_entry *stub_entry;
2699 struct elf_aarch64_link_hash_entry *h =
2700 (struct elf_aarch64_link_hash_entry *) hash;
2701 const asection *id_sec;
2703 if ((input_section->flags & SEC_CODE) == 0)
2706 /* If this input section is part of a group of sections sharing one
2707 stub section, then use the id of the first section in the group.
2708 Stub names need to include a section id, as there may well be
2709 more than one stub used to reach say, printf, and we need to
2710 distinguish between them. */
2711 id_sec = htab->stub_group[input_section->id].link_sec;
2713 if (h != NULL && h->stub_cache != NULL
2714 && h->stub_cache->h == h && h->stub_cache->id_sec == id_sec)
2716 stub_entry = h->stub_cache;
2722 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, h, rel);
2723 if (stub_name == NULL)
2726 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table,
2727 stub_name, FALSE, FALSE);
2729 h->stub_cache = stub_entry;
2738 /* Create a stub section. */
2741 _bfd_aarch64_create_stub_section (asection *section,
2742 struct elf_aarch64_link_hash_table *htab)
2748 namelen = strlen (section->name);
2749 len = namelen + sizeof (STUB_SUFFIX);
2750 s_name = bfd_alloc (htab->stub_bfd, len);
2754 memcpy (s_name, section->name, namelen);
2755 memcpy (s_name + namelen, STUB_SUFFIX, sizeof (STUB_SUFFIX));
2756 return (*htab->add_stub_section) (s_name, section);
2760 /* Find or create a stub section for a link section.
2762 Fix or create the stub section used to collect stubs attached to
2763 the specified link section. */
2766 _bfd_aarch64_get_stub_for_link_section (asection *link_section,
2767 struct elf_aarch64_link_hash_table *htab)
2769 if (htab->stub_group[link_section->id].stub_sec == NULL)
2770 htab->stub_group[link_section->id].stub_sec
2771 = _bfd_aarch64_create_stub_section (link_section, htab);
2772 return htab->stub_group[link_section->id].stub_sec;
2776 /* Find or create a stub section in the stub group for an input
2780 _bfd_aarch64_create_or_find_stub_sec (asection *section,
2781 struct elf_aarch64_link_hash_table *htab)
2783 asection *link_sec = htab->stub_group[section->id].link_sec;
2784 return _bfd_aarch64_get_stub_for_link_section (link_sec, htab);
2788 /* Add a new stub entry in the stub group associated with an input
2789 section to the stub hash. Not all fields of the new stub entry are
2792 static struct elf_aarch64_stub_hash_entry *
2793 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name,
2795 struct elf_aarch64_link_hash_table *htab)
2799 struct elf_aarch64_stub_hash_entry *stub_entry;
2801 link_sec = htab->stub_group[section->id].link_sec;
2802 stub_sec = _bfd_aarch64_create_or_find_stub_sec (section, htab);
2804 /* Enter this entry into the linker stub hash table. */
2805 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2807 if (stub_entry == NULL)
2809 (*_bfd_error_handler) (_("%s: cannot create stub entry %s"),
2810 section->owner, stub_name);
2814 stub_entry->stub_sec = stub_sec;
2815 stub_entry->stub_offset = 0;
2816 stub_entry->id_sec = link_sec;
2821 /* Add a new stub entry in the final stub section to the stub hash.
2822 Not all fields of the new stub entry are initialised. */
2824 static struct elf_aarch64_stub_hash_entry *
2825 _bfd_aarch64_add_stub_entry_after (const char *stub_name,
2826 asection *link_section,
2827 struct elf_aarch64_link_hash_table *htab)
2830 struct elf_aarch64_stub_hash_entry *stub_entry;
2832 stub_sec = _bfd_aarch64_get_stub_for_link_section (link_section, htab);
2833 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
2835 if (stub_entry == NULL)
2837 (*_bfd_error_handler) (_("cannot create stub entry %s"), stub_name);
2841 stub_entry->stub_sec = stub_sec;
2842 stub_entry->stub_offset = 0;
2843 stub_entry->id_sec = link_section;
2850 aarch64_build_one_stub (struct bfd_hash_entry *gen_entry,
2851 void *in_arg ATTRIBUTE_UNUSED)
2853 struct elf_aarch64_stub_hash_entry *stub_entry;
2858 bfd_vma veneered_insn_loc;
2859 bfd_vma veneer_entry_loc;
2860 bfd_signed_vma branch_offset = 0;
2861 unsigned int template_size;
2862 const uint32_t *template;
2865 /* Massage our args to the form they really have. */
2866 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2868 stub_sec = stub_entry->stub_sec;
2870 /* Make a note of the offset within the stubs for this entry. */
2871 stub_entry->stub_offset = stub_sec->size;
2872 loc = stub_sec->contents + stub_entry->stub_offset;
2874 stub_bfd = stub_sec->owner;
2876 /* This is the address of the stub destination. */
2877 sym_value = (stub_entry->target_value
2878 + stub_entry->target_section->output_offset
2879 + stub_entry->target_section->output_section->vma);
2881 if (stub_entry->stub_type == aarch64_stub_long_branch)
2883 bfd_vma place = (stub_entry->stub_offset + stub_sec->output_section->vma
2884 + stub_sec->output_offset);
2886 /* See if we can relax the stub. */
2887 if (aarch64_valid_for_adrp_p (sym_value, place))
2888 stub_entry->stub_type = aarch64_select_branch_stub (sym_value, place);
2891 switch (stub_entry->stub_type)
2893 case aarch64_stub_adrp_branch:
2894 template = aarch64_adrp_branch_stub;
2895 template_size = sizeof (aarch64_adrp_branch_stub);
2897 case aarch64_stub_long_branch:
2898 template = aarch64_long_branch_stub;
2899 template_size = sizeof (aarch64_long_branch_stub);
2901 case aarch64_stub_erratum_835769_veneer:
2902 template = aarch64_erratum_835769_stub;
2903 template_size = sizeof (aarch64_erratum_835769_stub);
2905 case aarch64_stub_erratum_843419_veneer:
2906 template = aarch64_erratum_843419_stub;
2907 template_size = sizeof (aarch64_erratum_843419_stub);
2913 for (i = 0; i < (template_size / sizeof template[0]); i++)
2915 bfd_putl32 (template[i], loc);
2919 template_size = (template_size + 7) & ~7;
2920 stub_sec->size += template_size;
2922 switch (stub_entry->stub_type)
2924 case aarch64_stub_adrp_branch:
2925 if (aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21), stub_bfd, stub_sec,
2926 stub_entry->stub_offset, sym_value))
2927 /* The stub would not have been relaxed if the offset was out
2931 if (aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC), stub_bfd, stub_sec,
2932 stub_entry->stub_offset + 4, sym_value))
2936 case aarch64_stub_long_branch:
2937 /* We want the value relative to the address 12 bytes back from the
2939 if (aarch64_relocate (AARCH64_R (PRELNN), stub_bfd, stub_sec,
2940 stub_entry->stub_offset + 16, sym_value + 12))
2944 case aarch64_stub_erratum_835769_veneer:
2945 veneered_insn_loc = stub_entry->target_section->output_section->vma
2946 + stub_entry->target_section->output_offset
2947 + stub_entry->target_value;
2948 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
2949 + stub_entry->stub_sec->output_offset
2950 + stub_entry->stub_offset;
2951 branch_offset = veneered_insn_loc - veneer_entry_loc;
2952 branch_offset >>= 2;
2953 branch_offset &= 0x3ffffff;
2954 bfd_putl32 (stub_entry->veneered_insn,
2955 stub_sec->contents + stub_entry->stub_offset);
2956 bfd_putl32 (template[1] | branch_offset,
2957 stub_sec->contents + stub_entry->stub_offset + 4);
2960 case aarch64_stub_erratum_843419_veneer:
2961 if (aarch64_relocate (AARCH64_R (JUMP26), stub_bfd, stub_sec,
2962 stub_entry->stub_offset + 4, sym_value + 4))
2973 /* As above, but don't actually build the stub. Just bump offset so
2974 we know stub section sizes. */
2977 aarch64_size_one_stub (struct bfd_hash_entry *gen_entry,
2978 void *in_arg ATTRIBUTE_UNUSED)
2980 struct elf_aarch64_stub_hash_entry *stub_entry;
2983 /* Massage our args to the form they really have. */
2984 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
2986 switch (stub_entry->stub_type)
2988 case aarch64_stub_adrp_branch:
2989 size = sizeof (aarch64_adrp_branch_stub);
2991 case aarch64_stub_long_branch:
2992 size = sizeof (aarch64_long_branch_stub);
2994 case aarch64_stub_erratum_835769_veneer:
2995 size = sizeof (aarch64_erratum_835769_stub);
2997 case aarch64_stub_erratum_843419_veneer:
2998 size = sizeof (aarch64_erratum_843419_stub);
3004 size = (size + 7) & ~7;
3005 stub_entry->stub_sec->size += size;
3009 /* External entry points for sizing and building linker stubs. */
3011 /* Set up various things so that we can make a list of input sections
3012 for each output section included in the link. Returns -1 on error,
3013 0 when no stubs will be needed, and 1 on success. */
3016 elfNN_aarch64_setup_section_lists (bfd *output_bfd,
3017 struct bfd_link_info *info)
3020 unsigned int bfd_count;
3021 unsigned int top_id, top_index;
3023 asection **input_list, **list;
3025 struct elf_aarch64_link_hash_table *htab =
3026 elf_aarch64_hash_table (info);
3028 if (!is_elf_hash_table (htab))
3031 /* Count the number of input BFDs and find the top input section id. */
3032 for (input_bfd = info->input_bfds, bfd_count = 0, top_id = 0;
3033 input_bfd != NULL; input_bfd = input_bfd->link.next)
3036 for (section = input_bfd->sections;
3037 section != NULL; section = section->next)
3039 if (top_id < section->id)
3040 top_id = section->id;
3043 htab->bfd_count = bfd_count;
3045 amt = sizeof (struct map_stub) * (top_id + 1);
3046 htab->stub_group = bfd_zmalloc (amt);
3047 if (htab->stub_group == NULL)
3050 /* We can't use output_bfd->section_count here to find the top output
3051 section index as some sections may have been removed, and
3052 _bfd_strip_section_from_output doesn't renumber the indices. */
3053 for (section = output_bfd->sections, top_index = 0;
3054 section != NULL; section = section->next)
3056 if (top_index < section->index)
3057 top_index = section->index;
3060 htab->top_index = top_index;
3061 amt = sizeof (asection *) * (top_index + 1);
3062 input_list = bfd_malloc (amt);
3063 htab->input_list = input_list;
3064 if (input_list == NULL)
3067 /* For sections we aren't interested in, mark their entries with a
3068 value we can check later. */
3069 list = input_list + top_index;
3071 *list = bfd_abs_section_ptr;
3072 while (list-- != input_list);
3074 for (section = output_bfd->sections;
3075 section != NULL; section = section->next)
3077 if ((section->flags & SEC_CODE) != 0)
3078 input_list[section->index] = NULL;
3084 /* Used by elfNN_aarch64_next_input_section and group_sections. */
3085 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3087 /* The linker repeatedly calls this function for each input section,
3088 in the order that input sections are linked into output sections.
3089 Build lists of input sections to determine groupings between which
3090 we may insert linker stubs. */
3093 elfNN_aarch64_next_input_section (struct bfd_link_info *info, asection *isec)
3095 struct elf_aarch64_link_hash_table *htab =
3096 elf_aarch64_hash_table (info);
3098 if (isec->output_section->index <= htab->top_index)
3100 asection **list = htab->input_list + isec->output_section->index;
3102 if (*list != bfd_abs_section_ptr)
3104 /* Steal the link_sec pointer for our list. */
3105 /* This happens to make the list in reverse order,
3106 which is what we want. */
3107 PREV_SEC (isec) = *list;
3113 /* See whether we can group stub sections together. Grouping stub
3114 sections may result in fewer stubs. More importantly, we need to
3115 put all .init* and .fini* stubs at the beginning of the .init or
3116 .fini output sections respectively, because glibc splits the
3117 _init and _fini functions into multiple parts. Putting a stub in
3118 the middle of a function is not a good idea. */
3121 group_sections (struct elf_aarch64_link_hash_table *htab,
3122 bfd_size_type stub_group_size,
3123 bfd_boolean stubs_always_before_branch)
3125 asection **list = htab->input_list + htab->top_index;
3129 asection *tail = *list;
3131 if (tail == bfd_abs_section_ptr)
3134 while (tail != NULL)
3138 bfd_size_type total;
3142 while ((prev = PREV_SEC (curr)) != NULL
3143 && ((total += curr->output_offset - prev->output_offset)
3147 /* OK, the size from the start of CURR to the end is less
3148 than stub_group_size and thus can be handled by one stub
3149 section. (Or the tail section is itself larger than
3150 stub_group_size, in which case we may be toast.)
3151 We should really be keeping track of the total size of
3152 stubs added here, as stubs contribute to the final output
3156 prev = PREV_SEC (tail);
3157 /* Set up this stub group. */
3158 htab->stub_group[tail->id].link_sec = curr;
3160 while (tail != curr && (tail = prev) != NULL);
3162 /* But wait, there's more! Input sections up to stub_group_size
3163 bytes before the stub section can be handled by it too. */
3164 if (!stubs_always_before_branch)
3168 && ((total += tail->output_offset - prev->output_offset)
3172 prev = PREV_SEC (tail);
3173 htab->stub_group[tail->id].link_sec = curr;
3179 while (list-- != htab->input_list);
3181 free (htab->input_list);
3186 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
3188 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
3189 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
3190 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
3191 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
3192 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
3193 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
3195 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
3196 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
3197 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
3198 #define AARCH64_ZR 0x1f
3200 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
3201 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
3203 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
3204 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
3205 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
3206 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
3207 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
3208 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
3209 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
3210 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
3211 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
3212 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
3213 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
3214 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
3215 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
3216 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
3217 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
3218 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
3219 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
3220 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
3222 /* Classify an INSN if it is indeed a load/store.
3224 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
3226 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
3229 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned.
3234 aarch64_mem_op_p (uint32_t insn, unsigned int *rt, unsigned int *rt2,
3235 bfd_boolean *pair, bfd_boolean *load)
3243 /* Bail out quickly if INSN doesn't fall into the the load-store
3245 if (!AARCH64_LDST (insn))
3250 if (AARCH64_LDST_EX (insn))
3252 *rt = AARCH64_RT (insn);
3254 if (AARCH64_BIT (insn, 21) == 1)
3257 *rt2 = AARCH64_RT2 (insn);
3259 *load = AARCH64_LD (insn);
3262 else if (AARCH64_LDST_NAP (insn)
3263 || AARCH64_LDSTP_PI (insn)
3264 || AARCH64_LDSTP_O (insn)
3265 || AARCH64_LDSTP_PRE (insn))
3268 *rt = AARCH64_RT (insn);
3269 *rt2 = AARCH64_RT2 (insn);
3270 *load = AARCH64_LD (insn);
3273 else if (AARCH64_LDST_PCREL (insn)
3274 || AARCH64_LDST_UI (insn)
3275 || AARCH64_LDST_PIIMM (insn)
3276 || AARCH64_LDST_U (insn)
3277 || AARCH64_LDST_PREIMM (insn)
3278 || AARCH64_LDST_RO (insn)
3279 || AARCH64_LDST_UIMM (insn))
3281 *rt = AARCH64_RT (insn);
3283 if (AARCH64_LDST_PCREL (insn))
3285 opc = AARCH64_BITS (insn, 22, 2);
3286 v = AARCH64_BIT (insn, 26);
3287 opc_v = opc | (v << 2);
3288 *load = (opc_v == 1 || opc_v == 2 || opc_v == 3
3289 || opc_v == 5 || opc_v == 7);
3292 else if (AARCH64_LDST_SIMD_M (insn)
3293 || AARCH64_LDST_SIMD_M_PI (insn))
3295 *rt = AARCH64_RT (insn);
3296 *load = AARCH64_BIT (insn, 22);
3297 opcode = (insn >> 12) & 0xf;
3324 else if (AARCH64_LDST_SIMD_S (insn)
3325 || AARCH64_LDST_SIMD_S_PI (insn))
3327 *rt = AARCH64_RT (insn);
3328 r = (insn >> 21) & 1;
3329 *load = AARCH64_BIT (insn, 22);
3330 opcode = (insn >> 13) & 0x7;
3342 *rt2 = *rt + (r == 0 ? 2 : 3);
3350 *rt2 = *rt + (r == 0 ? 2 : 3);
3362 /* Return TRUE if INSN is multiply-accumulate. */
3365 aarch64_mlxl_p (uint32_t insn)
3367 uint32_t op31 = AARCH64_OP31 (insn);
3369 if (AARCH64_MAC (insn)
3370 && (op31 == 0 || op31 == 1 || op31 == 5)
3371 /* Exclude MUL instructions which are encoded as a multiple accumulate
3373 && AARCH64_RA (insn) != AARCH64_ZR)
3379 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
3380 it is possible for a 64-bit multiply-accumulate instruction to generate an
3381 incorrect result. The details are quite complex and hard to
3382 determine statically, since branches in the code may exist in some
3383 circumstances, but all cases end with a memory (load, store, or
3384 prefetch) instruction followed immediately by the multiply-accumulate
3385 operation. We employ a linker patching technique, by moving the potentially
3386 affected multiply-accumulate instruction into a patch region and replacing
3387 the original instruction with a branch to the patch. This function checks
3388 if INSN_1 is the memory operation followed by a multiply-accumulate
3389 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
3390 if INSN_1 and INSN_2 are safe. */
3393 aarch64_erratum_sequence (uint32_t insn_1, uint32_t insn_2)
3403 if (aarch64_mlxl_p (insn_2)
3404 && aarch64_mem_op_p (insn_1, &rt, &rt2, &pair, &load))
3406 /* Any SIMD memory op is independent of the subsequent MLA
3407 by definition of the erratum. */
3408 if (AARCH64_BIT (insn_1, 26))
3411 /* If not SIMD, check for integer memory ops and MLA relationship. */
3412 rn = AARCH64_RN (insn_2);
3413 ra = AARCH64_RA (insn_2);
3414 rm = AARCH64_RM (insn_2);
3416 /* If this is a load and there's a true(RAW) dependency, we are safe
3417 and this is not an erratum sequence. */
3419 (rt == rn || rt == rm || rt == ra
3420 || (pair && (rt2 == rn || rt2 == rm || rt2 == ra))))
3423 /* We conservatively put out stubs for all other cases (including
3431 /* Used to order a list of mapping symbols by address. */
3434 elf_aarch64_compare_mapping (const void *a, const void *b)
3436 const elf_aarch64_section_map *amap = (const elf_aarch64_section_map *) a;
3437 const elf_aarch64_section_map *bmap = (const elf_aarch64_section_map *) b;
3439 if (amap->vma > bmap->vma)
3441 else if (amap->vma < bmap->vma)
3443 else if (amap->type > bmap->type)
3444 /* Ensure results do not depend on the host qsort for objects with
3445 multiple mapping symbols at the same address by sorting on type
3448 else if (amap->type < bmap->type)
3456 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes)
3458 char *stub_name = (char *) bfd_malloc
3459 (strlen ("__erratum_835769_veneer_") + 16);
3460 sprintf (stub_name,"__erratum_835769_veneer_%d", num_fixes);
3464 /* Scan for Cortex-A53 erratum 835769 sequence.
3466 Return TRUE else FALSE on abnormal termination. */
3469 _bfd_aarch64_erratum_835769_scan (bfd *input_bfd,
3470 struct bfd_link_info *info,
3471 unsigned int *num_fixes_p)
3474 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3475 unsigned int num_fixes = *num_fixes_p;
3480 for (section = input_bfd->sections;
3482 section = section->next)
3484 bfd_byte *contents = NULL;
3485 struct _aarch64_elf_section_data *sec_data;
3488 if (elf_section_type (section) != SHT_PROGBITS
3489 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
3490 || (section->flags & SEC_EXCLUDE) != 0
3491 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
3492 || (section->output_section == bfd_abs_section_ptr))
3495 if (elf_section_data (section)->this_hdr.contents != NULL)
3496 contents = elf_section_data (section)->this_hdr.contents;
3497 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
3500 sec_data = elf_aarch64_section_data (section);
3502 qsort (sec_data->map, sec_data->mapcount,
3503 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3505 for (span = 0; span < sec_data->mapcount; span++)
3507 unsigned int span_start = sec_data->map[span].vma;
3508 unsigned int span_end = ((span == sec_data->mapcount - 1)
3509 ? sec_data->map[0].vma + section->size
3510 : sec_data->map[span + 1].vma);
3512 char span_type = sec_data->map[span].type;
3514 if (span_type == 'd')
3517 for (i = span_start; i + 4 < span_end; i += 4)
3519 uint32_t insn_1 = bfd_getl32 (contents + i);
3520 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3522 if (aarch64_erratum_sequence (insn_1, insn_2))
3524 struct elf_aarch64_stub_hash_entry *stub_entry;
3525 char *stub_name = _bfd_aarch64_erratum_835769_stub_name (num_fixes);
3529 stub_entry = _bfd_aarch64_add_stub_entry_in_group (stub_name,
3535 stub_entry->stub_type = aarch64_stub_erratum_835769_veneer;
3536 stub_entry->target_section = section;
3537 stub_entry->target_value = i + 4;
3538 stub_entry->veneered_insn = insn_2;
3539 stub_entry->output_name = stub_name;
3544 if (elf_section_data (section)->this_hdr.contents == NULL)
3548 *num_fixes_p = num_fixes;
3554 /* Test if instruction INSN is ADRP. */
3557 _bfd_aarch64_adrp_p (uint32_t insn)
3559 return ((insn & 0x9f000000) == 0x90000000);
3563 /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */
3566 _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1, uint32_t insn_2,
3574 return (aarch64_mem_op_p (insn_2, &rt, &rt2, &pair, &load)
3577 && AARCH64_LDST_UIMM (insn_3)
3578 && AARCH64_RN (insn_3) == AARCH64_RD (insn_1));
3582 /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence.
3584 Return TRUE if section CONTENTS at offset I contains one of the
3585 erratum 843419 sequences, otherwise return FALSE. If a sequence is
3586 seen set P_VENEER_I to the offset of the final LOAD/STORE
3587 instruction in the sequence.
3591 _bfd_aarch64_erratum_843419_p (bfd_byte *contents, bfd_vma vma,
3592 bfd_vma i, bfd_vma span_end,
3593 bfd_vma *p_veneer_i)
3595 uint32_t insn_1 = bfd_getl32 (contents + i);
3597 if (!_bfd_aarch64_adrp_p (insn_1))
3600 if (span_end < i + 12)
3603 uint32_t insn_2 = bfd_getl32 (contents + i + 4);
3604 uint32_t insn_3 = bfd_getl32 (contents + i + 8);
3606 if ((vma & 0xfff) != 0xff8 && (vma & 0xfff) != 0xffc)
3609 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_3))
3611 *p_veneer_i = i + 8;
3615 if (span_end < i + 16)
3618 uint32_t insn_4 = bfd_getl32 (contents + i + 12);
3620 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1, insn_2, insn_4))
3622 *p_veneer_i = i + 12;
3630 /* Resize all stub sections. */
3633 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table *htab)
3637 /* OK, we've added some stubs. Find out the new size of the
3639 for (section = htab->stub_bfd->sections;
3640 section != NULL; section = section->next)
3642 /* Ignore non-stub sections. */
3643 if (!strstr (section->name, STUB_SUFFIX))
3648 bfd_hash_traverse (&htab->stub_hash_table, aarch64_size_one_stub, htab);
3650 for (section = htab->stub_bfd->sections;
3651 section != NULL; section = section->next)
3653 if (!strstr (section->name, STUB_SUFFIX))
3659 /* Ensure all stub sections have a size which is a multiple of
3660 4096. This is important in order to ensure that the insertion
3661 of stub sections does not in itself move existing code around
3662 in such a way that new errata sequences are created. */
3663 if (htab->fix_erratum_843419)
3665 section->size = BFD_ALIGN (section->size, 0x1000);
3670 /* Construct an erratum 843419 workaround stub name.
3674 _bfd_aarch64_erratum_843419_stub_name (asection *input_section,
3677 const bfd_size_type len = 8 + 4 + 1 + 8 + 1 + 16 + 1;
3678 char *stub_name = bfd_malloc (len);
3680 if (stub_name != NULL)
3681 snprintf (stub_name, len, "e843419@%04x_%08x_%" BFD_VMA_FMT "x",
3682 input_section->owner->id,
3688 /* Build a stub_entry structure describing an 843419 fixup.
3690 The stub_entry constructed is populated with the bit pattern INSN
3691 of the instruction located at OFFSET within input SECTION.
3693 Returns TRUE on success. */
3696 _bfd_aarch64_erratum_843419_fixup (uint32_t insn,
3697 bfd_vma adrp_offset,
3698 bfd_vma ldst_offset,
3700 struct bfd_link_info *info)
3702 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3704 struct elf_aarch64_stub_hash_entry *stub_entry;
3706 stub_name = _bfd_aarch64_erratum_843419_stub_name (section, ldst_offset);
3707 stub_entry = aarch64_stub_hash_lookup (&htab->stub_hash_table, stub_name,
3715 /* We always place an 843419 workaround veneer in the stub section
3716 attached to the input section in which an erratum sequence has
3717 been found. This ensures that later in the link process (in
3718 elfNN_aarch64_write_section) when we copy the veneered
3719 instruction from the input section into the stub section the
3720 copied instruction will have had any relocations applied to it.
3721 If we placed workaround veneers in any other stub section then we
3722 could not assume that all relocations have been processed on the
3723 corresponding input section at the point we output the stub
3727 stub_entry = _bfd_aarch64_add_stub_entry_after (stub_name, section, htab);
3728 if (stub_entry == NULL)
3734 stub_entry->adrp_offset = adrp_offset;
3735 stub_entry->target_value = ldst_offset;
3736 stub_entry->target_section = section;
3737 stub_entry->stub_type = aarch64_stub_erratum_843419_veneer;
3738 stub_entry->veneered_insn = insn;
3739 stub_entry->output_name = stub_name;
3745 /* Scan an input section looking for the signature of erratum 843419.
3747 Scans input SECTION in INPUT_BFD looking for erratum 843419
3748 signatures, for each signature found a stub_entry is created
3749 describing the location of the erratum for subsequent fixup.
3751 Return TRUE on successful scan, FALSE on failure to scan.
3755 _bfd_aarch64_erratum_843419_scan (bfd *input_bfd, asection *section,
3756 struct bfd_link_info *info)
3758 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3763 if (elf_section_type (section) != SHT_PROGBITS
3764 || (elf_section_flags (section) & SHF_EXECINSTR) == 0
3765 || (section->flags & SEC_EXCLUDE) != 0
3766 || (section->sec_info_type == SEC_INFO_TYPE_JUST_SYMS)
3767 || (section->output_section == bfd_abs_section_ptr))
3772 bfd_byte *contents = NULL;
3773 struct _aarch64_elf_section_data *sec_data;
3776 if (elf_section_data (section)->this_hdr.contents != NULL)
3777 contents = elf_section_data (section)->this_hdr.contents;
3778 else if (! bfd_malloc_and_get_section (input_bfd, section, &contents))
3781 sec_data = elf_aarch64_section_data (section);
3783 qsort (sec_data->map, sec_data->mapcount,
3784 sizeof (elf_aarch64_section_map), elf_aarch64_compare_mapping);
3786 for (span = 0; span < sec_data->mapcount; span++)
3788 unsigned int span_start = sec_data->map[span].vma;
3789 unsigned int span_end = ((span == sec_data->mapcount - 1)
3790 ? sec_data->map[0].vma + section->size
3791 : sec_data->map[span + 1].vma);
3793 char span_type = sec_data->map[span].type;
3795 if (span_type == 'd')
3798 for (i = span_start; i + 8 < span_end; i += 4)
3800 bfd_vma vma = (section->output_section->vma
3801 + section->output_offset
3805 if (_bfd_aarch64_erratum_843419_p
3806 (contents, vma, i, span_end, &veneer_i))
3808 uint32_t insn = bfd_getl32 (contents + veneer_i);
3810 if (!_bfd_aarch64_erratum_843419_fixup (insn, i, veneer_i,
3817 if (elf_section_data (section)->this_hdr.contents == NULL)
3826 /* Determine and set the size of the stub section for a final link.
3828 The basic idea here is to examine all the relocations looking for
3829 PC-relative calls to a target that is unreachable with a "bl"
3833 elfNN_aarch64_size_stubs (bfd *output_bfd,
3835 struct bfd_link_info *info,
3836 bfd_signed_vma group_size,
3837 asection * (*add_stub_section) (const char *,
3839 void (*layout_sections_again) (void))
3841 bfd_size_type stub_group_size;
3842 bfd_boolean stubs_always_before_branch;
3843 bfd_boolean stub_changed = FALSE;
3844 struct elf_aarch64_link_hash_table *htab = elf_aarch64_hash_table (info);
3845 unsigned int num_erratum_835769_fixes = 0;
3847 /* Propagate mach to stub bfd, because it may not have been
3848 finalized when we created stub_bfd. */
3849 bfd_set_arch_mach (stub_bfd, bfd_get_arch (output_bfd),
3850 bfd_get_mach (output_bfd));
3852 /* Stash our params away. */
3853 htab->stub_bfd = stub_bfd;
3854 htab->add_stub_section = add_stub_section;
3855 htab->layout_sections_again = layout_sections_again;
3856 stubs_always_before_branch = group_size < 0;
3858 stub_group_size = -group_size;
3860 stub_group_size = group_size;
3862 if (stub_group_size == 1)
3864 /* Default values. */
3865 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
3866 stub_group_size = 127 * 1024 * 1024;
3869 group_sections (htab, stub_group_size, stubs_always_before_branch);
3871 (*htab->layout_sections_again) ();
3873 if (htab->fix_erratum_835769)
3877 for (input_bfd = info->input_bfds;
3878 input_bfd != NULL; input_bfd = input_bfd->link.next)
3879 if (!_bfd_aarch64_erratum_835769_scan (input_bfd, info,
3880 &num_erratum_835769_fixes))
3883 _bfd_aarch64_resize_stubs (htab);
3884 (*htab->layout_sections_again) ();
3887 if (htab->fix_erratum_843419)
3891 for (input_bfd = info->input_bfds;
3893 input_bfd = input_bfd->link.next)
3897 for (section = input_bfd->sections;
3899 section = section->next)
3900 if (!_bfd_aarch64_erratum_843419_scan (input_bfd, section, info))
3904 _bfd_aarch64_resize_stubs (htab);
3905 (*htab->layout_sections_again) ();
3912 for (input_bfd = info->input_bfds;
3913 input_bfd != NULL; input_bfd = input_bfd->link.next)
3915 Elf_Internal_Shdr *symtab_hdr;
3917 Elf_Internal_Sym *local_syms = NULL;
3919 /* We'll need the symbol table in a second. */
3920 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
3921 if (symtab_hdr->sh_info == 0)
3924 /* Walk over each section attached to the input bfd. */
3925 for (section = input_bfd->sections;
3926 section != NULL; section = section->next)
3928 Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
3930 /* If there aren't any relocs, then there's nothing more
3932 if ((section->flags & SEC_RELOC) == 0
3933 || section->reloc_count == 0
3934 || (section->flags & SEC_CODE) == 0)
3937 /* If this section is a link-once section that will be
3938 discarded, then don't create any stubs. */
3939 if (section->output_section == NULL
3940 || section->output_section->owner != output_bfd)
3943 /* Get the relocs. */
3945 = _bfd_elf_link_read_relocs (input_bfd, section, NULL,
3946 NULL, info->keep_memory);
3947 if (internal_relocs == NULL)
3948 goto error_ret_free_local;
3950 /* Now examine each relocation. */
3951 irela = internal_relocs;
3952 irelaend = irela + section->reloc_count;
3953 for (; irela < irelaend; irela++)
3955 unsigned int r_type, r_indx;
3956 enum elf_aarch64_stub_type stub_type;
3957 struct elf_aarch64_stub_hash_entry *stub_entry;
3960 bfd_vma destination;
3961 struct elf_aarch64_link_hash_entry *hash;
3962 const char *sym_name;
3964 const asection *id_sec;
3965 unsigned char st_type;
3968 r_type = ELFNN_R_TYPE (irela->r_info);
3969 r_indx = ELFNN_R_SYM (irela->r_info);
3971 if (r_type >= (unsigned int) R_AARCH64_end)
3973 bfd_set_error (bfd_error_bad_value);
3974 error_ret_free_internal:
3975 if (elf_section_data (section)->relocs == NULL)
3976 free (internal_relocs);
3977 goto error_ret_free_local;
3980 /* Only look for stubs on unconditional branch and
3981 branch and link instructions. */
3982 if (r_type != (unsigned int) AARCH64_R (CALL26)
3983 && r_type != (unsigned int) AARCH64_R (JUMP26))
3986 /* Now determine the call target, its name, value,
3993 if (r_indx < symtab_hdr->sh_info)
3995 /* It's a local symbol. */
3996 Elf_Internal_Sym *sym;
3997 Elf_Internal_Shdr *hdr;
3999 if (local_syms == NULL)
4002 = (Elf_Internal_Sym *) symtab_hdr->contents;
4003 if (local_syms == NULL)
4005 = bfd_elf_get_elf_syms (input_bfd, symtab_hdr,
4006 symtab_hdr->sh_info, 0,
4008 if (local_syms == NULL)
4009 goto error_ret_free_internal;
4012 sym = local_syms + r_indx;
4013 hdr = elf_elfsections (input_bfd)[sym->st_shndx];
4014 sym_sec = hdr->bfd_section;
4016 /* This is an undefined symbol. It can never
4020 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
4021 sym_value = sym->st_value;
4022 destination = (sym_value + irela->r_addend
4023 + sym_sec->output_offset
4024 + sym_sec->output_section->vma);
4025 st_type = ELF_ST_TYPE (sym->st_info);
4027 = bfd_elf_string_from_elf_section (input_bfd,
4028 symtab_hdr->sh_link,
4035 e_indx = r_indx - symtab_hdr->sh_info;
4036 hash = ((struct elf_aarch64_link_hash_entry *)
4037 elf_sym_hashes (input_bfd)[e_indx]);
4039 while (hash->root.root.type == bfd_link_hash_indirect
4040 || hash->root.root.type == bfd_link_hash_warning)
4041 hash = ((struct elf_aarch64_link_hash_entry *)
4042 hash->root.root.u.i.link);
4044 if (hash->root.root.type == bfd_link_hash_defined
4045 || hash->root.root.type == bfd_link_hash_defweak)
4047 struct elf_aarch64_link_hash_table *globals =
4048 elf_aarch64_hash_table (info);
4049 sym_sec = hash->root.root.u.def.section;
4050 sym_value = hash->root.root.u.def.value;
4051 /* For a destination in a shared library,
4052 use the PLT stub as target address to
4053 decide whether a branch stub is
4055 if (globals->root.splt != NULL && hash != NULL
4056 && hash->root.plt.offset != (bfd_vma) - 1)
4058 sym_sec = globals->root.splt;
4059 sym_value = hash->root.plt.offset;
4060 if (sym_sec->output_section != NULL)
4061 destination = (sym_value
4062 + sym_sec->output_offset
4064 sym_sec->output_section->vma);
4066 else if (sym_sec->output_section != NULL)
4067 destination = (sym_value + irela->r_addend
4068 + sym_sec->output_offset
4069 + sym_sec->output_section->vma);
4071 else if (hash->root.root.type == bfd_link_hash_undefined
4072 || (hash->root.root.type
4073 == bfd_link_hash_undefweak))
4075 /* For a shared library, use the PLT stub as
4076 target address to decide whether a long
4077 branch stub is needed.
4078 For absolute code, they cannot be handled. */
4079 struct elf_aarch64_link_hash_table *globals =
4080 elf_aarch64_hash_table (info);
4082 if (globals->root.splt != NULL && hash != NULL
4083 && hash->root.plt.offset != (bfd_vma) - 1)
4085 sym_sec = globals->root.splt;
4086 sym_value = hash->root.plt.offset;
4087 if (sym_sec->output_section != NULL)
4088 destination = (sym_value
4089 + sym_sec->output_offset
4091 sym_sec->output_section->vma);
4098 bfd_set_error (bfd_error_bad_value);
4099 goto error_ret_free_internal;
4101 st_type = ELF_ST_TYPE (hash->root.type);
4102 sym_name = hash->root.root.root.string;
4105 /* Determine what (if any) linker stub is needed. */
4106 stub_type = aarch64_type_of_stub
4107 (info, section, irela, sym_sec, st_type, hash, destination);
4108 if (stub_type == aarch64_stub_none)
4111 /* Support for grouping stub sections. */
4112 id_sec = htab->stub_group[section->id].link_sec;
4114 /* Get the name of this stub. */
4115 stub_name = elfNN_aarch64_stub_name (id_sec, sym_sec, hash,
4118 goto error_ret_free_internal;
4121 aarch64_stub_hash_lookup (&htab->stub_hash_table,
4122 stub_name, FALSE, FALSE);
4123 if (stub_entry != NULL)
4125 /* The proper stub has already been created. */
4130 stub_entry = _bfd_aarch64_add_stub_entry_in_group
4131 (stub_name, section, htab);
4132 if (stub_entry == NULL)
4135 goto error_ret_free_internal;
4138 stub_entry->target_value = sym_value;
4139 stub_entry->target_section = sym_sec;
4140 stub_entry->stub_type = stub_type;
4141 stub_entry->h = hash;
4142 stub_entry->st_type = st_type;
4144 if (sym_name == NULL)
4145 sym_name = "unnamed";
4146 len = sizeof (STUB_ENTRY_NAME) + strlen (sym_name);
4147 stub_entry->output_name = bfd_alloc (htab->stub_bfd, len);
4148 if (stub_entry->output_name == NULL)
4151 goto error_ret_free_internal;
4154 snprintf (stub_entry->output_name, len, STUB_ENTRY_NAME,
4157 stub_changed = TRUE;
4160 /* We're done with the internal relocs, free them. */
4161 if (elf_section_data (section)->relocs == NULL)
4162 free (internal_relocs);
4169 _bfd_aarch64_resize_stubs (htab);
4171 /* Ask the linker to do its stuff. */
4172 (*htab->layout_sections_again) ();
4173 stub_changed = FALSE;
4178 error_ret_free_local:
4182 /* Build all the stubs associated with the current output file. The
4183 stubs are kept in a hash table attached to the main linker hash
4184 table. We also set up the .plt entries for statically linked PIC
4185 functions here. This function is called via aarch64_elf_finish in the
4189 elfNN_aarch64_build_stubs (struct bfd_link_info *info)
4192 struct bfd_hash_table *table;
4193 struct elf_aarch64_link_hash_table *htab;
4195 htab = elf_aarch64_hash_table (info);
4197 for (stub_sec = htab->stub_bfd->sections;
4198 stub_sec != NULL; stub_sec = stub_sec->next)
4202 /* Ignore non-stub sections. */
4203 if (!strstr (stub_sec->name, STUB_SUFFIX))
4206 /* Allocate memory to hold the linker stubs. */
4207 size = stub_sec->size;
4208 stub_sec->contents = bfd_zalloc (htab->stub_bfd, size);
4209 if (stub_sec->contents == NULL && size != 0)
4213 bfd_putl32 (0x14000000 | (size >> 2), stub_sec->contents);
4214 stub_sec->size += 4;
4217 /* Build the stubs as directed by the stub hash table. */
4218 table = &htab->stub_hash_table;
4219 bfd_hash_traverse (table, aarch64_build_one_stub, info);
4225 /* Add an entry to the code/data map for section SEC. */
4228 elfNN_aarch64_section_map_add (asection *sec, char type, bfd_vma vma)
4230 struct _aarch64_elf_section_data *sec_data =
4231 elf_aarch64_section_data (sec);
4232 unsigned int newidx;
4234 if (sec_data->map == NULL)
4236 sec_data->map = bfd_malloc (sizeof (elf_aarch64_section_map));
4237 sec_data->mapcount = 0;
4238 sec_data->mapsize = 1;
4241 newidx = sec_data->mapcount++;
4243 if (sec_data->mapcount > sec_data->mapsize)
4245 sec_data->mapsize *= 2;
4246 sec_data->map = bfd_realloc_or_free
4247 (sec_data->map, sec_data->mapsize * sizeof (elf_aarch64_section_map));
4252 sec_data->map[newidx].vma = vma;
4253 sec_data->map[newidx].type = type;
4258 /* Initialise maps of insn/data for input BFDs. */
4260 bfd_elfNN_aarch64_init_maps (bfd *abfd)
4262 Elf_Internal_Sym *isymbuf;
4263 Elf_Internal_Shdr *hdr;
4264 unsigned int i, localsyms;
4266 /* Make sure that we are dealing with an AArch64 elf binary. */
4267 if (!is_aarch64_elf (abfd))
4270 if ((abfd->flags & DYNAMIC) != 0)
4273 hdr = &elf_symtab_hdr (abfd);
4274 localsyms = hdr->sh_info;
4276 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4277 should contain the number of local symbols, which should come before any
4278 global symbols. Mapping symbols are always local. */
4279 isymbuf = bfd_elf_get_elf_syms (abfd, hdr, localsyms, 0, NULL, NULL, NULL);
4281 /* No internal symbols read? Skip this BFD. */
4282 if (isymbuf == NULL)
4285 for (i = 0; i < localsyms; i++)
4287 Elf_Internal_Sym *isym = &isymbuf[i];
4288 asection *sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4291 if (sec != NULL && ELF_ST_BIND (isym->st_info) == STB_LOCAL)
4293 name = bfd_elf_string_from_elf_section (abfd,
4297 if (bfd_is_aarch64_special_symbol_name
4298 (name, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP))
4299 elfNN_aarch64_section_map_add (sec, name[1], isym->st_value);
4304 /* Set option values needed during linking. */
4306 bfd_elfNN_aarch64_set_options (struct bfd *output_bfd,
4307 struct bfd_link_info *link_info,
4309 int no_wchar_warn, int pic_veneer,
4310 int fix_erratum_835769,
4311 int fix_erratum_843419)
4313 struct elf_aarch64_link_hash_table *globals;
4315 globals = elf_aarch64_hash_table (link_info);
4316 globals->pic_veneer = pic_veneer;
4317 globals->fix_erratum_835769 = fix_erratum_835769;
4318 globals->fix_erratum_843419 = fix_erratum_843419;
4319 globals->fix_erratum_843419_adr = TRUE;
4321 BFD_ASSERT (is_aarch64_elf (output_bfd));
4322 elf_aarch64_tdata (output_bfd)->no_enum_size_warning = no_enum_warn;
4323 elf_aarch64_tdata (output_bfd)->no_wchar_size_warning = no_wchar_warn;
4327 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry *h,
4328 struct elf_aarch64_link_hash_table
4329 *globals, struct bfd_link_info *info,
4330 bfd_vma value, bfd *output_bfd,
4331 bfd_boolean *unresolved_reloc_p)
4333 bfd_vma off = (bfd_vma) - 1;
4334 asection *basegot = globals->root.sgot;
4335 bfd_boolean dyn = globals->root.dynamic_sections_created;
4339 BFD_ASSERT (basegot != NULL);
4340 off = h->got.offset;
4341 BFD_ASSERT (off != (bfd_vma) - 1);
4342 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, bfd_link_pic (info), h)
4343 || (bfd_link_pic (info)
4344 && SYMBOL_REFERENCES_LOCAL (info, h))
4345 || (ELF_ST_VISIBILITY (h->other)
4346 && h->root.type == bfd_link_hash_undefweak))
4348 /* This is actually a static link, or it is a -Bsymbolic link
4349 and the symbol is defined locally. We must initialize this
4350 entry in the global offset table. Since the offset must
4351 always be a multiple of 8 (4 in the case of ILP32), we use
4352 the least significant bit to record whether we have
4353 initialized it already.
4354 When doing a dynamic link, we create a .rel(a).got relocation
4355 entry to initialize the value. This is done in the
4356 finish_dynamic_symbol routine. */
4361 bfd_put_NN (output_bfd, value, basegot->contents + off);
4366 *unresolved_reloc_p = FALSE;
4368 off = off + basegot->output_section->vma + basegot->output_offset;
4374 /* Change R_TYPE to a more efficient access model where possible,
4375 return the new reloc type. */
4377 static bfd_reloc_code_real_type
4378 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type,
4379 struct elf_link_hash_entry *h)
4381 bfd_boolean is_local = h == NULL;
4385 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4386 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4388 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4389 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21);
4391 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4393 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4396 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4398 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4399 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4401 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
4402 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4404 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4405 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC);
4407 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4408 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 : r_type;
4410 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
4411 return is_local ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC : r_type;
4413 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4416 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4418 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
4419 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19);
4421 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4422 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4423 /* Instructions with these relocations will become NOPs. */
4424 return BFD_RELOC_AARCH64_NONE;
4426 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
4427 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
4428 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
4429 return is_local ? BFD_RELOC_AARCH64_NONE : r_type;
4439 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type)
4443 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4444 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4445 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4446 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4447 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
4448 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4449 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
4450 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
4453 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
4454 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
4455 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
4456 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
4457 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
4458 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
4461 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
4462 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
4463 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
4464 case BFD_RELOC_AARCH64_TLSDESC_CALL:
4465 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
4466 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
4467 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
4468 return GOT_TLSDESC_GD;
4470 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
4471 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
4472 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
4473 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
4483 aarch64_can_relax_tls (bfd *input_bfd,
4484 struct bfd_link_info *info,
4485 bfd_reloc_code_real_type r_type,
4486 struct elf_link_hash_entry *h,
4487 unsigned long r_symndx)
4489 unsigned int symbol_got_type;
4490 unsigned int reloc_got_type;
4492 if (! IS_AARCH64_TLS_RELAX_RELOC (r_type))
4495 symbol_got_type = elfNN_aarch64_symbol_got_type (h, input_bfd, r_symndx);
4496 reloc_got_type = aarch64_reloc_got_type (r_type);
4498 if (symbol_got_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (reloc_got_type))
4501 if (bfd_link_pic (info))
4504 if (h && h->root.type == bfd_link_hash_undefweak)
4510 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
4513 static bfd_reloc_code_real_type
4514 aarch64_tls_transition (bfd *input_bfd,
4515 struct bfd_link_info *info,
4516 unsigned int r_type,
4517 struct elf_link_hash_entry *h,
4518 unsigned long r_symndx)
4520 bfd_reloc_code_real_type bfd_r_type
4521 = elfNN_aarch64_bfd_reloc_from_type (r_type);
4523 if (! aarch64_can_relax_tls (input_bfd, info, bfd_r_type, h, r_symndx))
4526 return aarch64_tls_transition_without_check (bfd_r_type, h);
4529 /* Return the base VMA address which should be subtracted from real addresses
4530 when resolving R_AARCH64_TLS_DTPREL relocation. */
4533 dtpoff_base (struct bfd_link_info *info)
4535 /* If tls_sec is NULL, we should have signalled an error already. */
4536 BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
4537 return elf_hash_table (info)->tls_sec->vma;
4540 /* Return the base VMA address which should be subtracted from real addresses
4541 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
4544 tpoff_base (struct bfd_link_info *info)
4546 struct elf_link_hash_table *htab = elf_hash_table (info);
4548 /* If tls_sec is NULL, we should have signalled an error already. */
4549 BFD_ASSERT (htab->tls_sec != NULL);
4551 bfd_vma base = align_power ((bfd_vma) TCB_SIZE,
4552 htab->tls_sec->alignment_power);
4553 return htab->tls_sec->vma - base;
4557 symbol_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
4558 unsigned long r_symndx)
4560 /* Calculate the address of the GOT entry for symbol
4561 referred to in h. */
4563 return &h->got.offset;
4567 struct elf_aarch64_local_symbol *l;
4569 l = elf_aarch64_locals (input_bfd);
4570 return &l[r_symndx].got_offset;
4575 symbol_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
4576 unsigned long r_symndx)
4579 p = symbol_got_offset_ref (input_bfd, h, r_symndx);
4584 symbol_got_offset_mark_p (bfd *input_bfd, struct elf_link_hash_entry *h,
4585 unsigned long r_symndx)
4588 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
4593 symbol_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
4594 unsigned long r_symndx)
4597 value = * symbol_got_offset_ref (input_bfd, h, r_symndx);
4603 symbol_tlsdesc_got_offset_ref (bfd *input_bfd, struct elf_link_hash_entry *h,
4604 unsigned long r_symndx)
4606 /* Calculate the address of the GOT entry for symbol
4607 referred to in h. */
4610 struct elf_aarch64_link_hash_entry *eh;
4611 eh = (struct elf_aarch64_link_hash_entry *) h;
4612 return &eh->tlsdesc_got_jump_table_offset;
4617 struct elf_aarch64_local_symbol *l;
4619 l = elf_aarch64_locals (input_bfd);
4620 return &l[r_symndx].tlsdesc_got_jump_table_offset;
4625 symbol_tlsdesc_got_offset_mark (bfd *input_bfd, struct elf_link_hash_entry *h,
4626 unsigned long r_symndx)
4629 p = symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4634 symbol_tlsdesc_got_offset_mark_p (bfd *input_bfd,
4635 struct elf_link_hash_entry *h,
4636 unsigned long r_symndx)
4639 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4644 symbol_tlsdesc_got_offset (bfd *input_bfd, struct elf_link_hash_entry *h,
4645 unsigned long r_symndx)
4648 value = * symbol_tlsdesc_got_offset_ref (input_bfd, h, r_symndx);
4653 /* Data for make_branch_to_erratum_835769_stub(). */
4655 struct erratum_835769_branch_to_stub_data
4657 struct bfd_link_info *info;
4658 asection *output_section;
4662 /* Helper to insert branches to erratum 835769 stubs in the right
4663 places for a particular section. */
4666 make_branch_to_erratum_835769_stub (struct bfd_hash_entry *gen_entry,
4669 struct elf_aarch64_stub_hash_entry *stub_entry;
4670 struct erratum_835769_branch_to_stub_data *data;
4672 unsigned long branch_insn = 0;
4673 bfd_vma veneered_insn_loc, veneer_entry_loc;
4674 bfd_signed_vma branch_offset;
4675 unsigned int target;
4678 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
4679 data = (struct erratum_835769_branch_to_stub_data *) in_arg;
4681 if (stub_entry->target_section != data->output_section
4682 || stub_entry->stub_type != aarch64_stub_erratum_835769_veneer)
4685 contents = data->contents;
4686 veneered_insn_loc = stub_entry->target_section->output_section->vma
4687 + stub_entry->target_section->output_offset
4688 + stub_entry->target_value;
4689 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4690 + stub_entry->stub_sec->output_offset
4691 + stub_entry->stub_offset;
4692 branch_offset = veneer_entry_loc - veneered_insn_loc;
4694 abfd = stub_entry->target_section->owner;
4695 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4696 (*_bfd_error_handler)
4697 (_("%B: error: Erratum 835769 stub out "
4698 "of range (input file too large)"), abfd);
4700 target = stub_entry->target_value;
4701 branch_insn = 0x14000000;
4702 branch_offset >>= 2;
4703 branch_offset &= 0x3ffffff;
4704 branch_insn |= branch_offset;
4705 bfd_putl32 (branch_insn, &contents[target]);
4712 _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry *gen_entry,
4715 struct elf_aarch64_stub_hash_entry *stub_entry
4716 = (struct elf_aarch64_stub_hash_entry *) gen_entry;
4717 struct erratum_835769_branch_to_stub_data *data
4718 = (struct erratum_835769_branch_to_stub_data *) in_arg;
4719 struct bfd_link_info *info;
4720 struct elf_aarch64_link_hash_table *htab;
4728 contents = data->contents;
4729 section = data->output_section;
4731 htab = elf_aarch64_hash_table (info);
4733 if (stub_entry->target_section != section
4734 || stub_entry->stub_type != aarch64_stub_erratum_843419_veneer)
4737 insn = bfd_getl32 (contents + stub_entry->target_value);
4739 stub_entry->stub_sec->contents + stub_entry->stub_offset);
4741 place = (section->output_section->vma + section->output_offset
4742 + stub_entry->adrp_offset);
4743 insn = bfd_getl32 (contents + stub_entry->adrp_offset);
4745 if ((insn & AARCH64_ADRP_OP_MASK) != AARCH64_ADRP_OP)
4748 bfd_signed_vma imm =
4749 (_bfd_aarch64_sign_extend
4750 ((bfd_vma) _bfd_aarch64_decode_adrp_imm (insn) << 12, 33)
4753 if (htab->fix_erratum_843419_adr
4754 && (imm >= AARCH64_MIN_ADRP_IMM && imm <= AARCH64_MAX_ADRP_IMM))
4756 insn = (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP, imm)
4757 | AARCH64_RT (insn));
4758 bfd_putl32 (insn, contents + stub_entry->adrp_offset);
4762 bfd_vma veneered_insn_loc;
4763 bfd_vma veneer_entry_loc;
4764 bfd_signed_vma branch_offset;
4765 uint32_t branch_insn;
4767 veneered_insn_loc = stub_entry->target_section->output_section->vma
4768 + stub_entry->target_section->output_offset
4769 + stub_entry->target_value;
4770 veneer_entry_loc = stub_entry->stub_sec->output_section->vma
4771 + stub_entry->stub_sec->output_offset
4772 + stub_entry->stub_offset;
4773 branch_offset = veneer_entry_loc - veneered_insn_loc;
4775 abfd = stub_entry->target_section->owner;
4776 if (!aarch64_valid_branch_p (veneer_entry_loc, veneered_insn_loc))
4777 (*_bfd_error_handler)
4778 (_("%B: error: Erratum 843419 stub out "
4779 "of range (input file too large)"), abfd);
4781 branch_insn = 0x14000000;
4782 branch_offset >>= 2;
4783 branch_offset &= 0x3ffffff;
4784 branch_insn |= branch_offset;
4785 bfd_putl32 (branch_insn, contents + stub_entry->target_value);
4792 elfNN_aarch64_write_section (bfd *output_bfd ATTRIBUTE_UNUSED,
4793 struct bfd_link_info *link_info,
4798 struct elf_aarch64_link_hash_table *globals =
4799 elf_aarch64_hash_table (link_info);
4801 if (globals == NULL)
4804 /* Fix code to point to erratum 835769 stubs. */
4805 if (globals->fix_erratum_835769)
4807 struct erratum_835769_branch_to_stub_data data;
4809 data.info = link_info;
4810 data.output_section = sec;
4811 data.contents = contents;
4812 bfd_hash_traverse (&globals->stub_hash_table,
4813 make_branch_to_erratum_835769_stub, &data);
4816 if (globals->fix_erratum_843419)
4818 struct erratum_835769_branch_to_stub_data data;
4820 data.info = link_info;
4821 data.output_section = sec;
4822 data.contents = contents;
4823 bfd_hash_traverse (&globals->stub_hash_table,
4824 _bfd_aarch64_erratum_843419_branch_to_stub, &data);
4830 /* Perform a relocation as part of a final link. */
4831 static bfd_reloc_status_type
4832 elfNN_aarch64_final_link_relocate (reloc_howto_type *howto,
4835 asection *input_section,
4837 Elf_Internal_Rela *rel,
4839 struct bfd_link_info *info,
4841 struct elf_link_hash_entry *h,
4842 bfd_boolean *unresolved_reloc_p,
4843 bfd_boolean save_addend,
4844 bfd_vma *saved_addend,
4845 Elf_Internal_Sym *sym)
4847 Elf_Internal_Shdr *symtab_hdr;
4848 unsigned int r_type = howto->type;
4849 bfd_reloc_code_real_type bfd_r_type
4850 = elfNN_aarch64_bfd_reloc_from_howto (howto);
4851 bfd_reloc_code_real_type new_bfd_r_type;
4852 unsigned long r_symndx;
4853 bfd_byte *hit_data = contents + rel->r_offset;
4855 bfd_signed_vma signed_addend;
4856 struct elf_aarch64_link_hash_table *globals;
4857 bfd_boolean weak_undef_p;
4860 globals = elf_aarch64_hash_table (info);
4862 symtab_hdr = &elf_symtab_hdr (input_bfd);
4864 BFD_ASSERT (is_aarch64_elf (input_bfd));
4866 r_symndx = ELFNN_R_SYM (rel->r_info);
4868 /* It is possible to have linker relaxations on some TLS access
4869 models. Update our information here. */
4870 new_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type, h, r_symndx);
4871 if (new_bfd_r_type != bfd_r_type)
4873 bfd_r_type = new_bfd_r_type;
4874 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
4875 BFD_ASSERT (howto != NULL);
4876 r_type = howto->type;
4879 place = input_section->output_section->vma
4880 + input_section->output_offset + rel->r_offset;
4882 /* Get addend, accumulating the addend for consecutive relocs
4883 which refer to the same offset. */
4884 signed_addend = saved_addend ? *saved_addend : 0;
4885 signed_addend += rel->r_addend;
4887 weak_undef_p = (h ? h->root.type == bfd_link_hash_undefweak
4888 : bfd_is_und_section (sym_sec));
4890 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4891 it here if it is defined in a non-shared object. */
4893 && h->type == STT_GNU_IFUNC
4900 if ((input_section->flags & SEC_ALLOC) == 0
4901 || h->plt.offset == (bfd_vma) -1)
4904 /* STT_GNU_IFUNC symbol must go through PLT. */
4905 plt = globals->root.splt ? globals->root.splt : globals->root.iplt;
4906 value = (plt->output_section->vma + plt->output_offset + h->plt.offset);
4911 if (h->root.root.string)
4912 name = h->root.root.string;
4914 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4916 (*_bfd_error_handler)
4917 (_("%B: relocation %s against STT_GNU_IFUNC "
4918 "symbol `%s' isn't handled by %s"), input_bfd,
4919 howto->name, name, __FUNCTION__);
4920 bfd_set_error (bfd_error_bad_value);
4923 case BFD_RELOC_AARCH64_NN:
4924 if (rel->r_addend != 0)
4926 if (h->root.root.string)
4927 name = h->root.root.string;
4929 name = bfd_elf_sym_name (input_bfd, symtab_hdr,
4931 (*_bfd_error_handler)
4932 (_("%B: relocation %s against STT_GNU_IFUNC "
4933 "symbol `%s' has non-zero addend: %d"),
4934 input_bfd, howto->name, name, rel->r_addend);
4935 bfd_set_error (bfd_error_bad_value);
4939 /* Generate dynamic relocation only when there is a
4940 non-GOT reference in a shared object. */
4941 if (bfd_link_pic (info) && h->non_got_ref)
4943 Elf_Internal_Rela outrel;
4946 /* Need a dynamic relocation to get the real function
4948 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
4952 if (outrel.r_offset == (bfd_vma) -1
4953 || outrel.r_offset == (bfd_vma) -2)
4956 outrel.r_offset += (input_section->output_section->vma
4957 + input_section->output_offset);
4959 if (h->dynindx == -1
4961 || bfd_link_executable (info))
4963 /* This symbol is resolved locally. */
4964 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
4965 outrel.r_addend = (h->root.u.def.value
4966 + h->root.u.def.section->output_section->vma
4967 + h->root.u.def.section->output_offset);
4971 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
4972 outrel.r_addend = 0;
4975 sreloc = globals->root.irelifunc;
4976 elf_append_rela (output_bfd, sreloc, &outrel);
4978 /* If this reloc is against an external symbol, we
4979 do not want to fiddle with the addend. Otherwise,
4980 we need to include the symbol value so that it
4981 becomes an addend for the dynamic reloc. For an
4982 internal symbol, we have updated addend. */
4983 return bfd_reloc_ok;
4986 case BFD_RELOC_AARCH64_CALL26:
4987 case BFD_RELOC_AARCH64_JUMP26:
4988 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
4991 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
4993 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
4994 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
4995 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
4996 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
4997 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
4998 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
4999 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
5000 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5001 base_got = globals->root.sgot;
5002 off = h->got.offset;
5004 if (base_got == NULL)
5007 if (off == (bfd_vma) -1)
5011 /* We can't use h->got.offset here to save state, or
5012 even just remember the offset, as finish_dynamic_symbol
5013 would use that as offset into .got. */
5015 if (globals->root.splt != NULL)
5017 plt_index = ((h->plt.offset - globals->plt_header_size) /
5018 globals->plt_entry_size);
5019 off = (plt_index + 3) * GOT_ENTRY_SIZE;
5020 base_got = globals->root.sgotplt;
5024 plt_index = h->plt.offset / globals->plt_entry_size;
5025 off = plt_index * GOT_ENTRY_SIZE;
5026 base_got = globals->root.igotplt;
5029 if (h->dynindx == -1
5033 /* This references the local definition. We must
5034 initialize this entry in the global offset table.
5035 Since the offset must always be a multiple of 8,
5036 we use the least significant bit to record
5037 whether we have initialized it already.
5039 When doing a dynamic link, we create a .rela.got
5040 relocation entry to initialize the value. This
5041 is done in the finish_dynamic_symbol routine. */
5046 bfd_put_NN (output_bfd, value,
5047 base_got->contents + off);
5048 /* Note that this is harmless as -1 | 1 still is -1. */
5052 value = (base_got->output_section->vma
5053 + base_got->output_offset + off);
5056 value = aarch64_calculate_got_entry_vma (h, globals, info,
5058 unresolved_reloc_p);
5062 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
5063 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
5064 addend = (globals->root.sgot->output_section->vma
5065 + globals->root.sgot->output_offset);
5067 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
5068 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
5069 value = (value - globals->root.sgot->output_section->vma
5070 - globals->root.sgot->output_offset);
5075 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5076 addend, weak_undef_p);
5077 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type, howto, value);
5078 case BFD_RELOC_AARCH64_ADD_LO12:
5079 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5086 case BFD_RELOC_AARCH64_NONE:
5087 case BFD_RELOC_AARCH64_TLSDESC_CALL:
5088 *unresolved_reloc_p = FALSE;
5089 return bfd_reloc_ok;
5091 case BFD_RELOC_AARCH64_NN:
5093 /* When generating a shared object or relocatable executable, these
5094 relocations are copied into the output file to be resolved at
5096 if (((bfd_link_pic (info) == TRUE)
5097 || globals->root.is_relocatable_executable)
5098 && (input_section->flags & SEC_ALLOC)
5100 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5101 || h->root.type != bfd_link_hash_undefweak))
5103 Elf_Internal_Rela outrel;
5105 bfd_boolean skip, relocate;
5108 *unresolved_reloc_p = FALSE;
5113 outrel.r_addend = signed_addend;
5115 _bfd_elf_section_offset (output_bfd, info, input_section,
5117 if (outrel.r_offset == (bfd_vma) - 1)
5119 else if (outrel.r_offset == (bfd_vma) - 2)
5125 outrel.r_offset += (input_section->output_section->vma
5126 + input_section->output_offset);
5129 memset (&outrel, 0, sizeof outrel);
5132 && (!bfd_link_pic (info)
5133 || !SYMBOLIC_BIND (info, h)
5134 || !h->def_regular))
5135 outrel.r_info = ELFNN_R_INFO (h->dynindx, r_type);
5140 /* On SVR4-ish systems, the dynamic loader cannot
5141 relocate the text and data segments independently,
5142 so the symbol does not matter. */
5144 outrel.r_info = ELFNN_R_INFO (symbol, AARCH64_R (RELATIVE));
5145 outrel.r_addend += value;
5148 sreloc = elf_section_data (input_section)->sreloc;
5149 if (sreloc == NULL || sreloc->contents == NULL)
5150 return bfd_reloc_notsupported;
5152 loc = sreloc->contents + sreloc->reloc_count++ * RELOC_SIZE (globals);
5153 bfd_elfNN_swap_reloca_out (output_bfd, &outrel, loc);
5155 if (sreloc->reloc_count * RELOC_SIZE (globals) > sreloc->size)
5157 /* Sanity to check that we have previously allocated
5158 sufficient space in the relocation section for the
5159 number of relocations we actually want to emit. */
5163 /* If this reloc is against an external symbol, we do not want to
5164 fiddle with the addend. Otherwise, we need to include the symbol
5165 value so that it becomes an addend for the dynamic reloc. */
5167 return bfd_reloc_ok;
5169 return _bfd_final_link_relocate (howto, input_bfd, input_section,
5170 contents, rel->r_offset, value,
5174 value += signed_addend;
5177 case BFD_RELOC_AARCH64_CALL26:
5178 case BFD_RELOC_AARCH64_JUMP26:
5180 asection *splt = globals->root.splt;
5181 bfd_boolean via_plt_p =
5182 splt != NULL && h != NULL && h->plt.offset != (bfd_vma) - 1;
5184 /* A call to an undefined weak symbol is converted to a jump to
5185 the next instruction unless a PLT entry will be created.
5186 The jump to the next instruction is optimized as a NOP.
5187 Do the same for local undefined symbols. */
5188 if (weak_undef_p && ! via_plt_p)
5190 bfd_putl32 (INSN_NOP, hit_data);
5191 return bfd_reloc_ok;
5194 /* If the call goes through a PLT entry, make sure to
5195 check distance to the right destination address. */
5197 value = (splt->output_section->vma
5198 + splt->output_offset + h->plt.offset);
5200 /* Check if a stub has to be inserted because the destination
5202 struct elf_aarch64_stub_hash_entry *stub_entry = NULL;
5203 if (! aarch64_valid_branch_p (value, place))
5204 /* The target is out of reach, so redirect the branch to
5205 the local stub for this function. */
5206 stub_entry = elfNN_aarch64_get_stub_entry (input_section, sym_sec, h,
5208 if (stub_entry != NULL)
5209 value = (stub_entry->stub_offset
5210 + stub_entry->stub_sec->output_offset
5211 + stub_entry->stub_sec->output_section->vma);
5213 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5214 signed_addend, weak_undef_p);
5215 *unresolved_reloc_p = FALSE;
5218 case BFD_RELOC_AARCH64_16_PCREL:
5219 case BFD_RELOC_AARCH64_32_PCREL:
5220 case BFD_RELOC_AARCH64_64_PCREL:
5221 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
5222 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
5223 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
5224 case BFD_RELOC_AARCH64_LD_LO19_PCREL:
5225 if (bfd_link_pic (info)
5226 && (input_section->flags & SEC_ALLOC) != 0
5227 && (input_section->flags & SEC_READONLY) != 0
5231 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
5233 (*_bfd_error_handler)
5234 (_("%B: relocation %s against external symbol `%s' can not be used"
5235 " when making a shared object; recompile with -fPIC"),
5236 input_bfd, elfNN_aarch64_howto_table[howto_index].name,
5237 h->root.root.string);
5238 bfd_set_error (bfd_error_bad_value);
5242 case BFD_RELOC_AARCH64_16:
5244 case BFD_RELOC_AARCH64_32:
5246 case BFD_RELOC_AARCH64_ADD_LO12:
5247 case BFD_RELOC_AARCH64_BRANCH19:
5248 case BFD_RELOC_AARCH64_LDST128_LO12:
5249 case BFD_RELOC_AARCH64_LDST16_LO12:
5250 case BFD_RELOC_AARCH64_LDST32_LO12:
5251 case BFD_RELOC_AARCH64_LDST64_LO12:
5252 case BFD_RELOC_AARCH64_LDST8_LO12:
5253 case BFD_RELOC_AARCH64_MOVW_G0:
5254 case BFD_RELOC_AARCH64_MOVW_G0_NC:
5255 case BFD_RELOC_AARCH64_MOVW_G0_S:
5256 case BFD_RELOC_AARCH64_MOVW_G1:
5257 case BFD_RELOC_AARCH64_MOVW_G1_NC:
5258 case BFD_RELOC_AARCH64_MOVW_G1_S:
5259 case BFD_RELOC_AARCH64_MOVW_G2:
5260 case BFD_RELOC_AARCH64_MOVW_G2_NC:
5261 case BFD_RELOC_AARCH64_MOVW_G2_S:
5262 case BFD_RELOC_AARCH64_MOVW_G3:
5263 case BFD_RELOC_AARCH64_TSTBR14:
5264 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5265 signed_addend, weak_undef_p);
5268 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
5269 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
5270 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
5271 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
5272 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
5273 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
5274 if (globals->root.sgot == NULL)
5275 BFD_ASSERT (h != NULL);
5280 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
5282 unresolved_reloc_p);
5283 if (bfd_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5284 || bfd_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
5285 addend = (globals->root.sgot->output_section->vma
5286 + globals->root.sgot->output_offset);
5287 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5288 addend, weak_undef_p);
5293 struct elf_aarch64_local_symbol *locals
5294 = elf_aarch64_locals (input_bfd);
5298 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
5299 (*_bfd_error_handler)
5300 (_("%B: Local symbol descriptor table be NULL when applying "
5301 "relocation %s against local symbol"),
5302 input_bfd, elfNN_aarch64_howto_table[howto_index].name);
5306 off = symbol_got_offset (input_bfd, h, r_symndx);
5307 base_got = globals->root.sgot;
5308 bfd_vma got_entry_addr = (base_got->output_section->vma
5309 + base_got->output_offset + off);
5311 if (!symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5313 bfd_put_64 (output_bfd, value, base_got->contents + off);
5315 if (bfd_link_pic (info))
5318 Elf_Internal_Rela outrel;
5320 /* For local symbol, we have done absolute relocation in static
5321 linking stageh. While for share library, we need to update
5322 the content of GOT entry according to the share objects
5323 loading base address. So we need to generate a
5324 R_AARCH64_RELATIVE reloc for dynamic linker. */
5325 s = globals->root.srelgot;
5329 outrel.r_offset = got_entry_addr;
5330 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
5331 outrel.r_addend = value;
5332 elf_append_rela (output_bfd, s, &outrel);
5335 symbol_got_offset_mark (input_bfd, h, r_symndx);
5338 /* Update the relocation value to GOT entry addr as we have transformed
5339 the direct data access into indirect data access through GOT. */
5340 value = got_entry_addr;
5342 if (bfd_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5343 || bfd_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
5344 addend = base_got->output_section->vma + base_got->output_offset;
5346 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5347 addend, weak_undef_p);
5352 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
5353 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
5355 value = aarch64_calculate_got_entry_vma (h, globals, info, value,
5357 unresolved_reloc_p);
5360 struct elf_aarch64_local_symbol *locals
5361 = elf_aarch64_locals (input_bfd);
5365 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
5366 (*_bfd_error_handler)
5367 (_("%B: Local symbol descriptor table be NULL when applying "
5368 "relocation %s against local symbol"),
5369 input_bfd, elfNN_aarch64_howto_table[howto_index].name);
5373 off = symbol_got_offset (input_bfd, h, r_symndx);
5374 base_got = globals->root.sgot;
5375 if (base_got == NULL)
5378 bfd_vma got_entry_addr = (base_got->output_section->vma
5379 + base_got->output_offset + off);
5381 if (!symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5383 bfd_put_64 (output_bfd, value, base_got->contents + off);
5385 if (bfd_link_pic (info))
5388 Elf_Internal_Rela outrel;
5390 /* For local symbol, we have done absolute relocation in static
5391 linking stage. While for share library, we need to update
5392 the content of GOT entry according to the share objects
5393 loading base address. So we need to generate a
5394 R_AARCH64_RELATIVE reloc for dynamic linker. */
5395 s = globals->root.srelgot;
5399 outrel.r_offset = got_entry_addr;
5400 outrel.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
5401 outrel.r_addend = value;
5402 elf_append_rela (output_bfd, s, &outrel);
5405 symbol_got_offset_mark (input_bfd, h, r_symndx);
5409 /* Update the relocation value to GOT entry addr as we have transformed
5410 the direct data access into indirect data access through GOT. */
5411 value = symbol_got_offset (input_bfd, h, r_symndx);
5412 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5414 *unresolved_reloc_p = FALSE;
5417 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5418 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5419 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5420 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5421 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
5422 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
5423 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5424 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
5425 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
5426 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
5427 if (globals->root.sgot == NULL)
5428 return bfd_reloc_notsupported;
5430 value = (symbol_got_offset (input_bfd, h, r_symndx)
5431 + globals->root.sgot->output_section->vma
5432 + globals->root.sgot->output_offset);
5434 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5436 *unresolved_reloc_p = FALSE;
5439 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12:
5440 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12:
5441 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC:
5442 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12:
5443 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC:
5444 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12:
5445 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC:
5446 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12:
5447 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC:
5448 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12:
5449 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC:
5450 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0:
5451 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC:
5452 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1:
5453 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC:
5454 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2:
5455 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5456 signed_addend - dtpoff_base (info),
5460 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12:
5461 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12:
5462 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC:
5463 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0:
5464 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC:
5465 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1:
5466 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC:
5467 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2:
5468 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5469 signed_addend - tpoff_base (info),
5471 *unresolved_reloc_p = FALSE;
5474 case BFD_RELOC_AARCH64_TLSDESC_ADD:
5475 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5476 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5477 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5478 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
5479 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
5480 case BFD_RELOC_AARCH64_TLSDESC_LDR:
5481 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5482 if (globals->root.sgot == NULL)
5483 return bfd_reloc_notsupported;
5484 value = (symbol_tlsdesc_got_offset (input_bfd, h, r_symndx)
5485 + globals->root.sgotplt->output_section->vma
5486 + globals->root.sgotplt->output_offset
5487 + globals->sgotplt_jump_table_size);
5489 value = _bfd_aarch64_elf_resolve_relocation (bfd_r_type, place, value,
5491 *unresolved_reloc_p = FALSE;
5495 return bfd_reloc_notsupported;
5499 *saved_addend = value;
5501 /* Only apply the final relocation in a sequence. */
5503 return bfd_reloc_continue;
5505 return _bfd_aarch64_elf_put_addend (input_bfd, hit_data, bfd_r_type,
5509 /* Handle TLS relaxations. Relaxing is possible for symbols that use
5510 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
5513 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
5514 is to then call final_link_relocate. Return other values in the
5517 static bfd_reloc_status_type
5518 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table *globals,
5519 bfd *input_bfd, bfd_byte *contents,
5520 Elf_Internal_Rela *rel, struct elf_link_hash_entry *h)
5522 bfd_boolean is_local = h == NULL;
5523 unsigned int r_type = ELFNN_R_TYPE (rel->r_info);
5526 BFD_ASSERT (globals && input_bfd && contents && rel);
5528 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
5530 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
5531 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5534 /* GD->LE relaxation:
5535 adrp x0, :tlsgd:var => movz x0, :tprel_g1:var
5537 adrp x0, :tlsdesc:var => movz x0, :tprel_g1:var
5539 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
5540 return bfd_reloc_continue;
5544 /* GD->IE relaxation:
5545 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
5547 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
5549 return bfd_reloc_continue;
5552 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
5556 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
5559 /* Tiny TLSDESC->LE relaxation:
5560 ldr x1, :tlsdesc:var => movz x0, #:tprel_g1:var
5561 adr x0, :tlsdesc:var => movk x0, #:tprel_g0_nc:var
5565 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
5566 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
5568 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5569 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC));
5570 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5572 bfd_putl32 (0xd2a00000, contents + rel->r_offset);
5573 bfd_putl32 (0xf2800000, contents + rel->r_offset + 4);
5574 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
5575 return bfd_reloc_continue;
5579 /* Tiny TLSDESC->IE relaxation:
5580 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
5581 adr x0, :tlsdesc:var => nop
5585 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (TLSDESC_ADR_PREL21));
5586 BFD_ASSERT (ELFNN_R_TYPE (rel[2].r_info) == AARCH64_R (TLSDESC_CALL));
5588 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5589 rel[2].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5591 bfd_putl32 (0x58000000, contents + rel->r_offset);
5592 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 4);
5593 bfd_putl32 (INSN_NOP, contents + rel->r_offset + 8);
5594 return bfd_reloc_continue;
5597 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5600 /* Tiny GD->LE relaxation:
5601 adr x0, :tlsgd:var => mrs x1, tpidr_el0
5602 bl __tls_get_addr => add x0, x1, #:tprel_hi12:x, lsl #12
5603 nop => add x0, x0, #:tprel_lo12_nc:x
5606 /* First kill the tls_get_addr reloc on the bl instruction. */
5607 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5609 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 0);
5610 bfd_putl32 (0x91400020, contents + rel->r_offset + 4);
5611 bfd_putl32 (0x91000000, contents + rel->r_offset + 8);
5613 rel[1].r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5614 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC));
5615 rel[1].r_offset = rel->r_offset + 8;
5617 /* Move the current relocation to the second instruction in
5620 rel->r_info = ELFNN_R_INFO (ELFNN_R_SYM (rel->r_info),
5621 AARCH64_R (TLSLE_ADD_TPREL_HI12));
5622 return bfd_reloc_continue;
5626 /* Tiny GD->IE relaxation:
5627 adr x0, :tlsgd:var => ldr x0, :gottprel:var
5628 bl __tls_get_addr => mrs x1, tpidr_el0
5629 nop => add x0, x0, x1
5632 /* First kill the tls_get_addr reloc on the bl instruction. */
5633 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5634 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5636 bfd_putl32 (0x58000000, contents + rel->r_offset);
5637 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
5638 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
5639 return bfd_reloc_continue;
5642 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
5643 return bfd_reloc_continue;
5645 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
5648 /* GD->LE relaxation:
5649 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
5651 bfd_putl32 (0xf2800000, contents + rel->r_offset);
5652 return bfd_reloc_continue;
5656 /* GD->IE relaxation:
5657 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr x0, [x0, #:gottprel_lo12:var]
5659 insn = bfd_getl32 (contents + rel->r_offset);
5661 bfd_putl32 (insn, contents + rel->r_offset);
5662 return bfd_reloc_continue;
5665 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5668 /* GD->LE relaxation
5669 add x0, #:tlsgd_lo12:var => movk x0, :tprel_g0_nc:var
5670 bl __tls_get_addr => mrs x1, tpidr_el0
5671 nop => add x0, x1, x0
5674 /* First kill the tls_get_addr reloc on the bl instruction. */
5675 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5676 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5678 bfd_putl32 (0xf2800000, contents + rel->r_offset);
5679 bfd_putl32 (0xd53bd041, contents + rel->r_offset + 4);
5680 bfd_putl32 (0x8b000020, contents + rel->r_offset + 8);
5681 return bfd_reloc_continue;
5685 /* GD->IE relaxation
5686 ADD x0, #:tlsgd_lo12:var => ldr x0, [x0, #:gottprel_lo12:var]
5687 BL __tls_get_addr => mrs x1, tpidr_el0
5689 NOP => add x0, x1, x0
5692 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
5694 /* Remove the relocation on the BL instruction. */
5695 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5697 bfd_putl32 (0xf9400000, contents + rel->r_offset);
5699 /* We choose to fixup the BL and NOP instructions using the
5700 offset from the second relocation to allow flexibility in
5701 scheduling instructions between the ADD and BL. */
5702 bfd_putl32 (0xd53bd041, contents + rel[1].r_offset);
5703 bfd_putl32 (0x8b000020, contents + rel[1].r_offset + 4);
5704 return bfd_reloc_continue;
5707 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
5708 case BFD_RELOC_AARCH64_TLSDESC_CALL:
5709 /* GD->IE/LE relaxation:
5710 add x0, x0, #:tlsdesc_lo12:var => nop
5713 bfd_putl32 (INSN_NOP, contents + rel->r_offset);
5714 return bfd_reloc_ok;
5716 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
5717 /* IE->LE relaxation:
5718 adrp xd, :gottprel:var => movz xd, :tprel_g1:var
5722 insn = bfd_getl32 (contents + rel->r_offset);
5723 bfd_putl32 (0xd2a00000 | (insn & 0x1f), contents + rel->r_offset);
5725 return bfd_reloc_continue;
5727 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
5728 /* IE->LE relaxation:
5729 ldr xd, [xm, #:gottprel_lo12:var] => movk xd, :tprel_g0_nc:var
5733 insn = bfd_getl32 (contents + rel->r_offset);
5734 bfd_putl32 (0xf2800000 | (insn & 0x1f), contents + rel->r_offset);
5736 return bfd_reloc_continue;
5738 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
5739 /* LD->LE relaxation (tiny):
5740 adr x0, :tlsldm:x => mrs x0, tpidr_el0
5741 bl __tls_get_addr => add x0, x0, TCB_SIZE
5745 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5746 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
5747 /* No need of CALL26 relocation for tls_get_addr. */
5748 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5749 bfd_putl32 (0xd53bd040, contents + rel->r_offset + 0);
5750 bfd_putl32 (0x91004000, contents + rel->r_offset + 4);
5751 return bfd_reloc_ok;
5753 return bfd_reloc_continue;
5755 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
5756 /* LD->LE relaxation (small):
5757 adrp x0, :tlsldm:x => mrs x0, tpidr_el0
5761 bfd_putl32 (0xd53bd040, contents + rel->r_offset);
5762 return bfd_reloc_ok;
5764 return bfd_reloc_continue;
5766 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
5767 /* LD->LE relaxation (small):
5768 add x0, #:tlsldm_lo12:x => add x0, x0, TCB_SIZE
5769 bl __tls_get_addr => nop
5773 BFD_ASSERT (rel->r_offset + 4 == rel[1].r_offset);
5774 BFD_ASSERT (ELFNN_R_TYPE (rel[1].r_info) == AARCH64_R (CALL26));
5775 /* No need of CALL26 relocation for tls_get_addr. */
5776 rel[1].r_info = ELFNN_R_INFO (STN_UNDEF, R_AARCH64_NONE);
5777 bfd_putl32 (0x91004000, contents + rel->r_offset + 0);
5778 bfd_putl32 (0xd503201f, contents + rel->r_offset + 4);
5779 return bfd_reloc_ok;
5781 return bfd_reloc_continue;
5784 return bfd_reloc_continue;
5787 return bfd_reloc_ok;
5790 /* Relocate an AArch64 ELF section. */
5793 elfNN_aarch64_relocate_section (bfd *output_bfd,
5794 struct bfd_link_info *info,
5796 asection *input_section,
5798 Elf_Internal_Rela *relocs,
5799 Elf_Internal_Sym *local_syms,
5800 asection **local_sections)
5802 Elf_Internal_Shdr *symtab_hdr;
5803 struct elf_link_hash_entry **sym_hashes;
5804 Elf_Internal_Rela *rel;
5805 Elf_Internal_Rela *relend;
5807 struct elf_aarch64_link_hash_table *globals;
5808 bfd_boolean save_addend = FALSE;
5811 globals = elf_aarch64_hash_table (info);
5813 symtab_hdr = &elf_symtab_hdr (input_bfd);
5814 sym_hashes = elf_sym_hashes (input_bfd);
5817 relend = relocs + input_section->reloc_count;
5818 for (; rel < relend; rel++)
5820 unsigned int r_type;
5821 bfd_reloc_code_real_type bfd_r_type;
5822 bfd_reloc_code_real_type relaxed_bfd_r_type;
5823 reloc_howto_type *howto;
5824 unsigned long r_symndx;
5825 Elf_Internal_Sym *sym;
5827 struct elf_link_hash_entry *h;
5829 bfd_reloc_status_type r;
5832 bfd_boolean unresolved_reloc = FALSE;
5833 char *error_message = NULL;
5835 r_symndx = ELFNN_R_SYM (rel->r_info);
5836 r_type = ELFNN_R_TYPE (rel->r_info);
5838 bfd_reloc.howto = elfNN_aarch64_howto_from_type (r_type);
5839 howto = bfd_reloc.howto;
5843 (*_bfd_error_handler)
5844 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
5845 input_bfd, input_section, r_type);
5848 bfd_r_type = elfNN_aarch64_bfd_reloc_from_howto (howto);
5854 if (r_symndx < symtab_hdr->sh_info)
5856 sym = local_syms + r_symndx;
5857 sym_type = ELFNN_ST_TYPE (sym->st_info);
5858 sec = local_sections[r_symndx];
5860 /* An object file might have a reference to a local
5861 undefined symbol. This is a daft object file, but we
5862 should at least do something about it. */
5863 if (r_type != R_AARCH64_NONE && r_type != R_AARCH64_NULL
5864 && bfd_is_und_section (sec)
5865 && ELF_ST_BIND (sym->st_info) != STB_WEAK)
5867 if (!info->callbacks->undefined_symbol
5868 (info, bfd_elf_string_from_elf_section
5869 (input_bfd, symtab_hdr->sh_link, sym->st_name),
5870 input_bfd, input_section, rel->r_offset, TRUE))
5874 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5876 /* Relocate against local STT_GNU_IFUNC symbol. */
5877 if (!bfd_link_relocatable (info)
5878 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
5880 h = elfNN_aarch64_get_local_sym_hash (globals, input_bfd,
5885 /* Set STT_GNU_IFUNC symbol value. */
5886 h->root.u.def.value = sym->st_value;
5887 h->root.u.def.section = sec;
5892 bfd_boolean warned, ignored;
5894 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5895 r_symndx, symtab_hdr, sym_hashes,
5897 unresolved_reloc, warned, ignored);
5902 if (sec != NULL && discarded_section (sec))
5903 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
5904 rel, 1, relend, howto, 0, contents);
5906 if (bfd_link_relocatable (info))
5910 name = h->root.root.string;
5913 name = (bfd_elf_string_from_elf_section
5914 (input_bfd, symtab_hdr->sh_link, sym->st_name));
5915 if (name == NULL || *name == '\0')
5916 name = bfd_section_name (input_bfd, sec);
5920 && r_type != R_AARCH64_NONE
5921 && r_type != R_AARCH64_NULL
5923 || h->root.type == bfd_link_hash_defined
5924 || h->root.type == bfd_link_hash_defweak)
5925 && IS_AARCH64_TLS_RELOC (bfd_r_type) != (sym_type == STT_TLS))
5927 (*_bfd_error_handler)
5928 ((sym_type == STT_TLS
5929 ? _("%B(%A+0x%lx): %s used with TLS symbol %s")
5930 : _("%B(%A+0x%lx): %s used with non-TLS symbol %s")),
5932 input_section, (long) rel->r_offset, howto->name, name);
5935 /* We relax only if we can see that there can be a valid transition
5936 from a reloc type to another.
5937 We call elfNN_aarch64_final_link_relocate unless we're completely
5938 done, i.e., the relaxation produced the final output we want. */
5940 relaxed_bfd_r_type = aarch64_tls_transition (input_bfd, info, r_type,
5942 if (relaxed_bfd_r_type != bfd_r_type)
5944 bfd_r_type = relaxed_bfd_r_type;
5945 howto = elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type);
5946 BFD_ASSERT (howto != NULL);
5947 r_type = howto->type;
5948 r = elfNN_aarch64_tls_relax (globals, input_bfd, contents, rel, h);
5949 unresolved_reloc = 0;
5952 r = bfd_reloc_continue;
5954 /* There may be multiple consecutive relocations for the
5955 same offset. In that case we are supposed to treat the
5956 output of each relocation as the addend for the next. */
5957 if (rel + 1 < relend
5958 && rel->r_offset == rel[1].r_offset
5959 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NONE
5960 && ELFNN_R_TYPE (rel[1].r_info) != R_AARCH64_NULL)
5963 save_addend = FALSE;
5965 if (r == bfd_reloc_continue)
5966 r = elfNN_aarch64_final_link_relocate (howto, input_bfd, output_bfd,
5967 input_section, contents, rel,
5968 relocation, info, sec,
5969 h, &unresolved_reloc,
5970 save_addend, &addend, sym);
5972 switch (elfNN_aarch64_bfd_reloc_from_type (r_type))
5974 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
5975 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
5976 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
5977 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
5978 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
5979 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
5980 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
5982 bfd_boolean need_relocs = FALSE;
5987 off = symbol_got_offset (input_bfd, h, r_symndx);
5988 indx = h && h->dynindx != -1 ? h->dynindx : 0;
5991 (bfd_link_pic (info) || indx != 0) &&
5993 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5994 || h->root.type != bfd_link_hash_undefweak);
5996 BFD_ASSERT (globals->root.srelgot != NULL);
6000 Elf_Internal_Rela rela;
6001 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPMOD));
6003 rela.r_offset = globals->root.sgot->output_section->vma +
6004 globals->root.sgot->output_offset + off;
6007 loc = globals->root.srelgot->contents;
6008 loc += globals->root.srelgot->reloc_count++
6009 * RELOC_SIZE (htab);
6010 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6012 bfd_reloc_code_real_type real_type =
6013 elfNN_aarch64_bfd_reloc_from_type (r_type);
6015 if (real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
6016 || real_type == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
6017 || real_type == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC)
6019 /* For local dynamic, don't generate DTPREL in any case.
6020 Initialize the DTPREL slot into zero, so we get module
6021 base address when invoke runtime TLS resolver. */
6022 bfd_put_NN (output_bfd, 0,
6023 globals->root.sgot->contents + off
6028 bfd_put_NN (output_bfd,
6029 relocation - dtpoff_base (info),
6030 globals->root.sgot->contents + off
6035 /* This TLS symbol is global. We emit a
6036 relocation to fixup the tls offset at load
6039 ELFNN_R_INFO (indx, AARCH64_R (TLS_DTPREL));
6042 (globals->root.sgot->output_section->vma
6043 + globals->root.sgot->output_offset + off
6046 loc = globals->root.srelgot->contents;
6047 loc += globals->root.srelgot->reloc_count++
6048 * RELOC_SIZE (globals);
6049 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6050 bfd_put_NN (output_bfd, (bfd_vma) 0,
6051 globals->root.sgot->contents + off
6057 bfd_put_NN (output_bfd, (bfd_vma) 1,
6058 globals->root.sgot->contents + off);
6059 bfd_put_NN (output_bfd,
6060 relocation - dtpoff_base (info),
6061 globals->root.sgot->contents + off
6065 symbol_got_offset_mark (input_bfd, h, r_symndx);
6069 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6070 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC:
6071 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6072 if (! symbol_got_offset_mark_p (input_bfd, h, r_symndx))
6074 bfd_boolean need_relocs = FALSE;
6079 off = symbol_got_offset (input_bfd, h, r_symndx);
6081 indx = h && h->dynindx != -1 ? h->dynindx : 0;
6084 (bfd_link_pic (info) || indx != 0) &&
6086 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6087 || h->root.type != bfd_link_hash_undefweak);
6089 BFD_ASSERT (globals->root.srelgot != NULL);
6093 Elf_Internal_Rela rela;
6096 rela.r_addend = relocation - dtpoff_base (info);
6100 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLS_TPREL));
6101 rela.r_offset = globals->root.sgot->output_section->vma +
6102 globals->root.sgot->output_offset + off;
6104 loc = globals->root.srelgot->contents;
6105 loc += globals->root.srelgot->reloc_count++
6106 * RELOC_SIZE (htab);
6108 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6110 bfd_put_NN (output_bfd, rela.r_addend,
6111 globals->root.sgot->contents + off);
6114 bfd_put_NN (output_bfd, relocation - tpoff_base (info),
6115 globals->root.sgot->contents + off);
6117 symbol_got_offset_mark (input_bfd, h, r_symndx);
6121 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
6122 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6123 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6124 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC:
6125 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6126 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd, h, r_symndx))
6128 bfd_boolean need_relocs = FALSE;
6129 int indx = h && h->dynindx != -1 ? h->dynindx : 0;
6130 bfd_vma off = symbol_tlsdesc_got_offset (input_bfd, h, r_symndx);
6132 need_relocs = (h == NULL
6133 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6134 || h->root.type != bfd_link_hash_undefweak);
6136 BFD_ASSERT (globals->root.srelgot != NULL);
6137 BFD_ASSERT (globals->root.sgot != NULL);
6142 Elf_Internal_Rela rela;
6143 rela.r_info = ELFNN_R_INFO (indx, AARCH64_R (TLSDESC));
6146 rela.r_offset = (globals->root.sgotplt->output_section->vma
6147 + globals->root.sgotplt->output_offset
6148 + off + globals->sgotplt_jump_table_size);
6151 rela.r_addend = relocation - dtpoff_base (info);
6153 /* Allocate the next available slot in the PLT reloc
6154 section to hold our R_AARCH64_TLSDESC, the next
6155 available slot is determined from reloc_count,
6156 which we step. But note, reloc_count was
6157 artifically moved down while allocating slots for
6158 real PLT relocs such that all of the PLT relocs
6159 will fit above the initial reloc_count and the
6160 extra stuff will fit below. */
6161 loc = globals->root.srelplt->contents;
6162 loc += globals->root.srelplt->reloc_count++
6163 * RELOC_SIZE (globals);
6165 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
6167 bfd_put_NN (output_bfd, (bfd_vma) 0,
6168 globals->root.sgotplt->contents + off +
6169 globals->sgotplt_jump_table_size);
6170 bfd_put_NN (output_bfd, (bfd_vma) 0,
6171 globals->root.sgotplt->contents + off +
6172 globals->sgotplt_jump_table_size +
6176 symbol_tlsdesc_got_offset_mark (input_bfd, h, r_symndx);
6187 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
6188 because such sections are not SEC_ALLOC and thus ld.so will
6189 not process them. */
6190 if (unresolved_reloc
6191 && !((input_section->flags & SEC_DEBUGGING) != 0
6193 && _bfd_elf_section_offset (output_bfd, info, input_section,
6194 +rel->r_offset) != (bfd_vma) - 1)
6196 (*_bfd_error_handler)
6198 ("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6199 input_bfd, input_section, (long) rel->r_offset, howto->name,
6200 h->root.root.string);
6204 if (r != bfd_reloc_ok && r != bfd_reloc_continue)
6206 bfd_reloc_code_real_type real_r_type
6207 = elfNN_aarch64_bfd_reloc_from_type (r_type);
6211 case bfd_reloc_overflow:
6212 if (!(*info->callbacks->reloc_overflow)
6213 (info, (h ? &h->root : NULL), name, howto->name, (bfd_vma) 0,
6214 input_bfd, input_section, rel->r_offset))
6216 if (real_r_type == BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
6217 || real_r_type == BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14)
6219 (*info->callbacks->warning)
6221 _("Too many GOT entries for -fpic, "
6222 "please recompile with -fPIC"),
6223 name, input_bfd, input_section, rel->r_offset);
6228 case bfd_reloc_undefined:
6229 if (!((*info->callbacks->undefined_symbol)
6230 (info, name, input_bfd, input_section,
6231 rel->r_offset, TRUE)))
6235 case bfd_reloc_outofrange:
6236 error_message = _("out of range");
6239 case bfd_reloc_notsupported:
6240 error_message = _("unsupported relocation");
6243 case bfd_reloc_dangerous:
6244 /* error_message should already be set. */
6248 error_message = _("unknown error");
6252 BFD_ASSERT (error_message != NULL);
6253 if (!((*info->callbacks->reloc_dangerous)
6254 (info, error_message, input_bfd, input_section,
6265 /* Set the right machine number. */
6268 elfNN_aarch64_object_p (bfd *abfd)
6271 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64_ilp32);
6273 bfd_default_set_arch_mach (abfd, bfd_arch_aarch64, bfd_mach_aarch64);
6278 /* Function to keep AArch64 specific flags in the ELF header. */
6281 elfNN_aarch64_set_private_flags (bfd *abfd, flagword flags)
6283 if (elf_flags_init (abfd) && elf_elfheader (abfd)->e_flags != flags)
6288 elf_elfheader (abfd)->e_flags = flags;
6289 elf_flags_init (abfd) = TRUE;
6295 /* Merge backend specific data from an object file to the output
6296 object file when linking. */
6299 elfNN_aarch64_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
6303 bfd_boolean flags_compatible = TRUE;
6306 /* Check if we have the same endianess. */
6307 if (!_bfd_generic_verify_endian_match (ibfd, obfd))
6310 if (!is_aarch64_elf (ibfd) || !is_aarch64_elf (obfd))
6313 /* The input BFD must have had its flags initialised. */
6314 /* The following seems bogus to me -- The flags are initialized in
6315 the assembler but I don't think an elf_flags_init field is
6316 written into the object. */
6317 /* BFD_ASSERT (elf_flags_init (ibfd)); */
6319 in_flags = elf_elfheader (ibfd)->e_flags;
6320 out_flags = elf_elfheader (obfd)->e_flags;
6322 if (!elf_flags_init (obfd))
6324 /* If the input is the default architecture and had the default
6325 flags then do not bother setting the flags for the output
6326 architecture, instead allow future merges to do this. If no
6327 future merges ever set these flags then they will retain their
6328 uninitialised values, which surprise surprise, correspond
6329 to the default values. */
6330 if (bfd_get_arch_info (ibfd)->the_default
6331 && elf_elfheader (ibfd)->e_flags == 0)
6334 elf_flags_init (obfd) = TRUE;
6335 elf_elfheader (obfd)->e_flags = in_flags;
6337 if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
6338 && bfd_get_arch_info (obfd)->the_default)
6339 return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd),
6340 bfd_get_mach (ibfd));
6345 /* Identical flags must be compatible. */
6346 if (in_flags == out_flags)
6349 /* Check to see if the input BFD actually contains any sections. If
6350 not, its flags may not have been initialised either, but it
6351 cannot actually cause any incompatiblity. Do not short-circuit
6352 dynamic objects; their section list may be emptied by
6353 elf_link_add_object_symbols.
6355 Also check to see if there are no code sections in the input.
6356 In this case there is no need to check for code specific flags.
6357 XXX - do we need to worry about floating-point format compatability
6358 in data sections ? */
6359 if (!(ibfd->flags & DYNAMIC))
6361 bfd_boolean null_input_bfd = TRUE;
6362 bfd_boolean only_data_sections = TRUE;
6364 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
6366 if ((bfd_get_section_flags (ibfd, sec)
6367 & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
6368 == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS))
6369 only_data_sections = FALSE;
6371 null_input_bfd = FALSE;
6375 if (null_input_bfd || only_data_sections)
6379 return flags_compatible;
6382 /* Display the flags field. */
6385 elfNN_aarch64_print_private_bfd_data (bfd *abfd, void *ptr)
6387 FILE *file = (FILE *) ptr;
6388 unsigned long flags;
6390 BFD_ASSERT (abfd != NULL && ptr != NULL);
6392 /* Print normal ELF private data. */
6393 _bfd_elf_print_private_bfd_data (abfd, ptr);
6395 flags = elf_elfheader (abfd)->e_flags;
6396 /* Ignore init flag - it may not be set, despite the flags field
6397 containing valid data. */
6399 /* xgettext:c-format */
6400 fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
6403 fprintf (file, _("<Unrecognised flag bits set>"));
6410 /* Update the got entry reference counts for the section being removed. */
6413 elfNN_aarch64_gc_sweep_hook (bfd *abfd,
6414 struct bfd_link_info *info,
6416 const Elf_Internal_Rela * relocs)
6418 struct elf_aarch64_link_hash_table *htab;
6419 Elf_Internal_Shdr *symtab_hdr;
6420 struct elf_link_hash_entry **sym_hashes;
6421 struct elf_aarch64_local_symbol *locals;
6422 const Elf_Internal_Rela *rel, *relend;
6424 if (bfd_link_relocatable (info))
6427 htab = elf_aarch64_hash_table (info);
6432 elf_section_data (sec)->local_dynrel = NULL;
6434 symtab_hdr = &elf_symtab_hdr (abfd);
6435 sym_hashes = elf_sym_hashes (abfd);
6437 locals = elf_aarch64_locals (abfd);
6439 relend = relocs + sec->reloc_count;
6440 for (rel = relocs; rel < relend; rel++)
6442 unsigned long r_symndx;
6443 unsigned int r_type;
6444 struct elf_link_hash_entry *h = NULL;
6446 r_symndx = ELFNN_R_SYM (rel->r_info);
6448 if (r_symndx >= symtab_hdr->sh_info)
6451 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6452 while (h->root.type == bfd_link_hash_indirect
6453 || h->root.type == bfd_link_hash_warning)
6454 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6458 Elf_Internal_Sym *isym;
6460 /* A local symbol. */
6461 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6464 /* Check relocation against local STT_GNU_IFUNC symbol. */
6466 && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
6468 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel, FALSE);
6476 struct elf_aarch64_link_hash_entry *eh;
6477 struct elf_dyn_relocs **pp;
6478 struct elf_dyn_relocs *p;
6480 eh = (struct elf_aarch64_link_hash_entry *) h;
6482 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
6485 /* Everything must go for SEC. */
6491 r_type = ELFNN_R_TYPE (rel->r_info);
6492 switch (aarch64_tls_transition (abfd,info, r_type, h ,r_symndx))
6494 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
6495 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
6496 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
6497 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
6498 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
6499 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
6500 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
6501 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
6502 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
6503 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6504 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6505 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
6506 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
6507 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6508 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6509 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6510 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6511 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6512 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
6513 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
6514 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6515 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
6516 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6517 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6520 if (h->got.refcount > 0)
6521 h->got.refcount -= 1;
6523 if (h->type == STT_GNU_IFUNC)
6525 if (h->plt.refcount > 0)
6526 h->plt.refcount -= 1;
6529 else if (locals != NULL)
6531 if (locals[r_symndx].got_refcount > 0)
6532 locals[r_symndx].got_refcount -= 1;
6536 case BFD_RELOC_AARCH64_CALL26:
6537 case BFD_RELOC_AARCH64_JUMP26:
6538 /* If this is a local symbol then we resolve it
6539 directly without creating a PLT entry. */
6543 if (h->plt.refcount > 0)
6544 h->plt.refcount -= 1;
6547 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
6548 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
6549 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
6550 case BFD_RELOC_AARCH64_MOVW_G0_NC:
6551 case BFD_RELOC_AARCH64_MOVW_G1_NC:
6552 case BFD_RELOC_AARCH64_MOVW_G2_NC:
6553 case BFD_RELOC_AARCH64_MOVW_G3:
6554 case BFD_RELOC_AARCH64_NN:
6555 if (h != NULL && bfd_link_executable (info))
6557 if (h->plt.refcount > 0)
6558 h->plt.refcount -= 1;
6570 /* Adjust a symbol defined by a dynamic object and referenced by a
6571 regular object. The current definition is in some section of the
6572 dynamic object, but we're not including those sections. We have to
6573 change the definition to something the rest of the link can
6577 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info *info,
6578 struct elf_link_hash_entry *h)
6580 struct elf_aarch64_link_hash_table *htab;
6583 /* If this is a function, put it in the procedure linkage table. We
6584 will fill in the contents of the procedure linkage table later,
6585 when we know the address of the .got section. */
6586 if (h->type == STT_FUNC || h->type == STT_GNU_IFUNC || h->needs_plt)
6588 if (h->plt.refcount <= 0
6589 || (h->type != STT_GNU_IFUNC
6590 && (SYMBOL_CALLS_LOCAL (info, h)
6591 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
6592 && h->root.type == bfd_link_hash_undefweak))))
6594 /* This case can occur if we saw a CALL26 reloc in
6595 an input file, but the symbol wasn't referred to
6596 by a dynamic object or all references were
6597 garbage collected. In which case we can end up
6599 h->plt.offset = (bfd_vma) - 1;
6606 /* Otherwise, reset to -1. */
6607 h->plt.offset = (bfd_vma) - 1;
6610 /* If this is a weak symbol, and there is a real definition, the
6611 processor independent code will have arranged for us to see the
6612 real definition first, and we can just use the same value. */
6613 if (h->u.weakdef != NULL)
6615 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
6616 || h->u.weakdef->root.type == bfd_link_hash_defweak);
6617 h->root.u.def.section = h->u.weakdef->root.u.def.section;
6618 h->root.u.def.value = h->u.weakdef->root.u.def.value;
6619 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
6620 h->non_got_ref = h->u.weakdef->non_got_ref;
6624 /* If we are creating a shared library, we must presume that the
6625 only references to the symbol are via the global offset table.
6626 For such cases we need not do anything here; the relocations will
6627 be handled correctly by relocate_section. */
6628 if (bfd_link_pic (info))
6631 /* If there are no references to this symbol that do not use the
6632 GOT, we don't need to generate a copy reloc. */
6633 if (!h->non_got_ref)
6636 /* If -z nocopyreloc was given, we won't generate them either. */
6637 if (info->nocopyreloc)
6643 /* We must allocate the symbol in our .dynbss section, which will
6644 become part of the .bss section of the executable. There will be
6645 an entry for this symbol in the .dynsym section. The dynamic
6646 object will contain position independent code, so all references
6647 from the dynamic object to this symbol will go through the global
6648 offset table. The dynamic linker will use the .dynsym entry to
6649 determine the address it must put in the global offset table, so
6650 both the dynamic object and the regular object will refer to the
6651 same memory location for the variable. */
6653 htab = elf_aarch64_hash_table (info);
6655 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
6656 to copy the initial value out of the dynamic object and into the
6657 runtime process image. */
6658 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
6660 htab->srelbss->size += RELOC_SIZE (htab);
6666 return _bfd_elf_adjust_dynamic_copy (info, h, s);
6671 elfNN_aarch64_allocate_local_symbols (bfd *abfd, unsigned number)
6673 struct elf_aarch64_local_symbol *locals;
6674 locals = elf_aarch64_locals (abfd);
6677 locals = (struct elf_aarch64_local_symbol *)
6678 bfd_zalloc (abfd, number * sizeof (struct elf_aarch64_local_symbol));
6681 elf_aarch64_locals (abfd) = locals;
6686 /* Create the .got section to hold the global offset table. */
6689 aarch64_elf_create_got_section (bfd *abfd, struct bfd_link_info *info)
6691 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
6694 struct elf_link_hash_entry *h;
6695 struct elf_link_hash_table *htab = elf_hash_table (info);
6697 /* This function may be called more than once. */
6698 s = bfd_get_linker_section (abfd, ".got");
6702 flags = bed->dynamic_sec_flags;
6704 s = bfd_make_section_anyway_with_flags (abfd,
6705 (bed->rela_plts_and_copies_p
6706 ? ".rela.got" : ".rel.got"),
6707 (bed->dynamic_sec_flags
6710 || ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
6714 s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
6716 || !bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
6719 htab->sgot->size += GOT_ENTRY_SIZE;
6721 if (bed->want_got_sym)
6723 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
6724 (or .got.plt) section. We don't do this in the linker script
6725 because we don't want to define the symbol if we are not creating
6726 a global offset table. */
6727 h = _bfd_elf_define_linkage_sym (abfd, info, s,
6728 "_GLOBAL_OFFSET_TABLE_");
6729 elf_hash_table (info)->hgot = h;
6734 if (bed->want_got_plt)
6736 s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
6738 || !bfd_set_section_alignment (abfd, s,
6739 bed->s->log_file_align))
6744 /* The first bit of the global offset table is the header. */
6745 s->size += bed->got_header_size;
6750 /* Look through the relocs for a section during the first phase. */
6753 elfNN_aarch64_check_relocs (bfd *abfd, struct bfd_link_info *info,
6754 asection *sec, const Elf_Internal_Rela *relocs)
6756 Elf_Internal_Shdr *symtab_hdr;
6757 struct elf_link_hash_entry **sym_hashes;
6758 const Elf_Internal_Rela *rel;
6759 const Elf_Internal_Rela *rel_end;
6762 struct elf_aarch64_link_hash_table *htab;
6764 if (bfd_link_relocatable (info))
6767 BFD_ASSERT (is_aarch64_elf (abfd));
6769 htab = elf_aarch64_hash_table (info);
6772 symtab_hdr = &elf_symtab_hdr (abfd);
6773 sym_hashes = elf_sym_hashes (abfd);
6775 rel_end = relocs + sec->reloc_count;
6776 for (rel = relocs; rel < rel_end; rel++)
6778 struct elf_link_hash_entry *h;
6779 unsigned long r_symndx;
6780 unsigned int r_type;
6781 bfd_reloc_code_real_type bfd_r_type;
6782 Elf_Internal_Sym *isym;
6784 r_symndx = ELFNN_R_SYM (rel->r_info);
6785 r_type = ELFNN_R_TYPE (rel->r_info);
6787 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
6789 (*_bfd_error_handler) (_("%B: bad symbol index: %d"), abfd,
6794 if (r_symndx < symtab_hdr->sh_info)
6796 /* A local symbol. */
6797 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6802 /* Check relocation against local STT_GNU_IFUNC symbol. */
6803 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
6805 h = elfNN_aarch64_get_local_sym_hash (htab, abfd, rel,
6810 /* Fake a STT_GNU_IFUNC symbol. */
6811 h->type = STT_GNU_IFUNC;
6814 h->forced_local = 1;
6815 h->root.type = bfd_link_hash_defined;
6822 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
6823 while (h->root.type == bfd_link_hash_indirect
6824 || h->root.type == bfd_link_hash_warning)
6825 h = (struct elf_link_hash_entry *) h->root.u.i.link;
6827 /* PR15323, ref flags aren't set for references in the same
6829 h->root.non_ir_ref = 1;
6832 /* Could be done earlier, if h were already available. */
6833 bfd_r_type = aarch64_tls_transition (abfd, info, r_type, h, r_symndx);
6837 /* Create the ifunc sections for static executables. If we
6838 never see an indirect function symbol nor we are building
6839 a static executable, those sections will be empty and
6840 won't appear in output. */
6846 case BFD_RELOC_AARCH64_ADD_LO12:
6847 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
6848 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
6849 case BFD_RELOC_AARCH64_CALL26:
6850 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
6851 case BFD_RELOC_AARCH64_JUMP26:
6852 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
6853 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
6854 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
6855 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
6856 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
6857 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
6858 case BFD_RELOC_AARCH64_NN:
6859 if (htab->root.dynobj == NULL)
6860 htab->root.dynobj = abfd;
6861 if (!_bfd_elf_create_ifunc_sections (htab->root.dynobj, info))
6866 /* It is referenced by a non-shared object. */
6868 h->root.non_ir_ref = 1;
6873 case BFD_RELOC_AARCH64_NN:
6875 /* We don't need to handle relocs into sections not going into
6876 the "real" output. */
6877 if ((sec->flags & SEC_ALLOC) == 0)
6882 if (!bfd_link_pic (info))
6885 h->plt.refcount += 1;
6886 h->pointer_equality_needed = 1;
6889 /* No need to do anything if we're not creating a shared
6891 if (! bfd_link_pic (info))
6895 struct elf_dyn_relocs *p;
6896 struct elf_dyn_relocs **head;
6898 /* We must copy these reloc types into the output file.
6899 Create a reloc section in dynobj and make room for
6903 if (htab->root.dynobj == NULL)
6904 htab->root.dynobj = abfd;
6906 sreloc = _bfd_elf_make_dynamic_reloc_section
6907 (sec, htab->root.dynobj, LOG_FILE_ALIGN, abfd, /*rela? */ TRUE);
6913 /* If this is a global symbol, we count the number of
6914 relocations we need for this symbol. */
6917 struct elf_aarch64_link_hash_entry *eh;
6918 eh = (struct elf_aarch64_link_hash_entry *) h;
6919 head = &eh->dyn_relocs;
6923 /* Track dynamic relocs needed for local syms too.
6924 We really need local syms available to do this
6930 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
6935 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
6939 /* Beware of type punned pointers vs strict aliasing
6941 vpp = &(elf_section_data (s)->local_dynrel);
6942 head = (struct elf_dyn_relocs **) vpp;
6946 if (p == NULL || p->sec != sec)
6948 bfd_size_type amt = sizeof *p;
6949 p = ((struct elf_dyn_relocs *)
6950 bfd_zalloc (htab->root.dynobj, amt));
6963 /* RR: We probably want to keep a consistency check that
6964 there are no dangling GOT_PAGE relocs. */
6965 case BFD_RELOC_AARCH64_ADR_GOT_PAGE:
6966 case BFD_RELOC_AARCH64_GOT_LD_PREL19:
6967 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14:
6968 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC:
6969 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15:
6970 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15:
6971 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC:
6972 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
6973 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12_NC:
6974 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21:
6975 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
6976 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC:
6977 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC:
6978 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
6979 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC:
6980 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21:
6981 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:
6982 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
6983 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC:
6984 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
6985 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19:
6986 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC:
6987 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21:
6988 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21:
6991 unsigned old_got_type;
6993 got_type = aarch64_reloc_got_type (bfd_r_type);
6997 h->got.refcount += 1;
6998 old_got_type = elf_aarch64_hash_entry (h)->got_type;
7002 struct elf_aarch64_local_symbol *locals;
7004 if (!elfNN_aarch64_allocate_local_symbols
7005 (abfd, symtab_hdr->sh_info))
7008 locals = elf_aarch64_locals (abfd);
7009 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
7010 locals[r_symndx].got_refcount += 1;
7011 old_got_type = locals[r_symndx].got_type;
7014 /* If a variable is accessed with both general dynamic TLS
7015 methods, two slots may be created. */
7016 if (GOT_TLS_GD_ANY_P (old_got_type) && GOT_TLS_GD_ANY_P (got_type))
7017 got_type |= old_got_type;
7019 /* We will already have issued an error message if there
7020 is a TLS/non-TLS mismatch, based on the symbol type.
7021 So just combine any TLS types needed. */
7022 if (old_got_type != GOT_UNKNOWN && old_got_type != GOT_NORMAL
7023 && got_type != GOT_NORMAL)
7024 got_type |= old_got_type;
7026 /* If the symbol is accessed by both IE and GD methods, we
7027 are able to relax. Turn off the GD flag, without
7028 messing up with any other kind of TLS types that may be
7030 if ((got_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (got_type))
7031 got_type &= ~ (GOT_TLSDESC_GD | GOT_TLS_GD);
7033 if (old_got_type != got_type)
7036 elf_aarch64_hash_entry (h)->got_type = got_type;
7039 struct elf_aarch64_local_symbol *locals;
7040 locals = elf_aarch64_locals (abfd);
7041 BFD_ASSERT (r_symndx < symtab_hdr->sh_info);
7042 locals[r_symndx].got_type = got_type;
7046 if (htab->root.dynobj == NULL)
7047 htab->root.dynobj = abfd;
7048 if (! aarch64_elf_create_got_section (htab->root.dynobj, info))
7053 case BFD_RELOC_AARCH64_MOVW_G0_NC:
7054 case BFD_RELOC_AARCH64_MOVW_G1_NC:
7055 case BFD_RELOC_AARCH64_MOVW_G2_NC:
7056 case BFD_RELOC_AARCH64_MOVW_G3:
7057 if (bfd_link_pic (info))
7059 int howto_index = bfd_r_type - BFD_RELOC_AARCH64_RELOC_START;
7060 (*_bfd_error_handler)
7061 (_("%B: relocation %s against `%s' can not be used when making "
7062 "a shared object; recompile with -fPIC"),
7063 abfd, elfNN_aarch64_howto_table[howto_index].name,
7064 (h) ? h->root.root.string : "a local symbol");
7065 bfd_set_error (bfd_error_bad_value);
7069 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL:
7070 case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
7071 case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
7072 if (h != NULL && bfd_link_executable (info))
7074 /* If this reloc is in a read-only section, we might
7075 need a copy reloc. We can't check reliably at this
7076 stage whether the section is read-only, as input
7077 sections have not yet been mapped to output sections.
7078 Tentatively set the flag for now, and correct in
7079 adjust_dynamic_symbol. */
7081 h->plt.refcount += 1;
7082 h->pointer_equality_needed = 1;
7084 /* FIXME:: RR need to handle these in shared libraries
7085 and essentially bomb out as these being non-PIC
7086 relocations in shared libraries. */
7089 case BFD_RELOC_AARCH64_CALL26:
7090 case BFD_RELOC_AARCH64_JUMP26:
7091 /* If this is a local symbol then we resolve it
7092 directly without creating a PLT entry. */
7097 if (h->plt.refcount <= 0)
7098 h->plt.refcount = 1;
7100 h->plt.refcount += 1;
7111 /* Treat mapping symbols as special target symbols. */
7114 elfNN_aarch64_is_target_special_symbol (bfd *abfd ATTRIBUTE_UNUSED,
7117 return bfd_is_aarch64_special_symbol_name (sym->name,
7118 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY);
7121 /* This is a copy of elf_find_function () from elf.c except that
7122 AArch64 mapping symbols are ignored when looking for function names. */
7125 aarch64_elf_find_function (bfd *abfd ATTRIBUTE_UNUSED,
7129 const char **filename_ptr,
7130 const char **functionname_ptr)
7132 const char *filename = NULL;
7133 asymbol *func = NULL;
7134 bfd_vma low_func = 0;
7137 for (p = symbols; *p != NULL; p++)
7141 q = (elf_symbol_type *) * p;
7143 switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
7148 filename = bfd_asymbol_name (&q->symbol);
7152 /* Skip mapping symbols. */
7153 if ((q->symbol.flags & BSF_LOCAL)
7154 && (bfd_is_aarch64_special_symbol_name
7155 (q->symbol.name, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY)))
7158 if (bfd_get_section (&q->symbol) == section
7159 && q->symbol.value >= low_func && q->symbol.value <= offset)
7161 func = (asymbol *) q;
7162 low_func = q->symbol.value;
7172 *filename_ptr = filename;
7173 if (functionname_ptr)
7174 *functionname_ptr = bfd_asymbol_name (func);
7180 /* Find the nearest line to a particular section and offset, for error
7181 reporting. This code is a duplicate of the code in elf.c, except
7182 that it uses aarch64_elf_find_function. */
7185 elfNN_aarch64_find_nearest_line (bfd *abfd,
7189 const char **filename_ptr,
7190 const char **functionname_ptr,
7191 unsigned int *line_ptr,
7192 unsigned int *discriminator_ptr)
7194 bfd_boolean found = FALSE;
7196 if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
7197 filename_ptr, functionname_ptr,
7198 line_ptr, discriminator_ptr,
7199 dwarf_debug_sections, 0,
7200 &elf_tdata (abfd)->dwarf2_find_line_info))
7202 if (!*functionname_ptr)
7203 aarch64_elf_find_function (abfd, symbols, section, offset,
7204 *filename_ptr ? NULL : filename_ptr,
7210 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
7211 toolchain uses DWARF1. */
7213 if (!_bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
7214 &found, filename_ptr,
7215 functionname_ptr, line_ptr,
7216 &elf_tdata (abfd)->line_info))
7219 if (found && (*functionname_ptr || *line_ptr))
7222 if (symbols == NULL)
7225 if (!aarch64_elf_find_function (abfd, symbols, section, offset,
7226 filename_ptr, functionname_ptr))
7234 elfNN_aarch64_find_inliner_info (bfd *abfd,
7235 const char **filename_ptr,
7236 const char **functionname_ptr,
7237 unsigned int *line_ptr)
7240 found = _bfd_dwarf2_find_inliner_info
7241 (abfd, filename_ptr,
7242 functionname_ptr, line_ptr, &elf_tdata (abfd)->dwarf2_find_line_info);
7248 elfNN_aarch64_post_process_headers (bfd *abfd,
7249 struct bfd_link_info *link_info)
7251 Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
7253 i_ehdrp = elf_elfheader (abfd);
7254 i_ehdrp->e_ident[EI_ABIVERSION] = AARCH64_ELF_ABI_VERSION;
7256 _bfd_elf_post_process_headers (abfd, link_info);
7259 static enum elf_reloc_type_class
7260 elfNN_aarch64_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
7261 const asection *rel_sec ATTRIBUTE_UNUSED,
7262 const Elf_Internal_Rela *rela)
7264 switch ((int) ELFNN_R_TYPE (rela->r_info))
7266 case AARCH64_R (RELATIVE):
7267 return reloc_class_relative;
7268 case AARCH64_R (JUMP_SLOT):
7269 return reloc_class_plt;
7270 case AARCH64_R (COPY):
7271 return reloc_class_copy;
7273 return reloc_class_normal;
7277 /* Handle an AArch64 specific section when reading an object file. This is
7278 called when bfd_section_from_shdr finds a section with an unknown
7282 elfNN_aarch64_section_from_shdr (bfd *abfd,
7283 Elf_Internal_Shdr *hdr,
7284 const char *name, int shindex)
7286 /* There ought to be a place to keep ELF backend specific flags, but
7287 at the moment there isn't one. We just keep track of the
7288 sections by their name, instead. Fortunately, the ABI gives
7289 names for all the AArch64 specific sections, so we will probably get
7291 switch (hdr->sh_type)
7293 case SHT_AARCH64_ATTRIBUTES:
7300 if (!_bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
7306 /* A structure used to record a list of sections, independently
7307 of the next and prev fields in the asection structure. */
7308 typedef struct section_list
7311 struct section_list *next;
7312 struct section_list *prev;
7316 /* Unfortunately we need to keep a list of sections for which
7317 an _aarch64_elf_section_data structure has been allocated. This
7318 is because it is possible for functions like elfNN_aarch64_write_section
7319 to be called on a section which has had an elf_data_structure
7320 allocated for it (and so the used_by_bfd field is valid) but
7321 for which the AArch64 extended version of this structure - the
7322 _aarch64_elf_section_data structure - has not been allocated. */
7323 static section_list *sections_with_aarch64_elf_section_data = NULL;
7326 record_section_with_aarch64_elf_section_data (asection *sec)
7328 struct section_list *entry;
7330 entry = bfd_malloc (sizeof (*entry));
7334 entry->next = sections_with_aarch64_elf_section_data;
7336 if (entry->next != NULL)
7337 entry->next->prev = entry;
7338 sections_with_aarch64_elf_section_data = entry;
7341 static struct section_list *
7342 find_aarch64_elf_section_entry (asection *sec)
7344 struct section_list *entry;
7345 static struct section_list *last_entry = NULL;
7347 /* This is a short cut for the typical case where the sections are added
7348 to the sections_with_aarch64_elf_section_data list in forward order and
7349 then looked up here in backwards order. This makes a real difference
7350 to the ld-srec/sec64k.exp linker test. */
7351 entry = sections_with_aarch64_elf_section_data;
7352 if (last_entry != NULL)
7354 if (last_entry->sec == sec)
7356 else if (last_entry->next != NULL && last_entry->next->sec == sec)
7357 entry = last_entry->next;
7360 for (; entry; entry = entry->next)
7361 if (entry->sec == sec)
7365 /* Record the entry prior to this one - it is the entry we are
7366 most likely to want to locate next time. Also this way if we
7367 have been called from
7368 unrecord_section_with_aarch64_elf_section_data () we will not
7369 be caching a pointer that is about to be freed. */
7370 last_entry = entry->prev;
7376 unrecord_section_with_aarch64_elf_section_data (asection *sec)
7378 struct section_list *entry;
7380 entry = find_aarch64_elf_section_entry (sec);
7384 if (entry->prev != NULL)
7385 entry->prev->next = entry->next;
7386 if (entry->next != NULL)
7387 entry->next->prev = entry->prev;
7388 if (entry == sections_with_aarch64_elf_section_data)
7389 sections_with_aarch64_elf_section_data = entry->next;
7398 struct bfd_link_info *info;
7401 int (*func) (void *, const char *, Elf_Internal_Sym *,
7402 asection *, struct elf_link_hash_entry *);
7403 } output_arch_syminfo;
7405 enum map_symbol_type
7412 /* Output a single mapping symbol. */
7415 elfNN_aarch64_output_map_sym (output_arch_syminfo *osi,
7416 enum map_symbol_type type, bfd_vma offset)
7418 static const char *names[2] = { "$x", "$d" };
7419 Elf_Internal_Sym sym;
7421 sym.st_value = (osi->sec->output_section->vma
7422 + osi->sec->output_offset + offset);
7425 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_NOTYPE);
7426 sym.st_shndx = osi->sec_shndx;
7427 return osi->func (osi->finfo, names[type], &sym, osi->sec, NULL) == 1;
7430 /* Output a single local symbol for a generated stub. */
7433 elfNN_aarch64_output_stub_sym (output_arch_syminfo *osi, const char *name,
7434 bfd_vma offset, bfd_vma size)
7436 Elf_Internal_Sym sym;
7438 sym.st_value = (osi->sec->output_section->vma
7439 + osi->sec->output_offset + offset);
7442 sym.st_info = ELF_ST_INFO (STB_LOCAL, STT_FUNC);
7443 sym.st_shndx = osi->sec_shndx;
7444 return osi->func (osi->finfo, name, &sym, osi->sec, NULL) == 1;
7448 aarch64_map_one_stub (struct bfd_hash_entry *gen_entry, void *in_arg)
7450 struct elf_aarch64_stub_hash_entry *stub_entry;
7454 output_arch_syminfo *osi;
7456 /* Massage our args to the form they really have. */
7457 stub_entry = (struct elf_aarch64_stub_hash_entry *) gen_entry;
7458 osi = (output_arch_syminfo *) in_arg;
7460 stub_sec = stub_entry->stub_sec;
7462 /* Ensure this stub is attached to the current section being
7464 if (stub_sec != osi->sec)
7467 addr = (bfd_vma) stub_entry->stub_offset;
7469 stub_name = stub_entry->output_name;
7471 switch (stub_entry->stub_type)
7473 case aarch64_stub_adrp_branch:
7474 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7475 sizeof (aarch64_adrp_branch_stub)))
7477 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7480 case aarch64_stub_long_branch:
7481 if (!elfNN_aarch64_output_stub_sym
7482 (osi, stub_name, addr, sizeof (aarch64_long_branch_stub)))
7484 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7486 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_DATA, addr + 16))
7489 case aarch64_stub_erratum_835769_veneer:
7490 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7491 sizeof (aarch64_erratum_835769_stub)))
7493 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7496 case aarch64_stub_erratum_843419_veneer:
7497 if (!elfNN_aarch64_output_stub_sym (osi, stub_name, addr,
7498 sizeof (aarch64_erratum_843419_stub)))
7500 if (!elfNN_aarch64_output_map_sym (osi, AARCH64_MAP_INSN, addr))
7511 /* Output mapping symbols for linker generated sections. */
7514 elfNN_aarch64_output_arch_local_syms (bfd *output_bfd,
7515 struct bfd_link_info *info,
7517 int (*func) (void *, const char *,
7520 struct elf_link_hash_entry
7523 output_arch_syminfo osi;
7524 struct elf_aarch64_link_hash_table *htab;
7526 htab = elf_aarch64_hash_table (info);
7532 /* Long calls stubs. */
7533 if (htab->stub_bfd && htab->stub_bfd->sections)
7537 for (stub_sec = htab->stub_bfd->sections;
7538 stub_sec != NULL; stub_sec = stub_sec->next)
7540 /* Ignore non-stub sections. */
7541 if (!strstr (stub_sec->name, STUB_SUFFIX))
7546 osi.sec_shndx = _bfd_elf_section_from_bfd_section
7547 (output_bfd, osi.sec->output_section);
7549 /* The first instruction in a stub is always a branch. */
7550 if (!elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0))
7553 bfd_hash_traverse (&htab->stub_hash_table, aarch64_map_one_stub,
7558 /* Finally, output mapping symbols for the PLT. */
7559 if (!htab->root.splt || htab->root.splt->size == 0)
7562 osi.sec_shndx = _bfd_elf_section_from_bfd_section
7563 (output_bfd, htab->root.splt->output_section);
7564 osi.sec = htab->root.splt;
7566 elfNN_aarch64_output_map_sym (&osi, AARCH64_MAP_INSN, 0);
7572 /* Allocate target specific section data. */
7575 elfNN_aarch64_new_section_hook (bfd *abfd, asection *sec)
7577 if (!sec->used_by_bfd)
7579 _aarch64_elf_section_data *sdata;
7580 bfd_size_type amt = sizeof (*sdata);
7582 sdata = bfd_zalloc (abfd, amt);
7585 sec->used_by_bfd = sdata;
7588 record_section_with_aarch64_elf_section_data (sec);
7590 return _bfd_elf_new_section_hook (abfd, sec);
7595 unrecord_section_via_map_over_sections (bfd *abfd ATTRIBUTE_UNUSED,
7597 void *ignore ATTRIBUTE_UNUSED)
7599 unrecord_section_with_aarch64_elf_section_data (sec);
7603 elfNN_aarch64_close_and_cleanup (bfd *abfd)
7606 bfd_map_over_sections (abfd,
7607 unrecord_section_via_map_over_sections, NULL);
7609 return _bfd_elf_close_and_cleanup (abfd);
7613 elfNN_aarch64_bfd_free_cached_info (bfd *abfd)
7616 bfd_map_over_sections (abfd,
7617 unrecord_section_via_map_over_sections, NULL);
7619 return _bfd_free_cached_info (abfd);
7622 /* Create dynamic sections. This is different from the ARM backend in that
7623 the got, plt, gotplt and their relocation sections are all created in the
7624 standard part of the bfd elf backend. */
7627 elfNN_aarch64_create_dynamic_sections (bfd *dynobj,
7628 struct bfd_link_info *info)
7630 struct elf_aarch64_link_hash_table *htab;
7632 /* We need to create .got section. */
7633 if (!aarch64_elf_create_got_section (dynobj, info))
7636 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
7639 htab = elf_aarch64_hash_table (info);
7640 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
7641 if (!bfd_link_pic (info))
7642 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
7644 if (!htab->sdynbss || (!bfd_link_pic (info) && !htab->srelbss))
7651 /* Allocate space in .plt, .got and associated reloc sections for
7655 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
7657 struct bfd_link_info *info;
7658 struct elf_aarch64_link_hash_table *htab;
7659 struct elf_aarch64_link_hash_entry *eh;
7660 struct elf_dyn_relocs *p;
7662 /* An example of a bfd_link_hash_indirect symbol is versioned
7663 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
7664 -> __gxx_personality_v0(bfd_link_hash_defined)
7666 There is no need to process bfd_link_hash_indirect symbols here
7667 because we will also be presented with the concrete instance of
7668 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
7669 called to copy all relevant data from the generic to the concrete
7672 if (h->root.type == bfd_link_hash_indirect)
7675 if (h->root.type == bfd_link_hash_warning)
7676 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7678 info = (struct bfd_link_info *) inf;
7679 htab = elf_aarch64_hash_table (info);
7681 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
7682 here if it is defined and referenced in a non-shared object. */
7683 if (h->type == STT_GNU_IFUNC
7686 else if (htab->root.dynamic_sections_created && h->plt.refcount > 0)
7688 /* Make sure this symbol is output as a dynamic symbol.
7689 Undefined weak syms won't yet be marked as dynamic. */
7690 if (h->dynindx == -1 && !h->forced_local)
7692 if (!bfd_elf_link_record_dynamic_symbol (info, h))
7696 if (bfd_link_pic (info) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
7698 asection *s = htab->root.splt;
7700 /* If this is the first .plt entry, make room for the special
7703 s->size += htab->plt_header_size;
7705 h->plt.offset = s->size;
7707 /* If this symbol is not defined in a regular file, and we are
7708 not generating a shared library, then set the symbol to this
7709 location in the .plt. This is required to make function
7710 pointers compare as equal between the normal executable and
7711 the shared library. */
7712 if (!bfd_link_pic (info) && !h->def_regular)
7714 h->root.u.def.section = s;
7715 h->root.u.def.value = h->plt.offset;
7718 /* Make room for this entry. For now we only create the
7719 small model PLT entries. We later need to find a way
7720 of relaxing into these from the large model PLT entries. */
7721 s->size += PLT_SMALL_ENTRY_SIZE;
7723 /* We also need to make an entry in the .got.plt section, which
7724 will be placed in the .got section by the linker script. */
7725 htab->root.sgotplt->size += GOT_ENTRY_SIZE;
7727 /* We also need to make an entry in the .rela.plt section. */
7728 htab->root.srelplt->size += RELOC_SIZE (htab);
7730 /* We need to ensure that all GOT entries that serve the PLT
7731 are consecutive with the special GOT slots [0] [1] and
7732 [2]. Any addtional relocations, such as
7733 R_AARCH64_TLSDESC, must be placed after the PLT related
7734 entries. We abuse the reloc_count such that during
7735 sizing we adjust reloc_count to indicate the number of
7736 PLT related reserved entries. In subsequent phases when
7737 filling in the contents of the reloc entries, PLT related
7738 entries are placed by computing their PLT index (0
7739 .. reloc_count). While other none PLT relocs are placed
7740 at the slot indicated by reloc_count and reloc_count is
7743 htab->root.srelplt->reloc_count++;
7747 h->plt.offset = (bfd_vma) - 1;
7753 h->plt.offset = (bfd_vma) - 1;
7757 eh = (struct elf_aarch64_link_hash_entry *) h;
7758 eh->tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
7760 if (h->got.refcount > 0)
7763 unsigned got_type = elf_aarch64_hash_entry (h)->got_type;
7765 h->got.offset = (bfd_vma) - 1;
7767 dyn = htab->root.dynamic_sections_created;
7769 /* Make sure this symbol is output as a dynamic symbol.
7770 Undefined weak syms won't yet be marked as dynamic. */
7771 if (dyn && h->dynindx == -1 && !h->forced_local)
7773 if (!bfd_elf_link_record_dynamic_symbol (info, h))
7777 if (got_type == GOT_UNKNOWN)
7780 else if (got_type == GOT_NORMAL)
7782 h->got.offset = htab->root.sgot->size;
7783 htab->root.sgot->size += GOT_ENTRY_SIZE;
7784 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7785 || h->root.type != bfd_link_hash_undefweak)
7786 && (bfd_link_pic (info)
7787 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
7789 htab->root.srelgot->size += RELOC_SIZE (htab);
7795 if (got_type & GOT_TLSDESC_GD)
7797 eh->tlsdesc_got_jump_table_offset =
7798 (htab->root.sgotplt->size
7799 - aarch64_compute_jump_table_size (htab));
7800 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
7801 h->got.offset = (bfd_vma) - 2;
7804 if (got_type & GOT_TLS_GD)
7806 h->got.offset = htab->root.sgot->size;
7807 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
7810 if (got_type & GOT_TLS_IE)
7812 h->got.offset = htab->root.sgot->size;
7813 htab->root.sgot->size += GOT_ENTRY_SIZE;
7816 indx = h && h->dynindx != -1 ? h->dynindx : 0;
7817 if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
7818 || h->root.type != bfd_link_hash_undefweak)
7819 && (bfd_link_pic (info)
7821 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
7823 if (got_type & GOT_TLSDESC_GD)
7825 htab->root.srelplt->size += RELOC_SIZE (htab);
7826 /* Note reloc_count not incremented here! We have
7827 already adjusted reloc_count for this relocation
7830 /* TLSDESC PLT is now needed, but not yet determined. */
7831 htab->tlsdesc_plt = (bfd_vma) - 1;
7834 if (got_type & GOT_TLS_GD)
7835 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
7837 if (got_type & GOT_TLS_IE)
7838 htab->root.srelgot->size += RELOC_SIZE (htab);
7844 h->got.offset = (bfd_vma) - 1;
7847 if (eh->dyn_relocs == NULL)
7850 /* In the shared -Bsymbolic case, discard space allocated for
7851 dynamic pc-relative relocs against symbols which turn out to be
7852 defined in regular objects. For the normal shared case, discard
7853 space for pc-relative relocs that have become local due to symbol
7854 visibility changes. */
7856 if (bfd_link_pic (info))
7858 /* Relocs that use pc_count are those that appear on a call
7859 insn, or certain REL relocs that can generated via assembly.
7860 We want calls to protected symbols to resolve directly to the
7861 function rather than going via the plt. If people want
7862 function pointer comparisons to work as expected then they
7863 should avoid writing weird assembly. */
7864 if (SYMBOL_CALLS_LOCAL (info, h))
7866 struct elf_dyn_relocs **pp;
7868 for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
7870 p->count -= p->pc_count;
7879 /* Also discard relocs on undefined weak syms with non-default
7881 if (eh->dyn_relocs != NULL && h->root.type == bfd_link_hash_undefweak)
7883 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
7884 eh->dyn_relocs = NULL;
7886 /* Make sure undefined weak symbols are output as a dynamic
7888 else if (h->dynindx == -1
7890 && !bfd_elf_link_record_dynamic_symbol (info, h))
7895 else if (ELIMINATE_COPY_RELOCS)
7897 /* For the non-shared case, discard space for relocs against
7898 symbols which turn out to need copy relocs or are not
7904 || (htab->root.dynamic_sections_created
7905 && (h->root.type == bfd_link_hash_undefweak
7906 || h->root.type == bfd_link_hash_undefined))))
7908 /* Make sure this symbol is output as a dynamic symbol.
7909 Undefined weak syms won't yet be marked as dynamic. */
7910 if (h->dynindx == -1
7912 && !bfd_elf_link_record_dynamic_symbol (info, h))
7915 /* If that succeeded, we know we'll be keeping all the
7917 if (h->dynindx != -1)
7921 eh->dyn_relocs = NULL;
7926 /* Finally, allocate space. */
7927 for (p = eh->dyn_relocs; p != NULL; p = p->next)
7931 sreloc = elf_section_data (p->sec)->sreloc;
7933 BFD_ASSERT (sreloc != NULL);
7935 sreloc->size += p->count * RELOC_SIZE (htab);
7941 /* Allocate space in .plt, .got and associated reloc sections for
7942 ifunc dynamic relocs. */
7945 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry *h,
7948 struct bfd_link_info *info;
7949 struct elf_aarch64_link_hash_table *htab;
7950 struct elf_aarch64_link_hash_entry *eh;
7952 /* An example of a bfd_link_hash_indirect symbol is versioned
7953 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
7954 -> __gxx_personality_v0(bfd_link_hash_defined)
7956 There is no need to process bfd_link_hash_indirect symbols here
7957 because we will also be presented with the concrete instance of
7958 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
7959 called to copy all relevant data from the generic to the concrete
7962 if (h->root.type == bfd_link_hash_indirect)
7965 if (h->root.type == bfd_link_hash_warning)
7966 h = (struct elf_link_hash_entry *) h->root.u.i.link;
7968 info = (struct bfd_link_info *) inf;
7969 htab = elf_aarch64_hash_table (info);
7971 eh = (struct elf_aarch64_link_hash_entry *) h;
7973 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
7974 here if it is defined and referenced in a non-shared object. */
7975 if (h->type == STT_GNU_IFUNC
7977 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
7979 htab->plt_entry_size,
7980 htab->plt_header_size,
7985 /* Allocate space in .plt, .got and associated reloc sections for
7986 local dynamic relocs. */
7989 elfNN_aarch64_allocate_local_dynrelocs (void **slot, void *inf)
7991 struct elf_link_hash_entry *h
7992 = (struct elf_link_hash_entry *) *slot;
7994 if (h->type != STT_GNU_IFUNC
7998 || h->root.type != bfd_link_hash_defined)
8001 return elfNN_aarch64_allocate_dynrelocs (h, inf);
8004 /* Allocate space in .plt, .got and associated reloc sections for
8005 local ifunc dynamic relocs. */
8008 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot, void *inf)
8010 struct elf_link_hash_entry *h
8011 = (struct elf_link_hash_entry *) *slot;
8013 if (h->type != STT_GNU_IFUNC
8017 || h->root.type != bfd_link_hash_defined)
8020 return elfNN_aarch64_allocate_ifunc_dynrelocs (h, inf);
8023 /* Find any dynamic relocs that apply to read-only sections. */
8026 aarch64_readonly_dynrelocs (struct elf_link_hash_entry * h, void * inf)
8028 struct elf_aarch64_link_hash_entry * eh;
8029 struct elf_dyn_relocs * p;
8031 eh = (struct elf_aarch64_link_hash_entry *) h;
8032 for (p = eh->dyn_relocs; p != NULL; p = p->next)
8034 asection *s = p->sec;
8036 if (s != NULL && (s->flags & SEC_READONLY) != 0)
8038 struct bfd_link_info *info = (struct bfd_link_info *) inf;
8040 info->flags |= DF_TEXTREL;
8042 /* Not an error, just cut short the traversal. */
8049 /* This is the most important function of all . Innocuosly named
8052 elfNN_aarch64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
8053 struct bfd_link_info *info)
8055 struct elf_aarch64_link_hash_table *htab;
8061 htab = elf_aarch64_hash_table ((info));
8062 dynobj = htab->root.dynobj;
8064 BFD_ASSERT (dynobj != NULL);
8066 if (htab->root.dynamic_sections_created)
8068 if (bfd_link_executable (info) && !info->nointerp)
8070 s = bfd_get_linker_section (dynobj, ".interp");
8073 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
8074 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
8078 /* Set up .got offsets for local syms, and space for local dynamic
8080 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8082 struct elf_aarch64_local_symbol *locals = NULL;
8083 Elf_Internal_Shdr *symtab_hdr;
8087 if (!is_aarch64_elf (ibfd))
8090 for (s = ibfd->sections; s != NULL; s = s->next)
8092 struct elf_dyn_relocs *p;
8094 for (p = (struct elf_dyn_relocs *)
8095 (elf_section_data (s)->local_dynrel); p != NULL; p = p->next)
8097 if (!bfd_is_abs_section (p->sec)
8098 && bfd_is_abs_section (p->sec->output_section))
8100 /* Input section has been discarded, either because
8101 it is a copy of a linkonce section or due to
8102 linker script /DISCARD/, so we'll be discarding
8105 else if (p->count != 0)
8107 srel = elf_section_data (p->sec)->sreloc;
8108 srel->size += p->count * RELOC_SIZE (htab);
8109 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
8110 info->flags |= DF_TEXTREL;
8115 locals = elf_aarch64_locals (ibfd);
8119 symtab_hdr = &elf_symtab_hdr (ibfd);
8120 srel = htab->root.srelgot;
8121 for (i = 0; i < symtab_hdr->sh_info; i++)
8123 locals[i].got_offset = (bfd_vma) - 1;
8124 locals[i].tlsdesc_got_jump_table_offset = (bfd_vma) - 1;
8125 if (locals[i].got_refcount > 0)
8127 unsigned got_type = locals[i].got_type;
8128 if (got_type & GOT_TLSDESC_GD)
8130 locals[i].tlsdesc_got_jump_table_offset =
8131 (htab->root.sgotplt->size
8132 - aarch64_compute_jump_table_size (htab));
8133 htab->root.sgotplt->size += GOT_ENTRY_SIZE * 2;
8134 locals[i].got_offset = (bfd_vma) - 2;
8137 if (got_type & GOT_TLS_GD)
8139 locals[i].got_offset = htab->root.sgot->size;
8140 htab->root.sgot->size += GOT_ENTRY_SIZE * 2;
8143 if (got_type & GOT_TLS_IE
8144 || got_type & GOT_NORMAL)
8146 locals[i].got_offset = htab->root.sgot->size;
8147 htab->root.sgot->size += GOT_ENTRY_SIZE;
8150 if (got_type == GOT_UNKNOWN)
8154 if (bfd_link_pic (info))
8156 if (got_type & GOT_TLSDESC_GD)
8158 htab->root.srelplt->size += RELOC_SIZE (htab);
8159 /* Note RELOC_COUNT not incremented here! */
8160 htab->tlsdesc_plt = (bfd_vma) - 1;
8163 if (got_type & GOT_TLS_GD)
8164 htab->root.srelgot->size += RELOC_SIZE (htab) * 2;
8166 if (got_type & GOT_TLS_IE
8167 || got_type & GOT_NORMAL)
8168 htab->root.srelgot->size += RELOC_SIZE (htab);
8173 locals[i].got_refcount = (bfd_vma) - 1;
8179 /* Allocate global sym .plt and .got entries, and space for global
8180 sym dynamic relocs. */
8181 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_dynrelocs,
8184 /* Allocate global ifunc sym .plt and .got entries, and space for global
8185 ifunc sym dynamic relocs. */
8186 elf_link_hash_traverse (&htab->root, elfNN_aarch64_allocate_ifunc_dynrelocs,
8189 /* Allocate .plt and .got entries, and space for local symbols. */
8190 htab_traverse (htab->loc_hash_table,
8191 elfNN_aarch64_allocate_local_dynrelocs,
8194 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
8195 htab_traverse (htab->loc_hash_table,
8196 elfNN_aarch64_allocate_local_ifunc_dynrelocs,
8199 /* For every jump slot reserved in the sgotplt, reloc_count is
8200 incremented. However, when we reserve space for TLS descriptors,
8201 it's not incremented, so in order to compute the space reserved
8202 for them, it suffices to multiply the reloc count by the jump
8205 if (htab->root.srelplt)
8206 htab->sgotplt_jump_table_size = aarch64_compute_jump_table_size (htab);
8208 if (htab->tlsdesc_plt)
8210 if (htab->root.splt->size == 0)
8211 htab->root.splt->size += PLT_ENTRY_SIZE;
8213 htab->tlsdesc_plt = htab->root.splt->size;
8214 htab->root.splt->size += PLT_TLSDESC_ENTRY_SIZE;
8216 /* If we're not using lazy TLS relocations, don't generate the
8217 GOT entry required. */
8218 if (!(info->flags & DF_BIND_NOW))
8220 htab->dt_tlsdesc_got = htab->root.sgot->size;
8221 htab->root.sgot->size += GOT_ENTRY_SIZE;
8225 /* Init mapping symbols information to use later to distingush between
8226 code and data while scanning for errata. */
8227 if (htab->fix_erratum_835769 || htab->fix_erratum_843419)
8228 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
8230 if (!is_aarch64_elf (ibfd))
8232 bfd_elfNN_aarch64_init_maps (ibfd);
8235 /* We now have determined the sizes of the various dynamic sections.
8236 Allocate memory for them. */
8238 for (s = dynobj->sections; s != NULL; s = s->next)
8240 if ((s->flags & SEC_LINKER_CREATED) == 0)
8243 if (s == htab->root.splt
8244 || s == htab->root.sgot
8245 || s == htab->root.sgotplt
8246 || s == htab->root.iplt
8247 || s == htab->root.igotplt || s == htab->sdynbss)
8249 /* Strip this section if we don't need it; see the
8252 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
8254 if (s->size != 0 && s != htab->root.srelplt)
8257 /* We use the reloc_count field as a counter if we need
8258 to copy relocs into the output file. */
8259 if (s != htab->root.srelplt)
8264 /* It's not one of our sections, so don't allocate space. */
8270 /* If we don't need this section, strip it from the
8271 output file. This is mostly to handle .rela.bss and
8272 .rela.plt. We must create both sections in
8273 create_dynamic_sections, because they must be created
8274 before the linker maps input sections to output
8275 sections. The linker does that before
8276 adjust_dynamic_symbol is called, and it is that
8277 function which decides whether anything needs to go
8278 into these sections. */
8280 s->flags |= SEC_EXCLUDE;
8284 if ((s->flags & SEC_HAS_CONTENTS) == 0)
8287 /* Allocate memory for the section contents. We use bfd_zalloc
8288 here in case unused entries are not reclaimed before the
8289 section's contents are written out. This should not happen,
8290 but this way if it does, we get a R_AARCH64_NONE reloc instead
8292 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
8293 if (s->contents == NULL)
8297 if (htab->root.dynamic_sections_created)
8299 /* Add some entries to the .dynamic section. We fill in the
8300 values later, in elfNN_aarch64_finish_dynamic_sections, but we
8301 must add the entries now so that we get the correct size for
8302 the .dynamic section. The DT_DEBUG entry is filled in by the
8303 dynamic linker and used by the debugger. */
8304 #define add_dynamic_entry(TAG, VAL) \
8305 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8307 if (bfd_link_executable (info))
8309 if (!add_dynamic_entry (DT_DEBUG, 0))
8313 if (htab->root.splt->size != 0)
8315 if (!add_dynamic_entry (DT_PLTGOT, 0)
8316 || !add_dynamic_entry (DT_PLTRELSZ, 0)
8317 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
8318 || !add_dynamic_entry (DT_JMPREL, 0))
8321 if (htab->tlsdesc_plt
8322 && (!add_dynamic_entry (DT_TLSDESC_PLT, 0)
8323 || !add_dynamic_entry (DT_TLSDESC_GOT, 0)))
8329 if (!add_dynamic_entry (DT_RELA, 0)
8330 || !add_dynamic_entry (DT_RELASZ, 0)
8331 || !add_dynamic_entry (DT_RELAENT, RELOC_SIZE (htab)))
8334 /* If any dynamic relocs apply to a read-only section,
8335 then we need a DT_TEXTREL entry. */
8336 if ((info->flags & DF_TEXTREL) == 0)
8337 elf_link_hash_traverse (& htab->root, aarch64_readonly_dynrelocs,
8340 if ((info->flags & DF_TEXTREL) != 0)
8342 if (!add_dynamic_entry (DT_TEXTREL, 0))
8347 #undef add_dynamic_entry
8353 elf_aarch64_update_plt_entry (bfd *output_bfd,
8354 bfd_reloc_code_real_type r_type,
8355 bfd_byte *plt_entry, bfd_vma value)
8357 reloc_howto_type *howto = elfNN_aarch64_howto_from_bfd_reloc (r_type);
8359 _bfd_aarch64_elf_put_addend (output_bfd, plt_entry, r_type, howto, value);
8363 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry *h,
8364 struct elf_aarch64_link_hash_table
8365 *htab, bfd *output_bfd,
8366 struct bfd_link_info *info)
8368 bfd_byte *plt_entry;
8371 bfd_vma gotplt_entry_address;
8372 bfd_vma plt_entry_address;
8373 Elf_Internal_Rela rela;
8375 asection *plt, *gotplt, *relplt;
8377 /* When building a static executable, use .iplt, .igot.plt and
8378 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8379 if (htab->root.splt != NULL)
8381 plt = htab->root.splt;
8382 gotplt = htab->root.sgotplt;
8383 relplt = htab->root.srelplt;
8387 plt = htab->root.iplt;
8388 gotplt = htab->root.igotplt;
8389 relplt = htab->root.irelplt;
8392 /* Get the index in the procedure linkage table which
8393 corresponds to this symbol. This is the index of this symbol
8394 in all the symbols for which we are making plt entries. The
8395 first entry in the procedure linkage table is reserved.
8397 Get the offset into the .got table of the entry that
8398 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
8399 bytes. The first three are reserved for the dynamic linker.
8401 For static executables, we don't reserve anything. */
8403 if (plt == htab->root.splt)
8405 plt_index = (h->plt.offset - htab->plt_header_size) / htab->plt_entry_size;
8406 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
8410 plt_index = h->plt.offset / htab->plt_entry_size;
8411 got_offset = plt_index * GOT_ENTRY_SIZE;
8414 plt_entry = plt->contents + h->plt.offset;
8415 plt_entry_address = plt->output_section->vma
8416 + plt->output_offset + h->plt.offset;
8417 gotplt_entry_address = gotplt->output_section->vma +
8418 gotplt->output_offset + got_offset;
8420 /* Copy in the boiler-plate for the PLTn entry. */
8421 memcpy (plt_entry, elfNN_aarch64_small_plt_entry, PLT_SMALL_ENTRY_SIZE);
8423 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8424 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8425 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8427 PG (gotplt_entry_address) -
8428 PG (plt_entry_address));
8430 /* Fill in the lo12 bits for the load from the pltgot. */
8431 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
8433 PG_OFFSET (gotplt_entry_address));
8435 /* Fill in the lo12 bits for the add from the pltgot entry. */
8436 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
8438 PG_OFFSET (gotplt_entry_address));
8440 /* All the GOTPLT Entries are essentially initialized to PLT0. */
8441 bfd_put_NN (output_bfd,
8442 plt->output_section->vma + plt->output_offset,
8443 gotplt->contents + got_offset);
8445 rela.r_offset = gotplt_entry_address;
8447 if (h->dynindx == -1
8448 || ((bfd_link_executable (info)
8449 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
8451 && h->type == STT_GNU_IFUNC))
8453 /* If an STT_GNU_IFUNC symbol is locally defined, generate
8454 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
8455 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (IRELATIVE));
8456 rela.r_addend = (h->root.u.def.value
8457 + h->root.u.def.section->output_section->vma
8458 + h->root.u.def.section->output_offset);
8462 /* Fill in the entry in the .rela.plt section. */
8463 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (JUMP_SLOT));
8467 /* Compute the relocation entry to used based on PLT index and do
8468 not adjust reloc_count. The reloc_count has already been adjusted
8469 to account for this entry. */
8470 loc = relplt->contents + plt_index * RELOC_SIZE (htab);
8471 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8474 /* Size sections even though they're not dynamic. We use it to setup
8475 _TLS_MODULE_BASE_, if needed. */
8478 elfNN_aarch64_always_size_sections (bfd *output_bfd,
8479 struct bfd_link_info *info)
8483 if (bfd_link_relocatable (info))
8486 tls_sec = elf_hash_table (info)->tls_sec;
8490 struct elf_link_hash_entry *tlsbase;
8492 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
8493 "_TLS_MODULE_BASE_", TRUE, TRUE, FALSE);
8497 struct bfd_link_hash_entry *h = NULL;
8498 const struct elf_backend_data *bed =
8499 get_elf_backend_data (output_bfd);
8501 if (!(_bfd_generic_link_add_one_symbol
8502 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
8503 tls_sec, 0, NULL, FALSE, bed->collect, &h)))
8506 tlsbase->type = STT_TLS;
8507 tlsbase = (struct elf_link_hash_entry *) h;
8508 tlsbase->def_regular = 1;
8509 tlsbase->other = STV_HIDDEN;
8510 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
8517 /* Finish up dynamic symbol handling. We set the contents of various
8518 dynamic sections here. */
8520 elfNN_aarch64_finish_dynamic_symbol (bfd *output_bfd,
8521 struct bfd_link_info *info,
8522 struct elf_link_hash_entry *h,
8523 Elf_Internal_Sym *sym)
8525 struct elf_aarch64_link_hash_table *htab;
8526 htab = elf_aarch64_hash_table (info);
8528 if (h->plt.offset != (bfd_vma) - 1)
8530 asection *plt, *gotplt, *relplt;
8532 /* This symbol has an entry in the procedure linkage table. Set
8535 /* When building a static executable, use .iplt, .igot.plt and
8536 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8537 if (htab->root.splt != NULL)
8539 plt = htab->root.splt;
8540 gotplt = htab->root.sgotplt;
8541 relplt = htab->root.srelplt;
8545 plt = htab->root.iplt;
8546 gotplt = htab->root.igotplt;
8547 relplt = htab->root.irelplt;
8550 /* This symbol has an entry in the procedure linkage table. Set
8552 if ((h->dynindx == -1
8553 && !((h->forced_local || bfd_link_executable (info))
8555 && h->type == STT_GNU_IFUNC))
8561 elfNN_aarch64_create_small_pltn_entry (h, htab, output_bfd, info);
8562 if (!h->def_regular)
8564 /* Mark the symbol as undefined, rather than as defined in
8565 the .plt section. */
8566 sym->st_shndx = SHN_UNDEF;
8567 /* If the symbol is weak we need to clear the value.
8568 Otherwise, the PLT entry would provide a definition for
8569 the symbol even if the symbol wasn't defined anywhere,
8570 and so the symbol would never be NULL. Leave the value if
8571 there were any relocations where pointer equality matters
8572 (this is a clue for the dynamic linker, to make function
8573 pointer comparisons work between an application and shared
8575 if (!h->ref_regular_nonweak || !h->pointer_equality_needed)
8580 if (h->got.offset != (bfd_vma) - 1
8581 && elf_aarch64_hash_entry (h)->got_type == GOT_NORMAL)
8583 Elf_Internal_Rela rela;
8586 /* This symbol has an entry in the global offset table. Set it
8588 if (htab->root.sgot == NULL || htab->root.srelgot == NULL)
8591 rela.r_offset = (htab->root.sgot->output_section->vma
8592 + htab->root.sgot->output_offset
8593 + (h->got.offset & ~(bfd_vma) 1));
8596 && h->type == STT_GNU_IFUNC)
8598 if (bfd_link_pic (info))
8600 /* Generate R_AARCH64_GLOB_DAT. */
8607 if (!h->pointer_equality_needed)
8610 /* For non-shared object, we can't use .got.plt, which
8611 contains the real function address if we need pointer
8612 equality. We load the GOT entry with the PLT entry. */
8613 plt = htab->root.splt ? htab->root.splt : htab->root.iplt;
8614 bfd_put_NN (output_bfd, (plt->output_section->vma
8615 + plt->output_offset
8617 htab->root.sgot->contents
8618 + (h->got.offset & ~(bfd_vma) 1));
8622 else if (bfd_link_pic (info) && SYMBOL_REFERENCES_LOCAL (info, h))
8624 if (!h->def_regular)
8627 BFD_ASSERT ((h->got.offset & 1) != 0);
8628 rela.r_info = ELFNN_R_INFO (0, AARCH64_R (RELATIVE));
8629 rela.r_addend = (h->root.u.def.value
8630 + h->root.u.def.section->output_section->vma
8631 + h->root.u.def.section->output_offset);
8636 BFD_ASSERT ((h->got.offset & 1) == 0);
8637 bfd_put_NN (output_bfd, (bfd_vma) 0,
8638 htab->root.sgot->contents + h->got.offset);
8639 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (GLOB_DAT));
8643 loc = htab->root.srelgot->contents;
8644 loc += htab->root.srelgot->reloc_count++ * RELOC_SIZE (htab);
8645 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8650 Elf_Internal_Rela rela;
8653 /* This symbol needs a copy reloc. Set it up. */
8655 if (h->dynindx == -1
8656 || (h->root.type != bfd_link_hash_defined
8657 && h->root.type != bfd_link_hash_defweak)
8658 || htab->srelbss == NULL)
8661 rela.r_offset = (h->root.u.def.value
8662 + h->root.u.def.section->output_section->vma
8663 + h->root.u.def.section->output_offset);
8664 rela.r_info = ELFNN_R_INFO (h->dynindx, AARCH64_R (COPY));
8666 loc = htab->srelbss->contents;
8667 loc += htab->srelbss->reloc_count++ * RELOC_SIZE (htab);
8668 bfd_elfNN_swap_reloca_out (output_bfd, &rela, loc);
8671 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
8672 be NULL for local symbols. */
8674 && (h == elf_hash_table (info)->hdynamic
8675 || h == elf_hash_table (info)->hgot))
8676 sym->st_shndx = SHN_ABS;
8681 /* Finish up local dynamic symbol handling. We set the contents of
8682 various dynamic sections here. */
8685 elfNN_aarch64_finish_local_dynamic_symbol (void **slot, void *inf)
8687 struct elf_link_hash_entry *h
8688 = (struct elf_link_hash_entry *) *slot;
8689 struct bfd_link_info *info
8690 = (struct bfd_link_info *) inf;
8692 return elfNN_aarch64_finish_dynamic_symbol (info->output_bfd,
8697 elfNN_aarch64_init_small_plt0_entry (bfd *output_bfd ATTRIBUTE_UNUSED,
8698 struct elf_aarch64_link_hash_table
8701 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
8702 small and large plts and at the minute just generates
8705 /* PLT0 of the small PLT looks like this in ELF64 -
8706 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
8707 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
8708 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
8710 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
8711 // GOTPLT entry for this.
8713 PLT0 will be slightly different in ELF32 due to different got entry
8716 bfd_vma plt_got_2nd_ent; /* Address of GOT[2]. */
8720 memcpy (htab->root.splt->contents, elfNN_aarch64_small_plt0_entry,
8722 elf_section_data (htab->root.splt->output_section)->this_hdr.sh_entsize =
8725 plt_got_2nd_ent = (htab->root.sgotplt->output_section->vma
8726 + htab->root.sgotplt->output_offset
8727 + GOT_ENTRY_SIZE * 2);
8729 plt_base = htab->root.splt->output_section->vma +
8730 htab->root.splt->output_offset;
8732 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8733 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8734 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8735 htab->root.splt->contents + 4,
8736 PG (plt_got_2nd_ent) - PG (plt_base + 4));
8738 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_LDSTNN_LO12,
8739 htab->root.splt->contents + 8,
8740 PG_OFFSET (plt_got_2nd_ent));
8742 elf_aarch64_update_plt_entry (output_bfd, BFD_RELOC_AARCH64_ADD_LO12,
8743 htab->root.splt->contents + 12,
8744 PG_OFFSET (plt_got_2nd_ent));
8748 elfNN_aarch64_finish_dynamic_sections (bfd *output_bfd,
8749 struct bfd_link_info *info)
8751 struct elf_aarch64_link_hash_table *htab;
8755 htab = elf_aarch64_hash_table (info);
8756 dynobj = htab->root.dynobj;
8757 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
8759 if (htab->root.dynamic_sections_created)
8761 ElfNN_External_Dyn *dyncon, *dynconend;
8763 if (sdyn == NULL || htab->root.sgot == NULL)
8766 dyncon = (ElfNN_External_Dyn *) sdyn->contents;
8767 dynconend = (ElfNN_External_Dyn *) (sdyn->contents + sdyn->size);
8768 for (; dyncon < dynconend; dyncon++)
8770 Elf_Internal_Dyn dyn;
8773 bfd_elfNN_swap_dyn_in (dynobj, dyncon, &dyn);
8781 s = htab->root.sgotplt;
8782 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
8786 dyn.d_un.d_ptr = htab->root.srelplt->output_section->vma;
8790 s = htab->root.srelplt;
8791 dyn.d_un.d_val = s->size;
8795 /* The procedure linkage table relocs (DT_JMPREL) should
8796 not be included in the overall relocs (DT_RELA).
8797 Therefore, we override the DT_RELASZ entry here to
8798 make it not include the JMPREL relocs. Since the
8799 linker script arranges for .rela.plt to follow all
8800 other relocation sections, we don't have to worry
8801 about changing the DT_RELA entry. */
8802 if (htab->root.srelplt != NULL)
8804 s = htab->root.srelplt;
8805 dyn.d_un.d_val -= s->size;
8809 case DT_TLSDESC_PLT:
8810 s = htab->root.splt;
8811 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
8812 + htab->tlsdesc_plt;
8815 case DT_TLSDESC_GOT:
8816 s = htab->root.sgot;
8817 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset
8818 + htab->dt_tlsdesc_got;
8822 bfd_elfNN_swap_dyn_out (output_bfd, &dyn, dyncon);
8827 /* Fill in the special first entry in the procedure linkage table. */
8828 if (htab->root.splt && htab->root.splt->size > 0)
8830 elfNN_aarch64_init_small_plt0_entry (output_bfd, htab);
8832 elf_section_data (htab->root.splt->output_section)->
8833 this_hdr.sh_entsize = htab->plt_entry_size;
8836 if (htab->tlsdesc_plt)
8838 bfd_put_NN (output_bfd, (bfd_vma) 0,
8839 htab->root.sgot->contents + htab->dt_tlsdesc_got);
8841 memcpy (htab->root.splt->contents + htab->tlsdesc_plt,
8842 elfNN_aarch64_tlsdesc_small_plt_entry,
8843 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry));
8846 bfd_vma adrp1_addr =
8847 htab->root.splt->output_section->vma
8848 + htab->root.splt->output_offset + htab->tlsdesc_plt + 4;
8850 bfd_vma adrp2_addr = adrp1_addr + 4;
8853 htab->root.sgot->output_section->vma
8854 + htab->root.sgot->output_offset;
8856 bfd_vma pltgot_addr =
8857 htab->root.sgotplt->output_section->vma
8858 + htab->root.sgotplt->output_offset;
8860 bfd_vma dt_tlsdesc_got = got_addr + htab->dt_tlsdesc_got;
8862 bfd_byte *plt_entry =
8863 htab->root.splt->contents + htab->tlsdesc_plt;
8865 /* adrp x2, DT_TLSDESC_GOT */
8866 elf_aarch64_update_plt_entry (output_bfd,
8867 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8869 (PG (dt_tlsdesc_got)
8870 - PG (adrp1_addr)));
8873 elf_aarch64_update_plt_entry (output_bfd,
8874 BFD_RELOC_AARCH64_ADR_HI21_PCREL,
8877 - PG (adrp2_addr)));
8879 /* ldr x2, [x2, #0] */
8880 elf_aarch64_update_plt_entry (output_bfd,
8881 BFD_RELOC_AARCH64_LDSTNN_LO12,
8883 PG_OFFSET (dt_tlsdesc_got));
8886 elf_aarch64_update_plt_entry (output_bfd,
8887 BFD_RELOC_AARCH64_ADD_LO12,
8889 PG_OFFSET (pltgot_addr));
8894 if (htab->root.sgotplt)
8896 if (bfd_is_abs_section (htab->root.sgotplt->output_section))
8898 (*_bfd_error_handler)
8899 (_("discarded output section: `%A'"), htab->root.sgotplt);
8903 /* Fill in the first three entries in the global offset table. */
8904 if (htab->root.sgotplt->size > 0)
8906 bfd_put_NN (output_bfd, (bfd_vma) 0, htab->root.sgotplt->contents);
8908 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
8909 bfd_put_NN (output_bfd,
8911 htab->root.sgotplt->contents + GOT_ENTRY_SIZE);
8912 bfd_put_NN (output_bfd,
8914 htab->root.sgotplt->contents + GOT_ENTRY_SIZE * 2);
8917 if (htab->root.sgot)
8919 if (htab->root.sgot->size > 0)
8922 sdyn ? sdyn->output_section->vma + sdyn->output_offset : 0;
8923 bfd_put_NN (output_bfd, addr, htab->root.sgot->contents);
8927 elf_section_data (htab->root.sgotplt->output_section)->
8928 this_hdr.sh_entsize = GOT_ENTRY_SIZE;
8931 if (htab->root.sgot && htab->root.sgot->size > 0)
8932 elf_section_data (htab->root.sgot->output_section)->this_hdr.sh_entsize
8935 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
8936 htab_traverse (htab->loc_hash_table,
8937 elfNN_aarch64_finish_local_dynamic_symbol,
8943 /* Return address for Ith PLT stub in section PLT, for relocation REL
8944 or (bfd_vma) -1 if it should not be included. */
8947 elfNN_aarch64_plt_sym_val (bfd_vma i, const asection *plt,
8948 const arelent *rel ATTRIBUTE_UNUSED)
8950 return plt->vma + PLT_ENTRY_SIZE + i * PLT_SMALL_ENTRY_SIZE;
8954 /* We use this so we can override certain functions
8955 (though currently we don't). */
8957 const struct elf_size_info elfNN_aarch64_size_info =
8959 sizeof (ElfNN_External_Ehdr),
8960 sizeof (ElfNN_External_Phdr),
8961 sizeof (ElfNN_External_Shdr),
8962 sizeof (ElfNN_External_Rel),
8963 sizeof (ElfNN_External_Rela),
8964 sizeof (ElfNN_External_Sym),
8965 sizeof (ElfNN_External_Dyn),
8966 sizeof (Elf_External_Note),
8967 4, /* Hash table entry size. */
8968 1, /* Internal relocs per external relocs. */
8969 ARCH_SIZE, /* Arch size. */
8970 LOG_FILE_ALIGN, /* Log_file_align. */
8971 ELFCLASSNN, EV_CURRENT,
8972 bfd_elfNN_write_out_phdrs,
8973 bfd_elfNN_write_shdrs_and_ehdr,
8974 bfd_elfNN_checksum_contents,
8975 bfd_elfNN_write_relocs,
8976 bfd_elfNN_swap_symbol_in,
8977 bfd_elfNN_swap_symbol_out,
8978 bfd_elfNN_slurp_reloc_table,
8979 bfd_elfNN_slurp_symbol_table,
8980 bfd_elfNN_swap_dyn_in,
8981 bfd_elfNN_swap_dyn_out,
8982 bfd_elfNN_swap_reloc_in,
8983 bfd_elfNN_swap_reloc_out,
8984 bfd_elfNN_swap_reloca_in,
8985 bfd_elfNN_swap_reloca_out
8988 #define ELF_ARCH bfd_arch_aarch64
8989 #define ELF_MACHINE_CODE EM_AARCH64
8990 #define ELF_MAXPAGESIZE 0x10000
8991 #define ELF_MINPAGESIZE 0x1000
8992 #define ELF_COMMONPAGESIZE 0x1000
8994 #define bfd_elfNN_close_and_cleanup \
8995 elfNN_aarch64_close_and_cleanup
8997 #define bfd_elfNN_bfd_free_cached_info \
8998 elfNN_aarch64_bfd_free_cached_info
9000 #define bfd_elfNN_bfd_is_target_special_symbol \
9001 elfNN_aarch64_is_target_special_symbol
9003 #define bfd_elfNN_bfd_link_hash_table_create \
9004 elfNN_aarch64_link_hash_table_create
9006 #define bfd_elfNN_bfd_merge_private_bfd_data \
9007 elfNN_aarch64_merge_private_bfd_data
9009 #define bfd_elfNN_bfd_print_private_bfd_data \
9010 elfNN_aarch64_print_private_bfd_data
9012 #define bfd_elfNN_bfd_reloc_type_lookup \
9013 elfNN_aarch64_reloc_type_lookup
9015 #define bfd_elfNN_bfd_reloc_name_lookup \
9016 elfNN_aarch64_reloc_name_lookup
9018 #define bfd_elfNN_bfd_set_private_flags \
9019 elfNN_aarch64_set_private_flags
9021 #define bfd_elfNN_find_inliner_info \
9022 elfNN_aarch64_find_inliner_info
9024 #define bfd_elfNN_find_nearest_line \
9025 elfNN_aarch64_find_nearest_line
9027 #define bfd_elfNN_mkobject \
9028 elfNN_aarch64_mkobject
9030 #define bfd_elfNN_new_section_hook \
9031 elfNN_aarch64_new_section_hook
9033 #define elf_backend_adjust_dynamic_symbol \
9034 elfNN_aarch64_adjust_dynamic_symbol
9036 #define elf_backend_always_size_sections \
9037 elfNN_aarch64_always_size_sections
9039 #define elf_backend_check_relocs \
9040 elfNN_aarch64_check_relocs
9042 #define elf_backend_copy_indirect_symbol \
9043 elfNN_aarch64_copy_indirect_symbol
9045 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
9046 to them in our hash. */
9047 #define elf_backend_create_dynamic_sections \
9048 elfNN_aarch64_create_dynamic_sections
9050 #define elf_backend_init_index_section \
9051 _bfd_elf_init_2_index_sections
9053 #define elf_backend_finish_dynamic_sections \
9054 elfNN_aarch64_finish_dynamic_sections
9056 #define elf_backend_finish_dynamic_symbol \
9057 elfNN_aarch64_finish_dynamic_symbol
9059 #define elf_backend_gc_sweep_hook \
9060 elfNN_aarch64_gc_sweep_hook
9062 #define elf_backend_object_p \
9063 elfNN_aarch64_object_p
9065 #define elf_backend_output_arch_local_syms \
9066 elfNN_aarch64_output_arch_local_syms
9068 #define elf_backend_plt_sym_val \
9069 elfNN_aarch64_plt_sym_val
9071 #define elf_backend_post_process_headers \
9072 elfNN_aarch64_post_process_headers
9074 #define elf_backend_relocate_section \
9075 elfNN_aarch64_relocate_section
9077 #define elf_backend_reloc_type_class \
9078 elfNN_aarch64_reloc_type_class
9080 #define elf_backend_section_from_shdr \
9081 elfNN_aarch64_section_from_shdr
9083 #define elf_backend_size_dynamic_sections \
9084 elfNN_aarch64_size_dynamic_sections
9086 #define elf_backend_size_info \
9087 elfNN_aarch64_size_info
9089 #define elf_backend_write_section \
9090 elfNN_aarch64_write_section
9092 #define elf_backend_can_refcount 1
9093 #define elf_backend_can_gc_sections 1
9094 #define elf_backend_plt_readonly 1
9095 #define elf_backend_want_got_plt 1
9096 #define elf_backend_want_plt_sym 0
9097 #define elf_backend_may_use_rel_p 0
9098 #define elf_backend_may_use_rela_p 1
9099 #define elf_backend_default_use_rela_p 1
9100 #define elf_backend_rela_normal 1
9101 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
9102 #define elf_backend_default_execstack 0
9103 #define elf_backend_extern_protected_data 1
9105 #undef elf_backend_obj_attrs_section
9106 #define elf_backend_obj_attrs_section ".ARM.attributes"
9108 #include "elfNN-target.h"