1 /* AArch64-specific support for NN-bit ELF.
2 Copyright (C) 2009-2018 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
157 #define BFD_RELOC_AARCH64_TLSDESC_LD64_LO12_NC BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
161 #define AARCH64_R(NAME) R_AARCH64_P32_ ## NAME
162 #define AARCH64_R_STR(NAME) "R_AARCH64_P32_" #NAME
163 #define HOWTO64(...) EMPTY_HOWTO (0)
164 #define HOWTO32(...) HOWTO (__VA_ARGS__)
165 #define LOG_FILE_ALIGN 2
166 #define BFD_RELOC_AARCH64_TLSDESC_LD32_LO12 BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
167 #define R_AARCH64_P32_TLSDESC_ADD_LO12 R_AARCH64_P32_TLSDESC_ADD_LO12_NC
170 #define IS_AARCH64_TLS_RELOC(R_TYPE) \
171 ((R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
172 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
173 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
174 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \
175 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \
176 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
177 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC \
178 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC \
179 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
180 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC \
181 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1 \
182 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12 \
183 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12 \
184 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC \
185 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
186 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
187 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21 \
188 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12 \
189 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC \
190 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12 \
191 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC \
192 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12 \
193 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC \
194 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12 \
195 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC \
196 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0 \
197 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC \
198 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1 \
199 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC \
200 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2 \
201 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12 \
202 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12 \
203 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC \
204 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0 \
205 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC \
206 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1 \
207 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC \
208 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2 \
209 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPMOD \
210 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_DTPREL \
211 || (R_TYPE) == BFD_RELOC_AARCH64_TLS_TPREL \
212 || IS_AARCH64_TLSDESC_RELOC ((R_TYPE)))
214 #define IS_AARCH64_TLS_RELAX_RELOC(R_TYPE) \
215 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
216 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \
217 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
218 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
219 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
220 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
221 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC \
222 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
223 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
224 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1 \
225 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
226 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21 \
227 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADR_PREL21 \
228 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC \
229 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC \
230 || (R_TYPE) == BFD_RELOC_AARCH64_TLSGD_MOVW_G1 \
231 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21 \
232 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19 \
233 || (R_TYPE) == BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC \
234 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC \
235 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21 \
236 || (R_TYPE) == BFD_RELOC_AARCH64_TLSLD_ADR_PREL21)
238 #define IS_AARCH64_TLSDESC_RELOC(R_TYPE) \
239 ((R_TYPE) == BFD_RELOC_AARCH64_TLSDESC \
240 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD \
241 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADD_LO12 \
242 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21 \
243 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21 \
244 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_CALL \
245 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC \
246 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD64_LO12 \
247 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LDR \
248 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_LD_PREL19 \
249 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC \
250 || (R_TYPE) == BFD_RELOC_AARCH64_TLSDESC_OFF_G1)
252 #define ELIMINATE_COPY_RELOCS 1
254 /* Return size of a relocation entry. HTAB is the bfd's
255 elf_aarch64_link_hash_entry. */
256 #define RELOC_SIZE(HTAB) (sizeof (ElfNN_External_Rela))
258 /* GOT Entry size - 8 bytes in ELF64 and 4 bytes in ELF32. */
259 #define GOT_ENTRY_SIZE (ARCH_SIZE / 8)
260 #define PLT_ENTRY_SIZE (32)
261 #define PLT_SMALL_ENTRY_SIZE (16)
262 #define PLT_TLSDESC_ENTRY_SIZE (32)
264 /* Encoding of the nop instruction. */
265 #define INSN_NOP 0xd503201f
267 #define aarch64_compute_jump_table_size(htab) \
268 (((htab)->root.srelplt == NULL) ? 0 \
269 : (htab)->root.srelplt->reloc_count * GOT_ENTRY_SIZE)
271 /* The first entry in a procedure linkage table looks like this
272 if the distance between the PLTGOT and the PLT is < 4GB use
273 these PLT entries. Note that the dynamic linker gets &PLTGOT[2]
274 in x16 and needs to work out PLTGOT[1] by using an address of
275 [x16,#-GOT_ENTRY_SIZE]. */
276 static const bfd_byte elfNN_aarch64_small_plt0_entry
[PLT_ENTRY_SIZE
] =
278 0xf0, 0x7b, 0xbf, 0xa9, /* stp x16, x30, [sp, #-16]! */
279 0x10, 0x00, 0x00, 0x90, /* adrp x16, (GOT+16) */
281 0x11, 0x0A, 0x40, 0xf9, /* ldr x17, [x16, #PLT_GOT+0x10] */
282 0x10, 0x42, 0x00, 0x91, /* add x16, x16,#PLT_GOT+0x10 */
284 0x11, 0x0A, 0x40, 0xb9, /* ldr w17, [x16, #PLT_GOT+0x8] */
285 0x10, 0x22, 0x00, 0x11, /* add w16, w16,#PLT_GOT+0x8 */
287 0x20, 0x02, 0x1f, 0xd6, /* br x17 */
288 0x1f, 0x20, 0x03, 0xd5, /* nop */
289 0x1f, 0x20, 0x03, 0xd5, /* nop */
290 0x1f, 0x20, 0x03, 0xd5, /* nop */
293 /* Per function entry in a procedure linkage table looks like this
294 if the distance between the PLTGOT and the PLT is < 4GB use
295 these PLT entries. */
296 static const bfd_byte elfNN_aarch64_small_plt_entry
[PLT_SMALL_ENTRY_SIZE
] =
298 0x10, 0x00, 0x00, 0x90, /* adrp x16, PLTGOT + n * 8 */
300 0x11, 0x02, 0x40, 0xf9, /* ldr x17, [x16, PLTGOT + n * 8] */
301 0x10, 0x02, 0x00, 0x91, /* add x16, x16, :lo12:PLTGOT + n * 8 */
303 0x11, 0x02, 0x40, 0xb9, /* ldr w17, [x16, PLTGOT + n * 4] */
304 0x10, 0x02, 0x00, 0x11, /* add w16, w16, :lo12:PLTGOT + n * 4 */
306 0x20, 0x02, 0x1f, 0xd6, /* br x17. */
309 static const bfd_byte
310 elfNN_aarch64_tlsdesc_small_plt_entry
[PLT_TLSDESC_ENTRY_SIZE
] =
312 0xe2, 0x0f, 0xbf, 0xa9, /* stp x2, x3, [sp, #-16]! */
313 0x02, 0x00, 0x00, 0x90, /* adrp x2, 0 */
314 0x03, 0x00, 0x00, 0x90, /* adrp x3, 0 */
316 0x42, 0x00, 0x40, 0xf9, /* ldr x2, [x2, #0] */
317 0x63, 0x00, 0x00, 0x91, /* add x3, x3, 0 */
319 0x42, 0x00, 0x40, 0xb9, /* ldr w2, [x2, #0] */
320 0x63, 0x00, 0x00, 0x11, /* add w3, w3, 0 */
322 0x40, 0x00, 0x1f, 0xd6, /* br x2 */
323 0x1f, 0x20, 0x03, 0xd5, /* nop */
324 0x1f, 0x20, 0x03, 0xd5, /* nop */
327 #define elf_info_to_howto elfNN_aarch64_info_to_howto
328 #define elf_info_to_howto_rel elfNN_aarch64_info_to_howto
330 #define AARCH64_ELF_ABI_VERSION 0
332 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */
333 #define ALL_ONES (~ (bfd_vma) 0)
335 /* Indexed by the bfd interal reloc enumerators.
336 Therefore, the table needs to be synced with BFD_RELOC_AARCH64_*
339 static reloc_howto_type elfNN_aarch64_howto_table
[] =
343 /* Basic data relocations. */
345 /* Deprecated, but retained for backwards compatibility. */
346 HOWTO64 (R_AARCH64_NULL
, /* type */
348 3, /* size (0 = byte, 1 = short, 2 = long) */
350 FALSE
, /* pc_relative */
352 complain_overflow_dont
, /* complain_on_overflow */
353 bfd_elf_generic_reloc
, /* special_function */
354 "R_AARCH64_NULL", /* name */
355 FALSE
, /* partial_inplace */
358 FALSE
), /* pcrel_offset */
359 HOWTO (R_AARCH64_NONE
, /* type */
361 3, /* size (0 = byte, 1 = short, 2 = long) */
363 FALSE
, /* pc_relative */
365 complain_overflow_dont
, /* complain_on_overflow */
366 bfd_elf_generic_reloc
, /* special_function */
367 "R_AARCH64_NONE", /* name */
368 FALSE
, /* partial_inplace */
371 FALSE
), /* pcrel_offset */
374 HOWTO64 (AARCH64_R (ABS64
), /* type */
376 4, /* size (4 = long long) */
378 FALSE
, /* pc_relative */
380 complain_overflow_unsigned
, /* complain_on_overflow */
381 bfd_elf_generic_reloc
, /* special_function */
382 AARCH64_R_STR (ABS64
), /* name */
383 FALSE
, /* partial_inplace */
384 ALL_ONES
, /* src_mask */
385 ALL_ONES
, /* dst_mask */
386 FALSE
), /* pcrel_offset */
389 HOWTO (AARCH64_R (ABS32
), /* type */
391 2, /* size (0 = byte, 1 = short, 2 = long) */
393 FALSE
, /* pc_relative */
395 complain_overflow_unsigned
, /* complain_on_overflow */
396 bfd_elf_generic_reloc
, /* special_function */
397 AARCH64_R_STR (ABS32
), /* name */
398 FALSE
, /* partial_inplace */
399 0xffffffff, /* src_mask */
400 0xffffffff, /* dst_mask */
401 FALSE
), /* pcrel_offset */
404 HOWTO (AARCH64_R (ABS16
), /* type */
406 1, /* size (0 = byte, 1 = short, 2 = long) */
408 FALSE
, /* pc_relative */
410 complain_overflow_unsigned
, /* complain_on_overflow */
411 bfd_elf_generic_reloc
, /* special_function */
412 AARCH64_R_STR (ABS16
), /* name */
413 FALSE
, /* partial_inplace */
414 0xffff, /* src_mask */
415 0xffff, /* dst_mask */
416 FALSE
), /* pcrel_offset */
418 /* .xword: (S+A-P) */
419 HOWTO64 (AARCH64_R (PREL64
), /* type */
421 4, /* size (4 = long long) */
423 TRUE
, /* pc_relative */
425 complain_overflow_signed
, /* complain_on_overflow */
426 bfd_elf_generic_reloc
, /* special_function */
427 AARCH64_R_STR (PREL64
), /* name */
428 FALSE
, /* partial_inplace */
429 ALL_ONES
, /* src_mask */
430 ALL_ONES
, /* dst_mask */
431 TRUE
), /* pcrel_offset */
434 HOWTO (AARCH64_R (PREL32
), /* type */
436 2, /* size (0 = byte, 1 = short, 2 = long) */
438 TRUE
, /* pc_relative */
440 complain_overflow_signed
, /* complain_on_overflow */
441 bfd_elf_generic_reloc
, /* special_function */
442 AARCH64_R_STR (PREL32
), /* name */
443 FALSE
, /* partial_inplace */
444 0xffffffff, /* src_mask */
445 0xffffffff, /* dst_mask */
446 TRUE
), /* pcrel_offset */
449 HOWTO (AARCH64_R (PREL16
), /* type */
451 1, /* size (0 = byte, 1 = short, 2 = long) */
453 TRUE
, /* pc_relative */
455 complain_overflow_signed
, /* complain_on_overflow */
456 bfd_elf_generic_reloc
, /* special_function */
457 AARCH64_R_STR (PREL16
), /* name */
458 FALSE
, /* partial_inplace */
459 0xffff, /* src_mask */
460 0xffff, /* dst_mask */
461 TRUE
), /* pcrel_offset */
463 /* Group relocations to create a 16, 32, 48 or 64 bit
464 unsigned data or abs address inline. */
466 /* MOVZ: ((S+A) >> 0) & 0xffff */
467 HOWTO (AARCH64_R (MOVW_UABS_G0
), /* type */
469 2, /* size (0 = byte, 1 = short, 2 = long) */
471 FALSE
, /* pc_relative */
473 complain_overflow_unsigned
, /* complain_on_overflow */
474 bfd_elf_generic_reloc
, /* special_function */
475 AARCH64_R_STR (MOVW_UABS_G0
), /* name */
476 FALSE
, /* partial_inplace */
477 0xffff, /* src_mask */
478 0xffff, /* dst_mask */
479 FALSE
), /* pcrel_offset */
481 /* MOVK: ((S+A) >> 0) & 0xffff [no overflow check] */
482 HOWTO (AARCH64_R (MOVW_UABS_G0_NC
), /* type */
484 2, /* size (0 = byte, 1 = short, 2 = long) */
486 FALSE
, /* pc_relative */
488 complain_overflow_dont
, /* complain_on_overflow */
489 bfd_elf_generic_reloc
, /* special_function */
490 AARCH64_R_STR (MOVW_UABS_G0_NC
), /* name */
491 FALSE
, /* partial_inplace */
492 0xffff, /* src_mask */
493 0xffff, /* dst_mask */
494 FALSE
), /* pcrel_offset */
496 /* MOVZ: ((S+A) >> 16) & 0xffff */
497 HOWTO (AARCH64_R (MOVW_UABS_G1
), /* type */
499 2, /* size (0 = byte, 1 = short, 2 = long) */
501 FALSE
, /* pc_relative */
503 complain_overflow_unsigned
, /* complain_on_overflow */
504 bfd_elf_generic_reloc
, /* special_function */
505 AARCH64_R_STR (MOVW_UABS_G1
), /* name */
506 FALSE
, /* partial_inplace */
507 0xffff, /* src_mask */
508 0xffff, /* dst_mask */
509 FALSE
), /* pcrel_offset */
511 /* MOVK: ((S+A) >> 16) & 0xffff [no overflow check] */
512 HOWTO64 (AARCH64_R (MOVW_UABS_G1_NC
), /* type */
514 2, /* size (0 = byte, 1 = short, 2 = long) */
516 FALSE
, /* pc_relative */
518 complain_overflow_dont
, /* complain_on_overflow */
519 bfd_elf_generic_reloc
, /* special_function */
520 AARCH64_R_STR (MOVW_UABS_G1_NC
), /* name */
521 FALSE
, /* partial_inplace */
522 0xffff, /* src_mask */
523 0xffff, /* dst_mask */
524 FALSE
), /* pcrel_offset */
526 /* MOVZ: ((S+A) >> 32) & 0xffff */
527 HOWTO64 (AARCH64_R (MOVW_UABS_G2
), /* type */
529 2, /* size (0 = byte, 1 = short, 2 = long) */
531 FALSE
, /* pc_relative */
533 complain_overflow_unsigned
, /* complain_on_overflow */
534 bfd_elf_generic_reloc
, /* special_function */
535 AARCH64_R_STR (MOVW_UABS_G2
), /* name */
536 FALSE
, /* partial_inplace */
537 0xffff, /* src_mask */
538 0xffff, /* dst_mask */
539 FALSE
), /* pcrel_offset */
541 /* MOVK: ((S+A) >> 32) & 0xffff [no overflow check] */
542 HOWTO64 (AARCH64_R (MOVW_UABS_G2_NC
), /* type */
544 2, /* size (0 = byte, 1 = short, 2 = long) */
546 FALSE
, /* pc_relative */
548 complain_overflow_dont
, /* complain_on_overflow */
549 bfd_elf_generic_reloc
, /* special_function */
550 AARCH64_R_STR (MOVW_UABS_G2_NC
), /* name */
551 FALSE
, /* partial_inplace */
552 0xffff, /* src_mask */
553 0xffff, /* dst_mask */
554 FALSE
), /* pcrel_offset */
556 /* MOVZ: ((S+A) >> 48) & 0xffff */
557 HOWTO64 (AARCH64_R (MOVW_UABS_G3
), /* type */
559 2, /* size (0 = byte, 1 = short, 2 = long) */
561 FALSE
, /* pc_relative */
563 complain_overflow_unsigned
, /* complain_on_overflow */
564 bfd_elf_generic_reloc
, /* special_function */
565 AARCH64_R_STR (MOVW_UABS_G3
), /* name */
566 FALSE
, /* partial_inplace */
567 0xffff, /* src_mask */
568 0xffff, /* dst_mask */
569 FALSE
), /* pcrel_offset */
571 /* Group relocations to create high part of a 16, 32, 48 or 64 bit
572 signed data or abs address inline. Will change instruction
573 to MOVN or MOVZ depending on sign of calculated value. */
575 /* MOV[ZN]: ((S+A) >> 0) & 0xffff */
576 HOWTO (AARCH64_R (MOVW_SABS_G0
), /* type */
578 2, /* size (0 = byte, 1 = short, 2 = long) */
580 FALSE
, /* pc_relative */
582 complain_overflow_signed
, /* complain_on_overflow */
583 bfd_elf_generic_reloc
, /* special_function */
584 AARCH64_R_STR (MOVW_SABS_G0
), /* name */
585 FALSE
, /* partial_inplace */
586 0xffff, /* src_mask */
587 0xffff, /* dst_mask */
588 FALSE
), /* pcrel_offset */
590 /* MOV[ZN]: ((S+A) >> 16) & 0xffff */
591 HOWTO64 (AARCH64_R (MOVW_SABS_G1
), /* type */
593 2, /* size (0 = byte, 1 = short, 2 = long) */
595 FALSE
, /* pc_relative */
597 complain_overflow_signed
, /* complain_on_overflow */
598 bfd_elf_generic_reloc
, /* special_function */
599 AARCH64_R_STR (MOVW_SABS_G1
), /* name */
600 FALSE
, /* partial_inplace */
601 0xffff, /* src_mask */
602 0xffff, /* dst_mask */
603 FALSE
), /* pcrel_offset */
605 /* MOV[ZN]: ((S+A) >> 32) & 0xffff */
606 HOWTO64 (AARCH64_R (MOVW_SABS_G2
), /* type */
608 2, /* size (0 = byte, 1 = short, 2 = long) */
610 FALSE
, /* pc_relative */
612 complain_overflow_signed
, /* complain_on_overflow */
613 bfd_elf_generic_reloc
, /* special_function */
614 AARCH64_R_STR (MOVW_SABS_G2
), /* name */
615 FALSE
, /* partial_inplace */
616 0xffff, /* src_mask */
617 0xffff, /* dst_mask */
618 FALSE
), /* pcrel_offset */
620 /* Group relocations to create a 16, 32, 48 or 64 bit
621 PC relative address inline. */
623 /* MOV[NZ]: ((S+A-P) >> 0) & 0xffff */
624 HOWTO64 (AARCH64_R (MOVW_PREL_G0
), /* type */
626 2, /* size (0 = byte, 1 = short, 2 = long) */
628 TRUE
, /* pc_relative */
630 complain_overflow_signed
, /* complain_on_overflow */
631 bfd_elf_generic_reloc
, /* special_function */
632 AARCH64_R_STR (MOVW_PREL_G0
), /* name */
633 FALSE
, /* partial_inplace */
634 0xffff, /* src_mask */
635 0xffff, /* dst_mask */
636 TRUE
), /* pcrel_offset */
638 /* MOVK: ((S+A-P) >> 0) & 0xffff [no overflow check] */
639 HOWTO64 (AARCH64_R (MOVW_PREL_G0_NC
), /* type */
641 2, /* size (0 = byte, 1 = short, 2 = long) */
643 TRUE
, /* pc_relative */
645 complain_overflow_dont
, /* complain_on_overflow */
646 bfd_elf_generic_reloc
, /* special_function */
647 AARCH64_R_STR (MOVW_PREL_G0_NC
), /* name */
648 FALSE
, /* partial_inplace */
649 0xffff, /* src_mask */
650 0xffff, /* dst_mask */
651 TRUE
), /* pcrel_offset */
653 /* MOV[NZ]: ((S+A-P) >> 16) & 0xffff */
654 HOWTO64 (AARCH64_R (MOVW_PREL_G1
), /* type */
656 2, /* size (0 = byte, 1 = short, 2 = long) */
658 TRUE
, /* pc_relative */
660 complain_overflow_signed
, /* complain_on_overflow */
661 bfd_elf_generic_reloc
, /* special_function */
662 AARCH64_R_STR (MOVW_PREL_G1
), /* name */
663 FALSE
, /* partial_inplace */
664 0xffff, /* src_mask */
665 0xffff, /* dst_mask */
666 TRUE
), /* pcrel_offset */
668 /* MOVK: ((S+A-P) >> 16) & 0xffff [no overflow check] */
669 HOWTO64 (AARCH64_R (MOVW_PREL_G1_NC
), /* type */
671 2, /* size (0 = byte, 1 = short, 2 = long) */
673 TRUE
, /* pc_relative */
675 complain_overflow_dont
, /* complain_on_overflow */
676 bfd_elf_generic_reloc
, /* special_function */
677 AARCH64_R_STR (MOVW_PREL_G1_NC
), /* name */
678 FALSE
, /* partial_inplace */
679 0xffff, /* src_mask */
680 0xffff, /* dst_mask */
681 TRUE
), /* pcrel_offset */
683 /* MOV[NZ]: ((S+A-P) >> 32) & 0xffff */
684 HOWTO64 (AARCH64_R (MOVW_PREL_G2
), /* type */
686 2, /* size (0 = byte, 1 = short, 2 = long) */
688 TRUE
, /* pc_relative */
690 complain_overflow_signed
, /* complain_on_overflow */
691 bfd_elf_generic_reloc
, /* special_function */
692 AARCH64_R_STR (MOVW_PREL_G2
), /* name */
693 FALSE
, /* partial_inplace */
694 0xffff, /* src_mask */
695 0xffff, /* dst_mask */
696 TRUE
), /* pcrel_offset */
698 /* MOVK: ((S+A-P) >> 32) & 0xffff [no overflow check] */
699 HOWTO64 (AARCH64_R (MOVW_PREL_G2_NC
), /* type */
701 2, /* size (0 = byte, 1 = short, 2 = long) */
703 TRUE
, /* pc_relative */
705 complain_overflow_dont
, /* complain_on_overflow */
706 bfd_elf_generic_reloc
, /* special_function */
707 AARCH64_R_STR (MOVW_PREL_G2_NC
), /* name */
708 FALSE
, /* partial_inplace */
709 0xffff, /* src_mask */
710 0xffff, /* dst_mask */
711 TRUE
), /* pcrel_offset */
713 /* MOV[NZ]: ((S+A-P) >> 48) & 0xffff */
714 HOWTO64 (AARCH64_R (MOVW_PREL_G3
), /* type */
716 2, /* size (0 = byte, 1 = short, 2 = long) */
718 TRUE
, /* pc_relative */
720 complain_overflow_dont
, /* complain_on_overflow */
721 bfd_elf_generic_reloc
, /* special_function */
722 AARCH64_R_STR (MOVW_PREL_G3
), /* name */
723 FALSE
, /* partial_inplace */
724 0xffff, /* src_mask */
725 0xffff, /* dst_mask */
726 TRUE
), /* pcrel_offset */
728 /* Relocations to generate 19, 21 and 33 bit PC-relative load/store
729 addresses: PG(x) is (x & ~0xfff). */
731 /* LD-lit: ((S+A-P) >> 2) & 0x7ffff */
732 HOWTO (AARCH64_R (LD_PREL_LO19
), /* type */
734 2, /* size (0 = byte, 1 = short, 2 = long) */
736 TRUE
, /* pc_relative */
738 complain_overflow_signed
, /* complain_on_overflow */
739 bfd_elf_generic_reloc
, /* special_function */
740 AARCH64_R_STR (LD_PREL_LO19
), /* name */
741 FALSE
, /* partial_inplace */
742 0x7ffff, /* src_mask */
743 0x7ffff, /* dst_mask */
744 TRUE
), /* pcrel_offset */
746 /* ADR: (S+A-P) & 0x1fffff */
747 HOWTO (AARCH64_R (ADR_PREL_LO21
), /* type */
749 2, /* size (0 = byte, 1 = short, 2 = long) */
751 TRUE
, /* pc_relative */
753 complain_overflow_signed
, /* complain_on_overflow */
754 bfd_elf_generic_reloc
, /* special_function */
755 AARCH64_R_STR (ADR_PREL_LO21
), /* name */
756 FALSE
, /* partial_inplace */
757 0x1fffff, /* src_mask */
758 0x1fffff, /* dst_mask */
759 TRUE
), /* pcrel_offset */
761 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
762 HOWTO (AARCH64_R (ADR_PREL_PG_HI21
), /* type */
764 2, /* size (0 = byte, 1 = short, 2 = long) */
766 TRUE
, /* pc_relative */
768 complain_overflow_signed
, /* complain_on_overflow */
769 bfd_elf_generic_reloc
, /* special_function */
770 AARCH64_R_STR (ADR_PREL_PG_HI21
), /* name */
771 FALSE
, /* partial_inplace */
772 0x1fffff, /* src_mask */
773 0x1fffff, /* dst_mask */
774 TRUE
), /* pcrel_offset */
776 /* ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff [no overflow check] */
777 HOWTO64 (AARCH64_R (ADR_PREL_PG_HI21_NC
), /* type */
779 2, /* size (0 = byte, 1 = short, 2 = long) */
781 TRUE
, /* pc_relative */
783 complain_overflow_dont
, /* complain_on_overflow */
784 bfd_elf_generic_reloc
, /* special_function */
785 AARCH64_R_STR (ADR_PREL_PG_HI21_NC
), /* name */
786 FALSE
, /* partial_inplace */
787 0x1fffff, /* src_mask */
788 0x1fffff, /* dst_mask */
789 TRUE
), /* pcrel_offset */
791 /* ADD: (S+A) & 0xfff [no overflow check] */
792 HOWTO (AARCH64_R (ADD_ABS_LO12_NC
), /* type */
794 2, /* size (0 = byte, 1 = short, 2 = long) */
796 FALSE
, /* pc_relative */
798 complain_overflow_dont
, /* complain_on_overflow */
799 bfd_elf_generic_reloc
, /* special_function */
800 AARCH64_R_STR (ADD_ABS_LO12_NC
), /* name */
801 FALSE
, /* partial_inplace */
802 0x3ffc00, /* src_mask */
803 0x3ffc00, /* dst_mask */
804 FALSE
), /* pcrel_offset */
806 /* LD/ST8: (S+A) & 0xfff */
807 HOWTO (AARCH64_R (LDST8_ABS_LO12_NC
), /* type */
809 2, /* size (0 = byte, 1 = short, 2 = long) */
811 FALSE
, /* pc_relative */
813 complain_overflow_dont
, /* complain_on_overflow */
814 bfd_elf_generic_reloc
, /* special_function */
815 AARCH64_R_STR (LDST8_ABS_LO12_NC
), /* name */
816 FALSE
, /* partial_inplace */
817 0xfff, /* src_mask */
818 0xfff, /* dst_mask */
819 FALSE
), /* pcrel_offset */
821 /* Relocations for control-flow instructions. */
823 /* TBZ/NZ: ((S+A-P) >> 2) & 0x3fff */
824 HOWTO (AARCH64_R (TSTBR14
), /* type */
826 2, /* size (0 = byte, 1 = short, 2 = long) */
828 TRUE
, /* pc_relative */
830 complain_overflow_signed
, /* complain_on_overflow */
831 bfd_elf_generic_reloc
, /* special_function */
832 AARCH64_R_STR (TSTBR14
), /* name */
833 FALSE
, /* partial_inplace */
834 0x3fff, /* src_mask */
835 0x3fff, /* dst_mask */
836 TRUE
), /* pcrel_offset */
838 /* B.cond: ((S+A-P) >> 2) & 0x7ffff */
839 HOWTO (AARCH64_R (CONDBR19
), /* type */
841 2, /* size (0 = byte, 1 = short, 2 = long) */
843 TRUE
, /* pc_relative */
845 complain_overflow_signed
, /* complain_on_overflow */
846 bfd_elf_generic_reloc
, /* special_function */
847 AARCH64_R_STR (CONDBR19
), /* name */
848 FALSE
, /* partial_inplace */
849 0x7ffff, /* src_mask */
850 0x7ffff, /* dst_mask */
851 TRUE
), /* pcrel_offset */
853 /* B: ((S+A-P) >> 2) & 0x3ffffff */
854 HOWTO (AARCH64_R (JUMP26
), /* type */
856 2, /* size (0 = byte, 1 = short, 2 = long) */
858 TRUE
, /* pc_relative */
860 complain_overflow_signed
, /* complain_on_overflow */
861 bfd_elf_generic_reloc
, /* special_function */
862 AARCH64_R_STR (JUMP26
), /* name */
863 FALSE
, /* partial_inplace */
864 0x3ffffff, /* src_mask */
865 0x3ffffff, /* dst_mask */
866 TRUE
), /* pcrel_offset */
868 /* BL: ((S+A-P) >> 2) & 0x3ffffff */
869 HOWTO (AARCH64_R (CALL26
), /* type */
871 2, /* size (0 = byte, 1 = short, 2 = long) */
873 TRUE
, /* pc_relative */
875 complain_overflow_signed
, /* complain_on_overflow */
876 bfd_elf_generic_reloc
, /* special_function */
877 AARCH64_R_STR (CALL26
), /* name */
878 FALSE
, /* partial_inplace */
879 0x3ffffff, /* src_mask */
880 0x3ffffff, /* dst_mask */
881 TRUE
), /* pcrel_offset */
883 /* LD/ST16: (S+A) & 0xffe */
884 HOWTO (AARCH64_R (LDST16_ABS_LO12_NC
), /* type */
886 2, /* size (0 = byte, 1 = short, 2 = long) */
888 FALSE
, /* pc_relative */
890 complain_overflow_dont
, /* complain_on_overflow */
891 bfd_elf_generic_reloc
, /* special_function */
892 AARCH64_R_STR (LDST16_ABS_LO12_NC
), /* name */
893 FALSE
, /* partial_inplace */
894 0xffe, /* src_mask */
895 0xffe, /* dst_mask */
896 FALSE
), /* pcrel_offset */
898 /* LD/ST32: (S+A) & 0xffc */
899 HOWTO (AARCH64_R (LDST32_ABS_LO12_NC
), /* type */
901 2, /* size (0 = byte, 1 = short, 2 = long) */
903 FALSE
, /* pc_relative */
905 complain_overflow_dont
, /* complain_on_overflow */
906 bfd_elf_generic_reloc
, /* special_function */
907 AARCH64_R_STR (LDST32_ABS_LO12_NC
), /* name */
908 FALSE
, /* partial_inplace */
909 0xffc, /* src_mask */
910 0xffc, /* dst_mask */
911 FALSE
), /* pcrel_offset */
913 /* LD/ST64: (S+A) & 0xff8 */
914 HOWTO (AARCH64_R (LDST64_ABS_LO12_NC
), /* type */
916 2, /* size (0 = byte, 1 = short, 2 = long) */
918 FALSE
, /* pc_relative */
920 complain_overflow_dont
, /* complain_on_overflow */
921 bfd_elf_generic_reloc
, /* special_function */
922 AARCH64_R_STR (LDST64_ABS_LO12_NC
), /* name */
923 FALSE
, /* partial_inplace */
924 0xff8, /* src_mask */
925 0xff8, /* dst_mask */
926 FALSE
), /* pcrel_offset */
928 /* LD/ST128: (S+A) & 0xff0 */
929 HOWTO (AARCH64_R (LDST128_ABS_LO12_NC
), /* type */
931 2, /* size (0 = byte, 1 = short, 2 = long) */
933 FALSE
, /* pc_relative */
935 complain_overflow_dont
, /* complain_on_overflow */
936 bfd_elf_generic_reloc
, /* special_function */
937 AARCH64_R_STR (LDST128_ABS_LO12_NC
), /* name */
938 FALSE
, /* partial_inplace */
939 0xff0, /* src_mask */
940 0xff0, /* dst_mask */
941 FALSE
), /* pcrel_offset */
943 /* Set a load-literal immediate field to bits
944 0x1FFFFC of G(S)-P */
945 HOWTO (AARCH64_R (GOT_LD_PREL19
), /* type */
947 2, /* size (0 = byte,1 = short,2 = long) */
949 TRUE
, /* pc_relative */
951 complain_overflow_signed
, /* complain_on_overflow */
952 bfd_elf_generic_reloc
, /* special_function */
953 AARCH64_R_STR (GOT_LD_PREL19
), /* name */
954 FALSE
, /* partial_inplace */
955 0xffffe0, /* src_mask */
956 0xffffe0, /* dst_mask */
957 TRUE
), /* pcrel_offset */
959 /* Get to the page for the GOT entry for the symbol
960 (G(S) - P) using an ADRP instruction. */
961 HOWTO (AARCH64_R (ADR_GOT_PAGE
), /* type */
963 2, /* size (0 = byte, 1 = short, 2 = long) */
965 TRUE
, /* pc_relative */
967 complain_overflow_dont
, /* complain_on_overflow */
968 bfd_elf_generic_reloc
, /* special_function */
969 AARCH64_R_STR (ADR_GOT_PAGE
), /* name */
970 FALSE
, /* partial_inplace */
971 0x1fffff, /* src_mask */
972 0x1fffff, /* dst_mask */
973 TRUE
), /* pcrel_offset */
975 /* LD64: GOT offset G(S) & 0xff8 */
976 HOWTO64 (AARCH64_R (LD64_GOT_LO12_NC
), /* type */
978 2, /* size (0 = byte, 1 = short, 2 = long) */
980 FALSE
, /* pc_relative */
982 complain_overflow_dont
, /* complain_on_overflow */
983 bfd_elf_generic_reloc
, /* special_function */
984 AARCH64_R_STR (LD64_GOT_LO12_NC
), /* name */
985 FALSE
, /* partial_inplace */
986 0xff8, /* src_mask */
987 0xff8, /* dst_mask */
988 FALSE
), /* pcrel_offset */
990 /* LD32: GOT offset G(S) & 0xffc */
991 HOWTO32 (AARCH64_R (LD32_GOT_LO12_NC
), /* type */
993 2, /* size (0 = byte, 1 = short, 2 = long) */
995 FALSE
, /* pc_relative */
997 complain_overflow_dont
, /* complain_on_overflow */
998 bfd_elf_generic_reloc
, /* special_function */
999 AARCH64_R_STR (LD32_GOT_LO12_NC
), /* name */
1000 FALSE
, /* partial_inplace */
1001 0xffc, /* src_mask */
1002 0xffc, /* dst_mask */
1003 FALSE
), /* pcrel_offset */
1005 /* Lower 16 bits of GOT offset for the symbol. */
1006 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G0_NC
), /* type */
1008 2, /* size (0 = byte, 1 = short, 2 = long) */
1010 FALSE
, /* pc_relative */
1012 complain_overflow_dont
, /* complain_on_overflow */
1013 bfd_elf_generic_reloc
, /* special_function */
1014 AARCH64_R_STR (MOVW_GOTOFF_G0_NC
), /* name */
1015 FALSE
, /* partial_inplace */
1016 0xffff, /* src_mask */
1017 0xffff, /* dst_mask */
1018 FALSE
), /* pcrel_offset */
1020 /* Higher 16 bits of GOT offset for the symbol. */
1021 HOWTO64 (AARCH64_R (MOVW_GOTOFF_G1
), /* type */
1022 16, /* rightshift */
1023 2, /* size (0 = byte, 1 = short, 2 = long) */
1025 FALSE
, /* pc_relative */
1027 complain_overflow_unsigned
, /* complain_on_overflow */
1028 bfd_elf_generic_reloc
, /* special_function */
1029 AARCH64_R_STR (MOVW_GOTOFF_G1
), /* name */
1030 FALSE
, /* partial_inplace */
1031 0xffff, /* src_mask */
1032 0xffff, /* dst_mask */
1033 FALSE
), /* pcrel_offset */
1035 /* LD64: GOT offset for the symbol. */
1036 HOWTO64 (AARCH64_R (LD64_GOTOFF_LO15
), /* type */
1038 2, /* size (0 = byte, 1 = short, 2 = long) */
1040 FALSE
, /* pc_relative */
1042 complain_overflow_unsigned
, /* complain_on_overflow */
1043 bfd_elf_generic_reloc
, /* special_function */
1044 AARCH64_R_STR (LD64_GOTOFF_LO15
), /* name */
1045 FALSE
, /* partial_inplace */
1046 0x7ff8, /* src_mask */
1047 0x7ff8, /* dst_mask */
1048 FALSE
), /* pcrel_offset */
1050 /* LD32: GOT offset to the page address of GOT table.
1051 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x5ffc. */
1052 HOWTO32 (AARCH64_R (LD32_GOTPAGE_LO14
), /* type */
1054 2, /* size (0 = byte, 1 = short, 2 = long) */
1056 FALSE
, /* pc_relative */
1058 complain_overflow_unsigned
, /* complain_on_overflow */
1059 bfd_elf_generic_reloc
, /* special_function */
1060 AARCH64_R_STR (LD32_GOTPAGE_LO14
), /* name */
1061 FALSE
, /* partial_inplace */
1062 0x5ffc, /* src_mask */
1063 0x5ffc, /* dst_mask */
1064 FALSE
), /* pcrel_offset */
1066 /* LD64: GOT offset to the page address of GOT table.
1067 (G(S) - PAGE (_GLOBAL_OFFSET_TABLE_)) & 0x7ff8. */
1068 HOWTO64 (AARCH64_R (LD64_GOTPAGE_LO15
), /* type */
1070 2, /* size (0 = byte, 1 = short, 2 = long) */
1072 FALSE
, /* pc_relative */
1074 complain_overflow_unsigned
, /* complain_on_overflow */
1075 bfd_elf_generic_reloc
, /* special_function */
1076 AARCH64_R_STR (LD64_GOTPAGE_LO15
), /* name */
1077 FALSE
, /* partial_inplace */
1078 0x7ff8, /* src_mask */
1079 0x7ff8, /* dst_mask */
1080 FALSE
), /* pcrel_offset */
1082 /* Get to the page for the GOT entry for the symbol
1083 (G(S) - P) using an ADRP instruction. */
1084 HOWTO (AARCH64_R (TLSGD_ADR_PAGE21
), /* type */
1085 12, /* rightshift */
1086 2, /* size (0 = byte, 1 = short, 2 = long) */
1088 TRUE
, /* pc_relative */
1090 complain_overflow_dont
, /* complain_on_overflow */
1091 bfd_elf_generic_reloc
, /* special_function */
1092 AARCH64_R_STR (TLSGD_ADR_PAGE21
), /* name */
1093 FALSE
, /* partial_inplace */
1094 0x1fffff, /* src_mask */
1095 0x1fffff, /* dst_mask */
1096 TRUE
), /* pcrel_offset */
1098 HOWTO (AARCH64_R (TLSGD_ADR_PREL21
), /* type */
1100 2, /* size (0 = byte, 1 = short, 2 = long) */
1102 TRUE
, /* pc_relative */
1104 complain_overflow_dont
, /* complain_on_overflow */
1105 bfd_elf_generic_reloc
, /* special_function */
1106 AARCH64_R_STR (TLSGD_ADR_PREL21
), /* name */
1107 FALSE
, /* partial_inplace */
1108 0x1fffff, /* src_mask */
1109 0x1fffff, /* dst_mask */
1110 TRUE
), /* pcrel_offset */
1112 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1113 HOWTO (AARCH64_R (TLSGD_ADD_LO12_NC
), /* type */
1115 2, /* size (0 = byte, 1 = short, 2 = long) */
1117 FALSE
, /* pc_relative */
1119 complain_overflow_dont
, /* complain_on_overflow */
1120 bfd_elf_generic_reloc
, /* special_function */
1121 AARCH64_R_STR (TLSGD_ADD_LO12_NC
), /* name */
1122 FALSE
, /* partial_inplace */
1123 0xfff, /* src_mask */
1124 0xfff, /* dst_mask */
1125 FALSE
), /* pcrel_offset */
1127 /* Lower 16 bits of GOT offset to tls_index. */
1128 HOWTO64 (AARCH64_R (TLSGD_MOVW_G0_NC
), /* type */
1130 2, /* size (0 = byte, 1 = short, 2 = long) */
1132 FALSE
, /* pc_relative */
1134 complain_overflow_dont
, /* complain_on_overflow */
1135 bfd_elf_generic_reloc
, /* special_function */
1136 AARCH64_R_STR (TLSGD_MOVW_G0_NC
), /* name */
1137 FALSE
, /* partial_inplace */
1138 0xffff, /* src_mask */
1139 0xffff, /* dst_mask */
1140 FALSE
), /* pcrel_offset */
1142 /* Higher 16 bits of GOT offset to tls_index. */
1143 HOWTO64 (AARCH64_R (TLSGD_MOVW_G1
), /* type */
1144 16, /* rightshift */
1145 2, /* size (0 = byte, 1 = short, 2 = long) */
1147 FALSE
, /* pc_relative */
1149 complain_overflow_unsigned
, /* complain_on_overflow */
1150 bfd_elf_generic_reloc
, /* special_function */
1151 AARCH64_R_STR (TLSGD_MOVW_G1
), /* name */
1152 FALSE
, /* partial_inplace */
1153 0xffff, /* src_mask */
1154 0xffff, /* dst_mask */
1155 FALSE
), /* pcrel_offset */
1157 HOWTO (AARCH64_R (TLSIE_ADR_GOTTPREL_PAGE21
), /* type */
1158 12, /* rightshift */
1159 2, /* size (0 = byte, 1 = short, 2 = long) */
1161 FALSE
, /* pc_relative */
1163 complain_overflow_dont
, /* complain_on_overflow */
1164 bfd_elf_generic_reloc
, /* special_function */
1165 AARCH64_R_STR (TLSIE_ADR_GOTTPREL_PAGE21
), /* name */
1166 FALSE
, /* partial_inplace */
1167 0x1fffff, /* src_mask */
1168 0x1fffff, /* dst_mask */
1169 FALSE
), /* pcrel_offset */
1171 HOWTO64 (AARCH64_R (TLSIE_LD64_GOTTPREL_LO12_NC
), /* type */
1173 2, /* size (0 = byte, 1 = short, 2 = long) */
1175 FALSE
, /* pc_relative */
1177 complain_overflow_dont
, /* complain_on_overflow */
1178 bfd_elf_generic_reloc
, /* special_function */
1179 AARCH64_R_STR (TLSIE_LD64_GOTTPREL_LO12_NC
), /* name */
1180 FALSE
, /* partial_inplace */
1181 0xff8, /* src_mask */
1182 0xff8, /* dst_mask */
1183 FALSE
), /* pcrel_offset */
1185 HOWTO32 (AARCH64_R (TLSIE_LD32_GOTTPREL_LO12_NC
), /* type */
1187 2, /* size (0 = byte, 1 = short, 2 = long) */
1189 FALSE
, /* pc_relative */
1191 complain_overflow_dont
, /* complain_on_overflow */
1192 bfd_elf_generic_reloc
, /* special_function */
1193 AARCH64_R_STR (TLSIE_LD32_GOTTPREL_LO12_NC
), /* name */
1194 FALSE
, /* partial_inplace */
1195 0xffc, /* src_mask */
1196 0xffc, /* dst_mask */
1197 FALSE
), /* pcrel_offset */
1199 HOWTO (AARCH64_R (TLSIE_LD_GOTTPREL_PREL19
), /* 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 (TLSIE_LD_GOTTPREL_PREL19
), /* name */
1208 FALSE
, /* partial_inplace */
1209 0x1ffffc, /* src_mask */
1210 0x1ffffc, /* dst_mask */
1211 FALSE
), /* pcrel_offset */
1213 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G0_NC
), /* type */
1215 2, /* size (0 = byte, 1 = short, 2 = long) */
1217 FALSE
, /* pc_relative */
1219 complain_overflow_dont
, /* complain_on_overflow */
1220 bfd_elf_generic_reloc
, /* special_function */
1221 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G0_NC
), /* name */
1222 FALSE
, /* partial_inplace */
1223 0xffff, /* src_mask */
1224 0xffff, /* dst_mask */
1225 FALSE
), /* pcrel_offset */
1227 HOWTO64 (AARCH64_R (TLSIE_MOVW_GOTTPREL_G1
), /* type */
1228 16, /* rightshift */
1229 2, /* size (0 = byte, 1 = short, 2 = long) */
1231 FALSE
, /* pc_relative */
1233 complain_overflow_unsigned
, /* complain_on_overflow */
1234 bfd_elf_generic_reloc
, /* special_function */
1235 AARCH64_R_STR (TLSIE_MOVW_GOTTPREL_G1
), /* name */
1236 FALSE
, /* partial_inplace */
1237 0xffff, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE
), /* pcrel_offset */
1241 /* ADD: bit[23:12] of byte offset to module TLS base address. */
1242 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_HI12
), /* type */
1243 12, /* rightshift */
1244 2, /* size (0 = byte, 1 = short, 2 = long) */
1246 FALSE
, /* pc_relative */
1248 complain_overflow_unsigned
, /* complain_on_overflow */
1249 bfd_elf_generic_reloc
, /* special_function */
1250 AARCH64_R_STR (TLSLD_ADD_DTPREL_HI12
), /* name */
1251 FALSE
, /* partial_inplace */
1252 0xfff, /* src_mask */
1253 0xfff, /* dst_mask */
1254 FALSE
), /* pcrel_offset */
1256 /* Unsigned 12 bit byte offset to module TLS base address. */
1257 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12
), /* type */
1259 2, /* size (0 = byte, 1 = short, 2 = long) */
1261 FALSE
, /* pc_relative */
1263 complain_overflow_unsigned
, /* complain_on_overflow */
1264 bfd_elf_generic_reloc
, /* special_function */
1265 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12
), /* name */
1266 FALSE
, /* partial_inplace */
1267 0xfff, /* src_mask */
1268 0xfff, /* dst_mask */
1269 FALSE
), /* pcrel_offset */
1271 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12. */
1272 HOWTO (AARCH64_R (TLSLD_ADD_DTPREL_LO12_NC
), /* type */
1274 2, /* size (0 = byte, 1 = short, 2 = long) */
1276 FALSE
, /* pc_relative */
1278 complain_overflow_dont
, /* complain_on_overflow */
1279 bfd_elf_generic_reloc
, /* special_function */
1280 AARCH64_R_STR (TLSLD_ADD_DTPREL_LO12_NC
), /* name */
1281 FALSE
, /* partial_inplace */
1282 0xfff, /* src_mask */
1283 0xfff, /* dst_mask */
1284 FALSE
), /* pcrel_offset */
1286 /* ADD: GOT offset G(S) & 0xff8 [no overflow check] */
1287 HOWTO (AARCH64_R (TLSLD_ADD_LO12_NC
), /* type */
1289 2, /* size (0 = byte, 1 = short, 2 = long) */
1291 FALSE
, /* pc_relative */
1293 complain_overflow_dont
, /* complain_on_overflow */
1294 bfd_elf_generic_reloc
, /* special_function */
1295 AARCH64_R_STR (TLSLD_ADD_LO12_NC
), /* name */
1296 FALSE
, /* partial_inplace */
1297 0xfff, /* src_mask */
1298 0xfff, /* dst_mask */
1299 FALSE
), /* pcrel_offset */
1301 /* Get to the page for the GOT entry for the symbol
1302 (G(S) - P) using an ADRP instruction. */
1303 HOWTO (AARCH64_R (TLSLD_ADR_PAGE21
), /* type */
1304 12, /* rightshift */
1305 2, /* size (0 = byte, 1 = short, 2 = long) */
1307 TRUE
, /* pc_relative */
1309 complain_overflow_signed
, /* complain_on_overflow */
1310 bfd_elf_generic_reloc
, /* special_function */
1311 AARCH64_R_STR (TLSLD_ADR_PAGE21
), /* name */
1312 FALSE
, /* partial_inplace */
1313 0x1fffff, /* src_mask */
1314 0x1fffff, /* dst_mask */
1315 TRUE
), /* pcrel_offset */
1317 HOWTO (AARCH64_R (TLSLD_ADR_PREL21
), /* type */
1319 2, /* size (0 = byte, 1 = short, 2 = long) */
1321 TRUE
, /* pc_relative */
1323 complain_overflow_signed
, /* complain_on_overflow */
1324 bfd_elf_generic_reloc
, /* special_function */
1325 AARCH64_R_STR (TLSLD_ADR_PREL21
), /* name */
1326 FALSE
, /* partial_inplace */
1327 0x1fffff, /* src_mask */
1328 0x1fffff, /* dst_mask */
1329 TRUE
), /* pcrel_offset */
1331 /* LD/ST16: bit[11:1] of byte offset to module TLS base address. */
1332 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12
), /* type */
1334 2, /* size (0 = byte, 1 = short, 2 = long) */
1336 FALSE
, /* pc_relative */
1338 complain_overflow_unsigned
, /* complain_on_overflow */
1339 bfd_elf_generic_reloc
, /* special_function */
1340 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12
), /* name */
1341 FALSE
, /* partial_inplace */
1342 0x1ffc00, /* src_mask */
1343 0x1ffc00, /* dst_mask */
1344 FALSE
), /* pcrel_offset */
1346 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12, but no overflow check. */
1347 HOWTO64 (AARCH64_R (TLSLD_LDST16_DTPREL_LO12_NC
), /* type */
1349 2, /* size (0 = byte, 1 = short, 2 = long) */
1351 FALSE
, /* pc_relative */
1353 complain_overflow_dont
, /* complain_on_overflow */
1354 bfd_elf_generic_reloc
, /* special_function */
1355 AARCH64_R_STR (TLSLD_LDST16_DTPREL_LO12_NC
), /* name */
1356 FALSE
, /* partial_inplace */
1357 0x1ffc00, /* src_mask */
1358 0x1ffc00, /* dst_mask */
1359 FALSE
), /* pcrel_offset */
1361 /* LD/ST32: bit[11:2] of byte offset to module TLS base address. */
1362 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12
), /* type */
1364 2, /* size (0 = byte, 1 = short, 2 = long) */
1366 FALSE
, /* pc_relative */
1368 complain_overflow_unsigned
, /* complain_on_overflow */
1369 bfd_elf_generic_reloc
, /* special_function */
1370 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12
), /* name */
1371 FALSE
, /* partial_inplace */
1372 0x3ffc00, /* src_mask */
1373 0x3ffc00, /* dst_mask */
1374 FALSE
), /* pcrel_offset */
1376 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12, but no overflow check. */
1377 HOWTO64 (AARCH64_R (TLSLD_LDST32_DTPREL_LO12_NC
), /* type */
1379 2, /* size (0 = byte, 1 = short, 2 = long) */
1381 FALSE
, /* pc_relative */
1383 complain_overflow_dont
, /* complain_on_overflow */
1384 bfd_elf_generic_reloc
, /* special_function */
1385 AARCH64_R_STR (TLSLD_LDST32_DTPREL_LO12_NC
), /* name */
1386 FALSE
, /* partial_inplace */
1387 0xffc00, /* src_mask */
1388 0xffc00, /* dst_mask */
1389 FALSE
), /* pcrel_offset */
1391 /* LD/ST64: bit[11:3] of byte offset to module TLS base address. */
1392 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12
), /* type */
1394 2, /* size (0 = byte, 1 = short, 2 = long) */
1396 FALSE
, /* pc_relative */
1398 complain_overflow_unsigned
, /* complain_on_overflow */
1399 bfd_elf_generic_reloc
, /* special_function */
1400 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12
), /* name */
1401 FALSE
, /* partial_inplace */
1402 0x3ffc00, /* src_mask */
1403 0x3ffc00, /* dst_mask */
1404 FALSE
), /* pcrel_offset */
1406 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12, but no overflow check. */
1407 HOWTO64 (AARCH64_R (TLSLD_LDST64_DTPREL_LO12_NC
), /* type */
1409 2, /* size (0 = byte, 1 = short, 2 = long) */
1411 FALSE
, /* pc_relative */
1413 complain_overflow_dont
, /* complain_on_overflow */
1414 bfd_elf_generic_reloc
, /* special_function */
1415 AARCH64_R_STR (TLSLD_LDST64_DTPREL_LO12_NC
), /* name */
1416 FALSE
, /* partial_inplace */
1417 0x7fc00, /* src_mask */
1418 0x7fc00, /* dst_mask */
1419 FALSE
), /* pcrel_offset */
1421 /* LD/ST8: bit[11:0] of byte offset to module TLS base address. */
1422 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12
), /* type */
1424 2, /* size (0 = byte, 1 = short, 2 = long) */
1426 FALSE
, /* pc_relative */
1428 complain_overflow_unsigned
, /* complain_on_overflow */
1429 bfd_elf_generic_reloc
, /* special_function */
1430 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12
), /* name */
1431 FALSE
, /* partial_inplace */
1432 0x3ffc00, /* src_mask */
1433 0x3ffc00, /* dst_mask */
1434 FALSE
), /* pcrel_offset */
1436 /* Same as BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12, but no overflow check. */
1437 HOWTO64 (AARCH64_R (TLSLD_LDST8_DTPREL_LO12_NC
), /* type */
1439 2, /* size (0 = byte, 1 = short, 2 = long) */
1441 FALSE
, /* pc_relative */
1443 complain_overflow_dont
, /* complain_on_overflow */
1444 bfd_elf_generic_reloc
, /* special_function */
1445 AARCH64_R_STR (TLSLD_LDST8_DTPREL_LO12_NC
), /* name */
1446 FALSE
, /* partial_inplace */
1447 0x3ffc00, /* src_mask */
1448 0x3ffc00, /* dst_mask */
1449 FALSE
), /* pcrel_offset */
1451 /* MOVZ: bit[15:0] of byte offset to module TLS base address. */
1452 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0
), /* type */
1454 2, /* size (0 = byte, 1 = short, 2 = long) */
1456 FALSE
, /* pc_relative */
1458 complain_overflow_unsigned
, /* complain_on_overflow */
1459 bfd_elf_generic_reloc
, /* special_function */
1460 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0
), /* name */
1461 FALSE
, /* partial_inplace */
1462 0xffff, /* src_mask */
1463 0xffff, /* dst_mask */
1464 FALSE
), /* pcrel_offset */
1466 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0. */
1467 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G0_NC
), /* type */
1469 2, /* size (0 = byte, 1 = short, 2 = long) */
1471 FALSE
, /* pc_relative */
1473 complain_overflow_dont
, /* complain_on_overflow */
1474 bfd_elf_generic_reloc
, /* special_function */
1475 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G0_NC
), /* name */
1476 FALSE
, /* partial_inplace */
1477 0xffff, /* src_mask */
1478 0xffff, /* dst_mask */
1479 FALSE
), /* pcrel_offset */
1481 /* MOVZ: bit[31:16] of byte offset to module TLS base address. */
1482 HOWTO (AARCH64_R (TLSLD_MOVW_DTPREL_G1
), /* type */
1483 16, /* rightshift */
1484 2, /* size (0 = byte, 1 = short, 2 = long) */
1486 FALSE
, /* pc_relative */
1488 complain_overflow_unsigned
, /* complain_on_overflow */
1489 bfd_elf_generic_reloc
, /* special_function */
1490 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1
), /* name */
1491 FALSE
, /* partial_inplace */
1492 0xffff, /* src_mask */
1493 0xffff, /* dst_mask */
1494 FALSE
), /* pcrel_offset */
1496 /* No overflow check version of BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1. */
1497 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G1_NC
), /* type */
1498 16, /* rightshift */
1499 2, /* size (0 = byte, 1 = short, 2 = long) */
1501 FALSE
, /* pc_relative */
1503 complain_overflow_dont
, /* complain_on_overflow */
1504 bfd_elf_generic_reloc
, /* special_function */
1505 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G1_NC
), /* name */
1506 FALSE
, /* partial_inplace */
1507 0xffff, /* src_mask */
1508 0xffff, /* dst_mask */
1509 FALSE
), /* pcrel_offset */
1511 /* MOVZ: bit[47:32] of byte offset to module TLS base address. */
1512 HOWTO64 (AARCH64_R (TLSLD_MOVW_DTPREL_G2
), /* type */
1513 32, /* rightshift */
1514 2, /* size (0 = byte, 1 = short, 2 = long) */
1516 FALSE
, /* pc_relative */
1518 complain_overflow_unsigned
, /* complain_on_overflow */
1519 bfd_elf_generic_reloc
, /* special_function */
1520 AARCH64_R_STR (TLSLD_MOVW_DTPREL_G2
), /* name */
1521 FALSE
, /* partial_inplace */
1522 0xffff, /* src_mask */
1523 0xffff, /* dst_mask */
1524 FALSE
), /* pcrel_offset */
1526 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G2
), /* type */
1527 32, /* rightshift */
1528 2, /* size (0 = byte, 1 = short, 2 = long) */
1530 FALSE
, /* pc_relative */
1532 complain_overflow_unsigned
, /* complain_on_overflow */
1533 bfd_elf_generic_reloc
, /* special_function */
1534 AARCH64_R_STR (TLSLE_MOVW_TPREL_G2
), /* name */
1535 FALSE
, /* partial_inplace */
1536 0xffff, /* src_mask */
1537 0xffff, /* dst_mask */
1538 FALSE
), /* pcrel_offset */
1540 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G1
), /* type */
1541 16, /* rightshift */
1542 2, /* size (0 = byte, 1 = short, 2 = long) */
1544 FALSE
, /* pc_relative */
1546 complain_overflow_dont
, /* complain_on_overflow */
1547 bfd_elf_generic_reloc
, /* special_function */
1548 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1
), /* name */
1549 FALSE
, /* partial_inplace */
1550 0xffff, /* src_mask */
1551 0xffff, /* dst_mask */
1552 FALSE
), /* pcrel_offset */
1554 HOWTO64 (AARCH64_R (TLSLE_MOVW_TPREL_G1_NC
), /* type */
1555 16, /* rightshift */
1556 2, /* size (0 = byte, 1 = short, 2 = long) */
1558 FALSE
, /* pc_relative */
1560 complain_overflow_dont
, /* complain_on_overflow */
1561 bfd_elf_generic_reloc
, /* special_function */
1562 AARCH64_R_STR (TLSLE_MOVW_TPREL_G1_NC
), /* name */
1563 FALSE
, /* partial_inplace */
1564 0xffff, /* src_mask */
1565 0xffff, /* dst_mask */
1566 FALSE
), /* pcrel_offset */
1568 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0
), /* type */
1570 2, /* size (0 = byte, 1 = short, 2 = long) */
1572 FALSE
, /* pc_relative */
1574 complain_overflow_dont
, /* complain_on_overflow */
1575 bfd_elf_generic_reloc
, /* special_function */
1576 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0
), /* name */
1577 FALSE
, /* partial_inplace */
1578 0xffff, /* src_mask */
1579 0xffff, /* dst_mask */
1580 FALSE
), /* pcrel_offset */
1582 HOWTO (AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
), /* type */
1584 2, /* size (0 = byte, 1 = short, 2 = long) */
1586 FALSE
, /* pc_relative */
1588 complain_overflow_dont
, /* complain_on_overflow */
1589 bfd_elf_generic_reloc
, /* special_function */
1590 AARCH64_R_STR (TLSLE_MOVW_TPREL_G0_NC
), /* name */
1591 FALSE
, /* partial_inplace */
1592 0xffff, /* src_mask */
1593 0xffff, /* dst_mask */
1594 FALSE
), /* pcrel_offset */
1596 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_HI12
), /* type */
1597 12, /* rightshift */
1598 2, /* size (0 = byte, 1 = short, 2 = long) */
1600 FALSE
, /* pc_relative */
1602 complain_overflow_unsigned
, /* complain_on_overflow */
1603 bfd_elf_generic_reloc
, /* special_function */
1604 AARCH64_R_STR (TLSLE_ADD_TPREL_HI12
), /* name */
1605 FALSE
, /* partial_inplace */
1606 0xfff, /* src_mask */
1607 0xfff, /* dst_mask */
1608 FALSE
), /* pcrel_offset */
1610 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12
), /* type */
1612 2, /* size (0 = byte, 1 = short, 2 = long) */
1614 FALSE
, /* pc_relative */
1616 complain_overflow_unsigned
, /* complain_on_overflow */
1617 bfd_elf_generic_reloc
, /* special_function */
1618 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12
), /* name */
1619 FALSE
, /* partial_inplace */
1620 0xfff, /* src_mask */
1621 0xfff, /* dst_mask */
1622 FALSE
), /* pcrel_offset */
1624 HOWTO (AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
), /* type */
1626 2, /* size (0 = byte, 1 = short, 2 = long) */
1628 FALSE
, /* pc_relative */
1630 complain_overflow_dont
, /* complain_on_overflow */
1631 bfd_elf_generic_reloc
, /* special_function */
1632 AARCH64_R_STR (TLSLE_ADD_TPREL_LO12_NC
), /* name */
1633 FALSE
, /* partial_inplace */
1634 0xfff, /* src_mask */
1635 0xfff, /* dst_mask */
1636 FALSE
), /* pcrel_offset */
1638 HOWTO (AARCH64_R (TLSDESC_LD_PREL19
), /* type */
1640 2, /* size (0 = byte, 1 = short, 2 = long) */
1642 TRUE
, /* pc_relative */
1644 complain_overflow_dont
, /* complain_on_overflow */
1645 bfd_elf_generic_reloc
, /* special_function */
1646 AARCH64_R_STR (TLSDESC_LD_PREL19
), /* name */
1647 FALSE
, /* partial_inplace */
1648 0x0ffffe0, /* src_mask */
1649 0x0ffffe0, /* dst_mask */
1650 TRUE
), /* pcrel_offset */
1652 HOWTO (AARCH64_R (TLSDESC_ADR_PREL21
), /* type */
1654 2, /* size (0 = byte, 1 = short, 2 = long) */
1656 TRUE
, /* pc_relative */
1658 complain_overflow_dont
, /* complain_on_overflow */
1659 bfd_elf_generic_reloc
, /* special_function */
1660 AARCH64_R_STR (TLSDESC_ADR_PREL21
), /* name */
1661 FALSE
, /* partial_inplace */
1662 0x1fffff, /* src_mask */
1663 0x1fffff, /* dst_mask */
1664 TRUE
), /* pcrel_offset */
1666 /* Get to the page for the GOT entry for the symbol
1667 (G(S) - P) using an ADRP instruction. */
1668 HOWTO (AARCH64_R (TLSDESC_ADR_PAGE21
), /* type */
1669 12, /* rightshift */
1670 2, /* size (0 = byte, 1 = short, 2 = long) */
1672 TRUE
, /* pc_relative */
1674 complain_overflow_dont
, /* complain_on_overflow */
1675 bfd_elf_generic_reloc
, /* special_function */
1676 AARCH64_R_STR (TLSDESC_ADR_PAGE21
), /* name */
1677 FALSE
, /* partial_inplace */
1678 0x1fffff, /* src_mask */
1679 0x1fffff, /* dst_mask */
1680 TRUE
), /* pcrel_offset */
1682 /* LD64: GOT offset G(S) & 0xff8. */
1683 HOWTO64 (AARCH64_R (TLSDESC_LD64_LO12
), /* type */
1685 2, /* size (0 = byte, 1 = short, 2 = long) */
1687 FALSE
, /* pc_relative */
1689 complain_overflow_dont
, /* complain_on_overflow */
1690 bfd_elf_generic_reloc
, /* special_function */
1691 AARCH64_R_STR (TLSDESC_LD64_LO12
), /* name */
1692 FALSE
, /* partial_inplace */
1693 0xff8, /* src_mask */
1694 0xff8, /* dst_mask */
1695 FALSE
), /* pcrel_offset */
1697 /* LD32: GOT offset G(S) & 0xffc. */
1698 HOWTO32 (AARCH64_R (TLSDESC_LD32_LO12_NC
), /* type */
1700 2, /* size (0 = byte, 1 = short, 2 = long) */
1702 FALSE
, /* pc_relative */
1704 complain_overflow_dont
, /* complain_on_overflow */
1705 bfd_elf_generic_reloc
, /* special_function */
1706 AARCH64_R_STR (TLSDESC_LD32_LO12_NC
), /* name */
1707 FALSE
, /* partial_inplace */
1708 0xffc, /* src_mask */
1709 0xffc, /* dst_mask */
1710 FALSE
), /* pcrel_offset */
1712 /* ADD: GOT offset G(S) & 0xfff. */
1713 HOWTO (AARCH64_R (TLSDESC_ADD_LO12
), /* type */
1715 2, /* size (0 = byte, 1 = short, 2 = long) */
1717 FALSE
, /* pc_relative */
1719 complain_overflow_dont
,/* complain_on_overflow */
1720 bfd_elf_generic_reloc
, /* special_function */
1721 AARCH64_R_STR (TLSDESC_ADD_LO12
), /* name */
1722 FALSE
, /* partial_inplace */
1723 0xfff, /* src_mask */
1724 0xfff, /* dst_mask */
1725 FALSE
), /* pcrel_offset */
1727 HOWTO64 (AARCH64_R (TLSDESC_OFF_G1
), /* type */
1728 16, /* rightshift */
1729 2, /* size (0 = byte, 1 = short, 2 = long) */
1731 FALSE
, /* pc_relative */
1733 complain_overflow_unsigned
, /* complain_on_overflow */
1734 bfd_elf_generic_reloc
, /* special_function */
1735 AARCH64_R_STR (TLSDESC_OFF_G1
), /* name */
1736 FALSE
, /* partial_inplace */
1737 0xffff, /* src_mask */
1738 0xffff, /* dst_mask */
1739 FALSE
), /* pcrel_offset */
1741 HOWTO64 (AARCH64_R (TLSDESC_OFF_G0_NC
), /* 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 */
1749 AARCH64_R_STR (TLSDESC_OFF_G0_NC
), /* name */
1750 FALSE
, /* partial_inplace */
1751 0xffff, /* src_mask */
1752 0xffff, /* dst_mask */
1753 FALSE
), /* pcrel_offset */
1755 HOWTO64 (AARCH64_R (TLSDESC_LDR
), /* type */
1757 2, /* size (0 = byte, 1 = short, 2 = long) */
1759 FALSE
, /* pc_relative */
1761 complain_overflow_dont
, /* complain_on_overflow */
1762 bfd_elf_generic_reloc
, /* special_function */
1763 AARCH64_R_STR (TLSDESC_LDR
), /* name */
1764 FALSE
, /* partial_inplace */
1767 FALSE
), /* pcrel_offset */
1769 HOWTO64 (AARCH64_R (TLSDESC_ADD
), /* type */
1771 2, /* size (0 = byte, 1 = short, 2 = long) */
1773 FALSE
, /* pc_relative */
1775 complain_overflow_dont
, /* complain_on_overflow */
1776 bfd_elf_generic_reloc
, /* special_function */
1777 AARCH64_R_STR (TLSDESC_ADD
), /* name */
1778 FALSE
, /* partial_inplace */
1781 FALSE
), /* pcrel_offset */
1783 HOWTO (AARCH64_R (TLSDESC_CALL
), /* type */
1785 2, /* size (0 = byte, 1 = short, 2 = long) */
1787 FALSE
, /* pc_relative */
1789 complain_overflow_dont
, /* complain_on_overflow */
1790 bfd_elf_generic_reloc
, /* special_function */
1791 AARCH64_R_STR (TLSDESC_CALL
), /* name */
1792 FALSE
, /* partial_inplace */
1795 FALSE
), /* pcrel_offset */
1797 HOWTO (AARCH64_R (COPY
), /* type */
1799 2, /* size (0 = byte, 1 = short, 2 = long) */
1801 FALSE
, /* pc_relative */
1803 complain_overflow_bitfield
, /* complain_on_overflow */
1804 bfd_elf_generic_reloc
, /* special_function */
1805 AARCH64_R_STR (COPY
), /* name */
1806 TRUE
, /* partial_inplace */
1807 0xffffffff, /* src_mask */
1808 0xffffffff, /* dst_mask */
1809 FALSE
), /* pcrel_offset */
1811 HOWTO (AARCH64_R (GLOB_DAT
), /* type */
1813 2, /* size (0 = byte, 1 = short, 2 = long) */
1815 FALSE
, /* pc_relative */
1817 complain_overflow_bitfield
, /* complain_on_overflow */
1818 bfd_elf_generic_reloc
, /* special_function */
1819 AARCH64_R_STR (GLOB_DAT
), /* name */
1820 TRUE
, /* partial_inplace */
1821 0xffffffff, /* src_mask */
1822 0xffffffff, /* dst_mask */
1823 FALSE
), /* pcrel_offset */
1825 HOWTO (AARCH64_R (JUMP_SLOT
), /* type */
1827 2, /* size (0 = byte, 1 = short, 2 = long) */
1829 FALSE
, /* pc_relative */
1831 complain_overflow_bitfield
, /* complain_on_overflow */
1832 bfd_elf_generic_reloc
, /* special_function */
1833 AARCH64_R_STR (JUMP_SLOT
), /* name */
1834 TRUE
, /* partial_inplace */
1835 0xffffffff, /* src_mask */
1836 0xffffffff, /* dst_mask */
1837 FALSE
), /* pcrel_offset */
1839 HOWTO (AARCH64_R (RELATIVE
), /* type */
1841 2, /* size (0 = byte, 1 = short, 2 = long) */
1843 FALSE
, /* pc_relative */
1845 complain_overflow_bitfield
, /* complain_on_overflow */
1846 bfd_elf_generic_reloc
, /* special_function */
1847 AARCH64_R_STR (RELATIVE
), /* name */
1848 TRUE
, /* partial_inplace */
1849 ALL_ONES
, /* src_mask */
1850 ALL_ONES
, /* dst_mask */
1851 FALSE
), /* pcrel_offset */
1853 HOWTO (AARCH64_R (TLS_DTPMOD
), /* type */
1855 2, /* size (0 = byte, 1 = short, 2 = long) */
1857 FALSE
, /* pc_relative */
1859 complain_overflow_dont
, /* complain_on_overflow */
1860 bfd_elf_generic_reloc
, /* special_function */
1862 AARCH64_R_STR (TLS_DTPMOD64
), /* name */
1864 AARCH64_R_STR (TLS_DTPMOD
), /* name */
1866 FALSE
, /* partial_inplace */
1868 ALL_ONES
, /* dst_mask */
1869 FALSE
), /* pc_reloffset */
1871 HOWTO (AARCH64_R (TLS_DTPREL
), /* type */
1873 2, /* size (0 = byte, 1 = short, 2 = long) */
1875 FALSE
, /* pc_relative */
1877 complain_overflow_dont
, /* complain_on_overflow */
1878 bfd_elf_generic_reloc
, /* special_function */
1880 AARCH64_R_STR (TLS_DTPREL64
), /* name */
1882 AARCH64_R_STR (TLS_DTPREL
), /* name */
1884 FALSE
, /* partial_inplace */
1886 ALL_ONES
, /* dst_mask */
1887 FALSE
), /* pcrel_offset */
1889 HOWTO (AARCH64_R (TLS_TPREL
), /* type */
1891 2, /* size (0 = byte, 1 = short, 2 = long) */
1893 FALSE
, /* pc_relative */
1895 complain_overflow_dont
, /* complain_on_overflow */
1896 bfd_elf_generic_reloc
, /* special_function */
1898 AARCH64_R_STR (TLS_TPREL64
), /* name */
1900 AARCH64_R_STR (TLS_TPREL
), /* name */
1902 FALSE
, /* partial_inplace */
1904 ALL_ONES
, /* dst_mask */
1905 FALSE
), /* pcrel_offset */
1907 HOWTO (AARCH64_R (TLSDESC
), /* type */
1909 2, /* size (0 = byte, 1 = short, 2 = long) */
1911 FALSE
, /* pc_relative */
1913 complain_overflow_dont
, /* complain_on_overflow */
1914 bfd_elf_generic_reloc
, /* special_function */
1915 AARCH64_R_STR (TLSDESC
), /* name */
1916 FALSE
, /* partial_inplace */
1918 ALL_ONES
, /* dst_mask */
1919 FALSE
), /* pcrel_offset */
1921 HOWTO (AARCH64_R (IRELATIVE
), /* type */
1923 2, /* size (0 = byte, 1 = short, 2 = long) */
1925 FALSE
, /* pc_relative */
1927 complain_overflow_bitfield
, /* complain_on_overflow */
1928 bfd_elf_generic_reloc
, /* special_function */
1929 AARCH64_R_STR (IRELATIVE
), /* name */
1930 FALSE
, /* partial_inplace */
1932 ALL_ONES
, /* dst_mask */
1933 FALSE
), /* pcrel_offset */
1938 static reloc_howto_type elfNN_aarch64_howto_none
=
1939 HOWTO (R_AARCH64_NONE
, /* type */
1941 3, /* size (0 = byte, 1 = short, 2 = long) */
1943 FALSE
, /* pc_relative */
1945 complain_overflow_dont
,/* complain_on_overflow */
1946 bfd_elf_generic_reloc
, /* special_function */
1947 "R_AARCH64_NONE", /* name */
1948 FALSE
, /* partial_inplace */
1951 FALSE
); /* pcrel_offset */
1953 /* Given HOWTO, return the bfd internal relocation enumerator. */
1955 static bfd_reloc_code_real_type
1956 elfNN_aarch64_bfd_reloc_from_howto (reloc_howto_type
*howto
)
1959 = (int) ARRAY_SIZE (elfNN_aarch64_howto_table
);
1960 const ptrdiff_t offset
1961 = howto
- elfNN_aarch64_howto_table
;
1963 if (offset
> 0 && offset
< size
- 1)
1964 return BFD_RELOC_AARCH64_RELOC_START
+ offset
;
1966 if (howto
== &elfNN_aarch64_howto_none
)
1967 return BFD_RELOC_AARCH64_NONE
;
1969 return BFD_RELOC_AARCH64_RELOC_START
;
1972 /* Given R_TYPE, return the bfd internal relocation enumerator. */
1974 static bfd_reloc_code_real_type
1975 elfNN_aarch64_bfd_reloc_from_type (bfd
*abfd
, unsigned int r_type
)
1977 static bfd_boolean initialized_p
= FALSE
;
1978 /* Indexed by R_TYPE, values are offsets in the howto_table. */
1979 static unsigned int offsets
[R_AARCH64_end
];
1985 for (i
= 1; i
< ARRAY_SIZE (elfNN_aarch64_howto_table
) - 1; ++i
)
1986 if (elfNN_aarch64_howto_table
[i
].type
!= 0)
1987 offsets
[elfNN_aarch64_howto_table
[i
].type
] = i
;
1989 initialized_p
= TRUE
;
1992 if (r_type
== R_AARCH64_NONE
|| r_type
== R_AARCH64_NULL
)
1993 return BFD_RELOC_AARCH64_NONE
;
1995 /* PR 17512: file: b371e70a. */
1996 if (r_type
>= R_AARCH64_end
)
1998 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
2000 bfd_set_error (bfd_error_bad_value
);
2001 return BFD_RELOC_AARCH64_NONE
;
2004 return BFD_RELOC_AARCH64_RELOC_START
+ offsets
[r_type
];
2007 struct elf_aarch64_reloc_map
2009 bfd_reloc_code_real_type from
;
2010 bfd_reloc_code_real_type to
;
2013 /* Map bfd generic reloc to AArch64-specific reloc. */
2014 static const struct elf_aarch64_reloc_map elf_aarch64_reloc_map
[] =
2016 {BFD_RELOC_NONE
, BFD_RELOC_AARCH64_NONE
},
2018 /* Basic data relocations. */
2019 {BFD_RELOC_CTOR
, BFD_RELOC_AARCH64_NN
},
2020 {BFD_RELOC_64
, BFD_RELOC_AARCH64_64
},
2021 {BFD_RELOC_32
, BFD_RELOC_AARCH64_32
},
2022 {BFD_RELOC_16
, BFD_RELOC_AARCH64_16
},
2023 {BFD_RELOC_64_PCREL
, BFD_RELOC_AARCH64_64_PCREL
},
2024 {BFD_RELOC_32_PCREL
, BFD_RELOC_AARCH64_32_PCREL
},
2025 {BFD_RELOC_16_PCREL
, BFD_RELOC_AARCH64_16_PCREL
},
2028 /* Given the bfd internal relocation enumerator in CODE, return the
2029 corresponding howto entry. */
2031 static reloc_howto_type
*
2032 elfNN_aarch64_howto_from_bfd_reloc (bfd_reloc_code_real_type code
)
2036 /* Convert bfd generic reloc to AArch64-specific reloc. */
2037 if (code
< BFD_RELOC_AARCH64_RELOC_START
2038 || code
> BFD_RELOC_AARCH64_RELOC_END
)
2039 for (i
= 0; i
< ARRAY_SIZE (elf_aarch64_reloc_map
); i
++)
2040 if (elf_aarch64_reloc_map
[i
].from
== code
)
2042 code
= elf_aarch64_reloc_map
[i
].to
;
2046 if (code
> BFD_RELOC_AARCH64_RELOC_START
2047 && code
< BFD_RELOC_AARCH64_RELOC_END
)
2048 if (elfNN_aarch64_howto_table
[code
- BFD_RELOC_AARCH64_RELOC_START
].type
)
2049 return &elfNN_aarch64_howto_table
[code
- BFD_RELOC_AARCH64_RELOC_START
];
2051 if (code
== BFD_RELOC_AARCH64_NONE
)
2052 return &elfNN_aarch64_howto_none
;
2057 static reloc_howto_type
*
2058 elfNN_aarch64_howto_from_type (bfd
*abfd
, unsigned int r_type
)
2060 bfd_reloc_code_real_type val
;
2061 reloc_howto_type
*howto
;
2066 bfd_set_error (bfd_error_bad_value
);
2071 if (r_type
== R_AARCH64_NONE
)
2072 return &elfNN_aarch64_howto_none
;
2074 val
= elfNN_aarch64_bfd_reloc_from_type (abfd
, r_type
);
2075 howto
= elfNN_aarch64_howto_from_bfd_reloc (val
);
2080 bfd_set_error (bfd_error_bad_value
);
2085 elfNN_aarch64_info_to_howto (bfd
*abfd
, arelent
*bfd_reloc
,
2086 Elf_Internal_Rela
*elf_reloc
)
2088 unsigned int r_type
;
2090 r_type
= ELFNN_R_TYPE (elf_reloc
->r_info
);
2091 bfd_reloc
->howto
= elfNN_aarch64_howto_from_type (abfd
, r_type
);
2093 if (bfd_reloc
->howto
== NULL
)
2095 /* xgettext:c-format */
2096 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd
, r_type
);
2102 static reloc_howto_type
*
2103 elfNN_aarch64_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
2104 bfd_reloc_code_real_type code
)
2106 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (code
);
2111 bfd_set_error (bfd_error_bad_value
);
2115 static reloc_howto_type
*
2116 elfNN_aarch64_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
2121 for (i
= 1; i
< ARRAY_SIZE (elfNN_aarch64_howto_table
) - 1; ++i
)
2122 if (elfNN_aarch64_howto_table
[i
].name
!= NULL
2123 && strcasecmp (elfNN_aarch64_howto_table
[i
].name
, r_name
) == 0)
2124 return &elfNN_aarch64_howto_table
[i
];
2129 #define TARGET_LITTLE_SYM aarch64_elfNN_le_vec
2130 #define TARGET_LITTLE_NAME "elfNN-littleaarch64"
2131 #define TARGET_BIG_SYM aarch64_elfNN_be_vec
2132 #define TARGET_BIG_NAME "elfNN-bigaarch64"
2134 /* The linker script knows the section names for placement.
2135 The entry_names are used to do simple name mangling on the stubs.
2136 Given a function name, and its type, the stub can be found. The
2137 name can be changed. The only requirement is the %s be present. */
2138 #define STUB_ENTRY_NAME "__%s_veneer"
2140 /* The name of the dynamic interpreter. This is put in the .interp
2142 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
2144 #define AARCH64_MAX_FWD_BRANCH_OFFSET \
2145 (((1 << 25) - 1) << 2)
2146 #define AARCH64_MAX_BWD_BRANCH_OFFSET \
2149 #define AARCH64_MAX_ADRP_IMM ((1 << 20) - 1)
2150 #define AARCH64_MIN_ADRP_IMM (-(1 << 20))
2153 aarch64_valid_for_adrp_p (bfd_vma value
, bfd_vma place
)
2155 bfd_signed_vma offset
= (bfd_signed_vma
) (PG (value
) - PG (place
)) >> 12;
2156 return offset
<= AARCH64_MAX_ADRP_IMM
&& offset
>= AARCH64_MIN_ADRP_IMM
;
2160 aarch64_valid_branch_p (bfd_vma value
, bfd_vma place
)
2162 bfd_signed_vma offset
= (bfd_signed_vma
) (value
- place
);
2163 return (offset
<= AARCH64_MAX_FWD_BRANCH_OFFSET
2164 && offset
>= AARCH64_MAX_BWD_BRANCH_OFFSET
);
2167 static const uint32_t aarch64_adrp_branch_stub
[] =
2169 0x90000010, /* adrp ip0, X */
2170 /* R_AARCH64_ADR_HI21_PCREL(X) */
2171 0x91000210, /* add ip0, ip0, :lo12:X */
2172 /* R_AARCH64_ADD_ABS_LO12_NC(X) */
2173 0xd61f0200, /* br ip0 */
2176 static const uint32_t aarch64_long_branch_stub
[] =
2179 0x58000090, /* ldr ip0, 1f */
2181 0x18000090, /* ldr wip0, 1f */
2183 0x10000011, /* adr ip1, #0 */
2184 0x8b110210, /* add ip0, ip0, ip1 */
2185 0xd61f0200, /* br ip0 */
2186 0x00000000, /* 1: .xword or .word
2187 R_AARCH64_PRELNN(X) + 12
2192 static const uint32_t aarch64_erratum_835769_stub
[] =
2194 0x00000000, /* Placeholder for multiply accumulate. */
2195 0x14000000, /* b <label> */
2198 static const uint32_t aarch64_erratum_843419_stub
[] =
2200 0x00000000, /* Placeholder for LDR instruction. */
2201 0x14000000, /* b <label> */
2204 /* Section name for stubs is the associated section name plus this
2206 #define STUB_SUFFIX ".stub"
2208 enum elf_aarch64_stub_type
2211 aarch64_stub_adrp_branch
,
2212 aarch64_stub_long_branch
,
2213 aarch64_stub_erratum_835769_veneer
,
2214 aarch64_stub_erratum_843419_veneer
,
2217 struct elf_aarch64_stub_hash_entry
2219 /* Base hash table entry structure. */
2220 struct bfd_hash_entry root
;
2222 /* The stub section. */
2225 /* Offset within stub_sec of the beginning of this stub. */
2226 bfd_vma stub_offset
;
2228 /* Given the symbol's value and its section we can determine its final
2229 value when building the stubs (so the stub knows where to jump). */
2230 bfd_vma target_value
;
2231 asection
*target_section
;
2233 enum elf_aarch64_stub_type stub_type
;
2235 /* The symbol table entry, if any, that this was derived from. */
2236 struct elf_aarch64_link_hash_entry
*h
;
2238 /* Destination symbol type */
2239 unsigned char st_type
;
2241 /* Where this stub is being called from, or, in the case of combined
2242 stub sections, the first input section in the group. */
2245 /* The name for the local symbol at the start of this stub. The
2246 stub name in the hash table has to be unique; this does not, so
2247 it can be friendlier. */
2250 /* The instruction which caused this stub to be generated (only valid for
2251 erratum 835769 workaround stubs at present). */
2252 uint32_t veneered_insn
;
2254 /* In an erratum 843419 workaround stub, the ADRP instruction offset. */
2255 bfd_vma adrp_offset
;
2258 /* Used to build a map of a section. This is required for mixed-endian
2261 typedef struct elf_elf_section_map
2266 elf_aarch64_section_map
;
2269 typedef struct _aarch64_elf_section_data
2271 struct bfd_elf_section_data elf
;
2272 unsigned int mapcount
;
2273 unsigned int mapsize
;
2274 elf_aarch64_section_map
*map
;
2276 _aarch64_elf_section_data
;
2278 #define elf_aarch64_section_data(sec) \
2279 ((_aarch64_elf_section_data *) elf_section_data (sec))
2281 /* The size of the thread control block which is defined to be two pointers. */
2282 #define TCB_SIZE (ARCH_SIZE/8)*2
2284 struct elf_aarch64_local_symbol
2286 unsigned int got_type
;
2287 bfd_signed_vma got_refcount
;
2290 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The
2291 offset is from the end of the jump table and reserved entries
2294 The magic value (bfd_vma) -1 indicates that an offset has not be
2296 bfd_vma tlsdesc_got_jump_table_offset
;
2299 struct elf_aarch64_obj_tdata
2301 struct elf_obj_tdata root
;
2303 /* local symbol descriptors */
2304 struct elf_aarch64_local_symbol
*locals
;
2306 /* Zero to warn when linking objects with incompatible enum sizes. */
2307 int no_enum_size_warning
;
2309 /* Zero to warn when linking objects with incompatible wchar_t sizes. */
2310 int no_wchar_size_warning
;
2313 #define elf_aarch64_tdata(bfd) \
2314 ((struct elf_aarch64_obj_tdata *) (bfd)->tdata.any)
2316 #define elf_aarch64_locals(bfd) (elf_aarch64_tdata (bfd)->locals)
2318 #define is_aarch64_elf(bfd) \
2319 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
2320 && elf_tdata (bfd) != NULL \
2321 && elf_object_id (bfd) == AARCH64_ELF_DATA)
2324 elfNN_aarch64_mkobject (bfd
*abfd
)
2326 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_aarch64_obj_tdata
),
2330 #define elf_aarch64_hash_entry(ent) \
2331 ((struct elf_aarch64_link_hash_entry *)(ent))
2333 #define GOT_UNKNOWN 0
2334 #define GOT_NORMAL 1
2335 #define GOT_TLS_GD 2
2336 #define GOT_TLS_IE 4
2337 #define GOT_TLSDESC_GD 8
2339 #define GOT_TLS_GD_ANY_P(type) ((type & GOT_TLS_GD) || (type & GOT_TLSDESC_GD))
2341 /* AArch64 ELF linker hash entry. */
2342 struct elf_aarch64_link_hash_entry
2344 struct elf_link_hash_entry root
;
2346 /* Track dynamic relocs copied for this symbol. */
2347 struct elf_dyn_relocs
*dyn_relocs
;
2349 /* Since PLT entries have variable size, we need to record the
2350 index into .got.plt instead of recomputing it from the PLT
2352 bfd_signed_vma plt_got_offset
;
2354 /* Bit mask representing the type of GOT entry(s) if any required by
2356 unsigned int got_type
;
2358 /* A pointer to the most recently used stub hash entry against this
2360 struct elf_aarch64_stub_hash_entry
*stub_cache
;
2362 /* Offset of the GOTPLT entry reserved for the TLS descriptor. The offset
2363 is from the end of the jump table and reserved entries within the PLTGOT.
2365 The magic value (bfd_vma) -1 indicates that an offset has not
2367 bfd_vma tlsdesc_got_jump_table_offset
;
2371 elfNN_aarch64_symbol_got_type (struct elf_link_hash_entry
*h
,
2373 unsigned long r_symndx
)
2376 return elf_aarch64_hash_entry (h
)->got_type
;
2378 if (! elf_aarch64_locals (abfd
))
2381 return elf_aarch64_locals (abfd
)[r_symndx
].got_type
;
2384 /* Get the AArch64 elf linker hash table from a link_info structure. */
2385 #define elf_aarch64_hash_table(info) \
2386 ((struct elf_aarch64_link_hash_table *) ((info)->hash))
2388 #define aarch64_stub_hash_lookup(table, string, create, copy) \
2389 ((struct elf_aarch64_stub_hash_entry *) \
2390 bfd_hash_lookup ((table), (string), (create), (copy)))
2392 /* AArch64 ELF linker hash table. */
2393 struct elf_aarch64_link_hash_table
2395 /* The main hash table. */
2396 struct elf_link_hash_table root
;
2398 /* Nonzero to force PIC branch veneers. */
2401 /* Fix erratum 835769. */
2402 int fix_erratum_835769
;
2404 /* Fix erratum 843419. */
2405 int fix_erratum_843419
;
2407 /* Enable ADRP->ADR rewrite for erratum 843419 workaround. */
2408 int fix_erratum_843419_adr
;
2410 /* Don't apply link-time values for dynamic relocations. */
2411 int no_apply_dynamic_relocs
;
2413 /* The number of bytes in the initial entry in the PLT. */
2414 bfd_size_type plt_header_size
;
2416 /* The number of bytes in the subsequent PLT etries. */
2417 bfd_size_type plt_entry_size
;
2419 /* Small local sym cache. */
2420 struct sym_cache sym_cache
;
2422 /* For convenience in allocate_dynrelocs. */
2425 /* The amount of space used by the reserved portion of the sgotplt
2426 section, plus whatever space is used by the jump slots. */
2427 bfd_vma sgotplt_jump_table_size
;
2429 /* The stub hash table. */
2430 struct bfd_hash_table stub_hash_table
;
2432 /* Linker stub bfd. */
2435 /* Linker call-backs. */
2436 asection
*(*add_stub_section
) (const char *, asection
*);
2437 void (*layout_sections_again
) (void);
2439 /* Array to keep track of which stub sections have been created, and
2440 information on stub grouping. */
2443 /* This is the section to which stubs in the group will be
2446 /* The stub section. */
2450 /* Assorted information used by elfNN_aarch64_size_stubs. */
2451 unsigned int bfd_count
;
2452 unsigned int top_index
;
2453 asection
**input_list
;
2455 /* The offset into splt of the PLT entry for the TLS descriptor
2456 resolver. Special values are 0, if not necessary (or not found
2457 to be necessary yet), and -1 if needed but not determined
2459 bfd_vma tlsdesc_plt
;
2461 /* The GOT offset for the lazy trampoline. Communicated to the
2462 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
2463 indicates an offset is not allocated. */
2464 bfd_vma dt_tlsdesc_got
;
2466 /* Used by local STT_GNU_IFUNC symbols. */
2467 htab_t loc_hash_table
;
2468 void * loc_hash_memory
;
2471 /* Create an entry in an AArch64 ELF linker hash table. */
2473 static struct bfd_hash_entry
*
2474 elfNN_aarch64_link_hash_newfunc (struct bfd_hash_entry
*entry
,
2475 struct bfd_hash_table
*table
,
2478 struct elf_aarch64_link_hash_entry
*ret
=
2479 (struct elf_aarch64_link_hash_entry
*) entry
;
2481 /* Allocate the structure if it has not already been allocated by a
2484 ret
= bfd_hash_allocate (table
,
2485 sizeof (struct elf_aarch64_link_hash_entry
));
2487 return (struct bfd_hash_entry
*) ret
;
2489 /* Call the allocation method of the superclass. */
2490 ret
= ((struct elf_aarch64_link_hash_entry
*)
2491 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry
*) ret
,
2495 ret
->dyn_relocs
= NULL
;
2496 ret
->got_type
= GOT_UNKNOWN
;
2497 ret
->plt_got_offset
= (bfd_vma
) - 1;
2498 ret
->stub_cache
= NULL
;
2499 ret
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
2502 return (struct bfd_hash_entry
*) ret
;
2505 /* Initialize an entry in the stub hash table. */
2507 static struct bfd_hash_entry
*
2508 stub_hash_newfunc (struct bfd_hash_entry
*entry
,
2509 struct bfd_hash_table
*table
, const char *string
)
2511 /* Allocate the structure if it has not already been allocated by a
2515 entry
= bfd_hash_allocate (table
,
2517 elf_aarch64_stub_hash_entry
));
2522 /* Call the allocation method of the superclass. */
2523 entry
= bfd_hash_newfunc (entry
, table
, string
);
2526 struct elf_aarch64_stub_hash_entry
*eh
;
2528 /* Initialize the local fields. */
2529 eh
= (struct elf_aarch64_stub_hash_entry
*) entry
;
2530 eh
->adrp_offset
= 0;
2531 eh
->stub_sec
= NULL
;
2532 eh
->stub_offset
= 0;
2533 eh
->target_value
= 0;
2534 eh
->target_section
= NULL
;
2535 eh
->stub_type
= aarch64_stub_none
;
2543 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
2544 for local symbol so that we can handle local STT_GNU_IFUNC symbols
2545 as global symbol. We reuse indx and dynstr_index for local symbol
2546 hash since they aren't used by global symbols in this backend. */
2549 elfNN_aarch64_local_htab_hash (const void *ptr
)
2551 struct elf_link_hash_entry
*h
2552 = (struct elf_link_hash_entry
*) ptr
;
2553 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
2556 /* Compare local hash entries. */
2559 elfNN_aarch64_local_htab_eq (const void *ptr1
, const void *ptr2
)
2561 struct elf_link_hash_entry
*h1
2562 = (struct elf_link_hash_entry
*) ptr1
;
2563 struct elf_link_hash_entry
*h2
2564 = (struct elf_link_hash_entry
*) ptr2
;
2566 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
2569 /* Find and/or create a hash entry for local symbol. */
2571 static struct elf_link_hash_entry
*
2572 elfNN_aarch64_get_local_sym_hash (struct elf_aarch64_link_hash_table
*htab
,
2573 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
2576 struct elf_aarch64_link_hash_entry e
, *ret
;
2577 asection
*sec
= abfd
->sections
;
2578 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
2579 ELFNN_R_SYM (rel
->r_info
));
2582 e
.root
.indx
= sec
->id
;
2583 e
.root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2584 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
2585 create
? INSERT
: NO_INSERT
);
2592 ret
= (struct elf_aarch64_link_hash_entry
*) *slot
;
2596 ret
= (struct elf_aarch64_link_hash_entry
*)
2597 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
2598 sizeof (struct elf_aarch64_link_hash_entry
));
2601 memset (ret
, 0, sizeof (*ret
));
2602 ret
->root
.indx
= sec
->id
;
2603 ret
->root
.dynstr_index
= ELFNN_R_SYM (rel
->r_info
);
2604 ret
->root
.dynindx
= -1;
2610 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2613 elfNN_aarch64_copy_indirect_symbol (struct bfd_link_info
*info
,
2614 struct elf_link_hash_entry
*dir
,
2615 struct elf_link_hash_entry
*ind
)
2617 struct elf_aarch64_link_hash_entry
*edir
, *eind
;
2619 edir
= (struct elf_aarch64_link_hash_entry
*) dir
;
2620 eind
= (struct elf_aarch64_link_hash_entry
*) ind
;
2622 if (eind
->dyn_relocs
!= NULL
)
2624 if (edir
->dyn_relocs
!= NULL
)
2626 struct elf_dyn_relocs
**pp
;
2627 struct elf_dyn_relocs
*p
;
2629 /* Add reloc counts against the indirect sym to the direct sym
2630 list. Merge any entries against the same section. */
2631 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
;)
2633 struct elf_dyn_relocs
*q
;
2635 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
2636 if (q
->sec
== p
->sec
)
2638 q
->pc_count
+= p
->pc_count
;
2639 q
->count
+= p
->count
;
2646 *pp
= edir
->dyn_relocs
;
2649 edir
->dyn_relocs
= eind
->dyn_relocs
;
2650 eind
->dyn_relocs
= NULL
;
2653 if (ind
->root
.type
== bfd_link_hash_indirect
)
2655 /* Copy over PLT info. */
2656 if (dir
->got
.refcount
<= 0)
2658 edir
->got_type
= eind
->got_type
;
2659 eind
->got_type
= GOT_UNKNOWN
;
2663 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
2666 /* Destroy an AArch64 elf linker hash table. */
2669 elfNN_aarch64_link_hash_table_free (bfd
*obfd
)
2671 struct elf_aarch64_link_hash_table
*ret
2672 = (struct elf_aarch64_link_hash_table
*) obfd
->link
.hash
;
2674 if (ret
->loc_hash_table
)
2675 htab_delete (ret
->loc_hash_table
);
2676 if (ret
->loc_hash_memory
)
2677 objalloc_free ((struct objalloc
*) ret
->loc_hash_memory
);
2679 bfd_hash_table_free (&ret
->stub_hash_table
);
2680 _bfd_elf_link_hash_table_free (obfd
);
2683 /* Create an AArch64 elf linker hash table. */
2685 static struct bfd_link_hash_table
*
2686 elfNN_aarch64_link_hash_table_create (bfd
*abfd
)
2688 struct elf_aarch64_link_hash_table
*ret
;
2689 bfd_size_type amt
= sizeof (struct elf_aarch64_link_hash_table
);
2691 ret
= bfd_zmalloc (amt
);
2695 if (!_bfd_elf_link_hash_table_init
2696 (&ret
->root
, abfd
, elfNN_aarch64_link_hash_newfunc
,
2697 sizeof (struct elf_aarch64_link_hash_entry
), AARCH64_ELF_DATA
))
2703 ret
->plt_header_size
= PLT_ENTRY_SIZE
;
2704 ret
->plt_entry_size
= PLT_SMALL_ENTRY_SIZE
;
2706 ret
->dt_tlsdesc_got
= (bfd_vma
) - 1;
2708 if (!bfd_hash_table_init (&ret
->stub_hash_table
, stub_hash_newfunc
,
2709 sizeof (struct elf_aarch64_stub_hash_entry
)))
2711 _bfd_elf_link_hash_table_free (abfd
);
2715 ret
->loc_hash_table
= htab_try_create (1024,
2716 elfNN_aarch64_local_htab_hash
,
2717 elfNN_aarch64_local_htab_eq
,
2719 ret
->loc_hash_memory
= objalloc_create ();
2720 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
2722 elfNN_aarch64_link_hash_table_free (abfd
);
2725 ret
->root
.root
.hash_table_free
= elfNN_aarch64_link_hash_table_free
;
2727 return &ret
->root
.root
;
2730 /* Perform relocation R_TYPE. Returns TRUE upon success, FALSE otherwise. */
2733 aarch64_relocate (unsigned int r_type
, bfd
*input_bfd
, asection
*input_section
,
2734 bfd_vma offset
, bfd_vma value
)
2736 reloc_howto_type
*howto
;
2739 howto
= elfNN_aarch64_howto_from_type (input_bfd
, r_type
);
2740 place
= (input_section
->output_section
->vma
+ input_section
->output_offset
2743 r_type
= elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
2744 value
= _bfd_aarch64_elf_resolve_relocation (r_type
, place
, value
, 0, FALSE
);
2745 return _bfd_aarch64_elf_put_addend (input_bfd
,
2746 input_section
->contents
+ offset
, r_type
,
2747 howto
, value
) == bfd_reloc_ok
;
2750 static enum elf_aarch64_stub_type
2751 aarch64_select_branch_stub (bfd_vma value
, bfd_vma place
)
2753 if (aarch64_valid_for_adrp_p (value
, place
))
2754 return aarch64_stub_adrp_branch
;
2755 return aarch64_stub_long_branch
;
2758 /* Determine the type of stub needed, if any, for a call. */
2760 static enum elf_aarch64_stub_type
2761 aarch64_type_of_stub (asection
*input_sec
,
2762 const Elf_Internal_Rela
*rel
,
2764 unsigned char st_type
,
2765 bfd_vma destination
)
2768 bfd_signed_vma branch_offset
;
2769 unsigned int r_type
;
2770 enum elf_aarch64_stub_type stub_type
= aarch64_stub_none
;
2772 if (st_type
!= STT_FUNC
2773 && (sym_sec
== input_sec
))
2776 /* Determine where the call point is. */
2777 location
= (input_sec
->output_offset
2778 + input_sec
->output_section
->vma
+ rel
->r_offset
);
2780 branch_offset
= (bfd_signed_vma
) (destination
- location
);
2782 r_type
= ELFNN_R_TYPE (rel
->r_info
);
2784 /* We don't want to redirect any old unconditional jump in this way,
2785 only one which is being used for a sibcall, where it is
2786 acceptable for the IP0 and IP1 registers to be clobbered. */
2787 if ((r_type
== AARCH64_R (CALL26
) || r_type
== AARCH64_R (JUMP26
))
2788 && (branch_offset
> AARCH64_MAX_FWD_BRANCH_OFFSET
2789 || branch_offset
< AARCH64_MAX_BWD_BRANCH_OFFSET
))
2791 stub_type
= aarch64_stub_long_branch
;
2797 /* Build a name for an entry in the stub hash table. */
2800 elfNN_aarch64_stub_name (const asection
*input_section
,
2801 const asection
*sym_sec
,
2802 const struct elf_aarch64_link_hash_entry
*hash
,
2803 const Elf_Internal_Rela
*rel
)
2810 len
= 8 + 1 + strlen (hash
->root
.root
.root
.string
) + 1 + 16 + 1;
2811 stub_name
= bfd_malloc (len
);
2812 if (stub_name
!= NULL
)
2813 snprintf (stub_name
, len
, "%08x_%s+%" BFD_VMA_FMT
"x",
2814 (unsigned int) input_section
->id
,
2815 hash
->root
.root
.root
.string
,
2820 len
= 8 + 1 + 8 + 1 + 8 + 1 + 16 + 1;
2821 stub_name
= bfd_malloc (len
);
2822 if (stub_name
!= NULL
)
2823 snprintf (stub_name
, len
, "%08x_%x:%x+%" BFD_VMA_FMT
"x",
2824 (unsigned int) input_section
->id
,
2825 (unsigned int) sym_sec
->id
,
2826 (unsigned int) ELFNN_R_SYM (rel
->r_info
),
2833 /* Return TRUE if symbol H should be hashed in the `.gnu.hash' section. For
2834 executable PLT slots where the executable never takes the address of those
2835 functions, the function symbols are not added to the hash table. */
2838 elf_aarch64_hash_symbol (struct elf_link_hash_entry
*h
)
2840 if (h
->plt
.offset
!= (bfd_vma
) -1
2842 && !h
->pointer_equality_needed
)
2845 return _bfd_elf_hash_symbol (h
);
2849 /* Look up an entry in the stub hash. Stub entries are cached because
2850 creating the stub name takes a bit of time. */
2852 static struct elf_aarch64_stub_hash_entry
*
2853 elfNN_aarch64_get_stub_entry (const asection
*input_section
,
2854 const asection
*sym_sec
,
2855 struct elf_link_hash_entry
*hash
,
2856 const Elf_Internal_Rela
*rel
,
2857 struct elf_aarch64_link_hash_table
*htab
)
2859 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2860 struct elf_aarch64_link_hash_entry
*h
=
2861 (struct elf_aarch64_link_hash_entry
*) hash
;
2862 const asection
*id_sec
;
2864 if ((input_section
->flags
& SEC_CODE
) == 0)
2867 /* If this input section is part of a group of sections sharing one
2868 stub section, then use the id of the first section in the group.
2869 Stub names need to include a section id, as there may well be
2870 more than one stub used to reach say, printf, and we need to
2871 distinguish between them. */
2872 id_sec
= htab
->stub_group
[input_section
->id
].link_sec
;
2874 if (h
!= NULL
&& h
->stub_cache
!= NULL
2875 && h
->stub_cache
->h
== h
&& h
->stub_cache
->id_sec
== id_sec
)
2877 stub_entry
= h
->stub_cache
;
2883 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, h
, rel
);
2884 if (stub_name
== NULL
)
2887 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
2888 stub_name
, FALSE
, FALSE
);
2890 h
->stub_cache
= stub_entry
;
2899 /* Create a stub section. */
2902 _bfd_aarch64_create_stub_section (asection
*section
,
2903 struct elf_aarch64_link_hash_table
*htab
)
2909 namelen
= strlen (section
->name
);
2910 len
= namelen
+ sizeof (STUB_SUFFIX
);
2911 s_name
= bfd_alloc (htab
->stub_bfd
, len
);
2915 memcpy (s_name
, section
->name
, namelen
);
2916 memcpy (s_name
+ namelen
, STUB_SUFFIX
, sizeof (STUB_SUFFIX
));
2917 return (*htab
->add_stub_section
) (s_name
, section
);
2921 /* Find or create a stub section for a link section.
2923 Fix or create the stub section used to collect stubs attached to
2924 the specified link section. */
2927 _bfd_aarch64_get_stub_for_link_section (asection
*link_section
,
2928 struct elf_aarch64_link_hash_table
*htab
)
2930 if (htab
->stub_group
[link_section
->id
].stub_sec
== NULL
)
2931 htab
->stub_group
[link_section
->id
].stub_sec
2932 = _bfd_aarch64_create_stub_section (link_section
, htab
);
2933 return htab
->stub_group
[link_section
->id
].stub_sec
;
2937 /* Find or create a stub section in the stub group for an input
2941 _bfd_aarch64_create_or_find_stub_sec (asection
*section
,
2942 struct elf_aarch64_link_hash_table
*htab
)
2944 asection
*link_sec
= htab
->stub_group
[section
->id
].link_sec
;
2945 return _bfd_aarch64_get_stub_for_link_section (link_sec
, htab
);
2949 /* Add a new stub entry in the stub group associated with an input
2950 section to the stub hash. Not all fields of the new stub entry are
2953 static struct elf_aarch64_stub_hash_entry
*
2954 _bfd_aarch64_add_stub_entry_in_group (const char *stub_name
,
2956 struct elf_aarch64_link_hash_table
*htab
)
2960 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2962 link_sec
= htab
->stub_group
[section
->id
].link_sec
;
2963 stub_sec
= _bfd_aarch64_create_or_find_stub_sec (section
, htab
);
2965 /* Enter this entry into the linker stub hash table. */
2966 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
2968 if (stub_entry
== NULL
)
2970 /* xgettext:c-format */
2971 _bfd_error_handler (_("%pB: cannot create stub entry %s"),
2972 section
->owner
, stub_name
);
2976 stub_entry
->stub_sec
= stub_sec
;
2977 stub_entry
->stub_offset
= 0;
2978 stub_entry
->id_sec
= link_sec
;
2983 /* Add a new stub entry in the final stub section to the stub hash.
2984 Not all fields of the new stub entry are initialised. */
2986 static struct elf_aarch64_stub_hash_entry
*
2987 _bfd_aarch64_add_stub_entry_after (const char *stub_name
,
2988 asection
*link_section
,
2989 struct elf_aarch64_link_hash_table
*htab
)
2992 struct elf_aarch64_stub_hash_entry
*stub_entry
;
2994 stub_sec
= _bfd_aarch64_get_stub_for_link_section (link_section
, htab
);
2995 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
2997 if (stub_entry
== NULL
)
2999 _bfd_error_handler (_("cannot create stub entry %s"), stub_name
);
3003 stub_entry
->stub_sec
= stub_sec
;
3004 stub_entry
->stub_offset
= 0;
3005 stub_entry
->id_sec
= link_section
;
3012 aarch64_build_one_stub (struct bfd_hash_entry
*gen_entry
,
3013 void *in_arg ATTRIBUTE_UNUSED
)
3015 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3020 bfd_vma veneered_insn_loc
;
3021 bfd_vma veneer_entry_loc
;
3022 bfd_signed_vma branch_offset
= 0;
3023 unsigned int template_size
;
3024 const uint32_t *template;
3027 /* Massage our args to the form they really have. */
3028 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
3030 stub_sec
= stub_entry
->stub_sec
;
3032 /* Make a note of the offset within the stubs for this entry. */
3033 stub_entry
->stub_offset
= stub_sec
->size
;
3034 loc
= stub_sec
->contents
+ stub_entry
->stub_offset
;
3036 stub_bfd
= stub_sec
->owner
;
3038 /* This is the address of the stub destination. */
3039 sym_value
= (stub_entry
->target_value
3040 + stub_entry
->target_section
->output_offset
3041 + stub_entry
->target_section
->output_section
->vma
);
3043 if (stub_entry
->stub_type
== aarch64_stub_long_branch
)
3045 bfd_vma place
= (stub_entry
->stub_offset
+ stub_sec
->output_section
->vma
3046 + stub_sec
->output_offset
);
3048 /* See if we can relax the stub. */
3049 if (aarch64_valid_for_adrp_p (sym_value
, place
))
3050 stub_entry
->stub_type
= aarch64_select_branch_stub (sym_value
, place
);
3053 switch (stub_entry
->stub_type
)
3055 case aarch64_stub_adrp_branch
:
3056 template = aarch64_adrp_branch_stub
;
3057 template_size
= sizeof (aarch64_adrp_branch_stub
);
3059 case aarch64_stub_long_branch
:
3060 template = aarch64_long_branch_stub
;
3061 template_size
= sizeof (aarch64_long_branch_stub
);
3063 case aarch64_stub_erratum_835769_veneer
:
3064 template = aarch64_erratum_835769_stub
;
3065 template_size
= sizeof (aarch64_erratum_835769_stub
);
3067 case aarch64_stub_erratum_843419_veneer
:
3068 template = aarch64_erratum_843419_stub
;
3069 template_size
= sizeof (aarch64_erratum_843419_stub
);
3075 for (i
= 0; i
< (template_size
/ sizeof template[0]); i
++)
3077 bfd_putl32 (template[i
], loc
);
3081 template_size
= (template_size
+ 7) & ~7;
3082 stub_sec
->size
+= template_size
;
3084 switch (stub_entry
->stub_type
)
3086 case aarch64_stub_adrp_branch
:
3087 if (!aarch64_relocate (AARCH64_R (ADR_PREL_PG_HI21
), stub_bfd
, stub_sec
,
3088 stub_entry
->stub_offset
, sym_value
))
3089 /* The stub would not have been relaxed if the offset was out
3093 if (!aarch64_relocate (AARCH64_R (ADD_ABS_LO12_NC
), stub_bfd
, stub_sec
,
3094 stub_entry
->stub_offset
+ 4, sym_value
))
3098 case aarch64_stub_long_branch
:
3099 /* We want the value relative to the address 12 bytes back from the
3101 if (!aarch64_relocate (AARCH64_R (PRELNN
), stub_bfd
, stub_sec
,
3102 stub_entry
->stub_offset
+ 16, sym_value
+ 12))
3106 case aarch64_stub_erratum_835769_veneer
:
3107 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
3108 + stub_entry
->target_section
->output_offset
3109 + stub_entry
->target_value
;
3110 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
3111 + stub_entry
->stub_sec
->output_offset
3112 + stub_entry
->stub_offset
;
3113 branch_offset
= veneered_insn_loc
- veneer_entry_loc
;
3114 branch_offset
>>= 2;
3115 branch_offset
&= 0x3ffffff;
3116 bfd_putl32 (stub_entry
->veneered_insn
,
3117 stub_sec
->contents
+ stub_entry
->stub_offset
);
3118 bfd_putl32 (template[1] | branch_offset
,
3119 stub_sec
->contents
+ stub_entry
->stub_offset
+ 4);
3122 case aarch64_stub_erratum_843419_veneer
:
3123 if (!aarch64_relocate (AARCH64_R (JUMP26
), stub_bfd
, stub_sec
,
3124 stub_entry
->stub_offset
+ 4, sym_value
+ 4))
3135 /* As above, but don't actually build the stub. Just bump offset so
3136 we know stub section sizes. */
3139 aarch64_size_one_stub (struct bfd_hash_entry
*gen_entry
,
3140 void *in_arg ATTRIBUTE_UNUSED
)
3142 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3145 /* Massage our args to the form they really have. */
3146 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
3148 switch (stub_entry
->stub_type
)
3150 case aarch64_stub_adrp_branch
:
3151 size
= sizeof (aarch64_adrp_branch_stub
);
3153 case aarch64_stub_long_branch
:
3154 size
= sizeof (aarch64_long_branch_stub
);
3156 case aarch64_stub_erratum_835769_veneer
:
3157 size
= sizeof (aarch64_erratum_835769_stub
);
3159 case aarch64_stub_erratum_843419_veneer
:
3160 size
= sizeof (aarch64_erratum_843419_stub
);
3166 size
= (size
+ 7) & ~7;
3167 stub_entry
->stub_sec
->size
+= size
;
3171 /* External entry points for sizing and building linker stubs. */
3173 /* Set up various things so that we can make a list of input sections
3174 for each output section included in the link. Returns -1 on error,
3175 0 when no stubs will be needed, and 1 on success. */
3178 elfNN_aarch64_setup_section_lists (bfd
*output_bfd
,
3179 struct bfd_link_info
*info
)
3182 unsigned int bfd_count
;
3183 unsigned int top_id
, top_index
;
3185 asection
**input_list
, **list
;
3187 struct elf_aarch64_link_hash_table
*htab
=
3188 elf_aarch64_hash_table (info
);
3190 if (!is_elf_hash_table (htab
))
3193 /* Count the number of input BFDs and find the top input section id. */
3194 for (input_bfd
= info
->input_bfds
, bfd_count
= 0, top_id
= 0;
3195 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
3198 for (section
= input_bfd
->sections
;
3199 section
!= NULL
; section
= section
->next
)
3201 if (top_id
< section
->id
)
3202 top_id
= section
->id
;
3205 htab
->bfd_count
= bfd_count
;
3207 amt
= sizeof (struct map_stub
) * (top_id
+ 1);
3208 htab
->stub_group
= bfd_zmalloc (amt
);
3209 if (htab
->stub_group
== NULL
)
3212 /* We can't use output_bfd->section_count here to find the top output
3213 section index as some sections may have been removed, and
3214 _bfd_strip_section_from_output doesn't renumber the indices. */
3215 for (section
= output_bfd
->sections
, top_index
= 0;
3216 section
!= NULL
; section
= section
->next
)
3218 if (top_index
< section
->index
)
3219 top_index
= section
->index
;
3222 htab
->top_index
= top_index
;
3223 amt
= sizeof (asection
*) * (top_index
+ 1);
3224 input_list
= bfd_malloc (amt
);
3225 htab
->input_list
= input_list
;
3226 if (input_list
== NULL
)
3229 /* For sections we aren't interested in, mark their entries with a
3230 value we can check later. */
3231 list
= input_list
+ top_index
;
3233 *list
= bfd_abs_section_ptr
;
3234 while (list
-- != input_list
);
3236 for (section
= output_bfd
->sections
;
3237 section
!= NULL
; section
= section
->next
)
3239 if ((section
->flags
& SEC_CODE
) != 0)
3240 input_list
[section
->index
] = NULL
;
3246 /* Used by elfNN_aarch64_next_input_section and group_sections. */
3247 #define PREV_SEC(sec) (htab->stub_group[(sec)->id].link_sec)
3249 /* The linker repeatedly calls this function for each input section,
3250 in the order that input sections are linked into output sections.
3251 Build lists of input sections to determine groupings between which
3252 we may insert linker stubs. */
3255 elfNN_aarch64_next_input_section (struct bfd_link_info
*info
, asection
*isec
)
3257 struct elf_aarch64_link_hash_table
*htab
=
3258 elf_aarch64_hash_table (info
);
3260 if (isec
->output_section
->index
<= htab
->top_index
)
3262 asection
**list
= htab
->input_list
+ isec
->output_section
->index
;
3264 if (*list
!= bfd_abs_section_ptr
)
3266 /* Steal the link_sec pointer for our list. */
3267 /* This happens to make the list in reverse order,
3268 which is what we want. */
3269 PREV_SEC (isec
) = *list
;
3275 /* See whether we can group stub sections together. Grouping stub
3276 sections may result in fewer stubs. More importantly, we need to
3277 put all .init* and .fini* stubs at the beginning of the .init or
3278 .fini output sections respectively, because glibc splits the
3279 _init and _fini functions into multiple parts. Putting a stub in
3280 the middle of a function is not a good idea. */
3283 group_sections (struct elf_aarch64_link_hash_table
*htab
,
3284 bfd_size_type stub_group_size
,
3285 bfd_boolean stubs_always_before_branch
)
3287 asection
**list
= htab
->input_list
+ htab
->top_index
;
3291 asection
*tail
= *list
;
3293 if (tail
== bfd_abs_section_ptr
)
3296 while (tail
!= NULL
)
3300 bfd_size_type total
;
3304 while ((prev
= PREV_SEC (curr
)) != NULL
3305 && ((total
+= curr
->output_offset
- prev
->output_offset
)
3309 /* OK, the size from the start of CURR to the end is less
3310 than stub_group_size and thus can be handled by one stub
3311 section. (Or the tail section is itself larger than
3312 stub_group_size, in which case we may be toast.)
3313 We should really be keeping track of the total size of
3314 stubs added here, as stubs contribute to the final output
3318 prev
= PREV_SEC (tail
);
3319 /* Set up this stub group. */
3320 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3322 while (tail
!= curr
&& (tail
= prev
) != NULL
);
3324 /* But wait, there's more! Input sections up to stub_group_size
3325 bytes before the stub section can be handled by it too. */
3326 if (!stubs_always_before_branch
)
3330 && ((total
+= tail
->output_offset
- prev
->output_offset
)
3334 prev
= PREV_SEC (tail
);
3335 htab
->stub_group
[tail
->id
].link_sec
= curr
;
3341 while (list
-- != htab
->input_list
);
3343 free (htab
->input_list
);
3348 #define AARCH64_BITS(x, pos, n) (((x) >> (pos)) & ((1 << (n)) - 1))
3350 #define AARCH64_RT(insn) AARCH64_BITS (insn, 0, 5)
3351 #define AARCH64_RT2(insn) AARCH64_BITS (insn, 10, 5)
3352 #define AARCH64_RA(insn) AARCH64_BITS (insn, 10, 5)
3353 #define AARCH64_RD(insn) AARCH64_BITS (insn, 0, 5)
3354 #define AARCH64_RN(insn) AARCH64_BITS (insn, 5, 5)
3355 #define AARCH64_RM(insn) AARCH64_BITS (insn, 16, 5)
3357 #define AARCH64_MAC(insn) (((insn) & 0xff000000) == 0x9b000000)
3358 #define AARCH64_BIT(insn, n) AARCH64_BITS (insn, n, 1)
3359 #define AARCH64_OP31(insn) AARCH64_BITS (insn, 21, 3)
3360 #define AARCH64_ZR 0x1f
3362 /* All ld/st ops. See C4-182 of the ARM ARM. The encoding space for
3363 LD_PCREL, LDST_RO, LDST_UI and LDST_UIMM cover prefetch ops. */
3365 #define AARCH64_LD(insn) (AARCH64_BIT (insn, 22) == 1)
3366 #define AARCH64_LDST(insn) (((insn) & 0x0a000000) == 0x08000000)
3367 #define AARCH64_LDST_EX(insn) (((insn) & 0x3f000000) == 0x08000000)
3368 #define AARCH64_LDST_PCREL(insn) (((insn) & 0x3b000000) == 0x18000000)
3369 #define AARCH64_LDST_NAP(insn) (((insn) & 0x3b800000) == 0x28000000)
3370 #define AARCH64_LDSTP_PI(insn) (((insn) & 0x3b800000) == 0x28800000)
3371 #define AARCH64_LDSTP_O(insn) (((insn) & 0x3b800000) == 0x29000000)
3372 #define AARCH64_LDSTP_PRE(insn) (((insn) & 0x3b800000) == 0x29800000)
3373 #define AARCH64_LDST_UI(insn) (((insn) & 0x3b200c00) == 0x38000000)
3374 #define AARCH64_LDST_PIIMM(insn) (((insn) & 0x3b200c00) == 0x38000400)
3375 #define AARCH64_LDST_U(insn) (((insn) & 0x3b200c00) == 0x38000800)
3376 #define AARCH64_LDST_PREIMM(insn) (((insn) & 0x3b200c00) == 0x38000c00)
3377 #define AARCH64_LDST_RO(insn) (((insn) & 0x3b200c00) == 0x38200800)
3378 #define AARCH64_LDST_UIMM(insn) (((insn) & 0x3b000000) == 0x39000000)
3379 #define AARCH64_LDST_SIMD_M(insn) (((insn) & 0xbfbf0000) == 0x0c000000)
3380 #define AARCH64_LDST_SIMD_M_PI(insn) (((insn) & 0xbfa00000) == 0x0c800000)
3381 #define AARCH64_LDST_SIMD_S(insn) (((insn) & 0xbf9f0000) == 0x0d000000)
3382 #define AARCH64_LDST_SIMD_S_PI(insn) (((insn) & 0xbf800000) == 0x0d800000)
3384 /* Classify an INSN if it is indeed a load/store.
3386 Return TRUE if INSN is a LD/ST instruction otherwise return FALSE.
3388 For scalar LD/ST instructions PAIR is FALSE, RT is returned and RT2
3391 For LD/ST pair instructions PAIR is TRUE, RT and RT2 are returned. */
3394 aarch64_mem_op_p (uint32_t insn
, unsigned int *rt
, unsigned int *rt2
,
3395 bfd_boolean
*pair
, bfd_boolean
*load
)
3403 /* Bail out quickly if INSN doesn't fall into the load-store
3405 if (!AARCH64_LDST (insn
))
3410 if (AARCH64_LDST_EX (insn
))
3412 *rt
= AARCH64_RT (insn
);
3414 if (AARCH64_BIT (insn
, 21) == 1)
3417 *rt2
= AARCH64_RT2 (insn
);
3419 *load
= AARCH64_LD (insn
);
3422 else if (AARCH64_LDST_NAP (insn
)
3423 || AARCH64_LDSTP_PI (insn
)
3424 || AARCH64_LDSTP_O (insn
)
3425 || AARCH64_LDSTP_PRE (insn
))
3428 *rt
= AARCH64_RT (insn
);
3429 *rt2
= AARCH64_RT2 (insn
);
3430 *load
= AARCH64_LD (insn
);
3433 else if (AARCH64_LDST_PCREL (insn
)
3434 || AARCH64_LDST_UI (insn
)
3435 || AARCH64_LDST_PIIMM (insn
)
3436 || AARCH64_LDST_U (insn
)
3437 || AARCH64_LDST_PREIMM (insn
)
3438 || AARCH64_LDST_RO (insn
)
3439 || AARCH64_LDST_UIMM (insn
))
3441 *rt
= AARCH64_RT (insn
);
3443 if (AARCH64_LDST_PCREL (insn
))
3445 opc
= AARCH64_BITS (insn
, 22, 2);
3446 v
= AARCH64_BIT (insn
, 26);
3447 opc_v
= opc
| (v
<< 2);
3448 *load
= (opc_v
== 1 || opc_v
== 2 || opc_v
== 3
3449 || opc_v
== 5 || opc_v
== 7);
3452 else if (AARCH64_LDST_SIMD_M (insn
)
3453 || AARCH64_LDST_SIMD_M_PI (insn
))
3455 *rt
= AARCH64_RT (insn
);
3456 *load
= AARCH64_BIT (insn
, 22);
3457 opcode
= (insn
>> 12) & 0xf;
3484 else if (AARCH64_LDST_SIMD_S (insn
)
3485 || AARCH64_LDST_SIMD_S_PI (insn
))
3487 *rt
= AARCH64_RT (insn
);
3488 r
= (insn
>> 21) & 1;
3489 *load
= AARCH64_BIT (insn
, 22);
3490 opcode
= (insn
>> 13) & 0x7;
3502 *rt2
= *rt
+ (r
== 0 ? 2 : 3);
3510 *rt2
= *rt
+ (r
== 0 ? 2 : 3);
3522 /* Return TRUE if INSN is multiply-accumulate. */
3525 aarch64_mlxl_p (uint32_t insn
)
3527 uint32_t op31
= AARCH64_OP31 (insn
);
3529 if (AARCH64_MAC (insn
)
3530 && (op31
== 0 || op31
== 1 || op31
== 5)
3531 /* Exclude MUL instructions which are encoded as a multiple accumulate
3533 && AARCH64_RA (insn
) != AARCH64_ZR
)
3539 /* Some early revisions of the Cortex-A53 have an erratum (835769) whereby
3540 it is possible for a 64-bit multiply-accumulate instruction to generate an
3541 incorrect result. The details are quite complex and hard to
3542 determine statically, since branches in the code may exist in some
3543 circumstances, but all cases end with a memory (load, store, or
3544 prefetch) instruction followed immediately by the multiply-accumulate
3545 operation. We employ a linker patching technique, by moving the potentially
3546 affected multiply-accumulate instruction into a patch region and replacing
3547 the original instruction with a branch to the patch. This function checks
3548 if INSN_1 is the memory operation followed by a multiply-accumulate
3549 operation (INSN_2). Return TRUE if an erratum sequence is found, FALSE
3550 if INSN_1 and INSN_2 are safe. */
3553 aarch64_erratum_sequence (uint32_t insn_1
, uint32_t insn_2
)
3563 if (aarch64_mlxl_p (insn_2
)
3564 && aarch64_mem_op_p (insn_1
, &rt
, &rt2
, &pair
, &load
))
3566 /* Any SIMD memory op is independent of the subsequent MLA
3567 by definition of the erratum. */
3568 if (AARCH64_BIT (insn_1
, 26))
3571 /* If not SIMD, check for integer memory ops and MLA relationship. */
3572 rn
= AARCH64_RN (insn_2
);
3573 ra
= AARCH64_RA (insn_2
);
3574 rm
= AARCH64_RM (insn_2
);
3576 /* If this is a load and there's a true(RAW) dependency, we are safe
3577 and this is not an erratum sequence. */
3579 (rt
== rn
|| rt
== rm
|| rt
== ra
3580 || (pair
&& (rt2
== rn
|| rt2
== rm
|| rt2
== ra
))))
3583 /* We conservatively put out stubs for all other cases (including
3591 /* Used to order a list of mapping symbols by address. */
3594 elf_aarch64_compare_mapping (const void *a
, const void *b
)
3596 const elf_aarch64_section_map
*amap
= (const elf_aarch64_section_map
*) a
;
3597 const elf_aarch64_section_map
*bmap
= (const elf_aarch64_section_map
*) b
;
3599 if (amap
->vma
> bmap
->vma
)
3601 else if (amap
->vma
< bmap
->vma
)
3603 else if (amap
->type
> bmap
->type
)
3604 /* Ensure results do not depend on the host qsort for objects with
3605 multiple mapping symbols at the same address by sorting on type
3608 else if (amap
->type
< bmap
->type
)
3616 _bfd_aarch64_erratum_835769_stub_name (unsigned num_fixes
)
3618 char *stub_name
= (char *) bfd_malloc
3619 (strlen ("__erratum_835769_veneer_") + 16);
3620 sprintf (stub_name
,"__erratum_835769_veneer_%d", num_fixes
);
3624 /* Scan for Cortex-A53 erratum 835769 sequence.
3626 Return TRUE else FALSE on abnormal termination. */
3629 _bfd_aarch64_erratum_835769_scan (bfd
*input_bfd
,
3630 struct bfd_link_info
*info
,
3631 unsigned int *num_fixes_p
)
3634 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3635 unsigned int num_fixes
= *num_fixes_p
;
3640 for (section
= input_bfd
->sections
;
3642 section
= section
->next
)
3644 bfd_byte
*contents
= NULL
;
3645 struct _aarch64_elf_section_data
*sec_data
;
3648 if (elf_section_type (section
) != SHT_PROGBITS
3649 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
3650 || (section
->flags
& SEC_EXCLUDE
) != 0
3651 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3652 || (section
->output_section
== bfd_abs_section_ptr
))
3655 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
3656 contents
= elf_section_data (section
)->this_hdr
.contents
;
3657 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
3660 sec_data
= elf_aarch64_section_data (section
);
3662 qsort (sec_data
->map
, sec_data
->mapcount
,
3663 sizeof (elf_aarch64_section_map
), elf_aarch64_compare_mapping
);
3665 for (span
= 0; span
< sec_data
->mapcount
; span
++)
3667 unsigned int span_start
= sec_data
->map
[span
].vma
;
3668 unsigned int span_end
= ((span
== sec_data
->mapcount
- 1)
3669 ? sec_data
->map
[0].vma
+ section
->size
3670 : sec_data
->map
[span
+ 1].vma
);
3672 char span_type
= sec_data
->map
[span
].type
;
3674 if (span_type
== 'd')
3677 for (i
= span_start
; i
+ 4 < span_end
; i
+= 4)
3679 uint32_t insn_1
= bfd_getl32 (contents
+ i
);
3680 uint32_t insn_2
= bfd_getl32 (contents
+ i
+ 4);
3682 if (aarch64_erratum_sequence (insn_1
, insn_2
))
3684 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3685 char *stub_name
= _bfd_aarch64_erratum_835769_stub_name (num_fixes
);
3689 stub_entry
= _bfd_aarch64_add_stub_entry_in_group (stub_name
,
3695 stub_entry
->stub_type
= aarch64_stub_erratum_835769_veneer
;
3696 stub_entry
->target_section
= section
;
3697 stub_entry
->target_value
= i
+ 4;
3698 stub_entry
->veneered_insn
= insn_2
;
3699 stub_entry
->output_name
= stub_name
;
3704 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
3708 *num_fixes_p
= num_fixes
;
3714 /* Test if instruction INSN is ADRP. */
3717 _bfd_aarch64_adrp_p (uint32_t insn
)
3719 return ((insn
& 0x9f000000) == 0x90000000);
3723 /* Helper predicate to look for cortex-a53 erratum 843419 sequence 1. */
3726 _bfd_aarch64_erratum_843419_sequence_p (uint32_t insn_1
, uint32_t insn_2
,
3734 return (aarch64_mem_op_p (insn_2
, &rt
, &rt2
, &pair
, &load
)
3737 && AARCH64_LDST_UIMM (insn_3
)
3738 && AARCH64_RN (insn_3
) == AARCH64_RD (insn_1
));
3742 /* Test for the presence of Cortex-A53 erratum 843419 instruction sequence.
3744 Return TRUE if section CONTENTS at offset I contains one of the
3745 erratum 843419 sequences, otherwise return FALSE. If a sequence is
3746 seen set P_VENEER_I to the offset of the final LOAD/STORE
3747 instruction in the sequence.
3751 _bfd_aarch64_erratum_843419_p (bfd_byte
*contents
, bfd_vma vma
,
3752 bfd_vma i
, bfd_vma span_end
,
3753 bfd_vma
*p_veneer_i
)
3755 uint32_t insn_1
= bfd_getl32 (contents
+ i
);
3757 if (!_bfd_aarch64_adrp_p (insn_1
))
3760 if (span_end
< i
+ 12)
3763 uint32_t insn_2
= bfd_getl32 (contents
+ i
+ 4);
3764 uint32_t insn_3
= bfd_getl32 (contents
+ i
+ 8);
3766 if ((vma
& 0xfff) != 0xff8 && (vma
& 0xfff) != 0xffc)
3769 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1
, insn_2
, insn_3
))
3771 *p_veneer_i
= i
+ 8;
3775 if (span_end
< i
+ 16)
3778 uint32_t insn_4
= bfd_getl32 (contents
+ i
+ 12);
3780 if (_bfd_aarch64_erratum_843419_sequence_p (insn_1
, insn_2
, insn_4
))
3782 *p_veneer_i
= i
+ 12;
3790 /* Resize all stub sections. */
3793 _bfd_aarch64_resize_stubs (struct elf_aarch64_link_hash_table
*htab
)
3797 /* OK, we've added some stubs. Find out the new size of the
3799 for (section
= htab
->stub_bfd
->sections
;
3800 section
!= NULL
; section
= section
->next
)
3802 /* Ignore non-stub sections. */
3803 if (!strstr (section
->name
, STUB_SUFFIX
))
3808 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_size_one_stub
, htab
);
3810 for (section
= htab
->stub_bfd
->sections
;
3811 section
!= NULL
; section
= section
->next
)
3813 if (!strstr (section
->name
, STUB_SUFFIX
))
3816 /* Add space for a branch. Add 8 bytes to keep section 8 byte aligned,
3817 as long branch stubs contain a 64-bit address. */
3821 /* Ensure all stub sections have a size which is a multiple of
3822 4096. This is important in order to ensure that the insertion
3823 of stub sections does not in itself move existing code around
3824 in such a way that new errata sequences are created. */
3825 if (htab
->fix_erratum_843419
)
3827 section
->size
= BFD_ALIGN (section
->size
, 0x1000);
3831 /* Construct an erratum 843419 workaround stub name. */
3834 _bfd_aarch64_erratum_843419_stub_name (asection
*input_section
,
3837 const bfd_size_type len
= 8 + 4 + 1 + 8 + 1 + 16 + 1;
3838 char *stub_name
= bfd_malloc (len
);
3840 if (stub_name
!= NULL
)
3841 snprintf (stub_name
, len
, "e843419@%04x_%08x_%" BFD_VMA_FMT
"x",
3842 input_section
->owner
->id
,
3848 /* Build a stub_entry structure describing an 843419 fixup.
3850 The stub_entry constructed is populated with the bit pattern INSN
3851 of the instruction located at OFFSET within input SECTION.
3853 Returns TRUE on success. */
3856 _bfd_aarch64_erratum_843419_fixup (uint32_t insn
,
3857 bfd_vma adrp_offset
,
3858 bfd_vma ldst_offset
,
3860 struct bfd_link_info
*info
)
3862 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3864 struct elf_aarch64_stub_hash_entry
*stub_entry
;
3866 stub_name
= _bfd_aarch64_erratum_843419_stub_name (section
, ldst_offset
);
3867 stub_entry
= aarch64_stub_hash_lookup (&htab
->stub_hash_table
, stub_name
,
3875 /* We always place an 843419 workaround veneer in the stub section
3876 attached to the input section in which an erratum sequence has
3877 been found. This ensures that later in the link process (in
3878 elfNN_aarch64_write_section) when we copy the veneered
3879 instruction from the input section into the stub section the
3880 copied instruction will have had any relocations applied to it.
3881 If we placed workaround veneers in any other stub section then we
3882 could not assume that all relocations have been processed on the
3883 corresponding input section at the point we output the stub
3887 stub_entry
= _bfd_aarch64_add_stub_entry_after (stub_name
, section
, htab
);
3888 if (stub_entry
== NULL
)
3894 stub_entry
->adrp_offset
= adrp_offset
;
3895 stub_entry
->target_value
= ldst_offset
;
3896 stub_entry
->target_section
= section
;
3897 stub_entry
->stub_type
= aarch64_stub_erratum_843419_veneer
;
3898 stub_entry
->veneered_insn
= insn
;
3899 stub_entry
->output_name
= stub_name
;
3905 /* Scan an input section looking for the signature of erratum 843419.
3907 Scans input SECTION in INPUT_BFD looking for erratum 843419
3908 signatures, for each signature found a stub_entry is created
3909 describing the location of the erratum for subsequent fixup.
3911 Return TRUE on successful scan, FALSE on failure to scan.
3915 _bfd_aarch64_erratum_843419_scan (bfd
*input_bfd
, asection
*section
,
3916 struct bfd_link_info
*info
)
3918 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
3923 if (elf_section_type (section
) != SHT_PROGBITS
3924 || (elf_section_flags (section
) & SHF_EXECINSTR
) == 0
3925 || (section
->flags
& SEC_EXCLUDE
) != 0
3926 || (section
->sec_info_type
== SEC_INFO_TYPE_JUST_SYMS
)
3927 || (section
->output_section
== bfd_abs_section_ptr
))
3932 bfd_byte
*contents
= NULL
;
3933 struct _aarch64_elf_section_data
*sec_data
;
3936 if (elf_section_data (section
)->this_hdr
.contents
!= NULL
)
3937 contents
= elf_section_data (section
)->this_hdr
.contents
;
3938 else if (! bfd_malloc_and_get_section (input_bfd
, section
, &contents
))
3941 sec_data
= elf_aarch64_section_data (section
);
3943 qsort (sec_data
->map
, sec_data
->mapcount
,
3944 sizeof (elf_aarch64_section_map
), elf_aarch64_compare_mapping
);
3946 for (span
= 0; span
< sec_data
->mapcount
; span
++)
3948 unsigned int span_start
= sec_data
->map
[span
].vma
;
3949 unsigned int span_end
= ((span
== sec_data
->mapcount
- 1)
3950 ? sec_data
->map
[0].vma
+ section
->size
3951 : sec_data
->map
[span
+ 1].vma
);
3953 char span_type
= sec_data
->map
[span
].type
;
3955 if (span_type
== 'd')
3958 for (i
= span_start
; i
+ 8 < span_end
; i
+= 4)
3960 bfd_vma vma
= (section
->output_section
->vma
3961 + section
->output_offset
3965 if (_bfd_aarch64_erratum_843419_p
3966 (contents
, vma
, i
, span_end
, &veneer_i
))
3968 uint32_t insn
= bfd_getl32 (contents
+ veneer_i
);
3970 if (!_bfd_aarch64_erratum_843419_fixup (insn
, i
, veneer_i
,
3977 if (elf_section_data (section
)->this_hdr
.contents
== NULL
)
3986 /* Determine and set the size of the stub section for a final link.
3988 The basic idea here is to examine all the relocations looking for
3989 PC-relative calls to a target that is unreachable with a "bl"
3993 elfNN_aarch64_size_stubs (bfd
*output_bfd
,
3995 struct bfd_link_info
*info
,
3996 bfd_signed_vma group_size
,
3997 asection
* (*add_stub_section
) (const char *,
3999 void (*layout_sections_again
) (void))
4001 bfd_size_type stub_group_size
;
4002 bfd_boolean stubs_always_before_branch
;
4003 bfd_boolean stub_changed
= FALSE
;
4004 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
4005 unsigned int num_erratum_835769_fixes
= 0;
4007 /* Propagate mach to stub bfd, because it may not have been
4008 finalized when we created stub_bfd. */
4009 bfd_set_arch_mach (stub_bfd
, bfd_get_arch (output_bfd
),
4010 bfd_get_mach (output_bfd
));
4012 /* Stash our params away. */
4013 htab
->stub_bfd
= stub_bfd
;
4014 htab
->add_stub_section
= add_stub_section
;
4015 htab
->layout_sections_again
= layout_sections_again
;
4016 stubs_always_before_branch
= group_size
< 0;
4018 stub_group_size
= -group_size
;
4020 stub_group_size
= group_size
;
4022 if (stub_group_size
== 1)
4024 /* Default values. */
4025 /* AArch64 branch range is +-128MB. The value used is 1MB less. */
4026 stub_group_size
= 127 * 1024 * 1024;
4029 group_sections (htab
, stub_group_size
, stubs_always_before_branch
);
4031 (*htab
->layout_sections_again
) ();
4033 if (htab
->fix_erratum_835769
)
4037 for (input_bfd
= info
->input_bfds
;
4038 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
4039 if (!_bfd_aarch64_erratum_835769_scan (input_bfd
, info
,
4040 &num_erratum_835769_fixes
))
4043 _bfd_aarch64_resize_stubs (htab
);
4044 (*htab
->layout_sections_again
) ();
4047 if (htab
->fix_erratum_843419
)
4051 for (input_bfd
= info
->input_bfds
;
4053 input_bfd
= input_bfd
->link
.next
)
4057 for (section
= input_bfd
->sections
;
4059 section
= section
->next
)
4060 if (!_bfd_aarch64_erratum_843419_scan (input_bfd
, section
, info
))
4064 _bfd_aarch64_resize_stubs (htab
);
4065 (*htab
->layout_sections_again
) ();
4072 for (input_bfd
= info
->input_bfds
;
4073 input_bfd
!= NULL
; input_bfd
= input_bfd
->link
.next
)
4075 Elf_Internal_Shdr
*symtab_hdr
;
4077 Elf_Internal_Sym
*local_syms
= NULL
;
4079 /* We'll need the symbol table in a second. */
4080 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
4081 if (symtab_hdr
->sh_info
== 0)
4084 /* Walk over each section attached to the input bfd. */
4085 for (section
= input_bfd
->sections
;
4086 section
!= NULL
; section
= section
->next
)
4088 Elf_Internal_Rela
*internal_relocs
, *irelaend
, *irela
;
4090 /* If there aren't any relocs, then there's nothing more
4092 if ((section
->flags
& SEC_RELOC
) == 0
4093 || section
->reloc_count
== 0
4094 || (section
->flags
& SEC_CODE
) == 0)
4097 /* If this section is a link-once section that will be
4098 discarded, then don't create any stubs. */
4099 if (section
->output_section
== NULL
4100 || section
->output_section
->owner
!= output_bfd
)
4103 /* Get the relocs. */
4105 = _bfd_elf_link_read_relocs (input_bfd
, section
, NULL
,
4106 NULL
, info
->keep_memory
);
4107 if (internal_relocs
== NULL
)
4108 goto error_ret_free_local
;
4110 /* Now examine each relocation. */
4111 irela
= internal_relocs
;
4112 irelaend
= irela
+ section
->reloc_count
;
4113 for (; irela
< irelaend
; irela
++)
4115 unsigned int r_type
, r_indx
;
4116 enum elf_aarch64_stub_type stub_type
;
4117 struct elf_aarch64_stub_hash_entry
*stub_entry
;
4120 bfd_vma destination
;
4121 struct elf_aarch64_link_hash_entry
*hash
;
4122 const char *sym_name
;
4124 const asection
*id_sec
;
4125 unsigned char st_type
;
4128 r_type
= ELFNN_R_TYPE (irela
->r_info
);
4129 r_indx
= ELFNN_R_SYM (irela
->r_info
);
4131 if (r_type
>= (unsigned int) R_AARCH64_end
)
4133 bfd_set_error (bfd_error_bad_value
);
4134 error_ret_free_internal
:
4135 if (elf_section_data (section
)->relocs
== NULL
)
4136 free (internal_relocs
);
4137 goto error_ret_free_local
;
4140 /* Only look for stubs on unconditional branch and
4141 branch and link instructions. */
4142 if (r_type
!= (unsigned int) AARCH64_R (CALL26
)
4143 && r_type
!= (unsigned int) AARCH64_R (JUMP26
))
4146 /* Now determine the call target, its name, value,
4153 if (r_indx
< symtab_hdr
->sh_info
)
4155 /* It's a local symbol. */
4156 Elf_Internal_Sym
*sym
;
4157 Elf_Internal_Shdr
*hdr
;
4159 if (local_syms
== NULL
)
4162 = (Elf_Internal_Sym
*) symtab_hdr
->contents
;
4163 if (local_syms
== NULL
)
4165 = bfd_elf_get_elf_syms (input_bfd
, symtab_hdr
,
4166 symtab_hdr
->sh_info
, 0,
4168 if (local_syms
== NULL
)
4169 goto error_ret_free_internal
;
4172 sym
= local_syms
+ r_indx
;
4173 hdr
= elf_elfsections (input_bfd
)[sym
->st_shndx
];
4174 sym_sec
= hdr
->bfd_section
;
4176 /* This is an undefined symbol. It can never
4180 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
4181 sym_value
= sym
->st_value
;
4182 destination
= (sym_value
+ irela
->r_addend
4183 + sym_sec
->output_offset
4184 + sym_sec
->output_section
->vma
);
4185 st_type
= ELF_ST_TYPE (sym
->st_info
);
4187 = bfd_elf_string_from_elf_section (input_bfd
,
4188 symtab_hdr
->sh_link
,
4195 e_indx
= r_indx
- symtab_hdr
->sh_info
;
4196 hash
= ((struct elf_aarch64_link_hash_entry
*)
4197 elf_sym_hashes (input_bfd
)[e_indx
]);
4199 while (hash
->root
.root
.type
== bfd_link_hash_indirect
4200 || hash
->root
.root
.type
== bfd_link_hash_warning
)
4201 hash
= ((struct elf_aarch64_link_hash_entry
*)
4202 hash
->root
.root
.u
.i
.link
);
4204 if (hash
->root
.root
.type
== bfd_link_hash_defined
4205 || hash
->root
.root
.type
== bfd_link_hash_defweak
)
4207 struct elf_aarch64_link_hash_table
*globals
=
4208 elf_aarch64_hash_table (info
);
4209 sym_sec
= hash
->root
.root
.u
.def
.section
;
4210 sym_value
= hash
->root
.root
.u
.def
.value
;
4211 /* For a destination in a shared library,
4212 use the PLT stub as target address to
4213 decide whether a branch stub is
4215 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
4216 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
4218 sym_sec
= globals
->root
.splt
;
4219 sym_value
= hash
->root
.plt
.offset
;
4220 if (sym_sec
->output_section
!= NULL
)
4221 destination
= (sym_value
4222 + sym_sec
->output_offset
4224 sym_sec
->output_section
->vma
);
4226 else if (sym_sec
->output_section
!= NULL
)
4227 destination
= (sym_value
+ irela
->r_addend
4228 + sym_sec
->output_offset
4229 + sym_sec
->output_section
->vma
);
4231 else if (hash
->root
.root
.type
== bfd_link_hash_undefined
4232 || (hash
->root
.root
.type
4233 == bfd_link_hash_undefweak
))
4235 /* For a shared library, use the PLT stub as
4236 target address to decide whether a long
4237 branch stub is needed.
4238 For absolute code, they cannot be handled. */
4239 struct elf_aarch64_link_hash_table
*globals
=
4240 elf_aarch64_hash_table (info
);
4242 if (globals
->root
.splt
!= NULL
&& hash
!= NULL
4243 && hash
->root
.plt
.offset
!= (bfd_vma
) - 1)
4245 sym_sec
= globals
->root
.splt
;
4246 sym_value
= hash
->root
.plt
.offset
;
4247 if (sym_sec
->output_section
!= NULL
)
4248 destination
= (sym_value
4249 + sym_sec
->output_offset
4251 sym_sec
->output_section
->vma
);
4258 bfd_set_error (bfd_error_bad_value
);
4259 goto error_ret_free_internal
;
4261 st_type
= ELF_ST_TYPE (hash
->root
.type
);
4262 sym_name
= hash
->root
.root
.root
.string
;
4265 /* Determine what (if any) linker stub is needed. */
4266 stub_type
= aarch64_type_of_stub (section
, irela
, sym_sec
,
4267 st_type
, destination
);
4268 if (stub_type
== aarch64_stub_none
)
4271 /* Support for grouping stub sections. */
4272 id_sec
= htab
->stub_group
[section
->id
].link_sec
;
4274 /* Get the name of this stub. */
4275 stub_name
= elfNN_aarch64_stub_name (id_sec
, sym_sec
, hash
,
4278 goto error_ret_free_internal
;
4281 aarch64_stub_hash_lookup (&htab
->stub_hash_table
,
4282 stub_name
, FALSE
, FALSE
);
4283 if (stub_entry
!= NULL
)
4285 /* The proper stub has already been created. */
4290 stub_entry
= _bfd_aarch64_add_stub_entry_in_group
4291 (stub_name
, section
, htab
);
4292 if (stub_entry
== NULL
)
4295 goto error_ret_free_internal
;
4298 stub_entry
->target_value
= sym_value
+ irela
->r_addend
;
4299 stub_entry
->target_section
= sym_sec
;
4300 stub_entry
->stub_type
= stub_type
;
4301 stub_entry
->h
= hash
;
4302 stub_entry
->st_type
= st_type
;
4304 if (sym_name
== NULL
)
4305 sym_name
= "unnamed";
4306 len
= sizeof (STUB_ENTRY_NAME
) + strlen (sym_name
);
4307 stub_entry
->output_name
= bfd_alloc (htab
->stub_bfd
, len
);
4308 if (stub_entry
->output_name
== NULL
)
4311 goto error_ret_free_internal
;
4314 snprintf (stub_entry
->output_name
, len
, STUB_ENTRY_NAME
,
4317 stub_changed
= TRUE
;
4320 /* We're done with the internal relocs, free them. */
4321 if (elf_section_data (section
)->relocs
== NULL
)
4322 free (internal_relocs
);
4329 _bfd_aarch64_resize_stubs (htab
);
4331 /* Ask the linker to do its stuff. */
4332 (*htab
->layout_sections_again
) ();
4333 stub_changed
= FALSE
;
4338 error_ret_free_local
:
4342 /* Build all the stubs associated with the current output file. The
4343 stubs are kept in a hash table attached to the main linker hash
4344 table. We also set up the .plt entries for statically linked PIC
4345 functions here. This function is called via aarch64_elf_finish in the
4349 elfNN_aarch64_build_stubs (struct bfd_link_info
*info
)
4352 struct bfd_hash_table
*table
;
4353 struct elf_aarch64_link_hash_table
*htab
;
4355 htab
= elf_aarch64_hash_table (info
);
4357 for (stub_sec
= htab
->stub_bfd
->sections
;
4358 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
4362 /* Ignore non-stub sections. */
4363 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
4366 /* Allocate memory to hold the linker stubs. */
4367 size
= stub_sec
->size
;
4368 stub_sec
->contents
= bfd_zalloc (htab
->stub_bfd
, size
);
4369 if (stub_sec
->contents
== NULL
&& size
!= 0)
4373 /* Add a branch around the stub section, and a nop, to keep it 8 byte
4374 aligned, as long branch stubs contain a 64-bit address. */
4375 bfd_putl32 (0x14000000 | (size
>> 2), stub_sec
->contents
);
4376 bfd_putl32 (INSN_NOP
, stub_sec
->contents
+ 4);
4377 stub_sec
->size
+= 8;
4380 /* Build the stubs as directed by the stub hash table. */
4381 table
= &htab
->stub_hash_table
;
4382 bfd_hash_traverse (table
, aarch64_build_one_stub
, info
);
4388 /* Add an entry to the code/data map for section SEC. */
4391 elfNN_aarch64_section_map_add (asection
*sec
, char type
, bfd_vma vma
)
4393 struct _aarch64_elf_section_data
*sec_data
=
4394 elf_aarch64_section_data (sec
);
4395 unsigned int newidx
;
4397 if (sec_data
->map
== NULL
)
4399 sec_data
->map
= bfd_malloc (sizeof (elf_aarch64_section_map
));
4400 sec_data
->mapcount
= 0;
4401 sec_data
->mapsize
= 1;
4404 newidx
= sec_data
->mapcount
++;
4406 if (sec_data
->mapcount
> sec_data
->mapsize
)
4408 sec_data
->mapsize
*= 2;
4409 sec_data
->map
= bfd_realloc_or_free
4410 (sec_data
->map
, sec_data
->mapsize
* sizeof (elf_aarch64_section_map
));
4415 sec_data
->map
[newidx
].vma
= vma
;
4416 sec_data
->map
[newidx
].type
= type
;
4421 /* Initialise maps of insn/data for input BFDs. */
4423 bfd_elfNN_aarch64_init_maps (bfd
*abfd
)
4425 Elf_Internal_Sym
*isymbuf
;
4426 Elf_Internal_Shdr
*hdr
;
4427 unsigned int i
, localsyms
;
4429 /* Make sure that we are dealing with an AArch64 elf binary. */
4430 if (!is_aarch64_elf (abfd
))
4433 if ((abfd
->flags
& DYNAMIC
) != 0)
4436 hdr
= &elf_symtab_hdr (abfd
);
4437 localsyms
= hdr
->sh_info
;
4439 /* Obtain a buffer full of symbols for this BFD. The hdr->sh_info field
4440 should contain the number of local symbols, which should come before any
4441 global symbols. Mapping symbols are always local. */
4442 isymbuf
= bfd_elf_get_elf_syms (abfd
, hdr
, localsyms
, 0, NULL
, NULL
, NULL
);
4444 /* No internal symbols read? Skip this BFD. */
4445 if (isymbuf
== NULL
)
4448 for (i
= 0; i
< localsyms
; i
++)
4450 Elf_Internal_Sym
*isym
= &isymbuf
[i
];
4451 asection
*sec
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
4454 if (sec
!= NULL
&& ELF_ST_BIND (isym
->st_info
) == STB_LOCAL
)
4456 name
= bfd_elf_string_from_elf_section (abfd
,
4460 if (bfd_is_aarch64_special_symbol_name
4461 (name
, BFD_AARCH64_SPECIAL_SYM_TYPE_MAP
))
4462 elfNN_aarch64_section_map_add (sec
, name
[1], isym
->st_value
);
4467 /* Set option values needed during linking. */
4469 bfd_elfNN_aarch64_set_options (struct bfd
*output_bfd
,
4470 struct bfd_link_info
*link_info
,
4472 int no_wchar_warn
, int pic_veneer
,
4473 int fix_erratum_835769
,
4474 int fix_erratum_843419
,
4475 int no_apply_dynamic_relocs
)
4477 struct elf_aarch64_link_hash_table
*globals
;
4479 globals
= elf_aarch64_hash_table (link_info
);
4480 globals
->pic_veneer
= pic_veneer
;
4481 globals
->fix_erratum_835769
= fix_erratum_835769
;
4482 globals
->fix_erratum_843419
= fix_erratum_843419
;
4483 globals
->fix_erratum_843419_adr
= TRUE
;
4484 globals
->no_apply_dynamic_relocs
= no_apply_dynamic_relocs
;
4486 BFD_ASSERT (is_aarch64_elf (output_bfd
));
4487 elf_aarch64_tdata (output_bfd
)->no_enum_size_warning
= no_enum_warn
;
4488 elf_aarch64_tdata (output_bfd
)->no_wchar_size_warning
= no_wchar_warn
;
4492 aarch64_calculate_got_entry_vma (struct elf_link_hash_entry
*h
,
4493 struct elf_aarch64_link_hash_table
4494 *globals
, struct bfd_link_info
*info
,
4495 bfd_vma value
, bfd
*output_bfd
,
4496 bfd_boolean
*unresolved_reloc_p
)
4498 bfd_vma off
= (bfd_vma
) - 1;
4499 asection
*basegot
= globals
->root
.sgot
;
4500 bfd_boolean dyn
= globals
->root
.dynamic_sections_created
;
4504 BFD_ASSERT (basegot
!= NULL
);
4505 off
= h
->got
.offset
;
4506 BFD_ASSERT (off
!= (bfd_vma
) - 1);
4507 if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, bfd_link_pic (info
), h
)
4508 || (bfd_link_pic (info
)
4509 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4510 || (ELF_ST_VISIBILITY (h
->other
)
4511 && h
->root
.type
== bfd_link_hash_undefweak
))
4513 /* This is actually a static link, or it is a -Bsymbolic link
4514 and the symbol is defined locally. We must initialize this
4515 entry in the global offset table. Since the offset must
4516 always be a multiple of 8 (4 in the case of ILP32), we use
4517 the least significant bit to record whether we have
4518 initialized it already.
4519 When doing a dynamic link, we create a .rel(a).got relocation
4520 entry to initialize the value. This is done in the
4521 finish_dynamic_symbol routine. */
4526 bfd_put_NN (output_bfd
, value
, basegot
->contents
+ off
);
4531 *unresolved_reloc_p
= FALSE
;
4533 off
= off
+ basegot
->output_section
->vma
+ basegot
->output_offset
;
4539 /* Change R_TYPE to a more efficient access model where possible,
4540 return the new reloc type. */
4542 static bfd_reloc_code_real_type
4543 aarch64_tls_transition_without_check (bfd_reloc_code_real_type r_type
,
4544 struct elf_link_hash_entry
*h
)
4546 bfd_boolean is_local
= h
== NULL
;
4550 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
4551 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4553 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4554 : BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
);
4556 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
4558 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4561 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
4563 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
4564 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
4566 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
4568 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4569 : BFD_RELOC_AARCH64_NONE
);
4571 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
4573 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4574 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
);
4576 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
4578 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4579 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
);
4581 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
4582 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4584 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
4585 : BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
);
4587 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4588 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
: r_type
;
4590 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
4591 return is_local
? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
: r_type
;
4593 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4596 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4598 ? BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
4599 : BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
);
4601 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
4602 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
4603 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
4604 /* Instructions with these relocations will become NOPs. */
4605 return BFD_RELOC_AARCH64_NONE
;
4607 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
4608 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
4609 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
4610 return is_local
? BFD_RELOC_AARCH64_NONE
: r_type
;
4613 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
4615 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
4616 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
;
4618 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
4620 ? BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
4621 : BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
;
4632 aarch64_reloc_got_type (bfd_reloc_code_real_type r_type
)
4636 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
4637 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
4638 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
4639 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
4640 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
4641 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
4642 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
4643 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
4644 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
4647 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
4648 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
4649 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
4650 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
4651 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
4652 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
4653 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
4654 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
4657 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
4658 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
4659 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
4660 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
4661 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
4662 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
4663 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
4664 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
4665 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
4666 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
4667 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
4668 return GOT_TLSDESC_GD
;
4670 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
4671 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
4672 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
4673 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
4674 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
4675 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
4685 aarch64_can_relax_tls (bfd
*input_bfd
,
4686 struct bfd_link_info
*info
,
4687 bfd_reloc_code_real_type r_type
,
4688 struct elf_link_hash_entry
*h
,
4689 unsigned long r_symndx
)
4691 unsigned int symbol_got_type
;
4692 unsigned int reloc_got_type
;
4694 if (! IS_AARCH64_TLS_RELAX_RELOC (r_type
))
4697 symbol_got_type
= elfNN_aarch64_symbol_got_type (h
, input_bfd
, r_symndx
);
4698 reloc_got_type
= aarch64_reloc_got_type (r_type
);
4700 if (symbol_got_type
== GOT_TLS_IE
&& GOT_TLS_GD_ANY_P (reloc_got_type
))
4703 if (!bfd_link_executable (info
))
4706 if (h
&& h
->root
.type
== bfd_link_hash_undefweak
)
4712 /* Given the relocation code R_TYPE, return the relaxed bfd reloc
4715 static bfd_reloc_code_real_type
4716 aarch64_tls_transition (bfd
*input_bfd
,
4717 struct bfd_link_info
*info
,
4718 unsigned int r_type
,
4719 struct elf_link_hash_entry
*h
,
4720 unsigned long r_symndx
)
4722 bfd_reloc_code_real_type bfd_r_type
4723 = elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
4725 if (! aarch64_can_relax_tls (input_bfd
, info
, bfd_r_type
, h
, r_symndx
))
4728 return aarch64_tls_transition_without_check (bfd_r_type
, h
);
4731 /* Return the base VMA address which should be subtracted from real addresses
4732 when resolving R_AARCH64_TLS_DTPREL relocation. */
4735 dtpoff_base (struct bfd_link_info
*info
)
4737 /* If tls_sec is NULL, we should have signalled an error already. */
4738 BFD_ASSERT (elf_hash_table (info
)->tls_sec
!= NULL
);
4739 return elf_hash_table (info
)->tls_sec
->vma
;
4742 /* Return the base VMA address which should be subtracted from real addresses
4743 when resolving R_AARCH64_TLS_GOTTPREL64 relocations. */
4746 tpoff_base (struct bfd_link_info
*info
)
4748 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
4750 /* If tls_sec is NULL, we should have signalled an error already. */
4751 BFD_ASSERT (htab
->tls_sec
!= NULL
);
4753 bfd_vma base
= align_power ((bfd_vma
) TCB_SIZE
,
4754 htab
->tls_sec
->alignment_power
);
4755 return htab
->tls_sec
->vma
- base
;
4759 symbol_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4760 unsigned long r_symndx
)
4762 /* Calculate the address of the GOT entry for symbol
4763 referred to in h. */
4765 return &h
->got
.offset
;
4769 struct elf_aarch64_local_symbol
*l
;
4771 l
= elf_aarch64_locals (input_bfd
);
4772 return &l
[r_symndx
].got_offset
;
4777 symbol_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4778 unsigned long r_symndx
)
4781 p
= symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
4786 symbol_got_offset_mark_p (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4787 unsigned long r_symndx
)
4790 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
4795 symbol_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4796 unsigned long r_symndx
)
4799 value
= * symbol_got_offset_ref (input_bfd
, h
, r_symndx
);
4805 symbol_tlsdesc_got_offset_ref (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4806 unsigned long r_symndx
)
4808 /* Calculate the address of the GOT entry for symbol
4809 referred to in h. */
4812 struct elf_aarch64_link_hash_entry
*eh
;
4813 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
4814 return &eh
->tlsdesc_got_jump_table_offset
;
4819 struct elf_aarch64_local_symbol
*l
;
4821 l
= elf_aarch64_locals (input_bfd
);
4822 return &l
[r_symndx
].tlsdesc_got_jump_table_offset
;
4827 symbol_tlsdesc_got_offset_mark (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4828 unsigned long r_symndx
)
4831 p
= symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4836 symbol_tlsdesc_got_offset_mark_p (bfd
*input_bfd
,
4837 struct elf_link_hash_entry
*h
,
4838 unsigned long r_symndx
)
4841 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4846 symbol_tlsdesc_got_offset (bfd
*input_bfd
, struct elf_link_hash_entry
*h
,
4847 unsigned long r_symndx
)
4850 value
= * symbol_tlsdesc_got_offset_ref (input_bfd
, h
, r_symndx
);
4855 /* Data for make_branch_to_erratum_835769_stub(). */
4857 struct erratum_835769_branch_to_stub_data
4859 struct bfd_link_info
*info
;
4860 asection
*output_section
;
4864 /* Helper to insert branches to erratum 835769 stubs in the right
4865 places for a particular section. */
4868 make_branch_to_erratum_835769_stub (struct bfd_hash_entry
*gen_entry
,
4871 struct elf_aarch64_stub_hash_entry
*stub_entry
;
4872 struct erratum_835769_branch_to_stub_data
*data
;
4874 unsigned long branch_insn
= 0;
4875 bfd_vma veneered_insn_loc
, veneer_entry_loc
;
4876 bfd_signed_vma branch_offset
;
4877 unsigned int target
;
4880 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
4881 data
= (struct erratum_835769_branch_to_stub_data
*) in_arg
;
4883 if (stub_entry
->target_section
!= data
->output_section
4884 || stub_entry
->stub_type
!= aarch64_stub_erratum_835769_veneer
)
4887 contents
= data
->contents
;
4888 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
4889 + stub_entry
->target_section
->output_offset
4890 + stub_entry
->target_value
;
4891 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
4892 + stub_entry
->stub_sec
->output_offset
4893 + stub_entry
->stub_offset
;
4894 branch_offset
= veneer_entry_loc
- veneered_insn_loc
;
4896 abfd
= stub_entry
->target_section
->owner
;
4897 if (!aarch64_valid_branch_p (veneer_entry_loc
, veneered_insn_loc
))
4899 (_("%pB: error: erratum 835769 stub out "
4900 "of range (input file too large)"), abfd
);
4902 target
= stub_entry
->target_value
;
4903 branch_insn
= 0x14000000;
4904 branch_offset
>>= 2;
4905 branch_offset
&= 0x3ffffff;
4906 branch_insn
|= branch_offset
;
4907 bfd_putl32 (branch_insn
, &contents
[target
]);
4914 _bfd_aarch64_erratum_843419_branch_to_stub (struct bfd_hash_entry
*gen_entry
,
4917 struct elf_aarch64_stub_hash_entry
*stub_entry
4918 = (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
4919 struct erratum_835769_branch_to_stub_data
*data
4920 = (struct erratum_835769_branch_to_stub_data
*) in_arg
;
4921 struct bfd_link_info
*info
;
4922 struct elf_aarch64_link_hash_table
*htab
;
4930 contents
= data
->contents
;
4931 section
= data
->output_section
;
4933 htab
= elf_aarch64_hash_table (info
);
4935 if (stub_entry
->target_section
!= section
4936 || stub_entry
->stub_type
!= aarch64_stub_erratum_843419_veneer
)
4939 insn
= bfd_getl32 (contents
+ stub_entry
->target_value
);
4941 stub_entry
->stub_sec
->contents
+ stub_entry
->stub_offset
);
4943 place
= (section
->output_section
->vma
+ section
->output_offset
4944 + stub_entry
->adrp_offset
);
4945 insn
= bfd_getl32 (contents
+ stub_entry
->adrp_offset
);
4947 if ((insn
& AARCH64_ADRP_OP_MASK
) != AARCH64_ADRP_OP
)
4950 bfd_signed_vma imm
=
4951 (_bfd_aarch64_sign_extend
4952 ((bfd_vma
) _bfd_aarch64_decode_adrp_imm (insn
) << 12, 33)
4955 if (htab
->fix_erratum_843419_adr
4956 && (imm
>= AARCH64_MIN_ADRP_IMM
&& imm
<= AARCH64_MAX_ADRP_IMM
))
4958 insn
= (_bfd_aarch64_reencode_adr_imm (AARCH64_ADR_OP
, imm
)
4959 | AARCH64_RT (insn
));
4960 bfd_putl32 (insn
, contents
+ stub_entry
->adrp_offset
);
4964 bfd_vma veneered_insn_loc
;
4965 bfd_vma veneer_entry_loc
;
4966 bfd_signed_vma branch_offset
;
4967 uint32_t branch_insn
;
4969 veneered_insn_loc
= stub_entry
->target_section
->output_section
->vma
4970 + stub_entry
->target_section
->output_offset
4971 + stub_entry
->target_value
;
4972 veneer_entry_loc
= stub_entry
->stub_sec
->output_section
->vma
4973 + stub_entry
->stub_sec
->output_offset
4974 + stub_entry
->stub_offset
;
4975 branch_offset
= veneer_entry_loc
- veneered_insn_loc
;
4977 abfd
= stub_entry
->target_section
->owner
;
4978 if (!aarch64_valid_branch_p (veneer_entry_loc
, veneered_insn_loc
))
4980 (_("%pB: error: erratum 843419 stub out "
4981 "of range (input file too large)"), abfd
);
4983 branch_insn
= 0x14000000;
4984 branch_offset
>>= 2;
4985 branch_offset
&= 0x3ffffff;
4986 branch_insn
|= branch_offset
;
4987 bfd_putl32 (branch_insn
, contents
+ stub_entry
->target_value
);
4994 elfNN_aarch64_write_section (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4995 struct bfd_link_info
*link_info
,
5000 struct elf_aarch64_link_hash_table
*globals
=
5001 elf_aarch64_hash_table (link_info
);
5003 if (globals
== NULL
)
5006 /* Fix code to point to erratum 835769 stubs. */
5007 if (globals
->fix_erratum_835769
)
5009 struct erratum_835769_branch_to_stub_data data
;
5011 data
.info
= link_info
;
5012 data
.output_section
= sec
;
5013 data
.contents
= contents
;
5014 bfd_hash_traverse (&globals
->stub_hash_table
,
5015 make_branch_to_erratum_835769_stub
, &data
);
5018 if (globals
->fix_erratum_843419
)
5020 struct erratum_835769_branch_to_stub_data data
;
5022 data
.info
= link_info
;
5023 data
.output_section
= sec
;
5024 data
.contents
= contents
;
5025 bfd_hash_traverse (&globals
->stub_hash_table
,
5026 _bfd_aarch64_erratum_843419_branch_to_stub
, &data
);
5032 /* Return TRUE if RELOC is a relocation against the base of GOT table. */
5035 aarch64_relocation_aginst_gp_p (bfd_reloc_code_real_type reloc
)
5037 return (reloc
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
5038 || reloc
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
5039 || reloc
== BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
5040 || reloc
== BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
5041 || reloc
== BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
);
5044 /* Perform a relocation as part of a final link. The input relocation type
5045 should be TLS relaxed. */
5047 static bfd_reloc_status_type
5048 elfNN_aarch64_final_link_relocate (reloc_howto_type
*howto
,
5051 asection
*input_section
,
5053 Elf_Internal_Rela
*rel
,
5055 struct bfd_link_info
*info
,
5057 struct elf_link_hash_entry
*h
,
5058 bfd_boolean
*unresolved_reloc_p
,
5059 bfd_boolean save_addend
,
5060 bfd_vma
*saved_addend
,
5061 Elf_Internal_Sym
*sym
)
5063 Elf_Internal_Shdr
*symtab_hdr
;
5064 unsigned int r_type
= howto
->type
;
5065 bfd_reloc_code_real_type bfd_r_type
5066 = elfNN_aarch64_bfd_reloc_from_howto (howto
);
5067 unsigned long r_symndx
;
5068 bfd_byte
*hit_data
= contents
+ rel
->r_offset
;
5069 bfd_vma place
, off
, got_entry_addr
= 0;
5070 bfd_signed_vma signed_addend
;
5071 struct elf_aarch64_link_hash_table
*globals
;
5072 bfd_boolean weak_undef_p
;
5073 bfd_boolean relative_reloc
;
5075 bfd_vma orig_value
= value
;
5076 bfd_boolean resolved_to_zero
;
5077 bfd_boolean abs_symbol_p
;
5079 globals
= elf_aarch64_hash_table (info
);
5081 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
5083 BFD_ASSERT (is_aarch64_elf (input_bfd
));
5085 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
5087 place
= input_section
->output_section
->vma
5088 + input_section
->output_offset
+ rel
->r_offset
;
5090 /* Get addend, accumulating the addend for consecutive relocs
5091 which refer to the same offset. */
5092 signed_addend
= saved_addend
? *saved_addend
: 0;
5093 signed_addend
+= rel
->r_addend
;
5095 weak_undef_p
= (h
? h
->root
.type
== bfd_link_hash_undefweak
5096 : bfd_is_und_section (sym_sec
));
5097 abs_symbol_p
= (h
!=NULL
&& h
->root
.type
== bfd_link_hash_defined
5098 && bfd_is_abs_section (h
->root
.u
.def
.section
));
5101 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
5102 it here if it is defined in a non-shared object. */
5104 && h
->type
== STT_GNU_IFUNC
5111 if ((input_section
->flags
& SEC_ALLOC
) == 0)
5113 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
5114 STT_GNU_IFUNC symbol as STT_FUNC. */
5115 if (elf_section_type (input_section
) == SHT_NOTE
)
5118 /* Dynamic relocs are not propagated for SEC_DEBUGGING
5119 sections because such sections are not SEC_ALLOC and
5120 thus ld.so will not process them. */
5121 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
5122 return bfd_reloc_ok
;
5124 if (h
->root
.root
.string
)
5125 name
= h
->root
.root
.string
;
5127 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
, NULL
);
5129 /* xgettext:c-format */
5130 (_("%pB(%pA+%#" PRIx64
"): "
5131 "unresolvable %s relocation against symbol `%s'"),
5132 input_bfd
, input_section
, (uint64_t) rel
->r_offset
,
5134 bfd_set_error (bfd_error_bad_value
);
5135 return bfd_reloc_notsupported
;
5137 else if (h
->plt
.offset
== (bfd_vma
) -1)
5138 goto bad_ifunc_reloc
;
5140 /* STT_GNU_IFUNC symbol must go through PLT. */
5141 plt
= globals
->root
.splt
? globals
->root
.splt
: globals
->root
.iplt
;
5142 value
= (plt
->output_section
->vma
+ plt
->output_offset
+ h
->plt
.offset
);
5148 if (h
->root
.root
.string
)
5149 name
= h
->root
.root
.string
;
5151 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
5154 /* xgettext:c-format */
5155 (_("%pB: relocation %s against STT_GNU_IFUNC "
5156 "symbol `%s' isn't handled by %s"), input_bfd
,
5157 howto
->name
, name
, __FUNCTION__
);
5158 bfd_set_error (bfd_error_bad_value
);
5159 return bfd_reloc_notsupported
;
5161 case BFD_RELOC_AARCH64_NN
:
5162 if (rel
->r_addend
!= 0)
5164 if (h
->root
.root
.string
)
5165 name
= h
->root
.root
.string
;
5167 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
,
5170 /* xgettext:c-format */
5171 (_("%pB: relocation %s against STT_GNU_IFUNC "
5172 "symbol `%s' has non-zero addend: %" PRId64
),
5173 input_bfd
, howto
->name
, name
, (int64_t) rel
->r_addend
);
5174 bfd_set_error (bfd_error_bad_value
);
5175 return bfd_reloc_notsupported
;
5178 /* Generate dynamic relocation only when there is a
5179 non-GOT reference in a shared object. */
5180 if (bfd_link_pic (info
) && h
->non_got_ref
)
5182 Elf_Internal_Rela outrel
;
5185 /* Need a dynamic relocation to get the real function
5187 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
5191 if (outrel
.r_offset
== (bfd_vma
) -1
5192 || outrel
.r_offset
== (bfd_vma
) -2)
5195 outrel
.r_offset
+= (input_section
->output_section
->vma
5196 + input_section
->output_offset
);
5198 if (h
->dynindx
== -1
5200 || bfd_link_executable (info
))
5202 /* This symbol is resolved locally. */
5203 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
5204 outrel
.r_addend
= (h
->root
.u
.def
.value
5205 + h
->root
.u
.def
.section
->output_section
->vma
5206 + h
->root
.u
.def
.section
->output_offset
);
5210 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5211 outrel
.r_addend
= 0;
5214 sreloc
= globals
->root
.irelifunc
;
5215 elf_append_rela (output_bfd
, sreloc
, &outrel
);
5217 /* If this reloc is against an external symbol, we
5218 do not want to fiddle with the addend. Otherwise,
5219 we need to include the symbol value so that it
5220 becomes an addend for the dynamic reloc. For an
5221 internal symbol, we have updated addend. */
5222 return bfd_reloc_ok
;
5225 case BFD_RELOC_AARCH64_CALL26
:
5226 case BFD_RELOC_AARCH64_JUMP26
:
5227 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5230 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
5232 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5233 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5234 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5235 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5236 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5237 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5238 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5239 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5240 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5241 base_got
= globals
->root
.sgot
;
5242 off
= h
->got
.offset
;
5244 if (base_got
== NULL
)
5247 if (off
== (bfd_vma
) -1)
5251 /* We can't use h->got.offset here to save state, or
5252 even just remember the offset, as finish_dynamic_symbol
5253 would use that as offset into .got. */
5255 if (globals
->root
.splt
!= NULL
)
5257 plt_index
= ((h
->plt
.offset
- globals
->plt_header_size
) /
5258 globals
->plt_entry_size
);
5259 off
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
5260 base_got
= globals
->root
.sgotplt
;
5264 plt_index
= h
->plt
.offset
/ globals
->plt_entry_size
;
5265 off
= plt_index
* GOT_ENTRY_SIZE
;
5266 base_got
= globals
->root
.igotplt
;
5269 if (h
->dynindx
== -1
5273 /* This references the local definition. We must
5274 initialize this entry in the global offset table.
5275 Since the offset must always be a multiple of 8,
5276 we use the least significant bit to record
5277 whether we have initialized it already.
5279 When doing a dynamic link, we create a .rela.got
5280 relocation entry to initialize the value. This
5281 is done in the finish_dynamic_symbol routine. */
5286 bfd_put_NN (output_bfd
, value
,
5287 base_got
->contents
+ off
);
5288 /* Note that this is harmless as -1 | 1 still is -1. */
5292 value
= (base_got
->output_section
->vma
5293 + base_got
->output_offset
+ off
);
5296 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
,
5298 unresolved_reloc_p
);
5300 if (aarch64_relocation_aginst_gp_p (bfd_r_type
))
5301 addend
= (globals
->root
.sgot
->output_section
->vma
5302 + globals
->root
.sgot
->output_offset
);
5304 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5305 addend
, weak_undef_p
);
5306 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
, howto
, value
);
5307 case BFD_RELOC_AARCH64_ADD_LO12
:
5308 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5314 resolved_to_zero
= (h
!= NULL
5315 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
5319 case BFD_RELOC_AARCH64_NONE
:
5320 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
5321 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
5322 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
5323 *unresolved_reloc_p
= FALSE
;
5324 return bfd_reloc_ok
;
5326 case BFD_RELOC_AARCH64_NN
:
5328 /* When generating a shared object or relocatable executable, these
5329 relocations are copied into the output file to be resolved at
5331 if (((bfd_link_pic (info
)
5332 || globals
->root
.is_relocatable_executable
)
5333 && (input_section
->flags
& SEC_ALLOC
)
5335 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
5336 && !resolved_to_zero
)
5337 || h
->root
.type
!= bfd_link_hash_undefweak
))
5338 /* Or we are creating an executable, we may need to keep relocations
5339 for symbols satisfied by a dynamic library if we manage to avoid
5340 copy relocs for the symbol. */
5341 || (ELIMINATE_COPY_RELOCS
5342 && !bfd_link_pic (info
)
5344 && (input_section
->flags
& SEC_ALLOC
)
5349 || h
->root
.type
== bfd_link_hash_undefweak
5350 || h
->root
.type
== bfd_link_hash_undefined
)))
5352 Elf_Internal_Rela outrel
;
5354 bfd_boolean skip
, relocate
;
5357 *unresolved_reloc_p
= FALSE
;
5362 outrel
.r_addend
= signed_addend
;
5364 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5366 if (outrel
.r_offset
== (bfd_vma
) - 1)
5368 else if (outrel
.r_offset
== (bfd_vma
) - 2)
5373 else if (abs_symbol_p
)
5375 /* Local absolute symbol. */
5376 skip
= (h
->forced_local
|| (h
->dynindx
== -1));
5380 outrel
.r_offset
+= (input_section
->output_section
->vma
5381 + input_section
->output_offset
);
5384 memset (&outrel
, 0, sizeof outrel
);
5387 && (!bfd_link_pic (info
)
5388 || !(bfd_link_pie (info
) || SYMBOLIC_BIND (info
, h
))
5389 || !h
->def_regular
))
5390 outrel
.r_info
= ELFNN_R_INFO (h
->dynindx
, r_type
);
5395 /* On SVR4-ish systems, the dynamic loader cannot
5396 relocate the text and data segments independently,
5397 so the symbol does not matter. */
5399 relocate
= globals
->no_apply_dynamic_relocs
? FALSE
: TRUE
;
5400 outrel
.r_info
= ELFNN_R_INFO (symbol
, AARCH64_R (RELATIVE
));
5401 outrel
.r_addend
+= value
;
5404 sreloc
= elf_section_data (input_section
)->sreloc
;
5405 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
5406 return bfd_reloc_notsupported
;
5408 loc
= sreloc
->contents
+ sreloc
->reloc_count
++ * RELOC_SIZE (globals
);
5409 bfd_elfNN_swap_reloca_out (output_bfd
, &outrel
, loc
);
5411 if (sreloc
->reloc_count
* RELOC_SIZE (globals
) > sreloc
->size
)
5413 /* Sanity to check that we have previously allocated
5414 sufficient space in the relocation section for the
5415 number of relocations we actually want to emit. */
5419 /* If this reloc is against an external symbol, we do not want to
5420 fiddle with the addend. Otherwise, we need to include the symbol
5421 value so that it becomes an addend for the dynamic reloc. */
5423 return bfd_reloc_ok
;
5425 return _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5426 contents
, rel
->r_offset
, value
,
5430 value
+= signed_addend
;
5433 case BFD_RELOC_AARCH64_CALL26
:
5434 case BFD_RELOC_AARCH64_JUMP26
:
5436 asection
*splt
= globals
->root
.splt
;
5437 bfd_boolean via_plt_p
=
5438 splt
!= NULL
&& h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) - 1;
5440 /* A call to an undefined weak symbol is converted to a jump to
5441 the next instruction unless a PLT entry will be created.
5442 The jump to the next instruction is optimized as a NOP.
5443 Do the same for local undefined symbols. */
5444 if (weak_undef_p
&& ! via_plt_p
)
5446 bfd_putl32 (INSN_NOP
, hit_data
);
5447 return bfd_reloc_ok
;
5450 /* If the call goes through a PLT entry, make sure to
5451 check distance to the right destination address. */
5453 value
= (splt
->output_section
->vma
5454 + splt
->output_offset
+ h
->plt
.offset
);
5456 /* Check if a stub has to be inserted because the destination
5458 struct elf_aarch64_stub_hash_entry
*stub_entry
= NULL
;
5460 /* If the branch destination is directed to plt stub, "value" will be
5461 the final destination, otherwise we should plus signed_addend, it may
5462 contain non-zero value, for example call to local function symbol
5463 which are turned into "sec_sym + sec_off", and sec_off is kept in
5465 if (! aarch64_valid_branch_p (via_plt_p
? value
: value
+ signed_addend
,
5467 /* The target is out of reach, so redirect the branch to
5468 the local stub for this function. */
5469 stub_entry
= elfNN_aarch64_get_stub_entry (input_section
, sym_sec
, h
,
5471 if (stub_entry
!= NULL
)
5473 value
= (stub_entry
->stub_offset
5474 + stub_entry
->stub_sec
->output_offset
5475 + stub_entry
->stub_sec
->output_section
->vma
);
5477 /* We have redirected the destination to stub entry address,
5478 so ignore any addend record in the original rela entry. */
5482 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5483 signed_addend
, weak_undef_p
);
5484 *unresolved_reloc_p
= FALSE
;
5487 case BFD_RELOC_AARCH64_16_PCREL
:
5488 case BFD_RELOC_AARCH64_32_PCREL
:
5489 case BFD_RELOC_AARCH64_64_PCREL
:
5490 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
5491 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
5492 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
5493 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
5494 case BFD_RELOC_AARCH64_MOVW_PREL_G0
:
5495 case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC
:
5496 case BFD_RELOC_AARCH64_MOVW_PREL_G1
:
5497 case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC
:
5498 case BFD_RELOC_AARCH64_MOVW_PREL_G2
:
5499 case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC
:
5500 case BFD_RELOC_AARCH64_MOVW_PREL_G3
:
5501 if (bfd_link_pic (info
)
5502 && (input_section
->flags
& SEC_ALLOC
) != 0
5503 && (input_section
->flags
& SEC_READONLY
) != 0
5504 && !SYMBOL_REFERENCES_LOCAL (info
, h
))
5506 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5509 /* xgettext:c-format */
5510 (_("%pB: relocation %s against symbol `%s' which may bind "
5511 "externally can not be used when making a shared object; "
5512 "recompile with -fPIC"),
5513 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
5514 h
->root
.root
.string
);
5515 bfd_set_error (bfd_error_bad_value
);
5516 return bfd_reloc_notsupported
;
5520 case BFD_RELOC_AARCH64_16
:
5522 case BFD_RELOC_AARCH64_32
:
5524 case BFD_RELOC_AARCH64_ADD_LO12
:
5525 case BFD_RELOC_AARCH64_BRANCH19
:
5526 case BFD_RELOC_AARCH64_LDST128_LO12
:
5527 case BFD_RELOC_AARCH64_LDST16_LO12
:
5528 case BFD_RELOC_AARCH64_LDST32_LO12
:
5529 case BFD_RELOC_AARCH64_LDST64_LO12
:
5530 case BFD_RELOC_AARCH64_LDST8_LO12
:
5531 case BFD_RELOC_AARCH64_MOVW_G0
:
5532 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
5533 case BFD_RELOC_AARCH64_MOVW_G0_S
:
5534 case BFD_RELOC_AARCH64_MOVW_G1
:
5535 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
5536 case BFD_RELOC_AARCH64_MOVW_G1_S
:
5537 case BFD_RELOC_AARCH64_MOVW_G2
:
5538 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
5539 case BFD_RELOC_AARCH64_MOVW_G2_S
:
5540 case BFD_RELOC_AARCH64_MOVW_G3
:
5541 case BFD_RELOC_AARCH64_TSTBR14
:
5542 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5543 signed_addend
, weak_undef_p
);
5546 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
5547 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
5548 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
5549 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
5550 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
5551 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
5552 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
5553 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
5554 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
5555 if (globals
->root
.sgot
== NULL
)
5556 BFD_ASSERT (h
!= NULL
);
5558 relative_reloc
= FALSE
;
5563 /* If a symbol is not dynamic and is not undefined weak, bind it
5564 locally and generate a RELATIVE relocation under PIC mode.
5566 NOTE: one symbol may be referenced by several relocations, we
5567 should only generate one RELATIVE relocation for that symbol.
5568 Therefore, check GOT offset mark first. */
5569 if (h
->dynindx
== -1
5571 && h
->root
.type
!= bfd_link_hash_undefweak
5572 && bfd_link_pic (info
)
5573 && !symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5574 relative_reloc
= TRUE
;
5576 value
= aarch64_calculate_got_entry_vma (h
, globals
, info
, value
,
5578 unresolved_reloc_p
);
5579 /* Record the GOT entry address which will be used when generating
5580 RELATIVE relocation. */
5582 got_entry_addr
= value
;
5584 if (aarch64_relocation_aginst_gp_p (bfd_r_type
))
5585 addend
= (globals
->root
.sgot
->output_section
->vma
5586 + globals
->root
.sgot
->output_offset
);
5587 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5588 addend
, weak_undef_p
);
5593 struct elf_aarch64_local_symbol
*locals
5594 = elf_aarch64_locals (input_bfd
);
5598 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
5600 /* xgettext:c-format */
5601 (_("%pB: local symbol descriptor table be NULL when applying "
5602 "relocation %s against local symbol"),
5603 input_bfd
, elfNN_aarch64_howto_table
[howto_index
].name
);
5607 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5608 base_got
= globals
->root
.sgot
;
5609 got_entry_addr
= (base_got
->output_section
->vma
5610 + base_got
->output_offset
+ off
);
5612 if (!symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
5614 bfd_put_64 (output_bfd
, value
, base_got
->contents
+ off
);
5616 /* For local symbol, we have done absolute relocation in static
5617 linking stage. While for shared library, we need to update the
5618 content of GOT entry according to the shared object's runtime
5619 base address. So, we need to generate a R_AARCH64_RELATIVE reloc
5620 for dynamic linker. */
5621 if (bfd_link_pic (info
))
5622 relative_reloc
= TRUE
;
5624 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
5627 /* Update the relocation value to GOT entry addr as we have transformed
5628 the direct data access into indirect data access through GOT. */
5629 value
= got_entry_addr
;
5631 if (aarch64_relocation_aginst_gp_p (bfd_r_type
))
5632 addend
= base_got
->output_section
->vma
+ base_got
->output_offset
;
5634 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5635 addend
, weak_undef_p
);
5641 Elf_Internal_Rela outrel
;
5643 s
= globals
->root
.srelgot
;
5647 outrel
.r_offset
= got_entry_addr
;
5648 outrel
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
5649 outrel
.r_addend
= orig_value
;
5650 elf_append_rela (output_bfd
, s
, &outrel
);
5654 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
5655 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
5656 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
5657 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
5658 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
5659 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
5660 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
5661 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
5662 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
5663 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
5664 if (globals
->root
.sgot
== NULL
)
5665 return bfd_reloc_notsupported
;
5667 value
= (symbol_got_offset (input_bfd
, h
, r_symndx
)
5668 + globals
->root
.sgot
->output_section
->vma
5669 + globals
->root
.sgot
->output_offset
);
5671 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5673 *unresolved_reloc_p
= FALSE
;
5676 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
5677 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
5678 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
5679 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
5680 if (globals
->root
.sgot
== NULL
)
5681 return bfd_reloc_notsupported
;
5683 value
= symbol_got_offset (input_bfd
, h
, r_symndx
);
5684 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5686 *unresolved_reloc_p
= FALSE
;
5689 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_HI12
:
5690 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12
:
5691 case BFD_RELOC_AARCH64_TLSLD_ADD_DTPREL_LO12_NC
:
5692 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12
:
5693 case BFD_RELOC_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC
:
5694 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12
:
5695 case BFD_RELOC_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC
:
5696 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12
:
5697 case BFD_RELOC_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC
:
5698 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12
:
5699 case BFD_RELOC_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC
:
5700 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0
:
5701 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0_NC
:
5702 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1
:
5703 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1_NC
:
5704 case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2
:
5705 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5706 signed_addend
- dtpoff_base (info
),
5710 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_HI12
:
5711 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12
:
5712 case BFD_RELOC_AARCH64_TLSLE_ADD_TPREL_LO12_NC
:
5713 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0
:
5714 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G0_NC
:
5715 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
5716 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
5717 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
5718 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5719 signed_addend
- tpoff_base (info
),
5721 *unresolved_reloc_p
= FALSE
;
5724 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
5725 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5726 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5727 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
5728 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
5729 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
5730 if (globals
->root
.sgot
== NULL
)
5731 return bfd_reloc_notsupported
;
5732 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
5733 + globals
->root
.sgotplt
->output_section
->vma
5734 + globals
->root
.sgotplt
->output_offset
5735 + globals
->sgotplt_jump_table_size
);
5737 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5739 *unresolved_reloc_p
= FALSE
;
5742 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
5743 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
5744 if (globals
->root
.sgot
== NULL
)
5745 return bfd_reloc_notsupported
;
5747 value
= (symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
)
5748 + globals
->root
.sgotplt
->output_section
->vma
5749 + globals
->root
.sgotplt
->output_offset
5750 + globals
->sgotplt_jump_table_size
);
5752 value
-= (globals
->root
.sgot
->output_section
->vma
5753 + globals
->root
.sgot
->output_offset
);
5755 value
= _bfd_aarch64_elf_resolve_relocation (bfd_r_type
, place
, value
,
5757 *unresolved_reloc_p
= FALSE
;
5761 return bfd_reloc_notsupported
;
5765 *saved_addend
= value
;
5767 /* Only apply the final relocation in a sequence. */
5769 return bfd_reloc_continue
;
5771 return _bfd_aarch64_elf_put_addend (input_bfd
, hit_data
, bfd_r_type
,
5775 /* LP64 and ILP32 operates on x- and w-registers respectively.
5776 Next definitions take into account the difference between
5777 corresponding machine codes. R means x-register if the target
5778 arch is LP64, and w-register if the target is ILP32. */
5781 # define add_R0_R0 (0x91000000)
5782 # define add_R0_R0_R1 (0x8b000020)
5783 # define add_R0_R1 (0x91400020)
5784 # define ldr_R0 (0x58000000)
5785 # define ldr_R0_mask(i) (i & 0xffffffe0)
5786 # define ldr_R0_x0 (0xf9400000)
5787 # define ldr_hw_R0 (0xf2a00000)
5788 # define movk_R0 (0xf2800000)
5789 # define movz_R0 (0xd2a00000)
5790 # define movz_hw_R0 (0xd2c00000)
5791 #else /*ARCH_SIZE == 32 */
5792 # define add_R0_R0 (0x11000000)
5793 # define add_R0_R0_R1 (0x0b000020)
5794 # define add_R0_R1 (0x11400020)
5795 # define ldr_R0 (0x18000000)
5796 # define ldr_R0_mask(i) (i & 0xbfffffe0)
5797 # define ldr_R0_x0 (0xb9400000)
5798 # define ldr_hw_R0 (0x72a00000)
5799 # define movk_R0 (0x72800000)
5800 # define movz_R0 (0x52a00000)
5801 # define movz_hw_R0 (0x52c00000)
5804 /* Handle TLS relaxations. Relaxing is possible for symbols that use
5805 R_AARCH64_TLSDESC_ADR_{PAGE, LD64_LO12_NC, ADD_LO12_NC} during a static
5808 Return bfd_reloc_ok if we're done, bfd_reloc_continue if the caller
5809 is to then call final_link_relocate. Return other values in the
5812 static bfd_reloc_status_type
5813 elfNN_aarch64_tls_relax (struct elf_aarch64_link_hash_table
*globals
,
5814 bfd
*input_bfd
, bfd_byte
*contents
,
5815 Elf_Internal_Rela
*rel
, struct elf_link_hash_entry
*h
)
5817 bfd_boolean is_local
= h
== NULL
;
5818 unsigned int r_type
= ELFNN_R_TYPE (rel
->r_info
);
5821 BFD_ASSERT (globals
&& input_bfd
&& contents
&& rel
);
5823 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
))
5825 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
5826 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
5829 /* GD->LE relaxation:
5830 adrp x0, :tlsgd:var => movz R0, :tprel_g1:var
5832 adrp x0, :tlsdesc:var => movz R0, :tprel_g1:var
5834 Where R is x for LP64, and w for ILP32. */
5835 bfd_putl32 (movz_R0
, contents
+ rel
->r_offset
);
5836 return bfd_reloc_continue
;
5840 /* GD->IE relaxation:
5841 adrp x0, :tlsgd:var => adrp x0, :gottprel:var
5843 adrp x0, :tlsdesc:var => adrp x0, :gottprel:var
5845 return bfd_reloc_continue
;
5848 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
5852 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
5855 /* Tiny TLSDESC->LE relaxation:
5856 ldr x1, :tlsdesc:var => movz R0, #:tprel_g1:var
5857 adr x0, :tlsdesc:var => movk R0, #:tprel_g0_nc:var
5861 Where R is x for LP64, and w for ILP32. */
5862 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
5863 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
5865 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5866 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
5867 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5869 bfd_putl32 (movz_R0
, contents
+ rel
->r_offset
);
5870 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
+ 4);
5871 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
5872 return bfd_reloc_continue
;
5876 /* Tiny TLSDESC->IE relaxation:
5877 ldr x1, :tlsdesc:var => ldr x0, :gottprel:var
5878 adr x0, :tlsdesc:var => nop
5882 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSDESC_ADR_PREL21
));
5883 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (TLSDESC_CALL
));
5885 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5886 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5888 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
);
5889 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
5890 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 8);
5891 return bfd_reloc_continue
;
5894 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
5897 /* Tiny GD->LE relaxation:
5898 adr x0, :tlsgd:var => mrs x1, tpidr_el0
5899 bl __tls_get_addr => add R0, R1, #:tprel_hi12:x, lsl #12
5900 nop => add R0, R0, #:tprel_lo12_nc:x
5902 Where R is x for LP64, and x for Ilp32. */
5904 /* First kill the tls_get_addr reloc on the bl instruction. */
5905 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5907 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 0);
5908 bfd_putl32 (add_R0_R1
, contents
+ rel
->r_offset
+ 4);
5909 bfd_putl32 (add_R0_R0
, contents
+ rel
->r_offset
+ 8);
5911 rel
[1].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5912 AARCH64_R (TLSLE_ADD_TPREL_LO12_NC
));
5913 rel
[1].r_offset
= rel
->r_offset
+ 8;
5915 /* Move the current relocation to the second instruction in
5918 rel
->r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5919 AARCH64_R (TLSLE_ADD_TPREL_HI12
));
5920 return bfd_reloc_continue
;
5924 /* Tiny GD->IE relaxation:
5925 adr x0, :tlsgd:var => ldr R0, :gottprel:var
5926 bl __tls_get_addr => mrs x1, tpidr_el0
5927 nop => add R0, R0, R1
5929 Where R is x for LP64, and w for Ilp32. */
5931 /* First kill the tls_get_addr reloc on the bl instruction. */
5932 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
5933 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5935 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
);
5936 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
5937 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 8);
5938 return bfd_reloc_continue
;
5942 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
5943 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (TLSGD_MOVW_G0_NC
));
5944 BFD_ASSERT (rel
->r_offset
+ 12 == rel
[2].r_offset
);
5945 BFD_ASSERT (ELFNN_R_TYPE (rel
[2].r_info
) == AARCH64_R (CALL26
));
5949 /* Large GD->LE relaxation:
5950 movz x0, #:tlsgd_g1:var => movz x0, #:tprel_g2:var, lsl #32
5951 movk x0, #:tlsgd_g0_nc:var => movk x0, #:tprel_g1_nc:var, lsl #16
5952 add x0, gp, x0 => movk x0, #:tprel_g0_nc:var
5953 bl __tls_get_addr => mrs x1, tpidr_el0
5954 nop => add x0, x0, x1
5956 rel
[2].r_info
= ELFNN_R_INFO (ELFNN_R_SYM (rel
->r_info
),
5957 AARCH64_R (TLSLE_MOVW_TPREL_G0_NC
));
5958 rel
[2].r_offset
= rel
->r_offset
+ 8;
5960 bfd_putl32 (movz_hw_R0
, contents
+ rel
->r_offset
+ 0);
5961 bfd_putl32 (ldr_hw_R0
, contents
+ rel
->r_offset
+ 4);
5962 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
+ 8);
5963 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 12);
5964 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 16);
5968 /* Large GD->IE relaxation:
5969 movz x0, #:tlsgd_g1:var => movz x0, #:gottprel_g1:var, lsl #16
5970 movk x0, #:tlsgd_g0_nc:var => movk x0, #:gottprel_g0_nc:var
5971 add x0, gp, x0 => ldr x0, [gp, x0]
5972 bl __tls_get_addr => mrs x1, tpidr_el0
5973 nop => add x0, x0, x1
5975 rel
[2].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
5976 bfd_putl32 (0xd2a80000, contents
+ rel
->r_offset
+ 0);
5977 bfd_putl32 (ldr_R0
, contents
+ rel
->r_offset
+ 8);
5978 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 12);
5979 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 16);
5981 return bfd_reloc_continue
;
5983 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
5984 return bfd_reloc_continue
;
5987 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
5988 return bfd_reloc_continue
;
5990 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
5993 /* GD->LE relaxation:
5994 ldr xd, [x0, #:tlsdesc_lo12:var] => movk x0, :tprel_g0_nc:var
5996 Where R is x for lp64 mode, and w for ILP32 mode. */
5997 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
5998 return bfd_reloc_continue
;
6002 /* GD->IE relaxation:
6003 ldr xd, [x0, #:tlsdesc_lo12:var] => ldr R0, [x0, #:gottprel_lo12:var]
6005 Where R is x for lp64 mode, and w for ILP32 mode. */
6006 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6007 bfd_putl32 (ldr_R0_mask (insn
), contents
+ rel
->r_offset
);
6008 return bfd_reloc_continue
;
6011 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6014 /* GD->LE relaxation
6015 add x0, #:tlsgd_lo12:var => movk R0, :tprel_g0_nc:var
6016 bl __tls_get_addr => mrs x1, tpidr_el0
6017 nop => add R0, R1, R0
6019 Where R is x for lp64 mode, and w for ILP32 mode. */
6021 /* First kill the tls_get_addr reloc on the bl instruction. */
6022 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6023 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6025 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
6026 bfd_putl32 (0xd53bd041, contents
+ rel
->r_offset
+ 4);
6027 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
->r_offset
+ 8);
6028 return bfd_reloc_continue
;
6032 /* GD->IE relaxation
6033 ADD x0, #:tlsgd_lo12:var => ldr R0, [x0, #:gottprel_lo12:var]
6034 BL __tls_get_addr => mrs x1, tpidr_el0
6036 NOP => add R0, R1, R0
6038 Where R is x for lp64 mode, and w for ilp32 mode. */
6040 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6042 /* Remove the relocation on the BL instruction. */
6043 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6045 /* We choose to fixup the BL and NOP instructions using the
6046 offset from the second relocation to allow flexibility in
6047 scheduling instructions between the ADD and BL. */
6048 bfd_putl32 (ldr_R0_x0
, contents
+ rel
->r_offset
);
6049 bfd_putl32 (0xd53bd041, contents
+ rel
[1].r_offset
);
6050 bfd_putl32 (add_R0_R0_R1
, contents
+ rel
[1].r_offset
+ 4);
6051 return bfd_reloc_continue
;
6054 case BFD_RELOC_AARCH64_TLSDESC_ADD
:
6055 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
6056 case BFD_RELOC_AARCH64_TLSDESC_CALL
:
6057 /* GD->IE/LE relaxation:
6058 add x0, x0, #:tlsdesc_lo12:var => nop
6061 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
);
6062 return bfd_reloc_ok
;
6064 case BFD_RELOC_AARCH64_TLSDESC_LDR
:
6067 /* GD->LE relaxation:
6068 ldr xd, [gp, xn] => movk R0, #:tprel_g0_nc:var
6070 Where R is x for lp64 mode, and w for ILP32 mode. */
6071 bfd_putl32 (movk_R0
, contents
+ rel
->r_offset
);
6072 return bfd_reloc_continue
;
6076 /* GD->IE relaxation:
6077 ldr xd, [gp, xn] => ldr R0, [gp, xn]
6079 Where R is x for lp64 mode, and w for ILP32 mode. */
6080 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6081 bfd_putl32 (ldr_R0_mask (insn
), contents
+ rel
->r_offset
);
6082 return bfd_reloc_ok
;
6085 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
6086 /* GD->LE relaxation:
6087 movk xd, #:tlsdesc_off_g0_nc:var => movk R0, #:tprel_g1_nc:var, lsl #16
6089 movk xd, #:tlsdesc_off_g0_nc:var => movk Rd, #:gottprel_g0_nc:var
6091 Where R is x for lp64 mode, and w for ILP32 mode. */
6093 bfd_putl32 (ldr_hw_R0
, contents
+ rel
->r_offset
);
6094 return bfd_reloc_continue
;
6096 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
6099 /* GD->LE relaxation:
6100 movz xd, #:tlsdesc_off_g1:var => movz R0, #:tprel_g2:var, lsl #32
6102 Where R is x for lp64 mode, and w for ILP32 mode. */
6103 bfd_putl32 (movz_hw_R0
, contents
+ rel
->r_offset
);
6104 return bfd_reloc_continue
;
6108 /* GD->IE relaxation:
6109 movz xd, #:tlsdesc_off_g1:var => movz Rd, #:gottprel_g1:var, lsl #16
6111 Where R is x for lp64 mode, and w for ILP32 mode. */
6112 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6113 bfd_putl32 (movz_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6114 return bfd_reloc_continue
;
6117 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6118 /* IE->LE relaxation:
6119 adrp xd, :gottprel:var => movz Rd, :tprel_g1:var
6121 Where R is x for lp64 mode, and w for ILP32 mode. */
6124 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6125 bfd_putl32 (movz_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6127 return bfd_reloc_continue
;
6129 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
6130 /* IE->LE relaxation:
6131 ldr xd, [xm, #:gottprel_lo12:var] => movk Rd, :tprel_g0_nc:var
6133 Where R is x for lp64 mode, and w for ILP32 mode. */
6136 insn
= bfd_getl32 (contents
+ rel
->r_offset
);
6137 bfd_putl32 (movk_R0
| (insn
& 0x1f), contents
+ rel
->r_offset
);
6139 return bfd_reloc_continue
;
6141 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6142 /* LD->LE relaxation (tiny):
6143 adr x0, :tlsldm:x => mrs x0, tpidr_el0
6144 bl __tls_get_addr => add R0, R0, TCB_SIZE
6146 Where R is x for lp64 mode, and w for ilp32 mode. */
6149 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6150 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6151 /* No need of CALL26 relocation for tls_get_addr. */
6152 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6153 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
+ 0);
6154 bfd_putl32 (add_R0_R0
| (TCB_SIZE
<< 10),
6155 contents
+ rel
->r_offset
+ 4);
6156 return bfd_reloc_ok
;
6158 return bfd_reloc_continue
;
6160 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6161 /* LD->LE relaxation (small):
6162 adrp x0, :tlsldm:x => mrs x0, tpidr_el0
6166 bfd_putl32 (0xd53bd040, contents
+ rel
->r_offset
);
6167 return bfd_reloc_ok
;
6169 return bfd_reloc_continue
;
6171 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6172 /* LD->LE relaxation (small):
6173 add x0, #:tlsldm_lo12:x => add R0, R0, TCB_SIZE
6174 bl __tls_get_addr => nop
6176 Where R is x for lp64 mode, and w for ilp32 mode. */
6179 BFD_ASSERT (rel
->r_offset
+ 4 == rel
[1].r_offset
);
6180 BFD_ASSERT (ELFNN_R_TYPE (rel
[1].r_info
) == AARCH64_R (CALL26
));
6181 /* No need of CALL26 relocation for tls_get_addr. */
6182 rel
[1].r_info
= ELFNN_R_INFO (STN_UNDEF
, R_AARCH64_NONE
);
6183 bfd_putl32 (add_R0_R0
| (TCB_SIZE
<< 10),
6184 contents
+ rel
->r_offset
+ 0);
6185 bfd_putl32 (INSN_NOP
, contents
+ rel
->r_offset
+ 4);
6186 return bfd_reloc_ok
;
6188 return bfd_reloc_continue
;
6191 return bfd_reloc_continue
;
6194 return bfd_reloc_ok
;
6197 /* Relocate an AArch64 ELF section. */
6200 elfNN_aarch64_relocate_section (bfd
*output_bfd
,
6201 struct bfd_link_info
*info
,
6203 asection
*input_section
,
6205 Elf_Internal_Rela
*relocs
,
6206 Elf_Internal_Sym
*local_syms
,
6207 asection
**local_sections
)
6209 Elf_Internal_Shdr
*symtab_hdr
;
6210 struct elf_link_hash_entry
**sym_hashes
;
6211 Elf_Internal_Rela
*rel
;
6212 Elf_Internal_Rela
*relend
;
6214 struct elf_aarch64_link_hash_table
*globals
;
6215 bfd_boolean save_addend
= FALSE
;
6218 globals
= elf_aarch64_hash_table (info
);
6220 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
6221 sym_hashes
= elf_sym_hashes (input_bfd
);
6224 relend
= relocs
+ input_section
->reloc_count
;
6225 for (; rel
< relend
; rel
++)
6227 unsigned int r_type
;
6228 bfd_reloc_code_real_type bfd_r_type
;
6229 bfd_reloc_code_real_type relaxed_bfd_r_type
;
6230 reloc_howto_type
*howto
;
6231 unsigned long r_symndx
;
6232 Elf_Internal_Sym
*sym
;
6234 struct elf_link_hash_entry
*h
;
6236 bfd_reloc_status_type r
;
6239 bfd_boolean unresolved_reloc
= FALSE
;
6240 char *error_message
= NULL
;
6242 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
6243 r_type
= ELFNN_R_TYPE (rel
->r_info
);
6245 bfd_reloc
.howto
= elfNN_aarch64_howto_from_type (input_bfd
, r_type
);
6246 howto
= bfd_reloc
.howto
;
6249 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
6251 bfd_r_type
= elfNN_aarch64_bfd_reloc_from_howto (howto
);
6257 if (r_symndx
< symtab_hdr
->sh_info
)
6259 sym
= local_syms
+ r_symndx
;
6260 sym_type
= ELFNN_ST_TYPE (sym
->st_info
);
6261 sec
= local_sections
[r_symndx
];
6263 /* An object file might have a reference to a local
6264 undefined symbol. This is a daft object file, but we
6265 should at least do something about it. */
6266 if (r_type
!= R_AARCH64_NONE
&& r_type
!= R_AARCH64_NULL
6267 && bfd_is_und_section (sec
)
6268 && ELF_ST_BIND (sym
->st_info
) != STB_WEAK
)
6269 (*info
->callbacks
->undefined_symbol
)
6270 (info
, bfd_elf_string_from_elf_section
6271 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
),
6272 input_bfd
, input_section
, rel
->r_offset
, TRUE
);
6274 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
6276 /* Relocate against local STT_GNU_IFUNC symbol. */
6277 if (!bfd_link_relocatable (info
)
6278 && ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
6280 h
= elfNN_aarch64_get_local_sym_hash (globals
, input_bfd
,
6285 /* Set STT_GNU_IFUNC symbol value. */
6286 h
->root
.u
.def
.value
= sym
->st_value
;
6287 h
->root
.u
.def
.section
= sec
;
6292 bfd_boolean warned
, ignored
;
6294 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
6295 r_symndx
, symtab_hdr
, sym_hashes
,
6297 unresolved_reloc
, warned
, ignored
);
6302 if (sec
!= NULL
&& discarded_section (sec
))
6303 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
6304 rel
, 1, relend
, howto
, 0, contents
);
6306 if (bfd_link_relocatable (info
))
6310 name
= h
->root
.root
.string
;
6313 name
= (bfd_elf_string_from_elf_section
6314 (input_bfd
, symtab_hdr
->sh_link
, sym
->st_name
));
6315 if (name
== NULL
|| *name
== '\0')
6316 name
= bfd_section_name (input_bfd
, sec
);
6320 && r_type
!= R_AARCH64_NONE
6321 && r_type
!= R_AARCH64_NULL
6323 || h
->root
.type
== bfd_link_hash_defined
6324 || h
->root
.type
== bfd_link_hash_defweak
)
6325 && IS_AARCH64_TLS_RELOC (bfd_r_type
) != (sym_type
== STT_TLS
))
6328 ((sym_type
== STT_TLS
6329 /* xgettext:c-format */
6330 ? _("%pB(%pA+%#" PRIx64
"): %s used with TLS symbol %s")
6331 /* xgettext:c-format */
6332 : _("%pB(%pA+%#" PRIx64
"): %s used with non-TLS symbol %s")),
6334 input_section
, (uint64_t) rel
->r_offset
, howto
->name
, name
);
6337 /* We relax only if we can see that there can be a valid transition
6338 from a reloc type to another.
6339 We call elfNN_aarch64_final_link_relocate unless we're completely
6340 done, i.e., the relaxation produced the final output we want. */
6342 relaxed_bfd_r_type
= aarch64_tls_transition (input_bfd
, info
, r_type
,
6344 if (relaxed_bfd_r_type
!= bfd_r_type
)
6346 bfd_r_type
= relaxed_bfd_r_type
;
6347 howto
= elfNN_aarch64_howto_from_bfd_reloc (bfd_r_type
);
6348 BFD_ASSERT (howto
!= NULL
);
6349 r_type
= howto
->type
;
6350 r
= elfNN_aarch64_tls_relax (globals
, input_bfd
, contents
, rel
, h
);
6351 unresolved_reloc
= 0;
6354 r
= bfd_reloc_continue
;
6356 /* There may be multiple consecutive relocations for the
6357 same offset. In that case we are supposed to treat the
6358 output of each relocation as the addend for the next. */
6359 if (rel
+ 1 < relend
6360 && rel
->r_offset
== rel
[1].r_offset
6361 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NONE
6362 && ELFNN_R_TYPE (rel
[1].r_info
) != R_AARCH64_NULL
)
6365 save_addend
= FALSE
;
6367 if (r
== bfd_reloc_continue
)
6368 r
= elfNN_aarch64_final_link_relocate (howto
, input_bfd
, output_bfd
,
6369 input_section
, contents
, rel
,
6370 relocation
, info
, sec
,
6371 h
, &unresolved_reloc
,
6372 save_addend
, &addend
, sym
);
6374 switch (elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
))
6376 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
6377 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
6378 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
6379 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
6380 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
6381 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
6382 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
6383 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
6384 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6386 bfd_boolean need_relocs
= FALSE
;
6391 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6392 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6395 (!bfd_link_executable (info
) || indx
!= 0) &&
6397 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6398 || h
->root
.type
!= bfd_link_hash_undefweak
);
6400 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6404 Elf_Internal_Rela rela
;
6405 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPMOD
));
6407 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
6408 globals
->root
.sgot
->output_offset
+ off
;
6411 loc
= globals
->root
.srelgot
->contents
;
6412 loc
+= globals
->root
.srelgot
->reloc_count
++
6413 * RELOC_SIZE (htab
);
6414 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6416 bfd_reloc_code_real_type real_type
=
6417 elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
6419 if (real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
6420 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
6421 || real_type
== BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
)
6423 /* For local dynamic, don't generate DTPREL in any case.
6424 Initialize the DTPREL slot into zero, so we get module
6425 base address when invoke runtime TLS resolver. */
6426 bfd_put_NN (output_bfd
, 0,
6427 globals
->root
.sgot
->contents
+ off
6432 bfd_put_NN (output_bfd
,
6433 relocation
- dtpoff_base (info
),
6434 globals
->root
.sgot
->contents
+ off
6439 /* This TLS symbol is global. We emit a
6440 relocation to fixup the tls offset at load
6443 ELFNN_R_INFO (indx
, AARCH64_R (TLS_DTPREL
));
6446 (globals
->root
.sgot
->output_section
->vma
6447 + globals
->root
.sgot
->output_offset
+ off
6450 loc
= globals
->root
.srelgot
->contents
;
6451 loc
+= globals
->root
.srelgot
->reloc_count
++
6452 * RELOC_SIZE (globals
);
6453 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6454 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6455 globals
->root
.sgot
->contents
+ off
6461 bfd_put_NN (output_bfd
, (bfd_vma
) 1,
6462 globals
->root
.sgot
->contents
+ off
);
6463 bfd_put_NN (output_bfd
,
6464 relocation
- dtpoff_base (info
),
6465 globals
->root
.sgot
->contents
+ off
6469 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6473 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
6474 case BFD_RELOC_AARCH64_TLSIE_LDNN_GOTTPREL_LO12_NC
:
6475 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
6476 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
6477 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
6478 if (! symbol_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6480 bfd_boolean need_relocs
= FALSE
;
6485 off
= symbol_got_offset (input_bfd
, h
, r_symndx
);
6487 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6490 (!bfd_link_executable (info
) || indx
!= 0) &&
6492 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6493 || h
->root
.type
!= bfd_link_hash_undefweak
);
6495 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6499 Elf_Internal_Rela rela
;
6502 rela
.r_addend
= relocation
- dtpoff_base (info
);
6506 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLS_TPREL
));
6507 rela
.r_offset
= globals
->root
.sgot
->output_section
->vma
+
6508 globals
->root
.sgot
->output_offset
+ off
;
6510 loc
= globals
->root
.srelgot
->contents
;
6511 loc
+= globals
->root
.srelgot
->reloc_count
++
6512 * RELOC_SIZE (htab
);
6514 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6516 bfd_put_NN (output_bfd
, rela
.r_addend
,
6517 globals
->root
.sgot
->contents
+ off
);
6520 bfd_put_NN (output_bfd
, relocation
- tpoff_base (info
),
6521 globals
->root
.sgot
->contents
+ off
);
6523 symbol_got_offset_mark (input_bfd
, h
, r_symndx
);
6527 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
6528 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
6529 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
6530 case BFD_RELOC_AARCH64_TLSDESC_LDNN_LO12_NC
:
6531 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
6532 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
6533 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
6534 if (! symbol_tlsdesc_got_offset_mark_p (input_bfd
, h
, r_symndx
))
6536 bfd_boolean need_relocs
= FALSE
;
6537 int indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
6538 bfd_vma off
= symbol_tlsdesc_got_offset (input_bfd
, h
, r_symndx
);
6540 need_relocs
= (h
== NULL
6541 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
6542 || h
->root
.type
!= bfd_link_hash_undefweak
);
6544 BFD_ASSERT (globals
->root
.srelgot
!= NULL
);
6545 BFD_ASSERT (globals
->root
.sgot
!= NULL
);
6550 Elf_Internal_Rela rela
;
6551 rela
.r_info
= ELFNN_R_INFO (indx
, AARCH64_R (TLSDESC
));
6554 rela
.r_offset
= (globals
->root
.sgotplt
->output_section
->vma
6555 + globals
->root
.sgotplt
->output_offset
6556 + off
+ globals
->sgotplt_jump_table_size
);
6559 rela
.r_addend
= relocation
- dtpoff_base (info
);
6561 /* Allocate the next available slot in the PLT reloc
6562 section to hold our R_AARCH64_TLSDESC, the next
6563 available slot is determined from reloc_count,
6564 which we step. But note, reloc_count was
6565 artifically moved down while allocating slots for
6566 real PLT relocs such that all of the PLT relocs
6567 will fit above the initial reloc_count and the
6568 extra stuff will fit below. */
6569 loc
= globals
->root
.srelplt
->contents
;
6570 loc
+= globals
->root
.srelplt
->reloc_count
++
6571 * RELOC_SIZE (globals
);
6573 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
6575 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6576 globals
->root
.sgotplt
->contents
+ off
+
6577 globals
->sgotplt_jump_table_size
);
6578 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
6579 globals
->root
.sgotplt
->contents
+ off
+
6580 globals
->sgotplt_jump_table_size
+
6584 symbol_tlsdesc_got_offset_mark (input_bfd
, h
, r_symndx
);
6591 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
6592 because such sections are not SEC_ALLOC and thus ld.so will
6593 not process them. */
6594 if (unresolved_reloc
6595 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
6597 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
6598 +rel
->r_offset
) != (bfd_vma
) - 1)
6601 /* xgettext:c-format */
6602 (_("%pB(%pA+%#" PRIx64
"): "
6603 "unresolvable %s relocation against symbol `%s'"),
6604 input_bfd
, input_section
, (uint64_t) rel
->r_offset
, howto
->name
,
6605 h
->root
.root
.string
);
6609 if (r
!= bfd_reloc_ok
&& r
!= bfd_reloc_continue
)
6611 bfd_reloc_code_real_type real_r_type
6612 = elfNN_aarch64_bfd_reloc_from_type (input_bfd
, r_type
);
6616 case bfd_reloc_overflow
:
6617 (*info
->callbacks
->reloc_overflow
)
6618 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
, (bfd_vma
) 0,
6619 input_bfd
, input_section
, rel
->r_offset
);
6620 if (real_r_type
== BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
6621 || real_r_type
== BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
)
6623 (*info
->callbacks
->warning
)
6625 _("too many GOT entries for -fpic, "
6626 "please recompile with -fPIC"),
6627 name
, input_bfd
, input_section
, rel
->r_offset
);
6630 /* Overflow can occur when a variable is referenced with a type
6631 that has a larger alignment than the type with which it was
6633 file1.c: extern int foo; int a (void) { return foo; }
6634 file2.c: char bar, foo, baz;
6635 If the variable is placed into a data section at an offset
6636 that is incompatible with the larger alignment requirement
6637 overflow will occur. (Strictly speaking this is not overflow
6638 but rather an alignment problem, but the bfd_reloc_ error
6639 enum does not have a value to cover that situation).
6641 Try to catch this situation here and provide a more helpful
6642 error message to the user. */
6643 if (addend
& ((1 << howto
->rightshift
) - 1)
6644 /* FIXME: Are we testing all of the appropriate reloc
6646 && (real_r_type
== BFD_RELOC_AARCH64_LD_LO19_PCREL
6647 || real_r_type
== BFD_RELOC_AARCH64_LDST16_LO12
6648 || real_r_type
== BFD_RELOC_AARCH64_LDST32_LO12
6649 || real_r_type
== BFD_RELOC_AARCH64_LDST64_LO12
6650 || real_r_type
== BFD_RELOC_AARCH64_LDST128_LO12
))
6652 info
->callbacks
->warning
6653 (info
, _("one possible cause of this error is that the \
6654 symbol is being referenced in the indicated code as if it had a larger \
6655 alignment than was declared where it was defined"),
6656 name
, input_bfd
, input_section
, rel
->r_offset
);
6660 case bfd_reloc_undefined
:
6661 (*info
->callbacks
->undefined_symbol
)
6662 (info
, name
, input_bfd
, input_section
, rel
->r_offset
, TRUE
);
6665 case bfd_reloc_outofrange
:
6666 error_message
= _("out of range");
6669 case bfd_reloc_notsupported
:
6670 error_message
= _("unsupported relocation");
6673 case bfd_reloc_dangerous
:
6674 /* error_message should already be set. */
6678 error_message
= _("unknown error");
6682 BFD_ASSERT (error_message
!= NULL
);
6683 (*info
->callbacks
->reloc_dangerous
)
6684 (info
, error_message
, input_bfd
, input_section
, rel
->r_offset
);
6696 /* Set the right machine number. */
6699 elfNN_aarch64_object_p (bfd
*abfd
)
6702 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64_ilp32
);
6704 bfd_default_set_arch_mach (abfd
, bfd_arch_aarch64
, bfd_mach_aarch64
);
6709 /* Function to keep AArch64 specific flags in the ELF header. */
6712 elfNN_aarch64_set_private_flags (bfd
*abfd
, flagword flags
)
6714 if (elf_flags_init (abfd
) && elf_elfheader (abfd
)->e_flags
!= flags
)
6719 elf_elfheader (abfd
)->e_flags
= flags
;
6720 elf_flags_init (abfd
) = TRUE
;
6726 /* Merge backend specific data from an object file to the output
6727 object file when linking. */
6730 elfNN_aarch64_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
6732 bfd
*obfd
= info
->output_bfd
;
6735 bfd_boolean flags_compatible
= TRUE
;
6738 /* Check if we have the same endianess. */
6739 if (!_bfd_generic_verify_endian_match (ibfd
, info
))
6742 if (!is_aarch64_elf (ibfd
) || !is_aarch64_elf (obfd
))
6745 /* The input BFD must have had its flags initialised. */
6746 /* The following seems bogus to me -- The flags are initialized in
6747 the assembler but I don't think an elf_flags_init field is
6748 written into the object. */
6749 /* BFD_ASSERT (elf_flags_init (ibfd)); */
6751 in_flags
= elf_elfheader (ibfd
)->e_flags
;
6752 out_flags
= elf_elfheader (obfd
)->e_flags
;
6754 if (!elf_flags_init (obfd
))
6756 /* If the input is the default architecture and had the default
6757 flags then do not bother setting the flags for the output
6758 architecture, instead allow future merges to do this. If no
6759 future merges ever set these flags then they will retain their
6760 uninitialised values, which surprise surprise, correspond
6761 to the default values. */
6762 if (bfd_get_arch_info (ibfd
)->the_default
6763 && elf_elfheader (ibfd
)->e_flags
== 0)
6766 elf_flags_init (obfd
) = TRUE
;
6767 elf_elfheader (obfd
)->e_flags
= in_flags
;
6769 if (bfd_get_arch (obfd
) == bfd_get_arch (ibfd
)
6770 && bfd_get_arch_info (obfd
)->the_default
)
6771 return bfd_set_arch_mach (obfd
, bfd_get_arch (ibfd
),
6772 bfd_get_mach (ibfd
));
6777 /* Identical flags must be compatible. */
6778 if (in_flags
== out_flags
)
6781 /* Check to see if the input BFD actually contains any sections. If
6782 not, its flags may not have been initialised either, but it
6783 cannot actually cause any incompatiblity. Do not short-circuit
6784 dynamic objects; their section list may be emptied by
6785 elf_link_add_object_symbols.
6787 Also check to see if there are no code sections in the input.
6788 In this case there is no need to check for code specific flags.
6789 XXX - do we need to worry about floating-point format compatability
6790 in data sections ? */
6791 if (!(ibfd
->flags
& DYNAMIC
))
6793 bfd_boolean null_input_bfd
= TRUE
;
6794 bfd_boolean only_data_sections
= TRUE
;
6796 for (sec
= ibfd
->sections
; sec
!= NULL
; sec
= sec
->next
)
6798 if ((bfd_get_section_flags (ibfd
, sec
)
6799 & (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
6800 == (SEC_LOAD
| SEC_CODE
| SEC_HAS_CONTENTS
))
6801 only_data_sections
= FALSE
;
6803 null_input_bfd
= FALSE
;
6807 if (null_input_bfd
|| only_data_sections
)
6811 return flags_compatible
;
6814 /* Display the flags field. */
6817 elfNN_aarch64_print_private_bfd_data (bfd
*abfd
, void *ptr
)
6819 FILE *file
= (FILE *) ptr
;
6820 unsigned long flags
;
6822 BFD_ASSERT (abfd
!= NULL
&& ptr
!= NULL
);
6824 /* Print normal ELF private data. */
6825 _bfd_elf_print_private_bfd_data (abfd
, ptr
);
6827 flags
= elf_elfheader (abfd
)->e_flags
;
6828 /* Ignore init flag - it may not be set, despite the flags field
6829 containing valid data. */
6831 /* xgettext:c-format */
6832 fprintf (file
, _("private flags = %lx:"), elf_elfheader (abfd
)->e_flags
);
6835 fprintf (file
, _("<Unrecognised flag bits set>"));
6842 /* Find dynamic relocs for H that apply to read-only sections. */
6845 readonly_dynrelocs (struct elf_link_hash_entry
*h
)
6847 struct elf_dyn_relocs
*p
;
6849 for (p
= elf_aarch64_hash_entry (h
)->dyn_relocs
; p
!= NULL
; p
= p
->next
)
6851 asection
*s
= p
->sec
->output_section
;
6853 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
6859 /* Return true if we need copy relocation against EH. */
6862 need_copy_relocation_p (struct elf_aarch64_link_hash_entry
*eh
)
6864 struct elf_dyn_relocs
*p
;
6867 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
6869 /* If there is any pc-relative reference, we need to keep copy relocation
6870 to avoid propagating the relocation into runtime that current glibc
6871 does not support. */
6875 s
= p
->sec
->output_section
;
6876 /* Need copy relocation if it's against read-only section. */
6877 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
6884 /* Adjust a symbol defined by a dynamic object and referenced by a
6885 regular object. The current definition is in some section of the
6886 dynamic object, but we're not including those sections. We have to
6887 change the definition to something the rest of the link can
6891 elfNN_aarch64_adjust_dynamic_symbol (struct bfd_link_info
*info
,
6892 struct elf_link_hash_entry
*h
)
6894 struct elf_aarch64_link_hash_table
*htab
;
6897 /* If this is a function, put it in the procedure linkage table. We
6898 will fill in the contents of the procedure linkage table later,
6899 when we know the address of the .got section. */
6900 if (h
->type
== STT_FUNC
|| h
->type
== STT_GNU_IFUNC
|| h
->needs_plt
)
6902 if (h
->plt
.refcount
<= 0
6903 || (h
->type
!= STT_GNU_IFUNC
6904 && (SYMBOL_CALLS_LOCAL (info
, h
)
6905 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
6906 && h
->root
.type
== bfd_link_hash_undefweak
))))
6908 /* This case can occur if we saw a CALL26 reloc in
6909 an input file, but the symbol wasn't referred to
6910 by a dynamic object or all references were
6911 garbage collected. In which case we can end up
6913 h
->plt
.offset
= (bfd_vma
) - 1;
6920 /* Otherwise, reset to -1. */
6921 h
->plt
.offset
= (bfd_vma
) - 1;
6924 /* If this is a weak symbol, and there is a real definition, the
6925 processor independent code will have arranged for us to see the
6926 real definition first, and we can just use the same value. */
6927 if (h
->is_weakalias
)
6929 struct elf_link_hash_entry
*def
= weakdef (h
);
6930 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
6931 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
6932 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
6933 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
6934 h
->non_got_ref
= def
->non_got_ref
;
6938 /* If we are creating a shared library, we must presume that the
6939 only references to the symbol are via the global offset table.
6940 For such cases we need not do anything here; the relocations will
6941 be handled correctly by relocate_section. */
6942 if (bfd_link_pic (info
))
6945 /* If there are no references to this symbol that do not use the
6946 GOT, we don't need to generate a copy reloc. */
6947 if (!h
->non_got_ref
)
6950 /* If -z nocopyreloc was given, we won't generate them either. */
6951 if (info
->nocopyreloc
)
6957 if (ELIMINATE_COPY_RELOCS
)
6959 struct elf_aarch64_link_hash_entry
*eh
;
6960 /* If we don't find any dynamic relocs in read-only sections, then
6961 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
6962 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
6963 if (!need_copy_relocation_p (eh
))
6970 /* We must allocate the symbol in our .dynbss section, which will
6971 become part of the .bss section of the executable. There will be
6972 an entry for this symbol in the .dynsym section. The dynamic
6973 object will contain position independent code, so all references
6974 from the dynamic object to this symbol will go through the global
6975 offset table. The dynamic linker will use the .dynsym entry to
6976 determine the address it must put in the global offset table, so
6977 both the dynamic object and the regular object will refer to the
6978 same memory location for the variable. */
6980 htab
= elf_aarch64_hash_table (info
);
6982 /* We must generate a R_AARCH64_COPY reloc to tell the dynamic linker
6983 to copy the initial value out of the dynamic object and into the
6984 runtime process image. */
6985 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
6987 s
= htab
->root
.sdynrelro
;
6988 srel
= htab
->root
.sreldynrelro
;
6992 s
= htab
->root
.sdynbss
;
6993 srel
= htab
->root
.srelbss
;
6995 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
6997 srel
->size
+= RELOC_SIZE (htab
);
7001 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
7006 elfNN_aarch64_allocate_local_symbols (bfd
*abfd
, unsigned number
)
7008 struct elf_aarch64_local_symbol
*locals
;
7009 locals
= elf_aarch64_locals (abfd
);
7012 locals
= (struct elf_aarch64_local_symbol
*)
7013 bfd_zalloc (abfd
, number
* sizeof (struct elf_aarch64_local_symbol
));
7016 elf_aarch64_locals (abfd
) = locals
;
7021 /* Create the .got section to hold the global offset table. */
7024 aarch64_elf_create_got_section (bfd
*abfd
, struct bfd_link_info
*info
)
7026 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7029 struct elf_link_hash_entry
*h
;
7030 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
7032 /* This function may be called more than once. */
7033 if (htab
->sgot
!= NULL
)
7036 flags
= bed
->dynamic_sec_flags
;
7038 s
= bfd_make_section_anyway_with_flags (abfd
,
7039 (bed
->rela_plts_and_copies_p
7040 ? ".rela.got" : ".rel.got"),
7041 (bed
->dynamic_sec_flags
7044 || ! bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
7048 s
= bfd_make_section_anyway_with_flags (abfd
, ".got", flags
);
7050 || !bfd_set_section_alignment (abfd
, s
, bed
->s
->log_file_align
))
7053 htab
->sgot
->size
+= GOT_ENTRY_SIZE
;
7055 if (bed
->want_got_sym
)
7057 /* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
7058 (or .got.plt) section. We don't do this in the linker script
7059 because we don't want to define the symbol if we are not creating
7060 a global offset table. */
7061 h
= _bfd_elf_define_linkage_sym (abfd
, info
, s
,
7062 "_GLOBAL_OFFSET_TABLE_");
7063 elf_hash_table (info
)->hgot
= h
;
7068 if (bed
->want_got_plt
)
7070 s
= bfd_make_section_anyway_with_flags (abfd
, ".got.plt", flags
);
7072 || !bfd_set_section_alignment (abfd
, s
,
7073 bed
->s
->log_file_align
))
7078 /* The first bit of the global offset table is the header. */
7079 s
->size
+= bed
->got_header_size
;
7084 /* Look through the relocs for a section during the first phase. */
7087 elfNN_aarch64_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
,
7088 asection
*sec
, const Elf_Internal_Rela
*relocs
)
7090 Elf_Internal_Shdr
*symtab_hdr
;
7091 struct elf_link_hash_entry
**sym_hashes
;
7092 const Elf_Internal_Rela
*rel
;
7093 const Elf_Internal_Rela
*rel_end
;
7096 struct elf_aarch64_link_hash_table
*htab
;
7098 if (bfd_link_relocatable (info
))
7101 BFD_ASSERT (is_aarch64_elf (abfd
));
7103 htab
= elf_aarch64_hash_table (info
);
7106 symtab_hdr
= &elf_symtab_hdr (abfd
);
7107 sym_hashes
= elf_sym_hashes (abfd
);
7109 rel_end
= relocs
+ sec
->reloc_count
;
7110 for (rel
= relocs
; rel
< rel_end
; rel
++)
7112 struct elf_link_hash_entry
*h
;
7113 unsigned int r_symndx
;
7114 unsigned int r_type
;
7115 bfd_reloc_code_real_type bfd_r_type
;
7116 Elf_Internal_Sym
*isym
;
7118 r_symndx
= ELFNN_R_SYM (rel
->r_info
);
7119 r_type
= ELFNN_R_TYPE (rel
->r_info
);
7121 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
7123 /* xgettext:c-format */
7124 _bfd_error_handler (_("%pB: bad symbol index: %d"), abfd
, r_symndx
);
7128 if (r_symndx
< symtab_hdr
->sh_info
)
7130 /* A local symbol. */
7131 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
7136 /* Check relocation against local STT_GNU_IFUNC symbol. */
7137 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
7139 h
= elfNN_aarch64_get_local_sym_hash (htab
, abfd
, rel
,
7144 /* Fake a STT_GNU_IFUNC symbol. */
7145 h
->type
= STT_GNU_IFUNC
;
7148 h
->forced_local
= 1;
7149 h
->root
.type
= bfd_link_hash_defined
;
7156 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
7157 while (h
->root
.type
== bfd_link_hash_indirect
7158 || h
->root
.type
== bfd_link_hash_warning
)
7159 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
7162 /* Could be done earlier, if h were already available. */
7163 bfd_r_type
= aarch64_tls_transition (abfd
, info
, r_type
, h
, r_symndx
);
7167 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
7168 This shows up in particular in an R_AARCH64_PREL64 in large model
7169 when calculating the pc-relative address to .got section which is
7170 used to initialize the gp register. */
7171 if (h
->root
.root
.string
7172 && strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0)
7174 if (htab
->root
.dynobj
== NULL
)
7175 htab
->root
.dynobj
= abfd
;
7177 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
7180 BFD_ASSERT (h
== htab
->root
.hgot
);
7183 /* Create the ifunc sections for static executables. If we
7184 never see an indirect function symbol nor we are building
7185 a static executable, those sections will be empty and
7186 won't appear in output. */
7192 case BFD_RELOC_AARCH64_ADD_LO12
:
7193 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
7194 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
7195 case BFD_RELOC_AARCH64_CALL26
:
7196 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
7197 case BFD_RELOC_AARCH64_JUMP26
:
7198 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
7199 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
7200 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
7201 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
7202 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
7203 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
7204 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
7205 case BFD_RELOC_AARCH64_NN
:
7206 if (htab
->root
.dynobj
== NULL
)
7207 htab
->root
.dynobj
= abfd
;
7208 if (!_bfd_elf_create_ifunc_sections (htab
->root
.dynobj
, info
))
7213 /* It is referenced by a non-shared object. */
7219 case BFD_RELOC_AARCH64_16
:
7221 case BFD_RELOC_AARCH64_32
:
7223 if (bfd_link_pic (info
) && (sec
->flags
& SEC_ALLOC
) != 0)
7226 /* This is an absolute symbol. It represents a value instead
7228 && ((h
->root
.type
== bfd_link_hash_defined
7229 && bfd_is_abs_section (h
->root
.u
.def
.section
))
7230 /* This is an undefined symbol. */
7231 || h
->root
.type
== bfd_link_hash_undefined
))
7234 /* For local symbols, defined global symbols in a non-ABS section,
7235 it is assumed that the value is an address. */
7236 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7238 /* xgettext:c-format */
7239 (_("%pB: relocation %s against `%s' can not be used when making "
7241 abfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
7242 (h
) ? h
->root
.root
.string
: "a local symbol");
7243 bfd_set_error (bfd_error_bad_value
);
7249 case BFD_RELOC_AARCH64_MOVW_G0_NC
:
7250 case BFD_RELOC_AARCH64_MOVW_G1_NC
:
7251 case BFD_RELOC_AARCH64_MOVW_G2_NC
:
7252 case BFD_RELOC_AARCH64_MOVW_G3
:
7253 if (bfd_link_pic (info
))
7255 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7257 /* xgettext:c-format */
7258 (_("%pB: relocation %s against `%s' can not be used when making "
7259 "a shared object; recompile with -fPIC"),
7260 abfd
, elfNN_aarch64_howto_table
[howto_index
].name
,
7261 (h
) ? h
->root
.root
.string
: "a local symbol");
7262 bfd_set_error (bfd_error_bad_value
);
7267 case BFD_RELOC_AARCH64_16_PCREL
:
7268 case BFD_RELOC_AARCH64_32_PCREL
:
7269 case BFD_RELOC_AARCH64_64_PCREL
:
7270 case BFD_RELOC_AARCH64_ADD_LO12
:
7271 case BFD_RELOC_AARCH64_ADR_HI21_NC_PCREL
:
7272 case BFD_RELOC_AARCH64_ADR_HI21_PCREL
:
7273 case BFD_RELOC_AARCH64_ADR_LO21_PCREL
:
7274 case BFD_RELOC_AARCH64_LDST128_LO12
:
7275 case BFD_RELOC_AARCH64_LDST16_LO12
:
7276 case BFD_RELOC_AARCH64_LDST32_LO12
:
7277 case BFD_RELOC_AARCH64_LDST64_LO12
:
7278 case BFD_RELOC_AARCH64_LDST8_LO12
:
7279 case BFD_RELOC_AARCH64_LD_LO19_PCREL
:
7280 if (h
== NULL
|| bfd_link_pic (info
))
7284 case BFD_RELOC_AARCH64_NN
:
7286 /* We don't need to handle relocs into sections not going into
7287 the "real" output. */
7288 if ((sec
->flags
& SEC_ALLOC
) == 0)
7293 if (!bfd_link_pic (info
))
7296 h
->plt
.refcount
+= 1;
7297 h
->pointer_equality_needed
= 1;
7300 /* No need to do anything if we're not creating a shared
7302 if (!(bfd_link_pic (info
)
7303 /* If on the other hand, we are creating an executable, we
7304 may need to keep relocations for symbols satisfied by a
7305 dynamic library if we manage to avoid copy relocs for the
7308 NOTE: Currently, there is no support of copy relocs
7309 elimination on pc-relative relocation types, because there is
7310 no dynamic relocation support for them in glibc. We still
7311 record the dynamic symbol reference for them. This is
7312 because one symbol may be referenced by both absolute
7313 relocation (for example, BFD_RELOC_AARCH64_NN) and
7314 pc-relative relocation. We need full symbol reference
7315 information to make correct decision later in
7316 elfNN_aarch64_adjust_dynamic_symbol. */
7317 || (ELIMINATE_COPY_RELOCS
7318 && !bfd_link_pic (info
)
7320 && (h
->root
.type
== bfd_link_hash_defweak
7321 || !h
->def_regular
))))
7325 struct elf_dyn_relocs
*p
;
7326 struct elf_dyn_relocs
**head
;
7327 int howto_index
= bfd_r_type
- BFD_RELOC_AARCH64_RELOC_START
;
7329 /* We must copy these reloc types into the output file.
7330 Create a reloc section in dynobj and make room for
7334 if (htab
->root
.dynobj
== NULL
)
7335 htab
->root
.dynobj
= abfd
;
7337 sreloc
= _bfd_elf_make_dynamic_reloc_section
7338 (sec
, htab
->root
.dynobj
, LOG_FILE_ALIGN
, abfd
, /*rela? */ TRUE
);
7344 /* If this is a global symbol, we count the number of
7345 relocations we need for this symbol. */
7348 struct elf_aarch64_link_hash_entry
*eh
;
7349 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
7350 head
= &eh
->dyn_relocs
;
7354 /* Track dynamic relocs needed for local syms too.
7355 We really need local syms available to do this
7361 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
7366 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
7370 /* Beware of type punned pointers vs strict aliasing
7372 vpp
= &(elf_section_data (s
)->local_dynrel
);
7373 head
= (struct elf_dyn_relocs
**) vpp
;
7377 if (p
== NULL
|| p
->sec
!= sec
)
7379 bfd_size_type amt
= sizeof *p
;
7380 p
= ((struct elf_dyn_relocs
*)
7381 bfd_zalloc (htab
->root
.dynobj
, amt
));
7391 if (elfNN_aarch64_howto_table
[howto_index
].pc_relative
)
7396 /* RR: We probably want to keep a consistency check that
7397 there are no dangling GOT_PAGE relocs. */
7398 case BFD_RELOC_AARCH64_ADR_GOT_PAGE
:
7399 case BFD_RELOC_AARCH64_GOT_LD_PREL19
:
7400 case BFD_RELOC_AARCH64_LD32_GOTPAGE_LO14
:
7401 case BFD_RELOC_AARCH64_LD32_GOT_LO12_NC
:
7402 case BFD_RELOC_AARCH64_LD64_GOTOFF_LO15
:
7403 case BFD_RELOC_AARCH64_LD64_GOTPAGE_LO15
:
7404 case BFD_RELOC_AARCH64_LD64_GOT_LO12_NC
:
7405 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC
:
7406 case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1
:
7407 case BFD_RELOC_AARCH64_TLSDESC_ADD_LO12
:
7408 case BFD_RELOC_AARCH64_TLSDESC_ADR_PAGE21
:
7409 case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21
:
7410 case BFD_RELOC_AARCH64_TLSDESC_LD32_LO12_NC
:
7411 case BFD_RELOC_AARCH64_TLSDESC_LD64_LO12
:
7412 case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19
:
7413 case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC
:
7414 case BFD_RELOC_AARCH64_TLSDESC_OFF_G1
:
7415 case BFD_RELOC_AARCH64_TLSGD_ADD_LO12_NC
:
7416 case BFD_RELOC_AARCH64_TLSGD_ADR_PAGE21
:
7417 case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21
:
7418 case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC
:
7419 case BFD_RELOC_AARCH64_TLSGD_MOVW_G1
:
7420 case BFD_RELOC_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21
:
7421 case BFD_RELOC_AARCH64_TLSIE_LD32_GOTTPREL_LO12_NC
:
7422 case BFD_RELOC_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC
:
7423 case BFD_RELOC_AARCH64_TLSIE_LD_GOTTPREL_PREL19
:
7424 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC
:
7425 case BFD_RELOC_AARCH64_TLSIE_MOVW_GOTTPREL_G1
:
7426 case BFD_RELOC_AARCH64_TLSLD_ADD_LO12_NC
:
7427 case BFD_RELOC_AARCH64_TLSLD_ADR_PAGE21
:
7428 case BFD_RELOC_AARCH64_TLSLD_ADR_PREL21
:
7429 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1
:
7430 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G1_NC
:
7431 case BFD_RELOC_AARCH64_TLSLE_MOVW_TPREL_G2
:
7434 unsigned old_got_type
;
7436 got_type
= aarch64_reloc_got_type (bfd_r_type
);
7440 h
->got
.refcount
+= 1;
7441 old_got_type
= elf_aarch64_hash_entry (h
)->got_type
;
7445 struct elf_aarch64_local_symbol
*locals
;
7447 if (!elfNN_aarch64_allocate_local_symbols
7448 (abfd
, symtab_hdr
->sh_info
))
7451 locals
= elf_aarch64_locals (abfd
);
7452 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7453 locals
[r_symndx
].got_refcount
+= 1;
7454 old_got_type
= locals
[r_symndx
].got_type
;
7457 /* If a variable is accessed with both general dynamic TLS
7458 methods, two slots may be created. */
7459 if (GOT_TLS_GD_ANY_P (old_got_type
) && GOT_TLS_GD_ANY_P (got_type
))
7460 got_type
|= old_got_type
;
7462 /* We will already have issued an error message if there
7463 is a TLS/non-TLS mismatch, based on the symbol type.
7464 So just combine any TLS types needed. */
7465 if (old_got_type
!= GOT_UNKNOWN
&& old_got_type
!= GOT_NORMAL
7466 && got_type
!= GOT_NORMAL
)
7467 got_type
|= old_got_type
;
7469 /* If the symbol is accessed by both IE and GD methods, we
7470 are able to relax. Turn off the GD flag, without
7471 messing up with any other kind of TLS types that may be
7473 if ((got_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (got_type
))
7474 got_type
&= ~ (GOT_TLSDESC_GD
| GOT_TLS_GD
);
7476 if (old_got_type
!= got_type
)
7479 elf_aarch64_hash_entry (h
)->got_type
= got_type
;
7482 struct elf_aarch64_local_symbol
*locals
;
7483 locals
= elf_aarch64_locals (abfd
);
7484 BFD_ASSERT (r_symndx
< symtab_hdr
->sh_info
);
7485 locals
[r_symndx
].got_type
= got_type
;
7489 if (htab
->root
.dynobj
== NULL
)
7490 htab
->root
.dynobj
= abfd
;
7491 if (! aarch64_elf_create_got_section (htab
->root
.dynobj
, info
))
7496 case BFD_RELOC_AARCH64_CALL26
:
7497 case BFD_RELOC_AARCH64_JUMP26
:
7498 /* If this is a local symbol then we resolve it
7499 directly without creating a PLT entry. */
7504 if (h
->plt
.refcount
<= 0)
7505 h
->plt
.refcount
= 1;
7507 h
->plt
.refcount
+= 1;
7518 /* Treat mapping symbols as special target symbols. */
7521 elfNN_aarch64_is_target_special_symbol (bfd
*abfd ATTRIBUTE_UNUSED
,
7524 return bfd_is_aarch64_special_symbol_name (sym
->name
,
7525 BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
);
7528 /* This is a copy of elf_find_function () from elf.c except that
7529 AArch64 mapping symbols are ignored when looking for function names. */
7532 aarch64_elf_find_function (bfd
*abfd ATTRIBUTE_UNUSED
,
7536 const char **filename_ptr
,
7537 const char **functionname_ptr
)
7539 const char *filename
= NULL
;
7540 asymbol
*func
= NULL
;
7541 bfd_vma low_func
= 0;
7544 for (p
= symbols
; *p
!= NULL
; p
++)
7548 q
= (elf_symbol_type
*) * p
;
7550 switch (ELF_ST_TYPE (q
->internal_elf_sym
.st_info
))
7555 filename
= bfd_asymbol_name (&q
->symbol
);
7559 /* Skip mapping symbols. */
7560 if ((q
->symbol
.flags
& BSF_LOCAL
)
7561 && (bfd_is_aarch64_special_symbol_name
7562 (q
->symbol
.name
, BFD_AARCH64_SPECIAL_SYM_TYPE_ANY
)))
7565 if (bfd_get_section (&q
->symbol
) == section
7566 && q
->symbol
.value
>= low_func
&& q
->symbol
.value
<= offset
)
7568 func
= (asymbol
*) q
;
7569 low_func
= q
->symbol
.value
;
7579 *filename_ptr
= filename
;
7580 if (functionname_ptr
)
7581 *functionname_ptr
= bfd_asymbol_name (func
);
7587 /* Find the nearest line to a particular section and offset, for error
7588 reporting. This code is a duplicate of the code in elf.c, except
7589 that it uses aarch64_elf_find_function. */
7592 elfNN_aarch64_find_nearest_line (bfd
*abfd
,
7596 const char **filename_ptr
,
7597 const char **functionname_ptr
,
7598 unsigned int *line_ptr
,
7599 unsigned int *discriminator_ptr
)
7601 bfd_boolean found
= FALSE
;
7603 if (_bfd_dwarf2_find_nearest_line (abfd
, symbols
, NULL
, section
, offset
,
7604 filename_ptr
, functionname_ptr
,
7605 line_ptr
, discriminator_ptr
,
7606 dwarf_debug_sections
, 0,
7607 &elf_tdata (abfd
)->dwarf2_find_line_info
))
7609 if (!*functionname_ptr
)
7610 aarch64_elf_find_function (abfd
, symbols
, section
, offset
,
7611 *filename_ptr
? NULL
: filename_ptr
,
7617 /* Skip _bfd_dwarf1_find_nearest_line since no known AArch64
7618 toolchain uses DWARF1. */
7620 if (!_bfd_stab_section_find_nearest_line (abfd
, symbols
, section
, offset
,
7621 &found
, filename_ptr
,
7622 functionname_ptr
, line_ptr
,
7623 &elf_tdata (abfd
)->line_info
))
7626 if (found
&& (*functionname_ptr
|| *line_ptr
))
7629 if (symbols
== NULL
)
7632 if (!aarch64_elf_find_function (abfd
, symbols
, section
, offset
,
7633 filename_ptr
, functionname_ptr
))
7641 elfNN_aarch64_find_inliner_info (bfd
*abfd
,
7642 const char **filename_ptr
,
7643 const char **functionname_ptr
,
7644 unsigned int *line_ptr
)
7647 found
= _bfd_dwarf2_find_inliner_info
7648 (abfd
, filename_ptr
,
7649 functionname_ptr
, line_ptr
, &elf_tdata (abfd
)->dwarf2_find_line_info
);
7655 elfNN_aarch64_post_process_headers (bfd
*abfd
,
7656 struct bfd_link_info
*link_info
)
7658 Elf_Internal_Ehdr
*i_ehdrp
; /* ELF file header, internal form. */
7660 i_ehdrp
= elf_elfheader (abfd
);
7661 i_ehdrp
->e_ident
[EI_ABIVERSION
] = AARCH64_ELF_ABI_VERSION
;
7663 _bfd_elf_post_process_headers (abfd
, link_info
);
7666 static enum elf_reloc_type_class
7667 elfNN_aarch64_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
7668 const asection
*rel_sec ATTRIBUTE_UNUSED
,
7669 const Elf_Internal_Rela
*rela
)
7671 struct elf_aarch64_link_hash_table
*htab
= elf_aarch64_hash_table (info
);
7673 if (htab
->root
.dynsym
!= NULL
7674 && htab
->root
.dynsym
->contents
!= NULL
)
7676 /* Check relocation against STT_GNU_IFUNC symbol if there are
7678 bfd
*abfd
= info
->output_bfd
;
7679 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
7680 unsigned long r_symndx
= ELFNN_R_SYM (rela
->r_info
);
7681 if (r_symndx
!= STN_UNDEF
)
7683 Elf_Internal_Sym sym
;
7684 if (!bed
->s
->swap_symbol_in (abfd
,
7685 (htab
->root
.dynsym
->contents
7686 + r_symndx
* bed
->s
->sizeof_sym
),
7689 /* xgettext:c-format */
7690 _bfd_error_handler (_("%pB symbol number %lu references"
7691 " nonexistent SHT_SYMTAB_SHNDX section"),
7693 /* Ideally an error class should be returned here. */
7695 else if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
7696 return reloc_class_ifunc
;
7700 switch ((int) ELFNN_R_TYPE (rela
->r_info
))
7702 case AARCH64_R (IRELATIVE
):
7703 return reloc_class_ifunc
;
7704 case AARCH64_R (RELATIVE
):
7705 return reloc_class_relative
;
7706 case AARCH64_R (JUMP_SLOT
):
7707 return reloc_class_plt
;
7708 case AARCH64_R (COPY
):
7709 return reloc_class_copy
;
7711 return reloc_class_normal
;
7715 /* Handle an AArch64 specific section when reading an object file. This is
7716 called when bfd_section_from_shdr finds a section with an unknown
7720 elfNN_aarch64_section_from_shdr (bfd
*abfd
,
7721 Elf_Internal_Shdr
*hdr
,
7722 const char *name
, int shindex
)
7724 /* There ought to be a place to keep ELF backend specific flags, but
7725 at the moment there isn't one. We just keep track of the
7726 sections by their name, instead. Fortunately, the ABI gives
7727 names for all the AArch64 specific sections, so we will probably get
7729 switch (hdr
->sh_type
)
7731 case SHT_AARCH64_ATTRIBUTES
:
7738 if (!_bfd_elf_make_section_from_shdr (abfd
, hdr
, name
, shindex
))
7744 /* A structure used to record a list of sections, independently
7745 of the next and prev fields in the asection structure. */
7746 typedef struct section_list
7749 struct section_list
*next
;
7750 struct section_list
*prev
;
7754 /* Unfortunately we need to keep a list of sections for which
7755 an _aarch64_elf_section_data structure has been allocated. This
7756 is because it is possible for functions like elfNN_aarch64_write_section
7757 to be called on a section which has had an elf_data_structure
7758 allocated for it (and so the used_by_bfd field is valid) but
7759 for which the AArch64 extended version of this structure - the
7760 _aarch64_elf_section_data structure - has not been allocated. */
7761 static section_list
*sections_with_aarch64_elf_section_data
= NULL
;
7764 record_section_with_aarch64_elf_section_data (asection
*sec
)
7766 struct section_list
*entry
;
7768 entry
= bfd_malloc (sizeof (*entry
));
7772 entry
->next
= sections_with_aarch64_elf_section_data
;
7774 if (entry
->next
!= NULL
)
7775 entry
->next
->prev
= entry
;
7776 sections_with_aarch64_elf_section_data
= entry
;
7779 static struct section_list
*
7780 find_aarch64_elf_section_entry (asection
*sec
)
7782 struct section_list
*entry
;
7783 static struct section_list
*last_entry
= NULL
;
7785 /* This is a short cut for the typical case where the sections are added
7786 to the sections_with_aarch64_elf_section_data list in forward order and
7787 then looked up here in backwards order. This makes a real difference
7788 to the ld-srec/sec64k.exp linker test. */
7789 entry
= sections_with_aarch64_elf_section_data
;
7790 if (last_entry
!= NULL
)
7792 if (last_entry
->sec
== sec
)
7794 else if (last_entry
->next
!= NULL
&& last_entry
->next
->sec
== sec
)
7795 entry
= last_entry
->next
;
7798 for (; entry
; entry
= entry
->next
)
7799 if (entry
->sec
== sec
)
7803 /* Record the entry prior to this one - it is the entry we are
7804 most likely to want to locate next time. Also this way if we
7805 have been called from
7806 unrecord_section_with_aarch64_elf_section_data () we will not
7807 be caching a pointer that is about to be freed. */
7808 last_entry
= entry
->prev
;
7814 unrecord_section_with_aarch64_elf_section_data (asection
*sec
)
7816 struct section_list
*entry
;
7818 entry
= find_aarch64_elf_section_entry (sec
);
7822 if (entry
->prev
!= NULL
)
7823 entry
->prev
->next
= entry
->next
;
7824 if (entry
->next
!= NULL
)
7825 entry
->next
->prev
= entry
->prev
;
7826 if (entry
== sections_with_aarch64_elf_section_data
)
7827 sections_with_aarch64_elf_section_data
= entry
->next
;
7836 struct bfd_link_info
*info
;
7839 int (*func
) (void *, const char *, Elf_Internal_Sym
*,
7840 asection
*, struct elf_link_hash_entry
*);
7841 } output_arch_syminfo
;
7843 enum map_symbol_type
7850 /* Output a single mapping symbol. */
7853 elfNN_aarch64_output_map_sym (output_arch_syminfo
*osi
,
7854 enum map_symbol_type type
, bfd_vma offset
)
7856 static const char *names
[2] = { "$x", "$d" };
7857 Elf_Internal_Sym sym
;
7859 sym
.st_value
= (osi
->sec
->output_section
->vma
7860 + osi
->sec
->output_offset
+ offset
);
7863 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_NOTYPE
);
7864 sym
.st_shndx
= osi
->sec_shndx
;
7865 return osi
->func (osi
->finfo
, names
[type
], &sym
, osi
->sec
, NULL
) == 1;
7868 /* Output a single local symbol for a generated stub. */
7871 elfNN_aarch64_output_stub_sym (output_arch_syminfo
*osi
, const char *name
,
7872 bfd_vma offset
, bfd_vma size
)
7874 Elf_Internal_Sym sym
;
7876 sym
.st_value
= (osi
->sec
->output_section
->vma
7877 + osi
->sec
->output_offset
+ offset
);
7880 sym
.st_info
= ELF_ST_INFO (STB_LOCAL
, STT_FUNC
);
7881 sym
.st_shndx
= osi
->sec_shndx
;
7882 return osi
->func (osi
->finfo
, name
, &sym
, osi
->sec
, NULL
) == 1;
7886 aarch64_map_one_stub (struct bfd_hash_entry
*gen_entry
, void *in_arg
)
7888 struct elf_aarch64_stub_hash_entry
*stub_entry
;
7892 output_arch_syminfo
*osi
;
7894 /* Massage our args to the form they really have. */
7895 stub_entry
= (struct elf_aarch64_stub_hash_entry
*) gen_entry
;
7896 osi
= (output_arch_syminfo
*) in_arg
;
7898 stub_sec
= stub_entry
->stub_sec
;
7900 /* Ensure this stub is attached to the current section being
7902 if (stub_sec
!= osi
->sec
)
7905 addr
= (bfd_vma
) stub_entry
->stub_offset
;
7907 stub_name
= stub_entry
->output_name
;
7909 switch (stub_entry
->stub_type
)
7911 case aarch64_stub_adrp_branch
:
7912 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
7913 sizeof (aarch64_adrp_branch_stub
)))
7915 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7918 case aarch64_stub_long_branch
:
7919 if (!elfNN_aarch64_output_stub_sym
7920 (osi
, stub_name
, addr
, sizeof (aarch64_long_branch_stub
)))
7922 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7924 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_DATA
, addr
+ 16))
7927 case aarch64_stub_erratum_835769_veneer
:
7928 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
7929 sizeof (aarch64_erratum_835769_stub
)))
7931 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7934 case aarch64_stub_erratum_843419_veneer
:
7935 if (!elfNN_aarch64_output_stub_sym (osi
, stub_name
, addr
,
7936 sizeof (aarch64_erratum_843419_stub
)))
7938 if (!elfNN_aarch64_output_map_sym (osi
, AARCH64_MAP_INSN
, addr
))
7949 /* Output mapping symbols for linker generated sections. */
7952 elfNN_aarch64_output_arch_local_syms (bfd
*output_bfd
,
7953 struct bfd_link_info
*info
,
7955 int (*func
) (void *, const char *,
7958 struct elf_link_hash_entry
7961 output_arch_syminfo osi
;
7962 struct elf_aarch64_link_hash_table
*htab
;
7964 htab
= elf_aarch64_hash_table (info
);
7970 /* Long calls stubs. */
7971 if (htab
->stub_bfd
&& htab
->stub_bfd
->sections
)
7975 for (stub_sec
= htab
->stub_bfd
->sections
;
7976 stub_sec
!= NULL
; stub_sec
= stub_sec
->next
)
7978 /* Ignore non-stub sections. */
7979 if (!strstr (stub_sec
->name
, STUB_SUFFIX
))
7984 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
7985 (output_bfd
, osi
.sec
->output_section
);
7987 /* The first instruction in a stub is always a branch. */
7988 if (!elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0))
7991 bfd_hash_traverse (&htab
->stub_hash_table
, aarch64_map_one_stub
,
7996 /* Finally, output mapping symbols for the PLT. */
7997 if (!htab
->root
.splt
|| htab
->root
.splt
->size
== 0)
8000 osi
.sec_shndx
= _bfd_elf_section_from_bfd_section
8001 (output_bfd
, htab
->root
.splt
->output_section
);
8002 osi
.sec
= htab
->root
.splt
;
8004 elfNN_aarch64_output_map_sym (&osi
, AARCH64_MAP_INSN
, 0);
8010 /* Allocate target specific section data. */
8013 elfNN_aarch64_new_section_hook (bfd
*abfd
, asection
*sec
)
8015 if (!sec
->used_by_bfd
)
8017 _aarch64_elf_section_data
*sdata
;
8018 bfd_size_type amt
= sizeof (*sdata
);
8020 sdata
= bfd_zalloc (abfd
, amt
);
8023 sec
->used_by_bfd
= sdata
;
8026 record_section_with_aarch64_elf_section_data (sec
);
8028 return _bfd_elf_new_section_hook (abfd
, sec
);
8033 unrecord_section_via_map_over_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
8035 void *ignore ATTRIBUTE_UNUSED
)
8037 unrecord_section_with_aarch64_elf_section_data (sec
);
8041 elfNN_aarch64_close_and_cleanup (bfd
*abfd
)
8044 bfd_map_over_sections (abfd
,
8045 unrecord_section_via_map_over_sections
, NULL
);
8047 return _bfd_elf_close_and_cleanup (abfd
);
8051 elfNN_aarch64_bfd_free_cached_info (bfd
*abfd
)
8054 bfd_map_over_sections (abfd
,
8055 unrecord_section_via_map_over_sections
, NULL
);
8057 return _bfd_free_cached_info (abfd
);
8060 /* Create dynamic sections. This is different from the ARM backend in that
8061 the got, plt, gotplt and their relocation sections are all created in the
8062 standard part of the bfd elf backend. */
8065 elfNN_aarch64_create_dynamic_sections (bfd
*dynobj
,
8066 struct bfd_link_info
*info
)
8068 /* We need to create .got section. */
8069 if (!aarch64_elf_create_got_section (dynobj
, info
))
8072 return _bfd_elf_create_dynamic_sections (dynobj
, info
);
8076 /* Allocate space in .plt, .got and associated reloc sections for
8080 elfNN_aarch64_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
8082 struct bfd_link_info
*info
;
8083 struct elf_aarch64_link_hash_table
*htab
;
8084 struct elf_aarch64_link_hash_entry
*eh
;
8085 struct elf_dyn_relocs
*p
;
8087 /* An example of a bfd_link_hash_indirect symbol is versioned
8088 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8089 -> __gxx_personality_v0(bfd_link_hash_defined)
8091 There is no need to process bfd_link_hash_indirect symbols here
8092 because we will also be presented with the concrete instance of
8093 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8094 called to copy all relevant data from the generic to the concrete
8096 if (h
->root
.type
== bfd_link_hash_indirect
)
8099 if (h
->root
.type
== bfd_link_hash_warning
)
8100 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8102 info
= (struct bfd_link_info
*) inf
;
8103 htab
= elf_aarch64_hash_table (info
);
8105 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8106 here if it is defined and referenced in a non-shared object. */
8107 if (h
->type
== STT_GNU_IFUNC
8110 else if (htab
->root
.dynamic_sections_created
&& h
->plt
.refcount
> 0)
8112 /* Make sure this symbol is output as a dynamic symbol.
8113 Undefined weak syms won't yet be marked as dynamic. */
8114 if (h
->dynindx
== -1 && !h
->forced_local
8115 && h
->root
.type
== bfd_link_hash_undefweak
)
8117 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
8121 if (bfd_link_pic (info
) || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
8123 asection
*s
= htab
->root
.splt
;
8125 /* If this is the first .plt entry, make room for the special
8128 s
->size
+= htab
->plt_header_size
;
8130 h
->plt
.offset
= s
->size
;
8132 /* If this symbol is not defined in a regular file, and we are
8133 not generating a shared library, then set the symbol to this
8134 location in the .plt. This is required to make function
8135 pointers compare as equal between the normal executable and
8136 the shared library. */
8137 if (!bfd_link_pic (info
) && !h
->def_regular
)
8139 h
->root
.u
.def
.section
= s
;
8140 h
->root
.u
.def
.value
= h
->plt
.offset
;
8143 /* Make room for this entry. For now we only create the
8144 small model PLT entries. We later need to find a way
8145 of relaxing into these from the large model PLT entries. */
8146 s
->size
+= PLT_SMALL_ENTRY_SIZE
;
8148 /* We also need to make an entry in the .got.plt section, which
8149 will be placed in the .got section by the linker script. */
8150 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
8152 /* We also need to make an entry in the .rela.plt section. */
8153 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8155 /* We need to ensure that all GOT entries that serve the PLT
8156 are consecutive with the special GOT slots [0] [1] and
8157 [2]. Any addtional relocations, such as
8158 R_AARCH64_TLSDESC, must be placed after the PLT related
8159 entries. We abuse the reloc_count such that during
8160 sizing we adjust reloc_count to indicate the number of
8161 PLT related reserved entries. In subsequent phases when
8162 filling in the contents of the reloc entries, PLT related
8163 entries are placed by computing their PLT index (0
8164 .. reloc_count). While other none PLT relocs are placed
8165 at the slot indicated by reloc_count and reloc_count is
8168 htab
->root
.srelplt
->reloc_count
++;
8172 h
->plt
.offset
= (bfd_vma
) - 1;
8178 h
->plt
.offset
= (bfd_vma
) - 1;
8182 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
8183 eh
->tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
8185 if (h
->got
.refcount
> 0)
8188 unsigned got_type
= elf_aarch64_hash_entry (h
)->got_type
;
8190 h
->got
.offset
= (bfd_vma
) - 1;
8192 dyn
= htab
->root
.dynamic_sections_created
;
8194 /* Make sure this symbol is output as a dynamic symbol.
8195 Undefined weak syms won't yet be marked as dynamic. */
8196 if (dyn
&& h
->dynindx
== -1 && !h
->forced_local
8197 && h
->root
.type
== bfd_link_hash_undefweak
)
8199 if (!bfd_elf_link_record_dynamic_symbol (info
, h
))
8203 if (got_type
== GOT_UNKNOWN
)
8206 else if (got_type
== GOT_NORMAL
)
8208 h
->got
.offset
= htab
->root
.sgot
->size
;
8209 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8210 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8211 || h
->root
.type
!= bfd_link_hash_undefweak
)
8212 && (bfd_link_pic (info
)
8213 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
))
8214 /* Undefined weak symbol in static PIE resolves to 0 without
8215 any dynamic relocations. */
8216 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
8218 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8224 if (got_type
& GOT_TLSDESC_GD
)
8226 eh
->tlsdesc_got_jump_table_offset
=
8227 (htab
->root
.sgotplt
->size
8228 - aarch64_compute_jump_table_size (htab
));
8229 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
8230 h
->got
.offset
= (bfd_vma
) - 2;
8233 if (got_type
& GOT_TLS_GD
)
8235 h
->got
.offset
= htab
->root
.sgot
->size
;
8236 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
8239 if (got_type
& GOT_TLS_IE
)
8241 h
->got
.offset
= htab
->root
.sgot
->size
;
8242 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8245 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
8246 if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
8247 || h
->root
.type
!= bfd_link_hash_undefweak
)
8248 && (!bfd_link_executable (info
)
8250 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
8252 if (got_type
& GOT_TLSDESC_GD
)
8254 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8255 /* Note reloc_count not incremented here! We have
8256 already adjusted reloc_count for this relocation
8259 /* TLSDESC PLT is now needed, but not yet determined. */
8260 htab
->tlsdesc_plt
= (bfd_vma
) - 1;
8263 if (got_type
& GOT_TLS_GD
)
8264 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
8266 if (got_type
& GOT_TLS_IE
)
8267 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8273 h
->got
.offset
= (bfd_vma
) - 1;
8276 if (eh
->dyn_relocs
== NULL
)
8279 /* In the shared -Bsymbolic case, discard space allocated for
8280 dynamic pc-relative relocs against symbols which turn out to be
8281 defined in regular objects. For the normal shared case, discard
8282 space for pc-relative relocs that have become local due to symbol
8283 visibility changes. */
8285 if (bfd_link_pic (info
))
8287 /* Relocs that use pc_count are those that appear on a call
8288 insn, or certain REL relocs that can generated via assembly.
8289 We want calls to protected symbols to resolve directly to the
8290 function rather than going via the plt. If people want
8291 function pointer comparisons to work as expected then they
8292 should avoid writing weird assembly. */
8293 if (SYMBOL_CALLS_LOCAL (info
, h
))
8295 struct elf_dyn_relocs
**pp
;
8297 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
;)
8299 p
->count
-= p
->pc_count
;
8308 /* Also discard relocs on undefined weak syms with non-default
8310 if (eh
->dyn_relocs
!= NULL
&& h
->root
.type
== bfd_link_hash_undefweak
)
8312 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
8313 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
8314 eh
->dyn_relocs
= NULL
;
8316 /* Make sure undefined weak symbols are output as a dynamic
8318 else if (h
->dynindx
== -1
8320 && h
->root
.type
== bfd_link_hash_undefweak
8321 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
8326 else if (ELIMINATE_COPY_RELOCS
)
8328 /* For the non-shared case, discard space for relocs against
8329 symbols which turn out to need copy relocs or are not
8335 || (htab
->root
.dynamic_sections_created
8336 && (h
->root
.type
== bfd_link_hash_undefweak
8337 || h
->root
.type
== bfd_link_hash_undefined
))))
8339 /* Make sure this symbol is output as a dynamic symbol.
8340 Undefined weak syms won't yet be marked as dynamic. */
8341 if (h
->dynindx
== -1
8343 && h
->root
.type
== bfd_link_hash_undefweak
8344 && !bfd_elf_link_record_dynamic_symbol (info
, h
))
8347 /* If that succeeded, we know we'll be keeping all the
8349 if (h
->dynindx
!= -1)
8353 eh
->dyn_relocs
= NULL
;
8358 /* Finally, allocate space. */
8359 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
8363 sreloc
= elf_section_data (p
->sec
)->sreloc
;
8365 BFD_ASSERT (sreloc
!= NULL
);
8367 sreloc
->size
+= p
->count
* RELOC_SIZE (htab
);
8373 /* Allocate space in .plt, .got and associated reloc sections for
8374 ifunc dynamic relocs. */
8377 elfNN_aarch64_allocate_ifunc_dynrelocs (struct elf_link_hash_entry
*h
,
8380 struct bfd_link_info
*info
;
8381 struct elf_aarch64_link_hash_table
*htab
;
8382 struct elf_aarch64_link_hash_entry
*eh
;
8384 /* An example of a bfd_link_hash_indirect symbol is versioned
8385 symbol. For example: __gxx_personality_v0(bfd_link_hash_indirect)
8386 -> __gxx_personality_v0(bfd_link_hash_defined)
8388 There is no need to process bfd_link_hash_indirect symbols here
8389 because we will also be presented with the concrete instance of
8390 the symbol and elfNN_aarch64_copy_indirect_symbol () will have been
8391 called to copy all relevant data from the generic to the concrete
8393 if (h
->root
.type
== bfd_link_hash_indirect
)
8396 if (h
->root
.type
== bfd_link_hash_warning
)
8397 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
8399 info
= (struct bfd_link_info
*) inf
;
8400 htab
= elf_aarch64_hash_table (info
);
8402 eh
= (struct elf_aarch64_link_hash_entry
*) h
;
8404 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
8405 here if it is defined and referenced in a non-shared object. */
8406 if (h
->type
== STT_GNU_IFUNC
8408 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
8411 htab
->plt_entry_size
,
8412 htab
->plt_header_size
,
8418 /* Allocate space in .plt, .got and associated reloc sections for
8419 local dynamic relocs. */
8422 elfNN_aarch64_allocate_local_dynrelocs (void **slot
, void *inf
)
8424 struct elf_link_hash_entry
*h
8425 = (struct elf_link_hash_entry
*) *slot
;
8427 if (h
->type
!= STT_GNU_IFUNC
8431 || h
->root
.type
!= bfd_link_hash_defined
)
8434 return elfNN_aarch64_allocate_dynrelocs (h
, inf
);
8437 /* Allocate space in .plt, .got and associated reloc sections for
8438 local ifunc dynamic relocs. */
8441 elfNN_aarch64_allocate_local_ifunc_dynrelocs (void **slot
, void *inf
)
8443 struct elf_link_hash_entry
*h
8444 = (struct elf_link_hash_entry
*) *slot
;
8446 if (h
->type
!= STT_GNU_IFUNC
8450 || h
->root
.type
!= bfd_link_hash_defined
)
8453 return elfNN_aarch64_allocate_ifunc_dynrelocs (h
, inf
);
8456 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
8457 read-only sections. */
8460 maybe_set_textrel (struct elf_link_hash_entry
*h
, void *info_p
)
8464 if (h
->root
.type
== bfd_link_hash_indirect
)
8467 sec
= readonly_dynrelocs (h
);
8470 struct bfd_link_info
*info
= (struct bfd_link_info
*) info_p
;
8472 info
->flags
|= DF_TEXTREL
;
8473 info
->callbacks
->minfo
8474 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
8475 sec
->owner
, h
->root
.root
.string
, sec
);
8477 /* Not an error, just cut short the traversal. */
8483 /* This is the most important function of all . Innocuosly named
8487 elfNN_aarch64_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
8488 struct bfd_link_info
*info
)
8490 struct elf_aarch64_link_hash_table
*htab
;
8496 htab
= elf_aarch64_hash_table ((info
));
8497 dynobj
= htab
->root
.dynobj
;
8499 BFD_ASSERT (dynobj
!= NULL
);
8501 if (htab
->root
.dynamic_sections_created
)
8503 if (bfd_link_executable (info
) && !info
->nointerp
)
8505 s
= bfd_get_linker_section (dynobj
, ".interp");
8508 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
8509 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
8513 /* Set up .got offsets for local syms, and space for local dynamic
8515 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
8517 struct elf_aarch64_local_symbol
*locals
= NULL
;
8518 Elf_Internal_Shdr
*symtab_hdr
;
8522 if (!is_aarch64_elf (ibfd
))
8525 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
8527 struct elf_dyn_relocs
*p
;
8529 for (p
= (struct elf_dyn_relocs
*)
8530 (elf_section_data (s
)->local_dynrel
); p
!= NULL
; p
= p
->next
)
8532 if (!bfd_is_abs_section (p
->sec
)
8533 && bfd_is_abs_section (p
->sec
->output_section
))
8535 /* Input section has been discarded, either because
8536 it is a copy of a linkonce section or due to
8537 linker script /DISCARD/, so we'll be discarding
8540 else if (p
->count
!= 0)
8542 srel
= elf_section_data (p
->sec
)->sreloc
;
8543 srel
->size
+= p
->count
* RELOC_SIZE (htab
);
8544 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
8545 info
->flags
|= DF_TEXTREL
;
8550 locals
= elf_aarch64_locals (ibfd
);
8554 symtab_hdr
= &elf_symtab_hdr (ibfd
);
8555 srel
= htab
->root
.srelgot
;
8556 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
8558 locals
[i
].got_offset
= (bfd_vma
) - 1;
8559 locals
[i
].tlsdesc_got_jump_table_offset
= (bfd_vma
) - 1;
8560 if (locals
[i
].got_refcount
> 0)
8562 unsigned got_type
= locals
[i
].got_type
;
8563 if (got_type
& GOT_TLSDESC_GD
)
8565 locals
[i
].tlsdesc_got_jump_table_offset
=
8566 (htab
->root
.sgotplt
->size
8567 - aarch64_compute_jump_table_size (htab
));
8568 htab
->root
.sgotplt
->size
+= GOT_ENTRY_SIZE
* 2;
8569 locals
[i
].got_offset
= (bfd_vma
) - 2;
8572 if (got_type
& GOT_TLS_GD
)
8574 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8575 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
* 2;
8578 if (got_type
& GOT_TLS_IE
8579 || got_type
& GOT_NORMAL
)
8581 locals
[i
].got_offset
= htab
->root
.sgot
->size
;
8582 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8585 if (got_type
== GOT_UNKNOWN
)
8589 if (bfd_link_pic (info
))
8591 if (got_type
& GOT_TLSDESC_GD
)
8593 htab
->root
.srelplt
->size
+= RELOC_SIZE (htab
);
8594 /* Note RELOC_COUNT not incremented here! */
8595 htab
->tlsdesc_plt
= (bfd_vma
) - 1;
8598 if (got_type
& GOT_TLS_GD
)
8599 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
) * 2;
8601 if (got_type
& GOT_TLS_IE
8602 || got_type
& GOT_NORMAL
)
8603 htab
->root
.srelgot
->size
+= RELOC_SIZE (htab
);
8608 locals
[i
].got_refcount
= (bfd_vma
) - 1;
8614 /* Allocate global sym .plt and .got entries, and space for global
8615 sym dynamic relocs. */
8616 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_dynrelocs
,
8619 /* Allocate global ifunc sym .plt and .got entries, and space for global
8620 ifunc sym dynamic relocs. */
8621 elf_link_hash_traverse (&htab
->root
, elfNN_aarch64_allocate_ifunc_dynrelocs
,
8624 /* Allocate .plt and .got entries, and space for local symbols. */
8625 htab_traverse (htab
->loc_hash_table
,
8626 elfNN_aarch64_allocate_local_dynrelocs
,
8629 /* Allocate .plt and .got entries, and space for local ifunc symbols. */
8630 htab_traverse (htab
->loc_hash_table
,
8631 elfNN_aarch64_allocate_local_ifunc_dynrelocs
,
8634 /* For every jump slot reserved in the sgotplt, reloc_count is
8635 incremented. However, when we reserve space for TLS descriptors,
8636 it's not incremented, so in order to compute the space reserved
8637 for them, it suffices to multiply the reloc count by the jump
8640 if (htab
->root
.srelplt
)
8641 htab
->sgotplt_jump_table_size
= aarch64_compute_jump_table_size (htab
);
8643 if (htab
->tlsdesc_plt
)
8645 if (htab
->root
.splt
->size
== 0)
8646 htab
->root
.splt
->size
+= PLT_ENTRY_SIZE
;
8648 htab
->tlsdesc_plt
= htab
->root
.splt
->size
;
8649 htab
->root
.splt
->size
+= PLT_TLSDESC_ENTRY_SIZE
;
8651 /* If we're not using lazy TLS relocations, don't generate the
8652 GOT entry required. */
8653 if (!(info
->flags
& DF_BIND_NOW
))
8655 htab
->dt_tlsdesc_got
= htab
->root
.sgot
->size
;
8656 htab
->root
.sgot
->size
+= GOT_ENTRY_SIZE
;
8660 /* Init mapping symbols information to use later to distingush between
8661 code and data while scanning for errata. */
8662 if (htab
->fix_erratum_835769
|| htab
->fix_erratum_843419
)
8663 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
8665 if (!is_aarch64_elf (ibfd
))
8667 bfd_elfNN_aarch64_init_maps (ibfd
);
8670 /* We now have determined the sizes of the various dynamic sections.
8671 Allocate memory for them. */
8673 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
8675 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
8678 if (s
== htab
->root
.splt
8679 || s
== htab
->root
.sgot
8680 || s
== htab
->root
.sgotplt
8681 || s
== htab
->root
.iplt
8682 || s
== htab
->root
.igotplt
8683 || s
== htab
->root
.sdynbss
8684 || s
== htab
->root
.sdynrelro
)
8686 /* Strip this section if we don't need it; see the
8689 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
8691 if (s
->size
!= 0 && s
!= htab
->root
.srelplt
)
8694 /* We use the reloc_count field as a counter if we need
8695 to copy relocs into the output file. */
8696 if (s
!= htab
->root
.srelplt
)
8701 /* It's not one of our sections, so don't allocate space. */
8707 /* If we don't need this section, strip it from the
8708 output file. This is mostly to handle .rela.bss and
8709 .rela.plt. We must create both sections in
8710 create_dynamic_sections, because they must be created
8711 before the linker maps input sections to output
8712 sections. The linker does that before
8713 adjust_dynamic_symbol is called, and it is that
8714 function which decides whether anything needs to go
8715 into these sections. */
8716 s
->flags
|= SEC_EXCLUDE
;
8720 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
8723 /* Allocate memory for the section contents. We use bfd_zalloc
8724 here in case unused entries are not reclaimed before the
8725 section's contents are written out. This should not happen,
8726 but this way if it does, we get a R_AARCH64_NONE reloc instead
8728 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
8729 if (s
->contents
== NULL
)
8733 if (htab
->root
.dynamic_sections_created
)
8735 /* Add some entries to the .dynamic section. We fill in the
8736 values later, in elfNN_aarch64_finish_dynamic_sections, but we
8737 must add the entries now so that we get the correct size for
8738 the .dynamic section. The DT_DEBUG entry is filled in by the
8739 dynamic linker and used by the debugger. */
8740 #define add_dynamic_entry(TAG, VAL) \
8741 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
8743 if (bfd_link_executable (info
))
8745 if (!add_dynamic_entry (DT_DEBUG
, 0))
8749 if (htab
->root
.splt
->size
!= 0)
8751 if (!add_dynamic_entry (DT_PLTGOT
, 0)
8752 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
8753 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
8754 || !add_dynamic_entry (DT_JMPREL
, 0))
8757 if (htab
->tlsdesc_plt
8758 && (!add_dynamic_entry (DT_TLSDESC_PLT
, 0)
8759 || !add_dynamic_entry (DT_TLSDESC_GOT
, 0)))
8765 if (!add_dynamic_entry (DT_RELA
, 0)
8766 || !add_dynamic_entry (DT_RELASZ
, 0)
8767 || !add_dynamic_entry (DT_RELAENT
, RELOC_SIZE (htab
)))
8770 /* If any dynamic relocs apply to a read-only section,
8771 then we need a DT_TEXTREL entry. */
8772 if ((info
->flags
& DF_TEXTREL
) == 0)
8773 elf_link_hash_traverse (&htab
->root
, maybe_set_textrel
, info
);
8775 if ((info
->flags
& DF_TEXTREL
) != 0)
8777 if (!add_dynamic_entry (DT_TEXTREL
, 0))
8782 #undef add_dynamic_entry
8788 elf_aarch64_update_plt_entry (bfd
*output_bfd
,
8789 bfd_reloc_code_real_type r_type
,
8790 bfd_byte
*plt_entry
, bfd_vma value
)
8792 reloc_howto_type
*howto
= elfNN_aarch64_howto_from_bfd_reloc (r_type
);
8794 /* FIXME: We should check the return value from this function call. */
8795 (void) _bfd_aarch64_elf_put_addend (output_bfd
, plt_entry
, r_type
, howto
, value
);
8799 elfNN_aarch64_create_small_pltn_entry (struct elf_link_hash_entry
*h
,
8800 struct elf_aarch64_link_hash_table
8801 *htab
, bfd
*output_bfd
,
8802 struct bfd_link_info
*info
)
8804 bfd_byte
*plt_entry
;
8807 bfd_vma gotplt_entry_address
;
8808 bfd_vma plt_entry_address
;
8809 Elf_Internal_Rela rela
;
8811 asection
*plt
, *gotplt
, *relplt
;
8813 /* When building a static executable, use .iplt, .igot.plt and
8814 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8815 if (htab
->root
.splt
!= NULL
)
8817 plt
= htab
->root
.splt
;
8818 gotplt
= htab
->root
.sgotplt
;
8819 relplt
= htab
->root
.srelplt
;
8823 plt
= htab
->root
.iplt
;
8824 gotplt
= htab
->root
.igotplt
;
8825 relplt
= htab
->root
.irelplt
;
8828 /* Get the index in the procedure linkage table which
8829 corresponds to this symbol. This is the index of this symbol
8830 in all the symbols for which we are making plt entries. The
8831 first entry in the procedure linkage table is reserved.
8833 Get the offset into the .got table of the entry that
8834 corresponds to this function. Each .got entry is GOT_ENTRY_SIZE
8835 bytes. The first three are reserved for the dynamic linker.
8837 For static executables, we don't reserve anything. */
8839 if (plt
== htab
->root
.splt
)
8841 plt_index
= (h
->plt
.offset
- htab
->plt_header_size
) / htab
->plt_entry_size
;
8842 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
8846 plt_index
= h
->plt
.offset
/ htab
->plt_entry_size
;
8847 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
8850 plt_entry
= plt
->contents
+ h
->plt
.offset
;
8851 plt_entry_address
= plt
->output_section
->vma
8852 + plt
->output_offset
+ h
->plt
.offset
;
8853 gotplt_entry_address
= gotplt
->output_section
->vma
+
8854 gotplt
->output_offset
+ got_offset
;
8856 /* Copy in the boiler-plate for the PLTn entry. */
8857 memcpy (plt_entry
, elfNN_aarch64_small_plt_entry
, PLT_SMALL_ENTRY_SIZE
);
8859 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
8860 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
8861 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
8863 PG (gotplt_entry_address
) -
8864 PG (plt_entry_address
));
8866 /* Fill in the lo12 bits for the load from the pltgot. */
8867 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
8869 PG_OFFSET (gotplt_entry_address
));
8871 /* Fill in the lo12 bits for the add from the pltgot entry. */
8872 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
8874 PG_OFFSET (gotplt_entry_address
));
8876 /* All the GOTPLT Entries are essentially initialized to PLT0. */
8877 bfd_put_NN (output_bfd
,
8878 plt
->output_section
->vma
+ plt
->output_offset
,
8879 gotplt
->contents
+ got_offset
);
8881 rela
.r_offset
= gotplt_entry_address
;
8883 if (h
->dynindx
== -1
8884 || ((bfd_link_executable (info
)
8885 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
8887 && h
->type
== STT_GNU_IFUNC
))
8889 /* If an STT_GNU_IFUNC symbol is locally defined, generate
8890 R_AARCH64_IRELATIVE instead of R_AARCH64_JUMP_SLOT. */
8891 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (IRELATIVE
));
8892 rela
.r_addend
= (h
->root
.u
.def
.value
8893 + h
->root
.u
.def
.section
->output_section
->vma
8894 + h
->root
.u
.def
.section
->output_offset
);
8898 /* Fill in the entry in the .rela.plt section. */
8899 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (JUMP_SLOT
));
8903 /* Compute the relocation entry to used based on PLT index and do
8904 not adjust reloc_count. The reloc_count has already been adjusted
8905 to account for this entry. */
8906 loc
= relplt
->contents
+ plt_index
* RELOC_SIZE (htab
);
8907 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
8910 /* Size sections even though they're not dynamic. We use it to setup
8911 _TLS_MODULE_BASE_, if needed. */
8914 elfNN_aarch64_always_size_sections (bfd
*output_bfd
,
8915 struct bfd_link_info
*info
)
8919 if (bfd_link_relocatable (info
))
8922 tls_sec
= elf_hash_table (info
)->tls_sec
;
8926 struct elf_link_hash_entry
*tlsbase
;
8928 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
8929 "_TLS_MODULE_BASE_", TRUE
, TRUE
, FALSE
);
8933 struct bfd_link_hash_entry
*h
= NULL
;
8934 const struct elf_backend_data
*bed
=
8935 get_elf_backend_data (output_bfd
);
8937 if (!(_bfd_generic_link_add_one_symbol
8938 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
8939 tls_sec
, 0, NULL
, FALSE
, bed
->collect
, &h
)))
8942 tlsbase
->type
= STT_TLS
;
8943 tlsbase
= (struct elf_link_hash_entry
*) h
;
8944 tlsbase
->def_regular
= 1;
8945 tlsbase
->other
= STV_HIDDEN
;
8946 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
8953 /* Finish up dynamic symbol handling. We set the contents of various
8954 dynamic sections here. */
8957 elfNN_aarch64_finish_dynamic_symbol (bfd
*output_bfd
,
8958 struct bfd_link_info
*info
,
8959 struct elf_link_hash_entry
*h
,
8960 Elf_Internal_Sym
*sym
)
8962 struct elf_aarch64_link_hash_table
*htab
;
8963 htab
= elf_aarch64_hash_table (info
);
8965 if (h
->plt
.offset
!= (bfd_vma
) - 1)
8967 asection
*plt
, *gotplt
, *relplt
;
8969 /* This symbol has an entry in the procedure linkage table. Set
8972 /* When building a static executable, use .iplt, .igot.plt and
8973 .rela.iplt sections for STT_GNU_IFUNC symbols. */
8974 if (htab
->root
.splt
!= NULL
)
8976 plt
= htab
->root
.splt
;
8977 gotplt
= htab
->root
.sgotplt
;
8978 relplt
= htab
->root
.srelplt
;
8982 plt
= htab
->root
.iplt
;
8983 gotplt
= htab
->root
.igotplt
;
8984 relplt
= htab
->root
.irelplt
;
8987 /* This symbol has an entry in the procedure linkage table. Set
8989 if ((h
->dynindx
== -1
8990 && !((h
->forced_local
|| bfd_link_executable (info
))
8992 && h
->type
== STT_GNU_IFUNC
))
8998 elfNN_aarch64_create_small_pltn_entry (h
, htab
, output_bfd
, info
);
8999 if (!h
->def_regular
)
9001 /* Mark the symbol as undefined, rather than as defined in
9002 the .plt section. */
9003 sym
->st_shndx
= SHN_UNDEF
;
9004 /* If the symbol is weak we need to clear the value.
9005 Otherwise, the PLT entry would provide a definition for
9006 the symbol even if the symbol wasn't defined anywhere,
9007 and so the symbol would never be NULL. Leave the value if
9008 there were any relocations where pointer equality matters
9009 (this is a clue for the dynamic linker, to make function
9010 pointer comparisons work between an application and shared
9012 if (!h
->ref_regular_nonweak
|| !h
->pointer_equality_needed
)
9017 if (h
->got
.offset
!= (bfd_vma
) - 1
9018 && elf_aarch64_hash_entry (h
)->got_type
== GOT_NORMAL
9019 /* Undefined weak symbol in static PIE resolves to 0 without
9020 any dynamic relocations. */
9021 && !UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
9023 Elf_Internal_Rela rela
;
9026 /* This symbol has an entry in the global offset table. Set it
9028 if (htab
->root
.sgot
== NULL
|| htab
->root
.srelgot
== NULL
)
9031 rela
.r_offset
= (htab
->root
.sgot
->output_section
->vma
9032 + htab
->root
.sgot
->output_offset
9033 + (h
->got
.offset
& ~(bfd_vma
) 1));
9036 && h
->type
== STT_GNU_IFUNC
)
9038 if (bfd_link_pic (info
))
9040 /* Generate R_AARCH64_GLOB_DAT. */
9047 if (!h
->pointer_equality_needed
)
9050 /* For non-shared object, we can't use .got.plt, which
9051 contains the real function address if we need pointer
9052 equality. We load the GOT entry with the PLT entry. */
9053 plt
= htab
->root
.splt
? htab
->root
.splt
: htab
->root
.iplt
;
9054 bfd_put_NN (output_bfd
, (plt
->output_section
->vma
9055 + plt
->output_offset
9057 htab
->root
.sgot
->contents
9058 + (h
->got
.offset
& ~(bfd_vma
) 1));
9062 else if (bfd_link_pic (info
) && SYMBOL_REFERENCES_LOCAL (info
, h
))
9064 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
9067 BFD_ASSERT ((h
->got
.offset
& 1) != 0);
9068 rela
.r_info
= ELFNN_R_INFO (0, AARCH64_R (RELATIVE
));
9069 rela
.r_addend
= (h
->root
.u
.def
.value
9070 + h
->root
.u
.def
.section
->output_section
->vma
9071 + h
->root
.u
.def
.section
->output_offset
);
9076 BFD_ASSERT ((h
->got
.offset
& 1) == 0);
9077 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
9078 htab
->root
.sgot
->contents
+ h
->got
.offset
);
9079 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (GLOB_DAT
));
9083 loc
= htab
->root
.srelgot
->contents
;
9084 loc
+= htab
->root
.srelgot
->reloc_count
++ * RELOC_SIZE (htab
);
9085 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9090 Elf_Internal_Rela rela
;
9094 /* This symbol needs a copy reloc. Set it up. */
9095 if (h
->dynindx
== -1
9096 || (h
->root
.type
!= bfd_link_hash_defined
9097 && h
->root
.type
!= bfd_link_hash_defweak
)
9098 || htab
->root
.srelbss
== NULL
)
9101 rela
.r_offset
= (h
->root
.u
.def
.value
9102 + h
->root
.u
.def
.section
->output_section
->vma
9103 + h
->root
.u
.def
.section
->output_offset
);
9104 rela
.r_info
= ELFNN_R_INFO (h
->dynindx
, AARCH64_R (COPY
));
9106 if (h
->root
.u
.def
.section
== htab
->root
.sdynrelro
)
9107 s
= htab
->root
.sreldynrelro
;
9109 s
= htab
->root
.srelbss
;
9110 loc
= s
->contents
+ s
->reloc_count
++ * RELOC_SIZE (htab
);
9111 bfd_elfNN_swap_reloca_out (output_bfd
, &rela
, loc
);
9114 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
9115 be NULL for local symbols. */
9117 && (h
== elf_hash_table (info
)->hdynamic
9118 || h
== elf_hash_table (info
)->hgot
))
9119 sym
->st_shndx
= SHN_ABS
;
9124 /* Finish up local dynamic symbol handling. We set the contents of
9125 various dynamic sections here. */
9128 elfNN_aarch64_finish_local_dynamic_symbol (void **slot
, void *inf
)
9130 struct elf_link_hash_entry
*h
9131 = (struct elf_link_hash_entry
*) *slot
;
9132 struct bfd_link_info
*info
9133 = (struct bfd_link_info
*) inf
;
9135 return elfNN_aarch64_finish_dynamic_symbol (info
->output_bfd
,
9140 elfNN_aarch64_init_small_plt0_entry (bfd
*output_bfd ATTRIBUTE_UNUSED
,
9141 struct elf_aarch64_link_hash_table
9144 /* Fill in PLT0. Fixme:RR Note this doesn't distinguish between
9145 small and large plts and at the minute just generates
9148 /* PLT0 of the small PLT looks like this in ELF64 -
9149 stp x16, x30, [sp, #-16]! // Save the reloc and lr on stack.
9150 adrp x16, PLT_GOT + 16 // Get the page base of the GOTPLT
9151 ldr x17, [x16, #:lo12:PLT_GOT+16] // Load the address of the
9153 add x16, x16, #:lo12:PLT_GOT+16 // Load the lo12 bits of the
9154 // GOTPLT entry for this.
9156 PLT0 will be slightly different in ELF32 due to different got entry
9158 bfd_vma plt_got_2nd_ent
; /* Address of GOT[2]. */
9162 memcpy (htab
->root
.splt
->contents
, elfNN_aarch64_small_plt0_entry
,
9164 elf_section_data (htab
->root
.splt
->output_section
)->this_hdr
.sh_entsize
=
9167 plt_got_2nd_ent
= (htab
->root
.sgotplt
->output_section
->vma
9168 + htab
->root
.sgotplt
->output_offset
9169 + GOT_ENTRY_SIZE
* 2);
9171 plt_base
= htab
->root
.splt
->output_section
->vma
+
9172 htab
->root
.splt
->output_offset
;
9174 /* Fill in the top 21 bits for this: ADRP x16, PLT_GOT + n * 8.
9175 ADRP: ((PG(S+A)-PG(P)) >> 12) & 0x1fffff */
9176 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9177 htab
->root
.splt
->contents
+ 4,
9178 PG (plt_got_2nd_ent
) - PG (plt_base
+ 4));
9180 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_LDSTNN_LO12
,
9181 htab
->root
.splt
->contents
+ 8,
9182 PG_OFFSET (plt_got_2nd_ent
));
9184 elf_aarch64_update_plt_entry (output_bfd
, BFD_RELOC_AARCH64_ADD_LO12
,
9185 htab
->root
.splt
->contents
+ 12,
9186 PG_OFFSET (plt_got_2nd_ent
));
9190 elfNN_aarch64_finish_dynamic_sections (bfd
*output_bfd
,
9191 struct bfd_link_info
*info
)
9193 struct elf_aarch64_link_hash_table
*htab
;
9197 htab
= elf_aarch64_hash_table (info
);
9198 dynobj
= htab
->root
.dynobj
;
9199 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
9201 if (htab
->root
.dynamic_sections_created
)
9203 ElfNN_External_Dyn
*dyncon
, *dynconend
;
9205 if (sdyn
== NULL
|| htab
->root
.sgot
== NULL
)
9208 dyncon
= (ElfNN_External_Dyn
*) sdyn
->contents
;
9209 dynconend
= (ElfNN_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
9210 for (; dyncon
< dynconend
; dyncon
++)
9212 Elf_Internal_Dyn dyn
;
9215 bfd_elfNN_swap_dyn_in (dynobj
, dyncon
, &dyn
);
9223 s
= htab
->root
.sgotplt
;
9224 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
9228 s
= htab
->root
.srelplt
;
9229 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
9233 s
= htab
->root
.srelplt
;
9234 dyn
.d_un
.d_val
= s
->size
;
9237 case DT_TLSDESC_PLT
:
9238 s
= htab
->root
.splt
;
9239 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
9240 + htab
->tlsdesc_plt
;
9243 case DT_TLSDESC_GOT
:
9244 s
= htab
->root
.sgot
;
9245 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
9246 + htab
->dt_tlsdesc_got
;
9250 bfd_elfNN_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
9255 /* Fill in the special first entry in the procedure linkage table. */
9256 if (htab
->root
.splt
&& htab
->root
.splt
->size
> 0)
9258 elfNN_aarch64_init_small_plt0_entry (output_bfd
, htab
);
9260 elf_section_data (htab
->root
.splt
->output_section
)->
9261 this_hdr
.sh_entsize
= htab
->plt_entry_size
;
9264 if (htab
->tlsdesc_plt
)
9266 bfd_put_NN (output_bfd
, (bfd_vma
) 0,
9267 htab
->root
.sgot
->contents
+ htab
->dt_tlsdesc_got
);
9269 memcpy (htab
->root
.splt
->contents
+ htab
->tlsdesc_plt
,
9270 elfNN_aarch64_tlsdesc_small_plt_entry
,
9271 sizeof (elfNN_aarch64_tlsdesc_small_plt_entry
));
9274 bfd_vma adrp1_addr
=
9275 htab
->root
.splt
->output_section
->vma
9276 + htab
->root
.splt
->output_offset
+ htab
->tlsdesc_plt
+ 4;
9278 bfd_vma adrp2_addr
= adrp1_addr
+ 4;
9281 htab
->root
.sgot
->output_section
->vma
9282 + htab
->root
.sgot
->output_offset
;
9284 bfd_vma pltgot_addr
=
9285 htab
->root
.sgotplt
->output_section
->vma
9286 + htab
->root
.sgotplt
->output_offset
;
9288 bfd_vma dt_tlsdesc_got
= got_addr
+ htab
->dt_tlsdesc_got
;
9290 bfd_byte
*plt_entry
=
9291 htab
->root
.splt
->contents
+ htab
->tlsdesc_plt
;
9293 /* adrp x2, DT_TLSDESC_GOT */
9294 elf_aarch64_update_plt_entry (output_bfd
,
9295 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9297 (PG (dt_tlsdesc_got
)
9298 - PG (adrp1_addr
)));
9301 elf_aarch64_update_plt_entry (output_bfd
,
9302 BFD_RELOC_AARCH64_ADR_HI21_PCREL
,
9305 - PG (adrp2_addr
)));
9307 /* ldr x2, [x2, #0] */
9308 elf_aarch64_update_plt_entry (output_bfd
,
9309 BFD_RELOC_AARCH64_LDSTNN_LO12
,
9311 PG_OFFSET (dt_tlsdesc_got
));
9314 elf_aarch64_update_plt_entry (output_bfd
,
9315 BFD_RELOC_AARCH64_ADD_LO12
,
9317 PG_OFFSET (pltgot_addr
));
9322 if (htab
->root
.sgotplt
)
9324 if (bfd_is_abs_section (htab
->root
.sgotplt
->output_section
))
9327 (_("discarded output section: `%pA'"), htab
->root
.sgotplt
);
9331 /* Fill in the first three entries in the global offset table. */
9332 if (htab
->root
.sgotplt
->size
> 0)
9334 bfd_put_NN (output_bfd
, (bfd_vma
) 0, htab
->root
.sgotplt
->contents
);
9336 /* Write GOT[1] and GOT[2], needed for the dynamic linker. */
9337 bfd_put_NN (output_bfd
,
9339 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
);
9340 bfd_put_NN (output_bfd
,
9342 htab
->root
.sgotplt
->contents
+ GOT_ENTRY_SIZE
* 2);
9345 if (htab
->root
.sgot
)
9347 if (htab
->root
.sgot
->size
> 0)
9350 sdyn
? sdyn
->output_section
->vma
+ sdyn
->output_offset
: 0;
9351 bfd_put_NN (output_bfd
, addr
, htab
->root
.sgot
->contents
);
9355 elf_section_data (htab
->root
.sgotplt
->output_section
)->
9356 this_hdr
.sh_entsize
= GOT_ENTRY_SIZE
;
9359 if (htab
->root
.sgot
&& htab
->root
.sgot
->size
> 0)
9360 elf_section_data (htab
->root
.sgot
->output_section
)->this_hdr
.sh_entsize
9363 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
9364 htab_traverse (htab
->loc_hash_table
,
9365 elfNN_aarch64_finish_local_dynamic_symbol
,
9371 /* Return address for Ith PLT stub in section PLT, for relocation REL
9372 or (bfd_vma) -1 if it should not be included. */
9375 elfNN_aarch64_plt_sym_val (bfd_vma i
, const asection
*plt
,
9376 const arelent
*rel ATTRIBUTE_UNUSED
)
9378 return plt
->vma
+ PLT_ENTRY_SIZE
+ i
* PLT_SMALL_ENTRY_SIZE
;
9381 /* Returns TRUE if NAME is an AArch64 mapping symbol.
9382 The ARM ELF standard defines $x (for A64 code) and $d (for data).
9383 It also allows a period initiated suffix to be added to the symbol, ie:
9384 "$[adtx]\.[:sym_char]+". */
9387 is_aarch64_mapping_symbol (const char * name
)
9389 return name
!= NULL
/* Paranoia. */
9390 && name
[0] == '$' /* Note: if objcopy --prefix-symbols has been used then
9391 the mapping symbols could have acquired a prefix.
9392 We do not support this here, since such symbols no
9393 longer conform to the ARM ELF ABI. */
9394 && (name
[1] == 'd' || name
[1] == 'x')
9395 && (name
[2] == 0 || name
[2] == '.');
9396 /* FIXME: Strictly speaking the symbol is only a valid mapping symbol if
9397 any characters that follow the period are legal characters for the body
9398 of a symbol's name. For now we just assume that this is the case. */
9401 /* Make sure that mapping symbols in object files are not removed via the
9402 "strip --strip-unneeded" tool. These symbols might needed in order to
9403 correctly generate linked files. Once an object file has been linked,
9404 it should be safe to remove them. */
9407 elfNN_aarch64_backend_symbol_processing (bfd
*abfd
, asymbol
*sym
)
9409 if (((abfd
->flags
& (EXEC_P
| DYNAMIC
)) == 0)
9410 && sym
->section
!= bfd_abs_section_ptr
9411 && is_aarch64_mapping_symbol (sym
->name
))
9412 sym
->flags
|= BSF_KEEP
;
9416 /* We use this so we can override certain functions
9417 (though currently we don't). */
9419 const struct elf_size_info elfNN_aarch64_size_info
=
9421 sizeof (ElfNN_External_Ehdr
),
9422 sizeof (ElfNN_External_Phdr
),
9423 sizeof (ElfNN_External_Shdr
),
9424 sizeof (ElfNN_External_Rel
),
9425 sizeof (ElfNN_External_Rela
),
9426 sizeof (ElfNN_External_Sym
),
9427 sizeof (ElfNN_External_Dyn
),
9428 sizeof (Elf_External_Note
),
9429 4, /* Hash table entry size. */
9430 1, /* Internal relocs per external relocs. */
9431 ARCH_SIZE
, /* Arch size. */
9432 LOG_FILE_ALIGN
, /* Log_file_align. */
9433 ELFCLASSNN
, EV_CURRENT
,
9434 bfd_elfNN_write_out_phdrs
,
9435 bfd_elfNN_write_shdrs_and_ehdr
,
9436 bfd_elfNN_checksum_contents
,
9437 bfd_elfNN_write_relocs
,
9438 bfd_elfNN_swap_symbol_in
,
9439 bfd_elfNN_swap_symbol_out
,
9440 bfd_elfNN_slurp_reloc_table
,
9441 bfd_elfNN_slurp_symbol_table
,
9442 bfd_elfNN_swap_dyn_in
,
9443 bfd_elfNN_swap_dyn_out
,
9444 bfd_elfNN_swap_reloc_in
,
9445 bfd_elfNN_swap_reloc_out
,
9446 bfd_elfNN_swap_reloca_in
,
9447 bfd_elfNN_swap_reloca_out
9450 #define ELF_ARCH bfd_arch_aarch64
9451 #define ELF_MACHINE_CODE EM_AARCH64
9452 #define ELF_MAXPAGESIZE 0x10000
9453 #define ELF_MINPAGESIZE 0x1000
9454 #define ELF_COMMONPAGESIZE 0x1000
9456 #define bfd_elfNN_close_and_cleanup \
9457 elfNN_aarch64_close_and_cleanup
9459 #define bfd_elfNN_bfd_free_cached_info \
9460 elfNN_aarch64_bfd_free_cached_info
9462 #define bfd_elfNN_bfd_is_target_special_symbol \
9463 elfNN_aarch64_is_target_special_symbol
9465 #define bfd_elfNN_bfd_link_hash_table_create \
9466 elfNN_aarch64_link_hash_table_create
9468 #define bfd_elfNN_bfd_merge_private_bfd_data \
9469 elfNN_aarch64_merge_private_bfd_data
9471 #define bfd_elfNN_bfd_print_private_bfd_data \
9472 elfNN_aarch64_print_private_bfd_data
9474 #define bfd_elfNN_bfd_reloc_type_lookup \
9475 elfNN_aarch64_reloc_type_lookup
9477 #define bfd_elfNN_bfd_reloc_name_lookup \
9478 elfNN_aarch64_reloc_name_lookup
9480 #define bfd_elfNN_bfd_set_private_flags \
9481 elfNN_aarch64_set_private_flags
9483 #define bfd_elfNN_find_inliner_info \
9484 elfNN_aarch64_find_inliner_info
9486 #define bfd_elfNN_find_nearest_line \
9487 elfNN_aarch64_find_nearest_line
9489 #define bfd_elfNN_mkobject \
9490 elfNN_aarch64_mkobject
9492 #define bfd_elfNN_new_section_hook \
9493 elfNN_aarch64_new_section_hook
9495 #define elf_backend_adjust_dynamic_symbol \
9496 elfNN_aarch64_adjust_dynamic_symbol
9498 #define elf_backend_always_size_sections \
9499 elfNN_aarch64_always_size_sections
9501 #define elf_backend_check_relocs \
9502 elfNN_aarch64_check_relocs
9504 #define elf_backend_copy_indirect_symbol \
9505 elfNN_aarch64_copy_indirect_symbol
9507 /* Create .dynbss, and .rela.bss sections in DYNOBJ, and set up shortcuts
9508 to them in our hash. */
9509 #define elf_backend_create_dynamic_sections \
9510 elfNN_aarch64_create_dynamic_sections
9512 #define elf_backend_init_index_section \
9513 _bfd_elf_init_2_index_sections
9515 #define elf_backend_finish_dynamic_sections \
9516 elfNN_aarch64_finish_dynamic_sections
9518 #define elf_backend_finish_dynamic_symbol \
9519 elfNN_aarch64_finish_dynamic_symbol
9521 #define elf_backend_object_p \
9522 elfNN_aarch64_object_p
9524 #define elf_backend_output_arch_local_syms \
9525 elfNN_aarch64_output_arch_local_syms
9527 #define elf_backend_plt_sym_val \
9528 elfNN_aarch64_plt_sym_val
9530 #define elf_backend_post_process_headers \
9531 elfNN_aarch64_post_process_headers
9533 #define elf_backend_relocate_section \
9534 elfNN_aarch64_relocate_section
9536 #define elf_backend_reloc_type_class \
9537 elfNN_aarch64_reloc_type_class
9539 #define elf_backend_section_from_shdr \
9540 elfNN_aarch64_section_from_shdr
9542 #define elf_backend_size_dynamic_sections \
9543 elfNN_aarch64_size_dynamic_sections
9545 #define elf_backend_size_info \
9546 elfNN_aarch64_size_info
9548 #define elf_backend_write_section \
9549 elfNN_aarch64_write_section
9551 #define elf_backend_symbol_processing \
9552 elfNN_aarch64_backend_symbol_processing
9554 #define elf_backend_can_refcount 1
9555 #define elf_backend_can_gc_sections 1
9556 #define elf_backend_plt_readonly 1
9557 #define elf_backend_want_got_plt 1
9558 #define elf_backend_want_plt_sym 0
9559 #define elf_backend_want_dynrelro 1
9560 #define elf_backend_may_use_rel_p 0
9561 #define elf_backend_may_use_rela_p 1
9562 #define elf_backend_default_use_rela_p 1
9563 #define elf_backend_rela_normal 1
9564 #define elf_backend_dtrel_excludes_plt 1
9565 #define elf_backend_got_header_size (GOT_ENTRY_SIZE * 3)
9566 #define elf_backend_default_execstack 0
9567 #define elf_backend_extern_protected_data 1
9568 #define elf_backend_hash_symbol elf_aarch64_hash_symbol
9570 #undef elf_backend_obj_attrs_section
9571 #define elf_backend_obj_attrs_section ".ARM.attributes"
9573 #include "elfNN-target.h"
9575 /* CloudABI support. */
9577 #undef TARGET_LITTLE_SYM
9578 #define TARGET_LITTLE_SYM aarch64_elfNN_le_cloudabi_vec
9579 #undef TARGET_LITTLE_NAME
9580 #define TARGET_LITTLE_NAME "elfNN-littleaarch64-cloudabi"
9581 #undef TARGET_BIG_SYM
9582 #define TARGET_BIG_SYM aarch64_elfNN_be_cloudabi_vec
9583 #undef TARGET_BIG_NAME
9584 #define TARGET_BIG_NAME "elfNN-bigaarch64-cloudabi"
9587 #define ELF_OSABI ELFOSABI_CLOUDABI
9590 #define elfNN_bed elfNN_aarch64_cloudabi_bed
9592 #include "elfNN-target.h"